From 8e070076fc4cadea4905af5fd5b6abed0d0d5aa7 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Fri, 4 Feb 2022 16:44:44 +0800
Subject: [PATCH 001/272] =?UTF-8?q?=E6=B6=88=E9=99=A4vs=E7=BC=96=E8=AF=91?=
 =?UTF-8?q?=E6=97=B6=E7=9A=84warning?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/libipc/waiter.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libipc/waiter.h b/src/libipc/waiter.h
index 2e13dc39..ce4e5924 100644
--- a/src/libipc/waiter.h
+++ b/src/libipc/waiter.h
@@ -62,12 +62,12 @@ class waiter {
     }
 
     bool notify() noexcept {
-        std::lock_guard<ipc::sync::mutex>{lock_}; // barrier
+        { IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard{lock_}; } // barrier
         return cond_.notify(lock_);
     }
 
     bool broadcast() noexcept {
-        std::lock_guard<ipc::sync::mutex>{lock_}; // barrier
+        { IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard{lock_}; } // barrier
         return cond_.broadcast(lock_);
     }
 

From a2e5cc78047670201e5e24571c72a7b31136c8ba Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Fri, 4 Feb 2022 17:48:24 +0800
Subject: [PATCH 002/272] =?UTF-8?q?=E4=BF=AE=E6=AD=A3=E5=92=8C=E6=94=B9?=
 =?UTF-8?q?=E8=BF=9Bposix=20errno=E6=89=93=E5=8D=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 include/libipc/ipc.h                       |  2 +-
 src/libipc/platform/posix/get_error.h      | 14 ++++++++++++++
 src/libipc/platform/posix/semaphore_impl.h | 15 ++++++++-------
 src/libipc/platform/posix/shm_posix.cpp    | 19 ++++++++++---------
 src/libipc/waiter.h                        |  4 ++--
 5 files changed, 35 insertions(+), 19 deletions(-)
 create mode 100644 src/libipc/platform/posix/get_error.h

diff --git a/include/libipc/ipc.h b/include/libipc/ipc.h
index 64b262c9..ceb26eac 100755
--- a/include/libipc/ipc.h
+++ b/include/libipc/ipc.h
@@ -89,7 +89,7 @@ class chan_wrapper {
     }
 
     chan_wrapper clone() const {
-        return chan_wrapper { name(), mode_ };
+        return chan_wrapper {name(), mode_};
     }
 
     /**
diff --git a/src/libipc/platform/posix/get_error.h b/src/libipc/platform/posix/get_error.h
new file mode 100644
index 00000000..c552f226
--- /dev/null
+++ b/src/libipc/platform/posix/get_error.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <errno.h>
+#include <string.h>
+
+namespace ipc {
+namespace detail {
+
+inline char const *curr_error() noexcept {
+    return ::strerror(errno);
+}
+
+} // namespace detail
+} // namespace ipc
diff --git a/src/libipc/platform/posix/semaphore_impl.h b/src/libipc/platform/posix/semaphore_impl.h
index d48bcd4b..94a5350a 100644
--- a/src/libipc/platform/posix/semaphore_impl.h
+++ b/src/libipc/platform/posix/semaphore_impl.h
@@ -11,6 +11,7 @@
 #include "libipc/shm.h"
 
 #include "get_wait_time.h"
+#include "get_error.h"
 
 namespace ipc {
 namespace detail {
@@ -40,7 +41,7 @@ class semaphore {
         }
         h_ = ::sem_open(name, O_CREAT, 0666, static_cast<unsigned>(count));
         if (h_ == SEM_FAILED) {
-            ipc::error("fail sem_open[%d]: %s\n", errno, name);
+            ipc::error("fail sem_open[%s]: name = %s\n", curr_error(), name);
             return false;
         }
         return true;
@@ -49,14 +50,14 @@ class semaphore {
     void close() noexcept {
         if (!valid()) return;
         if (::sem_close(h_) != 0) {
-            ipc::error("fail sem_close[%d]: %s\n", errno);
+            ipc::error("fail sem_close[%s]\n", curr_error());
         }
         h_ = SEM_FAILED;
         if (shm_.name() != nullptr) {
             std::string name = shm_.name();
             if (shm_.release() <= 1) {
                 if (::sem_unlink(name.c_str()) != 0) {
-                    ipc::error("fail sem_unlink[%d]: %s, name: %s\n", errno, name.c_str());
+                    ipc::error("fail sem_unlink[%s]: name = %s\n", curr_error(), name.c_str());
                 }
             }
         }
@@ -66,15 +67,15 @@ class semaphore {
         if (!valid()) return false;
         if (tm == invalid_value) {
             if (::sem_wait(h_) != 0) {
-                ipc::error("fail sem_wait[%d]: %s\n", errno);
+                ipc::error("fail sem_wait[%s]\n", curr_error());
                 return false;
             }
         } else {
             auto ts = detail::make_timespec(tm);
             if (::sem_timedwait(h_, &ts) != 0) {
                 if (errno != ETIMEDOUT) {
-                    ipc::error("fail sem_timedwait[%d]: tm = %zd, tv_sec = %ld, tv_nsec = %ld\n",
-                                errno, tm, ts.tv_sec, ts.tv_nsec);
+                    ipc::error("fail sem_timedwait[%s]: tm = %zd, tv_sec = %ld, tv_nsec = %ld\n",
+                                curr_error(), tm, ts.tv_sec, ts.tv_nsec);
                 }
                 return false;
             }
@@ -86,7 +87,7 @@ class semaphore {
         if (!valid()) return false;
         for (std::uint32_t i = 0; i < count; ++i) {
             if (::sem_post(h_) != 0) {
-                ipc::error("fail sem_post[%d]: %s\n", errno);
+                ipc::error("fail sem_post[%s]\n", curr_error());
                 return false;
             }
         }
diff --git a/src/libipc/platform/posix/shm_posix.cpp b/src/libipc/platform/posix/shm_posix.cpp
index 7f70b070..7ed98c87 100644
--- a/src/libipc/platform/posix/shm_posix.cpp
+++ b/src/libipc/platform/posix/shm_posix.cpp
@@ -4,7 +4,6 @@
 #include <sys/types.h>
 #include <unistd.h>
 #include <fcntl.h>
-#include <errno.h>
 
 #include <atomic>
 #include <string>
@@ -18,6 +17,8 @@
 #include "libipc/utility/log.h"
 #include "libipc/memory/resource.h"
 
+#include "get_error.h"
+
 namespace {
 
 struct info_t {
@@ -70,7 +71,7 @@ id_t acquire(char const * name, std::size_t size, unsigned mode) {
                                                S_IRGRP | S_IWGRP |
                                                S_IROTH | S_IWOTH);
     if (fd == -1) {
-        ipc::error("fail shm_open[%d]: %s\n", errno, name);
+        ipc::error("fail shm_open[%s]: name = %s\n", curr_error(), name);
         return nullptr;
     }
     auto ii = mem::alloc<id_info_t>();
@@ -119,12 +120,12 @@ void * get_mem(id_t id, std::size_t * size) {
         ipc::error("fail get_mem: invalid id (fd = -1)\n");
         return nullptr;
     }
+    struct stat st;
+    if (::fstat(fd, &st) != 0) {
+        ipc::error("fail fstat[%s]: name = %s, size = %zd\n", curr_error(), ii->name_.c_str(), ii->size_);
+        return nullptr;
+    }
     if (ii->size_ == 0) {
-        struct stat st;
-        if (::fstat(fd, &st) != 0) {
-            ipc::error("fail fstat[%d]: %s, size = %zd\n", errno, ii->name_.c_str(), ii->size_);
-            return nullptr;
-        }
         ii->size_ = static_cast<std::size_t>(st.st_size);
         if ((ii->size_ <= sizeof(info_t)) || (ii->size_ % sizeof(info_t))) {
             ipc::error("fail get_mem: %s, invalid size = %zd\n", ii->name_.c_str(), ii->size_);
@@ -134,13 +135,13 @@ void * get_mem(id_t id, std::size_t * size) {
     else {
         ii->size_ = calc_size(ii->size_);
         if (::ftruncate(fd, static_cast<off_t>(ii->size_)) != 0) {
-            ipc::error("fail ftruncate[%d]: %s, size = %zd\n", errno, ii->name_.c_str(), ii->size_);
+            ipc::error("fail ftruncate[%s]: name = %s, size = %zd\n", curr_error(), ii->name_.c_str(), ii->size_);
             return nullptr;
         }
     }
     void* mem = ::mmap(nullptr, ii->size_, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
     if (mem == MAP_FAILED) {
-        ipc::error("fail mmap[%d]: %s, size = %zd\n", errno, ii->name_.c_str(), ii->size_);
+        ipc::error("fail mmap[%s]: name = %s, size = %zd\n", curr_error(), ii->name_.c_str(), ii->size_);
         return nullptr;
     }
     ::close(fd);
diff --git a/src/libipc/waiter.h b/src/libipc/waiter.h
index ce4e5924..130bc984 100644
--- a/src/libipc/waiter.h
+++ b/src/libipc/waiter.h
@@ -62,12 +62,12 @@ class waiter {
     }
 
     bool notify() noexcept {
-        { IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard{lock_}; } // barrier
+        { IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard {lock_}; } // barrier
         return cond_.notify(lock_);
     }
 
     bool broadcast() noexcept {
-        { IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard{lock_}; } // barrier
+        { IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard {lock_}; } // barrier
         return cond_.broadcast(lock_);
     }
 

From 912c1bfc64435863653f5b2173a0a24bda9c7589 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Fri, 4 Feb 2022 18:08:17 +0800
Subject: [PATCH 003/272] =?UTF-8?q?=E8=BF=98=E5=8E=9Fposix=20fstat?=
 =?UTF-8?q?=E4=BB=A3=E7=A0=81=E6=AE=B5=E7=9A=84=E4=BD=8D=E7=BD=AE?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/libipc/platform/posix/shm_posix.cpp | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/src/libipc/platform/posix/shm_posix.cpp b/src/libipc/platform/posix/shm_posix.cpp
index 7ed98c87..9bf09ca0 100644
--- a/src/libipc/platform/posix/shm_posix.cpp
+++ b/src/libipc/platform/posix/shm_posix.cpp
@@ -120,19 +120,18 @@ void * get_mem(id_t id, std::size_t * size) {
         ipc::error("fail get_mem: invalid id (fd = -1)\n");
         return nullptr;
     }
-    struct stat st;
-    if (::fstat(fd, &st) != 0) {
-        ipc::error("fail fstat[%s]: name = %s, size = %zd\n", curr_error(), ii->name_.c_str(), ii->size_);
-        return nullptr;
-    }
     if (ii->size_ == 0) {
+        struct stat st;
+        if (::fstat(fd, &st) != 0) {
+            ipc::error("fail fstat[%s]: name = %s, size = %zd\n", curr_error(), ii->name_.c_str(), ii->size_);
+            return nullptr;
+        }
         ii->size_ = static_cast<std::size_t>(st.st_size);
         if ((ii->size_ <= sizeof(info_t)) || (ii->size_ % sizeof(info_t))) {
             ipc::error("fail get_mem: %s, invalid size = %zd\n", ii->name_.c_str(), ii->size_);
             return nullptr;
         }
-    }
-    else {
+    } else {
         ii->size_ = calc_size(ii->size_);
         if (::ftruncate(fd, static_cast<off_t>(ii->size_)) != 0) {
             ipc::error("fail ftruncate[%s]: name = %s, size = %zd\n", curr_error(), ii->name_.c_str(), ii->size_);

From 20168fb8693d37f62900bbd8981fe8fb09d84dd4 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Feb 2022 13:47:25 +0800
Subject: [PATCH 004/272] =?UTF-8?q?=E5=B0=9D=E8=AF=95=E5=8E=BB=E9=99=A4?=
 =?UTF-8?q?=E6=81=B6=E5=BF=83=E7=9A=84=E8=BF=9E=E6=8E=A5=E6=A3=80=E6=B5=8B?=
 =?UTF-8?q?=EF=BC=88TBD=EF=BC=89?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 include/libipc/ipc.h         |  19 ---
 src/libipc/circ/elem_array.h |  17 +-
 src/libipc/circ/elem_def.h   |  34 +---
 src/libipc/ipc.cpp           |  26 ---
 src/libipc/prod_cons.h       | 316 +++++++++++------------------------
 src/libipc/queue.h           |  30 +---
 test/test_ipc.cpp            |   2 -
 test/test_queue.cpp          |  25 ++-
 8 files changed, 122 insertions(+), 347 deletions(-)

diff --git a/include/libipc/ipc.h b/include/libipc/ipc.h
index ceb26eac..0b4459f6 100755
--- a/include/libipc/ipc.h
+++ b/include/libipc/ipc.h
@@ -31,8 +31,6 @@ struct IPC_EXPORT chan_impl {
 
     static bool   send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm);
     static buff_t recv(ipc::handle_t h, std::uint64_t tm);
-
-    static bool   try_send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm);
     static buff_t try_recv(ipc::handle_t h);
 };
 
@@ -128,9 +126,6 @@ class chan_wrapper {
         return chan_wrapper(name).wait_for_recv(r_count, tm);
     }
 
-    /**
-     * If timeout, this function would call 'force_push' to send the data forcibly.
-    */
     bool send(void const * data, std::size_t size, std::uint64_t tm = default_timeout) {
         return detail_t::send(h_, data, size, tm);
     }
@@ -141,23 +136,9 @@ class chan_wrapper {
         return this->send(str.c_str(), str.size() + 1, tm);
     }
 
-    /**
-     * If timeout, this function would just return false.
-    */
-    bool try_send(void const * data, std::size_t size, std::uint64_t tm = default_timeout) {
-        return detail_t::try_send(h_, data, size, tm);
-    }
-    bool try_send(buff_t const & buff, std::uint64_t tm = default_timeout) {
-        return this->try_send(buff.data(), buff.size(), tm);
-    }
-    bool try_send(std::string const & str, std::uint64_t tm = default_timeout) {
-        return this->try_send(str.c_str(), str.size() + 1, tm);
-    }
-
     buff_t recv(std::uint64_t tm = invalid_value) {
         return detail_t::recv(h_, tm);
     }
-
     buff_t try_recv() {
         return detail_t::try_recv(h_);
     }
diff --git a/src/libipc/circ/elem_array.h b/src/libipc/circ/elem_array.h
index 0b21f486..5febcba3 100755
--- a/src/libipc/circ/elem_array.h
+++ b/src/libipc/circ/elem_array.h
@@ -120,20 +120,15 @@ class elem_array : public ipc::circ::conn_head<Policy> {
         return head_.cursor();
     }
 
-    template <typename Q, typename F>
-    bool push(Q* que, F&& f) {
-        return head_.push(que, std::forward<F>(f), block_);
+    template <typename F>
+    bool push(F&& f) {
+        return head_.push(std::forward<F>(f), block_);
     }
 
-    template <typename Q, typename F>
-    bool force_push(Q* que, F&& f) {
-        return head_.force_push(que, std::forward<F>(f), block_);
-    }
-
-    template <typename Q, typename F, typename R>
-    bool pop(Q* que, cursor_t* cur, F&& f, R&& out) {
+    template <typename F>
+    bool pop(cursor_t* cur, F&& f) {
         if (cur == nullptr) return false;
-        return head_.pop(que, *cur, std::forward<F>(f), std::forward<R>(out), block_);
+        return head_.pop(*cur, std::forward<F>(f), block_);
     }
 };
 
diff --git a/src/libipc/circ/elem_def.h b/src/libipc/circ/elem_def.h
index 40039480..e14ef01a 100755
--- a/src/libipc/circ/elem_def.h
+++ b/src/libipc/circ/elem_def.h
@@ -50,40 +50,8 @@ class conn_head_base {
     }
 };
 
-template <typename P, bool = relat_trait<P>::is_broadcast>
-class conn_head;
-
-template <typename P>
-class conn_head<P, true> : public conn_head_base {
-public:
-    cc_t connect() noexcept {
-        for (unsigned k = 0;; ipc::yield(k)) {
-            cc_t curr = this->cc_.load(std::memory_order_acquire);
-            cc_t next = curr | (curr + 1); // find the first 0, and set it to 1.
-            if (next == 0) {
-                // connection-slot is full.
-                return 0;
-            }
-            if (this->cc_.compare_exchange_weak(curr, next, std::memory_order_release)) {
-                return next ^ curr; // return connected id
-            }
-        }
-    }
-
-    cc_t disconnect(cc_t cc_id) noexcept {
-        return this->cc_.fetch_and(~cc_id, std::memory_order_acq_rel) & ~cc_id;
-    }
-
-    std::size_t conn_count(std::memory_order order = std::memory_order_acquire) const noexcept {
-        cc_t cur = this->cc_.load(order);
-        cc_t cnt; // accumulates the total bits set in cc
-        for (cnt = 0; cur; ++cnt) cur &= cur - 1;
-        return cnt;
-    }
-};
-
 template <typename P>
-class conn_head<P, false> : public conn_head_base {
+class conn_head : public conn_head_base {
 public:
     cc_t connect() noexcept {
         return this->cc_.fetch_add(1, std::memory_order_relaxed) + 1;
diff --git a/src/libipc/ipc.cpp b/src/libipc/ipc.cpp
index c864a1b1..58d7979f 100755
--- a/src/libipc/ipc.cpp
+++ b/src/libipc/ipc.cpp
@@ -484,27 +484,6 @@ static bool send(F&& gen_push, ipc::handle_t h, void const * data, std::size_t s
 }
 
 static bool send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm) {
-    return send([tm](auto info, auto que, auto msg_id) {
-        return [tm, info, que, msg_id](std::int32_t remain, void const * data, std::size_t size) {
-            if (!wait_for(info->wt_waiter_, [&] {
-                    return !que->push(
-                        [](void*) { return true; },
-                        info->cc_id_, msg_id, remain, data, size);
-                }, tm)) {
-                ipc::log("force_push: msg_id = %zd, remain = %d, size = %zd\n", msg_id, remain, size);
-                if (!que->force_push(
-                        clear_message<typename queue_t::value_t>,
-                        info->cc_id_, msg_id, remain, data, size)) {
-                    return false;
-                }
-            }
-            info->rd_waiter_.broadcast();
-            return true;
-        };
-    }, h, data, size);
-}
-
-static bool try_send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm) {
     return send([tm](auto info, auto que, auto msg_id) {
         return [tm, info, que, msg_id](std::int32_t remain, void const * data, std::size_t size) {
             if (!wait_for(info->wt_waiter_, [&] {
@@ -676,11 +655,6 @@ buff_t chan_impl<Flag>::recv(ipc::handle_t h, std::uint64_t tm) {
     return detail_impl<policy_t<Flag>>::recv(h, tm);
 }
 
-template <typename Flag>
-bool chan_impl<Flag>::try_send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm) {
-    return detail_impl<policy_t<Flag>>::try_send(h, data, size, tm);
-}
-
 template <typename Flag>
 buff_t chan_impl<Flag>::try_recv(ipc::handle_t h) {
     return detail_impl<policy_t<Flag>>::try_recv(h);
diff --git a/src/libipc/prod_cons.h b/src/libipc/prod_cons.h
index 28d99bda..1763209e 100755
--- a/src/libipc/prod_cons.h
+++ b/src/libipc/prod_cons.h
@@ -37,8 +37,8 @@ struct prod_cons_impl<wr<relat::single, relat::single, trans::unicast>> {
         return 0;
     }
 
-    template <typename W, typename F, typename E>
-    bool push(W* /*wrapper*/, F&& f, E* elems) {
+    template <typename F, typename E>
+    bool push(F&& f, E* elems) {
         auto cur_wt = circ::index_of(wt_.load(std::memory_order_relaxed));
         if (cur_wt == circ::index_of(rd_.load(std::memory_order_acquire) - 1)) {
             return false; // full
@@ -48,24 +48,13 @@ struct prod_cons_impl<wr<relat::single, relat::single, trans::unicast>> {
         return true;
     }
 
-    /**
-     * In single-single-unicast, 'force_push' means 'no reader' or 'the only one reader is dead'.
-     * So we could just disconnect all connections of receiver, and return false.
-    */
-    template <typename W, typename F, typename E>
-    bool force_push(W* wrapper, F&&, E*) {
-        wrapper->elems()->disconnect_receiver(~static_cast<circ::cc_t>(0u));
-        return false;
-    }
-
-    template <typename W, typename F, typename R, typename E>
-    bool pop(W* /*wrapper*/, circ::u2_t& /*cur*/, F&& f, R&& out, E* elems) {
+    template <typename F, typename E>
+    bool pop(circ::u2_t& /*cur*/, F&& f, E* elems) {
         auto cur_rd = circ::index_of(rd_.load(std::memory_order_relaxed));
         if (cur_rd == circ::index_of(wt_.load(std::memory_order_acquire))) {
             return false; // empty
         }
         std::forward<F>(f)(&(elems[cur_rd].data_));
-        std::forward<R>(out)(true);
         rd_.fetch_add(1, std::memory_order_release);
         return true;
     }
@@ -75,26 +64,17 @@ template <>
 struct prod_cons_impl<wr<relat::single, relat::multi , trans::unicast>>
      : prod_cons_impl<wr<relat::single, relat::single, trans::unicast>> {
 
-    template <typename W, typename F, typename E>
-    bool force_push(W* wrapper, F&&, E*) {
-        wrapper->elems()->disconnect_receiver(1);
-        return false;
-    }
-
-    template <typename W, typename F, typename R, 
+    template <typename F, 
               template <std::size_t, std::size_t> class E, std::size_t DS, std::size_t AS>
-    bool pop(W* /*wrapper*/, circ::u2_t& /*cur*/, F&& f, R&& out, E<DS, AS>* elems) {
-        byte_t buff[DS];
+    bool pop(circ::u2_t& /*cur*/, F&& f, E<DS, AS>* elems) {
         for (unsigned k = 0;;) {
             auto cur_rd = rd_.load(std::memory_order_relaxed);
             if (circ::index_of(cur_rd) ==
                 circ::index_of(wt_.load(std::memory_order_acquire))) {
                 return false; // empty
             }
-            std::memcpy(buff, &(elems[circ::index_of(cur_rd)].data_), sizeof(buff));
             if (rd_.compare_exchange_weak(cur_rd, cur_rd + 1, std::memory_order_release)) {
-                std::forward<F>(f)(buff);
-                std::forward<R>(out)(true);
+                std::forward<F>(f)(&(elems[circ::index_of(cur_rd)].data_));
                 return true;
             }
             ipc::yield(k);
@@ -116,8 +96,8 @@ struct prod_cons_impl<wr<relat::multi , relat::multi, trans::unicast>>
 
     alignas(cache_line_size) std::atomic<circ::u2_t> ct_; // commit index
 
-    template <typename W, typename F, typename E>
-    bool push(W* /*wrapper*/, F&& f, E* elems) {
+    template <typename F, typename E>
+    bool push(F&& f, E* elems) {
         circ::u2_t cur_ct, nxt_ct;
         for (unsigned k = 0;;) {
             cur_ct = ct_.load(std::memory_order_relaxed);
@@ -153,16 +133,9 @@ struct prod_cons_impl<wr<relat::multi , relat::multi, trans::unicast>>
         return true;
     }
 
-    template <typename W, typename F, typename E>
-    bool force_push(W* wrapper, F&&, E*) {
-        wrapper->elems()->disconnect_receiver(1);
-        return false;
-    }
-
-    template <typename W, typename F, typename R, 
+    template <typename F, 
               template <std::size_t, std::size_t> class E, std::size_t DS, std::size_t AS>
-    bool pop(W* /*wrapper*/, circ::u2_t& /*cur*/, F&& f, R&& out, E<DS, AS>* elems) {
-        byte_t buff[DS];
+    bool pop(circ::u2_t& /*cur*/, F&& f, E<DS, AS>* elems) {
         for (unsigned k = 0;;) {
             auto cur_rd = rd_.load(std::memory_order_relaxed);
             auto cur_wt = wt_.load(std::memory_order_acquire);
@@ -179,15 +152,11 @@ struct prod_cons_impl<wr<relat::multi , relat::multi, trans::unicast>>
                 }
                 k = 0;
             }
-            else {
-                std::memcpy(buff, &(elems[circ::index_of(cur_rd)].data_), sizeof(buff));
-                if (rd_.compare_exchange_weak(cur_rd, cur_rd + 1, std::memory_order_release)) {
-                    std::forward<F>(f)(buff);
-                    std::forward<R>(out)(true);
-                    return true;
-                }
-                ipc::yield(k);
+            else if (rd_.compare_exchange_weak(cur_rd, cur_rd + 1, std::memory_order_release)) {
+                std::forward<F>(f)(&(elems[id_rd].data_));
+                return true;
             }
+            ipc::yield(k);
         }
     }
 };
@@ -195,234 +164,147 @@ struct prod_cons_impl<wr<relat::multi , relat::multi, trans::unicast>>
 template <>
 struct prod_cons_impl<wr<relat::single, relat::multi, trans::broadcast>> {
 
-    using rc_t = std::uint64_t;
-
-    enum : rc_t {
-        ep_mask = 0x00000000ffffffffull,
-        ep_incr = 0x0000000100000000ull
-    };
+    using flag_t = std::uint64_t;
 
     template <std::size_t DataSize, std::size_t AlignSize>
     struct elem_t {
         std::aligned_storage_t<DataSize, AlignSize> data_ {};
-        std::atomic<rc_t> rc_ { 0 }; // read-counter
+        std::atomic<flag_t> f_rc_ { 0 }; // read-flag
     };
 
     alignas(cache_line_size) std::atomic<circ::u2_t> wt_;   // write index
-    alignas(cache_line_size) rc_t epoch_ { 0 };             // only one writer
 
     circ::u2_t cursor() const noexcept {
         return wt_.load(std::memory_order_acquire);
     }
 
-    template <typename W, typename F, typename E>
-    bool push(W* wrapper, F&& f, E* elems) {
-        E* el;
-        for (unsigned k = 0;;) {
-            circ::cc_t cc = wrapper->elems()->connections(std::memory_order_relaxed);
-            if (cc == 0) return false; // no reader
-            el = elems + circ::index_of(wt_.load(std::memory_order_relaxed));
-            // check all consumers have finished reading this element
-            auto cur_rc = el->rc_.load(std::memory_order_acquire);
-            circ::cc_t rem_cc = cur_rc & ep_mask;
-            if ((cc & rem_cc) && ((cur_rc & ~ep_mask) == epoch_)) {
-                return false; // has not finished yet
-            }
-            // consider rem_cc to be 0 here
-            if (el->rc_.compare_exchange_weak(
-                        cur_rc, epoch_ | static_cast<rc_t>(cc), std::memory_order_release)) {
-                break;
-            }
-            ipc::yield(k);
+    template <typename F, typename E>
+    bool push(F&& f, E* elems) {
+        E* el = elems + circ::index_of(wt_.load(std::memory_order_relaxed));
+        auto cur_rc = el->f_rc_.exchange(~0ull, std::memory_order_acq_rel);
+        // check for consumers to read this element
+        if (cur_rc != 0) {
+            return false; // full
         }
         std::forward<F>(f)(&(el->data_));
         wt_.fetch_add(1, std::memory_order_release);
         return true;
     }
 
-    template <typename W, typename F, typename E>
-    bool force_push(W* wrapper, F&& f, E* elems) {
-        E* el;
-        epoch_ += ep_incr;
-        for (unsigned k = 0;;) {
-            circ::cc_t cc = wrapper->elems()->connections(std::memory_order_relaxed);
-            if (cc == 0) return false; // no reader
-            el = elems + circ::index_of(wt_.load(std::memory_order_relaxed));
-            // check all consumers have finished reading this element
-            auto cur_rc = el->rc_.load(std::memory_order_acquire);
-            circ::cc_t rem_cc = cur_rc & ep_mask;
-            if (cc & rem_cc) {
-                ipc::log("force_push: k = %u, cc = %u, rem_cc = %u\n", k, cc, rem_cc);
-                cc = wrapper->elems()->disconnect_receiver(rem_cc); // disconnect all invalid readers
-                if (cc == 0) return false; // no reader
-            }
-            // just compare & exchange
-            if (el->rc_.compare_exchange_weak(
-                        cur_rc, epoch_ | static_cast<rc_t>(cc), std::memory_order_release)) {
-                break;
-            }
-            ipc::yield(k);
-        }
+    template <typename F, typename E>
+    bool pop(circ::u2_t& cur, F&& f, E* elems) {
+        if (cur == cursor()) return false; // empty
+        E* el = elems + circ::index_of(cur++);
         std::forward<F>(f)(&(el->data_));
-        wt_.fetch_add(1, std::memory_order_release);
+        el->f_rc_.store(0, std::memory_order_release);
         return true;
     }
-
-    template <typename W, typename F, typename R, typename E>
-    bool pop(W* wrapper, circ::u2_t& cur, F&& f, R&& out, E* elems) {
-        if (cur == cursor()) return false; // acquire
-        auto* el = elems + circ::index_of(cur++);
-        std::forward<F>(f)(&(el->data_));
-        for (unsigned k = 0;;) {
-            auto cur_rc = el->rc_.load(std::memory_order_acquire);
-            if ((cur_rc & ep_mask) == 0) {
-                std::forward<R>(out)(true);
-                return true;
-            }
-            auto nxt_rc = cur_rc & ~static_cast<rc_t>(wrapper->connected_id());
-            if (el->rc_.compare_exchange_weak(cur_rc, nxt_rc, std::memory_order_release)) {
-                std::forward<R>(out)((nxt_rc & ep_mask) == 0);
-                return true;
-            }
-            ipc::yield(k);
-        }
-    }
 };
 
 template <>
 struct prod_cons_impl<wr<relat::multi, relat::multi, trans::broadcast>> {
 
-    using rc_t   = std::uint64_t;
     using flag_t = std::uint64_t;
 
-    enum : rc_t {
-        rc_mask = 0x00000000ffffffffull,
-        ep_mask = 0x00ffffffffffffffull,
-        ep_incr = 0x0100000000000000ull,
-        ic_mask = 0xff000000ffffffffull,
-        ic_incr = 0x0000000100000000ull
+    enum : flag_t {
+        pushing = 1ull,
+        pushed  = ~0ull,
+        popped  = 0ull,
     };
 
     template <std::size_t DataSize, std::size_t AlignSize>
     struct elem_t {
         std::aligned_storage_t<DataSize, AlignSize> data_ {};
-        std::atomic<rc_t  > rc_   { 0 }; // read-counter
-        std::atomic<flag_t> f_ct_ { 0 }; // commit flag
+        std::atomic<flag_t> f_rc_ { 0 }; // read-flag
+        std::atomic<flag_t> f_ct_ { 0 }; // commit-flag
     };
 
     alignas(cache_line_size) std::atomic<circ::u2_t> ct_;   // commit index
-    alignas(cache_line_size) std::atomic<rc_t> epoch_ { 0 };
+    alignas(cache_line_size) std::atomic<circ::u2_t> wt_;   // write index
 
     circ::u2_t cursor() const noexcept {
-        return ct_.load(std::memory_order_acquire);
-    }
-
-    constexpr static rc_t inc_rc(rc_t rc) noexcept {
-        return (rc & ic_mask) | ((rc + ic_incr) & ~ic_mask);
-    }
-
-    constexpr static rc_t inc_mask(rc_t rc) noexcept {
-        return inc_rc(rc) & ~rc_mask;
+        return wt_.load(std::memory_order_acquire);
     }
 
-    template <typename W, typename F, typename E>
-    bool push(W* wrapper, F&& f, E* elems) {
+    template <typename F, typename E>
+    bool push(F&& f, E* elems) {
         E* el;
-        circ::u2_t cur_ct;
-        rc_t epoch = epoch_.load(std::memory_order_acquire);
+        circ::u2_t cur_ct, nxt_ct;
         for (unsigned k = 0;;) {
-            circ::cc_t cc = wrapper->elems()->connections(std::memory_order_relaxed);
-            if (cc == 0) return false; // no reader
-            el = elems + circ::index_of(cur_ct = ct_.load(std::memory_order_relaxed));
-            // check all consumers have finished reading this element
-            auto cur_rc = el->rc_.load(std::memory_order_relaxed);
-            circ::cc_t rem_cc = cur_rc & rc_mask;
-            if ((cc & rem_cc) && ((cur_rc & ~ep_mask) == epoch)) {
-                return false; // has not finished yet
-            }
-            else if (!rem_cc) {
-                auto cur_fl = el->f_ct_.load(std::memory_order_acquire);
-                if ((cur_fl != cur_ct) && cur_fl) {
-                    return false; // full
+            auto cac_ct = ct_.load(std::memory_order_relaxed);
+            cur_ct = cac_ct;
+            nxt_ct = cur_ct + 1;
+            el = elems + circ::index_of(cac_ct);
+            for (unsigned k = 0;;) {
+                auto cur_rc = el->f_rc_.load(std::memory_order_acquire);
+                switch (cur_rc) {
+                // helper
+                case pushing:
+                    ct_.compare_exchange_strong(cac_ct, nxt_ct, std::memory_order_release);
+                    goto try_next;
+                // full
+                case pushed:
+                    return false;
+                // writable
+                default:
+                    break;
                 }
+                if (el->f_rc_.compare_exchange_weak(cur_rc, pushing, std::memory_order_release)) {
+                    break;
+                }
+                ipc::yield(k);
             }
-            // consider rem_cc to be 0 here
-            if (el->rc_.compare_exchange_weak(
-                        cur_rc, inc_mask(epoch | (cur_rc & ep_mask)) | static_cast<rc_t>(cc), std::memory_order_relaxed) &&
-                epoch_.compare_exchange_weak(epoch, epoch, std::memory_order_acq_rel)) {
-                break;
-            }
+            ct_.compare_exchange_strong(cac_ct, nxt_ct, std::memory_order_relaxed);
+            el->f_rc_.store(pushed, std::memory_order_relaxed);
+            std::atomic_thread_fence(std::memory_order_release);
+            break;
+        try_next:
             ipc::yield(k);
         }
-        // only one thread/process would touch here at one time
-        ct_.store(cur_ct + 1, std::memory_order_release);
         std::forward<F>(f)(&(el->data_));
         // set flag & try update wt
         el->f_ct_.store(~static_cast<flag_t>(cur_ct), std::memory_order_release);
-        return true;
-    }
-
-    template <typename W, typename F, typename E>
-    bool force_push(W* wrapper, F&& f, E* elems) {
-        E* el;
-        circ::u2_t cur_ct;
-        rc_t epoch = epoch_.fetch_add(ep_incr, std::memory_order_release) + ep_incr;
-        for (unsigned k = 0;;) {
-            circ::cc_t cc = wrapper->elems()->connections(std::memory_order_relaxed);
-            if (cc == 0) return false; // no reader
-            el = elems + circ::index_of(cur_ct = ct_.load(std::memory_order_relaxed));
-            // check all consumers have finished reading this element
-            auto cur_rc = el->rc_.load(std::memory_order_acquire);
-            circ::cc_t rem_cc = cur_rc & rc_mask;
-            if (cc & rem_cc) {
-                ipc::log("force_push: k = %u, cc = %u, rem_cc = %u\n", k, cc, rem_cc);
-                cc = wrapper->elems()->disconnect_receiver(rem_cc); // disconnect all invalid readers
-                if (cc == 0) return false; // no reader
+        while (1) {
+            auto cac_ct = el->f_ct_.load(std::memory_order_acquire);
+            if (cur_ct != wt_.load(std::memory_order_relaxed)) {
+                return true;
             }
-            // just compare & exchange
-            if (el->rc_.compare_exchange_weak(
-                        cur_rc, inc_mask(epoch | (cur_rc & ep_mask)) | static_cast<rc_t>(cc), std::memory_order_relaxed)) {
-                if (epoch == epoch_.load(std::memory_order_acquire)) {
-                    break;
-                }
-                else if (push(wrapper, std::forward<F>(f), elems)) {
-                    return true;
-                }
-                epoch = epoch_.fetch_add(ep_incr, std::memory_order_release) + ep_incr;
+            if ((~cac_ct) != cur_ct) {
+                return true;
             }
-            ipc::yield(k);
+            if (!el->f_ct_.compare_exchange_strong(cac_ct, 0, std::memory_order_relaxed)) {
+                return true;
+            }
+            wt_.store(nxt_ct, std::memory_order_release);
+            cur_ct = nxt_ct;
+            nxt_ct = cur_ct + 1;
+            el = elems + circ::index_of(cur_ct);
         }
-        // only one thread/process would touch here at one time
-        ct_.store(cur_ct + 1, std::memory_order_release);
-        std::forward<F>(f)(&(el->data_));
-        // set flag & try update wt
-        el->f_ct_.store(~static_cast<flag_t>(cur_ct), std::memory_order_release);
         return true;
     }
 
-    template <typename W, typename F, typename R, typename E, std::size_t N>
-    bool pop(W* wrapper, circ::u2_t& cur, F&& f, R&& out, E(& elems)[N]) {
-        auto* el = elems + circ::index_of(cur);
-        auto cur_fl = el->f_ct_.load(std::memory_order_acquire);
-        if (cur_fl != ~static_cast<flag_t>(cur)) {
-            return false; // empty
-        }
-        ++cur;
-        std::forward<F>(f)(&(el->data_));
+    template <typename F, typename E, std::size_t N>
+    bool pop(circ::u2_t& cur, F&& f, E(& elems)[N]) {
         for (unsigned k = 0;;) {
-            auto cur_rc = el->rc_.load(std::memory_order_acquire);
-            if ((cur_rc & rc_mask) == 0) {
-                std::forward<R>(out)(true);
-                el->f_ct_.store(cur + N - 1, std::memory_order_release);
-                return true;
-            }
-            auto nxt_rc = inc_rc(cur_rc) & ~static_cast<rc_t>(wrapper->connected_id());
-            bool last_one = false;
-            if ((last_one = (nxt_rc & rc_mask) == 0)) {
-                el->f_ct_.store(cur + N - 1, std::memory_order_release);
+            auto cur_wt = wt_.load(std::memory_order_acquire);
+            auto id_rd  = circ::index_of(cur);
+            auto id_wt  = circ::index_of(cur_wt);
+            if (id_rd == id_wt) {
+                auto* el = elems + id_wt;
+                auto cac_ct = el->f_ct_.load(std::memory_order_acquire);
+                if ((~cac_ct) != cur_wt) {
+                    return false; // empty
+                }
+                if (el->f_ct_.compare_exchange_weak(cac_ct, 0, std::memory_order_relaxed)) {
+                    wt_.store(cur_wt + 1, std::memory_order_release);
+                }
+                k = 0;
             }
-            if (el->rc_.compare_exchange_weak(cur_rc, nxt_rc, std::memory_order_release)) {
-                std::forward<R>(out)(last_one);
+            else {
+                ++cur;
+                auto* el = elems + id_rd;
+                std::forward<F>(f)(&(el->data_));
+                el->f_rc_.store(popped, std::memory_order_release);
                 return true;
             }
             ipc::yield(k);
diff --git a/src/libipc/queue.h b/src/libipc/queue.h
index f66860b8..5fe77a2e 100755
--- a/src/libipc/queue.h
+++ b/src/libipc/queue.h
@@ -158,27 +158,19 @@ class queue_base : public queue_conn {
     template <typename T, typename F, typename... P>
     bool push(F&& prep, P&&... params) {
         if (elems_ == nullptr) return false;
-        return elems_->push(this, [&](void* p) {
+        return elems_->push([&](void* p) {
             if (prep(p)) ::new (p) T(std::forward<P>(params)...);
         });
     }
 
-    template <typename T, typename F, typename... P>
-    bool force_push(F&& prep, P&&... params) {
-        if (elems_ == nullptr) return false;
-        return elems_->force_push(this, [&](void* p) {
-            if (prep(p)) ::new (p) T(std::forward<P>(params)...);
-        });
-    }
-
-    template <typename T, typename F>
-    bool pop(T& item, F&& out) {
+    template <typename T>
+    bool pop(T& item) {
         if (elems_ == nullptr) {
             return false;
         }
-        return elems_->pop(this, &(this->cursor_), [&item](void* p) {
+        return elems_->pop(&(this->cursor_), [&item](void* p) {
             ::new (&item) T(std::move(*static_cast<T*>(p)));
-        }, std::forward<F>(out));
+        });
     }
 };
 
@@ -198,18 +190,8 @@ class queue final : public detail::queue_base<typename Policy::template elems_t<
         return base_t::template push<T>(std::forward<P>(params)...);
     }
 
-    template <typename... P>
-    bool force_push(P&&... params) {
-        return base_t::template force_push<T>(std::forward<P>(params)...);
-    }
-
     bool pop(T& item) {
-        return base_t::pop(item, [](bool) {});
-    }
-
-    template <typename F>
-    bool pop(T& item, F&& out) {
-        return base_t::pop(item, std::forward<F>(out));
+        return base_t::pop(item);
     }
 };
 
diff --git a/test/test_ipc.cpp b/test/test_ipc.cpp
index a1f01083..695e6743 100755
--- a/test/test_ipc.cpp
+++ b/test/test_ipc.cpp
@@ -73,11 +73,9 @@ void test_basic(char const * name) {
 
     que_t que1 { name };
     EXPECT_FALSE(que1.send(test1));
-    EXPECT_FALSE(que1.try_send(test2));
 
     que_t que2 { que1.name(), ipc::receiver };
     ASSERT_TRUE(que1.send(test1));
-    ASSERT_TRUE(que1.try_send(test2));
 
     EXPECT_EQ(que2.recv(), test1);
     EXPECT_EQ(que2.recv(), test2);
diff --git a/test/test_queue.cpp b/test/test_queue.cpp
index e85d39fa..1d2c7321 100755
--- a/test/test_queue.cpp
+++ b/test/test_queue.cpp
@@ -5,7 +5,6 @@
 #include <new>
 #include <vector>
 #include <unordered_map>
-#include <climits>  // CHAR_BIT
 
 #include "libipc/prod_cons.h"
 #include "libipc/policy.h"
@@ -143,6 +142,8 @@ TEST(Queue, el_connection) {
         for (std::size_t i = 0; i < 10000; ++i) {
             ASSERT_TRUE(el.connect_sender());
         }
+        el.disconnect_sender();
+        EXPECT_TRUE(el.connect_sender());
     }
     {
         elems_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> el;
@@ -156,12 +157,13 @@ TEST(Queue, el_connection) {
     }
     {
         elems_t<ipc::relat::single, ipc::relat::multi, ipc::trans::broadcast> el;
-        for (std::size_t i = 0; i < (sizeof(ipc::circ::cc_t) * CHAR_BIT); ++i) {
-            ASSERT_NE(el.connect_receiver(), 0);
-        }
+        auto cc = el.connect_receiver();
+        EXPECT_EQ(cc, 1);
         for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_EQ(el.connect_receiver(), 0);
+            ASSERT_NE(el.connect_receiver(), 0);
         }
+        EXPECT_EQ(el.disconnect_receiver(cc), 10000);
+        EXPECT_EQ(el.connect_receiver(), 10000 + cc);
     }
 }
 
@@ -227,25 +229,18 @@ TEST(Queue, connection) {
         for (std::size_t i = 0; i < 10000; ++i) {
             ASSERT_TRUE(que.connect());
         }
-        for (std::size_t i = 1; i < (sizeof(ipc::circ::cc_t) * CHAR_BIT); ++i) {
-            queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_TRUE(que.connect());
-        }
         for (std::size_t i = 0; i < 10000; ++i) {
             queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_FALSE(que.connect());
+            ASSERT_TRUE(que.connect());
         }
         ASSERT_TRUE(que.disconnect());
         for (std::size_t i = 0; i < 10000; ++i) {
             ASSERT_FALSE(que.disconnect());
         }
-        {
-            queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_TRUE(que.connect());
-        }
         for (std::size_t i = 0; i < 10000; ++i) {
             queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_FALSE(que.connect());
+            ASSERT_TRUE(que.connect());
+            ASSERT_TRUE(que.disconnect());
         }
     }
 }

From f18c27ec29449840157ece7a9a57f5f817623933 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Feb 2022 17:13:28 +0800
Subject: [PATCH 005/272] =?UTF-8?q?=E5=BC=80=E5=A7=8B=E9=87=8D=E6=9E=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 CMakeLists.txt                              |  72 ++-
 include/libipc/buffer.h                     |  68 --
 include/libipc/condition.h                  |  39 --
 include/libipc/def.h                        |  69 +-
 include/libipc/detect_plat.h                | 155 +++++
 include/libipc/export.h                     |  70 +-
 include/libipc/ipc.h                        | 173 -----
 include/libipc/mutex.h                      |  39 --
 include/libipc/pool_alloc.h                 | 103 ---
 include/libipc/rw_lock.h                    | 171 -----
 include/libipc/semaphore.h                  |  37 --
 include/libipc/shm.h                        |  59 --
 include/libipc/spin_lock.h                  | 179 ++++++
 performance.xlsx                            | Bin 75641 -> 0 bytes
 src/CMakeLists.txt                          |  19 +-
 src/libipc/buffer.cpp                       |  87 ---
 src/libipc/circ/elem_array.h                | 136 ----
 src/libipc/circ/elem_def.h                  |  77 ---
 src/libipc/ipc.cpp                          | 669 +-------------------
 src/libipc/memory/alloc.h                   | 424 -------------
 src/libipc/memory/allocator_wrapper.h       | 121 ----
 src/libipc/memory/resource.h                |  90 ---
 src/libipc/memory/wrapper.h                 | 327 ----------
 src/libipc/platform/detail.h                | 136 ----
 src/libipc/platform/linux/a0/LICENSE        |  24 -
 src/libipc/platform/linux/a0/README.md      | 213 -------
 src/libipc/platform/linux/a0/atomic.h       |  36 --
 src/libipc/platform/linux/a0/clock.h        |  60 --
 src/libipc/platform/linux/a0/empty.h        |  13 -
 src/libipc/platform/linux/a0/err.c          |  50 --
 src/libipc/platform/linux/a0/err.h          |  33 -
 src/libipc/platform/linux/a0/err_macro.h    |  52 --
 src/libipc/platform/linux/a0/ftx.h          | 111 ----
 src/libipc/platform/linux/a0/inline.h       |   8 -
 src/libipc/platform/linux/a0/mtx.c          | 420 ------------
 src/libipc/platform/linux/a0/mtx.h          |  57 --
 src/libipc/platform/linux/a0/strconv.c      |  64 --
 src/libipc/platform/linux/a0/strconv.h      |  31 -
 src/libipc/platform/linux/a0/thread_local.h |  10 -
 src/libipc/platform/linux/a0/tid.c          |  30 -
 src/libipc/platform/linux/a0/tid.h          |  16 -
 src/libipc/platform/linux/a0/time.c         | 124 ----
 src/libipc/platform/linux/a0/time.h         |  97 ---
 src/libipc/platform/linux/a0/unused.h       |   7 -
 src/libipc/platform/linux/condition.h       |  66 --
 src/libipc/platform/linux/get_wait_time.h   |  46 --
 src/libipc/platform/linux/mutex.h           | 204 ------
 src/libipc/platform/linux/sync_obj_impl.h   |  69 --
 src/libipc/platform/platform.c              |  13 -
 src/libipc/platform/platform.cpp            |   9 -
 src/libipc/platform/posix/condition.h       | 141 -----
 src/libipc/platform/posix/get_error.h       |  14 -
 src/libipc/platform/posix/get_wait_time.h   |  39 --
 src/libipc/platform/posix/mutex.h           | 237 -------
 src/libipc/platform/posix/semaphore_impl.h  | 100 ---
 src/libipc/platform/posix/shm_posix.cpp     | 197 ------
 src/libipc/platform/win/condition.h         | 119 ----
 src/libipc/platform/win/get_sa.h            |  35 -
 src/libipc/platform/win/mutex.h             |  96 ---
 src/libipc/platform/win/semaphore.h         |  74 ---
 src/libipc/platform/win/shm_win.cpp         | 135 ----
 src/libipc/platform/win/to_tchar.h          |  74 ---
 src/libipc/policy.h                         |  25 -
 src/libipc/pool_alloc.cpp                   |  17 -
 src/libipc/prod_cons.h                      | 315 ---------
 src/libipc/queue.h                          | 198 ------
 src/libipc/shm.cpp                          | 103 ---
 src/libipc/sync/condition.cpp               |  72 ---
 src/libipc/sync/mutex.cpp                   |  72 ---
 src/libipc/sync/semaphore.cpp               |  66 --
 src/libipc/utility/concept.h                |  29 -
 src/libipc/utility/id_pool.h                | 103 ---
 src/libipc/utility/log.h                    |  39 --
 src/libipc/utility/pimpl.h                  |  64 --
 src/libipc/utility/scope_guard.h            |  64 --
 src/libipc/utility/utility.h                |  64 --
 src/libipc/waiter.h                         |  81 ---
 test/CMakeLists.txt                         |  15 +-
 test/test.h                                 |  86 ---
 test/test_detect_plat.cpp                   |  79 +++
 test/test_ipc.cpp                           | 183 ------
 test/test_mem.cpp                           | 218 -------
 test/test_platform.cpp                      |  31 -
 test/test_queue.cpp                         | 299 ---------
 test/test_shm.cpp                           | 102 ---
 test/test_sync.cpp                          | 208 ------
 test/test_thread_utility.cpp                | 203 ------
 test/test_waiter.cpp                        |  68 --
 test/thread_pool.h                          | 123 ----
 89 files changed, 503 insertions(+), 8868 deletions(-)
 delete mode 100755 include/libipc/buffer.h
 delete mode 100644 include/libipc/condition.h
 create mode 100644 include/libipc/detect_plat.h
 delete mode 100755 include/libipc/ipc.h
 delete mode 100644 include/libipc/mutex.h
 delete mode 100755 include/libipc/pool_alloc.h
 delete mode 100755 include/libipc/rw_lock.h
 delete mode 100644 include/libipc/semaphore.h
 delete mode 100755 include/libipc/shm.h
 create mode 100644 include/libipc/spin_lock.h
 delete mode 100644 performance.xlsx
 delete mode 100755 src/libipc/buffer.cpp
 delete mode 100755 src/libipc/circ/elem_array.h
 delete mode 100755 src/libipc/circ/elem_def.h
 delete mode 100755 src/libipc/memory/alloc.h
 delete mode 100755 src/libipc/memory/allocator_wrapper.h
 delete mode 100755 src/libipc/memory/resource.h
 delete mode 100755 src/libipc/memory/wrapper.h
 delete mode 100755 src/libipc/platform/detail.h
 delete mode 100644 src/libipc/platform/linux/a0/LICENSE
 delete mode 100644 src/libipc/platform/linux/a0/README.md
 delete mode 100644 src/libipc/platform/linux/a0/atomic.h
 delete mode 100644 src/libipc/platform/linux/a0/clock.h
 delete mode 100644 src/libipc/platform/linux/a0/empty.h
 delete mode 100644 src/libipc/platform/linux/a0/err.c
 delete mode 100644 src/libipc/platform/linux/a0/err.h
 delete mode 100644 src/libipc/platform/linux/a0/err_macro.h
 delete mode 100644 src/libipc/platform/linux/a0/ftx.h
 delete mode 100644 src/libipc/platform/linux/a0/inline.h
 delete mode 100644 src/libipc/platform/linux/a0/mtx.c
 delete mode 100644 src/libipc/platform/linux/a0/mtx.h
 delete mode 100644 src/libipc/platform/linux/a0/strconv.c
 delete mode 100644 src/libipc/platform/linux/a0/strconv.h
 delete mode 100644 src/libipc/platform/linux/a0/thread_local.h
 delete mode 100644 src/libipc/platform/linux/a0/tid.c
 delete mode 100644 src/libipc/platform/linux/a0/tid.h
 delete mode 100644 src/libipc/platform/linux/a0/time.c
 delete mode 100644 src/libipc/platform/linux/a0/time.h
 delete mode 100644 src/libipc/platform/linux/a0/unused.h
 delete mode 100644 src/libipc/platform/linux/condition.h
 delete mode 100644 src/libipc/platform/linux/get_wait_time.h
 delete mode 100644 src/libipc/platform/linux/mutex.h
 delete mode 100644 src/libipc/platform/linux/sync_obj_impl.h
 delete mode 100644 src/libipc/platform/platform.c
 delete mode 100644 src/libipc/platform/platform.cpp
 delete mode 100644 src/libipc/platform/posix/condition.h
 delete mode 100644 src/libipc/platform/posix/get_error.h
 delete mode 100644 src/libipc/platform/posix/get_wait_time.h
 delete mode 100644 src/libipc/platform/posix/mutex.h
 delete mode 100644 src/libipc/platform/posix/semaphore_impl.h
 delete mode 100644 src/libipc/platform/posix/shm_posix.cpp
 delete mode 100644 src/libipc/platform/win/condition.h
 delete mode 100644 src/libipc/platform/win/get_sa.h
 delete mode 100644 src/libipc/platform/win/mutex.h
 delete mode 100644 src/libipc/platform/win/semaphore.h
 delete mode 100755 src/libipc/platform/win/shm_win.cpp
 delete mode 100755 src/libipc/platform/win/to_tchar.h
 delete mode 100755 src/libipc/policy.h
 delete mode 100755 src/libipc/pool_alloc.cpp
 delete mode 100755 src/libipc/prod_cons.h
 delete mode 100755 src/libipc/queue.h
 delete mode 100755 src/libipc/shm.cpp
 delete mode 100644 src/libipc/sync/condition.cpp
 delete mode 100644 src/libipc/sync/mutex.cpp
 delete mode 100644 src/libipc/sync/semaphore.cpp
 delete mode 100755 src/libipc/utility/concept.h
 delete mode 100755 src/libipc/utility/id_pool.h
 delete mode 100755 src/libipc/utility/log.h
 delete mode 100755 src/libipc/utility/pimpl.h
 delete mode 100644 src/libipc/utility/scope_guard.h
 delete mode 100755 src/libipc/utility/utility.h
 delete mode 100644 src/libipc/waiter.h
 delete mode 100755 test/test.h
 create mode 100644 test/test_detect_plat.cpp
 delete mode 100755 test/test_ipc.cpp
 delete mode 100755 test/test_mem.cpp
 delete mode 100644 test/test_platform.cpp
 delete mode 100755 test/test_queue.cpp
 delete mode 100755 test/test_shm.cpp
 delete mode 100644 test/test_sync.cpp
 delete mode 100755 test/test_thread_utility.cpp
 delete mode 100755 test/test_waiter.cpp
 delete mode 100755 test/thread_pool.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6d9b2a57..1eb24a0a 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,29 +10,31 @@ set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -DNDEBUG")
 if(NOT MSVC)
-    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O2")
+  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O2")
 endif()
 
+add_definitions(-DLIBIPC_CPP_14 -DLIBIPC_CPP_17)
+
 if (MSVC)
-    set(CompilerFlags
-        CMAKE_CXX_FLAGS
-        CMAKE_CXX_FLAGS_DEBUG
-        CMAKE_CXX_FLAGS_RELEASE
-        CMAKE_C_FLAGS
-        CMAKE_C_FLAGS_DEBUG
-        CMAKE_C_FLAGS_RELEASE
-        )
-    if (LIBIPC_USE_STATIC_CRT)
-        foreach(CompilerFlag ${CompilerFlags})
-            string(REPLACE "/MD" "/MT" ${CompilerFlag} "${${CompilerFlag}}")
-            string(REPLACE "/MDd" "/MTd" ${CompilerFlag} "${${CompilerFlag}}")
-        endforeach()
-    else()
-        foreach(CompilerFlag ${CompilerFlags})
-            string(REPLACE "/MT" "/MD" ${CompilerFlag} "${${CompilerFlag}}")
-            string(REPLACE "/MTd" "/MDd" ${CompilerFlag} "${${CompilerFlag}}")
-        endforeach()
-    endif()
+  set(CompilerFlags
+      CMAKE_CXX_FLAGS
+      CMAKE_CXX_FLAGS_DEBUG
+      CMAKE_CXX_FLAGS_RELEASE
+      CMAKE_C_FLAGS
+      CMAKE_C_FLAGS_DEBUG
+      CMAKE_C_FLAGS_RELEASE
+      )
+  if (LIBIPC_USE_STATIC_CRT)
+      foreach(CompilerFlag ${CompilerFlags})
+        string(REPLACE "/MD" "/MT" ${CompilerFlag} "${${CompilerFlag}}")
+        string(REPLACE "/MDd" "/MTd" ${CompilerFlag} "${${CompilerFlag}}")
+      endforeach()
+  else()
+      foreach(CompilerFlag ${CompilerFlags})
+        string(REPLACE "/MT" "/MD" ${CompilerFlag} "${${CompilerFlag}}")
+        string(REPLACE "/MTd" "/MDd" ${CompilerFlag} "${${CompilerFlag}}")
+      endforeach()
+  endif()
 endif()
 
 set(LIBRARY_OUTPUT_PATH    ${CMAKE_BINARY_DIR}/bin)
@@ -45,23 +47,23 @@ add_definitions(-DUNICODE -D_UNICODE)
 add_subdirectory(src)
 
 if (LIBIPC_BUILD_TESTS)
-    set(GOOGLETEST_VERSION 1.10.0)
-    if (LIBIPC_USE_STATIC_CRT)
-        set(gtest_force_shared_crt OFF)
-    else()
-        set(gtest_force_shared_crt ON)
-    endif()
-    add_subdirectory(3rdparty/gtest)
-    add_subdirectory(test)
+  set(GOOGLETEST_VERSION 1.10.0)
+  if (LIBIPC_USE_STATIC_CRT)
+      set(gtest_force_shared_crt OFF)
+  else()
+      set(gtest_force_shared_crt ON)
+  endif()
+  add_subdirectory(3rdparty/gtest)
+  add_subdirectory(test)
 endif()
 
-if (LIBIPC_BUILD_DEMOS)
-    add_subdirectory(demo/chat)
-    add_subdirectory(demo/msg_que)
-    add_subdirectory(demo/send_recv)
-endif()
+# if (LIBIPC_BUILD_DEMOS)
+#   add_subdirectory(demo/chat)
+#   add_subdirectory(demo/msg_que)
+#   add_subdirectory(demo/send_recv)
+# endif()
 
 install(
-    DIRECTORY "include/"
-    DESTINATION "include"
+  DIRECTORY "include/"
+  DESTINATION "include"
 )
diff --git a/include/libipc/buffer.h b/include/libipc/buffer.h
deleted file mode 100755
index 3f8c229b..00000000
--- a/include/libipc/buffer.h
+++ /dev/null
@@ -1,68 +0,0 @@
-#pragma once
-
-#include <cstddef>
-#include <tuple>
-#include <vector>
-#include <type_traits>
-
-#include "libipc/export.h"
-#include "libipc/def.h"
-
-namespace ipc {
-
-class IPC_EXPORT buffer {
-public:
-    using destructor_t = void (*)(void*, std::size_t);
-
-    buffer();
-
-    buffer(void* p, std::size_t s, destructor_t d);
-    buffer(void* p, std::size_t s, destructor_t d, void* additional);
-    buffer(void* p, std::size_t s);
-
-    template <std::size_t N>
-    explicit buffer(byte_t const (& data)[N])
-        : buffer(data, sizeof(data)) {
-    }
-    explicit buffer(char const & c);
-
-    buffer(buffer&& rhs);
-    ~buffer();
-
-    void swap(buffer& rhs);
-    buffer& operator=(buffer rhs);
-
-    bool empty() const noexcept;
-
-    void *       data()       noexcept;
-    void const * data() const noexcept;
-
-    template <typename T>
-    T get() const { return T(data()); }
-
-    std::size_t size() const noexcept;
-
-    std::tuple<void*, std::size_t> to_tuple() {
-        return std::make_tuple(data(), size());
-    }
-
-    std::tuple<void const *, std::size_t> to_tuple() const {
-        return std::make_tuple(data(), size());
-    }
-
-    std::vector<byte_t> to_vector() const {
-        return {
-            get<byte_t const *>(),
-            get<byte_t const *>() + size()
-        };
-    }
-
-    friend IPC_EXPORT bool operator==(buffer const & b1, buffer const & b2);
-    friend IPC_EXPORT bool operator!=(buffer const & b1, buffer const & b2);
-
-private:
-    class buffer_;
-    buffer_* p_;
-};
-
-} // namespace ipc
diff --git a/include/libipc/condition.h b/include/libipc/condition.h
deleted file mode 100644
index a4e2ac30..00000000
--- a/include/libipc/condition.h
+++ /dev/null
@@ -1,39 +0,0 @@
-#pragma once
-
-#include <cstdint>  // std::uint64_t
-
-#include "libipc/export.h"
-#include "libipc/def.h"
-#include "libipc/mutex.h"
-
-namespace ipc {
-namespace sync {
-
-class IPC_EXPORT condition {
-    condition(condition const &) = delete;
-    condition &operator=(condition const &) = delete;
-
-public:
-    condition();
-    explicit condition(char const *name);
-    ~condition();
-
-    void const *native() const noexcept;
-    void *native() noexcept;
-
-    bool valid() const noexcept;
-
-    bool open(char const *name) noexcept;
-    void close() noexcept;
-
-    bool wait(ipc::sync::mutex &mtx, std::uint64_t tm = ipc::invalid_value) noexcept;
-    bool notify(ipc::sync::mutex &mtx) noexcept;
-    bool broadcast(ipc::sync::mutex &mtx) noexcept;
-
-private:
-    class condition_;
-    condition_* p_;
-};
-
-} // namespace sync
-} // namespace ipc
diff --git a/include/libipc/def.h b/include/libipc/def.h
index 8c1a72ba..b3ebd6f7 100755
--- a/include/libipc/def.h
+++ b/include/libipc/def.h
@@ -1,68 +1,19 @@
+/**
+ * @file def.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define the trivial configuration information
+ * @date 2022-02-27
+ */
 #pragma once
 
 #include <cstddef>
 #include <cstdint>
-#include <limits>       // std::numeric_limits
-#include <new>
-#include <utility>
 
-namespace ipc {
+#define LIBIPC_NAMESPACE_BEG_ namespace ipc {
+#define LIBIPC_NAMESPACE_END_ }
 
-// types
-
-using byte_t = std::uint8_t;
-
-template <std::size_t N>
-struct uint;
-
-template <> struct uint<8 > { using type = std::uint8_t ; };
-template <> struct uint<16> { using type = std::uint16_t; };
-template <> struct uint<32> { using type = std::uint32_t; };
-template <> struct uint<64> { using type = std::uint64_t; };
-
-template <std::size_t N>
-using uint_t = typename uint<N>::type;
+LIBIPC_NAMESPACE_BEG_
 
 // constants
 
-enum : std::uint32_t {
-    invalid_value   = (std::numeric_limits<std::uint32_t>::max)(),
-    default_timeout = 100, // ms
-};
-
-enum : std::size_t {
-    data_length     = 64,
-    large_msg_limit = data_length,
-    large_msg_align = 1024,
-    large_msg_cache = 32,
-};
-
-enum class relat { // multiplicity of the relationship
-    single,
-    multi
-};
-
-enum class trans { // transmission
-    unicast,
-    broadcast
-};
-
-// producer-consumer policy flag
-
-template <relat Rp, relat Rc, trans Ts>
-struct wr {};
-
-template <typename WR>
-struct relat_trait;
-
-template <relat Rp, relat Rc, trans Ts>
-struct relat_trait<wr<Rp, Rc, Ts>> {
-    constexpr static bool is_multi_producer = (Rp == relat::multi);
-    constexpr static bool is_multi_consumer = (Rc == relat::multi);
-    constexpr static bool is_broadcast      = (Ts == trans::broadcast);
-};
-
-template <template <typename> class Policy, typename Flag>
-struct relat_trait<Policy<Flag>> : relat_trait<Flag> {};
-
-} // namespace ipc
+LIBIPC_NAMESPACE_END_
diff --git a/include/libipc/detect_plat.h b/include/libipc/detect_plat.h
new file mode 100644
index 00000000..196796f7
--- /dev/null
+++ b/include/libipc/detect_plat.h
@@ -0,0 +1,155 @@
+/**
+ * @file detect_plat.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define platform detection related interfaces
+ * @date 2022-02-27
+ */
+#pragma once
+
+// OS
+
+#if defined(WINCE) || defined(_WIN32_WCE)
+# define LIBIPC_OS_WINCE
+#elif defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
+     (defined(__x86_64) && defined(__MSYS__))
+#define LIBIPC_OS_WIN64
+#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || \
+      defined(__NT__) || defined(__MSYS__)
+# define LIBIPC_OS_WIN32
+#elif defined(__linux__) || defined(__linux)
+# define LIBIPC_OS_LINUX
+#elif defined(__QNX__) || defined(__QNXNTO__)
+# define LIBIPC_OS_QNX
+#elif defined(ANDROID) || defined(__ANDROID__)
+# define LIBIPC_OS_ANDROID
+#else
+# error "This OS is unsupported."
+#endif
+
+#if defined(LIBIPC_OS_WIN32) || defined(LIBIPC_OS_WIN64) || \
+    defined(LIBIPC_OS_WINCE)
+# define LIBIPC_OS_WIN
+#endif
+
+// Compiler
+
+#if defined(_MSC_VER)
+# define LIBIPC_CC_MSVC
+#elif defined(__GNUC__)
+# define LIBIPC_CC_GNUC
+#else
+# error "This compiler is unsupported."
+#endif
+
+// Instruction set
+// @see https://sourceforge.net/p/predef/wiki/Architectures/
+
+#if defined(_M_X64) || defined(_M_AMD64) || \
+    defined(__x86_64__) || defined(__x86_64) || \
+    defined(__amd64__) || defined(__amd64)
+# define LIBIPC_INSTR_X64
+#elif defined(_M_IA64) || defined(__IA64__) || defined(_IA64) || \
+      defined(__ia64__) || defined(__ia64)
+# define LIBIPC_INSTR_I64
+#elif defined(_M_IX86) || defined(_X86_) || defined(__i386__) || defined(__i386)
+# define LIBIPC_INSTR_X86
+#elif defined(_M_ARM64) || defined(__arm64__) || defined(__aarch64__)
+# define LIBIPC_INSTR_ARM64
+#elif defined(_M_ARM) || defined(_ARM) || defined(__arm__) || defined(__arm)
+# define LIBIPC_INSTR_ARM32
+#else
+# error "This instruction set is unsupported."
+#endif
+
+#if defined(LIBIPC_INSTR_X86) || defined(LIBIPC_INSTR_X64)
+# define LIBIPC_INSTR_X86_64
+#elif defined(LIBIPC_INSTR_ARM32) || defined(LIBIPC_INSTR_ARM64)
+# define LIBIPC_INSTR_ARM
+#endif
+
+// Byte order
+
+#if defined(__BYTE_ORDER__)
+# define LIBIPC_ENDIAN_BIG   (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
+# define LIBIPC_ENDIAN_LIT   (!LIBIPC_ENDIAN_BIG)
+#else
+# define LIBIPC_ENDIAN_BIG   (0)
+# define LIBIPC_ENDIAN_LIT   (1)
+#endif
+
+// C++ version
+
+#if (__cplusplus >= 202002L) && !defined(LIBIPC_CPP_20)
+# define LIBIPC_CPP_20
+#endif
+#if (__cplusplus >= 201703L) && !defined(LIBIPC_CPP_17)
+# define LIBIPC_CPP_17
+#endif
+#if (__cplusplus >= 201402L) && !defined(LIBIPC_CPP_14)
+# define LIBIPC_CPP_14
+#endif
+
+#if !defined(LIBIPC_CPP_20) && \
+    !defined(LIBIPC_CPP_17) && \
+    !defined(LIBIPC_CPP_14)
+# error "This C++ version is unsupported."
+#endif
+
+// C++ attributes
+
+#if defined(__has_cpp_attribute)
+# if __has_cpp_attribute(fallthrough)
+#   define LIBIPC_FALLTHROUGH [[fallthrough]]
+# endif
+# if __has_cpp_attribute(maybe_unused)
+#   define LIBIPC_UNUSED [[maybe_unused]]
+# endif
+# if __has_cpp_attribute(likely)
+#   define LIBIPC_LIKELY(...) (__VA_ARGS__) [[likely]]
+# endif
+# if __has_cpp_attribute(unlikely)
+#   define LIBIPC_UNLIKELY(...) (__VA_ARGS__) [[unlikely]]
+# endif
+#endif
+
+#if !defined(LIBIPC_FALLTHROUGH)
+# if defined(LIBIPC_CC_GNUC)
+#   define LIBIPC_FALLTHROUGH __attribute__((__fallthrough__))
+# else
+#   define LIBIPC_FALLTHROUGH
+# endif
+#endif
+
+#if !defined(LIBIPC_UNUSED)
+# if defined(LIBIPC_CC_GNUC)
+#   define LIBIPC_UNUSED __attribute__((__unused__))
+# elif defined(LIBIPC_CC_MSVC_)
+#   define LIBIPC_UNUSED __pragma(warning(suppress: 4100 4101 4189))
+# else
+#   define LIBIPC_UNUSED
+# endif
+#endif
+
+#if !defined(LIBIPC_LIKELY)
+# if defined(__has_builtin)
+#   if __has_builtin(__builtin_expect)
+#     define LIBIPC_LIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 1))
+#   endif
+# endif
+#endif
+
+#if !defined(LIBIPC_LIKELY)
+# define LIBIPC_LIKELY(...) (__VA_ARGS__)
+#endif
+
+#if !defined(LIBIPC_UNLIKELY)
+# if defined(__has_builtin)
+#   if __has_builtin(__builtin_expect)
+#     define LIBIPC_UNLIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 0))
+#   endif
+# endif
+#endif
+
+#if !defined(LIBIPC_UNLIKELY)
+# define LIBIPC_UNLIKELY(...) (__VA_ARGS__)
+#endif
diff --git a/include/libipc/export.h b/include/libipc/export.h
index 6024f2f1..40a68797 100755
--- a/include/libipc/export.h
+++ b/include/libipc/export.h
@@ -1,54 +1,46 @@
+/**
+ * @file export.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define the symbol export interfaces
+ * @date 2022-02-27
+ */
 #pragma once
 
+#include "libipc/detect_plat.h"
+
 #if defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
 
-#   define IPC_DECL_EXPORT Q_DECL_EXPORT
-#   define IPC_DECL_IMPORT Q_DECL_IMPORT
+# define LIBIPC_DECL_EXPORT Q_DECL_EXPORT
+# define LIBIPC_DECL_IMPORT Q_DECL_IMPORT
 
 #else // defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
 
 /*
- * Compiler & system detection for IPC_DECL_EXPORT & IPC_DECL_IMPORT.
+ * Compiler & system detection for LIBIPC_DECL_EXPORT & LIBIPC_DECL_IMPORT.
  * Not using QtCore cause it shouldn't depend on Qt.
 */
-
-#if defined(_MSC_VER)
-#   define IPC_DECL_EXPORT      __declspec(dllexport)
-#   define IPC_DECL_IMPORT      __declspec(dllimport)
-#elif defined(__ARMCC__) || defined(__CC_ARM)
-#   if defined(ANDROID) || defined(__linux__) || defined(__linux)
-#       define IPC_DECL_EXPORT  __attribute__((visibility("default")))
-#       define IPC_DECL_IMPORT  __attribute__((visibility("default")))
-#   else
-#       define IPC_DECL_EXPORT  __declspec(dllexport)
-#       define IPC_DECL_IMPORT  __declspec(dllimport)
-#   endif
-#elif defined(__GNUC__)
-#   if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
-       defined(WIN64) || defined(_WIN64) || defined(__WIN64__)
-#       define IPC_DECL_EXPORT  __declspec(dllexport)
-#       define IPC_DECL_IMPORT  __declspec(dllimport)
-#   else
-#       define IPC_DECL_EXPORT  __attribute__((visibility("default")))
-#       define IPC_DECL_IMPORT  __attribute__((visibility("default")))
-#   endif
-#else
-#   define IPC_DECL_EXPORT      __attribute__((visibility("default")))
-#   define IPC_DECL_IMPORT      __attribute__((visibility("default")))
-#endif
+# if defined(LIBIPC_CC_MSVC) || defined(LIBIPC_OS_WIN)
+#   define LIBIPC_DECL_EXPORT __declspec(dllexport)
+#   define LIBIPC_DECL_IMPORT __declspec(dllimport)
+# elif defined(LIBIPC_OS_ANDROID) || defined(LIBIPC_OS_LINUX) || defined(LIBIPC_CC_GNUC)
+#   define LIBIPC_DECL_EXPORT __attribute__((visibility("default")))
+#   define LIBIPC_DECL_IMPORT __attribute__((visibility("default")))
+# else
+#   define LIBIPC_DECL_EXPORT __attribute__((visibility("default")))
+#   define LIBIPC_DECL_IMPORT __attribute__((visibility("default")))
+# endif
 
 #endif // defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
 
 /*
- * Define IPC_EXPORT for exporting function & class.
+ * Define LIBIPC_EXPORT for exporting function & class.
 */
-
-#ifndef IPC_EXPORT
-#if defined(LIBIPC_LIBRARY_SHARED_BUILDING__)
-#  define IPC_EXPORT IPC_DECL_EXPORT
-#elif defined(LIBIPC_LIBRARY_SHARED_USING__)
-#  define IPC_EXPORT IPC_DECL_IMPORT
-#else
-#  define IPC_EXPORT
-#endif
-#endif /*IPC_EXPORT*/
+#ifndef LIBIPC_EXPORT
+# if defined(LIBIPC_LIBRARY_SHARED_BUILDING__)
+#   define LIBIPC_EXPORT LIBIPC_DECL_EXPORT
+# elif defined(LIBIPC_LIBRARY_SHARED_USING__)
+#   define LIBIPC_EXPORT LIBIPC_DECL_IMPORT
+# else
+#   define LIBIPC_EXPORT
+# endif
+#endif /*LIBIPC_EXPORT*/
diff --git a/include/libipc/ipc.h b/include/libipc/ipc.h
deleted file mode 100755
index 0b4459f6..00000000
--- a/include/libipc/ipc.h
+++ /dev/null
@@ -1,173 +0,0 @@
-#pragma once
-
-#include <string>
-
-#include "libipc/export.h"
-#include "libipc/def.h"
-#include "libipc/buffer.h"
-#include "libipc/shm.h"
-
-namespace ipc {
-
-using handle_t = void*;
-using buff_t   = buffer;
-
-enum : unsigned {
-    sender,
-    receiver
-};
-
-template <typename Flag>
-struct IPC_EXPORT chan_impl {
-    static bool connect   (ipc::handle_t * ph, char const * name, unsigned mode);
-    static bool reconnect (ipc::handle_t * ph, unsigned mode);
-    static void disconnect(ipc::handle_t h);
-    static void destroy   (ipc::handle_t h);
-
-    static char const * name(ipc::handle_t h);
-
-    static std::size_t recv_count(ipc::handle_t h);
-    static bool wait_for_recv(ipc::handle_t h, std::size_t r_count, std::uint64_t tm);
-
-    static bool   send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm);
-    static buff_t recv(ipc::handle_t h, std::uint64_t tm);
-    static buff_t try_recv(ipc::handle_t h);
-};
-
-template <typename Flag>
-class chan_wrapper {
-private:
-    using detail_t = chan_impl<Flag>;
-
-    ipc::handle_t h_ = nullptr;
-    unsigned mode_   = ipc::sender;
-    bool connected_  = false;
-
-public:
-    chan_wrapper() noexcept = default;
-
-    explicit chan_wrapper(char const * name, unsigned mode = ipc::sender)
-        : connected_{this->connect(name, mode)} {
-    }
-
-    chan_wrapper(chan_wrapper&& rhs) noexcept
-        : chan_wrapper{} {
-        swap(rhs);
-    }
-
-    ~chan_wrapper() {
-        detail_t::destroy(h_);
-    }
-
-    void swap(chan_wrapper& rhs) noexcept {
-        std::swap(h_        , rhs.h_);
-        std::swap(mode_     , rhs.mode_);
-        std::swap(connected_, rhs.connected_);
-    }
-
-    chan_wrapper& operator=(chan_wrapper rhs) noexcept {
-        swap(rhs);
-        return *this;
-    }
-
-    char const * name() const noexcept {
-        return detail_t::name(h_);
-    }
-
-    ipc::handle_t handle() const noexcept {
-        return h_;
-    }
-
-    bool valid() const noexcept {
-        return (handle() != nullptr);
-    }
-
-    unsigned mode() const noexcept {
-        return mode_;
-    }
-
-    chan_wrapper clone() const {
-        return chan_wrapper {name(), mode_};
-    }
-
-    /**
-     * Building handle, then try connecting with name & mode flags.
-    */
-    bool connect(char const * name, unsigned mode = ipc::sender | ipc::receiver) {
-        if (name == nullptr || name[0] == '\0') return false;
-        detail_t::disconnect(h_); // clear old connection
-        return connected_ = detail_t::connect(&h_, name, mode_ = mode);
-    }
-
-    /**
-     * Try connecting with new mode flags.
-    */
-    bool reconnect(unsigned mode) {
-        if (!valid()) return false;
-        if (connected_ && (mode_ == mode)) return true;
-        return connected_ = detail_t::reconnect(&h_, mode_ = mode);
-    }
-
-    void disconnect() {
-        if (!valid()) return;
-        detail_t::disconnect(h_);
-        connected_ = false;
-    }
-
-    std::size_t recv_count() const {
-        return detail_t::recv_count(h_);
-    }
-
-    bool wait_for_recv(std::size_t r_count, std::uint64_t tm = invalid_value) const {
-        return detail_t::wait_for_recv(h_, r_count, tm);
-    }
-
-    static bool wait_for_recv(char const * name, std::size_t r_count, std::uint64_t tm = invalid_value) {
-        return chan_wrapper(name).wait_for_recv(r_count, tm);
-    }
-
-    bool send(void const * data, std::size_t size, std::uint64_t tm = default_timeout) {
-        return detail_t::send(h_, data, size, tm);
-    }
-    bool send(buff_t const & buff, std::uint64_t tm = default_timeout) {
-        return this->send(buff.data(), buff.size(), tm);
-    }
-    bool send(std::string const & str, std::uint64_t tm = default_timeout) {
-        return this->send(str.c_str(), str.size() + 1, tm);
-    }
-
-    buff_t recv(std::uint64_t tm = invalid_value) {
-        return detail_t::recv(h_, tm);
-    }
-    buff_t try_recv() {
-        return detail_t::try_recv(h_);
-    }
-};
-
-template <relat Rp, relat Rc, trans Ts>
-using chan = chan_wrapper<ipc::wr<Rp, Rc, Ts>>;
-
-/**
- * class route
- *
- * You could use one producer/server/sender for sending messages to a route,
- * then all the consumers/clients/receivers which are receiving with this route,
- * would receive your sent messages.
- *
- * A route could only be used in 1 to N
- * (one producer/writer to multi consumers/readers)
-*/
-
-using route = chan<relat::single, relat::multi, trans::broadcast>;
-
-/**
- * class channel
- *
- * You could use multi producers/writers for sending messages to a channel,
- * then all the consumers/readers which are receiving with this channel,
- * would receive your sent messages.
-*/
-
-using channel = chan<relat::multi, relat::multi, trans::broadcast>;
-
-} // namespace ipc
diff --git a/include/libipc/mutex.h b/include/libipc/mutex.h
deleted file mode 100644
index 2d4781ff..00000000
--- a/include/libipc/mutex.h
+++ /dev/null
@@ -1,39 +0,0 @@
-#pragma once
-
-#include <cstdint>  // std::uint64_t
-#include <system_error>
-
-#include "libipc/export.h"
-#include "libipc/def.h"
-
-namespace ipc {
-namespace sync {
-
-class IPC_EXPORT mutex {
-    mutex(mutex const &) = delete;
-    mutex &operator=(mutex const &) = delete;
-
-public:
-    mutex();
-    explicit mutex(char const *name);
-    ~mutex();
-
-    void const *native() const noexcept;
-    void *native() noexcept;
-
-    bool valid() const noexcept;
-
-    bool open(char const *name) noexcept;
-    void close() noexcept;
-
-    bool lock(std::uint64_t tm = ipc::invalid_value) noexcept;
-    bool try_lock() noexcept(false); // std::system_error
-    bool unlock() noexcept;
-
-private:
-    class mutex_;
-    mutex_* p_;
-};
-
-} // namespace sync
-} // namespace ipc
diff --git a/include/libipc/pool_alloc.h b/include/libipc/pool_alloc.h
deleted file mode 100755
index a889be71..00000000
--- a/include/libipc/pool_alloc.h
+++ /dev/null
@@ -1,103 +0,0 @@
-#pragma once
-
-#include <new>
-#include <utility>
-
-#include "libipc/export.h"
-#include "libipc/def.h"
-
-namespace ipc {
-namespace mem {
-
-class IPC_EXPORT pool_alloc {
-public:
-    static void* alloc(std::size_t size);
-    static void  free (void* p, std::size_t size);
-};
-
-////////////////////////////////////////////////////////////////
-/// construct/destruct an object
-////////////////////////////////////////////////////////////////
-
-namespace detail {
-
-template <typename T>
-struct impl {
-    template <typename... P>
-    static T* construct(T* p, P&&... params) {
-        ::new (p) T(std::forward<P>(params)...);
-        return p;
-    }
-
-    static void destruct(T* p) {
-        reinterpret_cast<T*>(p)->~T();
-    }
-};
-
-template <typename T, size_t N>
-struct impl<T[N]> {
-    using type = T[N];
-
-    template <typename... P>
-    static type* construct(type* p, P&&... params) {
-        for (size_t i = 0; i < N; ++i) {
-            impl<T>::construct(&((*p)[i]), std::forward<P>(params)...);
-        }
-        return p;
-    }
-
-    static void destruct(type* p) {
-        for (size_t i = 0; i < N; ++i) {
-            impl<T>::destruct(&((*p)[i]));
-        }
-    }
-};
-
-} // namespace detail
-
-template <typename T, typename... P>
-T* construct(T* p, P&&... params) {
-    return detail::impl<T>::construct(p, std::forward<P>(params)...);
-}
-
-template <typename T, typename... P>
-T* construct(void* p, P&&... params) {
-    return construct(static_cast<T*>(p), std::forward<P>(params)...);
-}
-
-template <typename T>
-void destruct(T* p) {
-    return detail::impl<T>::destruct(p);
-}
-
-template <typename T>
-void destruct(void* p) {
-    destruct(static_cast<T*>(p));
-}
-
-////////////////////////////////////////////////////////////////
-/// general alloc/free
-////////////////////////////////////////////////////////////////
-
-inline void* alloc(std::size_t size) {
-    return pool_alloc::alloc(size);
-}
-
-template <typename T, typename... P>
-T* alloc(P&&... params) {
-    return construct<T>(pool_alloc::alloc(sizeof(T)), std::forward<P>(params)...);
-}
-
-inline void free(void* p, std::size_t size) {
-    pool_alloc::free(p, size);
-}
-
-template <typename T>
-void free(T* p) {
-    if (p == nullptr) return;
-    destruct(p);
-    pool_alloc::free(p, sizeof(T));
-}
-
-} // namespace mem
-} // namespace ipc
diff --git a/include/libipc/rw_lock.h b/include/libipc/rw_lock.h
deleted file mode 100755
index 31ed9de2..00000000
--- a/include/libipc/rw_lock.h
+++ /dev/null
@@ -1,171 +0,0 @@
-#pragma once
-
-#include <atomic>
-#include <thread>
-#include <chrono>
-#include <limits>
-#include <type_traits>
-#include <utility>
-
-////////////////////////////////////////////////////////////////
-/// Gives hint to processor that improves performance of spin-wait loops.
-////////////////////////////////////////////////////////////////
-
-#pragma push_macro("IPC_LOCK_PAUSE_")
-#undef  IPC_LOCK_PAUSE_
-
-#if defined(_MSC_VER)
-#include <windows.h>    // YieldProcessor
-/*
-    See: http://msdn.microsoft.com/en-us/library/windows/desktop/ms687419(v=vs.85).aspx
-    Not for intel c++ compiler, so ignore http://software.intel.com/en-us/forums/topic/296168
-*/
-#   define IPC_LOCK_PAUSE_() YieldProcessor()
-#elif defined(__GNUC__)
-#if defined(__i386__) || defined(__x86_64__)
-/*
-    See: Intel(R) 64 and IA-32 Architectures Software Developer's Manual V2
-         PAUSE-Spin Loop Hint, 4-57
-         http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.html?wapkw=instruction+set+reference
-*/
-#   define IPC_LOCK_PAUSE_() __asm__ __volatile__("pause")
-#elif defined(__ia64__) || defined(__ia64)
-/*
-    See: Intel(R) Itanium(R) Architecture Developer's Manual, Vol.3
-         hint - Performance Hint, 3:145
-         http://www.intel.com/content/www/us/en/processors/itanium/itanium-architecture-vol-3-manual.html
-*/
-#   define IPC_LOCK_PAUSE_() __asm__ __volatile__ ("hint @pause")
-#elif defined(__arm__)
-/*
-    See: ARM Architecture Reference Manuals (YIELD)
-         http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html
-*/
-#   define IPC_LOCK_PAUSE_() __asm__ __volatile__ ("yield")
-#endif
-#endif/*compilers*/
-
-#if !defined(IPC_LOCK_PAUSE_)
-/*
-    Just use a compiler fence, prevent compiler from optimizing loop
-*/
-#   define IPC_LOCK_PAUSE_() std::atomic_signal_fence(std::memory_order_seq_cst)
-#endif/*!defined(IPC_LOCK_PAUSE_)*/
-
-////////////////////////////////////////////////////////////////
-/// Yield to other threads
-////////////////////////////////////////////////////////////////
-
-namespace ipc {
-
-template <typename K>
-inline void yield(K& k) noexcept {
-    if (k < 4)  { /* Do nothing */ }
-    else
-    if (k < 16) { IPC_LOCK_PAUSE_(); }
-    else
-    if (k < 32) { std::this_thread::yield(); }
-    else {
-        std::this_thread::sleep_for(std::chrono::milliseconds(1));
-        return;
-    }
-    ++k;
-}
-
-template <std::size_t N = 32, typename K, typename F>
-inline void sleep(K& k, F&& f) {
-    if (k < static_cast<K>(N)) {
-        std::this_thread::yield();
-    }
-    else {
-        static_cast<void>(std::forward<F>(f)());
-        return;
-    }
-    ++k;
-}
-
-template <std::size_t N = 32, typename K>
-inline void sleep(K& k) {
-    sleep<N>(k, [] {
-        std::this_thread::sleep_for(std::chrono::milliseconds(1));
-    });
-}
-
-} // namespace ipc
-
-#pragma pop_macro("IPC_LOCK_PAUSE_")
-
-namespace ipc {
-
-class spin_lock {
-    std::atomic<unsigned> lc_ { 0 };
-
-public:
-    void lock(void) noexcept {
-        for (unsigned k = 0;
-             lc_.exchange(1, std::memory_order_acquire);
-             yield(k)) ;
-    }
-
-    void unlock(void) noexcept {
-        lc_.store(0, std::memory_order_release);
-    }
-};
-
-class rw_lock {
-    using lc_ui_t = unsigned;
-
-    std::atomic<lc_ui_t> lc_ { 0 };
-
-    enum : lc_ui_t {
-        w_mask = (std::numeric_limits<std::make_signed_t<lc_ui_t>>::max)(), // b 0111 1111
-        w_flag = w_mask + 1                                                 // b 1000 0000
-    };
-
-public:
-    rw_lock() = default;
-
-    rw_lock(const rw_lock&) = delete;
-    rw_lock& operator=(const rw_lock&) = delete;
-    rw_lock(rw_lock&&) = delete;
-    rw_lock& operator=(rw_lock&&) = delete;
-
-    void lock() noexcept {
-        for (unsigned k = 0;;) {
-            auto old = lc_.fetch_or(w_flag, std::memory_order_acq_rel);
-            if (!old) return;           // got w-lock
-            if (!(old & w_flag)) break; // other thread having r-lock
-            yield(k);                   // other thread having w-lock
-        }
-        // wait for reading finished
-        for (unsigned k = 0;
-             lc_.load(std::memory_order_acquire) & w_mask;
-             yield(k)) ;
-    }
-
-    void unlock() noexcept {
-        lc_.store(0, std::memory_order_release);
-    }
-
-    void lock_shared() noexcept {
-        auto old = lc_.load(std::memory_order_acquire);
-        for (unsigned k = 0;;) {
-            // if w_flag set, just continue
-            if (old & w_flag) {
-                yield(k);
-                old = lc_.load(std::memory_order_acquire);
-            }
-            // otherwise try cas lc + 1 (set r-lock)
-            else if (lc_.compare_exchange_weak(old, old + 1, std::memory_order_release)) {
-                return;
-            }
-            // set r-lock failed, old has been updated
-        }
-    }
-
-    void unlock_shared() noexcept {
-        lc_.fetch_sub(1, std::memory_order_release);
-    }
-};
-
-} // namespace ipc
diff --git a/include/libipc/semaphore.h b/include/libipc/semaphore.h
deleted file mode 100644
index 7f557e2f..00000000
--- a/include/libipc/semaphore.h
+++ /dev/null
@@ -1,37 +0,0 @@
-#pragma once
-
-#include <cstdint>  // std::uint64_t
-
-#include "libipc/export.h"
-#include "libipc/def.h"
-
-namespace ipc {
-namespace sync {
-
-class IPC_EXPORT semaphore {
-    semaphore(semaphore const &) = delete;
-    semaphore &operator=(semaphore const &) = delete;
-
-public:
-    semaphore();
-    explicit semaphore(char const *name, std::uint32_t count = 0);
-    ~semaphore();
-
-    void const *native() const noexcept;
-    void *native() noexcept;
-
-    bool valid() const noexcept;
-
-    bool open(char const *name, std::uint32_t count = 0) noexcept;
-    void close() noexcept;
-
-    bool wait(std::uint64_t tm = ipc::invalid_value) noexcept;
-    bool post(std::uint32_t count = 1) noexcept;
-
-private:
-    class semaphore_;
-    semaphore_* p_;
-};
-
-} // namespace sync
-} // namespace ipc
diff --git a/include/libipc/shm.h b/include/libipc/shm.h
deleted file mode 100755
index 12e32237..00000000
--- a/include/libipc/shm.h
+++ /dev/null
@@ -1,59 +0,0 @@
-#pragma once
-
-#include <cstddef>
-#include <cstdint>
-
-#include "libipc/export.h"
-
-namespace ipc {
-namespace shm {
-
-using id_t = void*;
-
-enum : unsigned {
-    create = 0x01,
-    open   = 0x02
-};
-
-IPC_EXPORT id_t         acquire(char const * name, std::size_t size, unsigned mode = create | open);
-IPC_EXPORT void *       get_mem(id_t id, std::size_t * size);
-IPC_EXPORT std::int32_t release(id_t id);
-IPC_EXPORT void         remove (id_t id);
-IPC_EXPORT void         remove (char const * name);
-
-IPC_EXPORT std::int32_t get_ref(id_t id);
-IPC_EXPORT void sub_ref(id_t id);
-
-class IPC_EXPORT handle {
-public:
-    handle();
-    handle(char const * name, std::size_t size, unsigned mode = create | open);
-    handle(handle&& rhs);
-
-    ~handle();
-
-    void swap(handle& rhs);
-    handle& operator=(handle rhs);
-
-    bool         valid() const noexcept;
-    std::size_t  size () const noexcept;
-    char const * name () const noexcept;
-
-    std::int32_t ref() const noexcept;
-    void sub_ref() noexcept;
-
-    bool acquire(char const * name, std::size_t size, unsigned mode = create | open);
-    std::int32_t release();
-
-    void* get() const;
-
-    void attach(id_t);
-    id_t detach();
-
-private:
-    class handle_;
-    handle_* p_;
-};
-
-} // namespace shm
-} // namespace ipc
diff --git a/include/libipc/spin_lock.h b/include/libipc/spin_lock.h
new file mode 100644
index 00000000..49c4acd2
--- /dev/null
+++ b/include/libipc/spin_lock.h
@@ -0,0 +1,179 @@
+/**
+ * @file spin_lock.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define spin locks
+ * @date 2022-02-27
+ */
+#pragma once
+
+#include <atomic>
+#include <thread>
+#include <chrono>
+#include <limits>
+#include <type_traits>
+#include <utility>
+
+#include "libipc/detect_plat.h"
+#include "libipc/def.h"
+
+////////////////////////////////////////////////////////////////
+/// Gives hint to processor that improves performance of spin-wait loops.
+////////////////////////////////////////////////////////////////
+
+#pragma push_macro("LIBIPC_LOCK_PAUSE_")
+#undef LIBIPC_LOCK_PAUSE_
+
+#if defined(LIBIPC_CC_MSVC)
+# include <Windows.h>   // YieldProcessor
+/*
+ *  @see http://msdn.microsoft.com/en-us/library/windows/desktop/ms687419(v=vs.85).aspx
+ *       Not for intel c++ compiler, so ignore http://software.intel.com/en-us/forums/topic/296168
+*/
+# define LIBIPC_LOCK_PAUSE_() YieldProcessor()
+#elif defined(LIBIPC_CC_GNUC)
+# if defined(LIBIPC_INSTR_X86_64)
+/*
+ *  @see Intel(R) 64 and IA-32 Architectures Software Developer's Manual V2
+ *       PAUSE-Spin Loop Hint, 4-57
+ *       http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.html?wapkw=instruction+set+reference
+*/
+#   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__("pause")
+# elif defined(LIBIPC_INSTR_I64)
+/*
+ *  @see Intel(R) Itanium(R) Architecture Developer's Manual, Vol.3
+ *       hint - Performance Hint, 3:145
+ *       http://www.intel.com/content/www/us/en/processors/itanium/itanium-architecture-vol-3-manual.html
+*/
+#   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__ ("hint @pause")
+#elif defined(LIBIPC_INSTR_ARM)
+/*
+ *  @see ARM Architecture Reference Manuals (YIELD)
+ *       http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html
+*/
+#   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__ ("yield")
+# endif
+#endif /*compilers*/
+
+#if !defined(LIBIPC_LOCK_PAUSE_)
+/*
+ *  Just use a compiler fence, prevent compiler from optimizing loop
+*/
+# define LIBIPC_LOCK_PAUSE_() std::atomic_signal_fence(std::memory_order_seq_cst)
+#endif /*!defined(LIBIPC_LOCK_PAUSE_)*/
+
+////////////////////////////////////////////////////////////////
+/// Yield to other threads
+////////////////////////////////////////////////////////////////
+
+LIBIPC_NAMESPACE_BEG_
+
+template <typename K>
+inline void yield(K &k) noexcept {
+  if (k < 4)  { /* Do nothing */ }
+  else
+  if (k < 16) { LIBIPC_LOCK_PAUSE_(); }
+  else
+  if (k < 32) { std::this_thread::yield(); }
+  else {
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+    return;
+  }
+  ++k;
+}
+
+template <std::size_t N = 32, typename K, typename F>
+inline void sleep(K &k, F &&f) {
+  if (k < static_cast<K>(N)) {
+    std::this_thread::yield();
+  }
+  else {
+    static_cast<void>(std::forward<F>(f)());
+    return;
+  }
+  ++k;
+}
+
+template <std::size_t N = 32, typename K>
+inline void sleep(K &k) {
+  sleep<N>(k, [] {
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  });
+}
+
+} // namespace ipc
+
+#pragma pop_macro("LIBIPC_LOCK_PAUSE_")
+
+namespace ipc {
+
+class spin_lock {
+  std::atomic<unsigned> lc_ { 0 };
+
+public:
+  void lock(void) noexcept {
+    for (unsigned k = 0;
+      lc_.exchange(1, std::memory_order_acquire);
+      yield(k)) ;
+  }
+  void unlock(void) noexcept {
+    lc_.store(0, std::memory_order_release);
+  }
+};
+
+class rw_lock {
+  using lc_ui_t = unsigned;
+
+  std::atomic<lc_ui_t> lc_ { 0 };
+
+  enum : lc_ui_t {
+    w_mask = (std::numeric_limits<std::make_signed_t<lc_ui_t>>::max)(), // b 0111 1111
+    w_flag = w_mask + 1                                                 // b 1000 0000
+  };
+
+public:
+  rw_lock() = default;
+
+  rw_lock(const rw_lock &) = delete;
+  rw_lock &operator=(const rw_lock &) = delete;
+  rw_lock(rw_lock &&) = delete;
+  rw_lock &operator=(rw_lock &&) = delete;
+
+  void lock() noexcept {
+    for (unsigned k = 0;;) {
+      auto old = lc_.fetch_or(w_flag, std::memory_order_acq_rel);
+      if (!old) return;           // got w-lock
+      if (!(old & w_flag)) break; // other thread having r-lock
+      yield(k);                   // other thread having w-lock
+    }
+    // wait for reading finished
+    for (unsigned k = 0;
+         lc_.load(std::memory_order_acquire) & w_mask;
+         yield(k)) ;
+  }
+
+  void unlock() noexcept {
+    lc_.store(0, std::memory_order_release);
+  }
+
+  void lock_shared() noexcept {
+    auto old = lc_.load(std::memory_order_acquire);
+    for (unsigned k = 0;;) {
+      // if w_flag set, just continue
+      if (old & w_flag) {
+        yield(k);
+        old = lc_.load(std::memory_order_acquire);
+      }
+      // otherwise try cas lc + 1 (set r-lock)
+      else if (lc_.compare_exchange_weak(old, old + 1, std::memory_order_release)) {
+        return;
+      }
+      // set r-lock failed, old has been updated
+    }
+  }
+
+  void unlock_shared() noexcept {
+    lc_.fetch_sub(1, std::memory_order_release);
+  }
+};
+
+LIBIPC_NAMESPACE_END_
diff --git a/performance.xlsx b/performance.xlsx
deleted file mode 100644
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diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index e1f439fe..37efae1c 100755
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,17 +1,9 @@
 project(ipc)
 
 aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libipc SRC_FILES)
-aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libipc/sync SRC_FILES)
-aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libipc/platform SRC_FILES)
 
 file(GLOB HEAD_FILES
-  ${LIBIPC_PROJECT_DIR}/include/libipc/*.h
-  ${LIBIPC_PROJECT_DIR}/src/libipc/*.h
-  ${LIBIPC_PROJECT_DIR}/src/libipc/*.inc
-  ${LIBIPC_PROJECT_DIR}/src/libipc/circ/*.h
-  ${LIBIPC_PROJECT_DIR}/src/libipc/memory/*.h
-  ${LIBIPC_PROJECT_DIR}/src/libipc/platform/*.h
-  ${LIBIPC_PROJECT_DIR}/src/libipc/utility/*.h)
+  ${LIBIPC_PROJECT_DIR}/include/libipc/*.h)
 
 if (LIBIPC_BUILD_SHARED_LIBS)
   add_library(${PROJECT_NAME} SHARED ${SRC_FILES} ${HEAD_FILES})
@@ -33,14 +25,13 @@ set_target_properties(${PROJECT_NAME}
 
 # set version
 set_target_properties(${PROJECT_NAME}
-    PROPERTIES
-    VERSION 1.2.0
-    SOVERSION 3)
+  PROPERTIES
+  VERSION 2.0.0
+  SOVERSION 4)
 
 target_include_directories(${PROJECT_NAME}
   PUBLIC  ${LIBIPC_PROJECT_DIR}/include
-  PRIVATE ${LIBIPC_PROJECT_DIR}/src
-          $<$<BOOL:UNIX>:${LIBIPC_PROJECT_DIR}/src/libipc/platform/linux>)
+  PRIVATE ${LIBIPC_PROJECT_DIR}/src)
 
 if(NOT MSVC)
   target_link_libraries(${PROJECT_NAME} PUBLIC
diff --git a/src/libipc/buffer.cpp b/src/libipc/buffer.cpp
deleted file mode 100755
index 084b8153..00000000
--- a/src/libipc/buffer.cpp
+++ /dev/null
@@ -1,87 +0,0 @@
-#include "libipc/buffer.h"
-#include "libipc/utility/pimpl.h"
-
-#include <cstring>
-
-namespace ipc {
-
-bool operator==(buffer const & b1, buffer const & b2) {
-    return (b1.size() == b2.size()) && (std::memcmp(b1.data(), b2.data(), b1.size()) == 0);
-}
-
-bool operator!=(buffer const & b1, buffer const & b2) {
-    return !(b1 == b2);
-}
-
-class buffer::buffer_ : public pimpl<buffer_> {
-public:
-    void*       p_;
-    std::size_t s_;
-    void*       a_;
-    buffer::destructor_t d_;
-
-    buffer_(void* p, std::size_t s, buffer::destructor_t d, void* a)
-        : p_(p), s_(s), a_(a), d_(d) {
-    }
-
-    ~buffer_() {
-        if (d_ == nullptr) return;
-        d_((a_ == nullptr) ? p_ : a_, s_);
-    }
-};
-
-buffer::buffer()
-    : buffer(nullptr, 0, nullptr, nullptr) {
-}
-
-buffer::buffer(void* p, std::size_t s, destructor_t d)
-    : p_(p_->make(p, s, d, nullptr)) {
-}
-
-buffer::buffer(void* p, std::size_t s, destructor_t d, void* additional)
-    : p_(p_->make(p, s, d, additional)) {
-}
-
-buffer::buffer(void* p, std::size_t s)
-    : buffer(p, s, nullptr) {
-}
-
-buffer::buffer(char const & c)
-    : buffer(const_cast<char*>(&c), 1) {
-}
-
-buffer::buffer(buffer&& rhs)
-    : buffer() {
-    swap(rhs);
-}
-
-buffer::~buffer() {
-    p_->clear();
-}
-
-void buffer::swap(buffer& rhs) {
-    std::swap(p_, rhs.p_);
-}
-
-buffer& buffer::operator=(buffer rhs) {
-    swap(rhs);
-    return *this;
-}
-
-bool buffer::empty() const noexcept {
-    return (impl(p_)->p_ == nullptr) || (impl(p_)->s_ == 0);
-}
-
-void* buffer::data() noexcept {
-    return impl(p_)->p_;
-}
-
-void const * buffer::data() const noexcept {
-    return impl(p_)->p_;
-}
-
-std::size_t buffer::size() const noexcept {
-    return impl(p_)->s_;
-}
-
-} // namespace ipc
diff --git a/src/libipc/circ/elem_array.h b/src/libipc/circ/elem_array.h
deleted file mode 100755
index 5febcba3..00000000
--- a/src/libipc/circ/elem_array.h
+++ /dev/null
@@ -1,136 +0,0 @@
-#pragma once
-
-#include <atomic>   // std::atomic<?>
-#include <limits>
-#include <utility>
-#include <type_traits>
-
-#include "libipc/def.h"
-#include "libipc/rw_lock.h"
-
-#include "libipc/circ/elem_def.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace circ {
-
-template <typename Policy,
-          std::size_t DataSize,
-          std::size_t AlignSize = (ipc::detail::min)(DataSize, alignof(std::max_align_t))>
-class elem_array : public ipc::circ::conn_head<Policy> {
-public:
-    using base_t   = ipc::circ::conn_head<Policy>;
-    using policy_t = Policy;
-    using cursor_t = decltype(std::declval<policy_t>().cursor());
-    using elem_t   = typename policy_t::template elem_t<DataSize, AlignSize>;
-
-    enum : std::size_t {
-        head_size  = sizeof(base_t) + sizeof(policy_t),
-        data_size  = DataSize,
-        elem_max   = (std::numeric_limits<uint_t<8>>::max)() + 1, // default is 255 + 1
-        elem_size  = sizeof(elem_t),
-        block_size = elem_size * elem_max
-    };
-
-private:
-    policy_t head_;
-    elem_t   block_[elem_max] {};
-
-    /**
-     * @remarks 'warning C4348: redefinition of default parameter' with MSVC.
-     * @see
-     *  - https://stackoverflow.com/questions/12656239/redefinition-of-default-template-parameter
-     *  - https://developercommunity.visualstudio.com/content/problem/425978/incorrect-c4348-warning-in-nested-template-declara.html
-    */
-    template <typename P, bool/* = relat_trait<P>::is_multi_producer*/>
-    struct sender_checker;
-
-    template <typename P>
-    struct sender_checker<P, true> {
-        constexpr static bool connect() noexcept {
-            // always return true
-            return true;
-        }
-        constexpr static void disconnect() noexcept {}
-    };
-
-    template <typename P>
-    struct sender_checker<P, false> {
-        bool connect() noexcept {
-            return !flag_.test_and_set(std::memory_order_acq_rel);
-        }
-        void disconnect() noexcept {
-            flag_.clear();
-        }
-
-    private:
-        // in shm, it should be 0 whether it's initialized or not.
-        std::atomic_flag flag_ = ATOMIC_FLAG_INIT;
-    };
-
-    template <typename P, bool/* = relat_trait<P>::is_multi_consumer*/>
-    struct receiver_checker;
-
-    template <typename P>
-    struct receiver_checker<P, true> {
-        constexpr static cc_t connect(base_t &conn) noexcept {
-            return conn.connect();
-        }
-        constexpr static cc_t disconnect(base_t &conn, cc_t cc_id) noexcept {
-            return conn.disconnect(cc_id);
-        }
-    };
-
-    template <typename P>
-    struct receiver_checker<P, false> : protected sender_checker<P, false> {
-        cc_t connect(base_t &conn) noexcept {
-            return sender_checker<P, false>::connect() ? conn.connect() : 0;
-        }
-        cc_t disconnect(base_t &conn, cc_t cc_id) noexcept {
-            sender_checker<P, false>::disconnect();
-            return conn.disconnect(cc_id);
-        }
-    };
-
-    sender_checker  <policy_t, relat_trait<policy_t>::is_multi_producer> s_ckr_;
-    receiver_checker<policy_t, relat_trait<policy_t>::is_multi_consumer> r_ckr_;
-
-    // make these be private
-    using base_t::connect;
-    using base_t::disconnect;
-
-public:
-    bool connect_sender() noexcept {
-        return s_ckr_.connect();
-    }
-
-    void disconnect_sender() noexcept {
-        return s_ckr_.disconnect();
-    }
-
-    cc_t connect_receiver() noexcept {
-        return r_ckr_.connect(*this);
-    }
-
-    cc_t disconnect_receiver(cc_t cc_id) noexcept {
-        return r_ckr_.disconnect(*this, cc_id);
-    }
-
-    cursor_t cursor() const noexcept {
-        return head_.cursor();
-    }
-
-    template <typename F>
-    bool push(F&& f) {
-        return head_.push(std::forward<F>(f), block_);
-    }
-
-    template <typename F>
-    bool pop(cursor_t* cur, F&& f) {
-        if (cur == nullptr) return false;
-        return head_.pop(*cur, std::forward<F>(f), block_);
-    }
-};
-
-} // namespace circ
-} // namespace ipc
diff --git a/src/libipc/circ/elem_def.h b/src/libipc/circ/elem_def.h
deleted file mode 100755
index e14ef01a..00000000
--- a/src/libipc/circ/elem_def.h
+++ /dev/null
@@ -1,77 +0,0 @@
-#pragma once
-
-#include <atomic>
-#include <cstddef>
-#include <cstdint>
-#include <new>
-
-#include "libipc/def.h"
-#include "libipc/rw_lock.h"
-
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace circ {
-
-using u1_t = ipc::uint_t<8>;
-using u2_t = ipc::uint_t<32>;
-
-/** only supports max 32 connections in broadcast mode */
-using cc_t = u2_t;
-
-constexpr u1_t index_of(u2_t c) noexcept {
-    return static_cast<u1_t>(c);
-}
-
-class conn_head_base {
-protected:
-    std::atomic<cc_t> cc_{0}; // connections
-    ipc::spin_lock lc_;
-    std::atomic<bool> constructed_{false};
-
-public:
-    void init() {
-        /* DCLP */
-        if (!constructed_.load(std::memory_order_acquire)) {
-            IPC_UNUSED_ auto guard = ipc::detail::unique_lock(lc_);
-            if (!constructed_.load(std::memory_order_relaxed)) {
-                ::new (this) conn_head_base;
-                constructed_.store(true, std::memory_order_release);
-            }
-        }
-    }
-
-    conn_head_base() = default;
-    conn_head_base(conn_head_base const &) = delete;
-    conn_head_base &operator=(conn_head_base const &) = delete;
-
-    cc_t connections(std::memory_order order = std::memory_order_acquire) const noexcept {
-        return this->cc_.load(order);
-    }
-};
-
-template <typename P>
-class conn_head : public conn_head_base {
-public:
-    cc_t connect() noexcept {
-        return this->cc_.fetch_add(1, std::memory_order_relaxed) + 1;
-    }
-
-    cc_t disconnect(cc_t cc_id) noexcept {
-        if (cc_id == ~static_cast<circ::cc_t>(0u)) {
-            // clear all connections
-            this->cc_.store(0, std::memory_order_relaxed);
-            return 0u;
-        }
-        else {
-            return this->cc_.fetch_sub(1, std::memory_order_relaxed) - 1;
-        }
-    }
-
-    std::size_t conn_count(std::memory_order order = std::memory_order_acquire) const noexcept {
-        return this->connections(order);
-    }
-};
-
-} // namespace circ
-} // namespace ipc
diff --git a/src/libipc/ipc.cpp b/src/libipc/ipc.cpp
index 58d7979f..c7f4a864 100755
--- a/src/libipc/ipc.cpp
+++ b/src/libipc/ipc.cpp
@@ -1,669 +1,2 @@
 
-#include <type_traits>
-#include <cstring>
-#include <algorithm>
-#include <utility>          // std::pair, std::move, std::forward
-#include <atomic>
-#include <type_traits>      // aligned_storage_t
-#include <string>
-#include <vector>
-#include <array>
-#include <cassert>
-
-#include "libipc/ipc.h"
-#include "libipc/def.h"
-#include "libipc/shm.h"
-#include "libipc/pool_alloc.h"
-#include "libipc/queue.h"
-#include "libipc/policy.h"
-#include "libipc/rw_lock.h"
-#include "libipc/waiter.h"
-
-#include "libipc/utility/log.h"
-#include "libipc/utility/id_pool.h"
-#include "libipc/utility/scope_guard.h"
-#include "libipc/utility/utility.h"
-
-#include "libipc/memory/resource.h"
-#include "libipc/platform/detail.h"
-#include "libipc/circ/elem_array.h"
-
-namespace {
-
-using msg_id_t = std::uint32_t;
-using acc_t    = std::atomic<msg_id_t>;
-
-template <std::size_t DataSize, std::size_t AlignSize>
-struct msg_t;
-
-template <std::size_t AlignSize>
-struct msg_t<0, AlignSize> {
-    msg_id_t     cc_id_;
-    msg_id_t     id_;
-    std::int32_t remain_;
-    bool         storage_;
-};
-
-template <std::size_t DataSize, std::size_t AlignSize>
-struct msg_t : msg_t<0, AlignSize> {
-    std::aligned_storage_t<DataSize, AlignSize> data_ {};
-
-    msg_t() = default;
-    msg_t(msg_id_t cc_id, msg_id_t id, std::int32_t remain, void const * data, std::size_t size)
-        : msg_t<0, AlignSize> {cc_id, id, remain, (data == nullptr) || (size == 0)} {
-        if (this->storage_) {
-            if (data != nullptr) {
-                // copy storage-id
-                *reinterpret_cast<ipc::storage_id_t*>(&data_) =
-                     *static_cast<ipc::storage_id_t const *>(data);
-            }
-        }
-        else std::memcpy(&data_, data, size);
-    }
-};
-
-template <typename T>
-ipc::buff_t make_cache(T& data, std::size_t size) {
-    auto ptr = ipc::mem::alloc(size);
-    std::memcpy(ptr, &data, (ipc::detail::min)(sizeof(data), size));
-    return { ptr, size, ipc::mem::free };
-}
-
-struct cache_t {
-    std::size_t fill_;
-    ipc::buff_t buff_;
-
-    cache_t(std::size_t f, ipc::buff_t && b)
-        : fill_(f), buff_(std::move(b))
-    {}
-
-    void append(void const * data, std::size_t size) {
-        if (fill_ >= buff_.size() || data == nullptr || size == 0) return;
-        auto new_fill = (ipc::detail::min)(fill_ + size, buff_.size());
-        std::memcpy(static_cast<ipc::byte_t*>(buff_.data()) + fill_, data, new_fill - fill_);
-        fill_ = new_fill;
-    }
-};
-
-auto cc_acc() {
-    static ipc::shm::handle acc_h("__CA_CONN__", sizeof(acc_t));
-    return static_cast<acc_t*>(acc_h.get());
-}
-
-IPC_CONSTEXPR_ std::size_t align_chunk_size(std::size_t size) noexcept {
-    return (((size - 1) / ipc::large_msg_align) + 1) * ipc::large_msg_align;
-}
-
-IPC_CONSTEXPR_ std::size_t calc_chunk_size(std::size_t size) noexcept {
-    return ipc::make_align(alignof(std::max_align_t), align_chunk_size(
-           ipc::make_align(alignof(std::max_align_t), sizeof(std::atomic<ipc::circ::cc_t>)) + size));
-}
-
-struct chunk_t {
-    std::atomic<ipc::circ::cc_t> &conns() noexcept {
-        return *reinterpret_cast<std::atomic<ipc::circ::cc_t> *>(this);
-    }
-
-    void *data() noexcept {
-        return reinterpret_cast<ipc::byte_t *>(this)
-             + ipc::make_align(alignof(std::max_align_t), sizeof(std::atomic<ipc::circ::cc_t>));
-    }
-};
-
-struct chunk_info_t {
-    ipc::id_pool<> pool_;
-    ipc::spin_lock lock_;
-
-    IPC_CONSTEXPR_ static std::size_t chunks_mem_size(std::size_t chunk_size) noexcept {
-        return ipc::id_pool<>::max_count * chunk_size;
-    }
-
-    ipc::byte_t *chunks_mem() noexcept {
-        return reinterpret_cast<ipc::byte_t *>(this + 1);
-    }
-
-    chunk_t *at(std::size_t chunk_size, ipc::storage_id_t id) noexcept {
-        if (id < 0) return nullptr;
-        return reinterpret_cast<chunk_t *>(chunks_mem() + (chunk_size * id));
-    }
-};
-
-auto& chunk_storages() {
-    class chunk_handle_t {
-        ipc::shm::handle handle_;
-
-    public:
-        chunk_info_t *get_info(std::size_t chunk_size) {
-            if (!handle_.valid() &&
-                !handle_.acquire( ("__CHUNK_INFO__" + ipc::to_string(chunk_size)).c_str(), 
-                                  sizeof(chunk_info_t) + chunk_info_t::chunks_mem_size(chunk_size) )) {
-                ipc::error("[chunk_storages] chunk_shm.id_info_.acquire failed: chunk_size = %zd\n", chunk_size);
-                return nullptr;
-            }
-            auto info = static_cast<chunk_info_t*>(handle_.get());
-            if (info == nullptr) {
-                ipc::error("[chunk_storages] chunk_shm.id_info_.get failed: chunk_size = %zd\n", chunk_size);
-                return nullptr;
-            }
-            return info;
-        }
-    };
-    static ipc::map<std::size_t, chunk_handle_t> chunk_hs;
-    return chunk_hs;
-}
-
-chunk_info_t *chunk_storage_info(std::size_t chunk_size) {
-    auto &storages = chunk_storages();
-    std::decay_t<decltype(storages)>::iterator it;
-    {
-        static ipc::rw_lock lock;
-        IPC_UNUSED_ std::shared_lock<ipc::rw_lock> guard {lock};
-        if ((it = storages.find(chunk_size)) == storages.end()) {
-            using chunk_handle_t = std::decay_t<decltype(storages)>::value_type::second_type;
-            guard.unlock();
-            IPC_UNUSED_ std::lock_guard<ipc::rw_lock> guard {lock};
-            it = storages.emplace(chunk_size, chunk_handle_t{}).first;
-        }
-    }
-    return it->second.get_info(chunk_size);
-}
-
-std::pair<ipc::storage_id_t, void*> acquire_storage(std::size_t size, ipc::circ::cc_t conns) {
-    std::size_t chunk_size = calc_chunk_size(size);
-    auto info = chunk_storage_info(chunk_size);
-    if (info == nullptr) return {};
-
-    info->lock_.lock();
-    info->pool_.prepare();
-    // got an unique id
-    auto id = info->pool_.acquire();
-    info->lock_.unlock();
-
-    auto chunk = info->at(chunk_size, id);
-    if (chunk == nullptr) return {};
-    chunk->conns().store(conns, std::memory_order_relaxed);
-    return { id, chunk->data() };
-}
-
-void *find_storage(ipc::storage_id_t id, std::size_t size) {
-    if (id < 0) {
-        ipc::error("[find_storage] id is invalid: id = %ld, size = %zd\n", (long)id, size);
-        return nullptr;
-    }
-    std::size_t chunk_size = calc_chunk_size(size);
-    auto info = chunk_storage_info(chunk_size);
-    if (info == nullptr) return nullptr;
-    return info->at(chunk_size, id)->data();
-}
-
-void release_storage(ipc::storage_id_t id, std::size_t size) {
-    if (id < 0) {
-        ipc::error("[release_storage] id is invalid: id = %ld, size = %zd\n", (long)id, size);
-        return;
-    }
-    std::size_t chunk_size = calc_chunk_size(size);
-    auto info = chunk_storage_info(chunk_size);
-    if (info == nullptr) return;
-    info->lock_.lock();
-    info->pool_.release(id);
-    info->lock_.unlock();
-}
-
-template <ipc::relat Rp, ipc::relat Rc>
-bool sub_rc(ipc::wr<Rp, Rc, ipc::trans::unicast>, 
-            std::atomic<ipc::circ::cc_t> &/*conns*/, ipc::circ::cc_t /*curr_conns*/, ipc::circ::cc_t /*conn_id*/) noexcept {
-    return true;
-}
-
-template <ipc::relat Rp, ipc::relat Rc>
-bool sub_rc(ipc::wr<Rp, Rc, ipc::trans::broadcast>, 
-            std::atomic<ipc::circ::cc_t> &conns, ipc::circ::cc_t curr_conns, ipc::circ::cc_t conn_id) noexcept {
-    auto last_conns = curr_conns & ~conn_id;
-    for (unsigned k = 0;;) {
-        auto chunk_conns  = conns.load(std::memory_order_acquire);
-        if (conns.compare_exchange_weak(chunk_conns, chunk_conns & last_conns, std::memory_order_release)) {
-            return (chunk_conns & last_conns) == 0;
-        }
-        ipc::yield(k);
-    }
-}
-
-template <typename Flag>
-void recycle_storage(ipc::storage_id_t id, std::size_t size, ipc::circ::cc_t curr_conns, ipc::circ::cc_t conn_id) {
-    if (id < 0) {
-        ipc::error("[recycle_storage] id is invalid: id = %ld, size = %zd\n", (long)id, size);
-        return;
-    }
-    std::size_t chunk_size = calc_chunk_size(size);
-    auto info = chunk_storage_info(chunk_size);
-    if (info == nullptr) return;
-
-    auto chunk = info->at(chunk_size, id);
-    if (chunk == nullptr) return;
-
-    if (!sub_rc(Flag{}, chunk->conns(), curr_conns, conn_id)) {
-        return;
-    }
-    info->lock_.lock();
-    info->pool_.release(id);
-    info->lock_.unlock();
-}
-
-template <typename MsgT>
-bool clear_message(void* p) {
-    auto msg = static_cast<MsgT*>(p);
-    if (msg->storage_) {
-        std::int32_t r_size = static_cast<std::int32_t>(ipc::data_length) + msg->remain_;
-        if (r_size <= 0) {
-            ipc::error("[clear_message] invalid msg size: %d\n", (int)r_size);
-            return true;
-        }
-        release_storage(
-            *reinterpret_cast<ipc::storage_id_t*>(&msg->data_),
-            static_cast<std::size_t>(r_size));
-    }
-    return true;
-}
-
-struct conn_info_head {
-
-    ipc::string name_;
-    msg_id_t    cc_id_; // connection-info id
-    ipc::detail::waiter cc_waiter_, wt_waiter_, rd_waiter_;
-    ipc::shm::handle acc_h_;
-
-    conn_info_head(char const * name)
-        : name_     {name}
-        , cc_id_    {(cc_acc() == nullptr) ? 0 : cc_acc()->fetch_add(1, std::memory_order_relaxed)}
-        , cc_waiter_{("__CC_CONN__" + name_).c_str()}
-        , wt_waiter_{("__WT_CONN__" + name_).c_str()}
-        , rd_waiter_{("__RD_CONN__" + name_).c_str()}
-        , acc_h_    {("__AC_CONN__" + name_).c_str(), sizeof(acc_t)} {
-    }
-
-    void quit_waiting() {
-        cc_waiter_.quit_waiting();
-        wt_waiter_.quit_waiting();
-        rd_waiter_.quit_waiting();
-    }
-
-    auto acc() {
-        return static_cast<acc_t*>(acc_h_.get());
-    }
-
-    auto& recv_cache() {
-        thread_local ipc::unordered_map<msg_id_t, cache_t> tls;
-        return tls;
-    }
-};
-
-template <typename W, typename F>
-bool wait_for(W& waiter, F&& pred, std::uint64_t tm) {
-    if (tm == 0) return !pred();
-    for (unsigned k = 0; pred();) {
-        bool ret = true;
-        ipc::sleep(k, [&k, &ret, &waiter, &pred, tm] {
-            ret = waiter.wait_if(std::forward<F>(pred), tm);
-            k   = 0;
-        });
-        if (!ret) return false; // timeout or fail
-        if (k == 0) break; // k has been reset
-    }
-    return true;
-}
-
-template <typename Policy,
-          std::size_t DataSize  = ipc::data_length,
-          std::size_t AlignSize = (ipc::detail::min)(DataSize, alignof(std::max_align_t))>
-struct queue_generator {
-
-    using queue_t = ipc::queue<msg_t<DataSize, AlignSize>, Policy>;
-
-    struct conn_info_t : conn_info_head {
-        queue_t que_;
-
-        conn_info_t(char const * name)
-            : conn_info_head{name}
-            , que_{("__QU_CONN__" +
-                    ipc::to_string(DataSize) + "__" +
-                    ipc::to_string(AlignSize) + "__" + name).c_str()} {
-        }
-
-        void disconnect_receiver() {
-            bool dis = que_.disconnect();
-            this->quit_waiting();
-            if (dis) {
-                this->recv_cache().clear();
-            }
-        }
-    };
-};
-
-template <typename Policy>
-struct detail_impl {
-
-using policy_t    = Policy;
-using flag_t      = typename policy_t::flag_t;
-using queue_t     = typename queue_generator<policy_t>::queue_t;
-using conn_info_t = typename queue_generator<policy_t>::conn_info_t;
-
-constexpr static conn_info_t* info_of(ipc::handle_t h) noexcept {
-    return static_cast<conn_info_t*>(h);
-}
-
-constexpr static queue_t* queue_of(ipc::handle_t h) noexcept {
-    return (info_of(h) == nullptr) ? nullptr : &(info_of(h)->que_);
-}
-
-/* API implementations */
-
-static void disconnect(ipc::handle_t h) {
-    auto que = queue_of(h);
-    if (que == nullptr) {
-        return;
-    }
-    que->shut_sending();
-    assert(info_of(h) != nullptr);
-    info_of(h)->disconnect_receiver();
-}
-
-static bool reconnect(ipc::handle_t * ph, bool start_to_recv) {
-    assert(ph != nullptr);
-    assert(*ph != nullptr);
-    auto que = queue_of(*ph);
-    if (que == nullptr) {
-        return false;
-    }
-    if (start_to_recv) {
-        que->shut_sending();
-        if (que->connect()) { // wouldn't connect twice
-            info_of(*ph)->cc_waiter_.broadcast();
-            return true;
-        }
-        return false;
-    }
-    // start_to_recv == false
-    if (que->connected()) {
-        info_of(*ph)->disconnect_receiver();
-    }
-    return que->ready_sending();
-}
-
-static bool connect(ipc::handle_t * ph, char const * name, bool start_to_recv) {
-    assert(ph != nullptr);
-    if (*ph == nullptr) {
-        *ph = ipc::mem::alloc<conn_info_t>(name);
-    }
-    return reconnect(ph, start_to_recv);
-}
-
-static void destroy(ipc::handle_t h) {
-    disconnect(h);
-    ipc::mem::free(info_of(h));
-}
-
-static std::size_t recv_count(ipc::handle_t h) noexcept {
-    auto que = queue_of(h);
-    if (que == nullptr) {
-        return ipc::invalid_value;
-    }
-    return que->conn_count();
-}
-
-static bool wait_for_recv(ipc::handle_t h, std::size_t r_count, std::uint64_t tm) {
-    auto que = queue_of(h);
-    if (que == nullptr) {
-        return false;
-    }
-    return wait_for(info_of(h)->cc_waiter_, [que, r_count] {
-        return que->conn_count() < r_count;
-    }, tm);
-}
-
-template <typename F>
-static bool send(F&& gen_push, ipc::handle_t h, void const * data, std::size_t size) {
-    if (data == nullptr || size == 0) {
-        ipc::error("fail: send(%p, %zd)\n", data, size);
-        return false;
-    }
-    auto que = queue_of(h);
-    if (que == nullptr) {
-        ipc::error("fail: send, queue_of(h) == nullptr\n");
-        return false;
-    }
-    if (que->elems() == nullptr) {
-        ipc::error("fail: send, queue_of(h)->elems() == nullptr\n");
-        return false;
-    }
-    if (!que->ready_sending()) {
-        ipc::error("fail: send, que->ready_sending() == false\n");
-        return false;
-    }
-    ipc::circ::cc_t conns = que->elems()->connections(std::memory_order_relaxed);
-    if (conns == 0) {
-        ipc::error("fail: send, there is no receiver on this connection.\n");
-        return false;
-    }
-    // calc a new message id
-    auto acc = info_of(h)->acc();
-    if (acc == nullptr) {
-        ipc::error("fail: send, info_of(h)->acc() == nullptr\n");
-        return false;
-    }
-    auto msg_id   = acc->fetch_add(1, std::memory_order_relaxed);
-    auto try_push = std::forward<F>(gen_push)(info_of(h), que, msg_id);
-    if (size > ipc::large_msg_limit) {
-        auto   dat = acquire_storage(size, conns);
-        void * buf = dat.second;
-        if (buf != nullptr) {
-            std::memcpy(buf, data, size);
-            return try_push(static_cast<std::int32_t>(size) - 
-                            static_cast<std::int32_t>(ipc::data_length), &(dat.first), 0);
-        }
-        // try using message fragment
-        //ipc::log("fail: shm::handle for big message. msg_id: %zd, size: %zd\n", msg_id, size);
-    }
-    // push message fragment
-    std::int32_t offset = 0;
-    for (std::int32_t i = 0; i < static_cast<std::int32_t>(size / ipc::data_length); ++i, offset += ipc::data_length) {
-        if (!try_push(static_cast<std::int32_t>(size) - offset - static_cast<std::int32_t>(ipc::data_length),
-                      static_cast<ipc::byte_t const *>(data) + offset, ipc::data_length)) {
-            return false;
-        }
-    }
-    // if remain > 0, this is the last message fragment
-    std::int32_t remain = static_cast<std::int32_t>(size) - offset;
-    if (remain > 0) {
-        if (!try_push(remain - static_cast<std::int32_t>(ipc::data_length),
-                      static_cast<ipc::byte_t const *>(data) + offset, 
-                      static_cast<std::size_t>(remain))) {
-            return false;
-        }
-    }
-    return true;
-}
-
-static bool send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm) {
-    return send([tm](auto info, auto que, auto msg_id) {
-        return [tm, info, que, msg_id](std::int32_t remain, void const * data, std::size_t size) {
-            if (!wait_for(info->wt_waiter_, [&] {
-                    return !que->push(
-                        [](void*) { return true; },
-                        info->cc_id_, msg_id, remain, data, size);
-                }, tm)) {
-                return false;
-            }
-            info->rd_waiter_.broadcast();
-            return true;
-        };
-    }, h, data, size);
-}
-
-static ipc::buff_t recv(ipc::handle_t h, std::uint64_t tm) {
-    auto que = queue_of(h);
-    if (que == nullptr) {
-        ipc::error("fail: recv, queue_of(h) == nullptr\n");
-        return {};
-    }
-    if (!que->connected()) {
-        // hasn't connected yet, just return.
-        return {};
-    }
-    auto& rc = info_of(h)->recv_cache();
-    for (;;) {
-        // pop a new message
-        typename queue_t::value_t msg;
-        if (!wait_for(info_of(h)->rd_waiter_, [que, &msg] {
-                return !que->pop(msg);
-            }, tm)) {
-            // pop failed, just return.
-            return {};
-        }
-        info_of(h)->wt_waiter_.broadcast();
-        if ((info_of(h)->acc() != nullptr) && (msg.cc_id_ == info_of(h)->cc_id_)) {
-            continue; // ignore message to self
-        }
-        // msg.remain_ may minus & abs(msg.remain_) < data_length
-        std::int32_t r_size = static_cast<std::int32_t>(ipc::data_length) + msg.remain_;
-        if (r_size <= 0) {
-            ipc::error("fail: recv, r_size = %d\n", (int)r_size);
-            return {};
-        }
-        std::size_t msg_size = static_cast<std::size_t>(r_size);
-        // large message
-        if (msg.storage_) {
-            ipc::storage_id_t buf_id = *reinterpret_cast<ipc::storage_id_t*>(&msg.data_);
-            void* buf = find_storage(buf_id, msg_size);
-            if (buf != nullptr) {
-                struct recycle_t {
-                    ipc::storage_id_t storage_id;
-                    ipc::circ::cc_t   curr_conns;
-                    ipc::circ::cc_t   conn_id;
-                } *r_info = ipc::mem::alloc<recycle_t>(recycle_t{
-                    buf_id, que->elems()->connections(std::memory_order_relaxed), que->connected_id()
-                });
-                if (r_info == nullptr) {
-                    ipc::log("fail: ipc::mem::alloc<recycle_t>.\n");
-                    return ipc::buff_t{buf, msg_size}; // no recycle
-                } else {
-                    return ipc::buff_t{buf, msg_size, [](void* p_info, std::size_t size) {
-                        auto r_info = static_cast<recycle_t *>(p_info);
-                        IPC_UNUSED_ auto finally = ipc::guard([r_info] {
-                            ipc::mem::free(r_info);
-                        });
-                        recycle_storage<flag_t>(r_info->storage_id, size, r_info->curr_conns, r_info->conn_id);
-                    }, r_info};
-                }
-            } else {
-                ipc::log("fail: shm::handle for large message. msg_id: %zd, buf_id: %zd, size: %zd\n", msg.id_, buf_id, msg_size);
-                continue;
-            }
-        }
-        // find cache with msg.id_
-        auto cac_it = rc.find(msg.id_);
-        if (cac_it == rc.end()) {
-            if (msg_size <= ipc::data_length) {
-                return make_cache(msg.data_, msg_size);
-            }
-            // gc
-            if (rc.size() > 1024) {
-                std::vector<msg_id_t> need_del;
-                for (auto const & pair : rc) {
-                    auto cmp = std::minmax(msg.id_, pair.first);
-                    if (cmp.second - cmp.first > 8192) {
-                        need_del.push_back(pair.first);
-                    }
-                }
-                for (auto id : need_del) rc.erase(id);
-            }
-            // cache the first message fragment
-            rc.emplace(msg.id_, cache_t { ipc::data_length, make_cache(msg.data_, msg_size) });
-        }
-        // has cached before this message
-        else {
-            auto& cac = cac_it->second;
-            // this is the last message fragment
-            if (msg.remain_ <= 0) {
-                cac.append(&(msg.data_), msg_size);
-                // finish this message, erase it from cache
-                auto buff = std::move(cac.buff_);
-                rc.erase(cac_it);
-                return buff;
-            }
-            // there are remain datas after this message
-            cac.append(&(msg.data_), ipc::data_length);
-        }
-    }
-}
-
-static ipc::buff_t try_recv(ipc::handle_t h) {
-    return recv(h, 0);
-}
-
-}; // detail_impl<Policy>
-
-template <typename Flag>
-using policy_t = ipc::policy::choose<ipc::circ::elem_array, Flag>;
-
-} // internal-linkage
-
-namespace ipc {
-
-template <typename Flag>
-bool chan_impl<Flag>::connect(ipc::handle_t * ph, char const * name, unsigned mode) {
-    return detail_impl<policy_t<Flag>>::connect(ph, name, mode & receiver);
-}
-
-template <typename Flag>
-bool chan_impl<Flag>::reconnect(ipc::handle_t * ph, unsigned mode) {
-    return detail_impl<policy_t<Flag>>::reconnect(ph, mode & receiver);
-}
-
-template <typename Flag>
-void chan_impl<Flag>::disconnect(ipc::handle_t h) {
-    detail_impl<policy_t<Flag>>::disconnect(h);
-}
-
-template <typename Flag>
-void chan_impl<Flag>::destroy(ipc::handle_t h) {
-    detail_impl<policy_t<Flag>>::destroy(h);
-}
-
-template <typename Flag>
-char const * chan_impl<Flag>::name(ipc::handle_t h) {
-    auto info = detail_impl<policy_t<Flag>>::info_of(h);
-    return (info == nullptr) ? nullptr : info->name_.c_str();
-}
-
-template <typename Flag>
-std::size_t chan_impl<Flag>::recv_count(ipc::handle_t h) {
-    return detail_impl<policy_t<Flag>>::recv_count(h);
-}
-
-template <typename Flag>
-bool chan_impl<Flag>::wait_for_recv(ipc::handle_t h, std::size_t r_count, std::uint64_t tm) {
-    return detail_impl<policy_t<Flag>>::wait_for_recv(h, r_count, tm);
-}
-
-template <typename Flag>
-bool chan_impl<Flag>::send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm) {
-    return detail_impl<policy_t<Flag>>::send(h, data, size, tm);
-}
-
-template <typename Flag>
-buff_t chan_impl<Flag>::recv(ipc::handle_t h, std::uint64_t tm) {
-    return detail_impl<policy_t<Flag>>::recv(h, tm);
-}
-
-template <typename Flag>
-buff_t chan_impl<Flag>::try_recv(ipc::handle_t h) {
-    return detail_impl<policy_t<Flag>>::try_recv(h);
-}
-
-template struct chan_impl<ipc::wr<relat::single, relat::single, trans::unicast  >>;
-// template struct chan_impl<ipc::wr<relat::single, relat::multi , trans::unicast  >>; // TBD
-// template struct chan_impl<ipc::wr<relat::multi , relat::multi , trans::unicast  >>; // TBD
-template struct chan_impl<ipc::wr<relat::single, relat::multi , trans::broadcast>>;
-template struct chan_impl<ipc::wr<relat::multi , relat::multi , trans::broadcast>>;
-
-} // namespace ipc
+#include "libipc/def.h"
\ No newline at end of file
diff --git a/src/libipc/memory/alloc.h b/src/libipc/memory/alloc.h
deleted file mode 100755
index 16bebc95..00000000
--- a/src/libipc/memory/alloc.h
+++ /dev/null
@@ -1,424 +0,0 @@
-#pragma once
-
-#include <algorithm>
-#include <utility>
-#include <iterator>
-#include <limits>       // std::numeric_limits
-#include <cstdlib>
-#include <cassert>      // assert
-
-#include "libipc/def.h"
-#include "libipc/rw_lock.h"
-
-#include "libipc/utility/concept.h"
-#include "libipc/memory/allocator_wrapper.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace mem {
-
-class static_alloc {
-public:
-    static void swap(static_alloc&) {}
-
-    static void* alloc(std::size_t size) {
-        return size ? std::malloc(size) : nullptr;
-    }
-
-    static void free(void* p) {
-        std::free(p);
-    }
-
-    static void free(void* p, std::size_t /*size*/) {
-        free(p);
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Scope allocation -- The destructor will release all allocated blocks.
-////////////////////////////////////////////////////////////////
-
-namespace detail {
-
-constexpr std::size_t aligned(std::size_t size, size_t alignment) noexcept {
-    return ( (size - 1) & ~(alignment - 1) ) + alignment;
-}
-
-IPC_CONCEPT_(has_take, take(std::move(std::declval<Type>())));
-
-class scope_alloc_base {
-protected:
-    struct block_t {
-        std::size_t size_;
-        block_t   * next_;
-    } * head_ = nullptr, * tail_ = nullptr;
-
-    enum : std::size_t {
-        aligned_block_size = aligned(sizeof(block_t), alignof(std::max_align_t))
-    };
-
-public:
-    void swap(scope_alloc_base & rhs) {
-        std::swap(head_, rhs.head_);
-        std::swap(tail_, rhs.tail_);
-    }
-
-    bool empty() const noexcept {
-        return head_ == nullptr;
-    }
-
-    void take(scope_alloc_base && rhs) {
-        if (rhs.empty()) return;
-        if (empty()) swap(rhs);
-        else {
-            std::swap(tail_->next_, rhs.head_);
-            // rhs.head_ should be nullptr here
-            tail_ = rhs.tail_;
-            rhs.tail_ = nullptr;
-        }
-    }
-
-    void free(void* /*p*/) {}
-    void free(void* /*p*/, std::size_t) {}
-};
-
-} // namespace detail
-
-template <typename AllocP = static_alloc>
-class scope_alloc : public detail::scope_alloc_base {
-public:
-    using base_t = detail::scope_alloc_base;
-    using alloc_policy = AllocP;
-
-private:
-    alloc_policy alloc_;
-
-    void free_all() {
-        while (!empty()) {
-            auto curr = head_;
-            head_ = head_->next_;
-            alloc_.free(curr, curr->size_);
-        }
-        // now head_ is nullptr
-    }
-
-public:
-    scope_alloc() = default;
-
-    scope_alloc(scope_alloc && rhs)         { swap(rhs); }
-    scope_alloc& operator=(scope_alloc rhs) { swap(rhs); return (*this); }
-
-    ~scope_alloc() { free_all(); }
-
-    void swap(scope_alloc& rhs) {
-        alloc_.swap(rhs.alloc_);
-        base_t::swap(rhs);
-    }
-
-    template <typename A = AllocP>
-    auto take(scope_alloc && rhs) -> ipc::require<detail::has_take<A>::value> {
-        base_t::take(std::move(rhs));
-        alloc_.take(std::move(rhs.alloc_));
-    }
-
-    template <typename A = AllocP>
-    auto take(scope_alloc && rhs) -> ipc::require<!detail::has_take<A>::value> {
-        base_t::take(std::move(rhs));
-    }
-
-    void* alloc(std::size_t size) {
-        std::size_t real_size = aligned_block_size + size;
-        auto curr = static_cast<block_t*>(alloc_.alloc(real_size));
-        curr->size_ = real_size;
-        curr->next_ = head_;
-        head_ = curr;
-        if (tail_ == nullptr) {
-            tail_ = curr;
-        }
-        return (reinterpret_cast<byte_t*>(curr) + aligned_block_size);
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Fixed-size blocks allocation
-////////////////////////////////////////////////////////////////
-
-namespace detail {
-
-class fixed_alloc_base {
-protected:
-    std::size_t block_size_;
-    std::size_t init_expand_;
-    void      * cursor_;
-
-    void init(std::size_t block_size, std::size_t init_expand) {
-        block_size_  = block_size;
-        init_expand_ = init_expand;
-        cursor_      = nullptr;
-    }
-
-    static void** node_p(void* node) {
-        return reinterpret_cast<void**>(node);
-    }
-
-    static auto& next(void* node) {
-        return *node_p(node);
-    }
-
-public:
-    bool operator<(fixed_alloc_base const & right) const {
-        return init_expand_ < right.init_expand_;
-    }
-
-    void set_block_size(std::size_t block_size) {
-        block_size_ = block_size;
-    }
-
-    void swap(fixed_alloc_base& rhs) {
-        std::swap(block_size_ , rhs.block_size_);
-        std::swap(init_expand_, rhs.init_expand_);
-        std::swap(cursor_     , rhs.cursor_);
-    }
-
-    bool empty() const noexcept {
-        return cursor_ == nullptr;
-    }
-
-    void take(fixed_alloc_base && rhs) {
-        assert(block_size_ == rhs.block_size_);
-        init_expand_ = (ipc::detail::max)(init_expand_, rhs.init_expand_);
-        if (rhs.empty()) return;
-        auto curr = cursor_;
-        if (curr != nullptr) while (1) {
-            auto next_cur = next(curr);
-            if (next_cur == nullptr) {
-                std::swap(next(curr), rhs.cursor_);
-                return;
-            }
-            // next_cur != nullptr
-            else curr = next_cur;
-        }
-        // curr == nullptr, means cursor_ == nullptr
-        else std::swap(cursor_, rhs.cursor_);
-        // rhs.cursor_ must be nullptr
-    }
-
-    void free(void* p) {
-        if (p == nullptr) return;
-        next(p) = cursor_;
-        cursor_ = p;
-    }
-
-    void free(void* p, std::size_t) {
-        free(p);
-    }
-};
-
-template <typename AllocP, typename ExpandP>
-class fixed_alloc : public detail::fixed_alloc_base {
-public:
-    using base_t = detail::fixed_alloc_base;
-    using alloc_policy = AllocP;
-
-private:
-    alloc_policy alloc_;
-
-    void* try_expand() {
-        if (empty()) {
-            auto size = ExpandP::next(block_size_, init_expand_);
-            auto p = node_p(cursor_ = alloc_.alloc(size));
-            for (std::size_t i = 0; i < (size / block_size_) - 1; ++i)
-                p = node_p((*p) = reinterpret_cast<byte_t*>(p) + block_size_);
-            (*p) = nullptr;
-        }
-        return cursor_;
-    }
-
-public:
-    explicit fixed_alloc(std::size_t block_size, std::size_t init_expand = 1) {
-        init(block_size, init_expand);
-    }
-
-    fixed_alloc(fixed_alloc && rhs) {
-        init(0, 0);
-        swap(rhs);
-    }
-
-    fixed_alloc& operator=(fixed_alloc rhs) {
-        swap(rhs);
-        return (*this);
-    }
-
-    void swap(fixed_alloc& rhs) {
-        alloc_.swap(rhs.alloc_);
-        base_t::swap(rhs);
-    }
-
-    template <typename A = AllocP>
-    auto take(fixed_alloc && rhs) -> ipc::require<detail::has_take<A>::value> {
-        base_t::take(std::move(rhs));
-        alloc_.take(std::move(rhs.alloc_));
-    }
-
-    void* alloc() {
-        void* p = try_expand();
-        cursor_ = next(p);
-        return p;
-    }
-
-    void* alloc(std::size_t) {
-        return alloc();
-    }
-};
-
-} // namespace detail
-
-template <std::size_t BaseSize  = sizeof(void*) * 1024, 
-          std::size_t LimitSize = (std::numeric_limits<std::uint32_t>::max)()>
-struct fixed_expand_policy {
-
-    enum : std::size_t {
-        base_size  = BaseSize,
-        limit_size = LimitSize
-    };
-
-    constexpr static std::size_t prev(std::size_t e) noexcept {
-        return ((e / 2) == 0) ? 1 : (e / 2);
-    }
-
-    constexpr static std::size_t next(std::size_t e) noexcept {
-        return e * 2;
-    }
-
-    static std::size_t next(std::size_t block_size, std::size_t & e) {
-        auto n = ipc::detail::max<std::size_t>(block_size, base_size) * e;
-             e = ipc::detail::min<std::size_t>(limit_size, next(e));
-        return n;
-    }
-};
-
-template <std::size_t BlockSize,
-          typename AllocP  = scope_alloc<>,
-          typename ExpandP = fixed_expand_policy<>>
-class fixed_alloc : public detail::fixed_alloc<AllocP, ExpandP> {
-public:
-    using base_t = detail::fixed_alloc<AllocP, ExpandP>;
-
-    enum : std::size_t {
-        block_size = ipc::detail::max<std::size_t>(BlockSize, sizeof(void*))
-    };
-
-public:
-    explicit fixed_alloc(std::size_t init_expand)
-        : base_t(block_size, init_expand) {
-    }
-
-    fixed_alloc() : fixed_alloc(1) {}
-
-    fixed_alloc(fixed_alloc && rhs)
-        : base_t(std::move(rhs)) {
-    }
-
-    fixed_alloc& operator=(fixed_alloc rhs) {
-        swap(rhs);
-        return (*this);
-    }
-
-    void swap(fixed_alloc& rhs) {
-        base_t::swap(rhs);
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Variable-size blocks allocation (without alignment)
-////////////////////////////////////////////////////////////////
-
-namespace detail {
-
-class variable_alloc_base {
-protected:
-    byte_t * head_ = nullptr, * tail_ = nullptr;
-
-public:
-    void swap(variable_alloc_base & rhs) {
-        std::swap(head_, rhs.head_);
-        std::swap(tail_, rhs.tail_);
-    }
-
-    std::size_t remain() const noexcept {
-        return static_cast<std::size_t>(tail_ - head_);
-    }
-
-    bool empty() const noexcept {
-        return remain() == 0;
-    }
-
-    void take(variable_alloc_base && rhs) {
-        if (remain() < rhs.remain()) {
-            // replace this by rhs
-            head_ = rhs.head_;
-            tail_ = rhs.tail_;
-        }
-        // discard rhs
-        rhs.head_ = rhs.tail_ = nullptr;
-    }
-
-    void free(void* /*p*/) {}
-    void free(void* /*p*/, std::size_t) {}
-};
-
-} // namespace detail
-
-template <std::size_t ChunkSize = (sizeof(void*) * 1024), typename AllocP = scope_alloc<>>
-class variable_alloc : public detail::variable_alloc_base {
-public:
-    using base_t       = detail::variable_alloc_base;
-    using alloc_policy = AllocP;
-
-    enum : std::size_t {
-        aligned_chunk_size = detail::aligned(ChunkSize, alignof(std::max_align_t))
-    };
-
-private:
-    alloc_policy alloc_;
-
-public:
-    variable_alloc() = default;
-
-    variable_alloc(variable_alloc && rhs)         { swap(rhs); }
-    variable_alloc& operator=(variable_alloc rhs) { swap(rhs); return (*this); }
-
-    void swap(variable_alloc& rhs) {
-        alloc_.swap(rhs.alloc_);
-        base_t::swap(rhs);
-    }
-
-    template <typename A = AllocP>
-    auto take(variable_alloc && rhs) -> ipc::require<detail::has_take<A>::value> {
-        base_t::take(std::move(rhs));
-        alloc_.take(std::move(rhs.alloc_));
-    }
-
-    void* alloc(std::size_t size) {
-        /*
-         * byte alignment is always alignof(std::max_align_t).
-        */
-        size = detail::aligned(size, alignof(std::max_align_t));
-        void* ptr;
-        // size would never be 0 here
-        if (remain() < size) {
-            std::size_t chunk_size = ipc::detail::max<std::size_t>(aligned_chunk_size, size);
-            ptr   = alloc_.alloc(chunk_size);
-            tail_ = static_cast<byte_t*>(ptr) + chunk_size;
-            head_ = tail_ - (chunk_size - size);
-        }
-        else {
-            ptr   = head_;
-            head_ += size;
-        }
-        return ptr;
-    }
-};
-
-} // namespace mem
-} // namespace ipc
diff --git a/src/libipc/memory/allocator_wrapper.h b/src/libipc/memory/allocator_wrapper.h
deleted file mode 100755
index d1c3ea36..00000000
--- a/src/libipc/memory/allocator_wrapper.h
+++ /dev/null
@@ -1,121 +0,0 @@
-#pragma once
-
-#include <limits>   // std::numeric_limits
-#include <utility>  // std::forward
-#include <cstddef>
-
-#include "libipc/pool_alloc.h"
-
-namespace ipc {
-namespace mem {
-
-////////////////////////////////////////////////////////////////
-/// The allocator wrapper class for STL
-////////////////////////////////////////////////////////////////
-
-namespace detail {
-
-template <typename T, typename AllocP>
-struct rebind {
-    template <typename U>
-    using alloc_t = AllocP;
-};
-
-template <typename T, template <typename> class AllocT>
-struct rebind<T, AllocT<T>> {
-    template <typename U>
-    using alloc_t = AllocT<U>;
-};
-
-} // namespace detail
-
-template <typename T, typename AllocP>
-class allocator_wrapper {
-
-    template <typename U, typename AllocU>
-    friend class allocator_wrapper;
-
-public:
-    // type definitions
-    typedef T                 value_type;
-    typedef value_type*       pointer;
-    typedef const value_type* const_pointer;
-    typedef value_type&       reference;
-    typedef const value_type& const_reference;
-    typedef std::size_t       size_type;
-    typedef std::ptrdiff_t    difference_type;
-    typedef AllocP            alloc_policy;
-
-private:
-    alloc_policy alloc_;
-
-public:
-    allocator_wrapper() noexcept {}
-
-    // construct by copying (do nothing)
-    allocator_wrapper           (const allocator_wrapper<T, AllocP>&) noexcept {}
-    allocator_wrapper& operator=(const allocator_wrapper<T, AllocP>&) noexcept { return *this; }
-	
-    // construct from a related allocator (do nothing)
-    template <typename U, typename AllocU> allocator_wrapper           (const allocator_wrapper<U, AllocU>&) noexcept {}
-    template <typename U, typename AllocU> allocator_wrapper& operator=(const allocator_wrapper<U, AllocU>&) noexcept { return *this; }
-
-    allocator_wrapper           (allocator_wrapper && rhs) noexcept : alloc_ ( std::move(rhs.alloc_) ) {}
-    allocator_wrapper& operator=(allocator_wrapper && rhs) noexcept { alloc_ = std::move(rhs.alloc_); return *this; }
-
-public:
-    // the other type of std_allocator
-    template <typename U>
-    struct rebind { 
-        using other = allocator_wrapper< U, typename detail::rebind<T, AllocP>::template alloc_t<U> >;
-    };
-
-    constexpr size_type max_size(void) const noexcept {
-        return (std::numeric_limits<size_type>::max)() / sizeof(value_type);
-    }
-
-public:
-    pointer allocate(size_type count) noexcept {
-        if (count == 0) return nullptr;
-        if (count > this->max_size()) return nullptr;
-        return static_cast<pointer>(alloc_.alloc(count * sizeof(value_type)));
-    }
-
-    void deallocate(pointer p, size_type count) noexcept {
-        alloc_.free(p, count * sizeof(value_type));
-    }
-
-    template <typename... P>
-    static void construct(pointer p, P && ... params) {
-        ipc::mem::construct(p, std::forward<P>(params)...);
-    }
-
-    static void destroy(pointer p) {
-        ipc::mem::destruct(p);
-    }
-};
-
-template <class AllocP>
-class allocator_wrapper<void, AllocP> {
-public:
-    // type definitions
-    typedef void              value_type;
-    typedef value_type*       pointer;
-    typedef const value_type* const_pointer;
-    typedef std::size_t       size_type;
-    typedef std::ptrdiff_t    difference_type;
-    typedef AllocP            alloc_policy;
-};
-
-template <typename T, typename U, class AllocP>
-constexpr bool operator==(const allocator_wrapper<T, AllocP>&, const allocator_wrapper<U, AllocP>&) noexcept {
-    return true;
-}
-
-template <typename T, typename U, class AllocP>
-constexpr bool operator!=(const allocator_wrapper<T, AllocP>&, const allocator_wrapper<U, AllocP>&) noexcept {
-    return false;
-}
-
-} // namespace mem
-} // namespace ipc
diff --git a/src/libipc/memory/resource.h b/src/libipc/memory/resource.h
deleted file mode 100755
index 38b6fb68..00000000
--- a/src/libipc/memory/resource.h
+++ /dev/null
@@ -1,90 +0,0 @@
-#pragma once
-
-#include <type_traits>
-#include <limits>
-#include <utility>
-#include <functional>
-#include <unordered_map>
-#include <map>
-#include <string>
-#include <cstdio>
-
-#include "libipc/def.h"
-
-#include "libipc/memory/alloc.h"
-#include "libipc/memory/wrapper.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace mem {
-
-//using async_pool_alloc = static_wrapper<variable_wrapper<async_wrapper<
-//    detail::fixed_alloc<
-//        variable_alloc                           <sizeof(void*) * 1024 * 256>, 
-//        fixed_expand_policy<sizeof(void*) * 1024, sizeof(void*) * 1024 * 256>
-//    >, 
-//    default_recycler >>>;
-using async_pool_alloc = ipc::mem::static_alloc;
-
-template <typename T>
-using allocator = allocator_wrapper<T, async_pool_alloc>;
-
-} // namespace mem
-
-namespace {
-
-constexpr char const * pf(int)                { return "%d"  ; }
-constexpr char const * pf(long)               { return "%ld" ; }
-constexpr char const * pf(long long)          { return "%lld"; }
-constexpr char const * pf(unsigned int)       { return "%u"  ; }
-constexpr char const * pf(unsigned long)      { return "%lu" ; }
-constexpr char const * pf(unsigned long long) { return "%llu"; }
-constexpr char const * pf(float)              { return "%f"  ; }
-constexpr char const * pf(double)             { return "%f"  ; }
-constexpr char const * pf(long double)        { return "%Lf" ; }
-
-} // internal-linkage
-
-template <typename T>
-struct hash : public std::hash<T> {};
-
-template <typename Key, typename T>
-using unordered_map = std::unordered_map<
-    Key, T, ipc::hash<Key>, std::equal_to<Key>, ipc::mem::allocator<std::pair<Key const, T>>
->;
-
-template <typename Key, typename T>
-using map = std::map<
-    Key, T, std::less<Key>, ipc::mem::allocator<std::pair<Key const, T>>
->;
-
-template <typename Char>
-using basic_string = std::basic_string<
-    Char, std::char_traits<Char>, ipc::mem::allocator<Char>
->;
-
-using string  = basic_string<char>;
-using wstring = basic_string<wchar_t>;
-
-template <> struct hash<string> {
-    std::size_t operator()(string const &val) const noexcept {
-        return std::hash<char const *>{}(val.c_str());
-    }
-};
-
-template <> struct hash<wstring> {
-    std::size_t operator()(wstring const &val) const noexcept {
-        return std::hash<wchar_t const *>{}(val.c_str());
-    }
-};
-
-template <typename T>
-ipc::string to_string(T val) {
-    char buf[std::numeric_limits<T>::digits10 + 1] {};
-    if (std::snprintf(buf, sizeof(buf), pf(val), val) > 0) {
-        return buf;
-    }
-    return {};
-}
-
-} // namespace ipc
diff --git a/src/libipc/memory/wrapper.h b/src/libipc/memory/wrapper.h
deleted file mode 100755
index b0b7c588..00000000
--- a/src/libipc/memory/wrapper.h
+++ /dev/null
@@ -1,327 +0,0 @@
-#pragma once
-
-#include <tuple>
-#include <thread>
-#include <deque>        // std::deque
-#include <functional>   // std::function
-#include <utility>      // std::forward
-#include <cstddef>
-#include <cassert>      // assert
-#include <type_traits>  // std::aligned_storage_t
-
-#include "libipc/def.h"
-#include "libipc/rw_lock.h"
-#include "libipc/pool_alloc.h"
-
-#include "libipc/utility/concept.h"
-#include "libipc/memory/alloc.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace mem {
-
-////////////////////////////////////////////////////////////////
-/// Thread-safe allocation wrapper
-////////////////////////////////////////////////////////////////
-
-namespace detail {
-
-IPC_CONCEPT_(is_comparable, operator<(std::declval<Type>()));
-
-} // namespace detail
-
-template <typename AllocP, bool = detail::is_comparable<AllocP>::value>
-class limited_recycler;
-
-template <typename AllocP>
-class limited_recycler<AllocP, true> {
-public:
-    using alloc_policy = AllocP;
-
-protected:
-    std::deque<alloc_policy> master_allocs_;
-    ipc::spin_lock master_lock_;
-
-    template <typename F>
-    void take_first_do(F && pred) {
-        auto it = master_allocs_.begin();
-        pred(const_cast<alloc_policy&>(*it));
-        master_allocs_.erase(it);
-    }
-
-public:
-    void try_recover(alloc_policy & alc) {
-        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(master_lock_);
-        if (master_allocs_.empty()) return;
-        take_first_do([&alc](alloc_policy & first) { alc.swap(first); });
-    }
-
-    void collect(alloc_policy && alc) {
-        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(master_lock_);
-        if (master_allocs_.size() >= 32) {
-            take_first_do([](alloc_policy &) {}); // erase first
-        }
-        master_allocs_.emplace_back(std::move(alc));
-    }
-
-    IPC_CONSTEXPR_ auto try_replenish(alloc_policy&, std::size_t) noexcept {}
-};
-
-template <typename AllocP>
-class default_recycler : public limited_recycler<AllocP> {
-
-    IPC_CONCEPT_(has_remain, remain());
-    IPC_CONCEPT_(has_empty , empty());
-
-    template <typename A>
-    void try_fill(A & alc) {
-        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(this->master_lock_);
-        if (this->master_allocs_.empty()) return;
-        this->take_first_do([&alc](alloc_policy & first) { alc.take(std::move(first)); });
-    }
-
-public:
-    using alloc_policy = typename limited_recycler<AllocP>::alloc_policy;
-
-    template <typename A = AllocP>
-    auto try_replenish(alloc_policy & alc, std::size_t size)
-        -> ipc::require<detail::has_take<A>::value && has_remain<A>::value> {
-        if (alc.remain() >= size) return;
-        this->try_fill(alc);
-    }
-
-    template <typename A = AllocP>
-    auto try_replenish(alloc_policy & alc, std::size_t /*size*/)
-        -> ipc::require<detail::has_take<A>::value && !has_remain<A>::value && has_empty<A>::value> {
-        if (!alc.empty()) return;
-        this->try_fill(alc);
-    }
-
-    template <typename A = AllocP>
-    auto try_replenish(alloc_policy & alc, std::size_t /*size*/)
-        -> ipc::require<!detail::has_take<A>::value && has_empty<A>::value> {
-        if (!alc.empty()) return;
-        this->try_recover(alc);
-    }
-
-    template <typename A = AllocP>
-    IPC_CONSTEXPR_ auto try_replenish(alloc_policy & /*alc*/, std::size_t /*size*/) noexcept
-        -> ipc::require<(!detail::has_take<A>::value || !has_remain<A>::value) && !has_empty<A>::value> {
-        // Do Nothing.
-    }
-};
-
-template <typename AllocP>
-class empty_recycler {
-public:
-    using alloc_policy = AllocP;
-
-    IPC_CONSTEXPR_ void try_recover(alloc_policy&)                noexcept {}
-    IPC_CONSTEXPR_ auto try_replenish(alloc_policy&, std::size_t) noexcept {}
-    IPC_CONSTEXPR_ void collect(alloc_policy&&)                   noexcept {}
-};
-
-template <typename AllocP,
-          template <typename> class RecyclerP = default_recycler>
-class async_wrapper {
-public:
-    using alloc_policy = AllocP;
-
-private:
-    RecyclerP<alloc_policy> recycler_;
-
-    class alloc_proxy : public AllocP {
-        async_wrapper * w_ = nullptr;
-
-    public:
-        alloc_proxy(alloc_proxy && rhs) = default;
-
-        template <typename ... P>
-        alloc_proxy(async_wrapper* w, P && ... pars)
-            : AllocP(std::forward<P>(pars) ...), w_(w) {
-            assert(w_ != nullptr);
-            w_->recycler_.try_recover(*this);
-        }
-
-        ~alloc_proxy() {
-            w_->recycler_.collect(std::move(*this));
-        }
-
-        auto alloc(std::size_t size) {
-            w_->recycler_.try_replenish(*this, size);
-            return AllocP::alloc(size);
-        }
-    };
-
-    friend class alloc_proxy;
-    using ref_t = alloc_proxy&;
-
-    std::function<ref_t()> get_alloc_;
-
-public:
-    template <typename ... P>
-    async_wrapper(P ... pars) {
-        get_alloc_ = [this, pars ...]()->ref_t {
-            thread_local alloc_proxy tls(pars ...);
-            return tls;
-        };
-    }
-
-    void* alloc(std::size_t size) {
-        return get_alloc_().alloc(size);
-    }
-
-    void free(void* p, std::size_t size) {
-        get_alloc_().free(p, size);
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Thread-safe allocation wrapper (with spin_lock)
-////////////////////////////////////////////////////////////////
-
-template <typename AllocP, typename MutexT = ipc::spin_lock>
-class sync_wrapper {
-public:
-    using alloc_policy = AllocP;
-    using mutex_type   = MutexT;
-
-private:
-    mutex_type   lock_;
-    alloc_policy alloc_;
-
-public:
-    template <typename ... P>
-    sync_wrapper(P && ... pars)
-        : alloc_(std::forward<P>(pars) ...)
-    {}
-
-    void swap(sync_wrapper& rhs) {
-        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(lock_);
-        alloc_.swap(rhs.alloc_);
-    }
-
-    void* alloc(std::size_t size) {
-        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(lock_);
-        return alloc_.alloc(size);
-    }
-
-    void free(void* p, std::size_t size) {
-        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(lock_);
-        alloc_.free(p, size);
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Variable memory allocation wrapper
-////////////////////////////////////////////////////////////////
-
-template <std::size_t BaseSize = 0, std::size_t IterSize = sizeof(void*)>
-struct default_mapping_policy {
-
-    enum : std::size_t {
-        base_size    = BaseSize,
-        iter_size    = IterSize,
-        classes_size = 64
-    };
-
-    template <typename F, typename ... P>
-    IPC_CONSTEXPR_ static void foreach(F && f, P && ... params) {
-        for (std::size_t i = 0; i < classes_size; ++i) {
-            f(i, std::forward<P>(params)...);
-        }
-    }
-
-    IPC_CONSTEXPR_ static std::size_t block_size(std::size_t id) noexcept {
-        return (id < classes_size) ? (base_size + (id + 1) * iter_size) : 0;
-    }
-
-    template <typename F, typename D, typename ... P>
-    IPC_CONSTEXPR_ static auto classify(F && f, D && d, std::size_t size, P && ... params) {
-        std::size_t id = (size - base_size - 1) / iter_size;
-        return (id < classes_size) ? 
-            f(id, size, std::forward<P>(params)...) : 
-            d(size, std::forward<P>(params)...);
-    }
-};
-
-template <typename FixedAlloc,
-          typename DefaultAlloc = mem::static_alloc,
-          typename MappingP     = default_mapping_policy<>>
-class variable_wrapper {
-
-    struct initiator {
-
-        using falc_t = std::aligned_storage_t<sizeof(FixedAlloc), alignof(FixedAlloc)>;
-        falc_t arr_[MappingP::classes_size];
-
-        initiator() {
-            MappingP::foreach([](std::size_t id, falc_t * a) {
-                ipc::mem::construct(&initiator::at(a, id), MappingP::block_size(id));
-            }, arr_);
-        }
-
-        ~initiator() {
-            MappingP::foreach([](std::size_t id, falc_t * a) {
-                ipc::mem::destruct(&initiator::at(a, id));
-            }, arr_);
-        }
-
-        static FixedAlloc & at(falc_t * arr, std::size_t id) noexcept {
-            return reinterpret_cast<FixedAlloc&>(arr[id]);
-        }
-    } init_;
-
-    using falc_t = typename initiator::falc_t;
-
-public:
-    void swap(variable_wrapper & other) {
-        MappingP::foreach([](std::size_t id, falc_t * in, falc_t * ot) {
-            initiator::at(in, id).swap(initiator::at(ot, id));
-        }, init_.arr_, other.init_.arr_);
-    }
-
-    void* alloc(std::size_t size) {
-        return MappingP::classify([](std::size_t id, std::size_t size, falc_t * a) {
-            return initiator::at(a, id).alloc(size);
-        }, [](std::size_t size, falc_t *) {
-            return DefaultAlloc::alloc(size);
-        }, size, init_.arr_);
-    }
-
-    void free(void* p, std::size_t size) {
-        MappingP::classify([](std::size_t id, std::size_t size, void* p, falc_t * a) {
-            initiator::at(a, id).free(p, size);
-        }, [](std::size_t size, void* p, falc_t *) {
-            DefaultAlloc::free(p, size);
-        }, size, p, init_.arr_);
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Static allocation wrapper
-////////////////////////////////////////////////////////////////
-
-template <typename AllocP>
-class static_wrapper {
-public:
-    using alloc_policy = AllocP;
-
-    static alloc_policy& instance() {
-        static alloc_policy alloc;
-        return alloc;
-    }
-
-    static void swap(static_wrapper&) {}
-
-    static void* alloc(std::size_t size) {
-        return instance().alloc(size);
-    }
-
-    static void free(void* p, std::size_t size) {
-        instance().free(p, size);
-    }
-};
-
-} // namespace mem
-} // namespace ipc
diff --git a/src/libipc/platform/detail.h b/src/libipc/platform/detail.h
deleted file mode 100755
index e93c1d29..00000000
--- a/src/libipc/platform/detail.h
+++ /dev/null
@@ -1,136 +0,0 @@
-#ifndef LIBIPC_SRC_PLATFORM_DETAIL_H_
-#define LIBIPC_SRC_PLATFORM_DETAIL_H_
-
-// detect platform
-
-#if defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
-    defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
-    defined(WINCE) || defined(_WIN32_WCE)
-#   define IPC_OS_WINDOWS_
-#elif defined(__linux__) || defined(__linux)
-#   define IPC_OS_LINUX_
-#elif defined(__QNX__)
-#   define IPC_OS_QNX_
-#elif defined(__APPLE__)
-#elif defined(__ANDROID__)
-// TBD
-#endif
-
-#if defined(__cplusplus)
-
-#include <memory>
-#include <mutex>
-#include <shared_mutex>
-#include <type_traits>
-#include <tuple>
-#include <algorithm>
-
-// pre-defined
-
-#ifdef IPC_UNUSED_
-#   error "IPC_UNUSED_ has been defined."
-#endif
-#ifdef IPC_FALLTHROUGH_
-#   error "IPC_FALLTHROUGH_ has been defined."
-#endif
-#ifdef IPC_STBIND_
-#   error "IPC_STBIND_ has been defined."
-#endif
-#ifdef IPC_CONSTEXPR_
-#   error "IPC_CONSTEXPR_ has been defined."
-#endif
-
-#if __cplusplus >= 201703L
-
-#define IPC_UNUSED_      [[maybe_unused]]
-#define IPC_FALLTHROUGH_ [[fallthrough]]
-#define IPC_STBIND_(A, B, ...) auto [A, B] = __VA_ARGS__
-#define IPC_CONSTEXPR_   constexpr
-
-#else /*__cplusplus < 201703L*/
-
-#if defined(_MSC_VER)
-#   define IPC_UNUSED_ __pragma(warning(suppress: 4100 4101 4189))
-#elif defined(__GNUC__)
-#   define IPC_UNUSED_ __attribute__((__unused__))
-#else
-#   define IPC_UNUSED_
-#endif
-
-#define IPC_FALLTHROUGH_
-
-#define IPC_STBIND_(A, B, ...)       \
-    auto tp___ = __VA_ARGS__         \
-    auto A     = std::get<0>(tp___); \
-    auto B     = std::get<1>(tp___)
-
-#define IPC_CONSTEXPR_ inline
-
-#endif/*__cplusplus < 201703L*/
-
-#if __cplusplus >= 201703L
-
-namespace std {
-
-// deduction guides for std::unique_ptr
-template <typename T>
-unique_ptr(T* p) -> unique_ptr<T>;
-template <typename T, typename D>
-unique_ptr(T* p, D&& d) -> unique_ptr<T, std::decay_t<D>>;
-
-} // namespace std
-
-namespace ipc {
-namespace detail {
-
-using std::unique_ptr;
-using std::unique_lock;
-using std::shared_lock;
-using std::max;
-using std::min;
-
-#else /*__cplusplus < 201703L*/
-
-namespace ipc {
-namespace detail {
-
-// deduction guides for std::unique_ptr
-template <typename T>
-constexpr auto unique_ptr(T* p) noexcept {
-    return std::unique_ptr<T> { p };
-}
-
-template <typename T, typename D>
-constexpr auto unique_ptr(T* p, D&& d) noexcept {
-    return std::unique_ptr<T, std::decay_t<D>> { p, std::forward<D>(d) };
-}
-
-// deduction guides for std::unique_lock
-template <typename T>
-constexpr auto unique_lock(T&& lc) noexcept {
-    return std::unique_lock<std::decay_t<T>> { std::forward<T>(lc) };
-}
-
-// deduction guides for std::shared_lock
-template <typename T>
-constexpr auto shared_lock(T&& lc) noexcept {
-    return std::shared_lock<std::decay_t<T>> { std::forward<T>(lc) };
-}
-
-template <typename T>
-constexpr const T& (max)(const T& a, const T& b) {
-    return (a < b) ? b : a;
-}
-
-template <typename T>
-constexpr const T& (min)(const T& a, const T& b) {
-    return (b < a) ? b : a;
-}
-
-#endif/*__cplusplus < 201703L*/
-
-} // namespace detail
-} // namespace ipc
-
-#endif // defined(__cplusplus)
-#endif // LIBIPC_SRC_PLATFORM_DETAIL_H_
\ No newline at end of file
diff --git a/src/libipc/platform/linux/a0/LICENSE b/src/libipc/platform/linux/a0/LICENSE
deleted file mode 100644
index cf1ab25d..00000000
--- a/src/libipc/platform/linux/a0/LICENSE
+++ /dev/null
@@ -1,24 +0,0 @@
-This is free and unencumbered software released into the public domain.
-
-Anyone is free to copy, modify, publish, use, compile, sell, or
-distribute this software, either in source code form or as a compiled
-binary, for any purpose, commercial or non-commercial, and by any
-means.
-
-In jurisdictions that recognize copyright laws, the author or authors
-of this software dedicate any and all copyright interest in the
-software to the public domain. We make this dedication for the benefit
-of the public at large and to the detriment of our heirs and
-successors. We intend this dedication to be an overt act of
-relinquishment in perpetuity of all present and future rights to this
-software under copyright law.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
-OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
-ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-OTHER DEALINGS IN THE SOFTWARE.
-
-For more information, please refer to <http://unlicense.org>
diff --git a/src/libipc/platform/linux/a0/README.md b/src/libipc/platform/linux/a0/README.md
deleted file mode 100644
index 8aed9d7c..00000000
--- a/src/libipc/platform/linux/a0/README.md
+++ /dev/null
@@ -1,213 +0,0 @@
-<h1 align="center">
-  <br>
-  <img src="https://raw.githubusercontent.com/alephzero/logo/master/rendered/alephzero.svg" width="256px">
-  <br>
-  AlephZero
-</h1>
-
-<h3 align="center">Simple, Robust, Fast IPC.</h3>
-
-<p align="center">
-  <a href="https://github.com/alephzero/alephzero/actions?query=workflow%3ACI"><img src="https://github.com/alephzero/alephzero/workflows/CI/badge.svg"></a>
-  <a href="https://codecov.io/gh/alephzero/alephzero"><img src="https://codecov.io/gh/alephzero/alephzero/branch/master/graph/badge.svg"></a>
-  <a href="https://alephzero.readthedocs.io/en/latest/?badge=latest"><img src="https://readthedocs.org/projects/alephzero/badge/?version=latest"></a>
-  <a href="http://unlicense.org"><img src="https://img.shields.io/badge/license-Unlicense-blue.svg"></a>
-</p>
-
-<p align="center">
-  <a href="#overview">Overview</a> •
-  <a href="#transport">Transport</a> •
-  <a href="#protocol">Protocol</a> •
-  <a href="#examples">Examples</a> •
-  <a href="#installation">Installation</a> •
-  <a href="#across-dockers">Across Dockers</a>
-</p>
-
-# Overview
-
-[Presentation from March 25, 2020](https://docs.google.com/presentation/d/12KE9UucjZPtpVnM1NljxOqBolBBKECWJdrCoE2yJaBw/edit#slide=id.p)
-
-AlephZero is a library for message based communication between programs running on the same machine.
-
-## Simple
-
-AlephZero's main goal is to be simple to use. Nothing is higher priority.
-
-There is no "master" process in between your nodes that is needed to do handshakes or exchanges of any kind. All you need is the topic name.
-
-See the <a href="#examples">Examples</a>.
-
-## Robust
-
-This is probably the main value of AlephZero, above similar libraries.
-
-AlephZero uses a lot of tricks to ensure the state of all channels is consistent, even when programs die. This includes double-buffering the state of the communication channel and [robustifying](https://man7.org/linux/man-pages/man3/pthread_mutexattr_setrobust.3.html) the locks and notification channels.
-
-## Fast
-
-AlephZero uses shared memory across multiple processes to read and write messages, minimizing the involvement of the kernel. The kernel only really gets involved in notifying a process that a new message exists, and for that we use futex (fast user-space mutex).
-
-TODO: Benchmarks
-
-# Transport
-
-AlephZero, at its core, is a simple allocator on top of a contiguous region of memory. Usually, shared-memory. The allocator of choice is a circular-linked-list, which is fast, simple, and sufficient for the protocol listed below. It also plays well with the robustness requirement.
-
-This has a number of implications. For one, this means that old messages are kept around until the space is needed. The oldest messages are always discarded before any more recent messages.
-
-# Protocol
-
-Rather than exposing the low-level transport directly, AlephZero provides a few higher level protocol:
-
-* <b>PubSub</b>: Broadcast published messages. Subscribers get notified.
-* <b>RPC</b>: Request-response.
-* <b>PRPC (Progressive RPC)</b>: Request-streaming response.
-* <b>Sessions</b>: Bi-directional channel of communication. Not yet implemented. Let me know if you want this.
-
-# Examples
-
-Many more example and an interactive experience can be found at: https://github.com/alephzero/playground
-
-For the curious, here are some simple snippets to get you started:
-
-To begin with, we need to include AlephZero:
-```cc
-#include <a0.h>
-```
-
-## PubSub
-
-You can have as many publisher and subscribers on the same topic as you wish. They just need to agree on the filename.
-
-```cc
-a0::Publisher p("my_pubsub_topic");
-p.pub("foo");
-```
-
-You just published `"foo"` to the `"my_pubsub_topic"`.
-
-To read those message, you can create a subscriber on the same topic:
-```cc
-a0::Subscriber sub(
-    "my_pubsub_topic",
-    A0_INIT_AWAIT_NEW,  // or MOST_RECENT or OLDEST
-    A0_ITER_NEWEST,     // or NEXT
-    [](a0::PacketView pkt_view) {
-      std::cout << "Got: " << pkt_view.payload() << std::endl;
-    });
-```
-The callback will trigger whenever a message is published.
-
-The `Subscriber` object spawns a thread that will read the topic and call the callback.
-
-The `A0_INIT` tells the subscriber where to start reading. 
-* `A0_INIT_AWAIT_NEW`: Start with messages published after the creation of the subscriber.
-* `A0_INIT_MOST_RECENT`: Start with the most recently published message. Useful for state and configuration. But be careful, this can be quite old!
-* `A0_INIT_OLDEST`: Topics keep a history of 16MB (unless configures otherwise). Start with the oldest thing still in there.
-
-The `A0_ITER` tells the subscriber how to continue reading messages. After each callback:
-* `A0_ITER_NEXT`: grab the sequentially next message. When you don't want to miss a thing.
-* `A0_ITER_NEWEST`: grab the newest available unread message. When you want to keep up with the firehose.
-
-```cc
-a0::SubscriberSync sub_sync(
-    "my_pubsub_topic",
-    A0_INIT_OLDEST, A0_ITER_NEXT);
-while (sub_sync.has_next()) {
-  auto pkt = sub_sync.next();
-  std::cout << "Got: " << pkt.payload() << std::endl;
-}
-```
-
-## RPC
-
-Create an `RpcServer`:
-
-```cc
-a0::RpcServer server(
-    "my_rpc_topic",
-    /* onrequest = */ [](a0::RpcRequest req) {
-        std::cout << "Got: " << req.pkt().payload() << std::endl;
-        req.reply("echo " + std::string(req.pkt().payload()));
-    },
-    /* oncancel = */ nullptr);
-```
-
-Create an `RpcClient`:
-
-```cc
-a0::RpcClient client("my_rpc_topic");
-client.send("client msg", [](a0::PacketView reply) {
-  std::cout << "Got: " << reply.payload() << std::endl;
-});
-```
-
-# Installation
-
-## Install From Source
-
-### Ubuntu Dependencies
-
-```sh
-apt install g++ make
-```
-
-### Alpine Dependencies
-
-```sh
-apk add g++ linux-headers make
-```
-
-### Download And Install
-
-```sh
-git clone https://github.com/alephzero/alephzero.git
-cd alephzero
-make install -j
-```
-
-## Install From Package
-
-Coming soon-ish. Let me know if you want this and I'll prioritize it. External support is much appreciated.
-
-## Integration
-
-### Command Line
-
-Add the following to g++ / clang commands.
-```sh
--L${libdir} -lalephzero -lpthread
-```
-
-### Package-cfg
-
-```sh
-pkg-config --cflags --libs alephzero
-```
-
-### CMake
-
-Coming soon-ish. Let me know if you want this and I'll prioritize it. External support is much appreciated.
-
-### Bazel
-
-Coming soon-ish. Let me know if you want this and I'll prioritize it.
-
-# Across Dockers
-
-For programs running across different dockers to be able to communicate, we need to have them match up on two flags: `--ipc` and `--pid`.
-
-* `--ipc` shares the `/dev/shm` filesystem. This is necessary to open the same file topics.
-* `--pid` shares the process id namespace. This is necessary for the locking and notification systems.
-
-In the simplest case, you can set them both to `host` and talk through the system's global `/dev/shm` and process id namespace.
-```sh
-docker run --ipc=host --pid=host --name=foo foo_image
-docker run --ipc=host --pid=host --name=bar bar_image
-```
-
-Or, you can mark one as `shareable` and have the others connect to it:
-```sh
-docker run --ipc=shareable --pid=shareable --name=foo foo_image
-docker run --ipc=container:foo --pid=container:foo --name=bar bar_image
-```
diff --git a/src/libipc/platform/linux/a0/atomic.h b/src/libipc/platform/linux/a0/atomic.h
deleted file mode 100644
index 09a26ffb..00000000
--- a/src/libipc/platform/linux/a0/atomic.h
+++ /dev/null
@@ -1,36 +0,0 @@
-#ifndef A0_SRC_ATOMIC_H
-#define A0_SRC_ATOMIC_H
-
-#include "a0/inline.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-A0_STATIC_INLINE
-void a0_barrier() {
-  // 'atomic_thread_fence' is not supported with ‘-fsanitize=thread’
-  __sync_synchronize();
-}
-
-#define a0_atomic_fetch_add(P, V) __atomic_fetch_add((P), (V), __ATOMIC_RELAXED)
-#define a0_atomic_add_fetch(P, V) __atomic_add_fetch((P), (V), __ATOMIC_RELAXED)
-
-#define a0_atomic_fetch_and(P, V) __atomic_fetch_and((P), (V), __ATOMIC_RELAXED)
-#define a0_atomic_and_fetch(P, V) __atomic_and_fetch((P), (V), __ATOMIC_RELAXED)
-
-#define a0_atomic_fetch_or(P, V) __atomic_fetch_or((P), (V), __ATOMIC_RELAXED)
-#define a0_atomic_or_fetch(P, V) __atomic_or_fetch((P), (V), __ATOMIC_RELAXED)
-
-#define a0_atomic_load(P) __atomic_load_n((P), __ATOMIC_RELAXED)
-#define a0_atomic_store(P, V) __atomic_store_n((P), (V), __ATOMIC_RELAXED)
-
-// TODO(lshamis): Switch from __sync to __atomic.
-#define a0_cas_val(P, OV, NV) __sync_val_compare_and_swap((P), (OV), (NV))
-#define a0_cas(P, OV, NV) __sync_bool_compare_and_swap((P), (OV), (NV))
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_SRC_ATOMIC_H
diff --git a/src/libipc/platform/linux/a0/clock.h b/src/libipc/platform/linux/a0/clock.h
deleted file mode 100644
index 7b2a88b2..00000000
--- a/src/libipc/platform/linux/a0/clock.h
+++ /dev/null
@@ -1,60 +0,0 @@
-#ifndef A0_SRC_CLOCK_H
-#define A0_SRC_CLOCK_H
-
-#include "a0/err.h"
-#include "a0/inline.h"
-
-#include <stdint.h>
-#include <time.h>
-
-#include "err_macro.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-static const int64_t NS_PER_SEC = 1e9;
-
-typedef struct timespec timespec_t;
-
-A0_STATIC_INLINE
-a0_err_t a0_clock_now(clockid_t clk, timespec_t* out) {
-  A0_RETURN_SYSERR_ON_MINUS_ONE(clock_gettime(clk, out));
-  return A0_OK;
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_clock_add(timespec_t ts, int64_t add_nsec, timespec_t* out) {
-  out->tv_sec = ts.tv_sec + add_nsec / NS_PER_SEC;
-  out->tv_nsec = ts.tv_nsec + add_nsec % NS_PER_SEC;
-  if (out->tv_nsec >= NS_PER_SEC) {
-    out->tv_sec++;
-    out->tv_nsec -= NS_PER_SEC;
-  } else if (out->tv_nsec < 0) {
-    out->tv_sec--;
-    out->tv_nsec += NS_PER_SEC;
-  }
-
-  return A0_OK;
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_clock_convert(
-    clockid_t orig_clk,
-    timespec_t orig_ts,
-    clockid_t target_clk,
-    timespec_t* target_ts) {
-  timespec_t orig_now;
-  A0_RETURN_ERR_ON_ERR(a0_clock_now(orig_clk, &orig_now));
-  timespec_t target_now;
-  A0_RETURN_ERR_ON_ERR(a0_clock_now(target_clk, &target_now));
-
-  int64_t add_nsec = (orig_ts.tv_sec - orig_now.tv_sec) * NS_PER_SEC + (orig_ts.tv_nsec - orig_now.tv_nsec);
-  return a0_clock_add(target_now, add_nsec, target_ts);
-}
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_SRC_CLOCK_H
diff --git a/src/libipc/platform/linux/a0/empty.h b/src/libipc/platform/linux/a0/empty.h
deleted file mode 100644
index 69fef8a7..00000000
--- a/src/libipc/platform/linux/a0/empty.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef A0_EMPTY_H
-#define A0_EMPTY_H
-
-// Bah. Why is there no consistent way to zero initialize a struct?
-#ifdef __cplusplus
-#define A0_EMPTY \
-  {}
-#else
-#define A0_EMPTY \
-  { 0 }
-#endif
-
-#endif  // A0_EMPTY_H
diff --git a/src/libipc/platform/linux/a0/err.c b/src/libipc/platform/linux/a0/err.c
deleted file mode 100644
index a48b8585..00000000
--- a/src/libipc/platform/linux/a0/err.c
+++ /dev/null
@@ -1,50 +0,0 @@
-#include "a0/err.h"
-#include "a0/thread_local.h"
-
-#include <errno.h>
-#include <string.h>
-
-A0_THREAD_LOCAL int a0_err_syscode;
-A0_THREAD_LOCAL char a0_err_msg[1024];
-
-const char* a0_strerror(a0_err_t err) {
-  switch (err) {
-    case A0_OK: {
-      return strerror(0);
-    }
-    case A0_ERR_SYS: {
-      return strerror(a0_err_syscode);
-    }
-    case A0_ERR_CUSTOM_MSG: {
-      return a0_err_msg;
-    }
-    case A0_ERR_INVALID_ARG: {
-      return strerror(EINVAL);
-    }
-    case A0_ERR_RANGE: {
-      return "Index out of bounds";
-    }
-    case A0_ERR_AGAIN: {
-      return "Not available yet";
-    }
-    case A0_ERR_FRAME_LARGE: {
-      return "Frame size too large";
-    }
-    case A0_ERR_ITER_DONE: {
-      return "Done iterating";
-    }
-    case A0_ERR_NOT_FOUND: {
-      return "Not found";
-    }
-    case A0_ERR_BAD_PATH: {
-      return "Invalid path";
-    }
-    case A0_ERR_BAD_TOPIC: {
-      return "Invalid topic name";
-    }
-    default: {
-      break;
-    }
-  }
-  return "";
-}
diff --git a/src/libipc/platform/linux/a0/err.h b/src/libipc/platform/linux/a0/err.h
deleted file mode 100644
index 05b70079..00000000
--- a/src/libipc/platform/linux/a0/err.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef A0_ERR_H
-#define A0_ERR_H
-
-#include "a0/thread_local.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef enum a0_err_e {
-  A0_OK = 0,
-  A0_ERR_SYS = 1,
-  A0_ERR_CUSTOM_MSG = 2,
-  A0_ERR_INVALID_ARG = 3,
-  A0_ERR_RANGE = 4,
-  A0_ERR_AGAIN = 5,
-  A0_ERR_ITER_DONE = 6,
-  A0_ERR_NOT_FOUND = 7,
-  A0_ERR_FRAME_LARGE = 8,
-  A0_ERR_BAD_PATH = 9,
-  A0_ERR_BAD_TOPIC = 10,
-} a0_err_t;
-
-extern A0_THREAD_LOCAL int a0_err_syscode;
-extern A0_THREAD_LOCAL char a0_err_msg[1024];
-
-const char* a0_strerror(a0_err_t);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_ERR_H
diff --git a/src/libipc/platform/linux/a0/err_macro.h b/src/libipc/platform/linux/a0/err_macro.h
deleted file mode 100644
index 6683efcd..00000000
--- a/src/libipc/platform/linux/a0/err_macro.h
+++ /dev/null
@@ -1,52 +0,0 @@
-#ifndef A0_SRC_ERR_MACRO_H
-#define A0_SRC_ERR_MACRO_H
-
-#include "a0/err.h"
-#include "a0/inline.h"
-
-#include <errno.h>
-#include <stdarg.h>
-#include <stdbool.h>
-#include <stdio.h>
-
-A0_STATIC_INLINE
-a0_err_t A0_MAKE_SYSERR(int syserr) {
-  a0_err_syscode = syserr;
-  return A0_ERR_SYS;
-}
-
-A0_STATIC_INLINE
-int A0_SYSERR(a0_err_t err) {
-  return err == A0_ERR_SYS ? a0_err_syscode : 0;
-}
-
-A0_STATIC_INLINE_RECURSIVE
-a0_err_t A0_MAKE_MSGERR(const char* fmt, ...) {
-  va_list args;
-  va_start(args, fmt);
-  if (fmt) {
-    vsnprintf(a0_err_msg, sizeof(a0_err_msg), fmt, args);  // NOLINT(clang-analyzer-valist.Uninitialized): https://bugs.llvm.org/show_bug.cgi?id=41311
-    va_end(args);
-    return A0_ERR_CUSTOM_MSG;
-  }
-  va_end(args);
-  return A0_OK;
-}
-
-#define A0_RETURN_SYSERR_ON_MINUS_ONE(X) \
-  do {                                   \
-    if ((X) == -1) {                     \
-      a0_err_syscode = errno;            \
-      return A0_ERR_SYS;                 \
-    }                                    \
-  } while (0)
-
-#define A0_RETURN_ERR_ON_ERR(X) \
-  do {                          \
-    a0_err_t _err = (X);        \
-    if (_err) {                 \
-      return _err;              \
-    }                           \
-  } while (0)
-
-#endif  // A0_SRC_ERR_MACRO_H
diff --git a/src/libipc/platform/linux/a0/ftx.h b/src/libipc/platform/linux/a0/ftx.h
deleted file mode 100644
index d0d4c3dc..00000000
--- a/src/libipc/platform/linux/a0/ftx.h
+++ /dev/null
@@ -1,111 +0,0 @@
-#ifndef A0_SRC_FTX_H
-#define A0_SRC_FTX_H
-
-#include "a0/err.h"
-#include "a0/inline.h"
-#include "a0/time.h"
-
-#include <limits.h>
-#include <linux/futex.h>
-#include <stdint.h>
-#include <syscall.h>
-#include <time.h>
-#include <unistd.h>
-
-#include "clock.h"
-#include "err_macro.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// FUTEX_WAIT and FUTEX_WAIT_REQUEUE_PI default to CLOCK_MONOTONIC,
-// but FUTEX_LOCK_PI always uses CLOCK_REALTIME.
-//
-// Until someone tells me otherwise, I assume this is bad decision making
-// and I will instead standardize all things on CLOCK_BOOTTIME.
-
-// Futex.
-// Operations rely on the address.
-// It should not be copied or moved.
-typedef uint32_t a0_ftx_t;
-
-A0_STATIC_INLINE
-a0_err_t a0_futex(a0_ftx_t* uaddr,
-                  int futex_op,
-                  int val,
-                  uintptr_t timeout_or_val2,
-                  a0_ftx_t* uaddr2,
-                  int val3) {
-  A0_RETURN_SYSERR_ON_MINUS_ONE(syscall(SYS_futex, uaddr, futex_op, val, timeout_or_val2, uaddr2, val3));
-  return A0_OK;
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_wait(a0_ftx_t* ftx, int confirm_val, const a0_time_mono_t* time_mono) {
-  if (!time_mono) {
-    return a0_futex(ftx, FUTEX_WAIT, confirm_val, 0, NULL, 0);
-  }
-
-  timespec_t ts_mono;
-  A0_RETURN_ERR_ON_ERR(a0_clock_convert(CLOCK_BOOTTIME, time_mono->ts, CLOCK_MONOTONIC, &ts_mono));
-  return a0_futex(ftx, FUTEX_WAIT, confirm_val, (uintptr_t)&ts_mono, NULL, 0);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_wake(a0_ftx_t* ftx, int cnt) {
-  return a0_futex(ftx, FUTEX_WAKE, cnt, 0, NULL, 0);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_signal(a0_ftx_t* ftx) {
-  return a0_ftx_wake(ftx, 1);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_broadcast(a0_ftx_t* ftx) {
-  return a0_ftx_wake(ftx, INT_MAX);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_lock_pi(a0_ftx_t* ftx, const a0_time_mono_t* time_mono) {
-  if (!time_mono) {
-    return a0_futex(ftx, FUTEX_LOCK_PI, 0, 0, NULL, 0);
-  }
-
-  timespec_t ts_wall;
-  A0_RETURN_ERR_ON_ERR(a0_clock_convert(CLOCK_BOOTTIME, time_mono->ts, CLOCK_REALTIME, &ts_wall));
-  return a0_futex(ftx, FUTEX_LOCK_PI, 0, (uintptr_t)&ts_wall, NULL, 0);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_trylock_pi(a0_ftx_t* ftx) {
-  return a0_futex(ftx, FUTEX_TRYLOCK_PI, 0, 0, NULL, 0);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_unlock_pi(a0_ftx_t* ftx) {
-  return a0_futex(ftx, FUTEX_UNLOCK_PI, 0, 0, NULL, 0);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_cmp_requeue_pi(a0_ftx_t* ftx, int confirm_val, a0_ftx_t* requeue_ftx, int max_requeue) {
-  return a0_futex(ftx, FUTEX_CMP_REQUEUE_PI, 1, max_requeue, requeue_ftx, confirm_val);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_wait_requeue_pi(a0_ftx_t* ftx, int confirm_val, const a0_time_mono_t* time_mono, a0_ftx_t* requeue_ftx) {
-  if (!time_mono) {
-    return a0_futex(ftx, FUTEX_WAIT_REQUEUE_PI, confirm_val, 0, requeue_ftx, 0);
-  }
-
-  timespec_t ts_mono;
-  A0_RETURN_ERR_ON_ERR(a0_clock_convert(CLOCK_BOOTTIME, time_mono->ts, CLOCK_MONOTONIC, &ts_mono));
-  return a0_futex(ftx, FUTEX_WAIT_REQUEUE_PI, confirm_val, (uintptr_t)&ts_mono, requeue_ftx, 0);
-}
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_SRC_FTX_H
diff --git a/src/libipc/platform/linux/a0/inline.h b/src/libipc/platform/linux/a0/inline.h
deleted file mode 100644
index a605540a..00000000
--- a/src/libipc/platform/linux/a0/inline.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef A0_INLINE_H
-#define A0_INLINE_H
-
-#define A0_STATIC_INLINE static inline __attribute__((always_inline))
-
-#define A0_STATIC_INLINE_RECURSIVE static inline
-
-#endif  // A0_INLINE_H
diff --git a/src/libipc/platform/linux/a0/mtx.c b/src/libipc/platform/linux/a0/mtx.c
deleted file mode 100644
index 00022b64..00000000
--- a/src/libipc/platform/linux/a0/mtx.c
+++ /dev/null
@@ -1,420 +0,0 @@
-#include "a0/err.h"
-#include "a0/inline.h"
-#include "a0/mtx.h"
-#include "a0/thread_local.h"
-#include "a0/tid.h"
-#include "a0/time.h"
-
-#include <errno.h>
-#include <limits.h>
-#include <linux/futex.h>
-#include <pthread.h>
-#include <stdbool.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <syscall.h>
-#include <time.h>
-#include <unistd.h>
-
-#include "atomic.h"
-#include "clock.h"
-#include "err_macro.h"
-#include "ftx.h"
-
-// TSAN is worth the pain of properly annotating our mutex.
-
-// clang-format off
-#if defined(__SANITIZE_THREAD__)
-  #define A0_TSAN_ENABLED
-#elif defined(__has_feature)
-  #if __has_feature(thread_sanitizer)
-    #define A0_TSAN_ENABLED
-  #endif
-#endif
-// clang-format on
-
-const unsigned __tsan_mutex_linker_init = 1 << 0;
-const unsigned __tsan_mutex_write_reentrant = 1 << 1;
-const unsigned __tsan_mutex_read_reentrant = 1 << 2;
-const unsigned __tsan_mutex_not_static = 1 << 8;
-const unsigned __tsan_mutex_read_lock = 1 << 3;
-const unsigned __tsan_mutex_try_lock = 1 << 4;
-const unsigned __tsan_mutex_try_lock_failed = 1 << 5;
-const unsigned __tsan_mutex_recursive_lock = 1 << 6;
-const unsigned __tsan_mutex_recursive_unlock = 1 << 7;
-
-#ifdef A0_TSAN_ENABLED
-
-void __tsan_mutex_create(void* addr, unsigned flags);
-void __tsan_mutex_destroy(void* addr, unsigned flags);
-void __tsan_mutex_pre_lock(void* addr, unsigned flags);
-void __tsan_mutex_post_lock(void* addr, unsigned flags, int recursion);
-int __tsan_mutex_pre_unlock(void* addr, unsigned flags);
-void __tsan_mutex_post_unlock(void* addr, unsigned flags);
-void __tsan_mutex_pre_signal(void* addr, unsigned flags);
-void __tsan_mutex_post_signal(void* addr, unsigned flags);
-void __tsan_mutex_pre_divert(void* addr, unsigned flags);
-void __tsan_mutex_post_divert(void* addr, unsigned flags);
-
-#else
-
-#define _u_ __attribute__((unused))
-
-A0_STATIC_INLINE void _u_ __tsan_mutex_create(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_destroy(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_pre_lock(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_post_lock(_u_ void* addr,
-                                                 _u_ unsigned flags,
-                                                 _u_ int recursion) {}
-A0_STATIC_INLINE int _u_ __tsan_mutex_pre_unlock(_u_ void* addr, _u_ unsigned flags) {
-  return 0;
-}
-A0_STATIC_INLINE void _u_ __tsan_mutex_post_unlock(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_pre_signal(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_post_signal(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_pre_divert(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_post_divert(_u_ void* addr, _u_ unsigned flags) {}
-
-#endif
-
-A0_THREAD_LOCAL bool a0_robust_init = false;
-
-A0_STATIC_INLINE
-void a0_robust_reset() {
-  a0_robust_init = 0;
-}
-
-A0_STATIC_INLINE
-void a0_robust_reset_atfork() {
-  pthread_atfork(NULL, NULL, &a0_robust_reset);
-}
-
-static pthread_once_t a0_robust_reset_atfork_once;
-
-typedef struct robust_list robust_list_t;
-typedef struct robust_list_head robust_list_head_t;
-
-A0_THREAD_LOCAL robust_list_head_t a0_robust_head;
-
-A0_STATIC_INLINE
-void robust_init() {
-  a0_robust_head.list.next = &a0_robust_head.list;
-  a0_robust_head.futex_offset = offsetof(a0_mtx_t, ftx);
-  a0_robust_head.list_op_pending = NULL;
-  syscall(SYS_set_robust_list, &a0_robust_head.list, sizeof(a0_robust_head));
-}
-
-A0_STATIC_INLINE
-void init_thread() {
-  if (a0_robust_init) {
-    return;
-  }
-
-  pthread_once(&a0_robust_reset_atfork_once, a0_robust_reset_atfork);
-  robust_init();
-  a0_robust_init = true;
-}
-
-A0_STATIC_INLINE
-void robust_op_start(a0_mtx_t* mtx) {
-  init_thread();
-  a0_robust_head.list_op_pending = (struct robust_list*)mtx;
-  a0_barrier();
-}
-
-A0_STATIC_INLINE
-void robust_op_end(a0_mtx_t* mtx) {
-  (void)mtx;
-  a0_barrier();
-  a0_robust_head.list_op_pending = NULL;
-}
-
-A0_STATIC_INLINE
-bool robust_is_head(a0_mtx_t* mtx) {
-  return mtx == (a0_mtx_t*)&a0_robust_head;
-}
-
-A0_STATIC_INLINE
-void robust_op_add(a0_mtx_t* mtx) {
-  a0_mtx_t* old_first = (a0_mtx_t*)a0_robust_head.list.next;
-
-  mtx->prev = (a0_mtx_t*)&a0_robust_head;
-  mtx->next = old_first;
-
-  a0_barrier();
-
-  a0_robust_head.list.next = (robust_list_t*)mtx;
-  if (!robust_is_head(old_first)) {
-    old_first->prev = mtx;
-  }
-}
-
-A0_STATIC_INLINE
-void robust_op_del(a0_mtx_t* mtx) {
-  a0_mtx_t* prev = mtx->prev;
-  a0_mtx_t* next = mtx->next;
-  prev->next = next;
-  if (!robust_is_head(next)) {
-    next->prev = prev;
-  }
-}
-
-A0_STATIC_INLINE
-uint32_t ftx_tid(a0_ftx_t ftx) {
-  return ftx & FUTEX_TID_MASK;
-}
-
-A0_STATIC_INLINE
-bool ftx_owner_died(a0_ftx_t ftx) {
-  return ftx & FUTEX_OWNER_DIED;
-}
-
-static const uint32_t FTX_NOTRECOVERABLE = FUTEX_TID_MASK | FUTEX_OWNER_DIED;
-
-A0_STATIC_INLINE
-bool ftx_notrecoverable(a0_ftx_t ftx) {
-  return (ftx & FTX_NOTRECOVERABLE) == FTX_NOTRECOVERABLE;
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_mtx_timedlock_robust(a0_mtx_t* mtx, const a0_time_mono_t* timeout) {
-  const uint32_t tid = a0_tid();
-
-  int syserr = EINTR;
-  while (syserr == EINTR) {
-    // Can't lock if borked.
-    if (ftx_notrecoverable(a0_atomic_load(&mtx->ftx))) {
-      return A0_MAKE_SYSERR(ENOTRECOVERABLE);
-    }
-
-    // Try to lock without kernel involvement.
-    if (a0_cas(&mtx->ftx, 0, tid)) {
-      return A0_OK;
-    }
-
-    // Ask the kernel to lock.
-    syserr = A0_SYSERR(a0_ftx_lock_pi(&mtx->ftx, timeout));
-  }
-
-  if (!syserr) {
-    if (ftx_owner_died(a0_atomic_load(&mtx->ftx))) {
-      return A0_MAKE_SYSERR(EOWNERDEAD);
-    }
-    return A0_OK;
-  }
-
-  return A0_MAKE_SYSERR(syserr);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_mtx_timedlock_impl(a0_mtx_t* mtx, const a0_time_mono_t* timeout) {
-  // Note: __tsan_mutex_pre_lock should come here, but tsan doesn't provide
-  //       a way to "fail" a lock. Only a trylock.
-  robust_op_start(mtx);
-  const a0_err_t err = a0_mtx_timedlock_robust(mtx, timeout);
-  if (!err || A0_SYSERR(err) == EOWNERDEAD) {
-    __tsan_mutex_pre_lock(mtx, 0);
-    robust_op_add(mtx);
-    __tsan_mutex_post_lock(mtx, 0, 0);
-  }
-  robust_op_end(mtx);
-  return err;
-}
-
-a0_err_t a0_mtx_timedlock(a0_mtx_t* mtx, a0_time_mono_t timeout) {
-  return a0_mtx_timedlock_impl(mtx, &timeout);
-}
-
-a0_err_t a0_mtx_lock(a0_mtx_t* mtx) {
-  return a0_mtx_timedlock_impl(mtx, NULL);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_mtx_trylock_impl(a0_mtx_t* mtx) {
-  const uint32_t tid = a0_tid();
-
-  // Try to lock without kernel involvement.
-  uint32_t old = a0_cas_val(&mtx->ftx, 0, tid);
-
-  // Did it work?
-  if (!old) {
-    robust_op_add(mtx);
-    return A0_OK;
-  }
-
-  // Is the lock still usable?
-  if (ftx_notrecoverable(old)) {
-    return A0_MAKE_SYSERR(ENOTRECOVERABLE);
-  }
-
-  // Is the owner still alive?
-  if (!ftx_owner_died(old)) {
-    return A0_MAKE_SYSERR(EBUSY);
-  }
-
-  // Oh, the owner died. Ask the kernel to fix the state.
-  a0_err_t err = a0_ftx_trylock_pi(&mtx->ftx);
-  if (!err) {
-    robust_op_add(mtx);
-    if (ftx_owner_died(a0_atomic_load(&mtx->ftx))) {
-      return A0_MAKE_SYSERR(EOWNERDEAD);
-    }
-    return A0_OK;
-  }
-
-  // EAGAIN means that somebody else beat us to it.
-  // Anything else means we're borked.
-  if (A0_SYSERR(err) == EAGAIN) {
-    return A0_MAKE_SYSERR(EBUSY);
-  }
-  return A0_MAKE_SYSERR(ENOTRECOVERABLE);
-}
-
-a0_err_t a0_mtx_trylock(a0_mtx_t* mtx) {
-  __tsan_mutex_pre_lock(mtx, __tsan_mutex_try_lock);
-  robust_op_start(mtx);
-  a0_err_t err = a0_mtx_trylock_impl(mtx);
-  robust_op_end(mtx);
-  if (!err || A0_SYSERR(err) == EOWNERDEAD) {
-    __tsan_mutex_post_lock(mtx, __tsan_mutex_try_lock, 0);
-  } else {
-    __tsan_mutex_post_lock(mtx, __tsan_mutex_try_lock | __tsan_mutex_try_lock_failed, 0);
-  }
-  return err;
-}
-
-a0_err_t a0_mtx_consistent(a0_mtx_t* mtx) {
-  const uint32_t val = a0_atomic_load(&mtx->ftx);
-
-  // Why fix what isn't broken?
-  if (!ftx_owner_died(val)) {
-    return A0_MAKE_SYSERR(EINVAL);
-  }
-
-  // Is it yours to fix?
-  if (ftx_tid(val) != a0_tid()) {
-    return A0_MAKE_SYSERR(EPERM);
-  }
-
-  // Fix it!
-  a0_atomic_and_fetch(&mtx->ftx, ~FUTEX_OWNER_DIED);
-
-  return A0_OK;
-}
-
-a0_err_t a0_mtx_unlock(a0_mtx_t* mtx) {
-  const uint32_t tid = a0_tid();
-
-  const uint32_t val = a0_atomic_load(&mtx->ftx);
-
-  // Only the owner can unlock.
-  if (ftx_tid(val) != tid) {
-    return A0_MAKE_SYSERR(EPERM);
-  }
-
-  __tsan_mutex_pre_unlock(mtx, 0);
-
-  // If the mutex was acquired with EOWNERDEAD, the caller is responsible
-  // for fixing the state and marking the mutex consistent. If they did
-  // not mark it consistent and are unlocking... then we are unrecoverably
-  // borked!
-  uint32_t new_val = 0;
-  if (ftx_owner_died(val)) {
-    new_val = FTX_NOTRECOVERABLE;
-  }
-
-  robust_op_start(mtx);
-  robust_op_del(mtx);
-
-  // If the futex is exactly equal to tid, then there are no waiters and the
-  // kernel doesn't need to get involved.
-  if (!a0_cas(&mtx->ftx, tid, new_val)) {
-    // Ask the kernel to wake up a waiter.
-    a0_ftx_unlock_pi(&mtx->ftx);
-    if (new_val) {
-      a0_atomic_or_fetch(&mtx->ftx, new_val);
-    }
-  }
-
-  robust_op_end(mtx);
-  __tsan_mutex_post_unlock(mtx, 0);
-
-  return A0_OK;
-}
-
-// TODO(lshamis): Handle ENOTRECOVERABLE
-A0_STATIC_INLINE
-a0_err_t a0_cnd_timedwait_impl(a0_cnd_t* cnd, a0_mtx_t* mtx, const a0_time_mono_t* timeout) {
-  const uint32_t init_cnd = a0_atomic_load(cnd);
-
-  // Unblock other threads to do the things that will eventually signal this wait.
-  a0_err_t err = a0_mtx_unlock(mtx);
-  if (err) {
-    return err;
-  }
-
-  __tsan_mutex_pre_lock(mtx, 0);
-  robust_op_start(mtx);
-
-  do {
-    // Priority-inheritance-aware wait until awoken or timeout.
-    err = a0_ftx_wait_requeue_pi(cnd, init_cnd, timeout, &mtx->ftx);
-  } while (A0_SYSERR(err) == EINTR);
-
-  // We need to manually lock on timeout.
-  // Note: We keep the timeout error.
-  if (A0_SYSERR(err) == ETIMEDOUT) {
-    a0_mtx_timedlock_robust(mtx, NULL);
-  }
-  // Someone else grabbed and mutated the resource between the unlock and wait.
-  // No need to wait.
-  if (A0_SYSERR(err) == EAGAIN) {
-    err = a0_mtx_timedlock_robust(mtx, NULL);
-  }
-
-  robust_op_add(mtx);
-
-  // If no higher priority error, check the previous owner didn't die.
-  if (!err) {
-    err = ftx_owner_died(a0_atomic_load(&mtx->ftx)) ? EOWNERDEAD : A0_OK;
-  }
-
-  robust_op_end(mtx);
-  __tsan_mutex_post_lock(mtx, 0, 0);
-  return err;
-}
-
-a0_err_t a0_cnd_timedwait(a0_cnd_t* cnd, a0_mtx_t* mtx, a0_time_mono_t timeout) {
-  // Let's not unlock the mutex if we're going to get EINVAL due to a bad timeout.
-  if ((timeout.ts.tv_sec < 0 || timeout.ts.tv_nsec < 0 || (!timeout.ts.tv_sec && !timeout.ts.tv_nsec) || timeout.ts.tv_nsec >= NS_PER_SEC)) {
-    return A0_MAKE_SYSERR(EINVAL);
-  }
-  return a0_cnd_timedwait_impl(cnd, mtx, &timeout);
-}
-
-a0_err_t a0_cnd_wait(a0_cnd_t* cnd, a0_mtx_t* mtx) {
-  return a0_cnd_timedwait_impl(cnd, mtx, NULL);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_cnd_wake(a0_cnd_t* cnd, a0_mtx_t* mtx, uint32_t cnt) {
-  uint32_t val = a0_atomic_add_fetch(cnd, 1);
-
-  while (true) {
-    a0_err_t err = a0_ftx_cmp_requeue_pi(cnd, val, &mtx->ftx, cnt);
-    if (A0_SYSERR(err) != EAGAIN) {
-      return err;
-    }
-
-    // Another thread is also trying to wake this condition variable.
-    val = a0_atomic_load(cnd);
-  }
-}
-
-a0_err_t a0_cnd_signal(a0_cnd_t* cnd, a0_mtx_t* mtx) {
-  return a0_cnd_wake(cnd, mtx, 1);
-}
-
-a0_err_t a0_cnd_broadcast(a0_cnd_t* cnd, a0_mtx_t* mtx) {
-  return a0_cnd_wake(cnd, mtx, INT_MAX);
-}
diff --git a/src/libipc/platform/linux/a0/mtx.h b/src/libipc/platform/linux/a0/mtx.h
deleted file mode 100644
index d27ce179..00000000
--- a/src/libipc/platform/linux/a0/mtx.h
+++ /dev/null
@@ -1,57 +0,0 @@
-#ifndef A0_MTX_H
-#define A0_MTX_H
-
-#include "a0/err.h"
-#include "a0/time.h"
-#include "a0/unused.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef uint32_t a0_ftx_t;
-
-// https://stackoverflow.com/questions/61645966/is-typedef-allowed-before-definition
-struct a0_mtx_s;
-
-typedef struct a0_mtx_s a0_mtx_t;
-
-// Mutex implementation designed for IPC.
-//
-// Similar to pthread_mutex_t with the following flags fixed:
-// * Process shared.
-// * Robust.
-// * Error checking.
-// * Priority inheriting.
-//
-// Unlike pthread_mutex_t, timespec are expected to use CLOCK_BOOTTIME.
-//
-// struct a0_mtx_s "Inherits" from robust_list, which requires:
-// * The first field MUST be a next pointer.
-// * There must be a futex, which makes the mutex immovable.
-//
-// Note: a mutex MUST be unlocked before being freed or unmapped.
-struct a0_mtx_s {
-  a0_mtx_t* next;
-  a0_mtx_t* prev;
-  a0_ftx_t ftx;
-};
-
-a0_err_t a0_mtx_lock(a0_mtx_t*) A0_WARN_UNUSED_RESULT;
-a0_err_t a0_mtx_timedlock(a0_mtx_t*, a0_time_mono_t) A0_WARN_UNUSED_RESULT;
-a0_err_t a0_mtx_trylock(a0_mtx_t*) A0_WARN_UNUSED_RESULT;
-a0_err_t a0_mtx_consistent(a0_mtx_t*);
-a0_err_t a0_mtx_unlock(a0_mtx_t*);
-
-typedef a0_ftx_t a0_cnd_t;
-
-a0_err_t a0_cnd_wait(a0_cnd_t*, a0_mtx_t*);
-a0_err_t a0_cnd_timedwait(a0_cnd_t*, a0_mtx_t*, a0_time_mono_t);
-a0_err_t a0_cnd_signal(a0_cnd_t*, a0_mtx_t*);
-a0_err_t a0_cnd_broadcast(a0_cnd_t*, a0_mtx_t*);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_MTX_H
diff --git a/src/libipc/platform/linux/a0/strconv.c b/src/libipc/platform/linux/a0/strconv.c
deleted file mode 100644
index 70eedbf8..00000000
--- a/src/libipc/platform/linux/a0/strconv.c
+++ /dev/null
@@ -1,64 +0,0 @@
-#include "strconv.h"
-
-#include "a0/err.h"
-
-#include <string.h>
-
-static const char DECIMAL_DIGITS[] =
-    "00010203040506070809"
-    "10111213141516171819"
-    "20212223242526272829"
-    "30313233343536373839"
-    "40414243444546474849"
-    "50515253545556575859"
-    "60616263646566676869"
-    "70717273747576777879"
-    "80818283848586878889"
-    "90919293949596979899";
-
-a0_err_t a0_u32_to_str(uint32_t val, char* buf_start, char* buf_end, char** start_ptr) {
-  return a0_u64_to_str(val, buf_start, buf_end, start_ptr);
-}
-
-a0_err_t a0_u64_to_str(uint64_t val, char* buf_start, char* buf_end, char** start_ptr) {
-  uint64_t orig_val = val;
-  char* ptr = buf_end;
-  while (val >= 10) {
-    ptr -= 2;
-    memcpy(ptr, &DECIMAL_DIGITS[2 * (val % 100)], sizeof(uint16_t));
-    val /= 100;
-  }
-  if (val) {
-    *--ptr = (char)('0' + val);
-  }
-  memset(buf_start, '0', ptr - buf_start);
-  ptr -= (!orig_val);
-  if (start_ptr) {
-    *start_ptr = ptr;
-  }
-  return A0_OK;
-}
-
-a0_err_t a0_str_to_u32(const char* start, const char* end, uint32_t* out) {
-  *out = 0;
-  for (const char* ptr = start; ptr < end; ptr++) {
-    if (*ptr < '0' || *ptr > '9') {
-      return A0_ERR_INVALID_ARG;
-    }
-    *out *= 10;
-    *out += *ptr - '0';
-  }
-  return A0_OK;
-}
-
-a0_err_t a0_str_to_u64(const char* start, const char* end, uint64_t* out) {
-  *out = 0;
-  for (const char* ptr = start; ptr < end; ptr++) {
-    if (*ptr < '0' || *ptr > '9') {
-      return A0_ERR_INVALID_ARG;
-    }
-    *out *= 10;
-    *out += *ptr - '0';
-  }
-  return A0_OK;
-}
diff --git a/src/libipc/platform/linux/a0/strconv.h b/src/libipc/platform/linux/a0/strconv.h
deleted file mode 100644
index 2f5b743a..00000000
--- a/src/libipc/platform/linux/a0/strconv.h
+++ /dev/null
@@ -1,31 +0,0 @@
-#ifndef A0_SRC_STRCONV_H
-#define A0_SRC_STRCONV_H
-
-#include "a0/err.h"
-
-#include <stdint.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// Converts a uint32 or uint64 to string.
-// The entire buffer will be populated, if not with given the value, then with '0'.
-// Populates the buffer from the back.
-// start_ptr, if not null, will be set to the point within the buffer where the number starts.
-// Does NOT check for overflow.
-a0_err_t a0_u32_to_str(uint32_t val, char* buf_start, char* buf_end, char** start_ptr);
-a0_err_t a0_u64_to_str(uint64_t val, char* buf_start, char* buf_end, char** start_ptr);
-
-// Converts a string to uint32 or uint64.
-// The string may have leading '0's.
-// Returns A0_ERR_INVALID_ARG if any character is not a digit.
-// Does NOT check for overflow.
-a0_err_t a0_str_to_u32(const char* start, const char* end, uint32_t* out);
-a0_err_t a0_str_to_u64(const char* start, const char* end, uint64_t* out);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_SRC_STRCONV_H
diff --git a/src/libipc/platform/linux/a0/thread_local.h b/src/libipc/platform/linux/a0/thread_local.h
deleted file mode 100644
index 8e498134..00000000
--- a/src/libipc/platform/linux/a0/thread_local.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#ifndef A0_THREAD_LOCAL_H
-#define A0_THREAD_LOCAL_H
-
-#ifdef __cplusplus
-#define A0_THREAD_LOCAL thread_local
-#else
-#define A0_THREAD_LOCAL _Thread_local
-#endif  // __cplusplus
-
-#endif  // A0_THREAD_LOCAL_H
diff --git a/src/libipc/platform/linux/a0/tid.c b/src/libipc/platform/linux/a0/tid.c
deleted file mode 100644
index 9ad016a7..00000000
--- a/src/libipc/platform/linux/a0/tid.c
+++ /dev/null
@@ -1,30 +0,0 @@
-#include "a0/inline.h"
-#include "a0/thread_local.h"
-#include "a0/tid.h"
-
-#include <pthread.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <syscall.h>
-#include <unistd.h>
-
-A0_THREAD_LOCAL uint32_t a0_tid_cache = 0;
-static pthread_once_t a0_tid_reset_atfork_once;
-
-A0_STATIC_INLINE
-void a0_tid_reset() {
-  a0_tid_cache = 0;
-}
-
-A0_STATIC_INLINE
-void a0_tid_reset_atfork() {
-  pthread_atfork(NULL, NULL, &a0_tid_reset);
-}
-
-uint32_t a0_tid() {
-  if (!a0_tid_cache) {
-    a0_tid_cache = syscall(SYS_gettid);
-    pthread_once(&a0_tid_reset_atfork_once, a0_tid_reset_atfork);
-  }
-  return a0_tid_cache;
-}
diff --git a/src/libipc/platform/linux/a0/tid.h b/src/libipc/platform/linux/a0/tid.h
deleted file mode 100644
index 11cb71cd..00000000
--- a/src/libipc/platform/linux/a0/tid.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#ifndef A0_TID_H
-#define A0_TID_H
-
-#include <stdint.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-uint32_t a0_tid();
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_TID_H
diff --git a/src/libipc/platform/linux/a0/time.c b/src/libipc/platform/linux/a0/time.c
deleted file mode 100644
index 09a79b4a..00000000
--- a/src/libipc/platform/linux/a0/time.c
+++ /dev/null
@@ -1,124 +0,0 @@
-#include "a0/empty.h"
-#include "a0/err.h"
-#include "a0/time.h"
-
-#include <stdint.h>
-#include <stdio.h>
-#include <string.h>
-#include <time.h>
-
-#include "clock.h"
-#include "err_macro.h"
-#include "strconv.h"
-
-const char A0_TIME_MONO[] = "a0_time_mono";
-
-a0_err_t a0_time_mono_now(a0_time_mono_t* out) {
-  return a0_clock_now(CLOCK_BOOTTIME, &out->ts);
-}
-
-a0_err_t a0_time_mono_str(a0_time_mono_t time_mono, char mono_str[20]) {
-  // Mono time as unsigned integer with up to 20 chars: "18446744072709551615"
-  uint64_t ns = time_mono.ts.tv_sec * NS_PER_SEC + time_mono.ts.tv_nsec;
-  mono_str[19] = '\0';
-  return a0_u64_to_str(ns, mono_str, mono_str + 19, NULL);
-}
-
-a0_err_t a0_time_mono_parse(const char mono_str[20], a0_time_mono_t* out) {
-  uint64_t ns;
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u64(mono_str, mono_str + 19, &ns));
-  out->ts.tv_sec = ns / NS_PER_SEC;
-  out->ts.tv_nsec = ns % NS_PER_SEC;
-  return A0_OK;
-}
-
-a0_err_t a0_time_mono_add(a0_time_mono_t time_mono, int64_t add_nsec, a0_time_mono_t* out) {
-  return a0_clock_add(time_mono.ts, add_nsec, &out->ts);
-}
-
-const char A0_TIME_WALL[] = "a0_time_wall";
-
-a0_err_t a0_time_wall_now(a0_time_wall_t* out) {
-  A0_RETURN_SYSERR_ON_MINUS_ONE(clock_gettime(CLOCK_REALTIME, &out->ts));
-  return A0_OK;
-}
-
-a0_err_t a0_time_wall_str(a0_time_wall_t wall_time, char wall_str[36]) {
-  // Wall time in RFC 3999 Nano: "2006-01-02T15:04:05.999999999-07:00"
-  struct tm wall_tm;
-  gmtime_r(&wall_time.ts.tv_sec, &wall_tm);
-
-  strftime(&wall_str[0], 20, "%Y-%m-%dT%H:%M:%S", &wall_tm);
-  snprintf(&wall_str[19], 17, ".%09ld-00:00", wall_time.ts.tv_nsec);
-  wall_str[35] = '\0';
-
-  return A0_OK;
-}
-
-a0_err_t a0_time_wall_parse(const char wall_str[36], a0_time_wall_t* out) {
-  // strptime requires _GNU_SOURCE, which we don't want, so we do it our selves.
-  // Hard code "%Y-%m-%dT%H:%M:%S" + ".%09ld-00:00" pattern.
-
-  struct tm wall_tm = A0_EMPTY;
-  // %Y
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u32(wall_str + 0, wall_str + 4, (uint32_t*)&wall_tm.tm_year));
-  wall_tm.tm_year -= 1900;
-  // -
-  if (wall_str[4] != '-') {
-    return A0_ERR_INVALID_ARG;
-  }
-  // %m
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u32(wall_str + 5, wall_str + 7, (uint32_t*)&wall_tm.tm_mon));
-  if (wall_tm.tm_mon < 1 || wall_tm.tm_mon > 12) {
-    return A0_ERR_INVALID_ARG;
-  }
-  wall_tm.tm_mon--;
-  // -
-  if (wall_str[7] != '-') {
-    return A0_ERR_INVALID_ARG;
-  }
-  // %d
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u32(wall_str + 8, wall_str + 10, (uint32_t*)&wall_tm.tm_mday));
-  if (wall_tm.tm_mday < 1 || wall_tm.tm_mday > 31) {
-    return A0_ERR_INVALID_ARG;
-  }
-  // T
-  if (wall_str[10] != 'T') {
-    return A0_ERR_INVALID_ARG;
-  }
-  // %H
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u32(wall_str + 11, wall_str + 13, (uint32_t*)&wall_tm.tm_hour));
-  if (wall_tm.tm_hour > 24) {
-    return A0_ERR_INVALID_ARG;
-  }
-  // :
-  if (wall_str[13] != ':') {
-    return A0_ERR_INVALID_ARG;
-  }
-  // %M
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u32(wall_str + 14, wall_str + 16, (uint32_t*)&wall_tm.tm_min));
-  if (wall_tm.tm_min > 60) {
-    return A0_ERR_INVALID_ARG;
-  }
-  // :
-  if (wall_str[16] != ':') {
-    return A0_ERR_INVALID_ARG;
-  }
-  // %S
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u32(wall_str + 17, wall_str + 19, (uint32_t*)&wall_tm.tm_sec));
-  if (wall_tm.tm_sec > 61) {
-    return A0_ERR_INVALID_ARG;
-  }
-  // .
-  if (wall_str[19] != '.') {
-    return A0_ERR_INVALID_ARG;
-  }
-
-  if (memcmp(wall_str + 29, "-00:00", 6) != 0) {
-    return A0_ERR_INVALID_ARG;
-  }
-
-  // Use timegm, cause it's a pain to compute months/years to seconds.
-  out->ts.tv_sec = timegm(&wall_tm);
-  return a0_str_to_u64(wall_str + 20, wall_str + 29, (uint64_t*)&out->ts.tv_nsec);
-}
diff --git a/src/libipc/platform/linux/a0/time.h b/src/libipc/platform/linux/a0/time.h
deleted file mode 100644
index 77e49c4d..00000000
--- a/src/libipc/platform/linux/a0/time.h
+++ /dev/null
@@ -1,97 +0,0 @@
-/**
- * \file time.h
- * \rst
- *
- * Mono Time
- * ---------
- *
- * | Mono time is a number of nanoseconds from machine boottime.
- * | This time cannot decrease and duration between ticks is constant.
- * | This time is not related to wall clock time.
- * | This time is most suitable for measuring durations.
- * |
- * | As a string, it is represented as a 20 char number:
- * | **18446744072709551615**
- * |
- * | Note that this uses CLOCK_BOOTTIME under the hood, not CLOCK_MONOTONIC.
- *
- * Wall Time
- * ---------
- *
- * | Wall time is an time object representing human-readable wall clock time.
- * | This time can decrease and duration between ticks is not constant.
- * | This time is most related to wall clock time.
- * | This time is not suitable for measuring durations.
- * |
- * | As a string, it is represented as a 36 char RFC 3999 Nano / ISO 8601:
- * | **2006-01-02T15:04:05.999999999-07:00**
- *
- * \endrst
- */
-
-#ifndef A0_TIME_H
-#define A0_TIME_H
-
-#include "a0/err.h"
-
-#include <stdint.h>
-#include <time.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** \addtogroup TIME_MONO
- *  @{
- */
-
-/// Header key for mono timestamps.
-extern const char A0_TIME_MONO[];
-
-/// Monotonic timestamp. Despite the name, uses CLOCK_BOOTTIME.
-typedef struct a0_time_mono_s {
-  struct timespec ts;
-} a0_time_mono_t;
-
-/// Get the current mono timestamps.
-a0_err_t a0_time_mono_now(a0_time_mono_t*);
-
-/// Stringify a given mono timestamps.
-a0_err_t a0_time_mono_str(a0_time_mono_t, char mono_str[20]);
-
-/// Parse a stringified mono timestamps.
-a0_err_t a0_time_mono_parse(const char mono_str[20], a0_time_mono_t*);
-
-/// Add a duration in nanoseconds to a mono timestamp.
-a0_err_t a0_time_mono_add(a0_time_mono_t, int64_t add_nsec, a0_time_mono_t*);
-
-/** @}*/
-
-/** \addtogroup TIME_WALL
- *  @{
- */
-
-/// Header key for wall timestamps.
-extern const char A0_TIME_WALL[];
-
-/// Wall clock timestamp.
-typedef struct a0_time_wall_s {
-  struct timespec ts;
-} a0_time_wall_t;
-
-/// Get the current wall timestamps.
-a0_err_t a0_time_wall_now(a0_time_wall_t*);
-
-/// Stringify a given wall timestamps.
-a0_err_t a0_time_wall_str(a0_time_wall_t, char wall_str[36]);
-
-/// Parse a stringified wall timestamps.
-a0_err_t a0_time_wall_parse(const char wall_str[36], a0_time_wall_t*);
-
-/** @}*/
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_TRANSPORT_H
diff --git a/src/libipc/platform/linux/a0/unused.h b/src/libipc/platform/linux/a0/unused.h
deleted file mode 100644
index 8b1025a4..00000000
--- a/src/libipc/platform/linux/a0/unused.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef A0_UNUSED_H
-#define A0_UNUSED_H
-
-#define A0_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
-#define A0_MAYBE_UNUSED(X) ((void)(X))
-
-#endif  // A0_UNUSED_H
diff --git a/src/libipc/platform/linux/condition.h b/src/libipc/platform/linux/condition.h
deleted file mode 100644
index c4f00ca7..00000000
--- a/src/libipc/platform/linux/condition.h
+++ /dev/null
@@ -1,66 +0,0 @@
-#pragma once
-
-#include "libipc/utility/log.h"
-#include "libipc/mutex.h"
-
-#include "get_wait_time.h"
-#include "sync_obj_impl.h"
-
-#include "a0/err_macro.h"
-#include "a0/mtx.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class condition : public sync::obj_impl<a0_cnd_t> {
-public:
-    condition() = default;
-    ~condition() = default;
-
-    bool wait(ipc::sync::mutex &mtx, std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        if (tm == invalid_value) {
-            int eno = A0_SYSERR(a0_cnd_wait(native(), static_cast<a0_mtx_t *>(mtx.native())));
-            if (eno != 0) {
-                ipc::error("fail condition wait[%d]\n", eno);
-                return false;
-            }
-        } else {
-            auto ts = detail::make_timespec(tm);
-            int eno = A0_SYSERR(a0_cnd_timedwait(native(), static_cast<a0_mtx_t *>(mtx.native()), {ts}));
-            if (eno != 0) {
-                if (eno != ETIMEDOUT) {
-                    ipc::error("fail condition timedwait[%d]: tm = %zd, tv_sec = %ld, tv_nsec = %ld\n",
-                                eno, tm, ts.tv_sec, ts.tv_nsec);
-                }
-                return false;
-            }
-        }
-        return true;
-    }
-
-    bool notify(ipc::sync::mutex &mtx) noexcept {
-        if (!valid()) return false;
-        int eno = A0_SYSERR(a0_cnd_signal(native(), static_cast<a0_mtx_t *>(mtx.native())));
-        if (eno != 0) {
-            ipc::error("fail condition notify[%d]\n", eno);
-            return false;
-        }
-        return true;
-    }
-
-    bool broadcast(ipc::sync::mutex &mtx) noexcept {
-        if (!valid()) return false;
-        int eno = A0_SYSERR(a0_cnd_broadcast(native(), static_cast<a0_mtx_t *>(mtx.native())));
-        if (eno != 0) {
-            ipc::error("fail condition broadcast[%d]\n", eno);
-            return false;
-        }
-        return true;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/linux/get_wait_time.h b/src/libipc/platform/linux/get_wait_time.h
deleted file mode 100644
index ffaf2d29..00000000
--- a/src/libipc/platform/linux/get_wait_time.h
+++ /dev/null
@@ -1,46 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include <cinttypes>
-#include <system_error>
-
-#include "libipc/utility/log.h"
-
-#include "a0/time.h"
-#include "a0/err_macro.h"
-
-namespace ipc {
-namespace detail {
-
-inline bool calc_wait_time(timespec &ts, std::uint64_t tm /*ms*/) noexcept {
-    std::int64_t add_ns = static_cast<std::int64_t>(tm * 1000000ull);
-    if (add_ns < 0) {
-        ipc::error("invalid time = " PRIu64 "\n", tm);
-        return false;
-    }
-    a0_time_mono_t now;
-    int eno = A0_SYSERR(a0_time_mono_now(&now));
-    if (eno != 0) {
-        ipc::error("fail get time[%d]\n", eno);
-        return false;
-    }
-    a0_time_mono_t *target = reinterpret_cast<a0_time_mono_t *>(&ts);
-    if ((eno = A0_SYSERR(a0_time_mono_add(now, add_ns, target))) != 0) {
-        ipc::error("fail get time[%d]\n", eno);
-        return false;
-    }
-    return true;
-}
-
-inline timespec make_timespec(std::uint64_t tm /*ms*/) noexcept(false) {
-    timespec ts {};
-    if (!calc_wait_time(ts, tm)) {
-        ipc::error("fail calc_wait_time: tm = %zd, tv_sec = %ld, tv_nsec = %ld\n",
-                    tm, ts.tv_sec, ts.tv_nsec);
-        throw std::system_error{static_cast<int>(errno), std::system_category()};
-    }
-    return ts;
-}
-
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/linux/mutex.h b/src/libipc/platform/linux/mutex.h
deleted file mode 100644
index 91f156b4..00000000
--- a/src/libipc/platform/linux/mutex.h
+++ /dev/null
@@ -1,204 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include <system_error>
-#include <mutex>
-#include <atomic>
-
-#include "libipc/platform/detail.h"
-#include "libipc/utility/log.h"
-#include "libipc/memory/resource.h"
-#include "libipc/shm.h"
-
-#include "get_wait_time.h"
-#include "sync_obj_impl.h"
-
-#include "a0/err_macro.h"
-#include "a0/mtx.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class robust_mutex : public sync::obj_impl<a0_mtx_t> {
-public:
-    bool lock(std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        for (;;) {
-            auto ts = detail::make_timespec(tm);
-            int eno = A0_SYSERR(
-                (tm == invalid_value) ? a0_mtx_lock(native()) 
-                                      : a0_mtx_timedlock(native(), {ts}));
-            switch (eno) {
-            case 0:
-                return true;
-            case ETIMEDOUT:
-                return false;
-            case EOWNERDEAD: {
-                    int eno2 = A0_SYSERR(a0_mtx_consistent(native()));
-                    if (eno2 != 0) {
-                        ipc::error("fail mutex lock[%d] -> consistent[%d]\n", eno, eno2);
-                        return false;
-                    }
-                    int eno3 = A0_SYSERR(a0_mtx_unlock(native()));
-                    if (eno3 != 0) {
-                        ipc::error("fail mutex lock[%d] -> unlock[%d]\n", eno, eno3);
-                        return false;
-                    }
-                }
-                break; // loop again
-            default:
-                ipc::error("fail mutex lock[%d]\n", eno);
-                return false;
-            }
-        }
-    }
-
-    bool try_lock() noexcept(false) {
-        if (!valid()) return false;
-        int eno = A0_SYSERR(a0_mtx_timedlock(native(), {detail::make_timespec(0)}));
-        switch (eno) {
-        case 0:
-            return true;
-        case ETIMEDOUT:
-            return false;
-        case EOWNERDEAD: {
-                int eno2 = A0_SYSERR(a0_mtx_consistent(native()));
-                if (eno2 != 0) {
-                    ipc::error("fail mutex try_lock[%d] -> consistent[%d]\n", eno, eno2);
-                    break;
-                }
-                int eno3 = A0_SYSERR(a0_mtx_unlock(native()));
-                if (eno3 != 0) {
-                    ipc::error("fail mutex try_lock[%d] -> unlock[%d]\n", eno, eno3);
-                    break;
-                }
-            }
-            break;
-        default:
-            ipc::error("fail mutex try_lock[%d]\n", eno);
-            break;
-        }
-        throw std::system_error{eno, std::system_category()};
-    }
-
-    bool unlock() noexcept {
-        if (!valid()) return false;
-        int eno = A0_SYSERR(a0_mtx_unlock(native()));
-        if (eno != 0) {
-            ipc::error("fail mutex unlock[%d]\n", eno);
-            return false;
-        }
-        return true;
-    }
-};
-
-class mutex {
-    robust_mutex *mutex_ = nullptr;
-    std::atomic<std::int32_t> *ref_ = nullptr;
-
-    struct curr_prog {
-        struct shm_data {
-            robust_mutex mtx;
-            std::atomic<std::int32_t> ref;
-
-            struct init {
-                char const *name;
-            };
-            shm_data(init arg)
-                : mtx{}, ref{0} { mtx.open(arg.name); }
-        };
-        ipc::map<ipc::string, shm_data> mutex_handles;
-        std::mutex lock;
-
-        static curr_prog &get() {
-            static curr_prog info;
-            return info;
-        }
-    };
-
-    void acquire_mutex(char const *name) {
-        if (name == nullptr) {
-            return;
-        }
-        auto &info = curr_prog::get();
-        IPC_UNUSED_ std::lock_guard<std::mutex> guard {info.lock};
-        auto it = info.mutex_handles.find(name);
-        if (it == info.mutex_handles.end()) {
-            it = curr_prog::get().mutex_handles.emplace(name, 
-                              curr_prog::shm_data::init{name}).first;
-        }
-        mutex_ = &it->second.mtx;
-        ref_   = &it->second.ref;
-    }
-
-    template <typename F>
-    void release_mutex(ipc::string const &name, F &&clear) {
-        if (name.empty()) return;
-        IPC_UNUSED_ std::lock_guard<std::mutex> guard {curr_prog::get().lock};
-        auto it = curr_prog::get().mutex_handles.find(name);
-        if (it == curr_prog::get().mutex_handles.end()) {
-            return;
-        }
-        if (clear()) {
-            curr_prog::get().mutex_handles.erase(it);
-        }
-    }
-
-public:
-    mutex() = default;
-    ~mutex() = default;
-
-    a0_mtx_t const *native() const noexcept {
-        return valid() ? mutex_->native() : nullptr;
-    }
-
-    a0_mtx_t *native() noexcept {
-        return valid() ? mutex_->native() : nullptr;
-    }
-
-    bool valid() const noexcept {
-        return (mutex_ != nullptr) && (ref_ != nullptr) && mutex_->valid();
-    }
-
-    bool open(char const *name) noexcept {
-        close();
-        acquire_mutex(name);
-        if (!valid()) {
-            return false;
-        }
-        ref_->fetch_add(1, std::memory_order_relaxed);
-        return true;
-    }
-
-    void close() noexcept {
-        if ((mutex_ != nullptr) && (ref_ != nullptr)) {
-            if (mutex_->name() != nullptr) {
-                release_mutex(mutex_->name(), [this] {
-                    return ref_->fetch_sub(1, std::memory_order_relaxed) <= 1;
-                });
-            } else mutex_->close();
-        }
-        mutex_ = nullptr;
-        ref_   = nullptr;
-    }
-
-    bool lock(std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        return mutex_->lock(tm);
-    }
-
-    bool try_lock() noexcept(false) {
-        if (!valid()) return false;
-        return mutex_->try_lock();
-    }
-
-    bool unlock() noexcept {
-        if (!valid()) return false;
-        return mutex_->unlock();
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/linux/sync_obj_impl.h b/src/libipc/platform/linux/sync_obj_impl.h
deleted file mode 100644
index e28f95dc..00000000
--- a/src/libipc/platform/linux/sync_obj_impl.h
+++ /dev/null
@@ -1,69 +0,0 @@
-#pragma once
-
-#include "libipc/utility/log.h"
-#include "libipc/shm.h"
-
-#include "a0/empty.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-template <typename SyncT>
-class obj_impl {
-public:
-    using sync_t = SyncT;
-
-protected:
-    ipc::shm::handle shm_;
-    sync_t *h_ = nullptr;
-
-    sync_t *acquire_handle(char const *name) {
-        if (!shm_.acquire(name, sizeof(sync_t))) {
-            ipc::error("[acquire_handle] fail shm.acquire: %s\n", name);
-            return nullptr;
-        }
-        return static_cast<sync_t *>(shm_.get());
-    }
-
-public:
-    obj_impl() = default;
-    ~obj_impl() = default;
-
-    sync_t const *native() const noexcept {
-        return h_;
-    }
-
-    sync_t *native() noexcept {
-        return h_;
-    }
-
-    char const *name() const noexcept {
-        return shm_.name();
-    }
-
-    bool valid() const noexcept {
-        return h_ != nullptr;
-    }
-
-    bool open(char const *name) noexcept {
-        close();
-        if ((h_ = acquire_handle(name)) == nullptr) {
-            return false;
-        }
-        if (shm_.ref() > 1) {
-            return true;
-        }
-        *h_ = A0_EMPTY;
-        return true;
-    }
-
-    void close() noexcept {
-        shm_.release();
-        h_ = nullptr;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/platform.c b/src/libipc/platform/platform.c
deleted file mode 100644
index 49cc977b..00000000
--- a/src/libipc/platform/platform.c
+++ /dev/null
@@ -1,13 +0,0 @@
-
-#include "libipc/platform/detail.h"
-#if defined(IPC_OS_WINDOWS_)
-#elif defined(IPC_OS_LINUX_)
-#include "libipc/platform/linux/a0/err.c"
-#include "libipc/platform/linux/a0/mtx.c"
-#include "libipc/platform/linux/a0/strconv.c"
-#include "libipc/platform/linux/a0/tid.c"
-#include "libipc/platform/linux/a0/time.c"
-#elif defined(IPC_OS_QNX_)
-#else/*IPC_OS*/
-#   error "Unsupported platform."
-#endif
diff --git a/src/libipc/platform/platform.cpp b/src/libipc/platform/platform.cpp
deleted file mode 100644
index b77cbc97..00000000
--- a/src/libipc/platform/platform.cpp
+++ /dev/null
@@ -1,9 +0,0 @@
-
-#include "libipc/platform/detail.h"
-#if defined(IPC_OS_WINDOWS_)
-#include "libipc/platform/win/shm_win.cpp"
-#elif defined(IPC_OS_LINUX_) || defined(IPC_OS_QNX_)
-#include "libipc/platform/posix/shm_posix.cpp"
-#else/*IPC_OS*/
-#   error "Unsupported platform."
-#endif
diff --git a/src/libipc/platform/posix/condition.h b/src/libipc/platform/posix/condition.h
deleted file mode 100644
index d283d687..00000000
--- a/src/libipc/platform/posix/condition.h
+++ /dev/null
@@ -1,141 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include <cstring>
-
-#include <pthread.h>
-
-#include "libipc/utility/log.h"
-#include "libipc/utility/scope_guard.h"
-#include "libipc/mutex.h"
-#include "libipc/shm.h"
-
-#include "get_wait_time.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class condition {
-    ipc::shm::handle shm_;
-    pthread_cond_t *cond_ = nullptr;
-
-    pthread_cond_t *acquire_cond(char const *name) {
-        if (!shm_.acquire(name, sizeof(pthread_cond_t))) {
-            ipc::error("[acquire_cond] fail shm.acquire: %s\n", name);
-            return nullptr;
-        }
-        return static_cast<pthread_cond_t *>(shm_.get());
-    }
-
-public:
-    condition() = default;
-    ~condition() = default;
-
-    pthread_cond_t const *native() const noexcept {
-        return cond_;
-    }
-
-    pthread_cond_t *native() noexcept {
-        return cond_;
-    }
-
-    bool valid() const noexcept {
-        static const char tmp[sizeof(pthread_cond_t)] {};
-        return (cond_ != nullptr)
-            && (std::memcmp(tmp, cond_, sizeof(pthread_cond_t)) != 0);
-    }
-
-    bool open(char const *name) noexcept {
-        close();
-        if ((cond_ = acquire_cond(name)) == nullptr) {
-            return false;
-        }
-        if (shm_.ref() > 1) {
-            return valid();
-        }
-        ::pthread_cond_destroy(cond_);
-        auto finally = ipc::guard([this] { close(); }); // close when failed
-        // init condition
-        int eno;
-        pthread_condattr_t cond_attr;
-        if ((eno = ::pthread_condattr_init(&cond_attr)) != 0) {
-            ipc::error("fail pthread_condattr_init[%d]\n", eno);
-            return false;
-        }
-        IPC_UNUSED_ auto guard_cond_attr = guard([&cond_attr] { ::pthread_condattr_destroy(&cond_attr); });
-        if ((eno = ::pthread_condattr_setpshared(&cond_attr, PTHREAD_PROCESS_SHARED)) != 0) {
-            ipc::error("fail pthread_condattr_setpshared[%d]\n", eno);
-            return false;
-        }
-        *cond_ = PTHREAD_COND_INITIALIZER;
-        if ((eno = ::pthread_cond_init(cond_, &cond_attr)) != 0) {
-            ipc::error("fail pthread_cond_init[%d]\n", eno);
-            return false;
-        }
-        finally.dismiss();
-        return valid();
-    }
-
-    void close() noexcept {
-        if ((shm_.ref() <= 1) && cond_ != nullptr) {
-            int eno;
-            if ((eno = ::pthread_cond_destroy(cond_)) != 0) {
-                ipc::error("fail pthread_cond_destroy[%d]\n", eno);
-            }
-        }
-        shm_.release();
-        cond_ = nullptr;
-    }
-
-    bool wait(ipc::sync::mutex &mtx, std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        switch (tm) {
-        case invalid_value: {
-                int eno;
-                if ((eno = ::pthread_cond_wait(cond_, static_cast<pthread_mutex_t *>(mtx.native()))) != 0) {
-                    ipc::error("fail pthread_cond_wait[%d]\n", eno);
-                    return false;
-                }
-            }
-            break;
-        default: {
-                auto ts = detail::make_timespec(tm);
-                int eno;
-                if ((eno = ::pthread_cond_timedwait(cond_, static_cast<pthread_mutex_t *>(mtx.native()), &ts)) != 0) {
-                    if (eno != ETIMEDOUT) {
-                        ipc::error("fail pthread_cond_timedwait[%d]: tm = %zd, tv_sec = %ld, tv_nsec = %ld\n",
-                                   eno, tm, ts.tv_sec, ts.tv_nsec);
-                    }
-                    return false;
-                }
-            }
-            break;
-        }
-        return true;
-    }
-
-    bool notify(ipc::sync::mutex &) noexcept {
-        if (!valid()) return false;
-        int eno;
-        if ((eno = ::pthread_cond_signal(cond_)) != 0) {
-            ipc::error("fail pthread_cond_signal[%d]\n", eno);
-            return false;
-        }
-        return true;
-    }
-
-    bool broadcast(ipc::sync::mutex &) noexcept {
-        if (!valid()) return false;
-        int eno;
-        if ((eno = ::pthread_cond_broadcast(cond_)) != 0) {
-            ipc::error("fail pthread_cond_broadcast[%d]\n", eno);
-            return false;
-        }
-        return true;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/posix/get_error.h b/src/libipc/platform/posix/get_error.h
deleted file mode 100644
index c552f226..00000000
--- a/src/libipc/platform/posix/get_error.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#pragma once
-
-#include <errno.h>
-#include <string.h>
-
-namespace ipc {
-namespace detail {
-
-inline char const *curr_error() noexcept {
-    return ::strerror(errno);
-}
-
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/posix/get_wait_time.h b/src/libipc/platform/posix/get_wait_time.h
deleted file mode 100644
index 785cd754..00000000
--- a/src/libipc/platform/posix/get_wait_time.h
+++ /dev/null
@@ -1,39 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include <system_error>
-
-#include <sys/time.h>
-#include <time.h>
-#include <errno.h>
-
-#include "libipc/utility/log.h"
-
-namespace ipc {
-namespace detail {
-
-inline bool calc_wait_time(timespec &ts, std::uint64_t tm /*ms*/) noexcept {
-    timeval now;
-    int eno = ::gettimeofday(&now, NULL);
-    if (eno != 0) {
-        ipc::error("fail gettimeofday [%d]\n", eno);
-        return false;
-    }
-    ts.tv_nsec = (now.tv_usec + (tm % 1000) * 1000) * 1000;
-    ts.tv_sec  =  now.tv_sec  + (tm / 1000) + (ts.tv_nsec / 1000000000l);
-    ts.tv_nsec %= 1000000000l;
-    return true;
-}
-
-inline timespec make_timespec(std::uint64_t tm /*ms*/) noexcept(false) {
-    timespec ts {};
-    if (!calc_wait_time(ts, tm)) {
-        ipc::error("fail calc_wait_time: tm = %zd, tv_sec = %ld, tv_nsec = %ld\n",
-                    tm, ts.tv_sec, ts.tv_nsec);
-        throw std::system_error{static_cast<int>(errno), std::system_category()};
-    }
-    return ts;
-}
-
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/posix/mutex.h b/src/libipc/platform/posix/mutex.h
deleted file mode 100644
index 8f7525f0..00000000
--- a/src/libipc/platform/posix/mutex.h
+++ /dev/null
@@ -1,237 +0,0 @@
-#pragma once
-
-#include <cstring>
-#include <cassert>
-#include <cstdint>
-#include <system_error>
-#include <mutex>
-#include <atomic>
-
-#include <pthread.h>
-
-#include "libipc/platform/detail.h"
-#include "libipc/utility/log.h"
-#include "libipc/utility/scope_guard.h"
-#include "libipc/memory/resource.h"
-#include "libipc/shm.h"
-
-#include "get_wait_time.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class mutex {
-    ipc::shm::handle *shm_ = nullptr;
-    std::atomic<std::int32_t> *ref_ = nullptr;
-    pthread_mutex_t *mutex_ = nullptr;
-
-    struct curr_prog {
-        struct shm_data {
-            ipc::shm::handle shm;
-            std::atomic<std::int32_t> ref;
-
-            struct init {
-                char const *name;
-                std::size_t size;
-            };
-            shm_data(init arg)
-                : shm{arg.name, arg.size}, ref{0} {}
-        };
-        ipc::map<ipc::string, shm_data> mutex_handles;
-        std::mutex lock;
-
-        static curr_prog &get() {
-            static curr_prog info;
-            return info;
-        }
-    };
-
-    pthread_mutex_t *acquire_mutex(char const *name) {
-        if (name == nullptr) {
-            return nullptr;
-        }
-        auto &info = curr_prog::get();
-        IPC_UNUSED_ std::lock_guard<std::mutex> guard {info.lock};
-        auto it = info.mutex_handles.find(name);
-        if (it == info.mutex_handles.end()) {
-            it = curr_prog::get().mutex_handles.emplace(name, 
-                              curr_prog::shm_data::init{name, sizeof(pthread_mutex_t)}).first;
-        }
-        shm_ = &it->second.shm;
-        ref_ = &it->second.ref;
-        if (shm_ == nullptr) {
-            return nullptr;
-        }
-        return static_cast<pthread_mutex_t *>(shm_->get());
-    }
-
-    template <typename F>
-    void release_mutex(ipc::string const &name, F &&clear) {
-        if (name.empty()) return;
-        IPC_UNUSED_ std::lock_guard<std::mutex> guard {curr_prog::get().lock};
-        auto it = curr_prog::get().mutex_handles.find(name);
-        if (it == curr_prog::get().mutex_handles.end()) {
-            return;
-        }
-        if (clear()) {
-            curr_prog::get().mutex_handles.erase(it);
-        }
-    }
-
-public:
-    mutex() = default;
-    ~mutex() = default;
-
-    pthread_mutex_t const *native() const noexcept {
-        return mutex_;
-    }
-
-    pthread_mutex_t *native() noexcept {
-        return mutex_;
-    }
-
-    bool valid() const noexcept {
-        static const char tmp[sizeof(pthread_mutex_t)] {};
-        return (shm_ != nullptr) && (ref_ != nullptr) && (mutex_ != nullptr)
-            && (std::memcmp(tmp, mutex_, sizeof(pthread_mutex_t)) != 0);
-    }
-
-    bool open(char const *name) noexcept {
-        close();
-        if ((mutex_ = acquire_mutex(name)) == nullptr) {
-            return false;
-        }
-        auto self_ref = ref_->fetch_add(1, std::memory_order_relaxed);
-        if (shm_->ref() > 1 || self_ref > 0) {
-            return valid();
-        }
-        ::pthread_mutex_destroy(mutex_);
-        auto finally = ipc::guard([this] { close(); }); // close when failed
-        // init mutex
-        int eno;
-        pthread_mutexattr_t mutex_attr;
-        if ((eno = ::pthread_mutexattr_init(&mutex_attr)) != 0) {
-            ipc::error("fail pthread_mutexattr_init[%d]\n", eno);
-            return false;
-        }
-        IPC_UNUSED_ auto guard_mutex_attr = guard([&mutex_attr] { ::pthread_mutexattr_destroy(&mutex_attr); });
-        if ((eno = ::pthread_mutexattr_setpshared(&mutex_attr, PTHREAD_PROCESS_SHARED)) != 0) {
-            ipc::error("fail pthread_mutexattr_setpshared[%d]\n", eno);
-            return false;
-        }
-        if ((eno = ::pthread_mutexattr_setrobust(&mutex_attr, PTHREAD_MUTEX_ROBUST)) != 0) {
-            ipc::error("fail pthread_mutexattr_setrobust[%d]\n", eno);
-            return false;
-        }
-        *mutex_ = PTHREAD_MUTEX_INITIALIZER;
-        if ((eno = ::pthread_mutex_init(mutex_, &mutex_attr)) != 0) {
-            ipc::error("fail pthread_mutex_init[%d]\n", eno);
-            return false;
-        }
-        finally.dismiss();
-        return valid();
-    }
-
-    void close() noexcept {
-        if ((ref_ != nullptr) && (shm_ != nullptr) && (mutex_ != nullptr)) {
-            if (shm_->name() != nullptr) {
-                release_mutex(shm_->name(), [this] {
-                    auto self_ref = ref_->fetch_sub(1, std::memory_order_relaxed);
-                    if ((shm_->ref() <= 1) && (self_ref <= 1)) {
-                        int eno;
-                        if ((eno = ::pthread_mutex_destroy(mutex_)) != 0) {
-                            ipc::error("fail pthread_mutex_destroy[%d]\n", eno);
-                        }
-                        return true;
-                    }
-                    return false;
-                });
-            } else shm_->release();
-        }
-        shm_   = nullptr;
-        ref_   = nullptr;
-        mutex_ = nullptr;
-    }
-
-    bool lock(std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        for (;;) {
-            auto ts = detail::make_timespec(tm);
-            int eno = (tm == invalid_value) 
-                ? ::pthread_mutex_lock(mutex_) 
-                : ::pthread_mutex_timedlock(mutex_, &ts);
-            switch (eno) {
-            case 0:
-                return true;
-            case ETIMEDOUT:
-                return false;
-            case EOWNERDEAD: {
-                    if (shm_->ref() > 1) {
-                        shm_->sub_ref();
-                    }
-                    int eno2 = ::pthread_mutex_consistent(mutex_);
-                    if (eno2 != 0) {
-                        ipc::error("fail pthread_mutex_lock[%d], pthread_mutex_consistent[%d]\n", eno, eno2);
-                        return false;
-                    }
-                    int eno3 = ::pthread_mutex_unlock(mutex_);
-                    if (eno3 != 0) {
-                        ipc::error("fail pthread_mutex_lock[%d], pthread_mutex_unlock[%d]\n", eno, eno3);
-                        return false;
-                    }
-                }
-                break; // loop again
-            default:
-                ipc::error("fail pthread_mutex_lock[%d]\n", eno);
-                return false;
-            }
-        }
-    }
-
-    bool try_lock() noexcept(false) {
-        if (!valid()) return false;
-        auto ts = detail::make_timespec(0);
-        int eno = ::pthread_mutex_timedlock(mutex_, &ts);
-        switch (eno) {
-        case 0:
-            return true;
-        case ETIMEDOUT:
-            return false;
-        case EOWNERDEAD: {
-                if (shm_->ref() > 1) {
-                    shm_->sub_ref();
-                }
-                int eno2 = ::pthread_mutex_consistent(mutex_);
-                if (eno2 != 0) {
-                    ipc::error("fail pthread_mutex_timedlock[%d], pthread_mutex_consistent[%d]\n", eno, eno2);
-                    break;
-                }
-                int eno3 = ::pthread_mutex_unlock(mutex_);
-                if (eno3 != 0) {
-                    ipc::error("fail pthread_mutex_timedlock[%d], pthread_mutex_unlock[%d]\n", eno, eno3);
-                    break;
-                }
-            }
-            break;
-        default:
-            ipc::error("fail pthread_mutex_timedlock[%d]\n", eno);
-            break;
-        }
-        throw std::system_error{eno, std::system_category()};
-    }
-
-    bool unlock() noexcept {
-        if (!valid()) return false;
-        int eno;
-        if ((eno = ::pthread_mutex_unlock(mutex_)) != 0) {
-            ipc::error("fail pthread_mutex_unlock[%d]\n", eno);
-            return false;
-        }
-        return true;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/posix/semaphore_impl.h b/src/libipc/platform/posix/semaphore_impl.h
deleted file mode 100644
index 94a5350a..00000000
--- a/src/libipc/platform/posix/semaphore_impl.h
+++ /dev/null
@@ -1,100 +0,0 @@
-#pragma once
-
-#include <cstdint>
-
-#include <fcntl.h>      /* For O_* constants */
-#include <sys/stat.h>   /* For mode constants */
-#include <semaphore.h>
-#include <errno.h>
-
-#include "libipc/utility/log.h"
-#include "libipc/shm.h"
-
-#include "get_wait_time.h"
-#include "get_error.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class semaphore {
-    ipc::shm::handle shm_;
-    sem_t *h_ = SEM_FAILED;
-
-public:
-    semaphore() = default;
-    ~semaphore() noexcept = default;
-
-    sem_t *native() const noexcept {
-        return h_;
-    }
-
-    bool valid() const noexcept {
-        return h_ != SEM_FAILED;
-    }
-
-    bool open(char const *name, std::uint32_t count) noexcept {
-        close();
-        if (!shm_.acquire(name, 1)) {
-            ipc::error("[open_semaphore] fail shm.acquire: %s\n", name);
-            return false;
-        }
-        h_ = ::sem_open(name, O_CREAT, 0666, static_cast<unsigned>(count));
-        if (h_ == SEM_FAILED) {
-            ipc::error("fail sem_open[%s]: name = %s\n", curr_error(), name);
-            return false;
-        }
-        return true;
-    }
-
-    void close() noexcept {
-        if (!valid()) return;
-        if (::sem_close(h_) != 0) {
-            ipc::error("fail sem_close[%s]\n", curr_error());
-        }
-        h_ = SEM_FAILED;
-        if (shm_.name() != nullptr) {
-            std::string name = shm_.name();
-            if (shm_.release() <= 1) {
-                if (::sem_unlink(name.c_str()) != 0) {
-                    ipc::error("fail sem_unlink[%s]: name = %s\n", curr_error(), name.c_str());
-                }
-            }
-        }
-    }
-
-    bool wait(std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        if (tm == invalid_value) {
-            if (::sem_wait(h_) != 0) {
-                ipc::error("fail sem_wait[%s]\n", curr_error());
-                return false;
-            }
-        } else {
-            auto ts = detail::make_timespec(tm);
-            if (::sem_timedwait(h_, &ts) != 0) {
-                if (errno != ETIMEDOUT) {
-                    ipc::error("fail sem_timedwait[%s]: tm = %zd, tv_sec = %ld, tv_nsec = %ld\n",
-                                curr_error(), tm, ts.tv_sec, ts.tv_nsec);
-                }
-                return false;
-            }
-        }
-        return true;
-    }
-
-    bool post(std::uint32_t count) noexcept {
-        if (!valid()) return false;
-        for (std::uint32_t i = 0; i < count; ++i) {
-            if (::sem_post(h_) != 0) {
-                ipc::error("fail sem_post[%s]\n", curr_error());
-                return false;
-            }
-        }
-        return true;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/posix/shm_posix.cpp b/src/libipc/platform/posix/shm_posix.cpp
deleted file mode 100644
index 9bf09ca0..00000000
--- a/src/libipc/platform/posix/shm_posix.cpp
+++ /dev/null
@@ -1,197 +0,0 @@
-
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <fcntl.h>
-
-#include <atomic>
-#include <string>
-#include <utility>
-#include <cstring>
-
-#include "libipc/shm.h"
-#include "libipc/def.h"
-#include "libipc/pool_alloc.h"
-
-#include "libipc/utility/log.h"
-#include "libipc/memory/resource.h"
-
-#include "get_error.h"
-
-namespace {
-
-struct info_t {
-    std::atomic<std::int32_t> acc_;
-};
-
-struct id_info_t {
-    int         fd_   = -1;
-    void*       mem_  = nullptr;
-    std::size_t size_ = 0;
-    ipc::string name_;
-};
-
-constexpr std::size_t calc_size(std::size_t size) {
-    return ((((size - 1) / alignof(info_t)) + 1) * alignof(info_t)) + sizeof(info_t);
-}
-
-inline auto& acc_of(void* mem, std::size_t size) {
-    return reinterpret_cast<info_t*>(static_cast<ipc::byte_t*>(mem) + size - sizeof(info_t))->acc_;
-}
-
-} // internal-linkage
-
-namespace ipc {
-namespace shm {
-
-id_t acquire(char const * name, std::size_t size, unsigned mode) {
-    if (name == nullptr || name[0] == '\0') {
-        ipc::error("fail acquire: name is empty\n");
-        return nullptr;
-    }
-    ipc::string op_name = ipc::string{"__IPC_SHM__"} + name;
-    // Open the object for read-write access.
-    int flag = O_RDWR;
-    switch (mode) {
-    case open:
-        size = 0;
-        break;
-    // The check for the existence of the object, 
-    // and its creation if it does not exist, are performed atomically.
-    case create:
-        flag |= O_CREAT | O_EXCL;
-        break;
-    // Create the shared memory object if it does not exist.
-    default:
-        flag |= O_CREAT;
-        break;
-    }
-    int fd = ::shm_open(op_name.c_str(), flag, S_IRUSR | S_IWUSR |
-                                               S_IRGRP | S_IWGRP |
-                                               S_IROTH | S_IWOTH);
-    if (fd == -1) {
-        ipc::error("fail shm_open[%s]: name = %s\n", curr_error(), name);
-        return nullptr;
-    }
-    auto ii = mem::alloc<id_info_t>();
-    ii->fd_   = fd;
-    ii->size_ = size;
-    ii->name_ = std::move(op_name);
-    return ii;
-}
-
-std::int32_t get_ref(id_t id) {
-    if (id == nullptr) {
-        return 0;
-    }
-    auto ii = static_cast<id_info_t*>(id);
-    if (ii->mem_ == nullptr || ii->size_ == 0) {
-        return 0;
-    }
-    return acc_of(ii->mem_, ii->size_).load(std::memory_order_acquire);
-}
-
-void sub_ref(id_t id) {
-    if (id == nullptr) {
-        ipc::error("fail sub_ref: invalid id (null)\n");
-        return;
-    }
-    auto ii = static_cast<id_info_t*>(id);
-    if (ii->mem_ == nullptr || ii->size_ == 0) {
-        ipc::error("fail sub_ref: invalid id (mem = %p, size = %zd)\n", ii->mem_, ii->size_);
-        return;
-    }
-    acc_of(ii->mem_, ii->size_).fetch_sub(1, std::memory_order_acq_rel);
-}
-
-void * get_mem(id_t id, std::size_t * size) {
-    if (id == nullptr) {
-        ipc::error("fail get_mem: invalid id (null)\n");
-        return nullptr;
-    }
-    auto ii = static_cast<id_info_t*>(id);
-    if (ii->mem_ != nullptr) {
-        if (size != nullptr) *size = ii->size_;
-        return ii->mem_;
-    }
-    int fd = ii->fd_;
-    if (fd == -1) {
-        ipc::error("fail get_mem: invalid id (fd = -1)\n");
-        return nullptr;
-    }
-    if (ii->size_ == 0) {
-        struct stat st;
-        if (::fstat(fd, &st) != 0) {
-            ipc::error("fail fstat[%s]: name = %s, size = %zd\n", curr_error(), ii->name_.c_str(), ii->size_);
-            return nullptr;
-        }
-        ii->size_ = static_cast<std::size_t>(st.st_size);
-        if ((ii->size_ <= sizeof(info_t)) || (ii->size_ % sizeof(info_t))) {
-            ipc::error("fail get_mem: %s, invalid size = %zd\n", ii->name_.c_str(), ii->size_);
-            return nullptr;
-        }
-    } else {
-        ii->size_ = calc_size(ii->size_);
-        if (::ftruncate(fd, static_cast<off_t>(ii->size_)) != 0) {
-            ipc::error("fail ftruncate[%s]: name = %s, size = %zd\n", curr_error(), ii->name_.c_str(), ii->size_);
-            return nullptr;
-        }
-    }
-    void* mem = ::mmap(nullptr, ii->size_, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-    if (mem == MAP_FAILED) {
-        ipc::error("fail mmap[%s]: name = %s, size = %zd\n", curr_error(), ii->name_.c_str(), ii->size_);
-        return nullptr;
-    }
-    ::close(fd);
-    ii->fd_  = -1;
-    ii->mem_ = mem;
-    if (size != nullptr) *size = ii->size_;
-    acc_of(mem, ii->size_).fetch_add(1, std::memory_order_release);
-    return mem;
-}
-
-std::int32_t release(id_t id) {
-    if (id == nullptr) {
-        ipc::error("fail release: invalid id (null)\n");
-        return -1;
-    }
-    std::int32_t ret = -1;
-    auto ii = static_cast<id_info_t*>(id);
-    if (ii->mem_ == nullptr || ii->size_ == 0) {
-        ipc::error("fail release: invalid id (mem = %p, size = %zd)\n", ii->mem_, ii->size_);
-    }
-    else if ((ret = acc_of(ii->mem_, ii->size_).fetch_sub(1, std::memory_order_acq_rel)) <= 1) {
-        ::munmap(ii->mem_, ii->size_);
-        if (!ii->name_.empty()) {
-            ::shm_unlink(ii->name_.c_str());
-        }
-    }
-    else ::munmap(ii->mem_, ii->size_);
-    mem::free(ii);
-    return ret;
-}
-
-void remove(id_t id) {
-    if (id == nullptr) {
-        ipc::error("fail remove: invalid id (null)\n");
-        return;
-    }
-    auto ii = static_cast<id_info_t*>(id);
-    auto name = std::move(ii->name_);
-    release(id);
-    if (!name.empty()) {
-        ::shm_unlink(name.c_str());
-    }
-}
-
-void remove(char const * name) {
-    if (name == nullptr || name[0] == '\0') {
-        ipc::error("fail remove: name is empty\n");
-        return;
-    }
-    ::shm_unlink((ipc::string{"__IPC_SHM__"} + name).c_str());
-}
-
-} // namespace shm
-} // namespace ipc
diff --git a/src/libipc/platform/win/condition.h b/src/libipc/platform/win/condition.h
deleted file mode 100644
index e477bff0..00000000
--- a/src/libipc/platform/win/condition.h
+++ /dev/null
@@ -1,119 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include <string>
-#include <mutex>
-
-#include <Windows.h>
-
-#include "libipc/utility/log.h"
-#include "libipc/utility/scope_guard.h"
-#include "libipc/platform/detail.h"
-#include "libipc/mutex.h"
-#include "libipc/semaphore.h"
-#include "libipc/shm.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class condition {
-    ipc::sync::semaphore sem_;
-    ipc::sync::mutex lock_;
-    ipc::shm::handle shm_;
-
-    std::int32_t &counter() {
-        return *static_cast<std::int32_t *>(shm_.get());
-    }
-
-public:
-    condition() = default;
-    ~condition() noexcept = default;
-
-    auto native() noexcept {
-        return sem_.native();
-    }
-
-    auto native() const noexcept {
-        return sem_.native();
-    }
-
-    bool valid() const noexcept {
-        return sem_.valid() && lock_.valid() && shm_.valid();
-    }
-
-    bool open(char const *name) noexcept {
-        close();
-        if (!sem_.open((std::string{"_cond_sem_"} + name).c_str())) {
-            return false;
-        }
-        auto finally_sem = ipc::guard([this] { sem_.close(); }); // close when failed
-        if (!lock_.open((std::string{"_cond_lock_"} + name).c_str())) {
-            return false;
-        }
-        auto finally_lock = ipc::guard([this] { lock_.close(); }); // close when failed
-        if (!shm_.acquire((std::string{"_cond_shm_"} + name).c_str(), sizeof(std::int32_t))) {
-            return false;
-        }
-        finally_lock.dismiss();
-        finally_sem.dismiss();
-        return valid();
-    }
-
-    void close() noexcept {
-        if (!valid()) return;
-        sem_.close();
-        lock_.close();
-        shm_.release();
-    }
-
-    bool wait(ipc::sync::mutex &mtx, std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        auto &cnt = counter();
-        {
-            IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard {lock_};
-            cnt = (cnt < 0) ? 1 : cnt + 1;
-        }
-        DWORD ms = (tm == invalid_value) ? INFINITE : static_cast<DWORD>(tm);
-        /**
-         * @see
-         *  - https://www.microsoft.com/en-us/research/wp-content/uploads/2004/12/ImplementingCVs.pdf
-         *  - https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-signalobjectandwait
-        */
-        bool rs = ::SignalObjectAndWait(mtx.native(), sem_.native(), ms, FALSE) == WAIT_OBJECT_0;
-        bool rl = mtx.lock(); // INFINITE
-        if (!rs) {
-            IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard {lock_};
-            cnt -= 1;
-        }
-        return rs && rl;
-    }
-
-    bool notify(ipc::sync::mutex &) noexcept {
-        if (!valid()) return false;
-        auto &cnt = counter();
-        if (!lock_.lock()) return false;
-        bool ret = false;
-        if (cnt > 0) {
-            ret = sem_.post(1);
-            cnt -= 1;
-        }
-        return lock_.unlock() && ret;
-    }
-
-    bool broadcast(ipc::sync::mutex &) noexcept {
-        if (!valid()) return false;
-        auto &cnt = counter();
-        if (!lock_.lock()) return false;
-        bool ret = false;
-        if (cnt > 0) {
-            ret = sem_.post(cnt);
-            cnt = 0;
-        }
-        return lock_.unlock() && ret;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/win/get_sa.h b/src/libipc/platform/win/get_sa.h
deleted file mode 100644
index 74b68d4f..00000000
--- a/src/libipc/platform/win/get_sa.h
+++ /dev/null
@@ -1,35 +0,0 @@
-#pragma once
-
-#include <securitybaseapi.h>
-
-namespace ipc {
-namespace detail {
-
-inline LPSECURITY_ATTRIBUTES get_sa() {
-    static struct initiator {
-
-        SECURITY_DESCRIPTOR sd_;
-        SECURITY_ATTRIBUTES sa_;
-
-        bool succ_ = false;
-
-        initiator() {
-            if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
-                ipc::error("fail InitializeSecurityDescriptor[%d]\n", static_cast<int>(::GetLastError()));
-                return;
-            }
-            if (!::SetSecurityDescriptorDacl(&sd_, TRUE, NULL, FALSE)) {
-                ipc::error("fail SetSecurityDescriptorDacl[%d]\n", static_cast<int>(::GetLastError()));
-                return;
-            }
-            sa_.nLength = sizeof(SECURITY_ATTRIBUTES);
-            sa_.bInheritHandle = FALSE;
-            sa_.lpSecurityDescriptor = &sd_;
-            succ_ = true;
-        }
-    } handle;
-    return handle.succ_ ? &handle.sa_ : nullptr;
-}
-
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/win/mutex.h b/src/libipc/platform/win/mutex.h
deleted file mode 100644
index 68968c48..00000000
--- a/src/libipc/platform/win/mutex.h
+++ /dev/null
@@ -1,96 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include <system_error>
-
-#include <Windows.h>
-
-#include "libipc/utility/log.h"
-
-#include "to_tchar.h"
-#include "get_sa.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class mutex {
-    HANDLE h_ = NULL;
-
-public:
-    mutex() noexcept = default;
-    ~mutex() noexcept = default;
-
-    HANDLE native() const noexcept {
-        return h_;
-    }
-
-    bool valid() const noexcept {
-        return h_ != NULL;
-    }
-
-    bool open(char const *name) noexcept {
-        close();
-        h_ = ::CreateMutex(detail::get_sa(), FALSE, ipc::detail::to_tchar(name).c_str());
-        if (h_ == NULL) {
-            ipc::error("fail CreateMutex[%lu]: %s\n", ::GetLastError(), name);
-            return false;
-        }
-        return true;
-    }
-
-    void close() noexcept {
-        if (!valid()) return;
-        ::CloseHandle(h_);
-        h_ = NULL;
-    }
-
-    bool lock(std::uint64_t tm) noexcept {
-        DWORD ret, ms = (tm == invalid_value) ? INFINITE : static_cast<DWORD>(tm);
-        for(;;) {
-            switch ((ret = ::WaitForSingleObject(h_, ms))) {
-            case WAIT_OBJECT_0:
-                return true;
-            case WAIT_TIMEOUT:
-                return false;
-            case WAIT_ABANDONED:
-                ipc::log("fail WaitForSingleObject[%lu]: WAIT_ABANDONED, try again.\n", ::GetLastError());
-                if (!unlock()) {
-                    return false;
-                }
-                break; // loop again
-            default:
-                ipc::error("fail WaitForSingleObject[%lu]: 0x%08X\n", ::GetLastError(), ret);
-                return false;
-            }
-        }
-    }
-
-    bool try_lock() noexcept(false) {
-        DWORD ret = ::WaitForSingleObject(h_, 0);
-        switch (ret) {
-        case WAIT_OBJECT_0:
-            return true;
-        case WAIT_TIMEOUT:
-            return false;
-        case WAIT_ABANDONED:
-            unlock();
-            IPC_FALLTHROUGH_;
-        default:
-            ipc::error("fail WaitForSingleObject[%lu]: 0x%08X\n", ::GetLastError(), ret);
-            throw std::system_error{static_cast<int>(ret), std::system_category()};
-        }
-    }
-
-    bool unlock() noexcept {
-        if (!::ReleaseMutex(h_)) {
-            ipc::error("fail ReleaseMutex[%lu]\n", ::GetLastError());
-            return false;
-        }
-        return true;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/win/semaphore.h b/src/libipc/platform/win/semaphore.h
deleted file mode 100644
index 47fd45d1..00000000
--- a/src/libipc/platform/win/semaphore.h
+++ /dev/null
@@ -1,74 +0,0 @@
-#pragma once
-
-#include <cstdint>
-
-#include <Windows.h>
-
-#include "libipc/utility/log.h"
-
-#include "to_tchar.h"
-#include "get_sa.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class semaphore {
-    HANDLE h_ = NULL;
-
-public:
-    semaphore() noexcept = default;
-    ~semaphore() noexcept = default;
-
-    HANDLE native() const noexcept {
-        return h_;
-    }
-
-    bool valid() const noexcept {
-        return h_ != NULL;
-    }
-
-    bool open(char const *name, std::uint32_t count) noexcept {
-        close();
-        h_ = ::CreateSemaphore(detail::get_sa(), 
-                               static_cast<LONG>(count), LONG_MAX, 
-                               ipc::detail::to_tchar(name).c_str());
-        if (h_ == NULL) {
-            ipc::error("fail CreateSemaphore[%lu]: %s\n", ::GetLastError(), name);
-            return false;
-        }
-        return true;
-    }
-
-    void close() noexcept {
-        if (!valid()) return;
-        ::CloseHandle(h_);
-        h_ = NULL;
-    }
-
-    bool wait(std::uint64_t tm) noexcept {
-        DWORD ret, ms = (tm == invalid_value) ? INFINITE : static_cast<DWORD>(tm);
-        switch ((ret = ::WaitForSingleObject(h_, ms))) {
-        case WAIT_OBJECT_0:
-            return true;
-        case WAIT_TIMEOUT:
-            return false;
-        case WAIT_ABANDONED:
-        default:
-            ipc::error("fail WaitForSingleObject[%lu]: 0x%08X\n", ::GetLastError(), ret);
-            return false;
-        }
-    }
-
-    bool post(std::uint32_t count) noexcept {
-        if (!::ReleaseSemaphore(h_, static_cast<LONG>(count), NULL)) {
-            ipc::error("fail ReleaseSemaphore[%lu]\n", ::GetLastError());
-            return false;
-        }
-        return true;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/win/shm_win.cpp b/src/libipc/platform/win/shm_win.cpp
deleted file mode 100755
index 366e8bd1..00000000
--- a/src/libipc/platform/win/shm_win.cpp
+++ /dev/null
@@ -1,135 +0,0 @@
-
-#include <Windows.h>
-
-#include <string>
-#include <utility>
-
-#include "libipc/shm.h"
-#include "libipc/def.h"
-#include "libipc/pool_alloc.h"
-
-#include "libipc/utility/log.h"
-#include "libipc/memory/resource.h"
-
-#include "to_tchar.h"
-#include "get_sa.h"
-
-namespace {
-
-struct id_info_t {
-    HANDLE      h_    = NULL;
-    void*       mem_  = nullptr;
-    std::size_t size_ = 0;
-};
-
-} // internal-linkage
-
-namespace ipc {
-namespace shm {
-
-id_t acquire(char const * name, std::size_t size, unsigned mode) {
-    if (name == nullptr || name[0] == '\0') {
-        ipc::error("fail acquire: name is empty\n");
-        return nullptr;
-    }
-    HANDLE h;
-    auto fmt_name = ipc::detail::to_tchar(ipc::string{"__IPC_SHM__"} + name);
-    // Opens a named file mapping object.
-    if (mode == open) {
-        h = ::OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, fmt_name.c_str());
-    }
-    // Creates or opens a named file mapping object for a specified file.
-    else {
-        h = ::CreateFileMapping(INVALID_HANDLE_VALUE, detail::get_sa(), PAGE_READWRITE | SEC_COMMIT,
-                                0, static_cast<DWORD>(size), fmt_name.c_str());
-        // If the object exists before the function call, the function returns a handle to the existing object 
-        // (with its current size, not the specified size), and GetLastError returns ERROR_ALREADY_EXISTS.
-        if ((mode == create) && (::GetLastError() == ERROR_ALREADY_EXISTS)) {
-            ::CloseHandle(h);
-            h = NULL;
-        }
-    }
-    if (h == NULL) {
-        ipc::error("fail CreateFileMapping/OpenFileMapping[%d]: %s\n", static_cast<int>(::GetLastError()), name);
-        return nullptr;
-    }
-    auto ii = mem::alloc<id_info_t>();
-    ii->h_    = h;
-    ii->size_ = size;
-    return ii;
-}
-
-std::int32_t get_ref(id_t) {
-    return 0;
-}
-
-void sub_ref(id_t) {
-    // Do Nothing.
-}
-
-void * get_mem(id_t id, std::size_t * size) {
-    if (id == nullptr) {
-        ipc::error("fail get_mem: invalid id (null)\n");
-        return nullptr;
-    }
-    auto ii = static_cast<id_info_t*>(id);
-    if (ii->mem_ != nullptr) {
-        if (size != nullptr) *size = ii->size_;
-        return ii->mem_;
-    }
-    if (ii->h_ == NULL) {
-        ipc::error("fail to_mem: invalid id (h = null)\n");
-        return nullptr;
-    }
-    LPVOID mem = ::MapViewOfFile(ii->h_, FILE_MAP_ALL_ACCESS, 0, 0, 0);
-    if (mem == NULL) {
-        ipc::error("fail MapViewOfFile[%d]\n", static_cast<int>(::GetLastError()));
-        return nullptr;
-    }
-    MEMORY_BASIC_INFORMATION mem_info;
-    if (::VirtualQuery(mem, &mem_info, sizeof(mem_info)) == 0) {
-        ipc::error("fail VirtualQuery[%d]\n", static_cast<int>(::GetLastError()));
-        return nullptr;
-    }
-    ii->mem_  = mem;
-    ii->size_ = static_cast<std::size_t>(mem_info.RegionSize);
-    if (size != nullptr) *size = ii->size_;
-    return static_cast<void *>(mem);
-}
-
-std::int32_t release(id_t id) {
-    if (id == nullptr) {
-        ipc::error("fail release: invalid id (null)\n");
-        return -1;
-    }
-    auto ii = static_cast<id_info_t*>(id);
-    if (ii->mem_ == nullptr || ii->size_ == 0) {
-        ipc::error("fail release: invalid id (mem = %p, size = %zd)\n", ii->mem_, ii->size_);
-    }
-    else ::UnmapViewOfFile(static_cast<LPCVOID>(ii->mem_));
-    if (ii->h_ == NULL) {
-        ipc::error("fail release: invalid id (h = null)\n");
-    }
-    else ::CloseHandle(ii->h_);
-    mem::free(ii);
-    return 0;
-}
-
-void remove(id_t id) {
-    if (id == nullptr) {
-        ipc::error("fail release: invalid id (null)\n");
-        return;
-    }
-    release(id);
-}
-
-void remove(char const * name) {
-    if (name == nullptr || name[0] == '\0') {
-        ipc::error("fail remove: name is empty\n");
-        return;
-    }
-    // Do Nothing.
-}
-
-} // namespace shm
-} // namespace ipc
diff --git a/src/libipc/platform/win/to_tchar.h b/src/libipc/platform/win/to_tchar.h
deleted file mode 100755
index 892177e2..00000000
--- a/src/libipc/platform/win/to_tchar.h
+++ /dev/null
@@ -1,74 +0,0 @@
-#pragma once
-
-#include <Windows.h>
-
-#include <type_traits>
-#include <string>
-#include <locale>
-#include <codecvt>
-#include <cstring>
-#include <stdexcept>
-#include <cstddef>
-
-#include "libipc/utility/concept.h"
-#include "libipc/memory/resource.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace detail {
-
-struct has_value_type_ {
-    template <typename T> static std::true_type  check(typename T::value_type *);
-    template <typename T> static std::false_type check(...);
-};
-
-template <typename T, typename U, typename = decltype(has_value_type_::check<U>(nullptr))>
-struct is_same_char : std::is_same<T, U> {};
-
-template <typename T, typename U>
-struct is_same_char<T, U, std::true_type> : std::is_same<T, typename U::value_type> {};
-
-template <typename T, typename S, typename R = S>
-using IsSameChar = ipc::require<is_same_char<T, S>::value, R>;
-
-////////////////////////////////////////////////////////////////
-/// to_tchar implementation
-////////////////////////////////////////////////////////////////
-
-template <typename T = TCHAR>
-constexpr auto to_tchar(ipc::string &&str) -> IsSameChar<T, ipc::string, ipc::string &&> {
-    return std::move(str); // noconv
-}
-
-/**
- * @remarks codecvt_utf8_utf16/std::wstring_convert is deprecated
- * @see https://codingtidbit.com/2020/02/09/c17-codecvt_utf8-is-deprecated/
- *      https://stackoverflow.com/questions/42946335/deprecated-header-codecvt-replacement
- *      https://en.cppreference.com/w/cpp/locale/codecvt/in
- *      https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-multibytetowidechar
-*/
-template <typename T = TCHAR>
-auto to_tchar(ipc::string &&external) -> IsSameChar<T, ipc::wstring> {
-    if (external.empty()) {
-        return {}; // noconv
-    }
-    /**
-     * CP_ACP       : The system default Windows ANSI code page.
-     * CP_MACCP     : The current system Macintosh code page.
-     * CP_OEMCP     : The current system OEM code page.
-     * CP_SYMBOL    : Symbol code page (42).
-     * CP_THREAD_ACP: The Windows ANSI code page for the current thread.
-     * CP_UTF7      : UTF-7. Use this value only when forced by a 7-bit transport mechanism. Use of UTF-8 is preferred.
-     * CP_UTF8      : UTF-8.
-    */
-    int size_needed = ::MultiByteToWideChar(CP_UTF8, 0, &external[0], (int)external.size(), NULL, 0);
-    if (size_needed <= 0) {
-        return {};
-    }
-    ipc::wstring internal(size_needed, L'\0');
-    ::MultiByteToWideChar(CP_UTF8, 0, &external[0], (int)external.size(), &internal[0], size_needed);
-    return internal;
-}
-
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/policy.h b/src/libipc/policy.h
deleted file mode 100755
index 89596079..00000000
--- a/src/libipc/policy.h
+++ /dev/null
@@ -1,25 +0,0 @@
-#pragma once
-
-#include <type_traits>
-
-#include "libipc/def.h"
-#include "libipc/prod_cons.h"
-
-#include "libipc/circ/elem_array.h"
-
-namespace ipc {
-namespace policy {
-
-template <template <typename, std::size_t...> class Elems, typename Flag>
-struct choose;
-
-template <typename Flag>
-struct choose<circ::elem_array, Flag> {
-    using flag_t = Flag;
-
-    template <std::size_t DataSize, std::size_t AlignSize>
-    using elems_t = circ::elem_array<ipc::prod_cons_impl<flag_t>, DataSize, AlignSize>;
-};
-
-} // namespace policy
-} // namespace ipc
diff --git a/src/libipc/pool_alloc.cpp b/src/libipc/pool_alloc.cpp
deleted file mode 100755
index d19a13c7..00000000
--- a/src/libipc/pool_alloc.cpp
+++ /dev/null
@@ -1,17 +0,0 @@
-#include "libipc/pool_alloc.h"
-
-#include "libipc/memory/resource.h"
-
-namespace ipc {
-namespace mem {
-
-void* pool_alloc::alloc(std::size_t size) {
-    return async_pool_alloc::alloc(size);
-}
-
-void pool_alloc::free(void* p, std::size_t size) {
-    async_pool_alloc::free(p, size);
-}
-
-} // namespace mem
-} // namespace ipc
diff --git a/src/libipc/prod_cons.h b/src/libipc/prod_cons.h
deleted file mode 100755
index 1763209e..00000000
--- a/src/libipc/prod_cons.h
+++ /dev/null
@@ -1,315 +0,0 @@
-#pragma once
-
-#include <atomic>
-#include <utility>
-#include <cstring>
-#include <type_traits>
-#include <cstdint>
-
-#include "libipc/def.h"
-
-#include "libipc/platform/detail.h"
-#include "libipc/circ/elem_def.h"
-#include "libipc/utility/log.h"
-#include "libipc/utility/utility.h"
-
-namespace ipc {
-
-////////////////////////////////////////////////////////////////
-/// producer-consumer implementation
-////////////////////////////////////////////////////////////////
-
-template <typename Flag>
-struct prod_cons_impl;
-
-template <>
-struct prod_cons_impl<wr<relat::single, relat::single, trans::unicast>> {
-
-    template <std::size_t DataSize, std::size_t AlignSize>
-    struct elem_t {
-        std::aligned_storage_t<DataSize, AlignSize> data_ {};
-    };
-
-    alignas(cache_line_size) std::atomic<circ::u2_t> rd_; // read index
-    alignas(cache_line_size) std::atomic<circ::u2_t> wt_; // write index
-
-    constexpr circ::u2_t cursor() const noexcept {
-        return 0;
-    }
-
-    template <typename F, typename E>
-    bool push(F&& f, E* elems) {
-        auto cur_wt = circ::index_of(wt_.load(std::memory_order_relaxed));
-        if (cur_wt == circ::index_of(rd_.load(std::memory_order_acquire) - 1)) {
-            return false; // full
-        }
-        std::forward<F>(f)(&(elems[cur_wt].data_));
-        wt_.fetch_add(1, std::memory_order_release);
-        return true;
-    }
-
-    template <typename F, typename E>
-    bool pop(circ::u2_t& /*cur*/, F&& f, E* elems) {
-        auto cur_rd = circ::index_of(rd_.load(std::memory_order_relaxed));
-        if (cur_rd == circ::index_of(wt_.load(std::memory_order_acquire))) {
-            return false; // empty
-        }
-        std::forward<F>(f)(&(elems[cur_rd].data_));
-        rd_.fetch_add(1, std::memory_order_release);
-        return true;
-    }
-};
-
-template <>
-struct prod_cons_impl<wr<relat::single, relat::multi , trans::unicast>>
-     : prod_cons_impl<wr<relat::single, relat::single, trans::unicast>> {
-
-    template <typename F, 
-              template <std::size_t, std::size_t> class E, std::size_t DS, std::size_t AS>
-    bool pop(circ::u2_t& /*cur*/, F&& f, E<DS, AS>* elems) {
-        for (unsigned k = 0;;) {
-            auto cur_rd = rd_.load(std::memory_order_relaxed);
-            if (circ::index_of(cur_rd) ==
-                circ::index_of(wt_.load(std::memory_order_acquire))) {
-                return false; // empty
-            }
-            if (rd_.compare_exchange_weak(cur_rd, cur_rd + 1, std::memory_order_release)) {
-                std::forward<F>(f)(&(elems[circ::index_of(cur_rd)].data_));
-                return true;
-            }
-            ipc::yield(k);
-        }
-    }
-};
-
-template <>
-struct prod_cons_impl<wr<relat::multi , relat::multi, trans::unicast>>
-     : prod_cons_impl<wr<relat::single, relat::multi, trans::unicast>> {
-
-    using flag_t = std::uint64_t;
-
-    template <std::size_t DataSize, std::size_t AlignSize>
-    struct elem_t {
-        std::aligned_storage_t<DataSize, AlignSize> data_ {};
-        std::atomic<flag_t> f_ct_ { 0 }; // commit flag
-    };
-
-    alignas(cache_line_size) std::atomic<circ::u2_t> ct_; // commit index
-
-    template <typename F, typename E>
-    bool push(F&& f, E* elems) {
-        circ::u2_t cur_ct, nxt_ct;
-        for (unsigned k = 0;;) {
-            cur_ct = ct_.load(std::memory_order_relaxed);
-            if (circ::index_of(nxt_ct = cur_ct + 1) ==
-                circ::index_of(rd_.load(std::memory_order_acquire))) {
-                return false; // full
-            }
-            if (ct_.compare_exchange_weak(cur_ct, nxt_ct, std::memory_order_acq_rel)) {
-                break;
-            }
-            ipc::yield(k);
-        }
-        auto* el = elems + circ::index_of(cur_ct);
-        std::forward<F>(f)(&(el->data_));
-        // set flag & try update wt
-        el->f_ct_.store(~static_cast<flag_t>(cur_ct), std::memory_order_release);
-        while (1) {
-            auto cac_ct = el->f_ct_.load(std::memory_order_acquire);
-            if (cur_ct != wt_.load(std::memory_order_relaxed)) {
-                return true;
-            }
-            if ((~cac_ct) != cur_ct) {
-                return true;
-            }
-            if (!el->f_ct_.compare_exchange_strong(cac_ct, 0, std::memory_order_relaxed)) {
-                return true;
-            }
-            wt_.store(nxt_ct, std::memory_order_release);
-            cur_ct = nxt_ct;
-            nxt_ct = cur_ct + 1;
-            el = elems + circ::index_of(cur_ct);
-        }
-        return true;
-    }
-
-    template <typename F, 
-              template <std::size_t, std::size_t> class E, std::size_t DS, std::size_t AS>
-    bool pop(circ::u2_t& /*cur*/, F&& f, E<DS, AS>* elems) {
-        for (unsigned k = 0;;) {
-            auto cur_rd = rd_.load(std::memory_order_relaxed);
-            auto cur_wt = wt_.load(std::memory_order_acquire);
-            auto id_rd  = circ::index_of(cur_rd);
-            auto id_wt  = circ::index_of(cur_wt);
-            if (id_rd == id_wt) {
-                auto* el = elems + id_wt;
-                auto cac_ct = el->f_ct_.load(std::memory_order_acquire);
-                if ((~cac_ct) != cur_wt) {
-                    return false; // empty
-                }
-                if (el->f_ct_.compare_exchange_weak(cac_ct, 0, std::memory_order_relaxed)) {
-                    wt_.store(cur_wt + 1, std::memory_order_release);
-                }
-                k = 0;
-            }
-            else if (rd_.compare_exchange_weak(cur_rd, cur_rd + 1, std::memory_order_release)) {
-                std::forward<F>(f)(&(elems[id_rd].data_));
-                return true;
-            }
-            ipc::yield(k);
-        }
-    }
-};
-
-template <>
-struct prod_cons_impl<wr<relat::single, relat::multi, trans::broadcast>> {
-
-    using flag_t = std::uint64_t;
-
-    template <std::size_t DataSize, std::size_t AlignSize>
-    struct elem_t {
-        std::aligned_storage_t<DataSize, AlignSize> data_ {};
-        std::atomic<flag_t> f_rc_ { 0 }; // read-flag
-    };
-
-    alignas(cache_line_size) std::atomic<circ::u2_t> wt_;   // write index
-
-    circ::u2_t cursor() const noexcept {
-        return wt_.load(std::memory_order_acquire);
-    }
-
-    template <typename F, typename E>
-    bool push(F&& f, E* elems) {
-        E* el = elems + circ::index_of(wt_.load(std::memory_order_relaxed));
-        auto cur_rc = el->f_rc_.exchange(~0ull, std::memory_order_acq_rel);
-        // check for consumers to read this element
-        if (cur_rc != 0) {
-            return false; // full
-        }
-        std::forward<F>(f)(&(el->data_));
-        wt_.fetch_add(1, std::memory_order_release);
-        return true;
-    }
-
-    template <typename F, typename E>
-    bool pop(circ::u2_t& cur, F&& f, E* elems) {
-        if (cur == cursor()) return false; // empty
-        E* el = elems + circ::index_of(cur++);
-        std::forward<F>(f)(&(el->data_));
-        el->f_rc_.store(0, std::memory_order_release);
-        return true;
-    }
-};
-
-template <>
-struct prod_cons_impl<wr<relat::multi, relat::multi, trans::broadcast>> {
-
-    using flag_t = std::uint64_t;
-
-    enum : flag_t {
-        pushing = 1ull,
-        pushed  = ~0ull,
-        popped  = 0ull,
-    };
-
-    template <std::size_t DataSize, std::size_t AlignSize>
-    struct elem_t {
-        std::aligned_storage_t<DataSize, AlignSize> data_ {};
-        std::atomic<flag_t> f_rc_ { 0 }; // read-flag
-        std::atomic<flag_t> f_ct_ { 0 }; // commit-flag
-    };
-
-    alignas(cache_line_size) std::atomic<circ::u2_t> ct_;   // commit index
-    alignas(cache_line_size) std::atomic<circ::u2_t> wt_;   // write index
-
-    circ::u2_t cursor() const noexcept {
-        return wt_.load(std::memory_order_acquire);
-    }
-
-    template <typename F, typename E>
-    bool push(F&& f, E* elems) {
-        E* el;
-        circ::u2_t cur_ct, nxt_ct;
-        for (unsigned k = 0;;) {
-            auto cac_ct = ct_.load(std::memory_order_relaxed);
-            cur_ct = cac_ct;
-            nxt_ct = cur_ct + 1;
-            el = elems + circ::index_of(cac_ct);
-            for (unsigned k = 0;;) {
-                auto cur_rc = el->f_rc_.load(std::memory_order_acquire);
-                switch (cur_rc) {
-                // helper
-                case pushing:
-                    ct_.compare_exchange_strong(cac_ct, nxt_ct, std::memory_order_release);
-                    goto try_next;
-                // full
-                case pushed:
-                    return false;
-                // writable
-                default:
-                    break;
-                }
-                if (el->f_rc_.compare_exchange_weak(cur_rc, pushing, std::memory_order_release)) {
-                    break;
-                }
-                ipc::yield(k);
-            }
-            ct_.compare_exchange_strong(cac_ct, nxt_ct, std::memory_order_relaxed);
-            el->f_rc_.store(pushed, std::memory_order_relaxed);
-            std::atomic_thread_fence(std::memory_order_release);
-            break;
-        try_next:
-            ipc::yield(k);
-        }
-        std::forward<F>(f)(&(el->data_));
-        // set flag & try update wt
-        el->f_ct_.store(~static_cast<flag_t>(cur_ct), std::memory_order_release);
-        while (1) {
-            auto cac_ct = el->f_ct_.load(std::memory_order_acquire);
-            if (cur_ct != wt_.load(std::memory_order_relaxed)) {
-                return true;
-            }
-            if ((~cac_ct) != cur_ct) {
-                return true;
-            }
-            if (!el->f_ct_.compare_exchange_strong(cac_ct, 0, std::memory_order_relaxed)) {
-                return true;
-            }
-            wt_.store(nxt_ct, std::memory_order_release);
-            cur_ct = nxt_ct;
-            nxt_ct = cur_ct + 1;
-            el = elems + circ::index_of(cur_ct);
-        }
-        return true;
-    }
-
-    template <typename F, typename E, std::size_t N>
-    bool pop(circ::u2_t& cur, F&& f, E(& elems)[N]) {
-        for (unsigned k = 0;;) {
-            auto cur_wt = wt_.load(std::memory_order_acquire);
-            auto id_rd  = circ::index_of(cur);
-            auto id_wt  = circ::index_of(cur_wt);
-            if (id_rd == id_wt) {
-                auto* el = elems + id_wt;
-                auto cac_ct = el->f_ct_.load(std::memory_order_acquire);
-                if ((~cac_ct) != cur_wt) {
-                    return false; // empty
-                }
-                if (el->f_ct_.compare_exchange_weak(cac_ct, 0, std::memory_order_relaxed)) {
-                    wt_.store(cur_wt + 1, std::memory_order_release);
-                }
-                k = 0;
-            }
-            else {
-                ++cur;
-                auto* el = elems + id_rd;
-                std::forward<F>(f)(&(el->data_));
-                el->f_rc_.store(popped, std::memory_order_release);
-                return true;
-            }
-            ipc::yield(k);
-        }
-    }
-};
-
-} // namespace ipc
diff --git a/src/libipc/queue.h b/src/libipc/queue.h
deleted file mode 100755
index 5fe77a2e..00000000
--- a/src/libipc/queue.h
+++ /dev/null
@@ -1,198 +0,0 @@
-#pragma once
-
-#include <type_traits>
-#include <new>
-#include <utility>  // [[since C++14]]: std::exchange
-#include <algorithm>
-#include <atomic>
-#include <tuple>
-#include <thread>
-#include <chrono>
-#include <string>
-#include <cassert>  // assert
-
-#include "libipc/def.h"
-#include "libipc/shm.h"
-#include "libipc/rw_lock.h"
-
-#include "libipc/utility/log.h"
-#include "libipc/platform/detail.h"
-#include "libipc/circ/elem_def.h"
-
-namespace ipc {
-namespace detail {
-
-class queue_conn {
-protected:
-    circ::cc_t connected_ = 0;
-    shm::handle elems_h_;
-
-    template <typename Elems>
-    Elems* open(char const * name) {
-        if (name == nullptr || name[0] == '\0') {
-            ipc::error("fail open waiter: name is empty!\n");
-            return nullptr;
-        }
-        if (!elems_h_.acquire(name, sizeof(Elems))) {
-            return nullptr;
-        }
-        auto elems = static_cast<Elems*>(elems_h_.get());
-        if (elems == nullptr) {
-            ipc::error("fail acquire elems: %s\n", name);
-            return nullptr;
-        }
-        elems->init();
-        return elems;
-    }
-
-    void close() {
-        elems_h_.release();
-    }
-
-public:
-    queue_conn() = default;
-    queue_conn(const queue_conn&) = delete;
-    queue_conn& operator=(const queue_conn&) = delete;
-
-    bool connected() const noexcept {
-        return connected_ != 0;
-    }
-
-    circ::cc_t connected_id() const noexcept {
-        return connected_;
-    }
-
-    template <typename Elems>
-    auto connect(Elems* elems) noexcept
-                         /*needs 'optional' here*/
-     -> std::tuple<bool, bool, decltype(std::declval<Elems>().cursor())> {
-        if (elems == nullptr) return {};
-        // if it's already connected, just return
-        if (connected()) return {connected(), false, 0};
-        connected_ = elems->connect_receiver();
-        return {connected(), true, elems->cursor()};
-    }
-
-    template <typename Elems>
-    bool disconnect(Elems* elems) noexcept {
-        if (elems == nullptr) return false;
-        // if it's already disconnected, just return false
-        if (!connected()) return false;
-        elems->disconnect_receiver(std::exchange(connected_, 0));
-        return true;
-    }
-};
-
-template <typename Elems>
-class queue_base : public queue_conn {
-    using base_t = queue_conn;
-
-public:
-    using elems_t  = Elems;
-    using policy_t = typename elems_t::policy_t;
-
-protected:
-    elems_t * elems_ = nullptr;
-    decltype(std::declval<elems_t>().cursor()) cursor_ = 0;
-    bool sender_flag_ = false;
-
-public:
-    using base_t::base_t;
-
-    queue_base() = default;
-
-    explicit queue_base(char const * name)
-        : queue_base{} {
-        elems_ = open<elems_t>(name);
-    }
-
-    explicit queue_base(elems_t * elems) noexcept
-        : queue_base{} {
-        assert(elems != nullptr);
-        elems_ = elems;
-    }
-
-    /* not virtual */ ~queue_base() {
-        base_t::close();
-    }
-
-    elems_t       * elems()       noexcept { return elems_; }
-    elems_t const * elems() const noexcept { return elems_; }
-
-    bool ready_sending() noexcept {
-        if (elems_ == nullptr) return false;
-        return sender_flag_ || (sender_flag_ = elems_->connect_sender());
-    }
-
-    void shut_sending() noexcept {
-        if (elems_ == nullptr) return;
-        if (!sender_flag_) return;
-        elems_->disconnect_sender();
-    }
-
-    bool connect() noexcept {
-        auto tp = base_t::connect(elems_);
-        if (std::get<0>(tp) && std::get<1>(tp)) {
-            cursor_ = std::get<2>(tp);
-            return true;
-        }
-        return std::get<0>(tp);
-    }
-
-    bool disconnect() noexcept {
-        return base_t::disconnect(elems_);
-    }
-
-    std::size_t conn_count() const noexcept {
-        return (elems_ == nullptr) ? static_cast<std::size_t>(invalid_value) : elems_->conn_count();
-    }
-
-    bool valid() const noexcept {
-        return elems_ != nullptr;
-    }
-
-    bool empty() const noexcept {
-        return !valid() || (cursor_ == elems_->cursor());
-    }
-
-    template <typename T, typename F, typename... P>
-    bool push(F&& prep, P&&... params) {
-        if (elems_ == nullptr) return false;
-        return elems_->push([&](void* p) {
-            if (prep(p)) ::new (p) T(std::forward<P>(params)...);
-        });
-    }
-
-    template <typename T>
-    bool pop(T& item) {
-        if (elems_ == nullptr) {
-            return false;
-        }
-        return elems_->pop(&(this->cursor_), [&item](void* p) {
-            ::new (&item) T(std::move(*static_cast<T*>(p)));
-        });
-    }
-};
-
-} // namespace detail
-
-template <typename T, typename Policy>
-class queue final : public detail::queue_base<typename Policy::template elems_t<sizeof(T), alignof(T)>> {
-    using base_t = detail::queue_base<typename Policy::template elems_t<sizeof(T), alignof(T)>>;
-
-public:
-    using value_t = T;
-
-    using base_t::base_t;
-
-    template <typename... P>
-    bool push(P&&... params) {
-        return base_t::template push<T>(std::forward<P>(params)...);
-    }
-
-    bool pop(T& item) {
-        return base_t::pop(item);
-    }
-};
-
-} // namespace ipc
diff --git a/src/libipc/shm.cpp b/src/libipc/shm.cpp
deleted file mode 100755
index 92f96ef4..00000000
--- a/src/libipc/shm.cpp
+++ /dev/null
@@ -1,103 +0,0 @@
-
-#include <string>
-#include <utility>
-
-#include "libipc/shm.h"
-
-#include "libipc/utility/pimpl.h"
-#include "libipc/memory/resource.h"
-
-namespace ipc {
-namespace shm {
-
-class handle::handle_ : public pimpl<handle_> {
-public:
-    shm::id_t id_ = nullptr;
-    void*     m_  = nullptr;
-
-    ipc::string n_;
-    std::size_t s_ = 0;
-};
-
-handle::handle()
-    : p_(p_->make()) {
-}
-
-handle::handle(char const * name, std::size_t size, unsigned mode)
-    : handle() {
-    acquire(name, size, mode);
-}
-
-handle::handle(handle&& rhs)
-    : handle() {
-    swap(rhs);
-}
-
-handle::~handle() {
-    release();
-    p_->clear();
-}
-
-void handle::swap(handle& rhs) {
-    std::swap(p_, rhs.p_);
-}
-
-handle& handle::operator=(handle rhs) {
-    swap(rhs);
-    return *this;
-}
-
-bool handle::valid() const noexcept {
-    return impl(p_)->m_ != nullptr;
-}
-
-std::size_t handle::size() const noexcept {
-    return impl(p_)->s_;
-}
-
-char const * handle::name() const noexcept {
-    return impl(p_)->n_.c_str();
-}
-
-std::int32_t handle::ref() const noexcept {
-    return shm::get_ref(impl(p_)->id_);
-}
-
-void handle::sub_ref() noexcept {
-    shm::sub_ref(impl(p_)->id_);
-}
-
-bool handle::acquire(char const * name, std::size_t size, unsigned mode) {
-    release();
-    impl(p_)->id_ = shm::acquire((impl(p_)->n_ = name).c_str(), size, mode);
-    impl(p_)->m_  = shm::get_mem(impl(p_)->id_, &(impl(p_)->s_));
-    return valid();
-}
-
-std::int32_t handle::release() {
-    if (impl(p_)->id_ == nullptr) return -1;
-    return shm::release(detach());
-}
-
-void* handle::get() const {
-    return impl(p_)->m_;
-}
-
-void handle::attach(id_t id) {
-    if (id == nullptr) return;
-    release();
-    impl(p_)->id_ = id;
-    impl(p_)->m_  = shm::get_mem(impl(p_)->id_, &(impl(p_)->s_));
-}
-
-id_t handle::detach() {
-    auto old = impl(p_)->id_;
-    impl(p_)->id_ = nullptr;
-    impl(p_)->m_  = nullptr;
-    impl(p_)->s_  = 0;
-    impl(p_)->n_.clear();
-    return old;
-}
-
-} // namespace shm
-} // namespace ipc
diff --git a/src/libipc/sync/condition.cpp b/src/libipc/sync/condition.cpp
deleted file mode 100644
index 06d90e19..00000000
--- a/src/libipc/sync/condition.cpp
+++ /dev/null
@@ -1,72 +0,0 @@
-
-#include "libipc/condition.h"
-
-#include "libipc/utility/pimpl.h"
-#include "libipc/memory/resource.h"
-#include "libipc/platform/detail.h"
-#if defined(IPC_OS_WINDOWS_)
-#include "libipc/platform/win/condition.h"
-#elif defined(IPC_OS_LINUX_)
-#include "libipc/platform/linux/condition.h"
-#elif defined(IPC_OS_QNX_)
-#include "libipc/platform/posix/condition.h"
-#else/*IPC_OS*/
-#   error "Unsupported platform."
-#endif
-
-namespace ipc {
-namespace sync {
-
-class condition::condition_ : public ipc::pimpl<condition_> {
-public:
-    ipc::detail::sync::condition cond_;
-};
-
-condition::condition()
-    : p_(p_->make()) {
-}
-
-condition::condition(char const * name)
-    : condition() {
-    open(name);
-}
-
-condition::~condition() {
-    close();
-    p_->clear();
-}
-
-void const *condition::native() const noexcept {
-    return impl(p_)->cond_.native();
-}
-
-void *condition::native() noexcept {
-    return impl(p_)->cond_.native();
-}
-
-bool condition::valid() const noexcept {
-    return impl(p_)->cond_.valid();
-}
-
-bool condition::open(char const *name) noexcept {
-    return impl(p_)->cond_.open(name);
-}
-
-void condition::close() noexcept {
-    impl(p_)->cond_.close();
-}
-
-bool condition::wait(ipc::sync::mutex &mtx, std::uint64_t tm) noexcept {
-    return impl(p_)->cond_.wait(mtx, tm);
-}
-
-bool condition::notify(ipc::sync::mutex &mtx) noexcept {
-    return impl(p_)->cond_.notify(mtx);
-}
-
-bool condition::broadcast(ipc::sync::mutex &mtx) noexcept {
-    return impl(p_)->cond_.broadcast(mtx);
-}
-
-} // namespace sync
-} // namespace ipc
diff --git a/src/libipc/sync/mutex.cpp b/src/libipc/sync/mutex.cpp
deleted file mode 100644
index 79f1a910..00000000
--- a/src/libipc/sync/mutex.cpp
+++ /dev/null
@@ -1,72 +0,0 @@
-
-#include "libipc/mutex.h"
-
-#include "libipc/utility/pimpl.h"
-#include "libipc/memory/resource.h"
-#include "libipc/platform/detail.h"
-#if defined(IPC_OS_WINDOWS_)
-#include "libipc/platform/win/mutex.h"
-#elif defined(IPC_OS_LINUX_)
-#include "libipc/platform/linux/mutex.h"
-#elif defined(IPC_OS_QNX_)
-#include "libipc/platform/posix/mutex.h"
-#else/*IPC_OS*/
-#   error "Unsupported platform."
-#endif
-
-namespace ipc {
-namespace sync {
-
-class mutex::mutex_ : public ipc::pimpl<mutex_> {
-public:
-    ipc::detail::sync::mutex lock_;
-};
-
-mutex::mutex()
-    : p_(p_->make()) {
-}
-
-mutex::mutex(char const * name)
-    : mutex() {
-    open(name);
-}
-
-mutex::~mutex() {
-    close();
-    p_->clear();
-}
-
-void const *mutex::native() const noexcept {
-    return impl(p_)->lock_.native();
-}
-
-void *mutex::native() noexcept {
-    return impl(p_)->lock_.native();
-}
-
-bool mutex::valid() const noexcept {
-    return impl(p_)->lock_.valid();
-}
-
-bool mutex::open(char const *name) noexcept {
-    return impl(p_)->lock_.open(name);
-}
-
-void mutex::close() noexcept {
-    impl(p_)->lock_.close();
-}
-
-bool mutex::lock(std::uint64_t tm) noexcept {
-    return impl(p_)->lock_.lock(tm);
-}
-
-bool mutex::try_lock() noexcept(false) {
-    return impl(p_)->lock_.try_lock();
-}
-
-bool mutex::unlock() noexcept {
-    return impl(p_)->lock_.unlock();
-}
-
-} // namespace sync
-} // namespace ipc
diff --git a/src/libipc/sync/semaphore.cpp b/src/libipc/sync/semaphore.cpp
deleted file mode 100644
index 23f6bdce..00000000
--- a/src/libipc/sync/semaphore.cpp
+++ /dev/null
@@ -1,66 +0,0 @@
-
-#include "libipc/semaphore.h"
-
-#include "libipc/utility/pimpl.h"
-#include "libipc/memory/resource.h"
-#include "libipc/platform/detail.h"
-#if defined(IPC_OS_WINDOWS_)
-#include "libipc/platform/win/semaphore.h"
-#elif defined(IPC_OS_LINUX_) || defined(IPC_OS_QNX_)
-#include "libipc/platform/posix/semaphore_impl.h"
-#else/*IPC_OS*/
-#   error "Unsupported platform."
-#endif
-
-namespace ipc {
-namespace sync {
-
-class semaphore::semaphore_ : public ipc::pimpl<semaphore_> {
-public:
-    ipc::detail::sync::semaphore sem_;
-};
-
-semaphore::semaphore()
-    : p_(p_->make()) {
-}
-
-semaphore::semaphore(char const * name, std::uint32_t count)
-    : semaphore() {
-    open(name, count);
-}
-
-semaphore::~semaphore() {
-    close();
-    p_->clear();
-}
-
-void const *semaphore::native() const noexcept {
-    return impl(p_)->sem_.native();
-}
-
-void *semaphore::native() noexcept {
-    return impl(p_)->sem_.native();
-}
-
-bool semaphore::valid() const noexcept {
-    return impl(p_)->sem_.valid();
-}
-
-bool semaphore::open(char const *name, std::uint32_t count) noexcept {
-    return impl(p_)->sem_.open(name, count);
-}
-
-void semaphore::close() noexcept {
-    impl(p_)->sem_.close();
-}
-
-bool semaphore::wait(std::uint64_t tm) noexcept {
-    return impl(p_)->sem_.wait(tm);
-}
-
-bool semaphore::post(std::uint32_t count) noexcept {
-    return impl(p_)->sem_.post(count);
-}
-
-} // namespace sync
-} // namespace ipc
diff --git a/src/libipc/utility/concept.h b/src/libipc/utility/concept.h
deleted file mode 100755
index 9325ddcf..00000000
--- a/src/libipc/utility/concept.h
+++ /dev/null
@@ -1,29 +0,0 @@
-#pragma once
-
-#include <type_traits>  // std::enable_if
-
-namespace ipc {
-
-// concept helpers
-
-template <bool Cond, typename R = void>
-using require = typename std::enable_if<Cond, R>::type;
-
-#ifdef IPC_CONCEPT_
-#   error "IPC_CONCEPT_ has been defined."
-#endif
-
-#define IPC_CONCEPT_(NAME, WHAT)                                       \
-template <typename T>                                                  \
-class NAME {                                                           \
-private:                                                               \
-    template <typename Type>                                           \
-    static std::true_type check(decltype(std::declval<Type>().WHAT)*); \
-    template <typename Type>                                           \
-    static std::false_type check(...);                                 \
-public:                                                                \
-    using type = decltype(check<T>(nullptr));                          \
-    constexpr static auto value = type::value;                         \
-}
-
-} // namespace ipc
diff --git a/src/libipc/utility/id_pool.h b/src/libipc/utility/id_pool.h
deleted file mode 100755
index 24d32e4f..00000000
--- a/src/libipc/utility/id_pool.h
+++ /dev/null
@@ -1,103 +0,0 @@
-#pragma once
-
-#include <type_traits>  // std::aligned_storage_t
-#include <cstring>      // std::memcmp
-#include <cstdint>
-
-#include "libipc/def.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-
-using storage_id_t = std::int32_t;
-
-template <std::size_t DataSize, std::size_t AlignSize>
-struct id_type;
-
-template <std::size_t AlignSize>
-struct id_type<0, AlignSize> {
-    uint_t<8> id_;
-
-    id_type& operator=(storage_id_t val) {
-        id_ = static_cast<uint_t<8>>(val);
-        return (*this);
-    }
-
-    operator uint_t<8>() const {
-        return id_;
-    }
-};
-
-template <std::size_t DataSize, std::size_t AlignSize>
-struct id_type : id_type<0, AlignSize> {
-    std::aligned_storage_t<DataSize, AlignSize> data_;
-};
-
-template <std::size_t DataSize  = 0,
-          std::size_t AlignSize = (ipc::detail::min)(DataSize, alignof(std::max_align_t))>
-class id_pool {
-
-    static constexpr std::size_t limited_max_count() {
-        return ipc::detail::min<std::size_t>(large_msg_cache, (std::numeric_limits<uint_t<8>>::max)());
-    }
-
-public:
-    enum : std::size_t {
-        /* eliminate error: taking address of temporary */
-        max_count = limited_max_count()
-    };
-
-private:
-    id_type<DataSize, AlignSize> next_[max_count];
-    uint_t<8> cursor_ = 0;
-    bool prepared_ = false;
-
-public:
-    void prepare() {
-        if (!prepared_ && this->invalid()) this->init();
-        prepared_ = true;
-    }
-
-    void init() {
-        for (storage_id_t i = 0; i < max_count;) {
-            i = next_[i] = (i + 1);
-        }
-    }
-
-    bool invalid() const {
-        static id_pool inv;
-        return std::memcmp(this, &inv, sizeof(id_pool)) == 0;
-    }
-
-    bool empty() const {
-        return cursor_ == max_count;
-    }
-
-    storage_id_t acquire() {
-        if (empty()) return -1;
-        storage_id_t id = cursor_;
-        cursor_ = next_[id]; // point to next
-        return id;
-    }
-
-    bool release(storage_id_t id) {
-        if (id < 0) return false;
-        next_[id] = cursor_;
-        cursor_ = static_cast<uint_t<8>>(id); // put it back
-        return true;
-    }
-
-    void       * at(storage_id_t id)       { return &(next_[id].data_); }
-    void const * at(storage_id_t id) const { return &(next_[id].data_); }
-};
-
-template <typename T>
-class obj_pool : public id_pool<sizeof(T), alignof(T)> {
-    using base_t = id_pool<sizeof(T), alignof(T)>;
-
-public:
-    T       * at(storage_id_t id)       { return reinterpret_cast<T       *>(base_t::at(id)); }
-    T const * at(storage_id_t id) const { return reinterpret_cast<T const *>(base_t::at(id)); }
-};
-
-} // namespace ipc
diff --git a/src/libipc/utility/log.h b/src/libipc/utility/log.h
deleted file mode 100755
index bb1dcea1..00000000
--- a/src/libipc/utility/log.h
+++ /dev/null
@@ -1,39 +0,0 @@
-#pragma once
-
-#include <cstdio>
-#include <utility>
-
-namespace ipc {
-namespace detail {
-
-template <typename O>
-void print(O out, char const * str) {
-    std::fprintf(out, "%s", str);
-}
-
-template <typename O, typename P1, typename... P>
-void print(O out, char const * fmt, P1&& p1, P&&... params) {
-    std::fprintf(out, fmt, std::forward<P1>(p1), std::forward<P>(params)...);
-}
-
-} // namespace detail
-
-inline void log(char const * fmt) {
-    ipc::detail::print(stdout, fmt);
-}
-
-template <typename P1, typename... P>
-void log(char const * fmt, P1&& p1, P&&... params) {
-    ipc::detail::print(stdout, fmt, std::forward<P1>(p1), std::forward<P>(params)...);
-}
-
-inline void error(char const * str) {
-    ipc::detail::print(stderr, str);
-}
-
-template <typename P1, typename... P>
-void error(char const * fmt, P1&& p1, P&&... params) {
-    ipc::detail::print(stderr, fmt, std::forward<P1>(p1), std::forward<P>(params)...);
-}
-
-} // namespace ipc
diff --git a/src/libipc/utility/pimpl.h b/src/libipc/utility/pimpl.h
deleted file mode 100755
index ca0edd3c..00000000
--- a/src/libipc/utility/pimpl.h
+++ /dev/null
@@ -1,64 +0,0 @@
-#pragma once
-
-#include <new>
-#include <utility>
-
-#include "libipc/platform/detail.h"
-#include "libipc/utility/concept.h"
-#include "libipc/pool_alloc.h"
-
-namespace ipc {
-
-// pimpl small object optimization helpers
-
-template <typename T, typename R = T*>
-using IsImplComfortable = ipc::require<(sizeof(T) <= sizeof(T*)), R>;
-
-template <typename T, typename R = T*>
-using IsImplUncomfortable = ipc::require<(sizeof(T) > sizeof(T*)), R>;
-
-template <typename T, typename... P>
-IPC_CONSTEXPR_ auto make_impl(P&&... params) -> IsImplComfortable<T> {
-    T* buf {};
-    ::new (&buf) T { std::forward<P>(params)... };
-    return buf;
-}
-
-template <typename T>
-IPC_CONSTEXPR_ auto impl(T* const (& p)) -> IsImplComfortable<T> {
-    return reinterpret_cast<T*>(&const_cast<char &>(reinterpret_cast<char const &>(p)));
-}
-
-template <typename T>
-IPC_CONSTEXPR_ auto clear_impl(T* p) -> IsImplComfortable<T, void> {
-    if (p != nullptr) impl(p)->~T();
-}
-
-template <typename T, typename... P>
-IPC_CONSTEXPR_ auto make_impl(P&&... params) -> IsImplUncomfortable<T> {
-    return mem::alloc<T>(std::forward<P>(params)...);
-}
-
-template <typename T>
-IPC_CONSTEXPR_ auto clear_impl(T* p) -> IsImplUncomfortable<T, void> {
-    mem::free(p);
-}
-
-template <typename T>
-IPC_CONSTEXPR_ auto impl(T* const (& p)) -> IsImplUncomfortable<T> {
-    return p;
-}
-
-template <typename T>
-struct pimpl {
-    template <typename... P>
-    IPC_CONSTEXPR_ static T* make(P&&... params) {
-        return make_impl<T>(std::forward<P>(params)...);
-    }
-
-    IPC_CONSTEXPR_ void clear() {
-        clear_impl(static_cast<T*>(const_cast<pimpl*>(this)));
-    }
-};
-
-} // namespace ipc
diff --git a/src/libipc/utility/scope_guard.h b/src/libipc/utility/scope_guard.h
deleted file mode 100644
index 9f421496..00000000
--- a/src/libipc/utility/scope_guard.h
+++ /dev/null
@@ -1,64 +0,0 @@
-#pragma once
-
-#include <utility>      // std::forward, std::move
-#include <algorithm>    // std::swap
-#include <type_traits>  // std::decay
-
-namespace ipc {
-
-////////////////////////////////////////////////////////////////
-/// Execute guard function when the enclosing scope exits
-////////////////////////////////////////////////////////////////
-
-template <typename F>
-class scope_guard {
-    F destructor_;
-    mutable bool dismiss_;
-
-public:
-    template <typename D>
-    scope_guard(D && destructor)
-        : destructor_(std::forward<D>(destructor))
-        , dismiss_(false) {
-    }
-
-    scope_guard(scope_guard&& rhs)
-        : destructor_(std::move(rhs.destructor_))
-        , dismiss_(true) /* dismiss rhs */ {
-        std::swap(dismiss_, rhs.dismiss_);
-    }
-
-    ~scope_guard() {
-        try { do_exit(); }
-        /**
-         * In the realm of exceptions, it is fundamental that you can do nothing
-         * if your "undo/recover" action fails.
-        */
-        catch (...) { /* Do nothing */ }
-    }
-
-    void swap(scope_guard & rhs) {
-        std::swap(destructor_, rhs.destructor_);
-        std::swap(dismiss_   , rhs.dismiss_);
-    }
-
-    void dismiss() const noexcept {
-        dismiss_ = true;
-    }
-
-    void do_exit() {
-        if (!dismiss_) {
-            dismiss_ = true;
-            destructor_();
-        }
-    }
-};
-
-template <typename D>
-constexpr auto guard(D && destructor) noexcept {
-    return scope_guard<std::decay_t<D>> {
-        std::forward<D>(destructor)
-    };
-}
-
-} // namespace ipc
\ No newline at end of file
diff --git a/src/libipc/utility/utility.h b/src/libipc/utility/utility.h
deleted file mode 100755
index 79424d95..00000000
--- a/src/libipc/utility/utility.h
+++ /dev/null
@@ -1,64 +0,0 @@
-#pragma once
-
-#include <utility>      // std::forward, std::integer_sequence
-#include <cstddef>      // std::size_t
-#include <new>          // std::hardware_destructive_interference_size
-#include <type_traits>  // std::is_trivially_copyable
-
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-
-template <typename F, typename D>
-constexpr decltype(auto) static_switch(std::size_t /*i*/, std::index_sequence<>, F&& /*f*/, D&& def) {
-    return std::forward<D>(def)();
-}
-
-template <typename F, typename D, std::size_t N, std::size_t...I>
-constexpr decltype(auto) static_switch(std::size_t i, std::index_sequence<N, I...>, F&& f, D&& def) {
-    return (i == N) ? std::forward<F>(f)(std::integral_constant<std::size_t, N>{}) :
-                      static_switch(i, std::index_sequence<I...>{}, std::forward<F>(f), std::forward<D>(def));
-}
-
-template <std::size_t N, typename F, typename D>
-constexpr decltype(auto) static_switch(std::size_t i, F&& f, D&& def) {
-    return static_switch(i, std::make_index_sequence<N>{}, std::forward<F>(f), std::forward<D>(def));
-}
-
-template <typename F, std::size_t...I>
-IPC_CONSTEXPR_ void static_for(std::index_sequence<I...>, F&& f) {
-    IPC_UNUSED_ auto expand = { (std::forward<F>(f)(std::integral_constant<std::size_t, I>{}), 0)... };
-}
-
-template <std::size_t N, typename F>
-IPC_CONSTEXPR_ void static_for(F&& f) {
-    static_for(std::make_index_sequence<N>{}, std::forward<F>(f));
-}
-
-// Minimum offset between two objects to avoid false sharing.
-enum {
-// #if __cplusplus >= 201703L
-//     cache_line_size = std::hardware_destructive_interference_size
-// #else /*__cplusplus < 201703L*/
-    cache_line_size = 64
-// #endif/*__cplusplus < 201703L*/
-};
-
-template <typename T, typename U>
-auto horrible_cast(U rhs) noexcept
-    -> typename std::enable_if<std::is_trivially_copyable<T>::value
-                            && std::is_trivially_copyable<U>::value, T>::type {
-    union {
-        T t;
-        U u;
-    } r = {};
-    r.u = rhs;
-    return r.t;
-}
-
-IPC_CONSTEXPR_ std::size_t make_align(std::size_t align, std::size_t size) {
-    // align must be 2^n
-    return (size + align - 1) & ~(align - 1);
-}
-
-} // namespace ipc
diff --git a/src/libipc/waiter.h b/src/libipc/waiter.h
deleted file mode 100644
index 130bc984..00000000
--- a/src/libipc/waiter.h
+++ /dev/null
@@ -1,81 +0,0 @@
-#pragma once
-
-#include <utility>
-#include <string>
-#include <mutex>
-#include <atomic>
-
-#include "libipc/def.h"
-#include "libipc/mutex.h"
-#include "libipc/condition.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace detail {
-
-class waiter {
-    ipc::sync::condition cond_;
-    ipc::sync::mutex     lock_;
-    std::atomic<bool>    quit_ {false};
-
-public:
-    waiter() = default;
-    waiter(char const *name) {
-        open(name);
-    }
-
-    ~waiter() {
-        close();
-    }
-
-    bool valid() const noexcept {
-        return cond_.valid() && lock_.valid();
-    }
-
-    bool open(char const *name) noexcept {
-        quit_.store(false, std::memory_order_relaxed);
-        if (!cond_.open((std::string{"_waiter_cond_"} + name).c_str())) {
-            return false;
-        }
-        if (!lock_.open((std::string{"_waiter_lock_"} + name).c_str())) {
-            cond_.close();
-            return false;
-        }
-        return valid();
-    }
-
-    void close() noexcept {
-        cond_.close();
-        lock_.close();
-    }
-
-    template <typename F>
-    bool wait_if(F &&pred, std::uint64_t tm = ipc::invalid_value) noexcept {
-        IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard {lock_};
-        while ([this, &pred] {
-                    return !quit_.load(std::memory_order_relaxed)
-                        && std::forward<F>(pred)();
-                }()) {
-            if (!cond_.wait(lock_, tm)) return false;
-        }
-        return true;
-    }
-
-    bool notify() noexcept {
-        { IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard {lock_}; } // barrier
-        return cond_.notify(lock_);
-    }
-
-    bool broadcast() noexcept {
-        { IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard {lock_}; } // barrier
-        return cond_.broadcast(lock_);
-    }
-
-    bool quit_waiting() {
-        quit_.store(true, std::memory_order_release);
-        return broadcast();
-    }
-};
-
-} // namespace detail
-} // namespace ipc
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 9398aa30..dfd7fc24 100755
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -9,16 +9,13 @@ if(NOT MSVC)
 endif()
 
 include_directories(
-    ${LIBIPC_PROJECT_DIR}/include 
-    ${LIBIPC_PROJECT_DIR}/src
-    ${LIBIPC_PROJECT_DIR}/test
-    ${LIBIPC_PROJECT_DIR}/3rdparty
-    ${LIBIPC_PROJECT_DIR}/3rdparty/gtest/include)
+  ${LIBIPC_PROJECT_DIR}/include 
+  ${LIBIPC_PROJECT_DIR}/src
+  ${LIBIPC_PROJECT_DIR}/test
+  ${LIBIPC_PROJECT_DIR}/3rdparty
+  ${LIBIPC_PROJECT_DIR}/3rdparty/gtest/include)
 
-file(GLOB SRC_FILES
-    ${LIBIPC_PROJECT_DIR}/test/*.cpp
-    # ${LIBIPC_PROJECT_DIR}/test/profiler/*.cpp
-    )
+file(GLOB SRC_FILES  ${LIBIPC_PROJECT_DIR}/test/*.cpp)
 file(GLOB HEAD_FILES ${LIBIPC_PROJECT_DIR}/test/*.h)
 
 add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
diff --git a/test/test.h b/test/test.h
deleted file mode 100755
index 19bd22bf..00000000
--- a/test/test.h
+++ /dev/null
@@ -1,86 +0,0 @@
-#pragma once
-
-#include <iostream>
-#include <atomic>
-#include <thread>
-#include <string>
-#include <memory>
-#include <mutex>
-#include <utility>
-
-#include "gtest/gtest.h"
-
-#include "capo/stopwatch.hpp"
-
-#include "thread_pool.h"
-
-namespace ipc_ut {
-
-template <typename Dur>
-struct unit;
-
-template <> struct unit<std::chrono::nanoseconds> {
-    constexpr static char const * str() noexcept {
-        return "ns";
-    }
-};
-
-template <> struct unit<std::chrono::microseconds> {
-    constexpr static char const * str() noexcept {
-        return "us";
-    }
-};
-
-template <> struct unit<std::chrono::milliseconds> {
-    constexpr static char const * str() noexcept {
-        return "ms";
-    }
-};
-
-template <> struct unit<std::chrono::seconds> {
-    constexpr static char const * str() noexcept {
-        return "sec";
-    }
-};
-
-struct test_stopwatch {
-    capo::stopwatch<> sw_;
-    std::atomic_flag started_ = ATOMIC_FLAG_INIT;
-
-    void start() {
-        if (!started_.test_and_set()) {
-            sw_.start();
-        }
-    }
-
-    template <typename ToDur = std::chrono::nanoseconds>
-    void print_elapsed(int N, int Loops, char const * message = "") {
-        auto ts = sw_.elapsed<ToDur>();
-        std::cout << "[" << N << ", \t" << Loops << "] " << message << "\t"
-                  << (double(ts) / double(Loops)) << " " << unit<ToDur>::str() << std::endl;
-    }
-
-    template <int Factor, typename ToDur = std::chrono::nanoseconds>
-    void print_elapsed(int N, int M, int Loops, char const * message = "") {
-        auto ts = sw_.elapsed<ToDur>();
-        std::cout << "[" << N << "-" << M << ", \t" << Loops << "] " << message << "\t"
-                  << (double(ts) / double(Factor ? (Loops * Factor) : (Loops * N))) << " " << unit<ToDur>::str() << std::endl;
-    }
-
-    template <typename ToDur = std::chrono::nanoseconds>
-    void print_elapsed(int N, int M, int Loops, char const * message = "") {
-        print_elapsed<0, ToDur>(N, M, Loops, message);
-    }
-};
-
-inline static thread_pool & sender() {
-    static thread_pool pool;
-    return pool;
-}
-
-inline static thread_pool & reader() {
-    static thread_pool pool;
-    return pool;
-}
-
-} // namespace ipc_ut
\ No newline at end of file
diff --git a/test/test_detect_plat.cpp b/test/test_detect_plat.cpp
new file mode 100644
index 00000000..ca62b1ce
--- /dev/null
+++ b/test/test_detect_plat.cpp
@@ -0,0 +1,79 @@
+
+#include <iostream>
+#include <cstdint>
+
+#include "gtest/gtest.h"
+
+#include "libipc/detect_plat.h"
+
+namespace {
+
+} // namespace
+
+TEST(detect_plat, os) {
+#if defined(LIBIPC_OS_WINCE)
+  std::cout << "LIBIPC_OS_WINCE\n";
+#elif defined(LIBIPC_OS_WIN)
+  std::cout << "LIBIPC_OS_WIN\n";
+#elif defined(LIBIPC_OS_LINUX)
+  std::cout << "LIBIPC_OS_LINUX\n";
+#elif defined(LIBIPC_OS_QNX)
+  std::cout << "LIBIPC_OS_QNX\n";
+#elif defined(LIBIPC_OS_ANDROID)
+  std::cout << "LIBIPC_OS_ANDROID\n";
+#else
+  ASSERT_TRUE(false);
+#endif
+}
+
+TEST(detect_plat, cc) {
+#if defined(LIBIPC_CC_MSVC)
+  std::cout << "LIBIPC_CC_MSVC\n";
+#elif defined(LIBIPC_CC_GNUC)
+  std::cout << "LIBIPC_CC_GNUC\n";
+#else
+  ASSERT_TRUE(false);
+#endif
+}
+
+TEST(detect_plat, byte_order) {
+  auto is_endian_little = [] {
+    union {
+      std::int32_t a;
+      std::int8_t  b;
+    } c;
+    c.a = 1;
+    return c.b == 1;
+  };
+  EXPECT_EQ(!!LIBIPC_ENDIAN_LIT, is_endian_little());
+  EXPECT_NE(!!LIBIPC_ENDIAN_BIG, is_endian_little());
+}
+
+TEST(detect_plat, fallthrough) {
+  switch (0) {
+  case 1:
+    std::cout << "fallthrough 0\n";
+    LIBIPC_FALLTHROUGH;
+  case 0:
+    std::cout << "fallthrough 1\n";
+    LIBIPC_FALLTHROUGH;
+  default:
+    std::cout << "fallthrough default\n";
+    break;
+  }
+}
+
+TEST(detect_plat, unused) {
+  LIBIPC_UNUSED int abc;
+}
+
+TEST(detect_plat, likely_unlikely) {
+  int xx = sizeof(int);
+  if LIBIPC_LIKELY(xx < sizeof(long long)) {
+    std::cout << "sizeof(int) < sizeof(long long)\n";
+  } else if LIBIPC_UNLIKELY(xx < sizeof(char)) {
+    std::cout << "sizeof(int) < sizeof(char)\n";
+  } else {
+    std::cout << "sizeof(int) < whatever\n";
+  }
+}
\ No newline at end of file
diff --git a/test/test_ipc.cpp b/test/test_ipc.cpp
deleted file mode 100755
index 695e6743..00000000
--- a/test/test_ipc.cpp
+++ /dev/null
@@ -1,183 +0,0 @@
-
-#include <vector>
-#include <iostream>
-#include <mutex>
-#include <atomic>
-#include <cstring>
-
-#include "libipc/ipc.h"
-#include "libipc/buffer.h"
-#include "libipc/memory/resource.h"
-
-#include "test.h"
-#include "thread_pool.h"
-
-#include "capo/random.hpp"
-
-using namespace ipc;
-
-namespace {
-
-constexpr int LoopCount   = 10000;
-constexpr int MultiMax    = 8;
-constexpr int TestBuffMax = 65536;
-
-struct msg_head {
-    int id_;
-};
-
-class rand_buf : public buffer {
-public:
-    rand_buf() {
-        int size = capo::random<>{(int)sizeof(msg_head), TestBuffMax}();
-        *this = buffer(new char[size], size, [](void * p, std::size_t) {
-            delete [] static_cast<char *>(p);
-        });
-    }
-
-    rand_buf(msg_head const &msg) {
-        *this = buffer(new msg_head{msg}, sizeof(msg), [](void * p, std::size_t) {
-            delete static_cast<msg_head *>(p);
-        });
-    }
-
-    rand_buf(rand_buf &&) = default;
-    rand_buf(rand_buf const & rhs) {
-        if (rhs.empty()) return;
-        void * mem = new char[rhs.size()];
-        std::memcpy(mem, rhs.data(), rhs.size());
-        *this = buffer(mem, rhs.size(), [](void * p, std::size_t) {
-            delete [] static_cast<char *>(p);
-        });
-    }
-
-    rand_buf(buffer && rhs)
-        : buffer(std::move(rhs)) {
-    }
-
-    void set_id(int k) noexcept {
-        get<msg_head *>()->id_ = k;
-    }
-
-    int get_id() const noexcept {
-        return get<msg_head *>()->id_;
-    }
-
-    using buffer::operator=;
-};
-
-template <relat Rp, relat Rc, trans Ts>
-void test_basic(char const * name) {
-    using que_t = chan<Rp, Rc, Ts>;
-    rand_buf test1, test2;
-
-    que_t que1 { name };
-    EXPECT_FALSE(que1.send(test1));
-
-    que_t que2 { que1.name(), ipc::receiver };
-    ASSERT_TRUE(que1.send(test1));
-
-    EXPECT_EQ(que2.recv(), test1);
-    EXPECT_EQ(que2.recv(), test2);
-}
-
-class data_set {
-    std::vector<rand_buf> datas_;
-
-public:
-    data_set() {
-        datas_.resize(LoopCount);
-        for (int i = 0; i < LoopCount; ++i) {
-            datas_[i].set_id(i);
-        }
-    }
-
-    std::vector<rand_buf> const &get() const noexcept {
-        return datas_;
-    }
-} const data_set__;
-
-template <relat Rp, relat Rc, trans Ts, typename Que = chan<Rp, Rc, Ts>>
-void test_sr(char const * name, int s_cnt, int r_cnt) {
-    ipc_ut::sender().start(static_cast<std::size_t>(s_cnt));
-    ipc_ut::reader().start(static_cast<std::size_t>(r_cnt));
-
-    std::atomic_thread_fence(std::memory_order_seq_cst);
-    ipc_ut::test_stopwatch sw;
-
-    for (int k = 0; k < s_cnt; ++k) {
-        ipc_ut::sender() << [name, &sw, r_cnt, k] {
-            Que que { name, ipc::sender };
-            ASSERT_TRUE(que.wait_for_recv(r_cnt));
-            sw.start();
-            for (int i = 0; i < (int)data_set__.get().size(); ++i) {
-                ASSERT_TRUE(que.send(data_set__.get()[i]));
-            }
-        };
-    }
-
-    for (int k = 0; k < r_cnt; ++k) {
-        ipc_ut::reader() << [name] {
-            Que que { name, ipc::receiver };
-            for (;;) {
-                rand_buf got { que.recv() };
-                ASSERT_FALSE(got.empty());
-                int i = got.get_id();
-                if (i == -1) {
-                    return;
-                }
-                ASSERT_TRUE((i >= 0) && (i < (int)data_set__.get().size()));
-                auto const &data_set = data_set__.get()[i];
-                if (data_set != got) {
-                    printf("data_set__.get()[%d] != got, size = %zd/%zd\n", 
-                            i, data_set.size(), got.size());
-                    ASSERT_TRUE(false);
-                }
-            }
-        };
-    }
-
-    ipc_ut::sender().wait_for_done();
-    Que que { name };
-    ASSERT_TRUE(que.wait_for_recv(r_cnt));
-    for (int k = 0; k < r_cnt; ++k) {
-        que.send(rand_buf{msg_head{-1}});
-    }
-    ipc_ut::reader().wait_for_done();
-    sw.print_elapsed<std::chrono::microseconds>(s_cnt, r_cnt, (int)data_set__.get().size(), name);
-}
-
-} // internal-linkage
-
-TEST(IPC, basic) {
-    test_basic<relat::single, relat::single, trans::unicast  >("ssu");
-    //test_basic<relat::single, relat::multi , trans::unicast  >("smu");
-    //test_basic<relat::multi , relat::multi , trans::unicast  >("mmu");
-    test_basic<relat::single, relat::multi , trans::broadcast>("smb");
-    test_basic<relat::multi , relat::multi , trans::broadcast>("mmb");
-}
-
-TEST(IPC, 1v1) {
-    test_sr<relat::single, relat::single, trans::unicast  >("ssu", 1, 1);
-    //test_sr<relat::single, relat::multi , trans::unicast  >("smu", 1, 1);
-    //test_sr<relat::multi , relat::multi , trans::unicast  >("mmu", 1, 1);
-    test_sr<relat::single, relat::multi , trans::broadcast>("smb", 1, 1);
-    test_sr<relat::multi , relat::multi , trans::broadcast>("mmb", 1, 1);
-}
-
-TEST(IPC, 1vN) {
-    //test_sr<relat::single, relat::multi , trans::unicast  >("smu", 1, MultiMax);
-    //test_sr<relat::multi , relat::multi , trans::unicast  >("mmu", 1, MultiMax);
-    test_sr<relat::single, relat::multi , trans::broadcast>("smb", 1, MultiMax);
-    test_sr<relat::multi , relat::multi , trans::broadcast>("mmb", 1, MultiMax);
-}
-
-TEST(IPC, Nv1) {
-    //test_sr<relat::multi , relat::multi , trans::unicast  >("mmu", MultiMax, 1);
-    test_sr<relat::multi , relat::multi , trans::broadcast>("mmb", MultiMax, 1);
-}
-
-TEST(IPC, NvN) {
-    //test_sr<relat::multi , relat::multi , trans::unicast  >("mmu", MultiMax, MultiMax);
-    test_sr<relat::multi , relat::multi , trans::broadcast>("mmb", MultiMax, MultiMax);
-}
diff --git a/test/test_mem.cpp b/test/test_mem.cpp
deleted file mode 100755
index 16a5ad1d..00000000
--- a/test/test_mem.cpp
+++ /dev/null
@@ -1,218 +0,0 @@
-#include <vector>
-#include <array>
-#include <thread>
-#include <atomic>
-#include <cstddef>
-
-#include "capo/random.hpp"
-
-#include "libipc/memory/resource.h"
-#include "libipc/pool_alloc.h"
-
-// #include "gperftools/tcmalloc.h"
-
-#include "test.h"
-#include "thread_pool.h"
-
-namespace {
-
-constexpr int DataMin   = 4;
-constexpr int DataMax   = 256;
-constexpr int LoopCount = 8388608;
-constexpr int ThreadMax = 8;
-
-// constexpr int DataMin   = 256;
-// constexpr int DataMax   = 512;
-// constexpr int LoopCount = 2097152;
-
-std::vector<std::size_t> sizes__;
-std::vector<void*> ptr_cache__[ThreadMax];
-
-template <typename M>
-struct alloc_ix_t {
-    static std::vector<int> ix_;
-    static bool inited_;
-
-    alloc_ix_t() {
-        if (inited_) return;
-        inited_ = true;
-        M::init();
-    }
-
-    template <int ThreadsN>
-    static int index(std::size_t /*pid*/, std::size_t /*k*/, std::size_t n) {
-        return ix_[n];
-    }
-};
-
-template <typename M>
-std::vector<int> alloc_ix_t<M>::ix_(LoopCount);
-template <typename M>
-bool alloc_ix_t<M>::inited_ = false;
-
-struct alloc_FIFO : alloc_ix_t<alloc_FIFO> {
-    static void init() {
-        for (int i = 0; i < LoopCount; ++i) {
-            ix_[static_cast<std::size_t>(i)] = i;
-        }
-    }
-};
-
-struct alloc_LIFO : alloc_ix_t<alloc_LIFO> {
-    static void init() {
-        for (int i = 0; i < LoopCount; ++i) {
-            ix_[static_cast<std::size_t>(i)] = i;
-        }
-    }
-
-    template <int ThreadsN>
-    static int index(std::size_t pid, std::size_t k, std::size_t n) {
-        constexpr static int CacheSize = LoopCount / ThreadsN;
-        if (k) {
-            return ix_[(CacheSize * (2 * pid + 1)) - 1 - n];
-        }
-        else return ix_[n];
-    }
-};
-
-struct alloc_Random : alloc_ix_t<alloc_Random> {
-    static void init() {
-        capo::random<> rdm_index(0, LoopCount - 1);
-        for (int i = 0; i < LoopCount; ++i) {
-            ix_[static_cast<std::size_t>(i)] = rdm_index();
-        }
-    }
-};
-
-struct Init {
-    Init() {
-        capo::random<> rdm{ DataMin, DataMax };
-        for (int i = 0; i < LoopCount; ++i) {
-            sizes__.emplace_back(static_cast<std::size_t>(rdm()));
-        }
-        for (auto& vec : ptr_cache__) {
-            vec.resize(LoopCount, nullptr);
-        }
-    }
-} init__;
-
-template <typename AllocT, int ThreadsN>
-void benchmark_alloc(char const * message) {
-    std::string msg = std::to_string(ThreadsN) + "\t" + message;
-
-    constexpr static int CacheSize = LoopCount / ThreadsN;
-    ipc_ut::sender().start(static_cast<std::size_t>(ThreadsN));
-    ipc_ut::test_stopwatch sw;
-
-    for (int pid = 0; pid < ThreadsN; ++pid) {
-        ipc_ut::sender() << [&, pid] {
-            sw.start();
-            for (int n = (CacheSize * pid); n < (CacheSize * (pid + 1)); ++n) {
-                std::size_t s = sizes__[n];
-                AllocT::free(AllocT::alloc(s), s);
-            }
-        };
-    }
-
-    ipc_ut::sender().wait_for_done();
-    sw.print_elapsed<1>(DataMin, DataMax, LoopCount, msg.c_str());
-}
-
-template <typename AllocT, typename ModeT, int ThreadsN>
-void benchmark_alloc(char const * message) {
-    std::string msg = std::to_string(ThreadsN) + "\t" + message;
-
-    constexpr static int CacheSize = LoopCount / ThreadsN;
-    ModeT mode;
-    ipc_ut::sender().start(static_cast<std::size_t>(ThreadsN));
-    ipc_ut::test_stopwatch sw;
-
-    for (int pid = 0; pid < ThreadsN; ++pid) {
-        ipc_ut::sender() << [&, pid] {
-            auto& vec = ptr_cache__[pid];
-            sw.start();
-            for (std::size_t k = 0; k < 2; ++k)
-            for (int n = (CacheSize * pid); n < (CacheSize * (pid + 1)); ++n) {
-                int    m = mode.template index<ThreadsN>(pid, k, n);
-                void*& p = vec[static_cast<std::size_t>(m)];
-                std::size_t s  = sizes__[static_cast<std::size_t>(m)];
-                if (p == nullptr) {
-                    p = AllocT::alloc(s);
-                }
-                else {
-                    AllocT::free(p, s);
-                    p = nullptr;
-                }
-            }
-        };
-    }
-
-    ipc_ut::sender().wait_for_done();
-    sw.print_elapsed<1>(DataMin, DataMax, LoopCount, msg.c_str());
-}
-
-template <typename AllocT, typename ModeT, int ThreadsN>
-struct test_performance {
-    static void start(char const * message) {
-        test_performance<AllocT, ModeT, ThreadsN / 2>::start(message);
-        benchmark_alloc<AllocT, ModeT, ThreadsN>(message);
-    }
-};
-
-template <typename AllocT, typename ModeT>
-struct test_performance<AllocT, ModeT, 1> {
-    static void start(char const * message) {
-        benchmark_alloc<AllocT, ModeT, 1>(message);
-    }
-};
-
-template <typename AllocT, int ThreadsN>
-struct test_performance<AllocT, void, ThreadsN> {
-    static void start(char const * message) {
-        test_performance<AllocT, void, ThreadsN / 2>::start(message);
-        benchmark_alloc<AllocT, ThreadsN>(message);
-    }
-};
-
-template <typename AllocT>
-struct test_performance<AllocT, void, 1> {
-    static void start(char const * message) {
-        benchmark_alloc<AllocT, 1>(message);
-    }
-};
-
-// class tc_alloc {
-// public:
-//    static void clear() {}
-
-//    static void* alloc(std::size_t size) {
-//        return size ? tc_malloc(size) : nullptr;
-//    }
-
-//    static void free(void* p, std::size_t size) {
-//        tc_free_sized(p, size);
-//    }
-// };
-/*
-TEST(Memory, static_alloc) {
-    test_performance<ipc::mem::static_alloc, void        , ThreadMax>::start("alloc-free");
-    test_performance<ipc::mem::static_alloc, alloc_FIFO  , ThreadMax>::start("alloc-FIFO");
-    test_performance<ipc::mem::static_alloc, alloc_LIFO  , ThreadMax>::start("alloc-LIFO");
-    test_performance<ipc::mem::static_alloc, alloc_Random, ThreadMax>::start("alloc-Rand");
-}
-
-TEST(Memory, pool_alloc) {
-    test_performance<ipc::mem::async_pool_alloc, void        , ThreadMax>::start("alloc-free");
-    test_performance<ipc::mem::async_pool_alloc, alloc_FIFO  , ThreadMax>::start("alloc-FIFO");
-    test_performance<ipc::mem::async_pool_alloc, alloc_LIFO  , ThreadMax>::start("alloc-LIFO");
-    test_performance<ipc::mem::async_pool_alloc, alloc_Random, ThreadMax>::start("alloc-Rand");
-}
-*/
-// TEST(Memory, tc_alloc) {
-//     test_performance<tc_alloc, void       , ThreadMax>::start();
-//     test_performance<tc_alloc, alloc_FIFO  , ThreadMax>::start();
-//     test_performance<tc_alloc, alloc_LIFO  , ThreadMax>::start();
-//     test_performance<tc_alloc, alloc_Random, ThreadMax>::start();
-// }
-
-} // internal-linkage
diff --git a/test/test_platform.cpp b/test/test_platform.cpp
deleted file mode 100644
index 65fa5135..00000000
--- a/test/test_platform.cpp
+++ /dev/null
@@ -1,31 +0,0 @@
-#if defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
-    defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
-    defined(WINCE) || defined(_WIN32_WCE)
-
-#include <locale>
-#include <iostream>
-//#include <fstream>
-
-#include "test.h"
-
-#include "libipc/platform/win/to_tchar.h"
-
-TEST(Platform, to_tchar) {
-    char const *utf8 = "hello world, "
-                       "\xe4\xbd\xa0\xe5\xa5\xbd\xef\xbc"
-                       "\x8c\xe3\x81\x93\xe3\x82\x93\xe3"
-                       "\x81\xab\xe3\x81\xa1\xe3\x81\xaf";
-    wchar_t const *utf16 = L"hello world, \u4f60\u597d\uff0c\u3053\u3093\u306b\u3061\u306f";
-    {
-        ipc::string str = ipc::detail::to_tchar<char>(utf8);
-        EXPECT_STREQ(str.c_str(), utf8);
-    }
-    {
-        ipc::wstring wtr = ipc::detail::to_tchar<wchar_t>(utf8);
-        EXPECT_STREQ(wtr.c_str(), utf16);
-        //std::ofstream out("out.txt", std::ios::binary|std::ios::out);
-        //out.write((char const *)wtr.c_str(), wtr.size() * sizeof(wchar_t));
-    }
-}
-
-#endif/*WIN*/
\ No newline at end of file
diff --git a/test/test_queue.cpp b/test/test_queue.cpp
deleted file mode 100755
index 1d2c7321..00000000
--- a/test/test_queue.cpp
+++ /dev/null
@@ -1,299 +0,0 @@
-#include <iostream>
-#include <string>
-#include <type_traits>
-#include <memory>
-#include <new>
-#include <vector>
-#include <unordered_map>
-
-#include "libipc/prod_cons.h"
-#include "libipc/policy.h"
-#include "libipc/circ/elem_array.h"
-#include "libipc/queue.h"
-
-#include "test.h"
-
-namespace {
-
-struct msg_t {
-    int pid_;
-    int dat_;
-
-    msg_t() = default;
-    msg_t(int p, int d) : pid_(p), dat_(d) {}
-};
-
-template <ipc::relat Rp, ipc::relat Rc, ipc::trans Ts>
-using queue_t = ipc::queue<msg_t, ipc::policy::choose<ipc::circ::elem_array, ipc::wr<Rp, Rc, Ts>>>;
-
-template <ipc::relat Rp, ipc::relat Rc, ipc::trans Ts>
-struct elems_t : public queue_t<Rp, Rc, Ts>::elems_t {};
-
-bool operator==(msg_t const & m1, msg_t const & m2) noexcept {
-    return (m1.pid_ == m2.pid_) && (m1.dat_ == m2.dat_);
-}
-
-bool operator!=(msg_t const & m1, msg_t const & m2) noexcept {
-    return !(m1 == m2);
-}
-
-constexpr int LoopCount = 1000000;
-constexpr int PushRetry = 1000000;
-constexpr int ThreadMax = 8;
-
-template <typename Que>
-void push(Que & que, int p, int d) {
-    for (int n = 0; !que.push([](void*) { return true; }, p, d); ++n) {
-        ASSERT_NE(n, PushRetry);
-        std::this_thread::yield();
-    }
-}
-
-template <typename Que>
-msg_t pop(Que & que) {
-    msg_t msg;
-    while (!que.pop(msg)) {
-        std::this_thread::yield();
-    }
-    return msg;
-}
-
-template <ipc::trans Ts>
-struct quitter;
-
-template <>
-struct quitter<ipc::trans::unicast> {
-    template <typename Que>
-    static void emit(Que && que, int r_cnt) {
-        for (int k = 0; k < r_cnt; ++k) {
-            push(que, -1, -1);
-        }
-    }
-};
-
-template <>
-struct quitter<ipc::trans::broadcast> {
-    template <typename Que>
-    static void emit(Que && que, int /*r_cnt*/) {
-        push(que, -1, -1);
-    }
-};
-
-template <ipc::relat Rp, ipc::relat Rc, ipc::trans Ts>
-void test_sr(elems_t<Rp, Rc, Ts> && elems, int s_cnt, int r_cnt, char const * message) {
-    ipc_ut::sender().start(static_cast<std::size_t>(s_cnt));
-    ipc_ut::reader().start(static_cast<std::size_t>(r_cnt));
-    ipc_ut::test_stopwatch sw;
-
-    for (int k = 0; k < s_cnt; ++k) {
-        ipc_ut::sender() << [&elems, &sw, r_cnt, k] {
-            queue_t<Rp, Rc, Ts> que { &elems };
-            while (que.conn_count() != static_cast<std::size_t>(r_cnt)) {
-                std::this_thread::yield();
-            }
-            sw.start();
-            for (int i = 0; i < LoopCount; ++i) {
-                push(que, k, i);
-            }
-        };
-    }
-    for (int k = 0; k < r_cnt; ++k) {
-        ipc_ut::reader() << [&elems, k] {
-            queue_t<Rp, Rc, Ts> que { &elems };
-            ASSERT_TRUE(que.connect());
-            while (pop(que).pid_ >= 0) ;
-            ASSERT_TRUE(que.disconnect());
-        };
-    }
-
-    ipc_ut::sender().wait_for_done();
-    quitter<Ts>::emit(queue_t<Rp, Rc, Ts> { &elems }, r_cnt);
-    ipc_ut::reader().wait_for_done();
-    sw.print_elapsed(s_cnt, r_cnt, LoopCount, message);
-}
-
-} // internal-linkage
-
-TEST(Queue, check_size) {
-    using el_t = elems_t<ipc::relat::single, ipc::relat::multi, ipc::trans::broadcast>;
-
-    std::cout << "cq_t::head_size  = " << el_t::head_size << std::endl;
-    std::cout << "cq_t::data_size  = " << el_t::data_size << std::endl;
-    std::cout << "cq_t::elem_size  = " << el_t::elem_size << std::endl;
-    std::cout << "cq_t::block_size = " << el_t::block_size << std::endl;
-
-    EXPECT_EQ(static_cast<std::size_t>(el_t::data_size), sizeof(msg_t));
-
-    std::cout << "sizeof(elems_t<s, m, b>) = " << sizeof(el_t) << std::endl;
-}
-
-TEST(Queue, el_connection) {
-    {
-        elems_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> el;
-        EXPECT_TRUE(el.connect_sender());
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_FALSE(el.connect_sender());
-        }
-        el.disconnect_sender();
-        EXPECT_TRUE(el.connect_sender());
-    }
-    {
-        elems_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::unicast> el;
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_TRUE(el.connect_sender());
-        }
-        el.disconnect_sender();
-        EXPECT_TRUE(el.connect_sender());
-    }
-    {
-        elems_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> el;
-        auto cc = el.connect_receiver();
-        EXPECT_NE(cc, 0);
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_EQ(el.connect_receiver(), 0);
-        }
-        EXPECT_EQ(el.disconnect_receiver(cc), 0);
-        EXPECT_EQ(el.connect_receiver(), cc);
-    }
-    {
-        elems_t<ipc::relat::single, ipc::relat::multi, ipc::trans::broadcast> el;
-        auto cc = el.connect_receiver();
-        EXPECT_EQ(cc, 1);
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_NE(el.connect_receiver(), 0);
-        }
-        EXPECT_EQ(el.disconnect_receiver(cc), 10000);
-        EXPECT_EQ(el.connect_receiver(), 10000 + cc);
-    }
-}
-
-TEST(Queue, connection) {
-    {
-        elems_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> el;
-        queue_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> que{&el};
-        // sending
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_TRUE(que.ready_sending());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> que{&el};
-            ASSERT_FALSE(que.ready_sending());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            que.shut_sending();
-        }
-        {
-            queue_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> que{&el};
-            EXPECT_TRUE(que.ready_sending());
-        }
-        // receiving
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_TRUE(que.connect());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> que{&el};
-            ASSERT_FALSE(que.connect());
-        }
-        EXPECT_TRUE(que.disconnect());
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_FALSE(que.disconnect());
-        }
-        {
-            queue_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> que{&el};
-            EXPECT_TRUE(que.connect());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> que{&el};
-            ASSERT_FALSE(que.connect());
-        }
-    }
-    {
-        elems_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> el;
-        queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-        // sending
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_TRUE(que.ready_sending());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_TRUE(que.ready_sending());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            que.shut_sending();
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_TRUE(que.ready_sending());
-        }
-        // receiving
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_TRUE(que.connect());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_TRUE(que.connect());
-        }
-        ASSERT_TRUE(que.disconnect());
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_FALSE(que.disconnect());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_TRUE(que.connect());
-            ASSERT_TRUE(que.disconnect());
-        }
-    }
-}
-
-TEST(Queue, prod_cons_1v1_unicast) {
-    test_sr(elems_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast>{}, 1, 1, "ssu");
-    test_sr(elems_t<ipc::relat::single, ipc::relat::multi , ipc::trans::unicast>{}, 1, 1, "smu");
-    test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::unicast>{}, 1, 1, "mmu");
-}
-
-TEST(Queue, prod_cons_1v1_broadcast) {
-    test_sr(elems_t<ipc::relat::single, ipc::relat::multi , ipc::trans::broadcast>{}, 1, 1, "smb");
-    test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::broadcast>{}, 1, 1, "mmb");
-}
-
-TEST(Queue, prod_cons_1vN_unicast) {
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::single, ipc::relat::multi , ipc::trans::unicast>{}, 1, i, "smu");
-    }
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::unicast>{}, 1, i, "mmu");
-    }
-}
-
-TEST(Queue, prod_cons_1vN_broadcast) {
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::single, ipc::relat::multi , ipc::trans::broadcast>{}, 1, i, "smb");
-    }
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::broadcast>{}, 1, i, "mmb");
-    }
-}
-
-TEST(Queue, prod_cons_NvN_unicast) {
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::unicast>{}, 1, i, "mmu");
-    }
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::unicast>{}, i, 1, "mmu");
-    }
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::unicast>{}, i, i, "mmu");
-    }
-}
-
-TEST(Queue, prod_cons_NvN_broadcast) {
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::broadcast>{}, 1, i, "mmb");
-    }
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::broadcast>{}, i, 1, "mmb");
-    }
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::broadcast>{}, i, i, "mmb");
-    }
-}
diff --git a/test/test_shm.cpp b/test/test_shm.cpp
deleted file mode 100755
index 3272dcc6..00000000
--- a/test/test_shm.cpp
+++ /dev/null
@@ -1,102 +0,0 @@
-#include <cstring>
-#include <cstdint>
-#include <thread>
-
-#include "libipc/shm.h"
-#include "test.h"
-
-using namespace ipc::shm;
-
-namespace {
-
-TEST(SHM, acquire) {
-    handle shm_hd;
-    EXPECT_FALSE(shm_hd.valid());
-
-    EXPECT_TRUE(shm_hd.acquire("my-test-1", 1024));
-    EXPECT_TRUE(shm_hd.valid());
-    EXPECT_STREQ(shm_hd.name(), "my-test-1");
-
-    EXPECT_TRUE(shm_hd.acquire("my-test-2", 2048));
-    EXPECT_TRUE(shm_hd.valid());
-    EXPECT_STREQ(shm_hd.name(), "my-test-2");
-
-    EXPECT_TRUE(shm_hd.acquire("my-test-3", 4096));
-    EXPECT_TRUE(shm_hd.valid());
-    EXPECT_STREQ(shm_hd.name(), "my-test-3");
-}
-
-TEST(SHM, release) {
-    handle shm_hd;
-    EXPECT_FALSE(shm_hd.valid());
-    shm_hd.release();
-    EXPECT_FALSE(shm_hd.valid());
-    EXPECT_TRUE(shm_hd.acquire("release-test-1", 512));
-    EXPECT_TRUE(shm_hd.valid());
-    shm_hd.release();
-    EXPECT_FALSE(shm_hd.valid());
-}
-
-TEST(SHM, get) {
-    handle shm_hd;
-    EXPECT_TRUE(shm_hd.get() == nullptr);
-    EXPECT_TRUE(shm_hd.acquire("get-test", 2048));
-
-    auto mem = shm_hd.get();
-    EXPECT_TRUE(mem != nullptr);
-    EXPECT_TRUE(mem == shm_hd.get());
-
-    std::uint8_t buf[1024] = {};
-    EXPECT_TRUE(memcmp(mem, buf, sizeof(buf)) == 0);
-
-    handle shm_other(shm_hd.name(), shm_hd.size());
-    EXPECT_TRUE(shm_other.get() != shm_hd.get());
-}
-
-TEST(SHM, hello) {
-    handle shm_hd;
-    EXPECT_TRUE(shm_hd.acquire("hello-test", 128));
-    auto mem = shm_hd.get();
-    EXPECT_TRUE(mem != nullptr);
-
-    constexpr char hello[] = "hello!";
-    std::memcpy(mem, hello, sizeof(hello));
-    EXPECT_STREQ((char const *)shm_hd.get(), hello);
-
-    shm_hd.release();
-    EXPECT_TRUE(shm_hd.get() == nullptr);
-    EXPECT_TRUE(shm_hd.acquire("hello-test", 1024));
-
-    mem = shm_hd.get();
-    EXPECT_TRUE(mem != nullptr);
-    std::uint8_t buf[1024] = {};
-    EXPECT_TRUE(memcmp(mem, buf, sizeof(buf)) == 0);
-
-    std::memcpy(mem, hello, sizeof(hello));
-    EXPECT_STREQ((char const *)shm_hd.get(), hello);
-}
-
-TEST(SHM, mt) {
-    handle shm_hd;
-    EXPECT_TRUE(shm_hd.acquire("mt-test", 256));
-    constexpr char hello[] = "hello!";
-    std::memcpy(shm_hd.get(), hello, sizeof(hello));
-
-    std::thread {
-        [&shm_hd] {
-            handle shm_mt(shm_hd.name(), shm_hd.size());
-            shm_hd.release();
-            constexpr char hello[] = "hello!";
-            EXPECT_STREQ((char const *)shm_mt.get(), hello);
-        }
-    }.join();
-
-    EXPECT_TRUE(shm_hd.get() == nullptr);
-    EXPECT_FALSE(shm_hd.valid());
-
-    EXPECT_TRUE(shm_hd.acquire("mt-test", 1024));
-    std::uint8_t buf[1024] = {};
-    EXPECT_TRUE(memcmp(shm_hd.get(), buf, sizeof(buf)) == 0);
-}
-
-} // internal-linkage
diff --git a/test/test_sync.cpp b/test/test_sync.cpp
deleted file mode 100644
index 4cb82e68..00000000
--- a/test/test_sync.cpp
+++ /dev/null
@@ -1,208 +0,0 @@
-
-#include <thread>
-#include <iostream>
-#include <mutex>
-#include <chrono>
-#include <deque>
-#include <array>
-#include <cstdio>
-
-#include "test.h"
-
-#include "libipc/platform/detail.h"
-#if defined(IPC_OS_LINUX_)
-#include <pthread.h>
-#include <time.h>
-
-TEST(PThread, Robust) {
-    pthread_mutexattr_t ma;
-    pthread_mutexattr_init(&ma);
-    pthread_mutexattr_setpshared(&ma, PTHREAD_PROCESS_SHARED);
-    pthread_mutexattr_setrobust(&ma, PTHREAD_MUTEX_ROBUST);
-    pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
-    pthread_mutex_init(&mutex, &ma);
-
-    std::thread{[&mutex] {
-        pthread_mutex_lock(&mutex);
-        // pthread_mutex_unlock(&mutex);
-    }}.join();
-
-    struct timespec tout;
-    clock_gettime(CLOCK_REALTIME, &tout);
-    int r = pthread_mutex_timedlock(&mutex, &tout);
-    EXPECT_EQ(r, EOWNERDEAD);
-
-    pthread_mutex_consistent(&mutex);
-    pthread_mutex_unlock(&mutex);
-    pthread_mutex_destroy(&mutex);
-}
-#elif defined(IPC_OS_WINDOWS_)
-#include <Windows.h>
-#include <tchar.h>
-
-TEST(PThread, Robust) {
-    HANDLE lock = CreateMutex(NULL, FALSE, _T("test-robust"));
-    std::thread{[] {
-        HANDLE lock = CreateMutex(NULL, FALSE, _T("test-robust"));
-        WaitForSingleObject(lock, 0);
-    }}.join();
-
-    DWORD r = WaitForSingleObject(lock, 0);
-    EXPECT_EQ(r, WAIT_ABANDONED);
-
-    CloseHandle(lock);
-}
-#endif // OS
-
-#include "libipc/mutex.h"
-
-TEST(Sync, Mutex) {
-    ipc::sync::mutex lock;
-    EXPECT_TRUE(lock.open("test-mutex-robust"));
-    std::thread{[] {
-        ipc::sync::mutex lock {"test-mutex-robust"};
-        EXPECT_TRUE(lock.valid());
-        EXPECT_TRUE(lock.lock());
-    }}.join();
-
-    EXPECT_THROW(lock.try_lock(), std::system_error);
-
-    // int i = 0;
-    // EXPECT_TRUE(lock.lock());
-    // i = 100;
-    // auto t2 = std::thread{[&i] {
-    //     ipc::sync::mutex lock {"test-mutex-robust"};
-    //     EXPECT_TRUE(lock.valid());
-    //     EXPECT_FALSE(lock.try_lock());
-    //     EXPECT_TRUE(lock.lock());
-    //     i += i;
-    //     EXPECT_TRUE(lock.unlock());
-    // }};
-    // std::this_thread::sleep_for(std::chrono::seconds(1));
-    // EXPECT_EQ(i, 100);
-    // EXPECT_TRUE(lock.unlock());
-    // t2.join();
-    // EXPECT_EQ(i, 200);
-}
-
-#include "libipc/semaphore.h"
-
-TEST(Sync, Semaphore) {
-    ipc::sync::semaphore sem;
-    EXPECT_TRUE(sem.open("test-sem"));
-    std::thread{[] {
-        ipc::sync::semaphore sem {"test-sem"};
-        EXPECT_TRUE(sem.post(1000));
-    }}.join();
-
-    for (int i = 0; i < 1000; ++i) {
-        EXPECT_TRUE(sem.wait(0));
-    }
-    EXPECT_FALSE(sem.wait(0));
-}
-
-#include "libipc/condition.h"
-
-TEST(Sync, Condition) {
-    ipc::sync::condition cond;
-    EXPECT_TRUE(cond.open("test-cond"));
-    ipc::sync::mutex lock;
-    EXPECT_TRUE(lock.open("test-mutex"));
-    std::deque<int> que;
-
-    auto job = [&que](int num) {
-        ipc::sync::condition cond {"test-cond"};
-        ipc::sync::mutex lock {"test-mutex"};
-        for (int i = 0; i < 10; ++i) {
-            int val = 0;
-            {
-                std::lock_guard<ipc::sync::mutex> guard {lock};
-                while (que.empty()) {
-                    ASSERT_TRUE(cond.wait(lock));
-                }
-                val = que.front();
-                que.pop_front();
-            }
-            EXPECT_NE(val, 0);
-            std::printf("test-cond-%d: %d\n", num, val);
-        }
-        for (;;) {
-            int val = 0;
-            {
-                std::lock_guard<ipc::sync::mutex> guard {lock};
-                while (que.empty()) {
-                    EXPECT_TRUE(cond.wait(lock, 1000));
-                }
-                val = que.front();
-                que.pop_front();
-            }
-            if (val == 0) {
-                std::printf("test-cond-%d: exit.\n", num);
-                return;
-            }
-            std::printf("test-cond-%d: %d\n", num, val);
-        }
-    };
-    std::array<std::thread, 10> test_conds;
-    for (int i = 0; i < (int)test_conds.size(); ++i) {
-        test_conds[i] = std::thread{job, i};
-    }
-
-    for (int i = 1; i < 100; ++i) {
-        {
-            std::lock_guard<ipc::sync::mutex> guard {lock};
-            que.push_back(i);
-            ASSERT_TRUE(cond.notify(lock));
-        }
-        std::this_thread::sleep_for(std::chrono::milliseconds(20));
-    }
-    for (int i = 1; i < 100; ++i) {
-        {
-            std::lock_guard<ipc::sync::mutex> guard {lock};
-            que.push_back(i);
-            ASSERT_TRUE(cond.broadcast(lock));
-        }
-        std::this_thread::sleep_for(std::chrono::milliseconds(20));
-    }
-    {
-        std::lock_guard<ipc::sync::mutex> guard {lock};
-        for (int i = 0; i < (int)test_conds.size(); ++i) {
-            que.push_back(0);
-        }
-        ASSERT_TRUE(cond.broadcast(lock));
-    }
-
-    for (auto &t : test_conds) t.join();
-}
-
-/**
- * https://stackoverflow.com/questions/51730660/is-this-a-bug-in-glibc-pthread
-*/
-TEST(Sync, ConditionRobust) {
-    printf("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1\n");
-    ipc::sync::condition cond {"test-cond"};
-    printf("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 2\n");
-    ipc::sync::mutex lock {"test-mutex"};
-    printf("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 3\n");
-    ASSERT_TRUE(lock.lock());
-    std::thread unlock {[] {
-        printf("WWWWWWWWWWWWWWWWWWWWWWWWWWWWWW 1\n");
-        ipc::sync::condition cond {"test-cond"};
-        printf("WWWWWWWWWWWWWWWWWWWWWWWWWWWWWW 2\n");
-        ipc::sync::mutex lock {"test-mutex"};
-        printf("WWWWWWWWWWWWWWWWWWWWWWWWWWWWWW 3\n");
-        {
-            std::lock_guard<ipc::sync::mutex> guard {lock};
-        }
-        std::this_thread::sleep_for(std::chrono::seconds(1));
-        printf("WWWWWWWWWWWWWWWWWWWWWWWWWWWWWW 4\n");
-        ASSERT_TRUE(cond.broadcast(lock));
-        printf("WWWWWWWWWWWWWWWWWWWWWWWWWWWWWW 5\n");
-    }};
-    printf("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 4\n");
-    ASSERT_TRUE(cond.wait(lock));
-    printf("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 5\n");
-    ASSERT_TRUE(lock.unlock());
-    printf("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 6\n");
-    unlock.join();
-}
\ No newline at end of file
diff --git a/test/test_thread_utility.cpp b/test/test_thread_utility.cpp
deleted file mode 100755
index 02dd0c23..00000000
--- a/test/test_thread_utility.cpp
+++ /dev/null
@@ -1,203 +0,0 @@
-#include <type_traits>
-#include <iostream>
-#include <shared_mutex> // std::shared_lock
-#include <utility>
-#include <thread>
-#include <future>       // std::async
-#include <atomic>
-#include <string>       // std::string
-
-#include "capo/spin_lock.hpp"
-#include "capo/type_name.hpp"
-
-#include "libipc/rw_lock.h"
-
-#include "test.h"
-#include "thread_pool.h"
-
-namespace {
-
-constexpr int LoopCount = 100000;
-constexpr int ThreadMax = 8;
-
-template <typename T>
-constexpr T acc(T b, T e) noexcept {
-    return (e + b) * (e - b + 1) / 2;
-}
-
-template <typename Mutex>
-struct lc_wrapper : Mutex {
-    void lock_shared  () { Mutex::lock  (); }
-    void unlock_shared() { Mutex::unlock(); }
-};
-
-template <typename Lc, int Loops = LoopCount>
-void benchmark_lc(int w, int r, char const * message) {
-    ipc_ut::sender().start(static_cast<std::size_t>(w));
-    ipc_ut::reader().start(static_cast<std::size_t>(r));
-    ipc_ut::test_stopwatch sw;
-
-    std::uint64_t data = 0;
-    std::uint64_t sum  = acc<std::uint64_t>(1, Loops) * w;
-    Lc lc;
-
-    for (int k = 0; k < r; ++k) {
-        ipc_ut::reader() << [sum, &lc, &data] {
-            while (1) {
-                {
-                    std::shared_lock<Lc> guard { lc };
-                    if (data == sum) break;
-                }
-                std::this_thread::yield();
-            }
-        };
-    }
-
-    for (int k = 0; k < w; ++k) {
-        ipc_ut::sender() << [&sw, &lc, &data] {
-            sw.start();
-            for (int i = 1; i <= Loops; ++i) {
-                {
-                    std::lock_guard<Lc> guard { lc };
-                    data += i;
-                }
-                std::this_thread::yield();
-            }
-        };
-    }
-
-    ipc_ut::sender().wait_for_done();
-    sw.print_elapsed(w, r, Loops, message);
-    ipc_ut::reader().wait_for_done();
-}
-
-void test_lock_performance(int w, int r) {
-    std::cout << "test_lock_performance: [" << w << "-" << r << "]" << std::endl;
-    benchmark_lc<ipc::rw_lock               >(w, r, "ipc::rw_lock");
-    benchmark_lc<lc_wrapper< ipc::spin_lock>>(w, r, "ipc::spin_lock");
-    benchmark_lc<lc_wrapper<capo::spin_lock>>(w, r, "capo::spin_lock");
-    benchmark_lc<lc_wrapper<std::mutex>     >(w, r, "std::mutex");
-    // benchmark_lc<std::shared_mutex          >(w, r, "std::shared_mutex");
-}
-
-} // internal-linkage
-
-//TEST(Thread, rw_lock) {
-//    for (int i = 1; i <= ThreadMax; ++i) test_lock_performance(i, 0);
-//    for (int i = 1; i <= ThreadMax; ++i) test_lock_performance(1, i);
-//    for (int i = 2; i <= ThreadMax; ++i) test_lock_performance(i, i);
-//}
-
-#if 0 // disable ipc::tls
-TEST(Thread, tls_main_thread) {
-    ipc::tls::pointer<int> p;
-    EXPECT_FALSE(p);
-    EXPECT_NE(p.create(123), nullptr);
-    EXPECT_EQ(*p, 123);
-}
-
-namespace {
-
-struct Foo {
-    std::atomic<int> * px_;
-    Foo(std::atomic<int> * px) : px_(px) {}
-    ~Foo() {
-        px_->fetch_add(1, std::memory_order_relaxed);
-    }
-};
-
-} // namespace
-
-TEST(Thread, tls_create_once) {
-    std::atomic<int> x { 0 };
-    Foo { &x };
-    EXPECT_EQ(x, 1);
-    {
-        ipc::tls::pointer<Foo> foo;
-        EXPECT_NE(foo.create(&x), nullptr);
-        EXPECT_EQ(x, 1);
-
-        std::thread {[&foo, &x] {
-            auto foo1 = foo.create_once(&x);
-            auto foo2 = foo.create_once(&x);
-            EXPECT_EQ(foo1, foo2);
-        }}.join();
-        EXPECT_EQ(x, 2);
-    }
-    EXPECT_EQ(x, 3);
-}
-
-TEST(Thread, tls_multi_thread) {
-    std::atomic<int> x { 0 };
-    {
-        ipc::tls::pointer<Foo> foo; // no create
-        EXPECT_EQ(x, 0);
-
-        ipc_ut::thread_pool pool { 10 };
-        for (int i = 0; i < 1000; ++i) {
-          pool << [&foo, &x] {
-            // foo.create_once(&x);
-            std::this_thread::sleep_for(std::chrono::milliseconds(1));
-          };
-        }
-        pool.wait_for_done();
-        EXPECT_EQ(x, 0); // thread_pool hasn't destructed.
-    }
-    // EXPECT_EQ(x, 10);
-}
-
-namespace {
-
-template <typename Tls, typename T>
-void benchmark_tls(char const * message) {
-    ipc_ut::thread_pool pool { static_cast<std::size_t>(ThreadMax) };
-    ipc_ut::test_stopwatch sw;
-    pool.wait_for_started();
-
-    for (int k = 0; k < ThreadMax; ++k) {
-        pool << [&sw] {
-            sw.start();
-            for (int i = 0; i < LoopCount * 10; ++i) {
-                *Tls::template get<T>() = i;
-            }
-        };
-    }
-
-    pool.wait_for_done();
-    sw.print_elapsed(ThreadMax, LoopCount * 10, message);
-}
-
-struct ipc_tls {
-    template <typename T>
-    static T * get() {
-        static ipc::tls::pointer<T> p;
-        return p.create_once();
-    }
-};
-
-struct std_tls {
-    template <typename T>
-    static T * get() {
-        thread_local T p;
-        return &p;
-    }
-};
-
-struct Str {
-    std::string str_;
-
-    Str & operator=(int i) {
-        str_ = std::to_string(i);
-        return *this;
-    }
-};
-
-} // internal-linkage
-
-TEST(Thread, tls_benchmark) {
-    benchmark_tls<std_tls, int>("std_tls: int");
-    benchmark_tls<ipc_tls, int>("ipc_tls: int");
-    benchmark_tls<std_tls, Str>("std_tls: Str");
-    benchmark_tls<ipc_tls, Str>("ipc_tls: Str");
-}
-#endif
\ No newline at end of file
diff --git a/test/test_waiter.cpp b/test/test_waiter.cpp
deleted file mode 100755
index 727cca0c..00000000
--- a/test/test_waiter.cpp
+++ /dev/null
@@ -1,68 +0,0 @@
-#include <thread>
-#include <iostream>
-
-#include "libipc/waiter.h"
-#include "test.h"
-
-namespace {
-
-TEST(Waiter, broadcast) {
-    for (int i = 0; i < 10; ++i) {
-        ipc::detail::waiter waiter;
-        std::thread ts[10];
-
-        int k = 0;
-        for (auto& t : ts) {
-            t = std::thread([&k] {
-                ipc::detail::waiter waiter {"test-ipc-waiter"};
-                EXPECT_TRUE(waiter.valid());
-                for (int i = 0; i < 9; ++i) {
-                    while (!waiter.wait_if([&k, &i] { return k == i; })) ;
-                }
-            });
-        }
-
-        EXPECT_TRUE(waiter.open("test-ipc-waiter"));
-        std::cout << "waiting for broadcast...\n";
-        for (k = 1; k < 10; ++k) {
-            std::cout << "broadcast: " << k << "\n";
-            ASSERT_TRUE(waiter.broadcast());
-            std::this_thread::sleep_for(std::chrono::milliseconds(100));
-        }
-        for (auto& t : ts) t.join();
-        std::cout << "quit... " << i << "\n";
-    }
-}
-
-TEST(Waiter, quit_waiting) {
-    ipc::detail::waiter waiter;
-    EXPECT_TRUE(waiter.open("test-ipc-waiter"));
-
-    std::thread t1 {
-        [&waiter] {
-            EXPECT_TRUE(waiter.wait_if([] { return true; }));
-        }
-    };
-
-    bool quit = false;
-    std::thread t2 {
-        [&quit] {
-            ipc::detail::waiter waiter {"test-ipc-waiter"};
-            EXPECT_TRUE(waiter.wait_if([&quit] { return !quit; }));
-        }
-    };
-
-    std::this_thread::sleep_for(std::chrono::milliseconds(100));
-    EXPECT_TRUE(waiter.quit_waiting());
-    t1.join();
-    ASSERT_TRUE(t2.joinable());
-
-    EXPECT_TRUE(waiter.open("test-ipc-waiter"));
-    std::cout << "nofify quit...\n";
-    quit = true;
-    EXPECT_TRUE(waiter.notify());
-    t2.join();
-    std::cout << "quit... \n";
-}
-
-} // internal-linkage
diff --git a/test/thread_pool.h b/test/thread_pool.h
deleted file mode 100755
index 03b7e8f6..00000000
--- a/test/thread_pool.h
+++ /dev/null
@@ -1,123 +0,0 @@
-#pragma once
-
-#include <thread>             // std::thread
-#include <mutex>              // std::mutex
-#include <condition_variable> // std::condition_variable
-#include <deque>              // std::deque
-#include <functional>         // std::function
-#include <utility>            // std::forward, std::move
-#include <cstddef>            // std::size_t
-#include <cassert>            // assert
-
-#include "capo/scope_guard.hpp"
-
-namespace ipc_ut {
-
-class thread_pool final {
-
-  std::deque<std::thread> workers_;
-  std::deque<std::function<void()>> jobs_;
-
-  std::mutex lock_;
-  std::condition_variable cv_jobs_;
-  std::condition_variable cv_empty_;
-
-  std::size_t waiting_cnt_ = 0;
-  bool quit_ = false;
-
-  static void proc(thread_pool * pool) {
-    assert(pool != nullptr);
-    std::function<void()> job;
-    for (;;) {
-      {
-        std::unique_lock<std::mutex> guard { pool->lock_ };
-        if (pool->quit_) return;
-        if (pool->jobs_.empty()) {
-          pool->waiting_cnt_ += 1;
-          CAPO_SCOPE_GUARD_ = [pool] {
-              pool->waiting_cnt_ -= 1;
-          };
-
-          if (pool->waiting_cnt_ == pool->workers_.size()) {
-            pool->cv_empty_.notify_all();
-          }
-          assert(pool->waiting_cnt_ <= pool->workers_.size());
-          do {
-            pool->cv_jobs_.wait(guard);
-            if (pool->quit_) return;
-          } while (pool->jobs_.empty());
-        }
-        assert(!pool->jobs_.empty());
-        job = std::move(pool->jobs_.front());
-        pool->jobs_.pop_front();
-      }
-      if (job) job();
-    }
-  }
-
-public:
-  thread_pool() = default;
-
-  ~thread_pool() {
-    {
-      std::lock_guard<std::mutex> guard { lock_ };
-      static_cast<void>(guard);
-      quit_ = true;
-    }
-    cv_jobs_.notify_all();
-    cv_empty_.notify_all();
-    for (auto & trd : workers_) trd.join();
-  }
-
-  explicit thread_pool(std::size_t n) : thread_pool() {
-    start(n);
-  }
-
-  void start(std::size_t n) {
-    std::unique_lock<std::mutex> guard { lock_ };
-    if (n <= workers_.size()) return;
-    for (std::size_t i = workers_.size(); i < n; ++i) {
-      workers_.push_back(std::thread { &thread_pool::proc, this });
-    }
-  }
-
-  std::size_t size() const noexcept {
-    return workers_.size();
-  }
-
-  std::size_t jobs_size() const noexcept {
-    return jobs_.size();
-  }
-
-  void wait_for_started() {
-    std::unique_lock<std::mutex> guard { lock_ };
-    if (quit_) return;
-    while (!workers_.empty() && (waiting_cnt_ != workers_.size())) {
-      cv_empty_.wait(guard);
-      if (quit_) return;
-    }
-  }
-
-  void wait_for_done() {
-    std::unique_lock<std::mutex> guard { lock_ };
-    if (quit_) return;
-    while (!jobs_.empty() || (waiting_cnt_ != workers_.size())) {
-      assert(waiting_cnt_ <= workers_.size());
-      cv_empty_.wait(guard);
-      if (quit_) return;
-    }
-  }
-
-  template <typename F>
-  thread_pool & operator<<(F && job) {
-    {
-      std::lock_guard<std::mutex> guard { lock_ };
-      static_cast<void>(guard);
-      jobs_.emplace_back(std::forward<F>(job));
-    }
-    cv_jobs_.notify_one();
-    return *this;
-  }
-};
-
-} // namespace ipc_ut
\ No newline at end of file

From c8058022ba8ef7bb9b64906f3f966820df5885fc Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Feb 2022 17:14:59 +0800
Subject: [PATCH 006/272] =?UTF-8?q?=E8=B0=83=E6=95=B4github=20ci?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .github/workflows/c-cpp.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index c5542c86..46b4d84a 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -2,9 +2,9 @@ name: C/C++ CI
 
 on:
   push:
-    branches: [ master, develop, issue-* ]
+    branches: [ master, develop, refactoring, issue-* ]
   pull_request:
-    branches: [ master, develop ]
+    branches: [ master, develop, refactoring ]
 
 jobs:
   build:

From 23b7780485fa6aabc88b17225e69abb0d4fc1dc8 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Feb 2022 18:03:30 +0800
Subject: [PATCH 007/272] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E9=83=A8=E5=88=86?=
 =?UTF-8?q?=E6=9C=89=E7=94=A8=E7=9A=84=E5=B0=8F=E7=BB=84=E4=BB=B6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 include/libipc/def.h           |  5 ++-
 src/libipc/utility/construct.h | 35 ++++++++++++++++
 src/libipc/utility/pimpl.h     | 73 ++++++++++++++++++++++++++++++++++
 test/test_src_utility.cpp      | 68 +++++++++++++++++++++++++++++++
 4 files changed, 180 insertions(+), 1 deletion(-)
 create mode 100644 src/libipc/utility/construct.h
 create mode 100644 src/libipc/utility/pimpl.h
 create mode 100644 test/test_src_utility.cpp

diff --git a/include/libipc/def.h b/include/libipc/def.h
index b3ebd6f7..de9a4965 100755
--- a/include/libipc/def.h
+++ b/include/libipc/def.h
@@ -9,7 +9,10 @@
 #include <cstddef>
 #include <cstdint>
 
-#define LIBIPC_NAMESPACE_BEG_ namespace ipc {
+#if !defined(LIBIPC_NAMESPACE)
+# define LIBIPC_NAMESPACE ipc
+#endif
+#define LIBIPC_NAMESPACE_BEG_ namespace LIBIPC_NAMESPACE {
 #define LIBIPC_NAMESPACE_END_ }
 
 LIBIPC_NAMESPACE_BEG_
diff --git a/src/libipc/utility/construct.h b/src/libipc/utility/construct.h
new file mode 100644
index 00000000..1cf7f3ad
--- /dev/null
+++ b/src/libipc/utility/construct.h
@@ -0,0 +1,35 @@
+/**
+ * @file src/construct.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Construct an object from a memory buffer
+ * @date 2022-02-27
+ */
+#pragma once
+
+#include <new>          // placement-new
+#include <type_traits>  // std::enable_if_t
+#include <utility>      // std::forward
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+template <typename T, typename... A>
+auto construct(void *p, A &&... args)
+  -> std::enable_if_t<::std::is_constructible<T, A...>::value, T *> {
+  return ::new (p) T(std::forward<A>(args)...);
+}
+
+template <typename T, typename... A>
+auto construct(void *p, A &&... args)
+  -> std::enable_if_t<!::std::is_constructible<T, A...>::value, T *> {
+  return ::new (p) T{std::forward<A>(args)...};
+}
+
+template <typename T>
+void *destroy(T *p) noexcept {
+  p->~T();
+  return p;
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/utility/pimpl.h b/src/libipc/utility/pimpl.h
new file mode 100644
index 00000000..596fe947
--- /dev/null
+++ b/src/libipc/utility/pimpl.h
@@ -0,0 +1,73 @@
+/**
+ * @file src/pimpl.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Pointer To Implementation (pImpl) idiom
+ * @date 2022-02-27
+ */
+#pragma once
+
+#include <utility>
+#include <type_traits>
+#include <cstdint>
+
+#include "libipc/utility/construct.h"
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+namespace pimpl {
+
+template <typename T, typename R = T *>
+struct is_comfortable {
+  enum : bool {
+    value = (sizeof(T) <= sizeof(R)) && (alignof(T) <= alignof(R))
+  };
+};
+
+template <typename T, typename... A>
+auto make(A &&... args) -> std::enable_if_t<is_comfortable<T>::value, T *> {
+  T *buf {};
+  // construct an object using memory of a pointer
+  construct<T>(&buf, std::forward<A>(args)...);
+  return buf;
+}
+
+template <typename T>
+auto get(T * const (& p)) noexcept -> std::enable_if_t<is_comfortable<T>::value, T *> {
+  return reinterpret_cast<T*>(&const_cast<char &>(reinterpret_cast<char const &>(p)));
+}
+
+template <typename T>
+auto clear(T *p) noexcept -> std::enable_if_t<is_comfortable<T>::value> {
+  if (p != nullptr) destroy(get(p));
+}
+
+template <typename T, typename... A>
+auto make(A &&... args) -> std::enable_if_t<!is_comfortable<T>::value, T *> {
+  return new T{std::forward<A>(args)...};
+}
+
+template <typename T>
+auto get(T * const (& p)) noexcept -> std::enable_if_t<!is_comfortable<T>::value, T *> {
+  return p;
+}
+
+template <typename T>
+auto clear(T *p) noexcept -> std::enable_if_t<!is_comfortable<T>::value> {
+  if (p != nullptr) delete p;
+}
+
+template <typename T>
+class Obj {
+ public:
+  template <typename... A>
+  static T *make(A &&... args) {
+    return pimpl::make<T>(std::forward<A>(args)...);
+  }
+
+  void clear() noexcept {
+    pimpl::clear(static_cast<T *>(const_cast<Obj *>(this)));
+  }
+};
+
+} // namespace pimpl
+LIBIPC_NAMESPACE_END_
diff --git a/test/test_src_utility.cpp b/test/test_src_utility.cpp
new file mode 100644
index 00000000..4d6e7d8b
--- /dev/null
+++ b/test/test_src_utility.cpp
@@ -0,0 +1,68 @@
+
+#include <type_traits>  // std::aligned_storage_t
+#include <cstdint>
+
+#include "gtest/gtest.h"
+
+#include "libipc/utility/construct.h"
+#include "libipc/utility/pimpl.h"
+
+TEST(utility, construct) {
+  struct Foo {
+    int a_;
+    short b_;
+    char c_;
+  };
+  std::aligned_storage_t<sizeof(Foo)> foo;
+  Foo *pfoo = ipc::construct<Foo>(&foo, 123, short{321}, '1');
+  EXPECT_EQ(pfoo->a_, 123);
+  EXPECT_EQ(pfoo->b_, 321);
+  EXPECT_EQ(pfoo->c_, '1');
+
+  struct Bar : Foo {
+    Bar(int a, short b, char c)
+        : Foo{a, b, c} {}
+  };
+  std::aligned_storage_t<sizeof(Bar)> bar;
+  Bar *pbar = ipc::construct<Bar>(&bar, 123, short(321), '1');
+  EXPECT_EQ(pbar->a_, 123);
+  EXPECT_EQ(pbar->b_, 321);
+  EXPECT_EQ(pbar->c_, '1');
+}
+
+namespace {
+
+struct Foo : ipc::pimpl::Obj<Foo> {
+  int *pi_;
+  Foo(int *pi) : pi_(pi) {}
+};
+
+struct Bar : ipc::pimpl::Obj<Bar> {
+  int *pi_;
+  int *pj_;
+  Bar(int *pi, int *pj) : pi_(pi), pj_(pj) {}
+};
+
+} // namespace
+
+TEST(utility, pimpl_is_comfortable) {
+  EXPECT_TRUE ((ipc::pimpl::is_comfortable<std::int32_t, std::int64_t>::value));
+  EXPECT_TRUE ((ipc::pimpl::is_comfortable<std::int64_t, std::int64_t>::value));
+  EXPECT_FALSE((ipc::pimpl::is_comfortable<std::int64_t, std::int32_t>::value));
+
+  EXPECT_TRUE ((ipc::pimpl::is_comfortable<Foo>::value));
+  EXPECT_FALSE((ipc::pimpl::is_comfortable<Bar>::value));
+}
+
+TEST(utility, pimpl_inherit) {
+  int i = 123;
+  Foo *pfoo = Foo::make(&i);
+  EXPECT_EQ(ipc::pimpl::get(pfoo)->pi_, &i);
+  pfoo->clear();
+
+  int j = 321;
+  Bar *pbar = Bar::make(&i, &j);
+  EXPECT_EQ(ipc::pimpl::get(pbar)->pi_, &i);
+  EXPECT_EQ(ipc::pimpl::get(pbar)->pj_, &j);
+  pbar->clear();
+}

From c54e052838c3663fdbe5c0fd72e2bdfc654c9344 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Feb 2022 18:05:25 +0800
Subject: [PATCH 008/272] =?UTF-8?q?=E8=B0=83=E6=95=B4ut=E6=96=87=E4=BB=B6?=
 =?UTF-8?q?=E5=91=BD=E5=90=8D?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 test/{test_src_utility.cpp => test_utility.cpp} | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename test/{test_src_utility.cpp => test_utility.cpp} (100%)

diff --git a/test/test_src_utility.cpp b/test/test_utility.cpp
similarity index 100%
rename from test/test_src_utility.cpp
rename to test/test_utility.cpp

From 21f34bd99c0403b34ae9301e309ef3430682827e Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Feb 2022 18:30:42 +0800
Subject: [PATCH 009/272] =?UTF-8?q?=E5=9C=A8=E5=8F=AF=E8=83=BD=E7=9A=84?=
 =?UTF-8?q?=E6=83=85=E5=86=B5=E4=B8=8B=E4=BD=BF=E7=94=A8std=E7=9A=84constr?=
 =?UTF-8?q?uct=5Fat/destroy=5Fat?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/libipc/utility/construct.h | 33 +++++++++++++++++++++++++++++++++
 test/test_utility.cpp          | 17 +++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/src/libipc/utility/construct.h b/src/libipc/utility/construct.h
index 1cf7f3ad..ad21ffd5 100644
--- a/src/libipc/utility/construct.h
+++ b/src/libipc/utility/construct.h
@@ -9,15 +9,27 @@
 #include <new>          // placement-new
 #include <type_traits>  // std::enable_if_t
 #include <utility>      // std::forward
+#include <memory>       // std::construct_at, std::destroy_at, std::addressof
+#include <cstddef>
 
 #include "libipc/def.h"
+#include "libipc/detect_plat.h"
 
 LIBIPC_NAMESPACE_BEG_
 
+/**
+ * @brief Creates an object at a given address, like 'construct_at' in c++20
+ * @see https://en.cppreference.com/w/cpp/memory/construct_at
+*/
+
 template <typename T, typename... A>
 auto construct(void *p, A &&... args)
   -> std::enable_if_t<::std::is_constructible<T, A...>::value, T *> {
+#if defined(LIBIPC_CPP_20)
+  return std::construct_at(static_cast<T *>(p), std::forward<A>(args)...);
+#else
   return ::new (p) T(std::forward<A>(args)...);
+#endif
 }
 
 template <typename T, typename... A>
@@ -26,9 +38,30 @@ auto construct(void *p, A &&... args)
   return ::new (p) T{std::forward<A>(args)...};
 }
 
+/**
+ * @brief Destroys an object at a given address, like 'destroy_at' in c++17
+ * @see https://en.cppreference.com/w/cpp/memory/destroy_at
+*/
+
 template <typename T>
 void *destroy(T *p) noexcept {
+#if defined(LIBIPC_CPP_17)
+  std::destroy_at(p);
+#else
   p->~T();
+#endif
+  return p;
+}
+
+template <typename T, std::size_t N>
+void *destroy(T (*p)[N]) noexcept {
+#if defined(LIBIPC_CPP_20)
+  std::destroy_at(p);
+#elif defined(LIBIPC_CPP_17)
+  std::destroy(std::begin(*p), std::end(*p));
+#else
+  for (auto &elem : *p) destroy(std::addressof(elem));
+#endif
   return p;
 }
 
diff --git a/test/test_utility.cpp b/test/test_utility.cpp
index 4d6e7d8b..8d3751ea 100644
--- a/test/test_utility.cpp
+++ b/test/test_utility.cpp
@@ -18,16 +18,33 @@ TEST(utility, construct) {
   EXPECT_EQ(pfoo->a_, 123);
   EXPECT_EQ(pfoo->b_, 321);
   EXPECT_EQ(pfoo->c_, '1');
+  ipc::destroy(pfoo);
 
   struct Bar : Foo {
     Bar(int a, short b, char c)
         : Foo{a, b, c} {}
+    ~Bar() { a_ = 0; }
   };
   std::aligned_storage_t<sizeof(Bar)> bar;
   Bar *pbar = ipc::construct<Bar>(&bar, 123, short(321), '1');
   EXPECT_EQ(pbar->a_, 123);
   EXPECT_EQ(pbar->b_, 321);
   EXPECT_EQ(pbar->c_, '1');
+  ipc::destroy(pbar);
+  EXPECT_EQ(pbar->a_, 0);
+
+  std::aligned_storage_t<sizeof(Bar)> bars[3];
+  for (auto &b : bars) {
+    auto pb = ipc::construct<Bar>(&b, 321, short(123), '3');
+    EXPECT_EQ(pb->a_, 321);
+    EXPECT_EQ(pb->b_, 123);
+    EXPECT_EQ(pb->c_, '3');
+  }
+  ipc::destroy(reinterpret_cast<Bar(*)[3]>(&bars));
+  for (auto &b : bars) {
+    auto pb = reinterpret_cast<Bar *>(&b);
+    EXPECT_EQ(pb->a_, 0);
+  }
 }
 
 namespace {

From b30eeaf1f6d72856777d49c702e5ac030b0a7ba9 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Feb 2022 21:01:54 +0800
Subject: [PATCH 010/272] =?UTF-8?q?=E5=BE=AE=E8=B0=83ut?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 test/test_detect_plat.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/test_detect_plat.cpp b/test/test_detect_plat.cpp
index ca62b1ce..001a350e 100644
--- a/test/test_detect_plat.cpp
+++ b/test/test_detect_plat.cpp
@@ -51,10 +51,10 @@ TEST(detect_plat, byte_order) {
 
 TEST(detect_plat, fallthrough) {
   switch (0) {
-  case 1:
+  case 0:
     std::cout << "fallthrough 0\n";
     LIBIPC_FALLTHROUGH;
-  case 0:
+  case 1:
     std::cout << "fallthrough 1\n";
     LIBIPC_FALLTHROUGH;
   default:

From c32615dbdaa1bab83a1f71250fc9ffc866fa6134 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Feb 2022 21:22:43 +0800
Subject: [PATCH 011/272] =?UTF-8?q?=E8=B0=83=E6=95=B4=E4=BB=A3=E7=A0=81?=
 =?UTF-8?q?=E6=A0=BC=E5=BC=8F=E5=92=8C=E6=B3=A8=E9=87=8A?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 include/libipc/spin_lock.h | 74 +++++++++++++++++++-------------------
 1 file changed, 38 insertions(+), 36 deletions(-)

diff --git a/include/libipc/spin_lock.h b/include/libipc/spin_lock.h
index 49c4acd2..1ed94d95 100644
--- a/include/libipc/spin_lock.h
+++ b/include/libipc/spin_lock.h
@@ -16,57 +16,57 @@
 #include "libipc/detect_plat.h"
 #include "libipc/def.h"
 
-////////////////////////////////////////////////////////////////
-/// Gives hint to processor that improves performance of spin-wait loops.
-////////////////////////////////////////////////////////////////
+/**
+ * @brief Gives hint to processor that improves performance of spin-wait loops.
+*/
 
 #pragma push_macro("LIBIPC_LOCK_PAUSE_")
 #undef LIBIPC_LOCK_PAUSE_
 
 #if defined(LIBIPC_CC_MSVC)
 # include <Windows.h>   // YieldProcessor
-/*
- *  @see http://msdn.microsoft.com/en-us/library/windows/desktop/ms687419(v=vs.85).aspx
- *       Not for intel c++ compiler, so ignore http://software.intel.com/en-us/forums/topic/296168
+/**
+ * @brief Not for intel c++ compiler, so ignore http://software.intel.com/en-us/forums/topic/296168
+ * @see http://msdn.microsoft.com/en-us/library/windows/desktop/ms687419(v=vs.85).aspx
 */
 # define LIBIPC_LOCK_PAUSE_() YieldProcessor()
 #elif defined(LIBIPC_CC_GNUC)
 # if defined(LIBIPC_INSTR_X86_64)
-/*
- *  @see Intel(R) 64 and IA-32 Architectures Software Developer's Manual V2
- *       PAUSE-Spin Loop Hint, 4-57
- *       http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.html?wapkw=instruction+set+reference
+/**
+ * @brief Intel(R) 64 and IA-32 Architectures Software Developer's Manual V2
+ *        PAUSE-Spin Loop Hint, 4-57
+ * @see http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.html?wapkw=instruction+set+reference
 */
 #   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__("pause")
 # elif defined(LIBIPC_INSTR_I64)
-/*
- *  @see Intel(R) Itanium(R) Architecture Developer's Manual, Vol.3
- *       hint - Performance Hint, 3:145
- *       http://www.intel.com/content/www/us/en/processors/itanium/itanium-architecture-vol-3-manual.html
+/**
+ * @brief Intel(R) Itanium(R) Architecture Developer's Manual, Vol.3
+ *        hint - Performance Hint, 3:145
+ * @see http://www.intel.com/content/www/us/en/processors/itanium/itanium-architecture-vol-3-manual.html
 */
 #   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__ ("hint @pause")
-#elif defined(LIBIPC_INSTR_ARM)
-/*
- *  @see ARM Architecture Reference Manuals (YIELD)
- *       http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html
+# elif defined(LIBIPC_INSTR_ARM)
+/**
+ * @brief ARM Architecture Reference Manuals (YIELD)
+ * @see http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html
 */
 #   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__ ("yield")
 # endif
 #endif /*compilers*/
 
 #if !defined(LIBIPC_LOCK_PAUSE_)
-/*
- *  Just use a compiler fence, prevent compiler from optimizing loop
+/**
+ * @brief Just use a compiler fence, prevent compiler from optimizing loop
 */
 # define LIBIPC_LOCK_PAUSE_() std::atomic_signal_fence(std::memory_order_seq_cst)
 #endif /*!defined(LIBIPC_LOCK_PAUSE_)*/
 
-////////////////////////////////////////////////////////////////
-/// Yield to other threads
-////////////////////////////////////////////////////////////////
-
 LIBIPC_NAMESPACE_BEG_
 
+/**
+ * @brief Yield to other threads
+*/
+
 template <typename K>
 inline void yield(K &k) noexcept {
   if (k < 4)  { /* Do nothing */ }
@@ -100,38 +100,38 @@ inline void sleep(K &k) {
   });
 }
 
-} // namespace ipc
-
-#pragma pop_macro("LIBIPC_LOCK_PAUSE_")
-
-namespace ipc {
-
+/**
+ * @brief Basic spin lock
+*/
 class spin_lock {
-  std::atomic<unsigned> lc_ { 0 };
+  std::atomic<unsigned> lc_ {0};
 
 public:
   void lock(void) noexcept {
     for (unsigned k = 0;
-      lc_.exchange(1, std::memory_order_acquire);
-      yield(k)) ;
+         lc_.exchange(1, std::memory_order_acquire);
+         yield(k)) ;
   }
   void unlock(void) noexcept {
     lc_.store(0, std::memory_order_release);
   }
 };
 
+/**
+ * @brief Support for shared mode spin lock
+*/
 class rw_lock {
   using lc_ui_t = unsigned;
 
-  std::atomic<lc_ui_t> lc_ { 0 };
+  std::atomic<lc_ui_t> lc_ {0};
 
   enum : lc_ui_t {
     w_mask = (std::numeric_limits<std::make_signed_t<lc_ui_t>>::max)(), // b 0111 1111
-    w_flag = w_mask + 1                                                 // b 1000 0000
+    w_flag = w_mask + 1,                                                // b 1000 0000
   };
 
 public:
-  rw_lock() = default;
+  rw_lock() noexcept = default;
 
   rw_lock(const rw_lock &) = delete;
   rw_lock &operator=(const rw_lock &) = delete;
@@ -177,3 +177,5 @@ class rw_lock {
 };
 
 LIBIPC_NAMESPACE_END_
+
+#pragma pop_macro("LIBIPC_LOCK_PAUSE_")

From 67bdae6fd7902ccb16835b450ba2ea61b3e0dd72 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Feb 2022 23:50:28 +0800
Subject: [PATCH 012/272] =?UTF-8?q?=E4=BF=AE=E6=AD=A3=E4=B8=80=E4=BA=9Bbug?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 CMakeLists.txt               |  2 --
 include/libipc/detect_plat.h |  4 ++--
 test/test_detect_plat.cpp    | 12 ++++++++++++
 3 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1eb24a0a..d90529d5 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,8 +13,6 @@ if(NOT MSVC)
   set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O2")
 endif()
 
-add_definitions(-DLIBIPC_CPP_14 -DLIBIPC_CPP_17)
-
 if (MSVC)
   set(CompilerFlags
       CMAKE_CXX_FLAGS
diff --git a/include/libipc/detect_plat.h b/include/libipc/detect_plat.h
index 196796f7..a90aef27 100644
--- a/include/libipc/detect_plat.h
+++ b/include/libipc/detect_plat.h
@@ -85,7 +85,7 @@
 #if (__cplusplus >= 201703L) && !defined(LIBIPC_CPP_17)
 # define LIBIPC_CPP_17
 #endif
-#if (__cplusplus >= 201402L) && !defined(LIBIPC_CPP_14)
+#if /*(__cplusplus >= 201402L) &&*/ !defined(LIBIPC_CPP_14)
 # define LIBIPC_CPP_14
 #endif
 
@@ -123,7 +123,7 @@
 #if !defined(LIBIPC_UNUSED)
 # if defined(LIBIPC_CC_GNUC)
 #   define LIBIPC_UNUSED __attribute__((__unused__))
-# elif defined(LIBIPC_CC_MSVC_)
+# elif defined(LIBIPC_CC_MSVC)
 #   define LIBIPC_UNUSED __pragma(warning(suppress: 4100 4101 4189))
 # else
 #   define LIBIPC_UNUSED
diff --git a/test/test_detect_plat.cpp b/test/test_detect_plat.cpp
index 001a350e..99ec8a2b 100644
--- a/test/test_detect_plat.cpp
+++ b/test/test_detect_plat.cpp
@@ -36,6 +36,18 @@ TEST(detect_plat, cc) {
 #endif
 }
 
+TEST(detect_plat, cpp) {
+#if defined(LIBIPC_CPP_20)
+  std::cout << "LIBIPC_CPP_20\n";
+#elif defined(LIBIPC_CPP_17)
+  std::cout << "LIBIPC_CPP_17\n";
+#elif defined(LIBIPC_CPP_14)
+  std::cout << "LIBIPC_CPP_14\n";
+#else
+  ASSERT_TRUE(false);
+#endif
+}
+
 TEST(detect_plat, byte_order) {
   auto is_endian_little = [] {
     union {

From 9fc6cca6011b0fa1f219c90399c018cdcf3206c1 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Tue, 1 Mar 2022 10:48:08 +0800
Subject: [PATCH 013/272] =?UTF-8?q?=E5=B0=9D=E8=AF=95=E4=BF=AE=E6=AD=A3gcc?=
 =?UTF-8?q?=E4=B8=8Evc=E5=9C=A8destroy=E6=97=B6=E7=9A=84=E4=B8=8D=E4=B8=80?=
 =?UTF-8?q?=E8=87=B4=E8=A1=8C=E4=B8=BA?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/libipc/utility/construct.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libipc/utility/construct.h b/src/libipc/utility/construct.h
index ad21ffd5..888cdbd6 100644
--- a/src/libipc/utility/construct.h
+++ b/src/libipc/utility/construct.h
@@ -45,7 +45,7 @@ auto construct(void *p, A &&... args)
 
 template <typename T>
 void *destroy(T *p) noexcept {
-#if defined(LIBIPC_CPP_17)
+#if defined(LIBIPC_CPP_17) && !defined(LIBIPC_CC_GNUC)
   std::destroy_at(p);
 #else
   p->~T();
@@ -57,7 +57,7 @@ template <typename T, std::size_t N>
 void *destroy(T (*p)[N]) noexcept {
 #if defined(LIBIPC_CPP_20)
   std::destroy_at(p);
-#elif defined(LIBIPC_CPP_17)
+#elif defined(LIBIPC_CPP_17) && !defined(LIBIPC_CC_GNUC)
   std::destroy(std::begin(*p), std::end(*p));
 #else
   for (auto &elem : *p) destroy(std::addressof(elem));

From 1ff5900a6d197eed89edcceeff9396954ac34ef0 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Tue, 1 Mar 2022 10:59:30 +0800
Subject: [PATCH 014/272] =?UTF-8?q?=E8=B0=83=E6=95=B4ut=EF=BC=9B=E6=B7=BB?=
 =?UTF-8?q?=E5=8A=A0=E6=96=B0utility=E5=B0=8F=E5=B7=A5=E5=85=B7?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/libipc/utility/construct.h |  4 ++--
 src/libipc/utility/countof.h   | 34 ++++++++++++++++++++++++++++++++++
 src/libipc/utility/enum_cast.h | 20 ++++++++++++++++++++
 test/test_utility.cpp          | 17 ++++++++++-------
 4 files changed, 66 insertions(+), 9 deletions(-)
 create mode 100644 src/libipc/utility/countof.h
 create mode 100644 src/libipc/utility/enum_cast.h

diff --git a/src/libipc/utility/construct.h b/src/libipc/utility/construct.h
index 888cdbd6..ad21ffd5 100644
--- a/src/libipc/utility/construct.h
+++ b/src/libipc/utility/construct.h
@@ -45,7 +45,7 @@ auto construct(void *p, A &&... args)
 
 template <typename T>
 void *destroy(T *p) noexcept {
-#if defined(LIBIPC_CPP_17) && !defined(LIBIPC_CC_GNUC)
+#if defined(LIBIPC_CPP_17)
   std::destroy_at(p);
 #else
   p->~T();
@@ -57,7 +57,7 @@ template <typename T, std::size_t N>
 void *destroy(T (*p)[N]) noexcept {
 #if defined(LIBIPC_CPP_20)
   std::destroy_at(p);
-#elif defined(LIBIPC_CPP_17) && !defined(LIBIPC_CC_GNUC)
+#elif defined(LIBIPC_CPP_17)
   std::destroy(std::begin(*p), std::end(*p));
 #else
   for (auto &elem : *p) destroy(std::addressof(elem));
diff --git a/src/libipc/utility/countof.h b/src/libipc/utility/countof.h
new file mode 100644
index 00000000..0fa2dd8d
--- /dev/null
+++ b/src/libipc/utility/countof.h
@@ -0,0 +1,34 @@
+/**
+ * @file src/countof.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Returns the size of the given range
+ * @date 2022-03-01
+ */
+#pragma once
+
+#include <cstddef>  // std::size_t
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+/**
+ * @see https://en.cppreference.com/w/cpp/iterator/size
+*/
+
+template <typename T, std::size_t N>
+constexpr std::size_t countof(T const (&)[N]) noexcept {
+  return N;
+}
+
+template <typename C>
+constexpr auto countof(C const &c) -> decltype(c.size()) {
+  return c.size();
+}
+
+template <typename C>
+constexpr auto countof(C const &c) -> decltype(c.Size()) {
+  return c.Size();
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/utility/enum_cast.h b/src/libipc/utility/enum_cast.h
new file mode 100644
index 00000000..23fd65ee
--- /dev/null
+++ b/src/libipc/utility/enum_cast.h
@@ -0,0 +1,20 @@
+/**
+ * @file src/enum_cast.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Returns the underlying type of the given enum
+ * @date 2022-03-01
+ */
+#pragma once
+
+#include <type_traits>  // std::underlying_type_t
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+template <typename E>
+constexpr auto enum_cast(E e) noexcept {
+  return static_cast<std::underlying_type_t<E>>(e);
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/test/test_utility.cpp b/test/test_utility.cpp
index 8d3751ea..d2c3dae0 100644
--- a/test/test_utility.cpp
+++ b/test/test_utility.cpp
@@ -6,6 +6,7 @@
 
 #include "libipc/utility/construct.h"
 #include "libipc/utility/pimpl.h"
+#include "libipc/utility/countof.h"
 
 TEST(utility, construct) {
   struct Foo {
@@ -20,18 +21,22 @@ TEST(utility, construct) {
   EXPECT_EQ(pfoo->c_, '1');
   ipc::destroy(pfoo);
 
+  static int bar_test_flag = 0;
   struct Bar : Foo {
     Bar(int a, short b, char c)
-        : Foo{a, b, c} {}
-    ~Bar() { a_ = 0; }
+        : Foo{a, b, c} {
+      ++bar_test_flag;
+    }
+    ~Bar() { --bar_test_flag; }
   };
   std::aligned_storage_t<sizeof(Bar)> bar;
   Bar *pbar = ipc::construct<Bar>(&bar, 123, short(321), '1');
   EXPECT_EQ(pbar->a_, 123);
   EXPECT_EQ(pbar->b_, 321);
   EXPECT_EQ(pbar->c_, '1');
+  EXPECT_EQ(bar_test_flag, 1);
   ipc::destroy(pbar);
-  EXPECT_EQ(pbar->a_, 0);
+  EXPECT_EQ(bar_test_flag, 0);
 
   std::aligned_storage_t<sizeof(Bar)> bars[3];
   for (auto &b : bars) {
@@ -40,11 +45,9 @@ TEST(utility, construct) {
     EXPECT_EQ(pb->b_, 123);
     EXPECT_EQ(pb->c_, '3');
   }
+  EXPECT_EQ(bar_test_flag, ipc::countof(bars));
   ipc::destroy(reinterpret_cast<Bar(*)[3]>(&bars));
-  for (auto &b : bars) {
-    auto pb = reinterpret_cast<Bar *>(&b);
-    EXPECT_EQ(pb->a_, 0);
-  }
+  EXPECT_EQ(bar_test_flag, 0);
 }
 
 namespace {

From daa3c30f4c38ae5bb833449da35160c06e3845ad Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Tue, 1 Mar 2022 11:03:29 +0800
Subject: [PATCH 015/272] =?UTF-8?q?=E6=B7=BB=E5=8A=A0countof=20ut?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 test/test_utility.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/test/test_utility.cpp b/test/test_utility.cpp
index d2c3dae0..6f4d47cd 100644
--- a/test/test_utility.cpp
+++ b/test/test_utility.cpp
@@ -1,6 +1,7 @@
 
 #include <type_traits>  // std::aligned_storage_t
 #include <cstdint>
+#include <vector>
 
 #include "gtest/gtest.h"
 
@@ -86,3 +87,14 @@ TEST(utility, pimpl_inherit) {
   EXPECT_EQ(ipc::pimpl::get(pbar)->pj_, &j);
   pbar->clear();
 }
+
+TEST(utility, countof) {
+  struct {
+    constexpr int Size() const noexcept { return 3; }
+  } sv;
+  std::vector<int> vec {1, 2, 3, 4, 5};
+  int arr[] {7, 6, 5, 4, 3, 2, 1};
+  EXPECT_EQ(ipc::countof(sv) , sv.Size());
+  EXPECT_EQ(ipc::countof(vec), vec.size());
+  EXPECT_EQ(ipc::countof(arr), sizeof(arr) / sizeof(arr[0]));
+}

From 5538a709c9adee9f162a7e6f7686f0541ce279c5 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Tue, 1 Mar 2022 11:50:12 +0800
Subject: [PATCH 016/272] msvc countof ut

---
 src/libipc/utility/countof.h | 53 ++++++++++++++++++++++++++++++++----
 src/libipc/utility/generic.h | 20 ++++++++++++++
 2 files changed, 68 insertions(+), 5 deletions(-)
 create mode 100644 src/libipc/utility/generic.h

diff --git a/src/libipc/utility/countof.h b/src/libipc/utility/countof.h
index 0fa2dd8d..82c1d025 100644
--- a/src/libipc/utility/countof.h
+++ b/src/libipc/utility/countof.h
@@ -9,6 +9,7 @@
 #include <cstddef>  // std::size_t
 
 #include "libipc/def.h"
+#include "libipc/utility/generic.h"
 
 LIBIPC_NAMESPACE_BEG_
 
@@ -21,14 +22,56 @@ constexpr std::size_t countof(T const (&)[N]) noexcept {
   return N;
 }
 
+namespace detail {
+
+template <typename C, typename = void>
+struct countof_trait_has_size {
+  enum : bool { value = false };
+};
+
 template <typename C>
-constexpr auto countof(C const &c) -> decltype(c.size()) {
-  return c.size();
-}
+struct countof_trait_has_size<C, void_t<decltype(std::declval<C>().size())>> {
+  enum : bool { value = true };
+};
+
+template <typename C, typename = void>
+struct countof_trait_has_Size {
+  enum : bool { value = false };
+};
 
 template <typename C>
-constexpr auto countof(C const &c) -> decltype(c.Size()) {
-  return c.Size();
+struct countof_trait_has_Size<C, void_t<decltype(std::declval<C>().Size())>> {
+  enum : bool { value = true };
+};
+
+template <typename C, bool = countof_trait_has_size<C>::value
+                    , bool = countof_trait_has_Size<C>::value>
+struct countof_trait;
+
+template <typename C>
+struct countof_trait<C, true, false> {
+  constexpr static auto countof(C const &c) noexcept(noexcept(c.size())) {
+    return c.size();
+  }
+  using return_t = decltype(countof_trait::countof(std::declval<C>()));
+  enum : bool { noexcept_value = noexcept(countof_trait::countof(std::declval<C>())) };
+};
+
+template <typename C>
+struct countof_trait<C, false, true> {
+  constexpr static auto countof(C const &c) noexcept(noexcept(c.Size())) {
+    return c.Size();
+  }
+  using return_t = decltype(countof_trait::countof(std::declval<C>()));
+  enum : bool { noexcept_value = noexcept(countof_trait::countof(std::declval<C>())) };
+};
+
+} // namespace detail
+
+template <typename C, typename R = detail::countof_trait<C>>
+constexpr auto countof(C const &c) noexcept(R::noexcept_value)
+  -> typename R::return_t {
+  return R::countof(c);
 }
 
 LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/utility/generic.h b/src/libipc/utility/generic.h
new file mode 100644
index 00000000..64810461
--- /dev/null
+++ b/src/libipc/utility/generic.h
@@ -0,0 +1,20 @@
+/**
+ * @file src/generic.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Tools for generic programming
+ * @date 2022-03-01
+ */
+#pragma once
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+/**
+ * @brief Utility metafunction that maps a sequence of any types to the type void
+ * @see https://en.cppreference.com/w/cpp/types/void_t
+*/
+template <typename...>
+using void_t = void;
+
+LIBIPC_NAMESPACE_END_

From da22d0f7b215c0e20a7f2748e2755fa31eff2400 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Tue, 1 Mar 2022 11:55:13 +0800
Subject: [PATCH 017/272] try vc2015 countof ut

---
 src/libipc/utility/countof.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libipc/utility/countof.h b/src/libipc/utility/countof.h
index 82c1d025..b464e689 100644
--- a/src/libipc/utility/countof.h
+++ b/src/libipc/utility/countof.h
@@ -48,8 +48,8 @@ template <typename C, bool = countof_trait_has_size<C>::value
                     , bool = countof_trait_has_Size<C>::value>
 struct countof_trait;
 
-template <typename C>
-struct countof_trait<C, true, false> {
+template <typename C, bool B>
+struct countof_trait<C, true, B> {
   constexpr static auto countof(C const &c) noexcept(noexcept(c.size())) {
     return c.size();
   }

From c4029bcde9f3f9ddfcd9f255298e4a38b2cb49f4 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Tue, 1 Mar 2022 12:03:34 +0800
Subject: [PATCH 018/272] try vc2015 countof ut

---
 src/libipc/utility/countof.h | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/src/libipc/utility/countof.h b/src/libipc/utility/countof.h
index b464e689..39f6999b 100644
--- a/src/libipc/utility/countof.h
+++ b/src/libipc/utility/countof.h
@@ -17,11 +17,6 @@ LIBIPC_NAMESPACE_BEG_
  * @see https://en.cppreference.com/w/cpp/iterator/size
 */
 
-template <typename T, std::size_t N>
-constexpr std::size_t countof(T const (&)[N]) noexcept {
-  return N;
-}
-
 namespace detail {
 
 template <typename C, typename = void>
@@ -48,13 +43,18 @@ template <typename C, bool = countof_trait_has_size<C>::value
                     , bool = countof_trait_has_Size<C>::value>
 struct countof_trait;
 
+template <typename T, std::size_t N>
+struct countof_trait<T[N], false, false> {
+  constexpr static auto countof(T const (&)[N]) noexcept {
+    return N;
+  }
+};
+
 template <typename C, bool B>
 struct countof_trait<C, true, B> {
   constexpr static auto countof(C const &c) noexcept(noexcept(c.size())) {
     return c.size();
   }
-  using return_t = decltype(countof_trait::countof(std::declval<C>()));
-  enum : bool { noexcept_value = noexcept(countof_trait::countof(std::declval<C>())) };
 };
 
 template <typename C>
@@ -62,15 +62,12 @@ struct countof_trait<C, false, true> {
   constexpr static auto countof(C const &c) noexcept(noexcept(c.Size())) {
     return c.Size();
   }
-  using return_t = decltype(countof_trait::countof(std::declval<C>()));
-  enum : bool { noexcept_value = noexcept(countof_trait::countof(std::declval<C>())) };
 };
 
 } // namespace detail
 
 template <typename C, typename R = detail::countof_trait<C>>
-constexpr auto countof(C const &c) noexcept(R::noexcept_value)
-  -> typename R::return_t {
+constexpr auto countof(C const &c) noexcept(noexcept(R::countof(c))) {
   return R::countof(c);
 }
 

From 695462db48339134899cdcb495939362c7282834 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Tue, 1 Mar 2022 13:03:02 +0800
Subject: [PATCH 019/272] fix vc2015 countof ut

---
 src/libipc/utility/countof.h | 35 ++++++++++++++++++++---------------
 test/test_utility.cpp        |  5 ++++-
 2 files changed, 24 insertions(+), 16 deletions(-)

diff --git a/src/libipc/utility/countof.h b/src/libipc/utility/countof.h
index 39f6999b..8685e845 100644
--- a/src/libipc/utility/countof.h
+++ b/src/libipc/utility/countof.h
@@ -6,7 +6,8 @@
  */
 #pragma once
 
-#include <cstddef>  // std::size_t
+#include <type_traits>  // std::declval, std::true_type, std::false_type
+#include <cstddef>      // std::size_t
 
 #include "libipc/def.h"
 #include "libipc/utility/generic.h"
@@ -19,24 +20,28 @@ LIBIPC_NAMESPACE_BEG_
 
 namespace detail {
 
-template <typename C, typename = void>
+template <typename T>
 struct countof_trait_has_size {
-  enum : bool { value = false };
+private:
+  template <typename Type>
+  static std::true_type check(decltype(std::declval<Type>().size())*);
+  template <typename Type>
+  static std::false_type check(...);
+public:
+  using type = decltype(check<T>(nullptr));
+  constexpr static auto value = type::value;
 };
 
-template <typename C>
-struct countof_trait_has_size<C, void_t<decltype(std::declval<C>().size())>> {
-  enum : bool { value = true };
-};
-
-template <typename C, typename = void>
+template <typename T>
 struct countof_trait_has_Size {
-  enum : bool { value = false };
-};
-
-template <typename C>
-struct countof_trait_has_Size<C, void_t<decltype(std::declval<C>().Size())>> {
-  enum : bool { value = true };
+private:
+  template <typename Type>
+  static std::true_type check(decltype(std::declval<Type>().Size())*);
+  template <typename Type>
+  static std::false_type check(...);
+public:
+  using type = decltype(check<T>(nullptr));
+  constexpr static auto value = type::value;
 };
 
 template <typename C, bool = countof_trait_has_size<C>::value
diff --git a/test/test_utility.cpp b/test/test_utility.cpp
index 6f4d47cd..a2e9d8e2 100644
--- a/test/test_utility.cpp
+++ b/test/test_utility.cpp
@@ -46,7 +46,7 @@ TEST(utility, construct) {
     EXPECT_EQ(pb->b_, 123);
     EXPECT_EQ(pb->c_, '3');
   }
-  EXPECT_EQ(bar_test_flag, ipc::countof(bars));
+  //EXPECT_EQ(bar_test_flag, ipc::countof(bars));
   ipc::destroy(reinterpret_cast<Bar(*)[3]>(&bars));
   EXPECT_EQ(bar_test_flag, 0);
 }
@@ -92,6 +92,9 @@ TEST(utility, countof) {
   struct {
     constexpr int Size() const noexcept { return 3; }
   } sv;
+  EXPECT_FALSE(ipc::detail::countof_trait_has_size<decltype(sv)>::value);
+  EXPECT_TRUE (ipc::detail::countof_trait_has_Size<decltype(sv)>::value);
+
   std::vector<int> vec {1, 2, 3, 4, 5};
   int arr[] {7, 6, 5, 4, 3, 2, 1};
   EXPECT_EQ(ipc::countof(sv) , sv.Size());

From 85931e7d20f8e44521145a171c16c56bff5da203 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 3 Apr 2022 17:10:48 +0800
Subject: [PATCH 020/272] add shm.h

---
 include/libipc/shm.h | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 include/libipc/shm.h

diff --git a/include/libipc/shm.h b/include/libipc/shm.h
new file mode 100644
index 00000000..212e87f2
--- /dev/null
+++ b/include/libipc/shm.h
@@ -0,0 +1,7 @@
+/**
+ * @file shm.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define the shared memory access interface
+ * @date 2022-04-03
+ */
+#pragma once

From e5f722937ebdace29152dc5dd80054f0cb8565e6 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 17 Apr 2022 11:42:04 +0800
Subject: [PATCH 021/272] add 'result'

---
 include/libipc/mmap.h              | 16 ++++++++++
 include/libipc/result.h            | 37 ++++++++++++++++++++++
 include/libipc/shm.h               | 10 +++++-
 src/libipc/result.cpp              | 50 ++++++++++++++++++++++++++++++
 src/libipc/utility/horrible_cast.h | 25 +++++++++++++++
 src/libipc/utility/pimpl.h         |  2 +-
 6 files changed, 138 insertions(+), 2 deletions(-)
 create mode 100644 include/libipc/mmap.h
 create mode 100644 include/libipc/result.h
 create mode 100644 src/libipc/result.cpp
 create mode 100644 src/libipc/utility/horrible_cast.h

diff --git a/include/libipc/mmap.h b/include/libipc/mmap.h
new file mode 100644
index 00000000..01c61c5e
--- /dev/null
+++ b/include/libipc/mmap.h
@@ -0,0 +1,16 @@
+/**
+ * @file mmap.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define the methods of memory-mapped file I/O
+ * @date 2022-04-17
+ */
+#pragma once
+
+#include "libipc/def.h"
+#include "libipc/result.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+
+
+LIBIPC_NAMESPACE_END_
diff --git a/include/libipc/result.h b/include/libipc/result.h
new file mode 100644
index 00000000..2ad7c234
--- /dev/null
+++ b/include/libipc/result.h
@@ -0,0 +1,37 @@
+/**
+ * @file result.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define the return value type with a status code
+ * @date 2022-04-17
+ */
+#pragma once
+
+#include <ostream>  // std::ostream
+#include <cstdint>
+
+#include "libipc/def.h"
+#include "libipc/export.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+class LIBIPC_EXPORT result {
+  std::uint64_t status_;
+
+public:
+  result() noexcept;
+  result(bool ok, std::uint64_t code = 0) noexcept;
+
+  std::uint64_t code() const noexcept;
+  bool ok() const noexcept;
+
+  explicit operator bool() const noexcept {
+    return ok();
+  }
+
+  friend bool operator==(result const &lhs, result const &rhs) noexcept;
+  friend bool operator!=(result const &lhs, result const &rhs) noexcept;
+
+  friend std::ostream &operator<<(std::ostream &o, result const &r) noexcept;
+};
+
+LIBIPC_NAMESPACE_END_
diff --git a/include/libipc/shm.h b/include/libipc/shm.h
index 212e87f2..408a8aa0 100644
--- a/include/libipc/shm.h
+++ b/include/libipc/shm.h
@@ -2,6 +2,14 @@
  * @file shm.h
  * @author mutouyun (orz@orzz.org)
  * @brief Define the shared memory access interface
- * @date 2022-04-03
+ * @date 2022-04-17
  */
 #pragma once
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/result.cpp b/src/libipc/result.cpp
new file mode 100644
index 00000000..1110fe9a
--- /dev/null
+++ b/src/libipc/result.cpp
@@ -0,0 +1,50 @@
+
+#include "libipc/result.h"
+#include "libipc/utility/horrible_cast.h"
+
+LIBIPC_NAMESPACE_BEG_
+namespace {
+
+struct result_code_info {
+  std::uint64_t ok  : 1;
+  std::uint64_t code: 63;
+};
+
+std::uint64_t make_status(bool ok, std::uint64_t code) noexcept {
+  return horrible_cast<std::uint64_t>(result_code_info{ok ? 1ull : 0ull, code});
+}
+
+result_code_info info_cast(std::uint64_t status) noexcept {
+  return horrible_cast<result_code_info>(status);
+}
+
+} // namespace
+
+result::result() noexcept
+  : result(false, 0) {}
+
+result::result(bool ok, std::uint64_t code) noexcept
+  : status_(make_status(ok, code)) {}
+
+std::uint64_t result::code() const noexcept {
+  return info_cast(status_).code;
+}
+
+bool result::ok() const noexcept {
+  return info_cast(status_).ok != 0;
+}
+
+bool operator==(result const &lhs, result const &rhs) noexcept {
+  return lhs.status_ == rhs.status_;
+}
+
+bool operator!=(result const &lhs, result const &rhs) noexcept {
+  return lhs.status_ != rhs.status_;
+}
+
+std::ostream &operator<<(std::ostream &o, result const &r) noexcept {
+  o << "[" << (r.ok() ? "succ" : "fail") << ", code = " << r.code() << "]";
+  return o;
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/utility/horrible_cast.h b/src/libipc/utility/horrible_cast.h
new file mode 100644
index 00000000..907882c7
--- /dev/null
+++ b/src/libipc/utility/horrible_cast.h
@@ -0,0 +1,25 @@
+/**
+ * @file src/horrible_cast.h
+ * @author mutouyun (orz@orzz.org)
+ * @date 2022-04-17
+ */
+#pragma once
+
+#include <type_traits>  // std::decay_t
+#include <utility>
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+template <typename T, typename U>
+constexpr auto horrible_cast(U &&in) noexcept
+  -> std::enable_if_t<(sizeof(T) == sizeof(std::decay_t<U>)), T> {
+  union {
+    std::decay_t<U> in;
+    T out;
+  } u {std::forward<U>(in)};
+  return u.out;
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/utility/pimpl.h b/src/libipc/utility/pimpl.h
index 596fe947..5ec7af09 100644
--- a/src/libipc/utility/pimpl.h
+++ b/src/libipc/utility/pimpl.h
@@ -58,7 +58,7 @@ auto clear(T *p) noexcept -> std::enable_if_t<!is_comfortable<T>::value> {
 
 template <typename T>
 class Obj {
- public:
+public:
   template <typename... A>
   static T *make(A &&... args) {
     return pimpl::make<T>(std::forward<A>(args)...);

From 2fb49eb3c46594b99f28e336aea347754cd655d0 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 17 Apr 2022 12:23:01 +0800
Subject: [PATCH 022/272] add ut

---
 include/libipc/mmap.h |  1 +
 test/test_result.cpp  | 73 +++++++++++++++++++++++++++++++++++++++++++
 test/test_utility.cpp | 25 +++++++++++++++
 3 files changed, 99 insertions(+)
 create mode 100644 test/test_result.cpp

diff --git a/include/libipc/mmap.h b/include/libipc/mmap.h
index 01c61c5e..d8d57be7 100644
--- a/include/libipc/mmap.h
+++ b/include/libipc/mmap.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include "libipc/def.h"
+#include "libipc/export.h"
 #include "libipc/result.h"
 
 LIBIPC_NAMESPACE_BEG_
diff --git a/test/test_result.cpp b/test/test_result.cpp
new file mode 100644
index 00000000..b89d2b3a
--- /dev/null
+++ b/test/test_result.cpp
@@ -0,0 +1,73 @@
+
+#include <sstream>
+
+#include "gtest/gtest.h"
+
+#include "libipc/result.h"
+
+TEST(result, ok) {
+  ipc::result ret;
+  EXPECT_FALSE(ret);
+  EXPECT_FALSE(ret.ok());
+  EXPECT_EQ(ret.code(), 0);
+
+  ret = {true};
+  EXPECT_TRUE(ret);
+  EXPECT_TRUE(ret.ok());
+  EXPECT_EQ(ret.code(), 0);
+
+  ret = {false, 1234};
+  EXPECT_FALSE(ret);
+  EXPECT_FALSE(ret.ok());
+  EXPECT_EQ(ret.code(), 1234);
+}
+
+TEST(result, code) {
+  ipc::result ret(true, 1234);
+  EXPECT_TRUE(ret);
+  EXPECT_TRUE(ret.ok());
+  EXPECT_EQ(ret.code(), 1234);
+
+  ret = {false};
+  EXPECT_FALSE(ret);
+  EXPECT_FALSE(ret.ok());
+  EXPECT_EQ(ret.code(), 0);
+
+  ret = {true, 4321};
+  EXPECT_TRUE(ret);
+  EXPECT_TRUE(ret.ok());
+  EXPECT_EQ(ret.code(), 4321);
+}
+
+TEST(result, compare) {
+  ipc::result r1, r2;
+  EXPECT_EQ(r1, r2);
+
+  ipc::result r3(true);
+  EXPECT_NE(r1, r3);
+
+  ipc::result r4(true, 222222);
+  EXPECT_NE(r3, r4);
+
+  ipc::result r5(false, 222222);
+  EXPECT_NE(r4, r5);
+  r3 = r5;
+  EXPECT_EQ(r3, r5);
+}
+
+TEST(result, print) {
+  std::stringstream ss;
+  ipc::result r1;
+  ss << r1;
+  EXPECT_EQ(ss.str(), "[fail, code = 0]");
+
+  ss = {};
+  ipc::result r2(true, 65537);
+  ss << r2;
+  EXPECT_EQ(ss.str(), "[succ, code = 65537]");
+
+  ss = {};
+  ipc::result r3(true);
+  ss << r3;
+  EXPECT_EQ(ss.str(), "[succ, code = 0]");
+}
\ No newline at end of file
diff --git a/test/test_utility.cpp b/test/test_utility.cpp
index a2e9d8e2..ba2bec74 100644
--- a/test/test_utility.cpp
+++ b/test/test_utility.cpp
@@ -8,6 +8,9 @@
 #include "libipc/utility/construct.h"
 #include "libipc/utility/pimpl.h"
 #include "libipc/utility/countof.h"
+#include "libipc/utility/horrible_cast.h"
+
+#include "libipc/detect_plat.h"
 
 TEST(utility, construct) {
   struct Foo {
@@ -101,3 +104,25 @@ TEST(utility, countof) {
   EXPECT_EQ(ipc::countof(vec), vec.size());
   EXPECT_EQ(ipc::countof(arr), sizeof(arr) / sizeof(arr[0]));
 }
+
+TEST(utility, horrible_cast) {
+  struct A {
+    int a_;
+  } a {123};
+
+  struct B {
+    char a_[sizeof(int)];
+  } b = ipc::horrible_cast<B>(a);
+
+  EXPECT_EQ(b.a_[1], 0);
+  EXPECT_EQ(b.a_[2], 0);
+#if LIBIPC_ENDIAN_LIT
+  EXPECT_EQ(b.a_[0], 123);
+  EXPECT_EQ(b.a_[3], 0);
+#else
+  EXPECT_EQ(b.a_[3], 123);
+  EXPECT_EQ(b.a_[0], 0);
+#endif
+
+  // ipc::horrible_cast<std::uint32_t>(0ll);
+}
\ No newline at end of file

From 7d6eac4e6b9925c9afa95551dabe9305e318ba51 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 23 Apr 2022 18:30:43 +0800
Subject: [PATCH 023/272] add: libimp for utilities

---
 .../utility => include/libimp}/construct.h    |  18 +-
 .../utility => include/libimp}/countof.h      |  10 +-
 include/libimp/def.h                          |  22 +++
 include/libimp/detect_plat.h                  | 155 ++++++++++++++++++
 .../utility => include/libimp}/enum_cast.h    |   8 +-
 include/libimp/export.h                       |  46 ++++++
 .../utility => include/libimp}/generic.h      |   8 +-
 .../libimp}/horrible_cast.h                   |   8 +-
 .../libipc/utility => include/libimp}/pimpl.h |  10 +-
 include/{libipc => libimp}/result.h           |  12 +-
 include/libipc/def.h                          |   2 +-
 include/libipc/detect_plat.h                  | 155 ------------------
 include/libipc/export.h                       |  46 ------
 include/libipc/mmap.h                         |   6 +-
 include/libipc/shm.h                          |   2 +-
 include/libipc/spin_lock.h                    |   4 +-
 src/CMakeLists.txt                            |  47 +-----
 src/libimp/CMakeLists.txt                     |  25 +++
 src/{libipc => libimp}/result.cpp             |   8 +-
 src/libipc/CMakeLists.txt                     |  47 ++++++
 test/CMakeLists.txt                           |   2 +-
 test/test_detect_plat.cpp                     |  56 +++----
 test/test_result.cpp                          |  20 +--
 test/test_utility.cpp                         |  61 ++++---
 24 files changed, 414 insertions(+), 364 deletions(-)
 rename {src/libipc/utility => include/libimp}/construct.h (86%)
 rename {src/libipc/utility => include/libimp}/countof.h (93%)
 create mode 100644 include/libimp/def.h
 create mode 100644 include/libimp/detect_plat.h
 rename {src/libipc/utility => include/libimp}/enum_cast.h (76%)
 create mode 100644 include/libimp/export.h
 rename {src/libipc/utility => include/libimp}/generic.h (76%)
 rename {src/libipc/utility => include/libimp}/horrible_cast.h (79%)
 rename {src/libipc/utility => include/libimp}/pimpl.h (92%)
 rename include/{libipc => libimp}/result.h (81%)
 delete mode 100644 include/libipc/detect_plat.h
 delete mode 100755 include/libipc/export.h
 create mode 100644 src/libimp/CMakeLists.txt
 rename src/{libipc => libimp}/result.cpp (90%)
 create mode 100644 src/libipc/CMakeLists.txt

diff --git a/src/libipc/utility/construct.h b/include/libimp/construct.h
similarity index 86%
rename from src/libipc/utility/construct.h
rename to include/libimp/construct.h
index ad21ffd5..4b485b11 100644
--- a/src/libipc/utility/construct.h
+++ b/include/libimp/construct.h
@@ -1,5 +1,5 @@
 /**
- * @file src/construct.h
+ * @file libimp/construct.h
  * @author mutouyun (orz@orzz.org)
  * @brief Construct an object from a memory buffer
  * @date 2022-02-27
@@ -12,10 +12,10 @@
 #include <memory>       // std::construct_at, std::destroy_at, std::addressof
 #include <cstddef>
 
-#include "libipc/def.h"
-#include "libipc/detect_plat.h"
+#include "libimp/def.h"
+#include "libimp/detect_plat.h"
 
-LIBIPC_NAMESPACE_BEG_
+LIBIMP_NAMESPACE_BEG_
 
 /**
  * @brief Creates an object at a given address, like 'construct_at' in c++20
@@ -25,7 +25,7 @@ LIBIPC_NAMESPACE_BEG_
 template <typename T, typename... A>
 auto construct(void *p, A &&... args)
   -> std::enable_if_t<::std::is_constructible<T, A...>::value, T *> {
-#if defined(LIBIPC_CPP_20)
+#if defined(LIBIMP_CPP_20)
   return std::construct_at(static_cast<T *>(p), std::forward<A>(args)...);
 #else
   return ::new (p) T(std::forward<A>(args)...);
@@ -45,7 +45,7 @@ auto construct(void *p, A &&... args)
 
 template <typename T>
 void *destroy(T *p) noexcept {
-#if defined(LIBIPC_CPP_17)
+#if defined(LIBIMP_CPP_17)
   std::destroy_at(p);
 #else
   p->~T();
@@ -55,9 +55,9 @@ void *destroy(T *p) noexcept {
 
 template <typename T, std::size_t N>
 void *destroy(T (*p)[N]) noexcept {
-#if defined(LIBIPC_CPP_20)
+#if defined(LIBIMP_CPP_20)
   std::destroy_at(p);
-#elif defined(LIBIPC_CPP_17)
+#elif defined(LIBIMP_CPP_17)
   std::destroy(std::begin(*p), std::end(*p));
 #else
   for (auto &elem : *p) destroy(std::addressof(elem));
@@ -65,4 +65,4 @@ void *destroy(T (*p)[N]) noexcept {
   return p;
 }
 
-LIBIPC_NAMESPACE_END_
+LIBIMP_NAMESPACE_END_
diff --git a/src/libipc/utility/countof.h b/include/libimp/countof.h
similarity index 93%
rename from src/libipc/utility/countof.h
rename to include/libimp/countof.h
index 8685e845..59c0d39f 100644
--- a/src/libipc/utility/countof.h
+++ b/include/libimp/countof.h
@@ -1,5 +1,5 @@
 /**
- * @file src/countof.h
+ * @file libimp/countof.h
  * @author mutouyun (orz@orzz.org)
  * @brief Returns the size of the given range
  * @date 2022-03-01
@@ -9,10 +9,10 @@
 #include <type_traits>  // std::declval, std::true_type, std::false_type
 #include <cstddef>      // std::size_t
 
-#include "libipc/def.h"
-#include "libipc/utility/generic.h"
+#include "libimp/def.h"
+#include "libimp/generic.h"
 
-LIBIPC_NAMESPACE_BEG_
+LIBIMP_NAMESPACE_BEG_
 
 /**
  * @see https://en.cppreference.com/w/cpp/iterator/size
@@ -76,4 +76,4 @@ constexpr auto countof(C const &c) noexcept(noexcept(R::countof(c))) {
   return R::countof(c);
 }
 
-LIBIPC_NAMESPACE_END_
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/def.h b/include/libimp/def.h
new file mode 100644
index 00000000..0b5ffb08
--- /dev/null
+++ b/include/libimp/def.h
@@ -0,0 +1,22 @@
+/**
+ * @file libimp/def.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define the trivial configuration information
+ * @date 2022-04-23
+ */
+#pragma once
+
+#include <cstddef>
+#include <cstdint>
+
+#if !defined(LIBIMP_NAMESPACE)
+# define LIBIMP_NAMESPACE imp
+#endif
+#define LIBIMP_NAMESPACE_BEG_ namespace LIBIMP_NAMESPACE {
+#define LIBIMP_NAMESPACE_END_ }
+
+LIBIMP_NAMESPACE_BEG_
+
+// constants
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
new file mode 100644
index 00000000..13d51047
--- /dev/null
+++ b/include/libimp/detect_plat.h
@@ -0,0 +1,155 @@
+/**
+ * @file libimp/detect_plat.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define platform detection related interfaces
+ * @date 2022-02-27
+ */
+#pragma once
+
+// OS
+
+#if defined(WINCE) || defined(_WIN32_WCE)
+# define LIBIMP_OS_WINCE
+#elif defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
+     (defined(__x86_64) && defined(__MSYS__))
+#define LIBIMP_OS_WIN64
+#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || \
+      defined(__NT__) || defined(__MSYS__)
+# define LIBIMP_OS_WIN32
+#elif defined(__linux__) || defined(__linux)
+# define LIBIMP_OS_LINUX
+#elif defined(__QNX__) || defined(__QNXNTO__)
+# define LIBIMP_OS_QNX
+#elif defined(ANDROID) || defined(__ANDROID__)
+# define LIBIMP_OS_ANDROID
+#else
+# error "This OS is unsupported."
+#endif
+
+#if defined(LIBIMP_OS_WIN32) || defined(LIBIMP_OS_WIN64) || \
+    defined(LIBIMP_OS_WINCE)
+# define LIBIMP_OS_WIN
+#endif
+
+// Compiler
+
+#if defined(_MSC_VER)
+# define LIBIMP_CC_MSVC
+#elif defined(__GNUC__)
+# define LIBIMP_CC_GNUC
+#else
+# error "This compiler is unsupported."
+#endif
+
+// Instruction set
+// @see https://sourceforge.net/p/predef/wiki/Architectures/
+
+#if defined(_M_X64) || defined(_M_AMD64) || \
+    defined(__x86_64__) || defined(__x86_64) || \
+    defined(__amd64__) || defined(__amd64)
+# define LIBIMP_INSTR_X64
+#elif defined(_M_IA64) || defined(__IA64__) || defined(_IA64) || \
+      defined(__ia64__) || defined(__ia64)
+# define LIBIMP_INSTR_I64
+#elif defined(_M_IX86) || defined(_X86_) || defined(__i386__) || defined(__i386)
+# define LIBIMP_INSTR_X86
+#elif defined(_M_ARM64) || defined(__arm64__) || defined(__aarch64__)
+# define LIBIMP_INSTR_ARM64
+#elif defined(_M_ARM) || defined(_ARM) || defined(__arm__) || defined(__arm)
+# define LIBIMP_INSTR_ARM32
+#else
+# error "This instruction set is unsupported."
+#endif
+
+#if defined(LIBIMP_INSTR_X86) || defined(LIBIMP_INSTR_X64)
+# define LIBIMP_INSTR_X86_64
+#elif defined(LIBIMP_INSTR_ARM32) || defined(LIBIMP_INSTR_ARM64)
+# define LIBIMP_INSTR_ARM
+#endif
+
+// Byte order
+
+#if defined(__BYTE_ORDER__)
+# define LIBIMP_ENDIAN_BIG   (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
+# define LIBIMP_ENDIAN_LIT   (!LIBIMP_ENDIAN_BIG)
+#else
+# define LIBIMP_ENDIAN_BIG   (0)
+# define LIBIMP_ENDIAN_LIT   (1)
+#endif
+
+// C++ version
+
+#if (__cplusplus >= 202002L) && !defined(LIBIMP_CPP_20)
+# define LIBIMP_CPP_20
+#endif
+#if (__cplusplus >= 201703L) && !defined(LIBIMP_CPP_17)
+# define LIBIMP_CPP_17
+#endif
+#if /*(__cplusplus >= 201402L) &&*/ !defined(LIBIMP_CPP_14)
+# define LIBIMP_CPP_14
+#endif
+
+#if !defined(LIBIMP_CPP_20) && \
+    !defined(LIBIMP_CPP_17) && \
+    !defined(LIBIMP_CPP_14)
+# error "This C++ version is unsupported."
+#endif
+
+// C++ attributes
+
+#if defined(__has_cpp_attribute)
+# if __has_cpp_attribute(fallthrough)
+#   define LIBIMP_FALLTHROUGH [[fallthrough]]
+# endif
+# if __has_cpp_attribute(maybe_unused)
+#   define LIBIMP_UNUSED [[maybe_unused]]
+# endif
+# if __has_cpp_attribute(likely)
+#   define LIBIMP_LIKELY(...) (__VA_ARGS__) [[likely]]
+# endif
+# if __has_cpp_attribute(unlikely)
+#   define LIBIMP_UNLIKELY(...) (__VA_ARGS__) [[unlikely]]
+# endif
+#endif
+
+#if !defined(LIBIMP_FALLTHROUGH)
+# if defined(LIBIMP_CC_GNUC)
+#   define LIBIMP_FALLTHROUGH __attribute__((__fallthrough__))
+# else
+#   define LIBIMP_FALLTHROUGH
+# endif
+#endif
+
+#if !defined(LIBIMP_UNUSED)
+# if defined(LIBIMP_CC_GNUC)
+#   define LIBIMP_UNUSED __attribute__((__unused__))
+# elif defined(LIBIMP_CC_MSVC)
+#   define LIBIMP_UNUSED __pragma(warning(suppress: 4100 4101 4189))
+# else
+#   define LIBIMP_UNUSED
+# endif
+#endif
+
+#if !defined(LIBIMP_LIKELY)
+# if defined(__has_builtin)
+#   if __has_builtin(__builtin_expect)
+#     define LIBIMP_LIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 1))
+#   endif
+# endif
+#endif
+
+#if !defined(LIBIMP_LIKELY)
+# define LIBIMP_LIKELY(...) (__VA_ARGS__)
+#endif
+
+#if !defined(LIBIMP_UNLIKELY)
+# if defined(__has_builtin)
+#   if __has_builtin(__builtin_expect)
+#     define LIBIMP_UNLIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 0))
+#   endif
+# endif
+#endif
+
+#if !defined(LIBIMP_UNLIKELY)
+# define LIBIMP_UNLIKELY(...) (__VA_ARGS__)
+#endif
diff --git a/src/libipc/utility/enum_cast.h b/include/libimp/enum_cast.h
similarity index 76%
rename from src/libipc/utility/enum_cast.h
rename to include/libimp/enum_cast.h
index 23fd65ee..31377a10 100644
--- a/src/libipc/utility/enum_cast.h
+++ b/include/libimp/enum_cast.h
@@ -1,5 +1,5 @@
 /**
- * @file src/enum_cast.h
+ * @file libimp/enum_cast.h
  * @author mutouyun (orz@orzz.org)
  * @brief Returns the underlying type of the given enum
  * @date 2022-03-01
@@ -8,13 +8,13 @@
 
 #include <type_traits>  // std::underlying_type_t
 
-#include "libipc/def.h"
+#include "libimp/def.h"
 
-LIBIPC_NAMESPACE_BEG_
+LIBIMP_NAMESPACE_BEG_
 
 template <typename E>
 constexpr auto enum_cast(E e) noexcept {
   return static_cast<std::underlying_type_t<E>>(e);
 }
 
-LIBIPC_NAMESPACE_END_
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/export.h b/include/libimp/export.h
new file mode 100644
index 00000000..8d1d4759
--- /dev/null
+++ b/include/libimp/export.h
@@ -0,0 +1,46 @@
+/**
+ * @file libimp/export.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define the symbol export interfaces
+ * @date 2022-02-27
+ */
+#pragma once
+
+#include "libimp/detect_plat.h"
+
+#if defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
+
+# define LIBIMP_DECL_EXPORT Q_DECL_EXPORT
+# define LIBIMP_DECL_IMPORT Q_DECL_IMPORT
+
+#else // defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
+
+/*
+ * Compiler & system detection for LIBIMP_DECL_EXPORT & LIBIMP_DECL_IMPORT.
+ * Not using QtCore cause it shouldn't depend on Qt.
+*/
+# if defined(LIBIMP_CC_MSVC) || defined(LIBIMP_OS_WIN)
+#   define LIBIMP_DECL_EXPORT __declspec(dllexport)
+#   define LIBIMP_DECL_IMPORT __declspec(dllimport)
+# elif defined(LIBIMP_OS_ANDROID) || defined(LIBIMP_OS_LINUX) || defined(LIBIMP_CC_GNUC)
+#   define LIBIMP_DECL_EXPORT __attribute__((visibility("default")))
+#   define LIBIMP_DECL_IMPORT __attribute__((visibility("default")))
+# else
+#   define LIBIMP_DECL_EXPORT __attribute__((visibility("default")))
+#   define LIBIMP_DECL_IMPORT __attribute__((visibility("default")))
+# endif
+
+#endif // defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
+
+/*
+ * Define LIBIMP_EXPORT for exporting function & class.
+*/
+#ifndef LIBIMP_EXPORT
+# if defined(LIBIMP_LIBRARY_SHARED_BUILDING__)
+#   define LIBIMP_EXPORT LIBIMP_DECL_EXPORT
+# elif defined(LIBIMP_LIBRARY_SHARED_USING__)
+#   define LIBIMP_EXPORT LIBIMP_DECL_IMPORT
+# else
+#   define LIBIMP_EXPORT
+# endif
+#endif /*LIBIMP_EXPORT*/
diff --git a/src/libipc/utility/generic.h b/include/libimp/generic.h
similarity index 76%
rename from src/libipc/utility/generic.h
rename to include/libimp/generic.h
index 64810461..2f11b6cb 100644
--- a/src/libipc/utility/generic.h
+++ b/include/libimp/generic.h
@@ -1,14 +1,14 @@
 /**
- * @file src/generic.h
+ * @file libimp/generic.h
  * @author mutouyun (orz@orzz.org)
  * @brief Tools for generic programming
  * @date 2022-03-01
  */
 #pragma once
 
-#include "libipc/def.h"
+#include "libimp/def.h"
 
-LIBIPC_NAMESPACE_BEG_
+LIBIMP_NAMESPACE_BEG_
 
 /**
  * @brief Utility metafunction that maps a sequence of any types to the type void
@@ -17,4 +17,4 @@ LIBIPC_NAMESPACE_BEG_
 template <typename...>
 using void_t = void;
 
-LIBIPC_NAMESPACE_END_
+LIBIMP_NAMESPACE_END_
diff --git a/src/libipc/utility/horrible_cast.h b/include/libimp/horrible_cast.h
similarity index 79%
rename from src/libipc/utility/horrible_cast.h
rename to include/libimp/horrible_cast.h
index 907882c7..88520c6f 100644
--- a/src/libipc/utility/horrible_cast.h
+++ b/include/libimp/horrible_cast.h
@@ -1,5 +1,5 @@
 /**
- * @file src/horrible_cast.h
+ * @file libimp/horrible_cast.h
  * @author mutouyun (orz@orzz.org)
  * @date 2022-04-17
  */
@@ -8,9 +8,9 @@
 #include <type_traits>  // std::decay_t
 #include <utility>
 
-#include "libipc/def.h"
+#include "libimp/def.h"
 
-LIBIPC_NAMESPACE_BEG_
+LIBIMP_NAMESPACE_BEG_
 
 template <typename T, typename U>
 constexpr auto horrible_cast(U &&in) noexcept
@@ -22,4 +22,4 @@ constexpr auto horrible_cast(U &&in) noexcept
   return u.out;
 }
 
-LIBIPC_NAMESPACE_END_
+LIBIMP_NAMESPACE_END_
diff --git a/src/libipc/utility/pimpl.h b/include/libimp/pimpl.h
similarity index 92%
rename from src/libipc/utility/pimpl.h
rename to include/libimp/pimpl.h
index 5ec7af09..9e018f0c 100644
--- a/src/libipc/utility/pimpl.h
+++ b/include/libimp/pimpl.h
@@ -1,5 +1,5 @@
 /**
- * @file src/pimpl.h
+ * @file libimp/pimpl.h
  * @author mutouyun (orz@orzz.org)
  * @brief Pointer To Implementation (pImpl) idiom
  * @date 2022-02-27
@@ -10,10 +10,10 @@
 #include <type_traits>
 #include <cstdint>
 
-#include "libipc/utility/construct.h"
-#include "libipc/def.h"
+#include "libimp/construct.h"
+#include "libimp/def.h"
 
-LIBIPC_NAMESPACE_BEG_
+LIBIMP_NAMESPACE_BEG_
 namespace pimpl {
 
 template <typename T, typename R = T *>
@@ -70,4 +70,4 @@ class Obj {
 };
 
 } // namespace pimpl
-LIBIPC_NAMESPACE_END_
+LIBIMP_NAMESPACE_END_
diff --git a/include/libipc/result.h b/include/libimp/result.h
similarity index 81%
rename from include/libipc/result.h
rename to include/libimp/result.h
index 2ad7c234..92b39db5 100644
--- a/include/libipc/result.h
+++ b/include/libimp/result.h
@@ -1,5 +1,5 @@
 /**
- * @file result.h
+ * @file libimp/result.h
  * @author mutouyun (orz@orzz.org)
  * @brief Define the return value type with a status code
  * @date 2022-04-17
@@ -9,12 +9,12 @@
 #include <ostream>  // std::ostream
 #include <cstdint>
 
-#include "libipc/def.h"
-#include "libipc/export.h"
+#include "libimp/def.h"
+#include "libimp/export.h"
 
-LIBIPC_NAMESPACE_BEG_
+LIBIMP_NAMESPACE_BEG_
 
-class LIBIPC_EXPORT result {
+class LIBIMP_EXPORT result {
   std::uint64_t status_;
 
 public:
@@ -34,4 +34,4 @@ class LIBIPC_EXPORT result {
   friend std::ostream &operator<<(std::ostream &o, result const &r) noexcept;
 };
 
-LIBIPC_NAMESPACE_END_
+LIBIMP_NAMESPACE_END_
diff --git a/include/libipc/def.h b/include/libipc/def.h
index de9a4965..aa0c0c84 100755
--- a/include/libipc/def.h
+++ b/include/libipc/def.h
@@ -1,5 +1,5 @@
 /**
- * @file def.h
+ * @file libipc/def.h
  * @author mutouyun (orz@orzz.org)
  * @brief Define the trivial configuration information
  * @date 2022-02-27
diff --git a/include/libipc/detect_plat.h b/include/libipc/detect_plat.h
deleted file mode 100644
index a90aef27..00000000
--- a/include/libipc/detect_plat.h
+++ /dev/null
@@ -1,155 +0,0 @@
-/**
- * @file detect_plat.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define platform detection related interfaces
- * @date 2022-02-27
- */
-#pragma once
-
-// OS
-
-#if defined(WINCE) || defined(_WIN32_WCE)
-# define LIBIPC_OS_WINCE
-#elif defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
-     (defined(__x86_64) && defined(__MSYS__))
-#define LIBIPC_OS_WIN64
-#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || \
-      defined(__NT__) || defined(__MSYS__)
-# define LIBIPC_OS_WIN32
-#elif defined(__linux__) || defined(__linux)
-# define LIBIPC_OS_LINUX
-#elif defined(__QNX__) || defined(__QNXNTO__)
-# define LIBIPC_OS_QNX
-#elif defined(ANDROID) || defined(__ANDROID__)
-# define LIBIPC_OS_ANDROID
-#else
-# error "This OS is unsupported."
-#endif
-
-#if defined(LIBIPC_OS_WIN32) || defined(LIBIPC_OS_WIN64) || \
-    defined(LIBIPC_OS_WINCE)
-# define LIBIPC_OS_WIN
-#endif
-
-// Compiler
-
-#if defined(_MSC_VER)
-# define LIBIPC_CC_MSVC
-#elif defined(__GNUC__)
-# define LIBIPC_CC_GNUC
-#else
-# error "This compiler is unsupported."
-#endif
-
-// Instruction set
-// @see https://sourceforge.net/p/predef/wiki/Architectures/
-
-#if defined(_M_X64) || defined(_M_AMD64) || \
-    defined(__x86_64__) || defined(__x86_64) || \
-    defined(__amd64__) || defined(__amd64)
-# define LIBIPC_INSTR_X64
-#elif defined(_M_IA64) || defined(__IA64__) || defined(_IA64) || \
-      defined(__ia64__) || defined(__ia64)
-# define LIBIPC_INSTR_I64
-#elif defined(_M_IX86) || defined(_X86_) || defined(__i386__) || defined(__i386)
-# define LIBIPC_INSTR_X86
-#elif defined(_M_ARM64) || defined(__arm64__) || defined(__aarch64__)
-# define LIBIPC_INSTR_ARM64
-#elif defined(_M_ARM) || defined(_ARM) || defined(__arm__) || defined(__arm)
-# define LIBIPC_INSTR_ARM32
-#else
-# error "This instruction set is unsupported."
-#endif
-
-#if defined(LIBIPC_INSTR_X86) || defined(LIBIPC_INSTR_X64)
-# define LIBIPC_INSTR_X86_64
-#elif defined(LIBIPC_INSTR_ARM32) || defined(LIBIPC_INSTR_ARM64)
-# define LIBIPC_INSTR_ARM
-#endif
-
-// Byte order
-
-#if defined(__BYTE_ORDER__)
-# define LIBIPC_ENDIAN_BIG   (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
-# define LIBIPC_ENDIAN_LIT   (!LIBIPC_ENDIAN_BIG)
-#else
-# define LIBIPC_ENDIAN_BIG   (0)
-# define LIBIPC_ENDIAN_LIT   (1)
-#endif
-
-// C++ version
-
-#if (__cplusplus >= 202002L) && !defined(LIBIPC_CPP_20)
-# define LIBIPC_CPP_20
-#endif
-#if (__cplusplus >= 201703L) && !defined(LIBIPC_CPP_17)
-# define LIBIPC_CPP_17
-#endif
-#if /*(__cplusplus >= 201402L) &&*/ !defined(LIBIPC_CPP_14)
-# define LIBIPC_CPP_14
-#endif
-
-#if !defined(LIBIPC_CPP_20) && \
-    !defined(LIBIPC_CPP_17) && \
-    !defined(LIBIPC_CPP_14)
-# error "This C++ version is unsupported."
-#endif
-
-// C++ attributes
-
-#if defined(__has_cpp_attribute)
-# if __has_cpp_attribute(fallthrough)
-#   define LIBIPC_FALLTHROUGH [[fallthrough]]
-# endif
-# if __has_cpp_attribute(maybe_unused)
-#   define LIBIPC_UNUSED [[maybe_unused]]
-# endif
-# if __has_cpp_attribute(likely)
-#   define LIBIPC_LIKELY(...) (__VA_ARGS__) [[likely]]
-# endif
-# if __has_cpp_attribute(unlikely)
-#   define LIBIPC_UNLIKELY(...) (__VA_ARGS__) [[unlikely]]
-# endif
-#endif
-
-#if !defined(LIBIPC_FALLTHROUGH)
-# if defined(LIBIPC_CC_GNUC)
-#   define LIBIPC_FALLTHROUGH __attribute__((__fallthrough__))
-# else
-#   define LIBIPC_FALLTHROUGH
-# endif
-#endif
-
-#if !defined(LIBIPC_UNUSED)
-# if defined(LIBIPC_CC_GNUC)
-#   define LIBIPC_UNUSED __attribute__((__unused__))
-# elif defined(LIBIPC_CC_MSVC)
-#   define LIBIPC_UNUSED __pragma(warning(suppress: 4100 4101 4189))
-# else
-#   define LIBIPC_UNUSED
-# endif
-#endif
-
-#if !defined(LIBIPC_LIKELY)
-# if defined(__has_builtin)
-#   if __has_builtin(__builtin_expect)
-#     define LIBIPC_LIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 1))
-#   endif
-# endif
-#endif
-
-#if !defined(LIBIPC_LIKELY)
-# define LIBIPC_LIKELY(...) (__VA_ARGS__)
-#endif
-
-#if !defined(LIBIPC_UNLIKELY)
-# if defined(__has_builtin)
-#   if __has_builtin(__builtin_expect)
-#     define LIBIPC_UNLIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 0))
-#   endif
-# endif
-#endif
-
-#if !defined(LIBIPC_UNLIKELY)
-# define LIBIPC_UNLIKELY(...) (__VA_ARGS__)
-#endif
diff --git a/include/libipc/export.h b/include/libipc/export.h
deleted file mode 100755
index 40a68797..00000000
--- a/include/libipc/export.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/**
- * @file export.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define the symbol export interfaces
- * @date 2022-02-27
- */
-#pragma once
-
-#include "libipc/detect_plat.h"
-
-#if defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
-
-# define LIBIPC_DECL_EXPORT Q_DECL_EXPORT
-# define LIBIPC_DECL_IMPORT Q_DECL_IMPORT
-
-#else // defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
-
-/*
- * Compiler & system detection for LIBIPC_DECL_EXPORT & LIBIPC_DECL_IMPORT.
- * Not using QtCore cause it shouldn't depend on Qt.
-*/
-# if defined(LIBIPC_CC_MSVC) || defined(LIBIPC_OS_WIN)
-#   define LIBIPC_DECL_EXPORT __declspec(dllexport)
-#   define LIBIPC_DECL_IMPORT __declspec(dllimport)
-# elif defined(LIBIPC_OS_ANDROID) || defined(LIBIPC_OS_LINUX) || defined(LIBIPC_CC_GNUC)
-#   define LIBIPC_DECL_EXPORT __attribute__((visibility("default")))
-#   define LIBIPC_DECL_IMPORT __attribute__((visibility("default")))
-# else
-#   define LIBIPC_DECL_EXPORT __attribute__((visibility("default")))
-#   define LIBIPC_DECL_IMPORT __attribute__((visibility("default")))
-# endif
-
-#endif // defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
-
-/*
- * Define LIBIPC_EXPORT for exporting function & class.
-*/
-#ifndef LIBIPC_EXPORT
-# if defined(LIBIPC_LIBRARY_SHARED_BUILDING__)
-#   define LIBIPC_EXPORT LIBIPC_DECL_EXPORT
-# elif defined(LIBIPC_LIBRARY_SHARED_USING__)
-#   define LIBIPC_EXPORT LIBIPC_DECL_IMPORT
-# else
-#   define LIBIPC_EXPORT
-# endif
-#endif /*LIBIPC_EXPORT*/
diff --git a/include/libipc/mmap.h b/include/libipc/mmap.h
index d8d57be7..aefeb143 100644
--- a/include/libipc/mmap.h
+++ b/include/libipc/mmap.h
@@ -1,14 +1,14 @@
 /**
- * @file mmap.h
+ * @file libipc/mmap.h
  * @author mutouyun (orz@orzz.org)
  * @brief Define the methods of memory-mapped file I/O
  * @date 2022-04-17
  */
 #pragma once
 
+#include "libimp/export.h"
+#include "libimp/result.h"
 #include "libipc/def.h"
-#include "libipc/export.h"
-#include "libipc/result.h"
 
 LIBIPC_NAMESPACE_BEG_
 
diff --git a/include/libipc/shm.h b/include/libipc/shm.h
index 408a8aa0..b2ed5196 100644
--- a/include/libipc/shm.h
+++ b/include/libipc/shm.h
@@ -1,5 +1,5 @@
 /**
- * @file shm.h
+ * @file libipc/shm.h
  * @author mutouyun (orz@orzz.org)
  * @brief Define the shared memory access interface
  * @date 2022-04-17
diff --git a/include/libipc/spin_lock.h b/include/libipc/spin_lock.h
index 1ed94d95..7f318895 100644
--- a/include/libipc/spin_lock.h
+++ b/include/libipc/spin_lock.h
@@ -1,5 +1,5 @@
 /**
- * @file spin_lock.h
+ * @file libipc/spin_lock.h
  * @author mutouyun (orz@orzz.org)
  * @brief Define spin locks
  * @date 2022-02-27
@@ -13,7 +13,7 @@
 #include <type_traits>
 #include <utility>
 
-#include "libipc/detect_plat.h"
+#include "libimp/detect_plat.h"
 #include "libipc/def.h"
 
 /**
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 37efae1c..38f4cb30 100755
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,46 +1,3 @@
-project(ipc)
 
-aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libipc SRC_FILES)
-
-file(GLOB HEAD_FILES
-  ${LIBIPC_PROJECT_DIR}/include/libipc/*.h)
-
-if (LIBIPC_BUILD_SHARED_LIBS)
-  add_library(${PROJECT_NAME} SHARED ${SRC_FILES} ${HEAD_FILES})
-  target_compile_definitions(${PROJECT_NAME}
-    INTERFACE
-      LIBIPC_LIBRARY_SHARED_USING__
-    PRIVATE
-      LIBIPC_LIBRARY_SHARED_BUILDING__)
-else()
-  add_library(${PROJECT_NAME} STATIC ${SRC_FILES} ${HEAD_FILES})
-endif()
-
-# set output directory
-set_target_properties(${PROJECT_NAME}
-	PROPERTIES
-	ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
-	LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
-	RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
-
-# set version
-set_target_properties(${PROJECT_NAME}
-  PROPERTIES
-  VERSION 2.0.0
-  SOVERSION 4)
-
-target_include_directories(${PROJECT_NAME}
-  PUBLIC  ${LIBIPC_PROJECT_DIR}/include
-  PRIVATE ${LIBIPC_PROJECT_DIR}/src)
-
-if(NOT MSVC)
-  target_link_libraries(${PROJECT_NAME} PUBLIC
-    $<$<NOT:$<STREQUAL:${CMAKE_SYSTEM_NAME},QNX>>:pthread>
-    $<$<NOT:$<OR:$<STREQUAL:${CMAKE_SYSTEM_NAME},Windows>,$<STREQUAL:${CMAKE_SYSTEM_NAME},QNX>>>:rt>)
-endif()
-
-install(
-  TARGETS ${PROJECT_NAME}
-  RUNTIME DESTINATION bin
-  LIBRARY DESTINATION lib
-  ARCHIVE DESTINATION lib)
+add_subdirectory(libimp)
+add_subdirectory(libipc)
diff --git a/src/libimp/CMakeLists.txt b/src/libimp/CMakeLists.txt
new file mode 100644
index 00000000..f61ecf1c
--- /dev/null
+++ b/src/libimp/CMakeLists.txt
@@ -0,0 +1,25 @@
+project(imp)
+
+aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libimp SRC_FILES)
+
+file(GLOB HEAD_FILES
+  ${LIBIPC_PROJECT_DIR}/include/libimp/*.h)
+
+add_library(${PROJECT_NAME} STATIC ${SRC_FILES} ${HEAD_FILES})
+
+# set output directory
+set_target_properties(${PROJECT_NAME}
+	PROPERTIES
+	ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+	LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+	RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
+
+target_include_directories(${PROJECT_NAME}
+  PUBLIC  ${LIBIPC_PROJECT_DIR}/include
+  PRIVATE ${LIBIPC_PROJECT_DIR}/src)
+
+install(
+  TARGETS ${PROJECT_NAME}
+  RUNTIME DESTINATION bin
+  LIBRARY DESTINATION lib
+  ARCHIVE DESTINATION lib)
diff --git a/src/libipc/result.cpp b/src/libimp/result.cpp
similarity index 90%
rename from src/libipc/result.cpp
rename to src/libimp/result.cpp
index 1110fe9a..055703f5 100644
--- a/src/libipc/result.cpp
+++ b/src/libimp/result.cpp
@@ -1,8 +1,8 @@
 
-#include "libipc/result.h"
-#include "libipc/utility/horrible_cast.h"
+#include "libimp/result.h"
+#include "libimp/horrible_cast.h"
 
-LIBIPC_NAMESPACE_BEG_
+LIBIMP_NAMESPACE_BEG_
 namespace {
 
 struct result_code_info {
@@ -47,4 +47,4 @@ std::ostream &operator<<(std::ostream &o, result const &r) noexcept {
   return o;
 }
 
-LIBIPC_NAMESPACE_END_
+LIBIMP_NAMESPACE_END_
diff --git a/src/libipc/CMakeLists.txt b/src/libipc/CMakeLists.txt
new file mode 100644
index 00000000..60007c13
--- /dev/null
+++ b/src/libipc/CMakeLists.txt
@@ -0,0 +1,47 @@
+project(ipc)
+
+aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libipc SRC_FILES)
+
+file(GLOB HEAD_FILES
+  ${LIBIPC_PROJECT_DIR}/include/libipc/*.h)
+
+if (LIBIPC_BUILD_SHARED_LIBS)
+  add_library(${PROJECT_NAME} SHARED ${SRC_FILES} ${HEAD_FILES})
+  target_compile_definitions(${PROJECT_NAME}
+    INTERFACE
+      LIBIPC_LIBRARY_SHARED_USING__
+    PRIVATE
+      LIBIPC_LIBRARY_SHARED_BUILDING__)
+else()
+  add_library(${PROJECT_NAME} STATIC ${SRC_FILES} ${HEAD_FILES})
+endif()
+
+# set output directory
+set_target_properties(${PROJECT_NAME}
+	PROPERTIES
+	ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+	LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+	RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
+
+# set version
+set_target_properties(${PROJECT_NAME}
+  PROPERTIES
+  VERSION 2.0.0
+  SOVERSION 4)
+
+target_include_directories(${PROJECT_NAME}
+  PUBLIC  ${LIBIPC_PROJECT_DIR}/include
+  PRIVATE ${LIBIPC_PROJECT_DIR}/src)
+
+if(NOT MSVC)
+  target_link_libraries(${PROJECT_NAME} PUBLIC
+    $<$<NOT:$<STREQUAL:${CMAKE_SYSTEM_NAME},QNX>>:pthread>
+    $<$<NOT:$<OR:$<STREQUAL:${CMAKE_SYSTEM_NAME},Windows>,$<STREQUAL:${CMAKE_SYSTEM_NAME},QNX>>>:rt>)
+endif()
+target_link_libraries(${PROJECT_NAME} PUBLIC imp)
+
+install(
+  TARGETS ${PROJECT_NAME}
+  RUNTIME DESTINATION bin
+  LIBRARY DESTINATION lib
+  ARCHIVE DESTINATION lib)
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index dfd7fc24..8633271f 100755
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -21,5 +21,5 @@ file(GLOB HEAD_FILES ${LIBIPC_PROJECT_DIR}/test/*.h)
 add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
 
 link_directories(${LIBIPC_PROJECT_DIR}/3rdparty/gperftools)
-target_link_libraries(${PROJECT_NAME} gtest gtest_main ipc)
+target_link_libraries(${PROJECT_NAME} gtest gtest_main imp ipc)
 #target_link_libraries(${PROJECT_NAME} tcmalloc_minimal)
diff --git a/test/test_detect_plat.cpp b/test/test_detect_plat.cpp
index 99ec8a2b..4ec8400a 100644
--- a/test/test_detect_plat.cpp
+++ b/test/test_detect_plat.cpp
@@ -4,45 +4,45 @@
 
 #include "gtest/gtest.h"
 
-#include "libipc/detect_plat.h"
+#include "libimp/detect_plat.h"
 
 namespace {
 
 } // namespace
 
 TEST(detect_plat, os) {
-#if defined(LIBIPC_OS_WINCE)
-  std::cout << "LIBIPC_OS_WINCE\n";
-#elif defined(LIBIPC_OS_WIN)
-  std::cout << "LIBIPC_OS_WIN\n";
-#elif defined(LIBIPC_OS_LINUX)
-  std::cout << "LIBIPC_OS_LINUX\n";
-#elif defined(LIBIPC_OS_QNX)
-  std::cout << "LIBIPC_OS_QNX\n";
-#elif defined(LIBIPC_OS_ANDROID)
-  std::cout << "LIBIPC_OS_ANDROID\n";
+#if defined(LIBIMP_OS_WINCE)
+  std::cout << "LIBIMP_OS_WINCE\n";
+#elif defined(LIBIMP_OS_WIN)
+  std::cout << "LIBIMP_OS_WIN\n";
+#elif defined(LIBIMP_OS_LINUX)
+  std::cout << "LIBIMP_OS_LINUX\n";
+#elif defined(LIBIMP_OS_QNX)
+  std::cout << "LIBIMP_OS_QNX\n";
+#elif defined(LIBIMP_OS_ANDROID)
+  std::cout << "LIBIMP_OS_ANDROID\n";
 #else
   ASSERT_TRUE(false);
 #endif
 }
 
 TEST(detect_plat, cc) {
-#if defined(LIBIPC_CC_MSVC)
-  std::cout << "LIBIPC_CC_MSVC\n";
-#elif defined(LIBIPC_CC_GNUC)
-  std::cout << "LIBIPC_CC_GNUC\n";
+#if defined(LIBIMP_CC_MSVC)
+  std::cout << "LIBIMP_CC_MSVC\n";
+#elif defined(LIBIMP_CC_GNUC)
+  std::cout << "LIBIMP_CC_GNUC\n";
 #else
   ASSERT_TRUE(false);
 #endif
 }
 
 TEST(detect_plat, cpp) {
-#if defined(LIBIPC_CPP_20)
-  std::cout << "LIBIPC_CPP_20\n";
-#elif defined(LIBIPC_CPP_17)
-  std::cout << "LIBIPC_CPP_17\n";
-#elif defined(LIBIPC_CPP_14)
-  std::cout << "LIBIPC_CPP_14\n";
+#if defined(LIBIMP_CPP_20)
+  std::cout << "LIBIMP_CPP_20\n";
+#elif defined(LIBIMP_CPP_17)
+  std::cout << "LIBIMP_CPP_17\n";
+#elif defined(LIBIMP_CPP_14)
+  std::cout << "LIBIMP_CPP_14\n";
 #else
   ASSERT_TRUE(false);
 #endif
@@ -57,18 +57,18 @@ TEST(detect_plat, byte_order) {
     c.a = 1;
     return c.b == 1;
   };
-  EXPECT_EQ(!!LIBIPC_ENDIAN_LIT, is_endian_little());
-  EXPECT_NE(!!LIBIPC_ENDIAN_BIG, is_endian_little());
+  EXPECT_EQ(!!LIBIMP_ENDIAN_LIT, is_endian_little());
+  EXPECT_NE(!!LIBIMP_ENDIAN_BIG, is_endian_little());
 }
 
 TEST(detect_plat, fallthrough) {
   switch (0) {
   case 0:
     std::cout << "fallthrough 0\n";
-    LIBIPC_FALLTHROUGH;
+    LIBIMP_FALLTHROUGH;
   case 1:
     std::cout << "fallthrough 1\n";
-    LIBIPC_FALLTHROUGH;
+    LIBIMP_FALLTHROUGH;
   default:
     std::cout << "fallthrough default\n";
     break;
@@ -76,14 +76,14 @@ TEST(detect_plat, fallthrough) {
 }
 
 TEST(detect_plat, unused) {
-  LIBIPC_UNUSED int abc;
+  LIBIMP_UNUSED int abc;
 }
 
 TEST(detect_plat, likely_unlikely) {
   int xx = sizeof(int);
-  if LIBIPC_LIKELY(xx < sizeof(long long)) {
+  if LIBIMP_LIKELY(xx < sizeof(long long)) {
     std::cout << "sizeof(int) < sizeof(long long)\n";
-  } else if LIBIPC_UNLIKELY(xx < sizeof(char)) {
+  } else if LIBIMP_UNLIKELY(xx < sizeof(char)) {
     std::cout << "sizeof(int) < sizeof(char)\n";
   } else {
     std::cout << "sizeof(int) < whatever\n";
diff --git a/test/test_result.cpp b/test/test_result.cpp
index b89d2b3a..e04c6e35 100644
--- a/test/test_result.cpp
+++ b/test/test_result.cpp
@@ -3,10 +3,10 @@
 
 #include "gtest/gtest.h"
 
-#include "libipc/result.h"
+#include "libimp/result.h"
 
 TEST(result, ok) {
-  ipc::result ret;
+  imp::result ret;
   EXPECT_FALSE(ret);
   EXPECT_FALSE(ret.ok());
   EXPECT_EQ(ret.code(), 0);
@@ -23,7 +23,7 @@ TEST(result, ok) {
 }
 
 TEST(result, code) {
-  ipc::result ret(true, 1234);
+  imp::result ret(true, 1234);
   EXPECT_TRUE(ret);
   EXPECT_TRUE(ret.ok());
   EXPECT_EQ(ret.code(), 1234);
@@ -40,16 +40,16 @@ TEST(result, code) {
 }
 
 TEST(result, compare) {
-  ipc::result r1, r2;
+  imp::result r1, r2;
   EXPECT_EQ(r1, r2);
 
-  ipc::result r3(true);
+  imp::result r3(true);
   EXPECT_NE(r1, r3);
 
-  ipc::result r4(true, 222222);
+  imp::result r4(true, 222222);
   EXPECT_NE(r3, r4);
 
-  ipc::result r5(false, 222222);
+  imp::result r5(false, 222222);
   EXPECT_NE(r4, r5);
   r3 = r5;
   EXPECT_EQ(r3, r5);
@@ -57,17 +57,17 @@ TEST(result, compare) {
 
 TEST(result, print) {
   std::stringstream ss;
-  ipc::result r1;
+  imp::result r1;
   ss << r1;
   EXPECT_EQ(ss.str(), "[fail, code = 0]");
 
   ss = {};
-  ipc::result r2(true, 65537);
+  imp::result r2(true, 65537);
   ss << r2;
   EXPECT_EQ(ss.str(), "[succ, code = 65537]");
 
   ss = {};
-  ipc::result r3(true);
+  imp::result r3(true);
   ss << r3;
   EXPECT_EQ(ss.str(), "[succ, code = 0]");
 }
\ No newline at end of file
diff --git a/test/test_utility.cpp b/test/test_utility.cpp
index ba2bec74..c16def49 100644
--- a/test/test_utility.cpp
+++ b/test/test_utility.cpp
@@ -5,12 +5,11 @@
 
 #include "gtest/gtest.h"
 
-#include "libipc/utility/construct.h"
-#include "libipc/utility/pimpl.h"
-#include "libipc/utility/countof.h"
-#include "libipc/utility/horrible_cast.h"
-
-#include "libipc/detect_plat.h"
+#include "libimp/construct.h"
+#include "libimp/pimpl.h"
+#include "libimp/countof.h"
+#include "libimp/horrible_cast.h"
+#include "libimp/detect_plat.h"
 
 TEST(utility, construct) {
   struct Foo {
@@ -19,11 +18,11 @@ TEST(utility, construct) {
     char c_;
   };
   std::aligned_storage_t<sizeof(Foo)> foo;
-  Foo *pfoo = ipc::construct<Foo>(&foo, 123, short{321}, '1');
+  Foo *pfoo = imp::construct<Foo>(&foo, 123, short{321}, '1');
   EXPECT_EQ(pfoo->a_, 123);
   EXPECT_EQ(pfoo->b_, 321);
   EXPECT_EQ(pfoo->c_, '1');
-  ipc::destroy(pfoo);
+  imp::destroy(pfoo);
 
   static int bar_test_flag = 0;
   struct Bar : Foo {
@@ -34,34 +33,34 @@ TEST(utility, construct) {
     ~Bar() { --bar_test_flag; }
   };
   std::aligned_storage_t<sizeof(Bar)> bar;
-  Bar *pbar = ipc::construct<Bar>(&bar, 123, short(321), '1');
+  Bar *pbar = imp::construct<Bar>(&bar, 123, short(321), '1');
   EXPECT_EQ(pbar->a_, 123);
   EXPECT_EQ(pbar->b_, 321);
   EXPECT_EQ(pbar->c_, '1');
   EXPECT_EQ(bar_test_flag, 1);
-  ipc::destroy(pbar);
+  imp::destroy(pbar);
   EXPECT_EQ(bar_test_flag, 0);
 
   std::aligned_storage_t<sizeof(Bar)> bars[3];
   for (auto &b : bars) {
-    auto pb = ipc::construct<Bar>(&b, 321, short(123), '3');
+    auto pb = imp::construct<Bar>(&b, 321, short(123), '3');
     EXPECT_EQ(pb->a_, 321);
     EXPECT_EQ(pb->b_, 123);
     EXPECT_EQ(pb->c_, '3');
   }
-  //EXPECT_EQ(bar_test_flag, ipc::countof(bars));
-  ipc::destroy(reinterpret_cast<Bar(*)[3]>(&bars));
+  //EXPECT_EQ(bar_test_flag, imp::countof(bars));
+  imp::destroy(reinterpret_cast<Bar(*)[3]>(&bars));
   EXPECT_EQ(bar_test_flag, 0);
 }
 
 namespace {
 
-struct Foo : ipc::pimpl::Obj<Foo> {
+struct Foo : imp::pimpl::Obj<Foo> {
   int *pi_;
   Foo(int *pi) : pi_(pi) {}
 };
 
-struct Bar : ipc::pimpl::Obj<Bar> {
+struct Bar : imp::pimpl::Obj<Bar> {
   int *pi_;
   int *pj_;
   Bar(int *pi, int *pj) : pi_(pi), pj_(pj) {}
@@ -70,24 +69,24 @@ struct Bar : ipc::pimpl::Obj<Bar> {
 } // namespace
 
 TEST(utility, pimpl_is_comfortable) {
-  EXPECT_TRUE ((ipc::pimpl::is_comfortable<std::int32_t, std::int64_t>::value));
-  EXPECT_TRUE ((ipc::pimpl::is_comfortable<std::int64_t, std::int64_t>::value));
-  EXPECT_FALSE((ipc::pimpl::is_comfortable<std::int64_t, std::int32_t>::value));
+  EXPECT_TRUE ((imp::pimpl::is_comfortable<std::int32_t, std::int64_t>::value));
+  EXPECT_TRUE ((imp::pimpl::is_comfortable<std::int64_t, std::int64_t>::value));
+  EXPECT_FALSE((imp::pimpl::is_comfortable<std::int64_t, std::int32_t>::value));
 
-  EXPECT_TRUE ((ipc::pimpl::is_comfortable<Foo>::value));
-  EXPECT_FALSE((ipc::pimpl::is_comfortable<Bar>::value));
+  EXPECT_TRUE ((imp::pimpl::is_comfortable<Foo>::value));
+  EXPECT_FALSE((imp::pimpl::is_comfortable<Bar>::value));
 }
 
 TEST(utility, pimpl_inherit) {
   int i = 123;
   Foo *pfoo = Foo::make(&i);
-  EXPECT_EQ(ipc::pimpl::get(pfoo)->pi_, &i);
+  EXPECT_EQ(imp::pimpl::get(pfoo)->pi_, &i);
   pfoo->clear();
 
   int j = 321;
   Bar *pbar = Bar::make(&i, &j);
-  EXPECT_EQ(ipc::pimpl::get(pbar)->pi_, &i);
-  EXPECT_EQ(ipc::pimpl::get(pbar)->pj_, &j);
+  EXPECT_EQ(imp::pimpl::get(pbar)->pi_, &i);
+  EXPECT_EQ(imp::pimpl::get(pbar)->pj_, &j);
   pbar->clear();
 }
 
@@ -95,14 +94,14 @@ TEST(utility, countof) {
   struct {
     constexpr int Size() const noexcept { return 3; }
   } sv;
-  EXPECT_FALSE(ipc::detail::countof_trait_has_size<decltype(sv)>::value);
-  EXPECT_TRUE (ipc::detail::countof_trait_has_Size<decltype(sv)>::value);
+  EXPECT_FALSE(imp::detail::countof_trait_has_size<decltype(sv)>::value);
+  EXPECT_TRUE (imp::detail::countof_trait_has_Size<decltype(sv)>::value);
 
   std::vector<int> vec {1, 2, 3, 4, 5};
   int arr[] {7, 6, 5, 4, 3, 2, 1};
-  EXPECT_EQ(ipc::countof(sv) , sv.Size());
-  EXPECT_EQ(ipc::countof(vec), vec.size());
-  EXPECT_EQ(ipc::countof(arr), sizeof(arr) / sizeof(arr[0]));
+  EXPECT_EQ(imp::countof(sv) , sv.Size());
+  EXPECT_EQ(imp::countof(vec), vec.size());
+  EXPECT_EQ(imp::countof(arr), sizeof(arr) / sizeof(arr[0]));
 }
 
 TEST(utility, horrible_cast) {
@@ -112,11 +111,11 @@ TEST(utility, horrible_cast) {
 
   struct B {
     char a_[sizeof(int)];
-  } b = ipc::horrible_cast<B>(a);
+  } b = imp::horrible_cast<B>(a);
 
   EXPECT_EQ(b.a_[1], 0);
   EXPECT_EQ(b.a_[2], 0);
-#if LIBIPC_ENDIAN_LIT
+#if LIBIMP_ENDIAN_LIT
   EXPECT_EQ(b.a_[0], 123);
   EXPECT_EQ(b.a_[3], 0);
 #else
@@ -124,5 +123,5 @@ TEST(utility, horrible_cast) {
   EXPECT_EQ(b.a_[0], 0);
 #endif
 
-  // ipc::horrible_cast<std::uint32_t>(0ll);
+  // imp::horrible_cast<std::uint32_t>(0ll);
 }
\ No newline at end of file

From 4efb50070d167d60dd8ee2f32d457a7a9c17abb7 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 15 May 2022 16:38:20 +0800
Subject: [PATCH 024/272] add benchmark

---
 3rdparty/benchmark/.clang-format              |    5 +
 3rdparty/benchmark/.clang-tidy                |    7 +
 3rdparty/benchmark/.gitignore                 |   67 +
 3rdparty/benchmark/.travis.yml                |  208 ++
 3rdparty/benchmark/.ycm_extra_conf.py         |  115 ++
 3rdparty/benchmark/AUTHORS                    |   63 +
 3rdparty/benchmark/BUILD.bazel                |   52 +
 3rdparty/benchmark/CMakeLists.txt             |  342 ++++
 3rdparty/benchmark/CONTRIBUTING.md            |   58 +
 3rdparty/benchmark/CONTRIBUTORS               |   87 +
 3rdparty/benchmark/LICENSE                    |  202 ++
 3rdparty/benchmark/README.md                  |  216 ++
 3rdparty/benchmark/WORKSPACE                  |   44 +
 3rdparty/benchmark/_config.yml                |    2 +
 3rdparty/benchmark/appveyor.yml               |   50 +
 3rdparty/benchmark/bindings/python/BUILD      |    3 +
 .../benchmark/bindings/python/build_defs.bzl  |   25 +
 .../bindings/python/google_benchmark/BUILD    |   38 +
 .../python/google_benchmark/__init__.py       |  158 ++
 .../python/google_benchmark/benchmark.cc      |  181 ++
 .../python/google_benchmark/example.py        |  136 ++
 .../benchmark/bindings/python/pybind11.BUILD  |   20 +
 .../bindings/python/python_headers.BUILD      |    6 +
 .../bindings/python/requirements.txt          |    2 +
 .../benchmark/cmake/AddCXXCompilerFlag.cmake  |   78 +
 .../benchmark/cmake/CXXFeatureCheck.cmake     |   69 +
 3rdparty/benchmark/cmake/Config.cmake.in      |    7 +
 3rdparty/benchmark/cmake/GetGitVersion.cmake  |   58 +
 3rdparty/benchmark/cmake/GoogleTest.cmake     |   48 +
 3rdparty/benchmark/cmake/GoogleTest.cmake.in  |   59 +
 .../benchmark/cmake/Modules/FindLLVMAr.cmake  |   16 +
 .../benchmark/cmake/Modules/FindLLVMNm.cmake  |   16 +
 .../cmake/Modules/FindLLVMRanLib.cmake        |   15 +
 .../benchmark/cmake/Modules/FindPFM.cmake     |   26 +
 3rdparty/benchmark/cmake/benchmark.pc.in      |   12 +
 3rdparty/benchmark/cmake/gnu_posix_regex.cpp  |   12 +
 3rdparty/benchmark/cmake/llvm-toolchain.cmake |    8 +
 3rdparty/benchmark/cmake/posix_regex.cpp      |   14 +
 3rdparty/benchmark/cmake/split_list.cmake     |    3 +
 3rdparty/benchmark/cmake/std_regex.cpp        |   10 +
 3rdparty/benchmark/cmake/steady_clock.cpp     |    7 +
 .../cmake/thread_safety_attributes.cpp        |    4 +
 3rdparty/benchmark/docs/AssemblyTests.md      |  147 ++
 3rdparty/benchmark/docs/_config.yml           |    1 +
 3rdparty/benchmark/docs/dependencies.md       |   19 +
 3rdparty/benchmark/docs/index.md              |   10 +
 3rdparty/benchmark/docs/perf_counters.md      |   34 +
 .../platform_specific_build_instructions.md   |   48 +
 .../benchmark/docs/random_interleaving.md     |   13 +
 3rdparty/benchmark/docs/releasing.md          |   35 +
 3rdparty/benchmark/docs/tools.md              |  203 ++
 3rdparty/benchmark/docs/user_guide.md         | 1200 +++++++++++
 .../benchmark/include/benchmark/benchmark.h   | 1765 +++++++++++++++++
 3rdparty/benchmark/requirements.txt           |    3 +
 3rdparty/benchmark/setup.py                   |  143 ++
 3rdparty/benchmark/src/CMakeLists.txt         |  159 ++
 3rdparty/benchmark/src/arraysize.h            |   33 +
 3rdparty/benchmark/src/benchmark.cc           |  626 ++++++
 .../benchmark/src/benchmark_api_internal.cc   |  112 ++
 .../benchmark/src/benchmark_api_internal.h    |   84 +
 3rdparty/benchmark/src/benchmark_main.cc      |   17 +
 3rdparty/benchmark/src/benchmark_name.cc      |   58 +
 3rdparty/benchmark/src/benchmark_register.cc  |  492 +++++
 3rdparty/benchmark/src/benchmark_register.h   |  108 +
 3rdparty/benchmark/src/benchmark_runner.cc    |  359 ++++
 3rdparty/benchmark/src/benchmark_runner.h     |  104 +
 3rdparty/benchmark/src/check.h                |   90 +
 3rdparty/benchmark/src/colorprint.cc          |  188 ++
 3rdparty/benchmark/src/colorprint.h           |   33 +
 3rdparty/benchmark/src/commandlineflags.cc    |  285 +++
 3rdparty/benchmark/src/commandlineflags.h     |  116 ++
 3rdparty/benchmark/src/complexity.cc          |  244 +++
 3rdparty/benchmark/src/complexity.h           |   55 +
 3rdparty/benchmark/src/console_reporter.cc    |  190 ++
 3rdparty/benchmark/src/counter.cc             |   80 +
 3rdparty/benchmark/src/counter.h              |   32 +
 3rdparty/benchmark/src/csv_reporter.cc        |  158 ++
 3rdparty/benchmark/src/cycleclock.h           |  225 +++
 3rdparty/benchmark/src/internal_macros.h      |  102 +
 3rdparty/benchmark/src/json_reporter.cc       |  323 +++
 3rdparty/benchmark/src/log.h                  |   74 +
 3rdparty/benchmark/src/mutex.h                |  155 ++
 3rdparty/benchmark/src/perf_counters.cc       |  132 ++
 3rdparty/benchmark/src/perf_counters.h        |  172 ++
 3rdparty/benchmark/src/re.h                   |  158 ++
 3rdparty/benchmark/src/reporter.cc            |  114 ++
 3rdparty/benchmark/src/sleep.cc               |   66 +
 3rdparty/benchmark/src/sleep.h                |   15 +
 3rdparty/benchmark/src/statistics.cc          |  208 ++
 3rdparty/benchmark/src/statistics.h           |   38 +
 3rdparty/benchmark/src/string_util.cc         |  265 +++
 3rdparty/benchmark/src/string_util.h          |   65 +
 3rdparty/benchmark/src/sysinfo.cc             |  725 +++++++
 3rdparty/benchmark/src/thread_manager.h       |   63 +
 3rdparty/benchmark/src/thread_timer.h         |   86 +
 3rdparty/benchmark/src/timers.cc              |  259 +++
 3rdparty/benchmark/src/timers.h               |   48 +
 3rdparty/benchmark/test/AssemblyTests.cmake   |   46 +
 3rdparty/benchmark/test/BUILD                 |   75 +
 3rdparty/benchmark/test/CMakeLists.txt        |  277 +++
 3rdparty/benchmark/test/args_product_test.cc  |   77 +
 3rdparty/benchmark/test/basic_test.cc         |  179 ++
 3rdparty/benchmark/test/benchmark_gtest.cc    |  165 ++
 .../benchmark/test/benchmark_name_gtest.cc    |   74 +
 .../benchmark_random_interleaving_gtest.cc    |  127 ++
 .../test/benchmark_setup_teardown_test.cc     |  157 ++
 3rdparty/benchmark/test/benchmark_test.cc     |  247 +++
 .../test/clobber_memory_assembly_test.cc      |   63 +
 .../benchmark/test/commandlineflags_gtest.cc  |  228 +++
 3rdparty/benchmark/test/complexity_test.cc    |  226 +++
 3rdparty/benchmark/test/cxx03_test.cc         |   62 +
 3rdparty/benchmark/test/diagnostics_test.cc   |   80 +
 .../test/display_aggregates_only_test.cc      |   45 +
 .../test/donotoptimize_assembly_test.cc       |  161 ++
 3rdparty/benchmark/test/donotoptimize_test.cc |   53 +
 3rdparty/benchmark/test/filter_test.cc        |  118 ++
 3rdparty/benchmark/test/fixture_test.cc       |   51 +
 .../benchmark/test/internal_threading_test.cc |  185 ++
 3rdparty/benchmark/test/link_main_test.cc     |    8 +
 3rdparty/benchmark/test/map_test.cc           |   57 +
 .../benchmark/test/memory_manager_test.cc     |   46 +
 .../benchmark/test/multiple_ranges_test.cc    |   96 +
 3rdparty/benchmark/test/options_test.cc       |   75 +
 3rdparty/benchmark/test/output_test.h         |  211 ++
 3rdparty/benchmark/test/output_test_helper.cc |  517 +++++
 .../benchmark/test/perf_counters_gtest.cc     |  145 ++
 3rdparty/benchmark/test/perf_counters_test.cc |   27 +
 .../benchmark/test/register_benchmark_test.cc |  184 ++
 3rdparty/benchmark/test/repetitions_test.cc   |  214 ++
 .../test/report_aggregates_only_test.cc       |   41 +
 .../benchmark/test/reporter_output_test.cc    | 1127 +++++++++++
 .../benchmark/test/skip_with_error_test.cc    |  196 ++
 3rdparty/benchmark/test/spec_arg_test.cc      |   95 +
 .../benchmark/test/state_assembly_test.cc     |   68 +
 3rdparty/benchmark/test/statistics_gtest.cc   |   35 +
 3rdparty/benchmark/test/string_util_gtest.cc  |  152 ++
 .../benchmark/test/templated_fixture_test.cc  |   28 +
 .../test/user_counters_tabular_test.cc        |  557 ++++++
 3rdparty/benchmark/test/user_counters_test.cc |  555 ++++++
 .../test/user_counters_thousands_test.cc      |  186 ++
 3rdparty/benchmark/tools/BUILD.bazel          |   19 +
 3rdparty/benchmark/tools/compare.py           |  429 ++++
 .../tools/gbench/Inputs/test1_run1.json       |  119 ++
 .../tools/gbench/Inputs/test1_run2.json       |  119 ++
 .../tools/gbench/Inputs/test2_run.json        |   81 +
 .../tools/gbench/Inputs/test3_run0.json       |   65 +
 .../tools/gbench/Inputs/test3_run1.json       |   65 +
 .../tools/gbench/Inputs/test4_run.json        |   96 +
 .../tools/gbench/Inputs/test4_run0.json       |   21 +
 .../tools/gbench/Inputs/test4_run1.json       |   21 +
 3rdparty/benchmark/tools/gbench/__init__.py   |    8 +
 3rdparty/benchmark/tools/gbench/report.py     | 1144 +++++++++++
 3rdparty/benchmark/tools/gbench/util.py       |  181 ++
 3rdparty/benchmark/tools/requirements.txt     |    1 +
 3rdparty/benchmark/tools/strip_asm.py         |  151 ++
 CMakeLists.txt                                |    6 +
 benchmark/CMakeLists.txt                      |   23 +
 test/CMakeLists.txt                           |    6 +-
 158 files changed, 22953 insertions(+), 4 deletions(-)
 create mode 100644 3rdparty/benchmark/.clang-format
 create mode 100644 3rdparty/benchmark/.clang-tidy
 create mode 100644 3rdparty/benchmark/.gitignore
 create mode 100644 3rdparty/benchmark/.travis.yml
 create mode 100644 3rdparty/benchmark/.ycm_extra_conf.py
 create mode 100644 3rdparty/benchmark/AUTHORS
 create mode 100644 3rdparty/benchmark/BUILD.bazel
 create mode 100644 3rdparty/benchmark/CMakeLists.txt
 create mode 100644 3rdparty/benchmark/CONTRIBUTING.md
 create mode 100644 3rdparty/benchmark/CONTRIBUTORS
 create mode 100644 3rdparty/benchmark/LICENSE
 create mode 100644 3rdparty/benchmark/README.md
 create mode 100644 3rdparty/benchmark/WORKSPACE
 create mode 100644 3rdparty/benchmark/_config.yml
 create mode 100644 3rdparty/benchmark/appveyor.yml
 create mode 100644 3rdparty/benchmark/bindings/python/BUILD
 create mode 100644 3rdparty/benchmark/bindings/python/build_defs.bzl
 create mode 100644 3rdparty/benchmark/bindings/python/google_benchmark/BUILD
 create mode 100644 3rdparty/benchmark/bindings/python/google_benchmark/__init__.py
 create mode 100644 3rdparty/benchmark/bindings/python/google_benchmark/benchmark.cc
 create mode 100644 3rdparty/benchmark/bindings/python/google_benchmark/example.py
 create mode 100644 3rdparty/benchmark/bindings/python/pybind11.BUILD
 create mode 100644 3rdparty/benchmark/bindings/python/python_headers.BUILD
 create mode 100644 3rdparty/benchmark/bindings/python/requirements.txt
 create mode 100644 3rdparty/benchmark/cmake/AddCXXCompilerFlag.cmake
 create mode 100644 3rdparty/benchmark/cmake/CXXFeatureCheck.cmake
 create mode 100644 3rdparty/benchmark/cmake/Config.cmake.in
 create mode 100644 3rdparty/benchmark/cmake/GetGitVersion.cmake
 create mode 100644 3rdparty/benchmark/cmake/GoogleTest.cmake
 create mode 100644 3rdparty/benchmark/cmake/GoogleTest.cmake.in
 create mode 100644 3rdparty/benchmark/cmake/Modules/FindLLVMAr.cmake
 create mode 100644 3rdparty/benchmark/cmake/Modules/FindLLVMNm.cmake
 create mode 100644 3rdparty/benchmark/cmake/Modules/FindLLVMRanLib.cmake
 create mode 100644 3rdparty/benchmark/cmake/Modules/FindPFM.cmake
 create mode 100644 3rdparty/benchmark/cmake/benchmark.pc.in
 create mode 100644 3rdparty/benchmark/cmake/gnu_posix_regex.cpp
 create mode 100644 3rdparty/benchmark/cmake/llvm-toolchain.cmake
 create mode 100644 3rdparty/benchmark/cmake/posix_regex.cpp
 create mode 100644 3rdparty/benchmark/cmake/split_list.cmake
 create mode 100644 3rdparty/benchmark/cmake/std_regex.cpp
 create mode 100644 3rdparty/benchmark/cmake/steady_clock.cpp
 create mode 100644 3rdparty/benchmark/cmake/thread_safety_attributes.cpp
 create mode 100644 3rdparty/benchmark/docs/AssemblyTests.md
 create mode 100644 3rdparty/benchmark/docs/_config.yml
 create mode 100644 3rdparty/benchmark/docs/dependencies.md
 create mode 100644 3rdparty/benchmark/docs/index.md
 create mode 100644 3rdparty/benchmark/docs/perf_counters.md
 create mode 100644 3rdparty/benchmark/docs/platform_specific_build_instructions.md
 create mode 100644 3rdparty/benchmark/docs/random_interleaving.md
 create mode 100644 3rdparty/benchmark/docs/releasing.md
 create mode 100644 3rdparty/benchmark/docs/tools.md
 create mode 100644 3rdparty/benchmark/docs/user_guide.md
 create mode 100644 3rdparty/benchmark/include/benchmark/benchmark.h
 create mode 100644 3rdparty/benchmark/requirements.txt
 create mode 100644 3rdparty/benchmark/setup.py
 create mode 100644 3rdparty/benchmark/src/CMakeLists.txt
 create mode 100644 3rdparty/benchmark/src/arraysize.h
 create mode 100644 3rdparty/benchmark/src/benchmark.cc
 create mode 100644 3rdparty/benchmark/src/benchmark_api_internal.cc
 create mode 100644 3rdparty/benchmark/src/benchmark_api_internal.h
 create mode 100644 3rdparty/benchmark/src/benchmark_main.cc
 create mode 100644 3rdparty/benchmark/src/benchmark_name.cc
 create mode 100644 3rdparty/benchmark/src/benchmark_register.cc
 create mode 100644 3rdparty/benchmark/src/benchmark_register.h
 create mode 100644 3rdparty/benchmark/src/benchmark_runner.cc
 create mode 100644 3rdparty/benchmark/src/benchmark_runner.h
 create mode 100644 3rdparty/benchmark/src/check.h
 create mode 100644 3rdparty/benchmark/src/colorprint.cc
 create mode 100644 3rdparty/benchmark/src/colorprint.h
 create mode 100644 3rdparty/benchmark/src/commandlineflags.cc
 create mode 100644 3rdparty/benchmark/src/commandlineflags.h
 create mode 100644 3rdparty/benchmark/src/complexity.cc
 create mode 100644 3rdparty/benchmark/src/complexity.h
 create mode 100644 3rdparty/benchmark/src/console_reporter.cc
 create mode 100644 3rdparty/benchmark/src/counter.cc
 create mode 100644 3rdparty/benchmark/src/counter.h
 create mode 100644 3rdparty/benchmark/src/csv_reporter.cc
 create mode 100644 3rdparty/benchmark/src/cycleclock.h
 create mode 100644 3rdparty/benchmark/src/internal_macros.h
 create mode 100644 3rdparty/benchmark/src/json_reporter.cc
 create mode 100644 3rdparty/benchmark/src/log.h
 create mode 100644 3rdparty/benchmark/src/mutex.h
 create mode 100644 3rdparty/benchmark/src/perf_counters.cc
 create mode 100644 3rdparty/benchmark/src/perf_counters.h
 create mode 100644 3rdparty/benchmark/src/re.h
 create mode 100644 3rdparty/benchmark/src/reporter.cc
 create mode 100644 3rdparty/benchmark/src/sleep.cc
 create mode 100644 3rdparty/benchmark/src/sleep.h
 create mode 100644 3rdparty/benchmark/src/statistics.cc
 create mode 100644 3rdparty/benchmark/src/statistics.h
 create mode 100644 3rdparty/benchmark/src/string_util.cc
 create mode 100644 3rdparty/benchmark/src/string_util.h
 create mode 100644 3rdparty/benchmark/src/sysinfo.cc
 create mode 100644 3rdparty/benchmark/src/thread_manager.h
 create mode 100644 3rdparty/benchmark/src/thread_timer.h
 create mode 100644 3rdparty/benchmark/src/timers.cc
 create mode 100644 3rdparty/benchmark/src/timers.h
 create mode 100644 3rdparty/benchmark/test/AssemblyTests.cmake
 create mode 100644 3rdparty/benchmark/test/BUILD
 create mode 100644 3rdparty/benchmark/test/CMakeLists.txt
 create mode 100644 3rdparty/benchmark/test/args_product_test.cc
 create mode 100644 3rdparty/benchmark/test/basic_test.cc
 create mode 100644 3rdparty/benchmark/test/benchmark_gtest.cc
 create mode 100644 3rdparty/benchmark/test/benchmark_name_gtest.cc
 create mode 100644 3rdparty/benchmark/test/benchmark_random_interleaving_gtest.cc
 create mode 100644 3rdparty/benchmark/test/benchmark_setup_teardown_test.cc
 create mode 100644 3rdparty/benchmark/test/benchmark_test.cc
 create mode 100644 3rdparty/benchmark/test/clobber_memory_assembly_test.cc
 create mode 100644 3rdparty/benchmark/test/commandlineflags_gtest.cc
 create mode 100644 3rdparty/benchmark/test/complexity_test.cc
 create mode 100644 3rdparty/benchmark/test/cxx03_test.cc
 create mode 100644 3rdparty/benchmark/test/diagnostics_test.cc
 create mode 100644 3rdparty/benchmark/test/display_aggregates_only_test.cc
 create mode 100644 3rdparty/benchmark/test/donotoptimize_assembly_test.cc
 create mode 100644 3rdparty/benchmark/test/donotoptimize_test.cc
 create mode 100644 3rdparty/benchmark/test/filter_test.cc
 create mode 100644 3rdparty/benchmark/test/fixture_test.cc
 create mode 100644 3rdparty/benchmark/test/internal_threading_test.cc
 create mode 100644 3rdparty/benchmark/test/link_main_test.cc
 create mode 100644 3rdparty/benchmark/test/map_test.cc
 create mode 100644 3rdparty/benchmark/test/memory_manager_test.cc
 create mode 100644 3rdparty/benchmark/test/multiple_ranges_test.cc
 create mode 100644 3rdparty/benchmark/test/options_test.cc
 create mode 100644 3rdparty/benchmark/test/output_test.h
 create mode 100644 3rdparty/benchmark/test/output_test_helper.cc
 create mode 100644 3rdparty/benchmark/test/perf_counters_gtest.cc
 create mode 100644 3rdparty/benchmark/test/perf_counters_test.cc
 create mode 100644 3rdparty/benchmark/test/register_benchmark_test.cc
 create mode 100644 3rdparty/benchmark/test/repetitions_test.cc
 create mode 100644 3rdparty/benchmark/test/report_aggregates_only_test.cc
 create mode 100644 3rdparty/benchmark/test/reporter_output_test.cc
 create mode 100644 3rdparty/benchmark/test/skip_with_error_test.cc
 create mode 100644 3rdparty/benchmark/test/spec_arg_test.cc
 create mode 100644 3rdparty/benchmark/test/state_assembly_test.cc
 create mode 100644 3rdparty/benchmark/test/statistics_gtest.cc
 create mode 100644 3rdparty/benchmark/test/string_util_gtest.cc
 create mode 100644 3rdparty/benchmark/test/templated_fixture_test.cc
 create mode 100644 3rdparty/benchmark/test/user_counters_tabular_test.cc
 create mode 100644 3rdparty/benchmark/test/user_counters_test.cc
 create mode 100644 3rdparty/benchmark/test/user_counters_thousands_test.cc
 create mode 100644 3rdparty/benchmark/tools/BUILD.bazel
 create mode 100644 3rdparty/benchmark/tools/compare.py
 create mode 100644 3rdparty/benchmark/tools/gbench/Inputs/test1_run1.json
 create mode 100644 3rdparty/benchmark/tools/gbench/Inputs/test1_run2.json
 create mode 100644 3rdparty/benchmark/tools/gbench/Inputs/test2_run.json
 create mode 100644 3rdparty/benchmark/tools/gbench/Inputs/test3_run0.json
 create mode 100644 3rdparty/benchmark/tools/gbench/Inputs/test3_run1.json
 create mode 100644 3rdparty/benchmark/tools/gbench/Inputs/test4_run.json
 create mode 100644 3rdparty/benchmark/tools/gbench/Inputs/test4_run0.json
 create mode 100644 3rdparty/benchmark/tools/gbench/Inputs/test4_run1.json
 create mode 100644 3rdparty/benchmark/tools/gbench/__init__.py
 create mode 100644 3rdparty/benchmark/tools/gbench/report.py
 create mode 100644 3rdparty/benchmark/tools/gbench/util.py
 create mode 100644 3rdparty/benchmark/tools/requirements.txt
 create mode 100644 3rdparty/benchmark/tools/strip_asm.py
 create mode 100644 benchmark/CMakeLists.txt

diff --git a/3rdparty/benchmark/.clang-format b/3rdparty/benchmark/.clang-format
new file mode 100644
index 00000000..e7d00fea
--- /dev/null
+++ b/3rdparty/benchmark/.clang-format
@@ -0,0 +1,5 @@
+---
+Language:        Cpp
+BasedOnStyle:  Google
+PointerAlignment: Left
+...
diff --git a/3rdparty/benchmark/.clang-tidy b/3rdparty/benchmark/.clang-tidy
new file mode 100644
index 00000000..56938a59
--- /dev/null
+++ b/3rdparty/benchmark/.clang-tidy
@@ -0,0 +1,7 @@
+---
+Checks:          'clang-analyzer-*,readability-redundant-*,performance-*'
+WarningsAsErrors: 'clang-analyzer-*,readability-redundant-*,performance-*'
+HeaderFilterRegex: '.*'
+AnalyzeTemporaryDtors: false
+FormatStyle:     none
+User:            user
diff --git a/3rdparty/benchmark/.gitignore b/3rdparty/benchmark/.gitignore
new file mode 100644
index 00000000..704f56c2
--- /dev/null
+++ b/3rdparty/benchmark/.gitignore
@@ -0,0 +1,67 @@
+*.a
+*.so
+*.so.?*
+*.dll
+*.exe
+*.dylib
+*.cmake
+!/cmake/*.cmake
+!/test/AssemblyTests.cmake
+*~
+*.swp
+*.pyc
+__pycache__
+.DS_Store
+
+# lcov
+*.lcov
+/lcov
+
+# cmake files.
+/Testing
+CMakeCache.txt
+CMakeFiles/
+cmake_install.cmake
+
+# makefiles.
+Makefile
+
+# in-source build.
+bin/
+lib/
+/test/*_test
+
+# exuberant ctags.
+tags
+
+# YouCompleteMe configuration.
+.ycm_extra_conf.pyc
+
+# ninja generated files.
+.ninja_deps
+.ninja_log
+build.ninja
+install_manifest.txt
+rules.ninja
+
+# bazel output symlinks.
+bazel-*
+
+# out-of-source build top-level folders.
+build/
+_build/
+build*/
+
+# in-source dependencies
+/googletest/
+
+# Visual Studio 2015/2017 cache/options directory
+.vs/
+CMakeSettings.json
+
+# Visual Studio Code cache/options directory
+.vscode/
+
+# Python build stuff
+dist/
+*.egg-info*
diff --git a/3rdparty/benchmark/.travis.yml b/3rdparty/benchmark/.travis.yml
new file mode 100644
index 00000000..8cfed3d1
--- /dev/null
+++ b/3rdparty/benchmark/.travis.yml
@@ -0,0 +1,208 @@
+sudo: required
+dist: trusty
+language: cpp
+
+matrix:
+  include:
+    - compiler: gcc
+      addons:
+        apt:
+          packages:
+            - lcov
+      env: COMPILER=g++ C_COMPILER=gcc BUILD_TYPE=Coverage
+    - compiler: gcc
+      addons:
+        apt:
+          packages:
+            - g++-multilib
+            - libc6:i386
+      env:
+        - COMPILER=g++
+        - C_COMPILER=gcc
+        - BUILD_TYPE=Debug
+        - BUILD_32_BITS=ON
+        - EXTRA_FLAGS="-m32"
+    - compiler: gcc
+      addons:
+        apt:
+          packages:
+            - g++-multilib
+            - libc6:i386
+      env:
+        - COMPILER=g++
+        - C_COMPILER=gcc
+        - BUILD_TYPE=Release
+        - BUILD_32_BITS=ON
+        - EXTRA_FLAGS="-m32"
+    - compiler: gcc
+      env:
+        - INSTALL_GCC6_FROM_PPA=1
+        - COMPILER=g++-6 C_COMPILER=gcc-6  BUILD_TYPE=Debug
+        - ENABLE_SANITIZER=1
+        - EXTRA_FLAGS="-fno-omit-frame-pointer -g -O2 -fsanitize=undefined,address -fuse-ld=gold"
+    # Clang w/ libc++
+    - compiler: clang
+      dist: xenial
+      addons:
+        apt:
+          packages:
+            clang-3.8
+      env:
+        - INSTALL_GCC6_FROM_PPA=1
+        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
+        - LIBCXX_BUILD=1
+        - EXTRA_CXX_FLAGS="-stdlib=libc++"
+    - compiler: clang
+      dist: xenial
+      addons:
+        apt:
+          packages:
+            clang-3.8
+      env:
+        - INSTALL_GCC6_FROM_PPA=1
+        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Release
+        - LIBCXX_BUILD=1
+        - EXTRA_CXX_FLAGS="-stdlib=libc++"
+    # Clang w/ 32bit libc++
+    - compiler: clang
+      dist: xenial
+      addons:
+        apt:
+          packages:
+            - clang-3.8
+            - g++-multilib
+            - libc6:i386
+      env:
+        - INSTALL_GCC6_FROM_PPA=1
+        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
+        - LIBCXX_BUILD=1
+        - BUILD_32_BITS=ON
+        - EXTRA_FLAGS="-m32"
+        - EXTRA_CXX_FLAGS="-stdlib=libc++"
+    # Clang w/ 32bit libc++
+    - compiler: clang
+      dist: xenial
+      addons:
+        apt:
+          packages:
+            - clang-3.8
+            - g++-multilib
+            - libc6:i386
+      env:
+        - INSTALL_GCC6_FROM_PPA=1
+        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Release
+        - LIBCXX_BUILD=1
+        - BUILD_32_BITS=ON
+        - EXTRA_FLAGS="-m32"
+        - EXTRA_CXX_FLAGS="-stdlib=libc++"
+    # Clang w/ libc++, ASAN, UBSAN
+    - compiler: clang
+      dist: xenial
+      addons:
+        apt:
+          packages:
+            clang-3.8
+      env:
+        - INSTALL_GCC6_FROM_PPA=1
+        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
+        - LIBCXX_BUILD=1 LIBCXX_SANITIZER="Undefined;Address"
+        - ENABLE_SANITIZER=1
+        - EXTRA_FLAGS="-g -O2 -fno-omit-frame-pointer -fsanitize=undefined,address -fno-sanitize-recover=all"
+        - EXTRA_CXX_FLAGS="-stdlib=libc++"
+        - UBSAN_OPTIONS=print_stacktrace=1
+    # Clang w/ libc++ and MSAN
+    - compiler: clang
+      dist: xenial
+      addons:
+        apt:
+          packages:
+            clang-3.8
+      env:
+        - INSTALL_GCC6_FROM_PPA=1
+        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
+        - LIBCXX_BUILD=1 LIBCXX_SANITIZER=MemoryWithOrigins
+        - ENABLE_SANITIZER=1
+        - EXTRA_FLAGS="-g -O2 -fno-omit-frame-pointer -fsanitize=memory -fsanitize-memory-track-origins"
+        - EXTRA_CXX_FLAGS="-stdlib=libc++"
+    # Clang w/ libc++ and MSAN
+    - compiler: clang
+      dist: xenial
+      addons:
+        apt:
+          packages:
+            clang-3.8
+      env:
+        - INSTALL_GCC6_FROM_PPA=1
+        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=RelWithDebInfo
+        - LIBCXX_BUILD=1 LIBCXX_SANITIZER=Thread
+        - ENABLE_SANITIZER=1
+        - EXTRA_FLAGS="-g -O2 -fno-omit-frame-pointer -fsanitize=thread -fno-sanitize-recover=all"
+        - EXTRA_CXX_FLAGS="-stdlib=libc++"
+    - os: osx
+      osx_image: xcode8.3
+      compiler: clang
+      env:
+        - COMPILER=clang++
+        - BUILD_TYPE=Release
+        - BUILD_32_BITS=ON
+        - EXTRA_FLAGS="-m32"
+
+before_script:
+  - if [ -n "${LIBCXX_BUILD}" ]; then
+      source .libcxx-setup.sh;
+    fi
+  - if [ -n "${ENABLE_SANITIZER}" ]; then
+      export EXTRA_OPTIONS="-DBENCHMARK_ENABLE_ASSEMBLY_TESTS=OFF";
+    else
+      export EXTRA_OPTIONS="";
+    fi
+  - mkdir -p build && cd build
+
+before_install:
+  - if [ -z "$BUILD_32_BITS" ]; then
+      export BUILD_32_BITS=OFF && echo disabling 32 bit build;
+    fi
+  - if [ -n "${INSTALL_GCC6_FROM_PPA}" ]; then
+      sudo add-apt-repository -y "ppa:ubuntu-toolchain-r/test";
+      sudo apt-get update --option Acquire::Retries=100 --option Acquire::http::Timeout="60";
+    fi
+
+install:
+  - if [ -n "${INSTALL_GCC6_FROM_PPA}" ]; then
+      travis_wait sudo -E apt-get -yq --no-install-suggests --no-install-recommends install g++-6;
+    fi
+  - if [ "${TRAVIS_OS_NAME}" == "linux" -a "${BUILD_32_BITS}" == "OFF" ]; then
+      travis_wait sudo -E apt-get -y --no-install-suggests --no-install-recommends install llvm-3.9-tools;
+      sudo cp /usr/lib/llvm-3.9/bin/FileCheck /usr/local/bin/;
+    fi
+  - if [ "${BUILD_TYPE}" == "Coverage" -a "${TRAVIS_OS_NAME}" == "linux" ]; then
+      PATH=~/.local/bin:${PATH};
+      pip install --user --upgrade pip;
+      travis_wait pip install --user cpp-coveralls;
+    fi
+  - if [ "${C_COMPILER}" == "gcc-7" -a "${TRAVIS_OS_NAME}" == "osx" ]; then
+      rm -f /usr/local/include/c++;
+      brew update;
+      travis_wait brew install gcc@7;
+    fi
+  - if [ "${TRAVIS_OS_NAME}" == "linux" ]; then
+      sudo apt-get update -qq;
+      sudo apt-get install -qq unzip cmake3;
+      wget https://github.com/bazelbuild/bazel/releases/download/3.2.0/bazel-3.2.0-installer-linux-x86_64.sh --output-document bazel-installer.sh;
+      travis_wait sudo bash bazel-installer.sh;
+    fi
+  - if [ "${TRAVIS_OS_NAME}" == "osx" ]; then
+      curl -L -o bazel-installer.sh https://github.com/bazelbuild/bazel/releases/download/3.2.0/bazel-3.2.0-installer-darwin-x86_64.sh;
+      travis_wait sudo bash bazel-installer.sh;
+    fi
+
+script:
+  - cmake -DCMAKE_C_COMPILER=${C_COMPILER} -DCMAKE_CXX_COMPILER=${COMPILER} -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DCMAKE_C_FLAGS="${EXTRA_FLAGS}" -DCMAKE_CXX_FLAGS="${EXTRA_FLAGS} ${EXTRA_CXX_FLAGS}" -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON -DBENCHMARK_BUILD_32_BITS=${BUILD_32_BITS} ${EXTRA_OPTIONS} ..
+  - make
+  - ctest -C ${BUILD_TYPE} --output-on-failure
+  - bazel test -c dbg --define google_benchmark.have_regex=posix --announce_rc --verbose_failures --test_output=errors --keep_going //test/...
+
+after_success:
+  - if [ "${BUILD_TYPE}" == "Coverage" -a "${TRAVIS_OS_NAME}" == "linux" ]; then
+      coveralls --include src --include include --gcov-options '\-lp' --root .. --build-root .;
+    fi
diff --git a/3rdparty/benchmark/.ycm_extra_conf.py b/3rdparty/benchmark/.ycm_extra_conf.py
new file mode 100644
index 00000000..5649ddcc
--- /dev/null
+++ b/3rdparty/benchmark/.ycm_extra_conf.py
@@ -0,0 +1,115 @@
+import os
+import ycm_core
+
+# These are the compilation flags that will be used in case there's no
+# compilation database set (by default, one is not set).
+# CHANGE THIS LIST OF FLAGS. YES, THIS IS THE DROID YOU HAVE BEEN LOOKING FOR.
+flags = [
+'-Wall',
+'-Werror',
+'-pedantic-errors',
+'-std=c++0x',
+'-fno-strict-aliasing',
+'-O3',
+'-DNDEBUG',
+# ...and the same thing goes for the magic -x option which specifies the
+# language that the files to be compiled are written in. This is mostly
+# relevant for c++ headers.
+# For a C project, you would set this to 'c' instead of 'c++'.
+'-x', 'c++',
+'-I', 'include',
+'-isystem', '/usr/include',
+'-isystem', '/usr/local/include',
+]
+
+
+# Set this to the absolute path to the folder (NOT the file!) containing the
+# compile_commands.json file to use that instead of 'flags'. See here for
+# more details: http://clang.llvm.org/docs/JSONCompilationDatabase.html
+#
+# Most projects will NOT need to set this to anything; you can just change the
+# 'flags' list of compilation flags. Notice that YCM itself uses that approach.
+compilation_database_folder = ''
+
+if os.path.exists( compilation_database_folder ):
+  database = ycm_core.CompilationDatabase( compilation_database_folder )
+else:
+  database = None
+
+SOURCE_EXTENSIONS = [ '.cc' ]
+
+def DirectoryOfThisScript():
+  return os.path.dirname( os.path.abspath( __file__ ) )
+
+
+def MakeRelativePathsInFlagsAbsolute( flags, working_directory ):
+  if not working_directory:
+    return list( flags )
+  new_flags = []
+  make_next_absolute = False
+  path_flags = [ '-isystem', '-I', '-iquote', '--sysroot=' ]
+  for flag in flags:
+    new_flag = flag
+
+    if make_next_absolute:
+      make_next_absolute = False
+      if not flag.startswith( '/' ):
+        new_flag = os.path.join( working_directory, flag )
+
+    for path_flag in path_flags:
+      if flag == path_flag:
+        make_next_absolute = True
+        break
+
+      if flag.startswith( path_flag ):
+        path = flag[ len( path_flag ): ]
+        new_flag = path_flag + os.path.join( working_directory, path )
+        break
+
+    if new_flag:
+      new_flags.append( new_flag )
+  return new_flags
+
+
+def IsHeaderFile( filename ):
+  extension = os.path.splitext( filename )[ 1 ]
+  return extension in [ '.h', '.hxx', '.hpp', '.hh' ]
+
+
+def GetCompilationInfoForFile( filename ):
+  # The compilation_commands.json file generated by CMake does not have entries
+  # for header files. So we do our best by asking the db for flags for a
+  # corresponding source file, if any. If one exists, the flags for that file
+  # should be good enough.
+  if IsHeaderFile( filename ):
+    basename = os.path.splitext( filename )[ 0 ]
+    for extension in SOURCE_EXTENSIONS:
+      replacement_file = basename + extension
+      if os.path.exists( replacement_file ):
+        compilation_info = database.GetCompilationInfoForFile(
+          replacement_file )
+        if compilation_info.compiler_flags_:
+          return compilation_info
+    return None
+  return database.GetCompilationInfoForFile( filename )
+
+
+def FlagsForFile( filename, **kwargs ):
+  if database:
+    # Bear in mind that compilation_info.compiler_flags_ does NOT return a
+    # python list, but a "list-like" StringVec object
+    compilation_info = GetCompilationInfoForFile( filename )
+    if not compilation_info:
+      return None
+
+    final_flags = MakeRelativePathsInFlagsAbsolute(
+      compilation_info.compiler_flags_,
+      compilation_info.compiler_working_dir_ )
+  else:
+    relative_to = DirectoryOfThisScript()
+    final_flags = MakeRelativePathsInFlagsAbsolute( flags, relative_to )
+
+  return {
+    'flags': final_flags,
+    'do_cache': True
+  }
diff --git a/3rdparty/benchmark/AUTHORS b/3rdparty/benchmark/AUTHORS
new file mode 100644
index 00000000..2b8072e0
--- /dev/null
+++ b/3rdparty/benchmark/AUTHORS
@@ -0,0 +1,63 @@
+# This is the official list of benchmark authors for copyright purposes.
+# This file is distinct from the CONTRIBUTORS files.
+# See the latter for an explanation.
+#
+# Names should be added to this file as:
+#	Name or Organization <email address>
+# The email address is not required for organizations.
+#
+# Please keep the list sorted.
+
+Albert Pretorius <pretoalb@gmail.com>
+Alex Steele <steeleal123@gmail.com>
+Andriy Berestovskyy <berestovskyy@gmail.com>
+Arne Beer <arne@twobeer.de>
+Carto
+Christian Wassermann <christian_wassermann@web.de>
+Christopher Seymour <chris.j.seymour@hotmail.com>
+Colin Braley <braley.colin@gmail.com>
+Daniel Harvey <danielharvey458@gmail.com>
+David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
+Deniz Evrenci <denizevrenci@gmail.com>
+Dirac Research 
+Dominik Czarnota <dominik.b.czarnota@gmail.com>
+Dominik Korman <kormandominik@gmail.com>
+Donald Aingworth <donalds_junk_mail@yahoo.com>
+Eric Backus <eric_backus@alum.mit.edu>
+Eric Fiselier <eric@efcs.ca>
+Eugene Zhuk <eugene.zhuk@gmail.com>
+Evgeny Safronov <division494@gmail.com>
+Federico Ficarelli <federico.ficarelli@gmail.com>
+Felix Homann <linuxaudio@showlabor.de>
+Gergő Szitár <szitar.gergo@gmail.com>
+Google Inc.
+International Business Machines Corporation
+Ismael Jimenez Martinez <ismael.jimenez.martinez@gmail.com>
+Jern-Kuan Leong <jernkuan@gmail.com>
+JianXiong Zhou <zhoujianxiong2@gmail.com>
+Joao Paulo Magalhaes <joaoppmagalhaes@gmail.com>
+Jordan Williams <jwillikers@protonmail.com>
+Jussi Knuuttila <jussi.knuuttila@gmail.com>
+Kaito Udagawa <umireon@gmail.com>
+Kishan Kumar <kumar.kishan@outlook.com>
+Lei Xu <eddyxu@gmail.com>
+Matt Clarkson <mattyclarkson@gmail.com>
+Maxim Vafin <maxvafin@gmail.com>
+MongoDB Inc.
+Nick Hutchinson <nshutchinson@gmail.com>
+Norman Heino <norman.heino@gmail.com>
+Oleksandr Sochka <sasha.sochka@gmail.com>
+Ori Livneh <ori.livneh@gmail.com>
+Paul Redmond <paul.redmond@gmail.com>
+Radoslav Yovchev <radoslav.tm@gmail.com>
+Roman Lebedev <lebedev.ri@gmail.com>
+Sayan Bhattacharjee <aero.sayan@gmail.com>
+Shuo Chen <chenshuo@chenshuo.com>
+Staffan Tjernstrom <staffantj@gmail.com>
+Steinar H. Gunderson <sgunderson@bigfoot.com>
+Stripe, Inc.
+Tobias Schmidt <tobias.schmidt@in.tum.de>
+Yixuan Qiu <yixuanq@gmail.com>
+Yusuke Suzuki <utatane.tea@gmail.com>
+Zbigniew Skowron <zbychs@gmail.com>
+Min-Yih Hsu <yihshyng223@gmail.com>
diff --git a/3rdparty/benchmark/BUILD.bazel b/3rdparty/benchmark/BUILD.bazel
new file mode 100644
index 00000000..904c691d
--- /dev/null
+++ b/3rdparty/benchmark/BUILD.bazel
@@ -0,0 +1,52 @@
+licenses(["notice"])
+
+config_setting(
+    name = "qnx",
+    constraint_values = ["@platforms//os:qnx"],
+    values = {
+        "cpu": "x64_qnx",
+    },
+    visibility = [":__subpackages__"],
+)
+
+config_setting(
+    name = "windows",
+    constraint_values = ["@platforms//os:windows"],
+    values = {
+        "cpu": "x64_windows",
+    },
+    visibility = [":__subpackages__"],
+)
+
+cc_library(
+    name = "benchmark",
+    srcs = glob(
+        [
+            "src/*.cc",
+            "src/*.h",
+        ],
+        exclude = ["src/benchmark_main.cc"],
+    ),
+    hdrs = ["include/benchmark/benchmark.h"],
+    linkopts = select({
+        ":windows": ["-DEFAULTLIB:shlwapi.lib"],
+        "//conditions:default": ["-pthread"],
+    }),
+    strip_include_prefix = "include",
+    visibility = ["//visibility:public"],
+)
+
+cc_library(
+    name = "benchmark_main",
+    srcs = ["src/benchmark_main.cc"],
+    hdrs = ["include/benchmark/benchmark.h"],
+    strip_include_prefix = "include",
+    visibility = ["//visibility:public"],
+    deps = [":benchmark"],
+)
+
+cc_library(
+    name = "benchmark_internal_headers",
+    hdrs = glob(["src/*.h"]),
+    visibility = ["//test:__pkg__"],
+)
diff --git a/3rdparty/benchmark/CMakeLists.txt b/3rdparty/benchmark/CMakeLists.txt
new file mode 100644
index 00000000..b8852e4c
--- /dev/null
+++ b/3rdparty/benchmark/CMakeLists.txt
@@ -0,0 +1,342 @@
+cmake_minimum_required (VERSION 3.5.1)
+
+foreach(p
+    CMP0048 # OK to clear PROJECT_VERSION on project()
+    CMP0054 # CMake 3.1
+    CMP0056 # export EXE_LINKER_FLAGS to try_run
+    CMP0057 # Support no if() IN_LIST operator
+    CMP0063 # Honor visibility properties for all targets
+    CMP0077 # Allow option() overrides in importing projects
+    )
+  if(POLICY ${p})
+    cmake_policy(SET ${p} NEW)
+  endif()
+endforeach()
+
+project (benchmark VERSION 1.6.1 LANGUAGES CXX)
+
+option(BENCHMARK_ENABLE_TESTING "Enable testing of the benchmark library." ON)
+option(BENCHMARK_ENABLE_EXCEPTIONS "Enable the use of exceptions in the benchmark library." ON)
+option(BENCHMARK_ENABLE_LTO "Enable link time optimisation of the benchmark library." OFF)
+option(BENCHMARK_USE_LIBCXX "Build and test using libc++ as the standard library." OFF)
+option(BENCHMARK_ENABLE_WERROR "Build Release candidates with -Werror." ON)
+option(BENCHMARK_FORCE_WERROR "Build Release candidates with -Werror regardless of compiler issues." OFF)
+
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "PGI")
+  # PGC++ maybe reporting false positives.
+  set(BENCHMARK_ENABLE_WERROR OFF)
+endif()
+if(BENCHMARK_FORCE_WERROR)
+  set(BENCHMARK_ENABLE_WERROR ON)
+endif(BENCHMARK_FORCE_WERROR)
+
+if(NOT MSVC)
+  option(BENCHMARK_BUILD_32_BITS "Build a 32 bit version of the library." OFF)
+else()
+  set(BENCHMARK_BUILD_32_BITS OFF CACHE BOOL "Build a 32 bit version of the library - unsupported when using MSVC)" FORCE)
+endif()
+option(BENCHMARK_ENABLE_INSTALL "Enable installation of benchmark. (Projects embedding benchmark may want to turn this OFF.)" ON)
+option(BENCHMARK_ENABLE_DOXYGEN "Build documentation with Doxygen." OFF)
+option(BENCHMARK_INSTALL_DOCS "Enable installation of documentation." ON)
+
+# Allow unmet dependencies to be met using CMake's ExternalProject mechanics, which
+# may require downloading the source code.
+option(BENCHMARK_DOWNLOAD_DEPENDENCIES "Allow the downloading and in-tree building of unmet dependencies" OFF)
+
+# This option can be used to disable building and running unit tests which depend on gtest
+# in cases where it is not possible to build or find a valid version of gtest.
+option(BENCHMARK_ENABLE_GTEST_TESTS "Enable building the unit tests which depend on gtest" ON)
+option(BENCHMARK_USE_BUNDLED_GTEST "Use bundled GoogleTest. If disabled, the find_package(GTest) will be used." ON)
+
+option(BENCHMARK_ENABLE_LIBPFM "Enable performance counters provided by libpfm" OFF)
+
+set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
+if(MSVC)
+    # As of CMake 3.18, CMAKE_SYSTEM_PROCESSOR is not set properly for MSVC and
+    # cross-compilation (e.g. Host=x86_64, target=aarch64) requires using the
+    # undocumented, but working variable.
+    # See https://gitlab.kitware.com/cmake/cmake/-/issues/15170
+    set(CMAKE_SYSTEM_PROCESSOR ${MSVC_CXX_ARCHITECTURE_ID})
+    if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "ARM")
+      set(CMAKE_CROSSCOMPILING TRUE)
+    endif()
+endif()
+
+set(ENABLE_ASSEMBLY_TESTS_DEFAULT OFF)
+function(should_enable_assembly_tests)
+  if(CMAKE_BUILD_TYPE)
+    string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
+    if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage")
+      # FIXME: The --coverage flag needs to be removed when building assembly
+      # tests for this to work.
+      return()
+    endif()
+  endif()
+  if (MSVC)
+    return()
+  elseif(NOT CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64")
+    return()
+  elseif(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
+    # FIXME: Make these work on 32 bit builds
+    return()
+  elseif(BENCHMARK_BUILD_32_BITS)
+     # FIXME: Make these work on 32 bit builds
+    return()
+  endif()
+  find_program(LLVM_FILECHECK_EXE FileCheck)
+  if (LLVM_FILECHECK_EXE)
+    set(LLVM_FILECHECK_EXE "${LLVM_FILECHECK_EXE}" CACHE PATH "llvm filecheck" FORCE)
+    message(STATUS "LLVM FileCheck Found: ${LLVM_FILECHECK_EXE}")
+  else()
+    message(STATUS "Failed to find LLVM FileCheck")
+    return()
+  endif()
+  set(ENABLE_ASSEMBLY_TESTS_DEFAULT ON PARENT_SCOPE)
+endfunction()
+should_enable_assembly_tests()
+
+# This option disables the building and running of the assembly verification tests
+option(BENCHMARK_ENABLE_ASSEMBLY_TESTS "Enable building and running the assembly tests"
+    ${ENABLE_ASSEMBLY_TESTS_DEFAULT})
+
+# Make sure we can import out CMake functions
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+
+
+# Read the git tags to determine the project version
+include(GetGitVersion)
+get_git_version(GIT_VERSION)
+
+# If no git version can be determined, use the version
+# from the project() command
+if ("${GIT_VERSION}" STREQUAL "0.0.0")
+  set(VERSION "${benchmark_VERSION}")
+else()
+  set(VERSION "${GIT_VERSION}")
+endif()
+# Tell the user what versions we are using
+message(STATUS "Version: ${VERSION}")
+
+# The version of the libraries
+set(GENERIC_LIB_VERSION ${VERSION})
+string(SUBSTRING ${VERSION} 0 1 GENERIC_LIB_SOVERSION)
+
+# Import our CMake modules
+include(CheckCXXCompilerFlag)
+include(AddCXXCompilerFlag)
+include(CXXFeatureCheck)
+include(CheckLibraryExists)
+
+check_library_exists(rt shm_open "" HAVE_LIB_RT)
+
+if (BENCHMARK_BUILD_32_BITS)
+  add_required_cxx_compiler_flag(-m32)
+endif()
+
+if (MSVC)
+  # Turn compiler warnings up to 11
+  string(REGEX REPLACE "[-/]W[1-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
+  add_definitions(-D_CRT_SECURE_NO_WARNINGS)
+
+  if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
+    add_cxx_compiler_flag(-EHs-)
+    add_cxx_compiler_flag(-EHa-)
+    add_definitions(-D_HAS_EXCEPTIONS=0)
+  endif()
+  # Link time optimisation
+  if (BENCHMARK_ENABLE_LTO)
+    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /GL")
+    set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "${CMAKE_STATIC_LINKER_FLAGS_RELEASE} /LTCG")
+    set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG")
+    set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG")
+
+    set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /GL")
+    string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO}")
+    set(CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
+    string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO}")
+    set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
+    string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}")
+    set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
+
+    set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} /GL")
+    set(CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL "${CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL} /LTCG")
+    set(CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL "${CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL} /LTCG")
+    set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL} /LTCG")
+  endif()
+else()
+  # Try and enable C++11. Don't use C++14 because it doesn't work in some
+  # configurations.
+  add_cxx_compiler_flag(-std=c++11)
+  if (NOT HAVE_CXX_FLAG_STD_CXX11)
+    add_cxx_compiler_flag(-std=c++0x)
+  endif()
+
+  # Turn compiler warnings up to 11
+  add_cxx_compiler_flag(-Wall)
+  add_cxx_compiler_flag(-Wextra)
+  add_cxx_compiler_flag(-Wshadow)
+  if(BENCHMARK_ENABLE_WERROR)
+      add_cxx_compiler_flag(-Werror RELEASE)
+      add_cxx_compiler_flag(-Werror RELWITHDEBINFO)
+      add_cxx_compiler_flag(-Werror MINSIZEREL)
+  endif()
+  if (NOT BENCHMARK_ENABLE_TESTING)
+    # Disable warning when compiling tests as gtest does not use 'override'.
+    add_cxx_compiler_flag(-Wsuggest-override)
+  endif()
+  add_cxx_compiler_flag(-pedantic)
+  add_cxx_compiler_flag(-pedantic-errors)
+  add_cxx_compiler_flag(-Wshorten-64-to-32)
+  add_cxx_compiler_flag(-fstrict-aliasing)
+  # Disable warnings regarding deprecated parts of the library while building
+  # and testing those parts of the library.
+  add_cxx_compiler_flag(-Wno-deprecated-declarations)
+  if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
+    # Intel silently ignores '-Wno-deprecated-declarations',
+    # warning no. 1786 must be explicitly disabled.
+    # See #631 for rationale.
+    add_cxx_compiler_flag(-wd1786)
+  endif()
+  # Disable deprecation warnings for release builds (when -Werror is enabled).
+  if(BENCHMARK_ENABLE_WERROR)
+      add_cxx_compiler_flag(-Wno-deprecated RELEASE)
+      add_cxx_compiler_flag(-Wno-deprecated RELWITHDEBINFO)
+      add_cxx_compiler_flag(-Wno-deprecated MINSIZEREL)
+  endif()
+  if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
+    add_cxx_compiler_flag(-fno-exceptions)
+  endif()
+
+  if (HAVE_CXX_FLAG_FSTRICT_ALIASING)
+    if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel") #ICC17u2: Many false positives for Wstrict-aliasing
+      add_cxx_compiler_flag(-Wstrict-aliasing)
+    endif()
+  endif()
+  # ICC17u2: overloaded virtual function "benchmark::Fixture::SetUp" is only partially overridden
+  # (because of deprecated overload)
+  add_cxx_compiler_flag(-wd654)
+  add_cxx_compiler_flag(-Wthread-safety)
+  if (HAVE_CXX_FLAG_WTHREAD_SAFETY)
+    cxx_feature_check(THREAD_SAFETY_ATTRIBUTES)
+  endif()
+
+  # On most UNIX like platforms g++ and clang++ define _GNU_SOURCE as a
+  # predefined macro, which turns on all of the wonderful libc extensions.
+  # However g++ doesn't do this in Cygwin so we have to define it ourselfs
+  # since we depend on GNU/POSIX/BSD extensions.
+  if (CYGWIN)
+    add_definitions(-D_GNU_SOURCE=1)
+  endif()
+
+  if (QNXNTO)
+    add_definitions(-D_QNX_SOURCE)
+  endif()
+
+  # Link time optimisation
+  if (BENCHMARK_ENABLE_LTO)
+    add_cxx_compiler_flag(-flto)
+    add_cxx_compiler_flag(-Wno-lto-type-mismatch)
+    if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+      find_program(GCC_AR gcc-ar)
+      if (GCC_AR)
+        set(CMAKE_AR ${GCC_AR})
+      endif()
+      find_program(GCC_RANLIB gcc-ranlib)
+      if (GCC_RANLIB)
+        set(CMAKE_RANLIB ${GCC_RANLIB})
+      endif()
+    elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
+      include(llvm-toolchain)
+    endif()
+  endif()
+
+  # Coverage build type
+  set(BENCHMARK_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_DEBUG}"
+    CACHE STRING "Flags used by the C++ compiler during coverage builds."
+    FORCE)
+  set(BENCHMARK_EXE_LINKER_FLAGS_COVERAGE "${CMAKE_EXE_LINKER_FLAGS_DEBUG}"
+    CACHE STRING "Flags used for linking binaries during coverage builds."
+    FORCE)
+  set(BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}"
+    CACHE STRING "Flags used by the shared libraries linker during coverage builds."
+    FORCE)
+  mark_as_advanced(
+    BENCHMARK_CXX_FLAGS_COVERAGE
+    BENCHMARK_EXE_LINKER_FLAGS_COVERAGE
+    BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE)
+  set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING
+    "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel Coverage.")
+  add_cxx_compiler_flag(--coverage COVERAGE)
+endif()
+
+if (BENCHMARK_USE_LIBCXX)
+  if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
+    add_cxx_compiler_flag(-stdlib=libc++)
+  elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR
+          "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
+    add_cxx_compiler_flag(-nostdinc++)
+    message(WARNING "libc++ header path must be manually specified using CMAKE_CXX_FLAGS")
+    # Adding -nodefaultlibs directly to CMAKE_<TYPE>_LINKER_FLAGS will break
+    # configuration checks such as 'find_package(Threads)'
+    list(APPEND BENCHMARK_CXX_LINKER_FLAGS -nodefaultlibs)
+    # -lc++ cannot be added directly to CMAKE_<TYPE>_LINKER_FLAGS because
+    # linker flags appear before all linker inputs and -lc++ must appear after.
+    list(APPEND BENCHMARK_CXX_LIBRARIES c++)
+  else()
+    message(FATAL_ERROR "-DBENCHMARK_USE_LIBCXX:BOOL=ON is not supported for compiler")
+  endif()
+endif(BENCHMARK_USE_LIBCXX)
+
+set(EXTRA_CXX_FLAGS "")
+if (WIN32 AND "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
+  # Clang on Windows fails to compile the regex feature check under C++11
+  set(EXTRA_CXX_FLAGS "-DCMAKE_CXX_STANDARD=14")
+endif()
+
+# C++ feature checks
+# Determine the correct regular expression engine to use
+cxx_feature_check(STD_REGEX ${EXTRA_CXX_FLAGS})
+cxx_feature_check(GNU_POSIX_REGEX ${EXTRA_CXX_FLAGS})
+cxx_feature_check(POSIX_REGEX ${EXTRA_CXX_FLAGS})
+if(NOT HAVE_STD_REGEX AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
+  message(FATAL_ERROR "Failed to determine the source files for the regular expression backend")
+endif()
+if (NOT BENCHMARK_ENABLE_EXCEPTIONS AND HAVE_STD_REGEX
+        AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
+  message(WARNING "Using std::regex with exceptions disabled is not fully supported")
+endif()
+
+cxx_feature_check(STEADY_CLOCK)
+# Ensure we have pthreads
+set(THREADS_PREFER_PTHREAD_FLAG ON)
+find_package(Threads REQUIRED)
+
+if (BENCHMARK_ENABLE_LIBPFM)
+  find_package(PFM)
+endif()
+
+# Set up directories
+include_directories(${PROJECT_SOURCE_DIR}/include)
+
+# Build the targets
+add_subdirectory(src)
+
+if (BENCHMARK_ENABLE_TESTING)
+  enable_testing()
+  if (BENCHMARK_ENABLE_GTEST_TESTS AND
+      NOT (TARGET gtest AND TARGET gtest_main AND
+           TARGET gmock AND TARGET gmock_main))
+    if (BENCHMARK_USE_BUNDLED_GTEST)
+      include(GoogleTest)
+    else()
+      find_package(GTest CONFIG REQUIRED)
+      add_library(gtest ALIAS GTest::gtest)
+      add_library(gtest_main ALIAS GTest::gtest_main)
+      add_library(gmock ALIAS GTest::gmock)
+      add_library(gmock_main ALIAS GTest::gmock_main)
+    endif()
+  endif()
+  add_subdirectory(test)
+endif()
diff --git a/3rdparty/benchmark/CONTRIBUTING.md b/3rdparty/benchmark/CONTRIBUTING.md
new file mode 100644
index 00000000..43de4c9d
--- /dev/null
+++ b/3rdparty/benchmark/CONTRIBUTING.md
@@ -0,0 +1,58 @@
+# How to contribute #
+
+We'd love to accept your patches and contributions to this project.  There are
+a just a few small guidelines you need to follow.
+
+
+## Contributor License Agreement ##
+
+Contributions to any Google project must be accompanied by a Contributor
+License Agreement.  This is not a copyright **assignment**, it simply gives
+Google permission to use and redistribute your contributions as part of the
+project.
+
+  * If you are an individual writing original source code and you're sure you
+    own the intellectual property, then you'll need to sign an [individual
+    CLA][].
+
+  * If you work for a company that wants to allow you to contribute your work,
+    then you'll need to sign a [corporate CLA][].
+
+You generally only need to submit a CLA once, so if you've already submitted
+one (even if it was for a different project), you probably don't need to do it
+again.
+
+[individual CLA]: https://developers.google.com/open-source/cla/individual
+[corporate CLA]: https://developers.google.com/open-source/cla/corporate
+
+Once your CLA is submitted (or if you already submitted one for
+another Google project), make a commit adding yourself to the
+[AUTHORS][] and [CONTRIBUTORS][] files. This commit can be part
+of your first [pull request][].
+
+[AUTHORS]: AUTHORS
+[CONTRIBUTORS]: CONTRIBUTORS
+
+
+## Submitting a patch ##
+
+  1. It's generally best to start by opening a new issue describing the bug or
+     feature you're intending to fix.  Even if you think it's relatively minor,
+     it's helpful to know what people are working on.  Mention in the initial
+     issue that you are planning to work on that bug or feature so that it can
+     be assigned to you.
+
+  1. Follow the normal process of [forking][] the project, and setup a new
+     branch to work in.  It's important that each group of changes be done in
+     separate branches in order to ensure that a pull request only includes the
+     commits related to that bug or feature.
+
+  1. Do your best to have [well-formed commit messages][] for each change.
+     This provides consistency throughout the project, and ensures that commit
+     messages are able to be formatted properly by various git tools.
+
+  1. Finally, push the commits to your fork and submit a [pull request][].
+
+[forking]: https://help.github.com/articles/fork-a-repo
+[well-formed commit messages]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html
+[pull request]: https://help.github.com/articles/creating-a-pull-request
diff --git a/3rdparty/benchmark/CONTRIBUTORS b/3rdparty/benchmark/CONTRIBUTORS
new file mode 100644
index 00000000..651fbeaf
--- /dev/null
+++ b/3rdparty/benchmark/CONTRIBUTORS
@@ -0,0 +1,87 @@
+# People who have agreed to one of the CLAs and can contribute patches.
+# The AUTHORS file lists the copyright holders; this file
+# lists people.  For example, Google employees are listed here
+# but not in AUTHORS, because Google holds the copyright.
+#
+# Names should be added to this file only after verifying that
+# the individual or the individual's organization has agreed to
+# the appropriate Contributor License Agreement, found here:
+#
+# https://developers.google.com/open-source/cla/individual
+# https://developers.google.com/open-source/cla/corporate
+#
+# The agreement for individuals can be filled out on the web.
+#
+# When adding J Random Contributor's name to this file,
+# either J's name or J's organization's name should be
+# added to the AUTHORS file, depending on whether the
+# individual or corporate CLA was used.
+#
+# Names should be added to this file as:
+#     Name <email address>
+#
+# Please keep the list sorted.
+
+Abhina Sreeskantharajan <abhina.sreeskantharajan@ibm.com>
+Albert Pretorius <pretoalb@gmail.com>
+Alex Steele <steelal123@gmail.com>
+Andriy Berestovskyy <berestovskyy@gmail.com>
+Arne Beer <arne@twobeer.de>
+Billy Robert O'Neal III <billy.oneal@gmail.com> <bion@microsoft.com>
+Chris Kennelly <ckennelly@google.com> <ckennelly@ckennelly.com>
+Christian Wassermann <christian_wassermann@web.de>
+Christopher Seymour <chris.j.seymour@hotmail.com>
+Colin Braley <braley.colin@gmail.com>
+Cyrille Faucheux <cyrille.faucheux@gmail.com>
+Daniel Harvey <danielharvey458@gmail.com>
+David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
+Deniz Evrenci <denizevrenci@gmail.com>
+Dominic Hamon <dma@stripysock.com> <dominic@google.com>
+Dominik Czarnota <dominik.b.czarnota@gmail.com>
+Dominik Korman <kormandominik@gmail.com>
+Donald Aingworth <donalds_junk_mail@yahoo.com>
+Eric Backus <eric_backus@alum.mit.edu>
+Eric Fiselier <eric@efcs.ca>
+Eugene Zhuk <eugene.zhuk@gmail.com>
+Evgeny Safronov <division494@gmail.com>
+Fanbo Meng <fanbo.meng@ibm.com>
+Federico Ficarelli <federico.ficarelli@gmail.com>
+Felix Homann <linuxaudio@showlabor.de>
+Geoffrey Martin-Noble <gcmn@google.com> <gmngeoffrey@gmail.com>
+Gergő Szitár <szitar.gergo@gmail.com>
+Hannes Hauswedell <h2@fsfe.org>
+Ismael Jimenez Martinez <ismael.jimenez.martinez@gmail.com>
+Jern-Kuan Leong <jernkuan@gmail.com>
+JianXiong Zhou <zhoujianxiong2@gmail.com>
+Joao Paulo Magalhaes <joaoppmagalhaes@gmail.com>
+John Millikin <jmillikin@stripe.com>
+Jordan Williams <jwillikers@protonmail.com>
+Jussi Knuuttila <jussi.knuuttila@gmail.com>
+Kai Wolf <kai.wolf@gmail.com>
+Kaito Udagawa <umireon@gmail.com>
+Kishan Kumar <kumar.kishan@outlook.com>
+Lei Xu <eddyxu@gmail.com>
+Matt Clarkson <mattyclarkson@gmail.com>
+Maxim Vafin <maxvafin@gmail.com>
+Nick Hutchinson <nshutchinson@gmail.com>
+Norman Heino <norman.heino@gmail.com>
+Oleksandr Sochka <sasha.sochka@gmail.com>
+Ori Livneh <ori.livneh@gmail.com>
+Pascal Leroy <phl@google.com>
+Paul Redmond <paul.redmond@gmail.com>
+Pierre Phaneuf <pphaneuf@google.com>
+Radoslav Yovchev <radoslav.tm@gmail.com>
+Raul Marin <rmrodriguez@cartodb.com>
+Ray Glover <ray.glover@uk.ibm.com>
+Robert Guo <robert.guo@mongodb.com>
+Roman Lebedev <lebedev.ri@gmail.com>
+Sayan Bhattacharjee <aero.sayan@gmail.com>
+Shuo Chen <chenshuo@chenshuo.com>
+Steven Wan <wan.yu@ibm.com>
+Tobias Schmidt <tobias.schmidt@in.tum.de>
+Tobias Ulvgård <tobias.ulvgard@dirac.se>
+Tom Madams <tom.ej.madams@gmail.com> <tmadams@google.com>
+Yixuan Qiu <yixuanq@gmail.com>
+Yusuke Suzuki <utatane.tea@gmail.com>
+Zbigniew Skowron <zbychs@gmail.com>
+Min-Yih Hsu <yihshyng223@gmail.com>
diff --git a/3rdparty/benchmark/LICENSE b/3rdparty/benchmark/LICENSE
new file mode 100644
index 00000000..d6456956
--- /dev/null
+++ b/3rdparty/benchmark/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
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diff --git a/3rdparty/benchmark/README.md b/3rdparty/benchmark/README.md
new file mode 100644
index 00000000..7b81d960
--- /dev/null
+++ b/3rdparty/benchmark/README.md
@@ -0,0 +1,216 @@
+# Benchmark
+
+[![build-and-test](https://github.com/google/benchmark/workflows/build-and-test/badge.svg)](https://github.com/google/benchmark/actions?query=workflow%3Abuild-and-test)
+[![bazel](https://github.com/google/benchmark/actions/workflows/bazel.yml/badge.svg)](https://github.com/google/benchmark/actions/workflows/bazel.yml)
+[![pylint](https://github.com/google/benchmark/workflows/pylint/badge.svg)](https://github.com/google/benchmark/actions?query=workflow%3Apylint)
+[![test-bindings](https://github.com/google/benchmark/workflows/test-bindings/badge.svg)](https://github.com/google/benchmark/actions?query=workflow%3Atest-bindings)
+
+[![Build Status](https://travis-ci.org/google/benchmark.svg?branch=master)](https://travis-ci.org/google/benchmark)
+[![Coverage Status](https://coveralls.io/repos/google/benchmark/badge.svg)](https://coveralls.io/r/google/benchmark)
+
+
+A library to benchmark code snippets, similar to unit tests. Example:
+
+```c++
+#include <benchmark/benchmark.h>
+
+static void BM_SomeFunction(benchmark::State& state) {
+  // Perform setup here
+  for (auto _ : state) {
+    // This code gets timed
+    SomeFunction();
+  }
+}
+// Register the function as a benchmark
+BENCHMARK(BM_SomeFunction);
+// Run the benchmark
+BENCHMARK_MAIN();
+```
+
+## Getting Started
+
+To get started, see [Requirements](#requirements) and
+[Installation](#installation). See [Usage](#usage) for a full example and the
+[User Guide](docs/user_guide.md) for a more comprehensive feature overview.
+
+It may also help to read the [Google Test documentation](https://github.com/google/googletest/blob/master/docs/primer.md)
+as some of the structural aspects of the APIs are similar.
+
+## Resources
+
+[Discussion group](https://groups.google.com/d/forum/benchmark-discuss)
+
+IRC channels:
+* [libera](https://libera.chat) #benchmark
+
+[Additional Tooling Documentation](docs/tools.md)
+
+[Assembly Testing Documentation](docs/AssemblyTests.md)
+
+## Requirements
+
+The library can be used with C++03. However, it requires C++11 to build,
+including compiler and standard library support.
+
+The following minimum versions are required to build the library:
+
+* GCC 4.8
+* Clang 3.4
+* Visual Studio 14 2015
+* Intel 2015 Update 1
+
+See [Platform-Specific Build Instructions](docs/platform_specific_build_instructions.md).
+
+## Installation
+
+This describes the installation process using cmake. As pre-requisites, you'll
+need git and cmake installed.
+
+_See [dependencies.md](docs/dependencies.md) for more details regarding supported
+versions of build tools._
+
+```bash
+# Check out the library.
+$ git clone https://github.com/google/benchmark.git
+# Go to the library root directory
+$ cd benchmark
+# Make a build directory to place the build output.
+$ cmake -E make_directory "build"
+# Generate build system files with cmake, and download any dependencies.
+$ cmake -E chdir "build" cmake -DBENCHMARK_DOWNLOAD_DEPENDENCIES=on -DCMAKE_BUILD_TYPE=Release ../
+# or, starting with CMake 3.13, use a simpler form:
+# cmake -DCMAKE_BUILD_TYPE=Release -S . -B "build"
+# Build the library.
+$ cmake --build "build" --config Release
+```
+This builds the `benchmark` and `benchmark_main` libraries and tests.
+On a unix system, the build directory should now look something like this:
+
+```
+/benchmark
+  /build
+    /src
+      /libbenchmark.a
+      /libbenchmark_main.a
+    /test
+      ...
+```
+
+Next, you can run the tests to check the build.
+
+```bash
+$ cmake -E chdir "build" ctest --build-config Release
+```
+
+If you want to install the library globally, also run:
+
+```
+sudo cmake --build "build" --config Release --target install
+```
+
+Note that Google Benchmark requires Google Test to build and run the tests. This
+dependency can be provided two ways:
+
+* Checkout the Google Test sources into `benchmark/googletest`.
+* Otherwise, if `-DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON` is specified during
+  configuration as above, the library will automatically download and build
+  any required dependencies.
+
+If you do not wish to build and run the tests, add `-DBENCHMARK_ENABLE_GTEST_TESTS=OFF`
+to `CMAKE_ARGS`.
+
+### Debug vs Release
+
+By default, benchmark builds as a debug library. You will see a warning in the
+output when this is the case. To build it as a release library instead, add
+`-DCMAKE_BUILD_TYPE=Release` when generating the build system files, as shown
+above. The use of `--config Release` in build commands is needed to properly
+support multi-configuration tools (like Visual Studio for example) and can be
+skipped for other build systems (like Makefile).
+
+To enable link-time optimisation, also add `-DBENCHMARK_ENABLE_LTO=true` when
+generating the build system files.
+
+If you are using gcc, you might need to set `GCC_AR` and `GCC_RANLIB` cmake
+cache variables, if autodetection fails.
+
+If you are using clang, you may need to set `LLVMAR_EXECUTABLE`,
+`LLVMNM_EXECUTABLE` and `LLVMRANLIB_EXECUTABLE` cmake cache variables.
+
+### Stable and Experimental Library Versions
+
+The main branch contains the latest stable version of the benchmarking library;
+the API of which can be considered largely stable, with source breaking changes
+being made only upon the release of a new major version.
+
+Newer, experimental, features are implemented and tested on the
+[`v2` branch](https://github.com/google/benchmark/tree/v2). Users who wish
+to use, test, and provide feedback on the new features are encouraged to try
+this branch. However, this branch provides no stability guarantees and reserves
+the right to change and break the API at any time.
+
+## Usage
+
+### Basic usage
+
+Define a function that executes the code to measure, register it as a benchmark
+function using the `BENCHMARK` macro, and ensure an appropriate `main` function
+is available:
+
+```c++
+#include <benchmark/benchmark.h>
+
+static void BM_StringCreation(benchmark::State& state) {
+  for (auto _ : state)
+    std::string empty_string;
+}
+// Register the function as a benchmark
+BENCHMARK(BM_StringCreation);
+
+// Define another benchmark
+static void BM_StringCopy(benchmark::State& state) {
+  std::string x = "hello";
+  for (auto _ : state)
+    std::string copy(x);
+}
+BENCHMARK(BM_StringCopy);
+
+BENCHMARK_MAIN();
+```
+
+To run the benchmark, compile and link against the `benchmark` library
+(libbenchmark.a/.so). If you followed the build steps above, this library will 
+be under the build directory you created.
+
+```bash
+# Example on linux after running the build steps above. Assumes the
+# `benchmark` and `build` directories are under the current directory.
+$ g++ mybenchmark.cc -std=c++11 -isystem benchmark/include \
+  -Lbenchmark/build/src -lbenchmark -lpthread -o mybenchmark
+```
+
+Alternatively, link against the `benchmark_main` library and remove
+`BENCHMARK_MAIN();` above to get the same behavior.
+
+The compiled executable will run all benchmarks by default. Pass the `--help`
+flag for option information or see the [User Guide](docs/user_guide.md).
+
+### Usage with CMake
+
+If using CMake, it is recommended to link against the project-provided
+`benchmark::benchmark` and `benchmark::benchmark_main` targets using
+`target_link_libraries`.
+It is possible to use ```find_package``` to import an installed version of the
+library.
+```cmake
+find_package(benchmark REQUIRED)
+```
+Alternatively, ```add_subdirectory``` will incorporate the library directly in
+to one's CMake project.
+```cmake
+add_subdirectory(benchmark)
+```
+Either way, link to the library as follows.
+```cmake
+target_link_libraries(MyTarget benchmark::benchmark)
+```
diff --git a/3rdparty/benchmark/WORKSPACE b/3rdparty/benchmark/WORKSPACE
new file mode 100644
index 00000000..949eb98b
--- /dev/null
+++ b/3rdparty/benchmark/WORKSPACE
@@ -0,0 +1,44 @@
+workspace(name = "com_github_google_benchmark")
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
+
+http_archive(
+    name = "com_google_absl",
+    sha256 = "f41868f7a938605c92936230081175d1eae87f6ea2c248f41077c8f88316f111",
+    strip_prefix = "abseil-cpp-20200225.2",
+    urls = ["https://github.com/abseil/abseil-cpp/archive/20200225.2.tar.gz"],
+)
+
+git_repository(
+    name = "com_google_googletest",
+    remote = "https://github.com/google/googletest.git",
+    tag = "release-1.11.0",
+)
+
+http_archive(
+    name = "pybind11",
+    build_file = "@//bindings/python:pybind11.BUILD",
+    sha256 = "1eed57bc6863190e35637290f97a20c81cfe4d9090ac0a24f3bbf08f265eb71d",
+    strip_prefix = "pybind11-2.4.3",
+    urls = ["https://github.com/pybind/pybind11/archive/v2.4.3.tar.gz"],
+)
+
+new_local_repository(
+    name = "python_headers",
+    build_file = "@//bindings/python:python_headers.BUILD",
+    path = "/usr/include/python3.6",  # May be overwritten by setup.py.
+)
+
+http_archive(
+    name = "rules_python",
+    url = "https://github.com/bazelbuild/rules_python/releases/download/0.1.0/rules_python-0.1.0.tar.gz",
+    sha256 = "b6d46438523a3ec0f3cead544190ee13223a52f6a6765a29eae7b7cc24cc83a0",
+)
+
+load("@rules_python//python:pip.bzl", pip3_install="pip_install")
+
+pip3_install(
+   name = "py_deps",
+   requirements = "//:requirements.txt",
+)
diff --git a/3rdparty/benchmark/_config.yml b/3rdparty/benchmark/_config.yml
new file mode 100644
index 00000000..1fa5ff85
--- /dev/null
+++ b/3rdparty/benchmark/_config.yml
@@ -0,0 +1,2 @@
+theme: jekyll-theme-midnight
+markdown: GFM
diff --git a/3rdparty/benchmark/appveyor.yml b/3rdparty/benchmark/appveyor.yml
new file mode 100644
index 00000000..81da955f
--- /dev/null
+++ b/3rdparty/benchmark/appveyor.yml
@@ -0,0 +1,50 @@
+version: '{build}'
+
+image: Visual Studio 2017
+
+configuration:
+  - Debug
+  - Release
+
+environment:
+  matrix:
+    - compiler: msvc-15-seh
+      generator: "Visual Studio 15 2017"
+
+    - compiler: msvc-15-seh
+      generator: "Visual Studio 15 2017 Win64"
+
+    - compiler: msvc-14-seh
+      generator: "Visual Studio 14 2015"
+
+    - compiler: msvc-14-seh
+      generator: "Visual Studio 14 2015 Win64"
+
+    - compiler: gcc-5.3.0-posix
+      generator: "MinGW Makefiles"
+      cxx_path: 'C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin'
+      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+
+matrix:
+  fast_finish: true
+
+install:
+  # git bash conflicts with MinGW makefiles
+  - if "%generator%"=="MinGW Makefiles" (set "PATH=%PATH:C:\Program Files\Git\usr\bin;=%")
+  - if not "%cxx_path%"=="" (set "PATH=%PATH%;%cxx_path%")
+
+build_script:
+  - md _build -Force
+  - cd _build
+  - echo %configuration%
+  - cmake -G "%generator%" "-DCMAKE_BUILD_TYPE=%configuration%" -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON ..
+  - cmake --build . --config %configuration%
+
+test_script:
+  - ctest --build-config %configuration% --timeout 300 --output-on-failure
+
+artifacts:
+  - path: '_build/CMakeFiles/*.log'
+    name: logs
+  - path: '_build/Testing/**/*.xml'
+    name: test_results
diff --git a/3rdparty/benchmark/bindings/python/BUILD b/3rdparty/benchmark/bindings/python/BUILD
new file mode 100644
index 00000000..9559a76b
--- /dev/null
+++ b/3rdparty/benchmark/bindings/python/BUILD
@@ -0,0 +1,3 @@
+exports_files(glob(["*.BUILD"]))
+exports_files(["build_defs.bzl"])
+
diff --git a/3rdparty/benchmark/bindings/python/build_defs.bzl b/3rdparty/benchmark/bindings/python/build_defs.bzl
new file mode 100644
index 00000000..45907aaa
--- /dev/null
+++ b/3rdparty/benchmark/bindings/python/build_defs.bzl
@@ -0,0 +1,25 @@
+_SHARED_LIB_SUFFIX = {
+    "//conditions:default": ".so",
+    "//:windows": ".dll",
+}
+
+def py_extension(name, srcs, hdrs = [], copts = [], features = [], deps = []):
+    for shared_lib_suffix in _SHARED_LIB_SUFFIX.values():
+        shared_lib_name = name + shared_lib_suffix
+        native.cc_binary(
+            name = shared_lib_name,
+            linkshared = 1,
+            linkstatic = 1,
+            srcs = srcs + hdrs,
+            copts = copts,
+            features = features,
+            deps = deps,
+        )
+
+    return native.py_library(
+        name = name,
+        data = select({
+            platform: [name + shared_lib_suffix]
+            for platform, shared_lib_suffix in _SHARED_LIB_SUFFIX.items()
+        }),
+    )
diff --git a/3rdparty/benchmark/bindings/python/google_benchmark/BUILD b/3rdparty/benchmark/bindings/python/google_benchmark/BUILD
new file mode 100644
index 00000000..3c1561f4
--- /dev/null
+++ b/3rdparty/benchmark/bindings/python/google_benchmark/BUILD
@@ -0,0 +1,38 @@
+load("//bindings/python:build_defs.bzl", "py_extension")
+
+py_library(
+    name = "google_benchmark",
+    srcs = ["__init__.py"],
+    visibility = ["//visibility:public"],
+    deps = [
+        ":_benchmark",
+        # pip; absl:app
+    ],
+)
+
+py_extension(
+    name = "_benchmark",
+    srcs = ["benchmark.cc"],
+    copts = [
+        "-fexceptions",
+        "-fno-strict-aliasing",
+    ],
+    features = ["-use_header_modules"],
+    deps = [
+        "//:benchmark",
+        "@pybind11",
+        "@python_headers",
+    ],
+)
+
+py_test(
+    name = "example",
+    srcs = ["example.py"],
+    python_version = "PY3",
+    srcs_version = "PY3",
+    visibility = ["//visibility:public"],
+    deps = [
+        ":google_benchmark",
+    ],
+)
+
diff --git a/3rdparty/benchmark/bindings/python/google_benchmark/__init__.py b/3rdparty/benchmark/bindings/python/google_benchmark/__init__.py
new file mode 100644
index 00000000..ec651c14
--- /dev/null
+++ b/3rdparty/benchmark/bindings/python/google_benchmark/__init__.py
@@ -0,0 +1,158 @@
+# Copyright 2020 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Python benchmarking utilities.
+
+Example usage:
+  import google_benchmark as benchmark
+
+  @benchmark.register
+  def my_benchmark(state):
+      ...  # Code executed outside `while` loop is not timed.
+
+      while state:
+        ...  # Code executed within `while` loop is timed.
+
+  if __name__ == '__main__':
+    benchmark.main()
+"""
+
+from absl import app
+from google_benchmark import _benchmark
+from google_benchmark._benchmark import (
+    Counter,
+    kNanosecond,
+    kMicrosecond,
+    kMillisecond,
+    kSecond,
+    oNone,
+    o1,
+    oN,
+    oNSquared,
+    oNCubed,
+    oLogN,
+    oNLogN,
+    oAuto,
+    oLambda,
+)
+
+
+__all__ = [
+    "register",
+    "main",
+    "Counter",
+    "kNanosecond",
+    "kMicrosecond",
+    "kMillisecond",
+    "kSecond",
+    "oNone",
+    "o1",
+    "oN",
+    "oNSquared",
+    "oNCubed",
+    "oLogN",
+    "oNLogN",
+    "oAuto",
+    "oLambda",
+]
+
+__version__ = "1.6.1"
+
+
+class __OptionMaker:
+    """A stateless class to collect benchmark options.
+
+    Collect all decorator calls like @option.range(start=0, limit=1<<5).
+    """
+
+    class Options:
+        """Pure data class to store options calls, along with the benchmarked function."""
+
+        def __init__(self, func):
+            self.func = func
+            self.builder_calls = []
+
+    @classmethod
+    def make(cls, func_or_options):
+        """Make Options from Options or the benchmarked function."""
+        if isinstance(func_or_options, cls.Options):
+            return func_or_options
+        return cls.Options(func_or_options)
+
+    def __getattr__(self, builder_name):
+        """Append option call in the Options."""
+
+        # The function that get returned on @option.range(start=0, limit=1<<5).
+        def __builder_method(*args, **kwargs):
+
+            # The decorator that get called, either with the benchmared function
+            # or the previous Options
+            def __decorator(func_or_options):
+                options = self.make(func_or_options)
+                options.builder_calls.append((builder_name, args, kwargs))
+                # The decorator returns Options so it is not technically a decorator
+                # and needs a final call to @regiser
+                return options
+
+            return __decorator
+
+        return __builder_method
+
+
+# Alias for nicer API.
+# We have to instantiate an object, even if stateless, to be able to use __getattr__
+# on option.range
+option = __OptionMaker()
+
+
+def register(undefined=None, *, name=None):
+    """Register function for benchmarking."""
+    if undefined is None:
+        # Decorator is called without parenthesis so we return a decorator
+        return lambda f: register(f, name=name)
+
+    # We have either the function to benchmark (simple case) or an instance of Options
+    # (@option._ case).
+    options = __OptionMaker.make(undefined)
+
+    if name is None:
+        name = options.func.__name__
+
+    # We register the benchmark and reproduce all the @option._ calls onto the
+    # benchmark builder pattern
+    benchmark = _benchmark.RegisterBenchmark(name, options.func)
+    for name, args, kwargs in options.builder_calls[::-1]:
+        getattr(benchmark, name)(*args, **kwargs)
+
+    # return the benchmarked function because the decorator does not modify it
+    return options.func
+
+
+def _flags_parser(argv):
+    argv = _benchmark.Initialize(argv)
+    return app.parse_flags_with_usage(argv)
+
+
+def _run_benchmarks(argv):
+    if len(argv) > 1:
+        raise app.UsageError("Too many command-line arguments.")
+    return _benchmark.RunSpecifiedBenchmarks()
+
+
+def main(argv=None):
+    return app.run(_run_benchmarks, argv=argv, flags_parser=_flags_parser)
+
+
+# Methods for use with custom main function.
+initialize = _benchmark.Initialize
+run_benchmarks = _benchmark.RunSpecifiedBenchmarks
diff --git a/3rdparty/benchmark/bindings/python/google_benchmark/benchmark.cc b/3rdparty/benchmark/bindings/python/google_benchmark/benchmark.cc
new file mode 100644
index 00000000..02b6ed7e
--- /dev/null
+++ b/3rdparty/benchmark/bindings/python/google_benchmark/benchmark.cc
@@ -0,0 +1,181 @@
+// Benchmark for Python.
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "pybind11/operators.h"
+#include "pybind11/pybind11.h"
+#include "pybind11/stl.h"
+#include "pybind11/stl_bind.h"
+
+#include "benchmark/benchmark.h"
+
+PYBIND11_MAKE_OPAQUE(benchmark::UserCounters);
+
+namespace {
+namespace py = ::pybind11;
+
+std::vector<std::string> Initialize(const std::vector<std::string>& argv) {
+  // The `argv` pointers here become invalid when this function returns, but
+  // benchmark holds the pointer to `argv[0]`. We create a static copy of it
+  // so it persists, and replace the pointer below.
+  static std::string executable_name(argv[0]);
+  std::vector<char*> ptrs;
+  ptrs.reserve(argv.size());
+  for (auto& arg : argv) {
+    ptrs.push_back(const_cast<char*>(arg.c_str()));
+  }
+  ptrs[0] = const_cast<char*>(executable_name.c_str());
+  int argc = static_cast<int>(argv.size());
+  benchmark::Initialize(&argc, ptrs.data());
+  std::vector<std::string> remaining_argv;
+  remaining_argv.reserve(argc);
+  for (int i = 0; i < argc; ++i) {
+    remaining_argv.emplace_back(ptrs[i]);
+  }
+  return remaining_argv;
+}
+
+benchmark::internal::Benchmark* RegisterBenchmark(const char* name,
+                                                  py::function f) {
+  return benchmark::RegisterBenchmark(
+      name, [f](benchmark::State& state) { f(&state); });
+}
+
+PYBIND11_MODULE(_benchmark, m) {
+  using benchmark::TimeUnit;
+  py::enum_<TimeUnit>(m, "TimeUnit")
+      .value("kNanosecond", TimeUnit::kNanosecond)
+      .value("kMicrosecond", TimeUnit::kMicrosecond)
+      .value("kMillisecond", TimeUnit::kMillisecond)
+      .value("kSecond", TimeUnit::kSecond)
+      .export_values();
+
+  using benchmark::BigO;
+  py::enum_<BigO>(m, "BigO")
+      .value("oNone", BigO::oNone)
+      .value("o1", BigO::o1)
+      .value("oN", BigO::oN)
+      .value("oNSquared", BigO::oNSquared)
+      .value("oNCubed", BigO::oNCubed)
+      .value("oLogN", BigO::oLogN)
+      .value("oNLogN", BigO::oLogN)
+      .value("oAuto", BigO::oAuto)
+      .value("oLambda", BigO::oLambda)
+      .export_values();
+
+  using benchmark::internal::Benchmark;
+  py::class_<Benchmark>(m, "Benchmark")
+      // For methods returning a pointer tor the current object, reference
+      // return policy is used to ask pybind not to take ownership oof the
+      // returned object and avoid calling delete on it.
+      // https://pybind11.readthedocs.io/en/stable/advanced/functions.html#return-value-policies
+      //
+      // For methods taking a const std::vector<...>&, a copy is created
+      // because a it is bound to a Python list.
+      // https://pybind11.readthedocs.io/en/stable/advanced/cast/stl.html
+      .def("unit", &Benchmark::Unit, py::return_value_policy::reference)
+      .def("arg", &Benchmark::Arg, py::return_value_policy::reference)
+      .def("args", &Benchmark::Args, py::return_value_policy::reference)
+      .def("range", &Benchmark::Range, py::return_value_policy::reference,
+           py::arg("start"), py::arg("limit"))
+      .def("dense_range", &Benchmark::DenseRange,
+           py::return_value_policy::reference, py::arg("start"),
+           py::arg("limit"), py::arg("step") = 1)
+      .def("ranges", &Benchmark::Ranges, py::return_value_policy::reference)
+      .def("args_product", &Benchmark::ArgsProduct,
+           py::return_value_policy::reference)
+      .def("arg_name", &Benchmark::ArgName, py::return_value_policy::reference)
+      .def("arg_names", &Benchmark::ArgNames,
+           py::return_value_policy::reference)
+      .def("range_pair", &Benchmark::RangePair,
+           py::return_value_policy::reference, py::arg("lo1"), py::arg("hi1"),
+           py::arg("lo2"), py::arg("hi2"))
+      .def("range_multiplier", &Benchmark::RangeMultiplier,
+           py::return_value_policy::reference)
+      .def("min_time", &Benchmark::MinTime, py::return_value_policy::reference)
+      .def("iterations", &Benchmark::Iterations,
+           py::return_value_policy::reference)
+      .def("repetitions", &Benchmark::Repetitions,
+           py::return_value_policy::reference)
+      .def("report_aggregates_only", &Benchmark::ReportAggregatesOnly,
+           py::return_value_policy::reference, py::arg("value") = true)
+      .def("display_aggregates_only", &Benchmark::DisplayAggregatesOnly,
+           py::return_value_policy::reference, py::arg("value") = true)
+      .def("measure_process_cpu_time", &Benchmark::MeasureProcessCPUTime,
+           py::return_value_policy::reference)
+      .def("use_real_time", &Benchmark::UseRealTime,
+           py::return_value_policy::reference)
+      .def("use_manual_time", &Benchmark::UseManualTime,
+           py::return_value_policy::reference)
+      .def(
+          "complexity",
+          (Benchmark * (Benchmark::*)(benchmark::BigO)) & Benchmark::Complexity,
+          py::return_value_policy::reference,
+          py::arg("complexity") = benchmark::oAuto);
+
+  using benchmark::Counter;
+  py::class_<Counter> py_counter(m, "Counter");
+
+  py::enum_<Counter::Flags>(py_counter, "Flags")
+      .value("kDefaults", Counter::Flags::kDefaults)
+      .value("kIsRate", Counter::Flags::kIsRate)
+      .value("kAvgThreads", Counter::Flags::kAvgThreads)
+      .value("kAvgThreadsRate", Counter::Flags::kAvgThreadsRate)
+      .value("kIsIterationInvariant", Counter::Flags::kIsIterationInvariant)
+      .value("kIsIterationInvariantRate",
+             Counter::Flags::kIsIterationInvariantRate)
+      .value("kAvgIterations", Counter::Flags::kAvgIterations)
+      .value("kAvgIterationsRate", Counter::Flags::kAvgIterationsRate)
+      .value("kInvert", Counter::Flags::kInvert)
+      .export_values()
+      .def(py::self | py::self);
+
+  py::enum_<Counter::OneK>(py_counter, "OneK")
+      .value("kIs1000", Counter::OneK::kIs1000)
+      .value("kIs1024", Counter::OneK::kIs1024)
+      .export_values();
+
+  py_counter
+      .def(py::init<double, Counter::Flags, Counter::OneK>(),
+           py::arg("value") = 0., py::arg("flags") = Counter::kDefaults,
+           py::arg("k") = Counter::kIs1000)
+      .def(py::init([](double value) { return Counter(value); }))
+      .def_readwrite("value", &Counter::value)
+      .def_readwrite("flags", &Counter::flags)
+      .def_readwrite("oneK", &Counter::oneK);
+  py::implicitly_convertible<py::float_, Counter>();
+  py::implicitly_convertible<py::int_, Counter>();
+
+  py::bind_map<benchmark::UserCounters>(m, "UserCounters");
+
+  using benchmark::State;
+  py::class_<State>(m, "State")
+      .def("__bool__", &State::KeepRunning)
+      .def_property_readonly("keep_running", &State::KeepRunning)
+      .def("pause_timing", &State::PauseTiming)
+      .def("resume_timing", &State::ResumeTiming)
+      .def("skip_with_error", &State::SkipWithError)
+      .def_property_readonly("error_occurred", &State::error_occurred)
+      .def("set_iteration_time", &State::SetIterationTime)
+      .def_property("bytes_processed", &State::bytes_processed,
+                    &State::SetBytesProcessed)
+      .def_property("complexity_n", &State::complexity_length_n,
+                    &State::SetComplexityN)
+      .def_property("items_processed", &State::items_processed,
+                    &State::SetItemsProcessed)
+      .def("set_label", (void(State::*)(const char*)) & State::SetLabel)
+      .def("range", &State::range, py::arg("pos") = 0)
+      .def_property_readonly("iterations", &State::iterations)
+      .def_readwrite("counters", &State::counters)
+      .def_property_readonly("thread_index", &State::thread_index)
+      .def_property_readonly("threads", &State::threads);
+
+  m.def("Initialize", Initialize);
+  m.def("RegisterBenchmark", RegisterBenchmark,
+        py::return_value_policy::reference);
+  m.def("RunSpecifiedBenchmarks",
+        []() { benchmark::RunSpecifiedBenchmarks(); });
+};
+}  // namespace
diff --git a/3rdparty/benchmark/bindings/python/google_benchmark/example.py b/3rdparty/benchmark/bindings/python/google_benchmark/example.py
new file mode 100644
index 00000000..487acc9f
--- /dev/null
+++ b/3rdparty/benchmark/bindings/python/google_benchmark/example.py
@@ -0,0 +1,136 @@
+# Copyright 2020 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Example of Python using C++ benchmark framework.
+
+To run this example, you must first install the `google_benchmark` Python package.
+
+To install using `setup.py`, download and extract the `google_benchmark` source.
+In the extracted directory, execute:
+  python setup.py install
+"""
+
+import random
+import time
+
+import google_benchmark as benchmark
+from google_benchmark import Counter
+
+
+@benchmark.register
+def empty(state):
+    while state:
+        pass
+
+
+@benchmark.register
+def sum_million(state):
+    while state:
+        sum(range(1_000_000))
+
+@benchmark.register
+def pause_timing(state):
+    """Pause timing every iteration."""
+    while state:
+        # Construct a list of random ints every iteration without timing it
+        state.pause_timing()
+        random_list = [random.randint(0, 100) for _ in range(100)]
+        state.resume_timing()
+        # Time the in place sorting algorithm
+        random_list.sort()
+
+
+@benchmark.register
+def skipped(state):
+    if True:  # Test some predicate here.
+        state.skip_with_error("some error")
+        return  # NOTE: You must explicitly return, or benchmark will continue.
+
+    ...  # Benchmark code would be here.
+
+
+@benchmark.register
+def manual_timing(state):
+    while state:
+        # Manually count Python CPU time
+        start = time.perf_counter()  # perf_counter_ns() in Python 3.7+
+        # Something to benchmark
+        time.sleep(0.01)
+        end = time.perf_counter()
+        state.set_iteration_time(end - start)
+
+
+@benchmark.register
+def custom_counters(state):
+    """Collect cutom metric using benchmark.Counter."""
+    num_foo = 0.0
+    while state:
+        # Benchmark some code here
+        pass
+        # Collect some custom metric named foo
+        num_foo += 0.13
+
+    # Automatic Counter from numbers.
+    state.counters["foo"] = num_foo
+    # Set a counter as a rate.
+    state.counters["foo_rate"] = Counter(num_foo, Counter.kIsRate)
+    #  Set a counter as an inverse of rate.
+    state.counters["foo_inv_rate"] = Counter(num_foo, Counter.kIsRate | Counter.kInvert)
+    # Set a counter as a thread-average quantity.
+    state.counters["foo_avg"] = Counter(num_foo, Counter.kAvgThreads)
+    # There's also a combined flag:
+    state.counters["foo_avg_rate"] = Counter(num_foo, Counter.kAvgThreadsRate)
+
+
+@benchmark.register
+@benchmark.option.measure_process_cpu_time()
+@benchmark.option.use_real_time()
+def with_options(state):
+    while state:
+        sum(range(1_000_000))
+
+
+@benchmark.register(name="sum_million_microseconds")
+@benchmark.option.unit(benchmark.kMicrosecond)
+def with_options2(state):
+    while state:
+        sum(range(1_000_000))
+
+
+@benchmark.register
+@benchmark.option.arg(100)
+@benchmark.option.arg(1000)
+def passing_argument(state):
+    while state:
+        sum(range(state.range(0)))
+
+
+@benchmark.register
+@benchmark.option.range(8, limit=8 << 10)
+def using_range(state):
+    while state:
+        sum(range(state.range(0)))
+
+
+@benchmark.register
+@benchmark.option.range_multiplier(2)
+@benchmark.option.range(1 << 10, 1 << 18)
+@benchmark.option.complexity(benchmark.oN)
+def computing_complexity(state):
+    while state:
+        sum(range(state.range(0)))
+    state.complexity_n = state.range(0)
+
+
+if __name__ == "__main__":
+    benchmark.main()
diff --git a/3rdparty/benchmark/bindings/python/pybind11.BUILD b/3rdparty/benchmark/bindings/python/pybind11.BUILD
new file mode 100644
index 00000000..bc833500
--- /dev/null
+++ b/3rdparty/benchmark/bindings/python/pybind11.BUILD
@@ -0,0 +1,20 @@
+cc_library(
+    name = "pybind11",
+    hdrs = glob(
+        include = [
+            "include/pybind11/*.h",
+            "include/pybind11/detail/*.h",
+        ],
+        exclude = [
+            "include/pybind11/common.h",
+            "include/pybind11/eigen.h",
+        ],
+    ),
+    copts = [
+        "-fexceptions",
+        "-Wno-undefined-inline",
+        "-Wno-pragma-once-outside-header",
+    ],
+    includes = ["include"],
+    visibility = ["//visibility:public"],
+)
diff --git a/3rdparty/benchmark/bindings/python/python_headers.BUILD b/3rdparty/benchmark/bindings/python/python_headers.BUILD
new file mode 100644
index 00000000..9c34cf6c
--- /dev/null
+++ b/3rdparty/benchmark/bindings/python/python_headers.BUILD
@@ -0,0 +1,6 @@
+cc_library(
+    name = "python_headers",
+    hdrs = glob(["**/*.h"]),
+    includes = ["."],
+    visibility = ["//visibility:public"],
+)
diff --git a/3rdparty/benchmark/bindings/python/requirements.txt b/3rdparty/benchmark/bindings/python/requirements.txt
new file mode 100644
index 00000000..f5bbe7ec
--- /dev/null
+++ b/3rdparty/benchmark/bindings/python/requirements.txt
@@ -0,0 +1,2 @@
+absl-py>=0.7.1
+
diff --git a/3rdparty/benchmark/cmake/AddCXXCompilerFlag.cmake b/3rdparty/benchmark/cmake/AddCXXCompilerFlag.cmake
new file mode 100644
index 00000000..858589e9
--- /dev/null
+++ b/3rdparty/benchmark/cmake/AddCXXCompilerFlag.cmake
@@ -0,0 +1,78 @@
+# - Adds a compiler flag if it is supported by the compiler
+#
+# This function checks that the supplied compiler flag is supported and then
+# adds it to the corresponding compiler flags
+#
+#  add_cxx_compiler_flag(<FLAG> [<VARIANT>])
+#
+# - Example
+#
+# include(AddCXXCompilerFlag)
+# add_cxx_compiler_flag(-Wall)
+# add_cxx_compiler_flag(-no-strict-aliasing RELEASE)
+# Requires CMake 2.6+
+
+if(__add_cxx_compiler_flag)
+  return()
+endif()
+set(__add_cxx_compiler_flag INCLUDED)
+
+include(CheckCXXCompilerFlag)
+
+function(mangle_compiler_flag FLAG OUTPUT)
+  string(TOUPPER "HAVE_CXX_FLAG_${FLAG}" SANITIZED_FLAG)
+  string(REPLACE "+" "X" SANITIZED_FLAG ${SANITIZED_FLAG})
+  string(REGEX REPLACE "[^A-Za-z_0-9]" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
+  string(REGEX REPLACE "_+" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
+  set(${OUTPUT} "${SANITIZED_FLAG}" PARENT_SCOPE)
+endfunction(mangle_compiler_flag)
+
+function(add_cxx_compiler_flag FLAG)
+  mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
+  set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
+  set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}")
+  check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
+  set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
+  if(${MANGLED_FLAG})
+    if(ARGC GREATER 1)
+      set(VARIANT ${ARGV1})
+      string(TOUPPER "_${VARIANT}" VARIANT)
+    else()
+      set(VARIANT "")
+    endif()
+    set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${BENCHMARK_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
+  endif()
+endfunction()
+
+function(add_required_cxx_compiler_flag FLAG)
+  mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
+  set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
+  set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}")
+  check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
+  set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
+  if(${MANGLED_FLAG})
+    if(ARGC GREATER 1)
+      set(VARIANT ${ARGV1})
+      string(TOUPPER "_${VARIANT}" VARIANT)
+    else()
+      set(VARIANT "")
+    endif()
+    set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
+    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
+    set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
+    set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}" PARENT_SCOPE)
+  else()
+    message(FATAL_ERROR "Required flag '${FLAG}' is not supported by the compiler")
+  endif()
+endfunction()
+
+function(check_cxx_warning_flag FLAG)
+  mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
+  set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
+  # Add -Werror to ensure the compiler generates an error if the warning flag
+  # doesn't exist.
+  set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror ${FLAG}")
+  check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
+  set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
+endfunction()
diff --git a/3rdparty/benchmark/cmake/CXXFeatureCheck.cmake b/3rdparty/benchmark/cmake/CXXFeatureCheck.cmake
new file mode 100644
index 00000000..62e6741f
--- /dev/null
+++ b/3rdparty/benchmark/cmake/CXXFeatureCheck.cmake
@@ -0,0 +1,69 @@
+# - Compile and run code to check for C++ features
+#
+# This functions compiles a source file under the `cmake` folder
+# and adds the corresponding `HAVE_[FILENAME]` flag to the CMake
+# environment
+#
+#  cxx_feature_check(<FLAG> [<VARIANT>])
+#
+# - Example
+#
+# include(CXXFeatureCheck)
+# cxx_feature_check(STD_REGEX)
+# Requires CMake 2.8.12+
+
+if(__cxx_feature_check)
+  return()
+endif()
+set(__cxx_feature_check INCLUDED)
+
+function(cxx_feature_check FILE)
+  string(TOLOWER ${FILE} FILE)
+  string(TOUPPER ${FILE} VAR)
+  string(TOUPPER "HAVE_${VAR}" FEATURE)
+  if (DEFINED HAVE_${VAR})
+    set(HAVE_${VAR} 1 PARENT_SCOPE)
+    add_definitions(-DHAVE_${VAR})
+    return()
+  endif()
+
+  if (ARGC GREATER 1)
+    message(STATUS "Enabling additional flags: ${ARGV1}")
+    list(APPEND BENCHMARK_CXX_LINKER_FLAGS ${ARGV1})
+  endif()
+
+  if (NOT DEFINED COMPILE_${FEATURE})
+    message(STATUS "Performing Test ${FEATURE}")
+    if(CMAKE_CROSSCOMPILING)
+      try_compile(COMPILE_${FEATURE}
+              ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp
+              CMAKE_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS}
+              LINK_LIBRARIES ${BENCHMARK_CXX_LIBRARIES})
+      if(COMPILE_${FEATURE})
+        message(WARNING
+              "If you see build failures due to cross compilation, try setting HAVE_${VAR} to 0")
+        set(RUN_${FEATURE} 0 CACHE INTERNAL "")
+      else()
+        set(RUN_${FEATURE} 1 CACHE INTERNAL "")
+      endif()
+    else()
+      message(STATUS "Performing Test ${FEATURE}")
+      try_run(RUN_${FEATURE} COMPILE_${FEATURE}
+              ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp
+              CMAKE_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS}
+              LINK_LIBRARIES ${BENCHMARK_CXX_LIBRARIES})
+    endif()
+  endif()
+
+  if(RUN_${FEATURE} EQUAL 0)
+    message(STATUS "Performing Test ${FEATURE} -- success")
+    set(HAVE_${VAR} 1 PARENT_SCOPE)
+    add_definitions(-DHAVE_${VAR})
+  else()
+    if(NOT COMPILE_${FEATURE})
+      message(STATUS "Performing Test ${FEATURE} -- failed to compile")
+    else()
+      message(STATUS "Performing Test ${FEATURE} -- compiled but failed to run")
+    endif()
+  endif()
+endfunction()
diff --git a/3rdparty/benchmark/cmake/Config.cmake.in b/3rdparty/benchmark/cmake/Config.cmake.in
new file mode 100644
index 00000000..2e15f0cf
--- /dev/null
+++ b/3rdparty/benchmark/cmake/Config.cmake.in
@@ -0,0 +1,7 @@
+@PACKAGE_INIT@
+
+include (CMakeFindDependencyMacro)
+
+find_dependency (Threads)
+
+include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")
diff --git a/3rdparty/benchmark/cmake/GetGitVersion.cmake b/3rdparty/benchmark/cmake/GetGitVersion.cmake
new file mode 100644
index 00000000..04a1f9b7
--- /dev/null
+++ b/3rdparty/benchmark/cmake/GetGitVersion.cmake
@@ -0,0 +1,58 @@
+# - Returns a version string from Git tags
+#
+# This function inspects the annotated git tags for the project and returns a string
+# into a CMake variable
+#
+#  get_git_version(<var>)
+#
+# - Example
+#
+# include(GetGitVersion)
+# get_git_version(GIT_VERSION)
+#
+# Requires CMake 2.8.11+
+find_package(Git)
+
+if(__get_git_version)
+  return()
+endif()
+set(__get_git_version INCLUDED)
+
+function(get_git_version var)
+  if(GIT_EXECUTABLE)
+      execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags --match "v[0-9]*.[0-9]*.[0-9]*" --abbrev=8
+          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+          RESULT_VARIABLE status
+          OUTPUT_VARIABLE GIT_DESCRIBE_VERSION
+          ERROR_QUIET)
+      if(status)
+          set(GIT_DESCRIBE_VERSION "v0.0.0")
+      endif()
+      
+      string(STRIP ${GIT_DESCRIBE_VERSION} GIT_DESCRIBE_VERSION)
+      if(GIT_DESCRIBE_VERSION MATCHES v[^-]*-) 
+         string(REGEX REPLACE "v([^-]*)-([0-9]+)-.*" "\\1.\\2"  GIT_VERSION ${GIT_DESCRIBE_VERSION})
+      else()
+         string(REGEX REPLACE "v(.*)" "\\1" GIT_VERSION ${GIT_DESCRIBE_VERSION})
+      endif()
+
+      # Work out if the repository is dirty
+      execute_process(COMMAND ${GIT_EXECUTABLE} update-index -q --refresh
+          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+          OUTPUT_QUIET
+          ERROR_QUIET)
+      execute_process(COMMAND ${GIT_EXECUTABLE} diff-index --name-only HEAD --
+          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+          OUTPUT_VARIABLE GIT_DIFF_INDEX
+          ERROR_QUIET)
+      string(COMPARE NOTEQUAL "${GIT_DIFF_INDEX}" "" GIT_DIRTY)
+      if (${GIT_DIRTY})
+          set(GIT_DESCRIBE_VERSION "${GIT_DESCRIBE_VERSION}-dirty")
+      endif()
+      message(STATUS "git version: ${GIT_DESCRIBE_VERSION} normalized to ${GIT_VERSION}")
+  else()
+      set(GIT_VERSION "0.0.0")
+  endif()
+
+  set(${var} ${GIT_VERSION} PARENT_SCOPE)
+endfunction()
diff --git a/3rdparty/benchmark/cmake/GoogleTest.cmake b/3rdparty/benchmark/cmake/GoogleTest.cmake
new file mode 100644
index 00000000..66cb9100
--- /dev/null
+++ b/3rdparty/benchmark/cmake/GoogleTest.cmake
@@ -0,0 +1,48 @@
+# Download and unpack googletest at configure time
+set(GOOGLETEST_PREFIX "${benchmark_BINARY_DIR}/third_party/googletest")
+configure_file(${benchmark_SOURCE_DIR}/cmake/GoogleTest.cmake.in ${GOOGLETEST_PREFIX}/CMakeLists.txt @ONLY)
+
+set(GOOGLETEST_PATH "${CMAKE_CURRENT_SOURCE_DIR}/googletest" CACHE PATH "") # Mind the quotes
+execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}"
+  -DALLOW_DOWNLOADING_GOOGLETEST=${BENCHMARK_DOWNLOAD_DEPENDENCIES} -DGOOGLETEST_PATH:PATH=${GOOGLETEST_PATH} .
+  RESULT_VARIABLE result
+  WORKING_DIRECTORY ${GOOGLETEST_PREFIX}
+)
+
+if(result)
+  message(FATAL_ERROR "CMake step for googletest failed: ${result}")
+endif()
+
+execute_process(
+  COMMAND ${CMAKE_COMMAND} --build .
+  RESULT_VARIABLE result
+  WORKING_DIRECTORY ${GOOGLETEST_PREFIX}
+)
+
+if(result)
+  message(FATAL_ERROR "Build step for googletest failed: ${result}")
+endif()
+
+# Prevent overriding the parent project's compiler/linker
+# settings on Windows
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+
+include(${GOOGLETEST_PREFIX}/googletest-paths.cmake)
+
+# googletest doesn't seem to want to stay build warning clean so let's not hurt ourselves.
+add_compile_options(-w)
+
+# Add googletest directly to our build. This defines
+# the gtest and gtest_main targets.
+add_subdirectory(${GOOGLETEST_SOURCE_DIR}
+                 ${GOOGLETEST_BINARY_DIR}
+                 EXCLUDE_FROM_ALL)
+
+if(NOT DEFINED GTEST_COMPILE_COMMANDS)
+    set(GTEST_COMPILE_COMMANDS ON)
+endif()
+
+set_target_properties(gtest PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gtest,INTERFACE_INCLUDE_DIRECTORIES> EXPORT_COMPILE_COMMANDS ${GTEST_COMPILE_COMMANDS})
+set_target_properties(gtest_main PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gtest_main,INTERFACE_INCLUDE_DIRECTORIES> EXPORT_COMPILE_COMMANDS ${GTEST_COMPILE_COMMANDS})
+set_target_properties(gmock PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gmock,INTERFACE_INCLUDE_DIRECTORIES> EXPORT_COMPILE_COMMANDS ${GTEST_COMPILE_COMMANDS})
+set_target_properties(gmock_main PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gmock_main,INTERFACE_INCLUDE_DIRECTORIES> EXPORT_COMPILE_COMMANDS ${GTEST_COMPILE_COMMANDS})
diff --git a/3rdparty/benchmark/cmake/GoogleTest.cmake.in b/3rdparty/benchmark/cmake/GoogleTest.cmake.in
new file mode 100644
index 00000000..ce653ac3
--- /dev/null
+++ b/3rdparty/benchmark/cmake/GoogleTest.cmake.in
@@ -0,0 +1,59 @@
+cmake_minimum_required(VERSION 2.8.12)
+
+project(googletest-download NONE)
+
+# Enable ExternalProject CMake module
+include(ExternalProject)
+
+option(ALLOW_DOWNLOADING_GOOGLETEST "If googletest src tree is not found in location specified by GOOGLETEST_PATH, do fetch the archive from internet" OFF)
+set(GOOGLETEST_PATH "/usr/src/googletest" CACHE PATH
+                    "Path to the googletest root tree. Should contain googletest and googlemock subdirs. And CMakeLists.txt in root, and in both of these subdirs")
+
+# Download and install GoogleTest
+
+message(STATUS "Looking for Google Test sources")
+message(STATUS "Looking for Google Test sources in ${GOOGLETEST_PATH}")
+if(EXISTS "${GOOGLETEST_PATH}"            AND IS_DIRECTORY "${GOOGLETEST_PATH}"            AND EXISTS "${GOOGLETEST_PATH}/CMakeLists.txt" AND
+   EXISTS "${GOOGLETEST_PATH}/googletest" AND IS_DIRECTORY "${GOOGLETEST_PATH}/googletest" AND EXISTS "${GOOGLETEST_PATH}/googletest/CMakeLists.txt" AND
+   EXISTS "${GOOGLETEST_PATH}/googlemock" AND IS_DIRECTORY "${GOOGLETEST_PATH}/googlemock" AND EXISTS "${GOOGLETEST_PATH}/googlemock/CMakeLists.txt")
+  message(STATUS "Found Google Test in ${GOOGLETEST_PATH}")
+
+  ExternalProject_Add(
+    googletest
+    PREFIX            "${CMAKE_BINARY_DIR}"
+    DOWNLOAD_DIR      "${CMAKE_BINARY_DIR}/download"
+    SOURCE_DIR        "${GOOGLETEST_PATH}" # use existing src dir.
+    BINARY_DIR        "${CMAKE_BINARY_DIR}/build"
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND     ""
+    INSTALL_COMMAND   ""
+    TEST_COMMAND      ""
+  )
+else()
+  if(NOT ALLOW_DOWNLOADING_GOOGLETEST)
+    message(SEND_ERROR "Did not find Google Test sources! Either pass correct path in GOOGLETEST_PATH, or enable BENCHMARK_DOWNLOAD_DEPENDENCIES, or disable BENCHMARK_USE_BUNDLED_GTEST, or disable BENCHMARK_ENABLE_GTEST_TESTS / BENCHMARK_ENABLE_TESTING.")
+    return()
+  else()
+    message(WARNING "Did not find Google Test sources! Fetching from web...")
+    ExternalProject_Add(
+      googletest
+      GIT_REPOSITORY    https://github.com/google/googletest.git
+      GIT_TAG           "release-1.11.0"
+      PREFIX            "${CMAKE_BINARY_DIR}"
+      STAMP_DIR         "${CMAKE_BINARY_DIR}/stamp"
+      DOWNLOAD_DIR      "${CMAKE_BINARY_DIR}/download"
+      SOURCE_DIR        "${CMAKE_BINARY_DIR}/src"
+      BINARY_DIR        "${CMAKE_BINARY_DIR}/build"
+      CONFIGURE_COMMAND ""
+      BUILD_COMMAND     ""
+      INSTALL_COMMAND   ""
+      TEST_COMMAND      ""
+    )
+  endif()
+endif()
+
+ExternalProject_Get_Property(googletest SOURCE_DIR BINARY_DIR)
+file(WRITE googletest-paths.cmake
+"set(GOOGLETEST_SOURCE_DIR \"${SOURCE_DIR}\")
+set(GOOGLETEST_BINARY_DIR \"${BINARY_DIR}\")
+")
diff --git a/3rdparty/benchmark/cmake/Modules/FindLLVMAr.cmake b/3rdparty/benchmark/cmake/Modules/FindLLVMAr.cmake
new file mode 100644
index 00000000..23469813
--- /dev/null
+++ b/3rdparty/benchmark/cmake/Modules/FindLLVMAr.cmake
@@ -0,0 +1,16 @@
+include(FeatureSummary)
+
+find_program(LLVMAR_EXECUTABLE
+  NAMES llvm-ar
+  DOC "The llvm-ar executable"
+  )
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(LLVMAr
+  DEFAULT_MSG
+  LLVMAR_EXECUTABLE)
+
+SET_PACKAGE_PROPERTIES(LLVMAr PROPERTIES
+  URL https://llvm.org/docs/CommandGuide/llvm-ar.html
+  DESCRIPTION "create, modify, and extract from archives"
+)
diff --git a/3rdparty/benchmark/cmake/Modules/FindLLVMNm.cmake b/3rdparty/benchmark/cmake/Modules/FindLLVMNm.cmake
new file mode 100644
index 00000000..e56430a0
--- /dev/null
+++ b/3rdparty/benchmark/cmake/Modules/FindLLVMNm.cmake
@@ -0,0 +1,16 @@
+include(FeatureSummary)
+
+find_program(LLVMNM_EXECUTABLE
+  NAMES llvm-nm
+  DOC "The llvm-nm executable"
+  )
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(LLVMNm
+  DEFAULT_MSG
+  LLVMNM_EXECUTABLE)
+
+SET_PACKAGE_PROPERTIES(LLVMNm PROPERTIES
+  URL https://llvm.org/docs/CommandGuide/llvm-nm.html
+  DESCRIPTION "list LLVM bitcode and object file’s symbol table"
+)
diff --git a/3rdparty/benchmark/cmake/Modules/FindLLVMRanLib.cmake b/3rdparty/benchmark/cmake/Modules/FindLLVMRanLib.cmake
new file mode 100644
index 00000000..7b53e1a7
--- /dev/null
+++ b/3rdparty/benchmark/cmake/Modules/FindLLVMRanLib.cmake
@@ -0,0 +1,15 @@
+include(FeatureSummary)
+
+find_program(LLVMRANLIB_EXECUTABLE
+  NAMES llvm-ranlib
+  DOC "The llvm-ranlib executable"
+  )
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(LLVMRanLib
+  DEFAULT_MSG
+  LLVMRANLIB_EXECUTABLE)
+
+SET_PACKAGE_PROPERTIES(LLVMRanLib PROPERTIES
+  DESCRIPTION "generate index for LLVM archive"
+)
diff --git a/3rdparty/benchmark/cmake/Modules/FindPFM.cmake b/3rdparty/benchmark/cmake/Modules/FindPFM.cmake
new file mode 100644
index 00000000..cf807a1e
--- /dev/null
+++ b/3rdparty/benchmark/cmake/Modules/FindPFM.cmake
@@ -0,0 +1,26 @@
+# If successful, the following variables will be defined:
+# HAVE_LIBPFM.
+# Set BENCHMARK_ENABLE_LIBPFM to 0 to disable, regardless of libpfm presence.
+include(CheckIncludeFile)
+include(CheckLibraryExists)
+include(FeatureSummary)
+enable_language(C)
+
+set_package_properties(PFM PROPERTIES
+                       URL http://perfmon2.sourceforge.net/
+                       DESCRIPTION "a helper library to develop monitoring tools"
+                       PURPOSE "Used to program specific performance monitoring events")
+
+check_library_exists(libpfm.a pfm_initialize "" HAVE_LIBPFM_INITIALIZE)
+if(HAVE_LIBPFM_INITIALIZE)
+  check_include_file(perfmon/perf_event.h HAVE_PERFMON_PERF_EVENT_H)
+  check_include_file(perfmon/pfmlib.h HAVE_PERFMON_PFMLIB_H)
+  check_include_file(perfmon/pfmlib_perf_event.h HAVE_PERFMON_PFMLIB_PERF_EVENT_H)
+  if(HAVE_PERFMON_PERF_EVENT_H AND HAVE_PERFMON_PFMLIB_H AND HAVE_PERFMON_PFMLIB_PERF_EVENT_H)
+    message("Using Perf Counters.")
+    set(HAVE_LIBPFM 1)
+    set(PFM_FOUND 1)
+  endif()
+else()
+  message("Perf Counters support requested, but was unable to find libpfm.")
+endif()
diff --git a/3rdparty/benchmark/cmake/benchmark.pc.in b/3rdparty/benchmark/cmake/benchmark.pc.in
new file mode 100644
index 00000000..34beb012
--- /dev/null
+++ b/3rdparty/benchmark/cmake/benchmark.pc.in
@@ -0,0 +1,12 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
+includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+
+Name: @PROJECT_NAME@
+Description: Google microbenchmark framework
+Version: @VERSION@
+
+Libs: -L${libdir} -lbenchmark
+Libs.private: -lpthread
+Cflags: -I${includedir}
diff --git a/3rdparty/benchmark/cmake/gnu_posix_regex.cpp b/3rdparty/benchmark/cmake/gnu_posix_regex.cpp
new file mode 100644
index 00000000..b5b91cda
--- /dev/null
+++ b/3rdparty/benchmark/cmake/gnu_posix_regex.cpp
@@ -0,0 +1,12 @@
+#include <gnuregex.h>
+#include <string>
+int main() {
+  std::string str = "test0159";
+  regex_t re;
+  int ec = regcomp(&re, "^[a-z]+[0-9]+$", REG_EXTENDED | REG_NOSUB);
+  if (ec != 0) {
+    return ec;
+  }
+  return regexec(&re, str.c_str(), 0, nullptr, 0) ? -1 : 0;
+}
+
diff --git a/3rdparty/benchmark/cmake/llvm-toolchain.cmake b/3rdparty/benchmark/cmake/llvm-toolchain.cmake
new file mode 100644
index 00000000..fc119e52
--- /dev/null
+++ b/3rdparty/benchmark/cmake/llvm-toolchain.cmake
@@ -0,0 +1,8 @@
+find_package(LLVMAr REQUIRED)
+set(CMAKE_AR "${LLVMAR_EXECUTABLE}" CACHE FILEPATH "" FORCE)
+
+find_package(LLVMNm REQUIRED)
+set(CMAKE_NM "${LLVMNM_EXECUTABLE}" CACHE FILEPATH "" FORCE)
+
+find_package(LLVMRanLib REQUIRED)
+set(CMAKE_RANLIB "${LLVMRANLIB_EXECUTABLE}" CACHE FILEPATH "" FORCE)
diff --git a/3rdparty/benchmark/cmake/posix_regex.cpp b/3rdparty/benchmark/cmake/posix_regex.cpp
new file mode 100644
index 00000000..466dc625
--- /dev/null
+++ b/3rdparty/benchmark/cmake/posix_regex.cpp
@@ -0,0 +1,14 @@
+#include <regex.h>
+#include <string>
+int main() {
+  std::string str = "test0159";
+  regex_t re;
+  int ec = regcomp(&re, "^[a-z]+[0-9]+$", REG_EXTENDED | REG_NOSUB);
+  if (ec != 0) {
+    return ec;
+  }
+  int ret = regexec(&re, str.c_str(), 0, nullptr, 0) ? -1 : 0;
+  regfree(&re);
+  return ret;
+}
+
diff --git a/3rdparty/benchmark/cmake/split_list.cmake b/3rdparty/benchmark/cmake/split_list.cmake
new file mode 100644
index 00000000..67aed3fd
--- /dev/null
+++ b/3rdparty/benchmark/cmake/split_list.cmake
@@ -0,0 +1,3 @@
+macro(split_list listname)
+  string(REPLACE ";" " " ${listname} "${${listname}}")
+endmacro()
diff --git a/3rdparty/benchmark/cmake/std_regex.cpp b/3rdparty/benchmark/cmake/std_regex.cpp
new file mode 100644
index 00000000..696f2a26
--- /dev/null
+++ b/3rdparty/benchmark/cmake/std_regex.cpp
@@ -0,0 +1,10 @@
+#include <regex>
+#include <string>
+int main() {
+  const std::string str = "test0159";
+  std::regex re;
+  re = std::regex("^[a-z]+[0-9]+$",
+       std::regex_constants::extended | std::regex_constants::nosubs);
+  return std::regex_search(str, re) ? 0 : -1;
+}
+
diff --git a/3rdparty/benchmark/cmake/steady_clock.cpp b/3rdparty/benchmark/cmake/steady_clock.cpp
new file mode 100644
index 00000000..66d50d17
--- /dev/null
+++ b/3rdparty/benchmark/cmake/steady_clock.cpp
@@ -0,0 +1,7 @@
+#include <chrono>
+
+int main() {
+    typedef std::chrono::steady_clock Clock;
+    Clock::time_point tp = Clock::now();
+    ((void)tp);
+}
diff --git a/3rdparty/benchmark/cmake/thread_safety_attributes.cpp b/3rdparty/benchmark/cmake/thread_safety_attributes.cpp
new file mode 100644
index 00000000..46161bab
--- /dev/null
+++ b/3rdparty/benchmark/cmake/thread_safety_attributes.cpp
@@ -0,0 +1,4 @@
+#define HAVE_THREAD_SAFETY_ATTRIBUTES
+#include "../src/mutex.h"
+
+int main() {}
diff --git a/3rdparty/benchmark/docs/AssemblyTests.md b/3rdparty/benchmark/docs/AssemblyTests.md
new file mode 100644
index 00000000..1fbdc269
--- /dev/null
+++ b/3rdparty/benchmark/docs/AssemblyTests.md
@@ -0,0 +1,147 @@
+# Assembly Tests
+
+The Benchmark library provides a number of functions whose primary
+purpose in to affect assembly generation, including `DoNotOptimize`
+and `ClobberMemory`. In addition there are other functions,
+such as `KeepRunning`, for which generating good assembly is paramount.
+
+For these functions it's important to have tests that verify the
+correctness and quality of the implementation. This requires testing
+the code generated by the compiler.
+
+This document describes how the Benchmark library tests compiler output,
+as well as how to properly write new tests.
+
+
+## Anatomy of a Test
+
+Writing a test has two steps:
+
+* Write the code you want to generate assembly for.
+* Add `// CHECK` lines to match against the verified assembly.
+
+Example:
+```c++
+
+// CHECK-LABEL: test_add:
+extern "C" int test_add() {
+    extern int ExternInt;
+    return ExternInt + 1;
+
+    // CHECK: movl ExternInt(%rip), %eax
+    // CHECK: addl %eax
+    // CHECK: ret
+}
+
+```
+
+#### LLVM Filecheck
+
+[LLVM's Filecheck](https://llvm.org/docs/CommandGuide/FileCheck.html)
+is used to test the generated assembly against the `// CHECK` lines
+specified in the tests source file. Please see the documentation
+linked above for information on how to write `CHECK` directives.
+
+#### Tips and Tricks:
+
+* Tests should match the minimal amount of output required to establish
+correctness. `CHECK` directives don't have to match on the exact next line
+after the previous match, so tests should omit checks for unimportant
+bits of assembly. ([`CHECK-NEXT`](https://llvm.org/docs/CommandGuide/FileCheck.html#the-check-next-directive)
+can be used to ensure a match occurs exactly after the previous match).
+
+* The tests are compiled with `-O3 -g0`. So we're only testing the
+optimized output.
+
+* The assembly output is further cleaned up using `tools/strip_asm.py`.
+This removes comments, assembler directives, and unused labels before
+the test is run.
+
+* The generated and stripped assembly file for a test is output under
+`<build-directory>/test/<test-name>.s`
+
+* Filecheck supports using [`CHECK` prefixes](https://llvm.org/docs/CommandGuide/FileCheck.html#cmdoption-check-prefixes)
+to specify lines that should only match in certain situations.
+The Benchmark tests use `CHECK-CLANG` and `CHECK-GNU` for lines that
+are only expected to match Clang or GCC's output respectively. Normal
+`CHECK` lines match against all compilers. (Note: `CHECK-NOT` and
+`CHECK-LABEL` are NOT prefixes. They are versions of non-prefixed
+`CHECK` lines)
+
+* Use `extern "C"` to disable name mangling for specific functions. This
+makes them easier to name in the `CHECK` lines.
+
+
+## Problems Writing Portable Tests
+
+Writing tests which check the code generated by a compiler are
+inherently non-portable. Different compilers and even different compiler
+versions may generate entirely different code. The Benchmark tests
+must tolerate this.
+
+LLVM Filecheck provides a number of mechanisms to help write
+"more portable" tests; including [matching using regular expressions](https://llvm.org/docs/CommandGuide/FileCheck.html#filecheck-pattern-matching-syntax),
+allowing the creation of [named variables](https://llvm.org/docs/CommandGuide/FileCheck.html#filecheck-variables)
+for later matching, and [checking non-sequential matches](https://llvm.org/docs/CommandGuide/FileCheck.html#the-check-dag-directive).
+
+#### Capturing Variables
+
+For example, say GCC stores a variable in a register but Clang stores
+it in memory. To write a test that tolerates both cases we "capture"
+the destination of the store, and then use the captured expression
+to write the remainder of the test.
+
+```c++
+// CHECK-LABEL: test_div_no_op_into_shr:
+extern "C" void test_div_no_op_into_shr(int value) {
+    int divisor = 2;
+    benchmark::DoNotOptimize(divisor); // hide the value from the optimizer
+    return value / divisor;
+
+    // CHECK: movl $2, [[DEST:.*]]
+    // CHECK: idivl [[DEST]]
+    // CHECK: ret
+}
+```
+
+#### Using Regular Expressions to Match Differing Output
+
+Often tests require testing assembly lines which may subtly differ
+between compilers or compiler versions. A common example of this
+is matching stack frame addresses. In this case regular expressions
+can be used to match the differing bits of output. For example:
+
+```c++
+int ExternInt;
+struct Point { int x, y, z; };
+
+// CHECK-LABEL: test_store_point:
+extern "C" void test_store_point() {
+    Point p{ExternInt, ExternInt, ExternInt};
+    benchmark::DoNotOptimize(p);
+
+    // CHECK: movl ExternInt(%rip), %eax
+    // CHECK: movl %eax, -{{[0-9]+}}(%rsp)
+    // CHECK: movl %eax, -{{[0-9]+}}(%rsp)
+    // CHECK: movl %eax, -{{[0-9]+}}(%rsp)
+    // CHECK: ret
+}
+```
+
+## Current Requirements and Limitations
+
+The tests require Filecheck to be installed along the `PATH` of the
+build machine. Otherwise the tests will be disabled.
+
+Additionally, as mentioned in the previous section, codegen tests are
+inherently non-portable. Currently the tests are limited to:
+
+* x86_64 targets.
+* Compiled with GCC or Clang
+
+Further work could be done, at least on a limited basis, to extend the
+tests to other architectures and compilers (using `CHECK` prefixes).
+
+Furthermore, the tests fail for builds which specify additional flags
+that modify code generation, including `--coverage` or `-fsanitize=`.
+
diff --git a/3rdparty/benchmark/docs/_config.yml b/3rdparty/benchmark/docs/_config.yml
new file mode 100644
index 00000000..2f7efbea
--- /dev/null
+++ b/3rdparty/benchmark/docs/_config.yml
@@ -0,0 +1 @@
+theme: jekyll-theme-minimal
\ No newline at end of file
diff --git a/3rdparty/benchmark/docs/dependencies.md b/3rdparty/benchmark/docs/dependencies.md
new file mode 100644
index 00000000..7af52b95
--- /dev/null
+++ b/3rdparty/benchmark/docs/dependencies.md
@@ -0,0 +1,19 @@
+# Build tool dependency policy
+
+To ensure the broadest compatibility when building the benchmark library, but
+still allow forward progress, we require any build tooling to be available for:
+
+* Debian stable _and_
+* The last two Ubuntu LTS releases
+
+Currently, this means using build tool versions that are available for Ubuntu
+18.04 (Bionic Beaver), Ubuntu 20.04 (Focal Fossa), and Debian 11 (bullseye).
+
+_Note, CI also runs ubuntu-16.04 and ubuntu-14.04 to ensure best effort support
+for older versions._
+
+## cmake
+The current supported version is cmake 3.5.1 as of 2018-06-06.
+
+_Note, this version is also available for Ubuntu 14.04, an older Ubuntu LTS
+release, as `cmake3`._
diff --git a/3rdparty/benchmark/docs/index.md b/3rdparty/benchmark/docs/index.md
new file mode 100644
index 00000000..eb82eff9
--- /dev/null
+++ b/3rdparty/benchmark/docs/index.md
@@ -0,0 +1,10 @@
+# Benchmark
+
+* [Assembly Tests](AssemblyTests.md)
+* [Dependencies](dependencies.md)
+* [Perf Counters](perf_counters.md)
+* [Platform Specific Build Instructions](platform_specific_build_instructions.md)
+* [Random Interleaving](random_interleaving.md)
+* [Releasing](releasing.md)
+* [Tools](tools.md)
+* [User Guide](user_guide.md)
\ No newline at end of file
diff --git a/3rdparty/benchmark/docs/perf_counters.md b/3rdparty/benchmark/docs/perf_counters.md
new file mode 100644
index 00000000..74560e96
--- /dev/null
+++ b/3rdparty/benchmark/docs/perf_counters.md
@@ -0,0 +1,34 @@
+<a name="perf-counters" />
+
+# User-Requested Performance Counters
+
+When running benchmarks, the user may choose to request collection of
+performance counters. This may be useful in investigation scenarios - narrowing
+down the cause of a regression; or verifying that the underlying cause of a
+performance improvement matches expectations.
+
+This feature is available if:
+
+* The benchmark is run on an architecture featuring a Performance Monitoring
+  Unit (PMU),
+* The benchmark is compiled with support for collecting counters. Currently,
+  this requires [libpfm](http://perfmon2.sourceforge.net/) be available at build
+  time
+
+The feature does not require modifying benchmark code. Counter collection is
+handled at the boundaries where timer collection is also handled. 
+
+To opt-in:
+
+*  Install `libpfm4-dev`, e.g. `apt-get install libpfm4-dev`.
+*  Enable the cmake flag BENCHMARK_ENABLE_LIBPFM.
+
+To use, pass a comma-separated list of counter names through the
+`--benchmark_perf_counters` flag. The names are decoded through libpfm - meaning,
+they are platform specific, but some (e.g. `CYCLES` or `INSTRUCTIONS`) are
+mapped by libpfm to platform-specifics - see libpfm
+[documentation](http://perfmon2.sourceforge.net/docs.html) for more details.
+
+The counter values are reported back through the [User Counters](../README.md#custom-counters)
+mechanism, meaning, they are available in all the formats (e.g. JSON) supported
+by User Counters.
\ No newline at end of file
diff --git a/3rdparty/benchmark/docs/platform_specific_build_instructions.md b/3rdparty/benchmark/docs/platform_specific_build_instructions.md
new file mode 100644
index 00000000..2d5d6c47
--- /dev/null
+++ b/3rdparty/benchmark/docs/platform_specific_build_instructions.md
@@ -0,0 +1,48 @@
+# Platform Specific Build Instructions
+
+## Building with GCC
+
+When the library is built using GCC it is necessary to link with the pthread
+library due to how GCC implements `std::thread`. Failing to link to pthread will
+lead to runtime exceptions (unless you're using libc++), not linker errors. See
+[issue #67](https://github.com/google/benchmark/issues/67) for more details. You
+can link to pthread by adding `-pthread` to your linker command. Note, you can
+also use `-lpthread`, but there are potential issues with ordering of command
+line parameters if you use that.
+
+On QNX, the pthread library is part of libc and usually included automatically
+(see
+[`pthread_create()`](https://www.qnx.com/developers/docs/7.1/index.html#com.qnx.doc.neutrino.lib_ref/topic/p/pthread_create.html)).
+There's no separate pthread library to link.
+
+## Building with Visual Studio 2015 or 2017
+
+The `shlwapi` library (`-lshlwapi`) is required to support a call to `CPUInfo` which reads the registry. Either add `shlwapi.lib` under `[ Configuration Properties > Linker > Input ]`, or use the following:
+
+```
+// Alternatively, can add libraries using linker options.
+#ifdef _WIN32
+#pragma comment ( lib, "Shlwapi.lib" )
+#ifdef _DEBUG
+#pragma comment ( lib, "benchmarkd.lib" )
+#else
+#pragma comment ( lib, "benchmark.lib" )
+#endif
+#endif
+```
+
+Can also use the graphical version of CMake:
+* Open `CMake GUI`.
+* Under `Where to build the binaries`, same path as source plus `build`.
+* Under `CMAKE_INSTALL_PREFIX`, same path as source plus `install`.
+* Click `Configure`, `Generate`, `Open Project`.
+* If build fails, try deleting entire directory and starting again, or unticking options to build less.
+
+## Building with Intel 2015 Update 1 or Intel System Studio Update 4
+
+See instructions for building with Visual Studio. Once built, right click on the solution and change the build to Intel.
+
+## Building on Solaris
+
+If you're running benchmarks on solaris, you'll want the kstat library linked in
+too (`-lkstat`).
\ No newline at end of file
diff --git a/3rdparty/benchmark/docs/random_interleaving.md b/3rdparty/benchmark/docs/random_interleaving.md
new file mode 100644
index 00000000..c0830368
--- /dev/null
+++ b/3rdparty/benchmark/docs/random_interleaving.md
@@ -0,0 +1,13 @@
+<a name="interleaving" />
+
+# Random Interleaving
+
+[Random Interleaving](https://github.com/google/benchmark/issues/1051) is a
+technique to lower run-to-run variance. It randomly interleaves repetitions of a
+microbenchmark with repetitions from other microbenchmarks in the same benchmark
+test. Data shows it is able to lower run-to-run variance by
+[40%](https://github.com/google/benchmark/issues/1051) on average.
+
+To use, you mainly need to set `--benchmark_enable_random_interleaving=true`,
+and optionally specify non-zero repetition count `--benchmark_repetitions=9`
+and optionally decrease the per-repetition time `--benchmark_min_time=0.1`.
diff --git a/3rdparty/benchmark/docs/releasing.md b/3rdparty/benchmark/docs/releasing.md
new file mode 100644
index 00000000..334f9353
--- /dev/null
+++ b/3rdparty/benchmark/docs/releasing.md
@@ -0,0 +1,35 @@
+# How to release
+
+* Make sure you're on main and synced to HEAD
+* Ensure the project builds and tests run (sanity check only, obviously)
+    * `parallel -j0 exec ::: test/*_test` can help ensure everything at least
+      passes
+* Prepare release notes
+    * `git log $(git describe --abbrev=0 --tags)..HEAD` gives you the list of
+      commits between the last annotated tag and HEAD
+    * Pick the most interesting.
+* Create one last commit that updates the version saved in `CMakeLists.txt` and the
+  `__version__` variable in `bindings/python/google_benchmark/__init__.py`to the release
+  version you're creating. (This version will be used if benchmark is installed from the
+  archive you'll be creating in the next step.)
+
+```
+project (benchmark VERSION 1.6.0 LANGUAGES CXX)
+```
+
+```python
+# bindings/python/google_benchmark/__init__.py
+
+# ...
+
+__version__ = "1.6.0"  # <-- change this to the release version you are creating
+
+# ...
+```
+
+* Create a release through github's interface
+    * Note this will create a lightweight tag.
+    * Update this to an annotated tag:
+      * `git pull --tags`
+      * `git tag -a -f <tag> <tag>`
+      * `git push --force --tags origin`
diff --git a/3rdparty/benchmark/docs/tools.md b/3rdparty/benchmark/docs/tools.md
new file mode 100644
index 00000000..f2d0c497
--- /dev/null
+++ b/3rdparty/benchmark/docs/tools.md
@@ -0,0 +1,203 @@
+# Benchmark Tools
+
+## compare.py
+
+The `compare.py` can be used to compare the result of benchmarks.
+
+### Dependencies
+The utility relies on the [scipy](https://www.scipy.org) package which can be installed using pip:
+```bash
+pip3 install -r requirements.txt
+```
+
+### Displaying aggregates only
+
+The switch `-a` / `--display_aggregates_only` can be used to control the
+displayment of the normal iterations vs the aggregates. When passed, it will
+be passthrough to the benchmark binaries to be run, and will be accounted for
+in the tool itself; only the aggregates will be displayed, but not normal runs.
+It only affects the display, the separate runs will still be used to calculate
+the U test.
+
+### Modes of operation
+
+There are three modes of operation:
+
+1. Just compare two benchmarks
+The program is invoked like:
+
+``` bash
+$ compare.py benchmarks <benchmark_baseline> <benchmark_contender> [benchmark options]...
+```
+Where `<benchmark_baseline>` and `<benchmark_contender>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
+
+`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
+
+Example output:
+```
+$ ./compare.py benchmarks ./a.out ./a.out
+RUNNING: ./a.out --benchmark_out=/tmp/tmprBT5nW
+Run on (8 X 4000 MHz CPU s)
+2017-11-07 21:16:44
+------------------------------------------------------
+Benchmark               Time           CPU Iterations
+------------------------------------------------------
+BM_memcpy/8            36 ns         36 ns   19101577   211.669MB/s
+BM_memcpy/64           76 ns         76 ns    9412571   800.199MB/s
+BM_memcpy/512          84 ns         84 ns    8249070   5.64771GB/s
+BM_memcpy/1024        116 ns        116 ns    6181763   8.19505GB/s
+BM_memcpy/8192        643 ns        643 ns    1062855   11.8636GB/s
+BM_copy/8             222 ns        222 ns    3137987   34.3772MB/s
+BM_copy/64           1608 ns       1608 ns     432758   37.9501MB/s
+BM_copy/512         12589 ns      12589 ns      54806   38.7867MB/s
+BM_copy/1024        25169 ns      25169 ns      27713   38.8003MB/s
+BM_copy/8192       201165 ns     201112 ns       3486   38.8466MB/s
+RUNNING: ./a.out --benchmark_out=/tmp/tmpt1wwG_
+Run on (8 X 4000 MHz CPU s)
+2017-11-07 21:16:53
+------------------------------------------------------
+Benchmark               Time           CPU Iterations
+------------------------------------------------------
+BM_memcpy/8            36 ns         36 ns   19397903   211.255MB/s
+BM_memcpy/64           73 ns         73 ns    9691174   839.635MB/s
+BM_memcpy/512          85 ns         85 ns    8312329   5.60101GB/s
+BM_memcpy/1024        118 ns        118 ns    6438774   8.11608GB/s
+BM_memcpy/8192        656 ns        656 ns    1068644   11.6277GB/s
+BM_copy/8             223 ns        223 ns    3146977   34.2338MB/s
+BM_copy/64           1611 ns       1611 ns     435340   37.8751MB/s
+BM_copy/512         12622 ns      12622 ns      54818   38.6844MB/s
+BM_copy/1024        25257 ns      25239 ns      27779   38.6927MB/s
+BM_copy/8192       205013 ns     205010 ns       3479    38.108MB/s
+Comparing ./a.out to ./a.out
+Benchmark                 Time             CPU      Time Old      Time New       CPU Old       CPU New
+------------------------------------------------------------------------------------------------------
+BM_memcpy/8            +0.0020         +0.0020            36            36            36            36
+BM_memcpy/64           -0.0468         -0.0470            76            73            76            73
+BM_memcpy/512          +0.0081         +0.0083            84            85            84            85
+BM_memcpy/1024         +0.0098         +0.0097           116           118           116           118
+BM_memcpy/8192         +0.0200         +0.0203           643           656           643           656
+BM_copy/8              +0.0046         +0.0042           222           223           222           223
+BM_copy/64             +0.0020         +0.0020          1608          1611          1608          1611
+BM_copy/512            +0.0027         +0.0026         12589         12622         12589         12622
+BM_copy/1024           +0.0035         +0.0028         25169         25257         25169         25239
+BM_copy/8192           +0.0191         +0.0194        201165        205013        201112        205010
+```
+
+What it does is for the every benchmark from the first run it looks for the benchmark with exactly the same name in the second run, and then compares the results. If the names differ, the benchmark is omitted from the diff.
+As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
+
+2. Compare two different filters of one benchmark
+The program is invoked like:
+
+``` bash
+$ compare.py filters <benchmark> <filter_baseline> <filter_contender> [benchmark options]...
+```
+Where `<benchmark>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
+
+Where `<filter_baseline>` and `<filter_contender>` are the same regex filters that you would pass to the `[--benchmark_filter=<regex>]` parameter of the benchmark binary.
+
+`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
+
+Example output:
+```
+$ ./compare.py filters ./a.out BM_memcpy BM_copy
+RUNNING: ./a.out --benchmark_filter=BM_memcpy --benchmark_out=/tmp/tmpBWKk0k
+Run on (8 X 4000 MHz CPU s)
+2017-11-07 21:37:28
+------------------------------------------------------
+Benchmark               Time           CPU Iterations
+------------------------------------------------------
+BM_memcpy/8            36 ns         36 ns   17891491   211.215MB/s
+BM_memcpy/64           74 ns         74 ns    9400999   825.646MB/s
+BM_memcpy/512          87 ns         87 ns    8027453   5.46126GB/s
+BM_memcpy/1024        111 ns        111 ns    6116853    8.5648GB/s
+BM_memcpy/8192        657 ns        656 ns    1064679   11.6247GB/s
+RUNNING: ./a.out --benchmark_filter=BM_copy --benchmark_out=/tmp/tmpAvWcOM
+Run on (8 X 4000 MHz CPU s)
+2017-11-07 21:37:33
+----------------------------------------------------
+Benchmark             Time           CPU Iterations
+----------------------------------------------------
+BM_copy/8           227 ns        227 ns    3038700   33.6264MB/s
+BM_copy/64         1640 ns       1640 ns     426893   37.2154MB/s
+BM_copy/512       12804 ns      12801 ns      55417   38.1444MB/s
+BM_copy/1024      25409 ns      25407 ns      27516   38.4365MB/s
+BM_copy/8192     202986 ns     202990 ns       3454   38.4871MB/s
+Comparing BM_memcpy to BM_copy (from ./a.out)
+Benchmark                               Time             CPU      Time Old      Time New       CPU Old       CPU New
+--------------------------------------------------------------------------------------------------------------------
+[BM_memcpy vs. BM_copy]/8            +5.2829         +5.2812            36           227            36           227
+[BM_memcpy vs. BM_copy]/64          +21.1719        +21.1856            74          1640            74          1640
+[BM_memcpy vs. BM_copy]/512        +145.6487       +145.6097            87         12804            87         12801
+[BM_memcpy vs. BM_copy]/1024       +227.1860       +227.1776           111         25409           111         25407
+[BM_memcpy vs. BM_copy]/8192       +308.1664       +308.2898           657        202986           656        202990
+```
+
+As you can see, it applies filter to the benchmarks, both when running the benchmark, and before doing the diff. And to make the diff work, the matches are replaced with some common string. Thus, you can compare two different benchmark families within one benchmark binary.
+As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
+
+3. Compare filter one from benchmark one to filter two from benchmark two:
+The program is invoked like:
+
+``` bash
+$ compare.py filters <benchmark_baseline> <filter_baseline> <benchmark_contender> <filter_contender> [benchmark options]...
+```
+
+Where `<benchmark_baseline>` and `<benchmark_contender>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
+
+Where `<filter_baseline>` and `<filter_contender>` are the same regex filters that you would pass to the `[--benchmark_filter=<regex>]` parameter of the benchmark binary.
+
+`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
+
+Example output:
+```
+$ ./compare.py benchmarksfiltered ./a.out BM_memcpy ./a.out BM_copy
+RUNNING: ./a.out --benchmark_filter=BM_memcpy --benchmark_out=/tmp/tmp_FvbYg
+Run on (8 X 4000 MHz CPU s)
+2017-11-07 21:38:27
+------------------------------------------------------
+Benchmark               Time           CPU Iterations
+------------------------------------------------------
+BM_memcpy/8            37 ns         37 ns   18953482   204.118MB/s
+BM_memcpy/64           74 ns         74 ns    9206578   828.245MB/s
+BM_memcpy/512          91 ns         91 ns    8086195   5.25476GB/s
+BM_memcpy/1024        120 ns        120 ns    5804513   7.95662GB/s
+BM_memcpy/8192        664 ns        664 ns    1028363   11.4948GB/s
+RUNNING: ./a.out --benchmark_filter=BM_copy --benchmark_out=/tmp/tmpDfL5iE
+Run on (8 X 4000 MHz CPU s)
+2017-11-07 21:38:32
+----------------------------------------------------
+Benchmark             Time           CPU Iterations
+----------------------------------------------------
+BM_copy/8           230 ns        230 ns    2985909   33.1161MB/s
+BM_copy/64         1654 ns       1653 ns     419408   36.9137MB/s
+BM_copy/512       13122 ns      13120 ns      53403   37.2156MB/s
+BM_copy/1024      26679 ns      26666 ns      26575   36.6218MB/s
+BM_copy/8192     215068 ns     215053 ns       3221   36.3283MB/s
+Comparing BM_memcpy (from ./a.out) to BM_copy (from ./a.out)
+Benchmark                               Time             CPU      Time Old      Time New       CPU Old       CPU New
+--------------------------------------------------------------------------------------------------------------------
+[BM_memcpy vs. BM_copy]/8            +5.1649         +5.1637            37           230            37           230
+[BM_memcpy vs. BM_copy]/64          +21.4352        +21.4374            74          1654            74          1653
+[BM_memcpy vs. BM_copy]/512        +143.6022       +143.5865            91         13122            91         13120
+[BM_memcpy vs. BM_copy]/1024       +221.5903       +221.4790           120         26679           120         26666
+[BM_memcpy vs. BM_copy]/8192       +322.9059       +323.0096           664        215068           664        215053
+```
+This is a mix of the previous two modes, two (potentially different) benchmark binaries are run, and a different filter is applied to each one.
+As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
+
+### U test
+
+If there is a sufficient repetition count of the benchmarks, the tool can do
+a [U Test](https://en.wikipedia.org/wiki/Mann%E2%80%93Whitney_U_test), of the
+null hypothesis that it is equally likely that a randomly selected value from
+one sample will be less than or greater than a randomly selected value from a
+second sample.
+
+If the calculated p-value is below this value is lower than the significance
+level alpha, then the result is said to be statistically significant and the
+null hypothesis is rejected. Which in other words means that the two benchmarks
+aren't identical.
+
+**WARNING**: requires **LARGE** (no less than 9) number of repetitions to be
+meaningful!
diff --git a/3rdparty/benchmark/docs/user_guide.md b/3rdparty/benchmark/docs/user_guide.md
new file mode 100644
index 00000000..34bea690
--- /dev/null
+++ b/3rdparty/benchmark/docs/user_guide.md
@@ -0,0 +1,1200 @@
+# User Guide
+
+## Command Line
+
+[Output Formats](#output-formats)
+
+[Output Files](#output-files)
+
+[Running Benchmarks](#running-benchmarks)
+
+[Running a Subset of Benchmarks](#running-a-subset-of-benchmarks)
+
+[Result Comparison](#result-comparison)
+
+[Extra Context](#extra-context)
+
+## Library
+
+[Runtime and Reporting Considerations](#runtime-and-reporting-considerations)
+
+[Setup/Teardown](#setupteardown)
+
+[Passing Arguments](#passing-arguments)
+
+[Custom Benchmark Name](#custom-benchmark-name)
+
+[Calculating Asymptotic Complexity](#asymptotic-complexity)
+
+[Templated Benchmarks](#templated-benchmarks)
+
+[Fixtures](#fixtures)
+
+[Custom Counters](#custom-counters)
+
+[Multithreaded Benchmarks](#multithreaded-benchmarks)
+
+[CPU Timers](#cpu-timers)
+
+[Manual Timing](#manual-timing)
+
+[Setting the Time Unit](#setting-the-time-unit)
+
+[Random Interleaving](random_interleaving.md)
+
+[User-Requested Performance Counters](perf_counters.md)
+
+[Preventing Optimization](#preventing-optimization)
+
+[Reporting Statistics](#reporting-statistics)
+
+[Custom Statistics](#custom-statistics)
+
+[Using RegisterBenchmark](#using-register-benchmark)
+
+[Exiting with an Error](#exiting-with-an-error)
+
+[A Faster KeepRunning Loop](#a-faster-keep-running-loop)
+
+[Disabling CPU Frequency Scaling](#disabling-cpu-frequency-scaling)
+
+
+<a name="output-formats" />
+
+## Output Formats
+
+The library supports multiple output formats. Use the
+`--benchmark_format=<console|json|csv>` flag (or set the
+`BENCHMARK_FORMAT=<console|json|csv>` environment variable) to set
+the format type. `console` is the default format.
+
+The Console format is intended to be a human readable format. By default
+the format generates color output. Context is output on stderr and the
+tabular data on stdout. Example tabular output looks like:
+
+```
+Benchmark                               Time(ns)    CPU(ns) Iterations
+----------------------------------------------------------------------
+BM_SetInsert/1024/1                        28928      29349      23853  133.097kB/s   33.2742k items/s
+BM_SetInsert/1024/8                        32065      32913      21375  949.487kB/s   237.372k items/s
+BM_SetInsert/1024/10                       33157      33648      21431  1.13369MB/s   290.225k items/s
+```
+
+The JSON format outputs human readable json split into two top level attributes.
+The `context` attribute contains information about the run in general, including
+information about the CPU and the date.
+The `benchmarks` attribute contains a list of every benchmark run. Example json
+output looks like:
+
+```json
+{
+  "context": {
+    "date": "2015/03/17-18:40:25",
+    "num_cpus": 40,
+    "mhz_per_cpu": 2801,
+    "cpu_scaling_enabled": false,
+    "build_type": "debug"
+  },
+  "benchmarks": [
+    {
+      "name": "BM_SetInsert/1024/1",
+      "iterations": 94877,
+      "real_time": 29275,
+      "cpu_time": 29836,
+      "bytes_per_second": 134066,
+      "items_per_second": 33516
+    },
+    {
+      "name": "BM_SetInsert/1024/8",
+      "iterations": 21609,
+      "real_time": 32317,
+      "cpu_time": 32429,
+      "bytes_per_second": 986770,
+      "items_per_second": 246693
+    },
+    {
+      "name": "BM_SetInsert/1024/10",
+      "iterations": 21393,
+      "real_time": 32724,
+      "cpu_time": 33355,
+      "bytes_per_second": 1199226,
+      "items_per_second": 299807
+    }
+  ]
+}
+```
+
+The CSV format outputs comma-separated values. The `context` is output on stderr
+and the CSV itself on stdout. Example CSV output looks like:
+
+```
+name,iterations,real_time,cpu_time,bytes_per_second,items_per_second,label
+"BM_SetInsert/1024/1",65465,17890.7,8407.45,475768,118942,
+"BM_SetInsert/1024/8",116606,18810.1,9766.64,3.27646e+06,819115,
+"BM_SetInsert/1024/10",106365,17238.4,8421.53,4.74973e+06,1.18743e+06,
+```
+
+<a name="output-files" />
+
+## Output Files
+
+Write benchmark results to a file with the `--benchmark_out=<filename>` option
+(or set `BENCHMARK_OUT`). Specify the output format with
+`--benchmark_out_format={json|console|csv}` (or set
+`BENCHMARK_OUT_FORMAT={json|console|csv}`). Note that the 'csv' reporter is
+deprecated and the saved `.csv` file
+[is not parsable](https://github.com/google/benchmark/issues/794) by csv
+parsers.
+
+Specifying `--benchmark_out` does not suppress the console output.
+
+<a name="running-benchmarks" />
+
+## Running Benchmarks
+
+Benchmarks are executed by running the produced binaries. Benchmarks binaries,
+by default, accept options that may be specified either through their command
+line interface or by setting environment variables before execution. For every
+`--option_flag=<value>` CLI switch, a corresponding environment variable
+`OPTION_FLAG=<value>` exist and is used as default if set (CLI switches always
+ prevails). A complete list of CLI options is available running benchmarks
+ with the `--help` switch.
+
+<a name="running-a-subset-of-benchmarks" />
+
+## Running a Subset of Benchmarks
+
+The `--benchmark_filter=<regex>` option (or `BENCHMARK_FILTER=<regex>`
+environment variable) can be used to only run the benchmarks that match
+the specified `<regex>`. For example:
+
+```bash
+$ ./run_benchmarks.x --benchmark_filter=BM_memcpy/32
+Run on (1 X 2300 MHz CPU )
+2016-06-25 19:34:24
+Benchmark              Time           CPU Iterations
+----------------------------------------------------
+BM_memcpy/32          11 ns         11 ns   79545455
+BM_memcpy/32k       2181 ns       2185 ns     324074
+BM_memcpy/32          12 ns         12 ns   54687500
+BM_memcpy/32k       1834 ns       1837 ns     357143
+```
+
+<a name="result-comparison" />
+
+## Result comparison
+
+It is possible to compare the benchmarking results.
+See [Additional Tooling Documentation](tools.md)
+
+<a name="extra-context" />
+
+## Extra Context
+
+Sometimes it's useful to add extra context to the content printed before the
+results. By default this section includes information about the CPU on which
+the benchmarks are running. If you do want to add more context, you can use
+the `benchmark_context` command line flag:
+
+```bash
+$ ./run_benchmarks --benchmark_context=pwd=`pwd`
+Run on (1 x 2300 MHz CPU)
+pwd: /home/user/benchmark/
+Benchmark              Time           CPU Iterations
+----------------------------------------------------
+BM_memcpy/32          11 ns         11 ns   79545455
+BM_memcpy/32k       2181 ns       2185 ns     324074
+```
+
+You can get the same effect with the API:
+
+```c++
+  benchmark::AddCustomContext("foo", "bar");
+```
+
+Note that attempts to add a second value with the same key will fail with an
+error message.
+
+<a name="runtime-and-reporting-considerations" />
+
+## Runtime and Reporting Considerations
+
+When the benchmark binary is executed, each benchmark function is run serially.
+The number of iterations to run is determined dynamically by running the
+benchmark a few times and measuring the time taken and ensuring that the
+ultimate result will be statistically stable. As such, faster benchmark
+functions will be run for more iterations than slower benchmark functions, and
+the number of iterations is thus reported.
+
+In all cases, the number of iterations for which the benchmark is run is
+governed by the amount of time the benchmark takes. Concretely, the number of
+iterations is at least one, not more than 1e9, until CPU time is greater than
+the minimum time, or the wallclock time is 5x minimum time. The minimum time is
+set per benchmark by calling `MinTime` on the registered benchmark object.
+
+Average timings are then reported over the iterations run. If multiple
+repetitions are requested using the `--benchmark_repetitions` command-line
+option, or at registration time, the benchmark function will be run several
+times and statistical results across these repetitions will also be reported.
+
+As well as the per-benchmark entries, a preamble in the report will include
+information about the machine on which the benchmarks are run.
+
+<a name="setup-teardown" />
+
+## Setup/Teardown
+
+Global setup/teardown specific to each benchmark can be done by
+passing a callback to Setup/Teardown:
+
+The setup/teardown callbacks will be invoked once for each benchmark.
+If the benchmark is multi-threaded (will run in k threads), they will be invoked exactly once before
+each run with k threads.
+If the benchmark uses different size groups of threads, the above will be true for each size group.
+
+Eg.,
+
+```c++
+static void DoSetup(const benchmark::State& state) {
+}
+
+static void DoTeardown(const benchmark::State& state) {
+}
+
+static void BM_func(benchmark::State& state) {...}
+
+BENCHMARK(BM_func)->Arg(1)->Arg(3)->Threads(16)->Threads(32)->Setup(DoSetup)->Teardown(DoTeardown);
+
+```
+
+In this example, `DoSetup` and `DoTearDown` will be invoked 4 times each,
+specifically, once for each of this family:
+ - BM_func_Arg_1_Threads_16, BM_func_Arg_1_Threads_32
+ - BM_func_Arg_3_Threads_16, BM_func_Arg_3_Threads_32
+
+<a name="passing-arguments" />
+
+## Passing Arguments
+
+Sometimes a family of benchmarks can be implemented with just one routine that
+takes an extra argument to specify which one of the family of benchmarks to
+run. For example, the following code defines a family of benchmarks for
+measuring the speed of `memcpy()` calls of different lengths:
+
+```c++
+static void BM_memcpy(benchmark::State& state) {
+  char* src = new char[state.range(0)];
+  char* dst = new char[state.range(0)];
+  memset(src, 'x', state.range(0));
+  for (auto _ : state)
+    memcpy(dst, src, state.range(0));
+  state.SetBytesProcessed(int64_t(state.iterations()) *
+                          int64_t(state.range(0)));
+  delete[] src;
+  delete[] dst;
+}
+BENCHMARK(BM_memcpy)->Arg(8)->Arg(64)->Arg(512)->Arg(1<<10)->Arg(8<<10);
+```
+
+The preceding code is quite repetitive, and can be replaced with the following
+short-hand. The following invocation will pick a few appropriate arguments in
+the specified range and will generate a benchmark for each such argument.
+
+```c++
+BENCHMARK(BM_memcpy)->Range(8, 8<<10);
+```
+
+By default the arguments in the range are generated in multiples of eight and
+the command above selects [ 8, 64, 512, 4k, 8k ]. In the following code the
+range multiplier is changed to multiples of two.
+
+```c++
+BENCHMARK(BM_memcpy)->RangeMultiplier(2)->Range(8, 8<<10);
+```
+
+Now arguments generated are [ 8, 16, 32, 64, 128, 256, 512, 1024, 2k, 4k, 8k ].
+
+The preceding code shows a method of defining a sparse range.  The following
+example shows a method of defining a dense range. It is then used to benchmark
+the performance of `std::vector` initialization for uniformly increasing sizes.
+
+```c++
+static void BM_DenseRange(benchmark::State& state) {
+  for(auto _ : state) {
+    std::vector<int> v(state.range(0), state.range(0));
+    benchmark::DoNotOptimize(v.data());
+    benchmark::ClobberMemory();
+  }
+}
+BENCHMARK(BM_DenseRange)->DenseRange(0, 1024, 128);
+```
+
+Now arguments generated are [ 0, 128, 256, 384, 512, 640, 768, 896, 1024 ].
+
+You might have a benchmark that depends on two or more inputs. For example, the
+following code defines a family of benchmarks for measuring the speed of set
+insertion.
+
+```c++
+static void BM_SetInsert(benchmark::State& state) {
+  std::set<int> data;
+  for (auto _ : state) {
+    state.PauseTiming();
+    data = ConstructRandomSet(state.range(0));
+    state.ResumeTiming();
+    for (int j = 0; j < state.range(1); ++j)
+      data.insert(RandomNumber());
+  }
+}
+BENCHMARK(BM_SetInsert)
+    ->Args({1<<10, 128})
+    ->Args({2<<10, 128})
+    ->Args({4<<10, 128})
+    ->Args({8<<10, 128})
+    ->Args({1<<10, 512})
+    ->Args({2<<10, 512})
+    ->Args({4<<10, 512})
+    ->Args({8<<10, 512});
+```
+
+The preceding code is quite repetitive, and can be replaced with the following
+short-hand. The following macro will pick a few appropriate arguments in the
+product of the two specified ranges and will generate a benchmark for each such
+pair.
+
+{% raw %}
+```c++
+BENCHMARK(BM_SetInsert)->Ranges({{1<<10, 8<<10}, {128, 512}});
+```
+{% endraw %}
+
+Some benchmarks may require specific argument values that cannot be expressed
+with `Ranges`. In this case, `ArgsProduct` offers the ability to generate a
+benchmark input for each combination in the product of the supplied vectors.
+
+{% raw %}
+```c++
+BENCHMARK(BM_SetInsert)
+    ->ArgsProduct({{1<<10, 3<<10, 8<<10}, {20, 40, 60, 80}})
+// would generate the same benchmark arguments as
+BENCHMARK(BM_SetInsert)
+    ->Args({1<<10, 20})
+    ->Args({3<<10, 20})
+    ->Args({8<<10, 20})
+    ->Args({3<<10, 40})
+    ->Args({8<<10, 40})
+    ->Args({1<<10, 40})
+    ->Args({1<<10, 60})
+    ->Args({3<<10, 60})
+    ->Args({8<<10, 60})
+    ->Args({1<<10, 80})
+    ->Args({3<<10, 80})
+    ->Args({8<<10, 80});
+```
+{% endraw %}
+
+For the most common scenarios, helper methods for creating a list of
+integers for a given sparse or dense range are provided.
+
+```c++
+BENCHMARK(BM_SetInsert)
+    ->ArgsProduct({
+      benchmark::CreateRange(8, 128, /*multi=*/2),
+      benchmark::CreateDenseRange(1, 4, /*step=*/1)
+    })
+// would generate the same benchmark arguments as
+BENCHMARK(BM_SetInsert)
+    ->ArgsProduct({
+      {8, 16, 32, 64, 128},
+      {1, 2, 3, 4}
+    });
+```
+
+For more complex patterns of inputs, passing a custom function to `Apply` allows
+programmatic specification of an arbitrary set of arguments on which to run the
+benchmark. The following example enumerates a dense range on one parameter,
+and a sparse range on the second.
+
+```c++
+static void CustomArguments(benchmark::internal::Benchmark* b) {
+  for (int i = 0; i <= 10; ++i)
+    for (int j = 32; j <= 1024*1024; j *= 8)
+      b->Args({i, j});
+}
+BENCHMARK(BM_SetInsert)->Apply(CustomArguments);
+```
+
+### Passing Arbitrary Arguments to a Benchmark
+
+In C++11 it is possible to define a benchmark that takes an arbitrary number
+of extra arguments. The `BENCHMARK_CAPTURE(func, test_case_name, ...args)`
+macro creates a benchmark that invokes `func`  with the `benchmark::State` as
+the first argument followed by the specified `args...`.
+The `test_case_name` is appended to the name of the benchmark and
+should describe the values passed.
+
+```c++
+template <class ...ExtraArgs>
+void BM_takes_args(benchmark::State& state, ExtraArgs&&... extra_args) {
+  [...]
+}
+// Registers a benchmark named "BM_takes_args/int_string_test" that passes
+// the specified values to `extra_args`.
+BENCHMARK_CAPTURE(BM_takes_args, int_string_test, 42, std::string("abc"));
+```
+
+Note that elements of `...args` may refer to global variables. Users should
+avoid modifying global state inside of a benchmark.
+
+<a name="asymptotic-complexity" />
+
+## Calculating Asymptotic Complexity (Big O)
+
+Asymptotic complexity might be calculated for a family of benchmarks. The
+following code will calculate the coefficient for the high-order term in the
+running time and the normalized root-mean square error of string comparison.
+
+```c++
+static void BM_StringCompare(benchmark::State& state) {
+  std::string s1(state.range(0), '-');
+  std::string s2(state.range(0), '-');
+  for (auto _ : state) {
+    benchmark::DoNotOptimize(s1.compare(s2));
+  }
+  state.SetComplexityN(state.range(0));
+}
+BENCHMARK(BM_StringCompare)
+    ->RangeMultiplier(2)->Range(1<<10, 1<<18)->Complexity(benchmark::oN);
+```
+
+As shown in the following invocation, asymptotic complexity might also be
+calculated automatically.
+
+```c++
+BENCHMARK(BM_StringCompare)
+    ->RangeMultiplier(2)->Range(1<<10, 1<<18)->Complexity();
+```
+
+The following code will specify asymptotic complexity with a lambda function,
+that might be used to customize high-order term calculation.
+
+```c++
+BENCHMARK(BM_StringCompare)->RangeMultiplier(2)
+    ->Range(1<<10, 1<<18)->Complexity([](benchmark::IterationCount n)->double{return n; });
+```
+
+<a name="custom-benchmark-name" />
+
+## Custom Benchmark Name
+
+You can change the benchmark's name as follows:
+
+```c++
+BENCHMARK(BM_memcpy)->Name("memcpy")->RangeMultiplier(2)->Range(8, 8<<10);
+```
+
+The invocation will execute the benchmark as before using `BM_memcpy` but changes
+the prefix in the report to `memcpy`.
+
+<a name="templated-benchmarks" />
+
+## Templated Benchmarks
+
+This example produces and consumes messages of size `sizeof(v)` `range_x`
+times. It also outputs throughput in the absence of multiprogramming.
+
+```c++
+template <class Q> void BM_Sequential(benchmark::State& state) {
+  Q q;
+  typename Q::value_type v;
+  for (auto _ : state) {
+    for (int i = state.range(0); i--; )
+      q.push(v);
+    for (int e = state.range(0); e--; )
+      q.Wait(&v);
+  }
+  // actually messages, not bytes:
+  state.SetBytesProcessed(
+      static_cast<int64_t>(state.iterations())*state.range(0));
+}
+// C++03
+BENCHMARK_TEMPLATE(BM_Sequential, WaitQueue<int>)->Range(1<<0, 1<<10);
+
+// C++11 or newer, you can use the BENCHMARK macro with template parameters:
+BENCHMARK(BM_Sequential<WaitQueue<int>>)->Range(1<<0, 1<<10);
+
+```
+
+Three macros are provided for adding benchmark templates.
+
+```c++
+#ifdef BENCHMARK_HAS_CXX11
+#define BENCHMARK(func<...>) // Takes any number of parameters.
+#else // C++ < C++11
+#define BENCHMARK_TEMPLATE(func, arg1)
+#endif
+#define BENCHMARK_TEMPLATE1(func, arg1)
+#define BENCHMARK_TEMPLATE2(func, arg1, arg2)
+```
+
+<a name="fixtures" />
+
+## Fixtures
+
+Fixture tests are created by first defining a type that derives from
+`::benchmark::Fixture` and then creating/registering the tests using the
+following macros:
+
+* `BENCHMARK_F(ClassName, Method)`
+* `BENCHMARK_DEFINE_F(ClassName, Method)`
+* `BENCHMARK_REGISTER_F(ClassName, Method)`
+
+For Example:
+
+```c++
+class MyFixture : public benchmark::Fixture {
+public:
+  void SetUp(const ::benchmark::State& state) {
+  }
+
+  void TearDown(const ::benchmark::State& state) {
+  }
+};
+
+BENCHMARK_F(MyFixture, FooTest)(benchmark::State& st) {
+   for (auto _ : st) {
+     ...
+  }
+}
+
+BENCHMARK_DEFINE_F(MyFixture, BarTest)(benchmark::State& st) {
+   for (auto _ : st) {
+     ...
+  }
+}
+/* BarTest is NOT registered */
+BENCHMARK_REGISTER_F(MyFixture, BarTest)->Threads(2);
+/* BarTest is now registered */
+```
+
+### Templated Fixtures
+
+Also you can create templated fixture by using the following macros:
+
+* `BENCHMARK_TEMPLATE_F(ClassName, Method, ...)`
+* `BENCHMARK_TEMPLATE_DEFINE_F(ClassName, Method, ...)`
+
+For example:
+
+```c++
+template<typename T>
+class MyFixture : public benchmark::Fixture {};
+
+BENCHMARK_TEMPLATE_F(MyFixture, IntTest, int)(benchmark::State& st) {
+   for (auto _ : st) {
+     ...
+  }
+}
+
+BENCHMARK_TEMPLATE_DEFINE_F(MyFixture, DoubleTest, double)(benchmark::State& st) {
+   for (auto _ : st) {
+     ...
+  }
+}
+
+BENCHMARK_REGISTER_F(MyFixture, DoubleTest)->Threads(2);
+```
+
+<a name="custom-counters" />
+
+## Custom Counters
+
+You can add your own counters with user-defined names. The example below
+will add columns "Foo", "Bar" and "Baz" in its output:
+
+```c++
+static void UserCountersExample1(benchmark::State& state) {
+  double numFoos = 0, numBars = 0, numBazs = 0;
+  for (auto _ : state) {
+    // ... count Foo,Bar,Baz events
+  }
+  state.counters["Foo"] = numFoos;
+  state.counters["Bar"] = numBars;
+  state.counters["Baz"] = numBazs;
+}
+```
+
+The `state.counters` object is a `std::map` with `std::string` keys
+and `Counter` values. The latter is a `double`-like class, via an implicit
+conversion to `double&`. Thus you can use all of the standard arithmetic
+assignment operators (`=,+=,-=,*=,/=`) to change the value of each counter.
+
+In multithreaded benchmarks, each counter is set on the calling thread only.
+When the benchmark finishes, the counters from each thread will be summed;
+the resulting sum is the value which will be shown for the benchmark.
+
+The `Counter` constructor accepts three parameters: the value as a `double`
+; a bit flag which allows you to show counters as rates, and/or as per-thread
+iteration, and/or as per-thread averages, and/or iteration invariants,
+and/or finally inverting the result; and a flag specifying the 'unit' - i.e.
+is 1k a 1000 (default, `benchmark::Counter::OneK::kIs1000`), or 1024
+(`benchmark::Counter::OneK::kIs1024`)?
+
+```c++
+  // sets a simple counter
+  state.counters["Foo"] = numFoos;
+
+  // Set the counter as a rate. It will be presented divided
+  // by the duration of the benchmark.
+  // Meaning: per one second, how many 'foo's are processed?
+  state.counters["FooRate"] = Counter(numFoos, benchmark::Counter::kIsRate);
+
+  // Set the counter as a rate. It will be presented divided
+  // by the duration of the benchmark, and the result inverted.
+  // Meaning: how many seconds it takes to process one 'foo'?
+  state.counters["FooInvRate"] = Counter(numFoos, benchmark::Counter::kIsRate | benchmark::Counter::kInvert);
+
+  // Set the counter as a thread-average quantity. It will
+  // be presented divided by the number of threads.
+  state.counters["FooAvg"] = Counter(numFoos, benchmark::Counter::kAvgThreads);
+
+  // There's also a combined flag:
+  state.counters["FooAvgRate"] = Counter(numFoos,benchmark::Counter::kAvgThreadsRate);
+
+  // This says that we process with the rate of state.range(0) bytes every iteration:
+  state.counters["BytesProcessed"] = Counter(state.range(0), benchmark::Counter::kIsIterationInvariantRate, benchmark::Counter::OneK::kIs1024);
+```
+
+When you're compiling in C++11 mode or later you can use `insert()` with
+`std::initializer_list`:
+
+{% raw %}
+```c++
+  // With C++11, this can be done:
+  state.counters.insert({{"Foo", numFoos}, {"Bar", numBars}, {"Baz", numBazs}});
+  // ... instead of:
+  state.counters["Foo"] = numFoos;
+  state.counters["Bar"] = numBars;
+  state.counters["Baz"] = numBazs;
+```
+{% endraw %}
+
+### Counter Reporting
+
+When using the console reporter, by default, user counters are printed at
+the end after the table, the same way as ``bytes_processed`` and
+``items_processed``. This is best for cases in which there are few counters,
+or where there are only a couple of lines per benchmark. Here's an example of
+the default output:
+
+```
+------------------------------------------------------------------------------
+Benchmark                        Time           CPU Iterations UserCounters...
+------------------------------------------------------------------------------
+BM_UserCounter/threads:8      2248 ns      10277 ns      68808 Bar=16 Bat=40 Baz=24 Foo=8
+BM_UserCounter/threads:1      9797 ns       9788 ns      71523 Bar=2 Bat=5 Baz=3 Foo=1024m
+BM_UserCounter/threads:2      4924 ns       9842 ns      71036 Bar=4 Bat=10 Baz=6 Foo=2
+BM_UserCounter/threads:4      2589 ns      10284 ns      68012 Bar=8 Bat=20 Baz=12 Foo=4
+BM_UserCounter/threads:8      2212 ns      10287 ns      68040 Bar=16 Bat=40 Baz=24 Foo=8
+BM_UserCounter/threads:16     1782 ns      10278 ns      68144 Bar=32 Bat=80 Baz=48 Foo=16
+BM_UserCounter/threads:32     1291 ns      10296 ns      68256 Bar=64 Bat=160 Baz=96 Foo=32
+BM_UserCounter/threads:4      2615 ns      10307 ns      68040 Bar=8 Bat=20 Baz=12 Foo=4
+BM_Factorial                    26 ns         26 ns   26608979 40320
+BM_Factorial/real_time          26 ns         26 ns   26587936 40320
+BM_CalculatePiRange/1           16 ns         16 ns   45704255 0
+BM_CalculatePiRange/8           73 ns         73 ns    9520927 3.28374
+BM_CalculatePiRange/64         609 ns        609 ns    1140647 3.15746
+BM_CalculatePiRange/512       4900 ns       4901 ns     142696 3.14355
+```
+
+If this doesn't suit you, you can print each counter as a table column by
+passing the flag `--benchmark_counters_tabular=true` to the benchmark
+application. This is best for cases in which there are a lot of counters, or
+a lot of lines per individual benchmark. Note that this will trigger a
+reprinting of the table header any time the counter set changes between
+individual benchmarks. Here's an example of corresponding output when
+`--benchmark_counters_tabular=true` is passed:
+
+```
+---------------------------------------------------------------------------------------
+Benchmark                        Time           CPU Iterations    Bar   Bat   Baz   Foo
+---------------------------------------------------------------------------------------
+BM_UserCounter/threads:8      2198 ns       9953 ns      70688     16    40    24     8
+BM_UserCounter/threads:1      9504 ns       9504 ns      73787      2     5     3     1
+BM_UserCounter/threads:2      4775 ns       9550 ns      72606      4    10     6     2
+BM_UserCounter/threads:4      2508 ns       9951 ns      70332      8    20    12     4
+BM_UserCounter/threads:8      2055 ns       9933 ns      70344     16    40    24     8
+BM_UserCounter/threads:16     1610 ns       9946 ns      70720     32    80    48    16
+BM_UserCounter/threads:32     1192 ns       9948 ns      70496     64   160    96    32
+BM_UserCounter/threads:4      2506 ns       9949 ns      70332      8    20    12     4
+--------------------------------------------------------------
+Benchmark                        Time           CPU Iterations
+--------------------------------------------------------------
+BM_Factorial                    26 ns         26 ns   26392245 40320
+BM_Factorial/real_time          26 ns         26 ns   26494107 40320
+BM_CalculatePiRange/1           15 ns         15 ns   45571597 0
+BM_CalculatePiRange/8           74 ns         74 ns    9450212 3.28374
+BM_CalculatePiRange/64         595 ns        595 ns    1173901 3.15746
+BM_CalculatePiRange/512       4752 ns       4752 ns     147380 3.14355
+BM_CalculatePiRange/4k       37970 ns      37972 ns      18453 3.14184
+BM_CalculatePiRange/32k     303733 ns     303744 ns       2305 3.14162
+BM_CalculatePiRange/256k   2434095 ns    2434186 ns        288 3.1416
+BM_CalculatePiRange/1024k  9721140 ns    9721413 ns         71 3.14159
+BM_CalculatePi/threads:8      2255 ns       9943 ns      70936
+```
+
+Note above the additional header printed when the benchmark changes from
+``BM_UserCounter`` to ``BM_Factorial``. This is because ``BM_Factorial`` does
+not have the same counter set as ``BM_UserCounter``.
+
+<a name="multithreaded-benchmarks"/>
+
+## Multithreaded Benchmarks
+
+In a multithreaded test (benchmark invoked by multiple threads simultaneously),
+it is guaranteed that none of the threads will start until all have reached
+the start of the benchmark loop, and all will have finished before any thread
+exits the benchmark loop. (This behavior is also provided by the `KeepRunning()`
+API) As such, any global setup or teardown can be wrapped in a check against the thread
+index:
+
+```c++
+static void BM_MultiThreaded(benchmark::State& state) {
+  if (state.thread_index() == 0) {
+    // Setup code here.
+  }
+  for (auto _ : state) {
+    // Run the test as normal.
+  }
+  if (state.thread_index() == 0) {
+    // Teardown code here.
+  }
+}
+BENCHMARK(BM_MultiThreaded)->Threads(2);
+```
+
+If the benchmarked code itself uses threads and you want to compare it to
+single-threaded code, you may want to use real-time ("wallclock") measurements
+for latency comparisons:
+
+```c++
+BENCHMARK(BM_test)->Range(8, 8<<10)->UseRealTime();
+```
+
+Without `UseRealTime`, CPU time is used by default.
+
+<a name="cpu-timers" />
+
+## CPU Timers
+
+By default, the CPU timer only measures the time spent by the main thread.
+If the benchmark itself uses threads internally, this measurement may not
+be what you are looking for. Instead, there is a way to measure the total
+CPU usage of the process, by all the threads.
+
+```c++
+void callee(int i);
+
+static void MyMain(int size) {
+#pragma omp parallel for
+  for(int i = 0; i < size; i++)
+    callee(i);
+}
+
+static void BM_OpenMP(benchmark::State& state) {
+  for (auto _ : state)
+    MyMain(state.range(0));
+}
+
+// Measure the time spent by the main thread, use it to decide for how long to
+// run the benchmark loop. Depending on the internal implementation detail may
+// measure to anywhere from near-zero (the overhead spent before/after work
+// handoff to worker thread[s]) to the whole single-thread time.
+BENCHMARK(BM_OpenMP)->Range(8, 8<<10);
+
+// Measure the user-visible time, the wall clock (literally, the time that
+// has passed on the clock on the wall), use it to decide for how long to
+// run the benchmark loop. This will always be meaningful, an will match the
+// time spent by the main thread in single-threaded case, in general decreasing
+// with the number of internal threads doing the work.
+BENCHMARK(BM_OpenMP)->Range(8, 8<<10)->UseRealTime();
+
+// Measure the total CPU consumption, use it to decide for how long to
+// run the benchmark loop. This will always measure to no less than the
+// time spent by the main thread in single-threaded case.
+BENCHMARK(BM_OpenMP)->Range(8, 8<<10)->MeasureProcessCPUTime();
+
+// A mixture of the last two. Measure the total CPU consumption, but use the
+// wall clock to decide for how long to run the benchmark loop.
+BENCHMARK(BM_OpenMP)->Range(8, 8<<10)->MeasureProcessCPUTime()->UseRealTime();
+```
+
+### Controlling Timers
+
+Normally, the entire duration of the work loop (`for (auto _ : state) {}`)
+is measured. But sometimes, it is necessary to do some work inside of
+that loop, every iteration, but without counting that time to the benchmark time.
+That is possible, although it is not recommended, since it has high overhead.
+
+{% raw %}
+```c++
+static void BM_SetInsert_With_Timer_Control(benchmark::State& state) {
+  std::set<int> data;
+  for (auto _ : state) {
+    state.PauseTiming(); // Stop timers. They will not count until they are resumed.
+    data = ConstructRandomSet(state.range(0)); // Do something that should not be measured
+    state.ResumeTiming(); // And resume timers. They are now counting again.
+    // The rest will be measured.
+    for (int j = 0; j < state.range(1); ++j)
+      data.insert(RandomNumber());
+  }
+}
+BENCHMARK(BM_SetInsert_With_Timer_Control)->Ranges({{1<<10, 8<<10}, {128, 512}});
+```
+{% endraw %}
+
+<a name="manual-timing" />
+
+## Manual Timing
+
+For benchmarking something for which neither CPU time nor real-time are
+correct or accurate enough, completely manual timing is supported using
+the `UseManualTime` function.
+
+When `UseManualTime` is used, the benchmarked code must call
+`SetIterationTime` once per iteration of the benchmark loop to
+report the manually measured time.
+
+An example use case for this is benchmarking GPU execution (e.g. OpenCL
+or CUDA kernels, OpenGL or Vulkan or Direct3D draw calls), which cannot
+be accurately measured using CPU time or real-time. Instead, they can be
+measured accurately using a dedicated API, and these measurement results
+can be reported back with `SetIterationTime`.
+
+```c++
+static void BM_ManualTiming(benchmark::State& state) {
+  int microseconds = state.range(0);
+  std::chrono::duration<double, std::micro> sleep_duration {
+    static_cast<double>(microseconds)
+  };
+
+  for (auto _ : state) {
+    auto start = std::chrono::high_resolution_clock::now();
+    // Simulate some useful workload with a sleep
+    std::this_thread::sleep_for(sleep_duration);
+    auto end = std::chrono::high_resolution_clock::now();
+
+    auto elapsed_seconds =
+      std::chrono::duration_cast<std::chrono::duration<double>>(
+        end - start);
+
+    state.SetIterationTime(elapsed_seconds.count());
+  }
+}
+BENCHMARK(BM_ManualTiming)->Range(1, 1<<17)->UseManualTime();
+```
+
+<a name="setting-the-time-unit" />
+
+## Setting the Time Unit
+
+If a benchmark runs a few milliseconds it may be hard to visually compare the
+measured times, since the output data is given in nanoseconds per default. In
+order to manually set the time unit, you can specify it manually:
+
+```c++
+BENCHMARK(BM_test)->Unit(benchmark::kMillisecond);
+```
+
+<a name="preventing-optimization" />
+
+## Preventing Optimization
+
+To prevent a value or expression from being optimized away by the compiler
+the `benchmark::DoNotOptimize(...)` and `benchmark::ClobberMemory()`
+functions can be used.
+
+```c++
+static void BM_test(benchmark::State& state) {
+  for (auto _ : state) {
+      int x = 0;
+      for (int i=0; i < 64; ++i) {
+        benchmark::DoNotOptimize(x += i);
+      }
+  }
+}
+```
+
+`DoNotOptimize(<expr>)` forces the  *result* of `<expr>` to be stored in either
+memory or a register. For GNU based compilers it acts as read/write barrier
+for global memory. More specifically it forces the compiler to flush pending
+writes to memory and reload any other values as necessary.
+
+Note that `DoNotOptimize(<expr>)` does not prevent optimizations on `<expr>`
+in any way. `<expr>` may even be removed entirely when the result is already
+known. For example:
+
+```c++
+  /* Example 1: `<expr>` is removed entirely. */
+  int foo(int x) { return x + 42; }
+  while (...) DoNotOptimize(foo(0)); // Optimized to DoNotOptimize(42);
+
+  /*  Example 2: Result of '<expr>' is only reused */
+  int bar(int) __attribute__((const));
+  while (...) DoNotOptimize(bar(0)); // Optimized to:
+  // int __result__ = bar(0);
+  // while (...) DoNotOptimize(__result__);
+```
+
+The second tool for preventing optimizations is `ClobberMemory()`. In essence
+`ClobberMemory()` forces the compiler to perform all pending writes to global
+memory. Memory managed by block scope objects must be "escaped" using
+`DoNotOptimize(...)` before it can be clobbered. In the below example
+`ClobberMemory()` prevents the call to `v.push_back(42)` from being optimized
+away.
+
+```c++
+static void BM_vector_push_back(benchmark::State& state) {
+  for (auto _ : state) {
+    std::vector<int> v;
+    v.reserve(1);
+    benchmark::DoNotOptimize(v.data()); // Allow v.data() to be clobbered.
+    v.push_back(42);
+    benchmark::ClobberMemory(); // Force 42 to be written to memory.
+  }
+}
+```
+
+Note that `ClobberMemory()` is only available for GNU or MSVC based compilers.
+
+<a name="reporting-statistics" />
+
+## Statistics: Reporting the Mean, Median and Standard Deviation / Coefficient of variation of Repeated Benchmarks
+
+By default each benchmark is run once and that single result is reported.
+However benchmarks are often noisy and a single result may not be representative
+of the overall behavior. For this reason it's possible to repeatedly rerun the
+benchmark.
+
+The number of runs of each benchmark is specified globally by the
+`--benchmark_repetitions` flag or on a per benchmark basis by calling
+`Repetitions` on the registered benchmark object. When a benchmark is run more
+than once the mean, median, standard deviation and coefficient of variation
+of the runs will be reported.
+
+Additionally the `--benchmark_report_aggregates_only={true|false}`,
+`--benchmark_display_aggregates_only={true|false}` flags or
+`ReportAggregatesOnly(bool)`, `DisplayAggregatesOnly(bool)` functions can be
+used to change how repeated tests are reported. By default the result of each
+repeated run is reported. When `report aggregates only` option is `true`,
+only the aggregates (i.e. mean, median, standard deviation and coefficient
+of variation, maybe complexity measurements if they were requested) of the runs
+is reported, to both the reporters - standard output (console), and the file.
+However when only the `display aggregates only` option is `true`,
+only the aggregates are displayed in the standard output, while the file
+output still contains everything.
+Calling `ReportAggregatesOnly(bool)` / `DisplayAggregatesOnly(bool)` on a
+registered benchmark object overrides the value of the appropriate flag for that
+benchmark.
+
+<a name="custom-statistics" />
+
+## Custom Statistics
+
+While having these aggregates is nice, this may not be enough for everyone.
+For example you may want to know what the largest observation is, e.g. because
+you have some real-time constraints. This is easy. The following code will
+specify a custom statistic to be calculated, defined by a lambda function.
+
+```c++
+void BM_spin_empty(benchmark::State& state) {
+  for (auto _ : state) {
+    for (int x = 0; x < state.range(0); ++x) {
+      benchmark::DoNotOptimize(x);
+    }
+  }
+}
+
+BENCHMARK(BM_spin_empty)
+  ->ComputeStatistics("max", [](const std::vector<double>& v) -> double {
+    return *(std::max_element(std::begin(v), std::end(v)));
+  })
+  ->Arg(512);
+```
+
+While usually the statistics produce values in time units,
+you can also produce percentages:
+
+```c++
+void BM_spin_empty(benchmark::State& state) {
+  for (auto _ : state) {
+    for (int x = 0; x < state.range(0); ++x) {
+      benchmark::DoNotOptimize(x);
+    }
+  }
+}
+
+BENCHMARK(BM_spin_empty)
+  ->ComputeStatistics("ratio", [](const std::vector<double>& v) -> double {
+    return std::begin(v) / std::end(v);
+  }, benchmark::StatisticUnit::Percentage)
+  ->Arg(512);
+```
+
+<a name="using-register-benchmark" />
+
+## Using RegisterBenchmark(name, fn, args...)
+
+The `RegisterBenchmark(name, func, args...)` function provides an alternative
+way to create and register benchmarks.
+`RegisterBenchmark(name, func, args...)` creates, registers, and returns a
+pointer to a new benchmark with the specified `name` that invokes
+`func(st, args...)` where `st` is a `benchmark::State` object.
+
+Unlike the `BENCHMARK` registration macros, which can only be used at the global
+scope, the `RegisterBenchmark` can be called anywhere. This allows for
+benchmark tests to be registered programmatically.
+
+Additionally `RegisterBenchmark` allows any callable object to be registered
+as a benchmark. Including capturing lambdas and function objects.
+
+For Example:
+```c++
+auto BM_test = [](benchmark::State& st, auto Inputs) { /* ... */ };
+
+int main(int argc, char** argv) {
+  for (auto& test_input : { /* ... */ })
+      benchmark::RegisterBenchmark(test_input.name(), BM_test, test_input);
+  benchmark::Initialize(&argc, argv);
+  benchmark::RunSpecifiedBenchmarks();
+  benchmark::Shutdown();
+}
+```
+
+<a name="exiting-with-an-error" />
+
+## Exiting with an Error
+
+When errors caused by external influences, such as file I/O and network
+communication, occur within a benchmark the
+`State::SkipWithError(const char* msg)` function can be used to skip that run
+of benchmark and report the error. Note that only future iterations of the
+`KeepRunning()` are skipped. For the ranged-for version of the benchmark loop
+Users must explicitly exit the loop, otherwise all iterations will be performed.
+Users may explicitly return to exit the benchmark immediately.
+
+The `SkipWithError(...)` function may be used at any point within the benchmark,
+including before and after the benchmark loop. Moreover, if `SkipWithError(...)`
+has been used, it is not required to reach the benchmark loop and one may return
+from the benchmark function early.
+
+For example:
+
+```c++
+static void BM_test(benchmark::State& state) {
+  auto resource = GetResource();
+  if (!resource.good()) {
+    state.SkipWithError("Resource is not good!");
+    // KeepRunning() loop will not be entered.
+  }
+  while (state.KeepRunning()) {
+    auto data = resource.read_data();
+    if (!resource.good()) {
+      state.SkipWithError("Failed to read data!");
+      break; // Needed to skip the rest of the iteration.
+    }
+    do_stuff(data);
+  }
+}
+
+static void BM_test_ranged_fo(benchmark::State & state) {
+  auto resource = GetResource();
+  if (!resource.good()) {
+    state.SkipWithError("Resource is not good!");
+    return; // Early return is allowed when SkipWithError() has been used.
+  }
+  for (auto _ : state) {
+    auto data = resource.read_data();
+    if (!resource.good()) {
+      state.SkipWithError("Failed to read data!");
+      break; // REQUIRED to prevent all further iterations.
+    }
+    do_stuff(data);
+  }
+}
+```
+<a name="a-faster-keep-running-loop" />
+
+## A Faster KeepRunning Loop
+
+In C++11 mode, a ranged-based for loop should be used in preference to
+the `KeepRunning` loop for running the benchmarks. For example:
+
+```c++
+static void BM_Fast(benchmark::State &state) {
+  for (auto _ : state) {
+    FastOperation();
+  }
+}
+BENCHMARK(BM_Fast);
+```
+
+The reason the ranged-for loop is faster than using `KeepRunning`, is
+because `KeepRunning` requires a memory load and store of the iteration count
+ever iteration, whereas the ranged-for variant is able to keep the iteration count
+in a register.
+
+For example, an empty inner loop of using the ranged-based for method looks like:
+
+```asm
+# Loop Init
+  mov rbx, qword ptr [r14 + 104]
+  call benchmark::State::StartKeepRunning()
+  test rbx, rbx
+  je .LoopEnd
+.LoopHeader: # =>This Inner Loop Header: Depth=1
+  add rbx, -1
+  jne .LoopHeader
+.LoopEnd:
+```
+
+Compared to an empty `KeepRunning` loop, which looks like:
+
+```asm
+.LoopHeader: # in Loop: Header=BB0_3 Depth=1
+  cmp byte ptr [rbx], 1
+  jne .LoopInit
+.LoopBody: # =>This Inner Loop Header: Depth=1
+  mov rax, qword ptr [rbx + 8]
+  lea rcx, [rax + 1]
+  mov qword ptr [rbx + 8], rcx
+  cmp rax, qword ptr [rbx + 104]
+  jb .LoopHeader
+  jmp .LoopEnd
+.LoopInit:
+  mov rdi, rbx
+  call benchmark::State::StartKeepRunning()
+  jmp .LoopBody
+.LoopEnd:
+```
+
+Unless C++03 compatibility is required, the ranged-for variant of writing
+the benchmark loop should be preferred.
+
+<a name="disabling-cpu-frequency-scaling" />
+
+## Disabling CPU Frequency Scaling
+
+If you see this error:
+
+```
+***WARNING*** CPU scaling is enabled, the benchmark real time measurements may be noisy and will incur extra overhead.
+```
+
+you might want to disable the CPU frequency scaling while running the benchmark:
+
+```bash
+sudo cpupower frequency-set --governor performance
+./mybench
+sudo cpupower frequency-set --governor powersave
+```
diff --git a/3rdparty/benchmark/include/benchmark/benchmark.h b/3rdparty/benchmark/include/benchmark/benchmark.h
new file mode 100644
index 00000000..c8ced387
--- /dev/null
+++ b/3rdparty/benchmark/include/benchmark/benchmark.h
@@ -0,0 +1,1765 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Support for registering benchmarks for functions.
+
+/* Example usage:
+// Define a function that executes the code to be measured a
+// specified number of times:
+static void BM_StringCreation(benchmark::State& state) {
+  for (auto _ : state)
+    std::string empty_string;
+}
+
+// Register the function as a benchmark
+BENCHMARK(BM_StringCreation);
+
+// Define another benchmark
+static void BM_StringCopy(benchmark::State& state) {
+  std::string x = "hello";
+  for (auto _ : state)
+    std::string copy(x);
+}
+BENCHMARK(BM_StringCopy);
+
+// Augment the main() program to invoke benchmarks if specified
+// via the --benchmark_filter command line flag.  E.g.,
+//       my_unittest --benchmark_filter=all
+//       my_unittest --benchmark_filter=BM_StringCreation
+//       my_unittest --benchmark_filter=String
+//       my_unittest --benchmark_filter='Copy|Creation'
+int main(int argc, char** argv) {
+  benchmark::Initialize(&argc, argv);
+  benchmark::RunSpecifiedBenchmarks();
+  benchmark::Shutdown();
+  return 0;
+}
+
+// Sometimes a family of microbenchmarks can be implemented with
+// just one routine that takes an extra argument to specify which
+// one of the family of benchmarks to run.  For example, the following
+// code defines a family of microbenchmarks for measuring the speed
+// of memcpy() calls of different lengths:
+
+static void BM_memcpy(benchmark::State& state) {
+  char* src = new char[state.range(0)]; char* dst = new char[state.range(0)];
+  memset(src, 'x', state.range(0));
+  for (auto _ : state)
+    memcpy(dst, src, state.range(0));
+  state.SetBytesProcessed(state.iterations() * state.range(0));
+  delete[] src; delete[] dst;
+}
+BENCHMARK(BM_memcpy)->Arg(8)->Arg(64)->Arg(512)->Arg(1<<10)->Arg(8<<10);
+
+// The preceding code is quite repetitive, and can be replaced with the
+// following short-hand.  The following invocation will pick a few
+// appropriate arguments in the specified range and will generate a
+// microbenchmark for each such argument.
+BENCHMARK(BM_memcpy)->Range(8, 8<<10);
+
+// You might have a microbenchmark that depends on two inputs.  For
+// example, the following code defines a family of microbenchmarks for
+// measuring the speed of set insertion.
+static void BM_SetInsert(benchmark::State& state) {
+  set<int> data;
+  for (auto _ : state) {
+    state.PauseTiming();
+    data = ConstructRandomSet(state.range(0));
+    state.ResumeTiming();
+    for (int j = 0; j < state.range(1); ++j)
+      data.insert(RandomNumber());
+  }
+}
+BENCHMARK(BM_SetInsert)
+   ->Args({1<<10, 128})
+   ->Args({2<<10, 128})
+   ->Args({4<<10, 128})
+   ->Args({8<<10, 128})
+   ->Args({1<<10, 512})
+   ->Args({2<<10, 512})
+   ->Args({4<<10, 512})
+   ->Args({8<<10, 512});
+
+// The preceding code is quite repetitive, and can be replaced with
+// the following short-hand.  The following macro will pick a few
+// appropriate arguments in the product of the two specified ranges
+// and will generate a microbenchmark for each such pair.
+BENCHMARK(BM_SetInsert)->Ranges({{1<<10, 8<<10}, {128, 512}});
+
+// For more complex patterns of inputs, passing a custom function
+// to Apply allows programmatic specification of an
+// arbitrary set of arguments to run the microbenchmark on.
+// The following example enumerates a dense range on
+// one parameter, and a sparse range on the second.
+static void CustomArguments(benchmark::internal::Benchmark* b) {
+  for (int i = 0; i <= 10; ++i)
+    for (int j = 32; j <= 1024*1024; j *= 8)
+      b->Args({i, j});
+}
+BENCHMARK(BM_SetInsert)->Apply(CustomArguments);
+
+// Templated microbenchmarks work the same way:
+// Produce then consume 'size' messages 'iters' times
+// Measures throughput in the absence of multiprogramming.
+template <class Q> int BM_Sequential(benchmark::State& state) {
+  Q q;
+  typename Q::value_type v;
+  for (auto _ : state) {
+    for (int i = state.range(0); i--; )
+      q.push(v);
+    for (int e = state.range(0); e--; )
+      q.Wait(&v);
+  }
+  // actually messages, not bytes:
+  state.SetBytesProcessed(state.iterations() * state.range(0));
+}
+BENCHMARK_TEMPLATE(BM_Sequential, WaitQueue<int>)->Range(1<<0, 1<<10);
+
+Use `Benchmark::MinTime(double t)` to set the minimum time used to run the
+benchmark. This option overrides the `benchmark_min_time` flag.
+
+void BM_test(benchmark::State& state) {
+ ... body ...
+}
+BENCHMARK(BM_test)->MinTime(2.0); // Run for at least 2 seconds.
+
+In a multithreaded test, it is guaranteed that none of the threads will start
+until all have reached the loop start, and all will have finished before any
+thread exits the loop body. As such, any global setup or teardown you want to
+do can be wrapped in a check against the thread index:
+
+static void BM_MultiThreaded(benchmark::State& state) {
+  if (state.thread_index() == 0) {
+    // Setup code here.
+  }
+  for (auto _ : state) {
+    // Run the test as normal.
+  }
+  if (state.thread_index() == 0) {
+    // Teardown code here.
+  }
+}
+BENCHMARK(BM_MultiThreaded)->Threads(4);
+
+
+If a benchmark runs a few milliseconds it may be hard to visually compare the
+measured times, since the output data is given in nanoseconds per default. In
+order to manually set the time unit, you can specify it manually:
+
+BENCHMARK(BM_test)->Unit(benchmark::kMillisecond);
+*/
+
+#ifndef BENCHMARK_BENCHMARK_H_
+#define BENCHMARK_BENCHMARK_H_
+
+// The _MSVC_LANG check should detect Visual Studio 2015 Update 3 and newer.
+#if __cplusplus >= 201103L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201103L)
+#define BENCHMARK_HAS_CXX11
+#endif
+
+// This _MSC_VER check should detect VS 2017 v15.3 and newer.
+#if __cplusplus >= 201703L || \
+    (defined(_MSC_VER) && _MSC_VER >= 1911 && _MSVC_LANG >= 201703L)
+#define BENCHMARK_HAS_CXX17
+#endif
+
+#include <stdint.h>
+
+#include <algorithm>
+#include <cassert>
+#include <cstddef>
+#include <iosfwd>
+#include <limits>
+#include <map>
+#include <set>
+#include <string>
+#include <utility>
+#include <vector>
+
+#if defined(BENCHMARK_HAS_CXX11)
+#include <atomic>
+#include <initializer_list>
+#include <type_traits>
+#include <utility>
+#endif
+
+#if defined(_MSC_VER)
+#include <intrin.h>  // for _ReadWriteBarrier
+#endif
+
+#ifndef BENCHMARK_HAS_CXX11
+#define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName) \
+  TypeName(const TypeName&);                         \
+  TypeName& operator=(const TypeName&)
+#else
+#define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName) \
+  TypeName(const TypeName&) = delete;                \
+  TypeName& operator=(const TypeName&) = delete
+#endif
+
+#ifdef BENCHMARK_HAS_CXX17
+#define BENCHMARK_UNUSED [[maybe_unused]]
+#elif defined(__GNUC__) || defined(__clang__)
+#define BENCHMARK_UNUSED __attribute__((unused))
+#else
+#define BENCHMARK_UNUSED
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#define BENCHMARK_ALWAYS_INLINE __attribute__((always_inline))
+#define BENCHMARK_NOEXCEPT noexcept
+#define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
+#elif defined(_MSC_VER) && !defined(__clang__)
+#define BENCHMARK_ALWAYS_INLINE __forceinline
+#if _MSC_VER >= 1900
+#define BENCHMARK_NOEXCEPT noexcept
+#define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
+#else
+#define BENCHMARK_NOEXCEPT
+#define BENCHMARK_NOEXCEPT_OP(x)
+#endif
+#define __func__ __FUNCTION__
+#else
+#define BENCHMARK_ALWAYS_INLINE
+#define BENCHMARK_NOEXCEPT
+#define BENCHMARK_NOEXCEPT_OP(x)
+#endif
+
+#define BENCHMARK_INTERNAL_TOSTRING2(x) #x
+#define BENCHMARK_INTERNAL_TOSTRING(x) BENCHMARK_INTERNAL_TOSTRING2(x)
+
+// clang-format off
+#if defined(__GNUC__) || defined(__clang__)
+#define BENCHMARK_BUILTIN_EXPECT(x, y) __builtin_expect(x, y)
+#define BENCHMARK_DEPRECATED_MSG(msg) __attribute__((deprecated(msg)))
+#define BENCHMARK_DISABLE_DEPRECATED_WARNING \
+  _Pragma("GCC diagnostic push")             \
+  _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
+#define BENCHMARK_RESTORE_DEPRECATED_WARNING _Pragma("GCC diagnostic pop")
+#else
+#define BENCHMARK_BUILTIN_EXPECT(x, y) x
+#define BENCHMARK_DEPRECATED_MSG(msg)
+#define BENCHMARK_WARNING_MSG(msg)                           \
+  __pragma(message(__FILE__ "(" BENCHMARK_INTERNAL_TOSTRING( \
+      __LINE__) ") : warning note: " msg))
+#define BENCHMARK_DISABLE_DEPRECATED_WARNING
+#define BENCHMARK_RESTORE_DEPRECATED_WARNING
+#endif
+// clang-format on
+
+#if defined(__GNUC__) && !defined(__clang__)
+#define BENCHMARK_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
+#endif
+
+#ifndef __has_builtin
+#define __has_builtin(x) 0
+#endif
+
+#if defined(__GNUC__) || __has_builtin(__builtin_unreachable)
+#define BENCHMARK_UNREACHABLE() __builtin_unreachable()
+#elif defined(_MSC_VER)
+#define BENCHMARK_UNREACHABLE() __assume(false)
+#else
+#define BENCHMARK_UNREACHABLE() ((void)0)
+#endif
+
+#ifdef BENCHMARK_HAS_CXX11
+#define BENCHMARK_OVERRIDE override
+#else
+#define BENCHMARK_OVERRIDE
+#endif
+
+namespace benchmark {
+class BenchmarkReporter;
+
+void Initialize(int* argc, char** argv);
+void Shutdown();
+
+// Report to stdout all arguments in 'argv' as unrecognized except the first.
+// Returns true there is at least on unrecognized argument (i.e. 'argc' > 1).
+bool ReportUnrecognizedArguments(int argc, char** argv);
+
+// Returns the current value of --benchmark_filter.
+std::string GetBenchmarkFilter();
+
+// Generate a list of benchmarks matching the specified --benchmark_filter flag
+// and if --benchmark_list_tests is specified return after printing the name
+// of each matching benchmark. Otherwise run each matching benchmark and
+// report the results.
+//
+// spec : Specify the benchmarks to run. If users do not specify this arg,
+//        then the value of FLAGS_benchmark_filter
+//        will be used.
+//
+// The second and third overload use the specified 'display_reporter' and
+//  'file_reporter' respectively. 'file_reporter' will write to the file
+//  specified
+//   by '--benchmark_output'. If '--benchmark_output' is not given the
+//  'file_reporter' is ignored.
+//
+// RETURNS: The number of matching benchmarks.
+size_t RunSpecifiedBenchmarks();
+size_t RunSpecifiedBenchmarks(std::string spec);
+
+size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter);
+size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
+                              std::string spec);
+
+size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
+                              BenchmarkReporter* file_reporter);
+size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
+                              BenchmarkReporter* file_reporter,
+                              std::string spec);
+
+// If a MemoryManager is registered (via RegisterMemoryManager()),
+// it can be used to collect and report allocation metrics for a run of the
+// benchmark.
+class MemoryManager {
+ public:
+  static const int64_t TombstoneValue;
+
+  struct Result {
+    Result()
+        : num_allocs(0),
+          max_bytes_used(0),
+          total_allocated_bytes(TombstoneValue),
+          net_heap_growth(TombstoneValue) {}
+
+    // The number of allocations made in total between Start and Stop.
+    int64_t num_allocs;
+
+    // The peak memory use between Start and Stop.
+    int64_t max_bytes_used;
+
+    // The total memory allocated, in bytes, between Start and Stop.
+    // Init'ed to TombstoneValue if metric not available.
+    int64_t total_allocated_bytes;
+
+    // The net changes in memory, in bytes, between Start and Stop.
+    // ie., total_allocated_bytes - total_deallocated_bytes.
+    // Init'ed to TombstoneValue if metric not available.
+    int64_t net_heap_growth;
+  };
+
+  virtual ~MemoryManager() {}
+
+  // Implement this to start recording allocation information.
+  virtual void Start() = 0;
+
+  // Implement this to stop recording and fill out the given Result structure.
+  BENCHMARK_DEPRECATED_MSG("Use Stop(Result&) instead")
+  virtual void Stop(Result* result) = 0;
+
+  // FIXME(vyng): Make this pure virtual once we've migrated current users.
+  BENCHMARK_DISABLE_DEPRECATED_WARNING
+  virtual void Stop(Result& result) { Stop(&result); }
+  BENCHMARK_RESTORE_DEPRECATED_WARNING
+};
+
+// Register a MemoryManager instance that will be used to collect and report
+// allocation measurements for benchmark runs.
+void RegisterMemoryManager(MemoryManager* memory_manager);
+
+// Add a key-value pair to output as part of the context stanza in the report.
+void AddCustomContext(const std::string& key, const std::string& value);
+
+namespace internal {
+class Benchmark;
+class BenchmarkImp;
+class BenchmarkFamilies;
+
+void UseCharPointer(char const volatile*);
+
+// Take ownership of the pointer and register the benchmark. Return the
+// registered benchmark.
+Benchmark* RegisterBenchmarkInternal(Benchmark*);
+
+// Ensure that the standard streams are properly initialized in every TU.
+int InitializeStreams();
+BENCHMARK_UNUSED static int stream_init_anchor = InitializeStreams();
+
+}  // namespace internal
+
+#if (!defined(__GNUC__) && !defined(__clang__)) || defined(__pnacl__) || \
+    defined(__EMSCRIPTEN__)
+#define BENCHMARK_HAS_NO_INLINE_ASSEMBLY
+#endif
+
+// Force the compiler to flush pending writes to global memory. Acts as an
+// effective read/write barrier
+#ifdef BENCHMARK_HAS_CXX11
+inline BENCHMARK_ALWAYS_INLINE void ClobberMemory() {
+  std::atomic_signal_fence(std::memory_order_acq_rel);
+}
+#endif
+
+// The DoNotOptimize(...) function can be used to prevent a value or
+// expression from being optimized away by the compiler. This function is
+// intended to add little to no overhead.
+// See: https://youtu.be/nXaxk27zwlk?t=2441
+#ifndef BENCHMARK_HAS_NO_INLINE_ASSEMBLY
+template <class Tp>
+inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {
+  asm volatile("" : : "r,m"(value) : "memory");
+}
+
+template <class Tp>
+inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp& value) {
+#if defined(__clang__)
+  asm volatile("" : "+r,m"(value) : : "memory");
+#else
+  asm volatile("" : "+m,r"(value) : : "memory");
+#endif
+}
+
+#ifndef BENCHMARK_HAS_CXX11
+inline BENCHMARK_ALWAYS_INLINE void ClobberMemory() {
+  asm volatile("" : : : "memory");
+}
+#endif
+#elif defined(_MSC_VER)
+template <class Tp>
+inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {
+  internal::UseCharPointer(&reinterpret_cast<char const volatile&>(value));
+  _ReadWriteBarrier();
+}
+
+#ifndef BENCHMARK_HAS_CXX11
+inline BENCHMARK_ALWAYS_INLINE void ClobberMemory() { _ReadWriteBarrier(); }
+#endif
+#else
+template <class Tp>
+inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {
+  internal::UseCharPointer(&reinterpret_cast<char const volatile&>(value));
+}
+// FIXME Add ClobberMemory() for non-gnu and non-msvc compilers, before C++11.
+#endif
+
+// This class is used for user-defined counters.
+class Counter {
+ public:
+  enum Flags {
+    kDefaults = 0,
+    // Mark the counter as a rate. It will be presented divided
+    // by the duration of the benchmark.
+    kIsRate = 1 << 0,
+    // Mark the counter as a thread-average quantity. It will be
+    // presented divided by the number of threads.
+    kAvgThreads = 1 << 1,
+    // Mark the counter as a thread-average rate. See above.
+    kAvgThreadsRate = kIsRate | kAvgThreads,
+    // Mark the counter as a constant value, valid/same for *every* iteration.
+    // When reporting, it will be *multiplied* by the iteration count.
+    kIsIterationInvariant = 1 << 2,
+    // Mark the counter as a constant rate.
+    // When reporting, it will be *multiplied* by the iteration count
+    // and then divided by the duration of the benchmark.
+    kIsIterationInvariantRate = kIsRate | kIsIterationInvariant,
+    // Mark the counter as a iteration-average quantity.
+    // It will be presented divided by the number of iterations.
+    kAvgIterations = 1 << 3,
+    // Mark the counter as a iteration-average rate. See above.
+    kAvgIterationsRate = kIsRate | kAvgIterations,
+
+    // In the end, invert the result. This is always done last!
+    kInvert = 1 << 31
+  };
+
+  enum OneK {
+    // 1'000 items per 1k
+    kIs1000 = 1000,
+    // 1'024 items per 1k
+    kIs1024 = 1024
+  };
+
+  double value;
+  Flags flags;
+  OneK oneK;
+
+  BENCHMARK_ALWAYS_INLINE
+  Counter(double v = 0., Flags f = kDefaults, OneK k = kIs1000)
+      : value(v), flags(f), oneK(k) {}
+
+  BENCHMARK_ALWAYS_INLINE operator double const &() const { return value; }
+  BENCHMARK_ALWAYS_INLINE operator double&() { return value; }
+};
+
+// A helper for user code to create unforeseen combinations of Flags, without
+// having to do this cast manually each time, or providing this operator.
+Counter::Flags inline operator|(const Counter::Flags& LHS,
+                                const Counter::Flags& RHS) {
+  return static_cast<Counter::Flags>(static_cast<int>(LHS) |
+                                     static_cast<int>(RHS));
+}
+
+// This is the container for the user-defined counters.
+typedef std::map<std::string, Counter> UserCounters;
+
+// TimeUnit is passed to a benchmark in order to specify the order of magnitude
+// for the measured time.
+enum TimeUnit { kNanosecond, kMicrosecond, kMillisecond, kSecond };
+
+// BigO is passed to a benchmark in order to specify the asymptotic
+// computational
+// complexity for the benchmark. In case oAuto is selected, complexity will be
+// calculated automatically to the best fit.
+enum BigO { oNone, o1, oN, oNSquared, oNCubed, oLogN, oNLogN, oAuto, oLambda };
+
+typedef uint64_t IterationCount;
+
+enum StatisticUnit { kTime, kPercentage };
+
+// BigOFunc is passed to a benchmark in order to specify the asymptotic
+// computational complexity for the benchmark.
+typedef double(BigOFunc)(IterationCount);
+
+// StatisticsFunc is passed to a benchmark in order to compute some descriptive
+// statistics over all the measurements of some type
+typedef double(StatisticsFunc)(const std::vector<double>&);
+
+namespace internal {
+struct Statistics {
+  std::string name_;
+  StatisticsFunc* compute_;
+  StatisticUnit unit_;
+
+  Statistics(const std::string& name, StatisticsFunc* compute,
+             StatisticUnit unit = kTime)
+      : name_(name), compute_(compute), unit_(unit) {}
+};
+
+class BenchmarkInstance;
+class ThreadTimer;
+class ThreadManager;
+class PerfCountersMeasurement;
+
+enum AggregationReportMode
+#if defined(BENCHMARK_HAS_CXX11)
+    : unsigned
+#else
+#endif
+{
+  // The mode has not been manually specified
+  ARM_Unspecified = 0,
+  // The mode is user-specified.
+  // This may or may not be set when the following bit-flags are set.
+  ARM_Default = 1U << 0U,
+  // File reporter should only output aggregates.
+  ARM_FileReportAggregatesOnly = 1U << 1U,
+  // Display reporter should only output aggregates
+  ARM_DisplayReportAggregatesOnly = 1U << 2U,
+  // Both reporters should only display aggregates.
+  ARM_ReportAggregatesOnly =
+      ARM_FileReportAggregatesOnly | ARM_DisplayReportAggregatesOnly
+};
+
+}  // namespace internal
+
+// State is passed to a running Benchmark and contains state for the
+// benchmark to use.
+class State {
+ public:
+  struct StateIterator;
+  friend struct StateIterator;
+
+  // Returns iterators used to run each iteration of a benchmark using a
+  // C++11 ranged-based for loop. These functions should not be called directly.
+  //
+  // REQUIRES: The benchmark has not started running yet. Neither begin nor end
+  // have been called previously.
+  //
+  // NOTE: KeepRunning may not be used after calling either of these functions.
+  BENCHMARK_ALWAYS_INLINE StateIterator begin();
+  BENCHMARK_ALWAYS_INLINE StateIterator end();
+
+  // Returns true if the benchmark should continue through another iteration.
+  // NOTE: A benchmark may not return from the test until KeepRunning() has
+  // returned false.
+  bool KeepRunning();
+
+  // Returns true iff the benchmark should run n more iterations.
+  // REQUIRES: 'n' > 0.
+  // NOTE: A benchmark must not return from the test until KeepRunningBatch()
+  // has returned false.
+  // NOTE: KeepRunningBatch() may overshoot by up to 'n' iterations.
+  //
+  // Intended usage:
+  //   while (state.KeepRunningBatch(1000)) {
+  //     // process 1000 elements
+  //   }
+  bool KeepRunningBatch(IterationCount n);
+
+  // REQUIRES: timer is running and 'SkipWithError(...)' has not been called
+  //           by the current thread.
+  // Stop the benchmark timer.  If not called, the timer will be
+  // automatically stopped after the last iteration of the benchmark loop.
+  //
+  // For threaded benchmarks the PauseTiming() function only pauses the timing
+  // for the current thread.
+  //
+  // NOTE: The "real time" measurement is per-thread. If different threads
+  // report different measurements the largest one is reported.
+  //
+  // NOTE: PauseTiming()/ResumeTiming() are relatively
+  // heavyweight, and so their use should generally be avoided
+  // within each benchmark iteration, if possible.
+  void PauseTiming();
+
+  // REQUIRES: timer is not running and 'SkipWithError(...)' has not been called
+  //           by the current thread.
+  // Start the benchmark timer.  The timer is NOT running on entrance to the
+  // benchmark function. It begins running after control flow enters the
+  // benchmark loop.
+  //
+  // NOTE: PauseTiming()/ResumeTiming() are relatively
+  // heavyweight, and so their use should generally be avoided
+  // within each benchmark iteration, if possible.
+  void ResumeTiming();
+
+  // REQUIRES: 'SkipWithError(...)' has not been called previously by the
+  //            current thread.
+  // Report the benchmark as resulting in an error with the specified 'msg'.
+  // After this call the user may explicitly 'return' from the benchmark.
+  //
+  // If the ranged-for style of benchmark loop is used, the user must explicitly
+  // break from the loop, otherwise all future iterations will be run.
+  // If the 'KeepRunning()' loop is used the current thread will automatically
+  // exit the loop at the end of the current iteration.
+  //
+  // For threaded benchmarks only the current thread stops executing and future
+  // calls to `KeepRunning()` will block until all threads have completed
+  // the `KeepRunning()` loop. If multiple threads report an error only the
+  // first error message is used.
+  //
+  // NOTE: Calling 'SkipWithError(...)' does not cause the benchmark to exit
+  // the current scope immediately. If the function is called from within
+  // the 'KeepRunning()' loop the current iteration will finish. It is the users
+  // responsibility to exit the scope as needed.
+  void SkipWithError(const char* msg);
+
+  // Returns true if an error has been reported with 'SkipWithError(...)'.
+  bool error_occurred() const { return error_occurred_; }
+
+  // REQUIRES: called exactly once per iteration of the benchmarking loop.
+  // Set the manually measured time for this benchmark iteration, which
+  // is used instead of automatically measured time if UseManualTime() was
+  // specified.
+  //
+  // For threaded benchmarks the final value will be set to the largest
+  // reported values.
+  void SetIterationTime(double seconds);
+
+  // Set the number of bytes processed by the current benchmark
+  // execution.  This routine is typically called once at the end of a
+  // throughput oriented benchmark.
+  //
+  // REQUIRES: a benchmark has exited its benchmarking loop.
+  BENCHMARK_ALWAYS_INLINE
+  void SetBytesProcessed(int64_t bytes) {
+    counters["bytes_per_second"] =
+        Counter(static_cast<double>(bytes), Counter::kIsRate, Counter::kIs1024);
+  }
+
+  BENCHMARK_ALWAYS_INLINE
+  int64_t bytes_processed() const {
+    if (counters.find("bytes_per_second") != counters.end())
+      return static_cast<int64_t>(counters.at("bytes_per_second"));
+    return 0;
+  }
+
+  // If this routine is called with complexity_n > 0 and complexity report is
+  // requested for the
+  // family benchmark, then current benchmark will be part of the computation
+  // and complexity_n will
+  // represent the length of N.
+  BENCHMARK_ALWAYS_INLINE
+  void SetComplexityN(int64_t complexity_n) { complexity_n_ = complexity_n; }
+
+  BENCHMARK_ALWAYS_INLINE
+  int64_t complexity_length_n() const { return complexity_n_; }
+
+  // If this routine is called with items > 0, then an items/s
+  // label is printed on the benchmark report line for the currently
+  // executing benchmark. It is typically called at the end of a processing
+  // benchmark where a processing items/second output is desired.
+  //
+  // REQUIRES: a benchmark has exited its benchmarking loop.
+  BENCHMARK_ALWAYS_INLINE
+  void SetItemsProcessed(int64_t items) {
+    counters["items_per_second"] =
+        Counter(static_cast<double>(items), benchmark::Counter::kIsRate);
+  }
+
+  BENCHMARK_ALWAYS_INLINE
+  int64_t items_processed() const {
+    if (counters.find("items_per_second") != counters.end())
+      return static_cast<int64_t>(counters.at("items_per_second"));
+    return 0;
+  }
+
+  // If this routine is called, the specified label is printed at the
+  // end of the benchmark report line for the currently executing
+  // benchmark.  Example:
+  //  static void BM_Compress(benchmark::State& state) {
+  //    ...
+  //    double compress = input_size / output_size;
+  //    state.SetLabel(StrFormat("compress:%.1f%%", 100.0*compression));
+  //  }
+  // Produces output that looks like:
+  //  BM_Compress   50         50   14115038  compress:27.3%
+  //
+  // REQUIRES: a benchmark has exited its benchmarking loop.
+  void SetLabel(const char* label);
+
+  void BENCHMARK_ALWAYS_INLINE SetLabel(const std::string& str) {
+    this->SetLabel(str.c_str());
+  }
+
+  // Range arguments for this run. CHECKs if the argument has been set.
+  BENCHMARK_ALWAYS_INLINE
+  int64_t range(std::size_t pos = 0) const {
+    assert(range_.size() > pos);
+    return range_[pos];
+  }
+
+  BENCHMARK_DEPRECATED_MSG("use 'range(0)' instead")
+  int64_t range_x() const { return range(0); }
+
+  BENCHMARK_DEPRECATED_MSG("use 'range(1)' instead")
+  int64_t range_y() const { return range(1); }
+
+  // Number of threads concurrently executing the benchmark.
+  BENCHMARK_ALWAYS_INLINE
+  int threads() const { return threads_; }
+
+  // Index of the executing thread. Values from [0, threads).
+  BENCHMARK_ALWAYS_INLINE
+  int thread_index() const { return thread_index_; }
+
+  BENCHMARK_ALWAYS_INLINE
+  IterationCount iterations() const {
+    if (BENCHMARK_BUILTIN_EXPECT(!started_, false)) {
+      return 0;
+    }
+    return max_iterations - total_iterations_ + batch_leftover_;
+  }
+
+ private:
+  // items we expect on the first cache line (ie 64 bytes of the struct)
+  // When total_iterations_ is 0, KeepRunning() and friends will return false.
+  // May be larger than max_iterations.
+  IterationCount total_iterations_;
+
+  // When using KeepRunningBatch(), batch_leftover_ holds the number of
+  // iterations beyond max_iters that were run. Used to track
+  // completed_iterations_ accurately.
+  IterationCount batch_leftover_;
+
+ public:
+  const IterationCount max_iterations;
+
+ private:
+  bool started_;
+  bool finished_;
+  bool error_occurred_;
+
+  // items we don't need on the first cache line
+  std::vector<int64_t> range_;
+
+  int64_t complexity_n_;
+
+ public:
+  // Container for user-defined counters.
+  UserCounters counters;
+
+ private:
+  State(IterationCount max_iters, const std::vector<int64_t>& ranges,
+        int thread_i, int n_threads, internal::ThreadTimer* timer,
+        internal::ThreadManager* manager,
+        internal::PerfCountersMeasurement* perf_counters_measurement);
+
+  void StartKeepRunning();
+  // Implementation of KeepRunning() and KeepRunningBatch().
+  // is_batch must be true unless n is 1.
+  bool KeepRunningInternal(IterationCount n, bool is_batch);
+  void FinishKeepRunning();
+
+  const int thread_index_;
+  const int threads_;
+
+  internal::ThreadTimer* const timer_;
+  internal::ThreadManager* const manager_;
+  internal::PerfCountersMeasurement* const perf_counters_measurement_;
+
+  friend class internal::BenchmarkInstance;
+};
+
+inline BENCHMARK_ALWAYS_INLINE bool State::KeepRunning() {
+  return KeepRunningInternal(1, /*is_batch=*/false);
+}
+
+inline BENCHMARK_ALWAYS_INLINE bool State::KeepRunningBatch(IterationCount n) {
+  return KeepRunningInternal(n, /*is_batch=*/true);
+}
+
+inline BENCHMARK_ALWAYS_INLINE bool State::KeepRunningInternal(IterationCount n,
+                                                               bool is_batch) {
+  // total_iterations_ is set to 0 by the constructor, and always set to a
+  // nonzero value by StartKepRunning().
+  assert(n > 0);
+  // n must be 1 unless is_batch is true.
+  assert(is_batch || n == 1);
+  if (BENCHMARK_BUILTIN_EXPECT(total_iterations_ >= n, true)) {
+    total_iterations_ -= n;
+    return true;
+  }
+  if (!started_) {
+    StartKeepRunning();
+    if (!error_occurred_ && total_iterations_ >= n) {
+      total_iterations_ -= n;
+      return true;
+    }
+  }
+  // For non-batch runs, total_iterations_ must be 0 by now.
+  if (is_batch && total_iterations_ != 0) {
+    batch_leftover_ = n - total_iterations_;
+    total_iterations_ = 0;
+    return true;
+  }
+  FinishKeepRunning();
+  return false;
+}
+
+struct State::StateIterator {
+  struct BENCHMARK_UNUSED Value {};
+  typedef std::forward_iterator_tag iterator_category;
+  typedef Value value_type;
+  typedef Value reference;
+  typedef Value pointer;
+  typedef std::ptrdiff_t difference_type;
+
+ private:
+  friend class State;
+  BENCHMARK_ALWAYS_INLINE
+  StateIterator() : cached_(0), parent_() {}
+
+  BENCHMARK_ALWAYS_INLINE
+  explicit StateIterator(State* st)
+      : cached_(st->error_occurred_ ? 0 : st->max_iterations), parent_(st) {}
+
+ public:
+  BENCHMARK_ALWAYS_INLINE
+  Value operator*() const { return Value(); }
+
+  BENCHMARK_ALWAYS_INLINE
+  StateIterator& operator++() {
+    assert(cached_ > 0);
+    --cached_;
+    return *this;
+  }
+
+  BENCHMARK_ALWAYS_INLINE
+  bool operator!=(StateIterator const&) const {
+    if (BENCHMARK_BUILTIN_EXPECT(cached_ != 0, true)) return true;
+    parent_->FinishKeepRunning();
+    return false;
+  }
+
+ private:
+  IterationCount cached_;
+  State* const parent_;
+};
+
+inline BENCHMARK_ALWAYS_INLINE State::StateIterator State::begin() {
+  return StateIterator(this);
+}
+inline BENCHMARK_ALWAYS_INLINE State::StateIterator State::end() {
+  StartKeepRunning();
+  return StateIterator();
+}
+
+namespace internal {
+
+typedef void(Function)(State&);
+
+// ------------------------------------------------------
+// Benchmark registration object.  The BENCHMARK() macro expands
+// into an internal::Benchmark* object.  Various methods can
+// be called on this object to change the properties of the benchmark.
+// Each method returns "this" so that multiple method calls can
+// chained into one expression.
+class Benchmark {
+ public:
+  virtual ~Benchmark();
+
+  // Note: the following methods all return "this" so that multiple
+  // method calls can be chained together in one expression.
+
+  // Specify the name of the benchmark
+  Benchmark* Name(const std::string& name);
+
+  // Run this benchmark once with "x" as the extra argument passed
+  // to the function.
+  // REQUIRES: The function passed to the constructor must accept an arg1.
+  Benchmark* Arg(int64_t x);
+
+  // Run this benchmark with the given time unit for the generated output report
+  Benchmark* Unit(TimeUnit unit);
+
+  // Run this benchmark once for a number of values picked from the
+  // range [start..limit].  (start and limit are always picked.)
+  // REQUIRES: The function passed to the constructor must accept an arg1.
+  Benchmark* Range(int64_t start, int64_t limit);
+
+  // Run this benchmark once for all values in the range [start..limit] with
+  // specific step
+  // REQUIRES: The function passed to the constructor must accept an arg1.
+  Benchmark* DenseRange(int64_t start, int64_t limit, int step = 1);
+
+  // Run this benchmark once with "args" as the extra arguments passed
+  // to the function.
+  // REQUIRES: The function passed to the constructor must accept arg1, arg2 ...
+  Benchmark* Args(const std::vector<int64_t>& args);
+
+  // Equivalent to Args({x, y})
+  // NOTE: This is a legacy C++03 interface provided for compatibility only.
+  //   New code should use 'Args'.
+  Benchmark* ArgPair(int64_t x, int64_t y) {
+    std::vector<int64_t> args;
+    args.push_back(x);
+    args.push_back(y);
+    return Args(args);
+  }
+
+  // Run this benchmark once for a number of values picked from the
+  // ranges [start..limit].  (starts and limits are always picked.)
+  // REQUIRES: The function passed to the constructor must accept arg1, arg2 ...
+  Benchmark* Ranges(const std::vector<std::pair<int64_t, int64_t> >& ranges);
+
+  // Run this benchmark once for each combination of values in the (cartesian)
+  // product of the supplied argument lists.
+  // REQUIRES: The function passed to the constructor must accept arg1, arg2 ...
+  Benchmark* ArgsProduct(const std::vector<std::vector<int64_t> >& arglists);
+
+  // Equivalent to ArgNames({name})
+  Benchmark* ArgName(const std::string& name);
+
+  // Set the argument names to display in the benchmark name. If not called,
+  // only argument values will be shown.
+  Benchmark* ArgNames(const std::vector<std::string>& names);
+
+  // Equivalent to Ranges({{lo1, hi1}, {lo2, hi2}}).
+  // NOTE: This is a legacy C++03 interface provided for compatibility only.
+  //   New code should use 'Ranges'.
+  Benchmark* RangePair(int64_t lo1, int64_t hi1, int64_t lo2, int64_t hi2) {
+    std::vector<std::pair<int64_t, int64_t> > ranges;
+    ranges.push_back(std::make_pair(lo1, hi1));
+    ranges.push_back(std::make_pair(lo2, hi2));
+    return Ranges(ranges);
+  }
+
+  // Have "setup" and/or "teardown" invoked once for every benchmark run.
+  // If the benchmark is multi-threaded (will run in k threads concurrently),
+  // the setup callback will be be invoked exactly once (not k times) before
+  // each run with k threads. Time allowing (e.g. for a short benchmark), there
+  // may be multiple such runs per benchmark, each run with its own
+  // "setup"/"teardown".
+  //
+  // If the benchmark uses different size groups of threads (e.g. via
+  // ThreadRange), the above will be true for each size group.
+  //
+  // The callback will be passed a State object, which includes the number
+  // of threads, thread-index, benchmark arguments, etc.
+  //
+  // The callback must not be NULL or self-deleting.
+  Benchmark* Setup(void (*setup)(const benchmark::State&));
+  Benchmark* Teardown(void (*teardown)(const benchmark::State&));
+
+  // Pass this benchmark object to *func, which can customize
+  // the benchmark by calling various methods like Arg, Args,
+  // Threads, etc.
+  Benchmark* Apply(void (*func)(Benchmark* benchmark));
+
+  // Set the range multiplier for non-dense range. If not called, the range
+  // multiplier kRangeMultiplier will be used.
+  Benchmark* RangeMultiplier(int multiplier);
+
+  // Set the minimum amount of time to use when running this benchmark. This
+  // option overrides the `benchmark_min_time` flag.
+  // REQUIRES: `t > 0` and `Iterations` has not been called on this benchmark.
+  Benchmark* MinTime(double t);
+
+  // Specify the amount of iterations that should be run by this benchmark.
+  // REQUIRES: 'n > 0' and `MinTime` has not been called on this benchmark.
+  //
+  // NOTE: This function should only be used when *exact* iteration control is
+  //   needed and never to control or limit how long a benchmark runs, where
+  // `--benchmark_min_time=N` or `MinTime(...)` should be used instead.
+  Benchmark* Iterations(IterationCount n);
+
+  // Specify the amount of times to repeat this benchmark. This option overrides
+  // the `benchmark_repetitions` flag.
+  // REQUIRES: `n > 0`
+  Benchmark* Repetitions(int n);
+
+  // Specify if each repetition of the benchmark should be reported separately
+  // or if only the final statistics should be reported. If the benchmark
+  // is not repeated then the single result is always reported.
+  // Applies to *ALL* reporters (display and file).
+  Benchmark* ReportAggregatesOnly(bool value = true);
+
+  // Same as ReportAggregatesOnly(), but applies to display reporter only.
+  Benchmark* DisplayAggregatesOnly(bool value = true);
+
+  // By default, the CPU time is measured only for the main thread, which may
+  // be unrepresentative if the benchmark uses threads internally. If called,
+  // the total CPU time spent by all the threads will be measured instead.
+  // By default, the only the main thread CPU time will be measured.
+  Benchmark* MeasureProcessCPUTime();
+
+  // If a particular benchmark should use the Wall clock instead of the CPU time
+  // (be it either the CPU time of the main thread only (default), or the
+  // total CPU usage of the benchmark), call this method. If called, the elapsed
+  // (wall) time will be used to control how many iterations are run, and in the
+  // printing of items/second or MB/seconds values.
+  // If not called, the CPU time used by the benchmark will be used.
+  Benchmark* UseRealTime();
+
+  // If a benchmark must measure time manually (e.g. if GPU execution time is
+  // being
+  // measured), call this method. If called, each benchmark iteration should
+  // call
+  // SetIterationTime(seconds) to report the measured time, which will be used
+  // to control how many iterations are run, and in the printing of items/second
+  // or MB/second values.
+  Benchmark* UseManualTime();
+
+  // Set the asymptotic computational complexity for the benchmark. If called
+  // the asymptotic computational complexity will be shown on the output.
+  Benchmark* Complexity(BigO complexity = benchmark::oAuto);
+
+  // Set the asymptotic computational complexity for the benchmark. If called
+  // the asymptotic computational complexity will be shown on the output.
+  Benchmark* Complexity(BigOFunc* complexity);
+
+  // Add this statistics to be computed over all the values of benchmark run
+  Benchmark* ComputeStatistics(const std::string& name,
+                               StatisticsFunc* statistics,
+                               StatisticUnit unit = kTime);
+
+  // Support for running multiple copies of the same benchmark concurrently
+  // in multiple threads.  This may be useful when measuring the scaling
+  // of some piece of code.
+
+  // Run one instance of this benchmark concurrently in t threads.
+  Benchmark* Threads(int t);
+
+  // Pick a set of values T from [min_threads,max_threads].
+  // min_threads and max_threads are always included in T.  Run this
+  // benchmark once for each value in T.  The benchmark run for a
+  // particular value t consists of t threads running the benchmark
+  // function concurrently.  For example, consider:
+  //    BENCHMARK(Foo)->ThreadRange(1,16);
+  // This will run the following benchmarks:
+  //    Foo in 1 thread
+  //    Foo in 2 threads
+  //    Foo in 4 threads
+  //    Foo in 8 threads
+  //    Foo in 16 threads
+  Benchmark* ThreadRange(int min_threads, int max_threads);
+
+  // For each value n in the range, run this benchmark once using n threads.
+  // min_threads and max_threads are always included in the range.
+  // stride specifies the increment. E.g. DenseThreadRange(1, 8, 3) starts
+  // a benchmark with 1, 4, 7 and 8 threads.
+  Benchmark* DenseThreadRange(int min_threads, int max_threads, int stride = 1);
+
+  // Equivalent to ThreadRange(NumCPUs(), NumCPUs())
+  Benchmark* ThreadPerCpu();
+
+  virtual void Run(State& state) = 0;
+
+ protected:
+  explicit Benchmark(const char* name);
+  Benchmark(Benchmark const&);
+  void SetName(const char* name);
+
+  int ArgsCnt() const;
+
+ private:
+  friend class BenchmarkFamilies;
+  friend class BenchmarkInstance;
+
+  std::string name_;
+  AggregationReportMode aggregation_report_mode_;
+  std::vector<std::string> arg_names_;       // Args for all benchmark runs
+  std::vector<std::vector<int64_t> > args_;  // Args for all benchmark runs
+  TimeUnit time_unit_;
+  int range_multiplier_;
+  double min_time_;
+  IterationCount iterations_;
+  int repetitions_;
+  bool measure_process_cpu_time_;
+  bool use_real_time_;
+  bool use_manual_time_;
+  BigO complexity_;
+  BigOFunc* complexity_lambda_;
+  std::vector<Statistics> statistics_;
+  std::vector<int> thread_counts_;
+
+  typedef void (*callback_function)(const benchmark::State&);
+  callback_function setup_;
+  callback_function teardown_;
+
+  Benchmark& operator=(Benchmark const&);
+};
+
+}  // namespace internal
+
+// Create and register a benchmark with the specified 'name' that invokes
+// the specified functor 'fn'.
+//
+// RETURNS: A pointer to the registered benchmark.
+internal::Benchmark* RegisterBenchmark(const char* name,
+                                       internal::Function* fn);
+
+#if defined(BENCHMARK_HAS_CXX11)
+template <class Lambda>
+internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn);
+#endif
+
+// Remove all registered benchmarks. All pointers to previously registered
+// benchmarks are invalidated.
+void ClearRegisteredBenchmarks();
+
+namespace internal {
+// The class used to hold all Benchmarks created from static function.
+// (ie those created using the BENCHMARK(...) macros.
+class FunctionBenchmark : public Benchmark {
+ public:
+  FunctionBenchmark(const char* name, Function* func)
+      : Benchmark(name), func_(func) {}
+
+  virtual void Run(State& st) BENCHMARK_OVERRIDE;
+
+ private:
+  Function* func_;
+};
+
+#ifdef BENCHMARK_HAS_CXX11
+template <class Lambda>
+class LambdaBenchmark : public Benchmark {
+ public:
+  virtual void Run(State& st) BENCHMARK_OVERRIDE { lambda_(st); }
+
+ private:
+  template <class OLambda>
+  LambdaBenchmark(const char* name, OLambda&& lam)
+      : Benchmark(name), lambda_(std::forward<OLambda>(lam)) {}
+
+  LambdaBenchmark(LambdaBenchmark const&) = delete;
+
+  template <class Lam>  // NOLINTNEXTLINE(readability-redundant-declaration)
+  friend Benchmark* ::benchmark::RegisterBenchmark(const char*, Lam&&);
+
+  Lambda lambda_;
+};
+#endif
+
+}  // namespace internal
+
+inline internal::Benchmark* RegisterBenchmark(const char* name,
+                                              internal::Function* fn) {
+  return internal::RegisterBenchmarkInternal(
+      ::new internal::FunctionBenchmark(name, fn));
+}
+
+#ifdef BENCHMARK_HAS_CXX11
+template <class Lambda>
+internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn) {
+  using BenchType =
+      internal::LambdaBenchmark<typename std::decay<Lambda>::type>;
+  return internal::RegisterBenchmarkInternal(
+      ::new BenchType(name, std::forward<Lambda>(fn)));
+}
+#endif
+
+#if defined(BENCHMARK_HAS_CXX11) && \
+    (!defined(BENCHMARK_GCC_VERSION) || BENCHMARK_GCC_VERSION >= 409)
+template <class Lambda, class... Args>
+internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn,
+                                       Args&&... args) {
+  return benchmark::RegisterBenchmark(
+      name, [=](benchmark::State& st) { fn(st, args...); });
+}
+#else
+#define BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
+#endif
+
+// The base class for all fixture tests.
+class Fixture : public internal::Benchmark {
+ public:
+  Fixture() : internal::Benchmark("") {}
+
+  virtual void Run(State& st) BENCHMARK_OVERRIDE {
+    this->SetUp(st);
+    this->BenchmarkCase(st);
+    this->TearDown(st);
+  }
+
+  // These will be deprecated ...
+  virtual void SetUp(const State&) {}
+  virtual void TearDown(const State&) {}
+  // ... In favor of these.
+  virtual void SetUp(State& st) { SetUp(const_cast<const State&>(st)); }
+  virtual void TearDown(State& st) { TearDown(const_cast<const State&>(st)); }
+
+ protected:
+  virtual void BenchmarkCase(State&) = 0;
+};
+
+}  // namespace benchmark
+
+// ------------------------------------------------------
+// Macro to register benchmarks
+
+// Check that __COUNTER__ is defined and that __COUNTER__ increases by 1
+// every time it is expanded. X + 1 == X + 0 is used in case X is defined to be
+// empty. If X is empty the expression becomes (+1 == +0).
+#if defined(__COUNTER__) && (__COUNTER__ + 1 == __COUNTER__ + 0)
+#define BENCHMARK_PRIVATE_UNIQUE_ID __COUNTER__
+#else
+#define BENCHMARK_PRIVATE_UNIQUE_ID __LINE__
+#endif
+
+// Helpers for generating unique variable names
+#ifdef BENCHMARK_HAS_CXX11
+#define BENCHMARK_PRIVATE_NAME(...)                                      \
+  BENCHMARK_PRIVATE_CONCAT(benchmark_uniq_, BENCHMARK_PRIVATE_UNIQUE_ID, \
+                           __VA_ARGS__)
+#else
+#define BENCHMARK_PRIVATE_NAME(n) \
+  BENCHMARK_PRIVATE_CONCAT(benchmark_uniq_, BENCHMARK_PRIVATE_UNIQUE_ID, n)
+#endif  // BENCHMARK_HAS_CXX11
+
+#define BENCHMARK_PRIVATE_CONCAT(a, b, c) BENCHMARK_PRIVATE_CONCAT2(a, b, c)
+#define BENCHMARK_PRIVATE_CONCAT2(a, b, c) a##b##c
+// Helper for concatenation with macro name expansion
+#define BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method) \
+  BaseClass##_##Method##_Benchmark
+
+#define BENCHMARK_PRIVATE_DECLARE(n)                                 \
+  static ::benchmark::internal::Benchmark* BENCHMARK_PRIVATE_NAME(n) \
+      BENCHMARK_UNUSED
+
+#ifdef BENCHMARK_HAS_CXX11
+#define BENCHMARK(...)                                               \
+  BENCHMARK_PRIVATE_DECLARE(_benchmark_) =                           \
+      (::benchmark::internal::RegisterBenchmarkInternal(             \
+          new ::benchmark::internal::FunctionBenchmark(#__VA_ARGS__, \
+                                                       &__VA_ARGS__)))
+#else
+#define BENCHMARK(n)                                     \
+  BENCHMARK_PRIVATE_DECLARE(n) =                         \
+      (::benchmark::internal::RegisterBenchmarkInternal( \
+          new ::benchmark::internal::FunctionBenchmark(#n, n)))
+#endif  // BENCHMARK_HAS_CXX11
+
+// Old-style macros
+#define BENCHMARK_WITH_ARG(n, a) BENCHMARK(n)->Arg((a))
+#define BENCHMARK_WITH_ARG2(n, a1, a2) BENCHMARK(n)->Args({(a1), (a2)})
+#define BENCHMARK_WITH_UNIT(n, t) BENCHMARK(n)->Unit((t))
+#define BENCHMARK_RANGE(n, lo, hi) BENCHMARK(n)->Range((lo), (hi))
+#define BENCHMARK_RANGE2(n, l1, h1, l2, h2) \
+  BENCHMARK(n)->RangePair({{(l1), (h1)}, {(l2), (h2)}})
+
+#ifdef BENCHMARK_HAS_CXX11
+
+// Register a benchmark which invokes the function specified by `func`
+// with the additional arguments specified by `...`.
+//
+// For example:
+//
+// template <class ...ExtraArgs>`
+// void BM_takes_args(benchmark::State& state, ExtraArgs&&... extra_args) {
+//  [...]
+//}
+// /* Registers a benchmark named "BM_takes_args/int_string_test` */
+// BENCHMARK_CAPTURE(BM_takes_args, int_string_test, 42, std::string("abc"));
+#define BENCHMARK_CAPTURE(func, test_case_name, ...)     \
+  BENCHMARK_PRIVATE_DECLARE(func) =                      \
+      (::benchmark::internal::RegisterBenchmarkInternal( \
+          new ::benchmark::internal::FunctionBenchmark(  \
+              #func "/" #test_case_name,                 \
+              [](::benchmark::State& st) { func(st, __VA_ARGS__); })))
+
+#endif  // BENCHMARK_HAS_CXX11
+
+// This will register a benchmark for a templatized function.  For example:
+//
+// template<int arg>
+// void BM_Foo(int iters);
+//
+// BENCHMARK_TEMPLATE(BM_Foo, 1);
+//
+// will register BM_Foo<1> as a benchmark.
+#define BENCHMARK_TEMPLATE1(n, a)                        \
+  BENCHMARK_PRIVATE_DECLARE(n) =                         \
+      (::benchmark::internal::RegisterBenchmarkInternal( \
+          new ::benchmark::internal::FunctionBenchmark(#n "<" #a ">", n<a>)))
+
+#define BENCHMARK_TEMPLATE2(n, a, b)                                         \
+  BENCHMARK_PRIVATE_DECLARE(n) =                                             \
+      (::benchmark::internal::RegisterBenchmarkInternal(                     \
+          new ::benchmark::internal::FunctionBenchmark(#n "<" #a "," #b ">", \
+                                                       n<a, b>)))
+
+#ifdef BENCHMARK_HAS_CXX11
+#define BENCHMARK_TEMPLATE(n, ...)                       \
+  BENCHMARK_PRIVATE_DECLARE(n) =                         \
+      (::benchmark::internal::RegisterBenchmarkInternal( \
+          new ::benchmark::internal::FunctionBenchmark(  \
+              #n "<" #__VA_ARGS__ ">", n<__VA_ARGS__>)))
+#else
+#define BENCHMARK_TEMPLATE(n, a) BENCHMARK_TEMPLATE1(n, a)
+#endif
+
+#define BENCHMARK_PRIVATE_DECLARE_F(BaseClass, Method)                  \
+  class BaseClass##_##Method##_Benchmark : public BaseClass {           \
+   public:                                                              \
+    BaseClass##_##Method##_Benchmark() {                                \
+      this->SetName(#BaseClass "/" #Method);                            \
+    }                                                                   \
+                                                                        \
+   protected:                                                           \
+    virtual void BenchmarkCase(::benchmark::State&) BENCHMARK_OVERRIDE; \
+  };
+
+#define BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(BaseClass, Method, a)     \
+  class BaseClass##_##Method##_Benchmark : public BaseClass<a> {        \
+   public:                                                              \
+    BaseClass##_##Method##_Benchmark() {                                \
+      this->SetName(#BaseClass "<" #a ">/" #Method);                    \
+    }                                                                   \
+                                                                        \
+   protected:                                                           \
+    virtual void BenchmarkCase(::benchmark::State&) BENCHMARK_OVERRIDE; \
+  };
+
+#define BENCHMARK_TEMPLATE2_PRIVATE_DECLARE_F(BaseClass, Method, a, b)  \
+  class BaseClass##_##Method##_Benchmark : public BaseClass<a, b> {     \
+   public:                                                              \
+    BaseClass##_##Method##_Benchmark() {                                \
+      this->SetName(#BaseClass "<" #a "," #b ">/" #Method);             \
+    }                                                                   \
+                                                                        \
+   protected:                                                           \
+    virtual void BenchmarkCase(::benchmark::State&) BENCHMARK_OVERRIDE; \
+  };
+
+#ifdef BENCHMARK_HAS_CXX11
+#define BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(BaseClass, Method, ...)       \
+  class BaseClass##_##Method##_Benchmark : public BaseClass<__VA_ARGS__> { \
+   public:                                                                 \
+    BaseClass##_##Method##_Benchmark() {                                   \
+      this->SetName(#BaseClass "<" #__VA_ARGS__ ">/" #Method);             \
+    }                                                                      \
+                                                                           \
+   protected:                                                              \
+    virtual void BenchmarkCase(::benchmark::State&) BENCHMARK_OVERRIDE;    \
+  };
+#else
+#define BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(n, a) \
+  BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(n, a)
+#endif
+
+#define BENCHMARK_DEFINE_F(BaseClass, Method)    \
+  BENCHMARK_PRIVATE_DECLARE_F(BaseClass, Method) \
+  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
+
+#define BENCHMARK_TEMPLATE1_DEFINE_F(BaseClass, Method, a)    \
+  BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(BaseClass, Method, a) \
+  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
+
+#define BENCHMARK_TEMPLATE2_DEFINE_F(BaseClass, Method, a, b)    \
+  BENCHMARK_TEMPLATE2_PRIVATE_DECLARE_F(BaseClass, Method, a, b) \
+  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
+
+#ifdef BENCHMARK_HAS_CXX11
+#define BENCHMARK_TEMPLATE_DEFINE_F(BaseClass, Method, ...)            \
+  BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(BaseClass, Method, __VA_ARGS__) \
+  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
+#else
+#define BENCHMARK_TEMPLATE_DEFINE_F(BaseClass, Method, a) \
+  BENCHMARK_TEMPLATE1_DEFINE_F(BaseClass, Method, a)
+#endif
+
+#define BENCHMARK_REGISTER_F(BaseClass, Method) \
+  BENCHMARK_PRIVATE_REGISTER_F(BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method))
+
+#define BENCHMARK_PRIVATE_REGISTER_F(TestName) \
+  BENCHMARK_PRIVATE_DECLARE(TestName) =        \
+      (::benchmark::internal::RegisterBenchmarkInternal(new TestName()))
+
+// This macro will define and register a benchmark within a fixture class.
+#define BENCHMARK_F(BaseClass, Method)           \
+  BENCHMARK_PRIVATE_DECLARE_F(BaseClass, Method) \
+  BENCHMARK_REGISTER_F(BaseClass, Method);       \
+  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
+
+#define BENCHMARK_TEMPLATE1_F(BaseClass, Method, a)           \
+  BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(BaseClass, Method, a) \
+  BENCHMARK_REGISTER_F(BaseClass, Method);                    \
+  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
+
+#define BENCHMARK_TEMPLATE2_F(BaseClass, Method, a, b)           \
+  BENCHMARK_TEMPLATE2_PRIVATE_DECLARE_F(BaseClass, Method, a, b) \
+  BENCHMARK_REGISTER_F(BaseClass, Method);                       \
+  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
+
+#ifdef BENCHMARK_HAS_CXX11
+#define BENCHMARK_TEMPLATE_F(BaseClass, Method, ...)                   \
+  BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(BaseClass, Method, __VA_ARGS__) \
+  BENCHMARK_REGISTER_F(BaseClass, Method);                             \
+  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
+#else
+#define BENCHMARK_TEMPLATE_F(BaseClass, Method, a) \
+  BENCHMARK_TEMPLATE1_F(BaseClass, Method, a)
+#endif
+
+// Helper macro to create a main routine in a test that runs the benchmarks
+#define BENCHMARK_MAIN()                                                \
+  int main(int argc, char** argv) {                                     \
+    ::benchmark::Initialize(&argc, argv);                               \
+    if (::benchmark::ReportUnrecognizedArguments(argc, argv)) return 1; \
+    ::benchmark::RunSpecifiedBenchmarks();                              \
+    ::benchmark::Shutdown();                                            \
+    return 0;                                                           \
+  }                                                                     \
+  int main(int, char**)
+
+// ------------------------------------------------------
+// Benchmark Reporters
+
+namespace benchmark {
+
+struct CPUInfo {
+  struct CacheInfo {
+    std::string type;
+    int level;
+    int size;
+    int num_sharing;
+  };
+
+  enum Scaling { UNKNOWN, ENABLED, DISABLED };
+
+  int num_cpus;
+  Scaling scaling;
+  double cycles_per_second;
+  std::vector<CacheInfo> caches;
+  std::vector<double> load_avg;
+
+  static const CPUInfo& Get();
+
+ private:
+  CPUInfo();
+  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(CPUInfo);
+};
+
+// Adding Struct for System Information
+struct SystemInfo {
+  std::string name;
+  static const SystemInfo& Get();
+
+ private:
+  SystemInfo();
+  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(SystemInfo);
+};
+
+// BenchmarkName contains the components of the Benchmark's name
+// which allows individual fields to be modified or cleared before
+// building the final name using 'str()'.
+struct BenchmarkName {
+  std::string function_name;
+  std::string args;
+  std::string min_time;
+  std::string iterations;
+  std::string repetitions;
+  std::string time_type;
+  std::string threads;
+
+  // Return the full name of the benchmark with each non-empty
+  // field separated by a '/'
+  std::string str() const;
+};
+
+// Interface for custom benchmark result printers.
+// By default, benchmark reports are printed to stdout. However an application
+// can control the destination of the reports by calling
+// RunSpecifiedBenchmarks and passing it a custom reporter object.
+// The reporter object must implement the following interface.
+class BenchmarkReporter {
+ public:
+  struct Context {
+    CPUInfo const& cpu_info;
+    SystemInfo const& sys_info;
+    // The number of chars in the longest benchmark name.
+    size_t name_field_width;
+    static const char* executable_name;
+    Context();
+  };
+
+  struct Run {
+    static const int64_t no_repetition_index = -1;
+    enum RunType { RT_Iteration, RT_Aggregate };
+
+    Run()
+        : run_type(RT_Iteration),
+          aggregate_unit(kTime),
+          error_occurred(false),
+          iterations(1),
+          threads(1),
+          time_unit(kNanosecond),
+          real_accumulated_time(0),
+          cpu_accumulated_time(0),
+          max_heapbytes_used(0),
+          complexity(oNone),
+          complexity_lambda(),
+          complexity_n(0),
+          report_big_o(false),
+          report_rms(false),
+          memory_result(NULL),
+          allocs_per_iter(0.0) {}
+
+    std::string benchmark_name() const;
+    BenchmarkName run_name;
+    int64_t family_index;
+    int64_t per_family_instance_index;
+    RunType run_type;
+    std::string aggregate_name;
+    StatisticUnit aggregate_unit;
+    std::string report_label;  // Empty if not set by benchmark.
+    bool error_occurred;
+    std::string error_message;
+
+    IterationCount iterations;
+    int64_t threads;
+    int64_t repetition_index;
+    int64_t repetitions;
+    TimeUnit time_unit;
+    double real_accumulated_time;
+    double cpu_accumulated_time;
+
+    // Return a value representing the real time per iteration in the unit
+    // specified by 'time_unit'.
+    // NOTE: If 'iterations' is zero the returned value represents the
+    // accumulated time.
+    double GetAdjustedRealTime() const;
+
+    // Return a value representing the cpu time per iteration in the unit
+    // specified by 'time_unit'.
+    // NOTE: If 'iterations' is zero the returned value represents the
+    // accumulated time.
+    double GetAdjustedCPUTime() const;
+
+    // This is set to 0.0 if memory tracing is not enabled.
+    double max_heapbytes_used;
+
+    // Keep track of arguments to compute asymptotic complexity
+    BigO complexity;
+    BigOFunc* complexity_lambda;
+    int64_t complexity_n;
+
+    // what statistics to compute from the measurements
+    const std::vector<internal::Statistics>* statistics;
+
+    // Inform print function whether the current run is a complexity report
+    bool report_big_o;
+    bool report_rms;
+
+    UserCounters counters;
+
+    // Memory metrics.
+    const MemoryManager::Result* memory_result;
+    double allocs_per_iter;
+  };
+
+  struct PerFamilyRunReports {
+    PerFamilyRunReports() : num_runs_total(0), num_runs_done(0) {}
+
+    // How many runs will all instances of this benchmark perform?
+    int num_runs_total;
+
+    // How many runs have happened already?
+    int num_runs_done;
+
+    // The reports about (non-errneous!) runs of this family.
+    std::vector<BenchmarkReporter::Run> Runs;
+  };
+
+  // Construct a BenchmarkReporter with the output stream set to 'std::cout'
+  // and the error stream set to 'std::cerr'
+  BenchmarkReporter();
+
+  // Called once for every suite of benchmarks run.
+  // The parameter "context" contains information that the
+  // reporter may wish to use when generating its report, for example the
+  // platform under which the benchmarks are running. The benchmark run is
+  // never started if this function returns false, allowing the reporter
+  // to skip runs based on the context information.
+  virtual bool ReportContext(const Context& context) = 0;
+
+  // Called once for each group of benchmark runs, gives information about
+  // cpu-time and heap memory usage during the benchmark run. If the group
+  // of runs contained more than two entries then 'report' contains additional
+  // elements representing the mean and standard deviation of those runs.
+  // Additionally if this group of runs was the last in a family of benchmarks
+  // 'reports' contains additional entries representing the asymptotic
+  // complexity and RMS of that benchmark family.
+  virtual void ReportRuns(const std::vector<Run>& report) = 0;
+
+  // Called once and only once after ever group of benchmarks is run and
+  // reported.
+  virtual void Finalize() {}
+
+  // REQUIRES: The object referenced by 'out' is valid for the lifetime
+  // of the reporter.
+  void SetOutputStream(std::ostream* out) {
+    assert(out);
+    output_stream_ = out;
+  }
+
+  // REQUIRES: The object referenced by 'err' is valid for the lifetime
+  // of the reporter.
+  void SetErrorStream(std::ostream* err) {
+    assert(err);
+    error_stream_ = err;
+  }
+
+  std::ostream& GetOutputStream() const { return *output_stream_; }
+
+  std::ostream& GetErrorStream() const { return *error_stream_; }
+
+  virtual ~BenchmarkReporter();
+
+  // Write a human readable string to 'out' representing the specified
+  // 'context'.
+  // REQUIRES: 'out' is non-null.
+  static void PrintBasicContext(std::ostream* out, Context const& context);
+
+ private:
+  std::ostream* output_stream_;
+  std::ostream* error_stream_;
+};
+
+// Simple reporter that outputs benchmark data to the console. This is the
+// default reporter used by RunSpecifiedBenchmarks().
+class ConsoleReporter : public BenchmarkReporter {
+ public:
+  enum OutputOptions {
+    OO_None = 0,
+    OO_Color = 1,
+    OO_Tabular = 2,
+    OO_ColorTabular = OO_Color | OO_Tabular,
+    OO_Defaults = OO_ColorTabular
+  };
+  explicit ConsoleReporter(OutputOptions opts_ = OO_Defaults)
+      : output_options_(opts_), name_field_width_(0), printed_header_(false) {}
+
+  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE;
+  virtual void ReportRuns(const std::vector<Run>& reports) BENCHMARK_OVERRIDE;
+
+ protected:
+  virtual void PrintRunData(const Run& report);
+  virtual void PrintHeader(const Run& report);
+
+  OutputOptions output_options_;
+  size_t name_field_width_;
+  UserCounters prev_counters_;
+  bool printed_header_;
+};
+
+class JSONReporter : public BenchmarkReporter {
+ public:
+  JSONReporter() : first_report_(true) {}
+  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE;
+  virtual void ReportRuns(const std::vector<Run>& reports) BENCHMARK_OVERRIDE;
+  virtual void Finalize() BENCHMARK_OVERRIDE;
+
+ private:
+  void PrintRunData(const Run& report);
+
+  bool first_report_;
+};
+
+class BENCHMARK_DEPRECATED_MSG(
+    "The CSV Reporter will be removed in a future release") CSVReporter
+    : public BenchmarkReporter {
+ public:
+  CSVReporter() : printed_header_(false) {}
+  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE;
+  virtual void ReportRuns(const std::vector<Run>& reports) BENCHMARK_OVERRIDE;
+
+ private:
+  void PrintRunData(const Run& report);
+
+  bool printed_header_;
+  std::set<std::string> user_counter_names_;
+};
+
+inline const char* GetTimeUnitString(TimeUnit unit) {
+  switch (unit) {
+    case kSecond:
+      return "s";
+    case kMillisecond:
+      return "ms";
+    case kMicrosecond:
+      return "us";
+    case kNanosecond:
+      return "ns";
+  }
+  BENCHMARK_UNREACHABLE();
+}
+
+inline double GetTimeUnitMultiplier(TimeUnit unit) {
+  switch (unit) {
+    case kSecond:
+      return 1;
+    case kMillisecond:
+      return 1e3;
+    case kMicrosecond:
+      return 1e6;
+    case kNanosecond:
+      return 1e9;
+  }
+  BENCHMARK_UNREACHABLE();
+}
+
+// Creates a list of integer values for the given range and multiplier.
+// This can be used together with ArgsProduct() to allow multiple ranges
+// with different multiplers.
+// Example:
+// ArgsProduct({
+//   CreateRange(0, 1024, /*multi=*/32),
+//   CreateRange(0, 100, /*multi=*/4),
+//   CreateDenseRange(0, 4, /*step=*/1),
+// });
+std::vector<int64_t> CreateRange(int64_t lo, int64_t hi, int multi);
+
+// Creates a list of integer values for the given range and step.
+std::vector<int64_t> CreateDenseRange(int64_t start, int64_t limit, int step);
+
+}  // namespace benchmark
+
+#endif  // BENCHMARK_BENCHMARK_H_
diff --git a/3rdparty/benchmark/requirements.txt b/3rdparty/benchmark/requirements.txt
new file mode 100644
index 00000000..e451894e
--- /dev/null
+++ b/3rdparty/benchmark/requirements.txt
@@ -0,0 +1,3 @@
+numpy == 1.19.4
+scipy == 1.5.4
+pandas == 1.1.5
diff --git a/3rdparty/benchmark/setup.py b/3rdparty/benchmark/setup.py
new file mode 100644
index 00000000..4eaccf84
--- /dev/null
+++ b/3rdparty/benchmark/setup.py
@@ -0,0 +1,143 @@
+import os
+import posixpath
+import platform
+import re
+import shutil
+import sys
+
+from distutils import sysconfig
+import setuptools
+from setuptools.command import build_ext
+
+
+HERE = os.path.dirname(os.path.abspath(__file__))
+
+
+IS_WINDOWS = sys.platform.startswith("win")
+
+
+def _get_version():
+    """Parse the version string from __init__.py."""
+    with open(
+        os.path.join(HERE, "bindings", "python", "google_benchmark", "__init__.py")
+    ) as init_file:
+        try:
+            version_line = next(
+                line for line in init_file if line.startswith("__version__")
+            )
+        except StopIteration:
+            raise ValueError("__version__ not defined in __init__.py")
+        else:
+            namespace = {}
+            exec(version_line, namespace)  # pylint: disable=exec-used
+            return namespace["__version__"]
+
+
+def _parse_requirements(path):
+    with open(os.path.join(HERE, path)) as requirements:
+        return [
+            line.rstrip()
+            for line in requirements
+            if not (line.isspace() or line.startswith("#"))
+        ]
+
+
+class BazelExtension(setuptools.Extension):
+    """A C/C++ extension that is defined as a Bazel BUILD target."""
+
+    def __init__(self, name, bazel_target):
+        self.bazel_target = bazel_target
+        self.relpath, self.target_name = posixpath.relpath(bazel_target, "//").split(
+            ":"
+        )
+        setuptools.Extension.__init__(self, name, sources=[])
+
+
+class BuildBazelExtension(build_ext.build_ext):
+    """A command that runs Bazel to build a C/C++ extension."""
+
+    def run(self):
+        for ext in self.extensions:
+            self.bazel_build(ext)
+        build_ext.build_ext.run(self)
+
+    def bazel_build(self, ext):
+        """Runs the bazel build to create the package."""
+        with open("WORKSPACE", "r") as workspace:
+            workspace_contents = workspace.read()
+
+        with open("WORKSPACE", "w") as workspace:
+            workspace.write(
+                re.sub(
+                    r'(?<=path = ").*(?=",  # May be overwritten by setup\.py\.)',
+                    sysconfig.get_python_inc().replace(os.path.sep, posixpath.sep),
+                    workspace_contents,
+                )
+            )
+
+        if not os.path.exists(self.build_temp):
+            os.makedirs(self.build_temp)
+
+        bazel_argv = [
+            "bazel",
+            "build",
+            ext.bazel_target,
+            "--symlink_prefix=" + os.path.join(self.build_temp, "bazel-"),
+            "--compilation_mode=" + ("dbg" if self.debug else "opt"),
+        ]
+
+        if IS_WINDOWS:
+            # Link with python*.lib.
+            for library_dir in self.library_dirs:
+                bazel_argv.append("--linkopt=/LIBPATH:" + library_dir)
+        elif sys.platform == "darwin" and platform.machine() == "x86_64":
+            bazel_argv.append("--macos_minimum_os=10.9")
+
+        self.spawn(bazel_argv)
+
+        shared_lib_suffix = '.dll' if IS_WINDOWS else '.so'
+        ext_bazel_bin_path = os.path.join(
+            self.build_temp, 'bazel-bin',
+            ext.relpath, ext.target_name + shared_lib_suffix)
+
+        ext_dest_path = self.get_ext_fullpath(ext.name)
+        ext_dest_dir = os.path.dirname(ext_dest_path)
+        if not os.path.exists(ext_dest_dir):
+            os.makedirs(ext_dest_dir)
+        shutil.copyfile(ext_bazel_bin_path, ext_dest_path)
+
+
+setuptools.setup(
+    name="google_benchmark",
+    version=_get_version(),
+    url="https://github.com/google/benchmark",
+    description="A library to benchmark code snippets.",
+    author="Google",
+    author_email="benchmark-py@google.com",
+    # Contained modules and scripts.
+    package_dir={"": "bindings/python"},
+    packages=setuptools.find_packages("bindings/python"),
+    install_requires=_parse_requirements("bindings/python/requirements.txt"),
+    cmdclass=dict(build_ext=BuildBazelExtension),
+    ext_modules=[
+        BazelExtension(
+            "google_benchmark._benchmark",
+            "//bindings/python/google_benchmark:_benchmark",
+        )
+    ],
+    zip_safe=False,
+    # PyPI package information.
+    classifiers=[
+        "Development Status :: 4 - Beta",
+        "Intended Audience :: Developers",
+        "Intended Audience :: Science/Research",
+        "License :: OSI Approved :: Apache Software License",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Topic :: Software Development :: Testing",
+        "Topic :: System :: Benchmark",
+    ],
+    license="Apache 2.0",
+    keywords="benchmark",
+)
diff --git a/3rdparty/benchmark/src/CMakeLists.txt b/3rdparty/benchmark/src/CMakeLists.txt
new file mode 100644
index 00000000..e814a4e0
--- /dev/null
+++ b/3rdparty/benchmark/src/CMakeLists.txt
@@ -0,0 +1,159 @@
+# Allow the source files to find headers in src/
+include(GNUInstallDirs)
+include_directories(${PROJECT_SOURCE_DIR}/src)
+
+if (DEFINED BENCHMARK_CXX_LINKER_FLAGS)
+  list(APPEND CMAKE_SHARED_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
+  list(APPEND CMAKE_MODULE_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
+endif()
+
+file(GLOB
+  SOURCE_FILES
+    *.cc
+    ${PROJECT_SOURCE_DIR}/include/benchmark/*.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/*.h)
+file(GLOB BENCHMARK_MAIN "benchmark_main.cc")
+foreach(item ${BENCHMARK_MAIN})
+  list(REMOVE_ITEM SOURCE_FILES "${item}")
+endforeach()
+
+add_library(benchmark ${SOURCE_FILES})
+add_library(benchmark::benchmark ALIAS benchmark)
+set_target_properties(benchmark PROPERTIES
+  OUTPUT_NAME "benchmark"
+  VERSION ${GENERIC_LIB_VERSION}
+  SOVERSION ${GENERIC_LIB_SOVERSION}
+)
+target_include_directories(benchmark PUBLIC
+  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>)
+
+# libpfm, if available
+if (HAVE_LIBPFM)
+  target_link_libraries(benchmark PRIVATE pfm)
+  add_definitions(-DHAVE_LIBPFM)
+endif()
+
+# Link threads.
+target_link_libraries(benchmark PRIVATE Threads::Threads)
+
+target_link_libraries(benchmark PRIVATE ${BENCHMARK_CXX_LIBRARIES})
+
+if(HAVE_LIB_RT)
+  target_link_libraries(benchmark PRIVATE rt)
+endif(HAVE_LIB_RT)
+
+
+# We need extra libraries on Windows
+if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
+  target_link_libraries(benchmark PRIVATE shlwapi)
+endif()
+
+# We need extra libraries on Solaris
+if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+  target_link_libraries(benchmark PRIVATE kstat)
+endif()
+
+# Benchmark main library
+add_library(benchmark_main "benchmark_main.cc")
+add_library(benchmark::benchmark_main ALIAS benchmark_main)
+set_target_properties(benchmark_main PROPERTIES
+  OUTPUT_NAME "benchmark_main"
+  VERSION ${GENERIC_LIB_VERSION}
+  SOVERSION ${GENERIC_LIB_SOVERSION}
+)
+target_link_libraries(benchmark_main PUBLIC benchmark::benchmark)
+
+
+set(generated_dir "${PROJECT_BINARY_DIR}")
+
+set(version_config "${generated_dir}/${PROJECT_NAME}ConfigVersion.cmake")
+set(project_config "${generated_dir}/${PROJECT_NAME}Config.cmake")
+set(pkg_config "${generated_dir}/${PROJECT_NAME}.pc")
+set(targets_to_export benchmark benchmark_main)
+set(targets_export_name "${PROJECT_NAME}Targets")
+
+set(namespace "${PROJECT_NAME}::")
+
+include(CMakePackageConfigHelpers)
+
+configure_package_config_file (
+  ${PROJECT_SOURCE_DIR}/cmake/Config.cmake.in
+  ${project_config}
+  INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
+  NO_SET_AND_CHECK_MACRO
+  NO_CHECK_REQUIRED_COMPONENTS_MACRO
+)
+write_basic_package_version_file(
+  "${version_config}" VERSION ${GENERIC_LIB_VERSION} COMPATIBILITY SameMajorVersion
+)
+
+configure_file("${PROJECT_SOURCE_DIR}/cmake/benchmark.pc.in" "${pkg_config}" @ONLY)
+
+export (
+  TARGETS ${targets_to_export}
+  NAMESPACE "${namespace}"
+  FILE ${generated_dir}/${targets_export_name}.cmake
+)
+
+if (BENCHMARK_ENABLE_INSTALL)
+  # Install target (will install the library to specified CMAKE_INSTALL_PREFIX variable)
+  install(
+    TARGETS ${targets_to_export}
+    EXPORT ${targets_export_name}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+    INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+
+  install(
+    DIRECTORY "${PROJECT_SOURCE_DIR}/include/benchmark"
+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+    FILES_MATCHING PATTERN "*.*h")
+
+  install(
+      FILES "${project_config}" "${version_config}"
+      DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
+
+  install(
+      FILES "${pkg_config}"
+      DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+
+  install(
+      EXPORT "${targets_export_name}"
+      NAMESPACE "${namespace}"
+      DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
+endif()
+
+if (BENCHMARK_ENABLE_DOXYGEN)
+  find_package(Doxygen REQUIRED)
+  set(DOXYGEN_QUIET YES)
+  set(DOXYGEN_RECURSIVE YES)
+  set(DOXYGEN_GENERATE_HTML YES)
+  set(DOXYGEN_GENERATE_MAN NO)
+  set(DOXYGEN_MARKDOWN_SUPPORT YES)
+  set(DOXYGEN_BUILTIN_STL_SUPPORT YES)
+  set(DOXYGEN_EXTRACT_PACKAGE YES)
+  set(DOXYGEN_EXTRACT_STATIC YES)
+  set(DOXYGEN_SHOW_INCLUDE_FILES YES)
+  set(DOXYGEN_BINARY_TOC YES)
+  set(DOXYGEN_TOC_EXPAND YES)
+  set(DOXYGEN_USE_MDFILE_AS_MAINPAGE "index.md")
+  doxygen_add_docs(benchmark_doxygen
+    docs
+    include
+    src
+    ALL
+    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+    COMMENT "Building documentation with Doxygen.")
+  if (BENCHMARK_ENABLE_INSTALL AND BENCHMARK_INSTALL_DOCS)
+    install(
+      DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/html/"
+      DESTINATION ${CMAKE_INSTALL_DOCDIR})
+  endif()
+else()
+  if (BENCHMARK_ENABLE_INSTALL AND BENCHMARK_INSTALL_DOCS)
+    install(
+      DIRECTORY "${PROJECT_SOURCE_DIR}/docs/"
+      DESTINATION ${CMAKE_INSTALL_DOCDIR})
+  endif()
+endif()
diff --git a/3rdparty/benchmark/src/arraysize.h b/3rdparty/benchmark/src/arraysize.h
new file mode 100644
index 00000000..51a50f2d
--- /dev/null
+++ b/3rdparty/benchmark/src/arraysize.h
@@ -0,0 +1,33 @@
+#ifndef BENCHMARK_ARRAYSIZE_H_
+#define BENCHMARK_ARRAYSIZE_H_
+
+#include "internal_macros.h"
+
+namespace benchmark {
+namespace internal {
+// The arraysize(arr) macro returns the # of elements in an array arr.
+// The expression is a compile-time constant, and therefore can be
+// used in defining new arrays, for example.  If you use arraysize on
+// a pointer by mistake, you will get a compile-time error.
+//
+
+// This template function declaration is used in defining arraysize.
+// Note that the function doesn't need an implementation, as we only
+// use its type.
+template <typename T, size_t N>
+char (&ArraySizeHelper(T (&array)[N]))[N];
+
+// That gcc wants both of these prototypes seems mysterious. VC, for
+// its part, can't decide which to use (another mystery). Matching of
+// template overloads: the final frontier.
+#ifndef COMPILER_MSVC
+template <typename T, size_t N>
+char (&ArraySizeHelper(const T (&array)[N]))[N];
+#endif
+
+#define arraysize(array) (sizeof(::benchmark::internal::ArraySizeHelper(array)))
+
+}  // end namespace internal
+}  // end namespace benchmark
+
+#endif  // BENCHMARK_ARRAYSIZE_H_
diff --git a/3rdparty/benchmark/src/benchmark.cc b/3rdparty/benchmark/src/benchmark.cc
new file mode 100644
index 00000000..cedeee31
--- /dev/null
+++ b/3rdparty/benchmark/src/benchmark.cc
@@ -0,0 +1,626 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "benchmark/benchmark.h"
+
+#include "benchmark_api_internal.h"
+#include "benchmark_runner.h"
+#include "internal_macros.h"
+
+#ifndef BENCHMARK_OS_WINDOWS
+#ifndef BENCHMARK_OS_FUCHSIA
+#include <sys/resource.h>
+#endif
+#include <sys/time.h>
+#include <unistd.h>
+#endif
+
+#include <algorithm>
+#include <atomic>
+#include <condition_variable>
+#include <cstdio>
+#include <cstdlib>
+#include <fstream>
+#include <iostream>
+#include <limits>
+#include <map>
+#include <memory>
+#include <random>
+#include <string>
+#include <thread>
+#include <utility>
+
+#include "check.h"
+#include "colorprint.h"
+#include "commandlineflags.h"
+#include "complexity.h"
+#include "counter.h"
+#include "internal_macros.h"
+#include "log.h"
+#include "mutex.h"
+#include "perf_counters.h"
+#include "re.h"
+#include "statistics.h"
+#include "string_util.h"
+#include "thread_manager.h"
+#include "thread_timer.h"
+
+namespace benchmark {
+// Print a list of benchmarks. This option overrides all other options.
+BM_DEFINE_bool(benchmark_list_tests, false);
+
+// A regular expression that specifies the set of benchmarks to execute.  If
+// this flag is empty, or if this flag is the string \"all\", all benchmarks
+// linked into the binary are run.
+BM_DEFINE_string(benchmark_filter, "");
+
+// Minimum number of seconds we should run benchmark before results are
+// considered significant.  For cpu-time based tests, this is the lower bound
+// on the total cpu time used by all threads that make up the test.  For
+// real-time based tests, this is the lower bound on the elapsed time of the
+// benchmark execution, regardless of number of threads.
+BM_DEFINE_double(benchmark_min_time, 0.5);
+
+// The number of runs of each benchmark. If greater than 1, the mean and
+// standard deviation of the runs will be reported.
+BM_DEFINE_int32(benchmark_repetitions, 1);
+
+// If set, enable random interleaving of repetitions of all benchmarks.
+// See http://github.com/google/benchmark/issues/1051 for details.
+BM_DEFINE_bool(benchmark_enable_random_interleaving, false);
+
+// Report the result of each benchmark repetitions. When 'true' is specified
+// only the mean, standard deviation, and other statistics are reported for
+// repeated benchmarks. Affects all reporters.
+BM_DEFINE_bool(benchmark_report_aggregates_only, false);
+
+// Display the result of each benchmark repetitions. When 'true' is specified
+// only the mean, standard deviation, and other statistics are displayed for
+// repeated benchmarks. Unlike benchmark_report_aggregates_only, only affects
+// the display reporter, but  *NOT* file reporter, which will still contain
+// all the output.
+BM_DEFINE_bool(benchmark_display_aggregates_only, false);
+
+// The format to use for console output.
+// Valid values are 'console', 'json', or 'csv'.
+BM_DEFINE_string(benchmark_format, "console");
+
+// The format to use for file output.
+// Valid values are 'console', 'json', or 'csv'.
+BM_DEFINE_string(benchmark_out_format, "json");
+
+// The file to write additional output to.
+BM_DEFINE_string(benchmark_out, "");
+
+// Whether to use colors in the output.  Valid values:
+// 'true'/'yes'/1, 'false'/'no'/0, and 'auto'. 'auto' means to use colors if
+// the output is being sent to a terminal and the TERM environment variable is
+// set to a terminal type that supports colors.
+BM_DEFINE_string(benchmark_color, "auto");
+
+// Whether to use tabular format when printing user counters to the console.
+// Valid values: 'true'/'yes'/1, 'false'/'no'/0.  Defaults to false.
+BM_DEFINE_bool(benchmark_counters_tabular, false);
+
+// List of additional perf counters to collect, in libpfm format. For more
+// information about libpfm: https://man7.org/linux/man-pages/man3/libpfm.3.html
+BM_DEFINE_string(benchmark_perf_counters, "");
+
+// Extra context to include in the output formatted as comma-separated key-value
+// pairs. Kept internal as it's only used for parsing from env/command line.
+BM_DEFINE_kvpairs(benchmark_context, {});
+
+// The level of verbose logging to output
+BM_DEFINE_int32(v, 0);
+
+namespace internal {
+
+std::map<std::string, std::string>* global_context = nullptr;
+
+// FIXME: wouldn't LTO mess this up?
+void UseCharPointer(char const volatile*) {}
+
+}  // namespace internal
+
+State::State(IterationCount max_iters, const std::vector<int64_t>& ranges,
+             int thread_i, int n_threads, internal::ThreadTimer* timer,
+             internal::ThreadManager* manager,
+             internal::PerfCountersMeasurement* perf_counters_measurement)
+    : total_iterations_(0),
+      batch_leftover_(0),
+      max_iterations(max_iters),
+      started_(false),
+      finished_(false),
+      error_occurred_(false),
+      range_(ranges),
+      complexity_n_(0),
+      thread_index_(thread_i),
+      threads_(n_threads),
+      timer_(timer),
+      manager_(manager),
+      perf_counters_measurement_(perf_counters_measurement) {
+  BM_CHECK(max_iterations != 0) << "At least one iteration must be run";
+  BM_CHECK_LT(thread_index_, threads_)
+      << "thread_index must be less than threads";
+
+  // Note: The use of offsetof below is technically undefined until C++17
+  // because State is not a standard layout type. However, all compilers
+  // currently provide well-defined behavior as an extension (which is
+  // demonstrated since constexpr evaluation must diagnose all undefined
+  // behavior). However, GCC and Clang also warn about this use of offsetof,
+  // which must be suppressed.
+#if defined(__INTEL_COMPILER)
+#pragma warning push
+#pragma warning(disable : 1875)
+#elif defined(__GNUC__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Winvalid-offsetof"
+#endif
+  // Offset tests to ensure commonly accessed data is on the first cache line.
+  const int cache_line_size = 64;
+  static_assert(offsetof(State, error_occurred_) <=
+                    (cache_line_size - sizeof(error_occurred_)),
+                "");
+#if defined(__INTEL_COMPILER)
+#pragma warning pop
+#elif defined(__GNUC__)
+#pragma GCC diagnostic pop
+#endif
+}
+
+void State::PauseTiming() {
+  // Add in time accumulated so far
+  BM_CHECK(started_ && !finished_ && !error_occurred_);
+  timer_->StopTimer();
+  if (perf_counters_measurement_) {
+    auto measurements = perf_counters_measurement_->StopAndGetMeasurements();
+    for (const auto& name_and_measurement : measurements) {
+      auto name = name_and_measurement.first;
+      auto measurement = name_and_measurement.second;
+      BM_CHECK_EQ(counters[name], 0.0);
+      counters[name] = Counter(measurement, Counter::kAvgIterations);
+    }
+  }
+}
+
+void State::ResumeTiming() {
+  BM_CHECK(started_ && !finished_ && !error_occurred_);
+  timer_->StartTimer();
+  if (perf_counters_measurement_) {
+    perf_counters_measurement_->Start();
+  }
+}
+
+void State::SkipWithError(const char* msg) {
+  BM_CHECK(msg);
+  error_occurred_ = true;
+  {
+    MutexLock l(manager_->GetBenchmarkMutex());
+    if (manager_->results.has_error_ == false) {
+      manager_->results.error_message_ = msg;
+      manager_->results.has_error_ = true;
+    }
+  }
+  total_iterations_ = 0;
+  if (timer_->running()) timer_->StopTimer();
+}
+
+void State::SetIterationTime(double seconds) {
+  timer_->SetIterationTime(seconds);
+}
+
+void State::SetLabel(const char* label) {
+  MutexLock l(manager_->GetBenchmarkMutex());
+  manager_->results.report_label_ = label;
+}
+
+void State::StartKeepRunning() {
+  BM_CHECK(!started_ && !finished_);
+  started_ = true;
+  total_iterations_ = error_occurred_ ? 0 : max_iterations;
+  manager_->StartStopBarrier();
+  if (!error_occurred_) ResumeTiming();
+}
+
+void State::FinishKeepRunning() {
+  BM_CHECK(started_ && (!finished_ || error_occurred_));
+  if (!error_occurred_) {
+    PauseTiming();
+  }
+  // Total iterations has now wrapped around past 0. Fix this.
+  total_iterations_ = 0;
+  finished_ = true;
+  manager_->StartStopBarrier();
+}
+
+namespace internal {
+namespace {
+
+// Flushes streams after invoking reporter methods that write to them. This
+// ensures users get timely updates even when streams are not line-buffered.
+void FlushStreams(BenchmarkReporter* reporter) {
+  if (!reporter) return;
+  std::flush(reporter->GetOutputStream());
+  std::flush(reporter->GetErrorStream());
+}
+
+// Reports in both display and file reporters.
+void Report(BenchmarkReporter* display_reporter,
+            BenchmarkReporter* file_reporter, const RunResults& run_results) {
+  auto report_one = [](BenchmarkReporter* reporter, bool aggregates_only,
+                       const RunResults& results) {
+    assert(reporter);
+    // If there are no aggregates, do output non-aggregates.
+    aggregates_only &= !results.aggregates_only.empty();
+    if (!aggregates_only) reporter->ReportRuns(results.non_aggregates);
+    if (!results.aggregates_only.empty())
+      reporter->ReportRuns(results.aggregates_only);
+  };
+
+  report_one(display_reporter, run_results.display_report_aggregates_only,
+             run_results);
+  if (file_reporter)
+    report_one(file_reporter, run_results.file_report_aggregates_only,
+               run_results);
+
+  FlushStreams(display_reporter);
+  FlushStreams(file_reporter);
+}
+
+void RunBenchmarks(const std::vector<BenchmarkInstance>& benchmarks,
+                   BenchmarkReporter* display_reporter,
+                   BenchmarkReporter* file_reporter) {
+  // Note the file_reporter can be null.
+  BM_CHECK(display_reporter != nullptr);
+
+  // Determine the width of the name field using a minimum width of 10.
+  bool might_have_aggregates = FLAGS_benchmark_repetitions > 1;
+  size_t name_field_width = 10;
+  size_t stat_field_width = 0;
+  for (const BenchmarkInstance& benchmark : benchmarks) {
+    name_field_width =
+        std::max<size_t>(name_field_width, benchmark.name().str().size());
+    might_have_aggregates |= benchmark.repetitions() > 1;
+
+    for (const auto& Stat : benchmark.statistics())
+      stat_field_width = std::max<size_t>(stat_field_width, Stat.name_.size());
+  }
+  if (might_have_aggregates) name_field_width += 1 + stat_field_width;
+
+  // Print header here
+  BenchmarkReporter::Context context;
+  context.name_field_width = name_field_width;
+
+  // Keep track of running times of all instances of each benchmark family.
+  std::map<int /*family_index*/, BenchmarkReporter::PerFamilyRunReports>
+      per_family_reports;
+
+  if (display_reporter->ReportContext(context) &&
+      (!file_reporter || file_reporter->ReportContext(context))) {
+    FlushStreams(display_reporter);
+    FlushStreams(file_reporter);
+
+    size_t num_repetitions_total = 0;
+
+    std::vector<internal::BenchmarkRunner> runners;
+    runners.reserve(benchmarks.size());
+    for (const BenchmarkInstance& benchmark : benchmarks) {
+      BenchmarkReporter::PerFamilyRunReports* reports_for_family = nullptr;
+      if (benchmark.complexity() != oNone)
+        reports_for_family = &per_family_reports[benchmark.family_index()];
+
+      runners.emplace_back(benchmark, reports_for_family);
+      int num_repeats_of_this_instance = runners.back().GetNumRepeats();
+      num_repetitions_total += num_repeats_of_this_instance;
+      if (reports_for_family)
+        reports_for_family->num_runs_total += num_repeats_of_this_instance;
+    }
+    assert(runners.size() == benchmarks.size() && "Unexpected runner count.");
+
+    std::vector<size_t> repetition_indices;
+    repetition_indices.reserve(num_repetitions_total);
+    for (size_t runner_index = 0, num_runners = runners.size();
+         runner_index != num_runners; ++runner_index) {
+      const internal::BenchmarkRunner& runner = runners[runner_index];
+      std::fill_n(std::back_inserter(repetition_indices),
+                  runner.GetNumRepeats(), runner_index);
+    }
+    assert(repetition_indices.size() == num_repetitions_total &&
+           "Unexpected number of repetition indexes.");
+
+    if (FLAGS_benchmark_enable_random_interleaving) {
+      std::random_device rd;
+      std::mt19937 g(rd());
+      std::shuffle(repetition_indices.begin(), repetition_indices.end(), g);
+    }
+
+    for (size_t repetition_index : repetition_indices) {
+      internal::BenchmarkRunner& runner = runners[repetition_index];
+      runner.DoOneRepetition();
+      if (runner.HasRepeatsRemaining()) continue;
+      // FIXME: report each repetition separately, not all of them in bulk.
+
+      RunResults run_results = runner.GetResults();
+
+      // Maybe calculate complexity report
+      if (const auto* reports_for_family = runner.GetReportsForFamily()) {
+        if (reports_for_family->num_runs_done ==
+            reports_for_family->num_runs_total) {
+          auto additional_run_stats = ComputeBigO(reports_for_family->Runs);
+          run_results.aggregates_only.insert(run_results.aggregates_only.end(),
+                                             additional_run_stats.begin(),
+                                             additional_run_stats.end());
+          per_family_reports.erase(
+              static_cast<int>(reports_for_family->Runs.front().family_index));
+        }
+      }
+
+      Report(display_reporter, file_reporter, run_results);
+    }
+  }
+  display_reporter->Finalize();
+  if (file_reporter) file_reporter->Finalize();
+  FlushStreams(display_reporter);
+  FlushStreams(file_reporter);
+}
+
+// Disable deprecated warnings temporarily because we need to reference
+// CSVReporter but don't want to trigger -Werror=-Wdeprecated-declarations
+BENCHMARK_DISABLE_DEPRECATED_WARNING
+
+std::unique_ptr<BenchmarkReporter> CreateReporter(
+    std::string const& name, ConsoleReporter::OutputOptions output_opts) {
+  typedef std::unique_ptr<BenchmarkReporter> PtrType;
+  if (name == "console") {
+    return PtrType(new ConsoleReporter(output_opts));
+  } else if (name == "json") {
+    return PtrType(new JSONReporter);
+  } else if (name == "csv") {
+    return PtrType(new CSVReporter);
+  } else {
+    std::cerr << "Unexpected format: '" << name << "'\n";
+    std::exit(1);
+  }
+}
+
+BENCHMARK_RESTORE_DEPRECATED_WARNING
+
+}  // end namespace
+
+bool IsZero(double n) {
+  return std::abs(n) < std::numeric_limits<double>::epsilon();
+}
+
+ConsoleReporter::OutputOptions GetOutputOptions(bool force_no_color) {
+  int output_opts = ConsoleReporter::OO_Defaults;
+  auto is_benchmark_color = [force_no_color]() -> bool {
+    if (force_no_color) {
+      return false;
+    }
+    if (FLAGS_benchmark_color == "auto") {
+      return IsColorTerminal();
+    }
+    return IsTruthyFlagValue(FLAGS_benchmark_color);
+  };
+  if (is_benchmark_color()) {
+    output_opts |= ConsoleReporter::OO_Color;
+  } else {
+    output_opts &= ~ConsoleReporter::OO_Color;
+  }
+  if (FLAGS_benchmark_counters_tabular) {
+    output_opts |= ConsoleReporter::OO_Tabular;
+  } else {
+    output_opts &= ~ConsoleReporter::OO_Tabular;
+  }
+  return static_cast<ConsoleReporter::OutputOptions>(output_opts);
+}
+
+}  // end namespace internal
+
+size_t RunSpecifiedBenchmarks() {
+  return RunSpecifiedBenchmarks(nullptr, nullptr, FLAGS_benchmark_filter);
+}
+
+size_t RunSpecifiedBenchmarks(std::string spec) {
+  return RunSpecifiedBenchmarks(nullptr, nullptr, std::move(spec));
+}
+
+size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter) {
+  return RunSpecifiedBenchmarks(display_reporter, nullptr,
+                                FLAGS_benchmark_filter);
+}
+
+size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
+                              std::string spec) {
+  return RunSpecifiedBenchmarks(display_reporter, nullptr, std::move(spec));
+}
+
+size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
+                              BenchmarkReporter* file_reporter) {
+  return RunSpecifiedBenchmarks(display_reporter, file_reporter,
+                                FLAGS_benchmark_filter);
+}
+
+size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
+                              BenchmarkReporter* file_reporter,
+                              std::string spec) {
+  if (spec.empty() || spec == "all")
+    spec = ".";  // Regexp that matches all benchmarks
+
+  // Setup the reporters
+  std::ofstream output_file;
+  std::unique_ptr<BenchmarkReporter> default_display_reporter;
+  std::unique_ptr<BenchmarkReporter> default_file_reporter;
+  if (!display_reporter) {
+    default_display_reporter = internal::CreateReporter(
+        FLAGS_benchmark_format, internal::GetOutputOptions());
+    display_reporter = default_display_reporter.get();
+  }
+  auto& Out = display_reporter->GetOutputStream();
+  auto& Err = display_reporter->GetErrorStream();
+
+  std::string const& fname = FLAGS_benchmark_out;
+  if (fname.empty() && file_reporter) {
+    Err << "A custom file reporter was provided but "
+           "--benchmark_out=<file> was not specified."
+        << std::endl;
+    std::exit(1);
+  }
+  if (!fname.empty()) {
+    output_file.open(fname);
+    if (!output_file.is_open()) {
+      Err << "invalid file name: '" << fname << "'" << std::endl;
+      std::exit(1);
+    }
+    if (!file_reporter) {
+      default_file_reporter = internal::CreateReporter(
+          FLAGS_benchmark_out_format, ConsoleReporter::OO_None);
+      file_reporter = default_file_reporter.get();
+    }
+    file_reporter->SetOutputStream(&output_file);
+    file_reporter->SetErrorStream(&output_file);
+  }
+
+  std::vector<internal::BenchmarkInstance> benchmarks;
+  if (!FindBenchmarksInternal(spec, &benchmarks, &Err)) return 0;
+
+  if (benchmarks.empty()) {
+    Err << "Failed to match any benchmarks against regex: " << spec << "\n";
+    return 0;
+  }
+
+  if (FLAGS_benchmark_list_tests) {
+    for (auto const& benchmark : benchmarks)
+      Out << benchmark.name().str() << "\n";
+  } else {
+    internal::RunBenchmarks(benchmarks, display_reporter, file_reporter);
+  }
+
+  return benchmarks.size();
+}
+
+std::string GetBenchmarkFilter() { return FLAGS_benchmark_filter; }
+
+void RegisterMemoryManager(MemoryManager* manager) {
+  internal::memory_manager = manager;
+}
+
+void AddCustomContext(const std::string& key, const std::string& value) {
+  if (internal::global_context == nullptr) {
+    internal::global_context = new std::map<std::string, std::string>();
+  }
+  if (!internal::global_context->emplace(key, value).second) {
+    std::cerr << "Failed to add custom context \"" << key << "\" as it already "
+              << "exists with value \"" << value << "\"\n";
+  }
+}
+
+namespace internal {
+
+void PrintUsageAndExit() {
+  fprintf(stdout,
+          "benchmark"
+          " [--benchmark_list_tests={true|false}]\n"
+          "          [--benchmark_filter=<regex>]\n"
+          "          [--benchmark_min_time=<min_time>]\n"
+          "          [--benchmark_repetitions=<num_repetitions>]\n"
+          "          [--benchmark_enable_random_interleaving={true|false}]\n"
+          "          [--benchmark_report_aggregates_only={true|false}]\n"
+          "          [--benchmark_display_aggregates_only={true|false}]\n"
+          "          [--benchmark_format=<console|json|csv>]\n"
+          "          [--benchmark_out=<filename>]\n"
+          "          [--benchmark_out_format=<json|console|csv>]\n"
+          "          [--benchmark_color={auto|true|false}]\n"
+          "          [--benchmark_counters_tabular={true|false}]\n"
+          "          [--benchmark_perf_counters=<counter>,...]\n"
+          "          [--benchmark_context=<key>=<value>,...]\n"
+          "          [--v=<verbosity>]\n");
+  exit(0);
+}
+
+void ParseCommandLineFlags(int* argc, char** argv) {
+  using namespace benchmark;
+  BenchmarkReporter::Context::executable_name =
+      (argc && *argc > 0) ? argv[0] : "unknown";
+  for (int i = 1; argc && i < *argc; ++i) {
+    if (ParseBoolFlag(argv[i], "benchmark_list_tests",
+                      &FLAGS_benchmark_list_tests) ||
+        ParseStringFlag(argv[i], "benchmark_filter", &FLAGS_benchmark_filter) ||
+        ParseDoubleFlag(argv[i], "benchmark_min_time",
+                        &FLAGS_benchmark_min_time) ||
+        ParseInt32Flag(argv[i], "benchmark_repetitions",
+                       &FLAGS_benchmark_repetitions) ||
+        ParseBoolFlag(argv[i], "benchmark_enable_random_interleaving",
+                      &FLAGS_benchmark_enable_random_interleaving) ||
+        ParseBoolFlag(argv[i], "benchmark_report_aggregates_only",
+                      &FLAGS_benchmark_report_aggregates_only) ||
+        ParseBoolFlag(argv[i], "benchmark_display_aggregates_only",
+                      &FLAGS_benchmark_display_aggregates_only) ||
+        ParseStringFlag(argv[i], "benchmark_format", &FLAGS_benchmark_format) ||
+        ParseStringFlag(argv[i], "benchmark_out", &FLAGS_benchmark_out) ||
+        ParseStringFlag(argv[i], "benchmark_out_format",
+                        &FLAGS_benchmark_out_format) ||
+        ParseStringFlag(argv[i], "benchmark_color", &FLAGS_benchmark_color) ||
+        ParseBoolFlag(argv[i], "benchmark_counters_tabular",
+                      &FLAGS_benchmark_counters_tabular) ||
+        ParseStringFlag(argv[i], "benchmark_perf_counters",
+                        &FLAGS_benchmark_perf_counters) ||
+        ParseKeyValueFlag(argv[i], "benchmark_context",
+                          &FLAGS_benchmark_context) ||
+        ParseInt32Flag(argv[i], "v", &FLAGS_v)) {
+      for (int j = i; j != *argc - 1; ++j) argv[j] = argv[j + 1];
+
+      --(*argc);
+      --i;
+    } else if (IsFlag(argv[i], "help")) {
+      PrintUsageAndExit();
+    }
+  }
+  for (auto const* flag :
+       {&FLAGS_benchmark_format, &FLAGS_benchmark_out_format}) {
+    if (*flag != "console" && *flag != "json" && *flag != "csv") {
+      PrintUsageAndExit();
+    }
+  }
+  if (FLAGS_benchmark_color.empty()) {
+    PrintUsageAndExit();
+  }
+  for (const auto& kv : FLAGS_benchmark_context) {
+    AddCustomContext(kv.first, kv.second);
+  }
+}
+
+int InitializeStreams() {
+  static std::ios_base::Init init;
+  return 0;
+}
+
+}  // end namespace internal
+
+void Initialize(int* argc, char** argv) {
+  internal::ParseCommandLineFlags(argc, argv);
+  internal::LogLevel() = FLAGS_v;
+}
+
+void Shutdown() { delete internal::global_context; }
+
+bool ReportUnrecognizedArguments(int argc, char** argv) {
+  for (int i = 1; i < argc; ++i) {
+    fprintf(stderr, "%s: error: unrecognized command-line flag: %s\n", argv[0],
+            argv[i]);
+  }
+  return argc > 1;
+}
+
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/benchmark_api_internal.cc b/3rdparty/benchmark/src/benchmark_api_internal.cc
new file mode 100644
index 00000000..4de36e3c
--- /dev/null
+++ b/3rdparty/benchmark/src/benchmark_api_internal.cc
@@ -0,0 +1,112 @@
+#include "benchmark_api_internal.h"
+
+#include <cinttypes>
+
+#include "string_util.h"
+
+namespace benchmark {
+namespace internal {
+
+BenchmarkInstance::BenchmarkInstance(Benchmark* benchmark, int family_idx,
+                                     int per_family_instance_idx,
+                                     const std::vector<int64_t>& args,
+                                     int thread_count)
+    : benchmark_(*benchmark),
+      family_index_(family_idx),
+      per_family_instance_index_(per_family_instance_idx),
+      aggregation_report_mode_(benchmark_.aggregation_report_mode_),
+      args_(args),
+      time_unit_(benchmark_.time_unit_),
+      measure_process_cpu_time_(benchmark_.measure_process_cpu_time_),
+      use_real_time_(benchmark_.use_real_time_),
+      use_manual_time_(benchmark_.use_manual_time_),
+      complexity_(benchmark_.complexity_),
+      complexity_lambda_(benchmark_.complexity_lambda_),
+      statistics_(benchmark_.statistics_),
+      repetitions_(benchmark_.repetitions_),
+      min_time_(benchmark_.min_time_),
+      iterations_(benchmark_.iterations_),
+      threads_(thread_count) {
+  name_.function_name = benchmark_.name_;
+
+  size_t arg_i = 0;
+  for (const auto& arg : args) {
+    if (!name_.args.empty()) {
+      name_.args += '/';
+    }
+
+    if (arg_i < benchmark->arg_names_.size()) {
+      const auto& arg_name = benchmark_.arg_names_[arg_i];
+      if (!arg_name.empty()) {
+        name_.args += StrFormat("%s:", arg_name.c_str());
+      }
+    }
+
+    name_.args += StrFormat("%" PRId64, arg);
+    ++arg_i;
+  }
+
+  if (!IsZero(benchmark->min_time_)) {
+    name_.min_time = StrFormat("min_time:%0.3f", benchmark_.min_time_);
+  }
+
+  if (benchmark_.iterations_ != 0) {
+    name_.iterations = StrFormat(
+        "iterations:%lu", static_cast<unsigned long>(benchmark_.iterations_));
+  }
+
+  if (benchmark_.repetitions_ != 0) {
+    name_.repetitions = StrFormat("repeats:%d", benchmark_.repetitions_);
+  }
+
+  if (benchmark_.measure_process_cpu_time_) {
+    name_.time_type = "process_time";
+  }
+
+  if (benchmark_.use_manual_time_) {
+    if (!name_.time_type.empty()) {
+      name_.time_type += '/';
+    }
+    name_.time_type += "manual_time";
+  } else if (benchmark_.use_real_time_) {
+    if (!name_.time_type.empty()) {
+      name_.time_type += '/';
+    }
+    name_.time_type += "real_time";
+  }
+
+  if (!benchmark_.thread_counts_.empty()) {
+    name_.threads = StrFormat("threads:%d", threads_);
+  }
+
+  setup_ = benchmark_.setup_;
+  teardown_ = benchmark_.teardown_;
+}
+
+State BenchmarkInstance::Run(
+    IterationCount iters, int thread_id, internal::ThreadTimer* timer,
+    internal::ThreadManager* manager,
+    internal::PerfCountersMeasurement* perf_counters_measurement) const {
+  State st(iters, args_, thread_id, threads_, timer, manager,
+           perf_counters_measurement);
+  benchmark_.Run(st);
+  return st;
+}
+
+void BenchmarkInstance::Setup() const {
+  if (setup_) {
+    State st(/*iters*/ 1, args_, /*thread_id*/ 0, threads_, nullptr, nullptr,
+             nullptr);
+    setup_(st);
+  }
+}
+
+void BenchmarkInstance::Teardown() const {
+  if (teardown_) {
+    State st(/*iters*/ 1, args_, /*thread_id*/ 0, threads_, nullptr, nullptr,
+             nullptr);
+    teardown_(st);
+  }
+}
+}  // namespace internal
+}  // namespace benchmark
diff --git a/3rdparty/benchmark/src/benchmark_api_internal.h b/3rdparty/benchmark/src/benchmark_api_internal.h
new file mode 100644
index 00000000..94c2b297
--- /dev/null
+++ b/3rdparty/benchmark/src/benchmark_api_internal.h
@@ -0,0 +1,84 @@
+#ifndef BENCHMARK_API_INTERNAL_H
+#define BENCHMARK_API_INTERNAL_H
+
+#include <cmath>
+#include <iosfwd>
+#include <limits>
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+#include "commandlineflags.h"
+
+namespace benchmark {
+namespace internal {
+
+// Information kept per benchmark we may want to run
+class BenchmarkInstance {
+ public:
+  BenchmarkInstance(Benchmark* benchmark, int family_index,
+                    int per_family_instance_index,
+                    const std::vector<int64_t>& args, int threads);
+
+  const BenchmarkName& name() const { return name_; }
+  int family_index() const { return family_index_; }
+  int per_family_instance_index() const { return per_family_instance_index_; }
+  AggregationReportMode aggregation_report_mode() const {
+    return aggregation_report_mode_;
+  }
+  TimeUnit time_unit() const { return time_unit_; }
+  bool measure_process_cpu_time() const { return measure_process_cpu_time_; }
+  bool use_real_time() const { return use_real_time_; }
+  bool use_manual_time() const { return use_manual_time_; }
+  BigO complexity() const { return complexity_; }
+  BigOFunc* complexity_lambda() const { return complexity_lambda_; }
+  const std::vector<Statistics>& statistics() const { return statistics_; }
+  int repetitions() const { return repetitions_; }
+  double min_time() const { return min_time_; }
+  IterationCount iterations() const { return iterations_; }
+  int threads() const { return threads_; }
+  void Setup() const;
+  void Teardown() const;
+
+  State Run(IterationCount iters, int thread_id, internal::ThreadTimer* timer,
+            internal::ThreadManager* manager,
+            internal::PerfCountersMeasurement* perf_counters_measurement) const;
+
+ private:
+  BenchmarkName name_;
+  Benchmark& benchmark_;
+  const int family_index_;
+  const int per_family_instance_index_;
+  AggregationReportMode aggregation_report_mode_;
+  const std::vector<int64_t>& args_;
+  TimeUnit time_unit_;
+  bool measure_process_cpu_time_;
+  bool use_real_time_;
+  bool use_manual_time_;
+  BigO complexity_;
+  BigOFunc* complexity_lambda_;
+  UserCounters counters_;
+  const std::vector<Statistics>& statistics_;
+  int repetitions_;
+  double min_time_;
+  IterationCount iterations_;
+  int threads_;  // Number of concurrent threads to us
+
+  typedef void (*callback_function)(const benchmark::State&);
+  callback_function setup_ = nullptr;
+  callback_function teardown_ = nullptr;
+};
+
+bool FindBenchmarksInternal(const std::string& re,
+                            std::vector<BenchmarkInstance>* benchmarks,
+                            std::ostream* Err);
+
+bool IsZero(double n);
+
+ConsoleReporter::OutputOptions GetOutputOptions(bool force_no_color = false);
+
+}  // end namespace internal
+}  // end namespace benchmark
+
+#endif  // BENCHMARK_API_INTERNAL_H
diff --git a/3rdparty/benchmark/src/benchmark_main.cc b/3rdparty/benchmark/src/benchmark_main.cc
new file mode 100644
index 00000000..b3b24783
--- /dev/null
+++ b/3rdparty/benchmark/src/benchmark_main.cc
@@ -0,0 +1,17 @@
+// Copyright 2018 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "benchmark/benchmark.h"
+
+BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/src/benchmark_name.cc b/3rdparty/benchmark/src/benchmark_name.cc
new file mode 100644
index 00000000..2a17ebce
--- /dev/null
+++ b/3rdparty/benchmark/src/benchmark_name.cc
@@ -0,0 +1,58 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <benchmark/benchmark.h>
+
+namespace benchmark {
+
+namespace {
+
+// Compute the total size of a pack of std::strings
+size_t size_impl() { return 0; }
+
+template <typename Head, typename... Tail>
+size_t size_impl(const Head& head, const Tail&... tail) {
+  return head.size() + size_impl(tail...);
+}
+
+// Join a pack of std::strings using a delimiter
+// TODO: use absl::StrJoin
+void join_impl(std::string&, char) {}
+
+template <typename Head, typename... Tail>
+void join_impl(std::string& s, const char delimiter, const Head& head,
+               const Tail&... tail) {
+  if (!s.empty() && !head.empty()) {
+    s += delimiter;
+  }
+
+  s += head;
+
+  join_impl(s, delimiter, tail...);
+}
+
+template <typename... Ts>
+std::string join(char delimiter, const Ts&... ts) {
+  std::string s;
+  s.reserve(sizeof...(Ts) + size_impl(ts...));
+  join_impl(s, delimiter, ts...);
+  return s;
+}
+}  // namespace
+
+std::string BenchmarkName::str() const {
+  return join('/', function_name, args, min_time, iterations, repetitions,
+              time_type, threads);
+}
+}  // namespace benchmark
diff --git a/3rdparty/benchmark/src/benchmark_register.cc b/3rdparty/benchmark/src/benchmark_register.cc
new file mode 100644
index 00000000..61a0c261
--- /dev/null
+++ b/3rdparty/benchmark/src/benchmark_register.cc
@@ -0,0 +1,492 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "benchmark_register.h"
+
+#ifndef BENCHMARK_OS_WINDOWS
+#ifndef BENCHMARK_OS_FUCHSIA
+#include <sys/resource.h>
+#endif
+#include <sys/time.h>
+#include <unistd.h>
+#endif
+
+#include <algorithm>
+#include <atomic>
+#include <cinttypes>
+#include <condition_variable>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <fstream>
+#include <iostream>
+#include <memory>
+#include <numeric>
+#include <sstream>
+#include <thread>
+
+#include "benchmark/benchmark.h"
+#include "benchmark_api_internal.h"
+#include "check.h"
+#include "commandlineflags.h"
+#include "complexity.h"
+#include "internal_macros.h"
+#include "log.h"
+#include "mutex.h"
+#include "re.h"
+#include "statistics.h"
+#include "string_util.h"
+#include "timers.h"
+
+namespace benchmark {
+
+namespace {
+// For non-dense Range, intermediate values are powers of kRangeMultiplier.
+static const int kRangeMultiplier = 8;
+// The size of a benchmark family determines is the number of inputs to repeat
+// the benchmark on. If this is "large" then warn the user during configuration.
+static const size_t kMaxFamilySize = 100;
+}  // end namespace
+
+namespace internal {
+
+//=============================================================================//
+//                         BenchmarkFamilies
+//=============================================================================//
+
+// Class for managing registered benchmarks.  Note that each registered
+// benchmark identifies a family of related benchmarks to run.
+class BenchmarkFamilies {
+ public:
+  static BenchmarkFamilies* GetInstance();
+
+  // Registers a benchmark family and returns the index assigned to it.
+  size_t AddBenchmark(std::unique_ptr<Benchmark> family);
+
+  // Clear all registered benchmark families.
+  void ClearBenchmarks();
+
+  // Extract the list of benchmark instances that match the specified
+  // regular expression.
+  bool FindBenchmarks(std::string re,
+                      std::vector<BenchmarkInstance>* benchmarks,
+                      std::ostream* Err);
+
+ private:
+  BenchmarkFamilies() {}
+
+  std::vector<std::unique_ptr<Benchmark>> families_;
+  Mutex mutex_;
+};
+
+BenchmarkFamilies* BenchmarkFamilies::GetInstance() {
+  static BenchmarkFamilies instance;
+  return &instance;
+}
+
+size_t BenchmarkFamilies::AddBenchmark(std::unique_ptr<Benchmark> family) {
+  MutexLock l(mutex_);
+  size_t index = families_.size();
+  families_.push_back(std::move(family));
+  return index;
+}
+
+void BenchmarkFamilies::ClearBenchmarks() {
+  MutexLock l(mutex_);
+  families_.clear();
+  families_.shrink_to_fit();
+}
+
+bool BenchmarkFamilies::FindBenchmarks(
+    std::string spec, std::vector<BenchmarkInstance>* benchmarks,
+    std::ostream* ErrStream) {
+  BM_CHECK(ErrStream);
+  auto& Err = *ErrStream;
+  // Make regular expression out of command-line flag
+  std::string error_msg;
+  Regex re;
+  bool isNegativeFilter = false;
+  if (spec[0] == '-') {
+    spec.replace(0, 1, "");
+    isNegativeFilter = true;
+  }
+  if (!re.Init(spec, &error_msg)) {
+    Err << "Could not compile benchmark re: " << error_msg << std::endl;
+    return false;
+  }
+
+  // Special list of thread counts to use when none are specified
+  const std::vector<int> one_thread = {1};
+
+  int next_family_index = 0;
+
+  MutexLock l(mutex_);
+  for (std::unique_ptr<Benchmark>& family : families_) {
+    int family_index = next_family_index;
+    int per_family_instance_index = 0;
+
+    // Family was deleted or benchmark doesn't match
+    if (!family) continue;
+
+    if (family->ArgsCnt() == -1) {
+      family->Args({});
+    }
+    const std::vector<int>* thread_counts =
+        (family->thread_counts_.empty()
+             ? &one_thread
+             : &static_cast<const std::vector<int>&>(family->thread_counts_));
+    const size_t family_size = family->args_.size() * thread_counts->size();
+    // The benchmark will be run at least 'family_size' different inputs.
+    // If 'family_size' is very large warn the user.
+    if (family_size > kMaxFamilySize) {
+      Err << "The number of inputs is very large. " << family->name_
+          << " will be repeated at least " << family_size << " times.\n";
+    }
+    // reserve in the special case the regex ".", since we know the final
+    // family size.
+    if (spec == ".") benchmarks->reserve(benchmarks->size() + family_size);
+
+    for (auto const& args : family->args_) {
+      for (int num_threads : *thread_counts) {
+        BenchmarkInstance instance(family.get(), family_index,
+                                   per_family_instance_index, args,
+                                   num_threads);
+
+        const auto full_name = instance.name().str();
+        if ((re.Match(full_name) && !isNegativeFilter) ||
+            (!re.Match(full_name) && isNegativeFilter)) {
+          benchmarks->push_back(std::move(instance));
+
+          ++per_family_instance_index;
+
+          // Only bump the next family index once we've estabilished that
+          // at least one instance of this family will be run.
+          if (next_family_index == family_index) ++next_family_index;
+        }
+      }
+    }
+  }
+  return true;
+}
+
+Benchmark* RegisterBenchmarkInternal(Benchmark* bench) {
+  std::unique_ptr<Benchmark> bench_ptr(bench);
+  BenchmarkFamilies* families = BenchmarkFamilies::GetInstance();
+  families->AddBenchmark(std::move(bench_ptr));
+  return bench;
+}
+
+// FIXME: This function is a hack so that benchmark.cc can access
+// `BenchmarkFamilies`
+bool FindBenchmarksInternal(const std::string& re,
+                            std::vector<BenchmarkInstance>* benchmarks,
+                            std::ostream* Err) {
+  return BenchmarkFamilies::GetInstance()->FindBenchmarks(re, benchmarks, Err);
+}
+
+//=============================================================================//
+//                               Benchmark
+//=============================================================================//
+
+Benchmark::Benchmark(const char* name)
+    : name_(name),
+      aggregation_report_mode_(ARM_Unspecified),
+      time_unit_(kNanosecond),
+      range_multiplier_(kRangeMultiplier),
+      min_time_(0),
+      iterations_(0),
+      repetitions_(0),
+      measure_process_cpu_time_(false),
+      use_real_time_(false),
+      use_manual_time_(false),
+      complexity_(oNone),
+      complexity_lambda_(nullptr),
+      setup_(nullptr),
+      teardown_(nullptr) {
+  ComputeStatistics("mean", StatisticsMean);
+  ComputeStatistics("median", StatisticsMedian);
+  ComputeStatistics("stddev", StatisticsStdDev);
+  ComputeStatistics("cv", StatisticsCV, kPercentage);
+}
+
+Benchmark::~Benchmark() {}
+
+Benchmark* Benchmark::Name(const std::string& name) {
+  SetName(name.c_str());
+  return this;
+}
+
+Benchmark* Benchmark::Arg(int64_t x) {
+  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
+  args_.push_back({x});
+  return this;
+}
+
+Benchmark* Benchmark::Unit(TimeUnit unit) {
+  time_unit_ = unit;
+  return this;
+}
+
+Benchmark* Benchmark::Range(int64_t start, int64_t limit) {
+  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
+  std::vector<int64_t> arglist;
+  AddRange(&arglist, start, limit, range_multiplier_);
+
+  for (int64_t i : arglist) {
+    args_.push_back({i});
+  }
+  return this;
+}
+
+Benchmark* Benchmark::Ranges(
+    const std::vector<std::pair<int64_t, int64_t>>& ranges) {
+  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(ranges.size()));
+  std::vector<std::vector<int64_t>> arglists(ranges.size());
+  for (std::size_t i = 0; i < ranges.size(); i++) {
+    AddRange(&arglists[i], ranges[i].first, ranges[i].second,
+             range_multiplier_);
+  }
+
+  ArgsProduct(arglists);
+
+  return this;
+}
+
+Benchmark* Benchmark::ArgsProduct(
+    const std::vector<std::vector<int64_t>>& arglists) {
+  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(arglists.size()));
+
+  std::vector<std::size_t> indices(arglists.size());
+  const std::size_t total = std::accumulate(
+      std::begin(arglists), std::end(arglists), std::size_t{1},
+      [](const std::size_t res, const std::vector<int64_t>& arglist) {
+        return res * arglist.size();
+      });
+  std::vector<int64_t> args;
+  args.reserve(arglists.size());
+  for (std::size_t i = 0; i < total; i++) {
+    for (std::size_t arg = 0; arg < arglists.size(); arg++) {
+      args.push_back(arglists[arg][indices[arg]]);
+    }
+    args_.push_back(args);
+    args.clear();
+
+    std::size_t arg = 0;
+    do {
+      indices[arg] = (indices[arg] + 1) % arglists[arg].size();
+    } while (indices[arg++] == 0 && arg < arglists.size());
+  }
+
+  return this;
+}
+
+Benchmark* Benchmark::ArgName(const std::string& name) {
+  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
+  arg_names_ = {name};
+  return this;
+}
+
+Benchmark* Benchmark::ArgNames(const std::vector<std::string>& names) {
+  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(names.size()));
+  arg_names_ = names;
+  return this;
+}
+
+Benchmark* Benchmark::DenseRange(int64_t start, int64_t limit, int step) {
+  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
+  BM_CHECK_LE(start, limit);
+  for (int64_t arg = start; arg <= limit; arg += step) {
+    args_.push_back({arg});
+  }
+  return this;
+}
+
+Benchmark* Benchmark::Args(const std::vector<int64_t>& args) {
+  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(args.size()));
+  args_.push_back(args);
+  return this;
+}
+
+Benchmark* Benchmark::Apply(void (*custom_arguments)(Benchmark* benchmark)) {
+  custom_arguments(this);
+  return this;
+}
+
+Benchmark* Benchmark::Setup(void (*setup)(const benchmark::State&)) {
+  BM_CHECK(setup != nullptr);
+  setup_ = setup;
+  return this;
+}
+
+Benchmark* Benchmark::Teardown(void (*teardown)(const benchmark::State&)) {
+  BM_CHECK(teardown != nullptr);
+  teardown_ = teardown;
+  return this;
+}
+
+Benchmark* Benchmark::RangeMultiplier(int multiplier) {
+  BM_CHECK(multiplier > 1);
+  range_multiplier_ = multiplier;
+  return this;
+}
+
+Benchmark* Benchmark::MinTime(double t) {
+  BM_CHECK(t > 0.0);
+  BM_CHECK(iterations_ == 0);
+  min_time_ = t;
+  return this;
+}
+
+Benchmark* Benchmark::Iterations(IterationCount n) {
+  BM_CHECK(n > 0);
+  BM_CHECK(IsZero(min_time_));
+  iterations_ = n;
+  return this;
+}
+
+Benchmark* Benchmark::Repetitions(int n) {
+  BM_CHECK(n > 0);
+  repetitions_ = n;
+  return this;
+}
+
+Benchmark* Benchmark::ReportAggregatesOnly(bool value) {
+  aggregation_report_mode_ = value ? ARM_ReportAggregatesOnly : ARM_Default;
+  return this;
+}
+
+Benchmark* Benchmark::DisplayAggregatesOnly(bool value) {
+  // If we were called, the report mode is no longer 'unspecified', in any case.
+  aggregation_report_mode_ = static_cast<AggregationReportMode>(
+      aggregation_report_mode_ | ARM_Default);
+
+  if (value) {
+    aggregation_report_mode_ = static_cast<AggregationReportMode>(
+        aggregation_report_mode_ | ARM_DisplayReportAggregatesOnly);
+  } else {
+    aggregation_report_mode_ = static_cast<AggregationReportMode>(
+        aggregation_report_mode_ & ~ARM_DisplayReportAggregatesOnly);
+  }
+
+  return this;
+}
+
+Benchmark* Benchmark::MeasureProcessCPUTime() {
+  // Can be used together with UseRealTime() / UseManualTime().
+  measure_process_cpu_time_ = true;
+  return this;
+}
+
+Benchmark* Benchmark::UseRealTime() {
+  BM_CHECK(!use_manual_time_)
+      << "Cannot set UseRealTime and UseManualTime simultaneously.";
+  use_real_time_ = true;
+  return this;
+}
+
+Benchmark* Benchmark::UseManualTime() {
+  BM_CHECK(!use_real_time_)
+      << "Cannot set UseRealTime and UseManualTime simultaneously.";
+  use_manual_time_ = true;
+  return this;
+}
+
+Benchmark* Benchmark::Complexity(BigO complexity) {
+  complexity_ = complexity;
+  return this;
+}
+
+Benchmark* Benchmark::Complexity(BigOFunc* complexity) {
+  complexity_lambda_ = complexity;
+  complexity_ = oLambda;
+  return this;
+}
+
+Benchmark* Benchmark::ComputeStatistics(const std::string& name,
+                                        StatisticsFunc* statistics,
+                                        StatisticUnit unit) {
+  statistics_.emplace_back(name, statistics, unit);
+  return this;
+}
+
+Benchmark* Benchmark::Threads(int t) {
+  BM_CHECK_GT(t, 0);
+  thread_counts_.push_back(t);
+  return this;
+}
+
+Benchmark* Benchmark::ThreadRange(int min_threads, int max_threads) {
+  BM_CHECK_GT(min_threads, 0);
+  BM_CHECK_GE(max_threads, min_threads);
+
+  AddRange(&thread_counts_, min_threads, max_threads, 2);
+  return this;
+}
+
+Benchmark* Benchmark::DenseThreadRange(int min_threads, int max_threads,
+                                       int stride) {
+  BM_CHECK_GT(min_threads, 0);
+  BM_CHECK_GE(max_threads, min_threads);
+  BM_CHECK_GE(stride, 1);
+
+  for (auto i = min_threads; i < max_threads; i += stride) {
+    thread_counts_.push_back(i);
+  }
+  thread_counts_.push_back(max_threads);
+  return this;
+}
+
+Benchmark* Benchmark::ThreadPerCpu() {
+  thread_counts_.push_back(CPUInfo::Get().num_cpus);
+  return this;
+}
+
+void Benchmark::SetName(const char* name) { name_ = name; }
+
+int Benchmark::ArgsCnt() const {
+  if (args_.empty()) {
+    if (arg_names_.empty()) return -1;
+    return static_cast<int>(arg_names_.size());
+  }
+  return static_cast<int>(args_.front().size());
+}
+
+//=============================================================================//
+//                            FunctionBenchmark
+//=============================================================================//
+
+void FunctionBenchmark::Run(State& st) { func_(st); }
+
+}  // end namespace internal
+
+void ClearRegisteredBenchmarks() {
+  internal::BenchmarkFamilies::GetInstance()->ClearBenchmarks();
+}
+
+std::vector<int64_t> CreateRange(int64_t lo, int64_t hi, int multi) {
+  std::vector<int64_t> args;
+  internal::AddRange(&args, lo, hi, multi);
+  return args;
+}
+
+std::vector<int64_t> CreateDenseRange(int64_t start, int64_t limit, int step) {
+  BM_CHECK_LE(start, limit);
+  std::vector<int64_t> args;
+  for (int64_t arg = start; arg <= limit; arg += step) {
+    args.push_back(arg);
+  }
+  return args;
+}
+
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/benchmark_register.h b/3rdparty/benchmark/src/benchmark_register.h
new file mode 100644
index 00000000..d3f4974e
--- /dev/null
+++ b/3rdparty/benchmark/src/benchmark_register.h
@@ -0,0 +1,108 @@
+#ifndef BENCHMARK_REGISTER_H
+#define BENCHMARK_REGISTER_H
+
+#include <limits>
+#include <vector>
+
+#include "check.h"
+
+namespace benchmark {
+namespace internal {
+
+// Append the powers of 'mult' in the closed interval [lo, hi].
+// Returns iterator to the start of the inserted range.
+template <typename T>
+typename std::vector<T>::iterator AddPowers(std::vector<T>* dst, T lo, T hi,
+                                            int mult) {
+  BM_CHECK_GE(lo, 0);
+  BM_CHECK_GE(hi, lo);
+  BM_CHECK_GE(mult, 2);
+
+  const size_t start_offset = dst->size();
+
+  static const T kmax = std::numeric_limits<T>::max();
+
+  // Space out the values in multiples of "mult"
+  for (T i = static_cast<T>(1); i <= hi; i *= mult) {
+    if (i >= lo) {
+      dst->push_back(i);
+    }
+    // Break the loop here since multiplying by
+    // 'mult' would move outside of the range of T
+    if (i > kmax / mult) break;
+  }
+
+  return dst->begin() + start_offset;
+}
+
+template <typename T>
+void AddNegatedPowers(std::vector<T>* dst, T lo, T hi, int mult) {
+  // We negate lo and hi so we require that they cannot be equal to 'min'.
+  BM_CHECK_GT(lo, std::numeric_limits<T>::min());
+  BM_CHECK_GT(hi, std::numeric_limits<T>::min());
+  BM_CHECK_GE(hi, lo);
+  BM_CHECK_LE(hi, 0);
+
+  // Add positive powers, then negate and reverse.
+  // Casts necessary since small integers get promoted
+  // to 'int' when negating.
+  const auto lo_complement = static_cast<T>(-lo);
+  const auto hi_complement = static_cast<T>(-hi);
+
+  const auto it = AddPowers(dst, hi_complement, lo_complement, mult);
+
+  std::for_each(it, dst->end(), [](T& t) { t *= -1; });
+  std::reverse(it, dst->end());
+}
+
+template <typename T>
+void AddRange(std::vector<T>* dst, T lo, T hi, int mult) {
+  static_assert(std::is_integral<T>::value && std::is_signed<T>::value,
+                "Args type must be a signed integer");
+
+  BM_CHECK_GE(hi, lo);
+  BM_CHECK_GE(mult, 2);
+
+  // Add "lo"
+  dst->push_back(lo);
+
+  // Handle lo == hi as a special case, so we then know
+  // lo < hi and so it is safe to add 1 to lo and subtract 1
+  // from hi without falling outside of the range of T.
+  if (lo == hi) return;
+
+  // Ensure that lo_inner <= hi_inner below.
+  if (lo + 1 == hi) {
+    dst->push_back(hi);
+    return;
+  }
+
+  // Add all powers of 'mult' in the range [lo+1, hi-1] (inclusive).
+  const auto lo_inner = static_cast<T>(lo + 1);
+  const auto hi_inner = static_cast<T>(hi - 1);
+
+  // Insert negative values
+  if (lo_inner < 0) {
+    AddNegatedPowers(dst, lo_inner, std::min(hi_inner, T{-1}), mult);
+  }
+
+  // Treat 0 as a special case (see discussion on #762).
+  if (lo < 0 && hi >= 0) {
+    dst->push_back(0);
+  }
+
+  // Insert positive values
+  if (hi_inner > 0) {
+    AddPowers(dst, std::max(lo_inner, T{1}), hi_inner, mult);
+  }
+
+  // Add "hi" (if different from last value).
+  if (hi != dst->back()) {
+    dst->push_back(hi);
+  }
+}
+
+}  // namespace internal
+}  // namespace benchmark
+
+#endif  // BENCHMARK_REGISTER_H
diff --git a/3rdparty/benchmark/src/benchmark_runner.cc b/3rdparty/benchmark/src/benchmark_runner.cc
new file mode 100644
index 00000000..eac807b0
--- /dev/null
+++ b/3rdparty/benchmark/src/benchmark_runner.cc
@@ -0,0 +1,359 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "benchmark_runner.h"
+
+#include "benchmark/benchmark.h"
+#include "benchmark_api_internal.h"
+#include "internal_macros.h"
+
+#ifndef BENCHMARK_OS_WINDOWS
+#ifndef BENCHMARK_OS_FUCHSIA
+#include <sys/resource.h>
+#endif
+#include <sys/time.h>
+#include <unistd.h>
+#endif
+
+#include <algorithm>
+#include <atomic>
+#include <condition_variable>
+#include <cstdio>
+#include <cstdlib>
+#include <fstream>
+#include <iostream>
+#include <memory>
+#include <string>
+#include <thread>
+#include <utility>
+
+#include "check.h"
+#include "colorprint.h"
+#include "commandlineflags.h"
+#include "complexity.h"
+#include "counter.h"
+#include "internal_macros.h"
+#include "log.h"
+#include "mutex.h"
+#include "perf_counters.h"
+#include "re.h"
+#include "statistics.h"
+#include "string_util.h"
+#include "thread_manager.h"
+#include "thread_timer.h"
+
+namespace benchmark {
+
+namespace internal {
+
+MemoryManager* memory_manager = nullptr;
+
+namespace {
+
+static constexpr IterationCount kMaxIterations = 1000000000;
+
+BenchmarkReporter::Run CreateRunReport(
+    const benchmark::internal::BenchmarkInstance& b,
+    const internal::ThreadManager::Result& results,
+    IterationCount memory_iterations,
+    const MemoryManager::Result* memory_result, double seconds,
+    int64_t repetition_index, int64_t repeats) {
+  // Create report about this benchmark run.
+  BenchmarkReporter::Run report;
+
+  report.run_name = b.name();
+  report.family_index = b.family_index();
+  report.per_family_instance_index = b.per_family_instance_index();
+  report.error_occurred = results.has_error_;
+  report.error_message = results.error_message_;
+  report.report_label = results.report_label_;
+  // This is the total iterations across all threads.
+  report.iterations = results.iterations;
+  report.time_unit = b.time_unit();
+  report.threads = b.threads();
+  report.repetition_index = repetition_index;
+  report.repetitions = repeats;
+
+  if (!report.error_occurred) {
+    if (b.use_manual_time()) {
+      report.real_accumulated_time = results.manual_time_used;
+    } else {
+      report.real_accumulated_time = results.real_time_used;
+    }
+    report.cpu_accumulated_time = results.cpu_time_used;
+    report.complexity_n = results.complexity_n;
+    report.complexity = b.complexity();
+    report.complexity_lambda = b.complexity_lambda();
+    report.statistics = &b.statistics();
+    report.counters = results.counters;
+
+    if (memory_iterations > 0) {
+      assert(memory_result != nullptr);
+      report.memory_result = memory_result;
+      report.allocs_per_iter =
+          memory_iterations ? static_cast<double>(memory_result->num_allocs) /
+                                  memory_iterations
+                            : 0;
+    }
+
+    internal::Finish(&report.counters, results.iterations, seconds,
+                     b.threads());
+  }
+  return report;
+}
+
+// Execute one thread of benchmark b for the specified number of iterations.
+// Adds the stats collected for the thread into manager->results.
+void RunInThread(const BenchmarkInstance* b, IterationCount iters,
+                 int thread_id, ThreadManager* manager,
+                 PerfCountersMeasurement* perf_counters_measurement) {
+  internal::ThreadTimer timer(
+      b->measure_process_cpu_time()
+          ? internal::ThreadTimer::CreateProcessCpuTime()
+          : internal::ThreadTimer::Create());
+  State st =
+      b->Run(iters, thread_id, &timer, manager, perf_counters_measurement);
+  BM_CHECK(st.error_occurred() || st.iterations() >= st.max_iterations)
+      << "Benchmark returned before State::KeepRunning() returned false!";
+  {
+    MutexLock l(manager->GetBenchmarkMutex());
+    internal::ThreadManager::Result& results = manager->results;
+    results.iterations += st.iterations();
+    results.cpu_time_used += timer.cpu_time_used();
+    results.real_time_used += timer.real_time_used();
+    results.manual_time_used += timer.manual_time_used();
+    results.complexity_n += st.complexity_length_n();
+    internal::Increment(&results.counters, st.counters);
+  }
+  manager->NotifyThreadComplete();
+}
+
+}  // end namespace
+
+BenchmarkRunner::BenchmarkRunner(
+    const benchmark::internal::BenchmarkInstance& b_,
+    BenchmarkReporter::PerFamilyRunReports* reports_for_family_)
+    : b(b_),
+      reports_for_family(reports_for_family_),
+      min_time(!IsZero(b.min_time()) ? b.min_time() : FLAGS_benchmark_min_time),
+      repeats(b.repetitions() != 0 ? b.repetitions()
+                                   : FLAGS_benchmark_repetitions),
+      has_explicit_iteration_count(b.iterations() != 0),
+      pool(b.threads() - 1),
+      iters(has_explicit_iteration_count ? b.iterations() : 1),
+      perf_counters_measurement(
+          PerfCounters::Create(StrSplit(FLAGS_benchmark_perf_counters, ','))),
+      perf_counters_measurement_ptr(perf_counters_measurement.IsValid()
+                                        ? &perf_counters_measurement
+                                        : nullptr) {
+  run_results.display_report_aggregates_only =
+      (FLAGS_benchmark_report_aggregates_only ||
+       FLAGS_benchmark_display_aggregates_only);
+  run_results.file_report_aggregates_only =
+      FLAGS_benchmark_report_aggregates_only;
+  if (b.aggregation_report_mode() != internal::ARM_Unspecified) {
+    run_results.display_report_aggregates_only =
+        (b.aggregation_report_mode() &
+         internal::ARM_DisplayReportAggregatesOnly);
+    run_results.file_report_aggregates_only =
+        (b.aggregation_report_mode() & internal::ARM_FileReportAggregatesOnly);
+    BM_CHECK(FLAGS_benchmark_perf_counters.empty() ||
+             perf_counters_measurement.IsValid())
+        << "Perf counters were requested but could not be set up.";
+  }
+}
+
+BenchmarkRunner::IterationResults BenchmarkRunner::DoNIterations() {
+  BM_VLOG(2) << "Running " << b.name().str() << " for " << iters << "\n";
+
+  std::unique_ptr<internal::ThreadManager> manager;
+  manager.reset(new internal::ThreadManager(b.threads()));
+
+  // Run all but one thread in separate threads
+  for (std::size_t ti = 0; ti < pool.size(); ++ti) {
+    pool[ti] = std::thread(&RunInThread, &b, iters, static_cast<int>(ti + 1),
+                           manager.get(), perf_counters_measurement_ptr);
+  }
+  // And run one thread here directly.
+  // (If we were asked to run just one thread, we don't create new threads.)
+  // Yes, we need to do this here *after* we start the separate threads.
+  RunInThread(&b, iters, 0, manager.get(), perf_counters_measurement_ptr);
+
+  // The main thread has finished. Now let's wait for the other threads.
+  manager->WaitForAllThreads();
+  for (std::thread& thread : pool) thread.join();
+
+  IterationResults i;
+  // Acquire the measurements/counters from the manager, UNDER THE LOCK!
+  {
+    MutexLock l(manager->GetBenchmarkMutex());
+    i.results = manager->results;
+  }
+
+  // And get rid of the manager.
+  manager.reset();
+
+  // Adjust real/manual time stats since they were reported per thread.
+  i.results.real_time_used /= b.threads();
+  i.results.manual_time_used /= b.threads();
+  // If we were measuring whole-process CPU usage, adjust the CPU time too.
+  if (b.measure_process_cpu_time()) i.results.cpu_time_used /= b.threads();
+
+  BM_VLOG(2) << "Ran in " << i.results.cpu_time_used << "/"
+             << i.results.real_time_used << "\n";
+
+  // By using KeepRunningBatch a benchmark can iterate more times than
+  // requested, so take the iteration count from i.results.
+  i.iters = i.results.iterations / b.threads();
+
+  // Base decisions off of real time if requested by this benchmark.
+  i.seconds = i.results.cpu_time_used;
+  if (b.use_manual_time()) {
+    i.seconds = i.results.manual_time_used;
+  } else if (b.use_real_time()) {
+    i.seconds = i.results.real_time_used;
+  }
+
+  return i;
+}
+
+IterationCount BenchmarkRunner::PredictNumItersNeeded(
+    const IterationResults& i) const {
+  // See how much iterations should be increased by.
+  // Note: Avoid division by zero with max(seconds, 1ns).
+  double multiplier = min_time * 1.4 / std::max(i.seconds, 1e-9);
+  // If our last run was at least 10% of FLAGS_benchmark_min_time then we
+  // use the multiplier directly.
+  // Otherwise we use at most 10 times expansion.
+  // NOTE: When the last run was at least 10% of the min time the max
+  // expansion should be 14x.
+  bool is_significant = (i.seconds / min_time) > 0.1;
+  multiplier = is_significant ? multiplier : 10.0;
+
+  // So what seems to be the sufficiently-large iteration count? Round up.
+  const IterationCount max_next_iters = static_cast<IterationCount>(
+      std::lround(std::max(multiplier * static_cast<double>(i.iters),
+                           static_cast<double>(i.iters) + 1.0)));
+  // But we do have *some* sanity limits though..
+  const IterationCount next_iters = std::min(max_next_iters, kMaxIterations);
+
+  BM_VLOG(3) << "Next iters: " << next_iters << ", " << multiplier << "\n";
+  return next_iters;  // round up before conversion to integer.
+}
+
+bool BenchmarkRunner::ShouldReportIterationResults(
+    const IterationResults& i) const {
+  // Determine if this run should be reported;
+  // Either it has run for a sufficient amount of time
+  // or because an error was reported.
+  return i.results.has_error_ ||
+         i.iters >= kMaxIterations ||  // Too many iterations already.
+         i.seconds >= min_time ||      // The elapsed time is large enough.
+         // CPU time is specified but the elapsed real time greatly exceeds
+         // the minimum time.
+         // Note that user provided timers are except from this sanity check.
+         ((i.results.real_time_used >= 5 * min_time) && !b.use_manual_time());
+}
+
+void BenchmarkRunner::DoOneRepetition() {
+  assert(HasRepeatsRemaining() && "Already done all repetitions?");
+
+  const bool is_the_first_repetition = num_repetitions_done == 0;
+  IterationResults i;
+
+  // We *may* be gradually increasing the length (iteration count)
+  // of the benchmark until we decide the results are significant.
+  // And once we do, we report those last results and exit.
+  // Please do note that the if there are repetitions, the iteration count
+  // is *only* calculated for the *first* repetition, and other repetitions
+  // simply use that precomputed iteration count.
+  for (;;) {
+    b.Setup();
+    i = DoNIterations();
+    b.Teardown();
+
+    // Do we consider the results to be significant?
+    // If we are doing repetitions, and the first repetition was already done,
+    // it has calculated the correct iteration time, so we have run that very
+    // iteration count just now. No need to calculate anything. Just report.
+    // Else, the normal rules apply.
+    const bool results_are_significant = !is_the_first_repetition ||
+                                         has_explicit_iteration_count ||
+                                         ShouldReportIterationResults(i);
+
+    if (results_are_significant) break;  // Good, let's report them!
+
+    // Nope, bad iteration. Let's re-estimate the hopefully-sufficient
+    // iteration count, and run the benchmark again...
+
+    iters = PredictNumItersNeeded(i);
+    assert(iters > i.iters &&
+           "if we did more iterations than we want to do the next time, "
+           "then we should have accepted the current iteration run.");
+  }
+
+  // Oh, one last thing, we need to also produce the 'memory measurements'..
+  MemoryManager::Result* memory_result = nullptr;
+  IterationCount memory_iterations = 0;
+  if (memory_manager != nullptr) {
+    // TODO(vyng): Consider making BenchmarkReporter::Run::memory_result an
+    // optional so we don't have to own the Result here.
+    // Can't do it now due to cxx03.
+    memory_results.push_back(MemoryManager::Result());
+    memory_result = &memory_results.back();
+    // Only run a few iterations to reduce the impact of one-time
+    // allocations in benchmarks that are not properly managed.
+    memory_iterations = std::min<IterationCount>(16, iters);
+    memory_manager->Start();
+    std::unique_ptr<internal::ThreadManager> manager;
+    manager.reset(new internal::ThreadManager(1));
+    b.Setup();
+    RunInThread(&b, memory_iterations, 0, manager.get(),
+                perf_counters_measurement_ptr);
+    manager->WaitForAllThreads();
+    manager.reset();
+    b.Teardown();
+
+    BENCHMARK_DISABLE_DEPRECATED_WARNING
+    memory_manager->Stop(memory_result);
+    BENCHMARK_RESTORE_DEPRECATED_WARNING
+  }
+
+  // Ok, now actually report.
+  BenchmarkReporter::Run report =
+      CreateRunReport(b, i.results, memory_iterations, memory_result, i.seconds,
+                      num_repetitions_done, repeats);
+
+  if (reports_for_family) {
+    ++reports_for_family->num_runs_done;
+    if (!report.error_occurred) reports_for_family->Runs.push_back(report);
+  }
+
+  run_results.non_aggregates.push_back(report);
+
+  ++num_repetitions_done;
+}
+
+RunResults&& BenchmarkRunner::GetResults() {
+  assert(!HasRepeatsRemaining() && "Did not run all repetitions yet?");
+
+  // Calculate additional statistics over the repetitions of this instance.
+  run_results.aggregates_only = ComputeStats(run_results.non_aggregates);
+
+  return std::move(run_results);
+}
+
+}  // end namespace internal
+
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/benchmark_runner.h b/3rdparty/benchmark/src/benchmark_runner.h
new file mode 100644
index 00000000..752eefdc
--- /dev/null
+++ b/3rdparty/benchmark/src/benchmark_runner.h
@@ -0,0 +1,104 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef BENCHMARK_RUNNER_H_
+#define BENCHMARK_RUNNER_H_
+
+#include <thread>
+#include <vector>
+
+#include "benchmark_api_internal.h"
+#include "internal_macros.h"
+#include "perf_counters.h"
+#include "thread_manager.h"
+
+namespace benchmark {
+
+BM_DECLARE_double(benchmark_min_time);
+BM_DECLARE_int32(benchmark_repetitions);
+BM_DECLARE_bool(benchmark_report_aggregates_only);
+BM_DECLARE_bool(benchmark_display_aggregates_only);
+BM_DECLARE_string(benchmark_perf_counters);
+
+namespace internal {
+
+extern MemoryManager* memory_manager;
+
+struct RunResults {
+  std::vector<BenchmarkReporter::Run> non_aggregates;
+  std::vector<BenchmarkReporter::Run> aggregates_only;
+
+  bool display_report_aggregates_only = false;
+  bool file_report_aggregates_only = false;
+};
+
+class BenchmarkRunner {
+ public:
+  BenchmarkRunner(const benchmark::internal::BenchmarkInstance& b_,
+                  BenchmarkReporter::PerFamilyRunReports* reports_for_family);
+
+  int GetNumRepeats() const { return repeats; }
+
+  bool HasRepeatsRemaining() const {
+    return GetNumRepeats() != num_repetitions_done;
+  }
+
+  void DoOneRepetition();
+
+  RunResults&& GetResults();
+
+  BenchmarkReporter::PerFamilyRunReports* GetReportsForFamily() const {
+    return reports_for_family;
+  }
+
+ private:
+  RunResults run_results;
+
+  const benchmark::internal::BenchmarkInstance& b;
+  BenchmarkReporter::PerFamilyRunReports* reports_for_family;
+
+  const double min_time;
+  const int repeats;
+  const bool has_explicit_iteration_count;
+
+  int num_repetitions_done = 0;
+
+  std::vector<std::thread> pool;
+
+  std::vector<MemoryManager::Result> memory_results;
+
+  IterationCount iters;  // preserved between repetitions!
+  // So only the first repetition has to find/calculate it,
+  // the other repetitions will just use that precomputed iteration count.
+
+  PerfCountersMeasurement perf_counters_measurement;
+  PerfCountersMeasurement* const perf_counters_measurement_ptr;
+
+  struct IterationResults {
+    internal::ThreadManager::Result results;
+    IterationCount iters;
+    double seconds;
+  };
+  IterationResults DoNIterations();
+
+  IterationCount PredictNumItersNeeded(const IterationResults& i) const;
+
+  bool ShouldReportIterationResults(const IterationResults& i) const;
+};
+
+}  // namespace internal
+
+}  // end namespace benchmark
+
+#endif  // BENCHMARK_RUNNER_H_
diff --git a/3rdparty/benchmark/src/check.h b/3rdparty/benchmark/src/check.h
new file mode 100644
index 00000000..90c7bbfa
--- /dev/null
+++ b/3rdparty/benchmark/src/check.h
@@ -0,0 +1,90 @@
+#ifndef CHECK_H_
+#define CHECK_H_
+
+#include <cmath>
+#include <cstdlib>
+#include <ostream>
+
+#include "internal_macros.h"
+#include "log.h"
+
+namespace benchmark {
+namespace internal {
+
+typedef void(AbortHandlerT)();
+
+inline AbortHandlerT*& GetAbortHandler() {
+  static AbortHandlerT* handler = &std::abort;
+  return handler;
+}
+
+BENCHMARK_NORETURN inline void CallAbortHandler() {
+  GetAbortHandler()();
+  std::abort();  // fallback to enforce noreturn
+}
+
+// CheckHandler is the class constructed by failing BM_CHECK macros.
+// CheckHandler will log information about the failures and abort when it is
+// destructed.
+class CheckHandler {
+ public:
+  CheckHandler(const char* check, const char* file, const char* func, int line)
+      : log_(GetErrorLogInstance()) {
+    log_ << file << ":" << line << ": " << func << ": Check `" << check
+         << "' failed. ";
+  }
+
+  LogType& GetLog() { return log_; }
+
+#if defined(COMPILER_MSVC)
+#pragma warning(push)
+#pragma warning(disable : 4722)
+#endif
+  BENCHMARK_NORETURN ~CheckHandler() BENCHMARK_NOEXCEPT_OP(false) {
+    log_ << std::endl;
+    CallAbortHandler();
+  }
+#if defined(COMPILER_MSVC)
+#pragma warning(pop)
+#endif
+
+  CheckHandler& operator=(const CheckHandler&) = delete;
+  CheckHandler(const CheckHandler&) = delete;
+  CheckHandler() = delete;
+
+ private:
+  LogType& log_;
+};
+
+}  // end namespace internal
+}  // end namespace benchmark
+
+// The BM_CHECK macro returns a std::ostream object that can have extra
+// information written to it.
+#ifndef NDEBUG
+#define BM_CHECK(b)                                                          \
+  (b ? ::benchmark::internal::GetNullLogInstance()                           \
+     : ::benchmark::internal::CheckHandler(#b, __FILE__, __func__, __LINE__) \
+           .GetLog())
+#else
+#define BM_CHECK(b) ::benchmark::internal::GetNullLogInstance()
+#endif
+
+// clang-format off
+// preserve whitespacing between operators for alignment
+#define BM_CHECK_EQ(a, b) BM_CHECK((a) == (b))
+#define BM_CHECK_NE(a, b) BM_CHECK((a) != (b))
+#define BM_CHECK_GE(a, b) BM_CHECK((a) >= (b))
+#define BM_CHECK_LE(a, b) BM_CHECK((a) <= (b))
+#define BM_CHECK_GT(a, b) BM_CHECK((a) > (b))
+#define BM_CHECK_LT(a, b) BM_CHECK((a) < (b))
+
+#define BM_CHECK_FLOAT_EQ(a, b, eps) BM_CHECK(std::fabs((a) - (b)) <  (eps))
+#define BM_CHECK_FLOAT_NE(a, b, eps) BM_CHECK(std::fabs((a) - (b)) >= (eps))
+#define BM_CHECK_FLOAT_GE(a, b, eps) BM_CHECK((a) - (b) > -(eps))
+#define BM_CHECK_FLOAT_LE(a, b, eps) BM_CHECK((b) - (a) > -(eps))
+#define BM_CHECK_FLOAT_GT(a, b, eps) BM_CHECK((a) - (b) >  (eps))
+#define BM_CHECK_FLOAT_LT(a, b, eps) BM_CHECK((b) - (a) >  (eps))
+//clang-format on
+
+#endif  // CHECK_H_
diff --git a/3rdparty/benchmark/src/colorprint.cc b/3rdparty/benchmark/src/colorprint.cc
new file mode 100644
index 00000000..1a000a06
--- /dev/null
+++ b/3rdparty/benchmark/src/colorprint.cc
@@ -0,0 +1,188 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "colorprint.h"
+
+#include <cstdarg>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <memory>
+#include <string>
+
+#include "check.h"
+#include "internal_macros.h"
+
+#ifdef BENCHMARK_OS_WINDOWS
+#include <io.h>
+#include <windows.h>
+#else
+#include <unistd.h>
+#endif  // BENCHMARK_OS_WINDOWS
+
+namespace benchmark {
+namespace {
+#ifdef BENCHMARK_OS_WINDOWS
+typedef WORD PlatformColorCode;
+#else
+typedef const char* PlatformColorCode;
+#endif
+
+PlatformColorCode GetPlatformColorCode(LogColor color) {
+#ifdef BENCHMARK_OS_WINDOWS
+  switch (color) {
+    case COLOR_RED:
+      return FOREGROUND_RED;
+    case COLOR_GREEN:
+      return FOREGROUND_GREEN;
+    case COLOR_YELLOW:
+      return FOREGROUND_RED | FOREGROUND_GREEN;
+    case COLOR_BLUE:
+      return FOREGROUND_BLUE;
+    case COLOR_MAGENTA:
+      return FOREGROUND_BLUE | FOREGROUND_RED;
+    case COLOR_CYAN:
+      return FOREGROUND_BLUE | FOREGROUND_GREEN;
+    case COLOR_WHITE:  // fall through to default
+    default:
+      return 0;
+  }
+#else
+  switch (color) {
+    case COLOR_RED:
+      return "1";
+    case COLOR_GREEN:
+      return "2";
+    case COLOR_YELLOW:
+      return "3";
+    case COLOR_BLUE:
+      return "4";
+    case COLOR_MAGENTA:
+      return "5";
+    case COLOR_CYAN:
+      return "6";
+    case COLOR_WHITE:
+      return "7";
+    default:
+      return nullptr;
+  };
+#endif
+}
+
+}  // end namespace
+
+std::string FormatString(const char* msg, va_list args) {
+  // we might need a second shot at this, so pre-emptivly make a copy
+  va_list args_cp;
+  va_copy(args_cp, args);
+
+  std::size_t size = 256;
+  char local_buff[256];
+  auto ret = vsnprintf(local_buff, size, msg, args_cp);
+
+  va_end(args_cp);
+
+  // currently there is no error handling for failure, so this is hack.
+  BM_CHECK(ret >= 0);
+
+  if (ret == 0)  // handle empty expansion
+    return {};
+  else if (static_cast<size_t>(ret) < size)
+    return local_buff;
+  else {
+    // we did not provide a long enough buffer on our first attempt.
+    size = static_cast<size_t>(ret) + 1;  // + 1 for the null byte
+    std::unique_ptr<char[]> buff(new char[size]);
+    ret = vsnprintf(buff.get(), size, msg, args);
+    BM_CHECK(ret > 0 && (static_cast<size_t>(ret)) < size);
+    return buff.get();
+  }
+}
+
+std::string FormatString(const char* msg, ...) {
+  va_list args;
+  va_start(args, msg);
+  auto tmp = FormatString(msg, args);
+  va_end(args);
+  return tmp;
+}
+
+void ColorPrintf(std::ostream& out, LogColor color, const char* fmt, ...) {
+  va_list args;
+  va_start(args, fmt);
+  ColorPrintf(out, color, fmt, args);
+  va_end(args);
+}
+
+void ColorPrintf(std::ostream& out, LogColor color, const char* fmt,
+                 va_list args) {
+#ifdef BENCHMARK_OS_WINDOWS
+  ((void)out);  // suppress unused warning
+
+  const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
+
+  // Gets the current text color.
+  CONSOLE_SCREEN_BUFFER_INFO buffer_info;
+  GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
+  const WORD old_color_attrs = buffer_info.wAttributes;
+
+  // We need to flush the stream buffers into the console before each
+  // SetConsoleTextAttribute call lest it affect the text that is already
+  // printed but has not yet reached the console.
+  fflush(stdout);
+  SetConsoleTextAttribute(stdout_handle,
+                          GetPlatformColorCode(color) | FOREGROUND_INTENSITY);
+  vprintf(fmt, args);
+
+  fflush(stdout);
+  // Restores the text color.
+  SetConsoleTextAttribute(stdout_handle, old_color_attrs);
+#else
+  const char* color_code = GetPlatformColorCode(color);
+  if (color_code) out << FormatString("\033[0;3%sm", color_code);
+  out << FormatString(fmt, args) << "\033[m";
+#endif
+}
+
+bool IsColorTerminal() {
+#if BENCHMARK_OS_WINDOWS
+  // On Windows the TERM variable is usually not set, but the
+  // console there does support colors.
+  return 0 != _isatty(_fileno(stdout));
+#else
+  // On non-Windows platforms, we rely on the TERM variable. This list of
+  // supported TERM values is copied from Google Test:
+  // <https://github.com/google/googletest/blob/master/googletest/src/gtest.cc#L2925>.
+  const char* const SUPPORTED_TERM_VALUES[] = {
+      "xterm",         "xterm-color",     "xterm-256color",
+      "screen",        "screen-256color", "tmux",
+      "tmux-256color", "rxvt-unicode",    "rxvt-unicode-256color",
+      "linux",         "cygwin",
+  };
+
+  const char* const term = getenv("TERM");
+
+  bool term_supports_color = false;
+  for (const char* candidate : SUPPORTED_TERM_VALUES) {
+    if (term && 0 == strcmp(term, candidate)) {
+      term_supports_color = true;
+      break;
+    }
+  }
+
+  return 0 != isatty(fileno(stdout)) && term_supports_color;
+#endif  // BENCHMARK_OS_WINDOWS
+}
+
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/colorprint.h b/3rdparty/benchmark/src/colorprint.h
new file mode 100644
index 00000000..9f6fab9b
--- /dev/null
+++ b/3rdparty/benchmark/src/colorprint.h
@@ -0,0 +1,33 @@
+#ifndef BENCHMARK_COLORPRINT_H_
+#define BENCHMARK_COLORPRINT_H_
+
+#include <cstdarg>
+#include <iostream>
+#include <string>
+
+namespace benchmark {
+enum LogColor {
+  COLOR_DEFAULT,
+  COLOR_RED,
+  COLOR_GREEN,
+  COLOR_YELLOW,
+  COLOR_BLUE,
+  COLOR_MAGENTA,
+  COLOR_CYAN,
+  COLOR_WHITE
+};
+
+std::string FormatString(const char* msg, va_list args);
+std::string FormatString(const char* msg, ...);
+
+void ColorPrintf(std::ostream& out, LogColor color, const char* fmt,
+                 va_list args);
+void ColorPrintf(std::ostream& out, LogColor color, const char* fmt, ...);
+
+// Returns true if stdout appears to be a terminal that supports colored
+// output, false otherwise.
+bool IsColorTerminal();
+
+}  // end namespace benchmark
+
+#endif  // BENCHMARK_COLORPRINT_H_
diff --git a/3rdparty/benchmark/src/commandlineflags.cc b/3rdparty/benchmark/src/commandlineflags.cc
new file mode 100644
index 00000000..9615e351
--- /dev/null
+++ b/3rdparty/benchmark/src/commandlineflags.cc
@@ -0,0 +1,285 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "commandlineflags.h"
+
+#include <algorithm>
+#include <cctype>
+#include <cstdlib>
+#include <cstring>
+#include <iostream>
+#include <limits>
+#include <map>
+#include <utility>
+
+#include "../src/string_util.h"
+
+namespace benchmark {
+namespace {
+
+// Parses 'str' for a 32-bit signed integer.  If successful, writes
+// the result to *value and returns true; otherwise leaves *value
+// unchanged and returns false.
+bool ParseInt32(const std::string& src_text, const char* str, int32_t* value) {
+  // Parses the environment variable as a decimal integer.
+  char* end = nullptr;
+  const long long_value = strtol(str, &end, 10);  // NOLINT
+
+  // Has strtol() consumed all characters in the string?
+  if (*end != '\0') {
+    // No - an invalid character was encountered.
+    std::cerr << src_text << " is expected to be a 32-bit integer, "
+              << "but actually has value \"" << str << "\".\n";
+    return false;
+  }
+
+  // Is the parsed value in the range of an Int32?
+  const int32_t result = static_cast<int32_t>(long_value);
+  if (long_value == std::numeric_limits<long>::max() ||
+      long_value == std::numeric_limits<long>::min() ||
+      // The parsed value overflows as a long.  (strtol() returns
+      // LONG_MAX or LONG_MIN when the input overflows.)
+      result != long_value
+      // The parsed value overflows as an Int32.
+  ) {
+    std::cerr << src_text << " is expected to be a 32-bit integer, "
+              << "but actually has value \"" << str << "\", "
+              << "which overflows.\n";
+    return false;
+  }
+
+  *value = result;
+  return true;
+}
+
+// Parses 'str' for a double.  If successful, writes the result to *value and
+// returns true; otherwise leaves *value unchanged and returns false.
+bool ParseDouble(const std::string& src_text, const char* str, double* value) {
+  // Parses the environment variable as a decimal integer.
+  char* end = nullptr;
+  const double double_value = strtod(str, &end);  // NOLINT
+
+  // Has strtol() consumed all characters in the string?
+  if (*end != '\0') {
+    // No - an invalid character was encountered.
+    std::cerr << src_text << " is expected to be a double, "
+              << "but actually has value \"" << str << "\".\n";
+    return false;
+  }
+
+  *value = double_value;
+  return true;
+}
+
+// Parses 'str' into KV pairs. If successful, writes the result to *value and
+// returns true; otherwise leaves *value unchanged and returns false.
+bool ParseKvPairs(const std::string& src_text, const char* str,
+                  std::map<std::string, std::string>* value) {
+  std::map<std::string, std::string> kvs;
+  for (const auto& kvpair : StrSplit(str, ',')) {
+    const auto kv = StrSplit(kvpair, '=');
+    if (kv.size() != 2) {
+      std::cerr << src_text << " is expected to be a comma-separated list of "
+                << "<key>=<value> strings, but actually has value \"" << str
+                << "\".\n";
+      return false;
+    }
+    if (!kvs.emplace(kv[0], kv[1]).second) {
+      std::cerr << src_text << " is expected to contain unique keys but key \""
+                << kv[0] << "\" was repeated.\n";
+      return false;
+    }
+  }
+
+  *value = kvs;
+  return true;
+}
+
+// Returns the name of the environment variable corresponding to the
+// given flag.  For example, FlagToEnvVar("foo") will return
+// "BENCHMARK_FOO" in the open-source version.
+static std::string FlagToEnvVar(const char* flag) {
+  const std::string flag_str(flag);
+
+  std::string env_var;
+  for (size_t i = 0; i != flag_str.length(); ++i)
+    env_var += static_cast<char>(::toupper(flag_str.c_str()[i]));
+
+  return env_var;
+}
+
+}  // namespace
+
+bool BoolFromEnv(const char* flag, bool default_val) {
+  const std::string env_var = FlagToEnvVar(flag);
+  const char* const value_str = getenv(env_var.c_str());
+  return value_str == nullptr ? default_val : IsTruthyFlagValue(value_str);
+}
+
+int32_t Int32FromEnv(const char* flag, int32_t default_val) {
+  const std::string env_var = FlagToEnvVar(flag);
+  const char* const value_str = getenv(env_var.c_str());
+  int32_t value = default_val;
+  if (value_str == nullptr ||
+      !ParseInt32(std::string("Environment variable ") + env_var, value_str,
+                  &value)) {
+    return default_val;
+  }
+  return value;
+}
+
+double DoubleFromEnv(const char* flag, double default_val) {
+  const std::string env_var = FlagToEnvVar(flag);
+  const char* const value_str = getenv(env_var.c_str());
+  double value = default_val;
+  if (value_str == nullptr ||
+      !ParseDouble(std::string("Environment variable ") + env_var, value_str,
+                   &value)) {
+    return default_val;
+  }
+  return value;
+}
+
+const char* StringFromEnv(const char* flag, const char* default_val) {
+  const std::string env_var = FlagToEnvVar(flag);
+  const char* const value = getenv(env_var.c_str());
+  return value == nullptr ? default_val : value;
+}
+
+std::map<std::string, std::string> KvPairsFromEnv(
+    const char* flag, std::map<std::string, std::string> default_val) {
+  const std::string env_var = FlagToEnvVar(flag);
+  const char* const value_str = getenv(env_var.c_str());
+
+  if (value_str == nullptr) return default_val;
+
+  std::map<std::string, std::string> value;
+  if (!ParseKvPairs("Environment variable " + env_var, value_str, &value)) {
+    return default_val;
+  }
+  return value;
+}
+
+// Parses a string as a command line flag.  The string should have
+// the format "--flag=value".  When def_optional is true, the "=value"
+// part can be omitted.
+//
+// Returns the value of the flag, or nullptr if the parsing failed.
+const char* ParseFlagValue(const char* str, const char* flag,
+                           bool def_optional) {
+  // str and flag must not be nullptr.
+  if (str == nullptr || flag == nullptr) return nullptr;
+
+  // The flag must start with "--".
+  const std::string flag_str = std::string("--") + std::string(flag);
+  const size_t flag_len = flag_str.length();
+  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
+
+  // Skips the flag name.
+  const char* flag_end = str + flag_len;
+
+  // When def_optional is true, it's OK to not have a "=value" part.
+  if (def_optional && (flag_end[0] == '\0')) return flag_end;
+
+  // If def_optional is true and there are more characters after the
+  // flag name, or if def_optional is false, there must be a '=' after
+  // the flag name.
+  if (flag_end[0] != '=') return nullptr;
+
+  // Returns the string after "=".
+  return flag_end + 1;
+}
+
+bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
+  // Gets the value of the flag as a string.
+  const char* const value_str = ParseFlagValue(str, flag, true);
+
+  // Aborts if the parsing failed.
+  if (value_str == nullptr) return false;
+
+  // Converts the string value to a bool.
+  *value = IsTruthyFlagValue(value_str);
+  return true;
+}
+
+bool ParseInt32Flag(const char* str, const char* flag, int32_t* value) {
+  // Gets the value of the flag as a string.
+  const char* const value_str = ParseFlagValue(str, flag, false);
+
+  // Aborts if the parsing failed.
+  if (value_str == nullptr) return false;
+
+  // Sets *value to the value of the flag.
+  return ParseInt32(std::string("The value of flag --") + flag, value_str,
+                    value);
+}
+
+bool ParseDoubleFlag(const char* str, const char* flag, double* value) {
+  // Gets the value of the flag as a string.
+  const char* const value_str = ParseFlagValue(str, flag, false);
+
+  // Aborts if the parsing failed.
+  if (value_str == nullptr) return false;
+
+  // Sets *value to the value of the flag.
+  return ParseDouble(std::string("The value of flag --") + flag, value_str,
+                     value);
+}
+
+bool ParseStringFlag(const char* str, const char* flag, std::string* value) {
+  // Gets the value of the flag as a string.
+  const char* const value_str = ParseFlagValue(str, flag, false);
+
+  // Aborts if the parsing failed.
+  if (value_str == nullptr) return false;
+
+  *value = value_str;
+  return true;
+}
+
+bool ParseKeyValueFlag(const char* str, const char* flag,
+                       std::map<std::string, std::string>* value) {
+  const char* const value_str = ParseFlagValue(str, flag, false);
+
+  if (value_str == nullptr) return false;
+
+  for (const auto& kvpair : StrSplit(value_str, ',')) {
+    const auto kv = StrSplit(kvpair, '=');
+    if (kv.size() != 2) return false;
+    value->emplace(kv[0], kv[1]);
+  }
+
+  return true;
+}
+
+bool IsFlag(const char* str, const char* flag) {
+  return (ParseFlagValue(str, flag, true) != nullptr);
+}
+
+bool IsTruthyFlagValue(const std::string& value) {
+  if (value.size() == 1) {
+    char v = value[0];
+    return isalnum(v) &&
+           !(v == '0' || v == 'f' || v == 'F' || v == 'n' || v == 'N');
+  } else if (!value.empty()) {
+    std::string value_lower(value);
+    std::transform(value_lower.begin(), value_lower.end(), value_lower.begin(),
+                   [](char c) { return static_cast<char>(::tolower(c)); });
+    return !(value_lower == "false" || value_lower == "no" ||
+             value_lower == "off");
+  } else
+    return true;
+}
+
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/commandlineflags.h b/3rdparty/benchmark/src/commandlineflags.h
new file mode 100644
index 00000000..5baaf117
--- /dev/null
+++ b/3rdparty/benchmark/src/commandlineflags.h
@@ -0,0 +1,116 @@
+#ifndef BENCHMARK_COMMANDLINEFLAGS_H_
+#define BENCHMARK_COMMANDLINEFLAGS_H_
+
+#include <cstdint>
+#include <map>
+#include <string>
+
+// Macro for referencing flags.
+#define FLAG(name) FLAGS_##name
+
+// Macros for declaring flags.
+#define BM_DECLARE_bool(name) extern bool FLAG(name)
+#define BM_DECLARE_int32(name) extern int32_t FLAG(name)
+#define BM_DECLARE_double(name) extern double FLAG(name)
+#define BM_DECLARE_string(name) extern std::string FLAG(name)
+#define BM_DECLARE_kvpairs(name) \
+  extern std::map<std::string, std::string> FLAG(name)
+
+// Macros for defining flags.
+#define BM_DEFINE_bool(name, default_val) \
+  bool FLAG(name) = benchmark::BoolFromEnv(#name, default_val)
+#define BM_DEFINE_int32(name, default_val) \
+  int32_t FLAG(name) = benchmark::Int32FromEnv(#name, default_val)
+#define BM_DEFINE_double(name, default_val) \
+  double FLAG(name) = benchmark::DoubleFromEnv(#name, default_val)
+#define BM_DEFINE_string(name, default_val) \
+  std::string FLAG(name) = benchmark::StringFromEnv(#name, default_val)
+#define BM_DEFINE_kvpairs(name, default_val)      \
+  std::map<std::string, std::string> FLAG(name) = \
+      benchmark::KvPairsFromEnv(#name, default_val)
+
+namespace benchmark {
+
+// Parses a bool from the environment variable corresponding to the given flag.
+//
+// If the variable exists, returns IsTruthyFlagValue() value;  if not,
+// returns the given default value.
+bool BoolFromEnv(const char* flag, bool default_val);
+
+// Parses an Int32 from the environment variable corresponding to the given
+// flag.
+//
+// If the variable exists, returns ParseInt32() value;  if not, returns
+// the given default value.
+int32_t Int32FromEnv(const char* flag, int32_t default_val);
+
+// Parses an Double from the environment variable corresponding to the given
+// flag.
+//
+// If the variable exists, returns ParseDouble();  if not, returns
+// the given default value.
+double DoubleFromEnv(const char* flag, double default_val);
+
+// Parses a string from the environment variable corresponding to the given
+// flag.
+//
+// If variable exists, returns its value;  if not, returns
+// the given default value.
+const char* StringFromEnv(const char* flag, const char* default_val);
+
+// Parses a set of kvpairs from the environment variable corresponding to the
+// given flag.
+//
+// If variable exists, returns its value;  if not, returns
+// the given default value.
+std::map<std::string, std::string> KvPairsFromEnv(
+    const char* flag, std::map<std::string, std::string> default_val);
+
+// Parses a string for a bool flag, in the form of either
+// "--flag=value" or "--flag".
+//
+// In the former case, the value is taken as true if it passes IsTruthyValue().
+//
+// In the latter case, the value is taken as true.
+//
+// On success, stores the value of the flag in *value, and returns
+// true.  On failure, returns false without changing *value.
+bool ParseBoolFlag(const char* str, const char* flag, bool* value);
+
+// Parses a string for an Int32 flag, in the form of "--flag=value".
+//
+// On success, stores the value of the flag in *value, and returns
+// true.  On failure, returns false without changing *value.
+bool ParseInt32Flag(const char* str, const char* flag, int32_t* value);
+
+// Parses a string for a Double flag, in the form of "--flag=value".
+//
+// On success, stores the value of the flag in *value, and returns
+// true.  On failure, returns false without changing *value.
+bool ParseDoubleFlag(const char* str, const char* flag, double* value);
+
+// Parses a string for a string flag, in the form of "--flag=value".
+//
+// On success, stores the value of the flag in *value, and returns
+// true.  On failure, returns false without changing *value.
+bool ParseStringFlag(const char* str, const char* flag, std::string* value);
+
+// Parses a string for a kvpairs flag in the form "--flag=key=value,key=value"
+//
+// On success, stores the value of the flag in *value and returns true. On
+// failure returns false, though *value may have been mutated.
+bool ParseKeyValueFlag(const char* str, const char* flag,
+                       std::map<std::string, std::string>* value);
+
+// Returns true if the string matches the flag.
+bool IsFlag(const char* str, const char* flag);
+
+// Returns true unless value starts with one of: '0', 'f', 'F', 'n' or 'N', or
+// some non-alphanumeric character. Also returns false if the value matches
+// one of 'no', 'false', 'off' (case-insensitive). As a special case, also
+// returns true if value is the empty string.
+bool IsTruthyFlagValue(const std::string& value);
+
+}  // end namespace benchmark
+
+#endif  // BENCHMARK_COMMANDLINEFLAGS_H_
diff --git a/3rdparty/benchmark/src/complexity.cc b/3rdparty/benchmark/src/complexity.cc
new file mode 100644
index 00000000..825c5739
--- /dev/null
+++ b/3rdparty/benchmark/src/complexity.cc
@@ -0,0 +1,244 @@
+// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Source project : https://github.com/ismaelJimenez/cpp.leastsq
+// Adapted to be used with google benchmark
+
+#include "complexity.h"
+
+#include <algorithm>
+#include <cmath>
+
+#include "benchmark/benchmark.h"
+#include "check.h"
+
+namespace benchmark {
+
+// Internal function to calculate the different scalability forms
+BigOFunc* FittingCurve(BigO complexity) {
+  static const double kLog2E = 1.44269504088896340736;
+  switch (complexity) {
+    case oN:
+      return [](IterationCount n) -> double { return static_cast<double>(n); };
+    case oNSquared:
+      return [](IterationCount n) -> double { return std::pow(n, 2); };
+    case oNCubed:
+      return [](IterationCount n) -> double { return std::pow(n, 3); };
+    case oLogN:
+      /* Note: can't use log2 because Android's GNU STL lacks it */
+      return
+          [](IterationCount n) { return kLog2E * log(static_cast<double>(n)); };
+    case oNLogN:
+      /* Note: can't use log2 because Android's GNU STL lacks it */
+      return [](IterationCount n) {
+        return kLog2E * n * log(static_cast<double>(n));
+      };
+    case o1:
+    default:
+      return [](IterationCount) { return 1.0; };
+  }
+}
+
+// Function to return an string for the calculated complexity
+std::string GetBigOString(BigO complexity) {
+  switch (complexity) {
+    case oN:
+      return "N";
+    case oNSquared:
+      return "N^2";
+    case oNCubed:
+      return "N^3";
+    case oLogN:
+      return "lgN";
+    case oNLogN:
+      return "NlgN";
+    case o1:
+      return "(1)";
+    default:
+      return "f(N)";
+  }
+}
+
+// Find the coefficient for the high-order term in the running time, by
+// minimizing the sum of squares of relative error, for the fitting curve
+// given by the lambda expression.
+//   - n             : Vector containing the size of the benchmark tests.
+//   - time          : Vector containing the times for the benchmark tests.
+//   - fitting_curve : lambda expression (e.g. [](int64_t n) {return n; };).
+
+// For a deeper explanation on the algorithm logic, please refer to
+// https://en.wikipedia.org/wiki/Least_squares#Least_squares,_regression_analysis_and_statistics
+
+LeastSq MinimalLeastSq(const std::vector<int64_t>& n,
+                       const std::vector<double>& time,
+                       BigOFunc* fitting_curve) {
+  double sigma_gn_squared = 0.0;
+  double sigma_time = 0.0;
+  double sigma_time_gn = 0.0;
+
+  // Calculate least square fitting parameter
+  for (size_t i = 0; i < n.size(); ++i) {
+    double gn_i = fitting_curve(n[i]);
+    sigma_gn_squared += gn_i * gn_i;
+    sigma_time += time[i];
+    sigma_time_gn += time[i] * gn_i;
+  }
+
+  LeastSq result;
+  result.complexity = oLambda;
+
+  // Calculate complexity.
+  result.coef = sigma_time_gn / sigma_gn_squared;
+
+  // Calculate RMS
+  double rms = 0.0;
+  for (size_t i = 0; i < n.size(); ++i) {
+    double fit = result.coef * fitting_curve(n[i]);
+    rms += pow((time[i] - fit), 2);
+  }
+
+  // Normalized RMS by the mean of the observed values
+  double mean = sigma_time / n.size();
+  result.rms = sqrt(rms / n.size()) / mean;
+
+  return result;
+}
+
+// Find the coefficient for the high-order term in the running time, by
+// minimizing the sum of squares of relative error.
+//   - n          : Vector containing the size of the benchmark tests.
+//   - time       : Vector containing the times for the benchmark tests.
+//   - complexity : If different than oAuto, the fitting curve will stick to
+//                  this one. If it is oAuto, it will be calculated the best
+//                  fitting curve.
+LeastSq MinimalLeastSq(const std::vector<int64_t>& n,
+                       const std::vector<double>& time, const BigO complexity) {
+  BM_CHECK_EQ(n.size(), time.size());
+  BM_CHECK_GE(n.size(), 2);  // Do not compute fitting curve is less than two
+                             // benchmark runs are given
+  BM_CHECK_NE(complexity, oNone);
+
+  LeastSq best_fit;
+
+  if (complexity == oAuto) {
+    std::vector<BigO> fit_curves = {oLogN, oN, oNLogN, oNSquared, oNCubed};
+
+    // Take o1 as default best fitting curve
+    best_fit = MinimalLeastSq(n, time, FittingCurve(o1));
+    best_fit.complexity = o1;
+
+    // Compute all possible fitting curves and stick to the best one
+    for (const auto& fit : fit_curves) {
+      LeastSq current_fit = MinimalLeastSq(n, time, FittingCurve(fit));
+      if (current_fit.rms < best_fit.rms) {
+        best_fit = current_fit;
+        best_fit.complexity = fit;
+      }
+    }
+  } else {
+    best_fit = MinimalLeastSq(n, time, FittingCurve(complexity));
+    best_fit.complexity = complexity;
+  }
+
+  return best_fit;
+}
+
+std::vector<BenchmarkReporter::Run> ComputeBigO(
+    const std::vector<BenchmarkReporter::Run>& reports) {
+  typedef BenchmarkReporter::Run Run;
+  std::vector<Run> results;
+
+  if (reports.size() < 2) return results;
+
+  // Accumulators.
+  std::vector<int64_t> n;
+  std::vector<double> real_time;
+  std::vector<double> cpu_time;
+
+  // Populate the accumulators.
+  for (const Run& run : reports) {
+    BM_CHECK_GT(run.complexity_n, 0)
+        << "Did you forget to call SetComplexityN?";
+    n.push_back(run.complexity_n);
+    real_time.push_back(run.real_accumulated_time / run.iterations);
+    cpu_time.push_back(run.cpu_accumulated_time / run.iterations);
+  }
+
+  LeastSq result_cpu;
+  LeastSq result_real;
+
+  if (reports[0].complexity == oLambda) {
+    result_cpu = MinimalLeastSq(n, cpu_time, reports[0].complexity_lambda);
+    result_real = MinimalLeastSq(n, real_time, reports[0].complexity_lambda);
+  } else {
+    result_cpu = MinimalLeastSq(n, cpu_time, reports[0].complexity);
+    result_real = MinimalLeastSq(n, real_time, result_cpu.complexity);
+  }
+
+  // Drop the 'args' when reporting complexity.
+  auto run_name = reports[0].run_name;
+  run_name.args.clear();
+
+  // Get the data from the accumulator to BenchmarkReporter::Run's.
+  Run big_o;
+  big_o.run_name = run_name;
+  big_o.family_index = reports[0].family_index;
+  big_o.per_family_instance_index = reports[0].per_family_instance_index;
+  big_o.run_type = BenchmarkReporter::Run::RT_Aggregate;
+  big_o.repetitions = reports[0].repetitions;
+  big_o.repetition_index = Run::no_repetition_index;
+  big_o.threads = reports[0].threads;
+  big_o.aggregate_name = "BigO";
+  big_o.aggregate_unit = StatisticUnit::kTime;
+  big_o.report_label = reports[0].report_label;
+  big_o.iterations = 0;
+  big_o.real_accumulated_time = result_real.coef;
+  big_o.cpu_accumulated_time = result_cpu.coef;
+  big_o.report_big_o = true;
+  big_o.complexity = result_cpu.complexity;
+
+  // All the time results are reported after being multiplied by the
+  // time unit multiplier. But since RMS is a relative quantity it
+  // should not be multiplied at all. So, here, we _divide_ it by the
+  // multiplier so that when it is multiplied later the result is the
+  // correct one.
+  double multiplier = GetTimeUnitMultiplier(reports[0].time_unit);
+
+  // Only add label to mean/stddev if it is same for all runs
+  Run rms;
+  rms.run_name = run_name;
+  rms.family_index = reports[0].family_index;
+  rms.per_family_instance_index = reports[0].per_family_instance_index;
+  rms.run_type = BenchmarkReporter::Run::RT_Aggregate;
+  rms.aggregate_name = "RMS";
+  rms.aggregate_unit = StatisticUnit::kPercentage;
+  rms.report_label = big_o.report_label;
+  rms.iterations = 0;
+  rms.repetition_index = Run::no_repetition_index;
+  rms.repetitions = reports[0].repetitions;
+  rms.threads = reports[0].threads;
+  rms.real_accumulated_time = result_real.rms / multiplier;
+  rms.cpu_accumulated_time = result_cpu.rms / multiplier;
+  rms.report_rms = true;
+  rms.complexity = result_cpu.complexity;
+  // don't forget to keep the time unit, or we won't be able to
+  // recover the correct value.
+  rms.time_unit = reports[0].time_unit;
+
+  results.push_back(big_o);
+  results.push_back(rms);
+  return results;
+}
+
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/complexity.h b/3rdparty/benchmark/src/complexity.h
new file mode 100644
index 00000000..df29b48d
--- /dev/null
+++ b/3rdparty/benchmark/src/complexity.h
@@ -0,0 +1,55 @@
+// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Source project : https://github.com/ismaelJimenez/cpp.leastsq
+// Adapted to be used with google benchmark
+
+#ifndef COMPLEXITY_H_
+#define COMPLEXITY_H_
+
+#include <string>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+
+namespace benchmark {
+
+// Return a vector containing the bigO and RMS information for the specified
+// list of reports. If 'reports.size() < 2' an empty vector is returned.
+std::vector<BenchmarkReporter::Run> ComputeBigO(
+    const std::vector<BenchmarkReporter::Run>& reports);
+
+// This data structure will contain the result returned by MinimalLeastSq
+//   - coef        : Estimated coeficient for the high-order term as
+//                   interpolated from data.
+//   - rms         : Normalized Root Mean Squared Error.
+//   - complexity  : Scalability form (e.g. oN, oNLogN). In case a scalability
+//                   form has been provided to MinimalLeastSq this will return
+//                   the same value. In case BigO::oAuto has been selected, this
+//                   parameter will return the best fitting curve detected.
+
+struct LeastSq {
+  LeastSq() : coef(0.0), rms(0.0), complexity(oNone) {}
+
+  double coef;
+  double rms;
+  BigO complexity;
+};
+
+// Function to return an string for the calculated complexity
+std::string GetBigOString(BigO complexity);
+
+}  // end namespace benchmark
+
+#endif  // COMPLEXITY_H_
diff --git a/3rdparty/benchmark/src/console_reporter.cc b/3rdparty/benchmark/src/console_reporter.cc
new file mode 100644
index 00000000..04cc0b74
--- /dev/null
+++ b/3rdparty/benchmark/src/console_reporter.cc
@@ -0,0 +1,190 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <algorithm>
+#include <cstdint>
+#include <cstdio>
+#include <cstring>
+#include <iostream>
+#include <string>
+#include <tuple>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+#include "check.h"
+#include "colorprint.h"
+#include "commandlineflags.h"
+#include "complexity.h"
+#include "counter.h"
+#include "internal_macros.h"
+#include "string_util.h"
+#include "timers.h"
+
+namespace benchmark {
+
+bool ConsoleReporter::ReportContext(const Context& context) {
+  name_field_width_ = context.name_field_width;
+  printed_header_ = false;
+  prev_counters_.clear();
+
+  PrintBasicContext(&GetErrorStream(), context);
+
+#ifdef BENCHMARK_OS_WINDOWS
+  if ((output_options_ & OO_Color) && &std::cout != &GetOutputStream()) {
+    GetErrorStream()
+        << "Color printing is only supported for stdout on windows."
+           " Disabling color printing\n";
+    output_options_ = static_cast<OutputOptions>(output_options_ & ~OO_Color);
+  }
+#endif
+
+  return true;
+}
+
+void ConsoleReporter::PrintHeader(const Run& run) {
+  std::string str =
+      FormatString("%-*s %13s %15s %12s", static_cast<int>(name_field_width_),
+                   "Benchmark", "Time", "CPU", "Iterations");
+  if (!run.counters.empty()) {
+    if (output_options_ & OO_Tabular) {
+      for (auto const& c : run.counters) {
+        str += FormatString(" %10s", c.first.c_str());
+      }
+    } else {
+      str += " UserCounters...";
+    }
+  }
+  std::string line = std::string(str.length(), '-');
+  GetOutputStream() << line << "\n" << str << "\n" << line << "\n";
+}
+
+void ConsoleReporter::ReportRuns(const std::vector<Run>& reports) {
+  for (const auto& run : reports) {
+    // print the header:
+    // --- if none was printed yet
+    bool print_header = !printed_header_;
+    // --- or if the format is tabular and this run
+    //     has different fields from the prev header
+    print_header |= (output_options_ & OO_Tabular) &&
+                    (!internal::SameNames(run.counters, prev_counters_));
+    if (print_header) {
+      printed_header_ = true;
+      prev_counters_ = run.counters;
+      PrintHeader(run);
+    }
+    // As an alternative to printing the headers like this, we could sort
+    // the benchmarks by header and then print. But this would require
+    // waiting for the full results before printing, or printing twice.
+    PrintRunData(run);
+  }
+}
+
+static void IgnoreColorPrint(std::ostream& out, LogColor, const char* fmt,
+                             ...) {
+  va_list args;
+  va_start(args, fmt);
+  out << FormatString(fmt, args);
+  va_end(args);
+}
+
+static std::string FormatTime(double time) {
+  // Align decimal places...
+  if (time < 1.0) {
+    return FormatString("%10.3f", time);
+  }
+  if (time < 10.0) {
+    return FormatString("%10.2f", time);
+  }
+  if (time < 100.0) {
+    return FormatString("%10.1f", time);
+  }
+  return FormatString("%10.0f", time);
+}
+
+void ConsoleReporter::PrintRunData(const Run& result) {
+  typedef void(PrinterFn)(std::ostream&, LogColor, const char*, ...);
+  auto& Out = GetOutputStream();
+  PrinterFn* printer = (output_options_ & OO_Color)
+                           ? static_cast<PrinterFn*>(ColorPrintf)
+                           : IgnoreColorPrint;
+  auto name_color =
+      (result.report_big_o || result.report_rms) ? COLOR_BLUE : COLOR_GREEN;
+  printer(Out, name_color, "%-*s ", name_field_width_,
+          result.benchmark_name().c_str());
+
+  if (result.error_occurred) {
+    printer(Out, COLOR_RED, "ERROR OCCURRED: \'%s\'",
+            result.error_message.c_str());
+    printer(Out, COLOR_DEFAULT, "\n");
+    return;
+  }
+
+  const double real_time = result.GetAdjustedRealTime();
+  const double cpu_time = result.GetAdjustedCPUTime();
+  const std::string real_time_str = FormatTime(real_time);
+  const std::string cpu_time_str = FormatTime(cpu_time);
+
+  if (result.report_big_o) {
+    std::string big_o = GetBigOString(result.complexity);
+    printer(Out, COLOR_YELLOW, "%10.2f %-4s %10.2f %-4s ", real_time,
+            big_o.c_str(), cpu_time, big_o.c_str());
+  } else if (result.report_rms) {
+    printer(Out, COLOR_YELLOW, "%10.0f %-4s %10.0f %-4s ", real_time * 100, "%",
+            cpu_time * 100, "%");
+  } else if (result.run_type != Run::RT_Aggregate ||
+             result.aggregate_unit == StatisticUnit::kTime) {
+    const char* timeLabel = GetTimeUnitString(result.time_unit);
+    printer(Out, COLOR_YELLOW, "%s %-4s %s %-4s ", real_time_str.c_str(),
+            timeLabel, cpu_time_str.c_str(), timeLabel);
+  } else {
+    assert(result.aggregate_unit == StatisticUnit::kPercentage);
+    printer(Out, COLOR_YELLOW, "%10.2f %-4s %10.2f %-4s ",
+            (100. * result.real_accumulated_time), "%",
+            (100. * result.cpu_accumulated_time), "%");
+  }
+
+  if (!result.report_big_o && !result.report_rms) {
+    printer(Out, COLOR_CYAN, "%10lld", result.iterations);
+  }
+
+  for (auto& c : result.counters) {
+    const std::size_t cNameLen =
+        std::max(std::string::size_type(10), c.first.length());
+    std::string s;
+    const char* unit = "";
+    if (result.run_type == Run::RT_Aggregate &&
+        result.aggregate_unit == StatisticUnit::kPercentage) {
+      s = StrFormat("%.2f", 100. * c.second.value);
+      unit = "%";
+    } else {
+      s = HumanReadableNumber(c.second.value, c.second.oneK);
+      if (c.second.flags & Counter::kIsRate)
+        unit = (c.second.flags & Counter::kInvert) ? "s" : "/s";
+    }
+    if (output_options_ & OO_Tabular) {
+      printer(Out, COLOR_DEFAULT, " %*s%s", cNameLen - strlen(unit), s.c_str(),
+              unit);
+    } else {
+      printer(Out, COLOR_DEFAULT, " %s=%s%s", c.first.c_str(), s.c_str(), unit);
+    }
+  }
+
+  if (!result.report_label.empty()) {
+    printer(Out, COLOR_DEFAULT, " %s", result.report_label.c_str());
+  }
+
+  printer(Out, COLOR_DEFAULT, "\n");
+}
+
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/counter.cc b/3rdparty/benchmark/src/counter.cc
new file mode 100644
index 00000000..cf5b78ee
--- /dev/null
+++ b/3rdparty/benchmark/src/counter.cc
@@ -0,0 +1,80 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "counter.h"
+
+namespace benchmark {
+namespace internal {
+
+double Finish(Counter const& c, IterationCount iterations, double cpu_time,
+              double num_threads) {
+  double v = c.value;
+  if (c.flags & Counter::kIsRate) {
+    v /= cpu_time;
+  }
+  if (c.flags & Counter::kAvgThreads) {
+    v /= num_threads;
+  }
+  if (c.flags & Counter::kIsIterationInvariant) {
+    v *= iterations;
+  }
+  if (c.flags & Counter::kAvgIterations) {
+    v /= iterations;
+  }
+
+  if (c.flags & Counter::kInvert) {  // Invert is *always* last.
+    v = 1.0 / v;
+  }
+  return v;
+}
+
+void Finish(UserCounters* l, IterationCount iterations, double cpu_time,
+            double num_threads) {
+  for (auto& c : *l) {
+    c.second.value = Finish(c.second, iterations, cpu_time, num_threads);
+  }
+}
+
+void Increment(UserCounters* l, UserCounters const& r) {
+  // add counters present in both or just in *l
+  for (auto& c : *l) {
+    auto it = r.find(c.first);
+    if (it != r.end()) {
+      c.second.value = c.second + it->second;
+    }
+  }
+  // add counters present in r, but not in *l
+  for (auto const& tc : r) {
+    auto it = l->find(tc.first);
+    if (it == l->end()) {
+      (*l)[tc.first] = tc.second;
+    }
+  }
+}
+
+bool SameNames(UserCounters const& l, UserCounters const& r) {
+  if (&l == &r) return true;
+  if (l.size() != r.size()) {
+    return false;
+  }
+  for (auto const& c : l) {
+    if (r.find(c.first) == r.end()) {
+      return false;
+    }
+  }
+  return true;
+}
+
+}  // end namespace internal
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/counter.h b/3rdparty/benchmark/src/counter.h
new file mode 100644
index 00000000..1f5a58e3
--- /dev/null
+++ b/3rdparty/benchmark/src/counter.h
@@ -0,0 +1,32 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef BENCHMARK_COUNTER_H_
+#define BENCHMARK_COUNTER_H_
+
+#include "benchmark/benchmark.h"
+
+namespace benchmark {
+
+// these counter-related functions are hidden to reduce API surface.
+namespace internal {
+void Finish(UserCounters* l, IterationCount iterations, double time,
+            double num_threads);
+void Increment(UserCounters* l, UserCounters const& r);
+bool SameNames(UserCounters const& l, UserCounters const& r);
+}  // end namespace internal
+
+}  // end namespace benchmark
+
+#endif  // BENCHMARK_COUNTER_H_
diff --git a/3rdparty/benchmark/src/csv_reporter.cc b/3rdparty/benchmark/src/csv_reporter.cc
new file mode 100644
index 00000000..1c5e9fa6
--- /dev/null
+++ b/3rdparty/benchmark/src/csv_reporter.cc
@@ -0,0 +1,158 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <algorithm>
+#include <cstdint>
+#include <iostream>
+#include <string>
+#include <tuple>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+#include "check.h"
+#include "complexity.h"
+#include "string_util.h"
+#include "timers.h"
+
+// File format reference: http://edoceo.com/utilitas/csv-file-format.
+
+namespace benchmark {
+
+namespace {
+std::vector<std::string> elements = {
+    "name",           "iterations",       "real_time",        "cpu_time",
+    "time_unit",      "bytes_per_second", "items_per_second", "label",
+    "error_occurred", "error_message"};
+}  // namespace
+
+std::string CsvEscape(const std::string& s) {
+  std::string tmp;
+  tmp.reserve(s.size() + 2);
+  for (char c : s) {
+    switch (c) {
+      case '"':
+        tmp += "\"\"";
+        break;
+      default:
+        tmp += c;
+        break;
+    }
+  }
+  return '"' + tmp + '"';
+}
+
+bool CSVReporter::ReportContext(const Context& context) {
+  PrintBasicContext(&GetErrorStream(), context);
+  return true;
+}
+
+void CSVReporter::ReportRuns(const std::vector<Run>& reports) {
+  std::ostream& Out = GetOutputStream();
+
+  if (!printed_header_) {
+    // save the names of all the user counters
+    for (const auto& run : reports) {
+      for (const auto& cnt : run.counters) {
+        if (cnt.first == "bytes_per_second" || cnt.first == "items_per_second")
+          continue;
+        user_counter_names_.insert(cnt.first);
+      }
+    }
+
+    // print the header
+    for (auto B = elements.begin(); B != elements.end();) {
+      Out << *B++;
+      if (B != elements.end()) Out << ",";
+    }
+    for (auto B = user_counter_names_.begin();
+         B != user_counter_names_.end();) {
+      Out << ",\"" << *B++ << "\"";
+    }
+    Out << "\n";
+
+    printed_header_ = true;
+  } else {
+    // check that all the current counters are saved in the name set
+    for (const auto& run : reports) {
+      for (const auto& cnt : run.counters) {
+        if (cnt.first == "bytes_per_second" || cnt.first == "items_per_second")
+          continue;
+        BM_CHECK(user_counter_names_.find(cnt.first) !=
+                 user_counter_names_.end())
+            << "All counters must be present in each run. "
+            << "Counter named \"" << cnt.first
+            << "\" was not in a run after being added to the header";
+      }
+    }
+  }
+
+  // print results for each run
+  for (const auto& run : reports) {
+    PrintRunData(run);
+  }
+}
+
+void CSVReporter::PrintRunData(const Run& run) {
+  std::ostream& Out = GetOutputStream();
+  Out << CsvEscape(run.benchmark_name()) << ",";
+  if (run.error_occurred) {
+    Out << std::string(elements.size() - 3, ',');
+    Out << "true,";
+    Out << CsvEscape(run.error_message) << "\n";
+    return;
+  }
+
+  // Do not print iteration on bigO and RMS report
+  if (!run.report_big_o && !run.report_rms) {
+    Out << run.iterations;
+  }
+  Out << ",";
+
+  Out << run.GetAdjustedRealTime() << ",";
+  Out << run.GetAdjustedCPUTime() << ",";
+
+  // Do not print timeLabel on bigO and RMS report
+  if (run.report_big_o) {
+    Out << GetBigOString(run.complexity);
+  } else if (!run.report_rms) {
+    Out << GetTimeUnitString(run.time_unit);
+  }
+  Out << ",";
+
+  if (run.counters.find("bytes_per_second") != run.counters.end()) {
+    Out << run.counters.at("bytes_per_second");
+  }
+  Out << ",";
+  if (run.counters.find("items_per_second") != run.counters.end()) {
+    Out << run.counters.at("items_per_second");
+  }
+  Out << ",";
+  if (!run.report_label.empty()) {
+    Out << CsvEscape(run.report_label);
+  }
+  Out << ",,";  // for error_occurred and error_message
+
+  // Print user counters
+  for (const auto& ucn : user_counter_names_) {
+    auto it = run.counters.find(ucn);
+    if (it == run.counters.end()) {
+      Out << ",";
+    } else {
+      Out << "," << it->second;
+    }
+  }
+  Out << '\n';
+}
+
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/cycleclock.h b/3rdparty/benchmark/src/cycleclock.h
new file mode 100644
index 00000000..d65d32a3
--- /dev/null
+++ b/3rdparty/benchmark/src/cycleclock.h
@@ -0,0 +1,225 @@
+// ----------------------------------------------------------------------
+// CycleClock
+//    A CycleClock tells you the current time in Cycles.  The "time"
+//    is actually time since power-on.  This is like time() but doesn't
+//    involve a system call and is much more precise.
+//
+// NOTE: Not all cpu/platform/kernel combinations guarantee that this
+// clock increments at a constant rate or is synchronized across all logical
+// cpus in a system.
+//
+// If you need the above guarantees, please consider using a different
+// API. There are efforts to provide an interface which provides a millisecond
+// granularity and implemented as a memory read. A memory read is generally
+// cheaper than the CycleClock for many architectures.
+//
+// Also, in some out of order CPU implementations, the CycleClock is not
+// serializing. So if you're trying to count at cycles granularity, your
+// data might be inaccurate due to out of order instruction execution.
+// ----------------------------------------------------------------------
+
+#ifndef BENCHMARK_CYCLECLOCK_H_
+#define BENCHMARK_CYCLECLOCK_H_
+
+#include <cstdint>
+
+#include "benchmark/benchmark.h"
+#include "internal_macros.h"
+
+#if defined(BENCHMARK_OS_MACOSX)
+#include <mach/mach_time.h>
+#endif
+// For MSVC, we want to use '_asm rdtsc' when possible (since it works
+// with even ancient MSVC compilers), and when not possible the
+// __rdtsc intrinsic, declared in <intrin.h>.  Unfortunately, in some
+// environments, <windows.h> and <intrin.h> have conflicting
+// declarations of some other intrinsics, breaking compilation.
+// Therefore, we simply declare __rdtsc ourselves. See also
+// http://connect.microsoft.com/VisualStudio/feedback/details/262047
+#if defined(COMPILER_MSVC) && !defined(_M_IX86) && !defined(_M_ARM64)
+extern "C" uint64_t __rdtsc();
+#pragma intrinsic(__rdtsc)
+#endif
+
+#if !defined(BENCHMARK_OS_WINDOWS) || defined(BENCHMARK_OS_MINGW)
+#include <sys/time.h>
+#include <time.h>
+#endif
+
+#ifdef BENCHMARK_OS_EMSCRIPTEN
+#include <emscripten.h>
+#endif
+
+namespace benchmark {
+// NOTE: only i386 and x86_64 have been well tested.
+// PPC, sparc, alpha, and ia64 are based on
+//    http://peter.kuscsik.com/wordpress/?p=14
+// with modifications by m3b.  See also
+//    https://setisvn.ssl.berkeley.edu/svn/lib/fftw-3.0.1/kernel/cycle.h
+namespace cycleclock {
+// This should return the number of cycles since power-on.  Thread-safe.
+inline BENCHMARK_ALWAYS_INLINE int64_t Now() {
+#if defined(BENCHMARK_OS_MACOSX)
+  // this goes at the top because we need ALL Macs, regardless of
+  // architecture, to return the number of "mach time units" that
+  // have passed since startup.  See sysinfo.cc where
+  // InitializeSystemInfo() sets the supposed cpu clock frequency of
+  // macs to the number of mach time units per second, not actual
+  // CPU clock frequency (which can change in the face of CPU
+  // frequency scaling).  Also note that when the Mac sleeps, this
+  // counter pauses; it does not continue counting, nor does it
+  // reset to zero.
+  return mach_absolute_time();
+#elif defined(BENCHMARK_OS_EMSCRIPTEN)
+  // this goes above x86-specific code because old versions of Emscripten
+  // define __x86_64__, although they have nothing to do with it.
+  return static_cast<int64_t>(emscripten_get_now() * 1e+6);
+#elif defined(__i386__)
+  int64_t ret;
+  __asm__ volatile("rdtsc" : "=A"(ret));
+  return ret;
+#elif defined(__x86_64__) || defined(__amd64__)
+  uint64_t low, high;
+  __asm__ volatile("rdtsc" : "=a"(low), "=d"(high));
+  return (high << 32) | low;
+#elif defined(__powerpc__) || defined(__ppc__)
+  // This returns a time-base, which is not always precisely a cycle-count.
+#if defined(__powerpc64__) || defined(__ppc64__)
+  int64_t tb;
+  asm volatile("mfspr %0, 268" : "=r"(tb));
+  return tb;
+#else
+  uint32_t tbl, tbu0, tbu1;
+  asm volatile(
+      "mftbu %0\n"
+      "mftb %1\n"
+      "mftbu %2"
+      : "=r"(tbu0), "=r"(tbl), "=r"(tbu1));
+  tbl &= -static_cast<int32_t>(tbu0 == tbu1);
+  // high 32 bits in tbu1; low 32 bits in tbl  (tbu0 is no longer needed)
+  return (static_cast<uint64_t>(tbu1) << 32) | tbl;
+#endif
+#elif defined(__sparc__)
+  int64_t tick;
+  asm(".byte 0x83, 0x41, 0x00, 0x00");
+  asm("mov   %%g1, %0" : "=r"(tick));
+  return tick;
+#elif defined(__ia64__)
+  int64_t itc;
+  asm("mov %0 = ar.itc" : "=r"(itc));
+  return itc;
+#elif defined(COMPILER_MSVC) && defined(_M_IX86)
+  // Older MSVC compilers (like 7.x) don't seem to support the
+  // __rdtsc intrinsic properly, so I prefer to use _asm instead
+  // when I know it will work.  Otherwise, I'll use __rdtsc and hope
+  // the code is being compiled with a non-ancient compiler.
+  _asm rdtsc
+#elif defined(COMPILER_MSVC) && defined(_M_ARM64)
+  // See // https://docs.microsoft.com/en-us/cpp/intrinsics/arm64-intrinsics
+  // and https://reviews.llvm.org/D53115
+  int64_t virtual_timer_value;
+  virtual_timer_value = _ReadStatusReg(ARM64_CNTVCT);
+  return virtual_timer_value;
+#elif defined(COMPILER_MSVC)
+  return __rdtsc();
+#elif defined(BENCHMARK_OS_NACL)
+  // Native Client validator on x86/x86-64 allows RDTSC instructions,
+  // and this case is handled above. Native Client validator on ARM
+  // rejects MRC instructions (used in the ARM-specific sequence below),
+  // so we handle it here. Portable Native Client compiles to
+  // architecture-agnostic bytecode, which doesn't provide any
+  // cycle counter access mnemonics.
+
+  // Native Client does not provide any API to access cycle counter.
+  // Use clock_gettime(CLOCK_MONOTONIC, ...) instead of gettimeofday
+  // because is provides nanosecond resolution (which is noticable at
+  // least for PNaCl modules running on x86 Mac & Linux).
+  // Initialize to always return 0 if clock_gettime fails.
+  struct timespec ts = {0, 0};
+  clock_gettime(CLOCK_MONOTONIC, &ts);
+  return static_cast<int64_t>(ts.tv_sec) * 1000000000 + ts.tv_nsec;
+#elif defined(__aarch64__)
+  // System timer of ARMv8 runs at a different frequency than the CPU's.
+  // The frequency is fixed, typically in the range 1-50MHz.  It can be
+  // read at CNTFRQ special register.  We assume the OS has set up
+  // the virtual timer properly.
+  int64_t virtual_timer_value;
+  asm volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer_value));
+  return virtual_timer_value;
+#elif defined(__ARM_ARCH)
+  // V6 is the earliest arch that has a standard cyclecount
+  // Native Client validator doesn't allow MRC instructions.
+#if (__ARM_ARCH >= 6)
+  uint32_t pmccntr;
+  uint32_t pmuseren;
+  uint32_t pmcntenset;
+  // Read the user mode perf monitor counter access permissions.
+  asm volatile("mrc p15, 0, %0, c9, c14, 0" : "=r"(pmuseren));
+  if (pmuseren & 1) {  // Allows reading perfmon counters for user mode code.
+    asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r"(pmcntenset));
+    if (pmcntenset & 0x80000000ul) {  // Is it counting?
+      asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r"(pmccntr));
+      // The counter is set up to count every 64th cycle
+      return static_cast<int64_t>(pmccntr) * 64;  // Should optimize to << 6
+    }
+  }
+#endif
+  struct timeval tv;
+  gettimeofday(&tv, nullptr);
+  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
+#elif defined(__mips__) || defined(__m68k__)
+  // mips apparently only allows rdtsc for superusers, so we fall
+  // back to gettimeofday.  It's possible clock_gettime would be better.
+  struct timeval tv;
+  gettimeofday(&tv, nullptr);
+  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
+#elif defined(__loongarch__)
+  struct timeval tv;
+  gettimeofday(&tv, nullptr);
+  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
+#elif defined(__s390__)  // Covers both s390 and s390x.
+  // Return the CPU clock.
+  uint64_t tsc;
+#if defined(BENCHMARK_OS_ZOS) && defined(COMPILER_IBMXL)
+  // z/OS XL compiler HLASM syntax.
+  asm(" stck %0" : "=m"(tsc) : : "cc");
+#else
+  asm("stck %0" : "=Q"(tsc) : : "cc");
+#endif
+  return tsc;
+#elif defined(__riscv)  // RISC-V
+  // Use RDCYCLE (and RDCYCLEH on riscv32)
+#if __riscv_xlen == 32
+  uint32_t cycles_lo, cycles_hi0, cycles_hi1;
+  // This asm also includes the PowerPC overflow handling strategy, as above.
+  // Implemented in assembly because Clang insisted on branching.
+  asm volatile(
+      "rdcycleh %0\n"
+      "rdcycle %1\n"
+      "rdcycleh %2\n"
+      "sub %0, %0, %2\n"
+      "seqz %0, %0\n"
+      "sub %0, zero, %0\n"
+      "and %1, %1, %0\n"
+      : "=r"(cycles_hi0), "=r"(cycles_lo), "=r"(cycles_hi1));
+  return (static_cast<uint64_t>(cycles_hi1) << 32) | cycles_lo;
+#else
+  uint64_t cycles;
+  asm volatile("rdcycle %0" : "=r"(cycles));
+  return cycles;
+#endif
+#elif defined(__e2k__) || defined(__elbrus__)
+  struct timeval tv;
+  gettimeofday(&tv, nullptr);
+  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
+#else
+// The soft failover to a generic implementation is automatic only for ARM.
+// For other platforms the developer is expected to make an attempt to create
+// a fast implementation and use generic version if nothing better is available.
+#error You need to define CycleTimer for your OS and CPU
+#endif
+}
+}  // end namespace cycleclock
+}  // end namespace benchmark
+
+#endif  // BENCHMARK_CYCLECLOCK_H_
diff --git a/3rdparty/benchmark/src/internal_macros.h b/3rdparty/benchmark/src/internal_macros.h
new file mode 100644
index 00000000..91f367b8
--- /dev/null
+++ b/3rdparty/benchmark/src/internal_macros.h
@@ -0,0 +1,102 @@
+#ifndef BENCHMARK_INTERNAL_MACROS_H_
+#define BENCHMARK_INTERNAL_MACROS_H_
+
+#include "benchmark/benchmark.h"
+
+/* Needed to detect STL */
+#include <cstdlib>
+
+// clang-format off
+
+#ifndef __has_feature
+#define __has_feature(x) 0
+#endif
+
+#if defined(__clang__)
+  #if defined(__ibmxl__)
+    #if !defined(COMPILER_IBMXL)
+      #define COMPILER_IBMXL
+    #endif
+  #elif !defined(COMPILER_CLANG)
+    #define COMPILER_CLANG
+  #endif
+#elif defined(_MSC_VER)
+  #if !defined(COMPILER_MSVC)
+    #define COMPILER_MSVC
+  #endif
+#elif defined(__GNUC__)
+  #if !defined(COMPILER_GCC)
+    #define COMPILER_GCC
+  #endif
+#endif
+
+#if __has_feature(cxx_attributes)
+  #define BENCHMARK_NORETURN [[noreturn]]
+#elif defined(__GNUC__)
+  #define BENCHMARK_NORETURN __attribute__((noreturn))
+#elif defined(COMPILER_MSVC)
+  #define BENCHMARK_NORETURN __declspec(noreturn)
+#else
+  #define BENCHMARK_NORETURN
+#endif
+
+#if defined(__CYGWIN__)
+  #define BENCHMARK_OS_CYGWIN 1
+#elif defined(_WIN32)
+  #define BENCHMARK_OS_WINDOWS 1
+  #if defined(__MINGW32__)
+    #define BENCHMARK_OS_MINGW 1
+  #endif
+#elif defined(__APPLE__)
+  #define BENCHMARK_OS_APPLE 1
+  #include "TargetConditionals.h"
+  #if defined(TARGET_OS_MAC)
+    #define BENCHMARK_OS_MACOSX 1
+    #if defined(TARGET_OS_IPHONE)
+      #define BENCHMARK_OS_IOS 1
+    #endif
+  #endif
+#elif defined(__FreeBSD__)
+  #define BENCHMARK_OS_FREEBSD 1
+#elif defined(__NetBSD__)
+  #define BENCHMARK_OS_NETBSD 1
+#elif defined(__OpenBSD__)
+  #define BENCHMARK_OS_OPENBSD 1
+#elif defined(__DragonFly__)
+  #define BENCHMARK_OS_DRAGONFLY 1
+#elif defined(__linux__)
+  #define BENCHMARK_OS_LINUX 1
+#elif defined(__native_client__)
+  #define BENCHMARK_OS_NACL 1
+#elif defined(__EMSCRIPTEN__)
+  #define BENCHMARK_OS_EMSCRIPTEN 1
+#elif defined(__rtems__)
+  #define BENCHMARK_OS_RTEMS 1
+#elif defined(__Fuchsia__)
+#define BENCHMARK_OS_FUCHSIA 1
+#elif defined (__SVR4) && defined (__sun)
+#define BENCHMARK_OS_SOLARIS 1
+#elif defined(__QNX__)
+#define BENCHMARK_OS_QNX 1
+#elif defined(__MVS__)
+#define BENCHMARK_OS_ZOS 1
+#endif
+
+#if defined(__ANDROID__) && defined(__GLIBCXX__)
+#define BENCHMARK_STL_ANDROID_GNUSTL 1
+#endif
+
+#if !__has_feature(cxx_exceptions) && !defined(__cpp_exceptions) \
+     && !defined(__EXCEPTIONS)
+  #define BENCHMARK_HAS_NO_EXCEPTIONS
+#endif
+
+#if defined(COMPILER_CLANG) || defined(COMPILER_GCC)
+  #define BENCHMARK_MAYBE_UNUSED __attribute__((unused))
+#else
+  #define BENCHMARK_MAYBE_UNUSED
+#endif
+
+// clang-format on
+
+#endif  // BENCHMARK_INTERNAL_MACROS_H_
diff --git a/3rdparty/benchmark/src/json_reporter.cc b/3rdparty/benchmark/src/json_reporter.cc
new file mode 100644
index 00000000..e84a4ed2
--- /dev/null
+++ b/3rdparty/benchmark/src/json_reporter.cc
@@ -0,0 +1,323 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <algorithm>
+#include <cmath>
+#include <cstdint>
+#include <iomanip>  // for setprecision
+#include <iostream>
+#include <limits>
+#include <string>
+#include <tuple>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+#include "complexity.h"
+#include "string_util.h"
+#include "timers.h"
+
+namespace benchmark {
+namespace internal {
+extern std::map<std::string, std::string>* global_context;
+}
+
+namespace {
+
+std::string StrEscape(const std::string& s) {
+  std::string tmp;
+  tmp.reserve(s.size());
+  for (char c : s) {
+    switch (c) {
+      case '\b':
+        tmp += "\\b";
+        break;
+      case '\f':
+        tmp += "\\f";
+        break;
+      case '\n':
+        tmp += "\\n";
+        break;
+      case '\r':
+        tmp += "\\r";
+        break;
+      case '\t':
+        tmp += "\\t";
+        break;
+      case '\\':
+        tmp += "\\\\";
+        break;
+      case '"':
+        tmp += "\\\"";
+        break;
+      default:
+        tmp += c;
+        break;
+    }
+  }
+  return tmp;
+}
+
+std::string FormatKV(std::string const& key, std::string const& value) {
+  return StrFormat("\"%s\": \"%s\"", StrEscape(key).c_str(),
+                   StrEscape(value).c_str());
+}
+
+std::string FormatKV(std::string const& key, const char* value) {
+  return StrFormat("\"%s\": \"%s\"", StrEscape(key).c_str(),
+                   StrEscape(value).c_str());
+}
+
+std::string FormatKV(std::string const& key, bool value) {
+  return StrFormat("\"%s\": %s", StrEscape(key).c_str(),
+                   value ? "true" : "false");
+}
+
+std::string FormatKV(std::string const& key, int64_t value) {
+  std::stringstream ss;
+  ss << '"' << StrEscape(key) << "\": " << value;
+  return ss.str();
+}
+
+std::string FormatKV(std::string const& key, IterationCount value) {
+  std::stringstream ss;
+  ss << '"' << StrEscape(key) << "\": " << value;
+  return ss.str();
+}
+
+std::string FormatKV(std::string const& key, double value) {
+  std::stringstream ss;
+  ss << '"' << StrEscape(key) << "\": ";
+
+  if (std::isnan(value))
+    ss << (value < 0 ? "-" : "") << "NaN";
+  else if (std::isinf(value))
+    ss << (value < 0 ? "-" : "") << "Infinity";
+  else {
+    const auto max_digits10 =
+        std::numeric_limits<decltype(value)>::max_digits10;
+    const auto max_fractional_digits10 = max_digits10 - 1;
+    ss << std::scientific << std::setprecision(max_fractional_digits10)
+       << value;
+  }
+  return ss.str();
+}
+
+int64_t RoundDouble(double v) { return std::lround(v); }
+
+}  // end namespace
+
+bool JSONReporter::ReportContext(const Context& context) {
+  std::ostream& out = GetOutputStream();
+
+  out << "{\n";
+  std::string inner_indent(2, ' ');
+
+  // Open context block and print context information.
+  out << inner_indent << "\"context\": {\n";
+  std::string indent(4, ' ');
+
+  std::string walltime_value = LocalDateTimeString();
+  out << indent << FormatKV("date", walltime_value) << ",\n";
+
+  out << indent << FormatKV("host_name", context.sys_info.name) << ",\n";
+
+  if (Context::executable_name) {
+    out << indent << FormatKV("executable", Context::executable_name) << ",\n";
+  }
+
+  CPUInfo const& info = context.cpu_info;
+  out << indent << FormatKV("num_cpus", static_cast<int64_t>(info.num_cpus))
+      << ",\n";
+  out << indent
+      << FormatKV("mhz_per_cpu",
+                  RoundDouble(info.cycles_per_second / 1000000.0))
+      << ",\n";
+  if (CPUInfo::Scaling::UNKNOWN != info.scaling) {
+    out << indent
+        << FormatKV("cpu_scaling_enabled",
+                    info.scaling == CPUInfo::Scaling::ENABLED ? true : false)
+        << ",\n";
+  }
+
+  out << indent << "\"caches\": [\n";
+  indent = std::string(6, ' ');
+  std::string cache_indent(8, ' ');
+  for (size_t i = 0; i < info.caches.size(); ++i) {
+    auto& CI = info.caches[i];
+    out << indent << "{\n";
+    out << cache_indent << FormatKV("type", CI.type) << ",\n";
+    out << cache_indent << FormatKV("level", static_cast<int64_t>(CI.level))
+        << ",\n";
+    out << cache_indent << FormatKV("size", static_cast<int64_t>(CI.size))
+        << ",\n";
+    out << cache_indent
+        << FormatKV("num_sharing", static_cast<int64_t>(CI.num_sharing))
+        << "\n";
+    out << indent << "}";
+    if (i != info.caches.size() - 1) out << ",";
+    out << "\n";
+  }
+  indent = std::string(4, ' ');
+  out << indent << "],\n";
+  out << indent << "\"load_avg\": [";
+  for (auto it = info.load_avg.begin(); it != info.load_avg.end();) {
+    out << *it++;
+    if (it != info.load_avg.end()) out << ",";
+  }
+  out << "],\n";
+
+#if defined(NDEBUG)
+  const char build_type[] = "release";
+#else
+  const char build_type[] = "debug";
+#endif
+  out << indent << FormatKV("library_build_type", build_type);
+
+  if (internal::global_context != nullptr) {
+    for (const auto& kv : *internal::global_context) {
+      out << ",\n";
+      out << indent << FormatKV(kv.first, kv.second);
+    }
+  }
+  out << "\n";
+
+  // Close context block and open the list of benchmarks.
+  out << inner_indent << "},\n";
+  out << inner_indent << "\"benchmarks\": [\n";
+  return true;
+}
+
+void JSONReporter::ReportRuns(std::vector<Run> const& reports) {
+  if (reports.empty()) {
+    return;
+  }
+  std::string indent(4, ' ');
+  std::ostream& out = GetOutputStream();
+  if (!first_report_) {
+    out << ",\n";
+  }
+  first_report_ = false;
+
+  for (auto it = reports.begin(); it != reports.end(); ++it) {
+    out << indent << "{\n";
+    PrintRunData(*it);
+    out << indent << '}';
+    auto it_cp = it;
+    if (++it_cp != reports.end()) {
+      out << ",\n";
+    }
+  }
+}
+
+void JSONReporter::Finalize() {
+  // Close the list of benchmarks and the top level object.
+  GetOutputStream() << "\n  ]\n}\n";
+}
+
+void JSONReporter::PrintRunData(Run const& run) {
+  std::string indent(6, ' ');
+  std::ostream& out = GetOutputStream();
+  out << indent << FormatKV("name", run.benchmark_name()) << ",\n";
+  out << indent << FormatKV("family_index", run.family_index) << ",\n";
+  out << indent
+      << FormatKV("per_family_instance_index", run.per_family_instance_index)
+      << ",\n";
+  out << indent << FormatKV("run_name", run.run_name.str()) << ",\n";
+  out << indent << FormatKV("run_type", [&run]() -> const char* {
+    switch (run.run_type) {
+      case BenchmarkReporter::Run::RT_Iteration:
+        return "iteration";
+      case BenchmarkReporter::Run::RT_Aggregate:
+        return "aggregate";
+    }
+    BENCHMARK_UNREACHABLE();
+  }()) << ",\n";
+  out << indent << FormatKV("repetitions", run.repetitions) << ",\n";
+  if (run.run_type != BenchmarkReporter::Run::RT_Aggregate) {
+    out << indent << FormatKV("repetition_index", run.repetition_index)
+        << ",\n";
+  }
+  out << indent << FormatKV("threads", run.threads) << ",\n";
+  if (run.run_type == BenchmarkReporter::Run::RT_Aggregate) {
+    out << indent << FormatKV("aggregate_name", run.aggregate_name) << ",\n";
+    out << indent << FormatKV("aggregate_unit", [&run]() -> const char* {
+      switch (run.aggregate_unit) {
+        case StatisticUnit::kTime:
+          return "time";
+        case StatisticUnit::kPercentage:
+          return "percentage";
+      }
+      BENCHMARK_UNREACHABLE();
+    }()) << ",\n";
+  }
+  if (run.error_occurred) {
+    out << indent << FormatKV("error_occurred", run.error_occurred) << ",\n";
+    out << indent << FormatKV("error_message", run.error_message) << ",\n";
+  }
+  if (!run.report_big_o && !run.report_rms) {
+    out << indent << FormatKV("iterations", run.iterations) << ",\n";
+    if (run.run_type != Run::RT_Aggregate ||
+        run.aggregate_unit == StatisticUnit::kTime) {
+      out << indent << FormatKV("real_time", run.GetAdjustedRealTime())
+          << ",\n";
+      out << indent << FormatKV("cpu_time", run.GetAdjustedCPUTime());
+    } else {
+      assert(run.aggregate_unit == StatisticUnit::kPercentage);
+      out << indent << FormatKV("real_time", run.real_accumulated_time)
+          << ",\n";
+      out << indent << FormatKV("cpu_time", run.cpu_accumulated_time);
+    }
+    out << ",\n"
+        << indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
+  } else if (run.report_big_o) {
+    out << indent << FormatKV("cpu_coefficient", run.GetAdjustedCPUTime())
+        << ",\n";
+    out << indent << FormatKV("real_coefficient", run.GetAdjustedRealTime())
+        << ",\n";
+    out << indent << FormatKV("big_o", GetBigOString(run.complexity)) << ",\n";
+    out << indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
+  } else if (run.report_rms) {
+    out << indent << FormatKV("rms", run.GetAdjustedCPUTime());
+  }
+
+  for (auto& c : run.counters) {
+    out << ",\n" << indent << FormatKV(c.first, c.second);
+  }
+
+  if (run.memory_result) {
+    const MemoryManager::Result memory_result = *run.memory_result;
+    out << ",\n" << indent << FormatKV("allocs_per_iter", run.allocs_per_iter);
+    out << ",\n"
+        << indent << FormatKV("max_bytes_used", memory_result.max_bytes_used);
+
+    auto report_if_present = [&out, &indent](const char* label, int64_t val) {
+      if (val != MemoryManager::TombstoneValue)
+        out << ",\n" << indent << FormatKV(label, val);
+    };
+
+    report_if_present("total_allocated_bytes",
+                      memory_result.total_allocated_bytes);
+    report_if_present("net_heap_growth", memory_result.net_heap_growth);
+  }
+
+  if (!run.report_label.empty()) {
+    out << ",\n" << indent << FormatKV("label", run.report_label);
+  }
+  out << '\n';
+}
+
+const int64_t MemoryManager::TombstoneValue =
+    std::numeric_limits<int64_t>::max();
+
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/log.h b/3rdparty/benchmark/src/log.h
new file mode 100644
index 00000000..48c071ad
--- /dev/null
+++ b/3rdparty/benchmark/src/log.h
@@ -0,0 +1,74 @@
+#ifndef BENCHMARK_LOG_H_
+#define BENCHMARK_LOG_H_
+
+#include <iostream>
+#include <ostream>
+
+#include "benchmark/benchmark.h"
+
+namespace benchmark {
+namespace internal {
+
+typedef std::basic_ostream<char>&(EndLType)(std::basic_ostream<char>&);
+
+class LogType {
+  friend LogType& GetNullLogInstance();
+  friend LogType& GetErrorLogInstance();
+
+  // FIXME: Add locking to output.
+  template <class Tp>
+  friend LogType& operator<<(LogType&, Tp const&);
+  friend LogType& operator<<(LogType&, EndLType*);
+
+ private:
+  LogType(std::ostream* out) : out_(out) {}
+  std::ostream* out_;
+  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(LogType);
+};
+
+template <class Tp>
+LogType& operator<<(LogType& log, Tp const& value) {
+  if (log.out_) {
+    *log.out_ << value;
+  }
+  return log;
+}
+
+inline LogType& operator<<(LogType& log, EndLType* m) {
+  if (log.out_) {
+    *log.out_ << m;
+  }
+  return log;
+}
+
+inline int& LogLevel() {
+  static int log_level = 0;
+  return log_level;
+}
+
+inline LogType& GetNullLogInstance() {
+  static LogType log(nullptr);
+  return log;
+}
+
+inline LogType& GetErrorLogInstance() {
+  static LogType log(&std::clog);
+  return log;
+}
+
+inline LogType& GetLogInstanceForLevel(int level) {
+  if (level <= LogLevel()) {
+    return GetErrorLogInstance();
+  }
+  return GetNullLogInstance();
+}
+
+}  // end namespace internal
+}  // end namespace benchmark
+
+// clang-format off
+#define BM_VLOG(x)                                                               \
+  (::benchmark::internal::GetLogInstanceForLevel(x) << "-- LOG(" << x << "):" \
+                                                                         " ")
+// clang-format on
+#endif
diff --git a/3rdparty/benchmark/src/mutex.h b/3rdparty/benchmark/src/mutex.h
new file mode 100644
index 00000000..bec78d9e
--- /dev/null
+++ b/3rdparty/benchmark/src/mutex.h
@@ -0,0 +1,155 @@
+#ifndef BENCHMARK_MUTEX_H_
+#define BENCHMARK_MUTEX_H_
+
+#include <condition_variable>
+#include <mutex>
+
+#include "check.h"
+
+// Enable thread safety attributes only with clang.
+// The attributes can be safely erased when compiling with other compilers.
+#if defined(HAVE_THREAD_SAFETY_ATTRIBUTES)
+#define THREAD_ANNOTATION_ATTRIBUTE_(x) __attribute__((x))
+#else
+#define THREAD_ANNOTATION_ATTRIBUTE_(x)  // no-op
+#endif
+
+#define CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE_(capability(x))
+
+#define SCOPED_CAPABILITY THREAD_ANNOTATION_ATTRIBUTE_(scoped_lockable)
+
+#define GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE_(guarded_by(x))
+
+#define PT_GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE_(pt_guarded_by(x))
+
+#define ACQUIRED_BEFORE(...) \
+  THREAD_ANNOTATION_ATTRIBUTE_(acquired_before(__VA_ARGS__))
+
+#define ACQUIRED_AFTER(...) \
+  THREAD_ANNOTATION_ATTRIBUTE_(acquired_after(__VA_ARGS__))
+
+#define REQUIRES(...) \
+  THREAD_ANNOTATION_ATTRIBUTE_(requires_capability(__VA_ARGS__))
+
+#define REQUIRES_SHARED(...) \
+  THREAD_ANNOTATION_ATTRIBUTE_(requires_shared_capability(__VA_ARGS__))
+
+#define ACQUIRE(...) \
+  THREAD_ANNOTATION_ATTRIBUTE_(acquire_capability(__VA_ARGS__))
+
+#define ACQUIRE_SHARED(...) \
+  THREAD_ANNOTATION_ATTRIBUTE_(acquire_shared_capability(__VA_ARGS__))
+
+#define RELEASE(...) \
+  THREAD_ANNOTATION_ATTRIBUTE_(release_capability(__VA_ARGS__))
+
+#define RELEASE_SHARED(...) \
+  THREAD_ANNOTATION_ATTRIBUTE_(release_shared_capability(__VA_ARGS__))
+
+#define TRY_ACQUIRE(...) \
+  THREAD_ANNOTATION_ATTRIBUTE_(try_acquire_capability(__VA_ARGS__))
+
+#define TRY_ACQUIRE_SHARED(...) \
+  THREAD_ANNOTATION_ATTRIBUTE_(try_acquire_shared_capability(__VA_ARGS__))
+
+#define EXCLUDES(...) THREAD_ANNOTATION_ATTRIBUTE_(locks_excluded(__VA_ARGS__))
+
+#define ASSERT_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE_(assert_capability(x))
+
+#define ASSERT_SHARED_CAPABILITY(x) \
+  THREAD_ANNOTATION_ATTRIBUTE_(assert_shared_capability(x))
+
+#define RETURN_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE_(lock_returned(x))
+
+#define NO_THREAD_SAFETY_ANALYSIS \
+  THREAD_ANNOTATION_ATTRIBUTE_(no_thread_safety_analysis)
+
+namespace benchmark {
+
+typedef std::condition_variable Condition;
+
+// NOTE: Wrappers for std::mutex and std::unique_lock are provided so that
+// we can annotate them with thread safety attributes and use the
+// -Wthread-safety warning with clang. The standard library types cannot be
+// used directly because they do not provide the required annotations.
+class CAPABILITY("mutex") Mutex {
+ public:
+  Mutex() {}
+
+  void lock() ACQUIRE() { mut_.lock(); }
+  void unlock() RELEASE() { mut_.unlock(); }
+  std::mutex& native_handle() { return mut_; }
+
+ private:
+  std::mutex mut_;
+};
+
+class SCOPED_CAPABILITY MutexLock {
+  typedef std::unique_lock<std::mutex> MutexLockImp;
+
+ public:
+  MutexLock(Mutex& m) ACQUIRE(m) : ml_(m.native_handle()) {}
+  ~MutexLock() RELEASE() {}
+  MutexLockImp& native_handle() { return ml_; }
+
+ private:
+  MutexLockImp ml_;
+};
+
+class Barrier {
+ public:
+  Barrier(int num_threads) : running_threads_(num_threads) {}
+
+  // Called by each thread
+  bool wait() EXCLUDES(lock_) {
+    bool last_thread = false;
+    {
+      MutexLock ml(lock_);
+      last_thread = createBarrier(ml);
+    }
+    if (last_thread) phase_condition_.notify_all();
+    return last_thread;
+  }
+
+  void removeThread() EXCLUDES(lock_) {
+    MutexLock ml(lock_);
+    --running_threads_;
+    if (entered_ != 0) phase_condition_.notify_all();
+  }
+
+ private:
+  Mutex lock_;
+  Condition phase_condition_;
+  int running_threads_;
+
+  // State for barrier management
+  int phase_number_ = 0;
+  int entered_ = 0;  // Number of threads that have entered this barrier
+
+  // Enter the barrier and wait until all other threads have also
+  // entered the barrier.  Returns iff this is the last thread to
+  // enter the barrier.
+  bool createBarrier(MutexLock& ml) REQUIRES(lock_) {
+    BM_CHECK_LT(entered_, running_threads_);
+    entered_++;
+    if (entered_ < running_threads_) {
+      // Wait for all threads to enter
+      int phase_number_cp = phase_number_;
+      auto cb = [this, phase_number_cp]() {
+        return this->phase_number_ > phase_number_cp ||
+               entered_ == running_threads_;  // A thread has aborted in error
+      };
+      phase_condition_.wait(ml.native_handle(), cb);
+      if (phase_number_ > phase_number_cp) return false;
+      // else (running_threads_ == entered_) and we are the last thread.
+    }
+    // Last thread has reached the barrier
+    phase_number_++;
+    entered_ = 0;
+    return true;
+  }
+};
+
+}  // end namespace benchmark
+
+#endif  // BENCHMARK_MUTEX_H_
diff --git a/3rdparty/benchmark/src/perf_counters.cc b/3rdparty/benchmark/src/perf_counters.cc
new file mode 100644
index 00000000..b2ac7687
--- /dev/null
+++ b/3rdparty/benchmark/src/perf_counters.cc
@@ -0,0 +1,132 @@
+// Copyright 2021 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "perf_counters.h"
+
+#include <cstring>
+#include <vector>
+
+#if defined HAVE_LIBPFM
+#include "perfmon/pfmlib.h"
+#include "perfmon/pfmlib_perf_event.h"
+#endif
+
+namespace benchmark {
+namespace internal {
+
+constexpr size_t PerfCounterValues::kMaxCounters;
+
+#if defined HAVE_LIBPFM
+const bool PerfCounters::kSupported = true;
+
+bool PerfCounters::Initialize() { return pfm_initialize() == PFM_SUCCESS; }
+
+PerfCounters PerfCounters::Create(
+    const std::vector<std::string>& counter_names) {
+  if (counter_names.empty()) {
+    return NoCounters();
+  }
+  if (counter_names.size() > PerfCounterValues::kMaxCounters) {
+    GetErrorLogInstance()
+        << counter_names.size()
+        << " counters were requested. The minimum is 1, the maximum is "
+        << PerfCounterValues::kMaxCounters << "\n";
+    return NoCounters();
+  }
+  std::vector<int> counter_ids(counter_names.size());
+
+  const int mode = PFM_PLM3;  // user mode only
+  for (size_t i = 0; i < counter_names.size(); ++i) {
+    const bool is_first = i == 0;
+    struct perf_event_attr attr {};
+    attr.size = sizeof(attr);
+    const int group_id = !is_first ? counter_ids[0] : -1;
+    const auto& name = counter_names[i];
+    if (name.empty()) {
+      GetErrorLogInstance() << "A counter name was the empty string\n";
+      return NoCounters();
+    }
+    pfm_perf_encode_arg_t arg{};
+    arg.attr = &attr;
+
+    const int pfm_get =
+        pfm_get_os_event_encoding(name.c_str(), mode, PFM_OS_PERF_EVENT, &arg);
+    if (pfm_get != PFM_SUCCESS) {
+      GetErrorLogInstance() << "Unknown counter name: " << name << "\n";
+      return NoCounters();
+    }
+    attr.disabled = is_first;
+    // Note: the man page for perf_event_create suggests inerit = true and
+    // read_format = PERF_FORMAT_GROUP don't work together, but that's not the
+    // case.
+    attr.inherit = true;
+    attr.pinned = is_first;
+    attr.exclude_kernel = true;
+    attr.exclude_user = false;
+    attr.exclude_hv = true;
+    // Read all counters in one read.
+    attr.read_format = PERF_FORMAT_GROUP;
+
+    int id = -1;
+    static constexpr size_t kNrOfSyscallRetries = 5;
+    // Retry syscall as it was interrupted often (b/64774091).
+    for (size_t num_retries = 0; num_retries < kNrOfSyscallRetries;
+         ++num_retries) {
+      id = perf_event_open(&attr, 0, -1, group_id, 0);
+      if (id >= 0 || errno != EINTR) {
+        break;
+      }
+    }
+    if (id < 0) {
+      GetErrorLogInstance()
+          << "Failed to get a file descriptor for " << name << "\n";
+      return NoCounters();
+    }
+
+    counter_ids[i] = id;
+  }
+  if (ioctl(counter_ids[0], PERF_EVENT_IOC_ENABLE) != 0) {
+    GetErrorLogInstance() << "Failed to start counters\n";
+    return NoCounters();
+  }
+
+  return PerfCounters(counter_names, std::move(counter_ids));
+}
+
+PerfCounters::~PerfCounters() {
+  if (counter_ids_.empty()) {
+    return;
+  }
+  ioctl(counter_ids_[0], PERF_EVENT_IOC_DISABLE);
+  for (int fd : counter_ids_) {
+    close(fd);
+  }
+}
+#else   // defined HAVE_LIBPFM
+const bool PerfCounters::kSupported = false;
+
+bool PerfCounters::Initialize() { return false; }
+
+PerfCounters PerfCounters::Create(
+    const std::vector<std::string>& counter_names) {
+  if (!counter_names.empty()) {
+    GetErrorLogInstance() << "Performance counters not supported.";
+  }
+  return NoCounters();
+}
+
+PerfCounters::~PerfCounters() = default;
+#endif  // defined HAVE_LIBPFM
+}  // namespace internal
+}  // namespace benchmark
diff --git a/3rdparty/benchmark/src/perf_counters.h b/3rdparty/benchmark/src/perf_counters.h
new file mode 100644
index 00000000..47ca1385
--- /dev/null
+++ b/3rdparty/benchmark/src/perf_counters.h
@@ -0,0 +1,172 @@
+// Copyright 2021 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef BENCHMARK_PERF_COUNTERS_H
+#define BENCHMARK_PERF_COUNTERS_H
+
+#include <array>
+#include <cstdint>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+#include "check.h"
+#include "log.h"
+
+#ifndef BENCHMARK_OS_WINDOWS
+#include <unistd.h>
+#endif
+
+namespace benchmark {
+namespace internal {
+
+// Typically, we can only read a small number of counters. There is also a
+// padding preceding counter values, when reading multiple counters with one
+// syscall (which is desirable). PerfCounterValues abstracts these details.
+// The implementation ensures the storage is inlined, and allows 0-based
+// indexing into the counter values.
+// The object is used in conjunction with a PerfCounters object, by passing it
+// to Snapshot(). The values are populated such that
+// perfCounters->names()[i]'s value is obtained at position i (as given by
+// operator[]) of this object.
+class PerfCounterValues {
+ public:
+  explicit PerfCounterValues(size_t nr_counters) : nr_counters_(nr_counters) {
+    BM_CHECK_LE(nr_counters_, kMaxCounters);
+  }
+
+  uint64_t operator[](size_t pos) const { return values_[kPadding + pos]; }
+
+  static constexpr size_t kMaxCounters = 3;
+
+ private:
+  friend class PerfCounters;
+  // Get the byte buffer in which perf counters can be captured.
+  // This is used by PerfCounters::Read
+  std::pair<char*, size_t> get_data_buffer() {
+    return {reinterpret_cast<char*>(values_.data()),
+            sizeof(uint64_t) * (kPadding + nr_counters_)};
+  }
+
+  static constexpr size_t kPadding = 1;
+  std::array<uint64_t, kPadding + kMaxCounters> values_;
+  const size_t nr_counters_;
+};
+
+// Collect PMU counters. The object, once constructed, is ready to be used by
+// calling read(). PMU counter collection is enabled from the time create() is
+// called, to obtain the object, until the object's destructor is called.
+class PerfCounters final {
+ public:
+  // True iff this platform supports performance counters.
+  static const bool kSupported;
+
+  bool IsValid() const { return is_valid_; }
+  static PerfCounters NoCounters() { return PerfCounters(); }
+
+  ~PerfCounters();
+  PerfCounters(PerfCounters&&) = default;
+  PerfCounters(const PerfCounters&) = delete;
+
+  // Platform-specific implementations may choose to do some library
+  // initialization here.
+  static bool Initialize();
+
+  // Return a PerfCounters object ready to read the counters with the names
+  // specified. The values are user-mode only. The counter name format is
+  // implementation and OS specific.
+  // TODO: once we move to C++-17, this should be a std::optional, and then the
+  // IsValid() boolean can be dropped.
+  static PerfCounters Create(const std::vector<std::string>& counter_names);
+
+  // Take a snapshot of the current value of the counters into the provided
+  // valid PerfCounterValues storage. The values are populated such that:
+  // names()[i]'s value is (*values)[i]
+  BENCHMARK_ALWAYS_INLINE bool Snapshot(PerfCounterValues* values) const {
+#ifndef BENCHMARK_OS_WINDOWS
+    assert(values != nullptr);
+    assert(IsValid());
+    auto buffer = values->get_data_buffer();
+    auto read_bytes = ::read(counter_ids_[0], buffer.first, buffer.second);
+    return static_cast<size_t>(read_bytes) == buffer.second;
+#else
+    (void)values;
+    return false;
+#endif
+  }
+
+  const std::vector<std::string>& names() const { return counter_names_; }
+  size_t num_counters() const { return counter_names_.size(); }
+
+ private:
+  PerfCounters(const std::vector<std::string>& counter_names,
+               std::vector<int>&& counter_ids)
+      : counter_ids_(std::move(counter_ids)),
+        counter_names_(counter_names),
+        is_valid_(true) {}
+  PerfCounters() : is_valid_(false) {}
+
+  std::vector<int> counter_ids_;
+  const std::vector<std::string> counter_names_;
+  const bool is_valid_;
+};
+
+// Typical usage of the above primitives.
+class PerfCountersMeasurement final {
+ public:
+  PerfCountersMeasurement(PerfCounters&& c)
+      : counters_(std::move(c)),
+        start_values_(counters_.IsValid() ? counters_.names().size() : 0),
+        end_values_(counters_.IsValid() ? counters_.names().size() : 0) {}
+
+  bool IsValid() const { return counters_.IsValid(); }
+
+  BENCHMARK_ALWAYS_INLINE void Start() {
+    assert(IsValid());
+    // Tell the compiler to not move instructions above/below where we take
+    // the snapshot.
+    ClobberMemory();
+    counters_.Snapshot(&start_values_);
+    ClobberMemory();
+  }
+
+  BENCHMARK_ALWAYS_INLINE std::vector<std::pair<std::string, double>>
+  StopAndGetMeasurements() {
+    assert(IsValid());
+    // Tell the compiler to not move instructions above/below where we take
+    // the snapshot.
+    ClobberMemory();
+    counters_.Snapshot(&end_values_);
+    ClobberMemory();
+
+    std::vector<std::pair<std::string, double>> ret;
+    for (size_t i = 0; i < counters_.names().size(); ++i) {
+      double measurement = static_cast<double>(end_values_[i]) -
+                           static_cast<double>(start_values_[i]);
+      ret.push_back({counters_.names()[i], measurement});
+    }
+    return ret;
+  }
+
+ private:
+  PerfCounters counters_;
+  PerfCounterValues start_values_;
+  PerfCounterValues end_values_;
+};
+
+BENCHMARK_UNUSED static bool perf_init_anchor = PerfCounters::Initialize();
+
+}  // namespace internal
+}  // namespace benchmark
+
+#endif  // BENCHMARK_PERF_COUNTERS_H
diff --git a/3rdparty/benchmark/src/re.h b/3rdparty/benchmark/src/re.h
new file mode 100644
index 00000000..63004678
--- /dev/null
+++ b/3rdparty/benchmark/src/re.h
@@ -0,0 +1,158 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef BENCHMARK_RE_H_
+#define BENCHMARK_RE_H_
+
+#include "internal_macros.h"
+
+// clang-format off
+
+#if !defined(HAVE_STD_REGEX) && \
+    !defined(HAVE_GNU_POSIX_REGEX) && \
+    !defined(HAVE_POSIX_REGEX)
+  // No explicit regex selection; detect based on builtin hints.
+  #if defined(BENCHMARK_OS_LINUX) || defined(BENCHMARK_OS_APPLE)
+    #define HAVE_POSIX_REGEX 1
+  #elif __cplusplus >= 199711L
+    #define HAVE_STD_REGEX 1
+  #endif
+#endif
+
+// Prefer C regex libraries when compiling w/o exceptions so that we can
+// correctly report errors.
+#if defined(BENCHMARK_HAS_NO_EXCEPTIONS) && \
+    defined(BENCHMARK_HAVE_STD_REGEX) && \
+    (defined(HAVE_GNU_POSIX_REGEX) || defined(HAVE_POSIX_REGEX))
+  #undef HAVE_STD_REGEX
+#endif
+
+#if defined(HAVE_STD_REGEX)
+  #include <regex>
+#elif defined(HAVE_GNU_POSIX_REGEX)
+  #include <gnuregex.h>
+#elif defined(HAVE_POSIX_REGEX)
+  #include <regex.h>
+#else
+#error No regular expression backend was found!
+#endif
+
+// clang-format on
+
+#include <string>
+
+#include "check.h"
+
+namespace benchmark {
+
+// A wrapper around the POSIX regular expression API that provides automatic
+// cleanup
+class Regex {
+ public:
+  Regex() : init_(false) {}
+
+  ~Regex();
+
+  // Compile a regular expression matcher from spec.  Returns true on success.
+  //
+  // On failure (and if error is not nullptr), error is populated with a human
+  // readable error message if an error occurs.
+  bool Init(const std::string& spec, std::string* error);
+
+  // Returns whether str matches the compiled regular expression.
+  bool Match(const std::string& str);
+
+ private:
+  bool init_;
+// Underlying regular expression object
+#if defined(HAVE_STD_REGEX)
+  std::regex re_;
+#elif defined(HAVE_POSIX_REGEX) || defined(HAVE_GNU_POSIX_REGEX)
+  regex_t re_;
+#else
+#error No regular expression backend implementation available
+#endif
+};
+
+#if defined(HAVE_STD_REGEX)
+
+inline bool Regex::Init(const std::string& spec, std::string* error) {
+#ifdef BENCHMARK_HAS_NO_EXCEPTIONS
+  ((void)error);  // suppress unused warning
+#else
+  try {
+#endif
+  re_ = std::regex(spec, std::regex_constants::extended);
+  init_ = true;
+#ifndef BENCHMARK_HAS_NO_EXCEPTIONS
+}
+catch (const std::regex_error& e) {
+  if (error) {
+    *error = e.what();
+  }
+}
+#endif
+return init_;
+}
+
+inline Regex::~Regex() {}
+
+inline bool Regex::Match(const std::string& str) {
+  if (!init_) {
+    return false;
+  }
+  return std::regex_search(str, re_);
+}
+
+#else
+inline bool Regex::Init(const std::string& spec, std::string* error) {
+  int ec = regcomp(&re_, spec.c_str(), REG_EXTENDED | REG_NOSUB);
+  if (ec != 0) {
+    if (error) {
+      size_t needed = regerror(ec, &re_, nullptr, 0);
+      char* errbuf = new char[needed];
+      regerror(ec, &re_, errbuf, needed);
+
+      // regerror returns the number of bytes necessary to null terminate
+      // the string, so we move that when assigning to error.
+      BM_CHECK_NE(needed, 0);
+      error->assign(errbuf, needed - 1);
+
+      delete[] errbuf;
+    }
+
+    return false;
+  }
+
+  init_ = true;
+  return true;
+}
+
+inline Regex::~Regex() {
+  if (init_) {
+    regfree(&re_);
+  }
+}
+
+inline bool Regex::Match(const std::string& str) {
+  if (!init_) {
+    return false;
+  }
+  return regexec(&re_, str.c_str(), 0, nullptr, 0) == 0;
+}
+#endif
+
+}  // end namespace benchmark
+
+#endif  // BENCHMARK_RE_H_
diff --git a/3rdparty/benchmark/src/reporter.cc b/3rdparty/benchmark/src/reporter.cc
new file mode 100644
index 00000000..1d2df17b
--- /dev/null
+++ b/3rdparty/benchmark/src/reporter.cc
@@ -0,0 +1,114 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <cstdlib>
+#include <iostream>
+#include <map>
+#include <string>
+#include <tuple>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+#include "check.h"
+#include "string_util.h"
+#include "timers.h"
+
+namespace benchmark {
+namespace internal {
+extern std::map<std::string, std::string> *global_context;
+}
+
+BenchmarkReporter::BenchmarkReporter()
+    : output_stream_(&std::cout), error_stream_(&std::cerr) {}
+
+BenchmarkReporter::~BenchmarkReporter() {}
+
+void BenchmarkReporter::PrintBasicContext(std::ostream *out,
+                                          Context const &context) {
+  BM_CHECK(out) << "cannot be null";
+  auto &Out = *out;
+
+  Out << LocalDateTimeString() << "\n";
+
+  if (context.executable_name)
+    Out << "Running " << context.executable_name << "\n";
+
+  const CPUInfo &info = context.cpu_info;
+  Out << "Run on (" << info.num_cpus << " X "
+      << (info.cycles_per_second / 1000000.0) << " MHz CPU "
+      << ((info.num_cpus > 1) ? "s" : "") << ")\n";
+  if (info.caches.size() != 0) {
+    Out << "CPU Caches:\n";
+    for (auto &CInfo : info.caches) {
+      Out << "  L" << CInfo.level << " " << CInfo.type << " "
+          << (CInfo.size / 1024) << " KiB";
+      if (CInfo.num_sharing != 0)
+        Out << " (x" << (info.num_cpus / CInfo.num_sharing) << ")";
+      Out << "\n";
+    }
+  }
+  if (!info.load_avg.empty()) {
+    Out << "Load Average: ";
+    for (auto It = info.load_avg.begin(); It != info.load_avg.end();) {
+      Out << StrFormat("%.2f", *It++);
+      if (It != info.load_avg.end()) Out << ", ";
+    }
+    Out << "\n";
+  }
+
+  if (internal::global_context != nullptr) {
+    for (const auto &kv : *internal::global_context) {
+      Out << kv.first << ": " << kv.second << "\n";
+    }
+  }
+
+  if (CPUInfo::Scaling::ENABLED == info.scaling) {
+    Out << "***WARNING*** CPU scaling is enabled, the benchmark "
+           "real time measurements may be noisy and will incur extra "
+           "overhead.\n";
+  }
+
+#ifndef NDEBUG
+  Out << "***WARNING*** Library was built as DEBUG. Timings may be "
+         "affected.\n";
+#endif
+}
+
+// No initializer because it's already initialized to NULL.
+const char *BenchmarkReporter::Context::executable_name;
+
+BenchmarkReporter::Context::Context()
+    : cpu_info(CPUInfo::Get()), sys_info(SystemInfo::Get()) {}
+
+std::string BenchmarkReporter::Run::benchmark_name() const {
+  std::string name = run_name.str();
+  if (run_type == RT_Aggregate) {
+    name += "_" + aggregate_name;
+  }
+  return name;
+}
+
+double BenchmarkReporter::Run::GetAdjustedRealTime() const {
+  double new_time = real_accumulated_time * GetTimeUnitMultiplier(time_unit);
+  if (iterations != 0) new_time /= static_cast<double>(iterations);
+  return new_time;
+}
+
+double BenchmarkReporter::Run::GetAdjustedCPUTime() const {
+  double new_time = cpu_accumulated_time * GetTimeUnitMultiplier(time_unit);
+  if (iterations != 0) new_time /= static_cast<double>(iterations);
+  return new_time;
+}
+
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/sleep.cc b/3rdparty/benchmark/src/sleep.cc
new file mode 100644
index 00000000..ab59000f
--- /dev/null
+++ b/3rdparty/benchmark/src/sleep.cc
@@ -0,0 +1,66 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "sleep.h"
+
+#include <cerrno>
+#include <cstdlib>
+#include <ctime>
+
+#include "internal_macros.h"
+
+#ifdef BENCHMARK_OS_WINDOWS
+#include <windows.h>
+#endif
+
+#ifdef BENCHMARK_OS_ZOS
+#include <unistd.h>
+#endif
+
+namespace benchmark {
+#ifdef BENCHMARK_OS_WINDOWS
+// Window's Sleep takes milliseconds argument.
+void SleepForMilliseconds(int milliseconds) { Sleep(milliseconds); }
+void SleepForSeconds(double seconds) {
+  SleepForMilliseconds(static_cast<int>(kNumMillisPerSecond * seconds));
+}
+#else  // BENCHMARK_OS_WINDOWS
+void SleepForMicroseconds(int microseconds) {
+#ifdef BENCHMARK_OS_ZOS
+  // z/OS does not support nanosleep. Instead call sleep() and then usleep() to
+  // sleep for the remaining microseconds because usleep() will fail if its
+  // argument is greater than 1000000.
+  div_t sleepTime = div(microseconds, kNumMicrosPerSecond);
+  int seconds = sleepTime.quot;
+  while (seconds != 0) seconds = sleep(seconds);
+  while (usleep(sleepTime.rem) == -1 && errno == EINTR)
+    ;
+#else
+  struct timespec sleep_time;
+  sleep_time.tv_sec = microseconds / kNumMicrosPerSecond;
+  sleep_time.tv_nsec = (microseconds % kNumMicrosPerSecond) * kNumNanosPerMicro;
+  while (nanosleep(&sleep_time, &sleep_time) != 0 && errno == EINTR)
+    ;  // Ignore signals and wait for the full interval to elapse.
+#endif
+}
+
+void SleepForMilliseconds(int milliseconds) {
+  SleepForMicroseconds(milliseconds * kNumMicrosPerMilli);
+}
+
+void SleepForSeconds(double seconds) {
+  SleepForMicroseconds(static_cast<int>(seconds * kNumMicrosPerSecond));
+}
+#endif  // BENCHMARK_OS_WINDOWS
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/sleep.h b/3rdparty/benchmark/src/sleep.h
new file mode 100644
index 00000000..f98551af
--- /dev/null
+++ b/3rdparty/benchmark/src/sleep.h
@@ -0,0 +1,15 @@
+#ifndef BENCHMARK_SLEEP_H_
+#define BENCHMARK_SLEEP_H_
+
+namespace benchmark {
+const int kNumMillisPerSecond = 1000;
+const int kNumMicrosPerMilli = 1000;
+const int kNumMicrosPerSecond = kNumMillisPerSecond * 1000;
+const int kNumNanosPerMicro = 1000;
+const int kNumNanosPerSecond = kNumNanosPerMicro * kNumMicrosPerSecond;
+
+void SleepForMilliseconds(int milliseconds);
+void SleepForSeconds(double seconds);
+}  // end namespace benchmark
+
+#endif  // BENCHMARK_SLEEP_H_
diff --git a/3rdparty/benchmark/src/statistics.cc b/3rdparty/benchmark/src/statistics.cc
new file mode 100644
index 00000000..3e5ef099
--- /dev/null
+++ b/3rdparty/benchmark/src/statistics.cc
@@ -0,0 +1,208 @@
+// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
+// Copyright 2017 Roman Lebedev. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "statistics.h"
+
+#include <algorithm>
+#include <cmath>
+#include <numeric>
+#include <string>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+#include "check.h"
+
+namespace benchmark {
+
+auto StatisticsSum = [](const std::vector<double>& v) {
+  return std::accumulate(v.begin(), v.end(), 0.0);
+};
+
+double StatisticsMean(const std::vector<double>& v) {
+  if (v.empty()) return 0.0;
+  return StatisticsSum(v) * (1.0 / v.size());
+}
+
+double StatisticsMedian(const std::vector<double>& v) {
+  if (v.size() < 3) return StatisticsMean(v);
+  std::vector<double> copy(v);
+
+  auto center = copy.begin() + v.size() / 2;
+  std::nth_element(copy.begin(), center, copy.end());
+
+  // did we have an odd number of samples?
+  // if yes, then center is the median
+  // it no, then we are looking for the average between center and the value
+  // before
+  if (v.size() % 2 == 1) return *center;
+  auto center2 = copy.begin() + v.size() / 2 - 1;
+  std::nth_element(copy.begin(), center2, copy.end());
+  return (*center + *center2) / 2.0;
+}
+
+// Return the sum of the squares of this sample set
+auto SumSquares = [](const std::vector<double>& v) {
+  return std::inner_product(v.begin(), v.end(), v.begin(), 0.0);
+};
+
+auto Sqr = [](const double dat) { return dat * dat; };
+auto Sqrt = [](const double dat) {
+  // Avoid NaN due to imprecision in the calculations
+  if (dat < 0.0) return 0.0;
+  return std::sqrt(dat);
+};
+
+double StatisticsStdDev(const std::vector<double>& v) {
+  const auto mean = StatisticsMean(v);
+  if (v.empty()) return mean;
+
+  // Sample standard deviation is undefined for n = 1
+  if (v.size() == 1) return 0.0;
+
+  const double avg_squares = SumSquares(v) * (1.0 / v.size());
+  return Sqrt(v.size() / (v.size() - 1.0) * (avg_squares - Sqr(mean)));
+}
+
+double StatisticsCV(const std::vector<double>& v) {
+  if (v.size() < 2) return 0.0;
+
+  const auto stddev = StatisticsStdDev(v);
+  const auto mean = StatisticsMean(v);
+
+  return stddev / mean;
+}
+
+std::vector<BenchmarkReporter::Run> ComputeStats(
+    const std::vector<BenchmarkReporter::Run>& reports) {
+  typedef BenchmarkReporter::Run Run;
+  std::vector<Run> results;
+
+  auto error_count =
+      std::count_if(reports.begin(), reports.end(),
+                    [](Run const& run) { return run.error_occurred; });
+
+  if (reports.size() - error_count < 2) {
+    // We don't report aggregated data if there was a single run.
+    return results;
+  }
+
+  // Accumulators.
+  std::vector<double> real_accumulated_time_stat;
+  std::vector<double> cpu_accumulated_time_stat;
+
+  real_accumulated_time_stat.reserve(reports.size());
+  cpu_accumulated_time_stat.reserve(reports.size());
+
+  // All repetitions should be run with the same number of iterations so we
+  // can take this information from the first benchmark.
+  const IterationCount run_iterations = reports.front().iterations;
+  // create stats for user counters
+  struct CounterStat {
+    Counter c;
+    std::vector<double> s;
+  };
+  std::map<std::string, CounterStat> counter_stats;
+  for (Run const& r : reports) {
+    for (auto const& cnt : r.counters) {
+      auto it = counter_stats.find(cnt.first);
+      if (it == counter_stats.end()) {
+        counter_stats.insert({cnt.first, {cnt.second, std::vector<double>{}}});
+        it = counter_stats.find(cnt.first);
+        it->second.s.reserve(reports.size());
+      } else {
+        BM_CHECK_EQ(counter_stats[cnt.first].c.flags, cnt.second.flags);
+      }
+    }
+  }
+
+  // Populate the accumulators.
+  for (Run const& run : reports) {
+    BM_CHECK_EQ(reports[0].benchmark_name(), run.benchmark_name());
+    BM_CHECK_EQ(run_iterations, run.iterations);
+    if (run.error_occurred) continue;
+    real_accumulated_time_stat.emplace_back(run.real_accumulated_time);
+    cpu_accumulated_time_stat.emplace_back(run.cpu_accumulated_time);
+    // user counters
+    for (auto const& cnt : run.counters) {
+      auto it = counter_stats.find(cnt.first);
+      BM_CHECK_NE(it, counter_stats.end());
+      it->second.s.emplace_back(cnt.second);
+    }
+  }
+
+  // Only add label if it is same for all runs
+  std::string report_label = reports[0].report_label;
+  for (std::size_t i = 1; i < reports.size(); i++) {
+    if (reports[i].report_label != report_label) {
+      report_label = "";
+      break;
+    }
+  }
+
+  const double iteration_rescale_factor =
+      double(reports.size()) / double(run_iterations);
+
+  for (const auto& Stat : *reports[0].statistics) {
+    // Get the data from the accumulator to BenchmarkReporter::Run's.
+    Run data;
+    data.run_name = reports[0].run_name;
+    data.family_index = reports[0].family_index;
+    data.per_family_instance_index = reports[0].per_family_instance_index;
+    data.run_type = BenchmarkReporter::Run::RT_Aggregate;
+    data.threads = reports[0].threads;
+    data.repetitions = reports[0].repetitions;
+    data.repetition_index = Run::no_repetition_index;
+    data.aggregate_name = Stat.name_;
+    data.aggregate_unit = Stat.unit_;
+    data.report_label = report_label;
+
+    // It is incorrect to say that an aggregate is computed over
+    // run's iterations, because those iterations already got averaged.
+    // Similarly, if there are N repetitions with 1 iterations each,
+    // an aggregate will be computed over N measurements, not 1.
+    // Thus it is best to simply use the count of separate reports.
+    data.iterations = reports.size();
+
+    data.real_accumulated_time = Stat.compute_(real_accumulated_time_stat);
+    data.cpu_accumulated_time = Stat.compute_(cpu_accumulated_time_stat);
+
+    if (data.aggregate_unit == StatisticUnit::kTime) {
+      // We will divide these times by data.iterations when reporting, but the
+      // data.iterations is not necessarily the scale of these measurements,
+      // because in each repetition, these timers are sum over all the iters.
+      // And if we want to say that the stats are over N repetitions and not
+      // M iterations, we need to multiply these by (N/M).
+      data.real_accumulated_time *= iteration_rescale_factor;
+      data.cpu_accumulated_time *= iteration_rescale_factor;
+    }
+
+    data.time_unit = reports[0].time_unit;
+
+    // user counters
+    for (auto const& kv : counter_stats) {
+      // Do *NOT* rescale the custom counters. They are already properly scaled.
+      const auto uc_stat = Stat.compute_(kv.second.s);
+      auto c = Counter(uc_stat, counter_stats[kv.first].c.flags,
+                       counter_stats[kv.first].c.oneK);
+      data.counters[kv.first] = c;
+    }
+
+    results.push_back(data);
+  }
+
+  return results;
+}
+
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/statistics.h b/3rdparty/benchmark/src/statistics.h
new file mode 100644
index 00000000..a9545a58
--- /dev/null
+++ b/3rdparty/benchmark/src/statistics.h
@@ -0,0 +1,38 @@
+// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
+// Copyright 2017 Roman Lebedev. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef STATISTICS_H_
+#define STATISTICS_H_
+
+#include <vector>
+
+#include "benchmark/benchmark.h"
+
+namespace benchmark {
+
+// Return a vector containing the mean, median and standard devation information
+// (and any user-specified info) for the specified list of reports. If 'reports'
+// contains less than two non-errored runs an empty vector is returned
+std::vector<BenchmarkReporter::Run> ComputeStats(
+    const std::vector<BenchmarkReporter::Run>& reports);
+
+double StatisticsMean(const std::vector<double>& v);
+double StatisticsMedian(const std::vector<double>& v);
+double StatisticsStdDev(const std::vector<double>& v);
+double StatisticsCV(const std::vector<double>& v);
+
+}  // end namespace benchmark
+
+#endif  // STATISTICS_H_
diff --git a/3rdparty/benchmark/src/string_util.cc b/3rdparty/benchmark/src/string_util.cc
new file mode 100644
index 00000000..401fa13d
--- /dev/null
+++ b/3rdparty/benchmark/src/string_util.cc
@@ -0,0 +1,265 @@
+#include "string_util.h"
+
+#include <array>
+#ifdef BENCHMARK_STL_ANDROID_GNUSTL
+#include <cerrno>
+#endif
+#include <cmath>
+#include <cstdarg>
+#include <cstdio>
+#include <memory>
+#include <sstream>
+
+#include "arraysize.h"
+
+namespace benchmark {
+namespace {
+
+// kilo, Mega, Giga, Tera, Peta, Exa, Zetta, Yotta.
+const char kBigSIUnits[] = "kMGTPEZY";
+// Kibi, Mebi, Gibi, Tebi, Pebi, Exbi, Zebi, Yobi.
+const char kBigIECUnits[] = "KMGTPEZY";
+// milli, micro, nano, pico, femto, atto, zepto, yocto.
+const char kSmallSIUnits[] = "munpfazy";
+
+// We require that all three arrays have the same size.
+static_assert(arraysize(kBigSIUnits) == arraysize(kBigIECUnits),
+              "SI and IEC unit arrays must be the same size");
+static_assert(arraysize(kSmallSIUnits) == arraysize(kBigSIUnits),
+              "Small SI and Big SI unit arrays must be the same size");
+
+static const int64_t kUnitsSize = arraysize(kBigSIUnits);
+
+void ToExponentAndMantissa(double val, double thresh, int precision,
+                           double one_k, std::string* mantissa,
+                           int64_t* exponent) {
+  std::stringstream mantissa_stream;
+
+  if (val < 0) {
+    mantissa_stream << "-";
+    val = -val;
+  }
+
+  // Adjust threshold so that it never excludes things which can't be rendered
+  // in 'precision' digits.
+  const double adjusted_threshold =
+      std::max(thresh, 1.0 / std::pow(10.0, precision));
+  const double big_threshold = adjusted_threshold * one_k;
+  const double small_threshold = adjusted_threshold;
+  // Values in ]simple_threshold,small_threshold[ will be printed as-is
+  const double simple_threshold = 0.01;
+
+  if (val > big_threshold) {
+    // Positive powers
+    double scaled = val;
+    for (size_t i = 0; i < arraysize(kBigSIUnits); ++i) {
+      scaled /= one_k;
+      if (scaled <= big_threshold) {
+        mantissa_stream << scaled;
+        *exponent = i + 1;
+        *mantissa = mantissa_stream.str();
+        return;
+      }
+    }
+    mantissa_stream << val;
+    *exponent = 0;
+  } else if (val < small_threshold) {
+    // Negative powers
+    if (val < simple_threshold) {
+      double scaled = val;
+      for (size_t i = 0; i < arraysize(kSmallSIUnits); ++i) {
+        scaled *= one_k;
+        if (scaled >= small_threshold) {
+          mantissa_stream << scaled;
+          *exponent = -static_cast<int64_t>(i + 1);
+          *mantissa = mantissa_stream.str();
+          return;
+        }
+      }
+    }
+    mantissa_stream << val;
+    *exponent = 0;
+  } else {
+    mantissa_stream << val;
+    *exponent = 0;
+  }
+  *mantissa = mantissa_stream.str();
+}
+
+std::string ExponentToPrefix(int64_t exponent, bool iec) {
+  if (exponent == 0) return "";
+
+  const int64_t index = (exponent > 0 ? exponent - 1 : -exponent - 1);
+  if (index >= kUnitsSize) return "";
+
+  const char* array =
+      (exponent > 0 ? (iec ? kBigIECUnits : kBigSIUnits) : kSmallSIUnits);
+  if (iec)
+    return array[index] + std::string("i");
+  else
+    return std::string(1, array[index]);
+}
+
+std::string ToBinaryStringFullySpecified(double value, double threshold,
+                                         int precision, double one_k = 1024.0) {
+  std::string mantissa;
+  int64_t exponent;
+  ToExponentAndMantissa(value, threshold, precision, one_k, &mantissa,
+                        &exponent);
+  return mantissa + ExponentToPrefix(exponent, false);
+}
+
+}  // end namespace
+
+void AppendHumanReadable(int n, std::string* str) {
+  std::stringstream ss;
+  // Round down to the nearest SI prefix.
+  ss << ToBinaryStringFullySpecified(n, 1.0, 0);
+  *str += ss.str();
+}
+
+std::string HumanReadableNumber(double n, double one_k) {
+  // 1.1 means that figures up to 1.1k should be shown with the next unit down;
+  // this softens edge effects.
+  // 1 means that we should show one decimal place of precision.
+  return ToBinaryStringFullySpecified(n, 1.1, 1, one_k);
+}
+
+std::string StrFormatImp(const char* msg, va_list args) {
+  // we might need a second shot at this, so pre-emptivly make a copy
+  va_list args_cp;
+  va_copy(args_cp, args);
+
+  // TODO(ericwf): use std::array for first attempt to avoid one memory
+  // allocation guess what the size might be
+  std::array<char, 256> local_buff;
+  std::size_t size = local_buff.size();
+  // 2015-10-08: vsnprintf is used instead of snd::vsnprintf due to a limitation
+  // in the android-ndk
+  auto ret = vsnprintf(local_buff.data(), size, msg, args_cp);
+
+  va_end(args_cp);
+
+  // handle empty expansion
+  if (ret == 0) return std::string{};
+  if (static_cast<std::size_t>(ret) < size)
+    return std::string(local_buff.data());
+
+  // we did not provide a long enough buffer on our first attempt.
+  // add 1 to size to account for null-byte in size cast to prevent overflow
+  size = static_cast<std::size_t>(ret) + 1;
+  auto buff_ptr = std::unique_ptr<char[]>(new char[size]);
+  // 2015-10-08: vsnprintf is used instead of snd::vsnprintf due to a limitation
+  // in the android-ndk
+  vsnprintf(buff_ptr.get(), size, msg, args);
+  return std::string(buff_ptr.get());
+}
+
+std::string StrFormat(const char* format, ...) {
+  va_list args;
+  va_start(args, format);
+  std::string tmp = StrFormatImp(format, args);
+  va_end(args);
+  return tmp;
+}
+
+std::vector<std::string> StrSplit(const std::string& str, char delim) {
+  if (str.empty()) return {};
+  std::vector<std::string> ret;
+  size_t first = 0;
+  size_t next = str.find(delim);
+  for (; next != std::string::npos;
+       first = next + 1, next = str.find(delim, first)) {
+    ret.push_back(str.substr(first, next - first));
+  }
+  ret.push_back(str.substr(first));
+  return ret;
+}
+
+#ifdef BENCHMARK_STL_ANDROID_GNUSTL
+/*
+ * GNU STL in Android NDK lacks support for some C++11 functions, including
+ * stoul, stoi, stod. We reimplement them here using C functions strtoul,
+ * strtol, strtod. Note that reimplemented functions are in benchmark::
+ * namespace, not std:: namespace.
+ */
+unsigned long stoul(const std::string& str, size_t* pos, int base) {
+  /* Record previous errno */
+  const int oldErrno = errno;
+  errno = 0;
+
+  const char* strStart = str.c_str();
+  char* strEnd = const_cast<char*>(strStart);
+  const unsigned long result = strtoul(strStart, &strEnd, base);
+
+  const int strtoulErrno = errno;
+  /* Restore previous errno */
+  errno = oldErrno;
+
+  /* Check for errors and return */
+  if (strtoulErrno == ERANGE) {
+    throw std::out_of_range("stoul failed: " + str +
+                            " is outside of range of unsigned long");
+  } else if (strEnd == strStart || strtoulErrno != 0) {
+    throw std::invalid_argument("stoul failed: " + str + " is not an integer");
+  }
+  if (pos != nullptr) {
+    *pos = static_cast<size_t>(strEnd - strStart);
+  }
+  return result;
+}
+
+int stoi(const std::string& str, size_t* pos, int base) {
+  /* Record previous errno */
+  const int oldErrno = errno;
+  errno = 0;
+
+  const char* strStart = str.c_str();
+  char* strEnd = const_cast<char*>(strStart);
+  const long result = strtol(strStart, &strEnd, base);
+
+  const int strtolErrno = errno;
+  /* Restore previous errno */
+  errno = oldErrno;
+
+  /* Check for errors and return */
+  if (strtolErrno == ERANGE || long(int(result)) != result) {
+    throw std::out_of_range("stoul failed: " + str +
+                            " is outside of range of int");
+  } else if (strEnd == strStart || strtolErrno != 0) {
+    throw std::invalid_argument("stoul failed: " + str + " is not an integer");
+  }
+  if (pos != nullptr) {
+    *pos = static_cast<size_t>(strEnd - strStart);
+  }
+  return int(result);
+}
+
+double stod(const std::string& str, size_t* pos) {
+  /* Record previous errno */
+  const int oldErrno = errno;
+  errno = 0;
+
+  const char* strStart = str.c_str();
+  char* strEnd = const_cast<char*>(strStart);
+  const double result = strtod(strStart, &strEnd);
+
+  /* Restore previous errno */
+  const int strtodErrno = errno;
+  errno = oldErrno;
+
+  /* Check for errors and return */
+  if (strtodErrno == ERANGE) {
+    throw std::out_of_range("stoul failed: " + str +
+                            " is outside of range of int");
+  } else if (strEnd == strStart || strtodErrno != 0) {
+    throw std::invalid_argument("stoul failed: " + str + " is not an integer");
+  }
+  if (pos != nullptr) {
+    *pos = static_cast<size_t>(strEnd - strStart);
+  }
+  return result;
+}
+#endif
+
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/string_util.h b/3rdparty/benchmark/src/string_util.h
new file mode 100644
index 00000000..ff3b7da4
--- /dev/null
+++ b/3rdparty/benchmark/src/string_util.h
@@ -0,0 +1,65 @@
+#ifndef BENCHMARK_STRING_UTIL_H_
+#define BENCHMARK_STRING_UTIL_H_
+
+#include <sstream>
+#include <string>
+#include <utility>
+
+#include "internal_macros.h"
+
+namespace benchmark {
+
+void AppendHumanReadable(int n, std::string* str);
+
+std::string HumanReadableNumber(double n, double one_k = 1024.0);
+
+#if defined(__MINGW32__)
+__attribute__((format(__MINGW_PRINTF_FORMAT, 1, 2)))
+#elif defined(__GNUC__)
+__attribute__((format(printf, 1, 2)))
+#endif
+std::string
+StrFormat(const char* format, ...);
+
+inline std::ostream& StrCatImp(std::ostream& out) BENCHMARK_NOEXCEPT {
+  return out;
+}
+
+template <class First, class... Rest>
+inline std::ostream& StrCatImp(std::ostream& out, First&& f, Rest&&... rest) {
+  out << std::forward<First>(f);
+  return StrCatImp(out, std::forward<Rest>(rest)...);
+}
+
+template <class... Args>
+inline std::string StrCat(Args&&... args) {
+  std::ostringstream ss;
+  StrCatImp(ss, std::forward<Args>(args)...);
+  return ss.str();
+}
+
+std::vector<std::string> StrSplit(const std::string& str, char delim);
+
+// Disable lint checking for this block since it re-implements C functions.
+// NOLINTBEGIN
+#ifdef BENCHMARK_STL_ANDROID_GNUSTL
+/*
+ * GNU STL in Android NDK lacks support for some C++11 functions, including
+ * stoul, stoi, stod. We reimplement them here using C functions strtoul,
+ * strtol, strtod. Note that reimplemented functions are in benchmark::
+ * namespace, not std:: namespace.
+ */
+unsigned long stoul(const std::string& str, size_t* pos = nullptr,
+                    int base = 10);
+int stoi(const std::string& str, size_t* pos = nullptr, int base = 10);
+double stod(const std::string& str, size_t* pos = nullptr);
+#else
+using std::stod;   // NOLINT(misc-unused-using-decls)
+using std::stoi;   // NOLINT(misc-unused-using-decls)
+using std::stoul;  // NOLINT(misc-unused-using-decls)
+#endif
+// NOLINTEND
+
+}  // end namespace benchmark
+
+#endif  // BENCHMARK_STRING_UTIL_H_
diff --git a/3rdparty/benchmark/src/sysinfo.cc b/3rdparty/benchmark/src/sysinfo.cc
new file mode 100644
index 00000000..87dcfb46
--- /dev/null
+++ b/3rdparty/benchmark/src/sysinfo.cc
@@ -0,0 +1,725 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "internal_macros.h"
+
+#ifdef BENCHMARK_OS_WINDOWS
+#include <shlwapi.h>
+#undef StrCat  // Don't let StrCat in string_util.h be renamed to lstrcatA
+#include <versionhelpers.h>
+#include <windows.h>
+
+#include <codecvt>
+#else
+#include <fcntl.h>
+#ifndef BENCHMARK_OS_FUCHSIA
+#include <sys/resource.h>
+#endif
+#include <sys/time.h>
+#include <sys/types.h>  // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
+#include <unistd.h>
+#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_MACOSX || \
+    defined BENCHMARK_OS_NETBSD || defined BENCHMARK_OS_OPENBSD || \
+    defined BENCHMARK_OS_DRAGONFLY
+#define BENCHMARK_HAS_SYSCTL
+#include <sys/sysctl.h>
+#endif
+#endif
+#if defined(BENCHMARK_OS_SOLARIS)
+#include <kstat.h>
+#endif
+#if defined(BENCHMARK_OS_QNX)
+#include <sys/syspage.h>
+#endif
+
+#include <algorithm>
+#include <array>
+#include <bitset>
+#include <cerrno>
+#include <climits>
+#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <fstream>
+#include <iostream>
+#include <iterator>
+#include <limits>
+#include <locale>
+#include <memory>
+#include <sstream>
+#include <utility>
+
+#include "check.h"
+#include "cycleclock.h"
+#include "internal_macros.h"
+#include "log.h"
+#include "sleep.h"
+#include "string_util.h"
+
+namespace benchmark {
+namespace {
+
+void PrintImp(std::ostream& out) { out << std::endl; }
+
+template <class First, class... Rest>
+void PrintImp(std::ostream& out, First&& f, Rest&&... rest) {
+  out << std::forward<First>(f);
+  PrintImp(out, std::forward<Rest>(rest)...);
+}
+
+template <class... Args>
+BENCHMARK_NORETURN void PrintErrorAndDie(Args&&... args) {
+  PrintImp(std::cerr, std::forward<Args>(args)...);
+  std::exit(EXIT_FAILURE);
+}
+
+#ifdef BENCHMARK_HAS_SYSCTL
+
+/// ValueUnion - A type used to correctly alias the byte-for-byte output of
+/// `sysctl` with the result type it's to be interpreted as.
+struct ValueUnion {
+  union DataT {
+    uint32_t uint32_value;
+    uint64_t uint64_value;
+    // For correct aliasing of union members from bytes.
+    char bytes[8];
+  };
+  using DataPtr = std::unique_ptr<DataT, decltype(&std::free)>;
+
+  // The size of the data union member + its trailing array size.
+  size_t Size;
+  DataPtr Buff;
+
+ public:
+  ValueUnion() : Size(0), Buff(nullptr, &std::free) {}
+
+  explicit ValueUnion(size_t BuffSize)
+      : Size(sizeof(DataT) + BuffSize),
+        Buff(::new (std::malloc(Size)) DataT(), &std::free) {}
+
+  ValueUnion(ValueUnion&& other) = default;
+
+  explicit operator bool() const { return bool(Buff); }
+
+  char* data() const { return Buff->bytes; }
+
+  std::string GetAsString() const { return std::string(data()); }
+
+  int64_t GetAsInteger() const {
+    if (Size == sizeof(Buff->uint32_value))
+      return static_cast<int32_t>(Buff->uint32_value);
+    else if (Size == sizeof(Buff->uint64_value))
+      return static_cast<int64_t>(Buff->uint64_value);
+    BENCHMARK_UNREACHABLE();
+  }
+
+  uint64_t GetAsUnsigned() const {
+    if (Size == sizeof(Buff->uint32_value))
+      return Buff->uint32_value;
+    else if (Size == sizeof(Buff->uint64_value))
+      return Buff->uint64_value;
+    BENCHMARK_UNREACHABLE();
+  }
+
+  template <class T, int N>
+  std::array<T, N> GetAsArray() {
+    const int ArrSize = sizeof(T) * N;
+    BM_CHECK_LE(ArrSize, Size);
+    std::array<T, N> Arr;
+    std::memcpy(Arr.data(), data(), ArrSize);
+    return Arr;
+  }
+};
+
+ValueUnion GetSysctlImp(std::string const& Name) {
+#if defined BENCHMARK_OS_OPENBSD
+  int mib[2];
+
+  mib[0] = CTL_HW;
+  if ((Name == "hw.ncpu") || (Name == "hw.cpuspeed")) {
+    ValueUnion buff(sizeof(int));
+
+    if (Name == "hw.ncpu") {
+      mib[1] = HW_NCPU;
+    } else {
+      mib[1] = HW_CPUSPEED;
+    }
+
+    if (sysctl(mib, 2, buff.data(), &buff.Size, nullptr, 0) == -1) {
+      return ValueUnion();
+    }
+    return buff;
+  }
+  return ValueUnion();
+#else
+  size_t CurBuffSize = 0;
+  if (sysctlbyname(Name.c_str(), nullptr, &CurBuffSize, nullptr, 0) == -1)
+    return ValueUnion();
+
+  ValueUnion buff(CurBuffSize);
+  if (sysctlbyname(Name.c_str(), buff.data(), &buff.Size, nullptr, 0) == 0)
+    return buff;
+  return ValueUnion();
+#endif
+}
+
+BENCHMARK_MAYBE_UNUSED
+bool GetSysctl(std::string const& Name, std::string* Out) {
+  Out->clear();
+  auto Buff = GetSysctlImp(Name);
+  if (!Buff) return false;
+  Out->assign(Buff.data());
+  return true;
+}
+
+template <class Tp,
+          class = typename std::enable_if<std::is_integral<Tp>::value>::type>
+bool GetSysctl(std::string const& Name, Tp* Out) {
+  *Out = 0;
+  auto Buff = GetSysctlImp(Name);
+  if (!Buff) return false;
+  *Out = static_cast<Tp>(Buff.GetAsUnsigned());
+  return true;
+}
+
+template <class Tp, size_t N>
+bool GetSysctl(std::string const& Name, std::array<Tp, N>* Out) {
+  auto Buff = GetSysctlImp(Name);
+  if (!Buff) return false;
+  *Out = Buff.GetAsArray<Tp, N>();
+  return true;
+}
+#endif
+
+template <class ArgT>
+bool ReadFromFile(std::string const& fname, ArgT* arg) {
+  *arg = ArgT();
+  std::ifstream f(fname.c_str());
+  if (!f.is_open()) return false;
+  f >> *arg;
+  return f.good();
+}
+
+CPUInfo::Scaling CpuScaling(int num_cpus) {
+  // We don't have a valid CPU count, so don't even bother.
+  if (num_cpus <= 0) return CPUInfo::Scaling::UNKNOWN;
+#if defined(BENCHMARK_OS_QNX)
+  return CPUInfo::Scaling::UNKNOWN;
+#elif !defined(BENCHMARK_OS_WINDOWS)
+  // On Linux, the CPUfreq subsystem exposes CPU information as files on the
+  // local file system. If reading the exported files fails, then we may not be
+  // running on Linux, so we silently ignore all the read errors.
+  std::string res;
+  for (int cpu = 0; cpu < num_cpus; ++cpu) {
+    std::string governor_file =
+        StrCat("/sys/devices/system/cpu/cpu", cpu, "/cpufreq/scaling_governor");
+    if (ReadFromFile(governor_file, &res) && res != "performance")
+      return CPUInfo::Scaling::ENABLED;
+  }
+  return CPUInfo::Scaling::DISABLED;
+#else
+  return CPUInfo::Scaling::UNKNOWN;
+#endif
+}
+
+int CountSetBitsInCPUMap(std::string Val) {
+  auto CountBits = [](std::string Part) {
+    using CPUMask = std::bitset<sizeof(std::uintptr_t) * CHAR_BIT>;
+    Part = "0x" + Part;
+    CPUMask Mask(benchmark::stoul(Part, nullptr, 16));
+    return static_cast<int>(Mask.count());
+  };
+  size_t Pos;
+  int total = 0;
+  while ((Pos = Val.find(',')) != std::string::npos) {
+    total += CountBits(Val.substr(0, Pos));
+    Val = Val.substr(Pos + 1);
+  }
+  if (!Val.empty()) {
+    total += CountBits(Val);
+  }
+  return total;
+}
+
+BENCHMARK_MAYBE_UNUSED
+std::vector<CPUInfo::CacheInfo> GetCacheSizesFromKVFS() {
+  std::vector<CPUInfo::CacheInfo> res;
+  std::string dir = "/sys/devices/system/cpu/cpu0/cache/";
+  int Idx = 0;
+  while (true) {
+    CPUInfo::CacheInfo info;
+    std::string FPath = StrCat(dir, "index", Idx++, "/");
+    std::ifstream f(StrCat(FPath, "size").c_str());
+    if (!f.is_open()) break;
+    std::string suffix;
+    f >> info.size;
+    if (f.fail())
+      PrintErrorAndDie("Failed while reading file '", FPath, "size'");
+    if (f.good()) {
+      f >> suffix;
+      if (f.bad())
+        PrintErrorAndDie(
+            "Invalid cache size format: failed to read size suffix");
+      else if (f && suffix != "K")
+        PrintErrorAndDie("Invalid cache size format: Expected bytes ", suffix);
+      else if (suffix == "K")
+        info.size *= 1024;
+    }
+    if (!ReadFromFile(StrCat(FPath, "type"), &info.type))
+      PrintErrorAndDie("Failed to read from file ", FPath, "type");
+    if (!ReadFromFile(StrCat(FPath, "level"), &info.level))
+      PrintErrorAndDie("Failed to read from file ", FPath, "level");
+    std::string map_str;
+    if (!ReadFromFile(StrCat(FPath, "shared_cpu_map"), &map_str))
+      PrintErrorAndDie("Failed to read from file ", FPath, "shared_cpu_map");
+    info.num_sharing = CountSetBitsInCPUMap(map_str);
+    res.push_back(info);
+  }
+
+  return res;
+}
+
+#ifdef BENCHMARK_OS_MACOSX
+std::vector<CPUInfo::CacheInfo> GetCacheSizesMacOSX() {
+  std::vector<CPUInfo::CacheInfo> res;
+  std::array<uint64_t, 4> CacheCounts{{0, 0, 0, 0}};
+  GetSysctl("hw.cacheconfig", &CacheCounts);
+
+  struct {
+    std::string name;
+    std::string type;
+    int level;
+    uint64_t num_sharing;
+  } Cases[] = {{"hw.l1dcachesize", "Data", 1, CacheCounts[1]},
+               {"hw.l1icachesize", "Instruction", 1, CacheCounts[1]},
+               {"hw.l2cachesize", "Unified", 2, CacheCounts[2]},
+               {"hw.l3cachesize", "Unified", 3, CacheCounts[3]}};
+  for (auto& C : Cases) {
+    int val;
+    if (!GetSysctl(C.name, &val)) continue;
+    CPUInfo::CacheInfo info;
+    info.type = C.type;
+    info.level = C.level;
+    info.size = val;
+    info.num_sharing = static_cast<int>(C.num_sharing);
+    res.push_back(std::move(info));
+  }
+  return res;
+}
+#elif defined(BENCHMARK_OS_WINDOWS)
+std::vector<CPUInfo::CacheInfo> GetCacheSizesWindows() {
+  std::vector<CPUInfo::CacheInfo> res;
+  DWORD buffer_size = 0;
+  using PInfo = SYSTEM_LOGICAL_PROCESSOR_INFORMATION;
+  using CInfo = CACHE_DESCRIPTOR;
+
+  using UPtr = std::unique_ptr<PInfo, decltype(&std::free)>;
+  GetLogicalProcessorInformation(nullptr, &buffer_size);
+  UPtr buff((PInfo*)malloc(buffer_size), &std::free);
+  if (!GetLogicalProcessorInformation(buff.get(), &buffer_size))
+    PrintErrorAndDie("Failed during call to GetLogicalProcessorInformation: ",
+                     GetLastError());
+
+  PInfo* it = buff.get();
+  PInfo* end = buff.get() + (buffer_size / sizeof(PInfo));
+
+  for (; it != end; ++it) {
+    if (it->Relationship != RelationCache) continue;
+    using BitSet = std::bitset<sizeof(ULONG_PTR) * CHAR_BIT>;
+    BitSet B(it->ProcessorMask);
+    // To prevent duplicates, only consider caches where CPU 0 is specified
+    if (!B.test(0)) continue;
+    CInfo* Cache = &it->Cache;
+    CPUInfo::CacheInfo C;
+    C.num_sharing = static_cast<int>(B.count());
+    C.level = Cache->Level;
+    C.size = Cache->Size;
+    C.type = "Unknown";
+    switch (Cache->Type) {
+      case CacheUnified:
+        C.type = "Unified";
+        break;
+      case CacheInstruction:
+        C.type = "Instruction";
+        break;
+      case CacheData:
+        C.type = "Data";
+        break;
+      case CacheTrace:
+        C.type = "Trace";
+        break;
+    }
+    res.push_back(C);
+  }
+  return res;
+}
+#elif BENCHMARK_OS_QNX
+std::vector<CPUInfo::CacheInfo> GetCacheSizesQNX() {
+  std::vector<CPUInfo::CacheInfo> res;
+  struct cacheattr_entry* cache = SYSPAGE_ENTRY(cacheattr);
+  uint32_t const elsize = SYSPAGE_ELEMENT_SIZE(cacheattr);
+  int num = SYSPAGE_ENTRY_SIZE(cacheattr) / elsize;
+  for (int i = 0; i < num; ++i) {
+    CPUInfo::CacheInfo info;
+    switch (cache->flags) {
+      case CACHE_FLAG_INSTR:
+        info.type = "Instruction";
+        info.level = 1;
+        break;
+      case CACHE_FLAG_DATA:
+        info.type = "Data";
+        info.level = 1;
+        break;
+      case CACHE_FLAG_UNIFIED:
+        info.type = "Unified";
+        info.level = 2;
+        break;
+      case CACHE_FLAG_SHARED:
+        info.type = "Shared";
+        info.level = 3;
+        break;
+      default:
+        continue;
+        break;
+    }
+    info.size = cache->line_size * cache->num_lines;
+    info.num_sharing = 0;
+    res.push_back(std::move(info));
+    cache = SYSPAGE_ARRAY_ADJ_OFFSET(cacheattr, cache, elsize);
+  }
+  return res;
+}
+#endif
+
+std::vector<CPUInfo::CacheInfo> GetCacheSizes() {
+#ifdef BENCHMARK_OS_MACOSX
+  return GetCacheSizesMacOSX();
+#elif defined(BENCHMARK_OS_WINDOWS)
+  return GetCacheSizesWindows();
+#elif defined(BENCHMARK_OS_QNX)
+  return GetCacheSizesQNX();
+#else
+  return GetCacheSizesFromKVFS();
+#endif
+}
+
+std::string GetSystemName() {
+#if defined(BENCHMARK_OS_WINDOWS)
+  std::string str;
+  const unsigned COUNT = MAX_COMPUTERNAME_LENGTH + 1;
+  TCHAR hostname[COUNT] = {'\0'};
+  DWORD DWCOUNT = COUNT;
+  if (!GetComputerName(hostname, &DWCOUNT)) return std::string("");
+#ifndef UNICODE
+  str = std::string(hostname, DWCOUNT);
+#else
+  // Using wstring_convert, Is deprecated in C++17
+  using convert_type = std::codecvt_utf8<wchar_t>;
+  std::wstring_convert<convert_type, wchar_t> converter;
+  std::wstring wStr(hostname, DWCOUNT);
+  str = converter.to_bytes(wStr);
+#endif
+  return str;
+#else  // defined(BENCHMARK_OS_WINDOWS)
+#ifndef HOST_NAME_MAX
+#ifdef BENCHMARK_HAS_SYSCTL  // BSD/Mac Doesnt have HOST_NAME_MAX defined
+#define HOST_NAME_MAX 64
+#elif defined(BENCHMARK_OS_NACL)
+#define HOST_NAME_MAX 64
+#elif defined(BENCHMARK_OS_QNX)
+#define HOST_NAME_MAX 154
+#elif defined(BENCHMARK_OS_RTEMS)
+#define HOST_NAME_MAX 256
+#else
+#pragma message("HOST_NAME_MAX not defined. using 64")
+#define HOST_NAME_MAX 64
+#endif
+#endif  // def HOST_NAME_MAX
+  char hostname[HOST_NAME_MAX];
+  int retVal = gethostname(hostname, HOST_NAME_MAX);
+  if (retVal != 0) return std::string("");
+  return std::string(hostname);
+#endif  // Catch-all POSIX block.
+}
+
+int GetNumCPUs() {
+#ifdef BENCHMARK_HAS_SYSCTL
+  int NumCPU = -1;
+  if (GetSysctl("hw.ncpu", &NumCPU)) return NumCPU;
+  fprintf(stderr, "Err: %s\n", strerror(errno));
+  std::exit(EXIT_FAILURE);
+#elif defined(BENCHMARK_OS_WINDOWS)
+  SYSTEM_INFO sysinfo;
+  // Use memset as opposed to = {} to avoid GCC missing initializer false
+  // positives.
+  std::memset(&sysinfo, 0, sizeof(SYSTEM_INFO));
+  GetSystemInfo(&sysinfo);
+  return sysinfo.dwNumberOfProcessors;  // number of logical
+                                        // processors in the current
+                                        // group
+#elif defined(BENCHMARK_OS_SOLARIS)
+  // Returns -1 in case of a failure.
+  int NumCPU = sysconf(_SC_NPROCESSORS_ONLN);
+  if (NumCPU < 0) {
+    fprintf(stderr, "sysconf(_SC_NPROCESSORS_ONLN) failed with error: %s\n",
+            strerror(errno));
+  }
+  return NumCPU;
+#elif defined(BENCHMARK_OS_QNX)
+  return static_cast<int>(_syspage_ptr->num_cpu);
+#else
+  int NumCPUs = 0;
+  int MaxID = -1;
+  std::ifstream f("/proc/cpuinfo");
+  if (!f.is_open()) {
+    std::cerr << "failed to open /proc/cpuinfo\n";
+    return -1;
+  }
+  const std::string Key = "processor";
+  std::string ln;
+  while (std::getline(f, ln)) {
+    if (ln.empty()) continue;
+    size_t SplitIdx = ln.find(':');
+    std::string value;
+#if defined(__s390__)
+    // s390 has another format in /proc/cpuinfo
+    // it needs to be parsed differently
+    if (SplitIdx != std::string::npos)
+      value = ln.substr(Key.size() + 1, SplitIdx - Key.size() - 1);
+#else
+    if (SplitIdx != std::string::npos) value = ln.substr(SplitIdx + 1);
+#endif
+    if (ln.size() >= Key.size() && ln.compare(0, Key.size(), Key) == 0) {
+      NumCPUs++;
+      if (!value.empty()) {
+        int CurID = benchmark::stoi(value);
+        MaxID = std::max(CurID, MaxID);
+      }
+    }
+  }
+  if (f.bad()) {
+    std::cerr << "Failure reading /proc/cpuinfo\n";
+    return -1;
+  }
+  if (!f.eof()) {
+    std::cerr << "Failed to read to end of /proc/cpuinfo\n";
+    return -1;
+  }
+  f.close();
+
+  if ((MaxID + 1) != NumCPUs) {
+    fprintf(stderr,
+            "CPU ID assignments in /proc/cpuinfo seem messed up."
+            " This is usually caused by a bad BIOS.\n");
+  }
+  return NumCPUs;
+#endif
+  BENCHMARK_UNREACHABLE();
+}
+
+double GetCPUCyclesPerSecond(CPUInfo::Scaling scaling) {
+  // Currently, scaling is only used on linux path here,
+  // suppress diagnostics about it being unused on other paths.
+  (void)scaling;
+
+#if defined BENCHMARK_OS_LINUX || defined BENCHMARK_OS_CYGWIN
+  long freq;
+
+  // If the kernel is exporting the tsc frequency use that. There are issues
+  // where cpuinfo_max_freq cannot be relied on because the BIOS may be
+  // exporintg an invalid p-state (on x86) or p-states may be used to put the
+  // processor in a new mode (turbo mode). Essentially, those frequencies
+  // cannot always be relied upon. The same reasons apply to /proc/cpuinfo as
+  // well.
+  if (ReadFromFile("/sys/devices/system/cpu/cpu0/tsc_freq_khz", &freq)
+      // If CPU scaling is disabled, use the *current* frequency.
+      // Note that we specifically don't want to read cpuinfo_cur_freq,
+      // because it is only readable by root.
+      || (scaling == CPUInfo::Scaling::DISABLED &&
+          ReadFromFile("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq",
+                       &freq))
+      // Otherwise, if CPU scaling may be in effect, we want to use
+      // the *maximum* frequency, not whatever CPU speed some random processor
+      // happens to be using now.
+      || ReadFromFile("/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq",
+                      &freq)) {
+    // The value is in kHz (as the file name suggests).  For example, on a
+    // 2GHz warpstation, the file contains the value "2000000".
+    return freq * 1000.0;
+  }
+
+  const double error_value = -1;
+  double bogo_clock = error_value;
+
+  std::ifstream f("/proc/cpuinfo");
+  if (!f.is_open()) {
+    std::cerr << "failed to open /proc/cpuinfo\n";
+    return error_value;
+  }
+
+  auto startsWithKey = [](std::string const& Value, std::string const& Key) {
+    if (Key.size() > Value.size()) return false;
+    auto Cmp = [&](char X, char Y) {
+      return std::tolower(X) == std::tolower(Y);
+    };
+    return std::equal(Key.begin(), Key.end(), Value.begin(), Cmp);
+  };
+
+  std::string ln;
+  while (std::getline(f, ln)) {
+    if (ln.empty()) continue;
+    size_t SplitIdx = ln.find(':');
+    std::string value;
+    if (SplitIdx != std::string::npos) value = ln.substr(SplitIdx + 1);
+    // When parsing the "cpu MHz" and "bogomips" (fallback) entries, we only
+    // accept positive values. Some environments (virtual machines) report zero,
+    // which would cause infinite looping in WallTime_Init.
+    if (startsWithKey(ln, "cpu MHz")) {
+      if (!value.empty()) {
+        double cycles_per_second = benchmark::stod(value) * 1000000.0;
+        if (cycles_per_second > 0) return cycles_per_second;
+      }
+    } else if (startsWithKey(ln, "bogomips")) {
+      if (!value.empty()) {
+        bogo_clock = benchmark::stod(value) * 1000000.0;
+        if (bogo_clock < 0.0) bogo_clock = error_value;
+      }
+    }
+  }
+  if (f.bad()) {
+    std::cerr << "Failure reading /proc/cpuinfo\n";
+    return error_value;
+  }
+  if (!f.eof()) {
+    std::cerr << "Failed to read to end of /proc/cpuinfo\n";
+    return error_value;
+  }
+  f.close();
+  // If we found the bogomips clock, but nothing better, we'll use it (but
+  // we're not happy about it); otherwise, fallback to the rough estimation
+  // below.
+  if (bogo_clock >= 0.0) return bogo_clock;
+
+#elif defined BENCHMARK_HAS_SYSCTL
+  constexpr auto* FreqStr =
+#if defined(BENCHMARK_OS_FREEBSD) || defined(BENCHMARK_OS_NETBSD)
+      "machdep.tsc_freq";
+#elif defined BENCHMARK_OS_OPENBSD
+      "hw.cpuspeed";
+#elif defined BENCHMARK_OS_DRAGONFLY
+      "hw.tsc_frequency";
+#else
+      "hw.cpufrequency";
+#endif
+  unsigned long long hz = 0;
+#if defined BENCHMARK_OS_OPENBSD
+  if (GetSysctl(FreqStr, &hz)) return hz * 1000000;
+#else
+  if (GetSysctl(FreqStr, &hz)) return hz;
+#endif
+  fprintf(stderr, "Unable to determine clock rate from sysctl: %s: %s\n",
+          FreqStr, strerror(errno));
+
+#elif defined BENCHMARK_OS_WINDOWS
+  // In NT, read MHz from the registry. If we fail to do so or we're in win9x
+  // then make a crude estimate.
+  DWORD data, data_size = sizeof(data);
+  if (IsWindowsXPOrGreater() &&
+      SUCCEEDED(
+          SHGetValueA(HKEY_LOCAL_MACHINE,
+                      "HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0",
+                      "~MHz", nullptr, &data, &data_size)))
+    return static_cast<double>((int64_t)data *
+                               (int64_t)(1000 * 1000));  // was mhz
+#elif defined(BENCHMARK_OS_SOLARIS)
+  kstat_ctl_t* kc = kstat_open();
+  if (!kc) {
+    std::cerr << "failed to open /dev/kstat\n";
+    return -1;
+  }
+  kstat_t* ksp = kstat_lookup(kc, (char*)"cpu_info", -1, (char*)"cpu_info0");
+  if (!ksp) {
+    std::cerr << "failed to lookup in /dev/kstat\n";
+    return -1;
+  }
+  if (kstat_read(kc, ksp, NULL) < 0) {
+    std::cerr << "failed to read from /dev/kstat\n";
+    return -1;
+  }
+  kstat_named_t* knp =
+      (kstat_named_t*)kstat_data_lookup(ksp, (char*)"current_clock_Hz");
+  if (!knp) {
+    std::cerr << "failed to lookup data in /dev/kstat\n";
+    return -1;
+  }
+  if (knp->data_type != KSTAT_DATA_UINT64) {
+    std::cerr << "current_clock_Hz is of unexpected data type: "
+              << knp->data_type << "\n";
+    return -1;
+  }
+  double clock_hz = knp->value.ui64;
+  kstat_close(kc);
+  return clock_hz;
+#elif defined(BENCHMARK_OS_QNX)
+  return static_cast<double>((int64_t)(SYSPAGE_ENTRY(cpuinfo)->speed) *
+                             (int64_t)(1000 * 1000));
+#endif
+  // If we've fallen through, attempt to roughly estimate the CPU clock rate.
+  const int estimate_time_ms = 1000;
+  const auto start_ticks = cycleclock::Now();
+  SleepForMilliseconds(estimate_time_ms);
+  return static_cast<double>(cycleclock::Now() - start_ticks);
+}
+
+std::vector<double> GetLoadAvg() {
+#if (defined BENCHMARK_OS_FREEBSD || defined(BENCHMARK_OS_LINUX) ||     \
+     defined BENCHMARK_OS_MACOSX || defined BENCHMARK_OS_NETBSD ||      \
+     defined BENCHMARK_OS_OPENBSD || defined BENCHMARK_OS_DRAGONFLY) && \
+    !defined(__ANDROID__)
+  constexpr int kMaxSamples = 3;
+  std::vector<double> res(kMaxSamples, 0.0);
+  const int nelem = getloadavg(res.data(), kMaxSamples);
+  if (nelem < 1) {
+    res.clear();
+  } else {
+    res.resize(nelem);
+  }
+  return res;
+#else
+  return {};
+#endif
+}
+
+}  // end namespace
+
+const CPUInfo& CPUInfo::Get() {
+  static const CPUInfo* info = new CPUInfo();
+  return *info;
+}
+
+CPUInfo::CPUInfo()
+    : num_cpus(GetNumCPUs()),
+      scaling(CpuScaling(num_cpus)),
+      cycles_per_second(GetCPUCyclesPerSecond(scaling)),
+      caches(GetCacheSizes()),
+      load_avg(GetLoadAvg()) {}
+
+const SystemInfo& SystemInfo::Get() {
+  static const SystemInfo* info = new SystemInfo();
+  return *info;
+}
+
+SystemInfo::SystemInfo() : name(GetSystemName()) {}
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/thread_manager.h b/3rdparty/benchmark/src/thread_manager.h
new file mode 100644
index 00000000..46802850
--- /dev/null
+++ b/3rdparty/benchmark/src/thread_manager.h
@@ -0,0 +1,63 @@
+#ifndef BENCHMARK_THREAD_MANAGER_H
+#define BENCHMARK_THREAD_MANAGER_H
+
+#include <atomic>
+
+#include "benchmark/benchmark.h"
+#include "mutex.h"
+
+namespace benchmark {
+namespace internal {
+
+class ThreadManager {
+ public:
+  explicit ThreadManager(int num_threads)
+      : alive_threads_(num_threads), start_stop_barrier_(num_threads) {}
+
+  Mutex& GetBenchmarkMutex() const RETURN_CAPABILITY(benchmark_mutex_) {
+    return benchmark_mutex_;
+  }
+
+  bool StartStopBarrier() EXCLUDES(end_cond_mutex_) {
+    return start_stop_barrier_.wait();
+  }
+
+  void NotifyThreadComplete() EXCLUDES(end_cond_mutex_) {
+    start_stop_barrier_.removeThread();
+    if (--alive_threads_ == 0) {
+      MutexLock lock(end_cond_mutex_);
+      end_condition_.notify_all();
+    }
+  }
+
+  void WaitForAllThreads() EXCLUDES(end_cond_mutex_) {
+    MutexLock lock(end_cond_mutex_);
+    end_condition_.wait(lock.native_handle(),
+                        [this]() { return alive_threads_ == 0; });
+  }
+
+  struct Result {
+    IterationCount iterations = 0;
+    double real_time_used = 0;
+    double cpu_time_used = 0;
+    double manual_time_used = 0;
+    int64_t complexity_n = 0;
+    std::string report_label_;
+    std::string error_message_;
+    bool has_error_ = false;
+    UserCounters counters;
+  };
+  GUARDED_BY(GetBenchmarkMutex()) Result results;
+
+ private:
+  mutable Mutex benchmark_mutex_;
+  std::atomic<int> alive_threads_;
+  Barrier start_stop_barrier_;
+  Mutex end_cond_mutex_;
+  Condition end_condition_;
+};
+
+}  // namespace internal
+}  // namespace benchmark
+
+#endif  // BENCHMARK_THREAD_MANAGER_H
diff --git a/3rdparty/benchmark/src/thread_timer.h b/3rdparty/benchmark/src/thread_timer.h
new file mode 100644
index 00000000..eb23f595
--- /dev/null
+++ b/3rdparty/benchmark/src/thread_timer.h
@@ -0,0 +1,86 @@
+#ifndef BENCHMARK_THREAD_TIMER_H
+#define BENCHMARK_THREAD_TIMER_H
+
+#include "check.h"
+#include "timers.h"
+
+namespace benchmark {
+namespace internal {
+
+class ThreadTimer {
+  explicit ThreadTimer(bool measure_process_cpu_time_)
+      : measure_process_cpu_time(measure_process_cpu_time_) {}
+
+ public:
+  static ThreadTimer Create() {
+    return ThreadTimer(/*measure_process_cpu_time_=*/false);
+  }
+  static ThreadTimer CreateProcessCpuTime() {
+    return ThreadTimer(/*measure_process_cpu_time_=*/true);
+  }
+
+  // Called by each thread
+  void StartTimer() {
+    running_ = true;
+    start_real_time_ = ChronoClockNow();
+    start_cpu_time_ = ReadCpuTimerOfChoice();
+  }
+
+  // Called by each thread
+  void StopTimer() {
+    BM_CHECK(running_);
+    running_ = false;
+    real_time_used_ += ChronoClockNow() - start_real_time_;
+    // Floating point error can result in the subtraction producing a negative
+    // time. Guard against that.
+    cpu_time_used_ +=
+        std::max<double>(ReadCpuTimerOfChoice() - start_cpu_time_, 0);
+  }
+
+  // Called by each thread
+  void SetIterationTime(double seconds) { manual_time_used_ += seconds; }
+
+  bool running() const { return running_; }
+
+  // REQUIRES: timer is not running
+  double real_time_used() const {
+    BM_CHECK(!running_);
+    return real_time_used_;
+  }
+
+  // REQUIRES: timer is not running
+  double cpu_time_used() const {
+    BM_CHECK(!running_);
+    return cpu_time_used_;
+  }
+
+  // REQUIRES: timer is not running
+  double manual_time_used() const {
+    BM_CHECK(!running_);
+    return manual_time_used_;
+  }
+
+ private:
+  double ReadCpuTimerOfChoice() const {
+    if (measure_process_cpu_time) return ProcessCPUUsage();
+    return ThreadCPUUsage();
+  }
+
+  // should the thread, or the process, time be measured?
+  const bool measure_process_cpu_time;
+
+  bool running_ = false;        // Is the timer running
+  double start_real_time_ = 0;  // If running_
+  double start_cpu_time_ = 0;   // If running_
+
+  // Accumulated time so far (does not contain current slice if running_)
+  double real_time_used_ = 0;
+  double cpu_time_used_ = 0;
+  // Manually set iteration time. User sets this with SetIterationTime(seconds).
+  double manual_time_used_ = 0;
+};
+
+}  // namespace internal
+}  // namespace benchmark
+
+#endif  // BENCHMARK_THREAD_TIMER_H
diff --git a/3rdparty/benchmark/src/timers.cc b/3rdparty/benchmark/src/timers.cc
new file mode 100644
index 00000000..21d3db20
--- /dev/null
+++ b/3rdparty/benchmark/src/timers.cc
@@ -0,0 +1,259 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "timers.h"
+
+#include "internal_macros.h"
+
+#ifdef BENCHMARK_OS_WINDOWS
+#include <shlwapi.h>
+#undef StrCat  // Don't let StrCat in string_util.h be renamed to lstrcatA
+#include <versionhelpers.h>
+#include <windows.h>
+#else
+#include <fcntl.h>
+#ifndef BENCHMARK_OS_FUCHSIA
+#include <sys/resource.h>
+#endif
+#include <sys/time.h>
+#include <sys/types.h>  // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
+#include <unistd.h>
+#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_DRAGONFLY || \
+    defined BENCHMARK_OS_MACOSX
+#include <sys/sysctl.h>
+#endif
+#if defined(BENCHMARK_OS_MACOSX)
+#include <mach/mach_init.h>
+#include <mach/mach_port.h>
+#include <mach/thread_act.h>
+#endif
+#endif
+
+#ifdef BENCHMARK_OS_EMSCRIPTEN
+#include <emscripten.h>
+#endif
+
+#include <cerrno>
+#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <iostream>
+#include <limits>
+#include <mutex>
+
+#include "check.h"
+#include "log.h"
+#include "sleep.h"
+#include "string_util.h"
+
+namespace benchmark {
+
+// Suppress unused warnings on helper functions.
+#if defined(__GNUC__)
+#pragma GCC diagnostic ignored "-Wunused-function"
+#endif
+
+namespace {
+#if defined(BENCHMARK_OS_WINDOWS)
+double MakeTime(FILETIME const& kernel_time, FILETIME const& user_time) {
+  ULARGE_INTEGER kernel;
+  ULARGE_INTEGER user;
+  kernel.HighPart = kernel_time.dwHighDateTime;
+  kernel.LowPart = kernel_time.dwLowDateTime;
+  user.HighPart = user_time.dwHighDateTime;
+  user.LowPart = user_time.dwLowDateTime;
+  return (static_cast<double>(kernel.QuadPart) +
+          static_cast<double>(user.QuadPart)) *
+         1e-7;
+}
+#elif !defined(BENCHMARK_OS_FUCHSIA)
+double MakeTime(struct rusage const& ru) {
+  return (static_cast<double>(ru.ru_utime.tv_sec) +
+          static_cast<double>(ru.ru_utime.tv_usec) * 1e-6 +
+          static_cast<double>(ru.ru_stime.tv_sec) +
+          static_cast<double>(ru.ru_stime.tv_usec) * 1e-6);
+}
+#endif
+#if defined(BENCHMARK_OS_MACOSX)
+double MakeTime(thread_basic_info_data_t const& info) {
+  return (static_cast<double>(info.user_time.seconds) +
+          static_cast<double>(info.user_time.microseconds) * 1e-6 +
+          static_cast<double>(info.system_time.seconds) +
+          static_cast<double>(info.system_time.microseconds) * 1e-6);
+}
+#endif
+#if defined(CLOCK_PROCESS_CPUTIME_ID) || defined(CLOCK_THREAD_CPUTIME_ID)
+double MakeTime(struct timespec const& ts) {
+  return ts.tv_sec + (static_cast<double>(ts.tv_nsec) * 1e-9);
+}
+#endif
+
+BENCHMARK_NORETURN static void DiagnoseAndExit(const char* msg) {
+  std::cerr << "ERROR: " << msg << std::endl;
+  std::exit(EXIT_FAILURE);
+}
+
+}  // end namespace
+
+double ProcessCPUUsage() {
+#if defined(BENCHMARK_OS_WINDOWS)
+  HANDLE proc = GetCurrentProcess();
+  FILETIME creation_time;
+  FILETIME exit_time;
+  FILETIME kernel_time;
+  FILETIME user_time;
+  if (GetProcessTimes(proc, &creation_time, &exit_time, &kernel_time,
+                      &user_time))
+    return MakeTime(kernel_time, user_time);
+  DiagnoseAndExit("GetProccessTimes() failed");
+#elif defined(BENCHMARK_OS_EMSCRIPTEN)
+  // clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) returns 0 on Emscripten.
+  // Use Emscripten-specific API. Reported CPU time would be exactly the
+  // same as total time, but this is ok because there aren't long-latency
+  // syncronous system calls in Emscripten.
+  return emscripten_get_now() * 1e-3;
+#elif defined(CLOCK_PROCESS_CPUTIME_ID) && !defined(BENCHMARK_OS_MACOSX)
+  // FIXME We want to use clock_gettime, but its not available in MacOS 10.11.
+  // See https://github.com/google/benchmark/pull/292
+  struct timespec spec;
+  if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &spec) == 0)
+    return MakeTime(spec);
+  DiagnoseAndExit("clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) failed");
+#else
+  struct rusage ru;
+  if (getrusage(RUSAGE_SELF, &ru) == 0) return MakeTime(ru);
+  DiagnoseAndExit("getrusage(RUSAGE_SELF, ...) failed");
+#endif
+}
+
+double ThreadCPUUsage() {
+#if defined(BENCHMARK_OS_WINDOWS)
+  HANDLE this_thread = GetCurrentThread();
+  FILETIME creation_time;
+  FILETIME exit_time;
+  FILETIME kernel_time;
+  FILETIME user_time;
+  GetThreadTimes(this_thread, &creation_time, &exit_time, &kernel_time,
+                 &user_time);
+  return MakeTime(kernel_time, user_time);
+#elif defined(BENCHMARK_OS_MACOSX)
+  // FIXME We want to use clock_gettime, but its not available in MacOS 10.11.
+  // See https://github.com/google/benchmark/pull/292
+  mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
+  thread_basic_info_data_t info;
+  mach_port_t thread = pthread_mach_thread_np(pthread_self());
+  if (thread_info(thread, THREAD_BASIC_INFO,
+                  reinterpret_cast<thread_info_t>(&info),
+                  &count) == KERN_SUCCESS) {
+    return MakeTime(info);
+  }
+  DiagnoseAndExit("ThreadCPUUsage() failed when evaluating thread_info");
+#elif defined(BENCHMARK_OS_EMSCRIPTEN)
+  // Emscripten doesn't support traditional threads
+  return ProcessCPUUsage();
+#elif defined(BENCHMARK_OS_RTEMS)
+  // RTEMS doesn't support CLOCK_THREAD_CPUTIME_ID. See
+  // https://github.com/RTEMS/rtems/blob/master/cpukit/posix/src/clockgettime.c
+  return ProcessCPUUsage();
+#elif defined(BENCHMARK_OS_SOLARIS)
+  struct rusage ru;
+  if (getrusage(RUSAGE_LWP, &ru) == 0) return MakeTime(ru);
+  DiagnoseAndExit("getrusage(RUSAGE_LWP, ...) failed");
+#elif defined(CLOCK_THREAD_CPUTIME_ID)
+  struct timespec ts;
+  if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) == 0) return MakeTime(ts);
+  DiagnoseAndExit("clock_gettime(CLOCK_THREAD_CPUTIME_ID, ...) failed");
+#else
+#error Per-thread timing is not available on your system.
+#endif
+}
+
+std::string LocalDateTimeString() {
+  // Write the local time in RFC3339 format yyyy-mm-ddTHH:MM:SS+/-HH:MM.
+  typedef std::chrono::system_clock Clock;
+  std::time_t now = Clock::to_time_t(Clock::now());
+  const std::size_t kTzOffsetLen = 6;
+  const std::size_t kTimestampLen = 19;
+
+  std::size_t tz_len;
+  std::size_t timestamp_len;
+  long int offset_minutes;
+  char tz_offset_sign = '+';
+  // tz_offset is set in one of three ways:
+  // * strftime with %z - This either returns empty or the ISO 8601 time.  The
+  // maximum length an
+  //   ISO 8601 string can be is 7 (e.g. -03:30, plus trailing zero).
+  // * snprintf with %c%02li:%02li - The maximum length is 41 (one for %c, up to
+  // 19 for %02li,
+  //   one for :, up to 19 %02li, plus trailing zero).
+  // * A fixed string of "-00:00".  The maximum length is 7 (-00:00, plus
+  // trailing zero).
+  //
+  // Thus, the maximum size this needs to be is 41.
+  char tz_offset[41];
+  // Long enough buffer to avoid format-overflow warnings
+  char storage[128];
+
+#if defined(BENCHMARK_OS_WINDOWS)
+  std::tm* timeinfo_p = ::localtime(&now);
+#else
+  std::tm timeinfo;
+  std::tm* timeinfo_p = &timeinfo;
+  ::localtime_r(&now, &timeinfo);
+#endif
+
+  tz_len = std::strftime(tz_offset, sizeof(tz_offset), "%z", timeinfo_p);
+
+  if (tz_len < kTzOffsetLen && tz_len > 1) {
+    // Timezone offset was written. strftime writes offset as +HHMM or -HHMM,
+    // RFC3339 specifies an offset as +HH:MM or -HH:MM. To convert, we parse
+    // the offset as an integer, then reprint it to a string.
+
+    offset_minutes = ::strtol(tz_offset, NULL, 10);
+    if (offset_minutes < 0) {
+      offset_minutes *= -1;
+      tz_offset_sign = '-';
+    }
+
+    tz_len =
+        ::snprintf(tz_offset, sizeof(tz_offset), "%c%02li:%02li",
+                   tz_offset_sign, offset_minutes / 100, offset_minutes % 100);
+    BM_CHECK(tz_len == kTzOffsetLen);
+    ((void)tz_len);  // Prevent unused variable warning in optimized build.
+  } else {
+    // Unknown offset. RFC3339 specifies that unknown local offsets should be
+    // written as UTC time with -00:00 timezone.
+#if defined(BENCHMARK_OS_WINDOWS)
+    // Potential race condition if another thread calls localtime or gmtime.
+    timeinfo_p = ::gmtime(&now);
+#else
+    ::gmtime_r(&now, &timeinfo);
+#endif
+
+    strncpy(tz_offset, "-00:00", kTzOffsetLen + 1);
+  }
+
+  timestamp_len =
+      std::strftime(storage, sizeof(storage), "%Y-%m-%dT%H:%M:%S", timeinfo_p);
+  BM_CHECK(timestamp_len == kTimestampLen);
+  // Prevent unused variable warning in optimized build.
+  ((void)kTimestampLen);
+
+  std::strncat(storage, tz_offset, sizeof(storage) - timestamp_len - 1);
+  return std::string(storage);
+}
+
+}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/timers.h b/3rdparty/benchmark/src/timers.h
new file mode 100644
index 00000000..65606ccd
--- /dev/null
+++ b/3rdparty/benchmark/src/timers.h
@@ -0,0 +1,48 @@
+#ifndef BENCHMARK_TIMERS_H
+#define BENCHMARK_TIMERS_H
+
+#include <chrono>
+#include <string>
+
+namespace benchmark {
+
+// Return the CPU usage of the current process
+double ProcessCPUUsage();
+
+// Return the CPU usage of the children of the current process
+double ChildrenCPUUsage();
+
+// Return the CPU usage of the current thread
+double ThreadCPUUsage();
+
+#if defined(HAVE_STEADY_CLOCK)
+template <bool HighResIsSteady = std::chrono::high_resolution_clock::is_steady>
+struct ChooseSteadyClock {
+  typedef std::chrono::high_resolution_clock type;
+};
+
+template <>
+struct ChooseSteadyClock<false> {
+  typedef std::chrono::steady_clock type;
+};
+#endif
+
+struct ChooseClockType {
+#if defined(HAVE_STEADY_CLOCK)
+  typedef ChooseSteadyClock<>::type type;
+#else
+  typedef std::chrono::high_resolution_clock type;
+#endif
+};
+
+inline double ChronoClockNow() {
+  typedef ChooseClockType::type ClockType;
+  using FpSeconds = std::chrono::duration<double, std::chrono::seconds::period>;
+  return FpSeconds(ClockType::now().time_since_epoch()).count();
+}
+
+std::string LocalDateTimeString();
+
+}  // end namespace benchmark
+
+#endif  // BENCHMARK_TIMERS_H
diff --git a/3rdparty/benchmark/test/AssemblyTests.cmake b/3rdparty/benchmark/test/AssemblyTests.cmake
new file mode 100644
index 00000000..3d078586
--- /dev/null
+++ b/3rdparty/benchmark/test/AssemblyTests.cmake
@@ -0,0 +1,46 @@
+
+include(split_list)
+
+set(ASM_TEST_FLAGS "")
+check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
+if (BENCHMARK_HAS_O3_FLAG)
+  list(APPEND ASM_TEST_FLAGS -O3)
+endif()
+
+check_cxx_compiler_flag(-g0 BENCHMARK_HAS_G0_FLAG)
+if (BENCHMARK_HAS_G0_FLAG)
+  list(APPEND ASM_TEST_FLAGS -g0)
+endif()
+
+check_cxx_compiler_flag(-fno-stack-protector BENCHMARK_HAS_FNO_STACK_PROTECTOR_FLAG)
+if (BENCHMARK_HAS_FNO_STACK_PROTECTOR_FLAG)
+  list(APPEND ASM_TEST_FLAGS -fno-stack-protector)
+endif()
+
+split_list(ASM_TEST_FLAGS)
+string(TOUPPER "${CMAKE_CXX_COMPILER_ID}" ASM_TEST_COMPILER)
+
+macro(add_filecheck_test name)
+  cmake_parse_arguments(ARG "" "" "CHECK_PREFIXES" ${ARGV})
+  add_library(${name} OBJECT ${name}.cc)
+  set_target_properties(${name} PROPERTIES COMPILE_FLAGS "-S ${ASM_TEST_FLAGS}")
+  set(ASM_OUTPUT_FILE "${CMAKE_CURRENT_BINARY_DIR}/${name}.s")
+  add_custom_target(copy_${name} ALL
+      COMMAND ${PROJECT_SOURCE_DIR}/tools/strip_asm.py
+        $<TARGET_OBJECTS:${name}>
+        ${ASM_OUTPUT_FILE}
+      BYPRODUCTS ${ASM_OUTPUT_FILE})
+  add_dependencies(copy_${name} ${name})
+  if (NOT ARG_CHECK_PREFIXES)
+    set(ARG_CHECK_PREFIXES "CHECK")
+  endif()
+  foreach(prefix ${ARG_CHECK_PREFIXES})
+    add_test(NAME run_${name}_${prefix}
+        COMMAND
+          ${LLVM_FILECHECK_EXE} ${name}.cc
+          --input-file=${ASM_OUTPUT_FILE}
+          --check-prefixes=CHECK,CHECK-${ASM_TEST_COMPILER}
+        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
+  endforeach()
+endmacro()
+
diff --git a/3rdparty/benchmark/test/BUILD b/3rdparty/benchmark/test/BUILD
new file mode 100644
index 00000000..df700a7a
--- /dev/null
+++ b/3rdparty/benchmark/test/BUILD
@@ -0,0 +1,75 @@
+TEST_COPTS = [
+    "-pedantic",
+    "-pedantic-errors",
+    "-std=c++11",
+    "-Wall",
+    "-Wextra",
+    "-Wshadow",
+    #    "-Wshorten-64-to-32",
+    "-Wfloat-equal",
+    "-fstrict-aliasing",
+]
+
+PER_SRC_COPTS = ({
+    "cxx03_test.cc": ["-std=c++03"],
+    # Some of the issues with DoNotOptimize only occur when optimization is enabled
+    "donotoptimize_test.cc": ["-O3"],
+})
+
+TEST_ARGS = ["--benchmark_min_time=0.01"]
+
+PER_SRC_TEST_ARGS = ({
+    "user_counters_tabular_test.cc": ["--benchmark_counters_tabular=true"],
+    "repetitions_test.cc": [" --benchmark_repetitions=3"],
+    "spec_arg_test.cc" : ["--benchmark_filter=BM_NotChosen"],
+})
+
+load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
+
+cc_library(
+    name = "output_test_helper",
+    testonly = 1,
+    srcs = ["output_test_helper.cc"],
+    hdrs = ["output_test.h"],
+    copts = TEST_COPTS,
+    deps = [
+        "//:benchmark",
+        "//:benchmark_internal_headers",
+    ],
+)
+
+[
+    cc_test(
+        name = test_src[:-len(".cc")],
+        size = "small",
+        srcs = [test_src],
+        args = TEST_ARGS + PER_SRC_TEST_ARGS.get(test_src, []),
+        copts = TEST_COPTS + PER_SRC_COPTS.get(test_src, []),
+        deps = [
+            ":output_test_helper",
+            "//:benchmark",
+            "//:benchmark_internal_headers",
+            "@com_google_googletest//:gtest",
+        ] + (
+            ["@com_google_googletest//:gtest_main"] if (test_src[-len("gtest.cc"):] == "gtest.cc") else []
+        ),
+        # FIXME: Add support for assembly tests to bazel.
+        # See Issue #556
+        # https://github.com/google/benchmark/issues/556
+    )
+    for test_src in glob(
+        ["*test.cc"],
+        exclude = [
+            "*_assembly_test.cc",
+            "link_main_test.cc",
+        ],
+    )
+]
+
+cc_test(
+    name = "link_main_test",
+    size = "small",
+    srcs = ["link_main_test.cc"],
+    copts = TEST_COPTS,
+    deps = ["//:benchmark_main"],
+)
diff --git a/3rdparty/benchmark/test/CMakeLists.txt b/3rdparty/benchmark/test/CMakeLists.txt
new file mode 100644
index 00000000..162af53f
--- /dev/null
+++ b/3rdparty/benchmark/test/CMakeLists.txt
@@ -0,0 +1,277 @@
+# Enable the tests
+
+find_package(Threads REQUIRED)
+include(CheckCXXCompilerFlag)
+
+# NOTE: Some tests use `<cassert>` to perform the test. Therefore we must
+# strip -DNDEBUG from the default CMake flags in DEBUG mode.
+string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
+if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
+  add_definitions( -UNDEBUG )
+  add_definitions(-DTEST_BENCHMARK_LIBRARY_HAS_NO_ASSERTIONS)
+  # Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
+  foreach (flags_var_to_scrub
+      CMAKE_CXX_FLAGS_RELEASE
+      CMAKE_CXX_FLAGS_RELWITHDEBINFO
+      CMAKE_CXX_FLAGS_MINSIZEREL
+      CMAKE_C_FLAGS_RELEASE
+      CMAKE_C_FLAGS_RELWITHDEBINFO
+      CMAKE_C_FLAGS_MINSIZEREL)
+    string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " "
+      "${flags_var_to_scrub}" "${${flags_var_to_scrub}}")
+  endforeach()
+endif()
+
+check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
+set(BENCHMARK_O3_FLAG "")
+if (BENCHMARK_HAS_O3_FLAG)
+  set(BENCHMARK_O3_FLAG "-O3")
+endif()
+
+# NOTE: These flags must be added after find_package(Threads REQUIRED) otherwise
+# they will break the configuration check.
+if (DEFINED BENCHMARK_CXX_LINKER_FLAGS)
+  list(APPEND CMAKE_EXE_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
+endif()
+
+add_library(output_test_helper STATIC output_test_helper.cc output_test.h)
+
+macro(compile_benchmark_test name)
+  add_executable(${name} "${name}.cc")
+  target_link_libraries(${name} benchmark::benchmark ${CMAKE_THREAD_LIBS_INIT})
+endmacro(compile_benchmark_test)
+
+macro(compile_benchmark_test_with_main name)
+  add_executable(${name} "${name}.cc")
+  target_link_libraries(${name} benchmark::benchmark_main)
+endmacro(compile_benchmark_test_with_main)
+
+macro(compile_output_test name)
+  add_executable(${name} "${name}.cc" output_test.h)
+  target_link_libraries(${name} output_test_helper benchmark::benchmark
+          ${BENCHMARK_CXX_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
+endmacro(compile_output_test)
+
+# Demonstration executable
+compile_benchmark_test(benchmark_test)
+add_test(NAME benchmark COMMAND benchmark_test --benchmark_min_time=0.01)
+
+compile_benchmark_test(spec_arg_test)
+add_test(NAME spec_arg COMMAND spec_arg_test --benchmark_filter=BM_NotChosen)
+
+compile_benchmark_test(benchmark_setup_teardown_test)
+add_test(NAME benchmark_setup_teardown COMMAND benchmark_setup_teardown_test)
+
+compile_benchmark_test(filter_test)
+macro(add_filter_test name filter expect)
+  add_test(NAME ${name} COMMAND filter_test --benchmark_min_time=0.01 --benchmark_filter=${filter} ${expect})
+  add_test(NAME ${name}_list_only COMMAND filter_test --benchmark_list_tests --benchmark_filter=${filter} ${expect})
+endmacro(add_filter_test)
+
+add_filter_test(filter_simple "Foo" 3)
+add_filter_test(filter_simple_negative "-Foo" 2)
+add_filter_test(filter_suffix "BM_.*" 4)
+add_filter_test(filter_suffix_negative "-BM_.*" 1)
+add_filter_test(filter_regex_all ".*" 5)
+add_filter_test(filter_regex_all_negative "-.*" 0)
+add_filter_test(filter_regex_blank "" 5)
+add_filter_test(filter_regex_blank_negative "-" 0)
+add_filter_test(filter_regex_none "monkey" 0)
+add_filter_test(filter_regex_none_negative "-monkey" 5)
+add_filter_test(filter_regex_wildcard ".*Foo.*" 3)
+add_filter_test(filter_regex_wildcard_negative "-.*Foo.*" 2)
+add_filter_test(filter_regex_begin "^BM_.*" 4)
+add_filter_test(filter_regex_begin_negative "-^BM_.*" 1)
+add_filter_test(filter_regex_begin2 "^N" 1)
+add_filter_test(filter_regex_begin2_negative "-^N" 4)
+add_filter_test(filter_regex_end ".*Ba$" 1)
+add_filter_test(filter_regex_end_negative "-.*Ba$" 4)
+
+compile_benchmark_test(options_test)
+add_test(NAME options_benchmarks COMMAND options_test --benchmark_min_time=0.01)
+
+compile_benchmark_test(basic_test)
+add_test(NAME basic_benchmark COMMAND basic_test --benchmark_min_time=0.01)
+
+compile_output_test(repetitions_test)
+add_test(NAME repetitions_benchmark COMMAND repetitions_test --benchmark_min_time=0.01 --benchmark_repetitions=3)
+
+compile_benchmark_test(diagnostics_test)
+add_test(NAME diagnostics_test COMMAND diagnostics_test --benchmark_min_time=0.01)
+
+compile_benchmark_test(skip_with_error_test)
+add_test(NAME skip_with_error_test COMMAND skip_with_error_test --benchmark_min_time=0.01)
+
+compile_benchmark_test(donotoptimize_test)
+# Some of the issues with DoNotOptimize only occur when optimization is enabled
+check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
+if (BENCHMARK_HAS_O3_FLAG)
+  set_target_properties(donotoptimize_test PROPERTIES COMPILE_FLAGS "-O3")
+endif()
+add_test(NAME donotoptimize_test COMMAND donotoptimize_test --benchmark_min_time=0.01)
+
+compile_benchmark_test(fixture_test)
+add_test(NAME fixture_test COMMAND fixture_test --benchmark_min_time=0.01)
+
+compile_benchmark_test(register_benchmark_test)
+add_test(NAME register_benchmark_test COMMAND register_benchmark_test --benchmark_min_time=0.01)
+
+compile_benchmark_test(map_test)
+add_test(NAME map_test COMMAND map_test --benchmark_min_time=0.01)
+
+compile_benchmark_test(multiple_ranges_test)
+add_test(NAME multiple_ranges_test COMMAND multiple_ranges_test --benchmark_min_time=0.01)
+
+compile_benchmark_test(args_product_test)
+add_test(NAME args_product_test COMMAND args_product_test --benchmark_min_time=0.01)
+
+compile_benchmark_test_with_main(link_main_test)
+add_test(NAME link_main_test COMMAND link_main_test --benchmark_min_time=0.01)
+
+compile_output_test(reporter_output_test)
+add_test(NAME reporter_output_test COMMAND reporter_output_test --benchmark_min_time=0.01)
+
+compile_output_test(templated_fixture_test)
+add_test(NAME templated_fixture_test COMMAND templated_fixture_test --benchmark_min_time=0.01)
+
+compile_output_test(user_counters_test)
+add_test(NAME user_counters_test COMMAND user_counters_test --benchmark_min_time=0.01)
+
+compile_output_test(perf_counters_test)
+add_test(NAME perf_counters_test COMMAND perf_counters_test --benchmark_min_time=0.01 --benchmark_perf_counters=CYCLES,BRANCHES)
+
+compile_output_test(internal_threading_test)
+add_test(NAME internal_threading_test COMMAND internal_threading_test --benchmark_min_time=0.01)
+
+compile_output_test(report_aggregates_only_test)
+add_test(NAME report_aggregates_only_test COMMAND report_aggregates_only_test --benchmark_min_time=0.01)
+
+compile_output_test(display_aggregates_only_test)
+add_test(NAME display_aggregates_only_test COMMAND display_aggregates_only_test --benchmark_min_time=0.01)
+
+compile_output_test(user_counters_tabular_test)
+add_test(NAME user_counters_tabular_test COMMAND user_counters_tabular_test --benchmark_counters_tabular=true --benchmark_min_time=0.01)
+
+compile_output_test(user_counters_thousands_test)
+add_test(NAME user_counters_thousands_test COMMAND user_counters_thousands_test --benchmark_min_time=0.01)
+
+compile_output_test(memory_manager_test)
+add_test(NAME memory_manager_test COMMAND memory_manager_test --benchmark_min_time=0.01)
+
+check_cxx_compiler_flag(-std=c++03 BENCHMARK_HAS_CXX03_FLAG)
+if (BENCHMARK_HAS_CXX03_FLAG)
+  compile_benchmark_test(cxx03_test)
+  set_target_properties(cxx03_test
+      PROPERTIES
+      CXX_STANDARD 98
+      CXX_STANDARD_REQUIRED YES)
+  # libstdc++ provides different definitions within <map> between dialects. When
+  # LTO is enabled and -Werror is specified GCC diagnoses this ODR violation
+  # causing the test to fail to compile. To prevent this we explicitly disable
+  # the warning.
+  check_cxx_compiler_flag(-Wno-odr BENCHMARK_HAS_WNO_ODR)
+  if (BENCHMARK_ENABLE_LTO AND BENCHMARK_HAS_WNO_ODR)
+    set_target_properties(cxx03_test
+        PROPERTIES
+        LINK_FLAGS "-Wno-odr")
+  endif()
+  add_test(NAME cxx03 COMMAND cxx03_test --benchmark_min_time=0.01)
+endif()
+
+# Attempt to work around flaky test failures when running on Appveyor servers.
+if (DEFINED ENV{APPVEYOR})
+  set(COMPLEXITY_MIN_TIME "0.5")
+else()
+  set(COMPLEXITY_MIN_TIME "0.01")
+endif()
+compile_output_test(complexity_test)
+add_test(NAME complexity_benchmark COMMAND complexity_test --benchmark_min_time=${COMPLEXITY_MIN_TIME})
+
+###############################################################################
+# GoogleTest Unit Tests
+###############################################################################
+
+if (BENCHMARK_ENABLE_GTEST_TESTS)
+  macro(compile_gtest name)
+    add_executable(${name} "${name}.cc")
+    target_link_libraries(${name} benchmark::benchmark
+        gmock_main ${CMAKE_THREAD_LIBS_INIT})
+  endmacro(compile_gtest)
+
+  macro(add_gtest name)
+    compile_gtest(${name})
+    add_test(NAME ${name} COMMAND ${name})
+  endmacro()
+
+  add_gtest(benchmark_gtest)
+  add_gtest(benchmark_name_gtest)
+  add_gtest(benchmark_random_interleaving_gtest)
+  add_gtest(commandlineflags_gtest)
+  add_gtest(statistics_gtest)
+  add_gtest(string_util_gtest)
+  add_gtest(perf_counters_gtest)
+endif(BENCHMARK_ENABLE_GTEST_TESTS)
+
+###############################################################################
+# Assembly Unit Tests
+###############################################################################
+
+if (BENCHMARK_ENABLE_ASSEMBLY_TESTS)
+  if (NOT LLVM_FILECHECK_EXE)
+    message(FATAL_ERROR "LLVM FileCheck is required when including this file")
+  endif()
+  include(AssemblyTests.cmake)
+  add_filecheck_test(donotoptimize_assembly_test)
+  add_filecheck_test(state_assembly_test)
+  add_filecheck_test(clobber_memory_assembly_test)
+endif()
+
+
+
+###############################################################################
+# Code Coverage Configuration
+###############################################################################
+
+# Add the coverage command(s)
+if(CMAKE_BUILD_TYPE)
+  string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
+endif()
+if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage")
+  find_program(GCOV gcov)
+  find_program(LCOV lcov)
+  find_program(GENHTML genhtml)
+  find_program(CTEST ctest)
+  if (GCOV AND LCOV AND GENHTML AND CTEST AND HAVE_CXX_FLAG_COVERAGE)
+    add_custom_command(
+      OUTPUT ${CMAKE_BINARY_DIR}/lcov/index.html
+      COMMAND ${LCOV} -q -z -d .
+      COMMAND ${LCOV} -q --no-external -c -b "${CMAKE_SOURCE_DIR}" -d . -o before.lcov -i
+      COMMAND ${CTEST} --force-new-ctest-process
+      COMMAND ${LCOV} -q --no-external -c -b "${CMAKE_SOURCE_DIR}" -d . -o after.lcov
+      COMMAND ${LCOV} -q -a before.lcov -a after.lcov --output-file final.lcov
+      COMMAND ${LCOV} -q -r final.lcov "'${CMAKE_SOURCE_DIR}/test/*'" -o final.lcov
+      COMMAND ${GENHTML} final.lcov -o lcov --demangle-cpp --sort -p "${CMAKE_BINARY_DIR}" -t benchmark
+      DEPENDS filter_test benchmark_test options_test basic_test fixture_test cxx03_test complexity_test
+      WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+      COMMENT "Running LCOV"
+    )
+    add_custom_target(coverage
+      DEPENDS ${CMAKE_BINARY_DIR}/lcov/index.html
+      COMMENT "LCOV report at lcov/index.html"
+    )
+    message(STATUS "Coverage command added")
+  else()
+    if (HAVE_CXX_FLAG_COVERAGE)
+      set(CXX_FLAG_COVERAGE_MESSAGE supported)
+    else()
+      set(CXX_FLAG_COVERAGE_MESSAGE unavailable)
+    endif()
+    message(WARNING
+      "Coverage not available:\n"
+      "  gcov: ${GCOV}\n"
+      "  lcov: ${LCOV}\n"
+      "  genhtml: ${GENHTML}\n"
+      "  ctest: ${CTEST}\n"
+      "  --coverage flag: ${CXX_FLAG_COVERAGE_MESSAGE}")
+  endif()
+endif()
diff --git a/3rdparty/benchmark/test/args_product_test.cc b/3rdparty/benchmark/test/args_product_test.cc
new file mode 100644
index 00000000..d44f391f
--- /dev/null
+++ b/3rdparty/benchmark/test/args_product_test.cc
@@ -0,0 +1,77 @@
+#include <cassert>
+#include <iostream>
+#include <set>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+
+class ArgsProductFixture : public ::benchmark::Fixture {
+ public:
+  ArgsProductFixture()
+      : expectedValues({{0, 100, 2000, 30000},
+                        {1, 15, 3, 8},
+                        {1, 15, 3, 9},
+                        {1, 15, 7, 8},
+                        {1, 15, 7, 9},
+                        {1, 15, 10, 8},
+                        {1, 15, 10, 9},
+                        {2, 15, 3, 8},
+                        {2, 15, 3, 9},
+                        {2, 15, 7, 8},
+                        {2, 15, 7, 9},
+                        {2, 15, 10, 8},
+                        {2, 15, 10, 9},
+                        {4, 5, 6, 11}}) {}
+
+  void SetUp(const ::benchmark::State& state) BENCHMARK_OVERRIDE {
+    std::vector<int64_t> ranges = {state.range(0), state.range(1),
+                                   state.range(2), state.range(3)};
+
+    assert(expectedValues.find(ranges) != expectedValues.end());
+
+    actualValues.insert(ranges);
+  }
+
+  // NOTE: This is not TearDown as we want to check after _all_ runs are
+  // complete.
+  virtual ~ArgsProductFixture() {
+    if (actualValues != expectedValues) {
+      std::cout << "EXPECTED\n";
+      for (const auto& v : expectedValues) {
+        std::cout << "{";
+        for (int64_t iv : v) {
+          std::cout << iv << ", ";
+        }
+        std::cout << "}\n";
+      }
+      std::cout << "ACTUAL\n";
+      for (const auto& v : actualValues) {
+        std::cout << "{";
+        for (int64_t iv : v) {
+          std::cout << iv << ", ";
+        }
+        std::cout << "}\n";
+      }
+    }
+  }
+
+  std::set<std::vector<int64_t>> expectedValues;
+  std::set<std::vector<int64_t>> actualValues;
+};
+
+BENCHMARK_DEFINE_F(ArgsProductFixture, Empty)(benchmark::State& state) {
+  for (auto _ : state) {
+    int64_t product =
+        state.range(0) * state.range(1) * state.range(2) * state.range(3);
+    for (int64_t x = 0; x < product; x++) {
+      benchmark::DoNotOptimize(x);
+    }
+  }
+}
+
+BENCHMARK_REGISTER_F(ArgsProductFixture, Empty)
+    ->Args({0, 100, 2000, 30000})
+    ->ArgsProduct({{1, 2}, {15}, {3, 7, 10}, {8, 9}})
+    ->Args({4, 5, 6, 11});
+
+BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/basic_test.cc b/3rdparty/benchmark/test/basic_test.cc
new file mode 100644
index 00000000..3a8fd42a
--- /dev/null
+++ b/3rdparty/benchmark/test/basic_test.cc
@@ -0,0 +1,179 @@
+
+#include "benchmark/benchmark.h"
+
+#define BASIC_BENCHMARK_TEST(x) BENCHMARK(x)->Arg(8)->Arg(512)->Arg(8192)
+
+void BM_empty(benchmark::State& state) {
+  for (auto _ : state) {
+    benchmark::DoNotOptimize(state.iterations());
+  }
+}
+BENCHMARK(BM_empty);
+BENCHMARK(BM_empty)->ThreadPerCpu();
+
+void BM_spin_empty(benchmark::State& state) {
+  for (auto _ : state) {
+    for (auto x = 0; x < state.range(0); ++x) {
+      benchmark::DoNotOptimize(x);
+    }
+  }
+}
+BASIC_BENCHMARK_TEST(BM_spin_empty);
+BASIC_BENCHMARK_TEST(BM_spin_empty)->ThreadPerCpu();
+
+void BM_spin_pause_before(benchmark::State& state) {
+  for (auto i = 0; i < state.range(0); ++i) {
+    benchmark::DoNotOptimize(i);
+  }
+  for (auto _ : state) {
+    for (auto i = 0; i < state.range(0); ++i) {
+      benchmark::DoNotOptimize(i);
+    }
+  }
+}
+BASIC_BENCHMARK_TEST(BM_spin_pause_before);
+BASIC_BENCHMARK_TEST(BM_spin_pause_before)->ThreadPerCpu();
+
+void BM_spin_pause_during(benchmark::State& state) {
+  for (auto _ : state) {
+    state.PauseTiming();
+    for (auto i = 0; i < state.range(0); ++i) {
+      benchmark::DoNotOptimize(i);
+    }
+    state.ResumeTiming();
+    for (auto i = 0; i < state.range(0); ++i) {
+      benchmark::DoNotOptimize(i);
+    }
+  }
+}
+BASIC_BENCHMARK_TEST(BM_spin_pause_during);
+BASIC_BENCHMARK_TEST(BM_spin_pause_during)->ThreadPerCpu();
+
+void BM_pause_during(benchmark::State& state) {
+  for (auto _ : state) {
+    state.PauseTiming();
+    state.ResumeTiming();
+  }
+}
+BENCHMARK(BM_pause_during);
+BENCHMARK(BM_pause_during)->ThreadPerCpu();
+BENCHMARK(BM_pause_during)->UseRealTime();
+BENCHMARK(BM_pause_during)->UseRealTime()->ThreadPerCpu();
+
+void BM_spin_pause_after(benchmark::State& state) {
+  for (auto _ : state) {
+    for (auto i = 0; i < state.range(0); ++i) {
+      benchmark::DoNotOptimize(i);
+    }
+  }
+  for (auto i = 0; i < state.range(0); ++i) {
+    benchmark::DoNotOptimize(i);
+  }
+}
+BASIC_BENCHMARK_TEST(BM_spin_pause_after);
+BASIC_BENCHMARK_TEST(BM_spin_pause_after)->ThreadPerCpu();
+
+void BM_spin_pause_before_and_after(benchmark::State& state) {
+  for (auto i = 0; i < state.range(0); ++i) {
+    benchmark::DoNotOptimize(i);
+  }
+  for (auto _ : state) {
+    for (auto i = 0; i < state.range(0); ++i) {
+      benchmark::DoNotOptimize(i);
+    }
+  }
+  for (auto i = 0; i < state.range(0); ++i) {
+    benchmark::DoNotOptimize(i);
+  }
+}
+BASIC_BENCHMARK_TEST(BM_spin_pause_before_and_after);
+BASIC_BENCHMARK_TEST(BM_spin_pause_before_and_after)->ThreadPerCpu();
+
+void BM_empty_stop_start(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_empty_stop_start);
+BENCHMARK(BM_empty_stop_start)->ThreadPerCpu();
+
+void BM_KeepRunning(benchmark::State& state) {
+  benchmark::IterationCount iter_count = 0;
+  assert(iter_count == state.iterations());
+  while (state.KeepRunning()) {
+    ++iter_count;
+  }
+  assert(iter_count == state.iterations());
+}
+BENCHMARK(BM_KeepRunning);
+
+void BM_KeepRunningBatch(benchmark::State& state) {
+  // Choose a batch size >1000 to skip the typical runs with iteration
+  // targets of 10, 100 and 1000.  If these are not actually skipped the
+  // bug would be detectable as consecutive runs with the same iteration
+  // count.  Below we assert that this does not happen.
+  const benchmark::IterationCount batch_size = 1009;
+
+  static benchmark::IterationCount prior_iter_count = 0;
+  benchmark::IterationCount iter_count = 0;
+  while (state.KeepRunningBatch(batch_size)) {
+    iter_count += batch_size;
+  }
+  assert(state.iterations() == iter_count);
+
+  // Verify that the iteration count always increases across runs (see
+  // comment above).
+  assert(iter_count == batch_size            // max_iterations == 1
+         || iter_count > prior_iter_count);  // max_iterations > batch_size
+  prior_iter_count = iter_count;
+}
+// Register with a fixed repetition count to establish the invariant that
+// the iteration count should always change across runs.  This overrides
+// the --benchmark_repetitions command line flag, which would otherwise
+// cause this test to fail if set > 1.
+BENCHMARK(BM_KeepRunningBatch)->Repetitions(1);
+
+void BM_RangedFor(benchmark::State& state) {
+  benchmark::IterationCount iter_count = 0;
+  for (auto _ : state) {
+    ++iter_count;
+  }
+  assert(iter_count == state.max_iterations);
+}
+BENCHMARK(BM_RangedFor);
+
+#ifdef BENCHMARK_HAS_CXX11
+template <typename T>
+void BM_OneTemplateFunc(benchmark::State& state) {
+  auto arg = state.range(0);
+  T sum = 0;
+  for (auto _ : state) {
+    sum += arg;
+  }
+}
+BENCHMARK(BM_OneTemplateFunc<int>)->Arg(1);
+BENCHMARK(BM_OneTemplateFunc<double>)->Arg(1);
+
+template <typename A, typename B>
+void BM_TwoTemplateFunc(benchmark::State& state) {
+  auto arg = state.range(0);
+  A sum = 0;
+  B prod = 1;
+  for (auto _ : state) {
+    sum += arg;
+    prod *= arg;
+  }
+}
+BENCHMARK(BM_TwoTemplateFunc<int, double>)->Arg(1);
+BENCHMARK(BM_TwoTemplateFunc<double, int>)->Arg(1);
+
+#endif  // BENCHMARK_HAS_CXX11
+
+// Ensure that StateIterator provides all the necessary typedefs required to
+// instantiate std::iterator_traits.
+static_assert(
+    std::is_same<typename std::iterator_traits<
+                     benchmark::State::StateIterator>::value_type,
+                 typename benchmark::State::StateIterator::value_type>::value,
+    "");
+
+BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/benchmark_gtest.cc b/3rdparty/benchmark/test/benchmark_gtest.cc
new file mode 100644
index 00000000..14a885ba
--- /dev/null
+++ b/3rdparty/benchmark/test/benchmark_gtest.cc
@@ -0,0 +1,165 @@
+#include <map>
+#include <string>
+#include <vector>
+
+#include "../src/benchmark_register.h"
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+
+namespace benchmark {
+namespace internal {
+extern std::map<std::string, std::string>* global_context;
+
+namespace {
+
+TEST(AddRangeTest, Simple) {
+  std::vector<int> dst;
+  AddRange(&dst, 1, 2, 2);
+  EXPECT_THAT(dst, testing::ElementsAre(1, 2));
+}
+
+TEST(AddRangeTest, Simple64) {
+  std::vector<int64_t> dst;
+  AddRange(&dst, static_cast<int64_t>(1), static_cast<int64_t>(2), 2);
+  EXPECT_THAT(dst, testing::ElementsAre(1, 2));
+}
+
+TEST(AddRangeTest, Advanced) {
+  std::vector<int> dst;
+  AddRange(&dst, 5, 15, 2);
+  EXPECT_THAT(dst, testing::ElementsAre(5, 8, 15));
+}
+
+TEST(AddRangeTest, Advanced64) {
+  std::vector<int64_t> dst;
+  AddRange(&dst, static_cast<int64_t>(5), static_cast<int64_t>(15), 2);
+  EXPECT_THAT(dst, testing::ElementsAre(5, 8, 15));
+}
+
+TEST(AddRangeTest, FullRange8) {
+  std::vector<int8_t> dst;
+  AddRange(&dst, int8_t{1}, std::numeric_limits<int8_t>::max(), 8);
+  EXPECT_THAT(dst, testing::ElementsAre(1, 8, 64, 127));
+}
+
+TEST(AddRangeTest, FullRange64) {
+  std::vector<int64_t> dst;
+  AddRange(&dst, int64_t{1}, std::numeric_limits<int64_t>::max(), 1024);
+  EXPECT_THAT(
+      dst, testing::ElementsAre(1LL, 1024LL, 1048576LL, 1073741824LL,
+                                1099511627776LL, 1125899906842624LL,
+                                1152921504606846976LL, 9223372036854775807LL));
+}
+
+TEST(AddRangeTest, NegativeRanges) {
+  std::vector<int> dst;
+  AddRange(&dst, -8, 0, 2);
+  EXPECT_THAT(dst, testing::ElementsAre(-8, -4, -2, -1, 0));
+}
+
+TEST(AddRangeTest, StrictlyNegative) {
+  std::vector<int> dst;
+  AddRange(&dst, -8, -1, 2);
+  EXPECT_THAT(dst, testing::ElementsAre(-8, -4, -2, -1));
+}
+
+TEST(AddRangeTest, SymmetricNegativeRanges) {
+  std::vector<int> dst;
+  AddRange(&dst, -8, 8, 2);
+  EXPECT_THAT(dst, testing::ElementsAre(-8, -4, -2, -1, 0, 1, 2, 4, 8));
+}
+
+TEST(AddRangeTest, SymmetricNegativeRangesOddMult) {
+  std::vector<int> dst;
+  AddRange(&dst, -30, 32, 5);
+  EXPECT_THAT(dst, testing::ElementsAre(-30, -25, -5, -1, 0, 1, 5, 25, 32));
+}
+
+TEST(AddRangeTest, NegativeRangesAsymmetric) {
+  std::vector<int> dst;
+  AddRange(&dst, -3, 5, 2);
+  EXPECT_THAT(dst, testing::ElementsAre(-3, -2, -1, 0, 1, 2, 4, 5));
+}
+
+TEST(AddRangeTest, NegativeRangesLargeStep) {
+  // Always include -1, 0, 1 when crossing zero.
+  std::vector<int> dst;
+  AddRange(&dst, -8, 8, 10);
+  EXPECT_THAT(dst, testing::ElementsAre(-8, -1, 0, 1, 8));
+}
+
+TEST(AddRangeTest, ZeroOnlyRange) {
+  std::vector<int> dst;
+  AddRange(&dst, 0, 0, 2);
+  EXPECT_THAT(dst, testing::ElementsAre(0));
+}
+
+TEST(AddRangeTest, ZeroStartingRange) {
+  std::vector<int> dst;
+  AddRange(&dst, 0, 2, 2);
+  EXPECT_THAT(dst, testing::ElementsAre(0, 1, 2));
+}
+
+TEST(AddRangeTest, NegativeRange64) {
+  std::vector<int64_t> dst;
+  AddRange<int64_t>(&dst, -4, 4, 2);
+  EXPECT_THAT(dst, testing::ElementsAre(-4, -2, -1, 0, 1, 2, 4));
+}
+
+TEST(AddRangeTest, NegativeRangePreservesExistingOrder) {
+  // If elements already exist in the range, ensure we don't change
+  // their ordering by adding negative values.
+  std::vector<int64_t> dst = {1, 2, 3};
+  AddRange<int64_t>(&dst, -2, 2, 2);
+  EXPECT_THAT(dst, testing::ElementsAre(1, 2, 3, -2, -1, 0, 1, 2));
+}
+
+TEST(AddRangeTest, FullNegativeRange64) {
+  std::vector<int64_t> dst;
+  const auto min = std::numeric_limits<int64_t>::min();
+  const auto max = std::numeric_limits<int64_t>::max();
+  AddRange(&dst, min, max, 1024);
+  EXPECT_THAT(
+      dst, testing::ElementsAreArray(std::vector<int64_t>{
+               min, -1152921504606846976LL, -1125899906842624LL,
+               -1099511627776LL, -1073741824LL, -1048576LL, -1024LL, -1LL, 0LL,
+               1LL, 1024LL, 1048576LL, 1073741824LL, 1099511627776LL,
+               1125899906842624LL, 1152921504606846976LL, max}));
+}
+
+TEST(AddRangeTest, Simple8) {
+  std::vector<int8_t> dst;
+  AddRange<int8_t>(&dst, 1, 8, 2);
+  EXPECT_THAT(dst, testing::ElementsAre(1, 2, 4, 8));
+}
+
+TEST(AddCustomContext, Simple) {
+  EXPECT_THAT(global_context, nullptr);
+
+  AddCustomContext("foo", "bar");
+  AddCustomContext("baz", "qux");
+
+  EXPECT_THAT(*global_context,
+              testing::UnorderedElementsAre(testing::Pair("foo", "bar"),
+                                            testing::Pair("baz", "qux")));
+
+  delete global_context;
+  global_context = nullptr;
+}
+
+TEST(AddCustomContext, DuplicateKey) {
+  EXPECT_THAT(global_context, nullptr);
+
+  AddCustomContext("foo", "bar");
+  AddCustomContext("foo", "qux");
+
+  EXPECT_THAT(*global_context,
+              testing::UnorderedElementsAre(testing::Pair("foo", "bar")));
+
+  delete global_context;
+  global_context = nullptr;
+}
+
+}  // namespace
+}  // namespace internal
+}  // namespace benchmark
diff --git a/3rdparty/benchmark/test/benchmark_name_gtest.cc b/3rdparty/benchmark/test/benchmark_name_gtest.cc
new file mode 100644
index 00000000..afb401c1
--- /dev/null
+++ b/3rdparty/benchmark/test/benchmark_name_gtest.cc
@@ -0,0 +1,74 @@
+#include "benchmark/benchmark.h"
+#include "gtest/gtest.h"
+
+namespace {
+
+using namespace benchmark;
+using namespace benchmark::internal;
+
+TEST(BenchmarkNameTest, Empty) {
+  const auto name = BenchmarkName();
+  EXPECT_EQ(name.str(), std::string());
+}
+
+TEST(BenchmarkNameTest, FunctionName) {
+  auto name = BenchmarkName();
+  name.function_name = "function_name";
+  EXPECT_EQ(name.str(), "function_name");
+}
+
+TEST(BenchmarkNameTest, FunctionNameAndArgs) {
+  auto name = BenchmarkName();
+  name.function_name = "function_name";
+  name.args = "some_args:3/4/5";
+  EXPECT_EQ(name.str(), "function_name/some_args:3/4/5");
+}
+
+TEST(BenchmarkNameTest, MinTime) {
+  auto name = BenchmarkName();
+  name.function_name = "function_name";
+  name.args = "some_args:3/4";
+  name.min_time = "min_time:3.4s";
+  EXPECT_EQ(name.str(), "function_name/some_args:3/4/min_time:3.4s");
+}
+
+TEST(BenchmarkNameTest, Iterations) {
+  auto name = BenchmarkName();
+  name.function_name = "function_name";
+  name.min_time = "min_time:3.4s";
+  name.iterations = "iterations:42";
+  EXPECT_EQ(name.str(), "function_name/min_time:3.4s/iterations:42");
+}
+
+TEST(BenchmarkNameTest, Repetitions) {
+  auto name = BenchmarkName();
+  name.function_name = "function_name";
+  name.min_time = "min_time:3.4s";
+  name.repetitions = "repetitions:24";
+  EXPECT_EQ(name.str(), "function_name/min_time:3.4s/repetitions:24");
+}
+
+TEST(BenchmarkNameTest, TimeType) {
+  auto name = BenchmarkName();
+  name.function_name = "function_name";
+  name.min_time = "min_time:3.4s";
+  name.time_type = "hammer_time";
+  EXPECT_EQ(name.str(), "function_name/min_time:3.4s/hammer_time");
+}
+
+TEST(BenchmarkNameTest, Threads) {
+  auto name = BenchmarkName();
+  name.function_name = "function_name";
+  name.min_time = "min_time:3.4s";
+  name.threads = "threads:256";
+  EXPECT_EQ(name.str(), "function_name/min_time:3.4s/threads:256");
+}
+
+TEST(BenchmarkNameTest, TestEmptyFunctionName) {
+  auto name = BenchmarkName();
+  name.args = "first:3/second:4";
+  name.threads = "threads:22";
+  EXPECT_EQ(name.str(), "first:3/second:4/threads:22");
+}
+
+}  // end namespace
diff --git a/3rdparty/benchmark/test/benchmark_random_interleaving_gtest.cc b/3rdparty/benchmark/test/benchmark_random_interleaving_gtest.cc
new file mode 100644
index 00000000..d04befa8
--- /dev/null
+++ b/3rdparty/benchmark/test/benchmark_random_interleaving_gtest.cc
@@ -0,0 +1,127 @@
+#include <queue>
+#include <string>
+#include <vector>
+
+#include "../src/commandlineflags.h"
+#include "../src/string_util.h"
+#include "benchmark/benchmark.h"
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+
+namespace benchmark {
+
+BM_DECLARE_bool(benchmark_enable_random_interleaving);
+BM_DECLARE_string(benchmark_filter);
+BM_DECLARE_int32(benchmark_repetitions);
+
+namespace internal {
+namespace {
+
+class EventQueue : public std::queue<std::string> {
+ public:
+  void Put(const std::string& event) { push(event); }
+
+  void Clear() {
+    while (!empty()) {
+      pop();
+    }
+  }
+
+  std::string Get() {
+    std::string event = front();
+    pop();
+    return event;
+  }
+};
+
+EventQueue* queue = new EventQueue();
+
+class NullReporter : public BenchmarkReporter {
+ public:
+  bool ReportContext(const Context& /*context*/) override { return true; }
+  void ReportRuns(const std::vector<Run>& /* report */) override {}
+};
+
+class BenchmarkTest : public testing::Test {
+ public:
+  static void SetupHook(int /* num_threads */) { queue->push("Setup"); }
+
+  static void TeardownHook(int /* num_threads */) { queue->push("Teardown"); }
+
+  void Execute(const std::string& pattern) {
+    queue->Clear();
+
+    BenchmarkReporter* reporter = new NullReporter;
+    FLAGS_benchmark_filter = pattern;
+    RunSpecifiedBenchmarks(reporter);
+    delete reporter;
+
+    queue->Put("DONE");  // End marker
+  }
+};
+
+void BM_Match1(benchmark::State& state) {
+  const int64_t arg = state.range(0);
+
+  for (auto _ : state) {
+  }
+  queue->Put(StrFormat("BM_Match1/%d", static_cast<int>(arg)));
+}
+BENCHMARK(BM_Match1)
+    ->Iterations(100)
+    ->Arg(1)
+    ->Arg(2)
+    ->Arg(3)
+    ->Range(10, 80)
+    ->Args({90})
+    ->Args({100});
+
+TEST_F(BenchmarkTest, Match1) {
+  Execute("BM_Match1");
+  ASSERT_EQ("BM_Match1/1", queue->Get());
+  ASSERT_EQ("BM_Match1/2", queue->Get());
+  ASSERT_EQ("BM_Match1/3", queue->Get());
+  ASSERT_EQ("BM_Match1/10", queue->Get());
+  ASSERT_EQ("BM_Match1/64", queue->Get());
+  ASSERT_EQ("BM_Match1/80", queue->Get());
+  ASSERT_EQ("BM_Match1/90", queue->Get());
+  ASSERT_EQ("BM_Match1/100", queue->Get());
+  ASSERT_EQ("DONE", queue->Get());
+}
+
+TEST_F(BenchmarkTest, Match1WithRepetition) {
+  FLAGS_benchmark_repetitions = 2;
+
+  Execute("BM_Match1/(64|80)");
+  ASSERT_EQ("BM_Match1/64", queue->Get());
+  ASSERT_EQ("BM_Match1/64", queue->Get());
+  ASSERT_EQ("BM_Match1/80", queue->Get());
+  ASSERT_EQ("BM_Match1/80", queue->Get());
+  ASSERT_EQ("DONE", queue->Get());
+}
+
+TEST_F(BenchmarkTest, Match1WithRandomInterleaving) {
+  FLAGS_benchmark_enable_random_interleaving = true;
+  FLAGS_benchmark_repetitions = 100;
+
+  std::map<std::string, int> element_count;
+  std::map<std::string, int> interleaving_count;
+  Execute("BM_Match1/(64|80)");
+  for (int i = 0; i < 100; ++i) {
+    std::vector<std::string> interleaving;
+    interleaving.push_back(queue->Get());
+    interleaving.push_back(queue->Get());
+    element_count[interleaving[0]]++;
+    element_count[interleaving[1]]++;
+    interleaving_count[StrFormat("%s,%s", interleaving[0].c_str(),
+                                 interleaving[1].c_str())]++;
+  }
+  EXPECT_EQ(element_count["BM_Match1/64"], 100) << "Unexpected repetitions.";
+  EXPECT_EQ(element_count["BM_Match1/80"], 100) << "Unexpected repetitions.";
+  EXPECT_GE(interleaving_count.size(), 2) << "Interleaving was not randomized.";
+  ASSERT_EQ("DONE", queue->Get());
+}
+
+}  // namespace
+}  // namespace internal
+}  // namespace benchmark
diff --git a/3rdparty/benchmark/test/benchmark_setup_teardown_test.cc b/3rdparty/benchmark/test/benchmark_setup_teardown_test.cc
new file mode 100644
index 00000000..efa34e15
--- /dev/null
+++ b/3rdparty/benchmark/test/benchmark_setup_teardown_test.cc
@@ -0,0 +1,157 @@
+#include <atomic>
+#include <cassert>
+#include <cstdlib>
+#include <cstring>
+#include <iostream>
+#include <limits>
+#include <string>
+
+#include "benchmark/benchmark.h"
+
+// Test that Setup() and Teardown() are called exactly once
+// for each benchmark run (single-threaded).
+namespace single {
+static int setup_call = 0;
+static int teardown_call = 0;
+}  // namespace single
+static void DoSetup1(const benchmark::State& state) {
+  ++single::setup_call;
+
+  // Setup/Teardown should never be called with any thread_idx != 0.
+  assert(state.thread_index() == 0);
+}
+
+static void DoTeardown1(const benchmark::State& state) {
+  ++single::teardown_call;
+  assert(state.thread_index() == 0);
+}
+
+static void BM_with_setup(benchmark::State& state) {
+  for (auto s : state) {
+  }
+}
+BENCHMARK(BM_with_setup)
+    ->Arg(1)
+    ->Arg(3)
+    ->Arg(5)
+    ->Arg(7)
+    ->Iterations(100)
+    ->Setup(DoSetup1)
+    ->Teardown(DoTeardown1);
+
+// Test that Setup() and Teardown() are called once for each group of threads.
+namespace concurrent {
+static std::atomic<int> setup_call(0);
+static std::atomic<int> teardown_call(0);
+static std::atomic<int> func_call(0);
+}  // namespace concurrent
+
+static void DoSetup2(const benchmark::State& state) {
+  concurrent::setup_call.fetch_add(1, std::memory_order_acquire);
+  assert(state.thread_index() == 0);
+}
+
+static void DoTeardown2(const benchmark::State& state) {
+  concurrent::teardown_call.fetch_add(1, std::memory_order_acquire);
+  assert(state.thread_index() == 0);
+}
+
+static void BM_concurrent(benchmark::State& state) {
+  for (auto s : state) {
+  }
+  concurrent::func_call.fetch_add(1, std::memory_order_acquire);
+}
+
+BENCHMARK(BM_concurrent)
+    ->Setup(DoSetup2)
+    ->Teardown(DoTeardown2)
+    ->Iterations(100)
+    ->Threads(5)
+    ->Threads(10)
+    ->Threads(15);
+
+// Testing interaction with Fixture::Setup/Teardown
+namespace fixture_interaction {
+int setup = 0;
+int fixture_setup = 0;
+}  // namespace fixture_interaction
+
+#define FIXTURE_BECHMARK_NAME MyFixture
+
+class FIXTURE_BECHMARK_NAME : public ::benchmark::Fixture {
+ public:
+  void SetUp(const ::benchmark::State&) BENCHMARK_OVERRIDE {
+    fixture_interaction::fixture_setup++;
+  }
+
+  ~FIXTURE_BECHMARK_NAME() {}
+};
+
+BENCHMARK_F(FIXTURE_BECHMARK_NAME, BM_WithFixture)(benchmark::State& st) {
+  for (auto _ : st) {
+  }
+}
+
+static void DoSetupWithFixture(const benchmark::State&) {
+  fixture_interaction::setup++;
+}
+
+BENCHMARK_REGISTER_F(FIXTURE_BECHMARK_NAME, BM_WithFixture)
+    ->Arg(1)
+    ->Arg(3)
+    ->Arg(5)
+    ->Arg(7)
+    ->Setup(DoSetupWithFixture)
+    ->Repetitions(1)
+    ->Iterations(100);
+
+// Testing repetitions.
+namespace repetitions {
+int setup = 0;
+}
+
+static void DoSetupWithRepetitions(const benchmark::State&) {
+  repetitions::setup++;
+}
+static void BM_WithRep(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+
+BENCHMARK(BM_WithRep)
+    ->Arg(1)
+    ->Arg(3)
+    ->Arg(5)
+    ->Arg(7)
+    ->Setup(DoSetupWithRepetitions)
+    ->Iterations(100)
+    ->Repetitions(4);
+
+int main(int argc, char** argv) {
+  benchmark::Initialize(&argc, argv);
+
+  size_t ret = benchmark::RunSpecifiedBenchmarks(".");
+  assert(ret > 0);
+
+  // Setup/Teardown is called once for each arg group (1,3,5,7).
+  assert(single::setup_call == 4);
+  assert(single::teardown_call == 4);
+
+  // 3 group of threads calling this function (3,5,10).
+  assert(concurrent::setup_call.load(std::memory_order_relaxed) == 3);
+  assert(concurrent::teardown_call.load(std::memory_order_relaxed) == 3);
+  assert((5 + 10 + 15) ==
+         concurrent::func_call.load(std::memory_order_relaxed));
+
+  // Setup is called 4 times, once for each arg group (1,3,5,7)
+  assert(fixture_interaction::setup == 4);
+  // Fixture::Setup is called everytime the bm routine is run.
+  // The exact number is indeterministic, so we just assert that
+  // it's more than setup.
+  assert(fixture_interaction::fixture_setup > fixture_interaction::setup);
+
+  // Setup is call once for each repetition * num_arg =  4 * 4 = 16.
+  assert(repetitions::setup == 16);
+
+  return 0;
+}
diff --git a/3rdparty/benchmark/test/benchmark_test.cc b/3rdparty/benchmark/test/benchmark_test.cc
new file mode 100644
index 00000000..2906cdcd
--- /dev/null
+++ b/3rdparty/benchmark/test/benchmark_test.cc
@@ -0,0 +1,247 @@
+#include "benchmark/benchmark.h"
+
+#include <assert.h>
+#include <math.h>
+#include <stdint.h>
+
+#include <chrono>
+#include <cstdlib>
+#include <iostream>
+#include <limits>
+#include <list>
+#include <map>
+#include <mutex>
+#include <set>
+#include <sstream>
+#include <string>
+#include <thread>
+#include <utility>
+#include <vector>
+
+#if defined(__GNUC__)
+#define BENCHMARK_NOINLINE __attribute__((noinline))
+#else
+#define BENCHMARK_NOINLINE
+#endif
+
+namespace {
+
+int BENCHMARK_NOINLINE Factorial(uint32_t n) {
+  return (n == 1) ? 1 : n * Factorial(n - 1);
+}
+
+double CalculatePi(int depth) {
+  double pi = 0.0;
+  for (int i = 0; i < depth; ++i) {
+    double numerator = static_cast<double>(((i % 2) * 2) - 1);
+    double denominator = static_cast<double>((2 * i) - 1);
+    pi += numerator / denominator;
+  }
+  return (pi - 1.0) * 4;
+}
+
+std::set<int64_t> ConstructRandomSet(int64_t size) {
+  std::set<int64_t> s;
+  for (int i = 0; i < size; ++i) s.insert(s.end(), i);
+  return s;
+}
+
+std::mutex test_vector_mu;
+std::vector<int>* test_vector = nullptr;
+
+}  // end namespace
+
+static void BM_Factorial(benchmark::State& state) {
+  int fac_42 = 0;
+  for (auto _ : state) fac_42 = Factorial(8);
+  // Prevent compiler optimizations
+  std::stringstream ss;
+  ss << fac_42;
+  state.SetLabel(ss.str());
+}
+BENCHMARK(BM_Factorial);
+BENCHMARK(BM_Factorial)->UseRealTime();
+
+static void BM_CalculatePiRange(benchmark::State& state) {
+  double pi = 0.0;
+  for (auto _ : state) pi = CalculatePi(static_cast<int>(state.range(0)));
+  std::stringstream ss;
+  ss << pi;
+  state.SetLabel(ss.str());
+}
+BENCHMARK_RANGE(BM_CalculatePiRange, 1, 1024 * 1024);
+
+static void BM_CalculatePi(benchmark::State& state) {
+  static const int depth = 1024;
+  for (auto _ : state) {
+    benchmark::DoNotOptimize(CalculatePi(static_cast<int>(depth)));
+  }
+}
+BENCHMARK(BM_CalculatePi)->Threads(8);
+BENCHMARK(BM_CalculatePi)->ThreadRange(1, 32);
+BENCHMARK(BM_CalculatePi)->ThreadPerCpu();
+
+static void BM_SetInsert(benchmark::State& state) {
+  std::set<int64_t> data;
+  for (auto _ : state) {
+    state.PauseTiming();
+    data = ConstructRandomSet(state.range(0));
+    state.ResumeTiming();
+    for (int j = 0; j < state.range(1); ++j) data.insert(rand());
+  }
+  state.SetItemsProcessed(state.iterations() * state.range(1));
+  state.SetBytesProcessed(state.iterations() * state.range(1) * sizeof(int));
+}
+
+// Test many inserts at once to reduce the total iterations needed. Otherwise,
+// the slower, non-timed part of each iteration will make the benchmark take
+// forever.
+BENCHMARK(BM_SetInsert)->Ranges({{1 << 10, 8 << 10}, {128, 512}});
+
+template <typename Container,
+          typename ValueType = typename Container::value_type>
+static void BM_Sequential(benchmark::State& state) {
+  ValueType v = 42;
+  for (auto _ : state) {
+    Container c;
+    for (int64_t i = state.range(0); --i;) c.push_back(v);
+  }
+  const int64_t items_processed = state.iterations() * state.range(0);
+  state.SetItemsProcessed(items_processed);
+  state.SetBytesProcessed(items_processed * sizeof(v));
+}
+BENCHMARK_TEMPLATE2(BM_Sequential, std::vector<int>, int)
+    ->Range(1 << 0, 1 << 10);
+BENCHMARK_TEMPLATE(BM_Sequential, std::list<int>)->Range(1 << 0, 1 << 10);
+// Test the variadic version of BENCHMARK_TEMPLATE in C++11 and beyond.
+#ifdef BENCHMARK_HAS_CXX11
+BENCHMARK_TEMPLATE(BM_Sequential, std::vector<int>, int)->Arg(512);
+#endif
+
+static void BM_StringCompare(benchmark::State& state) {
+  size_t len = static_cast<size_t>(state.range(0));
+  std::string s1(len, '-');
+  std::string s2(len, '-');
+  for (auto _ : state) benchmark::DoNotOptimize(s1.compare(s2));
+}
+BENCHMARK(BM_StringCompare)->Range(1, 1 << 20);
+
+static void BM_SetupTeardown(benchmark::State& state) {
+  if (state.thread_index() == 0) {
+    // No need to lock test_vector_mu here as this is running single-threaded.
+    test_vector = new std::vector<int>();
+  }
+  int i = 0;
+  for (auto _ : state) {
+    std::lock_guard<std::mutex> l(test_vector_mu);
+    if (i % 2 == 0)
+      test_vector->push_back(i);
+    else
+      test_vector->pop_back();
+    ++i;
+  }
+  if (state.thread_index() == 0) {
+    delete test_vector;
+  }
+}
+BENCHMARK(BM_SetupTeardown)->ThreadPerCpu();
+
+static void BM_LongTest(benchmark::State& state) {
+  double tracker = 0.0;
+  for (auto _ : state) {
+    for (int i = 0; i < state.range(0); ++i)
+      benchmark::DoNotOptimize(tracker += i);
+  }
+}
+BENCHMARK(BM_LongTest)->Range(1 << 16, 1 << 28);
+
+static void BM_ParallelMemset(benchmark::State& state) {
+  int64_t size = state.range(0) / static_cast<int64_t>(sizeof(int));
+  int thread_size = static_cast<int>(size) / state.threads();
+  int from = thread_size * state.thread_index();
+  int to = from + thread_size;
+
+  if (state.thread_index() == 0) {
+    test_vector = new std::vector<int>(static_cast<size_t>(size));
+  }
+
+  for (auto _ : state) {
+    for (int i = from; i < to; i++) {
+      // No need to lock test_vector_mu as ranges
+      // do not overlap between threads.
+      benchmark::DoNotOptimize(test_vector->at(i) = 1);
+    }
+  }
+
+  if (state.thread_index() == 0) {
+    delete test_vector;
+  }
+}
+BENCHMARK(BM_ParallelMemset)->Arg(10 << 20)->ThreadRange(1, 4);
+
+static void BM_ManualTiming(benchmark::State& state) {
+  int64_t slept_for = 0;
+  int64_t microseconds = state.range(0);
+  std::chrono::duration<double, std::micro> sleep_duration{
+      static_cast<double>(microseconds)};
+
+  for (auto _ : state) {
+    auto start = std::chrono::high_resolution_clock::now();
+    // Simulate some useful workload with a sleep
+    std::this_thread::sleep_for(
+        std::chrono::duration_cast<std::chrono::nanoseconds>(sleep_duration));
+    auto end = std::chrono::high_resolution_clock::now();
+
+    auto elapsed =
+        std::chrono::duration_cast<std::chrono::duration<double>>(end - start);
+
+    state.SetIterationTime(elapsed.count());
+    slept_for += microseconds;
+  }
+  state.SetItemsProcessed(slept_for);
+}
+BENCHMARK(BM_ManualTiming)->Range(1, 1 << 14)->UseRealTime();
+BENCHMARK(BM_ManualTiming)->Range(1, 1 << 14)->UseManualTime();
+
+#ifdef BENCHMARK_HAS_CXX11
+
+template <class... Args>
+void BM_with_args(benchmark::State& state, Args&&...) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK_CAPTURE(BM_with_args, int_test, 42, 43, 44);
+BENCHMARK_CAPTURE(BM_with_args, string_and_pair_test, std::string("abc"),
+                  std::pair<int, double>(42, 3.8));
+
+void BM_non_template_args(benchmark::State& state, int, double) {
+  while (state.KeepRunning()) {
+  }
+}
+BENCHMARK_CAPTURE(BM_non_template_args, basic_test, 0, 0);
+
+#endif  // BENCHMARK_HAS_CXX11
+
+static void BM_DenseThreadRanges(benchmark::State& st) {
+  switch (st.range(0)) {
+    case 1:
+      assert(st.threads() == 1 || st.threads() == 2 || st.threads() == 3);
+      break;
+    case 2:
+      assert(st.threads() == 1 || st.threads() == 3 || st.threads() == 4);
+      break;
+    case 3:
+      assert(st.threads() == 5 || st.threads() == 8 || st.threads() == 11 ||
+             st.threads() == 14);
+      break;
+    default:
+      assert(false && "Invalid test case number");
+  }
+  while (st.KeepRunning()) {
+  }
+}
+BENCHMARK(BM_DenseThreadRanges)->Arg(1)->DenseThreadRange(1, 3);
+BENCHMARK(BM_DenseThreadRanges)->Arg(2)->DenseThreadRange(1, 4, 2);
+BENCHMARK(BM_DenseThreadRanges)->Arg(3)->DenseThreadRange(5, 14, 3);
+
+BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/clobber_memory_assembly_test.cc b/3rdparty/benchmark/test/clobber_memory_assembly_test.cc
new file mode 100644
index 00000000..ab269130
--- /dev/null
+++ b/3rdparty/benchmark/test/clobber_memory_assembly_test.cc
@@ -0,0 +1,63 @@
+#include <benchmark/benchmark.h>
+
+#ifdef __clang__
+#pragma clang diagnostic ignored "-Wreturn-type"
+#endif
+
+extern "C" {
+
+extern int ExternInt;
+extern int ExternInt2;
+extern int ExternInt3;
+}
+
+// CHECK-LABEL: test_basic:
+extern "C" void test_basic() {
+  int x;
+  benchmark::DoNotOptimize(&x);
+  x = 101;
+  benchmark::ClobberMemory();
+  // CHECK: leaq [[DEST:[^,]+]], %rax
+  // CHECK: movl $101, [[DEST]]
+  // CHECK: ret
+}
+
+// CHECK-LABEL: test_redundant_store:
+extern "C" void test_redundant_store() {
+  ExternInt = 3;
+  benchmark::ClobberMemory();
+  ExternInt = 51;
+  // CHECK-DAG: ExternInt
+  // CHECK-DAG: movl $3
+  // CHECK: movl $51
+}
+
+// CHECK-LABEL: test_redundant_read:
+extern "C" void test_redundant_read() {
+  int x;
+  benchmark::DoNotOptimize(&x);
+  x = ExternInt;
+  benchmark::ClobberMemory();
+  x = ExternInt2;
+  // CHECK: leaq [[DEST:[^,]+]], %rax
+  // CHECK: ExternInt(%rip)
+  // CHECK: movl %eax, [[DEST]]
+  // CHECK-NOT: ExternInt2
+  // CHECK: ret
+}
+
+// CHECK-LABEL: test_redundant_read2:
+extern "C" void test_redundant_read2() {
+  int x;
+  benchmark::DoNotOptimize(&x);
+  x = ExternInt;
+  benchmark::ClobberMemory();
+  x = ExternInt2;
+  benchmark::ClobberMemory();
+  // CHECK: leaq [[DEST:[^,]+]], %rax
+  // CHECK: ExternInt(%rip)
+  // CHECK: movl %eax, [[DEST]]
+  // CHECK: ExternInt2(%rip)
+  // CHECK: movl %eax, [[DEST]]
+  // CHECK: ret
+}
diff --git a/3rdparty/benchmark/test/commandlineflags_gtest.cc b/3rdparty/benchmark/test/commandlineflags_gtest.cc
new file mode 100644
index 00000000..8412008f
--- /dev/null
+++ b/3rdparty/benchmark/test/commandlineflags_gtest.cc
@@ -0,0 +1,228 @@
+#include <cstdlib>
+
+#include "../src/commandlineflags.h"
+#include "../src/internal_macros.h"
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+
+namespace benchmark {
+namespace {
+
+#if defined(BENCHMARK_OS_WINDOWS)
+int setenv(const char* name, const char* value, int overwrite) {
+  if (!overwrite) {
+    // NOTE: getenv_s is far superior but not available under mingw.
+    char* env_value = getenv(name);
+    if (env_value == nullptr) {
+      return -1;
+    }
+  }
+  return _putenv_s(name, value);
+}
+
+int unsetenv(const char* name) { return _putenv_s(name, ""); }
+
+#endif  // BENCHMARK_OS_WINDOWS
+
+TEST(BoolFromEnv, Default) {
+  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
+  EXPECT_EQ(BoolFromEnv("not_in_env", true), true);
+}
+
+TEST(BoolFromEnv, False) {
+  ASSERT_EQ(setenv("IN_ENV", "0", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "N", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "n", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "NO", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "No", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "no", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "F", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "f", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "FALSE", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "False", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "false", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "OFF", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "Off", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "off", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", true), false);
+  unsetenv("IN_ENV");
+}
+
+TEST(BoolFromEnv, True) {
+  ASSERT_EQ(setenv("IN_ENV", "1", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "Y", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "y", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "YES", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "Yes", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "yes", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "T", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "t", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "TRUE", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "True", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "true", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "ON", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "On", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+  ASSERT_EQ(setenv("IN_ENV", "on", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+
+#ifndef BENCHMARK_OS_WINDOWS
+  ASSERT_EQ(setenv("IN_ENV", "", 1), 0);
+  EXPECT_EQ(BoolFromEnv("in_env", false), true);
+  unsetenv("IN_ENV");
+#endif
+}
+
+TEST(Int32FromEnv, NotInEnv) {
+  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
+  EXPECT_EQ(Int32FromEnv("not_in_env", 42), 42);
+}
+
+TEST(Int32FromEnv, InvalidInteger) {
+  ASSERT_EQ(setenv("IN_ENV", "foo", 1), 0);
+  EXPECT_EQ(Int32FromEnv("in_env", 42), 42);
+  unsetenv("IN_ENV");
+}
+
+TEST(Int32FromEnv, ValidInteger) {
+  ASSERT_EQ(setenv("IN_ENV", "42", 1), 0);
+  EXPECT_EQ(Int32FromEnv("in_env", 64), 42);
+  unsetenv("IN_ENV");
+}
+
+TEST(DoubleFromEnv, NotInEnv) {
+  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
+  EXPECT_EQ(DoubleFromEnv("not_in_env", 0.51), 0.51);
+}
+
+TEST(DoubleFromEnv, InvalidReal) {
+  ASSERT_EQ(setenv("IN_ENV", "foo", 1), 0);
+  EXPECT_EQ(DoubleFromEnv("in_env", 0.51), 0.51);
+  unsetenv("IN_ENV");
+}
+
+TEST(DoubleFromEnv, ValidReal) {
+  ASSERT_EQ(setenv("IN_ENV", "0.51", 1), 0);
+  EXPECT_EQ(DoubleFromEnv("in_env", 0.71), 0.51);
+  unsetenv("IN_ENV");
+}
+
+TEST(StringFromEnv, Default) {
+  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
+  EXPECT_STREQ(StringFromEnv("not_in_env", "foo"), "foo");
+}
+
+TEST(StringFromEnv, Valid) {
+  ASSERT_EQ(setenv("IN_ENV", "foo", 1), 0);
+  EXPECT_STREQ(StringFromEnv("in_env", "bar"), "foo");
+  unsetenv("IN_ENV");
+}
+
+TEST(KvPairsFromEnv, Default) {
+  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
+  EXPECT_THAT(KvPairsFromEnv("not_in_env", {{"foo", "bar"}}),
+              testing::ElementsAre(testing::Pair("foo", "bar")));
+}
+
+TEST(KvPairsFromEnv, MalformedReturnsDefault) {
+  ASSERT_EQ(setenv("IN_ENV", "foo", 1), 0);
+  EXPECT_THAT(KvPairsFromEnv("in_env", {{"foo", "bar"}}),
+              testing::ElementsAre(testing::Pair("foo", "bar")));
+  unsetenv("IN_ENV");
+}
+
+TEST(KvPairsFromEnv, Single) {
+  ASSERT_EQ(setenv("IN_ENV", "foo=bar", 1), 0);
+  EXPECT_THAT(KvPairsFromEnv("in_env", {}),
+              testing::ElementsAre(testing::Pair("foo", "bar")));
+  unsetenv("IN_ENV");
+}
+
+TEST(KvPairsFromEnv, Multiple) {
+  ASSERT_EQ(setenv("IN_ENV", "foo=bar,baz=qux", 1), 0);
+  EXPECT_THAT(KvPairsFromEnv("in_env", {}),
+              testing::UnorderedElementsAre(testing::Pair("foo", "bar"),
+                                            testing::Pair("baz", "qux")));
+  unsetenv("IN_ENV");
+}
+
+}  // namespace
+}  // namespace benchmark
diff --git a/3rdparty/benchmark/test/complexity_test.cc b/3rdparty/benchmark/test/complexity_test.cc
new file mode 100644
index 00000000..1251cd44
--- /dev/null
+++ b/3rdparty/benchmark/test/complexity_test.cc
@@ -0,0 +1,226 @@
+#undef NDEBUG
+#include <algorithm>
+#include <cassert>
+#include <cmath>
+#include <cstdlib>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+#include "output_test.h"
+
+namespace {
+
+#define ADD_COMPLEXITY_CASES(...) \
+  int CONCAT(dummy, __LINE__) = AddComplexityTest(__VA_ARGS__)
+
+int AddComplexityTest(const std::string &test_name,
+                      const std::string &big_o_test_name,
+                      const std::string &rms_test_name,
+                      const std::string &big_o, int family_index) {
+  SetSubstitutions({{"%name", test_name},
+                    {"%bigo_name", big_o_test_name},
+                    {"%rms_name", rms_test_name},
+                    {"%bigo_str", "[ ]* %float " + big_o},
+                    {"%bigo", big_o},
+                    {"%rms", "[ ]*[0-9]+ %"}});
+  AddCases(
+      TC_ConsoleOut,
+      {{"^%bigo_name %bigo_str %bigo_str[ ]*$"},
+       {"^%bigo_name", MR_Not},  // Assert we we didn't only matched a name.
+       {"^%rms_name %rms %rms[ ]*$", MR_Next}});
+  AddCases(
+      TC_JSONOut,
+      {{"\"name\": \"%bigo_name\",$"},
+       {"\"family_index\": " + std::to_string(family_index) + ",$", MR_Next},
+       {"\"per_family_instance_index\": 0,$", MR_Next},
+       {"\"run_name\": \"%name\",$", MR_Next},
+       {"\"run_type\": \"aggregate\",$", MR_Next},
+       {"\"repetitions\": %int,$", MR_Next},
+       {"\"threads\": 1,$", MR_Next},
+       {"\"aggregate_name\": \"BigO\",$", MR_Next},
+       {"\"aggregate_unit\": \"time\",$", MR_Next},
+       {"\"cpu_coefficient\": %float,$", MR_Next},
+       {"\"real_coefficient\": %float,$", MR_Next},
+       {"\"big_o\": \"%bigo\",$", MR_Next},
+       {"\"time_unit\": \"ns\"$", MR_Next},
+       {"}", MR_Next},
+       {"\"name\": \"%rms_name\",$"},
+       {"\"family_index\": " + std::to_string(family_index) + ",$", MR_Next},
+       {"\"per_family_instance_index\": 0,$", MR_Next},
+       {"\"run_name\": \"%name\",$", MR_Next},
+       {"\"run_type\": \"aggregate\",$", MR_Next},
+       {"\"repetitions\": %int,$", MR_Next},
+       {"\"threads\": 1,$", MR_Next},
+       {"\"aggregate_name\": \"RMS\",$", MR_Next},
+       {"\"aggregate_unit\": \"percentage\",$", MR_Next},
+       {"\"rms\": %float$", MR_Next},
+       {"}", MR_Next}});
+  AddCases(TC_CSVOut, {{"^\"%bigo_name\",,%float,%float,%bigo,,,,,$"},
+                       {"^\"%bigo_name\"", MR_Not},
+                       {"^\"%rms_name\",,%float,%float,,,,,,$", MR_Next}});
+  return 0;
+}
+
+}  // end namespace
+
+// ========================================================================= //
+// --------------------------- Testing BigO O(1) --------------------------- //
+// ========================================================================= //
+
+void BM_Complexity_O1(benchmark::State &state) {
+  for (auto _ : state) {
+    for (int i = 0; i < 1024; ++i) {
+      benchmark::DoNotOptimize(&i);
+    }
+  }
+  state.SetComplexityN(state.range(0));
+}
+BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity(benchmark::o1);
+BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity();
+BENCHMARK(BM_Complexity_O1)
+    ->Range(1, 1 << 18)
+    ->Complexity([](benchmark::IterationCount) { return 1.0; });
+
+const char *one_test_name = "BM_Complexity_O1";
+const char *big_o_1_test_name = "BM_Complexity_O1_BigO";
+const char *rms_o_1_test_name = "BM_Complexity_O1_RMS";
+const char *enum_big_o_1 = "\\([0-9]+\\)";
+// FIXME: Tolerate both '(1)' and 'lgN' as output when the complexity is auto
+// deduced.
+// See https://github.com/google/benchmark/issues/272
+const char *auto_big_o_1 = "(\\([0-9]+\\))|(lgN)";
+const char *lambda_big_o_1 = "f\\(N\\)";
+
+// Add enum tests
+ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
+                     enum_big_o_1, /*family_index=*/0);
+
+// Add auto enum tests
+ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
+                     auto_big_o_1, /*family_index=*/1);
+
+// Add lambda tests
+ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
+                     lambda_big_o_1, /*family_index=*/2);
+
+// ========================================================================= //
+// --------------------------- Testing BigO O(N) --------------------------- //
+// ========================================================================= //
+
+std::vector<int> ConstructRandomVector(int64_t size) {
+  std::vector<int> v;
+  v.reserve(static_cast<int>(size));
+  for (int i = 0; i < size; ++i) {
+    v.push_back(static_cast<int>(std::rand() % size));
+  }
+  return v;
+}
+
+void BM_Complexity_O_N(benchmark::State &state) {
+  auto v = ConstructRandomVector(state.range(0));
+  // Test worst case scenario (item not in vector)
+  const int64_t item_not_in_vector = state.range(0) * 2;
+  for (auto _ : state) {
+    benchmark::DoNotOptimize(std::find(v.begin(), v.end(), item_not_in_vector));
+  }
+  state.SetComplexityN(state.range(0));
+}
+BENCHMARK(BM_Complexity_O_N)
+    ->RangeMultiplier(2)
+    ->Range(1 << 10, 1 << 16)
+    ->Complexity(benchmark::oN);
+BENCHMARK(BM_Complexity_O_N)
+    ->RangeMultiplier(2)
+    ->Range(1 << 10, 1 << 16)
+    ->Complexity([](benchmark::IterationCount n) -> double {
+      return static_cast<double>(n);
+    });
+BENCHMARK(BM_Complexity_O_N)
+    ->RangeMultiplier(2)
+    ->Range(1 << 10, 1 << 16)
+    ->Complexity();
+
+const char *n_test_name = "BM_Complexity_O_N";
+const char *big_o_n_test_name = "BM_Complexity_O_N_BigO";
+const char *rms_o_n_test_name = "BM_Complexity_O_N_RMS";
+const char *enum_auto_big_o_n = "N";
+const char *lambda_big_o_n = "f\\(N\\)";
+
+// Add enum tests
+ADD_COMPLEXITY_CASES(n_test_name, big_o_n_test_name, rms_o_n_test_name,
+                     enum_auto_big_o_n, /*family_index=*/3);
+
+// Add lambda tests
+ADD_COMPLEXITY_CASES(n_test_name, big_o_n_test_name, rms_o_n_test_name,
+                     lambda_big_o_n, /*family_index=*/4);
+
+// ========================================================================= //
+// ------------------------- Testing BigO O(N*lgN) ------------------------- //
+// ========================================================================= //
+
+static void BM_Complexity_O_N_log_N(benchmark::State &state) {
+  auto v = ConstructRandomVector(state.range(0));
+  for (auto _ : state) {
+    std::sort(v.begin(), v.end());
+  }
+  state.SetComplexityN(state.range(0));
+}
+static const double kLog2E = 1.44269504088896340736;
+BENCHMARK(BM_Complexity_O_N_log_N)
+    ->RangeMultiplier(2)
+    ->Range(1 << 10, 1 << 16)
+    ->Complexity(benchmark::oNLogN);
+BENCHMARK(BM_Complexity_O_N_log_N)
+    ->RangeMultiplier(2)
+    ->Range(1 << 10, 1 << 16)
+    ->Complexity([](benchmark::IterationCount n) {
+      return kLog2E * n * log(static_cast<double>(n));
+    });
+BENCHMARK(BM_Complexity_O_N_log_N)
+    ->RangeMultiplier(2)
+    ->Range(1 << 10, 1 << 16)
+    ->Complexity();
+
+const char *n_lg_n_test_name = "BM_Complexity_O_N_log_N";
+const char *big_o_n_lg_n_test_name = "BM_Complexity_O_N_log_N_BigO";
+const char *rms_o_n_lg_n_test_name = "BM_Complexity_O_N_log_N_RMS";
+const char *enum_auto_big_o_n_lg_n = "NlgN";
+const char *lambda_big_o_n_lg_n = "f\\(N\\)";
+
+// Add enum tests
+ADD_COMPLEXITY_CASES(n_lg_n_test_name, big_o_n_lg_n_test_name,
+                     rms_o_n_lg_n_test_name, enum_auto_big_o_n_lg_n,
+                     /*family_index=*/6);
+
+// Add lambda tests
+ADD_COMPLEXITY_CASES(n_lg_n_test_name, big_o_n_lg_n_test_name,
+                     rms_o_n_lg_n_test_name, lambda_big_o_n_lg_n,
+                     /*family_index=*/7);
+
+// ========================================================================= //
+// -------- Testing formatting of Complexity with captured args ------------ //
+// ========================================================================= //
+
+void BM_ComplexityCaptureArgs(benchmark::State &state, int n) {
+  for (auto _ : state) {
+    // This test requires a non-zero CPU time to avoid divide-by-zero
+    benchmark::DoNotOptimize(state.iterations());
+  }
+  state.SetComplexityN(n);
+}
+
+BENCHMARK_CAPTURE(BM_ComplexityCaptureArgs, capture_test, 100)
+    ->Complexity(benchmark::oN)
+    ->Ranges({{1, 2}, {3, 4}});
+
+const std::string complexity_capture_name =
+    "BM_ComplexityCaptureArgs/capture_test";
+
+ADD_COMPLEXITY_CASES(complexity_capture_name, complexity_capture_name + "_BigO",
+                     complexity_capture_name + "_RMS", "N", /*family_index=*/9);
+
+// ========================================================================= //
+// --------------------------- TEST CASES END ------------------------------ //
+// ========================================================================= //
+
+int main(int argc, char *argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/test/cxx03_test.cc b/3rdparty/benchmark/test/cxx03_test.cc
new file mode 100644
index 00000000..9711c1bd
--- /dev/null
+++ b/3rdparty/benchmark/test/cxx03_test.cc
@@ -0,0 +1,62 @@
+#undef NDEBUG
+#include <cassert>
+#include <cstddef>
+
+#include "benchmark/benchmark.h"
+
+#if __cplusplus >= 201103L
+#error C++11 or greater detected. Should be C++03.
+#endif
+
+#ifdef BENCHMARK_HAS_CXX11
+#error C++11 or greater detected by the library. BENCHMARK_HAS_CXX11 is defined.
+#endif
+
+void BM_empty(benchmark::State& state) {
+  while (state.KeepRunning()) {
+    volatile benchmark::IterationCount x = state.iterations();
+    ((void)x);
+  }
+}
+BENCHMARK(BM_empty);
+
+// The new C++11 interface for args/ranges requires initializer list support.
+// Therefore we provide the old interface to support C++03.
+void BM_old_arg_range_interface(benchmark::State& state) {
+  assert((state.range(0) == 1 && state.range(1) == 2) ||
+         (state.range(0) == 5 && state.range(1) == 6));
+  while (state.KeepRunning()) {
+  }
+}
+BENCHMARK(BM_old_arg_range_interface)->ArgPair(1, 2)->RangePair(5, 5, 6, 6);
+
+template <class T, class U>
+void BM_template2(benchmark::State& state) {
+  BM_empty(state);
+}
+BENCHMARK_TEMPLATE2(BM_template2, int, long);
+
+template <class T>
+void BM_template1(benchmark::State& state) {
+  BM_empty(state);
+}
+BENCHMARK_TEMPLATE(BM_template1, long);
+BENCHMARK_TEMPLATE1(BM_template1, int);
+
+template <class T>
+struct BM_Fixture : public ::benchmark::Fixture {};
+
+BENCHMARK_TEMPLATE_F(BM_Fixture, BM_template1, long)(benchmark::State& state) {
+  BM_empty(state);
+}
+BENCHMARK_TEMPLATE1_F(BM_Fixture, BM_template2, int)(benchmark::State& state) {
+  BM_empty(state);
+}
+
+void BM_counters(benchmark::State& state) {
+  BM_empty(state);
+  state.counters["Foo"] = 2;
+}
+BENCHMARK(BM_counters);
+
+BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/diagnostics_test.cc b/3rdparty/benchmark/test/diagnostics_test.cc
new file mode 100644
index 00000000..c54d5b0d
--- /dev/null
+++ b/3rdparty/benchmark/test/diagnostics_test.cc
@@ -0,0 +1,80 @@
+// Testing:
+//   State::PauseTiming()
+//   State::ResumeTiming()
+// Test that CHECK's within these function diagnose when they are called
+// outside of the KeepRunning() loop.
+//
+// NOTE: Users should NOT include or use src/check.h. This is only done in
+// order to test library internals.
+
+#include <cstdlib>
+#include <stdexcept>
+
+#include "../src/check.h"
+#include "benchmark/benchmark.h"
+
+#if defined(__GNUC__) && !defined(__EXCEPTIONS)
+#define TEST_HAS_NO_EXCEPTIONS
+#endif
+
+void TestHandler() {
+#ifndef TEST_HAS_NO_EXCEPTIONS
+  throw std::logic_error("");
+#else
+  std::abort();
+#endif
+}
+
+void try_invalid_pause_resume(benchmark::State& state) {
+#if !defined(TEST_BENCHMARK_LIBRARY_HAS_NO_ASSERTIONS) && \
+    !defined(TEST_HAS_NO_EXCEPTIONS)
+  try {
+    state.PauseTiming();
+    std::abort();
+  } catch (std::logic_error const&) {
+  }
+  try {
+    state.ResumeTiming();
+    std::abort();
+  } catch (std::logic_error const&) {
+  }
+#else
+  (void)state;  // avoid unused warning
+#endif
+}
+
+void BM_diagnostic_test(benchmark::State& state) {
+  static bool called_once = false;
+
+  if (called_once == false) try_invalid_pause_resume(state);
+
+  for (auto _ : state) {
+    benchmark::DoNotOptimize(state.iterations());
+  }
+
+  if (called_once == false) try_invalid_pause_resume(state);
+
+  called_once = true;
+}
+BENCHMARK(BM_diagnostic_test);
+
+void BM_diagnostic_test_keep_running(benchmark::State& state) {
+  static bool called_once = false;
+
+  if (called_once == false) try_invalid_pause_resume(state);
+
+  while (state.KeepRunning()) {
+    benchmark::DoNotOptimize(state.iterations());
+  }
+
+  if (called_once == false) try_invalid_pause_resume(state);
+
+  called_once = true;
+}
+BENCHMARK(BM_diagnostic_test_keep_running);
+
+int main(int argc, char* argv[]) {
+  benchmark::internal::GetAbortHandler() = &TestHandler;
+  benchmark::Initialize(&argc, argv);
+  benchmark::RunSpecifiedBenchmarks();
+}
diff --git a/3rdparty/benchmark/test/display_aggregates_only_test.cc b/3rdparty/benchmark/test/display_aggregates_only_test.cc
new file mode 100644
index 00000000..6ad65e7f
--- /dev/null
+++ b/3rdparty/benchmark/test/display_aggregates_only_test.cc
@@ -0,0 +1,45 @@
+
+#undef NDEBUG
+#include <cstdio>
+#include <string>
+
+#include "benchmark/benchmark.h"
+#include "output_test.h"
+
+// Ok this test is super ugly. We want to check what happens with the file
+// reporter in the presence of DisplayAggregatesOnly().
+// We do not care about console output, the normal tests check that already.
+
+void BM_SummaryRepeat(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->DisplayAggregatesOnly();
+
+int main(int argc, char* argv[]) {
+  const std::string output = GetFileReporterOutput(argc, argv);
+
+  if (SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3") != 7 ||
+      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3\"") != 3 ||
+      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_mean\"") != 1 ||
+      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_median\"") !=
+          1 ||
+      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\"") !=
+          1 ||
+      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_cv\"") != 1) {
+    std::cout << "Precondition mismatch. Expected to only find 8 "
+                 "occurrences of \"BM_SummaryRepeat/repeats:3\" substring:\n"
+                 "\"name\": \"BM_SummaryRepeat/repeats:3\", "
+                 "\"name\": \"BM_SummaryRepeat/repeats:3\", "
+                 "\"name\": \"BM_SummaryRepeat/repeats:3\", "
+                 "\"name\": \"BM_SummaryRepeat/repeats:3_mean\", "
+                 "\"name\": \"BM_SummaryRepeat/repeats:3_median\", "
+                 "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\", "
+                 "\"name\": \"BM_SummaryRepeat/repeats:3_cv\"\nThe entire "
+                 "output:\n";
+    std::cout << output;
+    return 1;
+  }
+
+  return 0;
+}
diff --git a/3rdparty/benchmark/test/donotoptimize_assembly_test.cc b/3rdparty/benchmark/test/donotoptimize_assembly_test.cc
new file mode 100644
index 00000000..2e86a51e
--- /dev/null
+++ b/3rdparty/benchmark/test/donotoptimize_assembly_test.cc
@@ -0,0 +1,161 @@
+#include <benchmark/benchmark.h>
+
+#ifdef __clang__
+#pragma clang diagnostic ignored "-Wreturn-type"
+#endif
+
+extern "C" {
+
+extern int ExternInt;
+extern int ExternInt2;
+extern int ExternInt3;
+
+inline int Add42(int x) { return x + 42; }
+
+struct NotTriviallyCopyable {
+  NotTriviallyCopyable();
+  explicit NotTriviallyCopyable(int x) : value(x) {}
+  NotTriviallyCopyable(NotTriviallyCopyable const &);
+  int value;
+};
+
+struct Large {
+  int value;
+  int data[2];
+};
+}
+// CHECK-LABEL: test_with_rvalue:
+extern "C" void test_with_rvalue() {
+  benchmark::DoNotOptimize(Add42(0));
+  // CHECK: movl $42, %eax
+  // CHECK: ret
+}
+
+// CHECK-LABEL: test_with_large_rvalue:
+extern "C" void test_with_large_rvalue() {
+  benchmark::DoNotOptimize(Large{ExternInt, {ExternInt, ExternInt}});
+  // CHECK: ExternInt(%rip)
+  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]]
+  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
+  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
+  // CHECK: ret
+}
+
+// CHECK-LABEL: test_with_non_trivial_rvalue:
+extern "C" void test_with_non_trivial_rvalue() {
+  benchmark::DoNotOptimize(NotTriviallyCopyable(ExternInt));
+  // CHECK: mov{{l|q}} ExternInt(%rip)
+  // CHECK: ret
+}
+
+// CHECK-LABEL: test_with_lvalue:
+extern "C" void test_with_lvalue() {
+  int x = 101;
+  benchmark::DoNotOptimize(x);
+  // CHECK-GNU: movl $101, %eax
+  // CHECK-CLANG: movl $101, -{{[0-9]+}}(%[[REG:[a-z]+]])
+  // CHECK: ret
+}
+
+// CHECK-LABEL: test_with_large_lvalue:
+extern "C" void test_with_large_lvalue() {
+  Large L{ExternInt, {ExternInt, ExternInt}};
+  benchmark::DoNotOptimize(L);
+  // CHECK: ExternInt(%rip)
+  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
+  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
+  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
+  // CHECK: ret
+}
+
+// CHECK-LABEL: test_with_non_trivial_lvalue:
+extern "C" void test_with_non_trivial_lvalue() {
+  NotTriviallyCopyable NTC(ExternInt);
+  benchmark::DoNotOptimize(NTC);
+  // CHECK: ExternInt(%rip)
+  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
+  // CHECK: ret
+}
+
+// CHECK-LABEL: test_with_const_lvalue:
+extern "C" void test_with_const_lvalue() {
+  const int x = 123;
+  benchmark::DoNotOptimize(x);
+  // CHECK: movl $123, %eax
+  // CHECK: ret
+}
+
+// CHECK-LABEL: test_with_large_const_lvalue:
+extern "C" void test_with_large_const_lvalue() {
+  const Large L{ExternInt, {ExternInt, ExternInt}};
+  benchmark::DoNotOptimize(L);
+  // CHECK: ExternInt(%rip)
+  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
+  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
+  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
+  // CHECK: ret
+}
+
+// CHECK-LABEL: test_with_non_trivial_const_lvalue:
+extern "C" void test_with_non_trivial_const_lvalue() {
+  const NotTriviallyCopyable Obj(ExternInt);
+  benchmark::DoNotOptimize(Obj);
+  // CHECK: mov{{q|l}} ExternInt(%rip)
+  // CHECK: ret
+}
+
+// CHECK-LABEL: test_div_by_two:
+extern "C" int test_div_by_two(int input) {
+  int divisor = 2;
+  benchmark::DoNotOptimize(divisor);
+  return input / divisor;
+  // CHECK: movl $2, [[DEST:.*]]
+  // CHECK: idivl [[DEST]]
+  // CHECK: ret
+}
+
+// CHECK-LABEL: test_inc_integer:
+extern "C" int test_inc_integer() {
+  int x = 0;
+  for (int i = 0; i < 5; ++i) benchmark::DoNotOptimize(++x);
+  // CHECK: movl $1, [[DEST:.*]]
+  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
+  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
+  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
+  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
+  // CHECK-CLANG: movl [[DEST]], %eax
+  // CHECK: ret
+  return x;
+}
+
+// CHECK-LABEL: test_pointer_rvalue
+extern "C" void test_pointer_rvalue() {
+  // CHECK: movl $42, [[DEST:.*]]
+  // CHECK: leaq [[DEST]], %rax
+  // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z]+]])
+  // CHECK: ret
+  int x = 42;
+  benchmark::DoNotOptimize(&x);
+}
+
+// CHECK-LABEL: test_pointer_const_lvalue:
+extern "C" void test_pointer_const_lvalue() {
+  // CHECK: movl $42, [[DEST:.*]]
+  // CHECK: leaq [[DEST]], %rax
+  // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z]+]])
+  // CHECK: ret
+  int x = 42;
+  int *const xp = &x;
+  benchmark::DoNotOptimize(xp);
+}
+
+// CHECK-LABEL: test_pointer_lvalue:
+extern "C" void test_pointer_lvalue() {
+  // CHECK: movl $42, [[DEST:.*]]
+  // CHECK: leaq [[DEST]], %rax
+  // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z+]+]])
+  // CHECK: ret
+  int x = 42;
+  int *xp = &x;
+  benchmark::DoNotOptimize(xp);
+}
diff --git a/3rdparty/benchmark/test/donotoptimize_test.cc b/3rdparty/benchmark/test/donotoptimize_test.cc
new file mode 100644
index 00000000..c321f156
--- /dev/null
+++ b/3rdparty/benchmark/test/donotoptimize_test.cc
@@ -0,0 +1,53 @@
+#include <cstdint>
+
+#include "benchmark/benchmark.h"
+
+namespace {
+#if defined(__GNUC__)
+std::uint64_t double_up(const std::uint64_t x) __attribute__((const));
+#endif
+std::uint64_t double_up(const std::uint64_t x) { return x * 2; }
+}  // namespace
+
+// Using DoNotOptimize on types like BitRef seem to cause a lot of problems
+// with the inline assembly on both GCC and Clang.
+struct BitRef {
+  int index;
+  unsigned char& byte;
+
+ public:
+  static BitRef Make() {
+    static unsigned char arr[2] = {};
+    BitRef b(1, arr[0]);
+    return b;
+  }
+
+ private:
+  BitRef(int i, unsigned char& b) : index(i), byte(b) {}
+};
+
+int main(int, char*[]) {
+  // this test verifies compilation of DoNotOptimize() for some types
+
+  char buffer8[8] = "";
+  benchmark::DoNotOptimize(buffer8);
+
+  char buffer20[20] = "";
+  benchmark::DoNotOptimize(buffer20);
+
+  char buffer1024[1024] = "";
+  benchmark::DoNotOptimize(buffer1024);
+  benchmark::DoNotOptimize(&buffer1024[0]);
+
+  int x = 123;
+  benchmark::DoNotOptimize(x);
+  benchmark::DoNotOptimize(&x);
+  benchmark::DoNotOptimize(x += 42);
+
+  benchmark::DoNotOptimize(double_up(x));
+
+  // These tests are to e
+  benchmark::DoNotOptimize(BitRef::Make());
+  BitRef lval = BitRef::Make();
+  benchmark::DoNotOptimize(lval);
+}
diff --git a/3rdparty/benchmark/test/filter_test.cc b/3rdparty/benchmark/test/filter_test.cc
new file mode 100644
index 00000000..a567de2d
--- /dev/null
+++ b/3rdparty/benchmark/test/filter_test.cc
@@ -0,0 +1,118 @@
+#include <algorithm>
+#include <cassert>
+#include <cmath>
+#include <cstdint>
+#include <cstdlib>
+#include <iostream>
+#include <limits>
+#include <sstream>
+#include <string>
+
+#include "benchmark/benchmark.h"
+
+namespace {
+
+class TestReporter : public benchmark::ConsoleReporter {
+ public:
+  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE {
+    return ConsoleReporter::ReportContext(context);
+  };
+
+  virtual void ReportRuns(const std::vector<Run>& report) BENCHMARK_OVERRIDE {
+    ++count_;
+    max_family_index_ =
+        std::max<size_t>(max_family_index_, report[0].family_index);
+    ConsoleReporter::ReportRuns(report);
+  };
+
+  TestReporter() : count_(0), max_family_index_(0) {}
+
+  virtual ~TestReporter() {}
+
+  size_t GetCount() const { return count_; }
+
+  size_t GetMaxFamilyIndex() const { return max_family_index_; }
+
+ private:
+  mutable size_t count_;
+  mutable size_t max_family_index_;
+};
+
+}  // end namespace
+
+static void NoPrefix(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(NoPrefix);
+
+static void BM_Foo(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_Foo);
+
+static void BM_Bar(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_Bar);
+
+static void BM_FooBar(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_FooBar);
+
+static void BM_FooBa(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_FooBa);
+
+int main(int argc, char** argv) {
+  bool list_only = false;
+  for (int i = 0; i < argc; ++i)
+    list_only |= std::string(argv[i]).find("--benchmark_list_tests") !=
+                 std::string::npos;
+
+  benchmark::Initialize(&argc, argv);
+
+  TestReporter test_reporter;
+  const size_t returned_count =
+      benchmark::RunSpecifiedBenchmarks(&test_reporter);
+
+  if (argc == 2) {
+    // Make sure we ran all of the tests
+    std::stringstream ss(argv[1]);
+    size_t expected_return;
+    ss >> expected_return;
+
+    if (returned_count != expected_return) {
+      std::cerr << "ERROR: Expected " << expected_return
+                << " tests to match the filter but returned_count = "
+                << returned_count << std::endl;
+      return -1;
+    }
+
+    const size_t expected_reports = list_only ? 0 : expected_return;
+    const size_t reports_count = test_reporter.GetCount();
+    if (reports_count != expected_reports) {
+      std::cerr << "ERROR: Expected " << expected_reports
+                << " tests to be run but reported_count = " << reports_count
+                << std::endl;
+      return -1;
+    }
+
+    const size_t max_family_index = test_reporter.GetMaxFamilyIndex();
+    const size_t num_families = reports_count == 0 ? 0 : 1 + max_family_index;
+    if (num_families != expected_reports) {
+      std::cerr << "ERROR: Expected " << expected_reports
+                << " test families to be run but num_families = "
+                << num_families << std::endl;
+      return -1;
+    }
+  }
+
+  return 0;
+}
diff --git a/3rdparty/benchmark/test/fixture_test.cc b/3rdparty/benchmark/test/fixture_test.cc
new file mode 100644
index 00000000..af650dbd
--- /dev/null
+++ b/3rdparty/benchmark/test/fixture_test.cc
@@ -0,0 +1,51 @@
+
+#include <cassert>
+#include <memory>
+
+#include "benchmark/benchmark.h"
+
+#define FIXTURE_BECHMARK_NAME MyFixture
+
+class FIXTURE_BECHMARK_NAME : public ::benchmark::Fixture {
+ public:
+  void SetUp(const ::benchmark::State& state) BENCHMARK_OVERRIDE {
+    if (state.thread_index() == 0) {
+      assert(data.get() == nullptr);
+      data.reset(new int(42));
+    }
+  }
+
+  void TearDown(const ::benchmark::State& state) BENCHMARK_OVERRIDE {
+    if (state.thread_index() == 0) {
+      assert(data.get() != nullptr);
+      data.reset();
+    }
+  }
+
+  ~FIXTURE_BECHMARK_NAME() { assert(data == nullptr); }
+
+  std::unique_ptr<int> data;
+};
+
+BENCHMARK_F(FIXTURE_BECHMARK_NAME, Foo)(benchmark::State& st) {
+  assert(data.get() != nullptr);
+  assert(*data == 42);
+  for (auto _ : st) {
+  }
+}
+
+BENCHMARK_DEFINE_F(FIXTURE_BECHMARK_NAME, Bar)(benchmark::State& st) {
+  if (st.thread_index() == 0) {
+    assert(data.get() != nullptr);
+    assert(*data == 42);
+  }
+  for (auto _ : st) {
+    assert(data.get() != nullptr);
+    assert(*data == 42);
+  }
+  st.SetItemsProcessed(st.range(0));
+}
+BENCHMARK_REGISTER_F(FIXTURE_BECHMARK_NAME, Bar)->Arg(42);
+BENCHMARK_REGISTER_F(FIXTURE_BECHMARK_NAME, Bar)->Arg(42)->ThreadPerCpu();
+
+BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/internal_threading_test.cc b/3rdparty/benchmark/test/internal_threading_test.cc
new file mode 100644
index 00000000..62b5b955
--- /dev/null
+++ b/3rdparty/benchmark/test/internal_threading_test.cc
@@ -0,0 +1,185 @@
+
+#undef NDEBUG
+
+#include <chrono>
+#include <thread>
+
+#include "../src/timers.h"
+#include "benchmark/benchmark.h"
+#include "output_test.h"
+
+static const std::chrono::duration<double, std::milli> time_frame(50);
+static const double time_frame_in_sec(
+    std::chrono::duration_cast<std::chrono::duration<double, std::ratio<1, 1>>>(
+        time_frame)
+        .count());
+
+void MyBusySpinwait() {
+  const auto start = benchmark::ChronoClockNow();
+
+  while (true) {
+    const auto now = benchmark::ChronoClockNow();
+    const auto elapsed = now - start;
+
+    if (std::chrono::duration<double, std::chrono::seconds::period>(elapsed) >=
+        time_frame)
+      return;
+  }
+}
+
+// ========================================================================= //
+// --------------------------- TEST CASES BEGIN ---------------------------- //
+// ========================================================================= //
+
+// ========================================================================= //
+// BM_MainThread
+
+void BM_MainThread(benchmark::State& state) {
+  for (auto _ : state) {
+    MyBusySpinwait();
+    state.SetIterationTime(time_frame_in_sec);
+  }
+  state.counters["invtime"] =
+      benchmark::Counter{1, benchmark::Counter::kIsRate};
+}
+
+BENCHMARK(BM_MainThread)->Iterations(1)->Threads(1);
+BENCHMARK(BM_MainThread)->Iterations(1)->Threads(1)->UseRealTime();
+BENCHMARK(BM_MainThread)->Iterations(1)->Threads(1)->UseManualTime();
+BENCHMARK(BM_MainThread)->Iterations(1)->Threads(1)->MeasureProcessCPUTime();
+BENCHMARK(BM_MainThread)
+    ->Iterations(1)
+    ->Threads(1)
+    ->MeasureProcessCPUTime()
+    ->UseRealTime();
+BENCHMARK(BM_MainThread)
+    ->Iterations(1)
+    ->Threads(1)
+    ->MeasureProcessCPUTime()
+    ->UseManualTime();
+
+BENCHMARK(BM_MainThread)->Iterations(1)->Threads(2);
+BENCHMARK(BM_MainThread)->Iterations(1)->Threads(2)->UseRealTime();
+BENCHMARK(BM_MainThread)->Iterations(1)->Threads(2)->UseManualTime();
+BENCHMARK(BM_MainThread)->Iterations(1)->Threads(2)->MeasureProcessCPUTime();
+BENCHMARK(BM_MainThread)
+    ->Iterations(1)
+    ->Threads(2)
+    ->MeasureProcessCPUTime()
+    ->UseRealTime();
+BENCHMARK(BM_MainThread)
+    ->Iterations(1)
+    ->Threads(2)
+    ->MeasureProcessCPUTime()
+    ->UseManualTime();
+
+// ========================================================================= //
+// BM_WorkerThread
+
+void BM_WorkerThread(benchmark::State& state) {
+  for (auto _ : state) {
+    std::thread Worker(&MyBusySpinwait);
+    Worker.join();
+    state.SetIterationTime(time_frame_in_sec);
+  }
+  state.counters["invtime"] =
+      benchmark::Counter{1, benchmark::Counter::kIsRate};
+}
+
+BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(1);
+BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(1)->UseRealTime();
+BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(1)->UseManualTime();
+BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(1)->MeasureProcessCPUTime();
+BENCHMARK(BM_WorkerThread)
+    ->Iterations(1)
+    ->Threads(1)
+    ->MeasureProcessCPUTime()
+    ->UseRealTime();
+BENCHMARK(BM_WorkerThread)
+    ->Iterations(1)
+    ->Threads(1)
+    ->MeasureProcessCPUTime()
+    ->UseManualTime();
+
+BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(2);
+BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(2)->UseRealTime();
+BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(2)->UseManualTime();
+BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(2)->MeasureProcessCPUTime();
+BENCHMARK(BM_WorkerThread)
+    ->Iterations(1)
+    ->Threads(2)
+    ->MeasureProcessCPUTime()
+    ->UseRealTime();
+BENCHMARK(BM_WorkerThread)
+    ->Iterations(1)
+    ->Threads(2)
+    ->MeasureProcessCPUTime()
+    ->UseManualTime();
+
+// ========================================================================= //
+// BM_MainThreadAndWorkerThread
+
+void BM_MainThreadAndWorkerThread(benchmark::State& state) {
+  for (auto _ : state) {
+    std::thread Worker(&MyBusySpinwait);
+    MyBusySpinwait();
+    Worker.join();
+    state.SetIterationTime(time_frame_in_sec);
+  }
+  state.counters["invtime"] =
+      benchmark::Counter{1, benchmark::Counter::kIsRate};
+}
+
+BENCHMARK(BM_MainThreadAndWorkerThread)->Iterations(1)->Threads(1);
+BENCHMARK(BM_MainThreadAndWorkerThread)
+    ->Iterations(1)
+    ->Threads(1)
+    ->UseRealTime();
+BENCHMARK(BM_MainThreadAndWorkerThread)
+    ->Iterations(1)
+    ->Threads(1)
+    ->UseManualTime();
+BENCHMARK(BM_MainThreadAndWorkerThread)
+    ->Iterations(1)
+    ->Threads(1)
+    ->MeasureProcessCPUTime();
+BENCHMARK(BM_MainThreadAndWorkerThread)
+    ->Iterations(1)
+    ->Threads(1)
+    ->MeasureProcessCPUTime()
+    ->UseRealTime();
+BENCHMARK(BM_MainThreadAndWorkerThread)
+    ->Iterations(1)
+    ->Threads(1)
+    ->MeasureProcessCPUTime()
+    ->UseManualTime();
+
+BENCHMARK(BM_MainThreadAndWorkerThread)->Iterations(1)->Threads(2);
+BENCHMARK(BM_MainThreadAndWorkerThread)
+    ->Iterations(1)
+    ->Threads(2)
+    ->UseRealTime();
+BENCHMARK(BM_MainThreadAndWorkerThread)
+    ->Iterations(1)
+    ->Threads(2)
+    ->UseManualTime();
+BENCHMARK(BM_MainThreadAndWorkerThread)
+    ->Iterations(1)
+    ->Threads(2)
+    ->MeasureProcessCPUTime();
+BENCHMARK(BM_MainThreadAndWorkerThread)
+    ->Iterations(1)
+    ->Threads(2)
+    ->MeasureProcessCPUTime()
+    ->UseRealTime();
+BENCHMARK(BM_MainThreadAndWorkerThread)
+    ->Iterations(1)
+    ->Threads(2)
+    ->MeasureProcessCPUTime()
+    ->UseManualTime();
+
+// ========================================================================= //
+// ---------------------------- TEST CASES END ----------------------------- //
+// ========================================================================= //
+
+int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/test/link_main_test.cc b/3rdparty/benchmark/test/link_main_test.cc
new file mode 100644
index 00000000..241ad5c3
--- /dev/null
+++ b/3rdparty/benchmark/test/link_main_test.cc
@@ -0,0 +1,8 @@
+#include "benchmark/benchmark.h"
+
+void BM_empty(benchmark::State& state) {
+  for (auto _ : state) {
+    benchmark::DoNotOptimize(state.iterations());
+  }
+}
+BENCHMARK(BM_empty);
diff --git a/3rdparty/benchmark/test/map_test.cc b/3rdparty/benchmark/test/map_test.cc
new file mode 100644
index 00000000..50961345
--- /dev/null
+++ b/3rdparty/benchmark/test/map_test.cc
@@ -0,0 +1,57 @@
+#include <cstdlib>
+#include <map>
+
+#include "benchmark/benchmark.h"
+
+namespace {
+
+std::map<int, int> ConstructRandomMap(int size) {
+  std::map<int, int> m;
+  for (int i = 0; i < size; ++i) {
+    m.insert(std::make_pair(std::rand() % size, std::rand() % size));
+  }
+  return m;
+}
+
+}  // namespace
+
+// Basic version.
+static void BM_MapLookup(benchmark::State& state) {
+  const int size = static_cast<int>(state.range(0));
+  std::map<int, int> m;
+  for (auto _ : state) {
+    state.PauseTiming();
+    m = ConstructRandomMap(size);
+    state.ResumeTiming();
+    for (int i = 0; i < size; ++i) {
+      benchmark::DoNotOptimize(m.find(std::rand() % size));
+    }
+  }
+  state.SetItemsProcessed(state.iterations() * size);
+}
+BENCHMARK(BM_MapLookup)->Range(1 << 3, 1 << 12);
+
+// Using fixtures.
+class MapFixture : public ::benchmark::Fixture {
+ public:
+  void SetUp(const ::benchmark::State& st) BENCHMARK_OVERRIDE {
+    m = ConstructRandomMap(static_cast<int>(st.range(0)));
+  }
+
+  void TearDown(const ::benchmark::State&) BENCHMARK_OVERRIDE { m.clear(); }
+
+  std::map<int, int> m;
+};
+
+BENCHMARK_DEFINE_F(MapFixture, Lookup)(benchmark::State& state) {
+  const int size = static_cast<int>(state.range(0));
+  for (auto _ : state) {
+    for (int i = 0; i < size; ++i) {
+      benchmark::DoNotOptimize(m.find(std::rand() % size));
+    }
+  }
+  state.SetItemsProcessed(state.iterations() * size);
+}
+BENCHMARK_REGISTER_F(MapFixture, Lookup)->Range(1 << 3, 1 << 12);
+
+BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/memory_manager_test.cc b/3rdparty/benchmark/test/memory_manager_test.cc
new file mode 100644
index 00000000..f0c192fc
--- /dev/null
+++ b/3rdparty/benchmark/test/memory_manager_test.cc
@@ -0,0 +1,46 @@
+#include <memory>
+
+#include "../src/check.h"
+#include "benchmark/benchmark.h"
+#include "output_test.h"
+
+class TestMemoryManager : public benchmark::MemoryManager {
+  void Start() BENCHMARK_OVERRIDE {}
+  void Stop(Result* result) BENCHMARK_OVERRIDE {
+    result->num_allocs = 42;
+    result->max_bytes_used = 42000;
+  }
+};
+
+void BM_empty(benchmark::State& state) {
+  for (auto _ : state) {
+    benchmark::DoNotOptimize(state.iterations());
+  }
+}
+BENCHMARK(BM_empty);
+
+ADD_CASES(TC_ConsoleOut, {{"^BM_empty %console_report$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_empty\",$"},
+                       {"\"family_index\": 0,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_empty\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\",$", MR_Next},
+                       {"\"allocs_per_iter\": %float,$", MR_Next},
+                       {"\"max_bytes_used\": 42000$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_empty\",%csv_report$"}});
+
+int main(int argc, char* argv[]) {
+  std::unique_ptr<benchmark::MemoryManager> mm(new TestMemoryManager());
+
+  benchmark::RegisterMemoryManager(mm.get());
+  RunOutputTests(argc, argv);
+  benchmark::RegisterMemoryManager(nullptr);
+}
diff --git a/3rdparty/benchmark/test/multiple_ranges_test.cc b/3rdparty/benchmark/test/multiple_ranges_test.cc
new file mode 100644
index 00000000..7618c4da
--- /dev/null
+++ b/3rdparty/benchmark/test/multiple_ranges_test.cc
@@ -0,0 +1,96 @@
+#include <cassert>
+#include <iostream>
+#include <set>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+
+class MultipleRangesFixture : public ::benchmark::Fixture {
+ public:
+  MultipleRangesFixture()
+      : expectedValues({{1, 3, 5},
+                        {1, 3, 8},
+                        {1, 3, 15},
+                        {2, 3, 5},
+                        {2, 3, 8},
+                        {2, 3, 15},
+                        {1, 4, 5},
+                        {1, 4, 8},
+                        {1, 4, 15},
+                        {2, 4, 5},
+                        {2, 4, 8},
+                        {2, 4, 15},
+                        {1, 7, 5},
+                        {1, 7, 8},
+                        {1, 7, 15},
+                        {2, 7, 5},
+                        {2, 7, 8},
+                        {2, 7, 15},
+                        {7, 6, 3}}) {}
+
+  void SetUp(const ::benchmark::State& state) BENCHMARK_OVERRIDE {
+    std::vector<int64_t> ranges = {state.range(0), state.range(1),
+                                   state.range(2)};
+
+    assert(expectedValues.find(ranges) != expectedValues.end());
+
+    actualValues.insert(ranges);
+  }
+
+  // NOTE: This is not TearDown as we want to check after _all_ runs are
+  // complete.
+  virtual ~MultipleRangesFixture() {
+    if (actualValues != expectedValues) {
+      std::cout << "EXPECTED\n";
+      for (const auto& v : expectedValues) {
+        std::cout << "{";
+        for (int64_t iv : v) {
+          std::cout << iv << ", ";
+        }
+        std::cout << "}\n";
+      }
+      std::cout << "ACTUAL\n";
+      for (const auto& v : actualValues) {
+        std::cout << "{";
+        for (int64_t iv : v) {
+          std::cout << iv << ", ";
+        }
+        std::cout << "}\n";
+      }
+    }
+  }
+
+  std::set<std::vector<int64_t>> expectedValues;
+  std::set<std::vector<int64_t>> actualValues;
+};
+
+BENCHMARK_DEFINE_F(MultipleRangesFixture, Empty)(benchmark::State& state) {
+  for (auto _ : state) {
+    int64_t product = state.range(0) * state.range(1) * state.range(2);
+    for (int64_t x = 0; x < product; x++) {
+      benchmark::DoNotOptimize(x);
+    }
+  }
+}
+
+BENCHMARK_REGISTER_F(MultipleRangesFixture, Empty)
+    ->RangeMultiplier(2)
+    ->Ranges({{1, 2}, {3, 7}, {5, 15}})
+    ->Args({7, 6, 3});
+
+void BM_CheckDefaultArgument(benchmark::State& state) {
+  // Test that the 'range()' without an argument is the same as 'range(0)'.
+  assert(state.range() == state.range(0));
+  assert(state.range() != state.range(1));
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_CheckDefaultArgument)->Ranges({{1, 5}, {6, 10}});
+
+static void BM_MultipleRanges(benchmark::State& st) {
+  for (auto _ : st) {
+  }
+}
+BENCHMARK(BM_MultipleRanges)->Ranges({{5, 5}, {6, 6}});
+
+BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/options_test.cc b/3rdparty/benchmark/test/options_test.cc
new file mode 100644
index 00000000..d424d40b
--- /dev/null
+++ b/3rdparty/benchmark/test/options_test.cc
@@ -0,0 +1,75 @@
+#include <chrono>
+#include <thread>
+
+#include "benchmark/benchmark.h"
+
+#if defined(NDEBUG)
+#undef NDEBUG
+#endif
+#include <cassert>
+
+void BM_basic(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+
+void BM_basic_slow(benchmark::State& state) {
+  std::chrono::milliseconds sleep_duration(state.range(0));
+  for (auto _ : state) {
+    std::this_thread::sleep_for(
+        std::chrono::duration_cast<std::chrono::nanoseconds>(sleep_duration));
+  }
+}
+
+BENCHMARK(BM_basic);
+BENCHMARK(BM_basic)->Arg(42);
+BENCHMARK(BM_basic_slow)->Arg(10)->Unit(benchmark::kNanosecond);
+BENCHMARK(BM_basic_slow)->Arg(100)->Unit(benchmark::kMicrosecond);
+BENCHMARK(BM_basic_slow)->Arg(1000)->Unit(benchmark::kMillisecond);
+BENCHMARK(BM_basic_slow)->Arg(1000)->Unit(benchmark::kSecond);
+BENCHMARK(BM_basic)->Range(1, 8);
+BENCHMARK(BM_basic)->RangeMultiplier(2)->Range(1, 8);
+BENCHMARK(BM_basic)->DenseRange(10, 15);
+BENCHMARK(BM_basic)->Args({42, 42});
+BENCHMARK(BM_basic)->Ranges({{64, 512}, {64, 512}});
+BENCHMARK(BM_basic)->MinTime(0.7);
+BENCHMARK(BM_basic)->UseRealTime();
+BENCHMARK(BM_basic)->ThreadRange(2, 4);
+BENCHMARK(BM_basic)->ThreadPerCpu();
+BENCHMARK(BM_basic)->Repetitions(3);
+BENCHMARK(BM_basic)
+    ->RangeMultiplier(std::numeric_limits<int>::max())
+    ->Range(std::numeric_limits<int64_t>::min(),
+            std::numeric_limits<int64_t>::max());
+
+// Negative ranges
+BENCHMARK(BM_basic)->Range(-64, -1);
+BENCHMARK(BM_basic)->RangeMultiplier(4)->Range(-8, 8);
+BENCHMARK(BM_basic)->DenseRange(-2, 2, 1);
+BENCHMARK(BM_basic)->Ranges({{-64, 1}, {-8, -1}});
+
+void CustomArgs(benchmark::internal::Benchmark* b) {
+  for (int i = 0; i < 10; ++i) {
+    b->Arg(i);
+  }
+}
+
+BENCHMARK(BM_basic)->Apply(CustomArgs);
+
+void BM_explicit_iteration_count(benchmark::State& state) {
+  // Test that benchmarks specified with an explicit iteration count are
+  // only run once.
+  static bool invoked_before = false;
+  assert(!invoked_before);
+  invoked_before = true;
+
+  // Test that the requested iteration count is respected.
+  assert(state.max_iterations == 42);
+  size_t actual_iterations = 0;
+  for (auto _ : state) ++actual_iterations;
+  assert(state.iterations() == state.max_iterations);
+  assert(state.iterations() == 42);
+}
+BENCHMARK(BM_explicit_iteration_count)->Iterations(42);
+
+BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/output_test.h b/3rdparty/benchmark/test/output_test.h
new file mode 100644
index 00000000..c6ff8ef2
--- /dev/null
+++ b/3rdparty/benchmark/test/output_test.h
@@ -0,0 +1,211 @@
+#ifndef TEST_OUTPUT_TEST_H
+#define TEST_OUTPUT_TEST_H
+
+#undef NDEBUG
+#include <functional>
+#include <initializer_list>
+#include <memory>
+#include <sstream>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "../src/re.h"
+#include "benchmark/benchmark.h"
+
+#define CONCAT2(x, y) x##y
+#define CONCAT(x, y) CONCAT2(x, y)
+
+#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = ::AddCases(__VA_ARGS__)
+
+#define SET_SUBSTITUTIONS(...) \
+  int CONCAT(dummy, __LINE__) = ::SetSubstitutions(__VA_ARGS__)
+
+enum MatchRules {
+  MR_Default,  // Skip non-matching lines until a match is found.
+  MR_Next,     // Match must occur on the next line.
+  MR_Not  // No line between the current position and the next match matches
+          // the regex
+};
+
+struct TestCase {
+  TestCase(std::string re, int rule = MR_Default);
+
+  std::string regex_str;
+  int match_rule;
+  std::string substituted_regex;
+  std::shared_ptr<benchmark::Regex> regex;
+};
+
+enum TestCaseID {
+  TC_ConsoleOut,
+  TC_ConsoleErr,
+  TC_JSONOut,
+  TC_JSONErr,
+  TC_CSVOut,
+  TC_CSVErr,
+
+  TC_NumID  // PRIVATE
+};
+
+// Add a list of test cases to be run against the output specified by
+// 'ID'
+int AddCases(TestCaseID ID, std::initializer_list<TestCase> il);
+
+// Add or set a list of substitutions to be performed on constructed regex's
+// See 'output_test_helper.cc' for a list of default substitutions.
+int SetSubstitutions(
+    std::initializer_list<std::pair<std::string, std::string>> il);
+
+// Run all output tests.
+void RunOutputTests(int argc, char* argv[]);
+
+// Count the number of 'pat' substrings in the 'haystack' string.
+int SubstrCnt(const std::string& haystack, const std::string& pat);
+
+// Run registered benchmarks with file reporter enabled, and return the content
+// outputted by the file reporter.
+std::string GetFileReporterOutput(int argc, char* argv[]);
+
+// ========================================================================= //
+// ------------------------- Results checking ------------------------------ //
+// ========================================================================= //
+
+// Call this macro to register a benchmark for checking its results. This
+// should be all that's needed. It subscribes a function to check the (CSV)
+// results of a benchmark. This is done only after verifying that the output
+// strings are really as expected.
+// bm_name_pattern: a name or a regex pattern which will be matched against
+//                  all the benchmark names. Matching benchmarks
+//                  will be the subject of a call to checker_function
+// checker_function: should be of type ResultsCheckFn (see below)
+#define CHECK_BENCHMARK_RESULTS(bm_name_pattern, checker_function) \
+  size_t CONCAT(dummy, __LINE__) = AddChecker(bm_name_pattern, checker_function)
+
+struct Results;
+typedef std::function<void(Results const&)> ResultsCheckFn;
+
+size_t AddChecker(const char* bm_name_pattern, const ResultsCheckFn& fn);
+
+// Class holding the results of a benchmark.
+// It is passed in calls to checker functions.
+struct Results {
+  // the benchmark name
+  std::string name;
+  // the benchmark fields
+  std::map<std::string, std::string> values;
+
+  Results(const std::string& n) : name(n) {}
+
+  int NumThreads() const;
+
+  double NumIterations() const;
+
+  typedef enum { kCpuTime, kRealTime } BenchmarkTime;
+
+  // get cpu_time or real_time in seconds
+  double GetTime(BenchmarkTime which) const;
+
+  // get the real_time duration of the benchmark in seconds.
+  // it is better to use fuzzy float checks for this, as the float
+  // ASCII formatting is lossy.
+  double DurationRealTime() const {
+    return NumIterations() * GetTime(kRealTime);
+  }
+  // get the cpu_time duration of the benchmark in seconds
+  double DurationCPUTime() const { return NumIterations() * GetTime(kCpuTime); }
+
+  // get the string for a result by name, or nullptr if the name
+  // is not found
+  const std::string* Get(const char* entry_name) const {
+    auto it = values.find(entry_name);
+    if (it == values.end()) return nullptr;
+    return &it->second;
+  }
+
+  // get a result by name, parsed as a specific type.
+  // NOTE: for counters, use GetCounterAs instead.
+  template <class T>
+  T GetAs(const char* entry_name) const;
+
+  // counters are written as doubles, so they have to be read first
+  // as a double, and only then converted to the asked type.
+  template <class T>
+  T GetCounterAs(const char* entry_name) const {
+    double dval = GetAs<double>(entry_name);
+    T tval = static_cast<T>(dval);
+    return tval;
+  }
+};
+
+template <class T>
+T Results::GetAs(const char* entry_name) const {
+  auto* sv = Get(entry_name);
+  BM_CHECK(sv != nullptr && !sv->empty());
+  std::stringstream ss;
+  ss << *sv;
+  T out;
+  ss >> out;
+  BM_CHECK(!ss.fail());
+  return out;
+}
+
+//----------------------------------
+// Macros to help in result checking. Do not use them with arguments causing
+// side-effects.
+
+// clang-format off
+
+#define CHECK_RESULT_VALUE_IMPL(entry, getfn, var_type, var_name, relationship, value) \
+    CONCAT(BM_CHECK_, relationship)                                        \
+    (entry.getfn< var_type >(var_name), (value)) << "\n"                \
+    << __FILE__ << ":" << __LINE__ << ": " << (entry).name << ":\n"     \
+    << __FILE__ << ":" << __LINE__ << ": "                              \
+    << "expected (" << #var_type << ")" << (var_name)                   \
+    << "=" << (entry).getfn< var_type >(var_name)                       \
+    << " to be " #relationship " to " << (value) << "\n"
+
+// check with tolerance. eps_factor is the tolerance window, which is
+// interpreted relative to value (eg, 0.1 means 10% of value).
+#define CHECK_FLOAT_RESULT_VALUE_IMPL(entry, getfn, var_type, var_name, relationship, value, eps_factor) \
+    CONCAT(BM_CHECK_FLOAT_, relationship)                                  \
+    (entry.getfn< var_type >(var_name), (value), (eps_factor) * (value)) << "\n" \
+    << __FILE__ << ":" << __LINE__ << ": " << (entry).name << ":\n"     \
+    << __FILE__ << ":" << __LINE__ << ": "                              \
+    << "expected (" << #var_type << ")" << (var_name)                   \
+    << "=" << (entry).getfn< var_type >(var_name)                       \
+    << " to be " #relationship " to " << (value) << "\n"                \
+    << __FILE__ << ":" << __LINE__ << ": "                              \
+    << "with tolerance of " << (eps_factor) * (value)                   \
+    << " (" << (eps_factor)*100. << "%), "                              \
+    << "but delta was " << ((entry).getfn< var_type >(var_name) - (value)) \
+    << " (" << (((entry).getfn< var_type >(var_name) - (value))         \
+               /                                                        \
+               ((value) > 1.e-5 || value < -1.e-5 ? value : 1.e-5)*100.) \
+    << "%)"
+
+#define CHECK_RESULT_VALUE(entry, var_type, var_name, relationship, value) \
+    CHECK_RESULT_VALUE_IMPL(entry, GetAs, var_type, var_name, relationship, value)
+
+#define CHECK_COUNTER_VALUE(entry, var_type, var_name, relationship, value) \
+    CHECK_RESULT_VALUE_IMPL(entry, GetCounterAs, var_type, var_name, relationship, value)
+
+#define CHECK_FLOAT_RESULT_VALUE(entry, var_name, relationship, value, eps_factor) \
+    CHECK_FLOAT_RESULT_VALUE_IMPL(entry, GetAs, double, var_name, relationship, value, eps_factor)
+
+#define CHECK_FLOAT_COUNTER_VALUE(entry, var_name, relationship, value, eps_factor) \
+    CHECK_FLOAT_RESULT_VALUE_IMPL(entry, GetCounterAs, double, var_name, relationship, value, eps_factor)
+
+// clang-format on
+
+// ========================================================================= //
+// --------------------------- Misc Utilities ------------------------------ //
+// ========================================================================= //
+
+namespace {
+
+const char* const dec_re = "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?";
+
+}  //  end namespace
+
+#endif  // TEST_OUTPUT_TEST_H
diff --git a/3rdparty/benchmark/test/output_test_helper.cc b/3rdparty/benchmark/test/output_test_helper.cc
new file mode 100644
index 00000000..81584cbf
--- /dev/null
+++ b/3rdparty/benchmark/test/output_test_helper.cc
@@ -0,0 +1,517 @@
+#include <cstdio>
+#include <cstring>
+#include <fstream>
+#include <iostream>
+#include <map>
+#include <memory>
+#include <random>
+#include <sstream>
+#include <streambuf>
+
+#include "../src/benchmark_api_internal.h"
+#include "../src/check.h"  // NOTE: check.h is for internal use only!
+#include "../src/log.h"    // NOTE: log.h is for internal use only
+#include "../src/re.h"     // NOTE: re.h is for internal use only
+#include "output_test.h"
+
+// ========================================================================= //
+// ------------------------------ Internals -------------------------------- //
+// ========================================================================= //
+namespace internal {
+namespace {
+
+using TestCaseList = std::vector<TestCase>;
+
+// Use a vector because the order elements are added matters during iteration.
+// std::map/unordered_map don't guarantee that.
+// For example:
+//  SetSubstitutions({{"%HelloWorld", "Hello"}, {"%Hello", "Hi"}});
+//     Substitute("%HelloWorld") // Always expands to Hello.
+using SubMap = std::vector<std::pair<std::string, std::string>>;
+
+TestCaseList& GetTestCaseList(TestCaseID ID) {
+  // Uses function-local statics to ensure initialization occurs
+  // before first use.
+  static TestCaseList lists[TC_NumID];
+  return lists[ID];
+}
+
+SubMap& GetSubstitutions() {
+  // Don't use 'dec_re' from header because it may not yet be initialized.
+  // clang-format off
+  static std::string safe_dec_re = "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?";
+  static std::string time_re = "([0-9]+[.])?[0-9]+";
+  static std::string percentage_re = "[0-9]+[.][0-9]{2}";
+  static SubMap map = {
+      {"%float", "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?"},
+      // human-readable float
+      {"%hrfloat", "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?[kMGTPEZYmunpfazy]?"},
+      {"%percentage", percentage_re},
+      {"%int", "[ ]*[0-9]+"},
+      {" %s ", "[ ]+"},
+      {"%time", "[ ]*" + time_re + "[ ]+ns"},
+      {"%console_report", "[ ]*" + time_re + "[ ]+ns [ ]*" + time_re + "[ ]+ns [ ]*[0-9]+"},
+      {"%console_percentage_report", "[ ]*" + percentage_re + "[ ]+% [ ]*" + percentage_re + "[ ]+% [ ]*[0-9]+"},
+      {"%console_us_report", "[ ]*" + time_re + "[ ]+us [ ]*" + time_re + "[ ]+us [ ]*[0-9]+"},
+      {"%console_ms_report", "[ ]*" + time_re + "[ ]+ms [ ]*" + time_re + "[ ]+ms [ ]*[0-9]+"},
+      {"%console_s_report", "[ ]*" + time_re + "[ ]+s [ ]*" + time_re + "[ ]+s [ ]*[0-9]+"},
+      {"%console_time_only_report", "[ ]*" + time_re + "[ ]+ns [ ]*" + time_re + "[ ]+ns"},
+      {"%console_us_report", "[ ]*" + time_re + "[ ]+us [ ]*" + time_re + "[ ]+us [ ]*[0-9]+"},
+      {"%console_us_time_only_report", "[ ]*" + time_re + "[ ]+us [ ]*" + time_re + "[ ]+us"},
+      {"%csv_header",
+       "name,iterations,real_time,cpu_time,time_unit,bytes_per_second,"
+       "items_per_second,label,error_occurred,error_message"},
+      {"%csv_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,,,,,"},
+      {"%csv_us_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",us,,,,,"},
+      {"%csv_ms_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ms,,,,,"},
+      {"%csv_s_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",s,,,,,"},
+      {"%csv_bytes_report",
+       "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns," + safe_dec_re + ",,,,"},
+      {"%csv_items_report",
+       "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,," + safe_dec_re + ",,,"},
+      {"%csv_bytes_items_report",
+       "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns," + safe_dec_re +
+       "," + safe_dec_re + ",,,"},
+      {"%csv_label_report_begin", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,,,"},
+      {"%csv_label_report_end", ",,"}};
+  // clang-format on
+  return map;
+}
+
+std::string PerformSubstitutions(std::string source) {
+  SubMap const& subs = GetSubstitutions();
+  using SizeT = std::string::size_type;
+  for (auto const& KV : subs) {
+    SizeT pos;
+    SizeT next_start = 0;
+    while ((pos = source.find(KV.first, next_start)) != std::string::npos) {
+      next_start = pos + KV.second.size();
+      source.replace(pos, KV.first.size(), KV.second);
+    }
+  }
+  return source;
+}
+
+void CheckCase(std::stringstream& remaining_output, TestCase const& TC,
+               TestCaseList const& not_checks) {
+  std::string first_line;
+  bool on_first = true;
+  std::string line;
+  while (remaining_output.eof() == false) {
+    BM_CHECK(remaining_output.good());
+    std::getline(remaining_output, line);
+    if (on_first) {
+      first_line = line;
+      on_first = false;
+    }
+    for (const auto& NC : not_checks) {
+      BM_CHECK(!NC.regex->Match(line))
+          << "Unexpected match for line \"" << line << "\" for MR_Not regex \""
+          << NC.regex_str << "\""
+          << "\n    actual regex string \"" << TC.substituted_regex << "\""
+          << "\n    started matching near: " << first_line;
+    }
+    if (TC.regex->Match(line)) return;
+    BM_CHECK(TC.match_rule != MR_Next)
+        << "Expected line \"" << line << "\" to match regex \"" << TC.regex_str
+        << "\""
+        << "\n    actual regex string \"" << TC.substituted_regex << "\""
+        << "\n    started matching near: " << first_line;
+  }
+  BM_CHECK(remaining_output.eof() == false)
+      << "End of output reached before match for regex \"" << TC.regex_str
+      << "\" was found"
+      << "\n    actual regex string \"" << TC.substituted_regex << "\""
+      << "\n    started matching near: " << first_line;
+}
+
+void CheckCases(TestCaseList const& checks, std::stringstream& output) {
+  std::vector<TestCase> not_checks;
+  for (size_t i = 0; i < checks.size(); ++i) {
+    const auto& TC = checks[i];
+    if (TC.match_rule == MR_Not) {
+      not_checks.push_back(TC);
+      continue;
+    }
+    CheckCase(output, TC, not_checks);
+    not_checks.clear();
+  }
+}
+
+class TestReporter : public benchmark::BenchmarkReporter {
+ public:
+  TestReporter(std::vector<benchmark::BenchmarkReporter*> reps)
+      : reporters_(std::move(reps)) {}
+
+  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE {
+    bool last_ret = false;
+    bool first = true;
+    for (auto rep : reporters_) {
+      bool new_ret = rep->ReportContext(context);
+      BM_CHECK(first || new_ret == last_ret)
+          << "Reports return different values for ReportContext";
+      first = false;
+      last_ret = new_ret;
+    }
+    (void)first;
+    return last_ret;
+  }
+
+  void ReportRuns(const std::vector<Run>& report) BENCHMARK_OVERRIDE {
+    for (auto rep : reporters_) rep->ReportRuns(report);
+  }
+  void Finalize() BENCHMARK_OVERRIDE {
+    for (auto rep : reporters_) rep->Finalize();
+  }
+
+ private:
+  std::vector<benchmark::BenchmarkReporter*> reporters_;
+};
+}  // namespace
+
+}  // end namespace internal
+
+// ========================================================================= //
+// -------------------------- Results checking ----------------------------- //
+// ========================================================================= //
+
+namespace internal {
+
+// Utility class to manage subscribers for checking benchmark results.
+// It works by parsing the CSV output to read the results.
+class ResultsChecker {
+ public:
+  struct PatternAndFn : public TestCase {  // reusing TestCase for its regexes
+    PatternAndFn(const std::string& rx, ResultsCheckFn fn_)
+        : TestCase(rx), fn(std::move(fn_)) {}
+    ResultsCheckFn fn;
+  };
+
+  std::vector<PatternAndFn> check_patterns;
+  std::vector<Results> results;
+  std::vector<std::string> field_names;
+
+  void Add(const std::string& entry_pattern, const ResultsCheckFn& fn);
+
+  void CheckResults(std::stringstream& output);
+
+ private:
+  void SetHeader_(const std::string& csv_header);
+  void SetValues_(const std::string& entry_csv_line);
+
+  std::vector<std::string> SplitCsv_(const std::string& line);
+};
+
+// store the static ResultsChecker in a function to prevent initialization
+// order problems
+ResultsChecker& GetResultsChecker() {
+  static ResultsChecker rc;
+  return rc;
+}
+
+// add a results checker for a benchmark
+void ResultsChecker::Add(const std::string& entry_pattern,
+                         const ResultsCheckFn& fn) {
+  check_patterns.emplace_back(entry_pattern, fn);
+}
+
+// check the results of all subscribed benchmarks
+void ResultsChecker::CheckResults(std::stringstream& output) {
+  // first reset the stream to the start
+  {
+    auto start = std::stringstream::pos_type(0);
+    // clear before calling tellg()
+    output.clear();
+    // seek to zero only when needed
+    if (output.tellg() > start) output.seekg(start);
+    // and just in case
+    output.clear();
+  }
+  // now go over every line and publish it to the ResultsChecker
+  std::string line;
+  bool on_first = true;
+  while (output.eof() == false) {
+    BM_CHECK(output.good());
+    std::getline(output, line);
+    if (on_first) {
+      SetHeader_(line);  // this is important
+      on_first = false;
+      continue;
+    }
+    SetValues_(line);
+  }
+  // finally we can call the subscribed check functions
+  for (const auto& p : check_patterns) {
+    BM_VLOG(2) << "--------------------------------\n";
+    BM_VLOG(2) << "checking for benchmarks matching " << p.regex_str << "...\n";
+    for (const auto& r : results) {
+      if (!p.regex->Match(r.name)) {
+        BM_VLOG(2) << p.regex_str << " is not matched by " << r.name << "\n";
+        continue;
+      } else {
+        BM_VLOG(2) << p.regex_str << " is matched by " << r.name << "\n";
+      }
+      BM_VLOG(1) << "Checking results of " << r.name << ": ... \n";
+      p.fn(r);
+      BM_VLOG(1) << "Checking results of " << r.name << ": OK.\n";
+    }
+  }
+}
+
+// prepare for the names in this header
+void ResultsChecker::SetHeader_(const std::string& csv_header) {
+  field_names = SplitCsv_(csv_header);
+}
+
+// set the values for a benchmark
+void ResultsChecker::SetValues_(const std::string& entry_csv_line) {
+  if (entry_csv_line.empty()) return;  // some lines are empty
+  BM_CHECK(!field_names.empty());
+  auto vals = SplitCsv_(entry_csv_line);
+  BM_CHECK_EQ(vals.size(), field_names.size());
+  results.emplace_back(vals[0]);  // vals[0] is the benchmark name
+  auto& entry = results.back();
+  for (size_t i = 1, e = vals.size(); i < e; ++i) {
+    entry.values[field_names[i]] = vals[i];
+  }
+}
+
+// a quick'n'dirty csv splitter (eliminating quotes)
+std::vector<std::string> ResultsChecker::SplitCsv_(const std::string& line) {
+  std::vector<std::string> out;
+  if (line.empty()) return out;
+  if (!field_names.empty()) out.reserve(field_names.size());
+  size_t prev = 0, pos = line.find_first_of(','), curr = pos;
+  while (pos != line.npos) {
+    BM_CHECK(curr > 0);
+    if (line[prev] == '"') ++prev;
+    if (line[curr - 1] == '"') --curr;
+    out.push_back(line.substr(prev, curr - prev));
+    prev = pos + 1;
+    pos = line.find_first_of(',', pos + 1);
+    curr = pos;
+  }
+  curr = line.size();
+  if (line[prev] == '"') ++prev;
+  if (line[curr - 1] == '"') --curr;
+  out.push_back(line.substr(prev, curr - prev));
+  return out;
+}
+
+}  // end namespace internal
+
+size_t AddChecker(const char* bm_name, const ResultsCheckFn& fn) {
+  auto& rc = internal::GetResultsChecker();
+  rc.Add(bm_name, fn);
+  return rc.results.size();
+}
+
+int Results::NumThreads() const {
+  auto pos = name.find("/threads:");
+  if (pos == name.npos) return 1;
+  auto end = name.find('/', pos + 9);
+  std::stringstream ss;
+  ss << name.substr(pos + 9, end);
+  int num = 1;
+  ss >> num;
+  BM_CHECK(!ss.fail());
+  return num;
+}
+
+double Results::NumIterations() const { return GetAs<double>("iterations"); }
+
+double Results::GetTime(BenchmarkTime which) const {
+  BM_CHECK(which == kCpuTime || which == kRealTime);
+  const char* which_str = which == kCpuTime ? "cpu_time" : "real_time";
+  double val = GetAs<double>(which_str);
+  auto unit = Get("time_unit");
+  BM_CHECK(unit);
+  if (*unit == "ns") {
+    return val * 1.e-9;
+  } else if (*unit == "us") {
+    return val * 1.e-6;
+  } else if (*unit == "ms") {
+    return val * 1.e-3;
+  } else if (*unit == "s") {
+    return val;
+  } else {
+    BM_CHECK(1 == 0) << "unknown time unit: " << *unit;
+    return 0;
+  }
+}
+
+// ========================================================================= //
+// -------------------------- Public API Definitions------------------------ //
+// ========================================================================= //
+
+TestCase::TestCase(std::string re, int rule)
+    : regex_str(std::move(re)),
+      match_rule(rule),
+      substituted_regex(internal::PerformSubstitutions(regex_str)),
+      regex(std::make_shared<benchmark::Regex>()) {
+  std::string err_str;
+  regex->Init(substituted_regex, &err_str);
+  BM_CHECK(err_str.empty())
+      << "Could not construct regex \"" << substituted_regex << "\""
+      << "\n    originally \"" << regex_str << "\""
+      << "\n    got error: " << err_str;
+}
+
+int AddCases(TestCaseID ID, std::initializer_list<TestCase> il) {
+  auto& L = internal::GetTestCaseList(ID);
+  L.insert(L.end(), il);
+  return 0;
+}
+
+int SetSubstitutions(
+    std::initializer_list<std::pair<std::string, std::string>> il) {
+  auto& subs = internal::GetSubstitutions();
+  for (auto KV : il) {
+    bool exists = false;
+    KV.second = internal::PerformSubstitutions(KV.second);
+    for (auto& EKV : subs) {
+      if (EKV.first == KV.first) {
+        EKV.second = std::move(KV.second);
+        exists = true;
+        break;
+      }
+    }
+    if (!exists) subs.push_back(std::move(KV));
+  }
+  return 0;
+}
+
+// Disable deprecated warnings temporarily because we need to reference
+// CSVReporter but don't want to trigger -Werror=-Wdeprecated-declarations
+BENCHMARK_DISABLE_DEPRECATED_WARNING
+
+void RunOutputTests(int argc, char* argv[]) {
+  using internal::GetTestCaseList;
+  benchmark::Initialize(&argc, argv);
+  auto options = benchmark::internal::GetOutputOptions(/*force_no_color*/ true);
+  benchmark::ConsoleReporter CR(options);
+  benchmark::JSONReporter JR;
+  benchmark::CSVReporter CSVR;
+  struct ReporterTest {
+    const char* name;
+    std::vector<TestCase>& output_cases;
+    std::vector<TestCase>& error_cases;
+    benchmark::BenchmarkReporter& reporter;
+    std::stringstream out_stream;
+    std::stringstream err_stream;
+
+    ReporterTest(const char* n, std::vector<TestCase>& out_tc,
+                 std::vector<TestCase>& err_tc,
+                 benchmark::BenchmarkReporter& br)
+        : name(n), output_cases(out_tc), error_cases(err_tc), reporter(br) {
+      reporter.SetOutputStream(&out_stream);
+      reporter.SetErrorStream(&err_stream);
+    }
+  } TestCases[] = {
+      {"ConsoleReporter", GetTestCaseList(TC_ConsoleOut),
+       GetTestCaseList(TC_ConsoleErr), CR},
+      {"JSONReporter", GetTestCaseList(TC_JSONOut), GetTestCaseList(TC_JSONErr),
+       JR},
+      {"CSVReporter", GetTestCaseList(TC_CSVOut), GetTestCaseList(TC_CSVErr),
+       CSVR},
+  };
+
+  // Create the test reporter and run the benchmarks.
+  std::cout << "Running benchmarks...\n";
+  internal::TestReporter test_rep({&CR, &JR, &CSVR});
+  benchmark::RunSpecifiedBenchmarks(&test_rep);
+
+  for (auto& rep_test : TestCases) {
+    std::string msg = std::string("\nTesting ") + rep_test.name + " Output\n";
+    std::string banner(msg.size() - 1, '-');
+    std::cout << banner << msg << banner << "\n";
+
+    std::cerr << rep_test.err_stream.str();
+    std::cout << rep_test.out_stream.str();
+
+    internal::CheckCases(rep_test.error_cases, rep_test.err_stream);
+    internal::CheckCases(rep_test.output_cases, rep_test.out_stream);
+
+    std::cout << "\n";
+  }
+
+  // now that we know the output is as expected, we can dispatch
+  // the checks to subscribees.
+  auto& csv = TestCases[2];
+  // would use == but gcc spits a warning
+  BM_CHECK(std::strcmp(csv.name, "CSVReporter") == 0);
+  internal::GetResultsChecker().CheckResults(csv.out_stream);
+}
+
+BENCHMARK_RESTORE_DEPRECATED_WARNING
+
+int SubstrCnt(const std::string& haystack, const std::string& pat) {
+  if (pat.length() == 0) return 0;
+  int count = 0;
+  for (size_t offset = haystack.find(pat); offset != std::string::npos;
+       offset = haystack.find(pat, offset + pat.length()))
+    ++count;
+  return count;
+}
+
+static char ToHex(int ch) {
+  return ch < 10 ? static_cast<char>('0' + ch)
+                 : static_cast<char>('a' + (ch - 10));
+}
+
+static char RandomHexChar() {
+  static std::mt19937 rd{std::random_device{}()};
+  static std::uniform_int_distribution<int> mrand{0, 15};
+  return ToHex(mrand(rd));
+}
+
+static std::string GetRandomFileName() {
+  std::string model = "test.%%%%%%";
+  for (auto& ch : model) {
+    if (ch == '%') ch = RandomHexChar();
+  }
+  return model;
+}
+
+static bool FileExists(std::string const& name) {
+  std::ifstream in(name.c_str());
+  return in.good();
+}
+
+static std::string GetTempFileName() {
+  // This function attempts to avoid race conditions where two tests
+  // create the same file at the same time. However, it still introduces races
+  // similar to tmpnam.
+  int retries = 3;
+  while (--retries) {
+    std::string name = GetRandomFileName();
+    if (!FileExists(name)) return name;
+  }
+  std::cerr << "Failed to create unique temporary file name" << std::endl;
+  std::abort();
+}
+
+std::string GetFileReporterOutput(int argc, char* argv[]) {
+  std::vector<char*> new_argv(argv, argv + argc);
+  assert(static_cast<decltype(new_argv)::size_type>(argc) == new_argv.size());
+
+  std::string tmp_file_name = GetTempFileName();
+  std::cout << "Will be using this as the tmp file: " << tmp_file_name << '\n';
+
+  std::string tmp = "--benchmark_out=";
+  tmp += tmp_file_name;
+  new_argv.emplace_back(const_cast<char*>(tmp.c_str()));
+
+  argc = int(new_argv.size());
+
+  benchmark::Initialize(&argc, new_argv.data());
+  benchmark::RunSpecifiedBenchmarks();
+
+  // Read the output back from the file, and delete the file.
+  std::ifstream tmp_stream(tmp_file_name);
+  std::string output = std::string((std::istreambuf_iterator<char>(tmp_stream)),
+                                   std::istreambuf_iterator<char>());
+  std::remove(tmp_file_name.c_str());
+
+  return output;
+}
diff --git a/3rdparty/benchmark/test/perf_counters_gtest.cc b/3rdparty/benchmark/test/perf_counters_gtest.cc
new file mode 100644
index 00000000..3eac6246
--- /dev/null
+++ b/3rdparty/benchmark/test/perf_counters_gtest.cc
@@ -0,0 +1,145 @@
+#include <thread>
+
+#include "../src/perf_counters.h"
+#include "gtest/gtest.h"
+
+#ifndef GTEST_SKIP
+struct MsgHandler {
+  void operator=(std::ostream&) {}
+};
+#define GTEST_SKIP() return MsgHandler() = std::cout
+#endif
+
+using benchmark::internal::PerfCounters;
+using benchmark::internal::PerfCounterValues;
+
+namespace {
+const char kGenericPerfEvent1[] = "CYCLES";
+const char kGenericPerfEvent2[] = "BRANCHES";
+const char kGenericPerfEvent3[] = "INSTRUCTIONS";
+
+TEST(PerfCountersTest, Init) {
+  EXPECT_EQ(PerfCounters::Initialize(), PerfCounters::kSupported);
+}
+
+TEST(PerfCountersTest, OneCounter) {
+  if (!PerfCounters::kSupported) {
+    GTEST_SKIP() << "Performance counters not supported.\n";
+  }
+  EXPECT_TRUE(PerfCounters::Initialize());
+  EXPECT_TRUE(PerfCounters::Create({kGenericPerfEvent1}).IsValid());
+}
+
+TEST(PerfCountersTest, NegativeTest) {
+  if (!PerfCounters::kSupported) {
+    EXPECT_FALSE(PerfCounters::Initialize());
+    return;
+  }
+  EXPECT_TRUE(PerfCounters::Initialize());
+  EXPECT_FALSE(PerfCounters::Create({}).IsValid());
+  EXPECT_FALSE(PerfCounters::Create({""}).IsValid());
+  EXPECT_FALSE(PerfCounters::Create({"not a counter name"}).IsValid());
+  {
+    EXPECT_TRUE(PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent2,
+                                      kGenericPerfEvent3})
+                    .IsValid());
+  }
+  EXPECT_FALSE(
+      PerfCounters::Create({kGenericPerfEvent2, "", kGenericPerfEvent1})
+          .IsValid());
+  EXPECT_FALSE(PerfCounters::Create({kGenericPerfEvent3, "not a counter name",
+                                     kGenericPerfEvent1})
+                   .IsValid());
+  {
+    EXPECT_TRUE(PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent2,
+                                      kGenericPerfEvent3})
+                    .IsValid());
+  }
+  EXPECT_FALSE(
+      PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent2,
+                            kGenericPerfEvent3, "MISPREDICTED_BRANCH_RETIRED"})
+          .IsValid());
+}
+
+TEST(PerfCountersTest, Read1Counter) {
+  if (!PerfCounters::kSupported) {
+    GTEST_SKIP() << "Test skipped because libpfm is not supported.\n";
+  }
+  EXPECT_TRUE(PerfCounters::Initialize());
+  auto counters = PerfCounters::Create({kGenericPerfEvent1});
+  EXPECT_TRUE(counters.IsValid());
+  PerfCounterValues values1(1);
+  EXPECT_TRUE(counters.Snapshot(&values1));
+  EXPECT_GT(values1[0], 0);
+  PerfCounterValues values2(1);
+  EXPECT_TRUE(counters.Snapshot(&values2));
+  EXPECT_GT(values2[0], 0);
+  EXPECT_GT(values2[0], values1[0]);
+}
+
+TEST(PerfCountersTest, Read2Counters) {
+  if (!PerfCounters::kSupported) {
+    GTEST_SKIP() << "Test skipped because libpfm is not supported.\n";
+  }
+  EXPECT_TRUE(PerfCounters::Initialize());
+  auto counters =
+      PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent2});
+  EXPECT_TRUE(counters.IsValid());
+  PerfCounterValues values1(2);
+  EXPECT_TRUE(counters.Snapshot(&values1));
+  EXPECT_GT(values1[0], 0);
+  EXPECT_GT(values1[1], 0);
+  PerfCounterValues values2(2);
+  EXPECT_TRUE(counters.Snapshot(&values2));
+  EXPECT_GT(values2[0], 0);
+  EXPECT_GT(values2[1], 0);
+}
+
+size_t do_work() {
+  size_t res = 0;
+  for (size_t i = 0; i < 100000000; ++i) res += i * i;
+  return res;
+}
+
+void measure(size_t threadcount, PerfCounterValues* values1,
+             PerfCounterValues* values2) {
+  BM_CHECK_NE(values1, nullptr);
+  BM_CHECK_NE(values2, nullptr);
+  std::vector<std::thread> threads(threadcount);
+  auto work = [&]() { BM_CHECK(do_work() > 1000); };
+
+  // We need to first set up the counters, then start the threads, so the
+  // threads would inherit the counters. But later, we need to first destroy the
+  // thread pool (so all the work finishes), then measure the counters. So the
+  // scopes overlap, and we need to explicitly control the scope of the
+  // threadpool.
+  auto counters =
+      PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent3});
+  for (auto& t : threads) t = std::thread(work);
+  counters.Snapshot(values1);
+  for (auto& t : threads) t.join();
+  counters.Snapshot(values2);
+}
+
+TEST(PerfCountersTest, MultiThreaded) {
+  if (!PerfCounters::kSupported) {
+    GTEST_SKIP() << "Test skipped because libpfm is not supported.";
+  }
+  EXPECT_TRUE(PerfCounters::Initialize());
+  PerfCounterValues values1(2);
+  PerfCounterValues values2(2);
+
+  measure(2, &values1, &values2);
+  std::vector<double> D1{static_cast<double>(values2[0] - values1[0]),
+                         static_cast<double>(values2[1] - values1[1])};
+
+  measure(4, &values1, &values2);
+  std::vector<double> D2{static_cast<double>(values2[0] - values1[0]),
+                         static_cast<double>(values2[1] - values1[1])};
+
+  // Some extra work will happen on the main thread - like joining the threads
+  // - so the ratio won't be quite 2.0, but very close.
+  EXPECT_GE(D2[0], 1.9 * D1[0]);
+  EXPECT_GE(D2[1], 1.9 * D1[1]);
+}
+}  // namespace
diff --git a/3rdparty/benchmark/test/perf_counters_test.cc b/3rdparty/benchmark/test/perf_counters_test.cc
new file mode 100644
index 00000000..3017a452
--- /dev/null
+++ b/3rdparty/benchmark/test/perf_counters_test.cc
@@ -0,0 +1,27 @@
+#undef NDEBUG
+
+#include "../src/perf_counters.h"
+
+#include "benchmark/benchmark.h"
+#include "output_test.h"
+
+static void BM_Simple(benchmark::State& state) {
+  for (auto _ : state) {
+    benchmark::DoNotOptimize(state.iterations());
+  }
+}
+BENCHMARK(BM_Simple);
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Simple\",$"}});
+
+static void CheckSimple(Results const& e) {
+  CHECK_COUNTER_VALUE(e, double, "CYCLES", GT, 0);
+  CHECK_COUNTER_VALUE(e, double, "BRANCHES", GT, 0.0);
+}
+CHECK_BENCHMARK_RESULTS("BM_Simple", &CheckSimple);
+
+int main(int argc, char* argv[]) {
+  if (!benchmark::internal::PerfCounters::kSupported) {
+    return 0;
+  }
+  RunOutputTests(argc, argv);
+}
diff --git a/3rdparty/benchmark/test/register_benchmark_test.cc b/3rdparty/benchmark/test/register_benchmark_test.cc
new file mode 100644
index 00000000..602405b6
--- /dev/null
+++ b/3rdparty/benchmark/test/register_benchmark_test.cc
@@ -0,0 +1,184 @@
+
+#undef NDEBUG
+#include <cassert>
+#include <vector>
+
+#include "../src/check.h"  // NOTE: check.h is for internal use only!
+#include "benchmark/benchmark.h"
+
+namespace {
+
+class TestReporter : public benchmark::ConsoleReporter {
+ public:
+  virtual void ReportRuns(const std::vector<Run>& report) BENCHMARK_OVERRIDE {
+    all_runs_.insert(all_runs_.end(), begin(report), end(report));
+    ConsoleReporter::ReportRuns(report);
+  }
+
+  std::vector<Run> all_runs_;
+};
+
+struct TestCase {
+  std::string name;
+  const char* label;
+  // Note: not explicit as we rely on it being converted through ADD_CASES.
+  TestCase(const char* xname) : TestCase(xname, nullptr) {}
+  TestCase(const char* xname, const char* xlabel)
+      : name(xname), label(xlabel) {}
+
+  typedef benchmark::BenchmarkReporter::Run Run;
+
+  void CheckRun(Run const& run) const {
+    // clang-format off
+    BM_CHECK(name == run.benchmark_name()) << "expected " << name << " got "
+                                      << run.benchmark_name();
+    if (label) {
+      BM_CHECK(run.report_label == label) << "expected " << label << " got "
+                                       << run.report_label;
+    } else {
+      BM_CHECK(run.report_label.empty());
+    }
+    // clang-format on
+  }
+};
+
+std::vector<TestCase> ExpectedResults;
+
+int AddCases(std::initializer_list<TestCase> const& v) {
+  for (const auto& N : v) {
+    ExpectedResults.push_back(N);
+  }
+  return 0;
+}
+
+#define CONCAT(x, y) CONCAT2(x, y)
+#define CONCAT2(x, y) x##y
+#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = AddCases({__VA_ARGS__})
+
+}  // end namespace
+
+typedef benchmark::internal::Benchmark* ReturnVal;
+
+//----------------------------------------------------------------------------//
+// Test RegisterBenchmark with no additional arguments
+//----------------------------------------------------------------------------//
+void BM_function(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_function);
+ReturnVal dummy = benchmark::RegisterBenchmark(
+    "BM_function_manual_registration", BM_function);
+ADD_CASES({"BM_function"}, {"BM_function_manual_registration"});
+
+//----------------------------------------------------------------------------//
+// Test RegisterBenchmark with additional arguments
+// Note: GCC <= 4.8 do not support this form of RegisterBenchmark because they
+//       reject the variadic pack expansion of lambda captures.
+//----------------------------------------------------------------------------//
+#ifndef BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
+
+void BM_extra_args(benchmark::State& st, const char* label) {
+  for (auto _ : st) {
+  }
+  st.SetLabel(label);
+}
+int RegisterFromFunction() {
+  std::pair<const char*, const char*> cases[] = {
+      {"test1", "One"}, {"test2", "Two"}, {"test3", "Three"}};
+  for (auto const& c : cases)
+    benchmark::RegisterBenchmark(c.first, &BM_extra_args, c.second);
+  return 0;
+}
+int dummy2 = RegisterFromFunction();
+ADD_CASES({"test1", "One"}, {"test2", "Two"}, {"test3", "Three"});
+
+#endif  // BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
+
+//----------------------------------------------------------------------------//
+// Test RegisterBenchmark with different callable types
+//----------------------------------------------------------------------------//
+
+struct CustomFixture {
+  void operator()(benchmark::State& st) {
+    for (auto _ : st) {
+    }
+  }
+};
+
+void TestRegistrationAtRuntime() {
+#ifdef BENCHMARK_HAS_CXX11
+  {
+    CustomFixture fx;
+    benchmark::RegisterBenchmark("custom_fixture", fx);
+    AddCases({"custom_fixture"});
+  }
+#endif
+#ifndef BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
+  {
+    const char* x = "42";
+    auto capturing_lam = [=](benchmark::State& st) {
+      for (auto _ : st) {
+      }
+      st.SetLabel(x);
+    };
+    benchmark::RegisterBenchmark("lambda_benchmark", capturing_lam);
+    AddCases({{"lambda_benchmark", x}});
+  }
+#endif
+}
+
+// Test that all benchmarks, registered at either during static init or runtime,
+// are run and the results are passed to the reported.
+void RunTestOne() {
+  TestRegistrationAtRuntime();
+
+  TestReporter test_reporter;
+  benchmark::RunSpecifiedBenchmarks(&test_reporter);
+
+  typedef benchmark::BenchmarkReporter::Run Run;
+  auto EB = ExpectedResults.begin();
+
+  for (Run const& run : test_reporter.all_runs_) {
+    assert(EB != ExpectedResults.end());
+    EB->CheckRun(run);
+    ++EB;
+  }
+  assert(EB == ExpectedResults.end());
+}
+
+// Test that ClearRegisteredBenchmarks() clears all previously registered
+// benchmarks.
+// Also test that new benchmarks can be registered and ran afterwards.
+void RunTestTwo() {
+  assert(ExpectedResults.size() != 0 &&
+         "must have at least one registered benchmark");
+  ExpectedResults.clear();
+  benchmark::ClearRegisteredBenchmarks();
+
+  TestReporter test_reporter;
+  size_t num_ran = benchmark::RunSpecifiedBenchmarks(&test_reporter);
+  assert(num_ran == 0);
+  assert(test_reporter.all_runs_.begin() == test_reporter.all_runs_.end());
+
+  TestRegistrationAtRuntime();
+  num_ran = benchmark::RunSpecifiedBenchmarks(&test_reporter);
+  assert(num_ran == ExpectedResults.size());
+
+  typedef benchmark::BenchmarkReporter::Run Run;
+  auto EB = ExpectedResults.begin();
+
+  for (Run const& run : test_reporter.all_runs_) {
+    assert(EB != ExpectedResults.end());
+    EB->CheckRun(run);
+    ++EB;
+  }
+  assert(EB == ExpectedResults.end());
+}
+
+int main(int argc, char* argv[]) {
+  benchmark::Initialize(&argc, argv);
+
+  RunTestOne();
+  RunTestTwo();
+}
diff --git a/3rdparty/benchmark/test/repetitions_test.cc b/3rdparty/benchmark/test/repetitions_test.cc
new file mode 100644
index 00000000..569777d5
--- /dev/null
+++ b/3rdparty/benchmark/test/repetitions_test.cc
@@ -0,0 +1,214 @@
+
+#include "benchmark/benchmark.h"
+#include "output_test.h"
+
+// ========================================================================= //
+// ------------------------ Testing Basic Output --------------------------- //
+// ========================================================================= //
+
+static void BM_ExplicitRepetitions(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_ExplicitRepetitions)->Repetitions(2);
+
+ADD_CASES(TC_ConsoleOut,
+          {{"^BM_ExplicitRepetitions/repeats:2 %console_report$"}});
+ADD_CASES(TC_ConsoleOut,
+          {{"^BM_ExplicitRepetitions/repeats:2 %console_report$"}});
+ADD_CASES(TC_ConsoleOut,
+          {{"^BM_ExplicitRepetitions/repeats:2_mean %console_report$"}});
+ADD_CASES(TC_ConsoleOut,
+          {{"^BM_ExplicitRepetitions/repeats:2_median %console_report$"}});
+ADD_CASES(TC_ConsoleOut,
+          {{"^BM_ExplicitRepetitions/repeats:2_stddev %console_report$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\"$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"repetition_index\": 1,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\"$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2_mean\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"mean\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\"$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2_median\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"median\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\"$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2_stddev\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"stddev\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\"$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_ExplicitRepetitions/repeats:2\",%csv_report$"}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_ExplicitRepetitions/repeats:2\",%csv_report$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_ExplicitRepetitions/repeats:2_mean\",%csv_report$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_ExplicitRepetitions/repeats:2_median\",%csv_report$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_ExplicitRepetitions/repeats:2_stddev\",%csv_report$"}});
+
+// ========================================================================= //
+// ------------------------ Testing Basic Output --------------------------- //
+// ========================================================================= //
+
+static void BM_ImplicitRepetitions(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_ImplicitRepetitions);
+
+ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions %console_report$"}});
+ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions %console_report$"}});
+ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions %console_report$"}});
+ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions_mean %console_report$"}});
+ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions_median %console_report$"}});
+ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions_stddev %console_report$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions\",$"},
+                       {"\"family_index\": 1,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 3,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\"$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions\",$"},
+                       {"\"family_index\": 1,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 3,$", MR_Next},
+                       {"\"repetition_index\": 1,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\"$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions\",$"},
+                       {"\"family_index\": 1,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 3,$", MR_Next},
+                       {"\"repetition_index\": 2,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\"$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions_mean\",$"},
+                       {"\"family_index\": 1,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
+                       {"\"run_type\": \"aggregate\",$", MR_Next},
+                       {"\"repetitions\": 3,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"aggregate_name\": \"mean\",$", MR_Next},
+                       {"\"aggregate_unit\": \"time\",$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\"$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions_median\",$"},
+                       {"\"family_index\": 1,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
+                       {"\"run_type\": \"aggregate\",$", MR_Next},
+                       {"\"repetitions\": 3,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"aggregate_name\": \"median\",$", MR_Next},
+                       {"\"aggregate_unit\": \"time\",$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\"$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions_stddev\",$"},
+                       {"\"family_index\": 1,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
+                       {"\"run_type\": \"aggregate\",$", MR_Next},
+                       {"\"repetitions\": 3,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
+                       {"\"aggregate_unit\": \"time\",$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\"$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions\",%csv_report$"}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions\",%csv_report$"}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions_mean\",%csv_report$"}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions_median\",%csv_report$"}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions_stddev\",%csv_report$"}});
+
+// ========================================================================= //
+// --------------------------- TEST CASES END ------------------------------ //
+// ========================================================================= //
+
+int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/test/report_aggregates_only_test.cc b/3rdparty/benchmark/test/report_aggregates_only_test.cc
new file mode 100644
index 00000000..47da5035
--- /dev/null
+++ b/3rdparty/benchmark/test/report_aggregates_only_test.cc
@@ -0,0 +1,41 @@
+
+#undef NDEBUG
+#include <cstdio>
+#include <string>
+
+#include "benchmark/benchmark.h"
+#include "output_test.h"
+
+// Ok this test is super ugly. We want to check what happens with the file
+// reporter in the presence of ReportAggregatesOnly().
+// We do not care about console output, the normal tests check that already.
+
+void BM_SummaryRepeat(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->ReportAggregatesOnly();
+
+int main(int argc, char* argv[]) {
+  const std::string output = GetFileReporterOutput(argc, argv);
+
+  if (SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3") != 4 ||
+      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_mean\"") != 1 ||
+      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_median\"") !=
+          1 ||
+      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\"") !=
+          1 ||
+      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_cv\"") != 1) {
+    std::cout << "Precondition mismatch. Expected to only find four "
+                 "occurrences of \"BM_SummaryRepeat/repeats:3\" substring:\n"
+                 "\"name\": \"BM_SummaryRepeat/repeats:3_mean\", "
+                 "\"name\": \"BM_SummaryRepeat/repeats:3_median\", "
+                 "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\", "
+                 "\"name\": \"BM_SummaryRepeat/repeats:3_cv\"\nThe entire "
+                 "output:\n";
+    std::cout << output;
+    return 1;
+  }
+
+  return 0;
+}
diff --git a/3rdparty/benchmark/test/reporter_output_test.cc b/3rdparty/benchmark/test/reporter_output_test.cc
new file mode 100644
index 00000000..2b6e6543
--- /dev/null
+++ b/3rdparty/benchmark/test/reporter_output_test.cc
@@ -0,0 +1,1127 @@
+
+#undef NDEBUG
+#include <numeric>
+#include <utility>
+
+#include "benchmark/benchmark.h"
+#include "output_test.h"
+
+// ========================================================================= //
+// ---------------------- Testing Prologue Output -------------------------- //
+// ========================================================================= //
+
+ADD_CASES(TC_ConsoleOut, {{"^[-]+$", MR_Next},
+                          {"^Benchmark %s Time %s CPU %s Iterations$", MR_Next},
+                          {"^[-]+$", MR_Next}});
+static int AddContextCases() {
+  AddCases(TC_ConsoleErr,
+           {
+               {"^%int-%int-%intT%int:%int:%int[-+]%int:%int$", MR_Default},
+               {"Running .*/reporter_output_test(\\.exe)?$", MR_Next},
+               {"Run on \\(%int X %float MHz CPU s?\\)", MR_Next},
+           });
+  AddCases(TC_JSONOut,
+           {{"^\\{", MR_Default},
+            {"\"context\":", MR_Next},
+            {"\"date\": \"", MR_Next},
+            {"\"host_name\":", MR_Next},
+            {"\"executable\": \".*(/|\\\\)reporter_output_test(\\.exe)?\",",
+             MR_Next},
+            {"\"num_cpus\": %int,$", MR_Next},
+            {"\"mhz_per_cpu\": %float,$", MR_Next},
+            {"\"caches\": \\[$", MR_Default}});
+  auto const& Info = benchmark::CPUInfo::Get();
+  auto const& Caches = Info.caches;
+  if (!Caches.empty()) {
+    AddCases(TC_ConsoleErr, {{"CPU Caches:$", MR_Next}});
+  }
+  for (size_t I = 0; I < Caches.size(); ++I) {
+    std::string num_caches_str =
+        Caches[I].num_sharing != 0 ? " \\(x%int\\)$" : "$";
+    AddCases(TC_ConsoleErr,
+             {{"L%int (Data|Instruction|Unified) %int KiB" + num_caches_str,
+               MR_Next}});
+    AddCases(TC_JSONOut, {{"\\{$", MR_Next},
+                          {"\"type\": \"", MR_Next},
+                          {"\"level\": %int,$", MR_Next},
+                          {"\"size\": %int,$", MR_Next},
+                          {"\"num_sharing\": %int$", MR_Next},
+                          {"}[,]{0,1}$", MR_Next}});
+  }
+  AddCases(TC_JSONOut, {{"],$"}});
+  auto const& LoadAvg = Info.load_avg;
+  if (!LoadAvg.empty()) {
+    AddCases(TC_ConsoleErr,
+             {{"Load Average: (%float, ){0,2}%float$", MR_Next}});
+  }
+  AddCases(TC_JSONOut, {{"\"load_avg\": \\[(%float,?){0,3}],$", MR_Next}});
+  return 0;
+}
+int dummy_register = AddContextCases();
+ADD_CASES(TC_CSVOut, {{"%csv_header"}});
+
+// ========================================================================= //
+// ------------------------ Testing Basic Output --------------------------- //
+// ========================================================================= //
+
+void BM_basic(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_basic);
+
+ADD_CASES(TC_ConsoleOut, {{"^BM_basic %console_report$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_basic\",$"},
+                       {"\"family_index\": 0,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_basic\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\"$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_basic\",%csv_report$"}});
+
+// ========================================================================= //
+// ------------------------ Testing Bytes per Second Output ---------------- //
+// ========================================================================= //
+
+void BM_bytes_per_second(benchmark::State& state) {
+  for (auto _ : state) {
+    // This test requires a non-zero CPU time to avoid divide-by-zero
+    benchmark::DoNotOptimize(state.iterations());
+  }
+  state.SetBytesProcessed(1);
+}
+BENCHMARK(BM_bytes_per_second);
+
+ADD_CASES(TC_ConsoleOut, {{"^BM_bytes_per_second %console_report "
+                           "bytes_per_second=%float[kM]{0,1}/s$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_bytes_per_second\",$"},
+                       {"\"family_index\": 1,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_bytes_per_second\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\",$", MR_Next},
+                       {"\"bytes_per_second\": %float$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_bytes_per_second\",%csv_bytes_report$"}});
+
+// ========================================================================= //
+// ------------------------ Testing Items per Second Output ---------------- //
+// ========================================================================= //
+
+void BM_items_per_second(benchmark::State& state) {
+  for (auto _ : state) {
+    // This test requires a non-zero CPU time to avoid divide-by-zero
+    benchmark::DoNotOptimize(state.iterations());
+  }
+  state.SetItemsProcessed(1);
+}
+BENCHMARK(BM_items_per_second);
+
+ADD_CASES(TC_ConsoleOut, {{"^BM_items_per_second %console_report "
+                           "items_per_second=%float[kM]{0,1}/s$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_items_per_second\",$"},
+                       {"\"family_index\": 2,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_items_per_second\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\",$", MR_Next},
+                       {"\"items_per_second\": %float$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_items_per_second\",%csv_items_report$"}});
+
+// ========================================================================= //
+// ------------------------ Testing Label Output --------------------------- //
+// ========================================================================= //
+
+void BM_label(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+  state.SetLabel("some label");
+}
+BENCHMARK(BM_label);
+
+ADD_CASES(TC_ConsoleOut, {{"^BM_label %console_report some label$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_label\",$"},
+                       {"\"family_index\": 3,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_label\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\",$", MR_Next},
+                       {"\"label\": \"some label\"$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_label\",%csv_label_report_begin\"some "
+                       "label\"%csv_label_report_end$"}});
+
+// ========================================================================= //
+// ------------------------ Testing Time Label Output ---------------------- //
+// ========================================================================= //
+
+void BM_time_label_nanosecond(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_time_label_nanosecond)->Unit(benchmark::kNanosecond);
+
+ADD_CASES(TC_ConsoleOut, {{"^BM_time_label_nanosecond %console_report$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_time_label_nanosecond\",$"},
+           {"\"family_index\": 4,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_time_label_nanosecond\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\"$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_time_label_nanosecond\",%csv_report$"}});
+
+void BM_time_label_microsecond(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_time_label_microsecond)->Unit(benchmark::kMicrosecond);
+
+ADD_CASES(TC_ConsoleOut, {{"^BM_time_label_microsecond %console_us_report$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_time_label_microsecond\",$"},
+           {"\"family_index\": 5,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_time_label_microsecond\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"us\"$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_time_label_microsecond\",%csv_us_report$"}});
+
+void BM_time_label_millisecond(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_time_label_millisecond)->Unit(benchmark::kMillisecond);
+
+ADD_CASES(TC_ConsoleOut, {{"^BM_time_label_millisecond %console_ms_report$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_time_label_millisecond\",$"},
+           {"\"family_index\": 6,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_time_label_millisecond\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ms\"$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_time_label_millisecond\",%csv_ms_report$"}});
+
+void BM_time_label_second(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_time_label_second)->Unit(benchmark::kSecond);
+
+ADD_CASES(TC_ConsoleOut, {{"^BM_time_label_second %console_s_report$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_time_label_second\",$"},
+                       {"\"family_index\": 7,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_time_label_second\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"s\"$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_time_label_second\",%csv_s_report$"}});
+
+// ========================================================================= //
+// ------------------------ Testing Error Output --------------------------- //
+// ========================================================================= //
+
+void BM_error(benchmark::State& state) {
+  state.SkipWithError("message");
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_error);
+ADD_CASES(TC_ConsoleOut, {{"^BM_error[ ]+ERROR OCCURRED: 'message'$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_error\",$"},
+                       {"\"family_index\": 8,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_error\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"error_occurred\": true,$", MR_Next},
+                       {"\"error_message\": \"message\",$", MR_Next}});
+
+ADD_CASES(TC_CSVOut, {{"^\"BM_error\",,,,,,,,true,\"message\"$"}});
+
+// ========================================================================= //
+// ------------------------ Testing No Arg Name Output -----------------------
+// //
+// ========================================================================= //
+
+void BM_no_arg_name(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_no_arg_name)->Arg(3);
+ADD_CASES(TC_ConsoleOut, {{"^BM_no_arg_name/3 %console_report$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_no_arg_name/3\",$"},
+                       {"\"family_index\": 9,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_no_arg_name/3\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_no_arg_name/3\",%csv_report$"}});
+
+// ========================================================================= //
+// ------------------------ Testing Arg Name Output ----------------------- //
+// ========================================================================= //
+
+void BM_arg_name(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_arg_name)->ArgName("first")->Arg(3);
+ADD_CASES(TC_ConsoleOut, {{"^BM_arg_name/first:3 %console_report$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_arg_name/first:3\",$"},
+                       {"\"family_index\": 10,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_arg_name/first:3\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_arg_name/first:3\",%csv_report$"}});
+
+// ========================================================================= //
+// ------------------------ Testing Arg Names Output ----------------------- //
+// ========================================================================= //
+
+void BM_arg_names(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_arg_names)->Args({2, 5, 4})->ArgNames({"first", "", "third"});
+ADD_CASES(TC_ConsoleOut,
+          {{"^BM_arg_names/first:2/5/third:4 %console_report$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_arg_names/first:2/5/third:4\",$"},
+           {"\"family_index\": 11,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_arg_names/first:2/5/third:4\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_arg_names/first:2/5/third:4\",%csv_report$"}});
+
+// ========================================================================= //
+// ------------------------ Testing Name Output ---------------------------- //
+// ========================================================================= //
+
+void BM_name(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_name)->Name("BM_custom_name");
+
+ADD_CASES(TC_ConsoleOut, {{"^BM_custom_name %console_report$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_custom_name\",$"},
+                       {"\"family_index\": 12,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_custom_name\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\"$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_custom_name\",%csv_report$"}});
+
+// ========================================================================= //
+// ------------------------ Testing Big Args Output ------------------------ //
+// ========================================================================= //
+
+void BM_BigArgs(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_BigArgs)->RangeMultiplier(2)->Range(1U << 30U, 1U << 31U);
+ADD_CASES(TC_ConsoleOut, {{"^BM_BigArgs/1073741824 %console_report$"},
+                          {"^BM_BigArgs/2147483648 %console_report$"}});
+
+// ========================================================================= //
+// ----------------------- Testing Complexity Output ----------------------- //
+// ========================================================================= //
+
+void BM_Complexity_O1(benchmark::State& state) {
+  for (auto _ : state) {
+    // This test requires a non-zero CPU time to avoid divide-by-zero
+    benchmark::DoNotOptimize(state.iterations());
+  }
+  state.SetComplexityN(state.range(0));
+}
+BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity(benchmark::o1);
+SET_SUBSTITUTIONS({{"%bigOStr", "[ ]* %float \\([0-9]+\\)"},
+                   {"%RMS", "[ ]*[0-9]+ %"}});
+ADD_CASES(TC_ConsoleOut, {{"^BM_Complexity_O1_BigO %bigOStr %bigOStr[ ]*$"},
+                          {"^BM_Complexity_O1_RMS %RMS %RMS[ ]*$"}});
+
+// ========================================================================= //
+// ----------------------- Testing Aggregate Output ------------------------ //
+// ========================================================================= //
+
+// Test that non-aggregate data is printed by default
+void BM_Repeat(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+// need two repetitions min to be able to output any aggregate output
+BENCHMARK(BM_Repeat)->Repetitions(2);
+ADD_CASES(TC_ConsoleOut,
+          {{"^BM_Repeat/repeats:2 %console_report$"},
+           {"^BM_Repeat/repeats:2 %console_report$"},
+           {"^BM_Repeat/repeats:2_mean %console_time_only_report [ ]*2$"},
+           {"^BM_Repeat/repeats:2_median %console_time_only_report [ ]*2$"},
+           {"^BM_Repeat/repeats:2_stddev %console_time_only_report [ ]*2$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:2\",$"},
+                       {"\"family_index\": 15,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:2\"", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 2,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:2\",$"},
+                       {"\"family_index\": 15,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 2,$", MR_Next},
+                       {"\"repetition_index\": 1,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:2_mean\",$"},
+                       {"\"family_index\": 15,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
+                       {"\"run_type\": \"aggregate\",$", MR_Next},
+                       {"\"repetitions\": 2,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"aggregate_name\": \"mean\",$", MR_Next},
+                       {"\"aggregate_unit\": \"time\",$", MR_Next},
+                       {"\"iterations\": 2,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:2_median\",$"},
+                       {"\"family_index\": 15,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
+                       {"\"run_type\": \"aggregate\",$", MR_Next},
+                       {"\"repetitions\": 2,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"aggregate_name\": \"median\",$", MR_Next},
+                       {"\"aggregate_unit\": \"time\",$", MR_Next},
+                       {"\"iterations\": 2,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:2_stddev\",$"},
+                       {"\"family_index\": 15,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
+                       {"\"run_type\": \"aggregate\",$", MR_Next},
+                       {"\"repetitions\": 2,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
+                       {"\"aggregate_unit\": \"time\",$", MR_Next},
+                       {"\"iterations\": 2,$", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:2\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:2\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:2_mean\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:2_median\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:2_stddev\",%csv_report$"}});
+// but for two repetitions, mean and median is the same, so let's repeat..
+BENCHMARK(BM_Repeat)->Repetitions(3);
+ADD_CASES(TC_ConsoleOut,
+          {{"^BM_Repeat/repeats:3 %console_report$"},
+           {"^BM_Repeat/repeats:3 %console_report$"},
+           {"^BM_Repeat/repeats:3 %console_report$"},
+           {"^BM_Repeat/repeats:3_mean %console_time_only_report [ ]*3$"},
+           {"^BM_Repeat/repeats:3_median %console_time_only_report [ ]*3$"},
+           {"^BM_Repeat/repeats:3_stddev %console_time_only_report [ ]*3$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:3\",$"},
+                       {"\"family_index\": 16,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 3,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:3\",$"},
+                       {"\"family_index\": 16,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 3,$", MR_Next},
+                       {"\"repetition_index\": 1,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:3\",$"},
+                       {"\"family_index\": 16,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 3,$", MR_Next},
+                       {"\"repetition_index\": 2,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:3_mean\",$"},
+                       {"\"family_index\": 16,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
+                       {"\"run_type\": \"aggregate\",$", MR_Next},
+                       {"\"repetitions\": 3,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"aggregate_name\": \"mean\",$", MR_Next},
+                       {"\"aggregate_unit\": \"time\",$", MR_Next},
+                       {"\"iterations\": 3,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:3_median\",$"},
+                       {"\"family_index\": 16,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
+                       {"\"run_type\": \"aggregate\",$", MR_Next},
+                       {"\"repetitions\": 3,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"aggregate_name\": \"median\",$", MR_Next},
+                       {"\"aggregate_unit\": \"time\",$", MR_Next},
+                       {"\"iterations\": 3,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:3_stddev\",$"},
+                       {"\"family_index\": 16,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
+                       {"\"run_type\": \"aggregate\",$", MR_Next},
+                       {"\"repetitions\": 3,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
+                       {"\"aggregate_unit\": \"time\",$", MR_Next},
+                       {"\"iterations\": 3,$", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:3\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:3\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:3\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:3_mean\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:3_median\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:3_stddev\",%csv_report$"}});
+// median differs between even/odd number of repetitions, so just to be sure
+BENCHMARK(BM_Repeat)->Repetitions(4);
+ADD_CASES(TC_ConsoleOut,
+          {{"^BM_Repeat/repeats:4 %console_report$"},
+           {"^BM_Repeat/repeats:4 %console_report$"},
+           {"^BM_Repeat/repeats:4 %console_report$"},
+           {"^BM_Repeat/repeats:4 %console_report$"},
+           {"^BM_Repeat/repeats:4_mean %console_time_only_report [ ]*4$"},
+           {"^BM_Repeat/repeats:4_median %console_time_only_report [ ]*4$"},
+           {"^BM_Repeat/repeats:4_stddev %console_time_only_report [ ]*4$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:4\",$"},
+                       {"\"family_index\": 17,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 4,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
+                       {"\"family_index\": 17,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 4,$", MR_Next},
+                       {"\"repetition_index\": 1,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
+                       {"\"family_index\": 17,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 4,$", MR_Next},
+                       {"\"repetition_index\": 2,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
+                       {"\"family_index\": 17,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 4,$", MR_Next},
+                       {"\"repetition_index\": 3,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:4_mean\",$"},
+                       {"\"family_index\": 17,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
+                       {"\"run_type\": \"aggregate\",$", MR_Next},
+                       {"\"repetitions\": 4,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"aggregate_name\": \"mean\",$", MR_Next},
+                       {"\"aggregate_unit\": \"time\",$", MR_Next},
+                       {"\"iterations\": 4,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:4_median\",$"},
+                       {"\"family_index\": 17,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
+                       {"\"run_type\": \"aggregate\",$", MR_Next},
+                       {"\"repetitions\": 4,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"aggregate_name\": \"median\",$", MR_Next},
+                       {"\"aggregate_unit\": \"time\",$", MR_Next},
+                       {"\"iterations\": 4,$", MR_Next},
+                       {"\"name\": \"BM_Repeat/repeats:4_stddev\",$"},
+                       {"\"family_index\": 17,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
+                       {"\"run_type\": \"aggregate\",$", MR_Next},
+                       {"\"repetitions\": 4,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
+                       {"\"aggregate_unit\": \"time\",$", MR_Next},
+                       {"\"iterations\": 4,$", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:4\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:4_mean\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:4_median\",%csv_report$"},
+                      {"^\"BM_Repeat/repeats:4_stddev\",%csv_report$"}});
+
+// Test that a non-repeated test still prints non-aggregate results even when
+// only-aggregate reports have been requested
+void BM_RepeatOnce(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_RepeatOnce)->Repetitions(1)->ReportAggregatesOnly();
+ADD_CASES(TC_ConsoleOut, {{"^BM_RepeatOnce/repeats:1 %console_report$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_RepeatOnce/repeats:1\",$"},
+                       {"\"family_index\": 18,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_RepeatOnce/repeats:1\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_RepeatOnce/repeats:1\",%csv_report$"}});
+
+// Test that non-aggregate data is not reported
+void BM_SummaryRepeat(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->ReportAggregatesOnly();
+ADD_CASES(
+    TC_ConsoleOut,
+    {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
+     {"^BM_SummaryRepeat/repeats:3_mean %console_time_only_report [ ]*3$"},
+     {"^BM_SummaryRepeat/repeats:3_median %console_time_only_report [ ]*3$"},
+     {"^BM_SummaryRepeat/repeats:3_stddev %console_time_only_report [ ]*3$"}});
+ADD_CASES(TC_JSONOut,
+          {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
+           {"\"name\": \"BM_SummaryRepeat/repeats:3_mean\",$"},
+           {"\"family_index\": 19,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 3,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"mean\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": 3,$", MR_Next},
+           {"\"name\": \"BM_SummaryRepeat/repeats:3_median\",$"},
+           {"\"family_index\": 19,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 3,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"median\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": 3,$", MR_Next},
+           {"\"name\": \"BM_SummaryRepeat/repeats:3_stddev\",$"},
+           {"\"family_index\": 19,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 3,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"stddev\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": 3,$", MR_Next}});
+ADD_CASES(TC_CSVOut, {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
+                      {"^\"BM_SummaryRepeat/repeats:3_mean\",%csv_report$"},
+                      {"^\"BM_SummaryRepeat/repeats:3_median\",%csv_report$"},
+                      {"^\"BM_SummaryRepeat/repeats:3_stddev\",%csv_report$"}});
+
+// Test that non-aggregate data is not displayed.
+// NOTE: this test is kinda bad. we are only testing the display output.
+//       But we don't check that the file output still contains everything...
+void BM_SummaryDisplay(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_SummaryDisplay)->Repetitions(2)->DisplayAggregatesOnly();
+ADD_CASES(
+    TC_ConsoleOut,
+    {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
+     {"^BM_SummaryDisplay/repeats:2_mean %console_time_only_report [ ]*2$"},
+     {"^BM_SummaryDisplay/repeats:2_median %console_time_only_report [ ]*2$"},
+     {"^BM_SummaryDisplay/repeats:2_stddev %console_time_only_report [ ]*2$"}});
+ADD_CASES(TC_JSONOut,
+          {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
+           {"\"name\": \"BM_SummaryDisplay/repeats:2_mean\",$"},
+           {"\"family_index\": 20,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"mean\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": 2,$", MR_Next},
+           {"\"name\": \"BM_SummaryDisplay/repeats:2_median\",$"},
+           {"\"family_index\": 20,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"median\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": 2,$", MR_Next},
+           {"\"name\": \"BM_SummaryDisplay/repeats:2_stddev\",$"},
+           {"\"family_index\": 20,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"stddev\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": 2,$", MR_Next}});
+ADD_CASES(TC_CSVOut,
+          {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
+           {"^\"BM_SummaryDisplay/repeats:2_mean\",%csv_report$"},
+           {"^\"BM_SummaryDisplay/repeats:2_median\",%csv_report$"},
+           {"^\"BM_SummaryDisplay/repeats:2_stddev\",%csv_report$"}});
+
+// Test repeats with custom time unit.
+void BM_RepeatTimeUnit(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_RepeatTimeUnit)
+    ->Repetitions(3)
+    ->ReportAggregatesOnly()
+    ->Unit(benchmark::kMicrosecond);
+ADD_CASES(
+    TC_ConsoleOut,
+    {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
+     {"^BM_RepeatTimeUnit/repeats:3_mean %console_us_time_only_report [ ]*3$"},
+     {"^BM_RepeatTimeUnit/repeats:3_median %console_us_time_only_report [ "
+      "]*3$"},
+     {"^BM_RepeatTimeUnit/repeats:3_stddev %console_us_time_only_report [ "
+      "]*3$"}});
+ADD_CASES(TC_JSONOut,
+          {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
+           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_mean\",$"},
+           {"\"family_index\": 21,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 3,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"mean\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": 3,$", MR_Next},
+           {"\"time_unit\": \"us\",?$"},
+           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_median\",$"},
+           {"\"family_index\": 21,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 3,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"median\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": 3,$", MR_Next},
+           {"\"time_unit\": \"us\",?$"},
+           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_stddev\",$"},
+           {"\"family_index\": 21,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 3,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"stddev\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": 3,$", MR_Next},
+           {"\"time_unit\": \"us\",?$"}});
+ADD_CASES(TC_CSVOut,
+          {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
+           {"^\"BM_RepeatTimeUnit/repeats:3_mean\",%csv_us_report$"},
+           {"^\"BM_RepeatTimeUnit/repeats:3_median\",%csv_us_report$"},
+           {"^\"BM_RepeatTimeUnit/repeats:3_stddev\",%csv_us_report$"}});
+
+// ========================================================================= //
+// -------------------- Testing user-provided statistics ------------------- //
+// ========================================================================= //
+
+const auto UserStatistics = [](const std::vector<double>& v) {
+  return v.back();
+};
+void BM_UserStats(benchmark::State& state) {
+  for (auto _ : state) {
+    state.SetIterationTime(150 / 10e8);
+  }
+}
+// clang-format off
+BENCHMARK(BM_UserStats)
+  ->Repetitions(3)
+  ->Iterations(5)
+  ->UseManualTime()
+  ->ComputeStatistics("", UserStatistics);
+// clang-format on
+
+// check that user-provided stats is calculated, and is after the default-ones
+// empty string as name is intentional, it would sort before anything else
+ADD_CASES(TC_ConsoleOut, {{"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
+                           "]* 150 ns %time [ ]*5$"},
+                          {"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
+                           "]* 150 ns %time [ ]*5$"},
+                          {"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
+                           "]* 150 ns %time [ ]*5$"},
+                          {"^BM_UserStats/iterations:5/repeats:3/"
+                           "manual_time_mean [ ]* 150 ns %time [ ]*3$"},
+                          {"^BM_UserStats/iterations:5/repeats:3/"
+                           "manual_time_median [ ]* 150 ns %time [ ]*3$"},
+                          {"^BM_UserStats/iterations:5/repeats:3/"
+                           "manual_time_stddev [ ]* 0.000 ns %time [ ]*3$"},
+                          {"^BM_UserStats/iterations:5/repeats:3/manual_time_ "
+                           "[ ]* 150 ns %time [ ]*3$"}});
+ADD_CASES(
+    TC_JSONOut,
+    {{"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
+     {"\"family_index\": 22,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"iteration\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"repetition_index\": 0,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"iterations\": 5,$", MR_Next},
+     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
+     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
+     {"\"family_index\": 22,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"iteration\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"repetition_index\": 1,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"iterations\": 5,$", MR_Next},
+     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
+     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
+     {"\"family_index\": 22,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"iteration\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"repetition_index\": 2,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"iterations\": 5,$", MR_Next},
+     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
+     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_mean\",$"},
+     {"\"family_index\": 22,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"aggregate\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"aggregate_name\": \"mean\",$", MR_Next},
+     {"\"aggregate_unit\": \"time\",$", MR_Next},
+     {"\"iterations\": 3,$", MR_Next},
+     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
+     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_median\",$"},
+     {"\"family_index\": 22,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"aggregate\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"aggregate_name\": \"median\",$", MR_Next},
+     {"\"aggregate_unit\": \"time\",$", MR_Next},
+     {"\"iterations\": 3,$", MR_Next},
+     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
+     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_stddev\",$"},
+     {"\"family_index\": 22,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"aggregate\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"aggregate_name\": \"stddev\",$", MR_Next},
+     {"\"aggregate_unit\": \"time\",$", MR_Next},
+     {"\"iterations\": 3,$", MR_Next},
+     {"\"real_time\": %float,$", MR_Next},
+     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_\",$"},
+     {"\"family_index\": 22,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"aggregate\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"aggregate_name\": \"\",$", MR_Next},
+     {"\"aggregate_unit\": \"time\",$", MR_Next},
+     {"\"iterations\": 3,$", MR_Next},
+     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next}});
+ADD_CASES(
+    TC_CSVOut,
+    {{"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
+     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
+     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
+     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time_mean\",%csv_report$"},
+     {"^\"BM_UserStats/iterations:5/repeats:3/"
+      "manual_time_median\",%csv_report$"},
+     {"^\"BM_UserStats/iterations:5/repeats:3/"
+      "manual_time_stddev\",%csv_report$"},
+     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time_\",%csv_report$"}});
+
+// ========================================================================= //
+// ------------- Testing relative standard deviation statistics ------------ //
+// ========================================================================= //
+
+const auto UserPercentStatistics = [](const std::vector<double>&) {
+  return 1. / 100.;
+};
+void BM_UserPercentStats(benchmark::State& state) {
+  for (auto _ : state) {
+    state.SetIterationTime(150 / 10e8);
+  }
+}
+// clang-format off
+BENCHMARK(BM_UserPercentStats)
+  ->Repetitions(3)
+  ->Iterations(5)
+  ->UseManualTime()
+  ->Unit(benchmark::TimeUnit::kNanosecond)
+  ->ComputeStatistics("", UserPercentStatistics, benchmark::StatisticUnit::kPercentage);
+// clang-format on
+
+// check that UserPercent-provided stats is calculated, and is after the
+// default-ones empty string as name is intentional, it would sort before
+// anything else
+ADD_CASES(TC_ConsoleOut,
+          {{"^BM_UserPercentStats/iterations:5/repeats:3/manual_time [ "
+            "]* 150 ns %time [ ]*5$"},
+           {"^BM_UserPercentStats/iterations:5/repeats:3/manual_time [ "
+            "]* 150 ns %time [ ]*5$"},
+           {"^BM_UserPercentStats/iterations:5/repeats:3/manual_time [ "
+            "]* 150 ns %time [ ]*5$"},
+           {"^BM_UserPercentStats/iterations:5/repeats:3/"
+            "manual_time_mean [ ]* 150 ns %time [ ]*3$"},
+           {"^BM_UserPercentStats/iterations:5/repeats:3/"
+            "manual_time_median [ ]* 150 ns %time [ ]*3$"},
+           {"^BM_UserPercentStats/iterations:5/repeats:3/"
+            "manual_time_stddev [ ]* 0.000 ns %time [ ]*3$"},
+           {"^BM_UserPercentStats/iterations:5/repeats:3/manual_time_ "
+            "[ ]* 1.00 % [ ]* 1.00 %[ ]*3$"}});
+ADD_CASES(
+    TC_JSONOut,
+    {{"\"name\": \"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$"},
+     {"\"family_index\": 23,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": "
+      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"iteration\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"repetition_index\": 0,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"iterations\": 5,$", MR_Next},
+     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
+     {"\"name\": \"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$"},
+     {"\"family_index\": 23,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": "
+      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"iteration\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"repetition_index\": 1,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"iterations\": 5,$", MR_Next},
+     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
+     {"\"name\": \"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$"},
+     {"\"family_index\": 23,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": "
+      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"iteration\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"repetition_index\": 2,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"iterations\": 5,$", MR_Next},
+     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
+     {"\"name\": "
+      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time_mean\",$"},
+     {"\"family_index\": 23,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": "
+      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"aggregate\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"aggregate_name\": \"mean\",$", MR_Next},
+     {"\"aggregate_unit\": \"time\",$", MR_Next},
+     {"\"iterations\": 3,$", MR_Next},
+     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
+     {"\"name\": "
+      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time_median\",$"},
+     {"\"family_index\": 23,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": "
+      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"aggregate\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"aggregate_name\": \"median\",$", MR_Next},
+     {"\"aggregate_unit\": \"time\",$", MR_Next},
+     {"\"iterations\": 3,$", MR_Next},
+     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
+     {"\"name\": "
+      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time_stddev\",$"},
+     {"\"family_index\": 23,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": "
+      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"aggregate\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"aggregate_name\": \"stddev\",$", MR_Next},
+     {"\"aggregate_unit\": \"time\",$", MR_Next},
+     {"\"iterations\": 3,$", MR_Next},
+     {"\"real_time\": %float,$", MR_Next},
+     {"\"name\": "
+      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time_\",$"},
+     {"\"family_index\": 23,$", MR_Next},
+     {"\"per_family_instance_index\": 0,$", MR_Next},
+     {"\"run_name\": "
+      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
+      MR_Next},
+     {"\"run_type\": \"aggregate\",$", MR_Next},
+     {"\"repetitions\": 3,$", MR_Next},
+     {"\"threads\": 1,$", MR_Next},
+     {"\"aggregate_name\": \"\",$", MR_Next},
+     {"\"aggregate_unit\": \"percentage\",$", MR_Next},
+     {"\"iterations\": 3,$", MR_Next},
+     {"\"real_time\": 1\\.(0)*e-(0)*2,$", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_UserPercentStats/iterations:5/repeats:3/"
+                       "manual_time\",%csv_report$"},
+                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
+                       "manual_time\",%csv_report$"},
+                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
+                       "manual_time\",%csv_report$"},
+                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
+                       "manual_time_mean\",%csv_report$"},
+                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
+                       "manual_time_median\",%csv_report$"},
+                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
+                       "manual_time_stddev\",%csv_report$"},
+                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
+                       "manual_time_\",%csv_report$"}});
+
+// ========================================================================= //
+// ------------------------- Testing StrEscape JSON ------------------------ //
+// ========================================================================= //
+#if 0  // enable when csv testing code correctly handles multi-line fields
+void BM_JSON_Format(benchmark::State& state) {
+  state.SkipWithError("val\b\f\n\r\t\\\"with\"es,capes");
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_JSON_Format);
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_JSON_Format\",$"},
+                                              {"\"family_index\": 23,$", MR_Next},
+{"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_JSON_Format\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"error_occurred\": true,$", MR_Next},
+                       {R"("error_message": "val\\b\\f\\n\\r\\t\\\\\\"with\\"es,capes",$)", MR_Next}});
+#endif
+// ========================================================================= //
+// -------------------------- Testing CsvEscape ---------------------------- //
+// ========================================================================= //
+
+void BM_CSV_Format(benchmark::State& state) {
+  state.SkipWithError("\"freedom\"");
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_CSV_Format);
+ADD_CASES(TC_CSVOut, {{"^\"BM_CSV_Format\",,,,,,,,true,\"\"\"freedom\"\"\"$"}});
+
+// ========================================================================= //
+// --------------------------- TEST CASES END ------------------------------ //
+// ========================================================================= //
+
+int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/test/skip_with_error_test.cc b/3rdparty/benchmark/test/skip_with_error_test.cc
new file mode 100644
index 00000000..026d4791
--- /dev/null
+++ b/3rdparty/benchmark/test/skip_with_error_test.cc
@@ -0,0 +1,196 @@
+
+#undef NDEBUG
+#include <cassert>
+#include <vector>
+
+#include "../src/check.h"  // NOTE: check.h is for internal use only!
+#include "benchmark/benchmark.h"
+
+namespace {
+
+class TestReporter : public benchmark::ConsoleReporter {
+ public:
+  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE {
+    return ConsoleReporter::ReportContext(context);
+  };
+
+  virtual void ReportRuns(const std::vector<Run>& report) BENCHMARK_OVERRIDE {
+    all_runs_.insert(all_runs_.end(), begin(report), end(report));
+    ConsoleReporter::ReportRuns(report);
+  }
+
+  TestReporter() {}
+  virtual ~TestReporter() {}
+
+  mutable std::vector<Run> all_runs_;
+};
+
+struct TestCase {
+  std::string name;
+  bool error_occurred;
+  std::string error_message;
+
+  typedef benchmark::BenchmarkReporter::Run Run;
+
+  void CheckRun(Run const& run) const {
+    BM_CHECK(name == run.benchmark_name())
+        << "expected " << name << " got " << run.benchmark_name();
+    BM_CHECK(error_occurred == run.error_occurred);
+    BM_CHECK(error_message == run.error_message);
+    if (error_occurred) {
+      // BM_CHECK(run.iterations == 0);
+    } else {
+      BM_CHECK(run.iterations != 0);
+    }
+  }
+};
+
+std::vector<TestCase> ExpectedResults;
+
+int AddCases(const char* base_name, std::initializer_list<TestCase> const& v) {
+  for (auto TC : v) {
+    TC.name = base_name + TC.name;
+    ExpectedResults.push_back(std::move(TC));
+  }
+  return 0;
+}
+
+#define CONCAT(x, y) CONCAT2(x, y)
+#define CONCAT2(x, y) x##y
+#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = AddCases(__VA_ARGS__)
+
+}  // end namespace
+
+void BM_error_no_running(benchmark::State& state) {
+  state.SkipWithError("error message");
+}
+BENCHMARK(BM_error_no_running);
+ADD_CASES("BM_error_no_running", {{"", true, "error message"}});
+
+void BM_error_before_running(benchmark::State& state) {
+  state.SkipWithError("error message");
+  while (state.KeepRunning()) {
+    assert(false);
+  }
+}
+BENCHMARK(BM_error_before_running);
+ADD_CASES("BM_error_before_running", {{"", true, "error message"}});
+
+void BM_error_before_running_batch(benchmark::State& state) {
+  state.SkipWithError("error message");
+  while (state.KeepRunningBatch(17)) {
+    assert(false);
+  }
+}
+BENCHMARK(BM_error_before_running_batch);
+ADD_CASES("BM_error_before_running_batch", {{"", true, "error message"}});
+
+void BM_error_before_running_range_for(benchmark::State& state) {
+  state.SkipWithError("error message");
+  for (auto _ : state) {
+    assert(false);
+  }
+}
+BENCHMARK(BM_error_before_running_range_for);
+ADD_CASES("BM_error_before_running_range_for", {{"", true, "error message"}});
+
+void BM_error_during_running(benchmark::State& state) {
+  int first_iter = true;
+  while (state.KeepRunning()) {
+    if (state.range(0) == 1 && state.thread_index() <= (state.threads() / 2)) {
+      assert(first_iter);
+      first_iter = false;
+      state.SkipWithError("error message");
+    } else {
+      state.PauseTiming();
+      state.ResumeTiming();
+    }
+  }
+}
+BENCHMARK(BM_error_during_running)->Arg(1)->Arg(2)->ThreadRange(1, 8);
+ADD_CASES("BM_error_during_running", {{"/1/threads:1", true, "error message"},
+                                      {"/1/threads:2", true, "error message"},
+                                      {"/1/threads:4", true, "error message"},
+                                      {"/1/threads:8", true, "error message"},
+                                      {"/2/threads:1", false, ""},
+                                      {"/2/threads:2", false, ""},
+                                      {"/2/threads:4", false, ""},
+                                      {"/2/threads:8", false, ""}});
+
+void BM_error_during_running_ranged_for(benchmark::State& state) {
+  assert(state.max_iterations > 3 && "test requires at least a few iterations");
+  bool first_iter = true;
+  // NOTE: Users should not write the for loop explicitly.
+  for (auto It = state.begin(), End = state.end(); It != End; ++It) {
+    if (state.range(0) == 1) {
+      assert(first_iter);
+      first_iter = false;
+      (void)first_iter;
+      state.SkipWithError("error message");
+      // Test the unfortunate but documented behavior that the ranged-for loop
+      // doesn't automatically terminate when SkipWithError is set.
+      assert(++It != End);
+      break;  // Required behavior
+    }
+  }
+}
+BENCHMARK(BM_error_during_running_ranged_for)->Arg(1)->Arg(2)->Iterations(5);
+ADD_CASES("BM_error_during_running_ranged_for",
+          {{"/1/iterations:5", true, "error message"},
+           {"/2/iterations:5", false, ""}});
+
+void BM_error_after_running(benchmark::State& state) {
+  for (auto _ : state) {
+    benchmark::DoNotOptimize(state.iterations());
+  }
+  if (state.thread_index() <= (state.threads() / 2))
+    state.SkipWithError("error message");
+}
+BENCHMARK(BM_error_after_running)->ThreadRange(1, 8);
+ADD_CASES("BM_error_after_running", {{"/threads:1", true, "error message"},
+                                     {"/threads:2", true, "error message"},
+                                     {"/threads:4", true, "error message"},
+                                     {"/threads:8", true, "error message"}});
+
+void BM_error_while_paused(benchmark::State& state) {
+  bool first_iter = true;
+  while (state.KeepRunning()) {
+    if (state.range(0) == 1 && state.thread_index() <= (state.threads() / 2)) {
+      assert(first_iter);
+      first_iter = false;
+      state.PauseTiming();
+      state.SkipWithError("error message");
+    } else {
+      state.PauseTiming();
+      state.ResumeTiming();
+    }
+  }
+}
+BENCHMARK(BM_error_while_paused)->Arg(1)->Arg(2)->ThreadRange(1, 8);
+ADD_CASES("BM_error_while_paused", {{"/1/threads:1", true, "error message"},
+                                    {"/1/threads:2", true, "error message"},
+                                    {"/1/threads:4", true, "error message"},
+                                    {"/1/threads:8", true, "error message"},
+                                    {"/2/threads:1", false, ""},
+                                    {"/2/threads:2", false, ""},
+                                    {"/2/threads:4", false, ""},
+                                    {"/2/threads:8", false, ""}});
+
+int main(int argc, char* argv[]) {
+  benchmark::Initialize(&argc, argv);
+
+  TestReporter test_reporter;
+  benchmark::RunSpecifiedBenchmarks(&test_reporter);
+
+  typedef benchmark::BenchmarkReporter::Run Run;
+  auto EB = ExpectedResults.begin();
+
+  for (Run const& run : test_reporter.all_runs_) {
+    assert(EB != ExpectedResults.end());
+    EB->CheckRun(run);
+    ++EB;
+  }
+  assert(EB == ExpectedResults.end());
+
+  return 0;
+}
diff --git a/3rdparty/benchmark/test/spec_arg_test.cc b/3rdparty/benchmark/test/spec_arg_test.cc
new file mode 100644
index 00000000..043db1be
--- /dev/null
+++ b/3rdparty/benchmark/test/spec_arg_test.cc
@@ -0,0 +1,95 @@
+#include <algorithm>
+#include <cassert>
+#include <cstdint>
+#include <cstdlib>
+#include <cstring>
+#include <iostream>
+#include <limits>
+#include <string>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+
+// Tests that we can override benchmark-spec value from FLAGS_benchmark_filter
+// with argument to RunSpecifiedBenchmarks(...).
+
+namespace {
+
+class TestReporter : public benchmark::ConsoleReporter {
+ public:
+  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE {
+    return ConsoleReporter::ReportContext(context);
+  };
+
+  virtual void ReportRuns(const std::vector<Run>& report) BENCHMARK_OVERRIDE {
+    assert(report.size() == 1);
+    matched_functions.push_back(report[0].run_name.function_name);
+    ConsoleReporter::ReportRuns(report);
+  };
+
+  TestReporter() {}
+
+  virtual ~TestReporter() {}
+
+  const std::vector<std::string>& GetMatchedFunctions() const {
+    return matched_functions;
+  }
+
+ private:
+  std::vector<std::string> matched_functions;
+};
+
+}  // end namespace
+
+static void BM_NotChosen(benchmark::State& state) {
+  assert(false && "SHOULD NOT BE CALLED");
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_NotChosen);
+
+static void BM_Chosen(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+}
+BENCHMARK(BM_Chosen);
+
+int main(int argc, char** argv) {
+  const std::string flag = "BM_NotChosen";
+
+  // Verify that argv specify --benchmark_filter=BM_NotChosen.
+  bool found = false;
+  for (int i = 0; i < argc; ++i) {
+    if (strcmp("--benchmark_filter=BM_NotChosen", argv[i]) == 0) {
+      found = true;
+      break;
+    }
+  }
+  assert(found);
+
+  benchmark::Initialize(&argc, argv);
+
+  // Check that the current flag value is reported accurately via the
+  // GetBenchmarkFilter() function.
+  if (flag != benchmark::GetBenchmarkFilter()) {
+    std::cerr
+        << "Seeing different value for flags. GetBenchmarkFilter() returns ["
+        << benchmark::GetBenchmarkFilter() << "] expected flag=[" << flag
+        << "]\n";
+    return 1;
+  }
+  TestReporter test_reporter;
+  const char* const spec = "BM_Chosen";
+  const size_t returned_count =
+      benchmark::RunSpecifiedBenchmarks(&test_reporter, spec);
+  assert(returned_count == 1);
+  const std::vector<std::string> matched_functions =
+      test_reporter.GetMatchedFunctions();
+  assert(matched_functions.size() == 1);
+  if (strcmp(spec, matched_functions.front().c_str()) != 0) {
+    std::cerr << "Expected benchmark [" << spec << "] to run, but got ["
+              << matched_functions.front() << "]\n";
+    return 2;
+  }
+  return 0;
+}
diff --git a/3rdparty/benchmark/test/state_assembly_test.cc b/3rdparty/benchmark/test/state_assembly_test.cc
new file mode 100644
index 00000000..7ddbb3b2
--- /dev/null
+++ b/3rdparty/benchmark/test/state_assembly_test.cc
@@ -0,0 +1,68 @@
+#include <benchmark/benchmark.h>
+
+#ifdef __clang__
+#pragma clang diagnostic ignored "-Wreturn-type"
+#endif
+
+// clang-format off
+extern "C" {
+  extern int ExternInt;
+  benchmark::State& GetState();
+  void Fn();
+}
+// clang-format on
+
+using benchmark::State;
+
+// CHECK-LABEL: test_for_auto_loop:
+extern "C" int test_for_auto_loop() {
+  State& S = GetState();
+  int x = 42;
+  // CHECK: 	[[CALL:call(q)*]]	_ZN9benchmark5State16StartKeepRunningEv
+  // CHECK-NEXT: testq %rbx, %rbx
+  // CHECK-NEXT: je [[LOOP_END:.*]]
+
+  for (auto _ : S) {
+    // CHECK: .L[[LOOP_HEAD:[a-zA-Z0-9_]+]]:
+    // CHECK-GNU-NEXT: subq $1, %rbx
+    // CHECK-CLANG-NEXT: {{(addq \$1, %rax|incq %rax|addq \$-1, %rbx)}}
+    // CHECK-NEXT: jne .L[[LOOP_HEAD]]
+    benchmark::DoNotOptimize(x);
+  }
+  // CHECK: [[LOOP_END]]:
+  // CHECK: [[CALL]]	_ZN9benchmark5State17FinishKeepRunningEv
+
+  // CHECK: movl $101, %eax
+  // CHECK: ret
+  return 101;
+}
+
+// CHECK-LABEL: test_while_loop:
+extern "C" int test_while_loop() {
+  State& S = GetState();
+  int x = 42;
+
+  // CHECK: j{{(e|mp)}} .L[[LOOP_HEADER:[a-zA-Z0-9_]+]]
+  // CHECK-NEXT: .L[[LOOP_BODY:[a-zA-Z0-9_]+]]:
+  while (S.KeepRunning()) {
+    // CHECK-GNU-NEXT: subq $1, %[[IREG:[a-z]+]]
+    // CHECK-CLANG-NEXT: {{(addq \$-1,|decq)}} %[[IREG:[a-z]+]]
+    // CHECK: movq %[[IREG]], [[DEST:.*]]
+    benchmark::DoNotOptimize(x);
+  }
+  // CHECK-DAG: movq [[DEST]], %[[IREG]]
+  // CHECK-DAG: testq %[[IREG]], %[[IREG]]
+  // CHECK-DAG: jne .L[[LOOP_BODY]]
+  // CHECK-DAG: .L[[LOOP_HEADER]]:
+
+  // CHECK: cmpb $0
+  // CHECK-NEXT: jne .L[[LOOP_END:[a-zA-Z0-9_]+]]
+  // CHECK: [[CALL:call(q)*]] _ZN9benchmark5State16StartKeepRunningEv
+
+  // CHECK: .L[[LOOP_END]]:
+  // CHECK: [[CALL]] _ZN9benchmark5State17FinishKeepRunningEv
+
+  // CHECK: movl $101, %eax
+  // CHECK: ret
+  return 101;
+}
diff --git a/3rdparty/benchmark/test/statistics_gtest.cc b/3rdparty/benchmark/test/statistics_gtest.cc
new file mode 100644
index 00000000..1de2d87d
--- /dev/null
+++ b/3rdparty/benchmark/test/statistics_gtest.cc
@@ -0,0 +1,35 @@
+//===---------------------------------------------------------------------===//
+// statistics_test - Unit tests for src/statistics.cc
+//===---------------------------------------------------------------------===//
+
+#include "../src/statistics.h"
+#include "gtest/gtest.h"
+
+namespace {
+TEST(StatisticsTest, Mean) {
+  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({42, 42, 42, 42}), 42.0);
+  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({1, 2, 3, 4}), 2.5);
+  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({1, 2, 5, 10, 10, 14}), 7.0);
+}
+
+TEST(StatisticsTest, Median) {
+  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({42, 42, 42, 42}), 42.0);
+  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({1, 2, 3, 4}), 2.5);
+  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({1, 2, 5, 10, 10}), 5.0);
+}
+
+TEST(StatisticsTest, StdDev) {
+  EXPECT_DOUBLE_EQ(benchmark::StatisticsStdDev({101, 101, 101, 101}), 0.0);
+  EXPECT_DOUBLE_EQ(benchmark::StatisticsStdDev({1, 2, 3}), 1.0);
+  EXPECT_DOUBLE_EQ(benchmark::StatisticsStdDev({2.5, 2.4, 3.3, 4.2, 5.1}),
+                   1.151086443322134);
+}
+
+TEST(StatisticsTest, CV) {
+  EXPECT_DOUBLE_EQ(benchmark::StatisticsCV({101, 101, 101, 101}), 0.0);
+  EXPECT_DOUBLE_EQ(benchmark::StatisticsCV({1, 2, 3}), 1. / 2.);
+  EXPECT_DOUBLE_EQ(benchmark::StatisticsCV({2.5, 2.4, 3.3, 4.2, 5.1}),
+                   0.32888184094918121);
+}
+
+}  // end namespace
diff --git a/3rdparty/benchmark/test/string_util_gtest.cc b/3rdparty/benchmark/test/string_util_gtest.cc
new file mode 100644
index 00000000..698f2d43
--- /dev/null
+++ b/3rdparty/benchmark/test/string_util_gtest.cc
@@ -0,0 +1,152 @@
+//===---------------------------------------------------------------------===//
+// statistics_test - Unit tests for src/statistics.cc
+//===---------------------------------------------------------------------===//
+
+#include "../src/internal_macros.h"
+#include "../src/string_util.h"
+#include "gtest/gtest.h"
+
+namespace {
+TEST(StringUtilTest, stoul) {
+  {
+    size_t pos = 0;
+    EXPECT_EQ(0ul, benchmark::stoul("0", &pos));
+    EXPECT_EQ(1ul, pos);
+  }
+  {
+    size_t pos = 0;
+    EXPECT_EQ(7ul, benchmark::stoul("7", &pos));
+    EXPECT_EQ(1ul, pos);
+  }
+  {
+    size_t pos = 0;
+    EXPECT_EQ(135ul, benchmark::stoul("135", &pos));
+    EXPECT_EQ(3ul, pos);
+  }
+#if ULONG_MAX == 0xFFFFFFFFul
+  {
+    size_t pos = 0;
+    EXPECT_EQ(0xFFFFFFFFul, benchmark::stoul("4294967295", &pos));
+    EXPECT_EQ(10ul, pos);
+  }
+#elif ULONG_MAX == 0xFFFFFFFFFFFFFFFFul
+  {
+    size_t pos = 0;
+    EXPECT_EQ(0xFFFFFFFFFFFFFFFFul,
+              benchmark::stoul("18446744073709551615", &pos));
+    EXPECT_EQ(20ul, pos);
+  }
+#endif
+  {
+    size_t pos = 0;
+    EXPECT_EQ(10ul, benchmark::stoul("1010", &pos, 2));
+    EXPECT_EQ(4ul, pos);
+  }
+  {
+    size_t pos = 0;
+    EXPECT_EQ(520ul, benchmark::stoul("1010", &pos, 8));
+    EXPECT_EQ(4ul, pos);
+  }
+  {
+    size_t pos = 0;
+    EXPECT_EQ(1010ul, benchmark::stoul("1010", &pos, 10));
+    EXPECT_EQ(4ul, pos);
+  }
+  {
+    size_t pos = 0;
+    EXPECT_EQ(4112ul, benchmark::stoul("1010", &pos, 16));
+    EXPECT_EQ(4ul, pos);
+  }
+  {
+    size_t pos = 0;
+    EXPECT_EQ(0xBEEFul, benchmark::stoul("BEEF", &pos, 16));
+    EXPECT_EQ(4ul, pos);
+  }
+#ifndef BENCHMARK_HAS_NO_EXCEPTIONS
+  { ASSERT_THROW(benchmark::stoul("this is a test"), std::invalid_argument); }
+#endif
+}
+
+TEST(StringUtilTest, stoi){{size_t pos = 0;
+EXPECT_EQ(0, benchmark::stoi("0", &pos));
+EXPECT_EQ(1ul, pos);
+}  // namespace
+{
+  size_t pos = 0;
+  EXPECT_EQ(-17, benchmark::stoi("-17", &pos));
+  EXPECT_EQ(3ul, pos);
+}
+{
+  size_t pos = 0;
+  EXPECT_EQ(1357, benchmark::stoi("1357", &pos));
+  EXPECT_EQ(4ul, pos);
+}
+{
+  size_t pos = 0;
+  EXPECT_EQ(10, benchmark::stoi("1010", &pos, 2));
+  EXPECT_EQ(4ul, pos);
+}
+{
+  size_t pos = 0;
+  EXPECT_EQ(520, benchmark::stoi("1010", &pos, 8));
+  EXPECT_EQ(4ul, pos);
+}
+{
+  size_t pos = 0;
+  EXPECT_EQ(1010, benchmark::stoi("1010", &pos, 10));
+  EXPECT_EQ(4ul, pos);
+}
+{
+  size_t pos = 0;
+  EXPECT_EQ(4112, benchmark::stoi("1010", &pos, 16));
+  EXPECT_EQ(4ul, pos);
+}
+{
+  size_t pos = 0;
+  EXPECT_EQ(0xBEEF, benchmark::stoi("BEEF", &pos, 16));
+  EXPECT_EQ(4ul, pos);
+}
+#ifndef BENCHMARK_HAS_NO_EXCEPTIONS
+{ ASSERT_THROW(benchmark::stoi("this is a test"), std::invalid_argument); }
+#endif
+}
+
+TEST(StringUtilTest, stod){{size_t pos = 0;
+EXPECT_EQ(0.0, benchmark::stod("0", &pos));
+EXPECT_EQ(1ul, pos);
+}
+{
+  size_t pos = 0;
+  EXPECT_EQ(-84.0, benchmark::stod("-84", &pos));
+  EXPECT_EQ(3ul, pos);
+}
+{
+  size_t pos = 0;
+  EXPECT_EQ(1234.0, benchmark::stod("1234", &pos));
+  EXPECT_EQ(4ul, pos);
+}
+{
+  size_t pos = 0;
+  EXPECT_EQ(1.5, benchmark::stod("1.5", &pos));
+  EXPECT_EQ(3ul, pos);
+}
+{
+  size_t pos = 0;
+  /* Note: exactly representable as double */
+  EXPECT_EQ(-1.25e+9, benchmark::stod("-1.25e+9", &pos));
+  EXPECT_EQ(8ul, pos);
+}
+#ifndef BENCHMARK_HAS_NO_EXCEPTIONS
+{ ASSERT_THROW(benchmark::stod("this is a test"), std::invalid_argument); }
+#endif
+}
+
+TEST(StringUtilTest, StrSplit) {
+  EXPECT_EQ(benchmark::StrSplit("", ','), std::vector<std::string>{});
+  EXPECT_EQ(benchmark::StrSplit("hello", ','),
+            std::vector<std::string>({"hello"}));
+  EXPECT_EQ(benchmark::StrSplit("hello,there,is,more", ','),
+            std::vector<std::string>({"hello", "there", "is", "more"}));
+}
+
+}  // end namespace
diff --git a/3rdparty/benchmark/test/templated_fixture_test.cc b/3rdparty/benchmark/test/templated_fixture_test.cc
new file mode 100644
index 00000000..af239c3a
--- /dev/null
+++ b/3rdparty/benchmark/test/templated_fixture_test.cc
@@ -0,0 +1,28 @@
+
+#include <cassert>
+#include <memory>
+
+#include "benchmark/benchmark.h"
+
+template <typename T>
+class MyFixture : public ::benchmark::Fixture {
+ public:
+  MyFixture() : data(0) {}
+
+  T data;
+};
+
+BENCHMARK_TEMPLATE_F(MyFixture, Foo, int)(benchmark::State& st) {
+  for (auto _ : st) {
+    data += 1;
+  }
+}
+
+BENCHMARK_TEMPLATE_DEFINE_F(MyFixture, Bar, double)(benchmark::State& st) {
+  for (auto _ : st) {
+    data += 1.0;
+  }
+}
+BENCHMARK_REGISTER_F(MyFixture, Bar);
+
+BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/user_counters_tabular_test.cc b/3rdparty/benchmark/test/user_counters_tabular_test.cc
new file mode 100644
index 00000000..45ac043d
--- /dev/null
+++ b/3rdparty/benchmark/test/user_counters_tabular_test.cc
@@ -0,0 +1,557 @@
+
+#undef NDEBUG
+
+#include "benchmark/benchmark.h"
+#include "output_test.h"
+
+// @todo: <jpmag> this checks the full output at once; the rule for
+// CounterSet1 was failing because it was not matching "^[-]+$".
+// @todo: <jpmag> check that the counters are vertically aligned.
+ADD_CASES(TC_ConsoleOut,
+          {
+              // keeping these lines long improves readability, so:
+              // clang-format off
+    {"^[-]+$", MR_Next},
+    {"^Benchmark %s Time %s CPU %s Iterations %s Bar %s Bat %s Baz %s Foo %s Frob %s Lob$", MR_Next},
+    {"^[-]+$", MR_Next},
+      {"^BM_Counters_Tabular/repeats:2/threads:1 %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+      {"^BM_Counters_Tabular/repeats:2/threads:1 %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+      {"^BM_Counters_Tabular/repeats:2/threads:1_mean %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+      {"^BM_Counters_Tabular/repeats:2/threads:1_median %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+            {"^BM_Counters_Tabular/repeats:2/threads:1_stddev %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+            {"^BM_Counters_Tabular/repeats:2/threads:1_cv %console_percentage_report [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*%$", MR_Next},
+      {"^BM_Counters_Tabular/repeats:2/threads:2 %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+      {"^BM_Counters_Tabular/repeats:2/threads:2 %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+      {"^BM_Counters_Tabular/repeats:2/threads:2_mean %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+      {"^BM_Counters_Tabular/repeats:2/threads:2_median %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+            {"^BM_Counters_Tabular/repeats:2/threads:2_stddev %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+            {"^BM_Counters_Tabular/repeats:2/threads:2_cv %console_percentage_report [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*%$", MR_Next},
+    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
+    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
+    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
+    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
+    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
+    {"^[-]+$", MR_Next},
+    {"^Benchmark %s Time %s CPU %s Iterations %s Bar %s Baz %s Foo$", MR_Next},
+    {"^[-]+$", MR_Next},
+    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^[-]+$", MR_Next},
+    {"^Benchmark %s Time %s CPU %s Iterations %s Bat %s Baz %s Foo$", MR_Next},
+    {"^[-]+$", MR_Next},
+    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
+    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$"},
+              // clang-format on
+          });
+ADD_CASES(TC_CSVOut, {{"%csv_header,"
+                       "\"Bar\",\"Bat\",\"Baz\",\"Foo\",\"Frob\",\"Lob\""}});
+
+// ========================================================================= //
+// ------------------------- Tabular Counters Output ----------------------- //
+// ========================================================================= //
+
+void BM_Counters_Tabular(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+  namespace bm = benchmark;
+  state.counters.insert({
+      {"Foo", {1, bm::Counter::kAvgThreads}},
+      {"Bar", {2, bm::Counter::kAvgThreads}},
+      {"Baz", {4, bm::Counter::kAvgThreads}},
+      {"Bat", {8, bm::Counter::kAvgThreads}},
+      {"Frob", {16, bm::Counter::kAvgThreads}},
+      {"Lob", {32, bm::Counter::kAvgThreads}},
+  });
+}
+BENCHMARK(BM_Counters_Tabular)->ThreadRange(1, 2)->Repetitions(2);
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$",
+            MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Bat\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float,$", MR_Next},
+           {"\"Frob\": %float,$", MR_Next},
+           {"\"Lob\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$",
+            MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"repetition_index\": 1,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Bat\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float,$", MR_Next},
+           {"\"Frob\": %float,$", MR_Next},
+           {"\"Lob\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:1_mean\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$",
+            MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"mean\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Bat\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float,$", MR_Next},
+           {"\"Frob\": %float,$", MR_Next},
+           {"\"Lob\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:1_median\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$",
+            MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"median\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Bat\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float,$", MR_Next},
+           {"\"Frob\": %float,$", MR_Next},
+           {"\"Lob\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:1_stddev\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$",
+            MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"stddev\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Bat\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float,$", MR_Next},
+           {"\"Frob\": %float,$", MR_Next},
+           {"\"Lob\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:1_cv\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$",
+            MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"cv\",$", MR_Next},
+           {"\"aggregate_unit\": \"percentage\",$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Bat\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float,$", MR_Next},
+           {"\"Frob\": %float,$", MR_Next},
+           {"\"Lob\": %float$", MR_Next},
+           {"}", MR_Next}});
+
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 1,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$",
+            MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 2,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Bat\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float,$", MR_Next},
+           {"\"Frob\": %float,$", MR_Next},
+           {"\"Lob\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 1,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$",
+            MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"repetition_index\": 1,$", MR_Next},
+           {"\"threads\": 2,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Bat\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float,$", MR_Next},
+           {"\"Frob\": %float,$", MR_Next},
+           {"\"Lob\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:2_median\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 1,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$",
+            MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 2,$", MR_Next},
+           {"\"aggregate_name\": \"median\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Bat\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float,$", MR_Next},
+           {"\"Frob\": %float,$", MR_Next},
+           {"\"Lob\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:2_stddev\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 1,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$",
+            MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 2,$", MR_Next},
+           {"\"aggregate_name\": \"stddev\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Bat\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float,$", MR_Next},
+           {"\"Frob\": %float,$", MR_Next},
+           {"\"Lob\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:2_cv\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 1,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$",
+            MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 2,$", MR_Next},
+           {"\"aggregate_name\": \"cv\",$", MR_Next},
+           {"\"aggregate_unit\": \"percentage\",$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Bat\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float,$", MR_Next},
+           {"\"Frob\": %float,$", MR_Next},
+           {"\"Lob\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_Tabular/repeats:2/threads:1\",%csv_report,"
+            "%float,%float,%float,%float,%float,%float$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_Tabular/repeats:2/threads:1\",%csv_report,"
+            "%float,%float,%float,%float,%float,%float$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_Tabular/repeats:2/threads:1_mean\",%csv_report,"
+            "%float,%float,%float,%float,%float,%float$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_Tabular/repeats:2/threads:1_median\",%csv_report,"
+            "%float,%float,%float,%float,%float,%float$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_Tabular/repeats:2/threads:1_stddev\",%csv_report,"
+            "%float,%float,%float,%float,%float,%float$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_Tabular/repeats:2/threads:1_cv\",%csv_report,"
+            "%float,%float,%float,%float,%float,%float$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_Tabular/repeats:2/threads:2\",%csv_report,"
+            "%float,%float,%float,%float,%float,%float$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_Tabular/repeats:2/threads:2\",%csv_report,"
+            "%float,%float,%float,%float,%float,%float$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_Tabular/repeats:2/threads:2_mean\",%csv_report,"
+            "%float,%float,%float,%float,%float,%float$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_Tabular/repeats:2/threads:2_median\",%csv_report,"
+            "%float,%float,%float,%float,%float,%float$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_Tabular/repeats:2/threads:2_stddev\",%csv_report,"
+            "%float,%float,%float,%float,%float,%float$"}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_Tabular/repeats:2/threads:2_cv\",%csv_report,"
+            "%float,%float,%float,%float,%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckTabular(Results const& e) {
+  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 1);
+  CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 2);
+  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 4);
+  CHECK_COUNTER_VALUE(e, int, "Bat", EQ, 8);
+  CHECK_COUNTER_VALUE(e, int, "Frob", EQ, 16);
+  CHECK_COUNTER_VALUE(e, int, "Lob", EQ, 32);
+}
+CHECK_BENCHMARK_RESULTS("BM_Counters_Tabular/repeats:2/threads:1$",
+                        &CheckTabular);
+CHECK_BENCHMARK_RESULTS("BM_Counters_Tabular/repeats:2/threads:2$",
+                        &CheckTabular);
+
+// ========================================================================= //
+// -------------------- Tabular+Rate Counters Output ----------------------- //
+// ========================================================================= //
+
+void BM_CounterRates_Tabular(benchmark::State& state) {
+  for (auto _ : state) {
+    // This test requires a non-zero CPU time to avoid divide-by-zero
+    benchmark::DoNotOptimize(state.iterations());
+  }
+  namespace bm = benchmark;
+  state.counters.insert({
+      {"Foo", {1, bm::Counter::kAvgThreadsRate}},
+      {"Bar", {2, bm::Counter::kAvgThreadsRate}},
+      {"Baz", {4, bm::Counter::kAvgThreadsRate}},
+      {"Bat", {8, bm::Counter::kAvgThreadsRate}},
+      {"Frob", {16, bm::Counter::kAvgThreadsRate}},
+      {"Lob", {32, bm::Counter::kAvgThreadsRate}},
+  });
+}
+BENCHMARK(BM_CounterRates_Tabular)->ThreadRange(1, 16);
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_CounterRates_Tabular/threads:%int\",$"},
+           {"\"family_index\": 1,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_CounterRates_Tabular/threads:%int\",$",
+            MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Bat\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float,$", MR_Next},
+           {"\"Frob\": %float,$", MR_Next},
+           {"\"Lob\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_CounterRates_Tabular/threads:%int\",%csv_report,"
+                       "%float,%float,%float,%float,%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckTabularRate(Results const& e) {
+  double t = e.DurationCPUTime();
+  CHECK_FLOAT_COUNTER_VALUE(e, "Foo", EQ, 1. / t, 0.001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "Bar", EQ, 2. / t, 0.001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "Baz", EQ, 4. / t, 0.001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "Bat", EQ, 8. / t, 0.001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "Frob", EQ, 16. / t, 0.001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "Lob", EQ, 32. / t, 0.001);
+}
+CHECK_BENCHMARK_RESULTS("BM_CounterRates_Tabular/threads:%int",
+                        &CheckTabularRate);
+
+// ========================================================================= //
+// ------------------------- Tabular Counters Output ----------------------- //
+// ========================================================================= //
+
+// set only some of the counters
+void BM_CounterSet0_Tabular(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+  namespace bm = benchmark;
+  state.counters.insert({
+      {"Foo", {10, bm::Counter::kAvgThreads}},
+      {"Bar", {20, bm::Counter::kAvgThreads}},
+      {"Baz", {40, bm::Counter::kAvgThreads}},
+  });
+}
+BENCHMARK(BM_CounterSet0_Tabular)->ThreadRange(1, 16);
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_CounterSet0_Tabular/threads:%int\",$"},
+           {"\"family_index\": 2,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_CounterSet0_Tabular/threads:%int\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet0_Tabular/threads:%int\",%csv_report,"
+                       "%float,,%float,%float,,"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckSet0(Results const& e) {
+  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 10);
+  CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 20);
+  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 40);
+}
+CHECK_BENCHMARK_RESULTS("BM_CounterSet0_Tabular", &CheckSet0);
+
+// again.
+void BM_CounterSet1_Tabular(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+  namespace bm = benchmark;
+  state.counters.insert({
+      {"Foo", {15, bm::Counter::kAvgThreads}},
+      {"Bar", {25, bm::Counter::kAvgThreads}},
+      {"Baz", {45, bm::Counter::kAvgThreads}},
+  });
+}
+BENCHMARK(BM_CounterSet1_Tabular)->ThreadRange(1, 16);
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_CounterSet1_Tabular/threads:%int\",$"},
+           {"\"family_index\": 3,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_CounterSet1_Tabular/threads:%int\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bar\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet1_Tabular/threads:%int\",%csv_report,"
+                       "%float,,%float,%float,,"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckSet1(Results const& e) {
+  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 15);
+  CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 25);
+  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 45);
+}
+CHECK_BENCHMARK_RESULTS("BM_CounterSet1_Tabular/threads:%int", &CheckSet1);
+
+// ========================================================================= //
+// ------------------------- Tabular Counters Output ----------------------- //
+// ========================================================================= //
+
+// set only some of the counters, different set now.
+void BM_CounterSet2_Tabular(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+  namespace bm = benchmark;
+  state.counters.insert({
+      {"Foo", {10, bm::Counter::kAvgThreads}},
+      {"Bat", {30, bm::Counter::kAvgThreads}},
+      {"Baz", {40, bm::Counter::kAvgThreads}},
+  });
+}
+BENCHMARK(BM_CounterSet2_Tabular)->ThreadRange(1, 16);
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_CounterSet2_Tabular/threads:%int\",$"},
+           {"\"family_index\": 4,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_CounterSet2_Tabular/threads:%int\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"Bat\": %float,$", MR_Next},
+           {"\"Baz\": %float,$", MR_Next},
+           {"\"Foo\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet2_Tabular/threads:%int\",%csv_report,"
+                       ",%float,%float,%float,,"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckSet2(Results const& e) {
+  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 10);
+  CHECK_COUNTER_VALUE(e, int, "Bat", EQ, 30);
+  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 40);
+}
+CHECK_BENCHMARK_RESULTS("BM_CounterSet2_Tabular", &CheckSet2);
+
+// ========================================================================= //
+// --------------------------- TEST CASES END ------------------------------ //
+// ========================================================================= //
+
+int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/test/user_counters_test.cc b/3rdparty/benchmark/test/user_counters_test.cc
new file mode 100644
index 00000000..1cc74552
--- /dev/null
+++ b/3rdparty/benchmark/test/user_counters_test.cc
@@ -0,0 +1,555 @@
+
+#undef NDEBUG
+
+#include "benchmark/benchmark.h"
+#include "output_test.h"
+
+// ========================================================================= //
+// ---------------------- Testing Prologue Output -------------------------- //
+// ========================================================================= //
+
+// clang-format off
+
+ADD_CASES(TC_ConsoleOut,
+          {{"^[-]+$", MR_Next},
+           {"^Benchmark %s Time %s CPU %s Iterations UserCounters...$", MR_Next},
+           {"^[-]+$", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"%csv_header,\"bar\",\"foo\""}});
+
+// clang-format on
+
+// ========================================================================= //
+// ------------------------- Simple Counters Output ------------------------ //
+// ========================================================================= //
+
+void BM_Counters_Simple(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+  state.counters["foo"] = 1;
+  state.counters["bar"] = 2 * static_cast<double>(state.iterations());
+}
+BENCHMARK(BM_Counters_Simple);
+ADD_CASES(TC_ConsoleOut,
+          {{"^BM_Counters_Simple %console_report bar=%hrfloat foo=%hrfloat$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_Simple\",$"},
+                       {"\"family_index\": 0,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Counters_Simple\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\",$", MR_Next},
+                       {"\"bar\": %float,$", MR_Next},
+                       {"\"foo\": %float$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Simple\",%csv_report,%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckSimple(Results const& e) {
+  double its = e.NumIterations();
+  CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
+  // check that the value of bar is within 0.1% of the expected value
+  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. * its, 0.001);
+}
+CHECK_BENCHMARK_RESULTS("BM_Counters_Simple", &CheckSimple);
+
+// ========================================================================= //
+// --------------------- Counters+Items+Bytes/s Output --------------------- //
+// ========================================================================= //
+
+namespace {
+int num_calls1 = 0;
+}
+void BM_Counters_WithBytesAndItemsPSec(benchmark::State& state) {
+  for (auto _ : state) {
+    // This test requires a non-zero CPU time to avoid divide-by-zero
+    benchmark::DoNotOptimize(state.iterations());
+  }
+  state.counters["foo"] = 1;
+  state.counters["bar"] = ++num_calls1;
+  state.SetBytesProcessed(364);
+  state.SetItemsProcessed(150);
+}
+BENCHMARK(BM_Counters_WithBytesAndItemsPSec);
+ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_WithBytesAndItemsPSec %console_report "
+                           "bar=%hrfloat bytes_per_second=%hrfloat/s "
+                           "foo=%hrfloat items_per_second=%hrfloat/s$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_WithBytesAndItemsPSec\",$"},
+           {"\"family_index\": 1,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_WithBytesAndItemsPSec\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"bar\": %float,$", MR_Next},
+           {"\"bytes_per_second\": %float,$", MR_Next},
+           {"\"foo\": %float,$", MR_Next},
+           {"\"items_per_second\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_WithBytesAndItemsPSec\","
+                       "%csv_bytes_items_report,%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckBytesAndItemsPSec(Results const& e) {
+  double t = e.DurationCPUTime();  // this (and not real time) is the time used
+  CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
+  CHECK_COUNTER_VALUE(e, int, "bar", EQ, num_calls1);
+  // check that the values are within 0.1% of the expected values
+  CHECK_FLOAT_RESULT_VALUE(e, "bytes_per_second", EQ, 364. / t, 0.001);
+  CHECK_FLOAT_RESULT_VALUE(e, "items_per_second", EQ, 150. / t, 0.001);
+}
+CHECK_BENCHMARK_RESULTS("BM_Counters_WithBytesAndItemsPSec",
+                        &CheckBytesAndItemsPSec);
+
+// ========================================================================= //
+// ------------------------- Rate Counters Output -------------------------- //
+// ========================================================================= //
+
+void BM_Counters_Rate(benchmark::State& state) {
+  for (auto _ : state) {
+    // This test requires a non-zero CPU time to avoid divide-by-zero
+    benchmark::DoNotOptimize(state.iterations());
+  }
+  namespace bm = benchmark;
+  state.counters["foo"] = bm::Counter{1, bm::Counter::kIsRate};
+  state.counters["bar"] = bm::Counter{2, bm::Counter::kIsRate};
+}
+BENCHMARK(BM_Counters_Rate);
+ADD_CASES(
+    TC_ConsoleOut,
+    {{"^BM_Counters_Rate %console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_Rate\",$"},
+                       {"\"family_index\": 2,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Counters_Rate\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\",$", MR_Next},
+                       {"\"bar\": %float,$", MR_Next},
+                       {"\"foo\": %float$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Rate\",%csv_report,%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckRate(Results const& e) {
+  double t = e.DurationCPUTime();  // this (and not real time) is the time used
+  // check that the values are within 0.1% of the expected values
+  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / t, 0.001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / t, 0.001);
+}
+CHECK_BENCHMARK_RESULTS("BM_Counters_Rate", &CheckRate);
+
+// ========================================================================= //
+// ----------------------- Inverted Counters Output ------------------------ //
+// ========================================================================= //
+
+void BM_Invert(benchmark::State& state) {
+  for (auto _ : state) {
+    // This test requires a non-zero CPU time to avoid divide-by-zero
+    benchmark::DoNotOptimize(state.iterations());
+  }
+  namespace bm = benchmark;
+  state.counters["foo"] = bm::Counter{0.0001, bm::Counter::kInvert};
+  state.counters["bar"] = bm::Counter{10000, bm::Counter::kInvert};
+}
+BENCHMARK(BM_Invert);
+ADD_CASES(TC_ConsoleOut,
+          {{"^BM_Invert %console_report bar=%hrfloatu foo=%hrfloatk$"}});
+ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Invert\",$"},
+                       {"\"family_index\": 3,$", MR_Next},
+                       {"\"per_family_instance_index\": 0,$", MR_Next},
+                       {"\"run_name\": \"BM_Invert\",$", MR_Next},
+                       {"\"run_type\": \"iteration\",$", MR_Next},
+                       {"\"repetitions\": 1,$", MR_Next},
+                       {"\"repetition_index\": 0,$", MR_Next},
+                       {"\"threads\": 1,$", MR_Next},
+                       {"\"iterations\": %int,$", MR_Next},
+                       {"\"real_time\": %float,$", MR_Next},
+                       {"\"cpu_time\": %float,$", MR_Next},
+                       {"\"time_unit\": \"ns\",$", MR_Next},
+                       {"\"bar\": %float,$", MR_Next},
+                       {"\"foo\": %float$", MR_Next},
+                       {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_Invert\",%csv_report,%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckInvert(Results const& e) {
+  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 10000, 0.0001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 0.0001, 0.0001);
+}
+CHECK_BENCHMARK_RESULTS("BM_Invert", &CheckInvert);
+
+// ========================================================================= //
+// ------------------------- InvertedRate Counters Output
+// -------------------------- //
+// ========================================================================= //
+
+void BM_Counters_InvertedRate(benchmark::State& state) {
+  for (auto _ : state) {
+    // This test requires a non-zero CPU time to avoid divide-by-zero
+    benchmark::DoNotOptimize(state.iterations());
+  }
+  namespace bm = benchmark;
+  state.counters["foo"] =
+      bm::Counter{1, bm::Counter::kIsRate | bm::Counter::kInvert};
+  state.counters["bar"] =
+      bm::Counter{8192, bm::Counter::kIsRate | bm::Counter::kInvert};
+}
+BENCHMARK(BM_Counters_InvertedRate);
+ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_InvertedRate %console_report "
+                           "bar=%hrfloats foo=%hrfloats$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_InvertedRate\",$"},
+           {"\"family_index\": 4,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_InvertedRate\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"bar\": %float,$", MR_Next},
+           {"\"foo\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_InvertedRate\",%csv_report,%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckInvertedRate(Results const& e) {
+  double t = e.DurationCPUTime();  // this (and not real time) is the time used
+  // check that the values are within 0.1% of the expected values
+  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, t, 0.001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, t / 8192.0, 0.001);
+}
+CHECK_BENCHMARK_RESULTS("BM_Counters_InvertedRate", &CheckInvertedRate);
+
+// ========================================================================= //
+// ------------------------- Thread Counters Output ------------------------ //
+// ========================================================================= //
+
+void BM_Counters_Threads(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+  state.counters["foo"] = 1;
+  state.counters["bar"] = 2;
+}
+BENCHMARK(BM_Counters_Threads)->ThreadRange(1, 8);
+ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_Threads/threads:%int %console_report "
+                           "bar=%hrfloat foo=%hrfloat$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Threads/threads:%int\",$"},
+           {"\"family_index\": 5,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Threads/threads:%int\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"bar\": %float,$", MR_Next},
+           {"\"foo\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(
+    TC_CSVOut,
+    {{"^\"BM_Counters_Threads/threads:%int\",%csv_report,%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckThreads(Results const& e) {
+  CHECK_COUNTER_VALUE(e, int, "foo", EQ, e.NumThreads());
+  CHECK_COUNTER_VALUE(e, int, "bar", EQ, 2 * e.NumThreads());
+}
+CHECK_BENCHMARK_RESULTS("BM_Counters_Threads/threads:%int", &CheckThreads);
+
+// ========================================================================= //
+// ---------------------- ThreadAvg Counters Output ------------------------ //
+// ========================================================================= //
+
+void BM_Counters_AvgThreads(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+  namespace bm = benchmark;
+  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgThreads};
+  state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgThreads};
+}
+BENCHMARK(BM_Counters_AvgThreads)->ThreadRange(1, 8);
+ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgThreads/threads:%int "
+                           "%console_report bar=%hrfloat foo=%hrfloat$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_AvgThreads/threads:%int\",$"},
+           {"\"family_index\": 6,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_AvgThreads/threads:%int\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"bar\": %float,$", MR_Next},
+           {"\"foo\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(
+    TC_CSVOut,
+    {{"^\"BM_Counters_AvgThreads/threads:%int\",%csv_report,%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckAvgThreads(Results const& e) {
+  CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
+  CHECK_COUNTER_VALUE(e, int, "bar", EQ, 2);
+}
+CHECK_BENCHMARK_RESULTS("BM_Counters_AvgThreads/threads:%int",
+                        &CheckAvgThreads);
+
+// ========================================================================= //
+// ---------------------- ThreadAvg Counters Output ------------------------ //
+// ========================================================================= //
+
+void BM_Counters_AvgThreadsRate(benchmark::State& state) {
+  for (auto _ : state) {
+    // This test requires a non-zero CPU time to avoid divide-by-zero
+    benchmark::DoNotOptimize(state.iterations());
+  }
+  namespace bm = benchmark;
+  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgThreadsRate};
+  state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgThreadsRate};
+}
+BENCHMARK(BM_Counters_AvgThreadsRate)->ThreadRange(1, 8);
+ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgThreadsRate/threads:%int "
+                           "%console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_AvgThreadsRate/threads:%int\",$"},
+           {"\"family_index\": 7,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_AvgThreadsRate/threads:%int\",$",
+            MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"bar\": %float,$", MR_Next},
+           {"\"foo\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_AvgThreadsRate/"
+                       "threads:%int\",%csv_report,%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckAvgThreadsRate(Results const& e) {
+  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / e.DurationCPUTime(), 0.001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / e.DurationCPUTime(), 0.001);
+}
+CHECK_BENCHMARK_RESULTS("BM_Counters_AvgThreadsRate/threads:%int",
+                        &CheckAvgThreadsRate);
+
+// ========================================================================= //
+// ------------------- IterationInvariant Counters Output ------------------ //
+// ========================================================================= //
+
+void BM_Counters_IterationInvariant(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+  namespace bm = benchmark;
+  state.counters["foo"] = bm::Counter{1, bm::Counter::kIsIterationInvariant};
+  state.counters["bar"] = bm::Counter{2, bm::Counter::kIsIterationInvariant};
+}
+BENCHMARK(BM_Counters_IterationInvariant);
+ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_IterationInvariant %console_report "
+                           "bar=%hrfloat foo=%hrfloat$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_IterationInvariant\",$"},
+           {"\"family_index\": 8,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_IterationInvariant\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"bar\": %float,$", MR_Next},
+           {"\"foo\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_IterationInvariant\",%csv_report,%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckIterationInvariant(Results const& e) {
+  double its = e.NumIterations();
+  // check that the values are within 0.1% of the expected value
+  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, its, 0.001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. * its, 0.001);
+}
+CHECK_BENCHMARK_RESULTS("BM_Counters_IterationInvariant",
+                        &CheckIterationInvariant);
+
+// ========================================================================= //
+// ----------------- IterationInvariantRate Counters Output ---------------- //
+// ========================================================================= //
+
+void BM_Counters_kIsIterationInvariantRate(benchmark::State& state) {
+  for (auto _ : state) {
+    // This test requires a non-zero CPU time to avoid divide-by-zero
+    benchmark::DoNotOptimize(state.iterations());
+  }
+  namespace bm = benchmark;
+  state.counters["foo"] =
+      bm::Counter{1, bm::Counter::kIsIterationInvariantRate};
+  state.counters["bar"] =
+      bm::Counter{2, bm::Counter::kIsRate | bm::Counter::kIsIterationInvariant};
+}
+BENCHMARK(BM_Counters_kIsIterationInvariantRate);
+ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_kIsIterationInvariantRate "
+                           "%console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_kIsIterationInvariantRate\",$"},
+           {"\"family_index\": 9,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_kIsIterationInvariantRate\",$",
+            MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"bar\": %float,$", MR_Next},
+           {"\"foo\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_kIsIterationInvariantRate\",%csv_report,"
+                       "%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckIsIterationInvariantRate(Results const& e) {
+  double its = e.NumIterations();
+  double t = e.DurationCPUTime();  // this (and not real time) is the time used
+  // check that the values are within 0.1% of the expected values
+  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, its * 1. / t, 0.001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, its * 2. / t, 0.001);
+}
+CHECK_BENCHMARK_RESULTS("BM_Counters_kIsIterationInvariantRate",
+                        &CheckIsIterationInvariantRate);
+
+// ========================================================================= //
+// ------------------- AvgIterations Counters Output ------------------ //
+// ========================================================================= //
+
+void BM_Counters_AvgIterations(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+  namespace bm = benchmark;
+  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgIterations};
+  state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgIterations};
+}
+BENCHMARK(BM_Counters_AvgIterations);
+ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgIterations %console_report "
+                           "bar=%hrfloat foo=%hrfloat$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_AvgIterations\",$"},
+           {"\"family_index\": 10,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_AvgIterations\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"bar\": %float,$", MR_Next},
+           {"\"foo\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut,
+          {{"^\"BM_Counters_AvgIterations\",%csv_report,%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckAvgIterations(Results const& e) {
+  double its = e.NumIterations();
+  // check that the values are within 0.1% of the expected value
+  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / its, 0.001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / its, 0.001);
+}
+CHECK_BENCHMARK_RESULTS("BM_Counters_AvgIterations", &CheckAvgIterations);
+
+// ========================================================================= //
+// ----------------- AvgIterationsRate Counters Output ---------------- //
+// ========================================================================= //
+
+void BM_Counters_kAvgIterationsRate(benchmark::State& state) {
+  for (auto _ : state) {
+    // This test requires a non-zero CPU time to avoid divide-by-zero
+    benchmark::DoNotOptimize(state.iterations());
+  }
+  namespace bm = benchmark;
+  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgIterationsRate};
+  state.counters["bar"] =
+      bm::Counter{2, bm::Counter::kIsRate | bm::Counter::kAvgIterations};
+}
+BENCHMARK(BM_Counters_kAvgIterationsRate);
+ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_kAvgIterationsRate "
+                           "%console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_kAvgIterationsRate\",$"},
+           {"\"family_index\": 11,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_kAvgIterationsRate\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 1,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"bar\": %float,$", MR_Next},
+           {"\"foo\": %float$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_kAvgIterationsRate\",%csv_report,"
+                       "%float,%float$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckAvgIterationsRate(Results const& e) {
+  double its = e.NumIterations();
+  double t = e.DurationCPUTime();  // this (and not real time) is the time used
+  // check that the values are within 0.1% of the expected values
+  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / its / t, 0.001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / its / t, 0.001);
+}
+CHECK_BENCHMARK_RESULTS("BM_Counters_kAvgIterationsRate",
+                        &CheckAvgIterationsRate);
+
+// ========================================================================= //
+// --------------------------- TEST CASES END ------------------------------ //
+// ========================================================================= //
+
+int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/test/user_counters_thousands_test.cc b/3rdparty/benchmark/test/user_counters_thousands_test.cc
new file mode 100644
index 00000000..a42683b3
--- /dev/null
+++ b/3rdparty/benchmark/test/user_counters_thousands_test.cc
@@ -0,0 +1,186 @@
+
+#undef NDEBUG
+
+#include "benchmark/benchmark.h"
+#include "output_test.h"
+
+// ========================================================================= //
+// ------------------------ Thousands Customisation ------------------------ //
+// ========================================================================= //
+
+void BM_Counters_Thousands(benchmark::State& state) {
+  for (auto _ : state) {
+  }
+  namespace bm = benchmark;
+  state.counters.insert({
+      {"t0_1000000DefaultBase",
+       bm::Counter(1000 * 1000, bm::Counter::kDefaults)},
+      {"t1_1000000Base1000", bm::Counter(1000 * 1000, bm::Counter::kDefaults,
+                                         benchmark::Counter::OneK::kIs1000)},
+      {"t2_1000000Base1024", bm::Counter(1000 * 1000, bm::Counter::kDefaults,
+                                         benchmark::Counter::OneK::kIs1024)},
+      {"t3_1048576Base1000", bm::Counter(1024 * 1024, bm::Counter::kDefaults,
+                                         benchmark::Counter::OneK::kIs1000)},
+      {"t4_1048576Base1024", bm::Counter(1024 * 1024, bm::Counter::kDefaults,
+                                         benchmark::Counter::OneK::kIs1024)},
+  });
+}
+BENCHMARK(BM_Counters_Thousands)->Repetitions(2);
+ADD_CASES(
+    TC_ConsoleOut,
+    {
+        {"^BM_Counters_Thousands/repeats:2 %console_report "
+         "t0_1000000DefaultBase=1000k "
+         "t1_1000000Base1000=1000k t2_1000000Base1024=976.56[23]k "
+         "t3_1048576Base1000=1048.58k t4_1048576Base1024=1024k$"},
+        {"^BM_Counters_Thousands/repeats:2 %console_report "
+         "t0_1000000DefaultBase=1000k "
+         "t1_1000000Base1000=1000k t2_1000000Base1024=976.56[23]k "
+         "t3_1048576Base1000=1048.58k t4_1048576Base1024=1024k$"},
+        {"^BM_Counters_Thousands/repeats:2_mean %console_report "
+         "t0_1000000DefaultBase=1000k t1_1000000Base1000=1000k "
+         "t2_1000000Base1024=976.56[23]k t3_1048576Base1000=1048.58k "
+         "t4_1048576Base1024=1024k$"},
+        {"^BM_Counters_Thousands/repeats:2_median %console_report "
+         "t0_1000000DefaultBase=1000k t1_1000000Base1000=1000k "
+         "t2_1000000Base1024=976.56[23]k t3_1048576Base1000=1048.58k "
+         "t4_1048576Base1024=1024k$"},
+        {"^BM_Counters_Thousands/repeats:2_stddev %console_time_only_report [ "
+         "]*2 t0_1000000DefaultBase=0 t1_1000000Base1000=0 "
+         "t2_1000000Base1024=0 t3_1048576Base1000=0 t4_1048576Base1024=0$"},
+    });
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Thousands/repeats:2\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"repetition_index\": 0,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Thousands/repeats:2\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
+           {"\"run_type\": \"iteration\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"repetition_index\": 1,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"iterations\": %int,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Thousands/repeats:2_mean\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"mean\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": 2,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Thousands/repeats:2_median\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"median\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": 2,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
+           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
+           {"}", MR_Next}});
+ADD_CASES(TC_JSONOut,
+          {{"\"name\": \"BM_Counters_Thousands/repeats:2_stddev\",$"},
+           {"\"family_index\": 0,$", MR_Next},
+           {"\"per_family_instance_index\": 0,$", MR_Next},
+           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
+           {"\"run_type\": \"aggregate\",$", MR_Next},
+           {"\"repetitions\": 2,$", MR_Next},
+           {"\"threads\": 1,$", MR_Next},
+           {"\"aggregate_name\": \"stddev\",$", MR_Next},
+           {"\"aggregate_unit\": \"time\",$", MR_Next},
+           {"\"iterations\": 2,$", MR_Next},
+           {"\"real_time\": %float,$", MR_Next},
+           {"\"cpu_time\": %float,$", MR_Next},
+           {"\"time_unit\": \"ns\",$", MR_Next},
+           {"\"t0_1000000DefaultBase\": 0\\.(0)*e\\+(0)*,$", MR_Next},
+           {"\"t1_1000000Base1000\": 0\\.(0)*e\\+(0)*,$", MR_Next},
+           {"\"t2_1000000Base1024\": 0\\.(0)*e\\+(0)*,$", MR_Next},
+           {"\"t3_1048576Base1000\": 0\\.(0)*e\\+(0)*,$", MR_Next},
+           {"\"t4_1048576Base1024\": 0\\.(0)*e\\+(0)*$", MR_Next},
+           {"}", MR_Next}});
+
+ADD_CASES(
+    TC_CSVOut,
+    {{"^\"BM_Counters_Thousands/"
+      "repeats:2\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\.04858e\\+("
+      "0)*6,1\\.04858e\\+(0)*6$"},
+     {"^\"BM_Counters_Thousands/"
+      "repeats:2\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\.04858e\\+("
+      "0)*6,1\\.04858e\\+(0)*6$"},
+     {"^\"BM_Counters_Thousands/"
+      "repeats:2_mean\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\."
+      "04858e\\+(0)*6,1\\.04858e\\+(0)*6$"},
+     {"^\"BM_Counters_Thousands/"
+      "repeats:2_median\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\."
+      "04858e\\+(0)*6,1\\.04858e\\+(0)*6$"},
+     {"^\"BM_Counters_Thousands/repeats:2_stddev\",%csv_report,0,0,0,0,0$"}});
+// VS2013 does not allow this function to be passed as a lambda argument
+// to CHECK_BENCHMARK_RESULTS()
+void CheckThousands(Results const& e) {
+  if (e.name != "BM_Counters_Thousands/repeats:2")
+    return;  // Do not check the aggregates!
+
+  // check that the values are within 0.01% of the expected values
+  CHECK_FLOAT_COUNTER_VALUE(e, "t0_1000000DefaultBase", EQ, 1000 * 1000,
+                            0.0001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "t1_1000000Base1000", EQ, 1000 * 1000, 0.0001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "t2_1000000Base1024", EQ, 1000 * 1000, 0.0001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "t3_1048576Base1000", EQ, 1024 * 1024, 0.0001);
+  CHECK_FLOAT_COUNTER_VALUE(e, "t4_1048576Base1024", EQ, 1024 * 1024, 0.0001);
+}
+CHECK_BENCHMARK_RESULTS("BM_Counters_Thousands", &CheckThousands);
+
+// ========================================================================= //
+// --------------------------- TEST CASES END ------------------------------ //
+// ========================================================================= //
+
+int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/tools/BUILD.bazel b/3rdparty/benchmark/tools/BUILD.bazel
new file mode 100644
index 00000000..5895883a
--- /dev/null
+++ b/3rdparty/benchmark/tools/BUILD.bazel
@@ -0,0 +1,19 @@
+load("@py_deps//:requirements.bzl", "requirement")
+
+py_library(
+    name = "gbench",
+    srcs = glob(["gbench/*.py"]),
+    deps = [
+      requirement("numpy"),
+      requirement("scipy"),
+    ],
+)
+
+py_binary(
+    name = "compare",
+    srcs = ["compare.py"],
+    python_version = "PY2",
+    deps = [
+        ":gbench",
+    ],
+)
diff --git a/3rdparty/benchmark/tools/compare.py b/3rdparty/benchmark/tools/compare.py
new file mode 100644
index 00000000..01d2c89f
--- /dev/null
+++ b/3rdparty/benchmark/tools/compare.py
@@ -0,0 +1,429 @@
+#!/usr/bin/env python
+
+import unittest
+"""
+compare.py - versatile benchmark output compare tool
+"""
+
+import argparse
+from argparse import ArgumentParser
+import json
+import sys
+import gbench
+from gbench import util, report
+from gbench.util import *
+
+
+def check_inputs(in1, in2, flags):
+    """
+    Perform checking on the user provided inputs and diagnose any abnormalities
+    """
+    in1_kind, in1_err = classify_input_file(in1)
+    in2_kind, in2_err = classify_input_file(in2)
+    output_file = find_benchmark_flag('--benchmark_out=', flags)
+    output_type = find_benchmark_flag('--benchmark_out_format=', flags)
+    if in1_kind == IT_Executable and in2_kind == IT_Executable and output_file:
+        print(("WARNING: '--benchmark_out=%s' will be passed to both "
+               "benchmarks causing it to be overwritten") % output_file)
+    if in1_kind == IT_JSON and in2_kind == IT_JSON and len(flags) > 0:
+        print("WARNING: passing optional flags has no effect since both "
+              "inputs are JSON")
+    if output_type is not None and output_type != 'json':
+        print(("ERROR: passing '--benchmark_out_format=%s' to 'compare.py`"
+               " is not supported.") % output_type)
+        sys.exit(1)
+
+
+def create_parser():
+    parser = ArgumentParser(
+        description='versatile benchmark output compare tool')
+
+    parser.add_argument(
+        '-a',
+        '--display_aggregates_only',
+        dest='display_aggregates_only',
+        action="store_true",
+        help="If there are repetitions, by default, we display everything - the"
+             " actual runs, and the aggregates computed. Sometimes, it is "
+             "desirable to only view the aggregates. E.g. when there are a lot "
+             "of repetitions. Do note that only the display is affected. "
+             "Internally, all the actual runs are still used, e.g. for U test.")
+
+    parser.add_argument(
+        '--no-color',
+        dest='color',
+        default=True,
+        action="store_false",
+        help="Do not use colors in the terminal output"
+    )
+
+    parser.add_argument(
+        '-d',
+        '--dump_to_json',
+        dest='dump_to_json',
+        help="Additionally, dump benchmark comparison output to this file in JSON format.")
+
+    utest = parser.add_argument_group()
+    utest.add_argument(
+        '--no-utest',
+        dest='utest',
+        default=True,
+        action="store_false",
+        help="The tool can do a two-tailed Mann-Whitney U test with the null hypothesis that it is equally likely that a randomly selected value from one sample will be less than or greater than a randomly selected value from a second sample.\nWARNING: requires **LARGE** (no less than {}) number of repetitions to be meaningful!\nThe test is being done by default, if at least {} repetitions were done.\nThis option can disable the U Test.".format(report.UTEST_OPTIMAL_REPETITIONS, report.UTEST_MIN_REPETITIONS))
+    alpha_default = 0.05
+    utest.add_argument(
+        "--alpha",
+        dest='utest_alpha',
+        default=alpha_default,
+        type=float,
+        help=("significance level alpha. if the calculated p-value is below this value, then the result is said to be statistically significant and the null hypothesis is rejected.\n(default: %0.4f)") %
+        alpha_default)
+
+    subparsers = parser.add_subparsers(
+        help='This tool has multiple modes of operation:',
+        dest='mode')
+
+    parser_a = subparsers.add_parser(
+        'benchmarks',
+        help='The most simple use-case, compare all the output of these two benchmarks')
+    baseline = parser_a.add_argument_group(
+        'baseline', 'The benchmark baseline')
+    baseline.add_argument(
+        'test_baseline',
+        metavar='test_baseline',
+        type=argparse.FileType('r'),
+        nargs=1,
+        help='A benchmark executable or JSON output file')
+    contender = parser_a.add_argument_group(
+        'contender', 'The benchmark that will be compared against the baseline')
+    contender.add_argument(
+        'test_contender',
+        metavar='test_contender',
+        type=argparse.FileType('r'),
+        nargs=1,
+        help='A benchmark executable or JSON output file')
+    parser_a.add_argument(
+        'benchmark_options',
+        metavar='benchmark_options',
+        nargs=argparse.REMAINDER,
+        help='Arguments to pass when running benchmark executables')
+
+    parser_b = subparsers.add_parser(
+        'filters', help='Compare filter one with the filter two of benchmark')
+    baseline = parser_b.add_argument_group(
+        'baseline', 'The benchmark baseline')
+    baseline.add_argument(
+        'test',
+        metavar='test',
+        type=argparse.FileType('r'),
+        nargs=1,
+        help='A benchmark executable or JSON output file')
+    baseline.add_argument(
+        'filter_baseline',
+        metavar='filter_baseline',
+        type=str,
+        nargs=1,
+        help='The first filter, that will be used as baseline')
+    contender = parser_b.add_argument_group(
+        'contender', 'The benchmark that will be compared against the baseline')
+    contender.add_argument(
+        'filter_contender',
+        metavar='filter_contender',
+        type=str,
+        nargs=1,
+        help='The second filter, that will be compared against the baseline')
+    parser_b.add_argument(
+        'benchmark_options',
+        metavar='benchmark_options',
+        nargs=argparse.REMAINDER,
+        help='Arguments to pass when running benchmark executables')
+
+    parser_c = subparsers.add_parser(
+        'benchmarksfiltered',
+        help='Compare filter one of first benchmark with filter two of the second benchmark')
+    baseline = parser_c.add_argument_group(
+        'baseline', 'The benchmark baseline')
+    baseline.add_argument(
+        'test_baseline',
+        metavar='test_baseline',
+        type=argparse.FileType('r'),
+        nargs=1,
+        help='A benchmark executable or JSON output file')
+    baseline.add_argument(
+        'filter_baseline',
+        metavar='filter_baseline',
+        type=str,
+        nargs=1,
+        help='The first filter, that will be used as baseline')
+    contender = parser_c.add_argument_group(
+        'contender', 'The benchmark that will be compared against the baseline')
+    contender.add_argument(
+        'test_contender',
+        metavar='test_contender',
+        type=argparse.FileType('r'),
+        nargs=1,
+        help='The second benchmark executable or JSON output file, that will be compared against the baseline')
+    contender.add_argument(
+        'filter_contender',
+        metavar='filter_contender',
+        type=str,
+        nargs=1,
+        help='The second filter, that will be compared against the baseline')
+    parser_c.add_argument(
+        'benchmark_options',
+        metavar='benchmark_options',
+        nargs=argparse.REMAINDER,
+        help='Arguments to pass when running benchmark executables')
+
+    return parser
+
+
+def main():
+    # Parse the command line flags
+    parser = create_parser()
+    args, unknown_args = parser.parse_known_args()
+    if args.mode is None:
+        parser.print_help()
+        exit(1)
+    assert not unknown_args
+    benchmark_options = args.benchmark_options
+
+    if args.mode == 'benchmarks':
+        test_baseline = args.test_baseline[0].name
+        test_contender = args.test_contender[0].name
+        filter_baseline = ''
+        filter_contender = ''
+
+        # NOTE: if test_baseline == test_contender, you are analyzing the stdev
+
+        description = 'Comparing %s to %s' % (test_baseline, test_contender)
+    elif args.mode == 'filters':
+        test_baseline = args.test[0].name
+        test_contender = args.test[0].name
+        filter_baseline = args.filter_baseline[0]
+        filter_contender = args.filter_contender[0]
+
+        # NOTE: if filter_baseline == filter_contender, you are analyzing the
+        # stdev
+
+        description = 'Comparing %s to %s (from %s)' % (
+            filter_baseline, filter_contender, args.test[0].name)
+    elif args.mode == 'benchmarksfiltered':
+        test_baseline = args.test_baseline[0].name
+        test_contender = args.test_contender[0].name
+        filter_baseline = args.filter_baseline[0]
+        filter_contender = args.filter_contender[0]
+
+        # NOTE: if test_baseline == test_contender and
+        # filter_baseline == filter_contender, you are analyzing the stdev
+
+        description = 'Comparing %s (from %s) to %s (from %s)' % (
+            filter_baseline, test_baseline, filter_contender, test_contender)
+    else:
+        # should never happen
+        print("Unrecognized mode of operation: '%s'" % args.mode)
+        parser.print_help()
+        exit(1)
+
+    check_inputs(test_baseline, test_contender, benchmark_options)
+
+    if args.display_aggregates_only:
+        benchmark_options += ['--benchmark_display_aggregates_only=true']
+
+    options_baseline = []
+    options_contender = []
+
+    if filter_baseline and filter_contender:
+        options_baseline = ['--benchmark_filter=%s' % filter_baseline]
+        options_contender = ['--benchmark_filter=%s' % filter_contender]
+
+    # Run the benchmarks and report the results
+    json1 = json1_orig = gbench.util.sort_benchmark_results(gbench.util.run_or_load_benchmark(
+        test_baseline, benchmark_options + options_baseline))
+    json2 = json2_orig = gbench.util.sort_benchmark_results(gbench.util.run_or_load_benchmark(
+        test_contender, benchmark_options + options_contender))
+
+    # Now, filter the benchmarks so that the difference report can work
+    if filter_baseline and filter_contender:
+        replacement = '[%s vs. %s]' % (filter_baseline, filter_contender)
+        json1 = gbench.report.filter_benchmark(
+            json1_orig, filter_baseline, replacement)
+        json2 = gbench.report.filter_benchmark(
+            json2_orig, filter_contender, replacement)
+
+    diff_report = gbench.report.get_difference_report(
+        json1, json2, args.utest)
+    output_lines = gbench.report.print_difference_report(
+        diff_report,
+        args.display_aggregates_only,
+        args.utest, args.utest_alpha, args.color)
+    print(description)
+    for ln in output_lines:
+        print(ln)
+
+    # Optionally, diff and output to JSON
+    if args.dump_to_json is not None:
+        with open(args.dump_to_json, 'w') as f_json:
+            json.dump(diff_report, f_json)
+
+class TestParser(unittest.TestCase):
+    def setUp(self):
+        self.parser = create_parser()
+        testInputs = os.path.join(
+            os.path.dirname(
+                os.path.realpath(__file__)),
+            'gbench',
+            'Inputs')
+        self.testInput0 = os.path.join(testInputs, 'test1_run1.json')
+        self.testInput1 = os.path.join(testInputs, 'test1_run2.json')
+
+    def test_benchmarks_basic(self):
+        parsed = self.parser.parse_args(
+            ['benchmarks', self.testInput0, self.testInput1])
+        self.assertFalse(parsed.display_aggregates_only)
+        self.assertTrue(parsed.utest)
+        self.assertEqual(parsed.mode, 'benchmarks')
+        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
+        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
+        self.assertFalse(parsed.benchmark_options)
+
+    def test_benchmarks_basic_without_utest(self):
+        parsed = self.parser.parse_args(
+            ['--no-utest', 'benchmarks', self.testInput0, self.testInput1])
+        self.assertFalse(parsed.display_aggregates_only)
+        self.assertFalse(parsed.utest)
+        self.assertEqual(parsed.utest_alpha, 0.05)
+        self.assertEqual(parsed.mode, 'benchmarks')
+        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
+        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
+        self.assertFalse(parsed.benchmark_options)
+
+    def test_benchmarks_basic_display_aggregates_only(self):
+        parsed = self.parser.parse_args(
+            ['-a', 'benchmarks', self.testInput0, self.testInput1])
+        self.assertTrue(parsed.display_aggregates_only)
+        self.assertTrue(parsed.utest)
+        self.assertEqual(parsed.mode, 'benchmarks')
+        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
+        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
+        self.assertFalse(parsed.benchmark_options)
+
+    def test_benchmarks_basic_with_utest_alpha(self):
+        parsed = self.parser.parse_args(
+            ['--alpha=0.314', 'benchmarks', self.testInput0, self.testInput1])
+        self.assertFalse(parsed.display_aggregates_only)
+        self.assertTrue(parsed.utest)
+        self.assertEqual(parsed.utest_alpha, 0.314)
+        self.assertEqual(parsed.mode, 'benchmarks')
+        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
+        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
+        self.assertFalse(parsed.benchmark_options)
+
+    def test_benchmarks_basic_without_utest_with_utest_alpha(self):
+        parsed = self.parser.parse_args(
+            ['--no-utest', '--alpha=0.314', 'benchmarks', self.testInput0, self.testInput1])
+        self.assertFalse(parsed.display_aggregates_only)
+        self.assertFalse(parsed.utest)
+        self.assertEqual(parsed.utest_alpha, 0.314)
+        self.assertEqual(parsed.mode, 'benchmarks')
+        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
+        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
+        self.assertFalse(parsed.benchmark_options)
+
+    def test_benchmarks_with_remainder(self):
+        parsed = self.parser.parse_args(
+            ['benchmarks', self.testInput0, self.testInput1, 'd'])
+        self.assertFalse(parsed.display_aggregates_only)
+        self.assertTrue(parsed.utest)
+        self.assertEqual(parsed.mode, 'benchmarks')
+        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
+        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
+        self.assertEqual(parsed.benchmark_options, ['d'])
+
+    def test_benchmarks_with_remainder_after_doubleminus(self):
+        parsed = self.parser.parse_args(
+            ['benchmarks', self.testInput0, self.testInput1, '--', 'e'])
+        self.assertFalse(parsed.display_aggregates_only)
+        self.assertTrue(parsed.utest)
+        self.assertEqual(parsed.mode, 'benchmarks')
+        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
+        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
+        self.assertEqual(parsed.benchmark_options, ['e'])
+
+    def test_filters_basic(self):
+        parsed = self.parser.parse_args(
+            ['filters', self.testInput0, 'c', 'd'])
+        self.assertFalse(parsed.display_aggregates_only)
+        self.assertTrue(parsed.utest)
+        self.assertEqual(parsed.mode, 'filters')
+        self.assertEqual(parsed.test[0].name, self.testInput0)
+        self.assertEqual(parsed.filter_baseline[0], 'c')
+        self.assertEqual(parsed.filter_contender[0], 'd')
+        self.assertFalse(parsed.benchmark_options)
+
+    def test_filters_with_remainder(self):
+        parsed = self.parser.parse_args(
+            ['filters', self.testInput0, 'c', 'd', 'e'])
+        self.assertFalse(parsed.display_aggregates_only)
+        self.assertTrue(parsed.utest)
+        self.assertEqual(parsed.mode, 'filters')
+        self.assertEqual(parsed.test[0].name, self.testInput0)
+        self.assertEqual(parsed.filter_baseline[0], 'c')
+        self.assertEqual(parsed.filter_contender[0], 'd')
+        self.assertEqual(parsed.benchmark_options, ['e'])
+
+    def test_filters_with_remainder_after_doubleminus(self):
+        parsed = self.parser.parse_args(
+            ['filters', self.testInput0, 'c', 'd', '--', 'f'])
+        self.assertFalse(parsed.display_aggregates_only)
+        self.assertTrue(parsed.utest)
+        self.assertEqual(parsed.mode, 'filters')
+        self.assertEqual(parsed.test[0].name, self.testInput0)
+        self.assertEqual(parsed.filter_baseline[0], 'c')
+        self.assertEqual(parsed.filter_contender[0], 'd')
+        self.assertEqual(parsed.benchmark_options, ['f'])
+
+    def test_benchmarksfiltered_basic(self):
+        parsed = self.parser.parse_args(
+            ['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e'])
+        self.assertFalse(parsed.display_aggregates_only)
+        self.assertTrue(parsed.utest)
+        self.assertEqual(parsed.mode, 'benchmarksfiltered')
+        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
+        self.assertEqual(parsed.filter_baseline[0], 'c')
+        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
+        self.assertEqual(parsed.filter_contender[0], 'e')
+        self.assertFalse(parsed.benchmark_options)
+
+    def test_benchmarksfiltered_with_remainder(self):
+        parsed = self.parser.parse_args(
+            ['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e', 'f'])
+        self.assertFalse(parsed.display_aggregates_only)
+        self.assertTrue(parsed.utest)
+        self.assertEqual(parsed.mode, 'benchmarksfiltered')
+        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
+        self.assertEqual(parsed.filter_baseline[0], 'c')
+        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
+        self.assertEqual(parsed.filter_contender[0], 'e')
+        self.assertEqual(parsed.benchmark_options[0], 'f')
+
+    def test_benchmarksfiltered_with_remainder_after_doubleminus(self):
+        parsed = self.parser.parse_args(
+            ['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e', '--', 'g'])
+        self.assertFalse(parsed.display_aggregates_only)
+        self.assertTrue(parsed.utest)
+        self.assertEqual(parsed.mode, 'benchmarksfiltered')
+        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
+        self.assertEqual(parsed.filter_baseline[0], 'c')
+        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
+        self.assertEqual(parsed.filter_contender[0], 'e')
+        self.assertEqual(parsed.benchmark_options[0], 'g')
+
+
+if __name__ == '__main__':
+    # unittest.main()
+    main()
+
+# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
+# kate: tab-width: 4; replace-tabs on; indent-width 4; tab-indents: off;
+# kate: indent-mode python; remove-trailing-spaces modified;
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test1_run1.json b/3rdparty/benchmark/tools/gbench/Inputs/test1_run1.json
new file mode 100644
index 00000000..601e327a
--- /dev/null
+++ b/3rdparty/benchmark/tools/gbench/Inputs/test1_run1.json
@@ -0,0 +1,119 @@
+{
+  "context": {
+    "date": "2016-08-02 17:44:46",
+    "num_cpus": 4,
+    "mhz_per_cpu": 4228,
+    "cpu_scaling_enabled": false,
+    "library_build_type": "release"
+  },
+  "benchmarks": [
+    {
+      "name": "BM_SameTimes",
+      "iterations": 1000,
+      "real_time": 10,
+      "cpu_time": 10,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_2xFaster",
+      "iterations": 1000,
+      "real_time": 50,
+      "cpu_time": 50,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_2xSlower",
+      "iterations": 1000,
+      "real_time": 50,
+      "cpu_time": 50,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_1PercentFaster",
+      "iterations": 1000,
+      "real_time": 100,
+      "cpu_time": 100,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_1PercentSlower",
+      "iterations": 1000,
+      "real_time": 100,
+      "cpu_time": 100,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_10PercentFaster",
+      "iterations": 1000,
+      "real_time": 100,
+      "cpu_time": 100,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_10PercentSlower",
+      "iterations": 1000,
+      "real_time": 100,
+      "cpu_time": 100,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_100xSlower",
+      "iterations": 1000,
+      "real_time": 100,
+      "cpu_time": 100,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_100xFaster",
+      "iterations": 1000,
+      "real_time": 10000,
+      "cpu_time": 10000,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_10PercentCPUToTime",
+      "iterations": 1000,
+      "real_time": 100,
+      "cpu_time": 100,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_ThirdFaster",
+      "iterations": 1000,
+      "real_time": 100,
+      "cpu_time": 100,
+      "time_unit": "ns"
+    },
+    {
+      "name": "MyComplexityTest_BigO",
+      "run_name": "MyComplexityTest",
+      "run_type": "aggregate",
+      "aggregate_name": "BigO",
+      "cpu_coefficient": 4.2749856294592886e+00,
+      "real_coefficient": 6.4789275289789780e+00,
+      "big_o": "N",
+      "time_unit": "ns"
+    },
+    {
+      "name": "MyComplexityTest_RMS",
+      "run_name": "MyComplexityTest",
+      "run_type": "aggregate",
+      "aggregate_name": "RMS",
+      "rms": 4.5097802512472874e-03
+    },
+    {
+      "name": "BM_NotBadTimeUnit",
+      "iterations": 1000,
+      "real_time": 0.4,
+      "cpu_time": 0.5,
+      "time_unit": "s"
+    },
+    {
+      "name": "BM_DifferentTimeUnit",
+      "iterations": 1,
+      "real_time": 1,
+      "cpu_time": 1,
+      "time_unit": "s"
+    }
+  ]
+}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test1_run2.json b/3rdparty/benchmark/tools/gbench/Inputs/test1_run2.json
new file mode 100644
index 00000000..3cbcf39b
--- /dev/null
+++ b/3rdparty/benchmark/tools/gbench/Inputs/test1_run2.json
@@ -0,0 +1,119 @@
+{
+  "context": {
+    "date": "2016-08-02 17:44:46",
+    "num_cpus": 4,
+    "mhz_per_cpu": 4228,
+    "cpu_scaling_enabled": false,
+    "library_build_type": "release"
+  },
+  "benchmarks": [
+    {
+      "name": "BM_SameTimes",
+      "iterations": 1000,
+      "real_time": 10,
+      "cpu_time": 10,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_2xFaster",
+      "iterations": 1000,
+      "real_time": 25,
+      "cpu_time": 25,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_2xSlower",
+      "iterations": 20833333,
+      "real_time": 100,
+      "cpu_time": 100,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_1PercentFaster",
+      "iterations": 1000,
+      "real_time": 98.9999999,
+      "cpu_time": 98.9999999,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_1PercentSlower",
+      "iterations": 1000,
+      "real_time": 100.9999999,
+      "cpu_time": 100.9999999,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_10PercentFaster",
+      "iterations": 1000,
+      "real_time": 90,
+      "cpu_time": 90,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_10PercentSlower",
+      "iterations": 1000,
+      "real_time": 110,
+      "cpu_time": 110,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_100xSlower",
+      "iterations": 1000,
+      "real_time": 1.0000e+04,
+      "cpu_time": 1.0000e+04,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_100xFaster",
+      "iterations": 1000,
+      "real_time": 100,
+      "cpu_time": 100,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_10PercentCPUToTime",
+      "iterations": 1000,
+      "real_time": 110,
+      "cpu_time": 90,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_ThirdFaster",
+      "iterations": 1000,
+      "real_time": 66.665,
+      "cpu_time": 66.664,
+      "time_unit": "ns"
+    },
+    {
+      "name": "MyComplexityTest_BigO",
+      "run_name": "MyComplexityTest",
+      "run_type": "aggregate",
+      "aggregate_name": "BigO",
+      "cpu_coefficient": 5.6215779594361486e+00,
+      "real_coefficient": 5.6288314793554610e+00,
+      "big_o": "N",
+      "time_unit": "ns"
+    },
+    {
+      "name": "MyComplexityTest_RMS",
+      "run_name": "MyComplexityTest",
+      "run_type": "aggregate",
+      "aggregate_name": "RMS",
+      "rms": 3.3128901852342174e-03
+    },
+    {
+      "name": "BM_NotBadTimeUnit",
+      "iterations": 1000,
+      "real_time": 0.04,
+      "cpu_time": 0.6,
+      "time_unit": "s"
+    },
+    {
+      "name": "BM_DifferentTimeUnit",
+      "iterations": 1,
+      "real_time": 1,
+      "cpu_time": 1,
+      "time_unit": "ns"
+    }
+  ]
+}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test2_run.json b/3rdparty/benchmark/tools/gbench/Inputs/test2_run.json
new file mode 100644
index 00000000..15bc6980
--- /dev/null
+++ b/3rdparty/benchmark/tools/gbench/Inputs/test2_run.json
@@ -0,0 +1,81 @@
+{
+  "context": {
+    "date": "2016-08-02 17:44:46",
+    "num_cpus": 4,
+    "mhz_per_cpu": 4228,
+    "cpu_scaling_enabled": false,
+    "library_build_type": "release"
+  },
+  "benchmarks": [
+    {
+      "name": "BM_Hi",
+      "iterations": 1234,
+      "real_time": 42,
+      "cpu_time": 24,
+      "time_unit": "ms"
+    },
+    {
+      "name": "BM_Zero",
+      "iterations": 1000,
+      "real_time": 10,
+      "cpu_time": 10,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_Zero/4",
+      "iterations": 4000,
+      "real_time": 40,
+      "cpu_time": 40,
+      "time_unit": "ns"
+    },
+    {
+      "name": "Prefix/BM_Zero",
+      "iterations": 2000,
+      "real_time": 20,
+      "cpu_time": 20,
+      "time_unit": "ns"
+    },
+    {
+      "name": "Prefix/BM_Zero/3",
+      "iterations": 3000,
+      "real_time": 30,
+      "cpu_time": 30,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_One",
+      "iterations": 5000,
+      "real_time": 5,
+      "cpu_time": 5,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_One/4",
+      "iterations": 2000,
+      "real_time": 20,
+      "cpu_time": 20,
+      "time_unit": "ns"
+    },
+    {
+      "name": "Prefix/BM_One",
+      "iterations": 1000,
+      "real_time": 10,
+      "cpu_time": 10,
+      "time_unit": "ns"
+    },
+    {
+      "name": "Prefix/BM_One/3",
+      "iterations": 1500,
+      "real_time": 15,
+      "cpu_time": 15,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_Bye",
+      "iterations": 5321,
+      "real_time": 11,
+      "cpu_time": 63,
+      "time_unit": "ns"
+    }
+  ]
+}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test3_run0.json b/3rdparty/benchmark/tools/gbench/Inputs/test3_run0.json
new file mode 100644
index 00000000..49f8b061
--- /dev/null
+++ b/3rdparty/benchmark/tools/gbench/Inputs/test3_run0.json
@@ -0,0 +1,65 @@
+{
+  "context": {
+    "date": "2016-08-02 17:44:46",
+    "num_cpus": 4,
+    "mhz_per_cpu": 4228,
+    "cpu_scaling_enabled": false,
+    "library_build_type": "release"
+  },
+  "benchmarks": [
+    {
+      "name": "BM_One",
+      "run_type": "aggregate",
+      "iterations": 1000,
+      "real_time": 10,
+      "cpu_time": 100,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_Two",
+      "iterations": 1000,
+      "real_time": 9,
+      "cpu_time": 90,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_Two",
+      "iterations": 1000,
+      "real_time": 8,
+      "cpu_time": 86,
+      "time_unit": "ns"
+    },
+    {
+      "name": "short",
+      "run_type": "aggregate",
+      "iterations": 1000,
+      "real_time": 8,
+      "cpu_time": 80,
+      "time_unit": "ns"
+    },
+    {
+      "name": "short",
+      "run_type": "aggregate",
+      "iterations": 1000,
+      "real_time": 8,
+      "cpu_time": 77,
+      "time_unit": "ns"
+    },
+    {
+      "name": "medium",
+      "run_type": "iteration",
+      "iterations": 1000,
+      "real_time": 8,
+      "cpu_time": 80,
+      "time_unit": "ns"
+    },
+    {
+      "name": "medium",
+      "run_type": "iteration",
+      "iterations": 1000,
+      "real_time": 9,
+      "cpu_time": 82,
+      "time_unit": "ns"
+    }
+  ]
+}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test3_run1.json b/3rdparty/benchmark/tools/gbench/Inputs/test3_run1.json
new file mode 100644
index 00000000..acc5ba17
--- /dev/null
+++ b/3rdparty/benchmark/tools/gbench/Inputs/test3_run1.json
@@ -0,0 +1,65 @@
+{
+  "context": {
+    "date": "2016-08-02 17:44:46",
+    "num_cpus": 4,
+    "mhz_per_cpu": 4228,
+    "cpu_scaling_enabled": false,
+    "library_build_type": "release"
+  },
+  "benchmarks": [
+    {
+      "name": "BM_One",
+      "iterations": 1000,
+      "real_time": 9,
+      "cpu_time": 110,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_Two",
+      "run_type": "aggregate",
+      "iterations": 1000,
+      "real_time": 10,
+      "cpu_time": 89,
+      "time_unit": "ns"
+    },
+    {
+      "name": "BM_Two",
+      "iterations": 1000,
+      "real_time": 7,
+      "cpu_time": 72,
+      "time_unit": "ns"
+    },
+    {
+      "name": "short",
+      "run_type": "aggregate",
+      "iterations": 1000,
+      "real_time": 7,
+      "cpu_time": 75,
+      "time_unit": "ns"
+    },
+    {
+      "name": "short",
+      "run_type": "aggregate",
+      "iterations": 762,
+      "real_time": 4.54,
+      "cpu_time": 66.6,
+      "time_unit": "ns"
+    },
+    {
+      "name": "short",
+      "run_type": "iteration",
+      "iterations": 1000,
+      "real_time": 800,
+      "cpu_time": 1,
+      "time_unit": "ns"
+    },
+    {
+      "name": "medium",
+      "run_type": "iteration",
+      "iterations": 1200,
+      "real_time": 5,
+      "cpu_time": 53,
+      "time_unit": "ns"
+    }
+  ]
+}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test4_run.json b/3rdparty/benchmark/tools/gbench/Inputs/test4_run.json
new file mode 100644
index 00000000..eaa005f3
--- /dev/null
+++ b/3rdparty/benchmark/tools/gbench/Inputs/test4_run.json
@@ -0,0 +1,96 @@
+{
+  "benchmarks": [
+    {
+      "name": "99 family 0 instance 0 repetition 0",
+      "run_type": "iteration",
+      "family_index": 0,
+      "per_family_instance_index": 0,
+      "repetition_index": 0
+    },
+    {
+      "name": "98 family 0 instance 0 repetition 1",
+      "run_type": "iteration",
+      "family_index": 0,
+      "per_family_instance_index": 0,
+      "repetition_index": 1
+    },
+    {
+      "name": "97 family 0 instance 0 aggregate",
+      "run_type": "aggregate",
+      "family_index": 0,
+      "per_family_instance_index": 0,
+      "aggregate_name": "9 aggregate"
+    },
+
+
+    {
+      "name": "96 family 0 instance 1 repetition 0",
+      "run_type": "iteration",
+      "family_index": 0,
+      "per_family_instance_index": 1,
+      "repetition_index": 0
+    },
+    {
+      "name": "95 family 0 instance 1 repetition 1",
+      "run_type": "iteration",
+      "family_index": 0,
+      "per_family_instance_index": 1,
+      "repetition_index": 1
+    },
+    {
+      "name": "94 family 0 instance 1 aggregate",
+      "run_type": "aggregate",
+      "family_index": 0,
+      "per_family_instance_index": 1,
+      "aggregate_name": "9 aggregate"
+    },
+
+
+
+
+    {
+      "name": "93 family 1 instance 0 repetition 0",
+      "run_type": "iteration",
+      "family_index": 1,
+      "per_family_instance_index": 0,
+      "repetition_index": 0
+    },
+    {
+      "name": "92 family 1 instance 0 repetition 1",
+      "run_type": "iteration",
+      "family_index": 1,
+      "per_family_instance_index": 0,
+      "repetition_index": 1
+    },
+    {
+      "name": "91 family 1 instance 0 aggregate",
+      "run_type": "aggregate",
+      "family_index": 1,
+      "per_family_instance_index": 0,
+      "aggregate_name": "9 aggregate"
+    },
+
+
+    {
+      "name": "90 family 1 instance 1 repetition 0",
+      "run_type": "iteration",
+      "family_index": 1,
+      "per_family_instance_index": 1,
+      "repetition_index": 0
+    },
+    {
+      "name": "89 family 1 instance 1 repetition 1",
+      "run_type": "iteration",
+      "family_index": 1,
+      "per_family_instance_index": 1,
+      "repetition_index": 1
+    },
+    {
+      "name": "88 family 1 instance 1 aggregate",
+      "run_type": "aggregate",
+      "family_index": 1,
+      "per_family_instance_index": 1,
+      "aggregate_name": "9 aggregate"
+    }
+  ]
+}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test4_run0.json b/3rdparty/benchmark/tools/gbench/Inputs/test4_run0.json
new file mode 100644
index 00000000..54cf1275
--- /dev/null
+++ b/3rdparty/benchmark/tools/gbench/Inputs/test4_run0.json
@@ -0,0 +1,21 @@
+{
+  "context": {
+    "date": "2016-08-02 17:44:46",
+    "num_cpus": 4,
+    "mhz_per_cpu": 4228,
+    "cpu_scaling_enabled": false,
+    "library_build_type": "release"
+  },
+  "benchmarks": [
+    {
+      "name": "whocares",
+      "run_type": "aggregate",
+      "aggregate_name": "zz",
+      "aggregate_unit": "percentage",
+      "iterations": 1000,
+      "real_time": 0.01,
+      "cpu_time": 0.10,
+      "time_unit": "ns"
+    }
+  ]
+}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test4_run1.json b/3rdparty/benchmark/tools/gbench/Inputs/test4_run1.json
new file mode 100644
index 00000000..25d56050
--- /dev/null
+++ b/3rdparty/benchmark/tools/gbench/Inputs/test4_run1.json
@@ -0,0 +1,21 @@
+{
+  "context": {
+    "date": "2016-08-02 17:44:46",
+    "num_cpus": 4,
+    "mhz_per_cpu": 4228,
+    "cpu_scaling_enabled": false,
+    "library_build_type": "release"
+  },
+  "benchmarks": [
+    {
+      "name": "whocares",
+      "run_type": "aggregate",
+      "aggregate_name": "zz",
+      "aggregate_unit": "percentage",
+      "iterations": 1000,
+      "real_time": 0.005,
+      "cpu_time": 0.15,
+      "time_unit": "ns"
+    }
+  ]
+}
diff --git a/3rdparty/benchmark/tools/gbench/__init__.py b/3rdparty/benchmark/tools/gbench/__init__.py
new file mode 100644
index 00000000..fce1a1ac
--- /dev/null
+++ b/3rdparty/benchmark/tools/gbench/__init__.py
@@ -0,0 +1,8 @@
+"""Google Benchmark tooling"""
+
+__author__ = 'Eric Fiselier'
+__email__ = 'eric@efcs.ca'
+__versioninfo__ = (0, 5, 0)
+__version__ = '.'.join(str(v) for v in __versioninfo__) + 'dev'
+
+__all__ = []
diff --git a/3rdparty/benchmark/tools/gbench/report.py b/3rdparty/benchmark/tools/gbench/report.py
new file mode 100644
index 00000000..4c798baf
--- /dev/null
+++ b/3rdparty/benchmark/tools/gbench/report.py
@@ -0,0 +1,1144 @@
+"""report.py - Utilities for reporting statistics about benchmark results
+"""
+
+import unittest
+import os
+import re
+import copy
+import random
+
+from scipy.stats import mannwhitneyu, gmean
+from numpy import array
+from pandas import Timedelta
+
+
+class BenchmarkColor(object):
+    def __init__(self, name, code):
+        self.name = name
+        self.code = code
+
+    def __repr__(self):
+        return '%s%r' % (self.__class__.__name__,
+                         (self.name, self.code))
+
+    def __format__(self, format):
+        return self.code
+
+
+# Benchmark Colors Enumeration
+BC_NONE = BenchmarkColor('NONE', '')
+BC_MAGENTA = BenchmarkColor('MAGENTA', '\033[95m')
+BC_CYAN = BenchmarkColor('CYAN', '\033[96m')
+BC_OKBLUE = BenchmarkColor('OKBLUE', '\033[94m')
+BC_OKGREEN = BenchmarkColor('OKGREEN', '\033[32m')
+BC_HEADER = BenchmarkColor('HEADER', '\033[92m')
+BC_WARNING = BenchmarkColor('WARNING', '\033[93m')
+BC_WHITE = BenchmarkColor('WHITE', '\033[97m')
+BC_FAIL = BenchmarkColor('FAIL', '\033[91m')
+BC_ENDC = BenchmarkColor('ENDC', '\033[0m')
+BC_BOLD = BenchmarkColor('BOLD', '\033[1m')
+BC_UNDERLINE = BenchmarkColor('UNDERLINE', '\033[4m')
+
+UTEST_MIN_REPETITIONS = 2
+UTEST_OPTIMAL_REPETITIONS = 9  # Lowest reasonable number, More is better.
+UTEST_COL_NAME = "_pvalue"
+
+
+def color_format(use_color, fmt_str, *args, **kwargs):
+    """
+    Return the result of 'fmt_str.format(*args, **kwargs)' after transforming
+    'args' and 'kwargs' according to the value of 'use_color'. If 'use_color'
+    is False then all color codes in 'args' and 'kwargs' are replaced with
+    the empty string.
+    """
+    assert use_color is True or use_color is False
+    if not use_color:
+        args = [arg if not isinstance(arg, BenchmarkColor) else BC_NONE
+                for arg in args]
+        kwargs = {key: arg if not isinstance(arg, BenchmarkColor) else BC_NONE
+                  for key, arg in kwargs.items()}
+    return fmt_str.format(*args, **kwargs)
+
+
+def find_longest_name(benchmark_list):
+    """
+    Return the length of the longest benchmark name in a given list of
+    benchmark JSON objects
+    """
+    longest_name = 1
+    for bc in benchmark_list:
+        if len(bc['name']) > longest_name:
+            longest_name = len(bc['name'])
+    return longest_name
+
+
+def calculate_change(old_val, new_val):
+    """
+    Return a float representing the decimal change between old_val and new_val.
+    """
+    if old_val == 0 and new_val == 0:
+        return 0.0
+    if old_val == 0:
+        return float(new_val - old_val) / (float(old_val + new_val) / 2)
+    return float(new_val - old_val) / abs(old_val)
+
+
+def filter_benchmark(json_orig, family, replacement=""):
+    """
+    Apply a filter to the json, and only leave the 'family' of benchmarks.
+    """
+    regex = re.compile(family)
+    filtered = {}
+    filtered['benchmarks'] = []
+    for be in json_orig['benchmarks']:
+        if not regex.search(be['name']):
+            continue
+        filteredbench = copy.deepcopy(be)  # Do NOT modify the old name!
+        filteredbench['name'] = regex.sub(replacement, filteredbench['name'])
+        filtered['benchmarks'].append(filteredbench)
+    return filtered
+
+
+def get_unique_benchmark_names(json):
+    """
+    While *keeping* the order, give all the unique 'names' used for benchmarks.
+    """
+    seen = set()
+    uniqued = [x['name'] for x in json['benchmarks']
+               if x['name'] not in seen and
+               (seen.add(x['name']) or True)]
+    return uniqued
+
+
+def intersect(list1, list2):
+    """
+    Given two lists, get a new list consisting of the elements only contained
+    in *both of the input lists*, while preserving the ordering.
+    """
+    return [x for x in list1 if x in list2]
+
+
+def is_potentially_comparable_benchmark(x):
+    return ('time_unit' in x and 'real_time' in x and 'cpu_time' in x)
+
+
+def partition_benchmarks(json1, json2):
+    """
+    While preserving the ordering, find benchmarks with the same names in
+    both of the inputs, and group them.
+    (i.e. partition/filter into groups with common name)
+    """
+    json1_unique_names = get_unique_benchmark_names(json1)
+    json2_unique_names = get_unique_benchmark_names(json2)
+    names = intersect(json1_unique_names, json2_unique_names)
+    partitions = []
+    for name in names:
+        time_unit = None
+        # Pick the time unit from the first entry of the lhs benchmark.
+        # We should be careful not to crash with unexpected input.
+        for x in json1['benchmarks']:
+            if (x['name'] == name and is_potentially_comparable_benchmark(x)):
+                time_unit = x['time_unit']
+                break
+        if time_unit is None:
+            continue
+        # Filter by name and time unit.
+        # All the repetitions are assumed to be comparable.
+        lhs = [x for x in json1['benchmarks'] if x['name'] == name and
+               x['time_unit'] == time_unit]
+        rhs = [x for x in json2['benchmarks'] if x['name'] == name and
+               x['time_unit'] == time_unit]
+        partitions.append([lhs, rhs])
+    return partitions
+
+
+def get_timedelta_field_as_seconds(benchmark, field_name):
+    """
+    Get value of field_name field of benchmark, which is time with time unit
+    time_unit, as time in seconds.
+    """
+    time_unit = benchmark['time_unit'] if 'time_unit' in benchmark else 's'
+    dt = Timedelta(benchmark[field_name], time_unit)
+    return dt / Timedelta(1, 's')
+
+
+def calculate_geomean(json):
+    """
+    Extract all real/cpu times from all the benchmarks as seconds,
+    and calculate their geomean.
+    """
+    times = []
+    for benchmark in json['benchmarks']:
+        if 'run_type' in benchmark and benchmark['run_type'] == 'aggregate':
+            continue
+        times.append([get_timedelta_field_as_seconds(benchmark, 'real_time'),
+                      get_timedelta_field_as_seconds(benchmark, 'cpu_time')])
+    return gmean(times) if times else array([])
+
+
+def extract_field(partition, field_name):
+    # The count of elements may be different. We want *all* of them.
+    lhs = [x[field_name] for x in partition[0]]
+    rhs = [x[field_name] for x in partition[1]]
+    return [lhs, rhs]
+
+
+def calc_utest(timings_cpu, timings_time):
+    min_rep_cnt = min(len(timings_time[0]),
+                      len(timings_time[1]),
+                      len(timings_cpu[0]),
+                      len(timings_cpu[1]))
+
+    # Does *everything* has at least UTEST_MIN_REPETITIONS repetitions?
+    if min_rep_cnt < UTEST_MIN_REPETITIONS:
+        return False, None, None
+
+    time_pvalue = mannwhitneyu(
+        timings_time[0], timings_time[1], alternative='two-sided').pvalue
+    cpu_pvalue = mannwhitneyu(
+        timings_cpu[0], timings_cpu[1], alternative='two-sided').pvalue
+
+    return (min_rep_cnt >= UTEST_OPTIMAL_REPETITIONS), cpu_pvalue, time_pvalue
+
+
+def print_utest(bc_name, utest, utest_alpha, first_col_width, use_color=True):
+    def get_utest_color(pval):
+        return BC_FAIL if pval >= utest_alpha else BC_OKGREEN
+
+    # Check if we failed miserably with minimum required repetitions for utest
+    if not utest['have_optimal_repetitions'] and utest['cpu_pvalue'] is None and utest['time_pvalue'] is None:
+        return []
+
+    dsc = "U Test, Repetitions: {} vs {}".format(
+        utest['nr_of_repetitions'], utest['nr_of_repetitions_other'])
+    dsc_color = BC_OKGREEN
+
+    # We still got some results to show but issue a warning about it.
+    if not utest['have_optimal_repetitions']:
+        dsc_color = BC_WARNING
+        dsc += ". WARNING: Results unreliable! {}+ repetitions recommended.".format(
+            UTEST_OPTIMAL_REPETITIONS)
+
+    special_str = "{}{:<{}s}{endc}{}{:16.4f}{endc}{}{:16.4f}{endc}{}      {}"
+
+    return [color_format(use_color,
+                         special_str,
+                         BC_HEADER,
+                         "{}{}".format(bc_name, UTEST_COL_NAME),
+                         first_col_width,
+                         get_utest_color(
+                             utest['time_pvalue']), utest['time_pvalue'],
+                         get_utest_color(
+                             utest['cpu_pvalue']), utest['cpu_pvalue'],
+                         dsc_color, dsc,
+                         endc=BC_ENDC)]
+
+
+def get_difference_report(
+        json1,
+        json2,
+        utest=False):
+    """
+    Calculate and report the difference between each test of two benchmarks
+    runs specified as 'json1' and 'json2'. Output is another json containing
+    relevant details for each test run.
+    """
+    assert utest is True or utest is False
+
+    diff_report = []
+    partitions = partition_benchmarks(json1, json2)
+    for partition in partitions:
+        benchmark_name = partition[0][0]['name']
+        time_unit = partition[0][0]['time_unit']
+        measurements = []
+        utest_results = {}
+        # Careful, we may have different repetition count.
+        for i in range(min(len(partition[0]), len(partition[1]))):
+            bn = partition[0][i]
+            other_bench = partition[1][i]
+            measurements.append({
+                'real_time': bn['real_time'],
+                'cpu_time': bn['cpu_time'],
+                'real_time_other': other_bench['real_time'],
+                'cpu_time_other': other_bench['cpu_time'],
+                'time': calculate_change(bn['real_time'], other_bench['real_time']),
+                'cpu': calculate_change(bn['cpu_time'], other_bench['cpu_time'])
+            })
+
+        # After processing the whole partition, if requested, do the U test.
+        if utest:
+            timings_cpu = extract_field(partition, 'cpu_time')
+            timings_time = extract_field(partition, 'real_time')
+            have_optimal_repetitions, cpu_pvalue, time_pvalue = calc_utest(
+                timings_cpu, timings_time)
+            if cpu_pvalue and time_pvalue:
+                utest_results = {
+                    'have_optimal_repetitions': have_optimal_repetitions,
+                    'cpu_pvalue': cpu_pvalue,
+                    'time_pvalue': time_pvalue,
+                    'nr_of_repetitions': len(timings_cpu[0]),
+                    'nr_of_repetitions_other': len(timings_cpu[1])
+                }
+
+        # Store only if we had any measurements for given benchmark.
+        # E.g. partition_benchmarks will filter out the benchmarks having
+        # time units which are not compatible with other time units in the
+        # benchmark suite.
+        if measurements:
+            run_type = partition[0][0]['run_type'] if 'run_type' in partition[0][0] else ''
+            aggregate_name = partition[0][0]['aggregate_name'] if run_type == 'aggregate' and 'aggregate_name' in partition[0][0] else ''
+            diff_report.append({
+                'name': benchmark_name,
+                'measurements': measurements,
+                'time_unit': time_unit,
+                'run_type': run_type,
+                'aggregate_name': aggregate_name,
+                'utest': utest_results
+            })
+
+    lhs_gmean = calculate_geomean(json1)
+    rhs_gmean = calculate_geomean(json2)
+    if lhs_gmean.any() and rhs_gmean.any():
+        diff_report.append({
+            'name': 'OVERALL_GEOMEAN',
+            'measurements': [{
+                'real_time': lhs_gmean[0],
+                'cpu_time': lhs_gmean[1],
+                'real_time_other': rhs_gmean[0],
+                'cpu_time_other': rhs_gmean[1],
+                'time': calculate_change(lhs_gmean[0], rhs_gmean[0]),
+                'cpu': calculate_change(lhs_gmean[1], rhs_gmean[1])
+            }],
+            'time_unit': 's',
+            'run_type': 'aggregate',
+            'aggregate_name': 'geomean',
+            'utest': {}
+        })
+
+    return diff_report
+
+
+def print_difference_report(
+        json_diff_report,
+        include_aggregates_only=False,
+        utest=False,
+        utest_alpha=0.05,
+        use_color=True):
+    """
+    Calculate and report the difference between each test of two benchmarks
+    runs specified as 'json1' and 'json2'.
+    """
+    assert utest is True or utest is False
+
+    def get_color(res):
+        if res > 0.05:
+            return BC_FAIL
+        elif res > -0.07:
+            return BC_WHITE
+        else:
+            return BC_CYAN
+
+    first_col_width = find_longest_name(json_diff_report)
+    first_col_width = max(
+        first_col_width,
+        len('Benchmark'))
+    first_col_width += len(UTEST_COL_NAME)
+    first_line = "{:<{}s}Time             CPU      Time Old      Time New       CPU Old       CPU New".format(
+        'Benchmark', 12 + first_col_width)
+    output_strs = [first_line, '-' * len(first_line)]
+
+    fmt_str = "{}{:<{}s}{endc}{}{:+16.4f}{endc}{}{:+16.4f}{endc}{:14.0f}{:14.0f}{endc}{:14.0f}{:14.0f}"
+    for benchmark in json_diff_report:
+        # *If* we were asked to only include aggregates,
+        # and if it is non-aggregate, then don't print it.
+        if not include_aggregates_only or not 'run_type' in benchmark or benchmark['run_type'] == 'aggregate':
+            for measurement in benchmark['measurements']:
+                output_strs += [color_format(use_color,
+                                             fmt_str,
+                                             BC_HEADER,
+                                             benchmark['name'],
+                                             first_col_width,
+                                             get_color(measurement['time']),
+                                             measurement['time'],
+                                             get_color(measurement['cpu']),
+                                             measurement['cpu'],
+                                             measurement['real_time'],
+                                             measurement['real_time_other'],
+                                             measurement['cpu_time'],
+                                             measurement['cpu_time_other'],
+                                             endc=BC_ENDC)]
+
+        # After processing the measurements, if requested and
+        # if applicable (e.g. u-test exists for given benchmark),
+        # print the U test.
+        if utest and benchmark['utest']:
+            output_strs += print_utest(benchmark['name'],
+                                       benchmark['utest'],
+                                       utest_alpha=utest_alpha,
+                                       first_col_width=first_col_width,
+                                       use_color=use_color)
+
+    return output_strs
+
+
+###############################################################################
+# Unit tests
+
+
+class TestGetUniqueBenchmarkNames(unittest.TestCase):
+    def load_results(self):
+        import json
+        testInputs = os.path.join(
+            os.path.dirname(
+                os.path.realpath(__file__)),
+            'Inputs')
+        testOutput = os.path.join(testInputs, 'test3_run0.json')
+        with open(testOutput, 'r') as f:
+            json = json.load(f)
+        return json
+
+    def test_basic(self):
+        expect_lines = [
+            'BM_One',
+            'BM_Two',
+            'short',  # These two are not sorted
+            'medium',  # These two are not sorted
+        ]
+        json = self.load_results()
+        output_lines = get_unique_benchmark_names(json)
+        print("\n")
+        print("\n".join(output_lines))
+        self.assertEqual(len(output_lines), len(expect_lines))
+        for i in range(0, len(output_lines)):
+            self.assertEqual(expect_lines[i], output_lines[i])
+
+
+class TestReportDifference(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        def load_results():
+            import json
+            testInputs = os.path.join(
+                os.path.dirname(
+                    os.path.realpath(__file__)),
+                'Inputs')
+            testOutput1 = os.path.join(testInputs, 'test1_run1.json')
+            testOutput2 = os.path.join(testInputs, 'test1_run2.json')
+            with open(testOutput1, 'r') as f:
+                json1 = json.load(f)
+            with open(testOutput2, 'r') as f:
+                json2 = json.load(f)
+            return json1, json2
+
+        json1, json2 = load_results()
+        cls.json_diff_report = get_difference_report(json1, json2)
+
+    def test_json_diff_report_pretty_printing(self):
+        expect_lines = [
+            ['BM_SameTimes', '+0.0000', '+0.0000', '10', '10', '10', '10'],
+            ['BM_2xFaster', '-0.5000', '-0.5000', '50', '25', '50', '25'],
+            ['BM_2xSlower', '+1.0000', '+1.0000', '50', '100', '50', '100'],
+            ['BM_1PercentFaster', '-0.0100', '-0.0100', '100', '99', '100', '99'],
+            ['BM_1PercentSlower', '+0.0100', '+0.0100', '100', '101', '100', '101'],
+            ['BM_10PercentFaster', '-0.1000', '-0.1000', '100', '90', '100', '90'],
+            ['BM_10PercentSlower', '+0.1000', '+0.1000', '100', '110', '100', '110'],
+            ['BM_100xSlower', '+99.0000', '+99.0000',
+                '100', '10000', '100', '10000'],
+            ['BM_100xFaster', '-0.9900', '-0.9900',
+                '10000', '100', '10000', '100'],
+            ['BM_10PercentCPUToTime', '+0.1000',
+                '-0.1000', '100', '110', '100', '90'],
+            ['BM_ThirdFaster', '-0.3333', '-0.3334', '100', '67', '100', '67'],
+            ['BM_NotBadTimeUnit', '-0.9000', '+0.2000', '0', '0', '0', '1'],
+            ['OVERALL_GEOMEAN', '-0.8344', '-0.8026', '0', '0', '0', '0']
+        ]
+        output_lines_with_header = print_difference_report(
+            self.json_diff_report, use_color=False)
+        output_lines = output_lines_with_header[2:]
+        print("\n")
+        print("\n".join(output_lines_with_header))
+        self.assertEqual(len(output_lines), len(expect_lines))
+        for i in range(0, len(output_lines)):
+            parts = [x for x in output_lines[i].split(' ') if x]
+            self.assertEqual(len(parts), 7)
+            self.assertEqual(expect_lines[i], parts)
+
+    def test_json_diff_report_output(self):
+        expected_output = [
+            {
+                'name': 'BM_SameTimes',
+                'measurements': [{'time': 0.0000, 'cpu': 0.0000, 'real_time': 10, 'real_time_other': 10, 'cpu_time': 10, 'cpu_time_other': 10}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': 'BM_2xFaster',
+                'measurements': [{'time': -0.5000, 'cpu': -0.5000, 'real_time': 50, 'real_time_other': 25, 'cpu_time': 50, 'cpu_time_other': 25}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': 'BM_2xSlower',
+                'measurements': [{'time': 1.0000, 'cpu': 1.0000, 'real_time': 50, 'real_time_other': 100, 'cpu_time': 50, 'cpu_time_other': 100}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': 'BM_1PercentFaster',
+                'measurements': [{'time': -0.0100, 'cpu': -0.0100, 'real_time': 100, 'real_time_other': 98.9999999, 'cpu_time': 100, 'cpu_time_other': 98.9999999}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': 'BM_1PercentSlower',
+                'measurements': [{'time': 0.0100, 'cpu': 0.0100, 'real_time': 100, 'real_time_other': 101, 'cpu_time': 100, 'cpu_time_other': 101}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': 'BM_10PercentFaster',
+                'measurements': [{'time': -0.1000, 'cpu': -0.1000, 'real_time': 100, 'real_time_other': 90, 'cpu_time': 100, 'cpu_time_other': 90}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': 'BM_10PercentSlower',
+                'measurements': [{'time': 0.1000, 'cpu': 0.1000, 'real_time': 100, 'real_time_other': 110, 'cpu_time': 100, 'cpu_time_other': 110}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': 'BM_100xSlower',
+                'measurements': [{'time': 99.0000, 'cpu': 99.0000, 'real_time': 100, 'real_time_other': 10000, 'cpu_time': 100, 'cpu_time_other': 10000}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': 'BM_100xFaster',
+                'measurements': [{'time': -0.9900, 'cpu': -0.9900, 'real_time': 10000, 'real_time_other': 100, 'cpu_time': 10000, 'cpu_time_other': 100}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': 'BM_10PercentCPUToTime',
+                'measurements': [{'time': 0.1000, 'cpu': -0.1000, 'real_time': 100, 'real_time_other': 110, 'cpu_time': 100, 'cpu_time_other': 90}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': 'BM_ThirdFaster',
+                'measurements': [{'time': -0.3333, 'cpu': -0.3334, 'real_time': 100, 'real_time_other': 67, 'cpu_time': 100, 'cpu_time_other': 67}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': 'BM_NotBadTimeUnit',
+                'measurements': [{'time': -0.9000, 'cpu': 0.2000, 'real_time': 0.4, 'real_time_other': 0.04, 'cpu_time': 0.5, 'cpu_time_other': 0.6}],
+                'time_unit': 's',
+                'utest': {}
+            },
+            {
+                'name': 'OVERALL_GEOMEAN',
+                'measurements': [{'real_time': 1.193776641714438e-06, 'cpu_time': 1.2144445585302297e-06,
+                                  'real_time_other': 1.9768988699420897e-07, 'cpu_time_other': 2.397447755209533e-07,
+                                  'time': -0.834399601997324, 'cpu': -0.8025889499549471}],
+                'time_unit': 's',
+                'run_type': 'aggregate',
+                'aggregate_name': 'geomean', 'utest': {}
+            },
+        ]
+        self.assertEqual(len(self.json_diff_report), len(expected_output))
+        for out, expected in zip(
+                self.json_diff_report, expected_output):
+            self.assertEqual(out['name'], expected['name'])
+            self.assertEqual(out['time_unit'], expected['time_unit'])
+            assert_utest(self, out, expected)
+            assert_measurements(self, out, expected)
+
+
+class TestReportDifferenceBetweenFamilies(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        def load_result():
+            import json
+            testInputs = os.path.join(
+                os.path.dirname(
+                    os.path.realpath(__file__)),
+                'Inputs')
+            testOutput = os.path.join(testInputs, 'test2_run.json')
+            with open(testOutput, 'r') as f:
+                json = json.load(f)
+            return json
+
+        json = load_result()
+        json1 = filter_benchmark(json, "BM_Z.ro", ".")
+        json2 = filter_benchmark(json, "BM_O.e", ".")
+        cls.json_diff_report = get_difference_report(json1, json2)
+
+    def test_json_diff_report_pretty_printing(self):
+        expect_lines = [
+            ['.', '-0.5000', '-0.5000', '10', '5', '10', '5'],
+            ['./4', '-0.5000', '-0.5000', '40', '20', '40', '20'],
+            ['Prefix/.', '-0.5000', '-0.5000', '20', '10', '20', '10'],
+            ['Prefix/./3', '-0.5000', '-0.5000', '30', '15', '30', '15'],
+            ['OVERALL_GEOMEAN', '-0.5000', '-0.5000', '0', '0', '0', '0']
+        ]
+        output_lines_with_header = print_difference_report(
+            self.json_diff_report, use_color=False)
+        output_lines = output_lines_with_header[2:]
+        print("\n")
+        print("\n".join(output_lines_with_header))
+        self.assertEqual(len(output_lines), len(expect_lines))
+        for i in range(0, len(output_lines)):
+            parts = [x for x in output_lines[i].split(' ') if x]
+            self.assertEqual(len(parts), 7)
+            self.assertEqual(expect_lines[i], parts)
+
+    def test_json_diff_report(self):
+        expected_output = [
+            {
+                'name': u'.',
+                'measurements': [{'time': -0.5, 'cpu': -0.5, 'real_time': 10, 'real_time_other': 5, 'cpu_time': 10, 'cpu_time_other': 5}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': u'./4',
+                'measurements': [{'time': -0.5, 'cpu': -0.5, 'real_time': 40, 'real_time_other': 20, 'cpu_time': 40, 'cpu_time_other': 20}],
+                'time_unit': 'ns',
+                'utest': {},
+            },
+            {
+                'name': u'Prefix/.',
+                'measurements': [{'time': -0.5, 'cpu': -0.5, 'real_time': 20, 'real_time_other': 10, 'cpu_time': 20, 'cpu_time_other': 10}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': u'Prefix/./3',
+                'measurements': [{'time': -0.5, 'cpu': -0.5, 'real_time': 30, 'real_time_other': 15, 'cpu_time': 30, 'cpu_time_other': 15}],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': 'OVERALL_GEOMEAN',
+                'measurements': [{'real_time': 2.213363839400641e-08, 'cpu_time': 2.213363839400641e-08,
+                                  'real_time_other': 1.1066819197003185e-08, 'cpu_time_other': 1.1066819197003185e-08,
+                                  'time': -0.5000000000000009, 'cpu': -0.5000000000000009}],
+                'time_unit': 's',
+                'run_type': 'aggregate',
+                'aggregate_name': 'geomean',
+                'utest': {}
+            }
+        ]
+        self.assertEqual(len(self.json_diff_report), len(expected_output))
+        for out, expected in zip(
+                self.json_diff_report, expected_output):
+            self.assertEqual(out['name'], expected['name'])
+            self.assertEqual(out['time_unit'], expected['time_unit'])
+            assert_utest(self, out, expected)
+            assert_measurements(self, out, expected)
+
+
+class TestReportDifferenceWithUTest(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        def load_results():
+            import json
+            testInputs = os.path.join(
+                os.path.dirname(
+                    os.path.realpath(__file__)),
+                'Inputs')
+            testOutput1 = os.path.join(testInputs, 'test3_run0.json')
+            testOutput2 = os.path.join(testInputs, 'test3_run1.json')
+            with open(testOutput1, 'r') as f:
+                json1 = json.load(f)
+            with open(testOutput2, 'r') as f:
+                json2 = json.load(f)
+            return json1, json2
+
+        json1, json2 = load_results()
+        cls.json_diff_report = get_difference_report(
+            json1, json2, utest=True)
+
+    def test_json_diff_report_pretty_printing(self):
+        expect_lines = [
+            ['BM_One', '-0.1000', '+0.1000', '10', '9', '100', '110'],
+            ['BM_Two', '+0.1111', '-0.0111', '9', '10', '90', '89'],
+            ['BM_Two', '-0.1250', '-0.1628', '8', '7', '86', '72'],
+            ['BM_Two_pvalue',
+             '1.0000',
+             '0.6667',
+             'U',
+             'Test,',
+             'Repetitions:',
+             '2',
+             'vs',
+             '2.',
+             'WARNING:',
+             'Results',
+             'unreliable!',
+             '9+',
+             'repetitions',
+             'recommended.'],
+            ['short', '-0.1250', '-0.0625', '8', '7', '80', '75'],
+            ['short', '-0.4325', '-0.1351', '8', '5', '77', '67'],
+            ['short_pvalue',
+             '0.7671',
+             '0.2000',
+             'U',
+             'Test,',
+             'Repetitions:',
+             '2',
+             'vs',
+             '3.',
+             'WARNING:',
+             'Results',
+             'unreliable!',
+             '9+',
+             'repetitions',
+             'recommended.'],
+            ['medium', '-0.3750', '-0.3375', '8', '5', '80', '53'],
+            ['OVERALL_GEOMEAN', '+1.6405', '-0.6985', '0', '0', '0', '0']
+        ]
+        output_lines_with_header = print_difference_report(
+            self.json_diff_report, utest=True, utest_alpha=0.05, use_color=False)
+        output_lines = output_lines_with_header[2:]
+        print("\n")
+        print("\n".join(output_lines_with_header))
+        self.assertEqual(len(output_lines), len(expect_lines))
+        for i in range(0, len(output_lines)):
+            parts = [x for x in output_lines[i].split(' ') if x]
+            self.assertEqual(expect_lines[i], parts)
+
+    def test_json_diff_report_pretty_printing_aggregates_only(self):
+        expect_lines = [
+            ['BM_One', '-0.1000', '+0.1000', '10', '9', '100', '110'],
+            ['BM_Two_pvalue',
+             '1.0000',
+             '0.6667',
+             'U',
+             'Test,',
+             'Repetitions:',
+             '2',
+             'vs',
+             '2.',
+             'WARNING:',
+             'Results',
+             'unreliable!',
+             '9+',
+             'repetitions',
+             'recommended.'],
+            ['short', '-0.1250', '-0.0625', '8', '7', '80', '75'],
+            ['short', '-0.4325', '-0.1351', '8', '5', '77', '67'],
+            ['short_pvalue',
+             '0.7671',
+             '0.2000',
+             'U',
+             'Test,',
+             'Repetitions:',
+             '2',
+             'vs',
+             '3.',
+             'WARNING:',
+             'Results',
+             'unreliable!',
+             '9+',
+             'repetitions',
+             'recommended.'],
+            ['OVERALL_GEOMEAN', '+1.6405', '-0.6985', '0', '0', '0', '0']
+        ]
+        output_lines_with_header = print_difference_report(
+            self.json_diff_report, include_aggregates_only=True, utest=True, utest_alpha=0.05, use_color=False)
+        output_lines = output_lines_with_header[2:]
+        print("\n")
+        print("\n".join(output_lines_with_header))
+        self.assertEqual(len(output_lines), len(expect_lines))
+        for i in range(0, len(output_lines)):
+            parts = [x for x in output_lines[i].split(' ') if x]
+            self.assertEqual(expect_lines[i], parts)
+
+    def test_json_diff_report(self):
+        expected_output = [
+            {
+                'name': u'BM_One',
+                'measurements': [
+                    {'time': -0.1,
+                     'cpu': 0.1,
+                     'real_time': 10,
+                     'real_time_other': 9,
+                     'cpu_time': 100,
+                     'cpu_time_other': 110}
+                ],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': u'BM_Two',
+                'measurements': [
+                    {'time': 0.1111111111111111,
+                     'cpu': -0.011111111111111112,
+                     'real_time': 9,
+                     'real_time_other': 10,
+                     'cpu_time': 90,
+                     'cpu_time_other': 89},
+                    {'time': -0.125, 'cpu': -0.16279069767441862, 'real_time': 8,
+                        'real_time_other': 7, 'cpu_time': 86, 'cpu_time_other': 72}
+                ],
+                'time_unit': 'ns',
+                'utest': {
+                    'have_optimal_repetitions': False, 'cpu_pvalue': 0.6666666666666666, 'time_pvalue': 1.0
+                }
+            },
+            {
+                'name': u'short',
+                'measurements': [
+                    {'time': -0.125,
+                     'cpu': -0.0625,
+                     'real_time': 8,
+                     'real_time_other': 7,
+                     'cpu_time': 80,
+                     'cpu_time_other': 75},
+                    {'time': -0.4325,
+                     'cpu': -0.13506493506493514,
+                     'real_time': 8,
+                     'real_time_other': 4.54,
+                     'cpu_time': 77,
+                     'cpu_time_other': 66.6}
+                ],
+                'time_unit': 'ns',
+                'utest': {
+                    'have_optimal_repetitions': False, 'cpu_pvalue': 0.2, 'time_pvalue': 0.7670968684102772
+                }
+            },
+            {
+                'name': u'medium',
+                'measurements': [
+                    {'time': -0.375,
+                     'cpu': -0.3375,
+                     'real_time': 8,
+                     'real_time_other': 5,
+                     'cpu_time': 80,
+                     'cpu_time_other': 53}
+                ],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': 'OVERALL_GEOMEAN',
+                'measurements': [{'real_time': 8.48528137423858e-09, 'cpu_time': 8.441336246629233e-08,
+                                  'real_time_other': 2.2405267593145244e-08, 'cpu_time_other': 2.5453661413660466e-08,
+                                  'time': 1.6404861082353634, 'cpu': -0.6984640740519662}],
+                'time_unit': 's',
+                'run_type': 'aggregate',
+                'aggregate_name': 'geomean',
+                'utest': {}
+            }
+        ]
+        self.assertEqual(len(self.json_diff_report), len(expected_output))
+        for out, expected in zip(
+                self.json_diff_report, expected_output):
+            self.assertEqual(out['name'], expected['name'])
+            self.assertEqual(out['time_unit'], expected['time_unit'])
+            assert_utest(self, out, expected)
+            assert_measurements(self, out, expected)
+
+
+class TestReportDifferenceWithUTestWhileDisplayingAggregatesOnly(
+        unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        def load_results():
+            import json
+            testInputs = os.path.join(
+                os.path.dirname(
+                    os.path.realpath(__file__)),
+                'Inputs')
+            testOutput1 = os.path.join(testInputs, 'test3_run0.json')
+            testOutput2 = os.path.join(testInputs, 'test3_run1.json')
+            with open(testOutput1, 'r') as f:
+                json1 = json.load(f)
+            with open(testOutput2, 'r') as f:
+                json2 = json.load(f)
+            return json1, json2
+
+        json1, json2 = load_results()
+        cls.json_diff_report = get_difference_report(
+            json1, json2, utest=True)
+
+    def test_json_diff_report_pretty_printing(self):
+        expect_lines = [
+            ['BM_One', '-0.1000', '+0.1000', '10', '9', '100', '110'],
+            ['BM_Two', '+0.1111', '-0.0111', '9', '10', '90', '89'],
+            ['BM_Two', '-0.1250', '-0.1628', '8', '7', '86', '72'],
+            ['BM_Two_pvalue',
+             '1.0000',
+             '0.6667',
+             'U',
+             'Test,',
+             'Repetitions:',
+             '2',
+             'vs',
+             '2.',
+             'WARNING:',
+             'Results',
+             'unreliable!',
+             '9+',
+             'repetitions',
+             'recommended.'],
+            ['short', '-0.1250', '-0.0625', '8', '7', '80', '75'],
+            ['short', '-0.4325', '-0.1351', '8', '5', '77', '67'],
+            ['short_pvalue',
+             '0.7671',
+             '0.2000',
+             'U',
+             'Test,',
+             'Repetitions:',
+             '2',
+             'vs',
+             '3.',
+             'WARNING:',
+             'Results',
+             'unreliable!',
+             '9+',
+             'repetitions',
+             'recommended.'],
+            ['medium', '-0.3750', '-0.3375', '8', '5', '80', '53'],
+            ['OVERALL_GEOMEAN', '+1.6405', '-0.6985', '0', '0', '0', '0']
+        ]
+        output_lines_with_header = print_difference_report(
+            self.json_diff_report,
+            utest=True, utest_alpha=0.05, use_color=False)
+        output_lines = output_lines_with_header[2:]
+        print("\n")
+        print("\n".join(output_lines_with_header))
+        self.assertEqual(len(output_lines), len(expect_lines))
+        for i in range(0, len(output_lines)):
+            parts = [x for x in output_lines[i].split(' ') if x]
+            self.assertEqual(expect_lines[i], parts)
+
+    def test_json_diff_report(self):
+        expected_output = [
+            {
+                'name': u'BM_One',
+                'measurements': [
+                    {'time': -0.1,
+                     'cpu': 0.1,
+                     'real_time': 10,
+                     'real_time_other': 9,
+                     'cpu_time': 100,
+                     'cpu_time_other': 110}
+                ],
+                'time_unit': 'ns',
+                'utest': {}
+            },
+            {
+                'name': u'BM_Two',
+                'measurements': [
+                    {'time': 0.1111111111111111,
+                     'cpu': -0.011111111111111112,
+                     'real_time': 9,
+                     'real_time_other': 10,
+                     'cpu_time': 90,
+                     'cpu_time_other': 89},
+                    {'time': -0.125, 'cpu': -0.16279069767441862, 'real_time': 8,
+                        'real_time_other': 7, 'cpu_time': 86, 'cpu_time_other': 72}
+                ],
+                'time_unit': 'ns',
+                'utest': {
+                    'have_optimal_repetitions': False, 'cpu_pvalue': 0.6666666666666666, 'time_pvalue': 1.0
+                }
+            },
+            {
+                'name': u'short',
+                'measurements': [
+                    {'time': -0.125,
+                     'cpu': -0.0625,
+                     'real_time': 8,
+                     'real_time_other': 7,
+                     'cpu_time': 80,
+                     'cpu_time_other': 75},
+                    {'time': -0.4325,
+                     'cpu': -0.13506493506493514,
+                     'real_time': 8,
+                     'real_time_other': 4.54,
+                     'cpu_time': 77,
+                     'cpu_time_other': 66.6}
+                ],
+                'time_unit': 'ns',
+                'utest': {
+                    'have_optimal_repetitions': False, 'cpu_pvalue': 0.2, 'time_pvalue': 0.7670968684102772
+                }
+            },
+            {
+                'name': u'medium',
+                'measurements': [
+                    {'real_time_other': 5,
+                     'cpu_time': 80,
+                     'time': -0.375,
+                     'real_time': 8,
+                     'cpu_time_other': 53,
+                     'cpu': -0.3375
+                     }
+                ],
+                'utest': {},
+                'time_unit': u'ns',
+                'aggregate_name': ''
+            },
+            {
+                'name': 'OVERALL_GEOMEAN',
+                'measurements': [{'real_time': 8.48528137423858e-09, 'cpu_time': 8.441336246629233e-08,
+                                  'real_time_other': 2.2405267593145244e-08, 'cpu_time_other': 2.5453661413660466e-08,
+                                  'time': 1.6404861082353634, 'cpu': -0.6984640740519662}],
+                'time_unit': 's',
+                'run_type': 'aggregate',
+                'aggregate_name': 'geomean',
+                'utest': {}
+            }
+        ]
+        self.assertEqual(len(self.json_diff_report), len(expected_output))
+        for out, expected in zip(
+                self.json_diff_report, expected_output):
+            self.assertEqual(out['name'], expected['name'])
+            self.assertEqual(out['time_unit'], expected['time_unit'])
+            assert_utest(self, out, expected)
+            assert_measurements(self, out, expected)
+
+
+class TestReportDifferenceForPercentageAggregates(
+        unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        def load_results():
+            import json
+            testInputs = os.path.join(
+                os.path.dirname(
+                    os.path.realpath(__file__)),
+                'Inputs')
+            testOutput1 = os.path.join(testInputs, 'test4_run0.json')
+            testOutput2 = os.path.join(testInputs, 'test4_run1.json')
+            with open(testOutput1, 'r') as f:
+                json1 = json.load(f)
+            with open(testOutput2, 'r') as f:
+                json2 = json.load(f)
+            return json1, json2
+
+        json1, json2 = load_results()
+        cls.json_diff_report = get_difference_report(
+            json1, json2, utest=True)
+
+    def test_json_diff_report_pretty_printing(self):
+        expect_lines = [
+            ['whocares', '-0.5000', '+0.5000', '0', '0', '0', '0']
+        ]
+        output_lines_with_header = print_difference_report(
+            self.json_diff_report,
+            utest=True, utest_alpha=0.05, use_color=False)
+        output_lines = output_lines_with_header[2:]
+        print("\n")
+        print("\n".join(output_lines_with_header))
+        self.assertEqual(len(output_lines), len(expect_lines))
+        for i in range(0, len(output_lines)):
+            parts = [x for x in output_lines[i].split(' ') if x]
+            self.assertEqual(expect_lines[i], parts)
+
+    def test_json_diff_report(self):
+        expected_output = [
+            {
+                'name': u'whocares',
+                'measurements': [
+                    {'time': -0.5,
+                     'cpu': 0.5,
+                     'real_time': 0.01,
+                     'real_time_other': 0.005,
+                     'cpu_time': 0.10,
+                     'cpu_time_other': 0.15}
+                ],
+                'time_unit': 'ns',
+                'utest': {}
+            }
+        ]
+        self.assertEqual(len(self.json_diff_report), len(expected_output))
+        for out, expected in zip(
+                self.json_diff_report, expected_output):
+            self.assertEqual(out['name'], expected['name'])
+            self.assertEqual(out['time_unit'], expected['time_unit'])
+            assert_utest(self, out, expected)
+            assert_measurements(self, out, expected)
+
+
+class TestReportSorting(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        def load_result():
+            import json
+            testInputs = os.path.join(
+                os.path.dirname(
+                    os.path.realpath(__file__)),
+                'Inputs')
+            testOutput = os.path.join(testInputs, 'test4_run.json')
+            with open(testOutput, 'r') as f:
+                json = json.load(f)
+            return json
+
+        cls.json = load_result()
+
+    def test_json_diff_report_pretty_printing(self):
+        import util
+
+        expected_names = [
+            "99 family 0 instance 0 repetition 0",
+            "98 family 0 instance 0 repetition 1",
+            "97 family 0 instance 0 aggregate",
+            "96 family 0 instance 1 repetition 0",
+            "95 family 0 instance 1 repetition 1",
+            "94 family 0 instance 1 aggregate",
+            "93 family 1 instance 0 repetition 0",
+            "92 family 1 instance 0 repetition 1",
+            "91 family 1 instance 0 aggregate",
+            "90 family 1 instance 1 repetition 0",
+            "89 family 1 instance 1 repetition 1",
+            "88 family 1 instance 1 aggregate"
+        ]
+
+        for n in range(len(self.json['benchmarks']) ** 2):
+            random.shuffle(self.json['benchmarks'])
+            sorted_benchmarks = util.sort_benchmark_results(self.json)[
+                'benchmarks']
+            self.assertEqual(len(expected_names), len(sorted_benchmarks))
+            for out, expected in zip(sorted_benchmarks, expected_names):
+                self.assertEqual(out['name'], expected)
+
+
+def assert_utest(unittest_instance, lhs, rhs):
+    if lhs['utest']:
+        unittest_instance.assertAlmostEqual(
+            lhs['utest']['cpu_pvalue'],
+            rhs['utest']['cpu_pvalue'])
+        unittest_instance.assertAlmostEqual(
+            lhs['utest']['time_pvalue'],
+            rhs['utest']['time_pvalue'])
+        unittest_instance.assertEqual(
+            lhs['utest']['have_optimal_repetitions'],
+            rhs['utest']['have_optimal_repetitions'])
+    else:
+        # lhs is empty. assert if rhs is not.
+        unittest_instance.assertEqual(lhs['utest'], rhs['utest'])
+
+
+def assert_measurements(unittest_instance, lhs, rhs):
+    for m1, m2 in zip(lhs['measurements'], rhs['measurements']):
+        unittest_instance.assertEqual(m1['real_time'], m2['real_time'])
+        unittest_instance.assertEqual(m1['cpu_time'], m2['cpu_time'])
+        # m1['time'] and m1['cpu'] hold values which are being calculated,
+        # and therefore we must use almost-equal pattern.
+        unittest_instance.assertAlmostEqual(m1['time'], m2['time'], places=4)
+        unittest_instance.assertAlmostEqual(m1['cpu'], m2['cpu'], places=4)
+
+
+if __name__ == '__main__':
+    unittest.main()
+
+# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
+# kate: tab-width: 4; replace-tabs on; indent-width 4; tab-indents: off;
+# kate: indent-mode python; remove-trailing-spaces modified;
diff --git a/3rdparty/benchmark/tools/gbench/util.py b/3rdparty/benchmark/tools/gbench/util.py
new file mode 100644
index 00000000..5d0012c0
--- /dev/null
+++ b/3rdparty/benchmark/tools/gbench/util.py
@@ -0,0 +1,181 @@
+"""util.py - General utilities for running, loading, and processing benchmarks
+"""
+import json
+import os
+import tempfile
+import subprocess
+import sys
+import functools
+
+# Input file type enumeration
+IT_Invalid = 0
+IT_JSON = 1
+IT_Executable = 2
+
+_num_magic_bytes = 2 if sys.platform.startswith('win') else 4
+
+
+def is_executable_file(filename):
+    """
+    Return 'True' if 'filename' names a valid file which is likely
+    an executable. A file is considered an executable if it starts with the
+    magic bytes for a EXE, Mach O, or ELF file.
+    """
+    if not os.path.isfile(filename):
+        return False
+    with open(filename, mode='rb') as f:
+        magic_bytes = f.read(_num_magic_bytes)
+    if sys.platform == 'darwin':
+        return magic_bytes in [
+            b'\xfe\xed\xfa\xce',  # MH_MAGIC
+            b'\xce\xfa\xed\xfe',  # MH_CIGAM
+            b'\xfe\xed\xfa\xcf',  # MH_MAGIC_64
+            b'\xcf\xfa\xed\xfe',  # MH_CIGAM_64
+            b'\xca\xfe\xba\xbe',  # FAT_MAGIC
+            b'\xbe\xba\xfe\xca'   # FAT_CIGAM
+        ]
+    elif sys.platform.startswith('win'):
+        return magic_bytes == b'MZ'
+    else:
+        return magic_bytes == b'\x7FELF'
+
+
+def is_json_file(filename):
+    """
+    Returns 'True' if 'filename' names a valid JSON output file.
+    'False' otherwise.
+    """
+    try:
+        with open(filename, 'r') as f:
+            json.load(f)
+        return True
+    except BaseException:
+        pass
+    return False
+
+
+def classify_input_file(filename):
+    """
+    Return a tuple (type, msg) where 'type' specifies the classified type
+    of 'filename'. If 'type' is 'IT_Invalid' then 'msg' is a human readable
+    string represeting the error.
+    """
+    ftype = IT_Invalid
+    err_msg = None
+    if not os.path.exists(filename):
+        err_msg = "'%s' does not exist" % filename
+    elif not os.path.isfile(filename):
+        err_msg = "'%s' does not name a file" % filename
+    elif is_executable_file(filename):
+        ftype = IT_Executable
+    elif is_json_file(filename):
+        ftype = IT_JSON
+    else:
+        err_msg = "'%s' does not name a valid benchmark executable or JSON file" % filename
+    return ftype, err_msg
+
+
+def check_input_file(filename):
+    """
+    Classify the file named by 'filename' and return the classification.
+    If the file is classified as 'IT_Invalid' print an error message and exit
+    the program.
+    """
+    ftype, msg = classify_input_file(filename)
+    if ftype == IT_Invalid:
+        print("Invalid input file: %s" % msg)
+        sys.exit(1)
+    return ftype
+
+
+def find_benchmark_flag(prefix, benchmark_flags):
+    """
+    Search the specified list of flags for a flag matching `<prefix><arg>` and
+    if it is found return the arg it specifies. If specified more than once the
+    last value is returned. If the flag is not found None is returned.
+    """
+    assert prefix.startswith('--') and prefix.endswith('=')
+    result = None
+    for f in benchmark_flags:
+        if f.startswith(prefix):
+            result = f[len(prefix):]
+    return result
+
+
+def remove_benchmark_flags(prefix, benchmark_flags):
+    """
+    Return a new list containing the specified benchmark_flags except those
+    with the specified prefix.
+    """
+    assert prefix.startswith('--') and prefix.endswith('=')
+    return [f for f in benchmark_flags if not f.startswith(prefix)]
+
+
+def load_benchmark_results(fname):
+    """
+    Read benchmark output from a file and return the JSON object.
+    REQUIRES: 'fname' names a file containing JSON benchmark output.
+    """
+    with open(fname, 'r') as f:
+        return json.load(f)
+
+
+def sort_benchmark_results(result):
+    benchmarks = result['benchmarks']
+
+    # From inner key to the outer key!
+    benchmarks = sorted(
+        benchmarks, key=lambda benchmark: benchmark['repetition_index'] if 'repetition_index' in benchmark else -1)
+    benchmarks = sorted(
+        benchmarks, key=lambda benchmark: 1 if 'run_type' in benchmark and benchmark['run_type'] == "aggregate" else 0)
+    benchmarks = sorted(
+        benchmarks, key=lambda benchmark: benchmark['per_family_instance_index'] if 'per_family_instance_index' in benchmark else -1)
+    benchmarks = sorted(
+        benchmarks, key=lambda benchmark: benchmark['family_index'] if 'family_index' in benchmark else -1)
+
+    result['benchmarks'] = benchmarks
+    return result
+
+
+def run_benchmark(exe_name, benchmark_flags):
+    """
+    Run a benchmark specified by 'exe_name' with the specified
+    'benchmark_flags'. The benchmark is run directly as a subprocess to preserve
+    real time console output.
+    RETURNS: A JSON object representing the benchmark output
+    """
+    output_name = find_benchmark_flag('--benchmark_out=',
+                                      benchmark_flags)
+    is_temp_output = False
+    if output_name is None:
+        is_temp_output = True
+        thandle, output_name = tempfile.mkstemp()
+        os.close(thandle)
+        benchmark_flags = list(benchmark_flags) + \
+            ['--benchmark_out=%s' % output_name]
+
+    cmd = [exe_name] + benchmark_flags
+    print("RUNNING: %s" % ' '.join(cmd))
+    exitCode = subprocess.call(cmd)
+    if exitCode != 0:
+        print('TEST FAILED...')
+        sys.exit(exitCode)
+    json_res = load_benchmark_results(output_name)
+    if is_temp_output:
+        os.unlink(output_name)
+    return json_res
+
+
+def run_or_load_benchmark(filename, benchmark_flags):
+    """
+    Get the results for a specified benchmark. If 'filename' specifies
+    an executable benchmark then the results are generated by running the
+    benchmark. Otherwise 'filename' must name a valid JSON output file,
+    which is loaded and the result returned.
+    """
+    ftype = check_input_file(filename)
+    if ftype == IT_JSON:
+        return load_benchmark_results(filename)
+    if ftype == IT_Executable:
+        return run_benchmark(filename, benchmark_flags)
+    raise ValueError('Unknown file type %s' % ftype)
diff --git a/3rdparty/benchmark/tools/requirements.txt b/3rdparty/benchmark/tools/requirements.txt
new file mode 100644
index 00000000..3b3331b5
--- /dev/null
+++ b/3rdparty/benchmark/tools/requirements.txt
@@ -0,0 +1 @@
+scipy>=1.5.0
\ No newline at end of file
diff --git a/3rdparty/benchmark/tools/strip_asm.py b/3rdparty/benchmark/tools/strip_asm.py
new file mode 100644
index 00000000..9030550b
--- /dev/null
+++ b/3rdparty/benchmark/tools/strip_asm.py
@@ -0,0 +1,151 @@
+#!/usr/bin/env python
+
+"""
+strip_asm.py - Cleanup ASM output for the specified file
+"""
+
+from argparse import ArgumentParser
+import sys
+import os
+import re
+
+def find_used_labels(asm):
+    found = set()
+    label_re = re.compile("\s*j[a-z]+\s+\.L([a-zA-Z0-9][a-zA-Z0-9_]*)")
+    for l in asm.splitlines():
+        m = label_re.match(l)
+        if m:
+            found.add('.L%s' % m.group(1))
+    return found
+
+
+def normalize_labels(asm):
+    decls = set()
+    label_decl = re.compile("^[.]{0,1}L([a-zA-Z0-9][a-zA-Z0-9_]*)(?=:)")
+    for l in asm.splitlines():
+        m = label_decl.match(l)
+        if m:
+            decls.add(m.group(0))
+    if len(decls) == 0:
+        return asm
+    needs_dot = next(iter(decls))[0] != '.'
+    if not needs_dot:
+        return asm
+    for ld in decls:
+        asm = re.sub("(^|\s+)" + ld + "(?=:|\s)", '\\1.' + ld, asm)
+    return asm
+
+
+def transform_labels(asm):
+    asm = normalize_labels(asm)
+    used_decls = find_used_labels(asm)
+    new_asm = ''
+    label_decl = re.compile("^\.L([a-zA-Z0-9][a-zA-Z0-9_]*)(?=:)")
+    for l in asm.splitlines():
+        m = label_decl.match(l)
+        if not m or m.group(0) in used_decls:
+            new_asm += l
+            new_asm += '\n'
+    return new_asm
+
+
+def is_identifier(tk):
+    if len(tk) == 0:
+        return False
+    first = tk[0]
+    if not first.isalpha() and first != '_':
+        return False
+    for i in range(1, len(tk)):
+        c = tk[i]
+        if not c.isalnum() and c != '_':
+            return False
+    return True
+
+def process_identifiers(l):
+    """
+    process_identifiers - process all identifiers and modify them to have
+    consistent names across all platforms; specifically across ELF and MachO.
+    For example, MachO inserts an additional understore at the beginning of
+    names. This function removes that.
+    """
+    parts = re.split(r'([a-zA-Z0-9_]+)', l)
+    new_line = ''
+    for tk in parts:
+        if is_identifier(tk):
+            if tk.startswith('__Z'):
+                tk = tk[1:]
+            elif tk.startswith('_') and len(tk) > 1 and \
+                    tk[1].isalpha() and tk[1] != 'Z':
+                tk = tk[1:]
+        new_line += tk
+    return new_line
+
+
+def process_asm(asm):
+    """
+    Strip the ASM of unwanted directives and lines
+    """
+    new_contents = ''
+    asm = transform_labels(asm)
+
+    # TODO: Add more things we want to remove
+    discard_regexes = [
+        re.compile("\s+\..*$"), # directive
+        re.compile("\s*#(NO_APP|APP)$"), #inline ASM
+        re.compile("\s*#.*$"), # comment line
+        re.compile("\s*\.globa?l\s*([.a-zA-Z_][a-zA-Z0-9$_.]*)"), #global directive
+        re.compile("\s*\.(string|asciz|ascii|[1248]?byte|short|word|long|quad|value|zero)"),
+    ]
+    keep_regexes = [
+
+    ]
+    fn_label_def = re.compile("^[a-zA-Z_][a-zA-Z0-9_.]*:")
+    for l in asm.splitlines():
+        # Remove Mach-O attribute
+        l = l.replace('@GOTPCREL', '')
+        add_line = True
+        for reg in discard_regexes:
+            if reg.match(l) is not None:
+                add_line = False
+                break
+        for reg in keep_regexes:
+            if reg.match(l) is not None:
+                add_line = True
+                break
+        if add_line:
+            if fn_label_def.match(l) and len(new_contents) != 0:
+                new_contents += '\n'
+            l = process_identifiers(l)
+            new_contents += l
+            new_contents += '\n'
+    return new_contents
+
+def main():
+    parser = ArgumentParser(
+        description='generate a stripped assembly file')
+    parser.add_argument(
+        'input', metavar='input', type=str, nargs=1,
+        help='An input assembly file')
+    parser.add_argument(
+        'out', metavar='output', type=str, nargs=1,
+        help='The output file')
+    args, unknown_args = parser.parse_known_args()
+    input = args.input[0]
+    output = args.out[0]
+    if not os.path.isfile(input):
+        print(("ERROR: input file '%s' does not exist") % input)
+        sys.exit(1)
+    contents = None
+    with open(input, 'r') as f:
+        contents = f.read()
+    new_contents = process_asm(contents)
+    with open(output, 'w') as f:
+        f.write(new_contents)
+
+
+if __name__ == '__main__':
+    main()
+
+# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
+# kate: tab-width: 4; replace-tabs on; indent-width 4; tab-indents: off;
+# kate: indent-mode python; remove-trailing-spaces modified;
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d90529d5..d6ac2f06 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,7 @@ project(cpp-ipc)
 
 option(LIBIPC_BUILD_TESTS       "Build all of libipc's own tests."                      OFF)
 option(LIBIPC_BUILD_DEMOS       "Build all of libipc's own demos."                      OFF)
+option(LIBIPC_BUILD_BENCHMARK   "Build all of libipc's own benchmark tests."            OFF)
 option(LIBIPC_BUILD_SHARED_LIBS "Build shared libraries (DLLs)."                        OFF)
 option(LIBIPC_USE_STATIC_CRT    "Set to ON to build with static CRT on Windows (/MT)."  OFF)
 
@@ -61,6 +62,11 @@ endif()
 #   add_subdirectory(demo/send_recv)
 # endif()
 
+if (LIBIPC_BUILD_BENCHMARK)
+  set(BENCHMARK_ENABLE_TESTING OFF)
+  add_subdirectory(3rdparty/benchmark)
+endif()
+
 install(
   DIRECTORY "include/"
   DESTINATION "include"
diff --git a/benchmark/CMakeLists.txt b/benchmark/CMakeLists.txt
new file mode 100644
index 00000000..40879e87
--- /dev/null
+++ b/benchmark/CMakeLists.txt
@@ -0,0 +1,23 @@
+project(benchmark-ipc)
+
+if(NOT MSVC)
+  add_compile_options(
+    -Wno-attributes 
+    -Wno-missing-field-initializers 
+    -Wno-unused-variable 
+    -Wno-unused-function)
+else()
+  add_definitions(-D_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING)
+endif()
+
+include_directories(
+  ${LIBIPC_PROJECT_DIR}/include 
+  ${LIBIPC_PROJECT_DIR}/src
+  ${LIBIPC_PROJECT_DIR}/test)
+
+file(GLOB SRC_FILES  ${LIBIPC_PROJECT_DIR}/benchmark/*.cpp)
+file(GLOB HEAD_FILES ${LIBIPC_PROJECT_DIR}/benchmark/*.h)
+
+add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
+
+target_link_libraries(${PROJECT_NAME} benchmark_main imp ipc)
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 8633271f..d8c88ffe 100755
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -11,9 +11,7 @@ endif()
 include_directories(
   ${LIBIPC_PROJECT_DIR}/include 
   ${LIBIPC_PROJECT_DIR}/src
-  ${LIBIPC_PROJECT_DIR}/test
-  ${LIBIPC_PROJECT_DIR}/3rdparty
-  ${LIBIPC_PROJECT_DIR}/3rdparty/gtest/include)
+  ${LIBIPC_PROJECT_DIR}/test)
 
 file(GLOB SRC_FILES  ${LIBIPC_PROJECT_DIR}/test/*.cpp)
 file(GLOB HEAD_FILES ${LIBIPC_PROJECT_DIR}/test/*.h)
@@ -21,5 +19,5 @@ file(GLOB HEAD_FILES ${LIBIPC_PROJECT_DIR}/test/*.h)
 add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
 
 link_directories(${LIBIPC_PROJECT_DIR}/3rdparty/gperftools)
-target_link_libraries(${PROJECT_NAME} gtest gtest_main imp ipc)
+target_link_libraries(${PROJECT_NAME} gtest_main imp ipc)
 #target_link_libraries(${PROJECT_NAME} tcmalloc_minimal)

From c704aef5f11dcbeca1c65a98b0c3496a5086c2ba Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 15 May 2022 18:15:39 +0800
Subject: [PATCH 025/272] modify: adjust result so that it adjusts the output
 based on the type

---
 3rdparty/fmt/.clang-format                    |     8 +
 3rdparty/fmt/.gitignore                       |    37 +
 3rdparty/fmt/CMakeLists.txt                   |   415 +
 3rdparty/fmt/CONTRIBUTING.md                  |    20 +
 3rdparty/fmt/ChangeLog.rst                    |  4738 +++++
 3rdparty/fmt/LICENSE.rst                      |    27 +
 3rdparty/fmt/README.rst                       |   528 +
 3rdparty/fmt/doc/CMakeLists.txt               |    17 +
 3rdparty/fmt/doc/_static/bootstrap.min.js     |     7 +
 3rdparty/fmt/doc/_static/breathe.css          |    28 +
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 .../fonts/glyphicons-halflings-regular.svg    |   229 +
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 .../fonts/glyphicons-halflings-regular.woff   |   Bin 0 -> 23320 bytes
 3rdparty/fmt/doc/_templates/layout.html       |   148 +
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 3rdparty/fmt/doc/api.rst                      |   556 +
 3rdparty/fmt/doc/basic-bootstrap/README       |     2 +
 3rdparty/fmt/doc/basic-bootstrap/layout.html  |   208 +
 3rdparty/fmt/doc/basic-bootstrap/theme.conf   |     2 +
 3rdparty/fmt/doc/bootstrap/alerts.less        |    73 +
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 3rdparty/fmt/doc/bootstrap/wells.less         |    29 +
 3rdparty/fmt/doc/build.py                     |   118 +
 3rdparty/fmt/doc/conf.py                      |   256 +
 3rdparty/fmt/doc/contents.rst                 |    10 +
 3rdparty/fmt/doc/fmt.less                     |    71 +
 3rdparty/fmt/doc/index.rst                    |   198 +
 3rdparty/fmt/doc/python-license.txt           |   290 +
 3rdparty/fmt/doc/syntax.rst                   |   487 +
 3rdparty/fmt/doc/usage.rst                    |   212 +
 3rdparty/fmt/include/fmt/args.h               |   234 +
 3rdparty/fmt/include/fmt/chrono.h             |  2067 +++
 3rdparty/fmt/include/fmt/color.h              |   638 +
 3rdparty/fmt/include/fmt/compile.h            |   642 +
 3rdparty/fmt/include/fmt/core.h               |  3236 ++++
 3rdparty/fmt/include/fmt/format-inl.h         |  2643 +++
 3rdparty/fmt/include/fmt/format.h             |  3104 ++++
 3rdparty/fmt/include/fmt/locale.h             |     2 +
 3rdparty/fmt/include/fmt/os.h                 |   527 +
 3rdparty/fmt/include/fmt/ostream.h            |   135 +
 3rdparty/fmt/include/fmt/printf.h             |   657 +
 3rdparty/fmt/include/fmt/ranges.h             |   793 +
 3rdparty/fmt/include/fmt/xchar.h              |   236 +
 3rdparty/fmt/src/fmt.cc                       |    99 +
 3rdparty/fmt/src/format.cc                    |   124 +
 3rdparty/fmt/src/os.cc                        |   361 +
 3rdparty/fmt/support/Android.mk               |    15 +
 3rdparty/fmt/support/AndroidManifest.xml      |     1 +
 3rdparty/fmt/support/C++.sublime-syntax       |  2061 +++
 3rdparty/fmt/support/README                   |     4 +
 3rdparty/fmt/support/Vagrantfile              |    20 +
 3rdparty/fmt/support/appveyor-build.py        |    43 +
 3rdparty/fmt/support/appveyor.yml             |    31 +
 3rdparty/fmt/support/bazel/.bazelrc           |     1 +
 3rdparty/fmt/support/bazel/.bazelversion      |     1 +
 3rdparty/fmt/support/bazel/BUILD.bazel        |    29 +
 3rdparty/fmt/support/bazel/README.md          |    73 +
 3rdparty/fmt/support/bazel/WORKSPACE.bazel    |     1 +
 3rdparty/fmt/support/build-docs.py            |    58 +
 3rdparty/fmt/support/build.gradle             |   132 +
 3rdparty/fmt/support/cmake/FindSetEnv.cmake   |     7 +
 3rdparty/fmt/support/cmake/JoinPaths.cmake    |    26 +
 3rdparty/fmt/support/cmake/cxx14.cmake        |    70 +
 .../fmt/support/cmake/fmt-config.cmake.in     |     4 +
 3rdparty/fmt/support/cmake/fmt.pc.in          |    11 +
 3rdparty/fmt/support/compute-powers.py        |    53 +
 3rdparty/fmt/support/docopt.py                |   581 +
 3rdparty/fmt/support/manage.py                |   297 +
 3rdparty/fmt/support/printable.py             |   201 +
 3rdparty/fmt/support/rst2md.py                |   159 +
 3rdparty/fmt/support/rtd/conf.py              |     7 +
 3rdparty/fmt/support/rtd/index.rst            |     2 +
 3rdparty/fmt/support/rtd/theme/layout.html    |    17 +
 3rdparty/fmt/support/rtd/theme/theme.conf     |     2 +
 3rdparty/fmt/test/CMakeLists.txt              |   244 +
 .../test/add-subdirectory-test/CMakeLists.txt |    17 +
 .../fmt/test/add-subdirectory-test/main.cc    |     5 +
 3rdparty/fmt/test/args-test.cc                |   186 +
 3rdparty/fmt/test/assert-test.cc              |    31 +
 3rdparty/fmt/test/chrono-test.cc              |   625 +
 3rdparty/fmt/test/color-test.cc               |    66 +
 .../test/compile-error-test/CMakeLists.txt    |   203 +
 3rdparty/fmt/test/compile-fp-test.cc          |    62 +
 3rdparty/fmt/test/compile-test.cc             |   376 +
 3rdparty/fmt/test/core-test.cc                |   923 +
 3rdparty/fmt/test/cuda-test/CMakeLists.txt    |    73 +
 3rdparty/fmt/test/cuda-test/cpp14.cc          |    11 +
 3rdparty/fmt/test/cuda-test/cuda-cpp14.cu     |    28 +
 3rdparty/fmt/test/enforce-checks-test.cc      |    63 +
 .../fmt/test/find-package-test/CMakeLists.txt |    17 +
 3rdparty/fmt/test/find-package-test/main.cc   |     5 +
 3rdparty/fmt/test/format-impl-test.cc         |   377 +
 3rdparty/fmt/test/format-test.cc              |  2190 +++
 3rdparty/fmt/test/fuzzing/.gitignore          |     3 +
 3rdparty/fmt/test/fuzzing/CMakeLists.txt      |    30 +
 3rdparty/fmt/test/fuzzing/README.md           |    25 +
 3rdparty/fmt/test/fuzzing/build.sh            |    90 +
 3rdparty/fmt/test/fuzzing/chrono-duration.cc  |   136 +
 3rdparty/fmt/test/fuzzing/chrono-timepoint.cc |    32 +
 3rdparty/fmt/test/fuzzing/float.cc            |    39 +
 3rdparty/fmt/test/fuzzing/fuzzer-common.h     |    77 +
 3rdparty/fmt/test/fuzzing/main.cc             |    22 +
 3rdparty/fmt/test/fuzzing/named-arg.cc        |   102 +
 3rdparty/fmt/test/fuzzing/one-arg.cc          |    92 +
 3rdparty/fmt/test/fuzzing/two-args.cc         |   106 +
 3rdparty/fmt/test/gtest-extra-test.cc         |   413 +
 3rdparty/fmt/test/gtest-extra.cc              |    80 +
 3rdparty/fmt/test/gtest-extra.h               |   170 +
 3rdparty/fmt/test/gtest/.clang-format         |     3 +
 3rdparty/fmt/test/gtest/CMakeLists.txt        |    38 +
 3rdparty/fmt/test/gtest/gmock-gtest-all.cc    | 14434 ++++++++++++++++
 3rdparty/fmt/test/gtest/gmock/gmock.h         | 11645 +++++++++++++
 3rdparty/fmt/test/gtest/gtest/gtest-spi.h     |   238 +
 3rdparty/fmt/test/gtest/gtest/gtest.h         | 12398 +++++++++++++
 3rdparty/fmt/test/header-only-test.cc         |    11 +
 3rdparty/fmt/test/mock-allocator.h            |    64 +
 3rdparty/fmt/test/module-test.cc              |   580 +
 3rdparty/fmt/test/noexception-test.cc         |    18 +
 3rdparty/fmt/test/os-test.cc                  |   551 +
 3rdparty/fmt/test/ostream-test.cc             |   301 +
 3rdparty/fmt/test/posix-mock-test.cc          |   540 +
 3rdparty/fmt/test/posix-mock.h                |    77 +
 3rdparty/fmt/test/printf-test.cc              |   588 +
 3rdparty/fmt/test/ranges-odr-test.cc          |    17 +
 3rdparty/fmt/test/ranges-test.cc              |   363 +
 3rdparty/fmt/test/scan-test.cc                |   116 +
 3rdparty/fmt/test/scan.h                      |   241 +
 .../test/static-export-test/CMakeLists.txt    |    30 +
 .../fmt/test/static-export-test/library.cc    |     5 +
 3rdparty/fmt/test/static-export-test/main.cc  |     6 +
 3rdparty/fmt/test/test-assert.h               |    39 +
 3rdparty/fmt/test/test-main.cc                |    44 +
 3rdparty/fmt/test/unicode-test.cc             |    48 +
 3rdparty/fmt/test/util.cc                     |    46 +
 3rdparty/fmt/test/util.h                      |    85 +
 3rdparty/fmt/test/xchar-test.cc               |   502 +
 CMakeLists.txt                                |     2 +
 include/libimp/result.h                       |   108 +-
 include/libipc/mmap.h                         |     6 +
 src/libimp/CMakeLists.txt                     |     2 +
 src/libimp/result.cpp                         |    21 +-
 test/test_result.cpp                          |    58 +-
 210 files changed, 86346 insertions(+), 48 deletions(-)
 create mode 100644 3rdparty/fmt/.clang-format
 create mode 100644 3rdparty/fmt/.gitignore
 create mode 100644 3rdparty/fmt/CMakeLists.txt
 create mode 100644 3rdparty/fmt/CONTRIBUTING.md
 create mode 100644 3rdparty/fmt/ChangeLog.rst
 create mode 100644 3rdparty/fmt/LICENSE.rst
 create mode 100644 3rdparty/fmt/README.rst
 create mode 100644 3rdparty/fmt/doc/CMakeLists.txt
 create mode 100644 3rdparty/fmt/doc/_static/bootstrap.min.js
 create mode 100644 3rdparty/fmt/doc/_static/breathe.css
 create mode 100644 3rdparty/fmt/doc/_static/fonts/glyphicons-halflings-regular.eot
 create mode 100644 3rdparty/fmt/doc/_static/fonts/glyphicons-halflings-regular.svg
 create mode 100644 3rdparty/fmt/doc/_static/fonts/glyphicons-halflings-regular.ttf
 create mode 100644 3rdparty/fmt/doc/_static/fonts/glyphicons-halflings-regular.woff
 create mode 100644 3rdparty/fmt/doc/_templates/layout.html
 create mode 100644 3rdparty/fmt/doc/_templates/search.html
 create mode 100644 3rdparty/fmt/doc/api.rst
 create mode 100644 3rdparty/fmt/doc/basic-bootstrap/README
 create mode 100644 3rdparty/fmt/doc/basic-bootstrap/layout.html
 create mode 100644 3rdparty/fmt/doc/basic-bootstrap/theme.conf
 create mode 100644 3rdparty/fmt/doc/bootstrap/alerts.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/badges.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/bootstrap.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/breadcrumbs.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/button-groups.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/buttons.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/carousel.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/close.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/code.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/component-animations.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/dropdowns.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/forms.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/glyphicons.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/grid.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/input-groups.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/jumbotron.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/labels.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/list-group.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/media.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/alerts.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/background-variant.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/border-radius.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/buttons.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/center-block.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/clearfix.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/forms.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/gradients.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/grid-framework.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/grid.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/hide-text.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/image.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/labels.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/list-group.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/nav-divider.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/nav-vertical-align.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/opacity.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/pagination.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/panels.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/progress-bar.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/reset-filter.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/resize.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/responsive-visibility.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/size.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/tab-focus.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/table-row.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/text-emphasis.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/text-overflow.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/mixins/vendor-prefixes.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/modals.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/navbar.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/navs.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/normalize.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/pager.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/pagination.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/panels.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/popovers.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/print.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/progress-bars.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/responsive-embed.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/responsive-utilities.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/scaffolding.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/tables.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/theme.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/thumbnails.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/tooltip.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/type.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/utilities.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/variables.less
 create mode 100644 3rdparty/fmt/doc/bootstrap/wells.less
 create mode 100644 3rdparty/fmt/doc/build.py
 create mode 100644 3rdparty/fmt/doc/conf.py
 create mode 100644 3rdparty/fmt/doc/contents.rst
 create mode 100644 3rdparty/fmt/doc/fmt.less
 create mode 100644 3rdparty/fmt/doc/index.rst
 create mode 100644 3rdparty/fmt/doc/python-license.txt
 create mode 100644 3rdparty/fmt/doc/syntax.rst
 create mode 100644 3rdparty/fmt/doc/usage.rst
 create mode 100644 3rdparty/fmt/include/fmt/args.h
 create mode 100644 3rdparty/fmt/include/fmt/chrono.h
 create mode 100644 3rdparty/fmt/include/fmt/color.h
 create mode 100644 3rdparty/fmt/include/fmt/compile.h
 create mode 100644 3rdparty/fmt/include/fmt/core.h
 create mode 100644 3rdparty/fmt/include/fmt/format-inl.h
 create mode 100644 3rdparty/fmt/include/fmt/format.h
 create mode 100644 3rdparty/fmt/include/fmt/locale.h
 create mode 100644 3rdparty/fmt/include/fmt/os.h
 create mode 100644 3rdparty/fmt/include/fmt/ostream.h
 create mode 100644 3rdparty/fmt/include/fmt/printf.h
 create mode 100644 3rdparty/fmt/include/fmt/ranges.h
 create mode 100644 3rdparty/fmt/include/fmt/xchar.h
 create mode 100644 3rdparty/fmt/src/fmt.cc
 create mode 100644 3rdparty/fmt/src/format.cc
 create mode 100644 3rdparty/fmt/src/os.cc
 create mode 100644 3rdparty/fmt/support/Android.mk
 create mode 100644 3rdparty/fmt/support/AndroidManifest.xml
 create mode 100644 3rdparty/fmt/support/C++.sublime-syntax
 create mode 100644 3rdparty/fmt/support/README
 create mode 100644 3rdparty/fmt/support/Vagrantfile
 create mode 100644 3rdparty/fmt/support/appveyor-build.py
 create mode 100644 3rdparty/fmt/support/appveyor.yml
 create mode 100644 3rdparty/fmt/support/bazel/.bazelrc
 create mode 100644 3rdparty/fmt/support/bazel/.bazelversion
 create mode 100644 3rdparty/fmt/support/bazel/BUILD.bazel
 create mode 100644 3rdparty/fmt/support/bazel/README.md
 create mode 100644 3rdparty/fmt/support/bazel/WORKSPACE.bazel
 create mode 100644 3rdparty/fmt/support/build-docs.py
 create mode 100644 3rdparty/fmt/support/build.gradle
 create mode 100644 3rdparty/fmt/support/cmake/FindSetEnv.cmake
 create mode 100644 3rdparty/fmt/support/cmake/JoinPaths.cmake
 create mode 100644 3rdparty/fmt/support/cmake/cxx14.cmake
 create mode 100644 3rdparty/fmt/support/cmake/fmt-config.cmake.in
 create mode 100644 3rdparty/fmt/support/cmake/fmt.pc.in
 create mode 100644 3rdparty/fmt/support/compute-powers.py
 create mode 100644 3rdparty/fmt/support/docopt.py
 create mode 100644 3rdparty/fmt/support/manage.py
 create mode 100644 3rdparty/fmt/support/printable.py
 create mode 100644 3rdparty/fmt/support/rst2md.py
 create mode 100644 3rdparty/fmt/support/rtd/conf.py
 create mode 100644 3rdparty/fmt/support/rtd/index.rst
 create mode 100644 3rdparty/fmt/support/rtd/theme/layout.html
 create mode 100644 3rdparty/fmt/support/rtd/theme/theme.conf
 create mode 100644 3rdparty/fmt/test/CMakeLists.txt
 create mode 100644 3rdparty/fmt/test/add-subdirectory-test/CMakeLists.txt
 create mode 100644 3rdparty/fmt/test/add-subdirectory-test/main.cc
 create mode 100644 3rdparty/fmt/test/args-test.cc
 create mode 100644 3rdparty/fmt/test/assert-test.cc
 create mode 100644 3rdparty/fmt/test/chrono-test.cc
 create mode 100644 3rdparty/fmt/test/color-test.cc
 create mode 100644 3rdparty/fmt/test/compile-error-test/CMakeLists.txt
 create mode 100644 3rdparty/fmt/test/compile-fp-test.cc
 create mode 100644 3rdparty/fmt/test/compile-test.cc
 create mode 100644 3rdparty/fmt/test/core-test.cc
 create mode 100644 3rdparty/fmt/test/cuda-test/CMakeLists.txt
 create mode 100644 3rdparty/fmt/test/cuda-test/cpp14.cc
 create mode 100644 3rdparty/fmt/test/cuda-test/cuda-cpp14.cu
 create mode 100644 3rdparty/fmt/test/enforce-checks-test.cc
 create mode 100644 3rdparty/fmt/test/find-package-test/CMakeLists.txt
 create mode 100644 3rdparty/fmt/test/find-package-test/main.cc
 create mode 100644 3rdparty/fmt/test/format-impl-test.cc
 create mode 100644 3rdparty/fmt/test/format-test.cc
 create mode 100644 3rdparty/fmt/test/fuzzing/.gitignore
 create mode 100644 3rdparty/fmt/test/fuzzing/CMakeLists.txt
 create mode 100644 3rdparty/fmt/test/fuzzing/README.md
 create mode 100644 3rdparty/fmt/test/fuzzing/build.sh
 create mode 100644 3rdparty/fmt/test/fuzzing/chrono-duration.cc
 create mode 100644 3rdparty/fmt/test/fuzzing/chrono-timepoint.cc
 create mode 100644 3rdparty/fmt/test/fuzzing/float.cc
 create mode 100644 3rdparty/fmt/test/fuzzing/fuzzer-common.h
 create mode 100644 3rdparty/fmt/test/fuzzing/main.cc
 create mode 100644 3rdparty/fmt/test/fuzzing/named-arg.cc
 create mode 100644 3rdparty/fmt/test/fuzzing/one-arg.cc
 create mode 100644 3rdparty/fmt/test/fuzzing/two-args.cc
 create mode 100644 3rdparty/fmt/test/gtest-extra-test.cc
 create mode 100644 3rdparty/fmt/test/gtest-extra.cc
 create mode 100644 3rdparty/fmt/test/gtest-extra.h
 create mode 100644 3rdparty/fmt/test/gtest/.clang-format
 create mode 100644 3rdparty/fmt/test/gtest/CMakeLists.txt
 create mode 100644 3rdparty/fmt/test/gtest/gmock-gtest-all.cc
 create mode 100644 3rdparty/fmt/test/gtest/gmock/gmock.h
 create mode 100644 3rdparty/fmt/test/gtest/gtest/gtest-spi.h
 create mode 100644 3rdparty/fmt/test/gtest/gtest/gtest.h
 create mode 100644 3rdparty/fmt/test/header-only-test.cc
 create mode 100644 3rdparty/fmt/test/mock-allocator.h
 create mode 100644 3rdparty/fmt/test/module-test.cc
 create mode 100644 3rdparty/fmt/test/noexception-test.cc
 create mode 100644 3rdparty/fmt/test/os-test.cc
 create mode 100644 3rdparty/fmt/test/ostream-test.cc
 create mode 100644 3rdparty/fmt/test/posix-mock-test.cc
 create mode 100644 3rdparty/fmt/test/posix-mock.h
 create mode 100644 3rdparty/fmt/test/printf-test.cc
 create mode 100644 3rdparty/fmt/test/ranges-odr-test.cc
 create mode 100644 3rdparty/fmt/test/ranges-test.cc
 create mode 100644 3rdparty/fmt/test/scan-test.cc
 create mode 100644 3rdparty/fmt/test/scan.h
 create mode 100644 3rdparty/fmt/test/static-export-test/CMakeLists.txt
 create mode 100644 3rdparty/fmt/test/static-export-test/library.cc
 create mode 100644 3rdparty/fmt/test/static-export-test/main.cc
 create mode 100644 3rdparty/fmt/test/test-assert.h
 create mode 100644 3rdparty/fmt/test/test-main.cc
 create mode 100644 3rdparty/fmt/test/unicode-test.cc
 create mode 100644 3rdparty/fmt/test/util.cc
 create mode 100644 3rdparty/fmt/test/util.h
 create mode 100644 3rdparty/fmt/test/xchar-test.cc

diff --git a/3rdparty/fmt/.clang-format b/3rdparty/fmt/.clang-format
new file mode 100644
index 00000000..df55d340
--- /dev/null
+++ b/3rdparty/fmt/.clang-format
@@ -0,0 +1,8 @@
+# Run manually to reformat a file:
+# clang-format -i --style=file <file>
+Language: Cpp
+BasedOnStyle: Google
+IndentPPDirectives: AfterHash
+IndentCaseLabels: false
+AlwaysBreakTemplateDeclarations: false
+DerivePointerAlignment: false
diff --git a/3rdparty/fmt/.gitignore b/3rdparty/fmt/.gitignore
new file mode 100644
index 00000000..8a37cb98
--- /dev/null
+++ b/3rdparty/fmt/.gitignore
@@ -0,0 +1,37 @@
+.vscode/
+.vs/
+
+*.iml
+.idea/
+.externalNativeBuild/
+.gradle/
+gradle/
+gradlew*
+local.properties
+build/
+support/.cxx
+
+bin/
+/_CPack_Packages
+/CMakeScripts
+/doc/doxyxml
+/doc/html
+/doc/node_modules
+virtualenv
+/Testing
+/install_manifest.txt
+*~
+*.a
+*.so*
+*.xcodeproj
+*.zip
+cmake_install.cmake
+CPack*.cmake
+fmt-*.cmake
+CTestTestfile.cmake
+CMakeCache.txt
+CMakeFiles
+FMT.build
+Makefile
+run-msbuild.bat
+fmt.pc
diff --git a/3rdparty/fmt/CMakeLists.txt b/3rdparty/fmt/CMakeLists.txt
new file mode 100644
index 00000000..3bf80f80
--- /dev/null
+++ b/3rdparty/fmt/CMakeLists.txt
@@ -0,0 +1,415 @@
+cmake_minimum_required(VERSION 3.1...3.18)
+
+# Fallback for using newer policies on CMake <3.12.
+if(${CMAKE_VERSION} VERSION_LESS 3.12)
+  cmake_policy(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION})
+endif()
+
+# Determine if fmt is built as a subproject (using add_subdirectory)
+# or if it is the master project.
+if (NOT DEFINED FMT_MASTER_PROJECT)
+  set(FMT_MASTER_PROJECT OFF)
+  if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
+    set(FMT_MASTER_PROJECT ON)
+    message(STATUS "CMake version: ${CMAKE_VERSION}")
+  endif ()
+endif ()
+
+# Joins arguments and places the results in ${result_var}.
+function(join result_var)
+  set(result "")
+  foreach (arg ${ARGN})
+    set(result "${result}${arg}")
+  endforeach ()
+  set(${result_var} "${result}" PARENT_SCOPE)
+endfunction()
+
+function(enable_module target)
+  if (MSVC)
+    set(BMI ${CMAKE_CURRENT_BINARY_DIR}/${target}.ifc)
+    target_compile_options(${target}
+      PRIVATE /interface /ifcOutput ${BMI}
+      INTERFACE /reference fmt=${BMI})
+  endif ()
+  set_target_properties(${target} PROPERTIES ADDITIONAL_CLEAN_FILES ${BMI})
+  set_source_files_properties(${BMI} PROPERTIES GENERATED ON)
+endfunction()
+
+include(CMakeParseArguments)
+
+# Sets a cache variable with a docstring joined from multiple arguments:
+#   set(<variable> <value>... CACHE <type> <docstring>...)
+# This allows splitting a long docstring for readability.
+function(set_verbose)
+  # cmake_parse_arguments is broken in CMake 3.4 (cannot parse CACHE) so use
+  # list instead.
+  list(GET ARGN 0 var)
+  list(REMOVE_AT ARGN 0)
+  list(GET ARGN 0 val)
+  list(REMOVE_AT ARGN 0)
+  list(REMOVE_AT ARGN 0)
+  list(GET ARGN 0 type)
+  list(REMOVE_AT ARGN 0)
+  join(doc ${ARGN})
+  set(${var} ${val} CACHE ${type} ${doc})
+endfunction()
+
+# Set the default CMAKE_BUILD_TYPE to Release.
+# This should be done before the project command since the latter can set
+# CMAKE_BUILD_TYPE itself (it does so for nmake).
+if (FMT_MASTER_PROJECT AND NOT CMAKE_BUILD_TYPE)
+  set_verbose(CMAKE_BUILD_TYPE Release CACHE STRING
+              "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or "
+              "CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.")
+endif ()
+
+project(FMT CXX)
+include(GNUInstallDirs)
+set_verbose(FMT_INC_DIR ${CMAKE_INSTALL_INCLUDEDIR} CACHE STRING
+            "Installation directory for include files, a relative path that "
+            "will be joined with ${CMAKE_INSTALL_PREFIX} or an absolute path.")
+
+option(FMT_PEDANTIC "Enable extra warnings and expensive tests." OFF)
+option(FMT_WERROR "Halt the compilation with an error on compiler warnings."
+       OFF)
+
+# Options that control generation of various targets.
+option(FMT_DOC "Generate the doc target." ${FMT_MASTER_PROJECT})
+option(FMT_INSTALL "Generate the install target." ${FMT_MASTER_PROJECT})
+option(FMT_TEST "Generate the test target." ${FMT_MASTER_PROJECT})
+option(FMT_FUZZ "Generate the fuzz target." OFF)
+option(FMT_CUDA_TEST "Generate the cuda-test target." OFF)
+option(FMT_OS "Include core requiring OS (Windows/Posix) " ON)
+option(FMT_MODULE "Build a module instead of a traditional library." OFF)
+option(FMT_SYSTEM_HEADERS "Expose headers with marking them as system." OFF)
+
+set(FMT_CAN_MODULE OFF)
+if (CMAKE_CXX_STANDARD GREATER 17 AND
+    # msvc 16.10-pre4
+    MSVC AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 19.29.30035)
+  set(FMT_CAN_MODULE OFF)
+endif ()
+if (NOT FMT_CAN_MODULE)
+  set(FMT_MODULE OFF)
+  message(STATUS "Module support is disabled.")
+endif ()
+if (FMT_TEST AND FMT_MODULE)
+  # The tests require {fmt} to be compiled as traditional library
+  message(STATUS "Testing is incompatible with build mode 'module'.")
+endif ()
+set(FMT_SYSTEM_HEADERS_ATTRIBUTE "")
+if (FMT_SYSTEM_HEADERS)
+  set(FMT_SYSTEM_HEADERS_ATTRIBUTE SYSTEM)
+endif ()
+
+# Get version from core.h
+file(READ include/fmt/core.h core_h)
+if (NOT core_h MATCHES "FMT_VERSION ([0-9]+)([0-9][0-9])([0-9][0-9])")
+  message(FATAL_ERROR "Cannot get FMT_VERSION from core.h.")
+endif ()
+# Use math to skip leading zeros if any.
+math(EXPR CPACK_PACKAGE_VERSION_MAJOR ${CMAKE_MATCH_1})
+math(EXPR CPACK_PACKAGE_VERSION_MINOR ${CMAKE_MATCH_2})
+math(EXPR CPACK_PACKAGE_VERSION_PATCH ${CMAKE_MATCH_3})
+join(FMT_VERSION ${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.
+                 ${CPACK_PACKAGE_VERSION_PATCH})
+message(STATUS "Version: ${FMT_VERSION}")
+
+message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
+
+if (NOT CMAKE_RUNTIME_OUTPUT_DIRECTORY)
+  set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
+endif ()
+
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
+  "${CMAKE_CURRENT_SOURCE_DIR}/support/cmake")
+
+include(cxx14)
+include(CheckCXXCompilerFlag)
+include(JoinPaths)
+
+list(FIND CMAKE_CXX_COMPILE_FEATURES "cxx_variadic_templates" index)
+if (${index} GREATER -1)
+  # Use cxx_variadic_templates instead of more appropriate cxx_std_11 for
+  # compatibility with older CMake versions.
+  set(FMT_REQUIRED_FEATURES cxx_variadic_templates)
+endif ()
+message(STATUS "Required features: ${FMT_REQUIRED_FEATURES}")
+
+if (FMT_MASTER_PROJECT AND NOT DEFINED CMAKE_CXX_VISIBILITY_PRESET)
+  set_verbose(CMAKE_CXX_VISIBILITY_PRESET hidden CACHE STRING
+              "Preset for the export of private symbols")
+  set_property(CACHE CMAKE_CXX_VISIBILITY_PRESET PROPERTY STRINGS
+               hidden default)
+endif ()
+
+if (FMT_MASTER_PROJECT AND NOT DEFINED CMAKE_VISIBILITY_INLINES_HIDDEN)
+  set_verbose(CMAKE_VISIBILITY_INLINES_HIDDEN ON CACHE BOOL
+              "Whether to add a compile flag to hide symbols of inline functions")
+endif ()
+
+if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
+  set(PEDANTIC_COMPILE_FLAGS -pedantic-errors -Wall -Wextra -pedantic
+      -Wold-style-cast -Wundef
+      -Wredundant-decls -Wwrite-strings -Wpointer-arith
+      -Wcast-qual -Wformat=2 -Wmissing-include-dirs
+      -Wcast-align
+      -Wctor-dtor-privacy -Wdisabled-optimization
+      -Winvalid-pch -Woverloaded-virtual
+      -Wconversion -Wundef
+      -Wno-ctor-dtor-privacy -Wno-format-nonliteral)
+  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.6)
+      set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS}
+         -Wno-dangling-else -Wno-unused-local-typedefs)
+  endif ()
+  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
+      set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wdouble-promotion
+          -Wtrampolines -Wzero-as-null-pointer-constant -Wuseless-cast
+          -Wvector-operation-performance -Wsized-deallocation -Wshadow)
+  endif ()
+  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.0)
+      set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wshift-overflow=2
+          -Wnull-dereference -Wduplicated-cond)
+  endif ()
+  set(WERROR_FLAG -Werror)
+endif ()
+
+if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+  set(PEDANTIC_COMPILE_FLAGS -Wall -Wextra -pedantic -Wconversion -Wundef
+      -Wdeprecated -Wweak-vtables -Wshadow
+      -Wno-gnu-zero-variadic-macro-arguments)
+  check_cxx_compiler_flag(-Wzero-as-null-pointer-constant HAS_NULLPTR_WARNING)
+  if (HAS_NULLPTR_WARNING)
+    set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS}
+        -Wzero-as-null-pointer-constant)
+  endif ()
+  set(WERROR_FLAG -Werror)
+endif ()
+
+if (MSVC)
+  set(PEDANTIC_COMPILE_FLAGS /W3)
+  set(WERROR_FLAG /WX)
+endif ()
+
+if (FMT_MASTER_PROJECT AND CMAKE_GENERATOR MATCHES "Visual Studio")
+  # If Microsoft SDK is installed create script run-msbuild.bat that
+  # calls SetEnv.cmd to set up build environment and runs msbuild.
+  # It is useful when building Visual Studio projects with the SDK
+  # toolchain rather than Visual Studio.
+  include(FindSetEnv)
+  if (WINSDK_SETENV)
+    set(MSBUILD_SETUP "call \"${WINSDK_SETENV}\"")
+  endif ()
+  # Set FrameworkPathOverride to get rid of MSB3644 warnings.
+  join(netfxpath
+       "C:\\Program Files\\Reference Assemblies\\Microsoft\\Framework\\"
+       ".NETFramework\\v4.0")
+  file(WRITE run-msbuild.bat "
+    ${MSBUILD_SETUP}
+    ${CMAKE_MAKE_PROGRAM} -p:FrameworkPathOverride=\"${netfxpath}\" %*")
+endif ()
+
+set(strtod_l_headers stdlib.h)
+if (APPLE)
+  set(strtod_l_headers ${strtod_l_headers} xlocale.h)
+endif ()
+
+include(CheckSymbolExists)
+if (WIN32)
+  check_symbol_exists(_strtod_l "${strtod_l_headers}" HAVE_STRTOD_L)
+else ()
+  check_symbol_exists(strtod_l "${strtod_l_headers}" HAVE_STRTOD_L)
+endif ()
+
+function(add_headers VAR)
+  set(headers ${${VAR}})
+  foreach (header ${ARGN})
+    set(headers ${headers} include/fmt/${header})
+  endforeach()
+  set(${VAR} ${headers} PARENT_SCOPE)
+endfunction()
+
+# Define the fmt library, its includes and the needed defines.
+add_headers(FMT_HEADERS args.h chrono.h color.h compile.h core.h format.h
+                        format-inl.h locale.h os.h ostream.h printf.h ranges.h
+                        xchar.h)
+if (FMT_MODULE)
+  set(FMT_SOURCES src/fmt.cc)
+elseif (FMT_OS)
+  set(FMT_SOURCES src/format.cc src/os.cc)
+else()
+  set(FMT_SOURCES src/format.cc)
+endif ()
+
+add_library(fmt ${FMT_SOURCES} ${FMT_HEADERS} README.rst ChangeLog.rst)
+add_library(fmt::fmt ALIAS fmt)
+
+if (HAVE_STRTOD_L)
+  target_compile_definitions(fmt PUBLIC FMT_LOCALE)
+endif ()
+
+if (MINGW)
+  check_cxx_compiler_flag("-Wa,-mbig-obj" FMT_HAS_MBIG_OBJ)
+  if (${FMT_HAS_MBIG_OBJ})
+    target_compile_options(fmt PUBLIC "-Wa,-mbig-obj")
+  endif()
+endif ()
+
+if (FMT_WERROR)
+  target_compile_options(fmt PRIVATE ${WERROR_FLAG})
+endif ()
+if (FMT_PEDANTIC)
+  target_compile_options(fmt PRIVATE ${PEDANTIC_COMPILE_FLAGS})
+endif ()
+if (FMT_MODULE)
+  enable_module(fmt)
+endif ()
+
+target_compile_features(fmt INTERFACE ${FMT_REQUIRED_FEATURES})
+
+target_include_directories(fmt ${FMT_SYSTEM_HEADERS_ATTRIBUTE} PUBLIC
+  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
+  $<INSTALL_INTERFACE:${FMT_INC_DIR}>)
+
+set(FMT_DEBUG_POSTFIX d CACHE STRING "Debug library postfix.")
+
+set_target_properties(fmt PROPERTIES
+  VERSION ${FMT_VERSION} SOVERSION ${CPACK_PACKAGE_VERSION_MAJOR}
+  DEBUG_POSTFIX "${FMT_DEBUG_POSTFIX}")
+
+# Set FMT_LIB_NAME for pkg-config fmt.pc. We cannot use the OUTPUT_NAME target
+# property because it's not set by default.
+set(FMT_LIB_NAME fmt)
+if (CMAKE_BUILD_TYPE STREQUAL "Debug")
+  set(FMT_LIB_NAME ${FMT_LIB_NAME}${FMT_DEBUG_POSTFIX})
+endif ()
+
+if (BUILD_SHARED_LIBS)
+  if (UNIX AND NOT APPLE AND NOT ${CMAKE_SYSTEM_NAME} MATCHES "SunOS" AND
+      NOT EMSCRIPTEN)
+    # Fix rpmlint warning:
+    # unused-direct-shlib-dependency /usr/lib/libformat.so.1.1.0 /lib/libm.so.6.
+    target_link_libraries(fmt -Wl,--as-needed)
+  endif ()
+  target_compile_definitions(fmt PRIVATE FMT_EXPORT INTERFACE FMT_SHARED)
+endif ()
+if (FMT_SAFE_DURATION_CAST)
+  target_compile_definitions(fmt PUBLIC FMT_SAFE_DURATION_CAST)
+endif()
+
+add_library(fmt-header-only INTERFACE)
+add_library(fmt::fmt-header-only ALIAS fmt-header-only)
+
+target_compile_definitions(fmt-header-only INTERFACE FMT_HEADER_ONLY=1)
+target_compile_features(fmt-header-only INTERFACE ${FMT_REQUIRED_FEATURES})
+
+target_include_directories(fmt-header-only ${FMT_SYSTEM_HEADERS_ATTRIBUTE} INTERFACE
+  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
+  $<INSTALL_INTERFACE:${FMT_INC_DIR}>)
+
+# Install targets.
+if (FMT_INSTALL)
+  include(CMakePackageConfigHelpers)
+  set_verbose(FMT_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/fmt CACHE STRING
+              "Installation directory for cmake files, a relative path that "
+              "will be joined with ${CMAKE_INSTALL_PREFIX} or an absolute "
+              "path.")
+  set(version_config ${PROJECT_BINARY_DIR}/fmt-config-version.cmake)
+  set(project_config ${PROJECT_BINARY_DIR}/fmt-config.cmake)
+  set(pkgconfig ${PROJECT_BINARY_DIR}/fmt.pc)
+  set(targets_export_name fmt-targets)
+
+  set_verbose(FMT_LIB_DIR ${CMAKE_INSTALL_LIBDIR} CACHE STRING
+              "Installation directory for libraries, a relative path that "
+              "will be joined to ${CMAKE_INSTALL_PREFIX} or an absolute path.")
+
+  set_verbose(FMT_PKGCONFIG_DIR ${CMAKE_INSTALL_LIBDIR}/pkgconfig CACHE PATH
+              "Installation directory for pkgconfig (.pc) files, a relative "
+              "path that will be joined with ${CMAKE_INSTALL_PREFIX} or an "
+              "absolute path.")
+
+  # Generate the version, config and target files into the build directory.
+  write_basic_package_version_file(
+    ${version_config}
+    VERSION ${FMT_VERSION}
+    COMPATIBILITY AnyNewerVersion)
+
+  join_paths(libdir_for_pc_file "\${exec_prefix}" "${FMT_LIB_DIR}")
+  join_paths(includedir_for_pc_file "\${prefix}" "${FMT_INC_DIR}")
+
+  configure_file(
+    "${PROJECT_SOURCE_DIR}/support/cmake/fmt.pc.in"
+    "${pkgconfig}"
+    @ONLY)
+  configure_package_config_file(
+    ${PROJECT_SOURCE_DIR}/support/cmake/fmt-config.cmake.in
+    ${project_config}
+    INSTALL_DESTINATION ${FMT_CMAKE_DIR})
+
+  set(INSTALL_TARGETS fmt fmt-header-only)
+
+  # Install the library and headers.
+  install(TARGETS ${INSTALL_TARGETS} EXPORT ${targets_export_name}
+          LIBRARY DESTINATION ${FMT_LIB_DIR}
+          ARCHIVE DESTINATION ${FMT_LIB_DIR}
+          RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+
+  # Use a namespace because CMake provides better diagnostics for namespaced
+  # imported targets.
+  export(TARGETS ${INSTALL_TARGETS} NAMESPACE fmt::
+         FILE ${PROJECT_BINARY_DIR}/${targets_export_name}.cmake)
+
+  # Install version, config and target files.
+  install(
+    FILES ${project_config} ${version_config}
+    DESTINATION ${FMT_CMAKE_DIR})
+  install(EXPORT ${targets_export_name} DESTINATION ${FMT_CMAKE_DIR}
+          NAMESPACE fmt::)
+
+  install(FILES $<TARGET_PDB_FILE:${INSTALL_TARGETS}>
+          DESTINATION ${FMT_LIB_DIR} OPTIONAL)
+  install(FILES ${FMT_HEADERS} DESTINATION "${FMT_INC_DIR}/fmt")
+  install(FILES "${pkgconfig}" DESTINATION "${FMT_PKGCONFIG_DIR}")
+endif ()
+
+if (FMT_DOC)
+  add_subdirectory(doc)
+endif ()
+
+if (FMT_TEST)
+  enable_testing()
+  add_subdirectory(test)
+endif ()
+
+# Control fuzzing independent of the unit tests.
+if (FMT_FUZZ)
+  add_subdirectory(test/fuzzing)
+
+  # The FMT_FUZZ macro is used to prevent resource exhaustion in fuzzing
+  # mode and make fuzzing practically possible. It is similar to
+  # FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION but uses a different name to
+  # avoid interfering with fuzzing of projects that use {fmt}.
+  # See also https://llvm.org/docs/LibFuzzer.html#fuzzer-friendly-build-mode.
+  target_compile_definitions(fmt PUBLIC FMT_FUZZ)
+endif ()
+
+set(gitignore ${PROJECT_SOURCE_DIR}/.gitignore)
+if (FMT_MASTER_PROJECT AND EXISTS ${gitignore})
+  # Get the list of ignored files from .gitignore.
+  file (STRINGS ${gitignore} lines)
+  list(REMOVE_ITEM lines /doc/html)
+  foreach (line ${lines})
+    string(REPLACE "." "[.]" line "${line}")
+    string(REPLACE "*" ".*" line "${line}")
+    set(ignored_files ${ignored_files} "${line}$" "${line}/")
+  endforeach ()
+  set(ignored_files ${ignored_files}
+    /.git /breathe /format-benchmark sphinx/ .buildinfo .doctrees)
+
+  set(CPACK_SOURCE_GENERATOR ZIP)
+  set(CPACK_SOURCE_IGNORE_FILES ${ignored_files})
+  set(CPACK_SOURCE_PACKAGE_FILE_NAME fmt-${FMT_VERSION})
+  set(CPACK_PACKAGE_NAME fmt)
+  set(CPACK_RESOURCE_FILE_README ${PROJECT_SOURCE_DIR}/README.rst)
+  include(CPack)
+endif ()
diff --git a/3rdparty/fmt/CONTRIBUTING.md b/3rdparty/fmt/CONTRIBUTING.md
new file mode 100644
index 00000000..b82f1450
--- /dev/null
+++ b/3rdparty/fmt/CONTRIBUTING.md
@@ -0,0 +1,20 @@
+Contributing to {fmt}
+=====================
+
+By submitting a pull request or a patch, you represent that you have the right
+to license your contribution to the {fmt} project owners and the community,
+agree that your contributions are licensed under the {fmt} license, and agree
+to future changes to the licensing.
+
+All C++ code must adhere to [Google C++ Style Guide](
+https://google.github.io/styleguide/cppguide.html) with the following
+exceptions:
+
+* Exceptions are permitted
+* snake_case should be used instead of UpperCamelCase for function and type
+  names
+
+All documentation must adhere to the [Google Developer Documentation Style
+Guide](https://developers.google.com/style).
+
+Thanks for contributing!
diff --git a/3rdparty/fmt/ChangeLog.rst b/3rdparty/fmt/ChangeLog.rst
new file mode 100644
index 00000000..18b84c7d
--- /dev/null
+++ b/3rdparty/fmt/ChangeLog.rst
@@ -0,0 +1,4738 @@
+8.1.1 - 2022-01-06
+------------------
+
+* Restored ABI compatibility with version 8.0.x
+  (`#2695 <https://github.com/fmtlib/fmt/issues/2695>`_,
+  `#2696 <https://github.com/fmtlib/fmt/pull/2696>`_).
+  Thanks `@saraedum (Julian Rüth) <https://github.com/saraedum>`_.
+
+* Fixed chorno formatting on big endian systems
+  (`#2698 <https://github.com/fmtlib/fmt/issues/2698>`_,
+  `#2699 <https://github.com/fmtlib/fmt/pull/2699>`_).
+  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_ and
+  `@xvitaly (Vitaly Zaitsev) <https://github.com/xvitaly>`_.
+
+* Fixed a linkage error with mingw
+  (`#2691 <https://github.com/fmtlib/fmt/issues/2691>`_,
+  `#2692 <https://github.com/fmtlib/fmt/pull/2692>`_).
+  Thanks `@rbberger (Richard Berger) <https://github.com/rbberger>`_.
+
+8.1.0 - 2022-01-02
+------------------
+
+* Optimized chrono formatting
+  (`#2500 <https://github.com/fmtlib/fmt/pull/2500>`_,
+  `#2537 <https://github.com/fmtlib/fmt/pull/2537>`_,
+  `#2541 <https://github.com/fmtlib/fmt/issues/2541>`_,
+  `#2544 <https://github.com/fmtlib/fmt/pull/2544>`_,
+  `#2550 <https://github.com/fmtlib/fmt/pull/2550>`_,
+  `#2551 <https://github.com/fmtlib/fmt/pull/2551>`_,
+  `#2576 <https://github.com/fmtlib/fmt/pull/2576>`_,
+  `#2577 <https://github.com/fmtlib/fmt/issues/2577>`_,
+  `#2586 <https://github.com/fmtlib/fmt/pull/2586>`_,
+  `#2591 <https://github.com/fmtlib/fmt/pull/2591>`_,
+  `#2594 <https://github.com/fmtlib/fmt/pull/2594>`_,
+  `#2602 <https://github.com/fmtlib/fmt/pull/2602>`_,
+  `#2617 <https://github.com/fmtlib/fmt/pull/2617>`_,
+  `#2628 <https://github.com/fmtlib/fmt/issues/2628>`_,
+  `#2633 <https://github.com/fmtlib/fmt/pull/2633>`_,
+  `#2670 <https://github.com/fmtlib/fmt/issues/2670>`_,
+  `#2671 <https://github.com/fmtlib/fmt/pull/2671>`_).
+
+  Processing of some specifiers such as ``%z`` and ``%Y`` is now up to 10-20
+  times faster, for example on GCC 11 with libstdc++::
+
+    ----------------------------------------------------------------------------
+    Benchmark                                  Before             After
+    ----------------------------------------------------------------------------
+    FMTFormatter_z                             261 ns             26.3 ns
+    FMTFormatterCompile_z                      246 ns             11.6 ns
+    FMTFormatter_Y                             263 ns             26.1 ns
+    FMTFormatterCompile_Y                      244 ns             10.5 ns
+    ----------------------------------------------------------------------------
+
+  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_ and
+  `@toughengineer (Pavel Novikov) <https://github.com/toughengineer>`_.
+
+* Implemented subsecond formatting for chrono durations
+  (`#2623 <https://github.com/fmtlib/fmt/pull/2623>`_).
+  For example (`godbolt <https://godbolt.org/z/es7vWTETe>`__):
+
+  .. code:: c++
+
+     #include <fmt/chrono.h>
+
+     int main() {
+       fmt::print("{:%S}", std::chrono::milliseconds(1234));
+     }
+
+  prints "01.234".
+
+  Thanks `@matrackif <https://github.com/matrackif>`_.
+
+* Fixed handling of precision 0 when formatting chrono durations
+  (`#2587 <https://github.com/fmtlib/fmt/issues/2587>`_,
+  `#2588 <https://github.com/fmtlib/fmt/pull/2588>`_).
+  Thanks `@lukester1975 <https://github.com/lukester1975>`_.
+
+* Fixed an overflow on invalid inputs in the ``tm`` formatter
+  (`#2564 <https://github.com/fmtlib/fmt/pull/2564>`_).
+  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
+
+* Added ``fmt::group_digits`` that formats integers with a non-localized digit
+  separator (comma) for groups of three digits.
+  For example (`godbolt <https://godbolt.org/z/TxGxG9Poq>`__):
+
+  .. code:: c++
+
+     #include <fmt/format.h>
+
+     int main() {
+       fmt::print("{} dollars", fmt::group_digits(1000000));
+     }
+
+  prints "1,000,000 dollars".
+
+* Added support for faint, conceal, reverse and blink text styles
+  (`#2394 <https://github.com/fmtlib/fmt/pull/2394>`_):
+
+  https://user-images.githubusercontent.com/576385/147710227-c68f5317-f8fa-42c3-9123-7c4ba3c398cb.mp4
+
+  Thanks `@benit8 (Benoît Lormeau) <https://github.com/benit8>`_ and
+  `@data-man (Dmitry Atamanov) <https://github.com/data-man>`_.
+
+* Added experimental support for compile-time floating point formatting
+  (`#2426 <https://github.com/fmtlib/fmt/pull/2426>`_,
+  `#2470 <https://github.com/fmtlib/fmt/pull/2470>`_).
+  It is currently limited to the header-only mode.
+  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
+
+* Added UDL-based named argument support to compile-time format string checks
+  (`#2640 <https://github.com/fmtlib/fmt/issues/2640>`_,
+  `#2649 <https://github.com/fmtlib/fmt/pull/2649>`_).
+  For example (`godbolt <https://godbolt.org/z/ohGbbvonv>`__):
+
+  .. code:: c++
+
+     #include <fmt/format.h>
+
+     int main() {
+       using namespace fmt::literals;
+       fmt::print("{answer:s}", "answer"_a=42);
+     }
+
+  gives a compile-time error on compilers with C++20 ``consteval`` and non-type
+  template parameter support (gcc 10+) because ``s`` is not a valid format
+  specifier for an integer.
+
+  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
+
+* Implemented escaping of string range elements.
+  For example (`godbolt <https://godbolt.org/z/rKvM1vKf3>`__):
+
+  .. code:: c++
+
+     #include <fmt/ranges.h>
+     #include <vector>
+
+     int main() {
+       fmt::print("{}", std::vector<std::string>{"\naan"});
+     }
+
+  is now printed as::
+
+    ["\naan"]
+
+  instead of::
+  
+    ["
+    aan"]
+
+* Switched to JSON-like representation of maps and sets for consistency with
+  Python's ``str.format``.
+  For example (`godbolt <https://godbolt.org/z/seKjoY9W5>`__):
+
+  .. code:: c++
+
+     #include <fmt/ranges.h>
+     #include <map>
+
+     int main() {
+       fmt::print("{}", std::map<std::string, int>{{"answer", 42}});
+     }
+
+  is now printed as::
+
+    {"answer": 42}
+
+* Extended ``fmt::join`` to support C++20-only ranges
+  (`#2549 <https://github.com/fmtlib/fmt/pull/2549>`_).
+  Thanks `@BRevzin (Barry Revzin) <https://github.com/BRevzin>`_.
+
+* Optimized handling of non-const-iterable ranges and implemented initial
+  support for non-const-formattable types.
+
+* Disabled implicit conversions of scoped enums to integers that was
+  accidentally introduced in earlier versions
+  (`#1841 <https://github.com/fmtlib/fmt/pull/1841>`_).
+
+* Deprecated implicit conversion of ``[const] signed char*`` and 
+  ``[const] unsigned char*`` to C strings.
+
+* Deprecated ``_format``, a legacy UDL-based format API
+  (`#2646 <https://github.com/fmtlib/fmt/pull/2646>`_).
+  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
+
+* Marked ``format``, ``formatted_size`` and ``to_string`` as ``[[nodiscard]]``
+  (`#2612 <https://github.com/fmtlib/fmt/pull/2612>`_).
+  `@0x8000-0000 (Florin Iucha) <https://github.com/0x8000-0000>`_.
+
+* Added missing diagnostic when trying to format function and member pointers
+  as well as objects convertible to pointers which is explicitly disallowed
+  (`#2598 <https://github.com/fmtlib/fmt/issues/2598>`_,
+  `#2609 <https://github.com/fmtlib/fmt/pull/2609>`_,
+  `#2610 <https://github.com/fmtlib/fmt/pull/2610>`_).
+  Thanks `@AlexGuteniev (Alex Guteniev) <https://github.com/AlexGuteniev>`_.
+
+* Optimized writing to a contiguous buffer with ``format_to_n``
+  (`#2489 <https://github.com/fmtlib/fmt/pull/2489>`_).
+  Thanks `@Roman-Koshelev <https://github.com/Roman-Koshelev>`_.
+
+* Optimized writing to non-``char`` buffers
+  (`#2477 <https://github.com/fmtlib/fmt/pull/2477>`_).
+  Thanks `@Roman-Koshelev <https://github.com/Roman-Koshelev>`_.
+
+* Decimal point is now localized when using the ``L`` specifier.
+
+* Improved floating point formatter implementation
+  (`#2498 <https://github.com/fmtlib/fmt/pull/2498>`_,
+  `#2499 <https://github.com/fmtlib/fmt/pull/2499>`_).
+  Thanks `@Roman-Koshelev <https://github.com/Roman-Koshelev>`_.
+
+* Fixed handling of very large precision in fixed format
+  (`#2616 <https://github.com/fmtlib/fmt/pull/2616>`_).
+
+* Made a table of cached powers used in FP formatting static
+  (`#2509 <https://github.com/fmtlib/fmt/pull/2509>`_).
+  Thanks `@jk-jeon (Junekey Jeon) <https://github.com/jk-jeon>`_.
+
+* Resolved a lookup ambiguity with C++20 format-related functions due to ADL
+  (`#2639 <https://github.com/fmtlib/fmt/issues/2639>`_,
+  `#2641 <https://github.com/fmtlib/fmt/pull/2641>`_).
+  Thanks `@mkurdej (Marek Kurdej) <https://github.com/mkurdej>`_.
+
+* Removed unnecessary inline namespace qualification
+  (`#2642 <https://github.com/fmtlib/fmt/issues/2642>`_,
+  `#2643 <https://github.com/fmtlib/fmt/pull/2643>`_).
+  Thanks `@mkurdej (Marek Kurdej) <https://github.com/mkurdej>`_.
+
+* Implemented argument forwarding in ``format_to_n``
+  (`#2462 <https://github.com/fmtlib/fmt/issues/2462>`_,
+  `#2463 <https://github.com/fmtlib/fmt/pull/2463>`_).
+  Thanks `@owent (WenTao Ou) <https://github.com/owent>`_.
+
+* Fixed handling of implicit conversions in ``fmt::to_string`` and format string
+  compilation (`#2565 <https://github.com/fmtlib/fmt/issues/2565>`_).
+
+* Changed the default access mode of files created by ``fmt::output_file`` to
+  ``-rw-r--r--`` for consistency with ``fopen``
+  (`#2530 <https://github.com/fmtlib/fmt/issues/2530>`_).
+
+* Make ``fmt::ostream::flush`` public
+  (`#2435 <https://github.com/fmtlib/fmt/issues/2435>`_).
+
+* Improved C++14/17 attribute detection
+  (`#2615 <https://github.com/fmtlib/fmt/pull/2615>`_).
+  Thanks `@AlexGuteniev (Alex Guteniev) <https://github.com/AlexGuteniev>`_.
+
+* Improved ``consteval`` detection for MSVC
+  (`#2559 <https://github.com/fmtlib/fmt/pull/2559>`_).
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
+
+* Improved documentation
+  (`#2406 <https://github.com/fmtlib/fmt/issues/2406>`_,
+  `#2446 <https://github.com/fmtlib/fmt/pull/2446>`_,
+  `#2493 <https://github.com/fmtlib/fmt/issues/2493>`_,
+  `#2513 <https://github.com/fmtlib/fmt/issues/2513>`_,
+  `#2515 <https://github.com/fmtlib/fmt/pull/2515>`_,
+  `#2522 <https://github.com/fmtlib/fmt/issues/2522>`_,
+  `#2562 <https://github.com/fmtlib/fmt/pull/2562>`_,
+  `#2575 <https://github.com/fmtlib/fmt/pull/2575>`_,
+  `#2606 <https://github.com/fmtlib/fmt/pull/2606>`_,
+  `#2620 <https://github.com/fmtlib/fmt/pull/2620>`_,
+  `#2676 <https://github.com/fmtlib/fmt/issues/2676>`_).
+  Thanks `@sobolevn (Nikita Sobolev) <https://github.com/sobolevn>`_,
+  `@UnePierre (Max FERGER) <https://github.com/UnePierre>`_,
+  `@zhsj <https://github.com/zhsj>`_,
+  `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_,
+  `@ericcurtin (Eric Curtin) <https://github.com/ericcurtin>`_,
+  `@Lounarok <https://github.com/Lounarok>`_.
+
+* Improved fuzzers and added a fuzzer for chrono timepoint formatting
+  (`#2461 <https://github.com/fmtlib/fmt/pull/2461>`_,
+  `#2469 <https://github.com/fmtlib/fmt/pull/2469>`_).
+  `@pauldreik (Paul Dreik) <https://github.com/pauldreik>`_,
+
+* Added the ``FMT_SYSTEM_HEADERS`` CMake option setting which marks {fmt}'s
+  headers as system. It can be used to suppress warnings
+  (`#2644 <https://github.com/fmtlib/fmt/issues/2644>`_,
+  `#2651 <https://github.com/fmtlib/fmt/pull/2651>`_).
+  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
+
+* Added the Bazel build system support
+  (`#2505 <https://github.com/fmtlib/fmt/pull/2505>`_,
+  `#2516 <https://github.com/fmtlib/fmt/pull/2516>`_).
+  Thanks `@Vertexwahn <https://github.com/Vertexwahn>`_.
+
+* Improved build configuration and tests
+  (`#2437 <https://github.com/fmtlib/fmt/issues/2437>`_,
+  `#2558 <https://github.com/fmtlib/fmt/pull/2558>`_,
+  `#2648 <https://github.com/fmtlib/fmt/pull/2648>`_,
+  `#2650 <https://github.com/fmtlib/fmt/pull/2650>`_,
+  `#2663 <https://github.com/fmtlib/fmt/pull/2663>`_,
+  `#2677 <https://github.com/fmtlib/fmt/pull/2677>`_).
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
+  `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_,
+  `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
+
+* Fixed various warnings and compilation issues
+  (`#2353 <https://github.com/fmtlib/fmt/pull/2353>`_,
+  `#2356 <https://github.com/fmtlib/fmt/pull/2356>`_,
+  `#2399 <https://github.com/fmtlib/fmt/pull/2399>`_,
+  `#2408 <https://github.com/fmtlib/fmt/issues/2408>`_,
+  `#2414 <https://github.com/fmtlib/fmt/pull/2414>`_,
+  `#2427 <https://github.com/fmtlib/fmt/pull/2427>`_,
+  `#2432 <https://github.com/fmtlib/fmt/pull/2432>`_,
+  `#2442 <https://github.com/fmtlib/fmt/pull/2442>`_,
+  `#2434 <https://github.com/fmtlib/fmt/pull/2434>`_,
+  `#2439 <https://github.com/fmtlib/fmt/issues/2439>`_,
+  `#2447 <https://github.com/fmtlib/fmt/pull/2447>`_,
+  `#2450 <https://github.com/fmtlib/fmt/pull/2450>`_,
+  `#2455 <https://github.com/fmtlib/fmt/issues/2455>`_,
+  `#2465 <https://github.com/fmtlib/fmt/issues/2465>`_,
+  `#2472 <https://github.com/fmtlib/fmt/issues/2472>`_,
+  `#2474 <https://github.com/fmtlib/fmt/issues/2474>`_,
+  `#2476 <https://github.com/fmtlib/fmt/pull/2476>`_,
+  `#2478 <https://github.com/fmtlib/fmt/issues/2478>`_,
+  `#2479 <https://github.com/fmtlib/fmt/issues/2479>`_,
+  `#2481 <https://github.com/fmtlib/fmt/issues/2481>`_,
+  `#2482 <https://github.com/fmtlib/fmt/pull/2482>`_,
+  `#2483 <https://github.com/fmtlib/fmt/pull/2483>`_,
+  `#2490 <https://github.com/fmtlib/fmt/issues/2490>`_,
+  `#2491 <https://github.com/fmtlib/fmt/pull/2491>`_,
+  `#2510 <https://github.com/fmtlib/fmt/pull/2510>`_,
+  `#2518 <https://github.com/fmtlib/fmt/pull/2518>`_,
+  `#2528 <https://github.com/fmtlib/fmt/issues/2528>`_,
+  `#2529 <https://github.com/fmtlib/fmt/pull/2529>`_,
+  `#2539 <https://github.com/fmtlib/fmt/pull/2539>`_,
+  `#2540 <https://github.com/fmtlib/fmt/issues/2540>`_,
+  `#2545 <https://github.com/fmtlib/fmt/pull/2545>`_,
+  `#2555 <https://github.com/fmtlib/fmt/pull/2555>`_,
+  `#2557 <https://github.com/fmtlib/fmt/issues/2557>`_,
+  `#2570 <https://github.com/fmtlib/fmt/issues/2570>`_,
+  `#2573 <https://github.com/fmtlib/fmt/pull/2573>`_,
+  `#2582 <https://github.com/fmtlib/fmt/pull/2582>`_,
+  `#2605 <https://github.com/fmtlib/fmt/issues/2605>`_,
+  `#2611 <https://github.com/fmtlib/fmt/pull/2611>`_,
+  `#2647 <https://github.com/fmtlib/fmt/pull/2647>`_,
+  `#2627 <https://github.com/fmtlib/fmt/issues/2627>`_,
+  `#2630 <https://github.com/fmtlib/fmt/pull/2630>`_,
+  `#2635 <https://github.com/fmtlib/fmt/issues/2635>`_,
+  `#2638 <https://github.com/fmtlib/fmt/issues/2638>`_,
+  `#2653 <https://github.com/fmtlib/fmt/issues/2653>`_,
+  `#2654 <https://github.com/fmtlib/fmt/issues/2654>`_,
+  `#2661 <https://github.com/fmtlib/fmt/issues/2661>`_,
+  `#2664 <https://github.com/fmtlib/fmt/pull/2664>`_,
+  `#2684 <https://github.com/fmtlib/fmt/pull/2684>`_).
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
+  `@mwinterb <https://github.com/mwinterb>`_,
+  `@cdacamar (Cameron DaCamara) <https://github.com/cdacamar>`_,
+  `@TrebledJ (Johnathan) <https://github.com/TrebledJ>`_,
+  `@bodomartin (brm) <https://github.com/bodomartin>`_,
+  `@cquammen (Cory Quammen) <https://github.com/cquammen>`_,
+  `@white238 (Chris White) <https://github.com/white238>`_,
+  `@mmarkeloff (Max) <https://github.com/mmarkeloff>`_,
+  `@palacaze (Pierre-Antoine Lacaze) <https://github.com/palacaze>`_,
+  `@jcelerier (Jean-Michaël Celerier) <https://github.com/jcelerier>`_,
+  `@mborn-adi (Mathias Born) <https://github.com/mborn-adi>`_,
+  `@BrukerJWD (Jonathan W) <https://github.com/BrukerJWD>`_,
+  `@spyridon97 (Spiros Tsalikis) <https://github.com/spyridon97>`_,
+  `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_,
+  `@oliverlee (Oliver Lee) <https://github.com/oliverlee>`_,
+  `@joshessman-llnl (Josh Essman) <https://github.com/joshessman-llnl>`_,
+  `@akohlmey (Axel Kohlmeyer) <https://github.com/akohlmey>`_,
+  `@timkalu <https://github.com/timkalu>`_,
+  `@olupton (Olli Lupton) <https://github.com/olupton>`_,
+  `@Acretock <https://github.com/Acretock>`_,
+  `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_,
+  `@andrewcorrigan (Andrew Corrigan) <https://github.com/andrewcorrigan>`_,
+  `@lucpelletier <https://github.com/lucpelletier>`_,
+  `@HazardyKnusperkeks (Björn Schäpers) <https://github.com/HazardyKnusperkeks>`_.
+
+8.0.1 - 2021-07-02
+------------------
+
+* Fixed the version number in the inline namespace
+  (`#2374 <https://github.com/fmtlib/fmt/issues/2374>`_).
+
+* Added a missing presentation type check for ``std::string``
+  (`#2402 <https://github.com/fmtlib/fmt/issues/2402>`_).
+
+* Fixed a linkage error when mixing code built with clang and gcc
+  (`#2377 <https://github.com/fmtlib/fmt/issues/2377>`_).
+
+* Fixed documentation issues
+  (`#2396 <https://github.com/fmtlib/fmt/pull/2396>`_,
+  `#2403 <https://github.com/fmtlib/fmt/issues/2403>`_,
+  `#2406 <https://github.com/fmtlib/fmt/issues/2406>`_).
+  Thanks `@mkurdej (Marek Kurdej) <https://github.com/mkurdej>`_.
+
+* Removed dead code in FP formatter (
+  `#2398 <https://github.com/fmtlib/fmt/pull/2398>`_).
+  Thanks `@javierhonduco (Javier Honduvilla Coto)
+  <https://github.com/javierhonduco>`_.
+
+* Fixed various warnings and compilation issues
+  (`#2351 <https://github.com/fmtlib/fmt/issues/2351>`_,
+  `#2359 <https://github.com/fmtlib/fmt/issues/2359>`_,
+  `#2365 <https://github.com/fmtlib/fmt/pull/2365>`_,
+  `#2368 <https://github.com/fmtlib/fmt/issues/2368>`_,
+  `#2370 <https://github.com/fmtlib/fmt/pull/2370>`_,
+  `#2376 <https://github.com/fmtlib/fmt/pull/2376>`_,
+  `#2381 <https://github.com/fmtlib/fmt/pull/2381>`_,
+  `#2382 <https://github.com/fmtlib/fmt/pull/2382>`_,
+  `#2386 <https://github.com/fmtlib/fmt/issues/2386>`_,
+  `#2389 <https://github.com/fmtlib/fmt/pull/2389>`_,
+  `#2395 <https://github.com/fmtlib/fmt/pull/2395>`_,
+  `#2397 <https://github.com/fmtlib/fmt/pull/2397>`_,
+  `#2400 <https://github.com/fmtlib/fmt/issues/2400>`_,
+  `#2401 <https://github.com/fmtlib/fmt/issues/2401>`_,
+  `#2407 <https://github.com/fmtlib/fmt/pull/2407>`_).
+  Thanks `@zx2c4 (Jason A. Donenfeld) <https://github.com/zx2c4>`_,
+  `@AidanSun05 (Aidan Sun) <https://github.com/AidanSun05>`_,
+  `@mattiasljungstrom (Mattias Ljungström)
+  <https://github.com/mattiasljungstrom>`_,
+  `@joemmett (Jonathan Emmett) <https://github.com/joemmett>`_,
+  `@erengy (Eren Okka) <https://github.com/erengy>`_,
+  `@patlkli (Patrick Geltinger) <https://github.com/patlkli>`_,
+  `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
+  `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
+
+8.0.0 - 2021-06-21
+------------------
+
+* Enabled compile-time format string checks by default.
+  For example (`godbolt <https://godbolt.org/z/sMxcohGjz>`__):
+
+  .. code:: c++
+
+     #include <fmt/core.h>
+
+     int main() {
+       fmt::print("{:d}", "I am not a number");
+     }
+
+  gives a compile-time error on compilers with C++20 ``consteval`` support
+  (gcc 10+, clang 11+) because ``d`` is not a valid format specifier for a
+  string.
+
+  To pass a runtime string wrap it in ``fmt::runtime``:
+
+  .. code:: c++
+
+     fmt::print(fmt::runtime("{:d}"), "I am not a number");
+
+* Added compile-time formatting
+  (`#2019 <https://github.com/fmtlib/fmt/pull/2019>`_,
+  `#2044 <https://github.com/fmtlib/fmt/pull/2044>`_,
+  `#2056 <https://github.com/fmtlib/fmt/pull/2056>`_,
+  `#2072 <https://github.com/fmtlib/fmt/pull/2072>`_,
+  `#2075 <https://github.com/fmtlib/fmt/pull/2075>`_,
+  `#2078 <https://github.com/fmtlib/fmt/issues/2078>`_,
+  `#2129 <https://github.com/fmtlib/fmt/pull/2129>`_,
+  `#2326 <https://github.com/fmtlib/fmt/pull/2326>`_).
+  For example (`godbolt <https://godbolt.org/z/Mxx9d89jM>`__):
+
+  .. code:: c++
+
+     #include <fmt/compile.h>
+
+     consteval auto compile_time_itoa(int value) -> std::array<char, 10> {
+       auto result = std::array<char, 10>();
+       fmt::format_to(result.data(), FMT_COMPILE("{}"), value);
+       return result;
+     }
+
+     constexpr auto answer = compile_time_itoa(42);
+
+  Most of the formatting functionality is available at compile time with a
+  notable exception of floating-point numbers and pointers.
+  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
+
+* Optimized handling of format specifiers during format string compilation.
+  For example, hexadecimal formatting (``"{:x}"``) is now 3-7x faster than
+  before when using ``format_to`` with format string compilation and a
+  stack-allocated buffer (`#1944 <https://github.com/fmtlib/fmt/issues/1944>`_).
+
+  Before (7.1.3)::
+
+    ----------------------------------------------------------------------------
+    Benchmark                                  Time             CPU   Iterations
+    ----------------------------------------------------------------------------
+    FMTCompileOld/0                         15.5 ns         15.5 ns     43302898
+    FMTCompileOld/42                        16.6 ns         16.6 ns     43278267
+    FMTCompileOld/273123                    18.7 ns         18.6 ns     37035861
+    FMTCompileOld/9223372036854775807       19.4 ns         19.4 ns     35243000
+    ----------------------------------------------------------------------------
+
+  After (8.x)::
+
+    ----------------------------------------------------------------------------
+    Benchmark                                  Time             CPU   Iterations
+    ----------------------------------------------------------------------------
+    FMTCompileNew/0                         1.99 ns         1.99 ns    360523686
+    FMTCompileNew/42                        2.33 ns         2.33 ns    279865664
+    FMTCompileNew/273123                    3.72 ns         3.71 ns    190230315
+    FMTCompileNew/9223372036854775807       5.28 ns         5.26 ns    130711631
+    ----------------------------------------------------------------------------
+
+  It is even faster than ``std::to_chars`` from libc++ compiled with clang on
+  macOS::
+
+    ----------------------------------------------------------------------------
+    Benchmark                                  Time             CPU   Iterations
+    ----------------------------------------------------------------------------
+    ToChars/0                               4.42 ns         4.41 ns    160196630
+    ToChars/42                              5.00 ns         4.98 ns    140735201
+    ToChars/273123                          7.26 ns         7.24 ns     95784130
+    ToChars/9223372036854775807             8.77 ns         8.75 ns     75872534
+    ----------------------------------------------------------------------------
+
+  In other cases, especially involving ``std::string`` construction, the
+  speed up is usually lower because handling format specifiers takes a smaller
+  fraction of the total time.
+
+* Added the ``_cf`` user-defined literal to represent a compiled format string.
+  It can be used instead of the ``FMT_COMPILE`` macro
+  (`#2043 <https://github.com/fmtlib/fmt/pull/2043>`_,
+  `#2242 <https://github.com/fmtlib/fmt/pull/2242>`_):
+
+  .. code:: c++
+
+     #include <fmt/compile.h>
+
+     using namespace fmt::literals;
+     auto s = fmt::format(FMT_COMPILE("{}"), 42); // 🙁 not modern
+     auto s = fmt::format("{}"_cf, 42);           // 🙂 modern as hell
+
+  It requires compiler support for class types in non-type template parameters
+  (a C++20 feature) which is available in GCC 9.3+.
+  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
+
+* Format string compilation now requires ``format`` functions of ``formatter``
+  specializations for user-defined types to be ``const``:
+
+  .. code:: c++
+
+     template <> struct fmt::formatter<my_type>: formatter<string_view> {
+       template <typename FormatContext>
+       auto format(my_type obj, FormatContext& ctx) const {  // Note const here.
+         // ...
+       }
+     };
+
+* Added UDL-based named argument support to format string compilation
+  (`#2243 <https://github.com/fmtlib/fmt/pull/2243>`_,
+  `#2281 <https://github.com/fmtlib/fmt/pull/2281>`_). For example:
+
+  .. code:: c++
+
+     #include <fmt/compile.h>
+
+     using namespace fmt::literals;
+     auto s = fmt::format(FMT_COMPILE("{answer}"), "answer"_a = 42);
+
+  Here the argument named "answer" is resolved at compile time with no
+  runtime overhead.
+  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
+
+* Added format string compilation support to ``fmt::print``
+  (`#2280 <https://github.com/fmtlib/fmt/issues/2280>`_,
+  `#2304 <https://github.com/fmtlib/fmt/pull/2304>`_).
+  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
+
+* Added initial support for compiling {fmt} as a C++20 module
+  (`#2235 <https://github.com/fmtlib/fmt/pull/2235>`_,
+  `#2240 <https://github.com/fmtlib/fmt/pull/2240>`_,
+  `#2260 <https://github.com/fmtlib/fmt/pull/2260>`_,
+  `#2282 <https://github.com/fmtlib/fmt/pull/2282>`_,
+  `#2283 <https://github.com/fmtlib/fmt/pull/2283>`_,
+  `#2288 <https://github.com/fmtlib/fmt/pull/2288>`_,
+  `#2298 <https://github.com/fmtlib/fmt/pull/2298>`_,
+  `#2306 <https://github.com/fmtlib/fmt/pull/2306>`_,
+  `#2307 <https://github.com/fmtlib/fmt/pull/2307>`_,
+  `#2309 <https://github.com/fmtlib/fmt/pull/2309>`_,
+  `#2318 <https://github.com/fmtlib/fmt/pull/2318>`_,
+  `#2324 <https://github.com/fmtlib/fmt/pull/2324>`_,
+  `#2332 <https://github.com/fmtlib/fmt/pull/2332>`_,
+  `#2340 <https://github.com/fmtlib/fmt/pull/2340>`_).
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
+
+* Made symbols private by default reducing shared library size
+  (`#2301 <https://github.com/fmtlib/fmt/pull/2301>`_). For example there was
+  a ~15% reported reduction on one platform.
+  Thanks `@sergiud (Sergiu Deitsch) <https://github.com/sergiud>`_.
+
+* Optimized includes making the result of preprocessing ``fmt/format.h``
+  ~20% smaller with libstdc++/C++20 and slightly improving build times
+  (`#1998 <https://github.com/fmtlib/fmt/issues/1998>`_).
+
+* Added support of ranges with non-const ``begin`` / ``end``
+  (`#1953 <https://github.com/fmtlib/fmt/pull/1953>`_).
+  Thanks `@kitegi (sarah) <https://github.com/kitegi>`_.
+
+* Added support of ``std::byte`` and other formattable types to ``fmt::join``
+  (`#1981 <https://github.com/fmtlib/fmt/issues/1981>`_,
+  `#2040 <https://github.com/fmtlib/fmt/issues/2040>`_,
+  `#2050 <https://github.com/fmtlib/fmt/pull/2050>`_,
+  `#2262 <https://github.com/fmtlib/fmt/issues/2262>`_). For example:
+
+  .. code:: c++
+
+     #include <fmt/format.h>
+     #include <cstddef>
+     #include <vector>
+
+     int main() {
+       auto bytes = std::vector{std::byte(4), std::byte(2)};
+       fmt::print("{}", fmt::join(bytes, ""));
+     }
+
+  prints "42".
+
+  Thanks `@kamibo (Camille Bordignon) <https://github.com/kamibo>`_.
+
+* Implemented the default format for ``std::chrono::system_clock``
+  (`#2319 <https://github.com/fmtlib/fmt/issues/2319>`_,
+  `#2345 <https://github.com/fmtlib/fmt/pull/2345>`_). For example:
+
+  .. code:: c++
+
+     #include <fmt/chrono.h>
+
+     int main() {
+       fmt::print("{}", std::chrono::system_clock::now());
+     }
+
+  prints "2021-06-18 15:22:00" (the output depends on the current date and
+  time). Thanks `@sunmy2019 <https://github.com/sunmy2019>`_.
+
+* Made more chrono specifiers locale independent by default. Use the ``'L'``
+  specifier to get localized formatting. For example:
+
+  .. code:: c++
+
+     #include <fmt/chrono.h>
+
+     int main() {
+       std::locale::global(std::locale("ru_RU.UTF-8"));
+       auto monday = std::chrono::weekday(1);
+       fmt::print("{}\n", monday);   // prints "Mon"
+       fmt::print("{:L}\n", monday); // prints "пн"
+     }
+
+* Improved locale handling in chrono formatting
+  (`#2337 <https://github.com/fmtlib/fmt/issues/2337>`_,
+  `#2349 <https://github.com/fmtlib/fmt/pull/2349>`_,
+  `#2350 <https://github.com/fmtlib/fmt/pull/2350>`_).
+  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
+
+* Deprecated ``fmt/locale.h`` moving the formatting functions that take a
+  locale to ``fmt/format.h`` (``char``) and ``fmt/xchar`` (other overloads).
+  This doesn't introduce a dependency on ``<locale>`` so there is virtually no
+  compile time effect.
+
+* Deprecated an undocumented ``format_to`` overload that takes
+  ``basic_memory_buffer``.
+
+* Made parameter order in ``vformat_to`` consistent with ``format_to``
+  (`#2327 <https://github.com/fmtlib/fmt/issues/2327>`_).
+
+* Added support for time points with arbitrary durations
+  (`#2208 <https://github.com/fmtlib/fmt/issues/2208>`_). For example:
+
+  .. code:: c++
+
+     #include <fmt/chrono.h>
+
+     int main() {
+       using tp = std::chrono::time_point<
+         std::chrono::system_clock, std::chrono::seconds>;
+       fmt::print("{:%S}", tp(std::chrono::seconds(42)));
+     }
+
+  prints "42".
+
+* Formatting floating-point numbers no longer produces trailing zeros by default
+  for consistency with ``std::format``. For example:
+
+  .. code:: c++
+
+     #include <fmt/core.h>
+
+     int main() {
+       fmt::print("{0:.3}", 1.1);
+     }
+
+  prints "1.1". Use the ``'#'`` specifier to keep trailing zeros.
+
+* Dropped a limit on the number of elements in a range and replaced ``{}`` with
+  ``[]`` as range delimiters for consistency with Python's ``str.format``.
+
+* The ``'L'`` specifier for locale-specific numeric formatting can now be
+  combined with presentation specifiers as in ``std::format``. For example:
+
+  .. code:: c++
+
+     #include <fmt/core.h>
+     #include <locale>
+
+     int main() {
+       std::locale::global(std::locale("fr_FR.UTF-8"));
+       fmt::print("{0:.2Lf}", 0.42);
+     }
+
+  prints "0,42". The deprecated ``'n'`` specifier has been removed.
+
+* Made the ``0`` specifier ignored for infinity and NaN
+  (`#2305 <https://github.com/fmtlib/fmt/issues/2305>`_,
+  `#2310 <https://github.com/fmtlib/fmt/pull/2310>`_).
+  Thanks `@Liedtke (Matthias Liedtke) <https://github.com/Liedtke>`_.
+
+* Made the hexfloat formatting use the right alignment by default
+  (`#2308 <https://github.com/fmtlib/fmt/issues/2308>`_,
+  `#2317 <https://github.com/fmtlib/fmt/pull/2317>`_).
+  Thanks `@Liedtke (Matthias Liedtke) <https://github.com/Liedtke>`_.
+
+* Removed the deprecated numeric alignment (``'='``). Use the ``'0'`` specifier
+  instead.
+
+* Removed the deprecated ``fmt/posix.h`` header that has been replaced with
+  ``fmt/os.h``.
+
+* Removed the deprecated ``format_to_n_context``, ``format_to_n_args`` and
+  ``make_format_to_n_args``. They have been replaced with ``format_context``,
+  ``format_args` and ``make_format_args`` respectively.
+
+* Moved ``wchar_t``-specific functions and types to ``fmt/xchar.h``.
+  You can define ``FMT_DEPRECATED_INCLUDE_XCHAR`` to automatically include
+  ``fmt/xchar.h`` from ``fmt/format.h`` but this will be disabled in the next
+  major release.
+
+* Fixed handling of the ``'+'`` specifier in localized formatting
+  (`#2133 <https://github.com/fmtlib/fmt/issues/2133>`_).
+
+* Added support for the ``'s'`` format specifier that gives textual
+  representation of ``bool``
+  (`#2094 <https://github.com/fmtlib/fmt/issues/2094>`_,
+  `#2109 <https://github.com/fmtlib/fmt/pull/2109>`_). For example:
+
+  .. code:: c++
+
+     #include <fmt/core.h>
+
+     int main() {
+       fmt::print("{:s}", true);
+     }
+
+  prints "true".
+  Thanks `@powercoderlol (Ivan Polyakov) <https://github.com/powercoderlol>`_.
+
+* Made ``fmt::ptr`` work with function pointers
+  (`#2131 <https://github.com/fmtlib/fmt/pull/2131>`_). For example:
+
+  .. code:: c++
+
+     #include <fmt/format.h>
+
+     int main() {
+       fmt::print("My main: {}\n", fmt::ptr(main));
+     }
+
+  Thanks `@mikecrowe (Mike Crowe) <https://github.com/mikecrowe>`_.
+
+* The undocumented support for specializing ``formatter`` for pointer types
+  has been removed.
+
+* Fixed ``fmt::formatted_size`` with format string compilation
+  (`#2141 <https://github.com/fmtlib/fmt/pull/2141>`_,
+  `#2161 <https://github.com/fmtlib/fmt/pull/2161>`_).
+  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
+
+* Fixed handling of empty format strings during format string compilation
+  (`#2042 <https://github.com/fmtlib/fmt/issues/2042>`_):
+
+  .. code:: c++
+
+     auto s = fmt::format(FMT_COMPILE(""));
+
+  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
+
+* Fixed handling of enums in ``fmt::to_string``
+  (`#2036 <https://github.com/fmtlib/fmt/issues/2036>`_).
+
+* Improved width computation
+  (`#2033 <https://github.com/fmtlib/fmt/issues/2033>`_,
+  `#2091 <https://github.com/fmtlib/fmt/issues/2091>`_). For example:
+
+  .. code:: c++
+
+     #include <fmt/core.h>
+
+     int main() {
+       fmt::print("{:-<10}{}\n", "你好", "世界");
+       fmt::print("{:-<10}{}\n", "hello", "world");
+     }
+
+  prints
+
+  .. image:: https://user-images.githubusercontent.com/576385/
+             119840373-cea3ca80-beb9-11eb-91e0-54266c48e181.png
+
+  on a modern terminal.
+
+* The experimental fast output stream (``fmt::ostream``) is now truncated by
+  default for consistency with ``fopen``
+  (`#2018 <https://github.com/fmtlib/fmt/issues/2018>`_). For example:
+
+  .. code:: c++
+
+     #include <fmt/os.h>
+
+     int main() {
+       fmt::ostream out1 = fmt::output_file("guide");
+       out1.print("Zaphod");
+       out1.close();
+       fmt::ostream out2 = fmt::output_file("guide");
+       out2.print("Ford");
+     }
+
+  writes "Ford" to the file "guide". To preserve the old file content if any
+  pass ``fmt::file::WRONLY | fmt::file::CREATE`` flags to ``fmt::output_file``.
+
+* Fixed moving of ``fmt::ostream`` that holds buffered data
+  (`#2197 <https://github.com/fmtlib/fmt/issues/2197>`_,
+  `#2198 <https://github.com/fmtlib/fmt/pull/2198>`_).
+  Thanks `@vtta <https://github.com/vtta>`_.
+
+* Replaced the ``fmt::system_error`` exception with a function of the same
+  name that constructs ``std::system_error``
+  (`#2266 <https://github.com/fmtlib/fmt/issues/2266>`_).
+
+* Replaced the ``fmt::windows_error`` exception with a function of the same
+  name that constructs ``std::system_error`` with the category returned by
+  ``fmt::system_category()``
+  (`#2274 <https://github.com/fmtlib/fmt/issues/2274>`_,
+  `#2275 <https://github.com/fmtlib/fmt/pull/2275>`_).
+  The latter is similar to ``std::sytem_category`` but correctly handles UTF-8.
+  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
+
+* Replaced ``fmt::error_code`` with ``std::error_code`` and made it formattable
+  (`#2269 <https://github.com/fmtlib/fmt/issues/2269>`_,
+  `#2270 <https://github.com/fmtlib/fmt/pull/2270>`_,
+  `#2273 <https://github.com/fmtlib/fmt/pull/2273>`_).
+  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
+ 
+* Added speech synthesis support
+  (`#2206 <https://github.com/fmtlib/fmt/pull/2206>`_).
+
+* Made ``format_to`` work with a memory buffer that has a custom allocator
+  (`#2300 <https://github.com/fmtlib/fmt/pull/2300>`_).
+  Thanks `@voxmea <https://github.com/voxmea>`_.
+
+* Added ``Allocator::max_size`` support to ``basic_memory_buffer``.
+  (`#1960 <https://github.com/fmtlib/fmt/pull/1960>`_).
+  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
+
+* Added wide string support to ``fmt::join``
+  (`#2236 <https://github.com/fmtlib/fmt/pull/2236>`_).
+  Thanks `@crbrz <https://github.com/crbrz>`_.
+
+* Made iterators passed to ``formatter`` specializations via a format context
+  satisfy C++20 ``std::output_iterator`` requirements
+  (`#2156 <https://github.com/fmtlib/fmt/issues/2156>`_,
+  `#2158 <https://github.com/fmtlib/fmt/pull/2158>`_,
+  `#2195 <https://github.com/fmtlib/fmt/issues/2195>`_,
+  `#2204 <https://github.com/fmtlib/fmt/pull/2204>`_).
+  Thanks `@randomnetcat (Jason Cobb) <https://github.com/randomnetcat>`_.
+
+* Optimized the ``printf`` implementation
+  (`#1982 <https://github.com/fmtlib/fmt/pull/1982>`_,
+  `#1984 <https://github.com/fmtlib/fmt/pull/1984>`_,
+  `#2016 <https://github.com/fmtlib/fmt/pull/2016>`_,
+  `#2164 <https://github.com/fmtlib/fmt/pull/2164>`_).
+  Thanks `@rimathia <https://github.com/rimathia>`_ and
+  `@moiwi <https://github.com/moiwi>`_.
+
+* Improved detection of ``constexpr`` ``char_traits``
+  (`#2246 <https://github.com/fmtlib/fmt/pull/2246>`_,
+  `#2257 <https://github.com/fmtlib/fmt/pull/2257>`_).
+  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
+
+* Fixed writing to ``stdout`` when it is redirected to ``NUL`` on Windows
+  (`#2080 <https://github.com/fmtlib/fmt/issues/2080>`_).
+
+* Fixed exception propagation from iterators
+  (`#2097 <https://github.com/fmtlib/fmt/issues/2097>`_).
+  
+* Improved ``strftime`` error handling 
+  (`#2238 <https://github.com/fmtlib/fmt/issues/2238>`_,
+  `#2244 <https://github.com/fmtlib/fmt/pull/2244>`_).
+  Thanks `@yumeyao <https://github.com/yumeyao>`_.
+
+* Stopped using deprecated GCC UDL template extension.
+
+* Added ``fmt/args.h`` to the install target
+  (`#2096 <https://github.com/fmtlib/fmt/issues/2096>`_).
+
+* Error messages are now passed to assert when exceptions are disabled
+  (`#2145 <https://github.com/fmtlib/fmt/pull/2145>`_).
+  Thanks `@NobodyXu (Jiahao XU) <https://github.com/NobodyXu>`_.
+
+* Added the ``FMT_MASTER_PROJECT`` CMake option to control build and install
+  targets when {fmt} is included via ``add_subdirectory``
+  (`#2098 <https://github.com/fmtlib/fmt/issues/2098>`_,
+  `#2100 <https://github.com/fmtlib/fmt/pull/2100>`_).
+  Thanks `@randomizedthinking <https://github.com/randomizedthinking>`_.
+
+* Improved build configuration
+  (`#2026 <https://github.com/fmtlib/fmt/pull/2026>`_,
+  `#2122 <https://github.com/fmtlib/fmt/pull/2122>`_).
+  Thanks `@luncliff (Park DongHa) <https://github.com/luncliff>`_ and
+  `@ibaned (Dan Ibanez) <https://github.com/ibaned>`_.
+
+* Fixed various warnings and compilation issues
+  (`#1947 <https://github.com/fmtlib/fmt/issues/1947>`_,
+  `#1959 <https://github.com/fmtlib/fmt/pull/1959>`_,
+  `#1963 <https://github.com/fmtlib/fmt/pull/1963>`_,
+  `#1965 <https://github.com/fmtlib/fmt/pull/1965>`_,
+  `#1966 <https://github.com/fmtlib/fmt/issues/1966>`_,
+  `#1974 <https://github.com/fmtlib/fmt/pull/1974>`_,
+  `#1975 <https://github.com/fmtlib/fmt/pull/1975>`_,
+  `#1990 <https://github.com/fmtlib/fmt/pull/1990>`_,
+  `#2000 <https://github.com/fmtlib/fmt/issues/2000>`_,
+  `#2001 <https://github.com/fmtlib/fmt/pull/2001>`_,
+  `#2002 <https://github.com/fmtlib/fmt/issues/2002>`_,
+  `#2004 <https://github.com/fmtlib/fmt/issues/2004>`_,
+  `#2006 <https://github.com/fmtlib/fmt/pull/2006>`_,
+  `#2009 <https://github.com/fmtlib/fmt/pull/2009>`_,
+  `#2010 <https://github.com/fmtlib/fmt/pull/2010>`_,
+  `#2038 <https://github.com/fmtlib/fmt/issues/2038>`_,
+  `#2039 <https://github.com/fmtlib/fmt/issues/2039>`_,
+  `#2047 <https://github.com/fmtlib/fmt/issues/2047>`_,
+  `#2053 <https://github.com/fmtlib/fmt/pull/2053>`_,
+  `#2059 <https://github.com/fmtlib/fmt/issues/2059>`_,
+  `#2065 <https://github.com/fmtlib/fmt/pull/2065>`_,
+  `#2067 <https://github.com/fmtlib/fmt/pull/2067>`_,
+  `#2068 <https://github.com/fmtlib/fmt/pull/2068>`_,
+  `#2073 <https://github.com/fmtlib/fmt/pull/2073>`_,
+  `#2103 <https://github.com/fmtlib/fmt/issues/2103>`_,
+  `#2105 <https://github.com/fmtlib/fmt/issues/2105>`_,
+  `#2106 <https://github.com/fmtlib/fmt/pull/2106>`_,
+  `#2107 <https://github.com/fmtlib/fmt/pull/2107>`_,
+  `#2116 <https://github.com/fmtlib/fmt/issues/2116>`_,
+  `#2117 <https://github.com/fmtlib/fmt/pull/2117>`_,
+  `#2118 <https://github.com/fmtlib/fmt/issues/2118>`_,
+  `#2119 <https://github.com/fmtlib/fmt/pull/2119>`_,
+  `#2127 <https://github.com/fmtlib/fmt/issues/2127>`_,
+  `#2128 <https://github.com/fmtlib/fmt/pull/2128>`_,
+  `#2140 <https://github.com/fmtlib/fmt/issues/2140>`_,
+  `#2142 <https://github.com/fmtlib/fmt/issues/2142>`_,
+  `#2143 <https://github.com/fmtlib/fmt/pull/2143>`_,
+  `#2144 <https://github.com/fmtlib/fmt/pull/2144>`_,
+  `#2147 <https://github.com/fmtlib/fmt/issues/2147>`_,
+  `#2148 <https://github.com/fmtlib/fmt/issues/2148>`_,
+  `#2149 <https://github.com/fmtlib/fmt/issues/2149>`_,
+  `#2152 <https://github.com/fmtlib/fmt/pull/2152>`_,
+  `#2160 <https://github.com/fmtlib/fmt/pull/2160>`_,
+  `#2170 <https://github.com/fmtlib/fmt/issues/2170>`_,
+  `#2175 <https://github.com/fmtlib/fmt/issues/2175>`_,
+  `#2176 <https://github.com/fmtlib/fmt/issues/2176>`_,
+  `#2177 <https://github.com/fmtlib/fmt/pull/2177>`_,
+  `#2178 <https://github.com/fmtlib/fmt/issues/2178>`_,
+  `#2179 <https://github.com/fmtlib/fmt/pull/2179>`_,
+  `#2180 <https://github.com/fmtlib/fmt/issues/2180>`_,
+  `#2181 <https://github.com/fmtlib/fmt/issues/2181>`_,
+  `#2183 <https://github.com/fmtlib/fmt/pull/2183>`_,
+  `#2184 <https://github.com/fmtlib/fmt/issues/2184>`_,
+  `#2185 <https://github.com/fmtlib/fmt/issues/2185>`_,
+  `#2186 <https://github.com/fmtlib/fmt/pull/2186>`_,
+  `#2187 <https://github.com/fmtlib/fmt/pull/2187>`_,
+  `#2190 <https://github.com/fmtlib/fmt/pull/2190>`_,
+  `#2192 <https://github.com/fmtlib/fmt/pull/2192>`_,
+  `#2194 <https://github.com/fmtlib/fmt/pull/2194>`_,
+  `#2205 <https://github.com/fmtlib/fmt/pull/2205>`_,
+  `#2210 <https://github.com/fmtlib/fmt/issues/2210>`_,
+  `#2211 <https://github.com/fmtlib/fmt/pull/2211>`_,
+  `#2215 <https://github.com/fmtlib/fmt/pull/2215>`_,
+  `#2216 <https://github.com/fmtlib/fmt/pull/2216>`_,
+  `#2218 <https://github.com/fmtlib/fmt/pull/2218>`_,
+  `#2220 <https://github.com/fmtlib/fmt/pull/2220>`_,
+  `#2228 <https://github.com/fmtlib/fmt/issues/2228>`_,
+  `#2229 <https://github.com/fmtlib/fmt/pull/2229>`_,
+  `#2230 <https://github.com/fmtlib/fmt/pull/2230>`_,
+  `#2233 <https://github.com/fmtlib/fmt/issues/2233>`_,
+  `#2239 <https://github.com/fmtlib/fmt/pull/2239>`_,
+  `#2248 <https://github.com/fmtlib/fmt/issues/2248>`_,
+  `#2252 <https://github.com/fmtlib/fmt/issues/2252>`_,
+  `#2253 <https://github.com/fmtlib/fmt/pull/2253>`_,
+  `#2255 <https://github.com/fmtlib/fmt/pull/2255>`_,
+  `#2261 <https://github.com/fmtlib/fmt/issues/2261>`_,
+  `#2278 <https://github.com/fmtlib/fmt/issues/2278>`_,
+  `#2284 <https://github.com/fmtlib/fmt/issues/2284>`_,
+  `#2287 <https://github.com/fmtlib/fmt/pull/2287>`_,
+  `#2289 <https://github.com/fmtlib/fmt/pull/2289>`_,
+  `#2290 <https://github.com/fmtlib/fmt/pull/2290>`_,
+  `#2293 <https://github.com/fmtlib/fmt/pull/2293>`_,
+  `#2295 <https://github.com/fmtlib/fmt/issues/2295>`_,
+  `#2296 <https://github.com/fmtlib/fmt/pull/2296>`_,
+  `#2297 <https://github.com/fmtlib/fmt/pull/2297>`_,
+  `#2311 <https://github.com/fmtlib/fmt/issues/2311>`_,
+  `#2313 <https://github.com/fmtlib/fmt/pull/2313>`_,
+  `#2315 <https://github.com/fmtlib/fmt/pull/2315>`_,
+  `#2320 <https://github.com/fmtlib/fmt/issues/2320>`_,
+  `#2321 <https://github.com/fmtlib/fmt/pull/2321>`_,
+  `#2323 <https://github.com/fmtlib/fmt/pull/2323>`_,
+  `#2328 <https://github.com/fmtlib/fmt/issues/2328>`_,
+  `#2329 <https://github.com/fmtlib/fmt/pull/2329>`_,
+  `#2333 <https://github.com/fmtlib/fmt/pull/2333>`_,
+  `#2338 <https://github.com/fmtlib/fmt/pull/2338>`_,
+  `#2341 <https://github.com/fmtlib/fmt/pull/2341>`_).
+  Thanks `@darklukee <https://github.com/darklukee>`_,
+  `@fagg (Ashton Fagg) <https://github.com/fagg>`_,
+  `@killerbot242 (Lieven de Cock) <https://github.com/killerbot242>`_,
+  `@jgopel (Jonathan Gopel) <https://github.com/jgopel>`_,
+  `@yeswalrus (Walter Gray) <https://github.com/yeswalrus>`_,
+  `@Finkman <https://github.com/Finkman>`_,
+  `@HazardyKnusperkeks (Björn Schäpers) <https://github.com/HazardyKnusperkeks>`_,
+  `@dkavolis (Daumantas Kavolis) <https://github.com/dkavolis>`_,
+  `@concatime (Issam Maghni) <https://github.com/concatime>`_,
+  `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_,
+  `@summivox (Yin Zhong) <https://github.com/summivox>`_,
+  `@yNeo <https://github.com/yNeo>`_,
+  `@Apache-HB (Elliot) <https://github.com/Apache-HB>`_,
+  `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_,
+  `@toojays (John Steele Scott) <https://github.com/toojays>`_,
+  `@Brainy0207 <https://github.com/Brainy0207>`_,
+  `@vadz (VZ) <https://github.com/vadz>`_,
+  `@imsherlock (Ryan Sherlock) <https://github.com/imsherlock>`_,
+  `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_,
+  `@white238 (Chris White) <https://github.com/white238>`_,
+  `@yafshar (Yaser Afshar) <https://github.com/yafshar>`_,
+  `@BillyDonahue (Billy Donahue) <https://github.com/BillyDonahue>`_,
+  `@jstaahl <https://github.com/jstaahl>`_,
+  `@denchat <https://github.com/denchat>`_,
+  `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
+  `@ilyakurdyukov (Ilya Kurdyukov) <https://github.com/ilyakurdyukov>`_,
+  `@ilmai <https://github.com/ilmai>`_,
+  `@JessyDL (Jessy De Lannoit) <https://github.com/JessyDL>`_,
+  `@sergiud (Sergiu Deitsch) <https://github.com/sergiud>`_,
+  `@mwinterb <https://github.com/mwinterb>`_,
+  `@sven-herrmann <https://github.com/sven-herrmann>`_,
+  `@jmelas (John Melas) <https://github.com/jmelas>`_,
+  `@twoixter (Jose Miguel Pérez) <https://github.com/twoixter>`_,
+  `@crbrz <https://github.com/crbrz>`_,
+  `@upsj (Tobias Ribizel) <https://github.com/upsj>`_.
+
+* Improved documentation
+  (`#1986 <https://github.com/fmtlib/fmt/issues/1986>`_,
+  `#2051 <https://github.com/fmtlib/fmt/pull/2051>`_,
+  `#2057 <https://github.com/fmtlib/fmt/issues/2057>`_,
+  `#2081 <https://github.com/fmtlib/fmt/pull/2081>`_,
+  `#2084 <https://github.com/fmtlib/fmt/issues/2084>`_,
+  `#2312 <https://github.com/fmtlib/fmt/pull/2312>`_).
+  Thanks `@imba-tjd (谭九鼎) <https://github.com/imba-tjd>`_,
+  `@0x416c69 (AlιAѕѕaѕѕιN) <https://github.com/0x416c69>`_,
+  `@mordante <https://github.com/mordante>`_.
+
+* Continuous integration and test improvements
+  (`#1969 <https://github.com/fmtlib/fmt/issues/1969>`_,
+  `#1991 <https://github.com/fmtlib/fmt/pull/1991>`_,
+  `#2020 <https://github.com/fmtlib/fmt/pull/2020>`_,
+  `#2110 <https://github.com/fmtlib/fmt/pull/2110>`_,
+  `#2114 <https://github.com/fmtlib/fmt/pull/2114>`_,
+  `#2196 <https://github.com/fmtlib/fmt/issues/2196>`_,
+  `#2217 <https://github.com/fmtlib/fmt/pull/2217>`_,
+  `#2247 <https://github.com/fmtlib/fmt/pull/2247>`_,
+  `#2256 <https://github.com/fmtlib/fmt/pull/2256>`_,
+  `#2336 <https://github.com/fmtlib/fmt/pull/2336>`_,
+  `#2346 <https://github.com/fmtlib/fmt/pull/2346>`_).
+  Thanks `@jgopel (Jonathan Gopel) <https://github.com/jgopel>`_,
+  `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_ and
+  `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
+  
+7.1.3 - 2020-11-24
+------------------
+
+* Fixed handling of buffer boundaries in ``format_to_n``
+  (`#1996 <https://github.com/fmtlib/fmt/issues/1996>`_,
+  `#2029 <https://github.com/fmtlib/fmt/issues/2029>`_).
+
+* Fixed linkage errors when linking with a shared library
+  (`#2011 <https://github.com/fmtlib/fmt/issues/2011>`_).
+
+* Reintroduced ostream support to range formatters
+  (`#2014 <https://github.com/fmtlib/fmt/issues/2014>`_).
+
+* Worked around an issue with mixing std versions in gcc
+  (`#2017 <https://github.com/fmtlib/fmt/issues/2017>`_).
+
+7.1.2 - 2020-11-04
+------------------
+
+* Fixed floating point formatting with large precision
+  (`#1976 <https://github.com/fmtlib/fmt/issues/1976>`_).
+
+7.1.1 - 2020-11-01
+------------------
+
+* Fixed ABI compatibility with 7.0.x
+  (`#1961 <https://github.com/fmtlib/fmt/issues/1961>`_).
+
+* Added the ``FMT_ARM_ABI_COMPATIBILITY`` macro to work around ABI
+  incompatibility between GCC and Clang on ARM
+  (`#1919 <https://github.com/fmtlib/fmt/issues/1919>`_).
+
+* Worked around a SFINAE bug in GCC 8
+  (`#1957 <https://github.com/fmtlib/fmt/issues/1957>`_).
+
+* Fixed linkage errors when building with GCC's LTO
+  (`#1955 <https://github.com/fmtlib/fmt/issues/1955>`_).
+
+* Fixed a compilation error when building without ``__builtin_clz`` or equivalent
+  (`#1968 <https://github.com/fmtlib/fmt/pull/1968>`_).
+  Thanks `@tohammer (Tobias Hammer) <https://github.com/tohammer>`_.
+
+* Fixed a sign conversion warning
+  (`#1964 <https://github.com/fmtlib/fmt/pull/1964>`_).
+  Thanks `@OptoCloud <https://github.com/OptoCloud>`_.
+
+7.1.0 - 2020-10-25
+------------------
+
+* Switched from `Grisu3
+  <https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf>`_
+  to `Dragonbox <https://github.com/jk-jeon/dragonbox>`_ for the default
+  floating-point formatting which gives the shortest decimal representation
+  with round-trip guarantee and correct rounding
+  (`#1882 <https://github.com/fmtlib/fmt/pull/1882>`_,
+  `#1887 <https://github.com/fmtlib/fmt/pull/1887>`_,
+  `#1894 <https://github.com/fmtlib/fmt/pull/1894>`_). This makes {fmt} up to
+  20-30x faster than common implementations of ``std::ostringstream`` and
+  ``sprintf`` on `dtoa-benchmark <https://github.com/fmtlib/dtoa-benchmark>`_
+  and faster than double-conversion and Ryū:
+
+  .. image:: https://user-images.githubusercontent.com/576385/
+             95684665-11719600-0ba8-11eb-8e5b-972ff4e49428.png
+
+  It is possible to get even better performance at the cost of larger binary
+  size by compiling with the ``FMT_USE_FULL_CACHE_DRAGONBOX`` macro set to 1.
+
+  Thanks `@jk-jeon (Junekey Jeon) <https://github.com/jk-jeon>`_.
+
+* Added an experimental unsynchronized file output API which, together with
+  `format string compilation <https://fmt.dev/latest/api.html#compile-api>`_,
+  can give `5-9 times speed up compared to fprintf
+  <https://www.zverovich.net/2020/08/04/optimal-file-buffer-size.html>`_
+  on common platforms (`godbolt <https://godbolt.org/z/nsTcG8>`__):
+
+  .. code:: c++
+
+     #include <fmt/os.h>
+
+     int main() {
+       auto f = fmt::output_file("guide");
+       f.print("The answer is {}.", 42);
+     }
+
+* Added a formatter for ``std::chrono::time_point<system_clock>``
+  (`#1819 <https://github.com/fmtlib/fmt/issues/1819>`_,
+  `#1837 <https://github.com/fmtlib/fmt/pull/1837>`_). For example
+  (`godbolt <https://godbolt.org/z/c4M6fh>`__):
+
+  .. code:: c++
+
+     #include <fmt/chrono.h>
+
+     int main() {
+       auto now = std::chrono::system_clock::now();
+       fmt::print("The time is {:%H:%M:%S}.\n", now);
+     }
+
+  Thanks `@adamburgess (Adam Burgess) <https://github.com/adamburgess>`_.
+
+* Added support for ranges with non-const ``begin``/``end`` to ``fmt::join``
+  (`#1784 <https://github.com/fmtlib/fmt/issues/1784>`_,
+  `#1786 <https://github.com/fmtlib/fmt/pull/1786>`_). For example
+  (`godbolt <https://godbolt.org/z/jP63Tv>`__):
+
+  .. code:: c++
+
+     #include <fmt/ranges.h>
+     #include <range/v3/view/filter.hpp>
+
+     int main() {
+       using std::literals::string_literals::operator""s;
+       auto strs = std::array{"a"s, "bb"s, "ccc"s};
+       auto range = strs | ranges::views::filter(
+         [] (const std::string &x) { return x.size() != 2; }
+       );
+       fmt::print("{}\n", fmt::join(range, ""));
+     }
+
+  prints "accc".
+
+  Thanks `@tonyelewis (Tony E Lewis) <https://github.com/tonyelewis>`_.
+
+* Added a ``memory_buffer::append`` overload that takes a range
+  (`#1806 <https://github.com/fmtlib/fmt/pull/1806>`_).
+  Thanks `@BRevzin (Barry Revzin) <https://github.com/BRevzin>`_.
+
+* Improved handling of single code units in ``FMT_COMPILE``. For example:
+
+  .. code:: c++
+
+     #include <fmt/compile.h>
+
+     char* f(char* buf) {
+       return fmt::format_to(buf, FMT_COMPILE("x{}"), 42);
+     }
+
+  compiles to just (`godbolt <https://godbolt.org/z/5vncz3>`__):
+
+  .. code:: asm
+
+     _Z1fPc:
+       movb $120, (%rdi)
+       xorl %edx, %edx
+       cmpl $42, _ZN3fmt2v76detail10basic_dataIvE23zero_or_powers_of_10_32E+8(%rip)
+       movl $3, %eax
+       seta %dl
+       subl %edx, %eax
+       movzwl _ZN3fmt2v76detail10basic_dataIvE6digitsE+84(%rip), %edx
+       cltq
+       addq %rdi, %rax
+       movw %dx, -2(%rax)
+       ret
+
+  Here a single ``mov`` instruction writes ``'x'`` (``$120``) to the output
+  buffer.
+
+* Added dynamic width support to format string compilation
+  (`#1809 <https://github.com/fmtlib/fmt/issues/1809>`_).
+
+* Improved error reporting for unformattable types: now you'll get the type name
+  directly in the error message instead of the note:
+
+  .. code:: c++
+
+     #include <fmt/core.h>
+
+     struct how_about_no {};
+
+     int main() {
+       fmt::print("{}", how_about_no());
+     }
+
+  Error (`godbolt <https://godbolt.org/z/GoxM4e>`__):
+
+  ``fmt/core.h:1438:3: error: static_assert failed due to requirement
+  'fmt::v7::formattable<how_about_no>()' "Cannot format an argument.
+  To make type T formattable provide a formatter<T> specialization:
+  https://fmt.dev/latest/api.html#udt"
+  ...``
+
+* Added the `make_args_checked <https://fmt.dev/7.1.0/api.html#argument-lists>`_
+  function template that allows you to write formatting functions with
+  compile-time format string checks and avoid binary code bloat
+  (`godbolt <https://godbolt.org/z/PEf9qr>`__):
+
+  .. code:: c++
+
+     void vlog(const char* file, int line, fmt::string_view format,
+               fmt::format_args args) {
+       fmt::print("{}: {}: ", file, line);
+       fmt::vprint(format, args);
+     }
+
+     template <typename S, typename... Args>
+     void log(const char* file, int line, const S& format, Args&&... args) {
+       vlog(file, line, format,
+           fmt::make_args_checked<Args...>(format, args...));
+     }
+
+     #define MY_LOG(format, ...) \
+       log(__FILE__, __LINE__, FMT_STRING(format), __VA_ARGS__)
+
+     MY_LOG("invalid squishiness: {}", 42);
+
+* Replaced ``snprintf`` fallback with a faster internal IEEE 754 ``float`` and
+  ``double`` formatter for arbitrary precision. For example
+  (`godbolt <https://godbolt.org/z/dPhWvj>`__):
+
+  .. code:: c++
+
+     #include <fmt/core.h>
+
+     int main() {
+       fmt::print("{:.500}\n", 4.9406564584124654E-324);
+     }
+
+  prints
+
+  ``4.9406564584124654417656879286822137236505980261432476442558568250067550727020875186529983636163599237979656469544571773092665671035593979639877479601078187812630071319031140452784581716784898210368871863605699873072305000638740915356498438731247339727316961514003171538539807412623856559117102665855668676818703956031062493194527159149245532930545654440112748012970999954193198940908041656332452475714786901472678015935523861155013480352649347201937902681071074917033322268447533357208324319360923829e-324``.
+
+* Made ``format_to_n`` and ``formatted_size`` part of the `core API
+  <https://fmt.dev/latest/api.html#core-api>`__
+  (`godbolt <https://godbolt.org/z/sPjY1K>`__):
+
+  .. code:: c++
+
+     #include <fmt/core.h>
+
+     int main() {
+       char buffer[10];
+       auto result = fmt::format_to_n(buffer, sizeof(buffer), "{}", 42);
+     }
+
+* Added ``fmt::format_to_n`` overload with format string compilation
+  (`#1764 <https://github.com/fmtlib/fmt/issues/1764>`_,
+  `#1767 <https://github.com/fmtlib/fmt/pull/1767>`_,
+  `#1869 <https://github.com/fmtlib/fmt/pull/1869>`_). For example
+  (`godbolt <https://godbolt.org/z/93h86q>`__):
+
+  .. code:: c++
+
+     #include <fmt/compile.h>
+
+     int main() {
+       char buffer[8];
+       fmt::format_to_n(buffer, sizeof(buffer), FMT_COMPILE("{}"), 42);
+     }
+
+  Thanks `@Kurkin (Dmitry Kurkin) <https://github.com/Kurkin>`_,
+  `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
+
+* Added ``fmt::format_to`` overload that take ``text_style``
+  (`#1593 <https://github.com/fmtlib/fmt/issues/1593>`_,
+  `#1842 <https://github.com/fmtlib/fmt/issues/1842>`_,
+  `#1843 <https://github.com/fmtlib/fmt/pull/1843>`_). For example
+  (`godbolt <https://godbolt.org/z/91153r>`__):
+
+  .. code:: c++
+
+     #include <fmt/color.h>
+
+     int main() {
+       std::string out;
+       fmt::format_to(std::back_inserter(out),
+                      fmt::emphasis::bold | fg(fmt::color::red),
+                      "The answer is {}.", 42);
+     }
+
+  Thanks `@Naios (Denis Blank) <https://github.com/Naios>`_.
+
+* Made the ``'#'`` specifier emit trailing zeros in addition to the decimal
+  point (`#1797 <https://github.com/fmtlib/fmt/issues/1797>`_). For example
+  (`godbolt <https://godbolt.org/z/bhdcW9>`__):
+
+  .. code:: c++
+
+     #include <fmt/core.h>
+
+     int main() {
+       fmt::print("{:#.2g}", 0.5);
+     }
+
+  prints ``0.50``.
+
+* Changed the default floating point format to not include ``.0`` for
+  consistency with ``std::format`` and ``std::to_chars``
+  (`#1893 <https://github.com/fmtlib/fmt/issues/1893>`_,
+  `#1943 <https://github.com/fmtlib/fmt/issues/1943>`_). It is possible to get
+  the decimal point and trailing zero with the ``#`` specifier.
+
+* Fixed an issue with floating-point formatting that could result in addition of
+  a non-significant trailing zero in rare cases e.g. ``1.00e-34`` instead of
+  ``1.0e-34`` (`#1873 <https://github.com/fmtlib/fmt/issues/1873>`_,
+  `#1917 <https://github.com/fmtlib/fmt/issues/1917>`_).
+
+* Made ``fmt::to_string`` fallback on ``ostream`` insertion operator if
+  the ``formatter`` specialization is not provided
+  (`#1815 <https://github.com/fmtlib/fmt/issues/1815>`_,
+  `#1829 <https://github.com/fmtlib/fmt/pull/1829>`_).
+  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
+
+* Added support for the append mode to the experimental file API and
+  improved ``fcntl.h`` detection.
+  (`#1847 <https://github.com/fmtlib/fmt/pull/1847>`_,
+  `#1848 <https://github.com/fmtlib/fmt/pull/1848>`_).
+  Thanks `@t-wiser <https://github.com/t-wiser>`_.
+
+* Fixed handling of types that have both an implicit conversion operator and
+  an overloaded ``ostream`` insertion operator
+  (`#1766 <https://github.com/fmtlib/fmt/issues/1766>`_).
+
+* Fixed a slicing issue in an internal iterator type
+  (`#1822 <https://github.com/fmtlib/fmt/pull/1822>`_).
+  Thanks `@BRevzin (Barry Revzin) <https://github.com/BRevzin>`_.
+
+* Fixed an issue in locale-specific integer formatting
+  (`#1927 <https://github.com/fmtlib/fmt/issues/1927>`_).
+
+* Fixed handling of exotic code unit types
+  (`#1870 <https://github.com/fmtlib/fmt/issues/1870>`_,
+  `#1932 <https://github.com/fmtlib/fmt/issues/1932>`_).
+
+* Improved ``FMT_ALWAYS_INLINE``
+  (`#1878 <https://github.com/fmtlib/fmt/pull/1878>`_).
+  Thanks `@jk-jeon (Junekey Jeon) <https://github.com/jk-jeon>`_.
+
+* Removed dependency on ``windows.h``
+  (`#1900 <https://github.com/fmtlib/fmt/pull/1900>`_).
+  Thanks `@bernd5 (Bernd Baumanns) <https://github.com/bernd5>`_.
+
+* Optimized counting of decimal digits on MSVC
+  (`#1890 <https://github.com/fmtlib/fmt/pull/1890>`_).
+  Thanks `@mwinterb <https://github.com/mwinterb>`_.
+
+* Improved documentation
+  (`#1772 <https://github.com/fmtlib/fmt/issues/1772>`_,
+  `#1775 <https://github.com/fmtlib/fmt/pull/1775>`_,
+  `#1792 <https://github.com/fmtlib/fmt/pull/1792>`_,
+  `#1838 <https://github.com/fmtlib/fmt/pull/1838>`_,
+  `#1888 <https://github.com/fmtlib/fmt/pull/1888>`_,
+  `#1918 <https://github.com/fmtlib/fmt/pull/1918>`_,
+  `#1939 <https://github.com/fmtlib/fmt/pull/1939>`_).
+  Thanks `@leolchat (Léonard Gérard) <https://github.com/leolchat>`_,
+  `@pepsiman (Malcolm Parsons) <https://github.com/pepsiman>`_,
+  `@Klaim (Joël Lamotte) <https://github.com/Klaim>`_,
+  `@ravijanjam (Ravi J) <https://github.com/ravijanjam>`_,
+  `@francesco-st <https://github.com/francesco-st>`_,
+  `@udnaan (Adnan) <https://github.com/udnaan>`_.
+
+* Added the ``FMT_REDUCE_INT_INSTANTIATIONS`` CMake option that reduces the
+  binary code size at the cost of some integer formatting performance. This can
+  be useful for extremely memory-constrained embedded systems
+  (`#1778 <https://github.com/fmtlib/fmt/issues/1778>`_,
+  `#1781 <https://github.com/fmtlib/fmt/pull/1781>`_).
+  Thanks `@kammce (Khalil Estell) <https://github.com/kammce>`_.
+
+* Added the ``FMT_USE_INLINE_NAMESPACES`` macro to control usage of inline
+  namespaces (`#1945 <https://github.com/fmtlib/fmt/pull/1945>`_).
+  Thanks `@darklukee <https://github.com/darklukee>`_.
+
+* Improved build configuration
+  (`#1760 <https://github.com/fmtlib/fmt/pull/1760>`_,
+  `#1770 <https://github.com/fmtlib/fmt/pull/1770>`_,
+  `#1779 <https://github.com/fmtlib/fmt/issues/1779>`_,
+  `#1783 <https://github.com/fmtlib/fmt/pull/1783>`_,
+  `#1823 <https://github.com/fmtlib/fmt/pull/1823>`_).
+  Thanks `@dvetutnev (Dmitriy Vetutnev) <https://github.com/dvetutnev>`_,
+  `@xvitaly (Vitaly Zaitsev) <https://github.com/xvitaly>`_,
+  `@tambry (Raul Tambre) <https://github.com/tambry>`_,
+  `@medithe <https://github.com/medithe>`_,
+  `@martinwuehrer (Martin Wührer) <https://github.com/martinwuehrer>`_.
+
+* Fixed various warnings and compilation issues
+  (`#1790 <https://github.com/fmtlib/fmt/pull/1790>`_,
+  `#1802 <https://github.com/fmtlib/fmt/pull/1802>`_,
+  `#1808 <https://github.com/fmtlib/fmt/pull/1808>`_,
+  `#1810 <https://github.com/fmtlib/fmt/issues/1810>`_,
+  `#1811 <https://github.com/fmtlib/fmt/issues/1811>`_,
+  `#1812 <https://github.com/fmtlib/fmt/pull/1812>`_,
+  `#1814 <https://github.com/fmtlib/fmt/pull/1814>`_,
+  `#1816 <https://github.com/fmtlib/fmt/pull/1816>`_,
+  `#1817 <https://github.com/fmtlib/fmt/pull/1817>`_,
+  `#1818 <https://github.com/fmtlib/fmt/pull/1818>`_,
+  `#1825 <https://github.com/fmtlib/fmt/issues/1825>`_,
+  `#1836 <https://github.com/fmtlib/fmt/pull/1836>`_,
+  `#1855 <https://github.com/fmtlib/fmt/pull/1855>`_,
+  `#1856 <https://github.com/fmtlib/fmt/pull/1856>`_,
+  `#1860 <https://github.com/fmtlib/fmt/pull/1860>`_,
+  `#1877 <https://github.com/fmtlib/fmt/pull/1877>`_,
+  `#1879 <https://github.com/fmtlib/fmt/pull/1879>`_,
+  `#1880 <https://github.com/fmtlib/fmt/pull/1880>`_,
+  `#1896 <https://github.com/fmtlib/fmt/issues/1896>`_,
+  `#1897 <https://github.com/fmtlib/fmt/pull/1897>`_,
+  `#1898 <https://github.com/fmtlib/fmt/pull/1898>`_,
+  `#1904 <https://github.com/fmtlib/fmt/issues/1904>`_,
+  `#1908 <https://github.com/fmtlib/fmt/pull/1908>`_,
+  `#1911 <https://github.com/fmtlib/fmt/issues/1911>`_,
+  `#1912 <https://github.com/fmtlib/fmt/issues/1912>`_,
+  `#1928 <https://github.com/fmtlib/fmt/issues/1928>`_,
+  `#1929 <https://github.com/fmtlib/fmt/pull/1929>`_,
+  `#1935 <https://github.com/fmtlib/fmt/issues/1935>`_,
+  `#1937 <https://github.com/fmtlib/fmt/pull/1937>`_,
+  `#1942 <https://github.com/fmtlib/fmt/pull/1942>`_,
+  `#1949 <https://github.com/fmtlib/fmt/issues/1949>`_).
+  Thanks `@TheQwertiest <https://github.com/TheQwertiest>`_,
+  `@medithe <https://github.com/medithe>`_,
+  `@martinwuehrer (Martin Wührer) <https://github.com/martinwuehrer>`_,
+  `@n16h7hunt3r <https://github.com/n16h7hunt3r>`_,
+  `@Othereum (Seokjin Lee) <https://github.com/Othereum>`_,
+  `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
+  `@AlexanderLanin (Alexander Lanin) <https://github.com/AlexanderLanin>`_,
+  `@gcerretani (Giovanni Cerretani) <https://github.com/gcerretani>`_,
+  `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_,
+  `@noizefloor (Jan Schwers) <https://github.com/noizefloor>`_,
+  `@akohlmey (Axel Kohlmeyer) <https://github.com/akohlmey>`_,
+  `@jk-jeon (Junekey Jeon) <https://github.com/jk-jeon>`_,
+  `@rimathia <https://github.com/rimathia>`_,
+  `@rglarix (Riccardo Ghetta (larix)) <https://github.com/rglarix>`_,
+  `@moiwi <https://github.com/moiwi>`_,
+  `@heckad (Kazantcev Andrey) <https://github.com/heckad>`_,
+  `@MarcDirven <https://github.com/MarcDirven>`_.
+  `@BartSiwek (Bart Siwek) <https://github.com/BartSiwek>`_,
+  `@darklukee <https://github.com/darklukee>`_.
+
+7.0.3 - 2020-08-06
+------------------
+
+* Worked around broken ``numeric_limits`` for 128-bit integers
+  (`#1787 <https://github.com/fmtlib/fmt/issues/1787>`_).
+
+* Added error reporting on missing named arguments
+  (`#1796 <https://github.com/fmtlib/fmt/issues/1796>`_).
+
+* Stopped using 128-bit integers with clang-cl
+  (`#1800 <https://github.com/fmtlib/fmt/pull/1800>`_).
+  Thanks `@Kingcom <https://github.com/Kingcom>`_.
+
+* Fixed issues in locale-specific integer formatting
+  (`#1782 <https://github.com/fmtlib/fmt/issues/1782>`_,
+  `#1801 <https://github.com/fmtlib/fmt/issues/1801>`_).
+
+7.0.2 - 2020-07-29
+------------------
+
+* Worked around broken ``numeric_limits`` for 128-bit integers
+  (`#1725 <https://github.com/fmtlib/fmt/issues/1725>`_).
+
+* Fixed compatibility with CMake 3.4
+  (`#1779 <https://github.com/fmtlib/fmt/issues/1779>`_).
+
+* Fixed handling of digit separators in locale-specific formatting
+  (`#1782 <https://github.com/fmtlib/fmt/issues/1782>`_).
+
+7.0.1 - 2020-07-07
+------------------
+
+* Updated the inline version namespace name.
+
+* Worked around a gcc bug in mangling of alias templates
+  (`#1753 <https://github.com/fmtlib/fmt/issues/1753>`_).
+
+* Fixed a linkage error on Windows
+  (`#1757 <https://github.com/fmtlib/fmt/issues/1757>`_).
+  Thanks `@Kurkin (Dmitry Kurkin) <https://github.com/Kurkin>`_.
+
+* Fixed minor issues with the documentation.
+
+7.0.0 - 2020-07-05
+------------------
+
+* Reduced the library size. For example, on macOS a stripped test binary
+  statically linked with {fmt} `shrank from ~368k to less than 100k
+  <http://www.zverovich.net/2020/05/21/reducing-library-size.html>`_.
+
+* Added a simpler and more efficient `format string compilation API
+  <https://fmt.dev/7.0.0/api.html#compile-api>`_:
+
+  .. code:: c++
+
+     #include <fmt/compile.h>
+
+     // Converts 42 into std::string using the most efficient method and no
+     // runtime format string processing.
+     std::string s = fmt::format(FMT_COMPILE("{}"), 42);
+
+  The old ``fmt::compile`` API is now deprecated.
+
+* Optimized integer formatting: ``format_to`` with format string compilation
+  and a stack-allocated buffer is now `faster than to_chars on both
+  libc++ and libstdc++
+  <http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html>`_.
+
+* Optimized handling of small format strings. For example,
+
+  .. code:: c++
+
+      fmt::format("Result: {}: ({},{},{},{})", str1, str2, str3, str4, str5)
+
+  is now ~40% faster (`#1685 <https://github.com/fmtlib/fmt/issues/1685>`_).
+
+* Applied extern templates to improve compile times when using the core API
+  and ``fmt/format.h`` (`#1452 <https://github.com/fmtlib/fmt/issues/1452>`_).
+  For example, on macOS with clang the compile time of a test translation unit
+  dropped from 2.3s to 0.3s with ``-O2`` and from 0.6s to 0.3s with the default
+  settings (``-O0``).
+
+  Before (``-O2``)::
+
+    % time c++ -c test.cc -I include -std=c++17 -O2
+    c++ -c test.cc -I include -std=c++17 -O2  2.22s user 0.08s system 99% cpu 2.311 total
+
+  After (``-O2``)::
+
+    % time c++ -c test.cc -I include -std=c++17 -O2
+    c++ -c test.cc -I include -std=c++17 -O2  0.26s user 0.04s system 98% cpu 0.303 total
+
+  Before (default)::
+
+    % time c++ -c test.cc -I include -std=c++17
+    c++ -c test.cc -I include -std=c++17  0.53s user 0.06s system 98% cpu 0.601 total
+
+  After (default)::
+
+    % time c++ -c test.cc -I include -std=c++17
+    c++ -c test.cc -I include -std=c++17  0.24s user 0.06s system 98% cpu 0.301 total
+
+  It is still recommended to use ``fmt/core.h`` instead of ``fmt/format.h`` but
+  the compile time difference is now smaller. Thanks
+  `@alex3d <https://github.com/alex3d>`_ for the suggestion.
+
+* Named arguments are now stored on stack (no dynamic memory allocations) and
+  the compiled code is more compact and efficient. For example
+
+  .. code:: c++
+
+     #include <fmt/core.h>
+
+     int main() {
+       fmt::print("The answer is {answer}\n", fmt::arg("answer", 42));
+     }
+
+  compiles to just (`godbolt <https://godbolt.org/z/NcfEp_>`__)
+
+  .. code:: asm
+
+      .LC0:
+              .string "answer"
+      .LC1:
+              .string "The answer is {answer}\n"
+      main:
+              sub     rsp, 56
+              mov     edi, OFFSET FLAT:.LC1
+              mov     esi, 23
+              movabs  rdx, 4611686018427387905
+              lea     rax, [rsp+32]
+              lea     rcx, [rsp+16]
+              mov     QWORD PTR [rsp+8], 1
+              mov     QWORD PTR [rsp], rax
+              mov     DWORD PTR [rsp+16], 42
+              mov     QWORD PTR [rsp+32], OFFSET FLAT:.LC0
+              mov     DWORD PTR [rsp+40], 0
+              call    fmt::v6::vprint(fmt::v6::basic_string_view<char>,
+                                      fmt::v6::format_args)
+              xor     eax, eax
+              add     rsp, 56
+              ret
+
+          .L.str.1:
+                  .asciz  "answer"
+
+* Implemented compile-time checks for dynamic width and precision
+  (`#1614 <https://github.com/fmtlib/fmt/issues/1614>`_):
+
+  .. code:: c++
+
+     #include <fmt/format.h>
+
+     int main() {
+       fmt::print(FMT_STRING("{0:{1}}"), 42);
+     }
+
+  now gives a compilation error because argument 1 doesn't exist::
+
+    In file included from test.cc:1:
+    include/fmt/format.h:2726:27: error: constexpr variable 'invalid_format' must be
+    initialized by a constant expression
+      FMT_CONSTEXPR_DECL bool invalid_format =
+                              ^
+    ...
+    include/fmt/core.h:569:26: note: in call to
+    '&checker(s, {}).context_->on_error(&"argument not found"[0])'
+        if (id >= num_args_) on_error("argument not found");
+                            ^
+
+* Added sentinel support to ``fmt::join``
+  (`#1689 <https://github.com/fmtlib/fmt/pull/1689>`_)
+
+  .. code:: c++
+
+    struct zstring_sentinel {};
+    bool operator==(const char* p, zstring_sentinel) { return *p == '\0'; }
+    bool operator!=(const char* p, zstring_sentinel) { return *p != '\0'; }
+
+    struct zstring {
+      const char* p;
+      const char* begin() const { return p; }
+      zstring_sentinel end() const { return {}; }
+    };
+
+    auto s = fmt::format("{}", fmt::join(zstring{"hello"}, "_"));
+    // s == "h_e_l_l_o"
+
+  Thanks `@BRevzin (Barry Revzin) <https://github.com/BRevzin>`_.
+
+* Added support for named arguments, ``clear`` and ``reserve`` to
+  ``dynamic_format_arg_store``
+  (`#1655 <https://github.com/fmtlib/fmt/issues/1655>`_,
+  `#1663 <https://github.com/fmtlib/fmt/pull/1663>`_,
+  `#1674 <https://github.com/fmtlib/fmt/pull/1674>`_,
+  `#1677 <https://github.com/fmtlib/fmt/pull/1677>`_).
+  Thanks `@vsolontsov-ll (Vladimir Solontsov)
+  <https://github.com/vsolontsov-ll>`_.
+
+* Added support for the ``'c'`` format specifier to integral types for
+  compatibility with ``std::format``
+  (`#1652 <https://github.com/fmtlib/fmt/issues/1652>`_).
+
+* Replaced the ``'n'`` format specifier with ``'L'`` for compatibility with
+  ``std::format`` (`#1624 <https://github.com/fmtlib/fmt/issues/1624>`_).
+  The ``'n'`` specifier can be enabled via the ``FMT_DEPRECATED_N_SPECIFIER``
+  macro.
+
+* The ``'='`` format specifier is now disabled by default for compatibility with
+  ``std::format``. It can be enabled via the ``FMT_DEPRECATED_NUMERIC_ALIGN``
+  macro.
+
+* Removed the following deprecated APIs:
+
+  * ``FMT_STRING_ALIAS`` and ``fmt`` macros - replaced by ``FMT_STRING``
+  * ``fmt::basic_string_view::char_type`` - replaced by
+    ``fmt::basic_string_view::value_type``
+  * ``convert_to_int``
+  * ``format_arg_store::types``
+  * ``*parse_context`` - replaced by ``*format_parse_context``
+  * ``FMT_DEPRECATED_INCLUDE_OS``
+  * ``FMT_DEPRECATED_PERCENT`` - incompatible with ``std::format``
+  * ``*writer`` - replaced by compiled format API
+
+* Renamed the ``internal`` namespace to ``detail``
+  (`#1538 <https://github.com/fmtlib/fmt/issues/1538>`_). The former is still
+  provided as an alias if the ``FMT_USE_INTERNAL`` macro is defined.
+
+* Improved compatibility between ``fmt::printf`` with the standard specs
+  (`#1595 <https://github.com/fmtlib/fmt/issues/1595>`_,
+  `#1682 <https://github.com/fmtlib/fmt/pull/1682>`_,
+  `#1683 <https://github.com/fmtlib/fmt/pull/1683>`_,
+  `#1687 <https://github.com/fmtlib/fmt/pull/1687>`_,
+  `#1699 <https://github.com/fmtlib/fmt/pull/1699>`_).
+  Thanks `@rimathia <https://github.com/rimathia>`_.
+
+* Fixed handling of ``operator<<`` overloads that use ``copyfmt``
+  (`#1666 <https://github.com/fmtlib/fmt/issues/1666>`_).
+
+* Added the ``FMT_OS`` CMake option to control inclusion of OS-specific APIs
+  in the fmt target. This can be useful for embedded platforms
+  (`#1654 <https://github.com/fmtlib/fmt/issues/1654>`_,
+  `#1656 <https://github.com/fmtlib/fmt/pull/1656>`_).
+  Thanks `@kwesolowski (Krzysztof Wesolowski)
+  <https://github.com/kwesolowski>`_.
+
+* Replaced ``FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION`` with the ``FMT_FUZZ``
+  macro to prevent interferring with fuzzing of projects using {fmt}
+  (`#1650 <https://github.com/fmtlib/fmt/pull/1650>`_).
+  Thanks `@asraa (Asra Ali) <https://github.com/asraa>`_.
+
+* Fixed compatibility with emscripten
+  (`#1636 <https://github.com/fmtlib/fmt/issues/1636>`_,
+  `#1637 <https://github.com/fmtlib/fmt/pull/1637>`_).
+  Thanks `@ArthurSonzogni (Arthur Sonzogni)
+  <https://github.com/ArthurSonzogni>`_.
+
+* Improved documentation
+  (`#704 <https://github.com/fmtlib/fmt/issues/704>`_,
+  `#1643 <https://github.com/fmtlib/fmt/pull/1643>`_,
+  `#1660 <https://github.com/fmtlib/fmt/pull/1660>`_,
+  `#1681 <https://github.com/fmtlib/fmt/pull/1681>`_,
+  `#1691 <https://github.com/fmtlib/fmt/pull/1691>`_,
+  `#1706 <https://github.com/fmtlib/fmt/pull/1706>`_,
+  `#1714 <https://github.com/fmtlib/fmt/pull/1714>`_,
+  `#1721 <https://github.com/fmtlib/fmt/pull/1721>`_,
+  `#1739 <https://github.com/fmtlib/fmt/pull/1739>`_,
+  `#1740 <https://github.com/fmtlib/fmt/pull/1740>`_,
+  `#1741 <https://github.com/fmtlib/fmt/pull/1741>`_,
+  `#1751 <https://github.com/fmtlib/fmt/pull/1751>`_).
+  Thanks `@senior7515 (Alexander Gallego) <https://github.com/senior7515>`_,
+  `@lsr0 (Lindsay Roberts) <https://github.com/lsr0>`_,
+  `@puetzk (Kevin Puetz) <https://github.com/puetzk>`_,
+  `@fpelliccioni (Fernando Pelliccioni) <https://github.com/fpelliccioni>`_,
+  Alexey Kuzmenko, `@jelly (jelle van der Waa) <https://github.com/jelly>`_,
+  `@claremacrae (Clare Macrae) <https://github.com/claremacrae>`_,
+  `@jiapengwen (文佳鹏) <https://github.com/jiapengwen>`_,
+  `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
+  `@alexey-milovidov <https://github.com/alexey-milovidov>`_.
+
+* Implemented various build configuration fixes and improvements
+  (`#1603 <https://github.com/fmtlib/fmt/pull/1603>`_,
+  `#1657 <https://github.com/fmtlib/fmt/pull/1657>`_,
+  `#1702 <https://github.com/fmtlib/fmt/pull/1702>`_,
+  `#1728 <https://github.com/fmtlib/fmt/pull/1728>`_).
+  Thanks `@scramsby (Scott Ramsby) <https://github.com/scramsby>`_,
+  `@jtojnar (Jan Tojnar) <https://github.com/jtojnar>`_,
+  `@orivej (Orivej Desh) <https://github.com/orivej>`_,
+  `@flagarde <https://github.com/flagarde>`_.
+
+* Fixed various warnings and compilation issues
+  (`#1616 <https://github.com/fmtlib/fmt/pull/1616>`_,
+  `#1620 <https://github.com/fmtlib/fmt/issues/1620>`_,
+  `#1622 <https://github.com/fmtlib/fmt/issues/1622>`_,
+  `#1625 <https://github.com/fmtlib/fmt/issues/1625>`_,
+  `#1627 <https://github.com/fmtlib/fmt/pull/1627>`_,
+  `#1628 <https://github.com/fmtlib/fmt/issues/1628>`_,
+  `#1629 <https://github.com/fmtlib/fmt/pull/1629>`_,
+  `#1631 <https://github.com/fmtlib/fmt/issues/1631>`_,
+  `#1633 <https://github.com/fmtlib/fmt/pull/1633>`_,
+  `#1649 <https://github.com/fmtlib/fmt/pull/1649>`_,
+  `#1658 <https://github.com/fmtlib/fmt/issues/1658>`_,
+  `#1661 <https://github.com/fmtlib/fmt/pull/1661>`_,
+  `#1667 <https://github.com/fmtlib/fmt/pull/1667>`_,
+  `#1668 <https://github.com/fmtlib/fmt/issues/1668>`_,
+  `#1669 <https://github.com/fmtlib/fmt/pull/1669>`_,
+  `#1692 <https://github.com/fmtlib/fmt/issues/1692>`_,
+  `#1696 <https://github.com/fmtlib/fmt/pull/1696>`_,
+  `#1697 <https://github.com/fmtlib/fmt/pull/1697>`_,
+  `#1707 <https://github.com/fmtlib/fmt/issues/1707>`_,
+  `#1712 <https://github.com/fmtlib/fmt/pull/1712>`_,
+  `#1716 <https://github.com/fmtlib/fmt/pull/1716>`_,
+  `#1722 <https://github.com/fmtlib/fmt/pull/1722>`_,
+  `#1724 <https://github.com/fmtlib/fmt/issues/1724>`_,
+  `#1729 <https://github.com/fmtlib/fmt/pull/1729>`_,
+  `#1738 <https://github.com/fmtlib/fmt/pull/1738>`_,
+  `#1742 <https://github.com/fmtlib/fmt/issues/1742>`_,
+  `#1743 <https://github.com/fmtlib/fmt/issues/1743>`_,
+  `#1744 <https://github.com/fmtlib/fmt/pull/1744>`_,
+  `#1747 <https://github.com/fmtlib/fmt/issues/1747>`_,
+  `#1750 <https://github.com/fmtlib/fmt/pull/1750>`_).
+  Thanks `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
+  `@gabime (Gabi Melman) <https://github.com/gabime>`_,
+  `@johnor (Johan) <https://github.com/johnor>`_,
+  `@Kurkin (Dmitry Kurkin) <https://github.com/Kurkin>`_,
+  `@invexed (James Beach) <https://github.com/invexed>`_,
+  `@peterbell10 <https://github.com/peterbell10>`_,
+  `@daixtrose (Markus Werle) <https://github.com/daixtrose>`_,
+  `@petrutlucian94 (Lucian Petrut) <https://github.com/petrutlucian94>`_,
+  `@Neargye (Daniil Goncharov) <https://github.com/Neargye>`_,
+  `@ambitslix (Attila M. Szilagyi) <https://github.com/ambitslix>`_,
+  `@gabime (Gabi Melman) <https://github.com/gabime>`_,
+  `@erthink (Leonid Yuriev) <https://github.com/erthink>`_,
+  `@tohammer (Tobias Hammer) <https://github.com/tohammer>`_,
+  `@0x8000-0000 (Florin Iucha) <https://github.com/0x8000-0000>`_.
+
+6.2.1 - 2020-05-09
+------------------
+
+* Fixed ostream support in ``sprintf``
+  (`#1631 <https://github.com/fmtlib/fmt/issues/1631>`_).
+
+* Fixed type detection when using implicit conversion to ``string_view`` and
+  ostream ``operator<<`` inconsistently
+  (`#1662 <https://github.com/fmtlib/fmt/issues/1662>`_).
+
+6.2.0 - 2020-04-05
+------------------
+
+* Improved error reporting when trying to format an object of a non-formattable
+  type:
+
+  .. code:: c++
+
+     fmt::format("{}", S());
+
+  now gives::
+
+    include/fmt/core.h:1015:5: error: static_assert failed due to requirement
+    'formattable' "Cannot format argument. To make type T formattable provide a
+    formatter<T> specialization:
+    https://fmt.dev/latest/api.html#formatting-user-defined-types"
+        static_assert(
+        ^
+    ...
+    note: in instantiation of function template specialization
+    'fmt::v6::format<char [3], S, char>' requested here
+      fmt::format("{}", S());
+           ^
+
+  if ``S`` is not formattable.
+
+* Reduced the library size by ~10%.
+
+* Always print decimal point if ``#`` is specified
+  (`#1476 <https://github.com/fmtlib/fmt/issues/1476>`_,
+  `#1498 <https://github.com/fmtlib/fmt/issues/1498>`_):
+
+  .. code:: c++
+
+     fmt::print("{:#.0f}", 42.0);
+
+  now prints ``42.``
+
+* Implemented the ``'L'`` specifier for locale-specific numeric formatting to
+  improve compatibility with ``std::format``. The ``'n'`` specifier is now
+  deprecated and will be removed in the next major release.
+
+* Moved OS-specific APIs such as ``windows_error`` from ``fmt/format.h`` to
+  ``fmt/os.h``. You can define ``FMT_DEPRECATED_INCLUDE_OS`` to automatically
+  include ``fmt/os.h`` from ``fmt/format.h`` for compatibility but this will be
+  disabled in the next major release.
+
+* Added precision overflow detection in floating-point formatting.
+
+* Implemented detection of invalid use of ``fmt::arg``.
+
+* Used ``type_identity`` to block unnecessary template argument deduction.
+  Thanks Tim Song.
+
+* Improved UTF-8 handling
+  (`#1109 <https://github.com/fmtlib/fmt/issues/1109>`_):
+
+  .. code:: c++
+
+     fmt::print("┌{0:─^{2}}┐\n"
+                "│{1: ^{2}}│\n"
+                "└{0:─^{2}}┘\n", "", "Привет, мир!", 20);
+
+  now prints::
+
+     ┌────────────────────┐
+     │    Привет, мир!    │
+     └────────────────────┘
+
+  on systems that support Unicode.
+
+* Added experimental dynamic argument storage
+  (`#1170 <https://github.com/fmtlib/fmt/issues/1170>`_,
+  `#1584 <https://github.com/fmtlib/fmt/pull/1584>`_):
+
+  .. code:: c++
+
+     fmt::dynamic_format_arg_store<fmt::format_context> store;
+     store.push_back("answer");
+     store.push_back(42);
+     fmt::vprint("The {} is {}.\n", store);
+  
+  prints::
+
+     The answer is 42.
+
+  Thanks `@vsolontsov-ll (Vladimir Solontsov)
+  <https://github.com/vsolontsov-ll>`_.
+
+* Made ``fmt::join`` accept ``initializer_list``
+  (`#1591 <https://github.com/fmtlib/fmt/pull/1591>`_).
+  Thanks `@Rapotkinnik (Nikolay Rapotkin) <https://github.com/Rapotkinnik>`_.
+
+* Fixed handling of empty tuples
+  (`#1588 <https://github.com/fmtlib/fmt/issues/1588>`_).
+
+* Fixed handling of output iterators in ``format_to_n``
+  (`#1506 <https://github.com/fmtlib/fmt/issues/1506>`_).
+
+* Fixed formatting of ``std::chrono::duration`` types to wide output
+  (`#1533 <https://github.com/fmtlib/fmt/pull/1533>`_).
+  Thanks `@zeffy (pilao) <https://github.com/zeffy>`_.
+
+* Added const ``begin`` and ``end`` overload to buffers
+  (`#1553 <https://github.com/fmtlib/fmt/pull/1553>`_).
+  Thanks `@dominicpoeschko <https://github.com/dominicpoeschko>`_.
+
+* Added the ability to disable floating-point formatting via ``FMT_USE_FLOAT``,
+  ``FMT_USE_DOUBLE`` and ``FMT_USE_LONG_DOUBLE`` macros for extremely
+  memory-constrained embedded system
+  (`#1590 <https://github.com/fmtlib/fmt/pull/1590>`_).
+  Thanks `@albaguirre (Alberto Aguirre) <https://github.com/albaguirre>`_.
+
+* Made ``FMT_STRING`` work with ``constexpr`` ``string_view``
+  (`#1589 <https://github.com/fmtlib/fmt/pull/1589>`_).
+  Thanks `@scramsby (Scott Ramsby) <https://github.com/scramsby>`_.
+
+* Implemented a minor optimization in the format string parser
+  (`#1560 <https://github.com/fmtlib/fmt/pull/1560>`_).
+  Thanks `@IkarusDeveloper <https://github.com/IkarusDeveloper>`_.
+
+* Improved attribute detection
+  (`#1469 <https://github.com/fmtlib/fmt/pull/1469>`_,
+  `#1475 <https://github.com/fmtlib/fmt/pull/1475>`_,
+  `#1576 <https://github.com/fmtlib/fmt/pull/1576>`_).
+  Thanks `@federico-busato (Federico) <https://github.com/federico-busato>`_,
+  `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_,
+  `@refnum <https://github.com/refnum>`_.
+
+* Improved documentation
+  (`#1481 <https://github.com/fmtlib/fmt/pull/1481>`_,
+  `#1523 <https://github.com/fmtlib/fmt/pull/1523>`_).
+  Thanks `@JackBoosY (Jack·Boos·Yu) <https://github.com/JackBoosY>`_,
+  `@imba-tjd (谭九鼎) <https://github.com/imba-tjd>`_.
+
+* Fixed symbol visibility on Linux when compiling with ``-fvisibility=hidden``
+  (`#1535 <https://github.com/fmtlib/fmt/pull/1535>`_).
+  Thanks `@milianw (Milian Wolff) <https://github.com/milianw>`_.
+
+* Implemented various build configuration fixes and improvements
+  (`#1264 <https://github.com/fmtlib/fmt/issues/1264>`_,
+  `#1460 <https://github.com/fmtlib/fmt/issues/1460>`_,
+  `#1534 <https://github.com/fmtlib/fmt/pull/1534>`_,
+  `#1536 <https://github.com/fmtlib/fmt/issues/1536>`_,
+  `#1545 <https://github.com/fmtlib/fmt/issues/1545>`_,
+  `#1546 <https://github.com/fmtlib/fmt/pull/1546>`_,
+  `#1566 <https://github.com/fmtlib/fmt/issues/1566>`_,
+  `#1582 <https://github.com/fmtlib/fmt/pull/1582>`_,
+  `#1597 <https://github.com/fmtlib/fmt/issues/1597>`_,
+  `#1598 <https://github.com/fmtlib/fmt/pull/1598>`_).
+  Thanks `@ambitslix (Attila M. Szilagyi) <https://github.com/ambitslix>`_,
+  `@jwillikers (Jordan Williams) <https://github.com/jwillikers>`_,
+  `@stac47 (Laurent Stacul) <https://github.com/stac47>`_.
+
+* Fixed various warnings and compilation issues
+  (`#1433 <https://github.com/fmtlib/fmt/pull/1433>`_,
+  `#1461 <https://github.com/fmtlib/fmt/issues/1461>`_,
+  `#1470 <https://github.com/fmtlib/fmt/pull/1470>`_,
+  `#1480 <https://github.com/fmtlib/fmt/pull/1480>`_,
+  `#1485 <https://github.com/fmtlib/fmt/pull/1485>`_,
+  `#1492 <https://github.com/fmtlib/fmt/pull/1492>`_,
+  `#1493 <https://github.com/fmtlib/fmt/issues/1493>`_,
+  `#1504 <https://github.com/fmtlib/fmt/issues/1504>`_,
+  `#1505 <https://github.com/fmtlib/fmt/pull/1505>`_,
+  `#1512 <https://github.com/fmtlib/fmt/pull/1512>`_,
+  `#1515 <https://github.com/fmtlib/fmt/issues/1515>`_,
+  `#1516 <https://github.com/fmtlib/fmt/pull/1516>`_,
+  `#1518 <https://github.com/fmtlib/fmt/pull/1518>`_,
+  `#1519 <https://github.com/fmtlib/fmt/pull/1519>`_,
+  `#1520 <https://github.com/fmtlib/fmt/pull/1520>`_,
+  `#1521 <https://github.com/fmtlib/fmt/pull/1521>`_,
+  `#1522 <https://github.com/fmtlib/fmt/pull/1522>`_,
+  `#1524 <https://github.com/fmtlib/fmt/issues/1524>`_,
+  `#1530 <https://github.com/fmtlib/fmt/pull/1530>`_,
+  `#1531 <https://github.com/fmtlib/fmt/issues/1531>`_,
+  `#1532 <https://github.com/fmtlib/fmt/pull/1532>`_,
+  `#1539 <https://github.com/fmtlib/fmt/issues/1539>`_,
+  `#1547 <https://github.com/fmtlib/fmt/issues/1547>`_,
+  `#1548 <https://github.com/fmtlib/fmt/issues/1548>`_,
+  `#1554 <https://github.com/fmtlib/fmt/pull/1554>`_,
+  `#1567 <https://github.com/fmtlib/fmt/issues/1567>`_,
+  `#1568 <https://github.com/fmtlib/fmt/pull/1568>`_,
+  `#1569 <https://github.com/fmtlib/fmt/pull/1569>`_,
+  `#1571 <https://github.com/fmtlib/fmt/pull/1571>`_,
+  `#1573 <https://github.com/fmtlib/fmt/pull/1573>`_,
+  `#1575 <https://github.com/fmtlib/fmt/pull/1575>`_,
+  `#1581 <https://github.com/fmtlib/fmt/pull/1581>`_,
+  `#1583 <https://github.com/fmtlib/fmt/issues/1583>`_,
+  `#1586 <https://github.com/fmtlib/fmt/issues/1586>`_,
+  `#1587 <https://github.com/fmtlib/fmt/issues/1587>`_,
+  `#1594 <https://github.com/fmtlib/fmt/issues/1594>`_,
+  `#1596 <https://github.com/fmtlib/fmt/pull/1596>`_,
+  `#1604 <https://github.com/fmtlib/fmt/issues/1604>`_,
+  `#1606 <https://github.com/fmtlib/fmt/pull/1606>`_,
+  `#1607 <https://github.com/fmtlib/fmt/issues/1607>`_,
+  `#1609 <https://github.com/fmtlib/fmt/issues/1609>`_).
+  Thanks `@marti4d (Chris Martin) <https://github.com/marti4d>`_,
+  `@iPherian <https://github.com/iPherian>`_,
+  `@parkertomatoes <https://github.com/parkertomatoes>`_,
+  `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
+  `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_,
+  `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
+  `@torsten48 <https://github.com/torsten48>`_,
+  `@tohammer (Tobias Hammer) <https://github.com/tohammer>`_,
+  `@lefticus (Jason Turner) <https://github.com/lefticus>`_,
+  `@ryusakki (Haise) <https://github.com/ryusakki>`_,
+  `@adnsv (Alex Denisov) <https://github.com/adnsv>`_,
+  `@fghzxm <https://github.com/fghzxm>`_,
+  `@refnum <https://github.com/refnum>`_,
+  `@pramodk (Pramod Kumbhar) <https://github.com/pramodk>`_,
+  `@Spirrwell <https://github.com/Spirrwell>`_,
+  `@scramsby (Scott Ramsby) <https://github.com/scramsby>`_.
+
+6.1.2 - 2019-12-11
+------------------
+
+* Fixed ABI compatibility with ``libfmt.so.6.0.0``
+  (`#1471 <https://github.com/fmtlib/fmt/issues/1471>`_).
+
+* Fixed handling types convertible to ``std::string_view``
+  (`#1451 <https://github.com/fmtlib/fmt/pull/1451>`_).
+  Thanks `@denizevrenci (Deniz Evrenci) <https://github.com/denizevrenci>`_.
+
+* Made CUDA test an opt-in enabled via the ``FMT_CUDA_TEST`` CMake option.
+
+* Fixed sign conversion warnings
+  (`#1440 <https://github.com/fmtlib/fmt/pull/1440>`_).
+  Thanks `@0x8000-0000 (Florin Iucha) <https://github.com/0x8000-0000>`_.
+
+6.1.1 - 2019-12-04
+------------------
+
+* Fixed shared library build on Windows
+  (`#1443 <https://github.com/fmtlib/fmt/pull/1443>`_,
+  `#1445 <https://github.com/fmtlib/fmt/issues/1445>`_,
+  `#1446 <https://github.com/fmtlib/fmt/pull/1446>`_,
+  `#1450 <https://github.com/fmtlib/fmt/issues/1450>`_).
+  Thanks `@egorpugin (Egor Pugin) <https://github.com/egorpugin>`_,
+  `@bbolli (Beat Bolli) <https://github.com/bbolli>`_.
+
+* Added a missing decimal point in exponent notation with trailing zeros.
+
+* Removed deprecated ``format_arg_store::TYPES``.
+
+6.1.0 - 2019-12-01
+------------------
+
+* {fmt} now formats IEEE 754 ``float`` and ``double`` using the shortest decimal
+  representation with correct rounding by default:
+
+  .. code:: c++
+
+     #include <cmath>
+     #include <fmt/core.h>
+
+     int main() {
+       fmt::print("{}", M_PI);
+     }
+
+  prints ``3.141592653589793``.
+
+* Made the fast binary to decimal floating-point formatter the default,
+  simplified it and improved performance. {fmt} is now 15 times faster than
+  libc++'s ``std::ostringstream``, 11 times faster than ``printf`` and 10%
+  faster than double-conversion on `dtoa-benchmark
+  <https://github.com/fmtlib/dtoa-benchmark>`_:
+
+  ==================  =========  =======
+  Function            Time (ns)  Speedup
+  ==================  =========  =======
+  ostringstream        1,346.30    1.00x
+  ostrstream           1,195.74    1.13x
+  sprintf                995.08    1.35x
+  doubleconv              99.10   13.59x
+  fmt                     88.34   15.24x
+  ==================  =========  =======
+
+  .. image:: https://user-images.githubusercontent.com/576385/
+             69767160-cdaca400-112f-11ea-9fc5-347c9f83caad.png
+
+* {fmt} no longer converts ``float`` arguments to ``double``. In particular this
+  improves the default (shortest) representation of floats and makes
+  ``fmt::format`` consistent with ``std::format`` specs
+  (`#1336 <https://github.com/fmtlib/fmt/issues/1336>`_,
+  `#1353 <https://github.com/fmtlib/fmt/issues/1353>`_,
+  `#1360 <https://github.com/fmtlib/fmt/pull/1360>`_,
+  `#1361 <https://github.com/fmtlib/fmt/pull/1361>`_):
+
+  .. code:: c++
+
+     fmt::print("{}", 0.1f);
+
+  prints ``0.1`` instead of ``0.10000000149011612``.
+
+  Thanks `@orivej (Orivej Desh) <https://github.com/orivej>`_.
+
+* Made floating-point formatting output consistent with ``printf``/iostreams
+  (`#1376 <https://github.com/fmtlib/fmt/issues/1376>`_,
+  `#1417 <https://github.com/fmtlib/fmt/issues/1417>`_).
+
+* Added support for 128-bit integers
+  (`#1287 <https://github.com/fmtlib/fmt/pull/1287>`_):
+
+  .. code:: c++
+
+     fmt::print("{}", std::numeric_limits<__int128_t>::max());
+
+  prints ``170141183460469231731687303715884105727``.
+
+  Thanks `@denizevrenci (Deniz Evrenci) <https://github.com/denizevrenci>`_.
+
+* The overload of ``print`` that takes ``text_style`` is now atomic, i.e. the
+  output from different threads doesn't interleave
+  (`#1351 <https://github.com/fmtlib/fmt/pull/1351>`_).
+  Thanks `@tankiJong (Tanki Zhang) <https://github.com/tankiJong>`_.
+
+* Made compile time in the header-only mode ~20% faster by reducing the number
+  of template instantiations. ``wchar_t`` overload of ``vprint`` was moved from
+  ``fmt/core.h`` to ``fmt/format.h``.
+
+* Added an overload of ``fmt::join`` that works with tuples
+  (`#1322 <https://github.com/fmtlib/fmt/issues/1322>`_,
+  `#1330 <https://github.com/fmtlib/fmt/pull/1330>`_):
+
+  .. code:: c++
+
+     #include <tuple>
+     #include <fmt/ranges.h>
+
+     int main() {
+       std::tuple<char, int, float> t{'a', 1, 2.0f};
+       fmt::print("{}", t);
+     }
+
+  prints ``('a', 1, 2.0)``.
+
+  Thanks `@jeremyong (Jeremy Ong) <https://github.com/jeremyong>`_.
+
+* Changed formatting of octal zero with prefix from "00" to "0":
+
+  .. code:: c++
+
+     fmt::print("{:#o}", 0);
+
+  prints ``0``.
+
+* The locale is now passed to ostream insertion (``<<``) operators
+  (`#1406 <https://github.com/fmtlib/fmt/pull/1406>`_):
+
+  .. code:: c++
+
+     #include <fmt/locale.h>
+     #include <fmt/ostream.h>
+
+     struct S {
+       double value;
+     };
+
+     std::ostream& operator<<(std::ostream& os, S s) {
+       return os << s.value;
+     }
+
+     int main() {
+       auto s = fmt::format(std::locale("fr_FR.UTF-8"), "{}", S{0.42});
+       // s == "0,42"
+     }
+
+  Thanks `@dlaugt (Daniel Laügt) <https://github.com/dlaugt>`_.
+
+* Locale-specific number formatting now uses grouping
+  (`#1393 <https://github.com/fmtlib/fmt/issues/1393>`_
+  `#1394 <https://github.com/fmtlib/fmt/pull/1394>`_).
+  Thanks `@skrdaniel <https://github.com/skrdaniel>`_.
+
+* Fixed handling of types with deleted implicit rvalue conversion to
+  ``const char**`` (`#1421 <https://github.com/fmtlib/fmt/issues/1421>`_):
+
+  .. code:: c++
+
+     struct mystring {
+       operator const char*() const&;
+       operator const char*() &;
+       operator const char*() const&& = delete;
+       operator const char*() && = delete;
+     };
+     mystring str;
+     fmt::print("{}", str); // now compiles
+
+* Enums are now mapped to correct underlying types instead of ``int``
+  (`#1286 <https://github.com/fmtlib/fmt/pull/1286>`_).
+  Thanks `@agmt (Egor Seredin) <https://github.com/agmt>`_.
+
+* Enum classes are no longer implicitly converted to ``int``
+  (`#1424 <https://github.com/fmtlib/fmt/issues/1424>`_).
+
+* Added ``basic_format_parse_context`` for consistency with C++20
+  ``std::format`` and deprecated ``basic_parse_context``.
+
+* Fixed handling of UTF-8 in precision
+  (`#1389 <https://github.com/fmtlib/fmt/issues/1389>`_,
+  `#1390 <https://github.com/fmtlib/fmt/pull/1390>`_).
+  Thanks `@tajtiattila (Attila Tajti) <https://github.com/tajtiattila>`_.
+
+* {fmt} can now be installed on Linux, macOS and Windows with
+  `Conda <https://docs.conda.io/en/latest/>`__ using its
+  `conda-forge <https://conda-forge.org>`__
+  `package <https://github.com/conda-forge/fmt-feedstock>`__
+  (`#1410 <https://github.com/fmtlib/fmt/pull/1410>`_)::
+
+    conda install -c conda-forge fmt
+
+  Thanks `@tdegeus (Tom de Geus) <https://github.com/tdegeus>`_.
+
+* Added a CUDA test (`#1285 <https://github.com/fmtlib/fmt/pull/1285>`_,
+  `#1317 <https://github.com/fmtlib/fmt/pull/1317>`_).
+  Thanks `@luncliff (Park DongHa) <https://github.com/luncliff>`_ and
+  `@risa2000 <https://github.com/risa2000>`_.
+
+* Improved documentation (`#1276 <https://github.com/fmtlib/fmt/pull/1276>`_,
+  `#1291 <https://github.com/fmtlib/fmt/issues/1291>`_,
+  `#1296 <https://github.com/fmtlib/fmt/issues/1296>`_,
+  `#1315 <https://github.com/fmtlib/fmt/pull/1315>`_,
+  `#1332 <https://github.com/fmtlib/fmt/pull/1332>`_,
+  `#1337 <https://github.com/fmtlib/fmt/pull/1337>`_,
+  `#1395 <https://github.com/fmtlib/fmt/issues/1395>`_
+  `#1418 <https://github.com/fmtlib/fmt/pull/1418>`_).
+  Thanks
+  `@waywardmonkeys (Bruce Mitchener) <https://github.com/waywardmonkeys>`_,
+  `@pauldreik (Paul Dreik) <https://github.com/pauldreik>`_,
+  `@jackoalan (Jack Andersen) <https://github.com/jackoalan>`_.
+
+* Various code improvements
+  (`#1358 <https://github.com/fmtlib/fmt/pull/1358>`_,
+  `#1407 <https://github.com/fmtlib/fmt/pull/1407>`_).
+  Thanks `@orivej (Orivej Desh) <https://github.com/orivej>`_,
+  `@dpacbach (David P. Sicilia) <https://github.com/dpacbach>`_,
+
+* Fixed compile-time format string checks for user-defined types
+  (`#1292 <https://github.com/fmtlib/fmt/issues/1292>`_).
+
+* Worked around a false positive in ``unsigned-integer-overflow`` sanitizer
+  (`#1377 <https://github.com/fmtlib/fmt/issues/1377>`_).
+
+* Fixed various warnings and compilation issues
+  (`#1273 <https://github.com/fmtlib/fmt/issues/1273>`_,
+  `#1278 <https://github.com/fmtlib/fmt/pull/1278>`_,
+  `#1280 <https://github.com/fmtlib/fmt/pull/1280>`_,
+  `#1281 <https://github.com/fmtlib/fmt/issues/1281>`_,
+  `#1288 <https://github.com/fmtlib/fmt/issues/1288>`_,
+  `#1290 <https://github.com/fmtlib/fmt/pull/1290>`_,
+  `#1301 <https://github.com/fmtlib/fmt/pull/1301>`_,
+  `#1305 <https://github.com/fmtlib/fmt/issues/1305>`_,
+  `#1306 <https://github.com/fmtlib/fmt/issues/1306>`_,
+  `#1309 <https://github.com/fmtlib/fmt/issues/1309>`_,
+  `#1312 <https://github.com/fmtlib/fmt/pull/1312>`_,
+  `#1313 <https://github.com/fmtlib/fmt/issues/1313>`_,
+  `#1316 <https://github.com/fmtlib/fmt/issues/1316>`_,
+  `#1319 <https://github.com/fmtlib/fmt/issues/1319>`_,
+  `#1320 <https://github.com/fmtlib/fmt/pull/1320>`_,
+  `#1326 <https://github.com/fmtlib/fmt/pull/1326>`_,
+  `#1328 <https://github.com/fmtlib/fmt/pull/1328>`_,
+  `#1344 <https://github.com/fmtlib/fmt/issues/1344>`_,
+  `#1345 <https://github.com/fmtlib/fmt/pull/1345>`_,
+  `#1347 <https://github.com/fmtlib/fmt/pull/1347>`_,
+  `#1349 <https://github.com/fmtlib/fmt/pull/1349>`_,
+  `#1354 <https://github.com/fmtlib/fmt/issues/1354>`_,
+  `#1362 <https://github.com/fmtlib/fmt/issues/1362>`_,
+  `#1366 <https://github.com/fmtlib/fmt/issues/1366>`_,
+  `#1364 <https://github.com/fmtlib/fmt/pull/1364>`_,
+  `#1370 <https://github.com/fmtlib/fmt/pull/1370>`_,
+  `#1371 <https://github.com/fmtlib/fmt/pull/1371>`_,
+  `#1385 <https://github.com/fmtlib/fmt/issues/1385>`_,
+  `#1388 <https://github.com/fmtlib/fmt/issues/1388>`_,
+  `#1397 <https://github.com/fmtlib/fmt/pull/1397>`_,
+  `#1414 <https://github.com/fmtlib/fmt/pull/1414>`_,
+  `#1416 <https://github.com/fmtlib/fmt/pull/1416>`_,
+  `#1422 <https://github.com/fmtlib/fmt/issues/1422>`_
+  `#1427 <https://github.com/fmtlib/fmt/pull/1427>`_,
+  `#1431 <https://github.com/fmtlib/fmt/issues/1431>`_,
+  `#1433 <https://github.com/fmtlib/fmt/pull/1433>`_).
+  Thanks `@hhb <https://github.com/hhb>`_,
+  `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
+  `@gabime (Gabi Melman) <https://github.com/gabime>`_,
+  `@neheb (Rosen Penev) <https://github.com/neheb>`_,
+  `@vedranmiletic (Vedran Miletić) <https://github.com/vedranmiletic>`_,
+  `@dkavolis (Daumantas Kavolis) <https://github.com/dkavolis>`_,
+  `@mwinterb <https://github.com/mwinterb>`_,
+  `@orivej (Orivej Desh) <https://github.com/orivej>`_,
+  `@denizevrenci (Deniz Evrenci) <https://github.com/denizevrenci>`_
+  `@leonklingele <https://github.com/leonklingele>`_,
+  `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_,
+  `@kent-tri <https://github.com/kent-tri>`_,
+  `@0x8000-0000 (Florin Iucha) <https://github.com/0x8000-0000>`_,
+  `@marti4d (Chris Martin) <https://github.com/marti4d>`_.
+
+6.0.0 - 2019-08-26
+------------------
+
+* Switched to the `MIT license
+  <https://github.com/fmtlib/fmt/blob/5a4b24613ba16cc689977c3b5bd8274a3ba1dd1f/LICENSE.rst>`_
+  with an optional exception that allows distributing binary code without
+  attribution.
+
+* Floating-point formatting is now locale-independent by default:
+
+  .. code:: c++
+
+     #include <locale>
+     #include <fmt/core.h>
+
+     int main() {
+       std::locale::global(std::locale("ru_RU.UTF-8"));
+       fmt::print("value = {}", 4.2);
+     }
+
+  prints "value = 4.2" regardless of the locale.
+
+  For locale-specific formatting use the ``n`` specifier:
+
+  .. code:: c++
+
+     std::locale::global(std::locale("ru_RU.UTF-8"));
+     fmt::print("value = {:n}", 4.2);
+
+  prints "value = 4,2".
+
+* Added an experimental Grisu floating-point formatting algorithm
+  implementation (disabled by default). To enable it compile with the
+  ``FMT_USE_GRISU`` macro defined to 1:
+
+  .. code:: c++
+
+     #define FMT_USE_GRISU 1
+     #include <fmt/format.h>
+
+     auto s = fmt::format("{}", 4.2); // formats 4.2 using Grisu
+
+  With Grisu enabled, {fmt} is 13x faster than ``std::ostringstream`` (libc++)
+  and 10x faster than ``sprintf`` on `dtoa-benchmark
+  <https://github.com/fmtlib/dtoa-benchmark>`_ (`full results
+  <https://fmt.dev/unknown_mac64_clang10.0.html>`_):
+
+  .. image:: https://user-images.githubusercontent.com/576385/
+             54883977-9fe8c000-4e28-11e9-8bde-272d122e7c52.jpg
+
+* Separated formatting and parsing contexts for consistency with
+  `C++20 std::format <http://eel.is/c++draft/format>`_, removing the
+  undocumented ``basic_format_context::parse_context()`` function.
+
+* Added `oss-fuzz <https://github.com/google/oss-fuzz>`_ support
+  (`#1199 <https://github.com/fmtlib/fmt/pull/1199>`_).
+  Thanks `@pauldreik (Paul Dreik) <https://github.com/pauldreik>`_.
+
+* ``formatter`` specializations now always take precedence over ``operator<<``
+  (`#952 <https://github.com/fmtlib/fmt/issues/952>`_):
+
+  .. code:: c++
+
+     #include <iostream>
+     #include <fmt/ostream.h>
+
+     struct S {};
+
+     std::ostream& operator<<(std::ostream& os, S) {
+       return os << 1;
+     }
+
+     template <>
+     struct fmt::formatter<S> : fmt::formatter<int> {
+       auto format(S, format_context& ctx) {
+         return formatter<int>::format(2, ctx);
+       }
+     };
+
+     int main() {
+       std::cout << S() << "\n"; // prints 1 using operator<<
+       fmt::print("{}\n", S());  // prints 2 using formatter
+     }
+
+* Introduced the experimental ``fmt::compile`` function that does format string
+  compilation (`#618 <https://github.com/fmtlib/fmt/issues/618>`_,
+  `#1169 <https://github.com/fmtlib/fmt/issues/1169>`_,
+  `#1171 <https://github.com/fmtlib/fmt/pull/1171>`_):
+
+  .. code:: c++
+
+     #include <fmt/compile.h>
+
+     auto f = fmt::compile<int>("{}");
+     std::string s = fmt::format(f, 42); // can be called multiple times to
+                                         // format different values
+     // s == "42"
+
+  It moves the cost of parsing a format string outside of the format function
+  which can be beneficial when identically formatting many objects of the same
+  types. Thanks `@stryku (Mateusz Janek) <https://github.com/stryku>`_.
+
+* Added experimental ``%`` format specifier that formats floating-point values
+  as percentages (`#1060 <https://github.com/fmtlib/fmt/pull/1060>`_,
+  `#1069 <https://github.com/fmtlib/fmt/pull/1069>`_,
+  `#1071 <https://github.com/fmtlib/fmt/pull/1071>`_):
+
+  .. code:: c++
+
+     auto s = fmt::format("{:.1%}", 0.42); // s == "42.0%"
+
+  Thanks `@gawain-bolton (Gawain Bolton) <https://github.com/gawain-bolton>`_.
+
+* Implemented precision for floating-point durations
+  (`#1004 <https://github.com/fmtlib/fmt/issues/1004>`_,
+  `#1012 <https://github.com/fmtlib/fmt/pull/1012>`_):
+
+  .. code:: c++
+
+     auto s = fmt::format("{:.1}", std::chrono::duration<double>(1.234));
+     // s == 1.2s
+
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
+
+* Implemented ``chrono`` format specifiers ``%Q`` and ``%q`` that give the value
+  and the unit respectively (`#1019 <https://github.com/fmtlib/fmt/pull/1019>`_):
+
+  .. code:: c++
+
+     auto value = fmt::format("{:%Q}", 42s); // value == "42"
+     auto unit  = fmt::format("{:%q}", 42s); // unit == "s"
+
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
+
+* Fixed handling of dynamic width in chrono formatter:
+
+  .. code:: c++
+
+     auto s = fmt::format("{0:{1}%H:%M:%S}", std::chrono::seconds(12345), 12);
+     //                        ^ width argument index                     ^ width
+     // s == "03:25:45    "
+
+  Thanks Howard Hinnant.
+
+* Removed deprecated ``fmt/time.h``. Use ``fmt/chrono.h`` instead.
+
+* Added ``fmt::format`` and ``fmt::vformat`` overloads that take ``text_style``
+  (`#993 <https://github.com/fmtlib/fmt/issues/993>`_,
+  `#994 <https://github.com/fmtlib/fmt/pull/994>`_):
+
+  .. code:: c++
+
+     #include <fmt/color.h>
+
+     std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red),
+                                       "The answer is {}.", 42);
+
+  Thanks `@Naios (Denis Blank) <https://github.com/Naios>`_.
+
+* Removed the deprecated color API (``print_colored``). Use the new API, namely
+  ``print`` overloads that take ``text_style`` instead.
+
+* Made ``std::unique_ptr`` and ``std::shared_ptr`` formattable as pointers via
+  ``fmt::ptr`` (`#1121 <https://github.com/fmtlib/fmt/pull/1121>`_):
+
+  .. code:: c++
+
+     std::unique_ptr<int> p = ...;
+     fmt::print("{}", fmt::ptr(p)); // prints p as a pointer
+
+  Thanks `@sighingnow (Tao He) <https://github.com/sighingnow>`_.
+
+* Made ``print`` and ``vprint`` report I/O errors
+  (`#1098 <https://github.com/fmtlib/fmt/issues/1098>`_,
+  `#1099 <https://github.com/fmtlib/fmt/pull/1099>`_).
+  Thanks `@BillyDonahue (Billy Donahue) <https://github.com/BillyDonahue>`_.
+
+* Marked deprecated APIs with the ``[[deprecated]]`` attribute and removed
+  internal uses of deprecated APIs
+  (`#1022 <https://github.com/fmtlib/fmt/pull/1022>`_).
+  Thanks `@eliaskosunen (Elias Kosunen) <https://github.com/eliaskosunen>`_.
+
+* Modernized the codebase using more C++11 features and removing workarounds.
+  Most importantly, ``buffer_context`` is now an alias template, so
+  use ``buffer_context<T>`` instead of ``buffer_context<T>::type``.
+  These features require GCC 4.8 or later.
+
+* ``formatter`` specializations now always take precedence over implicit
+  conversions to ``int`` and the undocumented ``convert_to_int`` trait
+  is now deprecated.
+
+* Moved the undocumented ``basic_writer``, ``writer``, and ``wwriter`` types
+  to the ``internal`` namespace.
+
+* Removed deprecated ``basic_format_context::begin()``. Use ``out()`` instead.
+
+* Disallowed passing the result of ``join`` as an lvalue to prevent misuse.
+
+* Refactored the undocumented structs that represent parsed format specifiers
+  to simplify the API and allow multibyte fill.
+
+* Moved SFINAE to template parameters to reduce symbol sizes.
+
+* Switched to ``fputws`` for writing wide strings so that it's no longer
+  required to call ``_setmode`` on Windows
+  (`#1229 <https://github.com/fmtlib/fmt/issues/1229>`_,
+  `#1243 <https://github.com/fmtlib/fmt/pull/1243>`_).
+  Thanks `@jackoalan (Jack Andersen) <https://github.com/jackoalan>`_.
+
+* Improved literal-based API
+  (`#1254 <https://github.com/fmtlib/fmt/pull/1254>`_).
+  Thanks `@sylveon (Charles Milette) <https://github.com/sylveon>`_.
+
+* Added support for exotic platforms without ``uintptr_t`` such as IBM i
+  (AS/400) which has 128-bit pointers and only 64-bit integers
+  (`#1059 <https://github.com/fmtlib/fmt/issues/1059>`_).
+
+* Added `Sublime Text syntax highlighting config
+  <https://github.com/fmtlib/fmt/blob/master/support/C%2B%2B.sublime-syntax>`_
+  (`#1037 <https://github.com/fmtlib/fmt/issues/1037>`_).
+  Thanks `@Kronuz (Germán Méndez Bravo) <https://github.com/Kronuz>`_.
+
+* Added the ``FMT_ENFORCE_COMPILE_STRING`` macro to enforce the use of
+  compile-time format strings
+  (`#1231 <https://github.com/fmtlib/fmt/pull/1231>`_).
+  Thanks `@jackoalan (Jack Andersen) <https://github.com/jackoalan>`_.
+
+* Stopped setting ``CMAKE_BUILD_TYPE`` if {fmt} is a subproject
+  (`#1081 <https://github.com/fmtlib/fmt/issues/1081>`_).
+
+* Various build improvements
+  (`#1039 <https://github.com/fmtlib/fmt/pull/1039>`_,
+  `#1078 <https://github.com/fmtlib/fmt/pull/1078>`_,
+  `#1091 <https://github.com/fmtlib/fmt/pull/1091>`_,
+  `#1103 <https://github.com/fmtlib/fmt/pull/1103>`_,
+  `#1177 <https://github.com/fmtlib/fmt/pull/1177>`_).
+  Thanks `@luncliff (Park DongHa) <https://github.com/luncliff>`_,
+  `@jasonszang (Jason Shuo Zang) <https://github.com/jasonszang>`_,
+  `@olafhering (Olaf Hering) <https://github.com/olafhering>`_,
+  `@Lecetem <https://github.com/Lectem>`_,
+  `@pauldreik (Paul Dreik) <https://github.com/pauldreik>`_.
+
+* Improved documentation
+  (`#1049 <https://github.com/fmtlib/fmt/issues/1049>`_,
+  `#1051 <https://github.com/fmtlib/fmt/pull/1051>`_,
+  `#1083 <https://github.com/fmtlib/fmt/pull/1083>`_,
+  `#1113 <https://github.com/fmtlib/fmt/pull/1113>`_,
+  `#1114 <https://github.com/fmtlib/fmt/pull/1114>`_,
+  `#1146 <https://github.com/fmtlib/fmt/issues/1146>`_,
+  `#1180 <https://github.com/fmtlib/fmt/issues/1180>`_,
+  `#1250 <https://github.com/fmtlib/fmt/pull/1250>`_,
+  `#1252 <https://github.com/fmtlib/fmt/pull/1252>`_,
+  `#1265 <https://github.com/fmtlib/fmt/pull/1265>`_).
+  Thanks `@mikelui (Michael Lui) <https://github.com/mikelui>`_,
+  `@foonathan (Jonathan Müller) <https://github.com/foonathan>`_,
+  `@BillyDonahue (Billy Donahue) <https://github.com/BillyDonahue>`_,
+  `@jwakely (Jonathan Wakely) <https://github.com/jwakely>`_,
+  `@kaisbe (Kais Ben Salah) <https://github.com/kaisbe>`_,
+  `@sdebionne (Samuel Debionne) <https://github.com/sdebionne>`_.
+
+* Fixed ambiguous formatter specialization in ``fmt/ranges.h``
+  (`#1123 <https://github.com/fmtlib/fmt/issues/1123>`_).
+
+* Fixed formatting of a non-empty ``std::filesystem::path`` which is an
+  infinitely deep range of its components
+  (`#1268 <https://github.com/fmtlib/fmt/issues/1268>`_).
+
+* Fixed handling of general output iterators when formatting characters
+  (`#1056 <https://github.com/fmtlib/fmt/issues/1056>`_,
+  `#1058 <https://github.com/fmtlib/fmt/pull/1058>`_).
+  Thanks `@abolz (Alexander Bolz) <https://github.com/abolz>`_.
+
+* Fixed handling of output iterators in ``formatter`` specialization for
+  ranges (`#1064 <https://github.com/fmtlib/fmt/issues/1064>`_).
+
+* Fixed handling of exotic character types
+  (`#1188 <https://github.com/fmtlib/fmt/issues/1188>`_).
+
+* Made chrono formatting work with exceptions disabled
+  (`#1062 <https://github.com/fmtlib/fmt/issues/1062>`_).
+
+* Fixed DLL visibility issues
+  (`#1134 <https://github.com/fmtlib/fmt/pull/1134>`_,
+  `#1147 <https://github.com/fmtlib/fmt/pull/1147>`_).
+  Thanks `@denchat <https://github.com/denchat>`_.
+
+* Disabled the use of UDL template extension on GCC 9
+  (`#1148 <https://github.com/fmtlib/fmt/issues/1148>`_).
+
+* Removed misplaced ``format`` compile-time checks from ``printf``
+  (`#1173 <https://github.com/fmtlib/fmt/issues/1173>`_).
+
+* Fixed issues in the experimental floating-point formatter
+  (`#1072 <https://github.com/fmtlib/fmt/issues/1072>`_,
+  `#1129 <https://github.com/fmtlib/fmt/issues/1129>`_,
+  `#1153 <https://github.com/fmtlib/fmt/issues/1153>`_,
+  `#1155 <https://github.com/fmtlib/fmt/pull/1155>`_,
+  `#1210 <https://github.com/fmtlib/fmt/issues/1210>`_,
+  `#1222 <https://github.com/fmtlib/fmt/issues/1222>`_).
+  Thanks `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_.
+
+* Fixed bugs discovered by fuzzing or during fuzzing integration
+  (`#1124 <https://github.com/fmtlib/fmt/issues/1124>`_,
+  `#1127 <https://github.com/fmtlib/fmt/issues/1127>`_,
+  `#1132 <https://github.com/fmtlib/fmt/issues/1132>`_,
+  `#1135 <https://github.com/fmtlib/fmt/pull/1135>`_,
+  `#1136 <https://github.com/fmtlib/fmt/issues/1136>`_,
+  `#1141 <https://github.com/fmtlib/fmt/issues/1141>`_,
+  `#1142 <https://github.com/fmtlib/fmt/issues/1142>`_,
+  `#1178 <https://github.com/fmtlib/fmt/issues/1178>`_,
+  `#1179 <https://github.com/fmtlib/fmt/issues/1179>`_,
+  `#1194 <https://github.com/fmtlib/fmt/issues/1194>`_).
+  Thanks `@pauldreik (Paul Dreik) <https://github.com/pauldreik>`_.
+
+* Fixed building tests on FreeBSD and Hurd
+  (`#1043 <https://github.com/fmtlib/fmt/issues/1043>`_).
+  Thanks `@jackyf (Eugene V. Lyubimkin) <https://github.com/jackyf>`_.
+
+* Fixed various warnings and compilation issues
+  (`#998 <https://github.com/fmtlib/fmt/pull/998>`_,
+  `#1006 <https://github.com/fmtlib/fmt/pull/1006>`_,
+  `#1008 <https://github.com/fmtlib/fmt/issues/1008>`_,
+  `#1011 <https://github.com/fmtlib/fmt/issues/1011>`_,
+  `#1025 <https://github.com/fmtlib/fmt/issues/1025>`_,
+  `#1027 <https://github.com/fmtlib/fmt/pull/1027>`_,
+  `#1028 <https://github.com/fmtlib/fmt/pull/1028>`_,
+  `#1029 <https://github.com/fmtlib/fmt/pull/1029>`_,
+  `#1030 <https://github.com/fmtlib/fmt/pull/1030>`_,
+  `#1031 <https://github.com/fmtlib/fmt/pull/1031>`_,
+  `#1054 <https://github.com/fmtlib/fmt/pull/1054>`_,
+  `#1063 <https://github.com/fmtlib/fmt/issues/1063>`_,
+  `#1068 <https://github.com/fmtlib/fmt/pull/1068>`_,
+  `#1074 <https://github.com/fmtlib/fmt/pull/1074>`_,
+  `#1075 <https://github.com/fmtlib/fmt/pull/1075>`_,
+  `#1079 <https://github.com/fmtlib/fmt/pull/1079>`_,
+  `#1086 <https://github.com/fmtlib/fmt/pull/1086>`_,
+  `#1088 <https://github.com/fmtlib/fmt/issues/1088>`_,
+  `#1089 <https://github.com/fmtlib/fmt/pull/1089>`_,
+  `#1094 <https://github.com/fmtlib/fmt/pull/1094>`_,
+  `#1101 <https://github.com/fmtlib/fmt/issues/1101>`_,
+  `#1102 <https://github.com/fmtlib/fmt/pull/1102>`_,
+  `#1105 <https://github.com/fmtlib/fmt/issues/1105>`_,
+  `#1107 <https://github.com/fmtlib/fmt/pull/1107>`_,
+  `#1115 <https://github.com/fmtlib/fmt/issues/1115>`_,
+  `#1117 <https://github.com/fmtlib/fmt/issues/1117>`_,
+  `#1118 <https://github.com/fmtlib/fmt/issues/1118>`_,
+  `#1120 <https://github.com/fmtlib/fmt/issues/1120>`_,
+  `#1123 <https://github.com/fmtlib/fmt/issues/1123>`_,
+  `#1139 <https://github.com/fmtlib/fmt/pull/1139>`_,
+  `#1140 <https://github.com/fmtlib/fmt/issues/1140>`_,
+  `#1143 <https://github.com/fmtlib/fmt/issues/1143>`_,
+  `#1144 <https://github.com/fmtlib/fmt/pull/1144>`_,
+  `#1150 <https://github.com/fmtlib/fmt/pull/1150>`_,
+  `#1151 <https://github.com/fmtlib/fmt/pull/1151>`_,
+  `#1152 <https://github.com/fmtlib/fmt/issues/1152>`_,
+  `#1154 <https://github.com/fmtlib/fmt/issues/1154>`_,
+  `#1156 <https://github.com/fmtlib/fmt/issues/1156>`_,
+  `#1159 <https://github.com/fmtlib/fmt/pull/1159>`_,
+  `#1175 <https://github.com/fmtlib/fmt/issues/1175>`_,
+  `#1181 <https://github.com/fmtlib/fmt/issues/1181>`_,
+  `#1186 <https://github.com/fmtlib/fmt/issues/1186>`_,
+  `#1187 <https://github.com/fmtlib/fmt/pull/1187>`_,
+  `#1191 <https://github.com/fmtlib/fmt/pull/1191>`_,
+  `#1197 <https://github.com/fmtlib/fmt/issues/1197>`_,
+  `#1200 <https://github.com/fmtlib/fmt/issues/1200>`_,
+  `#1203 <https://github.com/fmtlib/fmt/issues/1203>`_,
+  `#1205 <https://github.com/fmtlib/fmt/issues/1205>`_,
+  `#1206 <https://github.com/fmtlib/fmt/pull/1206>`_,
+  `#1213 <https://github.com/fmtlib/fmt/issues/1213>`_,
+  `#1214 <https://github.com/fmtlib/fmt/issues/1214>`_,
+  `#1217 <https://github.com/fmtlib/fmt/pull/1217>`_,
+  `#1228 <https://github.com/fmtlib/fmt/issues/1228>`_,
+  `#1230 <https://github.com/fmtlib/fmt/pull/1230>`_,
+  `#1232 <https://github.com/fmtlib/fmt/issues/1232>`_,
+  `#1235 <https://github.com/fmtlib/fmt/pull/1235>`_,
+  `#1236 <https://github.com/fmtlib/fmt/pull/1236>`_,
+  `#1240 <https://github.com/fmtlib/fmt/issues/1240>`_).
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
+  `@mwinterb <https://github.com/mwinterb>`_,
+  `@eliaskosunen (Elias Kosunen) <https://github.com/eliaskosunen>`_,
+  `@morinmorin <https://github.com/morinmorin>`_,
+  `@ricco19 (Brian Ricciardelli) <https://github.com/ricco19>`_,
+  `@waywardmonkeys (Bruce Mitchener) <https://github.com/waywardmonkeys>`_,
+  `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_,
+  `@remyabel <https://github.com/remyabel>`_,
+  `@pauldreik (Paul Dreik) <https://github.com/pauldreik>`_,
+  `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
+  `@rcane (Ronny Krüger) <https://github.com/rcane>`_,
+  `@mocabe <https://github.com/mocabe>`_,
+  `@denchat <https://github.com/denchat>`_,
+  `@cjdb (Christopher Di Bella) <https://github.com/cjdb>`_,
+  `@HazardyKnusperkeks (Björn Schäpers) <https://github.com/HazardyKnusperkeks>`_,
+  `@vedranmiletic (Vedran Miletić) <https://github.com/vedranmiletic>`_,
+  `@jackoalan (Jack Andersen) <https://github.com/jackoalan>`_,
+  `@DaanDeMeyer (Daan De Meyer) <https://github.com/DaanDeMeyer>`_,
+  `@starkmapper (Mark Stapper) <https://github.com/starkmapper>`_.
+
+5.3.0 - 2018-12-28
+------------------
+
+* Introduced experimental chrono formatting support:
+
+  .. code:: c++
+
+     #include <fmt/chrono.h>
+
+     int main() {
+       using namespace std::literals::chrono_literals;
+       fmt::print("Default format: {} {}\n", 42s, 100ms);
+       fmt::print("strftime-like format: {:%H:%M:%S}\n", 3h + 15min + 30s);
+     }
+
+  prints::
+
+     Default format: 42s 100ms
+     strftime-like format: 03:15:30
+
+* Added experimental support for emphasis (bold, italic, underline,
+  strikethrough), colored output to a file stream, and improved colored
+  formatting API
+  (`#961 <https://github.com/fmtlib/fmt/pull/961>`_,
+  `#967 <https://github.com/fmtlib/fmt/pull/967>`_,
+  `#973 <https://github.com/fmtlib/fmt/pull/973>`_):
+
+  .. code:: c++
+
+     #include <fmt/color.h>
+
+     int main() {
+       print(fg(fmt::color::crimson) | fmt::emphasis::bold,
+             "Hello, {}!\n", "world");
+       print(fg(fmt::color::floral_white) | bg(fmt::color::slate_gray) |
+             fmt::emphasis::underline, "Hello, {}!\n", "мир");
+       print(fg(fmt::color::steel_blue) | fmt::emphasis::italic,
+             "Hello, {}!\n", "世界");
+     }
+
+  prints the following on modern terminals with RGB color support:
+
+  .. image:: https://user-images.githubusercontent.com/576385/
+             50405788-b66e7500-076e-11e9-9592-7324d1f951d8.png
+
+  Thanks `@Rakete1111 (Nicolas) <https://github.com/Rakete1111>`_.
+
+* Added support for 4-bit terminal colors
+  (`#968 <https://github.com/fmtlib/fmt/issues/968>`_,
+  `#974 <https://github.com/fmtlib/fmt/pull/974>`_)
+
+  .. code:: c++
+
+     #include <fmt/color.h>
+
+     int main() {
+       print(fg(fmt::terminal_color::red), "stop\n");
+     }
+
+  Note that these colors vary by terminal:
+
+  .. image:: https://user-images.githubusercontent.com/576385/
+             50405925-dbfc7e00-0770-11e9-9b85-333fab0af9ac.png
+
+  Thanks `@Rakete1111 (Nicolas) <https://github.com/Rakete1111>`_.
+
+* Parameterized formatting functions on the type of the format string
+  (`#880 <https://github.com/fmtlib/fmt/issues/880>`_,
+  `#881 <https://github.com/fmtlib/fmt/pull/881>`_,
+  `#883 <https://github.com/fmtlib/fmt/pull/883>`_,
+  `#885 <https://github.com/fmtlib/fmt/pull/885>`_,
+  `#897 <https://github.com/fmtlib/fmt/pull/897>`_,
+  `#920 <https://github.com/fmtlib/fmt/issues/920>`_).
+  Any object of type ``S`` that has an overloaded ``to_string_view(const S&)``
+  returning ``fmt::string_view`` can be used as a format string:
+
+  .. code:: c++
+
+     namespace my_ns {
+     inline string_view to_string_view(const my_string& s) {
+       return {s.data(), s.length()};
+     }
+     }
+
+     std::string message = fmt::format(my_string("The answer is {}."), 42);
+
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
+
+* Made ``std::string_view`` work as a format string
+  (`#898 <https://github.com/fmtlib/fmt/pull/898>`_):
+
+  .. code:: c++
+
+     auto message = fmt::format(std::string_view("The answer is {}."), 42);
+
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
+
+* Added wide string support to compile-time format string checks
+  (`#924 <https://github.com/fmtlib/fmt/pull/924>`_):
+
+  .. code:: c++
+
+     print(fmt(L"{:f}"), 42); // compile-time error: invalid type specifier
+
+  Thanks `@XZiar <https://github.com/XZiar>`_.
+
+* Made colored print functions work with wide strings
+  (`#867 <https://github.com/fmtlib/fmt/pull/867>`_):
+
+  .. code:: c++
+
+     #include <fmt/color.h>
+
+     int main() {
+       print(fg(fmt::color::red), L"{}\n", 42);
+     }
+
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
+
+* Introduced experimental Unicode support
+  (`#628 <https://github.com/fmtlib/fmt/issues/628>`_,
+  `#891 <https://github.com/fmtlib/fmt/pull/891>`_):
+
+  .. code:: c++
+
+     using namespace fmt::literals;
+     auto s = fmt::format("{:*^5}"_u, "🤡"_u); // s == "**🤡**"_u
+
+* Improved locale support:
+
+  .. code:: c++
+
+     #include <fmt/locale.h>
+
+     struct numpunct : std::numpunct<char> {
+      protected:
+       char do_thousands_sep() const override { return '~'; }
+     };
+
+     std::locale loc;
+     auto s = fmt::format(std::locale(loc, new numpunct()), "{:n}", 1234567);
+     // s == "1~234~567"
+
+* Constrained formatting functions on proper iterator types
+  (`#921 <https://github.com/fmtlib/fmt/pull/921>`_).
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
+
+* Added ``make_printf_args`` and ``make_wprintf_args`` functions
+  (`#934 <https://github.com/fmtlib/fmt/pull/934>`_).
+  Thanks `@tnovotny <https://github.com/tnovotny>`_.
+
+* Deprecated ``fmt::visit``, ``parse_context``, and ``wparse_context``.
+  Use ``fmt::visit_format_arg``, ``format_parse_context``, and
+  ``wformat_parse_context`` instead.
+
+* Removed undocumented ``basic_fixed_buffer`` which has been superseded by the
+  iterator-based API
+  (`#873 <https://github.com/fmtlib/fmt/issues/873>`_,
+  `#902 <https://github.com/fmtlib/fmt/pull/902>`_).
+  Thanks `@superfunc (hollywood programmer) <https://github.com/superfunc>`_.
+
+* Disallowed repeated leading zeros in an argument ID:
+
+  .. code:: c++
+
+     fmt::print("{000}", 42); // error
+
+* Reintroduced support for gcc 4.4.
+
+* Fixed compilation on platforms with exotic ``double``
+  (`#878 <https://github.com/fmtlib/fmt/issues/878>`_).
+
+* Improved documentation
+  (`#164 <https://github.com/fmtlib/fmt/issues/164>`_,
+  `#877 <https://github.com/fmtlib/fmt/issues/877>`_,
+  `#901 <https://github.com/fmtlib/fmt/pull/901>`_,
+  `#906 <https://github.com/fmtlib/fmt/pull/906>`_,
+  `#979 <https://github.com/fmtlib/fmt/pull/979>`_).
+  Thanks `@kookjr (Mathew Cucuzella) <https://github.com/kookjr>`_,
+  `@DarkDimius (Dmitry Petrashko) <https://github.com/DarkDimius>`_,
+  `@HecticSerenity <https://github.com/HecticSerenity>`_.
+
+* Added pkgconfig support which makes it easier to consume the library from
+  meson and other build systems
+  (`#916 <https://github.com/fmtlib/fmt/pull/916>`_).
+  Thanks `@colemickens (Cole Mickens) <https://github.com/colemickens>`_.
+
+* Various build improvements
+  (`#909 <https://github.com/fmtlib/fmt/pull/909>`_,
+  `#926 <https://github.com/fmtlib/fmt/pull/926>`_,
+  `#937 <https://github.com/fmtlib/fmt/pull/937>`_,
+  `#953 <https://github.com/fmtlib/fmt/pull/953>`_,
+  `#959 <https://github.com/fmtlib/fmt/pull/959>`_).
+  Thanks `@tchaikov (Kefu Chai) <https://github.com/tchaikov>`_,
+  `@luncliff (Park DongHa) <https://github.com/luncliff>`_,
+  `@AndreasSchoenle (Andreas Schönle) <https://github.com/AndreasSchoenle>`_,
+  `@hotwatermorning <https://github.com/hotwatermorning>`_,
+  `@Zefz (JohanJansen) <https://github.com/Zefz>`_.
+
+* Improved ``string_view`` construction performance
+  (`#914 <https://github.com/fmtlib/fmt/pull/914>`_).
+  Thanks `@gabime (Gabi Melman) <https://github.com/gabime>`_.
+
+* Fixed non-matching char types
+  (`#895 <https://github.com/fmtlib/fmt/pull/895>`_).
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
+
+* Fixed ``format_to_n`` with ``std::back_insert_iterator``
+  (`#913 <https://github.com/fmtlib/fmt/pull/913>`_).
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
+
+* Fixed locale-dependent formatting
+  (`#905 <https://github.com/fmtlib/fmt/issues/905>`_).
+
+* Fixed various compiler warnings and errors
+  (`#882 <https://github.com/fmtlib/fmt/pull/882>`_,
+  `#886 <https://github.com/fmtlib/fmt/pull/886>`_,
+  `#933 <https://github.com/fmtlib/fmt/pull/933>`_,
+  `#941 <https://github.com/fmtlib/fmt/pull/941>`_,
+  `#931 <https://github.com/fmtlib/fmt/issues/931>`_,
+  `#943 <https://github.com/fmtlib/fmt/pull/943>`_,
+  `#954 <https://github.com/fmtlib/fmt/pull/954>`_,
+  `#956 <https://github.com/fmtlib/fmt/pull/956>`_,
+  `#962 <https://github.com/fmtlib/fmt/pull/962>`_,
+  `#965 <https://github.com/fmtlib/fmt/issues/965>`_,
+  `#977 <https://github.com/fmtlib/fmt/issues/977>`_,
+  `#983 <https://github.com/fmtlib/fmt/pull/983>`_,
+  `#989 <https://github.com/fmtlib/fmt/pull/989>`_).
+  Thanks `@Luthaf (Guillaume Fraux) <https://github.com/Luthaf>`_,
+  `@stevenhoving (Steven Hoving) <https://github.com/stevenhoving>`_,
+  `@christinaa (Kristina Brooks) <https://github.com/christinaa>`_,
+  `@lgritz (Larry Gritz) <https://github.com/lgritz>`_,
+  `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
+  `@0x8000-0000 (Sign Bit) <https://github.com/0x8000-0000>`_,
+  `@liuping1997 <https://github.com/liuping1997>`_.
+
+5.2.1 - 2018-09-21
+------------------
+
+* Fixed ``visit`` lookup issues on gcc 7 & 8
+  (`#870 <https://github.com/fmtlib/fmt/pull/870>`_).
+  Thanks `@medithe <https://github.com/medithe>`_.
+
+* Fixed linkage errors on older gcc.
+
+* Prevented ``fmt/range.h`` from specializing ``fmt::basic_string_view``
+  (`#865 <https://github.com/fmtlib/fmt/issues/865>`_,
+  `#868 <https://github.com/fmtlib/fmt/pull/868>`_).
+  Thanks `@hhggit (dual) <https://github.com/hhggit>`_.
+
+* Improved error message when formatting unknown types
+  (`#872 <https://github.com/fmtlib/fmt/pull/872>`_).
+  Thanks `@foonathan (Jonathan Müller) <https://github.com/foonathan>`_,
+
+* Disabled templated user-defined literals when compiled under nvcc
+  (`#875 <https://github.com/fmtlib/fmt/pull/875>`_).
+  Thanks `@CandyGumdrop (Candy Gumdrop) <https://github.com/CandyGumdrop>`_,
+
+* Fixed ``format_to`` formatting to ``wmemory_buffer``
+  (`#874 <https://github.com/fmtlib/fmt/issues/874>`_).
+
+5.2.0 - 2018-09-13
+------------------
+
+* Optimized format string parsing and argument processing which resulted in up
+  to 5x speed up on long format strings and significant performance boost on
+  various benchmarks. For example, version 5.2 is 2.22x faster than 5.1 on
+  decimal integer formatting with ``format_to`` (macOS, clang-902.0.39.2):
+
+  ==================  =======  =======
+  Method              Time, s  Speedup
+  ==================  =======  =======
+  fmt::format 5.1      0.58
+  fmt::format 5.2      0.35     1.66x
+  fmt::format_to 5.1   0.51
+  fmt::format_to 5.2   0.23     2.22x
+  sprintf              0.71
+  std::to_string       1.01
+  std::stringstream    1.73
+  ==================  =======  =======
+
+* Changed the ``fmt`` macro from opt-out to opt-in to prevent name collisions.
+  To enable it define the ``FMT_STRING_ALIAS`` macro to 1 before including
+  ``fmt/format.h``:
+
+  .. code:: c++
+
+     #define FMT_STRING_ALIAS 1
+     #include <fmt/format.h>
+     std::string answer = format(fmt("{}"), 42);
+
+* Added compile-time format string checks to ``format_to`` overload that takes
+  ``fmt::memory_buffer`` (`#783 <https://github.com/fmtlib/fmt/issues/783>`_):
+
+  .. code:: c++
+
+     fmt::memory_buffer buf;
+     // Compile-time error: invalid type specifier.
+     fmt::format_to(buf, fmt("{:d}"), "foo");
+
+* Moved experimental color support to ``fmt/color.h`` and enabled the
+  new API by default. The old API can be enabled by defining the
+  ``FMT_DEPRECATED_COLORS`` macro.
+
+* Added formatting support for types explicitly convertible to
+  ``fmt::string_view``:
+
+  .. code:: c++
+
+     struct foo {
+       explicit operator fmt::string_view() const { return "foo"; }
+     };
+     auto s = format("{}", foo());
+
+  In particular, this makes formatting function work with
+  ``folly::StringPiece``.
+
+* Implemented preliminary support for ``char*_t`` by replacing the ``format``
+  function overloads with a single function template parameterized on the string
+  type.
+
+* Added support for dynamic argument lists
+  (`#814 <https://github.com/fmtlib/fmt/issues/814>`_,
+  `#819 <https://github.com/fmtlib/fmt/pull/819>`_).
+  Thanks `@MikePopoloski (Michael Popoloski)
+  <https://github.com/MikePopoloski>`_.
+
+* Reduced executable size overhead for embedded targets using newlib nano by
+  making locale dependency optional
+  (`#839 <https://github.com/fmtlib/fmt/pull/839>`_).
+  Thanks `@teajay-fr (Thomas Benard) <https://github.com/teajay-fr>`_.
+
+* Keep ``noexcept`` specifier when exceptions are disabled
+  (`#801 <https://github.com/fmtlib/fmt/issues/801>`_,
+  `#810 <https://github.com/fmtlib/fmt/pull/810>`_).
+  Thanks `@qis (Alexej Harm) <https://github.com/qis>`_.
+
+* Fixed formatting of user-defined types providing ``operator<<`` with
+  ``format_to_n``
+  (`#806 <https://github.com/fmtlib/fmt/pull/806>`_).
+  Thanks `@mkurdej (Marek Kurdej) <https://github.com/mkurdej>`_.
+
+* Fixed dynamic linkage of new symbols
+  (`#808 <https://github.com/fmtlib/fmt/issues/808>`_).
+
+* Fixed global initialization issue
+  (`#807 <https://github.com/fmtlib/fmt/issues/807>`_):
+
+  .. code:: c++
+
+     // This works on compilers with constexpr support.
+     static const std::string answer = fmt::format("{}", 42);
+
+* Fixed various compiler warnings and errors
+  (`#804 <https://github.com/fmtlib/fmt/pull/804>`_,
+  `#809 <https://github.com/fmtlib/fmt/issues/809>`_,
+  `#811 <https://github.com/fmtlib/fmt/pull/811>`_,
+  `#822 <https://github.com/fmtlib/fmt/issues/822>`_,
+  `#827 <https://github.com/fmtlib/fmt/pull/827>`_,
+  `#830 <https://github.com/fmtlib/fmt/issues/830>`_,
+  `#838 <https://github.com/fmtlib/fmt/pull/838>`_,
+  `#843 <https://github.com/fmtlib/fmt/issues/843>`_,
+  `#844 <https://github.com/fmtlib/fmt/pull/844>`_,
+  `#851 <https://github.com/fmtlib/fmt/issues/851>`_,
+  `#852 <https://github.com/fmtlib/fmt/pull/852>`_,
+  `#854 <https://github.com/fmtlib/fmt/pull/854>`_).
+  Thanks `@henryiii (Henry Schreiner) <https://github.com/henryiii>`_,
+  `@medithe <https://github.com/medithe>`_, and
+  `@eliasdaler (Elias Daler) <https://github.com/eliasdaler>`_.
+
+5.1.0 - 2018-07-05
+------------------
+
+* Added experimental support for RGB color output enabled with
+  the ``FMT_EXTENDED_COLORS`` macro:
+
+  .. code:: c++
+
+     #define FMT_EXTENDED_COLORS
+     #define FMT_HEADER_ONLY // or compile fmt with FMT_EXTENDED_COLORS defined
+     #include <fmt/format.h>
+
+     fmt::print(fmt::color::steel_blue, "Some beautiful text");
+
+  The old API (the ``print_colored`` and ``vprint_colored`` functions and the
+  ``color`` enum) is now deprecated.
+  (`#762 <https://github.com/fmtlib/fmt/issues/762>`_
+  `#767 <https://github.com/fmtlib/fmt/pull/767>`_).
+  thanks `@Remotion (Remo) <https://github.com/Remotion>`_.
+
+* Added quotes to strings in ranges and tuples
+  (`#766 <https://github.com/fmtlib/fmt/pull/766>`_).
+  Thanks `@Remotion (Remo) <https://github.com/Remotion>`_.
+
+* Made ``format_to`` work with ``basic_memory_buffer``
+  (`#776 <https://github.com/fmtlib/fmt/issues/776>`_).
+
+* Added ``vformat_to_n`` and ``wchar_t`` overload of ``format_to_n``
+  (`#764 <https://github.com/fmtlib/fmt/issues/764>`_,
+  `#769 <https://github.com/fmtlib/fmt/issues/769>`_).
+
+* Made ``is_range`` and ``is_tuple_like`` part of public (experimental) API
+  to allow specialization for user-defined types
+  (`#751 <https://github.com/fmtlib/fmt/issues/751>`_,
+  `#759 <https://github.com/fmtlib/fmt/pull/759>`_).
+  Thanks `@drrlvn (Dror Levin) <https://github.com/drrlvn>`_.
+
+* Added more compilers to continuous integration and increased ``FMT_PEDANTIC``
+  warning levels
+  (`#736 <https://github.com/fmtlib/fmt/pull/736>`_).
+  Thanks `@eliaskosunen (Elias Kosunen) <https://github.com/eliaskosunen>`_.
+
+* Fixed compilation with MSVC 2013.
+
+* Fixed handling of user-defined types in ``format_to``
+  (`#793 <https://github.com/fmtlib/fmt/issues/793>`_).
+
+* Forced linking of inline ``vformat`` functions into the library
+  (`#795 <https://github.com/fmtlib/fmt/issues/795>`_).
+
+* Fixed incorrect call to on_align in ``'{:}='``
+  (`#750 <https://github.com/fmtlib/fmt/issues/750>`_).
+
+* Fixed floating-point formatting to a non-back_insert_iterator with sign &
+  numeric alignment specified
+  (`#756 <https://github.com/fmtlib/fmt/issues/756>`_).
+
+* Fixed formatting to an array with ``format_to_n``
+  (`#778 <https://github.com/fmtlib/fmt/issues/778>`_).
+
+* Fixed formatting of more than 15 named arguments
+  (`#754 <https://github.com/fmtlib/fmt/issues/754>`_).
+
+* Fixed handling of compile-time strings when including ``fmt/ostream.h``.
+  (`#768 <https://github.com/fmtlib/fmt/issues/768>`_).
+
+* Fixed various compiler warnings and errors
+  (`#742 <https://github.com/fmtlib/fmt/issues/742>`_,
+  `#748 <https://github.com/fmtlib/fmt/issues/748>`_,
+  `#752 <https://github.com/fmtlib/fmt/issues/752>`_,
+  `#770 <https://github.com/fmtlib/fmt/issues/770>`_,
+  `#775 <https://github.com/fmtlib/fmt/pull/775>`_,
+  `#779 <https://github.com/fmtlib/fmt/issues/779>`_,
+  `#780 <https://github.com/fmtlib/fmt/pull/780>`_,
+  `#790 <https://github.com/fmtlib/fmt/pull/790>`_,
+  `#792 <https://github.com/fmtlib/fmt/pull/792>`_,
+  `#800 <https://github.com/fmtlib/fmt/pull/800>`_).
+  Thanks `@Remotion (Remo) <https://github.com/Remotion>`_,
+  `@gabime (Gabi Melman) <https://github.com/gabime>`_,
+  `@foonathan (Jonathan Müller) <https://github.com/foonathan>`_,
+  `@Dark-Passenger (Dhruv Paranjape) <https://github.com/Dark-Passenger>`_, and
+  `@0x8000-0000 (Sign Bit) <https://github.com/0x8000-0000>`_.
+
+5.0.0 - 2018-05-21
+------------------
+
+* Added a requirement for partial C++11 support, most importantly variadic
+  templates and type traits, and dropped ``FMT_VARIADIC_*`` emulation macros.
+  Variadic templates are available since GCC 4.4, Clang 2.9 and MSVC 18.0 (2013).
+  For older compilers use {fmt} `version 4.x
+  <https://github.com/fmtlib/fmt/releases/tag/4.1.0>`_ which continues to be
+  maintained and works with C++98 compilers.
+
+* Renamed symbols to follow standard C++ naming conventions and proposed a subset
+  of the library for standardization in `P0645R2 Text Formatting
+  <https://wg21.link/P0645>`_.
+
+* Implemented ``constexpr`` parsing of format strings and `compile-time format
+  string checks
+  <https://fmt.dev/latest/api.html#compile-time-format-string-checks>`_. For
+  example
+
+  .. code:: c++
+
+     #include <fmt/format.h>
+
+     std::string s = format(fmt("{:d}"), "foo");
+
+  gives a compile-time error because ``d`` is an invalid specifier for strings
+  (`godbolt <https://godbolt.org/g/rnCy9Q>`__)::
+
+     ...
+     <source>:4:19: note: in instantiation of function template specialization 'fmt::v5::format<S, char [4]>' requested here
+       std::string s = format(fmt("{:d}"), "foo");
+                       ^
+     format.h:1337:13: note: non-constexpr function 'on_error' cannot be used in a constant expression
+         handler.on_error("invalid type specifier");
+
+  Compile-time checks require relaxed ``constexpr`` (C++14 feature) support. If
+  the latter is not available, checks will be performed at runtime.
+
+* Separated format string parsing and formatting in the extension API to enable
+  compile-time format string processing. For example
+
+  .. code:: c++
+
+     struct Answer {};
+
+     namespace fmt {
+     template <>
+     struct formatter<Answer> {
+       constexpr auto parse(parse_context& ctx) {
+         auto it = ctx.begin();
+         spec = *it;
+         if (spec != 'd' && spec != 's')
+           throw format_error("invalid specifier");
+         return ++it;
+       }
+
+       template <typename FormatContext>
+       auto format(Answer, FormatContext& ctx) {
+         return spec == 's' ?
+           format_to(ctx.begin(), "{}", "fourty-two") :
+           format_to(ctx.begin(), "{}", 42);
+       }
+
+       char spec = 0;
+     };
+     }
+
+     std::string s = format(fmt("{:x}"), Answer());
+
+  gives a compile-time error due to invalid format specifier (`godbolt
+  <https://godbolt.org/g/2jQ1Dv>`__)::
+
+     ...
+     <source>:12:45: error: expression '<throw-expression>' is not a constant expression
+            throw format_error("invalid specifier");
+
+* Added `iterator support
+  <https://fmt.dev/latest/api.html#output-iterator-support>`_:
+
+  .. code:: c++
+
+     #include <vector>
+     #include <fmt/format.h>
+
+     std::vector<char> out;
+     fmt::format_to(std::back_inserter(out), "{}", 42);
+
+* Added the `format_to_n
+  <https://fmt.dev/latest/api.html#_CPPv2N3fmt11format_to_nE8OutputItNSt6size_tE11string_viewDpRK4Args>`_
+  function that restricts the output to the specified number of characters
+  (`#298 <https://github.com/fmtlib/fmt/issues/298>`_):
+
+  .. code:: c++
+
+     char out[4];
+     fmt::format_to_n(out, sizeof(out), "{}", 12345);
+     // out == "1234" (without terminating '\0')
+
+* Added the `formatted_size
+  <https://fmt.dev/latest/api.html#_CPPv2N3fmt14formatted_sizeE11string_viewDpRK4Args>`_
+  function for computing the output size:
+
+  .. code:: c++
+
+     #include <fmt/format.h>
+
+     auto size = fmt::formatted_size("{}", 12345); // size == 5
+
+* Improved compile times by reducing dependencies on standard headers and
+  providing a lightweight `core API <https://fmt.dev/latest/api.html#core-api>`_:
+
+  .. code:: c++
+
+     #include <fmt/core.h>
+
+     fmt::print("The answer is {}.", 42);
+
+  See `Compile time and code bloat
+  <https://github.com/fmtlib/fmt#compile-time-and-code-bloat>`_.
+
+* Added the `make_format_args
+  <https://fmt.dev/latest/api.html#_CPPv2N3fmt16make_format_argsEDpRK4Args>`_
+  function for capturing formatting arguments:
+
+  .. code:: c++
+  
+     // Prints formatted error message.
+     void vreport_error(const char *format, fmt::format_args args) {
+       fmt::print("Error: ");
+       fmt::vprint(format, args);
+     }
+     template <typename... Args>
+     void report_error(const char *format, const Args & ... args) {
+       vreport_error(format, fmt::make_format_args(args...));
+     }
+
+* Added the ``make_printf_args`` function for capturing ``printf`` arguments
+  (`#687 <https://github.com/fmtlib/fmt/issues/687>`_,
+  `#694 <https://github.com/fmtlib/fmt/pull/694>`_).
+  Thanks `@Kronuz (Germán Méndez Bravo) <https://github.com/Kronuz>`_.
+
+* Added prefix ``v`` to non-variadic functions taking ``format_args`` to
+  distinguish them from variadic ones:
+
+  .. code:: c++
+
+     std::string vformat(string_view format_str, format_args args);
+     
+     template <typename... Args>
+     std::string format(string_view format_str, const Args & ... args);
+
+* Added experimental support for formatting ranges, containers and tuple-like
+  types in ``fmt/ranges.h`` (`#735 <https://github.com/fmtlib/fmt/pull/735>`_):
+
+  .. code:: c++
+
+     #include <fmt/ranges.h>
+
+     std::vector<int> v = {1, 2, 3};
+     fmt::print("{}", v); // prints {1, 2, 3}
+
+  Thanks `@Remotion (Remo) <https://github.com/Remotion>`_.
+
+* Implemented ``wchar_t`` date and time formatting
+  (`#712 <https://github.com/fmtlib/fmt/pull/712>`_):
+
+  .. code:: c++
+
+     #include <fmt/time.h>
+
+     std::time_t t = std::time(nullptr);
+     auto s = fmt::format(L"The date is {:%Y-%m-%d}.", *std::localtime(&t));
+
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
+
+* Provided more wide string overloads
+  (`#724 <https://github.com/fmtlib/fmt/pull/724>`_).
+  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
+
+* Switched from a custom null-terminated string view class to ``string_view``
+  in the format API and provided ``fmt::string_view`` which implements a subset
+  of ``std::string_view`` API for pre-C++17 systems.
+
+* Added support for ``std::experimental::string_view``
+  (`#607 <https://github.com/fmtlib/fmt/pull/607>`_):
+
+  .. code:: c++
+
+     #include <fmt/core.h>
+     #include <experimental/string_view>
+
+     fmt::print("{}", std::experimental::string_view("foo"));
+
+  Thanks `@virgiliofornazin (Virgilio Alexandre Fornazin)
+  <https://github.com/virgiliofornazin>`__.
+
+* Allowed mixing named and automatic arguments:
+
+  .. code:: c++
+
+     fmt::format("{} {two}", 1, fmt::arg("two", 2));
+
+* Removed the write API in favor of the `format API
+  <https://fmt.dev/latest/api.html#format-api>`_ with compile-time handling of
+  format strings.
+
+* Disallowed formatting of multibyte strings into a wide character target
+  (`#606 <https://github.com/fmtlib/fmt/pull/606>`_).
+
+* Improved documentation
+  (`#515 <https://github.com/fmtlib/fmt/pull/515>`_,
+  `#614 <https://github.com/fmtlib/fmt/issues/614>`_,
+  `#617 <https://github.com/fmtlib/fmt/pull/617>`_,
+  `#661 <https://github.com/fmtlib/fmt/pull/661>`_,
+  `#680 <https://github.com/fmtlib/fmt/pull/680>`_).
+  Thanks `@ibell (Ian Bell) <https://github.com/ibell>`_,
+  `@mihaitodor (Mihai Todor) <https://github.com/mihaitodor>`_, and
+  `@johnthagen <https://github.com/johnthagen>`_.
+
+* Implemented more efficient handling of large number of format arguments.
+
+* Introduced an inline namespace for symbol versioning.
+
+* Added debug postfix ``d`` to the ``fmt`` library name
+  (`#636 <https://github.com/fmtlib/fmt/issues/636>`_).
+
+* Removed unnecessary ``fmt/`` prefix in includes
+  (`#397 <https://github.com/fmtlib/fmt/pull/397>`_).
+  Thanks `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_.
+
+* Moved ``fmt/*.h`` to ``include/fmt/*.h`` to prevent irrelevant files and
+  directories appearing on the include search paths when fmt is used as a
+  subproject and moved source files to the ``src`` directory.
+
+* Added qmake project file ``support/fmt.pro``
+  (`#641 <https://github.com/fmtlib/fmt/pull/641>`_).
+  Thanks `@cowo78 (Giuseppe Corbelli) <https://github.com/cowo78>`_.
+
+* Added Gradle build file ``support/build.gradle``
+  (`#649 <https://github.com/fmtlib/fmt/pull/649>`_).
+  Thanks `@luncliff (Park DongHa) <https://github.com/luncliff>`_.
+
+* Removed ``FMT_CPPFORMAT`` CMake option.
+
+* Fixed a name conflict with the macro ``CHAR_WIDTH`` in glibc
+  (`#616 <https://github.com/fmtlib/fmt/pull/616>`_).
+  Thanks `@aroig (Abdó Roig-Maranges) <https://github.com/aroig>`_.
+
+* Fixed handling of nested braces in ``fmt::join``
+  (`#638 <https://github.com/fmtlib/fmt/issues/638>`_).
+
+* Added ``SOURCELINK_SUFFIX`` for compatibility with Sphinx 1.5
+  (`#497 <https://github.com/fmtlib/fmt/pull/497>`_).
+  Thanks `@ginggs (Graham Inggs) <https://github.com/ginggs>`_.
+
+* Added a missing ``inline`` in the header-only mode
+  (`#626 <https://github.com/fmtlib/fmt/pull/626>`_).
+  Thanks `@aroig (Abdó Roig-Maranges) <https://github.com/aroig>`_.
+
+* Fixed various compiler warnings
+  (`#640 <https://github.com/fmtlib/fmt/pull/640>`_,
+  `#656 <https://github.com/fmtlib/fmt/pull/656>`_,
+  `#679 <https://github.com/fmtlib/fmt/pull/679>`_,
+  `#681 <https://github.com/fmtlib/fmt/pull/681>`_,
+  `#705 <https://github.com/fmtlib/fmt/pull/705>`__,
+  `#715 <https://github.com/fmtlib/fmt/issues/715>`_,
+  `#717 <https://github.com/fmtlib/fmt/pull/717>`_,
+  `#720 <https://github.com/fmtlib/fmt/pull/720>`_,
+  `#723 <https://github.com/fmtlib/fmt/pull/723>`_,
+  `#726 <https://github.com/fmtlib/fmt/pull/726>`_,
+  `#730 <https://github.com/fmtlib/fmt/pull/730>`_,
+  `#739 <https://github.com/fmtlib/fmt/pull/739>`_).
+  Thanks `@peterbell10 <https://github.com/peterbell10>`_,
+  `@LarsGullik <https://github.com/LarsGullik>`_,
+  `@foonathan (Jonathan Müller) <https://github.com/foonathan>`_,
+  `@eliaskosunen (Elias Kosunen) <https://github.com/eliaskosunen>`_,
+  `@christianparpart (Christian Parpart) <https://github.com/christianparpart>`_,
+  `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
+  and `@mwinterb <https://github.com/mwinterb>`_.
+
+* Worked around an MSVC bug and fixed several warnings
+  (`#653 <https://github.com/fmtlib/fmt/pull/653>`_).
+  Thanks `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_.
+
+* Worked around GCC bug 67371
+  (`#682 <https://github.com/fmtlib/fmt/issues/682>`_).
+
+* Fixed compilation with ``-fno-exceptions``
+  (`#655 <https://github.com/fmtlib/fmt/pull/655>`_).
+  Thanks `@chenxiaolong (Andrew Gunnerson) <https://github.com/chenxiaolong>`_.
+
+* Made ``constexpr remove_prefix`` gcc version check tighter
+  (`#648 <https://github.com/fmtlib/fmt/issues/648>`_).
+
+* Renamed internal type enum constants to prevent collision with poorly written
+  C libraries (`#644 <https://github.com/fmtlib/fmt/issues/644>`_).
+
+* Added detection of ``wostream operator<<``
+  (`#650 <https://github.com/fmtlib/fmt/issues/650>`_).
+
+* Fixed compilation on OpenBSD
+  (`#660 <https://github.com/fmtlib/fmt/pull/660>`_).
+  Thanks `@hubslave <https://github.com/hubslave>`_.
+
+* Fixed compilation on FreeBSD 12
+  (`#732 <https://github.com/fmtlib/fmt/pull/732>`_).
+  Thanks `@dankm <https://github.com/dankm>`_.
+
+* Fixed compilation when there is a mismatch between ``-std`` options between
+  the library and user code
+  (`#664 <https://github.com/fmtlib/fmt/issues/664>`_).
+
+* Fixed compilation with GCC 7 and ``-std=c++11``
+  (`#734 <https://github.com/fmtlib/fmt/issues/734>`_).
+
+* Improved generated binary code on GCC 7 and older
+  (`#668 <https://github.com/fmtlib/fmt/issues/668>`_).
+
+* Fixed handling of numeric alignment with no width 
+  (`#675 <https://github.com/fmtlib/fmt/issues/675>`_).
+
+* Fixed handling of empty strings in UTF8/16 converters
+  (`#676 <https://github.com/fmtlib/fmt/pull/676>`_).
+  Thanks `@vgalka-sl (Vasili Galka) <https://github.com/vgalka-sl>`_.
+
+* Fixed formatting of an empty ``string_view``
+  (`#689 <https://github.com/fmtlib/fmt/issues/689>`_).
+
+* Fixed detection of ``string_view`` on libc++ 
+  (`#686 <https://github.com/fmtlib/fmt/issues/686>`_).
+
+* Fixed DLL issues (`#696 <https://github.com/fmtlib/fmt/pull/696>`_).
+  Thanks `@sebkoenig <https://github.com/sebkoenig>`_.
+
+* Fixed compile checks for mixing narrow and wide strings
+  (`#690 <https://github.com/fmtlib/fmt/issues/690>`_).
+
+* Disabled unsafe implicit conversion to ``std::string``
+  (`#729 <https://github.com/fmtlib/fmt/issues/729>`_).
+
+* Fixed handling of reused format specs (as in ``fmt::join``) for pointers
+  (`#725 <https://github.com/fmtlib/fmt/pull/725>`_).
+  Thanks `@mwinterb <https://github.com/mwinterb>`_.
+
+* Fixed installation of ``fmt/ranges.h``
+  (`#738 <https://github.com/fmtlib/fmt/pull/738>`_).
+  Thanks `@sv1990 <https://github.com/sv1990>`_.
+
+4.1.0 - 2017-12-20
+------------------
+
+* Added ``fmt::to_wstring()`` in addition to ``fmt::to_string()``
+  (`#559 <https://github.com/fmtlib/fmt/pull/559>`_).
+  Thanks `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_.
+
+* Added support for C++17 ``std::string_view``
+  (`#571 <https://github.com/fmtlib/fmt/pull/571>`_ and
+  `#578 <https://github.com/fmtlib/fmt/pull/578>`_).
+  Thanks `@thelostt (Mário Feroldi) <https://github.com/thelostt>`_ and
+  `@mwinterb <https://github.com/mwinterb>`_.
+
+* Enabled stream exceptions to catch errors
+  (`#581 <https://github.com/fmtlib/fmt/issues/581>`_).
+  Thanks `@crusader-mike <https://github.com/crusader-mike>`_.
+
+* Allowed formatting of class hierarchies with ``fmt::format_arg()``
+  (`#547 <https://github.com/fmtlib/fmt/pull/547>`_).
+  Thanks `@rollbear (Björn Fahller) <https://github.com/rollbear>`_.
+
+* Removed limitations on character types
+  (`#563 <https://github.com/fmtlib/fmt/pull/563>`_).
+  Thanks `@Yelnats321 (Elnar Dakeshov) <https://github.com/Yelnats321>`_.
+
+* Conditionally enabled use of ``std::allocator_traits``
+  (`#583 <https://github.com/fmtlib/fmt/pull/583>`_).
+  Thanks `@mwinterb <https://github.com/mwinterb>`_.
+
+* Added support for ``const`` variadic member function emulation with
+  ``FMT_VARIADIC_CONST`` (`#591 <https://github.com/fmtlib/fmt/pull/591>`_).
+  Thanks `@ludekvodicka (Ludek Vodicka) <https://github.com/ludekvodicka>`_.
+
+* Various bugfixes: bad overflow check, unsupported implicit type conversion
+  when determining formatting function, test segfaults
+  (`#551 <https://github.com/fmtlib/fmt/issues/551>`_), ill-formed macros
+  (`#542 <https://github.com/fmtlib/fmt/pull/542>`_) and ambiguous overloads
+  (`#580 <https://github.com/fmtlib/fmt/issues/580>`_).
+  Thanks `@xylosper (Byoung-young Lee) <https://github.com/xylosper>`_.
+
+* Prevented warnings on MSVC (`#605 <https://github.com/fmtlib/fmt/pull/605>`_,
+  `#602 <https://github.com/fmtlib/fmt/pull/602>`_, and
+  `#545 <https://github.com/fmtlib/fmt/pull/545>`_),
+  clang (`#582 <https://github.com/fmtlib/fmt/pull/582>`_),
+  GCC (`#573 <https://github.com/fmtlib/fmt/issues/573>`_),
+  various conversion warnings (`#609 <https://github.com/fmtlib/fmt/pull/609>`_,
+  `#567 <https://github.com/fmtlib/fmt/pull/567>`_,
+  `#553 <https://github.com/fmtlib/fmt/pull/553>`_ and
+  `#553 <https://github.com/fmtlib/fmt/pull/553>`_), and added ``override`` and
+  ``[[noreturn]]`` (`#549 <https://github.com/fmtlib/fmt/pull/549>`_ and
+  `#555 <https://github.com/fmtlib/fmt/issues/555>`_).
+  Thanks `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_,
+  `@virgiliofornazin (Virgilio Alexandre Fornazin)
+  <https://gihtub.com/virgiliofornazin>`_,
+  `@alexanderbock (Alexander Bock) <https://github.com/alexanderbock>`_,
+  `@yumetodo <https://github.com/yumetodo>`_,
+  `@VaderY (Császár Mátyás) <https://github.com/VaderY>`_,
+  `@jpcima (JP Cimalando) <https://github.com/jpcima>`_,
+  `@thelostt (Mário Feroldi) <https://github.com/thelostt>`_, and
+  `@Manu343726 (Manu Sánchez) <https://github.com/Manu343726>`_.
+
+* Improved CMake: Used ``GNUInstallDirs`` to set installation location
+  (`#610 <https://github.com/fmtlib/fmt/pull/610>`_) and fixed warnings
+  (`#536 <https://github.com/fmtlib/fmt/pull/536>`_ and
+  `#556 <https://github.com/fmtlib/fmt/pull/556>`_).
+  Thanks `@mikecrowe (Mike Crowe) <https://github.com/mikecrowe>`_,
+  `@evgen231 <https://github.com/evgen231>`_ and
+  `@henryiii (Henry Schreiner) <https://github.com/henryiii>`_.
+
+4.0.0 - 2017-06-27
+------------------
+
+* Removed old compatibility headers ``cppformat/*.h`` and CMake options
+  (`#527 <https://github.com/fmtlib/fmt/pull/527>`_).
+  Thanks `@maddinat0r (Alex Martin) <https://github.com/maddinat0r>`_.
+
+* Added ``string.h`` containing ``fmt::to_string()`` as alternative to
+  ``std::to_string()`` as well as other string writer functionality
+  (`#326 <https://github.com/fmtlib/fmt/issues/326>`_ and
+  `#441 <https://github.com/fmtlib/fmt/pull/441>`_):
+
+  .. code:: c++
+
+    #include "fmt/string.h"
+  
+    std::string answer = fmt::to_string(42);
+
+  Thanks to `@glebov-andrey (Andrey Glebov)
+  <https://github.com/glebov-andrey>`_.
+
+* Moved ``fmt::printf()`` to new ``printf.h`` header and allowed ``%s`` as
+  generic specifier (`#453 <https://github.com/fmtlib/fmt/pull/453>`_),
+  made ``%.f`` more conformant to regular ``printf()``
+  (`#490 <https://github.com/fmtlib/fmt/pull/490>`_), added custom writer
+  support (`#476 <https://github.com/fmtlib/fmt/issues/476>`_) and implemented
+  missing custom argument formatting
+  (`#339 <https://github.com/fmtlib/fmt/pull/339>`_ and
+  `#340 <https://github.com/fmtlib/fmt/pull/340>`_):
+
+  .. code:: c++
+
+    #include "fmt/printf.h"
+ 
+    // %s format specifier can be used with any argument type.
+    fmt::printf("%s", 42);
+
+  Thanks `@mojoBrendan <https://github.com/mojoBrendan>`_,
+  `@manylegged (Arthur Danskin) <https://github.com/manylegged>`_ and
+  `@spacemoose (Glen Stark) <https://github.com/spacemoose>`_.
+  See also `#360 <https://github.com/fmtlib/fmt/issues/360>`_,
+  `#335 <https://github.com/fmtlib/fmt/issues/335>`_ and
+  `#331 <https://github.com/fmtlib/fmt/issues/331>`_.
+
+* Added ``container.h`` containing a ``BasicContainerWriter``
+  to write to containers like ``std::vector``
+  (`#450 <https://github.com/fmtlib/fmt/pull/450>`_).
+  Thanks `@polyvertex (Jean-Charles Lefebvre) <https://github.com/polyvertex>`_.
+
+* Added ``fmt::join()`` function that takes a range and formats
+  its elements separated by a given string
+  (`#466 <https://github.com/fmtlib/fmt/pull/466>`_):
+
+  .. code:: c++
+
+    #include "fmt/format.h"
+ 
+    std::vector<double> v = {1.2, 3.4, 5.6};
+    // Prints "(+01.20, +03.40, +05.60)".
+    fmt::print("({:+06.2f})", fmt::join(v.begin(), v.end(), ", "));
+
+  Thanks `@olivier80 <https://github.com/olivier80>`_.
+
+* Added support for custom formatting specifications to simplify customization
+  of built-in formatting (`#444 <https://github.com/fmtlib/fmt/pull/444>`_).
+  Thanks `@polyvertex (Jean-Charles Lefebvre) <https://github.com/polyvertex>`_.
+  See also `#439 <https://github.com/fmtlib/fmt/issues/439>`_.
+
+* Added ``fmt::format_system_error()`` for error code formatting
+  (`#323 <https://github.com/fmtlib/fmt/issues/323>`_ and
+  `#526 <https://github.com/fmtlib/fmt/pull/526>`_).
+  Thanks `@maddinat0r (Alex Martin) <https://github.com/maddinat0r>`_.
+
+* Added thread-safe ``fmt::localtime()`` and ``fmt::gmtime()``
+  as replacement   for the standard version to ``time.h``
+  (`#396 <https://github.com/fmtlib/fmt/pull/396>`_).
+  Thanks `@codicodi <https://github.com/codicodi>`_.
+
+* Internal improvements to ``NamedArg`` and ``ArgLists``
+  (`#389 <https://github.com/fmtlib/fmt/pull/389>`_ and
+  `#390 <https://github.com/fmtlib/fmt/pull/390>`_).
+  Thanks `@chronoxor <https://github.com/chronoxor>`_.
+
+* Fixed crash due to bug in ``FormatBuf``
+  (`#493 <https://github.com/fmtlib/fmt/pull/493>`_).
+  Thanks `@effzeh <https://github.com/effzeh>`_. See also
+  `#480 <https://github.com/fmtlib/fmt/issues/480>`_ and
+  `#491 <https://github.com/fmtlib/fmt/issues/491>`_.
+
+* Fixed handling of wide strings in ``fmt::StringWriter``.
+
+* Improved compiler error messages
+  (`#357 <https://github.com/fmtlib/fmt/issues/357>`_).
+
+* Fixed various warnings and issues with various compilers
+  (`#494 <https://github.com/fmtlib/fmt/pull/494>`_,
+  `#499 <https://github.com/fmtlib/fmt/pull/499>`_,
+  `#483 <https://github.com/fmtlib/fmt/pull/483>`_,
+  `#485 <https://github.com/fmtlib/fmt/pull/485>`_,
+  `#482 <https://github.com/fmtlib/fmt/pull/482>`_,
+  `#475 <https://github.com/fmtlib/fmt/pull/475>`_,
+  `#473 <https://github.com/fmtlib/fmt/pull/473>`_ and
+  `#414 <https://github.com/fmtlib/fmt/pull/414>`_).
+  Thanks `@chronoxor <https://github.com/chronoxor>`_,
+  `@zhaohuaxishi <https://github.com/zhaohuaxishi>`_,
+  `@pkestene (Pierre Kestener) <https://github.com/pkestene>`_,
+  `@dschmidt (Dominik Schmidt) <https://github.com/dschmidt>`_ and
+  `@0x414c (Alexey Gorishny) <https://github.com/0x414c>`_ .
+
+* Improved CMake: targets are now namespaced
+  (`#511 <https://github.com/fmtlib/fmt/pull/511>`_ and
+  `#513 <https://github.com/fmtlib/fmt/pull/513>`_), supported header-only
+  ``printf.h`` (`#354 <https://github.com/fmtlib/fmt/pull/354>`_), fixed issue
+  with minimal supported library subset
+  (`#418 <https://github.com/fmtlib/fmt/issues/418>`_,
+  `#419 <https://github.com/fmtlib/fmt/pull/419>`_ and
+  `#420 <https://github.com/fmtlib/fmt/pull/420>`_).
+  Thanks `@bjoernthiel (Bjoern Thiel) <https://github.com/bjoernthiel>`_,
+  `@niosHD (Mario Werner) <https://github.com/niosHD>`_,
+  `@LogicalKnight (Sean LK) <https://github.com/LogicalKnight>`_ and
+  `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_.
+
+* Improved documentation. Thanks to
+  `@pwm1234 (Phil) <https://github.com/pwm1234>`_ for
+  `#393 <https://github.com/fmtlib/fmt/pull/393>`_.
+
+3.0.2 - 2017-06-14
+------------------
+
+* Added ``FMT_VERSION`` macro
+  (`#411 <https://github.com/fmtlib/fmt/issues/411>`_).
+
+* Used ``FMT_NULL`` instead of literal ``0``
+  (`#409 <https://github.com/fmtlib/fmt/pull/409>`_).
+  Thanks `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_.
+
+* Added extern templates for ``format_float``
+  (`#413 <https://github.com/fmtlib/fmt/issues/413>`_).
+
+* Fixed implicit conversion issue
+  (`#507 <https://github.com/fmtlib/fmt/issues/507>`_).
+
+* Fixed signbit detection (`#423 <https://github.com/fmtlib/fmt/issues/423>`_).
+
+* Fixed naming collision (`#425 <https://github.com/fmtlib/fmt/issues/425>`_).
+
+* Fixed missing intrinsic for C++/CLI
+  (`#457 <https://github.com/fmtlib/fmt/pull/457>`_).
+  Thanks `@calumr (Calum Robinson) <https://github.com/calumr>`_
+
+* Fixed Android detection (`#458 <https://github.com/fmtlib/fmt/pull/458>`_).
+  Thanks `@Gachapen (Magnus Bjerke Vik) <https://github.com/Gachapen>`_.
+
+* Use lean ``windows.h`` if not in header-only mode
+  (`#503 <https://github.com/fmtlib/fmt/pull/503>`_).
+  Thanks `@Quentin01 (Quentin Buathier) <https://github.com/Quentin01>`_.
+
+* Fixed issue with CMake exporting C++11 flag
+  (`#445 <https://github.com/fmtlib/fmt/pull/455>`_).
+  Thanks `@EricWF (Eric) <https://github.com/EricWF>`_.
+
+* Fixed issue with nvcc and MSVC compiler bug and MinGW
+  (`#505 <https://github.com/fmtlib/fmt/issues/505>`_).
+
+* Fixed DLL issues (`#469 <https://github.com/fmtlib/fmt/pull/469>`_ and
+  `#502 <https://github.com/fmtlib/fmt/pull/502>`_).
+  Thanks `@richardeakin (Richard Eakin) <https://github.com/richardeakin>`_ and
+  `@AndreasSchoenle (Andreas Schönle) <https://github.com/AndreasSchoenle>`_.
+
+* Fixed test compilation under FreeBSD
+  (`#433 <https://github.com/fmtlib/fmt/issues/433>`_).
+
+* Fixed various warnings (`#403 <https://github.com/fmtlib/fmt/pull/403>`_,
+  `#410 <https://github.com/fmtlib/fmt/pull/410>`_ and
+  `#510 <https://github.com/fmtlib/fmt/pull/510>`_).
+  Thanks `@Lecetem <https://github.com/Lectem>`_,
+  `@chenhayat (Chen Hayat) <https://github.com/chenhayat>`_ and
+  `@trozen <https://github.com/trozen>`_.
+
+* Worked around a broken ``__builtin_clz`` in clang with MS codegen
+  (`#519 <https://github.com/fmtlib/fmt/issues/519>`_).
+
+* Removed redundant include
+  (`#479 <https://github.com/fmtlib/fmt/issues/479>`_).
+
+* Fixed documentation issues.
+
+3.0.1 - 2016-11-01
+------------------
+* Fixed handling of thousands separator
+  (`#353 <https://github.com/fmtlib/fmt/issues/353>`_).
+
+* Fixed handling of ``unsigned char`` strings
+  (`#373 <https://github.com/fmtlib/fmt/issues/373>`_).
+
+* Corrected buffer growth when formatting time
+  (`#367 <https://github.com/fmtlib/fmt/issues/367>`_).
+
+* Removed warnings under MSVC and clang
+  (`#318 <https://github.com/fmtlib/fmt/issues/318>`_,
+  `#250 <https://github.com/fmtlib/fmt/issues/250>`_, also merged
+  `#385 <https://github.com/fmtlib/fmt/pull/385>`_ and
+  `#361 <https://github.com/fmtlib/fmt/pull/361>`_).
+  Thanks `@jcelerier (Jean-Michaël Celerier) <https://github.com/jcelerier>`_
+  and `@nmoehrle (Nils Moehrle) <https://github.com/nmoehrle>`_.
+
+* Fixed compilation issues under Android
+  (`#327 <https://github.com/fmtlib/fmt/pull/327>`_,
+  `#345 <https://github.com/fmtlib/fmt/issues/345>`_ and
+  `#381 <https://github.com/fmtlib/fmt/pull/381>`_),
+  FreeBSD (`#358 <https://github.com/fmtlib/fmt/pull/358>`_),
+  Cygwin (`#388 <https://github.com/fmtlib/fmt/issues/388>`_),
+  MinGW (`#355 <https://github.com/fmtlib/fmt/issues/355>`_) as well as other
+  issues (`#350 <https://github.com/fmtlib/fmt/issues/350>`_,
+  `#366 <https://github.com/fmtlib/fmt/issues/355>`_,
+  `#348 <https://github.com/fmtlib/fmt/pull/348>`_,
+  `#402 <https://github.com/fmtlib/fmt/pull/402>`_,
+  `#405 <https://github.com/fmtlib/fmt/pull/405>`_).
+  Thanks to `@dpantele (Dmitry) <https://github.com/dpantele>`_,
+  `@hghwng (Hugh Wang) <https://github.com/hghwng>`_,
+  `@arvedarved (Tilman Keskinöz) <https://github.com/arvedarved>`_,
+  `@LogicalKnight (Sean) <https://github.com/LogicalKnight>`_ and
+  `@JanHellwig (Jan Hellwig) <https://github.com/janhellwig>`_.
+
+* Fixed some documentation issues and extended specification
+  (`#320 <https://github.com/fmtlib/fmt/issues/320>`_,
+  `#333 <https://github.com/fmtlib/fmt/pull/333>`_,
+  `#347 <https://github.com/fmtlib/fmt/issues/347>`_,
+  `#362 <https://github.com/fmtlib/fmt/pull/362>`_).
+  Thanks to `@smellman (Taro Matsuzawa aka. btm)
+  <https://github.com/smellman>`_.
+
+3.0.0 - 2016-05-07
+------------------
+
+* The project has been renamed from C++ Format (cppformat) to fmt for
+  consistency with the used namespace and macro prefix
+  (`#307 <https://github.com/fmtlib/fmt/issues/307>`_).
+  Library headers are now located in the ``fmt`` directory:
+
+  .. code:: c++
+
+    #include "fmt/format.h"
+
+  Including ``format.h`` from the ``cppformat`` directory is deprecated
+  but works via a proxy header which will be removed in the next major version.
+  
+  The documentation is now available at https://fmt.dev.
+
+* Added support for `strftime <http://en.cppreference.com/w/cpp/chrono/c/strftime>`_-like
+  `date and time formatting <https://fmt.dev/3.0.0/api.html#date-and-time-formatting>`_
+  (`#283 <https://github.com/fmtlib/fmt/issues/283>`_):
+
+  .. code:: c++
+
+    #include "fmt/time.h"
+
+    std::time_t t = std::time(nullptr);
+    // Prints "The date is 2016-04-29." (with the current date)
+    fmt::print("The date is {:%Y-%m-%d}.", *std::localtime(&t));
+
+* ``std::ostream`` support including formatting of user-defined types that provide
+  overloaded ``operator<<`` has been moved to ``fmt/ostream.h``:
+
+  .. code:: c++
+
+    #include "fmt/ostream.h"
+
+    class Date {
+      int year_, month_, day_;
+    public:
+      Date(int year, int month, int day) : year_(year), month_(month), day_(day) {}
+
+      friend std::ostream &operator<<(std::ostream &os, const Date &d) {
+        return os << d.year_ << '-' << d.month_ << '-' << d.day_;
+      }
+    };
+
+    std::string s = fmt::format("The date is {}", Date(2012, 12, 9));
+    // s == "The date is 2012-12-9"
+
+* Added support for `custom argument formatters
+  <https://fmt.dev/3.0.0/api.html#argument-formatters>`_
+  (`#235 <https://github.com/fmtlib/fmt/issues/235>`_).
+
+* Added support for locale-specific integer formatting with the ``n`` specifier
+  (`#305 <https://github.com/fmtlib/fmt/issues/305>`_):
+
+  .. code:: c++
+
+    std::setlocale(LC_ALL, "en_US.utf8");
+    fmt::print("cppformat: {:n}\n", 1234567); // prints 1,234,567
+
+* Sign is now preserved when formatting an integer with an incorrect ``printf``
+  format specifier (`#265 <https://github.com/fmtlib/fmt/issues/265>`_):
+
+  .. code:: c++
+
+    fmt::printf("%lld", -42); // prints -42
+
+  Note that it would be an undefined behavior in ``std::printf``.
+
+* Length modifiers such as ``ll`` are now optional in printf formatting
+  functions and the correct type is determined automatically
+  (`#255 <https://github.com/fmtlib/fmt/issues/255>`_):
+
+  .. code:: c++
+
+    fmt::printf("%d", std::numeric_limits<long long>::max());
+
+  Note that it would be an undefined behavior in ``std::printf``.
+
+* Added initial support for custom formatters
+  (`#231 <https://github.com/fmtlib/fmt/issues/231>`_).
+
+* Fixed detection of user-defined literal support on Intel C++ compiler
+  (`#311 <https://github.com/fmtlib/fmt/issues/311>`_,
+  `#312 <https://github.com/fmtlib/fmt/pull/312>`_).
+  Thanks to `@dean0x7d (Dean Moldovan) <https://github.com/dean0x7d>`_ and
+  `@speth (Ray Speth) <https://github.com/speth>`_.
+
+* Reduced compile time
+  (`#243 <https://github.com/fmtlib/fmt/pull/243>`_,
+  `#249 <https://github.com/fmtlib/fmt/pull/249>`_,
+  `#317 <https://github.com/fmtlib/fmt/issues/317>`_):
+
+  .. image:: https://cloud.githubusercontent.com/assets/4831417/11614060/
+             b9e826d2-9c36-11e5-8666-d4131bf503ef.png
+
+  .. image:: https://cloud.githubusercontent.com/assets/4831417/11614080/
+             6ac903cc-9c37-11e5-8165-26df6efae364.png
+
+  Thanks to `@dean0x7d (Dean Moldovan) <https://github.com/dean0x7d>`_.
+
+* Compile test fixes (`#313 <https://github.com/fmtlib/fmt/pull/313>`_).
+  Thanks to `@dean0x7d (Dean Moldovan) <https://github.com/dean0x7d>`_.
+
+* Documentation fixes (`#239 <https://github.com/fmtlib/fmt/pull/239>`_,
+  `#248 <https://github.com/fmtlib/fmt/issues/248>`_,
+  `#252 <https://github.com/fmtlib/fmt/issues/252>`_,
+  `#258 <https://github.com/fmtlib/fmt/pull/258>`_,
+  `#260 <https://github.com/fmtlib/fmt/issues/260>`_,
+  `#301 <https://github.com/fmtlib/fmt/issues/301>`_,
+  `#309 <https://github.com/fmtlib/fmt/pull/309>`_).
+  Thanks to `@ReadmeCritic <https://github.com/ReadmeCritic>`_
+  `@Gachapen (Magnus Bjerke Vik) <https://github.com/Gachapen>`_ and
+  `@jwilk (Jakub Wilk) <https://github.com/jwilk>`_.
+
+* Fixed compiler and sanitizer warnings
+  (`#244 <https://github.com/fmtlib/fmt/issues/244>`_,
+  `#256 <https://github.com/fmtlib/fmt/pull/256>`_,
+  `#259 <https://github.com/fmtlib/fmt/pull/259>`_,
+  `#263 <https://github.com/fmtlib/fmt/issues/263>`_,
+  `#274 <https://github.com/fmtlib/fmt/issues/274>`_,
+  `#277 <https://github.com/fmtlib/fmt/pull/277>`_,
+  `#286 <https://github.com/fmtlib/fmt/pull/286>`_,
+  `#291 <https://github.com/fmtlib/fmt/issues/291>`_,
+  `#296 <https://github.com/fmtlib/fmt/issues/296>`_,
+  `#308 <https://github.com/fmtlib/fmt/issues/308>`_)
+  Thanks to `@mwinterb <https://github.com/mwinterb>`_,
+  `@pweiskircher (Patrik Weiskircher) <https://github.com/pweiskircher>`_,
+  `@Naios <https://github.com/Naios>`_.
+
+* Improved compatibility with Windows Store apps
+  (`#280 <https://github.com/fmtlib/fmt/issues/280>`_,
+  `#285 <https://github.com/fmtlib/fmt/pull/285>`_)
+  Thanks to `@mwinterb <https://github.com/mwinterb>`_.
+
+* Added tests of compatibility with older C++ standards
+  (`#273 <https://github.com/fmtlib/fmt/pull/273>`_).
+  Thanks to `@niosHD <https://github.com/niosHD>`_.
+
+* Fixed Android build (`#271 <https://github.com/fmtlib/fmt/pull/271>`_).
+  Thanks to `@newnon <https://github.com/newnon>`_.
+
+* Changed ``ArgMap`` to be backed by a vector instead of a map.
+  (`#261 <https://github.com/fmtlib/fmt/issues/261>`_,
+  `#262 <https://github.com/fmtlib/fmt/pull/262>`_).
+  Thanks to `@mwinterb <https://github.com/mwinterb>`_.
+
+* Added ``fprintf`` overload that writes to a ``std::ostream``
+  (`#251 <https://github.com/fmtlib/fmt/pull/251>`_).
+  Thanks to `nickhutchinson (Nicholas Hutchinson) <https://github.com/nickhutchinson>`_.
+
+* Export symbols when building a Windows DLL
+  (`#245 <https://github.com/fmtlib/fmt/pull/245>`_).
+  Thanks to `macdems (Maciek Dems) <https://github.com/macdems>`_.
+
+* Fixed compilation on Cygwin (`#304 <https://github.com/fmtlib/fmt/issues/304>`_).
+
+* Implemented a workaround for a bug in Apple LLVM version 4.2 of clang
+  (`#276 <https://github.com/fmtlib/fmt/issues/276>`_).
+
+* Implemented a workaround for Google Test bug
+  `#705 <https://github.com/google/googletest/issues/705>`_ on gcc 6
+  (`#268 <https://github.com/fmtlib/fmt/issues/268>`_).
+  Thanks to `octoploid <https://github.com/octoploid>`_.
+
+* Removed Biicode support because the latter has been discontinued.
+
+2.1.1 - 2016-04-11
+------------------
+
+* The install location for generated CMake files is now configurable via
+  the ``FMT_CMAKE_DIR`` CMake variable
+  (`#299 <https://github.com/fmtlib/fmt/pull/299>`_).
+  Thanks to `@niosHD <https://github.com/niosHD>`_.
+
+* Documentation fixes (`#252 <https://github.com/fmtlib/fmt/issues/252>`_).
+
+2.1.0 - 2016-03-21
+------------------
+
+* Project layout and build system improvements
+  (`#267 <https://github.com/fmtlib/fmt/pull/267>`_):
+
+  * The code have been moved to the ``cppformat`` directory.
+    Including ``format.h`` from the top-level directory is deprecated
+    but works via a proxy header which will be removed in the next
+    major version.
+
+  * C++ Format CMake targets now have proper interface definitions.
+
+  * Installed version of the library now supports the header-only
+    configuration.
+
+  * Targets ``doc``, ``install``, and ``test`` are now disabled if C++ Format
+    is included as a CMake subproject. They can be enabled by setting
+    ``FMT_DOC``, ``FMT_INSTALL``, and ``FMT_TEST`` in the parent project.
+
+  Thanks to `@niosHD <https://github.com/niosHD>`_.
+
+2.0.1 - 2016-03-13
+------------------
+
+* Improved CMake find and package support
+  (`#264 <https://github.com/fmtlib/fmt/issues/264>`_).
+  Thanks to `@niosHD <https://github.com/niosHD>`_.
+
+* Fix compile error with Android NDK and mingw32
+  (`#241 <https://github.com/fmtlib/fmt/issues/241>`_).
+  Thanks to `@Gachapen (Magnus Bjerke Vik) <https://github.com/Gachapen>`_.
+
+* Documentation fixes
+  (`#248 <https://github.com/fmtlib/fmt/issues/248>`_,
+  `#260 <https://github.com/fmtlib/fmt/issues/260>`_).
+
+2.0.0 - 2015-12-01
+------------------
+
+General
+~~~~~~~
+
+* [Breaking] Named arguments
+  (`#169 <https://github.com/fmtlib/fmt/pull/169>`_,
+  `#173 <https://github.com/fmtlib/fmt/pull/173>`_,
+  `#174 <https://github.com/fmtlib/fmt/pull/174>`_):
+
+  .. code:: c++
+
+    fmt::print("The answer is {answer}.", fmt::arg("answer", 42));
+
+  Thanks to `@jamboree <https://github.com/jamboree>`_.
+
+* [Experimental] User-defined literals for format and named arguments
+  (`#204 <https://github.com/fmtlib/fmt/pull/204>`_,
+  `#206 <https://github.com/fmtlib/fmt/pull/206>`_,
+  `#207 <https://github.com/fmtlib/fmt/pull/207>`_):
+
+  .. code:: c++
+
+    using namespace fmt::literals;
+    fmt::print("The answer is {answer}.", "answer"_a=42);
+
+  Thanks to `@dean0x7d (Dean Moldovan) <https://github.com/dean0x7d>`_.
+
+* [Breaking] Formatting of more than 16 arguments is now supported when using
+  variadic templates
+  (`#141 <https://github.com/fmtlib/fmt/issues/141>`_).
+  Thanks to `@Shauren <https://github.com/Shauren>`_.
+
+* Runtime width specification
+  (`#168 <https://github.com/fmtlib/fmt/pull/168>`_):
+
+  .. code:: c++
+
+    fmt::format("{0:{1}}", 42, 5); // gives "   42"
+
+  Thanks to `@jamboree <https://github.com/jamboree>`_.
+
+* [Breaking] Enums are now formatted with an overloaded ``std::ostream`` insertion
+  operator (``operator<<``) if available
+  (`#232 <https://github.com/fmtlib/fmt/issues/232>`_).
+
+* [Breaking] Changed default ``bool`` format to textual, "true" or "false"
+  (`#170 <https://github.com/fmtlib/fmt/issues/170>`_):
+
+  .. code:: c++
+  
+    fmt::print("{}", true); // prints "true"
+
+  To print ``bool`` as a number use numeric format specifier such as ``d``:
+
+  .. code:: c++
+
+    fmt::print("{:d}", true); // prints "1"
+
+* ``fmt::printf`` and ``fmt::sprintf`` now support formatting of ``bool`` with the
+  ``%s`` specifier giving textual output, "true" or "false"
+  (`#223 <https://github.com/fmtlib/fmt/pull/223>`_):
+
+  .. code:: c++
+
+    fmt::printf("%s", true); // prints "true"
+
+  Thanks to `@LarsGullik <https://github.com/LarsGullik>`_.
+
+* [Breaking] ``signed char`` and ``unsigned char`` are now formatted as integers by default
+  (`#217 <https://github.com/fmtlib/fmt/pull/217>`_).
+
+* [Breaking] Pointers to C strings can now be formatted with the ``p`` specifier
+  (`#223 <https://github.com/fmtlib/fmt/pull/223>`_):
+
+  .. code:: c++
+
+    fmt::print("{:p}", "test"); // prints pointer value
+
+  Thanks to `@LarsGullik <https://github.com/LarsGullik>`_.
+
+* [Breaking] ``fmt::printf`` and ``fmt::sprintf`` now print null pointers as ``(nil)``
+  and null strings as ``(null)`` for consistency with glibc
+  (`#226 <https://github.com/fmtlib/fmt/pull/226>`_).
+  Thanks to `@LarsGullik <https://github.com/LarsGullik>`_.
+
+* [Breaking] ``fmt::(s)printf`` now supports formatting of objects of user-defined types
+  that provide an overloaded ``std::ostream`` insertion operator (``operator<<``)
+  (`#201 <https://github.com/fmtlib/fmt/issues/201>`_):
+
+  .. code:: c++
+
+    fmt::printf("The date is %s", Date(2012, 12, 9));
+
+* [Breaking] The ``Buffer`` template is now part of the public API and can be used
+  to implement custom memory buffers
+  (`#140 <https://github.com/fmtlib/fmt/issues/140>`_).
+  Thanks to `@polyvertex (Jean-Charles Lefebvre) <https://github.com/polyvertex>`_.
+
+* [Breaking] Improved compatibility between ``BasicStringRef`` and
+  `std::experimental::basic_string_view
+  <http://en.cppreference.com/w/cpp/experimental/basic_string_view>`_
+  (`#100 <https://github.com/fmtlib/fmt/issues/100>`_,
+  `#159 <https://github.com/fmtlib/fmt/issues/159>`_,
+  `#183 <https://github.com/fmtlib/fmt/issues/183>`_):
+
+  - Comparison operators now compare string content, not pointers
+  - ``BasicStringRef::c_str`` replaced by ``BasicStringRef::data``
+  - ``BasicStringRef`` is no longer assumed to be null-terminated
+
+  References to null-terminated strings are now represented by a new class,
+  ``BasicCStringRef``.
+
+* Dependency on pthreads introduced by Google Test is now optional
+  (`#185 <https://github.com/fmtlib/fmt/issues/185>`_).
+
+* New CMake options ``FMT_DOC``, ``FMT_INSTALL`` and ``FMT_TEST`` to control
+  generation of ``doc``, ``install`` and ``test`` targets respectively, on by default
+  (`#197 <https://github.com/fmtlib/fmt/issues/197>`_,
+  `#198 <https://github.com/fmtlib/fmt/issues/198>`_,
+  `#200 <https://github.com/fmtlib/fmt/issues/200>`_).
+  Thanks to `@maddinat0r (Alex Martin) <https://github.com/maddinat0r>`_.
+
+* ``noexcept`` is now used when compiling with MSVC2015
+  (`#215 <https://github.com/fmtlib/fmt/pull/215>`_).
+  Thanks to `@dmkrepo (Dmitriy) <https://github.com/dmkrepo>`_.
+
+* Added an option to disable use of ``windows.h`` when ``FMT_USE_WINDOWS_H``
+  is defined as 0 before including ``format.h``
+  (`#171 <https://github.com/fmtlib/fmt/issues/171>`_).
+  Thanks to `@alfps (Alf P. Steinbach) <https://github.com/alfps>`_.
+
+* [Breaking] ``windows.h`` is now included with ``NOMINMAX`` unless
+  ``FMT_WIN_MINMAX`` is defined. This is done to prevent breaking code using
+  ``std::min`` and ``std::max`` and only affects the header-only configuration
+  (`#152 <https://github.com/fmtlib/fmt/issues/152>`_,
+  `#153 <https://github.com/fmtlib/fmt/pull/153>`_,
+  `#154 <https://github.com/fmtlib/fmt/pull/154>`_).
+  Thanks to `@DevO2012 <https://github.com/DevO2012>`_.
+
+* Improved support for custom character types
+  (`#171 <https://github.com/fmtlib/fmt/issues/171>`_).
+  Thanks to `@alfps (Alf P. Steinbach) <https://github.com/alfps>`_.
+
+* Added an option to disable use of IOStreams when ``FMT_USE_IOSTREAMS``
+  is defined as 0 before including ``format.h``
+  (`#205 <https://github.com/fmtlib/fmt/issues/205>`_,
+  `#208 <https://github.com/fmtlib/fmt/pull/208>`_).
+  Thanks to `@JodiTheTigger <https://github.com/JodiTheTigger>`_.
+
+* Improved detection of ``isnan``, ``isinf`` and ``signbit``.
+
+Optimization
+~~~~~~~~~~~~
+
+* Made formatting of user-defined types more efficient with a custom stream buffer
+  (`#92 <https://github.com/fmtlib/fmt/issues/92>`_,
+  `#230 <https://github.com/fmtlib/fmt/pull/230>`_).
+  Thanks to `@NotImplemented <https://github.com/NotImplemented>`_.
+
+* Further improved performance of ``fmt::Writer`` on integer formatting
+  and fixed a minor regression. Now it is ~7% faster than ``karma::generate``
+  on Karma's benchmark
+  (`#186 <https://github.com/fmtlib/fmt/issues/186>`_).
+
+* [Breaking] Reduced `compiled code size
+  <https://github.com/fmtlib/fmt#compile-time-and-code-bloat>`_
+  (`#143 <https://github.com/fmtlib/fmt/issues/143>`_,
+  `#149 <https://github.com/fmtlib/fmt/pull/149>`_).
+
+Distribution
+~~~~~~~~~~~~
+
+* [Breaking] Headers are now installed in
+  ``${CMAKE_INSTALL_PREFIX}/include/cppformat``
+  (`#178 <https://github.com/fmtlib/fmt/issues/178>`_).
+  Thanks to `@jackyf (Eugene V. Lyubimkin) <https://github.com/jackyf>`_.
+
+* [Breaking] Changed the library name from ``format`` to ``cppformat``
+  for consistency with the project name and to avoid potential conflicts
+  (`#178 <https://github.com/fmtlib/fmt/issues/178>`_).
+  Thanks to `@jackyf (Eugene V. Lyubimkin) <https://github.com/jackyf>`_.
+
+* C++ Format is now available in `Debian <https://www.debian.org/>`_ GNU/Linux
+  (`stretch <https://packages.debian.org/source/stretch/cppformat>`_,
+  `sid <https://packages.debian.org/source/sid/cppformat>`_) and 
+  derived distributions such as
+  `Ubuntu <https://launchpad.net/ubuntu/+source/cppformat>`_ 15.10 and later
+  (`#155 <https://github.com/fmtlib/fmt/issues/155>`_)::
+
+    $ sudo apt-get install libcppformat1-dev
+
+  Thanks to `@jackyf (Eugene V. Lyubimkin) <https://github.com/jackyf>`_.
+
+* `Packages for Fedora and RHEL <https://admin.fedoraproject.org/pkgdb/package/cppformat/>`_
+  are now available. Thanks to Dave Johansen.
+  
+* C++ Format can now be installed via `Homebrew <http://brew.sh/>`_ on OS X
+  (`#157 <https://github.com/fmtlib/fmt/issues/157>`_)::
+
+    $ brew install cppformat
+
+  Thanks to `@ortho <https://github.com/ortho>`_, Anatoliy Bulukin.
+
+Documentation
+~~~~~~~~~~~~~
+
+* Migrated from ReadTheDocs to GitHub Pages for better responsiveness
+  and reliability
+  (`#128 <https://github.com/fmtlib/fmt/issues/128>`_).
+  New documentation address is http://cppformat.github.io/.
+
+
+* Added `Building the documentation
+  <https://fmt.dev/2.0.0/usage.html#building-the-documentation>`_
+  section to the documentation.
+
+* Documentation build script is now compatible with Python 3 and newer pip versions.
+  (`#189 <https://github.com/fmtlib/fmt/pull/189>`_,
+  `#209 <https://github.com/fmtlib/fmt/issues/209>`_).
+  Thanks to `@JodiTheTigger <https://github.com/JodiTheTigger>`_ and
+  `@xentec <https://github.com/xentec>`_.
+  
+* Documentation fixes and improvements
+  (`#36 <https://github.com/fmtlib/fmt/issues/36>`_,
+  `#75 <https://github.com/fmtlib/fmt/issues/75>`_,
+  `#125 <https://github.com/fmtlib/fmt/issues/125>`_,
+  `#160 <https://github.com/fmtlib/fmt/pull/160>`_,
+  `#161 <https://github.com/fmtlib/fmt/pull/161>`_,
+  `#162 <https://github.com/fmtlib/fmt/issues/162>`_,
+  `#165 <https://github.com/fmtlib/fmt/issues/165>`_,
+  `#210 <https://github.com/fmtlib/fmt/issues/210>`_).
+  Thanks to `@syohex (Syohei YOSHIDA) <https://github.com/syohex>`_ and
+  bug reporters.
+
+* Fixed out-of-tree documentation build
+  (`#177 <https://github.com/fmtlib/fmt/issues/177>`_).
+  Thanks to `@jackyf (Eugene V. Lyubimkin) <https://github.com/jackyf>`_.
+
+Fixes
+~~~~~
+
+* Fixed ``initializer_list`` detection
+  (`#136 <https://github.com/fmtlib/fmt/issues/136>`_).
+  Thanks to `@Gachapen (Magnus Bjerke Vik) <https://github.com/Gachapen>`_.
+
+* [Breaking] Fixed formatting of enums with numeric format specifiers in
+  ``fmt::(s)printf`` 
+  (`#131 <https://github.com/fmtlib/fmt/issues/131>`_,
+  `#139 <https://github.com/fmtlib/fmt/issues/139>`_):
+
+  .. code:: c++
+
+    enum { ANSWER = 42 };
+    fmt::printf("%d", ANSWER);
+
+  Thanks to `@Naios <https://github.com/Naios>`_.
+
+* Improved compatibility with old versions of MinGW
+  (`#129 <https://github.com/fmtlib/fmt/issues/129>`_,
+  `#130 <https://github.com/fmtlib/fmt/pull/130>`_,
+  `#132 <https://github.com/fmtlib/fmt/issues/132>`_).
+  Thanks to `@cstamford (Christopher Stamford) <https://github.com/cstamford>`_.
+
+* Fixed a compile error on MSVC with disabled exceptions
+  (`#144 <https://github.com/fmtlib/fmt/issues/144>`_).
+
+* Added a workaround for broken implementation of variadic templates in MSVC2012
+  (`#148 <https://github.com/fmtlib/fmt/issues/148>`_).
+
+* Placed the anonymous namespace within ``fmt`` namespace for the header-only
+  configuration
+  (`#171 <https://github.com/fmtlib/fmt/issues/171>`_).
+  Thanks to `@alfps (Alf P. Steinbach) <https://github.com/alfps>`_.
+
+* Fixed issues reported by Coverity Scan
+  (`#187 <https://github.com/fmtlib/fmt/issues/187>`_,
+  `#192 <https://github.com/fmtlib/fmt/issues/192>`_).
+
+* Implemented a workaround for a name lookup bug in MSVC2010
+  (`#188 <https://github.com/fmtlib/fmt/issues/188>`_).
+
+* Fixed compiler warnings
+  (`#95 <https://github.com/fmtlib/fmt/issues/95>`_,
+  `#96 <https://github.com/fmtlib/fmt/issues/96>`_,
+  `#114 <https://github.com/fmtlib/fmt/pull/114>`_,
+  `#135 <https://github.com/fmtlib/fmt/issues/135>`_,
+  `#142 <https://github.com/fmtlib/fmt/issues/142>`_,
+  `#145 <https://github.com/fmtlib/fmt/issues/145>`_,
+  `#146 <https://github.com/fmtlib/fmt/issues/146>`_,
+  `#158 <https://github.com/fmtlib/fmt/issues/158>`_,
+  `#163 <https://github.com/fmtlib/fmt/issues/163>`_,
+  `#175 <https://github.com/fmtlib/fmt/issues/175>`_,
+  `#190 <https://github.com/fmtlib/fmt/issues/190>`_,
+  `#191 <https://github.com/fmtlib/fmt/pull/191>`_,
+  `#194 <https://github.com/fmtlib/fmt/issues/194>`_,
+  `#196 <https://github.com/fmtlib/fmt/pull/196>`_,
+  `#216 <https://github.com/fmtlib/fmt/issues/216>`_,
+  `#218 <https://github.com/fmtlib/fmt/pull/218>`_,
+  `#220 <https://github.com/fmtlib/fmt/pull/220>`_,
+  `#229 <https://github.com/fmtlib/fmt/pull/229>`_,
+  `#233 <https://github.com/fmtlib/fmt/issues/233>`_,
+  `#234 <https://github.com/fmtlib/fmt/issues/234>`_,
+  `#236 <https://github.com/fmtlib/fmt/pull/236>`_,
+  `#281 <https://github.com/fmtlib/fmt/issues/281>`_,
+  `#289 <https://github.com/fmtlib/fmt/issues/289>`_).
+  Thanks to `@seanmiddleditch (Sean Middleditch) <https://github.com/seanmiddleditch>`_,
+  `@dixlorenz (Dix Lorenz) <https://github.com/dixlorenz>`_,
+  `@CarterLi (李通洲) <https://github.com/CarterLi>`_,
+  `@Naios <https://github.com/Naios>`_,
+  `@fmatthew5876 (Matthew Fioravante) <https://github.com/fmatthew5876>`_,
+  `@LevskiWeng (Levski Weng) <https://github.com/LevskiWeng>`_,
+  `@rpopescu <https://github.com/rpopescu>`_,
+  `@gabime (Gabi Melman) <https://github.com/gabime>`_,
+  `@cubicool (Jeremy Moles) <https://github.com/cubicool>`_,
+  `@jkflying (Julian Kent) <https://github.com/jkflying>`_,
+  `@LogicalKnight (Sean L) <https://github.com/LogicalKnight>`_,
+  `@inguin (Ingo van Lil) <https://github.com/inguin>`_ and
+  `@Jopie64 (Johan) <https://github.com/Jopie64>`_.
+
+* Fixed portability issues (mostly causing test failures) on ARM, ppc64, ppc64le,
+  s390x and SunOS 5.11 i386
+  (`#138 <https://github.com/fmtlib/fmt/issues/138>`_,
+  `#179 <https://github.com/fmtlib/fmt/issues/179>`_,
+  `#180 <https://github.com/fmtlib/fmt/issues/180>`_,
+  `#202 <https://github.com/fmtlib/fmt/issues/202>`_,
+  `#225 <https://github.com/fmtlib/fmt/issues/225>`_,
+  `Red Hat Bugzilla Bug 1260297 <https://bugzilla.redhat.com/show_bug.cgi?id=1260297>`_).
+  Thanks to `@Naios <https://github.com/Naios>`_,
+  `@jackyf (Eugene V. Lyubimkin) <https://github.com/jackyf>`_ and Dave Johansen.
+
+* Fixed a name conflict with macro ``free`` defined in
+  ``crtdbg.h`` when ``_CRTDBG_MAP_ALLOC`` is set
+  (`#211 <https://github.com/fmtlib/fmt/issues/211>`_).
+
+* Fixed shared library build on OS X
+  (`#212 <https://github.com/fmtlib/fmt/pull/212>`_).
+  Thanks to `@dean0x7d (Dean Moldovan) <https://github.com/dean0x7d>`_.
+
+* Fixed an overload conflict on MSVC when ``/Zc:wchar_t-`` option is specified
+  (`#214 <https://github.com/fmtlib/fmt/pull/214>`_).
+  Thanks to `@slavanap (Vyacheslav Napadovsky) <https://github.com/slavanap>`_.
+
+* Improved compatibility with MSVC 2008
+  (`#236 <https://github.com/fmtlib/fmt/pull/236>`_).
+  Thanks to `@Jopie64 (Johan) <https://github.com/Jopie64>`_.
+
+* Improved compatibility with bcc32
+  (`#227 <https://github.com/fmtlib/fmt/issues/227>`_).
+
+* Fixed ``static_assert`` detection on Clang
+  (`#228 <https://github.com/fmtlib/fmt/pull/228>`_).
+  Thanks to `@dean0x7d (Dean Moldovan) <https://github.com/dean0x7d>`_.
+
+1.1.0 - 2015-03-06
+------------------
+
+* Added ``BasicArrayWriter``, a class template that provides operations for
+  formatting and writing data into a fixed-size array
+  (`#105 <https://github.com/fmtlib/fmt/issues/105>`_ and
+  `#122 <https://github.com/fmtlib/fmt/issues/122>`_):
+
+  .. code:: c++
+  
+    char buffer[100];
+    fmt::ArrayWriter w(buffer);
+    w.write("The answer is {}", 42);
+
+* Added `0 A.D. <http://play0ad.com/>`_ and `PenUltima Online (POL)
+  <http://www.polserver.com/>`_ to the list of notable projects using C++ Format.
+
+* C++ Format now uses MSVC intrinsics for better formatting performance
+  (`#115 <https://github.com/fmtlib/fmt/pull/115>`_,
+  `#116 <https://github.com/fmtlib/fmt/pull/116>`_,
+  `#118 <https://github.com/fmtlib/fmt/pull/118>`_ and
+  `#121 <https://github.com/fmtlib/fmt/pull/121>`_).
+  Previously these optimizations where only used on GCC and Clang.
+  Thanks to `@CarterLi <https://github.com/CarterLi>`_ and
+  `@objectx <https://github.com/objectx>`_.
+
+* CMake install target (`#119 <https://github.com/fmtlib/fmt/pull/119>`_).
+  Thanks to `@TrentHouliston <https://github.com/TrentHouliston>`_.
+
+  You can now install C++ Format with ``make install`` command.
+
+* Improved `Biicode <http://www.biicode.com/>`_ support
+  (`#98 <https://github.com/fmtlib/fmt/pull/98>`_ and
+  `#104 <https://github.com/fmtlib/fmt/pull/104>`_). Thanks to
+  `@MariadeAnton <https://github.com/MariadeAnton>`_ and
+  `@franramirez688 <https://github.com/franramirez688>`_.
+
+* Improved support for building with `Android NDK
+  <https://developer.android.com/tools/sdk/ndk/index.html>`_
+  (`#107 <https://github.com/fmtlib/fmt/pull/107>`_).
+  Thanks to `@newnon <https://github.com/newnon>`_.
+  
+  The `android-ndk-example <https://github.com/fmtlib/android-ndk-example>`_
+  repository provides and example of using C++ Format with Android NDK:
+
+  .. image:: https://raw.githubusercontent.com/fmtlib/android-ndk-example/
+            master/screenshot.png
+
+* Improved documentation of ``SystemError`` and ``WindowsError``
+  (`#54 <https://github.com/fmtlib/fmt/issues/54>`_).
+
+* Various code improvements
+  (`#110 <https://github.com/fmtlib/fmt/pull/110>`_,
+  `#111 <https://github.com/fmtlib/fmt/pull/111>`_
+  `#112 <https://github.com/fmtlib/fmt/pull/112>`_).
+  Thanks to `@CarterLi <https://github.com/CarterLi>`_.
+
+* Improved compile-time errors when formatting wide into narrow strings
+  (`#117 <https://github.com/fmtlib/fmt/issues/117>`_).
+
+* Fixed ``BasicWriter::write`` without formatting arguments when C++11 support
+  is disabled (`#109 <https://github.com/fmtlib/fmt/issues/109>`_).
+
+* Fixed header-only build on OS X with GCC 4.9
+  (`#124 <https://github.com/fmtlib/fmt/issues/124>`_).
+
+* Fixed packaging issues (`#94 <https://github.com/fmtlib/fmt/issues/94>`_).
+
+* Added `changelog <https://github.com/fmtlib/fmt/blob/master/ChangeLog.rst>`_
+  (`#103 <https://github.com/fmtlib/fmt/issues/103>`_).
+
+1.0.0 - 2015-02-05
+------------------
+
+* Add support for a header-only configuration when ``FMT_HEADER_ONLY`` is
+  defined before including ``format.h``:
+
+  .. code:: c++
+
+    #define FMT_HEADER_ONLY
+    #include "format.h"
+
+* Compute string length in the constructor of ``BasicStringRef``
+  instead of the ``size`` method
+  (`#79 <https://github.com/fmtlib/fmt/issues/79>`_).
+  This eliminates size computation for string literals on reasonable optimizing
+  compilers.
+
+* Fix formatting of types with overloaded ``operator <<`` for ``std::wostream``
+  (`#86 <https://github.com/fmtlib/fmt/issues/86>`_):
+
+  .. code:: c++
+
+    fmt::format(L"The date is {0}", Date(2012, 12, 9));
+
+* Fix linkage of tests on Arch Linux
+  (`#89 <https://github.com/fmtlib/fmt/issues/89>`_).
+
+* Allow precision specifier for non-float arguments
+  (`#90 <https://github.com/fmtlib/fmt/issues/90>`_):
+
+  .. code:: c++
+
+    fmt::print("{:.3}\n", "Carpet"); // prints "Car"
+
+* Fix build on Android NDK
+  (`#93 <https://github.com/fmtlib/fmt/issues/93>`_)
+
+* Improvements to documentation build procedure.
+
+* Remove ``FMT_SHARED`` CMake variable in favor of standard `BUILD_SHARED_LIBS
+  <http://www.cmake.org/cmake/help/v3.0/variable/BUILD_SHARED_LIBS.html>`_.
+
+* Fix error handling in ``fmt::fprintf``.
+
+* Fix a number of warnings.
+
+0.12.0 - 2014-10-25
+-------------------
+
+* [Breaking] Improved separation between formatting and buffer management.
+  ``Writer`` is now a base class that cannot be instantiated directly.
+  The new ``MemoryWriter`` class implements the default buffer management
+  with small allocations done on stack. So ``fmt::Writer`` should be replaced
+  with ``fmt::MemoryWriter`` in variable declarations.
+
+  Old code:
+
+  .. code:: c++
+
+    fmt::Writer w;
+
+  New code: 
+
+  .. code:: c++
+
+    fmt::MemoryWriter w;
+
+  If you pass ``fmt::Writer`` by reference, you can continue to do so:
+
+  .. code:: c++
+
+      void f(fmt::Writer &w);
+
+  This doesn't affect the formatting API.
+
+* Support for custom memory allocators
+  (`#69 <https://github.com/fmtlib/fmt/issues/69>`_)
+
+* Formatting functions now accept `signed char` and `unsigned char` strings as
+  arguments (`#73 <https://github.com/fmtlib/fmt/issues/73>`_):
+
+  .. code:: c++
+
+    auto s = format("GLSL version: {}", glGetString(GL_VERSION));
+
+* Reduced code bloat. According to the new `benchmark results
+  <https://github.com/fmtlib/fmt#compile-time-and-code-bloat>`_,
+  cppformat is close to ``printf`` and by the order of magnitude better than
+  Boost Format in terms of compiled code size.
+
+* Improved appearance of the documentation on mobile by using the `Sphinx
+  Bootstrap theme <http://ryan-roemer.github.io/sphinx-bootstrap-theme/>`_:
+
+  .. |old| image:: https://cloud.githubusercontent.com/assets/576385/4792130/
+                   cd256436-5de3-11e4-9a62-c077d0c2b003.png
+
+  .. |new| image:: https://cloud.githubusercontent.com/assets/576385/4792131/
+                   cd29896c-5de3-11e4-8f59-cac952942bf0.png
+  
+  +-------+-------+
+  |  Old  |  New  |
+  +-------+-------+
+  | |old| | |new| |
+  +-------+-------+
+
+0.11.0 - 2014-08-21
+-------------------
+
+* Safe printf implementation with a POSIX extension for positional arguments:
+
+  .. code:: c++
+
+    fmt::printf("Elapsed time: %.2f seconds", 1.23);
+    fmt::printf("%1$s, %3$d %2$s", weekday, month, day);
+
+* Arguments of ``char`` type can now be formatted as integers
+  (Issue `#55 <https://github.com/fmtlib/fmt/issues/55>`_):
+
+  .. code:: c++
+
+    fmt::format("0x{0:02X}", 'a');
+
+* Deprecated parts of the API removed.
+
+* The library is now built and tested on MinGW with Appveyor in addition to
+  existing test platforms Linux/GCC, OS X/Clang, Windows/MSVC.
+
+0.10.0 - 2014-07-01
+-------------------
+
+**Improved API**
+
+* All formatting methods are now implemented as variadic functions instead
+  of using ``operator<<`` for feeding arbitrary arguments into a temporary
+  formatter object. This works both with C++11 where variadic templates are
+  used and with older standards where variadic functions are emulated by
+  providing lightweight wrapper functions defined with the ``FMT_VARIADIC``
+  macro. You can use this macro for defining your own portable variadic
+  functions:
+
+  .. code:: c++
+
+    void report_error(const char *format, const fmt::ArgList &args) {
+      fmt::print("Error: {}");
+      fmt::print(format, args);
+    }
+    FMT_VARIADIC(void, report_error, const char *)
+
+    report_error("file not found: {}", path);
+
+  Apart from a more natural syntax, this also improves performance as there
+  is no need to construct temporary formatter objects and control arguments'
+  lifetimes. Because the wrapper functions are very lightweight, this doesn't
+  cause code bloat even in pre-C++11 mode.
+
+* Simplified common case of formatting an ``std::string``. Now it requires a
+  single function call:
+
+  .. code:: c++
+
+    std::string s = format("The answer is {}.", 42);
+
+  Previously it required 2 function calls:
+
+  .. code:: c++
+
+    std::string s = str(Format("The answer is {}.") << 42);
+
+  Instead of unsafe ``c_str`` function, ``fmt::Writer`` should be used directly
+  to bypass creation of ``std::string``:
+
+  .. code:: c++
+
+    fmt::Writer w;
+    w.write("The answer is {}.", 42);
+    w.c_str();  // returns a C string
+
+  This doesn't do dynamic memory allocation for small strings and is less error
+  prone as the lifetime of the string is the same as for ``std::string::c_str``
+  which is well understood (hopefully).
+
+* Improved consistency in naming functions that are a part of the public API.
+  Now all public functions are lowercase following the standard library
+  conventions. Previously it was a combination of lowercase and
+  CapitalizedWords.
+  Issue `#50 <https://github.com/fmtlib/fmt/issues/50>`_.
+
+* Old functions are marked as deprecated and will be removed in the next
+  release.
+
+**Other Changes**
+
+* Experimental support for printf format specifications (work in progress):
+
+  .. code:: c++
+
+    fmt::printf("The answer is %d.", 42);
+    std::string s = fmt::sprintf("Look, a %s!", "string");
+
+* Support for hexadecimal floating point format specifiers ``a`` and ``A``:
+
+  .. code:: c++
+
+    print("{:a}", -42.0); // Prints -0x1.5p+5
+    print("{:A}", -42.0); // Prints -0X1.5P+5
+
+* CMake option ``FMT_SHARED`` that specifies whether to build format as a
+  shared library (off by default).
+
+0.9.0 - 2014-05-13
+------------------
+
+* More efficient implementation of variadic formatting functions.
+
+* ``Writer::Format`` now has a variadic overload:
+
+  .. code:: c++
+
+    Writer out;
+    out.Format("Look, I'm {}!", "variadic");
+
+* For efficiency and consistency with other overloads, variadic overload of
+  the ``Format`` function now returns ``Writer`` instead of ``std::string``.
+  Use the ``str`` function to convert it to ``std::string``:
+
+  .. code:: c++
+
+    std::string s = str(Format("Look, I'm {}!", "variadic"));
+
+* Replaced formatter actions with output sinks: ``NoAction`` -> ``NullSink``,
+  ``Write`` -> ``FileSink``, ``ColorWriter`` -> ``ANSITerminalSink``.
+  This improves naming consistency and shouldn't affect client code unless
+  these classes are used directly which should be rarely needed.
+
+* Added ``ThrowSystemError`` function that formats a message and throws
+  ``SystemError`` containing the formatted message and system-specific error
+  description. For example, the following code
+
+  .. code:: c++
+
+    FILE *f = fopen(filename, "r");
+    if (!f)
+      ThrowSystemError(errno, "Failed to open file '{}'") << filename;
+
+  will throw ``SystemError`` exception with description
+  "Failed to open file '<filename>': No such file or directory" if file
+  doesn't exist.
+
+* Support for AppVeyor continuous integration platform.
+
+* ``Format`` now throws ``SystemError`` in case of I/O errors.
+
+* Improve test infrastructure. Print functions are now tested by redirecting
+  the output to a pipe.
+
+0.8.0 - 2014-04-14
+------------------
+
+* Initial release
diff --git a/3rdparty/fmt/LICENSE.rst b/3rdparty/fmt/LICENSE.rst
new file mode 100644
index 00000000..f0ec3db4
--- /dev/null
+++ b/3rdparty/fmt/LICENSE.rst
@@ -0,0 +1,27 @@
+Copyright (c) 2012 - present, Victor Zverovich
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+--- Optional exception to the license ---
+
+As an exception, if, as a result of your compiling your source code, portions
+of this Software are embedded into a machine-executable object form of such
+source code, you may redistribute such embedded portions in such object form
+without including the above copyright and permission notices.
diff --git a/3rdparty/fmt/README.rst b/3rdparty/fmt/README.rst
new file mode 100644
index 00000000..394f28d9
--- /dev/null
+++ b/3rdparty/fmt/README.rst
@@ -0,0 +1,528 @@
+{fmt}
+=====
+
+.. image:: https://github.com/fmtlib/fmt/workflows/linux/badge.svg
+   :target: https://github.com/fmtlib/fmt/actions?query=workflow%3Alinux
+
+.. image:: https://github.com/fmtlib/fmt/workflows/macos/badge.svg
+   :target: https://github.com/fmtlib/fmt/actions?query=workflow%3Amacos
+
+.. image:: https://github.com/fmtlib/fmt/workflows/windows/badge.svg
+   :target: https://github.com/fmtlib/fmt/actions?query=workflow%3Awindows
+
+.. image:: https://ci.appveyor.com/api/projects/status/ehjkiefde6gucy1v?svg=true
+   :target: https://ci.appveyor.com/project/vitaut/fmt
+
+.. image:: https://oss-fuzz-build-logs.storage.googleapis.com/badges/fmt.svg
+   :alt: fmt is continuously fuzzed at oss-fuzz
+   :target: https://bugs.chromium.org/p/oss-fuzz/issues/list?\
+            colspec=ID%20Type%20Component%20Status%20Proj%20Reported%20Owner%20\
+            Summary&q=proj%3Dfmt&can=1
+
+.. image:: https://img.shields.io/badge/stackoverflow-fmt-blue.svg
+   :alt: Ask questions at StackOverflow with the tag fmt
+   :target: https://stackoverflow.com/questions/tagged/fmt
+
+**{fmt}** is an open-source formatting library providing a fast and safe
+alternative to C stdio and C++ iostreams.
+
+If you like this project, please consider donating to the BYSOL
+Foundation that helps victims of political repressions in Belarus:
+https://bysol.org/en/bs/general/.
+
+`Documentation <https://fmt.dev>`__
+
+Q&A: ask questions on `StackOverflow with the tag fmt
+<https://stackoverflow.com/questions/tagged/fmt>`_.
+
+Try {fmt} in `Compiler Explorer <https://godbolt.org/z/Eq5763>`_.
+
+Features
+--------
+
+* Simple `format API <https://fmt.dev/latest/api.html>`_ with positional arguments
+  for localization
+* Implementation of `C++20 std::format
+  <https://en.cppreference.com/w/cpp/utility/format>`__
+* `Format string syntax <https://fmt.dev/latest/syntax.html>`_ similar to Python's
+  `format <https://docs.python.org/3/library/stdtypes.html#str.format>`_
+* Fast IEEE 754 floating-point formatter with correct rounding, shortness and
+  round-trip guarantees
+* Safe `printf implementation
+  <https://fmt.dev/latest/api.html#printf-formatting>`_ including the POSIX
+  extension for positional arguments
+* Extensibility: `support for user-defined types
+  <https://fmt.dev/latest/api.html#formatting-user-defined-types>`_
+* High performance: faster than common standard library implementations of
+  ``(s)printf``, iostreams, ``to_string`` and ``to_chars``, see `Speed tests`_
+  and `Converting a hundred million integers to strings per second
+  <http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html>`_
+* Small code size both in terms of source code with the minimum configuration
+  consisting of just three files, ``core.h``, ``format.h`` and ``format-inl.h``,
+  and compiled code; see `Compile time and code bloat`_
+* Reliability: the library has an extensive set of `tests
+  <https://github.com/fmtlib/fmt/tree/master/test>`_ and is `continuously fuzzed
+  <https://bugs.chromium.org/p/oss-fuzz/issues/list?colspec=ID%20Type%20
+  Component%20Status%20Proj%20Reported%20Owner%20Summary&q=proj%3Dfmt&can=1>`_
+* Safety: the library is fully type safe, errors in format strings can be
+  reported at compile time, automatic memory management prevents buffer overflow
+  errors
+* Ease of use: small self-contained code base, no external dependencies,
+  permissive MIT `license
+  <https://github.com/fmtlib/fmt/blob/master/LICENSE.rst>`_
+* `Portability <https://fmt.dev/latest/index.html#portability>`_ with
+  consistent output across platforms and support for older compilers
+* Clean warning-free codebase even on high warning levels such as
+  ``-Wall -Wextra -pedantic``
+* Locale-independence by default
+* Optional header-only configuration enabled with the ``FMT_HEADER_ONLY`` macro
+
+See the `documentation <https://fmt.dev>`_ for more details.
+
+Examples
+--------
+
+**Print to stdout** (`run <https://godbolt.org/z/Tevcjh>`_)
+
+.. code:: c++
+
+    #include <fmt/core.h>
+    
+    int main() {
+      fmt::print("Hello, world!\n");
+    }
+
+**Format a string** (`run <https://godbolt.org/z/oK8h33>`_)
+
+.. code:: c++
+
+    std::string s = fmt::format("The answer is {}.", 42);
+    // s == "The answer is 42."
+
+**Format a string using positional arguments** (`run <https://godbolt.org/z/Yn7Txe>`_)
+
+.. code:: c++
+
+    std::string s = fmt::format("I'd rather be {1} than {0}.", "right", "happy");
+    // s == "I'd rather be happy than right."
+
+**Print chrono durations** (`run <https://godbolt.org/z/K8s4Mc>`_)
+
+.. code:: c++
+
+    #include <fmt/chrono.h>
+
+    int main() {
+      using namespace std::literals::chrono_literals;
+      fmt::print("Default format: {} {}\n", 42s, 100ms);
+      fmt::print("strftime-like format: {:%H:%M:%S}\n", 3h + 15min + 30s);
+    }
+
+Output::
+
+    Default format: 42s 100ms
+    strftime-like format: 03:15:30
+
+**Print a container** (`run <https://godbolt.org/z/MjsY7c>`_)
+
+.. code:: c++
+
+    #include <vector>
+    #include <fmt/ranges.h>
+
+    int main() {
+      std::vector<int> v = {1, 2, 3};
+      fmt::print("{}\n", v);
+    }
+
+Output::
+
+    [1, 2, 3]
+
+**Check a format string at compile time**
+
+.. code:: c++
+
+    std::string s = fmt::format("{:d}", "I am not a number");
+
+This gives a compile-time error in C++20 because ``d`` is an invalid format
+specifier for a string.
+
+**Write a file from a single thread**
+
+.. code:: c++
+
+    #include <fmt/os.h>
+
+    int main() {
+      auto out = fmt::output_file("guide.txt");
+      out.print("Don't {}", "Panic");
+    }
+
+This can be `5 to 9 times faster than fprintf
+<http://www.zverovich.net/2020/08/04/optimal-file-buffer-size.html>`_.
+
+**Print with colors and text styles**
+
+.. code:: c++
+
+    #include <fmt/color.h>
+
+    int main() {
+      fmt::print(fg(fmt::color::crimson) | fmt::emphasis::bold,
+                 "Hello, {}!\n", "world");
+      fmt::print(fg(fmt::color::floral_white) | bg(fmt::color::slate_gray) |
+                 fmt::emphasis::underline, "Hello, {}!\n", "мир");
+      fmt::print(fg(fmt::color::steel_blue) | fmt::emphasis::italic,
+                 "Hello, {}!\n", "世界");
+    }
+
+Output on a modern terminal:
+
+.. image:: https://user-images.githubusercontent.com/
+           576385/88485597-d312f600-cf2b-11ea-9cbe-61f535a86e28.png
+
+Benchmarks
+----------
+
+Speed tests
+~~~~~~~~~~~
+
+================= ============= ===========
+Library           Method        Run Time, s
+================= ============= ===========
+libc              printf          1.04
+libc++            std::ostream    3.05
+{fmt} 6.1.1       fmt::print      0.75
+Boost Format 1.67 boost::format   7.24
+Folly Format      folly::format   2.23
+================= ============= ===========
+
+{fmt} is the fastest of the benchmarked methods, ~35% faster than ``printf``.
+
+The above results were generated by building ``tinyformat_test.cpp`` on macOS
+10.14.6 with ``clang++ -O3 -DNDEBUG -DSPEED_TEST -DHAVE_FORMAT``, and taking the
+best of three runs. In the test, the format string ``"%0.10f:%04d:%+g:%s:%p:%c:%%\n"``
+or equivalent is filled 2,000,000 times with output sent to ``/dev/null``; for
+further details refer to the `source
+<https://github.com/fmtlib/format-benchmark/blob/master/src/tinyformat-test.cc>`_.
+
+{fmt} is up to 20-30x faster than ``std::ostringstream`` and ``sprintf`` on
+floating-point formatting (`dtoa-benchmark <https://github.com/fmtlib/dtoa-benchmark>`_)
+and faster than `double-conversion <https://github.com/google/double-conversion>`_ and
+`ryu <https://github.com/ulfjack/ryu>`_:
+
+.. image:: https://user-images.githubusercontent.com/576385/
+           95684665-11719600-0ba8-11eb-8e5b-972ff4e49428.png
+   :target: https://fmt.dev/unknown_mac64_clang12.0.html
+
+Compile time and code bloat
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The script `bloat-test.py
+<https://github.com/fmtlib/format-benchmark/blob/master/bloat-test.py>`_
+from `format-benchmark <https://github.com/fmtlib/format-benchmark>`_
+tests compile time and code bloat for nontrivial projects.
+It generates 100 translation units and uses ``printf()`` or its alternative
+five times in each to simulate a medium sized project.  The resulting
+executable size and compile time (Apple LLVM version 8.1.0 (clang-802.0.42),
+macOS Sierra, best of three) is shown in the following tables.
+
+**Optimized build (-O3)**
+
+============= =============== ==================== ==================
+Method        Compile Time, s Executable size, KiB Stripped size, KiB
+============= =============== ==================== ==================
+printf                    2.6                   29                 26
+printf+string            16.4                   29                 26
+iostreams                31.1                   59                 55
+{fmt}                    19.0                   37                 34
+Boost Format             91.9                  226                203
+Folly Format            115.7                  101                 88
+============= =============== ==================== ==================
+
+As you can see, {fmt} has 60% less overhead in terms of resulting binary code
+size compared to iostreams and comes pretty close to ``printf``. Boost Format
+and Folly Format have the largest overheads.
+
+``printf+string`` is the same as ``printf`` but with extra ``<string>``
+include to measure the overhead of the latter.
+
+**Non-optimized build**
+
+============= =============== ==================== ==================
+Method        Compile Time, s Executable size, KiB Stripped size, KiB
+============= =============== ==================== ==================
+printf                    2.2                   33                 30
+printf+string            16.0                   33                 30
+iostreams                28.3                   56                 52
+{fmt}                    18.2                   59                 50
+Boost Format             54.1                  365                303
+Folly Format             79.9                  445                430
+============= =============== ==================== ==================
+
+``libc``, ``lib(std)c++`` and ``libfmt`` are all linked as shared libraries to
+compare formatting function overhead only. Boost Format is a
+header-only library so it doesn't provide any linkage options.
+
+Running the tests
+~~~~~~~~~~~~~~~~~
+
+Please refer to `Building the library`__ for the instructions on how to build
+the library and run the unit tests.
+
+__ https://fmt.dev/latest/usage.html#building-the-library
+
+Benchmarks reside in a separate repository,
+`format-benchmarks <https://github.com/fmtlib/format-benchmark>`_,
+so to run the benchmarks you first need to clone this repository and
+generate Makefiles with CMake::
+
+    $ git clone --recursive https://github.com/fmtlib/format-benchmark.git
+    $ cd format-benchmark
+    $ cmake .
+
+Then you can run the speed test::
+
+    $ make speed-test
+
+or the bloat test::
+
+    $ make bloat-test
+    
+Migrating code
+--------------
+
+`clang-tidy-fmt <https://github.com/mikecrowe/clang-tidy-fmt>`_ provides clang
+tidy checks for converting occurrences of ``printf`` and ``fprintf`` to
+``fmt::print``.
+
+Projects using this library
+---------------------------
+
+* `0 A.D. <https://play0ad.com/>`_: a free, open-source, cross-platform
+  real-time strategy game
+
+* `2GIS <https://2gis.ru/>`_: free business listings with a city map
+
+* `AMPL/MP <https://github.com/ampl/mp>`_:
+  an open-source library for mathematical programming
+
+* `Aseprite <https://github.com/aseprite/aseprite>`_:
+  animated sprite editor & pixel art tool 
+
+* `AvioBook <https://www.aviobook.aero/en>`_: a comprehensive aircraft
+  operations suite
+  
+* `Blizzard Battle.net <https://battle.net/>`_: an online gaming platform
+  
+* `Celestia <https://celestia.space/>`_: real-time 3D visualization of space
+
+* `Ceph <https://ceph.com/>`_: a scalable distributed storage system
+
+* `ccache <https://ccache.dev/>`_: a compiler cache
+
+* `ClickHouse <https://github.com/ClickHouse/ClickHouse>`_: analytical database
+  management system
+
+* `CUAUV <https://cuauv.org/>`_: Cornell University's autonomous underwater
+  vehicle
+
+* `Drake <https://drake.mit.edu/>`_: a planning, control, and analysis toolbox
+  for nonlinear dynamical systems (MIT)
+
+* `Envoy <https://lyft.github.io/envoy/>`_: C++ L7 proxy and communication bus
+  (Lyft)
+
+* `FiveM <https://fivem.net/>`_: a modification framework for GTA V
+
+* `fmtlog <https://github.com/MengRao/fmtlog>`_: a performant fmtlib-style
+  logging library with latency in nanoseconds
+
+* `Folly <https://github.com/facebook/folly>`_: Facebook open-source library
+
+* `Grand Mountain Adventure
+  <https://store.steampowered.com/app/1247360/Grand_Mountain_Adventure/>`_:
+  A beautiful open-world ski & snowboarding game
+
+* `HarpyWar/pvpgn <https://github.com/pvpgn/pvpgn-server>`_:
+  Player vs Player Gaming Network with tweaks
+
+* `KBEngine <https://github.com/kbengine/kbengine>`_: an open-source MMOG server
+  engine
+
+* `Keypirinha <https://keypirinha.com/>`_: a semantic launcher for Windows
+
+* `Kodi <https://kodi.tv/>`_ (formerly xbmc): home theater software
+
+* `Knuth <https://kth.cash/>`_: high-performance Bitcoin full-node
+
+* `Microsoft Verona <https://github.com/microsoft/verona>`_:
+  research programming language for concurrent ownership
+
+* `MongoDB <https://mongodb.com/>`_: distributed document database
+
+* `MongoDB Smasher <https://github.com/duckie/mongo_smasher>`_: a small tool to
+  generate randomized datasets
+
+* `OpenSpace <https://openspaceproject.com/>`_: an open-source
+  astrovisualization framework
+
+* `PenUltima Online (POL) <https://www.polserver.com/>`_:
+  an MMO server, compatible with most Ultima Online clients
+
+* `PyTorch <https://github.com/pytorch/pytorch>`_: an open-source machine
+  learning library
+
+* `quasardb <https://www.quasardb.net/>`_: a distributed, high-performance,
+  associative database
+  
+* `Quill <https://github.com/odygrd/quill>`_: asynchronous low-latency logging library
+
+* `QKW <https://github.com/ravijanjam/qkw>`_: generalizing aliasing to simplify
+  navigation, and executing complex multi-line terminal command sequences
+
+* `redis-cerberus <https://github.com/HunanTV/redis-cerberus>`_: a Redis cluster
+  proxy
+
+* `redpanda <https://vectorized.io/redpanda>`_: a 10x faster Kafka® replacement
+  for mission critical systems written in C++
+
+* `rpclib <http://rpclib.net/>`_: a modern C++ msgpack-RPC server and client
+  library
+
+* `Salesforce Analytics Cloud
+  <https://www.salesforce.com/analytics-cloud/overview/>`_:
+  business intelligence software
+
+* `Scylla <https://www.scylladb.com/>`_: a Cassandra-compatible NoSQL data store
+  that can handle 1 million transactions per second on a single server
+
+* `Seastar <http://www.seastar-project.org/>`_: an advanced, open-source C++
+  framework for high-performance server applications on modern hardware
+
+* `spdlog <https://github.com/gabime/spdlog>`_: super fast C++ logging library
+
+* `Stellar <https://www.stellar.org/>`_: financial platform
+
+* `Touch Surgery <https://www.touchsurgery.com/>`_: surgery simulator
+
+* `TrinityCore <https://github.com/TrinityCore/TrinityCore>`_: open-source
+  MMORPG framework
+
+* `Windows Terminal <https://github.com/microsoft/terminal>`_: the new Windows
+  terminal
+
+`More... <https://github.com/search?q=fmtlib&type=Code>`_
+
+If you are aware of other projects using this library, please let me know
+by `email <mailto:victor.zverovich@gmail.com>`_ or by submitting an
+`issue <https://github.com/fmtlib/fmt/issues>`_.
+
+Motivation
+----------
+
+So why yet another formatting library?
+
+There are plenty of methods for doing this task, from standard ones like
+the printf family of function and iostreams to Boost Format and FastFormat
+libraries. The reason for creating a new library is that every existing
+solution that I found either had serious issues or didn't provide
+all the features I needed.
+
+printf
+~~~~~~
+
+The good thing about ``printf`` is that it is pretty fast and readily available
+being a part of the C standard library. The main drawback is that it
+doesn't support user-defined types. ``printf`` also has safety issues although
+they are somewhat mitigated with `__attribute__ ((format (printf, ...))
+<https://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html>`_ in GCC.
+There is a POSIX extension that adds positional arguments required for
+`i18n <https://en.wikipedia.org/wiki/Internationalization_and_localization>`_
+to ``printf`` but it is not a part of C99 and may not be available on some
+platforms.
+
+iostreams
+~~~~~~~~~
+
+The main issue with iostreams is best illustrated with an example:
+
+.. code:: c++
+
+    std::cout << std::setprecision(2) << std::fixed << 1.23456 << "\n";
+
+which is a lot of typing compared to printf:
+
+.. code:: c++
+
+    printf("%.2f\n", 1.23456);
+
+Matthew Wilson, the author of FastFormat, called this "chevron hell". iostreams
+don't support positional arguments by design.
+
+The good part is that iostreams support user-defined types and are safe although
+error handling is awkward.
+
+Boost Format
+~~~~~~~~~~~~
+
+This is a very powerful library which supports both ``printf``-like format
+strings and positional arguments. Its main drawback is performance. According to
+various benchmarks, it is much slower than other methods considered here. Boost
+Format also has excessive build times and severe code bloat issues (see
+`Benchmarks`_).
+
+FastFormat
+~~~~~~~~~~
+
+This is an interesting library which is fast, safe and has positional arguments.
+However, it has significant limitations, citing its author:
+
+    Three features that have no hope of being accommodated within the
+    current design are:
+
+    * Leading zeros (or any other non-space padding)
+    * Octal/hexadecimal encoding
+    * Runtime width/alignment specification
+
+It is also quite big and has a heavy dependency, STLSoft, which might be too
+restrictive for using it in some projects.
+
+Boost Spirit.Karma
+~~~~~~~~~~~~~~~~~~
+
+This is not really a formatting library but I decided to include it here for
+completeness. As iostreams, it suffers from the problem of mixing verbatim text
+with arguments. The library is pretty fast, but slower on integer formatting
+than ``fmt::format_to`` with format string compilation on Karma's own benchmark,
+see `Converting a hundred million integers to strings per second
+<http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html>`_.
+
+License
+-------
+
+{fmt} is distributed under the MIT `license
+<https://github.com/fmtlib/fmt/blob/master/LICENSE.rst>`_.
+
+Documentation License
+---------------------
+
+The `Format String Syntax <https://fmt.dev/latest/syntax.html>`_
+section in the documentation is based on the one from Python `string module
+documentation <https://docs.python.org/3/library/string.html#module-string>`_.
+For this reason the documentation is distributed under the Python Software
+Foundation license available in `doc/python-license.txt
+<https://raw.github.com/fmtlib/fmt/master/doc/python-license.txt>`_.
+It only applies if you distribute the documentation of {fmt}.
+
+Maintainers
+-----------
+
+The {fmt} library is maintained by Victor Zverovich (`vitaut
+<https://github.com/vitaut>`_) and Jonathan Müller (`foonathan
+<https://github.com/foonathan>`_) with contributions from many other people.
+See `Contributors <https://github.com/fmtlib/fmt/graphs/contributors>`_ and
+`Releases <https://github.com/fmtlib/fmt/releases>`_ for some of the names.
+Let us know if your contribution is not listed or mentioned incorrectly and
+we'll make it right.
diff --git a/3rdparty/fmt/doc/CMakeLists.txt b/3rdparty/fmt/doc/CMakeLists.txt
new file mode 100644
index 00000000..06848450
--- /dev/null
+++ b/3rdparty/fmt/doc/CMakeLists.txt
@@ -0,0 +1,17 @@
+find_program(DOXYGEN doxygen)
+if (NOT DOXYGEN)
+  message(STATUS "Target 'doc' disabled (requires doxygen)")
+  return ()
+endif ()
+
+find_package(PythonInterp QUIET REQUIRED)
+
+add_custom_target(doc
+  COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/build.py
+                               ${FMT_VERSION}
+  SOURCES api.rst syntax.rst usage.rst build.py conf.py _templates/layout.html)
+
+include(GNUInstallDirs)
+install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/html/
+        DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/doc/fmt OPTIONAL
+        PATTERN ".doctrees" EXCLUDE)
diff --git a/3rdparty/fmt/doc/_static/bootstrap.min.js b/3rdparty/fmt/doc/_static/bootstrap.min.js
new file mode 100644
index 00000000..c8f82e59
--- /dev/null
+++ b/3rdparty/fmt/doc/_static/bootstrap.min.js
@@ -0,0 +1,7 @@
+/*!
+ * Bootstrap v3.3.4 (http://getbootstrap.com)
+ * Copyright 2011-2015 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ */
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a(b.target).is(this)?b.handleObj.handler.apply(this,arguments):void 0}})})}(jQuery),+function(a){"use strict";function b(b){return this.each(function(){var c=a(this),e=c.data("bs.alert");e||c.data("bs.alert",e=new d(this)),"string"==typeof b&&e[b].call(c)})}var c='[data-dismiss="alert"]',d=function(b){a(b).on("click",c,this.close)};d.VERSION="3.3.4",d.TRANSITION_DURATION=150,d.prototype.close=function(b){function c(){g.detach().trigger("closed.bs.alert").remove()}var e=a(this),f=e.attr("data-target");f||(f=e.attr("href"),f=f&&f.replace(/.*(?=#[^\s]*$)/,""));var g=a(f);b&&b.preventDefault(),g.length||(g=e.closest(".alert")),g.trigger(b=a.Event("close.bs.alert")),b.isDefaultPrevented()||(g.removeClass("in"),a.support.transition&&g.hasClass("fade")?g.one("bsTransitionEnd",c).emulateTransitionEnd(d.TRANSITION_DURATION):c())};var e=a.fn.alert;a.fn.alert=b,a.fn.alert.Constructor=d,a.fn.alert.noConflict=function(){return 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diff --git a/3rdparty/fmt/doc/_static/breathe.css b/3rdparty/fmt/doc/_static/breathe.css
new file mode 100644
index 00000000..2a1534b0
--- /dev/null
+++ b/3rdparty/fmt/doc/_static/breathe.css
@@ -0,0 +1,28 @@
+
+/* -- breathe specific styles ----------------------------------------------- */
+
+/* So enum value descriptions are displayed inline to the item */
+.breatheenumvalues li tt + p {
+  display: inline;
+}
+
+/* So parameter descriptions are displayed inline to the item */
+.breatheparameterlist li tt + p {
+  display: inline;
+}
+
+.container .breathe-sectiondef {
+  width: inherit;
+}
+
+.github-btn {
+  border: 0;
+  overflow: hidden;
+}
+
+.jumbotron {
+  background-size: 100% 4px;
+  background-repeat: repeat-y;
+  color: white;
+  text-align: center;
+}
diff --git a/3rdparty/fmt/doc/_static/fonts/glyphicons-halflings-regular.eot b/3rdparty/fmt/doc/_static/fonts/glyphicons-halflings-regular.eot
new file mode 100644
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diff --git a/3rdparty/fmt/doc/_static/fonts/glyphicons-halflings-regular.svg b/3rdparty/fmt/doc/_static/fonts/glyphicons-halflings-regular.svg
new file mode 100644
index 00000000..e3e2dc73
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diff --git a/3rdparty/fmt/doc/_templates/layout.html b/3rdparty/fmt/doc/_templates/layout.html
new file mode 100644
index 00000000..333a606c
--- /dev/null
+++ b/3rdparty/fmt/doc/_templates/layout.html
@@ -0,0 +1,148 @@
+{% extends "!layout.html" %}
+
+{% block extrahead %}
+<meta name="description" content="Small, safe and fast formatting library">
+<meta name="keywords" content="C++, formatting, printf, string, library">
+<meta name="author" content="Victor Zverovich">
+<link rel="stylesheet" href="_static/fmt.css">
+{# Google Analytics #}
+<script async src="https://www.googletagmanager.com/gtag/js?id=UA-20116650-4"></script>
+<script>
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  gtag('js', new Date());
+
+  gtag('config', 'UA-20116650-4');
+</script>
+{% endblock %}
+
+{%- macro searchform(classes, button) %}
+<form class="{{classes}}" role="search" action="{{ pathto('search') }}"
+      method="get">
+  <div class="form-group">
+    <input type="text" name="q" class="form-control"
+           {{ 'placeholder="Search"' if not button }} >
+  </div>
+  <input type="hidden" name="check_keywords" value="yes" />
+  <input type="hidden" name="area" value="default" />
+  {% if button %}
+    <input type="submit" class="btn btn-default" value="search">
+  {% endif %}
+</form>
+{%- endmacro %}
+
+{% block header %}
+<nav class="navbar navbar-inverse">
+  <div class="tb-container">
+    <div class="row">
+      <div class="navbar-content">
+        {# Brand and toggle get grouped for better mobile display #}
+        <div class="navbar-header">
+          <button type="button" class="navbar-toggle collapsed"
+                  data-toggle="collapse" data-target=".navbar-collapse">
+            <span class="sr-only">Toggle navigation</span>
+            <span class="icon-bar"></span>
+            <span class="icon-bar"></span>
+            <span class="icon-bar"></span>
+          </button>
+          <a class="navbar-brand" href="index.html">{fmt}</a>
+        </div>
+
+        {# Collect the nav links, forms, and other content for toggling #}
+        <div class="collapse navbar-collapse">
+          <ul class="nav navbar-nav">
+            <li class="dropdown">
+              <a href="#" class="dropdown-toggle" data-toggle="dropdown"
+                 role="button" aria-expanded="false">{{ version }}
+                <span class="caret"></span></a>
+              <ul class="dropdown-menu" role="menu">
+                {% for v in versions.split(',') %}
+                <li><a href="https://fmt.dev/{{v}}">{{v}}</a></li>
+                {% endfor %}
+              </ul>
+            </li>
+            {% for name in ['Contents', 'Usage', 'API', 'Syntax'] %}
+              {% if pagename == name.lower() %}
+              <li class="active"><a href="{{name.lower()}}.html">{{name}}
+                <span class="sr-only">(current)</span></a></li>
+              {%else%}
+              <li><a href="{{name.lower()}}.html">{{name}}</a></li>
+              {%endif%}
+            {% endfor %}
+          </ul>
+          {% if pagename != 'search' %}
+            {{ searchform('navbar-form navbar-right', False) }}
+          {%endif%}
+        </div> {# /.navbar-collapse #}
+      </div> {# /.col-md-offset-2 #}
+    </div> {# /.row #}
+  </div> {# /.tb-container #}
+</nav>
+{% if pagename == "index" %}
+{% set download_url = 'https://github.com/fmtlib/fmt/releases/download' %}
+<div class="jumbotron">
+  <div class="tb-container">
+    <h1>{fmt}</h1>
+    <p class="lead">A modern formatting library</p>
+    <div class="btn-group" role="group">
+      {% set name = 'fmt' if version.split('.')[0]|int >= 3 else 'cppformat' %}
+      <a class="btn btn-success"
+         href="{{download_url}}/{{version}}/{{name}}-{{version}}.zip">
+           <span class="glyphicon glyphicon-download"></span> Download
+      </a>
+      <button type="button" class="btn btn-success dropdown-toggle"
+        data-toggle="dropdown"><span class="caret"></span></button>
+      <ul class="dropdown-menu">
+      {% for v in versions.split(',') %}
+      {% set name = 'fmt' if v.split('.')[0]|int >= 3 else 'cppformat' %}
+        <li><a href="{{download_url}}/{{v}}/{{name}}-{{v}}.zip">Version {{v}}
+          </a></li>
+      {% endfor %}
+      </ul>
+    </div>
+  </div>
+</div>
+{% endif %}
+{% endblock %}
+
+{# Disable relbars. #}
+{% block relbar1 %}
+{% endblock %}
+{% block relbar2 %}
+{% endblock %}
+
+{% block content %}
+<div class="tb-container">
+  <div class="row">
+    {# Sidebar is currently disabled.
+    <div class="bs-sidebar">
+      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
+        <div class="sphinxsidebarwrapper">
+          {%- block sidebarlogo %}
+          {%- if logo %}
+            <p class="logo"><a href="{{ pathto(master_doc) }}">
+              <img class="logo" src="{{ pathto('_static/' + logo, 1) }}"
+                   alt="Logo"/>
+            </a></p>
+          {%- endif %}
+          {%- endblock %}
+          {%- for sidebartemplate in sidebars %}
+          {%- include sidebartemplate %}
+          {%- endfor %}
+        </div>
+      </div>
+    </div>
+    #}
+
+    <div class="content">
+      {% block body %} {% endblock %}
+    </div>
+  </div>
+</div>
+{% endblock %}
+
+{% block footer %}
+{{ super() }}
+{# Placed at the end of the document so the pages load faster. #}
+<script src="_static/bootstrap.min.js"></script>
+{% endblock %}
diff --git a/3rdparty/fmt/doc/_templates/search.html b/3rdparty/fmt/doc/_templates/search.html
new file mode 100644
index 00000000..488e0b5d
--- /dev/null
+++ b/3rdparty/fmt/doc/_templates/search.html
@@ -0,0 +1,55 @@
+{#
+    basic/search.html
+    ~~~~~~~~~~~~~~~~~
+
+    Template for the search page.
+
+    :copyright: Copyright 2007-2015 by the Sphinx team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+#}
+{%- extends "layout.html" %}
+{% set title = _('Search') %}
+{% set script_files = script_files + ['_static/searchtools.js'] %}
+{% block extrahead %}
+  <script type="text/javascript">
+    jQuery(function() { Search.loadIndex("{{ pathto('searchindex.js', 1) }}"); });
+  </script>
+  {# this is used when loading the search index using $.ajax fails,
+     such as on Chrome for documents on localhost #}
+  <script type="text/javascript" id="searchindexloader"></script>
+  {{ super() }}
+{% endblock %}
+{% block body %}
+  <h1 id="search-documentation">{{ _('Search') }}</h1>
+  <div id="fallback" class="admonition warning">
+  <script type="text/javascript">$('#fallback').hide();</script>
+  <p>
+    {% trans %}Please activate JavaScript to enable the search
+    functionality.{% endtrans %}
+  </p>
+  </div>
+  <p>
+    {% trans %}From here you can search these documents. Enter your search
+    words into the box below and click "search". Note that the search
+    function will automatically search for all of the words. Pages
+    containing fewer words won't appear in the result list.{% endtrans %}
+  </p>
+  {{ searchform('form-inline', True) }}
+  {% if search_performed %}
+    <h2>{{ _('Search Results') }}</h2>
+    {% if not search_results %}
+      <p>{{ _('Your search did not match any documents. Please make sure that all words are spelled correctly and that you\'ve selected enough categories.') }}</p>
+    {% endif %}
+  {% endif %}
+  <div id="search-results">
+  {% if search_results %}
+    <ul>
+    {% for href, caption, context in search_results %}
+      <li><a href="{{ pathto(item.href) }}">{{ caption }}</a>
+        <div class="context">{{ context|e }}</div>
+      </li>
+    {% endfor %}
+    </ul>
+  {% endif %}
+  </div>
+{% endblock %}
diff --git a/3rdparty/fmt/doc/api.rst b/3rdparty/fmt/doc/api.rst
new file mode 100644
index 00000000..93fb3faf
--- /dev/null
+++ b/3rdparty/fmt/doc/api.rst
@@ -0,0 +1,556 @@
+.. _string-formatting-api:
+
+*************
+API Reference
+*************
+
+The {fmt} library API consists of the following parts:
+
+* :ref:`fmt/core.h <core-api>`: the core API providing main formatting functions
+  for ``char``/UTF-8 with compile-time checks and minimal dependencies
+* :ref:`fmt/format.h <format-api>`: the full format API providing additional
+  formatting functions and locale support
+* :ref:`fmt/ranges.h <ranges-api>`: formatting of ranges and tuples
+* :ref:`fmt/chrono.h <chrono-api>`: date and time formatting
+* :ref:`fmt/compile.h <compile-api>`: format string compilation
+* :ref:`fmt/color.h <color-api>`: terminal color and text style
+* :ref:`fmt/os.h <os-api>`: system APIs
+* :ref:`fmt/ostream.h <ostream-api>`: ``std::ostream`` support
+* :ref:`fmt/printf.h <printf-api>`: ``printf`` formatting
+* :ref:`fmt/xchar.h <xchar-api>`: optional ``wchar_t`` support 
+
+All functions and types provided by the library reside in namespace ``fmt`` and
+macros have prefix ``FMT_``.
+
+.. _core-api:
+
+Core API
+========
+
+``fmt/core.h`` defines the core API which provides main formatting functions for
+``char``/UTF-8 with compile-time checks. It has minimal include dependencies for
+better compile times. This header is only beneficial when using {fmt} as a
+library and not in the header-only mode.
+
+The following functions use :ref:`format string syntax <syntax>`
+similar to that of Python's `str.format
+<https://docs.python.org/3/library/stdtypes.html#str.format>`_.
+They take *fmt* and *args* as arguments.
+
+*fmt* is a format string that contains literal text and replacement fields
+surrounded by braces ``{}``. The fields are replaced with formatted arguments
+in the resulting string. `~fmt::format_string` is a format string which can be
+implicitly constructed from a string literal or a ``constexpr`` string and is
+checked at compile time in C++20. To pass a runtime format string wrap it in
+`fmt::runtime`.
+
+*args* is an argument list representing objects to be formatted.
+
+.. _format:
+
+.. doxygenfunction:: format(format_string<T...> fmt, T&&... args) -> std::string
+.. doxygenfunction:: vformat(string_view fmt, format_args args) -> std::string
+
+.. doxygenfunction:: format_to(OutputIt out, format_string<T...> fmt, T&&... args) -> OutputIt
+.. doxygenfunction:: format_to_n(OutputIt out, size_t n, format_string<T...> fmt, T&&... args) -> format_to_n_result<OutputIt>
+.. doxygenfunction:: formatted_size(format_string<T...> fmt, T&&... args) -> size_t
+
+.. doxygenstruct:: fmt::format_to_n_result
+   :members:
+
+.. _print:
+
+.. doxygenfunction:: fmt::print(format_string<T...> fmt, T&&... args)
+.. doxygenfunction:: fmt::vprint(string_view fmt, format_args args)
+
+.. doxygenfunction:: print(std::FILE *f, format_string<T...> fmt, T&&... args)
+.. doxygenfunction:: vprint(std::FILE *f, string_view fmt, format_args args)
+
+Compile-time Format String Checks
+---------------------------------
+
+Compile-time checks are enabled when using ``FMT_STRING``. They support built-in
+and string types as well as user-defined types with ``constexpr`` ``parse``
+functions in their ``formatter`` specializations.
+Requires C++14 and is a no-op in C++11.
+
+.. doxygendefine:: FMT_STRING
+
+To force the use of compile-time checks, define the preprocessor variable
+``FMT_ENFORCE_COMPILE_STRING``. When set, functions accepting ``FMT_STRING``
+will fail to compile with regular strings. Runtime-checked
+formatting is still possible using ``fmt::vformat``, ``fmt::vprint``, etc.
+
+.. doxygenclass:: fmt::basic_format_string
+   :members:
+
+.. doxygentypedef:: fmt::format_string
+
+.. doxygenfunction:: fmt::runtime(const S&)
+
+Named Arguments
+---------------
+
+.. doxygenfunction:: fmt::arg(const S&, const T&)
+
+Named arguments are not supported in compile-time checks at the moment.
+
+Argument Lists
+--------------
+
+You can create your own formatting function with compile-time checks and small
+binary footprint, for example (https://godbolt.org/z/oba4Mc):
+
+.. code:: c++
+
+    #include <fmt/format.h>
+
+    void vlog(const char* file, int line, fmt::string_view format,
+              fmt::format_args args) {
+      fmt::print("{}: {}: ", file, line);
+      fmt::vprint(format, args);
+    }
+
+    template <typename S, typename... Args>
+    void log(const char* file, int line, const S& format, Args&&... args) {
+      vlog(file, line, format,
+          fmt::make_args_checked<Args...>(format, args...));
+    }
+
+    #define MY_LOG(format, ...) \
+      log(__FILE__, __LINE__, FMT_STRING(format), __VA_ARGS__)
+
+    MY_LOG("invalid squishiness: {}", 42);
+
+Note that ``vlog`` is not parameterized on argument types which improves compile
+times and reduces binary code size compared to a fully parameterized version.
+
+.. doxygenfunction:: fmt::make_args_checked(const S&, const remove_reference_t<Args>&...)
+
+.. doxygenfunction:: fmt::make_format_args(const Args&...)
+
+.. doxygenclass:: fmt::format_arg_store
+   :members:
+
+.. doxygenclass:: fmt::dynamic_format_arg_store
+   :members:
+
+.. doxygenclass:: fmt::basic_format_args
+   :members:
+
+.. doxygentypedef:: fmt::format_args
+
+.. doxygenclass:: fmt::basic_format_arg
+   :members:
+
+.. doxygenclass:: fmt::basic_format_context
+   :members:
+
+.. doxygentypedef:: fmt::format_context
+
+Compatibility
+-------------
+
+.. doxygenclass:: fmt::basic_string_view
+   :members:
+
+.. doxygentypedef:: fmt::string_view
+
+Locale
+------
+
+All formatting is locale-independent by default. Use the ``'L'`` format
+specifier to insert the appropriate number separator characters from the
+locale::
+
+  #include <fmt/core.h>
+  #include <locale>
+
+  std::locale::global(std::locale("en_US.UTF-8"));
+  auto s = fmt::format("{:L}", 1000000);  // s == "1,000,000"
+
+.. _format-api:
+
+Format API
+==========
+
+``fmt/format.h`` defines the full format API providing additional formatting
+functions and locale support.
+
+.. _udt:
+
+Formatting User-defined Types
+-----------------------------
+
+To make a user-defined type formattable, specialize the ``formatter<T>`` struct
+template and implement ``parse`` and ``format`` methods::
+
+  #include <fmt/format.h>
+
+  struct point {
+    double x, y;
+  };
+
+  template <> struct fmt::formatter<point> {
+    // Presentation format: 'f' - fixed, 'e' - exponential.
+    char presentation = 'f';
+
+    // Parses format specifications of the form ['f' | 'e'].
+    constexpr auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
+      // [ctx.begin(), ctx.end()) is a character range that contains a part of
+      // the format string starting from the format specifications to be parsed,
+      // e.g. in
+      //
+      //   fmt::format("{:f} - point of interest", point{1, 2});
+      //
+      // the range will contain "f} - point of interest". The formatter should
+      // parse specifiers until '}' or the end of the range. In this example
+      // the formatter should parse the 'f' specifier and return an iterator
+      // pointing to '}'.
+
+      // Parse the presentation format and store it in the formatter:
+      auto it = ctx.begin(), end = ctx.end();
+      if (it != end && (*it == 'f' || *it == 'e')) presentation = *it++;
+
+      // Check if reached the end of the range:
+      if (it != end && *it != '}') throw format_error("invalid format");
+
+      // Return an iterator past the end of the parsed range:
+      return it;
+    }
+
+    // Formats the point p using the parsed format specification (presentation)
+    // stored in this formatter.
+    template <typename FormatContext>
+    auto format(const point& p, FormatContext& ctx) -> decltype(ctx.out()) {
+      // ctx.out() is an output iterator to write to.
+      return presentation == 'f'
+                ? format_to(ctx.out(), "({:.1f}, {:.1f})", p.x, p.y)
+                : format_to(ctx.out(), "({:.1e}, {:.1e})", p.x, p.y);
+    }
+  };
+
+Then you can pass objects of type ``point`` to any formatting function::
+
+  point p = {1, 2};
+  std::string s = fmt::format("{:f}", p);
+  // s == "(1.0, 2.0)"
+
+You can also reuse existing formatters via inheritance or composition, for
+example::
+
+  enum class color {red, green, blue};
+
+  template <> struct fmt::formatter<color>: formatter<string_view> {
+    // parse is inherited from formatter<string_view>.
+    template <typename FormatContext>
+    auto format(color c, FormatContext& ctx) {
+      string_view name = "unknown";
+      switch (c) {
+      case color::red:   name = "red"; break;
+      case color::green: name = "green"; break;
+      case color::blue:  name = "blue"; break;
+      }
+      return formatter<string_view>::format(name, ctx);
+    }
+  };
+
+Since ``parse`` is inherited from ``formatter<string_view>`` it will recognize
+all string format specifications, for example
+
+.. code-block:: c++
+
+   fmt::format("{:>10}", color::blue)
+
+will return ``"      blue"``.
+
+You can also write a formatter for a hierarchy of classes::
+
+  #include <type_traits>
+  #include <fmt/format.h>
+
+  struct A {
+    virtual ~A() {}
+    virtual std::string name() const { return "A"; }
+  };
+
+  struct B : A {
+    virtual std::string name() const { return "B"; }
+  };
+
+  template <typename T>
+  struct fmt::formatter<T, std::enable_if_t<std::is_base_of<A, T>::value, char>> :
+      fmt::formatter<std::string> {
+    template <typename FormatCtx>
+    auto format(const A& a, FormatCtx& ctx) {
+      return fmt::formatter<std::string>::format(a.name(), ctx);
+    }
+  };
+
+  int main() {
+    B b;
+    A& a = b;
+    fmt::print("{}", a); // prints "B"
+  }
+
+If a type provides both a ``formatter`` specialization and an implicit
+conversion to a formattable type, the specialization takes precedence over the
+conversion.
+
+.. doxygenclass:: fmt::basic_format_parse_context
+   :members:
+
+Literal-based API
+-----------------
+
+The following user-defined literals are defined in ``fmt/format.h``.
+
+.. doxygenfunction:: operator""_format(const char *s, size_t n) -> detail::udl_formatter<char> 
+
+.. doxygenfunction:: operator""_a(const char *s, size_t) -> detail::udl_arg<char>
+
+Utilities
+---------
+
+.. doxygenfunction:: fmt::ptr(T p) -> const void*
+.. doxygenfunction:: fmt::ptr(const std::unique_ptr<T> &p) -> const void*
+.. doxygenfunction:: fmt::ptr(const std::shared_ptr<T> &p) -> const void*
+
+.. doxygenfunction:: fmt::to_string(const T &value) -> std::string
+
+.. doxygenfunction:: fmt::to_string_view(const Char *s) -> basic_string_view<Char>
+
+.. doxygenfunction:: fmt::join(Range &&range, string_view sep) -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>>
+
+.. doxygenfunction:: fmt::join(It begin, Sentinel end, string_view sep) -> join_view<It, Sentinel>
+
+.. doxygenfunction:: fmt::group_digits(T value) -> group_digits_view<T>
+
+.. doxygenclass:: fmt::detail::buffer
+   :members:
+
+.. doxygenclass:: fmt::basic_memory_buffer
+   :protected-members:
+   :members:
+
+System Errors
+-------------
+
+{fmt} does not use ``errno`` to communicate errors to the user, but it may call
+system functions which set ``errno``. Users should not make any assumptions
+about the value of ``errno`` being preserved by library functions.
+
+.. doxygenfunction:: fmt::system_error
+
+.. doxygenfunction:: fmt::format_system_error
+
+Custom Allocators
+-----------------
+
+The {fmt} library supports custom dynamic memory allocators.
+A custom allocator class can be specified as a template argument to
+:class:`fmt::basic_memory_buffer`::
+
+    using custom_memory_buffer = 
+      fmt::basic_memory_buffer<char, fmt::inline_buffer_size, custom_allocator>;
+
+It is also possible to write a formatting function that uses a custom
+allocator::
+
+    using custom_string =
+      std::basic_string<char, std::char_traits<char>, custom_allocator>;
+
+    custom_string vformat(custom_allocator alloc, fmt::string_view format_str,
+                          fmt::format_args args) {
+      auto buf = custom_memory_buffer(alloc);
+      fmt::vformat_to(std::back_inserter(buf), format_str, args);
+      return custom_string(buf.data(), buf.size(), alloc);
+    }
+
+    template <typename ...Args>
+    inline custom_string format(custom_allocator alloc,
+                                fmt::string_view format_str,
+                                const Args& ... args) {
+      return vformat(alloc, format_str, fmt::make_format_args(args...));
+    }
+
+The allocator will be used for the output container only. Formatting functions
+normally don't do any allocations for built-in and string types except for
+non-default floating-point formatting that occasionally falls back on
+``sprintf``.
+
+.. _ranges-api:
+
+Ranges and Tuple Formatting
+===========================
+
+The library also supports convenient formatting of ranges and tuples::
+
+  #include <fmt/ranges.h>
+
+  std::tuple<char, int, float> t{'a', 1, 2.0f};
+  // Prints "('a', 1, 2.0)"
+  fmt::print("{}", t);
+
+
+NOTE: currently, the overload of ``fmt::join`` for iterables exists in the main
+``format.h`` header, but expect this to change in the future.
+
+Using ``fmt::join``, you can separate tuple elements with a custom separator::
+
+  #include <fmt/ranges.h>
+
+  std::tuple<int, char> t = {1, 'a'};
+  // Prints "1, a"
+  fmt::print("{}", fmt::join(t, ", "));
+
+.. _chrono-api:
+
+Date and Time Formatting
+========================
+
+``fmt/chrono.h`` provides formatters for
+
+* `std::chrono::duration <https://en.cppreference.com/w/cpp/chrono/duration>`_
+* `std::chrono::time_point
+  <https://en.cppreference.com/w/cpp/chrono/time_point>`_
+* `std::tm <https://en.cppreference.com/w/cpp/chrono/c/tm>`_
+
+The format syntax is described in :ref:`chrono-specs`.
+
+**Example**::
+
+  #include <fmt/chrono.h>
+
+  int main() {
+    std::time_t t = std::time(nullptr);
+
+    // Prints "The date is 2020-11-07." (with the current date):
+    fmt::print("The date is {:%Y-%m-%d}.", fmt::localtime(t));
+
+    using namespace std::literals::chrono_literals;
+
+    // Prints "Default format: 42s 100ms":
+    fmt::print("Default format: {} {}\n", 42s, 100ms);
+
+    // Prints "strftime-like format: 03:15:30":
+    fmt::print("strftime-like format: {:%H:%M:%S}\n", 3h + 15min + 30s);
+  }
+
+.. doxygenfunction:: localtime(std::time_t time)
+
+.. doxygenfunction:: gmtime(std::time_t time)
+
+.. _compile-api:
+
+Format string compilation
+=========================
+
+``fmt/compile.h`` provides format string compilation support when using
+``FMT_COMPILE``. Format strings are parsed, checked and converted into efficient
+formatting code at compile-time. This supports arguments of built-in and string
+types as well as user-defined types with ``constexpr`` ``parse`` functions in
+their ``formatter`` specializations. Format string compilation can generate more
+binary code compared to the default API and is only recommended in places where
+formatting is a performance bottleneck.
+
+.. doxygendefine:: FMT_COMPILE
+
+.. _color-api:
+
+Terminal color and text style
+=============================
+
+``fmt/color.h`` provides support for terminal color and text style output.
+
+.. doxygenfunction:: print(const text_style &ts, const S &format_str, const Args&... args)
+
+.. doxygenfunction:: fg(detail::color_type)
+
+.. doxygenfunction:: bg(detail::color_type)
+
+.. _os-api:
+
+System APIs
+===========
+
+.. doxygenclass:: fmt::ostream
+   :members:
+
+.. doxygenfunction:: fmt::windows_error
+   :members:
+
+.. _ostream-api:
+
+``std::ostream`` Support
+========================
+
+``fmt/ostream.h`` provides ``std::ostream`` support including formatting of
+user-defined types that have an overloaded insertion operator (``operator<<``)::
+
+  #include <fmt/ostream.h>
+
+  class date {
+    int year_, month_, day_;
+  public:
+    date(int year, int month, int day): year_(year), month_(month), day_(day) {}
+
+    friend std::ostream& operator<<(std::ostream& os, const date& d) {
+      return os << d.year_ << '-' << d.month_ << '-' << d.day_;
+    }
+  };
+
+  std::string s = fmt::format("The date is {}", date(2012, 12, 9));
+  // s == "The date is 2012-12-9"
+
+{fmt} only supports insertion operators that are defined in the same namespaces
+as the types they format and can be found with the argument-dependent lookup.
+
+.. doxygenfunction:: print(std::basic_ostream<Char> &os, const S &format_str, Args&&... args)
+
+.. _printf-api:
+
+``printf`` Formatting
+=====================
+
+The header ``fmt/printf.h`` provides ``printf``-like formatting functionality.
+The following functions use `printf format string syntax
+<https://pubs.opengroup.org/onlinepubs/009695399/functions/fprintf.html>`_ with
+the POSIX extension for positional arguments. Unlike their standard
+counterparts, the ``fmt`` functions are type-safe and throw an exception if an
+argument type doesn't match its format specification.
+
+.. doxygenfunction:: printf(const S &format_str, const T&... args)
+
+.. doxygenfunction:: fprintf(std::FILE *f, const S &fmt, const T&... args) -> int
+
+.. doxygenfunction:: sprintf(const S&, const T&...)
+
+.. _xchar-api:
+
+``wchar_t`` Support
+===================
+
+The optional header ``fmt/xchar.h`` provides support for ``wchar_t`` and exotic
+character types.
+
+.. doxygenstruct:: fmt::is_char
+
+.. doxygentypedef:: fmt::wstring_view
+
+.. doxygentypedef:: fmt::wformat_context
+
+.. doxygenfunction:: fmt::to_wstring(const T &value)
+
+Compatibility with C++20 ``std::format``
+========================================
+
+{fmt} implements nearly all of the `C++20 formatting library
+<https://en.cppreference.com/w/cpp/utility/format>`_ with the following
+differences:
+
+* Names are defined in the ``fmt`` namespace instead of ``std`` to avoid
+  collisions with standard library implementations.
+* Width calculation doesn't use grapheme clusterization. The latter has been
+  implemented in a separate branch but hasn't been integrated yet.
+* Most C++20 chrono types are not supported yet.
diff --git a/3rdparty/fmt/doc/basic-bootstrap/README b/3rdparty/fmt/doc/basic-bootstrap/README
new file mode 100644
index 00000000..ba67700d
--- /dev/null
+++ b/3rdparty/fmt/doc/basic-bootstrap/README
@@ -0,0 +1,2 @@
+Sphinx basic theme with Bootstrap support. Modifications are kept to
+a minimum to simplify integration in case of changes to Sphinx theming.
diff --git a/3rdparty/fmt/doc/basic-bootstrap/layout.html b/3rdparty/fmt/doc/basic-bootstrap/layout.html
new file mode 100644
index 00000000..5519c4b5
--- /dev/null
+++ b/3rdparty/fmt/doc/basic-bootstrap/layout.html
@@ -0,0 +1,208 @@
+{#
+    basic/layout.html
+    ~~~~~~~~~~~~~~~~~
+
+    Master layout template for Sphinx themes.
+
+    :copyright: Copyright 2007-2015 by the Sphinx team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+#}
+{%- block doctype -%}
+<!DOCTYPE html>
+{%- endblock %}
+{%- set reldelim1 = reldelim1 is not defined and ' &raquo;' or reldelim1 %}
+{%- set reldelim2 = reldelim2 is not defined and ' |' or reldelim2 %}
+{%- set render_sidebar = (not embedded) and (not theme_nosidebar|tobool) and
+                         (sidebars != []) %}
+{%- set url_root = pathto('', 1) %}
+{# XXX necessary? #}
+{%- if url_root == '#' %}{% set url_root = '' %}{% endif %}
+{%- if not embedded and docstitle %}
+  {%- set titlesuffix = " &mdash; "|safe + docstitle|e %}
+{%- else %}
+  {%- set titlesuffix = "" %}
+{%- endif %}
+
+{%- macro relbar() %}
+    <div class="related" role="navigation" aria-label="related navigation">
+      <h3>{{ _('Navigation') }}</h3>
+      <ul>
+        {%- for rellink in rellinks %}
+        <li class="right" {% if loop.first %}style="margin-right: 10px"{% endif %}>
+          <a href="{{ pathto(rellink[0]) }}" title="{{ rellink[1]|striptags|e }}"
+             {{ accesskey(rellink[2]) }}>{{ rellink[3] }}</a>
+          {%- if not loop.first %}{{ reldelim2 }}{% endif %}</li>
+        {%- endfor %}
+        {%- block rootrellink %}
+        <li class="nav-item nav-item-0"><a href="{{ pathto(master_doc) }}">{{ shorttitle|e }}</a>{{ reldelim1 }}</li>
+        {%- endblock %}
+        {%- for parent in parents %}
+          <li class="nav-item nav-item-{{ loop.index }}"><a href="{{ parent.link|e }}" {% if loop.last %}{{ accesskey("U") }}{% endif %}>{{ parent.title }}</a>{{ reldelim1 }}</li>
+        {%- endfor %}
+        {%- block relbaritems %} {% endblock %}
+      </ul>
+    </div>
+{%- endmacro %}
+
+{%- macro sidebar() %}
+      {%- if render_sidebar %}
+      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
+        <div class="sphinxsidebarwrapper">
+          {%- block sidebarlogo %}
+          {%- if logo %}
+            <p class="logo"><a href="{{ pathto(master_doc) }}">
+              <img class="logo" src="{{ pathto('_static/' + logo, 1) }}" alt="Logo"/>
+            </a></p>
+          {%- endif %}
+          {%- endblock %}
+          {%- if sidebars != None %}
+            {#- new style sidebar: explicitly include/exclude templates #}
+            {%- for sidebartemplate in sidebars %}
+            {%- include sidebartemplate %}
+            {%- endfor %}
+          {%- else %}
+            {#- old style sidebars: using blocks -- should be deprecated #}
+            {%- block sidebartoc %}
+            {%- include "localtoc.html" %}
+            {%- endblock %}
+            {%- block sidebarrel %}
+            {%- include "relations.html" %}
+            {%- endblock %}
+            {%- block sidebarsourcelink %}
+            {%- include "sourcelink.html" %}
+            {%- endblock %}
+            {%- if customsidebar %}
+            {%- include customsidebar %}
+            {%- endif %}
+            {%- block sidebarsearch %}
+            {%- include "searchbox.html" %}
+            {%- endblock %}
+          {%- endif %}
+        </div>
+      </div>
+      {%- endif %}
+{%- endmacro %}
+
+{%- macro script() %}
+    <script type="text/javascript">
+      var DOCUMENTATION_OPTIONS = {
+        URL_ROOT:    '{{ url_root }}',
+        VERSION:     '{{ release|e }}',
+        COLLAPSE_INDEX: false,
+        FILE_SUFFIX: '{{ '' if no_search_suffix else file_suffix }}',
+        LINK_SUFFIX: '{{ link_suffix }}',
+        SOURCELINK_SUFFIX: '{{ sourcelink_suffix }}',
+        HAS_SOURCE:  {{ has_source|lower }},
+        SOURCELINK_SUFFIX:  '{{ sourcelink_suffix }}'
+      };
+    </script>
+    {%- for scriptfile in script_files %}
+    {{ js_tag(scriptfile) }}
+    {%- endfor %}
+{%- endmacro %}
+
+{%- macro css() %}
+    <link rel="stylesheet" href="{{ pathto('_static/' + style, 1) }}" type="text/css" />
+    <link rel="stylesheet" href="{{ pathto('_static/pygments.css', 1) }}" type="text/css" />
+    {%- for cssfile in css_files %}
+    <link rel="stylesheet" href="{{ pathto(cssfile, 1) }}" type="text/css" />
+    {%- endfor %}
+{%- endmacro %}
+
+<html lang="en">
+  <head>
+    <meta charset="{{ encoding }}">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    {# The above 3 meta tags *must* come first in the head; any other head content
+       must come *after* these tags. #}
+    {{ metatags }}
+    {%- block htmltitle %}
+    <title>{{ title|striptags|e }}{{ titlesuffix }}</title>
+    {%- endblock %}
+    {{ css() }}
+    {%- if not embedded %}
+    {{ script() }}
+    {%- if use_opensearch %}
+    <link rel="search" type="application/opensearchdescription+xml"
+          title="{% trans docstitle=docstitle|e %}Search within {{ docstitle }}{% endtrans %}"
+          href="{{ pathto('_static/opensearch.xml', 1) }}"/>
+    {%- endif %}
+    {%- if favicon %}
+    <link rel="shortcut icon" href="{{ pathto('_static/' + favicon, 1) }}"/>
+    {%- endif %}
+    {%- endif %}
+{%- block linktags %}
+    {%- if hasdoc('about') %}
+    <link rel="author" title="{{ _('About these documents') }}" href="{{ pathto('about') }}" />
+    {%- endif %}
+    {%- if hasdoc('genindex') %}
+    <link rel="index" title="{{ _('Index') }}" href="{{ pathto('genindex') }}" />
+    {%- endif %}
+    {%- if hasdoc('search') %}
+    <link rel="search" title="{{ _('Search') }}" href="{{ pathto('search') }}" />
+    {%- endif %}
+    {%- if hasdoc('copyright') %}
+    <link rel="copyright" title="{{ _('Copyright') }}" href="{{ pathto('copyright') }}" />
+    {%- endif %}
+    {%- if parents %}
+    <link rel="up" title="{{ parents[-1].title|striptags|e }}" href="{{ parents[-1].link|e }}" />
+    {%- endif %}
+    {%- if next %}
+    <link rel="next" title="{{ next.title|striptags|e }}" href="{{ next.link|e }}" />
+    {%- endif %}
+    {%- if prev %}
+    <link rel="prev" title="{{ prev.title|striptags|e }}" href="{{ prev.link|e }}" />
+    {%- endif %}
+{%- endblock %}
+{%- block extrahead %} {% endblock %}
+  </head>
+  <body role="document">
+{%- block header %}{% endblock %}
+
+{%- block relbar1 %}{{ relbar() }}{% endblock %}
+
+{%- block content %}
+  {%- block sidebar1 %} {# possible location for sidebar #} {% endblock %}
+
+    <div class="document">
+  {%- block document %}
+      <div class="documentwrapper">
+      {%- if render_sidebar %}
+        <div class="bodywrapper">
+      {%- endif %}
+          <div class="body" role="main">
+            {% block body %} {% endblock %}
+          </div>
+      {%- if render_sidebar %}
+        </div>
+      {%- endif %}
+      </div>
+  {%- endblock %}
+
+  {%- block sidebar2 %}{{ sidebar() }}{% endblock %}
+      <div class="clearer"></div>
+    </div>
+{%- endblock %}
+
+{%- block relbar2 %}{{ relbar() }}{% endblock %}
+
+{%- block footer %}
+    <div class="footer" role="contentinfo">
+    {%- if show_copyright %}
+      {%- if hasdoc('copyright') %}
+        {% trans path=pathto('copyright'), copyright=copyright|e %}&copy; <a href="{{ path }}">Copyright</a> {{ copyright }}.{% endtrans %}
+      {%- else %}
+        {% trans copyright=copyright|e %}&copy; Copyright {{ copyright }}.{% endtrans %}
+      {%- endif %}
+    {%- endif %}
+    {%- if last_updated %}
+      {% trans last_updated=last_updated|e %}Last updated on {{ last_updated }}.{% endtrans %}
+    {%- endif %}
+    {%- if show_sphinx %}
+      {% trans sphinx_version=sphinx_version|e %}Created using <a href="http://sphinx-doc.org/">Sphinx</a> {{ sphinx_version }}.{% endtrans %}
+    {%- endif %}
+    </div>
+{%- endblock %}
+  </body>
+</html>
diff --git a/3rdparty/fmt/doc/basic-bootstrap/theme.conf b/3rdparty/fmt/doc/basic-bootstrap/theme.conf
new file mode 100644
index 00000000..89e03bbd
--- /dev/null
+++ b/3rdparty/fmt/doc/basic-bootstrap/theme.conf
@@ -0,0 +1,2 @@
+[theme]
+inherit = basic
diff --git a/3rdparty/fmt/doc/bootstrap/alerts.less b/3rdparty/fmt/doc/bootstrap/alerts.less
new file mode 100644
index 00000000..c4199db9
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/alerts.less
@@ -0,0 +1,73 @@
+//
+// Alerts
+// --------------------------------------------------
+
+
+// Base styles
+// -------------------------
+
+.alert {
+  padding: @alert-padding;
+  margin-bottom: @line-height-computed;
+  border: 1px solid transparent;
+  border-radius: @alert-border-radius;
+
+  // Headings for larger alerts
+  h4 {
+    margin-top: 0;
+    // Specified for the h4 to prevent conflicts of changing @headings-color
+    color: inherit;
+  }
+
+  // Provide class for links that match alerts
+  .alert-link {
+    font-weight: @alert-link-font-weight;
+  }
+
+  // Improve alignment and spacing of inner content
+  > p,
+  > ul {
+    margin-bottom: 0;
+  }
+
+  > p + p {
+    margin-top: 5px;
+  }
+}
+
+// Dismissible alerts
+//
+// Expand the right padding and account for the close button's positioning.
+
+.alert-dismissable, // The misspelled .alert-dismissable was deprecated in 3.2.0.
+.alert-dismissible {
+  padding-right: (@alert-padding + 20);
+
+  // Adjust close link position
+  .close {
+    position: relative;
+    top: -2px;
+    right: -21px;
+    color: inherit;
+  }
+}
+
+// Alternate styles
+//
+// Generate contextual modifier classes for colorizing the alert.
+
+.alert-success {
+  .alert-variant(@alert-success-bg; @alert-success-border; @alert-success-text);
+}
+
+.alert-info {
+  .alert-variant(@alert-info-bg; @alert-info-border; @alert-info-text);
+}
+
+.alert-warning {
+  .alert-variant(@alert-warning-bg; @alert-warning-border; @alert-warning-text);
+}
+
+.alert-danger {
+  .alert-variant(@alert-danger-bg; @alert-danger-border; @alert-danger-text);
+}
diff --git a/3rdparty/fmt/doc/bootstrap/badges.less b/3rdparty/fmt/doc/bootstrap/badges.less
new file mode 100644
index 00000000..c70bb939
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/badges.less
@@ -0,0 +1,66 @@
+//
+// Badges
+// --------------------------------------------------
+
+
+// Base class
+.badge {
+  display: inline-block;
+  min-width: 10px;
+  padding: 3px 7px;
+  font-size: @font-size-small;
+  font-weight: @badge-font-weight;
+  color: @badge-color;
+  line-height: @badge-line-height;
+  vertical-align: baseline;
+  white-space: nowrap;
+  text-align: center;
+  background-color: @badge-bg;
+  border-radius: @badge-border-radius;
+
+  // Empty badges collapse automatically (not available in IE8)
+  &:empty {
+    display: none;
+  }
+
+  // Quick fix for badges in buttons
+  .btn & {
+    position: relative;
+    top: -1px;
+  }
+
+  .btn-xs &,
+  .btn-group-xs > .btn & {
+    top: 0;
+    padding: 1px 5px;
+  }
+
+  // Hover state, but only for links
+  a& {
+    &:hover,
+    &:focus {
+      color: @badge-link-hover-color;
+      text-decoration: none;
+      cursor: pointer;
+    }
+  }
+
+  // Account for badges in navs
+  .list-group-item.active > &,
+  .nav-pills > .active > a > & {
+    color: @badge-active-color;
+    background-color: @badge-active-bg;
+  }
+
+  .list-group-item > & {
+    float: right;
+  }
+
+  .list-group-item > & + & {
+    margin-right: 5px;
+  }
+
+  .nav-pills > li > a > & {
+    margin-left: 3px;
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/bootstrap.less b/3rdparty/fmt/doc/bootstrap/bootstrap.less
new file mode 100644
index 00000000..61b77474
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/bootstrap.less
@@ -0,0 +1,50 @@
+// Core variables and mixins
+@import "variables.less";
+@import "mixins.less";
+
+// Reset and dependencies
+@import "normalize.less";
+@import "print.less";
+@import "glyphicons.less";
+
+// Core CSS
+@import "scaffolding.less";
+@import "type.less";
+@import "code.less";
+@import "grid.less";
+@import "tables.less";
+@import "forms.less";
+@import "buttons.less";
+
+// Components
+@import "component-animations.less";
+@import "dropdowns.less";
+@import "button-groups.less";
+@import "input-groups.less";
+@import "navs.less";
+@import "navbar.less";
+@import "breadcrumbs.less";
+@import "pagination.less";
+@import "pager.less";
+@import "labels.less";
+@import "badges.less";
+@import "jumbotron.less";
+@import "thumbnails.less";
+@import "alerts.less";
+@import "progress-bars.less";
+@import "media.less";
+@import "list-group.less";
+@import "panels.less";
+@import "responsive-embed.less";
+@import "wells.less";
+@import "close.less";
+
+// Components w/ JavaScript
+@import "modals.less";
+@import "tooltip.less";
+@import "popovers.less";
+@import "carousel.less";
+
+// Utility classes
+@import "utilities.less";
+@import "responsive-utilities.less";
diff --git a/3rdparty/fmt/doc/bootstrap/breadcrumbs.less b/3rdparty/fmt/doc/bootstrap/breadcrumbs.less
new file mode 100644
index 00000000..cb01d503
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/breadcrumbs.less
@@ -0,0 +1,26 @@
+//
+// Breadcrumbs
+// --------------------------------------------------
+
+
+.breadcrumb {
+  padding: @breadcrumb-padding-vertical @breadcrumb-padding-horizontal;
+  margin-bottom: @line-height-computed;
+  list-style: none;
+  background-color: @breadcrumb-bg;
+  border-radius: @border-radius-base;
+
+  > li {
+    display: inline-block;
+
+    + li:before {
+      content: "@{breadcrumb-separator}\00a0"; // Unicode space added since inline-block means non-collapsing white-space
+      padding: 0 5px;
+      color: @breadcrumb-color;
+    }
+  }
+
+  > .active {
+    color: @breadcrumb-active-color;
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/button-groups.less b/3rdparty/fmt/doc/bootstrap/button-groups.less
new file mode 100644
index 00000000..13c1800d
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/button-groups.less
@@ -0,0 +1,243 @@
+//
+// Button groups
+// --------------------------------------------------
+
+// Make the div behave like a button
+.btn-group,
+.btn-group-vertical {
+  position: relative;
+  display: inline-block;
+  vertical-align: middle; // match .btn alignment given font-size hack above
+  > .btn {
+    position: relative;
+    float: left;
+    // Bring the "active" button to the front
+    &:hover,
+    &:focus,
+    &:active,
+    &.active {
+      z-index: 2;
+    }
+  }
+}
+
+// Prevent double borders when buttons are next to each other
+.btn-group {
+  .btn + .btn,
+  .btn + .btn-group,
+  .btn-group + .btn,
+  .btn-group + .btn-group {
+    margin-left: -1px;
+  }
+}
+
+// Optional: Group multiple button groups together for a toolbar
+.btn-toolbar {
+  margin-left: -5px; // Offset the first child's margin
+  &:extend(.clearfix all);
+
+  .btn-group,
+  .input-group {
+    float: left;
+  }
+  > .btn,
+  > .btn-group,
+  > .input-group {
+    margin-left: 5px;
+  }
+}
+
+.btn-group > .btn:not(:first-child):not(:last-child):not(.dropdown-toggle) {
+  border-radius: 0;
+}
+
+// Set corners individual because sometimes a single button can be in a .btn-group and we need :first-child and :last-child to both match
+.btn-group > .btn:first-child {
+  margin-left: 0;
+  &:not(:last-child):not(.dropdown-toggle) {
+    .border-right-radius(0);
+  }
+}
+// Need .dropdown-toggle since :last-child doesn't apply given a .dropdown-menu immediately after it
+.btn-group > .btn:last-child:not(:first-child),
+.btn-group > .dropdown-toggle:not(:first-child) {
+  .border-left-radius(0);
+}
+
+// Custom edits for including btn-groups within btn-groups (useful for including dropdown buttons within a btn-group)
+.btn-group > .btn-group {
+  float: left;
+}
+.btn-group > .btn-group:not(:first-child):not(:last-child) > .btn {
+  border-radius: 0;
+}
+.btn-group > .btn-group:first-child:not(:last-child) {
+  > .btn:last-child,
+  > .dropdown-toggle {
+    .border-right-radius(0);
+  }
+}
+.btn-group > .btn-group:last-child:not(:first-child) > .btn:first-child {
+  .border-left-radius(0);
+}
+
+// On active and open, don't show outline
+.btn-group .dropdown-toggle:active,
+.btn-group.open .dropdown-toggle {
+  outline: 0;
+}
+
+
+// Sizing
+//
+// Remix the default button sizing classes into new ones for easier manipulation.
+
+.btn-group-xs > .btn { &:extend(.btn-xs); }
+.btn-group-sm > .btn { &:extend(.btn-sm); }
+.btn-group-lg > .btn { &:extend(.btn-lg); }
+
+
+// Split button dropdowns
+// ----------------------
+
+// Give the line between buttons some depth
+.btn-group > .btn + .dropdown-toggle {
+  padding-left: 8px;
+  padding-right: 8px;
+}
+.btn-group > .btn-lg + .dropdown-toggle {
+  padding-left: 12px;
+  padding-right: 12px;
+}
+
+// The clickable button for toggling the menu
+// Remove the gradient and set the same inset shadow as the :active state
+.btn-group.open .dropdown-toggle {
+  .box-shadow(inset 0 3px 5px rgba(0,0,0,.125));
+
+  // Show no shadow for `.btn-link` since it has no other button styles.
+  &.btn-link {
+    .box-shadow(none);
+  }
+}
+
+
+// Reposition the caret
+.btn .caret {
+  margin-left: 0;
+}
+// Carets in other button sizes
+.btn-lg .caret {
+  border-width: @caret-width-large @caret-width-large 0;
+  border-bottom-width: 0;
+}
+// Upside down carets for .dropup
+.dropup .btn-lg .caret {
+  border-width: 0 @caret-width-large @caret-width-large;
+}
+
+
+// Vertical button groups
+// ----------------------
+
+.btn-group-vertical {
+  > .btn,
+  > .btn-group,
+  > .btn-group > .btn {
+    display: block;
+    float: none;
+    width: 100%;
+    max-width: 100%;
+  }
+
+  // Clear floats so dropdown menus can be properly placed
+  > .btn-group {
+    &:extend(.clearfix all);
+    > .btn {
+      float: none;
+    }
+  }
+
+  > .btn + .btn,
+  > .btn + .btn-group,
+  > .btn-group + .btn,
+  > .btn-group + .btn-group {
+    margin-top: -1px;
+    margin-left: 0;
+  }
+}
+
+.btn-group-vertical > .btn {
+  &:not(:first-child):not(:last-child) {
+    border-radius: 0;
+  }
+  &:first-child:not(:last-child) {
+    border-top-right-radius: @border-radius-base;
+    .border-bottom-radius(0);
+  }
+  &:last-child:not(:first-child) {
+    border-bottom-left-radius: @border-radius-base;
+    .border-top-radius(0);
+  }
+}
+.btn-group-vertical > .btn-group:not(:first-child):not(:last-child) > .btn {
+  border-radius: 0;
+}
+.btn-group-vertical > .btn-group:first-child:not(:last-child) {
+  > .btn:last-child,
+  > .dropdown-toggle {
+    .border-bottom-radius(0);
+  }
+}
+.btn-group-vertical > .btn-group:last-child:not(:first-child) > .btn:first-child {
+  .border-top-radius(0);
+}
+
+
+// Justified button groups
+// ----------------------
+
+.btn-group-justified {
+  display: table;
+  width: 100%;
+  table-layout: fixed;
+  border-collapse: separate;
+  > .btn,
+  > .btn-group {
+    float: none;
+    display: table-cell;
+    width: 1%;
+  }
+  > .btn-group .btn {
+    width: 100%;
+  }
+
+  > .btn-group .dropdown-menu {
+    left: auto;
+  }
+}
+
+
+// Checkbox and radio options
+//
+// In order to support the browser's form validation feedback, powered by the
+// `required` attribute, we have to "hide" the inputs via `clip`. We cannot use
+// `display: none;` or `visibility: hidden;` as that also hides the popover.
+// Simply visually hiding the inputs via `opacity` would leave them clickable in
+// certain cases which is prevented by using `clip` and `pointer-events`.
+// This way, we ensure a DOM element is visible to position the popover from.
+//
+// See https://github.com/twbs/bootstrap/pull/12794 and
+// https://github.com/twbs/bootstrap/pull/14559 for more information.
+
+[data-toggle="buttons"] {
+  > .btn,
+  > .btn-group > .btn {
+    input[type="radio"],
+    input[type="checkbox"] {
+      position: absolute;
+      clip: rect(0,0,0,0);
+      pointer-events: none;
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/buttons.less b/3rdparty/fmt/doc/bootstrap/buttons.less
new file mode 100644
index 00000000..5a746049
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/buttons.less
@@ -0,0 +1,160 @@
+//
+// Buttons
+// --------------------------------------------------
+
+
+// Base styles
+// --------------------------------------------------
+
+.btn {
+  display: inline-block;
+  margin-bottom: 0; // For input.btn
+  font-weight: @btn-font-weight;
+  text-align: center;
+  vertical-align: middle;
+  touch-action: manipulation;
+  cursor: pointer;
+  background-image: none; // Reset unusual Firefox-on-Android default style; see https://github.com/necolas/normalize.css/issues/214
+  border: 1px solid transparent;
+  white-space: nowrap;
+  .button-size(@padding-base-vertical; @padding-base-horizontal; @font-size-base; @line-height-base; @border-radius-base);
+  .user-select(none);
+
+  &,
+  &:active,
+  &.active {
+    &:focus,
+    &.focus {
+      .tab-focus();
+    }
+  }
+
+  &:hover,
+  &:focus,
+  &.focus {
+    color: @btn-default-color;
+    text-decoration: none;
+  }
+
+  &:active,
+  &.active {
+    outline: 0;
+    background-image: none;
+    .box-shadow(inset 0 3px 5px rgba(0,0,0,.125));
+  }
+
+  &.disabled,
+  &[disabled],
+  fieldset[disabled] & {
+    cursor: @cursor-disabled;
+    pointer-events: none; // Future-proof disabling of clicks
+    .opacity(.65);
+    .box-shadow(none);
+  }
+}
+
+
+// Alternate buttons
+// --------------------------------------------------
+
+.btn-default {
+  .button-variant(@btn-default-color; @btn-default-bg; @btn-default-border);
+}
+.btn-primary {
+  .button-variant(@btn-primary-color; @btn-primary-bg; @btn-primary-border);
+}
+// Success appears as green
+.btn-success {
+  .button-variant(@btn-success-color; @btn-success-bg; @btn-success-border);
+}
+// Info appears as blue-green
+.btn-info {
+  .button-variant(@btn-info-color; @btn-info-bg; @btn-info-border);
+}
+// Warning appears as orange
+.btn-warning {
+  .button-variant(@btn-warning-color; @btn-warning-bg; @btn-warning-border);
+}
+// Danger and error appear as red
+.btn-danger {
+  .button-variant(@btn-danger-color; @btn-danger-bg; @btn-danger-border);
+}
+
+
+// Link buttons
+// -------------------------
+
+// Make a button look and behave like a link
+.btn-link {
+  color: @link-color;
+  font-weight: normal;
+  border-radius: 0;
+
+  &,
+  &:active,
+  &.active,
+  &[disabled],
+  fieldset[disabled] & {
+    background-color: transparent;
+    .box-shadow(none);
+  }
+  &,
+  &:hover,
+  &:focus,
+  &:active {
+    border-color: transparent;
+  }
+  &:hover,
+  &:focus {
+    color: @link-hover-color;
+    text-decoration: @link-hover-decoration;
+    background-color: transparent;
+  }
+  &[disabled],
+  fieldset[disabled] & {
+    &:hover,
+    &:focus {
+      color: @btn-link-disabled-color;
+      text-decoration: none;
+    }
+  }
+}
+
+
+// Button Sizes
+// --------------------------------------------------
+
+.btn-lg {
+  // line-height: ensure even-numbered height of button next to large input
+  .button-size(@padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @border-radius-large);
+}
+.btn-sm {
+  // line-height: ensure proper height of button next to small input
+  .button-size(@padding-small-vertical; @padding-small-horizontal; @font-size-small; @line-height-small; @border-radius-small);
+}
+.btn-xs {
+  .button-size(@padding-xs-vertical; @padding-xs-horizontal; @font-size-small; @line-height-small; @border-radius-small);
+}
+
+
+// Block button
+// --------------------------------------------------
+
+.btn-block {
+  display: block;
+  width: 100%;
+}
+
+// Vertically space out multiple block buttons
+.btn-block + .btn-block {
+  margin-top: 5px;
+}
+
+// Specificity overrides
+input[type="submit"],
+input[type="reset"],
+input[type="button"] {
+  &.btn-block {
+    width: 100%;
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/carousel.less b/3rdparty/fmt/doc/bootstrap/carousel.less
new file mode 100644
index 00000000..4bbe946d
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/carousel.less
@@ -0,0 +1,269 @@
+//
+// Carousel
+// --------------------------------------------------
+
+
+// Wrapper for the slide container and indicators
+.carousel {
+  position: relative;
+}
+
+.carousel-inner {
+  position: relative;
+  overflow: hidden;
+  width: 100%;
+
+  > .item {
+    display: none;
+    position: relative;
+    .transition(.6s ease-in-out left);
+
+    // Account for jankitude on images
+    > img,
+    > a > img {
+      &:extend(.img-responsive);
+      line-height: 1;
+    }
+
+    // WebKit CSS3 transforms for supported devices
+    @media all and (transform-3d), (-webkit-transform-3d) {
+      .transition-transform(~'0.6s ease-in-out');
+      .backface-visibility(~'hidden');
+      .perspective(1000);
+
+      &.next,
+      &.active.right {
+        .translate3d(100%, 0, 0);
+        left: 0;
+      }
+      &.prev,
+      &.active.left {
+        .translate3d(-100%, 0, 0);
+        left: 0;
+      }
+      &.next.left,
+      &.prev.right,
+      &.active {
+        .translate3d(0, 0, 0);
+        left: 0;
+      }
+    }
+  }
+
+  > .active,
+  > .next,
+  > .prev {
+    display: block;
+  }
+
+  > .active {
+    left: 0;
+  }
+
+  > .next,
+  > .prev {
+    position: absolute;
+    top: 0;
+    width: 100%;
+  }
+
+  > .next {
+    left: 100%;
+  }
+  > .prev {
+    left: -100%;
+  }
+  > .next.left,
+  > .prev.right {
+    left: 0;
+  }
+
+  > .active.left {
+    left: -100%;
+  }
+  > .active.right {
+    left: 100%;
+  }
+
+}
+
+// Left/right controls for nav
+// ---------------------------
+
+.carousel-control {
+  position: absolute;
+  top: 0;
+  left: 0;
+  bottom: 0;
+  width: @carousel-control-width;
+  .opacity(@carousel-control-opacity);
+  font-size: @carousel-control-font-size;
+  color: @carousel-control-color;
+  text-align: center;
+  text-shadow: @carousel-text-shadow;
+  // We can't have this transition here because WebKit cancels the carousel
+  // animation if you trip this while in the middle of another animation.
+
+  // Set gradients for backgrounds
+  &.left {
+    #gradient > .horizontal(@start-color: rgba(0,0,0,.5); @end-color: rgba(0,0,0,.0001));
+  }
+  &.right {
+    left: auto;
+    right: 0;
+    #gradient > .horizontal(@start-color: rgba(0,0,0,.0001); @end-color: rgba(0,0,0,.5));
+  }
+
+  // Hover/focus state
+  &:hover,
+  &:focus {
+    outline: 0;
+    color: @carousel-control-color;
+    text-decoration: none;
+    .opacity(.9);
+  }
+
+  // Toggles
+  .icon-prev,
+  .icon-next,
+  .glyphicon-chevron-left,
+  .glyphicon-chevron-right {
+    position: absolute;
+    top: 50%;
+    z-index: 5;
+    display: inline-block;
+  }
+  .icon-prev,
+  .glyphicon-chevron-left {
+    left: 50%;
+    margin-left: -10px;
+  }
+  .icon-next,
+  .glyphicon-chevron-right {
+    right: 50%;
+    margin-right: -10px;
+  }
+  .icon-prev,
+  .icon-next {
+    width:  20px;
+    height: 20px;
+    margin-top: -10px;
+    line-height: 1;
+    font-family: serif;
+  }
+
+
+  .icon-prev {
+    &:before {
+      content: '\2039';// SINGLE LEFT-POINTING ANGLE QUOTATION MARK (U+2039)
+    }
+  }
+  .icon-next {
+    &:before {
+      content: '\203a';// SINGLE RIGHT-POINTING ANGLE QUOTATION MARK (U+203A)
+    }
+  }
+}
+
+// Optional indicator pips
+//
+// Add an unordered list with the following class and add a list item for each
+// slide your carousel holds.
+
+.carousel-indicators {
+  position: absolute;
+  bottom: 10px;
+  left: 50%;
+  z-index: 15;
+  width: 60%;
+  margin-left: -30%;
+  padding-left: 0;
+  list-style: none;
+  text-align: center;
+
+  li {
+    display: inline-block;
+    width:  10px;
+    height: 10px;
+    margin: 1px;
+    text-indent: -999px;
+    border: 1px solid @carousel-indicator-border-color;
+    border-radius: 10px;
+    cursor: pointer;
+
+    // IE8-9 hack for event handling
+    //
+    // Internet Explorer 8-9 does not support clicks on elements without a set
+    // `background-color`. We cannot use `filter` since that's not viewed as a
+    // background color by the browser. Thus, a hack is needed.
+    // See https://developer.mozilla.org/en-US/docs/Web/Events/click#Internet_Explorer
+    //
+    // For IE8, we set solid black as it doesn't support `rgba()`. For IE9, we
+    // set alpha transparency for the best results possible.
+    background-color: #000 \9; // IE8
+    background-color: rgba(0,0,0,0); // IE9
+  }
+  .active {
+    margin: 0;
+    width:  12px;
+    height: 12px;
+    background-color: @carousel-indicator-active-bg;
+  }
+}
+
+// Optional captions
+// -----------------------------
+// Hidden by default for smaller viewports
+.carousel-caption {
+  position: absolute;
+  left: 15%;
+  right: 15%;
+  bottom: 20px;
+  z-index: 10;
+  padding-top: 20px;
+  padding-bottom: 20px;
+  color: @carousel-caption-color;
+  text-align: center;
+  text-shadow: @carousel-text-shadow;
+  & .btn {
+    text-shadow: none; // No shadow for button elements in carousel-caption
+  }
+}
+
+
+// Scale up controls for tablets and up
+@media screen and (min-width: @screen-sm-min) {
+
+  // Scale up the controls a smidge
+  .carousel-control {
+    .glyphicon-chevron-left,
+    .glyphicon-chevron-right,
+    .icon-prev,
+    .icon-next {
+      width: 30px;
+      height: 30px;
+      margin-top: -15px;
+      font-size: 30px;
+    }
+    .glyphicon-chevron-left,
+    .icon-prev {
+      margin-left: -15px;
+    }
+    .glyphicon-chevron-right,
+    .icon-next {
+      margin-right: -15px;
+    }
+  }
+
+  // Show and left align the captions
+  .carousel-caption {
+    left: 20%;
+    right: 20%;
+    padding-bottom: 30px;
+  }
+
+  // Move up the indicators
+  .carousel-indicators {
+    bottom: 20px;
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/close.less b/3rdparty/fmt/doc/bootstrap/close.less
new file mode 100644
index 00000000..6d5bfe08
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/close.less
@@ -0,0 +1,34 @@
+//
+// Close icons
+// --------------------------------------------------
+
+
+.close {
+  float: right;
+  font-size: (@font-size-base * 1.5);
+  font-weight: @close-font-weight;
+  line-height: 1;
+  color: @close-color;
+  text-shadow: @close-text-shadow;
+  .opacity(.2);
+
+  &:hover,
+  &:focus {
+    color: @close-color;
+    text-decoration: none;
+    cursor: pointer;
+    .opacity(.5);
+  }
+
+  // Additional properties for button version
+  // iOS requires the button element instead of an anchor tag.
+  // If you want the anchor version, it requires `href="#"`.
+  // See https://developer.mozilla.org/en-US/docs/Web/Events/click#Safari_Mobile
+  button& {
+    padding: 0;
+    cursor: pointer;
+    background: transparent;
+    border: 0;
+    -webkit-appearance: none;
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/code.less b/3rdparty/fmt/doc/bootstrap/code.less
new file mode 100644
index 00000000..a08b4d48
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/code.less
@@ -0,0 +1,69 @@
+//
+// Code (inline and block)
+// --------------------------------------------------
+
+
+// Inline and block code styles
+code,
+kbd,
+pre,
+samp {
+  font-family: @font-family-monospace;
+}
+
+// Inline code
+code {
+  padding: 2px 4px;
+  font-size: 90%;
+  color: @code-color;
+  background-color: @code-bg;
+  border-radius: @border-radius-base;
+}
+
+// User input typically entered via keyboard
+kbd {
+  padding: 2px 4px;
+  font-size: 90%;
+  color: @kbd-color;
+  background-color: @kbd-bg;
+  border-radius: @border-radius-small;
+  box-shadow: inset 0 -1px 0 rgba(0,0,0,.25);
+
+  kbd {
+    padding: 0;
+    font-size: 100%;
+    font-weight: bold;
+    box-shadow: none;
+  }
+}
+
+// Blocks of code
+pre {
+  display: block;
+  padding: ((@line-height-computed - 1) / 2);
+  margin: 0 0 (@line-height-computed / 2);
+  font-size: (@font-size-base - 1); // 14px to 13px
+  line-height: @line-height-base;
+  word-break: break-all;
+  word-wrap: break-word;
+  color: @pre-color;
+  background-color: @pre-bg;
+  border: 1px solid @pre-border-color;
+  border-radius: @border-radius-base;
+
+  // Account for some code outputs that place code tags in pre tags
+  code {
+    padding: 0;
+    font-size: inherit;
+    color: inherit;
+    white-space: pre-wrap;
+    background-color: transparent;
+    border-radius: 0;
+  }
+}
+
+// Enable scrollable blocks of code
+.pre-scrollable {
+  max-height: @pre-scrollable-max-height;
+  overflow-y: scroll;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/component-animations.less b/3rdparty/fmt/doc/bootstrap/component-animations.less
new file mode 100644
index 00000000..0bcee910
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/component-animations.less
@@ -0,0 +1,33 @@
+//
+// Component animations
+// --------------------------------------------------
+
+// Heads up!
+//
+// We don't use the `.opacity()` mixin here since it causes a bug with text
+// fields in IE7-8. Source: https://github.com/twbs/bootstrap/pull/3552.
+
+.fade {
+  opacity: 0;
+  .transition(opacity .15s linear);
+  &.in {
+    opacity: 1;
+  }
+}
+
+.collapse {
+  display: none;
+
+  &.in      { display: block; }
+  tr&.in    { display: table-row; }
+  tbody&.in { display: table-row-group; }
+}
+
+.collapsing {
+  position: relative;
+  height: 0;
+  overflow: hidden;
+  .transition-property(~"height, visibility");
+  .transition-duration(.35s);
+  .transition-timing-function(ease);
+}
diff --git a/3rdparty/fmt/doc/bootstrap/dropdowns.less b/3rdparty/fmt/doc/bootstrap/dropdowns.less
new file mode 100644
index 00000000..af344607
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/dropdowns.less
@@ -0,0 +1,214 @@
+//
+// Dropdown menus
+// --------------------------------------------------
+
+
+// Dropdown arrow/caret
+.caret {
+  display: inline-block;
+  width: 0;
+  height: 0;
+  margin-left: 2px;
+  vertical-align: middle;
+  border-top:   @caret-width-base dashed;
+  border-right: @caret-width-base solid transparent;
+  border-left:  @caret-width-base solid transparent;
+}
+
+// The dropdown wrapper (div)
+.dropup,
+.dropdown {
+  position: relative;
+}
+
+// Prevent the focus on the dropdown toggle when closing dropdowns
+.dropdown-toggle:focus {
+  outline: 0;
+}
+
+// The dropdown menu (ul)
+.dropdown-menu {
+  position: absolute;
+  top: 100%;
+  left: 0;
+  z-index: @zindex-dropdown;
+  display: none; // none by default, but block on "open" of the menu
+  float: left;
+  min-width: 160px;
+  padding: 5px 0;
+  margin: 2px 0 0; // override default ul
+  list-style: none;
+  font-size: @font-size-base;
+  text-align: left; // Ensures proper alignment if parent has it changed (e.g., modal footer)
+  background-color: @dropdown-bg;
+  border: 1px solid @dropdown-fallback-border; // IE8 fallback
+  border: 1px solid @dropdown-border;
+  border-radius: @border-radius-base;
+  .box-shadow(0 6px 12px rgba(0,0,0,.175));
+  background-clip: padding-box;
+
+  // Aligns the dropdown menu to right
+  //
+  // Deprecated as of 3.1.0 in favor of `.dropdown-menu-[dir]`
+  &.pull-right {
+    right: 0;
+    left: auto;
+  }
+
+  // Dividers (basically an hr) within the dropdown
+  .divider {
+    .nav-divider(@dropdown-divider-bg);
+  }
+
+  // Links within the dropdown menu
+  > li > a {
+    display: block;
+    padding: 3px 20px;
+    clear: both;
+    font-weight: normal;
+    line-height: @line-height-base;
+    color: @dropdown-link-color;
+    white-space: nowrap; // prevent links from randomly breaking onto new lines
+  }
+}
+
+// Hover/Focus state
+.dropdown-menu > li > a {
+  &:hover,
+  &:focus {
+    text-decoration: none;
+    color: @dropdown-link-hover-color;
+    background-color: @dropdown-link-hover-bg;
+  }
+}
+
+// Active state
+.dropdown-menu > .active > a {
+  &,
+  &:hover,
+  &:focus {
+    color: @dropdown-link-active-color;
+    text-decoration: none;
+    outline: 0;
+    background-color: @dropdown-link-active-bg;
+  }
+}
+
+// Disabled state
+//
+// Gray out text and ensure the hover/focus state remains gray
+
+.dropdown-menu > .disabled > a {
+  &,
+  &:hover,
+  &:focus {
+    color: @dropdown-link-disabled-color;
+  }
+
+  // Nuke hover/focus effects
+  &:hover,
+  &:focus {
+    text-decoration: none;
+    background-color: transparent;
+    background-image: none; // Remove CSS gradient
+    .reset-filter();
+    cursor: @cursor-disabled;
+  }
+}
+
+// Open state for the dropdown
+.open {
+  // Show the menu
+  > .dropdown-menu {
+    display: block;
+  }
+
+  // Remove the outline when :focus is triggered
+  > a {
+    outline: 0;
+  }
+}
+
+// Menu positioning
+//
+// Add extra class to `.dropdown-menu` to flip the alignment of the dropdown
+// menu with the parent.
+.dropdown-menu-right {
+  left: auto; // Reset the default from `.dropdown-menu`
+  right: 0;
+}
+// With v3, we enabled auto-flipping if you have a dropdown within a right
+// aligned nav component. To enable the undoing of that, we provide an override
+// to restore the default dropdown menu alignment.
+//
+// This is only for left-aligning a dropdown menu within a `.navbar-right` or
+// `.pull-right` nav component.
+.dropdown-menu-left {
+  left: 0;
+  right: auto;
+}
+
+// Dropdown section headers
+.dropdown-header {
+  display: block;
+  padding: 3px 20px;
+  font-size: @font-size-small;
+  line-height: @line-height-base;
+  color: @dropdown-header-color;
+  white-space: nowrap; // as with > li > a
+}
+
+// Backdrop to catch body clicks on mobile, etc.
+.dropdown-backdrop {
+  position: fixed;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  top: 0;
+  z-index: (@zindex-dropdown - 10);
+}
+
+// Right aligned dropdowns
+.pull-right > .dropdown-menu {
+  right: 0;
+  left: auto;
+}
+
+// Allow for dropdowns to go bottom up (aka, dropup-menu)
+//
+// Just add .dropup after the standard .dropdown class and you're set, bro.
+// TODO: abstract this so that the navbar fixed styles are not placed here?
+
+.dropup,
+.navbar-fixed-bottom .dropdown {
+  // Reverse the caret
+  .caret {
+    border-top: 0;
+    border-bottom: @caret-width-base solid;
+    content: "";
+  }
+  // Different positioning for bottom up menu
+  .dropdown-menu {
+    top: auto;
+    bottom: 100%;
+    margin-bottom: 2px;
+  }
+}
+
+
+// Component alignment
+//
+// Reiterate per navbar.less and the modified component alignment there.
+
+@media (min-width: @grid-float-breakpoint) {
+  .navbar-right {
+    .dropdown-menu {
+      .dropdown-menu-right();
+    }
+    // Necessary for overrides of the default right aligned menu.
+    // Will remove come v4 in all likelihood.
+    .dropdown-menu-left {
+      .dropdown-menu-left();
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/forms.less b/3rdparty/fmt/doc/bootstrap/forms.less
new file mode 100644
index 00000000..e4b50629
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/forms.less
@@ -0,0 +1,574 @@
+//
+// Forms
+// --------------------------------------------------
+
+
+// Normalize non-controls
+//
+// Restyle and baseline non-control form elements.
+
+fieldset {
+  padding: 0;
+  margin: 0;
+  border: 0;
+  // Chrome and Firefox set a `min-width: min-content;` on fieldsets,
+  // so we reset that to ensure it behaves more like a standard block element.
+  // See https://github.com/twbs/bootstrap/issues/12359.
+  min-width: 0;
+}
+
+legend {
+  display: block;
+  width: 100%;
+  padding: 0;
+  margin-bottom: @line-height-computed;
+  font-size: (@font-size-base * 1.5);
+  line-height: inherit;
+  color: @legend-color;
+  border: 0;
+  border-bottom: 1px solid @legend-border-color;
+}
+
+label {
+  display: inline-block;
+  max-width: 100%; // Force IE8 to wrap long content (see https://github.com/twbs/bootstrap/issues/13141)
+  margin-bottom: 5px;
+  font-weight: bold;
+}
+
+
+// Normalize form controls
+//
+// While most of our form styles require extra classes, some basic normalization
+// is required to ensure optimum display with or without those classes to better
+// address browser inconsistencies.
+
+// Override content-box in Normalize (* isn't specific enough)
+input[type="search"] {
+  .box-sizing(border-box);
+}
+
+// Position radios and checkboxes better
+input[type="radio"],
+input[type="checkbox"] {
+  margin: 4px 0 0;
+  margin-top: 1px \9; // IE8-9
+  line-height: normal;
+}
+
+// Set the height of file controls to match text inputs
+input[type="file"] {
+  display: block;
+}
+
+// Make range inputs behave like textual form controls
+input[type="range"] {
+  display: block;
+  width: 100%;
+}
+
+// Make multiple select elements height not fixed
+select[multiple],
+select[size] {
+  height: auto;
+}
+
+// Focus for file, radio, and checkbox
+input[type="file"]:focus,
+input[type="radio"]:focus,
+input[type="checkbox"]:focus {
+  .tab-focus();
+}
+
+// Adjust output element
+output {
+  display: block;
+  padding-top: (@padding-base-vertical + 1);
+  font-size: @font-size-base;
+  line-height: @line-height-base;
+  color: @input-color;
+}
+
+
+// Common form controls
+//
+// Shared size and type resets for form controls. Apply `.form-control` to any
+// of the following form controls:
+//
+// select
+// textarea
+// input[type="text"]
+// input[type="password"]
+// input[type="datetime"]
+// input[type="datetime-local"]
+// input[type="date"]
+// input[type="month"]
+// input[type="time"]
+// input[type="week"]
+// input[type="number"]
+// input[type="email"]
+// input[type="url"]
+// input[type="search"]
+// input[type="tel"]
+// input[type="color"]
+
+.form-control {
+  display: block;
+  width: 100%;
+  height: @input-height-base; // Make inputs at least the height of their button counterpart (base line-height + padding + border)
+  padding: @padding-base-vertical @padding-base-horizontal;
+  font-size: @font-size-base;
+  line-height: @line-height-base;
+  color: @input-color;
+  background-color: @input-bg;
+  background-image: none; // Reset unusual Firefox-on-Android default style; see https://github.com/necolas/normalize.css/issues/214
+  border: 1px solid @input-border;
+  border-radius: @input-border-radius; // Note: This has no effect on <select>s in some browsers, due to the limited stylability of <select>s in CSS.
+  .box-shadow(inset 0 1px 1px rgba(0,0,0,.075));
+  .transition(~"border-color ease-in-out .15s, box-shadow ease-in-out .15s");
+
+  // Customize the `:focus` state to imitate native WebKit styles.
+  .form-control-focus();
+
+  // Placeholder
+  .placeholder();
+
+  // Disabled and read-only inputs
+  //
+  // HTML5 says that controls under a fieldset > legend:first-child won't be
+  // disabled if the fieldset is disabled. Due to implementation difficulty, we
+  // don't honor that edge case; we style them as disabled anyway.
+  &[disabled],
+  &[readonly],
+  fieldset[disabled] & {
+    background-color: @input-bg-disabled;
+    opacity: 1; // iOS fix for unreadable disabled content; see https://github.com/twbs/bootstrap/issues/11655
+  }
+
+  &[disabled],
+  fieldset[disabled] & {
+    cursor: @cursor-disabled;
+  }
+
+  // Reset height for `textarea`s
+  textarea& {
+    height: auto;
+  }
+}
+
+
+// Search inputs in iOS
+//
+// This overrides the extra rounded corners on search inputs in iOS so that our
+// `.form-control` class can properly style them. Note that this cannot simply
+// be added to `.form-control` as it's not specific enough. For details, see
+// https://github.com/twbs/bootstrap/issues/11586.
+
+input[type="search"] {
+  -webkit-appearance: none;
+}
+
+
+// Special styles for iOS temporal inputs
+//
+// In Mobile Safari, setting `display: block` on temporal inputs causes the
+// text within the input to become vertically misaligned. As a workaround, we
+// set a pixel line-height that matches the given height of the input, but only
+// for Safari. See https://bugs.webkit.org/show_bug.cgi?id=139848
+
+@media screen and (-webkit-min-device-pixel-ratio: 0) {
+  input[type="date"],
+  input[type="time"],
+  input[type="datetime-local"],
+  input[type="month"] {
+    line-height: @input-height-base;
+
+    &.input-sm,
+    .input-group-sm & {
+      line-height: @input-height-small;
+    }
+
+    &.input-lg,
+    .input-group-lg & {
+      line-height: @input-height-large;
+    }
+  }
+}
+
+
+// Form groups
+//
+// Designed to help with the organization and spacing of vertical forms. For
+// horizontal forms, use the predefined grid classes.
+
+.form-group {
+  margin-bottom: @form-group-margin-bottom;
+}
+
+
+// Checkboxes and radios
+//
+// Indent the labels to position radios/checkboxes as hanging controls.
+
+.radio,
+.checkbox {
+  position: relative;
+  display: block;
+  margin-top: 10px;
+  margin-bottom: 10px;
+
+  label {
+    min-height: @line-height-computed; // Ensure the input doesn't jump when there is no text
+    padding-left: 20px;
+    margin-bottom: 0;
+    font-weight: normal;
+    cursor: pointer;
+  }
+}
+.radio input[type="radio"],
+.radio-inline input[type="radio"],
+.checkbox input[type="checkbox"],
+.checkbox-inline input[type="checkbox"] {
+  position: absolute;
+  margin-left: -20px;
+  margin-top: 4px \9;
+}
+
+.radio + .radio,
+.checkbox + .checkbox {
+  margin-top: -5px; // Move up sibling radios or checkboxes for tighter spacing
+}
+
+// Radios and checkboxes on same line
+.radio-inline,
+.checkbox-inline {
+  position: relative;
+  display: inline-block;
+  padding-left: 20px;
+  margin-bottom: 0;
+  vertical-align: middle;
+  font-weight: normal;
+  cursor: pointer;
+}
+.radio-inline + .radio-inline,
+.checkbox-inline + .checkbox-inline {
+  margin-top: 0;
+  margin-left: 10px; // space out consecutive inline controls
+}
+
+// Apply same disabled cursor tweak as for inputs
+// Some special care is needed because <label>s don't inherit their parent's `cursor`.
+//
+// Note: Neither radios nor checkboxes can be readonly.
+input[type="radio"],
+input[type="checkbox"] {
+  &[disabled],
+  &.disabled,
+  fieldset[disabled] & {
+    cursor: @cursor-disabled;
+  }
+}
+// These classes are used directly on <label>s
+.radio-inline,
+.checkbox-inline {
+  &.disabled,
+  fieldset[disabled] & {
+    cursor: @cursor-disabled;
+  }
+}
+// These classes are used on elements with <label> descendants
+.radio,
+.checkbox {
+  &.disabled,
+  fieldset[disabled] & {
+    label {
+      cursor: @cursor-disabled;
+    }
+  }
+}
+
+
+// Static form control text
+//
+// Apply class to a `p` element to make any string of text align with labels in
+// a horizontal form layout.
+
+.form-control-static {
+  // Size it appropriately next to real form controls
+  padding-top: (@padding-base-vertical + 1);
+  padding-bottom: (@padding-base-vertical + 1);
+  // Remove default margin from `p`
+  margin-bottom: 0;
+  min-height: (@line-height-computed + @font-size-base);
+
+  &.input-lg,
+  &.input-sm {
+    padding-left: 0;
+    padding-right: 0;
+  }
+}
+
+
+// Form control sizing
+//
+// Build on `.form-control` with modifier classes to decrease or increase the
+// height and font-size of form controls.
+//
+// The `.form-group-* form-control` variations are sadly duplicated to avoid the
+// issue documented in https://github.com/twbs/bootstrap/issues/15074.
+
+.input-sm {
+  .input-size(@input-height-small; @padding-small-vertical; @padding-small-horizontal; @font-size-small; @line-height-small; @input-border-radius-small);
+}
+.form-group-sm {
+  .form-control {
+    .input-size(@input-height-small; @padding-small-vertical; @padding-small-horizontal; @font-size-small; @line-height-small; @input-border-radius-small);
+  }
+  .form-control-static {
+    height: @input-height-small;
+    padding: @padding-small-vertical @padding-small-horizontal;
+    font-size: @font-size-small;
+    line-height: @line-height-small;
+    min-height: (@line-height-computed + @font-size-small);
+  }
+}
+
+.input-lg {
+  .input-size(@input-height-large; @padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @input-border-radius-large);
+}
+.form-group-lg {
+  .form-control {
+    .input-size(@input-height-large; @padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @input-border-radius-large);
+  }
+  .form-control-static {
+    height: @input-height-large;
+    padding: @padding-large-vertical @padding-large-horizontal;
+    font-size: @font-size-large;
+    line-height: @line-height-large;
+    min-height: (@line-height-computed + @font-size-large);
+  }
+}
+
+
+// Form control feedback states
+//
+// Apply contextual and semantic states to individual form controls.
+
+.has-feedback {
+  // Enable absolute positioning
+  position: relative;
+
+  // Ensure icons don't overlap text
+  .form-control {
+    padding-right: (@input-height-base * 1.25);
+  }
+}
+// Feedback icon (requires .glyphicon classes)
+.form-control-feedback {
+  position: absolute;
+  top: 0;
+  right: 0;
+  z-index: 2; // Ensure icon is above input groups
+  display: block;
+  width: @input-height-base;
+  height: @input-height-base;
+  line-height: @input-height-base;
+  text-align: center;
+  pointer-events: none;
+}
+.input-lg + .form-control-feedback {
+  width: @input-height-large;
+  height: @input-height-large;
+  line-height: @input-height-large;
+}
+.input-sm + .form-control-feedback {
+  width: @input-height-small;
+  height: @input-height-small;
+  line-height: @input-height-small;
+}
+
+// Feedback states
+.has-success {
+  .form-control-validation(@state-success-text; @state-success-text; @state-success-bg);
+}
+.has-warning {
+  .form-control-validation(@state-warning-text; @state-warning-text; @state-warning-bg);
+}
+.has-error {
+  .form-control-validation(@state-danger-text; @state-danger-text; @state-danger-bg);
+}
+
+// Reposition feedback icon if input has visible label above
+.has-feedback label {
+
+  & ~ .form-control-feedback {
+     top: (@line-height-computed + 5); // Height of the `label` and its margin
+  }
+  &.sr-only ~ .form-control-feedback {
+     top: 0;
+  }
+}
+
+
+// Help text
+//
+// Apply to any element you wish to create light text for placement immediately
+// below a form control. Use for general help, formatting, or instructional text.
+
+.help-block {
+  display: block; // account for any element using help-block
+  margin-top: 5px;
+  margin-bottom: 10px;
+  color: lighten(@text-color, 25%); // lighten the text some for contrast
+}
+
+
+// Inline forms
+//
+// Make forms appear inline(-block) by adding the `.form-inline` class. Inline
+// forms begin stacked on extra small (mobile) devices and then go inline when
+// viewports reach <768px.
+//
+// Requires wrapping inputs and labels with `.form-group` for proper display of
+// default HTML form controls and our custom form controls (e.g., input groups).
+//
+// Heads up! This is mixin-ed into `.navbar-form` in navbars.less.
+
+.form-inline {
+
+  // Kick in the inline
+  @media (min-width: @screen-sm-min) {
+    // Inline-block all the things for "inline"
+    .form-group {
+      display: inline-block;
+      margin-bottom: 0;
+      vertical-align: middle;
+    }
+
+    // In navbar-form, allow folks to *not* use `.form-group`
+    .form-control {
+      display: inline-block;
+      width: auto; // Prevent labels from stacking above inputs in `.form-group`
+      vertical-align: middle;
+    }
+
+    // Make static controls behave like regular ones
+    .form-control-static {
+      display: inline-block;
+    }
+
+    .input-group {
+      display: inline-table;
+      vertical-align: middle;
+
+      .input-group-addon,
+      .input-group-btn,
+      .form-control {
+        width: auto;
+      }
+    }
+
+    // Input groups need that 100% width though
+    .input-group > .form-control {
+      width: 100%;
+    }
+
+    .control-label {
+      margin-bottom: 0;
+      vertical-align: middle;
+    }
+
+    // Remove default margin on radios/checkboxes that were used for stacking, and
+    // then undo the floating of radios and checkboxes to match.
+    .radio,
+    .checkbox {
+      display: inline-block;
+      margin-top: 0;
+      margin-bottom: 0;
+      vertical-align: middle;
+
+      label {
+        padding-left: 0;
+      }
+    }
+    .radio input[type="radio"],
+    .checkbox input[type="checkbox"] {
+      position: relative;
+      margin-left: 0;
+    }
+
+    // Re-override the feedback icon.
+    .has-feedback .form-control-feedback {
+      top: 0;
+    }
+  }
+}
+
+
+// Horizontal forms
+//
+// Horizontal forms are built on grid classes and allow you to create forms with
+// labels on the left and inputs on the right.
+
+.form-horizontal {
+
+  // Consistent vertical alignment of radios and checkboxes
+  //
+  // Labels also get some reset styles, but that is scoped to a media query below.
+  .radio,
+  .checkbox,
+  .radio-inline,
+  .checkbox-inline {
+    margin-top: 0;
+    margin-bottom: 0;
+    padding-top: (@padding-base-vertical + 1); // Default padding plus a border
+  }
+  // Account for padding we're adding to ensure the alignment and of help text
+  // and other content below items
+  .radio,
+  .checkbox {
+    min-height: (@line-height-computed + (@padding-base-vertical + 1));
+  }
+
+  // Make form groups behave like rows
+  .form-group {
+    .make-row();
+  }
+
+  // Reset spacing and right align labels, but scope to media queries so that
+  // labels on narrow viewports stack the same as a default form example.
+  @media (min-width: @screen-sm-min) {
+    .control-label {
+      text-align: right;
+      margin-bottom: 0;
+      padding-top: (@padding-base-vertical + 1); // Default padding plus a border
+    }
+  }
+
+  // Validation states
+  //
+  // Reposition the icon because it's now within a grid column and columns have
+  // `position: relative;` on them. Also accounts for the grid gutter padding.
+  .has-feedback .form-control-feedback {
+    right: (@grid-gutter-width / 2);
+  }
+
+  // Form group sizes
+  //
+  // Quick utility class for applying `.input-lg` and `.input-sm` styles to the
+  // inputs and labels within a `.form-group`.
+  .form-group-lg {
+    @media (min-width: @screen-sm-min) {
+      .control-label {
+        padding-top: ((@padding-large-vertical * @line-height-large) + 1);
+      }
+    }
+  }
+  .form-group-sm {
+    @media (min-width: @screen-sm-min) {
+      .control-label {
+        padding-top: (@padding-small-vertical + 1);
+      }
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/glyphicons.less b/3rdparty/fmt/doc/bootstrap/glyphicons.less
new file mode 100644
index 00000000..335d80aa
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/glyphicons.less
@@ -0,0 +1,305 @@
+//
+// Glyphicons for Bootstrap
+//
+// Since icons are fonts, they can be placed anywhere text is placed and are
+// thus automatically sized to match the surrounding child. To use, create an
+// inline element with the appropriate classes, like so:
+//
+// <a href="#"><span class="glyphicon glyphicon-star"></span> Star</a>
+
+// Import the fonts
+@font-face {
+  font-family: 'Glyphicons Halflings';
+  src: url('@{icon-font-path}@{icon-font-name}.eot');
+  src: url('@{icon-font-path}@{icon-font-name}.eot?#iefix') format('embedded-opentype'),
+       url('@{icon-font-path}@{icon-font-name}.woff2') format('woff2'),
+       url('@{icon-font-path}@{icon-font-name}.woff') format('woff'),
+       url('@{icon-font-path}@{icon-font-name}.ttf') format('truetype'),
+       url('@{icon-font-path}@{icon-font-name}.svg#@{icon-font-svg-id}') format('svg');
+}
+
+// Catchall baseclass
+.glyphicon {
+  position: relative;
+  top: 1px;
+  display: inline-block;
+  font-family: 'Glyphicons Halflings';
+  font-style: normal;
+  font-weight: normal;
+  line-height: 1;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+// Individual icons
+.glyphicon-asterisk               { &:before { content: "\2a"; } }
+.glyphicon-plus                   { &:before { content: "\2b"; } }
+.glyphicon-euro,
+.glyphicon-eur                    { &:before { content: "\20ac"; } }
+.glyphicon-minus                  { &:before { content: "\2212"; } }
+.glyphicon-cloud                  { &:before { content: "\2601"; } }
+.glyphicon-envelope               { &:before { content: "\2709"; } }
+.glyphicon-pencil                 { &:before { content: "\270f"; } }
+.glyphicon-glass                  { &:before { content: "\e001"; } }
+.glyphicon-music                  { &:before { content: "\e002"; } }
+.glyphicon-search                 { &:before { content: "\e003"; } }
+.glyphicon-heart                  { &:before { content: "\e005"; } }
+.glyphicon-star                   { &:before { content: "\e006"; } }
+.glyphicon-star-empty             { &:before { content: "\e007"; } }
+.glyphicon-user                   { &:before { content: "\e008"; } }
+.glyphicon-film                   { &:before { content: "\e009"; } }
+.glyphicon-th-large               { &:before { content: "\e010"; } }
+.glyphicon-th                     { &:before { content: "\e011"; } }
+.glyphicon-th-list                { &:before { content: "\e012"; } }
+.glyphicon-ok                     { &:before { content: "\e013"; } }
+.glyphicon-remove                 { &:before { content: "\e014"; } }
+.glyphicon-zoom-in                { &:before { content: "\e015"; } }
+.glyphicon-zoom-out               { &:before { content: "\e016"; } }
+.glyphicon-off                    { &:before { content: "\e017"; } }
+.glyphicon-signal                 { &:before { content: "\e018"; } }
+.glyphicon-cog                    { &:before { content: "\e019"; } }
+.glyphicon-trash                  { &:before { content: "\e020"; } }
+.glyphicon-home                   { &:before { content: "\e021"; } }
+.glyphicon-file                   { &:before { content: "\e022"; } }
+.glyphicon-time                   { &:before { content: "\e023"; } }
+.glyphicon-road                   { &:before { content: "\e024"; } }
+.glyphicon-download-alt           { &:before { content: "\e025"; } }
+.glyphicon-download               { &:before { content: "\e026"; } }
+.glyphicon-upload                 { &:before { content: "\e027"; } }
+.glyphicon-inbox                  { &:before { content: "\e028"; } }
+.glyphicon-play-circle            { &:before { content: "\e029"; } }
+.glyphicon-repeat                 { &:before { content: "\e030"; } }
+.glyphicon-refresh                { &:before { content: "\e031"; } }
+.glyphicon-list-alt               { &:before { content: "\e032"; } }
+.glyphicon-lock                   { &:before { content: "\e033"; } }
+.glyphicon-flag                   { &:before { content: "\e034"; } }
+.glyphicon-headphones             { &:before { content: "\e035"; } }
+.glyphicon-volume-off             { &:before { content: "\e036"; } }
+.glyphicon-volume-down            { &:before { content: "\e037"; } }
+.glyphicon-volume-up              { &:before { content: "\e038"; } }
+.glyphicon-qrcode                 { &:before { content: "\e039"; } }
+.glyphicon-barcode                { &:before { content: "\e040"; } }
+.glyphicon-tag                    { &:before { content: "\e041"; } }
+.glyphicon-tags                   { &:before { content: "\e042"; } }
+.glyphicon-book                   { &:before { content: "\e043"; } }
+.glyphicon-bookmark               { &:before { content: "\e044"; } }
+.glyphicon-print                  { &:before { content: "\e045"; } }
+.glyphicon-camera                 { &:before { content: "\e046"; } }
+.glyphicon-font                   { &:before { content: "\e047"; } }
+.glyphicon-bold                   { &:before { content: "\e048"; } }
+.glyphicon-italic                 { &:before { content: "\e049"; } }
+.glyphicon-text-height            { &:before { content: "\e050"; } }
+.glyphicon-text-width             { &:before { content: "\e051"; } }
+.glyphicon-align-left             { &:before { content: "\e052"; } }
+.glyphicon-align-center           { &:before { content: "\e053"; } }
+.glyphicon-align-right            { &:before { content: "\e054"; } }
+.glyphicon-align-justify          { &:before { content: "\e055"; } }
+.glyphicon-list                   { &:before { content: "\e056"; } }
+.glyphicon-indent-left            { &:before { content: "\e057"; } }
+.glyphicon-indent-right           { &:before { content: "\e058"; } }
+.glyphicon-facetime-video         { &:before { content: "\e059"; } }
+.glyphicon-picture                { &:before { content: "\e060"; } }
+.glyphicon-map-marker             { &:before { content: "\e062"; } }
+.glyphicon-adjust                 { &:before { content: "\e063"; } }
+.glyphicon-tint                   { &:before { content: "\e064"; } }
+.glyphicon-edit                   { &:before { content: "\e065"; } }
+.glyphicon-share                  { &:before { content: "\e066"; } }
+.glyphicon-check                  { &:before { content: "\e067"; } }
+.glyphicon-move                   { &:before { content: "\e068"; } }
+.glyphicon-step-backward          { &:before { content: "\e069"; } }
+.glyphicon-fast-backward          { &:before { content: "\e070"; } }
+.glyphicon-backward               { &:before { content: "\e071"; } }
+.glyphicon-play                   { &:before { content: "\e072"; } }
+.glyphicon-pause                  { &:before { content: "\e073"; } }
+.glyphicon-stop                   { &:before { content: "\e074"; } }
+.glyphicon-forward                { &:before { content: "\e075"; } }
+.glyphicon-fast-forward           { &:before { content: "\e076"; } }
+.glyphicon-step-forward           { &:before { content: "\e077"; } }
+.glyphicon-eject                  { &:before { content: "\e078"; } }
+.glyphicon-chevron-left           { &:before { content: "\e079"; } }
+.glyphicon-chevron-right          { &:before { content: "\e080"; } }
+.glyphicon-plus-sign              { &:before { content: "\e081"; } }
+.glyphicon-minus-sign             { &:before { content: "\e082"; } }
+.glyphicon-remove-sign            { &:before { content: "\e083"; } }
+.glyphicon-ok-sign                { &:before { content: "\e084"; } }
+.glyphicon-question-sign          { &:before { content: "\e085"; } }
+.glyphicon-info-sign              { &:before { content: "\e086"; } }
+.glyphicon-screenshot             { &:before { content: "\e087"; } }
+.glyphicon-remove-circle          { &:before { content: "\e088"; } }
+.glyphicon-ok-circle              { &:before { content: "\e089"; } }
+.glyphicon-ban-circle             { &:before { content: "\e090"; } }
+.glyphicon-arrow-left             { &:before { content: "\e091"; } }
+.glyphicon-arrow-right            { &:before { content: "\e092"; } }
+.glyphicon-arrow-up               { &:before { content: "\e093"; } }
+.glyphicon-arrow-down             { &:before { content: "\e094"; } }
+.glyphicon-share-alt              { &:before { content: "\e095"; } }
+.glyphicon-resize-full            { &:before { content: "\e096"; } }
+.glyphicon-resize-small           { &:before { content: "\e097"; } }
+.glyphicon-exclamation-sign       { &:before { content: "\e101"; } }
+.glyphicon-gift                   { &:before { content: "\e102"; } }
+.glyphicon-leaf                   { &:before { content: "\e103"; } }
+.glyphicon-fire                   { &:before { content: "\e104"; } }
+.glyphicon-eye-open               { &:before { content: "\e105"; } }
+.glyphicon-eye-close              { &:before { content: "\e106"; } }
+.glyphicon-warning-sign           { &:before { content: "\e107"; } }
+.glyphicon-plane                  { &:before { content: "\e108"; } }
+.glyphicon-calendar               { &:before { content: "\e109"; } }
+.glyphicon-random                 { &:before { content: "\e110"; } }
+.glyphicon-comment                { &:before { content: "\e111"; } }
+.glyphicon-magnet                 { &:before { content: "\e112"; } }
+.glyphicon-chevron-up             { &:before { content: "\e113"; } }
+.glyphicon-chevron-down           { &:before { content: "\e114"; } }
+.glyphicon-retweet                { &:before { content: "\e115"; } }
+.glyphicon-shopping-cart          { &:before { content: "\e116"; } }
+.glyphicon-folder-close           { &:before { content: "\e117"; } }
+.glyphicon-folder-open            { &:before { content: "\e118"; } }
+.glyphicon-resize-vertical        { &:before { content: "\e119"; } }
+.glyphicon-resize-horizontal      { &:before { content: "\e120"; } }
+.glyphicon-hdd                    { &:before { content: "\e121"; } }
+.glyphicon-bullhorn               { &:before { content: "\e122"; } }
+.glyphicon-bell                   { &:before { content: "\e123"; } }
+.glyphicon-certificate            { &:before { content: "\e124"; } }
+.glyphicon-thumbs-up              { &:before { content: "\e125"; } }
+.glyphicon-thumbs-down            { &:before { content: "\e126"; } }
+.glyphicon-hand-right             { &:before { content: "\e127"; } }
+.glyphicon-hand-left              { &:before { content: "\e128"; } }
+.glyphicon-hand-up                { &:before { content: "\e129"; } }
+.glyphicon-hand-down              { &:before { content: "\e130"; } }
+.glyphicon-circle-arrow-right     { &:before { content: "\e131"; } }
+.glyphicon-circle-arrow-left      { &:before { content: "\e132"; } }
+.glyphicon-circle-arrow-up        { &:before { content: "\e133"; } }
+.glyphicon-circle-arrow-down      { &:before { content: "\e134"; } }
+.glyphicon-globe                  { &:before { content: "\e135"; } }
+.glyphicon-wrench                 { &:before { content: "\e136"; } }
+.glyphicon-tasks                  { &:before { content: "\e137"; } }
+.glyphicon-filter                 { &:before { content: "\e138"; } }
+.glyphicon-briefcase              { &:before { content: "\e139"; } }
+.glyphicon-fullscreen             { &:before { content: "\e140"; } }
+.glyphicon-dashboard              { &:before { content: "\e141"; } }
+.glyphicon-paperclip              { &:before { content: "\e142"; } }
+.glyphicon-heart-empty            { &:before { content: "\e143"; } }
+.glyphicon-link                   { &:before { content: "\e144"; } }
+.glyphicon-phone                  { &:before { content: "\e145"; } }
+.glyphicon-pushpin                { &:before { content: "\e146"; } }
+.glyphicon-usd                    { &:before { content: "\e148"; } }
+.glyphicon-gbp                    { &:before { content: "\e149"; } }
+.glyphicon-sort                   { &:before { content: "\e150"; } }
+.glyphicon-sort-by-alphabet       { &:before { content: "\e151"; } }
+.glyphicon-sort-by-alphabet-alt   { &:before { content: "\e152"; } }
+.glyphicon-sort-by-order          { &:before { content: "\e153"; } }
+.glyphicon-sort-by-order-alt      { &:before { content: "\e154"; } }
+.glyphicon-sort-by-attributes     { &:before { content: "\e155"; } }
+.glyphicon-sort-by-attributes-alt { &:before { content: "\e156"; } }
+.glyphicon-unchecked              { &:before { content: "\e157"; } }
+.glyphicon-expand                 { &:before { content: "\e158"; } }
+.glyphicon-collapse-down          { &:before { content: "\e159"; } }
+.glyphicon-collapse-up            { &:before { content: "\e160"; } }
+.glyphicon-log-in                 { &:before { content: "\e161"; } }
+.glyphicon-flash                  { &:before { content: "\e162"; } }
+.glyphicon-log-out                { &:before { content: "\e163"; } }
+.glyphicon-new-window             { &:before { content: "\e164"; } }
+.glyphicon-record                 { &:before { content: "\e165"; } }
+.glyphicon-save                   { &:before { content: "\e166"; } }
+.glyphicon-open                   { &:before { content: "\e167"; } }
+.glyphicon-saved                  { &:before { content: "\e168"; } }
+.glyphicon-import                 { &:before { content: "\e169"; } }
+.glyphicon-export                 { &:before { content: "\e170"; } }
+.glyphicon-send                   { &:before { content: "\e171"; } }
+.glyphicon-floppy-disk            { &:before { content: "\e172"; } }
+.glyphicon-floppy-saved           { &:before { content: "\e173"; } }
+.glyphicon-floppy-remove          { &:before { content: "\e174"; } }
+.glyphicon-floppy-save            { &:before { content: "\e175"; } }
+.glyphicon-floppy-open            { &:before { content: "\e176"; } }
+.glyphicon-credit-card            { &:before { content: "\e177"; } }
+.glyphicon-transfer               { &:before { content: "\e178"; } }
+.glyphicon-cutlery                { &:before { content: "\e179"; } }
+.glyphicon-header                 { &:before { content: "\e180"; } }
+.glyphicon-compressed             { &:before { content: "\e181"; } }
+.glyphicon-earphone               { &:before { content: "\e182"; } }
+.glyphicon-phone-alt              { &:before { content: "\e183"; } }
+.glyphicon-tower                  { &:before { content: "\e184"; } }
+.glyphicon-stats                  { &:before { content: "\e185"; } }
+.glyphicon-sd-video               { &:before { content: "\e186"; } }
+.glyphicon-hd-video               { &:before { content: "\e187"; } }
+.glyphicon-subtitles              { &:before { content: "\e188"; } }
+.glyphicon-sound-stereo           { &:before { content: "\e189"; } }
+.glyphicon-sound-dolby            { &:before { content: "\e190"; } }
+.glyphicon-sound-5-1              { &:before { content: "\e191"; } }
+.glyphicon-sound-6-1              { &:before { content: "\e192"; } }
+.glyphicon-sound-7-1              { &:before { content: "\e193"; } }
+.glyphicon-copyright-mark         { &:before { content: "\e194"; } }
+.glyphicon-registration-mark      { &:before { content: "\e195"; } }
+.glyphicon-cloud-download         { &:before { content: "\e197"; } }
+.glyphicon-cloud-upload           { &:before { content: "\e198"; } }
+.glyphicon-tree-conifer           { &:before { content: "\e199"; } }
+.glyphicon-tree-deciduous         { &:before { content: "\e200"; } }
+.glyphicon-cd                     { &:before { content: "\e201"; } }
+.glyphicon-save-file              { &:before { content: "\e202"; } }
+.glyphicon-open-file              { &:before { content: "\e203"; } }
+.glyphicon-level-up               { &:before { content: "\e204"; } }
+.glyphicon-copy                   { &:before { content: "\e205"; } }
+.glyphicon-paste                  { &:before { content: "\e206"; } }
+// The following 2 Glyphicons are omitted for the time being because
+// they currently use Unicode codepoints that are outside the
+// Basic Multilingual Plane (BMP). Older buggy versions of WebKit can't handle
+// non-BMP codepoints in CSS string escapes, and thus can't display these two icons.
+// Notably, the bug affects some older versions of the Android Browser.
+// More info: https://github.com/twbs/bootstrap/issues/10106
+// .glyphicon-door                   { &:before { content: "\1f6aa"; } }
+// .glyphicon-key                    { &:before { content: "\1f511"; } }
+.glyphicon-alert                  { &:before { content: "\e209"; } }
+.glyphicon-equalizer              { &:before { content: "\e210"; } }
+.glyphicon-king                   { &:before { content: "\e211"; } }
+.glyphicon-queen                  { &:before { content: "\e212"; } }
+.glyphicon-pawn                   { &:before { content: "\e213"; } }
+.glyphicon-bishop                 { &:before { content: "\e214"; } }
+.glyphicon-knight                 { &:before { content: "\e215"; } }
+.glyphicon-baby-formula           { &:before { content: "\e216"; } }
+.glyphicon-tent                   { &:before { content: "\26fa"; } }
+.glyphicon-blackboard             { &:before { content: "\e218"; } }
+.glyphicon-bed                    { &:before { content: "\e219"; } }
+.glyphicon-apple                  { &:before { content: "\f8ff"; } }
+.glyphicon-erase                  { &:before { content: "\e221"; } }
+.glyphicon-hourglass              { &:before { content: "\231b"; } }
+.glyphicon-lamp                   { &:before { content: "\e223"; } }
+.glyphicon-duplicate              { &:before { content: "\e224"; } }
+.glyphicon-piggy-bank             { &:before { content: "\e225"; } }
+.glyphicon-scissors               { &:before { content: "\e226"; } }
+.glyphicon-bitcoin                { &:before { content: "\e227"; } }
+.glyphicon-btc                    { &:before { content: "\e227"; } }
+.glyphicon-xbt                    { &:before { content: "\e227"; } }
+.glyphicon-yen                    { &:before { content: "\00a5"; } }
+.glyphicon-jpy                    { &:before { content: "\00a5"; } }
+.glyphicon-ruble                  { &:before { content: "\20bd"; } }
+.glyphicon-rub                    { &:before { content: "\20bd"; } }
+.glyphicon-scale                  { &:before { content: "\e230"; } }
+.glyphicon-ice-lolly              { &:before { content: "\e231"; } }
+.glyphicon-ice-lolly-tasted       { &:before { content: "\e232"; } }
+.glyphicon-education              { &:before { content: "\e233"; } }
+.glyphicon-option-horizontal      { &:before { content: "\e234"; } }
+.glyphicon-option-vertical        { &:before { content: "\e235"; } }
+.glyphicon-menu-hamburger         { &:before { content: "\e236"; } }
+.glyphicon-modal-window           { &:before { content: "\e237"; } }
+.glyphicon-oil                    { &:before { content: "\e238"; } }
+.glyphicon-grain                  { &:before { content: "\e239"; } }
+.glyphicon-sunglasses             { &:before { content: "\e240"; } }
+.glyphicon-text-size              { &:before { content: "\e241"; } }
+.glyphicon-text-color             { &:before { content: "\e242"; } }
+.glyphicon-text-background        { &:before { content: "\e243"; } }
+.glyphicon-object-align-top       { &:before { content: "\e244"; } }
+.glyphicon-object-align-bottom    { &:before { content: "\e245"; } }
+.glyphicon-object-align-horizontal{ &:before { content: "\e246"; } }
+.glyphicon-object-align-left      { &:before { content: "\e247"; } }
+.glyphicon-object-align-vertical  { &:before { content: "\e248"; } }
+.glyphicon-object-align-right     { &:before { content: "\e249"; } }
+.glyphicon-triangle-right         { &:before { content: "\e250"; } }
+.glyphicon-triangle-left          { &:before { content: "\e251"; } }
+.glyphicon-triangle-bottom        { &:before { content: "\e252"; } }
+.glyphicon-triangle-top           { &:before { content: "\e253"; } }
+.glyphicon-console                { &:before { content: "\e254"; } }
+.glyphicon-superscript            { &:before { content: "\e255"; } }
+.glyphicon-subscript              { &:before { content: "\e256"; } }
+.glyphicon-menu-left              { &:before { content: "\e257"; } }
+.glyphicon-menu-right             { &:before { content: "\e258"; } }
+.glyphicon-menu-down              { &:before { content: "\e259"; } }
+.glyphicon-menu-up                { &:before { content: "\e260"; } }
diff --git a/3rdparty/fmt/doc/bootstrap/grid.less b/3rdparty/fmt/doc/bootstrap/grid.less
new file mode 100644
index 00000000..2e61c942
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/grid.less
@@ -0,0 +1,84 @@
+//
+// Grid system
+// --------------------------------------------------
+
+
+// Container widths
+//
+// Set the container width, and override it for fixed navbars in media queries.
+
+.tb-container {
+  .container-fixed();
+
+  @media (min-width: @screen-sm-min) {
+    width: @container-sm;
+  }
+  @media (min-width: @screen-md-min) {
+    width: @container-md;
+  }
+  @media (min-width: @screen-lg-min) {
+    width: @container-lg;
+  }
+}
+
+
+// Fluid container
+//
+// Utilizes the mixin meant for fixed width containers, but without any defined
+// width for fluid, full width layouts.
+
+.container-fluid {
+  .container-fixed();
+}
+
+
+// Row
+//
+// Rows contain and clear the floats of your columns.
+
+.row {
+  .make-row();
+}
+
+
+// Columns
+//
+// Common styles for small and large grid columns
+
+.make-grid-columns();
+
+
+// Extra small grid
+//
+// Columns, offsets, pushes, and pulls for extra small devices like
+// smartphones.
+
+.make-grid(xs);
+
+
+// Small grid
+//
+// Columns, offsets, pushes, and pulls for the small device range, from phones
+// to tablets.
+
+@media (min-width: @screen-sm-min) {
+  .make-grid(sm);
+}
+
+
+// Medium grid
+//
+// Columns, offsets, pushes, and pulls for the desktop device range.
+
+@media (min-width: @screen-md-min) {
+  .make-grid(md);
+}
+
+
+// Large grid
+//
+// Columns, offsets, pushes, and pulls for the large desktop device range.
+
+@media (min-width: @screen-lg-min) {
+  .make-grid(lg);
+}
diff --git a/3rdparty/fmt/doc/bootstrap/input-groups.less b/3rdparty/fmt/doc/bootstrap/input-groups.less
new file mode 100644
index 00000000..a8712f25
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/input-groups.less
@@ -0,0 +1,166 @@
+//
+// Input groups
+// --------------------------------------------------
+
+// Base styles
+// -------------------------
+.input-group {
+  position: relative; // For dropdowns
+  display: table;
+  border-collapse: separate; // prevent input groups from inheriting border styles from table cells when placed within a table
+
+  // Undo padding and float of grid classes
+  &[class*="col-"] {
+    float: none;
+    padding-left: 0;
+    padding-right: 0;
+  }
+
+  .form-control {
+    // Ensure that the input is always above the *appended* addon button for
+    // proper border colors.
+    position: relative;
+    z-index: 2;
+
+    // IE9 fubars the placeholder attribute in text inputs and the arrows on
+    // select elements in input groups. To fix it, we float the input. Details:
+    // https://github.com/twbs/bootstrap/issues/11561#issuecomment-28936855
+    float: left;
+
+    width: 100%;
+    margin-bottom: 0;
+  }
+}
+
+// Sizing options
+//
+// Remix the default form control sizing classes into new ones for easier
+// manipulation.
+
+.input-group-lg > .form-control,
+.input-group-lg > .input-group-addon,
+.input-group-lg > .input-group-btn > .btn {
+  .input-lg();
+}
+.input-group-sm > .form-control,
+.input-group-sm > .input-group-addon,
+.input-group-sm > .input-group-btn > .btn {
+  .input-sm();
+}
+
+
+// Display as table-cell
+// -------------------------
+.input-group-addon,
+.input-group-btn,
+.input-group .form-control {
+  display: table-cell;
+
+  &:not(:first-child):not(:last-child) {
+    border-radius: 0;
+  }
+}
+// Addon and addon wrapper for buttons
+.input-group-addon,
+.input-group-btn {
+  width: 1%;
+  white-space: nowrap;
+  vertical-align: middle; // Match the inputs
+}
+
+// Text input groups
+// -------------------------
+.input-group-addon {
+  padding: @padding-base-vertical @padding-base-horizontal;
+  font-size: @font-size-base;
+  font-weight: normal;
+  line-height: 1;
+  color: @input-color;
+  text-align: center;
+  background-color: @input-group-addon-bg;
+  border: 1px solid @input-group-addon-border-color;
+  border-radius: @border-radius-base;
+
+  // Sizing
+  &.input-sm {
+    padding: @padding-small-vertical @padding-small-horizontal;
+    font-size: @font-size-small;
+    border-radius: @border-radius-small;
+  }
+  &.input-lg {
+    padding: @padding-large-vertical @padding-large-horizontal;
+    font-size: @font-size-large;
+    border-radius: @border-radius-large;
+  }
+
+  // Nuke default margins from checkboxes and radios to vertically center within.
+  input[type="radio"],
+  input[type="checkbox"] {
+    margin-top: 0;
+  }
+}
+
+// Reset rounded corners
+.input-group .form-control:first-child,
+.input-group-addon:first-child,
+.input-group-btn:first-child > .btn,
+.input-group-btn:first-child > .btn-group > .btn,
+.input-group-btn:first-child > .dropdown-toggle,
+.input-group-btn:last-child > .btn:not(:last-child):not(.dropdown-toggle),
+.input-group-btn:last-child > .btn-group:not(:last-child) > .btn {
+  .border-right-radius(0);
+}
+.input-group-addon:first-child {
+  border-right: 0;
+}
+.input-group .form-control:last-child,
+.input-group-addon:last-child,
+.input-group-btn:last-child > .btn,
+.input-group-btn:last-child > .btn-group > .btn,
+.input-group-btn:last-child > .dropdown-toggle,
+.input-group-btn:first-child > .btn:not(:first-child),
+.input-group-btn:first-child > .btn-group:not(:first-child) > .btn {
+  .border-left-radius(0);
+}
+.input-group-addon:last-child {
+  border-left: 0;
+}
+
+// Button input groups
+// -------------------------
+.input-group-btn {
+  position: relative;
+  // Jankily prevent input button groups from wrapping with `white-space` and
+  // `font-size` in combination with `inline-block` on buttons.
+  font-size: 0;
+  white-space: nowrap;
+
+  // Negative margin for spacing, position for bringing hovered/focused/actived
+  // element above the siblings.
+  > .btn {
+    position: relative;
+    + .btn {
+      margin-left: -1px;
+    }
+    // Bring the "active" button to the front
+    &:hover,
+    &:focus,
+    &:active {
+      z-index: 2;
+    }
+  }
+
+  // Negative margin to only have a 1px border between the two
+  &:first-child {
+    > .btn,
+    > .btn-group {
+      margin-right: -1px;
+    }
+  }
+  &:last-child {
+    > .btn,
+    > .btn-group {
+      margin-left: -1px;
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/jumbotron.less b/3rdparty/fmt/doc/bootstrap/jumbotron.less
new file mode 100644
index 00000000..909580f9
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/jumbotron.less
@@ -0,0 +1,50 @@
+//
+// Jumbotron
+// --------------------------------------------------
+
+
+.jumbotron {
+  padding: @jumbotron-padding (@jumbotron-padding / 2);
+  margin-bottom: @jumbotron-padding;
+  color: @jumbotron-color;
+  background-color: @jumbotron-bg;
+
+  h1,
+  .h1 {
+    color: @jumbotron-heading-color;
+  }
+
+  p {
+    margin-bottom: (@jumbotron-padding / 2);
+    font-size: @jumbotron-font-size;
+    font-weight: 200;
+  }
+
+  > hr {
+    border-top-color: darken(@jumbotron-bg, 10%);
+  }
+
+  .tb-container &,
+  .container-fluid & {
+    border-radius: @border-radius-large; // Only round corners at higher resolutions if contained in a container
+  }
+
+  .tb-container {
+    max-width: 100%;
+  }
+
+  @media screen and (min-width: @screen-sm-min) {
+    padding: (@jumbotron-padding * 1.6) 0;
+
+    .tb-container &,
+    .container-fluid & {
+      padding-left:  (@jumbotron-padding * 2);
+      padding-right: (@jumbotron-padding * 2);
+    }
+
+    h1,
+    .h1 {
+      font-size: (@font-size-base * 4.5);
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/labels.less b/3rdparty/fmt/doc/bootstrap/labels.less
new file mode 100644
index 00000000..9a5a2700
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/labels.less
@@ -0,0 +1,64 @@
+//
+// Labels
+// --------------------------------------------------
+
+.label {
+  display: inline;
+  padding: .2em .6em .3em;
+  font-size: 75%;
+  font-weight: bold;
+  line-height: 1;
+  color: @label-color;
+  text-align: center;
+  white-space: nowrap;
+  vertical-align: baseline;
+  border-radius: .25em;
+
+  // Add hover effects, but only for links
+  a& {
+    &:hover,
+    &:focus {
+      color: @label-link-hover-color;
+      text-decoration: none;
+      cursor: pointer;
+    }
+  }
+
+  // Empty labels collapse automatically (not available in IE8)
+  &:empty {
+    display: none;
+  }
+
+  // Quick fix for labels in buttons
+  .btn & {
+    position: relative;
+    top: -1px;
+  }
+}
+
+// Colors
+// Contextual variations (linked labels get darker on :hover)
+
+.label-default {
+  .label-variant(@label-default-bg);
+}
+
+.label-primary {
+  .label-variant(@label-primary-bg);
+}
+
+.label-success {
+  .label-variant(@label-success-bg);
+}
+
+.label-info {
+  .label-variant(@label-info-bg);
+}
+
+.label-warning {
+  .label-variant(@label-warning-bg);
+}
+
+.label-danger {
+  .label-variant(@label-danger-bg);
+}
diff --git a/3rdparty/fmt/doc/bootstrap/list-group.less b/3rdparty/fmt/doc/bootstrap/list-group.less
new file mode 100644
index 00000000..1462ce16
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/list-group.less
@@ -0,0 +1,124 @@
+//
+// List groups
+// --------------------------------------------------
+
+
+// Base class
+//
+// Easily usable on <ul>, <ol>, or <div>.
+
+.list-group {
+  // No need to set list-style: none; since .list-group-item is block level
+  margin-bottom: 20px;
+  padding-left: 0; // reset padding because ul and ol
+}
+
+
+// Individual list items
+//
+// Use on `li`s or `div`s within the `.list-group` parent.
+
+.list-group-item {
+  position: relative;
+  display: block;
+  padding: 10px 15px;
+  // Place the border on the list items and negative margin up for better styling
+  margin-bottom: -1px;
+  background-color: @list-group-bg;
+  border: 1px solid @list-group-border;
+
+  // Round the first and last items
+  &:first-child {
+    .border-top-radius(@list-group-border-radius);
+  }
+  &:last-child {
+    margin-bottom: 0;
+    .border-bottom-radius(@list-group-border-radius);
+  }
+}
+
+
+// Linked list items
+//
+// Use anchor elements instead of `li`s or `div`s to create linked list items.
+// Includes an extra `.active` modifier class for showing selected items.
+
+a.list-group-item {
+  color: @list-group-link-color;
+
+  .list-group-item-heading {
+    color: @list-group-link-heading-color;
+  }
+
+  // Hover state
+  &:hover,
+  &:focus {
+    text-decoration: none;
+    color: @list-group-link-hover-color;
+    background-color: @list-group-hover-bg;
+  }
+}
+
+.list-group-item {
+  // Disabled state
+  &.disabled,
+  &.disabled:hover,
+  &.disabled:focus {
+    background-color: @list-group-disabled-bg;
+    color: @list-group-disabled-color;
+    cursor: @cursor-disabled;
+
+    // Force color to inherit for custom content
+    .list-group-item-heading {
+      color: inherit;
+    }
+    .list-group-item-text {
+      color: @list-group-disabled-text-color;
+    }
+  }
+
+  // Active class on item itself, not parent
+  &.active,
+  &.active:hover,
+  &.active:focus {
+    z-index: 2; // Place active items above their siblings for proper border styling
+    color: @list-group-active-color;
+    background-color: @list-group-active-bg;
+    border-color: @list-group-active-border;
+
+    // Force color to inherit for custom content
+    .list-group-item-heading,
+    .list-group-item-heading > small,
+    .list-group-item-heading > .small {
+      color: inherit;
+    }
+    .list-group-item-text {
+      color: @list-group-active-text-color;
+    }
+  }
+}
+
+
+// Contextual variants
+//
+// Add modifier classes to change text and background color on individual items.
+// Organizationally, this must come after the `:hover` states.
+
+.list-group-item-variant(success; @state-success-bg; @state-success-text);
+.list-group-item-variant(info; @state-info-bg; @state-info-text);
+.list-group-item-variant(warning; @state-warning-bg; @state-warning-text);
+.list-group-item-variant(danger; @state-danger-bg; @state-danger-text);
+
+
+// Custom content options
+//
+// Extra classes for creating well-formatted content within `.list-group-item`s.
+
+.list-group-item-heading {
+  margin-top: 0;
+  margin-bottom: 5px;
+}
+.list-group-item-text {
+  margin-bottom: 0;
+  line-height: 1.3;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/media.less b/3rdparty/fmt/doc/bootstrap/media.less
new file mode 100644
index 00000000..a6bf7819
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/media.less
@@ -0,0 +1,61 @@
+.media {
+  // Proper spacing between instances of .media
+  margin-top: 15px;
+
+  &:first-child {
+    margin-top: 0;
+  }
+}
+
+.media,
+.media-body {
+  zoom: 1;
+  overflow: hidden;
+}
+
+.media-body {
+  width: 10000px;
+}
+
+.media-object {
+  display: block;
+}
+
+.media-right,
+.media > .pull-right {
+  padding-left: 10px;
+}
+
+.media-left,
+.media > .pull-left {
+  padding-right: 10px;
+}
+
+.media-left,
+.media-right,
+.media-body {
+  display: table-cell;
+  vertical-align: top;
+}
+
+.media-middle {
+  vertical-align: middle;
+}
+
+.media-bottom {
+  vertical-align: bottom;
+}
+
+// Reset margins on headings for tighter default spacing
+.media-heading {
+  margin-top: 0;
+  margin-bottom: 5px;
+}
+
+// Media list variation
+//
+// Undo default ul/ol styles
+.media-list {
+  padding-left: 0;
+  list-style: none;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins.less b/3rdparty/fmt/doc/bootstrap/mixins.less
new file mode 100644
index 00000000..af4408fc
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins.less
@@ -0,0 +1,39 @@
+// Mixins
+// --------------------------------------------------
+
+// Utilities
+@import "mixins/hide-text.less";
+@import "mixins/opacity.less";
+@import "mixins/image.less";
+@import "mixins/labels.less";
+@import "mixins/reset-filter.less";
+@import "mixins/resize.less";
+@import "mixins/responsive-visibility.less";
+@import "mixins/size.less";
+@import "mixins/tab-focus.less";
+@import "mixins/text-emphasis.less";
+@import "mixins/text-overflow.less";
+@import "mixins/vendor-prefixes.less";
+
+// Components
+@import "mixins/alerts.less";
+@import "mixins/buttons.less";
+@import "mixins/panels.less";
+@import "mixins/pagination.less";
+@import "mixins/list-group.less";
+@import "mixins/nav-divider.less";
+@import "mixins/forms.less";
+@import "mixins/progress-bar.less";
+@import "mixins/table-row.less";
+
+// Skins
+@import "mixins/background-variant.less";
+@import "mixins/border-radius.less";
+@import "mixins/gradients.less";
+
+// Layout
+@import "mixins/clearfix.less";
+@import "mixins/center-block.less";
+@import "mixins/nav-vertical-align.less";
+@import "mixins/grid-framework.less";
+@import "mixins/grid.less";
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/alerts.less b/3rdparty/fmt/doc/bootstrap/mixins/alerts.less
new file mode 100644
index 00000000..396196f4
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/alerts.less
@@ -0,0 +1,14 @@
+// Alerts
+
+.alert-variant(@background; @border; @text-color) {
+  background-color: @background;
+  border-color: @border;
+  color: @text-color;
+
+  hr {
+    border-top-color: darken(@border, 5%);
+  }
+  .alert-link {
+    color: darken(@text-color, 10%);
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/background-variant.less b/3rdparty/fmt/doc/bootstrap/mixins/background-variant.less
new file mode 100644
index 00000000..556e490d
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/background-variant.less
@@ -0,0 +1,8 @@
+// Contextual backgrounds
+
+.bg-variant(@color) {
+  background-color: @color;
+  a&:hover {
+    background-color: darken(@color, 10%);
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/border-radius.less b/3rdparty/fmt/doc/bootstrap/mixins/border-radius.less
new file mode 100644
index 00000000..ca05dbf4
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/border-radius.less
@@ -0,0 +1,18 @@
+// Single side border-radius
+
+.border-top-radius(@radius) {
+  border-top-right-radius: @radius;
+   border-top-left-radius: @radius;
+}
+.border-right-radius(@radius) {
+  border-bottom-right-radius: @radius;
+     border-top-right-radius: @radius;
+}
+.border-bottom-radius(@radius) {
+  border-bottom-right-radius: @radius;
+   border-bottom-left-radius: @radius;
+}
+.border-left-radius(@radius) {
+  border-bottom-left-radius: @radius;
+     border-top-left-radius: @radius;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/buttons.less b/3rdparty/fmt/doc/bootstrap/mixins/buttons.less
new file mode 100644
index 00000000..92d8a056
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/buttons.less
@@ -0,0 +1,52 @@
+// Button variants
+//
+// Easily pump out default styles, as well as :hover, :focus, :active,
+// and disabled options for all buttons
+
+.button-variant(@color; @background; @border) {
+  color: @color;
+  background-color: @background;
+  border-color: @border;
+
+  &:hover,
+  &:focus,
+  &.focus,
+  &:active,
+  &.active,
+  .open > .dropdown-toggle& {
+    color: @color;
+    background-color: darken(@background, 10%);
+        border-color: darken(@border, 12%);
+  }
+  &:active,
+  &.active,
+  .open > .dropdown-toggle& {
+    background-image: none;
+  }
+  &.disabled,
+  &[disabled],
+  fieldset[disabled] & {
+    &,
+    &:hover,
+    &:focus,
+    &.focus,
+    &:active,
+    &.active {
+      background-color: @background;
+          border-color: @border;
+    }
+  }
+
+  .badge {
+    color: @background;
+    background-color: @color;
+  }
+}
+
+// Button sizes
+.button-size(@padding-vertical; @padding-horizontal; @font-size; @line-height; @border-radius) {
+  padding: @padding-vertical @padding-horizontal;
+  font-size: @font-size;
+  line-height: @line-height;
+  border-radius: @border-radius;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/center-block.less b/3rdparty/fmt/doc/bootstrap/mixins/center-block.less
new file mode 100644
index 00000000..d18d6de9
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/center-block.less
@@ -0,0 +1,7 @@
+// Center-align a block level element
+
+.center-block() {
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/clearfix.less b/3rdparty/fmt/doc/bootstrap/mixins/clearfix.less
new file mode 100644
index 00000000..3f7a3820
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/clearfix.less
@@ -0,0 +1,22 @@
+// Clearfix
+//
+// For modern browsers
+// 1. The space content is one way to avoid an Opera bug when the
+//    contenteditable attribute is included anywhere else in the document.
+//    Otherwise it causes space to appear at the top and bottom of elements
+//    that are clearfixed.
+// 2. The use of `table` rather than `block` is only necessary if using
+//    `:before` to contain the top-margins of child elements.
+//
+// Source: http://nicolasgallagher.com/micro-clearfix-hack/
+
+.clearfix() {
+  &:before,
+  &:after {
+    content: " "; // 1
+    display: table; // 2
+  }
+  &:after {
+    clear: both;
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/forms.less b/3rdparty/fmt/doc/bootstrap/mixins/forms.less
new file mode 100644
index 00000000..6f55ed96
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/forms.less
@@ -0,0 +1,85 @@
+// Form validation states
+//
+// Used in forms.less to generate the form validation CSS for warnings, errors,
+// and successes.
+
+.form-control-validation(@text-color: #555; @border-color: #ccc; @background-color: #f5f5f5) {
+  // Color the label and help text
+  .help-block,
+  .control-label,
+  .radio,
+  .checkbox,
+  .radio-inline,
+  .checkbox-inline,
+  &.radio label,
+  &.checkbox label,
+  &.radio-inline label,
+  &.checkbox-inline label  {
+    color: @text-color;
+  }
+  // Set the border and box shadow on specific inputs to match
+  .form-control {
+    border-color: @border-color;
+    .box-shadow(inset 0 1px 1px rgba(0,0,0,.075)); // Redeclare so transitions work
+    &:focus {
+      border-color: darken(@border-color, 10%);
+      @shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 6px lighten(@border-color, 20%);
+      .box-shadow(@shadow);
+    }
+  }
+  // Set validation states also for addons
+  .input-group-addon {
+    color: @text-color;
+    border-color: @border-color;
+    background-color: @background-color;
+  }
+  // Optional feedback icon
+  .form-control-feedback {
+    color: @text-color;
+  }
+}
+
+
+// Form control focus state
+//
+// Generate a customized focus state and for any input with the specified color,
+// which defaults to the `@input-border-focus` variable.
+//
+// We highly encourage you to not customize the default value, but instead use
+// this to tweak colors on an as-needed basis. This aesthetic change is based on
+// WebKit's default styles, but applicable to a wider range of browsers. Its
+// usability and accessibility should be taken into account with any change.
+//
+// Example usage: change the default blue border and shadow to white for better
+// contrast against a dark gray background.
+.form-control-focus(@color: @input-border-focus) {
+  @color-rgba: rgba(red(@color), green(@color), blue(@color), .6);
+  &:focus {
+    border-color: @color;
+    outline: 0;
+    .box-shadow(~"inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px @{color-rgba}");
+  }
+}
+
+// Form control sizing
+//
+// Relative text size, padding, and border-radii changes for form controls. For
+// horizontal sizing, wrap controls in the predefined grid classes. `<select>`
+// element gets special love because it's special, and that's a fact!
+.input-size(@input-height; @padding-vertical; @padding-horizontal; @font-size; @line-height; @border-radius) {
+  height: @input-height;
+  padding: @padding-vertical @padding-horizontal;
+  font-size: @font-size;
+  line-height: @line-height;
+  border-radius: @border-radius;
+
+  select& {
+    height: @input-height;
+    line-height: @input-height;
+  }
+
+  textarea&,
+  select[multiple]& {
+    height: auto;
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/gradients.less b/3rdparty/fmt/doc/bootstrap/mixins/gradients.less
new file mode 100644
index 00000000..0b88a89c
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/gradients.less
@@ -0,0 +1,59 @@
+// Gradients
+
+#gradient {
+
+  // Horizontal gradient, from left to right
+  //
+  // Creates two color stops, start and end, by specifying a color and position for each color stop.
+  // Color stops are not available in IE9 and below.
+  .horizontal(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) {
+    background-image: -webkit-linear-gradient(left, @start-color @start-percent, @end-color @end-percent); // Safari 5.1-6, Chrome 10+
+    background-image: -o-linear-gradient(left, @start-color @start-percent, @end-color @end-percent); // Opera 12
+    background-image: linear-gradient(to right, @start-color @start-percent, @end-color @end-percent); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
+    background-repeat: repeat-x;
+    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",argb(@start-color),argb(@end-color))); // IE9 and down
+  }
+
+  // Vertical gradient, from top to bottom
+  //
+  // Creates two color stops, start and end, by specifying a color and position for each color stop.
+  // Color stops are not available in IE9 and below.
+  .vertical(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) {
+    background-image: -webkit-linear-gradient(top, @start-color @start-percent, @end-color @end-percent);  // Safari 5.1-6, Chrome 10+
+    background-image: -o-linear-gradient(top, @start-color @start-percent, @end-color @end-percent);  // Opera 12
+    background-image: linear-gradient(to bottom, @start-color @start-percent, @end-color @end-percent); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
+    background-repeat: repeat-x;
+    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@start-color),argb(@end-color))); // IE9 and down
+  }
+
+  .directional(@start-color: #555; @end-color: #333; @deg: 45deg) {
+    background-repeat: repeat-x;
+    background-image: -webkit-linear-gradient(@deg, @start-color, @end-color); // Safari 5.1-6, Chrome 10+
+    background-image: -o-linear-gradient(@deg, @start-color, @end-color); // Opera 12
+    background-image: linear-gradient(@deg, @start-color, @end-color); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
+  }
+  .horizontal-three-colors(@start-color: #00b3ee; @mid-color: #7a43b6; @color-stop: 50%; @end-color: #c3325f) {
+    background-image: -webkit-linear-gradient(left, @start-color, @mid-color @color-stop, @end-color);
+    background-image: -o-linear-gradient(left, @start-color, @mid-color @color-stop, @end-color);
+    background-image: linear-gradient(to right, @start-color, @mid-color @color-stop, @end-color);
+    background-repeat: no-repeat;
+    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",argb(@start-color),argb(@end-color))); // IE9 and down, gets no color-stop at all for proper fallback
+  }
+  .vertical-three-colors(@start-color: #00b3ee; @mid-color: #7a43b6; @color-stop: 50%; @end-color: #c3325f) {
+    background-image: -webkit-linear-gradient(@start-color, @mid-color @color-stop, @end-color);
+    background-image: -o-linear-gradient(@start-color, @mid-color @color-stop, @end-color);
+    background-image: linear-gradient(@start-color, @mid-color @color-stop, @end-color);
+    background-repeat: no-repeat;
+    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@start-color),argb(@end-color))); // IE9 and down, gets no color-stop at all for proper fallback
+  }
+  .radial(@inner-color: #555; @outer-color: #333) {
+    background-image: -webkit-radial-gradient(circle, @inner-color, @outer-color);
+    background-image: radial-gradient(circle, @inner-color, @outer-color);
+    background-repeat: no-repeat;
+  }
+  .striped(@color: rgba(255,255,255,.15); @angle: 45deg) {
+    background-image: -webkit-linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);
+    background-image: -o-linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);
+    background-image: linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/grid-framework.less b/3rdparty/fmt/doc/bootstrap/mixins/grid-framework.less
new file mode 100644
index 00000000..f3b3929d
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/grid-framework.less
@@ -0,0 +1,91 @@
+// Framework grid generation
+//
+// Used only by Bootstrap to generate the correct number of grid classes given
+// any value of `@grid-columns`.
+
+.make-grid-columns() {
+  // Common styles for all sizes of grid columns, widths 1-12
+  .col(@index) { // initial
+    @item: ~".col-xs-@{index}, .col-sm-@{index}, .col-md-@{index}, .col-lg-@{index}";
+    .col((@index + 1), @item);
+  }
+  .col(@index, @list) when (@index =< @grid-columns) { // general; "=<" isn't a typo
+    @item: ~".col-xs-@{index}, .col-sm-@{index}, .col-md-@{index}, .col-lg-@{index}";
+    .col((@index + 1), ~"@{list}, @{item}");
+  }
+  .col(@index, @list) when (@index > @grid-columns) { // terminal
+    @{list} {
+      position: relative;
+      // Prevent columns from collapsing when empty
+      min-height: 1px;
+      // Inner gutter via padding
+      padding-left:  (@grid-gutter-width / 2);
+      padding-right: (@grid-gutter-width / 2);
+    }
+  }
+  .col(1); // kickstart it
+}
+
+.float-grid-columns(@class) {
+  .col(@index) { // initial
+    @item: ~".col-@{class}-@{index}";
+    .col((@index + 1), @item);
+  }
+  .col(@index, @list) when (@index =< @grid-columns) { // general
+    @item: ~".col-@{class}-@{index}";
+    .col((@index + 1), ~"@{list}, @{item}");
+  }
+  .col(@index, @list) when (@index > @grid-columns) { // terminal
+    @{list} {
+      float: left;
+    }
+  }
+  .col(1); // kickstart it
+}
+
+.calc-grid-column(@index, @class, @type) when (@type = width) and (@index > 0) {
+  .col-@{class}-@{index} {
+    width: percentage((@index / @grid-columns));
+  }
+}
+.calc-grid-column(@index, @class, @type) when (@type = push) and (@index > 0) {
+  .col-@{class}-push-@{index} {
+    left: percentage((@index / @grid-columns));
+  }
+}
+.calc-grid-column(@index, @class, @type) when (@type = push) and (@index = 0) {
+  .col-@{class}-push-0 {
+    left: auto;
+  }
+}
+.calc-grid-column(@index, @class, @type) when (@type = pull) and (@index > 0) {
+  .col-@{class}-pull-@{index} {
+    right: percentage((@index / @grid-columns));
+  }
+}
+.calc-grid-column(@index, @class, @type) when (@type = pull) and (@index = 0) {
+  .col-@{class}-pull-0 {
+    right: auto;
+  }
+}
+.calc-grid-column(@index, @class, @type) when (@type = offset) {
+  .col-@{class}-offset-@{index} {
+    margin-left: percentage((@index / @grid-columns));
+  }
+}
+
+// Basic looping in LESS
+.loop-grid-columns(@index, @class, @type) when (@index >= 0) {
+  .calc-grid-column(@index, @class, @type);
+  // next iteration
+  .loop-grid-columns((@index - 1), @class, @type);
+}
+
+// Create grid for specific class
+.make-grid(@class) {
+  .float-grid-columns(@class);
+  .loop-grid-columns(@grid-columns, @class, width);
+  .loop-grid-columns(@grid-columns, @class, pull);
+  .loop-grid-columns(@grid-columns, @class, push);
+  .loop-grid-columns(@grid-columns, @class, offset);
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/grid.less b/3rdparty/fmt/doc/bootstrap/mixins/grid.less
new file mode 100644
index 00000000..cae5eaff
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/grid.less
@@ -0,0 +1,122 @@
+// Grid system
+//
+// Generate semantic grid columns with these mixins.
+
+// Centered container element
+.container-fixed(@gutter: @grid-gutter-width) {
+  margin-right: auto;
+  margin-left: auto;
+  padding-left:  (@gutter / 2);
+  padding-right: (@gutter / 2);
+  &:extend(.clearfix all);
+}
+
+// Creates a wrapper for a series of columns
+.make-row(@gutter: @grid-gutter-width) {
+  margin-left:  (@gutter / -2);
+  margin-right: (@gutter / -2);
+  &:extend(.clearfix all);
+}
+
+// Generate the extra small columns
+.make-xs-column(@columns; @gutter: @grid-gutter-width) {
+  position: relative;
+  float: left;
+  width: percentage((@columns / @grid-columns));
+  min-height: 1px;
+  padding-left:  (@gutter / 2);
+  padding-right: (@gutter / 2);
+}
+.make-xs-column-offset(@columns) {
+  margin-left: percentage((@columns / @grid-columns));
+}
+.make-xs-column-push(@columns) {
+  left: percentage((@columns / @grid-columns));
+}
+.make-xs-column-pull(@columns) {
+  right: percentage((@columns / @grid-columns));
+}
+
+// Generate the small columns
+.make-sm-column(@columns; @gutter: @grid-gutter-width) {
+  position: relative;
+  min-height: 1px;
+  padding-left:  (@gutter / 2);
+  padding-right: (@gutter / 2);
+
+  @media (min-width: @screen-sm-min) {
+    float: left;
+    width: percentage((@columns / @grid-columns));
+  }
+}
+.make-sm-column-offset(@columns) {
+  @media (min-width: @screen-sm-min) {
+    margin-left: percentage((@columns / @grid-columns));
+  }
+}
+.make-sm-column-push(@columns) {
+  @media (min-width: @screen-sm-min) {
+    left: percentage((@columns / @grid-columns));
+  }
+}
+.make-sm-column-pull(@columns) {
+  @media (min-width: @screen-sm-min) {
+    right: percentage((@columns / @grid-columns));
+  }
+}
+
+// Generate the medium columns
+.make-md-column(@columns; @gutter: @grid-gutter-width) {
+  position: relative;
+  min-height: 1px;
+  padding-left:  (@gutter / 2);
+  padding-right: (@gutter / 2);
+
+  @media (min-width: @screen-md-min) {
+    float: left;
+    width: percentage((@columns / @grid-columns));
+  }
+}
+.make-md-column-offset(@columns) {
+  @media (min-width: @screen-md-min) {
+    margin-left: percentage((@columns / @grid-columns));
+  }
+}
+.make-md-column-push(@columns) {
+  @media (min-width: @screen-md-min) {
+    left: percentage((@columns / @grid-columns));
+  }
+}
+.make-md-column-pull(@columns) {
+  @media (min-width: @screen-md-min) {
+    right: percentage((@columns / @grid-columns));
+  }
+}
+
+// Generate the large columns
+.make-lg-column(@columns; @gutter: @grid-gutter-width) {
+  position: relative;
+  min-height: 1px;
+  padding-left:  (@gutter / 2);
+  padding-right: (@gutter / 2);
+
+  @media (min-width: @screen-lg-min) {
+    float: left;
+    width: percentage((@columns / @grid-columns));
+  }
+}
+.make-lg-column-offset(@columns) {
+  @media (min-width: @screen-lg-min) {
+    margin-left: percentage((@columns / @grid-columns));
+  }
+}
+.make-lg-column-push(@columns) {
+  @media (min-width: @screen-lg-min) {
+    left: percentage((@columns / @grid-columns));
+  }
+}
+.make-lg-column-pull(@columns) {
+  @media (min-width: @screen-lg-min) {
+    right: percentage((@columns / @grid-columns));
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/hide-text.less b/3rdparty/fmt/doc/bootstrap/mixins/hide-text.less
new file mode 100644
index 00000000..c2315e57
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/hide-text.less
@@ -0,0 +1,21 @@
+// CSS image replacement
+//
+// Heads up! v3 launched with with only `.hide-text()`, but per our pattern for
+// mixins being reused as classes with the same name, this doesn't hold up. As
+// of v3.0.1 we have added `.text-hide()` and deprecated `.hide-text()`.
+//
+// Source: https://github.com/h5bp/html5-boilerplate/commit/aa0396eae757
+
+// Deprecated as of v3.0.1 (will be removed in v4)
+.hide-text() {
+  font: ~"0/0" a;
+  color: transparent;
+  text-shadow: none;
+  background-color: transparent;
+  border: 0;
+}
+
+// New mixin to use as of v3.0.1
+.text-hide() {
+  .hide-text();
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/image.less b/3rdparty/fmt/doc/bootstrap/mixins/image.less
new file mode 100644
index 00000000..f233cb3e
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/image.less
@@ -0,0 +1,33 @@
+// Image Mixins
+// - Responsive image
+// - Retina image
+
+
+// Responsive image
+//
+// Keep images from scaling beyond the width of their parents.
+.img-responsive(@display: block) {
+  display: @display;
+  max-width: 100%; // Part 1: Set a maximum relative to the parent
+  height: auto; // Part 2: Scale the height according to the width, otherwise you get stretching
+}
+
+
+// Retina image
+//
+// Short retina mixin for setting background-image and -size. Note that the
+// spelling of `min--moz-device-pixel-ratio` is intentional.
+.img-retina(@file-1x; @file-2x; @width-1x; @height-1x) {
+  background-image: url("@{file-1x}");
+
+  @media
+  only screen and (-webkit-min-device-pixel-ratio: 2),
+  only screen and (   min--moz-device-pixel-ratio: 2),
+  only screen and (     -o-min-device-pixel-ratio: 2/1),
+  only screen and (        min-device-pixel-ratio: 2),
+  only screen and (                min-resolution: 192dpi),
+  only screen and (                min-resolution: 2dppx) {
+    background-image: url("@{file-2x}");
+    background-size: @width-1x @height-1x;
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/labels.less b/3rdparty/fmt/doc/bootstrap/mixins/labels.less
new file mode 100644
index 00000000..9f7a67ee
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/labels.less
@@ -0,0 +1,12 @@
+// Labels
+
+.label-variant(@color) {
+  background-color: @color;
+
+  &[href] {
+    &:hover,
+    &:focus {
+      background-color: darken(@color, 10%);
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/list-group.less b/3rdparty/fmt/doc/bootstrap/mixins/list-group.less
new file mode 100644
index 00000000..8b5b065c
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/list-group.less
@@ -0,0 +1,29 @@
+// List Groups
+
+.list-group-item-variant(@state; @background; @color) {
+  .list-group-item-@{state} {
+    color: @color;
+    background-color: @background;
+
+    a& {
+      color: @color;
+
+      .list-group-item-heading {
+        color: inherit;
+      }
+
+      &:hover,
+      &:focus {
+        color: @color;
+        background-color: darken(@background, 5%);
+      }
+      &.active,
+      &.active:hover,
+      &.active:focus {
+        color: #fff;
+        background-color: @color;
+        border-color: @color;
+      }
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/nav-divider.less b/3rdparty/fmt/doc/bootstrap/mixins/nav-divider.less
new file mode 100644
index 00000000..feb1e9ed
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/nav-divider.less
@@ -0,0 +1,10 @@
+// Horizontal dividers
+//
+// Dividers (basically an hr) within dropdowns and nav lists
+
+.nav-divider(@color: #e5e5e5) {
+  height: 1px;
+  margin: ((@line-height-computed / 2) - 1) 0;
+  overflow: hidden;
+  background-color: @color;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/nav-vertical-align.less b/3rdparty/fmt/doc/bootstrap/mixins/nav-vertical-align.less
new file mode 100644
index 00000000..d458c786
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/nav-vertical-align.less
@@ -0,0 +1,9 @@
+// Navbar vertical align
+//
+// Vertically center elements in the navbar.
+// Example: an element has a height of 30px, so write out `.navbar-vertical-align(30px);` to calculate the appropriate top margin.
+
+.navbar-vertical-align(@element-height) {
+  margin-top: ((@navbar-height - @element-height) / 2);
+  margin-bottom: ((@navbar-height - @element-height) / 2);
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/opacity.less b/3rdparty/fmt/doc/bootstrap/mixins/opacity.less
new file mode 100644
index 00000000..33ed25ce
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/opacity.less
@@ -0,0 +1,8 @@
+// Opacity
+
+.opacity(@opacity) {
+  opacity: @opacity;
+  // IE8 filter
+  @opacity-ie: (@opacity * 100);
+  filter: ~"alpha(opacity=@{opacity-ie})";
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/pagination.less b/3rdparty/fmt/doc/bootstrap/mixins/pagination.less
new file mode 100644
index 00000000..7deb505d
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/pagination.less
@@ -0,0 +1,23 @@
+// Pagination
+
+.pagination-size(@padding-vertical; @padding-horizontal; @font-size; @border-radius) {
+  > li {
+    > a,
+    > span {
+      padding: @padding-vertical @padding-horizontal;
+      font-size: @font-size;
+    }
+    &:first-child {
+      > a,
+      > span {
+        .border-left-radius(@border-radius);
+      }
+    }
+    &:last-child {
+      > a,
+      > span {
+        .border-right-radius(@border-radius);
+      }
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/panels.less b/3rdparty/fmt/doc/bootstrap/mixins/panels.less
new file mode 100644
index 00000000..49ee10d4
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/panels.less
@@ -0,0 +1,24 @@
+// Panels
+
+.panel-variant(@border; @heading-text-color; @heading-bg-color; @heading-border) {
+  border-color: @border;
+
+  & > .panel-heading {
+    color: @heading-text-color;
+    background-color: @heading-bg-color;
+    border-color: @heading-border;
+
+    + .panel-collapse > .panel-body {
+      border-top-color: @border;
+    }
+    .badge {
+      color: @heading-bg-color;
+      background-color: @heading-text-color;
+    }
+  }
+  & > .panel-footer {
+    + .panel-collapse > .panel-body {
+      border-bottom-color: @border;
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/progress-bar.less b/3rdparty/fmt/doc/bootstrap/mixins/progress-bar.less
new file mode 100644
index 00000000..f07996a3
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/progress-bar.less
@@ -0,0 +1,10 @@
+// Progress bars
+
+.progress-bar-variant(@color) {
+  background-color: @color;
+
+  // Deprecated parent class requirement as of v3.2.0
+  .progress-striped & {
+    #gradient > .striped();
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/reset-filter.less b/3rdparty/fmt/doc/bootstrap/mixins/reset-filter.less
new file mode 100644
index 00000000..68cdb5e1
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/reset-filter.less
@@ -0,0 +1,8 @@
+// Reset filters for IE
+//
+// When you need to remove a gradient background, do not forget to use this to reset
+// the IE filter for IE9 and below.
+
+.reset-filter() {
+  filter: e(%("progid:DXImageTransform.Microsoft.gradient(enabled = false)"));
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/resize.less b/3rdparty/fmt/doc/bootstrap/mixins/resize.less
new file mode 100644
index 00000000..3acd3afd
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/resize.less
@@ -0,0 +1,6 @@
+// Resize anything
+
+.resizable(@direction) {
+  resize: @direction; // Options: horizontal, vertical, both
+  overflow: auto; // Per CSS3 UI, `resize` only applies when `overflow` isn't `visible`
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/responsive-visibility.less b/3rdparty/fmt/doc/bootstrap/mixins/responsive-visibility.less
new file mode 100644
index 00000000..f7951c3d
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/responsive-visibility.less
@@ -0,0 +1,15 @@
+// Responsive utilities
+
+//
+// More easily include all the states for responsive-utilities.less.
+.responsive-visibility() {
+  display: block !important;
+  table&  { display: table; }
+  tr&     { display: table-row !important; }
+  th&,
+  td&     { display: table-cell !important; }
+}
+
+.responsive-invisibility() {
+  display: none !important;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/size.less b/3rdparty/fmt/doc/bootstrap/mixins/size.less
new file mode 100644
index 00000000..a8be6508
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/size.less
@@ -0,0 +1,10 @@
+// Sizing shortcuts
+
+.size(@width; @height) {
+  width: @width;
+  height: @height;
+}
+
+.square(@size) {
+  .size(@size; @size);
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/tab-focus.less b/3rdparty/fmt/doc/bootstrap/mixins/tab-focus.less
new file mode 100644
index 00000000..1f1f05ab
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/tab-focus.less
@@ -0,0 +1,9 @@
+// WebKit-style focus
+
+.tab-focus() {
+  // Default
+  outline: thin dotted;
+  // WebKit
+  outline: 5px auto -webkit-focus-ring-color;
+  outline-offset: -2px;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/table-row.less b/3rdparty/fmt/doc/bootstrap/mixins/table-row.less
new file mode 100644
index 00000000..0f287f1a
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/table-row.less
@@ -0,0 +1,28 @@
+// Tables
+
+.table-row-variant(@state; @background) {
+  // Exact selectors below required to override `.table-striped` and prevent
+  // inheritance to nested tables.
+  .table > thead > tr,
+  .table > tbody > tr,
+  .table > tfoot > tr {
+    > td.@{state},
+    > th.@{state},
+    &.@{state} > td,
+    &.@{state} > th {
+      background-color: @background;
+    }
+  }
+
+  // Hover states for `.table-hover`
+  // Note: this is not available for cells or rows within `thead` or `tfoot`.
+  .table-hover > tbody > tr {
+    > td.@{state}:hover,
+    > th.@{state}:hover,
+    &.@{state}:hover > td,
+    &:hover > .@{state},
+    &.@{state}:hover > th {
+      background-color: darken(@background, 5%);
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/text-emphasis.less b/3rdparty/fmt/doc/bootstrap/mixins/text-emphasis.less
new file mode 100644
index 00000000..0868ef9f
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/text-emphasis.less
@@ -0,0 +1,8 @@
+// Typography
+
+.text-emphasis-variant(@color) {
+  color: @color;
+  a&:hover {
+    color: darken(@color, 10%);
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/text-overflow.less b/3rdparty/fmt/doc/bootstrap/mixins/text-overflow.less
new file mode 100644
index 00000000..c11ad2fb
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/text-overflow.less
@@ -0,0 +1,8 @@
+// Text overflow
+// Requires inline-block or block for proper styling
+
+.text-overflow() {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/vendor-prefixes.less b/3rdparty/fmt/doc/bootstrap/mixins/vendor-prefixes.less
new file mode 100644
index 00000000..afd3331c
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/mixins/vendor-prefixes.less
@@ -0,0 +1,227 @@
+// Vendor Prefixes
+//
+// All vendor mixins are deprecated as of v3.2.0 due to the introduction of
+// Autoprefixer in our Gruntfile. They will be removed in v4.
+
+// - Animations
+// - Backface visibility
+// - Box shadow
+// - Box sizing
+// - Content columns
+// - Hyphens
+// - Placeholder text
+// - Transformations
+// - Transitions
+// - User Select
+
+
+// Animations
+.animation(@animation) {
+  -webkit-animation: @animation;
+       -o-animation: @animation;
+          animation: @animation;
+}
+.animation-name(@name) {
+  -webkit-animation-name: @name;
+          animation-name: @name;
+}
+.animation-duration(@duration) {
+  -webkit-animation-duration: @duration;
+          animation-duration: @duration;
+}
+.animation-timing-function(@timing-function) {
+  -webkit-animation-timing-function: @timing-function;
+          animation-timing-function: @timing-function;
+}
+.animation-delay(@delay) {
+  -webkit-animation-delay: @delay;
+          animation-delay: @delay;
+}
+.animation-iteration-count(@iteration-count) {
+  -webkit-animation-iteration-count: @iteration-count;
+          animation-iteration-count: @iteration-count;
+}
+.animation-direction(@direction) {
+  -webkit-animation-direction: @direction;
+          animation-direction: @direction;
+}
+.animation-fill-mode(@fill-mode) {
+  -webkit-animation-fill-mode: @fill-mode;
+          animation-fill-mode: @fill-mode;
+}
+
+// Backface visibility
+// Prevent browsers from flickering when using CSS 3D transforms.
+// Default value is `visible`, but can be changed to `hidden`
+
+.backface-visibility(@visibility){
+  -webkit-backface-visibility: @visibility;
+     -moz-backface-visibility: @visibility;
+          backface-visibility: @visibility;
+}
+
+// Drop shadows
+//
+// Note: Deprecated `.box-shadow()` as of v3.1.0 since all of Bootstrap's
+// supported browsers that have box shadow capabilities now support it.
+
+.box-shadow(@shadow) {
+  -webkit-box-shadow: @shadow; // iOS <4.3 & Android <4.1
+          box-shadow: @shadow;
+}
+
+// Box sizing
+.box-sizing(@boxmodel) {
+  -webkit-box-sizing: @boxmodel;
+     -moz-box-sizing: @boxmodel;
+          box-sizing: @boxmodel;
+}
+
+// CSS3 Content Columns
+.content-columns(@column-count; @column-gap: @grid-gutter-width) {
+  -webkit-column-count: @column-count;
+     -moz-column-count: @column-count;
+          column-count: @column-count;
+  -webkit-column-gap: @column-gap;
+     -moz-column-gap: @column-gap;
+          column-gap: @column-gap;
+}
+
+// Optional hyphenation
+.hyphens(@mode: auto) {
+  word-wrap: break-word;
+  -webkit-hyphens: @mode;
+     -moz-hyphens: @mode;
+      -ms-hyphens: @mode; // IE10+
+       -o-hyphens: @mode;
+          hyphens: @mode;
+}
+
+// Placeholder text
+.placeholder(@color: @input-color-placeholder) {
+  // Firefox
+  &::-moz-placeholder {
+    color: @color;
+    opacity: 1; // Override Firefox's unusual default opacity; see https://github.com/twbs/bootstrap/pull/11526
+  }
+  &:-ms-input-placeholder { color: @color; } // Internet Explorer 10+
+  &::-webkit-input-placeholder  { color: @color; } // Safari and Chrome
+}
+
+// Transformations
+.scale(@ratio) {
+  -webkit-transform: scale(@ratio);
+      -ms-transform: scale(@ratio); // IE9 only
+       -o-transform: scale(@ratio);
+          transform: scale(@ratio);
+}
+.scale(@ratioX; @ratioY) {
+  -webkit-transform: scale(@ratioX, @ratioY);
+      -ms-transform: scale(@ratioX, @ratioY); // IE9 only
+       -o-transform: scale(@ratioX, @ratioY);
+          transform: scale(@ratioX, @ratioY);
+}
+.scaleX(@ratio) {
+  -webkit-transform: scaleX(@ratio);
+      -ms-transform: scaleX(@ratio); // IE9 only
+       -o-transform: scaleX(@ratio);
+          transform: scaleX(@ratio);
+}
+.scaleY(@ratio) {
+  -webkit-transform: scaleY(@ratio);
+      -ms-transform: scaleY(@ratio); // IE9 only
+       -o-transform: scaleY(@ratio);
+          transform: scaleY(@ratio);
+}
+.skew(@x; @y) {
+  -webkit-transform: skewX(@x) skewY(@y);
+      -ms-transform: skewX(@x) skewY(@y); // See https://github.com/twbs/bootstrap/issues/4885; IE9+
+       -o-transform: skewX(@x) skewY(@y);
+          transform: skewX(@x) skewY(@y);
+}
+.translate(@x; @y) {
+  -webkit-transform: translate(@x, @y);
+      -ms-transform: translate(@x, @y); // IE9 only
+       -o-transform: translate(@x, @y);
+          transform: translate(@x, @y);
+}
+.translate3d(@x; @y; @z) {
+  -webkit-transform: translate3d(@x, @y, @z);
+          transform: translate3d(@x, @y, @z);
+}
+.rotate(@degrees) {
+  -webkit-transform: rotate(@degrees);
+      -ms-transform: rotate(@degrees); // IE9 only
+       -o-transform: rotate(@degrees);
+          transform: rotate(@degrees);
+}
+.rotateX(@degrees) {
+  -webkit-transform: rotateX(@degrees);
+      -ms-transform: rotateX(@degrees); // IE9 only
+       -o-transform: rotateX(@degrees);
+          transform: rotateX(@degrees);
+}
+.rotateY(@degrees) {
+  -webkit-transform: rotateY(@degrees);
+      -ms-transform: rotateY(@degrees); // IE9 only
+       -o-transform: rotateY(@degrees);
+          transform: rotateY(@degrees);
+}
+.perspective(@perspective) {
+  -webkit-perspective: @perspective;
+     -moz-perspective: @perspective;
+          perspective: @perspective;
+}
+.perspective-origin(@perspective) {
+  -webkit-perspective-origin: @perspective;
+     -moz-perspective-origin: @perspective;
+          perspective-origin: @perspective;
+}
+.transform-origin(@origin) {
+  -webkit-transform-origin: @origin;
+     -moz-transform-origin: @origin;
+      -ms-transform-origin: @origin; // IE9 only
+          transform-origin: @origin;
+}
+
+
+// Transitions
+
+.transition(@transition) {
+  -webkit-transition: @transition;
+       -o-transition: @transition;
+          transition: @transition;
+}
+.transition-property(@transition-property) {
+  -webkit-transition-property: @transition-property;
+          transition-property: @transition-property;
+}
+.transition-delay(@transition-delay) {
+  -webkit-transition-delay: @transition-delay;
+          transition-delay: @transition-delay;
+}
+.transition-duration(@transition-duration) {
+  -webkit-transition-duration: @transition-duration;
+          transition-duration: @transition-duration;
+}
+.transition-timing-function(@timing-function) {
+  -webkit-transition-timing-function: @timing-function;
+          transition-timing-function: @timing-function;
+}
+.transition-transform(@transition) {
+  -webkit-transition: -webkit-transform @transition;
+     -moz-transition: -moz-transform @transition;
+       -o-transition: -o-transform @transition;
+          transition: transform @transition;
+}
+
+
+// User select
+// For selecting text on the page
+
+.user-select(@select) {
+  -webkit-user-select: @select;
+     -moz-user-select: @select;
+      -ms-user-select: @select; // IE10+
+          user-select: @select;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/modals.less b/3rdparty/fmt/doc/bootstrap/modals.less
new file mode 100644
index 00000000..1de62205
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/modals.less
@@ -0,0 +1,150 @@
+//
+// Modals
+// --------------------------------------------------
+
+// .modal-open      - body class for killing the scroll
+// .modal           - container to scroll within
+// .modal-dialog    - positioning shell for the actual modal
+// .modal-content   - actual modal w/ bg and corners and shit
+
+// Kill the scroll on the body
+.modal-open {
+  overflow: hidden;
+}
+
+// Container that the modal scrolls within
+.modal {
+  display: none;
+  overflow: hidden;
+  position: fixed;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  left: 0;
+  z-index: @zindex-modal;
+  -webkit-overflow-scrolling: touch;
+
+  // Prevent Chrome on Windows from adding a focus outline. For details, see
+  // https://github.com/twbs/bootstrap/pull/10951.
+  outline: 0;
+
+  // When fading in the modal, animate it to slide down
+  &.fade .modal-dialog {
+    .translate(0, -25%);
+    .transition-transform(~"0.3s ease-out");
+  }
+  &.in .modal-dialog { .translate(0, 0) }
+}
+.modal-open .modal {
+  overflow-x: hidden;
+  overflow-y: auto;
+}
+
+// Shell div to position the modal with bottom padding
+.modal-dialog {
+  position: relative;
+  width: auto;
+  margin: 10px;
+}
+
+// Actual modal
+.modal-content {
+  position: relative;
+  background-color: @modal-content-bg;
+  border: 1px solid @modal-content-fallback-border-color; //old browsers fallback (ie8 etc)
+  border: 1px solid @modal-content-border-color;
+  border-radius: @border-radius-large;
+  .box-shadow(0 3px 9px rgba(0,0,0,.5));
+  background-clip: padding-box;
+  // Remove focus outline from opened modal
+  outline: 0;
+}
+
+// Modal background
+.modal-backdrop {
+  position: fixed;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  left: 0;
+  z-index: @zindex-modal-background;
+  background-color: @modal-backdrop-bg;
+  // Fade for backdrop
+  &.fade { .opacity(0); }
+  &.in { .opacity(@modal-backdrop-opacity); }
+}
+
+// Modal header
+// Top section of the modal w/ title and dismiss
+.modal-header {
+  padding: @modal-title-padding;
+  border-bottom: 1px solid @modal-header-border-color;
+  min-height: (@modal-title-padding + @modal-title-line-height);
+}
+// Close icon
+.modal-header .close {
+  margin-top: -2px;
+}
+
+// Title text within header
+.modal-title {
+  margin: 0;
+  line-height: @modal-title-line-height;
+}
+
+// Modal body
+// Where all modal content resides (sibling of .modal-header and .modal-footer)
+.modal-body {
+  position: relative;
+  padding: @modal-inner-padding;
+}
+
+// Footer (for actions)
+.modal-footer {
+  padding: @modal-inner-padding;
+  text-align: right; // right align buttons
+  border-top: 1px solid @modal-footer-border-color;
+  &:extend(.clearfix all); // clear it in case folks use .pull-* classes on buttons
+
+  // Properly space out buttons
+  .btn + .btn {
+    margin-left: 5px;
+    margin-bottom: 0; // account for input[type="submit"] which gets the bottom margin like all other inputs
+  }
+  // but override that for button groups
+  .btn-group .btn + .btn {
+    margin-left: -1px;
+  }
+  // and override it for block buttons as well
+  .btn-block + .btn-block {
+    margin-left: 0;
+  }
+}
+
+// Measure scrollbar width for padding body during modal show/hide
+.modal-scrollbar-measure {
+  position: absolute;
+  top: -9999px;
+  width: 50px;
+  height: 50px;
+  overflow: scroll;
+}
+
+// Scale up the modal
+@media (min-width: @screen-sm-min) {
+  // Automatically set modal's width for larger viewports
+  .modal-dialog {
+    width: @modal-md;
+    margin: 30px auto;
+  }
+  .modal-content {
+    .box-shadow(0 5px 15px rgba(0,0,0,.5));
+  }
+
+  // Modal sizes
+  .modal-sm { width: @modal-sm; }
+}
+
+@media (min-width: @screen-md-min) {
+  .modal-lg { width: @modal-lg; }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/navbar.less b/3rdparty/fmt/doc/bootstrap/navbar.less
new file mode 100644
index 00000000..03f4e2ac
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/navbar.less
@@ -0,0 +1,660 @@
+//
+// Navbars
+// --------------------------------------------------
+
+
+// Wrapper and base class
+//
+// Provide a static navbar from which we expand to create full-width, fixed, and
+// other navbar variations.
+
+.navbar {
+  position: relative;
+  min-height: @navbar-height; // Ensure a navbar always shows (e.g., without a .navbar-brand in collapsed mode)
+  margin-bottom: @navbar-margin-bottom;
+  border: 1px solid transparent;
+
+  // Prevent floats from breaking the navbar
+  &:extend(.clearfix all);
+
+  @media (min-width: @grid-float-breakpoint) {
+    border-radius: @navbar-border-radius;
+  }
+}
+
+
+// Navbar heading
+//
+// Groups `.navbar-brand` and `.navbar-toggle` into a single component for easy
+// styling of responsive aspects.
+
+.navbar-header {
+  &:extend(.clearfix all);
+
+  @media (min-width: @grid-float-breakpoint) {
+    float: left;
+  }
+}
+
+
+// Navbar collapse (body)
+//
+// Group your navbar content into this for easy collapsing and expanding across
+// various device sizes. By default, this content is collapsed when <768px, but
+// will expand past that for a horizontal display.
+//
+// To start (on mobile devices) the navbar links, forms, and buttons are stacked
+// vertically and include a `max-height` to overflow in case you have too much
+// content for the user's viewport.
+
+.navbar-collapse {
+  overflow-x: visible;
+  padding-right: @navbar-padding-horizontal;
+  padding-left:  @navbar-padding-horizontal;
+  border-top: 1px solid transparent;
+  box-shadow: inset 0 1px 0 rgba(255,255,255,.1);
+  &:extend(.clearfix all);
+  -webkit-overflow-scrolling: touch;
+
+  &.in {
+    overflow-y: auto;
+  }
+
+  @media (min-width: @grid-float-breakpoint) {
+    width: auto;
+    border-top: 0;
+    box-shadow: none;
+
+    &.collapse {
+      display: block !important;
+      height: auto !important;
+      padding-bottom: 0; // Override default setting
+      overflow: visible !important;
+    }
+
+    &.in {
+      overflow-y: visible;
+    }
+
+    // Undo the collapse side padding for navbars with containers to ensure
+    // alignment of right-aligned contents.
+    .navbar-fixed-top &,
+    .navbar-static-top &,
+    .navbar-fixed-bottom & {
+      padding-left: 0;
+      padding-right: 0;
+    }
+  }
+}
+
+.navbar-fixed-top,
+.navbar-fixed-bottom {
+  .navbar-collapse {
+    max-height: @navbar-collapse-max-height;
+
+    @media (max-device-width: @screen-xs-min) and (orientation: landscape) {
+      max-height: 200px;
+    }
+  }
+}
+
+
+// Both navbar header and collapse
+//
+// When a container is present, change the behavior of the header and collapse.
+
+.tb-container,
+.container-fluid {
+  > .navbar-header,
+  > .navbar-collapse {
+    margin-right: -@navbar-padding-horizontal;
+    margin-left:  -@navbar-padding-horizontal;
+
+    @media (min-width: @grid-float-breakpoint) {
+      margin-right: 0;
+      margin-left:  0;
+    }
+  }
+}
+
+
+//
+// Navbar alignment options
+//
+// Display the navbar across the entirety of the page or fixed it to the top or
+// bottom of the page.
+
+// Static top (unfixed, but 100% wide) navbar
+.navbar-static-top {
+  z-index: @zindex-navbar;
+  border-width: 0 0 1px;
+
+  @media (min-width: @grid-float-breakpoint) {
+    border-radius: 0;
+  }
+}
+
+// Fix the top/bottom navbars when screen real estate supports it
+.navbar-fixed-top,
+.navbar-fixed-bottom {
+  position: fixed;
+  right: 0;
+  left: 0;
+  z-index: @zindex-navbar-fixed;
+
+  // Undo the rounded corners
+  @media (min-width: @grid-float-breakpoint) {
+    border-radius: 0;
+  }
+}
+.navbar-fixed-top {
+  top: 0;
+  border-width: 0 0 1px;
+}
+.navbar-fixed-bottom {
+  bottom: 0;
+  margin-bottom: 0; // override .navbar defaults
+  border-width: 1px 0 0;
+}
+
+
+// Brand/project name
+
+.navbar-brand {
+  float: left;
+  padding: @navbar-padding-vertical @navbar-padding-horizontal;
+  font-size: @font-size-large;
+  line-height: @line-height-computed;
+  height: @navbar-height;
+
+  &:hover,
+  &:focus {
+    text-decoration: none;
+  }
+
+  > img {
+    display: block;
+  }
+
+  @media (min-width: @grid-float-breakpoint) {
+    .navbar > .tb-container &,
+    .navbar > .container-fluid & {
+      margin-left: -@navbar-padding-horizontal;
+    }
+  }
+}
+
+
+// Navbar toggle
+//
+// Custom button for toggling the `.navbar-collapse`, powered by the collapse
+// JavaScript plugin.
+
+.navbar-toggle {
+  position: relative;
+  float: right;
+  margin-right: @navbar-padding-horizontal;
+  padding: 9px 10px;
+  .navbar-vertical-align(34px);
+  background-color: transparent;
+  background-image: none; // Reset unusual Firefox-on-Android default style; see https://github.com/necolas/normalize.css/issues/214
+  border: 1px solid transparent;
+  border-radius: @border-radius-base;
+
+  // We remove the `outline` here, but later compensate by attaching `:hover`
+  // styles to `:focus`.
+  &:focus {
+    outline: 0;
+  }
+
+  // Bars
+  .icon-bar {
+    display: block;
+    width: 22px;
+    height: 2px;
+    border-radius: 1px;
+  }
+  .icon-bar + .icon-bar {
+    margin-top: 4px;
+  }
+
+  @media (min-width: @grid-float-breakpoint) {
+    display: none;
+  }
+}
+
+
+// Navbar nav links
+//
+// Builds on top of the `.nav` components with its own modifier class to make
+// the nav the full height of the horizontal nav (above 768px).
+
+.navbar-nav {
+  margin: (@navbar-padding-vertical / 2) -@navbar-padding-horizontal;
+
+  > li > a {
+    padding-top:    10px;
+    padding-bottom: 10px;
+    line-height: @line-height-computed;
+  }
+
+  @media (max-width: @grid-float-breakpoint-max) {
+    // Dropdowns get custom display when collapsed
+    .open .dropdown-menu {
+      position: static;
+      float: none;
+      width: auto;
+      margin-top: 0;
+      background-color: transparent;
+      border: 0;
+      box-shadow: none;
+      > li > a,
+      .dropdown-header {
+        padding: 5px 15px 5px 25px;
+      }
+      > li > a {
+        line-height: @line-height-computed;
+        &:hover,
+        &:focus {
+          background-image: none;
+        }
+      }
+    }
+  }
+
+  // Uncollapse the nav
+  @media (min-width: @grid-float-breakpoint) {
+    float: left;
+    margin: 0;
+
+    > li {
+      float: left;
+      > a {
+        padding-top:    @navbar-padding-vertical;
+        padding-bottom: @navbar-padding-vertical;
+      }
+    }
+  }
+}
+
+
+// Navbar form
+//
+// Extension of the `.form-inline` with some extra flavor for optimum display in
+// our navbars.
+
+.navbar-form {
+  margin-left: -@navbar-padding-horizontal;
+  margin-right: -@navbar-padding-horizontal;
+  padding: 10px @navbar-padding-horizontal;
+  border-top: 1px solid transparent;
+  border-bottom: 1px solid transparent;
+  @shadow: inset 0 1px 0 rgba(255,255,255,.1), 0 1px 0 rgba(255,255,255,.1);
+  .box-shadow(@shadow);
+
+  // Mixin behavior for optimum display
+  .form-inline();
+
+  .form-group {
+    @media (max-width: @grid-float-breakpoint-max) {
+      margin-bottom: 5px;
+
+      &:last-child {
+        margin-bottom: 0;
+      }
+    }
+  }
+
+  // Vertically center in expanded, horizontal navbar
+  .navbar-vertical-align(@input-height-base);
+
+  // Undo 100% width for pull classes
+  @media (min-width: @grid-float-breakpoint) {
+    width: auto;
+    border: 0;
+    margin-left: 0;
+    margin-right: 0;
+    padding-top: 0;
+    padding-bottom: 0;
+    .box-shadow(none);
+  }
+}
+
+
+// Dropdown menus
+
+// Menu position and menu carets
+.navbar-nav > li > .dropdown-menu {
+  margin-top: 0;
+  .border-top-radius(0);
+}
+// Menu position and menu caret support for dropups via extra dropup class
+.navbar-fixed-bottom .navbar-nav > li > .dropdown-menu {
+  margin-bottom: 0;
+  .border-top-radius(@navbar-border-radius);
+  .border-bottom-radius(0);
+}
+
+
+// Buttons in navbars
+//
+// Vertically center a button within a navbar (when *not* in a form).
+
+.navbar-btn {
+  .navbar-vertical-align(@input-height-base);
+
+  &.btn-sm {
+    .navbar-vertical-align(@input-height-small);
+  }
+  &.btn-xs {
+    .navbar-vertical-align(22);
+  }
+}
+
+
+// Text in navbars
+//
+// Add a class to make any element properly align itself vertically within the navbars.
+
+.navbar-text {
+  .navbar-vertical-align(@line-height-computed);
+
+  @media (min-width: @grid-float-breakpoint) {
+    float: left;
+    margin-left: @navbar-padding-horizontal;
+    margin-right: @navbar-padding-horizontal;
+  }
+}
+
+
+// Component alignment
+//
+// Repurpose the pull utilities as their own navbar utilities to avoid specificity
+// issues with parents and chaining. Only do this when the navbar is uncollapsed
+// though so that navbar contents properly stack and align in mobile.
+//
+// Declared after the navbar components to ensure more specificity on the margins.
+
+@media (min-width: @grid-float-breakpoint) {
+  .navbar-left  { .pull-left(); }
+  .navbar-right {
+    .pull-right();
+    margin-right: -@navbar-padding-horizontal;
+
+    ~ .navbar-right {
+      margin-right: 0;
+    }
+  }
+}
+
+
+// Alternate navbars
+// --------------------------------------------------
+
+// Default navbar
+.navbar-default {
+  background-color: @navbar-default-bg;
+  border-color: @navbar-default-border;
+
+  .navbar-brand {
+    color: @navbar-default-brand-color;
+    &:hover,
+    &:focus {
+      color: @navbar-default-brand-hover-color;
+      background-color: @navbar-default-brand-hover-bg;
+    }
+  }
+
+  .navbar-text {
+    color: @navbar-default-color;
+  }
+
+  .navbar-nav {
+    > li > a {
+      color: @navbar-default-link-color;
+
+      &:hover,
+      &:focus {
+        color: @navbar-default-link-hover-color;
+        background-color: @navbar-default-link-hover-bg;
+      }
+    }
+    > .active > a {
+      &,
+      &:hover,
+      &:focus {
+        color: @navbar-default-link-active-color;
+        background-color: @navbar-default-link-active-bg;
+      }
+    }
+    > .disabled > a {
+      &,
+      &:hover,
+      &:focus {
+        color: @navbar-default-link-disabled-color;
+        background-color: @navbar-default-link-disabled-bg;
+      }
+    }
+  }
+
+  .navbar-toggle {
+    border-color: @navbar-default-toggle-border-color;
+    &:hover,
+    &:focus {
+      background-color: @navbar-default-toggle-hover-bg;
+    }
+    .icon-bar {
+      background-color: @navbar-default-toggle-icon-bar-bg;
+    }
+  }
+
+  .navbar-collapse,
+  .navbar-form {
+    border-color: @navbar-default-border;
+  }
+
+  // Dropdown menu items
+  .navbar-nav {
+    // Remove background color from open dropdown
+    > .open > a {
+      &,
+      &:hover,
+      &:focus {
+        background-color: @navbar-default-link-active-bg;
+        color: @navbar-default-link-active-color;
+      }
+    }
+
+    @media (max-width: @grid-float-breakpoint-max) {
+      // Dropdowns get custom display when collapsed
+      .open .dropdown-menu {
+        > li > a {
+          color: @navbar-default-link-color;
+          &:hover,
+          &:focus {
+            color: @navbar-default-link-hover-color;
+            background-color: @navbar-default-link-hover-bg;
+          }
+        }
+        > .active > a {
+          &,
+          &:hover,
+          &:focus {
+            color: @navbar-default-link-active-color;
+            background-color: @navbar-default-link-active-bg;
+          }
+        }
+        > .disabled > a {
+          &,
+          &:hover,
+          &:focus {
+            color: @navbar-default-link-disabled-color;
+            background-color: @navbar-default-link-disabled-bg;
+          }
+        }
+      }
+    }
+  }
+
+
+  // Links in navbars
+  //
+  // Add a class to ensure links outside the navbar nav are colored correctly.
+
+  .navbar-link {
+    color: @navbar-default-link-color;
+    &:hover {
+      color: @navbar-default-link-hover-color;
+    }
+  }
+
+  .btn-link {
+    color: @navbar-default-link-color;
+    &:hover,
+    &:focus {
+      color: @navbar-default-link-hover-color;
+    }
+    &[disabled],
+    fieldset[disabled] & {
+      &:hover,
+      &:focus {
+        color: @navbar-default-link-disabled-color;
+      }
+    }
+  }
+}
+
+// Inverse navbar
+
+.navbar-inverse {
+  background-color: @navbar-inverse-bg;
+  border-color: @navbar-inverse-border;
+
+  .navbar-brand {
+    color: @navbar-inverse-brand-color;
+    &:hover,
+    &:focus {
+      color: @navbar-inverse-brand-hover-color;
+      background-color: @navbar-inverse-brand-hover-bg;
+    }
+  }
+
+  .navbar-text {
+    color: @navbar-inverse-color;
+  }
+
+  .navbar-nav {
+    > li > a {
+      color: @navbar-inverse-link-color;
+
+      &:hover,
+      &:focus {
+        color: @navbar-inverse-link-hover-color;
+        background-color: @navbar-inverse-link-hover-bg;
+      }
+    }
+    > .active > a {
+      &,
+      &:hover,
+      &:focus {
+        color: @navbar-inverse-link-active-color;
+        background-color: @navbar-inverse-link-active-bg;
+      }
+    }
+    > .disabled > a {
+      &,
+      &:hover,
+      &:focus {
+        color: @navbar-inverse-link-disabled-color;
+        background-color: @navbar-inverse-link-disabled-bg;
+      }
+    }
+  }
+
+  // Darken the responsive nav toggle
+  .navbar-toggle {
+    border-color: @navbar-inverse-toggle-border-color;
+    &:hover,
+    &:focus {
+      background-color: @navbar-inverse-toggle-hover-bg;
+    }
+    .icon-bar {
+      background-color: @navbar-inverse-toggle-icon-bar-bg;
+    }
+  }
+
+  .navbar-collapse,
+  .navbar-form {
+    border-color: darken(@navbar-inverse-bg, 7%);
+  }
+
+  // Dropdowns
+  .navbar-nav {
+    > .open > a {
+      &,
+      &:hover,
+      &:focus {
+        background-color: @navbar-inverse-link-active-bg;
+        color: @navbar-inverse-link-active-color;
+      }
+    }
+
+    @media (max-width: @grid-float-breakpoint-max) {
+      // Dropdowns get custom display
+      .open .dropdown-menu {
+        > .dropdown-header {
+          border-color: @navbar-inverse-border;
+        }
+        .divider {
+          background-color: @navbar-inverse-border;
+        }
+        > li > a {
+          color: @navbar-inverse-link-color;
+          &:hover,
+          &:focus {
+            color: @navbar-inverse-link-hover-color;
+            background-color: @navbar-inverse-link-hover-bg;
+          }
+        }
+        > .active > a {
+          &,
+          &:hover,
+          &:focus {
+            color: @navbar-inverse-link-active-color;
+            background-color: @navbar-inverse-link-active-bg;
+          }
+        }
+        > .disabled > a {
+          &,
+          &:hover,
+          &:focus {
+            color: @navbar-inverse-link-disabled-color;
+            background-color: @navbar-inverse-link-disabled-bg;
+          }
+        }
+      }
+    }
+  }
+
+  .navbar-link {
+    color: @navbar-inverse-link-color;
+    &:hover {
+      color: @navbar-inverse-link-hover-color;
+    }
+  }
+
+  .btn-link {
+    color: @navbar-inverse-link-color;
+    &:hover,
+    &:focus {
+      color: @navbar-inverse-link-hover-color;
+    }
+    &[disabled],
+    fieldset[disabled] & {
+      &:hover,
+      &:focus {
+        color: @navbar-inverse-link-disabled-color;
+      }
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/navs.less b/3rdparty/fmt/doc/bootstrap/navs.less
new file mode 100644
index 00000000..a3d11b13
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/navs.less
@@ -0,0 +1,242 @@
+//
+// Navs
+// --------------------------------------------------
+
+
+// Base class
+// --------------------------------------------------
+
+.nav {
+  margin-bottom: 0;
+  padding-left: 0; // Override default ul/ol
+  list-style: none;
+  &:extend(.clearfix all);
+
+  > li {
+    position: relative;
+    display: block;
+
+    > a {
+      position: relative;
+      display: block;
+      padding: @nav-link-padding;
+      &:hover,
+      &:focus {
+        text-decoration: none;
+        background-color: @nav-link-hover-bg;
+      }
+    }
+
+    // Disabled state sets text to gray and nukes hover/tab effects
+    &.disabled > a {
+      color: @nav-disabled-link-color;
+
+      &:hover,
+      &:focus {
+        color: @nav-disabled-link-hover-color;
+        text-decoration: none;
+        background-color: transparent;
+        cursor: @cursor-disabled;
+      }
+    }
+  }
+
+  // Open dropdowns
+  .open > a {
+    &,
+    &:hover,
+    &:focus {
+      background-color: @nav-link-hover-bg;
+      border-color: @link-color;
+    }
+  }
+
+  // Nav dividers (deprecated with v3.0.1)
+  //
+  // This should have been removed in v3 with the dropping of `.nav-list`, but
+  // we missed it. We don't currently support this anywhere, but in the interest
+  // of maintaining backward compatibility in case you use it, it's deprecated.
+  .nav-divider {
+    .nav-divider();
+  }
+
+  // Prevent IE8 from misplacing imgs
+  //
+  // See https://github.com/h5bp/html5-boilerplate/issues/984#issuecomment-3985989
+  > li > a > img {
+    max-width: none;
+  }
+}
+
+
+// Tabs
+// -------------------------
+
+// Give the tabs something to sit on
+.nav-tabs {
+  border-bottom: 1px solid @nav-tabs-border-color;
+  > li {
+    float: left;
+    // Make the list-items overlay the bottom border
+    margin-bottom: -1px;
+
+    // Actual tabs (as links)
+    > a {
+      margin-right: 2px;
+      line-height: @line-height-base;
+      border: 1px solid transparent;
+      border-radius: @border-radius-base @border-radius-base 0 0;
+      &:hover {
+        border-color: @nav-tabs-link-hover-border-color @nav-tabs-link-hover-border-color @nav-tabs-border-color;
+      }
+    }
+
+    // Active state, and its :hover to override normal :hover
+    &.active > a {
+      &,
+      &:hover,
+      &:focus {
+        color: @nav-tabs-active-link-hover-color;
+        background-color: @nav-tabs-active-link-hover-bg;
+        border: 1px solid @nav-tabs-active-link-hover-border-color;
+        border-bottom-color: transparent;
+        cursor: default;
+      }
+    }
+  }
+  // pulling this in mainly for less shorthand
+  &.nav-justified {
+    .nav-justified();
+    .nav-tabs-justified();
+  }
+}
+
+
+// Pills
+// -------------------------
+.nav-pills {
+  > li {
+    float: left;
+
+    // Links rendered as pills
+    > a {
+      border-radius: @nav-pills-border-radius;
+    }
+    + li {
+      margin-left: 2px;
+    }
+
+    // Active state
+    &.active > a {
+      &,
+      &:hover,
+      &:focus {
+        color: @nav-pills-active-link-hover-color;
+        background-color: @nav-pills-active-link-hover-bg;
+      }
+    }
+  }
+}
+
+
+// Stacked pills
+.nav-stacked {
+  > li {
+    float: none;
+    + li {
+      margin-top: 2px;
+      margin-left: 0; // no need for this gap between nav items
+    }
+  }
+}
+
+
+// Nav variations
+// --------------------------------------------------
+
+// Justified nav links
+// -------------------------
+
+.nav-justified {
+  width: 100%;
+
+  > li {
+    float: none;
+    > a {
+      text-align: center;
+      margin-bottom: 5px;
+    }
+  }
+
+  > .dropdown .dropdown-menu {
+    top: auto;
+    left: auto;
+  }
+
+  @media (min-width: @screen-sm-min) {
+    > li {
+      display: table-cell;
+      width: 1%;
+      > a {
+        margin-bottom: 0;
+      }
+    }
+  }
+}
+
+// Move borders to anchors instead of bottom of list
+//
+// Mixin for adding on top the shared `.nav-justified` styles for our tabs
+.nav-tabs-justified {
+  border-bottom: 0;
+
+  > li > a {
+    // Override margin from .nav-tabs
+    margin-right: 0;
+    border-radius: @border-radius-base;
+  }
+
+  > .active > a,
+  > .active > a:hover,
+  > .active > a:focus {
+    border: 1px solid @nav-tabs-justified-link-border-color;
+  }
+
+  @media (min-width: @screen-sm-min) {
+    > li > a {
+      border-bottom: 1px solid @nav-tabs-justified-link-border-color;
+      border-radius: @border-radius-base @border-radius-base 0 0;
+    }
+    > .active > a,
+    > .active > a:hover,
+    > .active > a:focus {
+      border-bottom-color: @nav-tabs-justified-active-link-border-color;
+    }
+  }
+}
+
+
+// Tabbable tabs
+// -------------------------
+
+// Hide tabbable panes to start, show them when `.active`
+.tab-content {
+  > .tab-pane {
+    display: none;
+  }
+  > .active {
+    display: block;
+  }
+}
+
+
+// Dropdowns
+// -------------------------
+
+// Specific dropdowns
+.nav-tabs .dropdown-menu {
+  // make dropdown border overlap tab border
+  margin-top: -1px;
+  // Remove the top rounded corners here since there is a hard edge above the menu
+  .border-top-radius(0);
+}
diff --git a/3rdparty/fmt/doc/bootstrap/normalize.less b/3rdparty/fmt/doc/bootstrap/normalize.less
new file mode 100644
index 00000000..62a085a4
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/normalize.less
@@ -0,0 +1,427 @@
+/*! normalize.css v3.0.2 | MIT License | git.io/normalize */
+
+//
+// 1. Set default font family to sans-serif.
+// 2. Prevent iOS text size adjust after orientation change, without disabling
+//    user zoom.
+//
+
+html {
+  font-family: sans-serif; // 1
+  -ms-text-size-adjust: 100%; // 2
+  -webkit-text-size-adjust: 100%; // 2
+}
+
+//
+// Remove default margin.
+//
+
+body {
+  margin: 0;
+}
+
+// HTML5 display definitions
+// ==========================================================================
+
+//
+// Correct `block` display not defined for any HTML5 element in IE 8/9.
+// Correct `block` display not defined for `details` or `summary` in IE 10/11
+// and Firefox.
+// Correct `block` display not defined for `main` in IE 11.
+//
+
+article,
+aside,
+details,
+figcaption,
+figure,
+footer,
+header,
+hgroup,
+main,
+menu,
+nav,
+section,
+summary {
+  display: block;
+}
+
+//
+// 1. Correct `inline-block` display not defined in IE 8/9.
+// 2. Normalize vertical alignment of `progress` in Chrome, Firefox, and Opera.
+//
+
+audio,
+canvas,
+progress,
+video {
+  display: inline-block; // 1
+  vertical-align: baseline; // 2
+}
+
+//
+// Prevent modern browsers from displaying `audio` without controls.
+// Remove excess height in iOS 5 devices.
+//
+
+audio:not([controls]) {
+  display: none;
+  height: 0;
+}
+
+//
+// Address `[hidden]` styling not present in IE 8/9/10.
+// Hide the `template` element in IE 8/9/11, Safari, and Firefox < 22.
+//
+
+[hidden],
+template {
+  display: none;
+}
+
+// Links
+// ==========================================================================
+
+//
+// Remove the gray background color from active links in IE 10.
+//
+
+a {
+  background-color: transparent;
+}
+
+//
+// Improve readability when focused and also mouse hovered in all browsers.
+//
+
+a:active,
+a:hover {
+  outline: 0;
+}
+
+// Text-level semantics
+// ==========================================================================
+
+//
+// Address styling not present in IE 8/9/10/11, Safari, and Chrome.
+//
+
+abbr[title] {
+  border-bottom: 1px dotted;
+}
+
+//
+// Address style set to `bolder` in Firefox 4+, Safari, and Chrome.
+//
+
+b,
+strong {
+  font-weight: bold;
+}
+
+//
+// Address styling not present in Safari and Chrome.
+//
+
+dfn {
+  font-style: italic;
+}
+
+//
+// Address variable `h1` font-size and margin within `section` and `article`
+// contexts in Firefox 4+, Safari, and Chrome.
+//
+
+h1 {
+  font-size: 2em;
+  margin: 0.67em 0;
+}
+
+//
+// Address styling not present in IE 8/9.
+//
+
+mark {
+  background: #ff0;
+  color: #000;
+}
+
+//
+// Address inconsistent and variable font size in all browsers.
+//
+
+small {
+  font-size: 80%;
+}
+
+//
+// Prevent `sub` and `sup` affecting `line-height` in all browsers.
+//
+
+sub,
+sup {
+  font-size: 75%;
+  line-height: 0;
+  position: relative;
+  vertical-align: baseline;
+}
+
+sup {
+  top: -0.5em;
+}
+
+sub {
+  bottom: -0.25em;
+}
+
+// Embedded content
+// ==========================================================================
+
+//
+// Remove border when inside `a` element in IE 8/9/10.
+//
+
+img {
+  border: 0;
+}
+
+//
+// Correct overflow not hidden in IE 9/10/11.
+//
+
+svg:not(:root) {
+  overflow: hidden;
+}
+
+// Grouping content
+// ==========================================================================
+
+//
+// Address margin not present in IE 8/9 and Safari.
+//
+
+figure {
+  margin: 1em 40px;
+}
+
+//
+// Address differences between Firefox and other browsers.
+//
+
+hr {
+  -moz-box-sizing: content-box;
+  box-sizing: content-box;
+  height: 0;
+}
+
+//
+// Contain overflow in all browsers.
+//
+
+pre {
+  overflow: auto;
+}
+
+//
+// Address odd `em`-unit font size rendering in all browsers.
+//
+
+code,
+kbd,
+pre,
+samp {
+  font-family: monospace, monospace;
+  font-size: 1em;
+}
+
+// Forms
+// ==========================================================================
+
+//
+// Known limitation: by default, Chrome and Safari on OS X allow very limited
+// styling of `select`, unless a `border` property is set.
+//
+
+//
+// 1. Correct color not being inherited.
+//    Known issue: affects color of disabled elements.
+// 2. Correct font properties not being inherited.
+// 3. Address margins set differently in Firefox 4+, Safari, and Chrome.
+//
+
+button,
+input,
+optgroup,
+select,
+textarea {
+  color: inherit; // 1
+  font: inherit; // 2
+  margin: 0; // 3
+}
+
+//
+// Address `overflow` set to `hidden` in IE 8/9/10/11.
+//
+
+button {
+  overflow: visible;
+}
+
+//
+// Address inconsistent `text-transform` inheritance for `button` and `select`.
+// All other form control elements do not inherit `text-transform` values.
+// Correct `button` style inheritance in Firefox, IE 8/9/10/11, and Opera.
+// Correct `select` style inheritance in Firefox.
+//
+
+button,
+select {
+  text-transform: none;
+}
+
+//
+// 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
+//    and `video` controls.
+// 2. Correct inability to style clickable `input` types in iOS.
+// 3. Improve usability and consistency of cursor style between image-type
+//    `input` and others.
+//
+
+button,
+html input[type="button"], // 1
+input[type="reset"],
+input[type="submit"] {
+  -webkit-appearance: button; // 2
+  cursor: pointer; // 3
+}
+
+//
+// Re-set default cursor for disabled elements.
+//
+
+button[disabled],
+html input[disabled] {
+  cursor: default;
+}
+
+//
+// Remove inner padding and border in Firefox 4+.
+//
+
+button::-moz-focus-inner,
+input::-moz-focus-inner {
+  border: 0;
+  padding: 0;
+}
+
+//
+// Address Firefox 4+ setting `line-height` on `input` using `!important` in
+// the UA stylesheet.
+//
+
+input {
+  line-height: normal;
+}
+
+//
+// It's recommended that you don't attempt to style these elements.
+// Firefox's implementation doesn't respect box-sizing, padding, or width.
+//
+// 1. Address box sizing set to `content-box` in IE 8/9/10.
+// 2. Remove excess padding in IE 8/9/10.
+//
+
+input[type="checkbox"],
+input[type="radio"] {
+  box-sizing: border-box; // 1
+  padding: 0; // 2
+}
+
+//
+// Fix the cursor style for Chrome's increment/decrement buttons. For certain
+// `font-size` values of the `input`, it causes the cursor style of the
+// decrement button to change from `default` to `text`.
+//
+
+input[type="number"]::-webkit-inner-spin-button,
+input[type="number"]::-webkit-outer-spin-button {
+  height: auto;
+}
+
+//
+// 1. Address `appearance` set to `searchfield` in Safari and Chrome.
+// 2. Address `box-sizing` set to `border-box` in Safari and Chrome
+//    (include `-moz` to future-proof).
+//
+
+input[type="search"] {
+  -webkit-appearance: textfield; // 1
+  -moz-box-sizing: content-box;
+  -webkit-box-sizing: content-box; // 2
+  box-sizing: content-box;
+}
+
+//
+// Remove inner padding and search cancel button in Safari and Chrome on OS X.
+// Safari (but not Chrome) clips the cancel button when the search input has
+// padding (and `textfield` appearance).
+//
+
+input[type="search"]::-webkit-search-cancel-button,
+input[type="search"]::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+//
+// Define consistent border, margin, and padding.
+//
+
+fieldset {
+  border: 1px solid #c0c0c0;
+  margin: 0 2px;
+  padding: 0.35em 0.625em 0.75em;
+}
+
+//
+// 1. Correct `color` not being inherited in IE 8/9/10/11.
+// 2. Remove padding so people aren't caught out if they zero out fieldsets.
+//
+
+legend {
+  border: 0; // 1
+  padding: 0; // 2
+}
+
+//
+// Remove default vertical scrollbar in IE 8/9/10/11.
+//
+
+textarea {
+  overflow: auto;
+}
+
+//
+// Don't inherit the `font-weight` (applied by a rule above).
+// NOTE: the default cannot safely be changed in Chrome and Safari on OS X.
+//
+
+optgroup {
+  font-weight: bold;
+}
+
+// Tables
+// ==========================================================================
+
+//
+// Remove most spacing between table cells.
+//
+
+table {
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+td,
+th {
+  padding: 0;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/pager.less b/3rdparty/fmt/doc/bootstrap/pager.less
new file mode 100644
index 00000000..41abaaad
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/pager.less
@@ -0,0 +1,54 @@
+//
+// Pager pagination
+// --------------------------------------------------
+
+
+.pager {
+  padding-left: 0;
+  margin: @line-height-computed 0;
+  list-style: none;
+  text-align: center;
+  &:extend(.clearfix all);
+  li {
+    display: inline;
+    > a,
+    > span {
+      display: inline-block;
+      padding: 5px 14px;
+      background-color: @pager-bg;
+      border: 1px solid @pager-border;
+      border-radius: @pager-border-radius;
+    }
+
+    > a:hover,
+    > a:focus {
+      text-decoration: none;
+      background-color: @pager-hover-bg;
+    }
+  }
+
+  .next {
+    > a,
+    > span {
+      float: right;
+    }
+  }
+
+  .previous {
+    > a,
+    > span {
+      float: left;
+    }
+  }
+
+  .disabled {
+    > a,
+    > a:hover,
+    > a:focus,
+    > span {
+      color: @pager-disabled-color;
+      background-color: @pager-bg;
+      cursor: @cursor-disabled;
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/pagination.less b/3rdparty/fmt/doc/bootstrap/pagination.less
new file mode 100644
index 00000000..38c4c3d3
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/pagination.less
@@ -0,0 +1,88 @@
+//
+// Pagination (multiple pages)
+// --------------------------------------------------
+.pagination {
+  display: inline-block;
+  padding-left: 0;
+  margin: @line-height-computed 0;
+  border-radius: @border-radius-base;
+
+  > li {
+    display: inline; // Remove list-style and block-level defaults
+    > a,
+    > span {
+      position: relative;
+      float: left; // Collapse white-space
+      padding: @padding-base-vertical @padding-base-horizontal;
+      line-height: @line-height-base;
+      text-decoration: none;
+      color: @pagination-color;
+      background-color: @pagination-bg;
+      border: 1px solid @pagination-border;
+      margin-left: -1px;
+    }
+    &:first-child {
+      > a,
+      > span {
+        margin-left: 0;
+        .border-left-radius(@border-radius-base);
+      }
+    }
+    &:last-child {
+      > a,
+      > span {
+        .border-right-radius(@border-radius-base);
+      }
+    }
+  }
+
+  > li > a,
+  > li > span {
+    &:hover,
+    &:focus {
+      color: @pagination-hover-color;
+      background-color: @pagination-hover-bg;
+      border-color: @pagination-hover-border;
+    }
+  }
+
+  > .active > a,
+  > .active > span {
+    &,
+    &:hover,
+    &:focus {
+      z-index: 2;
+      color: @pagination-active-color;
+      background-color: @pagination-active-bg;
+      border-color: @pagination-active-border;
+      cursor: default;
+    }
+  }
+
+  > .disabled {
+    > span,
+    > span:hover,
+    > span:focus,
+    > a,
+    > a:hover,
+    > a:focus {
+      color: @pagination-disabled-color;
+      background-color: @pagination-disabled-bg;
+      border-color: @pagination-disabled-border;
+      cursor: @cursor-disabled;
+    }
+  }
+}
+
+// Sizing
+// --------------------------------------------------
+
+// Large
+.pagination-lg {
+  .pagination-size(@padding-large-vertical; @padding-large-horizontal; @font-size-large; @border-radius-large);
+}
+
+// Small
+.pagination-sm {
+  .pagination-size(@padding-small-vertical; @padding-small-horizontal; @font-size-small; @border-radius-small);
+}
diff --git a/3rdparty/fmt/doc/bootstrap/panels.less b/3rdparty/fmt/doc/bootstrap/panels.less
new file mode 100644
index 00000000..04eb2b39
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/panels.less
@@ -0,0 +1,265 @@
+//
+// Panels
+// --------------------------------------------------
+
+
+// Base class
+.panel {
+  margin-bottom: @line-height-computed;
+  background-color: @panel-bg;
+  border: 1px solid transparent;
+  border-radius: @panel-border-radius;
+  .box-shadow(0 1px 1px rgba(0,0,0,.05));
+}
+
+// Panel contents
+.panel-body {
+  padding: @panel-body-padding;
+  &:extend(.clearfix all);
+}
+
+// Optional heading
+.panel-heading {
+  padding: @panel-heading-padding;
+  border-bottom: 1px solid transparent;
+  .border-top-radius((@panel-border-radius - 1));
+
+  > .dropdown .dropdown-toggle {
+    color: inherit;
+  }
+}
+
+// Within heading, strip any `h*` tag of its default margins for spacing.
+.panel-title {
+  margin-top: 0;
+  margin-bottom: 0;
+  font-size: ceil((@font-size-base * 1.125));
+  color: inherit;
+
+  > a,
+  > small,
+  > .small,
+  > small > a,
+  > .small > a {
+    color: inherit;
+  }
+}
+
+// Optional footer (stays gray in every modifier class)
+.panel-footer {
+  padding: @panel-footer-padding;
+  background-color: @panel-footer-bg;
+  border-top: 1px solid @panel-inner-border;
+  .border-bottom-radius((@panel-border-radius - 1));
+}
+
+
+// List groups in panels
+//
+// By default, space out list group content from panel headings to account for
+// any kind of custom content between the two.
+
+.panel {
+  > .list-group,
+  > .panel-collapse > .list-group {
+    margin-bottom: 0;
+
+    .list-group-item {
+      border-width: 1px 0;
+      border-radius: 0;
+    }
+
+    // Add border top radius for first one
+    &:first-child {
+      .list-group-item:first-child {
+        border-top: 0;
+        .border-top-radius((@panel-border-radius - 1));
+      }
+    }
+    // Add border bottom radius for last one
+    &:last-child {
+      .list-group-item:last-child {
+        border-bottom: 0;
+        .border-bottom-radius((@panel-border-radius - 1));
+      }
+    }
+  }
+}
+// Collapse space between when there's no additional content.
+.panel-heading + .list-group {
+  .list-group-item:first-child {
+    border-top-width: 0;
+  }
+}
+.list-group + .panel-footer {
+  border-top-width: 0;
+}
+
+// Tables in panels
+//
+// Place a non-bordered `.table` within a panel (not within a `.panel-body`) and
+// watch it go full width.
+
+.panel {
+  > .table,
+  > .table-responsive > .table,
+  > .panel-collapse > .table {
+    margin-bottom: 0;
+
+    caption {
+      padding-left: @panel-body-padding;
+      padding-right: @panel-body-padding;
+    }
+  }
+  // Add border top radius for first one
+  > .table:first-child,
+  > .table-responsive:first-child > .table:first-child {
+    .border-top-radius((@panel-border-radius - 1));
+
+    > thead:first-child,
+    > tbody:first-child {
+      > tr:first-child {
+        border-top-left-radius: (@panel-border-radius - 1);
+        border-top-right-radius: (@panel-border-radius - 1);
+
+        td:first-child,
+        th:first-child {
+          border-top-left-radius: (@panel-border-radius - 1);
+        }
+        td:last-child,
+        th:last-child {
+          border-top-right-radius: (@panel-border-radius - 1);
+        }
+      }
+    }
+  }
+  // Add border bottom radius for last one
+  > .table:last-child,
+  > .table-responsive:last-child > .table:last-child {
+    .border-bottom-radius((@panel-border-radius - 1));
+
+    > tbody:last-child,
+    > tfoot:last-child {
+      > tr:last-child {
+        border-bottom-left-radius: (@panel-border-radius - 1);
+        border-bottom-right-radius: (@panel-border-radius - 1);
+
+        td:first-child,
+        th:first-child {
+          border-bottom-left-radius: (@panel-border-radius - 1);
+        }
+        td:last-child,
+        th:last-child {
+          border-bottom-right-radius: (@panel-border-radius - 1);
+        }
+      }
+    }
+  }
+  > .panel-body + .table,
+  > .panel-body + .table-responsive,
+  > .table + .panel-body,
+  > .table-responsive + .panel-body {
+    border-top: 1px solid @table-border-color;
+  }
+  > .table > tbody:first-child > tr:first-child th,
+  > .table > tbody:first-child > tr:first-child td {
+    border-top: 0;
+  }
+  > .table-bordered,
+  > .table-responsive > .table-bordered {
+    border: 0;
+    > thead,
+    > tbody,
+    > tfoot {
+      > tr {
+        > th:first-child,
+        > td:first-child {
+          border-left: 0;
+        }
+        > th:last-child,
+        > td:last-child {
+          border-right: 0;
+        }
+      }
+    }
+    > thead,
+    > tbody {
+      > tr:first-child {
+        > td,
+        > th {
+          border-bottom: 0;
+        }
+      }
+    }
+    > tbody,
+    > tfoot {
+      > tr:last-child {
+        > td,
+        > th {
+          border-bottom: 0;
+        }
+      }
+    }
+  }
+  > .table-responsive {
+    border: 0;
+    margin-bottom: 0;
+  }
+}
+
+
+// Collapsable panels (aka, accordion)
+//
+// Wrap a series of panels in `.panel-group` to turn them into an accordion with
+// the help of our collapse JavaScript plugin.
+
+.panel-group {
+  margin-bottom: @line-height-computed;
+
+  // Tighten up margin so it's only between panels
+  .panel {
+    margin-bottom: 0;
+    border-radius: @panel-border-radius;
+
+    + .panel {
+      margin-top: 5px;
+    }
+  }
+
+  .panel-heading {
+    border-bottom: 0;
+
+    + .panel-collapse > .panel-body,
+    + .panel-collapse > .list-group {
+      border-top: 1px solid @panel-inner-border;
+    }
+  }
+
+  .panel-footer {
+    border-top: 0;
+    + .panel-collapse .panel-body {
+      border-bottom: 1px solid @panel-inner-border;
+    }
+  }
+}
+
+
+// Contextual variations
+.panel-default {
+  .panel-variant(@panel-default-border; @panel-default-text; @panel-default-heading-bg; @panel-default-border);
+}
+.panel-primary {
+  .panel-variant(@panel-primary-border; @panel-primary-text; @panel-primary-heading-bg; @panel-primary-border);
+}
+.panel-success {
+  .panel-variant(@panel-success-border; @panel-success-text; @panel-success-heading-bg; @panel-success-border);
+}
+.panel-info {
+  .panel-variant(@panel-info-border; @panel-info-text; @panel-info-heading-bg; @panel-info-border);
+}
+.panel-warning {
+  .panel-variant(@panel-warning-border; @panel-warning-text; @panel-warning-heading-bg; @panel-warning-border);
+}
+.panel-danger {
+  .panel-variant(@panel-danger-border; @panel-danger-text; @panel-danger-heading-bg; @panel-danger-border);
+}
diff --git a/3rdparty/fmt/doc/bootstrap/popovers.less b/3rdparty/fmt/doc/bootstrap/popovers.less
new file mode 100644
index 00000000..2748eead
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/popovers.less
@@ -0,0 +1,135 @@
+//
+// Popovers
+// --------------------------------------------------
+
+
+.popover {
+  position: absolute;
+  top: 0;
+  left: 0;
+  z-index: @zindex-popover;
+  display: none;
+  max-width: @popover-max-width;
+  padding: 1px;
+  // Reset font and text properties given new insertion method
+  font-family: @font-family-base;
+  font-size: @font-size-base;
+  font-weight: normal;
+  line-height: @line-height-base;
+  text-align: left;
+  background-color: @popover-bg;
+  background-clip: padding-box;
+  border: 1px solid @popover-fallback-border-color;
+  border: 1px solid @popover-border-color;
+  border-radius: @border-radius-large;
+  .box-shadow(0 5px 10px rgba(0,0,0,.2));
+
+  // Overrides for proper insertion
+  white-space: normal;
+
+  // Offset the popover to account for the popover arrow
+  &.top     { margin-top: -@popover-arrow-width; }
+  &.right   { margin-left: @popover-arrow-width; }
+  &.bottom  { margin-top: @popover-arrow-width; }
+  &.left    { margin-left: -@popover-arrow-width; }
+}
+
+.popover-title {
+  margin: 0; // reset heading margin
+  padding: 8px 14px;
+  font-size: @font-size-base;
+  background-color: @popover-title-bg;
+  border-bottom: 1px solid darken(@popover-title-bg, 5%);
+  border-radius: (@border-radius-large - 1) (@border-radius-large - 1) 0 0;
+}
+
+.popover-content {
+  padding: 9px 14px;
+}
+
+// Arrows
+//
+// .arrow is outer, .arrow:after is inner
+
+.popover > .arrow {
+  &,
+  &:after {
+    position: absolute;
+    display: block;
+    width: 0;
+    height: 0;
+    border-color: transparent;
+    border-style: solid;
+  }
+}
+.popover > .arrow {
+  border-width: @popover-arrow-outer-width;
+}
+.popover > .arrow:after {
+  border-width: @popover-arrow-width;
+  content: "";
+}
+
+.popover {
+  &.top > .arrow {
+    left: 50%;
+    margin-left: -@popover-arrow-outer-width;
+    border-bottom-width: 0;
+    border-top-color: @popover-arrow-outer-fallback-color; // IE8 fallback
+    border-top-color: @popover-arrow-outer-color;
+    bottom: -@popover-arrow-outer-width;
+    &:after {
+      content: " ";
+      bottom: 1px;
+      margin-left: -@popover-arrow-width;
+      border-bottom-width: 0;
+      border-top-color: @popover-arrow-color;
+    }
+  }
+  &.right > .arrow {
+    top: 50%;
+    left: -@popover-arrow-outer-width;
+    margin-top: -@popover-arrow-outer-width;
+    border-left-width: 0;
+    border-right-color: @popover-arrow-outer-fallback-color; // IE8 fallback
+    border-right-color: @popover-arrow-outer-color;
+    &:after {
+      content: " ";
+      left: 1px;
+      bottom: -@popover-arrow-width;
+      border-left-width: 0;
+      border-right-color: @popover-arrow-color;
+    }
+  }
+  &.bottom > .arrow {
+    left: 50%;
+    margin-left: -@popover-arrow-outer-width;
+    border-top-width: 0;
+    border-bottom-color: @popover-arrow-outer-fallback-color; // IE8 fallback
+    border-bottom-color: @popover-arrow-outer-color;
+    top: -@popover-arrow-outer-width;
+    &:after {
+      content: " ";
+      top: 1px;
+      margin-left: -@popover-arrow-width;
+      border-top-width: 0;
+      border-bottom-color: @popover-arrow-color;
+    }
+  }
+
+  &.left > .arrow {
+    top: 50%;
+    right: -@popover-arrow-outer-width;
+    margin-top: -@popover-arrow-outer-width;
+    border-right-width: 0;
+    border-left-color: @popover-arrow-outer-fallback-color; // IE8 fallback
+    border-left-color: @popover-arrow-outer-color;
+    &:after {
+      content: " ";
+      right: 1px;
+      border-right-width: 0;
+      border-left-color: @popover-arrow-color;
+      bottom: -@popover-arrow-width;
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/print.less b/3rdparty/fmt/doc/bootstrap/print.less
new file mode 100644
index 00000000..94ca58f1
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/print.less
@@ -0,0 +1,107 @@
+/*! Source: https://github.com/h5bp/html5-boilerplate/blob/master/src/css/main.css */
+
+// ==========================================================================
+// Print styles.
+// Inlined to avoid the additional HTTP request: h5bp.com/r
+// ==========================================================================
+
+@media print {
+    *,
+    *:before,
+    *:after {
+        background: transparent !important;
+        color: #000 !important; // Black prints faster: h5bp.com/s
+        box-shadow: none !important;
+        text-shadow: none !important;
+    }
+
+    a,
+    a:visited {
+        text-decoration: underline;
+    }
+
+    a[href]:after {
+        content: " (" attr(href) ")";
+    }
+
+    abbr[title]:after {
+        content: " (" attr(title) ")";
+    }
+
+    // Don't show links that are fragment identifiers,
+    // or use the `javascript:` pseudo protocol
+    a[href^="#"]:after,
+    a[href^="javascript:"]:after {
+        content: "";
+    }
+
+    pre,
+    blockquote {
+        border: 1px solid #999;
+        page-break-inside: avoid;
+    }
+
+    thead {
+        display: table-header-group; // h5bp.com/t
+    }
+
+    tr,
+    img {
+        page-break-inside: avoid;
+    }
+
+    img {
+        max-width: 100% !important;
+    }
+
+    p,
+    h2,
+    h3 {
+        orphans: 3;
+        widows: 3;
+    }
+
+    h2,
+    h3 {
+        page-break-after: avoid;
+    }
+
+    // Bootstrap specific changes start
+    //
+    // Chrome (OSX) fix for https://github.com/twbs/bootstrap/issues/11245
+    // Once fixed, we can just straight up remove this.
+    select {
+        background: #fff !important;
+    }
+
+    // Bootstrap components
+    .navbar {
+        display: none;
+    }
+    .btn,
+    .dropup > .btn {
+        > .caret {
+            border-top-color: #000 !important;
+        }
+    }
+    .label {
+        border: 1px solid #000;
+    }
+
+    .table {
+        border-collapse: collapse !important;
+
+        td,
+        th {
+            background-color: #fff !important;
+        }
+    }
+    .table-bordered {
+        th,
+        td {
+            border: 1px solid #ddd !important;
+        }
+    }
+
+    // Bootstrap specific changes end
+}
diff --git a/3rdparty/fmt/doc/bootstrap/progress-bars.less b/3rdparty/fmt/doc/bootstrap/progress-bars.less
new file mode 100644
index 00000000..8868a1fe
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/progress-bars.less
@@ -0,0 +1,87 @@
+//
+// Progress bars
+// --------------------------------------------------
+
+
+// Bar animations
+// -------------------------
+
+// WebKit
+@-webkit-keyframes progress-bar-stripes {
+  from  { background-position: 40px 0; }
+  to    { background-position: 0 0; }
+}
+
+// Spec and IE10+
+@keyframes progress-bar-stripes {
+  from  { background-position: 40px 0; }
+  to    { background-position: 0 0; }
+}
+
+
+// Bar itself
+// -------------------------
+
+// Outer container
+.progress {
+  overflow: hidden;
+  height: @line-height-computed;
+  margin-bottom: @line-height-computed;
+  background-color: @progress-bg;
+  border-radius: @progress-border-radius;
+  .box-shadow(inset 0 1px 2px rgba(0,0,0,.1));
+}
+
+// Bar of progress
+.progress-bar {
+  float: left;
+  width: 0%;
+  height: 100%;
+  font-size: @font-size-small;
+  line-height: @line-height-computed;
+  color: @progress-bar-color;
+  text-align: center;
+  background-color: @progress-bar-bg;
+  .box-shadow(inset 0 -1px 0 rgba(0,0,0,.15));
+  .transition(width .6s ease);
+}
+
+// Striped bars
+//
+// `.progress-striped .progress-bar` is deprecated as of v3.2.0 in favor of the
+// `.progress-bar-striped` class, which you just add to an existing
+// `.progress-bar`.
+.progress-striped .progress-bar,
+.progress-bar-striped {
+  #gradient > .striped();
+  background-size: 40px 40px;
+}
+
+// Call animation for the active one
+//
+// `.progress.active .progress-bar` is deprecated as of v3.2.0 in favor of the
+// `.progress-bar.active` approach.
+.progress.active .progress-bar,
+.progress-bar.active {
+  .animation(progress-bar-stripes 2s linear infinite);
+}
+
+
+// Variations
+// -------------------------
+
+.progress-bar-success {
+  .progress-bar-variant(@progress-bar-success-bg);
+}
+
+.progress-bar-info {
+  .progress-bar-variant(@progress-bar-info-bg);
+}
+
+.progress-bar-warning {
+  .progress-bar-variant(@progress-bar-warning-bg);
+}
+
+.progress-bar-danger {
+  .progress-bar-variant(@progress-bar-danger-bg);
+}
diff --git a/3rdparty/fmt/doc/bootstrap/responsive-embed.less b/3rdparty/fmt/doc/bootstrap/responsive-embed.less
new file mode 100644
index 00000000..080a5118
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/responsive-embed.less
@@ -0,0 +1,35 @@
+// Embeds responsive
+//
+// Credit: Nicolas Gallagher and SUIT CSS.
+
+.embed-responsive {
+  position: relative;
+  display: block;
+  height: 0;
+  padding: 0;
+  overflow: hidden;
+
+  .embed-responsive-item,
+  iframe,
+  embed,
+  object,
+  video {
+    position: absolute;
+    top: 0;
+    left: 0;
+    bottom: 0;
+    height: 100%;
+    width: 100%;
+    border: 0;
+  }
+}
+
+// Modifier class for 16:9 aspect ratio
+.embed-responsive-16by9 {
+  padding-bottom: 56.25%;
+}
+
+// Modifier class for 4:3 aspect ratio
+.embed-responsive-4by3 {
+  padding-bottom: 75%;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/responsive-utilities.less b/3rdparty/fmt/doc/bootstrap/responsive-utilities.less
new file mode 100644
index 00000000..b1db31d7
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/responsive-utilities.less
@@ -0,0 +1,194 @@
+//
+// Responsive: Utility classes
+// --------------------------------------------------
+
+
+// IE10 in Windows (Phone) 8
+//
+// Support for responsive views via media queries is kind of borked in IE10, for
+// Surface/desktop in split view and for Windows Phone 8. This particular fix
+// must be accompanied by a snippet of JavaScript to sniff the user agent and
+// apply some conditional CSS to *only* the Surface/desktop Windows 8. Look at
+// our Getting Started page for more information on this bug.
+//
+// For more information, see the following:
+//
+// Issue: https://github.com/twbs/bootstrap/issues/10497
+// Docs: http://getbootstrap.com/getting-started/#support-ie10-width
+// Source: http://timkadlec.com/2013/01/windows-phone-8-and-device-width/
+// Source: http://timkadlec.com/2012/10/ie10-snap-mode-and-responsive-design/
+
+@-ms-viewport {
+  width: device-width;
+}
+
+
+// Visibility utilities
+// Note: Deprecated .visible-xs, .visible-sm, .visible-md, and .visible-lg as of v3.2.0
+.visible-xs,
+.visible-sm,
+.visible-md,
+.visible-lg {
+  .responsive-invisibility();
+}
+
+.visible-xs-block,
+.visible-xs-inline,
+.visible-xs-inline-block,
+.visible-sm-block,
+.visible-sm-inline,
+.visible-sm-inline-block,
+.visible-md-block,
+.visible-md-inline,
+.visible-md-inline-block,
+.visible-lg-block,
+.visible-lg-inline,
+.visible-lg-inline-block {
+  display: none !important;
+}
+
+.visible-xs {
+  @media (max-width: @screen-xs-max) {
+    .responsive-visibility();
+  }
+}
+.visible-xs-block {
+  @media (max-width: @screen-xs-max) {
+    display: block !important;
+  }
+}
+.visible-xs-inline {
+  @media (max-width: @screen-xs-max) {
+    display: inline !important;
+  }
+}
+.visible-xs-inline-block {
+  @media (max-width: @screen-xs-max) {
+    display: inline-block !important;
+  }
+}
+
+.visible-sm {
+  @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
+    .responsive-visibility();
+  }
+}
+.visible-sm-block {
+  @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
+    display: block !important;
+  }
+}
+.visible-sm-inline {
+  @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
+    display: inline !important;
+  }
+}
+.visible-sm-inline-block {
+  @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
+    display: inline-block !important;
+  }
+}
+
+.visible-md {
+  @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
+    .responsive-visibility();
+  }
+}
+.visible-md-block {
+  @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
+    display: block !important;
+  }
+}
+.visible-md-inline {
+  @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
+    display: inline !important;
+  }
+}
+.visible-md-inline-block {
+  @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
+    display: inline-block !important;
+  }
+}
+
+.visible-lg {
+  @media (min-width: @screen-lg-min) {
+    .responsive-visibility();
+  }
+}
+.visible-lg-block {
+  @media (min-width: @screen-lg-min) {
+    display: block !important;
+  }
+}
+.visible-lg-inline {
+  @media (min-width: @screen-lg-min) {
+    display: inline !important;
+  }
+}
+.visible-lg-inline-block {
+  @media (min-width: @screen-lg-min) {
+    display: inline-block !important;
+  }
+}
+
+.hidden-xs {
+  @media (max-width: @screen-xs-max) {
+    .responsive-invisibility();
+  }
+}
+.hidden-sm {
+  @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
+    .responsive-invisibility();
+  }
+}
+.hidden-md {
+  @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
+    .responsive-invisibility();
+  }
+}
+.hidden-lg {
+  @media (min-width: @screen-lg-min) {
+    .responsive-invisibility();
+  }
+}
+
+
+// Print utilities
+//
+// Media queries are placed on the inside to be mixin-friendly.
+
+// Note: Deprecated .visible-print as of v3.2.0
+.visible-print {
+  .responsive-invisibility();
+
+  @media print {
+    .responsive-visibility();
+  }
+}
+.visible-print-block {
+  display: none !important;
+
+  @media print {
+    display: block !important;
+  }
+}
+.visible-print-inline {
+  display: none !important;
+
+  @media print {
+    display: inline !important;
+  }
+}
+.visible-print-inline-block {
+  display: none !important;
+
+  @media print {
+    display: inline-block !important;
+  }
+}
+
+.hidden-print {
+  @media print {
+    .responsive-invisibility();
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/scaffolding.less b/3rdparty/fmt/doc/bootstrap/scaffolding.less
new file mode 100644
index 00000000..47b1d5a1
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/scaffolding.less
@@ -0,0 +1,162 @@
+//
+// Scaffolding
+// --------------------------------------------------
+
+
+// Reset the box-sizing
+//
+// Heads up! This reset may cause conflicts with some third-party widgets.
+// For recommendations on resolving such conflicts, see
+// http://getbootstrap.com/getting-started/#third-box-sizing
+* {
+  .box-sizing(border-box);
+}
+*:before,
+*:after {
+  .box-sizing(border-box);
+}
+
+
+// Body reset
+
+html {
+  font-size: 10px;
+  -webkit-tap-highlight-color: rgba(0,0,0,0);
+}
+
+body {
+  font-family: @font-family-base;
+  font-size: @font-size-base;
+  line-height: @line-height-base;
+  color: @text-color;
+  background-color: @body-bg;
+}
+
+// Reset fonts for relevant elements
+input,
+button,
+select,
+textarea {
+  font-family: inherit;
+  font-size: inherit;
+  line-height: inherit;
+}
+
+
+// Links
+
+a {
+  color: @link-color;
+  text-decoration: none;
+
+  &:hover,
+  &:focus {
+    color: @link-hover-color;
+    text-decoration: @link-hover-decoration;
+  }
+
+  &:focus {
+    .tab-focus();
+  }
+}
+
+
+// Figures
+//
+// We reset this here because previously Normalize had no `figure` margins. This
+// ensures we don't break anyone's use of the element.
+
+figure {
+  margin: 0;
+}
+
+
+// Images
+
+img {
+  vertical-align: middle;
+}
+
+// Responsive images (ensure images don't scale beyond their parents)
+.img-responsive {
+  .img-responsive();
+}
+
+// Rounded corners
+.img-rounded {
+  border-radius: @border-radius-large;
+}
+
+// Image thumbnails
+//
+// Heads up! This is mixin-ed into thumbnails.less for `.thumbnail`.
+.img-thumbnail {
+  padding: @thumbnail-padding;
+  line-height: @line-height-base;
+  background-color: @thumbnail-bg;
+  border: 1px solid @thumbnail-border;
+  border-radius: @thumbnail-border-radius;
+  .transition(all .2s ease-in-out);
+
+  // Keep them at most 100% wide
+  .img-responsive(inline-block);
+}
+
+// Perfect circle
+.img-circle {
+  border-radius: 50%; // set radius in percents
+}
+
+
+// Horizontal rules
+
+hr {
+  margin-top:    @line-height-computed;
+  margin-bottom: @line-height-computed;
+  border: 0;
+  border-top: 1px solid @hr-border;
+}
+
+
+// Only display content to screen readers
+//
+// See: http://a11yproject.com/posts/how-to-hide-content/
+
+.sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  margin: -1px;
+  padding: 0;
+  overflow: hidden;
+  clip: rect(0,0,0,0);
+  border: 0;
+}
+
+// Use in conjunction with .sr-only to only display content when it's focused.
+// Useful for "Skip to main content" links; see http://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1
+// Credit: HTML5 Boilerplate
+
+.sr-only-focusable {
+  &:active,
+  &:focus {
+    position: static;
+    width: auto;
+    height: auto;
+    margin: 0;
+    overflow: visible;
+    clip: auto;
+  }
+}
+
+
+// iOS "clickable elements" fix for role="button"
+//
+// Fixes "clickability" issue (and more generally, the firing of events such as focus as well)
+// for traditionally non-focusable elements with role="button"
+// see https://developer.mozilla.org/en-US/docs/Web/Events/click#Safari_Mobile
+// Upstream patch for normalize.css submitted: https://github.com/necolas/normalize.css/pull/379 - remove this fix once that is merged
+
+[role="button"] {
+  cursor: pointer;
+}
\ No newline at end of file
diff --git a/3rdparty/fmt/doc/bootstrap/tables.less b/3rdparty/fmt/doc/bootstrap/tables.less
new file mode 100644
index 00000000..2242c036
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/tables.less
@@ -0,0 +1,234 @@
+//
+// Tables
+// --------------------------------------------------
+
+
+table {
+  background-color: @table-bg;
+}
+caption {
+  padding-top: @table-cell-padding;
+  padding-bottom: @table-cell-padding;
+  color: @text-muted;
+  text-align: left;
+}
+th {
+  text-align: left;
+}
+
+
+// Baseline styles
+
+.table {
+  width: 100%;
+  max-width: 100%;
+  margin-bottom: @line-height-computed;
+  // Cells
+  > thead,
+  > tbody,
+  > tfoot {
+    > tr {
+      > th,
+      > td {
+        padding: @table-cell-padding;
+        line-height: @line-height-base;
+        vertical-align: top;
+        border-top: 1px solid @table-border-color;
+      }
+    }
+  }
+  // Bottom align for column headings
+  > thead > tr > th {
+    vertical-align: bottom;
+    border-bottom: 2px solid @table-border-color;
+  }
+  // Remove top border from thead by default
+  > caption + thead,
+  > colgroup + thead,
+  > thead:first-child {
+    > tr:first-child {
+      > th,
+      > td {
+        border-top: 0;
+      }
+    }
+  }
+  // Account for multiple tbody instances
+  > tbody + tbody {
+    border-top: 2px solid @table-border-color;
+  }
+
+  // Nesting
+  .table {
+    background-color: @body-bg;
+  }
+}
+
+
+// Condensed table w/ half padding
+
+.table-condensed {
+  > thead,
+  > tbody,
+  > tfoot {
+    > tr {
+      > th,
+      > td {
+        padding: @table-condensed-cell-padding;
+      }
+    }
+  }
+}
+
+
+// Bordered version
+//
+// Add borders all around the table and between all the columns.
+
+.table-bordered {
+  border: 1px solid @table-border-color;
+  > thead,
+  > tbody,
+  > tfoot {
+    > tr {
+      > th,
+      > td {
+        border: 1px solid @table-border-color;
+      }
+    }
+  }
+  > thead > tr {
+    > th,
+    > td {
+      border-bottom-width: 2px;
+    }
+  }
+}
+
+
+// Zebra-striping
+//
+// Default zebra-stripe styles (alternating gray and transparent backgrounds)
+
+.table-striped {
+  > tbody > tr:nth-of-type(odd) {
+    background-color: @table-bg-accent;
+  }
+}
+
+
+// Hover effect
+//
+// Placed here since it has to come after the potential zebra striping
+
+.table-hover {
+  > tbody > tr:hover {
+    background-color: @table-bg-hover;
+  }
+}
+
+
+// Table cell sizing
+//
+// Reset default table behavior
+
+table col[class*="col-"] {
+  position: static; // Prevent border hiding in Firefox and IE9-11 (see https://github.com/twbs/bootstrap/issues/11623)
+  float: none;
+  display: table-column;
+}
+table {
+  td,
+  th {
+    &[class*="col-"] {
+      position: static; // Prevent border hiding in Firefox and IE9-11 (see https://github.com/twbs/bootstrap/issues/11623)
+      float: none;
+      display: table-cell;
+    }
+  }
+}
+
+
+// Table backgrounds
+//
+// Exact selectors below required to override `.table-striped` and prevent
+// inheritance to nested tables.
+
+// Generate the contextual variants
+.table-row-variant(active; @table-bg-active);
+.table-row-variant(success; @state-success-bg);
+.table-row-variant(info; @state-info-bg);
+.table-row-variant(warning; @state-warning-bg);
+.table-row-variant(danger; @state-danger-bg);
+
+
+// Responsive tables
+//
+// Wrap your tables in `.table-responsive` and we'll make them mobile friendly
+// by enabling horizontal scrolling. Only applies <768px. Everything above that
+// will display normally.
+
+.table-responsive {
+  overflow-x: auto;
+  min-height: 0.01%; // Workaround for IE9 bug (see https://github.com/twbs/bootstrap/issues/14837)
+
+  @media screen and (max-width: @screen-xs-max) {
+    width: 100%;
+    margin-bottom: (@line-height-computed * 0.75);
+    overflow-y: hidden;
+    -ms-overflow-style: -ms-autohiding-scrollbar;
+    border: 1px solid @table-border-color;
+
+    // Tighten up spacing
+    > .table {
+      margin-bottom: 0;
+
+      // Ensure the content doesn't wrap
+      > thead,
+      > tbody,
+      > tfoot {
+        > tr {
+          > th,
+          > td {
+            white-space: nowrap;
+          }
+        }
+      }
+    }
+
+    // Special overrides for the bordered tables
+    > .table-bordered {
+      border: 0;
+
+      // Nuke the appropriate borders so that the parent can handle them
+      > thead,
+      > tbody,
+      > tfoot {
+        > tr {
+          > th:first-child,
+          > td:first-child {
+            border-left: 0;
+          }
+          > th:last-child,
+          > td:last-child {
+            border-right: 0;
+          }
+        }
+      }
+
+      // Only nuke the last row's bottom-border in `tbody` and `tfoot` since
+      // chances are there will be only one `tr` in a `thead` and that would
+      // remove the border altogether.
+      > tbody,
+      > tfoot {
+        > tr:last-child {
+          > th,
+          > td {
+            border-bottom: 0;
+          }
+        }
+      }
+
+    }
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/theme.less b/3rdparty/fmt/doc/bootstrap/theme.less
new file mode 100644
index 00000000..6f2eb621
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/theme.less
@@ -0,0 +1,273 @@
+
+//
+// Load core variables and mixins
+// --------------------------------------------------
+
+@import "variables.less";
+@import "mixins.less";
+
+
+//
+// Buttons
+// --------------------------------------------------
+
+// Common styles
+.btn-default,
+.btn-primary,
+.btn-success,
+.btn-info,
+.btn-warning,
+.btn-danger {
+  text-shadow: 0 -1px 0 rgba(0,0,0,.2);
+  @shadow: inset 0 1px 0 rgba(255,255,255,.15), 0 1px 1px rgba(0,0,0,.075);
+  .box-shadow(@shadow);
+
+  // Reset the shadow
+  &:active,
+  &.active {
+    .box-shadow(inset 0 3px 5px rgba(0,0,0,.125));
+  }
+
+  .badge {
+    text-shadow: none;
+  }
+}
+
+// Mixin for generating new styles
+.btn-styles(@btn-color: #555) {
+  #gradient > .vertical(@start-color: @btn-color; @end-color: darken(@btn-color, 12%));
+  .reset-filter(); // Disable gradients for IE9 because filter bleeds through rounded corners; see https://github.com/twbs/bootstrap/issues/10620
+  background-repeat: repeat-x;
+  border-color: darken(@btn-color, 14%);
+
+  &:hover,
+  &:focus  {
+    background-color: darken(@btn-color, 12%);
+    background-position: 0 -15px;
+  }
+
+  &:active,
+  &.active {
+    background-color: darken(@btn-color, 12%);
+    border-color: darken(@btn-color, 14%);
+  }
+
+  &.disabled,
+  &:disabled,
+  &[disabled] {
+    background-color: darken(@btn-color, 12%);
+    background-image: none;
+  }
+}
+
+// Common styles
+.btn {
+  // Remove the gradient for the pressed/active state
+  &:active,
+  &.active {
+    background-image: none;
+  }
+}
+
+// Apply the mixin to the buttons
+.btn-default { .btn-styles(@btn-default-bg); text-shadow: 0 1px 0 #fff; border-color: #ccc; }
+.btn-primary { .btn-styles(@btn-primary-bg); }
+.btn-success { .btn-styles(@btn-success-bg); }
+.btn-info    { .btn-styles(@btn-info-bg); }
+.btn-warning { .btn-styles(@btn-warning-bg); }
+.btn-danger  { .btn-styles(@btn-danger-bg); }
+
+
+//
+// Images
+// --------------------------------------------------
+
+.thumbnail,
+.img-thumbnail {
+  .box-shadow(0 1px 2px rgba(0,0,0,.075));
+}
+
+
+//
+// Dropdowns
+// --------------------------------------------------
+
+.dropdown-menu > li > a:hover,
+.dropdown-menu > li > a:focus {
+  #gradient > .vertical(@start-color: @dropdown-link-hover-bg; @end-color: darken(@dropdown-link-hover-bg, 5%));
+  background-color: darken(@dropdown-link-hover-bg, 5%);
+}
+.dropdown-menu > .active > a,
+.dropdown-menu > .active > a:hover,
+.dropdown-menu > .active > a:focus {
+  #gradient > .vertical(@start-color: @dropdown-link-active-bg; @end-color: darken(@dropdown-link-active-bg, 5%));
+  background-color: darken(@dropdown-link-active-bg, 5%);
+}
+
+
+//
+// Navbar
+// --------------------------------------------------
+
+// Default navbar
+.navbar-default {
+  #gradient > .vertical(@start-color: lighten(@navbar-default-bg, 10%); @end-color: @navbar-default-bg);
+  .reset-filter(); // Remove gradient in IE<10 to fix bug where dropdowns don't get triggered
+  border-radius: @navbar-border-radius;
+  @shadow: inset 0 1px 0 rgba(255,255,255,.15), 0 1px 5px rgba(0,0,0,.075);
+  .box-shadow(@shadow);
+
+  .navbar-nav > .open > a,
+  .navbar-nav > .active > a {
+    #gradient > .vertical(@start-color: darken(@navbar-default-link-active-bg, 5%); @end-color: darken(@navbar-default-link-active-bg, 2%));
+    .box-shadow(inset 0 3px 9px rgba(0,0,0,.075));
+  }
+}
+.navbar-brand,
+.navbar-nav > li > a {
+  text-shadow: 0 1px 0 rgba(255,255,255,.25);
+}
+
+// Inverted navbar
+.navbar-inverse {
+  #gradient > .vertical(@start-color: lighten(@navbar-inverse-bg, 10%); @end-color: @navbar-inverse-bg);
+  .reset-filter(); // Remove gradient in IE<10 to fix bug where dropdowns don't get triggered; see https://github.com/twbs/bootstrap/issues/10257
+
+  .navbar-nav > .open > a,
+  .navbar-nav > .active > a {
+    #gradient > .vertical(@start-color: @navbar-inverse-link-active-bg; @end-color: lighten(@navbar-inverse-link-active-bg, 2.5%));
+    .box-shadow(inset 0 3px 9px rgba(0,0,0,.25));
+  }
+
+  .navbar-brand,
+  .navbar-nav > li > a {
+    text-shadow: 0 -1px 0 rgba(0,0,0,.25);
+  }
+}
+
+// Undo rounded corners in static and fixed navbars
+.navbar-static-top,
+.navbar-fixed-top,
+.navbar-fixed-bottom {
+  border-radius: 0;
+}
+
+// Fix active state of dropdown items in collapsed mode
+@media (max-width: @grid-float-breakpoint-max) {
+  .navbar .navbar-nav .open .dropdown-menu > .active > a {
+    &,
+    &:hover,
+    &:focus {
+      color: #fff;
+      #gradient > .vertical(@start-color: @dropdown-link-active-bg; @end-color: darken(@dropdown-link-active-bg, 5%));
+    }
+  }
+}
+
+
+//
+// Alerts
+// --------------------------------------------------
+
+// Common styles
+.alert {
+  text-shadow: 0 1px 0 rgba(255,255,255,.2);
+  @shadow: inset 0 1px 0 rgba(255,255,255,.25), 0 1px 2px rgba(0,0,0,.05);
+  .box-shadow(@shadow);
+}
+
+// Mixin for generating new styles
+.alert-styles(@color) {
+  #gradient > .vertical(@start-color: @color; @end-color: darken(@color, 7.5%));
+  border-color: darken(@color, 15%);
+}
+
+// Apply the mixin to the alerts
+.alert-success    { .alert-styles(@alert-success-bg); }
+.alert-info       { .alert-styles(@alert-info-bg); }
+.alert-warning    { .alert-styles(@alert-warning-bg); }
+.alert-danger     { .alert-styles(@alert-danger-bg); }
+
+
+//
+// Progress bars
+// --------------------------------------------------
+
+// Give the progress background some depth
+.progress {
+  #gradient > .vertical(@start-color: darken(@progress-bg, 4%); @end-color: @progress-bg)
+}
+
+// Mixin for generating new styles
+.progress-bar-styles(@color) {
+  #gradient > .vertical(@start-color: @color; @end-color: darken(@color, 10%));
+}
+
+// Apply the mixin to the progress bars
+.progress-bar            { .progress-bar-styles(@progress-bar-bg); }
+.progress-bar-success    { .progress-bar-styles(@progress-bar-success-bg); }
+.progress-bar-info       { .progress-bar-styles(@progress-bar-info-bg); }
+.progress-bar-warning    { .progress-bar-styles(@progress-bar-warning-bg); }
+.progress-bar-danger     { .progress-bar-styles(@progress-bar-danger-bg); }
+
+// Reset the striped class because our mixins don't do multiple gradients and
+// the above custom styles override the new `.progress-bar-striped` in v3.2.0.
+.progress-bar-striped {
+  #gradient > .striped();
+}
+
+
+//
+// List groups
+// --------------------------------------------------
+
+.list-group {
+  border-radius: @border-radius-base;
+  .box-shadow(0 1px 2px rgba(0,0,0,.075));
+}
+.list-group-item.active,
+.list-group-item.active:hover,
+.list-group-item.active:focus {
+  text-shadow: 0 -1px 0 darken(@list-group-active-bg, 10%);
+  #gradient > .vertical(@start-color: @list-group-active-bg; @end-color: darken(@list-group-active-bg, 7.5%));
+  border-color: darken(@list-group-active-border, 7.5%);
+
+  .badge {
+    text-shadow: none;
+  }
+}
+
+
+//
+// Panels
+// --------------------------------------------------
+
+// Common styles
+.panel {
+  .box-shadow(0 1px 2px rgba(0,0,0,.05));
+}
+
+// Mixin for generating new styles
+.panel-heading-styles(@color) {
+  #gradient > .vertical(@start-color: @color; @end-color: darken(@color, 5%));
+}
+
+// Apply the mixin to the panel headings only
+.panel-default > .panel-heading   { .panel-heading-styles(@panel-default-heading-bg); }
+.panel-primary > .panel-heading   { .panel-heading-styles(@panel-primary-heading-bg); }
+.panel-success > .panel-heading   { .panel-heading-styles(@panel-success-heading-bg); }
+.panel-info > .panel-heading      { .panel-heading-styles(@panel-info-heading-bg); }
+.panel-warning > .panel-heading   { .panel-heading-styles(@panel-warning-heading-bg); }
+.panel-danger > .panel-heading    { .panel-heading-styles(@panel-danger-heading-bg); }
+
+
+//
+// Wells
+// --------------------------------------------------
+
+.well {
+  #gradient > .vertical(@start-color: darken(@well-bg, 5%); @end-color: @well-bg);
+  border-color: darken(@well-bg, 10%);
+  @shadow: inset 0 1px 3px rgba(0,0,0,.05), 0 1px 0 rgba(255,255,255,.1);
+  .box-shadow(@shadow);
+}
diff --git a/3rdparty/fmt/doc/bootstrap/thumbnails.less b/3rdparty/fmt/doc/bootstrap/thumbnails.less
new file mode 100644
index 00000000..0713e67d
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/thumbnails.less
@@ -0,0 +1,36 @@
+//
+// Thumbnails
+// --------------------------------------------------
+
+
+// Mixin and adjust the regular image class
+.thumbnail {
+  display: block;
+  padding: @thumbnail-padding;
+  margin-bottom: @line-height-computed;
+  line-height: @line-height-base;
+  background-color: @thumbnail-bg;
+  border: 1px solid @thumbnail-border;
+  border-radius: @thumbnail-border-radius;
+  .transition(border .2s ease-in-out);
+
+  > img,
+  a > img {
+    &:extend(.img-responsive);
+    margin-left: auto;
+    margin-right: auto;
+  }
+
+  // Add a hover state for linked versions only
+  a&:hover,
+  a&:focus,
+  a&.active {
+    border-color: @link-color;
+  }
+
+  // Image captions
+  .caption {
+    padding: @thumbnail-caption-padding;
+    color: @thumbnail-caption-color;
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/tooltip.less b/3rdparty/fmt/doc/bootstrap/tooltip.less
new file mode 100644
index 00000000..9d568474
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/tooltip.less
@@ -0,0 +1,102 @@
+//
+// Tooltips
+// --------------------------------------------------
+
+
+// Base class
+.tooltip {
+  position: absolute;
+  z-index: @zindex-tooltip;
+  display: block;
+  // Reset font and text properties given new insertion method
+  font-family: @font-family-base;
+  font-size: @font-size-small;
+  font-weight: normal;
+  line-height: 1.4;
+  .opacity(0);
+
+  &.in     { .opacity(@tooltip-opacity); }
+  &.top    { margin-top:  -3px; padding: @tooltip-arrow-width 0; }
+  &.right  { margin-left:  3px; padding: 0 @tooltip-arrow-width; }
+  &.bottom { margin-top:   3px; padding: @tooltip-arrow-width 0; }
+  &.left   { margin-left: -3px; padding: 0 @tooltip-arrow-width; }
+}
+
+// Wrapper for the tooltip content
+.tooltip-inner {
+  max-width: @tooltip-max-width;
+  padding: 3px 8px;
+  color: @tooltip-color;
+  text-align: center;
+  text-decoration: none;
+  background-color: @tooltip-bg;
+  border-radius: @border-radius-base;
+}
+
+// Arrows
+.tooltip-arrow {
+  position: absolute;
+  width: 0;
+  height: 0;
+  border-color: transparent;
+  border-style: solid;
+}
+// Note: Deprecated .top-left, .top-right, .bottom-left, and .bottom-right as of v3.3.1
+.tooltip {
+  &.top .tooltip-arrow {
+    bottom: 0;
+    left: 50%;
+    margin-left: -@tooltip-arrow-width;
+    border-width: @tooltip-arrow-width @tooltip-arrow-width 0;
+    border-top-color: @tooltip-arrow-color;
+  }
+  &.top-left .tooltip-arrow {
+    bottom: 0;
+    right: @tooltip-arrow-width;
+    margin-bottom: -@tooltip-arrow-width;
+    border-width: @tooltip-arrow-width @tooltip-arrow-width 0;
+    border-top-color: @tooltip-arrow-color;
+  }
+  &.top-right .tooltip-arrow {
+    bottom: 0;
+    left: @tooltip-arrow-width;
+    margin-bottom: -@tooltip-arrow-width;
+    border-width: @tooltip-arrow-width @tooltip-arrow-width 0;
+    border-top-color: @tooltip-arrow-color;
+  }
+  &.right .tooltip-arrow {
+    top: 50%;
+    left: 0;
+    margin-top: -@tooltip-arrow-width;
+    border-width: @tooltip-arrow-width @tooltip-arrow-width @tooltip-arrow-width 0;
+    border-right-color: @tooltip-arrow-color;
+  }
+  &.left .tooltip-arrow {
+    top: 50%;
+    right: 0;
+    margin-top: -@tooltip-arrow-width;
+    border-width: @tooltip-arrow-width 0 @tooltip-arrow-width @tooltip-arrow-width;
+    border-left-color: @tooltip-arrow-color;
+  }
+  &.bottom .tooltip-arrow {
+    top: 0;
+    left: 50%;
+    margin-left: -@tooltip-arrow-width;
+    border-width: 0 @tooltip-arrow-width @tooltip-arrow-width;
+    border-bottom-color: @tooltip-arrow-color;
+  }
+  &.bottom-left .tooltip-arrow {
+    top: 0;
+    right: @tooltip-arrow-width;
+    margin-top: -@tooltip-arrow-width;
+    border-width: 0 @tooltip-arrow-width @tooltip-arrow-width;
+    border-bottom-color: @tooltip-arrow-color;
+  }
+  &.bottom-right .tooltip-arrow {
+    top: 0;
+    left: @tooltip-arrow-width;
+    margin-top: -@tooltip-arrow-width;
+    border-width: 0 @tooltip-arrow-width @tooltip-arrow-width;
+    border-bottom-color: @tooltip-arrow-color;
+  }
+}
diff --git a/3rdparty/fmt/doc/bootstrap/type.less b/3rdparty/fmt/doc/bootstrap/type.less
new file mode 100644
index 00000000..68ba6017
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/type.less
@@ -0,0 +1,302 @@
+//
+// Typography
+// --------------------------------------------------
+
+
+// Headings
+// -------------------------
+
+h1, h2, h3, h4, h5, h6,
+.h1, .h2, .h3, .h4, .h5, .h6 {
+  font-family: @headings-font-family;
+  font-weight: @headings-font-weight;
+  line-height: @headings-line-height;
+  color: @headings-color;
+
+  small,
+  .small {
+    font-weight: normal;
+    line-height: 1;
+    color: @headings-small-color;
+  }
+}
+
+h1, .h1,
+h2, .h2,
+h3, .h3 {
+  margin-top: @line-height-computed;
+  margin-bottom: (@line-height-computed / 2);
+
+  small,
+  .small {
+    font-size: 65%;
+  }
+}
+h4, .h4,
+h5, .h5,
+h6, .h6 {
+  margin-top: (@line-height-computed / 2);
+  margin-bottom: (@line-height-computed / 2);
+
+  small,
+  .small {
+    font-size: 75%;
+  }
+}
+
+h1, .h1 { font-size: @font-size-h1; }
+h2, .h2 { font-size: @font-size-h2; }
+h3, .h3 { font-size: @font-size-h3; }
+h4, .h4 { font-size: @font-size-h4; }
+h5, .h5 { font-size: @font-size-h5; }
+h6, .h6 { font-size: @font-size-h6; }
+
+
+// Body text
+// -------------------------
+
+p {
+  margin: 0 0 (@line-height-computed / 2);
+}
+
+.lead {
+  margin-bottom: @line-height-computed;
+  font-size: floor((@font-size-base * 1.15));
+  font-weight: 300;
+  line-height: 1.4;
+
+  @media (min-width: @screen-sm-min) {
+    font-size: (@font-size-base * 1.5);
+  }
+}
+
+
+// Emphasis & misc
+// -------------------------
+
+// Ex: (12px small font / 14px base font) * 100% = about 85%
+small,
+.small {
+  font-size: floor((100% * @font-size-small / @font-size-base));
+}
+
+mark,
+.mark {
+  background-color: @state-warning-bg;
+  padding: .2em;
+}
+
+// Alignment
+.text-left           { text-align: left; }
+.text-right          { text-align: right; }
+.text-center         { text-align: center; }
+.text-justify        { text-align: justify; }
+.text-nowrap         { white-space: nowrap; }
+
+// Transformation
+.text-lowercase      { text-transform: lowercase; }
+.text-uppercase      { text-transform: uppercase; }
+.text-capitalize     { text-transform: capitalize; }
+
+// Contextual colors
+.text-muted {
+  color: @text-muted;
+}
+.text-primary {
+  .text-emphasis-variant(@brand-primary);
+}
+.text-success {
+  .text-emphasis-variant(@state-success-text);
+}
+.text-info {
+  .text-emphasis-variant(@state-info-text);
+}
+.text-warning {
+  .text-emphasis-variant(@state-warning-text);
+}
+.text-danger {
+  .text-emphasis-variant(@state-danger-text);
+}
+
+// Contextual backgrounds
+// For now we'll leave these alongside the text classes until v4 when we can
+// safely shift things around (per SemVer rules).
+.bg-primary {
+  // Given the contrast here, this is the only class to have its color inverted
+  // automatically.
+  color: #fff;
+  .bg-variant(@brand-primary);
+}
+.bg-success {
+  .bg-variant(@state-success-bg);
+}
+.bg-info {
+  .bg-variant(@state-info-bg);
+}
+.bg-warning {
+  .bg-variant(@state-warning-bg);
+}
+.bg-danger {
+  .bg-variant(@state-danger-bg);
+}
+
+
+// Page header
+// -------------------------
+
+.page-header {
+  padding-bottom: ((@line-height-computed / 2) - 1);
+  margin: (@line-height-computed * 2) 0 @line-height-computed;
+  border-bottom: 1px solid @page-header-border-color;
+}
+
+
+// Lists
+// -------------------------
+
+// Unordered and Ordered lists
+ul,
+ol {
+  margin-top: 0;
+  margin-bottom: (@line-height-computed / 2);
+  ul,
+  ol {
+    margin-bottom: 0;
+  }
+}
+
+// List options
+
+// Unstyled keeps list items block level, just removes default browser padding and list-style
+.list-unstyled {
+  padding-left: 0;
+  list-style: none;
+}
+
+// Inline turns list items into inline-block
+.list-inline {
+  .list-unstyled();
+  margin-left: -5px;
+
+  > li {
+    display: inline-block;
+    padding-left: 5px;
+    padding-right: 5px;
+  }
+}
+
+// Description Lists
+dl {
+  margin-top: 0; // Remove browser default
+  margin-bottom: @line-height-computed;
+}
+dt,
+dd {
+  line-height: @line-height-base;
+}
+dt {
+  font-weight: bold;
+}
+dd {
+  margin-left: 0; // Undo browser default
+}
+
+// Horizontal description lists
+//
+// Defaults to being stacked without any of the below styles applied, until the
+// grid breakpoint is reached (default of ~768px).
+
+.dl-horizontal {
+  dd {
+    &:extend(.clearfix all); // Clear the floated `dt` if an empty `dd` is present
+  }
+
+  @media (min-width: @grid-float-breakpoint) {
+    dt {
+      float: left;
+      width: (@dl-horizontal-offset - 20);
+      clear: left;
+      text-align: right;
+      .text-overflow();
+    }
+    dd {
+      margin-left: @dl-horizontal-offset;
+    }
+  }
+}
+
+
+// Misc
+// -------------------------
+
+// Abbreviations and acronyms
+abbr[title],
+// Add data-* attribute to help out our tooltip plugin, per https://github.com/twbs/bootstrap/issues/5257
+abbr[data-original-title] {
+  cursor: help;
+  border-bottom: 1px dotted @abbr-border-color;
+}
+.initialism {
+  font-size: 90%;
+  .text-uppercase();
+}
+
+// Blockquotes
+blockquote {
+  padding: (@line-height-computed / 2) @line-height-computed;
+  margin: 0 0 @line-height-computed;
+  font-size: @blockquote-font-size;
+  border-left: 5px solid @blockquote-border-color;
+
+  p,
+  ul,
+  ol {
+    &:last-child {
+      margin-bottom: 0;
+    }
+  }
+
+  // Note: Deprecated small and .small as of v3.1.0
+  // Context: https://github.com/twbs/bootstrap/issues/11660
+  footer,
+  small,
+  .small {
+    display: block;
+    font-size: 80%; // back to default font-size
+    line-height: @line-height-base;
+    color: @blockquote-small-color;
+
+    &:before {
+      content: '\2014 \00A0'; // em dash, nbsp
+    }
+  }
+}
+
+// Opposite alignment of blockquote
+//
+// Heads up: `blockquote.pull-right` has been deprecated as of v3.1.0.
+.blockquote-reverse,
+blockquote.pull-right {
+  padding-right: 15px;
+  padding-left: 0;
+  border-right: 5px solid @blockquote-border-color;
+  border-left: 0;
+  text-align: right;
+
+  // Account for citation
+  footer,
+  small,
+  .small {
+    &:before { content: ''; }
+    &:after {
+      content: '\00A0 \2014'; // nbsp, em dash
+    }
+  }
+}
+
+// Addresses
+address {
+  margin-bottom: @line-height-computed;
+  font-style: normal;
+  line-height: @line-height-base;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/utilities.less b/3rdparty/fmt/doc/bootstrap/utilities.less
new file mode 100644
index 00000000..7a8ca27a
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/utilities.less
@@ -0,0 +1,55 @@
+//
+// Utility classes
+// --------------------------------------------------
+
+
+// Floats
+// -------------------------
+
+.clearfix {
+  .clearfix();
+}
+.center-block {
+  .center-block();
+}
+.pull-right {
+  float: right !important;
+}
+.pull-left {
+  float: left !important;
+}
+
+
+// Toggling content
+// -------------------------
+
+// Note: Deprecated .hide in favor of .hidden or .sr-only (as appropriate) in v3.0.1
+.hide {
+  display: none !important;
+}
+.show {
+  display: block !important;
+}
+.invisible {
+  visibility: hidden;
+}
+.text-hide {
+  .text-hide();
+}
+
+
+// Hide from screenreaders and browsers
+//
+// Credit: HTML5 Boilerplate
+
+.hidden {
+  display: none !important;
+}
+
+
+// For Affix plugin
+// -------------------------
+
+.affix {
+  position: fixed;
+}
diff --git a/3rdparty/fmt/doc/bootstrap/variables.less b/3rdparty/fmt/doc/bootstrap/variables.less
new file mode 100644
index 00000000..b5fb9d02
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/variables.less
@@ -0,0 +1,861 @@
+//
+// Variables
+// --------------------------------------------------
+
+
+//== Colors
+//
+//## Gray and brand colors for use across Bootstrap.
+
+@gray-base:              #000;
+@gray-darker:            lighten(@gray-base, 13.5%); // #222
+@gray-dark:              lighten(@gray-base, 20%);   // #333
+@gray:                   lighten(@gray-base, 33.5%); // #555
+@gray-light:             lighten(@gray-base, 46.7%); // #777
+@gray-lighter:           lighten(@gray-base, 93.5%); // #eee
+
+@brand-primary:         darken(#428bca, 6.5%); // #337ab7
+@brand-success:         #5cb85c;
+@brand-info:            #5bc0de;
+@brand-warning:         #f0ad4e;
+@brand-danger:          #d9534f;
+
+
+//== Scaffolding
+//
+//## Settings for some of the most global styles.
+
+//** Background color for `<body>`.
+@body-bg:               #fff;
+//** Global text color on `<body>`.
+@text-color:            @gray-dark;
+
+//** Global textual link color.
+@link-color:            @brand-primary;
+//** Link hover color set via `darken()` function.
+@link-hover-color:      darken(@link-color, 15%);
+//** Link hover decoration.
+@link-hover-decoration: underline;
+
+
+//== Typography
+//
+//## Font, line-height, and color for body text, headings, and more.
+
+@font-family-sans-serif:  "Helvetica Neue", Helvetica, Arial, sans-serif;
+@font-family-serif:       Georgia, "Times New Roman", Times, serif;
+//** Default monospace fonts for `<code>`, `<kbd>`, and `<pre>`.
+@font-family-monospace:   Menlo, Monaco, Consolas, "Courier New", monospace;
+@font-family-base:        @font-family-sans-serif;
+
+@font-size-base:          14px;
+@font-size-large:         ceil((@font-size-base * 1.25)); // ~18px
+@font-size-small:         ceil((@font-size-base * 0.85)); // ~12px
+
+@font-size-h1:            floor((@font-size-base * 2.6)); // ~36px
+@font-size-h2:            floor((@font-size-base * 2.15)); // ~30px
+@font-size-h3:            ceil((@font-size-base * 1.7)); // ~24px
+@font-size-h4:            ceil((@font-size-base * 1.25)); // ~18px
+@font-size-h5:            @font-size-base;
+@font-size-h6:            ceil((@font-size-base * 0.85)); // ~12px
+
+//** Unit-less `line-height` for use in components like buttons.
+@line-height-base:        1.428571429; // 20/14
+//** Computed "line-height" (`font-size` * `line-height`) for use with `margin`, `padding`, etc.
+@line-height-computed:    floor((@font-size-base * @line-height-base)); // ~20px
+
+//** By default, this inherits from the `<body>`.
+@headings-font-family:    inherit;
+@headings-font-weight:    500;
+@headings-line-height:    1.1;
+@headings-color:          inherit;
+
+
+//== Iconography
+//
+//## Specify custom location and filename of the included Glyphicons icon font. Useful for those including Bootstrap via Bower.
+
+//** Load fonts from this directory.
+@icon-font-path:          "../fonts/";
+//** File name for all font files.
+@icon-font-name:          "glyphicons-halflings-regular";
+//** Element ID within SVG icon file.
+@icon-font-svg-id:        "glyphicons_halflingsregular";
+
+
+//== Components
+//
+//## Define common padding and border radius sizes and more. Values based on 14px text and 1.428 line-height (~20px to start).
+
+@padding-base-vertical:     6px;
+@padding-base-horizontal:   12px;
+
+@padding-large-vertical:    10px;
+@padding-large-horizontal:  16px;
+
+@padding-small-vertical:    5px;
+@padding-small-horizontal:  10px;
+
+@padding-xs-vertical:       1px;
+@padding-xs-horizontal:     5px;
+
+@line-height-large:         1.3333333; // extra decimals for Win 8.1 Chrome
+@line-height-small:         1.5;
+
+@border-radius-base:        4px;
+@border-radius-large:       6px;
+@border-radius-small:       3px;
+
+//** Global color for active items (e.g., navs or dropdowns).
+@component-active-color:    #fff;
+//** Global background color for active items (e.g., navs or dropdowns).
+@component-active-bg:       @brand-primary;
+
+//** Width of the `border` for generating carets that indicator dropdowns.
+@caret-width-base:          4px;
+//** Carets increase slightly in size for larger components.
+@caret-width-large:         5px;
+
+
+//== Tables
+//
+//## Customizes the `.table` component with basic values, each used across all table variations.
+
+//** Padding for `<th>`s and `<td>`s.
+@table-cell-padding:            8px;
+//** Padding for cells in `.table-condensed`.
+@table-condensed-cell-padding:  5px;
+
+//** Default background color used for all tables.
+@table-bg:                      transparent;
+//** Background color used for `.table-striped`.
+@table-bg-accent:               #f9f9f9;
+//** Background color used for `.table-hover`.
+@table-bg-hover:                #f5f5f5;
+@table-bg-active:               @table-bg-hover;
+
+//** Border color for table and cell borders.
+@table-border-color:            #ddd;
+
+
+//== Buttons
+//
+//## For each of Bootstrap's buttons, define text, background and border color.
+
+@btn-font-weight:                normal;
+
+@btn-default-color:              #333;
+@btn-default-bg:                 #fff;
+@btn-default-border:             #ccc;
+
+@btn-primary-color:              #fff;
+@btn-primary-bg:                 @brand-primary;
+@btn-primary-border:             darken(@btn-primary-bg, 5%);
+
+@btn-success-color:              #fff;
+@btn-success-bg:                 @brand-success;
+@btn-success-border:             darken(@btn-success-bg, 5%);
+
+@btn-info-color:                 #fff;
+@btn-info-bg:                    @brand-info;
+@btn-info-border:                darken(@btn-info-bg, 5%);
+
+@btn-warning-color:              #fff;
+@btn-warning-bg:                 @brand-warning;
+@btn-warning-border:             darken(@btn-warning-bg, 5%);
+
+@btn-danger-color:               #fff;
+@btn-danger-bg:                  @brand-danger;
+@btn-danger-border:              darken(@btn-danger-bg, 5%);
+
+@btn-link-disabled-color:        @gray-light;
+
+
+//== Forms
+//
+//##
+
+//** `<input>` background color
+@input-bg:                       #fff;
+//** `<input disabled>` background color
+@input-bg-disabled:              @gray-lighter;
+
+//** Text color for `<input>`s
+@input-color:                    @gray;
+//** `<input>` border color
+@input-border:                   #ccc;
+
+// TODO: Rename `@input-border-radius` to `@input-border-radius-base` in v4
+//** Default `.form-control` border radius
+// This has no effect on `<select>`s in some browsers, due to the limited stylability of `<select>`s in CSS.
+@input-border-radius:            @border-radius-base;
+//** Large `.form-control` border radius
+@input-border-radius-large:      @border-radius-large;
+//** Small `.form-control` border radius
+@input-border-radius-small:      @border-radius-small;
+
+//** Border color for inputs on focus
+@input-border-focus:             #66afe9;
+
+//** Placeholder text color
+@input-color-placeholder:        #999;
+
+//** Default `.form-control` height
+@input-height-base:              (@line-height-computed + (@padding-base-vertical * 2) + 2);
+//** Large `.form-control` height
+@input-height-large:             (ceil(@font-size-large * @line-height-large) + (@padding-large-vertical * 2) + 2);
+//** Small `.form-control` height
+@input-height-small:             (floor(@font-size-small * @line-height-small) + (@padding-small-vertical * 2) + 2);
+
+//** `.form-group` margin
+@form-group-margin-bottom:       15px;
+
+@legend-color:                   @gray-dark;
+@legend-border-color:            #e5e5e5;
+
+//** Background color for textual input addons
+@input-group-addon-bg:           @gray-lighter;
+//** Border color for textual input addons
+@input-group-addon-border-color: @input-border;
+
+//** Disabled cursor for form controls and buttons.
+@cursor-disabled:                not-allowed;
+
+
+//== Dropdowns
+//
+//## Dropdown menu container and contents.
+
+//** Background for the dropdown menu.
+@dropdown-bg:                    #fff;
+//** Dropdown menu `border-color`.
+@dropdown-border:                rgba(0,0,0,.15);
+//** Dropdown menu `border-color` **for IE8**.
+@dropdown-fallback-border:       #ccc;
+//** Divider color for between dropdown items.
+@dropdown-divider-bg:            #e5e5e5;
+
+//** Dropdown link text color.
+@dropdown-link-color:            @gray-dark;
+//** Hover color for dropdown links.
+@dropdown-link-hover-color:      darken(@gray-dark, 5%);
+//** Hover background for dropdown links.
+@dropdown-link-hover-bg:         #f5f5f5;
+
+//** Active dropdown menu item text color.
+@dropdown-link-active-color:     @component-active-color;
+//** Active dropdown menu item background color.
+@dropdown-link-active-bg:        @component-active-bg;
+
+//** Disabled dropdown menu item background color.
+@dropdown-link-disabled-color:   @gray-light;
+
+//** Text color for headers within dropdown menus.
+@dropdown-header-color:          @gray-light;
+
+//** Deprecated `@dropdown-caret-color` as of v3.1.0
+@dropdown-caret-color:           #000;
+
+
+//-- Z-index master list
+//
+// Warning: Avoid customizing these values. They're used for a bird's eye view
+// of components dependent on the z-axis and are designed to all work together.
+//
+// Note: These variables are not generated into the Customizer.
+
+@zindex-navbar:            1000;
+@zindex-dropdown:          1000;
+@zindex-popover:           1060;
+@zindex-tooltip:           1070;
+@zindex-navbar-fixed:      1030;
+@zindex-modal-background:  1040;
+@zindex-modal:             1050;
+
+
+//== Media queries breakpoints
+//
+//## Define the breakpoints at which your layout will change, adapting to different screen sizes.
+
+// Extra small screen / phone
+//** Deprecated `@screen-xs` as of v3.0.1
+@screen-xs:                  480px;
+//** Deprecated `@screen-xs-min` as of v3.2.0
+@screen-xs-min:              @screen-xs;
+//** Deprecated `@screen-phone` as of v3.0.1
+@screen-phone:               @screen-xs-min;
+
+// Small screen / tablet
+//** Deprecated `@screen-sm` as of v3.0.1
+@screen-sm:                  768px;
+@screen-sm-min:              @screen-sm;
+//** Deprecated `@screen-tablet` as of v3.0.1
+@screen-tablet:              @screen-sm-min;
+
+// Medium screen / desktop
+//** Deprecated `@screen-md` as of v3.0.1
+@screen-md:                  992px;
+@screen-md-min:              @screen-md;
+//** Deprecated `@screen-desktop` as of v3.0.1
+@screen-desktop:             @screen-md-min;
+
+// Large screen / wide desktop
+//** Deprecated `@screen-lg` as of v3.0.1
+@screen-lg:                  1200px;
+@screen-lg-min:              @screen-lg;
+//** Deprecated `@screen-lg-desktop` as of v3.0.1
+@screen-lg-desktop:          @screen-lg-min;
+
+// So media queries don't overlap when required, provide a maximum
+@screen-xs-max:              (@screen-sm-min - 1);
+@screen-sm-max:              (@screen-md-min - 1);
+@screen-md-max:              (@screen-lg-min - 1);
+
+
+//== Grid system
+//
+//## Define your custom responsive grid.
+
+//** Number of columns in the grid.
+@grid-columns:              12;
+//** Padding between columns. Gets divided in half for the left and right.
+@grid-gutter-width:         30px;
+// Navbar collapse
+//** Point at which the navbar becomes uncollapsed.
+@grid-float-breakpoint:     @screen-sm-min;
+//** Point at which the navbar begins collapsing.
+@grid-float-breakpoint-max: (@grid-float-breakpoint - 1);
+
+
+//== Container sizes
+//
+//## Define the maximum width of `.container` for different screen sizes.
+
+// Small screen / tablet
+@container-tablet:             (720px + @grid-gutter-width);
+//** For `@screen-sm-min` and up.
+@container-sm:                 @container-tablet;
+
+// Medium screen / desktop
+@container-desktop:            (940px + @grid-gutter-width);
+//** For `@screen-md-min` and up.
+@container-md:                 @container-desktop;
+
+// Large screen / wide desktop
+@container-large-desktop:      (1140px + @grid-gutter-width);
+//** For `@screen-lg-min` and up.
+@container-lg:                 @container-large-desktop;
+
+
+//== Navbar
+//
+//##
+
+// Basics of a navbar
+@navbar-height:                    50px;
+@navbar-margin-bottom:             @line-height-computed;
+@navbar-border-radius:             @border-radius-base;
+@navbar-padding-horizontal:        floor((@grid-gutter-width / 2));
+@navbar-padding-vertical:          ((@navbar-height - @line-height-computed) / 2);
+@navbar-collapse-max-height:       340px;
+
+@navbar-default-color:             #777;
+@navbar-default-bg:                #f8f8f8;
+@navbar-default-border:            darken(@navbar-default-bg, 6.5%);
+
+// Navbar links
+@navbar-default-link-color:                #777;
+@navbar-default-link-hover-color:          #333;
+@navbar-default-link-hover-bg:             transparent;
+@navbar-default-link-active-color:         #555;
+@navbar-default-link-active-bg:            darken(@navbar-default-bg, 6.5%);
+@navbar-default-link-disabled-color:       #ccc;
+@navbar-default-link-disabled-bg:          transparent;
+
+// Navbar brand label
+@navbar-default-brand-color:               @navbar-default-link-color;
+@navbar-default-brand-hover-color:         darken(@navbar-default-brand-color, 10%);
+@navbar-default-brand-hover-bg:            transparent;
+
+// Navbar toggle
+@navbar-default-toggle-hover-bg:           #ddd;
+@navbar-default-toggle-icon-bar-bg:        #888;
+@navbar-default-toggle-border-color:       #ddd;
+
+
+// Inverted navbar
+// Reset inverted navbar basics
+@navbar-inverse-color:                      lighten(@gray-light, 15%);
+@navbar-inverse-bg:                         #222;
+@navbar-inverse-border:                     darken(@navbar-inverse-bg, 10%);
+
+// Inverted navbar links
+@navbar-inverse-link-color:                 lighten(@gray-light, 15%);
+@navbar-inverse-link-hover-color:           #fff;
+@navbar-inverse-link-hover-bg:              transparent;
+@navbar-inverse-link-active-color:          @navbar-inverse-link-hover-color;
+@navbar-inverse-link-active-bg:             darken(@navbar-inverse-bg, 10%);
+@navbar-inverse-link-disabled-color:        #444;
+@navbar-inverse-link-disabled-bg:           transparent;
+
+// Inverted navbar brand label
+@navbar-inverse-brand-color:                @navbar-inverse-link-color;
+@navbar-inverse-brand-hover-color:          #fff;
+@navbar-inverse-brand-hover-bg:             transparent;
+
+// Inverted navbar toggle
+@navbar-inverse-toggle-hover-bg:            #333;
+@navbar-inverse-toggle-icon-bar-bg:         #fff;
+@navbar-inverse-toggle-border-color:        #333;
+
+
+//== Navs
+//
+//##
+
+//=== Shared nav styles
+@nav-link-padding:                          10px 15px;
+@nav-link-hover-bg:                         @gray-lighter;
+
+@nav-disabled-link-color:                   @gray-light;
+@nav-disabled-link-hover-color:             @gray-light;
+
+//== Tabs
+@nav-tabs-border-color:                     #ddd;
+
+@nav-tabs-link-hover-border-color:          @gray-lighter;
+
+@nav-tabs-active-link-hover-bg:             @body-bg;
+@nav-tabs-active-link-hover-color:          @gray;
+@nav-tabs-active-link-hover-border-color:   #ddd;
+
+@nav-tabs-justified-link-border-color:            #ddd;
+@nav-tabs-justified-active-link-border-color:     @body-bg;
+
+//== Pills
+@nav-pills-border-radius:                   @border-radius-base;
+@nav-pills-active-link-hover-bg:            @component-active-bg;
+@nav-pills-active-link-hover-color:         @component-active-color;
+
+
+//== Pagination
+//
+//##
+
+@pagination-color:                     @link-color;
+@pagination-bg:                        #fff;
+@pagination-border:                    #ddd;
+
+@pagination-hover-color:               @link-hover-color;
+@pagination-hover-bg:                  @gray-lighter;
+@pagination-hover-border:              #ddd;
+
+@pagination-active-color:              #fff;
+@pagination-active-bg:                 @brand-primary;
+@pagination-active-border:             @brand-primary;
+
+@pagination-disabled-color:            @gray-light;
+@pagination-disabled-bg:               #fff;
+@pagination-disabled-border:           #ddd;
+
+
+//== Pager
+//
+//##
+
+@pager-bg:                             @pagination-bg;
+@pager-border:                         @pagination-border;
+@pager-border-radius:                  15px;
+
+@pager-hover-bg:                       @pagination-hover-bg;
+
+@pager-active-bg:                      @pagination-active-bg;
+@pager-active-color:                   @pagination-active-color;
+
+@pager-disabled-color:                 @pagination-disabled-color;
+
+
+//== Jumbotron
+//
+//##
+
+@jumbotron-padding:              30px;
+@jumbotron-color:                inherit;
+@jumbotron-bg:                   @gray-lighter;
+@jumbotron-heading-color:        inherit;
+@jumbotron-font-size:            ceil((@font-size-base * 1.5));
+
+
+//== Form states and alerts
+//
+//## Define colors for form feedback states and, by default, alerts.
+
+@state-success-text:             #3c763d;
+@state-success-bg:               #dff0d8;
+@state-success-border:           darken(spin(@state-success-bg, -10), 5%);
+
+@state-info-text:                #31708f;
+@state-info-bg:                  #d9edf7;
+@state-info-border:              darken(spin(@state-info-bg, -10), 7%);
+
+@state-warning-text:             #8a6d3b;
+@state-warning-bg:               #fcf8e3;
+@state-warning-border:           darken(spin(@state-warning-bg, -10), 5%);
+
+@state-danger-text:              #a94442;
+@state-danger-bg:                #f2dede;
+@state-danger-border:            darken(spin(@state-danger-bg, -10), 5%);
+
+
+//== Tooltips
+//
+//##
+
+//** Tooltip max width
+@tooltip-max-width:           200px;
+//** Tooltip text color
+@tooltip-color:               #fff;
+//** Tooltip background color
+@tooltip-bg:                  #000;
+@tooltip-opacity:             .9;
+
+//** Tooltip arrow width
+@tooltip-arrow-width:         5px;
+//** Tooltip arrow color
+@tooltip-arrow-color:         @tooltip-bg;
+
+
+//== Popovers
+//
+//##
+
+//** Popover body background color
+@popover-bg:                          #fff;
+//** Popover maximum width
+@popover-max-width:                   276px;
+//** Popover border color
+@popover-border-color:                rgba(0,0,0,.2);
+//** Popover fallback border color
+@popover-fallback-border-color:       #ccc;
+
+//** Popover title background color
+@popover-title-bg:                    darken(@popover-bg, 3%);
+
+//** Popover arrow width
+@popover-arrow-width:                 10px;
+//** Popover arrow color
+@popover-arrow-color:                 @popover-bg;
+
+//** Popover outer arrow width
+@popover-arrow-outer-width:           (@popover-arrow-width + 1);
+//** Popover outer arrow color
+@popover-arrow-outer-color:           fadein(@popover-border-color, 5%);
+//** Popover outer arrow fallback color
+@popover-arrow-outer-fallback-color:  darken(@popover-fallback-border-color, 20%);
+
+
+//== Labels
+//
+//##
+
+//** Default label background color
+@label-default-bg:            @gray-light;
+//** Primary label background color
+@label-primary-bg:            @brand-primary;
+//** Success label background color
+@label-success-bg:            @brand-success;
+//** Info label background color
+@label-info-bg:               @brand-info;
+//** Warning label background color
+@label-warning-bg:            @brand-warning;
+//** Danger label background color
+@label-danger-bg:             @brand-danger;
+
+//** Default label text color
+@label-color:                 #fff;
+//** Default text color of a linked label
+@label-link-hover-color:      #fff;
+
+
+//== Modals
+//
+//##
+
+//** Padding applied to the modal body
+@modal-inner-padding:         15px;
+
+//** Padding applied to the modal title
+@modal-title-padding:         15px;
+//** Modal title line-height
+@modal-title-line-height:     @line-height-base;
+
+//** Background color of modal content area
+@modal-content-bg:                             #fff;
+//** Modal content border color
+@modal-content-border-color:                   rgba(0,0,0,.2);
+//** Modal content border color **for IE8**
+@modal-content-fallback-border-color:          #999;
+
+//** Modal backdrop background color
+@modal-backdrop-bg:           #000;
+//** Modal backdrop opacity
+@modal-backdrop-opacity:      .5;
+//** Modal header border color
+@modal-header-border-color:   #e5e5e5;
+//** Modal footer border color
+@modal-footer-border-color:   @modal-header-border-color;
+
+@modal-lg:                    900px;
+@modal-md:                    600px;
+@modal-sm:                    300px;
+
+
+//== Alerts
+//
+//## Define alert colors, border radius, and padding.
+
+@alert-padding:               15px;
+@alert-border-radius:         @border-radius-base;
+@alert-link-font-weight:      bold;
+
+@alert-success-bg:            @state-success-bg;
+@alert-success-text:          @state-success-text;
+@alert-success-border:        @state-success-border;
+
+@alert-info-bg:               @state-info-bg;
+@alert-info-text:             @state-info-text;
+@alert-info-border:           @state-info-border;
+
+@alert-warning-bg:            @state-warning-bg;
+@alert-warning-text:          @state-warning-text;
+@alert-warning-border:        @state-warning-border;
+
+@alert-danger-bg:             @state-danger-bg;
+@alert-danger-text:           @state-danger-text;
+@alert-danger-border:         @state-danger-border;
+
+
+//== Progress bars
+//
+//##
+
+//** Background color of the whole progress component
+@progress-bg:                 #f5f5f5;
+//** Progress bar text color
+@progress-bar-color:          #fff;
+//** Variable for setting rounded corners on progress bar.
+@progress-border-radius:      @border-radius-base;
+
+//** Default progress bar color
+@progress-bar-bg:             @brand-primary;
+//** Success progress bar color
+@progress-bar-success-bg:     @brand-success;
+//** Warning progress bar color
+@progress-bar-warning-bg:     @brand-warning;
+//** Danger progress bar color
+@progress-bar-danger-bg:      @brand-danger;
+//** Info progress bar color
+@progress-bar-info-bg:        @brand-info;
+
+
+//== List group
+//
+//##
+
+//** Background color on `.list-group-item`
+@list-group-bg:                 #fff;
+//** `.list-group-item` border color
+@list-group-border:             #ddd;
+//** List group border radius
+@list-group-border-radius:      @border-radius-base;
+
+//** Background color of single list items on hover
+@list-group-hover-bg:           #f5f5f5;
+//** Text color of active list items
+@list-group-active-color:       @component-active-color;
+//** Background color of active list items
+@list-group-active-bg:          @component-active-bg;
+//** Border color of active list elements
+@list-group-active-border:      @list-group-active-bg;
+//** Text color for content within active list items
+@list-group-active-text-color:  lighten(@list-group-active-bg, 40%);
+
+//** Text color of disabled list items
+@list-group-disabled-color:      @gray-light;
+//** Background color of disabled list items
+@list-group-disabled-bg:         @gray-lighter;
+//** Text color for content within disabled list items
+@list-group-disabled-text-color: @list-group-disabled-color;
+
+@list-group-link-color:         #555;
+@list-group-link-hover-color:   @list-group-link-color;
+@list-group-link-heading-color: #333;
+
+
+//== Panels
+//
+//##
+
+@panel-bg:                    #fff;
+@panel-body-padding:          15px;
+@panel-heading-padding:       10px 15px;
+@panel-footer-padding:        @panel-heading-padding;
+@panel-border-radius:         @border-radius-base;
+
+//** Border color for elements within panels
+@panel-inner-border:          #ddd;
+@panel-footer-bg:             #f5f5f5;
+
+@panel-default-text:          @gray-dark;
+@panel-default-border:        #ddd;
+@panel-default-heading-bg:    #f5f5f5;
+
+@panel-primary-text:          #fff;
+@panel-primary-border:        @brand-primary;
+@panel-primary-heading-bg:    @brand-primary;
+
+@panel-success-text:          @state-success-text;
+@panel-success-border:        @state-success-border;
+@panel-success-heading-bg:    @state-success-bg;
+
+@panel-info-text:             @state-info-text;
+@panel-info-border:           @state-info-border;
+@panel-info-heading-bg:       @state-info-bg;
+
+@panel-warning-text:          @state-warning-text;
+@panel-warning-border:        @state-warning-border;
+@panel-warning-heading-bg:    @state-warning-bg;
+
+@panel-danger-text:           @state-danger-text;
+@panel-danger-border:         @state-danger-border;
+@panel-danger-heading-bg:     @state-danger-bg;
+
+
+//== Thumbnails
+//
+//##
+
+//** Padding around the thumbnail image
+@thumbnail-padding:           4px;
+//** Thumbnail background color
+@thumbnail-bg:                @body-bg;
+//** Thumbnail border color
+@thumbnail-border:            #ddd;
+//** Thumbnail border radius
+@thumbnail-border-radius:     @border-radius-base;
+
+//** Custom text color for thumbnail captions
+@thumbnail-caption-color:     @text-color;
+//** Padding around the thumbnail caption
+@thumbnail-caption-padding:   9px;
+
+
+//== Wells
+//
+//##
+
+@well-bg:                     #f5f5f5;
+@well-border:                 darken(@well-bg, 7%);
+
+
+//== Badges
+//
+//##
+
+@badge-color:                 #fff;
+//** Linked badge text color on hover
+@badge-link-hover-color:      #fff;
+@badge-bg:                    @gray-light;
+
+//** Badge text color in active nav link
+@badge-active-color:          @link-color;
+//** Badge background color in active nav link
+@badge-active-bg:             #fff;
+
+@badge-font-weight:           bold;
+@badge-line-height:           1;
+@badge-border-radius:         10px;
+
+
+//== Breadcrumbs
+//
+//##
+
+@breadcrumb-padding-vertical:   8px;
+@breadcrumb-padding-horizontal: 15px;
+//** Breadcrumb background color
+@breadcrumb-bg:                 #f5f5f5;
+//** Breadcrumb text color
+@breadcrumb-color:              #ccc;
+//** Text color of current page in the breadcrumb
+@breadcrumb-active-color:       @gray-light;
+//** Textual separator for between breadcrumb elements
+@breadcrumb-separator:          "/";
+
+
+//== Carousel
+//
+//##
+
+@carousel-text-shadow:                        0 1px 2px rgba(0,0,0,.6);
+
+@carousel-control-color:                      #fff;
+@carousel-control-width:                      15%;
+@carousel-control-opacity:                    .5;
+@carousel-control-font-size:                  20px;
+
+@carousel-indicator-active-bg:                #fff;
+@carousel-indicator-border-color:             #fff;
+
+@carousel-caption-color:                      #fff;
+
+
+//== Close
+//
+//##
+
+@close-font-weight:           bold;
+@close-color:                 #000;
+@close-text-shadow:           0 1px 0 #fff;
+
+
+//== Code
+//
+//##
+
+@code-color:                  #c7254e;
+@code-bg:                     #f9f2f4;
+
+@kbd-color:                   #fff;
+@kbd-bg:                      #333;
+
+@pre-bg:                      #f5f5f5;
+@pre-color:                   @gray-dark;
+@pre-border-color:            #ccc;
+@pre-scrollable-max-height:   340px;
+
+
+//== Type
+//
+//##
+
+//** Horizontal offset for forms and lists.
+@component-offset-horizontal: 180px;
+//** Text muted color
+@text-muted:                  @gray-light;
+//** Abbreviations and acronyms border color
+@abbr-border-color:           @gray-light;
+//** Headings small color
+@headings-small-color:        @gray-light;
+//** Blockquote small color
+@blockquote-small-color:      @gray-light;
+//** Blockquote font size
+@blockquote-font-size:        (@font-size-base * 1.25);
+//** Blockquote border color
+@blockquote-border-color:     @gray-lighter;
+//** Page header border color
+@page-header-border-color:    @gray-lighter;
+//** Width of horizontal description list titles
+@dl-horizontal-offset:        @component-offset-horizontal;
+//** Horizontal line color.
+@hr-border:                   @gray-lighter;
diff --git a/3rdparty/fmt/doc/bootstrap/wells.less b/3rdparty/fmt/doc/bootstrap/wells.less
new file mode 100644
index 00000000..15d072b0
--- /dev/null
+++ b/3rdparty/fmt/doc/bootstrap/wells.less
@@ -0,0 +1,29 @@
+//
+// Wells
+// --------------------------------------------------
+
+
+// Base class
+.well {
+  min-height: 20px;
+  padding: 19px;
+  margin-bottom: 20px;
+  background-color: @well-bg;
+  border: 1px solid @well-border;
+  border-radius: @border-radius-base;
+  .box-shadow(inset 0 1px 1px rgba(0,0,0,.05));
+  blockquote {
+    border-color: #ddd;
+    border-color: rgba(0,0,0,.15);
+  }
+}
+
+// Sizes
+.well-lg {
+  padding: 24px;
+  border-radius: @border-radius-large;
+}
+.well-sm {
+  padding: 9px;
+  border-radius: @border-radius-small;
+}
diff --git a/3rdparty/fmt/doc/build.py b/3rdparty/fmt/doc/build.py
new file mode 100644
index 00000000..ae1ccfc8
--- /dev/null
+++ b/3rdparty/fmt/doc/build.py
@@ -0,0 +1,118 @@
+#!/usr/bin/env python3
+# Build the documentation.
+
+import errno, os, re, sys
+from subprocess import check_call, CalledProcessError, Popen, PIPE, STDOUT
+
+versions = ['1.0.0', '1.1.0', '2.0.0', '3.0.2', '4.0.0', '4.1.0', '5.0.0', '5.1.0', '5.2.0', '5.2.1', '5.3.0', '6.0.0', '6.1.0', '6.1.1', '6.1.2', '6.2.0', '6.2.1', '7.0.0', '7.0.1', '7.0.2', '7.0.3', '7.1.0', '7.1.1', '7.1.2', '7.1.3', '8.0.0', '8.0.1', '8.1.0', '8.1.1']
+
+class Pip:
+  def __init__(self, venv_dir):
+    self.path = os.path.join(venv_dir, 'bin', 'pip')
+
+  def install(self, package, commit=None):
+    "Install package using pip."
+    if commit:
+      package = 'git+https://github.com/{0}.git@{1}'.format(package, commit)
+    print('Installing {0}'.format(package))
+    check_call([self.path, 'install', package])
+
+def create_build_env(venv_dir='virtualenv'):
+  # Create virtualenv.
+  if not os.path.exists(venv_dir):
+    check_call(['python3', '-m', 'venv', venv_dir])
+  # Install Sphinx and Breathe. Require the exact version of Sphinx which is
+  # compatible with Breathe.
+  pip = Pip(venv_dir)
+  pip.install('wheel')
+  pip.install('six')
+  # See: https://github.com/sphinx-doc/sphinx/issues/9777
+  pip.install('docutils==0.17.1')
+  pip.install('sphinx-doc/sphinx', 'v3.3.0')
+  pip.install('michaeljones/breathe', 'v4.25.0')
+
+def build_docs(version='dev', **kwargs):
+  doc_dir = kwargs.get('doc_dir', os.path.dirname(os.path.realpath(__file__)))
+  work_dir = kwargs.get('work_dir', '.')
+  include_dir = kwargs.get(
+      'include_dir', os.path.join(os.path.dirname(doc_dir), 'include', 'fmt'))
+  # Build docs.
+  cmd = ['doxygen', '-']
+  p = Popen(cmd, stdin=PIPE, stdout=PIPE, stderr=STDOUT)
+  doxyxml_dir = os.path.join(work_dir, 'doxyxml')
+  out, _ = p.communicate(input=r'''
+      PROJECT_NAME      = fmt
+      GENERATE_LATEX    = NO
+      GENERATE_MAN      = NO
+      GENERATE_RTF      = NO
+      CASE_SENSE_NAMES  = NO
+      INPUT             = {0}/chrono.h {0}/color.h {0}/core.h {0}/compile.h \
+                          {0}/format.h {0}/os.h {0}/ostream.h {0}/printf.h \
+                          {0}/xchar.h
+      QUIET             = YES
+      JAVADOC_AUTOBRIEF = YES
+      AUTOLINK_SUPPORT  = NO
+      GENERATE_HTML     = NO
+      GENERATE_XML      = YES
+      XML_OUTPUT        = {1}
+      ALIASES           = "rst=\verbatim embed:rst"
+      ALIASES          += "endrst=\endverbatim"
+      MACRO_EXPANSION   = YES
+      PREDEFINED        = _WIN32=1 \
+                          __linux__=1 \
+                          FMT_ENABLE_IF(...)= \
+                          FMT_USE_VARIADIC_TEMPLATES=1 \
+                          FMT_USE_RVALUE_REFERENCES=1 \
+                          FMT_USE_USER_DEFINED_LITERALS=1 \
+                          FMT_USE_ALIAS_TEMPLATES=1 \
+                          FMT_API= \
+                          "FMT_BEGIN_NAMESPACE=namespace fmt {{" \
+                          "FMT_END_NAMESPACE=}}" \
+                          "FMT_STRING_ALIAS=1" \
+                          "FMT_VARIADIC(...)=" \
+                          "FMT_VARIADIC_W(...)=" \
+                          "FMT_DOC=1"
+      EXCLUDE_SYMBOLS   = fmt::formatter fmt::printf_formatter fmt::arg_join \
+                          fmt::basic_format_arg::handle
+    '''.format(include_dir, doxyxml_dir).encode('UTF-8'))
+  out = out.decode('utf-8')
+  internal_symbols = [
+    'fmt::detail::.*',
+    'basic_data<>',
+    'fmt::type_identity',
+    'fmt::dynamic_formatter'
+  ]
+  noisy_warnings = [
+    'warning: (Compound|Member .* of class) (' + '|'.join(internal_symbols) + \
+      ') is not documented.',
+    'warning: Internal inconsistency: .* does not belong to any container!'
+  ]
+  for w in noisy_warnings:
+      out = re.sub('.*' + w + '\n', '', out)
+  print(out)
+  if p.returncode != 0:
+    raise CalledProcessError(p.returncode, cmd)
+
+  html_dir = os.path.join(work_dir, 'html')
+  main_versions = reversed(versions[-3:])
+  check_call([os.path.join(work_dir, 'virtualenv', 'bin', 'sphinx-build'),
+              '-Dbreathe_projects.format=' + os.path.abspath(doxyxml_dir),
+              '-Dversion=' + version, '-Drelease=' + version,
+              '-Aversion=' + version, '-Aversions=' + ','.join(main_versions),
+              '-b', 'html', doc_dir, html_dir])
+  try:
+    check_call(['lessc', '--verbose', '--clean-css',
+                '--include-path=' + os.path.join(doc_dir, 'bootstrap'),
+                os.path.join(doc_dir, 'fmt.less'),
+                os.path.join(html_dir, '_static', 'fmt.css')])
+  except OSError as e:
+    if e.errno != errno.ENOENT:
+      raise
+    print('lessc not found; make sure that Less (http://lesscss.org/) ' +
+          'is installed')
+    sys.exit(1)
+  return html_dir
+
+if __name__ == '__main__':
+  create_build_env()
+  build_docs(sys.argv[1])
diff --git a/3rdparty/fmt/doc/conf.py b/3rdparty/fmt/doc/conf.py
new file mode 100644
index 00000000..0756192b
--- /dev/null
+++ b/3rdparty/fmt/doc/conf.py
@@ -0,0 +1,256 @@
+# -*- coding: utf-8 -*-
+#
+# format documentation build configuration file, created by
+# sphinx-quickstart on Tue Dec 18 06:46:16 2012.
+#
+# This file is execfile()d with the current directory set to its containing dir.
+#
+# Note that not all possible configuration values are present in this
+# autogenerated file.
+#
+# All configuration values have a default; values that are commented out
+# serve to show the default.
+
+import sys, os, re, subprocess
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#sys.path.insert(0, os.path.abspath('.'))
+
+# -- General configuration -----------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+needs_sphinx = '1.2'
+
+if os.environ.get('READTHEDOCS', None) == 'True':
+  subprocess.call('doxygen')
+
+# Add any Sphinx extension module names here, as strings. They can be extensions
+# coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
+extensions = ['sphinx.ext.ifconfig', 'breathe']
+
+breathe_default_project = "format"
+breathe_domain_by_extension = {"h" : "cpp"}
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# The suffix of source filenames.
+source_suffix = '.rst'
+
+# The encoding of source files.
+#source_encoding = 'utf-8-sig'
+
+# The master toctree document.
+#master_doc = 'contents'
+
+# General information about the project.
+project = u'fmt'
+copyright = u'2012-present, Victor Zverovich'
+
+# The version info for the project you're documenting, acts as replacement for
+# |version| and |release|, also used in various other places throughout the
+# built documents.
+#
+# The short X.Y version.
+
+# Version and release are passed from CMake.
+#version = None
+
+# The full version, including alpha/beta/rc tags.
+#release = version
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#language = None
+
+# There are two options for replacing |today|: either, you set today to some
+# non-false value, then it is used:
+#today = ''
+# Else, today_fmt is used as the format for a strftime call.
+#today_fmt = '%B %d, %Y'
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+exclude_patterns = ['virtualenv']
+
+# The reST default role (used for this markup: `text`) to use for all documents.
+default_role = 'cpp:any'
+
+# If true, '()' will be appended to :func: etc. cross-reference text.
+#add_function_parentheses = True
+
+# If true, the current module name will be prepended to all description
+# unit titles (such as .. function::).
+#add_module_names = True
+
+# If true, sectionauthor and moduleauthor directives will be shown in the
+# output. They are ignored by default.
+#show_authors = False
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = 'sphinx'
+
+highlight_language = 'c++'
+
+primary_domain = 'cpp'
+
+# A list of ignored prefixes for module index sorting.
+#modindex_common_prefix = []
+
+
+# -- Options for HTML output ---------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+html_theme = 'basic-bootstrap'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+#html_theme_options = {}
+
+# Add any paths that contain custom themes here, relative to this directory.
+html_theme_path = ['.']
+
+# The name for this set of Sphinx documents.  If None, it defaults to
+# "<project> v<release> documentation".
+#html_title = None
+
+# A shorter title for the navigation bar.  Default is the same as html_title.
+#html_short_title = None
+
+# The name of an image file (relative to this directory) to place at the top
+# of the sidebar.
+#html_logo = None
+
+# The name of an image file (within the static path) to use as favicon of the
+# docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
+# pixels large.
+#html_favicon = None
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
+
+# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
+# using the given strftime format.
+#html_last_updated_fmt = '%b %d, %Y'
+
+# If true, SmartyPants will be used to convert quotes and dashes to
+# typographically correct entities.
+#html_use_smartypants = True
+
+# Custom sidebar templates, maps document names to template names.
+html_sidebars = {
+  '**': ['localtoc.html', 'relations.html', 'sourcelink.html', 'searchbox.html']
+}
+
+# Additional templates that should be rendered to pages, maps page names to
+# template names.
+#html_additional_pages = {}
+
+# If false, no module index is generated.
+#html_domain_indices = True
+
+# If false, no index is generated.
+#html_use_index = True
+
+# If true, the index is split into individual pages for each letter.
+#html_split_index = False
+
+# If true, links to the reST sources are added to the pages.
+#html_show_sourcelink = True
+
+# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
+#html_show_sphinx = True
+
+# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
+#html_show_copyright = True
+
+# If true, an OpenSearch description file will be output, and all pages will
+# contain a <link> tag referring to it.  The value of this option must be the
+# base URL from which the finished HTML is served.
+#html_use_opensearch = ''
+
+# This is the file name suffix for HTML files (e.g. ".xhtml").
+#html_file_suffix = None
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'formatdoc'
+
+
+# -- Options for LaTeX output --------------------------------------------------
+
+latex_elements = {
+# The paper size ('letterpaper' or 'a4paper').
+#'papersize': 'letterpaper',
+
+# The font size ('10pt', '11pt' or '12pt').
+#'pointsize': '10pt',
+
+# Additional stuff for the LaTeX preamble.
+#'preamble': '',
+}
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title, author, documentclass [howto/manual]).
+latex_documents = [
+  ('index', 'format.tex', u'fmt documentation',
+   u'Victor Zverovich', 'manual'),
+]
+
+# The name of an image file (relative to this directory) to place at the top of
+# the title page.
+#latex_logo = None
+
+# For "manual" documents, if this is true, then toplevel headings are parts,
+# not chapters.
+#latex_use_parts = False
+
+# If true, show page references after internal links.
+#latex_show_pagerefs = False
+
+# If true, show URL addresses after external links.
+#latex_show_urls = False
+
+# Documents to append as an appendix to all manuals.
+#latex_appendices = []
+
+# If false, no module index is generated.
+#latex_domain_indices = True
+
+
+# -- Options for manual page output --------------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('index', 'fmt', u'fmt documentation', [u'Victor Zverovich'], 1)
+]
+
+# If true, show URL addresses after external links.
+#man_show_urls = False
+
+
+# -- Options for Texinfo output ------------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+  ('index', 'fmt', u'fmt documentation',
+   u'Victor Zverovich', 'fmt', 'One line description of project.',
+   'Miscellaneous'),
+]
+
+# Documents to append as an appendix to all manuals.
+#texinfo_appendices = []
+
+# If false, no module index is generated.
+#texinfo_domain_indices = True
+
+# How to display URL addresses: 'footnote', 'no', or 'inline'.
+#texinfo_show_urls = 'footnote'
diff --git a/3rdparty/fmt/doc/contents.rst b/3rdparty/fmt/doc/contents.rst
new file mode 100644
index 00000000..d38691e4
--- /dev/null
+++ b/3rdparty/fmt/doc/contents.rst
@@ -0,0 +1,10 @@
+########
+Contents
+########
+
+.. toctree::
+   :maxdepth: 2
+
+   usage
+   api
+   syntax
diff --git a/3rdparty/fmt/doc/fmt.less b/3rdparty/fmt/doc/fmt.less
new file mode 100644
index 00000000..3a97b9fd
--- /dev/null
+++ b/3rdparty/fmt/doc/fmt.less
@@ -0,0 +1,71 @@
+@import 'bootstrap.less';
+
+@header-bg: #094d75;
+@icon-font-path: "fonts/";
+
+html {
+  overflow-y: scroll;
+}
+
+.navbar {
+  border-radius: 0;
+  margin-bottom: 0;
+  background-color: darken(@header-bg, 10%);
+}
+
+.jumbotron {
+  #gradient > .vertical(@header-bg; darken(@header-bg, 2%); 50%; 50%);
+  background-size: 100% 4px;
+  background-color: @header-bg;
+  background-repeat: repeat-y;
+  color: white;
+  text-align: center;
+}
+
+div.sphinxsidebar {
+  margin-left: 0;
+}
+
+// Keep content not too wide for better readability.
+.navbar-content, .content {
+  .make-md-column-offset(1);
+  .make-md-column(10);
+  .make-lg-column-offset(2);
+  .make-lg-column(8);
+}
+
+.footer {
+  padding-top: 20px;
+  padding-bottom: 20px;
+  border-top: 1px solid @gray-lighter;
+  text-align: center;
+}
+
+// Indent descriptions of classes, functions and macros.
+.class dd, .function dd, .macro dd {
+  margin-left: 20px;
+}
+
+// Remove Bootstrap padding for Sphinx containers.
+.breathe-sectiondef.container {
+  padding: 0;
+}
+
+// Remove Bootstrap padding for Sphinx code elements in API signatures.
+.descclassname, .descname {
+  padding: 0;
+}
+
+// Override center alignment in tables.
+td {
+  text-align: left;
+}
+
+p.rubric {
+  margin-top: 10px;
+}
+
+.github-btn {
+  border: 0;
+  overflow: hidden;
+}
diff --git a/3rdparty/fmt/doc/index.rst b/3rdparty/fmt/doc/index.rst
new file mode 100644
index 00000000..92221225
--- /dev/null
+++ b/3rdparty/fmt/doc/index.rst
@@ -0,0 +1,198 @@
+Overview
+========
+
+**{fmt}** is an open-source formatting library providing a fast and safe
+alternative to C stdio and C++ iostreams.
+
+.. raw:: html
+
+   <div class="panel panel-default">
+     <div class="panel-heading">What users say:</div>
+     <div class="panel-body">
+       Thanks for creating this library. It’s been a hole in C++ for
+       a long time. I’ve used both <code>boost::format</code> and
+       <code>loki::SPrintf</code>, and neither felt like the right answer.
+       This does.
+     </div>
+   </div>
+
+.. _format-api-intro:
+
+Format API
+----------
+
+The format API is similar in spirit to the C ``printf`` family of function but
+is safer, simpler and several times `faster
+<https://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html>`_
+than common standard library implementations.
+The `format string syntax <syntax.html>`_ is similar to the one used by
+`str.format <https://docs.python.org/3/library/stdtypes.html#str.format>`_ in
+Python:
+
+.. code:: c++
+
+  std::string s = fmt::format("The answer is {}.", 42);
+  
+The ``fmt::format`` function returns a string "The answer is 42.". You can use
+``fmt::memory_buffer`` to avoid constructing ``std::string``:
+
+.. code:: c++
+
+  auto out = fmt::memory_buffer();
+  format_to(std::back_inserter(out),
+            "For a moment, {} happened.", "nothing");
+  auto data = out.data(); // pointer to the formatted data
+  auto size = out.size(); // size of the formatted data
+
+The ``fmt::print`` function performs formatting and writes the result to a stream:
+
+.. code:: c++
+
+  fmt::print(stderr, "System error code = {}\n", errno);
+
+If you omit the file argument the function will print to ``stdout``:
+
+.. code:: c++
+
+  fmt::print("Don't {}\n", "panic");
+
+The format API also supports positional arguments useful for localization:
+
+.. code:: c++
+
+  fmt::print("I'd rather be {1} than {0}.", "right", "happy");
+
+You can pass named arguments with ``fmt::arg``:
+
+.. code:: c++
+
+  fmt::print("Hello, {name}! The answer is {number}. Goodbye, {name}.",
+             fmt::arg("name", "World"), fmt::arg("number", 42));
+
+If your compiler supports C++11 user-defined literals, the suffix ``_a`` offers 
+an alternative, slightly terser syntax for named arguments:
+
+.. code:: c++
+
+  using namespace fmt::literals;
+  fmt::print("Hello, {name}! The answer is {number}. Goodbye, {name}.",
+             "name"_a="World", "number"_a=42);
+
+.. _safety:
+
+Safety
+------
+
+The library is fully type safe, automatic memory management prevents buffer
+overflow, errors in format strings are reported using exceptions or at compile
+time. For example, the code
+
+.. code:: c++
+
+  fmt::format("The answer is {:d}", "forty-two");
+
+throws the ``format_error`` exception because the argument ``"forty-two"`` is a
+string while the format code ``d`` only applies to integers.
+
+The code
+
+.. code:: c++
+
+  format(FMT_STRING("The answer is {:d}"), "forty-two");
+
+reports a compile-time error on compilers that support relaxed ``constexpr``.
+See `here <api.html#c.fmt>`_ for details.
+
+The following code
+
+.. code:: c++
+
+  fmt::format("Cyrillic letter {}", L'\x42e');
+  
+produces a compile-time error because wide character ``L'\x42e'`` cannot be
+formatted into a narrow string. For comparison, writing a wide character to
+``std::ostream`` results in its numeric value being written to the stream
+(i.e. 1070 instead of letter 'ю' which is represented by ``L'\x42e'`` if we
+use Unicode) which is rarely desirable.
+
+Compact Binary Code
+-------------------
+
+The library produces compact per-call compiled code. For example
+(`godbolt <https://godbolt.org/g/TZU4KF>`_),
+
+.. code:: c++
+
+   #include <fmt/core.h>
+
+   int main() {
+     fmt::print("The answer is {}.", 42);
+   }
+
+compiles to just
+
+.. code:: asm
+
+   main: # @main
+     sub rsp, 24
+     mov qword ptr [rsp], 42
+     mov rcx, rsp
+     mov edi, offset .L.str
+     mov esi, 17
+     mov edx, 1
+     call fmt::v7::vprint(fmt::v7::basic_string_view<char>, fmt::v7::format_args)
+     xor eax, eax
+     add rsp, 24
+     ret
+   .L.str:
+     .asciz "The answer is {}."
+
+.. _portability:
+
+Portability
+-----------
+
+The library is highly portable and relies only on a small set of C++11 features:
+
+* variadic templates
+* type traits
+* rvalue references
+* decltype
+* trailing return types
+* deleted functions
+* alias templates
+
+These are available in GCC 4.8, Clang 3.4, MSVC 19.0 (2015) and more recent
+compiler version. For older compilers use {fmt} `version 4.x
+<https://github.com/fmtlib/fmt/releases/tag/4.1.0>`_ which is maintained and
+only requires C++98.
+
+The output of all formatting functions is consistent across platforms.
+For example,
+
+.. code::
+
+  fmt::print("{}", std::numeric_limits<double>::infinity());
+
+always prints ``inf`` while the output of ``printf`` is platform-dependent.
+
+.. _ease-of-use:
+
+Ease of Use
+-----------
+
+{fmt} has a small self-contained code base with the core library consisting of
+just three header files and no external dependencies.
+A permissive MIT `license <https://github.com/fmtlib/fmt#license>`_ allows
+using the library both in open-source and commercial projects.
+
+`Learn more... <contents.html>`_
+
+.. raw:: html
+
+  <a class="btn btn-success" href="https://github.com/fmtlib/fmt">GitHub Repository</a>
+
+  <div class="section footer">
+    <iframe src="https://ghbtns.com/github-btn.html?user=fmtlib&amp;repo=fmt&amp;type=watch&amp;count=true"
+            class="github-btn" width="100" height="20"></iframe>
+  </div>
diff --git a/3rdparty/fmt/doc/python-license.txt b/3rdparty/fmt/doc/python-license.txt
new file mode 100644
index 00000000..88eed1f9
--- /dev/null
+++ b/3rdparty/fmt/doc/python-license.txt
@@ -0,0 +1,290 @@
+A. HISTORY OF THE SOFTWARE
+==========================
+
+Python was created in the early 1990s by Guido van Rossum at Stichting
+Mathematisch Centrum (CWI, see http://www.cwi.nl) in the Netherlands
+as a successor of a language called ABC.  Guido remains Python's
+principal author, although it includes many contributions from others.
+
+In 1995, Guido continued his work on Python at the Corporation for
+National Research Initiatives (CNRI, see http://www.cnri.reston.va.us)
+in Reston, Virginia where he released several versions of the
+software.
+
+In May 2000, Guido and the Python core development team moved to
+BeOpen.com to form the BeOpen PythonLabs team.  In October of the same
+year, the PythonLabs team moved to Digital Creations (now Zope
+Corporation, see http://www.zope.com).  In 2001, the Python Software
+Foundation (PSF, see http://www.python.org/psf/) was formed, a
+non-profit organization created specifically to own Python-related
+Intellectual Property.  Zope Corporation is a sponsoring member of
+the PSF.
+
+All Python releases are Open Source (see http://www.opensource.org for
+the Open Source Definition).  Historically, most, but not all, Python
+releases have also been GPL-compatible; the table below summarizes
+the various releases.
+
+    Release         Derived     Year        Owner       GPL-
+                    from                                compatible? (1)
+
+    0.9.0 thru 1.2              1991-1995   CWI         yes
+    1.3 thru 1.5.2  1.2         1995-1999   CNRI        yes
+    1.6             1.5.2       2000        CNRI        no
+    2.0             1.6         2000        BeOpen.com  no
+    1.6.1           1.6         2001        CNRI        yes (2)
+    2.1             2.0+1.6.1   2001        PSF         no
+    2.0.1           2.0+1.6.1   2001        PSF         yes
+    2.1.1           2.1+2.0.1   2001        PSF         yes
+    2.2             2.1.1       2001        PSF         yes
+    2.1.2           2.1.1       2002        PSF         yes
+    2.1.3           2.1.2       2002        PSF         yes
+    2.2.1           2.2         2002        PSF         yes
+    2.2.2           2.2.1       2002        PSF         yes
+    2.2.3           2.2.2       2003        PSF         yes
+    2.3             2.2.2       2002-2003   PSF         yes
+    2.3.1           2.3         2002-2003   PSF         yes
+    2.3.2           2.3.1       2002-2003   PSF         yes
+    2.3.3           2.3.2       2002-2003   PSF         yes
+    2.3.4           2.3.3       2004        PSF         yes
+    2.3.5           2.3.4       2005        PSF         yes
+    2.4             2.3         2004        PSF         yes
+    2.4.1           2.4         2005        PSF         yes
+    2.4.2           2.4.1       2005        PSF         yes
+    2.4.3           2.4.2       2006        PSF         yes
+    2.4.4           2.4.3       2006        PSF         yes
+    2.5             2.4         2006        PSF         yes
+    2.5.1           2.5         2007        PSF         yes
+    2.5.2           2.5.1       2008        PSF         yes
+    2.5.3           2.5.2       2008        PSF         yes
+    2.6             2.5         2008        PSF         yes
+    2.6.1           2.6         2008        PSF         yes
+    2.6.2           2.6.1       2009        PSF         yes
+    2.6.3           2.6.2       2009        PSF         yes
+    2.6.4           2.6.3       2009        PSF         yes
+    2.6.5           2.6.4       2010        PSF         yes
+    3.0             2.6         2008        PSF         yes
+    3.0.1           3.0         2009        PSF         yes
+    3.1             3.0.1       2009        PSF         yes
+    3.1.1           3.1         2009        PSF         yes
+    3.1.2           3.1.1       2010        PSF         yes
+    3.1.3           3.1.2       2010        PSF         yes
+    3.1.4           3.1.3       2011        PSF         yes
+    3.2             3.1         2011        PSF         yes
+    3.2.1           3.2         2011        PSF         yes
+    3.2.2           3.2.1       2011        PSF         yes
+    3.2.3           3.2.2       2012        PSF         yes
+    3.3.0           3.2         2012        PSF         yes
+
+Footnotes:
+
+(1) GPL-compatible doesn't mean that we're distributing Python under
+    the GPL.  All Python licenses, unlike the GPL, let you distribute
+    a modified version without making your changes open source.  The
+    GPL-compatible licenses make it possible to combine Python with
+    other software that is released under the GPL; the others don't.
+
+(2) According to Richard Stallman, 1.6.1 is not GPL-compatible,
+    because its license has a choice of law clause.  According to
+    CNRI, however, Stallman's lawyer has told CNRI's lawyer that 1.6.1
+    is "not incompatible" with the GPL.
+
+Thanks to the many outside volunteers who have worked under Guido's
+direction to make these releases possible.
+
+
+B. TERMS AND CONDITIONS FOR ACCESSING OR OTHERWISE USING PYTHON
+===============================================================
+
+PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
+--------------------------------------------
+
+1. This LICENSE AGREEMENT is between the Python Software Foundation
+("PSF"), and the Individual or Organization ("Licensee") accessing and
+otherwise using this software ("Python") in source or binary form and
+its associated documentation.
+
+2. Subject to the terms and conditions of this License Agreement, PSF hereby
+grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce,
+analyze, test, perform and/or display publicly, prepare derivative works,
+distribute, and otherwise use Python alone or in any derivative version,
+provided, however, that PSF's License Agreement and PSF's notice of copyright,
+i.e., "Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
+2011, 2012 Python Software Foundation; All Rights Reserved" are retained in Python
+alone or in any derivative version prepared by Licensee.
+
+3. In the event Licensee prepares a derivative work that is based on
+or incorporates Python or any part thereof, and wants to make
+the derivative work available to others as provided herein, then
+Licensee hereby agrees to include in any such work a brief summary of
+the changes made to Python.
+
+4. PSF is making Python available to Licensee on an "AS IS"
+basis.  PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
+IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND
+DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
+FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOT
+INFRINGE ANY THIRD PARTY RIGHTS.
+
+5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
+FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
+A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON,
+OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
+
+6. This License Agreement will automatically terminate upon a material
+breach of its terms and conditions.
+
+7. Nothing in this License Agreement shall be deemed to create any
+relationship of agency, partnership, or joint venture between PSF and
+Licensee.  This License Agreement does not grant permission to use PSF
+trademarks or trade name in a trademark sense to endorse or promote
+products or services of Licensee, or any third party.
+
+8. By copying, installing or otherwise using Python, Licensee
+agrees to be bound by the terms and conditions of this License
+Agreement.
+
+
+BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0
+-------------------------------------------
+
+BEOPEN PYTHON OPEN SOURCE LICENSE AGREEMENT VERSION 1
+
+1. This LICENSE AGREEMENT is between BeOpen.com ("BeOpen"), having an
+office at 160 Saratoga Avenue, Santa Clara, CA 95051, and the
+Individual or Organization ("Licensee") accessing and otherwise using
+this software in source or binary form and its associated
+documentation ("the Software").
+
+2. Subject to the terms and conditions of this BeOpen Python License
+Agreement, BeOpen hereby grants Licensee a non-exclusive,
+royalty-free, world-wide license to reproduce, analyze, test, perform
+and/or display publicly, prepare derivative works, distribute, and
+otherwise use the Software alone or in any derivative version,
+provided, however, that the BeOpen Python License is retained in the
+Software, alone or in any derivative version prepared by Licensee.
+
+3. BeOpen is making the Software available to Licensee on an "AS IS"
+basis.  BEOPEN MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
+IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, BEOPEN MAKES NO AND
+DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
+FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE SOFTWARE WILL NOT
+INFRINGE ANY THIRD PARTY RIGHTS.
+
+4. BEOPEN SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF THE
+SOFTWARE FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS
+AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE SOFTWARE, OR ANY
+DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
+
+5. This License Agreement will automatically terminate upon a material
+breach of its terms and conditions.
+
+6. This License Agreement shall be governed by and interpreted in all
+respects by the law of the State of California, excluding conflict of
+law provisions.  Nothing in this License Agreement shall be deemed to
+create any relationship of agency, partnership, or joint venture
+between BeOpen and Licensee.  This License Agreement does not grant
+permission to use BeOpen trademarks or trade names in a trademark
+sense to endorse or promote products or services of Licensee, or any
+third party.  As an exception, the "BeOpen Python" logos available at
+http://www.pythonlabs.com/logos.html may be used according to the
+permissions granted on that web page.
+
+7. By copying, installing or otherwise using the software, Licensee
+agrees to be bound by the terms and conditions of this License
+Agreement.
+
+
+CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1
+---------------------------------------
+
+1. This LICENSE AGREEMENT is between the Corporation for National
+Research Initiatives, having an office at 1895 Preston White Drive,
+Reston, VA 20191 ("CNRI"), and the Individual or Organization
+("Licensee") accessing and otherwise using Python 1.6.1 software in
+source or binary form and its associated documentation.
+
+2. Subject to the terms and conditions of this License Agreement, CNRI
+hereby grants Licensee a nonexclusive, royalty-free, world-wide
+license to reproduce, analyze, test, perform and/or display publicly,
+prepare derivative works, distribute, and otherwise use Python 1.6.1
+alone or in any derivative version, provided, however, that CNRI's
+License Agreement and CNRI's notice of copyright, i.e., "Copyright (c)
+1995-2001 Corporation for National Research Initiatives; All Rights
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diff --git a/3rdparty/fmt/doc/syntax.rst b/3rdparty/fmt/doc/syntax.rst
new file mode 100644
index 00000000..9d3cb57c
--- /dev/null
+++ b/3rdparty/fmt/doc/syntax.rst
@@ -0,0 +1,487 @@
+.. _syntax:
+
+********************
+Format String Syntax
+********************
+
+Formatting functions such as :ref:`fmt::format() <format>` and
+:ref:`fmt::print() <print>` use the same format string syntax described in this
+section.
+
+Format strings contain "replacement fields" surrounded by curly braces ``{}``.
+Anything that is not contained in braces is considered literal text, which is
+copied unchanged to the output.  If you need to include a brace character in the
+literal text, it can be escaped by doubling: ``{{`` and ``}}``.
+
+The grammar for a replacement field is as follows:
+
+.. productionlist:: sf
+   replacement_field: "{" [`arg_id`] [":" (`format_spec` | `chrono_format_spec`)] "}"
+   arg_id: `integer` | `identifier`
+   integer: `digit`+
+   digit: "0"..."9"
+   identifier: `id_start` `id_continue`*
+   id_start: "a"..."z" | "A"..."Z" | "_"
+   id_continue: `id_start` | `digit`
+
+In less formal terms, the replacement field can start with an *arg_id*
+that specifies the argument whose value is to be formatted and inserted into
+the output instead of the replacement field.
+The *arg_id* is optionally followed by a *format_spec*, which is preceded by a
+colon ``':'``.  These specify a non-default format for the replacement value.
+
+See also the :ref:`formatspec` section.
+
+If the numerical arg_ids in a format string are 0, 1, 2, ... in sequence,
+they can all be omitted (not just some) and the numbers 0, 1, 2, ... will be
+automatically inserted in that order.
+
+Named arguments can be referred to by their names or indices.
+
+Some simple format string examples::
+
+   "First, thou shalt count to {0}" // References the first argument
+   "Bring me a {}"                  // Implicitly references the first argument
+   "From {} to {}"                  // Same as "From {0} to {1}"
+
+The *format_spec* field contains a specification of how the value should be
+presented, including such details as field width, alignment, padding, decimal
+precision and so on.  Each value type can define its own "formatting
+mini-language" or interpretation of the *format_spec*.
+
+Most built-in types support a common formatting mini-language, which is
+described in the next section.
+
+A *format_spec* field can also include nested replacement fields in certain
+positions within it. These nested replacement fields can contain only an
+argument id; format specifications are not allowed. This allows the formatting
+of a value to be dynamically specified.
+
+See the :ref:`formatexamples` section for some examples.
+
+.. _formatspec:
+
+Format Specification Mini-Language
+==================================
+
+"Format specifications" are used within replacement fields contained within a
+format string to define how individual values are presented (see
+:ref:`syntax`).  Each formattable type may define how the format
+specification is to be interpreted.
+
+Most built-in types implement the following options for format specifications,
+although some of the formatting options are only supported by the numeric types.
+
+The general form of a *standard format specifier* is:
+
+.. productionlist:: sf
+   format_spec: [[`fill`]`align`][`sign`]["#"]["0"][`width`]["." `precision`]["L"][`type`]
+   fill: <a character other than '{' or '}'>
+   align: "<" | ">" | "^"
+   sign: "+" | "-" | " "
+   width: `integer` | "{" [`arg_id`] "}"
+   precision: `integer` | "{" [`arg_id`] "}"
+   type: "a" | "A" | "b" | "B" | "c" | "d" | "e" | "E" | "f" | "F" | "g" | "G" |
+       : "o" | "p" | "s" | "x" | "X"
+
+The *fill* character can be any Unicode code point other than ``'{'`` or
+``'}'``. The presence of a fill character is signaled by the character following
+it, which must be one of the alignment options. If the second character of
+*format_spec* is not a valid alignment option, then it is assumed that both the
+fill character and the alignment option are absent.
+
+The meaning of the various alignment options is as follows:
+
++---------+----------------------------------------------------------+
+| Option  | Meaning                                                  |
++=========+==========================================================+
+| ``'<'`` | Forces the field to be left-aligned within the available |
+|         | space (this is the default for most objects).            |
++---------+----------------------------------------------------------+
+| ``'>'`` | Forces the field to be right-aligned within the          |
+|         | available space (this is the default for numbers).       |
++---------+----------------------------------------------------------+
+| ``'^'`` | Forces the field to be centered within the available     |
+|         | space.                                                   |
++---------+----------------------------------------------------------+
+
+Note that unless a minimum field width is defined, the field width will always
+be the same size as the data to fill it, so that the alignment option has no
+meaning in this case.
+
+The *sign* option is only valid for number types, and can be one of the
+following:
+
++---------+------------------------------------------------------------+
+| Option  | Meaning                                                    |
++=========+============================================================+
+| ``'+'`` | indicates that a sign should be used for both              |
+|         | nonnegative as well as negative numbers.                   |
++---------+------------------------------------------------------------+
+| ``'-'`` | indicates that a sign should be used only for negative     |
+|         | numbers (this is the default behavior).                    |
++---------+------------------------------------------------------------+
+| space   | indicates that a leading space should be used on           |
+|         | nonnegative numbers, and a minus sign on negative numbers. |
++---------+------------------------------------------------------------+
+
+The ``'#'`` option causes the "alternate form" to be used for the
+conversion.  The alternate form is defined differently for different
+types.  This option is only valid for integer and floating-point types.
+For integers, when binary, octal, or hexadecimal output is used, this
+option adds the prefix respective ``"0b"`` (``"0B"``), ``"0"``, or
+``"0x"`` (``"0X"``) to the output value.  Whether the prefix is
+lower-case or upper-case is determined by the case of the type
+specifier, for example, the prefix ``"0x"`` is used for the type ``'x'``
+and ``"0X"`` is used for ``'X'``.  For floating-point numbers the
+alternate form causes the result of the conversion to always contain a
+decimal-point character, even if no digits follow it. Normally, a
+decimal-point character appears in the result of these conversions
+only if a digit follows it. In addition, for ``'g'`` and ``'G'``
+conversions, trailing zeros are not removed from the result.
+
+.. ifconfig:: False
+
+   The ``','`` option signals the use of a comma for a thousands separator.
+   For a locale aware separator, use the ``'L'`` integer presentation type
+   instead.
+
+*width* is a decimal integer defining the minimum field width.  If not
+specified, then the field width will be determined by the content.
+
+Preceding the *width* field by a zero (``'0'``) character enables sign-aware
+zero-padding for numeric types. It forces the padding to be placed after the
+sign or base (if any) but before the digits. This is used for printing fields in
+the form '+000000120'. This option is only valid for numeric types and it has no
+effect on formatting of infinity and NaN.
+
+The *precision* is a decimal number indicating how many digits should be
+displayed after the decimal point for a floating-point value formatted with
+``'f'`` and ``'F'``, or before and after the decimal point for a floating-point
+value formatted with ``'g'`` or ``'G'``.  For non-number types the field
+indicates the maximum field size - in other words, how many characters will be
+used from the field content. The *precision* is not allowed for integer,
+character, Boolean, and pointer values. Note that a C string must be
+null-terminated even if precision is specified.
+
+The ``'L'`` option uses the current locale setting to insert the appropriate
+number separator characters. This option is only valid for numeric types.
+
+Finally, the *type* determines how the data should be presented.
+
+The available string presentation types are:
+
++---------+----------------------------------------------------------+
+| Type    | Meaning                                                  |
++=========+==========================================================+
+| ``'s'`` | String format. This is the default type for strings and  |
+|         | may be omitted.                                          |
++---------+----------------------------------------------------------+
+| none    | The same as ``'s'``.                                     |
++---------+----------------------------------------------------------+
+
+The available character presentation types are:
+
++---------+----------------------------------------------------------+
+| Type    | Meaning                                                  |
++=========+==========================================================+
+| ``'c'`` | Character format. This is the default type for           |
+|         | characters and may be omitted.                           |
++---------+----------------------------------------------------------+
+| none    | The same as ``'c'``.                                     |
++---------+----------------------------------------------------------+
+
+The available integer presentation types are:
+
++---------+----------------------------------------------------------+
+| Type    | Meaning                                                  |
++=========+==========================================================+
+| ``'b'`` | Binary format. Outputs the number in base 2. Using the   |
+|         | ``'#'`` option with this type adds the prefix ``"0b"``   |
+|         | to the output value.                                     |
++---------+----------------------------------------------------------+
+| ``'B'`` | Binary format. Outputs the number in base 2. Using the   |
+|         | ``'#'`` option with this type adds the prefix ``"0B"``   |
+|         | to the output value.                                     |
++---------+----------------------------------------------------------+
+| ``'c'`` | Character format. Outputs the number as a character.     |
++---------+----------------------------------------------------------+
+| ``'d'`` | Decimal integer. Outputs the number in base 10.          |
++---------+----------------------------------------------------------+
+| ``'o'`` | Octal format. Outputs the number in base 8.              |
++---------+----------------------------------------------------------+
+| ``'x'`` | Hex format. Outputs the number in base 16, using         |
+|         | lower-case letters for the digits above 9. Using the     |
+|         | ``'#'`` option with this type adds the prefix ``"0x"``   |
+|         | to the output value.                                     |
++---------+----------------------------------------------------------+
+| ``'X'`` | Hex format. Outputs the number in base 16, using         |
+|         | upper-case letters for the digits above 9. Using the     |
+|         | ``'#'`` option with this type adds the prefix ``"0X"``   |
+|         | to the output value.                                     |
++---------+----------------------------------------------------------+
+| none    | The same as ``'d'``.                                     |
++---------+----------------------------------------------------------+
+
+Integer presentation types can also be used with character and Boolean values.
+Boolean values are formatted using textual representation, either ``true`` or
+``false``, if the presentation type is not specified.
+
+The available presentation types for floating-point values are:
+
++---------+----------------------------------------------------------+
+| Type    | Meaning                                                  |
++=========+==========================================================+
+| ``'a'`` | Hexadecimal floating point format. Prints the number in  |
+|         | base 16 with prefix ``"0x"`` and lower-case letters for  |
+|         | digits above 9. Uses ``'p'`` to indicate the exponent.   |
++---------+----------------------------------------------------------+
+| ``'A'`` | Same as ``'a'`` except it uses upper-case letters for    |
+|         | the prefix, digits above 9 and to indicate the exponent. |
++---------+----------------------------------------------------------+
+| ``'e'`` | Exponent notation. Prints the number in scientific       |
+|         | notation using the letter 'e' to indicate the exponent.  |
++---------+----------------------------------------------------------+
+| ``'E'`` | Exponent notation. Same as ``'e'`` except it uses an     |
+|         | upper-case ``'E'`` as the separator character.           |
++---------+----------------------------------------------------------+
+| ``'f'`` | Fixed point. Displays the number as a fixed-point        |
+|         | number.                                                  |
++---------+----------------------------------------------------------+
+| ``'F'`` | Fixed point. Same as ``'f'``, but converts ``nan`` to    |
+|         | ``NAN`` and ``inf`` to ``INF``.                          |
++---------+----------------------------------------------------------+
+| ``'g'`` | General format.  For a given precision ``p >= 1``,       |
+|         | this rounds the number to ``p`` significant digits and   |
+|         | then formats the result in either fixed-point format     |
+|         | or in scientific notation, depending on its magnitude.   |
+|         |                                                          |
+|         | A precision of ``0`` is treated as equivalent to a       |
+|         | precision of ``1``.                                      |
++---------+----------------------------------------------------------+
+| ``'G'`` | General format. Same as ``'g'`` except switches to       |
+|         | ``'E'`` if the number gets too large. The                |
+|         | representations of infinity and NaN are uppercased, too. |
++---------+----------------------------------------------------------+
+| none    | Similar to ``'g'``, except that the default precision is |
+|         | as high as needed to represent the particular value.     |
++---------+----------------------------------------------------------+
+
+.. ifconfig:: False
+
+   +---------+----------------------------------------------------------+
+   |         | The precise rules are as follows: suppose that the       |
+   |         | result formatted with presentation type ``'e'`` and      |
+   |         | precision ``p-1`` would have exponent ``exp``.  Then     |
+   |         | if ``-4 <= exp < p``, the number is formatted            |
+   |         | with presentation type ``'f'`` and precision             |
+   |         | ``p-1-exp``.  Otherwise, the number is formatted         |
+   |         | with presentation type ``'e'`` and precision ``p-1``.    |
+   |         | In both cases insignificant trailing zeros are removed   |
+   |         | from the significand, and the decimal point is also      |
+   |         | removed if there are no remaining digits following it.   |
+   |         |                                                          |
+   |         | Positive and negative infinity, positive and negative    |
+   |         | zero, and nans, are formatted as ``inf``, ``-inf``,      |
+   |         | ``0``, ``-0`` and ``nan`` respectively, regardless of    |
+   |         | the precision.                                           |
+   |         |                                                          |
+   +---------+----------------------------------------------------------+
+
+The available presentation types for pointers are:
+
++---------+----------------------------------------------------------+
+| Type    | Meaning                                                  |
++=========+==========================================================+
+| ``'p'`` | Pointer format. This is the default type for             |
+|         | pointers and may be omitted.                             |
++---------+----------------------------------------------------------+
+| none    | The same as ``'p'``.                                     |
++---------+----------------------------------------------------------+
+
+.. _chrono-specs:
+
+Chrono Format Specifications
+============================
+
+Format specifications for chrono types have the following syntax:
+
+.. productionlist:: sf
+   chrono_format_spec: [[`fill`]`align`][`width`]["." `precision`][`chrono_specs`]
+   chrono_specs: [`chrono_specs`] `conversion_spec` | `chrono_specs` `literal_char`
+   conversion_spec: "%" [`modifier`] `chrono_type`
+   literal_char: <a character other than '{', '}' or '%'>
+   modifier: "E" | "O"
+   chrono_type: "a" | "A" | "b" | "B" | "c" | "C" | "d" | "D" | "e" | "F" |
+              : "g" | "G" | "h" | "H" | "I" | "j" | "m" | "M" | "n" | "p" |
+              : "q" | "Q" | "r" | "R" | "S" | "t" | "T" | "u" | "U" | "V" |
+              : "w" | "W" | "x" | "X" | "y" | "Y" | "z" | "Z" | "%"
+
+Literal chars are copied unchanged to the output. Precision is valid only for
+``std::chrono::duration`` types with a floating-point representation type.
+
+The available presentation types (*chrono_type*) for chrono durations and time
+points are:
+
++---------+--------------------------------------------------------------------+
+| Type    | Meaning                                                            |
++=========+====================================================================+
+| ``'H'`` | The hour (24-hour clock) as a decimal number. If the result is a   |
+|         | single digit, it is prefixed with 0. The modified command ``%OH``  |
+|         | produces the locale's alternative representation.                  |
++---------+--------------------------------------------------------------------+
+| ``'M'`` | The minute as a decimal number. If the result is a single digit,   |
+|         | it is prefixed with 0. The modified command ``%OM`` produces the   |
+|         | locale's alternative representation.                               |
++---------+--------------------------------------------------------------------+
+| ``'S'`` | Seconds as a decimal number. If the number of seconds is less than |
+|         | 10, the result is prefixed with 0. If the precision of the input   |
+|         | cannot be exactly represented with seconds, then the format is a   |
+|         | decimal floating-point number with a fixed format and a precision  |
+|         | matching that of the precision of the input (or to a microseconds  |
+|         | precision if the conversion to floating-point decimal seconds      |
+|         | cannot be made within 18 fractional digits). The character for the |
+|         | decimal point is localized according to the locale. The modified   |
+|         | command ``%OS`` produces the locale's alternative representation.  |
++---------+--------------------------------------------------------------------+
+
+Specifiers that have a calendaric component such as `'d'` (the day of month)
+are valid only for ``std::tm`` and not durations or time points.
+
+``std::tm`` uses the system's `strftime
+<https://en.cppreference.com/w/cpp/chrono/c/strftime>`_ so refer to its
+documentation for details on supported conversion specifiers. 
+
+.. _formatexamples:
+
+Format Examples
+===============
+
+This section contains examples of the format syntax and comparison with
+the printf formatting.
+
+In most of the cases the syntax is similar to the printf formatting, with the
+addition of the ``{}`` and with ``:`` used instead of ``%``.
+For example, ``"%03.2f"`` can be translated to ``"{:03.2f}"``.
+
+The new format syntax also supports new and different options, shown in the
+following examples.
+
+Accessing arguments by position::
+
+   fmt::format("{0}, {1}, {2}", 'a', 'b', 'c');
+   // Result: "a, b, c"
+   fmt::format("{}, {}, {}", 'a', 'b', 'c');
+   // Result: "a, b, c"
+   fmt::format("{2}, {1}, {0}", 'a', 'b', 'c');
+   // Result: "c, b, a"
+   fmt::format("{0}{1}{0}", "abra", "cad");  // arguments' indices can be repeated
+   // Result: "abracadabra"
+
+Aligning the text and specifying a width::
+
+   fmt::format("{:<30}", "left aligned");
+   // Result: "left aligned                  "
+   fmt::format("{:>30}", "right aligned");
+   // Result: "                 right aligned"
+   fmt::format("{:^30}", "centered");
+   // Result: "           centered           "
+   fmt::format("{:*^30}", "centered");  // use '*' as a fill char
+   // Result: "***********centered***********"
+
+Dynamic width::
+
+   fmt::format("{:<{}}", "left aligned", 30);
+   // Result: "left aligned                  "
+
+Dynamic precision::
+
+   fmt::format("{:.{}f}", 3.14, 1);
+   // Result: "3.1"
+
+Replacing ``%+f``, ``%-f``, and ``% f`` and specifying a sign::
+
+   fmt::format("{:+f}; {:+f}", 3.14, -3.14);  // show it always
+   // Result: "+3.140000; -3.140000"
+   fmt::format("{: f}; {: f}", 3.14, -3.14);  // show a space for positive numbers
+   // Result: " 3.140000; -3.140000"
+   fmt::format("{:-f}; {:-f}", 3.14, -3.14);  // show only the minus -- same as '{:f}; {:f}'
+   // Result: "3.140000; -3.140000"
+
+Replacing ``%x`` and ``%o`` and converting the value to different bases::
+
+   fmt::format("int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
+   // Result: "int: 42;  hex: 2a;  oct: 52; bin: 101010"
+   // with 0x or 0 or 0b as prefix:
+   fmt::format("int: {0:d};  hex: {0:#x};  oct: {0:#o};  bin: {0:#b}", 42);
+   // Result: "int: 42;  hex: 0x2a;  oct: 052;  bin: 0b101010"
+
+Padded hex byte with prefix and always prints both hex characters::
+
+   fmt::format("{:#04x}", 0);
+   // Result: "0x00"
+
+Box drawing using Unicode fill::
+
+   fmt::print(
+     "┌{0:─^{2}}┐\n"
+     "│{1: ^{2}}│\n"
+     "└{0:─^{2}}┘\n", "", "Hello, world!", 20);
+
+prints::
+
+   ┌────────────────────┐
+   │   Hello, world!    │
+   └────────────────────┘
+
+Using type-specific formatting::
+
+   #include <fmt/chrono.h>
+
+   auto t = tm();
+   t.tm_year = 2010 - 1900;
+   t.tm_mon = 7;
+   t.tm_mday = 4;
+   t.tm_hour = 12;
+   t.tm_min = 15;
+   t.tm_sec = 58;
+   fmt::print("{:%Y-%m-%d %H:%M:%S}", t);
+   // Prints: 2010-08-04 12:15:58
+
+Using the comma as a thousands separator::
+
+   #include <fmt/format.h>
+
+   auto s = fmt::format(std::locale("en_US.UTF-8"), "{:L}", 1234567890);
+   // s == "1,234,567,890"
+
+.. ifconfig:: False
+
+   Nesting arguments and more complex examples::
+
+      >>> for align, text in zip('<^>', ['left', 'center', 'right']):
+      ...     '{0:{fill}{align}16}") << text, fill=align, align=align)
+      ...
+      'left<<<<<<<<<<<<'
+      '^^^^^center^^^^^'
+      '>>>>>>>>>>>right'
+      >>>
+      >>> octets = [192, 168, 0, 1]
+      Format("{:02X}{:02X}{:02X}{:02X}") << *octets)
+      'C0A80001'
+      >>> int(_, 16)
+      3232235521
+      >>>
+      >>> width = 5
+      >>> for num in range(5,12):
+      ...     for base in 'dXob':
+      ...         print('{0:{width}{base}}") << num, base=base, width=width), end=' ')
+      ...     print()
+      ...
+          5     5     5   101
+          6     6     6   110
+          7     7     7   111
+          8     8    10  1000
+          9     9    11  1001
+         10     A    12  1010
+         11     B    13  1011
diff --git a/3rdparty/fmt/doc/usage.rst b/3rdparty/fmt/doc/usage.rst
new file mode 100644
index 00000000..f9f81858
--- /dev/null
+++ b/3rdparty/fmt/doc/usage.rst
@@ -0,0 +1,212 @@
+*****
+Usage
+*****
+
+To use the {fmt} library, add :file:`fmt/core.h`, :file:`fmt/format.h`,
+:file:`fmt/format-inl.h`, :file:`src/format.cc` and optionally other headers
+from a `release archive <https://github.com/fmtlib/fmt/releases/latest>`_ or
+the `Git repository <https://github.com/fmtlib/fmt>`_ to your project.
+Alternatively, you can :ref:`build the library with CMake <building>`.
+
+.. _building:
+
+Building the Library
+====================
+
+The included `CMake build script`__ can be used to build the fmt
+library on a wide range of platforms. CMake is freely available for
+download from https://www.cmake.org/download/.
+
+__ https://github.com/fmtlib/fmt/blob/master/CMakeLists.txt
+
+CMake works by generating native makefiles or project files that can
+be used in the compiler environment of your choice. The typical
+workflow starts with::
+
+  mkdir build          # Create a directory to hold the build output.
+  cd build
+  cmake ..  # Generate native build scripts.
+
+where :file:`{<path/to/fmt>}` is a path to the ``fmt`` repository.
+
+If you are on a \*nix system, you should now see a Makefile in the
+current directory. Now you can build the library by running :command:`make`.
+
+Once the library has been built you can invoke :command:`make test` to run
+the tests.
+
+You can control generation of the make ``test`` target with the ``FMT_TEST``
+CMake option. This can be useful if you include fmt as a subdirectory in
+your project but don't want to add fmt's tests to your ``test`` target.
+
+If you use Windows and have Visual Studio installed, a :file:`FMT.sln`
+file and several :file:`.vcproj` files will be created. You can then build them
+using Visual Studio or msbuild.
+
+On Mac OS X with Xcode installed, an :file:`.xcodeproj` file will be generated.
+
+To build a `shared library`__ set the ``BUILD_SHARED_LIBS`` CMake variable to
+``TRUE``::
+
+  cmake -DBUILD_SHARED_LIBS=TRUE ...
+
+__ https://en.wikipedia.org/wiki/Library_%28computing%29#Shared_libraries
+
+
+To build a `static library` with position independent code (required if the main
+consumer of the fmt library is a shared library i.e. a Python extension) set the
+``CMAKE_POSITION_INDEPENDENT_CODE`` CMake variable to ``TRUE``::
+
+  cmake -DCMAKE_POSITION_INDEPENDENT_CODE=TRUE ...
+
+
+Installing the Library
+======================
+
+After building the library you can install it on a Unix-like system by running
+:command:`sudo make install`.
+
+Usage with CMake
+================
+
+You can add the ``fmt`` library directory into your project and include it in
+your ``CMakeLists.txt`` file::
+
+   add_subdirectory(fmt)
+
+or
+
+::
+
+   add_subdirectory(fmt EXCLUDE_FROM_ALL)
+
+to exclude it from ``make``, ``make all``, or ``cmake --build .``.
+
+You can detect and use an installed version of {fmt} as follows::
+
+   find_package(fmt)
+   target_link_libraries(<your-target> fmt::fmt)
+
+Setting up your target to use a header-only version of ``fmt`` is equally easy::
+
+   target_link_libraries(<your-target> PRIVATE fmt::fmt-header-only)
+
+Usage with build2
+=================
+
+You can use `build2 <https://build2.org>`_, a dependency manager and a
+build-system combined, to use ``fmt``.
+
+Currently this package is available in these package repositories:
+
+- **https://cppget.org/fmt/** for released and published versions.
+- `The git repository with the sources of the build2 package of fmt <https://github.com/build2-packaging/fmt.git>`_
+  for unreleased or custom revisions of ``fmt``.
+
+**Usage:**
+
+- ``build2`` package name: ``fmt``
+- Library target name : ``lib{fmt}``
+
+For example, to make your ``build2`` project depend on ``fmt``:
+
+- Add one of the repositories to your configurations, or in your
+  ``repositories.manifest``, if not already there::
+
+    :
+    role: prerequisite
+    location: https://pkg.cppget.org/1/stable
+
+- Add this package as a dependency to your ``./manifest`` file
+  (example for ``v7.0.x``)::
+
+    depends: fmt ~7.0.0
+
+- Import the target and use it as a prerequisite to your own target
+  using `fmt` in the appropriate ``buildfile``::
+
+    import fmt = fmt%lib{fmt}
+    lib{mylib} : cxx{**} ... $fmt
+
+Then build your project as usual with `b` or `bdep update`.
+
+For ``build2`` newcomers or to get more details and use cases, you can read the
+``build2``
+`toolchain introduction <https://build2.org/build2-toolchain/doc/build2-toolchain-intro.xhtml>`_.
+
+Building the Documentation
+==========================
+
+To build the documentation you need the following software installed on your
+system:
+
+* `Python <https://www.python.org/>`_ with pip and virtualenv
+* `Doxygen <http://www.stack.nl/~dimitri/doxygen/>`_
+* `Less <http://lesscss.org/>`_ with ``less-plugin-clean-css``.
+  Ubuntu doesn't package the ``clean-css`` plugin so you should use ``npm``
+  instead of ``apt`` to install both ``less`` and the plugin::
+
+    sudo npm install -g less less-plugin-clean-css.
+
+First generate makefiles or project files using CMake as described in
+the previous section. Then compile the ``doc`` target/project, for example::
+
+  make doc
+
+This will generate the HTML documentation in ``doc/html``.
+
+Conda
+=====
+
+fmt can be installed on Linux, macOS and Windows with
+`Conda <https://docs.conda.io/en/latest/>`__, using its
+`conda-forge <https://conda-forge.org>`__
+`package <https://github.com/conda-forge/fmt-feedstock>`__, as follows::
+
+  conda install -c conda-forge fmt
+
+Vcpkg
+=====
+
+You can download and install fmt using the `vcpkg
+<https://github.com/Microsoft/vcpkg>`__ dependency manager::
+
+  git clone https://github.com/Microsoft/vcpkg.git
+  cd vcpkg
+  ./bootstrap-vcpkg.sh
+  ./vcpkg integrate install
+  ./vcpkg install fmt
+
+The fmt port in vcpkg is kept up to date by Microsoft team members and community
+contributors. If the version is out of date, please `create an issue or pull
+request <https://github.com/Microsoft/vcpkg>`__ on the vcpkg repository.
+
+LHelper
+=======
+
+You can download and install fmt using
+`lhelper <https://github.com/franko/lhelper>`__ dependency manager::
+
+  lhelper activate <some-environment>
+  lhelper install fmt
+
+All the recipes for lhelper are kept in the
+`lhelper's recipe <https://github.com/franko/lhelper-recipes>`__ repository.
+
+Android NDK
+===========
+
+fmt provides `Android.mk file`__ that can be used to build the library
+with `Android NDK <https://developer.android.com/tools/sdk/ndk/index.html>`_.
+For an example of using fmt with Android NDK, see the
+`android-ndk-example <https://github.com/fmtlib/android-ndk-example>`_
+repository.
+
+__ https://github.com/fmtlib/fmt/blob/master/support/Android.mk
+
+Homebrew
+========
+
+fmt can be installed on OS X using `Homebrew <https://brew.sh/>`_::
+
+  brew install fmt
diff --git a/3rdparty/fmt/include/fmt/args.h b/3rdparty/fmt/include/fmt/args.h
new file mode 100644
index 00000000..9a8e4ed2
--- /dev/null
+++ b/3rdparty/fmt/include/fmt/args.h
@@ -0,0 +1,234 @@
+// Formatting library for C++ - dynamic format arguments
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_ARGS_H_
+#define FMT_ARGS_H_
+
+#include <functional>  // std::reference_wrapper
+#include <memory>      // std::unique_ptr
+#include <vector>
+
+#include "core.h"
+
+FMT_BEGIN_NAMESPACE
+
+namespace detail {
+
+template <typename T> struct is_reference_wrapper : std::false_type {};
+template <typename T>
+struct is_reference_wrapper<std::reference_wrapper<T>> : std::true_type {};
+
+template <typename T> const T& unwrap(const T& v) { return v; }
+template <typename T> const T& unwrap(const std::reference_wrapper<T>& v) {
+  return static_cast<const T&>(v);
+}
+
+class dynamic_arg_list {
+  // Workaround for clang's -Wweak-vtables. Unlike for regular classes, for
+  // templates it doesn't complain about inability to deduce single translation
+  // unit for placing vtable. So storage_node_base is made a fake template.
+  template <typename = void> struct node {
+    virtual ~node() = default;
+    std::unique_ptr<node<>> next;
+  };
+
+  template <typename T> struct typed_node : node<> {
+    T value;
+
+    template <typename Arg>
+    FMT_CONSTEXPR typed_node(const Arg& arg) : value(arg) {}
+
+    template <typename Char>
+    FMT_CONSTEXPR typed_node(const basic_string_view<Char>& arg)
+        : value(arg.data(), arg.size()) {}
+  };
+
+  std::unique_ptr<node<>> head_;
+
+ public:
+  template <typename T, typename Arg> const T& push(const Arg& arg) {
+    auto new_node = std::unique_ptr<typed_node<T>>(new typed_node<T>(arg));
+    auto& value = new_node->value;
+    new_node->next = std::move(head_);
+    head_ = std::move(new_node);
+    return value;
+  }
+};
+}  // namespace detail
+
+/**
+  \rst
+  A dynamic version of `fmt::format_arg_store`.
+  It's equipped with a storage to potentially temporary objects which lifetimes
+  could be shorter than the format arguments object.
+
+  It can be implicitly converted into `~fmt::basic_format_args` for passing
+  into type-erased formatting functions such as `~fmt::vformat`.
+  \endrst
+ */
+template <typename Context>
+class dynamic_format_arg_store
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+    // Workaround a GCC template argument substitution bug.
+    : public basic_format_args<Context>
+#endif
+{
+ private:
+  using char_type = typename Context::char_type;
+
+  template <typename T> struct need_copy {
+    static constexpr detail::type mapped_type =
+        detail::mapped_type_constant<T, Context>::value;
+
+    enum {
+      value = !(detail::is_reference_wrapper<T>::value ||
+                std::is_same<T, basic_string_view<char_type>>::value ||
+                std::is_same<T, detail::std_string_view<char_type>>::value ||
+                (mapped_type != detail::type::cstring_type &&
+                 mapped_type != detail::type::string_type &&
+                 mapped_type != detail::type::custom_type))
+    };
+  };
+
+  template <typename T>
+  using stored_type = conditional_t<detail::is_string<T>::value &&
+                                        !has_formatter<T, Context>::value &&
+                                        !detail::is_reference_wrapper<T>::value,
+                                    std::basic_string<char_type>, T>;
+
+  // Storage of basic_format_arg must be contiguous.
+  std::vector<basic_format_arg<Context>> data_;
+  std::vector<detail::named_arg_info<char_type>> named_info_;
+
+  // Storage of arguments not fitting into basic_format_arg must grow
+  // without relocation because items in data_ refer to it.
+  detail::dynamic_arg_list dynamic_args_;
+
+  friend class basic_format_args<Context>;
+
+  unsigned long long get_types() const {
+    return detail::is_unpacked_bit | data_.size() |
+           (named_info_.empty()
+                ? 0ULL
+                : static_cast<unsigned long long>(detail::has_named_args_bit));
+  }
+
+  const basic_format_arg<Context>* data() const {
+    return named_info_.empty() ? data_.data() : data_.data() + 1;
+  }
+
+  template <typename T> void emplace_arg(const T& arg) {
+    data_.emplace_back(detail::make_arg<Context>(arg));
+  }
+
+  template <typename T>
+  void emplace_arg(const detail::named_arg<char_type, T>& arg) {
+    if (named_info_.empty()) {
+      constexpr const detail::named_arg_info<char_type>* zero_ptr{nullptr};
+      data_.insert(data_.begin(), {zero_ptr, 0});
+    }
+    data_.emplace_back(detail::make_arg<Context>(detail::unwrap(arg.value)));
+    auto pop_one = [](std::vector<basic_format_arg<Context>>* data) {
+      data->pop_back();
+    };
+    std::unique_ptr<std::vector<basic_format_arg<Context>>, decltype(pop_one)>
+        guard{&data_, pop_one};
+    named_info_.push_back({arg.name, static_cast<int>(data_.size() - 2u)});
+    data_[0].value_.named_args = {named_info_.data(), named_info_.size()};
+    guard.release();
+  }
+
+ public:
+  constexpr dynamic_format_arg_store() = default;
+
+  /**
+    \rst
+    Adds an argument into the dynamic store for later passing to a formatting
+    function.
+
+    Note that custom types and string types (but not string views) are copied
+    into the store dynamically allocating memory if necessary.
+
+    **Example**::
+
+      fmt::dynamic_format_arg_store<fmt::format_context> store;
+      store.push_back(42);
+      store.push_back("abc");
+      store.push_back(1.5f);
+      std::string result = fmt::vformat("{} and {} and {}", store);
+    \endrst
+  */
+  template <typename T> void push_back(const T& arg) {
+    if (detail::const_check(need_copy<T>::value))
+      emplace_arg(dynamic_args_.push<stored_type<T>>(arg));
+    else
+      emplace_arg(detail::unwrap(arg));
+  }
+
+  /**
+    \rst
+    Adds a reference to the argument into the dynamic store for later passing to
+    a formatting function.
+
+    **Example**::
+
+      fmt::dynamic_format_arg_store<fmt::format_context> store;
+      char band[] = "Rolling Stones";
+      store.push_back(std::cref(band));
+      band[9] = 'c'; // Changing str affects the output.
+      std::string result = fmt::vformat("{}", store);
+      // result == "Rolling Scones"
+    \endrst
+  */
+  template <typename T> void push_back(std::reference_wrapper<T> arg) {
+    static_assert(
+        need_copy<T>::value,
+        "objects of built-in types and string views are always copied");
+    emplace_arg(arg.get());
+  }
+
+  /**
+    Adds named argument into the dynamic store for later passing to a formatting
+    function. ``std::reference_wrapper`` is supported to avoid copying of the
+    argument. The name is always copied into the store.
+  */
+  template <typename T>
+  void push_back(const detail::named_arg<char_type, T>& arg) {
+    const char_type* arg_name =
+        dynamic_args_.push<std::basic_string<char_type>>(arg.name).c_str();
+    if (detail::const_check(need_copy<T>::value)) {
+      emplace_arg(
+          fmt::arg(arg_name, dynamic_args_.push<stored_type<T>>(arg.value)));
+    } else {
+      emplace_arg(fmt::arg(arg_name, arg.value));
+    }
+  }
+
+  /** Erase all elements from the store */
+  void clear() {
+    data_.clear();
+    named_info_.clear();
+    dynamic_args_ = detail::dynamic_arg_list();
+  }
+
+  /**
+    \rst
+    Reserves space to store at least *new_cap* arguments including
+    *new_cap_named* named arguments.
+    \endrst
+  */
+  void reserve(size_t new_cap, size_t new_cap_named) {
+    FMT_ASSERT(new_cap >= new_cap_named,
+               "Set of arguments includes set of named arguments");
+    data_.reserve(new_cap);
+    named_info_.reserve(new_cap_named);
+  }
+};
+
+FMT_END_NAMESPACE
+
+#endif  // FMT_ARGS_H_
diff --git a/3rdparty/fmt/include/fmt/chrono.h b/3rdparty/fmt/include/fmt/chrono.h
new file mode 100644
index 00000000..682efd8d
--- /dev/null
+++ b/3rdparty/fmt/include/fmt/chrono.h
@@ -0,0 +1,2067 @@
+// Formatting library for C++ - chrono support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_CHRONO_H_
+#define FMT_CHRONO_H_
+
+#include <algorithm>
+#include <chrono>
+#include <ctime>
+#include <iterator>
+#include <locale>
+#include <ostream>
+#include <type_traits>
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+
+// Enable tzset.
+#ifndef FMT_USE_TZSET
+// UWP doesn't provide _tzset.
+#  if FMT_HAS_INCLUDE("winapifamily.h")
+#    include <winapifamily.h>
+#  endif
+#  if defined(_WIN32) && (!defined(WINAPI_FAMILY) || \
+                          (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
+#    define FMT_USE_TZSET 1
+#  else
+#    define FMT_USE_TZSET 0
+#  endif
+#endif
+
+// Enable safe chrono durations, unless explicitly disabled.
+#ifndef FMT_SAFE_DURATION_CAST
+#  define FMT_SAFE_DURATION_CAST 1
+#endif
+#if FMT_SAFE_DURATION_CAST
+
+// For conversion between std::chrono::durations without undefined
+// behaviour or erroneous results.
+// This is a stripped down version of duration_cast, for inclusion in fmt.
+// See https://github.com/pauldreik/safe_duration_cast
+//
+// Copyright Paul Dreik 2019
+namespace safe_duration_cast {
+
+template <typename To, typename From,
+          FMT_ENABLE_IF(!std::is_same<From, To>::value &&
+                        std::numeric_limits<From>::is_signed ==
+                            std::numeric_limits<To>::is_signed)>
+FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
+  ec = 0;
+  using F = std::numeric_limits<From>;
+  using T = std::numeric_limits<To>;
+  static_assert(F::is_integer, "From must be integral");
+  static_assert(T::is_integer, "To must be integral");
+
+  // A and B are both signed, or both unsigned.
+  if (detail::const_check(F::digits <= T::digits)) {
+    // From fits in To without any problem.
+  } else {
+    // From does not always fit in To, resort to a dynamic check.
+    if (from < (T::min)() || from > (T::max)()) {
+      // outside range.
+      ec = 1;
+      return {};
+    }
+  }
+  return static_cast<To>(from);
+}
+
+/**
+ * converts From to To, without loss. If the dynamic value of from
+ * can't be converted to To without loss, ec is set.
+ */
+template <typename To, typename From,
+          FMT_ENABLE_IF(!std::is_same<From, To>::value &&
+                        std::numeric_limits<From>::is_signed !=
+                            std::numeric_limits<To>::is_signed)>
+FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
+  ec = 0;
+  using F = std::numeric_limits<From>;
+  using T = std::numeric_limits<To>;
+  static_assert(F::is_integer, "From must be integral");
+  static_assert(T::is_integer, "To must be integral");
+
+  if (detail::const_check(F::is_signed && !T::is_signed)) {
+    // From may be negative, not allowed!
+    if (fmt::detail::is_negative(from)) {
+      ec = 1;
+      return {};
+    }
+    // From is positive. Can it always fit in To?
+    if (detail::const_check(F::digits > T::digits) &&
+        from > static_cast<From>(detail::max_value<To>())) {
+      ec = 1;
+      return {};
+    }
+  }
+
+  if (detail::const_check(!F::is_signed && T::is_signed &&
+                          F::digits >= T::digits) &&
+      from > static_cast<From>(detail::max_value<To>())) {
+    ec = 1;
+    return {};
+  }
+  return static_cast<To>(from);  // Lossless conversion.
+}
+
+template <typename To, typename From,
+          FMT_ENABLE_IF(std::is_same<From, To>::value)>
+FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
+  ec = 0;
+  return from;
+}  // function
+
+// clang-format off
+/**
+ * converts From to To if possible, otherwise ec is set.
+ *
+ * input                            |    output
+ * ---------------------------------|---------------
+ * NaN                              | NaN
+ * Inf                              | Inf
+ * normal, fits in output           | converted (possibly lossy)
+ * normal, does not fit in output   | ec is set
+ * subnormal                        | best effort
+ * -Inf                             | -Inf
+ */
+// clang-format on
+template <typename To, typename From,
+          FMT_ENABLE_IF(!std::is_same<From, To>::value)>
+FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) {
+  ec = 0;
+  using T = std::numeric_limits<To>;
+  static_assert(std::is_floating_point<From>::value, "From must be floating");
+  static_assert(std::is_floating_point<To>::value, "To must be floating");
+
+  // catch the only happy case
+  if (std::isfinite(from)) {
+    if (from >= T::lowest() && from <= (T::max)()) {
+      return static_cast<To>(from);
+    }
+    // not within range.
+    ec = 1;
+    return {};
+  }
+
+  // nan and inf will be preserved
+  return static_cast<To>(from);
+}  // function
+
+template <typename To, typename From,
+          FMT_ENABLE_IF(std::is_same<From, To>::value)>
+FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) {
+  ec = 0;
+  static_assert(std::is_floating_point<From>::value, "From must be floating");
+  return from;
+}
+
+/**
+ * safe duration cast between integral durations
+ */
+template <typename To, typename FromRep, typename FromPeriod,
+          FMT_ENABLE_IF(std::is_integral<FromRep>::value),
+          FMT_ENABLE_IF(std::is_integral<typename To::rep>::value)>
+To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
+                      int& ec) {
+  using From = std::chrono::duration<FromRep, FromPeriod>;
+  ec = 0;
+  // the basic idea is that we need to convert from count() in the from type
+  // to count() in the To type, by multiplying it with this:
+  struct Factor
+      : std::ratio_divide<typename From::period, typename To::period> {};
+
+  static_assert(Factor::num > 0, "num must be positive");
+  static_assert(Factor::den > 0, "den must be positive");
+
+  // the conversion is like this: multiply from.count() with Factor::num
+  // /Factor::den and convert it to To::rep, all this without
+  // overflow/underflow. let's start by finding a suitable type that can hold
+  // both To, From and Factor::num
+  using IntermediateRep =
+      typename std::common_type<typename From::rep, typename To::rep,
+                                decltype(Factor::num)>::type;
+
+  // safe conversion to IntermediateRep
+  IntermediateRep count =
+      lossless_integral_conversion<IntermediateRep>(from.count(), ec);
+  if (ec) return {};
+  // multiply with Factor::num without overflow or underflow
+  if (detail::const_check(Factor::num != 1)) {
+    const auto max1 = detail::max_value<IntermediateRep>() / Factor::num;
+    if (count > max1) {
+      ec = 1;
+      return {};
+    }
+    const auto min1 =
+        (std::numeric_limits<IntermediateRep>::min)() / Factor::num;
+    if (count < min1) {
+      ec = 1;
+      return {};
+    }
+    count *= Factor::num;
+  }
+
+  if (detail::const_check(Factor::den != 1)) count /= Factor::den;
+  auto tocount = lossless_integral_conversion<typename To::rep>(count, ec);
+  return ec ? To() : To(tocount);
+}
+
+/**
+ * safe duration_cast between floating point durations
+ */
+template <typename To, typename FromRep, typename FromPeriod,
+          FMT_ENABLE_IF(std::is_floating_point<FromRep>::value),
+          FMT_ENABLE_IF(std::is_floating_point<typename To::rep>::value)>
+To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
+                      int& ec) {
+  using From = std::chrono::duration<FromRep, FromPeriod>;
+  ec = 0;
+  if (std::isnan(from.count())) {
+    // nan in, gives nan out. easy.
+    return To{std::numeric_limits<typename To::rep>::quiet_NaN()};
+  }
+  // maybe we should also check if from is denormal, and decide what to do about
+  // it.
+
+  // +-inf should be preserved.
+  if (std::isinf(from.count())) {
+    return To{from.count()};
+  }
+
+  // the basic idea is that we need to convert from count() in the from type
+  // to count() in the To type, by multiplying it with this:
+  struct Factor
+      : std::ratio_divide<typename From::period, typename To::period> {};
+
+  static_assert(Factor::num > 0, "num must be positive");
+  static_assert(Factor::den > 0, "den must be positive");
+
+  // the conversion is like this: multiply from.count() with Factor::num
+  // /Factor::den and convert it to To::rep, all this without
+  // overflow/underflow. let's start by finding a suitable type that can hold
+  // both To, From and Factor::num
+  using IntermediateRep =
+      typename std::common_type<typename From::rep, typename To::rep,
+                                decltype(Factor::num)>::type;
+
+  // force conversion of From::rep -> IntermediateRep to be safe,
+  // even if it will never happen be narrowing in this context.
+  IntermediateRep count =
+      safe_float_conversion<IntermediateRep>(from.count(), ec);
+  if (ec) {
+    return {};
+  }
+
+  // multiply with Factor::num without overflow or underflow
+  if (detail::const_check(Factor::num != 1)) {
+    constexpr auto max1 = detail::max_value<IntermediateRep>() /
+                          static_cast<IntermediateRep>(Factor::num);
+    if (count > max1) {
+      ec = 1;
+      return {};
+    }
+    constexpr auto min1 = std::numeric_limits<IntermediateRep>::lowest() /
+                          static_cast<IntermediateRep>(Factor::num);
+    if (count < min1) {
+      ec = 1;
+      return {};
+    }
+    count *= static_cast<IntermediateRep>(Factor::num);
+  }
+
+  // this can't go wrong, right? den>0 is checked earlier.
+  if (detail::const_check(Factor::den != 1)) {
+    using common_t = typename std::common_type<IntermediateRep, intmax_t>::type;
+    count /= static_cast<common_t>(Factor::den);
+  }
+
+  // convert to the to type, safely
+  using ToRep = typename To::rep;
+
+  const ToRep tocount = safe_float_conversion<ToRep>(count, ec);
+  if (ec) {
+    return {};
+  }
+  return To{tocount};
+}
+}  // namespace safe_duration_cast
+#endif
+
+// Prevents expansion of a preceding token as a function-style macro.
+// Usage: f FMT_NOMACRO()
+#define FMT_NOMACRO
+
+namespace detail {
+template <typename T = void> struct null {};
+inline null<> localtime_r FMT_NOMACRO(...) { return null<>(); }
+inline null<> localtime_s(...) { return null<>(); }
+inline null<> gmtime_r(...) { return null<>(); }
+inline null<> gmtime_s(...) { return null<>(); }
+
+inline const std::locale& get_classic_locale() {
+  static const auto& locale = std::locale::classic();
+  return locale;
+}
+
+template <typename CodeUnit> struct codecvt_result {
+  static constexpr const size_t max_size = 32;
+  CodeUnit buf[max_size];
+  CodeUnit* end;
+};
+template <typename CodeUnit>
+constexpr const size_t codecvt_result<CodeUnit>::max_size;
+
+template <typename CodeUnit>
+void write_codecvt(codecvt_result<CodeUnit>& out, string_view in_buf,
+                   const std::locale& loc) {
+  using codecvt = std::codecvt<CodeUnit, char, std::mbstate_t>;
+#if FMT_CLANG_VERSION
+#  pragma clang diagnostic push
+#  pragma clang diagnostic ignored "-Wdeprecated"
+  auto& f = std::use_facet<codecvt>(loc);
+#  pragma clang diagnostic pop
+#else
+  auto& f = std::use_facet<codecvt>(loc);
+#endif
+  auto mb = std::mbstate_t();
+  const char* from_next = nullptr;
+  auto result = f.in(mb, in_buf.begin(), in_buf.end(), from_next,
+                     std::begin(out.buf), std::end(out.buf), out.end);
+  if (result != std::codecvt_base::ok)
+    FMT_THROW(format_error("failed to format time"));
+}
+
+template <typename OutputIt>
+auto write_encoded_tm_str(OutputIt out, string_view in, const std::locale& loc)
+    -> OutputIt {
+  if (detail::is_utf8() && loc != get_classic_locale()) {
+    // char16_t and char32_t codecvts are broken in MSVC (linkage errors) and
+    // gcc-4.
+#if FMT_MSC_VER != 0 || \
+    (defined(__GLIBCXX__) && !defined(_GLIBCXX_USE_DUAL_ABI))
+    // The _GLIBCXX_USE_DUAL_ABI macro is always defined in libstdc++ from gcc-5
+    // and newer.
+    using code_unit = wchar_t;
+#else
+    using code_unit = char32_t;
+#endif
+
+    using unit_t = codecvt_result<code_unit>;
+    unit_t unit;
+    write_codecvt(unit, in, loc);
+    // In UTF-8 is used one to four one-byte code units.
+    auto&& buf = basic_memory_buffer<char, unit_t::max_size * 4>();
+    for (code_unit* p = unit.buf; p != unit.end; ++p) {
+      uint32_t c = static_cast<uint32_t>(*p);
+      if (sizeof(code_unit) == 2 && c >= 0xd800 && c <= 0xdfff) {
+        // surrogate pair
+        ++p;
+        if (p == unit.end || (c & 0xfc00) != 0xd800 ||
+            (*p & 0xfc00) != 0xdc00) {
+          FMT_THROW(format_error("failed to format time"));
+        }
+        c = (c << 10) + static_cast<uint32_t>(*p) - 0x35fdc00;
+      }
+      if (c < 0x80) {
+        buf.push_back(static_cast<char>(c));
+      } else if (c < 0x800) {
+        buf.push_back(static_cast<char>(0xc0 | (c >> 6)));
+        buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
+      } else if ((c >= 0x800 && c <= 0xd7ff) || (c >= 0xe000 && c <= 0xffff)) {
+        buf.push_back(static_cast<char>(0xe0 | (c >> 12)));
+        buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
+        buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
+      } else if (c >= 0x10000 && c <= 0x10ffff) {
+        buf.push_back(static_cast<char>(0xf0 | (c >> 18)));
+        buf.push_back(static_cast<char>(0x80 | ((c & 0x3ffff) >> 12)));
+        buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
+        buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
+      } else {
+        FMT_THROW(format_error("failed to format time"));
+      }
+    }
+    return copy_str<char>(buf.data(), buf.data() + buf.size(), out);
+  }
+  return copy_str<char>(in.data(), in.data() + in.size(), out);
+}
+
+template <typename Char, typename OutputIt,
+          FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+auto write_tm_str(OutputIt out, string_view sv, const std::locale& loc)
+    -> OutputIt {
+  codecvt_result<Char> unit;
+  write_codecvt(unit, sv, loc);
+  return copy_str<Char>(unit.buf, unit.end, out);
+}
+
+template <typename Char, typename OutputIt,
+          FMT_ENABLE_IF(std::is_same<Char, char>::value)>
+auto write_tm_str(OutputIt out, string_view sv, const std::locale& loc)
+    -> OutputIt {
+  return write_encoded_tm_str(out, sv, loc);
+}
+
+template <typename Char>
+inline void do_write(buffer<Char>& buf, const std::tm& time,
+                     const std::locale& loc, char format, char modifier) {
+  auto&& format_buf = formatbuf<std::basic_streambuf<Char>>(buf);
+  auto&& os = std::basic_ostream<Char>(&format_buf);
+  os.imbue(loc);
+  using iterator = std::ostreambuf_iterator<Char>;
+  const auto& facet = std::use_facet<std::time_put<Char, iterator>>(loc);
+  auto end = facet.put(os, os, Char(' '), &time, format, modifier);
+  if (end.failed()) FMT_THROW(format_error("failed to format time"));
+}
+
+template <typename Char, typename OutputIt,
+          FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+auto write(OutputIt out, const std::tm& time, const std::locale& loc,
+           char format, char modifier = 0) -> OutputIt {
+  auto&& buf = get_buffer<Char>(out);
+  do_write<Char>(buf, time, loc, format, modifier);
+  return buf.out();
+}
+
+template <typename Char, typename OutputIt,
+          FMT_ENABLE_IF(std::is_same<Char, char>::value)>
+auto write(OutputIt out, const std::tm& time, const std::locale& loc,
+           char format, char modifier = 0) -> OutputIt {
+  auto&& buf = basic_memory_buffer<Char>();
+  do_write<char>(buf, time, loc, format, modifier);
+  return write_encoded_tm_str(out, string_view(buf.data(), buf.size()), loc);
+}
+
+}  // namespace detail
+
+FMT_MODULE_EXPORT_BEGIN
+
+/**
+  Converts given time since epoch as ``std::time_t`` value into calendar time,
+  expressed in local time. Unlike ``std::localtime``, this function is
+  thread-safe on most platforms.
+ */
+inline std::tm localtime(std::time_t time) {
+  struct dispatcher {
+    std::time_t time_;
+    std::tm tm_;
+
+    dispatcher(std::time_t t) : time_(t) {}
+
+    bool run() {
+      using namespace fmt::detail;
+      return handle(localtime_r(&time_, &tm_));
+    }
+
+    bool handle(std::tm* tm) { return tm != nullptr; }
+
+    bool handle(detail::null<>) {
+      using namespace fmt::detail;
+      return fallback(localtime_s(&tm_, &time_));
+    }
+
+    bool fallback(int res) { return res == 0; }
+
+#if !FMT_MSC_VER
+    bool fallback(detail::null<>) {
+      using namespace fmt::detail;
+      std::tm* tm = std::localtime(&time_);
+      if (tm) tm_ = *tm;
+      return tm != nullptr;
+    }
+#endif
+  };
+  dispatcher lt(time);
+  // Too big time values may be unsupported.
+  if (!lt.run()) FMT_THROW(format_error("time_t value out of range"));
+  return lt.tm_;
+}
+
+inline std::tm localtime(
+    std::chrono::time_point<std::chrono::system_clock> time_point) {
+  return localtime(std::chrono::system_clock::to_time_t(time_point));
+}
+
+/**
+  Converts given time since epoch as ``std::time_t`` value into calendar time,
+  expressed in Coordinated Universal Time (UTC). Unlike ``std::gmtime``, this
+  function is thread-safe on most platforms.
+ */
+inline std::tm gmtime(std::time_t time) {
+  struct dispatcher {
+    std::time_t time_;
+    std::tm tm_;
+
+    dispatcher(std::time_t t) : time_(t) {}
+
+    bool run() {
+      using namespace fmt::detail;
+      return handle(gmtime_r(&time_, &tm_));
+    }
+
+    bool handle(std::tm* tm) { return tm != nullptr; }
+
+    bool handle(detail::null<>) {
+      using namespace fmt::detail;
+      return fallback(gmtime_s(&tm_, &time_));
+    }
+
+    bool fallback(int res) { return res == 0; }
+
+#if !FMT_MSC_VER
+    bool fallback(detail::null<>) {
+      std::tm* tm = std::gmtime(&time_);
+      if (tm) tm_ = *tm;
+      return tm != nullptr;
+    }
+#endif
+  };
+  dispatcher gt(time);
+  // Too big time values may be unsupported.
+  if (!gt.run()) FMT_THROW(format_error("time_t value out of range"));
+  return gt.tm_;
+}
+
+inline std::tm gmtime(
+    std::chrono::time_point<std::chrono::system_clock> time_point) {
+  return gmtime(std::chrono::system_clock::to_time_t(time_point));
+}
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+// Writes two-digit numbers a, b and c separated by sep to buf.
+// The method by Pavel Novikov based on
+// https://johnnylee-sde.github.io/Fast-unsigned-integer-to-time-string/.
+inline void write_digit2_separated(char* buf, unsigned a, unsigned b,
+                                   unsigned c, char sep) {
+  unsigned long long digits =
+      a | (b << 24) | (static_cast<unsigned long long>(c) << 48);
+  // Convert each value to BCD.
+  // We have x = a * 10 + b and we want to convert it to BCD y = a * 16 + b.
+  // The difference is
+  //   y - x = a * 6
+  // a can be found from x:
+  //   a = floor(x / 10)
+  // then
+  //   y = x + a * 6 = x + floor(x / 10) * 6
+  // floor(x / 10) is (x * 205) >> 11 (needs 16 bits).
+  digits += (((digits * 205) >> 11) & 0x000f00000f00000f) * 6;
+  // Put low nibbles to high bytes and high nibbles to low bytes.
+  digits = ((digits & 0x00f00000f00000f0) >> 4) |
+           ((digits & 0x000f00000f00000f) << 8);
+  auto usep = static_cast<unsigned long long>(sep);
+  // Add ASCII '0' to each digit byte and insert separators.
+  digits |= 0x3030003030003030 | (usep << 16) | (usep << 40);
+
+  constexpr const size_t len = 8;
+  if (const_check(is_big_endian())) {
+    char tmp[len];
+    memcpy(tmp, &digits, len);
+    std::reverse_copy(tmp, tmp + len, buf);
+  } else {
+    memcpy(buf, &digits, len);
+  }
+}
+
+template <typename Period> FMT_CONSTEXPR inline const char* get_units() {
+  if (std::is_same<Period, std::atto>::value) return "as";
+  if (std::is_same<Period, std::femto>::value) return "fs";
+  if (std::is_same<Period, std::pico>::value) return "ps";
+  if (std::is_same<Period, std::nano>::value) return "ns";
+  if (std::is_same<Period, std::micro>::value) return "µs";
+  if (std::is_same<Period, std::milli>::value) return "ms";
+  if (std::is_same<Period, std::centi>::value) return "cs";
+  if (std::is_same<Period, std::deci>::value) return "ds";
+  if (std::is_same<Period, std::ratio<1>>::value) return "s";
+  if (std::is_same<Period, std::deca>::value) return "das";
+  if (std::is_same<Period, std::hecto>::value) return "hs";
+  if (std::is_same<Period, std::kilo>::value) return "ks";
+  if (std::is_same<Period, std::mega>::value) return "Ms";
+  if (std::is_same<Period, std::giga>::value) return "Gs";
+  if (std::is_same<Period, std::tera>::value) return "Ts";
+  if (std::is_same<Period, std::peta>::value) return "Ps";
+  if (std::is_same<Period, std::exa>::value) return "Es";
+  if (std::is_same<Period, std::ratio<60>>::value) return "m";
+  if (std::is_same<Period, std::ratio<3600>>::value) return "h";
+  return nullptr;
+}
+
+enum class numeric_system {
+  standard,
+  // Alternative numeric system, e.g. 十二 instead of 12 in ja_JP locale.
+  alternative
+};
+
+// Parses a put_time-like format string and invokes handler actions.
+template <typename Char, typename Handler>
+FMT_CONSTEXPR const Char* parse_chrono_format(const Char* begin,
+                                              const Char* end,
+                                              Handler&& handler) {
+  auto ptr = begin;
+  while (ptr != end) {
+    auto c = *ptr;
+    if (c == '}') break;
+    if (c != '%') {
+      ++ptr;
+      continue;
+    }
+    if (begin != ptr) handler.on_text(begin, ptr);
+    ++ptr;  // consume '%'
+    if (ptr == end) FMT_THROW(format_error("invalid format"));
+    c = *ptr++;
+    switch (c) {
+    case '%':
+      handler.on_text(ptr - 1, ptr);
+      break;
+    case 'n': {
+      const Char newline[] = {'\n'};
+      handler.on_text(newline, newline + 1);
+      break;
+    }
+    case 't': {
+      const Char tab[] = {'\t'};
+      handler.on_text(tab, tab + 1);
+      break;
+    }
+    // Year:
+    case 'Y':
+      handler.on_year(numeric_system::standard);
+      break;
+    case 'y':
+      handler.on_short_year(numeric_system::standard);
+      break;
+    case 'C':
+      handler.on_century(numeric_system::standard);
+      break;
+    case 'G':
+      handler.on_iso_week_based_year();
+      break;
+    case 'g':
+      handler.on_iso_week_based_short_year();
+      break;
+    // Day of the week:
+    case 'a':
+      handler.on_abbr_weekday();
+      break;
+    case 'A':
+      handler.on_full_weekday();
+      break;
+    case 'w':
+      handler.on_dec0_weekday(numeric_system::standard);
+      break;
+    case 'u':
+      handler.on_dec1_weekday(numeric_system::standard);
+      break;
+    // Month:
+    case 'b':
+    case 'h':
+      handler.on_abbr_month();
+      break;
+    case 'B':
+      handler.on_full_month();
+      break;
+    case 'm':
+      handler.on_dec_month(numeric_system::standard);
+      break;
+    // Day of the year/month:
+    case 'U':
+      handler.on_dec0_week_of_year(numeric_system::standard);
+      break;
+    case 'W':
+      handler.on_dec1_week_of_year(numeric_system::standard);
+      break;
+    case 'V':
+      handler.on_iso_week_of_year(numeric_system::standard);
+      break;
+    case 'j':
+      handler.on_day_of_year();
+      break;
+    case 'd':
+      handler.on_day_of_month(numeric_system::standard);
+      break;
+    case 'e':
+      handler.on_day_of_month_space(numeric_system::standard);
+      break;
+    // Hour, minute, second:
+    case 'H':
+      handler.on_24_hour(numeric_system::standard);
+      break;
+    case 'I':
+      handler.on_12_hour(numeric_system::standard);
+      break;
+    case 'M':
+      handler.on_minute(numeric_system::standard);
+      break;
+    case 'S':
+      handler.on_second(numeric_system::standard);
+      break;
+    // Other:
+    case 'c':
+      handler.on_datetime(numeric_system::standard);
+      break;
+    case 'x':
+      handler.on_loc_date(numeric_system::standard);
+      break;
+    case 'X':
+      handler.on_loc_time(numeric_system::standard);
+      break;
+    case 'D':
+      handler.on_us_date();
+      break;
+    case 'F':
+      handler.on_iso_date();
+      break;
+    case 'r':
+      handler.on_12_hour_time();
+      break;
+    case 'R':
+      handler.on_24_hour_time();
+      break;
+    case 'T':
+      handler.on_iso_time();
+      break;
+    case 'p':
+      handler.on_am_pm();
+      break;
+    case 'Q':
+      handler.on_duration_value();
+      break;
+    case 'q':
+      handler.on_duration_unit();
+      break;
+    case 'z':
+      handler.on_utc_offset();
+      break;
+    case 'Z':
+      handler.on_tz_name();
+      break;
+    // Alternative representation:
+    case 'E': {
+      if (ptr == end) FMT_THROW(format_error("invalid format"));
+      c = *ptr++;
+      switch (c) {
+      case 'Y':
+        handler.on_year(numeric_system::alternative);
+        break;
+      case 'y':
+        handler.on_offset_year();
+        break;
+      case 'C':
+        handler.on_century(numeric_system::alternative);
+        break;
+      case 'c':
+        handler.on_datetime(numeric_system::alternative);
+        break;
+      case 'x':
+        handler.on_loc_date(numeric_system::alternative);
+        break;
+      case 'X':
+        handler.on_loc_time(numeric_system::alternative);
+        break;
+      default:
+        FMT_THROW(format_error("invalid format"));
+      }
+      break;
+    }
+    case 'O':
+      if (ptr == end) FMT_THROW(format_error("invalid format"));
+      c = *ptr++;
+      switch (c) {
+      case 'y':
+        handler.on_short_year(numeric_system::alternative);
+        break;
+      case 'm':
+        handler.on_dec_month(numeric_system::alternative);
+        break;
+      case 'U':
+        handler.on_dec0_week_of_year(numeric_system::alternative);
+        break;
+      case 'W':
+        handler.on_dec1_week_of_year(numeric_system::alternative);
+        break;
+      case 'V':
+        handler.on_iso_week_of_year(numeric_system::alternative);
+        break;
+      case 'd':
+        handler.on_day_of_month(numeric_system::alternative);
+        break;
+      case 'e':
+        handler.on_day_of_month_space(numeric_system::alternative);
+        break;
+      case 'w':
+        handler.on_dec0_weekday(numeric_system::alternative);
+        break;
+      case 'u':
+        handler.on_dec1_weekday(numeric_system::alternative);
+        break;
+      case 'H':
+        handler.on_24_hour(numeric_system::alternative);
+        break;
+      case 'I':
+        handler.on_12_hour(numeric_system::alternative);
+        break;
+      case 'M':
+        handler.on_minute(numeric_system::alternative);
+        break;
+      case 'S':
+        handler.on_second(numeric_system::alternative);
+        break;
+      default:
+        FMT_THROW(format_error("invalid format"));
+      }
+      break;
+    default:
+      FMT_THROW(format_error("invalid format"));
+    }
+    begin = ptr;
+  }
+  if (begin != ptr) handler.on_text(begin, ptr);
+  return ptr;
+}
+
+template <typename Derived> struct null_chrono_spec_handler {
+  FMT_CONSTEXPR void unsupported() {
+    static_cast<Derived*>(this)->unsupported();
+  }
+  FMT_CONSTEXPR void on_year(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_short_year(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_offset_year() { unsupported(); }
+  FMT_CONSTEXPR void on_century(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_iso_week_based_year() { unsupported(); }
+  FMT_CONSTEXPR void on_iso_week_based_short_year() { unsupported(); }
+  FMT_CONSTEXPR void on_abbr_weekday() { unsupported(); }
+  FMT_CONSTEXPR void on_full_weekday() { unsupported(); }
+  FMT_CONSTEXPR void on_dec0_weekday(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_dec1_weekday(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_abbr_month() { unsupported(); }
+  FMT_CONSTEXPR void on_full_month() { unsupported(); }
+  FMT_CONSTEXPR void on_dec_month(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_dec0_week_of_year(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_dec1_week_of_year(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_iso_week_of_year(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_day_of_year() { unsupported(); }
+  FMT_CONSTEXPR void on_day_of_month(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_day_of_month_space(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_24_hour(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_12_hour(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_minute(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_second(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_datetime(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_loc_date(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_loc_time(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_us_date() { unsupported(); }
+  FMT_CONSTEXPR void on_iso_date() { unsupported(); }
+  FMT_CONSTEXPR void on_12_hour_time() { unsupported(); }
+  FMT_CONSTEXPR void on_24_hour_time() { unsupported(); }
+  FMT_CONSTEXPR void on_iso_time() { unsupported(); }
+  FMT_CONSTEXPR void on_am_pm() { unsupported(); }
+  FMT_CONSTEXPR void on_duration_value() { unsupported(); }
+  FMT_CONSTEXPR void on_duration_unit() { unsupported(); }
+  FMT_CONSTEXPR void on_utc_offset() { unsupported(); }
+  FMT_CONSTEXPR void on_tz_name() { unsupported(); }
+};
+
+struct tm_format_checker : null_chrono_spec_handler<tm_format_checker> {
+  FMT_NORETURN void unsupported() { FMT_THROW(format_error("no format")); }
+
+  template <typename Char>
+  FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
+  FMT_CONSTEXPR void on_year(numeric_system) {}
+  FMT_CONSTEXPR void on_short_year(numeric_system) {}
+  FMT_CONSTEXPR void on_offset_year() {}
+  FMT_CONSTEXPR void on_century(numeric_system) {}
+  FMT_CONSTEXPR void on_iso_week_based_year() {}
+  FMT_CONSTEXPR void on_iso_week_based_short_year() {}
+  FMT_CONSTEXPR void on_abbr_weekday() {}
+  FMT_CONSTEXPR void on_full_weekday() {}
+  FMT_CONSTEXPR void on_dec0_weekday(numeric_system) {}
+  FMT_CONSTEXPR void on_dec1_weekday(numeric_system) {}
+  FMT_CONSTEXPR void on_abbr_month() {}
+  FMT_CONSTEXPR void on_full_month() {}
+  FMT_CONSTEXPR void on_dec_month(numeric_system) {}
+  FMT_CONSTEXPR void on_dec0_week_of_year(numeric_system) {}
+  FMT_CONSTEXPR void on_dec1_week_of_year(numeric_system) {}
+  FMT_CONSTEXPR void on_iso_week_of_year(numeric_system) {}
+  FMT_CONSTEXPR void on_day_of_year() {}
+  FMT_CONSTEXPR void on_day_of_month(numeric_system) {}
+  FMT_CONSTEXPR void on_day_of_month_space(numeric_system) {}
+  FMT_CONSTEXPR void on_24_hour(numeric_system) {}
+  FMT_CONSTEXPR void on_12_hour(numeric_system) {}
+  FMT_CONSTEXPR void on_minute(numeric_system) {}
+  FMT_CONSTEXPR void on_second(numeric_system) {}
+  FMT_CONSTEXPR void on_datetime(numeric_system) {}
+  FMT_CONSTEXPR void on_loc_date(numeric_system) {}
+  FMT_CONSTEXPR void on_loc_time(numeric_system) {}
+  FMT_CONSTEXPR void on_us_date() {}
+  FMT_CONSTEXPR void on_iso_date() {}
+  FMT_CONSTEXPR void on_12_hour_time() {}
+  FMT_CONSTEXPR void on_24_hour_time() {}
+  FMT_CONSTEXPR void on_iso_time() {}
+  FMT_CONSTEXPR void on_am_pm() {}
+  FMT_CONSTEXPR void on_utc_offset() {}
+  FMT_CONSTEXPR void on_tz_name() {}
+};
+
+inline const char* tm_wday_full_name(int wday) {
+  static constexpr const char* full_name_list[] = {
+      "Sunday",   "Monday", "Tuesday", "Wednesday",
+      "Thursday", "Friday", "Saturday"};
+  return wday >= 0 && wday <= 6 ? full_name_list[wday] : "?";
+}
+inline const char* tm_wday_short_name(int wday) {
+  static constexpr const char* short_name_list[] = {"Sun", "Mon", "Tue", "Wed",
+                                                    "Thu", "Fri", "Sat"};
+  return wday >= 0 && wday <= 6 ? short_name_list[wday] : "???";
+}
+
+inline const char* tm_mon_full_name(int mon) {
+  static constexpr const char* full_name_list[] = {
+      "January", "February", "March",     "April",   "May",      "June",
+      "July",    "August",   "September", "October", "November", "December"};
+  return mon >= 0 && mon <= 11 ? full_name_list[mon] : "?";
+}
+inline const char* tm_mon_short_name(int mon) {
+  static constexpr const char* short_name_list[] = {
+      "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+      "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
+  };
+  return mon >= 0 && mon <= 11 ? short_name_list[mon] : "???";
+}
+
+template <typename T, typename = void>
+struct has_member_data_tm_gmtoff : std::false_type {};
+template <typename T>
+struct has_member_data_tm_gmtoff<T, void_t<decltype(T::tm_gmtoff)>>
+    : std::true_type {};
+
+template <typename T, typename = void>
+struct has_member_data_tm_zone : std::false_type {};
+template <typename T>
+struct has_member_data_tm_zone<T, void_t<decltype(T::tm_zone)>>
+    : std::true_type {};
+
+#if FMT_USE_TZSET
+inline void tzset_once() {
+  static bool init = []() -> bool {
+    _tzset();
+    return true;
+  }();
+  ignore_unused(init);
+}
+#endif
+
+template <typename OutputIt, typename Char> class tm_writer {
+ private:
+  static constexpr int days_per_week = 7;
+
+  const std::locale& loc_;
+  const bool is_classic_;
+  OutputIt out_;
+  const std::tm& tm_;
+
+  auto tm_sec() const noexcept -> int {
+    FMT_ASSERT(tm_.tm_sec >= 0 && tm_.tm_sec <= 61, "");
+    return tm_.tm_sec;
+  }
+  auto tm_min() const noexcept -> int {
+    FMT_ASSERT(tm_.tm_min >= 0 && tm_.tm_min <= 59, "");
+    return tm_.tm_min;
+  }
+  auto tm_hour() const noexcept -> int {
+    FMT_ASSERT(tm_.tm_hour >= 0 && tm_.tm_hour <= 23, "");
+    return tm_.tm_hour;
+  }
+  auto tm_mday() const noexcept -> int {
+    FMT_ASSERT(tm_.tm_mday >= 1 && tm_.tm_mday <= 31, "");
+    return tm_.tm_mday;
+  }
+  auto tm_mon() const noexcept -> int {
+    FMT_ASSERT(tm_.tm_mon >= 0 && tm_.tm_mon <= 11, "");
+    return tm_.tm_mon;
+  }
+  auto tm_year() const noexcept -> long long { return 1900ll + tm_.tm_year; }
+  auto tm_wday() const noexcept -> int {
+    FMT_ASSERT(tm_.tm_wday >= 0 && tm_.tm_wday <= 6, "");
+    return tm_.tm_wday;
+  }
+  auto tm_yday() const noexcept -> int {
+    FMT_ASSERT(tm_.tm_yday >= 0 && tm_.tm_yday <= 365, "");
+    return tm_.tm_yday;
+  }
+
+  auto tm_hour12() const noexcept -> int {
+    const auto h = tm_hour();
+    const auto z = h < 12 ? h : h - 12;
+    return z == 0 ? 12 : z;
+  }
+
+  // POSIX and the C Standard are unclear or inconsistent about what %C and %y
+  // do if the year is negative or exceeds 9999. Use the convention that %C
+  // concatenated with %y yields the same output as %Y, and that %Y contains at
+  // least 4 characters, with more only if necessary.
+  auto split_year_lower(long long year) const noexcept -> int {
+    auto l = year % 100;
+    if (l < 0) l = -l;  // l in [0, 99]
+    return static_cast<int>(l);
+  }
+
+  // Algorithm:
+  // https://en.wikipedia.org/wiki/ISO_week_date#Calculating_the_week_number_from_a_month_and_day_of_the_month_or_ordinal_date
+  auto iso_year_weeks(long long curr_year) const noexcept -> int {
+    const auto prev_year = curr_year - 1;
+    const auto curr_p =
+        (curr_year + curr_year / 4 - curr_year / 100 + curr_year / 400) %
+        days_per_week;
+    const auto prev_p =
+        (prev_year + prev_year / 4 - prev_year / 100 + prev_year / 400) %
+        days_per_week;
+    return 52 + ((curr_p == 4 || prev_p == 3) ? 1 : 0);
+  }
+  auto iso_week_num(int tm_yday, int tm_wday) const noexcept -> int {
+    return (tm_yday + 11 - (tm_wday == 0 ? days_per_week : tm_wday)) /
+           days_per_week;
+  }
+  auto tm_iso_week_year() const noexcept -> long long {
+    const auto year = tm_year();
+    const auto w = iso_week_num(tm_yday(), tm_wday());
+    if (w < 1) return year - 1;
+    if (w > iso_year_weeks(year)) return year + 1;
+    return year;
+  }
+  auto tm_iso_week_of_year() const noexcept -> int {
+    const auto year = tm_year();
+    const auto w = iso_week_num(tm_yday(), tm_wday());
+    if (w < 1) return iso_year_weeks(year - 1);
+    if (w > iso_year_weeks(year)) return 1;
+    return w;
+  }
+
+  void write1(int value) {
+    *out_++ = static_cast<char>('0' + to_unsigned(value) % 10);
+  }
+  void write2(int value) {
+    const char* d = digits2(to_unsigned(value) % 100);
+    *out_++ = *d++;
+    *out_++ = *d;
+  }
+
+  void write_year_extended(long long year) {
+    // At least 4 characters.
+    int width = 4;
+    if (year < 0) {
+      *out_++ = '-';
+      year = 0 - year;
+      --width;
+    }
+    uint32_or_64_or_128_t<long long> n = to_unsigned(year);
+    const int num_digits = count_digits(n);
+    if (width > num_digits) out_ = std::fill_n(out_, width - num_digits, '0');
+    out_ = format_decimal<Char>(out_, n, num_digits).end;
+  }
+  void write_year(long long year) {
+    if (year >= 0 && year < 10000) {
+      write2(static_cast<int>(year / 100));
+      write2(static_cast<int>(year % 100));
+    } else {
+      write_year_extended(year);
+    }
+  }
+
+  void write_utc_offset(long offset) {
+    if (offset < 0) {
+      *out_++ = '-';
+      offset = -offset;
+    } else {
+      *out_++ = '+';
+    }
+    offset /= 60;
+    write2(static_cast<int>(offset / 60));
+    write2(static_cast<int>(offset % 60));
+  }
+  template <typename T, FMT_ENABLE_IF(has_member_data_tm_gmtoff<T>::value)>
+  void format_utc_offset_impl(const T& tm) {
+    write_utc_offset(tm.tm_gmtoff);
+  }
+  template <typename T, FMT_ENABLE_IF(!has_member_data_tm_gmtoff<T>::value)>
+  void format_utc_offset_impl(const T& tm) {
+#if defined(_WIN32) && defined(_UCRT)
+#  if FMT_USE_TZSET
+    tzset_once();
+#  endif
+    long offset = 0;
+    _get_timezone(&offset);
+    if (tm.tm_isdst) {
+      long dstbias = 0;
+      _get_dstbias(&dstbias);
+      offset += dstbias;
+    }
+    write_utc_offset(-offset);
+#else
+    ignore_unused(tm);
+    format_localized('z');
+#endif
+  }
+
+  template <typename T, FMT_ENABLE_IF(has_member_data_tm_zone<T>::value)>
+  void format_tz_name_impl(const T& tm) {
+    if (is_classic_)
+      out_ = write_tm_str<Char>(out_, tm.tm_zone, loc_);
+    else
+      format_localized('Z');
+  }
+  template <typename T, FMT_ENABLE_IF(!has_member_data_tm_zone<T>::value)>
+  void format_tz_name_impl(const T&) {
+    format_localized('Z');
+  }
+
+  void format_localized(char format, char modifier = 0) {
+    out_ = write<Char>(out_, tm_, loc_, format, modifier);
+  }
+
+ public:
+  tm_writer(const std::locale& loc, OutputIt out, const std::tm& tm)
+      : loc_(loc),
+        is_classic_(loc_ == get_classic_locale()),
+        out_(out),
+        tm_(tm) {}
+
+  OutputIt out() const { return out_; }
+
+  FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) {
+    out_ = copy_str<Char>(begin, end, out_);
+  }
+
+  void on_abbr_weekday() {
+    if (is_classic_)
+      out_ = write(out_, tm_wday_short_name(tm_wday()));
+    else
+      format_localized('a');
+  }
+  void on_full_weekday() {
+    if (is_classic_)
+      out_ = write(out_, tm_wday_full_name(tm_wday()));
+    else
+      format_localized('A');
+  }
+  void on_dec0_weekday(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard) return write1(tm_wday());
+    format_localized('w', 'O');
+  }
+  void on_dec1_weekday(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard) {
+      auto wday = tm_wday();
+      write1(wday == 0 ? days_per_week : wday);
+    } else {
+      format_localized('u', 'O');
+    }
+  }
+
+  void on_abbr_month() {
+    if (is_classic_)
+      out_ = write(out_, tm_mon_short_name(tm_mon()));
+    else
+      format_localized('b');
+  }
+  void on_full_month() {
+    if (is_classic_)
+      out_ = write(out_, tm_mon_full_name(tm_mon()));
+    else
+      format_localized('B');
+  }
+
+  void on_datetime(numeric_system ns) {
+    if (is_classic_) {
+      on_abbr_weekday();
+      *out_++ = ' ';
+      on_abbr_month();
+      *out_++ = ' ';
+      on_day_of_month_space(numeric_system::standard);
+      *out_++ = ' ';
+      on_iso_time();
+      *out_++ = ' ';
+      on_year(numeric_system::standard);
+    } else {
+      format_localized('c', ns == numeric_system::standard ? '\0' : 'E');
+    }
+  }
+  void on_loc_date(numeric_system ns) {
+    if (is_classic_)
+      on_us_date();
+    else
+      format_localized('x', ns == numeric_system::standard ? '\0' : 'E');
+  }
+  void on_loc_time(numeric_system ns) {
+    if (is_classic_)
+      on_iso_time();
+    else
+      format_localized('X', ns == numeric_system::standard ? '\0' : 'E');
+  }
+  void on_us_date() {
+    char buf[8];
+    write_digit2_separated(buf, to_unsigned(tm_mon() + 1),
+                           to_unsigned(tm_mday()),
+                           to_unsigned(split_year_lower(tm_year())), '/');
+    out_ = copy_str<Char>(std::begin(buf), std::end(buf), out_);
+  }
+  void on_iso_date() {
+    auto year = tm_year();
+    char buf[10];
+    size_t offset = 0;
+    if (year >= 0 && year < 10000) {
+      copy2(buf, digits2(to_unsigned(year / 100)));
+    } else {
+      offset = 4;
+      write_year_extended(year);
+      year = 0;
+    }
+    write_digit2_separated(buf + 2, static_cast<unsigned>(year % 100),
+                           to_unsigned(tm_mon() + 1), to_unsigned(tm_mday()),
+                           '-');
+    out_ = copy_str<Char>(std::begin(buf) + offset, std::end(buf), out_);
+  }
+
+  void on_utc_offset() { format_utc_offset_impl(tm_); }
+  void on_tz_name() { format_tz_name_impl(tm_); }
+
+  void on_year(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard)
+      return write_year(tm_year());
+    format_localized('Y', 'E');
+  }
+  void on_short_year(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard)
+      return write2(split_year_lower(tm_year()));
+    format_localized('y', 'O');
+  }
+  void on_offset_year() {
+    if (is_classic_) return write2(split_year_lower(tm_year()));
+    format_localized('y', 'E');
+  }
+
+  void on_century(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard) {
+      auto year = tm_year();
+      auto upper = year / 100;
+      if (year >= -99 && year < 0) {
+        // Zero upper on negative year.
+        *out_++ = '-';
+        *out_++ = '0';
+      } else if (upper >= 0 && upper < 100) {
+        write2(static_cast<int>(upper));
+      } else {
+        out_ = write<Char>(out_, upper);
+      }
+    } else {
+      format_localized('C', 'E');
+    }
+  }
+
+  void on_dec_month(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard)
+      return write2(tm_mon() + 1);
+    format_localized('m', 'O');
+  }
+
+  void on_dec0_week_of_year(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard)
+      return write2((tm_yday() + days_per_week - tm_wday()) / days_per_week);
+    format_localized('U', 'O');
+  }
+  void on_dec1_week_of_year(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard) {
+      auto wday = tm_wday();
+      write2((tm_yday() + days_per_week -
+              (wday == 0 ? (days_per_week - 1) : (wday - 1))) /
+             days_per_week);
+    } else {
+      format_localized('W', 'O');
+    }
+  }
+  void on_iso_week_of_year(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard)
+      return write2(tm_iso_week_of_year());
+    format_localized('V', 'O');
+  }
+
+  void on_iso_week_based_year() { write_year(tm_iso_week_year()); }
+  void on_iso_week_based_short_year() {
+    write2(split_year_lower(tm_iso_week_year()));
+  }
+
+  void on_day_of_year() {
+    auto yday = tm_yday() + 1;
+    write1(yday / 100);
+    write2(yday % 100);
+  }
+  void on_day_of_month(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard) return write2(tm_mday());
+    format_localized('d', 'O');
+  }
+  void on_day_of_month_space(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard) {
+      auto mday = to_unsigned(tm_mday()) % 100;
+      const char* d2 = digits2(mday);
+      *out_++ = mday < 10 ? ' ' : d2[0];
+      *out_++ = d2[1];
+    } else {
+      format_localized('e', 'O');
+    }
+  }
+
+  void on_24_hour(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard) return write2(tm_hour());
+    format_localized('H', 'O');
+  }
+  void on_12_hour(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard)
+      return write2(tm_hour12());
+    format_localized('I', 'O');
+  }
+  void on_minute(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard) return write2(tm_min());
+    format_localized('M', 'O');
+  }
+  void on_second(numeric_system ns) {
+    if (is_classic_ || ns == numeric_system::standard) return write2(tm_sec());
+    format_localized('S', 'O');
+  }
+
+  void on_12_hour_time() {
+    if (is_classic_) {
+      char buf[8];
+      write_digit2_separated(buf, to_unsigned(tm_hour12()),
+                             to_unsigned(tm_min()), to_unsigned(tm_sec()), ':');
+      out_ = copy_str<Char>(std::begin(buf), std::end(buf), out_);
+      *out_++ = ' ';
+      on_am_pm();
+    } else {
+      format_localized('r');
+    }
+  }
+  void on_24_hour_time() {
+    write2(tm_hour());
+    *out_++ = ':';
+    write2(tm_min());
+  }
+  void on_iso_time() {
+    char buf[8];
+    write_digit2_separated(buf, to_unsigned(tm_hour()), to_unsigned(tm_min()),
+                           to_unsigned(tm_sec()), ':');
+    out_ = copy_str<Char>(std::begin(buf), std::end(buf), out_);
+  }
+
+  void on_am_pm() {
+    if (is_classic_) {
+      *out_++ = tm_hour() < 12 ? 'A' : 'P';
+      *out_++ = 'M';
+    } else {
+      format_localized('p');
+    }
+  }
+
+  // These apply to chrono durations but not tm.
+  void on_duration_value() {}
+  void on_duration_unit() {}
+};
+
+struct chrono_format_checker : null_chrono_spec_handler<chrono_format_checker> {
+  FMT_NORETURN void unsupported() { FMT_THROW(format_error("no date")); }
+
+  template <typename Char>
+  FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
+  FMT_CONSTEXPR void on_24_hour(numeric_system) {}
+  FMT_CONSTEXPR void on_12_hour(numeric_system) {}
+  FMT_CONSTEXPR void on_minute(numeric_system) {}
+  FMT_CONSTEXPR void on_second(numeric_system) {}
+  FMT_CONSTEXPR void on_12_hour_time() {}
+  FMT_CONSTEXPR void on_24_hour_time() {}
+  FMT_CONSTEXPR void on_iso_time() {}
+  FMT_CONSTEXPR void on_am_pm() {}
+  FMT_CONSTEXPR void on_duration_value() {}
+  FMT_CONSTEXPR void on_duration_unit() {}
+};
+
+template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+inline bool isnan(T) {
+  return false;
+}
+template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+inline bool isnan(T value) {
+  return std::isnan(value);
+}
+
+template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+inline bool isfinite(T) {
+  return true;
+}
+
+// Converts value to Int and checks that it's in the range [0, upper).
+template <typename T, typename Int, FMT_ENABLE_IF(std::is_integral<T>::value)>
+inline Int to_nonnegative_int(T value, Int upper) {
+  FMT_ASSERT(value >= 0 && to_unsigned(value) <= to_unsigned(upper),
+             "invalid value");
+  (void)upper;
+  return static_cast<Int>(value);
+}
+template <typename T, typename Int, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+inline Int to_nonnegative_int(T value, Int upper) {
+  if (value < 0 || value > static_cast<T>(upper))
+    FMT_THROW(format_error("invalid value"));
+  return static_cast<Int>(value);
+}
+
+template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+inline T mod(T x, int y) {
+  return x % static_cast<T>(y);
+}
+template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+inline T mod(T x, int y) {
+  return std::fmod(x, static_cast<T>(y));
+}
+
+// If T is an integral type, maps T to its unsigned counterpart, otherwise
+// leaves it unchanged (unlike std::make_unsigned).
+template <typename T, bool INTEGRAL = std::is_integral<T>::value>
+struct make_unsigned_or_unchanged {
+  using type = T;
+};
+
+template <typename T> struct make_unsigned_or_unchanged<T, true> {
+  using type = typename std::make_unsigned<T>::type;
+};
+
+#if FMT_SAFE_DURATION_CAST
+// throwing version of safe_duration_cast
+template <typename To, typename FromRep, typename FromPeriod>
+To fmt_safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from) {
+  int ec;
+  To to = safe_duration_cast::safe_duration_cast<To>(from, ec);
+  if (ec) FMT_THROW(format_error("cannot format duration"));
+  return to;
+}
+#endif
+
+template <typename Rep, typename Period,
+          FMT_ENABLE_IF(std::is_integral<Rep>::value)>
+inline std::chrono::duration<Rep, std::milli> get_milliseconds(
+    std::chrono::duration<Rep, Period> d) {
+  // this may overflow and/or the result may not fit in the
+  // target type.
+#if FMT_SAFE_DURATION_CAST
+  using CommonSecondsType =
+      typename std::common_type<decltype(d), std::chrono::seconds>::type;
+  const auto d_as_common = fmt_safe_duration_cast<CommonSecondsType>(d);
+  const auto d_as_whole_seconds =
+      fmt_safe_duration_cast<std::chrono::seconds>(d_as_common);
+  // this conversion should be nonproblematic
+  const auto diff = d_as_common - d_as_whole_seconds;
+  const auto ms =
+      fmt_safe_duration_cast<std::chrono::duration<Rep, std::milli>>(diff);
+  return ms;
+#else
+  auto s = std::chrono::duration_cast<std::chrono::seconds>(d);
+  return std::chrono::duration_cast<std::chrono::milliseconds>(d - s);
+#endif
+}
+
+// Returns the number of fractional digits in the range [0, 18] according to the
+// C++20 spec. If more than 18 fractional digits are required then returns 6 for
+// microseconds precision.
+constexpr int count_fractional_digits(long long num, long long den, int n = 0) {
+  return num % den == 0
+             ? n
+             : (n > 18 ? 6 : count_fractional_digits(num * 10, den, n + 1));
+}
+
+constexpr long long pow10(std::uint32_t n) {
+  return n == 0 ? 1 : 10 * pow10(n - 1);
+}
+
+template <class Rep, class Period,
+          FMT_ENABLE_IF(std::numeric_limits<Rep>::is_signed)>
+constexpr std::chrono::duration<Rep, Period> abs(
+    std::chrono::duration<Rep, Period> d) {
+  // We need to compare the duration using the count() method directly
+  // due to a compiler bug in clang-11 regarding the spaceship operator,
+  // when -Wzero-as-null-pointer-constant is enabled.
+  // In clang-12 the bug has been fixed. See
+  // https://bugs.llvm.org/show_bug.cgi?id=46235 and the reproducible example:
+  // https://www.godbolt.org/z/Knbb5joYx.
+  return d.count() >= d.zero().count() ? d : -d;
+}
+
+template <class Rep, class Period,
+          FMT_ENABLE_IF(!std::numeric_limits<Rep>::is_signed)>
+constexpr std::chrono::duration<Rep, Period> abs(
+    std::chrono::duration<Rep, Period> d) {
+  return d;
+}
+
+template <typename Char, typename Rep, typename OutputIt,
+          FMT_ENABLE_IF(std::is_integral<Rep>::value)>
+OutputIt format_duration_value(OutputIt out, Rep val, int) {
+  return write<Char>(out, val);
+}
+
+template <typename Char, typename Rep, typename OutputIt,
+          FMT_ENABLE_IF(std::is_floating_point<Rep>::value)>
+OutputIt format_duration_value(OutputIt out, Rep val, int precision) {
+  auto specs = basic_format_specs<Char>();
+  specs.precision = precision;
+  specs.type = precision >= 0 ? presentation_type::fixed_lower
+                              : presentation_type::general_lower;
+  return write<Char>(out, val, specs);
+}
+
+template <typename Char, typename OutputIt>
+OutputIt copy_unit(string_view unit, OutputIt out, Char) {
+  return std::copy(unit.begin(), unit.end(), out);
+}
+
+template <typename OutputIt>
+OutputIt copy_unit(string_view unit, OutputIt out, wchar_t) {
+  // This works when wchar_t is UTF-32 because units only contain characters
+  // that have the same representation in UTF-16 and UTF-32.
+  utf8_to_utf16 u(unit);
+  return std::copy(u.c_str(), u.c_str() + u.size(), out);
+}
+
+template <typename Char, typename Period, typename OutputIt>
+OutputIt format_duration_unit(OutputIt out) {
+  if (const char* unit = get_units<Period>())
+    return copy_unit(string_view(unit), out, Char());
+  *out++ = '[';
+  out = write<Char>(out, Period::num);
+  if (const_check(Period::den != 1)) {
+    *out++ = '/';
+    out = write<Char>(out, Period::den);
+  }
+  *out++ = ']';
+  *out++ = 's';
+  return out;
+}
+
+class get_locale {
+ private:
+  union {
+    std::locale locale_;
+  };
+  bool has_locale_ = false;
+
+ public:
+  get_locale(bool localized, locale_ref loc) : has_locale_(localized) {
+    if (localized)
+      ::new (&locale_) std::locale(loc.template get<std::locale>());
+  }
+  ~get_locale() {
+    if (has_locale_) locale_.~locale();
+  }
+  operator const std::locale&() const {
+    return has_locale_ ? locale_ : get_classic_locale();
+  }
+};
+
+template <typename FormatContext, typename OutputIt, typename Rep,
+          typename Period>
+struct chrono_formatter {
+  FormatContext& context;
+  OutputIt out;
+  int precision;
+  bool localized = false;
+  // rep is unsigned to avoid overflow.
+  using rep =
+      conditional_t<std::is_integral<Rep>::value && sizeof(Rep) < sizeof(int),
+                    unsigned, typename make_unsigned_or_unchanged<Rep>::type>;
+  rep val;
+  using seconds = std::chrono::duration<rep>;
+  seconds s;
+  using milliseconds = std::chrono::duration<rep, std::milli>;
+  bool negative;
+
+  using char_type = typename FormatContext::char_type;
+  using tm_writer_type = tm_writer<OutputIt, char_type>;
+
+  chrono_formatter(FormatContext& ctx, OutputIt o,
+                   std::chrono::duration<Rep, Period> d)
+      : context(ctx),
+        out(o),
+        val(static_cast<rep>(d.count())),
+        negative(false) {
+    if (d.count() < 0) {
+      val = 0 - val;
+      negative = true;
+    }
+
+    // this may overflow and/or the result may not fit in the
+    // target type.
+#if FMT_SAFE_DURATION_CAST
+    // might need checked conversion (rep!=Rep)
+    auto tmpval = std::chrono::duration<rep, Period>(val);
+    s = fmt_safe_duration_cast<seconds>(tmpval);
+#else
+    s = std::chrono::duration_cast<seconds>(
+        std::chrono::duration<rep, Period>(val));
+#endif
+  }
+
+  // returns true if nan or inf, writes to out.
+  bool handle_nan_inf() {
+    if (isfinite(val)) {
+      return false;
+    }
+    if (isnan(val)) {
+      write_nan();
+      return true;
+    }
+    // must be +-inf
+    if (val > 0) {
+      write_pinf();
+    } else {
+      write_ninf();
+    }
+    return true;
+  }
+
+  Rep hour() const { return static_cast<Rep>(mod((s.count() / 3600), 24)); }
+
+  Rep hour12() const {
+    Rep hour = static_cast<Rep>(mod((s.count() / 3600), 12));
+    return hour <= 0 ? 12 : hour;
+  }
+
+  Rep minute() const { return static_cast<Rep>(mod((s.count() / 60), 60)); }
+  Rep second() const { return static_cast<Rep>(mod(s.count(), 60)); }
+
+  std::tm time() const {
+    auto time = std::tm();
+    time.tm_hour = to_nonnegative_int(hour(), 24);
+    time.tm_min = to_nonnegative_int(minute(), 60);
+    time.tm_sec = to_nonnegative_int(second(), 60);
+    return time;
+  }
+
+  void write_sign() {
+    if (negative) {
+      *out++ = '-';
+      negative = false;
+    }
+  }
+
+  void write(Rep value, int width) {
+    write_sign();
+    if (isnan(value)) return write_nan();
+    uint32_or_64_or_128_t<int> n =
+        to_unsigned(to_nonnegative_int(value, max_value<int>()));
+    int num_digits = detail::count_digits(n);
+    if (width > num_digits) out = std::fill_n(out, width - num_digits, '0');
+    out = format_decimal<char_type>(out, n, num_digits).end;
+  }
+
+  template <class Duration> void write_fractional_seconds(Duration d) {
+    constexpr auto num_fractional_digits =
+        count_fractional_digits(Duration::period::num, Duration::period::den);
+
+    using subsecond_precision = std::chrono::duration<
+        typename std::common_type<typename Duration::rep,
+                                  std::chrono::seconds::rep>::type,
+        std::ratio<1, detail::pow10(num_fractional_digits)>>;
+    if (std::ratio_less<typename subsecond_precision::period,
+                        std::chrono::seconds::period>::value) {
+      *out++ = '.';
+      // Don't convert long double to integer seconds to avoid overflow.
+      using sec = conditional_t<
+          std::is_same<typename Duration::rep, long double>::value,
+          std::chrono::duration<long double>, std::chrono::seconds>;
+      auto fractional = detail::abs(d) - std::chrono::duration_cast<sec>(d);
+      const auto subseconds =
+          std::chrono::treat_as_floating_point<
+              typename subsecond_precision::rep>::value
+              ? fractional.count()
+              : std::chrono::duration_cast<subsecond_precision>(fractional)
+                    .count();
+      uint32_or_64_or_128_t<long long> n =
+          to_unsigned(to_nonnegative_int(subseconds, max_value<long long>()));
+      int num_digits = detail::count_digits(n);
+      if (num_fractional_digits > num_digits)
+        out = std::fill_n(out, num_fractional_digits - num_digits, '0');
+      out = format_decimal<char_type>(out, n, num_digits).end;
+    }
+  }
+
+  void write_nan() { std::copy_n("nan", 3, out); }
+  void write_pinf() { std::copy_n("inf", 3, out); }
+  void write_ninf() { std::copy_n("-inf", 4, out); }
+
+  template <typename Callback, typename... Args>
+  void format_tm(const tm& time, Callback cb, Args... args) {
+    if (isnan(val)) return write_nan();
+    get_locale loc(localized, context.locale());
+    auto w = tm_writer_type(loc, out, time);
+    (w.*cb)(args...);
+    out = w.out();
+  }
+
+  void on_text(const char_type* begin, const char_type* end) {
+    std::copy(begin, end, out);
+  }
+
+  // These are not implemented because durations don't have date information.
+  void on_abbr_weekday() {}
+  void on_full_weekday() {}
+  void on_dec0_weekday(numeric_system) {}
+  void on_dec1_weekday(numeric_system) {}
+  void on_abbr_month() {}
+  void on_full_month() {}
+  void on_datetime(numeric_system) {}
+  void on_loc_date(numeric_system) {}
+  void on_loc_time(numeric_system) {}
+  void on_us_date() {}
+  void on_iso_date() {}
+  void on_utc_offset() {}
+  void on_tz_name() {}
+  void on_year(numeric_system) {}
+  void on_short_year(numeric_system) {}
+  void on_offset_year() {}
+  void on_century(numeric_system) {}
+  void on_iso_week_based_year() {}
+  void on_iso_week_based_short_year() {}
+  void on_dec_month(numeric_system) {}
+  void on_dec0_week_of_year(numeric_system) {}
+  void on_dec1_week_of_year(numeric_system) {}
+  void on_iso_week_of_year(numeric_system) {}
+  void on_day_of_year() {}
+  void on_day_of_month(numeric_system) {}
+  void on_day_of_month_space(numeric_system) {}
+
+  void on_24_hour(numeric_system ns) {
+    if (handle_nan_inf()) return;
+
+    if (ns == numeric_system::standard) return write(hour(), 2);
+    auto time = tm();
+    time.tm_hour = to_nonnegative_int(hour(), 24);
+    format_tm(time, &tm_writer_type::on_24_hour, ns);
+  }
+
+  void on_12_hour(numeric_system ns) {
+    if (handle_nan_inf()) return;
+
+    if (ns == numeric_system::standard) return write(hour12(), 2);
+    auto time = tm();
+    time.tm_hour = to_nonnegative_int(hour12(), 12);
+    format_tm(time, &tm_writer_type::on_12_hour, ns);
+  }
+
+  void on_minute(numeric_system ns) {
+    if (handle_nan_inf()) return;
+
+    if (ns == numeric_system::standard) return write(minute(), 2);
+    auto time = tm();
+    time.tm_min = to_nonnegative_int(minute(), 60);
+    format_tm(time, &tm_writer_type::on_minute, ns);
+  }
+
+  void on_second(numeric_system ns) {
+    if (handle_nan_inf()) return;
+
+    if (ns == numeric_system::standard) {
+      write(second(), 2);
+      write_fractional_seconds(std::chrono::duration<rep, Period>{val});
+      return;
+    }
+    auto time = tm();
+    time.tm_sec = to_nonnegative_int(second(), 60);
+    format_tm(time, &tm_writer_type::on_second, ns);
+  }
+
+  void on_12_hour_time() {
+    if (handle_nan_inf()) return;
+    format_tm(time(), &tm_writer_type::on_12_hour_time);
+  }
+
+  void on_24_hour_time() {
+    if (handle_nan_inf()) {
+      *out++ = ':';
+      handle_nan_inf();
+      return;
+    }
+
+    write(hour(), 2);
+    *out++ = ':';
+    write(minute(), 2);
+  }
+
+  void on_iso_time() {
+    on_24_hour_time();
+    *out++ = ':';
+    if (handle_nan_inf()) return;
+    on_second(numeric_system::standard);
+  }
+
+  void on_am_pm() {
+    if (handle_nan_inf()) return;
+    format_tm(time(), &tm_writer_type::on_am_pm);
+  }
+
+  void on_duration_value() {
+    if (handle_nan_inf()) return;
+    write_sign();
+    out = format_duration_value<char_type>(out, val, precision);
+  }
+
+  void on_duration_unit() {
+    out = format_duration_unit<char_type, Period>(out);
+  }
+};
+
+FMT_END_DETAIL_NAMESPACE
+
+#if defined(__cpp_lib_chrono) && __cpp_lib_chrono >= 201907
+using weekday = std::chrono::weekday;
+#else
+// A fallback version of weekday.
+class weekday {
+ private:
+  unsigned char value;
+
+ public:
+  weekday() = default;
+  explicit constexpr weekday(unsigned wd) noexcept
+      : value(static_cast<unsigned char>(wd != 7 ? wd : 0)) {}
+  constexpr unsigned c_encoding() const noexcept { return value; }
+};
+
+class year_month_day {};
+#endif
+
+// A rudimentary weekday formatter.
+template <typename Char> struct formatter<weekday, Char> {
+ private:
+  bool localized = false;
+
+ public:
+  FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
+      -> decltype(ctx.begin()) {
+    auto begin = ctx.begin(), end = ctx.end();
+    if (begin != end && *begin == 'L') {
+      ++begin;
+      localized = true;
+    }
+    return begin;
+  }
+
+  template <typename FormatContext>
+  auto format(weekday wd, FormatContext& ctx) const -> decltype(ctx.out()) {
+    auto time = std::tm();
+    time.tm_wday = static_cast<int>(wd.c_encoding());
+    detail::get_locale loc(localized, ctx.locale());
+    auto w = detail::tm_writer<decltype(ctx.out()), Char>(loc, ctx.out(), time);
+    w.on_abbr_weekday();
+    return w.out();
+  }
+};
+
+template <typename Rep, typename Period, typename Char>
+struct formatter<std::chrono::duration<Rep, Period>, Char> {
+ private:
+  basic_format_specs<Char> specs;
+  int precision = -1;
+  using arg_ref_type = detail::arg_ref<Char>;
+  arg_ref_type width_ref;
+  arg_ref_type precision_ref;
+  bool localized = false;
+  basic_string_view<Char> format_str;
+  using duration = std::chrono::duration<Rep, Period>;
+
+  struct spec_handler {
+    formatter& f;
+    basic_format_parse_context<Char>& context;
+    basic_string_view<Char> format_str;
+
+    template <typename Id> FMT_CONSTEXPR arg_ref_type make_arg_ref(Id arg_id) {
+      context.check_arg_id(arg_id);
+      return arg_ref_type(arg_id);
+    }
+
+    FMT_CONSTEXPR arg_ref_type make_arg_ref(basic_string_view<Char> arg_id) {
+      context.check_arg_id(arg_id);
+      return arg_ref_type(arg_id);
+    }
+
+    FMT_CONSTEXPR arg_ref_type make_arg_ref(detail::auto_id) {
+      return arg_ref_type(context.next_arg_id());
+    }
+
+    void on_error(const char* msg) { FMT_THROW(format_error(msg)); }
+    FMT_CONSTEXPR void on_fill(basic_string_view<Char> fill) {
+      f.specs.fill = fill;
+    }
+    FMT_CONSTEXPR void on_align(align_t align) { f.specs.align = align; }
+    FMT_CONSTEXPR void on_width(int width) { f.specs.width = width; }
+    FMT_CONSTEXPR void on_precision(int _precision) {
+      f.precision = _precision;
+    }
+    FMT_CONSTEXPR void end_precision() {}
+
+    template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
+      f.width_ref = make_arg_ref(arg_id);
+    }
+
+    template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
+      f.precision_ref = make_arg_ref(arg_id);
+    }
+  };
+
+  using iterator = typename basic_format_parse_context<Char>::iterator;
+  struct parse_range {
+    iterator begin;
+    iterator end;
+  };
+
+  FMT_CONSTEXPR parse_range do_parse(basic_format_parse_context<Char>& ctx) {
+    auto begin = ctx.begin(), end = ctx.end();
+    if (begin == end || *begin == '}') return {begin, begin};
+    spec_handler handler{*this, ctx, format_str};
+    begin = detail::parse_align(begin, end, handler);
+    if (begin == end) return {begin, begin};
+    begin = detail::parse_width(begin, end, handler);
+    if (begin == end) return {begin, begin};
+    if (*begin == '.') {
+      if (std::is_floating_point<Rep>::value)
+        begin = detail::parse_precision(begin, end, handler);
+      else
+        handler.on_error("precision not allowed for this argument type");
+    }
+    if (begin != end && *begin == 'L') {
+      ++begin;
+      localized = true;
+    }
+    end = detail::parse_chrono_format(begin, end,
+                                      detail::chrono_format_checker());
+    return {begin, end};
+  }
+
+ public:
+  FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
+      -> decltype(ctx.begin()) {
+    auto range = do_parse(ctx);
+    format_str = basic_string_view<Char>(
+        &*range.begin, detail::to_unsigned(range.end - range.begin));
+    return range.end;
+  }
+
+  template <typename FormatContext>
+  auto format(const duration& d, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    auto specs_copy = specs;
+    auto precision_copy = precision;
+    auto begin = format_str.begin(), end = format_str.end();
+    // As a possible future optimization, we could avoid extra copying if width
+    // is not specified.
+    basic_memory_buffer<Char> buf;
+    auto out = std::back_inserter(buf);
+    detail::handle_dynamic_spec<detail::width_checker>(specs_copy.width,
+                                                       width_ref, ctx);
+    detail::handle_dynamic_spec<detail::precision_checker>(precision_copy,
+                                                           precision_ref, ctx);
+    if (begin == end || *begin == '}') {
+      out = detail::format_duration_value<Char>(out, d.count(), precision_copy);
+      detail::format_duration_unit<Char, Period>(out);
+    } else {
+      detail::chrono_formatter<FormatContext, decltype(out), Rep, Period> f(
+          ctx, out, d);
+      f.precision = precision_copy;
+      f.localized = localized;
+      detail::parse_chrono_format(begin, end, f);
+    }
+    return detail::write(
+        ctx.out(), basic_string_view<Char>(buf.data(), buf.size()), specs_copy);
+  }
+};
+
+template <typename Char, typename Duration>
+struct formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
+                 Char> : formatter<std::tm, Char> {
+  FMT_CONSTEXPR formatter() {
+    this->do_parse(default_specs,
+                   default_specs + sizeof(default_specs) / sizeof(Char));
+  }
+
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return this->do_parse(ctx.begin(), ctx.end(), true);
+  }
+
+  template <typename FormatContext>
+  auto format(std::chrono::time_point<std::chrono::system_clock> val,
+              FormatContext& ctx) const -> decltype(ctx.out()) {
+    return formatter<std::tm, Char>::format(localtime(val), ctx);
+  }
+
+  static constexpr const Char default_specs[] = {'%', 'F', ' ', '%', 'T'};
+};
+
+template <typename Char, typename Duration>
+constexpr const Char
+    formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
+              Char>::default_specs[];
+
+template <typename Char> struct formatter<std::tm, Char> {
+ private:
+  enum class spec {
+    unknown,
+    year_month_day,
+    hh_mm_ss,
+  };
+  spec spec_ = spec::unknown;
+  basic_string_view<Char> specs;
+
+ protected:
+  template <typename It>
+  FMT_CONSTEXPR auto do_parse(It begin, It end, bool with_default = false)
+      -> It {
+    if (begin != end && *begin == ':') ++begin;
+    end = detail::parse_chrono_format(begin, end, detail::tm_format_checker());
+    if (!with_default || end != begin)
+      specs = {begin, detail::to_unsigned(end - begin)};
+    // basic_string_view<>::compare isn't constexpr before C++17.
+    if (specs.size() == 2 && specs[0] == Char('%')) {
+      if (specs[1] == Char('F'))
+        spec_ = spec::year_month_day;
+      else if (specs[1] == Char('T'))
+        spec_ = spec::hh_mm_ss;
+    }
+    return end;
+  }
+
+ public:
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return this->do_parse(ctx.begin(), ctx.end());
+  }
+
+  template <typename FormatContext>
+  auto format(const std::tm& tm, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    const auto loc_ref = ctx.locale();
+    detail::get_locale loc(static_cast<bool>(loc_ref), loc_ref);
+    auto w = detail::tm_writer<decltype(ctx.out()), Char>(loc, ctx.out(), tm);
+    if (spec_ == spec::year_month_day)
+      w.on_iso_date();
+    else if (spec_ == spec::hh_mm_ss)
+      w.on_iso_time();
+    else
+      detail::parse_chrono_format(specs.begin(), specs.end(), w);
+    return w.out();
+  }
+};
+
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_CHRONO_H_
diff --git a/3rdparty/fmt/include/fmt/color.h b/3rdparty/fmt/include/fmt/color.h
new file mode 100644
index 00000000..dfbe4829
--- /dev/null
+++ b/3rdparty/fmt/include/fmt/color.h
@@ -0,0 +1,638 @@
+// Formatting library for C++ - color support
+//
+// Copyright (c) 2018 - present, Victor Zverovich and fmt contributors
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_COLOR_H_
+#define FMT_COLOR_H_
+
+#include "format.h"
+
+// __declspec(deprecated) is broken in some MSVC versions.
+#if FMT_MSC_VER
+#  define FMT_DEPRECATED_NONMSVC
+#else
+#  define FMT_DEPRECATED_NONMSVC FMT_DEPRECATED
+#endif
+
+FMT_BEGIN_NAMESPACE
+FMT_MODULE_EXPORT_BEGIN
+
+enum class color : uint32_t {
+  alice_blue = 0xF0F8FF,               // rgb(240,248,255)
+  antique_white = 0xFAEBD7,            // rgb(250,235,215)
+  aqua = 0x00FFFF,                     // rgb(0,255,255)
+  aquamarine = 0x7FFFD4,               // rgb(127,255,212)
+  azure = 0xF0FFFF,                    // rgb(240,255,255)
+  beige = 0xF5F5DC,                    // rgb(245,245,220)
+  bisque = 0xFFE4C4,                   // rgb(255,228,196)
+  black = 0x000000,                    // rgb(0,0,0)
+  blanched_almond = 0xFFEBCD,          // rgb(255,235,205)
+  blue = 0x0000FF,                     // rgb(0,0,255)
+  blue_violet = 0x8A2BE2,              // rgb(138,43,226)
+  brown = 0xA52A2A,                    // rgb(165,42,42)
+  burly_wood = 0xDEB887,               // rgb(222,184,135)
+  cadet_blue = 0x5F9EA0,               // rgb(95,158,160)
+  chartreuse = 0x7FFF00,               // rgb(127,255,0)
+  chocolate = 0xD2691E,                // rgb(210,105,30)
+  coral = 0xFF7F50,                    // rgb(255,127,80)
+  cornflower_blue = 0x6495ED,          // rgb(100,149,237)
+  cornsilk = 0xFFF8DC,                 // rgb(255,248,220)
+  crimson = 0xDC143C,                  // rgb(220,20,60)
+  cyan = 0x00FFFF,                     // rgb(0,255,255)
+  dark_blue = 0x00008B,                // rgb(0,0,139)
+  dark_cyan = 0x008B8B,                // rgb(0,139,139)
+  dark_golden_rod = 0xB8860B,          // rgb(184,134,11)
+  dark_gray = 0xA9A9A9,                // rgb(169,169,169)
+  dark_green = 0x006400,               // rgb(0,100,0)
+  dark_khaki = 0xBDB76B,               // rgb(189,183,107)
+  dark_magenta = 0x8B008B,             // rgb(139,0,139)
+  dark_olive_green = 0x556B2F,         // rgb(85,107,47)
+  dark_orange = 0xFF8C00,              // rgb(255,140,0)
+  dark_orchid = 0x9932CC,              // rgb(153,50,204)
+  dark_red = 0x8B0000,                 // rgb(139,0,0)
+  dark_salmon = 0xE9967A,              // rgb(233,150,122)
+  dark_sea_green = 0x8FBC8F,           // rgb(143,188,143)
+  dark_slate_blue = 0x483D8B,          // rgb(72,61,139)
+  dark_slate_gray = 0x2F4F4F,          // rgb(47,79,79)
+  dark_turquoise = 0x00CED1,           // rgb(0,206,209)
+  dark_violet = 0x9400D3,              // rgb(148,0,211)
+  deep_pink = 0xFF1493,                // rgb(255,20,147)
+  deep_sky_blue = 0x00BFFF,            // rgb(0,191,255)
+  dim_gray = 0x696969,                 // rgb(105,105,105)
+  dodger_blue = 0x1E90FF,              // rgb(30,144,255)
+  fire_brick = 0xB22222,               // rgb(178,34,34)
+  floral_white = 0xFFFAF0,             // rgb(255,250,240)
+  forest_green = 0x228B22,             // rgb(34,139,34)
+  fuchsia = 0xFF00FF,                  // rgb(255,0,255)
+  gainsboro = 0xDCDCDC,                // rgb(220,220,220)
+  ghost_white = 0xF8F8FF,              // rgb(248,248,255)
+  gold = 0xFFD700,                     // rgb(255,215,0)
+  golden_rod = 0xDAA520,               // rgb(218,165,32)
+  gray = 0x808080,                     // rgb(128,128,128)
+  green = 0x008000,                    // rgb(0,128,0)
+  green_yellow = 0xADFF2F,             // rgb(173,255,47)
+  honey_dew = 0xF0FFF0,                // rgb(240,255,240)
+  hot_pink = 0xFF69B4,                 // rgb(255,105,180)
+  indian_red = 0xCD5C5C,               // rgb(205,92,92)
+  indigo = 0x4B0082,                   // rgb(75,0,130)
+  ivory = 0xFFFFF0,                    // rgb(255,255,240)
+  khaki = 0xF0E68C,                    // rgb(240,230,140)
+  lavender = 0xE6E6FA,                 // rgb(230,230,250)
+  lavender_blush = 0xFFF0F5,           // rgb(255,240,245)
+  lawn_green = 0x7CFC00,               // rgb(124,252,0)
+  lemon_chiffon = 0xFFFACD,            // rgb(255,250,205)
+  light_blue = 0xADD8E6,               // rgb(173,216,230)
+  light_coral = 0xF08080,              // rgb(240,128,128)
+  light_cyan = 0xE0FFFF,               // rgb(224,255,255)
+  light_golden_rod_yellow = 0xFAFAD2,  // rgb(250,250,210)
+  light_gray = 0xD3D3D3,               // rgb(211,211,211)
+  light_green = 0x90EE90,              // rgb(144,238,144)
+  light_pink = 0xFFB6C1,               // rgb(255,182,193)
+  light_salmon = 0xFFA07A,             // rgb(255,160,122)
+  light_sea_green = 0x20B2AA,          // rgb(32,178,170)
+  light_sky_blue = 0x87CEFA,           // rgb(135,206,250)
+  light_slate_gray = 0x778899,         // rgb(119,136,153)
+  light_steel_blue = 0xB0C4DE,         // rgb(176,196,222)
+  light_yellow = 0xFFFFE0,             // rgb(255,255,224)
+  lime = 0x00FF00,                     // rgb(0,255,0)
+  lime_green = 0x32CD32,               // rgb(50,205,50)
+  linen = 0xFAF0E6,                    // rgb(250,240,230)
+  magenta = 0xFF00FF,                  // rgb(255,0,255)
+  maroon = 0x800000,                   // rgb(128,0,0)
+  medium_aquamarine = 0x66CDAA,        // rgb(102,205,170)
+  medium_blue = 0x0000CD,              // rgb(0,0,205)
+  medium_orchid = 0xBA55D3,            // rgb(186,85,211)
+  medium_purple = 0x9370DB,            // rgb(147,112,219)
+  medium_sea_green = 0x3CB371,         // rgb(60,179,113)
+  medium_slate_blue = 0x7B68EE,        // rgb(123,104,238)
+  medium_spring_green = 0x00FA9A,      // rgb(0,250,154)
+  medium_turquoise = 0x48D1CC,         // rgb(72,209,204)
+  medium_violet_red = 0xC71585,        // rgb(199,21,133)
+  midnight_blue = 0x191970,            // rgb(25,25,112)
+  mint_cream = 0xF5FFFA,               // rgb(245,255,250)
+  misty_rose = 0xFFE4E1,               // rgb(255,228,225)
+  moccasin = 0xFFE4B5,                 // rgb(255,228,181)
+  navajo_white = 0xFFDEAD,             // rgb(255,222,173)
+  navy = 0x000080,                     // rgb(0,0,128)
+  old_lace = 0xFDF5E6,                 // rgb(253,245,230)
+  olive = 0x808000,                    // rgb(128,128,0)
+  olive_drab = 0x6B8E23,               // rgb(107,142,35)
+  orange = 0xFFA500,                   // rgb(255,165,0)
+  orange_red = 0xFF4500,               // rgb(255,69,0)
+  orchid = 0xDA70D6,                   // rgb(218,112,214)
+  pale_golden_rod = 0xEEE8AA,          // rgb(238,232,170)
+  pale_green = 0x98FB98,               // rgb(152,251,152)
+  pale_turquoise = 0xAFEEEE,           // rgb(175,238,238)
+  pale_violet_red = 0xDB7093,          // rgb(219,112,147)
+  papaya_whip = 0xFFEFD5,              // rgb(255,239,213)
+  peach_puff = 0xFFDAB9,               // rgb(255,218,185)
+  peru = 0xCD853F,                     // rgb(205,133,63)
+  pink = 0xFFC0CB,                     // rgb(255,192,203)
+  plum = 0xDDA0DD,                     // rgb(221,160,221)
+  powder_blue = 0xB0E0E6,              // rgb(176,224,230)
+  purple = 0x800080,                   // rgb(128,0,128)
+  rebecca_purple = 0x663399,           // rgb(102,51,153)
+  red = 0xFF0000,                      // rgb(255,0,0)
+  rosy_brown = 0xBC8F8F,               // rgb(188,143,143)
+  royal_blue = 0x4169E1,               // rgb(65,105,225)
+  saddle_brown = 0x8B4513,             // rgb(139,69,19)
+  salmon = 0xFA8072,                   // rgb(250,128,114)
+  sandy_brown = 0xF4A460,              // rgb(244,164,96)
+  sea_green = 0x2E8B57,                // rgb(46,139,87)
+  sea_shell = 0xFFF5EE,                // rgb(255,245,238)
+  sienna = 0xA0522D,                   // rgb(160,82,45)
+  silver = 0xC0C0C0,                   // rgb(192,192,192)
+  sky_blue = 0x87CEEB,                 // rgb(135,206,235)
+  slate_blue = 0x6A5ACD,               // rgb(106,90,205)
+  slate_gray = 0x708090,               // rgb(112,128,144)
+  snow = 0xFFFAFA,                     // rgb(255,250,250)
+  spring_green = 0x00FF7F,             // rgb(0,255,127)
+  steel_blue = 0x4682B4,               // rgb(70,130,180)
+  tan = 0xD2B48C,                      // rgb(210,180,140)
+  teal = 0x008080,                     // rgb(0,128,128)
+  thistle = 0xD8BFD8,                  // rgb(216,191,216)
+  tomato = 0xFF6347,                   // rgb(255,99,71)
+  turquoise = 0x40E0D0,                // rgb(64,224,208)
+  violet = 0xEE82EE,                   // rgb(238,130,238)
+  wheat = 0xF5DEB3,                    // rgb(245,222,179)
+  white = 0xFFFFFF,                    // rgb(255,255,255)
+  white_smoke = 0xF5F5F5,              // rgb(245,245,245)
+  yellow = 0xFFFF00,                   // rgb(255,255,0)
+  yellow_green = 0x9ACD32              // rgb(154,205,50)
+};                                     // enum class color
+
+enum class terminal_color : uint8_t {
+  black = 30,
+  red,
+  green,
+  yellow,
+  blue,
+  magenta,
+  cyan,
+  white,
+  bright_black = 90,
+  bright_red,
+  bright_green,
+  bright_yellow,
+  bright_blue,
+  bright_magenta,
+  bright_cyan,
+  bright_white
+};
+
+enum class emphasis : uint8_t {
+  bold = 1,
+  faint = 1 << 1,
+  italic = 1 << 2,
+  underline = 1 << 3,
+  blink = 1 << 4,
+  reverse = 1 << 5,
+  conceal = 1 << 6,
+  strikethrough = 1 << 7,
+};
+
+// rgb is a struct for red, green and blue colors.
+// Using the name "rgb" makes some editors show the color in a tooltip.
+struct rgb {
+  FMT_CONSTEXPR rgb() : r(0), g(0), b(0) {}
+  FMT_CONSTEXPR rgb(uint8_t r_, uint8_t g_, uint8_t b_) : r(r_), g(g_), b(b_) {}
+  FMT_CONSTEXPR rgb(uint32_t hex)
+      : r((hex >> 16) & 0xFF), g((hex >> 8) & 0xFF), b(hex & 0xFF) {}
+  FMT_CONSTEXPR rgb(color hex)
+      : r((uint32_t(hex) >> 16) & 0xFF),
+        g((uint32_t(hex) >> 8) & 0xFF),
+        b(uint32_t(hex) & 0xFF) {}
+  uint8_t r;
+  uint8_t g;
+  uint8_t b;
+};
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+// color is a struct of either a rgb color or a terminal color.
+struct color_type {
+  FMT_CONSTEXPR color_type() FMT_NOEXCEPT : is_rgb(), value{} {}
+  FMT_CONSTEXPR color_type(color rgb_color) FMT_NOEXCEPT : is_rgb(true),
+                                                           value{} {
+    value.rgb_color = static_cast<uint32_t>(rgb_color);
+  }
+  FMT_CONSTEXPR color_type(rgb rgb_color) FMT_NOEXCEPT : is_rgb(true), value{} {
+    value.rgb_color = (static_cast<uint32_t>(rgb_color.r) << 16) |
+                      (static_cast<uint32_t>(rgb_color.g) << 8) | rgb_color.b;
+  }
+  FMT_CONSTEXPR color_type(terminal_color term_color) FMT_NOEXCEPT : is_rgb(),
+                                                                     value{} {
+    value.term_color = static_cast<uint8_t>(term_color);
+  }
+  bool is_rgb;
+  union color_union {
+    uint8_t term_color;
+    uint32_t rgb_color;
+  } value;
+};
+
+FMT_END_DETAIL_NAMESPACE
+
+/** A text style consisting of foreground and background colors and emphasis. */
+class text_style {
+ public:
+  FMT_CONSTEXPR text_style(emphasis em = emphasis()) FMT_NOEXCEPT
+      : set_foreground_color(),
+        set_background_color(),
+        ems(em) {}
+
+  FMT_CONSTEXPR text_style& operator|=(const text_style& rhs) {
+    if (!set_foreground_color) {
+      set_foreground_color = rhs.set_foreground_color;
+      foreground_color = rhs.foreground_color;
+    } else if (rhs.set_foreground_color) {
+      if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb)
+        FMT_THROW(format_error("can't OR a terminal color"));
+      foreground_color.value.rgb_color |= rhs.foreground_color.value.rgb_color;
+    }
+
+    if (!set_background_color) {
+      set_background_color = rhs.set_background_color;
+      background_color = rhs.background_color;
+    } else if (rhs.set_background_color) {
+      if (!background_color.is_rgb || !rhs.background_color.is_rgb)
+        FMT_THROW(format_error("can't OR a terminal color"));
+      background_color.value.rgb_color |= rhs.background_color.value.rgb_color;
+    }
+
+    ems = static_cast<emphasis>(static_cast<uint8_t>(ems) |
+                                static_cast<uint8_t>(rhs.ems));
+    return *this;
+  }
+
+  friend FMT_CONSTEXPR text_style operator|(text_style lhs,
+                                            const text_style& rhs) {
+    return lhs |= rhs;
+  }
+
+  FMT_DEPRECATED_NONMSVC FMT_CONSTEXPR text_style& operator&=(
+      const text_style& rhs) {
+    return and_assign(rhs);
+  }
+
+  FMT_DEPRECATED_NONMSVC friend FMT_CONSTEXPR text_style
+  operator&(text_style lhs, const text_style& rhs) {
+    return lhs.and_assign(rhs);
+  }
+
+  FMT_CONSTEXPR bool has_foreground() const FMT_NOEXCEPT {
+    return set_foreground_color;
+  }
+  FMT_CONSTEXPR bool has_background() const FMT_NOEXCEPT {
+    return set_background_color;
+  }
+  FMT_CONSTEXPR bool has_emphasis() const FMT_NOEXCEPT {
+    return static_cast<uint8_t>(ems) != 0;
+  }
+  FMT_CONSTEXPR detail::color_type get_foreground() const FMT_NOEXCEPT {
+    FMT_ASSERT(has_foreground(), "no foreground specified for this style");
+    return foreground_color;
+  }
+  FMT_CONSTEXPR detail::color_type get_background() const FMT_NOEXCEPT {
+    FMT_ASSERT(has_background(), "no background specified for this style");
+    return background_color;
+  }
+  FMT_CONSTEXPR emphasis get_emphasis() const FMT_NOEXCEPT {
+    FMT_ASSERT(has_emphasis(), "no emphasis specified for this style");
+    return ems;
+  }
+
+ private:
+  FMT_CONSTEXPR text_style(bool is_foreground,
+                           detail::color_type text_color) FMT_NOEXCEPT
+      : set_foreground_color(),
+        set_background_color(),
+        ems() {
+    if (is_foreground) {
+      foreground_color = text_color;
+      set_foreground_color = true;
+    } else {
+      background_color = text_color;
+      set_background_color = true;
+    }
+  }
+
+  // DEPRECATED!
+  FMT_CONSTEXPR text_style& and_assign(const text_style& rhs) {
+    if (!set_foreground_color) {
+      set_foreground_color = rhs.set_foreground_color;
+      foreground_color = rhs.foreground_color;
+    } else if (rhs.set_foreground_color) {
+      if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb)
+        FMT_THROW(format_error("can't AND a terminal color"));
+      foreground_color.value.rgb_color &= rhs.foreground_color.value.rgb_color;
+    }
+
+    if (!set_background_color) {
+      set_background_color = rhs.set_background_color;
+      background_color = rhs.background_color;
+    } else if (rhs.set_background_color) {
+      if (!background_color.is_rgb || !rhs.background_color.is_rgb)
+        FMT_THROW(format_error("can't AND a terminal color"));
+      background_color.value.rgb_color &= rhs.background_color.value.rgb_color;
+    }
+
+    ems = static_cast<emphasis>(static_cast<uint8_t>(ems) &
+                                static_cast<uint8_t>(rhs.ems));
+    return *this;
+  }
+
+  friend FMT_CONSTEXPR_DECL text_style fg(detail::color_type foreground)
+      FMT_NOEXCEPT;
+
+  friend FMT_CONSTEXPR_DECL text_style bg(detail::color_type background)
+      FMT_NOEXCEPT;
+
+  detail::color_type foreground_color;
+  detail::color_type background_color;
+  bool set_foreground_color;
+  bool set_background_color;
+  emphasis ems;
+};
+
+/** Creates a text style from the foreground (text) color. */
+FMT_CONSTEXPR inline text_style fg(detail::color_type foreground) FMT_NOEXCEPT {
+  return text_style(true, foreground);
+}
+
+/** Creates a text style from the background color. */
+FMT_CONSTEXPR inline text_style bg(detail::color_type background) FMT_NOEXCEPT {
+  return text_style(false, background);
+}
+
+FMT_CONSTEXPR inline text_style operator|(emphasis lhs,
+                                          emphasis rhs) FMT_NOEXCEPT {
+  return text_style(lhs) | rhs;
+}
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+template <typename Char> struct ansi_color_escape {
+  FMT_CONSTEXPR ansi_color_escape(detail::color_type text_color,
+                                  const char* esc) FMT_NOEXCEPT {
+    // If we have a terminal color, we need to output another escape code
+    // sequence.
+    if (!text_color.is_rgb) {
+      bool is_background = esc == string_view("\x1b[48;2;");
+      uint32_t value = text_color.value.term_color;
+      // Background ASCII codes are the same as the foreground ones but with
+      // 10 more.
+      if (is_background) value += 10u;
+
+      size_t index = 0;
+      buffer[index++] = static_cast<Char>('\x1b');
+      buffer[index++] = static_cast<Char>('[');
+
+      if (value >= 100u) {
+        buffer[index++] = static_cast<Char>('1');
+        value %= 100u;
+      }
+      buffer[index++] = static_cast<Char>('0' + value / 10u);
+      buffer[index++] = static_cast<Char>('0' + value % 10u);
+
+      buffer[index++] = static_cast<Char>('m');
+      buffer[index++] = static_cast<Char>('\0');
+      return;
+    }
+
+    for (int i = 0; i < 7; i++) {
+      buffer[i] = static_cast<Char>(esc[i]);
+    }
+    rgb color(text_color.value.rgb_color);
+    to_esc(color.r, buffer + 7, ';');
+    to_esc(color.g, buffer + 11, ';');
+    to_esc(color.b, buffer + 15, 'm');
+    buffer[19] = static_cast<Char>(0);
+  }
+  FMT_CONSTEXPR ansi_color_escape(emphasis em) FMT_NOEXCEPT {
+    uint8_t em_codes[num_emphases] = {};
+    if (has_emphasis(em, emphasis::bold)) em_codes[0] = 1;
+    if (has_emphasis(em, emphasis::faint)) em_codes[1] = 2;
+    if (has_emphasis(em, emphasis::italic)) em_codes[2] = 3;
+    if (has_emphasis(em, emphasis::underline)) em_codes[3] = 4;
+    if (has_emphasis(em, emphasis::blink)) em_codes[4] = 5;
+    if (has_emphasis(em, emphasis::reverse)) em_codes[5] = 7;
+    if (has_emphasis(em, emphasis::conceal)) em_codes[6] = 8;
+    if (has_emphasis(em, emphasis::strikethrough)) em_codes[7] = 9;
+
+    size_t index = 0;
+    for (size_t i = 0; i < num_emphases; ++i) {
+      if (!em_codes[i]) continue;
+      buffer[index++] = static_cast<Char>('\x1b');
+      buffer[index++] = static_cast<Char>('[');
+      buffer[index++] = static_cast<Char>('0' + em_codes[i]);
+      buffer[index++] = static_cast<Char>('m');
+    }
+    buffer[index++] = static_cast<Char>(0);
+  }
+  FMT_CONSTEXPR operator const Char*() const FMT_NOEXCEPT { return buffer; }
+
+  FMT_CONSTEXPR const Char* begin() const FMT_NOEXCEPT { return buffer; }
+  FMT_CONSTEXPR_CHAR_TRAITS const Char* end() const FMT_NOEXCEPT {
+    return buffer + std::char_traits<Char>::length(buffer);
+  }
+
+ private:
+  static constexpr size_t num_emphases = 8;
+  Char buffer[7u + 3u * num_emphases + 1u];
+
+  static FMT_CONSTEXPR void to_esc(uint8_t c, Char* out,
+                                   char delimiter) FMT_NOEXCEPT {
+    out[0] = static_cast<Char>('0' + c / 100);
+    out[1] = static_cast<Char>('0' + c / 10 % 10);
+    out[2] = static_cast<Char>('0' + c % 10);
+    out[3] = static_cast<Char>(delimiter);
+  }
+  static FMT_CONSTEXPR bool has_emphasis(emphasis em,
+                                         emphasis mask) FMT_NOEXCEPT {
+    return static_cast<uint8_t>(em) & static_cast<uint8_t>(mask);
+  }
+};
+
+template <typename Char>
+FMT_CONSTEXPR ansi_color_escape<Char> make_foreground_color(
+    detail::color_type foreground) FMT_NOEXCEPT {
+  return ansi_color_escape<Char>(foreground, "\x1b[38;2;");
+}
+
+template <typename Char>
+FMT_CONSTEXPR ansi_color_escape<Char> make_background_color(
+    detail::color_type background) FMT_NOEXCEPT {
+  return ansi_color_escape<Char>(background, "\x1b[48;2;");
+}
+
+template <typename Char>
+FMT_CONSTEXPR ansi_color_escape<Char> make_emphasis(emphasis em) FMT_NOEXCEPT {
+  return ansi_color_escape<Char>(em);
+}
+
+template <typename Char>
+inline void fputs(const Char* chars, FILE* stream) FMT_NOEXCEPT {
+  std::fputs(chars, stream);
+}
+
+template <>
+inline void fputs<wchar_t>(const wchar_t* chars, FILE* stream) FMT_NOEXCEPT {
+  std::fputws(chars, stream);
+}
+
+template <typename Char> inline void reset_color(FILE* stream) FMT_NOEXCEPT {
+  fputs("\x1b[0m", stream);
+}
+
+template <> inline void reset_color<wchar_t>(FILE* stream) FMT_NOEXCEPT {
+  fputs(L"\x1b[0m", stream);
+}
+
+template <typename Char>
+inline void reset_color(buffer<Char>& buffer) FMT_NOEXCEPT {
+  auto reset_color = string_view("\x1b[0m");
+  buffer.append(reset_color.begin(), reset_color.end());
+}
+
+template <typename Char>
+void vformat_to(buffer<Char>& buf, const text_style& ts,
+                basic_string_view<Char> format_str,
+                basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  bool has_style = false;
+  if (ts.has_emphasis()) {
+    has_style = true;
+    auto emphasis = detail::make_emphasis<Char>(ts.get_emphasis());
+    buf.append(emphasis.begin(), emphasis.end());
+  }
+  if (ts.has_foreground()) {
+    has_style = true;
+    auto foreground = detail::make_foreground_color<Char>(ts.get_foreground());
+    buf.append(foreground.begin(), foreground.end());
+  }
+  if (ts.has_background()) {
+    has_style = true;
+    auto background = detail::make_background_color<Char>(ts.get_background());
+    buf.append(background.begin(), background.end());
+  }
+  detail::vformat_to(buf, format_str, args, {});
+  if (has_style) detail::reset_color<Char>(buf);
+}
+
+FMT_END_DETAIL_NAMESPACE
+
+template <typename S, typename Char = char_t<S>>
+void vprint(std::FILE* f, const text_style& ts, const S& format,
+            basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  basic_memory_buffer<Char> buf;
+  detail::vformat_to(buf, ts, to_string_view(format), args);
+  buf.push_back(Char(0));
+  detail::fputs(buf.data(), f);
+}
+
+/**
+  \rst
+  Formats a string and prints it to the specified file stream using ANSI
+  escape sequences to specify text formatting.
+
+  **Example**::
+
+    fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
+               "Elapsed time: {0:.2f} seconds", 1.23);
+  \endrst
+ */
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_string<S>::value)>
+void print(std::FILE* f, const text_style& ts, const S& format_str,
+           const Args&... args) {
+  vprint(f, ts, format_str,
+         fmt::make_args_checked<Args...>(format_str, args...));
+}
+
+/**
+  \rst
+  Formats a string and prints it to stdout using ANSI escape sequences to
+  specify text formatting.
+
+  **Example**::
+
+    fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
+               "Elapsed time: {0:.2f} seconds", 1.23);
+  \endrst
+ */
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_string<S>::value)>
+void print(const text_style& ts, const S& format_str, const Args&... args) {
+  return print(stdout, ts, format_str, args...);
+}
+
+template <typename S, typename Char = char_t<S>>
+inline std::basic_string<Char> vformat(
+    const text_style& ts, const S& format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  basic_memory_buffer<Char> buf;
+  detail::vformat_to(buf, ts, to_string_view(format_str), args);
+  return fmt::to_string(buf);
+}
+
+/**
+  \rst
+  Formats arguments and returns the result as a string using ANSI
+  escape sequences to specify text formatting.
+
+  **Example**::
+
+    #include <fmt/color.h>
+    std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red),
+                                      "The answer is {}", 42);
+  \endrst
+*/
+template <typename S, typename... Args, typename Char = char_t<S>>
+inline std::basic_string<Char> format(const text_style& ts, const S& format_str,
+                                      const Args&... args) {
+  return fmt::vformat(ts, to_string_view(format_str),
+                      fmt::make_args_checked<Args...>(format_str, args...));
+}
+
+/**
+  Formats a string with the given text_style and writes the output to ``out``.
+ */
+template <typename OutputIt, typename Char,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value)>
+OutputIt vformat_to(
+    OutputIt out, const text_style& ts, basic_string_view<Char> format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  auto&& buf = detail::get_buffer<Char>(out);
+  detail::vformat_to(buf, ts, format_str, args);
+  return detail::get_iterator(buf);
+}
+
+/**
+  \rst
+  Formats arguments with the given text_style, writes the result to the output
+  iterator ``out`` and returns the iterator past the end of the output range.
+
+  **Example**::
+
+    std::vector<char> out;
+    fmt::format_to(std::back_inserter(out),
+                   fmt::emphasis::bold | fg(fmt::color::red), "{}", 42);
+  \endrst
+*/
+template <typename OutputIt, typename S, typename... Args,
+          bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value&&
+              detail::is_string<S>::value>
+inline auto format_to(OutputIt out, const text_style& ts, const S& format_str,
+                      Args&&... args) ->
+    typename std::enable_if<enable, OutputIt>::type {
+  return vformat_to(out, ts, to_string_view(format_str),
+                    fmt::make_args_checked<Args...>(format_str, args...));
+}
+
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_COLOR_H_
diff --git a/3rdparty/fmt/include/fmt/compile.h b/3rdparty/fmt/include/fmt/compile.h
new file mode 100644
index 00000000..1dba3ddb
--- /dev/null
+++ b/3rdparty/fmt/include/fmt/compile.h
@@ -0,0 +1,642 @@
+// Formatting library for C++ - experimental format string compilation
+//
+// Copyright (c) 2012 - present, Victor Zverovich and fmt contributors
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_COMPILE_H_
+#define FMT_COMPILE_H_
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+// An output iterator that counts the number of objects written to it and
+// discards them.
+class counting_iterator {
+ private:
+  size_t count_;
+
+ public:
+  using iterator_category = std::output_iterator_tag;
+  using difference_type = std::ptrdiff_t;
+  using pointer = void;
+  using reference = void;
+  using _Unchecked_type = counting_iterator;  // Mark iterator as checked.
+
+  struct value_type {
+    template <typename T> void operator=(const T&) {}
+  };
+
+  counting_iterator() : count_(0) {}
+
+  size_t count() const { return count_; }
+
+  counting_iterator& operator++() {
+    ++count_;
+    return *this;
+  }
+  counting_iterator operator++(int) {
+    auto it = *this;
+    ++*this;
+    return it;
+  }
+
+  friend counting_iterator operator+(counting_iterator it, difference_type n) {
+    it.count_ += static_cast<size_t>(n);
+    return it;
+  }
+
+  value_type operator*() const { return {}; }
+};
+
+template <typename Char, typename InputIt>
+inline counting_iterator copy_str(InputIt begin, InputIt end,
+                                  counting_iterator it) {
+  return it + (end - begin);
+}
+
+template <typename OutputIt> class truncating_iterator_base {
+ protected:
+  OutputIt out_;
+  size_t limit_;
+  size_t count_ = 0;
+
+  truncating_iterator_base() : out_(), limit_(0) {}
+
+  truncating_iterator_base(OutputIt out, size_t limit)
+      : out_(out), limit_(limit) {}
+
+ public:
+  using iterator_category = std::output_iterator_tag;
+  using value_type = typename std::iterator_traits<OutputIt>::value_type;
+  using difference_type = std::ptrdiff_t;
+  using pointer = void;
+  using reference = void;
+  using _Unchecked_type =
+      truncating_iterator_base;  // Mark iterator as checked.
+
+  OutputIt base() const { return out_; }
+  size_t count() const { return count_; }
+};
+
+// An output iterator that truncates the output and counts the number of objects
+// written to it.
+template <typename OutputIt,
+          typename Enable = typename std::is_void<
+              typename std::iterator_traits<OutputIt>::value_type>::type>
+class truncating_iterator;
+
+template <typename OutputIt>
+class truncating_iterator<OutputIt, std::false_type>
+    : public truncating_iterator_base<OutputIt> {
+  mutable typename truncating_iterator_base<OutputIt>::value_type blackhole_;
+
+ public:
+  using value_type = typename truncating_iterator_base<OutputIt>::value_type;
+
+  truncating_iterator() = default;
+
+  truncating_iterator(OutputIt out, size_t limit)
+      : truncating_iterator_base<OutputIt>(out, limit) {}
+
+  truncating_iterator& operator++() {
+    if (this->count_++ < this->limit_) ++this->out_;
+    return *this;
+  }
+
+  truncating_iterator operator++(int) {
+    auto it = *this;
+    ++*this;
+    return it;
+  }
+
+  value_type& operator*() const {
+    return this->count_ < this->limit_ ? *this->out_ : blackhole_;
+  }
+};
+
+template <typename OutputIt>
+class truncating_iterator<OutputIt, std::true_type>
+    : public truncating_iterator_base<OutputIt> {
+ public:
+  truncating_iterator() = default;
+
+  truncating_iterator(OutputIt out, size_t limit)
+      : truncating_iterator_base<OutputIt>(out, limit) {}
+
+  template <typename T> truncating_iterator& operator=(T val) {
+    if (this->count_++ < this->limit_) *this->out_++ = val;
+    return *this;
+  }
+
+  truncating_iterator& operator++() { return *this; }
+  truncating_iterator& operator++(int) { return *this; }
+  truncating_iterator& operator*() { return *this; }
+};
+
+// A compile-time string which is compiled into fast formatting code.
+class compiled_string {};
+
+template <typename S>
+struct is_compiled_string : std::is_base_of<compiled_string, S> {};
+
+/**
+  \rst
+  Converts a string literal *s* into a format string that will be parsed at
+  compile time and converted into efficient formatting code. Requires C++17
+  ``constexpr if`` compiler support.
+
+  **Example**::
+
+    // Converts 42 into std::string using the most efficient method and no
+    // runtime format string processing.
+    std::string s = fmt::format(FMT_COMPILE("{}"), 42);
+  \endrst
+ */
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+#  define FMT_COMPILE(s) \
+    FMT_STRING_IMPL(s, fmt::detail::compiled_string, explicit)
+#else
+#  define FMT_COMPILE(s) FMT_STRING(s)
+#endif
+
+#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+template <typename Char, size_t N,
+          fmt::detail_exported::fixed_string<Char, N> Str>
+struct udl_compiled_string : compiled_string {
+  using char_type = Char;
+  constexpr operator basic_string_view<char_type>() const {
+    return {Str.data, N - 1};
+  }
+};
+#endif
+
+template <typename T, typename... Tail>
+const T& first(const T& value, const Tail&...) {
+  return value;
+}
+
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+template <typename... Args> struct type_list {};
+
+// Returns a reference to the argument at index N from [first, rest...].
+template <int N, typename T, typename... Args>
+constexpr const auto& get([[maybe_unused]] const T& first,
+                          [[maybe_unused]] const Args&... rest) {
+  static_assert(N < 1 + sizeof...(Args), "index is out of bounds");
+  if constexpr (N == 0)
+    return first;
+  else
+    return detail::get<N - 1>(rest...);
+}
+
+template <typename Char, typename... Args>
+constexpr int get_arg_index_by_name(basic_string_view<Char> name,
+                                    type_list<Args...>) {
+  return get_arg_index_by_name<Args...>(name);
+}
+
+template <int N, typename> struct get_type_impl;
+
+template <int N, typename... Args> struct get_type_impl<N, type_list<Args...>> {
+  using type =
+      remove_cvref_t<decltype(detail::get<N>(std::declval<Args>()...))>;
+};
+
+template <int N, typename T>
+using get_type = typename get_type_impl<N, T>::type;
+
+template <typename T> struct is_compiled_format : std::false_type {};
+
+template <typename Char> struct text {
+  basic_string_view<Char> data;
+  using char_type = Char;
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&...) const {
+    return write<Char>(out, data);
+  }
+};
+
+template <typename Char>
+struct is_compiled_format<text<Char>> : std::true_type {};
+
+template <typename Char>
+constexpr text<Char> make_text(basic_string_view<Char> s, size_t pos,
+                               size_t size) {
+  return {{&s[pos], size}};
+}
+
+template <typename Char> struct code_unit {
+  Char value;
+  using char_type = Char;
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&...) const {
+    return write<Char>(out, value);
+  }
+};
+
+// This ensures that the argument type is convertible to `const T&`.
+template <typename T, int N, typename... Args>
+constexpr const T& get_arg_checked(const Args&... args) {
+  const auto& arg = detail::get<N>(args...);
+  if constexpr (detail::is_named_arg<remove_cvref_t<decltype(arg)>>()) {
+    return arg.value;
+  } else {
+    return arg;
+  }
+}
+
+template <typename Char>
+struct is_compiled_format<code_unit<Char>> : std::true_type {};
+
+// A replacement field that refers to argument N.
+template <typename Char, typename T, int N> struct field {
+  using char_type = Char;
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&... args) const {
+    return write<Char>(out, get_arg_checked<T, N>(args...));
+  }
+};
+
+template <typename Char, typename T, int N>
+struct is_compiled_format<field<Char, T, N>> : std::true_type {};
+
+// A replacement field that refers to argument with name.
+template <typename Char> struct runtime_named_field {
+  using char_type = Char;
+  basic_string_view<Char> name;
+
+  template <typename OutputIt, typename T>
+  constexpr static bool try_format_argument(
+      OutputIt& out,
+      // [[maybe_unused]] due to unused-but-set-parameter warning in GCC 7,8,9
+      [[maybe_unused]] basic_string_view<Char> arg_name, const T& arg) {
+    if constexpr (is_named_arg<typename std::remove_cv<T>::type>::value) {
+      if (arg_name == arg.name) {
+        out = write<Char>(out, arg.value);
+        return true;
+      }
+    }
+    return false;
+  }
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&... args) const {
+    bool found = (try_format_argument(out, name, args) || ...);
+    if (!found) {
+      FMT_THROW(format_error("argument with specified name is not found"));
+    }
+    return out;
+  }
+};
+
+template <typename Char>
+struct is_compiled_format<runtime_named_field<Char>> : std::true_type {};
+
+// A replacement field that refers to argument N and has format specifiers.
+template <typename Char, typename T, int N> struct spec_field {
+  using char_type = Char;
+  formatter<T, Char> fmt;
+
+  template <typename OutputIt, typename... Args>
+  constexpr FMT_INLINE OutputIt format(OutputIt out,
+                                       const Args&... args) const {
+    const auto& vargs =
+        fmt::make_format_args<basic_format_context<OutputIt, Char>>(args...);
+    basic_format_context<OutputIt, Char> ctx(out, vargs);
+    return fmt.format(get_arg_checked<T, N>(args...), ctx);
+  }
+};
+
+template <typename Char, typename T, int N>
+struct is_compiled_format<spec_field<Char, T, N>> : std::true_type {};
+
+template <typename L, typename R> struct concat {
+  L lhs;
+  R rhs;
+  using char_type = typename L::char_type;
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&... args) const {
+    out = lhs.format(out, args...);
+    return rhs.format(out, args...);
+  }
+};
+
+template <typename L, typename R>
+struct is_compiled_format<concat<L, R>> : std::true_type {};
+
+template <typename L, typename R>
+constexpr concat<L, R> make_concat(L lhs, R rhs) {
+  return {lhs, rhs};
+}
+
+struct unknown_format {};
+
+template <typename Char>
+constexpr size_t parse_text(basic_string_view<Char> str, size_t pos) {
+  for (size_t size = str.size(); pos != size; ++pos) {
+    if (str[pos] == '{' || str[pos] == '}') break;
+  }
+  return pos;
+}
+
+template <typename Args, size_t POS, int ID, typename S>
+constexpr auto compile_format_string(S format_str);
+
+template <typename Args, size_t POS, int ID, typename T, typename S>
+constexpr auto parse_tail(T head, S format_str) {
+  if constexpr (POS !=
+                basic_string_view<typename S::char_type>(format_str).size()) {
+    constexpr auto tail = compile_format_string<Args, POS, ID>(format_str);
+    if constexpr (std::is_same<remove_cvref_t<decltype(tail)>,
+                               unknown_format>())
+      return tail;
+    else
+      return make_concat(head, tail);
+  } else {
+    return head;
+  }
+}
+
+template <typename T, typename Char> struct parse_specs_result {
+  formatter<T, Char> fmt;
+  size_t end;
+  int next_arg_id;
+};
+
+constexpr int manual_indexing_id = -1;
+
+template <typename T, typename Char>
+constexpr parse_specs_result<T, Char> parse_specs(basic_string_view<Char> str,
+                                                  size_t pos, int next_arg_id) {
+  str.remove_prefix(pos);
+  auto ctx = basic_format_parse_context<Char>(str, {}, next_arg_id);
+  auto f = formatter<T, Char>();
+  auto end = f.parse(ctx);
+  return {f, pos + fmt::detail::to_unsigned(end - str.data()) + 1,
+          next_arg_id == 0 ? manual_indexing_id : ctx.next_arg_id()};
+}
+
+template <typename Char> struct arg_id_handler {
+  arg_ref<Char> arg_id;
+
+  constexpr int operator()() {
+    FMT_ASSERT(false, "handler cannot be used with automatic indexing");
+    return 0;
+  }
+  constexpr int operator()(int id) {
+    arg_id = arg_ref<Char>(id);
+    return 0;
+  }
+  constexpr int operator()(basic_string_view<Char> id) {
+    arg_id = arg_ref<Char>(id);
+    return 0;
+  }
+
+  constexpr void on_error(const char* message) {
+    FMT_THROW(format_error(message));
+  }
+};
+
+template <typename Char> struct parse_arg_id_result {
+  arg_ref<Char> arg_id;
+  const Char* arg_id_end;
+};
+
+template <int ID, typename Char>
+constexpr auto parse_arg_id(const Char* begin, const Char* end) {
+  auto handler = arg_id_handler<Char>{arg_ref<Char>{}};
+  auto arg_id_end = parse_arg_id(begin, end, handler);
+  return parse_arg_id_result<Char>{handler.arg_id, arg_id_end};
+}
+
+template <typename T, typename Enable = void> struct field_type {
+  using type = remove_cvref_t<T>;
+};
+
+template <typename T>
+struct field_type<T, enable_if_t<detail::is_named_arg<T>::value>> {
+  using type = remove_cvref_t<decltype(T::value)>;
+};
+
+template <typename T, typename Args, size_t END_POS, int ARG_INDEX, int NEXT_ID,
+          typename S>
+constexpr auto parse_replacement_field_then_tail(S format_str) {
+  using char_type = typename S::char_type;
+  constexpr auto str = basic_string_view<char_type>(format_str);
+  constexpr char_type c = END_POS != str.size() ? str[END_POS] : char_type();
+  if constexpr (c == '}') {
+    return parse_tail<Args, END_POS + 1, NEXT_ID>(
+        field<char_type, typename field_type<T>::type, ARG_INDEX>(),
+        format_str);
+  } else if constexpr (c == ':') {
+    constexpr auto result = parse_specs<typename field_type<T>::type>(
+        str, END_POS + 1, NEXT_ID == manual_indexing_id ? 0 : NEXT_ID);
+    return parse_tail<Args, result.end, result.next_arg_id>(
+        spec_field<char_type, typename field_type<T>::type, ARG_INDEX>{
+            result.fmt},
+        format_str);
+  }
+}
+
+// Compiles a non-empty format string and returns the compiled representation
+// or unknown_format() on unrecognized input.
+template <typename Args, size_t POS, int ID, typename S>
+constexpr auto compile_format_string(S format_str) {
+  using char_type = typename S::char_type;
+  constexpr auto str = basic_string_view<char_type>(format_str);
+  if constexpr (str[POS] == '{') {
+    if constexpr (POS + 1 == str.size())
+      FMT_THROW(format_error("unmatched '{' in format string"));
+    if constexpr (str[POS + 1] == '{') {
+      return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
+    } else if constexpr (str[POS + 1] == '}' || str[POS + 1] == ':') {
+      static_assert(ID != manual_indexing_id,
+                    "cannot switch from manual to automatic argument indexing");
+      constexpr auto next_id =
+          ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
+      return parse_replacement_field_then_tail<get_type<ID, Args>, Args,
+                                               POS + 1, ID, next_id>(
+          format_str);
+    } else {
+      constexpr auto arg_id_result =
+          parse_arg_id<ID>(str.data() + POS + 1, str.data() + str.size());
+      constexpr auto arg_id_end_pos = arg_id_result.arg_id_end - str.data();
+      constexpr char_type c =
+          arg_id_end_pos != str.size() ? str[arg_id_end_pos] : char_type();
+      static_assert(c == '}' || c == ':', "missing '}' in format string");
+      if constexpr (arg_id_result.arg_id.kind == arg_id_kind::index) {
+        static_assert(
+            ID == manual_indexing_id || ID == 0,
+            "cannot switch from automatic to manual argument indexing");
+        constexpr auto arg_index = arg_id_result.arg_id.val.index;
+        return parse_replacement_field_then_tail<get_type<arg_index, Args>,
+                                                 Args, arg_id_end_pos,
+                                                 arg_index, manual_indexing_id>(
+            format_str);
+      } else if constexpr (arg_id_result.arg_id.kind == arg_id_kind::name) {
+        constexpr auto arg_index =
+            get_arg_index_by_name(arg_id_result.arg_id.val.name, Args{});
+        if constexpr (arg_index != invalid_arg_index) {
+          constexpr auto next_id =
+              ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
+          return parse_replacement_field_then_tail<
+              decltype(get_type<arg_index, Args>::value), Args, arg_id_end_pos,
+              arg_index, next_id>(format_str);
+        } else {
+          if constexpr (c == '}') {
+            return parse_tail<Args, arg_id_end_pos + 1, ID>(
+                runtime_named_field<char_type>{arg_id_result.arg_id.val.name},
+                format_str);
+          } else if constexpr (c == ':') {
+            return unknown_format();  // no type info for specs parsing
+          }
+        }
+      }
+    }
+  } else if constexpr (str[POS] == '}') {
+    if constexpr (POS + 1 == str.size())
+      FMT_THROW(format_error("unmatched '}' in format string"));
+    return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
+  } else {
+    constexpr auto end = parse_text(str, POS + 1);
+    if constexpr (end - POS > 1) {
+      return parse_tail<Args, end, ID>(make_text(str, POS, end - POS),
+                                       format_str);
+    } else {
+      return parse_tail<Args, end, ID>(code_unit<char_type>{str[POS]},
+                                       format_str);
+    }
+  }
+}
+
+template <typename... Args, typename S,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+constexpr auto compile(S format_str) {
+  constexpr auto str = basic_string_view<typename S::char_type>(format_str);
+  if constexpr (str.size() == 0) {
+    return detail::make_text(str, 0, 0);
+  } else {
+    constexpr auto result =
+        detail::compile_format_string<detail::type_list<Args...>, 0, 0>(
+            format_str);
+    return result;
+  }
+}
+#endif  // defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+}  // namespace detail
+
+FMT_MODULE_EXPORT_BEGIN
+
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+
+template <typename CompiledFormat, typename... Args,
+          typename Char = typename CompiledFormat::char_type,
+          FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
+FMT_INLINE std::basic_string<Char> format(const CompiledFormat& cf,
+                                          const Args&... args) {
+  auto s = std::basic_string<Char>();
+  cf.format(std::back_inserter(s), args...);
+  return s;
+}
+
+template <typename OutputIt, typename CompiledFormat, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
+constexpr FMT_INLINE OutputIt format_to(OutputIt out, const CompiledFormat& cf,
+                                        const Args&... args) {
+  return cf.format(out, args...);
+}
+
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
+                                                           Args&&... args) {
+  if constexpr (std::is_same<typename S::char_type, char>::value) {
+    constexpr auto str = basic_string_view<typename S::char_type>(S());
+    if constexpr (str.size() == 2 && str[0] == '{' && str[1] == '}') {
+      const auto& first = detail::first(args...);
+      if constexpr (detail::is_named_arg<
+                        remove_cvref_t<decltype(first)>>::value) {
+        return fmt::to_string(first.value);
+      } else {
+        return fmt::to_string(first);
+      }
+    }
+  }
+  constexpr auto compiled = detail::compile<Args...>(S());
+  if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
+                             detail::unknown_format>()) {
+    return format(static_cast<basic_string_view<typename S::char_type>>(S()),
+                  std::forward<Args>(args)...);
+  } else {
+    return format(compiled, std::forward<Args>(args)...);
+  }
+}
+
+template <typename OutputIt, typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+FMT_CONSTEXPR OutputIt format_to(OutputIt out, const S&, Args&&... args) {
+  constexpr auto compiled = detail::compile<Args...>(S());
+  if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
+                             detail::unknown_format>()) {
+    return format_to(out,
+                     static_cast<basic_string_view<typename S::char_type>>(S()),
+                     std::forward<Args>(args)...);
+  } else {
+    return format_to(out, compiled, std::forward<Args>(args)...);
+  }
+}
+#endif
+
+template <typename OutputIt, typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+format_to_n_result<OutputIt> format_to_n(OutputIt out, size_t n,
+                                         const S& format_str, Args&&... args) {
+  auto it = format_to(detail::truncating_iterator<OutputIt>(out, n), format_str,
+                      std::forward<Args>(args)...);
+  return {it.base(), it.count()};
+}
+
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+size_t formatted_size(const S& format_str, const Args&... args) {
+  return format_to(detail::counting_iterator(), format_str, args...).count();
+}
+
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+void print(std::FILE* f, const S& format_str, const Args&... args) {
+  memory_buffer buffer;
+  format_to(std::back_inserter(buffer), format_str, args...);
+  detail::print(f, {buffer.data(), buffer.size()});
+}
+
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+void print(const S& format_str, const Args&... args) {
+  print(stdout, format_str, args...);
+}
+
+#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+inline namespace literals {
+template <detail_exported::fixed_string Str>
+constexpr detail::udl_compiled_string<
+    remove_cvref_t<decltype(Str.data[0])>,
+    sizeof(Str.data) / sizeof(decltype(Str.data[0])), Str>
+operator""_cf() {
+  return {};
+}
+}  // namespace literals
+#endif
+
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_COMPILE_H_
diff --git a/3rdparty/fmt/include/fmt/core.h b/3rdparty/fmt/include/fmt/core.h
new file mode 100644
index 00000000..92a7aa1d
--- /dev/null
+++ b/3rdparty/fmt/include/fmt/core.h
@@ -0,0 +1,3236 @@
+// Formatting library for C++ - the core API for char/UTF-8
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_CORE_H_
+#define FMT_CORE_H_
+
+#include <cstddef>  // std::byte
+#include <cstdio>   // std::FILE
+#include <cstring>
+#include <iterator>
+#include <limits>
+#include <string>
+#include <type_traits>
+
+// The fmt library version in the form major * 10000 + minor * 100 + patch.
+#define FMT_VERSION 80101
+
+#if defined(__clang__) && !defined(__ibmxl__)
+#  define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
+#else
+#  define FMT_CLANG_VERSION 0
+#endif
+
+#if defined(__GNUC__) && !defined(__clang__) && !defined(__INTEL_COMPILER) && \
+    !defined(__NVCOMPILER)
+#  define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
+#else
+#  define FMT_GCC_VERSION 0
+#endif
+
+#ifndef FMT_GCC_PRAGMA
+// Workaround _Pragma bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59884.
+#  if FMT_GCC_VERSION >= 504
+#    define FMT_GCC_PRAGMA(arg) _Pragma(arg)
+#  else
+#    define FMT_GCC_PRAGMA(arg)
+#  endif
+#endif
+
+#ifdef __ICL
+#  define FMT_ICC_VERSION __ICL
+#elif defined(__INTEL_COMPILER)
+#  define FMT_ICC_VERSION __INTEL_COMPILER
+#else
+#  define FMT_ICC_VERSION 0
+#endif
+
+#ifdef __NVCC__
+#  define FMT_NVCC __NVCC__
+#else
+#  define FMT_NVCC 0
+#endif
+
+#ifdef _MSC_VER
+#  define FMT_MSC_VER _MSC_VER
+#  define FMT_MSC_WARNING(...) __pragma(warning(__VA_ARGS__))
+#else
+#  define FMT_MSC_VER 0
+#  define FMT_MSC_WARNING(...)
+#endif
+
+#ifdef __has_feature
+#  define FMT_HAS_FEATURE(x) __has_feature(x)
+#else
+#  define FMT_HAS_FEATURE(x) 0
+#endif
+
+#if defined(__has_include) &&                             \
+    (!defined(__INTELLISENSE__) || FMT_MSC_VER > 1900) && \
+    (!FMT_ICC_VERSION || FMT_ICC_VERSION >= 1600)
+#  define FMT_HAS_INCLUDE(x) __has_include(x)
+#else
+#  define FMT_HAS_INCLUDE(x) 0
+#endif
+
+#ifdef __has_cpp_attribute
+#  define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
+#else
+#  define FMT_HAS_CPP_ATTRIBUTE(x) 0
+#endif
+
+#ifdef _MSVC_LANG
+#  define FMT_CPLUSPLUS _MSVC_LANG
+#else
+#  define FMT_CPLUSPLUS __cplusplus
+#endif
+
+#define FMT_HAS_CPP14_ATTRIBUTE(attribute) \
+  (FMT_CPLUSPLUS >= 201402L && FMT_HAS_CPP_ATTRIBUTE(attribute))
+
+#define FMT_HAS_CPP17_ATTRIBUTE(attribute) \
+  (FMT_CPLUSPLUS >= 201703L && FMT_HAS_CPP_ATTRIBUTE(attribute))
+
+// Check if relaxed C++14 constexpr is supported.
+// GCC doesn't allow throw in constexpr until version 6 (bug 67371).
+#ifndef FMT_USE_CONSTEXPR
+#  define FMT_USE_CONSTEXPR                                           \
+    (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VER >= 1912 || \
+     (FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L)) &&           \
+        !FMT_NVCC && !FMT_ICC_VERSION
+#endif
+#if FMT_USE_CONSTEXPR
+#  define FMT_CONSTEXPR constexpr
+#  define FMT_CONSTEXPR_DECL constexpr
+#else
+#  define FMT_CONSTEXPR
+#  define FMT_CONSTEXPR_DECL
+#endif
+
+#if ((__cplusplus >= 202002L) &&                              \
+     (!defined(_GLIBCXX_RELEASE) || _GLIBCXX_RELEASE > 9)) || \
+    (__cplusplus >= 201709L && FMT_GCC_VERSION >= 1002)
+#  define FMT_CONSTEXPR20 constexpr
+#else
+#  define FMT_CONSTEXPR20
+#endif
+
+// Check if constexpr std::char_traits<>::compare,length is supported.
+#if defined(__GLIBCXX__)
+#  if __cplusplus >= 201703L && defined(_GLIBCXX_RELEASE) && \
+      _GLIBCXX_RELEASE >= 7  // GCC 7+ libstdc++ has _GLIBCXX_RELEASE.
+#    define FMT_CONSTEXPR_CHAR_TRAITS constexpr
+#  endif
+#elif defined(_LIBCPP_VERSION) && __cplusplus >= 201703L && \
+    _LIBCPP_VERSION >= 4000
+#  define FMT_CONSTEXPR_CHAR_TRAITS constexpr
+#elif FMT_MSC_VER >= 1914 && _MSVC_LANG >= 201703L
+#  define FMT_CONSTEXPR_CHAR_TRAITS constexpr
+#endif
+#ifndef FMT_CONSTEXPR_CHAR_TRAITS
+#  define FMT_CONSTEXPR_CHAR_TRAITS
+#endif
+
+// Check if exceptions are disabled.
+#ifndef FMT_EXCEPTIONS
+#  if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \
+      FMT_MSC_VER && !_HAS_EXCEPTIONS
+#    define FMT_EXCEPTIONS 0
+#  else
+#    define FMT_EXCEPTIONS 1
+#  endif
+#endif
+
+// Define FMT_USE_NOEXCEPT to make fmt use noexcept (C++11 feature).
+#ifndef FMT_USE_NOEXCEPT
+#  define FMT_USE_NOEXCEPT 0
+#endif
+
+#if FMT_USE_NOEXCEPT || FMT_HAS_FEATURE(cxx_noexcept) || \
+    FMT_GCC_VERSION >= 408 || FMT_MSC_VER >= 1900
+#  define FMT_DETECTED_NOEXCEPT noexcept
+#  define FMT_HAS_CXX11_NOEXCEPT 1
+#else
+#  define FMT_DETECTED_NOEXCEPT throw()
+#  define FMT_HAS_CXX11_NOEXCEPT 0
+#endif
+
+#ifndef FMT_NOEXCEPT
+#  if FMT_EXCEPTIONS || FMT_HAS_CXX11_NOEXCEPT
+#    define FMT_NOEXCEPT FMT_DETECTED_NOEXCEPT
+#  else
+#    define FMT_NOEXCEPT
+#  endif
+#endif
+
+// [[noreturn]] is disabled on MSVC and NVCC because of bogus unreachable code
+// warnings.
+#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VER && \
+    !FMT_NVCC
+#  define FMT_NORETURN [[noreturn]]
+#else
+#  define FMT_NORETURN
+#endif
+
+#if __cplusplus == 201103L || __cplusplus == 201402L
+#  if defined(__INTEL_COMPILER) || defined(__PGI)
+#    define FMT_FALLTHROUGH
+#  elif defined(__clang__)
+#    define FMT_FALLTHROUGH [[clang::fallthrough]]
+#  elif FMT_GCC_VERSION >= 700 && \
+      (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520)
+#    define FMT_FALLTHROUGH [[gnu::fallthrough]]
+#  else
+#    define FMT_FALLTHROUGH
+#  endif
+#elif FMT_HAS_CPP17_ATTRIBUTE(fallthrough)
+#  define FMT_FALLTHROUGH [[fallthrough]]
+#else
+#  define FMT_FALLTHROUGH
+#endif
+
+#ifndef FMT_NODISCARD
+#  if FMT_HAS_CPP17_ATTRIBUTE(nodiscard)
+#    define FMT_NODISCARD [[nodiscard]]
+#  else
+#    define FMT_NODISCARD
+#  endif
+#endif
+
+#ifndef FMT_USE_FLOAT
+#  define FMT_USE_FLOAT 1
+#endif
+#ifndef FMT_USE_DOUBLE
+#  define FMT_USE_DOUBLE 1
+#endif
+#ifndef FMT_USE_LONG_DOUBLE
+#  define FMT_USE_LONG_DOUBLE 1
+#endif
+
+#ifndef FMT_INLINE
+#  if FMT_GCC_VERSION || FMT_CLANG_VERSION
+#    define FMT_INLINE inline __attribute__((always_inline))
+#  else
+#    define FMT_INLINE inline
+#  endif
+#endif
+
+#ifndef FMT_DEPRECATED
+#  if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VER >= 1900
+#    define FMT_DEPRECATED [[deprecated]]
+#  else
+#    if (defined(__GNUC__) && !defined(__LCC__)) || defined(__clang__)
+#      define FMT_DEPRECATED __attribute__((deprecated))
+#    elif FMT_MSC_VER
+#      define FMT_DEPRECATED __declspec(deprecated)
+#    else
+#      define FMT_DEPRECATED /* deprecated */
+#    endif
+#  endif
+#endif
+
+#ifndef FMT_BEGIN_NAMESPACE
+#  define FMT_BEGIN_NAMESPACE \
+    namespace fmt {           \
+    inline namespace v8 {
+#  define FMT_END_NAMESPACE \
+    }                       \
+    }
+#endif
+
+#ifndef FMT_MODULE_EXPORT
+#  define FMT_MODULE_EXPORT
+#  define FMT_MODULE_EXPORT_BEGIN
+#  define FMT_MODULE_EXPORT_END
+#  define FMT_BEGIN_DETAIL_NAMESPACE namespace detail {
+#  define FMT_END_DETAIL_NAMESPACE }
+#endif
+
+#if !defined(FMT_HEADER_ONLY) && defined(_WIN32)
+#  define FMT_CLASS_API FMT_MSC_WARNING(suppress : 4275)
+#  ifdef FMT_EXPORT
+#    define FMT_API __declspec(dllexport)
+#  elif defined(FMT_SHARED)
+#    define FMT_API __declspec(dllimport)
+#  endif
+#else
+#  define FMT_CLASS_API
+#  if defined(FMT_EXPORT) || defined(FMT_SHARED)
+#    if defined(__GNUC__) || defined(__clang__)
+#      define FMT_API __attribute__((visibility("default")))
+#    endif
+#  endif
+#endif
+#ifndef FMT_API
+#  define FMT_API
+#endif
+
+// libc++ supports string_view in pre-c++17.
+#if (FMT_HAS_INCLUDE(<string_view>) &&                       \
+     (__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \
+    (defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
+#  include <string_view>
+#  define FMT_USE_STRING_VIEW
+#elif FMT_HAS_INCLUDE("experimental/string_view") && __cplusplus >= 201402L
+#  include <experimental/string_view>
+#  define FMT_USE_EXPERIMENTAL_STRING_VIEW
+#endif
+
+#ifndef FMT_UNICODE
+#  define FMT_UNICODE !FMT_MSC_VER
+#endif
+
+#ifndef FMT_CONSTEVAL
+#  if ((FMT_GCC_VERSION >= 1000 || FMT_CLANG_VERSION >= 1101) &&      \
+       __cplusplus > 201703L && !defined(__apple_build_version__)) || \
+      (defined(__cpp_consteval) &&                                    \
+       (!FMT_MSC_VER || _MSC_FULL_VER >= 193030704))
+// consteval is broken in MSVC before VS2022 and Apple clang 13.
+#    define FMT_CONSTEVAL consteval
+#    define FMT_HAS_CONSTEVAL
+#  else
+#    define FMT_CONSTEVAL
+#  endif
+#endif
+
+#ifndef FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+#  if defined(__cpp_nontype_template_args) &&                \
+      ((FMT_GCC_VERSION >= 903 && __cplusplus >= 201709L) || \
+       __cpp_nontype_template_args >= 201911L)
+#    define FMT_USE_NONTYPE_TEMPLATE_PARAMETERS 1
+#  else
+#    define FMT_USE_NONTYPE_TEMPLATE_PARAMETERS 0
+#  endif
+#endif
+
+// Enable minimal optimizations for more compact code in debug mode.
+FMT_GCC_PRAGMA("GCC push_options")
+#ifndef __OPTIMIZE__
+FMT_GCC_PRAGMA("GCC optimize(\"Og\")")
+#endif
+
+FMT_BEGIN_NAMESPACE
+FMT_MODULE_EXPORT_BEGIN
+
+// Implementations of enable_if_t and other metafunctions for older systems.
+template <bool B, typename T = void>
+using enable_if_t = typename std::enable_if<B, T>::type;
+template <bool B, typename T, typename F>
+using conditional_t = typename std::conditional<B, T, F>::type;
+template <bool B> using bool_constant = std::integral_constant<bool, B>;
+template <typename T>
+using remove_reference_t = typename std::remove_reference<T>::type;
+template <typename T>
+using remove_const_t = typename std::remove_const<T>::type;
+template <typename T>
+using remove_cvref_t = typename std::remove_cv<remove_reference_t<T>>::type;
+template <typename T> struct type_identity { using type = T; };
+template <typename T> using type_identity_t = typename type_identity<T>::type;
+
+struct monostate {
+  constexpr monostate() {}
+};
+
+// An enable_if helper to be used in template parameters which results in much
+// shorter symbols: https://godbolt.org/z/sWw4vP. Extra parentheses are needed
+// to workaround a bug in MSVC 2019 (see #1140 and #1186).
+#ifdef FMT_DOC
+#  define FMT_ENABLE_IF(...)
+#else
+#  define FMT_ENABLE_IF(...) enable_if_t<(__VA_ARGS__), int> = 0
+#endif
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+// Suppress "unused variable" warnings with the method described in
+// https://herbsutter.com/2009/10/18/mailbag-shutting-up-compiler-warnings/.
+// (void)var does not work on many Intel compilers.
+template <typename... T> FMT_CONSTEXPR void ignore_unused(const T&...) {}
+
+constexpr FMT_INLINE auto is_constant_evaluated(bool default_value = false)
+    FMT_NOEXCEPT -> bool {
+#ifdef __cpp_lib_is_constant_evaluated
+  ignore_unused(default_value);
+  return std::is_constant_evaluated();
+#else
+  return default_value;
+#endif
+}
+
+// A function to suppress "conditional expression is constant" warnings.
+template <typename T> constexpr FMT_INLINE auto const_check(T value) -> T {
+  return value;
+}
+
+FMT_NORETURN FMT_API void assert_fail(const char* file, int line,
+                                      const char* message);
+
+#ifndef FMT_ASSERT
+#  ifdef NDEBUG
+// FMT_ASSERT is not empty to avoid -Werror=empty-body.
+#    define FMT_ASSERT(condition, message) \
+      ::fmt::detail::ignore_unused((condition), (message))
+#  else
+#    define FMT_ASSERT(condition, message)                                    \
+      ((condition) /* void() fails with -Winvalid-constexpr on clang 4.0.1 */ \
+           ? (void)0                                                          \
+           : ::fmt::detail::assert_fail(__FILE__, __LINE__, (message)))
+#  endif
+#endif
+
+#ifdef __cpp_lib_byte
+using byte = std::byte;
+#else
+enum class byte : unsigned char {};
+#endif
+
+#if defined(FMT_USE_STRING_VIEW)
+template <typename Char> using std_string_view = std::basic_string_view<Char>;
+#elif defined(FMT_USE_EXPERIMENTAL_STRING_VIEW)
+template <typename Char>
+using std_string_view = std::experimental::basic_string_view<Char>;
+#else
+template <typename T> struct std_string_view {};
+#endif
+
+#ifdef FMT_USE_INT128
+// Do nothing.
+#elif defined(__SIZEOF_INT128__) && !FMT_NVCC && \
+    !(FMT_CLANG_VERSION && FMT_MSC_VER)
+#  define FMT_USE_INT128 1
+using int128_t = __int128_t;
+using uint128_t = __uint128_t;
+template <typename T> inline auto convert_for_visit(T value) -> T {
+  return value;
+}
+#else
+#  define FMT_USE_INT128 0
+#endif
+#if !FMT_USE_INT128
+enum class int128_t {};
+enum class uint128_t {};
+// Reduce template instantiations.
+template <typename T> inline auto convert_for_visit(T) -> monostate {
+  return {};
+}
+#endif
+
+// Casts a nonnegative integer to unsigned.
+template <typename Int>
+FMT_CONSTEXPR auto to_unsigned(Int value) ->
+    typename std::make_unsigned<Int>::type {
+  FMT_ASSERT(value >= 0, "negative value");
+  return static_cast<typename std::make_unsigned<Int>::type>(value);
+}
+
+FMT_MSC_WARNING(suppress : 4566) constexpr unsigned char micro[] = "\u00B5";
+
+constexpr auto is_utf8() -> bool {
+  // Avoid buggy sign extensions in MSVC's constant evaluation mode.
+  // https://developercommunity.visualstudio.com/t/C-difference-in-behavior-for-unsigned/1233612
+  using uchar = unsigned char;
+  return FMT_UNICODE || (sizeof(micro) == 3 && uchar(micro[0]) == 0xC2 &&
+                         uchar(micro[1]) == 0xB5);
+}
+FMT_END_DETAIL_NAMESPACE
+
+/**
+  An implementation of ``std::basic_string_view`` for pre-C++17. It provides a
+  subset of the API. ``fmt::basic_string_view`` is used for format strings even
+  if ``std::string_view`` is available to prevent issues when a library is
+  compiled with a different ``-std`` option than the client code (which is not
+  recommended).
+ */
+template <typename Char> class basic_string_view {
+ private:
+  const Char* data_;
+  size_t size_;
+
+ public:
+  using value_type = Char;
+  using iterator = const Char*;
+
+  constexpr basic_string_view() FMT_NOEXCEPT : data_(nullptr), size_(0) {}
+
+  /** Constructs a string reference object from a C string and a size. */
+  constexpr basic_string_view(const Char* s, size_t count) FMT_NOEXCEPT
+      : data_(s),
+        size_(count) {}
+
+  /**
+    \rst
+    Constructs a string reference object from a C string computing
+    the size with ``std::char_traits<Char>::length``.
+    \endrst
+   */
+  FMT_CONSTEXPR_CHAR_TRAITS
+  FMT_INLINE
+  basic_string_view(const Char* s)
+      : data_(s),
+        size_(detail::const_check(std::is_same<Char, char>::value &&
+                                  !detail::is_constant_evaluated(true))
+                  ? std::strlen(reinterpret_cast<const char*>(s))
+                  : std::char_traits<Char>::length(s)) {}
+
+  /** Constructs a string reference from a ``std::basic_string`` object. */
+  template <typename Traits, typename Alloc>
+  FMT_CONSTEXPR basic_string_view(
+      const std::basic_string<Char, Traits, Alloc>& s) FMT_NOEXCEPT
+      : data_(s.data()),
+        size_(s.size()) {}
+
+  template <typename S, FMT_ENABLE_IF(std::is_same<
+                                      S, detail::std_string_view<Char>>::value)>
+  FMT_CONSTEXPR basic_string_view(S s) FMT_NOEXCEPT : data_(s.data()),
+                                                      size_(s.size()) {}
+
+  /** Returns a pointer to the string data. */
+  constexpr auto data() const FMT_NOEXCEPT -> const Char* { return data_; }
+
+  /** Returns the string size. */
+  constexpr auto size() const FMT_NOEXCEPT -> size_t { return size_; }
+
+  constexpr auto begin() const FMT_NOEXCEPT -> iterator { return data_; }
+  constexpr auto end() const FMT_NOEXCEPT -> iterator { return data_ + size_; }
+
+  constexpr auto operator[](size_t pos) const FMT_NOEXCEPT -> const Char& {
+    return data_[pos];
+  }
+
+  FMT_CONSTEXPR void remove_prefix(size_t n) FMT_NOEXCEPT {
+    data_ += n;
+    size_ -= n;
+  }
+
+  // Lexicographically compare this string reference to other.
+  FMT_CONSTEXPR_CHAR_TRAITS auto compare(basic_string_view other) const -> int {
+    size_t str_size = size_ < other.size_ ? size_ : other.size_;
+    int result = std::char_traits<Char>::compare(data_, other.data_, str_size);
+    if (result == 0)
+      result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1);
+    return result;
+  }
+
+  FMT_CONSTEXPR_CHAR_TRAITS friend auto operator==(basic_string_view lhs,
+                                                   basic_string_view rhs)
+      -> bool {
+    return lhs.compare(rhs) == 0;
+  }
+  friend auto operator!=(basic_string_view lhs, basic_string_view rhs) -> bool {
+    return lhs.compare(rhs) != 0;
+  }
+  friend auto operator<(basic_string_view lhs, basic_string_view rhs) -> bool {
+    return lhs.compare(rhs) < 0;
+  }
+  friend auto operator<=(basic_string_view lhs, basic_string_view rhs) -> bool {
+    return lhs.compare(rhs) <= 0;
+  }
+  friend auto operator>(basic_string_view lhs, basic_string_view rhs) -> bool {
+    return lhs.compare(rhs) > 0;
+  }
+  friend auto operator>=(basic_string_view lhs, basic_string_view rhs) -> bool {
+    return lhs.compare(rhs) >= 0;
+  }
+};
+
+using string_view = basic_string_view<char>;
+
+/** Specifies if ``T`` is a character type. Can be specialized by users. */
+template <typename T> struct is_char : std::false_type {};
+template <> struct is_char<char> : std::true_type {};
+
+// Returns a string view of `s`.
+template <typename Char, FMT_ENABLE_IF(is_char<Char>::value)>
+FMT_INLINE auto to_string_view(const Char* s) -> basic_string_view<Char> {
+  return s;
+}
+template <typename Char, typename Traits, typename Alloc>
+inline auto to_string_view(const std::basic_string<Char, Traits, Alloc>& s)
+    -> basic_string_view<Char> {
+  return s;
+}
+template <typename Char>
+constexpr auto to_string_view(basic_string_view<Char> s)
+    -> basic_string_view<Char> {
+  return s;
+}
+template <typename Char,
+          FMT_ENABLE_IF(!std::is_empty<detail::std_string_view<Char>>::value)>
+inline auto to_string_view(detail::std_string_view<Char> s)
+    -> basic_string_view<Char> {
+  return s;
+}
+
+// A base class for compile-time strings. It is defined in the fmt namespace to
+// make formatting functions visible via ADL, e.g. format(FMT_STRING("{}"), 42).
+struct compile_string {};
+
+template <typename S>
+struct is_compile_string : std::is_base_of<compile_string, S> {};
+
+template <typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
+constexpr auto to_string_view(const S& s)
+    -> basic_string_view<typename S::char_type> {
+  return basic_string_view<typename S::char_type>(s);
+}
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+void to_string_view(...);
+using fmt::to_string_view;
+
+// Specifies whether S is a string type convertible to fmt::basic_string_view.
+// It should be a constexpr function but MSVC 2017 fails to compile it in
+// enable_if and MSVC 2015 fails to compile it as an alias template.
+template <typename S>
+struct is_string : std::is_class<decltype(to_string_view(std::declval<S>()))> {
+};
+
+template <typename S, typename = void> struct char_t_impl {};
+template <typename S> struct char_t_impl<S, enable_if_t<is_string<S>::value>> {
+  using result = decltype(to_string_view(std::declval<S>()));
+  using type = typename result::value_type;
+};
+
+// Reports a compile-time error if S is not a valid format string.
+template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
+FMT_INLINE void check_format_string(const S&) {
+#ifdef FMT_ENFORCE_COMPILE_STRING
+  static_assert(is_compile_string<S>::value,
+                "FMT_ENFORCE_COMPILE_STRING requires all format strings to use "
+                "FMT_STRING.");
+#endif
+}
+template <typename..., typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
+void check_format_string(S);
+
+FMT_NORETURN FMT_API void throw_format_error(const char* message);
+
+struct error_handler {
+  constexpr error_handler() = default;
+  constexpr error_handler(const error_handler&) = default;
+
+  // This function is intentionally not constexpr to give a compile-time error.
+  FMT_NORETURN FMT_API void on_error(const char* message);
+};
+FMT_END_DETAIL_NAMESPACE
+
+/** String's character type. */
+template <typename S> using char_t = typename detail::char_t_impl<S>::type;
+
+/**
+  \rst
+  Parsing context consisting of a format string range being parsed and an
+  argument counter for automatic indexing.
+  You can use the ``format_parse_context`` type alias for ``char`` instead.
+  \endrst
+ */
+template <typename Char, typename ErrorHandler = detail::error_handler>
+class basic_format_parse_context : private ErrorHandler {
+ private:
+  basic_string_view<Char> format_str_;
+  int next_arg_id_;
+
+ public:
+  using char_type = Char;
+  using iterator = typename basic_string_view<Char>::iterator;
+
+  explicit constexpr basic_format_parse_context(
+      basic_string_view<Char> format_str, ErrorHandler eh = {},
+      int next_arg_id = 0)
+      : ErrorHandler(eh), format_str_(format_str), next_arg_id_(next_arg_id) {}
+
+  /**
+    Returns an iterator to the beginning of the format string range being
+    parsed.
+   */
+  constexpr auto begin() const FMT_NOEXCEPT -> iterator {
+    return format_str_.begin();
+  }
+
+  /**
+    Returns an iterator past the end of the format string range being parsed.
+   */
+  constexpr auto end() const FMT_NOEXCEPT -> iterator {
+    return format_str_.end();
+  }
+
+  /** Advances the begin iterator to ``it``. */
+  FMT_CONSTEXPR void advance_to(iterator it) {
+    format_str_.remove_prefix(detail::to_unsigned(it - begin()));
+  }
+
+  /**
+    Reports an error if using the manual argument indexing; otherwise returns
+    the next argument index and switches to the automatic indexing.
+   */
+  FMT_CONSTEXPR auto next_arg_id() -> int {
+    // Don't check if the argument id is valid to avoid overhead and because it
+    // will be checked during formatting anyway.
+    if (next_arg_id_ >= 0) return next_arg_id_++;
+    on_error("cannot switch from manual to automatic argument indexing");
+    return 0;
+  }
+
+  /**
+    Reports an error if using the automatic argument indexing; otherwise
+    switches to the manual indexing.
+   */
+  FMT_CONSTEXPR void check_arg_id(int) {
+    if (next_arg_id_ > 0)
+      on_error("cannot switch from automatic to manual argument indexing");
+    else
+      next_arg_id_ = -1;
+  }
+
+  FMT_CONSTEXPR void check_arg_id(basic_string_view<Char>) {}
+
+  FMT_CONSTEXPR void on_error(const char* message) {
+    ErrorHandler::on_error(message);
+  }
+
+  constexpr auto error_handler() const -> ErrorHandler { return *this; }
+};
+
+using format_parse_context = basic_format_parse_context<char>;
+
+template <typename Context> class basic_format_arg;
+template <typename Context> class basic_format_args;
+template <typename Context> class dynamic_format_arg_store;
+
+// A formatter for objects of type T.
+template <typename T, typename Char = char, typename Enable = void>
+struct formatter {
+  // A deleted default constructor indicates a disabled formatter.
+  formatter() = delete;
+};
+
+// Specifies if T has an enabled formatter specialization. A type can be
+// formattable even if it doesn't have a formatter e.g. via a conversion.
+template <typename T, typename Context>
+using has_formatter =
+    std::is_constructible<typename Context::template formatter_type<T>>;
+
+// Checks whether T is a container with contiguous storage.
+template <typename T> struct is_contiguous : std::false_type {};
+template <typename Char>
+struct is_contiguous<std::basic_string<Char>> : std::true_type {};
+
+class appender;
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+template <typename Context, typename T>
+constexpr auto has_const_formatter_impl(T*)
+    -> decltype(typename Context::template formatter_type<T>().format(
+                    std::declval<const T&>(), std::declval<Context&>()),
+                true) {
+  return true;
+}
+template <typename Context>
+constexpr auto has_const_formatter_impl(...) -> bool {
+  return false;
+}
+template <typename T, typename Context>
+constexpr auto has_const_formatter() -> bool {
+  return has_const_formatter_impl<Context>(static_cast<T*>(nullptr));
+}
+
+// Extracts a reference to the container from back_insert_iterator.
+template <typename Container>
+inline auto get_container(std::back_insert_iterator<Container> it)
+    -> Container& {
+  using bi_iterator = std::back_insert_iterator<Container>;
+  struct accessor : bi_iterator {
+    accessor(bi_iterator iter) : bi_iterator(iter) {}
+    using bi_iterator::container;
+  };
+  return *accessor(it).container;
+}
+
+template <typename Char, typename InputIt, typename OutputIt>
+FMT_CONSTEXPR auto copy_str(InputIt begin, InputIt end, OutputIt out)
+    -> OutputIt {
+  while (begin != end) *out++ = static_cast<Char>(*begin++);
+  return out;
+}
+
+template <typename Char, typename T, typename U,
+          FMT_ENABLE_IF(
+              std::is_same<remove_const_t<T>, U>::value&& is_char<U>::value)>
+FMT_CONSTEXPR auto copy_str(T* begin, T* end, U* out) -> U* {
+  if (is_constant_evaluated()) return copy_str<Char, T*, U*>(begin, end, out);
+  auto size = to_unsigned(end - begin);
+  memcpy(out, begin, size * sizeof(U));
+  return out + size;
+}
+
+/**
+  \rst
+  A contiguous memory buffer with an optional growing ability. It is an internal
+  class and shouldn't be used directly, only via `~fmt::basic_memory_buffer`.
+  \endrst
+ */
+template <typename T> class buffer {
+ private:
+  T* ptr_;
+  size_t size_;
+  size_t capacity_;
+
+ protected:
+  // Don't initialize ptr_ since it is not accessed to save a few cycles.
+  FMT_MSC_WARNING(suppress : 26495)
+  buffer(size_t sz) FMT_NOEXCEPT : size_(sz), capacity_(sz) {}
+
+  FMT_CONSTEXPR20 buffer(T* p = nullptr, size_t sz = 0,
+                         size_t cap = 0) FMT_NOEXCEPT : ptr_(p),
+                                                        size_(sz),
+                                                        capacity_(cap) {}
+
+  FMT_CONSTEXPR20 ~buffer() = default;
+  buffer(buffer&&) = default;
+
+  /** Sets the buffer data and capacity. */
+  FMT_CONSTEXPR void set(T* buf_data, size_t buf_capacity) FMT_NOEXCEPT {
+    ptr_ = buf_data;
+    capacity_ = buf_capacity;
+  }
+
+  /** Increases the buffer capacity to hold at least *capacity* elements. */
+  virtual FMT_CONSTEXPR20 void grow(size_t capacity) = 0;
+
+ public:
+  using value_type = T;
+  using const_reference = const T&;
+
+  buffer(const buffer&) = delete;
+  void operator=(const buffer&) = delete;
+
+  auto begin() FMT_NOEXCEPT -> T* { return ptr_; }
+  auto end() FMT_NOEXCEPT -> T* { return ptr_ + size_; }
+
+  auto begin() const FMT_NOEXCEPT -> const T* { return ptr_; }
+  auto end() const FMT_NOEXCEPT -> const T* { return ptr_ + size_; }
+
+  /** Returns the size of this buffer. */
+  constexpr auto size() const FMT_NOEXCEPT -> size_t { return size_; }
+
+  /** Returns the capacity of this buffer. */
+  constexpr auto capacity() const FMT_NOEXCEPT -> size_t { return capacity_; }
+
+  /** Returns a pointer to the buffer data. */
+  FMT_CONSTEXPR auto data() FMT_NOEXCEPT -> T* { return ptr_; }
+
+  /** Returns a pointer to the buffer data. */
+  FMT_CONSTEXPR auto data() const FMT_NOEXCEPT -> const T* { return ptr_; }
+
+  /** Clears this buffer. */
+  void clear() { size_ = 0; }
+
+  // Tries resizing the buffer to contain *count* elements. If T is a POD type
+  // the new elements may not be initialized.
+  FMT_CONSTEXPR20 void try_resize(size_t count) {
+    try_reserve(count);
+    size_ = count <= capacity_ ? count : capacity_;
+  }
+
+  // Tries increasing the buffer capacity to *new_capacity*. It can increase the
+  // capacity by a smaller amount than requested but guarantees there is space
+  // for at least one additional element either by increasing the capacity or by
+  // flushing the buffer if it is full.
+  FMT_CONSTEXPR20 void try_reserve(size_t new_capacity) {
+    if (new_capacity > capacity_) grow(new_capacity);
+  }
+
+  FMT_CONSTEXPR20 void push_back(const T& value) {
+    try_reserve(size_ + 1);
+    ptr_[size_++] = value;
+  }
+
+  /** Appends data to the end of the buffer. */
+  template <typename U> void append(const U* begin, const U* end);
+
+  template <typename I> FMT_CONSTEXPR auto operator[](I index) -> T& {
+    return ptr_[index];
+  }
+  template <typename I>
+  FMT_CONSTEXPR auto operator[](I index) const -> const T& {
+    return ptr_[index];
+  }
+};
+
+struct buffer_traits {
+  explicit buffer_traits(size_t) {}
+  auto count() const -> size_t { return 0; }
+  auto limit(size_t size) -> size_t { return size; }
+};
+
+class fixed_buffer_traits {
+ private:
+  size_t count_ = 0;
+  size_t limit_;
+
+ public:
+  explicit fixed_buffer_traits(size_t limit) : limit_(limit) {}
+  auto count() const -> size_t { return count_; }
+  auto limit(size_t size) -> size_t {
+    size_t n = limit_ > count_ ? limit_ - count_ : 0;
+    count_ += size;
+    return size < n ? size : n;
+  }
+};
+
+// A buffer that writes to an output iterator when flushed.
+template <typename OutputIt, typename T, typename Traits = buffer_traits>
+class iterator_buffer final : public Traits, public buffer<T> {
+ private:
+  OutputIt out_;
+  enum { buffer_size = 256 };
+  T data_[buffer_size];
+
+ protected:
+  FMT_CONSTEXPR20 void grow(size_t) override {
+    if (this->size() == buffer_size) flush();
+  }
+
+  void flush() {
+    auto size = this->size();
+    this->clear();
+    out_ = copy_str<T>(data_, data_ + this->limit(size), out_);
+  }
+
+ public:
+  explicit iterator_buffer(OutputIt out, size_t n = buffer_size)
+      : Traits(n), buffer<T>(data_, 0, buffer_size), out_(out) {}
+  iterator_buffer(iterator_buffer&& other)
+      : Traits(other), buffer<T>(data_, 0, buffer_size), out_(other.out_) {}
+  ~iterator_buffer() { flush(); }
+
+  auto out() -> OutputIt {
+    flush();
+    return out_;
+  }
+  auto count() const -> size_t { return Traits::count() + this->size(); }
+};
+
+template <typename T>
+class iterator_buffer<T*, T, fixed_buffer_traits> final
+    : public fixed_buffer_traits,
+      public buffer<T> {
+ private:
+  T* out_;
+  enum { buffer_size = 256 };
+  T data_[buffer_size];
+
+ protected:
+  FMT_CONSTEXPR20 void grow(size_t) override {
+    if (this->size() == this->capacity()) flush();
+  }
+
+  void flush() {
+    size_t n = this->limit(this->size());
+    if (this->data() == out_) {
+      out_ += n;
+      this->set(data_, buffer_size);
+    }
+    this->clear();
+  }
+
+ public:
+  explicit iterator_buffer(T* out, size_t n = buffer_size)
+      : fixed_buffer_traits(n), buffer<T>(out, 0, n), out_(out) {}
+  iterator_buffer(iterator_buffer&& other)
+      : fixed_buffer_traits(other),
+        buffer<T>(std::move(other)),
+        out_(other.out_) {
+    if (this->data() != out_) {
+      this->set(data_, buffer_size);
+      this->clear();
+    }
+  }
+  ~iterator_buffer() { flush(); }
+
+  auto out() -> T* {
+    flush();
+    return out_;
+  }
+  auto count() const -> size_t {
+    return fixed_buffer_traits::count() + this->size();
+  }
+};
+
+template <typename T> class iterator_buffer<T*, T> final : public buffer<T> {
+ protected:
+  FMT_CONSTEXPR20 void grow(size_t) override {}
+
+ public:
+  explicit iterator_buffer(T* out, size_t = 0) : buffer<T>(out, 0, ~size_t()) {}
+
+  auto out() -> T* { return &*this->end(); }
+};
+
+// A buffer that writes to a container with the contiguous storage.
+template <typename Container>
+class iterator_buffer<std::back_insert_iterator<Container>,
+                      enable_if_t<is_contiguous<Container>::value,
+                                  typename Container::value_type>>
+    final : public buffer<typename Container::value_type> {
+ private:
+  Container& container_;
+
+ protected:
+  FMT_CONSTEXPR20 void grow(size_t capacity) override {
+    container_.resize(capacity);
+    this->set(&container_[0], capacity);
+  }
+
+ public:
+  explicit iterator_buffer(Container& c)
+      : buffer<typename Container::value_type>(c.size()), container_(c) {}
+  explicit iterator_buffer(std::back_insert_iterator<Container> out, size_t = 0)
+      : iterator_buffer(get_container(out)) {}
+  auto out() -> std::back_insert_iterator<Container> {
+    return std::back_inserter(container_);
+  }
+};
+
+// A buffer that counts the number of code units written discarding the output.
+template <typename T = char> class counting_buffer final : public buffer<T> {
+ private:
+  enum { buffer_size = 256 };
+  T data_[buffer_size];
+  size_t count_ = 0;
+
+ protected:
+  FMT_CONSTEXPR20 void grow(size_t) override {
+    if (this->size() != buffer_size) return;
+    count_ += this->size();
+    this->clear();
+  }
+
+ public:
+  counting_buffer() : buffer<T>(data_, 0, buffer_size) {}
+
+  auto count() -> size_t { return count_ + this->size(); }
+};
+
+template <typename T>
+using buffer_appender = conditional_t<std::is_same<T, char>::value, appender,
+                                      std::back_insert_iterator<buffer<T>>>;
+
+// Maps an output iterator to a buffer.
+template <typename T, typename OutputIt>
+auto get_buffer(OutputIt out) -> iterator_buffer<OutputIt, T> {
+  return iterator_buffer<OutputIt, T>(out);
+}
+
+template <typename Buffer>
+auto get_iterator(Buffer& buf) -> decltype(buf.out()) {
+  return buf.out();
+}
+template <typename T> auto get_iterator(buffer<T>& buf) -> buffer_appender<T> {
+  return buffer_appender<T>(buf);
+}
+
+template <typename T, typename Char = char, typename Enable = void>
+struct fallback_formatter {
+  fallback_formatter() = delete;
+};
+
+// Specifies if T has an enabled fallback_formatter specialization.
+template <typename T, typename Char>
+using has_fallback_formatter =
+    std::is_constructible<fallback_formatter<T, Char>>;
+
+struct view {};
+
+template <typename Char, typename T> struct named_arg : view {
+  const Char* name;
+  const T& value;
+  named_arg(const Char* n, const T& v) : name(n), value(v) {}
+};
+
+template <typename Char> struct named_arg_info {
+  const Char* name;
+  int id;
+};
+
+template <typename T, typename Char, size_t NUM_ARGS, size_t NUM_NAMED_ARGS>
+struct arg_data {
+  // args_[0].named_args points to named_args_ to avoid bloating format_args.
+  // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
+  T args_[1 + (NUM_ARGS != 0 ? NUM_ARGS : +1)];
+  named_arg_info<Char> named_args_[NUM_NAMED_ARGS];
+
+  template <typename... U>
+  arg_data(const U&... init) : args_{T(named_args_, NUM_NAMED_ARGS), init...} {}
+  arg_data(const arg_data& other) = delete;
+  auto args() const -> const T* { return args_ + 1; }
+  auto named_args() -> named_arg_info<Char>* { return named_args_; }
+};
+
+template <typename T, typename Char, size_t NUM_ARGS>
+struct arg_data<T, Char, NUM_ARGS, 0> {
+  // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
+  T args_[NUM_ARGS != 0 ? NUM_ARGS : +1];
+
+  template <typename... U>
+  FMT_CONSTEXPR FMT_INLINE arg_data(const U&... init) : args_{init...} {}
+  FMT_CONSTEXPR FMT_INLINE auto args() const -> const T* { return args_; }
+  FMT_CONSTEXPR FMT_INLINE auto named_args() -> std::nullptr_t {
+    return nullptr;
+  }
+};
+
+template <typename Char>
+inline void init_named_args(named_arg_info<Char>*, int, int) {}
+
+template <typename T> struct is_named_arg : std::false_type {};
+template <typename T> struct is_statically_named_arg : std::false_type {};
+
+template <typename T, typename Char>
+struct is_named_arg<named_arg<Char, T>> : std::true_type {};
+
+template <typename Char, typename T, typename... Tail,
+          FMT_ENABLE_IF(!is_named_arg<T>::value)>
+void init_named_args(named_arg_info<Char>* named_args, int arg_count,
+                     int named_arg_count, const T&, const Tail&... args) {
+  init_named_args(named_args, arg_count + 1, named_arg_count, args...);
+}
+
+template <typename Char, typename T, typename... Tail,
+          FMT_ENABLE_IF(is_named_arg<T>::value)>
+void init_named_args(named_arg_info<Char>* named_args, int arg_count,
+                     int named_arg_count, const T& arg, const Tail&... args) {
+  named_args[named_arg_count++] = {arg.name, arg_count};
+  init_named_args(named_args, arg_count + 1, named_arg_count, args...);
+}
+
+template <typename... Args>
+FMT_CONSTEXPR FMT_INLINE void init_named_args(std::nullptr_t, int, int,
+                                              const Args&...) {}
+
+template <bool B = false> constexpr auto count() -> size_t { return B ? 1 : 0; }
+template <bool B1, bool B2, bool... Tail> constexpr auto count() -> size_t {
+  return (B1 ? 1 : 0) + count<B2, Tail...>();
+}
+
+template <typename... Args> constexpr auto count_named_args() -> size_t {
+  return count<is_named_arg<Args>::value...>();
+}
+
+template <typename... Args>
+constexpr auto count_statically_named_args() -> size_t {
+  return count<is_statically_named_arg<Args>::value...>();
+}
+
+enum class type {
+  none_type,
+  // Integer types should go first,
+  int_type,
+  uint_type,
+  long_long_type,
+  ulong_long_type,
+  int128_type,
+  uint128_type,
+  bool_type,
+  char_type,
+  last_integer_type = char_type,
+  // followed by floating-point types.
+  float_type,
+  double_type,
+  long_double_type,
+  last_numeric_type = long_double_type,
+  cstring_type,
+  string_type,
+  pointer_type,
+  custom_type
+};
+
+// Maps core type T to the corresponding type enum constant.
+template <typename T, typename Char>
+struct type_constant : std::integral_constant<type, type::custom_type> {};
+
+#define FMT_TYPE_CONSTANT(Type, constant) \
+  template <typename Char>                \
+  struct type_constant<Type, Char>        \
+      : std::integral_constant<type, type::constant> {}
+
+FMT_TYPE_CONSTANT(int, int_type);
+FMT_TYPE_CONSTANT(unsigned, uint_type);
+FMT_TYPE_CONSTANT(long long, long_long_type);
+FMT_TYPE_CONSTANT(unsigned long long, ulong_long_type);
+FMT_TYPE_CONSTANT(int128_t, int128_type);
+FMT_TYPE_CONSTANT(uint128_t, uint128_type);
+FMT_TYPE_CONSTANT(bool, bool_type);
+FMT_TYPE_CONSTANT(Char, char_type);
+FMT_TYPE_CONSTANT(float, float_type);
+FMT_TYPE_CONSTANT(double, double_type);
+FMT_TYPE_CONSTANT(long double, long_double_type);
+FMT_TYPE_CONSTANT(const Char*, cstring_type);
+FMT_TYPE_CONSTANT(basic_string_view<Char>, string_type);
+FMT_TYPE_CONSTANT(const void*, pointer_type);
+
+constexpr bool is_integral_type(type t) {
+  return t > type::none_type && t <= type::last_integer_type;
+}
+
+constexpr bool is_arithmetic_type(type t) {
+  return t > type::none_type && t <= type::last_numeric_type;
+}
+
+struct unformattable {};
+struct unformattable_char : unformattable {};
+struct unformattable_const : unformattable {};
+struct unformattable_pointer : unformattable {};
+
+template <typename Char> struct string_value {
+  const Char* data;
+  size_t size;
+};
+
+template <typename Char> struct named_arg_value {
+  const named_arg_info<Char>* data;
+  size_t size;
+};
+
+template <typename Context> struct custom_value {
+  using parse_context = typename Context::parse_context_type;
+  void* value;
+  void (*format)(void* arg, parse_context& parse_ctx, Context& ctx);
+};
+
+// A formatting argument value.
+template <typename Context> class value {
+ public:
+  using char_type = typename Context::char_type;
+
+  union {
+    monostate no_value;
+    int int_value;
+    unsigned uint_value;
+    long long long_long_value;
+    unsigned long long ulong_long_value;
+    int128_t int128_value;
+    uint128_t uint128_value;
+    bool bool_value;
+    char_type char_value;
+    float float_value;
+    double double_value;
+    long double long_double_value;
+    const void* pointer;
+    string_value<char_type> string;
+    custom_value<Context> custom;
+    named_arg_value<char_type> named_args;
+  };
+
+  constexpr FMT_INLINE value() : no_value() {}
+  constexpr FMT_INLINE value(int val) : int_value(val) {}
+  constexpr FMT_INLINE value(unsigned val) : uint_value(val) {}
+  constexpr FMT_INLINE value(long long val) : long_long_value(val) {}
+  constexpr FMT_INLINE value(unsigned long long val) : ulong_long_value(val) {}
+  FMT_INLINE value(int128_t val) : int128_value(val) {}
+  FMT_INLINE value(uint128_t val) : uint128_value(val) {}
+  constexpr FMT_INLINE value(float val) : float_value(val) {}
+  constexpr FMT_INLINE value(double val) : double_value(val) {}
+  FMT_INLINE value(long double val) : long_double_value(val) {}
+  constexpr FMT_INLINE value(bool val) : bool_value(val) {}
+  constexpr FMT_INLINE value(char_type val) : char_value(val) {}
+  FMT_CONSTEXPR FMT_INLINE value(const char_type* val) {
+    string.data = val;
+    if (is_constant_evaluated()) string.size = {};
+  }
+  FMT_CONSTEXPR FMT_INLINE value(basic_string_view<char_type> val) {
+    string.data = val.data();
+    string.size = val.size();
+  }
+  FMT_INLINE value(const void* val) : pointer(val) {}
+  FMT_INLINE value(const named_arg_info<char_type>* args, size_t size)
+      : named_args{args, size} {}
+
+  template <typename T> FMT_CONSTEXPR FMT_INLINE value(T& val) {
+    using value_type = remove_cvref_t<T>;
+    custom.value = const_cast<value_type*>(&val);
+    // Get the formatter type through the context to allow different contexts
+    // have different extension points, e.g. `formatter<T>` for `format` and
+    // `printf_formatter<T>` for `printf`.
+    custom.format = format_custom_arg<
+        value_type,
+        conditional_t<has_formatter<value_type, Context>::value,
+                      typename Context::template formatter_type<value_type>,
+                      fallback_formatter<value_type, char_type>>>;
+  }
+  value(unformattable);
+  value(unformattable_char);
+  value(unformattable_const);
+  value(unformattable_pointer);
+
+ private:
+  // Formats an argument of a custom type, such as a user-defined class.
+  template <typename T, typename Formatter>
+  static void format_custom_arg(void* arg,
+                                typename Context::parse_context_type& parse_ctx,
+                                Context& ctx) {
+    auto f = Formatter();
+    parse_ctx.advance_to(f.parse(parse_ctx));
+    using qualified_type =
+        conditional_t<has_const_formatter<T, Context>(), const T, T>;
+    ctx.advance_to(f.format(*static_cast<qualified_type*>(arg), ctx));
+  }
+};
+
+template <typename Context, typename T>
+FMT_CONSTEXPR auto make_arg(const T& value) -> basic_format_arg<Context>;
+
+// To minimize the number of types we need to deal with, long is translated
+// either to int or to long long depending on its size.
+enum { long_short = sizeof(long) == sizeof(int) };
+using long_type = conditional_t<long_short, int, long long>;
+using ulong_type = conditional_t<long_short, unsigned, unsigned long long>;
+
+// Maps formatting arguments to core types.
+// arg_mapper reports errors by returning unformattable instead of using
+// static_assert because it's used in the is_formattable trait.
+template <typename Context> struct arg_mapper {
+  using char_type = typename Context::char_type;
+
+  FMT_CONSTEXPR FMT_INLINE auto map(signed char val) -> int { return val; }
+  FMT_CONSTEXPR FMT_INLINE auto map(unsigned char val) -> unsigned {
+    return val;
+  }
+  FMT_CONSTEXPR FMT_INLINE auto map(short val) -> int { return val; }
+  FMT_CONSTEXPR FMT_INLINE auto map(unsigned short val) -> unsigned {
+    return val;
+  }
+  FMT_CONSTEXPR FMT_INLINE auto map(int val) -> int { return val; }
+  FMT_CONSTEXPR FMT_INLINE auto map(unsigned val) -> unsigned { return val; }
+  FMT_CONSTEXPR FMT_INLINE auto map(long val) -> long_type { return val; }
+  FMT_CONSTEXPR FMT_INLINE auto map(unsigned long val) -> ulong_type {
+    return val;
+  }
+  FMT_CONSTEXPR FMT_INLINE auto map(long long val) -> long long { return val; }
+  FMT_CONSTEXPR FMT_INLINE auto map(unsigned long long val)
+      -> unsigned long long {
+    return val;
+  }
+  FMT_CONSTEXPR FMT_INLINE auto map(int128_t val) -> int128_t { return val; }
+  FMT_CONSTEXPR FMT_INLINE auto map(uint128_t val) -> uint128_t { return val; }
+  FMT_CONSTEXPR FMT_INLINE auto map(bool val) -> bool { return val; }
+
+  template <typename T, FMT_ENABLE_IF(std::is_same<T, char>::value ||
+                                      std::is_same<T, char_type>::value)>
+  FMT_CONSTEXPR FMT_INLINE auto map(T val) -> char_type {
+    return val;
+  }
+  template <typename T, enable_if_t<(std::is_same<T, wchar_t>::value ||
+#ifdef __cpp_char8_t
+                                     std::is_same<T, char8_t>::value ||
+#endif
+                                     std::is_same<T, char16_t>::value ||
+                                     std::is_same<T, char32_t>::value) &&
+                                        !std::is_same<T, char_type>::value,
+                                    int> = 0>
+  FMT_CONSTEXPR FMT_INLINE auto map(T) -> unformattable_char {
+    return {};
+  }
+
+  FMT_CONSTEXPR FMT_INLINE auto map(float val) -> float { return val; }
+  FMT_CONSTEXPR FMT_INLINE auto map(double val) -> double { return val; }
+  FMT_CONSTEXPR FMT_INLINE auto map(long double val) -> long double {
+    return val;
+  }
+
+  FMT_CONSTEXPR FMT_INLINE auto map(char_type* val) -> const char_type* {
+    return val;
+  }
+  FMT_CONSTEXPR FMT_INLINE auto map(const char_type* val) -> const char_type* {
+    return val;
+  }
+  template <typename T,
+            FMT_ENABLE_IF(is_string<T>::value && !std::is_pointer<T>::value &&
+                          std::is_same<char_type, char_t<T>>::value)>
+  FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
+      -> basic_string_view<char_type> {
+    return to_string_view(val);
+  }
+  template <typename T,
+            FMT_ENABLE_IF(is_string<T>::value && !std::is_pointer<T>::value &&
+                          !std::is_same<char_type, char_t<T>>::value)>
+  FMT_CONSTEXPR FMT_INLINE auto map(const T&) -> unformattable_char {
+    return {};
+  }
+  template <typename T,
+            FMT_ENABLE_IF(
+                std::is_constructible<basic_string_view<char_type>, T>::value &&
+                !is_string<T>::value && !has_formatter<T, Context>::value &&
+                !has_fallback_formatter<T, char_type>::value)>
+  FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
+      -> basic_string_view<char_type> {
+    return basic_string_view<char_type>(val);
+  }
+  template <
+      typename T,
+      FMT_ENABLE_IF(
+          std::is_constructible<std_string_view<char_type>, T>::value &&
+          !std::is_constructible<basic_string_view<char_type>, T>::value &&
+          !is_string<T>::value && !has_formatter<T, Context>::value &&
+          !has_fallback_formatter<T, char_type>::value)>
+  FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
+      -> basic_string_view<char_type> {
+    return std_string_view<char_type>(val);
+  }
+
+  using cstring_result = conditional_t<std::is_same<char_type, char>::value,
+                                       const char*, unformattable_pointer>;
+
+  FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(const signed char* val)
+      -> cstring_result {
+    return map(reinterpret_cast<const char*>(val));
+  }
+  FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(const unsigned char* val)
+      -> cstring_result {
+    return map(reinterpret_cast<const char*>(val));
+  }
+  FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(signed char* val)
+      -> cstring_result {
+    return map(reinterpret_cast<const char*>(val));
+  }
+  FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(unsigned char* val)
+      -> cstring_result {
+    return map(reinterpret_cast<const char*>(val));
+  }
+
+  FMT_CONSTEXPR FMT_INLINE auto map(void* val) -> const void* { return val; }
+  FMT_CONSTEXPR FMT_INLINE auto map(const void* val) -> const void* {
+    return val;
+  }
+  FMT_CONSTEXPR FMT_INLINE auto map(std::nullptr_t val) -> const void* {
+    return val;
+  }
+
+  // We use SFINAE instead of a const T* parameter to avoid conflicting with
+  // the C array overload.
+  template <
+      typename T,
+      FMT_ENABLE_IF(
+          std::is_member_pointer<T>::value ||
+          std::is_function<typename std::remove_pointer<T>::type>::value ||
+          (std::is_convertible<const T&, const void*>::value &&
+           !std::is_convertible<const T&, const char_type*>::value))>
+  FMT_CONSTEXPR auto map(const T&) -> unformattable_pointer {
+    return {};
+  }
+
+  template <typename T, std::size_t N,
+            FMT_ENABLE_IF(!std::is_same<T, wchar_t>::value)>
+  FMT_CONSTEXPR FMT_INLINE auto map(const T (&values)[N]) -> const T (&)[N] {
+    return values;
+  }
+
+  template <typename T,
+            FMT_ENABLE_IF(
+                std::is_enum<T>::value&& std::is_convertible<T, int>::value &&
+                !has_formatter<T, Context>::value &&
+                !has_fallback_formatter<T, char_type>::value)>
+  FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
+      -> decltype(std::declval<arg_mapper>().map(
+          static_cast<typename std::underlying_type<T>::type>(val))) {
+    return map(static_cast<typename std::underlying_type<T>::type>(val));
+  }
+
+  FMT_CONSTEXPR FMT_INLINE auto map(detail::byte val) -> unsigned {
+    return map(static_cast<unsigned char>(val));
+  }
+
+  template <typename T, typename U = remove_cvref_t<T>>
+  struct formattable
+      : bool_constant<has_const_formatter<U, Context>() ||
+                      !std::is_const<remove_reference_t<T>>::value ||
+                      has_fallback_formatter<U, char_type>::value> {};
+
+#if FMT_MSC_VER != 0 && FMT_MSC_VER < 1910
+  // Workaround a bug in MSVC.
+  template <typename T> FMT_CONSTEXPR FMT_INLINE auto do_map(T&& val) -> T& {
+    return val;
+  }
+#else
+  template <typename T, FMT_ENABLE_IF(formattable<T>::value)>
+  FMT_CONSTEXPR FMT_INLINE auto do_map(T&& val) -> T& {
+    return val;
+  }
+  template <typename T, FMT_ENABLE_IF(!formattable<T>::value)>
+  FMT_CONSTEXPR FMT_INLINE auto do_map(T&&) -> unformattable_const {
+    return {};
+  }
+#endif
+
+  template <typename T, typename U = remove_cvref_t<T>,
+            FMT_ENABLE_IF(!is_string<U>::value && !is_char<U>::value &&
+                          !std::is_array<U>::value &&
+                          (has_formatter<U, Context>::value ||
+                           has_fallback_formatter<U, char_type>::value))>
+  FMT_CONSTEXPR FMT_INLINE auto map(T&& val)
+      -> decltype(this->do_map(std::forward<T>(val))) {
+    return do_map(std::forward<T>(val));
+  }
+
+  template <typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
+  FMT_CONSTEXPR FMT_INLINE auto map(const T& named_arg)
+      -> decltype(std::declval<arg_mapper>().map(named_arg.value)) {
+    return map(named_arg.value);
+  }
+
+  auto map(...) -> unformattable { return {}; }
+};
+
+// A type constant after applying arg_mapper<Context>.
+template <typename T, typename Context>
+using mapped_type_constant =
+    type_constant<decltype(arg_mapper<Context>().map(std::declval<const T&>())),
+                  typename Context::char_type>;
+
+enum { packed_arg_bits = 4 };
+// Maximum number of arguments with packed types.
+enum { max_packed_args = 62 / packed_arg_bits };
+enum : unsigned long long { is_unpacked_bit = 1ULL << 63 };
+enum : unsigned long long { has_named_args_bit = 1ULL << 62 };
+
+FMT_END_DETAIL_NAMESPACE
+
+// An output iterator that appends to a buffer.
+// It is used to reduce symbol sizes for the common case.
+class appender : public std::back_insert_iterator<detail::buffer<char>> {
+  using base = std::back_insert_iterator<detail::buffer<char>>;
+
+  template <typename T>
+  friend auto get_buffer(appender out) -> detail::buffer<char>& {
+    return detail::get_container(out);
+  }
+
+ public:
+  using std::back_insert_iterator<detail::buffer<char>>::back_insert_iterator;
+  appender(base it) FMT_NOEXCEPT : base(it) {}
+  using _Unchecked_type = appender;  // Mark iterator as checked.
+
+  auto operator++() FMT_NOEXCEPT -> appender& { return *this; }
+
+  auto operator++(int) FMT_NOEXCEPT -> appender { return *this; }
+};
+
+// A formatting argument. It is a trivially copyable/constructible type to
+// allow storage in basic_memory_buffer.
+template <typename Context> class basic_format_arg {
+ private:
+  detail::value<Context> value_;
+  detail::type type_;
+
+  template <typename ContextType, typename T>
+  friend FMT_CONSTEXPR auto detail::make_arg(const T& value)
+      -> basic_format_arg<ContextType>;
+
+  template <typename Visitor, typename Ctx>
+  friend FMT_CONSTEXPR auto visit_format_arg(Visitor&& vis,
+                                             const basic_format_arg<Ctx>& arg)
+      -> decltype(vis(0));
+
+  friend class basic_format_args<Context>;
+  friend class dynamic_format_arg_store<Context>;
+
+  using char_type = typename Context::char_type;
+
+  template <typename T, typename Char, size_t NUM_ARGS, size_t NUM_NAMED_ARGS>
+  friend struct detail::arg_data;
+
+  basic_format_arg(const detail::named_arg_info<char_type>* args, size_t size)
+      : value_(args, size) {}
+
+ public:
+  class handle {
+   public:
+    explicit handle(detail::custom_value<Context> custom) : custom_(custom) {}
+
+    void format(typename Context::parse_context_type& parse_ctx,
+                Context& ctx) const {
+      custom_.format(custom_.value, parse_ctx, ctx);
+    }
+
+   private:
+    detail::custom_value<Context> custom_;
+  };
+
+  constexpr basic_format_arg() : type_(detail::type::none_type) {}
+
+  constexpr explicit operator bool() const FMT_NOEXCEPT {
+    return type_ != detail::type::none_type;
+  }
+
+  auto type() const -> detail::type { return type_; }
+
+  auto is_integral() const -> bool { return detail::is_integral_type(type_); }
+  auto is_arithmetic() const -> bool {
+    return detail::is_arithmetic_type(type_);
+  }
+};
+
+/**
+  \rst
+  Visits an argument dispatching to the appropriate visit method based on
+  the argument type. For example, if the argument type is ``double`` then
+  ``vis(value)`` will be called with the value of type ``double``.
+  \endrst
+ */
+template <typename Visitor, typename Context>
+FMT_CONSTEXPR FMT_INLINE auto visit_format_arg(
+    Visitor&& vis, const basic_format_arg<Context>& arg) -> decltype(vis(0)) {
+  switch (arg.type_) {
+  case detail::type::none_type:
+    break;
+  case detail::type::int_type:
+    return vis(arg.value_.int_value);
+  case detail::type::uint_type:
+    return vis(arg.value_.uint_value);
+  case detail::type::long_long_type:
+    return vis(arg.value_.long_long_value);
+  case detail::type::ulong_long_type:
+    return vis(arg.value_.ulong_long_value);
+  case detail::type::int128_type:
+    return vis(detail::convert_for_visit(arg.value_.int128_value));
+  case detail::type::uint128_type:
+    return vis(detail::convert_for_visit(arg.value_.uint128_value));
+  case detail::type::bool_type:
+    return vis(arg.value_.bool_value);
+  case detail::type::char_type:
+    return vis(arg.value_.char_value);
+  case detail::type::float_type:
+    return vis(arg.value_.float_value);
+  case detail::type::double_type:
+    return vis(arg.value_.double_value);
+  case detail::type::long_double_type:
+    return vis(arg.value_.long_double_value);
+  case detail::type::cstring_type:
+    return vis(arg.value_.string.data);
+  case detail::type::string_type:
+    using sv = basic_string_view<typename Context::char_type>;
+    return vis(sv(arg.value_.string.data, arg.value_.string.size));
+  case detail::type::pointer_type:
+    return vis(arg.value_.pointer);
+  case detail::type::custom_type:
+    return vis(typename basic_format_arg<Context>::handle(arg.value_.custom));
+  }
+  return vis(monostate());
+}
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+template <typename Char, typename InputIt>
+auto copy_str(InputIt begin, InputIt end, appender out) -> appender {
+  get_container(out).append(begin, end);
+  return out;
+}
+
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 500
+// A workaround for gcc 4.8 to make void_t work in a SFINAE context.
+template <typename... Ts> struct void_t_impl { using type = void; };
+template <typename... Ts>
+using void_t = typename detail::void_t_impl<Ts...>::type;
+#else
+template <typename...> using void_t = void;
+#endif
+
+template <typename It, typename T, typename Enable = void>
+struct is_output_iterator : std::false_type {};
+
+template <typename It, typename T>
+struct is_output_iterator<
+    It, T,
+    void_t<typename std::iterator_traits<It>::iterator_category,
+           decltype(*std::declval<It>() = std::declval<T>())>>
+    : std::true_type {};
+
+template <typename OutputIt>
+struct is_back_insert_iterator : std::false_type {};
+template <typename Container>
+struct is_back_insert_iterator<std::back_insert_iterator<Container>>
+    : std::true_type {};
+
+template <typename OutputIt>
+struct is_contiguous_back_insert_iterator : std::false_type {};
+template <typename Container>
+struct is_contiguous_back_insert_iterator<std::back_insert_iterator<Container>>
+    : is_contiguous<Container> {};
+template <>
+struct is_contiguous_back_insert_iterator<appender> : std::true_type {};
+
+// A type-erased reference to an std::locale to avoid heavy <locale> include.
+class locale_ref {
+ private:
+  const void* locale_;  // A type-erased pointer to std::locale.
+
+ public:
+  constexpr locale_ref() : locale_(nullptr) {}
+  template <typename Locale> explicit locale_ref(const Locale& loc);
+
+  explicit operator bool() const FMT_NOEXCEPT { return locale_ != nullptr; }
+
+  template <typename Locale> auto get() const -> Locale;
+};
+
+template <typename> constexpr auto encode_types() -> unsigned long long {
+  return 0;
+}
+
+template <typename Context, typename Arg, typename... Args>
+constexpr auto encode_types() -> unsigned long long {
+  return static_cast<unsigned>(mapped_type_constant<Arg, Context>::value) |
+         (encode_types<Context, Args...>() << packed_arg_bits);
+}
+
+template <typename Context, typename T>
+FMT_CONSTEXPR auto make_arg(const T& value) -> basic_format_arg<Context> {
+  basic_format_arg<Context> arg;
+  arg.type_ = mapped_type_constant<T, Context>::value;
+  arg.value_ = arg_mapper<Context>().map(value);
+  return arg;
+}
+
+// The type template parameter is there to avoid an ODR violation when using
+// a fallback formatter in one translation unit and an implicit conversion in
+// another (not recommended).
+template <bool IS_PACKED, typename Context, type, typename T,
+          FMT_ENABLE_IF(IS_PACKED)>
+FMT_CONSTEXPR FMT_INLINE auto make_arg(T&& val) -> value<Context> {
+  const auto& arg = arg_mapper<Context>().map(std::forward<T>(val));
+
+  constexpr bool formattable_char =
+      !std::is_same<decltype(arg), const unformattable_char&>::value;
+  static_assert(formattable_char, "Mixing character types is disallowed.");
+
+  constexpr bool formattable_const =
+      !std::is_same<decltype(arg), const unformattable_const&>::value;
+  static_assert(formattable_const, "Cannot format a const argument.");
+
+  // Formatting of arbitrary pointers is disallowed. If you want to output
+  // a pointer cast it to "void *" or "const void *". In particular, this
+  // forbids formatting of "[const] volatile char *" which is printed as bool
+  // by iostreams.
+  constexpr bool formattable_pointer =
+      !std::is_same<decltype(arg), const unformattable_pointer&>::value;
+  static_assert(formattable_pointer,
+                "Formatting of non-void pointers is disallowed.");
+
+  constexpr bool formattable =
+      !std::is_same<decltype(arg), const unformattable&>::value;
+  static_assert(
+      formattable,
+      "Cannot format an argument. To make type T formattable provide a "
+      "formatter<T> specialization: https://fmt.dev/latest/api.html#udt");
+  return {arg};
+}
+
+template <bool IS_PACKED, typename Context, type, typename T,
+          FMT_ENABLE_IF(!IS_PACKED)>
+inline auto make_arg(const T& value) -> basic_format_arg<Context> {
+  return make_arg<Context>(value);
+}
+FMT_END_DETAIL_NAMESPACE
+
+// Formatting context.
+template <typename OutputIt, typename Char> class basic_format_context {
+ public:
+  /** The character type for the output. */
+  using char_type = Char;
+
+ private:
+  OutputIt out_;
+  basic_format_args<basic_format_context> args_;
+  detail::locale_ref loc_;
+
+ public:
+  using iterator = OutputIt;
+  using format_arg = basic_format_arg<basic_format_context>;
+  using parse_context_type = basic_format_parse_context<Char>;
+  template <typename T> using formatter_type = formatter<T, char_type>;
+
+  basic_format_context(basic_format_context&&) = default;
+  basic_format_context(const basic_format_context&) = delete;
+  void operator=(const basic_format_context&) = delete;
+  /**
+   Constructs a ``basic_format_context`` object. References to the arguments are
+   stored in the object so make sure they have appropriate lifetimes.
+   */
+  constexpr basic_format_context(
+      OutputIt out, basic_format_args<basic_format_context> ctx_args,
+      detail::locale_ref loc = detail::locale_ref())
+      : out_(out), args_(ctx_args), loc_(loc) {}
+
+  constexpr auto arg(int id) const -> format_arg { return args_.get(id); }
+  FMT_CONSTEXPR auto arg(basic_string_view<char_type> name) -> format_arg {
+    return args_.get(name);
+  }
+  FMT_CONSTEXPR auto arg_id(basic_string_view<char_type> name) -> int {
+    return args_.get_id(name);
+  }
+  auto args() const -> const basic_format_args<basic_format_context>& {
+    return args_;
+  }
+
+  FMT_CONSTEXPR auto error_handler() -> detail::error_handler { return {}; }
+  void on_error(const char* message) { error_handler().on_error(message); }
+
+  // Returns an iterator to the beginning of the output range.
+  FMT_CONSTEXPR auto out() -> iterator { return out_; }
+
+  // Advances the begin iterator to ``it``.
+  void advance_to(iterator it) {
+    if (!detail::is_back_insert_iterator<iterator>()) out_ = it;
+  }
+
+  FMT_CONSTEXPR auto locale() -> detail::locale_ref { return loc_; }
+};
+
+template <typename Char>
+using buffer_context =
+    basic_format_context<detail::buffer_appender<Char>, Char>;
+using format_context = buffer_context<char>;
+
+// Workaround an alias issue: https://stackoverflow.com/q/62767544/471164.
+#define FMT_BUFFER_CONTEXT(Char) \
+  basic_format_context<detail::buffer_appender<Char>, Char>
+
+template <typename T, typename Char = char>
+using is_formattable = bool_constant<
+    !std::is_base_of<detail::unformattable,
+                     decltype(detail::arg_mapper<buffer_context<Char>>().map(
+                         std::declval<T>()))>::value &&
+    !detail::has_fallback_formatter<T, Char>::value>;
+
+/**
+  \rst
+  An array of references to arguments. It can be implicitly converted into
+  `~fmt::basic_format_args` for passing into type-erased formatting functions
+  such as `~fmt::vformat`.
+  \endrst
+ */
+template <typename Context, typename... Args>
+class format_arg_store
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+    // Workaround a GCC template argument substitution bug.
+    : public basic_format_args<Context>
+#endif
+{
+ private:
+  static const size_t num_args = sizeof...(Args);
+  static const size_t num_named_args = detail::count_named_args<Args...>();
+  static const bool is_packed = num_args <= detail::max_packed_args;
+
+  using value_type = conditional_t<is_packed, detail::value<Context>,
+                                   basic_format_arg<Context>>;
+
+  detail::arg_data<value_type, typename Context::char_type, num_args,
+                   num_named_args>
+      data_;
+
+  friend class basic_format_args<Context>;
+
+  static constexpr unsigned long long desc =
+      (is_packed ? detail::encode_types<Context, Args...>()
+                 : detail::is_unpacked_bit | num_args) |
+      (num_named_args != 0
+           ? static_cast<unsigned long long>(detail::has_named_args_bit)
+           : 0);
+
+ public:
+  template <typename... T>
+  FMT_CONSTEXPR FMT_INLINE format_arg_store(T&&... args)
+      :
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+        basic_format_args<Context>(*this),
+#endif
+        data_{detail::make_arg<
+            is_packed, Context,
+            detail::mapped_type_constant<remove_cvref_t<T>, Context>::value>(
+            std::forward<T>(args))...} {
+    detail::init_named_args(data_.named_args(), 0, 0, args...);
+  }
+};
+
+/**
+  \rst
+  Constructs a `~fmt::format_arg_store` object that contains references to
+  arguments and can be implicitly converted to `~fmt::format_args`. `Context`
+  can be omitted in which case it defaults to `~fmt::context`.
+  See `~fmt::arg` for lifetime considerations.
+  \endrst
+ */
+template <typename Context = format_context, typename... Args>
+constexpr auto make_format_args(Args&&... args)
+    -> format_arg_store<Context, remove_cvref_t<Args>...> {
+  return {std::forward<Args>(args)...};
+}
+
+/**
+  \rst
+  Returns a named argument to be used in a formatting function.
+  It should only be used in a call to a formatting function or
+  `dynamic_format_arg_store::push_back`.
+
+  **Example**::
+
+    fmt::print("Elapsed time: {s:.2f} seconds", fmt::arg("s", 1.23));
+  \endrst
+ */
+template <typename Char, typename T>
+inline auto arg(const Char* name, const T& arg) -> detail::named_arg<Char, T> {
+  static_assert(!detail::is_named_arg<T>(), "nested named arguments");
+  return {name, arg};
+}
+
+/**
+  \rst
+  A view of a collection of formatting arguments. To avoid lifetime issues it
+  should only be used as a parameter type in type-erased functions such as
+  ``vformat``::
+
+    void vlog(string_view format_str, format_args args);  // OK
+    format_args args = make_format_args(42);  // Error: dangling reference
+  \endrst
+ */
+template <typename Context> class basic_format_args {
+ public:
+  using size_type = int;
+  using format_arg = basic_format_arg<Context>;
+
+ private:
+  // A descriptor that contains information about formatting arguments.
+  // If the number of arguments is less or equal to max_packed_args then
+  // argument types are passed in the descriptor. This reduces binary code size
+  // per formatting function call.
+  unsigned long long desc_;
+  union {
+    // If is_packed() returns true then argument values are stored in values_;
+    // otherwise they are stored in args_. This is done to improve cache
+    // locality and reduce compiled code size since storing larger objects
+    // may require more code (at least on x86-64) even if the same amount of
+    // data is actually copied to stack. It saves ~10% on the bloat test.
+    const detail::value<Context>* values_;
+    const format_arg* args_;
+  };
+
+  constexpr auto is_packed() const -> bool {
+    return (desc_ & detail::is_unpacked_bit) == 0;
+  }
+  auto has_named_args() const -> bool {
+    return (desc_ & detail::has_named_args_bit) != 0;
+  }
+
+  FMT_CONSTEXPR auto type(int index) const -> detail::type {
+    int shift = index * detail::packed_arg_bits;
+    unsigned int mask = (1 << detail::packed_arg_bits) - 1;
+    return static_cast<detail::type>((desc_ >> shift) & mask);
+  }
+
+  constexpr FMT_INLINE basic_format_args(unsigned long long desc,
+                                         const detail::value<Context>* values)
+      : desc_(desc), values_(values) {}
+  constexpr basic_format_args(unsigned long long desc, const format_arg* args)
+      : desc_(desc), args_(args) {}
+
+ public:
+  constexpr basic_format_args() : desc_(0), args_(nullptr) {}
+
+  /**
+   \rst
+   Constructs a `basic_format_args` object from `~fmt::format_arg_store`.
+   \endrst
+   */
+  template <typename... Args>
+  constexpr FMT_INLINE basic_format_args(
+      const format_arg_store<Context, Args...>& store)
+      : basic_format_args(format_arg_store<Context, Args...>::desc,
+                          store.data_.args()) {}
+
+  /**
+   \rst
+   Constructs a `basic_format_args` object from
+   `~fmt::dynamic_format_arg_store`.
+   \endrst
+   */
+  constexpr FMT_INLINE basic_format_args(
+      const dynamic_format_arg_store<Context>& store)
+      : basic_format_args(store.get_types(), store.data()) {}
+
+  /**
+   \rst
+   Constructs a `basic_format_args` object from a dynamic set of arguments.
+   \endrst
+   */
+  constexpr basic_format_args(const format_arg* args, int count)
+      : basic_format_args(detail::is_unpacked_bit | detail::to_unsigned(count),
+                          args) {}
+
+  /** Returns the argument with the specified id. */
+  FMT_CONSTEXPR auto get(int id) const -> format_arg {
+    format_arg arg;
+    if (!is_packed()) {
+      if (id < max_size()) arg = args_[id];
+      return arg;
+    }
+    if (id >= detail::max_packed_args) return arg;
+    arg.type_ = type(id);
+    if (arg.type_ == detail::type::none_type) return arg;
+    arg.value_ = values_[id];
+    return arg;
+  }
+
+  template <typename Char>
+  auto get(basic_string_view<Char> name) const -> format_arg {
+    int id = get_id(name);
+    return id >= 0 ? get(id) : format_arg();
+  }
+
+  template <typename Char>
+  auto get_id(basic_string_view<Char> name) const -> int {
+    if (!has_named_args()) return -1;
+    const auto& named_args =
+        (is_packed() ? values_[-1] : args_[-1].value_).named_args;
+    for (size_t i = 0; i < named_args.size; ++i) {
+      if (named_args.data[i].name == name) return named_args.data[i].id;
+    }
+    return -1;
+  }
+
+  auto max_size() const -> int {
+    unsigned long long max_packed = detail::max_packed_args;
+    return static_cast<int>(is_packed() ? max_packed
+                                        : desc_ & ~detail::is_unpacked_bit);
+  }
+};
+
+/** An alias to ``basic_format_args<format_context>``. */
+// A separate type would result in shorter symbols but break ABI compatibility
+// between clang and gcc on ARM (#1919).
+using format_args = basic_format_args<format_context>;
+
+// We cannot use enum classes as bit fields because of a gcc bug
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414.
+namespace align {
+enum type { none, left, right, center, numeric };
+}
+using align_t = align::type;
+namespace sign {
+enum type { none, minus, plus, space };
+}
+using sign_t = sign::type;
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+// Workaround an array initialization issue in gcc 4.8.
+template <typename Char> struct fill_t {
+ private:
+  enum { max_size = 4 };
+  Char data_[max_size] = {Char(' '), Char(0), Char(0), Char(0)};
+  unsigned char size_ = 1;
+
+ public:
+  FMT_CONSTEXPR void operator=(basic_string_view<Char> s) {
+    auto size = s.size();
+    if (size > max_size) return throw_format_error("invalid fill");
+    for (size_t i = 0; i < size; ++i) data_[i] = s[i];
+    size_ = static_cast<unsigned char>(size);
+  }
+
+  constexpr auto size() const -> size_t { return size_; }
+  constexpr auto data() const -> const Char* { return data_; }
+
+  FMT_CONSTEXPR auto operator[](size_t index) -> Char& { return data_[index]; }
+  FMT_CONSTEXPR auto operator[](size_t index) const -> const Char& {
+    return data_[index];
+  }
+};
+FMT_END_DETAIL_NAMESPACE
+
+enum class presentation_type : unsigned char {
+  none,
+  // Integer types should go first,
+  dec,             // 'd'
+  oct,             // 'o'
+  hex_lower,       // 'x'
+  hex_upper,       // 'X'
+  bin_lower,       // 'b'
+  bin_upper,       // 'B'
+  hexfloat_lower,  // 'a'
+  hexfloat_upper,  // 'A'
+  exp_lower,       // 'e'
+  exp_upper,       // 'E'
+  fixed_lower,     // 'f'
+  fixed_upper,     // 'F'
+  general_lower,   // 'g'
+  general_upper,   // 'G'
+  chr,             // 'c'
+  string,          // 's'
+  pointer          // 'p'
+};
+
+// Format specifiers for built-in and string types.
+template <typename Char> struct basic_format_specs {
+  int width;
+  int precision;
+  presentation_type type;
+  align_t align : 4;
+  sign_t sign : 3;
+  bool alt : 1;  // Alternate form ('#').
+  bool localized : 1;
+  detail::fill_t<Char> fill;
+
+  constexpr basic_format_specs()
+      : width(0),
+        precision(-1),
+        type(presentation_type::none),
+        align(align::none),
+        sign(sign::none),
+        alt(false),
+        localized(false) {}
+};
+
+using format_specs = basic_format_specs<char>;
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+enum class arg_id_kind { none, index, name };
+
+// An argument reference.
+template <typename Char> struct arg_ref {
+  FMT_CONSTEXPR arg_ref() : kind(arg_id_kind::none), val() {}
+
+  FMT_CONSTEXPR explicit arg_ref(int index)
+      : kind(arg_id_kind::index), val(index) {}
+  FMT_CONSTEXPR explicit arg_ref(basic_string_view<Char> name)
+      : kind(arg_id_kind::name), val(name) {}
+
+  FMT_CONSTEXPR auto operator=(int idx) -> arg_ref& {
+    kind = arg_id_kind::index;
+    val.index = idx;
+    return *this;
+  }
+
+  arg_id_kind kind;
+  union value {
+    FMT_CONSTEXPR value(int id = 0) : index{id} {}
+    FMT_CONSTEXPR value(basic_string_view<Char> n) : name(n) {}
+
+    int index;
+    basic_string_view<Char> name;
+  } val;
+};
+
+// Format specifiers with width and precision resolved at formatting rather
+// than parsing time to allow re-using the same parsed specifiers with
+// different sets of arguments (precompilation of format strings).
+template <typename Char>
+struct dynamic_format_specs : basic_format_specs<Char> {
+  arg_ref<Char> width_ref;
+  arg_ref<Char> precision_ref;
+};
+
+struct auto_id {};
+
+// A format specifier handler that sets fields in basic_format_specs.
+template <typename Char> class specs_setter {
+ protected:
+  basic_format_specs<Char>& specs_;
+
+ public:
+  explicit FMT_CONSTEXPR specs_setter(basic_format_specs<Char>& specs)
+      : specs_(specs) {}
+
+  FMT_CONSTEXPR specs_setter(const specs_setter& other)
+      : specs_(other.specs_) {}
+
+  FMT_CONSTEXPR void on_align(align_t align) { specs_.align = align; }
+  FMT_CONSTEXPR void on_fill(basic_string_view<Char> fill) {
+    specs_.fill = fill;
+  }
+  FMT_CONSTEXPR void on_sign(sign_t s) { specs_.sign = s; }
+  FMT_CONSTEXPR void on_hash() { specs_.alt = true; }
+  FMT_CONSTEXPR void on_localized() { specs_.localized = true; }
+
+  FMT_CONSTEXPR void on_zero() {
+    if (specs_.align == align::none) specs_.align = align::numeric;
+    specs_.fill[0] = Char('0');
+  }
+
+  FMT_CONSTEXPR void on_width(int width) { specs_.width = width; }
+  FMT_CONSTEXPR void on_precision(int precision) {
+    specs_.precision = precision;
+  }
+  FMT_CONSTEXPR void end_precision() {}
+
+  FMT_CONSTEXPR void on_type(presentation_type type) { specs_.type = type; }
+};
+
+// Format spec handler that saves references to arguments representing dynamic
+// width and precision to be resolved at formatting time.
+template <typename ParseContext>
+class dynamic_specs_handler
+    : public specs_setter<typename ParseContext::char_type> {
+ public:
+  using char_type = typename ParseContext::char_type;
+
+  FMT_CONSTEXPR dynamic_specs_handler(dynamic_format_specs<char_type>& specs,
+                                      ParseContext& ctx)
+      : specs_setter<char_type>(specs), specs_(specs), context_(ctx) {}
+
+  FMT_CONSTEXPR dynamic_specs_handler(const dynamic_specs_handler& other)
+      : specs_setter<char_type>(other),
+        specs_(other.specs_),
+        context_(other.context_) {}
+
+  template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
+    specs_.width_ref = make_arg_ref(arg_id);
+  }
+
+  template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
+    specs_.precision_ref = make_arg_ref(arg_id);
+  }
+
+  FMT_CONSTEXPR void on_error(const char* message) {
+    context_.on_error(message);
+  }
+
+ private:
+  dynamic_format_specs<char_type>& specs_;
+  ParseContext& context_;
+
+  using arg_ref_type = arg_ref<char_type>;
+
+  FMT_CONSTEXPR auto make_arg_ref(int arg_id) -> arg_ref_type {
+    context_.check_arg_id(arg_id);
+    return arg_ref_type(arg_id);
+  }
+
+  FMT_CONSTEXPR auto make_arg_ref(auto_id) -> arg_ref_type {
+    return arg_ref_type(context_.next_arg_id());
+  }
+
+  FMT_CONSTEXPR auto make_arg_ref(basic_string_view<char_type> arg_id)
+      -> arg_ref_type {
+    context_.check_arg_id(arg_id);
+    basic_string_view<char_type> format_str(
+        context_.begin(), to_unsigned(context_.end() - context_.begin()));
+    return arg_ref_type(arg_id);
+  }
+};
+
+template <typename Char> constexpr bool is_ascii_letter(Char c) {
+  return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
+}
+
+// Converts a character to ASCII. Returns a number > 127 on conversion failure.
+template <typename Char, FMT_ENABLE_IF(std::is_integral<Char>::value)>
+constexpr auto to_ascii(Char value) -> Char {
+  return value;
+}
+template <typename Char, FMT_ENABLE_IF(std::is_enum<Char>::value)>
+constexpr auto to_ascii(Char value) ->
+    typename std::underlying_type<Char>::type {
+  return value;
+}
+
+template <typename Char>
+FMT_CONSTEXPR auto code_point_length(const Char* begin) -> int {
+  if (const_check(sizeof(Char) != 1)) return 1;
+  auto lengths =
+      "\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\0\0\0\0\0\0\0\0\2\2\2\2\3\3\4";
+  int len = lengths[static_cast<unsigned char>(*begin) >> 3];
+
+  // Compute the pointer to the next character early so that the next
+  // iteration can start working on the next character. Neither Clang
+  // nor GCC figure out this reordering on their own.
+  return len + !len;
+}
+
+// Return the result via the out param to workaround gcc bug 77539.
+template <bool IS_CONSTEXPR, typename T, typename Ptr = const T*>
+FMT_CONSTEXPR auto find(Ptr first, Ptr last, T value, Ptr& out) -> bool {
+  for (out = first; out != last; ++out) {
+    if (*out == value) return true;
+  }
+  return false;
+}
+
+template <>
+inline auto find<false, char>(const char* first, const char* last, char value,
+                              const char*& out) -> bool {
+  out = static_cast<const char*>(
+      std::memchr(first, value, to_unsigned(last - first)));
+  return out != nullptr;
+}
+
+// Parses the range [begin, end) as an unsigned integer. This function assumes
+// that the range is non-empty and the first character is a digit.
+template <typename Char>
+FMT_CONSTEXPR auto parse_nonnegative_int(const Char*& begin, const Char* end,
+                                         int error_value) noexcept -> int {
+  FMT_ASSERT(begin != end && '0' <= *begin && *begin <= '9', "");
+  unsigned value = 0, prev = 0;
+  auto p = begin;
+  do {
+    prev = value;
+    value = value * 10 + unsigned(*p - '0');
+    ++p;
+  } while (p != end && '0' <= *p && *p <= '9');
+  auto num_digits = p - begin;
+  begin = p;
+  if (num_digits <= std::numeric_limits<int>::digits10)
+    return static_cast<int>(value);
+  // Check for overflow.
+  const unsigned max = to_unsigned((std::numeric_limits<int>::max)());
+  return num_digits == std::numeric_limits<int>::digits10 + 1 &&
+                 prev * 10ull + unsigned(p[-1] - '0') <= max
+             ? static_cast<int>(value)
+             : error_value;
+}
+
+// Parses fill and alignment.
+template <typename Char, typename Handler>
+FMT_CONSTEXPR auto parse_align(const Char* begin, const Char* end,
+                               Handler&& handler) -> const Char* {
+  FMT_ASSERT(begin != end, "");
+  auto align = align::none;
+  auto p = begin + code_point_length(begin);
+  if (p >= end) p = begin;
+  for (;;) {
+    switch (to_ascii(*p)) {
+    case '<':
+      align = align::left;
+      break;
+    case '>':
+      align = align::right;
+      break;
+    case '^':
+      align = align::center;
+      break;
+    default:
+      break;
+    }
+    if (align != align::none) {
+      if (p != begin) {
+        auto c = *begin;
+        if (c == '{')
+          return handler.on_error("invalid fill character '{'"), begin;
+        handler.on_fill(basic_string_view<Char>(begin, to_unsigned(p - begin)));
+        begin = p + 1;
+      } else
+        ++begin;
+      handler.on_align(align);
+      break;
+    } else if (p == begin) {
+      break;
+    }
+    p = begin;
+  }
+  return begin;
+}
+
+template <typename Char> FMT_CONSTEXPR bool is_name_start(Char c) {
+  return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c;
+}
+
+template <typename Char, typename IDHandler>
+FMT_CONSTEXPR auto do_parse_arg_id(const Char* begin, const Char* end,
+                                   IDHandler&& handler) -> const Char* {
+  FMT_ASSERT(begin != end, "");
+  Char c = *begin;
+  if (c >= '0' && c <= '9') {
+    int index = 0;
+    if (c != '0')
+      index =
+          parse_nonnegative_int(begin, end, (std::numeric_limits<int>::max)());
+    else
+      ++begin;
+    if (begin == end || (*begin != '}' && *begin != ':'))
+      handler.on_error("invalid format string");
+    else
+      handler(index);
+    return begin;
+  }
+  if (!is_name_start(c)) {
+    handler.on_error("invalid format string");
+    return begin;
+  }
+  auto it = begin;
+  do {
+    ++it;
+  } while (it != end && (is_name_start(c = *it) || ('0' <= c && c <= '9')));
+  handler(basic_string_view<Char>(begin, to_unsigned(it - begin)));
+  return it;
+}
+
+template <typename Char, typename IDHandler>
+FMT_CONSTEXPR FMT_INLINE auto parse_arg_id(const Char* begin, const Char* end,
+                                           IDHandler&& handler) -> const Char* {
+  Char c = *begin;
+  if (c != '}' && c != ':') return do_parse_arg_id(begin, end, handler);
+  handler();
+  return begin;
+}
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR auto parse_width(const Char* begin, const Char* end,
+                               Handler&& handler) -> const Char* {
+  using detail::auto_id;
+  struct width_adapter {
+    Handler& handler;
+
+    FMT_CONSTEXPR void operator()() { handler.on_dynamic_width(auto_id()); }
+    FMT_CONSTEXPR void operator()(int id) { handler.on_dynamic_width(id); }
+    FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
+      handler.on_dynamic_width(id);
+    }
+    FMT_CONSTEXPR void on_error(const char* message) {
+      if (message) handler.on_error(message);
+    }
+  };
+
+  FMT_ASSERT(begin != end, "");
+  if ('0' <= *begin && *begin <= '9') {
+    int width = parse_nonnegative_int(begin, end, -1);
+    if (width != -1)
+      handler.on_width(width);
+    else
+      handler.on_error("number is too big");
+  } else if (*begin == '{') {
+    ++begin;
+    if (begin != end) begin = parse_arg_id(begin, end, width_adapter{handler});
+    if (begin == end || *begin != '}')
+      return handler.on_error("invalid format string"), begin;
+    ++begin;
+  }
+  return begin;
+}
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR auto parse_precision(const Char* begin, const Char* end,
+                                   Handler&& handler) -> const Char* {
+  using detail::auto_id;
+  struct precision_adapter {
+    Handler& handler;
+
+    FMT_CONSTEXPR void operator()() { handler.on_dynamic_precision(auto_id()); }
+    FMT_CONSTEXPR void operator()(int id) { handler.on_dynamic_precision(id); }
+    FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
+      handler.on_dynamic_precision(id);
+    }
+    FMT_CONSTEXPR void on_error(const char* message) {
+      if (message) handler.on_error(message);
+    }
+  };
+
+  ++begin;
+  auto c = begin != end ? *begin : Char();
+  if ('0' <= c && c <= '9') {
+    auto precision = parse_nonnegative_int(begin, end, -1);
+    if (precision != -1)
+      handler.on_precision(precision);
+    else
+      handler.on_error("number is too big");
+  } else if (c == '{') {
+    ++begin;
+    if (begin != end)
+      begin = parse_arg_id(begin, end, precision_adapter{handler});
+    if (begin == end || *begin++ != '}')
+      return handler.on_error("invalid format string"), begin;
+  } else {
+    return handler.on_error("missing precision specifier"), begin;
+  }
+  handler.end_precision();
+  return begin;
+}
+
+template <typename Char>
+FMT_CONSTEXPR auto parse_presentation_type(Char type) -> presentation_type {
+  switch (to_ascii(type)) {
+  case 'd':
+    return presentation_type::dec;
+  case 'o':
+    return presentation_type::oct;
+  case 'x':
+    return presentation_type::hex_lower;
+  case 'X':
+    return presentation_type::hex_upper;
+  case 'b':
+    return presentation_type::bin_lower;
+  case 'B':
+    return presentation_type::bin_upper;
+  case 'a':
+    return presentation_type::hexfloat_lower;
+  case 'A':
+    return presentation_type::hexfloat_upper;
+  case 'e':
+    return presentation_type::exp_lower;
+  case 'E':
+    return presentation_type::exp_upper;
+  case 'f':
+    return presentation_type::fixed_lower;
+  case 'F':
+    return presentation_type::fixed_upper;
+  case 'g':
+    return presentation_type::general_lower;
+  case 'G':
+    return presentation_type::general_upper;
+  case 'c':
+    return presentation_type::chr;
+  case 's':
+    return presentation_type::string;
+  case 'p':
+    return presentation_type::pointer;
+  default:
+    return presentation_type::none;
+  }
+}
+
+// Parses standard format specifiers and sends notifications about parsed
+// components to handler.
+template <typename Char, typename SpecHandler>
+FMT_CONSTEXPR FMT_INLINE auto parse_format_specs(const Char* begin,
+                                                 const Char* end,
+                                                 SpecHandler&& handler)
+    -> const Char* {
+  if (1 < end - begin && begin[1] == '}' && is_ascii_letter(*begin) &&
+      *begin != 'L') {
+    presentation_type type = parse_presentation_type(*begin++);
+    if (type == presentation_type::none)
+      handler.on_error("invalid type specifier");
+    handler.on_type(type);
+    return begin;
+  }
+
+  if (begin == end) return begin;
+
+  begin = parse_align(begin, end, handler);
+  if (begin == end) return begin;
+
+  // Parse sign.
+  switch (to_ascii(*begin)) {
+  case '+':
+    handler.on_sign(sign::plus);
+    ++begin;
+    break;
+  case '-':
+    handler.on_sign(sign::minus);
+    ++begin;
+    break;
+  case ' ':
+    handler.on_sign(sign::space);
+    ++begin;
+    break;
+  default:
+    break;
+  }
+  if (begin == end) return begin;
+
+  if (*begin == '#') {
+    handler.on_hash();
+    if (++begin == end) return begin;
+  }
+
+  // Parse zero flag.
+  if (*begin == '0') {
+    handler.on_zero();
+    if (++begin == end) return begin;
+  }
+
+  begin = parse_width(begin, end, handler);
+  if (begin == end) return begin;
+
+  // Parse precision.
+  if (*begin == '.') {
+    begin = parse_precision(begin, end, handler);
+    if (begin == end) return begin;
+  }
+
+  if (*begin == 'L') {
+    handler.on_localized();
+    ++begin;
+  }
+
+  // Parse type.
+  if (begin != end && *begin != '}') {
+    presentation_type type = parse_presentation_type(*begin++);
+    if (type == presentation_type::none)
+      handler.on_error("invalid type specifier");
+    handler.on_type(type);
+  }
+  return begin;
+}
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR auto parse_replacement_field(const Char* begin, const Char* end,
+                                           Handler&& handler) -> const Char* {
+  struct id_adapter {
+    Handler& handler;
+    int arg_id;
+
+    FMT_CONSTEXPR void operator()() { arg_id = handler.on_arg_id(); }
+    FMT_CONSTEXPR void operator()(int id) { arg_id = handler.on_arg_id(id); }
+    FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
+      arg_id = handler.on_arg_id(id);
+    }
+    FMT_CONSTEXPR void on_error(const char* message) {
+      if (message) handler.on_error(message);
+    }
+  };
+
+  ++begin;
+  if (begin == end) return handler.on_error("invalid format string"), end;
+  if (*begin == '}') {
+    handler.on_replacement_field(handler.on_arg_id(), begin);
+  } else if (*begin == '{') {
+    handler.on_text(begin, begin + 1);
+  } else {
+    auto adapter = id_adapter{handler, 0};
+    begin = parse_arg_id(begin, end, adapter);
+    Char c = begin != end ? *begin : Char();
+    if (c == '}') {
+      handler.on_replacement_field(adapter.arg_id, begin);
+    } else if (c == ':') {
+      begin = handler.on_format_specs(adapter.arg_id, begin + 1, end);
+      if (begin == end || *begin != '}')
+        return handler.on_error("unknown format specifier"), end;
+    } else {
+      return handler.on_error("missing '}' in format string"), end;
+    }
+  }
+  return begin + 1;
+}
+
+template <bool IS_CONSTEXPR, typename Char, typename Handler>
+FMT_CONSTEXPR FMT_INLINE void parse_format_string(
+    basic_string_view<Char> format_str, Handler&& handler) {
+  // Workaround a name-lookup bug in MSVC's modules implementation.
+  using detail::find;
+
+  auto begin = format_str.data();
+  auto end = begin + format_str.size();
+  if (end - begin < 32) {
+    // Use a simple loop instead of memchr for small strings.
+    const Char* p = begin;
+    while (p != end) {
+      auto c = *p++;
+      if (c == '{') {
+        handler.on_text(begin, p - 1);
+        begin = p = parse_replacement_field(p - 1, end, handler);
+      } else if (c == '}') {
+        if (p == end || *p != '}')
+          return handler.on_error("unmatched '}' in format string");
+        handler.on_text(begin, p);
+        begin = ++p;
+      }
+    }
+    handler.on_text(begin, end);
+    return;
+  }
+  struct writer {
+    FMT_CONSTEXPR void operator()(const Char* pbegin, const Char* pend) {
+      if (pbegin == pend) return;
+      for (;;) {
+        const Char* p = nullptr;
+        if (!find<IS_CONSTEXPR>(pbegin, pend, Char('}'), p))
+          return handler_.on_text(pbegin, pend);
+        ++p;
+        if (p == pend || *p != '}')
+          return handler_.on_error("unmatched '}' in format string");
+        handler_.on_text(pbegin, p);
+        pbegin = p + 1;
+      }
+    }
+    Handler& handler_;
+  } write{handler};
+  while (begin != end) {
+    // Doing two passes with memchr (one for '{' and another for '}') is up to
+    // 2.5x faster than the naive one-pass implementation on big format strings.
+    const Char* p = begin;
+    if (*begin != '{' && !find<IS_CONSTEXPR>(begin + 1, end, Char('{'), p))
+      return write(begin, end);
+    write(begin, p);
+    begin = parse_replacement_field(p, end, handler);
+  }
+}
+
+template <typename T, typename ParseContext>
+FMT_CONSTEXPR auto parse_format_specs(ParseContext& ctx)
+    -> decltype(ctx.begin()) {
+  using char_type = typename ParseContext::char_type;
+  using context = buffer_context<char_type>;
+  using mapped_type = conditional_t<
+      mapped_type_constant<T, context>::value != type::custom_type,
+      decltype(arg_mapper<context>().map(std::declval<const T&>())), T>;
+  auto f = conditional_t<has_formatter<mapped_type, context>::value,
+                         formatter<mapped_type, char_type>,
+                         fallback_formatter<T, char_type>>();
+  return f.parse(ctx);
+}
+
+// A parse context with extra argument id checks. It is only used at compile
+// time because adding checks at runtime would introduce substantial overhead
+// and would be redundant since argument ids are checked when arguments are
+// retrieved anyway.
+template <typename Char, typename ErrorHandler = error_handler>
+class compile_parse_context
+    : public basic_format_parse_context<Char, ErrorHandler> {
+ private:
+  int num_args_;
+  using base = basic_format_parse_context<Char, ErrorHandler>;
+
+ public:
+  explicit FMT_CONSTEXPR compile_parse_context(
+      basic_string_view<Char> format_str,
+      int num_args = (std::numeric_limits<int>::max)(), ErrorHandler eh = {})
+      : base(format_str, eh), num_args_(num_args) {}
+
+  FMT_CONSTEXPR auto next_arg_id() -> int {
+    int id = base::next_arg_id();
+    if (id >= num_args_) this->on_error("argument not found");
+    return id;
+  }
+
+  FMT_CONSTEXPR void check_arg_id(int id) {
+    base::check_arg_id(id);
+    if (id >= num_args_) this->on_error("argument not found");
+  }
+  using base::check_arg_id;
+};
+
+template <typename ErrorHandler>
+FMT_CONSTEXPR void check_int_type_spec(presentation_type type,
+                                       ErrorHandler&& eh) {
+  if (type > presentation_type::bin_upper && type != presentation_type::chr)
+    eh.on_error("invalid type specifier");
+}
+
+// Checks char specs and returns true if the type spec is char (and not int).
+template <typename Char, typename ErrorHandler = error_handler>
+FMT_CONSTEXPR auto check_char_specs(const basic_format_specs<Char>& specs,
+                                    ErrorHandler&& eh = {}) -> bool {
+  if (specs.type != presentation_type::none &&
+      specs.type != presentation_type::chr) {
+    check_int_type_spec(specs.type, eh);
+    return false;
+  }
+  if (specs.align == align::numeric || specs.sign != sign::none || specs.alt)
+    eh.on_error("invalid format specifier for char");
+  return true;
+}
+
+// A floating-point presentation format.
+enum class float_format : unsigned char {
+  general,  // General: exponent notation or fixed point based on magnitude.
+  exp,      // Exponent notation with the default precision of 6, e.g. 1.2e-3.
+  fixed,    // Fixed point with the default precision of 6, e.g. 0.0012.
+  hex
+};
+
+struct float_specs {
+  int precision;
+  float_format format : 8;
+  sign_t sign : 8;
+  bool upper : 1;
+  bool locale : 1;
+  bool binary32 : 1;
+  bool fallback : 1;
+  bool showpoint : 1;
+};
+
+template <typename ErrorHandler = error_handler, typename Char>
+FMT_CONSTEXPR auto parse_float_type_spec(const basic_format_specs<Char>& specs,
+                                         ErrorHandler&& eh = {})
+    -> float_specs {
+  auto result = float_specs();
+  result.showpoint = specs.alt;
+  result.locale = specs.localized;
+  switch (specs.type) {
+  case presentation_type::none:
+    result.format = float_format::general;
+    break;
+  case presentation_type::general_upper:
+    result.upper = true;
+    FMT_FALLTHROUGH;
+  case presentation_type::general_lower:
+    result.format = float_format::general;
+    break;
+  case presentation_type::exp_upper:
+    result.upper = true;
+    FMT_FALLTHROUGH;
+  case presentation_type::exp_lower:
+    result.format = float_format::exp;
+    result.showpoint |= specs.precision != 0;
+    break;
+  case presentation_type::fixed_upper:
+    result.upper = true;
+    FMT_FALLTHROUGH;
+  case presentation_type::fixed_lower:
+    result.format = float_format::fixed;
+    result.showpoint |= specs.precision != 0;
+    break;
+  case presentation_type::hexfloat_upper:
+    result.upper = true;
+    FMT_FALLTHROUGH;
+  case presentation_type::hexfloat_lower:
+    result.format = float_format::hex;
+    break;
+  default:
+    eh.on_error("invalid type specifier");
+    break;
+  }
+  return result;
+}
+
+template <typename ErrorHandler = error_handler>
+FMT_CONSTEXPR auto check_cstring_type_spec(presentation_type type,
+                                           ErrorHandler&& eh = {}) -> bool {
+  if (type == presentation_type::none || type == presentation_type::string)
+    return true;
+  if (type != presentation_type::pointer) eh.on_error("invalid type specifier");
+  return false;
+}
+
+template <typename ErrorHandler = error_handler>
+FMT_CONSTEXPR void check_string_type_spec(presentation_type type,
+                                          ErrorHandler&& eh = {}) {
+  if (type != presentation_type::none && type != presentation_type::string)
+    eh.on_error("invalid type specifier");
+}
+
+template <typename ErrorHandler>
+FMT_CONSTEXPR void check_pointer_type_spec(presentation_type type,
+                                           ErrorHandler&& eh) {
+  if (type != presentation_type::none && type != presentation_type::pointer)
+    eh.on_error("invalid type specifier");
+}
+
+// A parse_format_specs handler that checks if specifiers are consistent with
+// the argument type.
+template <typename Handler> class specs_checker : public Handler {
+ private:
+  detail::type arg_type_;
+
+  FMT_CONSTEXPR void require_numeric_argument() {
+    if (!is_arithmetic_type(arg_type_))
+      this->on_error("format specifier requires numeric argument");
+  }
+
+ public:
+  FMT_CONSTEXPR specs_checker(const Handler& handler, detail::type arg_type)
+      : Handler(handler), arg_type_(arg_type) {}
+
+  FMT_CONSTEXPR void on_align(align_t align) {
+    if (align == align::numeric) require_numeric_argument();
+    Handler::on_align(align);
+  }
+
+  FMT_CONSTEXPR void on_sign(sign_t s) {
+    require_numeric_argument();
+    if (is_integral_type(arg_type_) && arg_type_ != type::int_type &&
+        arg_type_ != type::long_long_type && arg_type_ != type::char_type) {
+      this->on_error("format specifier requires signed argument");
+    }
+    Handler::on_sign(s);
+  }
+
+  FMT_CONSTEXPR void on_hash() {
+    require_numeric_argument();
+    Handler::on_hash();
+  }
+
+  FMT_CONSTEXPR void on_localized() {
+    require_numeric_argument();
+    Handler::on_localized();
+  }
+
+  FMT_CONSTEXPR void on_zero() {
+    require_numeric_argument();
+    Handler::on_zero();
+  }
+
+  FMT_CONSTEXPR void end_precision() {
+    if (is_integral_type(arg_type_) || arg_type_ == type::pointer_type)
+      this->on_error("precision not allowed for this argument type");
+  }
+};
+
+constexpr int invalid_arg_index = -1;
+
+#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+template <int N, typename T, typename... Args, typename Char>
+constexpr auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
+  if constexpr (detail::is_statically_named_arg<T>()) {
+    if (name == T::name) return N;
+  }
+  if constexpr (sizeof...(Args) > 0)
+    return get_arg_index_by_name<N + 1, Args...>(name);
+  (void)name;  // Workaround an MSVC bug about "unused" parameter.
+  return invalid_arg_index;
+}
+#endif
+
+template <typename... Args, typename Char>
+FMT_CONSTEXPR auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
+#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+  if constexpr (sizeof...(Args) > 0)
+    return get_arg_index_by_name<0, Args...>(name);
+#endif
+  (void)name;
+  return invalid_arg_index;
+}
+
+template <typename Char, typename ErrorHandler, typename... Args>
+class format_string_checker {
+ private:
+  using parse_context_type = compile_parse_context<Char, ErrorHandler>;
+  enum { num_args = sizeof...(Args) };
+
+  // Format specifier parsing function.
+  using parse_func = const Char* (*)(parse_context_type&);
+
+  parse_context_type context_;
+  parse_func parse_funcs_[num_args > 0 ? num_args : 1];
+
+ public:
+  explicit FMT_CONSTEXPR format_string_checker(
+      basic_string_view<Char> format_str, ErrorHandler eh)
+      : context_(format_str, num_args, eh),
+        parse_funcs_{&parse_format_specs<Args, parse_context_type>...} {}
+
+  FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
+
+  FMT_CONSTEXPR auto on_arg_id() -> int { return context_.next_arg_id(); }
+  FMT_CONSTEXPR auto on_arg_id(int id) -> int {
+    return context_.check_arg_id(id), id;
+  }
+  FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
+#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+    auto index = get_arg_index_by_name<Args...>(id);
+    if (index == invalid_arg_index) on_error("named argument is not found");
+    return context_.check_arg_id(index), index;
+#else
+    (void)id;
+    on_error("compile-time checks for named arguments require C++20 support");
+    return 0;
+#endif
+  }
+
+  FMT_CONSTEXPR void on_replacement_field(int, const Char*) {}
+
+  FMT_CONSTEXPR auto on_format_specs(int id, const Char* begin, const Char*)
+      -> const Char* {
+    context_.advance_to(context_.begin() + (begin - &*context_.begin()));
+    // id >= 0 check is a workaround for gcc 10 bug (#2065).
+    return id >= 0 && id < num_args ? parse_funcs_[id](context_) : begin;
+  }
+
+  FMT_CONSTEXPR void on_error(const char* message) {
+    context_.on_error(message);
+  }
+};
+
+template <typename... Args, typename S,
+          enable_if_t<(is_compile_string<S>::value), int>>
+void check_format_string(S format_str) {
+  FMT_CONSTEXPR auto s = to_string_view(format_str);
+  using checker = format_string_checker<typename S::char_type, error_handler,
+                                        remove_cvref_t<Args>...>;
+  FMT_CONSTEXPR bool invalid_format =
+      (parse_format_string<true>(s, checker(s, {})), true);
+  ignore_unused(invalid_format);
+}
+
+template <typename Char>
+void vformat_to(
+    buffer<Char>& buf, basic_string_view<Char> fmt,
+    basic_format_args<FMT_BUFFER_CONTEXT(type_identity_t<Char>)> args,
+    locale_ref loc = {});
+
+FMT_API void vprint_mojibake(std::FILE*, string_view, format_args);
+#ifndef _WIN32
+inline void vprint_mojibake(std::FILE*, string_view, format_args) {}
+#endif
+FMT_END_DETAIL_NAMESPACE
+
+// A formatter specialization for the core types corresponding to detail::type
+// constants.
+template <typename T, typename Char>
+struct formatter<T, Char,
+                 enable_if_t<detail::type_constant<T, Char>::value !=
+                             detail::type::custom_type>> {
+ private:
+  detail::dynamic_format_specs<Char> specs_;
+
+ public:
+  // Parses format specifiers stopping either at the end of the range or at the
+  // terminating '}'.
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    auto begin = ctx.begin(), end = ctx.end();
+    if (begin == end) return begin;
+    using handler_type = detail::dynamic_specs_handler<ParseContext>;
+    auto type = detail::type_constant<T, Char>::value;
+    auto checker =
+        detail::specs_checker<handler_type>(handler_type(specs_, ctx), type);
+    auto it = detail::parse_format_specs(begin, end, checker);
+    auto eh = ctx.error_handler();
+    switch (type) {
+    case detail::type::none_type:
+      FMT_ASSERT(false, "invalid argument type");
+      break;
+    case detail::type::bool_type:
+      if (specs_.type == presentation_type::none ||
+          specs_.type == presentation_type::string) {
+        break;
+      }
+      FMT_FALLTHROUGH;
+    case detail::type::int_type:
+    case detail::type::uint_type:
+    case detail::type::long_long_type:
+    case detail::type::ulong_long_type:
+    case detail::type::int128_type:
+    case detail::type::uint128_type:
+      detail::check_int_type_spec(specs_.type, eh);
+      break;
+    case detail::type::char_type:
+      detail::check_char_specs(specs_, eh);
+      break;
+    case detail::type::float_type:
+      if (detail::const_check(FMT_USE_FLOAT))
+        detail::parse_float_type_spec(specs_, eh);
+      else
+        FMT_ASSERT(false, "float support disabled");
+      break;
+    case detail::type::double_type:
+      if (detail::const_check(FMT_USE_DOUBLE))
+        detail::parse_float_type_spec(specs_, eh);
+      else
+        FMT_ASSERT(false, "double support disabled");
+      break;
+    case detail::type::long_double_type:
+      if (detail::const_check(FMT_USE_LONG_DOUBLE))
+        detail::parse_float_type_spec(specs_, eh);
+      else
+        FMT_ASSERT(false, "long double support disabled");
+      break;
+    case detail::type::cstring_type:
+      detail::check_cstring_type_spec(specs_.type, eh);
+      break;
+    case detail::type::string_type:
+      detail::check_string_type_spec(specs_.type, eh);
+      break;
+    case detail::type::pointer_type:
+      detail::check_pointer_type_spec(specs_.type, eh);
+      break;
+    case detail::type::custom_type:
+      // Custom format specifiers are checked in parse functions of
+      // formatter specializations.
+      break;
+    }
+    return it;
+  }
+
+  template <typename FormatContext>
+  FMT_CONSTEXPR auto format(const T& val, FormatContext& ctx) const
+      -> decltype(ctx.out());
+};
+
+template <typename Char> struct basic_runtime { basic_string_view<Char> str; };
+
+/** A compile-time format string. */
+template <typename Char, typename... Args> class basic_format_string {
+ private:
+  basic_string_view<Char> str_;
+
+ public:
+  template <typename S,
+            FMT_ENABLE_IF(
+                std::is_convertible<const S&, basic_string_view<Char>>::value)>
+  FMT_CONSTEVAL FMT_INLINE basic_format_string(const S& s) : str_(s) {
+    static_assert(
+        detail::count<
+            (std::is_base_of<detail::view, remove_reference_t<Args>>::value &&
+             std::is_reference<Args>::value)...>() == 0,
+        "passing views as lvalues is disallowed");
+#ifdef FMT_HAS_CONSTEVAL
+    if constexpr (detail::count_named_args<Args...>() ==
+                  detail::count_statically_named_args<Args...>()) {
+      using checker = detail::format_string_checker<Char, detail::error_handler,
+                                                    remove_cvref_t<Args>...>;
+      detail::parse_format_string<true>(str_, checker(s, {}));
+    }
+#else
+    detail::check_format_string<Args...>(s);
+#endif
+  }
+  basic_format_string(basic_runtime<Char> r) : str_(r.str) {}
+
+  FMT_INLINE operator basic_string_view<Char>() const { return str_; }
+};
+
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+// Workaround broken conversion on older gcc.
+template <typename... Args> using format_string = string_view;
+template <typename S> auto runtime(const S& s) -> basic_string_view<char_t<S>> {
+  return s;
+}
+#else
+template <typename... Args>
+using format_string = basic_format_string<char, type_identity_t<Args>...>;
+/**
+  \rst
+  Creates a runtime format string.
+
+  **Example**::
+
+    // Check format string at runtime instead of compile-time.
+    fmt::print(fmt::runtime("{:d}"), "I am not a number");
+  \endrst
+ */
+template <typename S> auto runtime(const S& s) -> basic_runtime<char_t<S>> {
+  return {{s}};
+}
+#endif
+
+FMT_API auto vformat(string_view fmt, format_args args) -> std::string;
+
+/**
+  \rst
+  Formats ``args`` according to specifications in ``fmt`` and returns the result
+  as a string.
+
+  **Example**::
+
+    #include <fmt/core.h>
+    std::string message = fmt::format("The answer is {}.", 42);
+  \endrst
+*/
+template <typename... T>
+FMT_NODISCARD FMT_INLINE auto format(format_string<T...> fmt, T&&... args)
+    -> std::string {
+  return vformat(fmt, fmt::make_format_args(args...));
+}
+
+/** Formats a string and writes the output to ``out``. */
+template <typename OutputIt,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
+auto vformat_to(OutputIt out, string_view fmt, format_args args) -> OutputIt {
+  using detail::get_buffer;
+  auto&& buf = get_buffer<char>(out);
+  detail::vformat_to(buf, fmt, args, {});
+  return detail::get_iterator(buf);
+}
+
+/**
+ \rst
+ Formats ``args`` according to specifications in ``fmt``, writes the result to
+ the output iterator ``out`` and returns the iterator past the end of the output
+ range. `format_to` does not append a terminating null character.
+
+ **Example**::
+
+   auto out = std::vector<char>();
+   fmt::format_to(std::back_inserter(out), "{}", 42);
+ \endrst
+ */
+template <typename OutputIt, typename... T,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
+FMT_INLINE auto format_to(OutputIt out, format_string<T...> fmt, T&&... args)
+    -> OutputIt {
+  return vformat_to(out, fmt, fmt::make_format_args(args...));
+}
+
+template <typename OutputIt> struct format_to_n_result {
+  /** Iterator past the end of the output range. */
+  OutputIt out;
+  /** Total (not truncated) output size. */
+  size_t size;
+};
+
+template <typename OutputIt, typename... T,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
+auto vformat_to_n(OutputIt out, size_t n, string_view fmt, format_args args)
+    -> format_to_n_result<OutputIt> {
+  using traits = detail::fixed_buffer_traits;
+  auto buf = detail::iterator_buffer<OutputIt, char, traits>(out, n);
+  detail::vformat_to(buf, fmt, args, {});
+  return {buf.out(), buf.count()};
+}
+
+/**
+  \rst
+  Formats ``args`` according to specifications in ``fmt``, writes up to ``n``
+  characters of the result to the output iterator ``out`` and returns the total
+  (not truncated) output size and the iterator past the end of the output range.
+  `format_to_n` does not append a terminating null character.
+  \endrst
+ */
+template <typename OutputIt, typename... T,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
+FMT_INLINE auto format_to_n(OutputIt out, size_t n, format_string<T...> fmt,
+                            T&&... args) -> format_to_n_result<OutputIt> {
+  return vformat_to_n(out, n, fmt, fmt::make_format_args(args...));
+}
+
+/** Returns the number of chars in the output of ``format(fmt, args...)``. */
+template <typename... T>
+FMT_NODISCARD FMT_INLINE auto formatted_size(format_string<T...> fmt,
+                                             T&&... args) -> size_t {
+  auto buf = detail::counting_buffer<>();
+  detail::vformat_to(buf, string_view(fmt), fmt::make_format_args(args...), {});
+  return buf.count();
+}
+
+FMT_API void vprint(string_view fmt, format_args args);
+FMT_API void vprint(std::FILE* f, string_view fmt, format_args args);
+
+/**
+  \rst
+  Formats ``args`` according to specifications in ``fmt`` and writes the output
+  to ``stdout``.
+
+  **Example**::
+
+    fmt::print("Elapsed time: {0:.2f} seconds", 1.23);
+  \endrst
+ */
+template <typename... T>
+FMT_INLINE void print(format_string<T...> fmt, T&&... args) {
+  const auto& vargs = fmt::make_format_args(args...);
+  return detail::is_utf8() ? vprint(fmt, vargs)
+                           : detail::vprint_mojibake(stdout, fmt, vargs);
+}
+
+/**
+  \rst
+  Formats ``args`` according to specifications in ``fmt`` and writes the
+  output to the file ``f``.
+
+  **Example**::
+
+    fmt::print(stderr, "Don't {}!", "panic");
+  \endrst
+ */
+template <typename... T>
+FMT_INLINE void print(std::FILE* f, format_string<T...> fmt, T&&... args) {
+  const auto& vargs = fmt::make_format_args(args...);
+  return detail::is_utf8() ? vprint(f, fmt, vargs)
+                           : detail::vprint_mojibake(f, fmt, vargs);
+}
+
+FMT_MODULE_EXPORT_END
+FMT_GCC_PRAGMA("GCC pop_options")
+FMT_END_NAMESPACE
+
+#ifdef FMT_HEADER_ONLY
+#  include "format.h"
+#endif
+#endif  // FMT_CORE_H_
diff --git a/3rdparty/fmt/include/fmt/format-inl.h b/3rdparty/fmt/include/fmt/format-inl.h
new file mode 100644
index 00000000..2c51c50a
--- /dev/null
+++ b/3rdparty/fmt/include/fmt/format-inl.h
@@ -0,0 +1,2643 @@
+// Formatting library for C++ - implementation
+//
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_FORMAT_INL_H_
+#define FMT_FORMAT_INL_H_
+
+#include <algorithm>
+#include <cctype>
+#include <cerrno>  // errno
+#include <climits>
+#include <cmath>
+#include <cstdarg>
+#include <cstring>  // std::memmove
+#include <cwchar>
+#include <exception>
+
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+#  include <locale>
+#endif
+
+#ifdef _WIN32
+#  include <io.h>  // _isatty
+#endif
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+FMT_FUNC void assert_fail(const char* file, int line, const char* message) {
+  // Use unchecked std::fprintf to avoid triggering another assertion when
+  // writing to stderr fails
+  std::fprintf(stderr, "%s:%d: assertion failed: %s", file, line, message);
+  // Chosen instead of std::abort to satisfy Clang in CUDA mode during device
+  // code pass.
+  std::terminate();
+}
+
+FMT_FUNC void throw_format_error(const char* message) {
+  FMT_THROW(format_error(message));
+}
+
+#ifndef _MSC_VER
+#  define FMT_SNPRINTF snprintf
+#else  // _MSC_VER
+inline int fmt_snprintf(char* buffer, size_t size, const char* format, ...) {
+  va_list args;
+  va_start(args, format);
+  int result = vsnprintf_s(buffer, size, _TRUNCATE, format, args);
+  va_end(args);
+  return result;
+}
+#  define FMT_SNPRINTF fmt_snprintf
+#endif  // _MSC_VER
+
+FMT_FUNC void format_error_code(detail::buffer<char>& out, int error_code,
+                                string_view message) FMT_NOEXCEPT {
+  // Report error code making sure that the output fits into
+  // inline_buffer_size to avoid dynamic memory allocation and potential
+  // bad_alloc.
+  out.try_resize(0);
+  static const char SEP[] = ": ";
+  static const char ERROR_STR[] = "error ";
+  // Subtract 2 to account for terminating null characters in SEP and ERROR_STR.
+  size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2;
+  auto abs_value = static_cast<uint32_or_64_or_128_t<int>>(error_code);
+  if (detail::is_negative(error_code)) {
+    abs_value = 0 - abs_value;
+    ++error_code_size;
+  }
+  error_code_size += detail::to_unsigned(detail::count_digits(abs_value));
+  auto it = buffer_appender<char>(out);
+  if (message.size() <= inline_buffer_size - error_code_size)
+    format_to(it, FMT_STRING("{}{}"), message, SEP);
+  format_to(it, FMT_STRING("{}{}"), ERROR_STR, error_code);
+  FMT_ASSERT(out.size() <= inline_buffer_size, "");
+}
+
+FMT_FUNC void report_error(format_func func, int error_code,
+                           const char* message) FMT_NOEXCEPT {
+  memory_buffer full_message;
+  func(full_message, error_code, message);
+  // Don't use fwrite_fully because the latter may throw.
+  if (std::fwrite(full_message.data(), full_message.size(), 1, stderr) > 0)
+    std::fputc('\n', stderr);
+}
+
+// A wrapper around fwrite that throws on error.
+inline void fwrite_fully(const void* ptr, size_t size, size_t count,
+                         FILE* stream) {
+  size_t written = std::fwrite(ptr, size, count, stream);
+  if (written < count) FMT_THROW(system_error(errno, "cannot write to file"));
+}
+
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+template <typename Locale>
+locale_ref::locale_ref(const Locale& loc) : locale_(&loc) {
+  static_assert(std::is_same<Locale, std::locale>::value, "");
+}
+
+template <typename Locale> Locale locale_ref::get() const {
+  static_assert(std::is_same<Locale, std::locale>::value, "");
+  return locale_ ? *static_cast<const std::locale*>(locale_) : std::locale();
+}
+
+template <typename Char>
+FMT_FUNC auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result<Char> {
+  auto& facet = std::use_facet<std::numpunct<Char>>(loc.get<std::locale>());
+  auto grouping = facet.grouping();
+  auto thousands_sep = grouping.empty() ? Char() : facet.thousands_sep();
+  return {std::move(grouping), thousands_sep};
+}
+template <typename Char> FMT_FUNC Char decimal_point_impl(locale_ref loc) {
+  return std::use_facet<std::numpunct<Char>>(loc.get<std::locale>())
+      .decimal_point();
+}
+#else
+template <typename Char>
+FMT_FUNC auto thousands_sep_impl(locale_ref) -> thousands_sep_result<Char> {
+  return {"\03", FMT_STATIC_THOUSANDS_SEPARATOR};
+}
+template <typename Char> FMT_FUNC Char decimal_point_impl(locale_ref) {
+  return '.';
+}
+#endif
+}  // namespace detail
+
+#if !FMT_MSC_VER
+FMT_API FMT_FUNC format_error::~format_error() FMT_NOEXCEPT = default;
+#endif
+
+FMT_FUNC std::system_error vsystem_error(int error_code, string_view format_str,
+                                         format_args args) {
+  auto ec = std::error_code(error_code, std::generic_category());
+  return std::system_error(ec, vformat(format_str, args));
+}
+
+namespace detail {
+
+template <> FMT_FUNC int count_digits<4>(detail::fallback_uintptr n) {
+  // fallback_uintptr is always stored in little endian.
+  int i = static_cast<int>(sizeof(void*)) - 1;
+  while (i > 0 && n.value[i] == 0) --i;
+  auto char_digits = std::numeric_limits<unsigned char>::digits / 4;
+  return i >= 0 ? i * char_digits + count_digits<4, unsigned>(n.value[i]) : 1;
+}
+
+// log10(2) = 0x0.4d104d427de7fbcc...
+static constexpr uint64_t log10_2_significand = 0x4d104d427de7fbcc;
+
+template <typename T = void> struct basic_impl_data {
+  // Normalized 64-bit significands of pow(10, k), for k = -348, -340, ..., 340.
+  // These are generated by support/compute-powers.py.
+  static constexpr uint64_t pow10_significands[87] = {
+      0xfa8fd5a0081c0288, 0xbaaee17fa23ebf76, 0x8b16fb203055ac76,
+      0xcf42894a5dce35ea, 0x9a6bb0aa55653b2d, 0xe61acf033d1a45df,
+      0xab70fe17c79ac6ca, 0xff77b1fcbebcdc4f, 0xbe5691ef416bd60c,
+      0x8dd01fad907ffc3c, 0xd3515c2831559a83, 0x9d71ac8fada6c9b5,
+      0xea9c227723ee8bcb, 0xaecc49914078536d, 0x823c12795db6ce57,
+      0xc21094364dfb5637, 0x9096ea6f3848984f, 0xd77485cb25823ac7,
+      0xa086cfcd97bf97f4, 0xef340a98172aace5, 0xb23867fb2a35b28e,
+      0x84c8d4dfd2c63f3b, 0xc5dd44271ad3cdba, 0x936b9fcebb25c996,
+      0xdbac6c247d62a584, 0xa3ab66580d5fdaf6, 0xf3e2f893dec3f126,
+      0xb5b5ada8aaff80b8, 0x87625f056c7c4a8b, 0xc9bcff6034c13053,
+      0x964e858c91ba2655, 0xdff9772470297ebd, 0xa6dfbd9fb8e5b88f,
+      0xf8a95fcf88747d94, 0xb94470938fa89bcf, 0x8a08f0f8bf0f156b,
+      0xcdb02555653131b6, 0x993fe2c6d07b7fac, 0xe45c10c42a2b3b06,
+      0xaa242499697392d3, 0xfd87b5f28300ca0e, 0xbce5086492111aeb,
+      0x8cbccc096f5088cc, 0xd1b71758e219652c, 0x9c40000000000000,
+      0xe8d4a51000000000, 0xad78ebc5ac620000, 0x813f3978f8940984,
+      0xc097ce7bc90715b3, 0x8f7e32ce7bea5c70, 0xd5d238a4abe98068,
+      0x9f4f2726179a2245, 0xed63a231d4c4fb27, 0xb0de65388cc8ada8,
+      0x83c7088e1aab65db, 0xc45d1df942711d9a, 0x924d692ca61be758,
+      0xda01ee641a708dea, 0xa26da3999aef774a, 0xf209787bb47d6b85,
+      0xb454e4a179dd1877, 0x865b86925b9bc5c2, 0xc83553c5c8965d3d,
+      0x952ab45cfa97a0b3, 0xde469fbd99a05fe3, 0xa59bc234db398c25,
+      0xf6c69a72a3989f5c, 0xb7dcbf5354e9bece, 0x88fcf317f22241e2,
+      0xcc20ce9bd35c78a5, 0x98165af37b2153df, 0xe2a0b5dc971f303a,
+      0xa8d9d1535ce3b396, 0xfb9b7cd9a4a7443c, 0xbb764c4ca7a44410,
+      0x8bab8eefb6409c1a, 0xd01fef10a657842c, 0x9b10a4e5e9913129,
+      0xe7109bfba19c0c9d, 0xac2820d9623bf429, 0x80444b5e7aa7cf85,
+      0xbf21e44003acdd2d, 0x8e679c2f5e44ff8f, 0xd433179d9c8cb841,
+      0x9e19db92b4e31ba9, 0xeb96bf6ebadf77d9, 0xaf87023b9bf0ee6b,
+  };
+
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+#  pragma GCC diagnostic push
+#  pragma GCC diagnostic ignored "-Wnarrowing"
+#endif
+  // Binary exponents of pow(10, k), for k = -348, -340, ..., 340, corresponding
+  // to significands above.
+  static constexpr int16_t pow10_exponents[87] = {
+      -1220, -1193, -1166, -1140, -1113, -1087, -1060, -1034, -1007, -980, -954,
+      -927,  -901,  -874,  -847,  -821,  -794,  -768,  -741,  -715,  -688, -661,
+      -635,  -608,  -582,  -555,  -529,  -502,  -475,  -449,  -422,  -396, -369,
+      -343,  -316,  -289,  -263,  -236,  -210,  -183,  -157,  -130,  -103, -77,
+      -50,   -24,   3,     30,    56,    83,    109,   136,   162,   189,  216,
+      242,   269,   295,   322,   348,   375,   402,   428,   455,   481,  508,
+      534,   561,   588,   614,   641,   667,   694,   720,   747,   774,  800,
+      827,   853,   880,   907,   933,   960,   986,   1013,  1039,  1066};
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+#  pragma GCC diagnostic pop
+#endif
+
+  static constexpr uint64_t power_of_10_64[20] = {
+      1, FMT_POWERS_OF_10(1ULL), FMT_POWERS_OF_10(1000000000ULL),
+      10000000000000000000ULL};
+};
+
+// This is a struct rather than an alias to avoid shadowing warnings in gcc.
+struct impl_data : basic_impl_data<> {};
+
+#if __cplusplus < 201703L
+template <typename T>
+constexpr uint64_t basic_impl_data<T>::pow10_significands[];
+template <typename T> constexpr int16_t basic_impl_data<T>::pow10_exponents[];
+template <typename T> constexpr uint64_t basic_impl_data<T>::power_of_10_64[];
+#endif
+
+template <typename T> struct bits {
+  static FMT_CONSTEXPR_DECL const int value =
+      static_cast<int>(sizeof(T) * std::numeric_limits<unsigned char>::digits);
+};
+
+// Returns the number of significand bits in Float excluding the implicit bit.
+template <typename Float> constexpr int num_significand_bits() {
+  // Subtract 1 to account for an implicit most significant bit in the
+  // normalized form.
+  return std::numeric_limits<Float>::digits - 1;
+}
+
+// A floating-point number f * pow(2, e).
+struct fp {
+  uint64_t f;
+  int e;
+
+  static constexpr const int num_significand_bits = bits<decltype(f)>::value;
+
+  constexpr fp() : f(0), e(0) {}
+  constexpr fp(uint64_t f_val, int e_val) : f(f_val), e(e_val) {}
+
+  // Constructs fp from an IEEE754 floating-point number. It is a template to
+  // prevent compile errors on systems where n is not IEEE754.
+  template <typename Float> explicit FMT_CONSTEXPR fp(Float n) { assign(n); }
+
+  template <typename Float>
+  using is_supported = bool_constant<sizeof(Float) == sizeof(uint64_t) ||
+                                     sizeof(Float) == sizeof(uint32_t)>;
+
+  // Assigns d to this and return true iff predecessor is closer than successor.
+  template <typename Float, FMT_ENABLE_IF(is_supported<Float>::value)>
+  FMT_CONSTEXPR bool assign(Float n) {
+    // Assume float is in the format [sign][exponent][significand].
+    const int num_float_significand_bits =
+        detail::num_significand_bits<Float>();
+    const uint64_t implicit_bit = 1ULL << num_float_significand_bits;
+    const uint64_t significand_mask = implicit_bit - 1;
+    constexpr bool is_double = sizeof(Float) == sizeof(uint64_t);
+    auto u = bit_cast<conditional_t<is_double, uint64_t, uint32_t>>(n);
+    f = u & significand_mask;
+    const uint64_t exponent_mask = (~0ULL >> 1) & ~significand_mask;
+    int biased_e =
+        static_cast<int>((u & exponent_mask) >> num_float_significand_bits);
+    // The predecessor is closer if n is a normalized power of 2 (f == 0) other
+    // than the smallest normalized number (biased_e > 1).
+    bool is_predecessor_closer = f == 0 && biased_e > 1;
+    if (biased_e != 0)
+      f += implicit_bit;
+    else
+      biased_e = 1;  // Subnormals use biased exponent 1 (min exponent).
+    const int exponent_bias = std::numeric_limits<Float>::max_exponent - 1;
+    e = biased_e - exponent_bias - num_float_significand_bits;
+    return is_predecessor_closer;
+  }
+
+  template <typename Float, FMT_ENABLE_IF(!is_supported<Float>::value)>
+  bool assign(Float) {
+    FMT_ASSERT(false, "");
+    return false;
+  }
+};
+
+// Normalizes the value converted from double and multiplied by (1 << SHIFT).
+template <int SHIFT = 0> FMT_CONSTEXPR fp normalize(fp value) {
+  // Handle subnormals.
+  const uint64_t implicit_bit = 1ULL << num_significand_bits<double>();
+  const auto shifted_implicit_bit = implicit_bit << SHIFT;
+  while ((value.f & shifted_implicit_bit) == 0) {
+    value.f <<= 1;
+    --value.e;
+  }
+  // Subtract 1 to account for hidden bit.
+  const auto offset =
+      fp::num_significand_bits - num_significand_bits<double>() - SHIFT - 1;
+  value.f <<= offset;
+  value.e -= offset;
+  return value;
+}
+
+inline bool operator==(fp x, fp y) { return x.f == y.f && x.e == y.e; }
+
+// Computes lhs * rhs / pow(2, 64) rounded to nearest with half-up tie breaking.
+FMT_CONSTEXPR inline uint64_t multiply(uint64_t lhs, uint64_t rhs) {
+#if FMT_USE_INT128
+  auto product = static_cast<__uint128_t>(lhs) * rhs;
+  auto f = static_cast<uint64_t>(product >> 64);
+  return (static_cast<uint64_t>(product) & (1ULL << 63)) != 0 ? f + 1 : f;
+#else
+  // Multiply 32-bit parts of significands.
+  uint64_t mask = (1ULL << 32) - 1;
+  uint64_t a = lhs >> 32, b = lhs & mask;
+  uint64_t c = rhs >> 32, d = rhs & mask;
+  uint64_t ac = a * c, bc = b * c, ad = a * d, bd = b * d;
+  // Compute mid 64-bit of result and round.
+  uint64_t mid = (bd >> 32) + (ad & mask) + (bc & mask) + (1U << 31);
+  return ac + (ad >> 32) + (bc >> 32) + (mid >> 32);
+#endif
+}
+
+FMT_CONSTEXPR inline fp operator*(fp x, fp y) {
+  return {multiply(x.f, y.f), x.e + y.e + 64};
+}
+
+// Returns a cached power of 10 `c_k = c_k.f * pow(2, c_k.e)` such that its
+// (binary) exponent satisfies `min_exponent <= c_k.e <= min_exponent + 28`.
+FMT_CONSTEXPR inline fp get_cached_power(int min_exponent,
+                                         int& pow10_exponent) {
+  const int shift = 32;
+  const auto significand = static_cast<int64_t>(log10_2_significand);
+  int index = static_cast<int>(
+      ((min_exponent + fp::num_significand_bits - 1) * (significand >> shift) +
+       ((int64_t(1) << shift) - 1))  // ceil
+      >> 32                          // arithmetic shift
+  );
+  // Decimal exponent of the first (smallest) cached power of 10.
+  const int first_dec_exp = -348;
+  // Difference between 2 consecutive decimal exponents in cached powers of 10.
+  const int dec_exp_step = 8;
+  index = (index - first_dec_exp - 1) / dec_exp_step + 1;
+  pow10_exponent = first_dec_exp + index * dec_exp_step;
+  return {impl_data::pow10_significands[index],
+          impl_data::pow10_exponents[index]};
+}
+
+// A simple accumulator to hold the sums of terms in bigint::square if uint128_t
+// is not available.
+struct accumulator {
+  uint64_t lower;
+  uint64_t upper;
+
+  constexpr accumulator() : lower(0), upper(0) {}
+  constexpr explicit operator uint32_t() const {
+    return static_cast<uint32_t>(lower);
+  }
+
+  FMT_CONSTEXPR void operator+=(uint64_t n) {
+    lower += n;
+    if (lower < n) ++upper;
+  }
+  FMT_CONSTEXPR void operator>>=(int shift) {
+    FMT_ASSERT(shift == 32, "");
+    (void)shift;
+    lower = (upper << 32) | (lower >> 32);
+    upper >>= 32;
+  }
+};
+
+class bigint {
+ private:
+  // A bigint is stored as an array of bigits (big digits), with bigit at index
+  // 0 being the least significant one.
+  using bigit = uint32_t;
+  using double_bigit = uint64_t;
+  enum { bigits_capacity = 32 };
+  basic_memory_buffer<bigit, bigits_capacity> bigits_;
+  int exp_;
+
+  FMT_CONSTEXPR20 bigit operator[](int index) const {
+    return bigits_[to_unsigned(index)];
+  }
+  FMT_CONSTEXPR20 bigit& operator[](int index) {
+    return bigits_[to_unsigned(index)];
+  }
+
+  static FMT_CONSTEXPR_DECL const int bigit_bits = bits<bigit>::value;
+
+  friend struct formatter<bigint>;
+
+  FMT_CONSTEXPR20 void subtract_bigits(int index, bigit other, bigit& borrow) {
+    auto result = static_cast<double_bigit>((*this)[index]) - other - borrow;
+    (*this)[index] = static_cast<bigit>(result);
+    borrow = static_cast<bigit>(result >> (bigit_bits * 2 - 1));
+  }
+
+  FMT_CONSTEXPR20 void remove_leading_zeros() {
+    int num_bigits = static_cast<int>(bigits_.size()) - 1;
+    while (num_bigits > 0 && (*this)[num_bigits] == 0) --num_bigits;
+    bigits_.resize(to_unsigned(num_bigits + 1));
+  }
+
+  // Computes *this -= other assuming aligned bigints and *this >= other.
+  FMT_CONSTEXPR20 void subtract_aligned(const bigint& other) {
+    FMT_ASSERT(other.exp_ >= exp_, "unaligned bigints");
+    FMT_ASSERT(compare(*this, other) >= 0, "");
+    bigit borrow = 0;
+    int i = other.exp_ - exp_;
+    for (size_t j = 0, n = other.bigits_.size(); j != n; ++i, ++j)
+      subtract_bigits(i, other.bigits_[j], borrow);
+    while (borrow > 0) subtract_bigits(i, 0, borrow);
+    remove_leading_zeros();
+  }
+
+  FMT_CONSTEXPR20 void multiply(uint32_t value) {
+    const double_bigit wide_value = value;
+    bigit carry = 0;
+    for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
+      double_bigit result = bigits_[i] * wide_value + carry;
+      bigits_[i] = static_cast<bigit>(result);
+      carry = static_cast<bigit>(result >> bigit_bits);
+    }
+    if (carry != 0) bigits_.push_back(carry);
+  }
+
+  FMT_CONSTEXPR20 void multiply(uint64_t value) {
+    const bigit mask = ~bigit(0);
+    const double_bigit lower = value & mask;
+    const double_bigit upper = value >> bigit_bits;
+    double_bigit carry = 0;
+    for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
+      double_bigit result = bigits_[i] * lower + (carry & mask);
+      carry =
+          bigits_[i] * upper + (result >> bigit_bits) + (carry >> bigit_bits);
+      bigits_[i] = static_cast<bigit>(result);
+    }
+    while (carry != 0) {
+      bigits_.push_back(carry & mask);
+      carry >>= bigit_bits;
+    }
+  }
+
+ public:
+  FMT_CONSTEXPR20 bigint() : exp_(0) {}
+  explicit bigint(uint64_t n) { assign(n); }
+  FMT_CONSTEXPR20 ~bigint() {
+    FMT_ASSERT(bigits_.capacity() <= bigits_capacity, "");
+  }
+
+  bigint(const bigint&) = delete;
+  void operator=(const bigint&) = delete;
+
+  FMT_CONSTEXPR20 void assign(const bigint& other) {
+    auto size = other.bigits_.size();
+    bigits_.resize(size);
+    auto data = other.bigits_.data();
+    std::copy(data, data + size, make_checked(bigits_.data(), size));
+    exp_ = other.exp_;
+  }
+
+  FMT_CONSTEXPR20 void assign(uint64_t n) {
+    size_t num_bigits = 0;
+    do {
+      bigits_[num_bigits++] = n & ~bigit(0);
+      n >>= bigit_bits;
+    } while (n != 0);
+    bigits_.resize(num_bigits);
+    exp_ = 0;
+  }
+
+  FMT_CONSTEXPR20 int num_bigits() const {
+    return static_cast<int>(bigits_.size()) + exp_;
+  }
+
+  FMT_NOINLINE FMT_CONSTEXPR20 bigint& operator<<=(int shift) {
+    FMT_ASSERT(shift >= 0, "");
+    exp_ += shift / bigit_bits;
+    shift %= bigit_bits;
+    if (shift == 0) return *this;
+    bigit carry = 0;
+    for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
+      bigit c = bigits_[i] >> (bigit_bits - shift);
+      bigits_[i] = (bigits_[i] << shift) + carry;
+      carry = c;
+    }
+    if (carry != 0) bigits_.push_back(carry);
+    return *this;
+  }
+
+  template <typename Int> FMT_CONSTEXPR20 bigint& operator*=(Int value) {
+    FMT_ASSERT(value > 0, "");
+    multiply(uint32_or_64_or_128_t<Int>(value));
+    return *this;
+  }
+
+  friend FMT_CONSTEXPR20 int compare(const bigint& lhs, const bigint& rhs) {
+    int num_lhs_bigits = lhs.num_bigits(), num_rhs_bigits = rhs.num_bigits();
+    if (num_lhs_bigits != num_rhs_bigits)
+      return num_lhs_bigits > num_rhs_bigits ? 1 : -1;
+    int i = static_cast<int>(lhs.bigits_.size()) - 1;
+    int j = static_cast<int>(rhs.bigits_.size()) - 1;
+    int end = i - j;
+    if (end < 0) end = 0;
+    for (; i >= end; --i, --j) {
+      bigit lhs_bigit = lhs[i], rhs_bigit = rhs[j];
+      if (lhs_bigit != rhs_bigit) return lhs_bigit > rhs_bigit ? 1 : -1;
+    }
+    if (i != j) return i > j ? 1 : -1;
+    return 0;
+  }
+
+  // Returns compare(lhs1 + lhs2, rhs).
+  friend FMT_CONSTEXPR20 int add_compare(const bigint& lhs1, const bigint& lhs2,
+                                         const bigint& rhs) {
+    int max_lhs_bigits = (std::max)(lhs1.num_bigits(), lhs2.num_bigits());
+    int num_rhs_bigits = rhs.num_bigits();
+    if (max_lhs_bigits + 1 < num_rhs_bigits) return -1;
+    if (max_lhs_bigits > num_rhs_bigits) return 1;
+    auto get_bigit = [](const bigint& n, int i) -> bigit {
+      return i >= n.exp_ && i < n.num_bigits() ? n[i - n.exp_] : 0;
+    };
+    double_bigit borrow = 0;
+    int min_exp = (std::min)((std::min)(lhs1.exp_, lhs2.exp_), rhs.exp_);
+    for (int i = num_rhs_bigits - 1; i >= min_exp; --i) {
+      double_bigit sum =
+          static_cast<double_bigit>(get_bigit(lhs1, i)) + get_bigit(lhs2, i);
+      bigit rhs_bigit = get_bigit(rhs, i);
+      if (sum > rhs_bigit + borrow) return 1;
+      borrow = rhs_bigit + borrow - sum;
+      if (borrow > 1) return -1;
+      borrow <<= bigit_bits;
+    }
+    return borrow != 0 ? -1 : 0;
+  }
+
+  // Assigns pow(10, exp) to this bigint.
+  FMT_CONSTEXPR20 void assign_pow10(int exp) {
+    FMT_ASSERT(exp >= 0, "");
+    if (exp == 0) return assign(1);
+    // Find the top bit.
+    int bitmask = 1;
+    while (exp >= bitmask) bitmask <<= 1;
+    bitmask >>= 1;
+    // pow(10, exp) = pow(5, exp) * pow(2, exp). First compute pow(5, exp) by
+    // repeated squaring and multiplication.
+    assign(5);
+    bitmask >>= 1;
+    while (bitmask != 0) {
+      square();
+      if ((exp & bitmask) != 0) *this *= 5;
+      bitmask >>= 1;
+    }
+    *this <<= exp;  // Multiply by pow(2, exp) by shifting.
+  }
+
+  FMT_CONSTEXPR20 void square() {
+    int num_bigits = static_cast<int>(bigits_.size());
+    int num_result_bigits = 2 * num_bigits;
+    basic_memory_buffer<bigit, bigits_capacity> n(std::move(bigits_));
+    bigits_.resize(to_unsigned(num_result_bigits));
+    using accumulator_t = conditional_t<FMT_USE_INT128, uint128_t, accumulator>;
+    auto sum = accumulator_t();
+    for (int bigit_index = 0; bigit_index < num_bigits; ++bigit_index) {
+      // Compute bigit at position bigit_index of the result by adding
+      // cross-product terms n[i] * n[j] such that i + j == bigit_index.
+      for (int i = 0, j = bigit_index; j >= 0; ++i, --j) {
+        // Most terms are multiplied twice which can be optimized in the future.
+        sum += static_cast<double_bigit>(n[i]) * n[j];
+      }
+      (*this)[bigit_index] = static_cast<bigit>(sum);
+      sum >>= bits<bigit>::value;  // Compute the carry.
+    }
+    // Do the same for the top half.
+    for (int bigit_index = num_bigits; bigit_index < num_result_bigits;
+         ++bigit_index) {
+      for (int j = num_bigits - 1, i = bigit_index - j; i < num_bigits;)
+        sum += static_cast<double_bigit>(n[i++]) * n[j--];
+      (*this)[bigit_index] = static_cast<bigit>(sum);
+      sum >>= bits<bigit>::value;
+    }
+    remove_leading_zeros();
+    exp_ *= 2;
+  }
+
+  // If this bigint has a bigger exponent than other, adds trailing zero to make
+  // exponents equal. This simplifies some operations such as subtraction.
+  FMT_CONSTEXPR20 void align(const bigint& other) {
+    int exp_difference = exp_ - other.exp_;
+    if (exp_difference <= 0) return;
+    int num_bigits = static_cast<int>(bigits_.size());
+    bigits_.resize(to_unsigned(num_bigits + exp_difference));
+    for (int i = num_bigits - 1, j = i + exp_difference; i >= 0; --i, --j)
+      bigits_[j] = bigits_[i];
+    std::uninitialized_fill_n(bigits_.data(), exp_difference, 0);
+    exp_ -= exp_difference;
+  }
+
+  // Divides this bignum by divisor, assigning the remainder to this and
+  // returning the quotient.
+  FMT_CONSTEXPR20 int divmod_assign(const bigint& divisor) {
+    FMT_ASSERT(this != &divisor, "");
+    if (compare(*this, divisor) < 0) return 0;
+    FMT_ASSERT(divisor.bigits_[divisor.bigits_.size() - 1u] != 0, "");
+    align(divisor);
+    int quotient = 0;
+    do {
+      subtract_aligned(divisor);
+      ++quotient;
+    } while (compare(*this, divisor) >= 0);
+    return quotient;
+  }
+};
+
+enum class round_direction { unknown, up, down };
+
+// Given the divisor (normally a power of 10), the remainder = v % divisor for
+// some number v and the error, returns whether v should be rounded up, down, or
+// whether the rounding direction can't be determined due to error.
+// error should be less than divisor / 2.
+FMT_CONSTEXPR inline round_direction get_round_direction(uint64_t divisor,
+                                                         uint64_t remainder,
+                                                         uint64_t error) {
+  FMT_ASSERT(remainder < divisor, "");  // divisor - remainder won't overflow.
+  FMT_ASSERT(error < divisor, "");      // divisor - error won't overflow.
+  FMT_ASSERT(error < divisor - error, "");  // error * 2 won't overflow.
+  // Round down if (remainder + error) * 2 <= divisor.
+  if (remainder <= divisor - remainder && error * 2 <= divisor - remainder * 2)
+    return round_direction::down;
+  // Round up if (remainder - error) * 2 >= divisor.
+  if (remainder >= error &&
+      remainder - error >= divisor - (remainder - error)) {
+    return round_direction::up;
+  }
+  return round_direction::unknown;
+}
+
+namespace digits {
+enum result {
+  more,  // Generate more digits.
+  done,  // Done generating digits.
+  error  // Digit generation cancelled due to an error.
+};
+}
+
+struct gen_digits_handler {
+  char* buf;
+  int size;
+  int precision;
+  int exp10;
+  bool fixed;
+
+  FMT_CONSTEXPR digits::result on_digit(char digit, uint64_t divisor,
+                                        uint64_t remainder, uint64_t error,
+                                        bool integral) {
+    FMT_ASSERT(remainder < divisor, "");
+    buf[size++] = digit;
+    if (!integral && error >= remainder) return digits::error;
+    if (size < precision) return digits::more;
+    if (!integral) {
+      // Check if error * 2 < divisor with overflow prevention.
+      // The check is not needed for the integral part because error = 1
+      // and divisor > (1 << 32) there.
+      if (error >= divisor || error >= divisor - error) return digits::error;
+    } else {
+      FMT_ASSERT(error == 1 && divisor > 2, "");
+    }
+    auto dir = get_round_direction(divisor, remainder, error);
+    if (dir != round_direction::up)
+      return dir == round_direction::down ? digits::done : digits::error;
+    ++buf[size - 1];
+    for (int i = size - 1; i > 0 && buf[i] > '9'; --i) {
+      buf[i] = '0';
+      ++buf[i - 1];
+    }
+    if (buf[0] > '9') {
+      buf[0] = '1';
+      if (fixed)
+        buf[size++] = '0';
+      else
+        ++exp10;
+    }
+    return digits::done;
+  }
+};
+
+// Generates output using the Grisu digit-gen algorithm.
+// error: the size of the region (lower, upper) outside of which numbers
+// definitely do not round to value (Delta in Grisu3).
+FMT_INLINE FMT_CONSTEXPR20 digits::result grisu_gen_digits(
+    fp value, uint64_t error, int& exp, gen_digits_handler& handler) {
+  const fp one(1ULL << -value.e, value.e);
+  // The integral part of scaled value (p1 in Grisu) = value / one. It cannot be
+  // zero because it contains a product of two 64-bit numbers with MSB set (due
+  // to normalization) - 1, shifted right by at most 60 bits.
+  auto integral = static_cast<uint32_t>(value.f >> -one.e);
+  FMT_ASSERT(integral != 0, "");
+  FMT_ASSERT(integral == value.f >> -one.e, "");
+  // The fractional part of scaled value (p2 in Grisu) c = value % one.
+  uint64_t fractional = value.f & (one.f - 1);
+  exp = count_digits(integral);  // kappa in Grisu.
+  // Non-fixed formats require at least one digit and no precision adjustment.
+  if (handler.fixed) {
+    // Adjust fixed precision by exponent because it is relative to decimal
+    // point.
+    int precision_offset = exp + handler.exp10;
+    if (precision_offset > 0 &&
+        handler.precision > max_value<int>() - precision_offset) {
+      FMT_THROW(format_error("number is too big"));
+    }
+    handler.precision += precision_offset;
+    // Check if precision is satisfied just by leading zeros, e.g.
+    // format("{:.2f}", 0.001) gives "0.00" without generating any digits.
+    if (handler.precision <= 0) {
+      if (handler.precision < 0) return digits::done;
+      // Divide by 10 to prevent overflow.
+      uint64_t divisor = impl_data::power_of_10_64[exp - 1] << -one.e;
+      auto dir = get_round_direction(divisor, value.f / 10, error * 10);
+      if (dir == round_direction::unknown) return digits::error;
+      handler.buf[handler.size++] = dir == round_direction::up ? '1' : '0';
+      return digits::done;
+    }
+  }
+  // Generate digits for the integral part. This can produce up to 10 digits.
+  do {
+    uint32_t digit = 0;
+    auto divmod_integral = [&](uint32_t divisor) {
+      digit = integral / divisor;
+      integral %= divisor;
+    };
+    // This optimization by Milo Yip reduces the number of integer divisions by
+    // one per iteration.
+    switch (exp) {
+    case 10:
+      divmod_integral(1000000000);
+      break;
+    case 9:
+      divmod_integral(100000000);
+      break;
+    case 8:
+      divmod_integral(10000000);
+      break;
+    case 7:
+      divmod_integral(1000000);
+      break;
+    case 6:
+      divmod_integral(100000);
+      break;
+    case 5:
+      divmod_integral(10000);
+      break;
+    case 4:
+      divmod_integral(1000);
+      break;
+    case 3:
+      divmod_integral(100);
+      break;
+    case 2:
+      divmod_integral(10);
+      break;
+    case 1:
+      digit = integral;
+      integral = 0;
+      break;
+    default:
+      FMT_ASSERT(false, "invalid number of digits");
+    }
+    --exp;
+    auto remainder = (static_cast<uint64_t>(integral) << -one.e) + fractional;
+    auto result = handler.on_digit(static_cast<char>('0' + digit),
+                                   impl_data::power_of_10_64[exp] << -one.e,
+                                   remainder, error, true);
+    if (result != digits::more) return result;
+  } while (exp > 0);
+  // Generate digits for the fractional part.
+  for (;;) {
+    fractional *= 10;
+    error *= 10;
+    char digit = static_cast<char>('0' + (fractional >> -one.e));
+    fractional &= one.f - 1;
+    --exp;
+    auto result = handler.on_digit(digit, one.f, fractional, error, false);
+    if (result != digits::more) return result;
+  }
+}
+
+// A 128-bit integer type used internally,
+struct uint128_wrapper {
+  uint128_wrapper() = default;
+
+#if FMT_USE_INT128
+  uint128_t internal_;
+
+  constexpr uint128_wrapper(uint64_t high, uint64_t low) FMT_NOEXCEPT
+      : internal_{static_cast<uint128_t>(low) |
+                  (static_cast<uint128_t>(high) << 64)} {}
+
+  constexpr uint128_wrapper(uint128_t u) : internal_{u} {}
+
+  constexpr uint64_t high() const FMT_NOEXCEPT {
+    return uint64_t(internal_ >> 64);
+  }
+  constexpr uint64_t low() const FMT_NOEXCEPT { return uint64_t(internal_); }
+
+  uint128_wrapper& operator+=(uint64_t n) FMT_NOEXCEPT {
+    internal_ += n;
+    return *this;
+  }
+#else
+  uint64_t high_;
+  uint64_t low_;
+
+  constexpr uint128_wrapper(uint64_t high, uint64_t low) FMT_NOEXCEPT
+      : high_{high},
+        low_{low} {}
+
+  constexpr uint64_t high() const FMT_NOEXCEPT { return high_; }
+  constexpr uint64_t low() const FMT_NOEXCEPT { return low_; }
+
+  uint128_wrapper& operator+=(uint64_t n) FMT_NOEXCEPT {
+#  if defined(_MSC_VER) && defined(_M_X64)
+    unsigned char carry = _addcarry_u64(0, low_, n, &low_);
+    _addcarry_u64(carry, high_, 0, &high_);
+    return *this;
+#  else
+    uint64_t sum = low_ + n;
+    high_ += (sum < low_ ? 1 : 0);
+    low_ = sum;
+    return *this;
+#  endif
+  }
+#endif
+};
+
+// Implementation of Dragonbox algorithm: https://github.com/jk-jeon/dragonbox.
+namespace dragonbox {
+// Computes 128-bit result of multiplication of two 64-bit unsigned integers.
+inline uint128_wrapper umul128(uint64_t x, uint64_t y) FMT_NOEXCEPT {
+#if FMT_USE_INT128
+  return static_cast<uint128_t>(x) * static_cast<uint128_t>(y);
+#elif defined(_MSC_VER) && defined(_M_X64)
+  uint128_wrapper result;
+  result.low_ = _umul128(x, y, &result.high_);
+  return result;
+#else
+  const uint64_t mask = (uint64_t(1) << 32) - uint64_t(1);
+
+  uint64_t a = x >> 32;
+  uint64_t b = x & mask;
+  uint64_t c = y >> 32;
+  uint64_t d = y & mask;
+
+  uint64_t ac = a * c;
+  uint64_t bc = b * c;
+  uint64_t ad = a * d;
+  uint64_t bd = b * d;
+
+  uint64_t intermediate = (bd >> 32) + (ad & mask) + (bc & mask);
+
+  return {ac + (intermediate >> 32) + (ad >> 32) + (bc >> 32),
+          (intermediate << 32) + (bd & mask)};
+#endif
+}
+
+// Computes upper 64 bits of multiplication of two 64-bit unsigned integers.
+inline uint64_t umul128_upper64(uint64_t x, uint64_t y) FMT_NOEXCEPT {
+#if FMT_USE_INT128
+  auto p = static_cast<uint128_t>(x) * static_cast<uint128_t>(y);
+  return static_cast<uint64_t>(p >> 64);
+#elif defined(_MSC_VER) && defined(_M_X64)
+  return __umulh(x, y);
+#else
+  return umul128(x, y).high();
+#endif
+}
+
+// Computes upper 64 bits of multiplication of a 64-bit unsigned integer and a
+// 128-bit unsigned integer.
+inline uint64_t umul192_upper64(uint64_t x, uint128_wrapper y) FMT_NOEXCEPT {
+  uint128_wrapper g0 = umul128(x, y.high());
+  g0 += umul128_upper64(x, y.low());
+  return g0.high();
+}
+
+// Computes upper 32 bits of multiplication of a 32-bit unsigned integer and a
+// 64-bit unsigned integer.
+inline uint32_t umul96_upper32(uint32_t x, uint64_t y) FMT_NOEXCEPT {
+  return static_cast<uint32_t>(umul128_upper64(x, y));
+}
+
+// Computes middle 64 bits of multiplication of a 64-bit unsigned integer and a
+// 128-bit unsigned integer.
+inline uint64_t umul192_middle64(uint64_t x, uint128_wrapper y) FMT_NOEXCEPT {
+  uint64_t g01 = x * y.high();
+  uint64_t g10 = umul128_upper64(x, y.low());
+  return g01 + g10;
+}
+
+// Computes lower 64 bits of multiplication of a 32-bit unsigned integer and a
+// 64-bit unsigned integer.
+inline uint64_t umul96_lower64(uint32_t x, uint64_t y) FMT_NOEXCEPT {
+  return x * y;
+}
+
+// Computes floor(log10(pow(2, e))) for e in [-1700, 1700] using the method from
+// https://fmt.dev/papers/Grisu-Exact.pdf#page=5, section 3.4.
+inline int floor_log10_pow2(int e) FMT_NOEXCEPT {
+  FMT_ASSERT(e <= 1700 && e >= -1700, "too large exponent");
+  const int shift = 22;
+  return (e * static_cast<int>(log10_2_significand >> (64 - shift))) >> shift;
+}
+
+// Various fast log computations.
+inline int floor_log2_pow10(int e) FMT_NOEXCEPT {
+  FMT_ASSERT(e <= 1233 && e >= -1233, "too large exponent");
+  const uint64_t log2_10_integer_part = 3;
+  const uint64_t log2_10_fractional_digits = 0x5269e12f346e2bf9;
+  const int shift_amount = 19;
+  return (e * static_cast<int>(
+                  (log2_10_integer_part << shift_amount) |
+                  (log2_10_fractional_digits >> (64 - shift_amount)))) >>
+         shift_amount;
+}
+inline int floor_log10_pow2_minus_log10_4_over_3(int e) FMT_NOEXCEPT {
+  FMT_ASSERT(e <= 1700 && e >= -1700, "too large exponent");
+  const uint64_t log10_4_over_3_fractional_digits = 0x1ffbfc2bbc780375;
+  const int shift_amount = 22;
+  return (e * static_cast<int>(log10_2_significand >> (64 - shift_amount)) -
+          static_cast<int>(log10_4_over_3_fractional_digits >>
+                           (64 - shift_amount))) >>
+         shift_amount;
+}
+
+// Returns true iff x is divisible by pow(2, exp).
+inline bool divisible_by_power_of_2(uint32_t x, int exp) FMT_NOEXCEPT {
+  FMT_ASSERT(exp >= 1, "");
+  FMT_ASSERT(x != 0, "");
+#ifdef FMT_BUILTIN_CTZ
+  return FMT_BUILTIN_CTZ(x) >= exp;
+#else
+  return exp < num_bits<uint32_t>() && x == ((x >> exp) << exp);
+#endif
+}
+inline bool divisible_by_power_of_2(uint64_t x, int exp) FMT_NOEXCEPT {
+  FMT_ASSERT(exp >= 1, "");
+  FMT_ASSERT(x != 0, "");
+#ifdef FMT_BUILTIN_CTZLL
+  return FMT_BUILTIN_CTZLL(x) >= exp;
+#else
+  return exp < num_bits<uint64_t>() && x == ((x >> exp) << exp);
+#endif
+}
+
+// Table entry type for divisibility test.
+template <typename T> struct divtest_table_entry {
+  T mod_inv;
+  T max_quotient;
+};
+
+// Returns true iff x is divisible by pow(5, exp).
+inline bool divisible_by_power_of_5(uint32_t x, int exp) FMT_NOEXCEPT {
+  FMT_ASSERT(exp <= 10, "too large exponent");
+  static constexpr const divtest_table_entry<uint32_t> divtest_table[] = {
+      {0x00000001, 0xffffffff}, {0xcccccccd, 0x33333333},
+      {0xc28f5c29, 0x0a3d70a3}, {0x26e978d5, 0x020c49ba},
+      {0x3afb7e91, 0x0068db8b}, {0x0bcbe61d, 0x0014f8b5},
+      {0x68c26139, 0x000431bd}, {0xae8d46a5, 0x0000d6bf},
+      {0x22e90e21, 0x00002af3}, {0x3a2e9c6d, 0x00000897},
+      {0x3ed61f49, 0x000001b7}};
+  return x * divtest_table[exp].mod_inv <= divtest_table[exp].max_quotient;
+}
+inline bool divisible_by_power_of_5(uint64_t x, int exp) FMT_NOEXCEPT {
+  FMT_ASSERT(exp <= 23, "too large exponent");
+  static constexpr const divtest_table_entry<uint64_t> divtest_table[] = {
+      {0x0000000000000001, 0xffffffffffffffff},
+      {0xcccccccccccccccd, 0x3333333333333333},
+      {0x8f5c28f5c28f5c29, 0x0a3d70a3d70a3d70},
+      {0x1cac083126e978d5, 0x020c49ba5e353f7c},
+      {0xd288ce703afb7e91, 0x0068db8bac710cb2},
+      {0x5d4e8fb00bcbe61d, 0x0014f8b588e368f0},
+      {0x790fb65668c26139, 0x000431bde82d7b63},
+      {0xe5032477ae8d46a5, 0x0000d6bf94d5e57a},
+      {0xc767074b22e90e21, 0x00002af31dc46118},
+      {0x8e47ce423a2e9c6d, 0x0000089705f4136b},
+      {0x4fa7f60d3ed61f49, 0x000001b7cdfd9d7b},
+      {0x0fee64690c913975, 0x00000057f5ff85e5},
+      {0x3662e0e1cf503eb1, 0x000000119799812d},
+      {0xa47a2cf9f6433fbd, 0x0000000384b84d09},
+      {0x54186f653140a659, 0x00000000b424dc35},
+      {0x7738164770402145, 0x0000000024075f3d},
+      {0xe4a4d1417cd9a041, 0x000000000734aca5},
+      {0xc75429d9e5c5200d, 0x000000000170ef54},
+      {0xc1773b91fac10669, 0x000000000049c977},
+      {0x26b172506559ce15, 0x00000000000ec1e4},
+      {0xd489e3a9addec2d1, 0x000000000002f394},
+      {0x90e860bb892c8d5d, 0x000000000000971d},
+      {0x502e79bf1b6f4f79, 0x0000000000001e39},
+      {0xdcd618596be30fe5, 0x000000000000060b}};
+  return x * divtest_table[exp].mod_inv <= divtest_table[exp].max_quotient;
+}
+
+// Replaces n by floor(n / pow(5, N)) returning true if and only if n is
+// divisible by pow(5, N).
+// Precondition: n <= 2 * pow(5, N + 1).
+template <int N>
+bool check_divisibility_and_divide_by_pow5(uint32_t& n) FMT_NOEXCEPT {
+  static constexpr struct {
+    uint32_t magic_number;
+    int bits_for_comparison;
+    uint32_t threshold;
+    int shift_amount;
+  } infos[] = {{0xcccd, 16, 0x3333, 18}, {0xa429, 8, 0x0a, 20}};
+  constexpr auto info = infos[N - 1];
+  n *= info.magic_number;
+  const uint32_t comparison_mask = (1u << info.bits_for_comparison) - 1;
+  bool result = (n & comparison_mask) <= info.threshold;
+  n >>= info.shift_amount;
+  return result;
+}
+
+// Computes floor(n / pow(10, N)) for small n and N.
+// Precondition: n <= pow(10, N + 1).
+template <int N> uint32_t small_division_by_pow10(uint32_t n) FMT_NOEXCEPT {
+  static constexpr struct {
+    uint32_t magic_number;
+    int shift_amount;
+    uint32_t divisor_times_10;
+  } infos[] = {{0xcccd, 19, 100}, {0xa3d8, 22, 1000}};
+  constexpr auto info = infos[N - 1];
+  FMT_ASSERT(n <= info.divisor_times_10, "n is too large");
+  return n * info.magic_number >> info.shift_amount;
+}
+
+// Computes floor(n / 10^(kappa + 1)) (float)
+inline uint32_t divide_by_10_to_kappa_plus_1(uint32_t n) FMT_NOEXCEPT {
+  return n / float_info<float>::big_divisor;
+}
+// Computes floor(n / 10^(kappa + 1)) (double)
+inline uint64_t divide_by_10_to_kappa_plus_1(uint64_t n) FMT_NOEXCEPT {
+  return umul128_upper64(n, 0x83126e978d4fdf3c) >> 9;
+}
+
+// Various subroutines using pow10 cache
+template <class T> struct cache_accessor;
+
+template <> struct cache_accessor<float> {
+  using carrier_uint = float_info<float>::carrier_uint;
+  using cache_entry_type = uint64_t;
+
+  static uint64_t get_cached_power(int k) FMT_NOEXCEPT {
+    FMT_ASSERT(k >= float_info<float>::min_k && k <= float_info<float>::max_k,
+               "k is out of range");
+    static constexpr const uint64_t pow10_significands[] = {
+        0x81ceb32c4b43fcf5, 0xa2425ff75e14fc32, 0xcad2f7f5359a3b3f,
+        0xfd87b5f28300ca0e, 0x9e74d1b791e07e49, 0xc612062576589ddb,
+        0xf79687aed3eec552, 0x9abe14cd44753b53, 0xc16d9a0095928a28,
+        0xf1c90080baf72cb2, 0x971da05074da7bef, 0xbce5086492111aeb,
+        0xec1e4a7db69561a6, 0x9392ee8e921d5d08, 0xb877aa3236a4b44a,
+        0xe69594bec44de15c, 0x901d7cf73ab0acda, 0xb424dc35095cd810,
+        0xe12e13424bb40e14, 0x8cbccc096f5088cc, 0xafebff0bcb24aaff,
+        0xdbe6fecebdedd5bf, 0x89705f4136b4a598, 0xabcc77118461cefd,
+        0xd6bf94d5e57a42bd, 0x8637bd05af6c69b6, 0xa7c5ac471b478424,
+        0xd1b71758e219652c, 0x83126e978d4fdf3c, 0xa3d70a3d70a3d70b,
+        0xcccccccccccccccd, 0x8000000000000000, 0xa000000000000000,
+        0xc800000000000000, 0xfa00000000000000, 0x9c40000000000000,
+        0xc350000000000000, 0xf424000000000000, 0x9896800000000000,
+        0xbebc200000000000, 0xee6b280000000000, 0x9502f90000000000,
+        0xba43b74000000000, 0xe8d4a51000000000, 0x9184e72a00000000,
+        0xb5e620f480000000, 0xe35fa931a0000000, 0x8e1bc9bf04000000,
+        0xb1a2bc2ec5000000, 0xde0b6b3a76400000, 0x8ac7230489e80000,
+        0xad78ebc5ac620000, 0xd8d726b7177a8000, 0x878678326eac9000,
+        0xa968163f0a57b400, 0xd3c21bcecceda100, 0x84595161401484a0,
+        0xa56fa5b99019a5c8, 0xcecb8f27f4200f3a, 0x813f3978f8940984,
+        0xa18f07d736b90be5, 0xc9f2c9cd04674ede, 0xfc6f7c4045812296,
+        0x9dc5ada82b70b59d, 0xc5371912364ce305, 0xf684df56c3e01bc6,
+        0x9a130b963a6c115c, 0xc097ce7bc90715b3, 0xf0bdc21abb48db20,
+        0x96769950b50d88f4, 0xbc143fa4e250eb31, 0xeb194f8e1ae525fd,
+        0x92efd1b8d0cf37be, 0xb7abc627050305ad, 0xe596b7b0c643c719,
+        0x8f7e32ce7bea5c6f, 0xb35dbf821ae4f38b, 0xe0352f62a19e306e};
+    return pow10_significands[k - float_info<float>::min_k];
+  }
+
+  static carrier_uint compute_mul(carrier_uint u,
+                                  const cache_entry_type& cache) FMT_NOEXCEPT {
+    return umul96_upper32(u, cache);
+  }
+
+  static uint32_t compute_delta(const cache_entry_type& cache,
+                                int beta_minus_1) FMT_NOEXCEPT {
+    return static_cast<uint32_t>(cache >> (64 - 1 - beta_minus_1));
+  }
+
+  static bool compute_mul_parity(carrier_uint two_f,
+                                 const cache_entry_type& cache,
+                                 int beta_minus_1) FMT_NOEXCEPT {
+    FMT_ASSERT(beta_minus_1 >= 1, "");
+    FMT_ASSERT(beta_minus_1 < 64, "");
+
+    return ((umul96_lower64(two_f, cache) >> (64 - beta_minus_1)) & 1) != 0;
+  }
+
+  static carrier_uint compute_left_endpoint_for_shorter_interval_case(
+      const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+    return static_cast<carrier_uint>(
+        (cache - (cache >> (float_info<float>::significand_bits + 2))) >>
+        (64 - float_info<float>::significand_bits - 1 - beta_minus_1));
+  }
+
+  static carrier_uint compute_right_endpoint_for_shorter_interval_case(
+      const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+    return static_cast<carrier_uint>(
+        (cache + (cache >> (float_info<float>::significand_bits + 1))) >>
+        (64 - float_info<float>::significand_bits - 1 - beta_minus_1));
+  }
+
+  static carrier_uint compute_round_up_for_shorter_interval_case(
+      const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+    return (static_cast<carrier_uint>(
+                cache >>
+                (64 - float_info<float>::significand_bits - 2 - beta_minus_1)) +
+            1) /
+           2;
+  }
+};
+
+template <> struct cache_accessor<double> {
+  using carrier_uint = float_info<double>::carrier_uint;
+  using cache_entry_type = uint128_wrapper;
+
+  static uint128_wrapper get_cached_power(int k) FMT_NOEXCEPT {
+    FMT_ASSERT(k >= float_info<double>::min_k && k <= float_info<double>::max_k,
+               "k is out of range");
+
+    static constexpr const uint128_wrapper pow10_significands[] = {
+#if FMT_USE_FULL_CACHE_DRAGONBOX
+      {0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
+      {0x9faacf3df73609b1, 0x77b191618c54e9ad},
+      {0xc795830d75038c1d, 0xd59df5b9ef6a2418},
+      {0xf97ae3d0d2446f25, 0x4b0573286b44ad1e},
+      {0x9becce62836ac577, 0x4ee367f9430aec33},
+      {0xc2e801fb244576d5, 0x229c41f793cda740},
+      {0xf3a20279ed56d48a, 0x6b43527578c11110},
+      {0x9845418c345644d6, 0x830a13896b78aaaa},
+      {0xbe5691ef416bd60c, 0x23cc986bc656d554},
+      {0xedec366b11c6cb8f, 0x2cbfbe86b7ec8aa9},
+      {0x94b3a202eb1c3f39, 0x7bf7d71432f3d6aa},
+      {0xb9e08a83a5e34f07, 0xdaf5ccd93fb0cc54},
+      {0xe858ad248f5c22c9, 0xd1b3400f8f9cff69},
+      {0x91376c36d99995be, 0x23100809b9c21fa2},
+      {0xb58547448ffffb2d, 0xabd40a0c2832a78b},
+      {0xe2e69915b3fff9f9, 0x16c90c8f323f516d},
+      {0x8dd01fad907ffc3b, 0xae3da7d97f6792e4},
+      {0xb1442798f49ffb4a, 0x99cd11cfdf41779d},
+      {0xdd95317f31c7fa1d, 0x40405643d711d584},
+      {0x8a7d3eef7f1cfc52, 0x482835ea666b2573},
+      {0xad1c8eab5ee43b66, 0xda3243650005eed0},
+      {0xd863b256369d4a40, 0x90bed43e40076a83},
+      {0x873e4f75e2224e68, 0x5a7744a6e804a292},
+      {0xa90de3535aaae202, 0x711515d0a205cb37},
+      {0xd3515c2831559a83, 0x0d5a5b44ca873e04},
+      {0x8412d9991ed58091, 0xe858790afe9486c3},
+      {0xa5178fff668ae0b6, 0x626e974dbe39a873},
+      {0xce5d73ff402d98e3, 0xfb0a3d212dc81290},
+      {0x80fa687f881c7f8e, 0x7ce66634bc9d0b9a},
+      {0xa139029f6a239f72, 0x1c1fffc1ebc44e81},
+      {0xc987434744ac874e, 0xa327ffb266b56221},
+      {0xfbe9141915d7a922, 0x4bf1ff9f0062baa9},
+      {0x9d71ac8fada6c9b5, 0x6f773fc3603db4aa},
+      {0xc4ce17b399107c22, 0xcb550fb4384d21d4},
+      {0xf6019da07f549b2b, 0x7e2a53a146606a49},
+      {0x99c102844f94e0fb, 0x2eda7444cbfc426e},
+      {0xc0314325637a1939, 0xfa911155fefb5309},
+      {0xf03d93eebc589f88, 0x793555ab7eba27cb},
+      {0x96267c7535b763b5, 0x4bc1558b2f3458df},
+      {0xbbb01b9283253ca2, 0x9eb1aaedfb016f17},
+      {0xea9c227723ee8bcb, 0x465e15a979c1cadd},
+      {0x92a1958a7675175f, 0x0bfacd89ec191eca},
+      {0xb749faed14125d36, 0xcef980ec671f667c},
+      {0xe51c79a85916f484, 0x82b7e12780e7401b},
+      {0x8f31cc0937ae58d2, 0xd1b2ecb8b0908811},
+      {0xb2fe3f0b8599ef07, 0x861fa7e6dcb4aa16},
+      {0xdfbdcece67006ac9, 0x67a791e093e1d49b},
+      {0x8bd6a141006042bd, 0xe0c8bb2c5c6d24e1},
+      {0xaecc49914078536d, 0x58fae9f773886e19},
+      {0xda7f5bf590966848, 0xaf39a475506a899f},
+      {0x888f99797a5e012d, 0x6d8406c952429604},
+      {0xaab37fd7d8f58178, 0xc8e5087ba6d33b84},
+      {0xd5605fcdcf32e1d6, 0xfb1e4a9a90880a65},
+      {0x855c3be0a17fcd26, 0x5cf2eea09a550680},
+      {0xa6b34ad8c9dfc06f, 0xf42faa48c0ea481f},
+      {0xd0601d8efc57b08b, 0xf13b94daf124da27},
+      {0x823c12795db6ce57, 0x76c53d08d6b70859},
+      {0xa2cb1717b52481ed, 0x54768c4b0c64ca6f},
+      {0xcb7ddcdda26da268, 0xa9942f5dcf7dfd0a},
+      {0xfe5d54150b090b02, 0xd3f93b35435d7c4d},
+      {0x9efa548d26e5a6e1, 0xc47bc5014a1a6db0},
+      {0xc6b8e9b0709f109a, 0x359ab6419ca1091c},
+      {0xf867241c8cc6d4c0, 0xc30163d203c94b63},
+      {0x9b407691d7fc44f8, 0x79e0de63425dcf1e},
+      {0xc21094364dfb5636, 0x985915fc12f542e5},
+      {0xf294b943e17a2bc4, 0x3e6f5b7b17b2939e},
+      {0x979cf3ca6cec5b5a, 0xa705992ceecf9c43},
+      {0xbd8430bd08277231, 0x50c6ff782a838354},
+      {0xece53cec4a314ebd, 0xa4f8bf5635246429},
+      {0x940f4613ae5ed136, 0x871b7795e136be9a},
+      {0xb913179899f68584, 0x28e2557b59846e40},
+      {0xe757dd7ec07426e5, 0x331aeada2fe589d0},
+      {0x9096ea6f3848984f, 0x3ff0d2c85def7622},
+      {0xb4bca50b065abe63, 0x0fed077a756b53aa},
+      {0xe1ebce4dc7f16dfb, 0xd3e8495912c62895},
+      {0x8d3360f09cf6e4bd, 0x64712dd7abbbd95d},
+      {0xb080392cc4349dec, 0xbd8d794d96aacfb4},
+      {0xdca04777f541c567, 0xecf0d7a0fc5583a1},
+      {0x89e42caaf9491b60, 0xf41686c49db57245},
+      {0xac5d37d5b79b6239, 0x311c2875c522ced6},
+      {0xd77485cb25823ac7, 0x7d633293366b828c},
+      {0x86a8d39ef77164bc, 0xae5dff9c02033198},
+      {0xa8530886b54dbdeb, 0xd9f57f830283fdfd},
+      {0xd267caa862a12d66, 0xd072df63c324fd7c},
+      {0x8380dea93da4bc60, 0x4247cb9e59f71e6e},
+      {0xa46116538d0deb78, 0x52d9be85f074e609},
+      {0xcd795be870516656, 0x67902e276c921f8c},
+      {0x806bd9714632dff6, 0x00ba1cd8a3db53b7},
+      {0xa086cfcd97bf97f3, 0x80e8a40eccd228a5},
+      {0xc8a883c0fdaf7df0, 0x6122cd128006b2ce},
+      {0xfad2a4b13d1b5d6c, 0x796b805720085f82},
+      {0x9cc3a6eec6311a63, 0xcbe3303674053bb1},
+      {0xc3f490aa77bd60fc, 0xbedbfc4411068a9d},
+      {0xf4f1b4d515acb93b, 0xee92fb5515482d45},
+      {0x991711052d8bf3c5, 0x751bdd152d4d1c4b},
+      {0xbf5cd54678eef0b6, 0xd262d45a78a0635e},
+      {0xef340a98172aace4, 0x86fb897116c87c35},
+      {0x9580869f0e7aac0e, 0xd45d35e6ae3d4da1},
+      {0xbae0a846d2195712, 0x8974836059cca10a},
+      {0xe998d258869facd7, 0x2bd1a438703fc94c},
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+      {0xc45d1df942711d9a, 0x3ba5d0bd324f8394},
+      {0xf5746577930d6500, 0xca8f44ec7ee36479},
+      {0x9968bf6abbe85f20, 0x7e998b13cf4e1ecb},
+      {0xbfc2ef456ae276e8, 0x9e3fedd8c321a67e},
+      {0xefb3ab16c59b14a2, 0xc5cfe94ef3ea101e},
+      {0x95d04aee3b80ece5, 0xbba1f1d158724a12},
+      {0xbb445da9ca61281f, 0x2a8a6e45ae8edc97},
+      {0xea1575143cf97226, 0xf52d09d71a3293bd},
+      {0x924d692ca61be758, 0x593c2626705f9c56},
+      {0xb6e0c377cfa2e12e, 0x6f8b2fb00c77836c},
+      {0xe498f455c38b997a, 0x0b6dfb9c0f956447},
+      {0x8edf98b59a373fec, 0x4724bd4189bd5eac},
+      {0xb2977ee300c50fe7, 0x58edec91ec2cb657},
+      {0xdf3d5e9bc0f653e1, 0x2f2967b66737e3ed},
+      {0x8b865b215899f46c, 0xbd79e0d20082ee74},
+      {0xae67f1e9aec07187, 0xecd8590680a3aa11},
+      {0xda01ee641a708de9, 0xe80e6f4820cc9495},
+      {0x884134fe908658b2, 0x3109058d147fdcdd},
+      {0xaa51823e34a7eede, 0xbd4b46f0599fd415},
+      {0xd4e5e2cdc1d1ea96, 0x6c9e18ac7007c91a},
+      {0x850fadc09923329e, 0x03e2cf6bc604ddb0},
+      {0xa6539930bf6bff45, 0x84db8346b786151c},
+      {0xcfe87f7cef46ff16, 0xe612641865679a63},
+      {0x81f14fae158c5f6e, 0x4fcb7e8f3f60c07e},
+      {0xa26da3999aef7749, 0xe3be5e330f38f09d},
+      {0xcb090c8001ab551c, 0x5cadf5bfd3072cc5},
+      {0xfdcb4fa002162a63, 0x73d9732fc7c8f7f6},
+      {0x9e9f11c4014dda7e, 0x2867e7fddcdd9afa},
+      {0xc646d63501a1511d, 0xb281e1fd541501b8},
+      {0xf7d88bc24209a565, 0x1f225a7ca91a4226},
+      {0x9ae757596946075f, 0x3375788de9b06958},
+      {0xc1a12d2fc3978937, 0x0052d6b1641c83ae},
+      {0xf209787bb47d6b84, 0xc0678c5dbd23a49a},
+      {0x9745eb4d50ce6332, 0xf840b7ba963646e0},
+      {0xbd176620a501fbff, 0xb650e5a93bc3d898},
+      {0xec5d3fa8ce427aff, 0xa3e51f138ab4cebe},
+      {0x93ba47c980e98cdf, 0xc66f336c36b10137},
+      {0xb8a8d9bbe123f017, 0xb80b0047445d4184},
+      {0xe6d3102ad96cec1d, 0xa60dc059157491e5},
+      {0x9043ea1ac7e41392, 0x87c89837ad68db2f},
+      {0xb454e4a179dd1877, 0x29babe4598c311fb},
+      {0xe16a1dc9d8545e94, 0xf4296dd6fef3d67a},
+      {0x8ce2529e2734bb1d, 0x1899e4a65f58660c},
+      {0xb01ae745b101e9e4, 0x5ec05dcff72e7f8f},
+      {0xdc21a1171d42645d, 0x76707543f4fa1f73},
+      {0x899504ae72497eba, 0x6a06494a791c53a8},
+      {0xabfa45da0edbde69, 0x0487db9d17636892},
+      {0xd6f8d7509292d603, 0x45a9d2845d3c42b6},
+      {0x865b86925b9bc5c2, 0x0b8a2392ba45a9b2},
+      {0xa7f26836f282b732, 0x8e6cac7768d7141e},
+      {0xd1ef0244af2364ff, 0x3207d795430cd926},
+      {0x8335616aed761f1f, 0x7f44e6bd49e807b8},
+      {0xa402b9c5a8d3a6e7, 0x5f16206c9c6209a6},
+      {0xcd036837130890a1, 0x36dba887c37a8c0f},
+      {0x802221226be55a64, 0xc2494954da2c9789},
+      {0xa02aa96b06deb0fd, 0xf2db9baa10b7bd6c},
+      {0xc83553c5c8965d3d, 0x6f92829494e5acc7},
+      {0xfa42a8b73abbf48c, 0xcb772339ba1f17f9},
+      {0x9c69a97284b578d7, 0xff2a760414536efb},
+      {0xc38413cf25e2d70d, 0xfef5138519684aba},
+      {0xf46518c2ef5b8cd1, 0x7eb258665fc25d69},
+      {0x98bf2f79d5993802, 0xef2f773ffbd97a61},
+      {0xbeeefb584aff8603, 0xaafb550ffacfd8fa},
+      {0xeeaaba2e5dbf6784, 0x95ba2a53f983cf38},
+      {0x952ab45cfa97a0b2, 0xdd945a747bf26183},
+      {0xba756174393d88df, 0x94f971119aeef9e4},
+      {0xe912b9d1478ceb17, 0x7a37cd5601aab85d},
+      {0x91abb422ccb812ee, 0xac62e055c10ab33a},
+      {0xb616a12b7fe617aa, 0x577b986b314d6009},
+      {0xe39c49765fdf9d94, 0xed5a7e85fda0b80b},
+      {0x8e41ade9fbebc27d, 0x14588f13be847307},
+      {0xb1d219647ae6b31c, 0x596eb2d8ae258fc8},
+      {0xde469fbd99a05fe3, 0x6fca5f8ed9aef3bb},
+      {0x8aec23d680043bee, 0x25de7bb9480d5854},
+      {0xada72ccc20054ae9, 0xaf561aa79a10ae6a},
+      {0xd910f7ff28069da4, 0x1b2ba1518094da04},
+      {0x87aa9aff79042286, 0x90fb44d2f05d0842},
+      {0xa99541bf57452b28, 0x353a1607ac744a53},
+      {0xd3fa922f2d1675f2, 0x42889b8997915ce8},
+      {0x847c9b5d7c2e09b7, 0x69956135febada11},
+      {0xa59bc234db398c25, 0x43fab9837e699095},
+      {0xcf02b2c21207ef2e, 0x94f967e45e03f4bb},
+      {0x8161afb94b44f57d, 0x1d1be0eebac278f5},
+      {0xa1ba1ba79e1632dc, 0x6462d92a69731732},
+      {0xca28a291859bbf93, 0x7d7b8f7503cfdcfe},
+      {0xfcb2cb35e702af78, 0x5cda735244c3d43e},
+      {0x9defbf01b061adab, 0x3a0888136afa64a7},
+      {0xc56baec21c7a1916, 0x088aaa1845b8fdd0},
+      {0xf6c69a72a3989f5b, 0x8aad549e57273d45},
+      {0x9a3c2087a63f6399, 0x36ac54e2f678864b},
+      {0xc0cb28a98fcf3c7f, 0x84576a1bb416a7dd},
+      {0xf0fdf2d3f3c30b9f, 0x656d44a2a11c51d5},
+      {0x969eb7c47859e743, 0x9f644ae5a4b1b325},
+      {0xbc4665b596706114, 0x873d5d9f0dde1fee},
+      {0xeb57ff22fc0c7959, 0xa90cb506d155a7ea},
+      {0x9316ff75dd87cbd8, 0x09a7f12442d588f2},
+      {0xb7dcbf5354e9bece, 0x0c11ed6d538aeb2f},
+      {0xe5d3ef282a242e81, 0x8f1668c8a86da5fa},
+      {0x8fa475791a569d10, 0xf96e017d694487bc},
+      {0xb38d92d760ec4455, 0x37c981dcc395a9ac},
+      {0xe070f78d3927556a, 0x85bbe253f47b1417},
+      {0x8c469ab843b89562, 0x93956d7478ccec8e},
+      {0xaf58416654a6babb, 0x387ac8d1970027b2},
+      {0xdb2e51bfe9d0696a, 0x06997b05fcc0319e},
+      {0x88fcf317f22241e2, 0x441fece3bdf81f03},
+      {0xab3c2fddeeaad25a, 0xd527e81cad7626c3},
+      {0xd60b3bd56a5586f1, 0x8a71e223d8d3b074},
+      {0x85c7056562757456, 0xf6872d5667844e49},
+      {0xa738c6bebb12d16c, 0xb428f8ac016561db},
+      {0xd106f86e69d785c7, 0xe13336d701beba52},
+      {0x82a45b450226b39c, 0xecc0024661173473},
+      {0xa34d721642b06084, 0x27f002d7f95d0190},
+      {0xcc20ce9bd35c78a5, 0x31ec038df7b441f4},
+      {0xff290242c83396ce, 0x7e67047175a15271},
+      {0x9f79a169bd203e41, 0x0f0062c6e984d386},
+      {0xc75809c42c684dd1, 0x52c07b78a3e60868},
+      {0xf92e0c3537826145, 0xa7709a56ccdf8a82},
+      {0x9bbcc7a142b17ccb, 0x88a66076400bb691},
+      {0xc2abf989935ddbfe, 0x6acff893d00ea435},
+      {0xf356f7ebf83552fe, 0x0583f6b8c4124d43},
+      {0x98165af37b2153de, 0xc3727a337a8b704a},
+      {0xbe1bf1b059e9a8d6, 0x744f18c0592e4c5c},
+      {0xeda2ee1c7064130c, 0x1162def06f79df73},
+      {0x9485d4d1c63e8be7, 0x8addcb5645ac2ba8},
+      {0xb9a74a0637ce2ee1, 0x6d953e2bd7173692},
+      {0xe8111c87c5c1ba99, 0xc8fa8db6ccdd0437},
+      {0x910ab1d4db9914a0, 0x1d9c9892400a22a2},
+      {0xb54d5e4a127f59c8, 0x2503beb6d00cab4b},
+      {0xe2a0b5dc971f303a, 0x2e44ae64840fd61d},
+      {0x8da471a9de737e24, 0x5ceaecfed289e5d2},
+      {0xb10d8e1456105dad, 0x7425a83e872c5f47},
+      {0xdd50f1996b947518, 0xd12f124e28f77719},
+      {0x8a5296ffe33cc92f, 0x82bd6b70d99aaa6f},
+      {0xace73cbfdc0bfb7b, 0x636cc64d1001550b},
+      {0xd8210befd30efa5a, 0x3c47f7e05401aa4e},
+      {0x8714a775e3e95c78, 0x65acfaec34810a71},
+      {0xa8d9d1535ce3b396, 0x7f1839a741a14d0d},
+      {0xd31045a8341ca07c, 0x1ede48111209a050},
+      {0x83ea2b892091e44d, 0x934aed0aab460432},
+      {0xa4e4b66b68b65d60, 0xf81da84d5617853f},
+      {0xce1de40642e3f4b9, 0x36251260ab9d668e},
+      {0x80d2ae83e9ce78f3, 0xc1d72b7c6b426019},
+      {0xa1075a24e4421730, 0xb24cf65b8612f81f},
+      {0xc94930ae1d529cfc, 0xdee033f26797b627},
+      {0xfb9b7cd9a4a7443c, 0x169840ef017da3b1},
+      {0x9d412e0806e88aa5, 0x8e1f289560ee864e},
+      {0xc491798a08a2ad4e, 0xf1a6f2bab92a27e2},
+      {0xf5b5d7ec8acb58a2, 0xae10af696774b1db},
+      {0x9991a6f3d6bf1765, 0xacca6da1e0a8ef29},
+      {0xbff610b0cc6edd3f, 0x17fd090a58d32af3},
+      {0xeff394dcff8a948e, 0xddfc4b4cef07f5b0},
+      {0x95f83d0a1fb69cd9, 0x4abdaf101564f98e},
+      {0xbb764c4ca7a4440f, 0x9d6d1ad41abe37f1},
+      {0xea53df5fd18d5513, 0x84c86189216dc5ed},
+      {0x92746b9be2f8552c, 0x32fd3cf5b4e49bb4},
+      {0xb7118682dbb66a77, 0x3fbc8c33221dc2a1},
+      {0xe4d5e82392a40515, 0x0fabaf3feaa5334a},
+      {0x8f05b1163ba6832d, 0x29cb4d87f2a7400e},
+      {0xb2c71d5bca9023f8, 0x743e20e9ef511012},
+      {0xdf78e4b2bd342cf6, 0x914da9246b255416},
+      {0x8bab8eefb6409c1a, 0x1ad089b6c2f7548e},
+      {0xae9672aba3d0c320, 0xa184ac2473b529b1},
+      {0xda3c0f568cc4f3e8, 0xc9e5d72d90a2741e},
+      {0x8865899617fb1871, 0x7e2fa67c7a658892},
+      {0xaa7eebfb9df9de8d, 0xddbb901b98feeab7},
+      {0xd51ea6fa85785631, 0x552a74227f3ea565},
+      {0x8533285c936b35de, 0xd53a88958f87275f},
+      {0xa67ff273b8460356, 0x8a892abaf368f137},
+      {0xd01fef10a657842c, 0x2d2b7569b0432d85},
+      {0x8213f56a67f6b29b, 0x9c3b29620e29fc73},
+      {0xa298f2c501f45f42, 0x8349f3ba91b47b8f},
+      {0xcb3f2f7642717713, 0x241c70a936219a73},
+      {0xfe0efb53d30dd4d7, 0xed238cd383aa0110},
+      {0x9ec95d1463e8a506, 0xf4363804324a40aa},
+      {0xc67bb4597ce2ce48, 0xb143c6053edcd0d5},
+      {0xf81aa16fdc1b81da, 0xdd94b7868e94050a},
+      {0x9b10a4e5e9913128, 0xca7cf2b4191c8326},
+      {0xc1d4ce1f63f57d72, 0xfd1c2f611f63a3f0},
+      {0xf24a01a73cf2dccf, 0xbc633b39673c8cec},
+      {0x976e41088617ca01, 0xd5be0503e085d813},
+      {0xbd49d14aa79dbc82, 0x4b2d8644d8a74e18},
+      {0xec9c459d51852ba2, 0xddf8e7d60ed1219e},
+      {0x93e1ab8252f33b45, 0xcabb90e5c942b503},
+      {0xb8da1662e7b00a17, 0x3d6a751f3b936243},
+      {0xe7109bfba19c0c9d, 0x0cc512670a783ad4},
+      {0x906a617d450187e2, 0x27fb2b80668b24c5},
+      {0xb484f9dc9641e9da, 0xb1f9f660802dedf6},
+      {0xe1a63853bbd26451, 0x5e7873f8a0396973},
+      {0x8d07e33455637eb2, 0xdb0b487b6423e1e8},
+      {0xb049dc016abc5e5f, 0x91ce1a9a3d2cda62},
+      {0xdc5c5301c56b75f7, 0x7641a140cc7810fb},
+      {0x89b9b3e11b6329ba, 0xa9e904c87fcb0a9d},
+      {0xac2820d9623bf429, 0x546345fa9fbdcd44},
+      {0xd732290fbacaf133, 0xa97c177947ad4095},
+      {0x867f59a9d4bed6c0, 0x49ed8eabcccc485d},
+      {0xa81f301449ee8c70, 0x5c68f256bfff5a74},
+      {0xd226fc195c6a2f8c, 0x73832eec6fff3111},
+      {0x83585d8fd9c25db7, 0xc831fd53c5ff7eab},
+      {0xa42e74f3d032f525, 0xba3e7ca8b77f5e55},
+      {0xcd3a1230c43fb26f, 0x28ce1bd2e55f35eb},
+      {0x80444b5e7aa7cf85, 0x7980d163cf5b81b3},
+      {0xa0555e361951c366, 0xd7e105bcc332621f},
+      {0xc86ab5c39fa63440, 0x8dd9472bf3fefaa7},
+      {0xfa856334878fc150, 0xb14f98f6f0feb951},
+      {0x9c935e00d4b9d8d2, 0x6ed1bf9a569f33d3},
+      {0xc3b8358109e84f07, 0x0a862f80ec4700c8},
+      {0xf4a642e14c6262c8, 0xcd27bb612758c0fa},
+      {0x98e7e9cccfbd7dbd, 0x8038d51cb897789c},
+      {0xbf21e44003acdd2c, 0xe0470a63e6bd56c3},
+      {0xeeea5d5004981478, 0x1858ccfce06cac74},
+      {0x95527a5202df0ccb, 0x0f37801e0c43ebc8},
+      {0xbaa718e68396cffd, 0xd30560258f54e6ba},
+      {0xe950df20247c83fd, 0x47c6b82ef32a2069},
+      {0x91d28b7416cdd27e, 0x4cdc331d57fa5441},
+      {0xb6472e511c81471d, 0xe0133fe4adf8e952},
+      {0xe3d8f9e563a198e5, 0x58180fddd97723a6},
+      {0x8e679c2f5e44ff8f, 0x570f09eaa7ea7648},
+      {0xb201833b35d63f73, 0x2cd2cc6551e513da},
+      {0xde81e40a034bcf4f, 0xf8077f7ea65e58d1},
+      {0x8b112e86420f6191, 0xfb04afaf27faf782},
+      {0xadd57a27d29339f6, 0x79c5db9af1f9b563},
+      {0xd94ad8b1c7380874, 0x18375281ae7822bc},
+      {0x87cec76f1c830548, 0x8f2293910d0b15b5},
+      {0xa9c2794ae3a3c69a, 0xb2eb3875504ddb22},
+      {0xd433179d9c8cb841, 0x5fa60692a46151eb},
+      {0x849feec281d7f328, 0xdbc7c41ba6bcd333},
+      {0xa5c7ea73224deff3, 0x12b9b522906c0800},
+      {0xcf39e50feae16bef, 0xd768226b34870a00},
+      {0x81842f29f2cce375, 0xe6a1158300d46640},
+      {0xa1e53af46f801c53, 0x60495ae3c1097fd0},
+      {0xca5e89b18b602368, 0x385bb19cb14bdfc4},
+      {0xfcf62c1dee382c42, 0x46729e03dd9ed7b5},
+      {0x9e19db92b4e31ba9, 0x6c07a2c26a8346d1},
+      {0xc5a05277621be293, 0xc7098b7305241885},
+      { 0xf70867153aa2db38,
+        0xb8cbee4fc66d1ea7 }
+#else
+      {0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
+      {0xce5d73ff402d98e3, 0xfb0a3d212dc81290},
+      {0xa6b34ad8c9dfc06f, 0xf42faa48c0ea481f},
+      {0x86a8d39ef77164bc, 0xae5dff9c02033198},
+      {0xd98ddaee19068c76, 0x3badd624dd9b0958},
+      {0xafbd2350644eeacf, 0xe5d1929ef90898fb},
+      {0x8df5efabc5979c8f, 0xca8d3ffa1ef463c2},
+      {0xe55990879ddcaabd, 0xcc420a6a101d0516},
+      {0xb94470938fa89bce, 0xf808e40e8d5b3e6a},
+      {0x95a8637627989aad, 0xdde7001379a44aa9},
+      {0xf1c90080baf72cb1, 0x5324c68b12dd6339},
+      {0xc350000000000000, 0x0000000000000000},
+      {0x9dc5ada82b70b59d, 0xf020000000000000},
+      {0xfee50b7025c36a08, 0x02f236d04753d5b4},
+      {0xcde6fd5e09abcf26, 0xed4c0226b55e6f86},
+      {0xa6539930bf6bff45, 0x84db8346b786151c},
+      {0x865b86925b9bc5c2, 0x0b8a2392ba45a9b2},
+      {0xd910f7ff28069da4, 0x1b2ba1518094da04},
+      {0xaf58416654a6babb, 0x387ac8d1970027b2},
+      {0x8da471a9de737e24, 0x5ceaecfed289e5d2},
+      {0xe4d5e82392a40515, 0x0fabaf3feaa5334a},
+      {0xb8da1662e7b00a17, 0x3d6a751f3b936243},
+      { 0x95527a5202df0ccb,
+        0x0f37801e0c43ebc8 }
+#endif
+    };
+
+#if FMT_USE_FULL_CACHE_DRAGONBOX
+    return pow10_significands[k - float_info<double>::min_k];
+#else
+    static constexpr const uint64_t powers_of_5_64[] = {
+        0x0000000000000001, 0x0000000000000005, 0x0000000000000019,
+        0x000000000000007d, 0x0000000000000271, 0x0000000000000c35,
+        0x0000000000003d09, 0x000000000001312d, 0x000000000005f5e1,
+        0x00000000001dcd65, 0x00000000009502f9, 0x0000000002e90edd,
+        0x000000000e8d4a51, 0x0000000048c27395, 0x000000016bcc41e9,
+        0x000000071afd498d, 0x0000002386f26fc1, 0x000000b1a2bc2ec5,
+        0x000003782dace9d9, 0x00001158e460913d, 0x000056bc75e2d631,
+        0x0001b1ae4d6e2ef5, 0x000878678326eac9, 0x002a5a058fc295ed,
+        0x00d3c21bcecceda1, 0x0422ca8b0a00a425, 0x14adf4b7320334b9};
+
+    static constexpr const uint32_t pow10_recovery_errors[] = {
+        0x50001400, 0x54044100, 0x54014555, 0x55954415, 0x54115555, 0x00000001,
+        0x50000000, 0x00104000, 0x54010004, 0x05004001, 0x55555544, 0x41545555,
+        0x54040551, 0x15445545, 0x51555514, 0x10000015, 0x00101100, 0x01100015,
+        0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x04450514, 0x45414110,
+        0x55555145, 0x50544050, 0x15040155, 0x11054140, 0x50111514, 0x11451454,
+        0x00400541, 0x00000000, 0x55555450, 0x10056551, 0x10054011, 0x55551014,
+        0x69514555, 0x05151109, 0x00155555};
+
+    static const int compression_ratio = 27;
+
+    // Compute base index.
+    int cache_index = (k - float_info<double>::min_k) / compression_ratio;
+    int kb = cache_index * compression_ratio + float_info<double>::min_k;
+    int offset = k - kb;
+
+    // Get base cache.
+    uint128_wrapper base_cache = pow10_significands[cache_index];
+    if (offset == 0) return base_cache;
+
+    // Compute the required amount of bit-shift.
+    int alpha = floor_log2_pow10(kb + offset) - floor_log2_pow10(kb) - offset;
+    FMT_ASSERT(alpha > 0 && alpha < 64, "shifting error detected");
+
+    // Try to recover the real cache.
+    uint64_t pow5 = powers_of_5_64[offset];
+    uint128_wrapper recovered_cache = umul128(base_cache.high(), pow5);
+    uint128_wrapper middle_low =
+        umul128(base_cache.low() - (kb < 0 ? 1u : 0u), pow5);
+
+    recovered_cache += middle_low.high();
+
+    uint64_t high_to_middle = recovered_cache.high() << (64 - alpha);
+    uint64_t middle_to_low = recovered_cache.low() << (64 - alpha);
+
+    recovered_cache =
+        uint128_wrapper{(recovered_cache.low() >> alpha) | high_to_middle,
+                        ((middle_low.low() >> alpha) | middle_to_low)};
+
+    if (kb < 0) recovered_cache += 1;
+
+    // Get error.
+    int error_idx = (k - float_info<double>::min_k) / 16;
+    uint32_t error = (pow10_recovery_errors[error_idx] >>
+                      ((k - float_info<double>::min_k) % 16) * 2) &
+                     0x3;
+
+    // Add the error back.
+    FMT_ASSERT(recovered_cache.low() + error >= recovered_cache.low(), "");
+    return {recovered_cache.high(), recovered_cache.low() + error};
+#endif
+  }
+
+  static carrier_uint compute_mul(carrier_uint u,
+                                  const cache_entry_type& cache) FMT_NOEXCEPT {
+    return umul192_upper64(u, cache);
+  }
+
+  static uint32_t compute_delta(cache_entry_type const& cache,
+                                int beta_minus_1) FMT_NOEXCEPT {
+    return static_cast<uint32_t>(cache.high() >> (64 - 1 - beta_minus_1));
+  }
+
+  static bool compute_mul_parity(carrier_uint two_f,
+                                 const cache_entry_type& cache,
+                                 int beta_minus_1) FMT_NOEXCEPT {
+    FMT_ASSERT(beta_minus_1 >= 1, "");
+    FMT_ASSERT(beta_minus_1 < 64, "");
+
+    return ((umul192_middle64(two_f, cache) >> (64 - beta_minus_1)) & 1) != 0;
+  }
+
+  static carrier_uint compute_left_endpoint_for_shorter_interval_case(
+      const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+    return (cache.high() -
+            (cache.high() >> (float_info<double>::significand_bits + 2))) >>
+           (64 - float_info<double>::significand_bits - 1 - beta_minus_1);
+  }
+
+  static carrier_uint compute_right_endpoint_for_shorter_interval_case(
+      const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+    return (cache.high() +
+            (cache.high() >> (float_info<double>::significand_bits + 1))) >>
+           (64 - float_info<double>::significand_bits - 1 - beta_minus_1);
+  }
+
+  static carrier_uint compute_round_up_for_shorter_interval_case(
+      const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+    return ((cache.high() >>
+             (64 - float_info<double>::significand_bits - 2 - beta_minus_1)) +
+            1) /
+           2;
+  }
+};
+
+// Various integer checks
+template <class T>
+bool is_left_endpoint_integer_shorter_interval(int exponent) FMT_NOEXCEPT {
+  return exponent >=
+             float_info<
+                 T>::case_shorter_interval_left_endpoint_lower_threshold &&
+         exponent <=
+             float_info<T>::case_shorter_interval_left_endpoint_upper_threshold;
+}
+template <class T>
+bool is_endpoint_integer(typename float_info<T>::carrier_uint two_f,
+                         int exponent, int minus_k) FMT_NOEXCEPT {
+  if (exponent < float_info<T>::case_fc_pm_half_lower_threshold) return false;
+  // For k >= 0.
+  if (exponent <= float_info<T>::case_fc_pm_half_upper_threshold) return true;
+  // For k < 0.
+  if (exponent > float_info<T>::divisibility_check_by_5_threshold) return false;
+  return divisible_by_power_of_5(two_f, minus_k);
+}
+
+template <class T>
+bool is_center_integer(typename float_info<T>::carrier_uint two_f, int exponent,
+                       int minus_k) FMT_NOEXCEPT {
+  // Exponent for 5 is negative.
+  if (exponent > float_info<T>::divisibility_check_by_5_threshold) return false;
+  if (exponent > float_info<T>::case_fc_upper_threshold)
+    return divisible_by_power_of_5(two_f, minus_k);
+  // Both exponents are nonnegative.
+  if (exponent >= float_info<T>::case_fc_lower_threshold) return true;
+  // Exponent for 2 is negative.
+  return divisible_by_power_of_2(two_f, minus_k - exponent + 1);
+}
+
+// Remove trailing zeros from n and return the number of zeros removed (float)
+FMT_INLINE int remove_trailing_zeros(uint32_t& n) FMT_NOEXCEPT {
+#ifdef FMT_BUILTIN_CTZ
+  int t = FMT_BUILTIN_CTZ(n);
+#else
+  int t = ctz(n);
+#endif
+  if (t > float_info<float>::max_trailing_zeros)
+    t = float_info<float>::max_trailing_zeros;
+
+  const uint32_t mod_inv1 = 0xcccccccd;
+  const uint32_t max_quotient1 = 0x33333333;
+  const uint32_t mod_inv2 = 0xc28f5c29;
+  const uint32_t max_quotient2 = 0x0a3d70a3;
+
+  int s = 0;
+  for (; s < t - 1; s += 2) {
+    if (n * mod_inv2 > max_quotient2) break;
+    n *= mod_inv2;
+  }
+  if (s < t && n * mod_inv1 <= max_quotient1) {
+    n *= mod_inv1;
+    ++s;
+  }
+  n >>= s;
+  return s;
+}
+
+// Removes trailing zeros and returns the number of zeros removed (double)
+FMT_INLINE int remove_trailing_zeros(uint64_t& n) FMT_NOEXCEPT {
+#ifdef FMT_BUILTIN_CTZLL
+  int t = FMT_BUILTIN_CTZLL(n);
+#else
+  int t = ctzll(n);
+#endif
+  if (t > float_info<double>::max_trailing_zeros)
+    t = float_info<double>::max_trailing_zeros;
+  // Divide by 10^8 and reduce to 32-bits
+  // Since ret_value.significand <= (2^64 - 1) / 1000 < 10^17,
+  // both of the quotient and the r should fit in 32-bits
+
+  const uint32_t mod_inv1 = 0xcccccccd;
+  const uint32_t max_quotient1 = 0x33333333;
+  const uint64_t mod_inv8 = 0xc767074b22e90e21;
+  const uint64_t max_quotient8 = 0x00002af31dc46118;
+
+  // If the number is divisible by 1'0000'0000, work with the quotient
+  if (t >= 8) {
+    auto quotient_candidate = n * mod_inv8;
+
+    if (quotient_candidate <= max_quotient8) {
+      auto quotient = static_cast<uint32_t>(quotient_candidate >> 8);
+
+      int s = 8;
+      for (; s < t; ++s) {
+        if (quotient * mod_inv1 > max_quotient1) break;
+        quotient *= mod_inv1;
+      }
+      quotient >>= (s - 8);
+      n = quotient;
+      return s;
+    }
+  }
+
+  // Otherwise, work with the remainder
+  auto quotient = static_cast<uint32_t>(n / 100000000);
+  auto remainder = static_cast<uint32_t>(n - 100000000 * quotient);
+
+  if (t == 0 || remainder * mod_inv1 > max_quotient1) {
+    return 0;
+  }
+  remainder *= mod_inv1;
+
+  if (t == 1 || remainder * mod_inv1 > max_quotient1) {
+    n = (remainder >> 1) + quotient * 10000000ull;
+    return 1;
+  }
+  remainder *= mod_inv1;
+
+  if (t == 2 || remainder * mod_inv1 > max_quotient1) {
+    n = (remainder >> 2) + quotient * 1000000ull;
+    return 2;
+  }
+  remainder *= mod_inv1;
+
+  if (t == 3 || remainder * mod_inv1 > max_quotient1) {
+    n = (remainder >> 3) + quotient * 100000ull;
+    return 3;
+  }
+  remainder *= mod_inv1;
+
+  if (t == 4 || remainder * mod_inv1 > max_quotient1) {
+    n = (remainder >> 4) + quotient * 10000ull;
+    return 4;
+  }
+  remainder *= mod_inv1;
+
+  if (t == 5 || remainder * mod_inv1 > max_quotient1) {
+    n = (remainder >> 5) + quotient * 1000ull;
+    return 5;
+  }
+  remainder *= mod_inv1;
+
+  if (t == 6 || remainder * mod_inv1 > max_quotient1) {
+    n = (remainder >> 6) + quotient * 100ull;
+    return 6;
+  }
+  remainder *= mod_inv1;
+
+  n = (remainder >> 7) + quotient * 10ull;
+  return 7;
+}
+
+// The main algorithm for shorter interval case
+template <class T>
+FMT_INLINE decimal_fp<T> shorter_interval_case(int exponent) FMT_NOEXCEPT {
+  decimal_fp<T> ret_value;
+  // Compute k and beta
+  const int minus_k = floor_log10_pow2_minus_log10_4_over_3(exponent);
+  const int beta_minus_1 = exponent + floor_log2_pow10(-minus_k);
+
+  // Compute xi and zi
+  using cache_entry_type = typename cache_accessor<T>::cache_entry_type;
+  const cache_entry_type cache = cache_accessor<T>::get_cached_power(-minus_k);
+
+  auto xi = cache_accessor<T>::compute_left_endpoint_for_shorter_interval_case(
+      cache, beta_minus_1);
+  auto zi = cache_accessor<T>::compute_right_endpoint_for_shorter_interval_case(
+      cache, beta_minus_1);
+
+  // If the left endpoint is not an integer, increase it
+  if (!is_left_endpoint_integer_shorter_interval<T>(exponent)) ++xi;
+
+  // Try bigger divisor
+  ret_value.significand = zi / 10;
+
+  // If succeed, remove trailing zeros if necessary and return
+  if (ret_value.significand * 10 >= xi) {
+    ret_value.exponent = minus_k + 1;
+    ret_value.exponent += remove_trailing_zeros(ret_value.significand);
+    return ret_value;
+  }
+
+  // Otherwise, compute the round-up of y
+  ret_value.significand =
+      cache_accessor<T>::compute_round_up_for_shorter_interval_case(
+          cache, beta_minus_1);
+  ret_value.exponent = minus_k;
+
+  // When tie occurs, choose one of them according to the rule
+  if (exponent >= float_info<T>::shorter_interval_tie_lower_threshold &&
+      exponent <= float_info<T>::shorter_interval_tie_upper_threshold) {
+    ret_value.significand = ret_value.significand % 2 == 0
+                                ? ret_value.significand
+                                : ret_value.significand - 1;
+  } else if (ret_value.significand < xi) {
+    ++ret_value.significand;
+  }
+  return ret_value;
+}
+
+template <typename T> decimal_fp<T> to_decimal(T x) FMT_NOEXCEPT {
+  // Step 1: integer promotion & Schubfach multiplier calculation.
+
+  using carrier_uint = typename float_info<T>::carrier_uint;
+  using cache_entry_type = typename cache_accessor<T>::cache_entry_type;
+  auto br = bit_cast<carrier_uint>(x);
+
+  // Extract significand bits and exponent bits.
+  const carrier_uint significand_mask =
+      (static_cast<carrier_uint>(1) << float_info<T>::significand_bits) - 1;
+  carrier_uint significand = (br & significand_mask);
+  int exponent = static_cast<int>((br & exponent_mask<T>()) >>
+                                  float_info<T>::significand_bits);
+
+  if (exponent != 0) {  // Check if normal.
+    exponent += float_info<T>::exponent_bias - float_info<T>::significand_bits;
+
+    // Shorter interval case; proceed like Schubfach.
+    if (significand == 0) return shorter_interval_case<T>(exponent);
+
+    significand |=
+        (static_cast<carrier_uint>(1) << float_info<T>::significand_bits);
+  } else {
+    // Subnormal case; the interval is always regular.
+    if (significand == 0) return {0, 0};
+    exponent = float_info<T>::min_exponent - float_info<T>::significand_bits;
+  }
+
+  const bool include_left_endpoint = (significand % 2 == 0);
+  const bool include_right_endpoint = include_left_endpoint;
+
+  // Compute k and beta.
+  const int minus_k = floor_log10_pow2(exponent) - float_info<T>::kappa;
+  const cache_entry_type cache = cache_accessor<T>::get_cached_power(-minus_k);
+  const int beta_minus_1 = exponent + floor_log2_pow10(-minus_k);
+
+  // Compute zi and deltai
+  // 10^kappa <= deltai < 10^(kappa + 1)
+  const uint32_t deltai = cache_accessor<T>::compute_delta(cache, beta_minus_1);
+  const carrier_uint two_fc = significand << 1;
+  const carrier_uint two_fr = two_fc | 1;
+  const carrier_uint zi =
+      cache_accessor<T>::compute_mul(two_fr << beta_minus_1, cache);
+
+  // Step 2: Try larger divisor; remove trailing zeros if necessary
+
+  // Using an upper bound on zi, we might be able to optimize the division
+  // better than the compiler; we are computing zi / big_divisor here
+  decimal_fp<T> ret_value;
+  ret_value.significand = divide_by_10_to_kappa_plus_1(zi);
+  uint32_t r = static_cast<uint32_t>(zi - float_info<T>::big_divisor *
+                                              ret_value.significand);
+
+  if (r > deltai) {
+    goto small_divisor_case_label;
+  } else if (r < deltai) {
+    // Exclude the right endpoint if necessary
+    if (r == 0 && !include_right_endpoint &&
+        is_endpoint_integer<T>(two_fr, exponent, minus_k)) {
+      --ret_value.significand;
+      r = float_info<T>::big_divisor;
+      goto small_divisor_case_label;
+    }
+  } else {
+    // r == deltai; compare fractional parts
+    // Check conditions in the order different from the paper
+    // to take advantage of short-circuiting
+    const carrier_uint two_fl = two_fc - 1;
+    if ((!include_left_endpoint ||
+         !is_endpoint_integer<T>(two_fl, exponent, minus_k)) &&
+        !cache_accessor<T>::compute_mul_parity(two_fl, cache, beta_minus_1)) {
+      goto small_divisor_case_label;
+    }
+  }
+  ret_value.exponent = minus_k + float_info<T>::kappa + 1;
+
+  // We may need to remove trailing zeros
+  ret_value.exponent += remove_trailing_zeros(ret_value.significand);
+  return ret_value;
+
+  // Step 3: Find the significand with the smaller divisor
+
+small_divisor_case_label:
+  ret_value.significand *= 10;
+  ret_value.exponent = minus_k + float_info<T>::kappa;
+
+  const uint32_t mask = (1u << float_info<T>::kappa) - 1;
+  auto dist = r - (deltai / 2) + (float_info<T>::small_divisor / 2);
+
+  // Is dist divisible by 2^kappa?
+  if ((dist & mask) == 0) {
+    const bool approx_y_parity =
+        ((dist ^ (float_info<T>::small_divisor / 2)) & 1) != 0;
+    dist >>= float_info<T>::kappa;
+
+    // Is dist divisible by 5^kappa?
+    if (check_divisibility_and_divide_by_pow5<float_info<T>::kappa>(dist)) {
+      ret_value.significand += dist;
+
+      // Check z^(f) >= epsilon^(f)
+      // We have either yi == zi - epsiloni or yi == (zi - epsiloni) - 1,
+      // where yi == zi - epsiloni if and only if z^(f) >= epsilon^(f)
+      // Since there are only 2 possibilities, we only need to care about the
+      // parity. Also, zi and r should have the same parity since the divisor
+      // is an even number
+      if (cache_accessor<T>::compute_mul_parity(two_fc, cache, beta_minus_1) !=
+          approx_y_parity) {
+        --ret_value.significand;
+      } else {
+        // If z^(f) >= epsilon^(f), we might have a tie
+        // when z^(f) == epsilon^(f), or equivalently, when y is an integer
+        if (is_center_integer<T>(two_fc, exponent, minus_k)) {
+          ret_value.significand = ret_value.significand % 2 == 0
+                                      ? ret_value.significand
+                                      : ret_value.significand - 1;
+        }
+      }
+    }
+    // Is dist not divisible by 5^kappa?
+    else {
+      ret_value.significand += dist;
+    }
+  }
+  // Is dist not divisible by 2^kappa?
+  else {
+    // Since we know dist is small, we might be able to optimize the division
+    // better than the compiler; we are computing dist / small_divisor here
+    ret_value.significand +=
+        small_division_by_pow10<float_info<T>::kappa>(dist);
+  }
+  return ret_value;
+}
+}  // namespace dragonbox
+
+// Formats a floating-point number using a variation of the Fixed-Precision
+// Positive Floating-Point Printout ((FPP)^2) algorithm by Steele & White:
+// https://fmt.dev/papers/p372-steele.pdf.
+FMT_CONSTEXPR20 inline void format_dragon(fp value, bool is_predecessor_closer,
+                                          int num_digits, buffer<char>& buf,
+                                          int& exp10) {
+  bigint numerator;    // 2 * R in (FPP)^2.
+  bigint denominator;  // 2 * S in (FPP)^2.
+  // lower and upper are differences between value and corresponding boundaries.
+  bigint lower;             // (M^- in (FPP)^2).
+  bigint upper_store;       // upper's value if different from lower.
+  bigint* upper = nullptr;  // (M^+ in (FPP)^2).
+  // Shift numerator and denominator by an extra bit or two (if lower boundary
+  // is closer) to make lower and upper integers. This eliminates multiplication
+  // by 2 during later computations.
+  int shift = is_predecessor_closer ? 2 : 1;
+  uint64_t significand = value.f << shift;
+  if (value.e >= 0) {
+    numerator.assign(significand);
+    numerator <<= value.e;
+    lower.assign(1);
+    lower <<= value.e;
+    if (shift != 1) {
+      upper_store.assign(1);
+      upper_store <<= value.e + 1;
+      upper = &upper_store;
+    }
+    denominator.assign_pow10(exp10);
+    denominator <<= shift;
+  } else if (exp10 < 0) {
+    numerator.assign_pow10(-exp10);
+    lower.assign(numerator);
+    if (shift != 1) {
+      upper_store.assign(numerator);
+      upper_store <<= 1;
+      upper = &upper_store;
+    }
+    numerator *= significand;
+    denominator.assign(1);
+    denominator <<= shift - value.e;
+  } else {
+    numerator.assign(significand);
+    denominator.assign_pow10(exp10);
+    denominator <<= shift - value.e;
+    lower.assign(1);
+    if (shift != 1) {
+      upper_store.assign(1ULL << 1);
+      upper = &upper_store;
+    }
+  }
+  // Invariant: value == (numerator / denominator) * pow(10, exp10).
+  if (num_digits < 0) {
+    // Generate the shortest representation.
+    if (!upper) upper = &lower;
+    bool even = (value.f & 1) == 0;
+    num_digits = 0;
+    char* data = buf.data();
+    for (;;) {
+      int digit = numerator.divmod_assign(denominator);
+      bool low = compare(numerator, lower) - even < 0;  // numerator <[=] lower.
+      // numerator + upper >[=] pow10:
+      bool high = add_compare(numerator, *upper, denominator) + even > 0;
+      data[num_digits++] = static_cast<char>('0' + digit);
+      if (low || high) {
+        if (!low) {
+          ++data[num_digits - 1];
+        } else if (high) {
+          int result = add_compare(numerator, numerator, denominator);
+          // Round half to even.
+          if (result > 0 || (result == 0 && (digit % 2) != 0))
+            ++data[num_digits - 1];
+        }
+        buf.try_resize(to_unsigned(num_digits));
+        exp10 -= num_digits - 1;
+        return;
+      }
+      numerator *= 10;
+      lower *= 10;
+      if (upper != &lower) *upper *= 10;
+    }
+  }
+  // Generate the given number of digits.
+  exp10 -= num_digits - 1;
+  if (num_digits == 0) {
+    denominator *= 10;
+    auto digit = add_compare(numerator, numerator, denominator) > 0 ? '1' : '0';
+    buf.push_back(digit);
+    return;
+  }
+  buf.try_resize(to_unsigned(num_digits));
+  for (int i = 0; i < num_digits - 1; ++i) {
+    int digit = numerator.divmod_assign(denominator);
+    buf[i] = static_cast<char>('0' + digit);
+    numerator *= 10;
+  }
+  int digit = numerator.divmod_assign(denominator);
+  auto result = add_compare(numerator, numerator, denominator);
+  if (result > 0 || (result == 0 && (digit % 2) != 0)) {
+    if (digit == 9) {
+      const auto overflow = '0' + 10;
+      buf[num_digits - 1] = overflow;
+      // Propagate the carry.
+      for (int i = num_digits - 1; i > 0 && buf[i] == overflow; --i) {
+        buf[i] = '0';
+        ++buf[i - 1];
+      }
+      if (buf[0] == overflow) {
+        buf[0] = '1';
+        ++exp10;
+      }
+      return;
+    }
+    ++digit;
+  }
+  buf[num_digits - 1] = static_cast<char>('0' + digit);
+}
+
+template <typename Float>
+FMT_HEADER_ONLY_CONSTEXPR20 int format_float(Float value, int precision,
+                                             float_specs specs,
+                                             buffer<char>& buf) {
+  // float is passed as double to reduce the number of instantiations.
+  static_assert(!std::is_same<Float, float>::value, "");
+  FMT_ASSERT(value >= 0, "value is negative");
+
+  const bool fixed = specs.format == float_format::fixed;
+  if (value <= 0) {  // <= instead of == to silence a warning.
+    if (precision <= 0 || !fixed) {
+      buf.push_back('0');
+      return 0;
+    }
+    buf.try_resize(to_unsigned(precision));
+    fill_n(buf.data(), precision, '0');
+    return -precision;
+  }
+
+  if (specs.fallback) return snprintf_float(value, precision, specs, buf);
+
+  if (!is_constant_evaluated() && precision < 0) {
+    // Use Dragonbox for the shortest format.
+    if (specs.binary32) {
+      auto dec = dragonbox::to_decimal(static_cast<float>(value));
+      write<char>(buffer_appender<char>(buf), dec.significand);
+      return dec.exponent;
+    }
+    auto dec = dragonbox::to_decimal(static_cast<double>(value));
+    write<char>(buffer_appender<char>(buf), dec.significand);
+    return dec.exponent;
+  }
+
+  int exp = 0;
+  bool use_dragon = true;
+  if (is_fast_float<Float>()) {
+    // Use Grisu + Dragon4 for the given precision:
+    // https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf.
+    const int min_exp = -60;  // alpha in Grisu.
+    int cached_exp10 = 0;     // K in Grisu.
+    fp normalized = normalize(fp(value));
+    const auto cached_pow = get_cached_power(
+        min_exp - (normalized.e + fp::num_significand_bits), cached_exp10);
+    normalized = normalized * cached_pow;
+    gen_digits_handler handler{buf.data(), 0, precision, -cached_exp10, fixed};
+    if (grisu_gen_digits(normalized, 1, exp, handler) != digits::error &&
+        !is_constant_evaluated()) {
+      exp += handler.exp10;
+      buf.try_resize(to_unsigned(handler.size));
+      use_dragon = false;
+    } else {
+      exp += handler.size - cached_exp10 - 1;
+      precision = handler.precision;
+    }
+  }
+  if (use_dragon) {
+    auto f = fp();
+    bool is_predecessor_closer =
+        specs.binary32 ? f.assign(static_cast<float>(value)) : f.assign(value);
+    // Limit precision to the maximum possible number of significant digits in
+    // an IEEE754 double because we don't need to generate zeros.
+    const int max_double_digits = 767;
+    if (precision > max_double_digits) precision = max_double_digits;
+    format_dragon(f, is_predecessor_closer, precision, buf, exp);
+  }
+  if (!fixed && !specs.showpoint) {
+    // Remove trailing zeros.
+    auto num_digits = buf.size();
+    while (num_digits > 0 && buf[num_digits - 1] == '0') {
+      --num_digits;
+      ++exp;
+    }
+    buf.try_resize(num_digits);
+  }
+  return exp;
+}
+
+template <typename T>
+int snprintf_float(T value, int precision, float_specs specs,
+                   buffer<char>& buf) {
+  // Buffer capacity must be non-zero, otherwise MSVC's vsnprintf_s will fail.
+  FMT_ASSERT(buf.capacity() > buf.size(), "empty buffer");
+  static_assert(!std::is_same<T, float>::value, "");
+
+  // Subtract 1 to account for the difference in precision since we use %e for
+  // both general and exponent format.
+  if (specs.format == float_format::general ||
+      specs.format == float_format::exp)
+    precision = (precision >= 0 ? precision : 6) - 1;
+
+  // Build the format string.
+  enum { max_format_size = 7 };  // The longest format is "%#.*Le".
+  char format[max_format_size];
+  char* format_ptr = format;
+  *format_ptr++ = '%';
+  if (specs.showpoint && specs.format == float_format::hex) *format_ptr++ = '#';
+  if (precision >= 0) {
+    *format_ptr++ = '.';
+    *format_ptr++ = '*';
+  }
+  if (std::is_same<T, long double>()) *format_ptr++ = 'L';
+  *format_ptr++ = specs.format != float_format::hex
+                      ? (specs.format == float_format::fixed ? 'f' : 'e')
+                      : (specs.upper ? 'A' : 'a');
+  *format_ptr = '\0';
+
+  // Format using snprintf.
+  auto offset = buf.size();
+  for (;;) {
+    auto begin = buf.data() + offset;
+    auto capacity = buf.capacity() - offset;
+#ifdef FMT_FUZZ
+    if (precision > 100000)
+      throw std::runtime_error(
+          "fuzz mode - avoid large allocation inside snprintf");
+#endif
+    // Suppress the warning about a nonliteral format string.
+    // Cannot use auto because of a bug in MinGW (#1532).
+    int (*snprintf_ptr)(char*, size_t, const char*, ...) = FMT_SNPRINTF;
+    int result = precision >= 0
+                     ? snprintf_ptr(begin, capacity, format, precision, value)
+                     : snprintf_ptr(begin, capacity, format, value);
+    if (result < 0) {
+      // The buffer will grow exponentially.
+      buf.try_reserve(buf.capacity() + 1);
+      continue;
+    }
+    auto size = to_unsigned(result);
+    // Size equal to capacity means that the last character was truncated.
+    if (size >= capacity) {
+      buf.try_reserve(size + offset + 1);  // Add 1 for the terminating '\0'.
+      continue;
+    }
+    auto is_digit = [](char c) { return c >= '0' && c <= '9'; };
+    if (specs.format == float_format::fixed) {
+      if (precision == 0) {
+        buf.try_resize(size);
+        return 0;
+      }
+      // Find and remove the decimal point.
+      auto end = begin + size, p = end;
+      do {
+        --p;
+      } while (is_digit(*p));
+      int fraction_size = static_cast<int>(end - p - 1);
+      std::memmove(p, p + 1, to_unsigned(fraction_size));
+      buf.try_resize(size - 1);
+      return -fraction_size;
+    }
+    if (specs.format == float_format::hex) {
+      buf.try_resize(size + offset);
+      return 0;
+    }
+    // Find and parse the exponent.
+    auto end = begin + size, exp_pos = end;
+    do {
+      --exp_pos;
+    } while (*exp_pos != 'e');
+    char sign = exp_pos[1];
+    FMT_ASSERT(sign == '+' || sign == '-', "");
+    int exp = 0;
+    auto p = exp_pos + 2;  // Skip 'e' and sign.
+    do {
+      FMT_ASSERT(is_digit(*p), "");
+      exp = exp * 10 + (*p++ - '0');
+    } while (p != end);
+    if (sign == '-') exp = -exp;
+    int fraction_size = 0;
+    if (exp_pos != begin + 1) {
+      // Remove trailing zeros.
+      auto fraction_end = exp_pos - 1;
+      while (*fraction_end == '0') --fraction_end;
+      // Move the fractional part left to get rid of the decimal point.
+      fraction_size = static_cast<int>(fraction_end - begin - 1);
+      std::memmove(begin + 1, begin + 2, to_unsigned(fraction_size));
+    }
+    buf.try_resize(to_unsigned(fraction_size) + offset + 1);
+    return exp - fraction_size;
+  }
+}
+}  // namespace detail
+
+template <> struct formatter<detail::bigint> {
+  FMT_CONSTEXPR format_parse_context::iterator parse(
+      format_parse_context& ctx) {
+    return ctx.begin();
+  }
+
+  format_context::iterator format(const detail::bigint& n,
+                                  format_context& ctx) {
+    auto out = ctx.out();
+    bool first = true;
+    for (auto i = n.bigits_.size(); i > 0; --i) {
+      auto value = n.bigits_[i - 1u];
+      if (first) {
+        out = format_to(out, FMT_STRING("{:x}"), value);
+        first = false;
+        continue;
+      }
+      out = format_to(out, FMT_STRING("{:08x}"), value);
+    }
+    if (n.exp_ > 0)
+      out = format_to(out, FMT_STRING("p{}"),
+                      n.exp_ * detail::bigint::bigit_bits);
+    return out;
+  }
+};
+
+FMT_FUNC detail::utf8_to_utf16::utf8_to_utf16(string_view s) {
+  for_each_codepoint(s, [this](uint32_t cp, string_view) {
+    if (cp == invalid_code_point) FMT_THROW(std::runtime_error("invalid utf8"));
+    if (cp <= 0xFFFF) {
+      buffer_.push_back(static_cast<wchar_t>(cp));
+    } else {
+      cp -= 0x10000;
+      buffer_.push_back(static_cast<wchar_t>(0xD800 + (cp >> 10)));
+      buffer_.push_back(static_cast<wchar_t>(0xDC00 + (cp & 0x3FF)));
+    }
+    return true;
+  });
+  buffer_.push_back(0);
+}
+
+FMT_FUNC void format_system_error(detail::buffer<char>& out, int error_code,
+                                  const char* message) FMT_NOEXCEPT {
+  FMT_TRY {
+    auto ec = std::error_code(error_code, std::generic_category());
+    write(std::back_inserter(out), std::system_error(ec, message).what());
+    return;
+  }
+  FMT_CATCH(...) {}
+  format_error_code(out, error_code, message);
+}
+
+FMT_FUNC void report_system_error(int error_code,
+                                  const char* message) FMT_NOEXCEPT {
+  report_error(format_system_error, error_code, message);
+}
+
+// DEPRECATED!
+// This function is defined here and not inline for ABI compatiblity.
+FMT_FUNC void detail::error_handler::on_error(const char* message) {
+  throw_format_error(message);
+}
+
+FMT_FUNC std::string vformat(string_view fmt, format_args args) {
+  // Don't optimize the "{}" case to keep the binary size small and because it
+  // can be better optimized in fmt::format anyway.
+  auto buffer = memory_buffer();
+  detail::vformat_to(buffer, fmt, args);
+  return to_string(buffer);
+}
+
+#ifdef _WIN32
+namespace detail {
+using dword = conditional_t<sizeof(long) == 4, unsigned long, unsigned>;
+extern "C" __declspec(dllimport) int __stdcall WriteConsoleW(  //
+    void*, const void*, dword, dword*, void*);
+}  // namespace detail
+#endif
+
+namespace detail {
+FMT_FUNC void print(std::FILE* f, string_view text) {
+#ifdef _WIN32
+  auto fd = _fileno(f);
+  if (_isatty(fd)) {
+    detail::utf8_to_utf16 u16(string_view(text.data(), text.size()));
+    auto written = detail::dword();
+    if (detail::WriteConsoleW(reinterpret_cast<void*>(_get_osfhandle(fd)),
+                              u16.c_str(), static_cast<uint32_t>(u16.size()),
+                              &written, nullptr)) {
+      return;
+    }
+    // Fallback to fwrite on failure. It can happen if the output has been
+    // redirected to NUL.
+  }
+#endif
+  detail::fwrite_fully(text.data(), 1, text.size(), f);
+}
+}  // namespace detail
+
+FMT_FUNC void vprint(std::FILE* f, string_view format_str, format_args args) {
+  memory_buffer buffer;
+  detail::vformat_to(buffer, format_str, args);
+  detail::print(f, {buffer.data(), buffer.size()});
+}
+
+#ifdef _WIN32
+// Print assuming legacy (non-Unicode) encoding.
+FMT_FUNC void detail::vprint_mojibake(std::FILE* f, string_view format_str,
+                                      format_args args) {
+  memory_buffer buffer;
+  detail::vformat_to(buffer, format_str,
+                     basic_format_args<buffer_context<char>>(args));
+  fwrite_fully(buffer.data(), 1, buffer.size(), f);
+}
+#endif
+
+FMT_FUNC void vprint(string_view format_str, format_args args) {
+  vprint(stdout, format_str, args);
+}
+
+FMT_END_NAMESPACE
+
+#endif  // FMT_FORMAT_INL_H_
diff --git a/3rdparty/fmt/include/fmt/format.h b/3rdparty/fmt/include/fmt/format.h
new file mode 100644
index 00000000..ee69651c
--- /dev/null
+++ b/3rdparty/fmt/include/fmt/format.h
@@ -0,0 +1,3104 @@
+/*
+ Formatting library for C++
+
+ Copyright (c) 2012 - present, Victor Zverovich
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+ --- Optional exception to the license ---
+
+ As an exception, if, as a result of your compiling your source code, portions
+ of this Software are embedded into a machine-executable object form of such
+ source code, you may redistribute such embedded portions in such object form
+ without including the above copyright and permission notices.
+ */
+
+#ifndef FMT_FORMAT_H_
+#define FMT_FORMAT_H_
+
+#include <cmath>         // std::signbit
+#include <cstdint>       // uint32_t
+#include <limits>        // std::numeric_limits
+#include <memory>        // std::uninitialized_copy
+#include <stdexcept>     // std::runtime_error
+#include <system_error>  // std::system_error
+#include <utility>       // std::swap
+
+#ifdef __cpp_lib_bit_cast
+#  include <bit>  // std::bitcast
+#endif
+
+#include "core.h"
+
+#if FMT_GCC_VERSION
+#  define FMT_GCC_VISIBILITY_HIDDEN __attribute__((visibility("hidden")))
+#else
+#  define FMT_GCC_VISIBILITY_HIDDEN
+#endif
+
+#ifdef __NVCC__
+#  define FMT_CUDA_VERSION (__CUDACC_VER_MAJOR__ * 100 + __CUDACC_VER_MINOR__)
+#else
+#  define FMT_CUDA_VERSION 0
+#endif
+
+#ifdef __has_builtin
+#  define FMT_HAS_BUILTIN(x) __has_builtin(x)
+#else
+#  define FMT_HAS_BUILTIN(x) 0
+#endif
+
+#if FMT_GCC_VERSION || FMT_CLANG_VERSION
+#  define FMT_NOINLINE __attribute__((noinline))
+#else
+#  define FMT_NOINLINE
+#endif
+
+#if FMT_MSC_VER
+#  define FMT_MSC_DEFAULT = default
+#else
+#  define FMT_MSC_DEFAULT
+#endif
+
+#ifndef FMT_THROW
+#  if FMT_EXCEPTIONS
+#    if FMT_MSC_VER || FMT_NVCC
+FMT_BEGIN_NAMESPACE
+namespace detail {
+template <typename Exception> inline void do_throw(const Exception& x) {
+  // Silence unreachable code warnings in MSVC and NVCC because these
+  // are nearly impossible to fix in a generic code.
+  volatile bool b = true;
+  if (b) throw x;
+}
+}  // namespace detail
+FMT_END_NAMESPACE
+#      define FMT_THROW(x) detail::do_throw(x)
+#    else
+#      define FMT_THROW(x) throw x
+#    endif
+#  else
+#    define FMT_THROW(x)               \
+      do {                             \
+        FMT_ASSERT(false, (x).what()); \
+      } while (false)
+#  endif
+#endif
+
+#if FMT_EXCEPTIONS
+#  define FMT_TRY try
+#  define FMT_CATCH(x) catch (x)
+#else
+#  define FMT_TRY if (true)
+#  define FMT_CATCH(x) if (false)
+#endif
+
+#ifndef FMT_MAYBE_UNUSED
+#  if FMT_HAS_CPP17_ATTRIBUTE(maybe_unused)
+#    define FMT_MAYBE_UNUSED [[maybe_unused]]
+#  else
+#    define FMT_MAYBE_UNUSED
+#  endif
+#endif
+
+// Workaround broken [[deprecated]] in the Intel, PGI and NVCC compilers.
+#if FMT_ICC_VERSION || defined(__PGI) || FMT_NVCC
+#  define FMT_DEPRECATED_ALIAS
+#else
+#  define FMT_DEPRECATED_ALIAS FMT_DEPRECATED
+#endif
+
+#ifndef FMT_USE_USER_DEFINED_LITERALS
+// EDG based compilers (Intel, NVIDIA, Elbrus, etc), GCC and MSVC support UDLs.
+#  if (FMT_HAS_FEATURE(cxx_user_literals) || FMT_GCC_VERSION >= 407 || \
+       FMT_MSC_VER >= 1900) &&                                         \
+      (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= /* UDL feature */ 480)
+#    define FMT_USE_USER_DEFINED_LITERALS 1
+#  else
+#    define FMT_USE_USER_DEFINED_LITERALS 0
+#  endif
+#endif
+
+// Defining FMT_REDUCE_INT_INSTANTIATIONS to 1, will reduce the number of
+// integer formatter template instantiations to just one by only using the
+// largest integer type. This results in a reduction in binary size but will
+// cause a decrease in integer formatting performance.
+#if !defined(FMT_REDUCE_INT_INSTANTIATIONS)
+#  define FMT_REDUCE_INT_INSTANTIATIONS 0
+#endif
+
+// __builtin_clz is broken in clang with Microsoft CodeGen:
+// https://github.com/fmtlib/fmt/issues/519.
+#if !FMT_MSC_VER
+#  if FMT_HAS_BUILTIN(__builtin_clz) || FMT_GCC_VERSION || FMT_ICC_VERSION
+#    define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
+#  endif
+#  if FMT_HAS_BUILTIN(__builtin_clzll) || FMT_GCC_VERSION || FMT_ICC_VERSION
+#    define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
+#  endif
+#endif
+
+// __builtin_ctz is broken in Intel Compiler Classic on Windows:
+// https://github.com/fmtlib/fmt/issues/2510.
+#ifndef __ICL
+#  if FMT_HAS_BUILTIN(__builtin_ctz) || FMT_GCC_VERSION || FMT_ICC_VERSION
+#    define FMT_BUILTIN_CTZ(n) __builtin_ctz(n)
+#  endif
+#  if FMT_HAS_BUILTIN(__builtin_ctzll) || FMT_GCC_VERSION || FMT_ICC_VERSION
+#    define FMT_BUILTIN_CTZLL(n) __builtin_ctzll(n)
+#  endif
+#endif
+
+#if FMT_MSC_VER
+#  include <intrin.h>  // _BitScanReverse[64], _BitScanForward[64], _umul128
+#endif
+
+// Some compilers masquerade as both MSVC and GCC-likes or otherwise support
+// __builtin_clz and __builtin_clzll, so only define FMT_BUILTIN_CLZ using the
+// MSVC intrinsics if the clz and clzll builtins are not available.
+#if FMT_MSC_VER && !defined(FMT_BUILTIN_CLZLL) && !defined(FMT_BUILTIN_CTZLL)
+FMT_BEGIN_NAMESPACE
+namespace detail {
+// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
+#  if !defined(__clang__)
+#    pragma intrinsic(_BitScanForward)
+#    pragma intrinsic(_BitScanReverse)
+#    if defined(_WIN64)
+#      pragma intrinsic(_BitScanForward64)
+#      pragma intrinsic(_BitScanReverse64)
+#    endif
+#  endif
+
+inline auto clz(uint32_t x) -> int {
+  unsigned long r = 0;
+  _BitScanReverse(&r, x);
+  FMT_ASSERT(x != 0, "");
+  // Static analysis complains about using uninitialized data
+  // "r", but the only way that can happen is if "x" is 0,
+  // which the callers guarantee to not happen.
+  FMT_MSC_WARNING(suppress : 6102)
+  return 31 ^ static_cast<int>(r);
+}
+#  define FMT_BUILTIN_CLZ(n) detail::clz(n)
+
+inline auto clzll(uint64_t x) -> int {
+  unsigned long r = 0;
+#  ifdef _WIN64
+  _BitScanReverse64(&r, x);
+#  else
+  // Scan the high 32 bits.
+  if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32))) return 63 ^ (r + 32);
+  // Scan the low 32 bits.
+  _BitScanReverse(&r, static_cast<uint32_t>(x));
+#  endif
+  FMT_ASSERT(x != 0, "");
+  FMT_MSC_WARNING(suppress : 6102)  // Suppress a bogus static analysis warning.
+  return 63 ^ static_cast<int>(r);
+}
+#  define FMT_BUILTIN_CLZLL(n) detail::clzll(n)
+
+inline auto ctz(uint32_t x) -> int {
+  unsigned long r = 0;
+  _BitScanForward(&r, x);
+  FMT_ASSERT(x != 0, "");
+  FMT_MSC_WARNING(suppress : 6102)  // Suppress a bogus static analysis warning.
+  return static_cast<int>(r);
+}
+#  define FMT_BUILTIN_CTZ(n) detail::ctz(n)
+
+inline auto ctzll(uint64_t x) -> int {
+  unsigned long r = 0;
+  FMT_ASSERT(x != 0, "");
+  FMT_MSC_WARNING(suppress : 6102)  // Suppress a bogus static analysis warning.
+#  ifdef _WIN64
+  _BitScanForward64(&r, x);
+#  else
+  // Scan the low 32 bits.
+  if (_BitScanForward(&r, static_cast<uint32_t>(x))) return static_cast<int>(r);
+  // Scan the high 32 bits.
+  _BitScanForward(&r, static_cast<uint32_t>(x >> 32));
+  r += 32;
+#  endif
+  return static_cast<int>(r);
+}
+#  define FMT_BUILTIN_CTZLL(n) detail::ctzll(n)
+}  // namespace detail
+FMT_END_NAMESPACE
+#endif
+
+#ifdef FMT_HEADER_ONLY
+#  define FMT_HEADER_ONLY_CONSTEXPR20 FMT_CONSTEXPR20
+#else
+#  define FMT_HEADER_ONLY_CONSTEXPR20
+#endif
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+template <typename Streambuf> class formatbuf : public Streambuf {
+ private:
+  using char_type = typename Streambuf::char_type;
+  using streamsize = decltype(std::declval<Streambuf>().sputn(nullptr, 0));
+  using int_type = typename Streambuf::int_type;
+  using traits_type = typename Streambuf::traits_type;
+
+  buffer<char_type>& buffer_;
+
+ public:
+  explicit formatbuf(buffer<char_type>& buf) : buffer_(buf) {}
+
+ protected:
+  // The put area is always empty. This makes the implementation simpler and has
+  // the advantage that the streambuf and the buffer are always in sync and
+  // sputc never writes into uninitialized memory. A disadvantage is that each
+  // call to sputc always results in a (virtual) call to overflow. There is no
+  // disadvantage here for sputn since this always results in a call to xsputn.
+
+  auto overflow(int_type ch) -> int_type override {
+    if (!traits_type::eq_int_type(ch, traits_type::eof()))
+      buffer_.push_back(static_cast<char_type>(ch));
+    return ch;
+  }
+
+  auto xsputn(const char_type* s, streamsize count) -> streamsize override {
+    buffer_.append(s, s + count);
+    return count;
+  }
+};
+
+// Implementation of std::bit_cast for pre-C++20.
+template <typename To, typename From>
+FMT_CONSTEXPR20 auto bit_cast(const From& from) -> To {
+  static_assert(sizeof(To) == sizeof(From), "size mismatch");
+#ifdef __cpp_lib_bit_cast
+  if (is_constant_evaluated()) return std::bit_cast<To>(from);
+#endif
+  auto to = To();
+  std::memcpy(&to, &from, sizeof(to));
+  return to;
+}
+
+inline auto is_big_endian() -> bool {
+#ifdef _WIN32
+  return false;
+#elif defined(__BIG_ENDIAN__)
+  return true;
+#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__)
+  return __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__;
+#else
+  struct bytes {
+    char data[sizeof(int)];
+  };
+  return bit_cast<bytes>(1).data[0] == 0;
+#endif
+}
+
+// A fallback implementation of uintptr_t for systems that lack it.
+struct fallback_uintptr {
+  unsigned char value[sizeof(void*)];
+
+  fallback_uintptr() = default;
+  explicit fallback_uintptr(const void* p) {
+    *this = bit_cast<fallback_uintptr>(p);
+    if (const_check(is_big_endian())) {
+      for (size_t i = 0, j = sizeof(void*) - 1; i < j; ++i, --j)
+        std::swap(value[i], value[j]);
+    }
+  }
+};
+#ifdef UINTPTR_MAX
+using uintptr_t = ::uintptr_t;
+inline auto to_uintptr(const void* p) -> uintptr_t {
+  return bit_cast<uintptr_t>(p);
+}
+#else
+using uintptr_t = fallback_uintptr;
+inline auto to_uintptr(const void* p) -> fallback_uintptr {
+  return fallback_uintptr(p);
+}
+#endif
+
+// Returns the largest possible value for type T. Same as
+// std::numeric_limits<T>::max() but shorter and not affected by the max macro.
+template <typename T> constexpr auto max_value() -> T {
+  return (std::numeric_limits<T>::max)();
+}
+template <typename T> constexpr auto num_bits() -> int {
+  return std::numeric_limits<T>::digits;
+}
+// std::numeric_limits<T>::digits may return 0 for 128-bit ints.
+template <> constexpr auto num_bits<int128_t>() -> int { return 128; }
+template <> constexpr auto num_bits<uint128_t>() -> int { return 128; }
+template <> constexpr auto num_bits<fallback_uintptr>() -> int {
+  return static_cast<int>(sizeof(void*) *
+                          std::numeric_limits<unsigned char>::digits);
+}
+
+FMT_INLINE void assume(bool condition) {
+  (void)condition;
+#if FMT_HAS_BUILTIN(__builtin_assume)
+  __builtin_assume(condition);
+#endif
+}
+
+// An approximation of iterator_t for pre-C++20 systems.
+template <typename T>
+using iterator_t = decltype(std::begin(std::declval<T&>()));
+template <typename T> using sentinel_t = decltype(std::end(std::declval<T&>()));
+
+// A workaround for std::string not having mutable data() until C++17.
+template <typename Char>
+inline auto get_data(std::basic_string<Char>& s) -> Char* {
+  return &s[0];
+}
+template <typename Container>
+inline auto get_data(Container& c) -> typename Container::value_type* {
+  return c.data();
+}
+
+#if defined(_SECURE_SCL) && _SECURE_SCL
+// Make a checked iterator to avoid MSVC warnings.
+template <typename T> using checked_ptr = stdext::checked_array_iterator<T*>;
+template <typename T>
+constexpr auto make_checked(T* p, size_t size) -> checked_ptr<T> {
+  return {p, size};
+}
+#else
+template <typename T> using checked_ptr = T*;
+template <typename T> constexpr auto make_checked(T* p, size_t) -> T* {
+  return p;
+}
+#endif
+
+// Attempts to reserve space for n extra characters in the output range.
+// Returns a pointer to the reserved range or a reference to it.
+template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
+#if FMT_CLANG_VERSION >= 307 && !FMT_ICC_VERSION
+__attribute__((no_sanitize("undefined")))
+#endif
+inline auto
+reserve(std::back_insert_iterator<Container> it, size_t n)
+    -> checked_ptr<typename Container::value_type> {
+  Container& c = get_container(it);
+  size_t size = c.size();
+  c.resize(size + n);
+  return make_checked(get_data(c) + size, n);
+}
+
+template <typename T>
+inline auto reserve(buffer_appender<T> it, size_t n) -> buffer_appender<T> {
+  buffer<T>& buf = get_container(it);
+  buf.try_reserve(buf.size() + n);
+  return it;
+}
+
+template <typename Iterator>
+constexpr auto reserve(Iterator& it, size_t) -> Iterator& {
+  return it;
+}
+
+template <typename OutputIt>
+using reserve_iterator =
+    remove_reference_t<decltype(reserve(std::declval<OutputIt&>(), 0))>;
+
+template <typename T, typename OutputIt>
+constexpr auto to_pointer(OutputIt, size_t) -> T* {
+  return nullptr;
+}
+template <typename T> auto to_pointer(buffer_appender<T> it, size_t n) -> T* {
+  buffer<T>& buf = get_container(it);
+  auto size = buf.size();
+  if (buf.capacity() < size + n) return nullptr;
+  buf.try_resize(size + n);
+  return buf.data() + size;
+}
+
+template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
+inline auto base_iterator(std::back_insert_iterator<Container>& it,
+                          checked_ptr<typename Container::value_type>)
+    -> std::back_insert_iterator<Container> {
+  return it;
+}
+
+template <typename Iterator>
+constexpr auto base_iterator(Iterator, Iterator it) -> Iterator {
+  return it;
+}
+
+// <algorithm> is spectacularly slow to compile in C++20 so use a simple fill_n
+// instead (#1998).
+template <typename OutputIt, typename Size, typename T>
+FMT_CONSTEXPR auto fill_n(OutputIt out, Size count, const T& value)
+    -> OutputIt {
+  for (Size i = 0; i < count; ++i) *out++ = value;
+  return out;
+}
+template <typename T, typename Size>
+FMT_CONSTEXPR20 auto fill_n(T* out, Size count, char value) -> T* {
+  if (is_constant_evaluated()) {
+    return fill_n<T*, Size, T>(out, count, value);
+  }
+  std::memset(out, value, to_unsigned(count));
+  return out + count;
+}
+
+#ifdef __cpp_char8_t
+using char8_type = char8_t;
+#else
+enum char8_type : unsigned char {};
+#endif
+
+template <typename OutChar, typename InputIt, typename OutputIt>
+FMT_CONSTEXPR FMT_NOINLINE auto copy_str_noinline(InputIt begin, InputIt end,
+                                                  OutputIt out) -> OutputIt {
+  return copy_str<OutChar>(begin, end, out);
+}
+
+// A public domain branchless UTF-8 decoder by Christopher Wellons:
+// https://github.com/skeeto/branchless-utf8
+/* Decode the next character, c, from s, reporting errors in e.
+ *
+ * Since this is a branchless decoder, four bytes will be read from the
+ * buffer regardless of the actual length of the next character. This
+ * means the buffer _must_ have at least three bytes of zero padding
+ * following the end of the data stream.
+ *
+ * Errors are reported in e, which will be non-zero if the parsed
+ * character was somehow invalid: invalid byte sequence, non-canonical
+ * encoding, or a surrogate half.
+ *
+ * The function returns a pointer to the next character. When an error
+ * occurs, this pointer will be a guess that depends on the particular
+ * error, but it will always advance at least one byte.
+ */
+FMT_CONSTEXPR inline auto utf8_decode(const char* s, uint32_t* c, int* e)
+    -> const char* {
+  constexpr const int masks[] = {0x00, 0x7f, 0x1f, 0x0f, 0x07};
+  constexpr const uint32_t mins[] = {4194304, 0, 128, 2048, 65536};
+  constexpr const int shiftc[] = {0, 18, 12, 6, 0};
+  constexpr const int shifte[] = {0, 6, 4, 2, 0};
+
+  int len = code_point_length(s);
+  const char* next = s + len;
+
+  // Assume a four-byte character and load four bytes. Unused bits are
+  // shifted out.
+  *c = uint32_t(s[0] & masks[len]) << 18;
+  *c |= uint32_t(s[1] & 0x3f) << 12;
+  *c |= uint32_t(s[2] & 0x3f) << 6;
+  *c |= uint32_t(s[3] & 0x3f) << 0;
+  *c >>= shiftc[len];
+
+  // Accumulate the various error conditions.
+  using uchar = unsigned char;
+  *e = (*c < mins[len]) << 6;       // non-canonical encoding
+  *e |= ((*c >> 11) == 0x1b) << 7;  // surrogate half?
+  *e |= (*c > 0x10FFFF) << 8;       // out of range?
+  *e |= (uchar(s[1]) & 0xc0) >> 2;
+  *e |= (uchar(s[2]) & 0xc0) >> 4;
+  *e |= uchar(s[3]) >> 6;
+  *e ^= 0x2a;  // top two bits of each tail byte correct?
+  *e >>= shifte[len];
+
+  return next;
+}
+
+constexpr uint32_t invalid_code_point = ~uint32_t();
+
+// Invokes f(cp, sv) for every code point cp in s with sv being the string view
+// corresponding to the code point. cp is invalid_code_point on error.
+template <typename F>
+FMT_CONSTEXPR void for_each_codepoint(string_view s, F f) {
+  auto decode = [f](const char* buf_ptr, const char* ptr) {
+    auto cp = uint32_t();
+    auto error = 0;
+    auto end = utf8_decode(buf_ptr, &cp, &error);
+    bool result = f(error ? invalid_code_point : cp,
+                    string_view(ptr, to_unsigned(end - buf_ptr)));
+    return result ? end : nullptr;
+  };
+  auto p = s.data();
+  const size_t block_size = 4;  // utf8_decode always reads blocks of 4 chars.
+  if (s.size() >= block_size) {
+    for (auto end = p + s.size() - block_size + 1; p < end;) {
+      p = decode(p, p);
+      if (!p) return;
+    }
+  }
+  if (auto num_chars_left = s.data() + s.size() - p) {
+    char buf[2 * block_size - 1] = {};
+    copy_str<char>(p, p + num_chars_left, buf);
+    const char* buf_ptr = buf;
+    do {
+      auto end = decode(buf_ptr, p);
+      if (!end) return;
+      p += end - buf_ptr;
+      buf_ptr = end;
+    } while (buf_ptr - buf < num_chars_left);
+  }
+}
+
+template <typename Char>
+inline auto compute_width(basic_string_view<Char> s) -> size_t {
+  return s.size();
+}
+
+// Computes approximate display width of a UTF-8 string.
+FMT_CONSTEXPR inline size_t compute_width(string_view s) {
+  size_t num_code_points = 0;
+  // It is not a lambda for compatibility with C++14.
+  struct count_code_points {
+    size_t* count;
+    FMT_CONSTEXPR auto operator()(uint32_t cp, string_view) const -> bool {
+      *count += detail::to_unsigned(
+          1 +
+          (cp >= 0x1100 &&
+           (cp <= 0x115f ||  // Hangul Jamo init. consonants
+            cp == 0x2329 ||  // LEFT-POINTING ANGLE BRACKET
+            cp == 0x232a ||  // RIGHT-POINTING ANGLE BRACKET
+            // CJK ... Yi except IDEOGRAPHIC HALF FILL SPACE:
+            (cp >= 0x2e80 && cp <= 0xa4cf && cp != 0x303f) ||
+            (cp >= 0xac00 && cp <= 0xd7a3) ||    // Hangul Syllables
+            (cp >= 0xf900 && cp <= 0xfaff) ||    // CJK Compatibility Ideographs
+            (cp >= 0xfe10 && cp <= 0xfe19) ||    // Vertical Forms
+            (cp >= 0xfe30 && cp <= 0xfe6f) ||    // CJK Compatibility Forms
+            (cp >= 0xff00 && cp <= 0xff60) ||    // Fullwidth Forms
+            (cp >= 0xffe0 && cp <= 0xffe6) ||    // Fullwidth Forms
+            (cp >= 0x20000 && cp <= 0x2fffd) ||  // CJK
+            (cp >= 0x30000 && cp <= 0x3fffd) ||
+            // Miscellaneous Symbols and Pictographs + Emoticons:
+            (cp >= 0x1f300 && cp <= 0x1f64f) ||
+            // Supplemental Symbols and Pictographs:
+            (cp >= 0x1f900 && cp <= 0x1f9ff))));
+      return true;
+    }
+  };
+  for_each_codepoint(s, count_code_points{&num_code_points});
+  return num_code_points;
+}
+
+inline auto compute_width(basic_string_view<char8_type> s) -> size_t {
+  return compute_width(basic_string_view<char>(
+      reinterpret_cast<const char*>(s.data()), s.size()));
+}
+
+template <typename Char>
+inline auto code_point_index(basic_string_view<Char> s, size_t n) -> size_t {
+  size_t size = s.size();
+  return n < size ? n : size;
+}
+
+// Calculates the index of the nth code point in a UTF-8 string.
+inline auto code_point_index(basic_string_view<char8_type> s, size_t n)
+    -> size_t {
+  const char8_type* data = s.data();
+  size_t num_code_points = 0;
+  for (size_t i = 0, size = s.size(); i != size; ++i) {
+    if ((data[i] & 0xc0) != 0x80 && ++num_code_points > n) return i;
+  }
+  return s.size();
+}
+
+template <typename T, bool = std::is_floating_point<T>::value>
+struct is_fast_float : bool_constant<std::numeric_limits<T>::is_iec559 &&
+                                     sizeof(T) <= sizeof(double)> {};
+template <typename T> struct is_fast_float<T, false> : std::false_type {};
+
+#ifndef FMT_USE_FULL_CACHE_DRAGONBOX
+#  define FMT_USE_FULL_CACHE_DRAGONBOX 0
+#endif
+
+template <typename T>
+template <typename U>
+void buffer<T>::append(const U* begin, const U* end) {
+  while (begin != end) {
+    auto count = to_unsigned(end - begin);
+    try_reserve(size_ + count);
+    auto free_cap = capacity_ - size_;
+    if (free_cap < count) count = free_cap;
+    std::uninitialized_copy_n(begin, count, make_checked(ptr_ + size_, count));
+    size_ += count;
+    begin += count;
+  }
+}
+
+template <typename T, typename Enable = void>
+struct is_locale : std::false_type {};
+template <typename T>
+struct is_locale<T, void_t<decltype(T::classic())>> : std::true_type {};
+}  // namespace detail
+
+FMT_MODULE_EXPORT_BEGIN
+
+// The number of characters to store in the basic_memory_buffer object itself
+// to avoid dynamic memory allocation.
+enum { inline_buffer_size = 500 };
+
+/**
+  \rst
+  A dynamically growing memory buffer for trivially copyable/constructible types
+  with the first ``SIZE`` elements stored in the object itself.
+
+  You can use the ``memory_buffer`` type alias for ``char`` instead.
+
+  **Example**::
+
+     auto out = fmt::memory_buffer();
+     format_to(std::back_inserter(out), "The answer is {}.", 42);
+
+  This will append the following output to the ``out`` object:
+
+  .. code-block:: none
+
+     The answer is 42.
+
+  The output can be converted to an ``std::string`` with ``to_string(out)``.
+  \endrst
+ */
+template <typename T, size_t SIZE = inline_buffer_size,
+          typename Allocator = std::allocator<T>>
+class basic_memory_buffer final : public detail::buffer<T> {
+ private:
+  T store_[SIZE];
+
+  // Don't inherit from Allocator avoid generating type_info for it.
+  Allocator alloc_;
+
+  // Deallocate memory allocated by the buffer.
+  FMT_CONSTEXPR20 void deallocate() {
+    T* data = this->data();
+    if (data != store_) alloc_.deallocate(data, this->capacity());
+  }
+
+ protected:
+  FMT_CONSTEXPR20 void grow(size_t size) override;
+
+ public:
+  using value_type = T;
+  using const_reference = const T&;
+
+  FMT_CONSTEXPR20 explicit basic_memory_buffer(
+      const Allocator& alloc = Allocator())
+      : alloc_(alloc) {
+    this->set(store_, SIZE);
+    if (detail::is_constant_evaluated()) {
+      detail::fill_n(store_, SIZE, T{});
+    }
+  }
+  FMT_CONSTEXPR20 ~basic_memory_buffer() { deallocate(); }
+
+ private:
+  // Move data from other to this buffer.
+  FMT_CONSTEXPR20 void move(basic_memory_buffer& other) {
+    alloc_ = std::move(other.alloc_);
+    T* data = other.data();
+    size_t size = other.size(), capacity = other.capacity();
+    if (data == other.store_) {
+      this->set(store_, capacity);
+      if (detail::is_constant_evaluated()) {
+        detail::copy_str<T>(other.store_, other.store_ + size,
+                            detail::make_checked(store_, capacity));
+      } else {
+        std::uninitialized_copy(other.store_, other.store_ + size,
+                                detail::make_checked(store_, capacity));
+      }
+    } else {
+      this->set(data, capacity);
+      // Set pointer to the inline array so that delete is not called
+      // when deallocating.
+      other.set(other.store_, 0);
+    }
+    this->resize(size);
+  }
+
+ public:
+  /**
+    \rst
+    Constructs a :class:`fmt::basic_memory_buffer` object moving the content
+    of the other object to it.
+    \endrst
+   */
+  FMT_CONSTEXPR20 basic_memory_buffer(basic_memory_buffer&& other)
+      FMT_NOEXCEPT {
+    move(other);
+  }
+
+  /**
+    \rst
+    Moves the content of the other ``basic_memory_buffer`` object to this one.
+    \endrst
+   */
+  auto operator=(basic_memory_buffer&& other) FMT_NOEXCEPT
+      -> basic_memory_buffer& {
+    FMT_ASSERT(this != &other, "");
+    deallocate();
+    move(other);
+    return *this;
+  }
+
+  // Returns a copy of the allocator associated with this buffer.
+  auto get_allocator() const -> Allocator { return alloc_; }
+
+  /**
+    Resizes the buffer to contain *count* elements. If T is a POD type new
+    elements may not be initialized.
+   */
+  FMT_CONSTEXPR20 void resize(size_t count) { this->try_resize(count); }
+
+  /** Increases the buffer capacity to *new_capacity*. */
+  void reserve(size_t new_capacity) { this->try_reserve(new_capacity); }
+
+  // Directly append data into the buffer
+  using detail::buffer<T>::append;
+  template <typename ContiguousRange>
+  void append(const ContiguousRange& range) {
+    append(range.data(), range.data() + range.size());
+  }
+};
+
+template <typename T, size_t SIZE, typename Allocator>
+FMT_CONSTEXPR20 void basic_memory_buffer<T, SIZE, Allocator>::grow(
+    size_t size) {
+#ifdef FMT_FUZZ
+  if (size > 5000) throw std::runtime_error("fuzz mode - won't grow that much");
+#endif
+  const size_t max_size = std::allocator_traits<Allocator>::max_size(alloc_);
+  size_t old_capacity = this->capacity();
+  size_t new_capacity = old_capacity + old_capacity / 2;
+  if (size > new_capacity)
+    new_capacity = size;
+  else if (new_capacity > max_size)
+    new_capacity = size > max_size ? size : max_size;
+  T* old_data = this->data();
+  T* new_data =
+      std::allocator_traits<Allocator>::allocate(alloc_, new_capacity);
+  // The following code doesn't throw, so the raw pointer above doesn't leak.
+  std::uninitialized_copy(old_data, old_data + this->size(),
+                          detail::make_checked(new_data, new_capacity));
+  this->set(new_data, new_capacity);
+  // deallocate must not throw according to the standard, but even if it does,
+  // the buffer already uses the new storage and will deallocate it in
+  // destructor.
+  if (old_data != store_) alloc_.deallocate(old_data, old_capacity);
+}
+
+using memory_buffer = basic_memory_buffer<char>;
+
+template <typename T, size_t SIZE, typename Allocator>
+struct is_contiguous<basic_memory_buffer<T, SIZE, Allocator>> : std::true_type {
+};
+
+namespace detail {
+FMT_API void print(std::FILE*, string_view);
+}
+
+/** A formatting error such as invalid format string. */
+FMT_CLASS_API
+class FMT_API format_error : public std::runtime_error {
+ public:
+  explicit format_error(const char* message) : std::runtime_error(message) {}
+  explicit format_error(const std::string& message)
+      : std::runtime_error(message) {}
+  format_error(const format_error&) = default;
+  format_error& operator=(const format_error&) = default;
+  format_error(format_error&&) = default;
+  format_error& operator=(format_error&&) = default;
+  ~format_error() FMT_NOEXCEPT override FMT_MSC_DEFAULT;
+};
+
+/**
+  \rst
+  Constructs a `~fmt::format_arg_store` object that contains references
+  to arguments and can be implicitly converted to `~fmt::format_args`.
+  If ``fmt`` is a compile-time string then `make_args_checked` checks
+  its validity at compile time.
+  \endrst
+ */
+template <typename... Args, typename S, typename Char = char_t<S>>
+FMT_INLINE auto make_args_checked(const S& fmt,
+                                  const remove_reference_t<Args>&... args)
+    -> format_arg_store<buffer_context<Char>, remove_reference_t<Args>...> {
+  static_assert(
+      detail::count<(
+              std::is_base_of<detail::view, remove_reference_t<Args>>::value &&
+              std::is_reference<Args>::value)...>() == 0,
+      "passing views as lvalues is disallowed");
+  detail::check_format_string<Args...>(fmt);
+  return {args...};
+}
+
+// compile-time support
+namespace detail_exported {
+#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+template <typename Char, size_t N> struct fixed_string {
+  constexpr fixed_string(const Char (&str)[N]) {
+    detail::copy_str<Char, const Char*, Char*>(static_cast<const Char*>(str),
+                                               str + N, data);
+  }
+  Char data[N]{};
+};
+#endif
+
+// Converts a compile-time string to basic_string_view.
+template <typename Char, size_t N>
+constexpr auto compile_string_to_view(const Char (&s)[N])
+    -> basic_string_view<Char> {
+  // Remove trailing NUL character if needed. Won't be present if this is used
+  // with a raw character array (i.e. not defined as a string).
+  return {s, N - (std::char_traits<Char>::to_int_type(s[N - 1]) == 0 ? 1 : 0)};
+}
+template <typename Char>
+constexpr auto compile_string_to_view(detail::std_string_view<Char> s)
+    -> basic_string_view<Char> {
+  return {s.data(), s.size()};
+}
+}  // namespace detail_exported
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+template <typename T> struct is_integral : std::is_integral<T> {};
+template <> struct is_integral<int128_t> : std::true_type {};
+template <> struct is_integral<uint128_t> : std::true_type {};
+
+template <typename T>
+using is_signed =
+    std::integral_constant<bool, std::numeric_limits<T>::is_signed ||
+                                     std::is_same<T, int128_t>::value>;
+
+// Returns true if value is negative, false otherwise.
+// Same as `value < 0` but doesn't produce warnings if T is an unsigned type.
+template <typename T, FMT_ENABLE_IF(is_signed<T>::value)>
+FMT_CONSTEXPR auto is_negative(T value) -> bool {
+  return value < 0;
+}
+template <typename T, FMT_ENABLE_IF(!is_signed<T>::value)>
+FMT_CONSTEXPR auto is_negative(T) -> bool {
+  return false;
+}
+
+template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+FMT_CONSTEXPR auto is_supported_floating_point(T) -> uint16_t {
+  return (std::is_same<T, float>::value && FMT_USE_FLOAT) ||
+         (std::is_same<T, double>::value && FMT_USE_DOUBLE) ||
+         (std::is_same<T, long double>::value && FMT_USE_LONG_DOUBLE);
+}
+
+// Smallest of uint32_t, uint64_t, uint128_t that is large enough to
+// represent all values of an integral type T.
+template <typename T>
+using uint32_or_64_or_128_t =
+    conditional_t<num_bits<T>() <= 32 && !FMT_REDUCE_INT_INSTANTIATIONS,
+                  uint32_t,
+                  conditional_t<num_bits<T>() <= 64, uint64_t, uint128_t>>;
+template <typename T>
+using uint64_or_128_t = conditional_t<num_bits<T>() <= 64, uint64_t, uint128_t>;
+
+#define FMT_POWERS_OF_10(factor)                                             \
+  factor * 10, (factor)*100, (factor)*1000, (factor)*10000, (factor)*100000, \
+      (factor)*1000000, (factor)*10000000, (factor)*100000000,               \
+      (factor)*1000000000
+
+// Converts value in the range [0, 100) to a string.
+constexpr const char* digits2(size_t value) {
+  // GCC generates slightly better code when value is pointer-size.
+  return &"0001020304050607080910111213141516171819"
+         "2021222324252627282930313233343536373839"
+         "4041424344454647484950515253545556575859"
+         "6061626364656667686970717273747576777879"
+         "8081828384858687888990919293949596979899"[value * 2];
+}
+
+// Sign is a template parameter to workaround a bug in gcc 4.8.
+template <typename Char, typename Sign> constexpr Char sign(Sign s) {
+#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 604
+  static_assert(std::is_same<Sign, sign_t>::value, "");
+#endif
+  return static_cast<Char>("\0-+ "[s]);
+}
+
+template <typename T> FMT_CONSTEXPR auto count_digits_fallback(T n) -> int {
+  int count = 1;
+  for (;;) {
+    // Integer division is slow so do it for a group of four digits instead
+    // of for every digit. The idea comes from the talk by Alexandrescu
+    // "Three Optimization Tips for C++". See speed-test for a comparison.
+    if (n < 10) return count;
+    if (n < 100) return count + 1;
+    if (n < 1000) return count + 2;
+    if (n < 10000) return count + 3;
+    n /= 10000u;
+    count += 4;
+  }
+}
+#if FMT_USE_INT128
+FMT_CONSTEXPR inline auto count_digits(uint128_t n) -> int {
+  return count_digits_fallback(n);
+}
+#endif
+
+#ifdef FMT_BUILTIN_CLZLL
+// It is a separate function rather than a part of count_digits to workaround
+// the lack of static constexpr in constexpr functions.
+inline auto do_count_digits(uint64_t n) -> int {
+  // This has comparable performance to the version by Kendall Willets
+  // (https://github.com/fmtlib/format-benchmark/blob/master/digits10)
+  // but uses smaller tables.
+  // Maps bsr(n) to ceil(log10(pow(2, bsr(n) + 1) - 1)).
+  static constexpr uint8_t bsr2log10[] = {
+      1,  1,  1,  2,  2,  2,  3,  3,  3,  4,  4,  4,  4,  5,  5,  5,
+      6,  6,  6,  7,  7,  7,  7,  8,  8,  8,  9,  9,  9,  10, 10, 10,
+      10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 15, 15,
+      15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20};
+  auto t = bsr2log10[FMT_BUILTIN_CLZLL(n | 1) ^ 63];
+  static constexpr const uint64_t zero_or_powers_of_10[] = {
+      0, 0, FMT_POWERS_OF_10(1U), FMT_POWERS_OF_10(1000000000ULL),
+      10000000000000000000ULL};
+  return t - (n < zero_or_powers_of_10[t]);
+}
+#endif
+
+// Returns the number of decimal digits in n. Leading zeros are not counted
+// except for n == 0 in which case count_digits returns 1.
+FMT_CONSTEXPR20 inline auto count_digits(uint64_t n) -> int {
+#ifdef FMT_BUILTIN_CLZLL
+  if (!is_constant_evaluated()) {
+    return do_count_digits(n);
+  }
+#endif
+  return count_digits_fallback(n);
+}
+
+// Counts the number of digits in n. BITS = log2(radix).
+template <int BITS, typename UInt>
+FMT_CONSTEXPR auto count_digits(UInt n) -> int {
+#ifdef FMT_BUILTIN_CLZ
+  if (num_bits<UInt>() == 32)
+    return (FMT_BUILTIN_CLZ(static_cast<uint32_t>(n) | 1) ^ 31) / BITS + 1;
+#endif
+  // Lambda avoids unreachable code warnings from NVHPC.
+  return [](UInt m) {
+    int num_digits = 0;
+    do {
+      ++num_digits;
+    } while ((m >>= BITS) != 0);
+    return num_digits;
+  }(n);
+}
+
+template <> auto count_digits<4>(detail::fallback_uintptr n) -> int;
+
+#ifdef FMT_BUILTIN_CLZ
+// It is a separate function rather than a part of count_digits to workaround
+// the lack of static constexpr in constexpr functions.
+FMT_INLINE auto do_count_digits(uint32_t n) -> int {
+// An optimization by Kendall Willets from https://bit.ly/3uOIQrB.
+// This increments the upper 32 bits (log10(T) - 1) when >= T is added.
+#  define FMT_INC(T) (((sizeof(#  T) - 1ull) << 32) - T)
+  static constexpr uint64_t table[] = {
+      FMT_INC(0),          FMT_INC(0),          FMT_INC(0),           // 8
+      FMT_INC(10),         FMT_INC(10),         FMT_INC(10),          // 64
+      FMT_INC(100),        FMT_INC(100),        FMT_INC(100),         // 512
+      FMT_INC(1000),       FMT_INC(1000),       FMT_INC(1000),        // 4096
+      FMT_INC(10000),      FMT_INC(10000),      FMT_INC(10000),       // 32k
+      FMT_INC(100000),     FMT_INC(100000),     FMT_INC(100000),      // 256k
+      FMT_INC(1000000),    FMT_INC(1000000),    FMT_INC(1000000),     // 2048k
+      FMT_INC(10000000),   FMT_INC(10000000),   FMT_INC(10000000),    // 16M
+      FMT_INC(100000000),  FMT_INC(100000000),  FMT_INC(100000000),   // 128M
+      FMT_INC(1000000000), FMT_INC(1000000000), FMT_INC(1000000000),  // 1024M
+      FMT_INC(1000000000), FMT_INC(1000000000)                        // 4B
+  };
+  auto inc = table[FMT_BUILTIN_CLZ(n | 1) ^ 31];
+  return static_cast<int>((n + inc) >> 32);
+}
+#endif
+
+// Optional version of count_digits for better performance on 32-bit platforms.
+FMT_CONSTEXPR20 inline auto count_digits(uint32_t n) -> int {
+#ifdef FMT_BUILTIN_CLZ
+  if (!is_constant_evaluated()) {
+    return do_count_digits(n);
+  }
+#endif
+  return count_digits_fallback(n);
+}
+
+template <typename Int> constexpr auto digits10() FMT_NOEXCEPT -> int {
+  return std::numeric_limits<Int>::digits10;
+}
+template <> constexpr auto digits10<int128_t>() FMT_NOEXCEPT -> int {
+  return 38;
+}
+template <> constexpr auto digits10<uint128_t>() FMT_NOEXCEPT -> int {
+  return 38;
+}
+
+template <typename Char> struct thousands_sep_result {
+  std::string grouping;
+  Char thousands_sep;
+};
+
+template <typename Char>
+FMT_API auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result<Char>;
+template <typename Char>
+inline auto thousands_sep(locale_ref loc) -> thousands_sep_result<Char> {
+  auto result = thousands_sep_impl<char>(loc);
+  return {result.grouping, Char(result.thousands_sep)};
+}
+template <>
+inline auto thousands_sep(locale_ref loc) -> thousands_sep_result<wchar_t> {
+  return thousands_sep_impl<wchar_t>(loc);
+}
+
+template <typename Char>
+FMT_API auto decimal_point_impl(locale_ref loc) -> Char;
+template <typename Char> inline auto decimal_point(locale_ref loc) -> Char {
+  return Char(decimal_point_impl<char>(loc));
+}
+template <> inline auto decimal_point(locale_ref loc) -> wchar_t {
+  return decimal_point_impl<wchar_t>(loc);
+}
+
+// Compares two characters for equality.
+template <typename Char> auto equal2(const Char* lhs, const char* rhs) -> bool {
+  return lhs[0] == Char(rhs[0]) && lhs[1] == Char(rhs[1]);
+}
+inline auto equal2(const char* lhs, const char* rhs) -> bool {
+  return memcmp(lhs, rhs, 2) == 0;
+}
+
+// Copies two characters from src to dst.
+template <typename Char>
+FMT_CONSTEXPR20 FMT_INLINE void copy2(Char* dst, const char* src) {
+  if (!is_constant_evaluated() && sizeof(Char) == sizeof(char)) {
+    memcpy(dst, src, 2);
+    return;
+  }
+  *dst++ = static_cast<Char>(*src++);
+  *dst = static_cast<Char>(*src);
+}
+
+template <typename Iterator> struct format_decimal_result {
+  Iterator begin;
+  Iterator end;
+};
+
+// Formats a decimal unsigned integer value writing into out pointing to a
+// buffer of specified size. The caller must ensure that the buffer is large
+// enough.
+template <typename Char, typename UInt>
+FMT_CONSTEXPR20 auto format_decimal(Char* out, UInt value, int size)
+    -> format_decimal_result<Char*> {
+  FMT_ASSERT(size >= count_digits(value), "invalid digit count");
+  out += size;
+  Char* end = out;
+  while (value >= 100) {
+    // Integer division is slow so do it for a group of two digits instead
+    // of for every digit. The idea comes from the talk by Alexandrescu
+    // "Three Optimization Tips for C++". See speed-test for a comparison.
+    out -= 2;
+    copy2(out, digits2(static_cast<size_t>(value % 100)));
+    value /= 100;
+  }
+  if (value < 10) {
+    *--out = static_cast<Char>('0' + value);
+    return {out, end};
+  }
+  out -= 2;
+  copy2(out, digits2(static_cast<size_t>(value)));
+  return {out, end};
+}
+
+template <typename Char, typename UInt, typename Iterator,
+          FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<Iterator>>::value)>
+inline auto format_decimal(Iterator out, UInt value, int size)
+    -> format_decimal_result<Iterator> {
+  // Buffer is large enough to hold all digits (digits10 + 1).
+  Char buffer[digits10<UInt>() + 1];
+  auto end = format_decimal(buffer, value, size).end;
+  return {out, detail::copy_str_noinline<Char>(buffer, end, out)};
+}
+
+template <unsigned BASE_BITS, typename Char, typename UInt>
+FMT_CONSTEXPR auto format_uint(Char* buffer, UInt value, int num_digits,
+                               bool upper = false) -> Char* {
+  buffer += num_digits;
+  Char* end = buffer;
+  do {
+    const char* digits = upper ? "0123456789ABCDEF" : "0123456789abcdef";
+    unsigned digit = (value & ((1 << BASE_BITS) - 1));
+    *--buffer = static_cast<Char>(BASE_BITS < 4 ? static_cast<char>('0' + digit)
+                                                : digits[digit]);
+  } while ((value >>= BASE_BITS) != 0);
+  return end;
+}
+
+template <unsigned BASE_BITS, typename Char>
+auto format_uint(Char* buffer, detail::fallback_uintptr n, int num_digits,
+                 bool = false) -> Char* {
+  auto char_digits = std::numeric_limits<unsigned char>::digits / 4;
+  int start = (num_digits + char_digits - 1) / char_digits - 1;
+  if (int start_digits = num_digits % char_digits) {
+    unsigned value = n.value[start--];
+    buffer = format_uint<BASE_BITS>(buffer, value, start_digits);
+  }
+  for (; start >= 0; --start) {
+    unsigned value = n.value[start];
+    buffer += char_digits;
+    auto p = buffer;
+    for (int i = 0; i < char_digits; ++i) {
+      unsigned digit = (value & ((1 << BASE_BITS) - 1));
+      *--p = static_cast<Char>("0123456789abcdef"[digit]);
+      value >>= BASE_BITS;
+    }
+  }
+  return buffer;
+}
+
+template <unsigned BASE_BITS, typename Char, typename It, typename UInt>
+inline auto format_uint(It out, UInt value, int num_digits, bool upper = false)
+    -> It {
+  if (auto ptr = to_pointer<Char>(out, to_unsigned(num_digits))) {
+    format_uint<BASE_BITS>(ptr, value, num_digits, upper);
+    return out;
+  }
+  // Buffer should be large enough to hold all digits (digits / BASE_BITS + 1).
+  char buffer[num_bits<UInt>() / BASE_BITS + 1];
+  format_uint<BASE_BITS>(buffer, value, num_digits, upper);
+  return detail::copy_str_noinline<Char>(buffer, buffer + num_digits, out);
+}
+
+// A converter from UTF-8 to UTF-16.
+class utf8_to_utf16 {
+ private:
+  basic_memory_buffer<wchar_t> buffer_;
+
+ public:
+  FMT_API explicit utf8_to_utf16(string_view s);
+  operator basic_string_view<wchar_t>() const { return {&buffer_[0], size()}; }
+  auto size() const -> size_t { return buffer_.size() - 1; }
+  auto c_str() const -> const wchar_t* { return &buffer_[0]; }
+  auto str() const -> std::wstring { return {&buffer_[0], size()}; }
+};
+
+namespace dragonbox {
+
+// Type-specific information that Dragonbox uses.
+template <class T> struct float_info;
+
+template <> struct float_info<float> {
+  using carrier_uint = uint32_t;
+  static const int significand_bits = 23;
+  static const int exponent_bits = 8;
+  static const int min_exponent = -126;
+  static const int max_exponent = 127;
+  static const int exponent_bias = -127;
+  static const int decimal_digits = 9;
+  static const int kappa = 1;
+  static const int big_divisor = 100;
+  static const int small_divisor = 10;
+  static const int min_k = -31;
+  static const int max_k = 46;
+  static const int cache_bits = 64;
+  static const int divisibility_check_by_5_threshold = 39;
+  static const int case_fc_pm_half_lower_threshold = -1;
+  static const int case_fc_pm_half_upper_threshold = 6;
+  static const int case_fc_lower_threshold = -2;
+  static const int case_fc_upper_threshold = 6;
+  static const int case_shorter_interval_left_endpoint_lower_threshold = 2;
+  static const int case_shorter_interval_left_endpoint_upper_threshold = 3;
+  static const int shorter_interval_tie_lower_threshold = -35;
+  static const int shorter_interval_tie_upper_threshold = -35;
+  static const int max_trailing_zeros = 7;
+};
+
+template <> struct float_info<double> {
+  using carrier_uint = uint64_t;
+  static const int significand_bits = 52;
+  static const int exponent_bits = 11;
+  static const int min_exponent = -1022;
+  static const int max_exponent = 1023;
+  static const int exponent_bias = -1023;
+  static const int decimal_digits = 17;
+  static const int kappa = 2;
+  static const int big_divisor = 1000;
+  static const int small_divisor = 100;
+  static const int min_k = -292;
+  static const int max_k = 326;
+  static const int cache_bits = 128;
+  static const int divisibility_check_by_5_threshold = 86;
+  static const int case_fc_pm_half_lower_threshold = -2;
+  static const int case_fc_pm_half_upper_threshold = 9;
+  static const int case_fc_lower_threshold = -4;
+  static const int case_fc_upper_threshold = 9;
+  static const int case_shorter_interval_left_endpoint_lower_threshold = 2;
+  static const int case_shorter_interval_left_endpoint_upper_threshold = 3;
+  static const int shorter_interval_tie_lower_threshold = -77;
+  static const int shorter_interval_tie_upper_threshold = -77;
+  static const int max_trailing_zeros = 16;
+};
+
+template <typename T> struct decimal_fp {
+  using significand_type = typename float_info<T>::carrier_uint;
+  significand_type significand;
+  int exponent;
+};
+
+template <typename T>
+FMT_API auto to_decimal(T x) FMT_NOEXCEPT -> decimal_fp<T>;
+}  // namespace dragonbox
+
+template <typename T>
+constexpr auto exponent_mask() ->
+    typename dragonbox::float_info<T>::carrier_uint {
+  using uint = typename dragonbox::float_info<T>::carrier_uint;
+  return ((uint(1) << dragonbox::float_info<T>::exponent_bits) - 1)
+         << dragonbox::float_info<T>::significand_bits;
+}
+
+// Writes the exponent exp in the form "[+-]d{2,3}" to buffer.
+template <typename Char, typename It>
+FMT_CONSTEXPR auto write_exponent(int exp, It it) -> It {
+  FMT_ASSERT(-10000 < exp && exp < 10000, "exponent out of range");
+  if (exp < 0) {
+    *it++ = static_cast<Char>('-');
+    exp = -exp;
+  } else {
+    *it++ = static_cast<Char>('+');
+  }
+  if (exp >= 100) {
+    const char* top = digits2(to_unsigned(exp / 100));
+    if (exp >= 1000) *it++ = static_cast<Char>(top[0]);
+    *it++ = static_cast<Char>(top[1]);
+    exp %= 100;
+  }
+  const char* d = digits2(to_unsigned(exp));
+  *it++ = static_cast<Char>(d[0]);
+  *it++ = static_cast<Char>(d[1]);
+  return it;
+}
+
+template <typename T>
+FMT_HEADER_ONLY_CONSTEXPR20 auto format_float(T value, int precision,
+                                              float_specs specs,
+                                              buffer<char>& buf) -> int;
+
+// Formats a floating-point number with snprintf.
+template <typename T>
+auto snprintf_float(T value, int precision, float_specs specs,
+                    buffer<char>& buf) -> int;
+
+template <typename T> constexpr auto promote_float(T value) -> T {
+  return value;
+}
+constexpr auto promote_float(float value) -> double {
+  return static_cast<double>(value);
+}
+
+template <typename OutputIt, typename Char>
+FMT_NOINLINE FMT_CONSTEXPR auto fill(OutputIt it, size_t n,
+                                     const fill_t<Char>& fill) -> OutputIt {
+  auto fill_size = fill.size();
+  if (fill_size == 1) return detail::fill_n(it, n, fill[0]);
+  auto data = fill.data();
+  for (size_t i = 0; i < n; ++i)
+    it = copy_str<Char>(data, data + fill_size, it);
+  return it;
+}
+
+// Writes the output of f, padded according to format specifications in specs.
+// size: output size in code units.
+// width: output display width in (terminal) column positions.
+template <align::type align = align::left, typename OutputIt, typename Char,
+          typename F>
+FMT_CONSTEXPR auto write_padded(OutputIt out,
+                                const basic_format_specs<Char>& specs,
+                                size_t size, size_t width, F&& f) -> OutputIt {
+  static_assert(align == align::left || align == align::right, "");
+  unsigned spec_width = to_unsigned(specs.width);
+  size_t padding = spec_width > width ? spec_width - width : 0;
+  // Shifts are encoded as string literals because static constexpr is not
+  // supported in constexpr functions.
+  auto* shifts = align == align::left ? "\x1f\x1f\x00\x01" : "\x00\x1f\x00\x01";
+  size_t left_padding = padding >> shifts[specs.align];
+  size_t right_padding = padding - left_padding;
+  auto it = reserve(out, size + padding * specs.fill.size());
+  if (left_padding != 0) it = fill(it, left_padding, specs.fill);
+  it = f(it);
+  if (right_padding != 0) it = fill(it, right_padding, specs.fill);
+  return base_iterator(out, it);
+}
+
+template <align::type align = align::left, typename OutputIt, typename Char,
+          typename F>
+constexpr auto write_padded(OutputIt out, const basic_format_specs<Char>& specs,
+                            size_t size, F&& f) -> OutputIt {
+  return write_padded<align>(out, specs, size, size, f);
+}
+
+template <align::type align = align::left, typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write_bytes(OutputIt out, string_view bytes,
+                               const basic_format_specs<Char>& specs)
+    -> OutputIt {
+  return write_padded<align>(
+      out, specs, bytes.size(), [bytes](reserve_iterator<OutputIt> it) {
+        const char* data = bytes.data();
+        return copy_str<Char>(data, data + bytes.size(), it);
+      });
+}
+
+template <typename Char, typename OutputIt, typename UIntPtr>
+auto write_ptr(OutputIt out, UIntPtr value,
+               const basic_format_specs<Char>* specs) -> OutputIt {
+  int num_digits = count_digits<4>(value);
+  auto size = to_unsigned(num_digits) + size_t(2);
+  auto write = [=](reserve_iterator<OutputIt> it) {
+    *it++ = static_cast<Char>('0');
+    *it++ = static_cast<Char>('x');
+    return format_uint<4, Char>(it, value, num_digits);
+  };
+  return specs ? write_padded<align::right>(out, *specs, size, write)
+               : base_iterator(out, write(reserve(out, size)));
+}
+
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write_char(OutputIt out, Char value,
+                              const basic_format_specs<Char>& specs)
+    -> OutputIt {
+  return write_padded(out, specs, 1, [=](reserve_iterator<OutputIt> it) {
+    *it++ = value;
+    return it;
+  });
+}
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write(OutputIt out, Char value,
+                         const basic_format_specs<Char>& specs,
+                         locale_ref loc = {}) -> OutputIt {
+  return check_char_specs(specs)
+             ? write_char(out, value, specs)
+             : write(out, static_cast<int>(value), specs, loc);
+}
+
+// Data for write_int that doesn't depend on output iterator type. It is used to
+// avoid template code bloat.
+template <typename Char> struct write_int_data {
+  size_t size;
+  size_t padding;
+
+  FMT_CONSTEXPR write_int_data(int num_digits, unsigned prefix,
+                               const basic_format_specs<Char>& specs)
+      : size((prefix >> 24) + to_unsigned(num_digits)), padding(0) {
+    if (specs.align == align::numeric) {
+      auto width = to_unsigned(specs.width);
+      if (width > size) {
+        padding = width - size;
+        size = width;
+      }
+    } else if (specs.precision > num_digits) {
+      size = (prefix >> 24) + to_unsigned(specs.precision);
+      padding = to_unsigned(specs.precision - num_digits);
+    }
+  }
+};
+
+// Writes an integer in the format
+//   <left-padding><prefix><numeric-padding><digits><right-padding>
+// where <digits> are written by write_digits(it).
+// prefix contains chars in three lower bytes and the size in the fourth byte.
+template <typename OutputIt, typename Char, typename W>
+FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, int num_digits,
+                                        unsigned prefix,
+                                        const basic_format_specs<Char>& specs,
+                                        W write_digits) -> OutputIt {
+  // Slightly faster check for specs.width == 0 && specs.precision == -1.
+  if ((specs.width | (specs.precision + 1)) == 0) {
+    auto it = reserve(out, to_unsigned(num_digits) + (prefix >> 24));
+    if (prefix != 0) {
+      for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
+        *it++ = static_cast<Char>(p & 0xff);
+    }
+    return base_iterator(out, write_digits(it));
+  }
+  auto data = write_int_data<Char>(num_digits, prefix, specs);
+  return write_padded<align::right>(
+      out, specs, data.size, [=](reserve_iterator<OutputIt> it) {
+        for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
+          *it++ = static_cast<Char>(p & 0xff);
+        it = detail::fill_n(it, data.padding, static_cast<Char>('0'));
+        return write_digits(it);
+      });
+}
+
+template <typename Char> class digit_grouping {
+ private:
+  thousands_sep_result<Char> sep_;
+
+  struct next_state {
+    std::string::const_iterator group;
+    int pos;
+  };
+  next_state initial_state() const { return {sep_.grouping.begin(), 0}; }
+
+  // Returns the next digit group separator position.
+  int next(next_state& state) const {
+    if (!sep_.thousands_sep) return max_value<int>();
+    if (state.group == sep_.grouping.end())
+      return state.pos += sep_.grouping.back();
+    if (*state.group <= 0 || *state.group == max_value<char>())
+      return max_value<int>();
+    state.pos += *state.group++;
+    return state.pos;
+  }
+
+ public:
+  explicit digit_grouping(locale_ref loc, bool localized = true) {
+    if (localized)
+      sep_ = thousands_sep<Char>(loc);
+    else
+      sep_.thousands_sep = Char();
+  }
+  explicit digit_grouping(thousands_sep_result<Char> sep) : sep_(sep) {}
+
+  Char separator() const { return sep_.thousands_sep; }
+
+  int count_separators(int num_digits) const {
+    int count = 0;
+    auto state = initial_state();
+    while (num_digits > next(state)) ++count;
+    return count;
+  }
+
+  // Applies grouping to digits and write the output to out.
+  template <typename Out, typename C>
+  Out apply(Out out, basic_string_view<C> digits) const {
+    auto num_digits = static_cast<int>(digits.size());
+    auto separators = basic_memory_buffer<int>();
+    separators.push_back(0);
+    auto state = initial_state();
+    while (int i = next(state)) {
+      if (i >= num_digits) break;
+      separators.push_back(i);
+    }
+    for (int i = 0, sep_index = static_cast<int>(separators.size() - 1);
+         i < num_digits; ++i) {
+      if (num_digits - i == separators[sep_index]) {
+        *out++ = separator();
+        --sep_index;
+      }
+      *out++ = static_cast<Char>(digits[to_unsigned(i)]);
+    }
+    return out;
+  }
+};
+
+template <typename OutputIt, typename UInt, typename Char>
+auto write_int_localized(OutputIt out, UInt value, unsigned prefix,
+                         const basic_format_specs<Char>& specs,
+                         const digit_grouping<Char>& grouping) -> OutputIt {
+  static_assert(std::is_same<uint64_or_128_t<UInt>, UInt>::value, "");
+  int num_digits = count_digits(value);
+  char digits[40];
+  format_decimal(digits, value, num_digits);
+  unsigned size = to_unsigned((prefix != 0 ? 1 : 0) + num_digits +
+                              grouping.count_separators(num_digits));
+  return write_padded<align::right>(
+      out, specs, size, size, [&](reserve_iterator<OutputIt> it) {
+        if (prefix != 0) *it++ = static_cast<Char>(prefix);
+        return grouping.apply(it, string_view(digits, to_unsigned(num_digits)));
+      });
+}
+
+template <typename OutputIt, typename UInt, typename Char>
+auto write_int_localized(OutputIt& out, UInt value, unsigned prefix,
+                         const basic_format_specs<Char>& specs, locale_ref loc)
+    -> bool {
+  auto grouping = digit_grouping<Char>(loc);
+  out = write_int_localized(out, value, prefix, specs, grouping);
+  return true;
+}
+
+FMT_CONSTEXPR inline void prefix_append(unsigned& prefix, unsigned value) {
+  prefix |= prefix != 0 ? value << 8 : value;
+  prefix += (1u + (value > 0xff ? 1 : 0)) << 24;
+}
+
+template <typename UInt> struct write_int_arg {
+  UInt abs_value;
+  unsigned prefix;
+};
+
+template <typename T>
+FMT_CONSTEXPR auto make_write_int_arg(T value, sign_t sign)
+    -> write_int_arg<uint32_or_64_or_128_t<T>> {
+  auto prefix = 0u;
+  auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
+  if (is_negative(value)) {
+    prefix = 0x01000000 | '-';
+    abs_value = 0 - abs_value;
+  } else {
+    constexpr const unsigned prefixes[4] = {0, 0, 0x1000000u | '+',
+                                            0x1000000u | ' '};
+    prefix = prefixes[sign];
+  }
+  return {abs_value, prefix};
+}
+
+template <typename Char, typename OutputIt, typename T>
+FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg<T> arg,
+                                        const basic_format_specs<Char>& specs,
+                                        locale_ref loc) -> OutputIt {
+  static_assert(std::is_same<T, uint32_or_64_or_128_t<T>>::value, "");
+  auto abs_value = arg.abs_value;
+  auto prefix = arg.prefix;
+  switch (specs.type) {
+  case presentation_type::none:
+  case presentation_type::dec: {
+    if (specs.localized &&
+        write_int_localized(out, static_cast<uint64_or_128_t<T>>(abs_value),
+                            prefix, specs, loc)) {
+      return out;
+    }
+    auto num_digits = count_digits(abs_value);
+    return write_int(
+        out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
+          return format_decimal<Char>(it, abs_value, num_digits).end;
+        });
+  }
+  case presentation_type::hex_lower:
+  case presentation_type::hex_upper: {
+    bool upper = specs.type == presentation_type::hex_upper;
+    if (specs.alt)
+      prefix_append(prefix, unsigned(upper ? 'X' : 'x') << 8 | '0');
+    int num_digits = count_digits<4>(abs_value);
+    return write_int(
+        out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
+          return format_uint<4, Char>(it, abs_value, num_digits, upper);
+        });
+  }
+  case presentation_type::bin_lower:
+  case presentation_type::bin_upper: {
+    bool upper = specs.type == presentation_type::bin_upper;
+    if (specs.alt)
+      prefix_append(prefix, unsigned(upper ? 'B' : 'b') << 8 | '0');
+    int num_digits = count_digits<1>(abs_value);
+    return write_int(out, num_digits, prefix, specs,
+                     [=](reserve_iterator<OutputIt> it) {
+                       return format_uint<1, Char>(it, abs_value, num_digits);
+                     });
+  }
+  case presentation_type::oct: {
+    int num_digits = count_digits<3>(abs_value);
+    // Octal prefix '0' is counted as a digit, so only add it if precision
+    // is not greater than the number of digits.
+    if (specs.alt && specs.precision <= num_digits && abs_value != 0)
+      prefix_append(prefix, '0');
+    return write_int(out, num_digits, prefix, specs,
+                     [=](reserve_iterator<OutputIt> it) {
+                       return format_uint<3, Char>(it, abs_value, num_digits);
+                     });
+  }
+  case presentation_type::chr:
+    return write_char(out, static_cast<Char>(abs_value), specs);
+  default:
+    throw_format_error("invalid type specifier");
+  }
+  return out;
+}
+template <typename Char, typename OutputIt, typename T>
+FMT_CONSTEXPR FMT_NOINLINE auto write_int_noinline(
+    OutputIt out, write_int_arg<T> arg, const basic_format_specs<Char>& specs,
+    locale_ref loc) -> OutputIt {
+  return write_int(out, arg, specs, loc);
+}
+template <typename Char, typename OutputIt, typename T,
+          FMT_ENABLE_IF(is_integral<T>::value &&
+                        !std::is_same<T, bool>::value &&
+                        std::is_same<OutputIt, buffer_appender<Char>>::value)>
+FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
+                                    const basic_format_specs<Char>& specs,
+                                    locale_ref loc) -> OutputIt {
+  return write_int_noinline(out, make_write_int_arg(value, specs.sign), specs,
+                            loc);
+}
+// An inlined version of write used in format string compilation.
+template <typename Char, typename OutputIt, typename T,
+          FMT_ENABLE_IF(is_integral<T>::value &&
+                        !std::is_same<T, bool>::value &&
+                        !std::is_same<OutputIt, buffer_appender<Char>>::value)>
+FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
+                                    const basic_format_specs<Char>& specs,
+                                    locale_ref loc) -> OutputIt {
+  return write_int(out, make_write_int_arg(value, specs.sign), specs, loc);
+}
+
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> s,
+                         const basic_format_specs<Char>& specs) -> OutputIt {
+  auto data = s.data();
+  auto size = s.size();
+  if (specs.precision >= 0 && to_unsigned(specs.precision) < size)
+    size = code_point_index(s, to_unsigned(specs.precision));
+  auto width =
+      specs.width != 0 ? compute_width(basic_string_view<Char>(data, size)) : 0;
+  return write_padded(out, specs, size, width,
+                      [=](reserve_iterator<OutputIt> it) {
+                        return copy_str<Char>(data, data + size, it);
+                      });
+}
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write(OutputIt out,
+                         basic_string_view<type_identity_t<Char>> s,
+                         const basic_format_specs<Char>& specs, locale_ref)
+    -> OutputIt {
+  check_string_type_spec(specs.type);
+  return write(out, s, specs);
+}
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write(OutputIt out, const Char* s,
+                         const basic_format_specs<Char>& specs, locale_ref)
+    -> OutputIt {
+  return check_cstring_type_spec(specs.type)
+             ? write(out, basic_string_view<Char>(s), specs, {})
+             : write_ptr<Char>(out, to_uintptr(s), &specs);
+}
+
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR20 auto write_nonfinite(OutputIt out, bool isinf,
+                                     basic_format_specs<Char> specs,
+                                     const float_specs& fspecs) -> OutputIt {
+  auto str =
+      isinf ? (fspecs.upper ? "INF" : "inf") : (fspecs.upper ? "NAN" : "nan");
+  constexpr size_t str_size = 3;
+  auto sign = fspecs.sign;
+  auto size = str_size + (sign ? 1 : 0);
+  // Replace '0'-padding with space for non-finite values.
+  const bool is_zero_fill =
+      specs.fill.size() == 1 && *specs.fill.data() == static_cast<Char>('0');
+  if (is_zero_fill) specs.fill[0] = static_cast<Char>(' ');
+  return write_padded(out, specs, size, [=](reserve_iterator<OutputIt> it) {
+    if (sign) *it++ = detail::sign<Char>(sign);
+    return copy_str<Char>(str, str + str_size, it);
+  });
+}
+
+// A decimal floating-point number significand * pow(10, exp).
+struct big_decimal_fp {
+  const char* significand;
+  int significand_size;
+  int exponent;
+};
+
+constexpr auto get_significand_size(const big_decimal_fp& fp) -> int {
+  return fp.significand_size;
+}
+template <typename T>
+inline auto get_significand_size(const dragonbox::decimal_fp<T>& fp) -> int {
+  return count_digits(fp.significand);
+}
+
+template <typename Char, typename OutputIt>
+constexpr auto write_significand(OutputIt out, const char* significand,
+                                 int significand_size) -> OutputIt {
+  return copy_str<Char>(significand, significand + significand_size, out);
+}
+template <typename Char, typename OutputIt, typename UInt>
+inline auto write_significand(OutputIt out, UInt significand,
+                              int significand_size) -> OutputIt {
+  return format_decimal<Char>(out, significand, significand_size).end;
+}
+template <typename Char, typename OutputIt, typename T, typename Grouping>
+FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
+                                       int significand_size, int exponent,
+                                       const Grouping& grouping) -> OutputIt {
+  if (!grouping.separator()) {
+    out = write_significand<Char>(out, significand, significand_size);
+    return detail::fill_n(out, exponent, static_cast<Char>('0'));
+  }
+  auto buffer = memory_buffer();
+  write_significand<char>(appender(buffer), significand, significand_size);
+  detail::fill_n(appender(buffer), exponent, '0');
+  return grouping.apply(out, string_view(buffer.data(), buffer.size()));
+}
+
+template <typename Char, typename UInt,
+          FMT_ENABLE_IF(std::is_integral<UInt>::value)>
+inline auto write_significand(Char* out, UInt significand, int significand_size,
+                              int integral_size, Char decimal_point) -> Char* {
+  if (!decimal_point)
+    return format_decimal(out, significand, significand_size).end;
+  out += significand_size + 1;
+  Char* end = out;
+  int floating_size = significand_size - integral_size;
+  for (int i = floating_size / 2; i > 0; --i) {
+    out -= 2;
+    copy2(out, digits2(significand % 100));
+    significand /= 100;
+  }
+  if (floating_size % 2 != 0) {
+    *--out = static_cast<Char>('0' + significand % 10);
+    significand /= 10;
+  }
+  *--out = decimal_point;
+  format_decimal(out - integral_size, significand, integral_size);
+  return end;
+}
+
+template <typename OutputIt, typename UInt, typename Char,
+          FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<OutputIt>>::value)>
+inline auto write_significand(OutputIt out, UInt significand,
+                              int significand_size, int integral_size,
+                              Char decimal_point) -> OutputIt {
+  // Buffer is large enough to hold digits (digits10 + 1) and a decimal point.
+  Char buffer[digits10<UInt>() + 2];
+  auto end = write_significand(buffer, significand, significand_size,
+                               integral_size, decimal_point);
+  return detail::copy_str_noinline<Char>(buffer, end, out);
+}
+
+template <typename OutputIt, typename Char>
+FMT_CONSTEXPR auto write_significand(OutputIt out, const char* significand,
+                                     int significand_size, int integral_size,
+                                     Char decimal_point) -> OutputIt {
+  out = detail::copy_str_noinline<Char>(significand,
+                                        significand + integral_size, out);
+  if (!decimal_point) return out;
+  *out++ = decimal_point;
+  return detail::copy_str_noinline<Char>(significand + integral_size,
+                                         significand + significand_size, out);
+}
+
+template <typename OutputIt, typename Char, typename T, typename Grouping>
+FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
+                                       int significand_size, int integral_size,
+                                       Char decimal_point,
+                                       const Grouping& grouping) -> OutputIt {
+  if (!grouping.separator()) {
+    return write_significand(out, significand, significand_size, integral_size,
+                             decimal_point);
+  }
+  auto buffer = basic_memory_buffer<Char>();
+  write_significand(buffer_appender<Char>(buffer), significand,
+                    significand_size, integral_size, decimal_point);
+  grouping.apply(
+      out, basic_string_view<Char>(buffer.data(), to_unsigned(integral_size)));
+  return detail::copy_str_noinline<Char>(buffer.data() + integral_size,
+                                         buffer.end(), out);
+}
+
+template <typename OutputIt, typename DecimalFP, typename Char,
+          typename Grouping = digit_grouping<Char>>
+FMT_CONSTEXPR20 auto do_write_float(OutputIt out, const DecimalFP& fp,
+                                    const basic_format_specs<Char>& specs,
+                                    float_specs fspecs, locale_ref loc)
+    -> OutputIt {
+  auto significand = fp.significand;
+  int significand_size = get_significand_size(fp);
+  constexpr Char zero = static_cast<Char>('0');
+  auto sign = fspecs.sign;
+  size_t size = to_unsigned(significand_size) + (sign ? 1 : 0);
+  using iterator = reserve_iterator<OutputIt>;
+
+  Char decimal_point =
+      fspecs.locale ? detail::decimal_point<Char>(loc) : static_cast<Char>('.');
+
+  int output_exp = fp.exponent + significand_size - 1;
+  auto use_exp_format = [=]() {
+    if (fspecs.format == float_format::exp) return true;
+    if (fspecs.format != float_format::general) return false;
+    // Use the fixed notation if the exponent is in [exp_lower, exp_upper),
+    // e.g. 0.0001 instead of 1e-04. Otherwise use the exponent notation.
+    const int exp_lower = -4, exp_upper = 16;
+    return output_exp < exp_lower ||
+           output_exp >= (fspecs.precision > 0 ? fspecs.precision : exp_upper);
+  };
+  if (use_exp_format()) {
+    int num_zeros = 0;
+    if (fspecs.showpoint) {
+      num_zeros = fspecs.precision - significand_size;
+      if (num_zeros < 0) num_zeros = 0;
+      size += to_unsigned(num_zeros);
+    } else if (significand_size == 1) {
+      decimal_point = Char();
+    }
+    auto abs_output_exp = output_exp >= 0 ? output_exp : -output_exp;
+    int exp_digits = 2;
+    if (abs_output_exp >= 100) exp_digits = abs_output_exp >= 1000 ? 4 : 3;
+
+    size += to_unsigned((decimal_point ? 1 : 0) + 2 + exp_digits);
+    char exp_char = fspecs.upper ? 'E' : 'e';
+    auto write = [=](iterator it) {
+      if (sign) *it++ = detail::sign<Char>(sign);
+      // Insert a decimal point after the first digit and add an exponent.
+      it = write_significand(it, significand, significand_size, 1,
+                             decimal_point);
+      if (num_zeros > 0) it = detail::fill_n(it, num_zeros, zero);
+      *it++ = static_cast<Char>(exp_char);
+      return write_exponent<Char>(output_exp, it);
+    };
+    return specs.width > 0 ? write_padded<align::right>(out, specs, size, write)
+                           : base_iterator(out, write(reserve(out, size)));
+  }
+
+  int exp = fp.exponent + significand_size;
+  if (fp.exponent >= 0) {
+    // 1234e5 -> 123400000[.0+]
+    size += to_unsigned(fp.exponent);
+    int num_zeros = fspecs.precision - exp;
+#ifdef FMT_FUZZ
+    if (num_zeros > 5000)
+      throw std::runtime_error("fuzz mode - avoiding excessive cpu use");
+#endif
+    if (fspecs.showpoint) {
+      if (num_zeros <= 0 && fspecs.format != float_format::fixed) num_zeros = 1;
+      if (num_zeros > 0) size += to_unsigned(num_zeros) + 1;
+    }
+    auto grouping = Grouping(loc, fspecs.locale);
+    size += to_unsigned(grouping.count_separators(significand_size));
+    return write_padded<align::right>(out, specs, size, [&](iterator it) {
+      if (sign) *it++ = detail::sign<Char>(sign);
+      it = write_significand<Char>(it, significand, significand_size,
+                                   fp.exponent, grouping);
+      if (!fspecs.showpoint) return it;
+      *it++ = decimal_point;
+      return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
+    });
+  } else if (exp > 0) {
+    // 1234e-2 -> 12.34[0+]
+    int num_zeros = fspecs.showpoint ? fspecs.precision - significand_size : 0;
+    size += 1 + to_unsigned(num_zeros > 0 ? num_zeros : 0);
+    auto grouping = Grouping(loc, fspecs.locale);
+    size += to_unsigned(grouping.count_separators(significand_size));
+    return write_padded<align::right>(out, specs, size, [&](iterator it) {
+      if (sign) *it++ = detail::sign<Char>(sign);
+      it = write_significand(it, significand, significand_size, exp,
+                             decimal_point, grouping);
+      return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
+    });
+  }
+  // 1234e-6 -> 0.001234
+  int num_zeros = -exp;
+  if (significand_size == 0 && fspecs.precision >= 0 &&
+      fspecs.precision < num_zeros) {
+    num_zeros = fspecs.precision;
+  }
+  bool pointy = num_zeros != 0 || significand_size != 0 || fspecs.showpoint;
+  size += 1 + (pointy ? 1 : 0) + to_unsigned(num_zeros);
+  return write_padded<align::right>(out, specs, size, [&](iterator it) {
+    if (sign) *it++ = detail::sign<Char>(sign);
+    *it++ = zero;
+    if (!pointy) return it;
+    *it++ = decimal_point;
+    it = detail::fill_n(it, num_zeros, zero);
+    return write_significand<Char>(it, significand, significand_size);
+  });
+}
+
+template <typename Char> class fallback_digit_grouping {
+ public:
+  constexpr fallback_digit_grouping(locale_ref, bool) {}
+
+  constexpr Char separator() const { return Char(); }
+
+  constexpr int count_separators(int) const { return 0; }
+
+  template <typename Out, typename C>
+  constexpr Out apply(Out out, basic_string_view<C>) const {
+    return out;
+  }
+};
+
+template <typename OutputIt, typename DecimalFP, typename Char>
+FMT_CONSTEXPR20 auto write_float(OutputIt out, const DecimalFP& fp,
+                                 const basic_format_specs<Char>& specs,
+                                 float_specs fspecs, locale_ref loc)
+    -> OutputIt {
+  if (is_constant_evaluated()) {
+    return do_write_float<OutputIt, DecimalFP, Char,
+                          fallback_digit_grouping<Char>>(out, fp, specs, fspecs,
+                                                         loc);
+  } else {
+    return do_write_float(out, fp, specs, fspecs, loc);
+  }
+}
+
+template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+FMT_CONSTEXPR20 bool isinf(T value) {
+  if (is_constant_evaluated()) {
+#if defined(__cpp_if_constexpr)
+    if constexpr (std::numeric_limits<double>::is_iec559) {
+      auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
+      constexpr auto significand_bits =
+          dragonbox::float_info<double>::significand_bits;
+      return (bits & exponent_mask<double>()) &&
+             !(bits & ((uint64_t(1) << significand_bits) - 1));
+    }
+#endif
+  }
+  return std::isinf(value);
+}
+
+template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+FMT_CONSTEXPR20 bool isfinite(T value) {
+  if (is_constant_evaluated()) {
+#if defined(__cpp_if_constexpr)
+    if constexpr (std::numeric_limits<double>::is_iec559) {
+      auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
+      return (bits & exponent_mask<double>()) != exponent_mask<double>();
+    }
+#endif
+  }
+  return std::isfinite(value);
+}
+
+template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+FMT_INLINE FMT_CONSTEXPR bool signbit(T value) {
+  if (is_constant_evaluated()) {
+#ifdef __cpp_if_constexpr
+    if constexpr (std::numeric_limits<double>::is_iec559) {
+      auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
+      return (bits & (uint64_t(1) << (num_bits<uint64_t>() - 1))) != 0;
+    }
+#endif
+  }
+  return std::signbit(value);
+}
+
+template <typename Char, typename OutputIt, typename T,
+          FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+FMT_CONSTEXPR20 auto write(OutputIt out, T value,
+                           basic_format_specs<Char> specs, locale_ref loc = {})
+    -> OutputIt {
+  if (const_check(!is_supported_floating_point(value))) return out;
+  float_specs fspecs = parse_float_type_spec(specs);
+  fspecs.sign = specs.sign;
+  if (detail::signbit(value)) {  // value < 0 is false for NaN so use signbit.
+    fspecs.sign = sign::minus;
+    value = -value;
+  } else if (fspecs.sign == sign::minus) {
+    fspecs.sign = sign::none;
+  }
+
+  if (!detail::isfinite(value))
+    return write_nonfinite(out, detail::isinf(value), specs, fspecs);
+
+  if (specs.align == align::numeric && fspecs.sign) {
+    auto it = reserve(out, 1);
+    *it++ = detail::sign<Char>(fspecs.sign);
+    out = base_iterator(out, it);
+    fspecs.sign = sign::none;
+    if (specs.width != 0) --specs.width;
+  }
+
+  memory_buffer buffer;
+  if (fspecs.format == float_format::hex) {
+    if (fspecs.sign) buffer.push_back(detail::sign<char>(fspecs.sign));
+    snprintf_float(promote_float(value), specs.precision, fspecs, buffer);
+    return write_bytes<align::right>(out, {buffer.data(), buffer.size()},
+                                     specs);
+  }
+  int precision = specs.precision >= 0 || specs.type == presentation_type::none
+                      ? specs.precision
+                      : 6;
+  if (fspecs.format == float_format::exp) {
+    if (precision == max_value<int>())
+      throw_format_error("number is too big");
+    else
+      ++precision;
+  }
+  if (const_check(std::is_same<T, float>())) fspecs.binary32 = true;
+  if (!is_fast_float<T>()) fspecs.fallback = true;
+  int exp = format_float(promote_float(value), precision, fspecs, buffer);
+  fspecs.precision = precision;
+  auto fp = big_decimal_fp{buffer.data(), static_cast<int>(buffer.size()), exp};
+  return write_float(out, fp, specs, fspecs, loc);
+}
+
+template <typename Char, typename OutputIt, typename T,
+          FMT_ENABLE_IF(is_fast_float<T>::value)>
+FMT_CONSTEXPR20 auto write(OutputIt out, T value) -> OutputIt {
+  if (is_constant_evaluated()) {
+    return write(out, value, basic_format_specs<Char>());
+  }
+
+  if (const_check(!is_supported_floating_point(value))) return out;
+
+  using floaty = conditional_t<std::is_same<T, long double>::value, double, T>;
+  using uint = typename dragonbox::float_info<floaty>::carrier_uint;
+  auto bits = bit_cast<uint>(value);
+
+  auto fspecs = float_specs();
+  if (detail::signbit(value)) {
+    fspecs.sign = sign::minus;
+    value = -value;
+  }
+
+  constexpr auto specs = basic_format_specs<Char>();
+  uint mask = exponent_mask<floaty>();
+  if ((bits & mask) == mask)
+    return write_nonfinite(out, std::isinf(value), specs, fspecs);
+
+  auto dec = dragonbox::to_decimal(static_cast<floaty>(value));
+  return write_float(out, dec, specs, fspecs, {});
+}
+
+template <typename Char, typename OutputIt, typename T,
+          FMT_ENABLE_IF(std::is_floating_point<T>::value &&
+                        !is_fast_float<T>::value)>
+inline auto write(OutputIt out, T value) -> OutputIt {
+  return write(out, value, basic_format_specs<Char>());
+}
+
+template <typename Char, typename OutputIt>
+auto write(OutputIt out, monostate, basic_format_specs<Char> = {},
+           locale_ref = {}) -> OutputIt {
+  FMT_ASSERT(false, "");
+  return out;
+}
+
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> value)
+    -> OutputIt {
+  auto it = reserve(out, value.size());
+  it = copy_str_noinline<Char>(value.begin(), value.end(), it);
+  return base_iterator(out, it);
+}
+
+template <typename Char, typename OutputIt, typename T,
+          FMT_ENABLE_IF(is_string<T>::value)>
+constexpr auto write(OutputIt out, const T& value) -> OutputIt {
+  return write<Char>(out, to_string_view(value));
+}
+
+template <typename Char, typename OutputIt, typename T,
+          FMT_ENABLE_IF(is_integral<T>::value &&
+                        !std::is_same<T, bool>::value &&
+                        !std::is_same<T, Char>::value)>
+FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
+  auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
+  bool negative = is_negative(value);
+  // Don't do -abs_value since it trips unsigned-integer-overflow sanitizer.
+  if (negative) abs_value = ~abs_value + 1;
+  int num_digits = count_digits(abs_value);
+  auto size = (negative ? 1 : 0) + static_cast<size_t>(num_digits);
+  auto it = reserve(out, size);
+  if (auto ptr = to_pointer<Char>(it, size)) {
+    if (negative) *ptr++ = static_cast<Char>('-');
+    format_decimal<Char>(ptr, abs_value, num_digits);
+    return out;
+  }
+  if (negative) *it++ = static_cast<Char>('-');
+  it = format_decimal<Char>(it, abs_value, num_digits).end;
+  return base_iterator(out, it);
+}
+
+// FMT_ENABLE_IF() condition separated to workaround an MSVC bug.
+template <
+    typename Char, typename OutputIt, typename T,
+    bool check =
+        std::is_enum<T>::value && !std::is_same<T, Char>::value &&
+        mapped_type_constant<T, basic_format_context<OutputIt, Char>>::value !=
+            type::custom_type,
+    FMT_ENABLE_IF(check)>
+FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
+  return write<Char>(
+      out, static_cast<typename std::underlying_type<T>::type>(value));
+}
+
+template <typename Char, typename OutputIt, typename T,
+          FMT_ENABLE_IF(std::is_same<T, bool>::value)>
+FMT_CONSTEXPR auto write(OutputIt out, T value,
+                         const basic_format_specs<Char>& specs = {},
+                         locale_ref = {}) -> OutputIt {
+  return specs.type != presentation_type::none &&
+                 specs.type != presentation_type::string
+             ? write(out, value ? 1 : 0, specs, {})
+             : write_bytes(out, value ? "true" : "false", specs);
+}
+
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write(OutputIt out, Char value) -> OutputIt {
+  auto it = reserve(out, 1);
+  *it++ = value;
+  return base_iterator(out, it);
+}
+
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR_CHAR_TRAITS auto write(OutputIt out, const Char* value)
+    -> OutputIt {
+  if (!value) {
+    throw_format_error("string pointer is null");
+  } else {
+    out = write(out, basic_string_view<Char>(value));
+  }
+  return out;
+}
+
+template <typename Char, typename OutputIt, typename T,
+          FMT_ENABLE_IF(std::is_same<T, void>::value)>
+auto write(OutputIt out, const T* value,
+           const basic_format_specs<Char>& specs = {}, locale_ref = {})
+    -> OutputIt {
+  check_pointer_type_spec(specs.type, error_handler());
+  return write_ptr<Char>(out, to_uintptr(value), &specs);
+}
+
+// A write overload that handles implicit conversions.
+template <typename Char, typename OutputIt, typename T,
+          typename Context = basic_format_context<OutputIt, Char>>
+FMT_CONSTEXPR auto write(OutputIt out, const T& value) -> enable_if_t<
+    std::is_class<T>::value && !is_string<T>::value &&
+        !std::is_same<T, Char>::value &&
+        !std::is_same<const T&,
+                      decltype(arg_mapper<Context>().map(value))>::value,
+    OutputIt> {
+  return write<Char>(out, arg_mapper<Context>().map(value));
+}
+
+template <typename Char, typename OutputIt, typename T,
+          typename Context = basic_format_context<OutputIt, Char>>
+FMT_CONSTEXPR auto write(OutputIt out, const T& value)
+    -> enable_if_t<mapped_type_constant<T, Context>::value == type::custom_type,
+                   OutputIt> {
+  using formatter_type =
+      conditional_t<has_formatter<T, Context>::value,
+                    typename Context::template formatter_type<T>,
+                    fallback_formatter<T, Char>>;
+  auto ctx = Context(out, {}, {});
+  return formatter_type().format(value, ctx);
+}
+
+// An argument visitor that formats the argument and writes it via the output
+// iterator. It's a class and not a generic lambda for compatibility with C++11.
+template <typename Char> struct default_arg_formatter {
+  using iterator = buffer_appender<Char>;
+  using context = buffer_context<Char>;
+
+  iterator out;
+  basic_format_args<context> args;
+  locale_ref loc;
+
+  template <typename T> auto operator()(T value) -> iterator {
+    return write<Char>(out, value);
+  }
+  auto operator()(typename basic_format_arg<context>::handle h) -> iterator {
+    basic_format_parse_context<Char> parse_ctx({});
+    context format_ctx(out, args, loc);
+    h.format(parse_ctx, format_ctx);
+    return format_ctx.out();
+  }
+};
+
+template <typename Char> struct arg_formatter {
+  using iterator = buffer_appender<Char>;
+  using context = buffer_context<Char>;
+
+  iterator out;
+  const basic_format_specs<Char>& specs;
+  locale_ref locale;
+
+  template <typename T>
+  FMT_CONSTEXPR FMT_INLINE auto operator()(T value) -> iterator {
+    return detail::write(out, value, specs, locale);
+  }
+  auto operator()(typename basic_format_arg<context>::handle) -> iterator {
+    // User-defined types are handled separately because they require access
+    // to the parse context.
+    return out;
+  }
+};
+
+template <typename Char> struct custom_formatter {
+  basic_format_parse_context<Char>& parse_ctx;
+  buffer_context<Char>& ctx;
+
+  void operator()(
+      typename basic_format_arg<buffer_context<Char>>::handle h) const {
+    h.format(parse_ctx, ctx);
+  }
+  template <typename T> void operator()(T) const {}
+};
+
+template <typename T>
+using is_integer =
+    bool_constant<is_integral<T>::value && !std::is_same<T, bool>::value &&
+                  !std::is_same<T, char>::value &&
+                  !std::is_same<T, wchar_t>::value>;
+
+template <typename ErrorHandler> class width_checker {
+ public:
+  explicit FMT_CONSTEXPR width_checker(ErrorHandler& eh) : handler_(eh) {}
+
+  template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
+  FMT_CONSTEXPR auto operator()(T value) -> unsigned long long {
+    if (is_negative(value)) handler_.on_error("negative width");
+    return static_cast<unsigned long long>(value);
+  }
+
+  template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
+  FMT_CONSTEXPR auto operator()(T) -> unsigned long long {
+    handler_.on_error("width is not integer");
+    return 0;
+  }
+
+ private:
+  ErrorHandler& handler_;
+};
+
+template <typename ErrorHandler> class precision_checker {
+ public:
+  explicit FMT_CONSTEXPR precision_checker(ErrorHandler& eh) : handler_(eh) {}
+
+  template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
+  FMT_CONSTEXPR auto operator()(T value) -> unsigned long long {
+    if (is_negative(value)) handler_.on_error("negative precision");
+    return static_cast<unsigned long long>(value);
+  }
+
+  template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
+  FMT_CONSTEXPR auto operator()(T) -> unsigned long long {
+    handler_.on_error("precision is not integer");
+    return 0;
+  }
+
+ private:
+  ErrorHandler& handler_;
+};
+
+template <template <typename> class Handler, typename FormatArg,
+          typename ErrorHandler>
+FMT_CONSTEXPR auto get_dynamic_spec(FormatArg arg, ErrorHandler eh) -> int {
+  unsigned long long value = visit_format_arg(Handler<ErrorHandler>(eh), arg);
+  if (value > to_unsigned(max_value<int>())) eh.on_error("number is too big");
+  return static_cast<int>(value);
+}
+
+template <typename Context, typename ID>
+FMT_CONSTEXPR auto get_arg(Context& ctx, ID id) ->
+    typename Context::format_arg {
+  auto arg = ctx.arg(id);
+  if (!arg) ctx.on_error("argument not found");
+  return arg;
+}
+
+// The standard format specifier handler with checking.
+template <typename Char> class specs_handler : public specs_setter<Char> {
+ private:
+  basic_format_parse_context<Char>& parse_context_;
+  buffer_context<Char>& context_;
+
+  // This is only needed for compatibility with gcc 4.4.
+  using format_arg = basic_format_arg<buffer_context<Char>>;
+
+  FMT_CONSTEXPR auto get_arg(auto_id) -> format_arg {
+    return detail::get_arg(context_, parse_context_.next_arg_id());
+  }
+
+  FMT_CONSTEXPR auto get_arg(int arg_id) -> format_arg {
+    parse_context_.check_arg_id(arg_id);
+    return detail::get_arg(context_, arg_id);
+  }
+
+  FMT_CONSTEXPR auto get_arg(basic_string_view<Char> arg_id) -> format_arg {
+    parse_context_.check_arg_id(arg_id);
+    return detail::get_arg(context_, arg_id);
+  }
+
+ public:
+  FMT_CONSTEXPR specs_handler(basic_format_specs<Char>& specs,
+                              basic_format_parse_context<Char>& parse_ctx,
+                              buffer_context<Char>& ctx)
+      : specs_setter<Char>(specs), parse_context_(parse_ctx), context_(ctx) {}
+
+  template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
+    this->specs_.width = get_dynamic_spec<width_checker>(
+        get_arg(arg_id), context_.error_handler());
+  }
+
+  template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
+    this->specs_.precision = get_dynamic_spec<precision_checker>(
+        get_arg(arg_id), context_.error_handler());
+  }
+
+  void on_error(const char* message) { context_.on_error(message); }
+};
+
+template <template <typename> class Handler, typename Context>
+FMT_CONSTEXPR void handle_dynamic_spec(int& value,
+                                       arg_ref<typename Context::char_type> ref,
+                                       Context& ctx) {
+  switch (ref.kind) {
+  case arg_id_kind::none:
+    break;
+  case arg_id_kind::index:
+    value = detail::get_dynamic_spec<Handler>(ctx.arg(ref.val.index),
+                                              ctx.error_handler());
+    break;
+  case arg_id_kind::name:
+    value = detail::get_dynamic_spec<Handler>(ctx.arg(ref.val.name),
+                                              ctx.error_handler());
+    break;
+  }
+}
+
+#define FMT_STRING_IMPL(s, base, explicit)                                 \
+  [] {                                                                     \
+    /* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
+    /* Use a macro-like name to avoid shadowing warnings. */               \
+    struct FMT_GCC_VISIBILITY_HIDDEN FMT_COMPILE_STRING : base {           \
+      using char_type = fmt::remove_cvref_t<decltype(s[0])>;               \
+      FMT_MAYBE_UNUSED FMT_CONSTEXPR explicit                              \
+      operator fmt::basic_string_view<char_type>() const {                 \
+        return fmt::detail_exported::compile_string_to_view<char_type>(s); \
+      }                                                                    \
+    };                                                                     \
+    return FMT_COMPILE_STRING();                                           \
+  }()
+
+/**
+  \rst
+  Constructs a compile-time format string from a string literal *s*.
+
+  **Example**::
+
+    // A compile-time error because 'd' is an invalid specifier for strings.
+    std::string s = fmt::format(FMT_STRING("{:d}"), "foo");
+  \endrst
+ */
+#define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::compile_string, )
+
+#if FMT_USE_USER_DEFINED_LITERALS
+template <typename Char> struct udl_formatter {
+  basic_string_view<Char> str;
+
+  template <typename... T>
+  auto operator()(T&&... args) const -> std::basic_string<Char> {
+    return vformat(str, fmt::make_args_checked<T...>(str, args...));
+  }
+};
+
+#  if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+template <typename T, typename Char, size_t N,
+          fmt::detail_exported::fixed_string<Char, N> Str>
+struct statically_named_arg : view {
+  static constexpr auto name = Str.data;
+
+  const T& value;
+  statically_named_arg(const T& v) : value(v) {}
+};
+
+template <typename T, typename Char, size_t N,
+          fmt::detail_exported::fixed_string<Char, N> Str>
+struct is_named_arg<statically_named_arg<T, Char, N, Str>> : std::true_type {};
+
+template <typename T, typename Char, size_t N,
+          fmt::detail_exported::fixed_string<Char, N> Str>
+struct is_statically_named_arg<statically_named_arg<T, Char, N, Str>>
+    : std::true_type {};
+
+template <typename Char, size_t N,
+          fmt::detail_exported::fixed_string<Char, N> Str>
+struct udl_arg {
+  template <typename T> auto operator=(T&& value) const {
+    return statically_named_arg<T, Char, N, Str>(std::forward<T>(value));
+  }
+};
+#  else
+template <typename Char> struct udl_arg {
+  const Char* str;
+
+  template <typename T> auto operator=(T&& value) const -> named_arg<Char, T> {
+    return {str, std::forward<T>(value)};
+  }
+};
+#  endif
+#endif  // FMT_USE_USER_DEFINED_LITERALS
+
+template <typename Locale, typename Char>
+auto vformat(const Locale& loc, basic_string_view<Char> format_str,
+             basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> std::basic_string<Char> {
+  basic_memory_buffer<Char> buffer;
+  detail::vformat_to(buffer, format_str, args, detail::locale_ref(loc));
+  return {buffer.data(), buffer.size()};
+}
+
+using format_func = void (*)(detail::buffer<char>&, int, const char*);
+
+FMT_API void format_error_code(buffer<char>& out, int error_code,
+                               string_view message) FMT_NOEXCEPT;
+
+FMT_API void report_error(format_func func, int error_code,
+                          const char* message) FMT_NOEXCEPT;
+FMT_END_DETAIL_NAMESPACE
+
+FMT_API auto vsystem_error(int error_code, string_view format_str,
+                           format_args args) -> std::system_error;
+
+/**
+ \rst
+ Constructs :class:`std::system_error` with a message formatted with
+ ``fmt::format(fmt, args...)``.
+  *error_code* is a system error code as given by ``errno``.
+
+ **Example**::
+
+   // This throws std::system_error with the description
+   //   cannot open file 'madeup': No such file or directory
+   // or similar (system message may vary).
+   const char* filename = "madeup";
+   std::FILE* file = std::fopen(filename, "r");
+   if (!file)
+     throw fmt::system_error(errno, "cannot open file '{}'", filename);
+ \endrst
+*/
+template <typename... T>
+auto system_error(int error_code, format_string<T...> fmt, T&&... args)
+    -> std::system_error {
+  return vsystem_error(error_code, fmt, fmt::make_format_args(args...));
+}
+
+/**
+  \rst
+  Formats an error message for an error returned by an operating system or a
+  language runtime, for example a file opening error, and writes it to *out*.
+  The format is the same as the one used by ``std::system_error(ec, message)``
+  where ``ec`` is ``std::error_code(error_code, std::generic_category()})``.
+  It is implementation-defined but normally looks like:
+
+  .. parsed-literal::
+     *<message>*: *<system-message>*
+
+  where *<message>* is the passed message and *<system-message>* is the system
+  message corresponding to the error code.
+  *error_code* is a system error code as given by ``errno``.
+  \endrst
+ */
+FMT_API void format_system_error(detail::buffer<char>& out, int error_code,
+                                 const char* message) FMT_NOEXCEPT;
+
+// Reports a system error without throwing an exception.
+// Can be used to report errors from destructors.
+FMT_API void report_system_error(int error_code,
+                                 const char* message) FMT_NOEXCEPT;
+
+/** Fast integer formatter. */
+class format_int {
+ private:
+  // Buffer should be large enough to hold all digits (digits10 + 1),
+  // a sign and a null character.
+  enum { buffer_size = std::numeric_limits<unsigned long long>::digits10 + 3 };
+  mutable char buffer_[buffer_size];
+  char* str_;
+
+  template <typename UInt> auto format_unsigned(UInt value) -> char* {
+    auto n = static_cast<detail::uint32_or_64_or_128_t<UInt>>(value);
+    return detail::format_decimal(buffer_, n, buffer_size - 1).begin;
+  }
+
+  template <typename Int> auto format_signed(Int value) -> char* {
+    auto abs_value = static_cast<detail::uint32_or_64_or_128_t<Int>>(value);
+    bool negative = value < 0;
+    if (negative) abs_value = 0 - abs_value;
+    auto begin = format_unsigned(abs_value);
+    if (negative) *--begin = '-';
+    return begin;
+  }
+
+ public:
+  explicit format_int(int value) : str_(format_signed(value)) {}
+  explicit format_int(long value) : str_(format_signed(value)) {}
+  explicit format_int(long long value) : str_(format_signed(value)) {}
+  explicit format_int(unsigned value) : str_(format_unsigned(value)) {}
+  explicit format_int(unsigned long value) : str_(format_unsigned(value)) {}
+  explicit format_int(unsigned long long value)
+      : str_(format_unsigned(value)) {}
+
+  /** Returns the number of characters written to the output buffer. */
+  auto size() const -> size_t {
+    return detail::to_unsigned(buffer_ - str_ + buffer_size - 1);
+  }
+
+  /**
+    Returns a pointer to the output buffer content. No terminating null
+    character is appended.
+   */
+  auto data() const -> const char* { return str_; }
+
+  /**
+    Returns a pointer to the output buffer content with terminating null
+    character appended.
+   */
+  auto c_str() const -> const char* {
+    buffer_[buffer_size - 1] = '\0';
+    return str_;
+  }
+
+  /**
+    \rst
+    Returns the content of the output buffer as an ``std::string``.
+    \endrst
+   */
+  auto str() const -> std::string { return std::string(str_, size()); }
+};
+
+template <typename T, typename Char>
+template <typename FormatContext>
+FMT_CONSTEXPR FMT_INLINE auto
+formatter<T, Char,
+          enable_if_t<detail::type_constant<T, Char>::value !=
+                      detail::type::custom_type>>::format(const T& val,
+                                                          FormatContext& ctx)
+    const -> decltype(ctx.out()) {
+  if (specs_.width_ref.kind != detail::arg_id_kind::none ||
+      specs_.precision_ref.kind != detail::arg_id_kind::none) {
+    auto specs = specs_;
+    detail::handle_dynamic_spec<detail::width_checker>(specs.width,
+                                                       specs.width_ref, ctx);
+    detail::handle_dynamic_spec<detail::precision_checker>(
+        specs.precision, specs.precision_ref, ctx);
+    return detail::write<Char>(ctx.out(), val, specs, ctx.locale());
+  }
+  return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
+}
+
+#define FMT_FORMAT_AS(Type, Base)                                        \
+  template <typename Char>                                               \
+  struct formatter<Type, Char> : formatter<Base, Char> {                 \
+    template <typename FormatContext>                                    \
+    auto format(Type const& val, FormatContext& ctx) const               \
+        -> decltype(ctx.out()) {                                         \
+      return formatter<Base, Char>::format(static_cast<Base>(val), ctx); \
+    }                                                                    \
+  }
+
+FMT_FORMAT_AS(signed char, int);
+FMT_FORMAT_AS(unsigned char, unsigned);
+FMT_FORMAT_AS(short, int);
+FMT_FORMAT_AS(unsigned short, unsigned);
+FMT_FORMAT_AS(long, long long);
+FMT_FORMAT_AS(unsigned long, unsigned long long);
+FMT_FORMAT_AS(Char*, const Char*);
+FMT_FORMAT_AS(std::basic_string<Char>, basic_string_view<Char>);
+FMT_FORMAT_AS(std::nullptr_t, const void*);
+FMT_FORMAT_AS(detail::byte, unsigned char);
+FMT_FORMAT_AS(detail::std_string_view<Char>, basic_string_view<Char>);
+
+template <typename Char>
+struct formatter<void*, Char> : formatter<const void*, Char> {
+  template <typename FormatContext>
+  auto format(void* val, FormatContext& ctx) const -> decltype(ctx.out()) {
+    return formatter<const void*, Char>::format(val, ctx);
+  }
+};
+
+template <typename Char, size_t N>
+struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {
+  template <typename FormatContext>
+  FMT_CONSTEXPR auto format(const Char* val, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    return formatter<basic_string_view<Char>, Char>::format(val, ctx);
+  }
+};
+
+// A formatter for types known only at run time such as variant alternatives.
+//
+// Usage:
+//   using variant = std::variant<int, std::string>;
+//   template <>
+//   struct formatter<variant>: dynamic_formatter<> {
+//     auto format(const variant& v, format_context& ctx) {
+//       return visit([&](const auto& val) {
+//           return dynamic_formatter<>::format(val, ctx);
+//       }, v);
+//     }
+//   };
+template <typename Char = char> class dynamic_formatter {
+ private:
+  detail::dynamic_format_specs<Char> specs_;
+  const Char* format_str_;
+
+  struct null_handler : detail::error_handler {
+    void on_align(align_t) {}
+    void on_sign(sign_t) {}
+    void on_hash() {}
+  };
+
+  template <typename Context> void handle_specs(Context& ctx) {
+    detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
+                                                       specs_.width_ref, ctx);
+    detail::handle_dynamic_spec<detail::precision_checker>(
+        specs_.precision, specs_.precision_ref, ctx);
+  }
+
+ public:
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    format_str_ = ctx.begin();
+    // Checks are deferred to formatting time when the argument type is known.
+    detail::dynamic_specs_handler<ParseContext> handler(specs_, ctx);
+    return detail::parse_format_specs(ctx.begin(), ctx.end(), handler);
+  }
+
+  template <typename T, typename FormatContext>
+  auto format(const T& val, FormatContext& ctx) -> decltype(ctx.out()) {
+    handle_specs(ctx);
+    detail::specs_checker<null_handler> checker(
+        null_handler(), detail::mapped_type_constant<T, FormatContext>::value);
+    checker.on_align(specs_.align);
+    if (specs_.sign != sign::none) checker.on_sign(specs_.sign);
+    if (specs_.alt) checker.on_hash();
+    if (specs_.precision >= 0) checker.end_precision();
+    return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
+  }
+};
+
+/**
+  \rst
+  Converts ``p`` to ``const void*`` for pointer formatting.
+
+  **Example**::
+
+    auto s = fmt::format("{}", fmt::ptr(p));
+  \endrst
+ */
+template <typename T> auto ptr(T p) -> const void* {
+  static_assert(std::is_pointer<T>::value, "");
+  return detail::bit_cast<const void*>(p);
+}
+template <typename T> auto ptr(const std::unique_ptr<T>& p) -> const void* {
+  return p.get();
+}
+template <typename T> auto ptr(const std::shared_ptr<T>& p) -> const void* {
+  return p.get();
+}
+
+class bytes {
+ private:
+  string_view data_;
+  friend struct formatter<bytes>;
+
+ public:
+  explicit bytes(string_view data) : data_(data) {}
+};
+
+template <> struct formatter<bytes> {
+ private:
+  detail::dynamic_format_specs<char> specs_;
+
+ public:
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    using handler_type = detail::dynamic_specs_handler<ParseContext>;
+    detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
+                                                detail::type::string_type);
+    auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
+    detail::check_string_type_spec(specs_.type, ctx.error_handler());
+    return it;
+  }
+
+  template <typename FormatContext>
+  auto format(bytes b, FormatContext& ctx) -> decltype(ctx.out()) {
+    detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
+                                                       specs_.width_ref, ctx);
+    detail::handle_dynamic_spec<detail::precision_checker>(
+        specs_.precision, specs_.precision_ref, ctx);
+    return detail::write_bytes(ctx.out(), b.data_, specs_);
+  }
+};
+
+// group_digits_view is not derived from view because it copies the argument.
+template <typename T> struct group_digits_view { T value; };
+
+/**
+  \rst
+  Returns a view that formats an integer value using ',' as a locale-independent
+  thousands separator.
+
+  **Example**::
+
+    fmt::print("{}", fmt::group_digits(12345));
+    // Output: "12,345"
+  \endrst
+ */
+template <typename T> auto group_digits(T value) -> group_digits_view<T> {
+  return {value};
+}
+
+template <typename T> struct formatter<group_digits_view<T>> : formatter<T> {
+ private:
+  detail::dynamic_format_specs<char> specs_;
+
+ public:
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    using handler_type = detail::dynamic_specs_handler<ParseContext>;
+    detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
+                                                detail::type::int_type);
+    auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
+    detail::check_string_type_spec(specs_.type, ctx.error_handler());
+    return it;
+  }
+
+  template <typename FormatContext>
+  auto format(group_digits_view<T> t, FormatContext& ctx)
+      -> decltype(ctx.out()) {
+    detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
+                                                       specs_.width_ref, ctx);
+    detail::handle_dynamic_spec<detail::precision_checker>(
+        specs_.precision, specs_.precision_ref, ctx);
+    return detail::write_int_localized(
+        ctx.out(), static_cast<detail::uint64_or_128_t<T>>(t.value), 0, specs_,
+        detail::digit_grouping<char>({"\3", ','}));
+  }
+};
+
+template <typename It, typename Sentinel, typename Char = char>
+struct join_view : detail::view {
+  It begin;
+  Sentinel end;
+  basic_string_view<Char> sep;
+
+  join_view(It b, Sentinel e, basic_string_view<Char> s)
+      : begin(b), end(e), sep(s) {}
+};
+
+template <typename It, typename Sentinel, typename Char>
+using arg_join FMT_DEPRECATED_ALIAS = join_view<It, Sentinel, Char>;
+
+template <typename It, typename Sentinel, typename Char>
+struct formatter<join_view<It, Sentinel, Char>, Char> {
+ private:
+  using value_type =
+#ifdef __cpp_lib_ranges
+      std::iter_value_t<It>;
+#else
+      typename std::iterator_traits<It>::value_type;
+#endif
+  using context = buffer_context<Char>;
+  using mapper = detail::arg_mapper<context>;
+
+  template <typename T, FMT_ENABLE_IF(has_formatter<T, context>::value)>
+  static auto map(const T& value) -> const T& {
+    return value;
+  }
+  template <typename T, FMT_ENABLE_IF(!has_formatter<T, context>::value)>
+  static auto map(const T& value) -> decltype(mapper().map(value)) {
+    return mapper().map(value);
+  }
+
+  using formatter_type =
+      conditional_t<is_formattable<value_type, Char>::value,
+                    formatter<remove_cvref_t<decltype(map(
+                                  std::declval<const value_type&>()))>,
+                              Char>,
+                    detail::fallback_formatter<value_type, Char>>;
+
+  formatter_type value_formatter_;
+
+ public:
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return value_formatter_.parse(ctx);
+  }
+
+  template <typename FormatContext>
+  auto format(const join_view<It, Sentinel, Char>& value, FormatContext& ctx)
+      -> decltype(ctx.out()) {
+    auto it = value.begin;
+    auto out = ctx.out();
+    if (it != value.end) {
+      out = value_formatter_.format(map(*it), ctx);
+      ++it;
+      while (it != value.end) {
+        out = detail::copy_str<Char>(value.sep.begin(), value.sep.end(), out);
+        ctx.advance_to(out);
+        out = value_formatter_.format(map(*it), ctx);
+        ++it;
+      }
+    }
+    return out;
+  }
+};
+
+/**
+  Returns a view that formats the iterator range `[begin, end)` with elements
+  separated by `sep`.
+ */
+template <typename It, typename Sentinel>
+auto join(It begin, Sentinel end, string_view sep) -> join_view<It, Sentinel> {
+  return {begin, end, sep};
+}
+
+/**
+  \rst
+  Returns a view that formats `range` with elements separated by `sep`.
+
+  **Example**::
+
+    std::vector<int> v = {1, 2, 3};
+    fmt::print("{}", fmt::join(v, ", "));
+    // Output: "1, 2, 3"
+
+  ``fmt::join`` applies passed format specifiers to the range elements::
+
+    fmt::print("{:02}", fmt::join(v, ", "));
+    // Output: "01, 02, 03"
+  \endrst
+ */
+template <typename Range>
+auto join(Range&& range, string_view sep)
+    -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>> {
+  return join(std::begin(range), std::end(range), sep);
+}
+
+/**
+  \rst
+  Converts *value* to ``std::string`` using the default format for type *T*.
+
+  **Example**::
+
+    #include <fmt/format.h>
+
+    std::string answer = fmt::to_string(42);
+  \endrst
+ */
+template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+inline auto to_string(const T& value) -> std::string {
+  auto result = std::string();
+  detail::write<char>(std::back_inserter(result), value);
+  return result;
+}
+
+template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+FMT_NODISCARD inline auto to_string(T value) -> std::string {
+  // The buffer should be large enough to store the number including the sign
+  // or "false" for bool.
+  constexpr int max_size = detail::digits10<T>() + 2;
+  char buffer[max_size > 5 ? static_cast<unsigned>(max_size) : 5];
+  char* begin = buffer;
+  return std::string(begin, detail::write<char>(begin, value));
+}
+
+template <typename Char, size_t SIZE>
+FMT_NODISCARD auto to_string(const basic_memory_buffer<Char, SIZE>& buf)
+    -> std::basic_string<Char> {
+  auto size = buf.size();
+  detail::assume(size < std::basic_string<Char>().max_size());
+  return std::basic_string<Char>(buf.data(), size);
+}
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+template <typename Char>
+void vformat_to(
+    buffer<Char>& buf, basic_string_view<Char> fmt,
+    basic_format_args<FMT_BUFFER_CONTEXT(type_identity_t<Char>)> args,
+    locale_ref loc) {
+  // workaround for msvc bug regarding name-lookup in module
+  // link names into function scope
+  using detail::arg_formatter;
+  using detail::buffer_appender;
+  using detail::custom_formatter;
+  using detail::default_arg_formatter;
+  using detail::get_arg;
+  using detail::locale_ref;
+  using detail::parse_format_specs;
+  using detail::specs_checker;
+  using detail::specs_handler;
+  using detail::to_unsigned;
+  using detail::type;
+  using detail::write;
+  auto out = buffer_appender<Char>(buf);
+  if (fmt.size() == 2 && equal2(fmt.data(), "{}")) {
+    auto arg = args.get(0);
+    if (!arg) error_handler().on_error("argument not found");
+    visit_format_arg(default_arg_formatter<Char>{out, args, loc}, arg);
+    return;
+  }
+
+  struct format_handler : error_handler {
+    basic_format_parse_context<Char> parse_context;
+    buffer_context<Char> context;
+
+    format_handler(buffer_appender<Char> out, basic_string_view<Char> str,
+                   basic_format_args<buffer_context<Char>> args, locale_ref loc)
+        : parse_context(str), context(out, args, loc) {}
+
+    void on_text(const Char* begin, const Char* end) {
+      auto text = basic_string_view<Char>(begin, to_unsigned(end - begin));
+      context.advance_to(write<Char>(context.out(), text));
+    }
+
+    FMT_CONSTEXPR auto on_arg_id() -> int {
+      return parse_context.next_arg_id();
+    }
+    FMT_CONSTEXPR auto on_arg_id(int id) -> int {
+      return parse_context.check_arg_id(id), id;
+    }
+    FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
+      int arg_id = context.arg_id(id);
+      if (arg_id < 0) on_error("argument not found");
+      return arg_id;
+    }
+
+    FMT_INLINE void on_replacement_field(int id, const Char*) {
+      auto arg = get_arg(context, id);
+      context.advance_to(visit_format_arg(
+          default_arg_formatter<Char>{context.out(), context.args(),
+                                      context.locale()},
+          arg));
+    }
+
+    auto on_format_specs(int id, const Char* begin, const Char* end)
+        -> const Char* {
+      auto arg = get_arg(context, id);
+      if (arg.type() == type::custom_type) {
+        parse_context.advance_to(parse_context.begin() +
+                                 (begin - &*parse_context.begin()));
+        visit_format_arg(custom_formatter<Char>{parse_context, context}, arg);
+        return parse_context.begin();
+      }
+      auto specs = basic_format_specs<Char>();
+      specs_checker<specs_handler<Char>> handler(
+          specs_handler<Char>(specs, parse_context, context), arg.type());
+      begin = parse_format_specs(begin, end, handler);
+      if (begin == end || *begin != '}')
+        on_error("missing '}' in format string");
+      auto f = arg_formatter<Char>{context.out(), specs, context.locale()};
+      context.advance_to(visit_format_arg(f, arg));
+      return begin;
+    }
+  };
+  detail::parse_format_string<false>(fmt, format_handler(out, fmt, args, loc));
+}
+
+#ifndef FMT_HEADER_ONLY
+extern template FMT_API auto thousands_sep_impl<char>(locale_ref)
+    -> thousands_sep_result<char>;
+extern template FMT_API auto thousands_sep_impl<wchar_t>(locale_ref)
+    -> thousands_sep_result<wchar_t>;
+extern template FMT_API auto decimal_point_impl(locale_ref) -> char;
+extern template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
+extern template auto format_float<double>(double value, int precision,
+                                          float_specs specs, buffer<char>& buf)
+    -> int;
+extern template auto format_float<long double>(long double value, int precision,
+                                               float_specs specs,
+                                               buffer<char>& buf) -> int;
+void snprintf_float(float, int, float_specs, buffer<char>&) = delete;
+extern template auto snprintf_float<double>(double value, int precision,
+                                            float_specs specs,
+                                            buffer<char>& buf) -> int;
+extern template auto snprintf_float<long double>(long double value,
+                                                 int precision,
+                                                 float_specs specs,
+                                                 buffer<char>& buf) -> int;
+#endif  // FMT_HEADER_ONLY
+
+FMT_END_DETAIL_NAMESPACE
+
+#if FMT_USE_USER_DEFINED_LITERALS
+inline namespace literals {
+/**
+  \rst
+  User-defined literal equivalent of :func:`fmt::arg`.
+
+  **Example**::
+
+    using namespace fmt::literals;
+    fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
+  \endrst
+ */
+#  if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+template <detail_exported::fixed_string Str>
+constexpr auto operator""_a()
+    -> detail::udl_arg<remove_cvref_t<decltype(Str.data[0])>,
+                       sizeof(Str.data) / sizeof(decltype(Str.data[0])), Str> {
+  return {};
+}
+#  else
+constexpr auto operator"" _a(const char* s, size_t) -> detail::udl_arg<char> {
+  return {s};
+}
+#  endif
+
+// DEPRECATED!
+// User-defined literal equivalent of fmt::format.
+FMT_DEPRECATED constexpr auto operator"" _format(const char* s, size_t n)
+    -> detail::udl_formatter<char> {
+  return {{s, n}};
+}
+}  // namespace literals
+#endif  // FMT_USE_USER_DEFINED_LITERALS
+
+template <typename Locale, FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
+inline auto vformat(const Locale& loc, string_view fmt, format_args args)
+    -> std::string {
+  return detail::vformat(loc, fmt, args);
+}
+
+template <typename Locale, typename... T,
+          FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
+inline auto format(const Locale& loc, format_string<T...> fmt, T&&... args)
+    -> std::string {
+  return vformat(loc, string_view(fmt), fmt::make_format_args(args...));
+}
+
+template <typename... T, size_t SIZE, typename Allocator>
+FMT_DEPRECATED auto format_to(basic_memory_buffer<char, SIZE, Allocator>& buf,
+                              format_string<T...> fmt, T&&... args)
+    -> appender {
+  detail::vformat_to(buf, string_view(fmt), fmt::make_format_args(args...));
+  return appender(buf);
+}
+
+template <typename OutputIt, typename Locale,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value&&
+                            detail::is_locale<Locale>::value)>
+auto vformat_to(OutputIt out, const Locale& loc, string_view fmt,
+                format_args args) -> OutputIt {
+  using detail::get_buffer;
+  auto&& buf = get_buffer<char>(out);
+  detail::vformat_to(buf, fmt, args, detail::locale_ref(loc));
+  return detail::get_iterator(buf);
+}
+
+template <typename OutputIt, typename Locale, typename... T,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value&&
+                            detail::is_locale<Locale>::value)>
+FMT_INLINE auto format_to(OutputIt out, const Locale& loc,
+                          format_string<T...> fmt, T&&... args) -> OutputIt {
+  return vformat_to(out, loc, fmt, fmt::make_format_args(args...));
+}
+
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#ifdef FMT_DEPRECATED_INCLUDE_XCHAR
+#  include "xchar.h"
+#endif
+
+#ifdef FMT_HEADER_ONLY
+#  define FMT_FUNC inline
+#  include "format-inl.h"
+#else
+#  define FMT_FUNC
+#endif
+
+#endif  // FMT_FORMAT_H_
diff --git a/3rdparty/fmt/include/fmt/locale.h b/3rdparty/fmt/include/fmt/locale.h
new file mode 100644
index 00000000..7571b526
--- /dev/null
+++ b/3rdparty/fmt/include/fmt/locale.h
@@ -0,0 +1,2 @@
+#include "xchar.h"
+#warning fmt/locale.h is deprecated, include fmt/format.h or fmt/xchar.h instead
diff --git a/3rdparty/fmt/include/fmt/os.h b/3rdparty/fmt/include/fmt/os.h
new file mode 100644
index 00000000..b64f8bbf
--- /dev/null
+++ b/3rdparty/fmt/include/fmt/os.h
@@ -0,0 +1,527 @@
+// Formatting library for C++ - optional OS-specific functionality
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_OS_H_
+#define FMT_OS_H_
+
+#include <cerrno>
+#include <clocale>  // locale_t
+#include <cstddef>
+#include <cstdio>
+#include <cstdlib>       // strtod_l
+#include <system_error>  // std::system_error
+
+#if defined __APPLE__ || defined(__FreeBSD__)
+#  include <xlocale.h>  // for LC_NUMERIC_MASK on OS X
+#endif
+
+#include "format.h"
+
+#ifndef FMT_USE_FCNTL
+// UWP doesn't provide _pipe.
+#  if FMT_HAS_INCLUDE("winapifamily.h")
+#    include <winapifamily.h>
+#  endif
+#  if (FMT_HAS_INCLUDE(<fcntl.h>) || defined(__APPLE__) || \
+       defined(__linux__)) &&                              \
+      (!defined(WINAPI_FAMILY) ||                          \
+       (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
+#    include <fcntl.h>  // for O_RDONLY
+#    define FMT_USE_FCNTL 1
+#  else
+#    define FMT_USE_FCNTL 0
+#  endif
+#endif
+
+#ifndef FMT_POSIX
+#  if defined(_WIN32) && !defined(__MINGW32__)
+// Fix warnings about deprecated symbols.
+#    define FMT_POSIX(call) _##call
+#  else
+#    define FMT_POSIX(call) call
+#  endif
+#endif
+
+// Calls to system functions are wrapped in FMT_SYSTEM for testability.
+#ifdef FMT_SYSTEM
+#  define FMT_POSIX_CALL(call) FMT_SYSTEM(call)
+#else
+#  define FMT_SYSTEM(call) ::call
+#  ifdef _WIN32
+// Fix warnings about deprecated symbols.
+#    define FMT_POSIX_CALL(call) ::_##call
+#  else
+#    define FMT_POSIX_CALL(call) ::call
+#  endif
+#endif
+
+// Retries the expression while it evaluates to error_result and errno
+// equals to EINTR.
+#ifndef _WIN32
+#  define FMT_RETRY_VAL(result, expression, error_result) \
+    do {                                                  \
+      (result) = (expression);                            \
+    } while ((result) == (error_result) && errno == EINTR)
+#else
+#  define FMT_RETRY_VAL(result, expression, error_result) result = (expression)
+#endif
+
+#define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1)
+
+FMT_BEGIN_NAMESPACE
+FMT_MODULE_EXPORT_BEGIN
+
+/**
+  \rst
+  A reference to a null-terminated string. It can be constructed from a C
+  string or ``std::string``.
+
+  You can use one of the following type aliases for common character types:
+
+  +---------------+-----------------------------+
+  | Type          | Definition                  |
+  +===============+=============================+
+  | cstring_view  | basic_cstring_view<char>    |
+  +---------------+-----------------------------+
+  | wcstring_view | basic_cstring_view<wchar_t> |
+  +---------------+-----------------------------+
+
+  This class is most useful as a parameter type to allow passing
+  different types of strings to a function, for example::
+
+    template <typename... Args>
+    std::string format(cstring_view format_str, const Args & ... args);
+
+    format("{}", 42);
+    format(std::string("{}"), 42);
+  \endrst
+ */
+template <typename Char> class basic_cstring_view {
+ private:
+  const Char* data_;
+
+ public:
+  /** Constructs a string reference object from a C string. */
+  basic_cstring_view(const Char* s) : data_(s) {}
+
+  /**
+    \rst
+    Constructs a string reference from an ``std::string`` object.
+    \endrst
+   */
+  basic_cstring_view(const std::basic_string<Char>& s) : data_(s.c_str()) {}
+
+  /** Returns the pointer to a C string. */
+  const Char* c_str() const { return data_; }
+};
+
+using cstring_view = basic_cstring_view<char>;
+using wcstring_view = basic_cstring_view<wchar_t>;
+
+template <typename Char> struct formatter<std::error_code, Char> {
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  template <typename FormatContext>
+  FMT_CONSTEXPR auto format(const std::error_code& ec, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    auto out = ctx.out();
+    out = detail::write_bytes(out, ec.category().name(),
+                              basic_format_specs<Char>());
+    out = detail::write<Char>(out, Char(':'));
+    out = detail::write<Char>(out, ec.value());
+    return out;
+  }
+};
+
+#ifdef _WIN32
+FMT_API const std::error_category& system_category() FMT_NOEXCEPT;
+
+FMT_BEGIN_DETAIL_NAMESPACE
+// A converter from UTF-16 to UTF-8.
+// It is only provided for Windows since other systems support UTF-8 natively.
+class utf16_to_utf8 {
+ private:
+  memory_buffer buffer_;
+
+ public:
+  utf16_to_utf8() {}
+  FMT_API explicit utf16_to_utf8(basic_string_view<wchar_t> s);
+  operator string_view() const { return string_view(&buffer_[0], size()); }
+  size_t size() const { return buffer_.size() - 1; }
+  const char* c_str() const { return &buffer_[0]; }
+  std::string str() const { return std::string(&buffer_[0], size()); }
+
+  // Performs conversion returning a system error code instead of
+  // throwing exception on conversion error. This method may still throw
+  // in case of memory allocation error.
+  FMT_API int convert(basic_string_view<wchar_t> s);
+};
+
+FMT_API void format_windows_error(buffer<char>& out, int error_code,
+                                  const char* message) FMT_NOEXCEPT;
+FMT_END_DETAIL_NAMESPACE
+
+FMT_API std::system_error vwindows_error(int error_code, string_view format_str,
+                                         format_args args);
+
+/**
+ \rst
+ Constructs a :class:`std::system_error` object with the description
+ of the form
+
+ .. parsed-literal::
+   *<message>*: *<system-message>*
+
+ where *<message>* is the formatted message and *<system-message>* is the
+ system message corresponding to the error code.
+ *error_code* is a Windows error code as given by ``GetLastError``.
+ If *error_code* is not a valid error code such as -1, the system message
+ will look like "error -1".
+
+ **Example**::
+
+   // This throws a system_error with the description
+   //   cannot open file 'madeup': The system cannot find the file specified.
+   // or similar (system message may vary).
+   const char *filename = "madeup";
+   LPOFSTRUCT of = LPOFSTRUCT();
+   HFILE file = OpenFile(filename, &of, OF_READ);
+   if (file == HFILE_ERROR) {
+     throw fmt::windows_error(GetLastError(),
+                              "cannot open file '{}'", filename);
+   }
+ \endrst
+*/
+template <typename... Args>
+std::system_error windows_error(int error_code, string_view message,
+                                const Args&... args) {
+  return vwindows_error(error_code, message, fmt::make_format_args(args...));
+}
+
+// Reports a Windows error without throwing an exception.
+// Can be used to report errors from destructors.
+FMT_API void report_windows_error(int error_code,
+                                  const char* message) FMT_NOEXCEPT;
+#else
+inline const std::error_category& system_category() FMT_NOEXCEPT {
+  return std::system_category();
+}
+#endif  // _WIN32
+
+// std::system is not available on some platforms such as iOS (#2248).
+#ifdef __OSX__
+template <typename S, typename... Args, typename Char = char_t<S>>
+void say(const S& format_str, Args&&... args) {
+  std::system(format("say \"{}\"", format(format_str, args...)).c_str());
+}
+#endif
+
+// A buffered file.
+class buffered_file {
+ private:
+  FILE* file_;
+
+  friend class file;
+
+  explicit buffered_file(FILE* f) : file_(f) {}
+
+ public:
+  buffered_file(const buffered_file&) = delete;
+  void operator=(const buffered_file&) = delete;
+
+  // Constructs a buffered_file object which doesn't represent any file.
+  buffered_file() FMT_NOEXCEPT : file_(nullptr) {}
+
+  // Destroys the object closing the file it represents if any.
+  FMT_API ~buffered_file() FMT_NOEXCEPT;
+
+ public:
+  buffered_file(buffered_file&& other) FMT_NOEXCEPT : file_(other.file_) {
+    other.file_ = nullptr;
+  }
+
+  buffered_file& operator=(buffered_file&& other) {
+    close();
+    file_ = other.file_;
+    other.file_ = nullptr;
+    return *this;
+  }
+
+  // Opens a file.
+  FMT_API buffered_file(cstring_view filename, cstring_view mode);
+
+  // Closes the file.
+  FMT_API void close();
+
+  // Returns the pointer to a FILE object representing this file.
+  FILE* get() const FMT_NOEXCEPT { return file_; }
+
+  // We place parentheses around fileno to workaround a bug in some versions
+  // of MinGW that define fileno as a macro.
+  FMT_API int(fileno)() const;
+
+  void vprint(string_view format_str, format_args args) {
+    fmt::vprint(file_, format_str, args);
+  }
+
+  template <typename... Args>
+  inline void print(string_view format_str, const Args&... args) {
+    vprint(format_str, fmt::make_format_args(args...));
+  }
+};
+
+#if FMT_USE_FCNTL
+// A file. Closed file is represented by a file object with descriptor -1.
+// Methods that are not declared with FMT_NOEXCEPT may throw
+// fmt::system_error in case of failure. Note that some errors such as
+// closing the file multiple times will cause a crash on Windows rather
+// than an exception. You can get standard behavior by overriding the
+// invalid parameter handler with _set_invalid_parameter_handler.
+class file {
+ private:
+  int fd_;  // File descriptor.
+
+  // Constructs a file object with a given descriptor.
+  explicit file(int fd) : fd_(fd) {}
+
+ public:
+  // Possible values for the oflag argument to the constructor.
+  enum {
+    RDONLY = FMT_POSIX(O_RDONLY),  // Open for reading only.
+    WRONLY = FMT_POSIX(O_WRONLY),  // Open for writing only.
+    RDWR = FMT_POSIX(O_RDWR),      // Open for reading and writing.
+    CREATE = FMT_POSIX(O_CREAT),   // Create if the file doesn't exist.
+    APPEND = FMT_POSIX(O_APPEND),  // Open in append mode.
+    TRUNC = FMT_POSIX(O_TRUNC)     // Truncate the content of the file.
+  };
+
+  // Constructs a file object which doesn't represent any file.
+  file() FMT_NOEXCEPT : fd_(-1) {}
+
+  // Opens a file and constructs a file object representing this file.
+  FMT_API file(cstring_view path, int oflag);
+
+ public:
+  file(const file&) = delete;
+  void operator=(const file&) = delete;
+
+  file(file&& other) FMT_NOEXCEPT : fd_(other.fd_) { other.fd_ = -1; }
+
+  // Move assignment is not noexcept because close may throw.
+  file& operator=(file&& other) {
+    close();
+    fd_ = other.fd_;
+    other.fd_ = -1;
+    return *this;
+  }
+
+  // Destroys the object closing the file it represents if any.
+  FMT_API ~file() FMT_NOEXCEPT;
+
+  // Returns the file descriptor.
+  int descriptor() const FMT_NOEXCEPT { return fd_; }
+
+  // Closes the file.
+  FMT_API void close();
+
+  // Returns the file size. The size has signed type for consistency with
+  // stat::st_size.
+  FMT_API long long size() const;
+
+  // Attempts to read count bytes from the file into the specified buffer.
+  FMT_API size_t read(void* buffer, size_t count);
+
+  // Attempts to write count bytes from the specified buffer to the file.
+  FMT_API size_t write(const void* buffer, size_t count);
+
+  // Duplicates a file descriptor with the dup function and returns
+  // the duplicate as a file object.
+  FMT_API static file dup(int fd);
+
+  // Makes fd be the copy of this file descriptor, closing fd first if
+  // necessary.
+  FMT_API void dup2(int fd);
+
+  // Makes fd be the copy of this file descriptor, closing fd first if
+  // necessary.
+  FMT_API void dup2(int fd, std::error_code& ec) FMT_NOEXCEPT;
+
+  // Creates a pipe setting up read_end and write_end file objects for reading
+  // and writing respectively.
+  FMT_API static void pipe(file& read_end, file& write_end);
+
+  // Creates a buffered_file object associated with this file and detaches
+  // this file object from the file.
+  FMT_API buffered_file fdopen(const char* mode);
+};
+
+// Returns the memory page size.
+long getpagesize();
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+struct buffer_size {
+  buffer_size() = default;
+  size_t value = 0;
+  buffer_size operator=(size_t val) const {
+    auto bs = buffer_size();
+    bs.value = val;
+    return bs;
+  }
+};
+
+struct ostream_params {
+  int oflag = file::WRONLY | file::CREATE | file::TRUNC;
+  size_t buffer_size = BUFSIZ > 32768 ? BUFSIZ : 32768;
+
+  ostream_params() {}
+
+  template <typename... T>
+  ostream_params(T... params, int new_oflag) : ostream_params(params...) {
+    oflag = new_oflag;
+  }
+
+  template <typename... T>
+  ostream_params(T... params, detail::buffer_size bs)
+      : ostream_params(params...) {
+    this->buffer_size = bs.value;
+  }
+
+// Intel has a bug that results in failure to deduce a constructor
+// for empty parameter packs.
+#  if defined(__INTEL_COMPILER) && __INTEL_COMPILER < 2000
+  ostream_params(int new_oflag) : oflag(new_oflag) {}
+  ostream_params(detail::buffer_size bs) : buffer_size(bs.value) {}
+#  endif
+};
+
+FMT_END_DETAIL_NAMESPACE
+
+// Added {} below to work around default constructor error known to
+// occur in Xcode versions 7.2.1 and 8.2.1.
+constexpr detail::buffer_size buffer_size{};
+
+/** A fast output stream which is not thread-safe. */
+class FMT_API ostream final : private detail::buffer<char> {
+ private:
+  file file_;
+
+  void grow(size_t) override;
+
+  ostream(cstring_view path, const detail::ostream_params& params)
+      : file_(path, params.oflag) {
+    set(new char[params.buffer_size], params.buffer_size);
+  }
+
+ public:
+  ostream(ostream&& other)
+      : detail::buffer<char>(other.data(), other.size(), other.capacity()),
+        file_(std::move(other.file_)) {
+    other.clear();
+    other.set(nullptr, 0);
+  }
+  ~ostream() {
+    flush();
+    delete[] data();
+  }
+
+  void flush() {
+    if (size() == 0) return;
+    file_.write(data(), size());
+    clear();
+  }
+
+  template <typename... T>
+  friend ostream output_file(cstring_view path, T... params);
+
+  void close() {
+    flush();
+    file_.close();
+  }
+
+  /**
+    Formats ``args`` according to specifications in ``fmt`` and writes the
+    output to the file.
+   */
+  template <typename... T> void print(format_string<T...> fmt, T&&... args) {
+    vformat_to(detail::buffer_appender<char>(*this), fmt,
+               fmt::make_format_args(args...));
+  }
+};
+
+/**
+  \rst
+  Opens a file for writing. Supported parameters passed in *params*:
+
+  * ``<integer>``: Flags passed to `open
+    <https://pubs.opengroup.org/onlinepubs/007904875/functions/open.html>`_
+    (``file::WRONLY | file::CREATE`` by default)
+  * ``buffer_size=<integer>``: Output buffer size
+
+  **Example**::
+
+    auto out = fmt::output_file("guide.txt");
+    out.print("Don't {}", "Panic");
+  \endrst
+ */
+template <typename... T>
+inline ostream output_file(cstring_view path, T... params) {
+  return {path, detail::ostream_params(params...)};
+}
+#endif  // FMT_USE_FCNTL
+
+#ifdef FMT_LOCALE
+// A "C" numeric locale.
+class locale {
+ private:
+#  ifdef _WIN32
+  using locale_t = _locale_t;
+
+  static void freelocale(locale_t loc) { _free_locale(loc); }
+
+  static double strtod_l(const char* nptr, char** endptr, _locale_t loc) {
+    return _strtod_l(nptr, endptr, loc);
+  }
+#  endif
+
+  locale_t locale_;
+
+ public:
+  using type = locale_t;
+  locale(const locale&) = delete;
+  void operator=(const locale&) = delete;
+
+  locale() {
+#  ifndef _WIN32
+    locale_ = FMT_SYSTEM(newlocale(LC_NUMERIC_MASK, "C", nullptr));
+#  else
+    locale_ = _create_locale(LC_NUMERIC, "C");
+#  endif
+    if (!locale_) FMT_THROW(system_error(errno, "cannot create locale"));
+  }
+  ~locale() { freelocale(locale_); }
+
+  type get() const { return locale_; }
+
+  // Converts string to floating-point number and advances str past the end
+  // of the parsed input.
+  FMT_DEPRECATED double strtod(const char*& str) const {
+    char* end = nullptr;
+    double result = strtod_l(str, &end, locale_);
+    str = end;
+    return result;
+  }
+};
+using Locale FMT_DEPRECATED_ALIAS = locale;
+#endif  // FMT_LOCALE
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_OS_H_
diff --git a/3rdparty/fmt/include/fmt/ostream.h b/3rdparty/fmt/include/fmt/ostream.h
new file mode 100644
index 00000000..3d716ece
--- /dev/null
+++ b/3rdparty/fmt/include/fmt/ostream.h
@@ -0,0 +1,135 @@
+// Formatting library for C++ - std::ostream support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_OSTREAM_H_
+#define FMT_OSTREAM_H_
+
+#include <ostream>
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+
+template <typename OutputIt, typename Char> class basic_printf_context;
+
+namespace detail {
+
+// Checks if T has a user-defined operator<<.
+template <typename T, typename Char, typename Enable = void>
+class is_streamable {
+ private:
+  template <typename U>
+  static auto test(int)
+      -> bool_constant<sizeof(std::declval<std::basic_ostream<Char>&>()
+                              << std::declval<U>()) != 0>;
+
+  template <typename> static auto test(...) -> std::false_type;
+
+  using result = decltype(test<T>(0));
+
+ public:
+  is_streamable() = default;
+
+  static const bool value = result::value;
+};
+
+// Formatting of built-in types and arrays is intentionally disabled because
+// it's handled by standard (non-ostream) formatters.
+template <typename T, typename Char>
+struct is_streamable<
+    T, Char,
+    enable_if_t<
+        std::is_arithmetic<T>::value || std::is_array<T>::value ||
+        std::is_pointer<T>::value || std::is_same<T, char8_type>::value ||
+        std::is_same<T, std::basic_string<Char>>::value ||
+        std::is_same<T, std_string_view<Char>>::value ||
+        (std::is_convertible<T, int>::value && !std::is_enum<T>::value)>>
+    : std::false_type {};
+
+// Write the content of buf to os.
+// It is a separate function rather than a part of vprint to simplify testing.
+template <typename Char>
+void write_buffer(std::basic_ostream<Char>& os, buffer<Char>& buf) {
+  const Char* buf_data = buf.data();
+  using unsigned_streamsize = std::make_unsigned<std::streamsize>::type;
+  unsigned_streamsize size = buf.size();
+  unsigned_streamsize max_size = to_unsigned(max_value<std::streamsize>());
+  do {
+    unsigned_streamsize n = size <= max_size ? size : max_size;
+    os.write(buf_data, static_cast<std::streamsize>(n));
+    buf_data += n;
+    size -= n;
+  } while (size != 0);
+}
+
+template <typename Char, typename T>
+void format_value(buffer<Char>& buf, const T& value,
+                  locale_ref loc = locale_ref()) {
+  auto&& format_buf = formatbuf<std::basic_streambuf<Char>>(buf);
+  auto&& output = std::basic_ostream<Char>(&format_buf);
+#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
+  if (loc) output.imbue(loc.get<std::locale>());
+#endif
+  output << value;
+  output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
+  buf.try_resize(buf.size());
+}
+
+// Formats an object of type T that has an overloaded ostream operator<<.
+template <typename T, typename Char>
+struct fallback_formatter<T, Char, enable_if_t<is_streamable<T, Char>::value>>
+    : private formatter<basic_string_view<Char>, Char> {
+  using formatter<basic_string_view<Char>, Char>::parse;
+
+  template <typename OutputIt>
+  auto format(const T& value, basic_format_context<OutputIt, Char>& ctx)
+      -> OutputIt {
+    auto buffer = basic_memory_buffer<Char>();
+    format_value(buffer, value, ctx.locale());
+    return formatter<basic_string_view<Char>, Char>::format(
+        {buffer.data(), buffer.size()}, ctx);
+  }
+
+  // DEPRECATED!
+  template <typename OutputIt>
+  auto format(const T& value, basic_printf_context<OutputIt, Char>& ctx)
+      -> OutputIt {
+    auto buffer = basic_memory_buffer<Char>();
+    format_value(buffer, value, ctx.locale());
+    return std::copy(buffer.begin(), buffer.end(), ctx.out());
+  }
+};
+}  // namespace detail
+
+FMT_MODULE_EXPORT
+template <typename Char>
+void vprint(std::basic_ostream<Char>& os, basic_string_view<Char> format_str,
+            basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  auto buffer = basic_memory_buffer<Char>();
+  detail::vformat_to(buffer, format_str, args);
+  detail::write_buffer(os, buffer);
+}
+
+/**
+  \rst
+  Prints formatted data to the stream *os*.
+
+  **Example**::
+
+    fmt::print(cerr, "Don't {}!", "panic");
+  \endrst
+ */
+FMT_MODULE_EXPORT
+template <typename S, typename... Args,
+          typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
+void print(std::basic_ostream<Char>& os, const S& format_str, Args&&... args) {
+  vprint(os, to_string_view(format_str),
+         fmt::make_args_checked<Args...>(format_str, args...));
+}
+FMT_END_NAMESPACE
+
+#endif  // FMT_OSTREAM_H_
diff --git a/3rdparty/fmt/include/fmt/printf.h b/3rdparty/fmt/include/fmt/printf.h
new file mode 100644
index 00000000..19d550f6
--- /dev/null
+++ b/3rdparty/fmt/include/fmt/printf.h
@@ -0,0 +1,657 @@
+// Formatting library for C++ - legacy printf implementation
+//
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_PRINTF_H_
+#define FMT_PRINTF_H_
+
+#include <algorithm>  // std::max
+#include <limits>     // std::numeric_limits
+#include <ostream>
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+FMT_MODULE_EXPORT_BEGIN
+
+template <typename T> struct printf_formatter { printf_formatter() = delete; };
+
+template <typename Char>
+class basic_printf_parse_context : public basic_format_parse_context<Char> {
+  using basic_format_parse_context<Char>::basic_format_parse_context;
+};
+
+template <typename OutputIt, typename Char> class basic_printf_context {
+ private:
+  OutputIt out_;
+  basic_format_args<basic_printf_context> args_;
+
+ public:
+  using char_type = Char;
+  using format_arg = basic_format_arg<basic_printf_context>;
+  using parse_context_type = basic_printf_parse_context<Char>;
+  template <typename T> using formatter_type = printf_formatter<T>;
+
+  /**
+    \rst
+    Constructs a ``printf_context`` object. References to the arguments are
+    stored in the context object so make sure they have appropriate lifetimes.
+    \endrst
+   */
+  basic_printf_context(OutputIt out,
+                       basic_format_args<basic_printf_context> args)
+      : out_(out), args_(args) {}
+
+  OutputIt out() { return out_; }
+  void advance_to(OutputIt it) { out_ = it; }
+
+  detail::locale_ref locale() { return {}; }
+
+  format_arg arg(int id) const { return args_.get(id); }
+
+  FMT_CONSTEXPR void on_error(const char* message) {
+    detail::error_handler().on_error(message);
+  }
+};
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+// Checks if a value fits in int - used to avoid warnings about comparing
+// signed and unsigned integers.
+template <bool IsSigned> struct int_checker {
+  template <typename T> static bool fits_in_int(T value) {
+    unsigned max = max_value<int>();
+    return value <= max;
+  }
+  static bool fits_in_int(bool) { return true; }
+};
+
+template <> struct int_checker<true> {
+  template <typename T> static bool fits_in_int(T value) {
+    return value >= (std::numeric_limits<int>::min)() &&
+           value <= max_value<int>();
+  }
+  static bool fits_in_int(int) { return true; }
+};
+
+class printf_precision_handler {
+ public:
+  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+  int operator()(T value) {
+    if (!int_checker<std::numeric_limits<T>::is_signed>::fits_in_int(value))
+      FMT_THROW(format_error("number is too big"));
+    return (std::max)(static_cast<int>(value), 0);
+  }
+
+  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+  int operator()(T) {
+    FMT_THROW(format_error("precision is not integer"));
+    return 0;
+  }
+};
+
+// An argument visitor that returns true iff arg is a zero integer.
+class is_zero_int {
+ public:
+  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+  bool operator()(T value) {
+    return value == 0;
+  }
+
+  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+  bool operator()(T) {
+    return false;
+  }
+};
+
+template <typename T> struct make_unsigned_or_bool : std::make_unsigned<T> {};
+
+template <> struct make_unsigned_or_bool<bool> { using type = bool; };
+
+template <typename T, typename Context> class arg_converter {
+ private:
+  using char_type = typename Context::char_type;
+
+  basic_format_arg<Context>& arg_;
+  char_type type_;
+
+ public:
+  arg_converter(basic_format_arg<Context>& arg, char_type type)
+      : arg_(arg), type_(type) {}
+
+  void operator()(bool value) {
+    if (type_ != 's') operator()<bool>(value);
+  }
+
+  template <typename U, FMT_ENABLE_IF(std::is_integral<U>::value)>
+  void operator()(U value) {
+    bool is_signed = type_ == 'd' || type_ == 'i';
+    using target_type = conditional_t<std::is_same<T, void>::value, U, T>;
+    if (const_check(sizeof(target_type) <= sizeof(int))) {
+      // Extra casts are used to silence warnings.
+      if (is_signed) {
+        arg_ = detail::make_arg<Context>(
+            static_cast<int>(static_cast<target_type>(value)));
+      } else {
+        using unsigned_type = typename make_unsigned_or_bool<target_type>::type;
+        arg_ = detail::make_arg<Context>(
+            static_cast<unsigned>(static_cast<unsigned_type>(value)));
+      }
+    } else {
+      if (is_signed) {
+        // glibc's printf doesn't sign extend arguments of smaller types:
+        //   std::printf("%lld", -42);  // prints "4294967254"
+        // but we don't have to do the same because it's a UB.
+        arg_ = detail::make_arg<Context>(static_cast<long long>(value));
+      } else {
+        arg_ = detail::make_arg<Context>(
+            static_cast<typename make_unsigned_or_bool<U>::type>(value));
+      }
+    }
+  }
+
+  template <typename U, FMT_ENABLE_IF(!std::is_integral<U>::value)>
+  void operator()(U) {}  // No conversion needed for non-integral types.
+};
+
+// Converts an integer argument to T for printf, if T is an integral type.
+// If T is void, the argument is converted to corresponding signed or unsigned
+// type depending on the type specifier: 'd' and 'i' - signed, other -
+// unsigned).
+template <typename T, typename Context, typename Char>
+void convert_arg(basic_format_arg<Context>& arg, Char type) {
+  visit_format_arg(arg_converter<T, Context>(arg, type), arg);
+}
+
+// Converts an integer argument to char for printf.
+template <typename Context> class char_converter {
+ private:
+  basic_format_arg<Context>& arg_;
+
+ public:
+  explicit char_converter(basic_format_arg<Context>& arg) : arg_(arg) {}
+
+  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+  void operator()(T value) {
+    arg_ = detail::make_arg<Context>(
+        static_cast<typename Context::char_type>(value));
+  }
+
+  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+  void operator()(T) {}  // No conversion needed for non-integral types.
+};
+
+// An argument visitor that return a pointer to a C string if argument is a
+// string or null otherwise.
+template <typename Char> struct get_cstring {
+  template <typename T> const Char* operator()(T) { return nullptr; }
+  const Char* operator()(const Char* s) { return s; }
+};
+
+// Checks if an argument is a valid printf width specifier and sets
+// left alignment if it is negative.
+template <typename Char> class printf_width_handler {
+ private:
+  using format_specs = basic_format_specs<Char>;
+
+  format_specs& specs_;
+
+ public:
+  explicit printf_width_handler(format_specs& specs) : specs_(specs) {}
+
+  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+  unsigned operator()(T value) {
+    auto width = static_cast<uint32_or_64_or_128_t<T>>(value);
+    if (detail::is_negative(value)) {
+      specs_.align = align::left;
+      width = 0 - width;
+    }
+    unsigned int_max = max_value<int>();
+    if (width > int_max) FMT_THROW(format_error("number is too big"));
+    return static_cast<unsigned>(width);
+  }
+
+  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+  unsigned operator()(T) {
+    FMT_THROW(format_error("width is not integer"));
+    return 0;
+  }
+};
+
+// The ``printf`` argument formatter.
+template <typename OutputIt, typename Char>
+class printf_arg_formatter : public arg_formatter<Char> {
+ private:
+  using base = arg_formatter<Char>;
+  using context_type = basic_printf_context<OutputIt, Char>;
+  using format_specs = basic_format_specs<Char>;
+
+  context_type& context_;
+
+  OutputIt write_null_pointer(bool is_string = false) {
+    auto s = this->specs;
+    s.type = presentation_type::none;
+    return write_bytes(this->out, is_string ? "(null)" : "(nil)", s);
+  }
+
+ public:
+  printf_arg_formatter(OutputIt iter, format_specs& s, context_type& ctx)
+      : base{iter, s, locale_ref()}, context_(ctx) {}
+
+  OutputIt operator()(monostate value) { return base::operator()(value); }
+
+  template <typename T, FMT_ENABLE_IF(detail::is_integral<T>::value)>
+  OutputIt operator()(T value) {
+    // MSVC2013 fails to compile separate overloads for bool and Char so use
+    // std::is_same instead.
+    if (std::is_same<T, Char>::value) {
+      format_specs fmt_specs = this->specs;
+      if (fmt_specs.type != presentation_type::none &&
+          fmt_specs.type != presentation_type::chr) {
+        return (*this)(static_cast<int>(value));
+      }
+      fmt_specs.sign = sign::none;
+      fmt_specs.alt = false;
+      fmt_specs.fill[0] = ' ';  // Ignore '0' flag for char types.
+      // align::numeric needs to be overwritten here since the '0' flag is
+      // ignored for non-numeric types
+      if (fmt_specs.align == align::none || fmt_specs.align == align::numeric)
+        fmt_specs.align = align::right;
+      return write<Char>(this->out, static_cast<Char>(value), fmt_specs);
+    }
+    return base::operator()(value);
+  }
+
+  template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+  OutputIt operator()(T value) {
+    return base::operator()(value);
+  }
+
+  /** Formats a null-terminated C string. */
+  OutputIt operator()(const char* value) {
+    if (value) return base::operator()(value);
+    return write_null_pointer(this->specs.type != presentation_type::pointer);
+  }
+
+  /** Formats a null-terminated wide C string. */
+  OutputIt operator()(const wchar_t* value) {
+    if (value) return base::operator()(value);
+    return write_null_pointer(this->specs.type != presentation_type::pointer);
+  }
+
+  OutputIt operator()(basic_string_view<Char> value) {
+    return base::operator()(value);
+  }
+
+  /** Formats a pointer. */
+  OutputIt operator()(const void* value) {
+    return value ? base::operator()(value) : write_null_pointer();
+  }
+
+  /** Formats an argument of a custom (user-defined) type. */
+  OutputIt operator()(typename basic_format_arg<context_type>::handle handle) {
+    auto parse_ctx =
+        basic_printf_parse_context<Char>(basic_string_view<Char>());
+    handle.format(parse_ctx, context_);
+    return this->out;
+  }
+};
+
+template <typename Char>
+void parse_flags(basic_format_specs<Char>& specs, const Char*& it,
+                 const Char* end) {
+  for (; it != end; ++it) {
+    switch (*it) {
+    case '-':
+      specs.align = align::left;
+      break;
+    case '+':
+      specs.sign = sign::plus;
+      break;
+    case '0':
+      specs.fill[0] = '0';
+      break;
+    case ' ':
+      if (specs.sign != sign::plus) {
+        specs.sign = sign::space;
+      }
+      break;
+    case '#':
+      specs.alt = true;
+      break;
+    default:
+      return;
+    }
+  }
+}
+
+template <typename Char, typename GetArg>
+int parse_header(const Char*& it, const Char* end,
+                 basic_format_specs<Char>& specs, GetArg get_arg) {
+  int arg_index = -1;
+  Char c = *it;
+  if (c >= '0' && c <= '9') {
+    // Parse an argument index (if followed by '$') or a width possibly
+    // preceded with '0' flag(s).
+    int value = parse_nonnegative_int(it, end, -1);
+    if (it != end && *it == '$') {  // value is an argument index
+      ++it;
+      arg_index = value != -1 ? value : max_value<int>();
+    } else {
+      if (c == '0') specs.fill[0] = '0';
+      if (value != 0) {
+        // Nonzero value means that we parsed width and don't need to
+        // parse it or flags again, so return now.
+        if (value == -1) FMT_THROW(format_error("number is too big"));
+        specs.width = value;
+        return arg_index;
+      }
+    }
+  }
+  parse_flags(specs, it, end);
+  // Parse width.
+  if (it != end) {
+    if (*it >= '0' && *it <= '9') {
+      specs.width = parse_nonnegative_int(it, end, -1);
+      if (specs.width == -1) FMT_THROW(format_error("number is too big"));
+    } else if (*it == '*') {
+      ++it;
+      specs.width = static_cast<int>(visit_format_arg(
+          detail::printf_width_handler<Char>(specs), get_arg(-1)));
+    }
+  }
+  return arg_index;
+}
+
+template <typename Char, typename Context>
+void vprintf(buffer<Char>& buf, basic_string_view<Char> format,
+             basic_format_args<Context> args) {
+  using OutputIt = buffer_appender<Char>;
+  auto out = OutputIt(buf);
+  auto context = basic_printf_context<OutputIt, Char>(out, args);
+  auto parse_ctx = basic_printf_parse_context<Char>(format);
+
+  // Returns the argument with specified index or, if arg_index is -1, the next
+  // argument.
+  auto get_arg = [&](int arg_index) {
+    if (arg_index < 0)
+      arg_index = parse_ctx.next_arg_id();
+    else
+      parse_ctx.check_arg_id(--arg_index);
+    return detail::get_arg(context, arg_index);
+  };
+
+  const Char* start = parse_ctx.begin();
+  const Char* end = parse_ctx.end();
+  auto it = start;
+  while (it != end) {
+    if (!detail::find<false, Char>(it, end, '%', it)) {
+      it = end;  // detail::find leaves it == nullptr if it doesn't find '%'
+      break;
+    }
+    Char c = *it++;
+    if (it != end && *it == c) {
+      out = detail::write(
+          out, basic_string_view<Char>(start, detail::to_unsigned(it - start)));
+      start = ++it;
+      continue;
+    }
+    out = detail::write(out, basic_string_view<Char>(
+                                 start, detail::to_unsigned(it - 1 - start)));
+
+    basic_format_specs<Char> specs;
+    specs.align = align::right;
+
+    // Parse argument index, flags and width.
+    int arg_index = parse_header(it, end, specs, get_arg);
+    if (arg_index == 0) parse_ctx.on_error("argument not found");
+
+    // Parse precision.
+    if (it != end && *it == '.') {
+      ++it;
+      c = it != end ? *it : 0;
+      if ('0' <= c && c <= '9') {
+        specs.precision = parse_nonnegative_int(it, end, 0);
+      } else if (c == '*') {
+        ++it;
+        specs.precision = static_cast<int>(
+            visit_format_arg(detail::printf_precision_handler(), get_arg(-1)));
+      } else {
+        specs.precision = 0;
+      }
+    }
+
+    auto arg = get_arg(arg_index);
+    // For d, i, o, u, x, and X conversion specifiers, if a precision is
+    // specified, the '0' flag is ignored
+    if (specs.precision >= 0 && arg.is_integral())
+      specs.fill[0] =
+          ' ';  // Ignore '0' flag for non-numeric types or if '-' present.
+    if (specs.precision >= 0 && arg.type() == detail::type::cstring_type) {
+      auto str = visit_format_arg(detail::get_cstring<Char>(), arg);
+      auto str_end = str + specs.precision;
+      auto nul = std::find(str, str_end, Char());
+      arg = detail::make_arg<basic_printf_context<OutputIt, Char>>(
+          basic_string_view<Char>(
+              str, detail::to_unsigned(nul != str_end ? nul - str
+                                                      : specs.precision)));
+    }
+    if (specs.alt && visit_format_arg(detail::is_zero_int(), arg))
+      specs.alt = false;
+    if (specs.fill[0] == '0') {
+      if (arg.is_arithmetic() && specs.align != align::left)
+        specs.align = align::numeric;
+      else
+        specs.fill[0] = ' ';  // Ignore '0' flag for non-numeric types or if '-'
+                              // flag is also present.
+    }
+
+    // Parse length and convert the argument to the required type.
+    c = it != end ? *it++ : 0;
+    Char t = it != end ? *it : 0;
+    using detail::convert_arg;
+    switch (c) {
+    case 'h':
+      if (t == 'h') {
+        ++it;
+        t = it != end ? *it : 0;
+        convert_arg<signed char>(arg, t);
+      } else {
+        convert_arg<short>(arg, t);
+      }
+      break;
+    case 'l':
+      if (t == 'l') {
+        ++it;
+        t = it != end ? *it : 0;
+        convert_arg<long long>(arg, t);
+      } else {
+        convert_arg<long>(arg, t);
+      }
+      break;
+    case 'j':
+      convert_arg<intmax_t>(arg, t);
+      break;
+    case 'z':
+      convert_arg<size_t>(arg, t);
+      break;
+    case 't':
+      convert_arg<std::ptrdiff_t>(arg, t);
+      break;
+    case 'L':
+      // printf produces garbage when 'L' is omitted for long double, no
+      // need to do the same.
+      break;
+    default:
+      --it;
+      convert_arg<void>(arg, c);
+    }
+
+    // Parse type.
+    if (it == end) FMT_THROW(format_error("invalid format string"));
+    char type = static_cast<char>(*it++);
+    if (arg.is_integral()) {
+      // Normalize type.
+      switch (type) {
+      case 'i':
+      case 'u':
+        type = 'd';
+        break;
+      case 'c':
+        visit_format_arg(
+            detail::char_converter<basic_printf_context<OutputIt, Char>>(arg),
+            arg);
+        break;
+      }
+    }
+    specs.type = parse_presentation_type(type);
+    if (specs.type == presentation_type::none)
+      parse_ctx.on_error("invalid type specifier");
+
+    start = it;
+
+    // Format argument.
+    out = visit_format_arg(
+        detail::printf_arg_formatter<OutputIt, Char>(out, specs, context), arg);
+  }
+  detail::write(out, basic_string_view<Char>(start, to_unsigned(it - start)));
+}
+FMT_END_DETAIL_NAMESPACE
+
+template <typename Char>
+using basic_printf_context_t =
+    basic_printf_context<detail::buffer_appender<Char>, Char>;
+
+using printf_context = basic_printf_context_t<char>;
+using wprintf_context = basic_printf_context_t<wchar_t>;
+
+using printf_args = basic_format_args<printf_context>;
+using wprintf_args = basic_format_args<wprintf_context>;
+
+/**
+  \rst
+  Constructs an `~fmt::format_arg_store` object that contains references to
+  arguments and can be implicitly converted to `~fmt::printf_args`.
+  \endrst
+ */
+template <typename... T>
+inline auto make_printf_args(const T&... args)
+    -> format_arg_store<printf_context, T...> {
+  return {args...};
+}
+
+/**
+  \rst
+  Constructs an `~fmt::format_arg_store` object that contains references to
+  arguments and can be implicitly converted to `~fmt::wprintf_args`.
+  \endrst
+ */
+template <typename... T>
+inline auto make_wprintf_args(const T&... args)
+    -> format_arg_store<wprintf_context, T...> {
+  return {args...};
+}
+
+template <typename S, typename Char = char_t<S>>
+inline auto vsprintf(
+    const S& fmt,
+    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
+    -> std::basic_string<Char> {
+  basic_memory_buffer<Char> buffer;
+  vprintf(buffer, to_string_view(fmt), args);
+  return to_string(buffer);
+}
+
+/**
+  \rst
+  Formats arguments and returns the result as a string.
+
+  **Example**::
+
+    std::string message = fmt::sprintf("The answer is %d", 42);
+  \endrst
+*/
+template <typename S, typename... T,
+          typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
+inline auto sprintf(const S& fmt, const T&... args) -> std::basic_string<Char> {
+  using context = basic_printf_context_t<Char>;
+  return vsprintf(to_string_view(fmt), fmt::make_format_args<context>(args...));
+}
+
+template <typename S, typename Char = char_t<S>>
+inline auto vfprintf(
+    std::FILE* f, const S& fmt,
+    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
+    -> int {
+  basic_memory_buffer<Char> buffer;
+  vprintf(buffer, to_string_view(fmt), args);
+  size_t size = buffer.size();
+  return std::fwrite(buffer.data(), sizeof(Char), size, f) < size
+             ? -1
+             : static_cast<int>(size);
+}
+
+/**
+  \rst
+  Prints formatted data to the file *f*.
+
+  **Example**::
+
+    fmt::fprintf(stderr, "Don't %s!", "panic");
+  \endrst
+ */
+template <typename S, typename... T, typename Char = char_t<S>>
+inline auto fprintf(std::FILE* f, const S& fmt, const T&... args) -> int {
+  using context = basic_printf_context_t<Char>;
+  return vfprintf(f, to_string_view(fmt),
+                  fmt::make_format_args<context>(args...));
+}
+
+template <typename S, typename Char = char_t<S>>
+inline auto vprintf(
+    const S& fmt,
+    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
+    -> int {
+  return vfprintf(stdout, to_string_view(fmt), args);
+}
+
+/**
+  \rst
+  Prints formatted data to ``stdout``.
+
+  **Example**::
+
+    fmt::printf("Elapsed time: %.2f seconds", 1.23);
+  \endrst
+ */
+template <typename S, typename... T, FMT_ENABLE_IF(detail::is_string<S>::value)>
+inline auto printf(const S& fmt, const T&... args) -> int {
+  return vprintf(
+      to_string_view(fmt),
+      fmt::make_format_args<basic_printf_context_t<char_t<S>>>(args...));
+}
+
+template <typename S, typename Char = char_t<S>>
+FMT_DEPRECATED auto vfprintf(
+    std::basic_ostream<Char>& os, const S& fmt,
+    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
+    -> int {
+  basic_memory_buffer<Char> buffer;
+  vprintf(buffer, to_string_view(fmt), args);
+  os.write(buffer.data(), static_cast<std::streamsize>(buffer.size()));
+  return static_cast<int>(buffer.size());
+}
+template <typename S, typename... T, typename Char = char_t<S>>
+FMT_DEPRECATED auto fprintf(std::basic_ostream<Char>& os, const S& fmt,
+                            const T&... args) -> int {
+  return vfprintf(os, to_string_view(fmt),
+                  fmt::make_format_args<basic_printf_context_t<Char>>(args...));
+}
+
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_PRINTF_H_
diff --git a/3rdparty/fmt/include/fmt/ranges.h b/3rdparty/fmt/include/fmt/ranges.h
new file mode 100644
index 00000000..eb9fb8a9
--- /dev/null
+++ b/3rdparty/fmt/include/fmt/ranges.h
@@ -0,0 +1,793 @@
+// Formatting library for C++ - experimental range support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+//
+// Copyright (c) 2018 - present, Remotion (Igor Schulz)
+// All Rights Reserved
+// {fmt} support for ranges, containers and types tuple interface.
+
+#ifndef FMT_RANGES_H_
+#define FMT_RANGES_H_
+
+#include <initializer_list>
+#include <tuple>
+#include <type_traits>
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+
+namespace detail {
+
+template <typename RangeT, typename OutputIterator>
+OutputIterator copy(const RangeT& range, OutputIterator out) {
+  for (auto it = range.begin(), end = range.end(); it != end; ++it)
+    *out++ = *it;
+  return out;
+}
+
+template <typename OutputIterator>
+OutputIterator copy(const char* str, OutputIterator out) {
+  while (*str) *out++ = *str++;
+  return out;
+}
+
+template <typename OutputIterator>
+OutputIterator copy(char ch, OutputIterator out) {
+  *out++ = ch;
+  return out;
+}
+
+template <typename OutputIterator>
+OutputIterator copy(wchar_t ch, OutputIterator out) {
+  *out++ = ch;
+  return out;
+}
+
+// Returns true if T has a std::string-like interface, like std::string_view.
+template <typename T> class is_std_string_like {
+  template <typename U>
+  static auto check(U* p)
+      -> decltype((void)p->find('a'), p->length(), (void)p->data(), int());
+  template <typename> static void check(...);
+
+ public:
+  static FMT_CONSTEXPR_DECL const bool value =
+      is_string<T>::value ||
+      std::is_convertible<T, std_string_view<char>>::value ||
+      !std::is_void<decltype(check<T>(nullptr))>::value;
+};
+
+template <typename Char>
+struct is_std_string_like<fmt::basic_string_view<Char>> : std::true_type {};
+
+template <typename T> class is_map {
+  template <typename U> static auto check(U*) -> typename U::mapped_type;
+  template <typename> static void check(...);
+
+ public:
+#ifdef FMT_FORMAT_MAP_AS_LIST
+  static FMT_CONSTEXPR_DECL const bool value = false;
+#else
+  static FMT_CONSTEXPR_DECL const bool value =
+      !std::is_void<decltype(check<T>(nullptr))>::value;
+#endif
+};
+
+template <typename T> class is_set {
+  template <typename U> static auto check(U*) -> typename U::key_type;
+  template <typename> static void check(...);
+
+ public:
+#ifdef FMT_FORMAT_SET_AS_LIST
+  static FMT_CONSTEXPR_DECL const bool value = false;
+#else
+  static FMT_CONSTEXPR_DECL const bool value =
+      !std::is_void<decltype(check<T>(nullptr))>::value && !is_map<T>::value;
+#endif
+};
+
+template <typename... Ts> struct conditional_helper {};
+
+template <typename T, typename _ = void> struct is_range_ : std::false_type {};
+
+#if !FMT_MSC_VER || FMT_MSC_VER > 1800
+
+#  define FMT_DECLTYPE_RETURN(val)  \
+    ->decltype(val) { return val; } \
+    static_assert(                  \
+        true, "")  // This makes it so that a semicolon is required after the
+                   // macro, which helps clang-format handle the formatting.
+
+// C array overload
+template <typename T, std::size_t N>
+auto range_begin(const T (&arr)[N]) -> const T* {
+  return arr;
+}
+template <typename T, std::size_t N>
+auto range_end(const T (&arr)[N]) -> const T* {
+  return arr + N;
+}
+
+template <typename T, typename Enable = void>
+struct has_member_fn_begin_end_t : std::false_type {};
+
+template <typename T>
+struct has_member_fn_begin_end_t<T, void_t<decltype(std::declval<T>().begin()),
+                                           decltype(std::declval<T>().end())>>
+    : std::true_type {};
+
+// Member function overload
+template <typename T>
+auto range_begin(T&& rng) FMT_DECLTYPE_RETURN(static_cast<T&&>(rng).begin());
+template <typename T>
+auto range_end(T&& rng) FMT_DECLTYPE_RETURN(static_cast<T&&>(rng).end());
+
+// ADL overload. Only participates in overload resolution if member functions
+// are not found.
+template <typename T>
+auto range_begin(T&& rng)
+    -> enable_if_t<!has_member_fn_begin_end_t<T&&>::value,
+                   decltype(begin(static_cast<T&&>(rng)))> {
+  return begin(static_cast<T&&>(rng));
+}
+template <typename T>
+auto range_end(T&& rng) -> enable_if_t<!has_member_fn_begin_end_t<T&&>::value,
+                                       decltype(end(static_cast<T&&>(rng)))> {
+  return end(static_cast<T&&>(rng));
+}
+
+template <typename T, typename Enable = void>
+struct has_const_begin_end : std::false_type {};
+template <typename T, typename Enable = void>
+struct has_mutable_begin_end : std::false_type {};
+
+template <typename T>
+struct has_const_begin_end<
+    T,
+    void_t<
+        decltype(detail::range_begin(std::declval<const remove_cvref_t<T>&>())),
+        decltype(detail::range_end(std::declval<const remove_cvref_t<T>&>()))>>
+    : std::true_type {};
+
+template <typename T>
+struct has_mutable_begin_end<
+    T, void_t<decltype(detail::range_begin(std::declval<T>())),
+              decltype(detail::range_end(std::declval<T>())),
+              enable_if_t<std::is_copy_constructible<T>::value>>>
+    : std::true_type {};
+
+template <typename T>
+struct is_range_<T, void>
+    : std::integral_constant<bool, (has_const_begin_end<T>::value ||
+                                    has_mutable_begin_end<T>::value)> {};
+#  undef FMT_DECLTYPE_RETURN
+#endif
+
+// tuple_size and tuple_element check.
+template <typename T> class is_tuple_like_ {
+  template <typename U>
+  static auto check(U* p) -> decltype(std::tuple_size<U>::value, int());
+  template <typename> static void check(...);
+
+ public:
+  static FMT_CONSTEXPR_DECL const bool value =
+      !std::is_void<decltype(check<T>(nullptr))>::value;
+};
+
+// Check for integer_sequence
+#if defined(__cpp_lib_integer_sequence) || FMT_MSC_VER >= 1900
+template <typename T, T... N>
+using integer_sequence = std::integer_sequence<T, N...>;
+template <size_t... N> using index_sequence = std::index_sequence<N...>;
+template <size_t N> using make_index_sequence = std::make_index_sequence<N>;
+#else
+template <typename T, T... N> struct integer_sequence {
+  using value_type = T;
+
+  static FMT_CONSTEXPR size_t size() { return sizeof...(N); }
+};
+
+template <size_t... N> using index_sequence = integer_sequence<size_t, N...>;
+
+template <typename T, size_t N, T... Ns>
+struct make_integer_sequence : make_integer_sequence<T, N - 1, N - 1, Ns...> {};
+template <typename T, T... Ns>
+struct make_integer_sequence<T, 0, Ns...> : integer_sequence<T, Ns...> {};
+
+template <size_t N>
+using make_index_sequence = make_integer_sequence<size_t, N>;
+#endif
+
+template <class Tuple, class F, size_t... Is>
+void for_each(index_sequence<Is...>, Tuple&& tup, F&& f) FMT_NOEXCEPT {
+  using std::get;
+  // using free function get<I>(T) now.
+  const int _[] = {0, ((void)f(get<Is>(tup)), 0)...};
+  (void)_;  // blocks warnings
+}
+
+template <class T>
+FMT_CONSTEXPR make_index_sequence<std::tuple_size<T>::value> get_indexes(
+    T const&) {
+  return {};
+}
+
+template <class Tuple, class F> void for_each(Tuple&& tup, F&& f) {
+  const auto indexes = get_indexes(tup);
+  for_each(indexes, std::forward<Tuple>(tup), std::forward<F>(f));
+}
+
+template <typename Range>
+using value_type =
+    remove_cvref_t<decltype(*detail::range_begin(std::declval<Range>()))>;
+
+template <typename OutputIt> OutputIt write_delimiter(OutputIt out) {
+  *out++ = ',';
+  *out++ = ' ';
+  return out;
+}
+
+struct singleton {
+  unsigned char upper;
+  unsigned char lower_count;
+};
+
+inline auto is_printable(uint16_t x, const singleton* singletons,
+                         size_t singletons_size,
+                         const unsigned char* singleton_lowers,
+                         const unsigned char* normal, size_t normal_size)
+    -> bool {
+  auto upper = x >> 8;
+  auto lower_start = 0;
+  for (size_t i = 0; i < singletons_size; ++i) {
+    auto s = singletons[i];
+    auto lower_end = lower_start + s.lower_count;
+    if (upper < s.upper) break;
+    if (upper == s.upper) {
+      for (auto j = lower_start; j < lower_end; ++j) {
+        if (singleton_lowers[j] == (x & 0xff)) return false;
+      }
+    }
+    lower_start = lower_end;
+  }
+
+  auto xsigned = static_cast<int>(x);
+  auto current = true;
+  for (size_t i = 0; i < normal_size; ++i) {
+    auto v = static_cast<int>(normal[i]);
+    auto len = (v & 0x80) != 0 ? (v & 0x7f) << 8 | normal[++i] : v;
+    xsigned -= len;
+    if (xsigned < 0) break;
+    current = !current;
+  }
+  return current;
+}
+
+// Returns true iff the code point cp is printable.
+// This code is generated by support/printable.py.
+inline auto is_printable(uint32_t cp) -> bool {
+  static constexpr singleton singletons0[] = {
+      {0x00, 1},  {0x03, 5},  {0x05, 6},  {0x06, 3},  {0x07, 6},  {0x08, 8},
+      {0x09, 17}, {0x0a, 28}, {0x0b, 25}, {0x0c, 20}, {0x0d, 16}, {0x0e, 13},
+      {0x0f, 4},  {0x10, 3},  {0x12, 18}, {0x13, 9},  {0x16, 1},  {0x17, 5},
+      {0x18, 2},  {0x19, 3},  {0x1a, 7},  {0x1c, 2},  {0x1d, 1},  {0x1f, 22},
+      {0x20, 3},  {0x2b, 3},  {0x2c, 2},  {0x2d, 11}, {0x2e, 1},  {0x30, 3},
+      {0x31, 2},  {0x32, 1},  {0xa7, 2},  {0xa9, 2},  {0xaa, 4},  {0xab, 8},
+      {0xfa, 2},  {0xfb, 5},  {0xfd, 4},  {0xfe, 3},  {0xff, 9},
+  };
+  static constexpr unsigned char singletons0_lower[] = {
+      0xad, 0x78, 0x79, 0x8b, 0x8d, 0xa2, 0x30, 0x57, 0x58, 0x8b, 0x8c, 0x90,
+      0x1c, 0x1d, 0xdd, 0x0e, 0x0f, 0x4b, 0x4c, 0xfb, 0xfc, 0x2e, 0x2f, 0x3f,
+      0x5c, 0x5d, 0x5f, 0xb5, 0xe2, 0x84, 0x8d, 0x8e, 0x91, 0x92, 0xa9, 0xb1,
+      0xba, 0xbb, 0xc5, 0xc6, 0xc9, 0xca, 0xde, 0xe4, 0xe5, 0xff, 0x00, 0x04,
+      0x11, 0x12, 0x29, 0x31, 0x34, 0x37, 0x3a, 0x3b, 0x3d, 0x49, 0x4a, 0x5d,
+      0x84, 0x8e, 0x92, 0xa9, 0xb1, 0xb4, 0xba, 0xbb, 0xc6, 0xca, 0xce, 0xcf,
+      0xe4, 0xe5, 0x00, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a,
+      0x3b, 0x45, 0x46, 0x49, 0x4a, 0x5e, 0x64, 0x65, 0x84, 0x91, 0x9b, 0x9d,
+      0xc9, 0xce, 0xcf, 0x0d, 0x11, 0x29, 0x45, 0x49, 0x57, 0x64, 0x65, 0x8d,
+      0x91, 0xa9, 0xb4, 0xba, 0xbb, 0xc5, 0xc9, 0xdf, 0xe4, 0xe5, 0xf0, 0x0d,
+      0x11, 0x45, 0x49, 0x64, 0x65, 0x80, 0x84, 0xb2, 0xbc, 0xbe, 0xbf, 0xd5,
+      0xd7, 0xf0, 0xf1, 0x83, 0x85, 0x8b, 0xa4, 0xa6, 0xbe, 0xbf, 0xc5, 0xc7,
+      0xce, 0xcf, 0xda, 0xdb, 0x48, 0x98, 0xbd, 0xcd, 0xc6, 0xce, 0xcf, 0x49,
+      0x4e, 0x4f, 0x57, 0x59, 0x5e, 0x5f, 0x89, 0x8e, 0x8f, 0xb1, 0xb6, 0xb7,
+      0xbf, 0xc1, 0xc6, 0xc7, 0xd7, 0x11, 0x16, 0x17, 0x5b, 0x5c, 0xf6, 0xf7,
+      0xfe, 0xff, 0x80, 0x0d, 0x6d, 0x71, 0xde, 0xdf, 0x0e, 0x0f, 0x1f, 0x6e,
+      0x6f, 0x1c, 0x1d, 0x5f, 0x7d, 0x7e, 0xae, 0xaf, 0xbb, 0xbc, 0xfa, 0x16,
+      0x17, 0x1e, 0x1f, 0x46, 0x47, 0x4e, 0x4f, 0x58, 0x5a, 0x5c, 0x5e, 0x7e,
+      0x7f, 0xb5, 0xc5, 0xd4, 0xd5, 0xdc, 0xf0, 0xf1, 0xf5, 0x72, 0x73, 0x8f,
+      0x74, 0x75, 0x96, 0x2f, 0x5f, 0x26, 0x2e, 0x2f, 0xa7, 0xaf, 0xb7, 0xbf,
+      0xc7, 0xcf, 0xd7, 0xdf, 0x9a, 0x40, 0x97, 0x98, 0x30, 0x8f, 0x1f, 0xc0,
+      0xc1, 0xce, 0xff, 0x4e, 0x4f, 0x5a, 0x5b, 0x07, 0x08, 0x0f, 0x10, 0x27,
+      0x2f, 0xee, 0xef, 0x6e, 0x6f, 0x37, 0x3d, 0x3f, 0x42, 0x45, 0x90, 0x91,
+      0xfe, 0xff, 0x53, 0x67, 0x75, 0xc8, 0xc9, 0xd0, 0xd1, 0xd8, 0xd9, 0xe7,
+      0xfe, 0xff,
+  };
+  static constexpr singleton singletons1[] = {
+      {0x00, 6},  {0x01, 1}, {0x03, 1},  {0x04, 2}, {0x08, 8},  {0x09, 2},
+      {0x0a, 5},  {0x0b, 2}, {0x0e, 4},  {0x10, 1}, {0x11, 2},  {0x12, 5},
+      {0x13, 17}, {0x14, 1}, {0x15, 2},  {0x17, 2}, {0x19, 13}, {0x1c, 5},
+      {0x1d, 8},  {0x24, 1}, {0x6a, 3},  {0x6b, 2}, {0xbc, 2},  {0xd1, 2},
+      {0xd4, 12}, {0xd5, 9}, {0xd6, 2},  {0xd7, 2}, {0xda, 1},  {0xe0, 5},
+      {0xe1, 2},  {0xe8, 2}, {0xee, 32}, {0xf0, 4}, {0xf8, 2},  {0xf9, 2},
+      {0xfa, 2},  {0xfb, 1},
+  };
+  static constexpr unsigned char singletons1_lower[] = {
+      0x0c, 0x27, 0x3b, 0x3e, 0x4e, 0x4f, 0x8f, 0x9e, 0x9e, 0x9f, 0x06, 0x07,
+      0x09, 0x36, 0x3d, 0x3e, 0x56, 0xf3, 0xd0, 0xd1, 0x04, 0x14, 0x18, 0x36,
+      0x37, 0x56, 0x57, 0x7f, 0xaa, 0xae, 0xaf, 0xbd, 0x35, 0xe0, 0x12, 0x87,
+      0x89, 0x8e, 0x9e, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a,
+      0x45, 0x46, 0x49, 0x4a, 0x4e, 0x4f, 0x64, 0x65, 0x5c, 0xb6, 0xb7, 0x1b,
+      0x1c, 0x07, 0x08, 0x0a, 0x0b, 0x14, 0x17, 0x36, 0x39, 0x3a, 0xa8, 0xa9,
+      0xd8, 0xd9, 0x09, 0x37, 0x90, 0x91, 0xa8, 0x07, 0x0a, 0x3b, 0x3e, 0x66,
+      0x69, 0x8f, 0x92, 0x6f, 0x5f, 0xee, 0xef, 0x5a, 0x62, 0x9a, 0x9b, 0x27,
+      0x28, 0x55, 0x9d, 0xa0, 0xa1, 0xa3, 0xa4, 0xa7, 0xa8, 0xad, 0xba, 0xbc,
+      0xc4, 0x06, 0x0b, 0x0c, 0x15, 0x1d, 0x3a, 0x3f, 0x45, 0x51, 0xa6, 0xa7,
+      0xcc, 0xcd, 0xa0, 0x07, 0x19, 0x1a, 0x22, 0x25, 0x3e, 0x3f, 0xc5, 0xc6,
+      0x04, 0x20, 0x23, 0x25, 0x26, 0x28, 0x33, 0x38, 0x3a, 0x48, 0x4a, 0x4c,
+      0x50, 0x53, 0x55, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x63, 0x65, 0x66,
+      0x6b, 0x73, 0x78, 0x7d, 0x7f, 0x8a, 0xa4, 0xaa, 0xaf, 0xb0, 0xc0, 0xd0,
+      0xae, 0xaf, 0x79, 0xcc, 0x6e, 0x6f, 0x93,
+  };
+  static constexpr unsigned char normal0[] = {
+      0x00, 0x20, 0x5f, 0x22, 0x82, 0xdf, 0x04, 0x82, 0x44, 0x08, 0x1b, 0x04,
+      0x06, 0x11, 0x81, 0xac, 0x0e, 0x80, 0xab, 0x35, 0x28, 0x0b, 0x80, 0xe0,
+      0x03, 0x19, 0x08, 0x01, 0x04, 0x2f, 0x04, 0x34, 0x04, 0x07, 0x03, 0x01,
+      0x07, 0x06, 0x07, 0x11, 0x0a, 0x50, 0x0f, 0x12, 0x07, 0x55, 0x07, 0x03,
+      0x04, 0x1c, 0x0a, 0x09, 0x03, 0x08, 0x03, 0x07, 0x03, 0x02, 0x03, 0x03,
+      0x03, 0x0c, 0x04, 0x05, 0x03, 0x0b, 0x06, 0x01, 0x0e, 0x15, 0x05, 0x3a,
+      0x03, 0x11, 0x07, 0x06, 0x05, 0x10, 0x07, 0x57, 0x07, 0x02, 0x07, 0x15,
+      0x0d, 0x50, 0x04, 0x43, 0x03, 0x2d, 0x03, 0x01, 0x04, 0x11, 0x06, 0x0f,
+      0x0c, 0x3a, 0x04, 0x1d, 0x25, 0x5f, 0x20, 0x6d, 0x04, 0x6a, 0x25, 0x80,
+      0xc8, 0x05, 0x82, 0xb0, 0x03, 0x1a, 0x06, 0x82, 0xfd, 0x03, 0x59, 0x07,
+      0x15, 0x0b, 0x17, 0x09, 0x14, 0x0c, 0x14, 0x0c, 0x6a, 0x06, 0x0a, 0x06,
+      0x1a, 0x06, 0x59, 0x07, 0x2b, 0x05, 0x46, 0x0a, 0x2c, 0x04, 0x0c, 0x04,
+      0x01, 0x03, 0x31, 0x0b, 0x2c, 0x04, 0x1a, 0x06, 0x0b, 0x03, 0x80, 0xac,
+      0x06, 0x0a, 0x06, 0x21, 0x3f, 0x4c, 0x04, 0x2d, 0x03, 0x74, 0x08, 0x3c,
+      0x03, 0x0f, 0x03, 0x3c, 0x07, 0x38, 0x08, 0x2b, 0x05, 0x82, 0xff, 0x11,
+      0x18, 0x08, 0x2f, 0x11, 0x2d, 0x03, 0x20, 0x10, 0x21, 0x0f, 0x80, 0x8c,
+      0x04, 0x82, 0x97, 0x19, 0x0b, 0x15, 0x88, 0x94, 0x05, 0x2f, 0x05, 0x3b,
+      0x07, 0x02, 0x0e, 0x18, 0x09, 0x80, 0xb3, 0x2d, 0x74, 0x0c, 0x80, 0xd6,
+      0x1a, 0x0c, 0x05, 0x80, 0xff, 0x05, 0x80, 0xdf, 0x0c, 0xee, 0x0d, 0x03,
+      0x84, 0x8d, 0x03, 0x37, 0x09, 0x81, 0x5c, 0x14, 0x80, 0xb8, 0x08, 0x80,
+      0xcb, 0x2a, 0x38, 0x03, 0x0a, 0x06, 0x38, 0x08, 0x46, 0x08, 0x0c, 0x06,
+      0x74, 0x0b, 0x1e, 0x03, 0x5a, 0x04, 0x59, 0x09, 0x80, 0x83, 0x18, 0x1c,
+      0x0a, 0x16, 0x09, 0x4c, 0x04, 0x80, 0x8a, 0x06, 0xab, 0xa4, 0x0c, 0x17,
+      0x04, 0x31, 0xa1, 0x04, 0x81, 0xda, 0x26, 0x07, 0x0c, 0x05, 0x05, 0x80,
+      0xa5, 0x11, 0x81, 0x6d, 0x10, 0x78, 0x28, 0x2a, 0x06, 0x4c, 0x04, 0x80,
+      0x8d, 0x04, 0x80, 0xbe, 0x03, 0x1b, 0x03, 0x0f, 0x0d,
+  };
+  static constexpr unsigned char normal1[] = {
+      0x5e, 0x22, 0x7b, 0x05, 0x03, 0x04, 0x2d, 0x03, 0x66, 0x03, 0x01, 0x2f,
+      0x2e, 0x80, 0x82, 0x1d, 0x03, 0x31, 0x0f, 0x1c, 0x04, 0x24, 0x09, 0x1e,
+      0x05, 0x2b, 0x05, 0x44, 0x04, 0x0e, 0x2a, 0x80, 0xaa, 0x06, 0x24, 0x04,
+      0x24, 0x04, 0x28, 0x08, 0x34, 0x0b, 0x01, 0x80, 0x90, 0x81, 0x37, 0x09,
+      0x16, 0x0a, 0x08, 0x80, 0x98, 0x39, 0x03, 0x63, 0x08, 0x09, 0x30, 0x16,
+      0x05, 0x21, 0x03, 0x1b, 0x05, 0x01, 0x40, 0x38, 0x04, 0x4b, 0x05, 0x2f,
+      0x04, 0x0a, 0x07, 0x09, 0x07, 0x40, 0x20, 0x27, 0x04, 0x0c, 0x09, 0x36,
+      0x03, 0x3a, 0x05, 0x1a, 0x07, 0x04, 0x0c, 0x07, 0x50, 0x49, 0x37, 0x33,
+      0x0d, 0x33, 0x07, 0x2e, 0x08, 0x0a, 0x81, 0x26, 0x52, 0x4e, 0x28, 0x08,
+      0x2a, 0x56, 0x1c, 0x14, 0x17, 0x09, 0x4e, 0x04, 0x1e, 0x0f, 0x43, 0x0e,
+      0x19, 0x07, 0x0a, 0x06, 0x48, 0x08, 0x27, 0x09, 0x75, 0x0b, 0x3f, 0x41,
+      0x2a, 0x06, 0x3b, 0x05, 0x0a, 0x06, 0x51, 0x06, 0x01, 0x05, 0x10, 0x03,
+      0x05, 0x80, 0x8b, 0x62, 0x1e, 0x48, 0x08, 0x0a, 0x80, 0xa6, 0x5e, 0x22,
+      0x45, 0x0b, 0x0a, 0x06, 0x0d, 0x13, 0x39, 0x07, 0x0a, 0x36, 0x2c, 0x04,
+      0x10, 0x80, 0xc0, 0x3c, 0x64, 0x53, 0x0c, 0x48, 0x09, 0x0a, 0x46, 0x45,
+      0x1b, 0x48, 0x08, 0x53, 0x1d, 0x39, 0x81, 0x07, 0x46, 0x0a, 0x1d, 0x03,
+      0x47, 0x49, 0x37, 0x03, 0x0e, 0x08, 0x0a, 0x06, 0x39, 0x07, 0x0a, 0x81,
+      0x36, 0x19, 0x80, 0xb7, 0x01, 0x0f, 0x32, 0x0d, 0x83, 0x9b, 0x66, 0x75,
+      0x0b, 0x80, 0xc4, 0x8a, 0xbc, 0x84, 0x2f, 0x8f, 0xd1, 0x82, 0x47, 0xa1,
+      0xb9, 0x82, 0x39, 0x07, 0x2a, 0x04, 0x02, 0x60, 0x26, 0x0a, 0x46, 0x0a,
+      0x28, 0x05, 0x13, 0x82, 0xb0, 0x5b, 0x65, 0x4b, 0x04, 0x39, 0x07, 0x11,
+      0x40, 0x05, 0x0b, 0x02, 0x0e, 0x97, 0xf8, 0x08, 0x84, 0xd6, 0x2a, 0x09,
+      0xa2, 0xf7, 0x81, 0x1f, 0x31, 0x03, 0x11, 0x04, 0x08, 0x81, 0x8c, 0x89,
+      0x04, 0x6b, 0x05, 0x0d, 0x03, 0x09, 0x07, 0x10, 0x93, 0x60, 0x80, 0xf6,
+      0x0a, 0x73, 0x08, 0x6e, 0x17, 0x46, 0x80, 0x9a, 0x14, 0x0c, 0x57, 0x09,
+      0x19, 0x80, 0x87, 0x81, 0x47, 0x03, 0x85, 0x42, 0x0f, 0x15, 0x85, 0x50,
+      0x2b, 0x80, 0xd5, 0x2d, 0x03, 0x1a, 0x04, 0x02, 0x81, 0x70, 0x3a, 0x05,
+      0x01, 0x85, 0x00, 0x80, 0xd7, 0x29, 0x4c, 0x04, 0x0a, 0x04, 0x02, 0x83,
+      0x11, 0x44, 0x4c, 0x3d, 0x80, 0xc2, 0x3c, 0x06, 0x01, 0x04, 0x55, 0x05,
+      0x1b, 0x34, 0x02, 0x81, 0x0e, 0x2c, 0x04, 0x64, 0x0c, 0x56, 0x0a, 0x80,
+      0xae, 0x38, 0x1d, 0x0d, 0x2c, 0x04, 0x09, 0x07, 0x02, 0x0e, 0x06, 0x80,
+      0x9a, 0x83, 0xd8, 0x08, 0x0d, 0x03, 0x0d, 0x03, 0x74, 0x0c, 0x59, 0x07,
+      0x0c, 0x14, 0x0c, 0x04, 0x38, 0x08, 0x0a, 0x06, 0x28, 0x08, 0x22, 0x4e,
+      0x81, 0x54, 0x0c, 0x15, 0x03, 0x03, 0x05, 0x07, 0x09, 0x19, 0x07, 0x07,
+      0x09, 0x03, 0x0d, 0x07, 0x29, 0x80, 0xcb, 0x25, 0x0a, 0x84, 0x06,
+  };
+  auto lower = static_cast<uint16_t>(cp);
+  if (cp < 0x10000) {
+    return is_printable(lower, singletons0,
+                        sizeof(singletons0) / sizeof(*singletons0),
+                        singletons0_lower, normal0, sizeof(normal0));
+  }
+  if (cp < 0x20000) {
+    return is_printable(lower, singletons1,
+                        sizeof(singletons1) / sizeof(*singletons1),
+                        singletons1_lower, normal1, sizeof(normal1));
+  }
+  if (0x2a6de <= cp && cp < 0x2a700) return false;
+  if (0x2b735 <= cp && cp < 0x2b740) return false;
+  if (0x2b81e <= cp && cp < 0x2b820) return false;
+  if (0x2cea2 <= cp && cp < 0x2ceb0) return false;
+  if (0x2ebe1 <= cp && cp < 0x2f800) return false;
+  if (0x2fa1e <= cp && cp < 0x30000) return false;
+  if (0x3134b <= cp && cp < 0xe0100) return false;
+  if (0xe01f0 <= cp && cp < 0x110000) return false;
+  return cp < 0x110000;
+}
+
+inline auto needs_escape(uint32_t cp) -> bool {
+  return cp < 0x20 || cp == 0x7f || cp == '"' || cp == '\\' ||
+         !is_printable(cp);
+}
+
+template <typename Char> struct find_escape_result {
+  const Char* begin;
+  const Char* end;
+  uint32_t cp;
+};
+
+template <typename Char>
+auto find_escape(const Char* begin, const Char* end)
+    -> find_escape_result<Char> {
+  for (; begin != end; ++begin) {
+    auto cp = static_cast<typename std::make_unsigned<Char>::type>(*begin);
+    if (sizeof(Char) == 1 && cp >= 0x80) continue;
+    if (needs_escape(cp)) return {begin, begin + 1, cp};
+  }
+  return {begin, nullptr, 0};
+}
+
+inline auto find_escape(const char* begin, const char* end)
+    -> find_escape_result<char> {
+  if (!is_utf8()) return find_escape<char>(begin, end);
+  auto result = find_escape_result<char>{end, nullptr, 0};
+  for_each_codepoint(string_view(begin, to_unsigned(end - begin)),
+                     [&](uint32_t cp, string_view sv) {
+                       if (needs_escape(cp)) {
+                         result = {sv.begin(), sv.end(), cp};
+                         return false;
+                       }
+                       return true;
+                     });
+  return result;
+}
+
+template <typename Char, typename OutputIt>
+auto write_range_entry(OutputIt out, basic_string_view<Char> str) -> OutputIt {
+  *out++ = '"';
+  auto begin = str.begin(), end = str.end();
+  do {
+    auto escape = find_escape(begin, end);
+    out = copy_str<Char>(begin, escape.begin, out);
+    begin = escape.end;
+    if (!begin) break;
+    auto c = static_cast<Char>(escape.cp);
+    switch (escape.cp) {
+    case '\n':
+      *out++ = '\\';
+      c = 'n';
+      break;
+    case '\r':
+      *out++ = '\\';
+      c = 'r';
+      break;
+    case '\t':
+      *out++ = '\\';
+      c = 't';
+      break;
+    case '"':
+      FMT_FALLTHROUGH;
+    case '\\':
+      *out++ = '\\';
+      break;
+    default:
+      if (is_utf8()) {
+        if (escape.cp < 0x100) {
+          out = format_to(out, "\\x{:02x}", escape.cp);
+          continue;
+        }
+        if (escape.cp < 0x10000) {
+          out = format_to(out, "\\u{:04x}", escape.cp);
+          continue;
+        }
+        if (escape.cp < 0x110000) {
+          out = format_to(out, "\\U{:08x}", escape.cp);
+          continue;
+        }
+      }
+      for (Char escape_char : basic_string_view<Char>(
+               escape.begin, to_unsigned(escape.end - escape.begin))) {
+        out = format_to(
+            out, "\\x{:02x}",
+            static_cast<typename std::make_unsigned<Char>::type>(escape_char));
+      }
+      continue;
+    }
+    *out++ = c;
+  } while (begin != end);
+  *out++ = '"';
+  return out;
+}
+
+template <typename Char, typename OutputIt, typename T,
+          FMT_ENABLE_IF(std::is_convertible<T, std_string_view<char>>::value)>
+inline auto write_range_entry(OutputIt out, const T& str) -> OutputIt {
+  auto sv = std_string_view<Char>(str);
+  return write_range_entry<Char>(out, basic_string_view<Char>(sv));
+}
+
+template <typename Char, typename OutputIt, typename Arg,
+          FMT_ENABLE_IF(std::is_same<Arg, Char>::value)>
+OutputIt write_range_entry(OutputIt out, const Arg v) {
+  *out++ = '\'';
+  *out++ = v;
+  *out++ = '\'';
+  return out;
+}
+
+template <
+    typename Char, typename OutputIt, typename Arg,
+    FMT_ENABLE_IF(!is_std_string_like<typename std::decay<Arg>::type>::value &&
+                  !std::is_same<Arg, Char>::value)>
+OutputIt write_range_entry(OutputIt out, const Arg& v) {
+  return write<Char>(out, v);
+}
+
+}  // namespace detail
+
+template <typename T> struct is_tuple_like {
+  static FMT_CONSTEXPR_DECL const bool value =
+      detail::is_tuple_like_<T>::value && !detail::is_range_<T>::value;
+};
+
+template <typename TupleT, typename Char>
+struct formatter<TupleT, Char, enable_if_t<fmt::is_tuple_like<TupleT>::value>> {
+ private:
+  // C++11 generic lambda for format().
+  template <typename FormatContext> struct format_each {
+    template <typename T> void operator()(const T& v) {
+      if (i > 0) out = detail::write_delimiter(out);
+      out = detail::write_range_entry<Char>(out, v);
+      ++i;
+    }
+    int i;
+    typename FormatContext::iterator& out;
+  };
+
+ public:
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  template <typename FormatContext = format_context>
+  auto format(const TupleT& values, FormatContext& ctx) -> decltype(ctx.out()) {
+    auto out = ctx.out();
+    *out++ = '(';
+    detail::for_each(values, format_each<FormatContext>{0, out});
+    *out++ = ')';
+    return out;
+  }
+};
+
+template <typename T, typename Char> struct is_range {
+  static FMT_CONSTEXPR_DECL const bool value =
+      detail::is_range_<T>::value && !detail::is_std_string_like<T>::value &&
+      !detail::is_map<T>::value &&
+      !std::is_convertible<T, std::basic_string<Char>>::value &&
+      !std::is_constructible<detail::std_string_view<Char>, T>::value;
+};
+
+template <typename T, typename Char>
+struct formatter<
+    T, Char,
+    enable_if_t<
+        fmt::is_range<T, Char>::value
+// Workaround a bug in MSVC 2019 and earlier.
+#if !FMT_MSC_VER
+        && (is_formattable<detail::value_type<T>, Char>::value ||
+            detail::has_fallback_formatter<detail::value_type<T>, Char>::value)
+#endif
+        >> {
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  template <
+      typename FormatContext, typename U,
+      FMT_ENABLE_IF(
+          std::is_same<U, conditional_t<detail::has_const_begin_end<T>::value,
+                                        const T, T>>::value)>
+  auto format(U& range, FormatContext& ctx) -> decltype(ctx.out()) {
+#ifdef FMT_DEPRECATED_BRACED_RANGES
+    Char prefix = '{';
+    Char postfix = '}';
+#else
+    Char prefix = detail::is_set<T>::value ? '{' : '[';
+    Char postfix = detail::is_set<T>::value ? '}' : ']';
+#endif
+    auto out = ctx.out();
+    *out++ = prefix;
+    int i = 0;
+    auto it = std::begin(range);
+    auto end = std::end(range);
+    for (; it != end; ++it) {
+      if (i > 0) out = detail::write_delimiter(out);
+      out = detail::write_range_entry<Char>(out, *it);
+      ++i;
+    }
+    *out++ = postfix;
+    return out;
+  }
+};
+
+template <typename T, typename Char>
+struct formatter<
+    T, Char,
+    enable_if_t<
+        detail::is_map<T>::value
+// Workaround a bug in MSVC 2019 and earlier.
+#if !FMT_MSC_VER
+        && (is_formattable<detail::value_type<T>, Char>::value ||
+            detail::has_fallback_formatter<detail::value_type<T>, Char>::value)
+#endif
+        >> {
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  template <
+      typename FormatContext, typename U,
+      FMT_ENABLE_IF(
+          std::is_same<U, conditional_t<detail::has_const_begin_end<T>::value,
+                                        const T, T>>::value)>
+  auto format(U& map, FormatContext& ctx) -> decltype(ctx.out()) {
+    auto out = ctx.out();
+    *out++ = '{';
+    int i = 0;
+    for (const auto& item : map) {
+      if (i > 0) out = detail::write_delimiter(out);
+      out = detail::write_range_entry<Char>(out, item.first);
+      *out++ = ':';
+      *out++ = ' ';
+      out = detail::write_range_entry<Char>(out, item.second);
+      ++i;
+    }
+    *out++ = '}';
+    return out;
+  }
+};
+
+template <typename Char, typename... T> struct tuple_join_view : detail::view {
+  const std::tuple<T...>& tuple;
+  basic_string_view<Char> sep;
+
+  tuple_join_view(const std::tuple<T...>& t, basic_string_view<Char> s)
+      : tuple(t), sep{s} {}
+};
+
+template <typename Char, typename... T>
+using tuple_arg_join = tuple_join_view<Char, T...>;
+
+// Define FMT_TUPLE_JOIN_SPECIFIERS to enable experimental format specifiers
+// support in tuple_join. It is disabled by default because of issues with
+// the dynamic width and precision.
+#ifndef FMT_TUPLE_JOIN_SPECIFIERS
+#  define FMT_TUPLE_JOIN_SPECIFIERS 0
+#endif
+
+template <typename Char, typename... T>
+struct formatter<tuple_join_view<Char, T...>, Char> {
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return do_parse(ctx, std::integral_constant<size_t, sizeof...(T)>());
+  }
+
+  template <typename FormatContext>
+  auto format(const tuple_join_view<Char, T...>& value,
+              FormatContext& ctx) const -> typename FormatContext::iterator {
+    return do_format(value, ctx,
+                     std::integral_constant<size_t, sizeof...(T)>());
+  }
+
+ private:
+  std::tuple<formatter<typename std::decay<T>::type, Char>...> formatters_;
+
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto do_parse(ParseContext& ctx,
+                              std::integral_constant<size_t, 0>)
+      -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  template <typename ParseContext, size_t N>
+  FMT_CONSTEXPR auto do_parse(ParseContext& ctx,
+                              std::integral_constant<size_t, N>)
+      -> decltype(ctx.begin()) {
+    auto end = ctx.begin();
+#if FMT_TUPLE_JOIN_SPECIFIERS
+    end = std::get<sizeof...(T) - N>(formatters_).parse(ctx);
+    if (N > 1) {
+      auto end1 = do_parse(ctx, std::integral_constant<size_t, N - 1>());
+      if (end != end1)
+        FMT_THROW(format_error("incompatible format specs for tuple elements"));
+    }
+#endif
+    return end;
+  }
+
+  template <typename FormatContext>
+  auto do_format(const tuple_join_view<Char, T...>&, FormatContext& ctx,
+                 std::integral_constant<size_t, 0>) const ->
+      typename FormatContext::iterator {
+    return ctx.out();
+  }
+
+  template <typename FormatContext, size_t N>
+  auto do_format(const tuple_join_view<Char, T...>& value, FormatContext& ctx,
+                 std::integral_constant<size_t, N>) const ->
+      typename FormatContext::iterator {
+    auto out = std::get<sizeof...(T) - N>(formatters_)
+                   .format(std::get<sizeof...(T) - N>(value.tuple), ctx);
+    if (N > 1) {
+      out = std::copy(value.sep.begin(), value.sep.end(), out);
+      ctx.advance_to(out);
+      return do_format(value, ctx, std::integral_constant<size_t, N - 1>());
+    }
+    return out;
+  }
+};
+
+FMT_MODULE_EXPORT_BEGIN
+
+/**
+  \rst
+  Returns an object that formats `tuple` with elements separated by `sep`.
+
+  **Example**::
+
+    std::tuple<int, char> t = {1, 'a'};
+    fmt::print("{}", fmt::join(t, ", "));
+    // Output: "1, a"
+  \endrst
+ */
+template <typename... T>
+FMT_CONSTEXPR auto join(const std::tuple<T...>& tuple, string_view sep)
+    -> tuple_join_view<char, T...> {
+  return {tuple, sep};
+}
+
+template <typename... T>
+FMT_CONSTEXPR auto join(const std::tuple<T...>& tuple,
+                        basic_string_view<wchar_t> sep)
+    -> tuple_join_view<wchar_t, T...> {
+  return {tuple, sep};
+}
+
+/**
+  \rst
+  Returns an object that formats `initializer_list` with elements separated by
+  `sep`.
+
+  **Example**::
+
+    fmt::print("{}", fmt::join({1, 2, 3}, ", "));
+    // Output: "1, 2, 3"
+  \endrst
+ */
+template <typename T>
+auto join(std::initializer_list<T> list, string_view sep)
+    -> join_view<const T*, const T*> {
+  return join(std::begin(list), std::end(list), sep);
+}
+
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_RANGES_H_
diff --git a/3rdparty/fmt/include/fmt/xchar.h b/3rdparty/fmt/include/fmt/xchar.h
new file mode 100644
index 00000000..55825077
--- /dev/null
+++ b/3rdparty/fmt/include/fmt/xchar.h
@@ -0,0 +1,236 @@
+// Formatting library for C++ - optional wchar_t and exotic character support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_XCHAR_H_
+#define FMT_XCHAR_H_
+
+#include <cwchar>
+#include <tuple>
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+template <typename T>
+using is_exotic_char = bool_constant<!std::is_same<T, char>::value>;
+}
+
+FMT_MODULE_EXPORT_BEGIN
+
+using wstring_view = basic_string_view<wchar_t>;
+using wformat_parse_context = basic_format_parse_context<wchar_t>;
+using wformat_context = buffer_context<wchar_t>;
+using wformat_args = basic_format_args<wformat_context>;
+using wmemory_buffer = basic_memory_buffer<wchar_t>;
+
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+// Workaround broken conversion on older gcc.
+template <typename... Args> using wformat_string = wstring_view;
+#else
+template <typename... Args>
+using wformat_string = basic_format_string<wchar_t, type_identity_t<Args>...>;
+#endif
+
+template <> struct is_char<wchar_t> : std::true_type {};
+template <> struct is_char<detail::char8_type> : std::true_type {};
+template <> struct is_char<char16_t> : std::true_type {};
+template <> struct is_char<char32_t> : std::true_type {};
+
+template <typename... Args>
+constexpr format_arg_store<wformat_context, Args...> make_wformat_args(
+    const Args&... args) {
+  return {args...};
+}
+
+inline namespace literals {
+constexpr auto operator"" _format(const wchar_t* s, size_t n)
+    -> detail::udl_formatter<wchar_t> {
+  return {{s, n}};
+}
+
+#if FMT_USE_USER_DEFINED_LITERALS && !FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+constexpr detail::udl_arg<wchar_t> operator"" _a(const wchar_t* s, size_t) {
+  return {s};
+}
+#endif
+}  // namespace literals
+
+template <typename It, typename Sentinel>
+auto join(It begin, Sentinel end, wstring_view sep)
+    -> join_view<It, Sentinel, wchar_t> {
+  return {begin, end, sep};
+}
+
+template <typename Range>
+auto join(Range&& range, wstring_view sep)
+    -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>,
+                 wchar_t> {
+  return join(std::begin(range), std::end(range), sep);
+}
+
+template <typename T>
+auto join(std::initializer_list<T> list, wstring_view sep)
+    -> join_view<const T*, const T*, wchar_t> {
+  return join(std::begin(list), std::end(list), sep);
+}
+
+template <typename Char, FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+auto vformat(basic_string_view<Char> format_str,
+             basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> std::basic_string<Char> {
+  basic_memory_buffer<Char> buffer;
+  detail::vformat_to(buffer, format_str, args);
+  return to_string(buffer);
+}
+
+// Pass char_t as a default template parameter instead of using
+// std::basic_string<char_t<S>> to reduce the symbol size.
+template <typename S, typename... Args, typename Char = char_t<S>,
+          FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+auto format(const S& format_str, Args&&... args) -> std::basic_string<Char> {
+  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+  return vformat(to_string_view(format_str), vargs);
+}
+
+template <typename Locale, typename S, typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_locale<Locale>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto vformat(
+    const Locale& loc, const S& format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> std::basic_string<Char> {
+  return detail::vformat(loc, to_string_view(format_str), args);
+}
+
+template <typename Locale, typename S, typename... Args,
+          typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_locale<Locale>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto format(const Locale& loc, const S& format_str, Args&&... args)
+    -> std::basic_string<Char> {
+  return detail::vformat(loc, to_string_view(format_str),
+                         fmt::make_args_checked<Args...>(format_str, args...));
+}
+
+template <typename OutputIt, typename S, typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_exotic_char<Char>::value)>
+auto vformat_to(OutputIt out, const S& format_str,
+                basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> OutputIt {
+  auto&& buf = detail::get_buffer<Char>(out);
+  detail::vformat_to(buf, to_string_view(format_str), args);
+  return detail::get_iterator(buf);
+}
+
+template <typename OutputIt, typename S, typename... Args,
+          typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto format_to(OutputIt out, const S& fmt, Args&&... args) -> OutputIt {
+  const auto& vargs = fmt::make_args_checked<Args...>(fmt, args...);
+  return vformat_to(out, to_string_view(fmt), vargs);
+}
+
+template <typename S, typename... Args, typename Char, size_t SIZE,
+          typename Allocator, FMT_ENABLE_IF(detail::is_string<S>::value)>
+FMT_DEPRECATED auto format_to(basic_memory_buffer<Char, SIZE, Allocator>& buf,
+                              const S& format_str, Args&&... args) ->
+    typename buffer_context<Char>::iterator {
+  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+  detail::vformat_to(buf, to_string_view(format_str), vargs, {});
+  return detail::buffer_appender<Char>(buf);
+}
+
+template <typename Locale, typename S, typename OutputIt, typename... Args,
+          typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_locale<Locale>::value&&
+                                detail::is_exotic_char<Char>::value)>
+inline auto vformat_to(
+    OutputIt out, const Locale& loc, const S& format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args) -> OutputIt {
+  auto&& buf = detail::get_buffer<Char>(out);
+  vformat_to(buf, to_string_view(format_str), args, detail::locale_ref(loc));
+  return detail::get_iterator(buf);
+}
+
+template <
+    typename OutputIt, typename Locale, typename S, typename... Args,
+    typename Char = char_t<S>,
+    bool enable = detail::is_output_iterator<OutputIt, Char>::value&&
+        detail::is_locale<Locale>::value&& detail::is_exotic_char<Char>::value>
+inline auto format_to(OutputIt out, const Locale& loc, const S& format_str,
+                      Args&&... args) ->
+    typename std::enable_if<enable, OutputIt>::type {
+  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+  return vformat_to(out, loc, to_string_view(format_str), vargs);
+}
+
+template <typename OutputIt, typename Char, typename... Args,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto vformat_to_n(
+    OutputIt out, size_t n, basic_string_view<Char> format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> format_to_n_result<OutputIt> {
+  detail::iterator_buffer<OutputIt, Char, detail::fixed_buffer_traits> buf(out,
+                                                                           n);
+  detail::vformat_to(buf, format_str, args);
+  return {buf.out(), buf.count()};
+}
+
+template <typename OutputIt, typename S, typename... Args,
+          typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto format_to_n(OutputIt out, size_t n, const S& fmt,
+                        const Args&... args) -> format_to_n_result<OutputIt> {
+  const auto& vargs = fmt::make_args_checked<Args...>(fmt, args...);
+  return vformat_to_n(out, n, to_string_view(fmt), vargs);
+}
+
+template <typename S, typename... Args, typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_exotic_char<Char>::value)>
+inline auto formatted_size(const S& fmt, Args&&... args) -> size_t {
+  detail::counting_buffer<Char> buf;
+  const auto& vargs = fmt::make_args_checked<Args...>(fmt, args...);
+  detail::vformat_to(buf, to_string_view(fmt), vargs);
+  return buf.count();
+}
+
+inline void vprint(std::FILE* f, wstring_view fmt, wformat_args args) {
+  wmemory_buffer buffer;
+  detail::vformat_to(buffer, fmt, args);
+  buffer.push_back(L'\0');
+  if (std::fputws(buffer.data(), f) == -1)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
+}
+
+inline void vprint(wstring_view fmt, wformat_args args) {
+  vprint(stdout, fmt, args);
+}
+
+template <typename... T>
+void print(std::FILE* f, wformat_string<T...> fmt, T&&... args) {
+  return vprint(f, wstring_view(fmt), fmt::make_wformat_args(args...));
+}
+
+template <typename... T> void print(wformat_string<T...> fmt, T&&... args) {
+  return vprint(wstring_view(fmt), fmt::make_wformat_args(args...));
+}
+
+/**
+  Converts *value* to ``std::wstring`` using the default format for type *T*.
+ */
+template <typename T> inline auto to_wstring(const T& value) -> std::wstring {
+  return format(FMT_STRING(L"{}"), value);
+}
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_XCHAR_H_
diff --git a/3rdparty/fmt/src/fmt.cc b/3rdparty/fmt/src/fmt.cc
new file mode 100644
index 00000000..80e77e26
--- /dev/null
+++ b/3rdparty/fmt/src/fmt.cc
@@ -0,0 +1,99 @@
+module;
+#ifndef __cpp_modules
+#  error Module not supported.
+#endif
+
+// put all implementation-provided headers into the global module fragment
+// to prevent attachment to this module
+#if !defined(_CRT_SECURE_NO_WARNINGS) && defined(_MSC_VER)
+#  define _CRT_SECURE_NO_WARNINGS
+#endif
+#if !defined(WIN32_LEAN_AND_MEAN) && defined(_WIN32)
+#  define WIN32_LEAN_AND_MEAN
+#endif
+
+#include <algorithm>
+#include <cctype>
+#include <cerrno>
+#include <chrono>
+#include <climits>
+#include <clocale>
+#include <cmath>
+#include <cstdarg>
+#include <cstddef>
+#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <cwchar>
+#include <exception>
+#include <functional>
+#include <iterator>
+#include <limits>
+#include <locale>
+#include <memory>
+#include <ostream>
+#include <sstream>
+#include <stdexcept>
+#include <string>
+#include <string_view>
+#include <system_error>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+#if _MSC_VER
+#  include <intrin.h>
+#endif
+#if defined __APPLE__ || defined(__FreeBSD__)
+#  include <xlocale.h>
+#endif
+#if __has_include(<winapifamily.h>)
+#  include <winapifamily.h>
+#endif
+#if (__has_include(<fcntl.h>) || defined(__APPLE__) || \
+     defined(__linux__)) &&                            \
+    (!defined(WINAPI_FAMILY) || (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
+#  include <fcntl.h>
+#  include <sys/stat.h>
+#  include <sys/types.h>
+#  ifndef _WIN32
+#    include <unistd.h>
+#  else
+#    include <io.h>
+#  endif
+#endif
+#ifdef _WIN32
+#  include <windows.h>
+#endif
+
+export module fmt;
+
+#define FMT_MODULE_EXPORT export
+#define FMT_MODULE_EXPORT_BEGIN export {
+#define FMT_MODULE_EXPORT_END }
+#define FMT_BEGIN_DETAIL_NAMESPACE \
+  }                                \
+  namespace detail {
+#define FMT_END_DETAIL_NAMESPACE \
+  }                              \
+  export {
+// all library-provided declarations and definitions
+// must be in the module purview to be exported
+#include "fmt/args.h"
+#include "fmt/chrono.h"
+#include "fmt/color.h"
+#include "fmt/compile.h"
+#include "fmt/format.h"
+#include "fmt/os.h"
+#include "fmt/printf.h"
+#include "fmt/xchar.h"
+
+// gcc doesn't yet implement private module fragments
+#if !FMT_GCC_VERSION
+module : private;
+#endif
+
+#include "format.cc"
+#include "os.cc"
diff --git a/3rdparty/fmt/src/format.cc b/3rdparty/fmt/src/format.cc
new file mode 100644
index 00000000..ecb8cc79
--- /dev/null
+++ b/3rdparty/fmt/src/format.cc
@@ -0,0 +1,124 @@
+// Formatting library for C++
+//
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/format-inl.h"
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+// DEPRECATED!
+template <typename T = void> struct basic_data {
+  FMT_API static constexpr const char digits[100][2] = {
+      {'0', '0'}, {'0', '1'}, {'0', '2'}, {'0', '3'}, {'0', '4'}, {'0', '5'},
+      {'0', '6'}, {'0', '7'}, {'0', '8'}, {'0', '9'}, {'1', '0'}, {'1', '1'},
+      {'1', '2'}, {'1', '3'}, {'1', '4'}, {'1', '5'}, {'1', '6'}, {'1', '7'},
+      {'1', '8'}, {'1', '9'}, {'2', '0'}, {'2', '1'}, {'2', '2'}, {'2', '3'},
+      {'2', '4'}, {'2', '5'}, {'2', '6'}, {'2', '7'}, {'2', '8'}, {'2', '9'},
+      {'3', '0'}, {'3', '1'}, {'3', '2'}, {'3', '3'}, {'3', '4'}, {'3', '5'},
+      {'3', '6'}, {'3', '7'}, {'3', '8'}, {'3', '9'}, {'4', '0'}, {'4', '1'},
+      {'4', '2'}, {'4', '3'}, {'4', '4'}, {'4', '5'}, {'4', '6'}, {'4', '7'},
+      {'4', '8'}, {'4', '9'}, {'5', '0'}, {'5', '1'}, {'5', '2'}, {'5', '3'},
+      {'5', '4'}, {'5', '5'}, {'5', '6'}, {'5', '7'}, {'5', '8'}, {'5', '9'},
+      {'6', '0'}, {'6', '1'}, {'6', '2'}, {'6', '3'}, {'6', '4'}, {'6', '5'},
+      {'6', '6'}, {'6', '7'}, {'6', '8'}, {'6', '9'}, {'7', '0'}, {'7', '1'},
+      {'7', '2'}, {'7', '3'}, {'7', '4'}, {'7', '5'}, {'7', '6'}, {'7', '7'},
+      {'7', '8'}, {'7', '9'}, {'8', '0'}, {'8', '1'}, {'8', '2'}, {'8', '3'},
+      {'8', '4'}, {'8', '5'}, {'8', '6'}, {'8', '7'}, {'8', '8'}, {'8', '9'},
+      {'9', '0'}, {'9', '1'}, {'9', '2'}, {'9', '3'}, {'9', '4'}, {'9', '5'},
+      {'9', '6'}, {'9', '7'}, {'9', '8'}, {'9', '9'}};
+  FMT_API static constexpr const char hex_digits[] = "0123456789abcdef";
+  FMT_API static constexpr const char signs[4] = {0, '-', '+', ' '};
+  FMT_API static constexpr const char left_padding_shifts[5] = {31, 31, 0, 1,
+                                                                0};
+  FMT_API static constexpr const char right_padding_shifts[5] = {0, 31, 0, 1,
+                                                                 0};
+  FMT_API static constexpr const unsigned prefixes[4] = {0, 0, 0x1000000u | '+',
+                                                         0x1000000u | ' '};
+};
+
+#ifdef FMT_SHARED
+// Required for -flto, -fivisibility=hidden and -shared to work
+extern template struct basic_data<void>;
+#endif
+
+#if __cplusplus < 201703L
+// DEPRECATED! These are here only for ABI compatiblity.
+template <typename T> constexpr const char basic_data<T>::digits[][2];
+template <typename T> constexpr const char basic_data<T>::hex_digits[];
+template <typename T> constexpr const char basic_data<T>::signs[];
+template <typename T> constexpr const char basic_data<T>::left_padding_shifts[];
+template <typename T>
+constexpr const char basic_data<T>::right_padding_shifts[];
+template <typename T> constexpr const unsigned basic_data<T>::prefixes[];
+#endif
+
+template <typename T>
+int format_float(char* buf, std::size_t size, const char* format, int precision,
+                 T value) {
+#ifdef FMT_FUZZ
+  if (precision > 100000)
+    throw std::runtime_error(
+        "fuzz mode - avoid large allocation inside snprintf");
+#endif
+  // Suppress the warning about nonliteral format string.
+  int (*snprintf_ptr)(char*, size_t, const char*, ...) = FMT_SNPRINTF;
+  return precision < 0 ? snprintf_ptr(buf, size, format, value)
+                       : snprintf_ptr(buf, size, format, precision, value);
+}
+
+template FMT_API dragonbox::decimal_fp<float> dragonbox::to_decimal(float x)
+    FMT_NOEXCEPT;
+template FMT_API dragonbox::decimal_fp<double> dragonbox::to_decimal(double x)
+    FMT_NOEXCEPT;
+}  // namespace detail
+
+// Workaround a bug in MSVC2013 that prevents instantiation of format_float.
+int (*instantiate_format_float)(double, int, detail::float_specs,
+                                detail::buffer<char>&) = detail::format_float;
+
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+template FMT_API detail::locale_ref::locale_ref(const std::locale& loc);
+template FMT_API std::locale detail::locale_ref::get<std::locale>() const;
+#endif
+
+// Explicit instantiations for char.
+
+template FMT_API auto detail::thousands_sep_impl(locale_ref)
+    -> thousands_sep_result<char>;
+template FMT_API char detail::decimal_point_impl(locale_ref);
+
+template FMT_API void detail::buffer<char>::append(const char*, const char*);
+
+// DEPRECATED!
+// There is no correspondent extern template in format.h because of
+// incompatibility between clang and gcc (#2377).
+template FMT_API void detail::vformat_to(
+    detail::buffer<char>&, string_view,
+    basic_format_args<FMT_BUFFER_CONTEXT(char)>, detail::locale_ref);
+
+template FMT_API int detail::snprintf_float(double, int, detail::float_specs,
+                                            detail::buffer<char>&);
+template FMT_API int detail::snprintf_float(long double, int,
+                                            detail::float_specs,
+                                            detail::buffer<char>&);
+template FMT_API int detail::format_float(double, int, detail::float_specs,
+                                          detail::buffer<char>&);
+template FMT_API int detail::format_float(long double, int, detail::float_specs,
+                                          detail::buffer<char>&);
+
+// Explicit instantiations for wchar_t.
+
+template FMT_API auto detail::thousands_sep_impl(locale_ref)
+    -> thousands_sep_result<wchar_t>;
+template FMT_API wchar_t detail::decimal_point_impl(locale_ref);
+
+template FMT_API void detail::buffer<wchar_t>::append(const wchar_t*,
+                                                      const wchar_t*);
+
+template struct detail::basic_data<void>;
+
+FMT_END_NAMESPACE
diff --git a/3rdparty/fmt/src/os.cc b/3rdparty/fmt/src/os.cc
new file mode 100644
index 00000000..04b4dc50
--- /dev/null
+++ b/3rdparty/fmt/src/os.cc
@@ -0,0 +1,361 @@
+// Formatting library for C++ - optional OS-specific functionality
+//
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+// Disable bogus MSVC warnings.
+#if !defined(_CRT_SECURE_NO_WARNINGS) && defined(_MSC_VER)
+#  define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#include "fmt/os.h"
+
+#include <climits>
+
+#if FMT_USE_FCNTL
+#  include <sys/stat.h>
+#  include <sys/types.h>
+
+#  ifndef _WIN32
+#    include <unistd.h>
+#  else
+#    ifndef WIN32_LEAN_AND_MEAN
+#      define WIN32_LEAN_AND_MEAN
+#    endif
+#    include <io.h>
+
+#    ifndef S_IRUSR
+#      define S_IRUSR _S_IREAD
+#    endif
+#    ifndef S_IWUSR
+#      define S_IWUSR _S_IWRITE
+#    endif
+#    ifndef S_IRGRP
+#      define S_IRGRP 0
+#    endif
+#    ifndef S_IROTH
+#      define S_IROTH 0
+#    endif
+#  endif  // _WIN32
+#endif    // FMT_USE_FCNTL
+
+#ifdef _WIN32
+#  include <windows.h>
+#endif
+
+#ifdef fileno
+#  undef fileno
+#endif
+
+namespace {
+#ifdef _WIN32
+// Return type of read and write functions.
+using rwresult = int;
+
+// On Windows the count argument to read and write is unsigned, so convert
+// it from size_t preventing integer overflow.
+inline unsigned convert_rwcount(std::size_t count) {
+  return count <= UINT_MAX ? static_cast<unsigned>(count) : UINT_MAX;
+}
+#elif FMT_USE_FCNTL
+// Return type of read and write functions.
+using rwresult = ssize_t;
+
+inline std::size_t convert_rwcount(std::size_t count) { return count; }
+#endif
+}  // namespace
+
+FMT_BEGIN_NAMESPACE
+
+#ifdef _WIN32
+detail::utf16_to_utf8::utf16_to_utf8(basic_string_view<wchar_t> s) {
+  if (int error_code = convert(s)) {
+    FMT_THROW(windows_error(error_code,
+                            "cannot convert string from UTF-16 to UTF-8"));
+  }
+}
+
+int detail::utf16_to_utf8::convert(basic_string_view<wchar_t> s) {
+  if (s.size() > INT_MAX) return ERROR_INVALID_PARAMETER;
+  int s_size = static_cast<int>(s.size());
+  if (s_size == 0) {
+    // WideCharToMultiByte does not support zero length, handle separately.
+    buffer_.resize(1);
+    buffer_[0] = 0;
+    return 0;
+  }
+
+  int length = WideCharToMultiByte(CP_UTF8, 0, s.data(), s_size, nullptr, 0,
+                                   nullptr, nullptr);
+  if (length == 0) return GetLastError();
+  buffer_.resize(length + 1);
+  length = WideCharToMultiByte(CP_UTF8, 0, s.data(), s_size, &buffer_[0],
+                               length, nullptr, nullptr);
+  if (length == 0) return GetLastError();
+  buffer_[length] = 0;
+  return 0;
+}
+
+namespace detail {
+
+class system_message {
+  system_message(const system_message&) = delete;
+  void operator=(const system_message&) = delete;
+
+  unsigned long result_;
+  wchar_t* message_;
+
+  static bool is_whitespace(wchar_t c) FMT_NOEXCEPT {
+    return c == L' ' || c == L'\n' || c == L'\r' || c == L'\t' || c == L'\0';
+  }
+
+ public:
+  explicit system_message(unsigned long error_code)
+      : result_(0), message_(nullptr) {
+    result_ = FormatMessageW(
+        FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
+            FORMAT_MESSAGE_IGNORE_INSERTS,
+        nullptr, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+        reinterpret_cast<wchar_t*>(&message_), 0, nullptr);
+    if (result_ != 0) {
+      while (result_ != 0 && is_whitespace(message_[result_ - 1])) {
+        --result_;
+      }
+    }
+  }
+  ~system_message() { LocalFree(message_); }
+  explicit operator bool() const FMT_NOEXCEPT { return result_ != 0; }
+  operator basic_string_view<wchar_t>() const FMT_NOEXCEPT {
+    return basic_string_view<wchar_t>(message_, result_);
+  }
+};
+
+class utf8_system_category final : public std::error_category {
+ public:
+  const char* name() const FMT_NOEXCEPT override { return "system"; }
+  std::string message(int error_code) const override {
+    system_message msg(error_code);
+    if (msg) {
+      utf16_to_utf8 utf8_message;
+      if (utf8_message.convert(msg) == ERROR_SUCCESS) {
+        return utf8_message.str();
+      }
+    }
+    return "unknown error";
+  }
+};
+
+}  // namespace detail
+
+FMT_API const std::error_category& system_category() FMT_NOEXCEPT {
+  static const detail::utf8_system_category category;
+  return category;
+}
+
+std::system_error vwindows_error(int err_code, string_view format_str,
+                                 format_args args) {
+  auto ec = std::error_code(err_code, system_category());
+  return std::system_error(ec, vformat(format_str, args));
+}
+
+void detail::format_windows_error(detail::buffer<char>& out, int error_code,
+                                  const char* message) FMT_NOEXCEPT {
+  FMT_TRY {
+    system_message msg(error_code);
+    if (msg) {
+      utf16_to_utf8 utf8_message;
+      if (utf8_message.convert(msg) == ERROR_SUCCESS) {
+        format_to(buffer_appender<char>(out), "{}: {}", message, utf8_message);
+        return;
+      }
+    }
+  }
+  FMT_CATCH(...) {}
+  format_error_code(out, error_code, message);
+}
+
+void report_windows_error(int error_code, const char* message) FMT_NOEXCEPT {
+  report_error(detail::format_windows_error, error_code, message);
+}
+#endif  // _WIN32
+
+buffered_file::~buffered_file() FMT_NOEXCEPT {
+  if (file_ && FMT_SYSTEM(fclose(file_)) != 0)
+    report_system_error(errno, "cannot close file");
+}
+
+buffered_file::buffered_file(cstring_view filename, cstring_view mode) {
+  FMT_RETRY_VAL(file_, FMT_SYSTEM(fopen(filename.c_str(), mode.c_str())),
+                nullptr);
+  if (!file_)
+    FMT_THROW(system_error(errno, "cannot open file {}", filename.c_str()));
+}
+
+void buffered_file::close() {
+  if (!file_) return;
+  int result = FMT_SYSTEM(fclose(file_));
+  file_ = nullptr;
+  if (result != 0) FMT_THROW(system_error(errno, "cannot close file"));
+}
+
+// A macro used to prevent expansion of fileno on broken versions of MinGW.
+#define FMT_ARGS
+
+int buffered_file::fileno() const {
+  int fd = FMT_POSIX_CALL(fileno FMT_ARGS(file_));
+  if (fd == -1) FMT_THROW(system_error(errno, "cannot get file descriptor"));
+  return fd;
+}
+
+#if FMT_USE_FCNTL
+file::file(cstring_view path, int oflag) {
+#  ifdef _WIN32
+  using mode_t = int;
+#  endif
+  mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
+#  if defined(_WIN32) && !defined(__MINGW32__)
+  fd_ = -1;
+  FMT_POSIX_CALL(sopen_s(&fd_, path.c_str(), oflag, _SH_DENYNO, mode));
+#  else
+  FMT_RETRY(fd_, FMT_POSIX_CALL(open(path.c_str(), oflag, mode)));
+#  endif
+  if (fd_ == -1)
+    FMT_THROW(system_error(errno, "cannot open file {}", path.c_str()));
+}
+
+file::~file() FMT_NOEXCEPT {
+  // Don't retry close in case of EINTR!
+  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
+  if (fd_ != -1 && FMT_POSIX_CALL(close(fd_)) != 0)
+    report_system_error(errno, "cannot close file");
+}
+
+void file::close() {
+  if (fd_ == -1) return;
+  // Don't retry close in case of EINTR!
+  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
+  int result = FMT_POSIX_CALL(close(fd_));
+  fd_ = -1;
+  if (result != 0) FMT_THROW(system_error(errno, "cannot close file"));
+}
+
+long long file::size() const {
+#  ifdef _WIN32
+  // Use GetFileSize instead of GetFileSizeEx for the case when _WIN32_WINNT
+  // is less than 0x0500 as is the case with some default MinGW builds.
+  // Both functions support large file sizes.
+  DWORD size_upper = 0;
+  HANDLE handle = reinterpret_cast<HANDLE>(_get_osfhandle(fd_));
+  DWORD size_lower = FMT_SYSTEM(GetFileSize(handle, &size_upper));
+  if (size_lower == INVALID_FILE_SIZE) {
+    DWORD error = GetLastError();
+    if (error != NO_ERROR)
+      FMT_THROW(windows_error(GetLastError(), "cannot get file size"));
+  }
+  unsigned long long long_size = size_upper;
+  return (long_size << sizeof(DWORD) * CHAR_BIT) | size_lower;
+#  else
+  using Stat = struct stat;
+  Stat file_stat = Stat();
+  if (FMT_POSIX_CALL(fstat(fd_, &file_stat)) == -1)
+    FMT_THROW(system_error(errno, "cannot get file attributes"));
+  static_assert(sizeof(long long) >= sizeof(file_stat.st_size),
+                "return type of file::size is not large enough");
+  return file_stat.st_size;
+#  endif
+}
+
+std::size_t file::read(void* buffer, std::size_t count) {
+  rwresult result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(read(fd_, buffer, convert_rwcount(count))));
+  if (result < 0) FMT_THROW(system_error(errno, "cannot read from file"));
+  return detail::to_unsigned(result);
+}
+
+std::size_t file::write(const void* buffer, std::size_t count) {
+  rwresult result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(write(fd_, buffer, convert_rwcount(count))));
+  if (result < 0) FMT_THROW(system_error(errno, "cannot write to file"));
+  return detail::to_unsigned(result);
+}
+
+file file::dup(int fd) {
+  // Don't retry as dup doesn't return EINTR.
+  // http://pubs.opengroup.org/onlinepubs/009695399/functions/dup.html
+  int new_fd = FMT_POSIX_CALL(dup(fd));
+  if (new_fd == -1)
+    FMT_THROW(system_error(errno, "cannot duplicate file descriptor {}", fd));
+  return file(new_fd);
+}
+
+void file::dup2(int fd) {
+  int result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
+  if (result == -1) {
+    FMT_THROW(system_error(errno, "cannot duplicate file descriptor {} to {}",
+                           fd_, fd));
+  }
+}
+
+void file::dup2(int fd, std::error_code& ec) FMT_NOEXCEPT {
+  int result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
+  if (result == -1) ec = std::error_code(errno, std::generic_category());
+}
+
+void file::pipe(file& read_end, file& write_end) {
+  // Close the descriptors first to make sure that assignments don't throw
+  // and there are no leaks.
+  read_end.close();
+  write_end.close();
+  int fds[2] = {};
+#  ifdef _WIN32
+  // Make the default pipe capacity same as on Linux 2.6.11+.
+  enum { DEFAULT_CAPACITY = 65536 };
+  int result = FMT_POSIX_CALL(pipe(fds, DEFAULT_CAPACITY, _O_BINARY));
+#  else
+  // Don't retry as the pipe function doesn't return EINTR.
+  // http://pubs.opengroup.org/onlinepubs/009696799/functions/pipe.html
+  int result = FMT_POSIX_CALL(pipe(fds));
+#  endif
+  if (result != 0) FMT_THROW(system_error(errno, "cannot create pipe"));
+  // The following assignments don't throw because read_fd and write_fd
+  // are closed.
+  read_end = file(fds[0]);
+  write_end = file(fds[1]);
+}
+
+buffered_file file::fdopen(const char* mode) {
+// Don't retry as fdopen doesn't return EINTR.
+#  if defined(__MINGW32__) && defined(_POSIX_)
+  FILE* f = ::fdopen(fd_, mode);
+#  else
+  FILE* f = FMT_POSIX_CALL(fdopen(fd_, mode));
+#  endif
+  if (!f)
+    FMT_THROW(
+        system_error(errno, "cannot associate stream with file descriptor"));
+  buffered_file bf(f);
+  fd_ = -1;
+  return bf;
+}
+
+long getpagesize() {
+#  ifdef _WIN32
+  SYSTEM_INFO si;
+  GetSystemInfo(&si);
+  return si.dwPageSize;
+#  else
+  long size = FMT_POSIX_CALL(sysconf(_SC_PAGESIZE));
+  if (size < 0) FMT_THROW(system_error(errno, "cannot get memory page size"));
+  return size;
+#  endif
+}
+
+FMT_API void ostream::grow(size_t) {
+  if (this->size() == this->capacity()) flush();
+}
+#endif  // FMT_USE_FCNTL
+FMT_END_NAMESPACE
diff --git a/3rdparty/fmt/support/Android.mk b/3rdparty/fmt/support/Android.mk
new file mode 100644
index 00000000..84a3e32f
--- /dev/null
+++ b/3rdparty/fmt/support/Android.mk
@@ -0,0 +1,15 @@
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := fmt_static
+LOCAL_MODULE_FILENAME := libfmt
+
+LOCAL_SRC_FILES := ../src/format.cc
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH)
+LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)
+
+LOCAL_CFLAGS += -std=c++11 -fexceptions
+
+include $(BUILD_STATIC_LIBRARY)
+
diff --git a/3rdparty/fmt/support/AndroidManifest.xml b/3rdparty/fmt/support/AndroidManifest.xml
new file mode 100644
index 00000000..b5281fee
--- /dev/null
+++ b/3rdparty/fmt/support/AndroidManifest.xml
@@ -0,0 +1 @@
+<manifest package="net.fmtlib" />
diff --git a/3rdparty/fmt/support/C++.sublime-syntax b/3rdparty/fmt/support/C++.sublime-syntax
new file mode 100644
index 00000000..9dfb5cbe
--- /dev/null
+++ b/3rdparty/fmt/support/C++.sublime-syntax
@@ -0,0 +1,2061 @@
+%YAML 1.2
+---
+# http://www.sublimetext.com/docs/3/syntax.html
+name: C++ (fmt)
+comment: I don't think anyone uses .hp. .cp tends to be paired with .h. (I could be wrong. :) -- chris
+file_extensions:
+  - cpp
+  - cc
+  - cp
+  - cxx
+  - c++
+  - C
+  - h
+  - hh
+  - hpp
+  - hxx
+  - h++
+  - inl
+  - ipp
+first_line_match: '-\*- C\+\+ -\*-'
+scope: source.c++
+variables:
+  identifier: \b[[:alpha:]_][[:alnum:]_]*\b # upper and lowercase
+  macro_identifier: \b[[:upper:]_][[:upper:][:digit:]_]{2,}\b # only uppercase, at least 3 chars
+  path_lookahead: '(?:::\s*)?(?:{{identifier}}\s*::\s*)*(?:template\s+)?{{identifier}}'
+  operator_method_name: '\boperator\s*(?:[-+*/%^&|~!=<>]|[-+*/%^&|=!<>]=|<<=?|>>=?|&&|\|\||\+\+|--|,|->\*?|\(\)|\[\]|""\s*{{identifier}})'
+  casts: 'const_cast|dynamic_cast|reinterpret_cast|static_cast'
+  operator_keywords: 'and|and_eq|bitand|bitor|compl|not|not_eq|or|or_eq|xor|xor_eq|noexcept'
+  control_keywords: 'break|case|catch|continue|default|do|else|for|goto|if|_Pragma|return|switch|throw|try|while'
+  memory_operators: 'new|delete'
+  basic_types: 'asm|__asm__|auto|bool|_Bool|char|_Complex|double|float|_Imaginary|int|long|short|signed|unsigned|void'
+  before_tag: 'struct|union|enum\s+class|enum\s+struct|enum|class'
+  declspec: '__declspec\(\s*\w+(?:\([^)]+\))?\s*\)'
+  storage_classes: 'static|export|extern|friend|explicit|virtual|register|thread_local'
+  type_qualifier: 'const|constexpr|mutable|typename|volatile'
+  compiler_directive: 'inline|restrict|__restrict__|__restrict'
+  visibility_modifiers: 'private|protected|public'
+  other_keywords: 'typedef|nullptr|{{visibility_modifiers}}|static_assert|sizeof|using|typeid|alignof|alignas|namespace|template'
+  modifiers: '{{storage_classes}}|{{type_qualifier}}|{{compiler_directive}}'
+  non_angle_brackets: '(?=<<|<=)'
+
+  regular: '[^(){}&;*^%=<>-]*'
+  paren_open: (?:\(
+  paren_close: '\))?'
+  generic_open: (?:<
+  generic_close: '>)?'
+  balance_parentheses: '{{regular}}{{paren_open}}{{regular}}{{paren_close}}{{regular}}'
+  generic_lookahead: <{{regular}}{{generic_open}}{{regular}}{{generic_open}}{{regular}}{{generic_close}}\s*{{generic_close}}{{balance_parentheses}}>
+
+  data_structures_forward_decl_lookahead: '(\s+{{macro_identifier}})*\s*(:\s*({{path_lookahead}}|{{visibility_modifiers}}|,|\s|<[^;]*>)+)?;'
+  non_func_keywords: 'if|for|switch|while|decltype|sizeof|__declspec|__attribute__|typeid|alignof|alignas|static_assert'
+
+  format_spec: |-
+    (?x:
+      (?:.? [<>=^])?     # fill align
+      [ +-]?             # sign
+      \#?                # alternate form
+      # technically, octal and hexadecimal integers are also supported as 'width', but rarely used
+      \d*                # width
+      ,?                 # thousands separator
+      (?:\.\d+)?         # precision
+      [bcdeEfFgGnosxX%]? # type
+    )
+
+contexts:
+  main:
+    - include: preprocessor-global
+    - include: global
+
+  #############################################################################
+  # Reusable contexts
+  #
+  # The follow contexts are currently constructed to be reused in the
+  # Objetive-C++ syntax. They are specifically constructed to not push into
+  # sub-contexts, which ensures that Objective-C++ code isn't accidentally
+  # lexed as plain C++.
+  #
+  # The "unique-*" contexts are additions that C++ makes over C, and thus can
+  # be directly reused in Objective-C++ along with contexts from Objective-C
+  # and C.
+  #############################################################################
+
+  unique-late-expressions:
+    # This is highlighted after all of the other control keywords
+    # to allow operator overloading to be lexed properly
+    - match: \boperator\b
+      scope: keyword.control.c++
+
+  unique-modifiers:
+    - match: \b({{modifiers}})\b
+      scope: storage.modifier.c++
+
+  unique-variables:
+    - match: \bthis\b
+      scope: variable.language.c++
+    # common C++ instance var naming idiom -- fMemberName
+    - match: '\b(f|m)[[:upper:]]\w*\b'
+      scope: variable.other.readwrite.member.c++
+    # common C++ instance var naming idiom -- m_member_name
+    - match: '\bm_[[:alnum:]_]+\b'
+      scope: variable.other.readwrite.member.c++
+
+  unique-constants:
+    - match: \bnullptr\b
+      scope: constant.language.c++
+
+  unique-keywords:
+    - match: \busing\b
+      scope: keyword.control.c++
+    - match: \bbreak\b
+      scope: keyword.control.flow.break.c++
+    - match: \bcontinue\b
+      scope: keyword.control.flow.continue.c++
+    - match: \bgoto\b
+      scope: keyword.control.flow.goto.c++
+    - match: \breturn\b
+      scope: keyword.control.flow.return.c++
+    - match: \bthrow\b
+      scope: keyword.control.flow.throw.c++
+    - match: \b({{control_keywords}})\b
+      scope: keyword.control.c++
+    - match: '\bdelete\b(\s*\[\])?|\bnew\b(?!])'
+      scope: keyword.control.c++
+    - match: \b({{operator_keywords}})\b
+      scope: keyword.operator.word.c++
+
+  unique-types:
+    - match: \b(char16_t|char32_t|wchar_t|nullptr_t)\b
+      scope: storage.type.c++
+    - match: \bclass\b
+      scope: storage.type.c++
+
+  unique-strings:
+    - match: '((?:L|u8|u|U)?R)("([^\(\)\\ ]{0,16})\()'
+      captures:
+        1: storage.type.string.c++
+        2: punctuation.definition.string.begin.c++
+      push:
+        - meta_scope: string.quoted.double.c++
+        - match: '\)\3"'
+          scope: punctuation.definition.string.end.c++
+          pop: true
+        - match: '\{\{|\}\}'
+          scope: constant.character.escape.c++
+        - include: formatting-syntax
+
+  unique-numbers:
+    - match: |-
+        (?x)
+        (?:
+        # floats
+          (?:
+          (?:\b\d(?:[\d']*\d)?\.\d(?:[\d']*\d)?|\B\.\d(?:[\d']*\d)?)(?:[Ee][+-]?\d(?:[\d']*\d)?)?(?:[fFlL]|(?:i[fl]?|h|min|[mun]?s|_\w*))?\b
+          |
+          (?:\b\d(?:[\d']*\d)?\.)(?:\B|(?:[fFlL]|(?:i[fl]?|h|min|[mun]?s|_\w*))\b|(?:[Ee][+-]?\d(?:[\d']*\d)?)(?:[fFlL]|(?:i[fl]?|h|min|[mun]?s|_\w*))?\b)
+          |
+          \b\d(?:[\d']*\d)?(?:[Ee][+-]?\d(?:[\d']*\d)?)(?:[fFlL]|(?:i[fl]?|h|min|[mun]?s|_\w*))?\b
+          )
+        |
+        # ints
+          \b(?:
+          (?:
+          # dec
+          [1-9](?:[\d']*\d)?
+          |
+          # oct
+          0(?:[0-7']*[0-7])?
+          |
+          # hex
+          0[Xx][\da-fA-F](?:[\da-fA-F']*[\da-fA-F])?
+          |
+          # bin
+          0[Bb][01](?:[01']*[01])?
+          )
+          # int suffixes
+          (?:(?:l{1,2}|L{1,2})[uU]?|[uU](?:l{0,2}|L{0,2})|(?:i[fl]?|h|min|[mun]?s|_\w*))?)\b
+        )
+        (?!\.) # Number must not be followed by a decimal point
+      scope: constant.numeric.c++
+
+  identifiers:
+    - match: '{{identifier}}\s*(::)\s*'
+      captures:
+        1: punctuation.accessor.c++
+    - match: '(?:(::)\s*)?{{identifier}}'
+      captures:
+        1: punctuation.accessor.c++
+
+  function-specifiers:
+    - match: \b(const|final|noexcept|override)\b
+      scope: storage.modifier.c++
+
+  #############################################################################
+  # The following are C++-specific contexts that should not be reused. This is
+  # because they push into subcontexts and use variables that are C++-specific.
+  #############################################################################
+
+  ## Common context layout
+
+  global:
+    - match: '(?=\btemplate\b)'
+      push:
+        - include: template
+        - match: (?=\S)
+          set: global-modifier
+    - include: namespace
+    - include: keywords-angle-brackets
+    - match: '(?={{path_lookahead}}\s*<)'
+      push: global-modifier
+    # Take care of comments just before a function definition.
+    - match: /\*
+      scope: punctuation.definition.comment.c
+      push:
+        - - match: \s*(?=\w)
+            set: global-modifier
+          - match: ""
+            pop: true
+        - - meta_scope: comment.block.c
+          - match: \*/
+            scope: punctuation.definition.comment.c
+            pop: true
+    - include: early-expressions
+    - match: ^\s*\b(extern)(?=\s+"C(\+\+)?")
+      scope: storage.modifier.c++
+      push:
+        - include: comments
+        - include: strings
+        - match: '\{'
+          scope: punctuation.section.block.begin.c++
+          set:
+            - meta_scope: meta.extern-c.c++
+            - match: '^\s*(#\s*ifdef)\s*__cplusplus\s*'
+              scope: meta.preprocessor.c++
+              captures:
+                1: keyword.control.import.c++
+              set:
+                - match: '\}'
+                  scope: punctuation.section.block.end.c++
+                  pop: true
+                - include: preprocessor-global
+                - include: global
+            - match: '\}'
+              scope: punctuation.section.block.end.c++
+              pop: true
+            - include: preprocessor-global
+            - include: global
+        - match: (?=\S)
+          set: global-modifier
+    - match: ^\s*(?=\w)
+      push: global-modifier
+    - include: late-expressions
+
+  statements:
+    - include: preprocessor-statements
+    - include: scope:source.c#label
+    - include: expressions
+
+  expressions:
+    - include: early-expressions
+    - include: late-expressions
+
+  early-expressions:
+    - include: early-expressions-before-generic-type
+    - include: generic-type
+    - include: early-expressions-after-generic-type
+
+  early-expressions-before-generic-type:
+    - include: preprocessor-expressions
+    - include: comments
+    - include: case-default
+    - include: typedef
+    - include: keywords-angle-brackets
+    - include: keywords-parens
+    - include: keywords
+    - include: numbers
+    # Prevent a '<' from getting scoped as the start of another template
+    # parameter list, if in reality a less-than-or-equals sign is meant.
+    - match: <=
+      scope: keyword.operator.comparison.c
+
+  early-expressions-after-generic-type:
+    - include: members-arrow
+    - include: operators
+    - include: members-dot
+    - include: strings
+    - include: parens
+    - include: brackets
+    - include: block
+    - include: variables
+    - include: constants
+    - match: ','
+      scope: punctuation.separator.c++
+    - match: '\)|\}'
+      scope: invalid.illegal.stray-bracket-end.c++
+
+  expressions-minus-generic-type:
+    - include: early-expressions-before-generic-type
+    - include: angle-brackets
+    - include: early-expressions-after-generic-type
+    - include: late-expressions
+
+  expressions-minus-generic-type-function-call:
+    - include: early-expressions-before-generic-type
+    - include: angle-brackets
+    - include: early-expressions-after-generic-type
+    - include: late-expressions-before-function-call
+    - include: identifiers
+    - match: ';'
+      scope: punctuation.terminator.c++
+
+  late-expressions:
+    - include: late-expressions-before-function-call
+    - include: function-call
+    - include: identifiers
+    - match: ';'
+      scope: punctuation.terminator.c++
+
+  late-expressions-before-function-call:
+    - include: unique-late-expressions
+    - include: modifiers-parens
+    - include: modifiers
+    - include: types
+
+  expressions-minus-function-call:
+    - include: early-expressions
+    - include: late-expressions-before-function-call
+    - include: identifiers
+    - match: ';'
+      scope: punctuation.terminator.c++
+
+  comments:
+    - include: scope:source.c#comments
+
+  operators:
+    - include: scope:source.c#operators
+
+  modifiers:
+    - include: unique-modifiers
+    - include: scope:source.c#modifiers
+
+  variables:
+    - include: unique-variables
+    - include: scope:source.c#variables
+
+  constants:
+    - include: unique-constants
+    - include: scope:source.c#constants
+
+  keywords:
+    - include: unique-keywords
+    - include: scope:source.c#keywords
+
+  types:
+    - include: unique-types
+    - include: types-parens
+    - include: scope:source.c#types
+
+  strings:
+    - include: unique-strings
+    - match: '(L|u8|u|U)?(")'
+      captures:
+        1: storage.type.string.c++
+        2: punctuation.definition.string.begin.c++
+      push:
+        - meta_scope: string.quoted.double.c++
+        - match: '"'
+          scope: punctuation.definition.string.end.c++
+          pop: true
+        - include: scope:source.c#string_escaped_char
+        - match: |-
+            (?x)%
+              (\d+\$)?                                      # field (argument #)
+              [#0\- +']*                                    # flags
+              [,;:_]?                                       # separator character (AltiVec)
+              ((-?\d+)|\*(-?\d+\$)?)?                       # minimum field width
+              (\.((-?\d+)|\*(-?\d+\$)?)?)?                  # precision
+              (hh|h|ll|l|j|t|z|q|L|vh|vl|v|hv|hl)?          # length modifier
+              (\[[^\]]+\]|[am]s|[diouxXDOUeEfFgGaACcSspn%]) # conversion type
+          scope: constant.other.placeholder.c++
+        - match: '\{\{|\}\}'
+          scope: constant.character.escape.c++
+        - include: formatting-syntax
+    - include: scope:source.c#strings
+
+  formatting-syntax:
+    # https://docs.python.org/3.6/library/string.html#formatstrings
+    - match: |- # simple form
+        (?x)
+        (\{)
+          (?: [\w.\[\]]+)?             # field_name
+          (   ! [ars])?                # conversion
+          (   : (?:{{format_spec}}|    # format_spec OR
+                   [^}%]*%.[^}]*)      # any format-like string
+          )?
+        (\})
+      scope: constant.other.placeholder.c++
+      captures:
+        1: punctuation.definition.placeholder.begin.c++
+        2: storage.modifier.c++onversion.c++
+        3: constant.other.format-spec.c++
+        4: punctuation.definition.placeholder.end.c++
+    - match: \{(?=[^\}"']+\{[^"']*\}) # complex (nested) form
+      scope: punctuation.definition.placeholder.begin.c++
+      push:
+        - meta_scope: constant.other.placeholder.c++
+        - match: \}
+          scope: punctuation.definition.placeholder.end.c++
+          pop: true
+        - match: '[\w.\[\]]+'
+        - match: '![ars]'
+          scope: storage.modifier.conversion.c++
+        - match: ':'
+          push:
+            - meta_scope: meta.format-spec.c++ constant.other.format-spec.c++
+            - match: (?=\})
+              pop: true
+            - include: formatting-syntax
+
+  numbers:
+    - include: unique-numbers
+    - include: scope:source.c#numbers
+
+  ## C++-specific contexts
+
+  case-default:
+    - match: '\b(default|case)\b'
+      scope: keyword.control.c++
+      push:
+        - match: (?=[);,])
+          pop: true
+        - match: ':'
+          scope: punctuation.separator.c++
+          pop: true
+        - include: expressions
+
+  modifiers-parens:
+    - match: '\b(alignas)\b\s*(\()'
+      captures:
+        1: storage.modifier.c++
+        2: meta.group.c++ punctuation.section.group.begin.c++
+      push:
+        - meta_content_scope: meta.group.c++
+        - match: '\)'
+          scope: meta.group.c++ punctuation.section.group.end.c++
+          pop: true
+        - include: expressions
+    - match: \b(__attribute__)\s*(\(\()
+      captures:
+        1: storage.modifier.c++
+        2: meta.group.c++ punctuation.section.group.begin.c++
+      push :
+        - meta_scope: meta.attribute.c++
+        - meta_content_scope: meta.group.c++
+        - include: parens
+        - include: strings
+        - match: \)\)
+          scope: meta.group.c++ punctuation.section.group.end.c++
+          pop: true
+    - match: \b(__declspec)(\()
+      captures:
+        1: storage.modifier.c++
+        2: meta.group.c++ punctuation.section.group.begin.c++
+      push:
+        - meta_content_scope: meta.group.c++
+        - match: '\)'
+          scope: meta.group.c++ punctuation.section.group.end.c++
+          pop: true
+        - match: '\b(align|allocate|code_seg|deprecated|property|uuid)\b\s*(\()'
+          captures:
+            1: storage.modifier.c++
+            2: meta.group.c++ punctuation.section.group.begin.c++
+          push:
+            - meta_content_scope: meta.group.c++
+            - match: '\)'
+              scope: meta.group.c++ punctuation.section.group.end.c++
+              pop: true
+            - include: numbers
+            - include: strings
+            - match: \b(get|put)\b
+              scope: variable.parameter.c++
+            - match: ','
+              scope: punctuation.separator.c++
+            - match: '='
+              scope: keyword.operator.assignment.c++
+        - match: '\b(appdomain|deprecated|dllimport|dllexport|jintrinsic|naked|noalias|noinline|noreturn|nothrow|novtable|process|restrict|safebuffers|selectany|thread)\b'
+          scope: constant.other.c++
+
+  types-parens:
+    - match: '\b(decltype)\b\s*(\()'
+      captures:
+        1: storage.type.c++
+        2: meta.group.c++ punctuation.section.group.begin.c++
+      push:
+        - meta_content_scope: meta.group.c++
+        - match: '\)'
+          scope: meta.group.c++ punctuation.section.group.end.c++
+          pop: true
+        - include: expressions
+
+  keywords-angle-brackets:
+    - match: \b({{casts}})\b\s*
+      scope: keyword.operator.word.cast.c++
+      push:
+        - match: '>'
+          scope: punctuation.section.generic.end.c++
+          pop: true
+        - match: '<'
+          scope: punctuation.section.generic.begin.c++
+          push:
+            - match: '(?=>)'
+              pop: true
+            - include: expressions-minus-generic-type-function-call
+
+  keywords-parens:
+    - match: '\b(alignof|typeid|static_assert|sizeof)\b\s*(\()'
+      captures:
+        1: keyword.operator.word.c++
+        2: meta.group.c++ punctuation.section.group.begin.c++
+      push:
+        - meta_content_scope: meta.group.c++
+        - match: '\)'
+          scope: meta.group.c++ punctuation.section.group.end.c++
+          pop: true
+        - include: expressions
+
+  namespace:
+    - match: '\b(using)\s+(namespace)\s+(?={{path_lookahead}})'
+      captures:
+        1: keyword.control.c++
+        2: keyword.control.c++
+      push:
+        - include: identifiers
+        - match: ''
+          pop: true
+    - match: '\b(namespace)\s+(?=({{path_lookahead}})?(?!\s*[;,]))'
+      scope: meta.namespace.c++
+      captures:
+        1: keyword.control.c++
+      push:
+        - meta_content_scope: meta.namespace.c++ entity.name.namespace.c++
+        - include: identifiers
+        - match: ''
+          set:
+            - meta_scope: meta.namespace.c++
+            - include: comments
+            - match: '='
+              scope: keyword.operator.alias.c++
+            - match: '(?=;)'
+              pop: true
+            - match: '\}'
+              scope: meta.block.c++ punctuation.section.block.end.c++
+              pop: true
+            - match: '\{'
+              scope: punctuation.section.block.begin.c++
+              push:
+                - meta_scope: meta.block.c++
+                - match: '(?=\})'
+                  pop: true
+                - include: preprocessor-global
+                - include: global
+            - include: expressions
+
+  template-common:
+    # Exit the template scope if we hit some basic invalid characters. This
+    # helps when a user is in the middle of typing their template types and
+    # prevents re-highlighting the whole file until the next > is found.
+    - match: (?=[{};])
+      pop: true
+    - include: expressions
+
+  template:
+    - match: \btemplate\b
+      scope: storage.type.template.c++
+      push:
+        - meta_scope: meta.template.c++
+        # Explicitly include comments here at the top, in order to NOT match the
+        # \S lookahead in the case of comments.
+        - include: comments
+        - match: <
+          scope: punctuation.section.generic.begin.c++
+          set:
+            - meta_content_scope: meta.template.c++
+            - match: '>'
+              scope: meta.template.c++ punctuation.section.generic.end.c++
+              pop: true
+            - match: \.{3}
+              scope: keyword.operator.variadic.c++
+            - match: \b(typename|{{before_tag}})\b
+              scope: storage.type.c++
+            - include: template # include template here for nested templates
+            - include: template-common
+        - match: (?=\S)
+          set:
+            - meta_content_scope: meta.template.c++
+            - match: \b({{before_tag}})\b
+              scope: storage.type.c++
+            - include: template-common
+
+  generic-type:
+    - match: '(?=(?!template){{path_lookahead}}\s*{{generic_lookahead}}\s*\()'
+      push:
+        - meta_scope: meta.function-call.c++
+        - match: \btemplate\b
+          scope: storage.type.template.c++
+        - match: '(?:(::)\s*)?{{identifier}}\s*(::)\s*'
+          captures:
+            1: punctuation.accessor.double-colon.c++
+            2: punctuation.accessor.double-colon.c++
+        - match: (?:(::)\s*)?({{identifier}})\s*(<)
+          captures:
+            1: punctuation.accessor.double-colon.c++
+            2: variable.function.c++
+            3: punctuation.section.generic.begin.c++
+          push:
+            - match: '>'
+              scope: punctuation.section.generic.end.c++
+              pop: true
+            - include: expressions-minus-generic-type-function-call
+        - match: (?:(::)\s*)?({{identifier}})\s*(\()
+          captures:
+            1: punctuation.accessor.double-colon.c++
+            2: variable.function.c++
+            3: punctuation.section.group.begin.c++
+          set:
+            - meta_scope: meta.function-call.c++
+            - meta_content_scope: meta.group.c++
+            - match: '\)'
+              scope: meta.group.c++ punctuation.section.group.end.c++
+              pop: true
+            - include: expressions
+        - include: angle-brackets
+        - match: '\('
+          scope: meta.group.c++ punctuation.section.group.begin.c++
+          set:
+            - meta_scope: meta.function-call.c++
+            - meta_content_scope: meta.group.c++
+            - match: '\)'
+              scope: meta.group.c++ punctuation.section.group.end.c++
+              pop: true
+            - include: expressions
+    - match: '(?=(?!template){{path_lookahead}}\s*{{generic_lookahead}})'
+      push:
+        - include: identifiers
+        - match: '<'
+          scope: punctuation.section.generic.begin.c++
+          set:
+            - match: '>'
+              scope: punctuation.section.generic.end.c++
+              pop: true
+            - include: expressions-minus-generic-type-function-call
+
+  angle-brackets:
+    - match: '<(?!<)'
+      scope: punctuation.section.generic.begin.c++
+      push:
+        - match: '>'
+          scope: punctuation.section.generic.end.c++
+          pop: true
+        - include: expressions-minus-generic-type-function-call
+
+  block:
+    - match: '\{'
+      scope: punctuation.section.block.begin.c++
+      push:
+        - meta_scope: meta.block.c++
+        - match: (?=^\s*#\s*(elif|else|endif)\b)
+          pop: true
+        - match: '\}'
+          scope: punctuation.section.block.end.c++
+          pop: true
+        - include: statements
+
+  function-call:
+    - match: (?={{path_lookahead}}\s*\()
+      push:
+        - meta_scope: meta.function-call.c++
+        - include: scope:source.c#c99
+        - match: '(?:(::)\s*)?{{identifier}}\s*(::)\s*'
+          scope: variable.function.c++
+          captures:
+            1: punctuation.accessor.c++
+            2: punctuation.accessor.c++
+        - match: '(?:(::)\s*)?{{identifier}}'
+          scope: variable.function.c++
+          captures:
+            1: punctuation.accessor.c++
+        - match: '\('
+          scope: meta.group.c++ punctuation.section.group.begin.c++
+          set:
+            - meta_content_scope: meta.function-call.c++ meta.group.c++
+            - match: '\)'
+              scope: meta.function-call.c++ meta.group.c++ punctuation.section.group.end.c++
+              pop: true
+            - include: expressions
+
+  members-inside-function-call:
+    - meta_content_scope: meta.method-call.c++ meta.group.c++
+    - match: \)
+      scope: meta.method-call.c++ meta.group.c++ punctuation.section.group.end.c++
+      pop: true
+    - include: expressions
+
+  members-after-accessor-junction:
+    # After we've seen an accessor (dot or arrow), this context decides what
+    # kind of entity we're accessing.
+    - include: comments
+    - match: \btemplate\b
+      scope: meta.method-call.c++ storage.type.template.c++
+      # Guaranteed to be a template member function call after we match this
+      set:
+        - meta_content_scope: meta.method-call.c++
+        - include: comments
+        - match: '{{identifier}}'
+          scope: variable.function.member.c++
+          set:
+            - meta_content_scope: meta.method-call.c++
+            - match: \(
+              scope: meta.group.c++ punctuation.section.group.begin.c++
+              set: members-inside-function-call
+            - include: comments
+            - include: angle-brackets
+            - match: (?=\S) # safety pop
+              pop: true
+        - match: (?=\S) # safety pop
+          pop: true
+    # Operator overloading
+    - match: '({{operator_method_name}})\s*(\()'
+      captures:
+        0: meta.method-call.c++
+        1: variable.function.member.c++
+        2: meta.group.c++ punctuation.section.group.begin.c++
+      set: members-inside-function-call
+    # Non-templated member function call
+    - match: (~?{{identifier}})\s*(\()
+      captures:
+        0: meta.method-call.c++
+        1: variable.function.member.c++
+        2: meta.group.c++ punctuation.section.group.begin.c++
+      set: members-inside-function-call
+    # Templated member function call
+    - match: (~?{{identifier}})\s*(?={{generic_lookahead}})
+      captures:
+        1: variable.function.member.c++
+      set:
+        - meta_scope: meta.method-call.c++
+        - match: <
+          scope: punctuation.section.generic.begin.c++
+          set:
+            - meta_content_scope: meta.method-call.c++
+            - match: '>'
+              scope: punctuation.section.generic.end.c++
+              set:
+                - meta_content_scope: meta.method-call.c++
+                - include: comments
+                - match: \(
+                  scope: punctuation.section.group.begin.c++
+                  set: members-inside-function-call
+                - match: (?=\S) # safety pop
+                  pop: true
+            - include: expressions
+    # Explicit base-class access
+    - match: ({{identifier}})\s*(::)
+      captures:
+        1: variable.other.base-class.c++
+        2: punctuation.accessor.double-colon.c++
+      set: members-after-accessor-junction # reset
+    # Just a regular member variable
+    - match: '{{identifier}}'
+      scope: variable.other.readwrite.member.c++
+      pop: true
+
+  members-dot:
+    - include: scope:source.c#access-illegal
+    # No lookahead required because members-dot goes after operators in the
+    # early-expressions-after-generic-type context. This means triple dots
+    # (i.e. "..." or "variadic") is attempted first.
+    - match: \.
+      scope: punctuation.accessor.dot.c++
+      push: members-after-accessor-junction
+
+  members-arrow:
+    # This needs to be before operators in the
+    # early-expressions-after-generic-type context because otherwise the "->"
+    # from the C language will match.
+    - match: ->
+      scope: punctuation.accessor.arrow.c++
+      push: members-after-accessor-junction
+
+  typedef:
+    - match: \btypedef\b
+      scope: storage.type.c++
+      push:
+        - match: ({{identifier}})?\s*(?=;)
+          captures:
+            1: entity.name.type.typedef.c++
+          pop: true
+        - match: \b(struct)\s+({{identifier}})\b
+          captures:
+            1: storage.type.c++
+        - include: expressions-minus-generic-type
+
+  parens:
+    - match: \(
+      scope: punctuation.section.group.begin.c++
+      push:
+        - meta_scope: meta.group.c++
+        - match: \)
+          scope: punctuation.section.group.end.c++
+          pop: true
+        - include: expressions
+
+  brackets:
+    - match: \[
+      scope: punctuation.section.brackets.begin.c++
+      push:
+        - meta_scope: meta.brackets.c++
+        - match: \]
+          scope: punctuation.section.brackets.end.c++
+          pop: true
+        - include: expressions
+
+  function-trailing-return-type:
+    - match: '{{non_angle_brackets}}'
+      pop: true
+    - include: angle-brackets
+    - include: types
+    - include: modifiers-parens
+    - include: modifiers
+    - include: identifiers
+    - match: \*|&
+      scope: keyword.operator.c++
+    - include: function-trailing-return-type-parens
+    - match: '(?=\S)'
+      pop: true
+
+  function-trailing-return-type-parens:
+    - match: \(
+      scope: punctuation.section.group.begin.c++
+      push:
+        - meta_scope: meta.group.c++
+        - match: \)
+          scope: punctuation.section.group.end.c++
+          pop: true
+        - include: function-trailing-return-type
+
+  ## Detection of function and data structure definitions at the global level
+
+  global-modifier:
+    - include: comments
+    - include: modifiers-parens
+    - include: modifiers
+    # Constructors and destructors don't have a type
+    - match: '(?={{path_lookahead}}\s*::\s*{{identifier}}\s*(\(|$))'
+      set:
+        - meta_content_scope: meta.function.c++ entity.name.function.constructor.c++
+        - include: identifiers
+        - match: '(?=[^\w\s])'
+          set: function-definition-params
+    - match: '(?={{path_lookahead}}\s*::\s*~{{identifier}}\s*(\(|$))'
+      set:
+        - meta_content_scope: meta.function.c++ entity.name.function.destructor.c++
+        - include: identifiers
+        - match: '~{{identifier}}'
+        - match: '(?=[^\w\s])'
+          set: function-definition-params
+    # If we see a path ending in :: before a newline, we don't know if it is
+    # a constructor or destructor, or a long return type, so we are just going
+    # to treat it like a regular function. Most likely it is a constructor,
+    # since it doesn't seem most developers would create such a long typename.
+    - match: '(?={{path_lookahead}}\s*::\s*$)'
+      set:
+        - meta_content_scope: meta.function.c++ entity.name.function.c++
+        - include: identifiers
+        - match: '~{{identifier}}'
+        - match: '(?=[^\w\s])'
+          set: function-definition-params
+    - include: unique-strings
+    - match: '(?=\S)'
+      set: global-type
+
+  global-type:
+    - include: comments
+    - match: \*|&
+      scope: keyword.operator.c++
+    - match: '(?=\b({{control_keywords}}|{{operator_keywords}}|{{casts}}|{{memory_operators}}|{{other_keywords}}|operator)\b)'
+      pop: true
+    - match: '(?=\s)'
+      set: global-maybe-function
+    # If a class/struct/enum followed by a name that is not a macro or declspec
+    # then this is likely a return type of a function. This is uncommon.
+    - match: |-
+        (?x:
+          ({{before_tag}})
+          \s+
+          (?=
+            (?![[:upper:][:digit:]_]+\b|__declspec|{{before_tag}})
+            {{path_lookahead}}
+            (\s+{{identifier}}\s*\(|\s*[*&])
+          )
+        )
+      captures:
+        1: storage.type.c++
+      set:
+        - include: identifiers
+        - match: ''
+          set: global-maybe-function
+    # The previous match handles return types of struct/enum/etc from a func,
+    # there this one exits the context to allow matching an actual struct/class
+    - match: '(?=\b({{before_tag}})\b)'
+      set: data-structures
+    - match: '(?=\b({{casts}})\b\s*<)'
+      pop: true
+    - match: '{{non_angle_brackets}}'
+      pop: true
+    - include: angle-brackets
+    - include: types
+    # Allow a macro call
+    - match: '({{identifier}})\s*(\()(?=[^\)]+\))'
+      captures:
+        1: variable.function.c++
+        2: meta.group.c++ punctuation.section.group.begin.c++
+      push:
+        - meta_scope: meta.function-call.c++
+        - meta_content_scope: meta.group.c++
+        - match: '\)'
+          scope: meta.group.c++ punctuation.section.group.end.c++
+          pop: true
+        - include: expressions
+    - match: '(?={{path_lookahead}}\s*\()'
+      set:
+        - include: function-call
+        - match: ''
+          pop: true
+    - include: variables
+    - include: constants
+    - include: identifiers
+    - match: (?=\W)
+      pop: true
+
+  global-maybe-function:
+    - include: comments
+    # Consume pointer info, macros and any type info that was offset by macros
+    - match: \*|&
+      scope: keyword.operator.c++
+    - match: '(?=\b({{control_keywords}}|{{operator_keywords}}|{{casts}}|{{memory_operators}}|{{other_keywords}})\b)'
+      pop: true
+    - match: '\b({{type_qualifier}})\b'
+      scope: storage.modifier.c++
+    - match: '{{non_angle_brackets}}'
+      pop: true
+    - include: angle-brackets
+    - include: types
+    - include: modifiers-parens
+    - include: modifiers
+    # All uppercase identifier just before a newline is most likely a macro
+    - match: '[[:upper:][:digit:]_]+\s*$'
+    # Operator overloading
+    - match: '(?=({{path_lookahead}}\s*(?:{{generic_lookahead}})?::\s*)?{{operator_method_name}}\s*(\(|$))'
+      set:
+        - meta_content_scope: meta.function.c++ entity.name.function.c++
+        - include: identifiers
+        - match: '(?=\s*(\(|$))'
+          set: function-definition-params
+    # Identifier that is not the function name - likely a macro or type
+    - match: '(?={{path_lookahead}}([ \t]+|[*&])(?!\s*(<|::|\(|$)))'
+      push:
+        - include: identifiers
+        - match: ''
+          pop: true
+    # Real function definition
+    - match: '(?={{path_lookahead}}({{generic_lookahead}}({{path_lookahead}})?)\s*(\(|$))'
+      set: [function-definition-params, global-function-identifier-generic]
+    - match: '(?={{path_lookahead}}\s*(\(|$))'
+      set: [function-definition-params, global-function-identifier]
+    - match: '(?={{path_lookahead}}\s*::\s*$)'
+      set: [function-definition-params, global-function-identifier]
+    - match: '(?=\S)'
+      pop: true
+
+  global-function-identifier-generic:
+    - include: angle-brackets
+    - match: '::'
+      scope: punctuation.accessor.c++
+    - match: '(?={{identifier}}<.*>\s*\()'
+      push:
+        - meta_content_scope: entity.name.function.c++
+        - include: identifiers
+        - match: '(?=<)'
+          pop: true
+    - match: '(?={{identifier}}\s*\()'
+      push:
+        - meta_content_scope: entity.name.function.c++
+        - include: identifiers
+        - match: ''
+          pop: true
+    - match: '(?=\()'
+      pop: true
+
+  global-function-identifier:
+    - meta_content_scope: entity.name.function.c++
+    - include: identifiers
+    - match: '(?=\S)'
+      pop: true
+
+  function-definition-params:
+    - meta_content_scope: meta.function.c++
+    - include: comments
+    - match: '(?=\()'
+      set:
+        - match: \(
+          scope: meta.function.parameters.c++ meta.group.c++ punctuation.section.group.begin.c++
+          set:
+            - meta_content_scope: meta.function.parameters.c++ meta.group.c++
+            - match : \)
+              scope: punctuation.section.group.end.c++
+              set: function-definition-continue
+            - match: '\bvoid\b'
+              scope: storage.type.c++
+            - match: '{{identifier}}(?=\s*(\[|,|\)|=))'
+              scope: variable.parameter.c++
+            - match: '='
+              scope: keyword.operator.assignment.c++
+              push:
+                - match: '(?=,|\))'
+                  pop: true
+                - include: expressions-minus-generic-type
+                - include: scope:source.c#preprocessor-line-continuation
+            - include: expressions-minus-generic-type
+            - include: scope:source.c#preprocessor-line-continuation
+    - match: (?=\S)
+      pop: true
+
+  function-definition-continue:
+    - meta_content_scope: meta.function.c++
+    - include: comments
+    - match: '(?=;)'
+      pop: true
+    - match: '->'
+      scope: punctuation.separator.c++
+      set: function-definition-trailing-return
+    - include: function-specifiers
+    - match: '='
+      scope: keyword.operator.assignment.c++
+    - match: '&'
+      scope: keyword.operator.c++
+    - match: \b0\b
+      scope: constant.numeric.c++
+    - match: \b(default|delete)\b
+      scope: storage.modifier.c++
+    - match: '(?=\{)'
+      set: function-definition-body
+    - match: '(?=\S)'
+      pop: true
+
+  function-definition-trailing-return:
+    - include: comments
+    - match: '(?=;)'
+      pop: true
+    - match: '(?=\{)'
+      set: function-definition-body
+    - include: function-specifiers
+    - include: function-trailing-return-type
+
+  function-definition-body:
+    - meta_content_scope: meta.function.c++ meta.block.c++
+    - match: '\{'
+      scope: punctuation.section.block.begin.c++
+      set:
+        - meta_content_scope: meta.function.c++ meta.block.c++
+        - match: '\}'
+          scope: meta.function.c++ meta.block.c++ punctuation.section.block.end.c++
+          pop: true
+        - match: (?=^\s*#\s*(elif|else|endif)\b)
+          pop: true
+        - match: '(?=({{before_tag}})([^(;]+$|.*\{))'
+          push: data-structures
+        - include: statements
+
+  ## Data structures including classes, structs, unions and enums
+
+  data-structures:
+    - match: '\bclass\b'
+      scope: storage.type.c++
+      set: data-structures-class-definition
+    # Detect variable type definitions using struct/enum/union followed by a tag
+    - match: '\b({{before_tag}})(?=\s+{{path_lookahead}}\s+{{path_lookahead}}\s*[=;\[])'
+      scope: storage.type.c++
+    - match: '\bstruct\b'
+      scope: storage.type.c++
+      set: data-structures-struct-definition
+    - match: '\benum(\s+(class|struct))?\b'
+      scope: storage.type.c++
+      set: data-structures-enum-definition
+    - match: '\bunion\b'
+      scope: storage.type.c++
+      set: data-structures-union-definition
+    - match: '(?=\S)'
+      pop: true
+
+  preprocessor-workaround-eat-macro-before-identifier:
+    # Handle macros so they aren't matched as the class name
+    - match: ({{macro_identifier}})(?=\s+~?{{identifier}})
+      captures:
+        1: meta.assumed-macro.c
+
+  data-structures-class-definition:
+    - meta_scope: meta.class.c++
+    - include: data-structures-definition-common-begin
+    - match: '{{identifier}}(?={{data_structures_forward_decl_lookahead}})'
+      scope: entity.name.class.forward-decl.c++
+      set: data-structures-class-definition-after-identifier
+    - match: '{{identifier}}'
+      scope: entity.name.class.c++
+      set: data-structures-class-definition-after-identifier
+    - match: '(?=[:{])'
+      set: data-structures-class-definition-after-identifier
+    - match: '(?=;)'
+      pop: true
+
+  data-structures-class-definition-after-identifier:
+    - meta_content_scope: meta.class.c++
+    - include: data-structures-definition-common-begin
+    # No matching of identifiers since they should all be macros at this point
+    - include: data-structures-definition-common-end
+    - match: '\{'
+      scope: meta.block.c++ punctuation.section.block.begin.c++
+      set:
+        - meta_content_scope: meta.class.c++ meta.block.c++
+        - match: '\}'
+          scope: meta.class.c++ meta.block.c++ punctuation.section.block.end.c++
+          pop: true
+        - include: data-structures-body
+
+  data-structures-struct-definition:
+    - meta_scope: meta.struct.c++
+    - include: data-structures-definition-common-begin
+    - match: '{{identifier}}(?={{data_structures_forward_decl_lookahead}})'
+      scope: entity.name.struct.forward-decl.c++
+      set: data-structures-struct-definition-after-identifier
+    - match: '{{identifier}}'
+      scope: entity.name.struct.c++
+      set: data-structures-struct-definition-after-identifier
+    - match: '(?=[:{])'
+      set: data-structures-struct-definition-after-identifier
+    - match: '(?=;)'
+      pop: true
+
+  data-structures-struct-definition-after-identifier:
+    - meta_content_scope: meta.struct.c++
+    - include: data-structures-definition-common-begin
+    # No matching of identifiers since they should all be macros at this point
+    - include: data-structures-definition-common-end
+    - match: '\{'
+      scope: meta.block.c++ punctuation.section.block.begin.c++
+      set:
+        - meta_content_scope: meta.struct.c++ meta.block.c++
+        - match: '\}'
+          scope: meta.struct.c++ meta.block.c++ punctuation.section.block.end.c++
+          pop: true
+        - include: data-structures-body
+
+  data-structures-enum-definition:
+    - meta_scope: meta.enum.c++
+    - include: data-structures-definition-common-begin
+    - match: '{{identifier}}(?={{data_structures_forward_decl_lookahead}})'
+      scope: entity.name.enum.forward-decl.c++
+      set: data-structures-enum-definition-after-identifier
+    - match: '{{identifier}}'
+      scope: entity.name.enum.c++
+      set: data-structures-enum-definition-after-identifier
+    - match: '(?=[:{])'
+      set: data-structures-enum-definition-after-identifier
+    - match: '(?=;)'
+      pop: true
+
+  data-structures-enum-definition-after-identifier:
+    - meta_content_scope: meta.enum.c++
+    - include: data-structures-definition-common-begin
+    # No matching of identifiers since they should all be macros at this point
+    - include: data-structures-definition-common-end
+    - match: '\{'
+      scope: meta.block.c++ punctuation.section.block.begin.c++
+      set:
+        - meta_content_scope: meta.enum.c++ meta.block.c++
+        # Enums don't support methods so we have a simplified body
+        - match: '\}'
+          scope: meta.enum.c++ meta.block.c++ punctuation.section.block.end.c++
+          pop: true
+        - include: statements
+
+  data-structures-union-definition:
+    - meta_scope: meta.union.c++
+    - include: data-structures-definition-common-begin
+    - match: '{{identifier}}(?={{data_structures_forward_decl_lookahead}})'
+      scope: entity.name.union.forward-decl.c++
+      set: data-structures-union-definition-after-identifier
+    - match: '{{identifier}}'
+      scope: entity.name.union.c++
+      set: data-structures-union-definition-after-identifier
+    - match: '(?=[{])'
+      set: data-structures-union-definition-after-identifier
+    - match: '(?=;)'
+      pop: true
+
+  data-structures-union-definition-after-identifier:
+    - meta_content_scope: meta.union.c++
+    - include: data-structures-definition-common-begin
+    # No matching of identifiers since they should all be macros at this point
+    # Unions don't support base classes
+    - include: angle-brackets
+    - match: '\{'
+      scope: meta.block.c++ punctuation.section.block.begin.c++
+      set:
+        - meta_content_scope: meta.union.c++ meta.block.c++
+        - match: '\}'
+          scope: meta.union.c++ meta.block.c++ punctuation.section.block.end.c++
+          pop: true
+        - include: data-structures-body
+    - match: '(?=;)'
+      pop: true
+
+  data-structures-definition-common-begin:
+    - include: comments
+    - match: '(?=\b(?:{{before_tag}}|{{control_keywords}})\b)'
+      pop: true
+    - include: preprocessor-other
+    - include: modifiers-parens
+    - include: modifiers
+    - include: preprocessor-workaround-eat-macro-before-identifier
+
+  data-structures-definition-common-end:
+    - include: angle-brackets
+    - match: \bfinal\b
+      scope: storage.modifier.c++
+    - match: ':'
+      scope: punctuation.separator.c++
+      push:
+        - include: comments
+        - include: preprocessor-other
+        - include: modifiers-parens
+        - include: modifiers
+        - match: '\b(virtual|{{visibility_modifiers}})\b'
+          scope: storage.modifier.c++
+        - match: (?={{path_lookahead}})
+          push:
+            - meta_scope: entity.other.inherited-class.c++
+            - include: identifiers
+            - match: ''
+              pop: true
+        - include: angle-brackets
+        - match: ','
+          scope: punctuation.separator.c++
+        - match: (?=\{|;)
+          pop: true
+    - match: '(?=;)'
+      pop: true
+
+  data-structures-body:
+    - include: preprocessor-data-structures
+    - match: '(?=\btemplate\b)'
+      push:
+        - include: template
+        - match: (?=\S)
+          set: data-structures-modifier
+    - include: typedef
+    - match: \b({{visibility_modifiers}})\s*(:)(?!:)
+      captures:
+        1: storage.modifier.c++
+        2: punctuation.section.class.c++
+    - match: '^\s*(?=(?:~?\w+|::))'
+      push: data-structures-modifier
+    - include: expressions-minus-generic-type
+
+  data-structures-modifier:
+    - match: '\bfriend\b'
+      scope: storage.modifier.c++
+      push:
+        - match: (?=;)
+          pop: true
+        - match: '\{'
+          scope: punctuation.section.block.begin.c++
+          set:
+            - meta_scope: meta.block.c++
+            - match: '\}'
+              scope: punctuation.section.block.end.c++
+              pop: true
+            - include: statements
+        - match: '\b({{before_tag}})\b'
+          scope: storage.type.c++
+        - include: expressions-minus-function-call
+    - include: comments
+    - include: modifiers-parens
+    - include: modifiers
+    - match: '\bstatic_assert(?=\s*\()'
+      scope: meta.static-assert.c++ keyword.operator.word.c++
+      push:
+        - match: '\('
+          scope: meta.group.c++ punctuation.section.group.begin.c++
+          set:
+            - meta_content_scope: meta.function-call.c++ meta.group.c++
+            - match: '\)'
+              scope: meta.function-call.c++ meta.group.c++ punctuation.section.group.end.c++
+              pop: true
+            - include: expressions
+    # Destructor
+    - match: '(?:{{identifier}}\s*(::)\s*)?~{{identifier}}(?=\s*(\(|$))'
+      scope: meta.method.destructor.c++ entity.name.function.destructor.c++
+      captures:
+        1: punctuation.accessor.c++
+      set: method-definition-params
+    # It's a macro, not a constructor if there is no type in the first param
+    - match: '({{identifier}})\s*(\()(?=\s*(?!void){{identifier}}\s*[),])'
+      captures:
+        1: variable.function.c++
+        2: meta.group.c++ punctuation.section.group.begin.c++
+      push:
+        - meta_scope: meta.function-call.c++
+        - meta_content_scope: meta.group.c++
+        - match: '\)'
+          scope: meta.group.c++ punctuation.section.group.end.c++
+          pop: true
+        - include: expressions
+    # Constructor
+    - include: preprocessor-workaround-eat-macro-before-identifier
+    - match: '((?!{{before_tag}}|template){{identifier}})(?=\s*\()'
+      scope: meta.method.constructor.c++ entity.name.function.constructor.c++
+      set: method-definition-params
+    # Long form constructor
+    - match: '({{identifier}}\s*(::)\s*{{identifier}})(?=\s*\()'
+      captures:
+        1: meta.method.constructor.c++ entity.name.function.constructor.c++
+        2: punctuation.accessor.c++
+      push: method-definition-params
+    - match: '(?=\S)'
+      set: data-structures-type
+
+  data-structures-type:
+    - include: comments
+    - match: \*|&
+      scope: keyword.operator.c++
+      # Cast methods
+    - match: '(operator)\s+({{identifier}})(?=\s*(\(|$))'
+      captures:
+        1: keyword.control.c++
+        2: meta.method.c++ entity.name.function.c++
+      set: method-definition-params
+    - match: '(?=\b({{control_keywords}}|{{operator_keywords}}|{{casts}}|{{memory_operators}}|{{other_keywords}}|operator)\b)'
+      pop: true
+    - match: '(?=\s)'
+      set: data-structures-maybe-method
+    # If a class/struct/enum followed by a name that is not a macro or declspec
+    # then this is likely a return type of a function. This is uncommon.
+    - match: |-
+        (?x:
+          ({{before_tag}})
+          \s+
+          (?=
+            (?![[:upper:][:digit:]_]+\b|__declspec|{{before_tag}})
+            {{path_lookahead}}
+            (\s+{{identifier}}\s*\(|\s*[*&])
+          )
+        )
+      captures:
+        1: storage.type.c++
+      set:
+        - include: identifiers
+        - match: ''
+          set: data-structures-maybe-method
+    # The previous match handles return types of struct/enum/etc from a func,
+    # there this one exits the context to allow matching an actual struct/class
+    - match: '(?=\b({{before_tag}})\b)'
+      set: data-structures
+    - match: '(?=\b({{casts}})\b\s*<)'
+      pop: true
+    - match: '{{non_angle_brackets}}'
+      pop: true
+    - include: angle-brackets
+    - include: types
+    - include: variables
+    - include: constants
+    - include: identifiers
+    - match: (?=[&*])
+      set: data-structures-maybe-method
+    - match: (?=\W)
+      pop: true
+
+  data-structures-maybe-method:
+    - include: comments
+    # Consume pointer info, macros and any type info that was offset by macros
+    - match: \*|&
+      scope: keyword.operator.c++
+    - match: '(?=\b({{control_keywords}}|{{operator_keywords}}|{{casts}}|{{memory_operators}}|{{other_keywords}})\b)'
+      pop: true
+    - match: '\b({{type_qualifier}})\b'
+      scope: storage.modifier.c++
+    - match: '{{non_angle_brackets}}'
+      pop: true
+    - include: angle-brackets
+    - include: types
+    - include: modifiers-parens
+    - include: modifiers
+    # Operator overloading
+    - match: '{{operator_method_name}}(?=\s*(\(|$))'
+      scope: meta.method.c++ entity.name.function.c++
+      set: method-definition-params
+    # Identifier that is not the function name - likely a macro or type
+    - match: '(?={{path_lookahead}}([ \t]+|[*&])(?!\s*(<|::|\()))'
+      push:
+        - include: identifiers
+        - match: ''
+          pop: true
+    # Real function definition
+    - match: '(?={{path_lookahead}}({{generic_lookahead}})\s*(\())'
+      set: [method-definition-params, data-structures-function-identifier-generic]
+    - match: '(?={{path_lookahead}}\s*(\())'
+      set: [method-definition-params, data-structures-function-identifier]
+    - match: '(?={{path_lookahead}}\s*::\s*$)'
+      set: [method-definition-params, data-structures-function-identifier]
+    - match: '(?=\S)'
+      pop: true
+
+  data-structures-function-identifier-generic:
+    - include: angle-brackets
+    - match: '(?={{identifier}})'
+      push:
+        - meta_content_scope: entity.name.function.c++
+        - include: identifiers
+        - match: '(?=<)'
+          pop: true
+    - match: '(?=\()'
+      pop: true
+
+  data-structures-function-identifier:
+    - meta_content_scope: entity.name.function.c++
+    - include: identifiers
+    - match: '(?=\S)'
+      pop: true
+
+  method-definition-params:
+    - meta_content_scope: meta.method.c++
+    - include: comments
+    - match: '(?=\()'
+      set:
+        - match: \(
+          scope: meta.method.parameters.c++ meta.group.c++ punctuation.section.group.begin.c++
+          set:
+            - meta_content_scope: meta.method.parameters.c++ meta.group.c++
+            - match : \)
+              scope: punctuation.section.group.end.c++
+              set: method-definition-continue
+            - match: '\bvoid\b'
+              scope: storage.type.c++
+            - match: '{{identifier}}(?=\s*(\[|,|\)|=))'
+              scope: variable.parameter.c++
+            - match: '='
+              scope: keyword.operator.assignment.c++
+              push:
+                - match: '(?=,|\))'
+                  pop: true
+                - include: expressions-minus-generic-type
+            - include: expressions-minus-generic-type
+    - match: '(?=\S)'
+      pop: true
+
+  method-definition-continue:
+    - meta_content_scope: meta.method.c++
+    - include: comments
+    - match: '(?=;)'
+      pop: true
+    - match: '->'
+      scope: punctuation.separator.c++
+      set: method-definition-trailing-return
+    - include: function-specifiers
+    - match: '='
+      scope: keyword.operator.assignment.c++
+    - match: '&'
+      scope: keyword.operator.c++
+    - match: \b0\b
+      scope: constant.numeric.c++
+    - match: \b(default|delete)\b
+      scope: storage.modifier.c++
+    - match: '(?=:)'
+      set:
+        - match: ':'
+          scope: punctuation.separator.initializer-list.c++
+          set:
+            - meta_scope: meta.method.constructor.initializer-list.c++
+            - match: '{{identifier}}'
+              scope: variable.other.readwrite.member.c++
+              push:
+                - match: \(
+                  scope: meta.group.c++ punctuation.section.group.begin.c++
+                  set:
+                    - meta_content_scope: meta.group.c++
+                    - match: \)
+                      scope: meta.group.c++ punctuation.section.group.end.c++
+                      pop: true
+                    - include: expressions
+                - match: \{
+                  scope: meta.group.c++ punctuation.section.group.begin.c++
+                  set:
+                    - meta_content_scope: meta.group.c++
+                    - match: \}
+                      scope: meta.group.c++ punctuation.section.group.end.c++
+                      pop: true
+                    - include: expressions
+                - include: comments
+            - match: (?=\{|;)
+              set: method-definition-continue
+            - include: expressions
+    - match: '(?=\{)'
+      set: method-definition-body
+    - match: '(?=\S)'
+      pop: true
+
+  method-definition-trailing-return:
+    - include: comments
+    - match: '(?=;)'
+      pop: true
+    - match: '(?=\{)'
+      set: method-definition-body
+    - include: function-specifiers
+    - include: function-trailing-return-type
+
+  method-definition-body:
+    - meta_content_scope: meta.method.c++ meta.block.c++
+    - match: '\{'
+      scope: punctuation.section.block.begin.c++
+      set:
+        - meta_content_scope: meta.method.c++ meta.block.c++
+        - match: '\}'
+          scope: meta.method.c++ meta.block.c++ punctuation.section.block.end.c++
+          pop: true
+        - match: (?=^\s*#\s*(elif|else|endif)\b)
+          pop: true
+        - match: '(?=({{before_tag}})([^(;]+$|.*\{))'
+          push: data-structures
+        - include: statements
+
+  ## Preprocessor for data-structures
+
+  preprocessor-data-structures:
+    - include: preprocessor-rule-enabled-data-structures
+    - include: preprocessor-rule-disabled-data-structures
+    - include: preprocessor-practical-workarounds
+
+  preprocessor-rule-disabled-data-structures:
+    - match: ^\s*((#if)\s+(0))\b
+      captures:
+        1: meta.preprocessor.c++
+        2: keyword.control.import.c++
+        3: constant.numeric.preprocessor.c++
+      push:
+        - match: ^\s*(#\s*endif)\b
+          captures:
+            1: meta.preprocessor.c++ keyword.control.import.c++
+          pop: true
+        - match: ^\s*(#\s*else)\b
+          captures:
+            1: meta.preprocessor.c++ keyword.control.import.else.c++
+          push:
+            - match: (?=^\s*#\s*endif\b)
+              pop: true
+            - include: negated-block
+            - include: data-structures-body
+        - match: ""
+          push:
+            - meta_scope: comment.block.preprocessor.if-branch.c++
+            - match: (?=^\s*#\s*(else|endif)\b)
+              pop: true
+            - include: scope:source.c#preprocessor-disabled
+
+  preprocessor-rule-enabled-data-structures:
+    - match: ^\s*((#if)\s+(0*1))\b
+      captures:
+        1: meta.preprocessor.c++
+        2: keyword.control.import.c++
+        3: constant.numeric.preprocessor.c++
+      push:
+        - match: ^\s*(#\s*endif)\b
+          captures:
+            1: meta.preprocessor.c++ keyword.control.import.c++
+          pop: true
+        - match: ^\s*(#\s*else)\b
+          captures:
+            1: meta.preprocessor.c++ keyword.control.import.else.c++
+          push:
+            - meta_content_scope: comment.block.preprocessor.else-branch.c++
+            - match: (?=^\s*#\s*endif\b)
+              pop: true
+            - include: scope:source.c#preprocessor-disabled
+        - match: ""
+          push:
+            - match: (?=^\s*#\s*(else|endif)\b)
+              pop: true
+            - include: negated-block
+            - include: data-structures-body
+
+  ## Preprocessor for global
+
+  preprocessor-global:
+    - include: preprocessor-rule-enabled-global
+    - include: preprocessor-rule-disabled-global
+    - include: preprocessor-rule-other-global
+
+  preprocessor-statements:
+    - include: preprocessor-rule-enabled-statements
+    - include: preprocessor-rule-disabled-statements
+    - include: preprocessor-rule-other-statements
+
+  preprocessor-expressions:
+    - include: scope:source.c#incomplete-inc
+    - include: preprocessor-macro-define
+    - include: scope:source.c#pragma-mark
+    - include: preprocessor-other
+
+  preprocessor-rule-disabled-global:
+    - match: ^\s*((#if)\s+(0))\b
+      captures:
+        1: meta.preprocessor.c++
+        2: keyword.control.import.c++
+        3: constant.numeric.preprocessor.c++
+      push:
+        - match: ^\s*(#\s*endif)\b
+          captures:
+            1: meta.preprocessor.c++ keyword.control.import.c++
+          pop: true
+        - match: ^\s*(#\s*else)\b
+          captures:
+            1: meta.preprocessor.c++ keyword.control.import.else.c++
+          push:
+            - match: (?=^\s*#\s*endif\b)
+              pop: true
+            - include: preprocessor-global
+            - include: negated-block
+            - include: global
+        - match: ""
+          push:
+            - meta_scope: comment.block.preprocessor.if-branch.c++
+            - match: (?=^\s*#\s*(else|endif)\b)
+              pop: true
+            - include: scope:source.c#preprocessor-disabled
+
+  preprocessor-rule-enabled-global:
+    - match: ^\s*((#if)\s+(0*1))\b
+      captures:
+        1: meta.preprocessor.c++
+        2: keyword.control.import.c++
+        3: constant.numeric.preprocessor.c++
+      push:
+        - match: ^\s*(#\s*endif)\b
+          captures:
+            1: meta.preprocessor.c++ keyword.control.import.c++
+          pop: true
+        - match: ^\s*(#\s*else)\b
+          captures:
+            1: meta.preprocessor.c++ keyword.control.import.else.c++
+          push:
+            - meta_content_scope: comment.block.preprocessor.else-branch.c++
+            - match: (?=^\s*#\s*endif\b)
+              pop: true
+            - include: scope:source.c#preprocessor-disabled
+        - match: ""
+          push:
+            - match: (?=^\s*#\s*(else|endif)\b)
+              pop: true
+            - include: preprocessor-global
+            - include: negated-block
+            - include: global
+
+  preprocessor-rule-other-global:
+    - match: ^\s*(#\s*(?:if|ifdef|ifndef))\b
+      captures:
+        1: keyword.control.import.c++
+      push:
+        - meta_scope: meta.preprocessor.c++
+        - include: scope:source.c#preprocessor-line-continuation
+        - include: scope:source.c#preprocessor-comments
+        - match: \bdefined\b
+          scope: keyword.control.c++
+        # Enter a new scope where all elif/else branches have their
+        # contexts popped by a subsequent elif/else/endif. This ensures that
+        # preprocessor branches don't push multiple meta.block scopes on
+        # the stack, thus messing up the "global" context's detection of
+        # functions.
+        - match: $\n
+          set: preprocessor-if-branch-global
+
+  # These gymnastics here ensure that we are properly handling scope even
+  # when the preprocessor is used to create different scope beginnings, such
+  # as a different if/while condition
+  preprocessor-if-branch-global:
+    - match: ^\s*(#\s*endif)\b
+      captures:
+        1: meta.preprocessor.c++ keyword.control.import.c++
+      pop: true
+    - match: (?=^\s*#\s*(elif|else)\b)
+      push: preprocessor-elif-else-branch-global
+    - match: \{
+      scope: punctuation.section.block.begin.c++
+      set: preprocessor-block-if-branch-global
+    - include: preprocessor-global
+    - include: negated-block
+    - include: global
+
+  preprocessor-block-if-branch-global:
+    - meta_scope: meta.block.c++
+    - match: ^\s*(#\s*endif)\b
+      captures:
+        1: meta.preprocessor.c++ keyword.control.import.c++
+      set: preprocessor-block-finish-global
+    - match: (?=^\s*#\s*(elif|else)\b)
+      push: preprocessor-elif-else-branch-global
+    - match: \}
+      scope: punctuation.section.block.end.c++
+      set: preprocessor-if-branch-global
+    - include: statements
+
+  preprocessor-block-finish-global:
+    - meta_scope: meta.block.c++
+    - match: ^\s*(#\s*(?:if|ifdef|ifndef))\b
+      captures:
+        1: meta.preprocessor.c++ keyword.control.import.c++
+      set: preprocessor-block-finish-if-branch-global
+    - match: \}
+      scope: punctuation.section.block.end.c++
+      pop: true
+    - include: statements
+
+  preprocessor-block-finish-if-branch-global:
+    - match: ^\s*(#\s*endif)\b
+      captures:
+        1: keyword.control.import.c++
+      pop: true
+    - match: \}
+      scope: punctuation.section.block.end.c++
+      set: preprocessor-if-branch-global
+    - include: statements
+
+  preprocessor-elif-else-branch-global:
+    - match: (?=^\s*#\s*(endif)\b)
+      pop: true
+    - include: preprocessor-global
+    - include: negated-block
+    - include: global
+
+  ## Preprocessor for statements
+
+  preprocessor-rule-disabled-statements:
+    - match: ^\s*((#if)\s+(0))\b
+      captures:
+        1: meta.preprocessor.c++
+        2: keyword.control.import.c++
+        3: constant.numeric.preprocessor.c++
+      push:
+        - match: ^\s*(#\s*endif)\b
+          captures:
+            1: meta.preprocessor.c++ keyword.control.import.c++
+          pop: true
+        - match: ^\s*(#\s*else)\b
+          captures:
+            1: meta.preprocessor.c++ keyword.control.import.else.c++
+          push:
+            - match: (?=^\s*#\s*endif\b)
+              pop: true
+            - include: negated-block
+            - include: statements
+        - match: ""
+          push:
+            - meta_scope: comment.block.preprocessor.if-branch.c++
+            - match: (?=^\s*#\s*(else|endif)\b)
+              pop: true
+            - include: scope:source.c#preprocessor-disabled
+
+  preprocessor-rule-enabled-statements:
+    - match: ^\s*((#if)\s+(0*1))\b
+      captures:
+        1: meta.preprocessor.c++
+        2: keyword.control.import.c++
+        3: constant.numeric.preprocessor.c++
+      push:
+        - match: ^\s*(#\s*endif)\b
+          captures:
+            1: meta.preprocessor.c++ keyword.control.import.c++
+          pop: true
+        - match: ^\s*(#\s*else)\b
+          captures:
+            1: meta.preprocessor.c++ keyword.control.import.else.c++
+          push:
+            - meta_content_scope: comment.block.preprocessor.else-branch.c++
+            - match: (?=^\s*#\s*endif\b)
+              pop: true
+            - include: scope:source.c#preprocessor-disabled
+        - match: ""
+          push:
+            - match: (?=^\s*#\s*(else|endif)\b)
+              pop: true
+            - include: negated-block
+            - include: statements
+
+  preprocessor-rule-other-statements:
+    - match: ^\s*(#\s*(?:if|ifdef|ifndef))\b
+      captures:
+        1: keyword.control.import.c++
+      push:
+        - meta_scope: meta.preprocessor.c++
+        - include: scope:source.c#preprocessor-line-continuation
+        - include: scope:source.c#preprocessor-comments
+        - match: \bdefined\b
+          scope: keyword.control.c++
+        # Enter a new scope where all elif/else branches have their
+        # contexts popped by a subsequent elif/else/endif. This ensures that
+        # preprocessor branches don't push multiple meta.block scopes on
+        # the stack, thus messing up the "global" context's detection of
+        # functions.
+        - match: $\n
+          set: preprocessor-if-branch-statements
+
+  # These gymnastics here ensure that we are properly handling scope even
+  # when the preprocessor is used to create different scope beginnings, such
+  # as a different if/while condition
+  preprocessor-if-branch-statements:
+    - match: ^\s*(#\s*endif)\b
+      captures:
+        1: meta.preprocessor.c++ keyword.control.import.c++
+      pop: true
+    - match: (?=^\s*#\s*(elif|else)\b)
+      push: preprocessor-elif-else-branch-statements
+    - match: \{
+      scope: punctuation.section.block.begin.c++
+      set: preprocessor-block-if-branch-statements
+    - match: (?=(?!{{non_func_keywords}}){{path_lookahead}}\s*\()
+      set: preprocessor-if-branch-function-call
+    - include: negated-block
+    - include: statements
+
+  preprocessor-if-branch-function-call:
+    - meta_content_scope: meta.function-call.c++
+    - include: scope:source.c#c99
+    - match: '(?:(::)\s*)?{{identifier}}\s*(::)\s*'
+      scope: variable.function.c++
+      captures:
+        1: punctuation.accessor.c++
+        2: punctuation.accessor.c++
+    - match: '(?:(::)\s*)?{{identifier}}'
+      scope: variable.function.c++
+      captures:
+        1: punctuation.accessor.c++
+    - match: '\('
+      scope: meta.group.c++ punctuation.section.group.begin.c++
+      set: preprocessor-if-branch-function-call-arguments
+
+  preprocessor-if-branch-function-call-arguments:
+    - meta_content_scope: meta.function-call.c++ meta.group.c++
+    - match : \)
+      scope: meta.function-call.c++ meta.group.c++ punctuation.section.group.end.c++
+      set: preprocessor-if-branch-statements
+    - match: ^\s*(#\s*(?:elif|else))\b
+      captures:
+        1: meta.preprocessor.c++ keyword.control.import.c++
+      set: preprocessor-if-branch-statements
+    - match: ^\s*(#\s*endif)\b
+      captures:
+        1: meta.preprocessor.c++ keyword.control.import.c++
+      set: preprocessor-if-branch-function-call-arguments-finish
+    - include: expressions
+
+  preprocessor-if-branch-function-call-arguments-finish:
+    - meta_content_scope: meta.function-call.c++ meta.group.c++
+    - match: \)
+      scope: meta.function-call.c++ meta.group.c++ punctuation.section.group.end.c++
+      pop: true
+    - include: expressions
+
+  preprocessor-block-if-branch-statements:
+    - meta_scope: meta.block.c++
+    - match: ^\s*(#\s*endif)\b
+      captures:
+        1: meta.preprocessor.c++ keyword.control.import.c++
+      set: preprocessor-block-finish-statements
+    - match: (?=^\s*#\s*(elif|else)\b)
+      push: preprocessor-elif-else-branch-statements
+    - match: \}
+      scope: punctuation.section.block.end.c++
+      set: preprocessor-if-branch-statements
+    - include: statements
+
+  preprocessor-block-finish-statements:
+    - meta_scope: meta.block.c++
+    - match: ^\s*(#\s*(?:if|ifdef|ifndef))\b
+      captures:
+        1: meta.preprocessor.c++ keyword.control.import.c++
+      set: preprocessor-block-finish-if-branch-statements
+    - match: \}
+      scope: punctuation.section.block.end.c++
+      pop: true
+    - include: statements
+
+  preprocessor-block-finish-if-branch-statements:
+    - match: ^\s*(#\s*endif)\b
+      captures:
+        1: keyword.control.import.c++
+      pop: true
+    - match: \}
+      scope: meta.block.c++ punctuation.section.block.end.c++
+      set: preprocessor-if-branch-statements
+    - include: statements
+
+  preprocessor-elif-else-branch-statements:
+    - match: (?=^\s*#\s*endif\b)
+      pop: true
+    - include: negated-block
+    - include: statements
+
+  ## Preprocessor other
+
+  negated-block:
+    - match: '\}'
+      scope: punctuation.section.block.end.c++
+      push:
+        - match: '\{'
+          scope: punctuation.section.block.begin.c++
+          pop: true
+        - match: (?=^\s*#\s*(elif|else|endif)\b)
+          pop: true
+        - include: statements
+
+  preprocessor-macro-define:
+    - match: ^\s*(\#\s*define)\b
+      captures:
+        1: meta.preprocessor.macro.c++ keyword.control.import.define.c++
+      push:
+        - meta_content_scope: meta.preprocessor.macro.c++
+        - include: scope:source.c#preprocessor-line-continuation
+        - include: scope:source.c#preprocessor-line-ending
+        - include: scope:source.c#preprocessor-comments
+        - match: '({{identifier}})(?=\()'
+          scope: entity.name.function.preprocessor.c++
+          set:
+            - match: '\('
+              scope: punctuation.section.group.begin.c++
+              set: preprocessor-macro-params
+        - match: '{{identifier}}'
+          scope: entity.name.constant.preprocessor.c++
+          set: preprocessor-macro-definition
+
+  preprocessor-macro-params:
+    - meta_scope: meta.preprocessor.macro.parameters.c++ meta.group.c++
+    - match: '{{identifier}}'
+      scope: variable.parameter.c++
+    - match: \)
+      scope: punctuation.section.group.end.c++
+      set: preprocessor-macro-definition
+    - match: ','
+      scope: punctuation.separator.c++
+      push:
+        - match: '{{identifier}}'
+          scope: variable.parameter.c++
+          pop: true
+        - include: scope:source.c#preprocessor-line-continuation
+        - include: scope:source.c#preprocessor-comments
+        - match: '\.\.\.'
+          scope: keyword.operator.variadic.c++
+        - match: '(?=\))'
+          pop: true
+        - match: (/\*).*(\*/)
+          scope: comment.block.c++
+          captures:
+            1: punctuation.definition.comment.c++
+            2: punctuation.definition.comment.c++
+        - match: '\S+'
+          scope: invalid.illegal.unexpected-character.c++
+    - include: scope:source.c#preprocessor-line-continuation
+    - include: scope:source.c#preprocessor-comments
+    - match: '\.\.\.'
+      scope: keyword.operator.variadic.c++
+    - match: (/\*).*(\*/)
+      scope: comment.block.c++
+      captures:
+        1: punctuation.definition.comment.c++
+        2: punctuation.definition.comment.c++
+    - match: $\n
+      scope: invalid.illegal.unexpected-end-of-line.c++
+
+  preprocessor-macro-definition:
+    - meta_content_scope: meta.preprocessor.macro.c++
+    - include: scope:source.c#preprocessor-line-continuation
+    - include: scope:source.c#preprocessor-line-ending
+    - include: scope:source.c#preprocessor-comments
+    # Don't define blocks in define statements
+    - match: '\{'
+      scope: punctuation.section.block.begin.c++
+    - match: '\}'
+      scope: punctuation.section.block.end.c++
+    - include: expressions
+
+  preprocessor-practical-workarounds:
+    - include: preprocessor-convention-ignore-uppercase-ident-lines
+    - include: scope:source.c#preprocessor-convention-ignore-uppercase-calls-without-semicolon
+
+  preprocessor-convention-ignore-uppercase-ident-lines:
+    - match: ^(\s*{{macro_identifier}})+\s*$
+      scope: meta.assumed-macro.c++
+      push:
+        # It's possible that we are dealing with a function return type on its own line, and the
+        # name of the function is on the subsequent line.
+        - match: '(?={{path_lookahead}}({{generic_lookahead}}({{path_lookahead}})?)\s*\()'
+          set: [function-definition-params, global-function-identifier-generic]
+        - match: '(?={{path_lookahead}}\s*\()'
+          set: [function-definition-params, global-function-identifier]
+        - match: ^
+          pop: true
+
+  preprocessor-other:
+    - match: ^\s*(#\s*(?:if|ifdef|ifndef|elif|else|line|pragma|undef))\b
+      captures:
+        1: keyword.control.import.c++
+      push:
+        - meta_scope: meta.preprocessor.c++
+        - include: scope:source.c#preprocessor-line-continuation
+        - include: scope:source.c#preprocessor-line-ending
+        - include: scope:source.c#preprocessor-comments
+        - match: \bdefined\b
+          scope: keyword.control.c++
+    - match: ^\s*(#\s*endif)\b
+      captures:
+        1: meta.preprocessor.c++ keyword.control.import.c++
+    - match: ^\s*(#\s*(?:error|warning))\b
+      captures:
+        1: keyword.control.import.error.c++
+      push:
+        - meta_scope: meta.preprocessor.diagnostic.c++
+        - include: scope:source.c#preprocessor-line-continuation
+        - include: scope:source.c#preprocessor-line-ending
+        - include: scope:source.c#preprocessor-comments
+        - include: strings
+        - match: '\S+'
+          scope: string.unquoted.c++
+    - match: ^\s*(#\s*(?:include|include_next|import))\b
+      captures:
+        1: keyword.control.import.include.c++
+      push:
+        - meta_scope: meta.preprocessor.include.c++
+        - include: scope:source.c#preprocessor-line-continuation
+        - include: scope:source.c#preprocessor-line-ending
+        - include: scope:source.c#preprocessor-comments
+        - match: '"'
+          scope: punctuation.definition.string.begin.c++
+          push:
+            - meta_scope: string.quoted.double.include.c++
+            - match: '"'
+              scope: punctuation.definition.string.end.c++
+              pop: true
+        - match: <
+          scope: punctuation.definition.string.begin.c++
+          push:
+            - meta_scope: string.quoted.other.lt-gt.include.c++
+            - match: '>'
+              scope: punctuation.definition.string.end.c++
+              pop: true
+    - include: preprocessor-practical-workarounds
diff --git a/3rdparty/fmt/support/README b/3rdparty/fmt/support/README
new file mode 100644
index 00000000..468f5485
--- /dev/null
+++ b/3rdparty/fmt/support/README
@@ -0,0 +1,4 @@
+This directory contains build support files such as
+
+* CMake modules
+* Build scripts
diff --git a/3rdparty/fmt/support/Vagrantfile b/3rdparty/fmt/support/Vagrantfile
new file mode 100644
index 00000000..f6b5f936
--- /dev/null
+++ b/3rdparty/fmt/support/Vagrantfile
@@ -0,0 +1,20 @@
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+# A vagrant config for testing against gcc-4.8.
+Vagrant.configure("2") do |config|
+  config.vm.box = "ubuntu/xenial64"
+  config.disksize.size = '15GB'
+
+  config.vm.provider "virtualbox" do |vb|
+    vb.memory = "4096"
+  end
+
+  config.vm.provision "shell", inline: <<-SHELL
+    apt-get update
+    apt-get install -y g++ make wget git
+    wget -q https://github.com/Kitware/CMake/releases/download/v3.14.4/cmake-3.14.4-Linux-x86_64.tar.gz
+    tar xzf cmake-3.14.4-Linux-x86_64.tar.gz
+    ln -s `pwd`/cmake-3.14.4-Linux-x86_64/bin/cmake /usr/local/bin
+  SHELL
+end
diff --git a/3rdparty/fmt/support/appveyor-build.py b/3rdparty/fmt/support/appveyor-build.py
new file mode 100644
index 00000000..65446103
--- /dev/null
+++ b/3rdparty/fmt/support/appveyor-build.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+# Build the project on AppVeyor.
+
+import os
+from subprocess import check_call
+
+build = os.environ['BUILD']
+config = os.environ['CONFIGURATION']
+platform = os.environ['PLATFORM']
+path = os.environ['PATH']
+image = os.environ['APPVEYOR_BUILD_WORKER_IMAGE']
+jobid = os.environ['APPVEYOR_JOB_ID']
+cmake_command = ['cmake', '-DFMT_PEDANTIC=ON', '-DCMAKE_BUILD_TYPE=' + config, '..']
+if build == 'mingw':
+    cmake_command.append('-GMinGW Makefiles')
+    build_command = ['mingw32-make', '-j4']
+    test_command = ['mingw32-make', 'test']
+    # Remove the path to Git bin directory from $PATH because it breaks
+    # MinGW config.
+    path = path.replace(r'C:\Program Files (x86)\Git\bin', '')
+    os.environ['PATH'] = r'C:\MinGW\bin;' + path
+else:
+    # Add MSBuild 14.0 to PATH as described in
+    # http://help.appveyor.com/discussions/problems/2229-v140-not-found-on-vs2105rc.
+    os.environ['PATH'] = r'C:\Program Files (x86)\MSBuild\15.0\Bin;' + path
+    if image == 'Visual Studio 2019':
+        generator = 'Visual Studio 16 2019'
+        if platform == 'x64':
+            cmake_command.extend(['-A', 'x64'])
+    else:
+        if image == 'Visual Studio 2015':
+            generator = 'Visual Studio 14 2015'
+        elif image == 'Visual Studio 2017':
+            generator = 'Visual Studio 15 2017'
+        if platform == 'x64':
+            generator += ' Win64'
+    cmake_command.append('-G' + generator)
+    build_command = ['cmake', '--build', '.', '--config', config, '--', '/m:4']
+    test_command = ['ctest', '-C', config]
+
+check_call(cmake_command)
+check_call(build_command)
+check_call(test_command)
diff --git a/3rdparty/fmt/support/appveyor.yml b/3rdparty/fmt/support/appveyor.yml
new file mode 100644
index 00000000..64ca58a9
--- /dev/null
+++ b/3rdparty/fmt/support/appveyor.yml
@@ -0,0 +1,31 @@
+configuration:
+  - Debug
+  - Release
+
+clone_depth: 1
+
+image:
+  - Visual Studio 2015
+
+platform:
+  - x64
+
+environment:
+  CTEST_OUTPUT_ON_FAILURE: 1
+  MSVC_DEFAULT_OPTIONS: ON
+  BUILD: msvc
+
+before_build:
+ - mkdir build
+ - cd build
+
+build_script:
+  - python ../support/appveyor-build.py
+
+on_failure:
+  - appveyor PushArtifact Testing/Temporary/LastTest.log
+  - appveyor AddTest test
+
+# Uncomment this to debug AppVeyor failures.
+#on_finish:
+#  - ps: $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
diff --git a/3rdparty/fmt/support/bazel/.bazelrc b/3rdparty/fmt/support/bazel/.bazelrc
new file mode 100644
index 00000000..583cbbd2
--- /dev/null
+++ b/3rdparty/fmt/support/bazel/.bazelrc
@@ -0,0 +1 @@
+build --symlink_prefix=/ # Out of source build
diff --git a/3rdparty/fmt/support/bazel/.bazelversion b/3rdparty/fmt/support/bazel/.bazelversion
new file mode 100644
index 00000000..fae6e3d0
--- /dev/null
+++ b/3rdparty/fmt/support/bazel/.bazelversion
@@ -0,0 +1 @@
+4.2.1
diff --git a/3rdparty/fmt/support/bazel/BUILD.bazel b/3rdparty/fmt/support/bazel/BUILD.bazel
new file mode 100644
index 00000000..3380bbca
--- /dev/null
+++ b/3rdparty/fmt/support/bazel/BUILD.bazel
@@ -0,0 +1,29 @@
+cc_library(
+    name = "fmt",
+    srcs = [
+        #"src/fmt.cc", # No C++ module support
+        "src/format.cc",
+        "src/os.cc",
+    ],
+    hdrs = [
+        "include/fmt/args.h",
+        "include/fmt/chrono.h",
+        "include/fmt/color.h",
+        "include/fmt/compile.h",
+        "include/fmt/core.h",
+        "include/fmt/format.h",
+        "include/fmt/format-inl.h",
+        "include/fmt/locale.h",
+        "include/fmt/os.h",
+        "include/fmt/ostream.h",
+        "include/fmt/printf.h",
+        "include/fmt/ranges.h",
+        "include/fmt/xchar.h",
+    ],
+    includes = [
+        "include",
+        "src",
+    ],
+    strip_include_prefix = "include",
+    visibility = ["//visibility:public"],
+)
diff --git a/3rdparty/fmt/support/bazel/README.md b/3rdparty/fmt/support/bazel/README.md
new file mode 100644
index 00000000..44af620c
--- /dev/null
+++ b/3rdparty/fmt/support/bazel/README.md
@@ -0,0 +1,73 @@
+# Bazel support
+
+To get [Bazel](https://bazel.build/) working with {fmt} you can copy the files `BUILD.bazel`, `WORKSPACE.bazel`, `.bazelrc`, and `.bazelversion` from this folder (`support/bazel`) to the root folder of this project. This way {fmt} gets bazelized and can be used with Bazel (e.g. doing a `bazel build //...` on {fmt}). 
+
+## Using {fmt} as a dependency
+
+The following minimal example shows how to use {fmt} as a dependency within a Bazel project.
+
+The following file structure is assumed:
+
+```
+example
+├── BUILD.bazel
+├── main.cpp
+└── WORKSPACE.bazel
+```
+
+*main.cpp*:
+
+```c++
+#include "fmt/core.h"
+
+int main() {
+  fmt::print("The answer is {}\n", 42);
+}
+```
+
+The expected output of this example is `The answer is 42`.
+
+*WORKSPACE.bazel*:
+
+```python
+load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
+
+git_repository(
+    name = "fmt",
+    branch = "master",
+    remote = "https://github.com/fmtlib/fmt",
+    patch_cmds = [
+        "mv support/bazel/.bazelrc .bazelrc",
+        "mv support/bazel/.bazelversion .bazelversion",
+        "mv support/bazel/BUILD.bazel BUILD.bazel",
+        "mv support/bazel/WORKSPACE.bazel WORKSPACE.bazel",
+    ],
+    # Windows-related patch commands are only needed in the case MSYS2 is not installed.
+    # More details about the installation process of MSYS2 on Windows systems can be found here:
+    # https://docs.bazel.build/versions/main/install-windows.html#installing-compilers-and-language-runtimes
+    # Even if MSYS2 is installed the Windows related patch commands can still be used.
+    patch_cmds_win = [
+        "Move-Item -Path support/bazel/.bazelrc -Destination .bazelrc",
+        "Move-Item -Path support/bazel/.bazelversion -Destination .bazelversion",
+        "Move-Item -Path support/bazel/BUILD.bazel -Destination BUILD.bazel",
+        "Move-Item -Path support/bazel/WORKSPACE.bazel -Destination WORKSPACE.bazel",
+    ],
+)
+```
+
+In the *WORKSPACE* file, the {fmt} GitHub repository is fetched. Using the attribute `patch_cmds` the  files `BUILD.bazel`, `WORKSPACE.bazel`, `.bazelrc`, and `.bazelversion` are moved to the root of the {fmt} repository. This way the {fmt} repository is recognized as a bazelized workspace. 
+
+*BUILD.bazel*:
+
+```python
+cc_binary(
+    name = "Demo",
+    srcs = ["main.cpp"],
+    deps = ["@fmt"],
+)
+```
+
+The *BUILD* file defines a binary named `Demo` that has a dependency to {fmt}.
+
+To execute the binary you can run `bazel run //:Demo`.
+
diff --git a/3rdparty/fmt/support/bazel/WORKSPACE.bazel b/3rdparty/fmt/support/bazel/WORKSPACE.bazel
new file mode 100644
index 00000000..5be77811
--- /dev/null
+++ b/3rdparty/fmt/support/bazel/WORKSPACE.bazel
@@ -0,0 +1 @@
+workspace(name = "fmt")
diff --git a/3rdparty/fmt/support/build-docs.py b/3rdparty/fmt/support/build-docs.py
new file mode 100644
index 00000000..f1395cd6
--- /dev/null
+++ b/3rdparty/fmt/support/build-docs.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+# Build the documentation in CI.
+
+from __future__ import print_function
+import errno, os, shutil, subprocess, sys, urllib
+from subprocess import call, check_call, Popen, PIPE, STDOUT
+
+def rmtree_if_exists(dir):
+    try:
+        shutil.rmtree(dir)
+    except OSError as e:
+        if e.errno == errno.ENOENT:
+            pass
+
+# Build the docs.
+fmt_dir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
+sys.path.insert(0, os.path.join(fmt_dir, 'doc'))
+import build
+build.create_build_env()
+html_dir = build.build_docs()
+
+repo = 'fmtlib.github.io'
+branch = os.environ['GITHUB_REF']
+is_ci = 'CI' in os.environ
+if is_ci and branch != 'refs/heads/master':
+    print('Branch: ' + branch)
+    exit(0) # Ignore non-master branches
+if is_ci and 'KEY' not in os.environ:
+    # Don't update the repo if building in CI from an account that doesn't have
+    # push access.
+    print('Skipping update of ' + repo)
+    exit(0)
+
+# Clone the fmtlib.github.io repo.
+rmtree_if_exists(repo)
+git_url = 'https://github.com/' if is_ci else 'git@github.com:'
+check_call(['git', 'clone', git_url + 'fmtlib/{}.git'.format(repo)])
+
+# Copy docs to the repo.
+target_dir = os.path.join(repo, 'dev')
+rmtree_if_exists(target_dir)
+shutil.copytree(html_dir, target_dir, ignore=shutil.ignore_patterns('.*'))
+if is_ci:
+    check_call(['git', 'config', '--global', 'user.name', 'fmtbot'])
+    check_call(['git', 'config', '--global', 'user.email', 'viz@fmt.dev'])
+
+# Push docs to GitHub pages.
+check_call(['git', 'add', '--all'], cwd=repo)
+if call(['git', 'diff-index', '--quiet', 'HEAD'], cwd=repo):
+    check_call(['git', 'commit', '-m', 'Update documentation'], cwd=repo)
+    cmd = 'git push'
+    if is_ci:
+        cmd += ' https://$KEY@github.com/fmtlib/fmtlib.github.io.git master'
+    p = Popen(cmd, shell=True, stdout=PIPE, stderr=STDOUT, cwd=repo)
+    # Print the output without the key.
+    print(p.communicate()[0].decode('utf-8').replace(os.environ['KEY'], '$KEY'))
+    if p.returncode != 0:
+        raise subprocess.CalledProcessError(p.returncode, cmd)
diff --git a/3rdparty/fmt/support/build.gradle b/3rdparty/fmt/support/build.gradle
new file mode 100644
index 00000000..8d18da6b
--- /dev/null
+++ b/3rdparty/fmt/support/build.gradle
@@ -0,0 +1,132 @@
+import java.nio.file.Paths
+
+// General gradle arguments for root project
+buildscript {    
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        //
+        // https://developer.android.com/studio/releases/gradle-plugin#updating-gradle
+        //
+        // Notice that 4.0.0 here is the version of [Android Gradle Plugin]
+        // Accroding to URL above you will need Gradle 6.1 or higher
+        //
+        classpath "com.android.tools.build:gradle:4.1.1"
+    }
+}
+repositories {
+    google()
+    jcenter()
+}
+
+// Project's root where CMakeLists.txt exists: rootDir/support/.cxx -> rootDir
+def rootDir = Paths.get(project.buildDir.getParent()).getParent()
+println("rootDir: ${rootDir}")
+
+// Output: Shared library (.so) for Android 
+apply plugin: "com.android.library"
+android {
+    compileSdkVersion 25    // Android 7.0
+
+    // Target ABI
+    //  - This option controls target platform of module
+    //  - The platform might be limited by compiler's support
+    //    some can work with Clang(default), but some can work only with GCC...
+    //    if bad, both toolchains might not support it
+    splits {
+        abi {
+            enable true
+            // Specify platforms for Application
+            reset()
+            include  "arm64-v8a", "armeabi-v7a", "x86_64"
+        }
+    }
+    ndkVersion "21.3.6528147" // ANDROID_NDK_HOME is deprecated. Be explicit
+
+    defaultConfig {
+        minSdkVersion 21    // Android 5.0+
+        targetSdkVersion 25 // Follow Compile SDK
+        versionCode 34      // Follow release count
+        versionName "7.1.2" // Follow Official version
+        
+        externalNativeBuild {
+            cmake {
+                arguments "-DANDROID_STL=c++_shared"    // Specify Android STL
+                arguments "-DBUILD_SHARED_LIBS=true"    // Build shared object
+                arguments "-DFMT_TEST=false"            // Skip test
+                arguments "-DFMT_DOC=false"             // Skip document
+                cppFlags  "-std=c++17"
+                targets   "fmt"
+            }
+        }
+        println(externalNativeBuild.cmake.cppFlags)
+        println(externalNativeBuild.cmake.arguments)
+    }
+
+    // External Native build
+    //  - Use existing CMakeList.txt
+    //  - Give path to CMake. This gradle file should be 
+    //    neighbor of the top level cmake
+    externalNativeBuild {
+        cmake {
+            version "3.10.0+"
+            path "${rootDir}/CMakeLists.txt"
+            // buildStagingDirectory "./build"  // Custom path for cmake output
+        }
+    }
+    
+    sourceSets{
+        // Android Manifest for Gradle
+        main {
+            manifest.srcFile "AndroidManifest.xml"
+        }
+    }
+
+    // https://developer.android.com/studio/build/native-dependencies#build_system_configuration
+    buildFeatures {
+        prefab true
+        prefabPublishing true
+    }
+    prefab {
+        fmt {
+            headers "${rootDir}/include"
+        }
+    }
+}
+
+assemble.doLast
+{
+    // Instead of `ninja install`, Gradle will deploy the files.
+    // We are doing this since FMT is dependent to the ANDROID_STL after build
+    copy {
+        from "build/intermediates/cmake"
+        into "${rootDir}/libs"
+    }
+    // Copy debug binaries
+    copy {
+        from "${rootDir}/libs/debug/obj"
+        into "${rootDir}/libs/debug"
+    }
+    // Copy Release binaries
+    copy {
+        from "${rootDir}/libs/release/obj"
+        into "${rootDir}/libs/release"
+    }
+    // Remove empty directory
+    delete "${rootDir}/libs/debug/obj"
+    delete "${rootDir}/libs/release/obj"
+
+    // Copy AAR files. Notice that the aar is named after the folder of this script.
+    copy {
+        from "build/outputs/aar/support-release.aar"
+        into "${rootDir}/libs"
+        rename "support-release.aar", "fmt-release.aar"
+    }
+    copy {
+        from "build/outputs/aar/support-debug.aar"
+        into "${rootDir}/libs"
+        rename "support-debug.aar", "fmt-debug.aar"
+    }
+}
diff --git a/3rdparty/fmt/support/cmake/FindSetEnv.cmake b/3rdparty/fmt/support/cmake/FindSetEnv.cmake
new file mode 100644
index 00000000..4e2da540
--- /dev/null
+++ b/3rdparty/fmt/support/cmake/FindSetEnv.cmake
@@ -0,0 +1,7 @@
+# A CMake script to find SetEnv.cmd.
+
+find_program(WINSDK_SETENV NAMES SetEnv.cmd
+  PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Microsoft SDKs\\Windows;CurrentInstallFolder]/bin")
+if (WINSDK_SETENV AND PRINT_PATH)
+  execute_process(COMMAND ${CMAKE_COMMAND} -E echo "${WINSDK_SETENV}")
+endif ()
diff --git a/3rdparty/fmt/support/cmake/JoinPaths.cmake b/3rdparty/fmt/support/cmake/JoinPaths.cmake
new file mode 100644
index 00000000..32d6d668
--- /dev/null
+++ b/3rdparty/fmt/support/cmake/JoinPaths.cmake
@@ -0,0 +1,26 @@
+# This module provides function for joining paths
+# known from from most languages
+#
+# Original license:
+# SPDX-License-Identifier: (MIT OR CC0-1.0)
+# Explicit permission given to distribute this module under
+# the terms of the project as described in /LICENSE.rst.
+# Copyright 2020 Jan Tojnar
+# https://github.com/jtojnar/cmake-snips
+#
+# Modelled after Python’s os.path.join
+# https://docs.python.org/3.7/library/os.path.html#os.path.join
+# Windows not supported
+function(join_paths joined_path first_path_segment)
+    set(temp_path "${first_path_segment}")
+    foreach(current_segment IN LISTS ARGN)
+        if(NOT ("${current_segment}" STREQUAL ""))
+            if(IS_ABSOLUTE "${current_segment}")
+                set(temp_path "${current_segment}")
+            else()
+                set(temp_path "${temp_path}/${current_segment}")
+            endif()
+        endif()
+    endforeach()
+    set(${joined_path} "${temp_path}" PARENT_SCOPE)
+endfunction()
diff --git a/3rdparty/fmt/support/cmake/cxx14.cmake b/3rdparty/fmt/support/cmake/cxx14.cmake
new file mode 100644
index 00000000..16ff5754
--- /dev/null
+++ b/3rdparty/fmt/support/cmake/cxx14.cmake
@@ -0,0 +1,70 @@
+# C++14 feature support detection
+
+include(CheckCXXSourceCompiles)
+include(CheckCXXCompilerFlag)
+
+if (NOT CMAKE_CXX_STANDARD)
+  set(CMAKE_CXX_STANDARD 11)
+endif()
+message(STATUS "CXX_STANDARD: ${CMAKE_CXX_STANDARD}")
+
+if (CMAKE_CXX_STANDARD EQUAL 20)
+  check_cxx_compiler_flag(-std=c++20 has_std_20_flag)
+  check_cxx_compiler_flag(-std=c++2a has_std_2a_flag)
+
+  if (has_std_20_flag)
+    set(CXX_STANDARD_FLAG -std=c++20)
+  elseif (has_std_2a_flag)
+    set(CXX_STANDARD_FLAG -std=c++2a)
+  endif ()
+elseif (CMAKE_CXX_STANDARD EQUAL 17)
+  check_cxx_compiler_flag(-std=c++17 has_std_17_flag)
+  check_cxx_compiler_flag(-std=c++1z has_std_1z_flag)
+
+  if (has_std_17_flag)
+    set(CXX_STANDARD_FLAG -std=c++17)
+  elseif (has_std_1z_flag)
+    set(CXX_STANDARD_FLAG -std=c++1z)
+  endif ()
+elseif (CMAKE_CXX_STANDARD EQUAL 14)
+  check_cxx_compiler_flag(-std=c++14 has_std_14_flag)
+  check_cxx_compiler_flag(-std=c++1y has_std_1y_flag)
+
+  if (has_std_14_flag)
+    set(CXX_STANDARD_FLAG -std=c++14)
+  elseif (has_std_1y_flag)
+    set(CXX_STANDARD_FLAG -std=c++1y)
+  endif ()
+elseif (CMAKE_CXX_STANDARD EQUAL 11)
+  check_cxx_compiler_flag(-std=c++11 has_std_11_flag)
+  check_cxx_compiler_flag(-std=c++0x has_std_0x_flag)
+
+  if (has_std_11_flag)
+    set(CXX_STANDARD_FLAG -std=c++11)
+  elseif (has_std_0x_flag)
+    set(CXX_STANDARD_FLAG -std=c++0x)
+  endif ()
+endif ()
+
+set(CMAKE_REQUIRED_FLAGS ${CXX_STANDARD_FLAG})
+
+# Check if user-defined literals are available
+check_cxx_source_compiles("
+  void operator\"\" _udl(long double);
+  int main() {}"
+  SUPPORTS_USER_DEFINED_LITERALS)
+if (NOT SUPPORTS_USER_DEFINED_LITERALS)
+  set (SUPPORTS_USER_DEFINED_LITERALS OFF)
+endif ()
+
+# Check if <variant> is available
+set(CMAKE_REQUIRED_FLAGS -std=c++1z)
+check_cxx_source_compiles("
+  #include <variant>
+  int main() {}"
+  FMT_HAS_VARIANT)
+if (NOT FMT_HAS_VARIANT)
+  set (FMT_HAS_VARIANT OFF)
+endif ()
+
+set(CMAKE_REQUIRED_FLAGS )
diff --git a/3rdparty/fmt/support/cmake/fmt-config.cmake.in b/3rdparty/fmt/support/cmake/fmt-config.cmake.in
new file mode 100644
index 00000000..71e30286
--- /dev/null
+++ b/3rdparty/fmt/support/cmake/fmt-config.cmake.in
@@ -0,0 +1,4 @@
+@PACKAGE_INIT@
+
+include(${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake)
+check_required_components(fmt)
diff --git a/3rdparty/fmt/support/cmake/fmt.pc.in b/3rdparty/fmt/support/cmake/fmt.pc.in
new file mode 100644
index 00000000..29976a8a
--- /dev/null
+++ b/3rdparty/fmt/support/cmake/fmt.pc.in
@@ -0,0 +1,11 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=@CMAKE_INSTALL_PREFIX@
+libdir=@libdir_for_pc_file@
+includedir=@includedir_for_pc_file@
+
+Name: fmt
+Description: A modern formatting library
+Version: @FMT_VERSION@
+Libs: -L${libdir} -l@FMT_LIB_NAME@
+Cflags: -I${includedir}
+
diff --git a/3rdparty/fmt/support/compute-powers.py b/3rdparty/fmt/support/compute-powers.py
new file mode 100644
index 00000000..601063d4
--- /dev/null
+++ b/3rdparty/fmt/support/compute-powers.py
@@ -0,0 +1,53 @@
+#!/usr/bin/env python
+# Compute 10 ** exp with exp in the range [min_exponent, max_exponent] and print
+# normalized (with most-significant bit equal to 1) significands in hexadecimal.
+
+from __future__ import print_function
+
+min_exponent = -348
+max_exponent = 340
+step = 8
+significand_size = 64
+exp_offset = 2000
+
+class fp:
+    pass
+
+powers = []
+for i, exp in enumerate(range(min_exponent, max_exponent + 1, step)):
+    result = fp()
+    n = 10 ** exp if exp >= 0 else 2 ** exp_offset / 10 ** -exp
+    k = significand_size + 1
+    # Convert to binary and round.
+    binary = '{:b}'.format(n)
+    result.f = (int('{:0<{}}'.format(binary[:k], k), 2) + 1) / 2
+    result.e = len(binary) - (exp_offset if exp < 0 else 0) - significand_size
+    powers.append(result)
+    # Sanity check.
+    exp_offset10 = 400
+    actual = result.f * 10 ** exp_offset10
+    if result.e > 0:
+        actual *= 2 ** result.e
+    else:
+        for j in range(-result.e):
+            actual /= 2
+    expected = 10 ** (exp_offset10 + exp)
+    precision = len('{}'.format(expected)) - len('{}'.format(actual - expected))
+    if precision < 19:
+        print('low precision:', precision)
+        exit(1)
+
+print('Significands:', end='')
+for i, fp in enumerate(powers):
+    if i % 3 == 0:
+        print(end='\n ')
+    print(' {:0<#16x}'.format(fp.f, ), end=',')
+
+print('\n\nExponents:', end='')
+for i, fp in enumerate(powers):
+    if i % 11 == 0:
+        print(end='\n ')
+    print(' {:5}'.format(fp.e), end=',')
+
+print('\n\nMax exponent difference:',
+      max([x.e - powers[i - 1].e for i, x in enumerate(powers)][1:]))
diff --git a/3rdparty/fmt/support/docopt.py b/3rdparty/fmt/support/docopt.py
new file mode 100644
index 00000000..2e43f7ce
--- /dev/null
+++ b/3rdparty/fmt/support/docopt.py
@@ -0,0 +1,581 @@
+"""Pythonic command-line interface parser that will make you smile.
+
+ * http://docopt.org
+ * Repository and issue-tracker: https://github.com/docopt/docopt
+ * Licensed under terms of MIT license (see LICENSE-MIT)
+ * Copyright (c) 2013 Vladimir Keleshev, vladimir@keleshev.com
+
+"""
+import sys
+import re
+
+
+__all__ = ['docopt']
+__version__ = '0.6.1'
+
+
+class DocoptLanguageError(Exception):
+
+    """Error in construction of usage-message by developer."""
+
+
+class DocoptExit(SystemExit):
+
+    """Exit in case user invoked program with incorrect arguments."""
+
+    usage = ''
+
+    def __init__(self, message=''):
+        SystemExit.__init__(self, (message + '\n' + self.usage).strip())
+
+
+class Pattern(object):
+
+    def __eq__(self, other):
+        return repr(self) == repr(other)
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def fix(self):
+        self.fix_identities()
+        self.fix_repeating_arguments()
+        return self
+
+    def fix_identities(self, uniq=None):
+        """Make pattern-tree tips point to same object if they are equal."""
+        if not hasattr(self, 'children'):
+            return self
+        uniq = list(set(self.flat())) if uniq is None else uniq
+        for i, child in enumerate(self.children):
+            if not hasattr(child, 'children'):
+                assert child in uniq
+                self.children[i] = uniq[uniq.index(child)]
+            else:
+                child.fix_identities(uniq)
+
+    def fix_repeating_arguments(self):
+        """Fix elements that should accumulate/increment values."""
+        either = [list(child.children) for child in transform(self).children]
+        for case in either:
+            for e in [child for child in case if case.count(child) > 1]:
+                if type(e) is Argument or type(e) is Option and e.argcount:
+                    if e.value is None:
+                        e.value = []
+                    elif type(e.value) is not list:
+                        e.value = e.value.split()
+                if type(e) is Command or type(e) is Option and e.argcount == 0:
+                    e.value = 0
+        return self
+
+
+def transform(pattern):
+    """Expand pattern into an (almost) equivalent one, but with single Either.
+
+    Example: ((-a | -b) (-c | -d)) => (-a -c | -a -d | -b -c | -b -d)
+    Quirks: [-a] => (-a), (-a...) => (-a -a)
+
+    """
+    result = []
+    groups = [[pattern]]
+    while groups:
+        children = groups.pop(0)
+        parents = [Required, Optional, OptionsShortcut, Either, OneOrMore]
+        if any(t in map(type, children) for t in parents):
+            child = [c for c in children if type(c) in parents][0]
+            children.remove(child)
+            if type(child) is Either:
+                for c in child.children:
+                    groups.append([c] + children)
+            elif type(child) is OneOrMore:
+                groups.append(child.children * 2 + children)
+            else:
+                groups.append(child.children + children)
+        else:
+            result.append(children)
+    return Either(*[Required(*e) for e in result])
+
+
+class LeafPattern(Pattern):
+
+    """Leaf/terminal node of a pattern tree."""
+
+    def __init__(self, name, value=None):
+        self.name, self.value = name, value
+
+    def __repr__(self):
+        return '%s(%r, %r)' % (self.__class__.__name__, self.name, self.value)
+
+    def flat(self, *types):
+        return [self] if not types or type(self) in types else []
+
+    def match(self, left, collected=None):
+        collected = [] if collected is None else collected
+        pos, match = self.single_match(left)
+        if match is None:
+            return False, left, collected
+        left_ = left[:pos] + left[pos + 1:]
+        same_name = [a for a in collected if a.name == self.name]
+        if type(self.value) in (int, list):
+            if type(self.value) is int:
+                increment = 1
+            else:
+                increment = ([match.value] if type(match.value) is str
+                             else match.value)
+            if not same_name:
+                match.value = increment
+                return True, left_, collected + [match]
+            same_name[0].value += increment
+            return True, left_, collected
+        return True, left_, collected + [match]
+
+
+class BranchPattern(Pattern):
+
+    """Branch/inner node of a pattern tree."""
+
+    def __init__(self, *children):
+        self.children = list(children)
+
+    def __repr__(self):
+        return '%s(%s)' % (self.__class__.__name__,
+                           ', '.join(repr(a) for a in self.children))
+
+    def flat(self, *types):
+        if type(self) in types:
+            return [self]
+        return sum([child.flat(*types) for child in self.children], [])
+
+
+class Argument(LeafPattern):
+
+    def single_match(self, left):
+        for n, pattern in enumerate(left):
+            if type(pattern) is Argument:
+                return n, Argument(self.name, pattern.value)
+        return None, None
+
+    @classmethod
+    def parse(class_, source):
+        name = re.findall('(<\S*?>)', source)[0]
+        value = re.findall('\[default: (.*)\]', source, flags=re.I)
+        return class_(name, value[0] if value else None)
+
+
+class Command(Argument):
+
+    def __init__(self, name, value=False):
+        self.name, self.value = name, value
+
+    def single_match(self, left):
+        for n, pattern in enumerate(left):
+            if type(pattern) is Argument:
+                if pattern.value == self.name:
+                    return n, Command(self.name, True)
+                else:
+                    break
+        return None, None
+
+
+class Option(LeafPattern):
+
+    def __init__(self, short=None, long=None, argcount=0, value=False):
+        assert argcount in (0, 1)
+        self.short, self.long, self.argcount = short, long, argcount
+        self.value = None if value is False and argcount else value
+
+    @classmethod
+    def parse(class_, option_description):
+        short, long, argcount, value = None, None, 0, False
+        options, _, description = option_description.strip().partition('  ')
+        options = options.replace(',', ' ').replace('=', ' ')
+        for s in options.split():
+            if s.startswith('--'):
+                long = s
+            elif s.startswith('-'):
+                short = s
+            else:
+                argcount = 1
+        if argcount:
+            matched = re.findall('\[default: (.*)\]', description, flags=re.I)
+            value = matched[0] if matched else None
+        return class_(short, long, argcount, value)
+
+    def single_match(self, left):
+        for n, pattern in enumerate(left):
+            if self.name == pattern.name:
+                return n, pattern
+        return None, None
+
+    @property
+    def name(self):
+        return self.long or self.short
+
+    def __repr__(self):
+        return 'Option(%r, %r, %r, %r)' % (self.short, self.long,
+                                           self.argcount, self.value)
+
+
+class Required(BranchPattern):
+
+    def match(self, left, collected=None):
+        collected = [] if collected is None else collected
+        l = left
+        c = collected
+        for pattern in self.children:
+            matched, l, c = pattern.match(l, c)
+            if not matched:
+                return False, left, collected
+        return True, l, c
+
+
+class Optional(BranchPattern):
+
+    def match(self, left, collected=None):
+        collected = [] if collected is None else collected
+        for pattern in self.children:
+            m, left, collected = pattern.match(left, collected)
+        return True, left, collected
+
+
+class OptionsShortcut(Optional):
+
+    """Marker/placeholder for [options] shortcut."""
+
+
+class OneOrMore(BranchPattern):
+
+    def match(self, left, collected=None):
+        assert len(self.children) == 1
+        collected = [] if collected is None else collected
+        l = left
+        c = collected
+        l_ = None
+        matched = True
+        times = 0
+        while matched:
+            # could it be that something didn't match but changed l or c?
+            matched, l, c = self.children[0].match(l, c)
+            times += 1 if matched else 0
+            if l_ == l:
+                break
+            l_ = l
+        if times >= 1:
+            return True, l, c
+        return False, left, collected
+
+
+class Either(BranchPattern):
+
+    def match(self, left, collected=None):
+        collected = [] if collected is None else collected
+        outcomes = []
+        for pattern in self.children:
+            matched, _, _ = outcome = pattern.match(left, collected)
+            if matched:
+                outcomes.append(outcome)
+        if outcomes:
+            return min(outcomes, key=lambda outcome: len(outcome[1]))
+        return False, left, collected
+
+
+class Tokens(list):
+
+    def __init__(self, source, error=DocoptExit):
+        self += source.split() if hasattr(source, 'split') else source
+        self.error = error
+
+    @staticmethod
+    def from_pattern(source):
+        source = re.sub(r'([\[\]\(\)\|]|\.\.\.)', r' \1 ', source)
+        source = [s for s in re.split('\s+|(\S*<.*?>)', source) if s]
+        return Tokens(source, error=DocoptLanguageError)
+
+    def move(self):
+        return self.pop(0) if len(self) else None
+
+    def current(self):
+        return self[0] if len(self) else None
+
+
+def parse_long(tokens, options):
+    """long ::= '--' chars [ ( ' ' | '=' ) chars ] ;"""
+    long, eq, value = tokens.move().partition('=')
+    assert long.startswith('--')
+    value = None if eq == value == '' else value
+    similar = [o for o in options if o.long == long]
+    if tokens.error is DocoptExit and similar == []:  # if no exact match
+        similar = [o for o in options if o.long and o.long.startswith(long)]
+    if len(similar) > 1:  # might be simply specified ambiguously 2+ times?
+        raise tokens.error('%s is not a unique prefix: %s?' %
+                           (long, ', '.join(o.long for o in similar)))
+    elif len(similar) < 1:
+        argcount = 1 if eq == '=' else 0
+        o = Option(None, long, argcount)
+        options.append(o)
+        if tokens.error is DocoptExit:
+            o = Option(None, long, argcount, value if argcount else True)
+    else:
+        o = Option(similar[0].short, similar[0].long,
+                   similar[0].argcount, similar[0].value)
+        if o.argcount == 0:
+            if value is not None:
+                raise tokens.error('%s must not have an argument' % o.long)
+        else:
+            if value is None:
+                if tokens.current() in [None, '--']:
+                    raise tokens.error('%s requires argument' % o.long)
+                value = tokens.move()
+        if tokens.error is DocoptExit:
+            o.value = value if value is not None else True
+    return [o]
+
+
+def parse_shorts(tokens, options):
+    """shorts ::= '-' ( chars )* [ [ ' ' ] chars ] ;"""
+    token = tokens.move()
+    assert token.startswith('-') and not token.startswith('--')
+    left = token.lstrip('-')
+    parsed = []
+    while left != '':
+        short, left = '-' + left[0], left[1:]
+        similar = [o for o in options if o.short == short]
+        if len(similar) > 1:
+            raise tokens.error('%s is specified ambiguously %d times' %
+                               (short, len(similar)))
+        elif len(similar) < 1:
+            o = Option(short, None, 0)
+            options.append(o)
+            if tokens.error is DocoptExit:
+                o = Option(short, None, 0, True)
+        else:  # why copying is necessary here?
+            o = Option(short, similar[0].long,
+                       similar[0].argcount, similar[0].value)
+            value = None
+            if o.argcount != 0:
+                if left == '':
+                    if tokens.current() in [None, '--']:
+                        raise tokens.error('%s requires argument' % short)
+                    value = tokens.move()
+                else:
+                    value = left
+                    left = ''
+            if tokens.error is DocoptExit:
+                o.value = value if value is not None else True
+        parsed.append(o)
+    return parsed
+
+
+def parse_pattern(source, options):
+    tokens = Tokens.from_pattern(source)
+    result = parse_expr(tokens, options)
+    if tokens.current() is not None:
+        raise tokens.error('unexpected ending: %r' % ' '.join(tokens))
+    return Required(*result)
+
+
+def parse_expr(tokens, options):
+    """expr ::= seq ( '|' seq )* ;"""
+    seq = parse_seq(tokens, options)
+    if tokens.current() != '|':
+        return seq
+    result = [Required(*seq)] if len(seq) > 1 else seq
+    while tokens.current() == '|':
+        tokens.move()
+        seq = parse_seq(tokens, options)
+        result += [Required(*seq)] if len(seq) > 1 else seq
+    return [Either(*result)] if len(result) > 1 else result
+
+
+def parse_seq(tokens, options):
+    """seq ::= ( atom [ '...' ] )* ;"""
+    result = []
+    while tokens.current() not in [None, ']', ')', '|']:
+        atom = parse_atom(tokens, options)
+        if tokens.current() == '...':
+            atom = [OneOrMore(*atom)]
+            tokens.move()
+        result += atom
+    return result
+
+
+def parse_atom(tokens, options):
+    """atom ::= '(' expr ')' | '[' expr ']' | 'options'
+             | long | shorts | argument | command ;
+    """
+    token = tokens.current()
+    result = []
+    if token in '([':
+        tokens.move()
+        matching, pattern = {'(': [')', Required], '[': [']', Optional]}[token]
+        result = pattern(*parse_expr(tokens, options))
+        if tokens.move() != matching:
+            raise tokens.error("unmatched '%s'" % token)
+        return [result]
+    elif token == 'options':
+        tokens.move()
+        return [OptionsShortcut()]
+    elif token.startswith('--') and token != '--':
+        return parse_long(tokens, options)
+    elif token.startswith('-') and token not in ('-', '--'):
+        return parse_shorts(tokens, options)
+    elif token.startswith('<') and token.endswith('>') or token.isupper():
+        return [Argument(tokens.move())]
+    else:
+        return [Command(tokens.move())]
+
+
+def parse_argv(tokens, options, options_first=False):
+    """Parse command-line argument vector.
+
+    If options_first:
+        argv ::= [ long | shorts ]* [ argument ]* [ '--' [ argument ]* ] ;
+    else:
+        argv ::= [ long | shorts | argument ]* [ '--' [ argument ]* ] ;
+
+    """
+    parsed = []
+    while tokens.current() is not None:
+        if tokens.current() == '--':
+            return parsed + [Argument(None, v) for v in tokens]
+        elif tokens.current().startswith('--'):
+            parsed += parse_long(tokens, options)
+        elif tokens.current().startswith('-') and tokens.current() != '-':
+            parsed += parse_shorts(tokens, options)
+        elif options_first:
+            return parsed + [Argument(None, v) for v in tokens]
+        else:
+            parsed.append(Argument(None, tokens.move()))
+    return parsed
+
+
+def parse_defaults(doc):
+    defaults = []
+    for s in parse_section('options:', doc):
+        # FIXME corner case "bla: options: --foo"
+        _, _, s = s.partition(':')  # get rid of "options:"
+        split = re.split('\n[ \t]*(-\S+?)', '\n' + s)[1:]
+        split = [s1 + s2 for s1, s2 in zip(split[::2], split[1::2])]
+        options = [Option.parse(s) for s in split if s.startswith('-')]
+        defaults += options
+    return defaults
+
+
+def parse_section(name, source):
+    pattern = re.compile('^([^\n]*' + name + '[^\n]*\n?(?:[ \t].*?(?:\n|$))*)',
+                         re.IGNORECASE | re.MULTILINE)
+    return [s.strip() for s in pattern.findall(source)]
+
+
+def formal_usage(section):
+    _, _, section = section.partition(':')  # drop "usage:"
+    pu = section.split()
+    return '( ' + ' '.join(') | (' if s == pu[0] else s for s in pu[1:]) + ' )'
+
+
+def extras(help, version, options, doc):
+    if help and any((o.name in ('-h', '--help')) and o.value for o in options):
+        print(doc.strip("\n"))
+        sys.exit()
+    if version and any(o.name == '--version' and o.value for o in options):
+        print(version)
+        sys.exit()
+
+
+class Dict(dict):
+    def __repr__(self):
+        return '{%s}' % ',\n '.join('%r: %r' % i for i in sorted(self.items()))
+
+
+def docopt(doc, argv=None, help=True, version=None, options_first=False):
+    """Parse `argv` based on command-line interface described in `doc`.
+
+    `docopt` creates your command-line interface based on its
+    description that you pass as `doc`. Such description can contain
+    --options, <positional-argument>, commands, which could be
+    [optional], (required), (mutually | exclusive) or repeated...
+
+    Parameters
+    ----------
+    doc : str
+        Description of your command-line interface.
+    argv : list of str, optional
+        Argument vector to be parsed. sys.argv[1:] is used if not
+        provided.
+    help : bool (default: True)
+        Set to False to disable automatic help on -h or --help
+        options.
+    version : any object
+        If passed, the object will be printed if --version is in
+        `argv`.
+    options_first : bool (default: False)
+        Set to True to require options precede positional arguments,
+        i.e. to forbid options and positional arguments intermix.
+
+    Returns
+    -------
+    args : dict
+        A dictionary, where keys are names of command-line elements
+        such as e.g. "--verbose" and "<path>", and values are the
+        parsed values of those elements.
+
+    Example
+    -------
+    >>> from docopt import docopt
+    >>> doc = '''
+    ... Usage:
+    ...     my_program tcp <host> <port> [--timeout=<seconds>]
+    ...     my_program serial <port> [--baud=<n>] [--timeout=<seconds>]
+    ...     my_program (-h | --help | --version)
+    ...
+    ... Options:
+    ...     -h, --help  Show this screen and exit.
+    ...     --baud=<n>  Baudrate [default: 9600]
+    ... '''
+    >>> argv = ['tcp', '127.0.0.1', '80', '--timeout', '30']
+    >>> docopt(doc, argv)
+    {'--baud': '9600',
+     '--help': False,
+     '--timeout': '30',
+     '--version': False,
+     '<host>': '127.0.0.1',
+     '<port>': '80',
+     'serial': False,
+     'tcp': True}
+
+    See also
+    --------
+    * For video introduction see http://docopt.org
+    * Full documentation is available in README.rst as well as online
+      at https://github.com/docopt/docopt#readme
+
+    """
+    argv = sys.argv[1:] if argv is None else argv
+
+    usage_sections = parse_section('usage:', doc)
+    if len(usage_sections) == 0:
+        raise DocoptLanguageError('"usage:" (case-insensitive) not found.')
+    if len(usage_sections) > 1:
+        raise DocoptLanguageError('More than one "usage:" (case-insensitive).')
+    DocoptExit.usage = usage_sections[0]
+
+    options = parse_defaults(doc)
+    pattern = parse_pattern(formal_usage(DocoptExit.usage), options)
+    # [default] syntax for argument is disabled
+    #for a in pattern.flat(Argument):
+    #    same_name = [d for d in arguments if d.name == a.name]
+    #    if same_name:
+    #        a.value = same_name[0].value
+    argv = parse_argv(Tokens(argv), list(options), options_first)
+    pattern_options = set(pattern.flat(Option))
+    for options_shortcut in pattern.flat(OptionsShortcut):
+        doc_options = parse_defaults(doc)
+        options_shortcut.children = list(set(doc_options) - pattern_options)
+        #if any_options:
+        #    options_shortcut.children += [Option(o.short, o.long, o.argcount)
+        #                    for o in argv if type(o) is Option]
+    extras(help, version, argv, doc)
+    matched, left, collected = pattern.fix().match(argv)
+    if matched and left == []:  # better error message if left?
+        return Dict((a.name, a.value) for a in (pattern.flat() + collected))
+    raise DocoptExit()
diff --git a/3rdparty/fmt/support/manage.py b/3rdparty/fmt/support/manage.py
new file mode 100644
index 00000000..bece4566
--- /dev/null
+++ b/3rdparty/fmt/support/manage.py
@@ -0,0 +1,297 @@
+#!/usr/bin/env python3
+
+"""Manage site and releases.
+
+Usage:
+  manage.py release [<branch>]
+  manage.py site
+
+For the release command $FMT_TOKEN should contain a GitHub personal access token
+obtained from https://github.com/settings/tokens.
+"""
+
+from __future__ import print_function
+import datetime, docopt, errno, fileinput, json, os
+import re, requests, shutil, sys, tempfile
+from contextlib import contextmanager
+from distutils.version import LooseVersion
+from subprocess import check_call
+
+
+class Git:
+    def __init__(self, dir):
+        self.dir = dir
+
+    def call(self, method, args, **kwargs):
+        return check_call(['git', method] + list(args), **kwargs)
+
+    def add(self, *args):
+        return self.call('add', args, cwd=self.dir)
+
+    def checkout(self, *args):
+        return self.call('checkout', args, cwd=self.dir)
+
+    def clean(self, *args):
+        return self.call('clean', args, cwd=self.dir)
+
+    def clone(self, *args):
+        return self.call('clone', list(args) + [self.dir])
+
+    def commit(self, *args):
+        return self.call('commit', args, cwd=self.dir)
+
+    def pull(self, *args):
+        return self.call('pull', args, cwd=self.dir)
+
+    def push(self, *args):
+        return self.call('push', args, cwd=self.dir)
+
+    def reset(self, *args):
+        return self.call('reset', args, cwd=self.dir)
+
+    def update(self, *args):
+        clone = not os.path.exists(self.dir)
+        if clone:
+            self.clone(*args)
+        return clone
+
+
+def clean_checkout(repo, branch):
+    repo.clean('-f', '-d')
+    repo.reset('--hard')
+    repo.checkout(branch)
+
+
+class Runner:
+    def __init__(self, cwd):
+        self.cwd = cwd
+
+    def __call__(self, *args, **kwargs):
+        kwargs['cwd'] = kwargs.get('cwd', self.cwd)
+        check_call(args, **kwargs)
+
+
+def create_build_env():
+    """Create a build environment."""
+    class Env:
+        pass
+    env = Env()
+
+    # Import the documentation build module.
+    env.fmt_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+    sys.path.insert(0, os.path.join(env.fmt_dir, 'doc'))
+    import build
+
+    env.build_dir = 'build'
+    env.versions = build.versions
+
+    # Virtualenv and repos are cached to speed up builds.
+    build.create_build_env(os.path.join(env.build_dir, 'virtualenv'))
+
+    env.fmt_repo = Git(os.path.join(env.build_dir, 'fmt'))
+    return env
+
+
+@contextmanager
+def rewrite(filename):
+    class Buffer:
+        pass
+    buffer = Buffer()
+    if not os.path.exists(filename):
+        buffer.data = ''
+        yield buffer
+        return
+    with open(filename) as f:
+        buffer.data = f.read()
+    yield buffer
+    with open(filename, 'w') as f:
+        f.write(buffer.data)
+
+
+fmt_repo_url = 'git@github.com:fmtlib/fmt'
+
+
+def update_site(env):
+    env.fmt_repo.update(fmt_repo_url)
+
+    doc_repo = Git(os.path.join(env.build_dir, 'fmtlib.github.io'))
+    doc_repo.update('git@github.com:fmtlib/fmtlib.github.io')
+
+    for version in env.versions:
+        clean_checkout(env.fmt_repo, version)
+        target_doc_dir = os.path.join(env.fmt_repo.dir, 'doc')
+        # Remove the old theme.
+        for entry in os.listdir(target_doc_dir):
+            path = os.path.join(target_doc_dir, entry)
+            if os.path.isdir(path):
+                shutil.rmtree(path)
+        # Copy the new theme.
+        for entry in ['_static', '_templates', 'basic-bootstrap', 'bootstrap',
+                      'conf.py', 'fmt.less']:
+            src = os.path.join(env.fmt_dir, 'doc', entry)
+            dst = os.path.join(target_doc_dir, entry)
+            copy = shutil.copytree if os.path.isdir(src) else shutil.copyfile
+            copy(src, dst)
+        # Rename index to contents.
+        contents = os.path.join(target_doc_dir, 'contents.rst')
+        if not os.path.exists(contents):
+            os.rename(os.path.join(target_doc_dir, 'index.rst'), contents)
+        # Fix issues in reference.rst/api.rst.
+        for filename in ['reference.rst', 'api.rst', 'index.rst']:
+            pattern = re.compile('doxygenfunction.. (bin|oct|hexu|hex)$', re.M)
+            with rewrite(os.path.join(target_doc_dir, filename)) as b:
+                b.data = b.data.replace('std::ostream &', 'std::ostream&')
+                b.data = re.sub(pattern, r'doxygenfunction:: \1(int)', b.data)
+                b.data = b.data.replace('std::FILE*', 'std::FILE *')
+                b.data = b.data.replace('unsigned int', 'unsigned')
+                #b.data = b.data.replace('operator""_', 'operator"" _')
+                b.data = b.data.replace(
+                    'format_to_n(OutputIt, size_t, string_view, Args&&',
+                    'format_to_n(OutputIt, size_t, const S&, const Args&')
+                b.data = b.data.replace(
+                    'format_to_n(OutputIt, std::size_t, string_view, Args&&',
+                    'format_to_n(OutputIt, std::size_t, const S&, const Args&')
+                if version == ('3.0.2'):
+                    b.data = b.data.replace(
+                        'fprintf(std::ostream&', 'fprintf(std::ostream &')
+                if version == ('5.3.0'):
+                    b.data = b.data.replace(
+                        'format_to(OutputIt, const S&, const Args&...)',
+                        'format_to(OutputIt, const S &, const Args &...)')
+                if version.startswith('5.') or version.startswith('6.'):
+                    b.data = b.data.replace(', size_t', ', std::size_t')
+                if version.startswith('7.'):
+                    b.data = b.data.replace(', std::size_t', ', size_t')
+                    b.data = b.data.replace('join(It, It', 'join(It, Sentinel')
+                if version.startswith('7.1.'):
+                    b.data = b.data.replace(', std::size_t', ', size_t')
+                    b.data = b.data.replace('join(It, It', 'join(It, Sentinel')
+                    b.data = b.data.replace(
+                        'fmt::format_to(OutputIt, const S&, Args&&...)',
+                        'fmt::format_to(OutputIt, const S&, Args&&...) -> ' +
+                        'typename std::enable_if<enable, OutputIt>::type')
+                b.data = b.data.replace('aa long', 'a long')
+                b.data = b.data.replace('serveral', 'several')
+                if version.startswith('6.2.'):
+                    b.data = b.data.replace(
+                        'vformat(const S&, basic_format_args<' +
+                        'buffer_context<Char>>)',
+                        'vformat(const S&, basic_format_args<' +
+                        'buffer_context<type_identity_t<Char>>>)')
+        # Fix a broken link in index.rst.
+        index = os.path.join(target_doc_dir, 'index.rst')
+        with rewrite(index) as b:
+            b.data = b.data.replace(
+                'doc/latest/index.html#format-string-syntax', 'syntax.html')
+        # Build the docs.
+        html_dir = os.path.join(env.build_dir, 'html')
+        if os.path.exists(html_dir):
+            shutil.rmtree(html_dir)
+        include_dir = env.fmt_repo.dir
+        if LooseVersion(version) >= LooseVersion('5.0.0'):
+            include_dir = os.path.join(include_dir, 'include', 'fmt')
+        elif LooseVersion(version) >= LooseVersion('3.0.0'):
+            include_dir = os.path.join(include_dir, 'fmt')
+        import build
+        build.build_docs(version, doc_dir=target_doc_dir,
+                         include_dir=include_dir, work_dir=env.build_dir)
+        shutil.rmtree(os.path.join(html_dir, '.doctrees'))
+        # Create symlinks for older versions.
+        for link, target in {'index': 'contents', 'api': 'reference'}.items():
+            link = os.path.join(html_dir, link) + '.html'
+            target += '.html'
+            if os.path.exists(os.path.join(html_dir, target)) and \
+               not os.path.exists(link):
+                os.symlink(target, link)
+        # Copy docs to the website.
+        version_doc_dir = os.path.join(doc_repo.dir, version)
+        try:
+            shutil.rmtree(version_doc_dir)
+        except OSError as e:
+            if e.errno != errno.ENOENT:
+                raise
+        shutil.move(html_dir, version_doc_dir)
+
+
+def release(args):
+    env = create_build_env()
+    fmt_repo = env.fmt_repo
+
+    branch = args.get('<branch>')
+    if branch is None:
+        branch = 'master'
+    if not fmt_repo.update('-b', branch, fmt_repo_url):
+        clean_checkout(fmt_repo, branch)
+
+    # Convert changelog from RST to GitHub-flavored Markdown and get the
+    # version.
+    changelog = 'ChangeLog.rst'
+    changelog_path = os.path.join(fmt_repo.dir, changelog)
+    import rst2md
+    changes, version = rst2md.convert(changelog_path)
+    cmakelists = 'CMakeLists.txt'
+    for line in fileinput.input(os.path.join(fmt_repo.dir, cmakelists),
+                                inplace=True):
+        prefix = 'set(FMT_VERSION '
+        if line.startswith(prefix):
+            line = prefix + version + ')\n'
+        sys.stdout.write(line)
+
+    # Update the version in the changelog.
+    title_len = 0
+    for line in fileinput.input(changelog_path, inplace=True):
+        if line.startswith(version + ' - TBD'):
+            line = version + ' - ' + datetime.date.today().isoformat()
+            title_len = len(line)
+            line += '\n'
+        elif title_len:
+            line = '-' * title_len + '\n'
+            title_len = 0
+        sys.stdout.write(line)
+
+    # Add the version to the build script.
+    script = os.path.join('doc', 'build.py')
+    script_path = os.path.join(fmt_repo.dir, script)
+    for line in fileinput.input(script_path, inplace=True):
+      m = re.match(r'( *versions = )\[(.+)\]', line)
+      if m:
+        line = '{}[{}, \'{}\']\n'.format(m.group(1), m.group(2), version)
+      sys.stdout.write(line)
+
+    fmt_repo.checkout('-B', 'release')
+    fmt_repo.add(changelog, cmakelists, script)
+    fmt_repo.commit('-m', 'Update version')
+
+    # Build the docs and package.
+    run = Runner(fmt_repo.dir)
+    run('cmake', '.')
+    run('make', 'doc', 'package_source')
+    update_site(env)
+
+    # Create a release on GitHub.
+    fmt_repo.push('origin', 'release')
+    auth_headers = {'Authorization': 'token ' + os.getenv('FMT_TOKEN')}
+    r = requests.post('https://api.github.com/repos/fmtlib/fmt/releases',
+                      headers=auth_headers,
+                      data=json.dumps({'tag_name': version,
+                                       'target_commitish': 'release',
+                                       'body': changes, 'draft': True}))
+    if r.status_code != 201:
+        raise Exception('Failed to create a release ' + str(r))
+    id = r.json()['id']
+    uploads_url = 'https://uploads.github.com/repos/fmtlib/fmt/releases'
+    package = 'fmt-{}.zip'.format(version)
+    r = requests.post(
+        '{}/{}/assets?name={}'.format(uploads_url, id, package),
+        headers={'Content-Type': 'application/zip'} | auth_headers,
+        data=open('build/fmt/' + package, 'rb'))
+    if r.status_code != 201:
+        raise Exception('Failed to upload an asset ' + str(r))
+
+
+if __name__ == '__main__':
+    args = docopt.docopt(__doc__)
+    if args.get('release'):
+        release(args)
+    elif args.get('site'):
+        update_site(create_build_env())
diff --git a/3rdparty/fmt/support/printable.py b/3rdparty/fmt/support/printable.py
new file mode 100644
index 00000000..7d23d3bb
--- /dev/null
+++ b/3rdparty/fmt/support/printable.py
@@ -0,0 +1,201 @@
+#!/usr/bin/env python3
+
+# This script is based on
+# https://github.com/rust-lang/rust/blob/master/library/core/src/unicode/printable.py
+# distributed under https://github.com/rust-lang/rust/blob/master/LICENSE-MIT.
+
+# This script uses the following Unicode tables:
+# - UnicodeData.txt
+
+
+from collections import namedtuple
+import csv
+import os
+import subprocess
+
+NUM_CODEPOINTS=0x110000
+
+def to_ranges(iter):
+    current = None
+    for i in iter:
+        if current is None or i != current[1] or i in (0x10000, 0x20000):
+            if current is not None:
+                yield tuple(current)
+            current = [i, i + 1]
+        else:
+            current[1] += 1
+    if current is not None:
+        yield tuple(current)
+
+def get_escaped(codepoints):
+    for c in codepoints:
+        if (c.class_ or "Cn") in "Cc Cf Cs Co Cn Zl Zp Zs".split() and c.value != ord(' '):
+            yield c.value
+
+def get_file(f):
+    try:
+        return open(os.path.basename(f))
+    except FileNotFoundError:
+        subprocess.run(["curl", "-O", f], check=True)
+        return open(os.path.basename(f))
+
+Codepoint = namedtuple('Codepoint', 'value class_')
+
+def get_codepoints(f):
+    r = csv.reader(f, delimiter=";")
+    prev_codepoint = 0
+    class_first = None
+    for row in r:
+        codepoint = int(row[0], 16)
+        name = row[1]
+        class_ = row[2]
+
+        if class_first is not None:
+            if not name.endswith("Last>"):
+                raise ValueError("Missing Last after First")
+
+        for c in range(prev_codepoint + 1, codepoint):
+            yield Codepoint(c, class_first)
+
+        class_first = None
+        if name.endswith("First>"):
+            class_first = class_
+
+        yield Codepoint(codepoint, class_)
+        prev_codepoint = codepoint
+
+    if class_first is not None:
+        raise ValueError("Missing Last after First")
+
+    for c in range(prev_codepoint + 1, NUM_CODEPOINTS):
+        yield Codepoint(c, None)
+
+def compress_singletons(singletons):
+    uppers = [] # (upper, # items in lowers)
+    lowers = []
+
+    for i in singletons:
+        upper = i >> 8
+        lower = i & 0xff
+        if len(uppers) == 0 or uppers[-1][0] != upper:
+            uppers.append((upper, 1))
+        else:
+            upper, count = uppers[-1]
+            uppers[-1] = upper, count + 1
+        lowers.append(lower)
+
+    return uppers, lowers
+
+def compress_normal(normal):
+    # lengths 0x00..0x7f are encoded as 00, 01, ..., 7e, 7f
+    # lengths 0x80..0x7fff are encoded as 80 80, 80 81, ..., ff fe, ff ff
+    compressed = [] # [truelen, (truelenaux), falselen, (falselenaux)]
+
+    prev_start = 0
+    for start, count in normal:
+        truelen = start - prev_start
+        falselen = count
+        prev_start = start + count
+
+        assert truelen < 0x8000 and falselen < 0x8000
+        entry = []
+        if truelen > 0x7f:
+            entry.append(0x80 | (truelen >> 8))
+            entry.append(truelen & 0xff)
+        else:
+            entry.append(truelen & 0x7f)
+        if falselen > 0x7f:
+            entry.append(0x80 | (falselen >> 8))
+            entry.append(falselen & 0xff)
+        else:
+            entry.append(falselen & 0x7f)
+
+        compressed.append(entry)
+
+    return compressed
+
+def print_singletons(uppers, lowers, uppersname, lowersname):
+    print("  static constexpr singleton {}[] = {{".format(uppersname))
+    for u, c in uppers:
+        print("    {{{:#04x}, {}}},".format(u, c))
+    print("  };")
+    print("  static constexpr unsigned char {}[] = {{".format(lowersname))
+    for i in range(0, len(lowers), 8):
+        print("    {}".format(" ".join("{:#04x},".format(l) for l in lowers[i:i+8])))
+    print("  };")
+
+def print_normal(normal, normalname):
+    print("  static constexpr unsigned char {}[] = {{".format(normalname))
+    for v in normal:
+        print("    {}".format(" ".join("{:#04x},".format(i) for i in v)))
+    print("  };")
+
+def main():
+    file = get_file("https://www.unicode.org/Public/UNIDATA/UnicodeData.txt")
+
+    codepoints = get_codepoints(file)
+
+    CUTOFF=0x10000
+    singletons0 = []
+    singletons1 = []
+    normal0 = []
+    normal1 = []
+    extra = []
+
+    for a, b in to_ranges(get_escaped(codepoints)):
+        if a > 2 * CUTOFF:
+            extra.append((a, b - a))
+        elif a == b - 1:
+            if a & CUTOFF:
+                singletons1.append(a & ~CUTOFF)
+            else:
+                singletons0.append(a)
+        elif a == b - 2:
+            if a & CUTOFF:
+                singletons1.append(a & ~CUTOFF)
+                singletons1.append((a + 1) & ~CUTOFF)
+            else:
+                singletons0.append(a)
+                singletons0.append(a + 1)
+        else:
+            if a >= 2 * CUTOFF:
+                extra.append((a, b - a))
+            elif a & CUTOFF:
+                normal1.append((a & ~CUTOFF, b - a))
+            else:
+                normal0.append((a, b - a))
+
+    singletons0u, singletons0l = compress_singletons(singletons0)
+    singletons1u, singletons1l = compress_singletons(singletons1)
+    normal0 = compress_normal(normal0)
+    normal1 = compress_normal(normal1)
+
+    print("""\
+inline auto is_printable(uint32_t cp) -> bool {\
+""")
+    print_singletons(singletons0u, singletons0l, 'singletons0', 'singletons0_lower')
+    print_singletons(singletons1u, singletons1l, 'singletons1', 'singletons1_lower')
+    print_normal(normal0, 'normal0')
+    print_normal(normal1, 'normal1')
+    print("""\
+  auto lower = static_cast<uint16_t>(cp);
+  if (cp < 0x10000) {
+    return is_printable(lower, singletons0,
+                        sizeof(singletons0) / sizeof(*singletons0),
+                        singletons0_lower, normal0, sizeof(normal0));
+  }
+  if (cp < 0x20000) {
+    return is_printable(lower, singletons1,
+                        sizeof(singletons1) / sizeof(*singletons1),
+                        singletons1_lower, normal1, sizeof(normal1));
+  }\
+""")
+    for a, b in extra:
+        print("  if (0x{:x} <= cp && cp < 0x{:x}) return false;".format(a, a + b))
+    print("""\
+  return cp < 0x{:x};
+}}\
+""".format(NUM_CODEPOINTS))
+
+if __name__ == '__main__':
+    main()
diff --git a/3rdparty/fmt/support/rst2md.py b/3rdparty/fmt/support/rst2md.py
new file mode 100644
index 00000000..3f072007
--- /dev/null
+++ b/3rdparty/fmt/support/rst2md.py
@@ -0,0 +1,159 @@
+#!/usr/bin/env python
+# reStructuredText (RST) to GitHub-flavored Markdown converter
+
+import re, sys
+from docutils import core, nodes, writers
+
+
+def is_github_ref(node):
+    return re.match('https://github.com/.*/(issues|pull)/.*', node['refuri'])
+
+
+class Translator(nodes.NodeVisitor):
+    def __init__(self, document):
+        nodes.NodeVisitor.__init__(self, document)
+        self.output = ''
+        self.indent = 0
+        self.preserve_newlines = False
+
+    def write(self, text):
+        self.output += text.replace('\n', '\n' + ' ' * self.indent)
+
+    def visit_document(self, node):
+        pass
+
+    def depart_document(self, node):
+        pass
+
+    def visit_section(self, node):
+        pass
+
+    def depart_section(self, node):
+        # Skip all sections except the first one.
+        raise nodes.StopTraversal
+
+    def visit_title(self, node):
+        self.version = re.match(r'(\d+\.\d+\.\d+).*', node.children[0]).group(1)
+        raise nodes.SkipChildren
+
+    def visit_title_reference(self, node):
+        raise Exception(node)
+
+    def depart_title(self, node):
+        pass
+
+    def visit_Text(self, node):
+        if not self.preserve_newlines:
+            node = node.replace('\n', ' ')
+        self.write(node)
+
+    def depart_Text(self, node):
+        pass
+
+    def visit_bullet_list(self, node):
+        pass
+
+    def depart_bullet_list(self, node):
+        pass
+
+    def visit_list_item(self, node):
+        self.write('* ')
+        self.indent += 2
+
+    def depart_list_item(self, node):
+        self.indent -= 2
+        self.write('\n\n')
+
+    def visit_paragraph(self, node):
+        self.write('\n\n')
+
+    def depart_paragraph(self, node):
+        pass
+
+    def visit_reference(self, node):
+        if not is_github_ref(node):
+            self.write('[')
+
+    def depart_reference(self, node):
+        if not is_github_ref(node):
+            self.write('](' + node['refuri'] + ')')
+
+    def visit_target(self, node):
+        pass
+
+    def depart_target(self, node):
+        pass
+
+    def visit_literal(self, node):
+        self.write('`')
+
+    def depart_literal(self, node):
+        self.write('`')
+
+    def visit_literal_block(self, node):
+        self.write('\n\n```')
+        if 'c++' in node['classes']:
+            self.write('c++')
+        self.write('\n')
+        self.preserve_newlines = True
+
+    def depart_literal_block(self, node):
+        self.write('\n```\n')
+        self.preserve_newlines = False
+
+    def visit_inline(self, node):
+        pass
+
+    def depart_inline(self, node):
+        pass
+
+    def visit_image(self, node):
+        self.write('![](' + node['uri'] + ')')
+
+    def depart_image(self, node):
+        pass
+
+    def write_row(self, row, widths):
+        for i, entry in enumerate(row):
+            text = entry[0][0] if len(entry) > 0 else ''
+            if i != 0:
+                self.write('|')
+            self.write('{:{}}'.format(text, widths[i]))
+        self.write('\n')
+
+    def visit_table(self, node):
+        table = node.children[0]
+        colspecs = table[:-2]
+        thead = table[-2]
+        tbody = table[-1]
+        widths = [int(cs['colwidth']) for cs in colspecs]
+        sep = '|'.join(['-' * w for w in widths]) + '\n'
+        self.write('\n\n')
+        self.write_row(thead[0], widths)
+        self.write(sep)
+        for row in tbody:
+            self.write_row(row, widths)
+        raise nodes.SkipChildren
+
+    def depart_table(self, node):
+        pass
+
+class MDWriter(writers.Writer):
+    """GitHub-flavored markdown writer"""
+
+    supported = ('md',)
+    """Formats this writer supports."""
+
+    def translate(self):
+        translator = Translator(self.document)
+        self.document.walkabout(translator)
+        self.output = (translator.output, translator.version)
+
+
+def convert(rst_path):
+    """Converts RST file to Markdown."""
+    return core.publish_file(source_path=rst_path, writer=MDWriter())
+
+
+if __name__ == '__main__':
+    convert(sys.argv[1])
diff --git a/3rdparty/fmt/support/rtd/conf.py b/3rdparty/fmt/support/rtd/conf.py
new file mode 100644
index 00000000..124fb9d4
--- /dev/null
+++ b/3rdparty/fmt/support/rtd/conf.py
@@ -0,0 +1,7 @@
+# Sphinx configuration for readthedocs.
+
+import os, sys
+
+master_doc = 'index'
+html_theme = 'theme'
+html_theme_path = ["."]
diff --git a/3rdparty/fmt/support/rtd/index.rst b/3rdparty/fmt/support/rtd/index.rst
new file mode 100644
index 00000000..7c88322f
--- /dev/null
+++ b/3rdparty/fmt/support/rtd/index.rst
@@ -0,0 +1,2 @@
+If you are not redirected automatically, follow the
+`link to the fmt documentation <https://fmt.dev/latest/>`_.
diff --git a/3rdparty/fmt/support/rtd/theme/layout.html b/3rdparty/fmt/support/rtd/theme/layout.html
new file mode 100644
index 00000000..29ebc55b
--- /dev/null
+++ b/3rdparty/fmt/support/rtd/theme/layout.html
@@ -0,0 +1,17 @@
+{% extends "basic/layout.html" %}
+
+{% block extrahead %}
+<meta charset="UTF-8">
+<meta http-equiv="refresh" content="1;url=https://fmt.dev/latest/">
+<script type="text/javascript">
+    window.location.href = "https://fmt.dev/latest/"
+</script>
+<title>Page Redirection</title>
+{% endblock %}
+
+{% block document %}
+If you are not redirected automatically, follow the <a href='https://fmt.dev/latest/'>link to the fmt documentation</a>.
+{% endblock %}
+
+{% block footer %}
+{% endblock %}
diff --git a/3rdparty/fmt/support/rtd/theme/theme.conf b/3rdparty/fmt/support/rtd/theme/theme.conf
new file mode 100644
index 00000000..89e03bbd
--- /dev/null
+++ b/3rdparty/fmt/support/rtd/theme/theme.conf
@@ -0,0 +1,2 @@
+[theme]
+inherit = basic
diff --git a/3rdparty/fmt/test/CMakeLists.txt b/3rdparty/fmt/test/CMakeLists.txt
new file mode 100644
index 00000000..7ed8d5f7
--- /dev/null
+++ b/3rdparty/fmt/test/CMakeLists.txt
@@ -0,0 +1,244 @@
+add_subdirectory(gtest)
+
+set(TEST_MAIN_SRC test-main.cc gtest-extra.cc gtest-extra.h util.cc)
+add_library(test-main STATIC ${TEST_MAIN_SRC})
+target_include_directories(test-main PUBLIC
+  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>)
+target_link_libraries(test-main gtest)
+
+include(CheckCXXCompilerFlag)
+
+function(add_fmt_executable name)
+  add_executable(${name} ${ARGN})
+  if (MINGW)
+    target_link_libraries(${name} -static-libgcc -static-libstdc++)
+  endif ()
+  # (Wstringop-overflow) - [meta-bug] bogus/missing -Wstringop-overflow warnings
+  #   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88443
+  # Bogus -Wstringop-overflow warning
+  #   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100395
+  # [10 Regression] spurious -Wstringop-overflow writing to a trailing array plus offset
+  #   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95353
+  if (CMAKE_CXX_COMPILER_ID MATCHES "GNU" AND
+      NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0)
+    target_link_libraries(${name} -Wno-stringop-overflow)
+  endif ()
+endfunction()
+
+# Adds a test.
+# Usage: add_fmt_test(name srcs...)
+function(add_fmt_test name)
+  cmake_parse_arguments(ADD_FMT_TEST "HEADER_ONLY;MODULE" "" "" ${ARGN})
+
+  set(sources ${name}.cc ${ADD_FMT_TEST_UNPARSED_ARGUMENTS})
+  if (ADD_FMT_TEST_HEADER_ONLY)
+    set(sources ${sources} ${TEST_MAIN_SRC} ../src/os.cc)
+    set(libs gtest fmt-header-only)
+    if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+      set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wno-weak-vtables)
+    endif ()
+  elseif (ADD_FMT_TEST_MODULE)
+    set(libs gtest test-module)
+    set_source_files_properties(${name}.cc PROPERTIES OBJECT_DEPENDS test-module)
+  else ()
+    set(libs test-main fmt)
+  endif ()
+  add_fmt_executable(${name} ${sources})
+  target_link_libraries(${name} ${libs})
+
+  # Define if certain C++ features can be used.
+  if (FMT_PEDANTIC)
+    target_compile_options(${name} PRIVATE ${PEDANTIC_COMPILE_FLAGS})
+  endif ()
+  if (FMT_WERROR)
+    target_compile_options(${name} PRIVATE ${WERROR_FLAG})
+  endif ()
+  add_test(NAME ${name} COMMAND ${name})
+endfunction()
+
+add_fmt_test(args-test)
+add_fmt_test(assert-test)
+add_fmt_test(chrono-test)
+add_fmt_test(color-test)
+add_fmt_test(core-test)
+add_fmt_test(gtest-extra-test)
+add_fmt_test(format-test mock-allocator.h)
+if (MSVC)
+  target_compile_options(format-test PRIVATE /bigobj)
+endif ()
+if (NOT (MSVC AND BUILD_SHARED_LIBS))
+  add_fmt_test(format-impl-test HEADER_ONLY header-only-test.cc)
+endif ()
+add_fmt_test(ostream-test)
+add_fmt_test(compile-test)
+add_fmt_test(compile-fp-test HEADER_ONLY)
+if (MSVC)
+  # Without this option, MSVC returns 199711L for the __cplusplus macro.
+  target_compile_options(compile-fp-test PRIVATE /Zc:__cplusplus)
+endif()
+add_fmt_test(printf-test)
+add_fmt_test(ranges-test ranges-odr-test.cc)
+add_fmt_test(scan-test)
+add_fmt_test(unicode-test HEADER_ONLY)
+if (MSVC)
+  target_compile_options(unicode-test PRIVATE /utf-8)
+endif ()
+add_fmt_test(xchar-test)
+add_fmt_test(enforce-checks-test)
+target_compile_definitions(enforce-checks-test PRIVATE
+                           -DFMT_ENFORCE_COMPILE_STRING)
+
+if (FMT_CAN_MODULE)
+  # The tests need {fmt} to be compiled as traditional library
+  # because of visibility of implementation details.
+  # If module support is present the module tests require a
+  # test-only module to be built from {fmt}
+  add_library(test-module OBJECT ${CMAKE_SOURCE_DIR}/src/fmt.cc)
+  target_compile_features(test-module PUBLIC ${FMT_REQUIRED_FEATURES})
+  target_include_directories(test-module PUBLIC
+    $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>)
+  enable_module(test-module)
+
+  add_fmt_test(module-test MODULE test-main.cc)
+  if (MSVC)
+    target_compile_options(test-module PRIVATE /utf-8 /Zc:__cplusplus
+                           /Zc:externConstexpr /Zc:inline)
+    target_compile_options(module-test PRIVATE /utf-8 /Zc:__cplusplus
+                           /Zc:externConstexpr /Zc:inline)
+  endif ()
+endif ()
+
+if (NOT DEFINED MSVC_STATIC_RUNTIME AND MSVC)
+  foreach (flag_var
+			 CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
+			 CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
+	if (${flag_var} MATCHES "^(/|-)(MT|MTd)")
+	  set(MSVC_STATIC_RUNTIME ON)
+	  break()
+	endif()
+  endforeach()
+endif()
+
+if (NOT MSVC_STATIC_RUNTIME)
+  add_fmt_executable(posix-mock-test
+    posix-mock-test.cc ../src/format.cc ${TEST_MAIN_SRC})
+  target_include_directories(
+    posix-mock-test PRIVATE ${PROJECT_SOURCE_DIR}/include)
+  target_link_libraries(posix-mock-test gtest)
+  if (FMT_PEDANTIC)
+    target_compile_options(posix-mock-test PRIVATE ${PEDANTIC_COMPILE_FLAGS})
+  endif ()
+  if (HAVE_STRTOD_L)
+    target_compile_definitions(posix-mock-test PRIVATE FMT_LOCALE)
+  endif ()
+  add_test(NAME posix-mock-test COMMAND posix-mock-test)
+  add_fmt_test(os-test)
+endif ()
+
+message(STATUS "FMT_PEDANTIC: ${FMT_PEDANTIC}")
+
+if (FMT_PEDANTIC)
+  # Test that the library can be compiled with exceptions disabled.
+  # -fno-exception is broken in icc: https://github.com/fmtlib/fmt/issues/822.
+  if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
+    check_cxx_compiler_flag(-fno-exceptions HAVE_FNO_EXCEPTIONS_FLAG)
+  endif ()
+  if (HAVE_FNO_EXCEPTIONS_FLAG)
+    add_library(noexception-test ../src/format.cc noexception-test.cc)
+    target_include_directories(
+      noexception-test PRIVATE ${PROJECT_SOURCE_DIR}/include)
+    target_compile_options(noexception-test PRIVATE -fno-exceptions)
+    if (FMT_PEDANTIC)
+      target_compile_options(noexception-test PRIVATE ${PEDANTIC_COMPILE_FLAGS})
+    endif ()
+  endif ()
+
+  # Test that the library compiles without locale.
+  add_library(nolocale-test ../src/format.cc)
+  target_include_directories(
+    nolocale-test PRIVATE ${PROJECT_SOURCE_DIR}/include)
+  target_compile_definitions(
+    nolocale-test PRIVATE FMT_STATIC_THOUSANDS_SEPARATOR=1)
+endif ()
+
+# These tests are disabled on Windows because they take too long.
+if (FMT_PEDANTIC AND NOT WIN32)
+  # Test if incorrect API usages produce compilation error.
+  add_test(compile-error-test ${CMAKE_CTEST_COMMAND}
+    --build-and-test
+    "${CMAKE_CURRENT_SOURCE_DIR}/compile-error-test"
+    "${CMAKE_CURRENT_BINARY_DIR}/compile-error-test"
+    --build-generator ${CMAKE_GENERATOR}
+    --build-makeprogram ${CMAKE_MAKE_PROGRAM}
+    --build-options
+    "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
+    "-DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}"
+    "-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}"
+    "-DFMT_DIR=${CMAKE_SOURCE_DIR}"
+    "-DSUPPORTS_USER_DEFINED_LITERALS=${SUPPORTS_USER_DEFINED_LITERALS}")
+
+  # Test if the targets are found from the build directory.
+  add_test(find-package-test ${CMAKE_CTEST_COMMAND}
+    -C ${CMAKE_BUILD_TYPE}
+    --build-and-test
+    "${CMAKE_CURRENT_SOURCE_DIR}/find-package-test"
+    "${CMAKE_CURRENT_BINARY_DIR}/find-package-test"
+    --build-generator ${CMAKE_GENERATOR}
+    --build-makeprogram ${CMAKE_MAKE_PROGRAM}
+    --build-options
+    "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
+    "-DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}"
+    "-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}"
+    "-DFMT_DIR=${PROJECT_BINARY_DIR}"
+    "-DPEDANTIC_COMPILE_FLAGS=${PEDANTIC_COMPILE_FLAGS}"
+    "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}")
+
+  # Test if the targets are found when add_subdirectory is used.
+  add_test(add-subdirectory-test ${CMAKE_CTEST_COMMAND}
+    -C ${CMAKE_BUILD_TYPE}
+    --build-and-test
+    "${CMAKE_CURRENT_SOURCE_DIR}/add-subdirectory-test"
+    "${CMAKE_CURRENT_BINARY_DIR}/add-subdirectory-test"
+    --build-generator ${CMAKE_GENERATOR}
+    --build-makeprogram ${CMAKE_MAKE_PROGRAM}
+    --build-options
+    "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
+    "-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}"
+    "-DPEDANTIC_COMPILE_FLAGS=${PEDANTIC_COMPILE_FLAGS}"
+    "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}")
+endif ()
+
+# This test are disabled on Windows because it is only *NIX issue.
+if (FMT_PEDANTIC AND NOT WIN32)
+  add_test(static-export-test ${CMAKE_CTEST_COMMAND}
+    -C ${CMAKE_BUILD_TYPE}
+    --build-and-test
+    "${CMAKE_CURRENT_SOURCE_DIR}/static-export-test"
+    "${CMAKE_CURRENT_BINARY_DIR}/static-export-test"
+    --build-generator ${CMAKE_GENERATOR}
+    --build-makeprogram ${CMAKE_MAKE_PROGRAM}
+    --build-options
+    "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
+    "-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}"
+    "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}")
+endif ()
+
+# Activate optional CUDA tests if CUDA is found. For version selection see
+# https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#cpp14-language-features
+if (FMT_CUDA_TEST)
+  if (${CMAKE_VERSION} VERSION_LESS 3.15)
+    find_package(CUDA 9.0)
+  else ()
+    include(CheckLanguage)
+    check_language(CUDA)
+    if (CMAKE_CUDA_COMPILER)
+      enable_language(CUDA OPTIONAL)
+      set(CUDA_FOUND TRUE)
+    endif ()
+  endif ()
+
+  if (CUDA_FOUND)
+    add_subdirectory(cuda-test)
+    add_test(NAME cuda-test COMMAND fmt-in-cuda-test)
+  endif ()
+endif ()
diff --git a/3rdparty/fmt/test/add-subdirectory-test/CMakeLists.txt b/3rdparty/fmt/test/add-subdirectory-test/CMakeLists.txt
new file mode 100644
index 00000000..e08d0cf7
--- /dev/null
+++ b/3rdparty/fmt/test/add-subdirectory-test/CMakeLists.txt
@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.1...3.18)
+
+project(fmt-test CXX)
+
+add_subdirectory(../.. fmt)
+
+add_executable(library-test main.cc)
+target_include_directories(library-test PUBLIC SYSTEM .)
+target_compile_options(library-test PRIVATE ${PEDANTIC_COMPILE_FLAGS})
+target_link_libraries(library-test fmt::fmt)
+
+if (TARGET fmt::fmt-header-only)
+  add_executable(header-only-test main.cc)
+  target_include_directories(header-only-test PUBLIC SYSTEM .)
+  target_compile_options(header-only-test PRIVATE ${PEDANTIC_COMPILE_FLAGS})
+  target_link_libraries(header-only-test fmt::fmt-header-only)
+endif ()
diff --git a/3rdparty/fmt/test/add-subdirectory-test/main.cc b/3rdparty/fmt/test/add-subdirectory-test/main.cc
new file mode 100644
index 00000000..fcdf232e
--- /dev/null
+++ b/3rdparty/fmt/test/add-subdirectory-test/main.cc
@@ -0,0 +1,5 @@
+#include "fmt/core.h"
+
+int main(int argc, char** argv) {
+  for (int i = 0; i < argc; ++i) fmt::print("{}: {}\n", i, argv[i]);
+}
diff --git a/3rdparty/fmt/test/args-test.cc b/3rdparty/fmt/test/args-test.cc
new file mode 100644
index 00000000..aa01fa4e
--- /dev/null
+++ b/3rdparty/fmt/test/args-test.cc
@@ -0,0 +1,186 @@
+// Formatting library for C++ - dynamic argument store tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/args.h"
+
+#include <memory>
+
+#include "gtest/gtest.h"
+
+TEST(args_test, basic) {
+  fmt::dynamic_format_arg_store<fmt::format_context> store;
+  store.push_back(42);
+  store.push_back("abc1");
+  store.push_back(1.5f);
+  EXPECT_EQ("42 and abc1 and 1.5", fmt::vformat("{} and {} and {}", store));
+}
+
+TEST(args_test, strings_and_refs) {
+  // Unfortunately the tests are compiled with old ABI so strings use COW.
+  fmt::dynamic_format_arg_store<fmt::format_context> store;
+  char str[] = "1234567890";
+  store.push_back(str);
+  store.push_back(std::cref(str));
+  store.push_back(fmt::string_view{str});
+  str[0] = 'X';
+
+  auto result = fmt::vformat("{} and {} and {}", store);
+  EXPECT_EQ("1234567890 and X234567890 and X234567890", result);
+}
+
+struct custom_type {
+  int i = 0;
+};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<custom_type> {
+  auto parse(format_parse_context& ctx) const -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  template <typename FormatContext>
+  auto format(const custom_type& p, FormatContext& ctx) -> decltype(ctx.out()) {
+    return format_to(ctx.out(), "cust={}", p.i);
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(args_test, custom_format) {
+  fmt::dynamic_format_arg_store<fmt::format_context> store;
+  auto c = custom_type();
+  store.push_back(c);
+  ++c.i;
+  store.push_back(c);
+  ++c.i;
+  store.push_back(std::cref(c));
+  ++c.i;
+  auto result = fmt::vformat("{} and {} and {}", store);
+  EXPECT_EQ("cust=0 and cust=1 and cust=3", result);
+}
+
+struct to_stringable {
+  friend fmt::string_view to_string_view(to_stringable) { return {}; }
+};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<to_stringable> {
+  auto parse(format_parse_context& ctx) const -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  auto format(to_stringable, format_context& ctx) -> decltype(ctx.out()) {
+    return ctx.out();
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(args_test, to_string_and_formatter) {
+  fmt::dynamic_format_arg_store<fmt::format_context> store;
+  auto s = to_stringable();
+  store.push_back(s);
+  store.push_back(std::cref(s));
+  fmt::vformat("", store);
+}
+
+TEST(args_test, named_int) {
+  fmt::dynamic_format_arg_store<fmt::format_context> store;
+  store.push_back(fmt::arg("a1", 42));
+  EXPECT_EQ("42", fmt::vformat("{a1}", store));
+}
+
+TEST(args_test, named_strings) {
+  fmt::dynamic_format_arg_store<fmt::format_context> store;
+  char str[] = "1234567890";
+  store.push_back(fmt::arg("a1", str));
+  store.push_back(fmt::arg("a2", std::cref(str)));
+  str[0] = 'X';
+  EXPECT_EQ("1234567890 and X234567890", fmt::vformat("{a1} and {a2}", store));
+}
+
+TEST(args_test, named_arg_by_ref) {
+  fmt::dynamic_format_arg_store<fmt::format_context> store;
+  char band[] = "Rolling Stones";
+  store.push_back(fmt::arg("band", std::cref(band)));
+  band[9] = 'c';  // Changing band affects the output.
+  EXPECT_EQ(fmt::vformat("{band}", store), "Rolling Scones");
+}
+
+TEST(args_test, named_custom_format) {
+  fmt::dynamic_format_arg_store<fmt::format_context> store;
+  auto c = custom_type();
+  store.push_back(fmt::arg("c1", c));
+  ++c.i;
+  store.push_back(fmt::arg("c2", c));
+  ++c.i;
+  store.push_back(fmt::arg("c_ref", std::cref(c)));
+  ++c.i;
+  auto result = fmt::vformat("{c1} and {c2} and {c_ref}", store);
+  EXPECT_EQ("cust=0 and cust=1 and cust=3", result);
+}
+
+TEST(args_test, clear) {
+  fmt::dynamic_format_arg_store<fmt::format_context> store;
+  store.push_back(42);
+
+  auto result = fmt::vformat("{}", store);
+  EXPECT_EQ("42", result);
+
+  store.push_back(43);
+  result = fmt::vformat("{} and {}", store);
+  EXPECT_EQ("42 and 43", result);
+
+  store.clear();
+  store.push_back(44);
+  result = fmt::vformat("{}", store);
+  EXPECT_EQ("44", result);
+}
+
+TEST(args_test, reserve) {
+  fmt::dynamic_format_arg_store<fmt::format_context> store;
+  store.reserve(2, 1);
+  store.push_back(1.5f);
+  store.push_back(fmt::arg("a1", 42));
+  auto result = fmt::vformat("{a1} and {}", store);
+  EXPECT_EQ("42 and 1.5", result);
+}
+
+struct copy_throwable {
+  copy_throwable() {}
+  copy_throwable(const copy_throwable&) { throw "deal with it"; }
+};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<copy_throwable> {
+  auto parse(format_parse_context& ctx) const -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+  auto format(copy_throwable, format_context& ctx) -> decltype(ctx.out()) {
+    return ctx.out();
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(args_test, throw_on_copy) {
+  fmt::dynamic_format_arg_store<fmt::format_context> store;
+  store.push_back(std::string("foo"));
+  try {
+    store.push_back(copy_throwable());
+  } catch (...) {
+  }
+  EXPECT_EQ(fmt::vformat("{}", store), "foo");
+}
+
+TEST(args_test, move_constructor) {
+  using store_type = fmt::dynamic_format_arg_store<fmt::format_context>;
+  auto store = std::unique_ptr<store_type>(new store_type());
+  store->push_back(42);
+  store->push_back(std::string("foo"));
+  store->push_back(fmt::arg("a1", "foo"));
+  auto moved_store = std::move(*store);
+  store.reset();
+  EXPECT_EQ(fmt::vformat("{} {} {a1}", moved_store), "42 foo foo");
+}
diff --git a/3rdparty/fmt/test/assert-test.cc b/3rdparty/fmt/test/assert-test.cc
new file mode 100644
index 00000000..c74e617e
--- /dev/null
+++ b/3rdparty/fmt/test/assert-test.cc
@@ -0,0 +1,31 @@
+// Formatting library for C++ - FMT_ASSERT test
+//
+// It is a separate test to minimize the number of EXPECT_DEBUG_DEATH checks
+// which are slow on some platforms. In other tests FMT_ASSERT is made to throw
+// an exception which is much faster and easier to check.
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/core.h"
+#include "gtest/gtest.h"
+
+TEST(assert_test, fail) {
+#if GTEST_HAS_DEATH_TEST
+  EXPECT_DEBUG_DEATH(FMT_ASSERT(false, "don't panic!"), "don't panic!");
+#else
+  fmt::print("warning: death tests are not supported\n");
+#endif
+}
+
+TEST(assert_test, dangling_else) {
+  bool test_condition = false;
+  bool executed_else = false;
+  if (test_condition)
+    FMT_ASSERT(true, "");
+  else
+    executed_else = true;
+  EXPECT_TRUE(executed_else);
+}
diff --git a/3rdparty/fmt/test/chrono-test.cc b/3rdparty/fmt/test/chrono-test.cc
new file mode 100644
index 00000000..42360e5f
--- /dev/null
+++ b/3rdparty/fmt/test/chrono-test.cc
@@ -0,0 +1,625 @@
+// Formatting library for C++ - time formatting tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/chrono.h"
+
+#include <ctime>
+#include <vector>
+
+#include "gtest-extra.h"  // EXPECT_THROW_MSG
+#include "util.h"         // get_locale
+
+using fmt::runtime;
+
+using testing::Contains;
+
+auto make_tm() -> std::tm {
+  auto time = std::tm();
+  time.tm_mday = 1;
+  return time;
+}
+
+auto make_hour(int h) -> std::tm {
+  auto time = make_tm();
+  time.tm_hour = h;
+  return time;
+}
+
+auto make_minute(int m) -> std::tm {
+  auto time = make_tm();
+  time.tm_min = m;
+  return time;
+}
+
+auto make_second(int s) -> std::tm {
+  auto time = make_tm();
+  time.tm_sec = s;
+  return time;
+}
+
+std::string system_strftime(const std::string& format, const std::tm* timeptr,
+                            std::locale* locptr = nullptr) {
+  auto loc = locptr ? *locptr : std::locale::classic();
+  auto& facet = std::use_facet<std::time_put<char>>(loc);
+  std::ostringstream os;
+  os.imbue(loc);
+  facet.put(os, os, ' ', timeptr, format.c_str(),
+            format.c_str() + format.size());
+#ifdef _WIN32
+  // Workaround a bug in older versions of Universal CRT.
+  auto str = os.str();
+  if (str == "-0000") str = "+0000";
+  return str;
+#else
+  return os.str();
+#endif
+}
+
+FMT_CONSTEXPR std::tm make_tm(int year, int mon, int mday, int hour, int min,
+                              int sec) {
+  auto tm = std::tm();
+  tm.tm_sec = sec;
+  tm.tm_min = min;
+  tm.tm_hour = hour;
+  tm.tm_mday = mday;
+  tm.tm_mon = mon - 1;
+  tm.tm_year = year - 1900;
+  return tm;
+}
+
+TEST(chrono_test, format_tm) {
+  auto tm = std::tm();
+  tm.tm_year = 116;
+  tm.tm_mon = 3;
+  tm.tm_mday = 25;
+  tm.tm_hour = 11;
+  tm.tm_min = 22;
+  tm.tm_sec = 33;
+  EXPECT_EQ(fmt::format("The date is {:%Y-%m-%d %H:%M:%S}.", tm),
+            "The date is 2016-04-25 11:22:33.");
+  EXPECT_EQ(fmt::format("{:%Y}", tm), "2016");
+  EXPECT_EQ(fmt::format("{:%C}", tm), "20");
+  EXPECT_EQ(fmt::format("{:%C%y}", tm), fmt::format("{:%Y}", tm));
+  EXPECT_EQ(fmt::format("{:%e}", tm), "25");
+  EXPECT_EQ(fmt::format("{:%D}", tm), "04/25/16");
+  EXPECT_EQ(fmt::format("{:%F}", tm), "2016-04-25");
+  EXPECT_EQ(fmt::format("{:%T}", tm), "11:22:33");
+
+  // Short year
+  tm.tm_year = 999 - 1900;
+  tm.tm_mon = 0;   // for %G
+  tm.tm_mday = 2;  // for %G
+  tm.tm_wday = 3;  // for %G
+  tm.tm_yday = 1;  // for %G
+  EXPECT_EQ(fmt::format("{:%Y}", tm), "0999");
+  EXPECT_EQ(fmt::format("{:%C%y}", tm), "0999");
+  EXPECT_EQ(fmt::format("{:%G}", tm), "0999");
+
+  tm.tm_year = 27 - 1900;
+  EXPECT_EQ(fmt::format("{:%Y}", tm), "0027");
+  EXPECT_EQ(fmt::format("{:%C%y}", tm), "0027");
+
+  // Overflow year
+  tm.tm_year = 2147483647;
+  EXPECT_EQ(fmt::format("{:%Y}", tm), "2147485547");
+
+  tm.tm_year = -2147483648;
+  EXPECT_EQ(fmt::format("{:%Y}", tm), "-2147481748");
+
+  // for week on the year
+  // https://www.cl.cam.ac.uk/~mgk25/iso-time.html
+  std::vector<std::tm> tm_list = {
+      make_tm(1975, 12, 29, 12, 14, 16),  // W01
+      make_tm(1977, 1, 2, 12, 14, 16),    // W53
+      make_tm(1999, 12, 27, 12, 14, 16),  // W52
+      make_tm(1999, 12, 31, 12, 14, 16),  // W52
+      make_tm(2000, 1, 1, 12, 14, 16),    // W52
+      make_tm(2000, 1, 2, 12, 14, 16),    // W52
+      make_tm(2000, 1, 3, 12, 14, 16)     // W1
+  };
+  const std::string iso_week_spec = "%Y-%m-%d: %G %g %V";
+  for (auto ctm : tm_list) {
+    // Calculate tm_yday, tm_wday, etc.
+    std::time_t t = std::mktime(&ctm);
+    tm = *std::localtime(&t);
+
+    auto fmt_spec = fmt::format("{{:{}}}", iso_week_spec);
+    EXPECT_EQ(system_strftime(iso_week_spec, &tm),
+              fmt::format(fmt::runtime(fmt_spec), tm));
+  }
+
+  // Every day from 1970-01-01
+  std::time_t time_now = std::time(nullptr);
+  for (std::time_t t = 6 * 3600; t < time_now; t += 86400) {
+    tm = *std::localtime(&t);
+
+    auto fmt_spec = fmt::format("{{:{}}}", iso_week_spec);
+    EXPECT_EQ(system_strftime(iso_week_spec, &tm),
+              fmt::format(fmt::runtime(fmt_spec), tm));
+  }
+}
+
+// MSVC:
+//  minkernel\crts\ucrt\src\appcrt\time\wcsftime.cpp(971) : Assertion failed:
+//  timeptr->tm_year >= -1900 && timeptr->tm_year <= 8099
+#ifndef _WIN32
+TEST(chrono_test, format_tm_future) {
+  auto tm = std::tm();
+  tm.tm_year = 10445;  // 10000+ years
+  tm.tm_mon = 3;
+  tm.tm_mday = 25;
+  tm.tm_hour = 11;
+  tm.tm_min = 22;
+  tm.tm_sec = 33;
+  EXPECT_EQ(fmt::format("The date is {:%Y-%m-%d %H:%M:%S}.", tm),
+            "The date is 12345-04-25 11:22:33.");
+  EXPECT_EQ(fmt::format("{:%Y}", tm), "12345");
+  EXPECT_EQ(fmt::format("{:%C}", tm), "123");
+  EXPECT_EQ(fmt::format("{:%C%y}", tm), fmt::format("{:%Y}", tm));
+  EXPECT_EQ(fmt::format("{:%D}", tm), "04/25/45");
+  EXPECT_EQ(fmt::format("{:%F}", tm), "12345-04-25");
+  EXPECT_EQ(fmt::format("{:%T}", tm), "11:22:33");
+}
+
+TEST(chrono_test, format_tm_past) {
+  auto tm = std::tm();
+  tm.tm_year = -2001;
+  tm.tm_mon = 3;
+  tm.tm_mday = 25;
+  tm.tm_hour = 11;
+  tm.tm_min = 22;
+  tm.tm_sec = 33;
+  EXPECT_EQ(fmt::format("The date is {:%Y-%m-%d %H:%M:%S}.", tm),
+            "The date is -101-04-25 11:22:33.");
+  EXPECT_EQ(fmt::format("{:%Y}", tm), "-101");
+
+  // macOS  %C - "-1"
+  // Linux  %C - "-2"
+  // fmt    %C - "-1"
+  EXPECT_EQ(fmt::format("{:%C}", tm), "-1");
+  EXPECT_EQ(fmt::format("{:%C%y}", tm), fmt::format("{:%Y}", tm));
+
+  // macOS  %D - "04/25/01" (%y)
+  // Linux  %D - "04/25/99" (%y)
+  // fmt    %D - "04/25/01" (%y)
+  EXPECT_EQ(fmt::format("{:%D}", tm), "04/25/01");
+
+  EXPECT_EQ(fmt::format("{:%F}", tm), "-101-04-25");
+  EXPECT_EQ(fmt::format("{:%T}", tm), "11:22:33");
+
+  tm.tm_year = -1901;  // -1
+  EXPECT_EQ(fmt::format("{:%Y}", tm), "-001");
+  EXPECT_EQ(fmt::format("{:%C%y}", tm), fmt::format("{:%Y}", tm));
+
+  tm.tm_year = -1911;  // -11
+  EXPECT_EQ(fmt::format("{:%Y}", tm), "-011");
+  EXPECT_EQ(fmt::format("{:%C%y}", tm), fmt::format("{:%Y}", tm));
+}
+#endif
+
+TEST(chrono_test, grow_buffer) {
+  auto s = std::string("{:");
+  for (int i = 0; i < 30; ++i) s += "%c";
+  s += "}\n";
+  auto t = std::time(nullptr);
+  (void)fmt::format(fmt::runtime(s), *std::localtime(&t));
+}
+
+TEST(chrono_test, format_to_empty_container) {
+  auto time = std::tm();
+  time.tm_sec = 42;
+  auto s = std::string();
+  fmt::format_to(std::back_inserter(s), "{:%S}", time);
+  EXPECT_EQ(s, "42");
+}
+
+TEST(chrono_test, empty_result) { EXPECT_EQ(fmt::format("{}", std::tm()), ""); }
+
+auto equal(const std::tm& lhs, const std::tm& rhs) -> bool {
+  return lhs.tm_sec == rhs.tm_sec && lhs.tm_min == rhs.tm_min &&
+         lhs.tm_hour == rhs.tm_hour && lhs.tm_mday == rhs.tm_mday &&
+         lhs.tm_mon == rhs.tm_mon && lhs.tm_year == rhs.tm_year &&
+         lhs.tm_wday == rhs.tm_wday && lhs.tm_yday == rhs.tm_yday &&
+         lhs.tm_isdst == rhs.tm_isdst;
+}
+
+TEST(chrono_test, localtime) {
+  auto t = std::time(nullptr);
+  auto tm = *std::localtime(&t);
+  EXPECT_TRUE(equal(tm, fmt::localtime(t)));
+}
+
+TEST(chrono_test, gmtime) {
+  auto t = std::time(nullptr);
+  auto tm = *std::gmtime(&t);
+  EXPECT_TRUE(equal(tm, fmt::gmtime(t)));
+}
+
+template <typename TimePoint> auto strftime_full(TimePoint tp) -> std::string {
+  auto t = std::chrono::system_clock::to_time_t(tp);
+  auto tm = *std::localtime(&t);
+  return system_strftime("%Y-%m-%d %H:%M:%S", &tm);
+}
+
+TEST(chrono_test, time_point) {
+  auto t1 = std::chrono::system_clock::now();
+  EXPECT_EQ(strftime_full(t1), fmt::format("{:%Y-%m-%d %H:%M:%S}", t1));
+  EXPECT_EQ(strftime_full(t1), fmt::format("{}", t1));
+  using time_point =
+      std::chrono::time_point<std::chrono::system_clock, std::chrono::seconds>;
+  auto t2 = time_point(std::chrono::seconds(42));
+  EXPECT_EQ(strftime_full(t2), fmt::format("{:%Y-%m-%d %H:%M:%S}", t2));
+
+  std::vector<std::string> spec_list = {
+      "%%",  "%n",  "%t",  "%Y",  "%EY", "%y",  "%Oy", "%Ey", "%C",
+      "%EC", "%G",  "%g",  "%b",  "%h",  "%B",  "%m",  "%Om", "%U",
+      "%OU", "%W",  "%OW", "%V",  "%OV", "%j",  "%d",  "%Od", "%e",
+      "%Oe", "%a",  "%A",  "%w",  "%Ow", "%u",  "%Ou", "%H",  "%OH",
+      "%I",  "%OI", "%M",  "%OM", "%S",  "%OS", "%x",  "%Ex", "%X",
+      "%EX", "%D",  "%F",  "%R",  "%T",  "%p",  "%z",  "%Z"};
+  spec_list.push_back("%Y-%m-%d %H:%M:%S");
+#ifndef _WIN32
+  // Disabled on Windows because these formats are not consistent among
+  // platforms.
+  spec_list.insert(spec_list.end(), {"%c", "%Ec", "%r"});
+#endif
+
+  for (const auto& spec : spec_list) {
+    auto t = std::chrono::system_clock::to_time_t(t1);
+    auto tm = *std::localtime(&t);
+
+    auto sys_output = system_strftime(spec, &tm);
+
+    auto fmt_spec = fmt::format("{{:{}}}", spec);
+    EXPECT_EQ(sys_output, fmt::format(fmt::runtime(fmt_spec), t1));
+    EXPECT_EQ(sys_output, fmt::format(fmt::runtime(fmt_spec), tm));
+  }
+}
+
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+
+TEST(chrono_test, format_default) {
+  EXPECT_EQ("42s", fmt::format("{}", std::chrono::seconds(42)));
+  EXPECT_EQ("42as",
+            fmt::format("{}", std::chrono::duration<int, std::atto>(42)));
+  EXPECT_EQ("42fs",
+            fmt::format("{}", std::chrono::duration<int, std::femto>(42)));
+  EXPECT_EQ("42ps",
+            fmt::format("{}", std::chrono::duration<int, std::pico>(42)));
+  EXPECT_EQ("42ns", fmt::format("{}", std::chrono::nanoseconds(42)));
+  EXPECT_EQ("42µs", fmt::format("{}", std::chrono::microseconds(42)));
+  EXPECT_EQ("42ms", fmt::format("{}", std::chrono::milliseconds(42)));
+  EXPECT_EQ("42cs",
+            fmt::format("{}", std::chrono::duration<int, std::centi>(42)));
+  EXPECT_EQ("42ds",
+            fmt::format("{}", std::chrono::duration<int, std::deci>(42)));
+  EXPECT_EQ("42s", fmt::format("{}", std::chrono::seconds(42)));
+  EXPECT_EQ("42das",
+            fmt::format("{}", std::chrono::duration<int, std::deca>(42)));
+  EXPECT_EQ("42hs",
+            fmt::format("{}", std::chrono::duration<int, std::hecto>(42)));
+  EXPECT_EQ("42ks",
+            fmt::format("{}", std::chrono::duration<int, std::kilo>(42)));
+  EXPECT_EQ("42Ms",
+            fmt::format("{}", std::chrono::duration<int, std::mega>(42)));
+  EXPECT_EQ("42Gs",
+            fmt::format("{}", std::chrono::duration<int, std::giga>(42)));
+  EXPECT_EQ("42Ts",
+            fmt::format("{}", std::chrono::duration<int, std::tera>(42)));
+  EXPECT_EQ("42Ps",
+            fmt::format("{}", std::chrono::duration<int, std::peta>(42)));
+  EXPECT_EQ("42Es",
+            fmt::format("{}", std::chrono::duration<int, std::exa>(42)));
+  EXPECT_EQ("42m", fmt::format("{}", std::chrono::minutes(42)));
+  EXPECT_EQ("42h", fmt::format("{}", std::chrono::hours(42)));
+  EXPECT_EQ(
+      "42[15]s",
+      fmt::format("{}", std::chrono::duration<int, std::ratio<15, 1>>(42)));
+  EXPECT_EQ(
+      "42[15/4]s",
+      fmt::format("{}", std::chrono::duration<int, std::ratio<15, 4>>(42)));
+}
+
+TEST(chrono_test, align) {
+  auto s = std::chrono::seconds(42);
+  EXPECT_EQ("42s  ", fmt::format("{:5}", s));
+  EXPECT_EQ("42s  ", fmt::format("{:{}}", s, 5));
+  EXPECT_EQ("  42s", fmt::format("{:>5}", s));
+  EXPECT_EQ("**42s**", fmt::format("{:*^7}", s));
+  EXPECT_EQ("03:25:45    ",
+            fmt::format("{:12%H:%M:%S}", std::chrono::seconds(12345)));
+  EXPECT_EQ("    03:25:45",
+            fmt::format("{:>12%H:%M:%S}", std::chrono::seconds(12345)));
+  EXPECT_EQ("~~03:25:45~~",
+            fmt::format("{:~^12%H:%M:%S}", std::chrono::seconds(12345)));
+  EXPECT_EQ("03:25:45    ",
+            fmt::format("{:{}%H:%M:%S}", std::chrono::seconds(12345), 12));
+}
+
+TEST(chrono_test, format_specs) {
+  EXPECT_EQ("%", fmt::format("{:%%}", std::chrono::seconds(0)));
+  EXPECT_EQ("\n", fmt::format("{:%n}", std::chrono::seconds(0)));
+  EXPECT_EQ("\t", fmt::format("{:%t}", std::chrono::seconds(0)));
+  EXPECT_EQ("00", fmt::format("{:%S}", std::chrono::seconds(0)));
+  EXPECT_EQ("00", fmt::format("{:%S}", std::chrono::seconds(60)));
+  EXPECT_EQ("42", fmt::format("{:%S}", std::chrono::seconds(42)));
+  EXPECT_EQ("01.234", fmt::format("{:%S}", std::chrono::milliseconds(1234)));
+  EXPECT_EQ("00", fmt::format("{:%M}", std::chrono::minutes(0)));
+  EXPECT_EQ("00", fmt::format("{:%M}", std::chrono::minutes(60)));
+  EXPECT_EQ("42", fmt::format("{:%M}", std::chrono::minutes(42)));
+  EXPECT_EQ("01", fmt::format("{:%M}", std::chrono::seconds(61)));
+  EXPECT_EQ("00", fmt::format("{:%H}", std::chrono::hours(0)));
+  EXPECT_EQ("00", fmt::format("{:%H}", std::chrono::hours(24)));
+  EXPECT_EQ("14", fmt::format("{:%H}", std::chrono::hours(14)));
+  EXPECT_EQ("01", fmt::format("{:%H}", std::chrono::minutes(61)));
+  EXPECT_EQ("12", fmt::format("{:%I}", std::chrono::hours(0)));
+  EXPECT_EQ("12", fmt::format("{:%I}", std::chrono::hours(12)));
+  EXPECT_EQ("12", fmt::format("{:%I}", std::chrono::hours(24)));
+  EXPECT_EQ("04", fmt::format("{:%I}", std::chrono::hours(4)));
+  EXPECT_EQ("02", fmt::format("{:%I}", std::chrono::hours(14)));
+  EXPECT_EQ("03:25:45",
+            fmt::format("{:%H:%M:%S}", std::chrono::seconds(12345)));
+  EXPECT_EQ("03:25", fmt::format("{:%R}", std::chrono::seconds(12345)));
+  EXPECT_EQ("03:25:45", fmt::format("{:%T}", std::chrono::seconds(12345)));
+  EXPECT_EQ("12345", fmt::format("{:%Q}", std::chrono::seconds(12345)));
+  EXPECT_EQ("s", fmt::format("{:%q}", std::chrono::seconds(12345)));
+}
+
+TEST(chrono_test, invalid_specs) {
+  auto sec = std::chrono::seconds(0);
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%a}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%A}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%c}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%x}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%Ex}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%X}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%EX}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%D}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%F}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%Ec}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%w}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%u}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%b}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%B}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%z}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%Z}"), sec), fmt::format_error,
+                   "no date");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%Eq}"), sec), fmt::format_error,
+                   "invalid format");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%Oq}"), sec), fmt::format_error,
+                   "invalid format");
+}
+
+auto format_tm(const std::tm& time, fmt::string_view spec,
+               const std::locale& loc) -> std::string {
+  auto& facet = std::use_facet<std::time_put<char>>(loc);
+  std::ostringstream os;
+  os.imbue(loc);
+  facet.put(os, os, ' ', &time, spec.begin(), spec.end());
+  return os.str();
+}
+
+TEST(chrono_test, locale) {
+  auto loc = get_locale("ja_JP.utf8");
+  if (loc == std::locale::classic()) return;
+#  define EXPECT_TIME(spec, time, duration)                     \
+    {                                                           \
+      auto jp_loc = std::locale("ja_JP.utf8");                  \
+      EXPECT_EQ(format_tm(time, spec, jp_loc),                  \
+                fmt::format(jp_loc, "{:L" spec "}", duration)); \
+    }
+  EXPECT_TIME("%OH", make_hour(14), std::chrono::hours(14));
+  EXPECT_TIME("%OI", make_hour(14), std::chrono::hours(14));
+  EXPECT_TIME("%OM", make_minute(42), std::chrono::minutes(42));
+  EXPECT_TIME("%OS", make_second(42), std::chrono::seconds(42));
+  auto time = make_tm();
+  time.tm_hour = 3;
+  time.tm_min = 25;
+  time.tm_sec = 45;
+  auto sec = std::chrono::seconds(12345);
+  EXPECT_TIME("%r", time, sec);
+  EXPECT_TIME("%p", time, sec);
+}
+
+using dms = std::chrono::duration<double, std::milli>;
+
+TEST(chrono_test, format_default_fp) {
+  typedef std::chrono::duration<float> fs;
+  EXPECT_EQ("1.234s", fmt::format("{}", fs(1.234)));
+  typedef std::chrono::duration<float, std::milli> fms;
+  EXPECT_EQ("1.234ms", fmt::format("{}", fms(1.234)));
+  typedef std::chrono::duration<double> ds;
+  EXPECT_EQ("1.234s", fmt::format("{}", ds(1.234)));
+  EXPECT_EQ("1.234ms", fmt::format("{}", dms(1.234)));
+}
+
+TEST(chrono_test, format_precision) {
+  EXPECT_THROW_MSG(
+      (void)fmt::format(runtime("{:.2}"), std::chrono::seconds(42)),
+      fmt::format_error, "precision not allowed for this argument type");
+  EXPECT_EQ("1ms", fmt::format("{:.0}", dms(1.234)));
+  EXPECT_EQ("1.2ms", fmt::format("{:.1}", dms(1.234)));
+  EXPECT_EQ("1.23ms", fmt::format("{:.{}}", dms(1.234), 2));
+
+  EXPECT_EQ("13ms", fmt::format("{:.0}", dms(12.56)));
+  EXPECT_EQ("12.6ms", fmt::format("{:.1}", dms(12.56)));
+  EXPECT_EQ("12.56ms", fmt::format("{:.2}", dms(12.56)));
+}
+
+TEST(chrono_test, format_full_specs) {
+  EXPECT_EQ("1ms   ", fmt::format("{:6.0}", dms(1.234)));
+  EXPECT_EQ("1.2ms ", fmt::format("{:6.1}", dms(1.234)));
+  EXPECT_EQ("  1.23ms", fmt::format("{:>8.{}}", dms(1.234), 2));
+  EXPECT_EQ(" 1.2ms ", fmt::format("{:^{}.{}}", dms(1.234), 7, 1));
+  EXPECT_EQ(" 1.23ms ", fmt::format("{0:^{2}.{1}}", dms(1.234), 2, 8));
+  EXPECT_EQ("=1.234ms=", fmt::format("{:=^{}.{}}", dms(1.234), 9, 3));
+  EXPECT_EQ("*1.2340ms*", fmt::format("{:*^10.4}", dms(1.234)));
+
+  EXPECT_EQ("13ms  ", fmt::format("{:6.0}", dms(12.56)));
+  EXPECT_EQ("    13ms", fmt::format("{:>8.{}}", dms(12.56), 0));
+  EXPECT_EQ(" 13ms ", fmt::format("{:^{}.{}}", dms(12.56), 6, 0));
+  EXPECT_EQ("  13ms  ", fmt::format("{0:^{2}.{1}}", dms(12.56), 0, 8));
+  EXPECT_EQ("==13ms===", fmt::format("{:=^{}.{}}", dms(12.56), 9, 0));
+  EXPECT_EQ("***13ms***", fmt::format("{:*^10.0}", dms(12.56)));
+}
+
+TEST(chrono_test, format_simple_q) {
+  typedef std::chrono::duration<float> fs;
+  EXPECT_EQ("1.234 s", fmt::format("{:%Q %q}", fs(1.234)));
+  typedef std::chrono::duration<float, std::milli> fms;
+  EXPECT_EQ("1.234 ms", fmt::format("{:%Q %q}", fms(1.234)));
+  typedef std::chrono::duration<double> ds;
+  EXPECT_EQ("1.234 s", fmt::format("{:%Q %q}", ds(1.234)));
+  EXPECT_EQ("1.234 ms", fmt::format("{:%Q %q}", dms(1.234)));
+}
+
+TEST(chrono_test, format_precision_q) {
+  EXPECT_THROW_MSG(
+      (void)fmt::format(runtime("{:.2%Q %q}"), std::chrono::seconds(42)),
+      fmt::format_error, "precision not allowed for this argument type");
+  EXPECT_EQ("1.2 ms", fmt::format("{:.1%Q %q}", dms(1.234)));
+  EXPECT_EQ("1.23 ms", fmt::format("{:.{}%Q %q}", dms(1.234), 2));
+}
+
+TEST(chrono_test, format_full_specs_q) {
+  EXPECT_EQ("1 ms   ", fmt::format("{:7.0%Q %q}", dms(1.234)));
+  EXPECT_EQ("1.2 ms ", fmt::format("{:7.1%Q %q}", dms(1.234)));
+  EXPECT_EQ(" 1.23 ms", fmt::format("{:>8.{}%Q %q}", dms(1.234), 2));
+  EXPECT_EQ(" 1.2 ms ", fmt::format("{:^{}.{}%Q %q}", dms(1.234), 8, 1));
+  EXPECT_EQ(" 1.23 ms ", fmt::format("{0:^{2}.{1}%Q %q}", dms(1.234), 2, 9));
+  EXPECT_EQ("=1.234 ms=", fmt::format("{:=^{}.{}%Q %q}", dms(1.234), 10, 3));
+  EXPECT_EQ("*1.2340 ms*", fmt::format("{:*^11.4%Q %q}", dms(1.234)));
+
+  EXPECT_EQ("13 ms  ", fmt::format("{:7.0%Q %q}", dms(12.56)));
+  EXPECT_EQ("   13 ms", fmt::format("{:>8.{}%Q %q}", dms(12.56), 0));
+  EXPECT_EQ(" 13 ms  ", fmt::format("{:^{}.{}%Q %q}", dms(12.56), 8, 0));
+  EXPECT_EQ("  13 ms  ", fmt::format("{0:^{2}.{1}%Q %q}", dms(12.56), 0, 9));
+  EXPECT_EQ("==13 ms==", fmt::format("{:=^{}.{}%Q %q}", dms(12.56), 9, 0));
+  EXPECT_EQ("***13 ms***", fmt::format("{:*^11.0%Q %q}", dms(12.56)));
+}
+
+TEST(chrono_test, invalid_width_id) {
+  EXPECT_THROW((void)fmt::format(runtime("{:{o}"), std::chrono::seconds(0)),
+               fmt::format_error);
+}
+
+TEST(chrono_test, invalid_colons) {
+  EXPECT_THROW((void)fmt::format(runtime("{0}=:{0::"), std::chrono::seconds(0)),
+               fmt::format_error);
+}
+
+TEST(chrono_test, negative_durations) {
+  EXPECT_EQ("-12345", fmt::format("{:%Q}", std::chrono::seconds(-12345)));
+  EXPECT_EQ("-03:25:45",
+            fmt::format("{:%H:%M:%S}", std::chrono::seconds(-12345)));
+  EXPECT_EQ("-00:01",
+            fmt::format("{:%M:%S}", std::chrono::duration<double>(-1)));
+  EXPECT_EQ("s", fmt::format("{:%q}", std::chrono::seconds(-12345)));
+  EXPECT_EQ("-00.127",
+            fmt::format("{:%S}",
+                        std::chrono::duration<signed char, std::milli>{-127}));
+  auto min = std::numeric_limits<int>::min();
+  EXPECT_EQ(fmt::format("{}", min),
+            fmt::format("{:%Q}", std::chrono::duration<int>(min)));
+}
+
+TEST(chrono_test, special_durations) {
+  auto value = fmt::format("{:%S}", std::chrono::duration<double>(1e20));
+  EXPECT_EQ(value, "40");
+  auto nan = std::numeric_limits<double>::quiet_NaN();
+  EXPECT_EQ(
+      "nan nan nan nan nan:nan nan",
+      fmt::format("{:%I %H %M %S %R %r}", std::chrono::duration<double>(nan)));
+  EXPECT_EQ(fmt::format("{}", std::chrono::duration<float, std::exa>(1)),
+            "1Es");
+  EXPECT_EQ(fmt::format("{}", std::chrono::duration<float, std::atto>(1)),
+            "1as");
+  EXPECT_EQ(fmt::format("{:%R}", std::chrono::duration<char, std::mega>{2}),
+            "03:33");
+  EXPECT_EQ(fmt::format("{:%T}", std::chrono::duration<char, std::mega>{2}),
+            "03:33:20");
+}
+
+TEST(chrono_test, unsigned_duration) {
+  EXPECT_EQ("42s", fmt::format("{}", std::chrono::duration<unsigned>(42)));
+}
+
+TEST(chrono_test, weekday) {
+  auto loc = get_locale("ru_RU.UTF-8");
+  std::locale::global(loc);
+  auto mon = fmt::weekday(1);
+
+  auto tm = std::tm();
+  tm.tm_wday = static_cast<int>(mon.c_encoding());
+
+  EXPECT_EQ(fmt::format("{}", mon), "Mon");
+  EXPECT_EQ(fmt::format("{:%a}", tm), "Mon");
+
+  if (loc != std::locale::classic()) {
+    EXPECT_THAT((std::vector<std::string>{"пн", "Пн", "пнд", "Пнд"}),
+                Contains(fmt::format(loc, "{:L}", mon)));
+    EXPECT_THAT((std::vector<std::string>{"пн", "Пн", "пнд", "Пнд"}),
+                Contains(fmt::format(loc, "{:%a}", tm)));
+  }
+}
+
+TEST(chrono_test, cpp20_duration_subsecond_support) {
+  using attoseconds = std::chrono::duration<long long, std::atto>;
+  // Check that 18 digits of subsecond precision are supported.
+  EXPECT_EQ(fmt::format("{:%S}", attoseconds{999999999999999999}),
+            "00.999999999999999999");
+  EXPECT_EQ(fmt::format("{:%S}", attoseconds{673231113420148734}),
+            "00.673231113420148734");
+  EXPECT_EQ(fmt::format("{:%S}", attoseconds{-673231113420148734}),
+            "-00.673231113420148734");
+  EXPECT_EQ(fmt::format("{:%S}", std::chrono::nanoseconds{13420148734}),
+            "13.420148734");
+  EXPECT_EQ(fmt::format("{:%S}", std::chrono::nanoseconds{-13420148734}),
+            "-13.420148734");
+  EXPECT_EQ(fmt::format("{:%S}", std::chrono::milliseconds{1234}), "01.234");
+  {
+    // Check that {:%H:%M:%S} is equivalent to {:%T}.
+    auto dur = std::chrono::milliseconds{3601234};
+    auto formatted_dur = fmt::format("{:%T}", dur);
+    EXPECT_EQ(formatted_dur, "01:00:01.234");
+    EXPECT_EQ(fmt::format("{:%H:%M:%S}", dur), formatted_dur);
+  }
+  using nanoseconds_dbl = std::chrono::duration<double, std::nano>;
+  EXPECT_EQ(fmt::format("{:%S}", nanoseconds_dbl{-123456789}), "-00.123456789");
+  EXPECT_EQ(fmt::format("{:%S}", nanoseconds_dbl{9123456789}), "09.123456789");
+  // Verify that only the seconds part is extracted and printed.
+  EXPECT_EQ(fmt::format("{:%S}", nanoseconds_dbl{99123456789}), "39.123456789");
+  EXPECT_EQ(fmt::format("{:%S}", nanoseconds_dbl{99123000000}), "39.123000000");
+  {
+    // Now the hour is printed, and we also test if negative doubles work.
+    auto dur = nanoseconds_dbl{-99123456789};
+    auto formatted_dur = fmt::format("{:%T}", dur);
+    EXPECT_EQ(formatted_dur, "-00:01:39.123456789");
+    EXPECT_EQ(fmt::format("{:%H:%M:%S}", dur), formatted_dur);
+  }
+  // Check that durations with precision greater than std::chrono::seconds have
+  // fixed precision, and print zeros even if there is no fractional part.
+  EXPECT_EQ(fmt::format("{:%S}", std::chrono::microseconds{7000000}),
+            "07.000000");
+}
+
+#endif  // FMT_STATIC_THOUSANDS_SEPARATOR
diff --git a/3rdparty/fmt/test/color-test.cc b/3rdparty/fmt/test/color-test.cc
new file mode 100644
index 00000000..af8f1494
--- /dev/null
+++ b/3rdparty/fmt/test/color-test.cc
@@ -0,0 +1,66 @@
+// Formatting library for C++ - color tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/color.h"
+
+#include <iterator>  // std::back_inserter
+
+#include "gtest-extra.h"  // EXPECT_WRITE
+
+TEST(color_test, format) {
+  EXPECT_EQ(fmt::format(fg(fmt::rgb(255, 20, 30)), "rgb(255,20,30)"),
+            "\x1b[38;2;255;020;030mrgb(255,20,30)\x1b[0m");
+  EXPECT_EQ(fmt::format(fg(fmt::color::blue), "blue"),
+            "\x1b[38;2;000;000;255mblue\x1b[0m");
+  EXPECT_EQ(
+      fmt::format(fg(fmt::color::blue) | bg(fmt::color::red), "two color"),
+      "\x1b[38;2;000;000;255m\x1b[48;2;255;000;000mtwo color\x1b[0m");
+  EXPECT_EQ(fmt::format(fmt::emphasis::bold, "bold"), "\x1b[1mbold\x1b[0m");
+  EXPECT_EQ(fmt::format(fmt::emphasis::faint, "faint"), "\x1b[2mfaint\x1b[0m");
+  EXPECT_EQ(fmt::format(fmt::emphasis::italic, "italic"),
+            "\x1b[3mitalic\x1b[0m");
+  EXPECT_EQ(fmt::format(fmt::emphasis::underline, "underline"),
+            "\x1b[4munderline\x1b[0m");
+  EXPECT_EQ(fmt::format(fmt::emphasis::blink, "blink"), "\x1b[5mblink\x1b[0m");
+  EXPECT_EQ(fmt::format(fmt::emphasis::reverse, "reverse"),
+            "\x1b[7mreverse\x1b[0m");
+  EXPECT_EQ(fmt::format(fmt::emphasis::conceal, "conceal"),
+            "\x1b[8mconceal\x1b[0m");
+  EXPECT_EQ(fmt::format(fmt::emphasis::strikethrough, "strikethrough"),
+            "\x1b[9mstrikethrough\x1b[0m");
+  EXPECT_EQ(
+      fmt::format(fg(fmt::color::blue) | fmt::emphasis::bold, "blue/bold"),
+      "\x1b[1m\x1b[38;2;000;000;255mblue/bold\x1b[0m");
+  EXPECT_EQ(fmt::format(fmt::emphasis::bold, "bold error"),
+            "\x1b[1mbold error\x1b[0m");
+  EXPECT_EQ(fmt::format(fg(fmt::color::blue), "blue log"),
+            "\x1b[38;2;000;000;255mblue log\x1b[0m");
+  EXPECT_EQ(fmt::format(fmt::text_style(), "hi"), "hi");
+  EXPECT_EQ(fmt::format(fg(fmt::terminal_color::red), "tred"),
+            "\x1b[31mtred\x1b[0m");
+  EXPECT_EQ(fmt::format(bg(fmt::terminal_color::cyan), "tcyan"),
+            "\x1b[46mtcyan\x1b[0m");
+  EXPECT_EQ(fmt::format(fg(fmt::terminal_color::bright_green), "tbgreen"),
+            "\x1b[92mtbgreen\x1b[0m");
+  EXPECT_EQ(fmt::format(bg(fmt::terminal_color::bright_magenta), "tbmagenta"),
+            "\x1b[105mtbmagenta\x1b[0m");
+  EXPECT_EQ(fmt::format(fg(fmt::terminal_color::red), "{}", "foo"),
+            "\x1b[31mfoo\x1b[0m");
+}
+
+TEST(color_test, format_to) {
+  auto out = std::string();
+  fmt::format_to(std::back_inserter(out), fg(fmt::rgb(255, 20, 30)),
+                 "rgb(255,20,30){}{}{}", 1, 2, 3);
+  EXPECT_EQ(fmt::to_string(out),
+            "\x1b[38;2;255;020;030mrgb(255,20,30)123\x1b[0m");
+}
+
+TEST(color_test, print) {
+  EXPECT_WRITE(stdout, fmt::print(fg(fmt::rgb(255, 20, 30)), "rgb(255,20,30)"),
+               "\x1b[38;2;255;020;030mrgb(255,20,30)\x1b[0m");
+}
diff --git a/3rdparty/fmt/test/compile-error-test/CMakeLists.txt b/3rdparty/fmt/test/compile-error-test/CMakeLists.txt
new file mode 100644
index 00000000..db7a9429
--- /dev/null
+++ b/3rdparty/fmt/test/compile-error-test/CMakeLists.txt
@@ -0,0 +1,203 @@
+# Test if compile errors are produced where necessary.
+
+cmake_minimum_required(VERSION 3.1...3.18)
+project(compile-error-test CXX)
+
+set(fmt_headers "
+  #include <fmt/format.h>
+  #include <fmt/xchar.h>
+")
+
+set(error_test_names "")
+set(non_error_test_content "")
+
+# For error tests (we expect them to produce compilation error):
+#  * adds a name of test into `error_test_names` list
+#  * generates a single source file (with the same name) for each test
+# For non-error tests (we expect them to compile successfully):
+#  * adds a code segment as separate function to `non_error_test_content`
+function (expect_compile name code_fragment)
+  cmake_parse_arguments(EXPECT_COMPILE "ERROR" "" "" ${ARGN})
+  string(MAKE_C_IDENTIFIER "${name}" test_name)
+
+  if (EXPECT_COMPILE_ERROR)
+    file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/${test_name}.cc" "
+      ${fmt_headers}
+      void ${test_name}() {
+        ${code_fragment}
+      }
+    ")
+    set(error_test_names_copy "${error_test_names}")
+    list(APPEND error_test_names_copy "${test_name}")
+    set(error_test_names "${error_test_names_copy}" PARENT_SCOPE)
+  else()
+    set(non_error_test_content "
+      ${non_error_test_content}
+      void ${test_name}() {
+        ${code_fragment}
+      }" PARENT_SCOPE)
+  endif()
+endfunction ()
+
+# Generates a source file for non-error test with `non_error_test_content` and
+# CMake project file with all error and single non-error test targets.
+function (run_tests)
+  set(cmake_targets "")
+  foreach(test_name IN LISTS error_test_names)
+    set(cmake_targets "
+      ${cmake_targets}
+      add_library(test-${test_name} ${test_name}.cc)
+      target_link_libraries(test-${test_name} PRIVATE fmt::fmt)
+    ")
+  endforeach()
+
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/non_error_test.cc" "
+    ${fmt_headers}
+    ${non_error_test_content}
+  ")
+  set(cmake_targets "
+    ${cmake_targets}
+    add_library(non-error-test non_error_test.cc)
+    target_link_libraries(non-error-test PRIVATE fmt::fmt)
+  ")
+
+  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/CMakeLists.txt" "
+    cmake_minimum_required(VERSION 3.1...3.18)
+    project(tests CXX)
+    add_subdirectory(${FMT_DIR} fmt)
+    ${cmake_targets}
+  ")
+
+  set(build_directory "${CMAKE_CURRENT_BINARY_DIR}/test/build")
+  file(MAKE_DIRECTORY "${build_directory}")
+  execute_process(
+    COMMAND
+      "${CMAKE_COMMAND}"
+      "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
+      "-DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}"
+      "-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}"
+      "-DCMAKE_GENERATOR=${CMAKE_GENERATOR}"
+      "-DCMAKE_MAKE_PROGRAM=${CMAKE_MAKE_PROGRAM}"
+      "-DFMT_DIR=${FMT_DIR}"
+      "${CMAKE_CURRENT_BINARY_DIR}/test"
+    WORKING_DIRECTORY "${build_directory}"
+    RESULT_VARIABLE result_var
+    OUTPUT_VARIABLE output_var
+    ERROR_VARIABLE output_var)
+  if (NOT result_var EQUAL 0)
+    message(FATAL_ERROR "Unable to configure:\n${output_var}")
+  endif()
+
+  foreach(test_name IN LISTS error_test_names)
+    execute_process(
+      COMMAND
+        "${CMAKE_COMMAND}" --build "${build_directory}" --target "test-${test_name}"
+      WORKING_DIRECTORY "${build_directory}"
+      RESULT_VARIABLE result_var
+      OUTPUT_VARIABLE output_var
+      ERROR_QUIET)
+    if (result_var EQUAL 0)
+      message(SEND_ERROR "No compile error for \"${test_name}\":\n${output_var}")
+    endif ()
+  endforeach()
+
+  execute_process(
+    COMMAND
+      "${CMAKE_COMMAND}" --build "${build_directory}" --target "non-error-test"
+    WORKING_DIRECTORY "${build_directory}"
+    RESULT_VARIABLE result_var
+    OUTPUT_VARIABLE output_var
+    ERROR_VARIABLE output_var)
+  if (NOT result_var EQUAL 0)
+    message(SEND_ERROR "Compile error for combined non-error test:\n${output_var}")
+  endif ()
+endfunction ()
+
+
+# check if the source file skeleton compiles
+expect_compile(check "")
+expect_compile(check-error "compilation_error" ERROR)
+
+# Formatting a wide character with a narrow format string is forbidden.
+expect_compile(wide-character-narrow-format-string "fmt::format(L\"{}\", L'a');")
+expect_compile(wide-character-narrow-format-string-error "fmt::format(\"{}\", L'a');" ERROR)
+
+# Formatting a wide string with a narrow format string is forbidden.
+expect_compile(wide-string-narrow-format-string "fmt::format(L\"{}\", L\"foo\");")
+expect_compile(wide-string-narrow-format-string-error "fmt::format(\"{}\", L\"foo\");" ERROR)
+
+# Formatting a narrow string with a wide format string is forbidden because
+# mixing UTF-8 with UTF-16/32 can result in an invalid output.
+expect_compile(narrow-string-wide-format-string "fmt::format(L\"{}\", L\"foo\");")
+expect_compile(narrow-string-wide-format-string-error "fmt::format(L\"{}\", \"foo\");" ERROR)
+
+expect_compile(cast-to-string "
+  struct S {
+    operator std::string() const { return std::string(); }
+  };
+  fmt::format(\"{}\", std::string(S()));
+")
+expect_compile(cast-to-string-error "
+  struct S {
+    operator std::string() const { return std::string(); }
+  };
+  fmt::format(\"{}\", S());
+" ERROR)
+
+# Formatting a function
+expect_compile(format-function "
+  void (*f)();
+  fmt::format(\"{}\", fmt::ptr(f));
+")
+expect_compile(format-function-error "
+  void (*f)();
+  fmt::format(\"{}\", f);
+" ERROR)
+
+# Make sure that compiler features detected in the header
+# match the features detected in CMake.
+if (SUPPORTS_USER_DEFINED_LITERALS)
+  set(supports_udl 1)
+else ()
+  set(supports_udl 0)
+endif ()
+expect_compile(udl-check "
+  #if FMT_USE_USER_DEFINED_LITERALS != ${supports_udl}
+  # error
+  #endif
+")
+
+if (CMAKE_CXX_STANDARD GREATER_EQUAL 20)
+  # Compile-time argument type check
+  expect_compile(format-string-number-spec "
+    #ifdef FMT_HAS_CONSTEVAL
+      fmt::format(\"{:d}\", 42);
+    #endif
+  ")
+  expect_compile(format-string-number-spec-error "
+    #ifdef FMT_HAS_CONSTEVAL
+      fmt::format(\"{:d}\", \"I am not a number\");
+    #else
+      #error
+    #endif
+  " ERROR)
+
+  # Compile-time argument name check
+  expect_compile(format-string-name "
+    #if defined(FMT_HAS_CONSTEVAL) && FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+      using namespace fmt::literals;
+      fmt::print(\"{foo}\", \"foo\"_a=42);
+    #endif
+  ")
+  expect_compile(format-string-name-error "
+    #if defined(FMT_HAS_CONSTEVAL) && FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+      using namespace fmt::literals;
+      fmt::print(\"{foo}\", \"bar\"_a=42);
+    #else
+      #error
+    #endif
+  " ERROR)
+endif ()
+
+# Run all tests
+run_tests()
diff --git a/3rdparty/fmt/test/compile-fp-test.cc b/3rdparty/fmt/test/compile-fp-test.cc
new file mode 100644
index 00000000..afedc26d
--- /dev/null
+++ b/3rdparty/fmt/test/compile-fp-test.cc
@@ -0,0 +1,62 @@
+// Formatting library for C++ - formatting library tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/compile.h"
+#include "gmock/gmock.h"
+
+#if defined(__cpp_lib_bit_cast) && __cpp_lib_bit_cast >= 201806 && \
+    defined(__cpp_constexpr) && __cpp_constexpr >= 201907 &&       \
+    defined(__cpp_constexpr_dynamic_alloc) &&                      \
+    __cpp_constexpr_dynamic_alloc >= 201907 && __cplusplus >= 202002L
+template <size_t max_string_length, typename Char = char> struct test_string {
+  template <typename T> constexpr bool operator==(const T& rhs) const noexcept {
+    return fmt::basic_string_view<Char>(rhs).compare(buffer) == 0;
+  }
+  Char buffer[max_string_length]{};
+};
+
+template <size_t max_string_length, typename Char = char, typename... Args>
+consteval auto test_format(auto format, const Args&... args) {
+  test_string<max_string_length, Char> string{};
+  fmt::format_to(string.buffer, format, args...);
+  return string;
+}
+
+TEST(compile_time_formatting_test, floating_point) {
+  EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{}"), 0.0f));
+  EXPECT_EQ("392.500000", test_format<11>(FMT_COMPILE("{0:f}"), 392.5f));
+
+  EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{:}"), 0.0));
+  EXPECT_EQ("0.000000", test_format<9>(FMT_COMPILE("{:f}"), 0.0));
+  EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{:g}"), 0.0));
+  EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:}"), 392.65));
+  EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:g}"), 392.65));
+  EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:G}"), 392.65));
+  EXPECT_EQ("4.9014e+06", test_format<11>(FMT_COMPILE("{:g}"), 4.9014e6));
+  EXPECT_EQ("-392.650000", test_format<12>(FMT_COMPILE("{:f}"), -392.65));
+  EXPECT_EQ("-392.650000", test_format<12>(FMT_COMPILE("{:F}"), -392.65));
+
+  EXPECT_EQ("3.926500e+02", test_format<13>(FMT_COMPILE("{0:e}"), 392.65));
+  EXPECT_EQ("3.926500E+02", test_format<13>(FMT_COMPILE("{0:E}"), 392.65));
+  EXPECT_EQ("+0000392.6", test_format<11>(FMT_COMPILE("{0:+010.4g}"), 392.65));
+  EXPECT_EQ("9223372036854775808.000000",
+            test_format<27>(FMT_COMPILE("{:f}"), 9223372036854775807.0));
+
+  constexpr double nan = std::numeric_limits<double>::quiet_NaN();
+  EXPECT_EQ("nan", test_format<4>(FMT_COMPILE("{}"), nan));
+  EXPECT_EQ("+nan", test_format<5>(FMT_COMPILE("{:+}"), nan));
+  if (std::signbit(-nan))
+    EXPECT_EQ("-nan", test_format<5>(FMT_COMPILE("{}"), -nan));
+  else
+    fmt::print("Warning: compiler doesn't handle negative NaN correctly");
+
+  constexpr double inf = std::numeric_limits<double>::infinity();
+  EXPECT_EQ("inf", test_format<4>(FMT_COMPILE("{}"), inf));
+  EXPECT_EQ("+inf", test_format<5>(FMT_COMPILE("{:+}"), inf));
+  EXPECT_EQ("-inf", test_format<5>(FMT_COMPILE("{}"), -inf));
+}
+#endif
diff --git a/3rdparty/fmt/test/compile-test.cc b/3rdparty/fmt/test/compile-test.cc
new file mode 100644
index 00000000..1765961b
--- /dev/null
+++ b/3rdparty/fmt/test/compile-test.cc
@@ -0,0 +1,376 @@
+// Formatting library for C++ - formatting library tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/compile.h"
+
+#include <type_traits>
+
+#include "fmt/chrono.h"
+#include "gmock/gmock.h"
+#include "gtest-extra.h"
+
+TEST(iterator_test, counting_iterator) {
+  auto it = fmt::detail::counting_iterator();
+  auto prev = it++;
+  EXPECT_EQ(prev.count(), 0);
+  EXPECT_EQ(it.count(), 1);
+  EXPECT_EQ((it + 41).count(), 42);
+}
+
+TEST(iterator_test, truncating_iterator) {
+  char* p = nullptr;
+  auto it = fmt::detail::truncating_iterator<char*>(p, 3);
+  auto prev = it++;
+  EXPECT_EQ(prev.base(), p);
+  EXPECT_EQ(it.base(), p + 1);
+}
+
+TEST(iterator_test, truncating_iterator_default_construct) {
+  auto it = fmt::detail::truncating_iterator<char*>();
+  EXPECT_EQ(nullptr, it.base());
+  EXPECT_EQ(std::size_t{0}, it.count());
+}
+
+#ifdef __cpp_lib_ranges
+TEST(iterator_test, truncating_iterator_is_output_iterator) {
+  static_assert(
+      std::output_iterator<fmt::detail::truncating_iterator<char*>, char>);
+}
+#endif
+
+TEST(iterator_test, truncating_back_inserter) {
+  auto buffer = std::string();
+  auto bi = std::back_inserter(buffer);
+  auto it = fmt::detail::truncating_iterator<decltype(bi)>(bi, 2);
+  *it++ = '4';
+  *it++ = '2';
+  *it++ = '1';
+  EXPECT_EQ(buffer.size(), 2);
+  EXPECT_EQ(buffer, "42");
+}
+
+TEST(compile_test, compile_fallback) {
+  // FMT_COMPILE should fallback on runtime formatting when `if constexpr` is
+  // not available.
+  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42));
+}
+
+struct type_with_get {
+  template <int> friend void get(type_with_get);
+};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<type_with_get> : formatter<int> {
+  template <typename FormatContext>
+  auto format(type_with_get, FormatContext& ctx) -> decltype(ctx.out()) {
+    return formatter<int>::format(42, ctx);
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(compile_test, compile_type_with_get) {
+  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), type_with_get()));
+}
+
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+struct test_formattable {};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<test_formattable> : formatter<const char*> {
+  char word_spec = 'f';
+  constexpr auto parse(format_parse_context& ctx) {
+    auto it = ctx.begin(), end = ctx.end();
+    if (it == end || *it == '}') return it;
+    if (it != end && (*it == 'f' || *it == 'b')) word_spec = *it++;
+    if (it != end && *it != '}') throw format_error("invalid format");
+    return it;
+  }
+  template <typename FormatContext>
+  constexpr auto format(test_formattable, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    return formatter<const char*>::format(word_spec == 'f' ? "foo" : "bar",
+                                          ctx);
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(compile_test, format_default) {
+  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42));
+  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42u));
+  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42ll));
+  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42ull));
+  EXPECT_EQ("true", fmt::format(FMT_COMPILE("{}"), true));
+  EXPECT_EQ("x", fmt::format(FMT_COMPILE("{}"), 'x'));
+  EXPECT_EQ("4.2", fmt::format(FMT_COMPILE("{}"), 4.2));
+  EXPECT_EQ("foo", fmt::format(FMT_COMPILE("{}"), "foo"));
+  EXPECT_EQ("foo", fmt::format(FMT_COMPILE("{}"), std::string("foo")));
+  EXPECT_EQ("foo", fmt::format(FMT_COMPILE("{}"), test_formattable()));
+  auto t = std::chrono::system_clock::now();
+  EXPECT_EQ(fmt::format("{}", t), fmt::format(FMT_COMPILE("{}"), t));
+#  ifdef __cpp_lib_byte
+  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), std::byte{42}));
+#  endif
+}
+
+TEST(compile_test, format_wide_string) {
+  EXPECT_EQ(L"42", fmt::format(FMT_COMPILE(L"{}"), 42));
+}
+
+TEST(compile_test, format_specs) {
+  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{:x}"), 0x42));
+  EXPECT_EQ("1.2 ms ",
+            fmt::format(FMT_COMPILE("{:7.1%Q %q}"),
+                        std::chrono::duration<double, std::milli>(1.234)));
+}
+
+TEST(compile_test, dynamic_format_specs) {
+  EXPECT_EQ("foo  ", fmt::format(FMT_COMPILE("{:{}}"), "foo", 5));
+  EXPECT_EQ("  3.14", fmt::format(FMT_COMPILE("{:{}.{}f}"), 3.141592, 6, 2));
+  EXPECT_EQ(
+      "=1.234ms=",
+      fmt::format(FMT_COMPILE("{:=^{}.{}}"),
+                  std::chrono::duration<double, std::milli>(1.234), 9, 3));
+}
+
+TEST(compile_test, manual_ordering) {
+  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{0}"), 42));
+  EXPECT_EQ(" -42", fmt::format(FMT_COMPILE("{0:4}"), -42));
+  EXPECT_EQ("41 43", fmt::format(FMT_COMPILE("{0} {1}"), 41, 43));
+  EXPECT_EQ("41 43", fmt::format(FMT_COMPILE("{1} {0}"), 43, 41));
+  EXPECT_EQ("41 43", fmt::format(FMT_COMPILE("{0} {2}"), 41, 42, 43));
+  EXPECT_EQ("  41   43", fmt::format(FMT_COMPILE("{1:{2}} {0:4}"), 43, 41, 4));
+  EXPECT_EQ("42 1.2 ms ",
+            fmt::format(FMT_COMPILE("{0} {1:7.1%Q %q}"), 42,
+                        std::chrono::duration<double, std::milli>(1.234)));
+  EXPECT_EQ(
+      "true 42 42 foo 0x1234 foo",
+      fmt::format(FMT_COMPILE("{0} {1} {2} {3} {4} {5}"), true, 42, 42.0f,
+                  "foo", reinterpret_cast<void*>(0x1234), test_formattable()));
+  EXPECT_EQ(L"42", fmt::format(FMT_COMPILE(L"{0}"), 42));
+}
+
+TEST(compile_test, named) {
+  auto runtime_named_field_compiled =
+      fmt::detail::compile<decltype(fmt::arg("arg", 42))>(FMT_COMPILE("{arg}"));
+  static_assert(std::is_same_v<decltype(runtime_named_field_compiled),
+                               fmt::detail::runtime_named_field<char>>);
+
+  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), fmt::arg("arg", 42)));
+  EXPECT_EQ("41 43", fmt::format(FMT_COMPILE("{} {}"), fmt::arg("arg", 41),
+                                 fmt::arg("arg", 43)));
+
+  EXPECT_EQ("foobar",
+            fmt::format(FMT_COMPILE("{a0}{a1}"), fmt::arg("a0", "foo"),
+                        fmt::arg("a1", "bar")));
+  EXPECT_EQ("foobar", fmt::format(FMT_COMPILE("{}{a1}"), fmt::arg("a0", "foo"),
+                                  fmt::arg("a1", "bar")));
+  EXPECT_EQ("foofoo", fmt::format(FMT_COMPILE("{a0}{}"), fmt::arg("a0", "foo"),
+                                  fmt::arg("a1", "bar")));
+  EXPECT_EQ("foobar", fmt::format(FMT_COMPILE("{0}{a1}"), fmt::arg("a0", "foo"),
+                                  fmt::arg("a1", "bar")));
+  EXPECT_EQ("foobar", fmt::format(FMT_COMPILE("{a0}{1}"), fmt::arg("a0", "foo"),
+                                  fmt::arg("a1", "bar")));
+
+  EXPECT_EQ("foobar",
+            fmt::format(FMT_COMPILE("{}{a1}"), "foo", fmt::arg("a1", "bar")));
+  EXPECT_EQ("foobar",
+            fmt::format(FMT_COMPILE("{a0}{a1}"), fmt::arg("a1", "bar"),
+                        fmt::arg("a2", "baz"), fmt::arg("a0", "foo")));
+  EXPECT_EQ(" bar foo ",
+            fmt::format(FMT_COMPILE(" {foo} {bar} "), fmt::arg("foo", "bar"),
+                        fmt::arg("bar", "foo")));
+
+  EXPECT_THROW(fmt::format(FMT_COMPILE("{invalid}"), fmt::arg("valid", 42)),
+               fmt::format_error);
+
+#  if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+  using namespace fmt::literals;
+  auto statically_named_field_compiled =
+      fmt::detail::compile<decltype("arg"_a = 42)>(FMT_COMPILE("{arg}"));
+  static_assert(std::is_same_v<decltype(statically_named_field_compiled),
+                               fmt::detail::field<char, int, 0>>);
+
+  EXPECT_EQ("41 43",
+            fmt::format(FMT_COMPILE("{a0} {a1}"), "a0"_a = 41, "a1"_a = 43));
+  EXPECT_EQ("41 43",
+            fmt::format(FMT_COMPILE("{a1} {a0}"), "a0"_a = 43, "a1"_a = 41));
+#  endif
+}
+
+TEST(compile_test, format_to) {
+  char buf[8];
+  auto end = fmt::format_to(buf, FMT_COMPILE("{}"), 42);
+  *end = '\0';
+  EXPECT_STREQ("42", buf);
+  end = fmt::format_to(buf, FMT_COMPILE("{:x}"), 42);
+  *end = '\0';
+  EXPECT_STREQ("2a", buf);
+}
+
+TEST(compile_test, format_to_n) {
+  constexpr auto buffer_size = 8;
+  char buffer[buffer_size];
+  auto res = fmt::format_to_n(buffer, buffer_size, FMT_COMPILE("{}"), 42);
+  *res.out = '\0';
+  EXPECT_STREQ("42", buffer);
+  res = fmt::format_to_n(buffer, buffer_size, FMT_COMPILE("{:x}"), 42);
+  *res.out = '\0';
+  EXPECT_STREQ("2a", buffer);
+}
+
+TEST(compile_test, formatted_size) {
+  EXPECT_EQ(2, fmt::formatted_size(FMT_COMPILE("{0}"), 42));
+  EXPECT_EQ(5, fmt::formatted_size(FMT_COMPILE("{0:<4.2f}"), 42.0));
+}
+
+TEST(compile_test, text_and_arg) {
+  EXPECT_EQ(">>>42<<<", fmt::format(FMT_COMPILE(">>>{}<<<"), 42));
+  EXPECT_EQ("42!", fmt::format(FMT_COMPILE("{}!"), 42));
+}
+
+TEST(compile_test, unknown_format_fallback) {
+  EXPECT_EQ(" 42 ",
+            fmt::format(FMT_COMPILE("{name:^4}"), fmt::arg("name", 42)));
+
+  std::vector<char> v;
+  fmt::format_to(std::back_inserter(v), FMT_COMPILE("{name:^4}"),
+                 fmt::arg("name", 42));
+  EXPECT_EQ(" 42 ", fmt::string_view(v.data(), v.size()));
+
+  char buffer[4];
+  auto result = fmt::format_to_n(buffer, 4, FMT_COMPILE("{name:^5}"),
+                                 fmt::arg("name", 42));
+  EXPECT_EQ(5u, result.size);
+  EXPECT_EQ(buffer + 4, result.out);
+  EXPECT_EQ(" 42 ", fmt::string_view(buffer, 4));
+}
+
+TEST(compile_test, empty) { EXPECT_EQ("", fmt::format(FMT_COMPILE(""))); }
+
+struct to_stringable {
+  friend fmt::string_view to_string_view(to_stringable) { return {}; }
+};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<to_stringable> {
+  auto parse(format_parse_context& ctx) const -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  template <typename FormatContext>
+  auto format(const to_stringable&, FormatContext& ctx) -> decltype(ctx.out()) {
+    return ctx.out();
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(compile_test, to_string_and_formatter) {
+  fmt::format(FMT_COMPILE("{}"), to_stringable());
+}
+
+TEST(compile_test, print) {
+  EXPECT_WRITE(stdout, fmt::print(FMT_COMPILE("Don't {}!"), "panic"),
+               "Don't panic!");
+  EXPECT_WRITE(stderr, fmt::print(stderr, FMT_COMPILE("Don't {}!"), "panic"),
+               "Don't panic!");
+}
+#endif
+
+#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+TEST(compile_test, compile_format_string_literal) {
+  using namespace fmt::literals;
+  EXPECT_EQ("", fmt::format(""_cf));
+  EXPECT_EQ("42", fmt::format("{}"_cf, 42));
+  EXPECT_EQ(L"42", fmt::format(L"{}"_cf, 42));
+}
+#endif
+
+#if __cplusplus >= 202002L || \
+    (__cplusplus >= 201709L && FMT_GCC_VERSION >= 1002)
+template <size_t max_string_length, typename Char = char> struct test_string {
+  template <typename T> constexpr bool operator==(const T& rhs) const noexcept {
+    return fmt::basic_string_view<Char>(rhs).compare(buffer) == 0;
+  }
+  Char buffer[max_string_length]{};
+};
+
+template <size_t max_string_length, typename Char = char, typename... Args>
+consteval auto test_format(auto format, const Args&... args) {
+  test_string<max_string_length, Char> string{};
+  fmt::format_to(string.buffer, format, args...);
+  return string;
+}
+
+TEST(compile_time_formatting_test, bool) {
+  EXPECT_EQ("true", test_format<5>(FMT_COMPILE("{}"), true));
+  EXPECT_EQ("false", test_format<6>(FMT_COMPILE("{}"), false));
+  EXPECT_EQ("true ", test_format<6>(FMT_COMPILE("{:5}"), true));
+  EXPECT_EQ("1", test_format<2>(FMT_COMPILE("{:d}"), true));
+}
+
+TEST(compile_time_formatting_test, integer) {
+  EXPECT_EQ("42", test_format<3>(FMT_COMPILE("{}"), 42));
+  EXPECT_EQ("420", test_format<4>(FMT_COMPILE("{}"), 420));
+  EXPECT_EQ("42 42", test_format<6>(FMT_COMPILE("{} {}"), 42, 42));
+  EXPECT_EQ("42 42",
+            test_format<6>(FMT_COMPILE("{} {}"), uint32_t{42}, uint64_t{42}));
+
+  EXPECT_EQ("+42", test_format<4>(FMT_COMPILE("{:+}"), 42));
+  EXPECT_EQ("42", test_format<3>(FMT_COMPILE("{:-}"), 42));
+  EXPECT_EQ(" 42", test_format<4>(FMT_COMPILE("{: }"), 42));
+
+  EXPECT_EQ("-0042", test_format<6>(FMT_COMPILE("{:05}"), -42));
+
+  EXPECT_EQ("101010", test_format<7>(FMT_COMPILE("{:b}"), 42));
+  EXPECT_EQ("0b101010", test_format<9>(FMT_COMPILE("{:#b}"), 42));
+  EXPECT_EQ("0B101010", test_format<9>(FMT_COMPILE("{:#B}"), 42));
+  EXPECT_EQ("042", test_format<4>(FMT_COMPILE("{:#o}"), 042));
+  EXPECT_EQ("0x4a", test_format<5>(FMT_COMPILE("{:#x}"), 0x4a));
+  EXPECT_EQ("0X4A", test_format<5>(FMT_COMPILE("{:#X}"), 0x4a));
+
+  EXPECT_EQ("   42", test_format<6>(FMT_COMPILE("{:5}"), 42));
+  EXPECT_EQ("   42", test_format<6>(FMT_COMPILE("{:5}"), 42ll));
+  EXPECT_EQ("   42", test_format<6>(FMT_COMPILE("{:5}"), 42ull));
+
+  EXPECT_EQ("42  ", test_format<5>(FMT_COMPILE("{:<4}"), 42));
+  EXPECT_EQ("  42", test_format<5>(FMT_COMPILE("{:>4}"), 42));
+  EXPECT_EQ(" 42 ", test_format<5>(FMT_COMPILE("{:^4}"), 42));
+  EXPECT_EQ("**-42", test_format<6>(FMT_COMPILE("{:*>5}"), -42));
+}
+
+TEST(compile_time_formatting_test, char) {
+  EXPECT_EQ("c", test_format<2>(FMT_COMPILE("{}"), 'c'));
+
+  EXPECT_EQ("c  ", test_format<4>(FMT_COMPILE("{:3}"), 'c'));
+  EXPECT_EQ("99", test_format<3>(FMT_COMPILE("{:d}"), 'c'));
+}
+
+TEST(compile_time_formatting_test, string) {
+  EXPECT_EQ("42", test_format<3>(FMT_COMPILE("{}"), "42"));
+  EXPECT_EQ("The answer is 42",
+            test_format<17>(FMT_COMPILE("{} is {}"), "The answer", "42"));
+
+  EXPECT_EQ("abc**", test_format<6>(FMT_COMPILE("{:*<5}"), "abc"));
+  EXPECT_EQ("**🤡**", test_format<9>(FMT_COMPILE("{:*^6}"), "🤡"));
+}
+
+TEST(compile_time_formatting_test, combination) {
+  EXPECT_EQ("420, true, answer",
+            test_format<18>(FMT_COMPILE("{}, {}, {}"), 420, true, "answer"));
+
+  EXPECT_EQ(" -42", test_format<5>(FMT_COMPILE("{:{}}"), -42, 4));
+}
+
+TEST(compile_time_formatting_test, custom_type) {
+  EXPECT_EQ("foo", test_format<4>(FMT_COMPILE("{}"), test_formattable()));
+  EXPECT_EQ("bar", test_format<4>(FMT_COMPILE("{:b}"), test_formattable()));
+}
+
+TEST(compile_time_formatting_test, multibyte_fill) {
+  EXPECT_EQ("жж42", test_format<8>(FMT_COMPILE("{:ж>4}"), 42));
+}
+#endif
diff --git a/3rdparty/fmt/test/core-test.cc b/3rdparty/fmt/test/core-test.cc
new file mode 100644
index 00000000..b2f2097e
--- /dev/null
+++ b/3rdparty/fmt/test/core-test.cc
@@ -0,0 +1,923 @@
+// Formatting library for C++ - core tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+// clang-format off
+#include "test-assert.h"
+// clang-format on
+
+#include "fmt/core.h"
+
+#include <algorithm>    // std::copy_n
+#include <climits>      // INT_MAX
+#include <cstring>      // std::strlen
+#include <functional>   // std::equal_to
+#include <iterator>     // std::back_insert_iterator
+#include <limits>       // std::numeric_limits
+#include <string>       // std::string
+#include <type_traits>  // std::is_same
+
+#include "gmock/gmock.h"
+
+using fmt::string_view;
+using fmt::detail::buffer;
+
+using testing::_;
+using testing::Invoke;
+using testing::Return;
+
+#ifdef FMT_FORMAT_H_
+#  error core-test includes format.h
+#endif
+
+TEST(string_view_test, value_type) {
+  static_assert(std::is_same<string_view::value_type, char>::value, "");
+}
+
+TEST(string_view_test, ctor) {
+  EXPECT_STREQ("abc", fmt::string_view("abc").data());
+  EXPECT_EQ(3u, fmt::string_view("abc").size());
+
+  EXPECT_STREQ("defg", fmt::string_view(std::string("defg")).data());
+  EXPECT_EQ(4u, fmt::string_view(std::string("defg")).size());
+}
+
+TEST(string_view_test, length) {
+  // Test that string_view::size() returns string length, not buffer size.
+  char str[100] = "some string";
+  EXPECT_EQ(std::strlen(str), string_view(str).size());
+  EXPECT_LT(std::strlen(str), sizeof(str));
+}
+
+// Check string_view's comparison operator.
+template <template <typename> class Op> void check_op() {
+  const char* inputs[] = {"foo", "fop", "fo"};
+  size_t num_inputs = sizeof(inputs) / sizeof(*inputs);
+  for (size_t i = 0; i < num_inputs; ++i) {
+    for (size_t j = 0; j < num_inputs; ++j) {
+      string_view lhs(inputs[i]), rhs(inputs[j]);
+      EXPECT_EQ(Op<int>()(lhs.compare(rhs), 0), Op<string_view>()(lhs, rhs));
+    }
+  }
+}
+
+TEST(string_view_test, compare) {
+  EXPECT_EQ(string_view("foo").compare(string_view("foo")), 0);
+  EXPECT_GT(string_view("fop").compare(string_view("foo")), 0);
+  EXPECT_LT(string_view("foo").compare(string_view("fop")), 0);
+  EXPECT_GT(string_view("foo").compare(string_view("fo")), 0);
+  EXPECT_LT(string_view("fo").compare(string_view("foo")), 0);
+  check_op<std::equal_to>();
+  check_op<std::not_equal_to>();
+  check_op<std::less>();
+  check_op<std::less_equal>();
+  check_op<std::greater>();
+  check_op<std::greater_equal>();
+}
+
+namespace test_ns {
+template <typename Char> class test_string {
+ private:
+  std::basic_string<Char> s_;
+
+ public:
+  test_string(const Char* s) : s_(s) {}
+  const Char* data() const { return s_.data(); }
+  size_t length() const { return s_.size(); }
+  operator const Char*() const { return s_.c_str(); }
+};
+
+template <typename Char>
+fmt::basic_string_view<Char> to_string_view(const test_string<Char>& s) {
+  return {s.data(), s.length()};
+}
+}  // namespace test_ns
+
+TEST(core_test, is_output_iterator) {
+  EXPECT_TRUE((fmt::detail::is_output_iterator<char*, char>::value));
+  EXPECT_FALSE((fmt::detail::is_output_iterator<const char*, char>::value));
+  EXPECT_FALSE((fmt::detail::is_output_iterator<std::string, char>::value));
+  EXPECT_TRUE(
+      (fmt::detail::is_output_iterator<std::back_insert_iterator<std::string>,
+                                       char>::value));
+  EXPECT_TRUE(
+      (fmt::detail::is_output_iterator<std::string::iterator, char>::value));
+  EXPECT_FALSE((fmt::detail::is_output_iterator<std::string::const_iterator,
+                                                char>::value));
+}
+
+TEST(core_test, buffer_appender) {
+  // back_insert_iterator is not default-constructible before C++20, so
+  // buffer_appender can only be default-constructible when back_insert_iterator
+  // is.
+  static_assert(
+      std::is_default_constructible<
+          std::back_insert_iterator<fmt::detail::buffer<char>>>::value ==
+          std::is_default_constructible<
+              fmt::detail::buffer_appender<char>>::value,
+      "");
+
+#ifdef __cpp_lib_ranges
+  static_assert(std::output_iterator<fmt::detail::buffer_appender<char>, char>);
+#endif
+}
+
+#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 470
+TEST(buffer_test, noncopyable) {
+  EXPECT_FALSE(std::is_copy_constructible<buffer<char>>::value);
+#  if !FMT_MSC_VER
+  // std::is_copy_assignable is broken in MSVC2013.
+  EXPECT_FALSE(std::is_copy_assignable<buffer<char>>::value);
+#  endif
+}
+
+TEST(buffer_test, nonmoveable) {
+  EXPECT_FALSE(std::is_move_constructible<buffer<char>>::value);
+#  if !FMT_MSC_VER
+  // std::is_move_assignable is broken in MSVC2013.
+  EXPECT_FALSE(std::is_move_assignable<buffer<char>>::value);
+#  endif
+}
+#endif
+
+TEST(buffer_test, indestructible) {
+  static_assert(!std::is_destructible<fmt::detail::buffer<int>>(),
+                "buffer's destructor is protected");
+}
+
+template <typename T> struct mock_buffer final : buffer<T> {
+  MOCK_METHOD1(do_grow, size_t(size_t capacity));
+
+  void grow(size_t capacity) override {
+    this->set(this->data(), do_grow(capacity));
+  }
+
+  mock_buffer(T* data = nullptr, size_t buf_capacity = 0) {
+    this->set(data, buf_capacity);
+    ON_CALL(*this, do_grow(_)).WillByDefault(Invoke([](size_t capacity) {
+      return capacity;
+    }));
+  }
+};
+
+TEST(buffer_test, ctor) {
+  {
+    mock_buffer<int> buffer;
+    EXPECT_EQ(nullptr, buffer.data());
+    EXPECT_EQ(static_cast<size_t>(0), buffer.size());
+    EXPECT_EQ(static_cast<size_t>(0), buffer.capacity());
+  }
+  {
+    int dummy;
+    mock_buffer<int> buffer(&dummy);
+    EXPECT_EQ(&dummy, &buffer[0]);
+    EXPECT_EQ(static_cast<size_t>(0), buffer.size());
+    EXPECT_EQ(static_cast<size_t>(0), buffer.capacity());
+  }
+  {
+    int dummy;
+    size_t capacity = std::numeric_limits<size_t>::max();
+    mock_buffer<int> buffer(&dummy, capacity);
+    EXPECT_EQ(&dummy, &buffer[0]);
+    EXPECT_EQ(static_cast<size_t>(0), buffer.size());
+    EXPECT_EQ(capacity, buffer.capacity());
+  }
+}
+
+TEST(buffer_test, access) {
+  char data[10];
+  mock_buffer<char> buffer(data, sizeof(data));
+  buffer[0] = 11;
+  EXPECT_EQ(11, buffer[0]);
+  buffer[3] = 42;
+  EXPECT_EQ(42, *(&buffer[0] + 3));
+  const fmt::detail::buffer<char>& const_buffer = buffer;
+  EXPECT_EQ(42, const_buffer[3]);
+}
+
+TEST(buffer_test, try_resize) {
+  char data[123];
+  mock_buffer<char> buffer(data, sizeof(data));
+  buffer[10] = 42;
+  EXPECT_EQ(42, buffer[10]);
+  buffer.try_resize(20);
+  EXPECT_EQ(20u, buffer.size());
+  EXPECT_EQ(123u, buffer.capacity());
+  EXPECT_EQ(42, buffer[10]);
+  buffer.try_resize(5);
+  EXPECT_EQ(5u, buffer.size());
+  EXPECT_EQ(123u, buffer.capacity());
+  EXPECT_EQ(42, buffer[10]);
+  // Check if try_resize calls grow.
+  EXPECT_CALL(buffer, do_grow(124));
+  buffer.try_resize(124);
+  EXPECT_CALL(buffer, do_grow(200));
+  buffer.try_resize(200);
+}
+
+TEST(buffer_test, try_resize_partial) {
+  char data[10];
+  mock_buffer<char> buffer(data, sizeof(data));
+  EXPECT_CALL(buffer, do_grow(20)).WillOnce(Return(15));
+  buffer.try_resize(20);
+  EXPECT_EQ(buffer.capacity(), 15);
+  EXPECT_EQ(buffer.size(), 15);
+}
+
+TEST(buffer_test, clear) {
+  mock_buffer<char> buffer;
+  EXPECT_CALL(buffer, do_grow(20));
+  buffer.try_resize(20);
+  buffer.try_resize(0);
+  EXPECT_EQ(static_cast<size_t>(0), buffer.size());
+  EXPECT_EQ(20u, buffer.capacity());
+}
+
+TEST(buffer_test, append) {
+  char data[15];
+  mock_buffer<char> buffer(data, 10);
+  auto test = "test";
+  buffer.append(test, test + 5);
+  EXPECT_STREQ(test, &buffer[0]);
+  EXPECT_EQ(5u, buffer.size());
+  buffer.try_resize(10);
+  EXPECT_CALL(buffer, do_grow(12));
+  buffer.append(test, test + 2);
+  EXPECT_EQ('t', buffer[10]);
+  EXPECT_EQ('e', buffer[11]);
+  EXPECT_EQ(12u, buffer.size());
+}
+
+TEST(buffer_test, append_partial) {
+  char data[10];
+  mock_buffer<char> buffer(data, sizeof(data));
+  testing::InSequence seq;
+  EXPECT_CALL(buffer, do_grow(15)).WillOnce(Return(10));
+  EXPECT_CALL(buffer, do_grow(15)).WillOnce(Invoke([&buffer](size_t) {
+    EXPECT_EQ(fmt::string_view(buffer.data(), buffer.size()), "0123456789");
+    buffer.clear();
+    return 10;
+  }));
+  auto test = "0123456789abcde";
+  buffer.append(test, test + 15);
+}
+
+TEST(buffer_test, append_allocates_enough_storage) {
+  char data[19];
+  mock_buffer<char> buffer(data, 10);
+  auto test = "abcdefgh";
+  buffer.try_resize(10);
+  EXPECT_CALL(buffer, do_grow(19));
+  buffer.append(test, test + 9);
+}
+
+struct custom_context {
+  using char_type = char;
+  using parse_context_type = fmt::format_parse_context;
+
+  bool called = false;
+
+  template <typename T> struct formatter_type {
+    auto parse(fmt::format_parse_context& ctx) -> decltype(ctx.begin()) {
+      return ctx.begin();
+    }
+
+    const char* format(const T&, custom_context& ctx) {
+      ctx.called = true;
+      return nullptr;
+    }
+  };
+
+  void advance_to(const char*) {}
+};
+
+struct test_struct {};
+
+FMT_BEGIN_NAMESPACE
+template <typename Char> struct formatter<test_struct, Char> {
+  auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  auto format(test_struct, format_context& ctx) -> decltype(ctx.out()) {
+    auto test = string_view("test");
+    return std::copy_n(test.data(), test.size(), ctx.out());
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(arg_test, format_args) {
+  auto args = fmt::format_args();
+  EXPECT_FALSE(args.get(1));
+}
+
+TEST(arg_test, make_value_with_custom_context) {
+  auto t = test_struct();
+  fmt::detail::value<custom_context> arg(
+      fmt::detail::arg_mapper<custom_context>().map(t));
+  auto ctx = custom_context();
+  auto parse_ctx = fmt::format_parse_context("");
+  arg.custom.format(&t, parse_ctx, ctx);
+  EXPECT_TRUE(ctx.called);
+}
+
+// Use a unique result type to make sure that there are no undesirable
+// conversions.
+struct test_result {};
+
+template <typename T> struct mock_visitor {
+  template <typename U> struct result { using type = test_result; };
+
+  mock_visitor() {
+    ON_CALL(*this, visit(_)).WillByDefault(Return(test_result()));
+  }
+
+  MOCK_METHOD1_T(visit, test_result(T value));
+  MOCK_METHOD0_T(unexpected, void());
+
+  test_result operator()(T value) { return visit(value); }
+
+  template <typename U> test_result operator()(U) {
+    unexpected();
+    return test_result();
+  }
+};
+
+template <typename T> struct visit_type { using type = T; };
+
+#define VISIT_TYPE(type_, visit_type_) \
+  template <> struct visit_type<type_> { using type = visit_type_; }
+
+VISIT_TYPE(signed char, int);
+VISIT_TYPE(unsigned char, unsigned);
+VISIT_TYPE(short, int);
+VISIT_TYPE(unsigned short, unsigned);
+
+#if LONG_MAX == INT_MAX
+VISIT_TYPE(long, int);
+VISIT_TYPE(unsigned long, unsigned);
+#else
+VISIT_TYPE(long, long long);
+VISIT_TYPE(unsigned long, unsigned long long);
+#endif
+
+#define CHECK_ARG(Char, expected, value)                                  \
+  {                                                                       \
+    testing::StrictMock<mock_visitor<decltype(expected)>> visitor;        \
+    EXPECT_CALL(visitor, visit(expected));                                \
+    using iterator = std::back_insert_iterator<buffer<Char>>;             \
+    fmt::visit_format_arg(                                                \
+        visitor,                                                          \
+        fmt::detail::make_arg<fmt::basic_format_context<iterator, Char>>( \
+            value));                                                      \
+  }
+
+#define CHECK_ARG_SIMPLE(value)                             \
+  {                                                         \
+    using value_type = decltype(value);                     \
+    typename visit_type<value_type>::type expected = value; \
+    CHECK_ARG(char, expected, value)                        \
+    CHECK_ARG(wchar_t, expected, value)                     \
+  }
+
+template <typename T> class numeric_arg_test : public testing::Test {};
+
+using types =
+    testing::Types<bool, signed char, unsigned char, short, unsigned short, int,
+                   unsigned, long, unsigned long, long long, unsigned long long,
+                   float, double, long double>;
+TYPED_TEST_SUITE(numeric_arg_test, types);
+
+template <typename T, fmt::enable_if_t<std::is_integral<T>::value, int> = 0>
+T test_value() {
+  return static_cast<T>(42);
+}
+
+template <typename T,
+          fmt::enable_if_t<std::is_floating_point<T>::value, int> = 0>
+T test_value() {
+  return static_cast<T>(4.2);
+}
+
+TYPED_TEST(numeric_arg_test, make_and_visit) {
+  CHECK_ARG_SIMPLE(test_value<TypeParam>());
+  CHECK_ARG_SIMPLE(std::numeric_limits<TypeParam>::min());
+  CHECK_ARG_SIMPLE(std::numeric_limits<TypeParam>::max());
+}
+
+TEST(arg_test, char_arg) { CHECK_ARG(char, 'a', 'a'); }
+
+TEST(arg_test, string_arg) {
+  char str_data[] = "test";
+  char* str = str_data;
+  const char* cstr = str;
+  CHECK_ARG(char, cstr, str);
+
+  auto sv = fmt::string_view(str);
+  CHECK_ARG(char, sv, std::string(str));
+}
+
+TEST(arg_test, wstring_arg) {
+  wchar_t str_data[] = L"test";
+  wchar_t* str = str_data;
+  const wchar_t* cstr = str;
+
+  auto sv = fmt::basic_string_view<wchar_t>(str);
+  CHECK_ARG(wchar_t, cstr, str);
+  CHECK_ARG(wchar_t, cstr, cstr);
+  CHECK_ARG(wchar_t, sv, std::wstring(str));
+  CHECK_ARG(wchar_t, sv, fmt::basic_string_view<wchar_t>(str));
+}
+
+TEST(arg_test, pointer_arg) {
+  void* p = nullptr;
+  const void* cp = nullptr;
+  CHECK_ARG(char, cp, p);
+  CHECK_ARG(wchar_t, cp, p);
+  CHECK_ARG_SIMPLE(cp);
+}
+
+struct check_custom {
+  test_result operator()(
+      fmt::basic_format_arg<fmt::format_context>::handle h) const {
+    struct test_buffer final : fmt::detail::buffer<char> {
+      char data[10];
+      test_buffer() : fmt::detail::buffer<char>(data, 0, 10) {}
+      void grow(size_t) override {}
+    } buffer;
+    auto parse_ctx = fmt::format_parse_context("");
+    auto ctx = fmt::format_context(fmt::detail::buffer_appender<char>(buffer),
+                                   fmt::format_args());
+    h.format(parse_ctx, ctx);
+    EXPECT_EQ("test", std::string(buffer.data, buffer.size()));
+    return test_result();
+  }
+};
+
+TEST(arg_test, custom_arg) {
+  auto test = test_struct();
+  using visitor =
+      mock_visitor<fmt::basic_format_arg<fmt::format_context>::handle>;
+  testing::StrictMock<visitor> v;
+  EXPECT_CALL(v, visit(_)).WillOnce(Invoke(check_custom()));
+  fmt::visit_format_arg(v, fmt::detail::make_arg<fmt::format_context>(test));
+}
+
+TEST(arg_test, visit_invalid_arg) {
+  testing::StrictMock<mock_visitor<fmt::monostate>> visitor;
+  EXPECT_CALL(visitor, visit(_));
+  auto arg = fmt::basic_format_arg<fmt::format_context>();
+  fmt::visit_format_arg(visitor, arg);
+}
+
+#if FMT_USE_CONSTEXPR
+
+enum class arg_id_result { none, empty, index, name, error };
+struct test_arg_id_handler {
+  arg_id_result res = arg_id_result::none;
+  int index = 0;
+  string_view name;
+
+  constexpr void operator()() { res = arg_id_result::empty; }
+
+  constexpr void operator()(int i) {
+    res = arg_id_result::index;
+    index = i;
+  }
+
+  constexpr void operator()(string_view n) {
+    res = arg_id_result::name;
+    name = n;
+  }
+
+  constexpr void on_error(const char*) { res = arg_id_result::error; }
+};
+
+template <size_t N>
+constexpr test_arg_id_handler parse_arg_id(const char (&s)[N]) {
+  test_arg_id_handler h;
+  fmt::detail::parse_arg_id(s, s + N, h);
+  return h;
+}
+
+TEST(format_test, constexpr_parse_arg_id) {
+  static_assert(parse_arg_id(":").res == arg_id_result::empty, "");
+  static_assert(parse_arg_id("}").res == arg_id_result::empty, "");
+  static_assert(parse_arg_id("42:").res == arg_id_result::index, "");
+  static_assert(parse_arg_id("42:").index == 42, "");
+  static_assert(parse_arg_id("foo:").res == arg_id_result::name, "");
+  static_assert(parse_arg_id("foo:").name.size() == 3, "");
+  static_assert(parse_arg_id("!").res == arg_id_result::error, "");
+}
+
+struct test_format_specs_handler {
+  enum result { none, hash, zero, loc, error };
+  result res = none;
+
+  fmt::align_t alignment = fmt::align::none;
+  fmt::sign_t sign = fmt::sign::none;
+  char fill = 0;
+  int width = 0;
+  fmt::detail::arg_ref<char> width_ref;
+  int precision = 0;
+  fmt::detail::arg_ref<char> precision_ref;
+  fmt::presentation_type type = fmt::presentation_type::none;
+
+  // Workaround for MSVC2017 bug that results in "expression did not evaluate
+  // to a constant" with compiler-generated copy ctor.
+  constexpr test_format_specs_handler() {}
+  constexpr test_format_specs_handler(const test_format_specs_handler& other) =
+      default;
+
+  constexpr void on_align(fmt::align_t a) { alignment = a; }
+  constexpr void on_fill(fmt::string_view f) { fill = f[0]; }
+  constexpr void on_sign(fmt::sign_t s) { sign = s; }
+  constexpr void on_hash() { res = hash; }
+  constexpr void on_zero() { res = zero; }
+  constexpr void on_localized() { res = loc; }
+
+  constexpr void on_width(int w) { width = w; }
+  constexpr void on_dynamic_width(fmt::detail::auto_id) {}
+  constexpr void on_dynamic_width(int index) { width_ref = index; }
+  constexpr void on_dynamic_width(string_view) {}
+
+  constexpr void on_precision(int p) { precision = p; }
+  constexpr void on_dynamic_precision(fmt::detail::auto_id) {}
+  constexpr void on_dynamic_precision(int index) { precision_ref = index; }
+  constexpr void on_dynamic_precision(string_view) {}
+
+  constexpr void end_precision() {}
+  constexpr void on_type(fmt::presentation_type t) { type = t; }
+  constexpr void on_error(const char*) { res = error; }
+};
+
+template <size_t N>
+constexpr test_format_specs_handler parse_test_specs(const char (&s)[N]) {
+  auto h = test_format_specs_handler();
+  fmt::detail::parse_format_specs(s, s + N - 1, h);
+  return h;
+}
+
+TEST(core_test, constexpr_parse_format_specs) {
+  using handler = test_format_specs_handler;
+  static_assert(parse_test_specs("<").alignment == fmt::align::left, "");
+  static_assert(parse_test_specs("*^").fill == '*', "");
+  static_assert(parse_test_specs("+").sign == fmt::sign::plus, "");
+  static_assert(parse_test_specs("-").sign == fmt::sign::minus, "");
+  static_assert(parse_test_specs(" ").sign == fmt::sign::space, "");
+  static_assert(parse_test_specs("#").res == handler::hash, "");
+  static_assert(parse_test_specs("0").res == handler::zero, "");
+  static_assert(parse_test_specs("L").res == handler::loc, "");
+  static_assert(parse_test_specs("42").width == 42, "");
+  static_assert(parse_test_specs("{42}").width_ref.val.index == 42, "");
+  static_assert(parse_test_specs(".42").precision == 42, "");
+  static_assert(parse_test_specs(".{42}").precision_ref.val.index == 42, "");
+  static_assert(parse_test_specs("d").type == fmt::presentation_type::dec, "");
+  static_assert(parse_test_specs("{<").res == handler::error, "");
+}
+
+struct test_parse_context {
+  using char_type = char;
+
+  constexpr int next_arg_id() { return 11; }
+  template <typename Id> FMT_CONSTEXPR void check_arg_id(Id) {}
+
+  constexpr const char* begin() { return nullptr; }
+  constexpr const char* end() { return nullptr; }
+
+  void on_error(const char*) {}
+};
+
+template <size_t N>
+constexpr fmt::detail::dynamic_format_specs<char> parse_dynamic_specs(
+    const char (&s)[N]) {
+  auto specs = fmt::detail::dynamic_format_specs<char>();
+  auto ctx = test_parse_context();
+  auto h = fmt::detail::dynamic_specs_handler<test_parse_context>(specs, ctx);
+  parse_format_specs(s, s + N - 1, h);
+  return specs;
+}
+
+TEST(format_test, constexpr_dynamic_specs_handler) {
+  static_assert(parse_dynamic_specs("<").align == fmt::align::left, "");
+  static_assert(parse_dynamic_specs("*^").fill[0] == '*', "");
+  static_assert(parse_dynamic_specs("+").sign == fmt::sign::plus, "");
+  static_assert(parse_dynamic_specs("-").sign == fmt::sign::minus, "");
+  static_assert(parse_dynamic_specs(" ").sign == fmt::sign::space, "");
+  static_assert(parse_dynamic_specs("#").alt, "");
+  static_assert(parse_dynamic_specs("0").align == fmt::align::numeric, "");
+  static_assert(parse_dynamic_specs("42").width == 42, "");
+  static_assert(parse_dynamic_specs("{}").width_ref.val.index == 11, "");
+  static_assert(parse_dynamic_specs("{42}").width_ref.val.index == 42, "");
+  static_assert(parse_dynamic_specs(".42").precision == 42, "");
+  static_assert(parse_dynamic_specs(".{}").precision_ref.val.index == 11, "");
+  static_assert(parse_dynamic_specs(".{42}").precision_ref.val.index == 42, "");
+  static_assert(parse_dynamic_specs("d").type == fmt::presentation_type::dec,
+                "");
+}
+
+template <size_t N>
+constexpr test_format_specs_handler check_specs(const char (&s)[N]) {
+  fmt::detail::specs_checker<test_format_specs_handler> checker(
+      test_format_specs_handler(), fmt::detail::type::double_type);
+  parse_format_specs(s, s + N - 1, checker);
+  return checker;
+}
+
+TEST(format_test, constexpr_specs_checker) {
+  using handler = test_format_specs_handler;
+  static_assert(check_specs("<").alignment == fmt::align::left, "");
+  static_assert(check_specs("*^").fill == '*', "");
+  static_assert(check_specs("+").sign == fmt::sign::plus, "");
+  static_assert(check_specs("-").sign == fmt::sign::minus, "");
+  static_assert(check_specs(" ").sign == fmt::sign::space, "");
+  static_assert(check_specs("#").res == handler::hash, "");
+  static_assert(check_specs("0").res == handler::zero, "");
+  static_assert(check_specs("42").width == 42, "");
+  static_assert(check_specs("{42}").width_ref.val.index == 42, "");
+  static_assert(check_specs(".42").precision == 42, "");
+  static_assert(check_specs(".{42}").precision_ref.val.index == 42, "");
+  static_assert(check_specs("d").type == fmt::presentation_type::dec, "");
+  static_assert(check_specs("{<").res == handler::error, "");
+}
+
+struct test_format_string_handler {
+  constexpr void on_text(const char*, const char*) {}
+
+  constexpr int on_arg_id() { return 0; }
+
+  template <typename T> constexpr int on_arg_id(T) { return 0; }
+
+  constexpr void on_replacement_field(int, const char*) {}
+
+  constexpr const char* on_format_specs(int, const char* begin, const char*) {
+    return begin;
+  }
+
+  constexpr void on_error(const char*) { error = true; }
+
+  bool error = false;
+};
+
+template <size_t N> constexpr bool parse_string(const char (&s)[N]) {
+  auto h = test_format_string_handler();
+  fmt::detail::parse_format_string<true>(fmt::string_view(s, N - 1), h);
+  return !h.error;
+}
+
+TEST(format_test, constexpr_parse_format_string) {
+  static_assert(parse_string("foo"), "");
+  static_assert(!parse_string("}"), "");
+  static_assert(parse_string("{}"), "");
+  static_assert(parse_string("{42}"), "");
+  static_assert(parse_string("{foo}"), "");
+  static_assert(parse_string("{:}"), "");
+}
+#endif  // FMT_USE_CONSTEXPR
+
+struct enabled_formatter {};
+struct disabled_formatter {};
+struct disabled_formatter_convertible {
+  operator int() const { return 42; }
+};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<enabled_formatter> {
+  auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+  auto format(enabled_formatter, format_context& ctx) -> decltype(ctx.out()) {
+    return ctx.out();
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(core_test, has_formatter) {
+  using fmt::has_formatter;
+  using context = fmt::format_context;
+  static_assert(has_formatter<enabled_formatter, context>::value, "");
+  static_assert(!has_formatter<disabled_formatter, context>::value, "");
+  static_assert(!has_formatter<disabled_formatter_convertible, context>::value,
+                "");
+}
+
+struct const_formattable {};
+struct nonconst_formattable {};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<const_formattable> {
+  auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  auto format(const const_formattable&, format_context& ctx)
+      -> decltype(ctx.out()) {
+    auto test = string_view("test");
+    return std::copy_n(test.data(), test.size(), ctx.out());
+  }
+};
+
+template <> struct formatter<nonconst_formattable> {
+  auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  auto format(nonconst_formattable&, format_context& ctx)
+      -> decltype(ctx.out()) {
+    auto test = string_view("test");
+    return std::copy_n(test.data(), test.size(), ctx.out());
+  }
+};
+FMT_END_NAMESPACE
+
+struct convertible_to_pointer {
+  operator const int*() const { return nullptr; }
+};
+
+enum class test_scoped_enum {};
+
+TEST(core_test, is_formattable) {
+#if 0
+  // This should be enabled once corresponding map overloads are gone.
+  static_assert(fmt::is_formattable<signed char*>::value, "");
+  static_assert(fmt::is_formattable<unsigned char*>::value, "");
+  static_assert(fmt::is_formattable<const signed char*>::value, "");
+  static_assert(fmt::is_formattable<const unsigned char*>::value, "");
+#endif
+  static_assert(!fmt::is_formattable<wchar_t>::value, "");
+#ifdef __cpp_char8_t
+  static_assert(!fmt::is_formattable<char8_t>::value, "");
+#endif
+  static_assert(!fmt::is_formattable<char16_t>::value, "");
+  static_assert(!fmt::is_formattable<char32_t>::value, "");
+  static_assert(!fmt::is_formattable<const wchar_t*>::value, "");
+  static_assert(!fmt::is_formattable<const wchar_t[3]>::value, "");
+  static_assert(!fmt::is_formattable<fmt::basic_string_view<wchar_t>>::value,
+                "");
+  static_assert(fmt::is_formattable<enabled_formatter>::value, "");
+  static_assert(!fmt::is_formattable<disabled_formatter>::value, "");
+  static_assert(fmt::is_formattable<disabled_formatter_convertible>::value, "");
+
+  static_assert(fmt::is_formattable<const_formattable&>::value, "");
+  static_assert(fmt::is_formattable<const const_formattable&>::value, "");
+
+  static_assert(fmt::is_formattable<nonconst_formattable&>::value, "");
+#if !FMT_MSC_VER || FMT_MSC_VER >= 1910
+  static_assert(!fmt::is_formattable<const nonconst_formattable&>::value, "");
+#endif
+
+  static_assert(!fmt::is_formattable<convertible_to_pointer>::value, "");
+
+  static_assert(!fmt::is_formattable<void (*)()>::value, "");
+
+  struct s;
+
+  static_assert(!fmt::is_formattable<int(s::*)>::value, "");
+  static_assert(!fmt::is_formattable<int (s::*)()>::value, "");
+  static_assert(!fmt::is_formattable<test_scoped_enum>::value, "");
+}
+
+TEST(core_test, format) { EXPECT_EQ(fmt::format("{}", 42), "42"); }
+
+TEST(core_test, format_to) {
+  std::string s;
+  fmt::format_to(std::back_inserter(s), "{}", 42);
+  EXPECT_EQ(s, "42");
+}
+
+struct convertible_to_int {
+  operator int() const { return 42; }
+};
+
+struct convertible_to_c_string {
+  operator const char*() const { return "foo"; }
+};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<convertible_to_int> {
+  auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+  auto format(convertible_to_int, format_context& ctx) -> decltype(ctx.out()) {
+    return std::copy_n("foo", 3, ctx.out());
+  }
+};
+
+template <> struct formatter<convertible_to_c_string> {
+  FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+  auto format(convertible_to_c_string, format_context& ctx)
+      -> decltype(ctx.out()) {
+    return std::copy_n("bar", 3, ctx.out());
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(core_test, formatter_overrides_implicit_conversion) {
+  EXPECT_EQ(fmt::format("{}", convertible_to_int()), "foo");
+  EXPECT_EQ(fmt::format("{}", convertible_to_c_string()), "bar");
+}
+
+// Test that check is not found by ADL.
+template <typename T> void check(T);
+TEST(core_test, adl_check) {
+  EXPECT_EQ(fmt::format("{}", test_struct()), "test");
+}
+
+TEST(core_test, to_string_view_foreign_strings) {
+  using namespace test_ns;
+  EXPECT_EQ(to_string_view(test_string<char>("42")), "42");
+  fmt::detail::type type =
+      fmt::detail::mapped_type_constant<test_string<char>,
+                                        fmt::format_context>::value;
+  EXPECT_EQ(type, fmt::detail::type::string_type);
+}
+
+struct implicitly_convertible_to_string {
+  operator std::string() const { return "foo"; }
+};
+
+struct implicitly_convertible_to_string_view {
+  operator fmt::string_view() const { return "foo"; }
+};
+
+TEST(core_test, format_implicitly_convertible_to_string_view) {
+  EXPECT_EQ("foo", fmt::format("{}", implicitly_convertible_to_string_view()));
+}
+
+// std::is_constructible is broken in MSVC until version 2015.
+#if !FMT_MSC_VER || FMT_MSC_VER >= 1900
+struct explicitly_convertible_to_string_view {
+  explicit operator fmt::string_view() const { return "foo"; }
+};
+
+TEST(core_test, format_explicitly_convertible_to_string_view) {
+  EXPECT_EQ("foo", fmt::format("{}", explicitly_convertible_to_string_view()));
+}
+
+#  ifdef FMT_USE_STRING_VIEW
+struct explicitly_convertible_to_std_string_view {
+  explicit operator std::string_view() const { return "foo"; }
+};
+
+TEST(core_test, format_explicitly_convertible_to_std_string_view) {
+  EXPECT_EQ("foo",
+            fmt::format("{}", explicitly_convertible_to_std_string_view()));
+}
+#  endif
+#endif
+
+struct convertible_to_long_long {
+  operator long long() const { return 1LL << 32; }
+};
+
+TEST(format_test, format_convertible_to_long_long) {
+  EXPECT_EQ("100000000", fmt::format("{:x}", convertible_to_long_long()));
+}
+
+struct disabled_rvalue_conversion {
+  operator const char*() const& { return "foo"; }
+  operator const char*() & { return "foo"; }
+  operator const char*() const&& = delete;
+  operator const char*() && = delete;
+};
+
+TEST(core_test, disabled_rvalue_conversion) {
+  EXPECT_EQ("foo", fmt::format("{}", disabled_rvalue_conversion()));
+}
+
+namespace adl_test {
+template <typename... T> void make_format_args(const T&...) = delete;
+
+struct string : std::string {};
+}  // namespace adl_test
+
+// Test that formatting functions compile when make_format_args is found by ADL.
+TEST(core_test, adl) {
+  // Only check compilation and don't run the code to avoid polluting the output
+  // and since the output is tested elsewhere.
+  if (fmt::detail::const_check(true)) return;
+  auto s = adl_test::string();
+  char buf[10];
+  (void)fmt::format("{}", s);
+  fmt::format_to(buf, "{}", s);
+  fmt::format_to_n(buf, 10, "{}", s);
+  (void)fmt::formatted_size("{}", s);
+  fmt::print("{}", s);
+  fmt::print(stdout, "{}", s);
+}
+
+TEST(core_test, has_const_formatter) {
+  EXPECT_TRUE((fmt::detail::has_const_formatter<const_formattable,
+                                                fmt::format_context>()));
+  EXPECT_FALSE((fmt::detail::has_const_formatter<nonconst_formattable,
+                                                 fmt::format_context>()));
+}
+
+TEST(core_test, format_nonconst) {
+  EXPECT_EQ(fmt::format("{}", nonconst_formattable()), "test");
+}
diff --git a/3rdparty/fmt/test/cuda-test/CMakeLists.txt b/3rdparty/fmt/test/cuda-test/CMakeLists.txt
new file mode 100644
index 00000000..be8685b8
--- /dev/null
+++ b/3rdparty/fmt/test/cuda-test/CMakeLists.txt
@@ -0,0 +1,73 @@
+# We can find some usecases which follow the guide of CMake which uses
+# `enable_language(CUDA)` instead of `find_package(CUDA)` and let the CMake
+# built-in functions use NVCC.
+
+# See: https://cmake.org/cmake/help/latest/module/FindCUDA.html#replacement
+#
+# However, this requires CMake version 3.10 or higher and we can't be sure most
+# of the CUDA projects are using those.
+#
+# This test relies on `find_package(CUDA)` in the parent CMake config.
+
+# These can be updated when NVCC becomes ready for C++ 17 features
+# https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#cpp14-language-features
+set(CMAKE_CUDA_STANDARD 14)
+set(CMAKE_CUDA_STANDARD_REQUIRED 14)
+
+# In this test, we assume that the user is going to compile CUDA source code
+# with some libraries (fmt in this case).
+#
+# In addition to that, this test invokes both the C++ host compiler and NVCC
+# by providing another (non-CUDA) C++ source code.
+if (${CMAKE_VERSION} VERSION_LESS 3.15)
+  # https://docs.nvidia.com/cuda/cuda-compiler-driver-nvcc/index.html
+  list(APPEND CUDA_NVCC_FLAGS "-std=c++14")
+  if (MSVC)
+    # This is the solution of pytorch:
+    # https://github.com/pytorch/pytorch/pull/7118
+    list(APPEND CUDA_NVCC_FLAGS "-Xcompiler" "/std:c++14")
+    list(APPEND CUDA_NVCC_FLAGS "-Xcompiler" "/Zc:__cplusplus")
+    # for the reason of this -Xcompiler options, see below.
+  endif ()
+  cuda_add_executable(fmt-in-cuda-test cuda-cpp14.cu cpp14.cc)
+  target_compile_features(fmt-in-cuda-test PRIVATE cxx_std_14)
+  if (MSVC)
+    # This part is for (non-CUDA) C++ code. MSVC can define incorrect
+    # `__cplusplus` macro. Fix for the issue is to use additional compiler flag. 
+    #
+    # See Also:
+    # https://devblogs.microsoft.com/cppblog/msvc-now-correctly-reports-__cplusplus/
+    # https://github.com/Microsoft/vscode-cpptools/issues/2595
+    target_compile_options(fmt-in-cuda-test PRIVATE /Zc:__cplusplus /permissive-)
+  endif ()
+else()
+  # now using a "new" way of handling CUDA
+  add_executable(fmt-in-cuda-test cuda-cpp14.cu cpp14.cc)
+  set_target_properties(fmt-in-cuda-test PROPERTIES CUDA_SEPARABLE_COMPILATION ON)
+  target_compile_features(fmt-in-cuda-test PRIVATE cxx_std_14)
+  if (MSVC)
+    # with MSVC, 'cxx_std_14' will only propagate to the host code (MSVC), but will
+    # not set __cplusplus correctly anyway, while nvcc will ignore it.
+    # If specified for nvcc on the command line as '-std=c++14' nvcc will emit this
+    # message instead:
+    # nvcc warning : The -std=c++14 flag is not supported with the configured host
+    #                compiler. Flag will be ignored.
+    set_property(SOURCE cuda-cpp14.cu APPEND PROPERTY
+      COMPILE_OPTIONS -Xcompiler /std:c++14 -Xcompiler /Zc:__cplusplus)
+    set_property(SOURCE cpp14.cc APPEND PROPERTY
+      COMPILE_OPTIONS /std:c++14 /Zc:__cplusplus)
+  endif()
+endif()
+
+get_target_property(IN_USE_CUDA_STANDARD fmt-in-cuda-test CUDA_STANDARD)
+message(STATUS "cuda_standard:          ${IN_USE_CUDA_STANDARD}")
+
+get_target_property(IN_USE_CUDA_STANDARD_REQUIRED
+    fmt-in-cuda-test CUDA_STANDARD_REQUIRED)
+message(STATUS "cuda_standard_required: ${IN_USE_CUDA_STANDARD_REQUIRED}")
+
+# We don't use PUBLIC or other keyword for reasons explained in the
+# CUDA_LINK_LIBRARIES_KEYWORD section in
+# https://cmake.org/cmake/help/latest/module/FindCUDA.html
+target_link_libraries(fmt-in-cuda-test fmt::fmt)
+
diff --git a/3rdparty/fmt/test/cuda-test/cpp14.cc b/3rdparty/fmt/test/cuda-test/cpp14.cc
new file mode 100644
index 00000000..ad846396
--- /dev/null
+++ b/3rdparty/fmt/test/cuda-test/cpp14.cc
@@ -0,0 +1,11 @@
+#include <fmt/core.h>
+
+// The purpose of this part is to ensure NVCC's host compiler also supports
+// the standard version. See 'cuda-cpp14.cu'.
+//
+// https://en.cppreference.com/w/cpp/preprocessor/replace#Predefined_macros
+static_assert(__cplusplus >= 201402L, "expect C++ 2014 for host compiler");
+
+auto make_message_cpp() -> std::string {
+  return fmt::format("host compiler \t: __cplusplus == {}", __cplusplus);
+}
diff --git a/3rdparty/fmt/test/cuda-test/cuda-cpp14.cu b/3rdparty/fmt/test/cuda-test/cuda-cpp14.cu
new file mode 100644
index 00000000..76a9d088
--- /dev/null
+++ b/3rdparty/fmt/test/cuda-test/cuda-cpp14.cu
@@ -0,0 +1,28 @@
+//  Direct NVCC command line example:
+//
+//  nvcc ./cuda-cpp14.cu -x cu -I"../include" -l"fmtd" -L"../build/Debug" \
+//       -std=c++14 -Xcompiler /std:c++14 -Xcompiler /Zc:__cplusplus
+
+// Ensure that we are using the latest C++ standard for NVCC
+// The version is C++14
+//
+// https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#c-cplusplus-language-support
+// https://en.cppreference.com/w/cpp/preprocessor/replace#Predefined_macros
+static_assert(__cplusplus >= 201402L, "expect C++ 2014 for nvcc");
+
+#include <fmt/core.h>
+
+#include <cuda.h>
+#include <iostream>
+
+extern auto make_message_cpp() -> std::string;
+extern auto make_message_cuda() -> std::string;
+
+int main() {
+  std::cout << make_message_cuda() << std::endl;
+  std::cout << make_message_cpp() << std::endl;
+}
+
+auto make_message_cuda() -> std::string {
+  return fmt::format("nvcc compiler \t: __cplusplus == {}", __cplusplus);
+}
diff --git a/3rdparty/fmt/test/enforce-checks-test.cc b/3rdparty/fmt/test/enforce-checks-test.cc
new file mode 100644
index 00000000..c77cb142
--- /dev/null
+++ b/3rdparty/fmt/test/enforce-checks-test.cc
@@ -0,0 +1,63 @@
+// Formatting library for C++ - formatting library tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include <iterator>
+#include <vector>
+
+#include "fmt/chrono.h"
+#include "fmt/color.h"
+#include "fmt/format.h"
+#include "fmt/ostream.h"
+#include "fmt/ranges.h"
+#include "fmt/xchar.h"
+
+// Exercise the API to verify that everything we expect to can compile.
+void test_format_api() {
+  (void)fmt::format(FMT_STRING("{}"), 42);
+  (void)fmt::format(FMT_STRING(L"{}"), 42);
+  (void)fmt::format(FMT_STRING("noop"));
+
+  (void)fmt::to_string(42);
+  (void)fmt::to_wstring(42);
+
+  std::vector<char> out;
+  fmt::format_to(std::back_inserter(out), FMT_STRING("{}"), 42);
+
+  char buffer[4];
+  fmt::format_to_n(buffer, 3, FMT_STRING("{}"), 12345);
+
+  wchar_t wbuffer[4];
+  fmt::format_to_n(wbuffer, 3, FMT_STRING(L"{}"), 12345);
+}
+
+void test_chrono() {
+  (void)fmt::format(FMT_STRING("{}"), std::chrono::seconds(42));
+  (void)fmt::format(FMT_STRING(L"{}"), std::chrono::seconds(42));
+}
+
+void test_text_style() {
+  fmt::print(fg(fmt::rgb(255, 20, 30)), FMT_STRING("{}"), "rgb(255,20,30)");
+  (void)fmt::format(fg(fmt::rgb(255, 20, 30)), FMT_STRING("{}"),
+                    "rgb(255,20,30)");
+
+  fmt::text_style ts = fg(fmt::rgb(255, 20, 30));
+  std::string out;
+  fmt::format_to(std::back_inserter(out), ts,
+                 FMT_STRING("rgb(255,20,30){}{}{}"), 1, 2, 3);
+}
+
+void test_range() {
+  std::vector<char> hello = {'h', 'e', 'l', 'l', 'o'};
+  (void)fmt::format(FMT_STRING("{}"), hello);
+}
+
+int main() {
+  test_format_api();
+  test_chrono();
+  test_text_style();
+  test_range();
+}
diff --git a/3rdparty/fmt/test/find-package-test/CMakeLists.txt b/3rdparty/fmt/test/find-package-test/CMakeLists.txt
new file mode 100644
index 00000000..93d686e6
--- /dev/null
+++ b/3rdparty/fmt/test/find-package-test/CMakeLists.txt
@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.1...3.18)
+
+project(fmt-test)
+
+find_package(FMT REQUIRED)
+
+add_executable(library-test main.cc)
+target_link_libraries(library-test fmt::fmt)
+target_compile_options(library-test PRIVATE ${PEDANTIC_COMPILE_FLAGS})
+target_include_directories(library-test PUBLIC SYSTEM .)
+
+if (TARGET fmt::fmt-header-only)
+  add_executable(header-only-test main.cc)
+  target_link_libraries(header-only-test fmt::fmt-header-only)
+  target_compile_options(header-only-test PRIVATE ${PEDANTIC_COMPILE_FLAGS})
+  target_include_directories(header-only-test PUBLIC SYSTEM .)
+endif ()
diff --git a/3rdparty/fmt/test/find-package-test/main.cc b/3rdparty/fmt/test/find-package-test/main.cc
new file mode 100644
index 00000000..911e0e8d
--- /dev/null
+++ b/3rdparty/fmt/test/find-package-test/main.cc
@@ -0,0 +1,5 @@
+#include "fmt/format.h"
+
+int main(int argc, char** argv) {
+  for (int i = 0; i < argc; ++i) fmt::print("{}: {}\n", i, argv[i]);
+}
diff --git a/3rdparty/fmt/test/format-impl-test.cc b/3rdparty/fmt/test/format-impl-test.cc
new file mode 100644
index 00000000..a012306f
--- /dev/null
+++ b/3rdparty/fmt/test/format-impl-test.cc
@@ -0,0 +1,377 @@
+// Formatting library for C++ - formatting library implementation tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include <algorithm>
+#include <cstring>
+
+// clang-format off
+#include "test-assert.h"
+// clang-format on
+
+#include "fmt/format.h"
+#include "gmock/gmock.h"
+#include "util.h"
+
+using fmt::detail::bigint;
+using fmt::detail::fp;
+using fmt::detail::max_value;
+
+static_assert(!std::is_copy_constructible<bigint>::value, "");
+static_assert(!std::is_copy_assignable<bigint>::value, "");
+
+TEST(bigint_test, construct) {
+  EXPECT_EQ("", fmt::format("{}", bigint()));
+  EXPECT_EQ("42", fmt::format("{}", bigint(0x42)));
+  EXPECT_EQ("123456789abcedf0", fmt::format("{}", bigint(0x123456789abcedf0)));
+}
+
+TEST(bigint_test, compare) {
+  bigint n1(42);
+  bigint n2(42);
+  EXPECT_EQ(compare(n1, n2), 0);
+  n2 <<= 32;
+  EXPECT_LT(compare(n1, n2), 0);
+  bigint n3(43);
+  EXPECT_LT(compare(n1, n3), 0);
+  EXPECT_GT(compare(n3, n1), 0);
+  bigint n4(42 * 0x100000001);
+  EXPECT_LT(compare(n2, n4), 0);
+  EXPECT_GT(compare(n4, n2), 0);
+}
+
+TEST(bigint_test, add_compare) {
+  EXPECT_LT(
+      add_compare(bigint(0xffffffff), bigint(0xffffffff), bigint(1) <<= 64), 0);
+  EXPECT_LT(add_compare(bigint(1) <<= 32, bigint(1), bigint(1) <<= 96), 0);
+  EXPECT_GT(add_compare(bigint(1) <<= 32, bigint(0), bigint(0xffffffff)), 0);
+  EXPECT_GT(add_compare(bigint(0), bigint(1) <<= 32, bigint(0xffffffff)), 0);
+  EXPECT_GT(add_compare(bigint(42), bigint(1), bigint(42)), 0);
+  EXPECT_GT(add_compare(bigint(0xffffffff), bigint(1), bigint(0xffffffff)), 0);
+  EXPECT_LT(add_compare(bigint(10), bigint(10), bigint(22)), 0);
+  EXPECT_LT(add_compare(bigint(0x100000010), bigint(0x100000010),
+                        bigint(0x300000010)),
+            0);
+  EXPECT_GT(add_compare(bigint(0x1ffffffff), bigint(0x100000002),
+                        bigint(0x300000000)),
+            0);
+  EXPECT_EQ(add_compare(bigint(0x1ffffffff), bigint(0x100000002),
+                        bigint(0x300000001)),
+            0);
+  EXPECT_LT(add_compare(bigint(0x1ffffffff), bigint(0x100000002),
+                        bigint(0x300000002)),
+            0);
+  EXPECT_LT(add_compare(bigint(0x1ffffffff), bigint(0x100000002),
+                        bigint(0x300000003)),
+            0);
+}
+
+TEST(bigint_test, shift_left) {
+  bigint n(0x42);
+  n <<= 0;
+  EXPECT_EQ("42", fmt::format("{}", n));
+  n <<= 1;
+  EXPECT_EQ("84", fmt::format("{}", n));
+  n <<= 25;
+  EXPECT_EQ("108000000", fmt::format("{}", n));
+}
+
+TEST(bigint_test, multiply) {
+  bigint n(0x42);
+  EXPECT_THROW(n *= 0, assertion_failure);
+  n *= 1;
+  EXPECT_EQ("42", fmt::format("{}", n));
+  n *= 2;
+  EXPECT_EQ("84", fmt::format("{}", n));
+  n *= 0x12345678;
+  EXPECT_EQ("962fc95e0", fmt::format("{}", n));
+  bigint bigmax(max_value<uint32_t>());
+  bigmax *= max_value<uint32_t>();
+  EXPECT_EQ("fffffffe00000001", fmt::format("{}", bigmax));
+  bigmax.assign(max_value<uint64_t>());
+  bigmax *= max_value<uint64_t>();
+  EXPECT_EQ("fffffffffffffffe0000000000000001", fmt::format("{}", bigmax));
+}
+
+TEST(bigint_test, accumulator) {
+  fmt::detail::accumulator acc;
+  EXPECT_EQ(acc.lower, 0);
+  EXPECT_EQ(acc.upper, 0);
+  acc.upper = 12;
+  acc.lower = 34;
+  EXPECT_EQ(static_cast<uint32_t>(acc), 34);
+  acc += 56;
+  EXPECT_EQ(acc.lower, 90);
+  acc += max_value<uint64_t>();
+  EXPECT_EQ(acc.upper, 13);
+  EXPECT_EQ(acc.lower, 89);
+  acc >>= 32;
+  EXPECT_EQ(acc.upper, 0);
+  EXPECT_EQ(acc.lower, 13 * 0x100000000);
+}
+
+TEST(bigint_test, square) {
+  bigint n0(0);
+  n0.square();
+  EXPECT_EQ("0", fmt::format("{}", n0));
+  bigint n1(0x100);
+  n1.square();
+  EXPECT_EQ("10000", fmt::format("{}", n1));
+  bigint n2(0xfffffffff);
+  n2.square();
+  EXPECT_EQ("ffffffffe000000001", fmt::format("{}", n2));
+  bigint n3(max_value<uint64_t>());
+  n3.square();
+  EXPECT_EQ("fffffffffffffffe0000000000000001", fmt::format("{}", n3));
+  bigint n4;
+  n4.assign_pow10(10);
+  EXPECT_EQ("2540be400", fmt::format("{}", n4));
+}
+
+TEST(bigint_test, divmod_assign_zero_divisor) {
+  bigint zero(0);
+  EXPECT_THROW(bigint(0).divmod_assign(zero), assertion_failure);
+  EXPECT_THROW(bigint(42).divmod_assign(zero), assertion_failure);
+}
+
+TEST(bigint_test, divmod_assign_self) {
+  bigint n(100);
+  EXPECT_THROW(n.divmod_assign(n), assertion_failure);
+}
+
+TEST(bigint_test, divmod_assign_unaligned) {
+  // (42 << 340) / pow(10, 100):
+  bigint n1(42);
+  n1 <<= 340;
+  bigint n2;
+  n2.assign_pow10(100);
+  int result = n1.divmod_assign(n2);
+  EXPECT_EQ(result, 9406);
+  EXPECT_EQ("10f8353019583bfc29ffc8f564e1b9f9d819dbb4cf783e4507eca1539220p96",
+            fmt::format("{}", n1));
+}
+
+TEST(bigint_test, divmod_assign) {
+  // 100 / 10:
+  bigint n1(100);
+  int result = n1.divmod_assign(bigint(10));
+  EXPECT_EQ(result, 10);
+  EXPECT_EQ("0", fmt::format("{}", n1));
+  // pow(10, 100) / (42 << 320):
+  n1.assign_pow10(100);
+  result = n1.divmod_assign(bigint(42) <<= 320);
+  EXPECT_EQ(result, 111);
+  EXPECT_EQ("13ad2594c37ceb0b2784c4ce0bf38ace408e211a7caab24308a82e8f10p96",
+            fmt::format("{}", n1));
+  // 42 / 100:
+  bigint n2(42);
+  n1.assign_pow10(2);
+  result = n2.divmod_assign(n1);
+  EXPECT_EQ(result, 0);
+  EXPECT_EQ("2a", fmt::format("{}", n2));
+}
+
+template <bool is_iec559> void run_double_tests() {
+  fmt::print("warning: double is not IEC559, skipping FP tests\n");
+}
+
+template <> void run_double_tests<true>() {
+  // Construct from double.
+  EXPECT_EQ(fp(1.23), fp(0x13ae147ae147aeu, -52));
+}
+
+TEST(fp_test, double_tests) {
+  run_double_tests<std::numeric_limits<double>::is_iec559>();
+}
+
+TEST(fp_test, normalize) {
+  const auto v = fp(0xbeef, 42);
+  auto normalized = normalize(v);
+  EXPECT_EQ(0xbeef000000000000, normalized.f);
+  EXPECT_EQ(-6, normalized.e);
+}
+
+TEST(fp_test, multiply) {
+  auto v = fp(123ULL << 32, 4) * fp(56ULL << 32, 7);
+  EXPECT_EQ(v.f, 123u * 56u);
+  EXPECT_EQ(v.e, 4 + 7 + 64);
+  v = fp(123ULL << 32, 4) * fp(567ULL << 31, 8);
+  EXPECT_EQ(v.f, (123 * 567 + 1u) / 2);
+  EXPECT_EQ(v.e, 4 + 8 + 64);
+}
+
+TEST(fp_test, get_cached_power) {
+  using limits = std::numeric_limits<double>;
+  for (auto exp = limits::min_exponent; exp <= limits::max_exponent; ++exp) {
+    int dec_exp = 0;
+    auto fp = fmt::detail::get_cached_power(exp, dec_exp);
+    bigint exact, cache(fp.f);
+    if (dec_exp >= 0) {
+      exact.assign_pow10(dec_exp);
+      if (fp.e <= 0)
+        exact <<= -fp.e;
+      else
+        cache <<= fp.e;
+      exact.align(cache);
+      cache.align(exact);
+      auto exact_str = fmt::format("{}", exact);
+      auto cache_str = fmt::format("{}", cache);
+      EXPECT_EQ(exact_str.size(), cache_str.size());
+      EXPECT_EQ(exact_str.substr(0, 15), cache_str.substr(0, 15));
+      int diff = cache_str[15] - exact_str[15];
+      if (diff == 1)
+        EXPECT_GT(exact_str[16], '8');
+      else
+        EXPECT_EQ(diff, 0);
+    } else {
+      cache.assign_pow10(-dec_exp);
+      cache *= fp.f + 1;  // Inexact check.
+      exact.assign(1);
+      exact <<= -fp.e;
+      exact.align(cache);
+      auto exact_str = fmt::format("{}", exact);
+      auto cache_str = fmt::format("{}", cache);
+      EXPECT_EQ(exact_str.size(), cache_str.size());
+      EXPECT_EQ(exact_str.substr(0, 16), cache_str.substr(0, 16));
+    }
+  }
+}
+
+TEST(fp_test, dragonbox_max_k) {
+  using fmt::detail::dragonbox::floor_log10_pow2;
+  using float_info = fmt::detail::dragonbox::float_info<float>;
+  EXPECT_EQ(fmt::detail::const_check(float_info::max_k),
+            float_info::kappa - floor_log10_pow2(float_info::min_exponent -
+                                                 float_info::significand_bits));
+  using double_info = fmt::detail::dragonbox::float_info<double>;
+  EXPECT_EQ(
+      fmt::detail::const_check(double_info::max_k),
+      double_info::kappa - floor_log10_pow2(double_info::min_exponent -
+                                            double_info::significand_bits));
+}
+
+TEST(fp_test, get_round_direction) {
+  using fmt::detail::get_round_direction;
+  using fmt::detail::round_direction;
+  EXPECT_EQ(round_direction::down, get_round_direction(100, 50, 0));
+  EXPECT_EQ(round_direction::up, get_round_direction(100, 51, 0));
+  EXPECT_EQ(round_direction::down, get_round_direction(100, 40, 10));
+  EXPECT_EQ(round_direction::up, get_round_direction(100, 60, 10));
+  for (size_t i = 41; i < 60; ++i)
+    EXPECT_EQ(round_direction::unknown, get_round_direction(100, i, 10));
+  uint64_t max = max_value<uint64_t>();
+  EXPECT_THROW(get_round_direction(100, 100, 0), assertion_failure);
+  EXPECT_THROW(get_round_direction(100, 0, 100), assertion_failure);
+  EXPECT_THROW(get_round_direction(100, 0, 50), assertion_failure);
+  // Check that remainder + error doesn't overflow.
+  EXPECT_EQ(round_direction::up, get_round_direction(max, max - 1, 2));
+  // Check that 2 * (remainder + error) doesn't overflow.
+  EXPECT_EQ(round_direction::unknown,
+            get_round_direction(max, max / 2 + 1, max / 2));
+  // Check that remainder - error doesn't overflow.
+  EXPECT_EQ(round_direction::unknown, get_round_direction(100, 40, 41));
+  // Check that 2 * (remainder - error) doesn't overflow.
+  EXPECT_EQ(round_direction::up, get_round_direction(max, max - 1, 1));
+}
+
+TEST(fp_test, fixed_handler) {
+  struct handler : fmt::detail::gen_digits_handler {
+    char buffer[10];
+    handler(int prec = 0) : fmt::detail::gen_digits_handler() {
+      buf = buffer;
+      precision = prec;
+    }
+  };
+  handler().on_digit('0', 100, 99, 0, false);
+  EXPECT_THROW(handler().on_digit('0', 100, 100, 0, false), assertion_failure);
+  namespace digits = fmt::detail::digits;
+  EXPECT_EQ(handler(1).on_digit('0', 100, 10, 10, false), digits::error);
+  // Check that divisor - error doesn't overflow.
+  EXPECT_EQ(handler(1).on_digit('0', 100, 10, 101, false), digits::error);
+  // Check that 2 * error doesn't overflow.
+  uint64_t max = max_value<uint64_t>();
+  EXPECT_EQ(handler(1).on_digit('0', max, 10, max - 1, false), digits::error);
+}
+
+TEST(fp_test, grisu_format_compiles_with_on_ieee_double) {
+  fmt::memory_buffer buf;
+  format_float(0.42, -1, fmt::detail::float_specs(), buf);
+}
+
+TEST(format_impl_test, format_error_code) {
+  std::string msg = "error 42", sep = ": ";
+  {
+    fmt::memory_buffer buffer;
+    format_to(fmt::appender(buffer), "garbage");
+    fmt::detail::format_error_code(buffer, 42, "test");
+    EXPECT_EQ("test: " + msg, to_string(buffer));
+  }
+  {
+    fmt::memory_buffer buffer;
+    auto prefix =
+        std::string(fmt::inline_buffer_size - msg.size() - sep.size() + 1, 'x');
+    fmt::detail::format_error_code(buffer, 42, prefix);
+    EXPECT_EQ(msg, to_string(buffer));
+  }
+  int codes[] = {42, -1};
+  for (size_t i = 0, n = sizeof(codes) / sizeof(*codes); i < n; ++i) {
+    // Test maximum buffer size.
+    msg = fmt::format("error {}", codes[i]);
+    fmt::memory_buffer buffer;
+    auto prefix =
+        std::string(fmt::inline_buffer_size - msg.size() - sep.size(), 'x');
+    fmt::detail::format_error_code(buffer, codes[i], prefix);
+    EXPECT_EQ(prefix + sep + msg, to_string(buffer));
+    size_t size = fmt::inline_buffer_size;
+    EXPECT_EQ(size, buffer.size());
+    buffer.resize(0);
+    // Test with a message that doesn't fit into the buffer.
+    prefix += 'x';
+    fmt::detail::format_error_code(buffer, codes[i], prefix);
+    EXPECT_EQ(msg, to_string(buffer));
+  }
+}
+
+TEST(format_impl_test, compute_width) {
+  EXPECT_EQ(4,
+            fmt::detail::compute_width(
+                fmt::basic_string_view<fmt::detail::char8_type>(
+                    reinterpret_cast<const fmt::detail::char8_type*>("ёжик"))));
+}
+
+// Tests fmt::detail::count_digits for integer type Int.
+template <typename Int> void test_count_digits() {
+  for (Int i = 0; i < 10; ++i) EXPECT_EQ(1u, fmt::detail::count_digits(i));
+  for (Int i = 1, n = 1, end = max_value<Int>() / 10; n <= end; ++i) {
+    n *= 10;
+    EXPECT_EQ(i, fmt::detail::count_digits(n - 1));
+    EXPECT_EQ(i + 1, fmt::detail::count_digits(n));
+  }
+}
+
+TEST(format_impl_test, count_digits) {
+  test_count_digits<uint32_t>();
+  test_count_digits<uint64_t>();
+}
+
+TEST(format_impl_test, write_fallback_uintptr) {
+  std::string s;
+  fmt::detail::write_ptr<char>(
+      std::back_inserter(s),
+      fmt::detail::fallback_uintptr(reinterpret_cast<void*>(0xface)), nullptr);
+  EXPECT_EQ(s, "0xface");
+}
+
+#ifdef _WIN32
+#  include <windows.h>
+#endif
+
+#ifdef _WIN32
+TEST(format_impl_test, write_console_signature) {
+  decltype(WriteConsoleW)* p = fmt::detail::WriteConsoleW;
+  (void)p;
+}
+#endif
diff --git a/3rdparty/fmt/test/format-test.cc b/3rdparty/fmt/test/format-test.cc
new file mode 100644
index 00000000..a8592ef0
--- /dev/null
+++ b/3rdparty/fmt/test/format-test.cc
@@ -0,0 +1,2190 @@
+// Formatting library for C++ - formatting library tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+// Check if fmt/format.h compiles with windows.h included before it.
+#ifdef _WIN32
+#  include <windows.h>
+#endif
+// clang-format off
+#include "fmt/format.h"
+// clang-format on
+
+#include <stdint.h>  // uint32_t
+
+#include <climits>      // INT_MAX
+#include <cmath>        // std::signbit
+#include <cstring>      // std::strlen
+#include <iterator>     // std::back_inserter
+#include <list>         // std::list
+#include <memory>       // std::unique_ptr
+#include <type_traits>  // std::is_default_constructible
+
+#include "gtest-extra.h"
+#include "mock-allocator.h"
+#include "util.h"
+
+using fmt::basic_memory_buffer;
+using fmt::format_error;
+using fmt::memory_buffer;
+using fmt::runtime;
+using fmt::string_view;
+using fmt::detail::max_value;
+
+using testing::Return;
+using testing::StrictMock;
+
+enum { buffer_size = 256 };
+
+struct uint32_pair {
+  uint32_t u[2];
+};
+
+TEST(util_test, bit_cast) {
+  auto s = fmt::detail::bit_cast<uint32_pair>(uint64_t{42});
+  EXPECT_EQ(fmt::detail::bit_cast<uint64_t>(s), 42ull);
+  s = fmt::detail::bit_cast<uint32_pair>(~uint64_t{0});
+  EXPECT_EQ(fmt::detail::bit_cast<uint64_t>(s), ~0ull);
+}
+
+// Increment a number in a string.
+void increment(char* s) {
+  for (int i = static_cast<int>(std::strlen(s)) - 1; i >= 0; --i) {
+    if (s[i] != '9') {
+      ++s[i];
+      break;
+    }
+    s[i] = '0';
+  }
+}
+
+TEST(util_test, increment) {
+  char s[10] = "123";
+  increment(s);
+  EXPECT_STREQ("124", s);
+  s[2] = '8';
+  increment(s);
+  EXPECT_STREQ("129", s);
+  increment(s);
+  EXPECT_STREQ("130", s);
+  s[1] = s[2] = '9';
+  increment(s);
+  EXPECT_STREQ("200", s);
+}
+
+TEST(util_test, parse_nonnegative_int) {
+  auto s = fmt::string_view("10000000000");
+  auto begin = s.begin(), end = s.end();
+  EXPECT_EQ(fmt::detail::parse_nonnegative_int(begin, end, -1), -1);
+  s = "2147483649";
+  begin = s.begin();
+  end = s.end();
+  EXPECT_EQ(fmt::detail::parse_nonnegative_int(begin, end, -1), -1);
+}
+
+TEST(util_test, utf8_to_utf16) {
+  auto u = fmt::detail::utf8_to_utf16("лошадка");
+  EXPECT_EQ(L"\x043B\x043E\x0448\x0430\x0434\x043A\x0430", u.str());
+  EXPECT_EQ(7, u.size());
+  // U+10437 { DESERET SMALL LETTER YEE }
+  EXPECT_EQ(L"\xD801\xDC37", fmt::detail::utf8_to_utf16("𐐷").str());
+  EXPECT_THROW_MSG(fmt::detail::utf8_to_utf16("\xc3\x28"), std::runtime_error,
+                   "invalid utf8");
+  EXPECT_THROW_MSG(fmt::detail::utf8_to_utf16(fmt::string_view("л", 1)),
+                   std::runtime_error, "invalid utf8");
+  EXPECT_EQ(L"123456", fmt::detail::utf8_to_utf16("123456").str());
+}
+
+TEST(util_test, utf8_to_utf16_empty_string) {
+  auto s = std::string();
+  auto u = fmt::detail::utf8_to_utf16(s.c_str());
+  EXPECT_EQ(L"", u.str());
+  EXPECT_EQ(s.size(), u.size());
+}
+
+TEST(util_test, allocator_ref) {
+  using test_allocator_ref = allocator_ref<mock_allocator<int>>;
+  auto check_forwarding = [](mock_allocator<int>& alloc,
+                             test_allocator_ref& ref) {
+    int mem;
+    // Check if value_type is properly defined.
+    allocator_ref<mock_allocator<int>>::value_type* ptr = &mem;
+    // Check forwarding.
+    EXPECT_CALL(alloc, allocate(42)).WillOnce(Return(ptr));
+    ref.allocate(42);
+    EXPECT_CALL(alloc, deallocate(ptr, 42));
+    ref.deallocate(ptr, 42);
+  };
+
+  StrictMock<mock_allocator<int>> alloc;
+  auto ref = test_allocator_ref(&alloc);
+  // Check if allocator_ref forwards to the underlying allocator.
+  check_forwarding(alloc, ref);
+  test_allocator_ref ref2(ref);
+  check_forwarding(alloc, ref2);
+  test_allocator_ref ref3;
+  EXPECT_EQ(nullptr, ref3.get());
+  ref3 = ref;
+  check_forwarding(alloc, ref3);
+}
+
+TEST(util_test, format_system_error) {
+  fmt::memory_buffer message;
+  fmt::format_system_error(message, EDOM, "test");
+  auto ec = std::error_code(EDOM, std::generic_category());
+  EXPECT_EQ(to_string(message), std::system_error(ec, "test").what());
+  message = fmt::memory_buffer();
+
+  // Check if std::allocator throws on allocating max size_t / 2 chars.
+  size_t max_size = max_value<size_t>() / 2;
+  bool throws_on_alloc = false;
+  try {
+    auto alloc = std::allocator<char>();
+    alloc.deallocate(alloc.allocate(max_size), max_size);
+  } catch (const std::bad_alloc&) {
+    throws_on_alloc = true;
+  }
+  if (!throws_on_alloc) {
+    fmt::print("warning: std::allocator allocates {} chars", max_size);
+    return;
+  }
+}
+
+TEST(util_test, system_error) {
+  auto test_error = fmt::system_error(EDOM, "test");
+  auto ec = std::error_code(EDOM, std::generic_category());
+  EXPECT_STREQ(test_error.what(), std::system_error(ec, "test").what());
+  EXPECT_EQ(test_error.code(), ec);
+
+  auto error = std::system_error(std::error_code());
+  try {
+    throw fmt::system_error(EDOM, "test {}", "error");
+  } catch (const std::system_error& e) {
+    error = e;
+  }
+  fmt::memory_buffer message;
+  fmt::format_system_error(message, EDOM, "test error");
+  EXPECT_EQ(error.what(), to_string(message));
+  EXPECT_EQ(error.code(), std::error_code(EDOM, std::generic_category()));
+}
+
+TEST(util_test, report_system_error) {
+  fmt::memory_buffer out;
+  fmt::format_system_error(out, EDOM, "test error");
+  out.push_back('\n');
+  EXPECT_WRITE(stderr, fmt::report_system_error(EDOM, "test error"),
+               to_string(out));
+}
+
+TEST(memory_buffer_test, ctor) {
+  basic_memory_buffer<char, 123> buffer;
+  EXPECT_EQ(static_cast<size_t>(0), buffer.size());
+  EXPECT_EQ(123u, buffer.capacity());
+}
+
+using std_allocator = allocator_ref<std::allocator<char>>;
+
+TEST(memory_buffer_test, move_ctor_inline_buffer) {
+  auto check_move_buffer =
+      [](const char* str, basic_memory_buffer<char, 5, std_allocator>& buffer) {
+        std::allocator<char>* alloc = buffer.get_allocator().get();
+        basic_memory_buffer<char, 5, std_allocator> buffer2(std::move(buffer));
+        // Move shouldn't destroy the inline content of the first buffer.
+        EXPECT_EQ(str, std::string(&buffer[0], buffer.size()));
+        EXPECT_EQ(str, std::string(&buffer2[0], buffer2.size()));
+        EXPECT_EQ(5u, buffer2.capacity());
+        // Move should transfer allocator.
+        EXPECT_EQ(nullptr, buffer.get_allocator().get());
+        EXPECT_EQ(alloc, buffer2.get_allocator().get());
+      };
+
+  auto alloc = std::allocator<char>();
+  basic_memory_buffer<char, 5, std_allocator> buffer((std_allocator(&alloc)));
+  const char test[] = "test";
+  buffer.append(string_view(test, 4));
+  check_move_buffer("test", buffer);
+  // Adding one more character fills the inline buffer, but doesn't cause
+  // dynamic allocation.
+  buffer.push_back('a');
+  check_move_buffer("testa", buffer);
+}
+
+TEST(memory_buffer_test, move_ctor_dynamic_buffer) {
+  auto alloc = std::allocator<char>();
+  basic_memory_buffer<char, 4, std_allocator> buffer((std_allocator(&alloc)));
+  const char test[] = "test";
+  buffer.append(test, test + 4);
+  const char* inline_buffer_ptr = &buffer[0];
+  // Adding one more character causes the content to move from the inline to
+  // a dynamically allocated buffer.
+  buffer.push_back('a');
+  basic_memory_buffer<char, 4, std_allocator> buffer2(std::move(buffer));
+  // Move should rip the guts of the first buffer.
+  EXPECT_EQ(inline_buffer_ptr, &buffer[0]);
+  EXPECT_EQ("testa", std::string(&buffer2[0], buffer2.size()));
+  EXPECT_GT(buffer2.capacity(), 4u);
+}
+
+void check_move_assign_buffer(const char* str,
+                              basic_memory_buffer<char, 5>& buffer) {
+  basic_memory_buffer<char, 5> buffer2;
+  buffer2 = std::move(buffer);
+  // Move shouldn't destroy the inline content of the first buffer.
+  EXPECT_EQ(str, std::string(&buffer[0], buffer.size()));
+  EXPECT_EQ(str, std::string(&buffer2[0], buffer2.size()));
+  EXPECT_EQ(5u, buffer2.capacity());
+}
+
+TEST(memory_buffer_test, move_assignment) {
+  basic_memory_buffer<char, 5> buffer;
+  const char test[] = "test";
+  buffer.append(test, test + 4);
+  check_move_assign_buffer("test", buffer);
+  // Adding one more character fills the inline buffer, but doesn't cause
+  // dynamic allocation.
+  buffer.push_back('a');
+  check_move_assign_buffer("testa", buffer);
+  const char* inline_buffer_ptr = &buffer[0];
+  // Adding one more character causes the content to move from the inline to
+  // a dynamically allocated buffer.
+  buffer.push_back('b');
+  basic_memory_buffer<char, 5> buffer2;
+  buffer2 = std::move(buffer);
+  // Move should rip the guts of the first buffer.
+  EXPECT_EQ(inline_buffer_ptr, &buffer[0]);
+  EXPECT_EQ("testab", std::string(&buffer2[0], buffer2.size()));
+  EXPECT_GT(buffer2.capacity(), 5u);
+}
+
+TEST(memory_buffer_test, grow) {
+  typedef allocator_ref<mock_allocator<int>> Allocator;
+  mock_allocator<int> alloc;
+  basic_memory_buffer<int, 10, Allocator> buffer((Allocator(&alloc)));
+  buffer.resize(7);
+  using fmt::detail::to_unsigned;
+  for (int i = 0; i < 7; ++i) buffer[to_unsigned(i)] = i * i;
+  EXPECT_EQ(10u, buffer.capacity());
+  int mem[20];
+  mem[7] = 0xdead;
+  EXPECT_CALL(alloc, allocate(20)).WillOnce(Return(mem));
+  buffer.try_reserve(20);
+  EXPECT_EQ(20u, buffer.capacity());
+  // Check if size elements have been copied
+  for (int i = 0; i < 7; ++i) EXPECT_EQ(i * i, buffer[to_unsigned(i)]);
+  // and no more than that.
+  EXPECT_EQ(0xdead, buffer[7]);
+  EXPECT_CALL(alloc, deallocate(mem, 20));
+}
+
+TEST(memory_buffer_test, allocator) {
+  using test_allocator = allocator_ref<mock_allocator<char>>;
+  basic_memory_buffer<char, 10, test_allocator> buffer;
+  EXPECT_EQ(nullptr, buffer.get_allocator().get());
+  StrictMock<mock_allocator<char>> alloc;
+  char mem;
+  {
+    basic_memory_buffer<char, 10, test_allocator> buffer2(
+        (test_allocator(&alloc)));
+    EXPECT_EQ(&alloc, buffer2.get_allocator().get());
+    size_t size = 2 * fmt::inline_buffer_size;
+    EXPECT_CALL(alloc, allocate(size)).WillOnce(Return(&mem));
+    buffer2.reserve(size);
+    EXPECT_CALL(alloc, deallocate(&mem, size));
+  }
+}
+
+TEST(memory_buffer_test, exception_in_deallocate) {
+  using test_allocator = allocator_ref<mock_allocator<char>>;
+  StrictMock<mock_allocator<char>> alloc;
+  basic_memory_buffer<char, 10, test_allocator> buffer(
+      (test_allocator(&alloc)));
+  size_t size = 2 * fmt::inline_buffer_size;
+  auto mem = std::vector<char>(size);
+  {
+    EXPECT_CALL(alloc, allocate(size)).WillOnce(Return(&mem[0]));
+    buffer.resize(size);
+    std::fill(&buffer[0], &buffer[0] + size, 'x');
+  }
+  auto mem2 = std::vector<char>(2 * size);
+  {
+    EXPECT_CALL(alloc, allocate(2 * size)).WillOnce(Return(&mem2[0]));
+    auto e = std::exception();
+    EXPECT_CALL(alloc, deallocate(&mem[0], size)).WillOnce(testing::Throw(e));
+    EXPECT_THROW(buffer.reserve(2 * size), std::exception);
+    EXPECT_EQ(&mem2[0], &buffer[0]);
+    // Check that the data has been copied.
+    for (size_t i = 0; i < size; ++i) EXPECT_EQ('x', buffer[i]);
+  }
+  EXPECT_CALL(alloc, deallocate(&mem2[0], 2 * size));
+}
+
+template <typename Allocator, size_t MaxSize>
+class max_size_allocator : public Allocator {
+ public:
+  using typename Allocator::value_type;
+  size_t max_size() const FMT_NOEXCEPT { return MaxSize; }
+  value_type* allocate(size_t n) {
+    if (n > max_size()) {
+      throw std::length_error("size > max_size");
+    }
+    return std::allocator_traits<Allocator>::allocate(
+        *static_cast<Allocator*>(this), n);
+  }
+  void deallocate(value_type* p, size_t n) {
+    std::allocator_traits<Allocator>::deallocate(*static_cast<Allocator*>(this),
+                                                 p, n);
+  }
+};
+
+TEST(memory_buffer_test, max_size_allocator) {
+  // 160 = 128 + 32
+  using test_allocator = max_size_allocator<std::allocator<char>, 160>;
+  basic_memory_buffer<char, 10, test_allocator> buffer;
+  buffer.resize(128);
+  // new_capacity = 128 + 128/2 = 192 > 160
+  buffer.resize(160);  // Shouldn't throw.
+}
+
+TEST(memory_buffer_test, max_size_allocator_overflow) {
+  using test_allocator = max_size_allocator<std::allocator<char>, 160>;
+  basic_memory_buffer<char, 10, test_allocator> buffer;
+  EXPECT_THROW(buffer.resize(161), std::exception);
+}
+
+TEST(format_test, escape) {
+  EXPECT_EQ("{", fmt::format("{{"));
+  EXPECT_EQ("before {", fmt::format("before {{"));
+  EXPECT_EQ("{ after", fmt::format("{{ after"));
+  EXPECT_EQ("before { after", fmt::format("before {{ after"));
+
+  EXPECT_EQ("}", fmt::format("}}"));
+  EXPECT_EQ("before }", fmt::format("before }}"));
+  EXPECT_EQ("} after", fmt::format("}} after"));
+  EXPECT_EQ("before } after", fmt::format("before }} after"));
+
+  EXPECT_EQ("{}", fmt::format("{{}}"));
+  EXPECT_EQ("{42}", fmt::format("{{{0}}}", 42));
+}
+
+TEST(format_test, unmatched_braces) {
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{")), format_error,
+                   "invalid format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("}")), format_error,
+                   "unmatched '}' in format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0{}")), format_error,
+                   "invalid format string");
+}
+
+TEST(format_test, no_args) { EXPECT_EQ("test", fmt::format("test")); }
+
+TEST(format_test, args_in_different_positions) {
+  EXPECT_EQ("42", fmt::format("{0}", 42));
+  EXPECT_EQ("before 42", fmt::format("before {0}", 42));
+  EXPECT_EQ("42 after", fmt::format("{0} after", 42));
+  EXPECT_EQ("before 42 after", fmt::format("before {0} after", 42));
+  EXPECT_EQ("answer = 42", fmt::format("{0} = {1}", "answer", 42));
+  EXPECT_EQ("42 is the answer", fmt::format("{1} is the {0}", "answer", 42));
+  EXPECT_EQ("abracadabra", fmt::format("{0}{1}{0}", "abra", "cad"));
+}
+
+TEST(format_test, arg_errors) {
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{")), format_error,
+                   "invalid format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{?}")), format_error,
+                   "invalid format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0")), format_error,
+                   "invalid format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0}")), format_error,
+                   "argument not found");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{00}"), 42), format_error,
+                   "invalid format string");
+
+  char format_str[buffer_size];
+  safe_sprintf(format_str, "{%u", INT_MAX);
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str)), format_error,
+                   "invalid format string");
+  safe_sprintf(format_str, "{%u}", INT_MAX);
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str)), format_error,
+                   "argument not found");
+
+  safe_sprintf(format_str, "{%u", INT_MAX + 1u);
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str)), format_error,
+                   "invalid format string");
+  safe_sprintf(format_str, "{%u}", INT_MAX + 1u);
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str)), format_error,
+                   "argument not found");
+}
+
+template <int N> struct test_format {
+  template <typename... T>
+  static std::string format(fmt::string_view fmt, const T&... args) {
+    return test_format<N - 1>::format(fmt, N - 1, args...);
+  }
+};
+
+template <> struct test_format<0> {
+  template <typename... T>
+  static std::string format(fmt::string_view fmt, const T&... args) {
+    return fmt::format(runtime(fmt), args...);
+  }
+};
+
+TEST(format_test, many_args) {
+  EXPECT_EQ("19", test_format<20>::format("{19}"));
+  EXPECT_THROW_MSG(test_format<20>::format("{20}"), format_error,
+                   "argument not found");
+  EXPECT_THROW_MSG(test_format<21>::format("{21}"), format_error,
+                   "argument not found");
+  using fmt::detail::max_packed_args;
+  std::string format_str = fmt::format("{{{}}}", max_packed_args + 1);
+  EXPECT_THROW_MSG(test_format<max_packed_args>::format(format_str),
+                   format_error, "argument not found");
+}
+
+TEST(format_test, named_arg) {
+  EXPECT_EQ("1/a/A", fmt::format("{_1}/{a_}/{A_}", fmt::arg("a_", 'a'),
+                                 fmt::arg("A_", "A"), fmt::arg("_1", 1)));
+  EXPECT_EQ(" -42", fmt::format("{0:{width}}", -42, fmt::arg("width", 4)));
+  EXPECT_EQ("st",
+            fmt::format("{0:.{precision}}", "str", fmt::arg("precision", 2)));
+  EXPECT_EQ("1 2", fmt::format("{} {two}", 1, fmt::arg("two", 2)));
+  EXPECT_EQ("42",
+            fmt::format("{c}", fmt::arg("a", 0), fmt::arg("b", 0),
+                        fmt::arg("c", 42), fmt::arg("d", 0), fmt::arg("e", 0),
+                        fmt::arg("f", 0), fmt::arg("g", 0), fmt::arg("h", 0),
+                        fmt::arg("i", 0), fmt::arg("j", 0), fmt::arg("k", 0),
+                        fmt::arg("l", 0), fmt::arg("m", 0), fmt::arg("n", 0),
+                        fmt::arg("o", 0), fmt::arg("p", 0)));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{a}")), format_error,
+                   "argument not found");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{a}"), 42), format_error,
+                   "argument not found");
+}
+
+TEST(format_test, auto_arg_index) {
+  EXPECT_EQ("abc", fmt::format("{}{}{}", 'a', 'b', 'c'));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0}{}"), 'a', 'b'), format_error,
+                   "cannot switch from manual to automatic argument indexing");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{}{0}"), 'a', 'b'), format_error,
+                   "cannot switch from automatic to manual argument indexing");
+  EXPECT_EQ("1.2", fmt::format("{:.{}}", 1.2345, 2));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0}:.{}"), 1.2345, 2),
+                   format_error,
+                   "cannot switch from manual to automatic argument indexing");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:.{0}}"), 1.2345, 2),
+                   format_error,
+                   "cannot switch from automatic to manual argument indexing");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{}")), format_error,
+                   "argument not found");
+}
+
+TEST(format_test, empty_specs) { EXPECT_EQ("42", fmt::format("{0:}", 42)); }
+
+TEST(format_test, left_align) {
+  EXPECT_EQ("42  ", fmt::format("{0:<4}", 42));
+  EXPECT_EQ("42  ", fmt::format("{0:<4o}", 042));
+  EXPECT_EQ("42  ", fmt::format("{0:<4x}", 0x42));
+  EXPECT_EQ("-42  ", fmt::format("{0:<5}", -42));
+  EXPECT_EQ("42   ", fmt::format("{0:<5}", 42u));
+  EXPECT_EQ("-42  ", fmt::format("{0:<5}", -42l));
+  EXPECT_EQ("42   ", fmt::format("{0:<5}", 42ul));
+  EXPECT_EQ("-42  ", fmt::format("{0:<5}", -42ll));
+  EXPECT_EQ("42   ", fmt::format("{0:<5}", 42ull));
+  EXPECT_EQ("-42  ", fmt::format("{0:<5}", -42.0));
+  EXPECT_EQ("-42  ", fmt::format("{0:<5}", -42.0l));
+  EXPECT_EQ("c    ", fmt::format("{0:<5}", 'c'));
+  EXPECT_EQ("abc  ", fmt::format("{0:<5}", "abc"));
+  EXPECT_EQ("0xface  ", fmt::format("{0:<8}", reinterpret_cast<void*>(0xface)));
+}
+
+TEST(format_test, right_align) {
+  EXPECT_EQ("  42", fmt::format("{0:>4}", 42));
+  EXPECT_EQ("  42", fmt::format("{0:>4o}", 042));
+  EXPECT_EQ("  42", fmt::format("{0:>4x}", 0x42));
+  EXPECT_EQ("  -42", fmt::format("{0:>5}", -42));
+  EXPECT_EQ("   42", fmt::format("{0:>5}", 42u));
+  EXPECT_EQ("  -42", fmt::format("{0:>5}", -42l));
+  EXPECT_EQ("   42", fmt::format("{0:>5}", 42ul));
+  EXPECT_EQ("  -42", fmt::format("{0:>5}", -42ll));
+  EXPECT_EQ("   42", fmt::format("{0:>5}", 42ull));
+  EXPECT_EQ("  -42", fmt::format("{0:>5}", -42.0));
+  EXPECT_EQ("  -42", fmt::format("{0:>5}", -42.0l));
+  EXPECT_EQ("    c", fmt::format("{0:>5}", 'c'));
+  EXPECT_EQ("  abc", fmt::format("{0:>5}", "abc"));
+  EXPECT_EQ("  0xface", fmt::format("{0:>8}", reinterpret_cast<void*>(0xface)));
+}
+
+TEST(format_test, center_align) {
+  EXPECT_EQ(" 42  ", fmt::format("{0:^5}", 42));
+  EXPECT_EQ(" 42  ", fmt::format("{0:^5o}", 042));
+  EXPECT_EQ(" 42  ", fmt::format("{0:^5x}", 0x42));
+  EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42));
+  EXPECT_EQ(" 42  ", fmt::format("{0:^5}", 42u));
+  EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42l));
+  EXPECT_EQ(" 42  ", fmt::format("{0:^5}", 42ul));
+  EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42ll));
+  EXPECT_EQ(" 42  ", fmt::format("{0:^5}", 42ull));
+  EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42.0));
+  EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42.0l));
+  EXPECT_EQ("  c  ", fmt::format("{0:^5}", 'c'));
+  EXPECT_EQ(" abc  ", fmt::format("{0:^6}", "abc"));
+  EXPECT_EQ(" 0xface ", fmt::format("{0:^8}", reinterpret_cast<void*>(0xface)));
+}
+
+TEST(format_test, fill) {
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{<5}"), 'c'), format_error,
+                   "invalid fill character '{'");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{<5}}"), 'c'), format_error,
+                   "invalid fill character '{'");
+  EXPECT_EQ("**42", fmt::format("{0:*>4}", 42));
+  EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42));
+  EXPECT_EQ("***42", fmt::format("{0:*>5}", 42u));
+  EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42l));
+  EXPECT_EQ("***42", fmt::format("{0:*>5}", 42ul));
+  EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42ll));
+  EXPECT_EQ("***42", fmt::format("{0:*>5}", 42ull));
+  EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42.0));
+  EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42.0l));
+  EXPECT_EQ("c****", fmt::format("{0:*<5}", 'c'));
+  EXPECT_EQ("abc**", fmt::format("{0:*<5}", "abc"));
+  EXPECT_EQ("**0xface",
+            fmt::format("{0:*>8}", reinterpret_cast<void*>(0xface)));
+  EXPECT_EQ("foo=", fmt::format("{:}=", "foo"));
+  EXPECT_EQ(std::string("\0\0\0*", 4),
+            fmt::format(string_view("{:\0>4}", 6), '*'));
+  EXPECT_EQ("жж42", fmt::format("{0:ж>4}", 42));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:\x80\x80\x80\x80\x80>}"), 0),
+                   format_error, "invalid type specifier");
+}
+
+TEST(format_test, plus_sign) {
+  EXPECT_EQ("+42", fmt::format("{0:+}", 42));
+  EXPECT_EQ("-42", fmt::format("{0:+}", -42));
+  EXPECT_EQ("+42", fmt::format("{0:+}", 42));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 42u), format_error,
+                   "format specifier requires signed argument");
+  EXPECT_EQ("+42", fmt::format("{0:+}", 42l));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 42ul), format_error,
+                   "format specifier requires signed argument");
+  EXPECT_EQ("+42", fmt::format("{0:+}", 42ll));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 42ull), format_error,
+                   "format specifier requires signed argument");
+  EXPECT_EQ("+42", fmt::format("{0:+}", 42.0));
+  EXPECT_EQ("+42", fmt::format("{0:+}", 42.0l));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+"), 'c'), format_error,
+                   "missing '}' in format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 'c'), format_error,
+                   "invalid format specifier for char");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), "abc"), format_error,
+                   "format specifier requires numeric argument");
+  EXPECT_THROW_MSG(
+      (void)fmt::format(runtime("{0:+}"), reinterpret_cast<void*>(0x42)),
+      format_error, "format specifier requires numeric argument");
+}
+
+TEST(format_test, minus_sign) {
+  EXPECT_EQ("42", fmt::format("{0:-}", 42));
+  EXPECT_EQ("-42", fmt::format("{0:-}", -42));
+  EXPECT_EQ("42", fmt::format("{0:-}", 42));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 42u), format_error,
+                   "format specifier requires signed argument");
+  EXPECT_EQ("42", fmt::format("{0:-}", 42l));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 42ul), format_error,
+                   "format specifier requires signed argument");
+  EXPECT_EQ("42", fmt::format("{0:-}", 42ll));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 42ull), format_error,
+                   "format specifier requires signed argument");
+  EXPECT_EQ("42", fmt::format("{0:-}", 42.0));
+  EXPECT_EQ("42", fmt::format("{0:-}", 42.0l));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-"), 'c'), format_error,
+                   "missing '}' in format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 'c'), format_error,
+                   "invalid format specifier for char");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), "abc"), format_error,
+                   "format specifier requires numeric argument");
+  EXPECT_THROW_MSG(
+      (void)fmt::format(runtime("{0:-}"), reinterpret_cast<void*>(0x42)),
+      format_error, "format specifier requires numeric argument");
+}
+
+TEST(format_test, space_sign) {
+  EXPECT_EQ(" 42", fmt::format("{0: }", 42));
+  EXPECT_EQ("-42", fmt::format("{0: }", -42));
+  EXPECT_EQ(" 42", fmt::format("{0: }", 42));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 42u), format_error,
+                   "format specifier requires signed argument");
+  EXPECT_EQ(" 42", fmt::format("{0: }", 42l));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 42ul), format_error,
+                   "format specifier requires signed argument");
+  EXPECT_EQ(" 42", fmt::format("{0: }", 42ll));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 42ull), format_error,
+                   "format specifier requires signed argument");
+  EXPECT_EQ(" 42", fmt::format("{0: }", 42.0));
+  EXPECT_EQ(" 42", fmt::format("{0: }", 42.0l));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: "), 'c'), format_error,
+                   "missing '}' in format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 'c'), format_error,
+                   "invalid format specifier for char");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), "abc"), format_error,
+                   "format specifier requires numeric argument");
+  EXPECT_THROW_MSG(
+      (void)fmt::format(runtime("{0: }"), reinterpret_cast<void*>(0x42)),
+      format_error, "format specifier requires numeric argument");
+}
+
+TEST(format_test, hash_flag) {
+  EXPECT_EQ("42", fmt::format("{0:#}", 42));
+  EXPECT_EQ("-42", fmt::format("{0:#}", -42));
+  EXPECT_EQ("0b101010", fmt::format("{0:#b}", 42));
+  EXPECT_EQ("0B101010", fmt::format("{0:#B}", 42));
+  EXPECT_EQ("-0b101010", fmt::format("{0:#b}", -42));
+  EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42));
+  EXPECT_EQ("0X42", fmt::format("{0:#X}", 0x42));
+  EXPECT_EQ("-0x42", fmt::format("{0:#x}", -0x42));
+  EXPECT_EQ("0", fmt::format("{0:#o}", 0));
+  EXPECT_EQ("042", fmt::format("{0:#o}", 042));
+  EXPECT_EQ("-042", fmt::format("{0:#o}", -042));
+  EXPECT_EQ("42", fmt::format("{0:#}", 42u));
+  EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42u));
+  EXPECT_EQ("042", fmt::format("{0:#o}", 042u));
+
+  EXPECT_EQ("-42", fmt::format("{0:#}", -42l));
+  EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42l));
+  EXPECT_EQ("-0x42", fmt::format("{0:#x}", -0x42l));
+  EXPECT_EQ("042", fmt::format("{0:#o}", 042l));
+  EXPECT_EQ("-042", fmt::format("{0:#o}", -042l));
+  EXPECT_EQ("42", fmt::format("{0:#}", 42ul));
+  EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42ul));
+  EXPECT_EQ("042", fmt::format("{0:#o}", 042ul));
+
+  EXPECT_EQ("-42", fmt::format("{0:#}", -42ll));
+  EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42ll));
+  EXPECT_EQ("-0x42", fmt::format("{0:#x}", -0x42ll));
+  EXPECT_EQ("042", fmt::format("{0:#o}", 042ll));
+  EXPECT_EQ("-042", fmt::format("{0:#o}", -042ll));
+  EXPECT_EQ("42", fmt::format("{0:#}", 42ull));
+  EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42ull));
+  EXPECT_EQ("042", fmt::format("{0:#o}", 042ull));
+
+  EXPECT_EQ("-42.0", fmt::format("{0:#}", -42.0));
+  EXPECT_EQ("-42.0", fmt::format("{0:#}", -42.0l));
+  EXPECT_EQ("4.e+01", fmt::format("{:#.0e}", 42.0));
+  EXPECT_EQ("0.", fmt::format("{:#.0f}", 0.01));
+  EXPECT_EQ("0.50", fmt::format("{:#.2g}", 0.5));
+  EXPECT_EQ("0.", fmt::format("{:#.0f}", 0.5));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:#"), 'c'), format_error,
+                   "missing '}' in format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:#}"), 'c'), format_error,
+                   "invalid format specifier for char");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:#}"), "abc"), format_error,
+                   "format specifier requires numeric argument");
+  EXPECT_THROW_MSG(
+      (void)fmt::format(runtime("{0:#}"), reinterpret_cast<void*>(0x42)),
+      format_error, "format specifier requires numeric argument");
+}
+
+TEST(format_test, zero_flag) {
+  EXPECT_EQ("42", fmt::format("{0:0}", 42));
+  EXPECT_EQ("-0042", fmt::format("{0:05}", -42));
+  EXPECT_EQ("00042", fmt::format("{0:05}", 42u));
+  EXPECT_EQ("-0042", fmt::format("{0:05}", -42l));
+  EXPECT_EQ("00042", fmt::format("{0:05}", 42ul));
+  EXPECT_EQ("-0042", fmt::format("{0:05}", -42ll));
+  EXPECT_EQ("00042", fmt::format("{0:05}", 42ull));
+  EXPECT_EQ("-000042", fmt::format("{0:07}", -42.0));
+  EXPECT_EQ("-000042", fmt::format("{0:07}", -42.0l));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:0"), 'c'), format_error,
+                   "missing '}' in format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:05}"), 'c'), format_error,
+                   "invalid format specifier for char");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:05}"), "abc"), format_error,
+                   "format specifier requires numeric argument");
+  EXPECT_THROW_MSG(
+      (void)fmt::format(runtime("{0:05}"), reinterpret_cast<void*>(0x42)),
+      format_error, "format specifier requires numeric argument");
+}
+
+TEST(format_test, width) {
+  char format_str[buffer_size];
+  safe_sprintf(format_str, "{0:%u", UINT_MAX);
+  increment(format_str + 3);
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "number is too big");
+  size_t size = std::strlen(format_str);
+  format_str[size] = '}';
+  format_str[size + 1] = 0;
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "number is too big");
+
+  safe_sprintf(format_str, "{0:%u", INT_MAX + 1u);
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "number is too big");
+  safe_sprintf(format_str, "{0:%u}", INT_MAX + 1u);
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "number is too big");
+  EXPECT_EQ(" -42", fmt::format("{0:4}", -42));
+  EXPECT_EQ("   42", fmt::format("{0:5}", 42u));
+  EXPECT_EQ("   -42", fmt::format("{0:6}", -42l));
+  EXPECT_EQ("     42", fmt::format("{0:7}", 42ul));
+  EXPECT_EQ("   -42", fmt::format("{0:6}", -42ll));
+  EXPECT_EQ("     42", fmt::format("{0:7}", 42ull));
+  EXPECT_EQ("   -1.23", fmt::format("{0:8}", -1.23));
+  EXPECT_EQ("    -1.23", fmt::format("{0:9}", -1.23l));
+  EXPECT_EQ("    0xcafe",
+            fmt::format("{0:10}", reinterpret_cast<void*>(0xcafe)));
+  EXPECT_EQ("x          ", fmt::format("{0:11}", 'x'));
+  EXPECT_EQ("str         ", fmt::format("{0:12}", "str"));
+  EXPECT_EQ(fmt::format("{:*^6}", "🤡"), "**🤡**");
+  EXPECT_EQ(fmt::format("{:*^8}", "你好"), "**你好**");
+  EXPECT_EQ(fmt::format("{:#6}", 42.0), "  42.0");
+  EXPECT_EQ(fmt::format("{:6c}", static_cast<int>('x')), "x     ");
+  EXPECT_EQ(fmt::format("{:>06.0f}", 0.00884311), "000000");
+}
+
+TEST(format_test, runtime_width) {
+  char format_str[buffer_size];
+  safe_sprintf(format_str, "{0:{%u", UINT_MAX);
+  increment(format_str + 4);
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "invalid format string");
+  size_t size = std::strlen(format_str);
+  format_str[size] = '}';
+  format_str[size + 1] = 0;
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "argument not found");
+  format_str[size + 1] = '}';
+  format_str[size + 2] = 0;
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "argument not found");
+
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{"), 0), format_error,
+                   "invalid format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{}"), 0), format_error,
+                   "cannot switch from manual to automatic argument indexing");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{?}}"), 0), format_error,
+                   "invalid format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0), format_error,
+                   "argument not found");
+
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{0:}}"), 0), format_error,
+                   "invalid format string");
+
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, -1), format_error,
+                   "negative width");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, (INT_MAX + 1u)),
+                   format_error, "number is too big");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, -1l), format_error,
+                   "negative width");
+  if (fmt::detail::const_check(sizeof(long) > sizeof(int))) {
+    long value = INT_MAX;
+    EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, (value + 1)),
+                     format_error, "number is too big");
+  }
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, (INT_MAX + 1ul)),
+                   format_error, "number is too big");
+
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, '0'), format_error,
+                   "width is not integer");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, 0.0), format_error,
+                   "width is not integer");
+
+  EXPECT_EQ(" -42", fmt::format("{0:{1}}", -42, 4));
+  EXPECT_EQ("   42", fmt::format("{0:{1}}", 42u, 5));
+  EXPECT_EQ("   -42", fmt::format("{0:{1}}", -42l, 6));
+  EXPECT_EQ("     42", fmt::format("{0:{1}}", 42ul, 7));
+  EXPECT_EQ("   -42", fmt::format("{0:{1}}", -42ll, 6));
+  EXPECT_EQ("     42", fmt::format("{0:{1}}", 42ull, 7));
+  EXPECT_EQ("   -1.23", fmt::format("{0:{1}}", -1.23, 8));
+  EXPECT_EQ("    -1.23", fmt::format("{0:{1}}", -1.23l, 9));
+  EXPECT_EQ("    0xcafe",
+            fmt::format("{0:{1}}", reinterpret_cast<void*>(0xcafe), 10));
+  EXPECT_EQ("x          ", fmt::format("{0:{1}}", 'x', 11));
+  EXPECT_EQ("str         ", fmt::format("{0:{1}}", "str", 12));
+}
+
+TEST(format_test, precision) {
+  char format_str[buffer_size];
+  safe_sprintf(format_str, "{0:.%u", UINT_MAX);
+  increment(format_str + 4);
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "number is too big");
+  size_t size = std::strlen(format_str);
+  format_str[size] = '}';
+  format_str[size + 1] = 0;
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "number is too big");
+
+  safe_sprintf(format_str, "{0:.%u", INT_MAX + 1u);
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "number is too big");
+  safe_sprintf(format_str, "{0:.%u}", INT_MAX + 1u);
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "number is too big");
+
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:."), 0), format_error,
+                   "missing precision specifier");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.}"), 0), format_error,
+                   "missing precision specifier");
+
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2"), 0), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42u), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42u), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42l), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42l), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42ul), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42ul), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42ll), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42ll), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42ull), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42ull), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:3.0}"), 'x'), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_EQ("1.2", fmt::format("{0:.2}", 1.2345));
+  EXPECT_EQ("1.2", fmt::format("{0:.2}", 1.2345l));
+  EXPECT_EQ("1.2e+56", fmt::format("{:.2}", 1.234e56));
+  EXPECT_EQ("1.1", fmt::format("{0:.3}", 1.1));
+  EXPECT_EQ("1e+00", fmt::format("{:.0e}", 1.0L));
+  EXPECT_EQ("  0.0e+00", fmt::format("{:9.1e}", 0.0));
+  EXPECT_EQ(
+      fmt::format("{:.494}", 4.9406564584124654E-324),
+      "4.9406564584124654417656879286822137236505980261432476442558568250067550"
+      "727020875186529983636163599237979656469544571773092665671035593979639877"
+      "479601078187812630071319031140452784581716784898210368871863605699873072"
+      "305000638740915356498438731247339727316961514003171538539807412623856559"
+      "117102665855668676818703956031062493194527159149245532930545654440112748"
+      "012970999954193198940908041656332452475714786901472678015935523861155013"
+      "480352649347201937902681071074917033322268447533357208324319361e-324");
+  EXPECT_EQ(
+      fmt::format("{:.1074f}", 1.1125369292536e-308),
+      "0.0000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000111253692925360019747947051741965785554081512200979"
+      "355021686109411883779182127659725163430929750364498219730822952552570601"
+      "152163505899912777129583674906301179059298598412303893909188340988729019"
+      "014361467448914817838555156840459458527907308695109202499990850735085304"
+      "478476991912072201449236975063640913461919914396877093174125167509869762"
+      "482369631100360266123742648159508919592746619553246586039571522788247697"
+      "156360766271842991667238355464496455107749716934387136380536472531224398"
+      "559833794807213172371254492216255558078524900147957309382830827524104234"
+      "530961756787819847850302379672357738807808384667004752163416921762619527"
+      "462847642037420991432005657440259928195996762610375541867198059294212446"
+      "81962777939941034720757232455434770912461317493580281734466552734375");
+
+  std::string outputs[] = {
+      "-0X1.41FE3FFE71C9E000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000P+127",
+      "-0XA.0FF1FFF38E4F0000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000000000000000000000000"
+      "000000000000000000000000000000000000000000000000000P+124"};
+  EXPECT_THAT(outputs,
+              testing::Contains(fmt::format("{:.838A}", -2.14001164E+38)));
+
+  EXPECT_EQ("123.", fmt::format("{:#.0f}", 123.0));
+  EXPECT_EQ("1.23", fmt::format("{:.02f}", 1.234));
+  EXPECT_EQ("0.001", fmt::format("{:.1g}", 0.001));
+  EXPECT_EQ("1019666400", fmt::format("{}", 1019666432.0f));
+  EXPECT_EQ("1e+01", fmt::format("{:.0e}", 9.5));
+  EXPECT_EQ("1.0e-34", fmt::format("{:.1e}", 1e-34));
+
+  EXPECT_THROW_MSG(
+      (void)fmt::format(runtime("{0:.2}"), reinterpret_cast<void*>(0xcafe)),
+      format_error, "precision not allowed for this argument type");
+  EXPECT_THROW_MSG(
+      (void)fmt::format(runtime("{0:.2f}"), reinterpret_cast<void*>(0xcafe)),
+      format_error, "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:.{}e}"), 42.0,
+                                     fmt::detail::max_value<int>()),
+                   format_error, "number is too big");
+  EXPECT_THROW_MSG(
+      (void)fmt::format("{:.2147483646f}", -2.2121295195081227E+304),
+      format_error, "number is too big");
+
+  EXPECT_EQ("st", fmt::format("{0:.2}", "str"));
+}
+
+TEST(format_test, runtime_precision) {
+  char format_str[buffer_size];
+  safe_sprintf(format_str, "{0:.{%u", UINT_MAX);
+  increment(format_str + 5);
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "invalid format string");
+  size_t size = std::strlen(format_str);
+  format_str[size] = '}';
+  format_str[size + 1] = 0;
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "argument not found");
+  format_str[size + 1] = '}';
+  format_str[size + 2] = 0;
+  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
+                   "argument not found");
+
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{"), 0), format_error,
+                   "invalid format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{}"), 0), format_error,
+                   "cannot switch from manual to automatic argument indexing");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{?}}"), 0), format_error,
+                   "invalid format string");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}"), 0, 0), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0), format_error,
+                   "argument not found");
+
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{0:}}"), 0), format_error,
+                   "invalid format string");
+
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, -1), format_error,
+                   "negative precision");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, (INT_MAX + 1u)),
+                   format_error, "number is too big");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, -1l), format_error,
+                   "negative precision");
+  if (fmt::detail::const_check(sizeof(long) > sizeof(int))) {
+    long value = INT_MAX;
+    EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, (value + 1)),
+                     format_error, "number is too big");
+  }
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, (INT_MAX + 1ul)),
+                   format_error, "number is too big");
+
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, '0'), format_error,
+                   "precision is not integer");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, 0.0), format_error,
+                   "precision is not integer");
+
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42, 2), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42, 2), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42u, 2), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42u, 2),
+                   format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42l, 2), format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42l, 2),
+                   format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42ul, 2),
+                   format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42ul, 2),
+                   format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42ll, 2),
+                   format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42ll, 2),
+                   format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42ull, 2),
+                   format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42ull, 2),
+                   format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:3.{1}}"), 'x', 0),
+                   format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_EQ("1.2", fmt::format("{0:.{1}}", 1.2345, 2));
+  EXPECT_EQ("1.2", fmt::format("{1:.{0}}", 2, 1.2345l));
+
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"),
+                                     reinterpret_cast<void*>(0xcafe), 2),
+                   format_error,
+                   "precision not allowed for this argument type");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"),
+                                     reinterpret_cast<void*>(0xcafe), 2),
+                   format_error,
+                   "precision not allowed for this argument type");
+
+  EXPECT_EQ("st", fmt::format("{0:.{1}}", "str", 2));
+}
+
+TEST(format_test, format_bool) {
+  EXPECT_EQ("true", fmt::format("{}", true));
+  EXPECT_EQ("false", fmt::format("{}", false));
+  EXPECT_EQ("1", fmt::format("{:d}", true));
+  EXPECT_EQ("true ", fmt::format("{:5}", true));
+  EXPECT_EQ("true", fmt::format("{:s}", true));
+  EXPECT_EQ("false", fmt::format("{:s}", false));
+  EXPECT_EQ("false ", fmt::format("{:6s}", false));
+}
+
+TEST(format_test, format_short) {
+  short s = 42;
+  EXPECT_EQ("42", fmt::format("{0:d}", s));
+  unsigned short us = 42;
+  EXPECT_EQ("42", fmt::format("{0:d}", us));
+}
+
+template <typename T>
+void check_unknown_types(const T& value, const char* types, const char*) {
+  char format_str[buffer_size];
+  const char* special = ".0123456789L}";
+  for (int i = CHAR_MIN; i <= CHAR_MAX; ++i) {
+    char c = static_cast<char>(i);
+    if (std::strchr(types, c) || std::strchr(special, c) || !c) continue;
+    safe_sprintf(format_str, "{0:10%c}", c);
+    const char* message = "invalid type specifier";
+    EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), value),
+                     format_error, message)
+        << format_str << " " << message;
+  }
+}
+
+TEST(format_test, format_int) {
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:v"), 42), format_error,
+                   "invalid type specifier");
+  check_unknown_types(42, "bBdoxXnLc", "integer");
+  EXPECT_EQ("x", fmt::format("{:c}", static_cast<int>('x')));
+}
+
+TEST(format_test, format_bin) {
+  EXPECT_EQ("0", fmt::format("{0:b}", 0));
+  EXPECT_EQ("101010", fmt::format("{0:b}", 42));
+  EXPECT_EQ("101010", fmt::format("{0:b}", 42u));
+  EXPECT_EQ("-101010", fmt::format("{0:b}", -42));
+  EXPECT_EQ("11000000111001", fmt::format("{0:b}", 12345));
+  EXPECT_EQ("10010001101000101011001111000", fmt::format("{0:b}", 0x12345678));
+  EXPECT_EQ("10010000101010111100110111101111",
+            fmt::format("{0:b}", 0x90ABCDEF));
+  EXPECT_EQ("11111111111111111111111111111111",
+            fmt::format("{0:b}", max_value<uint32_t>()));
+}
+
+#if FMT_USE_INT128
+constexpr auto int128_max = static_cast<__int128_t>(
+    (static_cast<__uint128_t>(1) << ((__SIZEOF_INT128__ * CHAR_BIT) - 1)) - 1);
+constexpr auto int128_min = -int128_max - 1;
+
+constexpr auto uint128_max = ~static_cast<__uint128_t>(0);
+#endif
+
+TEST(format_test, format_dec) {
+  EXPECT_EQ("0", fmt::format("{0}", 0));
+  EXPECT_EQ("42", fmt::format("{0}", 42));
+  EXPECT_EQ("42", fmt::format("{0:d}", 42));
+  EXPECT_EQ("42", fmt::format("{0}", 42u));
+  EXPECT_EQ("-42", fmt::format("{0}", -42));
+  EXPECT_EQ("12345", fmt::format("{0}", 12345));
+  EXPECT_EQ("67890", fmt::format("{0}", 67890));
+#if FMT_USE_INT128
+  EXPECT_EQ("0", fmt::format("{0}", static_cast<__int128_t>(0)));
+  EXPECT_EQ("0", fmt::format("{0}", static_cast<__uint128_t>(0)));
+  EXPECT_EQ("9223372036854775808",
+            fmt::format("{0}", static_cast<__int128_t>(INT64_MAX) + 1));
+  EXPECT_EQ("-9223372036854775809",
+            fmt::format("{0}", static_cast<__int128_t>(INT64_MIN) - 1));
+  EXPECT_EQ("18446744073709551616",
+            fmt::format("{0}", static_cast<__int128_t>(UINT64_MAX) + 1));
+  EXPECT_EQ("170141183460469231731687303715884105727",
+            fmt::format("{0}", int128_max));
+  EXPECT_EQ("-170141183460469231731687303715884105728",
+            fmt::format("{0}", int128_min));
+  EXPECT_EQ("340282366920938463463374607431768211455",
+            fmt::format("{0}", uint128_max));
+#endif
+
+  char buffer[buffer_size];
+  safe_sprintf(buffer, "%d", INT_MIN);
+  EXPECT_EQ(buffer, fmt::format("{0}", INT_MIN));
+  safe_sprintf(buffer, "%d", INT_MAX);
+  EXPECT_EQ(buffer, fmt::format("{0}", INT_MAX));
+  safe_sprintf(buffer, "%u", UINT_MAX);
+  EXPECT_EQ(buffer, fmt::format("{0}", UINT_MAX));
+  safe_sprintf(buffer, "%ld", 0 - static_cast<unsigned long>(LONG_MIN));
+  EXPECT_EQ(buffer, fmt::format("{0}", LONG_MIN));
+  safe_sprintf(buffer, "%ld", LONG_MAX);
+  EXPECT_EQ(buffer, fmt::format("{0}", LONG_MAX));
+  safe_sprintf(buffer, "%lu", ULONG_MAX);
+  EXPECT_EQ(buffer, fmt::format("{0}", ULONG_MAX));
+}
+
+TEST(format_test, format_hex) {
+  EXPECT_EQ("0", fmt::format("{0:x}", 0));
+  EXPECT_EQ("42", fmt::format("{0:x}", 0x42));
+  EXPECT_EQ("42", fmt::format("{0:x}", 0x42u));
+  EXPECT_EQ("-42", fmt::format("{0:x}", -0x42));
+  EXPECT_EQ("12345678", fmt::format("{0:x}", 0x12345678));
+  EXPECT_EQ("90abcdef", fmt::format("{0:x}", 0x90abcdef));
+  EXPECT_EQ("12345678", fmt::format("{0:X}", 0x12345678));
+  EXPECT_EQ("90ABCDEF", fmt::format("{0:X}", 0x90ABCDEF));
+#if FMT_USE_INT128
+  EXPECT_EQ("0", fmt::format("{0:x}", static_cast<__int128_t>(0)));
+  EXPECT_EQ("0", fmt::format("{0:x}", static_cast<__uint128_t>(0)));
+  EXPECT_EQ("8000000000000000",
+            fmt::format("{0:x}", static_cast<__int128_t>(INT64_MAX) + 1));
+  EXPECT_EQ("-8000000000000001",
+            fmt::format("{0:x}", static_cast<__int128_t>(INT64_MIN) - 1));
+  EXPECT_EQ("10000000000000000",
+            fmt::format("{0:x}", static_cast<__int128_t>(UINT64_MAX) + 1));
+  EXPECT_EQ("7fffffffffffffffffffffffffffffff",
+            fmt::format("{0:x}", int128_max));
+  EXPECT_EQ("-80000000000000000000000000000000",
+            fmt::format("{0:x}", int128_min));
+  EXPECT_EQ("ffffffffffffffffffffffffffffffff",
+            fmt::format("{0:x}", uint128_max));
+#endif
+
+  char buffer[buffer_size];
+  safe_sprintf(buffer, "-%x", 0 - static_cast<unsigned>(INT_MIN));
+  EXPECT_EQ(buffer, fmt::format("{0:x}", INT_MIN));
+  safe_sprintf(buffer, "%x", INT_MAX);
+  EXPECT_EQ(buffer, fmt::format("{0:x}", INT_MAX));
+  safe_sprintf(buffer, "%x", UINT_MAX);
+  EXPECT_EQ(buffer, fmt::format("{0:x}", UINT_MAX));
+  safe_sprintf(buffer, "-%lx", 0 - static_cast<unsigned long>(LONG_MIN));
+  EXPECT_EQ(buffer, fmt::format("{0:x}", LONG_MIN));
+  safe_sprintf(buffer, "%lx", LONG_MAX);
+  EXPECT_EQ(buffer, fmt::format("{0:x}", LONG_MAX));
+  safe_sprintf(buffer, "%lx", ULONG_MAX);
+  EXPECT_EQ(buffer, fmt::format("{0:x}", ULONG_MAX));
+}
+
+TEST(format_test, format_oct) {
+  EXPECT_EQ("0", fmt::format("{0:o}", 0));
+  EXPECT_EQ("42", fmt::format("{0:o}", 042));
+  EXPECT_EQ("42", fmt::format("{0:o}", 042u));
+  EXPECT_EQ("-42", fmt::format("{0:o}", -042));
+  EXPECT_EQ("12345670", fmt::format("{0:o}", 012345670));
+#if FMT_USE_INT128
+  EXPECT_EQ("0", fmt::format("{0:o}", static_cast<__int128_t>(0)));
+  EXPECT_EQ("0", fmt::format("{0:o}", static_cast<__uint128_t>(0)));
+  EXPECT_EQ("1000000000000000000000",
+            fmt::format("{0:o}", static_cast<__int128_t>(INT64_MAX) + 1));
+  EXPECT_EQ("-1000000000000000000001",
+            fmt::format("{0:o}", static_cast<__int128_t>(INT64_MIN) - 1));
+  EXPECT_EQ("2000000000000000000000",
+            fmt::format("{0:o}", static_cast<__int128_t>(UINT64_MAX) + 1));
+  EXPECT_EQ("1777777777777777777777777777777777777777777",
+            fmt::format("{0:o}", int128_max));
+  EXPECT_EQ("-2000000000000000000000000000000000000000000",
+            fmt::format("{0:o}", int128_min));
+  EXPECT_EQ("3777777777777777777777777777777777777777777",
+            fmt::format("{0:o}", uint128_max));
+#endif
+
+  char buffer[buffer_size];
+  safe_sprintf(buffer, "-%o", 0 - static_cast<unsigned>(INT_MIN));
+  EXPECT_EQ(buffer, fmt::format("{0:o}", INT_MIN));
+  safe_sprintf(buffer, "%o", INT_MAX);
+  EXPECT_EQ(buffer, fmt::format("{0:o}", INT_MAX));
+  safe_sprintf(buffer, "%o", UINT_MAX);
+  EXPECT_EQ(buffer, fmt::format("{0:o}", UINT_MAX));
+  safe_sprintf(buffer, "-%lo", 0 - static_cast<unsigned long>(LONG_MIN));
+  EXPECT_EQ(buffer, fmt::format("{0:o}", LONG_MIN));
+  safe_sprintf(buffer, "%lo", LONG_MAX);
+  EXPECT_EQ(buffer, fmt::format("{0:o}", LONG_MAX));
+  safe_sprintf(buffer, "%lo", ULONG_MAX);
+  EXPECT_EQ(buffer, fmt::format("{0:o}", ULONG_MAX));
+}
+
+TEST(format_test, format_int_locale) {
+  EXPECT_EQ("1234", fmt::format("{:L}", 1234));
+}
+
+TEST(format_test, format_float) {
+  EXPECT_EQ("0", fmt::format("{}", 0.0f));
+  EXPECT_EQ("392.500000", fmt::format("{0:f}", 392.5f));
+}
+
+TEST(format_test, format_double) {
+  EXPECT_EQ("0", fmt::format("{}", 0.0));
+  check_unknown_types(1.2, "eEfFgGaAnL%", "double");
+  EXPECT_EQ("0", fmt::format("{:}", 0.0));
+  EXPECT_EQ("0.000000", fmt::format("{:f}", 0.0));
+  EXPECT_EQ("0", fmt::format("{:g}", 0.0));
+  EXPECT_EQ("392.65", fmt::format("{:}", 392.65));
+  EXPECT_EQ("392.65", fmt::format("{:g}", 392.65));
+  EXPECT_EQ("392.65", fmt::format("{:G}", 392.65));
+  EXPECT_EQ("4.9014e+06", fmt::format("{:g}", 4.9014e6));
+  EXPECT_EQ("392.650000", fmt::format("{:f}", 392.65));
+  EXPECT_EQ("392.650000", fmt::format("{:F}", 392.65));
+  EXPECT_EQ("42", fmt::format("{:L}", 42.0));
+  EXPECT_EQ("    0x1.0cccccccccccdp+2", fmt::format("{:24a}", 4.2));
+  EXPECT_EQ("0x1.0cccccccccccdp+2    ", fmt::format("{:<24a}", 4.2));
+  char buffer[buffer_size];
+  safe_sprintf(buffer, "%e", 392.65);
+  EXPECT_EQ(buffer, fmt::format("{0:e}", 392.65));
+  safe_sprintf(buffer, "%E", 392.65);
+  EXPECT_EQ(buffer, fmt::format("{0:E}", 392.65));
+  EXPECT_EQ("+0000392.6", fmt::format("{0:+010.4g}", 392.65));
+  safe_sprintf(buffer, "%a", -42.0);
+  EXPECT_EQ(buffer, fmt::format("{:a}", -42.0));
+  safe_sprintf(buffer, "%A", -42.0);
+  EXPECT_EQ(buffer, fmt::format("{:A}", -42.0));
+  EXPECT_EQ("9223372036854775808.000000",
+            fmt::format("{:f}", 9223372036854775807.0));
+}
+
+TEST(format_test, precision_rounding) {
+  EXPECT_EQ("0", fmt::format("{:.0f}", 0.0));
+  EXPECT_EQ("0", fmt::format("{:.0f}", 0.01));
+  EXPECT_EQ("0", fmt::format("{:.0f}", 0.1));
+  EXPECT_EQ("0.000", fmt::format("{:.3f}", 0.00049));
+  EXPECT_EQ("0.001", fmt::format("{:.3f}", 0.0005));
+  EXPECT_EQ("0.001", fmt::format("{:.3f}", 0.00149));
+  EXPECT_EQ("0.002", fmt::format("{:.3f}", 0.0015));
+  EXPECT_EQ("1.000", fmt::format("{:.3f}", 0.9999));
+  EXPECT_EQ("0.00123", fmt::format("{:.3}", 0.00123));
+  EXPECT_EQ("0.1", fmt::format("{:.16g}", 0.1));
+  EXPECT_EQ("1", fmt::format("{:.0}", 1.0));
+  EXPECT_EQ("225.51575035152063720",
+            fmt::format("{:.17f}", 225.51575035152064));
+  EXPECT_EQ("-761519619559038.2", fmt::format("{:.1f}", -761519619559038.2));
+  EXPECT_EQ("1.9156918820264798e-56",
+            fmt::format("{}", 1.9156918820264798e-56));
+  EXPECT_EQ("0.0000", fmt::format("{:.4f}", 7.2809479766055470e-15));
+
+  // Trigger a rounding error in Grisu by a specially chosen number.
+  EXPECT_EQ("3788512123356.985352", fmt::format("{:f}", 3788512123356.985352));
+}
+
+TEST(format_test, prettify_float) {
+  EXPECT_EQ("0.0001", fmt::format("{}", 1e-4));
+  EXPECT_EQ("1e-05", fmt::format("{}", 1e-5));
+  EXPECT_EQ("1000000000000000", fmt::format("{}", 1e15));
+  EXPECT_EQ("1e+16", fmt::format("{}", 1e16));
+  EXPECT_EQ("9.999e-05", fmt::format("{}", 9.999e-5));
+  EXPECT_EQ("10000000000", fmt::format("{}", 1e10));
+  EXPECT_EQ("100000000000", fmt::format("{}", 1e11));
+  EXPECT_EQ("12340000000", fmt::format("{}", 1234e7));
+  EXPECT_EQ("12.34", fmt::format("{}", 1234e-2));
+  EXPECT_EQ("0.001234", fmt::format("{}", 1234e-6));
+  EXPECT_EQ("0.1", fmt::format("{}", 0.1f));
+  EXPECT_EQ("0.10000000149011612", fmt::format("{}", double(0.1f)));
+  EXPECT_EQ("1.3563156e-19", fmt::format("{}", 1.35631564e-19f));
+}
+
+TEST(format_test, format_nan) {
+  double nan = std::numeric_limits<double>::quiet_NaN();
+  EXPECT_EQ("nan", fmt::format("{}", nan));
+  EXPECT_EQ("+nan", fmt::format("{:+}", nan));
+  EXPECT_EQ("  +nan", fmt::format("{:+06}", nan));
+  EXPECT_EQ("+nan  ", fmt::format("{:<+06}", nan));
+  EXPECT_EQ(" +nan ", fmt::format("{:^+06}", nan));
+  EXPECT_EQ("  +nan", fmt::format("{:>+06}", nan));
+  if (std::signbit(-nan)) {
+    EXPECT_EQ("-nan", fmt::format("{}", -nan));
+    EXPECT_EQ("  -nan", fmt::format("{:+06}", -nan));
+  } else {
+    fmt::print("Warning: compiler doesn't handle negative NaN correctly");
+  }
+  EXPECT_EQ(" nan", fmt::format("{: }", nan));
+  EXPECT_EQ("NAN", fmt::format("{:F}", nan));
+  EXPECT_EQ("nan    ", fmt::format("{:<7}", nan));
+  EXPECT_EQ("  nan  ", fmt::format("{:^7}", nan));
+  EXPECT_EQ("    nan", fmt::format("{:>7}", nan));
+}
+
+TEST(format_test, format_infinity) {
+  double inf = std::numeric_limits<double>::infinity();
+  EXPECT_EQ("inf", fmt::format("{}", inf));
+  EXPECT_EQ("+inf", fmt::format("{:+}", inf));
+  EXPECT_EQ("-inf", fmt::format("{}", -inf));
+  EXPECT_EQ("  +inf", fmt::format("{:+06}", inf));
+  EXPECT_EQ("  -inf", fmt::format("{:+06}", -inf));
+  EXPECT_EQ("+inf  ", fmt::format("{:<+06}", inf));
+  EXPECT_EQ(" +inf ", fmt::format("{:^+06}", inf));
+  EXPECT_EQ("  +inf", fmt::format("{:>+06}", inf));
+  EXPECT_EQ(" inf", fmt::format("{: }", inf));
+  EXPECT_EQ("INF", fmt::format("{:F}", inf));
+  EXPECT_EQ("inf    ", fmt::format("{:<7}", inf));
+  EXPECT_EQ("  inf  ", fmt::format("{:^7}", inf));
+  EXPECT_EQ("    inf", fmt::format("{:>7}", inf));
+}
+
+TEST(format_test, format_long_double) {
+  EXPECT_EQ("0", fmt::format("{0:}", 0.0l));
+  EXPECT_EQ("0.000000", fmt::format("{0:f}", 0.0l));
+  EXPECT_EQ("392.65", fmt::format("{0:}", 392.65l));
+  EXPECT_EQ("392.65", fmt::format("{0:g}", 392.65l));
+  EXPECT_EQ("392.65", fmt::format("{0:G}", 392.65l));
+  EXPECT_EQ("392.650000", fmt::format("{0:f}", 392.65l));
+  EXPECT_EQ("392.650000", fmt::format("{0:F}", 392.65l));
+  char buffer[buffer_size];
+  safe_sprintf(buffer, "%Le", 392.65l);
+  EXPECT_EQ(buffer, fmt::format("{0:e}", 392.65l));
+  EXPECT_EQ("+0000392.6", fmt::format("{0:+010.4g}", 392.64l));
+  safe_sprintf(buffer, "%La", 3.31l);
+  EXPECT_EQ(buffer, fmt::format("{:a}", 3.31l));
+}
+
+TEST(format_test, format_char) {
+  const char types[] = "cbBdoxX";
+  check_unknown_types('a', types, "char");
+  EXPECT_EQ("a", fmt::format("{0}", 'a'));
+  EXPECT_EQ("z", fmt::format("{0:c}", 'z'));
+  int n = 'x';
+  for (const char* type = types + 1; *type; ++type) {
+    std::string format_str = fmt::format("{{:{}}}", *type);
+    EXPECT_EQ(fmt::format(runtime(format_str), n),
+              fmt::format(runtime(format_str), 'x'))
+        << format_str;
+  }
+  EXPECT_EQ(fmt::format("{:02X}", n), fmt::format("{:02X}", 'x'));
+}
+
+TEST(format_test, format_volatile_char) {
+  volatile char c = 'x';
+  EXPECT_EQ("x", fmt::format("{}", c));
+}
+
+TEST(format_test, format_unsigned_char) {
+  EXPECT_EQ("42", fmt::format("{}", static_cast<unsigned char>(42)));
+  EXPECT_EQ("42", fmt::format("{}", static_cast<uint8_t>(42)));
+}
+
+TEST(format_test, format_cstring) {
+  check_unknown_types("test", "sp", "string");
+  EXPECT_EQ("test", fmt::format("{0}", "test"));
+  EXPECT_EQ("test", fmt::format("{0:s}", "test"));
+  char nonconst[] = "nonconst";
+  EXPECT_EQ("nonconst", fmt::format("{0}", nonconst));
+  EXPECT_THROW_MSG(
+      (void)fmt::format(runtime("{0}"), static_cast<const char*>(nullptr)),
+      format_error, "string pointer is null");
+}
+
+void function_pointer_test(int, double, std::string) {}
+
+TEST(format_test, format_pointer) {
+  check_unknown_types(reinterpret_cast<void*>(0x1234), "p", "pointer");
+  EXPECT_EQ("0x0", fmt::format("{0}", static_cast<void*>(nullptr)));
+  EXPECT_EQ("0x1234", fmt::format("{0}", reinterpret_cast<void*>(0x1234)));
+  EXPECT_EQ("0x1234", fmt::format("{0:p}", reinterpret_cast<void*>(0x1234)));
+  EXPECT_EQ("0x" + std::string(sizeof(void*) * CHAR_BIT / 4, 'f'),
+            fmt::format("{0}", reinterpret_cast<void*>(~uintptr_t())));
+  EXPECT_EQ("0x1234",
+            fmt::format("{}", fmt::ptr(reinterpret_cast<int*>(0x1234))));
+  std::unique_ptr<int> up(new int(1));
+  EXPECT_EQ(fmt::format("{}", fmt::ptr(up.get())),
+            fmt::format("{}", fmt::ptr(up)));
+  std::shared_ptr<int> sp(new int(1));
+  EXPECT_EQ(fmt::format("{}", fmt::ptr(sp.get())),
+            fmt::format("{}", fmt::ptr(sp)));
+  EXPECT_EQ(fmt::format("{}", fmt::detail::bit_cast<const void*>(
+                                  &function_pointer_test)),
+            fmt::format("{}", fmt::ptr(function_pointer_test)));
+  EXPECT_EQ("0x0", fmt::format("{}", nullptr));
+}
+
+TEST(format_test, format_string) {
+  EXPECT_EQ("test", fmt::format("{0}", std::string("test")));
+  EXPECT_THROW((void)fmt::format(fmt::runtime("{:x}"), std::string("test")),
+               fmt::format_error);
+}
+
+TEST(format_test, format_string_view) {
+  EXPECT_EQ("test", fmt::format("{}", string_view("test")));
+  EXPECT_EQ("", fmt::format("{}", string_view()));
+}
+
+#ifdef FMT_USE_STRING_VIEW
+struct string_viewable {};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<string_viewable> : formatter<std::string_view> {
+  auto format(string_viewable, format_context& ctx) -> decltype(ctx.out()) {
+    return formatter<std::string_view>::format("foo", ctx);
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(format_test, format_std_string_view) {
+  EXPECT_EQ("test", fmt::format("{}", std::string_view("test")));
+  EXPECT_EQ("foo", fmt::format("{}", string_viewable()));
+}
+
+struct explicitly_convertible_to_std_string_view {
+  explicit operator std::string_view() const { return "foo"; }
+};
+
+template <>
+struct fmt::formatter<explicitly_convertible_to_std_string_view>
+    : formatter<std::string_view> {
+  auto format(explicitly_convertible_to_std_string_view v, format_context& ctx)
+      -> decltype(ctx.out()) {
+    return format_to(ctx.out(), "'{}'", std::string_view(v));
+  }
+};
+
+TEST(format_test, format_explicitly_convertible_to_std_string_view) {
+  EXPECT_EQ("'foo'",
+            fmt::format("{}", explicitly_convertible_to_std_string_view()));
+}
+#endif
+
+struct converible_to_anything {
+  template <typename T> operator T() const { return T(); }
+};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<converible_to_anything> {
+  FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  auto format(converible_to_anything, format_context& ctx)
+      -> decltype(ctx.out()) {
+    return format_to(ctx.out(), "foo");
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(format_test, format_convertible_to_anything) {
+  EXPECT_EQ("foo", fmt::format("{}", converible_to_anything()));
+}
+
+class Answer {};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<date> {
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    auto it = ctx.begin();
+    if (it != ctx.end() && *it == 'd') ++it;
+    return it;
+  }
+
+  auto format(const date& d, format_context& ctx) -> decltype(ctx.out()) {
+    format_to(ctx.out(), "{}-{}-{}", d.year(), d.month(), d.day());
+    return ctx.out();
+  }
+};
+
+template <> struct formatter<Answer> : formatter<int> {
+  template <typename FormatContext>
+  auto format(Answer, FormatContext& ctx) -> decltype(ctx.out()) {
+    return formatter<int>::format(42, ctx);
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(format_test, format_custom) {
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:s}"), date(2012, 12, 9)),
+                   format_error, "unknown format specifier");
+  EXPECT_EQ("42", fmt::format("{0}", Answer()));
+  EXPECT_EQ("0042", fmt::format("{:04}", Answer()));
+}
+
+TEST(format_test, format_to_custom) {
+  char buf[10] = {};
+  auto end =
+      &*fmt::format_to(fmt::detail::make_checked(buf, 10), "{}", Answer());
+  EXPECT_EQ(end, buf + 2);
+  EXPECT_STREQ(buf, "42");
+}
+
+TEST(format_test, format_string_from_speed_test) {
+  EXPECT_EQ("1.2340000000:0042:+3.13:str:0x3e8:X:%",
+            fmt::format("{0:0.10f}:{1:04}:{2:+g}:{3}:{4}:{5}:%", 1.234, 42,
+                        3.13, "str", reinterpret_cast<void*>(1000), 'X'));
+}
+
+TEST(format_test, format_examples) {
+  std::string message = fmt::format("The answer is {}", 42);
+  EXPECT_EQ("The answer is 42", message);
+
+  EXPECT_EQ("42", fmt::format("{}", 42));
+
+  memory_buffer out;
+  format_to(std::back_inserter(out), "The answer is {}.", 42);
+  EXPECT_EQ("The answer is 42.", to_string(out));
+
+  const char* filename = "nonexistent";
+  FILE* ftest = safe_fopen(filename, "r");
+  if (ftest) fclose(ftest);
+  int error_code = errno;
+  EXPECT_TRUE(ftest == nullptr);
+  EXPECT_SYSTEM_ERROR(
+      {
+        FILE* f = safe_fopen(filename, "r");
+        if (!f)
+          throw fmt::system_error(errno, "Cannot open file '{}'", filename);
+        fclose(f);
+      },
+      error_code, "Cannot open file 'nonexistent'");
+
+  EXPECT_EQ("First, thou shalt count to three",
+            fmt::format("First, thou shalt count to {0}", "three"));
+  EXPECT_EQ("Bring me a shrubbery", fmt::format("Bring me a {}", "shrubbery"));
+  EXPECT_EQ("From 1 to 3", fmt::format("From {} to {}", 1, 3));
+
+  char buffer[buffer_size];
+  safe_sprintf(buffer, "%03.2f", -1.2);
+  EXPECT_EQ(buffer, fmt::format("{:03.2f}", -1.2));
+
+  EXPECT_EQ("a, b, c", fmt::format("{0}, {1}, {2}", 'a', 'b', 'c'));
+  EXPECT_EQ("a, b, c", fmt::format("{}, {}, {}", 'a', 'b', 'c'));
+  EXPECT_EQ("c, b, a", fmt::format("{2}, {1}, {0}", 'a', 'b', 'c'));
+  EXPECT_EQ("abracadabra", fmt::format("{0}{1}{0}", "abra", "cad"));
+
+  EXPECT_EQ("left aligned                  ",
+            fmt::format("{:<30}", "left aligned"));
+  EXPECT_EQ("                 right aligned",
+            fmt::format("{:>30}", "right aligned"));
+  EXPECT_EQ("           centered           ",
+            fmt::format("{:^30}", "centered"));
+  EXPECT_EQ("***********centered***********",
+            fmt::format("{:*^30}", "centered"));
+
+  EXPECT_EQ("+3.140000; -3.140000", fmt::format("{:+f}; {:+f}", 3.14, -3.14));
+  EXPECT_EQ(" 3.140000; -3.140000", fmt::format("{: f}; {: f}", 3.14, -3.14));
+  EXPECT_EQ("3.140000; -3.140000", fmt::format("{:-f}; {:-f}", 3.14, -3.14));
+
+  EXPECT_EQ("int: 42;  hex: 2a;  oct: 52",
+            fmt::format("int: {0:d};  hex: {0:x};  oct: {0:o}", 42));
+  EXPECT_EQ("int: 42;  hex: 0x2a;  oct: 052",
+            fmt::format("int: {0:d};  hex: {0:#x};  oct: {0:#o}", 42));
+
+  EXPECT_EQ("The answer is 42", fmt::format("The answer is {}", 42));
+  EXPECT_THROW_MSG(
+      (void)fmt::format(runtime("The answer is {:d}"), "forty-two"),
+      format_error, "invalid type specifier");
+
+  EXPECT_WRITE(
+      stdout, fmt::print("{}", std::numeric_limits<double>::infinity()), "inf");
+}
+
+TEST(format_test, print) {
+  EXPECT_WRITE(stdout, fmt::print("Don't {}!", "panic"), "Don't panic!");
+  EXPECT_WRITE(stderr, fmt::print(stderr, "Don't {}!", "panic"),
+               "Don't panic!");
+}
+
+TEST(format_test, variadic) {
+  EXPECT_EQ("abc1", fmt::format("{}c{}", "ab", 1));
+}
+
+TEST(format_test, dynamic) {
+  using ctx = fmt::format_context;
+  auto args = std::vector<fmt::basic_format_arg<ctx>>();
+  args.emplace_back(fmt::detail::make_arg<ctx>(42));
+  args.emplace_back(fmt::detail::make_arg<ctx>("abc1"));
+  args.emplace_back(fmt::detail::make_arg<ctx>(1.5f));
+
+  std::string result = fmt::vformat(
+      "{} and {} and {}",
+      fmt::format_args(args.data(), static_cast<int>(args.size())));
+
+  EXPECT_EQ("42 and abc1 and 1.5", result);
+}
+
+TEST(format_test, bytes) {
+  auto s = fmt::format("{:10}", fmt::bytes("ёжик"));
+  EXPECT_EQ("ёжик  ", s);
+  EXPECT_EQ(10, s.size());
+}
+
+TEST(format_test, group_digits_view) {
+  EXPECT_EQ(fmt::format("{}", fmt::group_digits(10000000)), "10,000,000");
+  EXPECT_EQ(fmt::format("{:8}", fmt::group_digits(1000)), "   1,000");
+}
+
+enum test_enum { foo, bar };
+
+TEST(format_test, join) {
+  using fmt::join;
+  int v1[3] = {1, 2, 3};
+  auto v2 = std::vector<float>();
+  v2.push_back(1.2f);
+  v2.push_back(3.4f);
+  void* v3[2] = {&v1[0], &v1[1]};
+
+  EXPECT_EQ("(1, 2, 3)", fmt::format("({})", join(v1, v1 + 3, ", ")));
+  EXPECT_EQ("(1)", fmt::format("({})", join(v1, v1 + 1, ", ")));
+  EXPECT_EQ("()", fmt::format("({})", join(v1, v1, ", ")));
+  EXPECT_EQ("(001, 002, 003)", fmt::format("({:03})", join(v1, v1 + 3, ", ")));
+  EXPECT_EQ("(+01.20, +03.40)",
+            fmt::format("({:+06.2f})", join(v2.begin(), v2.end(), ", ")));
+
+  EXPECT_EQ("1, 2, 3", fmt::format("{0:{1}}", join(v1, v1 + 3, ", "), 1));
+
+  EXPECT_EQ(fmt::format("{}, {}", v3[0], v3[1]),
+            fmt::format("{}", join(v3, v3 + 2, ", ")));
+
+  EXPECT_EQ("(1, 2, 3)", fmt::format("({})", join(v1, ", ")));
+  EXPECT_EQ("(+01.20, +03.40)", fmt::format("({:+06.2f})", join(v2, ", ")));
+
+  auto v4 = std::vector<test_enum>{foo, bar, foo};
+  EXPECT_EQ("0 1 0", fmt::format("{}", join(v4, " ")));
+}
+
+#ifdef __cpp_lib_byte
+TEST(format_test, join_bytes) {
+  auto v = std::vector<std::byte>{std::byte(1), std::byte(2), std::byte(3)};
+  EXPECT_EQ("1, 2, 3", fmt::format("{}", fmt::join(v, ", ")));
+}
+#endif
+
+std::string vformat_message(int id, const char* format, fmt::format_args args) {
+  auto buffer = fmt::memory_buffer();
+  format_to(fmt::appender(buffer), "[{}] ", id);
+  vformat_to(fmt::appender(buffer), format, args);
+  return to_string(buffer);
+}
+
+template <typename... Args>
+std::string format_message(int id, const char* format, const Args&... args) {
+  auto va = fmt::make_format_args(args...);
+  return vformat_message(id, format, va);
+}
+
+TEST(format_test, format_message_example) {
+  EXPECT_EQ("[42] something happened",
+            format_message(42, "{} happened", "something"));
+}
+
+template <typename... Args>
+void print_error(const char* file, int line, const char* format,
+                 const Args&... args) {
+  fmt::print("{}: {}: ", file, line);
+  fmt::print(format, args...);
+}
+
+TEST(format_test, unpacked_args) {
+  EXPECT_EQ("0123456789abcdefg",
+            fmt::format("{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}", 0, 1, 2, 3, 4, 5,
+                        6, 7, 8, 9, 'a', 'b', 'c', 'd', 'e', 'f', 'g'));
+}
+
+struct string_like {};
+fmt::string_view to_string_view(string_like) { return "foo"; }
+
+constexpr char with_null[3] = {'{', '}', '\0'};
+constexpr char no_null[2] = {'{', '}'};
+static FMT_CONSTEXPR_DECL const char static_with_null[3] = {'{', '}', '\0'};
+static FMT_CONSTEXPR_DECL const char static_no_null[2] = {'{', '}'};
+
+TEST(format_test, compile_time_string) {
+  EXPECT_EQ("foo", fmt::format(FMT_STRING("foo")));
+  EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), 42));
+  EXPECT_EQ("foo", fmt::format(FMT_STRING("{}"), string_like()));
+
+#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+  using namespace fmt::literals;
+  EXPECT_EQ("foobar", fmt::format(FMT_STRING("{foo}{bar}"), "bar"_a = "bar",
+                                  "foo"_a = "foo"));
+  EXPECT_EQ("", fmt::format(FMT_STRING("")));
+  EXPECT_EQ("", fmt::format(FMT_STRING(""), "arg"_a = 42));
+#endif
+
+  (void)static_with_null;
+  (void)static_no_null;
+#ifndef _MSC_VER
+  EXPECT_EQ("42", fmt::format(FMT_STRING(static_with_null), 42));
+  EXPECT_EQ("42", fmt::format(FMT_STRING(static_no_null), 42));
+#endif
+
+  (void)with_null;
+  (void)no_null;
+#if __cplusplus >= 201703L
+  EXPECT_EQ("42", fmt::format(FMT_STRING(with_null), 42));
+  EXPECT_EQ("42", fmt::format(FMT_STRING(no_null), 42));
+#endif
+#if defined(FMT_USE_STRING_VIEW) && __cplusplus >= 201703L
+  EXPECT_EQ("42", fmt::format(FMT_STRING(std::string_view("{}")), 42));
+#endif
+}
+
+TEST(format_test, custom_format_compile_time_string) {
+  EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), Answer()));
+  auto answer = Answer();
+  EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), answer));
+  char buf[10] = {};
+  fmt::format_to(buf, FMT_STRING("{}"), answer);
+  const Answer const_answer = Answer();
+  EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), const_answer));
+}
+
+#if FMT_USE_USER_DEFINED_LITERALS
+// Passing user-defined literals directly to EXPECT_EQ causes problems
+// with macro argument stringification (#) on some versions of GCC.
+// Workaround: Assing the UDL result to a variable before the macro.
+
+using namespace fmt::literals;
+
+#  if FMT_GCC_VERSION
+#    define FMT_CHECK_DEPRECATED_UDL_FORMAT 1
+#  elif FMT_CLANG_VERSION && defined(__has_warning)
+#    if __has_warning("-Wdeprecated-declarations")
+#      define FMT_CHECK_DEPRECATED_UDL_FORMAT 1
+#    endif
+#  endif
+#  ifndef FMT_CHECK_DEPRECATED_UDL_FORMAT
+#    define FMT_CHECK_DEPRECATED_UDL_FORMAT 0
+#  endif
+
+#  if FMT_CHECK_DEPRECATED_UDL_FORMAT
+#    pragma GCC diagnostic push
+#    pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+
+TEST(format_test, format_udl) {
+  EXPECT_EQ("{}c{}"_format("ab", 1), fmt::format("{}c{}", "ab", 1));
+  EXPECT_EQ("foo"_format(), "foo");
+  EXPECT_EQ("{0:10}"_format(42), "        42");
+  EXPECT_EQ("{}"_format(date(2015, 10, 21)), "2015-10-21");
+}
+
+#    pragma GCC diagnostic pop
+#  endif
+
+TEST(format_test, named_arg_udl) {
+  auto udl_a = fmt::format("{first}{second}{first}{third}", "first"_a = "abra",
+                           "second"_a = "cad", "third"_a = 99);
+  EXPECT_EQ(
+      fmt::format("{first}{second}{first}{third}", fmt::arg("first", "abra"),
+                  fmt::arg("second", "cad"), fmt::arg("third", 99)),
+      udl_a);
+}
+#endif  // FMT_USE_USER_DEFINED_LITERALS
+
+TEST(format_test, enum) { EXPECT_EQ("0", fmt::format("{}", foo)); }
+
+TEST(format_test, formatter_not_specialized) {
+  static_assert(!fmt::has_formatter<fmt::formatter<test_enum>,
+                                    fmt::format_context>::value,
+                "");
+}
+
+#if FMT_HAS_FEATURE(cxx_strong_enums)
+enum big_enum : unsigned long long { big_enum_value = 5000000000ULL };
+
+TEST(format_test, strong_enum) {
+  EXPECT_EQ("5000000000", fmt::format("{}", big_enum_value));
+}
+#endif
+
+TEST(format_test, non_null_terminated_format_string) {
+  EXPECT_EQ("42", fmt::format(string_view("{}foo", 2), 42));
+}
+
+struct variant {
+  enum { int_type, string_type } type;
+  explicit variant(int) : type(int_type) {}
+  explicit variant(const char*) : type(string_type) {}
+};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<variant> : dynamic_formatter<> {
+  auto format(variant value, format_context& ctx) -> decltype(ctx.out()) {
+    if (value.type == variant::int_type)
+      return dynamic_formatter<>::format(42, ctx);
+    return dynamic_formatter<>::format("foo", ctx);
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(format_test, dynamic_formatter) {
+  auto num = variant(42);
+  auto str = variant("foo");
+  EXPECT_EQ("42", fmt::format("{:d}", num));
+  EXPECT_EQ("foo", fmt::format("{:s}", str));
+  EXPECT_EQ(" 42 foo ", fmt::format("{:{}} {:{}}", num, 3, str, 4));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{}}"), num), format_error,
+                   "cannot switch from manual to automatic argument indexing");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:{0}}"), num), format_error,
+                   "cannot switch from automatic to manual argument indexing");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:+}"), str), format_error,
+                   "format specifier requires numeric argument");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:-}"), str), format_error,
+                   "format specifier requires numeric argument");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{: }"), str), format_error,
+                   "format specifier requires numeric argument");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:#}"), str), format_error,
+                   "format specifier requires numeric argument");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:0}"), str), format_error,
+                   "format specifier requires numeric argument");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{:.2}"), num), format_error,
+                   "precision not allowed for this argument type");
+}
+
+namespace adl_test {
+namespace fmt {
+namespace detail {
+struct foo {};
+template <typename, typename OutputIt> void write(OutputIt, foo) = delete;
+}  // namespace detail
+}  // namespace fmt
+}  // namespace adl_test
+
+FMT_BEGIN_NAMESPACE
+template <>
+struct formatter<adl_test::fmt::detail::foo> : formatter<std::string> {
+  template <typename FormatContext>
+  auto format(adl_test::fmt::detail::foo, FormatContext& ctx)
+      -> decltype(ctx.out()) {
+    return formatter<std::string>::format("foo", ctx);
+  }
+};
+FMT_END_NAMESPACE
+
+struct convertible_to_int {
+  operator int() const { return value; }
+
+  int value = 42;
+};
+
+TEST(format_test, to_string) {
+  EXPECT_EQ(fmt::to_string(42), "42");
+  EXPECT_EQ(fmt::to_string(reinterpret_cast<void*>(0x1234)), "0x1234");
+  EXPECT_EQ(fmt::to_string(adl_test::fmt::detail::foo()), "foo");
+  EXPECT_EQ(fmt::to_string(convertible_to_int()), "42");
+
+  enum foo : unsigned char { zero };
+  EXPECT_EQ(fmt::to_string(zero), "0");
+}
+
+TEST(format_test, output_iterators) {
+  std::list<char> out;
+  fmt::format_to(std::back_inserter(out), "{}", 42);
+  EXPECT_EQ("42", std::string(out.begin(), out.end()));
+  std::stringstream s;
+  fmt::format_to(std::ostream_iterator<char>(s), "{}", 42);
+  EXPECT_EQ("42", s.str());
+}
+
+TEST(format_test, formatted_size) {
+  EXPECT_EQ(2u, fmt::formatted_size("{}", 42));
+}
+
+TEST(format_test, format_to_no_args) {
+  std::string s;
+  fmt::format_to(std::back_inserter(s), "test");
+  EXPECT_EQ("test", s);
+}
+
+TEST(format_test, format_to) {
+  std::string s;
+  fmt::format_to(std::back_inserter(s), "part{0}", 1);
+  EXPECT_EQ("part1", s);
+  fmt::format_to(std::back_inserter(s), "part{0}", 2);
+  EXPECT_EQ("part1part2", s);
+}
+
+TEST(format_test, format_to_memory_buffer) {
+  auto buf = fmt::basic_memory_buffer<char, 100>();
+  fmt::format_to(fmt::appender(buf), "{}", "foo");
+  EXPECT_EQ("foo", to_string(buf));
+}
+
+TEST(format_test, format_to_vector) {
+  std::vector<char> v;
+  fmt::format_to(std::back_inserter(v), "{}", "foo");
+  EXPECT_EQ(string_view(v.data(), v.size()), "foo");
+}
+
+struct nongrowing_container {
+  using value_type = char;
+  void push_back(char) { throw std::runtime_error("can't take it any more"); }
+};
+
+TEST(format_test, format_to_propagates_exceptions) {
+  auto c = nongrowing_container();
+  EXPECT_THROW(fmt::format_to(std::back_inserter(c), "{}", 42),
+               std::runtime_error);
+}
+
+TEST(format_test, format_to_n) {
+  char buffer[4];
+  buffer[3] = 'x';
+  auto result = fmt::format_to_n(buffer, 3, "{}", 12345);
+  EXPECT_EQ(5u, result.size);
+  EXPECT_EQ(buffer + 3, result.out);
+  EXPECT_EQ("123x", fmt::string_view(buffer, 4));
+
+  result = fmt::format_to_n(buffer, 3, "{:s}", "foobar");
+  EXPECT_EQ(6u, result.size);
+  EXPECT_EQ(buffer + 3, result.out);
+  EXPECT_EQ("foox", fmt::string_view(buffer, 4));
+
+  buffer[0] = 'x';
+  buffer[1] = 'x';
+  buffer[2] = 'x';
+  result = fmt::format_to_n(buffer, 3, "{}", 'A');
+  EXPECT_EQ(1u, result.size);
+  EXPECT_EQ(buffer + 1, result.out);
+  EXPECT_EQ("Axxx", fmt::string_view(buffer, 4));
+
+  result = fmt::format_to_n(buffer, 3, "{}{} ", 'B', 'C');
+  EXPECT_EQ(3u, result.size);
+  EXPECT_EQ(buffer + 3, result.out);
+  EXPECT_EQ("BC x", fmt::string_view(buffer, 4));
+
+  result = fmt::format_to_n(buffer, 4, "{}", "ABCDE");
+  EXPECT_EQ(5u, result.size);
+  EXPECT_EQ("ABCD", fmt::string_view(buffer, 4));
+
+  buffer[3] = 'x';
+  result = fmt::format_to_n(buffer, 3, "{}", std::string(1000, '*'));
+  EXPECT_EQ(1000u, result.size);
+  EXPECT_EQ("***x", fmt::string_view(buffer, 4));
+}
+
+struct test_output_iterator {
+  char* data;
+
+  using iterator_category = std::output_iterator_tag;
+  using value_type = void;
+  using difference_type = void;
+  using pointer = void;
+  using reference = void;
+
+  test_output_iterator& operator++() {
+    ++data;
+    return *this;
+  }
+  test_output_iterator operator++(int) {
+    auto tmp = *this;
+    ++data;
+    return tmp;
+  }
+  char& operator*() { return *data; }
+};
+
+TEST(format_test, format_to_n_output_iterator) {
+  char buf[10] = {};
+  fmt::format_to_n(test_output_iterator{buf}, 10, "{}", 42);
+  EXPECT_STREQ(buf, "42");
+}
+
+#if FMT_USE_CONSTEXPR
+struct test_error_handler {
+  const char*& error;
+
+  FMT_CONSTEXPR test_error_handler(const char*& err) : error(err) {}
+
+  FMT_CONSTEXPR test_error_handler(const test_error_handler& other)
+      : error(other.error) {}
+
+  FMT_CONSTEXPR void on_error(const char* message) {
+    if (!error) error = message;
+  }
+};
+
+FMT_CONSTEXPR size_t len(const char* s) {
+  size_t len = 0;
+  while (*s++) ++len;
+  return len;
+}
+
+FMT_CONSTEXPR bool equal(const char* s1, const char* s2) {
+  if (!s1 || !s2) return s1 == s2;
+  while (*s1 && *s1 == *s2) {
+    ++s1;
+    ++s2;
+  }
+  return *s1 == *s2;
+}
+
+template <typename... Args>
+FMT_CONSTEXPR bool test_error(const char* fmt, const char* expected_error) {
+  const char* actual_error = nullptr;
+  auto s = string_view(fmt, len(fmt));
+  auto checker =
+      fmt::detail::format_string_checker<char, test_error_handler, Args...>(
+          s, test_error_handler(actual_error));
+  fmt::detail::parse_format_string<true>(s, checker);
+  return equal(actual_error, expected_error);
+}
+
+#  define EXPECT_ERROR_NOARGS(fmt, error) \
+    static_assert(test_error(fmt, error), "")
+#  define EXPECT_ERROR(fmt, error, ...) \
+    static_assert(test_error<__VA_ARGS__>(fmt, error), "")
+
+TEST(format_test, format_string_errors) {
+  EXPECT_ERROR_NOARGS("foo", nullptr);
+  EXPECT_ERROR_NOARGS("}", "unmatched '}' in format string");
+  EXPECT_ERROR("{0:s", "unknown format specifier", date);
+#  if !FMT_MSC_VER || FMT_MSC_VER >= 1916
+  // This causes an detail compiler error in MSVC2017.
+  EXPECT_ERROR("{:{<}", "invalid fill character '{'", int);
+  EXPECT_ERROR("{:10000000000}", "number is too big", int);
+  EXPECT_ERROR("{:.10000000000}", "number is too big", int);
+  EXPECT_ERROR_NOARGS("{:x}", "argument not found");
+  EXPECT_ERROR("{:+}", "format specifier requires numeric argument",
+               const char*);
+  EXPECT_ERROR("{:-}", "format specifier requires numeric argument",
+               const char*);
+  EXPECT_ERROR("{:#}", "format specifier requires numeric argument",
+               const char*);
+  EXPECT_ERROR("{: }", "format specifier requires numeric argument",
+               const char*);
+  EXPECT_ERROR("{:0}", "format specifier requires numeric argument",
+               const char*);
+  EXPECT_ERROR("{:+}", "format specifier requires signed argument", unsigned);
+  EXPECT_ERROR("{:-}", "format specifier requires signed argument", unsigned);
+  EXPECT_ERROR("{: }", "format specifier requires signed argument", unsigned);
+  EXPECT_ERROR("{:{}}", "argument not found", int);
+  EXPECT_ERROR("{:.{}}", "argument not found", double);
+  EXPECT_ERROR("{:.2}", "precision not allowed for this argument type", int);
+  EXPECT_ERROR("{:s}", "invalid type specifier", int);
+  EXPECT_ERROR("{:s}", "invalid type specifier", char);
+  EXPECT_ERROR("{:+}", "invalid format specifier for char", char);
+  EXPECT_ERROR("{:s}", "invalid type specifier", double);
+  EXPECT_ERROR("{:d}", "invalid type specifier", const char*);
+  EXPECT_ERROR("{:d}", "invalid type specifier", std::string);
+  EXPECT_ERROR("{:s}", "invalid type specifier", void*);
+#  else
+  fmt::print("warning: constexpr is broken in this version of MSVC\n");
+#  endif
+#  if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+  EXPECT_ERROR("{foo}", "named argument is not found", decltype("bar"_a = 42));
+  EXPECT_ERROR("{foo}", "named argument is not found",
+               decltype(fmt::arg("foo", 42)));
+#  else
+  EXPECT_ERROR("{foo}",
+               "compile-time checks for named arguments require C++20 support",
+               int);
+#  endif
+  EXPECT_ERROR_NOARGS("{10000000000}", "argument not found");
+  EXPECT_ERROR_NOARGS("{0x}", "invalid format string");
+  EXPECT_ERROR_NOARGS("{-}", "invalid format string");
+  EXPECT_ERROR("{:{0x}}", "invalid format string", int);
+  EXPECT_ERROR("{:{-}}", "invalid format string", int);
+  EXPECT_ERROR("{:.{0x}}", "invalid format string", int);
+  EXPECT_ERROR("{:.{-}}", "invalid format string", int);
+  EXPECT_ERROR("{:.x}", "missing precision specifier", int);
+  EXPECT_ERROR_NOARGS("{}", "argument not found");
+  EXPECT_ERROR("{1}", "argument not found", int);
+  EXPECT_ERROR("{1}{}",
+               "cannot switch from manual to automatic argument indexing", int,
+               int);
+  EXPECT_ERROR("{}{1}",
+               "cannot switch from automatic to manual argument indexing", int,
+               int);
+}
+
+TEST(format_test, vformat_to) {
+  using context = fmt::format_context;
+  fmt::basic_format_arg<context> arg = fmt::detail::make_arg<context>(42);
+  auto args = fmt::basic_format_args<context>(&arg, 1);
+  auto s = std::string();
+  fmt::vformat_to(std::back_inserter(s), "{}", args);
+  EXPECT_EQ("42", s);
+  s.clear();
+  fmt::vformat_to(std::back_inserter(s), FMT_STRING("{}"), args);
+  EXPECT_EQ("42", s);
+}
+
+#endif  // FMT_USE_CONSTEXPR
+
+TEST(format_test, char_traits_is_not_ambiguous) {
+  // Test that we don't inject detail names into the std namespace.
+  using namespace std;
+  auto c = char_traits<char>::char_type();
+  (void)c;
+#if __cplusplus >= 201103L
+  auto s = std::string();
+  auto lval = begin(s);
+  (void)lval;
+#endif
+}
+
+struct check_back_appender {};
+
+FMT_BEGIN_NAMESPACE
+template <> struct formatter<check_back_appender> {
+  auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  template <typename Context>
+  auto format(check_back_appender, Context& ctx) -> decltype(ctx.out()) {
+    auto out = ctx.out();
+    static_assert(std::is_same<decltype(++out), decltype(out)&>::value,
+                  "needs to satisfy weakly_incrementable");
+    *out = 'y';
+    return ++out;
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(format_test, back_insert_slicing) {
+  EXPECT_EQ(fmt::format("{}", check_back_appender{}), "y");
+}
+
+template <typename Char, typename T> bool check_enabled_formatter() {
+  static_assert(std::is_default_constructible<fmt::formatter<T, Char>>::value,
+                "");
+  return true;
+}
+
+template <typename Char, typename... T> void check_enabled_formatters() {
+  auto dummy = {check_enabled_formatter<Char, T>()...};
+  (void)dummy;
+}
+
+TEST(format_test, test_formatters_enabled) {
+  check_enabled_formatters<char, bool, char, signed char, unsigned char, short,
+                           unsigned short, int, unsigned, long, unsigned long,
+                           long long, unsigned long long, float, double,
+                           long double, void*, const void*, char*, const char*,
+                           std::string, std::nullptr_t>();
+  check_enabled_formatters<wchar_t, bool, wchar_t, signed char, unsigned char,
+                           short, unsigned short, int, unsigned, long,
+                           unsigned long, long long, unsigned long long, float,
+                           double, long double, void*, const void*, wchar_t*,
+                           const wchar_t*, std::wstring, std::nullptr_t>();
+}
+
+TEST(format_int_test, data) {
+  fmt::format_int format_int(42);
+  EXPECT_EQ("42", std::string(format_int.data(), format_int.size()));
+}
+
+TEST(format_int_test, format_int) {
+  EXPECT_EQ("42", fmt::format_int(42).str());
+  EXPECT_EQ(2u, fmt::format_int(42).size());
+  EXPECT_EQ("-42", fmt::format_int(-42).str());
+  EXPECT_EQ(3u, fmt::format_int(-42).size());
+  EXPECT_EQ("42", fmt::format_int(42ul).str());
+  EXPECT_EQ("-42", fmt::format_int(-42l).str());
+  EXPECT_EQ("42", fmt::format_int(42ull).str());
+  EXPECT_EQ("-42", fmt::format_int(-42ll).str());
+  std::ostringstream os;
+  os << max_value<int64_t>();
+  EXPECT_EQ(os.str(), fmt::format_int(max_value<int64_t>()).str());
+}
diff --git a/3rdparty/fmt/test/fuzzing/.gitignore b/3rdparty/fmt/test/fuzzing/.gitignore
new file mode 100644
index 00000000..ea410402
--- /dev/null
+++ b/3rdparty/fmt/test/fuzzing/.gitignore
@@ -0,0 +1,3 @@
+# ignore artifacts from the build.sh script
+build-*/
+
diff --git a/3rdparty/fmt/test/fuzzing/CMakeLists.txt b/3rdparty/fmt/test/fuzzing/CMakeLists.txt
new file mode 100644
index 00000000..0280c5cd
--- /dev/null
+++ b/3rdparty/fmt/test/fuzzing/CMakeLists.txt
@@ -0,0 +1,30 @@
+# Copyright (c) 2019, Paul Dreik
+# License: see LICENSE.rst in the fmt root directory
+
+# Link in the main function. Useful for reproducing, kcov, gdb, afl, valgrind.
+# (Note that libFuzzer can also reproduce, just pass it the files.)
+option(FMT_FUZZ_LINKMAIN "Enables the reproduce mode, instead of libFuzzer" On)
+
+# For oss-fuzz - insert $LIB_FUZZING_ENGINE into the link flags, but only for
+# the fuzz targets, otherwise the CMake configuration step fails.
+set(FMT_FUZZ_LDFLAGS "" CACHE STRING "LDFLAGS for the fuzz targets")
+
+# Adds a binary for reproducing, i.e. no fuzzing, just enables replaying data
+# through the fuzzers.
+function(add_fuzzer source)
+  get_filename_component(basename ${source} NAME_WE)
+  set(name ${basename}-fuzzer)
+  add_executable(${name} ${source} fuzzer-common.h)
+  if (FMT_FUZZ_LINKMAIN)
+    target_sources(${name} PRIVATE main.cc)
+  endif ()
+  target_link_libraries(${name} PRIVATE fmt)
+  if (FMT_FUZZ_LDFLAGS)
+    target_link_libraries(${name} PRIVATE ${FMT_FUZZ_LDFLAGS})
+  endif ()
+  target_compile_features(${name} PRIVATE cxx_generic_lambdas)
+endfunction()
+
+foreach (source chrono-duration.cc chrono-timepoint.cc float.cc named-arg.cc one-arg.cc two-args.cc)
+  add_fuzzer(${source})
+endforeach ()
diff --git a/3rdparty/fmt/test/fuzzing/README.md b/3rdparty/fmt/test/fuzzing/README.md
new file mode 100644
index 00000000..bb3d0e04
--- /dev/null
+++ b/3rdparty/fmt/test/fuzzing/README.md
@@ -0,0 +1,25 @@
+# Running the fuzzers locally
+
+There is a [helper script](build.sh) to build the fuzzers, which has only been
+tested on Debian and Ubuntu linux so far. There should be no problems fuzzing on
+Windows (using clang>=8) or on Mac, but the script will probably not work out of
+the box.
+
+Something along
+```sh
+mkdir build
+cd build
+export CXX=clang++
+export CXXFLAGS="-fsanitize=fuzzer-no-link -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION= -g"
+cmake .. -DFMT_SAFE_DURATION_CAST=On -DFMT_FUZZ=On -DFMT_FUZZ_LINKMAIN=Off -DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer"
+cmake --build .
+```
+should work to build the fuzzers for all platforms which clang supports.
+
+Execute a fuzzer with for instance
+```sh
+cd build
+export UBSAN_OPTIONS=halt_on_error=1
+mkdir out_chrono
+bin/fuzzer_chrono_duration out_chrono
+```
diff --git a/3rdparty/fmt/test/fuzzing/build.sh b/3rdparty/fmt/test/fuzzing/build.sh
new file mode 100644
index 00000000..4497b62c
--- /dev/null
+++ b/3rdparty/fmt/test/fuzzing/build.sh
@@ -0,0 +1,90 @@
+#!/bin/sh
+#
+# Creates fuzzer builds of various kinds
+# - oss-fuzz emulated mode (makes sure a simulated invocation by oss-fuzz works)
+# - libFuzzer build (you will need clang)
+# - afl build (you will need afl)
+#
+#
+# Copyright (c) 2019 Paul Dreik
+#
+# For the license information refer to format.h.
+
+set -e
+me=$(basename $0)
+root=$(readlink -f "$(dirname "$0")/../..")
+
+
+echo $me: root=$root
+
+here=$(pwd)
+
+CXXFLAGSALL="-DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION= -g"
+CMAKEFLAGSALL="$root -GNinja -DCMAKE_BUILD_TYPE=Debug -DFMT_DOC=Off -DFMT_TEST=Off -DFMT_FUZZ=On -DCMAKE_CXX_STANDARD=17"
+
+CLANG=clang++-11
+
+# For performance analysis of the fuzzers.
+builddir=$here/build-fuzzers-perfanalysis
+mkdir -p $builddir
+cd $builddir
+CXX="ccache g++" CXXFLAGS="$CXXFLAGSALL -g" cmake \
+$CMAKEFLAGSALL \
+-DFMT_FUZZ_LINKMAIN=On \
+-DCMAKE_BUILD_TYPE=Release
+
+cmake --build $builddir
+
+# Builds the fuzzers as oss-fuzz does.
+builddir=$here/build-fuzzers-ossfuzz
+mkdir -p $builddir
+cd $builddir
+CXX=$CLANG \
+CXXFLAGS="$CXXFLAGSALL -fsanitize=fuzzer-no-link" cmake \
+cmake $CMAKEFLAGSALL \
+-DFMT_FUZZ_LINKMAIN=Off \
+-DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer"
+
+cmake --build $builddir
+
+
+# Builds fuzzers for local fuzzing with libfuzzer with asan+usan.
+builddir=$here/build-fuzzers-libfuzzer
+mkdir -p $builddir
+cd $builddir
+CXX=$CLANG \
+CXXFLAGS="$CXXFLAGSALL -fsanitize=fuzzer-no-link,address,undefined" cmake \
+cmake $CMAKEFLAGSALL \
+-DFMT_FUZZ_LINKMAIN=Off \
+-DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer"
+
+cmake --build $builddir
+
+# Builds a fast fuzzer for making coverage fast.
+builddir=$here/build-fuzzers-fast
+mkdir -p $builddir
+cd $builddir
+CXX=$CLANG \
+CXXFLAGS="$CXXFLAGSALL -fsanitize=fuzzer-no-link -O3" cmake \
+cmake $CMAKEFLAGSALL \
+-DFMT_FUZZ_LINKMAIN=Off \
+-DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer" \
+ -DCMAKE_BUILD_TYPE=Release
+
+cmake --build $builddir
+
+
+# Builds fuzzers for local fuzzing with afl.
+builddir=$here/build-fuzzers-afl
+mkdir -p $builddir
+cd $builddir
+CXX="afl-g++" \
+CXXFLAGS="$CXXFLAGSALL -fsanitize=address,undefined" \
+cmake $CMAKEFLAGSALL \
+-DFMT_FUZZ_LINKMAIN=On
+
+cmake --build $builddir
+
+
+echo $me: all good
+
diff --git a/3rdparty/fmt/test/fuzzing/chrono-duration.cc b/3rdparty/fmt/test/fuzzing/chrono-duration.cc
new file mode 100644
index 00000000..d66068d9
--- /dev/null
+++ b/3rdparty/fmt/test/fuzzing/chrono-duration.cc
@@ -0,0 +1,136 @@
+// Copyright (c) 2019, Paul Dreik
+// For the license information refer to format.h.
+
+#include <fmt/chrono.h>
+
+#include <cstdint>
+
+#include "fuzzer-common.h"
+
+template <typename Period, typename Rep>
+void invoke_inner(fmt::string_view format_str, Rep rep) {
+  auto value = std::chrono::duration<Rep, Period>(rep);
+  try {
+#if FMT_FUZZ_FORMAT_TO_STRING
+    std::string message = fmt::format(format_str, value);
+#else
+    auto buf = fmt::memory_buffer();
+    fmt::format_to(std::back_inserter(buf), format_str, value);
+#endif
+  } catch (std::exception&) {
+  }
+}
+
+// Rep is a duration's representation type.
+template <typename Rep>
+void invoke_outer(const uint8_t* data, size_t size, int period) {
+  // Always use a fixed location of the data.
+  static_assert(sizeof(Rep) <= fixed_size, "fixed size is too small");
+  if (size <= fixed_size + 1) return;
+
+  const Rep rep = assign_from_buf<Rep>(data);
+  data += fixed_size;
+  size -= fixed_size;
+
+  // data is already allocated separately in libFuzzer so reading past the end
+  // will most likely be detected anyway.
+  const auto format_str = fmt::string_view(as_chars(data), size);
+
+  // yocto, zepto, zetta and yotta are not handled.
+  switch (period) {
+  case 1:
+    invoke_inner<std::atto>(format_str, rep);
+    break;
+  case 2:
+    invoke_inner<std::femto>(format_str, rep);
+    break;
+  case 3:
+    invoke_inner<std::pico>(format_str, rep);
+    break;
+  case 4:
+    invoke_inner<std::nano>(format_str, rep);
+    break;
+  case 5:
+    invoke_inner<std::micro>(format_str, rep);
+    break;
+  case 6:
+    invoke_inner<std::milli>(format_str, rep);
+    break;
+  case 7:
+    invoke_inner<std::centi>(format_str, rep);
+    break;
+  case 8:
+    invoke_inner<std::deci>(format_str, rep);
+    break;
+  case 9:
+    invoke_inner<std::deca>(format_str, rep);
+    break;
+  case 10:
+    invoke_inner<std::kilo>(format_str, rep);
+    break;
+  case 11:
+    invoke_inner<std::mega>(format_str, rep);
+    break;
+  case 12:
+    invoke_inner<std::giga>(format_str, rep);
+    break;
+  case 13:
+    invoke_inner<std::tera>(format_str, rep);
+    break;
+  case 14:
+    invoke_inner<std::peta>(format_str, rep);
+    break;
+  case 15:
+    invoke_inner<std::exa>(format_str, rep);
+    break;
+  }
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  if (size <= 4) return 0;
+
+  const auto representation = data[0];
+  const auto period = data[1];
+  data += 2;
+  size -= 2;
+
+  switch (representation) {
+  case 1:
+    invoke_outer<char>(data, size, period);
+    break;
+  case 2:
+    invoke_outer<signed char>(data, size, period);
+    break;
+  case 3:
+    invoke_outer<unsigned char>(data, size, period);
+    break;
+  case 4:
+    invoke_outer<short>(data, size, period);
+    break;
+  case 5:
+    invoke_outer<unsigned short>(data, size, period);
+    break;
+  case 6:
+    invoke_outer<int>(data, size, period);
+    break;
+  case 7:
+    invoke_outer<unsigned int>(data, size, period);
+    break;
+  case 8:
+    invoke_outer<long>(data, size, period);
+    break;
+  case 9:
+    invoke_outer<unsigned long>(data, size, period);
+    break;
+  case 10:
+    invoke_outer<float>(data, size, period);
+    break;
+  case 11:
+    invoke_outer<double>(data, size, period);
+    break;
+  case 12:
+    invoke_outer<long double>(data, size, period);
+    break;
+  }
+  return 0;
+}
diff --git a/3rdparty/fmt/test/fuzzing/chrono-timepoint.cc b/3rdparty/fmt/test/fuzzing/chrono-timepoint.cc
new file mode 100644
index 00000000..8a1b24d2
--- /dev/null
+++ b/3rdparty/fmt/test/fuzzing/chrono-timepoint.cc
@@ -0,0 +1,32 @@
+// Copyright (c) 2021, Paul Dreik
+// For license information refer to format.h.
+#include <fmt/chrono.h>
+
+#include "fuzzer-common.h"
+
+/*
+ * a fuzzer for the chrono timepoints formatters
+ * C is a clock (std::chrono::system_clock etc)
+ */
+template <typename C> void doit(const uint8_t* data, size_t size) {
+  using Rep = typename C::time_point::rep;
+  constexpr auto N = sizeof(Rep);
+  if (size < N) return;
+
+  const auto x = assign_from_buf<Rep>(data);
+  typename C::duration dur{x};
+  typename C::time_point timepoint{dur};
+  data += N;
+  size -= N;
+  data_to_string format_str(data, size);
+
+  std::string message = fmt::format(format_str.get(), timepoint);
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  try {
+    doit<std::chrono::system_clock>(data, size);
+  } catch (...) {
+  }
+  return 0;
+}
diff --git a/3rdparty/fmt/test/fuzzing/float.cc b/3rdparty/fmt/test/fuzzing/float.cc
new file mode 100644
index 00000000..d4c9e4f5
--- /dev/null
+++ b/3rdparty/fmt/test/fuzzing/float.cc
@@ -0,0 +1,39 @@
+// A fuzzer for floating-point formatter.
+// For the license information refer to format.h.
+
+#include <fmt/format.h>
+
+#include <cstdint>
+#include <cstdlib>
+#include <limits>
+#include <stdexcept>
+
+#include "fuzzer-common.h"
+
+void check_round_trip(fmt::string_view format_str, double value) {
+  auto buffer = fmt::memory_buffer();
+  fmt::format_to(std::back_inserter(buffer), format_str, value);
+
+  if (std::isnan(value)) {
+    auto nan = std::signbit(value) ? "-nan" : "nan";
+    if (fmt::string_view(buffer.data(), buffer.size()) != nan)
+      throw std::runtime_error("round trip failure");
+    return;
+  }
+
+  buffer.push_back('\0');
+  char* ptr = nullptr;
+  if (std::strtod(buffer.data(), &ptr) != value)
+    throw std::runtime_error("round trip failure");
+  if (ptr + 1 != buffer.end()) throw std::runtime_error("unparsed output");
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  if (size <= sizeof(double) || !std::numeric_limits<double>::is_iec559)
+    return 0;
+  check_round_trip("{}", assign_from_buf<double>(data));
+  // A larger than necessary precision is used to trigger the fallback
+  // formatter.
+  check_round_trip("{:.50g}", assign_from_buf<double>(data));
+  return 0;
+}
diff --git a/3rdparty/fmt/test/fuzzing/fuzzer-common.h b/3rdparty/fmt/test/fuzzing/fuzzer-common.h
new file mode 100644
index 00000000..c0a24672
--- /dev/null
+++ b/3rdparty/fmt/test/fuzzing/fuzzer-common.h
@@ -0,0 +1,77 @@
+// Copyright (c) 2019, Paul Dreik
+// For the license information refer to format.h.
+
+#ifndef FUZZER_COMMON_H
+#define FUZZER_COMMON_H
+
+#include <fmt/core.h>
+
+#include <cstdint>  // std::uint8_t
+#include <cstring>  // memcpy
+#include <vector>
+
+// One can format to either a string, or a buffer. The latter is faster, but
+// one may be interested in formatting to a string instead to verify it works
+// as intended. To avoid a combinatoric explosion, select this at compile time
+// instead of dynamically from the fuzz data.
+#define FMT_FUZZ_FORMAT_TO_STRING 0
+
+// If {fmt} is given a buffer that is separately allocated, chances that address
+// sanitizer detects out of bound reads is much higher. However, it slows down
+// the fuzzing.
+#define FMT_FUZZ_SEPARATE_ALLOCATION 1
+
+// The size of the largest possible type in use.
+// To let the the fuzzer mutation be efficient at cross pollinating between
+// different types, use a fixed size format. The same bit pattern, interpreted
+// as another type, is likely interesting.
+constexpr auto fixed_size = 16;
+
+// Casts data to a char pointer.
+template <typename T> inline const char* as_chars(const T* data) {
+  return reinterpret_cast<const char*>(data);
+}
+
+// Casts data to a byte pointer.
+template <typename T> inline const std::uint8_t* as_bytes(const T* data) {
+  return reinterpret_cast<const std::uint8_t*>(data);
+}
+
+// Blits bytes from data to form an (assumed trivially constructible) object
+// of type Item.
+template <class Item> inline Item assign_from_buf(const std::uint8_t* data) {
+  auto item = Item();
+  std::memcpy(&item, data, sizeof(Item));
+  return item;
+}
+
+// Reads a boolean value by looking at the first byte from data.
+template <> inline bool assign_from_buf<bool>(const std::uint8_t* data) {
+  return *data != 0;
+}
+
+struct data_to_string {
+#if FMT_FUZZ_SEPARATE_ALLOCATION
+  std::vector<char> buffer;
+
+  data_to_string(const uint8_t* data, size_t size, bool add_terminator = false)
+      : buffer(size + (add_terminator ? 1 : 0)) {
+    if (size) {
+      std::memcpy(buffer.data(), data, size);
+    }
+  }
+
+  fmt::string_view get() const { return {buffer.data(), buffer.size()}; }
+#else
+  fmt::string_view sv;
+
+  data_to_string(const uint8_t* data, size_t size, bool = false)
+      : str(as_chars(data), size) {}
+
+  fmt::string_view get() const { return sv; }
+#endif
+
+  const char* data() const { return get().data(); }
+};
+
+#endif  // FUZZER_COMMON_H
diff --git a/3rdparty/fmt/test/fuzzing/main.cc b/3rdparty/fmt/test/fuzzing/main.cc
new file mode 100644
index 00000000..8f8c719b
--- /dev/null
+++ b/3rdparty/fmt/test/fuzzing/main.cc
@@ -0,0 +1,22 @@
+#include <cassert>
+#include <fstream>
+#include <vector>
+
+#include "fuzzer-common.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
+
+int main(int argc, char** argv) {
+  for (int i = 1; i < argc; ++i) {
+    std::ifstream in(argv[i]);
+    assert(in);
+    in.seekg(0, std::ios_base::end);
+    const auto size = in.tellg();
+    assert(size >= 0);
+    in.seekg(0, std::ios_base::beg);
+    std::vector<char> buf(static_cast<size_t>(size));
+    in.read(buf.data(), size);
+    assert(in.gcount() == size);
+    LLVMFuzzerTestOneInput(as_bytes(buf.data()), buf.size());
+  }
+}
diff --git a/3rdparty/fmt/test/fuzzing/named-arg.cc b/3rdparty/fmt/test/fuzzing/named-arg.cc
new file mode 100644
index 00000000..3bee1ae3
--- /dev/null
+++ b/3rdparty/fmt/test/fuzzing/named-arg.cc
@@ -0,0 +1,102 @@
+// Copyright (c) 2019, Paul Dreik
+// For the license information refer to format.h.
+
+#include <fmt/chrono.h>
+
+#include <cstdint>
+#include <type_traits>
+#include <vector>
+
+#include "fuzzer-common.h"
+
+template <typename T>
+void invoke_fmt(const uint8_t* data, size_t size, unsigned arg_name_size) {
+  static_assert(sizeof(T) <= fixed_size, "fixed_size too small");
+  if (size <= fixed_size) return;
+  const T value = assign_from_buf<T>(data);
+  data += fixed_size;
+  size -= fixed_size;
+
+  if (arg_name_size <= 0 || arg_name_size >= size) return;
+  data_to_string arg_name(data, arg_name_size, true);
+  data += arg_name_size;
+  size -= arg_name_size;
+
+  data_to_string format_str(data, size);
+  try {
+#if FMT_FUZZ_FORMAT_TO_STRING
+    std::string message =
+        fmt::format(format_str.get(), fmt::arg(arg_name.data(), value));
+#else
+    fmt::memory_buffer out;
+    fmt::format_to(std::back_inserter(out), format_str.get(),
+                   fmt::arg(arg_name.data(), value));
+#endif
+  } catch (std::exception&) {
+  }
+}
+
+// For dynamic dispatching to an explicit instantiation.
+template <typename Callback> void invoke(int type, Callback callback) {
+  switch (type) {
+  case 0:
+    callback(bool());
+    break;
+  case 1:
+    callback(char());
+    break;
+  case 2:
+    using sc = signed char;
+    callback(sc());
+    break;
+  case 3:
+    using uc = unsigned char;
+    callback(uc());
+    break;
+  case 4:
+    callback(short());
+    break;
+  case 5:
+    using us = unsigned short;
+    callback(us());
+    break;
+  case 6:
+    callback(int());
+    break;
+  case 7:
+    callback(unsigned());
+    break;
+  case 8:
+    callback(long());
+    break;
+  case 9:
+    using ul = unsigned long;
+    callback(ul());
+    break;
+  case 10:
+    callback(float());
+    break;
+  case 11:
+    callback(double());
+    break;
+  case 12:
+    using LD = long double;
+    callback(LD());
+    break;
+  }
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  if (size <= 3) return 0;
+
+  // Switch types depending on the first byte of the input.
+  const auto type = data[0] & 0x0F;
+  const unsigned arg_name_size = (data[0] & 0xF0) >> 4;
+  data++;
+  size--;
+
+  invoke(type, [=](auto arg) {
+    invoke_fmt<decltype(arg)>(data, size, arg_name_size);
+  });
+  return 0;
+}
diff --git a/3rdparty/fmt/test/fuzzing/one-arg.cc b/3rdparty/fmt/test/fuzzing/one-arg.cc
new file mode 100644
index 00000000..90cec716
--- /dev/null
+++ b/3rdparty/fmt/test/fuzzing/one-arg.cc
@@ -0,0 +1,92 @@
+// Copyright (c) 2019, Paul Dreik
+// For the license information refer to format.h.
+
+#include <fmt/chrono.h>
+
+#include <cstdint>
+#include <exception>
+
+#include "fuzzer-common.h"
+
+template <typename T, typename Repr> const T* from_repr(const Repr& r) {
+  return &r;
+}
+
+template <> const std::tm* from_repr<std::tm>(const std::time_t& t) {
+  return std::localtime(&t);
+}
+
+template <typename T, typename Repr = T>
+void invoke_fmt(const uint8_t* data, size_t size) {
+  static_assert(sizeof(Repr) <= fixed_size, "Nfixed is too small");
+  if (size <= fixed_size) return;
+  auto repr = assign_from_buf<Repr>(data);
+  const T* value = from_repr<T>(repr);
+  if (!value) return;
+  data += fixed_size;
+  size -= fixed_size;
+  data_to_string format_str(data, size);
+  try {
+#if FMT_FUZZ_FORMAT_TO_STRING
+    std::string message = fmt::format(format_str.get(), *value);
+#else
+    fmt::memory_buffer message;
+    fmt::format_to(message, format_str.get(), *value);
+#endif
+  } catch (std::exception&) {
+  }
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  if (size <= 3) return 0;
+
+  const auto first = data[0];
+  data++;
+  size--;
+
+  switch (first) {
+  case 0:
+    invoke_fmt<bool>(data, size);
+    break;
+  case 1:
+    invoke_fmt<char>(data, size);
+    break;
+  case 2:
+    invoke_fmt<unsigned char>(data, size);
+    break;
+  case 3:
+    invoke_fmt<signed char>(data, size);
+    break;
+  case 4:
+    invoke_fmt<short>(data, size);
+    break;
+  case 5:
+    invoke_fmt<unsigned short>(data, size);
+    break;
+  case 6:
+    invoke_fmt<int>(data, size);
+    break;
+  case 7:
+    invoke_fmt<unsigned int>(data, size);
+    break;
+  case 8:
+    invoke_fmt<long>(data, size);
+    break;
+  case 9:
+    invoke_fmt<unsigned long>(data, size);
+    break;
+  case 10:
+    invoke_fmt<float>(data, size);
+    break;
+  case 11:
+    invoke_fmt<double>(data, size);
+    break;
+  case 12:
+    invoke_fmt<long double>(data, size);
+    break;
+  case 13:
+    invoke_fmt<std::tm, std::time_t>(data, size);
+    break;
+  }
+  return 0;
+}
diff --git a/3rdparty/fmt/test/fuzzing/two-args.cc b/3rdparty/fmt/test/fuzzing/two-args.cc
new file mode 100644
index 00000000..979320c2
--- /dev/null
+++ b/3rdparty/fmt/test/fuzzing/two-args.cc
@@ -0,0 +1,106 @@
+// Copyright (c) 2019, Paul Dreik
+// For the license information refer to format.h.
+
+#include <fmt/format.h>
+
+#include <cstdint>
+#include <exception>
+#include <string>
+
+#include "fuzzer-common.h"
+
+template <typename Item1, typename Item2>
+void invoke_fmt(const uint8_t* data, size_t size) {
+  static_assert(sizeof(Item1) <= fixed_size, "size1 exceeded");
+  static_assert(sizeof(Item2) <= fixed_size, "size2 exceeded");
+  if (size <= fixed_size + fixed_size) return;
+
+  const Item1 item1 = assign_from_buf<Item1>(data);
+  data += fixed_size;
+  size -= fixed_size;
+
+  const Item2 item2 = assign_from_buf<Item2>(data);
+  data += fixed_size;
+  size -= fixed_size;
+
+  auto format_str = fmt::string_view(as_chars(data), size);
+#if FMT_FUZZ_FORMAT_TO_STRING
+  std::string message = fmt::format(format_str, item1, item2);
+#else
+  fmt::memory_buffer message;
+  fmt::format_to(message, format_str, item1, item2);
+#endif
+}
+
+// For dynamic dispatching to an explicit instantiation.
+template <typename Callback> void invoke(int index, Callback callback) {
+  switch (index) {
+  case 0:
+    callback(bool());
+    break;
+  case 1:
+    callback(char());
+    break;
+  case 2:
+    using sc = signed char;
+    callback(sc());
+    break;
+  case 3:
+    using uc = unsigned char;
+    callback(uc());
+    break;
+  case 4:
+    callback(short());
+    break;
+  case 5:
+    using us = unsigned short;
+    callback(us());
+    break;
+  case 6:
+    callback(int());
+    break;
+  case 7:
+    callback(unsigned());
+    break;
+  case 8:
+    callback(long());
+    break;
+  case 9:
+    using ul = unsigned long;
+    callback(ul());
+    break;
+  case 10:
+    callback(float());
+    break;
+  case 11:
+    callback(double());
+    break;
+  case 12:
+    using LD = long double;
+    callback(LD());
+    break;
+  case 13:
+    using ptr = void*;
+    callback(ptr());
+    break;
+  }
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  if (size <= 3) return 0;
+
+  // Switch types depending on the first byte of the input.
+  const auto type1 = data[0] & 0x0F;
+  const auto type2 = (data[0] & 0xF0) >> 4;
+  data++;
+  size--;
+  try {
+    invoke(type1, [=](auto param1) {
+      invoke(type2, [=](auto param2) {
+        invoke_fmt<decltype(param1), decltype(param2)>(data, size);
+      });
+    });
+  } catch (std::exception&) {
+  }
+  return 0;
+}
diff --git a/3rdparty/fmt/test/gtest-extra-test.cc b/3rdparty/fmt/test/gtest-extra-test.cc
new file mode 100644
index 00000000..0d86206c
--- /dev/null
+++ b/3rdparty/fmt/test/gtest-extra-test.cc
@@ -0,0 +1,413 @@
+// Formatting library for C++ - tests of custom Google Test assertions
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "gtest-extra.h"
+
+#include <gtest/gtest-spi.h>
+
+#include <cstring>
+#include <memory>
+#include <stdexcept>
+
+#include "fmt/os.h"
+#include "util.h"
+
+// Tests that assertion macros evaluate their arguments exactly once.
+namespace {
+class single_evaluation_test : public ::testing::Test {
+ protected:
+  single_evaluation_test() {
+    p_ = s_;
+    a_ = 0;
+    b_ = 0;
+  }
+
+  static const char* const s_;
+  static const char* p_;
+
+  static int a_;
+  static int b_;
+};
+}  // namespace
+
+const char* const single_evaluation_test::s_ = "01234";
+const char* single_evaluation_test::p_;
+int single_evaluation_test::a_;
+int single_evaluation_test::b_;
+
+void do_nothing() {}
+
+FMT_NORETURN void throw_exception() { throw std::runtime_error("test"); }
+
+FMT_NORETURN void throw_system_error() {
+  throw fmt::system_error(EDOM, "test");
+}
+
+// Tests that when EXPECT_THROW_MSG fails, it evaluates its message argument
+// exactly once.
+TEST_F(single_evaluation_test, failed_expect_throw_msg) {
+  EXPECT_NONFATAL_FAILURE(
+      EXPECT_THROW_MSG(throw_exception(), std::exception, p_++), "01234");
+  EXPECT_EQ(s_ + 1, p_);
+}
+
+// Tests that when EXPECT_SYSTEM_ERROR fails, it evaluates its message argument
+// exactly once.
+TEST_F(single_evaluation_test, failed_expect_system_error) {
+  EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, p_++),
+                          "01234");
+  EXPECT_EQ(s_ + 1, p_);
+}
+
+// Tests that assertion arguments are evaluated exactly once.
+TEST_F(single_evaluation_test, exception_tests) {
+  // successful EXPECT_THROW_MSG
+  EXPECT_THROW_MSG(
+      {  // NOLINT
+        a_++;
+        throw_exception();
+      },
+      std::exception, (b_++, "test"));
+  EXPECT_EQ(1, a_);
+  EXPECT_EQ(1, b_);
+
+  // failed EXPECT_THROW_MSG, throws different type
+  EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(
+                              {  // NOLINT
+                                a_++;
+                                throw_exception();
+                              },
+                              std::logic_error, (b_++, "test")),
+                          "throws a different type");
+  EXPECT_EQ(2, a_);
+  EXPECT_EQ(2, b_);
+
+  // failed EXPECT_THROW_MSG, throws an exception with different message
+  EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(
+                              {  // NOLINT
+                                a_++;
+                                throw_exception();
+                              },
+                              std::exception, (b_++, "other")),
+                          "throws an exception with a different message");
+  EXPECT_EQ(3, a_);
+  EXPECT_EQ(3, b_);
+
+  // failed EXPECT_THROW_MSG, throws nothing
+  EXPECT_NONFATAL_FAILURE(
+      EXPECT_THROW_MSG(a_++, std::exception, (b_++, "test")), "throws nothing");
+  EXPECT_EQ(4, a_);
+  EXPECT_EQ(4, b_);
+}
+
+TEST_F(single_evaluation_test, system_error_tests) {
+  // successful EXPECT_SYSTEM_ERROR
+  EXPECT_SYSTEM_ERROR(
+      {  // NOLINT
+        a_++;
+        throw_system_error();
+      },
+      EDOM, (b_++, "test"));
+  EXPECT_EQ(1, a_);
+  EXPECT_EQ(1, b_);
+
+  // failed EXPECT_SYSTEM_ERROR, throws different type
+  EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(
+                              {  // NOLINT
+                                a_++;
+                                throw_exception();
+                              },
+                              EDOM, (b_++, "test")),
+                          "throws a different type");
+  EXPECT_EQ(2, a_);
+  EXPECT_EQ(2, b_);
+
+  // failed EXPECT_SYSTEM_ERROR, throws an exception with different message
+  EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(
+                              {  // NOLINT
+                                a_++;
+                                throw_system_error();
+                              },
+                              EDOM, (b_++, "other")),
+                          "throws an exception with a different message");
+  EXPECT_EQ(3, a_);
+  EXPECT_EQ(3, b_);
+
+  // failed EXPECT_SYSTEM_ERROR, throws nothing
+  EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(a_++, EDOM, (b_++, "test")),
+                          "throws nothing");
+  EXPECT_EQ(4, a_);
+  EXPECT_EQ(4, b_);
+}
+
+#if FMT_USE_FCNTL
+// Tests that when EXPECT_WRITE fails, it evaluates its message argument
+// exactly once.
+TEST_F(single_evaluation_test, failed_expect_write) {
+  EXPECT_NONFATAL_FAILURE(EXPECT_WRITE(stdout, std::printf("test"), p_++),
+                          "01234");
+  EXPECT_EQ(s_ + 1, p_);
+}
+
+// Tests that assertion arguments are evaluated exactly once.
+TEST_F(single_evaluation_test, write_tests) {
+  // successful EXPECT_WRITE
+  EXPECT_WRITE(
+      stdout,
+      {  // NOLINT
+        a_++;
+        std::printf("test");
+      },
+      (b_++, "test"));
+  EXPECT_EQ(1, a_);
+  EXPECT_EQ(1, b_);
+
+  // failed EXPECT_WRITE
+  EXPECT_NONFATAL_FAILURE(EXPECT_WRITE(
+                              stdout,
+                              {  // NOLINT
+                                a_++;
+                                std::printf("test");
+                              },
+                              (b_++, "other")),
+                          "Actual: test");
+  EXPECT_EQ(2, a_);
+  EXPECT_EQ(2, b_);
+}
+
+// Tests EXPECT_WRITE.
+TEST(gtest_extra_test, expect_write) {
+  EXPECT_WRITE(stdout, do_nothing(), "");
+  EXPECT_WRITE(stdout, std::printf("test"), "test");
+  EXPECT_WRITE(stderr, std::fprintf(stderr, "test"), "test");
+  EXPECT_NONFATAL_FAILURE(EXPECT_WRITE(stdout, std::printf("that"), "this"),
+                          "Expected: this\n"
+                          "  Actual: that");
+}
+
+TEST(gtest_extra_test, expect_write_streaming) {
+  EXPECT_WRITE(stdout, std::printf("test"), "test") << "unexpected failure";
+  EXPECT_NONFATAL_FAILURE(EXPECT_WRITE(stdout, std::printf("test"), "other")
+                              << "expected failure",
+                          "expected failure");
+}
+#endif  // FMT_USE_FCNTL
+
+// Tests that the compiler will not complain about unreachable code in the
+// EXPECT_THROW_MSG macro.
+TEST(gtest_extra_test, expect_throw_no_unreachable_code_warning) {
+  int n = 0;
+  using std::runtime_error;
+  EXPECT_THROW_MSG(throw runtime_error(""), runtime_error, "");
+  EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(n++, runtime_error, ""), "");
+  EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(throw 1, runtime_error, ""), "");
+  EXPECT_NONFATAL_FAILURE(
+      EXPECT_THROW_MSG(throw runtime_error("a"), runtime_error, "b"), "");
+}
+
+// Tests that the compiler will not complain about unreachable code in the
+// EXPECT_SYSTEM_ERROR macro.
+TEST(gtest_extra_test, expect_system_error_no_unreachable_code_warning) {
+  int n = 0;
+  EXPECT_SYSTEM_ERROR(throw fmt::system_error(EDOM, "test"), EDOM, "test");
+  EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(n++, EDOM, ""), "");
+  EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(throw 1, EDOM, ""), "");
+  EXPECT_NONFATAL_FAILURE(
+      EXPECT_SYSTEM_ERROR(throw fmt::system_error(EDOM, "aaa"), EDOM, "bbb"),
+      "");
+}
+
+TEST(gtest_extra_test, expect_throw_behaves_like_single_statement) {
+  if (::testing::internal::AlwaysFalse())
+    EXPECT_THROW_MSG(do_nothing(), std::exception, "");
+
+  if (::testing::internal::AlwaysTrue())
+    EXPECT_THROW_MSG(throw_exception(), std::exception, "test");
+  else
+    do_nothing();
+}
+
+TEST(gtest_extra_test, expect_system_error_behaves_like_single_statement) {
+  if (::testing::internal::AlwaysFalse())
+    EXPECT_SYSTEM_ERROR(do_nothing(), EDOM, "");
+
+  if (::testing::internal::AlwaysTrue())
+    EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "test");
+  else
+    do_nothing();
+}
+
+TEST(gtest_extra_test, expect_write_behaves_like_single_statement) {
+  if (::testing::internal::AlwaysFalse())
+    EXPECT_WRITE(stdout, std::printf("x"), "x");
+
+  if (::testing::internal::AlwaysTrue())
+    EXPECT_WRITE(stdout, std::printf("x"), "x");
+  else
+    do_nothing();
+}
+
+// Tests EXPECT_THROW_MSG.
+TEST(gtest_extra_test, expect_throw_msg) {
+  EXPECT_THROW_MSG(throw_exception(), std::exception, "test");
+  EXPECT_NONFATAL_FAILURE(
+      EXPECT_THROW_MSG(throw_exception(), std::logic_error, "test"),
+      "Expected: throw_exception() throws an exception of "
+      "type std::logic_error.\n  Actual: it throws a different type.");
+  EXPECT_NONFATAL_FAILURE(
+      EXPECT_THROW_MSG(do_nothing(), std::exception, "test"),
+      "Expected: do_nothing() throws an exception of type std::exception.\n"
+      "  Actual: it throws nothing.");
+  EXPECT_NONFATAL_FAILURE(
+      EXPECT_THROW_MSG(throw_exception(), std::exception, "other"),
+      "throw_exception() throws an exception with a different message.\n"
+      "Expected: other\n"
+      "  Actual: test");
+}
+
+// Tests EXPECT_SYSTEM_ERROR.
+TEST(gtest_extra_test, expect_system_error) {
+  EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "test");
+  EXPECT_NONFATAL_FAILURE(
+      EXPECT_SYSTEM_ERROR(throw_exception(), EDOM, "test"),
+      "Expected: throw_exception() throws an exception of "
+      "type std::system_error.\n  Actual: it throws a different type.");
+  EXPECT_NONFATAL_FAILURE(
+      EXPECT_SYSTEM_ERROR(do_nothing(), EDOM, "test"),
+      "Expected: do_nothing() throws an exception of type std::system_error.\n"
+      "  Actual: it throws nothing.");
+  EXPECT_NONFATAL_FAILURE(
+      EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "other"),
+      fmt::format(
+          "throw_system_error() throws an exception with a different message.\n"
+          "Expected: {}\n"
+          "  Actual: {}",
+          system_error_message(EDOM, "other"),
+          system_error_message(EDOM, "test")));
+}
+
+TEST(gtest_extra_test, expect_throw_msg_streaming) {
+  EXPECT_THROW_MSG(throw_exception(), std::exception, "test")
+      << "unexpected failure";
+  EXPECT_NONFATAL_FAILURE(
+      EXPECT_THROW_MSG(throw_exception(), std::exception, "other")
+          << "expected failure",
+      "expected failure");
+}
+
+TEST(gtest_extra_test, expect_system_error_streaming) {
+  EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "test")
+      << "unexpected failure";
+  EXPECT_NONFATAL_FAILURE(
+      EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "other")
+          << "expected failure",
+      "expected failure");
+}
+
+#if FMT_USE_FCNTL
+
+using fmt::buffered_file;
+using fmt::file;
+
+TEST(output_redirect_test, scoped_redirect) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  {
+    buffered_file file(write_end.fdopen("w"));
+    std::fprintf(file.get(), "[[[");
+    {
+      output_redirect redir(file.get());
+      std::fprintf(file.get(), "censored");
+    }
+    std::fprintf(file.get(), "]]]");
+  }
+  EXPECT_READ(read_end, "[[[]]]");
+}
+
+// Test that output_redirect handles errors in flush correctly.
+TEST(output_redirect_test, flush_error_in_ctor) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  int write_fd = write_end.descriptor();
+  file write_copy = write_end.dup(write_fd);
+  buffered_file f = write_end.fdopen("w");
+  // Put a character in a file buffer.
+  EXPECT_EQ('x', fputc('x', f.get()));
+  FMT_POSIX(close(write_fd));
+  std::unique_ptr<output_redirect> redir{nullptr};
+  EXPECT_SYSTEM_ERROR_NOASSERT(redir.reset(new output_redirect(f.get())), EBADF,
+                               "cannot flush stream");
+  redir.reset(nullptr);
+  write_copy.dup2(write_fd);  // "undo" close or dtor will fail
+}
+
+TEST(output_redirect_test, dup_error_in_ctor) {
+  buffered_file f = open_buffered_file();
+  int fd = (f.fileno)();
+  file copy = file::dup(fd);
+  FMT_POSIX(close(fd));
+  std::unique_ptr<output_redirect> redir{nullptr};
+  EXPECT_SYSTEM_ERROR_NOASSERT(
+      redir.reset(new output_redirect(f.get())), EBADF,
+      fmt::format("cannot duplicate file descriptor {}", fd));
+  copy.dup2(fd);  // "undo" close or dtor will fail
+}
+
+TEST(output_redirect_test, restore_and_read) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  buffered_file file(write_end.fdopen("w"));
+  std::fprintf(file.get(), "[[[");
+  output_redirect redir(file.get());
+  std::fprintf(file.get(), "censored");
+  EXPECT_EQ("censored", redir.restore_and_read());
+  EXPECT_EQ("", redir.restore_and_read());
+  std::fprintf(file.get(), "]]]");
+  file = buffered_file();
+  EXPECT_READ(read_end, "[[[]]]");
+}
+
+// Test that OutputRedirect handles errors in flush correctly.
+TEST(output_redirect_test, flush_error_in_restore_and_read) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  int write_fd = write_end.descriptor();
+  file write_copy = write_end.dup(write_fd);
+  buffered_file f = write_end.fdopen("w");
+  output_redirect redir(f.get());
+  // Put a character in a file buffer.
+  EXPECT_EQ('x', fputc('x', f.get()));
+  FMT_POSIX(close(write_fd));
+  EXPECT_SYSTEM_ERROR_NOASSERT(redir.restore_and_read(), EBADF,
+                               "cannot flush stream");
+  write_copy.dup2(write_fd);  // "undo" close or dtor will fail
+}
+
+TEST(output_redirect_test, error_in_dtor) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  int write_fd = write_end.descriptor();
+  file write_copy = write_end.dup(write_fd);
+  buffered_file f = write_end.fdopen("w");
+  std::unique_ptr<output_redirect> redir(new output_redirect(f.get()));
+  // Put a character in a file buffer.
+  EXPECT_EQ('x', fputc('x', f.get()));
+  EXPECT_WRITE(
+      stderr,
+      {
+        // The close function must be called inside EXPECT_WRITE,
+        // otherwise the system may recycle closed file descriptor when
+        // redirecting the output in EXPECT_STDERR and the second close
+        // will break output redirection.
+        FMT_POSIX(close(write_fd));
+        SUPPRESS_ASSERT(redir.reset(nullptr));
+      },
+      system_error_message(EBADF, "cannot flush stream"));
+  write_copy.dup2(write_fd);  // "undo" close or dtor of buffered_file will fail
+}
+
+#endif  // FMT_USE_FCNTL
diff --git a/3rdparty/fmt/test/gtest-extra.cc b/3rdparty/fmt/test/gtest-extra.cc
new file mode 100644
index 00000000..1d48a173
--- /dev/null
+++ b/3rdparty/fmt/test/gtest-extra.cc
@@ -0,0 +1,80 @@
+// Formatting library for C++ - custom Google Test assertions
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "gtest-extra.h"
+
+#if FMT_USE_FCNTL
+
+using fmt::file;
+
+output_redirect::output_redirect(FILE* f) : file_(f) {
+  flush();
+  int fd = FMT_POSIX(fileno(f));
+  // Create a file object referring to the original file.
+  original_ = file::dup(fd);
+  // Create a pipe.
+  file write_end;
+  file::pipe(read_end_, write_end);
+  // Connect the passed FILE object to the write end of the pipe.
+  write_end.dup2(fd);
+}
+
+output_redirect::~output_redirect() FMT_NOEXCEPT {
+  try {
+    restore();
+  } catch (const std::exception& e) {
+    std::fputs(e.what(), stderr);
+  }
+}
+
+void output_redirect::flush() {
+  int result = 0;
+  do {
+    result = fflush(file_);
+  } while (result == EOF && errno == EINTR);
+  if (result != 0) throw fmt::system_error(errno, "cannot flush stream");
+}
+
+void output_redirect::restore() {
+  if (original_.descriptor() == -1) return;  // Already restored.
+  flush();
+  // Restore the original file.
+  original_.dup2(FMT_POSIX(fileno(file_)));
+  original_.close();
+}
+
+std::string output_redirect::restore_and_read() {
+  // Restore output.
+  restore();
+
+  // Read everything from the pipe.
+  std::string content;
+  if (read_end_.descriptor() == -1) return content;  // Already read.
+  enum { BUFFER_SIZE = 4096 };
+  char buffer[BUFFER_SIZE];
+  size_t count = 0;
+  do {
+    count = read_end_.read(buffer, BUFFER_SIZE);
+    content.append(buffer, count);
+  } while (count != 0);
+  read_end_.close();
+  return content;
+}
+
+std::string read(file& f, size_t count) {
+  std::string buffer(count, '\0');
+  size_t n = 0, offset = 0;
+  do {
+    n = f.read(&buffer[offset], count - offset);
+    // We can't read more than size_t bytes since count has type size_t.
+    offset += n;
+  } while (offset < count && n != 0);
+  buffer.resize(offset);
+  return buffer;
+}
+
+#endif  // FMT_USE_FCNTL
diff --git a/3rdparty/fmt/test/gtest-extra.h b/3rdparty/fmt/test/gtest-extra.h
new file mode 100644
index 00000000..df2b1d8c
--- /dev/null
+++ b/3rdparty/fmt/test/gtest-extra.h
@@ -0,0 +1,170 @@
+// Formatting library for C++ - custom Google Test assertions
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_GTEST_EXTRA_H_
+#define FMT_GTEST_EXTRA_H_
+
+#include <stdlib.h>  // _invalid_parameter_handler
+
+#include <string>
+
+#ifdef FMT_MODULE_TEST
+import fmt;
+#else
+#  include "fmt/os.h"
+#endif  // FMG_MODULE_TEST
+
+#include "gmock/gmock.h"
+
+#define FMT_TEST_THROW_(statement, expected_exception, expected_message, fail) \
+  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                                \
+  if (::testing::AssertionResult gtest_ar = ::testing::AssertionSuccess()) {   \
+    std::string gtest_expected_message = expected_message;                     \
+    bool gtest_caught_expected = false;                                        \
+    try {                                                                      \
+      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement);               \
+    } catch (expected_exception const& e) {                                    \
+      if (gtest_expected_message != e.what()) {                                \
+        gtest_ar << #statement                                                 \
+            " throws an exception with a different message.\n"                 \
+                 << "Expected: " << gtest_expected_message << "\n"             \
+                 << "  Actual: " << e.what();                                  \
+        goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);            \
+      }                                                                        \
+      gtest_caught_expected = true;                                            \
+    } catch (...) {                                                            \
+      gtest_ar << "Expected: " #statement                                      \
+                  " throws an exception of type " #expected_exception          \
+                  ".\n  Actual: it throws a different type.";                  \
+      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);              \
+    }                                                                          \
+    if (!gtest_caught_expected) {                                              \
+      gtest_ar << "Expected: " #statement                                      \
+                  " throws an exception of type " #expected_exception          \
+                  ".\n  Actual: it throws nothing.";                           \
+      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);              \
+    }                                                                          \
+  } else                                                                       \
+    GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__)                      \
+        : fail(gtest_ar.failure_message())
+
+// Tests that the statement throws the expected exception and the exception's
+// what() method returns expected message.
+#define EXPECT_THROW_MSG(statement, expected_exception, expected_message) \
+  FMT_TEST_THROW_(statement, expected_exception, expected_message,        \
+                  GTEST_NONFATAL_FAILURE_)
+
+inline std::string system_error_message(int error_code,
+                                        const std::string& message) {
+  auto ec = std::error_code(error_code, std::generic_category());
+  return std::system_error(ec, message).what();
+}
+
+#define EXPECT_SYSTEM_ERROR(statement, error_code, message) \
+  EXPECT_THROW_MSG(statement, std::system_error,            \
+                   system_error_message(error_code, message))
+
+#if FMT_USE_FCNTL
+
+// Captures file output by redirecting it to a pipe.
+// The output it can handle is limited by the pipe capacity.
+class output_redirect {
+ private:
+  FILE* file_;
+  fmt::file original_;  // Original file passed to redirector.
+  fmt::file read_end_;  // Read end of the pipe where the output is redirected.
+
+  void flush();
+  void restore();
+
+ public:
+  explicit output_redirect(FILE* file);
+  ~output_redirect() FMT_NOEXCEPT;
+
+  output_redirect(const output_redirect&) = delete;
+  void operator=(const output_redirect&) = delete;
+
+  // Restores the original file, reads output from the pipe into a string
+  // and returns it.
+  std::string restore_and_read();
+};
+
+#  define FMT_TEST_WRITE_(statement, expected_output, file, fail)              \
+    GTEST_AMBIGUOUS_ELSE_BLOCKER_                                              \
+    if (::testing::AssertionResult gtest_ar = ::testing::AssertionSuccess()) { \
+      std::string gtest_expected_output = expected_output;                     \
+      output_redirect gtest_redir(file);                                       \
+      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement);               \
+      std::string gtest_output = gtest_redir.restore_and_read();               \
+      if (gtest_output != gtest_expected_output) {                             \
+        gtest_ar << #statement " produces different output.\n"                 \
+                 << "Expected: " << gtest_expected_output << "\n"              \
+                 << "  Actual: " << gtest_output;                              \
+        goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);            \
+      }                                                                        \
+    } else                                                                     \
+      GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__)                    \
+          : fail(gtest_ar.failure_message())
+
+// Tests that the statement writes the expected output to file.
+#  define EXPECT_WRITE(file, statement, expected_output) \
+    FMT_TEST_WRITE_(statement, expected_output, file, GTEST_NONFATAL_FAILURE_)
+
+#  ifdef _MSC_VER
+
+// Suppresses Windows assertions on invalid file descriptors, making
+// POSIX functions return proper error codes instead of crashing on Windows.
+class suppress_assert {
+ private:
+  _invalid_parameter_handler original_handler_;
+  int original_report_mode_;
+
+  static void handle_invalid_parameter(const wchar_t*, const wchar_t*,
+                                       const wchar_t*, unsigned, uintptr_t) {}
+
+ public:
+  suppress_assert()
+      : original_handler_(
+            _set_invalid_parameter_handler(handle_invalid_parameter)),
+        original_report_mode_(_CrtSetReportMode(_CRT_ASSERT, 0)) {}
+  ~suppress_assert() {
+    _set_invalid_parameter_handler(original_handler_);
+    _CrtSetReportMode(_CRT_ASSERT, original_report_mode_);
+    (void)original_report_mode_;
+  }
+};
+
+#    define SUPPRESS_ASSERT(statement) \
+      {                                \
+        suppress_assert sa;            \
+        statement;                     \
+      }
+#  else
+#    define SUPPRESS_ASSERT(statement) statement
+#  endif  // _MSC_VER
+
+#  define EXPECT_SYSTEM_ERROR_NOASSERT(statement, error_code, message) \
+    EXPECT_SYSTEM_ERROR(SUPPRESS_ASSERT(statement), error_code, message)
+
+// Attempts to read count characters from a file.
+std::string read(fmt::file& f, size_t count);
+
+#  define EXPECT_READ(file, expected_content) \
+    EXPECT_EQ(expected_content,               \
+              read(file, fmt::string_view(expected_content).size()))
+
+#else
+#  define EXPECT_WRITE(file, statement, expected_output) \
+    do {                                                 \
+      (void)(file);                                      \
+      (void)(statement);                                 \
+      (void)(expected_output);                           \
+      SUCCEED();                                         \
+    } while (false)
+#endif  // FMT_USE_FCNTL
+
+#endif  // FMT_GTEST_EXTRA_H_
diff --git a/3rdparty/fmt/test/gtest/.clang-format b/3rdparty/fmt/test/gtest/.clang-format
new file mode 100644
index 00000000..ec09b9b6
--- /dev/null
+++ b/3rdparty/fmt/test/gtest/.clang-format
@@ -0,0 +1,3 @@
+# Disable clang-format here
+DisableFormat: true
+SortIncludes: Never
diff --git a/3rdparty/fmt/test/gtest/CMakeLists.txt b/3rdparty/fmt/test/gtest/CMakeLists.txt
new file mode 100644
index 00000000..0cc4e1aa
--- /dev/null
+++ b/3rdparty/fmt/test/gtest/CMakeLists.txt
@@ -0,0 +1,38 @@
+#------------------------------------------------------------------------------
+# Build the google test library
+
+# We compile Google Test ourselves instead of using pre-compiled libraries.
+# See the Google Test FAQ "Why is it not recommended to install a
+# pre-compiled copy of Google Test (for example, into /usr/local)?"
+# at http://code.google.com/p/googletest/wiki/FAQ for more details.
+add_library(gtest STATIC
+  gmock-gtest-all.cc gmock/gmock.h gtest/gtest.h gtest/gtest-spi.h)
+target_compile_definitions(gtest PUBLIC GTEST_HAS_STD_WSTRING=1)
+target_include_directories(gtest SYSTEM PUBLIC .)
+
+find_package(Threads)
+if (Threads_FOUND)
+  target_link_libraries(gtest ${CMAKE_THREAD_LIBS_INIT})
+else ()
+  target_compile_definitions(gtest PUBLIC GTEST_HAS_PTHREAD=0)
+endif ()
+
+# Workaround GTest bug https://github.com/google/googletest/issues/705.
+check_cxx_compiler_flag(
+  -fno-delete-null-pointer-checks HAVE_FNO_DELETE_NULL_POINTER_CHECKS)
+if (HAVE_FNO_DELETE_NULL_POINTER_CHECKS)
+  target_compile_options(gtest PUBLIC -fno-delete-null-pointer-checks)
+endif ()
+
+if (MSVC)
+  # Disable MSVC warnings of _CRT_INSECURE_DEPRECATE functions.
+  target_compile_definitions(gtest PRIVATE _CRT_SECURE_NO_WARNINGS)
+  if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+    # Disable MSVC warnings of POSIX functions.
+    target_compile_options(gtest PUBLIC -Wno-deprecated-declarations)
+  endif ()
+endif ()
+
+# Silence MSVC tr1 deprecation warning in gmock.
+target_compile_definitions(gtest
+  PUBLIC _SILENCE_TR1_NAMESPACE_DEPRECATION_WARNING=1)
diff --git a/3rdparty/fmt/test/gtest/gmock-gtest-all.cc b/3rdparty/fmt/test/gtest/gmock-gtest-all.cc
new file mode 100644
index 00000000..b67316c3
--- /dev/null
+++ b/3rdparty/fmt/test/gtest/gmock-gtest-all.cc
@@ -0,0 +1,14434 @@
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//
+// Google C++ Testing and Mocking Framework (Google Test)
+//
+// Sometimes it's desirable to build Google Test by compiling a single file.
+// This file serves this purpose.
+
+// This line ensures that gtest.h can be compiled on its own, even
+// when it's fused.
+#include "gtest/gtest.h"
+
+// The following lines pull in the real gtest *.cc files.
+// Copyright 2005, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//
+// The Google C++ Testing and Mocking Framework (Google Test)
+
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//
+// Utilities for testing Google Test itself and code that uses Google Test
+// (e.g. frameworks built on top of Google Test).
+
+// GOOGLETEST_CM0004 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
+#define GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
+
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
+/* class A needs to have dll-interface to be used by clients of class B */)
+
+namespace testing {
+
+// This helper class can be used to mock out Google Test failure reporting
+// so that we can test Google Test or code that builds on Google Test.
+//
+// An object of this class appends a TestPartResult object to the
+// TestPartResultArray object given in the constructor whenever a Google Test
+// failure is reported. It can either intercept only failures that are
+// generated in the same thread that created this object or it can intercept
+// all generated failures. The scope of this mock object can be controlled with
+// the second argument to the two arguments constructor.
+class GTEST_API_ ScopedFakeTestPartResultReporter
+    : public TestPartResultReporterInterface {
+ public:
+  // The two possible mocking modes of this object.
+  enum InterceptMode {
+    INTERCEPT_ONLY_CURRENT_THREAD,  // Intercepts only thread local failures.
+    INTERCEPT_ALL_THREADS           // Intercepts all failures.
+  };
+
+  // The c'tor sets this object as the test part result reporter used
+  // by Google Test.  The 'result' parameter specifies where to report the
+  // results. This reporter will only catch failures generated in the current
+  // thread. DEPRECATED
+  explicit ScopedFakeTestPartResultReporter(TestPartResultArray* result);
+
+  // Same as above, but you can choose the interception scope of this object.
+  ScopedFakeTestPartResultReporter(InterceptMode intercept_mode,
+                                   TestPartResultArray* result);
+
+  // The d'tor restores the previous test part result reporter.
+  ~ScopedFakeTestPartResultReporter() override;
+
+  // Appends the TestPartResult object to the TestPartResultArray
+  // received in the constructor.
+  //
+  // This method is from the TestPartResultReporterInterface
+  // interface.
+  void ReportTestPartResult(const TestPartResult& result) override;
+
+ private:
+  void Init();
+
+  const InterceptMode intercept_mode_;
+  TestPartResultReporterInterface* old_reporter_;
+  TestPartResultArray* const result_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedFakeTestPartResultReporter);
+};
+
+namespace internal {
+
+// A helper class for implementing EXPECT_FATAL_FAILURE() and
+// EXPECT_NONFATAL_FAILURE().  Its destructor verifies that the given
+// TestPartResultArray contains exactly one failure that has the given
+// type and contains the given substring.  If that's not the case, a
+// non-fatal failure will be generated.
+class GTEST_API_ SingleFailureChecker {
+ public:
+  // The constructor remembers the arguments.
+  SingleFailureChecker(const TestPartResultArray* results,
+                       TestPartResult::Type type, const std::string& substr);
+  ~SingleFailureChecker();
+ private:
+  const TestPartResultArray* const results_;
+  const TestPartResult::Type type_;
+  const std::string substr_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(SingleFailureChecker);
+};
+
+}  // namespace internal
+
+}  // namespace testing
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
+
+// A set of macros for testing Google Test assertions or code that's expected
+// to generate Google Test fatal failures.  It verifies that the given
+// statement will cause exactly one fatal Google Test failure with 'substr'
+// being part of the failure message.
+//
+// There are two different versions of this macro. EXPECT_FATAL_FAILURE only
+// affects and considers failures generated in the current thread and
+// EXPECT_FATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
+//
+// The verification of the assertion is done correctly even when the statement
+// throws an exception or aborts the current function.
+//
+// Known restrictions:
+//   - 'statement' cannot reference local non-static variables or
+//     non-static members of the current object.
+//   - 'statement' cannot return a value.
+//   - You cannot stream a failure message to this macro.
+//
+// Note that even though the implementations of the following two
+// macros are much alike, we cannot refactor them to use a common
+// helper macro, due to some peculiarity in how the preprocessor
+// works.  The AcceptsMacroThatExpandsToUnprotectedComma test in
+// gtest_unittest.cc will fail to compile if we do that.
+#define EXPECT_FATAL_FAILURE(statement, substr) \
+  do { \
+    class GTestExpectFatalFailureHelper {\
+     public:\
+      static void Execute() { statement; }\
+    };\
+    ::testing::TestPartResultArray gtest_failures;\
+    ::testing::internal::SingleFailureChecker gtest_checker(\
+        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
+    {\
+      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
+          ::testing::ScopedFakeTestPartResultReporter:: \
+          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
+      GTestExpectFatalFailureHelper::Execute();\
+    }\
+  } while (::testing::internal::AlwaysFalse())
+
+#define EXPECT_FATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
+  do { \
+    class GTestExpectFatalFailureHelper {\
+     public:\
+      static void Execute() { statement; }\
+    };\
+    ::testing::TestPartResultArray gtest_failures;\
+    ::testing::internal::SingleFailureChecker gtest_checker(\
+        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
+    {\
+      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
+          ::testing::ScopedFakeTestPartResultReporter:: \
+          INTERCEPT_ALL_THREADS, &gtest_failures);\
+      GTestExpectFatalFailureHelper::Execute();\
+    }\
+  } while (::testing::internal::AlwaysFalse())
+
+// A macro for testing Google Test assertions or code that's expected to
+// generate Google Test non-fatal failures.  It asserts that the given
+// statement will cause exactly one non-fatal Google Test failure with 'substr'
+// being part of the failure message.
+//
+// There are two different versions of this macro. EXPECT_NONFATAL_FAILURE only
+// affects and considers failures generated in the current thread and
+// EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
+//
+// 'statement' is allowed to reference local variables and members of
+// the current object.
+//
+// The verification of the assertion is done correctly even when the statement
+// throws an exception or aborts the current function.
+//
+// Known restrictions:
+//   - You cannot stream a failure message to this macro.
+//
+// Note that even though the implementations of the following two
+// macros are much alike, we cannot refactor them to use a common
+// helper macro, due to some peculiarity in how the preprocessor
+// works.  If we do that, the code won't compile when the user gives
+// EXPECT_NONFATAL_FAILURE() a statement that contains a macro that
+// expands to code containing an unprotected comma.  The
+// AcceptsMacroThatExpandsToUnprotectedComma test in gtest_unittest.cc
+// catches that.
+//
+// For the same reason, we have to write
+//   if (::testing::internal::AlwaysTrue()) { statement; }
+// instead of
+//   GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
+// to avoid an MSVC warning on unreachable code.
+#define EXPECT_NONFATAL_FAILURE(statement, substr) \
+  do {\
+    ::testing::TestPartResultArray gtest_failures;\
+    ::testing::internal::SingleFailureChecker gtest_checker(\
+        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
+        (substr));\
+    {\
+      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
+          ::testing::ScopedFakeTestPartResultReporter:: \
+          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
+      if (::testing::internal::AlwaysTrue()) { statement; }\
+    }\
+  } while (::testing::internal::AlwaysFalse())
+
+#define EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
+  do {\
+    ::testing::TestPartResultArray gtest_failures;\
+    ::testing::internal::SingleFailureChecker gtest_checker(\
+        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
+        (substr));\
+    {\
+      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
+          ::testing::ScopedFakeTestPartResultReporter::INTERCEPT_ALL_THREADS, \
+          &gtest_failures);\
+      if (::testing::internal::AlwaysTrue()) { statement; }\
+    }\
+  } while (::testing::internal::AlwaysFalse())
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <wchar.h>
+#include <wctype.h>
+
+#include <algorithm>
+#include <chrono>  // NOLINT
+#include <cmath>
+#include <cstdint>
+#include <iomanip>
+#include <limits>
+#include <list>
+#include <map>
+#include <ostream>  // NOLINT
+#include <sstream>
+#include <vector>
+
+#if GTEST_OS_LINUX
+
+# include <fcntl.h>  // NOLINT
+# include <limits.h>  // NOLINT
+# include <sched.h>  // NOLINT
+// Declares vsnprintf().  This header is not available on Windows.
+# include <strings.h>  // NOLINT
+# include <sys/mman.h>  // NOLINT
+# include <sys/time.h>  // NOLINT
+# include <unistd.h>  // NOLINT
+# include <string>
+
+#elif GTEST_OS_ZOS
+# include <sys/time.h>  // NOLINT
+
+// On z/OS we additionally need strings.h for strcasecmp.
+# include <strings.h>  // NOLINT
+
+#elif GTEST_OS_WINDOWS_MOBILE  // We are on Windows CE.
+
+# include <windows.h>  // NOLINT
+# undef min
+
+#elif GTEST_OS_WINDOWS  // We are on Windows proper.
+
+# include <windows.h>  // NOLINT
+# undef min
+
+#ifdef _MSC_VER
+# include <crtdbg.h>  // NOLINT
+#endif
+
+# include <io.h>  // NOLINT
+# include <sys/timeb.h>  // NOLINT
+# include <sys/types.h>  // NOLINT
+# include <sys/stat.h>  // NOLINT
+
+# if GTEST_OS_WINDOWS_MINGW
+#  include <sys/time.h>  // NOLINT
+# endif  // GTEST_OS_WINDOWS_MINGW
+
+#else
+
+// cpplint thinks that the header is already included, so we want to
+// silence it.
+# include <sys/time.h>  // NOLINT
+# include <unistd.h>  // NOLINT
+
+#endif  // GTEST_OS_LINUX
+
+#if GTEST_HAS_EXCEPTIONS
+# include <stdexcept>
+#endif
+
+#if GTEST_CAN_STREAM_RESULTS_
+# include <arpa/inet.h>  // NOLINT
+# include <netdb.h>  // NOLINT
+# include <sys/socket.h>  // NOLINT
+# include <sys/types.h>  // NOLINT
+#endif
+
+// Copyright 2005, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Utility functions and classes used by the Google C++ testing framework.//
+// This file contains purely Google Test's internal implementation.  Please
+// DO NOT #INCLUDE IT IN A USER PROGRAM.
+
+#ifndef GOOGLETEST_SRC_GTEST_INTERNAL_INL_H_
+#define GOOGLETEST_SRC_GTEST_INTERNAL_INL_H_
+
+#ifndef _WIN32_WCE
+# include <errno.h>
+#endif  // !_WIN32_WCE
+#include <stddef.h>
+#include <stdlib.h>  // For strtoll/_strtoul64/malloc/free.
+#include <string.h>  // For memmove.
+
+#include <algorithm>
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <vector>
+
+
+#if GTEST_CAN_STREAM_RESULTS_
+# include <arpa/inet.h>  // NOLINT
+# include <netdb.h>  // NOLINT
+#endif
+
+#if GTEST_OS_WINDOWS
+# include <windows.h>  // NOLINT
+#endif  // GTEST_OS_WINDOWS
+
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
+/* class A needs to have dll-interface to be used by clients of class B */)
+
+namespace testing {
+
+// Declares the flags.
+//
+// We don't want the users to modify this flag in the code, but want
+// Google Test's own unit tests to be able to access it. Therefore we
+// declare it here as opposed to in gtest.h.
+GTEST_DECLARE_bool_(death_test_use_fork);
+
+namespace internal {
+
+// The value of GetTestTypeId() as seen from within the Google Test
+// library.  This is solely for testing GetTestTypeId().
+GTEST_API_ extern const TypeId kTestTypeIdInGoogleTest;
+
+// Names of the flags (needed for parsing Google Test flags).
+const char kAlsoRunDisabledTestsFlag[] = "also_run_disabled_tests";
+const char kBreakOnFailureFlag[] = "break_on_failure";
+const char kCatchExceptionsFlag[] = "catch_exceptions";
+const char kColorFlag[] = "color";
+const char kFailFast[] = "fail_fast";
+const char kFilterFlag[] = "filter";
+const char kListTestsFlag[] = "list_tests";
+const char kOutputFlag[] = "output";
+const char kBriefFlag[] = "brief";
+const char kPrintTimeFlag[] = "print_time";
+const char kPrintUTF8Flag[] = "print_utf8";
+const char kRandomSeedFlag[] = "random_seed";
+const char kRepeatFlag[] = "repeat";
+const char kShuffleFlag[] = "shuffle";
+const char kStackTraceDepthFlag[] = "stack_trace_depth";
+const char kStreamResultToFlag[] = "stream_result_to";
+const char kThrowOnFailureFlag[] = "throw_on_failure";
+const char kFlagfileFlag[] = "flagfile";
+
+// A valid random seed must be in [1, kMaxRandomSeed].
+const int kMaxRandomSeed = 99999;
+
+// g_help_flag is true if and only if the --help flag or an equivalent form
+// is specified on the command line.
+GTEST_API_ extern bool g_help_flag;
+
+// Returns the current time in milliseconds.
+GTEST_API_ TimeInMillis GetTimeInMillis();
+
+// Returns true if and only if Google Test should use colors in the output.
+GTEST_API_ bool ShouldUseColor(bool stdout_is_tty);
+
+// Formats the given time in milliseconds as seconds.
+GTEST_API_ std::string FormatTimeInMillisAsSeconds(TimeInMillis ms);
+
+// Converts the given time in milliseconds to a date string in the ISO 8601
+// format, without the timezone information.  N.B.: due to the use the
+// non-reentrant localtime() function, this function is not thread safe.  Do
+// not use it in any code that can be called from multiple threads.
+GTEST_API_ std::string FormatEpochTimeInMillisAsIso8601(TimeInMillis ms);
+
+// Parses a string for an Int32 flag, in the form of "--flag=value".
+//
+// On success, stores the value of the flag in *value, and returns
+// true.  On failure, returns false without changing *value.
+GTEST_API_ bool ParseInt32Flag(
+    const char* str, const char* flag, int32_t* value);
+
+// Returns a random seed in range [1, kMaxRandomSeed] based on the
+// given --gtest_random_seed flag value.
+inline int GetRandomSeedFromFlag(int32_t random_seed_flag) {
+  const unsigned int raw_seed = (random_seed_flag == 0) ?
+      static_cast<unsigned int>(GetTimeInMillis()) :
+      static_cast<unsigned int>(random_seed_flag);
+
+  // Normalizes the actual seed to range [1, kMaxRandomSeed] such that
+  // it's easy to type.
+  const int normalized_seed =
+      static_cast<int>((raw_seed - 1U) %
+                       static_cast<unsigned int>(kMaxRandomSeed)) + 1;
+  return normalized_seed;
+}
+
+// Returns the first valid random seed after 'seed'.  The behavior is
+// undefined if 'seed' is invalid.  The seed after kMaxRandomSeed is
+// considered to be 1.
+inline int GetNextRandomSeed(int seed) {
+  GTEST_CHECK_(1 <= seed && seed <= kMaxRandomSeed)
+      << "Invalid random seed " << seed << " - must be in [1, "
+      << kMaxRandomSeed << "].";
+  const int next_seed = seed + 1;
+  return (next_seed > kMaxRandomSeed) ? 1 : next_seed;
+}
+
+// This class saves the values of all Google Test flags in its c'tor, and
+// restores them in its d'tor.
+class GTestFlagSaver {
+ public:
+  // The c'tor.
+  GTestFlagSaver() {
+    also_run_disabled_tests_ = GTEST_FLAG(also_run_disabled_tests);
+    break_on_failure_ = GTEST_FLAG(break_on_failure);
+    catch_exceptions_ = GTEST_FLAG(catch_exceptions);
+    color_ = GTEST_FLAG(color);
+    death_test_style_ = GTEST_FLAG(death_test_style);
+    death_test_use_fork_ = GTEST_FLAG(death_test_use_fork);
+    fail_fast_ = GTEST_FLAG(fail_fast);
+    filter_ = GTEST_FLAG(filter);
+    internal_run_death_test_ = GTEST_FLAG(internal_run_death_test);
+    list_tests_ = GTEST_FLAG(list_tests);
+    output_ = GTEST_FLAG(output);
+    brief_ = GTEST_FLAG(brief);
+    print_time_ = GTEST_FLAG(print_time);
+    print_utf8_ = GTEST_FLAG(print_utf8);
+    random_seed_ = GTEST_FLAG(random_seed);
+    repeat_ = GTEST_FLAG(repeat);
+    shuffle_ = GTEST_FLAG(shuffle);
+    stack_trace_depth_ = GTEST_FLAG(stack_trace_depth);
+    stream_result_to_ = GTEST_FLAG(stream_result_to);
+    throw_on_failure_ = GTEST_FLAG(throw_on_failure);
+  }
+
+  // The d'tor is not virtual.  DO NOT INHERIT FROM THIS CLASS.
+  ~GTestFlagSaver() {
+    GTEST_FLAG(also_run_disabled_tests) = also_run_disabled_tests_;
+    GTEST_FLAG(break_on_failure) = break_on_failure_;
+    GTEST_FLAG(catch_exceptions) = catch_exceptions_;
+    GTEST_FLAG(color) = color_;
+    GTEST_FLAG(death_test_style) = death_test_style_;
+    GTEST_FLAG(death_test_use_fork) = death_test_use_fork_;
+    GTEST_FLAG(filter) = filter_;
+    GTEST_FLAG(fail_fast) = fail_fast_;
+    GTEST_FLAG(internal_run_death_test) = internal_run_death_test_;
+    GTEST_FLAG(list_tests) = list_tests_;
+    GTEST_FLAG(output) = output_;
+    GTEST_FLAG(brief) = brief_;
+    GTEST_FLAG(print_time) = print_time_;
+    GTEST_FLAG(print_utf8) = print_utf8_;
+    GTEST_FLAG(random_seed) = random_seed_;
+    GTEST_FLAG(repeat) = repeat_;
+    GTEST_FLAG(shuffle) = shuffle_;
+    GTEST_FLAG(stack_trace_depth) = stack_trace_depth_;
+    GTEST_FLAG(stream_result_to) = stream_result_to_;
+    GTEST_FLAG(throw_on_failure) = throw_on_failure_;
+  }
+
+ private:
+  // Fields for saving the original values of flags.
+  bool also_run_disabled_tests_;
+  bool break_on_failure_;
+  bool catch_exceptions_;
+  std::string color_;
+  std::string death_test_style_;
+  bool death_test_use_fork_;
+  bool fail_fast_;
+  std::string filter_;
+  std::string internal_run_death_test_;
+  bool list_tests_;
+  std::string output_;
+  bool brief_;
+  bool print_time_;
+  bool print_utf8_;
+  int32_t random_seed_;
+  int32_t repeat_;
+  bool shuffle_;
+  int32_t stack_trace_depth_;
+  std::string stream_result_to_;
+  bool throw_on_failure_;
+} GTEST_ATTRIBUTE_UNUSED_;
+
+// Converts a Unicode code point to a narrow string in UTF-8 encoding.
+// code_point parameter is of type UInt32 because wchar_t may not be
+// wide enough to contain a code point.
+// If the code_point is not a valid Unicode code point
+// (i.e. outside of Unicode range U+0 to U+10FFFF) it will be converted
+// to "(Invalid Unicode 0xXXXXXXXX)".
+GTEST_API_ std::string CodePointToUtf8(uint32_t code_point);
+
+// Converts a wide string to a narrow string in UTF-8 encoding.
+// The wide string is assumed to have the following encoding:
+//   UTF-16 if sizeof(wchar_t) == 2 (on Windows, Cygwin)
+//   UTF-32 if sizeof(wchar_t) == 4 (on Linux)
+// Parameter str points to a null-terminated wide string.
+// Parameter num_chars may additionally limit the number
+// of wchar_t characters processed. -1 is used when the entire string
+// should be processed.
+// If the string contains code points that are not valid Unicode code points
+// (i.e. outside of Unicode range U+0 to U+10FFFF) they will be output
+// as '(Invalid Unicode 0xXXXXXXXX)'. If the string is in UTF16 encoding
+// and contains invalid UTF-16 surrogate pairs, values in those pairs
+// will be encoded as individual Unicode characters from Basic Normal Plane.
+GTEST_API_ std::string WideStringToUtf8(const wchar_t* str, int num_chars);
+
+// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
+// if the variable is present. If a file already exists at this location, this
+// function will write over it. If the variable is present, but the file cannot
+// be created, prints an error and exits.
+void WriteToShardStatusFileIfNeeded();
+
+// Checks whether sharding is enabled by examining the relevant
+// environment variable values. If the variables are present,
+// but inconsistent (e.g., shard_index >= total_shards), prints
+// an error and exits. If in_subprocess_for_death_test, sharding is
+// disabled because it must only be applied to the original test
+// process. Otherwise, we could filter out death tests we intended to execute.
+GTEST_API_ bool ShouldShard(const char* total_shards_str,
+                            const char* shard_index_str,
+                            bool in_subprocess_for_death_test);
+
+// Parses the environment variable var as a 32-bit integer. If it is unset,
+// returns default_val. If it is not a 32-bit integer, prints an error and
+// and aborts.
+GTEST_API_ int32_t Int32FromEnvOrDie(const char* env_var, int32_t default_val);
+
+// Given the total number of shards, the shard index, and the test id,
+// returns true if and only if the test should be run on this shard. The test id
+// is some arbitrary but unique non-negative integer assigned to each test
+// method. Assumes that 0 <= shard_index < total_shards.
+GTEST_API_ bool ShouldRunTestOnShard(
+    int total_shards, int shard_index, int test_id);
+
+// STL container utilities.
+
+// Returns the number of elements in the given container that satisfy
+// the given predicate.
+template <class Container, typename Predicate>
+inline int CountIf(const Container& c, Predicate predicate) {
+  // Implemented as an explicit loop since std::count_if() in libCstd on
+  // Solaris has a non-standard signature.
+  int count = 0;
+  for (typename Container::const_iterator it = c.begin(); it != c.end(); ++it) {
+    if (predicate(*it))
+      ++count;
+  }
+  return count;
+}
+
+// Applies a function/functor to each element in the container.
+template <class Container, typename Functor>
+void ForEach(const Container& c, Functor functor) {
+  std::for_each(c.begin(), c.end(), functor);
+}
+
+// Returns the i-th element of the vector, or default_value if i is not
+// in range [0, v.size()).
+template <typename E>
+inline E GetElementOr(const std::vector<E>& v, int i, E default_value) {
+  return (i < 0 || i >= static_cast<int>(v.size())) ? default_value
+                                                    : v[static_cast<size_t>(i)];
+}
+
+// Performs an in-place shuffle of a range of the vector's elements.
+// 'begin' and 'end' are element indices as an STL-style range;
+// i.e. [begin, end) are shuffled, where 'end' == size() means to
+// shuffle to the end of the vector.
+template <typename E>
+void ShuffleRange(internal::Random* random, int begin, int end,
+                  std::vector<E>* v) {
+  const int size = static_cast<int>(v->size());
+  GTEST_CHECK_(0 <= begin && begin <= size)
+      << "Invalid shuffle range start " << begin << ": must be in range [0, "
+      << size << "].";
+  GTEST_CHECK_(begin <= end && end <= size)
+      << "Invalid shuffle range finish " << end << ": must be in range ["
+      << begin << ", " << size << "].";
+
+  // Fisher-Yates shuffle, from
+  // http://en.wikipedia.org/wiki/Fisher-Yates_shuffle
+  for (int range_width = end - begin; range_width >= 2; range_width--) {
+    const int last_in_range = begin + range_width - 1;
+    const int selected =
+        begin +
+        static_cast<int>(random->Generate(static_cast<uint32_t>(range_width)));
+    std::swap((*v)[static_cast<size_t>(selected)],
+              (*v)[static_cast<size_t>(last_in_range)]);
+  }
+}
+
+// Performs an in-place shuffle of the vector's elements.
+template <typename E>
+inline void Shuffle(internal::Random* random, std::vector<E>* v) {
+  ShuffleRange(random, 0, static_cast<int>(v->size()), v);
+}
+
+// A function for deleting an object.  Handy for being used as a
+// functor.
+template <typename T>
+static void Delete(T* x) {
+  delete x;
+}
+
+// A predicate that checks the key of a TestProperty against a known key.
+//
+// TestPropertyKeyIs is copyable.
+class TestPropertyKeyIs {
+ public:
+  // Constructor.
+  //
+  // TestPropertyKeyIs has NO default constructor.
+  explicit TestPropertyKeyIs(const std::string& key) : key_(key) {}
+
+  // Returns true if and only if the test name of test property matches on key_.
+  bool operator()(const TestProperty& test_property) const {
+    return test_property.key() == key_;
+  }
+
+ private:
+  std::string key_;
+};
+
+// Class UnitTestOptions.
+//
+// This class contains functions for processing options the user
+// specifies when running the tests.  It has only static members.
+//
+// In most cases, the user can specify an option using either an
+// environment variable or a command line flag.  E.g. you can set the
+// test filter using either GTEST_FILTER or --gtest_filter.  If both
+// the variable and the flag are present, the latter overrides the
+// former.
+class GTEST_API_ UnitTestOptions {
+ public:
+  // Functions for processing the gtest_output flag.
+
+  // Returns the output format, or "" for normal printed output.
+  static std::string GetOutputFormat();
+
+  // Returns the absolute path of the requested output file, or the
+  // default (test_detail.xml in the original working directory) if
+  // none was explicitly specified.
+  static std::string GetAbsolutePathToOutputFile();
+
+  // Functions for processing the gtest_filter flag.
+
+  // Returns true if and only if the user-specified filter matches the test
+  // suite name and the test name.
+  static bool FilterMatchesTest(const std::string& test_suite_name,
+                                const std::string& test_name);
+
+#if GTEST_OS_WINDOWS
+  // Function for supporting the gtest_catch_exception flag.
+
+  // Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
+  // given SEH exception, or EXCEPTION_CONTINUE_SEARCH otherwise.
+  // This function is useful as an __except condition.
+  static int GTestShouldProcessSEH(DWORD exception_code);
+#endif  // GTEST_OS_WINDOWS
+
+  // Returns true if "name" matches the ':' separated list of glob-style
+  // filters in "filter".
+  static bool MatchesFilter(const std::string& name, const char* filter);
+};
+
+// Returns the current application's name, removing directory path if that
+// is present.  Used by UnitTestOptions::GetOutputFile.
+GTEST_API_ FilePath GetCurrentExecutableName();
+
+// The role interface for getting the OS stack trace as a string.
+class OsStackTraceGetterInterface {
+ public:
+  OsStackTraceGetterInterface() {}
+  virtual ~OsStackTraceGetterInterface() {}
+
+  // Returns the current OS stack trace as an std::string.  Parameters:
+  //
+  //   max_depth  - the maximum number of stack frames to be included
+  //                in the trace.
+  //   skip_count - the number of top frames to be skipped; doesn't count
+  //                against max_depth.
+  virtual std::string CurrentStackTrace(int max_depth, int skip_count) = 0;
+
+  // UponLeavingGTest() should be called immediately before Google Test calls
+  // user code. It saves some information about the current stack that
+  // CurrentStackTrace() will use to find and hide Google Test stack frames.
+  virtual void UponLeavingGTest() = 0;
+
+  // This string is inserted in place of stack frames that are part of
+  // Google Test's implementation.
+  static const char* const kElidedFramesMarker;
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(OsStackTraceGetterInterface);
+};
+
+// A working implementation of the OsStackTraceGetterInterface interface.
+class OsStackTraceGetter : public OsStackTraceGetterInterface {
+ public:
+  OsStackTraceGetter() {}
+
+  std::string CurrentStackTrace(int max_depth, int skip_count) override;
+  void UponLeavingGTest() override;
+
+ private:
+#if GTEST_HAS_ABSL
+  Mutex mutex_;  // Protects all internal state.
+
+  // We save the stack frame below the frame that calls user code.
+  // We do this because the address of the frame immediately below
+  // the user code changes between the call to UponLeavingGTest()
+  // and any calls to the stack trace code from within the user code.
+  void* caller_frame_ = nullptr;
+#endif  // GTEST_HAS_ABSL
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(OsStackTraceGetter);
+};
+
+// Information about a Google Test trace point.
+struct TraceInfo {
+  const char* file;
+  int line;
+  std::string message;
+};
+
+// This is the default global test part result reporter used in UnitTestImpl.
+// This class should only be used by UnitTestImpl.
+class DefaultGlobalTestPartResultReporter
+  : public TestPartResultReporterInterface {
+ public:
+  explicit DefaultGlobalTestPartResultReporter(UnitTestImpl* unit_test);
+  // Implements the TestPartResultReporterInterface. Reports the test part
+  // result in the current test.
+  void ReportTestPartResult(const TestPartResult& result) override;
+
+ private:
+  UnitTestImpl* const unit_test_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultGlobalTestPartResultReporter);
+};
+
+// This is the default per thread test part result reporter used in
+// UnitTestImpl. This class should only be used by UnitTestImpl.
+class DefaultPerThreadTestPartResultReporter
+    : public TestPartResultReporterInterface {
+ public:
+  explicit DefaultPerThreadTestPartResultReporter(UnitTestImpl* unit_test);
+  // Implements the TestPartResultReporterInterface. The implementation just
+  // delegates to the current global test part result reporter of *unit_test_.
+  void ReportTestPartResult(const TestPartResult& result) override;
+
+ private:
+  UnitTestImpl* const unit_test_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultPerThreadTestPartResultReporter);
+};
+
+// The private implementation of the UnitTest class.  We don't protect
+// the methods under a mutex, as this class is not accessible by a
+// user and the UnitTest class that delegates work to this class does
+// proper locking.
+class GTEST_API_ UnitTestImpl {
+ public:
+  explicit UnitTestImpl(UnitTest* parent);
+  virtual ~UnitTestImpl();
+
+  // There are two different ways to register your own TestPartResultReporter.
+  // You can register your own repoter to listen either only for test results
+  // from the current thread or for results from all threads.
+  // By default, each per-thread test result repoter just passes a new
+  // TestPartResult to the global test result reporter, which registers the
+  // test part result for the currently running test.
+
+  // Returns the global test part result reporter.
+  TestPartResultReporterInterface* GetGlobalTestPartResultReporter();
+
+  // Sets the global test part result reporter.
+  void SetGlobalTestPartResultReporter(
+      TestPartResultReporterInterface* reporter);
+
+  // Returns the test part result reporter for the current thread.
+  TestPartResultReporterInterface* GetTestPartResultReporterForCurrentThread();
+
+  // Sets the test part result reporter for the current thread.
+  void SetTestPartResultReporterForCurrentThread(
+      TestPartResultReporterInterface* reporter);
+
+  // Gets the number of successful test suites.
+  int successful_test_suite_count() const;
+
+  // Gets the number of failed test suites.
+  int failed_test_suite_count() const;
+
+  // Gets the number of all test suites.
+  int total_test_suite_count() const;
+
+  // Gets the number of all test suites that contain at least one test
+  // that should run.
+  int test_suite_to_run_count() const;
+
+  // Gets the number of successful tests.
+  int successful_test_count() const;
+
+  // Gets the number of skipped tests.
+  int skipped_test_count() const;
+
+  // Gets the number of failed tests.
+  int failed_test_count() const;
+
+  // Gets the number of disabled tests that will be reported in the XML report.
+  int reportable_disabled_test_count() const;
+
+  // Gets the number of disabled tests.
+  int disabled_test_count() const;
+
+  // Gets the number of tests to be printed in the XML report.
+  int reportable_test_count() const;
+
+  // Gets the number of all tests.
+  int total_test_count() const;
+
+  // Gets the number of tests that should run.
+  int test_to_run_count() const;
+
+  // Gets the time of the test program start, in ms from the start of the
+  // UNIX epoch.
+  TimeInMillis start_timestamp() const { return start_timestamp_; }
+
+  // Gets the elapsed time, in milliseconds.
+  TimeInMillis elapsed_time() const { return elapsed_time_; }
+
+  // Returns true if and only if the unit test passed (i.e. all test suites
+  // passed).
+  bool Passed() const { return !Failed(); }
+
+  // Returns true if and only if the unit test failed (i.e. some test suite
+  // failed or something outside of all tests failed).
+  bool Failed() const {
+    return failed_test_suite_count() > 0 || ad_hoc_test_result()->Failed();
+  }
+
+  // Gets the i-th test suite among all the test suites. i can range from 0 to
+  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
+  const TestSuite* GetTestSuite(int i) const {
+    const int index = GetElementOr(test_suite_indices_, i, -1);
+    return index < 0 ? nullptr : test_suites_[static_cast<size_t>(i)];
+  }
+
+  //  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  const TestCase* GetTestCase(int i) const { return GetTestSuite(i); }
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  // Gets the i-th test suite among all the test suites. i can range from 0 to
+  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
+  TestSuite* GetMutableSuiteCase(int i) {
+    const int index = GetElementOr(test_suite_indices_, i, -1);
+    return index < 0 ? nullptr : test_suites_[static_cast<size_t>(index)];
+  }
+
+  // Provides access to the event listener list.
+  TestEventListeners* listeners() { return &listeners_; }
+
+  // Returns the TestResult for the test that's currently running, or
+  // the TestResult for the ad hoc test if no test is running.
+  TestResult* current_test_result();
+
+  // Returns the TestResult for the ad hoc test.
+  const TestResult* ad_hoc_test_result() const { return &ad_hoc_test_result_; }
+
+  // Sets the OS stack trace getter.
+  //
+  // Does nothing if the input and the current OS stack trace getter
+  // are the same; otherwise, deletes the old getter and makes the
+  // input the current getter.
+  void set_os_stack_trace_getter(OsStackTraceGetterInterface* getter);
+
+  // Returns the current OS stack trace getter if it is not NULL;
+  // otherwise, creates an OsStackTraceGetter, makes it the current
+  // getter, and returns it.
+  OsStackTraceGetterInterface* os_stack_trace_getter();
+
+  // Returns the current OS stack trace as an std::string.
+  //
+  // The maximum number of stack frames to be included is specified by
+  // the gtest_stack_trace_depth flag.  The skip_count parameter
+  // specifies the number of top frames to be skipped, which doesn't
+  // count against the number of frames to be included.
+  //
+  // For example, if Foo() calls Bar(), which in turn calls
+  // CurrentOsStackTraceExceptTop(1), Foo() will be included in the
+  // trace but Bar() and CurrentOsStackTraceExceptTop() won't.
+  std::string CurrentOsStackTraceExceptTop(int skip_count) GTEST_NO_INLINE_;
+
+  // Finds and returns a TestSuite with the given name.  If one doesn't
+  // exist, creates one and returns it.
+  //
+  // Arguments:
+  //
+  //   test_suite_name: name of the test suite
+  //   type_param:      the name of the test's type parameter, or NULL if
+  //                    this is not a typed or a type-parameterized test.
+  //   set_up_tc:       pointer to the function that sets up the test suite
+  //   tear_down_tc:    pointer to the function that tears down the test suite
+  TestSuite* GetTestSuite(const char* test_suite_name, const char* type_param,
+                          internal::SetUpTestSuiteFunc set_up_tc,
+                          internal::TearDownTestSuiteFunc tear_down_tc);
+
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  TestCase* GetTestCase(const char* test_case_name, const char* type_param,
+                        internal::SetUpTestSuiteFunc set_up_tc,
+                        internal::TearDownTestSuiteFunc tear_down_tc) {
+    return GetTestSuite(test_case_name, type_param, set_up_tc, tear_down_tc);
+  }
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  // Adds a TestInfo to the unit test.
+  //
+  // Arguments:
+  //
+  //   set_up_tc:    pointer to the function that sets up the test suite
+  //   tear_down_tc: pointer to the function that tears down the test suite
+  //   test_info:    the TestInfo object
+  void AddTestInfo(internal::SetUpTestSuiteFunc set_up_tc,
+                   internal::TearDownTestSuiteFunc tear_down_tc,
+                   TestInfo* test_info) {
+#if GTEST_HAS_DEATH_TEST
+    // In order to support thread-safe death tests, we need to
+    // remember the original working directory when the test program
+    // was first invoked.  We cannot do this in RUN_ALL_TESTS(), as
+    // the user may have changed the current directory before calling
+    // RUN_ALL_TESTS().  Therefore we capture the current directory in
+    // AddTestInfo(), which is called to register a TEST or TEST_F
+    // before main() is reached.
+    if (original_working_dir_.IsEmpty()) {
+      original_working_dir_.Set(FilePath::GetCurrentDir());
+      GTEST_CHECK_(!original_working_dir_.IsEmpty())
+          << "Failed to get the current working directory.";
+    }
+#endif  // GTEST_HAS_DEATH_TEST
+
+    GetTestSuite(test_info->test_suite_name(), test_info->type_param(),
+                 set_up_tc, tear_down_tc)
+        ->AddTestInfo(test_info);
+  }
+
+  // Returns ParameterizedTestSuiteRegistry object used to keep track of
+  // value-parameterized tests and instantiate and register them.
+  internal::ParameterizedTestSuiteRegistry& parameterized_test_registry() {
+    return parameterized_test_registry_;
+  }
+
+  std::set<std::string>* ignored_parameterized_test_suites() {
+    return &ignored_parameterized_test_suites_;
+  }
+
+  // Returns TypeParameterizedTestSuiteRegistry object used to keep track of
+  // type-parameterized tests and instantiations of them.
+  internal::TypeParameterizedTestSuiteRegistry&
+  type_parameterized_test_registry() {
+    return type_parameterized_test_registry_;
+  }
+
+  // Sets the TestSuite object for the test that's currently running.
+  void set_current_test_suite(TestSuite* a_current_test_suite) {
+    current_test_suite_ = a_current_test_suite;
+  }
+
+  // Sets the TestInfo object for the test that's currently running.  If
+  // current_test_info is NULL, the assertion results will be stored in
+  // ad_hoc_test_result_.
+  void set_current_test_info(TestInfo* a_current_test_info) {
+    current_test_info_ = a_current_test_info;
+  }
+
+  // Registers all parameterized tests defined using TEST_P and
+  // INSTANTIATE_TEST_SUITE_P, creating regular tests for each test/parameter
+  // combination. This method can be called more then once; it has guards
+  // protecting from registering the tests more then once.  If
+  // value-parameterized tests are disabled, RegisterParameterizedTests is
+  // present but does nothing.
+  void RegisterParameterizedTests();
+
+  // Runs all tests in this UnitTest object, prints the result, and
+  // returns true if all tests are successful.  If any exception is
+  // thrown during a test, this test is considered to be failed, but
+  // the rest of the tests will still be run.
+  bool RunAllTests();
+
+  // Clears the results of all tests, except the ad hoc tests.
+  void ClearNonAdHocTestResult() {
+    ForEach(test_suites_, TestSuite::ClearTestSuiteResult);
+  }
+
+  // Clears the results of ad-hoc test assertions.
+  void ClearAdHocTestResult() {
+    ad_hoc_test_result_.Clear();
+  }
+
+  // Adds a TestProperty to the current TestResult object when invoked in a
+  // context of a test or a test suite, or to the global property set. If the
+  // result already contains a property with the same key, the value will be
+  // updated.
+  void RecordProperty(const TestProperty& test_property);
+
+  enum ReactionToSharding {
+    HONOR_SHARDING_PROTOCOL,
+    IGNORE_SHARDING_PROTOCOL
+  };
+
+  // Matches the full name of each test against the user-specified
+  // filter to decide whether the test should run, then records the
+  // result in each TestSuite and TestInfo object.
+  // If shard_tests == HONOR_SHARDING_PROTOCOL, further filters tests
+  // based on sharding variables in the environment.
+  // Returns the number of tests that should run.
+  int FilterTests(ReactionToSharding shard_tests);
+
+  // Prints the names of the tests matching the user-specified filter flag.
+  void ListTestsMatchingFilter();
+
+  const TestSuite* current_test_suite() const { return current_test_suite_; }
+  TestInfo* current_test_info() { return current_test_info_; }
+  const TestInfo* current_test_info() const { return current_test_info_; }
+
+  // Returns the vector of environments that need to be set-up/torn-down
+  // before/after the tests are run.
+  std::vector<Environment*>& environments() { return environments_; }
+
+  // Getters for the per-thread Google Test trace stack.
+  std::vector<TraceInfo>& gtest_trace_stack() {
+    return *(gtest_trace_stack_.pointer());
+  }
+  const std::vector<TraceInfo>& gtest_trace_stack() const {
+    return gtest_trace_stack_.get();
+  }
+
+#if GTEST_HAS_DEATH_TEST
+  void InitDeathTestSubprocessControlInfo() {
+    internal_run_death_test_flag_.reset(ParseInternalRunDeathTestFlag());
+  }
+  // Returns a pointer to the parsed --gtest_internal_run_death_test
+  // flag, or NULL if that flag was not specified.
+  // This information is useful only in a death test child process.
+  // Must not be called before a call to InitGoogleTest.
+  const InternalRunDeathTestFlag* internal_run_death_test_flag() const {
+    return internal_run_death_test_flag_.get();
+  }
+
+  // Returns a pointer to the current death test factory.
+  internal::DeathTestFactory* death_test_factory() {
+    return death_test_factory_.get();
+  }
+
+  void SuppressTestEventsIfInSubprocess();
+
+  friend class ReplaceDeathTestFactory;
+#endif  // GTEST_HAS_DEATH_TEST
+
+  // Initializes the event listener performing XML output as specified by
+  // UnitTestOptions. Must not be called before InitGoogleTest.
+  void ConfigureXmlOutput();
+
+#if GTEST_CAN_STREAM_RESULTS_
+  // Initializes the event listener for streaming test results to a socket.
+  // Must not be called before InitGoogleTest.
+  void ConfigureStreamingOutput();
+#endif
+
+  // Performs initialization dependent upon flag values obtained in
+  // ParseGoogleTestFlagsOnly.  Is called from InitGoogleTest after the call to
+  // ParseGoogleTestFlagsOnly.  In case a user neglects to call InitGoogleTest
+  // this function is also called from RunAllTests.  Since this function can be
+  // called more than once, it has to be idempotent.
+  void PostFlagParsingInit();
+
+  // Gets the random seed used at the start of the current test iteration.
+  int random_seed() const { return random_seed_; }
+
+  // Gets the random number generator.
+  internal::Random* random() { return &random_; }
+
+  // Shuffles all test suites, and the tests within each test suite,
+  // making sure that death tests are still run first.
+  void ShuffleTests();
+
+  // Restores the test suites and tests to their order before the first shuffle.
+  void UnshuffleTests();
+
+  // Returns the value of GTEST_FLAG(catch_exceptions) at the moment
+  // UnitTest::Run() starts.
+  bool catch_exceptions() const { return catch_exceptions_; }
+
+ private:
+  friend class ::testing::UnitTest;
+
+  // Used by UnitTest::Run() to capture the state of
+  // GTEST_FLAG(catch_exceptions) at the moment it starts.
+  void set_catch_exceptions(bool value) { catch_exceptions_ = value; }
+
+  // The UnitTest object that owns this implementation object.
+  UnitTest* const parent_;
+
+  // The working directory when the first TEST() or TEST_F() was
+  // executed.
+  internal::FilePath original_working_dir_;
+
+  // The default test part result reporters.
+  DefaultGlobalTestPartResultReporter default_global_test_part_result_reporter_;
+  DefaultPerThreadTestPartResultReporter
+      default_per_thread_test_part_result_reporter_;
+
+  // Points to (but doesn't own) the global test part result reporter.
+  TestPartResultReporterInterface* global_test_part_result_repoter_;
+
+  // Protects read and write access to global_test_part_result_reporter_.
+  internal::Mutex global_test_part_result_reporter_mutex_;
+
+  // Points to (but doesn't own) the per-thread test part result reporter.
+  internal::ThreadLocal<TestPartResultReporterInterface*>
+      per_thread_test_part_result_reporter_;
+
+  // The vector of environments that need to be set-up/torn-down
+  // before/after the tests are run.
+  std::vector<Environment*> environments_;
+
+  // The vector of TestSuites in their original order.  It owns the
+  // elements in the vector.
+  std::vector<TestSuite*> test_suites_;
+
+  // Provides a level of indirection for the test suite list to allow
+  // easy shuffling and restoring the test suite order.  The i-th
+  // element of this vector is the index of the i-th test suite in the
+  // shuffled order.
+  std::vector<int> test_suite_indices_;
+
+  // ParameterizedTestRegistry object used to register value-parameterized
+  // tests.
+  internal::ParameterizedTestSuiteRegistry parameterized_test_registry_;
+  internal::TypeParameterizedTestSuiteRegistry
+      type_parameterized_test_registry_;
+
+  // The set holding the name of parameterized
+  // test suites that may go uninstantiated.
+  std::set<std::string> ignored_parameterized_test_suites_;
+
+  // Indicates whether RegisterParameterizedTests() has been called already.
+  bool parameterized_tests_registered_;
+
+  // Index of the last death test suite registered.  Initially -1.
+  int last_death_test_suite_;
+
+  // This points to the TestSuite for the currently running test.  It
+  // changes as Google Test goes through one test suite after another.
+  // When no test is running, this is set to NULL and Google Test
+  // stores assertion results in ad_hoc_test_result_.  Initially NULL.
+  TestSuite* current_test_suite_;
+
+  // This points to the TestInfo for the currently running test.  It
+  // changes as Google Test goes through one test after another.  When
+  // no test is running, this is set to NULL and Google Test stores
+  // assertion results in ad_hoc_test_result_.  Initially NULL.
+  TestInfo* current_test_info_;
+
+  // Normally, a user only writes assertions inside a TEST or TEST_F,
+  // or inside a function called by a TEST or TEST_F.  Since Google
+  // Test keeps track of which test is current running, it can
+  // associate such an assertion with the test it belongs to.
+  //
+  // If an assertion is encountered when no TEST or TEST_F is running,
+  // Google Test attributes the assertion result to an imaginary "ad hoc"
+  // test, and records the result in ad_hoc_test_result_.
+  TestResult ad_hoc_test_result_;
+
+  // The list of event listeners that can be used to track events inside
+  // Google Test.
+  TestEventListeners listeners_;
+
+  // The OS stack trace getter.  Will be deleted when the UnitTest
+  // object is destructed.  By default, an OsStackTraceGetter is used,
+  // but the user can set this field to use a custom getter if that is
+  // desired.
+  OsStackTraceGetterInterface* os_stack_trace_getter_;
+
+  // True if and only if PostFlagParsingInit() has been called.
+  bool post_flag_parse_init_performed_;
+
+  // The random number seed used at the beginning of the test run.
+  int random_seed_;
+
+  // Our random number generator.
+  internal::Random random_;
+
+  // The time of the test program start, in ms from the start of the
+  // UNIX epoch.
+  TimeInMillis start_timestamp_;
+
+  // How long the test took to run, in milliseconds.
+  TimeInMillis elapsed_time_;
+
+#if GTEST_HAS_DEATH_TEST
+  // The decomposed components of the gtest_internal_run_death_test flag,
+  // parsed when RUN_ALL_TESTS is called.
+  std::unique_ptr<InternalRunDeathTestFlag> internal_run_death_test_flag_;
+  std::unique_ptr<internal::DeathTestFactory> death_test_factory_;
+#endif  // GTEST_HAS_DEATH_TEST
+
+  // A per-thread stack of traces created by the SCOPED_TRACE() macro.
+  internal::ThreadLocal<std::vector<TraceInfo> > gtest_trace_stack_;
+
+  // The value of GTEST_FLAG(catch_exceptions) at the moment RunAllTests()
+  // starts.
+  bool catch_exceptions_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(UnitTestImpl);
+};  // class UnitTestImpl
+
+// Convenience function for accessing the global UnitTest
+// implementation object.
+inline UnitTestImpl* GetUnitTestImpl() {
+  return UnitTest::GetInstance()->impl();
+}
+
+#if GTEST_USES_SIMPLE_RE
+
+// Internal helper functions for implementing the simple regular
+// expression matcher.
+GTEST_API_ bool IsInSet(char ch, const char* str);
+GTEST_API_ bool IsAsciiDigit(char ch);
+GTEST_API_ bool IsAsciiPunct(char ch);
+GTEST_API_ bool IsRepeat(char ch);
+GTEST_API_ bool IsAsciiWhiteSpace(char ch);
+GTEST_API_ bool IsAsciiWordChar(char ch);
+GTEST_API_ bool IsValidEscape(char ch);
+GTEST_API_ bool AtomMatchesChar(bool escaped, char pattern, char ch);
+GTEST_API_ bool ValidateRegex(const char* regex);
+GTEST_API_ bool MatchRegexAtHead(const char* regex, const char* str);
+GTEST_API_ bool MatchRepetitionAndRegexAtHead(
+    bool escaped, char ch, char repeat, const char* regex, const char* str);
+GTEST_API_ bool MatchRegexAnywhere(const char* regex, const char* str);
+
+#endif  // GTEST_USES_SIMPLE_RE
+
+// Parses the command line for Google Test flags, without initializing
+// other parts of Google Test.
+GTEST_API_ void ParseGoogleTestFlagsOnly(int* argc, char** argv);
+GTEST_API_ void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv);
+
+#if GTEST_HAS_DEATH_TEST
+
+// Returns the message describing the last system error, regardless of the
+// platform.
+GTEST_API_ std::string GetLastErrnoDescription();
+
+// Attempts to parse a string into a positive integer pointed to by the
+// number parameter.  Returns true if that is possible.
+// GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we can use
+// it here.
+template <typename Integer>
+bool ParseNaturalNumber(const ::std::string& str, Integer* number) {
+  // Fail fast if the given string does not begin with a digit;
+  // this bypasses strtoXXX's "optional leading whitespace and plus
+  // or minus sign" semantics, which are undesirable here.
+  if (str.empty() || !IsDigit(str[0])) {
+    return false;
+  }
+  errno = 0;
+
+  char* end;
+  // BiggestConvertible is the largest integer type that system-provided
+  // string-to-number conversion routines can return.
+  using BiggestConvertible = unsigned long long;  // NOLINT
+
+  const BiggestConvertible parsed = strtoull(str.c_str(), &end, 10);  // NOLINT
+  const bool parse_success = *end == '\0' && errno == 0;
+
+  GTEST_CHECK_(sizeof(Integer) <= sizeof(parsed));
+
+  const Integer result = static_cast<Integer>(parsed);
+  if (parse_success && static_cast<BiggestConvertible>(result) == parsed) {
+    *number = result;
+    return true;
+  }
+  return false;
+}
+#endif  // GTEST_HAS_DEATH_TEST
+
+// TestResult contains some private methods that should be hidden from
+// Google Test user but are required for testing. This class allow our tests
+// to access them.
+//
+// This class is supplied only for the purpose of testing Google Test's own
+// constructs. Do not use it in user tests, either directly or indirectly.
+class TestResultAccessor {
+ public:
+  static void RecordProperty(TestResult* test_result,
+                             const std::string& xml_element,
+                             const TestProperty& property) {
+    test_result->RecordProperty(xml_element, property);
+  }
+
+  static void ClearTestPartResults(TestResult* test_result) {
+    test_result->ClearTestPartResults();
+  }
+
+  static const std::vector<testing::TestPartResult>& test_part_results(
+      const TestResult& test_result) {
+    return test_result.test_part_results();
+  }
+};
+
+#if GTEST_CAN_STREAM_RESULTS_
+
+// Streams test results to the given port on the given host machine.
+class StreamingListener : public EmptyTestEventListener {
+ public:
+  // Abstract base class for writing strings to a socket.
+  class AbstractSocketWriter {
+   public:
+    virtual ~AbstractSocketWriter() {}
+
+    // Sends a string to the socket.
+    virtual void Send(const std::string& message) = 0;
+
+    // Closes the socket.
+    virtual void CloseConnection() {}
+
+    // Sends a string and a newline to the socket.
+    void SendLn(const std::string& message) { Send(message + "\n"); }
+  };
+
+  // Concrete class for actually writing strings to a socket.
+  class SocketWriter : public AbstractSocketWriter {
+   public:
+    SocketWriter(const std::string& host, const std::string& port)
+        : sockfd_(-1), host_name_(host), port_num_(port) {
+      MakeConnection();
+    }
+
+    ~SocketWriter() override {
+      if (sockfd_ != -1)
+        CloseConnection();
+    }
+
+    // Sends a string to the socket.
+    void Send(const std::string& message) override {
+      GTEST_CHECK_(sockfd_ != -1)
+          << "Send() can be called only when there is a connection.";
+
+      const auto len = static_cast<size_t>(message.length());
+      if (write(sockfd_, message.c_str(), len) != static_cast<ssize_t>(len)) {
+        GTEST_LOG_(WARNING)
+            << "stream_result_to: failed to stream to "
+            << host_name_ << ":" << port_num_;
+      }
+    }
+
+   private:
+    // Creates a client socket and connects to the server.
+    void MakeConnection();
+
+    // Closes the socket.
+    void CloseConnection() override {
+      GTEST_CHECK_(sockfd_ != -1)
+          << "CloseConnection() can be called only when there is a connection.";
+
+      close(sockfd_);
+      sockfd_ = -1;
+    }
+
+    int sockfd_;  // socket file descriptor
+    const std::string host_name_;
+    const std::string port_num_;
+
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(SocketWriter);
+  };  // class SocketWriter
+
+  // Escapes '=', '&', '%', and '\n' characters in str as "%xx".
+  static std::string UrlEncode(const char* str);
+
+  StreamingListener(const std::string& host, const std::string& port)
+      : socket_writer_(new SocketWriter(host, port)) {
+    Start();
+  }
+
+  explicit StreamingListener(AbstractSocketWriter* socket_writer)
+      : socket_writer_(socket_writer) { Start(); }
+
+  void OnTestProgramStart(const UnitTest& /* unit_test */) override {
+    SendLn("event=TestProgramStart");
+  }
+
+  void OnTestProgramEnd(const UnitTest& unit_test) override {
+    // Note that Google Test current only report elapsed time for each
+    // test iteration, not for the entire test program.
+    SendLn("event=TestProgramEnd&passed=" + FormatBool(unit_test.Passed()));
+
+    // Notify the streaming server to stop.
+    socket_writer_->CloseConnection();
+  }
+
+  void OnTestIterationStart(const UnitTest& /* unit_test */,
+                            int iteration) override {
+    SendLn("event=TestIterationStart&iteration=" +
+           StreamableToString(iteration));
+  }
+
+  void OnTestIterationEnd(const UnitTest& unit_test,
+                          int /* iteration */) override {
+    SendLn("event=TestIterationEnd&passed=" +
+           FormatBool(unit_test.Passed()) + "&elapsed_time=" +
+           StreamableToString(unit_test.elapsed_time()) + "ms");
+  }
+
+  // Note that "event=TestCaseStart" is a wire format and has to remain
+  // "case" for compatibility
+  void OnTestCaseStart(const TestCase& test_case) override {
+    SendLn(std::string("event=TestCaseStart&name=") + test_case.name());
+  }
+
+  // Note that "event=TestCaseEnd" is a wire format and has to remain
+  // "case" for compatibility
+  void OnTestCaseEnd(const TestCase& test_case) override {
+    SendLn("event=TestCaseEnd&passed=" + FormatBool(test_case.Passed()) +
+           "&elapsed_time=" + StreamableToString(test_case.elapsed_time()) +
+           "ms");
+  }
+
+  void OnTestStart(const TestInfo& test_info) override {
+    SendLn(std::string("event=TestStart&name=") + test_info.name());
+  }
+
+  void OnTestEnd(const TestInfo& test_info) override {
+    SendLn("event=TestEnd&passed=" +
+           FormatBool((test_info.result())->Passed()) +
+           "&elapsed_time=" +
+           StreamableToString((test_info.result())->elapsed_time()) + "ms");
+  }
+
+  void OnTestPartResult(const TestPartResult& test_part_result) override {
+    const char* file_name = test_part_result.file_name();
+    if (file_name == nullptr) file_name = "";
+    SendLn("event=TestPartResult&file=" + UrlEncode(file_name) +
+           "&line=" + StreamableToString(test_part_result.line_number()) +
+           "&message=" + UrlEncode(test_part_result.message()));
+  }
+
+ private:
+  // Sends the given message and a newline to the socket.
+  void SendLn(const std::string& message) { socket_writer_->SendLn(message); }
+
+  // Called at the start of streaming to notify the receiver what
+  // protocol we are using.
+  void Start() { SendLn("gtest_streaming_protocol_version=1.0"); }
+
+  std::string FormatBool(bool value) { return value ? "1" : "0"; }
+
+  const std::unique_ptr<AbstractSocketWriter> socket_writer_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(StreamingListener);
+};  // class StreamingListener
+
+#endif  // GTEST_CAN_STREAM_RESULTS_
+
+}  // namespace internal
+}  // namespace testing
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
+
+#endif  // GOOGLETEST_SRC_GTEST_INTERNAL_INL_H_
+
+#if GTEST_OS_WINDOWS
+# define vsnprintf _vsnprintf
+#endif  // GTEST_OS_WINDOWS
+
+#if GTEST_OS_MAC
+#ifndef GTEST_OS_IOS
+#include <crt_externs.h>
+#endif
+#endif
+
+#if GTEST_HAS_ABSL
+#include "absl/debugging/failure_signal_handler.h"
+#include "absl/debugging/stacktrace.h"
+#include "absl/debugging/symbolize.h"
+#include "absl/strings/str_cat.h"
+#endif  // GTEST_HAS_ABSL
+
+namespace testing {
+
+using internal::CountIf;
+using internal::ForEach;
+using internal::GetElementOr;
+using internal::Shuffle;
+
+// Constants.
+
+// A test whose test suite name or test name matches this filter is
+// disabled and not run.
+static const char kDisableTestFilter[] = "DISABLED_*:*/DISABLED_*";
+
+// A test suite whose name matches this filter is considered a death
+// test suite and will be run before test suites whose name doesn't
+// match this filter.
+static const char kDeathTestSuiteFilter[] = "*DeathTest:*DeathTest/*";
+
+// A test filter that matches everything.
+static const char kUniversalFilter[] = "*";
+
+// The default output format.
+static const char kDefaultOutputFormat[] = "xml";
+// The default output file.
+static const char kDefaultOutputFile[] = "test_detail";
+
+// The environment variable name for the test shard index.
+static const char kTestShardIndex[] = "GTEST_SHARD_INDEX";
+// The environment variable name for the total number of test shards.
+static const char kTestTotalShards[] = "GTEST_TOTAL_SHARDS";
+// The environment variable name for the test shard status file.
+static const char kTestShardStatusFile[] = "GTEST_SHARD_STATUS_FILE";
+
+namespace internal {
+
+// The text used in failure messages to indicate the start of the
+// stack trace.
+const char kStackTraceMarker[] = "\nStack trace:\n";
+
+// g_help_flag is true if and only if the --help flag or an equivalent form
+// is specified on the command line.
+bool g_help_flag = false;
+
+// Utilty function to Open File for Writing
+static FILE* OpenFileForWriting(const std::string& output_file) {
+  FILE* fileout = nullptr;
+  FilePath output_file_path(output_file);
+  FilePath output_dir(output_file_path.RemoveFileName());
+
+  if (output_dir.CreateDirectoriesRecursively()) {
+    fileout = posix::FOpen(output_file.c_str(), "w");
+  }
+  if (fileout == nullptr) {
+    GTEST_LOG_(FATAL) << "Unable to open file \"" << output_file << "\"";
+  }
+  return fileout;
+}
+
+}  // namespace internal
+
+// Bazel passes in the argument to '--test_filter' via the TESTBRIDGE_TEST_ONLY
+// environment variable.
+static const char* GetDefaultFilter() {
+  const char* const testbridge_test_only =
+      internal::posix::GetEnv("TESTBRIDGE_TEST_ONLY");
+  if (testbridge_test_only != nullptr) {
+    return testbridge_test_only;
+  }
+  return kUniversalFilter;
+}
+
+// Bazel passes in the argument to '--test_runner_fail_fast' via the
+// TESTBRIDGE_TEST_RUNNER_FAIL_FAST environment variable.
+static bool GetDefaultFailFast() {
+  const char* const testbridge_test_runner_fail_fast =
+      internal::posix::GetEnv("TESTBRIDGE_TEST_RUNNER_FAIL_FAST");
+  if (testbridge_test_runner_fail_fast != nullptr) {
+    return strcmp(testbridge_test_runner_fail_fast, "1") == 0;
+  }
+  return false;
+}
+
+GTEST_DEFINE_bool_(
+    fail_fast, internal::BoolFromGTestEnv("fail_fast", GetDefaultFailFast()),
+    "True if and only if a test failure should stop further test execution.");
+
+GTEST_DEFINE_bool_(
+    also_run_disabled_tests,
+    internal::BoolFromGTestEnv("also_run_disabled_tests", false),
+    "Run disabled tests too, in addition to the tests normally being run.");
+
+GTEST_DEFINE_bool_(
+    break_on_failure, internal::BoolFromGTestEnv("break_on_failure", false),
+    "True if and only if a failed assertion should be a debugger "
+    "break-point.");
+
+GTEST_DEFINE_bool_(catch_exceptions,
+                   internal::BoolFromGTestEnv("catch_exceptions", true),
+                   "True if and only if " GTEST_NAME_
+                   " should catch exceptions and treat them as test failures.");
+
+GTEST_DEFINE_string_(
+    color,
+    internal::StringFromGTestEnv("color", "auto"),
+    "Whether to use colors in the output.  Valid values: yes, no, "
+    "and auto.  'auto' means to use colors if the output is "
+    "being sent to a terminal and the TERM environment variable "
+    "is set to a terminal type that supports colors.");
+
+GTEST_DEFINE_string_(
+    filter,
+    internal::StringFromGTestEnv("filter", GetDefaultFilter()),
+    "A colon-separated list of glob (not regex) patterns "
+    "for filtering the tests to run, optionally followed by a "
+    "'-' and a : separated list of negative patterns (tests to "
+    "exclude).  A test is run if it matches one of the positive "
+    "patterns and does not match any of the negative patterns.");
+
+GTEST_DEFINE_bool_(
+    install_failure_signal_handler,
+    internal::BoolFromGTestEnv("install_failure_signal_handler", false),
+    "If true and supported on the current platform, " GTEST_NAME_ " should "
+    "install a signal handler that dumps debugging information when fatal "
+    "signals are raised.");
+
+GTEST_DEFINE_bool_(list_tests, false,
+                   "List all tests without running them.");
+
+// The net priority order after flag processing is thus:
+//   --gtest_output command line flag
+//   GTEST_OUTPUT environment variable
+//   XML_OUTPUT_FILE environment variable
+//   ''
+GTEST_DEFINE_string_(
+    output,
+    internal::StringFromGTestEnv("output",
+      internal::OutputFlagAlsoCheckEnvVar().c_str()),
+    "A format (defaults to \"xml\" but can be specified to be \"json\"), "
+    "optionally followed by a colon and an output file name or directory. "
+    "A directory is indicated by a trailing pathname separator. "
+    "Examples: \"xml:filename.xml\", \"xml::directoryname/\". "
+    "If a directory is specified, output files will be created "
+    "within that directory, with file-names based on the test "
+    "executable's name and, if necessary, made unique by adding "
+    "digits.");
+
+GTEST_DEFINE_bool_(
+    brief, internal::BoolFromGTestEnv("brief", false),
+    "True if only test failures should be displayed in text output.");
+
+GTEST_DEFINE_bool_(print_time, internal::BoolFromGTestEnv("print_time", true),
+                   "True if and only if " GTEST_NAME_
+                   " should display elapsed time in text output.");
+
+GTEST_DEFINE_bool_(print_utf8, internal::BoolFromGTestEnv("print_utf8", true),
+                   "True if and only if " GTEST_NAME_
+                   " prints UTF8 characters as text.");
+
+GTEST_DEFINE_int32_(
+    random_seed,
+    internal::Int32FromGTestEnv("random_seed", 0),
+    "Random number seed to use when shuffling test orders.  Must be in range "
+    "[1, 99999], or 0 to use a seed based on the current time.");
+
+GTEST_DEFINE_int32_(
+    repeat,
+    internal::Int32FromGTestEnv("repeat", 1),
+    "How many times to repeat each test.  Specify a negative number "
+    "for repeating forever.  Useful for shaking out flaky tests.");
+
+GTEST_DEFINE_bool_(show_internal_stack_frames, false,
+                   "True if and only if " GTEST_NAME_
+                   " should include internal stack frames when "
+                   "printing test failure stack traces.");
+
+GTEST_DEFINE_bool_(shuffle, internal::BoolFromGTestEnv("shuffle", false),
+                   "True if and only if " GTEST_NAME_
+                   " should randomize tests' order on every run.");
+
+GTEST_DEFINE_int32_(
+    stack_trace_depth,
+    internal::Int32FromGTestEnv("stack_trace_depth", kMaxStackTraceDepth),
+    "The maximum number of stack frames to print when an "
+    "assertion fails.  The valid range is 0 through 100, inclusive.");
+
+GTEST_DEFINE_string_(
+    stream_result_to,
+    internal::StringFromGTestEnv("stream_result_to", ""),
+    "This flag specifies the host name and the port number on which to stream "
+    "test results. Example: \"localhost:555\". The flag is effective only on "
+    "Linux.");
+
+GTEST_DEFINE_bool_(
+    throw_on_failure,
+    internal::BoolFromGTestEnv("throw_on_failure", false),
+    "When this flag is specified, a failed assertion will throw an exception "
+    "if exceptions are enabled or exit the program with a non-zero code "
+    "otherwise. For use with an external test framework.");
+
+#if GTEST_USE_OWN_FLAGFILE_FLAG_
+GTEST_DEFINE_string_(
+    flagfile,
+    internal::StringFromGTestEnv("flagfile", ""),
+    "This flag specifies the flagfile to read command-line flags from.");
+#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
+
+namespace internal {
+
+// Generates a random number from [0, range), using a Linear
+// Congruential Generator (LCG).  Crashes if 'range' is 0 or greater
+// than kMaxRange.
+uint32_t Random::Generate(uint32_t range) {
+  // These constants are the same as are used in glibc's rand(3).
+  // Use wider types than necessary to prevent unsigned overflow diagnostics.
+  state_ = static_cast<uint32_t>(1103515245ULL*state_ + 12345U) % kMaxRange;
+
+  GTEST_CHECK_(range > 0)
+      << "Cannot generate a number in the range [0, 0).";
+  GTEST_CHECK_(range <= kMaxRange)
+      << "Generation of a number in [0, " << range << ") was requested, "
+      << "but this can only generate numbers in [0, " << kMaxRange << ").";
+
+  // Converting via modulus introduces a bit of downward bias, but
+  // it's simple, and a linear congruential generator isn't too good
+  // to begin with.
+  return state_ % range;
+}
+
+// GTestIsInitialized() returns true if and only if the user has initialized
+// Google Test.  Useful for catching the user mistake of not initializing
+// Google Test before calling RUN_ALL_TESTS().
+static bool GTestIsInitialized() { return GetArgvs().size() > 0; }
+
+// Iterates over a vector of TestSuites, keeping a running sum of the
+// results of calling a given int-returning method on each.
+// Returns the sum.
+static int SumOverTestSuiteList(const std::vector<TestSuite*>& case_list,
+                                int (TestSuite::*method)() const) {
+  int sum = 0;
+  for (size_t i = 0; i < case_list.size(); i++) {
+    sum += (case_list[i]->*method)();
+  }
+  return sum;
+}
+
+// Returns true if and only if the test suite passed.
+static bool TestSuitePassed(const TestSuite* test_suite) {
+  return test_suite->should_run() && test_suite->Passed();
+}
+
+// Returns true if and only if the test suite failed.
+static bool TestSuiteFailed(const TestSuite* test_suite) {
+  return test_suite->should_run() && test_suite->Failed();
+}
+
+// Returns true if and only if test_suite contains at least one test that
+// should run.
+static bool ShouldRunTestSuite(const TestSuite* test_suite) {
+  return test_suite->should_run();
+}
+
+// AssertHelper constructor.
+AssertHelper::AssertHelper(TestPartResult::Type type,
+                           const char* file,
+                           int line,
+                           const char* message)
+    : data_(new AssertHelperData(type, file, line, message)) {
+}
+
+AssertHelper::~AssertHelper() {
+  delete data_;
+}
+
+// Message assignment, for assertion streaming support.
+void AssertHelper::operator=(const Message& message) const {
+  UnitTest::GetInstance()->
+    AddTestPartResult(data_->type, data_->file, data_->line,
+                      AppendUserMessage(data_->message, message),
+                      UnitTest::GetInstance()->impl()
+                      ->CurrentOsStackTraceExceptTop(1)
+                      // Skips the stack frame for this function itself.
+                      );  // NOLINT
+}
+
+namespace {
+
+// When TEST_P is found without a matching INSTANTIATE_TEST_SUITE_P
+// to creates test cases for it, a syntetic test case is
+// inserted to report ether an error or a log message.
+//
+// This configuration bit will likely be removed at some point.
+constexpr bool kErrorOnUninstantiatedParameterizedTest = true;
+constexpr bool kErrorOnUninstantiatedTypeParameterizedTest = true;
+
+// A test that fails at a given file/line location with a given message.
+class FailureTest : public Test {
+ public:
+  explicit FailureTest(const CodeLocation& loc, std::string error_message,
+                       bool as_error)
+      : loc_(loc),
+        error_message_(std::move(error_message)),
+        as_error_(as_error) {}
+
+  void TestBody() override {
+    if (as_error_) {
+      AssertHelper(TestPartResult::kNonFatalFailure, loc_.file.c_str(),
+                   loc_.line, "") = Message() << error_message_;
+    } else {
+      std::cout << error_message_ << std::endl;
+    }
+  }
+
+ private:
+  const CodeLocation loc_;
+  const std::string error_message_;
+  const bool as_error_;
+};
+
+
+}  // namespace
+
+std::set<std::string>* GetIgnoredParameterizedTestSuites() {
+  return UnitTest::GetInstance()->impl()->ignored_parameterized_test_suites();
+}
+
+// Add a given test_suit to the list of them allow to go un-instantiated.
+MarkAsIgnored::MarkAsIgnored(const char* test_suite) {
+  GetIgnoredParameterizedTestSuites()->insert(test_suite);
+}
+
+// If this parameterized test suite has no instantiations (and that
+// has not been marked as okay), emit a test case reporting that.
+void InsertSyntheticTestCase(const std::string& name, CodeLocation location,
+                             bool has_test_p) {
+  const auto& ignored = *GetIgnoredParameterizedTestSuites();
+  if (ignored.find(name) != ignored.end()) return;
+
+  const char kMissingInstantiation[] =  //
+      " is defined via TEST_P, but never instantiated. None of the test cases "
+      "will run. Either no INSTANTIATE_TEST_SUITE_P is provided or the only "
+      "ones provided expand to nothing."
+      "\n\n"
+      "Ideally, TEST_P definitions should only ever be included as part of "
+      "binaries that intend to use them. (As opposed to, for example, being "
+      "placed in a library that may be linked in to get other utilities.)";
+
+  const char kMissingTestCase[] =  //
+      " is instantiated via INSTANTIATE_TEST_SUITE_P, but no tests are "
+      "defined via TEST_P . No test cases will run."
+      "\n\n"
+      "Ideally, INSTANTIATE_TEST_SUITE_P should only ever be invoked from "
+      "code that always depend on code that provides TEST_P. Failing to do "
+      "so is often an indication of dead code, e.g. the last TEST_P was "
+      "removed but the rest got left behind.";
+
+  std::string message =
+      "Parameterized test suite " + name +
+      (has_test_p ? kMissingInstantiation : kMissingTestCase) +
+      "\n\n"
+      "To suppress this error for this test suite, insert the following line "
+      "(in a non-header) in the namespace it is defined in:"
+      "\n\n"
+      "GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(" + name + ");";
+
+  std::string full_name = "UninstantiatedParameterizedTestSuite<" + name + ">";
+  RegisterTest(  //
+      "GoogleTestVerification", full_name.c_str(),
+      nullptr,  // No type parameter.
+      nullptr,  // No value parameter.
+      location.file.c_str(), location.line, [message, location] {
+        return new FailureTest(location, message,
+                               kErrorOnUninstantiatedParameterizedTest);
+      });
+}
+
+void RegisterTypeParameterizedTestSuite(const char* test_suite_name,
+                                        CodeLocation code_location) {
+  GetUnitTestImpl()->type_parameterized_test_registry().RegisterTestSuite(
+      test_suite_name, code_location);
+}
+
+void RegisterTypeParameterizedTestSuiteInstantiation(const char* case_name) {
+  GetUnitTestImpl()
+      ->type_parameterized_test_registry()
+      .RegisterInstantiation(case_name);
+}
+
+void TypeParameterizedTestSuiteRegistry::RegisterTestSuite(
+    const char* test_suite_name, CodeLocation code_location) {
+  suites_.emplace(std::string(test_suite_name),
+                 TypeParameterizedTestSuiteInfo(code_location));
+}
+
+void TypeParameterizedTestSuiteRegistry::RegisterInstantiation(
+        const char* test_suite_name) {
+  auto it = suites_.find(std::string(test_suite_name));
+  if (it != suites_.end()) {
+    it->second.instantiated = true;
+  } else {
+    GTEST_LOG_(ERROR) << "Unknown type parameterized test suit '"
+                      << test_suite_name << "'";
+  }
+}
+
+void TypeParameterizedTestSuiteRegistry::CheckForInstantiations() {
+  const auto& ignored = *GetIgnoredParameterizedTestSuites();
+  for (const auto& testcase : suites_) {
+    if (testcase.second.instantiated) continue;
+    if (ignored.find(testcase.first) != ignored.end()) continue;
+
+    std::string message =
+        "Type parameterized test suite " + testcase.first +
+        " is defined via REGISTER_TYPED_TEST_SUITE_P, but never instantiated "
+        "via INSTANTIATE_TYPED_TEST_SUITE_P. None of the test cases will run."
+        "\n\n"
+        "Ideally, TYPED_TEST_P definitions should only ever be included as "
+        "part of binaries that intend to use them. (As opposed to, for "
+        "example, being placed in a library that may be linked in to get other "
+        "utilities.)"
+        "\n\n"
+        "To suppress this error for this test suite, insert the following line "
+        "(in a non-header) in the namespace it is defined in:"
+        "\n\n"
+        "GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(" +
+        testcase.first + ");";
+
+    std::string full_name =
+        "UninstantiatedTypeParameterizedTestSuite<" + testcase.first + ">";
+    RegisterTest(  //
+        "GoogleTestVerification", full_name.c_str(),
+        nullptr,  // No type parameter.
+        nullptr,  // No value parameter.
+        testcase.second.code_location.file.c_str(),
+        testcase.second.code_location.line, [message, testcase] {
+          return new FailureTest(testcase.second.code_location, message,
+                                 kErrorOnUninstantiatedTypeParameterizedTest);
+        });
+  }
+}
+
+// A copy of all command line arguments.  Set by InitGoogleTest().
+static ::std::vector<std::string> g_argvs;
+
+::std::vector<std::string> GetArgvs() {
+#if defined(GTEST_CUSTOM_GET_ARGVS_)
+  // GTEST_CUSTOM_GET_ARGVS_() may return a container of std::string or
+  // ::string. This code converts it to the appropriate type.
+  const auto& custom = GTEST_CUSTOM_GET_ARGVS_();
+  return ::std::vector<std::string>(custom.begin(), custom.end());
+#else   // defined(GTEST_CUSTOM_GET_ARGVS_)
+  return g_argvs;
+#endif  // defined(GTEST_CUSTOM_GET_ARGVS_)
+}
+
+// Returns the current application's name, removing directory path if that
+// is present.
+FilePath GetCurrentExecutableName() {
+  FilePath result;
+
+#if GTEST_OS_WINDOWS || GTEST_OS_OS2
+  result.Set(FilePath(GetArgvs()[0]).RemoveExtension("exe"));
+#else
+  result.Set(FilePath(GetArgvs()[0]));
+#endif  // GTEST_OS_WINDOWS
+
+  return result.RemoveDirectoryName();
+}
+
+// Functions for processing the gtest_output flag.
+
+// Returns the output format, or "" for normal printed output.
+std::string UnitTestOptions::GetOutputFormat() {
+  const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
+  const char* const colon = strchr(gtest_output_flag, ':');
+  return (colon == nullptr)
+             ? std::string(gtest_output_flag)
+             : std::string(gtest_output_flag,
+                           static_cast<size_t>(colon - gtest_output_flag));
+}
+
+// Returns the name of the requested output file, or the default if none
+// was explicitly specified.
+std::string UnitTestOptions::GetAbsolutePathToOutputFile() {
+  const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
+
+  std::string format = GetOutputFormat();
+  if (format.empty())
+    format = std::string(kDefaultOutputFormat);
+
+  const char* const colon = strchr(gtest_output_flag, ':');
+  if (colon == nullptr)
+    return internal::FilePath::MakeFileName(
+        internal::FilePath(
+            UnitTest::GetInstance()->original_working_dir()),
+        internal::FilePath(kDefaultOutputFile), 0,
+        format.c_str()).string();
+
+  internal::FilePath output_name(colon + 1);
+  if (!output_name.IsAbsolutePath())
+    output_name = internal::FilePath::ConcatPaths(
+        internal::FilePath(UnitTest::GetInstance()->original_working_dir()),
+        internal::FilePath(colon + 1));
+
+  if (!output_name.IsDirectory())
+    return output_name.string();
+
+  internal::FilePath result(internal::FilePath::GenerateUniqueFileName(
+      output_name, internal::GetCurrentExecutableName(),
+      GetOutputFormat().c_str()));
+  return result.string();
+}
+
+// Returns true if and only if the wildcard pattern matches the string. Each
+// pattern consists of regular characters, single-character wildcards (?), and
+// multi-character wildcards (*).
+//
+// This function implements a linear-time string globbing algorithm based on
+// https://research.swtch.com/glob.
+static bool PatternMatchesString(const std::string& name_str,
+                                 const char* pattern, const char* pattern_end) {
+  const char* name = name_str.c_str();
+  const char* const name_begin = name;
+  const char* const name_end = name + name_str.size();
+
+  const char* pattern_next = pattern;
+  const char* name_next = name;
+
+  while (pattern < pattern_end || name < name_end) {
+    if (pattern < pattern_end) {
+      switch (*pattern) {
+        default:  // Match an ordinary character.
+          if (name < name_end && *name == *pattern) {
+            ++pattern;
+            ++name;
+            continue;
+          }
+          break;
+        case '?':  // Match any single character.
+          if (name < name_end) {
+            ++pattern;
+            ++name;
+            continue;
+          }
+          break;
+        case '*':
+          // Match zero or more characters. Start by skipping over the wildcard
+          // and matching zero characters from name. If that fails, restart and
+          // match one more character than the last attempt.
+          pattern_next = pattern;
+          name_next = name + 1;
+          ++pattern;
+          continue;
+      }
+    }
+    // Failed to match a character. Restart if possible.
+    if (name_begin < name_next && name_next <= name_end) {
+      pattern = pattern_next;
+      name = name_next;
+      continue;
+    }
+    return false;
+  }
+  return true;
+}
+
+bool UnitTestOptions::MatchesFilter(const std::string& name_str,
+                                    const char* filter) {
+  // The filter is a list of patterns separated by colons (:).
+  const char* pattern = filter;
+  while (true) {
+    // Find the bounds of this pattern.
+    const char* const next_sep = strchr(pattern, ':');
+    const char* const pattern_end =
+        next_sep != nullptr ? next_sep : pattern + strlen(pattern);
+
+    // Check if this pattern matches name_str.
+    if (PatternMatchesString(name_str, pattern, pattern_end)) {
+      return true;
+    }
+
+    // Give up on this pattern. However, if we found a pattern separator (:),
+    // advance to the next pattern (skipping over the separator) and restart.
+    if (next_sep == nullptr) {
+      return false;
+    }
+    pattern = next_sep + 1;
+  }
+  return true;
+}
+
+// Returns true if and only if the user-specified filter matches the test
+// suite name and the test name.
+bool UnitTestOptions::FilterMatchesTest(const std::string& test_suite_name,
+                                        const std::string& test_name) {
+  const std::string& full_name = test_suite_name + "." + test_name.c_str();
+
+  // Split --gtest_filter at '-', if there is one, to separate into
+  // positive filter and negative filter portions
+  const char* const p = GTEST_FLAG(filter).c_str();
+  const char* const dash = strchr(p, '-');
+  std::string positive;
+  std::string negative;
+  if (dash == nullptr) {
+    positive = GTEST_FLAG(filter).c_str();  // Whole string is a positive filter
+    negative = "";
+  } else {
+    positive = std::string(p, dash);   // Everything up to the dash
+    negative = std::string(dash + 1);  // Everything after the dash
+    if (positive.empty()) {
+      // Treat '-test1' as the same as '*-test1'
+      positive = kUniversalFilter;
+    }
+  }
+
+  // A filter is a colon-separated list of patterns.  It matches a
+  // test if any pattern in it matches the test.
+  return (MatchesFilter(full_name, positive.c_str()) &&
+          !MatchesFilter(full_name, negative.c_str()));
+}
+
+#if GTEST_HAS_SEH
+// Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
+// given SEH exception, or EXCEPTION_CONTINUE_SEARCH otherwise.
+// This function is useful as an __except condition.
+int UnitTestOptions::GTestShouldProcessSEH(DWORD exception_code) {
+  // Google Test should handle a SEH exception if:
+  //   1. the user wants it to, AND
+  //   2. this is not a breakpoint exception, AND
+  //   3. this is not a C++ exception (VC++ implements them via SEH,
+  //      apparently).
+  //
+  // SEH exception code for C++ exceptions.
+  // (see http://support.microsoft.com/kb/185294 for more information).
+  const DWORD kCxxExceptionCode = 0xe06d7363;
+
+  bool should_handle = true;
+
+  if (!GTEST_FLAG(catch_exceptions))
+    should_handle = false;
+  else if (exception_code == EXCEPTION_BREAKPOINT)
+    should_handle = false;
+  else if (exception_code == kCxxExceptionCode)
+    should_handle = false;
+
+  return should_handle ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH;
+}
+#endif  // GTEST_HAS_SEH
+
+}  // namespace internal
+
+// The c'tor sets this object as the test part result reporter used by
+// Google Test.  The 'result' parameter specifies where to report the
+// results. Intercepts only failures from the current thread.
+ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
+    TestPartResultArray* result)
+    : intercept_mode_(INTERCEPT_ONLY_CURRENT_THREAD),
+      result_(result) {
+  Init();
+}
+
+// The c'tor sets this object as the test part result reporter used by
+// Google Test.  The 'result' parameter specifies where to report the
+// results.
+ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
+    InterceptMode intercept_mode, TestPartResultArray* result)
+    : intercept_mode_(intercept_mode),
+      result_(result) {
+  Init();
+}
+
+void ScopedFakeTestPartResultReporter::Init() {
+  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
+  if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
+    old_reporter_ = impl->GetGlobalTestPartResultReporter();
+    impl->SetGlobalTestPartResultReporter(this);
+  } else {
+    old_reporter_ = impl->GetTestPartResultReporterForCurrentThread();
+    impl->SetTestPartResultReporterForCurrentThread(this);
+  }
+}
+
+// The d'tor restores the test part result reporter used by Google Test
+// before.
+ScopedFakeTestPartResultReporter::~ScopedFakeTestPartResultReporter() {
+  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
+  if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
+    impl->SetGlobalTestPartResultReporter(old_reporter_);
+  } else {
+    impl->SetTestPartResultReporterForCurrentThread(old_reporter_);
+  }
+}
+
+// Increments the test part result count and remembers the result.
+// This method is from the TestPartResultReporterInterface interface.
+void ScopedFakeTestPartResultReporter::ReportTestPartResult(
+    const TestPartResult& result) {
+  result_->Append(result);
+}
+
+namespace internal {
+
+// Returns the type ID of ::testing::Test.  We should always call this
+// instead of GetTypeId< ::testing::Test>() to get the type ID of
+// testing::Test.  This is to work around a suspected linker bug when
+// using Google Test as a framework on Mac OS X.  The bug causes
+// GetTypeId< ::testing::Test>() to return different values depending
+// on whether the call is from the Google Test framework itself or
+// from user test code.  GetTestTypeId() is guaranteed to always
+// return the same value, as it always calls GetTypeId<>() from the
+// gtest.cc, which is within the Google Test framework.
+TypeId GetTestTypeId() {
+  return GetTypeId<Test>();
+}
+
+// The value of GetTestTypeId() as seen from within the Google Test
+// library.  This is solely for testing GetTestTypeId().
+extern const TypeId kTestTypeIdInGoogleTest = GetTestTypeId();
+
+// This predicate-formatter checks that 'results' contains a test part
+// failure of the given type and that the failure message contains the
+// given substring.
+static AssertionResult HasOneFailure(const char* /* results_expr */,
+                                     const char* /* type_expr */,
+                                     const char* /* substr_expr */,
+                                     const TestPartResultArray& results,
+                                     TestPartResult::Type type,
+                                     const std::string& substr) {
+  const std::string expected(type == TestPartResult::kFatalFailure ?
+                        "1 fatal failure" :
+                        "1 non-fatal failure");
+  Message msg;
+  if (results.size() != 1) {
+    msg << "Expected: " << expected << "\n"
+        << "  Actual: " << results.size() << " failures";
+    for (int i = 0; i < results.size(); i++) {
+      msg << "\n" << results.GetTestPartResult(i);
+    }
+    return AssertionFailure() << msg;
+  }
+
+  const TestPartResult& r = results.GetTestPartResult(0);
+  if (r.type() != type) {
+    return AssertionFailure() << "Expected: " << expected << "\n"
+                              << "  Actual:\n"
+                              << r;
+  }
+
+  if (strstr(r.message(), substr.c_str()) == nullptr) {
+    return AssertionFailure() << "Expected: " << expected << " containing \""
+                              << substr << "\"\n"
+                              << "  Actual:\n"
+                              << r;
+  }
+
+  return AssertionSuccess();
+}
+
+// The constructor of SingleFailureChecker remembers where to look up
+// test part results, what type of failure we expect, and what
+// substring the failure message should contain.
+SingleFailureChecker::SingleFailureChecker(const TestPartResultArray* results,
+                                           TestPartResult::Type type,
+                                           const std::string& substr)
+    : results_(results), type_(type), substr_(substr) {}
+
+// The destructor of SingleFailureChecker verifies that the given
+// TestPartResultArray contains exactly one failure that has the given
+// type and contains the given substring.  If that's not the case, a
+// non-fatal failure will be generated.
+SingleFailureChecker::~SingleFailureChecker() {
+  EXPECT_PRED_FORMAT3(HasOneFailure, *results_, type_, substr_);
+}
+
+DefaultGlobalTestPartResultReporter::DefaultGlobalTestPartResultReporter(
+    UnitTestImpl* unit_test) : unit_test_(unit_test) {}
+
+void DefaultGlobalTestPartResultReporter::ReportTestPartResult(
+    const TestPartResult& result) {
+  unit_test_->current_test_result()->AddTestPartResult(result);
+  unit_test_->listeners()->repeater()->OnTestPartResult(result);
+}
+
+DefaultPerThreadTestPartResultReporter::DefaultPerThreadTestPartResultReporter(
+    UnitTestImpl* unit_test) : unit_test_(unit_test) {}
+
+void DefaultPerThreadTestPartResultReporter::ReportTestPartResult(
+    const TestPartResult& result) {
+  unit_test_->GetGlobalTestPartResultReporter()->ReportTestPartResult(result);
+}
+
+// Returns the global test part result reporter.
+TestPartResultReporterInterface*
+UnitTestImpl::GetGlobalTestPartResultReporter() {
+  internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
+  return global_test_part_result_repoter_;
+}
+
+// Sets the global test part result reporter.
+void UnitTestImpl::SetGlobalTestPartResultReporter(
+    TestPartResultReporterInterface* reporter) {
+  internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
+  global_test_part_result_repoter_ = reporter;
+}
+
+// Returns the test part result reporter for the current thread.
+TestPartResultReporterInterface*
+UnitTestImpl::GetTestPartResultReporterForCurrentThread() {
+  return per_thread_test_part_result_reporter_.get();
+}
+
+// Sets the test part result reporter for the current thread.
+void UnitTestImpl::SetTestPartResultReporterForCurrentThread(
+    TestPartResultReporterInterface* reporter) {
+  per_thread_test_part_result_reporter_.set(reporter);
+}
+
+// Gets the number of successful test suites.
+int UnitTestImpl::successful_test_suite_count() const {
+  return CountIf(test_suites_, TestSuitePassed);
+}
+
+// Gets the number of failed test suites.
+int UnitTestImpl::failed_test_suite_count() const {
+  return CountIf(test_suites_, TestSuiteFailed);
+}
+
+// Gets the number of all test suites.
+int UnitTestImpl::total_test_suite_count() const {
+  return static_cast<int>(test_suites_.size());
+}
+
+// Gets the number of all test suites that contain at least one test
+// that should run.
+int UnitTestImpl::test_suite_to_run_count() const {
+  return CountIf(test_suites_, ShouldRunTestSuite);
+}
+
+// Gets the number of successful tests.
+int UnitTestImpl::successful_test_count() const {
+  return SumOverTestSuiteList(test_suites_, &TestSuite::successful_test_count);
+}
+
+// Gets the number of skipped tests.
+int UnitTestImpl::skipped_test_count() const {
+  return SumOverTestSuiteList(test_suites_, &TestSuite::skipped_test_count);
+}
+
+// Gets the number of failed tests.
+int UnitTestImpl::failed_test_count() const {
+  return SumOverTestSuiteList(test_suites_, &TestSuite::failed_test_count);
+}
+
+// Gets the number of disabled tests that will be reported in the XML report.
+int UnitTestImpl::reportable_disabled_test_count() const {
+  return SumOverTestSuiteList(test_suites_,
+                              &TestSuite::reportable_disabled_test_count);
+}
+
+// Gets the number of disabled tests.
+int UnitTestImpl::disabled_test_count() const {
+  return SumOverTestSuiteList(test_suites_, &TestSuite::disabled_test_count);
+}
+
+// Gets the number of tests to be printed in the XML report.
+int UnitTestImpl::reportable_test_count() const {
+  return SumOverTestSuiteList(test_suites_, &TestSuite::reportable_test_count);
+}
+
+// Gets the number of all tests.
+int UnitTestImpl::total_test_count() const {
+  return SumOverTestSuiteList(test_suites_, &TestSuite::total_test_count);
+}
+
+// Gets the number of tests that should run.
+int UnitTestImpl::test_to_run_count() const {
+  return SumOverTestSuiteList(test_suites_, &TestSuite::test_to_run_count);
+}
+
+// Returns the current OS stack trace as an std::string.
+//
+// The maximum number of stack frames to be included is specified by
+// the gtest_stack_trace_depth flag.  The skip_count parameter
+// specifies the number of top frames to be skipped, which doesn't
+// count against the number of frames to be included.
+//
+// For example, if Foo() calls Bar(), which in turn calls
+// CurrentOsStackTraceExceptTop(1), Foo() will be included in the
+// trace but Bar() and CurrentOsStackTraceExceptTop() won't.
+std::string UnitTestImpl::CurrentOsStackTraceExceptTop(int skip_count) {
+  return os_stack_trace_getter()->CurrentStackTrace(
+      static_cast<int>(GTEST_FLAG(stack_trace_depth)),
+      skip_count + 1
+      // Skips the user-specified number of frames plus this function
+      // itself.
+      );  // NOLINT
+}
+
+// A helper class for measuring elapsed times.
+class Timer {
+ public:
+  Timer() : start_(std::chrono::steady_clock::now()) {}
+
+  // Return time elapsed in milliseconds since the timer was created.
+  TimeInMillis Elapsed() {
+    return std::chrono::duration_cast<std::chrono::milliseconds>(
+               std::chrono::steady_clock::now() - start_)
+        .count();
+  }
+
+ private:
+  std::chrono::steady_clock::time_point start_;
+};
+
+// Returns a timestamp as milliseconds since the epoch. Note this time may jump
+// around subject to adjustments by the system, to measure elapsed time use
+// Timer instead.
+TimeInMillis GetTimeInMillis() {
+  return std::chrono::duration_cast<std::chrono::milliseconds>(
+             std::chrono::system_clock::now() -
+             std::chrono::system_clock::from_time_t(0))
+      .count();
+}
+
+// Utilities
+
+// class String.
+
+#if GTEST_OS_WINDOWS_MOBILE
+// Creates a UTF-16 wide string from the given ANSI string, allocating
+// memory using new. The caller is responsible for deleting the return
+// value using delete[]. Returns the wide string, or NULL if the
+// input is NULL.
+LPCWSTR String::AnsiToUtf16(const char* ansi) {
+  if (!ansi) return nullptr;
+  const int length = strlen(ansi);
+  const int unicode_length =
+      MultiByteToWideChar(CP_ACP, 0, ansi, length, nullptr, 0);
+  WCHAR* unicode = new WCHAR[unicode_length + 1];
+  MultiByteToWideChar(CP_ACP, 0, ansi, length,
+                      unicode, unicode_length);
+  unicode[unicode_length] = 0;
+  return unicode;
+}
+
+// Creates an ANSI string from the given wide string, allocating
+// memory using new. The caller is responsible for deleting the return
+// value using delete[]. Returns the ANSI string, or NULL if the
+// input is NULL.
+const char* String::Utf16ToAnsi(LPCWSTR utf16_str)  {
+  if (!utf16_str) return nullptr;
+  const int ansi_length = WideCharToMultiByte(CP_ACP, 0, utf16_str, -1, nullptr,
+                                              0, nullptr, nullptr);
+  char* ansi = new char[ansi_length + 1];
+  WideCharToMultiByte(CP_ACP, 0, utf16_str, -1, ansi, ansi_length, nullptr,
+                      nullptr);
+  ansi[ansi_length] = 0;
+  return ansi;
+}
+
+#endif  // GTEST_OS_WINDOWS_MOBILE
+
+// Compares two C strings.  Returns true if and only if they have the same
+// content.
+//
+// Unlike strcmp(), this function can handle NULL argument(s).  A NULL
+// C string is considered different to any non-NULL C string,
+// including the empty string.
+bool String::CStringEquals(const char * lhs, const char * rhs) {
+  if (lhs == nullptr) return rhs == nullptr;
+
+  if (rhs == nullptr) return false;
+
+  return strcmp(lhs, rhs) == 0;
+}
+
+#if GTEST_HAS_STD_WSTRING
+
+// Converts an array of wide chars to a narrow string using the UTF-8
+// encoding, and streams the result to the given Message object.
+static void StreamWideCharsToMessage(const wchar_t* wstr, size_t length,
+                                     Message* msg) {
+  for (size_t i = 0; i != length; ) {  // NOLINT
+    if (wstr[i] != L'\0') {
+      *msg << WideStringToUtf8(wstr + i, static_cast<int>(length - i));
+      while (i != length && wstr[i] != L'\0')
+        i++;
+    } else {
+      *msg << '\0';
+      i++;
+    }
+  }
+}
+
+#endif  // GTEST_HAS_STD_WSTRING
+
+void SplitString(const ::std::string& str, char delimiter,
+                 ::std::vector< ::std::string>* dest) {
+  ::std::vector< ::std::string> parsed;
+  ::std::string::size_type pos = 0;
+  while (::testing::internal::AlwaysTrue()) {
+    const ::std::string::size_type colon = str.find(delimiter, pos);
+    if (colon == ::std::string::npos) {
+      parsed.push_back(str.substr(pos));
+      break;
+    } else {
+      parsed.push_back(str.substr(pos, colon - pos));
+      pos = colon + 1;
+    }
+  }
+  dest->swap(parsed);
+}
+
+}  // namespace internal
+
+// Constructs an empty Message.
+// We allocate the stringstream separately because otherwise each use of
+// ASSERT/EXPECT in a procedure adds over 200 bytes to the procedure's
+// stack frame leading to huge stack frames in some cases; gcc does not reuse
+// the stack space.
+Message::Message() : ss_(new ::std::stringstream) {
+  // By default, we want there to be enough precision when printing
+  // a double to a Message.
+  *ss_ << std::setprecision(std::numeric_limits<double>::digits10 + 2);
+}
+
+// These two overloads allow streaming a wide C string to a Message
+// using the UTF-8 encoding.
+Message& Message::operator <<(const wchar_t* wide_c_str) {
+  return *this << internal::String::ShowWideCString(wide_c_str);
+}
+Message& Message::operator <<(wchar_t* wide_c_str) {
+  return *this << internal::String::ShowWideCString(wide_c_str);
+}
+
+#if GTEST_HAS_STD_WSTRING
+// Converts the given wide string to a narrow string using the UTF-8
+// encoding, and streams the result to this Message object.
+Message& Message::operator <<(const ::std::wstring& wstr) {
+  internal::StreamWideCharsToMessage(wstr.c_str(), wstr.length(), this);
+  return *this;
+}
+#endif  // GTEST_HAS_STD_WSTRING
+
+// Gets the text streamed to this object so far as an std::string.
+// Each '\0' character in the buffer is replaced with "\\0".
+std::string Message::GetString() const {
+  return internal::StringStreamToString(ss_.get());
+}
+
+// AssertionResult constructors.
+// Used in EXPECT_TRUE/FALSE(assertion_result).
+AssertionResult::AssertionResult(const AssertionResult& other)
+    : success_(other.success_),
+      message_(other.message_.get() != nullptr
+                   ? new ::std::string(*other.message_)
+                   : static_cast< ::std::string*>(nullptr)) {}
+
+// Swaps two AssertionResults.
+void AssertionResult::swap(AssertionResult& other) {
+  using std::swap;
+  swap(success_, other.success_);
+  swap(message_, other.message_);
+}
+
+// Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
+AssertionResult AssertionResult::operator!() const {
+  AssertionResult negation(!success_);
+  if (message_.get() != nullptr) negation << *message_;
+  return negation;
+}
+
+// Makes a successful assertion result.
+AssertionResult AssertionSuccess() {
+  return AssertionResult(true);
+}
+
+// Makes a failed assertion result.
+AssertionResult AssertionFailure() {
+  return AssertionResult(false);
+}
+
+// Makes a failed assertion result with the given failure message.
+// Deprecated; use AssertionFailure() << message.
+AssertionResult AssertionFailure(const Message& message) {
+  return AssertionFailure() << message;
+}
+
+namespace internal {
+
+namespace edit_distance {
+std::vector<EditType> CalculateOptimalEdits(const std::vector<size_t>& left,
+                                            const std::vector<size_t>& right) {
+  std::vector<std::vector<double> > costs(
+      left.size() + 1, std::vector<double>(right.size() + 1));
+  std::vector<std::vector<EditType> > best_move(
+      left.size() + 1, std::vector<EditType>(right.size() + 1));
+
+  // Populate for empty right.
+  for (size_t l_i = 0; l_i < costs.size(); ++l_i) {
+    costs[l_i][0] = static_cast<double>(l_i);
+    best_move[l_i][0] = kRemove;
+  }
+  // Populate for empty left.
+  for (size_t r_i = 1; r_i < costs[0].size(); ++r_i) {
+    costs[0][r_i] = static_cast<double>(r_i);
+    best_move[0][r_i] = kAdd;
+  }
+
+  for (size_t l_i = 0; l_i < left.size(); ++l_i) {
+    for (size_t r_i = 0; r_i < right.size(); ++r_i) {
+      if (left[l_i] == right[r_i]) {
+        // Found a match. Consume it.
+        costs[l_i + 1][r_i + 1] = costs[l_i][r_i];
+        best_move[l_i + 1][r_i + 1] = kMatch;
+        continue;
+      }
+
+      const double add = costs[l_i + 1][r_i];
+      const double remove = costs[l_i][r_i + 1];
+      const double replace = costs[l_i][r_i];
+      if (add < remove && add < replace) {
+        costs[l_i + 1][r_i + 1] = add + 1;
+        best_move[l_i + 1][r_i + 1] = kAdd;
+      } else if (remove < add && remove < replace) {
+        costs[l_i + 1][r_i + 1] = remove + 1;
+        best_move[l_i + 1][r_i + 1] = kRemove;
+      } else {
+        // We make replace a little more expensive than add/remove to lower
+        // their priority.
+        costs[l_i + 1][r_i + 1] = replace + 1.00001;
+        best_move[l_i + 1][r_i + 1] = kReplace;
+      }
+    }
+  }
+
+  // Reconstruct the best path. We do it in reverse order.
+  std::vector<EditType> best_path;
+  for (size_t l_i = left.size(), r_i = right.size(); l_i > 0 || r_i > 0;) {
+    EditType move = best_move[l_i][r_i];
+    best_path.push_back(move);
+    l_i -= move != kAdd;
+    r_i -= move != kRemove;
+  }
+  std::reverse(best_path.begin(), best_path.end());
+  return best_path;
+}
+
+namespace {
+
+// Helper class to convert string into ids with deduplication.
+class InternalStrings {
+ public:
+  size_t GetId(const std::string& str) {
+    IdMap::iterator it = ids_.find(str);
+    if (it != ids_.end()) return it->second;
+    size_t id = ids_.size();
+    return ids_[str] = id;
+  }
+
+ private:
+  typedef std::map<std::string, size_t> IdMap;
+  IdMap ids_;
+};
+
+}  // namespace
+
+std::vector<EditType> CalculateOptimalEdits(
+    const std::vector<std::string>& left,
+    const std::vector<std::string>& right) {
+  std::vector<size_t> left_ids, right_ids;
+  {
+    InternalStrings intern_table;
+    for (size_t i = 0; i < left.size(); ++i) {
+      left_ids.push_back(intern_table.GetId(left[i]));
+    }
+    for (size_t i = 0; i < right.size(); ++i) {
+      right_ids.push_back(intern_table.GetId(right[i]));
+    }
+  }
+  return CalculateOptimalEdits(left_ids, right_ids);
+}
+
+namespace {
+
+// Helper class that holds the state for one hunk and prints it out to the
+// stream.
+// It reorders adds/removes when possible to group all removes before all
+// adds. It also adds the hunk header before printint into the stream.
+class Hunk {
+ public:
+  Hunk(size_t left_start, size_t right_start)
+      : left_start_(left_start),
+        right_start_(right_start),
+        adds_(),
+        removes_(),
+        common_() {}
+
+  void PushLine(char edit, const char* line) {
+    switch (edit) {
+      case ' ':
+        ++common_;
+        FlushEdits();
+        hunk_.push_back(std::make_pair(' ', line));
+        break;
+      case '-':
+        ++removes_;
+        hunk_removes_.push_back(std::make_pair('-', line));
+        break;
+      case '+':
+        ++adds_;
+        hunk_adds_.push_back(std::make_pair('+', line));
+        break;
+    }
+  }
+
+  void PrintTo(std::ostream* os) {
+    PrintHeader(os);
+    FlushEdits();
+    for (std::list<std::pair<char, const char*> >::const_iterator it =
+             hunk_.begin();
+         it != hunk_.end(); ++it) {
+      *os << it->first << it->second << "\n";
+    }
+  }
+
+  bool has_edits() const { return adds_ || removes_; }
+
+ private:
+  void FlushEdits() {
+    hunk_.splice(hunk_.end(), hunk_removes_);
+    hunk_.splice(hunk_.end(), hunk_adds_);
+  }
+
+  // Print a unified diff header for one hunk.
+  // The format is
+  //   "@@ -<left_start>,<left_length> +<right_start>,<right_length> @@"
+  // where the left/right parts are omitted if unnecessary.
+  void PrintHeader(std::ostream* ss) const {
+    *ss << "@@ ";
+    if (removes_) {
+      *ss << "-" << left_start_ << "," << (removes_ + common_);
+    }
+    if (removes_ && adds_) {
+      *ss << " ";
+    }
+    if (adds_) {
+      *ss << "+" << right_start_ << "," << (adds_ + common_);
+    }
+    *ss << " @@\n";
+  }
+
+  size_t left_start_, right_start_;
+  size_t adds_, removes_, common_;
+  std::list<std::pair<char, const char*> > hunk_, hunk_adds_, hunk_removes_;
+};
+
+}  // namespace
+
+// Create a list of diff hunks in Unified diff format.
+// Each hunk has a header generated by PrintHeader above plus a body with
+// lines prefixed with ' ' for no change, '-' for deletion and '+' for
+// addition.
+// 'context' represents the desired unchanged prefix/suffix around the diff.
+// If two hunks are close enough that their contexts overlap, then they are
+// joined into one hunk.
+std::string CreateUnifiedDiff(const std::vector<std::string>& left,
+                              const std::vector<std::string>& right,
+                              size_t context) {
+  const std::vector<EditType> edits = CalculateOptimalEdits(left, right);
+
+  size_t l_i = 0, r_i = 0, edit_i = 0;
+  std::stringstream ss;
+  while (edit_i < edits.size()) {
+    // Find first edit.
+    while (edit_i < edits.size() && edits[edit_i] == kMatch) {
+      ++l_i;
+      ++r_i;
+      ++edit_i;
+    }
+
+    // Find the first line to include in the hunk.
+    const size_t prefix_context = std::min(l_i, context);
+    Hunk hunk(l_i - prefix_context + 1, r_i - prefix_context + 1);
+    for (size_t i = prefix_context; i > 0; --i) {
+      hunk.PushLine(' ', left[l_i - i].c_str());
+    }
+
+    // Iterate the edits until we found enough suffix for the hunk or the input
+    // is over.
+    size_t n_suffix = 0;
+    for (; edit_i < edits.size(); ++edit_i) {
+      if (n_suffix >= context) {
+        // Continue only if the next hunk is very close.
+        auto it = edits.begin() + static_cast<int>(edit_i);
+        while (it != edits.end() && *it == kMatch) ++it;
+        if (it == edits.end() ||
+            static_cast<size_t>(it - edits.begin()) - edit_i >= context) {
+          // There is no next edit or it is too far away.
+          break;
+        }
+      }
+
+      EditType edit = edits[edit_i];
+      // Reset count when a non match is found.
+      n_suffix = edit == kMatch ? n_suffix + 1 : 0;
+
+      if (edit == kMatch || edit == kRemove || edit == kReplace) {
+        hunk.PushLine(edit == kMatch ? ' ' : '-', left[l_i].c_str());
+      }
+      if (edit == kAdd || edit == kReplace) {
+        hunk.PushLine('+', right[r_i].c_str());
+      }
+
+      // Advance indices, depending on edit type.
+      l_i += edit != kAdd;
+      r_i += edit != kRemove;
+    }
+
+    if (!hunk.has_edits()) {
+      // We are done. We don't want this hunk.
+      break;
+    }
+
+    hunk.PrintTo(&ss);
+  }
+  return ss.str();
+}
+
+}  // namespace edit_distance
+
+namespace {
+
+// The string representation of the values received in EqFailure() are already
+// escaped. Split them on escaped '\n' boundaries. Leave all other escaped
+// characters the same.
+std::vector<std::string> SplitEscapedString(const std::string& str) {
+  std::vector<std::string> lines;
+  size_t start = 0, end = str.size();
+  if (end > 2 && str[0] == '"' && str[end - 1] == '"') {
+    ++start;
+    --end;
+  }
+  bool escaped = false;
+  for (size_t i = start; i + 1 < end; ++i) {
+    if (escaped) {
+      escaped = false;
+      if (str[i] == 'n') {
+        lines.push_back(str.substr(start, i - start - 1));
+        start = i + 1;
+      }
+    } else {
+      escaped = str[i] == '\\';
+    }
+  }
+  lines.push_back(str.substr(start, end - start));
+  return lines;
+}
+
+}  // namespace
+
+// Constructs and returns the message for an equality assertion
+// (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
+//
+// The first four parameters are the expressions used in the assertion
+// and their values, as strings.  For example, for ASSERT_EQ(foo, bar)
+// where foo is 5 and bar is 6, we have:
+//
+//   lhs_expression: "foo"
+//   rhs_expression: "bar"
+//   lhs_value:      "5"
+//   rhs_value:      "6"
+//
+// The ignoring_case parameter is true if and only if the assertion is a
+// *_STRCASEEQ*.  When it's true, the string "Ignoring case" will
+// be inserted into the message.
+AssertionResult EqFailure(const char* lhs_expression,
+                          const char* rhs_expression,
+                          const std::string& lhs_value,
+                          const std::string& rhs_value,
+                          bool ignoring_case) {
+  Message msg;
+  msg << "Expected equality of these values:";
+  msg << "\n  " << lhs_expression;
+  if (lhs_value != lhs_expression) {
+    msg << "\n    Which is: " << lhs_value;
+  }
+  msg << "\n  " << rhs_expression;
+  if (rhs_value != rhs_expression) {
+    msg << "\n    Which is: " << rhs_value;
+  }
+
+  if (ignoring_case) {
+    msg << "\nIgnoring case";
+  }
+
+  if (!lhs_value.empty() && !rhs_value.empty()) {
+    const std::vector<std::string> lhs_lines =
+        SplitEscapedString(lhs_value);
+    const std::vector<std::string> rhs_lines =
+        SplitEscapedString(rhs_value);
+    if (lhs_lines.size() > 1 || rhs_lines.size() > 1) {
+      msg << "\nWith diff:\n"
+          << edit_distance::CreateUnifiedDiff(lhs_lines, rhs_lines);
+    }
+  }
+
+  return AssertionFailure() << msg;
+}
+
+// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
+std::string GetBoolAssertionFailureMessage(
+    const AssertionResult& assertion_result,
+    const char* expression_text,
+    const char* actual_predicate_value,
+    const char* expected_predicate_value) {
+  const char* actual_message = assertion_result.message();
+  Message msg;
+  msg << "Value of: " << expression_text
+      << "\n  Actual: " << actual_predicate_value;
+  if (actual_message[0] != '\0')
+    msg << " (" << actual_message << ")";
+  msg << "\nExpected: " << expected_predicate_value;
+  return msg.GetString();
+}
+
+// Helper function for implementing ASSERT_NEAR.
+AssertionResult DoubleNearPredFormat(const char* expr1,
+                                     const char* expr2,
+                                     const char* abs_error_expr,
+                                     double val1,
+                                     double val2,
+                                     double abs_error) {
+  const double diff = fabs(val1 - val2);
+  if (diff <= abs_error) return AssertionSuccess();
+
+  // Find the value which is closest to zero.
+  const double min_abs = std::min(fabs(val1), fabs(val2));
+  // Find the distance to the next double from that value.
+  const double epsilon =
+      nextafter(min_abs, std::numeric_limits<double>::infinity()) - min_abs;
+  // Detect the case where abs_error is so small that EXPECT_NEAR is
+  // effectively the same as EXPECT_EQUAL, and give an informative error
+  // message so that the situation can be more easily understood without
+  // requiring exotic floating-point knowledge.
+  // Don't do an epsilon check if abs_error is zero because that implies
+  // that an equality check was actually intended.
+  if (!(std::isnan)(val1) && !(std::isnan)(val2) && abs_error > 0 &&
+      abs_error < epsilon) {
+    return AssertionFailure()
+           << "The difference between " << expr1 << " and " << expr2 << " is "
+           << diff << ", where\n"
+           << expr1 << " evaluates to " << val1 << ",\n"
+           << expr2 << " evaluates to " << val2 << ".\nThe abs_error parameter "
+           << abs_error_expr << " evaluates to " << abs_error
+           << " which is smaller than the minimum distance between doubles for "
+              "numbers of this magnitude which is "
+           << epsilon
+           << ", thus making this EXPECT_NEAR check equivalent to "
+              "EXPECT_EQUAL. Consider using EXPECT_DOUBLE_EQ instead.";
+  }
+  return AssertionFailure()
+      << "The difference between " << expr1 << " and " << expr2
+      << " is " << diff << ", which exceeds " << abs_error_expr << ", where\n"
+      << expr1 << " evaluates to " << val1 << ",\n"
+      << expr2 << " evaluates to " << val2 << ", and\n"
+      << abs_error_expr << " evaluates to " << abs_error << ".";
+}
+
+
+// Helper template for implementing FloatLE() and DoubleLE().
+template <typename RawType>
+AssertionResult FloatingPointLE(const char* expr1,
+                                const char* expr2,
+                                RawType val1,
+                                RawType val2) {
+  // Returns success if val1 is less than val2,
+  if (val1 < val2) {
+    return AssertionSuccess();
+  }
+
+  // or if val1 is almost equal to val2.
+  const FloatingPoint<RawType> lhs(val1), rhs(val2);
+  if (lhs.AlmostEquals(rhs)) {
+    return AssertionSuccess();
+  }
+
+  // Note that the above two checks will both fail if either val1 or
+  // val2 is NaN, as the IEEE floating-point standard requires that
+  // any predicate involving a NaN must return false.
+
+  ::std::stringstream val1_ss;
+  val1_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
+          << val1;
+
+  ::std::stringstream val2_ss;
+  val2_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
+          << val2;
+
+  return AssertionFailure()
+      << "Expected: (" << expr1 << ") <= (" << expr2 << ")\n"
+      << "  Actual: " << StringStreamToString(&val1_ss) << " vs "
+      << StringStreamToString(&val2_ss);
+}
+
+}  // namespace internal
+
+// Asserts that val1 is less than, or almost equal to, val2.  Fails
+// otherwise.  In particular, it fails if either val1 or val2 is NaN.
+AssertionResult FloatLE(const char* expr1, const char* expr2,
+                        float val1, float val2) {
+  return internal::FloatingPointLE<float>(expr1, expr2, val1, val2);
+}
+
+// Asserts that val1 is less than, or almost equal to, val2.  Fails
+// otherwise.  In particular, it fails if either val1 or val2 is NaN.
+AssertionResult DoubleLE(const char* expr1, const char* expr2,
+                         double val1, double val2) {
+  return internal::FloatingPointLE<double>(expr1, expr2, val1, val2);
+}
+
+namespace internal {
+
+// The helper function for {ASSERT|EXPECT}_STREQ.
+AssertionResult CmpHelperSTREQ(const char* lhs_expression,
+                               const char* rhs_expression,
+                               const char* lhs,
+                               const char* rhs) {
+  if (String::CStringEquals(lhs, rhs)) {
+    return AssertionSuccess();
+  }
+
+  return EqFailure(lhs_expression,
+                   rhs_expression,
+                   PrintToString(lhs),
+                   PrintToString(rhs),
+                   false);
+}
+
+// The helper function for {ASSERT|EXPECT}_STRCASEEQ.
+AssertionResult CmpHelperSTRCASEEQ(const char* lhs_expression,
+                                   const char* rhs_expression,
+                                   const char* lhs,
+                                   const char* rhs) {
+  if (String::CaseInsensitiveCStringEquals(lhs, rhs)) {
+    return AssertionSuccess();
+  }
+
+  return EqFailure(lhs_expression,
+                   rhs_expression,
+                   PrintToString(lhs),
+                   PrintToString(rhs),
+                   true);
+}
+
+// The helper function for {ASSERT|EXPECT}_STRNE.
+AssertionResult CmpHelperSTRNE(const char* s1_expression,
+                               const char* s2_expression,
+                               const char* s1,
+                               const char* s2) {
+  if (!String::CStringEquals(s1, s2)) {
+    return AssertionSuccess();
+  } else {
+    return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
+                              << s2_expression << "), actual: \""
+                              << s1 << "\" vs \"" << s2 << "\"";
+  }
+}
+
+// The helper function for {ASSERT|EXPECT}_STRCASENE.
+AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
+                                   const char* s2_expression,
+                                   const char* s1,
+                                   const char* s2) {
+  if (!String::CaseInsensitiveCStringEquals(s1, s2)) {
+    return AssertionSuccess();
+  } else {
+    return AssertionFailure()
+        << "Expected: (" << s1_expression << ") != ("
+        << s2_expression << ") (ignoring case), actual: \""
+        << s1 << "\" vs \"" << s2 << "\"";
+  }
+}
+
+}  // namespace internal
+
+namespace {
+
+// Helper functions for implementing IsSubString() and IsNotSubstring().
+
+// This group of overloaded functions return true if and only if needle
+// is a substring of haystack.  NULL is considered a substring of
+// itself only.
+
+bool IsSubstringPred(const char* needle, const char* haystack) {
+  if (needle == nullptr || haystack == nullptr) return needle == haystack;
+
+  return strstr(haystack, needle) != nullptr;
+}
+
+bool IsSubstringPred(const wchar_t* needle, const wchar_t* haystack) {
+  if (needle == nullptr || haystack == nullptr) return needle == haystack;
+
+  return wcsstr(haystack, needle) != nullptr;
+}
+
+// StringType here can be either ::std::string or ::std::wstring.
+template <typename StringType>
+bool IsSubstringPred(const StringType& needle,
+                     const StringType& haystack) {
+  return haystack.find(needle) != StringType::npos;
+}
+
+// This function implements either IsSubstring() or IsNotSubstring(),
+// depending on the value of the expected_to_be_substring parameter.
+// StringType here can be const char*, const wchar_t*, ::std::string,
+// or ::std::wstring.
+template <typename StringType>
+AssertionResult IsSubstringImpl(
+    bool expected_to_be_substring,
+    const char* needle_expr, const char* haystack_expr,
+    const StringType& needle, const StringType& haystack) {
+  if (IsSubstringPred(needle, haystack) == expected_to_be_substring)
+    return AssertionSuccess();
+
+  const bool is_wide_string = sizeof(needle[0]) > 1;
+  const char* const begin_string_quote = is_wide_string ? "L\"" : "\"";
+  return AssertionFailure()
+      << "Value of: " << needle_expr << "\n"
+      << "  Actual: " << begin_string_quote << needle << "\"\n"
+      << "Expected: " << (expected_to_be_substring ? "" : "not ")
+      << "a substring of " << haystack_expr << "\n"
+      << "Which is: " << begin_string_quote << haystack << "\"";
+}
+
+}  // namespace
+
+// IsSubstring() and IsNotSubstring() check whether needle is a
+// substring of haystack (NULL is considered a substring of itself
+// only), and return an appropriate error message when they fail.
+
+AssertionResult IsSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const char* needle, const char* haystack) {
+  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
+}
+
+AssertionResult IsSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const wchar_t* needle, const wchar_t* haystack) {
+  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
+}
+
+AssertionResult IsNotSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const char* needle, const char* haystack) {
+  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
+}
+
+AssertionResult IsNotSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const wchar_t* needle, const wchar_t* haystack) {
+  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
+}
+
+AssertionResult IsSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const ::std::string& needle, const ::std::string& haystack) {
+  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
+}
+
+AssertionResult IsNotSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const ::std::string& needle, const ::std::string& haystack) {
+  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
+}
+
+#if GTEST_HAS_STD_WSTRING
+AssertionResult IsSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const ::std::wstring& needle, const ::std::wstring& haystack) {
+  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
+}
+
+AssertionResult IsNotSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const ::std::wstring& needle, const ::std::wstring& haystack) {
+  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
+}
+#endif  // GTEST_HAS_STD_WSTRING
+
+namespace internal {
+
+#if GTEST_OS_WINDOWS
+
+namespace {
+
+// Helper function for IsHRESULT{SuccessFailure} predicates
+AssertionResult HRESULTFailureHelper(const char* expr,
+                                     const char* expected,
+                                     long hr) {  // NOLINT
+# if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_TV_TITLE
+
+  // Windows CE doesn't support FormatMessage.
+  const char error_text[] = "";
+
+# else
+
+  // Looks up the human-readable system message for the HRESULT code
+  // and since we're not passing any params to FormatMessage, we don't
+  // want inserts expanded.
+  const DWORD kFlags = FORMAT_MESSAGE_FROM_SYSTEM |
+                       FORMAT_MESSAGE_IGNORE_INSERTS;
+  const DWORD kBufSize = 4096;
+  // Gets the system's human readable message string for this HRESULT.
+  char error_text[kBufSize] = { '\0' };
+  DWORD message_length = ::FormatMessageA(kFlags,
+                                          0,   // no source, we're asking system
+                                          static_cast<DWORD>(hr),  // the error
+                                          0,   // no line width restrictions
+                                          error_text,  // output buffer
+                                          kBufSize,    // buf size
+                                          nullptr);  // no arguments for inserts
+  // Trims tailing white space (FormatMessage leaves a trailing CR-LF)
+  for (; message_length && IsSpace(error_text[message_length - 1]);
+          --message_length) {
+    error_text[message_length - 1] = '\0';
+  }
+
+# endif  // GTEST_OS_WINDOWS_MOBILE
+
+  const std::string error_hex("0x" + String::FormatHexInt(hr));
+  return ::testing::AssertionFailure()
+      << "Expected: " << expr << " " << expected << ".\n"
+      << "  Actual: " << error_hex << " " << error_text << "\n";
+}
+
+}  // namespace
+
+AssertionResult IsHRESULTSuccess(const char* expr, long hr) {  // NOLINT
+  if (SUCCEEDED(hr)) {
+    return AssertionSuccess();
+  }
+  return HRESULTFailureHelper(expr, "succeeds", hr);
+}
+
+AssertionResult IsHRESULTFailure(const char* expr, long hr) {  // NOLINT
+  if (FAILED(hr)) {
+    return AssertionSuccess();
+  }
+  return HRESULTFailureHelper(expr, "fails", hr);
+}
+
+#endif  // GTEST_OS_WINDOWS
+
+// Utility functions for encoding Unicode text (wide strings) in
+// UTF-8.
+
+// A Unicode code-point can have up to 21 bits, and is encoded in UTF-8
+// like this:
+//
+// Code-point length   Encoding
+//   0 -  7 bits       0xxxxxxx
+//   8 - 11 bits       110xxxxx 10xxxxxx
+//  12 - 16 bits       1110xxxx 10xxxxxx 10xxxxxx
+//  17 - 21 bits       11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+
+// The maximum code-point a one-byte UTF-8 sequence can represent.
+constexpr uint32_t kMaxCodePoint1 = (static_cast<uint32_t>(1) <<  7) - 1;
+
+// The maximum code-point a two-byte UTF-8 sequence can represent.
+constexpr uint32_t kMaxCodePoint2 = (static_cast<uint32_t>(1) << (5 + 6)) - 1;
+
+// The maximum code-point a three-byte UTF-8 sequence can represent.
+constexpr uint32_t kMaxCodePoint3 = (static_cast<uint32_t>(1) << (4 + 2*6)) - 1;
+
+// The maximum code-point a four-byte UTF-8 sequence can represent.
+constexpr uint32_t kMaxCodePoint4 = (static_cast<uint32_t>(1) << (3 + 3*6)) - 1;
+
+// Chops off the n lowest bits from a bit pattern.  Returns the n
+// lowest bits.  As a side effect, the original bit pattern will be
+// shifted to the right by n bits.
+inline uint32_t ChopLowBits(uint32_t* bits, int n) {
+  const uint32_t low_bits = *bits & ((static_cast<uint32_t>(1) << n) - 1);
+  *bits >>= n;
+  return low_bits;
+}
+
+// Converts a Unicode code point to a narrow string in UTF-8 encoding.
+// code_point parameter is of type uint32_t because wchar_t may not be
+// wide enough to contain a code point.
+// If the code_point is not a valid Unicode code point
+// (i.e. outside of Unicode range U+0 to U+10FFFF) it will be converted
+// to "(Invalid Unicode 0xXXXXXXXX)".
+std::string CodePointToUtf8(uint32_t code_point) {
+  if (code_point > kMaxCodePoint4) {
+    return "(Invalid Unicode 0x" + String::FormatHexUInt32(code_point) + ")";
+  }
+
+  char str[5];  // Big enough for the largest valid code point.
+  if (code_point <= kMaxCodePoint1) {
+    str[1] = '\0';
+    str[0] = static_cast<char>(code_point);                          // 0xxxxxxx
+  } else if (code_point <= kMaxCodePoint2) {
+    str[2] = '\0';
+    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
+    str[0] = static_cast<char>(0xC0 | code_point);                   // 110xxxxx
+  } else if (code_point <= kMaxCodePoint3) {
+    str[3] = '\0';
+    str[2] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
+    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
+    str[0] = static_cast<char>(0xE0 | code_point);                   // 1110xxxx
+  } else {  // code_point <= kMaxCodePoint4
+    str[4] = '\0';
+    str[3] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
+    str[2] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
+    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
+    str[0] = static_cast<char>(0xF0 | code_point);                   // 11110xxx
+  }
+  return str;
+}
+
+// The following two functions only make sense if the system
+// uses UTF-16 for wide string encoding. All supported systems
+// with 16 bit wchar_t (Windows, Cygwin) do use UTF-16.
+
+// Determines if the arguments constitute UTF-16 surrogate pair
+// and thus should be combined into a single Unicode code point
+// using CreateCodePointFromUtf16SurrogatePair.
+inline bool IsUtf16SurrogatePair(wchar_t first, wchar_t second) {
+  return sizeof(wchar_t) == 2 &&
+      (first & 0xFC00) == 0xD800 && (second & 0xFC00) == 0xDC00;
+}
+
+// Creates a Unicode code point from UTF16 surrogate pair.
+inline uint32_t CreateCodePointFromUtf16SurrogatePair(wchar_t first,
+                                                      wchar_t second) {
+  const auto first_u = static_cast<uint32_t>(first);
+  const auto second_u = static_cast<uint32_t>(second);
+  const uint32_t mask = (1 << 10) - 1;
+  return (sizeof(wchar_t) == 2)
+             ? (((first_u & mask) << 10) | (second_u & mask)) + 0x10000
+             :
+             // This function should not be called when the condition is
+             // false, but we provide a sensible default in case it is.
+             first_u;
+}
+
+// Converts a wide string to a narrow string in UTF-8 encoding.
+// The wide string is assumed to have the following encoding:
+//   UTF-16 if sizeof(wchar_t) == 2 (on Windows, Cygwin)
+//   UTF-32 if sizeof(wchar_t) == 4 (on Linux)
+// Parameter str points to a null-terminated wide string.
+// Parameter num_chars may additionally limit the number
+// of wchar_t characters processed. -1 is used when the entire string
+// should be processed.
+// If the string contains code points that are not valid Unicode code points
+// (i.e. outside of Unicode range U+0 to U+10FFFF) they will be output
+// as '(Invalid Unicode 0xXXXXXXXX)'. If the string is in UTF16 encoding
+// and contains invalid UTF-16 surrogate pairs, values in those pairs
+// will be encoded as individual Unicode characters from Basic Normal Plane.
+std::string WideStringToUtf8(const wchar_t* str, int num_chars) {
+  if (num_chars == -1)
+    num_chars = static_cast<int>(wcslen(str));
+
+  ::std::stringstream stream;
+  for (int i = 0; i < num_chars; ++i) {
+    uint32_t unicode_code_point;
+
+    if (str[i] == L'\0') {
+      break;
+    } else if (i + 1 < num_chars && IsUtf16SurrogatePair(str[i], str[i + 1])) {
+      unicode_code_point = CreateCodePointFromUtf16SurrogatePair(str[i],
+                                                                 str[i + 1]);
+      i++;
+    } else {
+      unicode_code_point = static_cast<uint32_t>(str[i]);
+    }
+
+    stream << CodePointToUtf8(unicode_code_point);
+  }
+  return StringStreamToString(&stream);
+}
+
+// Converts a wide C string to an std::string using the UTF-8 encoding.
+// NULL will be converted to "(null)".
+std::string String::ShowWideCString(const wchar_t * wide_c_str) {
+  if (wide_c_str == nullptr) return "(null)";
+
+  return internal::WideStringToUtf8(wide_c_str, -1);
+}
+
+// Compares two wide C strings.  Returns true if and only if they have the
+// same content.
+//
+// Unlike wcscmp(), this function can handle NULL argument(s).  A NULL
+// C string is considered different to any non-NULL C string,
+// including the empty string.
+bool String::WideCStringEquals(const wchar_t * lhs, const wchar_t * rhs) {
+  if (lhs == nullptr) return rhs == nullptr;
+
+  if (rhs == nullptr) return false;
+
+  return wcscmp(lhs, rhs) == 0;
+}
+
+// Helper function for *_STREQ on wide strings.
+AssertionResult CmpHelperSTREQ(const char* lhs_expression,
+                               const char* rhs_expression,
+                               const wchar_t* lhs,
+                               const wchar_t* rhs) {
+  if (String::WideCStringEquals(lhs, rhs)) {
+    return AssertionSuccess();
+  }
+
+  return EqFailure(lhs_expression,
+                   rhs_expression,
+                   PrintToString(lhs),
+                   PrintToString(rhs),
+                   false);
+}
+
+// Helper function for *_STRNE on wide strings.
+AssertionResult CmpHelperSTRNE(const char* s1_expression,
+                               const char* s2_expression,
+                               const wchar_t* s1,
+                               const wchar_t* s2) {
+  if (!String::WideCStringEquals(s1, s2)) {
+    return AssertionSuccess();
+  }
+
+  return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
+                            << s2_expression << "), actual: "
+                            << PrintToString(s1)
+                            << " vs " << PrintToString(s2);
+}
+
+// Compares two C strings, ignoring case.  Returns true if and only if they have
+// the same content.
+//
+// Unlike strcasecmp(), this function can handle NULL argument(s).  A
+// NULL C string is considered different to any non-NULL C string,
+// including the empty string.
+bool String::CaseInsensitiveCStringEquals(const char * lhs, const char * rhs) {
+  if (lhs == nullptr) return rhs == nullptr;
+  if (rhs == nullptr) return false;
+  return posix::StrCaseCmp(lhs, rhs) == 0;
+}
+
+// Compares two wide C strings, ignoring case.  Returns true if and only if they
+// have the same content.
+//
+// Unlike wcscasecmp(), this function can handle NULL argument(s).
+// A NULL C string is considered different to any non-NULL wide C string,
+// including the empty string.
+// NB: The implementations on different platforms slightly differ.
+// On windows, this method uses _wcsicmp which compares according to LC_CTYPE
+// environment variable. On GNU platform this method uses wcscasecmp
+// which compares according to LC_CTYPE category of the current locale.
+// On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
+// current locale.
+bool String::CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
+                                              const wchar_t* rhs) {
+  if (lhs == nullptr) return rhs == nullptr;
+
+  if (rhs == nullptr) return false;
+
+#if GTEST_OS_WINDOWS
+  return _wcsicmp(lhs, rhs) == 0;
+#elif GTEST_OS_LINUX && !GTEST_OS_LINUX_ANDROID
+  return wcscasecmp(lhs, rhs) == 0;
+#else
+  // Android, Mac OS X and Cygwin don't define wcscasecmp.
+  // Other unknown OSes may not define it either.
+  wint_t left, right;
+  do {
+    left = towlower(static_cast<wint_t>(*lhs++));
+    right = towlower(static_cast<wint_t>(*rhs++));
+  } while (left && left == right);
+  return left == right;
+#endif  // OS selector
+}
+
+// Returns true if and only if str ends with the given suffix, ignoring case.
+// Any string is considered to end with an empty suffix.
+bool String::EndsWithCaseInsensitive(
+    const std::string& str, const std::string& suffix) {
+  const size_t str_len = str.length();
+  const size_t suffix_len = suffix.length();
+  return (str_len >= suffix_len) &&
+         CaseInsensitiveCStringEquals(str.c_str() + str_len - suffix_len,
+                                      suffix.c_str());
+}
+
+// Formats an int value as "%02d".
+std::string String::FormatIntWidth2(int value) {
+  return FormatIntWidthN(value, 2);
+}
+
+// Formats an int value to given width with leading zeros.
+std::string String::FormatIntWidthN(int value, int width) {
+  std::stringstream ss;
+  ss << std::setfill('0') << std::setw(width) << value;
+  return ss.str();
+}
+
+// Formats an int value as "%X".
+std::string String::FormatHexUInt32(uint32_t value) {
+  std::stringstream ss;
+  ss << std::hex << std::uppercase << value;
+  return ss.str();
+}
+
+// Formats an int value as "%X".
+std::string String::FormatHexInt(int value) {
+  return FormatHexUInt32(static_cast<uint32_t>(value));
+}
+
+// Formats a byte as "%02X".
+std::string String::FormatByte(unsigned char value) {
+  std::stringstream ss;
+  ss << std::setfill('0') << std::setw(2) << std::hex << std::uppercase
+     << static_cast<unsigned int>(value);
+  return ss.str();
+}
+
+// Converts the buffer in a stringstream to an std::string, converting NUL
+// bytes to "\\0" along the way.
+std::string StringStreamToString(::std::stringstream* ss) {
+  const ::std::string& str = ss->str();
+  const char* const start = str.c_str();
+  const char* const end = start + str.length();
+
+  std::string result;
+  result.reserve(static_cast<size_t>(2 * (end - start)));
+  for (const char* ch = start; ch != end; ++ch) {
+    if (*ch == '\0') {
+      result += "\\0";  // Replaces NUL with "\\0";
+    } else {
+      result += *ch;
+    }
+  }
+
+  return result;
+}
+
+// Appends the user-supplied message to the Google-Test-generated message.
+std::string AppendUserMessage(const std::string& gtest_msg,
+                              const Message& user_msg) {
+  // Appends the user message if it's non-empty.
+  const std::string user_msg_string = user_msg.GetString();
+  if (user_msg_string.empty()) {
+    return gtest_msg;
+  }
+  if (gtest_msg.empty()) {
+    return user_msg_string;
+  }
+  return gtest_msg + "\n" + user_msg_string;
+}
+
+}  // namespace internal
+
+// class TestResult
+
+// Creates an empty TestResult.
+TestResult::TestResult()
+    : death_test_count_(0), start_timestamp_(0), elapsed_time_(0) {}
+
+// D'tor.
+TestResult::~TestResult() {
+}
+
+// Returns the i-th test part result among all the results. i can
+// range from 0 to total_part_count() - 1. If i is not in that range,
+// aborts the program.
+const TestPartResult& TestResult::GetTestPartResult(int i) const {
+  if (i < 0 || i >= total_part_count())
+    internal::posix::Abort();
+  return test_part_results_.at(static_cast<size_t>(i));
+}
+
+// Returns the i-th test property. i can range from 0 to
+// test_property_count() - 1. If i is not in that range, aborts the
+// program.
+const TestProperty& TestResult::GetTestProperty(int i) const {
+  if (i < 0 || i >= test_property_count())
+    internal::posix::Abort();
+  return test_properties_.at(static_cast<size_t>(i));
+}
+
+// Clears the test part results.
+void TestResult::ClearTestPartResults() {
+  test_part_results_.clear();
+}
+
+// Adds a test part result to the list.
+void TestResult::AddTestPartResult(const TestPartResult& test_part_result) {
+  test_part_results_.push_back(test_part_result);
+}
+
+// Adds a test property to the list. If a property with the same key as the
+// supplied property is already represented, the value of this test_property
+// replaces the old value for that key.
+void TestResult::RecordProperty(const std::string& xml_element,
+                                const TestProperty& test_property) {
+  if (!ValidateTestProperty(xml_element, test_property)) {
+    return;
+  }
+  internal::MutexLock lock(&test_properties_mutex_);
+  const std::vector<TestProperty>::iterator property_with_matching_key =
+      std::find_if(test_properties_.begin(), test_properties_.end(),
+                   internal::TestPropertyKeyIs(test_property.key()));
+  if (property_with_matching_key == test_properties_.end()) {
+    test_properties_.push_back(test_property);
+    return;
+  }
+  property_with_matching_key->SetValue(test_property.value());
+}
+
+// The list of reserved attributes used in the <testsuites> element of XML
+// output.
+static const char* const kReservedTestSuitesAttributes[] = {
+  "disabled",
+  "errors",
+  "failures",
+  "name",
+  "random_seed",
+  "tests",
+  "time",
+  "timestamp"
+};
+
+// The list of reserved attributes used in the <testsuite> element of XML
+// output.
+static const char* const kReservedTestSuiteAttributes[] = {
+    "disabled", "errors", "failures",  "name",
+    "tests",    "time",   "timestamp", "skipped"};
+
+// The list of reserved attributes used in the <testcase> element of XML output.
+static const char* const kReservedTestCaseAttributes[] = {
+    "classname",   "name", "status", "time",  "type_param",
+    "value_param", "file", "line"};
+
+// Use a slightly different set for allowed output to ensure existing tests can
+// still RecordProperty("result") or "RecordProperty(timestamp")
+static const char* const kReservedOutputTestCaseAttributes[] = {
+    "classname",   "name", "status", "time",   "type_param",
+    "value_param", "file", "line",   "result", "timestamp"};
+
+template <size_t kSize>
+std::vector<std::string> ArrayAsVector(const char* const (&array)[kSize]) {
+  return std::vector<std::string>(array, array + kSize);
+}
+
+static std::vector<std::string> GetReservedAttributesForElement(
+    const std::string& xml_element) {
+  if (xml_element == "testsuites") {
+    return ArrayAsVector(kReservedTestSuitesAttributes);
+  } else if (xml_element == "testsuite") {
+    return ArrayAsVector(kReservedTestSuiteAttributes);
+  } else if (xml_element == "testcase") {
+    return ArrayAsVector(kReservedTestCaseAttributes);
+  } else {
+    GTEST_CHECK_(false) << "Unrecognized xml_element provided: " << xml_element;
+  }
+  // This code is unreachable but some compilers may not realizes that.
+  return std::vector<std::string>();
+}
+
+// TODO(jdesprez): Merge the two getReserved attributes once skip is improved
+static std::vector<std::string> GetReservedOutputAttributesForElement(
+    const std::string& xml_element) {
+  if (xml_element == "testsuites") {
+    return ArrayAsVector(kReservedTestSuitesAttributes);
+  } else if (xml_element == "testsuite") {
+    return ArrayAsVector(kReservedTestSuiteAttributes);
+  } else if (xml_element == "testcase") {
+    return ArrayAsVector(kReservedOutputTestCaseAttributes);
+  } else {
+    GTEST_CHECK_(false) << "Unrecognized xml_element provided: " << xml_element;
+  }
+  // This code is unreachable but some compilers may not realizes that.
+  return std::vector<std::string>();
+}
+
+static std::string FormatWordList(const std::vector<std::string>& words) {
+  Message word_list;
+  for (size_t i = 0; i < words.size(); ++i) {
+    if (i > 0 && words.size() > 2) {
+      word_list << ", ";
+    }
+    if (i == words.size() - 1) {
+      word_list << "and ";
+    }
+    word_list << "'" << words[i] << "'";
+  }
+  return word_list.GetString();
+}
+
+static bool ValidateTestPropertyName(
+    const std::string& property_name,
+    const std::vector<std::string>& reserved_names) {
+  if (std::find(reserved_names.begin(), reserved_names.end(), property_name) !=
+          reserved_names.end()) {
+    ADD_FAILURE() << "Reserved key used in RecordProperty(): " << property_name
+                  << " (" << FormatWordList(reserved_names)
+                  << " are reserved by " << GTEST_NAME_ << ")";
+    return false;
+  }
+  return true;
+}
+
+// Adds a failure if the key is a reserved attribute of the element named
+// xml_element.  Returns true if the property is valid.
+bool TestResult::ValidateTestProperty(const std::string& xml_element,
+                                      const TestProperty& test_property) {
+  return ValidateTestPropertyName(test_property.key(),
+                                  GetReservedAttributesForElement(xml_element));
+}
+
+// Clears the object.
+void TestResult::Clear() {
+  test_part_results_.clear();
+  test_properties_.clear();
+  death_test_count_ = 0;
+  elapsed_time_ = 0;
+}
+
+// Returns true off the test part was skipped.
+static bool TestPartSkipped(const TestPartResult& result) {
+  return result.skipped();
+}
+
+// Returns true if and only if the test was skipped.
+bool TestResult::Skipped() const {
+  return !Failed() && CountIf(test_part_results_, TestPartSkipped) > 0;
+}
+
+// Returns true if and only if the test failed.
+bool TestResult::Failed() const {
+  for (int i = 0; i < total_part_count(); ++i) {
+    if (GetTestPartResult(i).failed())
+      return true;
+  }
+  return false;
+}
+
+// Returns true if and only if the test part fatally failed.
+static bool TestPartFatallyFailed(const TestPartResult& result) {
+  return result.fatally_failed();
+}
+
+// Returns true if and only if the test fatally failed.
+bool TestResult::HasFatalFailure() const {
+  return CountIf(test_part_results_, TestPartFatallyFailed) > 0;
+}
+
+// Returns true if and only if the test part non-fatally failed.
+static bool TestPartNonfatallyFailed(const TestPartResult& result) {
+  return result.nonfatally_failed();
+}
+
+// Returns true if and only if the test has a non-fatal failure.
+bool TestResult::HasNonfatalFailure() const {
+  return CountIf(test_part_results_, TestPartNonfatallyFailed) > 0;
+}
+
+// Gets the number of all test parts.  This is the sum of the number
+// of successful test parts and the number of failed test parts.
+int TestResult::total_part_count() const {
+  return static_cast<int>(test_part_results_.size());
+}
+
+// Returns the number of the test properties.
+int TestResult::test_property_count() const {
+  return static_cast<int>(test_properties_.size());
+}
+
+// class Test
+
+// Creates a Test object.
+
+// The c'tor saves the states of all flags.
+Test::Test()
+    : gtest_flag_saver_(new GTEST_FLAG_SAVER_) {
+}
+
+// The d'tor restores the states of all flags.  The actual work is
+// done by the d'tor of the gtest_flag_saver_ field, and thus not
+// visible here.
+Test::~Test() {
+}
+
+// Sets up the test fixture.
+//
+// A sub-class may override this.
+void Test::SetUp() {
+}
+
+// Tears down the test fixture.
+//
+// A sub-class may override this.
+void Test::TearDown() {
+}
+
+// Allows user supplied key value pairs to be recorded for later output.
+void Test::RecordProperty(const std::string& key, const std::string& value) {
+  UnitTest::GetInstance()->RecordProperty(key, value);
+}
+
+// Allows user supplied key value pairs to be recorded for later output.
+void Test::RecordProperty(const std::string& key, int value) {
+  Message value_message;
+  value_message << value;
+  RecordProperty(key, value_message.GetString().c_str());
+}
+
+namespace internal {
+
+void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
+                                    const std::string& message) {
+  // This function is a friend of UnitTest and as such has access to
+  // AddTestPartResult.
+  UnitTest::GetInstance()->AddTestPartResult(
+      result_type,
+      nullptr,  // No info about the source file where the exception occurred.
+      -1,       // We have no info on which line caused the exception.
+      message,
+      "");  // No stack trace, either.
+}
+
+}  // namespace internal
+
+// Google Test requires all tests in the same test suite to use the same test
+// fixture class.  This function checks if the current test has the
+// same fixture class as the first test in the current test suite.  If
+// yes, it returns true; otherwise it generates a Google Test failure and
+// returns false.
+bool Test::HasSameFixtureClass() {
+  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
+  const TestSuite* const test_suite = impl->current_test_suite();
+
+  // Info about the first test in the current test suite.
+  const TestInfo* const first_test_info = test_suite->test_info_list()[0];
+  const internal::TypeId first_fixture_id = first_test_info->fixture_class_id_;
+  const char* const first_test_name = first_test_info->name();
+
+  // Info about the current test.
+  const TestInfo* const this_test_info = impl->current_test_info();
+  const internal::TypeId this_fixture_id = this_test_info->fixture_class_id_;
+  const char* const this_test_name = this_test_info->name();
+
+  if (this_fixture_id != first_fixture_id) {
+    // Is the first test defined using TEST?
+    const bool first_is_TEST = first_fixture_id == internal::GetTestTypeId();
+    // Is this test defined using TEST?
+    const bool this_is_TEST = this_fixture_id == internal::GetTestTypeId();
+
+    if (first_is_TEST || this_is_TEST) {
+      // Both TEST and TEST_F appear in same test suite, which is incorrect.
+      // Tell the user how to fix this.
+
+      // Gets the name of the TEST and the name of the TEST_F.  Note
+      // that first_is_TEST and this_is_TEST cannot both be true, as
+      // the fixture IDs are different for the two tests.
+      const char* const TEST_name =
+          first_is_TEST ? first_test_name : this_test_name;
+      const char* const TEST_F_name =
+          first_is_TEST ? this_test_name : first_test_name;
+
+      ADD_FAILURE()
+          << "All tests in the same test suite must use the same test fixture\n"
+          << "class, so mixing TEST_F and TEST in the same test suite is\n"
+          << "illegal.  In test suite " << this_test_info->test_suite_name()
+          << ",\n"
+          << "test " << TEST_F_name << " is defined using TEST_F but\n"
+          << "test " << TEST_name << " is defined using TEST.  You probably\n"
+          << "want to change the TEST to TEST_F or move it to another test\n"
+          << "case.";
+    } else {
+      // Two fixture classes with the same name appear in two different
+      // namespaces, which is not allowed. Tell the user how to fix this.
+      ADD_FAILURE()
+          << "All tests in the same test suite must use the same test fixture\n"
+          << "class.  However, in test suite "
+          << this_test_info->test_suite_name() << ",\n"
+          << "you defined test " << first_test_name << " and test "
+          << this_test_name << "\n"
+          << "using two different test fixture classes.  This can happen if\n"
+          << "the two classes are from different namespaces or translation\n"
+          << "units and have the same name.  You should probably rename one\n"
+          << "of the classes to put the tests into different test suites.";
+    }
+    return false;
+  }
+
+  return true;
+}
+
+#if GTEST_HAS_SEH
+
+// Adds an "exception thrown" fatal failure to the current test.  This
+// function returns its result via an output parameter pointer because VC++
+// prohibits creation of objects with destructors on stack in functions
+// using __try (see error C2712).
+static std::string* FormatSehExceptionMessage(DWORD exception_code,
+                                              const char* location) {
+  Message message;
+  message << "SEH exception with code 0x" << std::setbase(16) <<
+    exception_code << std::setbase(10) << " thrown in " << location << ".";
+
+  return new std::string(message.GetString());
+}
+
+#endif  // GTEST_HAS_SEH
+
+namespace internal {
+
+#if GTEST_HAS_EXCEPTIONS
+
+// Adds an "exception thrown" fatal failure to the current test.
+static std::string FormatCxxExceptionMessage(const char* description,
+                                             const char* location) {
+  Message message;
+  if (description != nullptr) {
+    message << "C++ exception with description \"" << description << "\"";
+  } else {
+    message << "Unknown C++ exception";
+  }
+  message << " thrown in " << location << ".";
+
+  return message.GetString();
+}
+
+static std::string PrintTestPartResultToString(
+    const TestPartResult& test_part_result);
+
+GoogleTestFailureException::GoogleTestFailureException(
+    const TestPartResult& failure)
+    : ::std::runtime_error(PrintTestPartResultToString(failure).c_str()) {}
+
+#endif  // GTEST_HAS_EXCEPTIONS
+
+// We put these helper functions in the internal namespace as IBM's xlC
+// compiler rejects the code if they were declared static.
+
+// Runs the given method and handles SEH exceptions it throws, when
+// SEH is supported; returns the 0-value for type Result in case of an
+// SEH exception.  (Microsoft compilers cannot handle SEH and C++
+// exceptions in the same function.  Therefore, we provide a separate
+// wrapper function for handling SEH exceptions.)
+template <class T, typename Result>
+Result HandleSehExceptionsInMethodIfSupported(
+    T* object, Result (T::*method)(), const char* location) {
+#if GTEST_HAS_SEH
+  __try {
+    return (object->*method)();
+  } __except (internal::UnitTestOptions::GTestShouldProcessSEH(  // NOLINT
+      GetExceptionCode())) {
+    // We create the exception message on the heap because VC++ prohibits
+    // creation of objects with destructors on stack in functions using __try
+    // (see error C2712).
+    std::string* exception_message = FormatSehExceptionMessage(
+        GetExceptionCode(), location);
+    internal::ReportFailureInUnknownLocation(TestPartResult::kFatalFailure,
+                                             *exception_message);
+    delete exception_message;
+    return static_cast<Result>(0);
+  }
+#else
+  (void)location;
+  return (object->*method)();
+#endif  // GTEST_HAS_SEH
+}
+
+// Runs the given method and catches and reports C++ and/or SEH-style
+// exceptions, if they are supported; returns the 0-value for type
+// Result in case of an SEH exception.
+template <class T, typename Result>
+Result HandleExceptionsInMethodIfSupported(
+    T* object, Result (T::*method)(), const char* location) {
+  // NOTE: The user code can affect the way in which Google Test handles
+  // exceptions by setting GTEST_FLAG(catch_exceptions), but only before
+  // RUN_ALL_TESTS() starts. It is technically possible to check the flag
+  // after the exception is caught and either report or re-throw the
+  // exception based on the flag's value:
+  //
+  // try {
+  //   // Perform the test method.
+  // } catch (...) {
+  //   if (GTEST_FLAG(catch_exceptions))
+  //     // Report the exception as failure.
+  //   else
+  //     throw;  // Re-throws the original exception.
+  // }
+  //
+  // However, the purpose of this flag is to allow the program to drop into
+  // the debugger when the exception is thrown. On most platforms, once the
+  // control enters the catch block, the exception origin information is
+  // lost and the debugger will stop the program at the point of the
+  // re-throw in this function -- instead of at the point of the original
+  // throw statement in the code under test.  For this reason, we perform
+  // the check early, sacrificing the ability to affect Google Test's
+  // exception handling in the method where the exception is thrown.
+  if (internal::GetUnitTestImpl()->catch_exceptions()) {
+#if GTEST_HAS_EXCEPTIONS
+    try {
+      return HandleSehExceptionsInMethodIfSupported(object, method, location);
+    } catch (const AssertionException&) {  // NOLINT
+      // This failure was reported already.
+    } catch (const internal::GoogleTestFailureException&) {  // NOLINT
+      // This exception type can only be thrown by a failed Google
+      // Test assertion with the intention of letting another testing
+      // framework catch it.  Therefore we just re-throw it.
+      throw;
+    } catch (const std::exception& e) {  // NOLINT
+      internal::ReportFailureInUnknownLocation(
+          TestPartResult::kFatalFailure,
+          FormatCxxExceptionMessage(e.what(), location));
+    } catch (...) {  // NOLINT
+      internal::ReportFailureInUnknownLocation(
+          TestPartResult::kFatalFailure,
+          FormatCxxExceptionMessage(nullptr, location));
+    }
+    return static_cast<Result>(0);
+#else
+    return HandleSehExceptionsInMethodIfSupported(object, method, location);
+#endif  // GTEST_HAS_EXCEPTIONS
+  } else {
+    return (object->*method)();
+  }
+}
+
+}  // namespace internal
+
+// Runs the test and updates the test result.
+void Test::Run() {
+  if (!HasSameFixtureClass()) return;
+
+  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
+  impl->os_stack_trace_getter()->UponLeavingGTest();
+  internal::HandleExceptionsInMethodIfSupported(this, &Test::SetUp, "SetUp()");
+  // We will run the test only if SetUp() was successful and didn't call
+  // GTEST_SKIP().
+  if (!HasFatalFailure() && !IsSkipped()) {
+    impl->os_stack_trace_getter()->UponLeavingGTest();
+    internal::HandleExceptionsInMethodIfSupported(
+        this, &Test::TestBody, "the test body");
+  }
+
+  // However, we want to clean up as much as possible.  Hence we will
+  // always call TearDown(), even if SetUp() or the test body has
+  // failed.
+  impl->os_stack_trace_getter()->UponLeavingGTest();
+  internal::HandleExceptionsInMethodIfSupported(
+      this, &Test::TearDown, "TearDown()");
+}
+
+// Returns true if and only if the current test has a fatal failure.
+bool Test::HasFatalFailure() {
+  return internal::GetUnitTestImpl()->current_test_result()->HasFatalFailure();
+}
+
+// Returns true if and only if the current test has a non-fatal failure.
+bool Test::HasNonfatalFailure() {
+  return internal::GetUnitTestImpl()->current_test_result()->
+      HasNonfatalFailure();
+}
+
+// Returns true if and only if the current test was skipped.
+bool Test::IsSkipped() {
+  return internal::GetUnitTestImpl()->current_test_result()->Skipped();
+}
+
+// class TestInfo
+
+// Constructs a TestInfo object. It assumes ownership of the test factory
+// object.
+TestInfo::TestInfo(const std::string& a_test_suite_name,
+                   const std::string& a_name, const char* a_type_param,
+                   const char* a_value_param,
+                   internal::CodeLocation a_code_location,
+                   internal::TypeId fixture_class_id,
+                   internal::TestFactoryBase* factory)
+    : test_suite_name_(a_test_suite_name),
+      name_(a_name),
+      type_param_(a_type_param ? new std::string(a_type_param) : nullptr),
+      value_param_(a_value_param ? new std::string(a_value_param) : nullptr),
+      location_(a_code_location),
+      fixture_class_id_(fixture_class_id),
+      should_run_(false),
+      is_disabled_(false),
+      matches_filter_(false),
+      is_in_another_shard_(false),
+      factory_(factory),
+      result_() {}
+
+// Destructs a TestInfo object.
+TestInfo::~TestInfo() { delete factory_; }
+
+namespace internal {
+
+// Creates a new TestInfo object and registers it with Google Test;
+// returns the created object.
+//
+// Arguments:
+//
+//   test_suite_name:  name of the test suite
+//   name:             name of the test
+//   type_param:       the name of the test's type parameter, or NULL if
+//                     this is not a typed or a type-parameterized test.
+//   value_param:      text representation of the test's value parameter,
+//                     or NULL if this is not a value-parameterized test.
+//   code_location:    code location where the test is defined
+//   fixture_class_id: ID of the test fixture class
+//   set_up_tc:        pointer to the function that sets up the test suite
+//   tear_down_tc:     pointer to the function that tears down the test suite
+//   factory:          pointer to the factory that creates a test object.
+//                     The newly created TestInfo instance will assume
+//                     ownership of the factory object.
+TestInfo* MakeAndRegisterTestInfo(
+    const char* test_suite_name, const char* name, const char* type_param,
+    const char* value_param, CodeLocation code_location,
+    TypeId fixture_class_id, SetUpTestSuiteFunc set_up_tc,
+    TearDownTestSuiteFunc tear_down_tc, TestFactoryBase* factory) {
+  TestInfo* const test_info =
+      new TestInfo(test_suite_name, name, type_param, value_param,
+                   code_location, fixture_class_id, factory);
+  GetUnitTestImpl()->AddTestInfo(set_up_tc, tear_down_tc, test_info);
+  return test_info;
+}
+
+void ReportInvalidTestSuiteType(const char* test_suite_name,
+                                CodeLocation code_location) {
+  Message errors;
+  errors
+      << "Attempted redefinition of test suite " << test_suite_name << ".\n"
+      << "All tests in the same test suite must use the same test fixture\n"
+      << "class.  However, in test suite " << test_suite_name << ", you tried\n"
+      << "to define a test using a fixture class different from the one\n"
+      << "used earlier. This can happen if the two fixture classes are\n"
+      << "from different namespaces and have the same name. You should\n"
+      << "probably rename one of the classes to put the tests into different\n"
+      << "test suites.";
+
+  GTEST_LOG_(ERROR) << FormatFileLocation(code_location.file.c_str(),
+                                          code_location.line)
+                    << " " << errors.GetString();
+}
+}  // namespace internal
+
+namespace {
+
+// A predicate that checks the test name of a TestInfo against a known
+// value.
+//
+// This is used for implementation of the TestSuite class only.  We put
+// it in the anonymous namespace to prevent polluting the outer
+// namespace.
+//
+// TestNameIs is copyable.
+class TestNameIs {
+ public:
+  // Constructor.
+  //
+  // TestNameIs has NO default constructor.
+  explicit TestNameIs(const char* name)
+      : name_(name) {}
+
+  // Returns true if and only if the test name of test_info matches name_.
+  bool operator()(const TestInfo * test_info) const {
+    return test_info && test_info->name() == name_;
+  }
+
+ private:
+  std::string name_;
+};
+
+}  // namespace
+
+namespace internal {
+
+// This method expands all parameterized tests registered with macros TEST_P
+// and INSTANTIATE_TEST_SUITE_P into regular tests and registers those.
+// This will be done just once during the program runtime.
+void UnitTestImpl::RegisterParameterizedTests() {
+  if (!parameterized_tests_registered_) {
+    parameterized_test_registry_.RegisterTests();
+    type_parameterized_test_registry_.CheckForInstantiations();
+    parameterized_tests_registered_ = true;
+  }
+}
+
+}  // namespace internal
+
+// Creates the test object, runs it, records its result, and then
+// deletes it.
+void TestInfo::Run() {
+  if (!should_run_) return;
+
+  // Tells UnitTest where to store test result.
+  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
+  impl->set_current_test_info(this);
+
+  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
+
+  // Notifies the unit test event listeners that a test is about to start.
+  repeater->OnTestStart(*this);
+
+  result_.set_start_timestamp(internal::GetTimeInMillis());
+  internal::Timer timer;
+
+  impl->os_stack_trace_getter()->UponLeavingGTest();
+
+  // Creates the test object.
+  Test* const test = internal::HandleExceptionsInMethodIfSupported(
+      factory_, &internal::TestFactoryBase::CreateTest,
+      "the test fixture's constructor");
+
+  // Runs the test if the constructor didn't generate a fatal failure or invoke
+  // GTEST_SKIP().
+  // Note that the object will not be null
+  if (!Test::HasFatalFailure() && !Test::IsSkipped()) {
+    // This doesn't throw as all user code that can throw are wrapped into
+    // exception handling code.
+    test->Run();
+  }
+
+  if (test != nullptr) {
+    // Deletes the test object.
+    impl->os_stack_trace_getter()->UponLeavingGTest();
+    internal::HandleExceptionsInMethodIfSupported(
+        test, &Test::DeleteSelf_, "the test fixture's destructor");
+  }
+
+  result_.set_elapsed_time(timer.Elapsed());
+
+  // Notifies the unit test event listener that a test has just finished.
+  repeater->OnTestEnd(*this);
+
+  // Tells UnitTest to stop associating assertion results to this
+  // test.
+  impl->set_current_test_info(nullptr);
+}
+
+// Skip and records a skipped test result for this object.
+void TestInfo::Skip() {
+  if (!should_run_) return;
+
+  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
+  impl->set_current_test_info(this);
+
+  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
+
+  // Notifies the unit test event listeners that a test is about to start.
+  repeater->OnTestStart(*this);
+
+  const TestPartResult test_part_result =
+      TestPartResult(TestPartResult::kSkip, this->file(), this->line(), "");
+  impl->GetTestPartResultReporterForCurrentThread()->ReportTestPartResult(
+      test_part_result);
+
+  // Notifies the unit test event listener that a test has just finished.
+  repeater->OnTestEnd(*this);
+  impl->set_current_test_info(nullptr);
+}
+
+// class TestSuite
+
+// Gets the number of successful tests in this test suite.
+int TestSuite::successful_test_count() const {
+  return CountIf(test_info_list_, TestPassed);
+}
+
+// Gets the number of successful tests in this test suite.
+int TestSuite::skipped_test_count() const {
+  return CountIf(test_info_list_, TestSkipped);
+}
+
+// Gets the number of failed tests in this test suite.
+int TestSuite::failed_test_count() const {
+  return CountIf(test_info_list_, TestFailed);
+}
+
+// Gets the number of disabled tests that will be reported in the XML report.
+int TestSuite::reportable_disabled_test_count() const {
+  return CountIf(test_info_list_, TestReportableDisabled);
+}
+
+// Gets the number of disabled tests in this test suite.
+int TestSuite::disabled_test_count() const {
+  return CountIf(test_info_list_, TestDisabled);
+}
+
+// Gets the number of tests to be printed in the XML report.
+int TestSuite::reportable_test_count() const {
+  return CountIf(test_info_list_, TestReportable);
+}
+
+// Get the number of tests in this test suite that should run.
+int TestSuite::test_to_run_count() const {
+  return CountIf(test_info_list_, ShouldRunTest);
+}
+
+// Gets the number of all tests.
+int TestSuite::total_test_count() const {
+  return static_cast<int>(test_info_list_.size());
+}
+
+// Creates a TestSuite with the given name.
+//
+// Arguments:
+//
+//   a_name:       name of the test suite
+//   a_type_param: the name of the test suite's type parameter, or NULL if
+//                 this is not a typed or a type-parameterized test suite.
+//   set_up_tc:    pointer to the function that sets up the test suite
+//   tear_down_tc: pointer to the function that tears down the test suite
+TestSuite::TestSuite(const char* a_name, const char* a_type_param,
+                     internal::SetUpTestSuiteFunc set_up_tc,
+                     internal::TearDownTestSuiteFunc tear_down_tc)
+    : name_(a_name),
+      type_param_(a_type_param ? new std::string(a_type_param) : nullptr),
+      set_up_tc_(set_up_tc),
+      tear_down_tc_(tear_down_tc),
+      should_run_(false),
+      start_timestamp_(0),
+      elapsed_time_(0) {}
+
+// Destructor of TestSuite.
+TestSuite::~TestSuite() {
+  // Deletes every Test in the collection.
+  ForEach(test_info_list_, internal::Delete<TestInfo>);
+}
+
+// Returns the i-th test among all the tests. i can range from 0 to
+// total_test_count() - 1. If i is not in that range, returns NULL.
+const TestInfo* TestSuite::GetTestInfo(int i) const {
+  const int index = GetElementOr(test_indices_, i, -1);
+  return index < 0 ? nullptr : test_info_list_[static_cast<size_t>(index)];
+}
+
+// Returns the i-th test among all the tests. i can range from 0 to
+// total_test_count() - 1. If i is not in that range, returns NULL.
+TestInfo* TestSuite::GetMutableTestInfo(int i) {
+  const int index = GetElementOr(test_indices_, i, -1);
+  return index < 0 ? nullptr : test_info_list_[static_cast<size_t>(index)];
+}
+
+// Adds a test to this test suite.  Will delete the test upon
+// destruction of the TestSuite object.
+void TestSuite::AddTestInfo(TestInfo* test_info) {
+  test_info_list_.push_back(test_info);
+  test_indices_.push_back(static_cast<int>(test_indices_.size()));
+}
+
+// Runs every test in this TestSuite.
+void TestSuite::Run() {
+  if (!should_run_) return;
+
+  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
+  impl->set_current_test_suite(this);
+
+  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
+
+  // Call both legacy and the new API
+  repeater->OnTestSuiteStart(*this);
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  repeater->OnTestCaseStart(*this);
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  impl->os_stack_trace_getter()->UponLeavingGTest();
+  internal::HandleExceptionsInMethodIfSupported(
+      this, &TestSuite::RunSetUpTestSuite, "SetUpTestSuite()");
+
+  start_timestamp_ = internal::GetTimeInMillis();
+  internal::Timer timer;
+  for (int i = 0; i < total_test_count(); i++) {
+    GetMutableTestInfo(i)->Run();
+    if (GTEST_FLAG(fail_fast) && GetMutableTestInfo(i)->result()->Failed()) {
+      for (int j = i + 1; j < total_test_count(); j++) {
+        GetMutableTestInfo(j)->Skip();
+      }
+      break;
+    }
+  }
+  elapsed_time_ = timer.Elapsed();
+
+  impl->os_stack_trace_getter()->UponLeavingGTest();
+  internal::HandleExceptionsInMethodIfSupported(
+      this, &TestSuite::RunTearDownTestSuite, "TearDownTestSuite()");
+
+  // Call both legacy and the new API
+  repeater->OnTestSuiteEnd(*this);
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  repeater->OnTestCaseEnd(*this);
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  impl->set_current_test_suite(nullptr);
+}
+
+// Skips all tests under this TestSuite.
+void TestSuite::Skip() {
+  if (!should_run_) return;
+
+  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
+  impl->set_current_test_suite(this);
+
+  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
+
+  // Call both legacy and the new API
+  repeater->OnTestSuiteStart(*this);
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  repeater->OnTestCaseStart(*this);
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  for (int i = 0; i < total_test_count(); i++) {
+    GetMutableTestInfo(i)->Skip();
+  }
+
+  // Call both legacy and the new API
+  repeater->OnTestSuiteEnd(*this);
+  // Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  repeater->OnTestCaseEnd(*this);
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  impl->set_current_test_suite(nullptr);
+}
+
+// Clears the results of all tests in this test suite.
+void TestSuite::ClearResult() {
+  ad_hoc_test_result_.Clear();
+  ForEach(test_info_list_, TestInfo::ClearTestResult);
+}
+
+// Shuffles the tests in this test suite.
+void TestSuite::ShuffleTests(internal::Random* random) {
+  Shuffle(random, &test_indices_);
+}
+
+// Restores the test order to before the first shuffle.
+void TestSuite::UnshuffleTests() {
+  for (size_t i = 0; i < test_indices_.size(); i++) {
+    test_indices_[i] = static_cast<int>(i);
+  }
+}
+
+// Formats a countable noun.  Depending on its quantity, either the
+// singular form or the plural form is used. e.g.
+//
+// FormatCountableNoun(1, "formula", "formuli") returns "1 formula".
+// FormatCountableNoun(5, "book", "books") returns "5 books".
+static std::string FormatCountableNoun(int count,
+                                       const char * singular_form,
+                                       const char * plural_form) {
+  return internal::StreamableToString(count) + " " +
+      (count == 1 ? singular_form : plural_form);
+}
+
+// Formats the count of tests.
+static std::string FormatTestCount(int test_count) {
+  return FormatCountableNoun(test_count, "test", "tests");
+}
+
+// Formats the count of test suites.
+static std::string FormatTestSuiteCount(int test_suite_count) {
+  return FormatCountableNoun(test_suite_count, "test suite", "test suites");
+}
+
+// Converts a TestPartResult::Type enum to human-friendly string
+// representation.  Both kNonFatalFailure and kFatalFailure are translated
+// to "Failure", as the user usually doesn't care about the difference
+// between the two when viewing the test result.
+static const char * TestPartResultTypeToString(TestPartResult::Type type) {
+  switch (type) {
+    case TestPartResult::kSkip:
+      return "Skipped\n";
+    case TestPartResult::kSuccess:
+      return "Success";
+
+    case TestPartResult::kNonFatalFailure:
+    case TestPartResult::kFatalFailure:
+#ifdef _MSC_VER
+      return "error: ";
+#else
+      return "Failure\n";
+#endif
+    default:
+      return "Unknown result type";
+  }
+}
+
+namespace internal {
+namespace {
+enum class GTestColor { kDefault, kRed, kGreen, kYellow };
+}  // namespace
+
+// Prints a TestPartResult to an std::string.
+static std::string PrintTestPartResultToString(
+    const TestPartResult& test_part_result) {
+  return (Message()
+          << internal::FormatFileLocation(test_part_result.file_name(),
+                                          test_part_result.line_number())
+          << " " << TestPartResultTypeToString(test_part_result.type())
+          << test_part_result.message()).GetString();
+}
+
+// Prints a TestPartResult.
+static void PrintTestPartResult(const TestPartResult& test_part_result) {
+  const std::string& result =
+      PrintTestPartResultToString(test_part_result);
+  printf("%s\n", result.c_str());
+  fflush(stdout);
+  // If the test program runs in Visual Studio or a debugger, the
+  // following statements add the test part result message to the Output
+  // window such that the user can double-click on it to jump to the
+  // corresponding source code location; otherwise they do nothing.
+#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
+  // We don't call OutputDebugString*() on Windows Mobile, as printing
+  // to stdout is done by OutputDebugString() there already - we don't
+  // want the same message printed twice.
+  ::OutputDebugStringA(result.c_str());
+  ::OutputDebugStringA("\n");
+#endif
+}
+
+// class PrettyUnitTestResultPrinter
+#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
+    !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT && !GTEST_OS_WINDOWS_MINGW
+
+// Returns the character attribute for the given color.
+static WORD GetColorAttribute(GTestColor color) {
+  switch (color) {
+    case GTestColor::kRed:
+      return FOREGROUND_RED;
+    case GTestColor::kGreen:
+      return FOREGROUND_GREEN;
+    case GTestColor::kYellow:
+      return FOREGROUND_RED | FOREGROUND_GREEN;
+    default:           return 0;
+  }
+}
+
+static int GetBitOffset(WORD color_mask) {
+  if (color_mask == 0) return 0;
+
+  int bitOffset = 0;
+  while ((color_mask & 1) == 0) {
+    color_mask >>= 1;
+    ++bitOffset;
+  }
+  return bitOffset;
+}
+
+static WORD GetNewColor(GTestColor color, WORD old_color_attrs) {
+  // Let's reuse the BG
+  static const WORD background_mask = BACKGROUND_BLUE | BACKGROUND_GREEN |
+                                      BACKGROUND_RED | BACKGROUND_INTENSITY;
+  static const WORD foreground_mask = FOREGROUND_BLUE | FOREGROUND_GREEN |
+                                      FOREGROUND_RED | FOREGROUND_INTENSITY;
+  const WORD existing_bg = old_color_attrs & background_mask;
+
+  WORD new_color =
+      GetColorAttribute(color) | existing_bg | FOREGROUND_INTENSITY;
+  static const int bg_bitOffset = GetBitOffset(background_mask);
+  static const int fg_bitOffset = GetBitOffset(foreground_mask);
+
+  if (((new_color & background_mask) >> bg_bitOffset) ==
+      ((new_color & foreground_mask) >> fg_bitOffset)) {
+    new_color ^= FOREGROUND_INTENSITY;  // invert intensity
+  }
+  return new_color;
+}
+
+#else
+
+// Returns the ANSI color code for the given color. GTestColor::kDefault is
+// an invalid input.
+static const char* GetAnsiColorCode(GTestColor color) {
+  switch (color) {
+    case GTestColor::kRed:
+      return "1";
+    case GTestColor::kGreen:
+      return "2";
+    case GTestColor::kYellow:
+      return "3";
+    default:
+      return nullptr;
+  }
+}
+
+#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
+
+// Returns true if and only if Google Test should use colors in the output.
+bool ShouldUseColor(bool stdout_is_tty) {
+  const char* const gtest_color = GTEST_FLAG(color).c_str();
+
+  if (String::CaseInsensitiveCStringEquals(gtest_color, "auto")) {
+#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
+    // On Windows the TERM variable is usually not set, but the
+    // console there does support colors.
+    return stdout_is_tty;
+#else
+    // On non-Windows platforms, we rely on the TERM variable.
+    const char* const term = posix::GetEnv("TERM");
+    const bool term_supports_color =
+        String::CStringEquals(term, "xterm") ||
+        String::CStringEquals(term, "xterm-color") ||
+        String::CStringEquals(term, "xterm-256color") ||
+        String::CStringEquals(term, "screen") ||
+        String::CStringEquals(term, "screen-256color") ||
+        String::CStringEquals(term, "tmux") ||
+        String::CStringEquals(term, "tmux-256color") ||
+        String::CStringEquals(term, "rxvt-unicode") ||
+        String::CStringEquals(term, "rxvt-unicode-256color") ||
+        String::CStringEquals(term, "linux") ||
+        String::CStringEquals(term, "cygwin");
+    return stdout_is_tty && term_supports_color;
+#endif  // GTEST_OS_WINDOWS
+  }
+
+  return String::CaseInsensitiveCStringEquals(gtest_color, "yes") ||
+      String::CaseInsensitiveCStringEquals(gtest_color, "true") ||
+      String::CaseInsensitiveCStringEquals(gtest_color, "t") ||
+      String::CStringEquals(gtest_color, "1");
+  // We take "yes", "true", "t", and "1" as meaning "yes".  If the
+  // value is neither one of these nor "auto", we treat it as "no" to
+  // be conservative.
+}
+
+// Helpers for printing colored strings to stdout. Note that on Windows, we
+// cannot simply emit special characters and have the terminal change colors.
+// This routine must actually emit the characters rather than return a string
+// that would be colored when printed, as can be done on Linux.
+
+GTEST_ATTRIBUTE_PRINTF_(2, 3)
+static void ColoredPrintf(GTestColor color, const char *fmt, ...) {
+  va_list args;
+  va_start(args, fmt);
+
+#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_ZOS || GTEST_OS_IOS || \
+    GTEST_OS_WINDOWS_PHONE || GTEST_OS_WINDOWS_RT || defined(ESP_PLATFORM)
+  const bool use_color = AlwaysFalse();
+#else
+  static const bool in_color_mode =
+      ShouldUseColor(posix::IsATTY(posix::FileNo(stdout)) != 0);
+  const bool use_color = in_color_mode && (color != GTestColor::kDefault);
+#endif  // GTEST_OS_WINDOWS_MOBILE || GTEST_OS_ZOS
+
+  if (!use_color) {
+    vprintf(fmt, args);
+    va_end(args);
+    return;
+  }
+
+#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
+    !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT && !GTEST_OS_WINDOWS_MINGW
+  const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
+
+  // Gets the current text color.
+  CONSOLE_SCREEN_BUFFER_INFO buffer_info;
+  GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
+  const WORD old_color_attrs = buffer_info.wAttributes;
+  const WORD new_color = GetNewColor(color, old_color_attrs);
+
+  // We need to flush the stream buffers into the console before each
+  // SetConsoleTextAttribute call lest it affect the text that is already
+  // printed but has not yet reached the console.
+  fflush(stdout);
+  SetConsoleTextAttribute(stdout_handle, new_color);
+
+  vprintf(fmt, args);
+
+  fflush(stdout);
+  // Restores the text color.
+  SetConsoleTextAttribute(stdout_handle, old_color_attrs);
+#else
+  printf("\033[0;3%sm", GetAnsiColorCode(color));
+  vprintf(fmt, args);
+  printf("\033[m");  // Resets the terminal to default.
+#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
+  va_end(args);
+}
+
+// Text printed in Google Test's text output and --gtest_list_tests
+// output to label the type parameter and value parameter for a test.
+static const char kTypeParamLabel[] = "TypeParam";
+static const char kValueParamLabel[] = "GetParam()";
+
+static void PrintFullTestCommentIfPresent(const TestInfo& test_info) {
+  const char* const type_param = test_info.type_param();
+  const char* const value_param = test_info.value_param();
+
+  if (type_param != nullptr || value_param != nullptr) {
+    printf(", where ");
+    if (type_param != nullptr) {
+      printf("%s = %s", kTypeParamLabel, type_param);
+      if (value_param != nullptr) printf(" and ");
+    }
+    if (value_param != nullptr) {
+      printf("%s = %s", kValueParamLabel, value_param);
+    }
+  }
+}
+
+// This class implements the TestEventListener interface.
+//
+// Class PrettyUnitTestResultPrinter is copyable.
+class PrettyUnitTestResultPrinter : public TestEventListener {
+ public:
+  PrettyUnitTestResultPrinter() {}
+  static void PrintTestName(const char* test_suite, const char* test) {
+    printf("%s.%s", test_suite, test);
+  }
+
+  // The following methods override what's in the TestEventListener class.
+  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
+  void OnTestIterationStart(const UnitTest& unit_test, int iteration) override;
+  void OnEnvironmentsSetUpStart(const UnitTest& unit_test) override;
+  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  void OnTestCaseStart(const TestCase& test_case) override;
+#else
+  void OnTestSuiteStart(const TestSuite& test_suite) override;
+#endif  // OnTestCaseStart
+
+  void OnTestStart(const TestInfo& test_info) override;
+
+  void OnTestPartResult(const TestPartResult& result) override;
+  void OnTestEnd(const TestInfo& test_info) override;
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  void OnTestCaseEnd(const TestCase& test_case) override;
+#else
+  void OnTestSuiteEnd(const TestSuite& test_suite) override;
+#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  void OnEnvironmentsTearDownStart(const UnitTest& unit_test) override;
+  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
+  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
+  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
+
+ private:
+  static void PrintFailedTests(const UnitTest& unit_test);
+  static void PrintFailedTestSuites(const UnitTest& unit_test);
+  static void PrintSkippedTests(const UnitTest& unit_test);
+};
+
+  // Fired before each iteration of tests starts.
+void PrettyUnitTestResultPrinter::OnTestIterationStart(
+    const UnitTest& unit_test, int iteration) {
+  if (GTEST_FLAG(repeat) != 1)
+    printf("\nRepeating all tests (iteration %d) . . .\n\n", iteration + 1);
+
+  const char* const filter = GTEST_FLAG(filter).c_str();
+
+  // Prints the filter if it's not *.  This reminds the user that some
+  // tests may be skipped.
+  if (!String::CStringEquals(filter, kUniversalFilter)) {
+    ColoredPrintf(GTestColor::kYellow, "Note: %s filter = %s\n", GTEST_NAME_,
+                  filter);
+  }
+
+  if (internal::ShouldShard(kTestTotalShards, kTestShardIndex, false)) {
+    const int32_t shard_index = Int32FromEnvOrDie(kTestShardIndex, -1);
+    ColoredPrintf(GTestColor::kYellow, "Note: This is test shard %d of %s.\n",
+                  static_cast<int>(shard_index) + 1,
+                  internal::posix::GetEnv(kTestTotalShards));
+  }
+
+  if (GTEST_FLAG(shuffle)) {
+    ColoredPrintf(GTestColor::kYellow,
+                  "Note: Randomizing tests' orders with a seed of %d .\n",
+                  unit_test.random_seed());
+  }
+
+  ColoredPrintf(GTestColor::kGreen, "[==========] ");
+  printf("Running %s from %s.\n",
+         FormatTestCount(unit_test.test_to_run_count()).c_str(),
+         FormatTestSuiteCount(unit_test.test_suite_to_run_count()).c_str());
+  fflush(stdout);
+}
+
+void PrettyUnitTestResultPrinter::OnEnvironmentsSetUpStart(
+    const UnitTest& /*unit_test*/) {
+  ColoredPrintf(GTestColor::kGreen, "[----------] ");
+  printf("Global test environment set-up.\n");
+  fflush(stdout);
+}
+
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+void PrettyUnitTestResultPrinter::OnTestCaseStart(const TestCase& test_case) {
+  const std::string counts =
+      FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
+  ColoredPrintf(GTestColor::kGreen, "[----------] ");
+  printf("%s from %s", counts.c_str(), test_case.name());
+  if (test_case.type_param() == nullptr) {
+    printf("\n");
+  } else {
+    printf(", where %s = %s\n", kTypeParamLabel, test_case.type_param());
+  }
+  fflush(stdout);
+}
+#else
+void PrettyUnitTestResultPrinter::OnTestSuiteStart(
+    const TestSuite& test_suite) {
+  const std::string counts =
+      FormatCountableNoun(test_suite.test_to_run_count(), "test", "tests");
+  ColoredPrintf(GTestColor::kGreen, "[----------] ");
+  printf("%s from %s", counts.c_str(), test_suite.name());
+  if (test_suite.type_param() == nullptr) {
+    printf("\n");
+  } else {
+    printf(", where %s = %s\n", kTypeParamLabel, test_suite.type_param());
+  }
+  fflush(stdout);
+}
+#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+void PrettyUnitTestResultPrinter::OnTestStart(const TestInfo& test_info) {
+  ColoredPrintf(GTestColor::kGreen, "[ RUN      ] ");
+  PrintTestName(test_info.test_suite_name(), test_info.name());
+  printf("\n");
+  fflush(stdout);
+}
+
+// Called after an assertion failure.
+void PrettyUnitTestResultPrinter::OnTestPartResult(
+    const TestPartResult& result) {
+  switch (result.type()) {
+    // If the test part succeeded, we don't need to do anything.
+    case TestPartResult::kSuccess:
+      return;
+    default:
+      // Print failure message from the assertion
+      // (e.g. expected this and got that).
+      PrintTestPartResult(result);
+      fflush(stdout);
+  }
+}
+
+void PrettyUnitTestResultPrinter::OnTestEnd(const TestInfo& test_info) {
+  if (test_info.result()->Passed()) {
+    ColoredPrintf(GTestColor::kGreen, "[       OK ] ");
+  } else if (test_info.result()->Skipped()) {
+    ColoredPrintf(GTestColor::kGreen, "[  SKIPPED ] ");
+  } else {
+    ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
+  }
+  PrintTestName(test_info.test_suite_name(), test_info.name());
+  if (test_info.result()->Failed())
+    PrintFullTestCommentIfPresent(test_info);
+
+  if (GTEST_FLAG(print_time)) {
+    printf(" (%s ms)\n", internal::StreamableToString(
+           test_info.result()->elapsed_time()).c_str());
+  } else {
+    printf("\n");
+  }
+  fflush(stdout);
+}
+
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+void PrettyUnitTestResultPrinter::OnTestCaseEnd(const TestCase& test_case) {
+  if (!GTEST_FLAG(print_time)) return;
+
+  const std::string counts =
+      FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
+  ColoredPrintf(GTestColor::kGreen, "[----------] ");
+  printf("%s from %s (%s ms total)\n\n", counts.c_str(), test_case.name(),
+         internal::StreamableToString(test_case.elapsed_time()).c_str());
+  fflush(stdout);
+}
+#else
+void PrettyUnitTestResultPrinter::OnTestSuiteEnd(const TestSuite& test_suite) {
+  if (!GTEST_FLAG(print_time)) return;
+
+  const std::string counts =
+      FormatCountableNoun(test_suite.test_to_run_count(), "test", "tests");
+  ColoredPrintf(GTestColor::kGreen, "[----------] ");
+  printf("%s from %s (%s ms total)\n\n", counts.c_str(), test_suite.name(),
+         internal::StreamableToString(test_suite.elapsed_time()).c_str());
+  fflush(stdout);
+}
+#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+void PrettyUnitTestResultPrinter::OnEnvironmentsTearDownStart(
+    const UnitTest& /*unit_test*/) {
+  ColoredPrintf(GTestColor::kGreen, "[----------] ");
+  printf("Global test environment tear-down\n");
+  fflush(stdout);
+}
+
+// Internal helper for printing the list of failed tests.
+void PrettyUnitTestResultPrinter::PrintFailedTests(const UnitTest& unit_test) {
+  const int failed_test_count = unit_test.failed_test_count();
+  ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
+  printf("%s, listed below:\n", FormatTestCount(failed_test_count).c_str());
+
+  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
+    const TestSuite& test_suite = *unit_test.GetTestSuite(i);
+    if (!test_suite.should_run() || (test_suite.failed_test_count() == 0)) {
+      continue;
+    }
+    for (int j = 0; j < test_suite.total_test_count(); ++j) {
+      const TestInfo& test_info = *test_suite.GetTestInfo(j);
+      if (!test_info.should_run() || !test_info.result()->Failed()) {
+        continue;
+      }
+      ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
+      printf("%s.%s", test_suite.name(), test_info.name());
+      PrintFullTestCommentIfPresent(test_info);
+      printf("\n");
+    }
+  }
+  printf("\n%2d FAILED %s\n", failed_test_count,
+         failed_test_count == 1 ? "TEST" : "TESTS");
+}
+
+// Internal helper for printing the list of test suite failures not covered by
+// PrintFailedTests.
+void PrettyUnitTestResultPrinter::PrintFailedTestSuites(
+    const UnitTest& unit_test) {
+  int suite_failure_count = 0;
+  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
+    const TestSuite& test_suite = *unit_test.GetTestSuite(i);
+    if (!test_suite.should_run()) {
+      continue;
+    }
+    if (test_suite.ad_hoc_test_result().Failed()) {
+      ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
+      printf("%s: SetUpTestSuite or TearDownTestSuite\n", test_suite.name());
+      ++suite_failure_count;
+    }
+  }
+  if (suite_failure_count > 0) {
+    printf("\n%2d FAILED TEST %s\n", suite_failure_count,
+           suite_failure_count == 1 ? "SUITE" : "SUITES");
+  }
+}
+
+// Internal helper for printing the list of skipped tests.
+void PrettyUnitTestResultPrinter::PrintSkippedTests(const UnitTest& unit_test) {
+  const int skipped_test_count = unit_test.skipped_test_count();
+  if (skipped_test_count == 0) {
+    return;
+  }
+
+  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
+    const TestSuite& test_suite = *unit_test.GetTestSuite(i);
+    if (!test_suite.should_run() || (test_suite.skipped_test_count() == 0)) {
+      continue;
+    }
+    for (int j = 0; j < test_suite.total_test_count(); ++j) {
+      const TestInfo& test_info = *test_suite.GetTestInfo(j);
+      if (!test_info.should_run() || !test_info.result()->Skipped()) {
+        continue;
+      }
+      ColoredPrintf(GTestColor::kGreen, "[  SKIPPED ] ");
+      printf("%s.%s", test_suite.name(), test_info.name());
+      printf("\n");
+    }
+  }
+}
+
+void PrettyUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
+                                                     int /*iteration*/) {
+  ColoredPrintf(GTestColor::kGreen, "[==========] ");
+  printf("%s from %s ran.",
+         FormatTestCount(unit_test.test_to_run_count()).c_str(),
+         FormatTestSuiteCount(unit_test.test_suite_to_run_count()).c_str());
+  if (GTEST_FLAG(print_time)) {
+    printf(" (%s ms total)",
+           internal::StreamableToString(unit_test.elapsed_time()).c_str());
+  }
+  printf("\n");
+  ColoredPrintf(GTestColor::kGreen, "[  PASSED  ] ");
+  printf("%s.\n", FormatTestCount(unit_test.successful_test_count()).c_str());
+
+  const int skipped_test_count = unit_test.skipped_test_count();
+  if (skipped_test_count > 0) {
+    ColoredPrintf(GTestColor::kGreen, "[  SKIPPED ] ");
+    printf("%s, listed below:\n", FormatTestCount(skipped_test_count).c_str());
+    PrintSkippedTests(unit_test);
+  }
+
+  if (!unit_test.Passed()) {
+    PrintFailedTests(unit_test);
+    PrintFailedTestSuites(unit_test);
+  }
+
+  int num_disabled = unit_test.reportable_disabled_test_count();
+  if (num_disabled && !GTEST_FLAG(also_run_disabled_tests)) {
+    if (unit_test.Passed()) {
+      printf("\n");  // Add a spacer if no FAILURE banner is displayed.
+    }
+    ColoredPrintf(GTestColor::kYellow, "  YOU HAVE %d DISABLED %s\n\n",
+                  num_disabled, num_disabled == 1 ? "TEST" : "TESTS");
+  }
+  // Ensure that Google Test output is printed before, e.g., heapchecker output.
+  fflush(stdout);
+}
+
+// End PrettyUnitTestResultPrinter
+
+// This class implements the TestEventListener interface.
+//
+// Class BriefUnitTestResultPrinter is copyable.
+class BriefUnitTestResultPrinter : public TestEventListener {
+ public:
+  BriefUnitTestResultPrinter() {}
+  static void PrintTestName(const char* test_suite, const char* test) {
+    printf("%s.%s", test_suite, test);
+  }
+
+  // The following methods override what's in the TestEventListener class.
+  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
+  void OnTestIterationStart(const UnitTest& /*unit_test*/,
+                            int /*iteration*/) override {}
+  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {}
+  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  void OnTestCaseStart(const TestCase& /*test_case*/) override {}
+#else
+  void OnTestSuiteStart(const TestSuite& /*test_suite*/) override {}
+#endif  // OnTestCaseStart
+
+  void OnTestStart(const TestInfo& /*test_info*/) override {}
+
+  void OnTestPartResult(const TestPartResult& result) override;
+  void OnTestEnd(const TestInfo& test_info) override;
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  void OnTestCaseEnd(const TestCase& /*test_case*/) override {}
+#else
+  void OnTestSuiteEnd(const TestSuite& /*test_suite*/) override {}
+#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {}
+  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
+  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
+  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
+};
+
+// Called after an assertion failure.
+void BriefUnitTestResultPrinter::OnTestPartResult(
+    const TestPartResult& result) {
+  switch (result.type()) {
+    // If the test part succeeded, we don't need to do anything.
+    case TestPartResult::kSuccess:
+      return;
+    default:
+      // Print failure message from the assertion
+      // (e.g. expected this and got that).
+      PrintTestPartResult(result);
+      fflush(stdout);
+  }
+}
+
+void BriefUnitTestResultPrinter::OnTestEnd(const TestInfo& test_info) {
+  if (test_info.result()->Failed()) {
+    ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
+    PrintTestName(test_info.test_suite_name(), test_info.name());
+    PrintFullTestCommentIfPresent(test_info);
+
+    if (GTEST_FLAG(print_time)) {
+      printf(" (%s ms)\n",
+             internal::StreamableToString(test_info.result()->elapsed_time())
+                 .c_str());
+    } else {
+      printf("\n");
+    }
+    fflush(stdout);
+  }
+}
+
+void BriefUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
+                                                    int /*iteration*/) {
+  ColoredPrintf(GTestColor::kGreen, "[==========] ");
+  printf("%s from %s ran.",
+         FormatTestCount(unit_test.test_to_run_count()).c_str(),
+         FormatTestSuiteCount(unit_test.test_suite_to_run_count()).c_str());
+  if (GTEST_FLAG(print_time)) {
+    printf(" (%s ms total)",
+           internal::StreamableToString(unit_test.elapsed_time()).c_str());
+  }
+  printf("\n");
+  ColoredPrintf(GTestColor::kGreen, "[  PASSED  ] ");
+  printf("%s.\n", FormatTestCount(unit_test.successful_test_count()).c_str());
+
+  const int skipped_test_count = unit_test.skipped_test_count();
+  if (skipped_test_count > 0) {
+    ColoredPrintf(GTestColor::kGreen, "[  SKIPPED ] ");
+    printf("%s.\n", FormatTestCount(skipped_test_count).c_str());
+  }
+
+  int num_disabled = unit_test.reportable_disabled_test_count();
+  if (num_disabled && !GTEST_FLAG(also_run_disabled_tests)) {
+    if (unit_test.Passed()) {
+      printf("\n");  // Add a spacer if no FAILURE banner is displayed.
+    }
+    ColoredPrintf(GTestColor::kYellow, "  YOU HAVE %d DISABLED %s\n\n",
+                  num_disabled, num_disabled == 1 ? "TEST" : "TESTS");
+  }
+  // Ensure that Google Test output is printed before, e.g., heapchecker output.
+  fflush(stdout);
+}
+
+// End BriefUnitTestResultPrinter
+
+// class TestEventRepeater
+//
+// This class forwards events to other event listeners.
+class TestEventRepeater : public TestEventListener {
+ public:
+  TestEventRepeater() : forwarding_enabled_(true) {}
+  ~TestEventRepeater() override;
+  void Append(TestEventListener *listener);
+  TestEventListener* Release(TestEventListener* listener);
+
+  // Controls whether events will be forwarded to listeners_. Set to false
+  // in death test child processes.
+  bool forwarding_enabled() const { return forwarding_enabled_; }
+  void set_forwarding_enabled(bool enable) { forwarding_enabled_ = enable; }
+
+  void OnTestProgramStart(const UnitTest& unit_test) override;
+  void OnTestIterationStart(const UnitTest& unit_test, int iteration) override;
+  void OnEnvironmentsSetUpStart(const UnitTest& unit_test) override;
+  void OnEnvironmentsSetUpEnd(const UnitTest& unit_test) override;
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  void OnTestCaseStart(const TestSuite& parameter) override;
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  void OnTestSuiteStart(const TestSuite& parameter) override;
+  void OnTestStart(const TestInfo& test_info) override;
+  void OnTestPartResult(const TestPartResult& result) override;
+  void OnTestEnd(const TestInfo& test_info) override;
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  void OnTestCaseEnd(const TestCase& parameter) override;
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  void OnTestSuiteEnd(const TestSuite& parameter) override;
+  void OnEnvironmentsTearDownStart(const UnitTest& unit_test) override;
+  void OnEnvironmentsTearDownEnd(const UnitTest& unit_test) override;
+  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
+  void OnTestProgramEnd(const UnitTest& unit_test) override;
+
+ private:
+  // Controls whether events will be forwarded to listeners_. Set to false
+  // in death test child processes.
+  bool forwarding_enabled_;
+  // The list of listeners that receive events.
+  std::vector<TestEventListener*> listeners_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventRepeater);
+};
+
+TestEventRepeater::~TestEventRepeater() {
+  ForEach(listeners_, Delete<TestEventListener>);
+}
+
+void TestEventRepeater::Append(TestEventListener *listener) {
+  listeners_.push_back(listener);
+}
+
+TestEventListener* TestEventRepeater::Release(TestEventListener *listener) {
+  for (size_t i = 0; i < listeners_.size(); ++i) {
+    if (listeners_[i] == listener) {
+      listeners_.erase(listeners_.begin() + static_cast<int>(i));
+      return listener;
+    }
+  }
+
+  return nullptr;
+}
+
+// Since most methods are very similar, use macros to reduce boilerplate.
+// This defines a member that forwards the call to all listeners.
+#define GTEST_REPEATER_METHOD_(Name, Type) \
+void TestEventRepeater::Name(const Type& parameter) { \
+  if (forwarding_enabled_) { \
+    for (size_t i = 0; i < listeners_.size(); i++) { \
+      listeners_[i]->Name(parameter); \
+    } \
+  } \
+}
+// This defines a member that forwards the call to all listeners in reverse
+// order.
+#define GTEST_REVERSE_REPEATER_METHOD_(Name, Type)      \
+  void TestEventRepeater::Name(const Type& parameter) { \
+    if (forwarding_enabled_) {                          \
+      for (size_t i = listeners_.size(); i != 0; i--) { \
+        listeners_[i - 1]->Name(parameter);             \
+      }                                                 \
+    }                                                   \
+  }
+
+GTEST_REPEATER_METHOD_(OnTestProgramStart, UnitTest)
+GTEST_REPEATER_METHOD_(OnEnvironmentsSetUpStart, UnitTest)
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+GTEST_REPEATER_METHOD_(OnTestCaseStart, TestSuite)
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+GTEST_REPEATER_METHOD_(OnTestSuiteStart, TestSuite)
+GTEST_REPEATER_METHOD_(OnTestStart, TestInfo)
+GTEST_REPEATER_METHOD_(OnTestPartResult, TestPartResult)
+GTEST_REPEATER_METHOD_(OnEnvironmentsTearDownStart, UnitTest)
+GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsSetUpEnd, UnitTest)
+GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsTearDownEnd, UnitTest)
+GTEST_REVERSE_REPEATER_METHOD_(OnTestEnd, TestInfo)
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+GTEST_REVERSE_REPEATER_METHOD_(OnTestCaseEnd, TestSuite)
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+GTEST_REVERSE_REPEATER_METHOD_(OnTestSuiteEnd, TestSuite)
+GTEST_REVERSE_REPEATER_METHOD_(OnTestProgramEnd, UnitTest)
+
+#undef GTEST_REPEATER_METHOD_
+#undef GTEST_REVERSE_REPEATER_METHOD_
+
+void TestEventRepeater::OnTestIterationStart(const UnitTest& unit_test,
+                                             int iteration) {
+  if (forwarding_enabled_) {
+    for (size_t i = 0; i < listeners_.size(); i++) {
+      listeners_[i]->OnTestIterationStart(unit_test, iteration);
+    }
+  }
+}
+
+void TestEventRepeater::OnTestIterationEnd(const UnitTest& unit_test,
+                                           int iteration) {
+  if (forwarding_enabled_) {
+    for (size_t i = listeners_.size(); i > 0; i--) {
+      listeners_[i - 1]->OnTestIterationEnd(unit_test, iteration);
+    }
+  }
+}
+
+// End TestEventRepeater
+
+// This class generates an XML output file.
+class XmlUnitTestResultPrinter : public EmptyTestEventListener {
+ public:
+  explicit XmlUnitTestResultPrinter(const char* output_file);
+
+  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
+  void ListTestsMatchingFilter(const std::vector<TestSuite*>& test_suites);
+
+  // Prints an XML summary of all unit tests.
+  static void PrintXmlTestsList(std::ostream* stream,
+                                const std::vector<TestSuite*>& test_suites);
+
+ private:
+  // Is c a whitespace character that is normalized to a space character
+  // when it appears in an XML attribute value?
+  static bool IsNormalizableWhitespace(char c) {
+    return c == 0x9 || c == 0xA || c == 0xD;
+  }
+
+  // May c appear in a well-formed XML document?
+  static bool IsValidXmlCharacter(char c) {
+    return IsNormalizableWhitespace(c) || c >= 0x20;
+  }
+
+  // Returns an XML-escaped copy of the input string str.  If
+  // is_attribute is true, the text is meant to appear as an attribute
+  // value, and normalizable whitespace is preserved by replacing it
+  // with character references.
+  static std::string EscapeXml(const std::string& str, bool is_attribute);
+
+  // Returns the given string with all characters invalid in XML removed.
+  static std::string RemoveInvalidXmlCharacters(const std::string& str);
+
+  // Convenience wrapper around EscapeXml when str is an attribute value.
+  static std::string EscapeXmlAttribute(const std::string& str) {
+    return EscapeXml(str, true);
+  }
+
+  // Convenience wrapper around EscapeXml when str is not an attribute value.
+  static std::string EscapeXmlText(const char* str) {
+    return EscapeXml(str, false);
+  }
+
+  // Verifies that the given attribute belongs to the given element and
+  // streams the attribute as XML.
+  static void OutputXmlAttribute(std::ostream* stream,
+                                 const std::string& element_name,
+                                 const std::string& name,
+                                 const std::string& value);
+
+  // Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
+  static void OutputXmlCDataSection(::std::ostream* stream, const char* data);
+
+  // Streams a test suite XML stanza containing the given test result.
+  //
+  // Requires: result.Failed()
+  static void OutputXmlTestSuiteForTestResult(::std::ostream* stream,
+                                              const TestResult& result);
+
+  // Streams an XML representation of a TestResult object.
+  static void OutputXmlTestResult(::std::ostream* stream,
+                                  const TestResult& result);
+
+  // Streams an XML representation of a TestInfo object.
+  static void OutputXmlTestInfo(::std::ostream* stream,
+                                const char* test_suite_name,
+                                const TestInfo& test_info);
+
+  // Prints an XML representation of a TestSuite object
+  static void PrintXmlTestSuite(::std::ostream* stream,
+                                const TestSuite& test_suite);
+
+  // Prints an XML summary of unit_test to output stream out.
+  static void PrintXmlUnitTest(::std::ostream* stream,
+                               const UnitTest& unit_test);
+
+  // Produces a string representing the test properties in a result as space
+  // delimited XML attributes based on the property key="value" pairs.
+  // When the std::string is not empty, it includes a space at the beginning,
+  // to delimit this attribute from prior attributes.
+  static std::string TestPropertiesAsXmlAttributes(const TestResult& result);
+
+  // Streams an XML representation of the test properties of a TestResult
+  // object.
+  static void OutputXmlTestProperties(std::ostream* stream,
+                                      const TestResult& result);
+
+  // The output file.
+  const std::string output_file_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(XmlUnitTestResultPrinter);
+};
+
+// Creates a new XmlUnitTestResultPrinter.
+XmlUnitTestResultPrinter::XmlUnitTestResultPrinter(const char* output_file)
+    : output_file_(output_file) {
+  if (output_file_.empty()) {
+    GTEST_LOG_(FATAL) << "XML output file may not be null";
+  }
+}
+
+// Called after the unit test ends.
+void XmlUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
+                                                  int /*iteration*/) {
+  FILE* xmlout = OpenFileForWriting(output_file_);
+  std::stringstream stream;
+  PrintXmlUnitTest(&stream, unit_test);
+  fprintf(xmlout, "%s", StringStreamToString(&stream).c_str());
+  fclose(xmlout);
+}
+
+void XmlUnitTestResultPrinter::ListTestsMatchingFilter(
+    const std::vector<TestSuite*>& test_suites) {
+  FILE* xmlout = OpenFileForWriting(output_file_);
+  std::stringstream stream;
+  PrintXmlTestsList(&stream, test_suites);
+  fprintf(xmlout, "%s", StringStreamToString(&stream).c_str());
+  fclose(xmlout);
+}
+
+// Returns an XML-escaped copy of the input string str.  If is_attribute
+// is true, the text is meant to appear as an attribute value, and
+// normalizable whitespace is preserved by replacing it with character
+// references.
+//
+// Invalid XML characters in str, if any, are stripped from the output.
+// It is expected that most, if not all, of the text processed by this
+// module will consist of ordinary English text.
+// If this module is ever modified to produce version 1.1 XML output,
+// most invalid characters can be retained using character references.
+std::string XmlUnitTestResultPrinter::EscapeXml(
+    const std::string& str, bool is_attribute) {
+  Message m;
+
+  for (size_t i = 0; i < str.size(); ++i) {
+    const char ch = str[i];
+    switch (ch) {
+      case '<':
+        m << "&lt;";
+        break;
+      case '>':
+        m << "&gt;";
+        break;
+      case '&':
+        m << "&amp;";
+        break;
+      case '\'':
+        if (is_attribute)
+          m << "&apos;";
+        else
+          m << '\'';
+        break;
+      case '"':
+        if (is_attribute)
+          m << "&quot;";
+        else
+          m << '"';
+        break;
+      default:
+        if (IsValidXmlCharacter(ch)) {
+          if (is_attribute && IsNormalizableWhitespace(ch))
+            m << "&#x" << String::FormatByte(static_cast<unsigned char>(ch))
+              << ";";
+          else
+            m << ch;
+        }
+        break;
+    }
+  }
+
+  return m.GetString();
+}
+
+// Returns the given string with all characters invalid in XML removed.
+// Currently invalid characters are dropped from the string. An
+// alternative is to replace them with certain characters such as . or ?.
+std::string XmlUnitTestResultPrinter::RemoveInvalidXmlCharacters(
+    const std::string& str) {
+  std::string output;
+  output.reserve(str.size());
+  for (std::string::const_iterator it = str.begin(); it != str.end(); ++it)
+    if (IsValidXmlCharacter(*it))
+      output.push_back(*it);
+
+  return output;
+}
+
+// The following routines generate an XML representation of a UnitTest
+// object.
+// GOOGLETEST_CM0009 DO NOT DELETE
+//
+// This is how Google Test concepts map to the DTD:
+//
+// <testsuites name="AllTests">        <-- corresponds to a UnitTest object
+//   <testsuite name="testcase-name">  <-- corresponds to a TestSuite object
+//     <testcase name="test-name">     <-- corresponds to a TestInfo object
+//       <failure message="...">...</failure>
+//       <failure message="...">...</failure>
+//       <failure message="...">...</failure>
+//                                     <-- individual assertion failures
+//     </testcase>
+//   </testsuite>
+// </testsuites>
+
+// Formats the given time in milliseconds as seconds.
+std::string FormatTimeInMillisAsSeconds(TimeInMillis ms) {
+  ::std::stringstream ss;
+  ss << (static_cast<double>(ms) * 1e-3);
+  return ss.str();
+}
+
+static bool PortableLocaltime(time_t seconds, struct tm* out) {
+#if defined(_MSC_VER)
+  return localtime_s(out, &seconds) == 0;
+#elif defined(__MINGW32__) || defined(__MINGW64__)
+  // MINGW <time.h> provides neither localtime_r nor localtime_s, but uses
+  // Windows' localtime(), which has a thread-local tm buffer.
+  struct tm* tm_ptr = localtime(&seconds);  // NOLINT
+  if (tm_ptr == nullptr) return false;
+  *out = *tm_ptr;
+  return true;
+#elif defined(__STDC_LIB_EXT1__)
+  // Uses localtime_s when available as localtime_r is only available from
+  // C23 standard.
+  return localtime_s(&seconds, out) != nullptr;
+#else
+  return localtime_r(&seconds, out) != nullptr;
+#endif
+}
+
+// Converts the given epoch time in milliseconds to a date string in the ISO
+// 8601 format, without the timezone information.
+std::string FormatEpochTimeInMillisAsIso8601(TimeInMillis ms) {
+  struct tm time_struct;
+  if (!PortableLocaltime(static_cast<time_t>(ms / 1000), &time_struct))
+    return "";
+  // YYYY-MM-DDThh:mm:ss.sss
+  return StreamableToString(time_struct.tm_year + 1900) + "-" +
+      String::FormatIntWidth2(time_struct.tm_mon + 1) + "-" +
+      String::FormatIntWidth2(time_struct.tm_mday) + "T" +
+      String::FormatIntWidth2(time_struct.tm_hour) + ":" +
+      String::FormatIntWidth2(time_struct.tm_min) + ":" +
+      String::FormatIntWidth2(time_struct.tm_sec) + "." +
+      String::FormatIntWidthN(static_cast<int>(ms % 1000), 3);
+}
+
+// Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
+void XmlUnitTestResultPrinter::OutputXmlCDataSection(::std::ostream* stream,
+                                                     const char* data) {
+  const char* segment = data;
+  *stream << "<![CDATA[";
+  for (;;) {
+    const char* const next_segment = strstr(segment, "]]>");
+    if (next_segment != nullptr) {
+      stream->write(
+          segment, static_cast<std::streamsize>(next_segment - segment));
+      *stream << "]]>]]&gt;<![CDATA[";
+      segment = next_segment + strlen("]]>");
+    } else {
+      *stream << segment;
+      break;
+    }
+  }
+  *stream << "]]>";
+}
+
+void XmlUnitTestResultPrinter::OutputXmlAttribute(
+    std::ostream* stream,
+    const std::string& element_name,
+    const std::string& name,
+    const std::string& value) {
+  const std::vector<std::string>& allowed_names =
+      GetReservedOutputAttributesForElement(element_name);
+
+  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
+                   allowed_names.end())
+      << "Attribute " << name << " is not allowed for element <" << element_name
+      << ">.";
+
+  *stream << " " << name << "=\"" << EscapeXmlAttribute(value) << "\"";
+}
+
+// Streams a test suite XML stanza containing the given test result.
+void XmlUnitTestResultPrinter::OutputXmlTestSuiteForTestResult(
+    ::std::ostream* stream, const TestResult& result) {
+  // Output the boilerplate for a minimal test suite with one test.
+  *stream << "  <testsuite";
+  OutputXmlAttribute(stream, "testsuite", "name", "NonTestSuiteFailure");
+  OutputXmlAttribute(stream, "testsuite", "tests", "1");
+  OutputXmlAttribute(stream, "testsuite", "failures", "1");
+  OutputXmlAttribute(stream, "testsuite", "disabled", "0");
+  OutputXmlAttribute(stream, "testsuite", "skipped", "0");
+  OutputXmlAttribute(stream, "testsuite", "errors", "0");
+  OutputXmlAttribute(stream, "testsuite", "time",
+                     FormatTimeInMillisAsSeconds(result.elapsed_time()));
+  OutputXmlAttribute(
+      stream, "testsuite", "timestamp",
+      FormatEpochTimeInMillisAsIso8601(result.start_timestamp()));
+  *stream << ">";
+
+  // Output the boilerplate for a minimal test case with a single test.
+  *stream << "    <testcase";
+  OutputXmlAttribute(stream, "testcase", "name", "");
+  OutputXmlAttribute(stream, "testcase", "status", "run");
+  OutputXmlAttribute(stream, "testcase", "result", "completed");
+  OutputXmlAttribute(stream, "testcase", "classname", "");
+  OutputXmlAttribute(stream, "testcase", "time",
+                     FormatTimeInMillisAsSeconds(result.elapsed_time()));
+  OutputXmlAttribute(
+      stream, "testcase", "timestamp",
+      FormatEpochTimeInMillisAsIso8601(result.start_timestamp()));
+
+  // Output the actual test result.
+  OutputXmlTestResult(stream, result);
+
+  // Complete the test suite.
+  *stream << "  </testsuite>\n";
+}
+
+// Prints an XML representation of a TestInfo object.
+void XmlUnitTestResultPrinter::OutputXmlTestInfo(::std::ostream* stream,
+                                                 const char* test_suite_name,
+                                                 const TestInfo& test_info) {
+  const TestResult& result = *test_info.result();
+  const std::string kTestsuite = "testcase";
+
+  if (test_info.is_in_another_shard()) {
+    return;
+  }
+
+  *stream << "    <testcase";
+  OutputXmlAttribute(stream, kTestsuite, "name", test_info.name());
+
+  if (test_info.value_param() != nullptr) {
+    OutputXmlAttribute(stream, kTestsuite, "value_param",
+                       test_info.value_param());
+  }
+  if (test_info.type_param() != nullptr) {
+    OutputXmlAttribute(stream, kTestsuite, "type_param",
+                       test_info.type_param());
+  }
+  if (GTEST_FLAG(list_tests)) {
+    OutputXmlAttribute(stream, kTestsuite, "file", test_info.file());
+    OutputXmlAttribute(stream, kTestsuite, "line",
+                       StreamableToString(test_info.line()));
+    *stream << " />\n";
+    return;
+  }
+
+  OutputXmlAttribute(stream, kTestsuite, "status",
+                     test_info.should_run() ? "run" : "notrun");
+  OutputXmlAttribute(stream, kTestsuite, "result",
+                     test_info.should_run()
+                         ? (result.Skipped() ? "skipped" : "completed")
+                         : "suppressed");
+  OutputXmlAttribute(stream, kTestsuite, "time",
+                     FormatTimeInMillisAsSeconds(result.elapsed_time()));
+  OutputXmlAttribute(
+      stream, kTestsuite, "timestamp",
+      FormatEpochTimeInMillisAsIso8601(result.start_timestamp()));
+  OutputXmlAttribute(stream, kTestsuite, "classname", test_suite_name);
+
+  OutputXmlTestResult(stream, result);
+}
+
+void XmlUnitTestResultPrinter::OutputXmlTestResult(::std::ostream* stream,
+                                                   const TestResult& result) {
+  int failures = 0;
+  int skips = 0;
+  for (int i = 0; i < result.total_part_count(); ++i) {
+    const TestPartResult& part = result.GetTestPartResult(i);
+    if (part.failed()) {
+      if (++failures == 1 && skips == 0) {
+        *stream << ">\n";
+      }
+      const std::string location =
+          internal::FormatCompilerIndependentFileLocation(part.file_name(),
+                                                          part.line_number());
+      const std::string summary = location + "\n" + part.summary();
+      *stream << "      <failure message=\""
+              << EscapeXmlAttribute(summary)
+              << "\" type=\"\">";
+      const std::string detail = location + "\n" + part.message();
+      OutputXmlCDataSection(stream, RemoveInvalidXmlCharacters(detail).c_str());
+      *stream << "</failure>\n";
+    } else if (part.skipped()) {
+      if (++skips == 1 && failures == 0) {
+        *stream << ">\n";
+      }
+      const std::string location =
+          internal::FormatCompilerIndependentFileLocation(part.file_name(),
+                                                          part.line_number());
+      const std::string summary = location + "\n" + part.summary();
+      *stream << "      <skipped message=\""
+              << EscapeXmlAttribute(summary.c_str()) << "\">";
+      const std::string detail = location + "\n" + part.message();
+      OutputXmlCDataSection(stream, RemoveInvalidXmlCharacters(detail).c_str());
+      *stream << "</skipped>\n";
+    }
+  }
+
+  if (failures == 0 && skips == 0 && result.test_property_count() == 0) {
+    *stream << " />\n";
+  } else {
+    if (failures == 0 && skips == 0) {
+      *stream << ">\n";
+    }
+    OutputXmlTestProperties(stream, result);
+    *stream << "    </testcase>\n";
+  }
+}
+
+// Prints an XML representation of a TestSuite object
+void XmlUnitTestResultPrinter::PrintXmlTestSuite(std::ostream* stream,
+                                                 const TestSuite& test_suite) {
+  const std::string kTestsuite = "testsuite";
+  *stream << "  <" << kTestsuite;
+  OutputXmlAttribute(stream, kTestsuite, "name", test_suite.name());
+  OutputXmlAttribute(stream, kTestsuite, "tests",
+                     StreamableToString(test_suite.reportable_test_count()));
+  if (!GTEST_FLAG(list_tests)) {
+    OutputXmlAttribute(stream, kTestsuite, "failures",
+                       StreamableToString(test_suite.failed_test_count()));
+    OutputXmlAttribute(
+        stream, kTestsuite, "disabled",
+        StreamableToString(test_suite.reportable_disabled_test_count()));
+    OutputXmlAttribute(stream, kTestsuite, "skipped",
+                       StreamableToString(test_suite.skipped_test_count()));
+
+    OutputXmlAttribute(stream, kTestsuite, "errors", "0");
+
+    OutputXmlAttribute(stream, kTestsuite, "time",
+                       FormatTimeInMillisAsSeconds(test_suite.elapsed_time()));
+    OutputXmlAttribute(
+        stream, kTestsuite, "timestamp",
+        FormatEpochTimeInMillisAsIso8601(test_suite.start_timestamp()));
+    *stream << TestPropertiesAsXmlAttributes(test_suite.ad_hoc_test_result());
+  }
+  *stream << ">\n";
+  for (int i = 0; i < test_suite.total_test_count(); ++i) {
+    if (test_suite.GetTestInfo(i)->is_reportable())
+      OutputXmlTestInfo(stream, test_suite.name(), *test_suite.GetTestInfo(i));
+  }
+  *stream << "  </" << kTestsuite << ">\n";
+}
+
+// Prints an XML summary of unit_test to output stream out.
+void XmlUnitTestResultPrinter::PrintXmlUnitTest(std::ostream* stream,
+                                                const UnitTest& unit_test) {
+  const std::string kTestsuites = "testsuites";
+
+  *stream << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
+  *stream << "<" << kTestsuites;
+
+  OutputXmlAttribute(stream, kTestsuites, "tests",
+                     StreamableToString(unit_test.reportable_test_count()));
+  OutputXmlAttribute(stream, kTestsuites, "failures",
+                     StreamableToString(unit_test.failed_test_count()));
+  OutputXmlAttribute(
+      stream, kTestsuites, "disabled",
+      StreamableToString(unit_test.reportable_disabled_test_count()));
+  OutputXmlAttribute(stream, kTestsuites, "errors", "0");
+  OutputXmlAttribute(stream, kTestsuites, "time",
+                     FormatTimeInMillisAsSeconds(unit_test.elapsed_time()));
+  OutputXmlAttribute(
+      stream, kTestsuites, "timestamp",
+      FormatEpochTimeInMillisAsIso8601(unit_test.start_timestamp()));
+
+  if (GTEST_FLAG(shuffle)) {
+    OutputXmlAttribute(stream, kTestsuites, "random_seed",
+                       StreamableToString(unit_test.random_seed()));
+  }
+  *stream << TestPropertiesAsXmlAttributes(unit_test.ad_hoc_test_result());
+
+  OutputXmlAttribute(stream, kTestsuites, "name", "AllTests");
+  *stream << ">\n";
+
+  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
+    if (unit_test.GetTestSuite(i)->reportable_test_count() > 0)
+      PrintXmlTestSuite(stream, *unit_test.GetTestSuite(i));
+  }
+
+  // If there was a test failure outside of one of the test suites (like in a
+  // test environment) include that in the output.
+  if (unit_test.ad_hoc_test_result().Failed()) {
+    OutputXmlTestSuiteForTestResult(stream, unit_test.ad_hoc_test_result());
+  }
+
+  *stream << "</" << kTestsuites << ">\n";
+}
+
+void XmlUnitTestResultPrinter::PrintXmlTestsList(
+    std::ostream* stream, const std::vector<TestSuite*>& test_suites) {
+  const std::string kTestsuites = "testsuites";
+
+  *stream << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
+  *stream << "<" << kTestsuites;
+
+  int total_tests = 0;
+  for (auto test_suite : test_suites) {
+    total_tests += test_suite->total_test_count();
+  }
+  OutputXmlAttribute(stream, kTestsuites, "tests",
+                     StreamableToString(total_tests));
+  OutputXmlAttribute(stream, kTestsuites, "name", "AllTests");
+  *stream << ">\n";
+
+  for (auto test_suite : test_suites) {
+    PrintXmlTestSuite(stream, *test_suite);
+  }
+  *stream << "</" << kTestsuites << ">\n";
+}
+
+// Produces a string representing the test properties in a result as space
+// delimited XML attributes based on the property key="value" pairs.
+std::string XmlUnitTestResultPrinter::TestPropertiesAsXmlAttributes(
+    const TestResult& result) {
+  Message attributes;
+  for (int i = 0; i < result.test_property_count(); ++i) {
+    const TestProperty& property = result.GetTestProperty(i);
+    attributes << " " << property.key() << "="
+        << "\"" << EscapeXmlAttribute(property.value()) << "\"";
+  }
+  return attributes.GetString();
+}
+
+void XmlUnitTestResultPrinter::OutputXmlTestProperties(
+    std::ostream* stream, const TestResult& result) {
+  const std::string kProperties = "properties";
+  const std::string kProperty = "property";
+
+  if (result.test_property_count() <= 0) {
+    return;
+  }
+
+  *stream << "<" << kProperties << ">\n";
+  for (int i = 0; i < result.test_property_count(); ++i) {
+    const TestProperty& property = result.GetTestProperty(i);
+    *stream << "<" << kProperty;
+    *stream << " name=\"" << EscapeXmlAttribute(property.key()) << "\"";
+    *stream << " value=\"" << EscapeXmlAttribute(property.value()) << "\"";
+    *stream << "/>\n";
+  }
+  *stream << "</" << kProperties << ">\n";
+}
+
+// End XmlUnitTestResultPrinter
+
+// This class generates an JSON output file.
+class JsonUnitTestResultPrinter : public EmptyTestEventListener {
+ public:
+  explicit JsonUnitTestResultPrinter(const char* output_file);
+
+  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
+
+  // Prints an JSON summary of all unit tests.
+  static void PrintJsonTestList(::std::ostream* stream,
+                                const std::vector<TestSuite*>& test_suites);
+
+ private:
+  // Returns an JSON-escaped copy of the input string str.
+  static std::string EscapeJson(const std::string& str);
+
+  //// Verifies that the given attribute belongs to the given element and
+  //// streams the attribute as JSON.
+  static void OutputJsonKey(std::ostream* stream,
+                            const std::string& element_name,
+                            const std::string& name,
+                            const std::string& value,
+                            const std::string& indent,
+                            bool comma = true);
+  static void OutputJsonKey(std::ostream* stream,
+                            const std::string& element_name,
+                            const std::string& name,
+                            int value,
+                            const std::string& indent,
+                            bool comma = true);
+
+  // Streams a test suite JSON stanza containing the given test result.
+  //
+  // Requires: result.Failed()
+  static void OutputJsonTestSuiteForTestResult(::std::ostream* stream,
+                                               const TestResult& result);
+
+  // Streams a JSON representation of a TestResult object.
+  static void OutputJsonTestResult(::std::ostream* stream,
+                                   const TestResult& result);
+
+  // Streams a JSON representation of a TestInfo object.
+  static void OutputJsonTestInfo(::std::ostream* stream,
+                                 const char* test_suite_name,
+                                 const TestInfo& test_info);
+
+  // Prints a JSON representation of a TestSuite object
+  static void PrintJsonTestSuite(::std::ostream* stream,
+                                 const TestSuite& test_suite);
+
+  // Prints a JSON summary of unit_test to output stream out.
+  static void PrintJsonUnitTest(::std::ostream* stream,
+                                const UnitTest& unit_test);
+
+  // Produces a string representing the test properties in a result as
+  // a JSON dictionary.
+  static std::string TestPropertiesAsJson(const TestResult& result,
+                                          const std::string& indent);
+
+  // The output file.
+  const std::string output_file_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(JsonUnitTestResultPrinter);
+};
+
+// Creates a new JsonUnitTestResultPrinter.
+JsonUnitTestResultPrinter::JsonUnitTestResultPrinter(const char* output_file)
+    : output_file_(output_file) {
+  if (output_file_.empty()) {
+    GTEST_LOG_(FATAL) << "JSON output file may not be null";
+  }
+}
+
+void JsonUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
+                                                  int /*iteration*/) {
+  FILE* jsonout = OpenFileForWriting(output_file_);
+  std::stringstream stream;
+  PrintJsonUnitTest(&stream, unit_test);
+  fprintf(jsonout, "%s", StringStreamToString(&stream).c_str());
+  fclose(jsonout);
+}
+
+// Returns an JSON-escaped copy of the input string str.
+std::string JsonUnitTestResultPrinter::EscapeJson(const std::string& str) {
+  Message m;
+
+  for (size_t i = 0; i < str.size(); ++i) {
+    const char ch = str[i];
+    switch (ch) {
+      case '\\':
+      case '"':
+      case '/':
+        m << '\\' << ch;
+        break;
+      case '\b':
+        m << "\\b";
+        break;
+      case '\t':
+        m << "\\t";
+        break;
+      case '\n':
+        m << "\\n";
+        break;
+      case '\f':
+        m << "\\f";
+        break;
+      case '\r':
+        m << "\\r";
+        break;
+      default:
+        if (ch < ' ') {
+          m << "\\u00" << String::FormatByte(static_cast<unsigned char>(ch));
+        } else {
+          m << ch;
+        }
+        break;
+    }
+  }
+
+  return m.GetString();
+}
+
+// The following routines generate an JSON representation of a UnitTest
+// object.
+
+// Formats the given time in milliseconds as seconds.
+static std::string FormatTimeInMillisAsDuration(TimeInMillis ms) {
+  ::std::stringstream ss;
+  ss << (static_cast<double>(ms) * 1e-3) << "s";
+  return ss.str();
+}
+
+// Converts the given epoch time in milliseconds to a date string in the
+// RFC3339 format, without the timezone information.
+static std::string FormatEpochTimeInMillisAsRFC3339(TimeInMillis ms) {
+  struct tm time_struct;
+  if (!PortableLocaltime(static_cast<time_t>(ms / 1000), &time_struct))
+    return "";
+  // YYYY-MM-DDThh:mm:ss
+  return StreamableToString(time_struct.tm_year + 1900) + "-" +
+      String::FormatIntWidth2(time_struct.tm_mon + 1) + "-" +
+      String::FormatIntWidth2(time_struct.tm_mday) + "T" +
+      String::FormatIntWidth2(time_struct.tm_hour) + ":" +
+      String::FormatIntWidth2(time_struct.tm_min) + ":" +
+      String::FormatIntWidth2(time_struct.tm_sec) + "Z";
+}
+
+static inline std::string Indent(size_t width) {
+  return std::string(width, ' ');
+}
+
+void JsonUnitTestResultPrinter::OutputJsonKey(
+    std::ostream* stream,
+    const std::string& element_name,
+    const std::string& name,
+    const std::string& value,
+    const std::string& indent,
+    bool comma) {
+  const std::vector<std::string>& allowed_names =
+      GetReservedOutputAttributesForElement(element_name);
+
+  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
+                   allowed_names.end())
+      << "Key \"" << name << "\" is not allowed for value \"" << element_name
+      << "\".";
+
+  *stream << indent << "\"" << name << "\": \"" << EscapeJson(value) << "\"";
+  if (comma)
+    *stream << ",\n";
+}
+
+void JsonUnitTestResultPrinter::OutputJsonKey(
+    std::ostream* stream,
+    const std::string& element_name,
+    const std::string& name,
+    int value,
+    const std::string& indent,
+    bool comma) {
+  const std::vector<std::string>& allowed_names =
+      GetReservedOutputAttributesForElement(element_name);
+
+  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
+                   allowed_names.end())
+      << "Key \"" << name << "\" is not allowed for value \"" << element_name
+      << "\".";
+
+  *stream << indent << "\"" << name << "\": " << StreamableToString(value);
+  if (comma)
+    *stream << ",\n";
+}
+
+// Streams a test suite JSON stanza containing the given test result.
+void JsonUnitTestResultPrinter::OutputJsonTestSuiteForTestResult(
+    ::std::ostream* stream, const TestResult& result) {
+  // Output the boilerplate for a new test suite.
+  *stream << Indent(4) << "{\n";
+  OutputJsonKey(stream, "testsuite", "name", "NonTestSuiteFailure", Indent(6));
+  OutputJsonKey(stream, "testsuite", "tests", 1, Indent(6));
+  if (!GTEST_FLAG(list_tests)) {
+    OutputJsonKey(stream, "testsuite", "failures", 1, Indent(6));
+    OutputJsonKey(stream, "testsuite", "disabled", 0, Indent(6));
+    OutputJsonKey(stream, "testsuite", "skipped", 0, Indent(6));
+    OutputJsonKey(stream, "testsuite", "errors", 0, Indent(6));
+    OutputJsonKey(stream, "testsuite", "time",
+                  FormatTimeInMillisAsDuration(result.elapsed_time()),
+                  Indent(6));
+    OutputJsonKey(stream, "testsuite", "timestamp",
+                  FormatEpochTimeInMillisAsRFC3339(result.start_timestamp()),
+                  Indent(6));
+  }
+  *stream << Indent(6) << "\"testsuite\": [\n";
+
+  // Output the boilerplate for a new test case.
+  *stream << Indent(8) << "{\n";
+  OutputJsonKey(stream, "testcase", "name", "", Indent(10));
+  OutputJsonKey(stream, "testcase", "status", "RUN", Indent(10));
+  OutputJsonKey(stream, "testcase", "result", "COMPLETED", Indent(10));
+  OutputJsonKey(stream, "testcase", "timestamp",
+                FormatEpochTimeInMillisAsRFC3339(result.start_timestamp()),
+                Indent(10));
+  OutputJsonKey(stream, "testcase", "time",
+                FormatTimeInMillisAsDuration(result.elapsed_time()),
+                Indent(10));
+  OutputJsonKey(stream, "testcase", "classname", "", Indent(10), false);
+  *stream << TestPropertiesAsJson(result, Indent(10));
+
+  // Output the actual test result.
+  OutputJsonTestResult(stream, result);
+
+  // Finish the test suite.
+  *stream << "\n" << Indent(6) << "]\n" << Indent(4) << "}";
+}
+
+// Prints a JSON representation of a TestInfo object.
+void JsonUnitTestResultPrinter::OutputJsonTestInfo(::std::ostream* stream,
+                                                   const char* test_suite_name,
+                                                   const TestInfo& test_info) {
+  const TestResult& result = *test_info.result();
+  const std::string kTestsuite = "testcase";
+  const std::string kIndent = Indent(10);
+
+  *stream << Indent(8) << "{\n";
+  OutputJsonKey(stream, kTestsuite, "name", test_info.name(), kIndent);
+
+  if (test_info.value_param() != nullptr) {
+    OutputJsonKey(stream, kTestsuite, "value_param", test_info.value_param(),
+                  kIndent);
+  }
+  if (test_info.type_param() != nullptr) {
+    OutputJsonKey(stream, kTestsuite, "type_param", test_info.type_param(),
+                  kIndent);
+  }
+  if (GTEST_FLAG(list_tests)) {
+    OutputJsonKey(stream, kTestsuite, "file", test_info.file(), kIndent);
+    OutputJsonKey(stream, kTestsuite, "line", test_info.line(), kIndent, false);
+    *stream << "\n" << Indent(8) << "}";
+    return;
+  }
+
+  OutputJsonKey(stream, kTestsuite, "status",
+                test_info.should_run() ? "RUN" : "NOTRUN", kIndent);
+  OutputJsonKey(stream, kTestsuite, "result",
+                test_info.should_run()
+                    ? (result.Skipped() ? "SKIPPED" : "COMPLETED")
+                    : "SUPPRESSED",
+                kIndent);
+  OutputJsonKey(stream, kTestsuite, "timestamp",
+                FormatEpochTimeInMillisAsRFC3339(result.start_timestamp()),
+                kIndent);
+  OutputJsonKey(stream, kTestsuite, "time",
+                FormatTimeInMillisAsDuration(result.elapsed_time()), kIndent);
+  OutputJsonKey(stream, kTestsuite, "classname", test_suite_name, kIndent,
+                false);
+  *stream << TestPropertiesAsJson(result, kIndent);
+
+  OutputJsonTestResult(stream, result);
+}
+
+void JsonUnitTestResultPrinter::OutputJsonTestResult(::std::ostream* stream,
+                                                     const TestResult& result) {
+  const std::string kIndent = Indent(10);
+
+  int failures = 0;
+  for (int i = 0; i < result.total_part_count(); ++i) {
+    const TestPartResult& part = result.GetTestPartResult(i);
+    if (part.failed()) {
+      *stream << ",\n";
+      if (++failures == 1) {
+        *stream << kIndent << "\"" << "failures" << "\": [\n";
+      }
+      const std::string location =
+          internal::FormatCompilerIndependentFileLocation(part.file_name(),
+                                                          part.line_number());
+      const std::string message = EscapeJson(location + "\n" + part.message());
+      *stream << kIndent << "  {\n"
+              << kIndent << "    \"failure\": \"" << message << "\",\n"
+              << kIndent << "    \"type\": \"\"\n"
+              << kIndent << "  }";
+    }
+  }
+
+  if (failures > 0)
+    *stream << "\n" << kIndent << "]";
+  *stream << "\n" << Indent(8) << "}";
+}
+
+// Prints an JSON representation of a TestSuite object
+void JsonUnitTestResultPrinter::PrintJsonTestSuite(
+    std::ostream* stream, const TestSuite& test_suite) {
+  const std::string kTestsuite = "testsuite";
+  const std::string kIndent = Indent(6);
+
+  *stream << Indent(4) << "{\n";
+  OutputJsonKey(stream, kTestsuite, "name", test_suite.name(), kIndent);
+  OutputJsonKey(stream, kTestsuite, "tests", test_suite.reportable_test_count(),
+                kIndent);
+  if (!GTEST_FLAG(list_tests)) {
+    OutputJsonKey(stream, kTestsuite, "failures",
+                  test_suite.failed_test_count(), kIndent);
+    OutputJsonKey(stream, kTestsuite, "disabled",
+                  test_suite.reportable_disabled_test_count(), kIndent);
+    OutputJsonKey(stream, kTestsuite, "errors", 0, kIndent);
+    OutputJsonKey(
+        stream, kTestsuite, "timestamp",
+        FormatEpochTimeInMillisAsRFC3339(test_suite.start_timestamp()),
+        kIndent);
+    OutputJsonKey(stream, kTestsuite, "time",
+                  FormatTimeInMillisAsDuration(test_suite.elapsed_time()),
+                  kIndent, false);
+    *stream << TestPropertiesAsJson(test_suite.ad_hoc_test_result(), kIndent)
+            << ",\n";
+  }
+
+  *stream << kIndent << "\"" << kTestsuite << "\": [\n";
+
+  bool comma = false;
+  for (int i = 0; i < test_suite.total_test_count(); ++i) {
+    if (test_suite.GetTestInfo(i)->is_reportable()) {
+      if (comma) {
+        *stream << ",\n";
+      } else {
+        comma = true;
+      }
+      OutputJsonTestInfo(stream, test_suite.name(), *test_suite.GetTestInfo(i));
+    }
+  }
+  *stream << "\n" << kIndent << "]\n" << Indent(4) << "}";
+}
+
+// Prints a JSON summary of unit_test to output stream out.
+void JsonUnitTestResultPrinter::PrintJsonUnitTest(std::ostream* stream,
+                                                  const UnitTest& unit_test) {
+  const std::string kTestsuites = "testsuites";
+  const std::string kIndent = Indent(2);
+  *stream << "{\n";
+
+  OutputJsonKey(stream, kTestsuites, "tests", unit_test.reportable_test_count(),
+                kIndent);
+  OutputJsonKey(stream, kTestsuites, "failures", unit_test.failed_test_count(),
+                kIndent);
+  OutputJsonKey(stream, kTestsuites, "disabled",
+                unit_test.reportable_disabled_test_count(), kIndent);
+  OutputJsonKey(stream, kTestsuites, "errors", 0, kIndent);
+  if (GTEST_FLAG(shuffle)) {
+    OutputJsonKey(stream, kTestsuites, "random_seed", unit_test.random_seed(),
+                  kIndent);
+  }
+  OutputJsonKey(stream, kTestsuites, "timestamp",
+                FormatEpochTimeInMillisAsRFC3339(unit_test.start_timestamp()),
+                kIndent);
+  OutputJsonKey(stream, kTestsuites, "time",
+                FormatTimeInMillisAsDuration(unit_test.elapsed_time()), kIndent,
+                false);
+
+  *stream << TestPropertiesAsJson(unit_test.ad_hoc_test_result(), kIndent)
+          << ",\n";
+
+  OutputJsonKey(stream, kTestsuites, "name", "AllTests", kIndent);
+  *stream << kIndent << "\"" << kTestsuites << "\": [\n";
+
+  bool comma = false;
+  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
+    if (unit_test.GetTestSuite(i)->reportable_test_count() > 0) {
+      if (comma) {
+        *stream << ",\n";
+      } else {
+        comma = true;
+      }
+      PrintJsonTestSuite(stream, *unit_test.GetTestSuite(i));
+    }
+  }
+
+  // If there was a test failure outside of one of the test suites (like in a
+  // test environment) include that in the output.
+  if (unit_test.ad_hoc_test_result().Failed()) {
+    OutputJsonTestSuiteForTestResult(stream, unit_test.ad_hoc_test_result());
+  }
+
+  *stream << "\n" << kIndent << "]\n" << "}\n";
+}
+
+void JsonUnitTestResultPrinter::PrintJsonTestList(
+    std::ostream* stream, const std::vector<TestSuite*>& test_suites) {
+  const std::string kTestsuites = "testsuites";
+  const std::string kIndent = Indent(2);
+  *stream << "{\n";
+  int total_tests = 0;
+  for (auto test_suite : test_suites) {
+    total_tests += test_suite->total_test_count();
+  }
+  OutputJsonKey(stream, kTestsuites, "tests", total_tests, kIndent);
+
+  OutputJsonKey(stream, kTestsuites, "name", "AllTests", kIndent);
+  *stream << kIndent << "\"" << kTestsuites << "\": [\n";
+
+  for (size_t i = 0; i < test_suites.size(); ++i) {
+    if (i != 0) {
+      *stream << ",\n";
+    }
+    PrintJsonTestSuite(stream, *test_suites[i]);
+  }
+
+  *stream << "\n"
+          << kIndent << "]\n"
+          << "}\n";
+}
+// Produces a string representing the test properties in a result as
+// a JSON dictionary.
+std::string JsonUnitTestResultPrinter::TestPropertiesAsJson(
+    const TestResult& result, const std::string& indent) {
+  Message attributes;
+  for (int i = 0; i < result.test_property_count(); ++i) {
+    const TestProperty& property = result.GetTestProperty(i);
+    attributes << ",\n" << indent << "\"" << property.key() << "\": "
+               << "\"" << EscapeJson(property.value()) << "\"";
+  }
+  return attributes.GetString();
+}
+
+// End JsonUnitTestResultPrinter
+
+#if GTEST_CAN_STREAM_RESULTS_
+
+// Checks if str contains '=', '&', '%' or '\n' characters. If yes,
+// replaces them by "%xx" where xx is their hexadecimal value. For
+// example, replaces "=" with "%3D".  This algorithm is O(strlen(str))
+// in both time and space -- important as the input str may contain an
+// arbitrarily long test failure message and stack trace.
+std::string StreamingListener::UrlEncode(const char* str) {
+  std::string result;
+  result.reserve(strlen(str) + 1);
+  for (char ch = *str; ch != '\0'; ch = *++str) {
+    switch (ch) {
+      case '%':
+      case '=':
+      case '&':
+      case '\n':
+        result.append("%" + String::FormatByte(static_cast<unsigned char>(ch)));
+        break;
+      default:
+        result.push_back(ch);
+        break;
+    }
+  }
+  return result;
+}
+
+void StreamingListener::SocketWriter::MakeConnection() {
+  GTEST_CHECK_(sockfd_ == -1)
+      << "MakeConnection() can't be called when there is already a connection.";
+
+  addrinfo hints;
+  memset(&hints, 0, sizeof(hints));
+  hints.ai_family = AF_UNSPEC;    // To allow both IPv4 and IPv6 addresses.
+  hints.ai_socktype = SOCK_STREAM;
+  addrinfo* servinfo = nullptr;
+
+  // Use the getaddrinfo() to get a linked list of IP addresses for
+  // the given host name.
+  const int error_num = getaddrinfo(
+      host_name_.c_str(), port_num_.c_str(), &hints, &servinfo);
+  if (error_num != 0) {
+    GTEST_LOG_(WARNING) << "stream_result_to: getaddrinfo() failed: "
+                        << gai_strerror(error_num);
+  }
+
+  // Loop through all the results and connect to the first we can.
+  for (addrinfo* cur_addr = servinfo; sockfd_ == -1 && cur_addr != nullptr;
+       cur_addr = cur_addr->ai_next) {
+    sockfd_ = socket(
+        cur_addr->ai_family, cur_addr->ai_socktype, cur_addr->ai_protocol);
+    if (sockfd_ != -1) {
+      // Connect the client socket to the server socket.
+      if (connect(sockfd_, cur_addr->ai_addr, cur_addr->ai_addrlen) == -1) {
+        close(sockfd_);
+        sockfd_ = -1;
+      }
+    }
+  }
+
+  freeaddrinfo(servinfo);  // all done with this structure
+
+  if (sockfd_ == -1) {
+    GTEST_LOG_(WARNING) << "stream_result_to: failed to connect to "
+                        << host_name_ << ":" << port_num_;
+  }
+}
+
+// End of class Streaming Listener
+#endif  // GTEST_CAN_STREAM_RESULTS__
+
+// class OsStackTraceGetter
+
+const char* const OsStackTraceGetterInterface::kElidedFramesMarker =
+    "... " GTEST_NAME_ " internal frames ...";
+
+std::string OsStackTraceGetter::CurrentStackTrace(int max_depth, int skip_count)
+    GTEST_LOCK_EXCLUDED_(mutex_) {
+#if GTEST_HAS_ABSL
+  std::string result;
+
+  if (max_depth <= 0) {
+    return result;
+  }
+
+  max_depth = std::min(max_depth, kMaxStackTraceDepth);
+
+  std::vector<void*> raw_stack(max_depth);
+  // Skips the frames requested by the caller, plus this function.
+  const int raw_stack_size =
+      absl::GetStackTrace(&raw_stack[0], max_depth, skip_count + 1);
+
+  void* caller_frame = nullptr;
+  {
+    MutexLock lock(&mutex_);
+    caller_frame = caller_frame_;
+  }
+
+  for (int i = 0; i < raw_stack_size; ++i) {
+    if (raw_stack[i] == caller_frame &&
+        !GTEST_FLAG(show_internal_stack_frames)) {
+      // Add a marker to the trace and stop adding frames.
+      absl::StrAppend(&result, kElidedFramesMarker, "\n");
+      break;
+    }
+
+    char tmp[1024];
+    const char* symbol = "(unknown)";
+    if (absl::Symbolize(raw_stack[i], tmp, sizeof(tmp))) {
+      symbol = tmp;
+    }
+
+    char line[1024];
+    snprintf(line, sizeof(line), "  %p: %s\n", raw_stack[i], symbol);
+    result += line;
+  }
+
+  return result;
+
+#else  // !GTEST_HAS_ABSL
+  static_cast<void>(max_depth);
+  static_cast<void>(skip_count);
+  return "";
+#endif  // GTEST_HAS_ABSL
+}
+
+void OsStackTraceGetter::UponLeavingGTest() GTEST_LOCK_EXCLUDED_(mutex_) {
+#if GTEST_HAS_ABSL
+  void* caller_frame = nullptr;
+  if (absl::GetStackTrace(&caller_frame, 1, 3) <= 0) {
+    caller_frame = nullptr;
+  }
+
+  MutexLock lock(&mutex_);
+  caller_frame_ = caller_frame;
+#endif  // GTEST_HAS_ABSL
+}
+
+// A helper class that creates the premature-exit file in its
+// constructor and deletes the file in its destructor.
+class ScopedPrematureExitFile {
+ public:
+  explicit ScopedPrematureExitFile(const char* premature_exit_filepath)
+      : premature_exit_filepath_(premature_exit_filepath ?
+                                 premature_exit_filepath : "") {
+    // If a path to the premature-exit file is specified...
+    if (!premature_exit_filepath_.empty()) {
+      // create the file with a single "0" character in it.  I/O
+      // errors are ignored as there's nothing better we can do and we
+      // don't want to fail the test because of this.
+      FILE* pfile = posix::FOpen(premature_exit_filepath, "w");
+      fwrite("0", 1, 1, pfile);
+      fclose(pfile);
+    }
+  }
+
+  ~ScopedPrematureExitFile() {
+#if !defined GTEST_OS_ESP8266
+    if (!premature_exit_filepath_.empty()) {
+      int retval = remove(premature_exit_filepath_.c_str());
+      if (retval) {
+        GTEST_LOG_(ERROR) << "Failed to remove premature exit filepath \""
+                          << premature_exit_filepath_ << "\" with error "
+                          << retval;
+      }
+    }
+#endif
+  }
+
+ private:
+  const std::string premature_exit_filepath_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedPrematureExitFile);
+};
+
+}  // namespace internal
+
+// class TestEventListeners
+
+TestEventListeners::TestEventListeners()
+    : repeater_(new internal::TestEventRepeater()),
+      default_result_printer_(nullptr),
+      default_xml_generator_(nullptr) {}
+
+TestEventListeners::~TestEventListeners() { delete repeater_; }
+
+// Returns the standard listener responsible for the default console
+// output.  Can be removed from the listeners list to shut down default
+// console output.  Note that removing this object from the listener list
+// with Release transfers its ownership to the user.
+void TestEventListeners::Append(TestEventListener* listener) {
+  repeater_->Append(listener);
+}
+
+// Removes the given event listener from the list and returns it.  It then
+// becomes the caller's responsibility to delete the listener. Returns
+// NULL if the listener is not found in the list.
+TestEventListener* TestEventListeners::Release(TestEventListener* listener) {
+  if (listener == default_result_printer_)
+    default_result_printer_ = nullptr;
+  else if (listener == default_xml_generator_)
+    default_xml_generator_ = nullptr;
+  return repeater_->Release(listener);
+}
+
+// Returns repeater that broadcasts the TestEventListener events to all
+// subscribers.
+TestEventListener* TestEventListeners::repeater() { return repeater_; }
+
+// Sets the default_result_printer attribute to the provided listener.
+// The listener is also added to the listener list and previous
+// default_result_printer is removed from it and deleted. The listener can
+// also be NULL in which case it will not be added to the list. Does
+// nothing if the previous and the current listener objects are the same.
+void TestEventListeners::SetDefaultResultPrinter(TestEventListener* listener) {
+  if (default_result_printer_ != listener) {
+    // It is an error to pass this method a listener that is already in the
+    // list.
+    delete Release(default_result_printer_);
+    default_result_printer_ = listener;
+    if (listener != nullptr) Append(listener);
+  }
+}
+
+// Sets the default_xml_generator attribute to the provided listener.  The
+// listener is also added to the listener list and previous
+// default_xml_generator is removed from it and deleted. The listener can
+// also be NULL in which case it will not be added to the list. Does
+// nothing if the previous and the current listener objects are the same.
+void TestEventListeners::SetDefaultXmlGenerator(TestEventListener* listener) {
+  if (default_xml_generator_ != listener) {
+    // It is an error to pass this method a listener that is already in the
+    // list.
+    delete Release(default_xml_generator_);
+    default_xml_generator_ = listener;
+    if (listener != nullptr) Append(listener);
+  }
+}
+
+// Controls whether events will be forwarded by the repeater to the
+// listeners in the list.
+bool TestEventListeners::EventForwardingEnabled() const {
+  return repeater_->forwarding_enabled();
+}
+
+void TestEventListeners::SuppressEventForwarding() {
+  repeater_->set_forwarding_enabled(false);
+}
+
+// class UnitTest
+
+// Gets the singleton UnitTest object.  The first time this method is
+// called, a UnitTest object is constructed and returned.  Consecutive
+// calls will return the same object.
+//
+// We don't protect this under mutex_ as a user is not supposed to
+// call this before main() starts, from which point on the return
+// value will never change.
+UnitTest* UnitTest::GetInstance() {
+  // CodeGear C++Builder insists on a public destructor for the
+  // default implementation.  Use this implementation to keep good OO
+  // design with private destructor.
+
+#if defined(__BORLANDC__)
+  static UnitTest* const instance = new UnitTest;
+  return instance;
+#else
+  static UnitTest instance;
+  return &instance;
+#endif  // defined(__BORLANDC__)
+}
+
+// Gets the number of successful test suites.
+int UnitTest::successful_test_suite_count() const {
+  return impl()->successful_test_suite_count();
+}
+
+// Gets the number of failed test suites.
+int UnitTest::failed_test_suite_count() const {
+  return impl()->failed_test_suite_count();
+}
+
+// Gets the number of all test suites.
+int UnitTest::total_test_suite_count() const {
+  return impl()->total_test_suite_count();
+}
+
+// Gets the number of all test suites that contain at least one test
+// that should run.
+int UnitTest::test_suite_to_run_count() const {
+  return impl()->test_suite_to_run_count();
+}
+
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+int UnitTest::successful_test_case_count() const {
+  return impl()->successful_test_suite_count();
+}
+int UnitTest::failed_test_case_count() const {
+  return impl()->failed_test_suite_count();
+}
+int UnitTest::total_test_case_count() const {
+  return impl()->total_test_suite_count();
+}
+int UnitTest::test_case_to_run_count() const {
+  return impl()->test_suite_to_run_count();
+}
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+// Gets the number of successful tests.
+int UnitTest::successful_test_count() const {
+  return impl()->successful_test_count();
+}
+
+// Gets the number of skipped tests.
+int UnitTest::skipped_test_count() const {
+  return impl()->skipped_test_count();
+}
+
+// Gets the number of failed tests.
+int UnitTest::failed_test_count() const { return impl()->failed_test_count(); }
+
+// Gets the number of disabled tests that will be reported in the XML report.
+int UnitTest::reportable_disabled_test_count() const {
+  return impl()->reportable_disabled_test_count();
+}
+
+// Gets the number of disabled tests.
+int UnitTest::disabled_test_count() const {
+  return impl()->disabled_test_count();
+}
+
+// Gets the number of tests to be printed in the XML report.
+int UnitTest::reportable_test_count() const {
+  return impl()->reportable_test_count();
+}
+
+// Gets the number of all tests.
+int UnitTest::total_test_count() const { return impl()->total_test_count(); }
+
+// Gets the number of tests that should run.
+int UnitTest::test_to_run_count() const { return impl()->test_to_run_count(); }
+
+// Gets the time of the test program start, in ms from the start of the
+// UNIX epoch.
+internal::TimeInMillis UnitTest::start_timestamp() const {
+    return impl()->start_timestamp();
+}
+
+// Gets the elapsed time, in milliseconds.
+internal::TimeInMillis UnitTest::elapsed_time() const {
+  return impl()->elapsed_time();
+}
+
+// Returns true if and only if the unit test passed (i.e. all test suites
+// passed).
+bool UnitTest::Passed() const { return impl()->Passed(); }
+
+// Returns true if and only if the unit test failed (i.e. some test suite
+// failed or something outside of all tests failed).
+bool UnitTest::Failed() const { return impl()->Failed(); }
+
+// Gets the i-th test suite among all the test suites. i can range from 0 to
+// total_test_suite_count() - 1. If i is not in that range, returns NULL.
+const TestSuite* UnitTest::GetTestSuite(int i) const {
+  return impl()->GetTestSuite(i);
+}
+
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+const TestCase* UnitTest::GetTestCase(int i) const {
+  return impl()->GetTestCase(i);
+}
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+// Returns the TestResult containing information on test failures and
+// properties logged outside of individual test suites.
+const TestResult& UnitTest::ad_hoc_test_result() const {
+  return *impl()->ad_hoc_test_result();
+}
+
+// Gets the i-th test suite among all the test suites. i can range from 0 to
+// total_test_suite_count() - 1. If i is not in that range, returns NULL.
+TestSuite* UnitTest::GetMutableTestSuite(int i) {
+  return impl()->GetMutableSuiteCase(i);
+}
+
+// Returns the list of event listeners that can be used to track events
+// inside Google Test.
+TestEventListeners& UnitTest::listeners() {
+  return *impl()->listeners();
+}
+
+// Registers and returns a global test environment.  When a test
+// program is run, all global test environments will be set-up in the
+// order they were registered.  After all tests in the program have
+// finished, all global test environments will be torn-down in the
+// *reverse* order they were registered.
+//
+// The UnitTest object takes ownership of the given environment.
+//
+// We don't protect this under mutex_, as we only support calling it
+// from the main thread.
+Environment* UnitTest::AddEnvironment(Environment* env) {
+  if (env == nullptr) {
+    return nullptr;
+  }
+
+  impl_->environments().push_back(env);
+  return env;
+}
+
+// Adds a TestPartResult to the current TestResult object.  All Google Test
+// assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc) eventually call
+// this to report their results.  The user code should use the
+// assertion macros instead of calling this directly.
+void UnitTest::AddTestPartResult(
+    TestPartResult::Type result_type,
+    const char* file_name,
+    int line_number,
+    const std::string& message,
+    const std::string& os_stack_trace) GTEST_LOCK_EXCLUDED_(mutex_) {
+  Message msg;
+  msg << message;
+
+  internal::MutexLock lock(&mutex_);
+  if (impl_->gtest_trace_stack().size() > 0) {
+    msg << "\n" << GTEST_NAME_ << " trace:";
+
+    for (size_t i = impl_->gtest_trace_stack().size(); i > 0; --i) {
+      const internal::TraceInfo& trace = impl_->gtest_trace_stack()[i - 1];
+      msg << "\n" << internal::FormatFileLocation(trace.file, trace.line)
+          << " " << trace.message;
+    }
+  }
+
+  if (os_stack_trace.c_str() != nullptr && !os_stack_trace.empty()) {
+    msg << internal::kStackTraceMarker << os_stack_trace;
+  }
+
+  const TestPartResult result = TestPartResult(
+      result_type, file_name, line_number, msg.GetString().c_str());
+  impl_->GetTestPartResultReporterForCurrentThread()->
+      ReportTestPartResult(result);
+
+  if (result_type != TestPartResult::kSuccess &&
+      result_type != TestPartResult::kSkip) {
+    // gtest_break_on_failure takes precedence over
+    // gtest_throw_on_failure.  This allows a user to set the latter
+    // in the code (perhaps in order to use Google Test assertions
+    // with another testing framework) and specify the former on the
+    // command line for debugging.
+    if (GTEST_FLAG(break_on_failure)) {
+#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
+      // Using DebugBreak on Windows allows gtest to still break into a debugger
+      // when a failure happens and both the --gtest_break_on_failure and
+      // the --gtest_catch_exceptions flags are specified.
+      DebugBreak();
+#elif (!defined(__native_client__)) &&            \
+    ((defined(__clang__) || defined(__GNUC__)) && \
+     (defined(__x86_64__) || defined(__i386__)))
+      // with clang/gcc we can achieve the same effect on x86 by invoking int3
+      asm("int3");
+#else
+      // Dereference nullptr through a volatile pointer to prevent the compiler
+      // from removing. We use this rather than abort() or __builtin_trap() for
+      // portability: some debuggers don't correctly trap abort().
+      *static_cast<volatile int*>(nullptr) = 1;
+#endif  // GTEST_OS_WINDOWS
+    } else if (GTEST_FLAG(throw_on_failure)) {
+#if GTEST_HAS_EXCEPTIONS
+      throw internal::GoogleTestFailureException(result);
+#else
+      // We cannot call abort() as it generates a pop-up in debug mode
+      // that cannot be suppressed in VC 7.1 or below.
+      exit(1);
+#endif
+    }
+  }
+}
+
+// Adds a TestProperty to the current TestResult object when invoked from
+// inside a test, to current TestSuite's ad_hoc_test_result_ when invoked
+// from SetUpTestSuite or TearDownTestSuite, or to the global property set
+// when invoked elsewhere.  If the result already contains a property with
+// the same key, the value will be updated.
+void UnitTest::RecordProperty(const std::string& key,
+                              const std::string& value) {
+  impl_->RecordProperty(TestProperty(key, value));
+}
+
+// Runs all tests in this UnitTest object and prints the result.
+// Returns 0 if successful, or 1 otherwise.
+//
+// We don't protect this under mutex_, as we only support calling it
+// from the main thread.
+int UnitTest::Run() {
+  const bool in_death_test_child_process =
+      internal::GTEST_FLAG(internal_run_death_test).length() > 0;
+
+  // Google Test implements this protocol for catching that a test
+  // program exits before returning control to Google Test:
+  //
+  //   1. Upon start, Google Test creates a file whose absolute path
+  //      is specified by the environment variable
+  //      TEST_PREMATURE_EXIT_FILE.
+  //   2. When Google Test has finished its work, it deletes the file.
+  //
+  // This allows a test runner to set TEST_PREMATURE_EXIT_FILE before
+  // running a Google-Test-based test program and check the existence
+  // of the file at the end of the test execution to see if it has
+  // exited prematurely.
+
+  // If we are in the child process of a death test, don't
+  // create/delete the premature exit file, as doing so is unnecessary
+  // and will confuse the parent process.  Otherwise, create/delete
+  // the file upon entering/leaving this function.  If the program
+  // somehow exits before this function has a chance to return, the
+  // premature-exit file will be left undeleted, causing a test runner
+  // that understands the premature-exit-file protocol to report the
+  // test as having failed.
+  const internal::ScopedPrematureExitFile premature_exit_file(
+      in_death_test_child_process
+          ? nullptr
+          : internal::posix::GetEnv("TEST_PREMATURE_EXIT_FILE"));
+
+  // Captures the value of GTEST_FLAG(catch_exceptions).  This value will be
+  // used for the duration of the program.
+  impl()->set_catch_exceptions(GTEST_FLAG(catch_exceptions));
+
+#if GTEST_OS_WINDOWS
+  // Either the user wants Google Test to catch exceptions thrown by the
+  // tests or this is executing in the context of death test child
+  // process. In either case the user does not want to see pop-up dialogs
+  // about crashes - they are expected.
+  if (impl()->catch_exceptions() || in_death_test_child_process) {
+# if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
+    // SetErrorMode doesn't exist on CE.
+    SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOALIGNMENTFAULTEXCEPT |
+                 SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX);
+# endif  // !GTEST_OS_WINDOWS_MOBILE
+
+# if (defined(_MSC_VER) || GTEST_OS_WINDOWS_MINGW) && !GTEST_OS_WINDOWS_MOBILE
+    // Death test children can be terminated with _abort().  On Windows,
+    // _abort() can show a dialog with a warning message.  This forces the
+    // abort message to go to stderr instead.
+    _set_error_mode(_OUT_TO_STDERR);
+# endif
+
+# if defined(_MSC_VER) && !GTEST_OS_WINDOWS_MOBILE
+    // In the debug version, Visual Studio pops up a separate dialog
+    // offering a choice to debug the aborted program. We need to suppress
+    // this dialog or it will pop up for every EXPECT/ASSERT_DEATH statement
+    // executed. Google Test will notify the user of any unexpected
+    // failure via stderr.
+    if (!GTEST_FLAG(break_on_failure))
+      _set_abort_behavior(
+          0x0,                                    // Clear the following flags:
+          _WRITE_ABORT_MSG | _CALL_REPORTFAULT);  // pop-up window, core dump.
+
+    // In debug mode, the Windows CRT can crash with an assertion over invalid
+    // input (e.g. passing an invalid file descriptor).  The default handling
+    // for these assertions is to pop up a dialog and wait for user input.
+    // Instead ask the CRT to dump such assertions to stderr non-interactively.
+    if (!IsDebuggerPresent()) {
+      (void)_CrtSetReportMode(_CRT_ASSERT,
+                              _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
+      (void)_CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
+    }
+# endif
+  }
+#endif  // GTEST_OS_WINDOWS
+
+  return internal::HandleExceptionsInMethodIfSupported(
+      impl(),
+      &internal::UnitTestImpl::RunAllTests,
+      "auxiliary test code (environments or event listeners)") ? 0 : 1;
+}
+
+// Returns the working directory when the first TEST() or TEST_F() was
+// executed.
+const char* UnitTest::original_working_dir() const {
+  return impl_->original_working_dir_.c_str();
+}
+
+// Returns the TestSuite object for the test that's currently running,
+// or NULL if no test is running.
+const TestSuite* UnitTest::current_test_suite() const
+    GTEST_LOCK_EXCLUDED_(mutex_) {
+  internal::MutexLock lock(&mutex_);
+  return impl_->current_test_suite();
+}
+
+// Legacy API is still available but deprecated
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+const TestCase* UnitTest::current_test_case() const
+    GTEST_LOCK_EXCLUDED_(mutex_) {
+  internal::MutexLock lock(&mutex_);
+  return impl_->current_test_suite();
+}
+#endif
+
+// Returns the TestInfo object for the test that's currently running,
+// or NULL if no test is running.
+const TestInfo* UnitTest::current_test_info() const
+    GTEST_LOCK_EXCLUDED_(mutex_) {
+  internal::MutexLock lock(&mutex_);
+  return impl_->current_test_info();
+}
+
+// Returns the random seed used at the start of the current test run.
+int UnitTest::random_seed() const { return impl_->random_seed(); }
+
+// Returns ParameterizedTestSuiteRegistry object used to keep track of
+// value-parameterized tests and instantiate and register them.
+internal::ParameterizedTestSuiteRegistry&
+UnitTest::parameterized_test_registry() GTEST_LOCK_EXCLUDED_(mutex_) {
+  return impl_->parameterized_test_registry();
+}
+
+// Creates an empty UnitTest.
+UnitTest::UnitTest() {
+  impl_ = new internal::UnitTestImpl(this);
+}
+
+// Destructor of UnitTest.
+UnitTest::~UnitTest() {
+  delete impl_;
+}
+
+// Pushes a trace defined by SCOPED_TRACE() on to the per-thread
+// Google Test trace stack.
+void UnitTest::PushGTestTrace(const internal::TraceInfo& trace)
+    GTEST_LOCK_EXCLUDED_(mutex_) {
+  internal::MutexLock lock(&mutex_);
+  impl_->gtest_trace_stack().push_back(trace);
+}
+
+// Pops a trace from the per-thread Google Test trace stack.
+void UnitTest::PopGTestTrace()
+    GTEST_LOCK_EXCLUDED_(mutex_) {
+  internal::MutexLock lock(&mutex_);
+  impl_->gtest_trace_stack().pop_back();
+}
+
+namespace internal {
+
+UnitTestImpl::UnitTestImpl(UnitTest* parent)
+    : parent_(parent),
+      GTEST_DISABLE_MSC_WARNINGS_PUSH_(4355 /* using this in initializer */)
+          default_global_test_part_result_reporter_(this),
+      default_per_thread_test_part_result_reporter_(this),
+      GTEST_DISABLE_MSC_WARNINGS_POP_() global_test_part_result_repoter_(
+          &default_global_test_part_result_reporter_),
+      per_thread_test_part_result_reporter_(
+          &default_per_thread_test_part_result_reporter_),
+      parameterized_test_registry_(),
+      parameterized_tests_registered_(false),
+      last_death_test_suite_(-1),
+      current_test_suite_(nullptr),
+      current_test_info_(nullptr),
+      ad_hoc_test_result_(),
+      os_stack_trace_getter_(nullptr),
+      post_flag_parse_init_performed_(false),
+      random_seed_(0),  // Will be overridden by the flag before first use.
+      random_(0),       // Will be reseeded before first use.
+      start_timestamp_(0),
+      elapsed_time_(0),
+#if GTEST_HAS_DEATH_TEST
+      death_test_factory_(new DefaultDeathTestFactory),
+#endif
+      // Will be overridden by the flag before first use.
+      catch_exceptions_(false) {
+  listeners()->SetDefaultResultPrinter(new PrettyUnitTestResultPrinter);
+}
+
+UnitTestImpl::~UnitTestImpl() {
+  // Deletes every TestSuite.
+  ForEach(test_suites_, internal::Delete<TestSuite>);
+
+  // Deletes every Environment.
+  ForEach(environments_, internal::Delete<Environment>);
+
+  delete os_stack_trace_getter_;
+}
+
+// Adds a TestProperty to the current TestResult object when invoked in a
+// context of a test, to current test suite's ad_hoc_test_result when invoke
+// from SetUpTestSuite/TearDownTestSuite, or to the global property set
+// otherwise.  If the result already contains a property with the same key,
+// the value will be updated.
+void UnitTestImpl::RecordProperty(const TestProperty& test_property) {
+  std::string xml_element;
+  TestResult* test_result;  // TestResult appropriate for property recording.
+
+  if (current_test_info_ != nullptr) {
+    xml_element = "testcase";
+    test_result = &(current_test_info_->result_);
+  } else if (current_test_suite_ != nullptr) {
+    xml_element = "testsuite";
+    test_result = &(current_test_suite_->ad_hoc_test_result_);
+  } else {
+    xml_element = "testsuites";
+    test_result = &ad_hoc_test_result_;
+  }
+  test_result->RecordProperty(xml_element, test_property);
+}
+
+#if GTEST_HAS_DEATH_TEST
+// Disables event forwarding if the control is currently in a death test
+// subprocess. Must not be called before InitGoogleTest.
+void UnitTestImpl::SuppressTestEventsIfInSubprocess() {
+  if (internal_run_death_test_flag_.get() != nullptr)
+    listeners()->SuppressEventForwarding();
+}
+#endif  // GTEST_HAS_DEATH_TEST
+
+// Initializes event listeners performing XML output as specified by
+// UnitTestOptions. Must not be called before InitGoogleTest.
+void UnitTestImpl::ConfigureXmlOutput() {
+  const std::string& output_format = UnitTestOptions::GetOutputFormat();
+  if (output_format == "xml") {
+    listeners()->SetDefaultXmlGenerator(new XmlUnitTestResultPrinter(
+        UnitTestOptions::GetAbsolutePathToOutputFile().c_str()));
+  } else if (output_format == "json") {
+    listeners()->SetDefaultXmlGenerator(new JsonUnitTestResultPrinter(
+        UnitTestOptions::GetAbsolutePathToOutputFile().c_str()));
+  } else if (output_format != "") {
+    GTEST_LOG_(WARNING) << "WARNING: unrecognized output format \""
+                        << output_format << "\" ignored.";
+  }
+}
+
+#if GTEST_CAN_STREAM_RESULTS_
+// Initializes event listeners for streaming test results in string form.
+// Must not be called before InitGoogleTest.
+void UnitTestImpl::ConfigureStreamingOutput() {
+  const std::string& target = GTEST_FLAG(stream_result_to);
+  if (!target.empty()) {
+    const size_t pos = target.find(':');
+    if (pos != std::string::npos) {
+      listeners()->Append(new StreamingListener(target.substr(0, pos),
+                                                target.substr(pos+1)));
+    } else {
+      GTEST_LOG_(WARNING) << "unrecognized streaming target \"" << target
+                          << "\" ignored.";
+    }
+  }
+}
+#endif  // GTEST_CAN_STREAM_RESULTS_
+
+// Performs initialization dependent upon flag values obtained in
+// ParseGoogleTestFlagsOnly.  Is called from InitGoogleTest after the call to
+// ParseGoogleTestFlagsOnly.  In case a user neglects to call InitGoogleTest
+// this function is also called from RunAllTests.  Since this function can be
+// called more than once, it has to be idempotent.
+void UnitTestImpl::PostFlagParsingInit() {
+  // Ensures that this function does not execute more than once.
+  if (!post_flag_parse_init_performed_) {
+    post_flag_parse_init_performed_ = true;
+
+#if defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)
+    // Register to send notifications about key process state changes.
+    listeners()->Append(new GTEST_CUSTOM_TEST_EVENT_LISTENER_());
+#endif  // defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)
+
+#if GTEST_HAS_DEATH_TEST
+    InitDeathTestSubprocessControlInfo();
+    SuppressTestEventsIfInSubprocess();
+#endif  // GTEST_HAS_DEATH_TEST
+
+    // Registers parameterized tests. This makes parameterized tests
+    // available to the UnitTest reflection API without running
+    // RUN_ALL_TESTS.
+    RegisterParameterizedTests();
+
+    // Configures listeners for XML output. This makes it possible for users
+    // to shut down the default XML output before invoking RUN_ALL_TESTS.
+    ConfigureXmlOutput();
+
+    if (GTEST_FLAG(brief)) {
+      listeners()->SetDefaultResultPrinter(new BriefUnitTestResultPrinter);
+    }
+
+#if GTEST_CAN_STREAM_RESULTS_
+    // Configures listeners for streaming test results to the specified server.
+    ConfigureStreamingOutput();
+#endif  // GTEST_CAN_STREAM_RESULTS_
+
+#if GTEST_HAS_ABSL
+    if (GTEST_FLAG(install_failure_signal_handler)) {
+      absl::FailureSignalHandlerOptions options;
+      absl::InstallFailureSignalHandler(options);
+    }
+#endif  // GTEST_HAS_ABSL
+  }
+}
+
+// A predicate that checks the name of a TestSuite against a known
+// value.
+//
+// This is used for implementation of the UnitTest class only.  We put
+// it in the anonymous namespace to prevent polluting the outer
+// namespace.
+//
+// TestSuiteNameIs is copyable.
+class TestSuiteNameIs {
+ public:
+  // Constructor.
+  explicit TestSuiteNameIs(const std::string& name) : name_(name) {}
+
+  // Returns true if and only if the name of test_suite matches name_.
+  bool operator()(const TestSuite* test_suite) const {
+    return test_suite != nullptr &&
+           strcmp(test_suite->name(), name_.c_str()) == 0;
+  }
+
+ private:
+  std::string name_;
+};
+
+// Finds and returns a TestSuite with the given name.  If one doesn't
+// exist, creates one and returns it.  It's the CALLER'S
+// RESPONSIBILITY to ensure that this function is only called WHEN THE
+// TESTS ARE NOT SHUFFLED.
+//
+// Arguments:
+//
+//   test_suite_name: name of the test suite
+//   type_param:      the name of the test suite's type parameter, or NULL if
+//                    this is not a typed or a type-parameterized test suite.
+//   set_up_tc:       pointer to the function that sets up the test suite
+//   tear_down_tc:    pointer to the function that tears down the test suite
+TestSuite* UnitTestImpl::GetTestSuite(
+    const char* test_suite_name, const char* type_param,
+    internal::SetUpTestSuiteFunc set_up_tc,
+    internal::TearDownTestSuiteFunc tear_down_tc) {
+  // Can we find a TestSuite with the given name?
+  const auto test_suite =
+      std::find_if(test_suites_.rbegin(), test_suites_.rend(),
+                   TestSuiteNameIs(test_suite_name));
+
+  if (test_suite != test_suites_.rend()) return *test_suite;
+
+  // No.  Let's create one.
+  auto* const new_test_suite =
+      new TestSuite(test_suite_name, type_param, set_up_tc, tear_down_tc);
+
+  // Is this a death test suite?
+  if (internal::UnitTestOptions::MatchesFilter(test_suite_name,
+                                               kDeathTestSuiteFilter)) {
+    // Yes.  Inserts the test suite after the last death test suite
+    // defined so far.  This only works when the test suites haven't
+    // been shuffled.  Otherwise we may end up running a death test
+    // after a non-death test.
+    ++last_death_test_suite_;
+    test_suites_.insert(test_suites_.begin() + last_death_test_suite_,
+                        new_test_suite);
+  } else {
+    // No.  Appends to the end of the list.
+    test_suites_.push_back(new_test_suite);
+  }
+
+  test_suite_indices_.push_back(static_cast<int>(test_suite_indices_.size()));
+  return new_test_suite;
+}
+
+// Helpers for setting up / tearing down the given environment.  They
+// are for use in the ForEach() function.
+static void SetUpEnvironment(Environment* env) { env->SetUp(); }
+static void TearDownEnvironment(Environment* env) { env->TearDown(); }
+
+// Runs all tests in this UnitTest object, prints the result, and
+// returns true if all tests are successful.  If any exception is
+// thrown during a test, the test is considered to be failed, but the
+// rest of the tests will still be run.
+//
+// When parameterized tests are enabled, it expands and registers
+// parameterized tests first in RegisterParameterizedTests().
+// All other functions called from RunAllTests() may safely assume that
+// parameterized tests are ready to be counted and run.
+bool UnitTestImpl::RunAllTests() {
+  // True if and only if Google Test is initialized before RUN_ALL_TESTS() is
+  // called.
+  const bool gtest_is_initialized_before_run_all_tests = GTestIsInitialized();
+
+  // Do not run any test if the --help flag was specified.
+  if (g_help_flag)
+    return true;
+
+  // Repeats the call to the post-flag parsing initialization in case the
+  // user didn't call InitGoogleTest.
+  PostFlagParsingInit();
+
+  // Even if sharding is not on, test runners may want to use the
+  // GTEST_SHARD_STATUS_FILE to query whether the test supports the sharding
+  // protocol.
+  internal::WriteToShardStatusFileIfNeeded();
+
+  // True if and only if we are in a subprocess for running a thread-safe-style
+  // death test.
+  bool in_subprocess_for_death_test = false;
+
+#if GTEST_HAS_DEATH_TEST
+  in_subprocess_for_death_test =
+      (internal_run_death_test_flag_.get() != nullptr);
+# if defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
+  if (in_subprocess_for_death_test) {
+    GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_();
+  }
+# endif  // defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
+#endif  // GTEST_HAS_DEATH_TEST
+
+  const bool should_shard = ShouldShard(kTestTotalShards, kTestShardIndex,
+                                        in_subprocess_for_death_test);
+
+  // Compares the full test names with the filter to decide which
+  // tests to run.
+  const bool has_tests_to_run = FilterTests(should_shard
+                                              ? HONOR_SHARDING_PROTOCOL
+                                              : IGNORE_SHARDING_PROTOCOL) > 0;
+
+  // Lists the tests and exits if the --gtest_list_tests flag was specified.
+  if (GTEST_FLAG(list_tests)) {
+    // This must be called *after* FilterTests() has been called.
+    ListTestsMatchingFilter();
+    return true;
+  }
+
+  random_seed_ = GTEST_FLAG(shuffle) ?
+      GetRandomSeedFromFlag(GTEST_FLAG(random_seed)) : 0;
+
+  // True if and only if at least one test has failed.
+  bool failed = false;
+
+  TestEventListener* repeater = listeners()->repeater();
+
+  start_timestamp_ = GetTimeInMillis();
+  repeater->OnTestProgramStart(*parent_);
+
+  // How many times to repeat the tests?  We don't want to repeat them
+  // when we are inside the subprocess of a death test.
+  const int repeat = in_subprocess_for_death_test ? 1 : GTEST_FLAG(repeat);
+  // Repeats forever if the repeat count is negative.
+  const bool gtest_repeat_forever = repeat < 0;
+  for (int i = 0; gtest_repeat_forever || i != repeat; i++) {
+    // We want to preserve failures generated by ad-hoc test
+    // assertions executed before RUN_ALL_TESTS().
+    ClearNonAdHocTestResult();
+
+    Timer timer;
+
+    // Shuffles test suites and tests if requested.
+    if (has_tests_to_run && GTEST_FLAG(shuffle)) {
+      random()->Reseed(static_cast<uint32_t>(random_seed_));
+      // This should be done before calling OnTestIterationStart(),
+      // such that a test event listener can see the actual test order
+      // in the event.
+      ShuffleTests();
+    }
+
+    // Tells the unit test event listeners that the tests are about to start.
+    repeater->OnTestIterationStart(*parent_, i);
+
+    // Runs each test suite if there is at least one test to run.
+    if (has_tests_to_run) {
+      // Sets up all environments beforehand.
+      repeater->OnEnvironmentsSetUpStart(*parent_);
+      ForEach(environments_, SetUpEnvironment);
+      repeater->OnEnvironmentsSetUpEnd(*parent_);
+
+      // Runs the tests only if there was no fatal failure or skip triggered
+      // during global set-up.
+      if (Test::IsSkipped()) {
+        // Emit diagnostics when global set-up calls skip, as it will not be
+        // emitted by default.
+        TestResult& test_result =
+            *internal::GetUnitTestImpl()->current_test_result();
+        for (int j = 0; j < test_result.total_part_count(); ++j) {
+          const TestPartResult& test_part_result =
+              test_result.GetTestPartResult(j);
+          if (test_part_result.type() == TestPartResult::kSkip) {
+            const std::string& result = test_part_result.message();
+            printf("%s\n", result.c_str());
+          }
+        }
+        fflush(stdout);
+      } else if (!Test::HasFatalFailure()) {
+        for (int test_index = 0; test_index < total_test_suite_count();
+             test_index++) {
+          GetMutableSuiteCase(test_index)->Run();
+          if (GTEST_FLAG(fail_fast) &&
+              GetMutableSuiteCase(test_index)->Failed()) {
+            for (int j = test_index + 1; j < total_test_suite_count(); j++) {
+              GetMutableSuiteCase(j)->Skip();
+            }
+            break;
+          }
+        }
+      } else if (Test::HasFatalFailure()) {
+        // If there was a fatal failure during the global setup then we know we
+        // aren't going to run any tests. Explicitly mark all of the tests as
+        // skipped to make this obvious in the output.
+        for (int test_index = 0; test_index < total_test_suite_count();
+             test_index++) {
+          GetMutableSuiteCase(test_index)->Skip();
+        }
+      }
+
+      // Tears down all environments in reverse order afterwards.
+      repeater->OnEnvironmentsTearDownStart(*parent_);
+      std::for_each(environments_.rbegin(), environments_.rend(),
+                    TearDownEnvironment);
+      repeater->OnEnvironmentsTearDownEnd(*parent_);
+    }
+
+    elapsed_time_ = timer.Elapsed();
+
+    // Tells the unit test event listener that the tests have just finished.
+    repeater->OnTestIterationEnd(*parent_, i);
+
+    // Gets the result and clears it.
+    if (!Passed()) {
+      failed = true;
+    }
+
+    // Restores the original test order after the iteration.  This
+    // allows the user to quickly repro a failure that happens in the
+    // N-th iteration without repeating the first (N - 1) iterations.
+    // This is not enclosed in "if (GTEST_FLAG(shuffle)) { ... }", in
+    // case the user somehow changes the value of the flag somewhere
+    // (it's always safe to unshuffle the tests).
+    UnshuffleTests();
+
+    if (GTEST_FLAG(shuffle)) {
+      // Picks a new random seed for each iteration.
+      random_seed_ = GetNextRandomSeed(random_seed_);
+    }
+  }
+
+  repeater->OnTestProgramEnd(*parent_);
+
+  if (!gtest_is_initialized_before_run_all_tests) {
+    ColoredPrintf(
+        GTestColor::kRed,
+        "\nIMPORTANT NOTICE - DO NOT IGNORE:\n"
+        "This test program did NOT call " GTEST_INIT_GOOGLE_TEST_NAME_
+        "() before calling RUN_ALL_TESTS(). This is INVALID. Soon " GTEST_NAME_
+        " will start to enforce the valid usage. "
+        "Please fix it ASAP, or IT WILL START TO FAIL.\n");  // NOLINT
+#if GTEST_FOR_GOOGLE_
+    ColoredPrintf(GTestColor::kRed,
+                  "For more details, see http://wiki/Main/ValidGUnitMain.\n");
+#endif  // GTEST_FOR_GOOGLE_
+  }
+
+  return !failed;
+}
+
+// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
+// if the variable is present. If a file already exists at this location, this
+// function will write over it. If the variable is present, but the file cannot
+// be created, prints an error and exits.
+void WriteToShardStatusFileIfNeeded() {
+  const char* const test_shard_file = posix::GetEnv(kTestShardStatusFile);
+  if (test_shard_file != nullptr) {
+    FILE* const file = posix::FOpen(test_shard_file, "w");
+    if (file == nullptr) {
+      ColoredPrintf(GTestColor::kRed,
+                    "Could not write to the test shard status file \"%s\" "
+                    "specified by the %s environment variable.\n",
+                    test_shard_file, kTestShardStatusFile);
+      fflush(stdout);
+      exit(EXIT_FAILURE);
+    }
+    fclose(file);
+  }
+}
+
+// Checks whether sharding is enabled by examining the relevant
+// environment variable values. If the variables are present,
+// but inconsistent (i.e., shard_index >= total_shards), prints
+// an error and exits. If in_subprocess_for_death_test, sharding is
+// disabled because it must only be applied to the original test
+// process. Otherwise, we could filter out death tests we intended to execute.
+bool ShouldShard(const char* total_shards_env,
+                 const char* shard_index_env,
+                 bool in_subprocess_for_death_test) {
+  if (in_subprocess_for_death_test) {
+    return false;
+  }
+
+  const int32_t total_shards = Int32FromEnvOrDie(total_shards_env, -1);
+  const int32_t shard_index = Int32FromEnvOrDie(shard_index_env, -1);
+
+  if (total_shards == -1 && shard_index == -1) {
+    return false;
+  } else if (total_shards == -1 && shard_index != -1) {
+    const Message msg = Message()
+      << "Invalid environment variables: you have "
+      << kTestShardIndex << " = " << shard_index
+      << ", but have left " << kTestTotalShards << " unset.\n";
+    ColoredPrintf(GTestColor::kRed, "%s", msg.GetString().c_str());
+    fflush(stdout);
+    exit(EXIT_FAILURE);
+  } else if (total_shards != -1 && shard_index == -1) {
+    const Message msg = Message()
+      << "Invalid environment variables: you have "
+      << kTestTotalShards << " = " << total_shards
+      << ", but have left " << kTestShardIndex << " unset.\n";
+    ColoredPrintf(GTestColor::kRed, "%s", msg.GetString().c_str());
+    fflush(stdout);
+    exit(EXIT_FAILURE);
+  } else if (shard_index < 0 || shard_index >= total_shards) {
+    const Message msg = Message()
+      << "Invalid environment variables: we require 0 <= "
+      << kTestShardIndex << " < " << kTestTotalShards
+      << ", but you have " << kTestShardIndex << "=" << shard_index
+      << ", " << kTestTotalShards << "=" << total_shards << ".\n";
+    ColoredPrintf(GTestColor::kRed, "%s", msg.GetString().c_str());
+    fflush(stdout);
+    exit(EXIT_FAILURE);
+  }
+
+  return total_shards > 1;
+}
+
+// Parses the environment variable var as an Int32. If it is unset,
+// returns default_val. If it is not an Int32, prints an error
+// and aborts.
+int32_t Int32FromEnvOrDie(const char* var, int32_t default_val) {
+  const char* str_val = posix::GetEnv(var);
+  if (str_val == nullptr) {
+    return default_val;
+  }
+
+  int32_t result;
+  if (!ParseInt32(Message() << "The value of environment variable " << var,
+                  str_val, &result)) {
+    exit(EXIT_FAILURE);
+  }
+  return result;
+}
+
+// Given the total number of shards, the shard index, and the test id,
+// returns true if and only if the test should be run on this shard. The test id
+// is some arbitrary but unique non-negative integer assigned to each test
+// method. Assumes that 0 <= shard_index < total_shards.
+bool ShouldRunTestOnShard(int total_shards, int shard_index, int test_id) {
+  return (test_id % total_shards) == shard_index;
+}
+
+// Compares the name of each test with the user-specified filter to
+// decide whether the test should be run, then records the result in
+// each TestSuite and TestInfo object.
+// If shard_tests == true, further filters tests based on sharding
+// variables in the environment - see
+// https://github.com/google/googletest/blob/master/googletest/docs/advanced.md
+// . Returns the number of tests that should run.
+int UnitTestImpl::FilterTests(ReactionToSharding shard_tests) {
+  const int32_t total_shards = shard_tests == HONOR_SHARDING_PROTOCOL ?
+      Int32FromEnvOrDie(kTestTotalShards, -1) : -1;
+  const int32_t shard_index = shard_tests == HONOR_SHARDING_PROTOCOL ?
+      Int32FromEnvOrDie(kTestShardIndex, -1) : -1;
+
+  // num_runnable_tests are the number of tests that will
+  // run across all shards (i.e., match filter and are not disabled).
+  // num_selected_tests are the number of tests to be run on
+  // this shard.
+  int num_runnable_tests = 0;
+  int num_selected_tests = 0;
+  for (auto* test_suite : test_suites_) {
+    const std::string& test_suite_name = test_suite->name();
+    test_suite->set_should_run(false);
+
+    for (size_t j = 0; j < test_suite->test_info_list().size(); j++) {
+      TestInfo* const test_info = test_suite->test_info_list()[j];
+      const std::string test_name(test_info->name());
+      // A test is disabled if test suite name or test name matches
+      // kDisableTestFilter.
+      const bool is_disabled = internal::UnitTestOptions::MatchesFilter(
+                                   test_suite_name, kDisableTestFilter) ||
+                               internal::UnitTestOptions::MatchesFilter(
+                                   test_name, kDisableTestFilter);
+      test_info->is_disabled_ = is_disabled;
+
+      const bool matches_filter = internal::UnitTestOptions::FilterMatchesTest(
+          test_suite_name, test_name);
+      test_info->matches_filter_ = matches_filter;
+
+      const bool is_runnable =
+          (GTEST_FLAG(also_run_disabled_tests) || !is_disabled) &&
+          matches_filter;
+
+      const bool is_in_another_shard =
+          shard_tests != IGNORE_SHARDING_PROTOCOL &&
+          !ShouldRunTestOnShard(total_shards, shard_index, num_runnable_tests);
+      test_info->is_in_another_shard_ = is_in_another_shard;
+      const bool is_selected = is_runnable && !is_in_another_shard;
+
+      num_runnable_tests += is_runnable;
+      num_selected_tests += is_selected;
+
+      test_info->should_run_ = is_selected;
+      test_suite->set_should_run(test_suite->should_run() || is_selected);
+    }
+  }
+  return num_selected_tests;
+}
+
+// Prints the given C-string on a single line by replacing all '\n'
+// characters with string "\\n".  If the output takes more than
+// max_length characters, only prints the first max_length characters
+// and "...".
+static void PrintOnOneLine(const char* str, int max_length) {
+  if (str != nullptr) {
+    for (int i = 0; *str != '\0'; ++str) {
+      if (i >= max_length) {
+        printf("...");
+        break;
+      }
+      if (*str == '\n') {
+        printf("\\n");
+        i += 2;
+      } else {
+        printf("%c", *str);
+        ++i;
+      }
+    }
+  }
+}
+
+// Prints the names of the tests matching the user-specified filter flag.
+void UnitTestImpl::ListTestsMatchingFilter() {
+  // Print at most this many characters for each type/value parameter.
+  const int kMaxParamLength = 250;
+
+  for (auto* test_suite : test_suites_) {
+    bool printed_test_suite_name = false;
+
+    for (size_t j = 0; j < test_suite->test_info_list().size(); j++) {
+      const TestInfo* const test_info = test_suite->test_info_list()[j];
+      if (test_info->matches_filter_) {
+        if (!printed_test_suite_name) {
+          printed_test_suite_name = true;
+          printf("%s.", test_suite->name());
+          if (test_suite->type_param() != nullptr) {
+            printf("  # %s = ", kTypeParamLabel);
+            // We print the type parameter on a single line to make
+            // the output easy to parse by a program.
+            PrintOnOneLine(test_suite->type_param(), kMaxParamLength);
+          }
+          printf("\n");
+        }
+        printf("  %s", test_info->name());
+        if (test_info->value_param() != nullptr) {
+          printf("  # %s = ", kValueParamLabel);
+          // We print the value parameter on a single line to make the
+          // output easy to parse by a program.
+          PrintOnOneLine(test_info->value_param(), kMaxParamLength);
+        }
+        printf("\n");
+      }
+    }
+  }
+  fflush(stdout);
+  const std::string& output_format = UnitTestOptions::GetOutputFormat();
+  if (output_format == "xml" || output_format == "json") {
+    FILE* fileout = OpenFileForWriting(
+        UnitTestOptions::GetAbsolutePathToOutputFile().c_str());
+    std::stringstream stream;
+    if (output_format == "xml") {
+      XmlUnitTestResultPrinter(
+          UnitTestOptions::GetAbsolutePathToOutputFile().c_str())
+          .PrintXmlTestsList(&stream, test_suites_);
+    } else if (output_format == "json") {
+      JsonUnitTestResultPrinter(
+          UnitTestOptions::GetAbsolutePathToOutputFile().c_str())
+          .PrintJsonTestList(&stream, test_suites_);
+    }
+    fprintf(fileout, "%s", StringStreamToString(&stream).c_str());
+    fclose(fileout);
+  }
+}
+
+// Sets the OS stack trace getter.
+//
+// Does nothing if the input and the current OS stack trace getter are
+// the same; otherwise, deletes the old getter and makes the input the
+// current getter.
+void UnitTestImpl::set_os_stack_trace_getter(
+    OsStackTraceGetterInterface* getter) {
+  if (os_stack_trace_getter_ != getter) {
+    delete os_stack_trace_getter_;
+    os_stack_trace_getter_ = getter;
+  }
+}
+
+// Returns the current OS stack trace getter if it is not NULL;
+// otherwise, creates an OsStackTraceGetter, makes it the current
+// getter, and returns it.
+OsStackTraceGetterInterface* UnitTestImpl::os_stack_trace_getter() {
+  if (os_stack_trace_getter_ == nullptr) {
+#ifdef GTEST_OS_STACK_TRACE_GETTER_
+    os_stack_trace_getter_ = new GTEST_OS_STACK_TRACE_GETTER_;
+#else
+    os_stack_trace_getter_ = new OsStackTraceGetter;
+#endif  // GTEST_OS_STACK_TRACE_GETTER_
+  }
+
+  return os_stack_trace_getter_;
+}
+
+// Returns the most specific TestResult currently running.
+TestResult* UnitTestImpl::current_test_result() {
+  if (current_test_info_ != nullptr) {
+    return &current_test_info_->result_;
+  }
+  if (current_test_suite_ != nullptr) {
+    return &current_test_suite_->ad_hoc_test_result_;
+  }
+  return &ad_hoc_test_result_;
+}
+
+// Shuffles all test suites, and the tests within each test suite,
+// making sure that death tests are still run first.
+void UnitTestImpl::ShuffleTests() {
+  // Shuffles the death test suites.
+  ShuffleRange(random(), 0, last_death_test_suite_ + 1, &test_suite_indices_);
+
+  // Shuffles the non-death test suites.
+  ShuffleRange(random(), last_death_test_suite_ + 1,
+               static_cast<int>(test_suites_.size()), &test_suite_indices_);
+
+  // Shuffles the tests inside each test suite.
+  for (auto& test_suite : test_suites_) {
+    test_suite->ShuffleTests(random());
+  }
+}
+
+// Restores the test suites and tests to their order before the first shuffle.
+void UnitTestImpl::UnshuffleTests() {
+  for (size_t i = 0; i < test_suites_.size(); i++) {
+    // Unshuffles the tests in each test suite.
+    test_suites_[i]->UnshuffleTests();
+    // Resets the index of each test suite.
+    test_suite_indices_[i] = static_cast<int>(i);
+  }
+}
+
+// Returns the current OS stack trace as an std::string.
+//
+// The maximum number of stack frames to be included is specified by
+// the gtest_stack_trace_depth flag.  The skip_count parameter
+// specifies the number of top frames to be skipped, which doesn't
+// count against the number of frames to be included.
+//
+// For example, if Foo() calls Bar(), which in turn calls
+// GetCurrentOsStackTraceExceptTop(..., 1), Foo() will be included in
+// the trace but Bar() and GetCurrentOsStackTraceExceptTop() won't.
+std::string GetCurrentOsStackTraceExceptTop(UnitTest* /*unit_test*/,
+                                            int skip_count) {
+  // We pass skip_count + 1 to skip this wrapper function in addition
+  // to what the user really wants to skip.
+  return GetUnitTestImpl()->CurrentOsStackTraceExceptTop(skip_count + 1);
+}
+
+// Used by the GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_ macro to
+// suppress unreachable code warnings.
+namespace {
+class ClassUniqueToAlwaysTrue {};
+}
+
+bool IsTrue(bool condition) { return condition; }
+
+bool AlwaysTrue() {
+#if GTEST_HAS_EXCEPTIONS
+  // This condition is always false so AlwaysTrue() never actually throws,
+  // but it makes the compiler think that it may throw.
+  if (IsTrue(false))
+    throw ClassUniqueToAlwaysTrue();
+#endif  // GTEST_HAS_EXCEPTIONS
+  return true;
+}
+
+// If *pstr starts with the given prefix, modifies *pstr to be right
+// past the prefix and returns true; otherwise leaves *pstr unchanged
+// and returns false.  None of pstr, *pstr, and prefix can be NULL.
+bool SkipPrefix(const char* prefix, const char** pstr) {
+  const size_t prefix_len = strlen(prefix);
+  if (strncmp(*pstr, prefix, prefix_len) == 0) {
+    *pstr += prefix_len;
+    return true;
+  }
+  return false;
+}
+
+// Parses a string as a command line flag.  The string should have
+// the format "--flag=value".  When def_optional is true, the "=value"
+// part can be omitted.
+//
+// Returns the value of the flag, or NULL if the parsing failed.
+static const char* ParseFlagValue(const char* str, const char* flag,
+                                  bool def_optional) {
+  // str and flag must not be NULL.
+  if (str == nullptr || flag == nullptr) return nullptr;
+
+  // The flag must start with "--" followed by GTEST_FLAG_PREFIX_.
+  const std::string flag_str = std::string("--") + GTEST_FLAG_PREFIX_ + flag;
+  const size_t flag_len = flag_str.length();
+  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
+
+  // Skips the flag name.
+  const char* flag_end = str + flag_len;
+
+  // When def_optional is true, it's OK to not have a "=value" part.
+  if (def_optional && (flag_end[0] == '\0')) {
+    return flag_end;
+  }
+
+  // If def_optional is true and there are more characters after the
+  // flag name, or if def_optional is false, there must be a '=' after
+  // the flag name.
+  if (flag_end[0] != '=') return nullptr;
+
+  // Returns the string after "=".
+  return flag_end + 1;
+}
+
+// Parses a string for a bool flag, in the form of either
+// "--flag=value" or "--flag".
+//
+// In the former case, the value is taken as true as long as it does
+// not start with '0', 'f', or 'F'.
+//
+// In the latter case, the value is taken as true.
+//
+// On success, stores the value of the flag in *value, and returns
+// true.  On failure, returns false without changing *value.
+static bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
+  // Gets the value of the flag as a string.
+  const char* const value_str = ParseFlagValue(str, flag, true);
+
+  // Aborts if the parsing failed.
+  if (value_str == nullptr) return false;
+
+  // Converts the string value to a bool.
+  *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');
+  return true;
+}
+
+// Parses a string for an int32_t flag, in the form of "--flag=value".
+//
+// On success, stores the value of the flag in *value, and returns
+// true.  On failure, returns false without changing *value.
+bool ParseInt32Flag(const char* str, const char* flag, int32_t* value) {
+  // Gets the value of the flag as a string.
+  const char* const value_str = ParseFlagValue(str, flag, false);
+
+  // Aborts if the parsing failed.
+  if (value_str == nullptr) return false;
+
+  // Sets *value to the value of the flag.
+  return ParseInt32(Message() << "The value of flag --" << flag,
+                    value_str, value);
+}
+
+// Parses a string for a string flag, in the form of "--flag=value".
+//
+// On success, stores the value of the flag in *value, and returns
+// true.  On failure, returns false without changing *value.
+template <typename String>
+static bool ParseStringFlag(const char* str, const char* flag, String* value) {
+  // Gets the value of the flag as a string.
+  const char* const value_str = ParseFlagValue(str, flag, false);
+
+  // Aborts if the parsing failed.
+  if (value_str == nullptr) return false;
+
+  // Sets *value to the value of the flag.
+  *value = value_str;
+  return true;
+}
+
+// Determines whether a string has a prefix that Google Test uses for its
+// flags, i.e., starts with GTEST_FLAG_PREFIX_ or GTEST_FLAG_PREFIX_DASH_.
+// If Google Test detects that a command line flag has its prefix but is not
+// recognized, it will print its help message. Flags starting with
+// GTEST_INTERNAL_PREFIX_ followed by "internal_" are considered Google Test
+// internal flags and do not trigger the help message.
+static bool HasGoogleTestFlagPrefix(const char* str) {
+  return (SkipPrefix("--", &str) ||
+          SkipPrefix("-", &str) ||
+          SkipPrefix("/", &str)) &&
+         !SkipPrefix(GTEST_FLAG_PREFIX_ "internal_", &str) &&
+         (SkipPrefix(GTEST_FLAG_PREFIX_, &str) ||
+          SkipPrefix(GTEST_FLAG_PREFIX_DASH_, &str));
+}
+
+// Prints a string containing code-encoded text.  The following escape
+// sequences can be used in the string to control the text color:
+//
+//   @@    prints a single '@' character.
+//   @R    changes the color to red.
+//   @G    changes the color to green.
+//   @Y    changes the color to yellow.
+//   @D    changes to the default terminal text color.
+//
+static void PrintColorEncoded(const char* str) {
+  GTestColor color = GTestColor::kDefault;  // The current color.
+
+  // Conceptually, we split the string into segments divided by escape
+  // sequences.  Then we print one segment at a time.  At the end of
+  // each iteration, the str pointer advances to the beginning of the
+  // next segment.
+  for (;;) {
+    const char* p = strchr(str, '@');
+    if (p == nullptr) {
+      ColoredPrintf(color, "%s", str);
+      return;
+    }
+
+    ColoredPrintf(color, "%s", std::string(str, p).c_str());
+
+    const char ch = p[1];
+    str = p + 2;
+    if (ch == '@') {
+      ColoredPrintf(color, "@");
+    } else if (ch == 'D') {
+      color = GTestColor::kDefault;
+    } else if (ch == 'R') {
+      color = GTestColor::kRed;
+    } else if (ch == 'G') {
+      color = GTestColor::kGreen;
+    } else if (ch == 'Y') {
+      color = GTestColor::kYellow;
+    } else {
+      --str;
+    }
+  }
+}
+
+static const char kColorEncodedHelpMessage[] =
+    "This program contains tests written using " GTEST_NAME_
+    ". You can use the\n"
+    "following command line flags to control its behavior:\n"
+    "\n"
+    "Test Selection:\n"
+    "  @G--" GTEST_FLAG_PREFIX_
+    "list_tests@D\n"
+    "      List the names of all tests instead of running them. The name of\n"
+    "      TEST(Foo, Bar) is \"Foo.Bar\".\n"
+    "  @G--" GTEST_FLAG_PREFIX_
+    "filter=@YPOSITIVE_PATTERNS"
+    "[@G-@YNEGATIVE_PATTERNS]@D\n"
+    "      Run only the tests whose name matches one of the positive patterns "
+    "but\n"
+    "      none of the negative patterns. '?' matches any single character; "
+    "'*'\n"
+    "      matches any substring; ':' separates two patterns.\n"
+    "  @G--" GTEST_FLAG_PREFIX_
+    "also_run_disabled_tests@D\n"
+    "      Run all disabled tests too.\n"
+    "\n"
+    "Test Execution:\n"
+    "  @G--" GTEST_FLAG_PREFIX_
+    "repeat=@Y[COUNT]@D\n"
+    "      Run the tests repeatedly; use a negative count to repeat forever.\n"
+    "  @G--" GTEST_FLAG_PREFIX_
+    "shuffle@D\n"
+    "      Randomize tests' orders on every iteration.\n"
+    "  @G--" GTEST_FLAG_PREFIX_
+    "random_seed=@Y[NUMBER]@D\n"
+    "      Random number seed to use for shuffling test orders (between 1 and\n"
+    "      99999, or 0 to use a seed based on the current time).\n"
+    "\n"
+    "Test Output:\n"
+    "  @G--" GTEST_FLAG_PREFIX_
+    "color=@Y(@Gyes@Y|@Gno@Y|@Gauto@Y)@D\n"
+    "      Enable/disable colored output. The default is @Gauto@D.\n"
+    "  @G--" GTEST_FLAG_PREFIX_
+    "brief=1@D\n"
+    "      Only print test failures.\n"
+    "  @G--" GTEST_FLAG_PREFIX_
+    "print_time=0@D\n"
+    "      Don't print the elapsed time of each test.\n"
+    "  @G--" GTEST_FLAG_PREFIX_
+    "output=@Y(@Gjson@Y|@Gxml@Y)[@G:@YDIRECTORY_PATH@G" GTEST_PATH_SEP_
+    "@Y|@G:@YFILE_PATH]@D\n"
+    "      Generate a JSON or XML report in the given directory or with the "
+    "given\n"
+    "      file name. @YFILE_PATH@D defaults to @Gtest_detail.xml@D.\n"
+# if GTEST_CAN_STREAM_RESULTS_
+    "  @G--" GTEST_FLAG_PREFIX_
+    "stream_result_to=@YHOST@G:@YPORT@D\n"
+    "      Stream test results to the given server.\n"
+# endif  // GTEST_CAN_STREAM_RESULTS_
+    "\n"
+    "Assertion Behavior:\n"
+# if GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
+    "  @G--" GTEST_FLAG_PREFIX_
+    "death_test_style=@Y(@Gfast@Y|@Gthreadsafe@Y)@D\n"
+    "      Set the default death test style.\n"
+# endif  // GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
+    "  @G--" GTEST_FLAG_PREFIX_
+    "break_on_failure@D\n"
+    "      Turn assertion failures into debugger break-points.\n"
+    "  @G--" GTEST_FLAG_PREFIX_
+    "throw_on_failure@D\n"
+    "      Turn assertion failures into C++ exceptions for use by an external\n"
+    "      test framework.\n"
+    "  @G--" GTEST_FLAG_PREFIX_
+    "catch_exceptions=0@D\n"
+    "      Do not report exceptions as test failures. Instead, allow them\n"
+    "      to crash the program or throw a pop-up (on Windows).\n"
+    "\n"
+    "Except for @G--" GTEST_FLAG_PREFIX_
+    "list_tests@D, you can alternatively set "
+    "the corresponding\n"
+    "environment variable of a flag (all letters in upper-case). For example, "
+    "to\n"
+    "disable colored text output, you can either specify "
+    "@G--" GTEST_FLAG_PREFIX_
+    "color=no@D or set\n"
+    "the @G" GTEST_FLAG_PREFIX_UPPER_
+    "COLOR@D environment variable to @Gno@D.\n"
+    "\n"
+    "For more information, please read the " GTEST_NAME_
+    " documentation at\n"
+    "@G" GTEST_PROJECT_URL_ "@D. If you find a bug in " GTEST_NAME_
+    "\n"
+    "(not one in your own code or tests), please report it to\n"
+    "@G<" GTEST_DEV_EMAIL_ ">@D.\n";
+
+static bool ParseGoogleTestFlag(const char* const arg) {
+  return ParseBoolFlag(arg, kAlsoRunDisabledTestsFlag,
+                       &GTEST_FLAG(also_run_disabled_tests)) ||
+         ParseBoolFlag(arg, kBreakOnFailureFlag,
+                       &GTEST_FLAG(break_on_failure)) ||
+         ParseBoolFlag(arg, kCatchExceptionsFlag,
+                       &GTEST_FLAG(catch_exceptions)) ||
+         ParseStringFlag(arg, kColorFlag, &GTEST_FLAG(color)) ||
+         ParseStringFlag(arg, kDeathTestStyleFlag,
+                         &GTEST_FLAG(death_test_style)) ||
+         ParseBoolFlag(arg, kDeathTestUseFork,
+                       &GTEST_FLAG(death_test_use_fork)) ||
+         ParseBoolFlag(arg, kFailFast, &GTEST_FLAG(fail_fast)) ||
+         ParseStringFlag(arg, kFilterFlag, &GTEST_FLAG(filter)) ||
+         ParseStringFlag(arg, kInternalRunDeathTestFlag,
+                         &GTEST_FLAG(internal_run_death_test)) ||
+         ParseBoolFlag(arg, kListTestsFlag, &GTEST_FLAG(list_tests)) ||
+         ParseStringFlag(arg, kOutputFlag, &GTEST_FLAG(output)) ||
+         ParseBoolFlag(arg, kBriefFlag, &GTEST_FLAG(brief)) ||
+         ParseBoolFlag(arg, kPrintTimeFlag, &GTEST_FLAG(print_time)) ||
+         ParseBoolFlag(arg, kPrintUTF8Flag, &GTEST_FLAG(print_utf8)) ||
+         ParseInt32Flag(arg, kRandomSeedFlag, &GTEST_FLAG(random_seed)) ||
+         ParseInt32Flag(arg, kRepeatFlag, &GTEST_FLAG(repeat)) ||
+         ParseBoolFlag(arg, kShuffleFlag, &GTEST_FLAG(shuffle)) ||
+         ParseInt32Flag(arg, kStackTraceDepthFlag,
+                        &GTEST_FLAG(stack_trace_depth)) ||
+         ParseStringFlag(arg, kStreamResultToFlag,
+                         &GTEST_FLAG(stream_result_to)) ||
+         ParseBoolFlag(arg, kThrowOnFailureFlag, &GTEST_FLAG(throw_on_failure));
+}
+
+#if GTEST_USE_OWN_FLAGFILE_FLAG_
+static void LoadFlagsFromFile(const std::string& path) {
+  FILE* flagfile = posix::FOpen(path.c_str(), "r");
+  if (!flagfile) {
+    GTEST_LOG_(FATAL) << "Unable to open file \"" << GTEST_FLAG(flagfile)
+                      << "\"";
+  }
+  std::string contents(ReadEntireFile(flagfile));
+  posix::FClose(flagfile);
+  std::vector<std::string> lines;
+  SplitString(contents, '\n', &lines);
+  for (size_t i = 0; i < lines.size(); ++i) {
+    if (lines[i].empty())
+      continue;
+    if (!ParseGoogleTestFlag(lines[i].c_str()))
+      g_help_flag = true;
+  }
+}
+#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
+
+// Parses the command line for Google Test flags, without initializing
+// other parts of Google Test.  The type parameter CharType can be
+// instantiated to either char or wchar_t.
+template <typename CharType>
+void ParseGoogleTestFlagsOnlyImpl(int* argc, CharType** argv) {
+  for (int i = 1; i < *argc; i++) {
+    const std::string arg_string = StreamableToString(argv[i]);
+    const char* const arg = arg_string.c_str();
+
+    using internal::ParseBoolFlag;
+    using internal::ParseInt32Flag;
+    using internal::ParseStringFlag;
+
+    bool remove_flag = false;
+    if (ParseGoogleTestFlag(arg)) {
+      remove_flag = true;
+#if GTEST_USE_OWN_FLAGFILE_FLAG_
+    } else if (ParseStringFlag(arg, kFlagfileFlag, &GTEST_FLAG(flagfile))) {
+      LoadFlagsFromFile(GTEST_FLAG(flagfile));
+      remove_flag = true;
+#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
+    } else if (arg_string == "--help" || arg_string == "-h" ||
+               arg_string == "-?" || arg_string == "/?" ||
+               HasGoogleTestFlagPrefix(arg)) {
+      // Both help flag and unrecognized Google Test flags (excluding
+      // internal ones) trigger help display.
+      g_help_flag = true;
+    }
+
+    if (remove_flag) {
+      // Shift the remainder of the argv list left by one.  Note
+      // that argv has (*argc + 1) elements, the last one always being
+      // NULL.  The following loop moves the trailing NULL element as
+      // well.
+      for (int j = i; j != *argc; j++) {
+        argv[j] = argv[j + 1];
+      }
+
+      // Decrements the argument count.
+      (*argc)--;
+
+      // We also need to decrement the iterator as we just removed
+      // an element.
+      i--;
+    }
+  }
+
+  if (g_help_flag) {
+    // We print the help here instead of in RUN_ALL_TESTS(), as the
+    // latter may not be called at all if the user is using Google
+    // Test with another testing framework.
+    PrintColorEncoded(kColorEncodedHelpMessage);
+  }
+}
+
+// Parses the command line for Google Test flags, without initializing
+// other parts of Google Test.
+void ParseGoogleTestFlagsOnly(int* argc, char** argv) {
+  ParseGoogleTestFlagsOnlyImpl(argc, argv);
+
+  // Fix the value of *_NSGetArgc() on macOS, but if and only if
+  // *_NSGetArgv() == argv
+  // Only applicable to char** version of argv
+#if GTEST_OS_MAC
+#ifndef GTEST_OS_IOS
+  if (*_NSGetArgv() == argv) {
+    *_NSGetArgc() = *argc;
+  }
+#endif
+#endif
+}
+void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv) {
+  ParseGoogleTestFlagsOnlyImpl(argc, argv);
+}
+
+// The internal implementation of InitGoogleTest().
+//
+// The type parameter CharType can be instantiated to either char or
+// wchar_t.
+template <typename CharType>
+void InitGoogleTestImpl(int* argc, CharType** argv) {
+  // We don't want to run the initialization code twice.
+  if (GTestIsInitialized()) return;
+
+  if (*argc <= 0) return;
+
+  g_argvs.clear();
+  for (int i = 0; i != *argc; i++) {
+    g_argvs.push_back(StreamableToString(argv[i]));
+  }
+
+#if GTEST_HAS_ABSL
+  absl::InitializeSymbolizer(g_argvs[0].c_str());
+#endif  // GTEST_HAS_ABSL
+
+  ParseGoogleTestFlagsOnly(argc, argv);
+  GetUnitTestImpl()->PostFlagParsingInit();
+}
+
+}  // namespace internal
+
+// Initializes Google Test.  This must be called before calling
+// RUN_ALL_TESTS().  In particular, it parses a command line for the
+// flags that Google Test recognizes.  Whenever a Google Test flag is
+// seen, it is removed from argv, and *argc is decremented.
+//
+// No value is returned.  Instead, the Google Test flag variables are
+// updated.
+//
+// Calling the function for the second time has no user-visible effect.
+void InitGoogleTest(int* argc, char** argv) {
+#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
+  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
+#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
+  internal::InitGoogleTestImpl(argc, argv);
+#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
+}
+
+// This overloaded version can be used in Windows programs compiled in
+// UNICODE mode.
+void InitGoogleTest(int* argc, wchar_t** argv) {
+#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
+  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
+#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
+  internal::InitGoogleTestImpl(argc, argv);
+#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
+}
+
+// This overloaded version can be used on Arduino/embedded platforms where
+// there is no argc/argv.
+void InitGoogleTest() {
+  // Since Arduino doesn't have a command line, fake out the argc/argv arguments
+  int argc = 1;
+  const auto arg0 = "dummy";
+  char* argv0 = const_cast<char*>(arg0);
+  char** argv = &argv0;
+
+#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
+  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(&argc, argv);
+#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
+  internal::InitGoogleTestImpl(&argc, argv);
+#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
+}
+
+std::string TempDir() {
+#if defined(GTEST_CUSTOM_TEMPDIR_FUNCTION_)
+  return GTEST_CUSTOM_TEMPDIR_FUNCTION_();
+#elif GTEST_OS_WINDOWS_MOBILE
+  return "\\temp\\";
+#elif GTEST_OS_WINDOWS
+  const char* temp_dir = internal::posix::GetEnv("TEMP");
+  if (temp_dir == nullptr || temp_dir[0] == '\0') {
+    return "\\temp\\";
+  } else if (temp_dir[strlen(temp_dir) - 1] == '\\') {
+    return temp_dir;
+  } else {
+    return std::string(temp_dir) + "\\";
+  }
+#elif GTEST_OS_LINUX_ANDROID
+  const char* temp_dir = internal::posix::GetEnv("TEST_TMPDIR");
+  if (temp_dir == nullptr || temp_dir[0] == '\0') {
+    return "/data/local/tmp/";
+  } else {
+    return temp_dir;
+  }
+#elif GTEST_OS_LINUX
+  const char* temp_dir = internal::posix::GetEnv("TEST_TMPDIR");
+  if (temp_dir == nullptr || temp_dir[0] == '\0') {
+    return "/tmp/";
+  } else {
+    return temp_dir;
+  }
+#else
+  return "/tmp/";
+#endif  // GTEST_OS_WINDOWS_MOBILE
+}
+
+// Class ScopedTrace
+
+// Pushes the given source file location and message onto a per-thread
+// trace stack maintained by Google Test.
+void ScopedTrace::PushTrace(const char* file, int line, std::string message) {
+  internal::TraceInfo trace;
+  trace.file = file;
+  trace.line = line;
+  trace.message.swap(message);
+
+  UnitTest::GetInstance()->PushGTestTrace(trace);
+}
+
+// Pops the info pushed by the c'tor.
+ScopedTrace::~ScopedTrace()
+    GTEST_LOCK_EXCLUDED_(&UnitTest::mutex_) {
+  UnitTest::GetInstance()->PopGTestTrace();
+}
+
+}  // namespace testing
+// Copyright 2005, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//
+// This file implements death tests.
+
+
+#include <functional>
+#include <utility>
+
+
+#if GTEST_HAS_DEATH_TEST
+
+# if GTEST_OS_MAC
+#  include <crt_externs.h>
+# endif  // GTEST_OS_MAC
+
+# include <errno.h>
+# include <fcntl.h>
+# include <limits.h>
+
+# if GTEST_OS_LINUX
+#  include <signal.h>
+# endif  // GTEST_OS_LINUX
+
+# include <stdarg.h>
+
+# if GTEST_OS_WINDOWS
+#  include <windows.h>
+# else
+#  include <sys/mman.h>
+#  include <sys/wait.h>
+# endif  // GTEST_OS_WINDOWS
+
+# if GTEST_OS_QNX
+#  include <spawn.h>
+# endif  // GTEST_OS_QNX
+
+# if GTEST_OS_FUCHSIA
+#  include <lib/fdio/fd.h>
+#  include <lib/fdio/io.h>
+#  include <lib/fdio/spawn.h>
+#  include <lib/zx/channel.h>
+#  include <lib/zx/port.h>
+#  include <lib/zx/process.h>
+#  include <lib/zx/socket.h>
+#  include <zircon/processargs.h>
+#  include <zircon/syscalls.h>
+#  include <zircon/syscalls/policy.h>
+#  include <zircon/syscalls/port.h>
+# endif  // GTEST_OS_FUCHSIA
+
+#endif  // GTEST_HAS_DEATH_TEST
+
+
+namespace testing {
+
+// Constants.
+
+// The default death test style.
+//
+// This is defined in internal/gtest-port.h as "fast", but can be overridden by
+// a definition in internal/custom/gtest-port.h. The recommended value, which is
+// used internally at Google, is "threadsafe".
+static const char kDefaultDeathTestStyle[] = GTEST_DEFAULT_DEATH_TEST_STYLE;
+
+GTEST_DEFINE_string_(
+    death_test_style,
+    internal::StringFromGTestEnv("death_test_style", kDefaultDeathTestStyle),
+    "Indicates how to run a death test in a forked child process: "
+    "\"threadsafe\" (child process re-executes the test binary "
+    "from the beginning, running only the specific death test) or "
+    "\"fast\" (child process runs the death test immediately "
+    "after forking).");
+
+GTEST_DEFINE_bool_(
+    death_test_use_fork,
+    internal::BoolFromGTestEnv("death_test_use_fork", false),
+    "Instructs to use fork()/_exit() instead of clone() in death tests. "
+    "Ignored and always uses fork() on POSIX systems where clone() is not "
+    "implemented. Useful when running under valgrind or similar tools if "
+    "those do not support clone(). Valgrind 3.3.1 will just fail if "
+    "it sees an unsupported combination of clone() flags. "
+    "It is not recommended to use this flag w/o valgrind though it will "
+    "work in 99% of the cases. Once valgrind is fixed, this flag will "
+    "most likely be removed.");
+
+namespace internal {
+GTEST_DEFINE_string_(
+    internal_run_death_test, "",
+    "Indicates the file, line number, temporal index of "
+    "the single death test to run, and a file descriptor to "
+    "which a success code may be sent, all separated by "
+    "the '|' characters.  This flag is specified if and only if the "
+    "current process is a sub-process launched for running a thread-safe "
+    "death test.  FOR INTERNAL USE ONLY.");
+}  // namespace internal
+
+#if GTEST_HAS_DEATH_TEST
+
+namespace internal {
+
+// Valid only for fast death tests. Indicates the code is running in the
+// child process of a fast style death test.
+# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
+static bool g_in_fast_death_test_child = false;
+# endif
+
+// Returns a Boolean value indicating whether the caller is currently
+// executing in the context of the death test child process.  Tools such as
+// Valgrind heap checkers may need this to modify their behavior in death
+// tests.  IMPORTANT: This is an internal utility.  Using it may break the
+// implementation of death tests.  User code MUST NOT use it.
+bool InDeathTestChild() {
+# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
+
+  // On Windows and Fuchsia, death tests are thread-safe regardless of the value
+  // of the death_test_style flag.
+  return !GTEST_FLAG(internal_run_death_test).empty();
+
+# else
+
+  if (GTEST_FLAG(death_test_style) == "threadsafe")
+    return !GTEST_FLAG(internal_run_death_test).empty();
+  else
+    return g_in_fast_death_test_child;
+#endif
+}
+
+}  // namespace internal
+
+// ExitedWithCode constructor.
+ExitedWithCode::ExitedWithCode(int exit_code) : exit_code_(exit_code) {
+}
+
+// ExitedWithCode function-call operator.
+bool ExitedWithCode::operator()(int exit_status) const {
+# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
+
+  return exit_status == exit_code_;
+
+# else
+
+  return WIFEXITED(exit_status) && WEXITSTATUS(exit_status) == exit_code_;
+
+# endif  // GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
+}
+
+# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
+// KilledBySignal constructor.
+KilledBySignal::KilledBySignal(int signum) : signum_(signum) {
+}
+
+// KilledBySignal function-call operator.
+bool KilledBySignal::operator()(int exit_status) const {
+#  if defined(GTEST_KILLED_BY_SIGNAL_OVERRIDE_)
+  {
+    bool result;
+    if (GTEST_KILLED_BY_SIGNAL_OVERRIDE_(signum_, exit_status, &result)) {
+      return result;
+    }
+  }
+#  endif  // defined(GTEST_KILLED_BY_SIGNAL_OVERRIDE_)
+  return WIFSIGNALED(exit_status) && WTERMSIG(exit_status) == signum_;
+}
+# endif  // !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
+
+namespace internal {
+
+// Utilities needed for death tests.
+
+// Generates a textual description of a given exit code, in the format
+// specified by wait(2).
+static std::string ExitSummary(int exit_code) {
+  Message m;
+
+# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
+
+  m << "Exited with exit status " << exit_code;
+
+# else
+
+  if (WIFEXITED(exit_code)) {
+    m << "Exited with exit status " << WEXITSTATUS(exit_code);
+  } else if (WIFSIGNALED(exit_code)) {
+    m << "Terminated by signal " << WTERMSIG(exit_code);
+  }
+#  ifdef WCOREDUMP
+  if (WCOREDUMP(exit_code)) {
+    m << " (core dumped)";
+  }
+#  endif
+# endif  // GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
+
+  return m.GetString();
+}
+
+// Returns true if exit_status describes a process that was terminated
+// by a signal, or exited normally with a nonzero exit code.
+bool ExitedUnsuccessfully(int exit_status) {
+  return !ExitedWithCode(0)(exit_status);
+}
+
+# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
+// Generates a textual failure message when a death test finds more than
+// one thread running, or cannot determine the number of threads, prior
+// to executing the given statement.  It is the responsibility of the
+// caller not to pass a thread_count of 1.
+static std::string DeathTestThreadWarning(size_t thread_count) {
+  Message msg;
+  msg << "Death tests use fork(), which is unsafe particularly"
+      << " in a threaded context. For this test, " << GTEST_NAME_ << " ";
+  if (thread_count == 0) {
+    msg << "couldn't detect the number of threads.";
+  } else {
+    msg << "detected " << thread_count << " threads.";
+  }
+  msg << " See "
+         "https://github.com/google/googletest/blob/master/docs/"
+         "advanced.md#death-tests-and-threads"
+      << " for more explanation and suggested solutions, especially if"
+      << " this is the last message you see before your test times out.";
+  return msg.GetString();
+}
+# endif  // !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
+
+// Flag characters for reporting a death test that did not die.
+static const char kDeathTestLived = 'L';
+static const char kDeathTestReturned = 'R';
+static const char kDeathTestThrew = 'T';
+static const char kDeathTestInternalError = 'I';
+
+#if GTEST_OS_FUCHSIA
+
+// File descriptor used for the pipe in the child process.
+static const int kFuchsiaReadPipeFd = 3;
+
+#endif
+
+// An enumeration describing all of the possible ways that a death test can
+// conclude.  DIED means that the process died while executing the test
+// code; LIVED means that process lived beyond the end of the test code;
+// RETURNED means that the test statement attempted to execute a return
+// statement, which is not allowed; THREW means that the test statement
+// returned control by throwing an exception.  IN_PROGRESS means the test
+// has not yet concluded.
+enum DeathTestOutcome { IN_PROGRESS, DIED, LIVED, RETURNED, THREW };
+
+// Routine for aborting the program which is safe to call from an
+// exec-style death test child process, in which case the error
+// message is propagated back to the parent process.  Otherwise, the
+// message is simply printed to stderr.  In either case, the program
+// then exits with status 1.
+static void DeathTestAbort(const std::string& message) {
+  // On a POSIX system, this function may be called from a threadsafe-style
+  // death test child process, which operates on a very small stack.  Use
+  // the heap for any additional non-minuscule memory requirements.
+  const InternalRunDeathTestFlag* const flag =
+      GetUnitTestImpl()->internal_run_death_test_flag();
+  if (flag != nullptr) {
+    FILE* parent = posix::FDOpen(flag->write_fd(), "w");
+    fputc(kDeathTestInternalError, parent);
+    fprintf(parent, "%s", message.c_str());
+    fflush(parent);
+    _exit(1);
+  } else {
+    fprintf(stderr, "%s", message.c_str());
+    fflush(stderr);
+    posix::Abort();
+  }
+}
+
+// A replacement for CHECK that calls DeathTestAbort if the assertion
+// fails.
+# define GTEST_DEATH_TEST_CHECK_(expression) \
+  do { \
+    if (!::testing::internal::IsTrue(expression)) { \
+      DeathTestAbort( \
+          ::std::string("CHECK failed: File ") + __FILE__ +  ", line " \
+          + ::testing::internal::StreamableToString(__LINE__) + ": " \
+          + #expression); \
+    } \
+  } while (::testing::internal::AlwaysFalse())
+
+// This macro is similar to GTEST_DEATH_TEST_CHECK_, but it is meant for
+// evaluating any system call that fulfills two conditions: it must return
+// -1 on failure, and set errno to EINTR when it is interrupted and
+// should be tried again.  The macro expands to a loop that repeatedly
+// evaluates the expression as long as it evaluates to -1 and sets
+// errno to EINTR.  If the expression evaluates to -1 but errno is
+// something other than EINTR, DeathTestAbort is called.
+# define GTEST_DEATH_TEST_CHECK_SYSCALL_(expression) \
+  do { \
+    int gtest_retval; \
+    do { \
+      gtest_retval = (expression); \
+    } while (gtest_retval == -1 && errno == EINTR); \
+    if (gtest_retval == -1) { \
+      DeathTestAbort( \
+          ::std::string("CHECK failed: File ") + __FILE__ + ", line " \
+          + ::testing::internal::StreamableToString(__LINE__) + ": " \
+          + #expression + " != -1"); \
+    } \
+  } while (::testing::internal::AlwaysFalse())
+
+// Returns the message describing the last system error in errno.
+std::string GetLastErrnoDescription() {
+    return errno == 0 ? "" : posix::StrError(errno);
+}
+
+// This is called from a death test parent process to read a failure
+// message from the death test child process and log it with the FATAL
+// severity. On Windows, the message is read from a pipe handle. On other
+// platforms, it is read from a file descriptor.
+static void FailFromInternalError(int fd) {
+  Message error;
+  char buffer[256];
+  int num_read;
+
+  do {
+    while ((num_read = posix::Read(fd, buffer, 255)) > 0) {
+      buffer[num_read] = '\0';
+      error << buffer;
+    }
+  } while (num_read == -1 && errno == EINTR);
+
+  if (num_read == 0) {
+    GTEST_LOG_(FATAL) << error.GetString();
+  } else {
+    const int last_error = errno;
+    GTEST_LOG_(FATAL) << "Error while reading death test internal: "
+                      << GetLastErrnoDescription() << " [" << last_error << "]";
+  }
+}
+
+// Death test constructor.  Increments the running death test count
+// for the current test.
+DeathTest::DeathTest() {
+  TestInfo* const info = GetUnitTestImpl()->current_test_info();
+  if (info == nullptr) {
+    DeathTestAbort("Cannot run a death test outside of a TEST or "
+                   "TEST_F construct");
+  }
+}
+
+// Creates and returns a death test by dispatching to the current
+// death test factory.
+bool DeathTest::Create(const char* statement,
+                       Matcher<const std::string&> matcher, const char* file,
+                       int line, DeathTest** test) {
+  return GetUnitTestImpl()->death_test_factory()->Create(
+      statement, std::move(matcher), file, line, test);
+}
+
+const char* DeathTest::LastMessage() {
+  return last_death_test_message_.c_str();
+}
+
+void DeathTest::set_last_death_test_message(const std::string& message) {
+  last_death_test_message_ = message;
+}
+
+std::string DeathTest::last_death_test_message_;
+
+// Provides cross platform implementation for some death functionality.
+class DeathTestImpl : public DeathTest {
+ protected:
+  DeathTestImpl(const char* a_statement, Matcher<const std::string&> matcher)
+      : statement_(a_statement),
+        matcher_(std::move(matcher)),
+        spawned_(false),
+        status_(-1),
+        outcome_(IN_PROGRESS),
+        read_fd_(-1),
+        write_fd_(-1) {}
+
+  // read_fd_ is expected to be closed and cleared by a derived class.
+  ~DeathTestImpl() override { GTEST_DEATH_TEST_CHECK_(read_fd_ == -1); }
+
+  void Abort(AbortReason reason) override;
+  bool Passed(bool status_ok) override;
+
+  const char* statement() const { return statement_; }
+  bool spawned() const { return spawned_; }
+  void set_spawned(bool is_spawned) { spawned_ = is_spawned; }
+  int status() const { return status_; }
+  void set_status(int a_status) { status_ = a_status; }
+  DeathTestOutcome outcome() const { return outcome_; }
+  void set_outcome(DeathTestOutcome an_outcome) { outcome_ = an_outcome; }
+  int read_fd() const { return read_fd_; }
+  void set_read_fd(int fd) { read_fd_ = fd; }
+  int write_fd() const { return write_fd_; }
+  void set_write_fd(int fd) { write_fd_ = fd; }
+
+  // Called in the parent process only. Reads the result code of the death
+  // test child process via a pipe, interprets it to set the outcome_
+  // member, and closes read_fd_.  Outputs diagnostics and terminates in
+  // case of unexpected codes.
+  void ReadAndInterpretStatusByte();
+
+  // Returns stderr output from the child process.
+  virtual std::string GetErrorLogs();
+
+ private:
+  // The textual content of the code this object is testing.  This class
+  // doesn't own this string and should not attempt to delete it.
+  const char* const statement_;
+  // A matcher that's expected to match the stderr output by the child process.
+  Matcher<const std::string&> matcher_;
+  // True if the death test child process has been successfully spawned.
+  bool spawned_;
+  // The exit status of the child process.
+  int status_;
+  // How the death test concluded.
+  DeathTestOutcome outcome_;
+  // Descriptor to the read end of the pipe to the child process.  It is
+  // always -1 in the child process.  The child keeps its write end of the
+  // pipe in write_fd_.
+  int read_fd_;
+  // Descriptor to the child's write end of the pipe to the parent process.
+  // It is always -1 in the parent process.  The parent keeps its end of the
+  // pipe in read_fd_.
+  int write_fd_;
+};
+
+// Called in the parent process only. Reads the result code of the death
+// test child process via a pipe, interprets it to set the outcome_
+// member, and closes read_fd_.  Outputs diagnostics and terminates in
+// case of unexpected codes.
+void DeathTestImpl::ReadAndInterpretStatusByte() {
+  char flag;
+  int bytes_read;
+
+  // The read() here blocks until data is available (signifying the
+  // failure of the death test) or until the pipe is closed (signifying
+  // its success), so it's okay to call this in the parent before
+  // the child process has exited.
+  do {
+    bytes_read = posix::Read(read_fd(), &flag, 1);
+  } while (bytes_read == -1 && errno == EINTR);
+
+  if (bytes_read == 0) {
+    set_outcome(DIED);
+  } else if (bytes_read == 1) {
+    switch (flag) {
+      case kDeathTestReturned:
+        set_outcome(RETURNED);
+        break;
+      case kDeathTestThrew:
+        set_outcome(THREW);
+        break;
+      case kDeathTestLived:
+        set_outcome(LIVED);
+        break;
+      case kDeathTestInternalError:
+        FailFromInternalError(read_fd());  // Does not return.
+        break;
+      default:
+        GTEST_LOG_(FATAL) << "Death test child process reported "
+                          << "unexpected status byte ("
+                          << static_cast<unsigned int>(flag) << ")";
+    }
+  } else {
+    GTEST_LOG_(FATAL) << "Read from death test child process failed: "
+                      << GetLastErrnoDescription();
+  }
+  GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Close(read_fd()));
+  set_read_fd(-1);
+}
+
+std::string DeathTestImpl::GetErrorLogs() {
+  return GetCapturedStderr();
+}
+
+// Signals that the death test code which should have exited, didn't.
+// Should be called only in a death test child process.
+// Writes a status byte to the child's status file descriptor, then
+// calls _exit(1).
+void DeathTestImpl::Abort(AbortReason reason) {
+  // The parent process considers the death test to be a failure if
+  // it finds any data in our pipe.  So, here we write a single flag byte
+  // to the pipe, then exit.
+  const char status_ch =
+      reason == TEST_DID_NOT_DIE ? kDeathTestLived :
+      reason == TEST_THREW_EXCEPTION ? kDeathTestThrew : kDeathTestReturned;
+
+  GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Write(write_fd(), &status_ch, 1));
+  // We are leaking the descriptor here because on some platforms (i.e.,
+  // when built as Windows DLL), destructors of global objects will still
+  // run after calling _exit(). On such systems, write_fd_ will be
+  // indirectly closed from the destructor of UnitTestImpl, causing double
+  // close if it is also closed here. On debug configurations, double close
+  // may assert. As there are no in-process buffers to flush here, we are
+  // relying on the OS to close the descriptor after the process terminates
+  // when the destructors are not run.
+  _exit(1);  // Exits w/o any normal exit hooks (we were supposed to crash)
+}
+
+// Returns an indented copy of stderr output for a death test.
+// This makes distinguishing death test output lines from regular log lines
+// much easier.
+static ::std::string FormatDeathTestOutput(const ::std::string& output) {
+  ::std::string ret;
+  for (size_t at = 0; ; ) {
+    const size_t line_end = output.find('\n', at);
+    ret += "[  DEATH   ] ";
+    if (line_end == ::std::string::npos) {
+      ret += output.substr(at);
+      break;
+    }
+    ret += output.substr(at, line_end + 1 - at);
+    at = line_end + 1;
+  }
+  return ret;
+}
+
+// Assesses the success or failure of a death test, using both private
+// members which have previously been set, and one argument:
+//
+// Private data members:
+//   outcome:  An enumeration describing how the death test
+//             concluded: DIED, LIVED, THREW, or RETURNED.  The death test
+//             fails in the latter three cases.
+//   status:   The exit status of the child process. On *nix, it is in the
+//             in the format specified by wait(2). On Windows, this is the
+//             value supplied to the ExitProcess() API or a numeric code
+//             of the exception that terminated the program.
+//   matcher_: A matcher that's expected to match the stderr output by the child
+//             process.
+//
+// Argument:
+//   status_ok: true if exit_status is acceptable in the context of
+//              this particular death test, which fails if it is false
+//
+// Returns true if and only if all of the above conditions are met.  Otherwise,
+// the first failing condition, in the order given above, is the one that is
+// reported. Also sets the last death test message string.
+bool DeathTestImpl::Passed(bool status_ok) {
+  if (!spawned())
+    return false;
+
+  const std::string error_message = GetErrorLogs();
+
+  bool success = false;
+  Message buffer;
+
+  buffer << "Death test: " << statement() << "\n";
+  switch (outcome()) {
+    case LIVED:
+      buffer << "    Result: failed to die.\n"
+             << " Error msg:\n" << FormatDeathTestOutput(error_message);
+      break;
+    case THREW:
+      buffer << "    Result: threw an exception.\n"
+             << " Error msg:\n" << FormatDeathTestOutput(error_message);
+      break;
+    case RETURNED:
+      buffer << "    Result: illegal return in test statement.\n"
+             << " Error msg:\n" << FormatDeathTestOutput(error_message);
+      break;
+    case DIED:
+      if (status_ok) {
+        if (matcher_.Matches(error_message)) {
+          success = true;
+        } else {
+          std::ostringstream stream;
+          matcher_.DescribeTo(&stream);
+          buffer << "    Result: died but not with expected error.\n"
+                 << "  Expected: " << stream.str() << "\n"
+                 << "Actual msg:\n"
+                 << FormatDeathTestOutput(error_message);
+        }
+      } else {
+        buffer << "    Result: died but not with expected exit code:\n"
+               << "            " << ExitSummary(status()) << "\n"
+               << "Actual msg:\n" << FormatDeathTestOutput(error_message);
+      }
+      break;
+    case IN_PROGRESS:
+    default:
+      GTEST_LOG_(FATAL)
+          << "DeathTest::Passed somehow called before conclusion of test";
+  }
+
+  DeathTest::set_last_death_test_message(buffer.GetString());
+  return success;
+}
+
+# if GTEST_OS_WINDOWS
+// WindowsDeathTest implements death tests on Windows. Due to the
+// specifics of starting new processes on Windows, death tests there are
+// always threadsafe, and Google Test considers the
+// --gtest_death_test_style=fast setting to be equivalent to
+// --gtest_death_test_style=threadsafe there.
+//
+// A few implementation notes:  Like the Linux version, the Windows
+// implementation uses pipes for child-to-parent communication. But due to
+// the specifics of pipes on Windows, some extra steps are required:
+//
+// 1. The parent creates a communication pipe and stores handles to both
+//    ends of it.
+// 2. The parent starts the child and provides it with the information
+//    necessary to acquire the handle to the write end of the pipe.
+// 3. The child acquires the write end of the pipe and signals the parent
+//    using a Windows event.
+// 4. Now the parent can release the write end of the pipe on its side. If
+//    this is done before step 3, the object's reference count goes down to
+//    0 and it is destroyed, preventing the child from acquiring it. The
+//    parent now has to release it, or read operations on the read end of
+//    the pipe will not return when the child terminates.
+// 5. The parent reads child's output through the pipe (outcome code and
+//    any possible error messages) from the pipe, and its stderr and then
+//    determines whether to fail the test.
+//
+// Note: to distinguish Win32 API calls from the local method and function
+// calls, the former are explicitly resolved in the global namespace.
+//
+class WindowsDeathTest : public DeathTestImpl {
+ public:
+  WindowsDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
+                   const char* file, int line)
+      : DeathTestImpl(a_statement, std::move(matcher)),
+        file_(file),
+        line_(line) {}
+
+  // All of these virtual functions are inherited from DeathTest.
+  virtual int Wait();
+  virtual TestRole AssumeRole();
+
+ private:
+  // The name of the file in which the death test is located.
+  const char* const file_;
+  // The line number on which the death test is located.
+  const int line_;
+  // Handle to the write end of the pipe to the child process.
+  AutoHandle write_handle_;
+  // Child process handle.
+  AutoHandle child_handle_;
+  // Event the child process uses to signal the parent that it has
+  // acquired the handle to the write end of the pipe. After seeing this
+  // event the parent can release its own handles to make sure its
+  // ReadFile() calls return when the child terminates.
+  AutoHandle event_handle_;
+};
+
+// Waits for the child in a death test to exit, returning its exit
+// status, or 0 if no child process exists.  As a side effect, sets the
+// outcome data member.
+int WindowsDeathTest::Wait() {
+  if (!spawned())
+    return 0;
+
+  // Wait until the child either signals that it has acquired the write end
+  // of the pipe or it dies.
+  const HANDLE wait_handles[2] = { child_handle_.Get(), event_handle_.Get() };
+  switch (::WaitForMultipleObjects(2,
+                                   wait_handles,
+                                   FALSE,  // Waits for any of the handles.
+                                   INFINITE)) {
+    case WAIT_OBJECT_0:
+    case WAIT_OBJECT_0 + 1:
+      break;
+    default:
+      GTEST_DEATH_TEST_CHECK_(false);  // Should not get here.
+  }
+
+  // The child has acquired the write end of the pipe or exited.
+  // We release the handle on our side and continue.
+  write_handle_.Reset();
+  event_handle_.Reset();
+
+  ReadAndInterpretStatusByte();
+
+  // Waits for the child process to exit if it haven't already. This
+  // returns immediately if the child has already exited, regardless of
+  // whether previous calls to WaitForMultipleObjects synchronized on this
+  // handle or not.
+  GTEST_DEATH_TEST_CHECK_(
+      WAIT_OBJECT_0 == ::WaitForSingleObject(child_handle_.Get(),
+                                             INFINITE));
+  DWORD status_code;
+  GTEST_DEATH_TEST_CHECK_(
+      ::GetExitCodeProcess(child_handle_.Get(), &status_code) != FALSE);
+  child_handle_.Reset();
+  set_status(static_cast<int>(status_code));
+  return status();
+}
+
+// The AssumeRole process for a Windows death test.  It creates a child
+// process with the same executable as the current process to run the
+// death test.  The child process is given the --gtest_filter and
+// --gtest_internal_run_death_test flags such that it knows to run the
+// current death test only.
+DeathTest::TestRole WindowsDeathTest::AssumeRole() {
+  const UnitTestImpl* const impl = GetUnitTestImpl();
+  const InternalRunDeathTestFlag* const flag =
+      impl->internal_run_death_test_flag();
+  const TestInfo* const info = impl->current_test_info();
+  const int death_test_index = info->result()->death_test_count();
+
+  if (flag != nullptr) {
+    // ParseInternalRunDeathTestFlag() has performed all the necessary
+    // processing.
+    set_write_fd(flag->write_fd());
+    return EXECUTE_TEST;
+  }
+
+  // WindowsDeathTest uses an anonymous pipe to communicate results of
+  // a death test.
+  SECURITY_ATTRIBUTES handles_are_inheritable = {sizeof(SECURITY_ATTRIBUTES),
+                                                 nullptr, TRUE};
+  HANDLE read_handle, write_handle;
+  GTEST_DEATH_TEST_CHECK_(
+      ::CreatePipe(&read_handle, &write_handle, &handles_are_inheritable,
+                   0)  // Default buffer size.
+      != FALSE);
+  set_read_fd(::_open_osfhandle(reinterpret_cast<intptr_t>(read_handle),
+                                O_RDONLY));
+  write_handle_.Reset(write_handle);
+  event_handle_.Reset(::CreateEvent(
+      &handles_are_inheritable,
+      TRUE,       // The event will automatically reset to non-signaled state.
+      FALSE,      // The initial state is non-signalled.
+      nullptr));  // The even is unnamed.
+  GTEST_DEATH_TEST_CHECK_(event_handle_.Get() != nullptr);
+  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
+                                  kFilterFlag + "=" + info->test_suite_name() +
+                                  "." + info->name();
+  const std::string internal_flag =
+      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag +
+      "=" + file_ + "|" + StreamableToString(line_) + "|" +
+      StreamableToString(death_test_index) + "|" +
+      StreamableToString(static_cast<unsigned int>(::GetCurrentProcessId())) +
+      // size_t has the same width as pointers on both 32-bit and 64-bit
+      // Windows platforms.
+      // See http://msdn.microsoft.com/en-us/library/tcxf1dw6.aspx.
+      "|" + StreamableToString(reinterpret_cast<size_t>(write_handle)) +
+      "|" + StreamableToString(reinterpret_cast<size_t>(event_handle_.Get()));
+
+  char executable_path[_MAX_PATH + 1];  // NOLINT
+  GTEST_DEATH_TEST_CHECK_(_MAX_PATH + 1 != ::GetModuleFileNameA(nullptr,
+                                                                executable_path,
+                                                                _MAX_PATH));
+
+  std::string command_line =
+      std::string(::GetCommandLineA()) + " " + filter_flag + " \"" +
+      internal_flag + "\"";
+
+  DeathTest::set_last_death_test_message("");
+
+  CaptureStderr();
+  // Flush the log buffers since the log streams are shared with the child.
+  FlushInfoLog();
+
+  // The child process will share the standard handles with the parent.
+  STARTUPINFOA startup_info;
+  memset(&startup_info, 0, sizeof(STARTUPINFO));
+  startup_info.dwFlags = STARTF_USESTDHANDLES;
+  startup_info.hStdInput = ::GetStdHandle(STD_INPUT_HANDLE);
+  startup_info.hStdOutput = ::GetStdHandle(STD_OUTPUT_HANDLE);
+  startup_info.hStdError = ::GetStdHandle(STD_ERROR_HANDLE);
+
+  PROCESS_INFORMATION process_info;
+  GTEST_DEATH_TEST_CHECK_(
+      ::CreateProcessA(
+          executable_path, const_cast<char*>(command_line.c_str()),
+          nullptr,  // Retuned process handle is not inheritable.
+          nullptr,  // Retuned thread handle is not inheritable.
+          TRUE,  // Child inherits all inheritable handles (for write_handle_).
+          0x0,   // Default creation flags.
+          nullptr,  // Inherit the parent's environment.
+          UnitTest::GetInstance()->original_working_dir(), &startup_info,
+          &process_info) != FALSE);
+  child_handle_.Reset(process_info.hProcess);
+  ::CloseHandle(process_info.hThread);
+  set_spawned(true);
+  return OVERSEE_TEST;
+}
+
+# elif GTEST_OS_FUCHSIA
+
+class FuchsiaDeathTest : public DeathTestImpl {
+ public:
+  FuchsiaDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
+                   const char* file, int line)
+      : DeathTestImpl(a_statement, std::move(matcher)),
+        file_(file),
+        line_(line) {}
+
+  // All of these virtual functions are inherited from DeathTest.
+  int Wait() override;
+  TestRole AssumeRole() override;
+  std::string GetErrorLogs() override;
+
+ private:
+  // The name of the file in which the death test is located.
+  const char* const file_;
+  // The line number on which the death test is located.
+  const int line_;
+  // The stderr data captured by the child process.
+  std::string captured_stderr_;
+
+  zx::process child_process_;
+  zx::channel exception_channel_;
+  zx::socket stderr_socket_;
+};
+
+// Utility class for accumulating command-line arguments.
+class Arguments {
+ public:
+  Arguments() { args_.push_back(nullptr); }
+
+  ~Arguments() {
+    for (std::vector<char*>::iterator i = args_.begin(); i != args_.end();
+         ++i) {
+      free(*i);
+    }
+  }
+  void AddArgument(const char* argument) {
+    args_.insert(args_.end() - 1, posix::StrDup(argument));
+  }
+
+  template <typename Str>
+  void AddArguments(const ::std::vector<Str>& arguments) {
+    for (typename ::std::vector<Str>::const_iterator i = arguments.begin();
+         i != arguments.end();
+         ++i) {
+      args_.insert(args_.end() - 1, posix::StrDup(i->c_str()));
+    }
+  }
+  char* const* Argv() {
+    return &args_[0];
+  }
+
+  int size() {
+    return static_cast<int>(args_.size()) - 1;
+  }
+
+ private:
+  std::vector<char*> args_;
+};
+
+// Waits for the child in a death test to exit, returning its exit
+// status, or 0 if no child process exists.  As a side effect, sets the
+// outcome data member.
+int FuchsiaDeathTest::Wait() {
+  const int kProcessKey = 0;
+  const int kSocketKey = 1;
+  const int kExceptionKey = 2;
+
+  if (!spawned())
+    return 0;
+
+  // Create a port to wait for socket/task/exception events.
+  zx_status_t status_zx;
+  zx::port port;
+  status_zx = zx::port::create(0, &port);
+  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
+
+  // Register to wait for the child process to terminate.
+  status_zx = child_process_.wait_async(
+      port, kProcessKey, ZX_PROCESS_TERMINATED, 0);
+  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
+
+  // Register to wait for the socket to be readable or closed.
+  status_zx = stderr_socket_.wait_async(
+      port, kSocketKey, ZX_SOCKET_READABLE | ZX_SOCKET_PEER_CLOSED, 0);
+  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
+
+  // Register to wait for an exception.
+  status_zx = exception_channel_.wait_async(
+      port, kExceptionKey, ZX_CHANNEL_READABLE, 0);
+  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
+
+  bool process_terminated = false;
+  bool socket_closed = false;
+  do {
+    zx_port_packet_t packet = {};
+    status_zx = port.wait(zx::time::infinite(), &packet);
+    GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
+
+    if (packet.key == kExceptionKey) {
+      // Process encountered an exception. Kill it directly rather than
+      // letting other handlers process the event. We will get a kProcessKey
+      // event when the process actually terminates.
+      status_zx = child_process_.kill();
+      GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
+    } else if (packet.key == kProcessKey) {
+      // Process terminated.
+      GTEST_DEATH_TEST_CHECK_(ZX_PKT_IS_SIGNAL_ONE(packet.type));
+      GTEST_DEATH_TEST_CHECK_(packet.signal.observed & ZX_PROCESS_TERMINATED);
+      process_terminated = true;
+    } else if (packet.key == kSocketKey) {
+      GTEST_DEATH_TEST_CHECK_(ZX_PKT_IS_SIGNAL_ONE(packet.type));
+      if (packet.signal.observed & ZX_SOCKET_READABLE) {
+        // Read data from the socket.
+        constexpr size_t kBufferSize = 1024;
+        do {
+          size_t old_length = captured_stderr_.length();
+          size_t bytes_read = 0;
+          captured_stderr_.resize(old_length + kBufferSize);
+          status_zx = stderr_socket_.read(
+              0, &captured_stderr_.front() + old_length, kBufferSize,
+              &bytes_read);
+          captured_stderr_.resize(old_length + bytes_read);
+        } while (status_zx == ZX_OK);
+        if (status_zx == ZX_ERR_PEER_CLOSED) {
+          socket_closed = true;
+        } else {
+          GTEST_DEATH_TEST_CHECK_(status_zx == ZX_ERR_SHOULD_WAIT);
+          status_zx = stderr_socket_.wait_async(
+              port, kSocketKey, ZX_SOCKET_READABLE | ZX_SOCKET_PEER_CLOSED, 0);
+          GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
+        }
+      } else {
+        GTEST_DEATH_TEST_CHECK_(packet.signal.observed & ZX_SOCKET_PEER_CLOSED);
+        socket_closed = true;
+      }
+    }
+  } while (!process_terminated && !socket_closed);
+
+  ReadAndInterpretStatusByte();
+
+  zx_info_process_v2_t buffer;
+  status_zx = child_process_.get_info(
+      ZX_INFO_PROCESS_V2, &buffer, sizeof(buffer), nullptr, nullptr);
+  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
+
+  GTEST_DEATH_TEST_CHECK_(buffer.flags & ZX_INFO_PROCESS_FLAG_EXITED);
+  set_status(static_cast<int>(buffer.return_code));
+  return status();
+}
+
+// The AssumeRole process for a Fuchsia death test.  It creates a child
+// process with the same executable as the current process to run the
+// death test.  The child process is given the --gtest_filter and
+// --gtest_internal_run_death_test flags such that it knows to run the
+// current death test only.
+DeathTest::TestRole FuchsiaDeathTest::AssumeRole() {
+  const UnitTestImpl* const impl = GetUnitTestImpl();
+  const InternalRunDeathTestFlag* const flag =
+      impl->internal_run_death_test_flag();
+  const TestInfo* const info = impl->current_test_info();
+  const int death_test_index = info->result()->death_test_count();
+
+  if (flag != nullptr) {
+    // ParseInternalRunDeathTestFlag() has performed all the necessary
+    // processing.
+    set_write_fd(kFuchsiaReadPipeFd);
+    return EXECUTE_TEST;
+  }
+
+  // Flush the log buffers since the log streams are shared with the child.
+  FlushInfoLog();
+
+  // Build the child process command line.
+  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
+                                  kFilterFlag + "=" + info->test_suite_name() +
+                                  "." + info->name();
+  const std::string internal_flag =
+      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag + "="
+      + file_ + "|"
+      + StreamableToString(line_) + "|"
+      + StreamableToString(death_test_index);
+  Arguments args;
+  args.AddArguments(GetInjectableArgvs());
+  args.AddArgument(filter_flag.c_str());
+  args.AddArgument(internal_flag.c_str());
+
+  // Build the pipe for communication with the child.
+  zx_status_t status;
+  zx_handle_t child_pipe_handle;
+  int child_pipe_fd;
+  status = fdio_pipe_half(&child_pipe_fd, &child_pipe_handle);
+  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
+  set_read_fd(child_pipe_fd);
+
+  // Set the pipe handle for the child.
+  fdio_spawn_action_t spawn_actions[2] = {};
+  fdio_spawn_action_t* add_handle_action = &spawn_actions[0];
+  add_handle_action->action = FDIO_SPAWN_ACTION_ADD_HANDLE;
+  add_handle_action->h.id = PA_HND(PA_FD, kFuchsiaReadPipeFd);
+  add_handle_action->h.handle = child_pipe_handle;
+
+  // Create a socket pair will be used to receive the child process' stderr.
+  zx::socket stderr_producer_socket;
+  status =
+      zx::socket::create(0, &stderr_producer_socket, &stderr_socket_);
+  GTEST_DEATH_TEST_CHECK_(status >= 0);
+  int stderr_producer_fd = -1;
+  status =
+      fdio_fd_create(stderr_producer_socket.release(), &stderr_producer_fd);
+  GTEST_DEATH_TEST_CHECK_(status >= 0);
+
+  // Make the stderr socket nonblocking.
+  GTEST_DEATH_TEST_CHECK_(fcntl(stderr_producer_fd, F_SETFL, 0) == 0);
+
+  fdio_spawn_action_t* add_stderr_action = &spawn_actions[1];
+  add_stderr_action->action = FDIO_SPAWN_ACTION_CLONE_FD;
+  add_stderr_action->fd.local_fd = stderr_producer_fd;
+  add_stderr_action->fd.target_fd = STDERR_FILENO;
+
+  // Create a child job.
+  zx_handle_t child_job = ZX_HANDLE_INVALID;
+  status = zx_job_create(zx_job_default(), 0, & child_job);
+  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
+  zx_policy_basic_t policy;
+  policy.condition = ZX_POL_NEW_ANY;
+  policy.policy = ZX_POL_ACTION_ALLOW;
+  status = zx_job_set_policy(
+      child_job, ZX_JOB_POL_RELATIVE, ZX_JOB_POL_BASIC, &policy, 1);
+  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
+
+  // Create an exception channel attached to the |child_job|, to allow
+  // us to suppress the system default exception handler from firing.
+  status =
+      zx_task_create_exception_channel(
+          child_job, 0, exception_channel_.reset_and_get_address());
+  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
+
+  // Spawn the child process.
+  status = fdio_spawn_etc(
+      child_job, FDIO_SPAWN_CLONE_ALL, args.Argv()[0], args.Argv(), nullptr,
+      2, spawn_actions, child_process_.reset_and_get_address(), nullptr);
+  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
+
+  set_spawned(true);
+  return OVERSEE_TEST;
+}
+
+std::string FuchsiaDeathTest::GetErrorLogs() {
+  return captured_stderr_;
+}
+
+#else  // We are neither on Windows, nor on Fuchsia.
+
+// ForkingDeathTest provides implementations for most of the abstract
+// methods of the DeathTest interface.  Only the AssumeRole method is
+// left undefined.
+class ForkingDeathTest : public DeathTestImpl {
+ public:
+  ForkingDeathTest(const char* statement, Matcher<const std::string&> matcher);
+
+  // All of these virtual functions are inherited from DeathTest.
+  int Wait() override;
+
+ protected:
+  void set_child_pid(pid_t child_pid) { child_pid_ = child_pid; }
+
+ private:
+  // PID of child process during death test; 0 in the child process itself.
+  pid_t child_pid_;
+};
+
+// Constructs a ForkingDeathTest.
+ForkingDeathTest::ForkingDeathTest(const char* a_statement,
+                                   Matcher<const std::string&> matcher)
+    : DeathTestImpl(a_statement, std::move(matcher)), child_pid_(-1) {}
+
+// Waits for the child in a death test to exit, returning its exit
+// status, or 0 if no child process exists.  As a side effect, sets the
+// outcome data member.
+int ForkingDeathTest::Wait() {
+  if (!spawned())
+    return 0;
+
+  ReadAndInterpretStatusByte();
+
+  int status_value;
+  GTEST_DEATH_TEST_CHECK_SYSCALL_(waitpid(child_pid_, &status_value, 0));
+  set_status(status_value);
+  return status_value;
+}
+
+// A concrete death test class that forks, then immediately runs the test
+// in the child process.
+class NoExecDeathTest : public ForkingDeathTest {
+ public:
+  NoExecDeathTest(const char* a_statement, Matcher<const std::string&> matcher)
+      : ForkingDeathTest(a_statement, std::move(matcher)) {}
+  TestRole AssumeRole() override;
+};
+
+// The AssumeRole process for a fork-and-run death test.  It implements a
+// straightforward fork, with a simple pipe to transmit the status byte.
+DeathTest::TestRole NoExecDeathTest::AssumeRole() {
+  const size_t thread_count = GetThreadCount();
+  if (thread_count != 1) {
+    GTEST_LOG_(WARNING) << DeathTestThreadWarning(thread_count);
+  }
+
+  int pipe_fd[2];
+  GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1);
+
+  DeathTest::set_last_death_test_message("");
+  CaptureStderr();
+  // When we fork the process below, the log file buffers are copied, but the
+  // file descriptors are shared.  We flush all log files here so that closing
+  // the file descriptors in the child process doesn't throw off the
+  // synchronization between descriptors and buffers in the parent process.
+  // This is as close to the fork as possible to avoid a race condition in case
+  // there are multiple threads running before the death test, and another
+  // thread writes to the log file.
+  FlushInfoLog();
+
+  const pid_t child_pid = fork();
+  GTEST_DEATH_TEST_CHECK_(child_pid != -1);
+  set_child_pid(child_pid);
+  if (child_pid == 0) {
+    GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[0]));
+    set_write_fd(pipe_fd[1]);
+    // Redirects all logging to stderr in the child process to prevent
+    // concurrent writes to the log files.  We capture stderr in the parent
+    // process and append the child process' output to a log.
+    LogToStderr();
+    // Event forwarding to the listeners of event listener API mush be shut
+    // down in death test subprocesses.
+    GetUnitTestImpl()->listeners()->SuppressEventForwarding();
+    g_in_fast_death_test_child = true;
+    return EXECUTE_TEST;
+  } else {
+    GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
+    set_read_fd(pipe_fd[0]);
+    set_spawned(true);
+    return OVERSEE_TEST;
+  }
+}
+
+// A concrete death test class that forks and re-executes the main
+// program from the beginning, with command-line flags set that cause
+// only this specific death test to be run.
+class ExecDeathTest : public ForkingDeathTest {
+ public:
+  ExecDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
+                const char* file, int line)
+      : ForkingDeathTest(a_statement, std::move(matcher)),
+        file_(file),
+        line_(line) {}
+  TestRole AssumeRole() override;
+
+ private:
+  static ::std::vector<std::string> GetArgvsForDeathTestChildProcess() {
+    ::std::vector<std::string> args = GetInjectableArgvs();
+#  if defined(GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_)
+    ::std::vector<std::string> extra_args =
+        GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_();
+    args.insert(args.end(), extra_args.begin(), extra_args.end());
+#  endif  // defined(GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_)
+    return args;
+  }
+  // The name of the file in which the death test is located.
+  const char* const file_;
+  // The line number on which the death test is located.
+  const int line_;
+};
+
+// Utility class for accumulating command-line arguments.
+class Arguments {
+ public:
+  Arguments() { args_.push_back(nullptr); }
+
+  ~Arguments() {
+    for (std::vector<char*>::iterator i = args_.begin(); i != args_.end();
+         ++i) {
+      free(*i);
+    }
+  }
+  void AddArgument(const char* argument) {
+    args_.insert(args_.end() - 1, posix::StrDup(argument));
+  }
+
+  template <typename Str>
+  void AddArguments(const ::std::vector<Str>& arguments) {
+    for (typename ::std::vector<Str>::const_iterator i = arguments.begin();
+         i != arguments.end();
+         ++i) {
+      args_.insert(args_.end() - 1, posix::StrDup(i->c_str()));
+    }
+  }
+  char* const* Argv() {
+    return &args_[0];
+  }
+
+ private:
+  std::vector<char*> args_;
+};
+
+// A struct that encompasses the arguments to the child process of a
+// threadsafe-style death test process.
+struct ExecDeathTestArgs {
+  char* const* argv;  // Command-line arguments for the child's call to exec
+  int close_fd;       // File descriptor to close; the read end of a pipe
+};
+
+#  if GTEST_OS_QNX
+extern "C" char** environ;
+#  else  // GTEST_OS_QNX
+// The main function for a threadsafe-style death test child process.
+// This function is called in a clone()-ed process and thus must avoid
+// any potentially unsafe operations like malloc or libc functions.
+static int ExecDeathTestChildMain(void* child_arg) {
+  ExecDeathTestArgs* const args = static_cast<ExecDeathTestArgs*>(child_arg);
+  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(args->close_fd));
+
+  // We need to execute the test program in the same environment where
+  // it was originally invoked.  Therefore we change to the original
+  // working directory first.
+  const char* const original_dir =
+      UnitTest::GetInstance()->original_working_dir();
+  // We can safely call chdir() as it's a direct system call.
+  if (chdir(original_dir) != 0) {
+    DeathTestAbort(std::string("chdir(\"") + original_dir + "\") failed: " +
+                   GetLastErrnoDescription());
+    return EXIT_FAILURE;
+  }
+
+  // We can safely call execv() as it's almost a direct system call. We
+  // cannot use execvp() as it's a libc function and thus potentially
+  // unsafe.  Since execv() doesn't search the PATH, the user must
+  // invoke the test program via a valid path that contains at least
+  // one path separator.
+  execv(args->argv[0], args->argv);
+  DeathTestAbort(std::string("execv(") + args->argv[0] + ", ...) in " +
+                 original_dir + " failed: " +
+                 GetLastErrnoDescription());
+  return EXIT_FAILURE;
+}
+#  endif  // GTEST_OS_QNX
+
+#  if GTEST_HAS_CLONE
+// Two utility routines that together determine the direction the stack
+// grows.
+// This could be accomplished more elegantly by a single recursive
+// function, but we want to guard against the unlikely possibility of
+// a smart compiler optimizing the recursion away.
+//
+// GTEST_NO_INLINE_ is required to prevent GCC 4.6 from inlining
+// StackLowerThanAddress into StackGrowsDown, which then doesn't give
+// correct answer.
+static void StackLowerThanAddress(const void* ptr,
+                                  bool* result) GTEST_NO_INLINE_;
+// Make sure sanitizers do not tamper with the stack here.
+// Ideally, we want to use `__builtin_frame_address` instead of a local variable
+// address with sanitizer disabled, but it does not work when the
+// compiler optimizes the stack frame out, which happens on PowerPC targets.
+// HWAddressSanitizer add a random tag to the MSB of the local variable address,
+// making comparison result unpredictable.
+GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
+static void StackLowerThanAddress(const void* ptr, bool* result) {
+  int dummy = 0;
+  *result = std::less<const void*>()(&dummy, ptr);
+}
+
+// Make sure AddressSanitizer does not tamper with the stack here.
+GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
+static bool StackGrowsDown() {
+  int dummy = 0;
+  bool result;
+  StackLowerThanAddress(&dummy, &result);
+  return result;
+}
+#  endif  // GTEST_HAS_CLONE
+
+// Spawns a child process with the same executable as the current process in
+// a thread-safe manner and instructs it to run the death test.  The
+// implementation uses fork(2) + exec.  On systems where clone(2) is
+// available, it is used instead, being slightly more thread-safe.  On QNX,
+// fork supports only single-threaded environments, so this function uses
+// spawn(2) there instead.  The function dies with an error message if
+// anything goes wrong.
+static pid_t ExecDeathTestSpawnChild(char* const* argv, int close_fd) {
+  ExecDeathTestArgs args = { argv, close_fd };
+  pid_t child_pid = -1;
+
+#  if GTEST_OS_QNX
+  // Obtains the current directory and sets it to be closed in the child
+  // process.
+  const int cwd_fd = open(".", O_RDONLY);
+  GTEST_DEATH_TEST_CHECK_(cwd_fd != -1);
+  GTEST_DEATH_TEST_CHECK_SYSCALL_(fcntl(cwd_fd, F_SETFD, FD_CLOEXEC));
+  // We need to execute the test program in the same environment where
+  // it was originally invoked.  Therefore we change to the original
+  // working directory first.
+  const char* const original_dir =
+      UnitTest::GetInstance()->original_working_dir();
+  // We can safely call chdir() as it's a direct system call.
+  if (chdir(original_dir) != 0) {
+    DeathTestAbort(std::string("chdir(\"") + original_dir + "\") failed: " +
+                   GetLastErrnoDescription());
+    return EXIT_FAILURE;
+  }
+
+  int fd_flags;
+  // Set close_fd to be closed after spawn.
+  GTEST_DEATH_TEST_CHECK_SYSCALL_(fd_flags = fcntl(close_fd, F_GETFD));
+  GTEST_DEATH_TEST_CHECK_SYSCALL_(fcntl(close_fd, F_SETFD,
+                                        fd_flags | FD_CLOEXEC));
+  struct inheritance inherit = {0};
+  // spawn is a system call.
+  child_pid = spawn(args.argv[0], 0, nullptr, &inherit, args.argv, environ);
+  // Restores the current working directory.
+  GTEST_DEATH_TEST_CHECK_(fchdir(cwd_fd) != -1);
+  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(cwd_fd));
+
+#  else   // GTEST_OS_QNX
+#   if GTEST_OS_LINUX
+  // When a SIGPROF signal is received while fork() or clone() are executing,
+  // the process may hang. To avoid this, we ignore SIGPROF here and re-enable
+  // it after the call to fork()/clone() is complete.
+  struct sigaction saved_sigprof_action;
+  struct sigaction ignore_sigprof_action;
+  memset(&ignore_sigprof_action, 0, sizeof(ignore_sigprof_action));
+  sigemptyset(&ignore_sigprof_action.sa_mask);
+  ignore_sigprof_action.sa_handler = SIG_IGN;
+  GTEST_DEATH_TEST_CHECK_SYSCALL_(sigaction(
+      SIGPROF, &ignore_sigprof_action, &saved_sigprof_action));
+#   endif  // GTEST_OS_LINUX
+
+#   if GTEST_HAS_CLONE
+  const bool use_fork = GTEST_FLAG(death_test_use_fork);
+
+  if (!use_fork) {
+    static const bool stack_grows_down = StackGrowsDown();
+    const auto stack_size = static_cast<size_t>(getpagesize() * 2);
+    // MMAP_ANONYMOUS is not defined on Mac, so we use MAP_ANON instead.
+    void* const stack = mmap(nullptr, stack_size, PROT_READ | PROT_WRITE,
+                             MAP_ANON | MAP_PRIVATE, -1, 0);
+    GTEST_DEATH_TEST_CHECK_(stack != MAP_FAILED);
+
+    // Maximum stack alignment in bytes:  For a downward-growing stack, this
+    // amount is subtracted from size of the stack space to get an address
+    // that is within the stack space and is aligned on all systems we care
+    // about.  As far as I know there is no ABI with stack alignment greater
+    // than 64.  We assume stack and stack_size already have alignment of
+    // kMaxStackAlignment.
+    const size_t kMaxStackAlignment = 64;
+    void* const stack_top =
+        static_cast<char*>(stack) +
+            (stack_grows_down ? stack_size - kMaxStackAlignment : 0);
+    GTEST_DEATH_TEST_CHECK_(
+        static_cast<size_t>(stack_size) > kMaxStackAlignment &&
+        reinterpret_cast<uintptr_t>(stack_top) % kMaxStackAlignment == 0);
+
+    child_pid = clone(&ExecDeathTestChildMain, stack_top, SIGCHLD, &args);
+
+    GTEST_DEATH_TEST_CHECK_(munmap(stack, stack_size) != -1);
+  }
+#   else
+  const bool use_fork = true;
+#   endif  // GTEST_HAS_CLONE
+
+  if (use_fork && (child_pid = fork()) == 0) {
+      ExecDeathTestChildMain(&args);
+      _exit(0);
+  }
+#  endif  // GTEST_OS_QNX
+#  if GTEST_OS_LINUX
+  GTEST_DEATH_TEST_CHECK_SYSCALL_(
+      sigaction(SIGPROF, &saved_sigprof_action, nullptr));
+#  endif  // GTEST_OS_LINUX
+
+  GTEST_DEATH_TEST_CHECK_(child_pid != -1);
+  return child_pid;
+}
+
+// The AssumeRole process for a fork-and-exec death test.  It re-executes the
+// main program from the beginning, setting the --gtest_filter
+// and --gtest_internal_run_death_test flags to cause only the current
+// death test to be re-run.
+DeathTest::TestRole ExecDeathTest::AssumeRole() {
+  const UnitTestImpl* const impl = GetUnitTestImpl();
+  const InternalRunDeathTestFlag* const flag =
+      impl->internal_run_death_test_flag();
+  const TestInfo* const info = impl->current_test_info();
+  const int death_test_index = info->result()->death_test_count();
+
+  if (flag != nullptr) {
+    set_write_fd(flag->write_fd());
+    return EXECUTE_TEST;
+  }
+
+  int pipe_fd[2];
+  GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1);
+  // Clear the close-on-exec flag on the write end of the pipe, lest
+  // it be closed when the child process does an exec:
+  GTEST_DEATH_TEST_CHECK_(fcntl(pipe_fd[1], F_SETFD, 0) != -1);
+
+  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
+                                  kFilterFlag + "=" + info->test_suite_name() +
+                                  "." + info->name();
+  const std::string internal_flag =
+      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag + "="
+      + file_ + "|" + StreamableToString(line_) + "|"
+      + StreamableToString(death_test_index) + "|"
+      + StreamableToString(pipe_fd[1]);
+  Arguments args;
+  args.AddArguments(GetArgvsForDeathTestChildProcess());
+  args.AddArgument(filter_flag.c_str());
+  args.AddArgument(internal_flag.c_str());
+
+  DeathTest::set_last_death_test_message("");
+
+  CaptureStderr();
+  // See the comment in NoExecDeathTest::AssumeRole for why the next line
+  // is necessary.
+  FlushInfoLog();
+
+  const pid_t child_pid = ExecDeathTestSpawnChild(args.Argv(), pipe_fd[0]);
+  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
+  set_child_pid(child_pid);
+  set_read_fd(pipe_fd[0]);
+  set_spawned(true);
+  return OVERSEE_TEST;
+}
+
+# endif  // !GTEST_OS_WINDOWS
+
+// Creates a concrete DeathTest-derived class that depends on the
+// --gtest_death_test_style flag, and sets the pointer pointed to
+// by the "test" argument to its address.  If the test should be
+// skipped, sets that pointer to NULL.  Returns true, unless the
+// flag is set to an invalid value.
+bool DefaultDeathTestFactory::Create(const char* statement,
+                                     Matcher<const std::string&> matcher,
+                                     const char* file, int line,
+                                     DeathTest** test) {
+  UnitTestImpl* const impl = GetUnitTestImpl();
+  const InternalRunDeathTestFlag* const flag =
+      impl->internal_run_death_test_flag();
+  const int death_test_index = impl->current_test_info()
+      ->increment_death_test_count();
+
+  if (flag != nullptr) {
+    if (death_test_index > flag->index()) {
+      DeathTest::set_last_death_test_message(
+          "Death test count (" + StreamableToString(death_test_index)
+          + ") somehow exceeded expected maximum ("
+          + StreamableToString(flag->index()) + ")");
+      return false;
+    }
+
+    if (!(flag->file() == file && flag->line() == line &&
+          flag->index() == death_test_index)) {
+      *test = nullptr;
+      return true;
+    }
+  }
+
+# if GTEST_OS_WINDOWS
+
+  if (GTEST_FLAG(death_test_style) == "threadsafe" ||
+      GTEST_FLAG(death_test_style) == "fast") {
+    *test = new WindowsDeathTest(statement, std::move(matcher), file, line);
+  }
+
+# elif GTEST_OS_FUCHSIA
+
+  if (GTEST_FLAG(death_test_style) == "threadsafe" ||
+      GTEST_FLAG(death_test_style) == "fast") {
+    *test = new FuchsiaDeathTest(statement, std::move(matcher), file, line);
+  }
+
+# else
+
+  if (GTEST_FLAG(death_test_style) == "threadsafe") {
+    *test = new ExecDeathTest(statement, std::move(matcher), file, line);
+  } else if (GTEST_FLAG(death_test_style) == "fast") {
+    *test = new NoExecDeathTest(statement, std::move(matcher));
+  }
+
+# endif  // GTEST_OS_WINDOWS
+
+  else {  // NOLINT - this is more readable than unbalanced brackets inside #if.
+    DeathTest::set_last_death_test_message(
+        "Unknown death test style \"" + GTEST_FLAG(death_test_style)
+        + "\" encountered");
+    return false;
+  }
+
+  return true;
+}
+
+# if GTEST_OS_WINDOWS
+// Recreates the pipe and event handles from the provided parameters,
+// signals the event, and returns a file descriptor wrapped around the pipe
+// handle. This function is called in the child process only.
+static int GetStatusFileDescriptor(unsigned int parent_process_id,
+                            size_t write_handle_as_size_t,
+                            size_t event_handle_as_size_t) {
+  AutoHandle parent_process_handle(::OpenProcess(PROCESS_DUP_HANDLE,
+                                                   FALSE,  // Non-inheritable.
+                                                   parent_process_id));
+  if (parent_process_handle.Get() == INVALID_HANDLE_VALUE) {
+    DeathTestAbort("Unable to open parent process " +
+                   StreamableToString(parent_process_id));
+  }
+
+  GTEST_CHECK_(sizeof(HANDLE) <= sizeof(size_t));
+
+  const HANDLE write_handle =
+      reinterpret_cast<HANDLE>(write_handle_as_size_t);
+  HANDLE dup_write_handle;
+
+  // The newly initialized handle is accessible only in the parent
+  // process. To obtain one accessible within the child, we need to use
+  // DuplicateHandle.
+  if (!::DuplicateHandle(parent_process_handle.Get(), write_handle,
+                         ::GetCurrentProcess(), &dup_write_handle,
+                         0x0,    // Requested privileges ignored since
+                                 // DUPLICATE_SAME_ACCESS is used.
+                         FALSE,  // Request non-inheritable handler.
+                         DUPLICATE_SAME_ACCESS)) {
+    DeathTestAbort("Unable to duplicate the pipe handle " +
+                   StreamableToString(write_handle_as_size_t) +
+                   " from the parent process " +
+                   StreamableToString(parent_process_id));
+  }
+
+  const HANDLE event_handle = reinterpret_cast<HANDLE>(event_handle_as_size_t);
+  HANDLE dup_event_handle;
+
+  if (!::DuplicateHandle(parent_process_handle.Get(), event_handle,
+                         ::GetCurrentProcess(), &dup_event_handle,
+                         0x0,
+                         FALSE,
+                         DUPLICATE_SAME_ACCESS)) {
+    DeathTestAbort("Unable to duplicate the event handle " +
+                   StreamableToString(event_handle_as_size_t) +
+                   " from the parent process " +
+                   StreamableToString(parent_process_id));
+  }
+
+  const int write_fd =
+      ::_open_osfhandle(reinterpret_cast<intptr_t>(dup_write_handle), O_APPEND);
+  if (write_fd == -1) {
+    DeathTestAbort("Unable to convert pipe handle " +
+                   StreamableToString(write_handle_as_size_t) +
+                   " to a file descriptor");
+  }
+
+  // Signals the parent that the write end of the pipe has been acquired
+  // so the parent can release its own write end.
+  ::SetEvent(dup_event_handle);
+
+  return write_fd;
+}
+# endif  // GTEST_OS_WINDOWS
+
+// Returns a newly created InternalRunDeathTestFlag object with fields
+// initialized from the GTEST_FLAG(internal_run_death_test) flag if
+// the flag is specified; otherwise returns NULL.
+InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag() {
+  if (GTEST_FLAG(internal_run_death_test) == "") return nullptr;
+
+  // GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we
+  // can use it here.
+  int line = -1;
+  int index = -1;
+  ::std::vector< ::std::string> fields;
+  SplitString(GTEST_FLAG(internal_run_death_test).c_str(), '|', &fields);
+  int write_fd = -1;
+
+# if GTEST_OS_WINDOWS
+
+  unsigned int parent_process_id = 0;
+  size_t write_handle_as_size_t = 0;
+  size_t event_handle_as_size_t = 0;
+
+  if (fields.size() != 6
+      || !ParseNaturalNumber(fields[1], &line)
+      || !ParseNaturalNumber(fields[2], &index)
+      || !ParseNaturalNumber(fields[3], &parent_process_id)
+      || !ParseNaturalNumber(fields[4], &write_handle_as_size_t)
+      || !ParseNaturalNumber(fields[5], &event_handle_as_size_t)) {
+    DeathTestAbort("Bad --gtest_internal_run_death_test flag: " +
+                   GTEST_FLAG(internal_run_death_test));
+  }
+  write_fd = GetStatusFileDescriptor(parent_process_id,
+                                     write_handle_as_size_t,
+                                     event_handle_as_size_t);
+
+# elif GTEST_OS_FUCHSIA
+
+  if (fields.size() != 3
+      || !ParseNaturalNumber(fields[1], &line)
+      || !ParseNaturalNumber(fields[2], &index)) {
+    DeathTestAbort("Bad --gtest_internal_run_death_test flag: "
+        + GTEST_FLAG(internal_run_death_test));
+  }
+
+# else
+
+  if (fields.size() != 4
+      || !ParseNaturalNumber(fields[1], &line)
+      || !ParseNaturalNumber(fields[2], &index)
+      || !ParseNaturalNumber(fields[3], &write_fd)) {
+    DeathTestAbort("Bad --gtest_internal_run_death_test flag: "
+        + GTEST_FLAG(internal_run_death_test));
+  }
+
+# endif  // GTEST_OS_WINDOWS
+
+  return new InternalRunDeathTestFlag(fields[0], line, index, write_fd);
+}
+
+}  // namespace internal
+
+#endif  // GTEST_HAS_DEATH_TEST
+
+}  // namespace testing
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+#include <stdlib.h>
+
+#if GTEST_OS_WINDOWS_MOBILE
+# include <windows.h>
+#elif GTEST_OS_WINDOWS
+# include <direct.h>
+# include <io.h>
+#else
+# include <limits.h>
+# include <climits>  // Some Linux distributions define PATH_MAX here.
+#endif  // GTEST_OS_WINDOWS_MOBILE
+
+
+#if GTEST_OS_WINDOWS
+# define GTEST_PATH_MAX_ _MAX_PATH
+#elif defined(PATH_MAX)
+# define GTEST_PATH_MAX_ PATH_MAX
+#elif defined(_XOPEN_PATH_MAX)
+# define GTEST_PATH_MAX_ _XOPEN_PATH_MAX
+#else
+# define GTEST_PATH_MAX_ _POSIX_PATH_MAX
+#endif  // GTEST_OS_WINDOWS
+
+namespace testing {
+namespace internal {
+
+#if GTEST_OS_WINDOWS
+// On Windows, '\\' is the standard path separator, but many tools and the
+// Windows API also accept '/' as an alternate path separator. Unless otherwise
+// noted, a file path can contain either kind of path separators, or a mixture
+// of them.
+const char kPathSeparator = '\\';
+const char kAlternatePathSeparator = '/';
+const char kAlternatePathSeparatorString[] = "/";
+# if GTEST_OS_WINDOWS_MOBILE
+// Windows CE doesn't have a current directory. You should not use
+// the current directory in tests on Windows CE, but this at least
+// provides a reasonable fallback.
+const char kCurrentDirectoryString[] = "\\";
+// Windows CE doesn't define INVALID_FILE_ATTRIBUTES
+const DWORD kInvalidFileAttributes = 0xffffffff;
+# else
+const char kCurrentDirectoryString[] = ".\\";
+# endif  // GTEST_OS_WINDOWS_MOBILE
+#else
+const char kPathSeparator = '/';
+const char kCurrentDirectoryString[] = "./";
+#endif  // GTEST_OS_WINDOWS
+
+// Returns whether the given character is a valid path separator.
+static bool IsPathSeparator(char c) {
+#if GTEST_HAS_ALT_PATH_SEP_
+  return (c == kPathSeparator) || (c == kAlternatePathSeparator);
+#else
+  return c == kPathSeparator;
+#endif
+}
+
+// Returns the current working directory, or "" if unsuccessful.
+FilePath FilePath::GetCurrentDir() {
+#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE ||         \
+    GTEST_OS_WINDOWS_RT || GTEST_OS_ESP8266 || GTEST_OS_ESP32 || \
+    GTEST_OS_XTENSA
+  // These platforms do not have a current directory, so we just return
+  // something reasonable.
+  return FilePath(kCurrentDirectoryString);
+#elif GTEST_OS_WINDOWS
+  char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
+  return FilePath(_getcwd(cwd, sizeof(cwd)) == nullptr ? "" : cwd);
+#else
+  char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
+  char* result = getcwd(cwd, sizeof(cwd));
+# if GTEST_OS_NACL
+  // getcwd will likely fail in NaCl due to the sandbox, so return something
+  // reasonable. The user may have provided a shim implementation for getcwd,
+  // however, so fallback only when failure is detected.
+  return FilePath(result == nullptr ? kCurrentDirectoryString : cwd);
+# endif  // GTEST_OS_NACL
+  return FilePath(result == nullptr ? "" : cwd);
+#endif  // GTEST_OS_WINDOWS_MOBILE
+}
+
+// Returns a copy of the FilePath with the case-insensitive extension removed.
+// Example: FilePath("dir/file.exe").RemoveExtension("EXE") returns
+// FilePath("dir/file"). If a case-insensitive extension is not
+// found, returns a copy of the original FilePath.
+FilePath FilePath::RemoveExtension(const char* extension) const {
+  const std::string dot_extension = std::string(".") + extension;
+  if (String::EndsWithCaseInsensitive(pathname_, dot_extension)) {
+    return FilePath(pathname_.substr(
+        0, pathname_.length() - dot_extension.length()));
+  }
+  return *this;
+}
+
+// Returns a pointer to the last occurrence of a valid path separator in
+// the FilePath. On Windows, for example, both '/' and '\' are valid path
+// separators. Returns NULL if no path separator was found.
+const char* FilePath::FindLastPathSeparator() const {
+  const char* const last_sep = strrchr(c_str(), kPathSeparator);
+#if GTEST_HAS_ALT_PATH_SEP_
+  const char* const last_alt_sep = strrchr(c_str(), kAlternatePathSeparator);
+  // Comparing two pointers of which only one is NULL is undefined.
+  if (last_alt_sep != nullptr &&
+      (last_sep == nullptr || last_alt_sep > last_sep)) {
+    return last_alt_sep;
+  }
+#endif
+  return last_sep;
+}
+
+// Returns a copy of the FilePath with the directory part removed.
+// Example: FilePath("path/to/file").RemoveDirectoryName() returns
+// FilePath("file"). If there is no directory part ("just_a_file"), it returns
+// the FilePath unmodified. If there is no file part ("just_a_dir/") it
+// returns an empty FilePath ("").
+// On Windows platform, '\' is the path separator, otherwise it is '/'.
+FilePath FilePath::RemoveDirectoryName() const {
+  const char* const last_sep = FindLastPathSeparator();
+  return last_sep ? FilePath(last_sep + 1) : *this;
+}
+
+// RemoveFileName returns the directory path with the filename removed.
+// Example: FilePath("path/to/file").RemoveFileName() returns "path/to/".
+// If the FilePath is "a_file" or "/a_file", RemoveFileName returns
+// FilePath("./") or, on Windows, FilePath(".\\"). If the filepath does
+// not have a file, like "just/a/dir/", it returns the FilePath unmodified.
+// On Windows platform, '\' is the path separator, otherwise it is '/'.
+FilePath FilePath::RemoveFileName() const {
+  const char* const last_sep = FindLastPathSeparator();
+  std::string dir;
+  if (last_sep) {
+    dir = std::string(c_str(), static_cast<size_t>(last_sep + 1 - c_str()));
+  } else {
+    dir = kCurrentDirectoryString;
+  }
+  return FilePath(dir);
+}
+
+// Helper functions for naming files in a directory for xml output.
+
+// Given directory = "dir", base_name = "test", number = 0,
+// extension = "xml", returns "dir/test.xml". If number is greater
+// than zero (e.g., 12), returns "dir/test_12.xml".
+// On Windows platform, uses \ as the separator rather than /.
+FilePath FilePath::MakeFileName(const FilePath& directory,
+                                const FilePath& base_name,
+                                int number,
+                                const char* extension) {
+  std::string file;
+  if (number == 0) {
+    file = base_name.string() + "." + extension;
+  } else {
+    file = base_name.string() + "_" + StreamableToString(number)
+        + "." + extension;
+  }
+  return ConcatPaths(directory, FilePath(file));
+}
+
+// Given directory = "dir", relative_path = "test.xml", returns "dir/test.xml".
+// On Windows, uses \ as the separator rather than /.
+FilePath FilePath::ConcatPaths(const FilePath& directory,
+                               const FilePath& relative_path) {
+  if (directory.IsEmpty())
+    return relative_path;
+  const FilePath dir(directory.RemoveTrailingPathSeparator());
+  return FilePath(dir.string() + kPathSeparator + relative_path.string());
+}
+
+// Returns true if pathname describes something findable in the file-system,
+// either a file, directory, or whatever.
+bool FilePath::FileOrDirectoryExists() const {
+#if GTEST_OS_WINDOWS_MOBILE
+  LPCWSTR unicode = String::AnsiToUtf16(pathname_.c_str());
+  const DWORD attributes = GetFileAttributes(unicode);
+  delete [] unicode;
+  return attributes != kInvalidFileAttributes;
+#else
+  posix::StatStruct file_stat;
+  return posix::Stat(pathname_.c_str(), &file_stat) == 0;
+#endif  // GTEST_OS_WINDOWS_MOBILE
+}
+
+// Returns true if pathname describes a directory in the file-system
+// that exists.
+bool FilePath::DirectoryExists() const {
+  bool result = false;
+#if GTEST_OS_WINDOWS
+  // Don't strip off trailing separator if path is a root directory on
+  // Windows (like "C:\\").
+  const FilePath& path(IsRootDirectory() ? *this :
+                                           RemoveTrailingPathSeparator());
+#else
+  const FilePath& path(*this);
+#endif
+
+#if GTEST_OS_WINDOWS_MOBILE
+  LPCWSTR unicode = String::AnsiToUtf16(path.c_str());
+  const DWORD attributes = GetFileAttributes(unicode);
+  delete [] unicode;
+  if ((attributes != kInvalidFileAttributes) &&
+      (attributes & FILE_ATTRIBUTE_DIRECTORY)) {
+    result = true;
+  }
+#else
+  posix::StatStruct file_stat;
+  result = posix::Stat(path.c_str(), &file_stat) == 0 &&
+      posix::IsDir(file_stat);
+#endif  // GTEST_OS_WINDOWS_MOBILE
+
+  return result;
+}
+
+// Returns true if pathname describes a root directory. (Windows has one
+// root directory per disk drive.)
+bool FilePath::IsRootDirectory() const {
+#if GTEST_OS_WINDOWS
+  return pathname_.length() == 3 && IsAbsolutePath();
+#else
+  return pathname_.length() == 1 && IsPathSeparator(pathname_.c_str()[0]);
+#endif
+}
+
+// Returns true if pathname describes an absolute path.
+bool FilePath::IsAbsolutePath() const {
+  const char* const name = pathname_.c_str();
+#if GTEST_OS_WINDOWS
+  return pathname_.length() >= 3 &&
+     ((name[0] >= 'a' && name[0] <= 'z') ||
+      (name[0] >= 'A' && name[0] <= 'Z')) &&
+     name[1] == ':' &&
+     IsPathSeparator(name[2]);
+#else
+  return IsPathSeparator(name[0]);
+#endif
+}
+
+// Returns a pathname for a file that does not currently exist. The pathname
+// will be directory/base_name.extension or
+// directory/base_name_<number>.extension if directory/base_name.extension
+// already exists. The number will be incremented until a pathname is found
+// that does not already exist.
+// Examples: 'dir/foo_test.xml' or 'dir/foo_test_1.xml'.
+// There could be a race condition if two or more processes are calling this
+// function at the same time -- they could both pick the same filename.
+FilePath FilePath::GenerateUniqueFileName(const FilePath& directory,
+                                          const FilePath& base_name,
+                                          const char* extension) {
+  FilePath full_pathname;
+  int number = 0;
+  do {
+    full_pathname.Set(MakeFileName(directory, base_name, number++, extension));
+  } while (full_pathname.FileOrDirectoryExists());
+  return full_pathname;
+}
+
+// Returns true if FilePath ends with a path separator, which indicates that
+// it is intended to represent a directory. Returns false otherwise.
+// This does NOT check that a directory (or file) actually exists.
+bool FilePath::IsDirectory() const {
+  return !pathname_.empty() &&
+         IsPathSeparator(pathname_.c_str()[pathname_.length() - 1]);
+}
+
+// Create directories so that path exists. Returns true if successful or if
+// the directories already exist; returns false if unable to create directories
+// for any reason.
+bool FilePath::CreateDirectoriesRecursively() const {
+  if (!this->IsDirectory()) {
+    return false;
+  }
+
+  if (pathname_.length() == 0 || this->DirectoryExists()) {
+    return true;
+  }
+
+  const FilePath parent(this->RemoveTrailingPathSeparator().RemoveFileName());
+  return parent.CreateDirectoriesRecursively() && this->CreateFolder();
+}
+
+// Create the directory so that path exists. Returns true if successful or
+// if the directory already exists; returns false if unable to create the
+// directory for any reason, including if the parent directory does not
+// exist. Not named "CreateDirectory" because that's a macro on Windows.
+bool FilePath::CreateFolder() const {
+#if GTEST_OS_WINDOWS_MOBILE
+  FilePath removed_sep(this->RemoveTrailingPathSeparator());
+  LPCWSTR unicode = String::AnsiToUtf16(removed_sep.c_str());
+  int result = CreateDirectory(unicode, nullptr) ? 0 : -1;
+  delete [] unicode;
+#elif GTEST_OS_WINDOWS
+  int result = _mkdir(pathname_.c_str());
+#elif GTEST_OS_ESP8266 || GTEST_OS_XTENSA
+  // do nothing
+  int result = 0;
+#else
+  int result = mkdir(pathname_.c_str(), 0777);
+#endif  // GTEST_OS_WINDOWS_MOBILE
+
+  if (result == -1) {
+    return this->DirectoryExists();  // An error is OK if the directory exists.
+  }
+  return true;  // No error.
+}
+
+// If input name has a trailing separator character, remove it and return the
+// name, otherwise return the name string unmodified.
+// On Windows platform, uses \ as the separator, other platforms use /.
+FilePath FilePath::RemoveTrailingPathSeparator() const {
+  return IsDirectory()
+      ? FilePath(pathname_.substr(0, pathname_.length() - 1))
+      : *this;
+}
+
+// Removes any redundant separators that might be in the pathname.
+// For example, "bar///foo" becomes "bar/foo". Does not eliminate other
+// redundancies that might be in a pathname involving "." or "..".
+void FilePath::Normalize() {
+  auto out = pathname_.begin();
+
+  for (const char character : pathname_) {
+    if (!IsPathSeparator(character)) {
+      *(out++) = character;
+    } else if (out == pathname_.begin() || *std::prev(out) != kPathSeparator) {
+      *(out++) = kPathSeparator;
+    } else {
+      continue;
+    }
+  }
+
+  pathname_.erase(out, pathname_.end());
+}
+
+}  // namespace internal
+}  // namespace testing
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// The Google C++ Testing and Mocking Framework (Google Test)
+//
+// This file implements just enough of the matcher interface to allow
+// EXPECT_DEATH and friends to accept a matcher argument.
+
+
+#include <string>
+
+namespace testing {
+
+// Constructs a matcher that matches a const std::string& whose value is
+// equal to s.
+Matcher<const std::string&>::Matcher(const std::string& s) { *this = Eq(s); }
+
+// Constructs a matcher that matches a const std::string& whose value is
+// equal to s.
+Matcher<const std::string&>::Matcher(const char* s) {
+  *this = Eq(std::string(s));
+}
+
+// Constructs a matcher that matches a std::string whose value is equal to
+// s.
+Matcher<std::string>::Matcher(const std::string& s) { *this = Eq(s); }
+
+// Constructs a matcher that matches a std::string whose value is equal to
+// s.
+Matcher<std::string>::Matcher(const char* s) { *this = Eq(std::string(s)); }
+
+#if GTEST_INTERNAL_HAS_STRING_VIEW
+// Constructs a matcher that matches a const StringView& whose value is
+// equal to s.
+Matcher<const internal::StringView&>::Matcher(const std::string& s) {
+  *this = Eq(s);
+}
+
+// Constructs a matcher that matches a const StringView& whose value is
+// equal to s.
+Matcher<const internal::StringView&>::Matcher(const char* s) {
+  *this = Eq(std::string(s));
+}
+
+// Constructs a matcher that matches a const StringView& whose value is
+// equal to s.
+Matcher<const internal::StringView&>::Matcher(internal::StringView s) {
+  *this = Eq(std::string(s));
+}
+
+// Constructs a matcher that matches a StringView whose value is equal to
+// s.
+Matcher<internal::StringView>::Matcher(const std::string& s) { *this = Eq(s); }
+
+// Constructs a matcher that matches a StringView whose value is equal to
+// s.
+Matcher<internal::StringView>::Matcher(const char* s) {
+  *this = Eq(std::string(s));
+}
+
+// Constructs a matcher that matches a StringView whose value is equal to
+// s.
+Matcher<internal::StringView>::Matcher(internal::StringView s) {
+  *this = Eq(std::string(s));
+}
+#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
+
+}  // namespace testing
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <cstdint>
+#include <fstream>
+#include <memory>
+
+#if GTEST_OS_WINDOWS
+# include <windows.h>
+# include <io.h>
+# include <sys/stat.h>
+# include <map>  // Used in ThreadLocal.
+# ifdef _MSC_VER
+#  include <crtdbg.h>
+# endif  // _MSC_VER
+#else
+# include <unistd.h>
+#endif  // GTEST_OS_WINDOWS
+
+#if GTEST_OS_MAC
+# include <mach/mach_init.h>
+# include <mach/task.h>
+# include <mach/vm_map.h>
+#endif  // GTEST_OS_MAC
+
+#if GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
+    GTEST_OS_NETBSD || GTEST_OS_OPENBSD
+# include <sys/sysctl.h>
+# if GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD
+#  include <sys/user.h>
+# endif
+#endif
+
+#if GTEST_OS_QNX
+# include <devctl.h>
+# include <fcntl.h>
+# include <sys/procfs.h>
+#endif  // GTEST_OS_QNX
+
+#if GTEST_OS_AIX
+# include <procinfo.h>
+# include <sys/types.h>
+#endif  // GTEST_OS_AIX
+
+#if GTEST_OS_FUCHSIA
+# include <zircon/process.h>
+# include <zircon/syscalls.h>
+#endif  // GTEST_OS_FUCHSIA
+
+
+namespace testing {
+namespace internal {
+
+#if defined(_MSC_VER) || defined(__BORLANDC__)
+// MSVC and C++Builder do not provide a definition of STDERR_FILENO.
+const int kStdOutFileno = 1;
+const int kStdErrFileno = 2;
+#else
+const int kStdOutFileno = STDOUT_FILENO;
+const int kStdErrFileno = STDERR_FILENO;
+#endif  // _MSC_VER
+
+#if GTEST_OS_LINUX
+
+namespace {
+template <typename T>
+T ReadProcFileField(const std::string& filename, int field) {
+  std::string dummy;
+  std::ifstream file(filename.c_str());
+  while (field-- > 0) {
+    file >> dummy;
+  }
+  T output = 0;
+  file >> output;
+  return output;
+}
+}  // namespace
+
+// Returns the number of active threads, or 0 when there is an error.
+size_t GetThreadCount() {
+  const std::string filename =
+      (Message() << "/proc/" << getpid() << "/stat").GetString();
+  return ReadProcFileField<size_t>(filename, 19);
+}
+
+#elif GTEST_OS_MAC
+
+size_t GetThreadCount() {
+  const task_t task = mach_task_self();
+  mach_msg_type_number_t thread_count;
+  thread_act_array_t thread_list;
+  const kern_return_t status = task_threads(task, &thread_list, &thread_count);
+  if (status == KERN_SUCCESS) {
+    // task_threads allocates resources in thread_list and we need to free them
+    // to avoid leaks.
+    vm_deallocate(task,
+                  reinterpret_cast<vm_address_t>(thread_list),
+                  sizeof(thread_t) * thread_count);
+    return static_cast<size_t>(thread_count);
+  } else {
+    return 0;
+  }
+}
+
+#elif GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
+      GTEST_OS_NETBSD
+
+#if GTEST_OS_NETBSD
+#undef KERN_PROC
+#define KERN_PROC KERN_PROC2
+#define kinfo_proc kinfo_proc2
+#endif
+
+#if GTEST_OS_DRAGONFLY
+#define KP_NLWP(kp) (kp.kp_nthreads)
+#elif GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD
+#define KP_NLWP(kp) (kp.ki_numthreads)
+#elif GTEST_OS_NETBSD
+#define KP_NLWP(kp) (kp.p_nlwps)
+#endif
+
+// Returns the number of threads running in the process, or 0 to indicate that
+// we cannot detect it.
+size_t GetThreadCount() {
+  int mib[] = {
+    CTL_KERN,
+    KERN_PROC,
+    KERN_PROC_PID,
+    getpid(),
+#if GTEST_OS_NETBSD
+    sizeof(struct kinfo_proc),
+    1,
+#endif
+  };
+  u_int miblen = sizeof(mib) / sizeof(mib[0]);
+  struct kinfo_proc info;
+  size_t size = sizeof(info);
+  if (sysctl(mib, miblen, &info, &size, NULL, 0)) {
+    return 0;
+  }
+  return static_cast<size_t>(KP_NLWP(info));
+}
+#elif GTEST_OS_OPENBSD
+
+// Returns the number of threads running in the process, or 0 to indicate that
+// we cannot detect it.
+size_t GetThreadCount() {
+  int mib[] = {
+    CTL_KERN,
+    KERN_PROC,
+    KERN_PROC_PID | KERN_PROC_SHOW_THREADS,
+    getpid(),
+    sizeof(struct kinfo_proc),
+    0,
+  };
+  u_int miblen = sizeof(mib) / sizeof(mib[0]);
+
+  // get number of structs
+  size_t size;
+  if (sysctl(mib, miblen, NULL, &size, NULL, 0)) {
+    return 0;
+  }
+
+  mib[5] = static_cast<int>(size / static_cast<size_t>(mib[4]));
+
+  // populate array of structs
+  struct kinfo_proc info[mib[5]];
+  if (sysctl(mib, miblen, &info, &size, NULL, 0)) {
+    return 0;
+  }
+
+  // exclude empty members
+  size_t nthreads = 0;
+  for (size_t i = 0; i < size / static_cast<size_t>(mib[4]); i++) {
+    if (info[i].p_tid != -1)
+      nthreads++;
+  }
+  return nthreads;
+}
+
+#elif GTEST_OS_QNX
+
+// Returns the number of threads running in the process, or 0 to indicate that
+// we cannot detect it.
+size_t GetThreadCount() {
+  const int fd = open("/proc/self/as", O_RDONLY);
+  if (fd < 0) {
+    return 0;
+  }
+  procfs_info process_info;
+  const int status =
+      devctl(fd, DCMD_PROC_INFO, &process_info, sizeof(process_info), nullptr);
+  close(fd);
+  if (status == EOK) {
+    return static_cast<size_t>(process_info.num_threads);
+  } else {
+    return 0;
+  }
+}
+
+#elif GTEST_OS_AIX
+
+size_t GetThreadCount() {
+  struct procentry64 entry;
+  pid_t pid = getpid();
+  int status = getprocs64(&entry, sizeof(entry), nullptr, 0, &pid, 1);
+  if (status == 1) {
+    return entry.pi_thcount;
+  } else {
+    return 0;
+  }
+}
+
+#elif GTEST_OS_FUCHSIA
+
+size_t GetThreadCount() {
+  int dummy_buffer;
+  size_t avail;
+  zx_status_t status = zx_object_get_info(
+      zx_process_self(),
+      ZX_INFO_PROCESS_THREADS,
+      &dummy_buffer,
+      0,
+      nullptr,
+      &avail);
+  if (status == ZX_OK) {
+    return avail;
+  } else {
+    return 0;
+  }
+}
+
+#else
+
+size_t GetThreadCount() {
+  // There's no portable way to detect the number of threads, so we just
+  // return 0 to indicate that we cannot detect it.
+  return 0;
+}
+
+#endif  // GTEST_OS_LINUX
+
+#if GTEST_IS_THREADSAFE && GTEST_OS_WINDOWS
+
+void SleepMilliseconds(int n) {
+  ::Sleep(static_cast<DWORD>(n));
+}
+
+AutoHandle::AutoHandle()
+    : handle_(INVALID_HANDLE_VALUE) {}
+
+AutoHandle::AutoHandle(Handle handle)
+    : handle_(handle) {}
+
+AutoHandle::~AutoHandle() {
+  Reset();
+}
+
+AutoHandle::Handle AutoHandle::Get() const {
+  return handle_;
+}
+
+void AutoHandle::Reset() {
+  Reset(INVALID_HANDLE_VALUE);
+}
+
+void AutoHandle::Reset(HANDLE handle) {
+  // Resetting with the same handle we already own is invalid.
+  if (handle_ != handle) {
+    if (IsCloseable()) {
+      ::CloseHandle(handle_);
+    }
+    handle_ = handle;
+  } else {
+    GTEST_CHECK_(!IsCloseable())
+        << "Resetting a valid handle to itself is likely a programmer error "
+            "and thus not allowed.";
+  }
+}
+
+bool AutoHandle::IsCloseable() const {
+  // Different Windows APIs may use either of these values to represent an
+  // invalid handle.
+  return handle_ != nullptr && handle_ != INVALID_HANDLE_VALUE;
+}
+
+Notification::Notification()
+    : event_(::CreateEvent(nullptr,     // Default security attributes.
+                           TRUE,        // Do not reset automatically.
+                           FALSE,       // Initially unset.
+                           nullptr)) {  // Anonymous event.
+  GTEST_CHECK_(event_.Get() != nullptr);
+}
+
+void Notification::Notify() {
+  GTEST_CHECK_(::SetEvent(event_.Get()) != FALSE);
+}
+
+void Notification::WaitForNotification() {
+  GTEST_CHECK_(
+      ::WaitForSingleObject(event_.Get(), INFINITE) == WAIT_OBJECT_0);
+}
+
+Mutex::Mutex()
+    : owner_thread_id_(0),
+      type_(kDynamic),
+      critical_section_init_phase_(0),
+      critical_section_(new CRITICAL_SECTION) {
+  ::InitializeCriticalSection(critical_section_);
+}
+
+Mutex::~Mutex() {
+  // Static mutexes are leaked intentionally. It is not thread-safe to try
+  // to clean them up.
+  if (type_ == kDynamic) {
+    ::DeleteCriticalSection(critical_section_);
+    delete critical_section_;
+    critical_section_ = nullptr;
+  }
+}
+
+void Mutex::Lock() {
+  ThreadSafeLazyInit();
+  ::EnterCriticalSection(critical_section_);
+  owner_thread_id_ = ::GetCurrentThreadId();
+}
+
+void Mutex::Unlock() {
+  ThreadSafeLazyInit();
+  // We don't protect writing to owner_thread_id_ here, as it's the
+  // caller's responsibility to ensure that the current thread holds the
+  // mutex when this is called.
+  owner_thread_id_ = 0;
+  ::LeaveCriticalSection(critical_section_);
+}
+
+// Does nothing if the current thread holds the mutex. Otherwise, crashes
+// with high probability.
+void Mutex::AssertHeld() {
+  ThreadSafeLazyInit();
+  GTEST_CHECK_(owner_thread_id_ == ::GetCurrentThreadId())
+      << "The current thread is not holding the mutex @" << this;
+}
+
+namespace {
+
+#ifdef _MSC_VER
+// Use the RAII idiom to flag mem allocs that are intentionally never
+// deallocated. The motivation is to silence the false positive mem leaks
+// that are reported by the debug version of MS's CRT which can only detect
+// if an alloc is missing a matching deallocation.
+// Example:
+//    MemoryIsNotDeallocated memory_is_not_deallocated;
+//    critical_section_ = new CRITICAL_SECTION;
+//
+class MemoryIsNotDeallocated
+{
+ public:
+  MemoryIsNotDeallocated() : old_crtdbg_flag_(0) {
+    old_crtdbg_flag_ = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
+    // Set heap allocation block type to _IGNORE_BLOCK so that MS debug CRT
+    // doesn't report mem leak if there's no matching deallocation.
+    _CrtSetDbgFlag(old_crtdbg_flag_ & ~_CRTDBG_ALLOC_MEM_DF);
+  }
+
+  ~MemoryIsNotDeallocated() {
+    // Restore the original _CRTDBG_ALLOC_MEM_DF flag
+    _CrtSetDbgFlag(old_crtdbg_flag_);
+  }
+
+ private:
+  int old_crtdbg_flag_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(MemoryIsNotDeallocated);
+};
+#endif  // _MSC_VER
+
+}  // namespace
+
+// Initializes owner_thread_id_ and critical_section_ in static mutexes.
+void Mutex::ThreadSafeLazyInit() {
+  // Dynamic mutexes are initialized in the constructor.
+  if (type_ == kStatic) {
+    switch (
+        ::InterlockedCompareExchange(&critical_section_init_phase_, 1L, 0L)) {
+      case 0:
+        // If critical_section_init_phase_ was 0 before the exchange, we
+        // are the first to test it and need to perform the initialization.
+        owner_thread_id_ = 0;
+        {
+          // Use RAII to flag that following mem alloc is never deallocated.
+#ifdef _MSC_VER
+          MemoryIsNotDeallocated memory_is_not_deallocated;
+#endif  // _MSC_VER
+          critical_section_ = new CRITICAL_SECTION;
+        }
+        ::InitializeCriticalSection(critical_section_);
+        // Updates the critical_section_init_phase_ to 2 to signal
+        // initialization complete.
+        GTEST_CHECK_(::InterlockedCompareExchange(
+                          &critical_section_init_phase_, 2L, 1L) ==
+                      1L);
+        break;
+      case 1:
+        // Somebody else is already initializing the mutex; spin until they
+        // are done.
+        while (::InterlockedCompareExchange(&critical_section_init_phase_,
+                                            2L,
+                                            2L) != 2L) {
+          // Possibly yields the rest of the thread's time slice to other
+          // threads.
+          ::Sleep(0);
+        }
+        break;
+
+      case 2:
+        break;  // The mutex is already initialized and ready for use.
+
+      default:
+        GTEST_CHECK_(false)
+            << "Unexpected value of critical_section_init_phase_ "
+            << "while initializing a static mutex.";
+    }
+  }
+}
+
+namespace {
+
+class ThreadWithParamSupport : public ThreadWithParamBase {
+ public:
+  static HANDLE CreateThread(Runnable* runnable,
+                             Notification* thread_can_start) {
+    ThreadMainParam* param = new ThreadMainParam(runnable, thread_can_start);
+    DWORD thread_id;
+    HANDLE thread_handle = ::CreateThread(
+        nullptr,  // Default security.
+        0,        // Default stack size.
+        &ThreadWithParamSupport::ThreadMain,
+        param,        // Parameter to ThreadMainStatic
+        0x0,          // Default creation flags.
+        &thread_id);  // Need a valid pointer for the call to work under Win98.
+    GTEST_CHECK_(thread_handle != nullptr)
+        << "CreateThread failed with error " << ::GetLastError() << ".";
+    if (thread_handle == nullptr) {
+      delete param;
+    }
+    return thread_handle;
+  }
+
+ private:
+  struct ThreadMainParam {
+    ThreadMainParam(Runnable* runnable, Notification* thread_can_start)
+        : runnable_(runnable),
+          thread_can_start_(thread_can_start) {
+    }
+    std::unique_ptr<Runnable> runnable_;
+    // Does not own.
+    Notification* thread_can_start_;
+  };
+
+  static DWORD WINAPI ThreadMain(void* ptr) {
+    // Transfers ownership.
+    std::unique_ptr<ThreadMainParam> param(static_cast<ThreadMainParam*>(ptr));
+    if (param->thread_can_start_ != nullptr)
+      param->thread_can_start_->WaitForNotification();
+    param->runnable_->Run();
+    return 0;
+  }
+
+  // Prohibit instantiation.
+  ThreadWithParamSupport();
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParamSupport);
+};
+
+}  // namespace
+
+ThreadWithParamBase::ThreadWithParamBase(Runnable *runnable,
+                                         Notification* thread_can_start)
+      : thread_(ThreadWithParamSupport::CreateThread(runnable,
+                                                     thread_can_start)) {
+}
+
+ThreadWithParamBase::~ThreadWithParamBase() {
+  Join();
+}
+
+void ThreadWithParamBase::Join() {
+  GTEST_CHECK_(::WaitForSingleObject(thread_.Get(), INFINITE) == WAIT_OBJECT_0)
+      << "Failed to join the thread with error " << ::GetLastError() << ".";
+}
+
+// Maps a thread to a set of ThreadIdToThreadLocals that have values
+// instantiated on that thread and notifies them when the thread exits.  A
+// ThreadLocal instance is expected to persist until all threads it has
+// values on have terminated.
+class ThreadLocalRegistryImpl {
+ public:
+  // Registers thread_local_instance as having value on the current thread.
+  // Returns a value that can be used to identify the thread from other threads.
+  static ThreadLocalValueHolderBase* GetValueOnCurrentThread(
+      const ThreadLocalBase* thread_local_instance) {
+#ifdef _MSC_VER
+    MemoryIsNotDeallocated memory_is_not_deallocated;
+#endif  // _MSC_VER
+    DWORD current_thread = ::GetCurrentThreadId();
+    MutexLock lock(&mutex_);
+    ThreadIdToThreadLocals* const thread_to_thread_locals =
+        GetThreadLocalsMapLocked();
+    ThreadIdToThreadLocals::iterator thread_local_pos =
+        thread_to_thread_locals->find(current_thread);
+    if (thread_local_pos == thread_to_thread_locals->end()) {
+      thread_local_pos = thread_to_thread_locals->insert(
+          std::make_pair(current_thread, ThreadLocalValues())).first;
+      StartWatcherThreadFor(current_thread);
+    }
+    ThreadLocalValues& thread_local_values = thread_local_pos->second;
+    ThreadLocalValues::iterator value_pos =
+        thread_local_values.find(thread_local_instance);
+    if (value_pos == thread_local_values.end()) {
+      value_pos =
+          thread_local_values
+              .insert(std::make_pair(
+                  thread_local_instance,
+                  std::shared_ptr<ThreadLocalValueHolderBase>(
+                      thread_local_instance->NewValueForCurrentThread())))
+              .first;
+    }
+    return value_pos->second.get();
+  }
+
+  static void OnThreadLocalDestroyed(
+      const ThreadLocalBase* thread_local_instance) {
+    std::vector<std::shared_ptr<ThreadLocalValueHolderBase> > value_holders;
+    // Clean up the ThreadLocalValues data structure while holding the lock, but
+    // defer the destruction of the ThreadLocalValueHolderBases.
+    {
+      MutexLock lock(&mutex_);
+      ThreadIdToThreadLocals* const thread_to_thread_locals =
+          GetThreadLocalsMapLocked();
+      for (ThreadIdToThreadLocals::iterator it =
+          thread_to_thread_locals->begin();
+          it != thread_to_thread_locals->end();
+          ++it) {
+        ThreadLocalValues& thread_local_values = it->second;
+        ThreadLocalValues::iterator value_pos =
+            thread_local_values.find(thread_local_instance);
+        if (value_pos != thread_local_values.end()) {
+          value_holders.push_back(value_pos->second);
+          thread_local_values.erase(value_pos);
+          // This 'if' can only be successful at most once, so theoretically we
+          // could break out of the loop here, but we don't bother doing so.
+        }
+      }
+    }
+    // Outside the lock, let the destructor for 'value_holders' deallocate the
+    // ThreadLocalValueHolderBases.
+  }
+
+  static void OnThreadExit(DWORD thread_id) {
+    GTEST_CHECK_(thread_id != 0) << ::GetLastError();
+    std::vector<std::shared_ptr<ThreadLocalValueHolderBase> > value_holders;
+    // Clean up the ThreadIdToThreadLocals data structure while holding the
+    // lock, but defer the destruction of the ThreadLocalValueHolderBases.
+    {
+      MutexLock lock(&mutex_);
+      ThreadIdToThreadLocals* const thread_to_thread_locals =
+          GetThreadLocalsMapLocked();
+      ThreadIdToThreadLocals::iterator thread_local_pos =
+          thread_to_thread_locals->find(thread_id);
+      if (thread_local_pos != thread_to_thread_locals->end()) {
+        ThreadLocalValues& thread_local_values = thread_local_pos->second;
+        for (ThreadLocalValues::iterator value_pos =
+            thread_local_values.begin();
+            value_pos != thread_local_values.end();
+            ++value_pos) {
+          value_holders.push_back(value_pos->second);
+        }
+        thread_to_thread_locals->erase(thread_local_pos);
+      }
+    }
+    // Outside the lock, let the destructor for 'value_holders' deallocate the
+    // ThreadLocalValueHolderBases.
+  }
+
+ private:
+  // In a particular thread, maps a ThreadLocal object to its value.
+  typedef std::map<const ThreadLocalBase*,
+                   std::shared_ptr<ThreadLocalValueHolderBase> >
+      ThreadLocalValues;
+  // Stores all ThreadIdToThreadLocals having values in a thread, indexed by
+  // thread's ID.
+  typedef std::map<DWORD, ThreadLocalValues> ThreadIdToThreadLocals;
+
+  // Holds the thread id and thread handle that we pass from
+  // StartWatcherThreadFor to WatcherThreadFunc.
+  typedef std::pair<DWORD, HANDLE> ThreadIdAndHandle;
+
+  static void StartWatcherThreadFor(DWORD thread_id) {
+    // The returned handle will be kept in thread_map and closed by
+    // watcher_thread in WatcherThreadFunc.
+    HANDLE thread = ::OpenThread(SYNCHRONIZE | THREAD_QUERY_INFORMATION,
+                                 FALSE,
+                                 thread_id);
+    GTEST_CHECK_(thread != nullptr);
+    // We need to pass a valid thread ID pointer into CreateThread for it
+    // to work correctly under Win98.
+    DWORD watcher_thread_id;
+    HANDLE watcher_thread = ::CreateThread(
+        nullptr,  // Default security.
+        0,        // Default stack size
+        &ThreadLocalRegistryImpl::WatcherThreadFunc,
+        reinterpret_cast<LPVOID>(new ThreadIdAndHandle(thread_id, thread)),
+        CREATE_SUSPENDED, &watcher_thread_id);
+    GTEST_CHECK_(watcher_thread != nullptr);
+    // Give the watcher thread the same priority as ours to avoid being
+    // blocked by it.
+    ::SetThreadPriority(watcher_thread,
+                        ::GetThreadPriority(::GetCurrentThread()));
+    ::ResumeThread(watcher_thread);
+    ::CloseHandle(watcher_thread);
+  }
+
+  // Monitors exit from a given thread and notifies those
+  // ThreadIdToThreadLocals about thread termination.
+  static DWORD WINAPI WatcherThreadFunc(LPVOID param) {
+    const ThreadIdAndHandle* tah =
+        reinterpret_cast<const ThreadIdAndHandle*>(param);
+    GTEST_CHECK_(
+        ::WaitForSingleObject(tah->second, INFINITE) == WAIT_OBJECT_0);
+    OnThreadExit(tah->first);
+    ::CloseHandle(tah->second);
+    delete tah;
+    return 0;
+  }
+
+  // Returns map of thread local instances.
+  static ThreadIdToThreadLocals* GetThreadLocalsMapLocked() {
+    mutex_.AssertHeld();
+#ifdef _MSC_VER
+    MemoryIsNotDeallocated memory_is_not_deallocated;
+#endif  // _MSC_VER
+    static ThreadIdToThreadLocals* map = new ThreadIdToThreadLocals();
+    return map;
+  }
+
+  // Protects access to GetThreadLocalsMapLocked() and its return value.
+  static Mutex mutex_;
+  // Protects access to GetThreadMapLocked() and its return value.
+  static Mutex thread_map_mutex_;
+};
+
+Mutex ThreadLocalRegistryImpl::mutex_(Mutex::kStaticMutex);
+Mutex ThreadLocalRegistryImpl::thread_map_mutex_(Mutex::kStaticMutex);
+
+ThreadLocalValueHolderBase* ThreadLocalRegistry::GetValueOnCurrentThread(
+      const ThreadLocalBase* thread_local_instance) {
+  return ThreadLocalRegistryImpl::GetValueOnCurrentThread(
+      thread_local_instance);
+}
+
+void ThreadLocalRegistry::OnThreadLocalDestroyed(
+      const ThreadLocalBase* thread_local_instance) {
+  ThreadLocalRegistryImpl::OnThreadLocalDestroyed(thread_local_instance);
+}
+
+#endif  // GTEST_IS_THREADSAFE && GTEST_OS_WINDOWS
+
+#if GTEST_USES_POSIX_RE
+
+// Implements RE.  Currently only needed for death tests.
+
+RE::~RE() {
+  if (is_valid_) {
+    // regfree'ing an invalid regex might crash because the content
+    // of the regex is undefined. Since the regex's are essentially
+    // the same, one cannot be valid (or invalid) without the other
+    // being so too.
+    regfree(&partial_regex_);
+    regfree(&full_regex_);
+  }
+  free(const_cast<char*>(pattern_));
+}
+
+// Returns true if and only if regular expression re matches the entire str.
+bool RE::FullMatch(const char* str, const RE& re) {
+  if (!re.is_valid_) return false;
+
+  regmatch_t match;
+  return regexec(&re.full_regex_, str, 1, &match, 0) == 0;
+}
+
+// Returns true if and only if regular expression re matches a substring of
+// str (including str itself).
+bool RE::PartialMatch(const char* str, const RE& re) {
+  if (!re.is_valid_) return false;
+
+  regmatch_t match;
+  return regexec(&re.partial_regex_, str, 1, &match, 0) == 0;
+}
+
+// Initializes an RE from its string representation.
+void RE::Init(const char* regex) {
+  pattern_ = posix::StrDup(regex);
+
+  // Reserves enough bytes to hold the regular expression used for a
+  // full match.
+  const size_t full_regex_len = strlen(regex) + 10;
+  char* const full_pattern = new char[full_regex_len];
+
+  snprintf(full_pattern, full_regex_len, "^(%s)$", regex);
+  is_valid_ = regcomp(&full_regex_, full_pattern, REG_EXTENDED) == 0;
+  // We want to call regcomp(&partial_regex_, ...) even if the
+  // previous expression returns false.  Otherwise partial_regex_ may
+  // not be properly initialized can may cause trouble when it's
+  // freed.
+  //
+  // Some implementation of POSIX regex (e.g. on at least some
+  // versions of Cygwin) doesn't accept the empty string as a valid
+  // regex.  We change it to an equivalent form "()" to be safe.
+  if (is_valid_) {
+    const char* const partial_regex = (*regex == '\0') ? "()" : regex;
+    is_valid_ = regcomp(&partial_regex_, partial_regex, REG_EXTENDED) == 0;
+  }
+  EXPECT_TRUE(is_valid_)
+      << "Regular expression \"" << regex
+      << "\" is not a valid POSIX Extended regular expression.";
+
+  delete[] full_pattern;
+}
+
+#elif GTEST_USES_SIMPLE_RE
+
+// Returns true if and only if ch appears anywhere in str (excluding the
+// terminating '\0' character).
+bool IsInSet(char ch, const char* str) {
+  return ch != '\0' && strchr(str, ch) != nullptr;
+}
+
+// Returns true if and only if ch belongs to the given classification.
+// Unlike similar functions in <ctype.h>, these aren't affected by the
+// current locale.
+bool IsAsciiDigit(char ch) { return '0' <= ch && ch <= '9'; }
+bool IsAsciiPunct(char ch) {
+  return IsInSet(ch, "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~");
+}
+bool IsRepeat(char ch) { return IsInSet(ch, "?*+"); }
+bool IsAsciiWhiteSpace(char ch) { return IsInSet(ch, " \f\n\r\t\v"); }
+bool IsAsciiWordChar(char ch) {
+  return ('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z') ||
+      ('0' <= ch && ch <= '9') || ch == '_';
+}
+
+// Returns true if and only if "\\c" is a supported escape sequence.
+bool IsValidEscape(char c) {
+  return (IsAsciiPunct(c) || IsInSet(c, "dDfnrsStvwW"));
+}
+
+// Returns true if and only if the given atom (specified by escaped and
+// pattern) matches ch.  The result is undefined if the atom is invalid.
+bool AtomMatchesChar(bool escaped, char pattern_char, char ch) {
+  if (escaped) {  // "\\p" where p is pattern_char.
+    switch (pattern_char) {
+      case 'd': return IsAsciiDigit(ch);
+      case 'D': return !IsAsciiDigit(ch);
+      case 'f': return ch == '\f';
+      case 'n': return ch == '\n';
+      case 'r': return ch == '\r';
+      case 's': return IsAsciiWhiteSpace(ch);
+      case 'S': return !IsAsciiWhiteSpace(ch);
+      case 't': return ch == '\t';
+      case 'v': return ch == '\v';
+      case 'w': return IsAsciiWordChar(ch);
+      case 'W': return !IsAsciiWordChar(ch);
+    }
+    return IsAsciiPunct(pattern_char) && pattern_char == ch;
+  }
+
+  return (pattern_char == '.' && ch != '\n') || pattern_char == ch;
+}
+
+// Helper function used by ValidateRegex() to format error messages.
+static std::string FormatRegexSyntaxError(const char* regex, int index) {
+  return (Message() << "Syntax error at index " << index
+          << " in simple regular expression \"" << regex << "\": ").GetString();
+}
+
+// Generates non-fatal failures and returns false if regex is invalid;
+// otherwise returns true.
+bool ValidateRegex(const char* regex) {
+  if (regex == nullptr) {
+    ADD_FAILURE() << "NULL is not a valid simple regular expression.";
+    return false;
+  }
+
+  bool is_valid = true;
+
+  // True if and only if ?, *, or + can follow the previous atom.
+  bool prev_repeatable = false;
+  for (int i = 0; regex[i]; i++) {
+    if (regex[i] == '\\') {  // An escape sequence
+      i++;
+      if (regex[i] == '\0') {
+        ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
+                      << "'\\' cannot appear at the end.";
+        return false;
+      }
+
+      if (!IsValidEscape(regex[i])) {
+        ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
+                      << "invalid escape sequence \"\\" << regex[i] << "\".";
+        is_valid = false;
+      }
+      prev_repeatable = true;
+    } else {  // Not an escape sequence.
+      const char ch = regex[i];
+
+      if (ch == '^' && i > 0) {
+        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
+                      << "'^' can only appear at the beginning.";
+        is_valid = false;
+      } else if (ch == '$' && regex[i + 1] != '\0') {
+        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
+                      << "'$' can only appear at the end.";
+        is_valid = false;
+      } else if (IsInSet(ch, "()[]{}|")) {
+        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
+                      << "'" << ch << "' is unsupported.";
+        is_valid = false;
+      } else if (IsRepeat(ch) && !prev_repeatable) {
+        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
+                      << "'" << ch << "' can only follow a repeatable token.";
+        is_valid = false;
+      }
+
+      prev_repeatable = !IsInSet(ch, "^$?*+");
+    }
+  }
+
+  return is_valid;
+}
+
+// Matches a repeated regex atom followed by a valid simple regular
+// expression.  The regex atom is defined as c if escaped is false,
+// or \c otherwise.  repeat is the repetition meta character (?, *,
+// or +).  The behavior is undefined if str contains too many
+// characters to be indexable by size_t, in which case the test will
+// probably time out anyway.  We are fine with this limitation as
+// std::string has it too.
+bool MatchRepetitionAndRegexAtHead(
+    bool escaped, char c, char repeat, const char* regex,
+    const char* str) {
+  const size_t min_count = (repeat == '+') ? 1 : 0;
+  const size_t max_count = (repeat == '?') ? 1 :
+      static_cast<size_t>(-1) - 1;
+  // We cannot call numeric_limits::max() as it conflicts with the
+  // max() macro on Windows.
+
+  for (size_t i = 0; i <= max_count; ++i) {
+    // We know that the atom matches each of the first i characters in str.
+    if (i >= min_count && MatchRegexAtHead(regex, str + i)) {
+      // We have enough matches at the head, and the tail matches too.
+      // Since we only care about *whether* the pattern matches str
+      // (as opposed to *how* it matches), there is no need to find a
+      // greedy match.
+      return true;
+    }
+    if (str[i] == '\0' || !AtomMatchesChar(escaped, c, str[i]))
+      return false;
+  }
+  return false;
+}
+
+// Returns true if and only if regex matches a prefix of str. regex must
+// be a valid simple regular expression and not start with "^", or the
+// result is undefined.
+bool MatchRegexAtHead(const char* regex, const char* str) {
+  if (*regex == '\0')  // An empty regex matches a prefix of anything.
+    return true;
+
+  // "$" only matches the end of a string.  Note that regex being
+  // valid guarantees that there's nothing after "$" in it.
+  if (*regex == '$')
+    return *str == '\0';
+
+  // Is the first thing in regex an escape sequence?
+  const bool escaped = *regex == '\\';
+  if (escaped)
+    ++regex;
+  if (IsRepeat(regex[1])) {
+    // MatchRepetitionAndRegexAtHead() calls MatchRegexAtHead(), so
+    // here's an indirect recursion.  It terminates as the regex gets
+    // shorter in each recursion.
+    return MatchRepetitionAndRegexAtHead(
+        escaped, regex[0], regex[1], regex + 2, str);
+  } else {
+    // regex isn't empty, isn't "$", and doesn't start with a
+    // repetition.  We match the first atom of regex with the first
+    // character of str and recurse.
+    return (*str != '\0') && AtomMatchesChar(escaped, *regex, *str) &&
+        MatchRegexAtHead(regex + 1, str + 1);
+  }
+}
+
+// Returns true if and only if regex matches any substring of str.  regex must
+// be a valid simple regular expression, or the result is undefined.
+//
+// The algorithm is recursive, but the recursion depth doesn't exceed
+// the regex length, so we won't need to worry about running out of
+// stack space normally.  In rare cases the time complexity can be
+// exponential with respect to the regex length + the string length,
+// but usually it's must faster (often close to linear).
+bool MatchRegexAnywhere(const char* regex, const char* str) {
+  if (regex == nullptr || str == nullptr) return false;
+
+  if (*regex == '^')
+    return MatchRegexAtHead(regex + 1, str);
+
+  // A successful match can be anywhere in str.
+  do {
+    if (MatchRegexAtHead(regex, str))
+      return true;
+  } while (*str++ != '\0');
+  return false;
+}
+
+// Implements the RE class.
+
+RE::~RE() {
+  free(const_cast<char*>(pattern_));
+  free(const_cast<char*>(full_pattern_));
+}
+
+// Returns true if and only if regular expression re matches the entire str.
+bool RE::FullMatch(const char* str, const RE& re) {
+  return re.is_valid_ && MatchRegexAnywhere(re.full_pattern_, str);
+}
+
+// Returns true if and only if regular expression re matches a substring of
+// str (including str itself).
+bool RE::PartialMatch(const char* str, const RE& re) {
+  return re.is_valid_ && MatchRegexAnywhere(re.pattern_, str);
+}
+
+// Initializes an RE from its string representation.
+void RE::Init(const char* regex) {
+  pattern_ = full_pattern_ = nullptr;
+  if (regex != nullptr) {
+    pattern_ = posix::StrDup(regex);
+  }
+
+  is_valid_ = ValidateRegex(regex);
+  if (!is_valid_) {
+    // No need to calculate the full pattern when the regex is invalid.
+    return;
+  }
+
+  const size_t len = strlen(regex);
+  // Reserves enough bytes to hold the regular expression used for a
+  // full match: we need space to prepend a '^', append a '$', and
+  // terminate the string with '\0'.
+  char* buffer = static_cast<char*>(malloc(len + 3));
+  full_pattern_ = buffer;
+
+  if (*regex != '^')
+    *buffer++ = '^';  // Makes sure full_pattern_ starts with '^'.
+
+  // We don't use snprintf or strncpy, as they trigger a warning when
+  // compiled with VC++ 8.0.
+  memcpy(buffer, regex, len);
+  buffer += len;
+
+  if (len == 0 || regex[len - 1] != '$')
+    *buffer++ = '$';  // Makes sure full_pattern_ ends with '$'.
+
+  *buffer = '\0';
+}
+
+#endif  // GTEST_USES_POSIX_RE
+
+const char kUnknownFile[] = "unknown file";
+
+// Formats a source file path and a line number as they would appear
+// in an error message from the compiler used to compile this code.
+GTEST_API_ ::std::string FormatFileLocation(const char* file, int line) {
+  const std::string file_name(file == nullptr ? kUnknownFile : file);
+
+  if (line < 0) {
+    return file_name + ":";
+  }
+#ifdef _MSC_VER
+  return file_name + "(" + StreamableToString(line) + "):";
+#else
+  return file_name + ":" + StreamableToString(line) + ":";
+#endif  // _MSC_VER
+}
+
+// Formats a file location for compiler-independent XML output.
+// Although this function is not platform dependent, we put it next to
+// FormatFileLocation in order to contrast the two functions.
+// Note that FormatCompilerIndependentFileLocation() does NOT append colon
+// to the file location it produces, unlike FormatFileLocation().
+GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(
+    const char* file, int line) {
+  const std::string file_name(file == nullptr ? kUnknownFile : file);
+
+  if (line < 0)
+    return file_name;
+  else
+    return file_name + ":" + StreamableToString(line);
+}
+
+GTestLog::GTestLog(GTestLogSeverity severity, const char* file, int line)
+    : severity_(severity) {
+  const char* const marker =
+      severity == GTEST_INFO ?    "[  INFO ]" :
+      severity == GTEST_WARNING ? "[WARNING]" :
+      severity == GTEST_ERROR ?   "[ ERROR ]" : "[ FATAL ]";
+  GetStream() << ::std::endl << marker << " "
+              << FormatFileLocation(file, line).c_str() << ": ";
+}
+
+// Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
+GTestLog::~GTestLog() {
+  GetStream() << ::std::endl;
+  if (severity_ == GTEST_FATAL) {
+    fflush(stderr);
+    posix::Abort();
+  }
+}
+
+// Disable Microsoft deprecation warnings for POSIX functions called from
+// this class (creat, dup, dup2, and close)
+GTEST_DISABLE_MSC_DEPRECATED_PUSH_()
+
+#if GTEST_HAS_STREAM_REDIRECTION
+
+// Object that captures an output stream (stdout/stderr).
+class CapturedStream {
+ public:
+  // The ctor redirects the stream to a temporary file.
+  explicit CapturedStream(int fd) : fd_(fd), uncaptured_fd_(dup(fd)) {
+# if GTEST_OS_WINDOWS
+    char temp_dir_path[MAX_PATH + 1] = { '\0' };  // NOLINT
+    char temp_file_path[MAX_PATH + 1] = { '\0' };  // NOLINT
+
+    ::GetTempPathA(sizeof(temp_dir_path), temp_dir_path);
+    const UINT success = ::GetTempFileNameA(temp_dir_path,
+                                            "gtest_redir",
+                                            0,  // Generate unique file name.
+                                            temp_file_path);
+    GTEST_CHECK_(success != 0)
+        << "Unable to create a temporary file in " << temp_dir_path;
+    const int captured_fd = creat(temp_file_path, _S_IREAD | _S_IWRITE);
+    GTEST_CHECK_(captured_fd != -1) << "Unable to open temporary file "
+                                    << temp_file_path;
+    filename_ = temp_file_path;
+# else
+    // There's no guarantee that a test has write access to the current
+    // directory, so we create the temporary file in the /tmp directory
+    // instead. We use /tmp on most systems, and /sdcard on Android.
+    // That's because Android doesn't have /tmp.
+#  if GTEST_OS_LINUX_ANDROID
+    // Note: Android applications are expected to call the framework's
+    // Context.getExternalStorageDirectory() method through JNI to get
+    // the location of the world-writable SD Card directory. However,
+    // this requires a Context handle, which cannot be retrieved
+    // globally from native code. Doing so also precludes running the
+    // code as part of a regular standalone executable, which doesn't
+    // run in a Dalvik process (e.g. when running it through 'adb shell').
+    //
+    // The location /data/local/tmp is directly accessible from native code.
+    // '/sdcard' and other variants cannot be relied on, as they are not
+    // guaranteed to be mounted, or may have a delay in mounting.
+    char name_template[] = "/data/local/tmp/gtest_captured_stream.XXXXXX";
+#  else
+    char name_template[] = "/tmp/captured_stream.XXXXXX";
+#  endif  // GTEST_OS_LINUX_ANDROID
+    const int captured_fd = mkstemp(name_template);
+    if (captured_fd == -1) {
+      GTEST_LOG_(WARNING)
+          << "Failed to create tmp file " << name_template
+          << " for test; does the test have access to the /tmp directory?";
+    }
+    filename_ = name_template;
+# endif  // GTEST_OS_WINDOWS
+    fflush(nullptr);
+    dup2(captured_fd, fd_);
+    close(captured_fd);
+  }
+
+  ~CapturedStream() {
+    remove(filename_.c_str());
+  }
+
+  std::string GetCapturedString() {
+    if (uncaptured_fd_ != -1) {
+      // Restores the original stream.
+      fflush(nullptr);
+      dup2(uncaptured_fd_, fd_);
+      close(uncaptured_fd_);
+      uncaptured_fd_ = -1;
+    }
+
+    FILE* const file = posix::FOpen(filename_.c_str(), "r");
+    if (file == nullptr) {
+      GTEST_LOG_(FATAL) << "Failed to open tmp file " << filename_
+                        << " for capturing stream.";
+    }
+    const std::string content = ReadEntireFile(file);
+    posix::FClose(file);
+    return content;
+  }
+
+ private:
+  const int fd_;  // A stream to capture.
+  int uncaptured_fd_;
+  // Name of the temporary file holding the stderr output.
+  ::std::string filename_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(CapturedStream);
+};
+
+GTEST_DISABLE_MSC_DEPRECATED_POP_()
+
+static CapturedStream* g_captured_stderr = nullptr;
+static CapturedStream* g_captured_stdout = nullptr;
+
+// Starts capturing an output stream (stdout/stderr).
+static void CaptureStream(int fd, const char* stream_name,
+                          CapturedStream** stream) {
+  if (*stream != nullptr) {
+    GTEST_LOG_(FATAL) << "Only one " << stream_name
+                      << " capturer can exist at a time.";
+  }
+  *stream = new CapturedStream(fd);
+}
+
+// Stops capturing the output stream and returns the captured string.
+static std::string GetCapturedStream(CapturedStream** captured_stream) {
+  const std::string content = (*captured_stream)->GetCapturedString();
+
+  delete *captured_stream;
+  *captured_stream = nullptr;
+
+  return content;
+}
+
+// Starts capturing stdout.
+void CaptureStdout() {
+  CaptureStream(kStdOutFileno, "stdout", &g_captured_stdout);
+}
+
+// Starts capturing stderr.
+void CaptureStderr() {
+  CaptureStream(kStdErrFileno, "stderr", &g_captured_stderr);
+}
+
+// Stops capturing stdout and returns the captured string.
+std::string GetCapturedStdout() {
+  return GetCapturedStream(&g_captured_stdout);
+}
+
+// Stops capturing stderr and returns the captured string.
+std::string GetCapturedStderr() {
+  return GetCapturedStream(&g_captured_stderr);
+}
+
+#endif  // GTEST_HAS_STREAM_REDIRECTION
+
+
+
+
+
+size_t GetFileSize(FILE* file) {
+  fseek(file, 0, SEEK_END);
+  return static_cast<size_t>(ftell(file));
+}
+
+std::string ReadEntireFile(FILE* file) {
+  const size_t file_size = GetFileSize(file);
+  char* const buffer = new char[file_size];
+
+  size_t bytes_last_read = 0;  // # of bytes read in the last fread()
+  size_t bytes_read = 0;       // # of bytes read so far
+
+  fseek(file, 0, SEEK_SET);
+
+  // Keeps reading the file until we cannot read further or the
+  // pre-determined file size is reached.
+  do {
+    bytes_last_read = fread(buffer+bytes_read, 1, file_size-bytes_read, file);
+    bytes_read += bytes_last_read;
+  } while (bytes_last_read > 0 && bytes_read < file_size);
+
+  const std::string content(buffer, bytes_read);
+  delete[] buffer;
+
+  return content;
+}
+
+#if GTEST_HAS_DEATH_TEST
+static const std::vector<std::string>* g_injected_test_argvs =
+    nullptr;  // Owned.
+
+std::vector<std::string> GetInjectableArgvs() {
+  if (g_injected_test_argvs != nullptr) {
+    return *g_injected_test_argvs;
+  }
+  return GetArgvs();
+}
+
+void SetInjectableArgvs(const std::vector<std::string>* new_argvs) {
+  if (g_injected_test_argvs != new_argvs) delete g_injected_test_argvs;
+  g_injected_test_argvs = new_argvs;
+}
+
+void SetInjectableArgvs(const std::vector<std::string>& new_argvs) {
+  SetInjectableArgvs(
+      new std::vector<std::string>(new_argvs.begin(), new_argvs.end()));
+}
+
+void ClearInjectableArgvs() {
+  delete g_injected_test_argvs;
+  g_injected_test_argvs = nullptr;
+}
+#endif  // GTEST_HAS_DEATH_TEST
+
+#if GTEST_OS_WINDOWS_MOBILE
+namespace posix {
+void Abort() {
+  DebugBreak();
+  TerminateProcess(GetCurrentProcess(), 1);
+}
+}  // namespace posix
+#endif  // GTEST_OS_WINDOWS_MOBILE
+
+// Returns the name of the environment variable corresponding to the
+// given flag.  For example, FlagToEnvVar("foo") will return
+// "GTEST_FOO" in the open-source version.
+static std::string FlagToEnvVar(const char* flag) {
+  const std::string full_flag =
+      (Message() << GTEST_FLAG_PREFIX_ << flag).GetString();
+
+  Message env_var;
+  for (size_t i = 0; i != full_flag.length(); i++) {
+    env_var << ToUpper(full_flag.c_str()[i]);
+  }
+
+  return env_var.GetString();
+}
+
+// Parses 'str' for a 32-bit signed integer.  If successful, writes
+// the result to *value and returns true; otherwise leaves *value
+// unchanged and returns false.
+bool ParseInt32(const Message& src_text, const char* str, int32_t* value) {
+  // Parses the environment variable as a decimal integer.
+  char* end = nullptr;
+  const long long_value = strtol(str, &end, 10);  // NOLINT
+
+  // Has strtol() consumed all characters in the string?
+  if (*end != '\0') {
+    // No - an invalid character was encountered.
+    Message msg;
+    msg << "WARNING: " << src_text
+        << " is expected to be a 32-bit integer, but actually"
+        << " has value \"" << str << "\".\n";
+    printf("%s", msg.GetString().c_str());
+    fflush(stdout);
+    return false;
+  }
+
+  // Is the parsed value in the range of an int32_t?
+  const auto result = static_cast<int32_t>(long_value);
+  if (long_value == LONG_MAX || long_value == LONG_MIN ||
+      // The parsed value overflows as a long.  (strtol() returns
+      // LONG_MAX or LONG_MIN when the input overflows.)
+      result != long_value
+      // The parsed value overflows as an int32_t.
+      ) {
+    Message msg;
+    msg << "WARNING: " << src_text
+        << " is expected to be a 32-bit integer, but actually"
+        << " has value " << str << ", which overflows.\n";
+    printf("%s", msg.GetString().c_str());
+    fflush(stdout);
+    return false;
+  }
+
+  *value = result;
+  return true;
+}
+
+// Reads and returns the Boolean environment variable corresponding to
+// the given flag; if it's not set, returns default_value.
+//
+// The value is considered true if and only if it's not "0".
+bool BoolFromGTestEnv(const char* flag, bool default_value) {
+#if defined(GTEST_GET_BOOL_FROM_ENV_)
+  return GTEST_GET_BOOL_FROM_ENV_(flag, default_value);
+#else
+  const std::string env_var = FlagToEnvVar(flag);
+  const char* const string_value = posix::GetEnv(env_var.c_str());
+  return string_value == nullptr ? default_value
+                                 : strcmp(string_value, "0") != 0;
+#endif  // defined(GTEST_GET_BOOL_FROM_ENV_)
+}
+
+// Reads and returns a 32-bit integer stored in the environment
+// variable corresponding to the given flag; if it isn't set or
+// doesn't represent a valid 32-bit integer, returns default_value.
+int32_t Int32FromGTestEnv(const char* flag, int32_t default_value) {
+#if defined(GTEST_GET_INT32_FROM_ENV_)
+  return GTEST_GET_INT32_FROM_ENV_(flag, default_value);
+#else
+  const std::string env_var = FlagToEnvVar(flag);
+  const char* const string_value = posix::GetEnv(env_var.c_str());
+  if (string_value == nullptr) {
+    // The environment variable is not set.
+    return default_value;
+  }
+
+  int32_t result = default_value;
+  if (!ParseInt32(Message() << "Environment variable " << env_var,
+                  string_value, &result)) {
+    printf("The default value %s is used.\n",
+           (Message() << default_value).GetString().c_str());
+    fflush(stdout);
+    return default_value;
+  }
+
+  return result;
+#endif  // defined(GTEST_GET_INT32_FROM_ENV_)
+}
+
+// As a special case for the 'output' flag, if GTEST_OUTPUT is not
+// set, we look for XML_OUTPUT_FILE, which is set by the Bazel build
+// system.  The value of XML_OUTPUT_FILE is a filename without the
+// "xml:" prefix of GTEST_OUTPUT.
+// Note that this is meant to be called at the call site so it does
+// not check that the flag is 'output'
+// In essence this checks an env variable called XML_OUTPUT_FILE
+// and if it is set we prepend "xml:" to its value, if it not set we return ""
+std::string OutputFlagAlsoCheckEnvVar(){
+  std::string default_value_for_output_flag = "";
+  const char* xml_output_file_env = posix::GetEnv("XML_OUTPUT_FILE");
+  if (nullptr != xml_output_file_env) {
+    default_value_for_output_flag = std::string("xml:") + xml_output_file_env;
+  }
+  return default_value_for_output_flag;
+}
+
+// Reads and returns the string environment variable corresponding to
+// the given flag; if it's not set, returns default_value.
+const char* StringFromGTestEnv(const char* flag, const char* default_value) {
+#if defined(GTEST_GET_STRING_FROM_ENV_)
+  return GTEST_GET_STRING_FROM_ENV_(flag, default_value);
+#else
+  const std::string env_var = FlagToEnvVar(flag);
+  const char* const value = posix::GetEnv(env_var.c_str());
+  return value == nullptr ? default_value : value;
+#endif  // defined(GTEST_GET_STRING_FROM_ENV_)
+}
+
+}  // namespace internal
+}  // namespace testing
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Test - The Google C++ Testing and Mocking Framework
+//
+// This file implements a universal value printer that can print a
+// value of any type T:
+//
+//   void ::testing::internal::UniversalPrinter<T>::Print(value, ostream_ptr);
+//
+// It uses the << operator when possible, and prints the bytes in the
+// object otherwise.  A user can override its behavior for a class
+// type Foo by defining either operator<<(::std::ostream&, const Foo&)
+// or void PrintTo(const Foo&, ::std::ostream*) in the namespace that
+// defines Foo.
+
+
+#include <stdio.h>
+
+#include <cctype>
+#include <cstdint>
+#include <cwchar>
+#include <ostream>  // NOLINT
+#include <string>
+#include <type_traits>
+
+
+namespace testing {
+
+namespace {
+
+using ::std::ostream;
+
+// Prints a segment of bytes in the given object.
+GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
+GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
+GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
+void PrintByteSegmentInObjectTo(const unsigned char* obj_bytes, size_t start,
+                                size_t count, ostream* os) {
+  char text[5] = "";
+  for (size_t i = 0; i != count; i++) {
+    const size_t j = start + i;
+    if (i != 0) {
+      // Organizes the bytes into groups of 2 for easy parsing by
+      // human.
+      if ((j % 2) == 0)
+        *os << ' ';
+      else
+        *os << '-';
+    }
+    GTEST_SNPRINTF_(text, sizeof(text), "%02X", obj_bytes[j]);
+    *os << text;
+  }
+}
+
+// Prints the bytes in the given value to the given ostream.
+void PrintBytesInObjectToImpl(const unsigned char* obj_bytes, size_t count,
+                              ostream* os) {
+  // Tells the user how big the object is.
+  *os << count << "-byte object <";
+
+  const size_t kThreshold = 132;
+  const size_t kChunkSize = 64;
+  // If the object size is bigger than kThreshold, we'll have to omit
+  // some details by printing only the first and the last kChunkSize
+  // bytes.
+  if (count < kThreshold) {
+    PrintByteSegmentInObjectTo(obj_bytes, 0, count, os);
+  } else {
+    PrintByteSegmentInObjectTo(obj_bytes, 0, kChunkSize, os);
+    *os << " ... ";
+    // Rounds up to 2-byte boundary.
+    const size_t resume_pos = (count - kChunkSize + 1)/2*2;
+    PrintByteSegmentInObjectTo(obj_bytes, resume_pos, count - resume_pos, os);
+  }
+  *os << ">";
+}
+
+// Helpers for widening a character to char32_t. Since the standard does not
+// specify if char / wchar_t is signed or unsigned, it is important to first
+// convert it to the unsigned type of the same width before widening it to
+// char32_t.
+template <typename CharType>
+char32_t ToChar32(CharType in) {
+  return static_cast<char32_t>(
+      static_cast<typename std::make_unsigned<CharType>::type>(in));
+}
+
+}  // namespace
+
+namespace internal {
+
+// Delegates to PrintBytesInObjectToImpl() to print the bytes in the
+// given object.  The delegation simplifies the implementation, which
+// uses the << operator and thus is easier done outside of the
+// ::testing::internal namespace, which contains a << operator that
+// sometimes conflicts with the one in STL.
+void PrintBytesInObjectTo(const unsigned char* obj_bytes, size_t count,
+                          ostream* os) {
+  PrintBytesInObjectToImpl(obj_bytes, count, os);
+}
+
+// Depending on the value of a char (or wchar_t), we print it in one
+// of three formats:
+//   - as is if it's a printable ASCII (e.g. 'a', '2', ' '),
+//   - as a hexadecimal escape sequence (e.g. '\x7F'), or
+//   - as a special escape sequence (e.g. '\r', '\n').
+enum CharFormat {
+  kAsIs,
+  kHexEscape,
+  kSpecialEscape
+};
+
+// Returns true if c is a printable ASCII character.  We test the
+// value of c directly instead of calling isprint(), which is buggy on
+// Windows Mobile.
+inline bool IsPrintableAscii(char32_t c) { return 0x20 <= c && c <= 0x7E; }
+
+// Prints c (of type char, char8_t, char16_t, char32_t, or wchar_t) as a
+// character literal without the quotes, escaping it when necessary; returns how
+// c was formatted.
+template <typename Char>
+static CharFormat PrintAsCharLiteralTo(Char c, ostream* os) {
+  const char32_t u_c = ToChar32(c);
+  switch (u_c) {
+    case L'\0':
+      *os << "\\0";
+      break;
+    case L'\'':
+      *os << "\\'";
+      break;
+    case L'\\':
+      *os << "\\\\";
+      break;
+    case L'\a':
+      *os << "\\a";
+      break;
+    case L'\b':
+      *os << "\\b";
+      break;
+    case L'\f':
+      *os << "\\f";
+      break;
+    case L'\n':
+      *os << "\\n";
+      break;
+    case L'\r':
+      *os << "\\r";
+      break;
+    case L'\t':
+      *os << "\\t";
+      break;
+    case L'\v':
+      *os << "\\v";
+      break;
+    default:
+      if (IsPrintableAscii(u_c)) {
+        *os << static_cast<char>(c);
+        return kAsIs;
+      } else {
+        ostream::fmtflags flags = os->flags();
+        *os << "\\x" << std::hex << std::uppercase << static_cast<int>(u_c);
+        os->flags(flags);
+        return kHexEscape;
+      }
+  }
+  return kSpecialEscape;
+}
+
+// Prints a char32_t c as if it's part of a string literal, escaping it when
+// necessary; returns how c was formatted.
+static CharFormat PrintAsStringLiteralTo(char32_t c, ostream* os) {
+  switch (c) {
+    case L'\'':
+      *os << "'";
+      return kAsIs;
+    case L'"':
+      *os << "\\\"";
+      return kSpecialEscape;
+    default:
+      return PrintAsCharLiteralTo(c, os);
+  }
+}
+
+static const char* GetCharWidthPrefix(char) {
+  return "";
+}
+
+static const char* GetCharWidthPrefix(signed char) {
+  return "";
+}
+
+static const char* GetCharWidthPrefix(unsigned char) {
+  return "";
+}
+
+#ifdef __cpp_char8_t
+static const char* GetCharWidthPrefix(char8_t) {
+  return "u8";
+}
+#endif
+
+static const char* GetCharWidthPrefix(char16_t) {
+  return "u";
+}
+
+static const char* GetCharWidthPrefix(char32_t) {
+  return "U";
+}
+
+static const char* GetCharWidthPrefix(wchar_t) {
+  return "L";
+}
+
+// Prints a char c as if it's part of a string literal, escaping it when
+// necessary; returns how c was formatted.
+static CharFormat PrintAsStringLiteralTo(char c, ostream* os) {
+  return PrintAsStringLiteralTo(ToChar32(c), os);
+}
+
+#ifdef __cpp_char8_t
+static CharFormat PrintAsStringLiteralTo(char8_t c, ostream* os) {
+  return PrintAsStringLiteralTo(ToChar32(c), os);
+}
+#endif
+
+static CharFormat PrintAsStringLiteralTo(char16_t c, ostream* os) {
+  return PrintAsStringLiteralTo(ToChar32(c), os);
+}
+
+static CharFormat PrintAsStringLiteralTo(wchar_t c, ostream* os) {
+  return PrintAsStringLiteralTo(ToChar32(c), os);
+}
+
+// Prints a character c (of type char, char8_t, char16_t, char32_t, or wchar_t)
+// and its code. '\0' is printed as "'\\0'", other unprintable characters are
+// also properly escaped using the standard C++ escape sequence.
+template <typename Char>
+void PrintCharAndCodeTo(Char c, ostream* os) {
+  // First, print c as a literal in the most readable form we can find.
+  *os << GetCharWidthPrefix(c) << "'";
+  const CharFormat format = PrintAsCharLiteralTo(c, os);
+  *os << "'";
+
+  // To aid user debugging, we also print c's code in decimal, unless
+  // it's 0 (in which case c was printed as '\\0', making the code
+  // obvious).
+  if (c == 0)
+    return;
+  *os << " (" << static_cast<int>(c);
+
+  // For more convenience, we print c's code again in hexadecimal,
+  // unless c was already printed in the form '\x##' or the code is in
+  // [1, 9].
+  if (format == kHexEscape || (1 <= c && c <= 9)) {
+    // Do nothing.
+  } else {
+    *os << ", 0x" << String::FormatHexInt(static_cast<int>(c));
+  }
+  *os << ")";
+}
+
+void PrintTo(unsigned char c, ::std::ostream* os) { PrintCharAndCodeTo(c, os); }
+void PrintTo(signed char c, ::std::ostream* os) { PrintCharAndCodeTo(c, os); }
+
+// Prints a wchar_t as a symbol if it is printable or as its internal
+// code otherwise and also as its code.  L'\0' is printed as "L'\\0'".
+void PrintTo(wchar_t wc, ostream* os) { PrintCharAndCodeTo(wc, os); }
+
+// TODO(dcheng): Consider making this delegate to PrintCharAndCodeTo() as well.
+void PrintTo(char32_t c, ::std::ostream* os) {
+  *os << std::hex << "U+" << std::uppercase << std::setfill('0') << std::setw(4)
+      << static_cast<uint32_t>(c);
+}
+
+// Prints the given array of characters to the ostream.  CharType must be either
+// char, char8_t, char16_t, char32_t, or wchar_t.
+// The array starts at begin, the length is len, it may include '\0' characters
+// and may not be NUL-terminated.
+template <typename CharType>
+GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
+GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
+GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
+static CharFormat PrintCharsAsStringTo(
+    const CharType* begin, size_t len, ostream* os) {
+  const char* const quote_prefix = GetCharWidthPrefix(*begin);
+  *os << quote_prefix << "\"";
+  bool is_previous_hex = false;
+  CharFormat print_format = kAsIs;
+  for (size_t index = 0; index < len; ++index) {
+    const CharType cur = begin[index];
+    if (is_previous_hex && IsXDigit(cur)) {
+      // Previous character is of '\x..' form and this character can be
+      // interpreted as another hexadecimal digit in its number. Break string to
+      // disambiguate.
+      *os << "\" " << quote_prefix << "\"";
+    }
+    is_previous_hex = PrintAsStringLiteralTo(cur, os) == kHexEscape;
+    // Remember if any characters required hex escaping.
+    if (is_previous_hex) {
+      print_format = kHexEscape;
+    }
+  }
+  *os << "\"";
+  return print_format;
+}
+
+// Prints a (const) char/wchar_t array of 'len' elements, starting at address
+// 'begin'.  CharType must be either char or wchar_t.
+template <typename CharType>
+GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
+GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
+GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
+static void UniversalPrintCharArray(
+    const CharType* begin, size_t len, ostream* os) {
+  // The code
+  //   const char kFoo[] = "foo";
+  // generates an array of 4, not 3, elements, with the last one being '\0'.
+  //
+  // Therefore when printing a char array, we don't print the last element if
+  // it's '\0', such that the output matches the string literal as it's
+  // written in the source code.
+  if (len > 0 && begin[len - 1] == '\0') {
+    PrintCharsAsStringTo(begin, len - 1, os);
+    return;
+  }
+
+  // If, however, the last element in the array is not '\0', e.g.
+  //    const char kFoo[] = { 'f', 'o', 'o' };
+  // we must print the entire array.  We also print a message to indicate
+  // that the array is not NUL-terminated.
+  PrintCharsAsStringTo(begin, len, os);
+  *os << " (no terminating NUL)";
+}
+
+// Prints a (const) char array of 'len' elements, starting at address 'begin'.
+void UniversalPrintArray(const char* begin, size_t len, ostream* os) {
+  UniversalPrintCharArray(begin, len, os);
+}
+
+#ifdef __cpp_char8_t
+// Prints a (const) char8_t array of 'len' elements, starting at address
+// 'begin'.
+void UniversalPrintArray(const char8_t* begin, size_t len, ostream* os) {
+  UniversalPrintCharArray(begin, len, os);
+}
+#endif
+
+// Prints a (const) char16_t array of 'len' elements, starting at address
+// 'begin'.
+void UniversalPrintArray(const char16_t* begin, size_t len, ostream* os) {
+  UniversalPrintCharArray(begin, len, os);
+}
+
+// Prints a (const) char32_t array of 'len' elements, starting at address
+// 'begin'.
+void UniversalPrintArray(const char32_t* begin, size_t len, ostream* os) {
+  UniversalPrintCharArray(begin, len, os);
+}
+
+// Prints a (const) wchar_t array of 'len' elements, starting at address
+// 'begin'.
+void UniversalPrintArray(const wchar_t* begin, size_t len, ostream* os) {
+  UniversalPrintCharArray(begin, len, os);
+}
+
+namespace {
+
+// Prints a null-terminated C-style string to the ostream.
+template <typename Char>
+void PrintCStringTo(const Char* s, ostream* os) {
+  if (s == nullptr) {
+    *os << "NULL";
+  } else {
+    *os << ImplicitCast_<const void*>(s) << " pointing to ";
+    PrintCharsAsStringTo(s, std::char_traits<Char>::length(s), os);
+  }
+}
+
+}  // anonymous namespace
+
+void PrintTo(const char* s, ostream* os) { PrintCStringTo(s, os); }
+
+#ifdef __cpp_char8_t
+void PrintTo(const char8_t* s, ostream* os) { PrintCStringTo(s, os); }
+#endif
+
+void PrintTo(const char16_t* s, ostream* os) { PrintCStringTo(s, os); }
+
+void PrintTo(const char32_t* s, ostream* os) { PrintCStringTo(s, os); }
+
+// MSVC compiler can be configured to define whar_t as a typedef
+// of unsigned short. Defining an overload for const wchar_t* in that case
+// would cause pointers to unsigned shorts be printed as wide strings,
+// possibly accessing more memory than intended and causing invalid
+// memory accesses. MSVC defines _NATIVE_WCHAR_T_DEFINED symbol when
+// wchar_t is implemented as a native type.
+#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
+// Prints the given wide C string to the ostream.
+void PrintTo(const wchar_t* s, ostream* os) { PrintCStringTo(s, os); }
+#endif  // wchar_t is native
+
+namespace {
+
+bool ContainsUnprintableControlCodes(const char* str, size_t length) {
+  const unsigned char *s = reinterpret_cast<const unsigned char *>(str);
+
+  for (size_t i = 0; i < length; i++) {
+    unsigned char ch = *s++;
+    if (std::iscntrl(ch)) {
+        switch (ch) {
+        case '\t':
+        case '\n':
+        case '\r':
+          break;
+        default:
+          return true;
+        }
+      }
+  }
+  return false;
+}
+
+bool IsUTF8TrailByte(unsigned char t) { return 0x80 <= t && t<= 0xbf; }
+
+bool IsValidUTF8(const char* str, size_t length) {
+  const unsigned char *s = reinterpret_cast<const unsigned char *>(str);
+
+  for (size_t i = 0; i < length;) {
+    unsigned char lead = s[i++];
+
+    if (lead <= 0x7f) {
+      continue;  // single-byte character (ASCII) 0..7F
+    }
+    if (lead < 0xc2) {
+      return false;  // trail byte or non-shortest form
+    } else if (lead <= 0xdf && (i + 1) <= length && IsUTF8TrailByte(s[i])) {
+      ++i;  // 2-byte character
+    } else if (0xe0 <= lead && lead <= 0xef && (i + 2) <= length &&
+               IsUTF8TrailByte(s[i]) &&
+               IsUTF8TrailByte(s[i + 1]) &&
+               // check for non-shortest form and surrogate
+               (lead != 0xe0 || s[i] >= 0xa0) &&
+               (lead != 0xed || s[i] < 0xa0)) {
+      i += 2;  // 3-byte character
+    } else if (0xf0 <= lead && lead <= 0xf4 && (i + 3) <= length &&
+               IsUTF8TrailByte(s[i]) &&
+               IsUTF8TrailByte(s[i + 1]) &&
+               IsUTF8TrailByte(s[i + 2]) &&
+               // check for non-shortest form
+               (lead != 0xf0 || s[i] >= 0x90) &&
+               (lead != 0xf4 || s[i] < 0x90)) {
+      i += 3;  // 4-byte character
+    } else {
+      return false;
+    }
+  }
+  return true;
+}
+
+void ConditionalPrintAsText(const char* str, size_t length, ostream* os) {
+  if (!ContainsUnprintableControlCodes(str, length) &&
+      IsValidUTF8(str, length)) {
+    *os << "\n    As Text: \"" << str << "\"";
+  }
+}
+
+}  // anonymous namespace
+
+void PrintStringTo(const ::std::string& s, ostream* os) {
+  if (PrintCharsAsStringTo(s.data(), s.size(), os) == kHexEscape) {
+    if (GTEST_FLAG(print_utf8)) {
+      ConditionalPrintAsText(s.data(), s.size(), os);
+    }
+  }
+}
+
+#ifdef __cpp_char8_t
+void PrintU8StringTo(const ::std::u8string& s, ostream* os) {
+  PrintCharsAsStringTo(s.data(), s.size(), os);
+}
+#endif
+
+void PrintU16StringTo(const ::std::u16string& s, ostream* os) {
+  PrintCharsAsStringTo(s.data(), s.size(), os);
+}
+
+void PrintU32StringTo(const ::std::u32string& s, ostream* os) {
+  PrintCharsAsStringTo(s.data(), s.size(), os);
+}
+
+#if GTEST_HAS_STD_WSTRING
+void PrintWideStringTo(const ::std::wstring& s, ostream* os) {
+  PrintCharsAsStringTo(s.data(), s.size(), os);
+}
+#endif  // GTEST_HAS_STD_WSTRING
+
+}  // namespace internal
+
+}  // namespace testing
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//
+// The Google C++ Testing and Mocking Framework (Google Test)
+
+
+
+namespace testing {
+
+using internal::GetUnitTestImpl;
+
+// Gets the summary of the failure message by omitting the stack trace
+// in it.
+std::string TestPartResult::ExtractSummary(const char* message) {
+  const char* const stack_trace = strstr(message, internal::kStackTraceMarker);
+  return stack_trace == nullptr ? message : std::string(message, stack_trace);
+}
+
+// Prints a TestPartResult object.
+std::ostream& operator<<(std::ostream& os, const TestPartResult& result) {
+  return os << internal::FormatFileLocation(result.file_name(),
+                                            result.line_number())
+            << " "
+            << (result.type() == TestPartResult::kSuccess
+                    ? "Success"
+                    : result.type() == TestPartResult::kSkip
+                          ? "Skipped"
+                          : result.type() == TestPartResult::kFatalFailure
+                                ? "Fatal failure"
+                                : "Non-fatal failure")
+            << ":\n"
+            << result.message() << std::endl;
+}
+
+// Appends a TestPartResult to the array.
+void TestPartResultArray::Append(const TestPartResult& result) {
+  array_.push_back(result);
+}
+
+// Returns the TestPartResult at the given index (0-based).
+const TestPartResult& TestPartResultArray::GetTestPartResult(int index) const {
+  if (index < 0 || index >= size()) {
+    printf("\nInvalid index (%d) into TestPartResultArray.\n", index);
+    internal::posix::Abort();
+  }
+
+  return array_[static_cast<size_t>(index)];
+}
+
+// Returns the number of TestPartResult objects in the array.
+int TestPartResultArray::size() const {
+  return static_cast<int>(array_.size());
+}
+
+namespace internal {
+
+HasNewFatalFailureHelper::HasNewFatalFailureHelper()
+    : has_new_fatal_failure_(false),
+      original_reporter_(GetUnitTestImpl()->
+                         GetTestPartResultReporterForCurrentThread()) {
+  GetUnitTestImpl()->SetTestPartResultReporterForCurrentThread(this);
+}
+
+HasNewFatalFailureHelper::~HasNewFatalFailureHelper() {
+  GetUnitTestImpl()->SetTestPartResultReporterForCurrentThread(
+      original_reporter_);
+}
+
+void HasNewFatalFailureHelper::ReportTestPartResult(
+    const TestPartResult& result) {
+  if (result.fatally_failed())
+    has_new_fatal_failure_ = true;
+  original_reporter_->ReportTestPartResult(result);
+}
+
+}  // namespace internal
+
+}  // namespace testing
+// Copyright 2008 Google Inc.
+// All Rights Reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+
+
+namespace testing {
+namespace internal {
+
+// Skips to the first non-space char in str. Returns an empty string if str
+// contains only whitespace characters.
+static const char* SkipSpaces(const char* str) {
+  while (IsSpace(*str))
+    str++;
+  return str;
+}
+
+static std::vector<std::string> SplitIntoTestNames(const char* src) {
+  std::vector<std::string> name_vec;
+  src = SkipSpaces(src);
+  for (; src != nullptr; src = SkipComma(src)) {
+    name_vec.push_back(StripTrailingSpaces(GetPrefixUntilComma(src)));
+  }
+  return name_vec;
+}
+
+// Verifies that registered_tests match the test names in
+// registered_tests_; returns registered_tests if successful, or
+// aborts the program otherwise.
+const char* TypedTestSuitePState::VerifyRegisteredTestNames(
+    const char* test_suite_name, const char* file, int line,
+    const char* registered_tests) {
+  RegisterTypeParameterizedTestSuite(test_suite_name, CodeLocation(file, line));
+
+  typedef RegisteredTestsMap::const_iterator RegisteredTestIter;
+  registered_ = true;
+
+  std::vector<std::string> name_vec = SplitIntoTestNames(registered_tests);
+
+  Message errors;
+
+  std::set<std::string> tests;
+  for (std::vector<std::string>::const_iterator name_it = name_vec.begin();
+       name_it != name_vec.end(); ++name_it) {
+    const std::string& name = *name_it;
+    if (tests.count(name) != 0) {
+      errors << "Test " << name << " is listed more than once.\n";
+      continue;
+    }
+
+    if (registered_tests_.count(name) != 0) {
+      tests.insert(name);
+    } else {
+      errors << "No test named " << name
+             << " can be found in this test suite.\n";
+    }
+  }
+
+  for (RegisteredTestIter it = registered_tests_.begin();
+       it != registered_tests_.end();
+       ++it) {
+    if (tests.count(it->first) == 0) {
+      errors << "You forgot to list test " << it->first << ".\n";
+    }
+  }
+
+  const std::string& errors_str = errors.GetString();
+  if (errors_str != "") {
+    fprintf(stderr, "%s %s", FormatFileLocation(file, line).c_str(),
+            errors_str.c_str());
+    fflush(stderr);
+    posix::Abort();
+  }
+
+  return registered_tests;
+}
+
+}  // namespace internal
+}  // namespace testing
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//
+// Google C++ Mocking Framework (Google Mock)
+//
+// This file #includes all Google Mock implementation .cc files.  The
+// purpose is to allow a user to build Google Mock by compiling this
+// file alone.
+
+// This line ensures that gmock.h can be compiled on its own, even
+// when it's fused.
+#include "gmock/gmock.h"
+
+// The following lines pull in the real gmock *.cc files.
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// This file implements cardinalities.
+
+
+#include <limits.h>
+#include <ostream>  // NOLINT
+#include <sstream>
+#include <string>
+
+namespace testing {
+
+namespace {
+
+// Implements the Between(m, n) cardinality.
+class BetweenCardinalityImpl : public CardinalityInterface {
+ public:
+  BetweenCardinalityImpl(int min, int max)
+      : min_(min >= 0 ? min : 0),
+        max_(max >= min_ ? max : min_) {
+    std::stringstream ss;
+    if (min < 0) {
+      ss << "The invocation lower bound must be >= 0, "
+         << "but is actually " << min << ".";
+      internal::Expect(false, __FILE__, __LINE__, ss.str());
+    } else if (max < 0) {
+      ss << "The invocation upper bound must be >= 0, "
+         << "but is actually " << max << ".";
+      internal::Expect(false, __FILE__, __LINE__, ss.str());
+    } else if (min > max) {
+      ss << "The invocation upper bound (" << max
+         << ") must be >= the invocation lower bound (" << min
+         << ").";
+      internal::Expect(false, __FILE__, __LINE__, ss.str());
+    }
+  }
+
+  // Conservative estimate on the lower/upper bound of the number of
+  // calls allowed.
+  int ConservativeLowerBound() const override { return min_; }
+  int ConservativeUpperBound() const override { return max_; }
+
+  bool IsSatisfiedByCallCount(int call_count) const override {
+    return min_ <= call_count && call_count <= max_;
+  }
+
+  bool IsSaturatedByCallCount(int call_count) const override {
+    return call_count >= max_;
+  }
+
+  void DescribeTo(::std::ostream* os) const override;
+
+ private:
+  const int min_;
+  const int max_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(BetweenCardinalityImpl);
+};
+
+// Formats "n times" in a human-friendly way.
+inline std::string FormatTimes(int n) {
+  if (n == 1) {
+    return "once";
+  } else if (n == 2) {
+    return "twice";
+  } else {
+    std::stringstream ss;
+    ss << n << " times";
+    return ss.str();
+  }
+}
+
+// Describes the Between(m, n) cardinality in human-friendly text.
+void BetweenCardinalityImpl::DescribeTo(::std::ostream* os) const {
+  if (min_ == 0) {
+    if (max_ == 0) {
+      *os << "never called";
+    } else if (max_ == INT_MAX) {
+      *os << "called any number of times";
+    } else {
+      *os << "called at most " << FormatTimes(max_);
+    }
+  } else if (min_ == max_) {
+    *os << "called " << FormatTimes(min_);
+  } else if (max_ == INT_MAX) {
+    *os << "called at least " << FormatTimes(min_);
+  } else {
+    // 0 < min_ < max_ < INT_MAX
+    *os << "called between " << min_ << " and " << max_ << " times";
+  }
+}
+
+}  // Unnamed namespace
+
+// Describes the given call count to an ostream.
+void Cardinality::DescribeActualCallCountTo(int actual_call_count,
+                                            ::std::ostream* os) {
+  if (actual_call_count > 0) {
+    *os << "called " << FormatTimes(actual_call_count);
+  } else {
+    *os << "never called";
+  }
+}
+
+// Creates a cardinality that allows at least n calls.
+GTEST_API_ Cardinality AtLeast(int n) { return Between(n, INT_MAX); }
+
+// Creates a cardinality that allows at most n calls.
+GTEST_API_ Cardinality AtMost(int n) { return Between(0, n); }
+
+// Creates a cardinality that allows any number of calls.
+GTEST_API_ Cardinality AnyNumber() { return AtLeast(0); }
+
+// Creates a cardinality that allows between min and max calls.
+GTEST_API_ Cardinality Between(int min, int max) {
+  return Cardinality(new BetweenCardinalityImpl(min, max));
+}
+
+// Creates a cardinality that allows exactly n calls.
+GTEST_API_ Cardinality Exactly(int n) { return Between(n, n); }
+
+}  // namespace testing
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// This file defines some utilities useful for implementing Google
+// Mock.  They are subject to change without notice, so please DO NOT
+// USE THEM IN USER CODE.
+
+
+#include <ctype.h>
+#include <ostream>  // NOLINT
+#include <string>
+
+namespace testing {
+namespace internal {
+
+// Joins a vector of strings as if they are fields of a tuple; returns
+// the joined string.
+GTEST_API_ std::string JoinAsTuple(const Strings& fields) {
+  switch (fields.size()) {
+    case 0:
+      return "";
+    case 1:
+      return fields[0];
+    default:
+      std::string result = "(" + fields[0];
+      for (size_t i = 1; i < fields.size(); i++) {
+        result += ", ";
+        result += fields[i];
+      }
+      result += ")";
+      return result;
+  }
+}
+
+// Converts an identifier name to a space-separated list of lower-case
+// words.  Each maximum substring of the form [A-Za-z][a-z]*|\d+ is
+// treated as one word.  For example, both "FooBar123" and
+// "foo_bar_123" are converted to "foo bar 123".
+GTEST_API_ std::string ConvertIdentifierNameToWords(const char* id_name) {
+  std::string result;
+  char prev_char = '\0';
+  for (const char* p = id_name; *p != '\0'; prev_char = *(p++)) {
+    // We don't care about the current locale as the input is
+    // guaranteed to be a valid C++ identifier name.
+    const bool starts_new_word = IsUpper(*p) ||
+        (!IsAlpha(prev_char) && IsLower(*p)) ||
+        (!IsDigit(prev_char) && IsDigit(*p));
+
+    if (IsAlNum(*p)) {
+      if (starts_new_word && result != "")
+        result += ' ';
+      result += ToLower(*p);
+    }
+  }
+  return result;
+}
+
+// This class reports Google Mock failures as Google Test failures.  A
+// user can define another class in a similar fashion if they intend to
+// use Google Mock with a testing framework other than Google Test.
+class GoogleTestFailureReporter : public FailureReporterInterface {
+ public:
+  void ReportFailure(FailureType type, const char* file, int line,
+                     const std::string& message) override {
+    AssertHelper(type == kFatal ?
+                 TestPartResult::kFatalFailure :
+                 TestPartResult::kNonFatalFailure,
+                 file,
+                 line,
+                 message.c_str()) = Message();
+    if (type == kFatal) {
+      posix::Abort();
+    }
+  }
+};
+
+// Returns the global failure reporter.  Will create a
+// GoogleTestFailureReporter and return it the first time called.
+GTEST_API_ FailureReporterInterface* GetFailureReporter() {
+  // Points to the global failure reporter used by Google Mock.  gcc
+  // guarantees that the following use of failure_reporter is
+  // thread-safe.  We may need to add additional synchronization to
+  // protect failure_reporter if we port Google Mock to other
+  // compilers.
+  static FailureReporterInterface* const failure_reporter =
+      new GoogleTestFailureReporter();
+  return failure_reporter;
+}
+
+// Protects global resources (stdout in particular) used by Log().
+static GTEST_DEFINE_STATIC_MUTEX_(g_log_mutex);
+
+// Returns true if and only if a log with the given severity is visible
+// according to the --gmock_verbose flag.
+GTEST_API_ bool LogIsVisible(LogSeverity severity) {
+  if (GMOCK_FLAG(verbose) == kInfoVerbosity) {
+    // Always show the log if --gmock_verbose=info.
+    return true;
+  } else if (GMOCK_FLAG(verbose) == kErrorVerbosity) {
+    // Always hide it if --gmock_verbose=error.
+    return false;
+  } else {
+    // If --gmock_verbose is neither "info" nor "error", we treat it
+    // as "warning" (its default value).
+    return severity == kWarning;
+  }
+}
+
+// Prints the given message to stdout if and only if 'severity' >= the level
+// specified by the --gmock_verbose flag.  If stack_frames_to_skip >=
+// 0, also prints the stack trace excluding the top
+// stack_frames_to_skip frames.  In opt mode, any positive
+// stack_frames_to_skip is treated as 0, since we don't know which
+// function calls will be inlined by the compiler and need to be
+// conservative.
+GTEST_API_ void Log(LogSeverity severity, const std::string& message,
+                    int stack_frames_to_skip) {
+  if (!LogIsVisible(severity))
+    return;
+
+  // Ensures that logs from different threads don't interleave.
+  MutexLock l(&g_log_mutex);
+
+  if (severity == kWarning) {
+    // Prints a GMOCK WARNING marker to make the warnings easily searchable.
+    std::cout << "\nGMOCK WARNING:";
+  }
+  // Pre-pends a new-line to message if it doesn't start with one.
+  if (message.empty() || message[0] != '\n') {
+    std::cout << "\n";
+  }
+  std::cout << message;
+  if (stack_frames_to_skip >= 0) {
+#ifdef NDEBUG
+    // In opt mode, we have to be conservative and skip no stack frame.
+    const int actual_to_skip = 0;
+#else
+    // In dbg mode, we can do what the caller tell us to do (plus one
+    // for skipping this function's stack frame).
+    const int actual_to_skip = stack_frames_to_skip + 1;
+#endif  // NDEBUG
+
+    // Appends a new-line to message if it doesn't end with one.
+    if (!message.empty() && *message.rbegin() != '\n') {
+      std::cout << "\n";
+    }
+    std::cout << "Stack trace:\n"
+         << ::testing::internal::GetCurrentOsStackTraceExceptTop(
+             ::testing::UnitTest::GetInstance(), actual_to_skip);
+  }
+  std::cout << ::std::flush;
+}
+
+GTEST_API_ WithoutMatchers GetWithoutMatchers() { return WithoutMatchers(); }
+
+GTEST_API_ void IllegalDoDefault(const char* file, int line) {
+  internal::Assert(
+      false, file, line,
+      "You are using DoDefault() inside a composite action like "
+      "DoAll() or WithArgs().  This is not supported for technical "
+      "reasons.  Please instead spell out the default action, or "
+      "assign the default action to an Action variable and use "
+      "the variable in various places.");
+}
+
+}  // namespace internal
+}  // namespace testing
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// This file implements Matcher<const string&>, Matcher<string>, and
+// utilities for defining matchers.
+
+
+#include <string.h>
+#include <iostream>
+#include <sstream>
+#include <string>
+
+namespace testing {
+namespace internal {
+
+// Returns the description for a matcher defined using the MATCHER*()
+// macro where the user-supplied description string is "", if
+// 'negation' is false; otherwise returns the description of the
+// negation of the matcher.  'param_values' contains a list of strings
+// that are the print-out of the matcher's parameters.
+GTEST_API_ std::string FormatMatcherDescription(bool negation,
+                                                const char* matcher_name,
+                                                const Strings& param_values) {
+  std::string result = ConvertIdentifierNameToWords(matcher_name);
+  if (param_values.size() >= 1) result += " " + JoinAsTuple(param_values);
+  return negation ? "not (" + result + ")" : result;
+}
+
+// FindMaxBipartiteMatching and its helper class.
+//
+// Uses the well-known Ford-Fulkerson max flow method to find a maximum
+// bipartite matching. Flow is considered to be from left to right.
+// There is an implicit source node that is connected to all of the left
+// nodes, and an implicit sink node that is connected to all of the
+// right nodes. All edges have unit capacity.
+//
+// Neither the flow graph nor the residual flow graph are represented
+// explicitly. Instead, they are implied by the information in 'graph' and
+// a vector<int> called 'left_' whose elements are initialized to the
+// value kUnused. This represents the initial state of the algorithm,
+// where the flow graph is empty, and the residual flow graph has the
+// following edges:
+//   - An edge from source to each left_ node
+//   - An edge from each right_ node to sink
+//   - An edge from each left_ node to each right_ node, if the
+//     corresponding edge exists in 'graph'.
+//
+// When the TryAugment() method adds a flow, it sets left_[l] = r for some
+// nodes l and r. This induces the following changes:
+//   - The edges (source, l), (l, r), and (r, sink) are added to the
+//     flow graph.
+//   - The same three edges are removed from the residual flow graph.
+//   - The reverse edges (l, source), (r, l), and (sink, r) are added
+//     to the residual flow graph, which is a directional graph
+//     representing unused flow capacity.
+//
+// When the method augments a flow (moving left_[l] from some r1 to some
+// other r2), this can be thought of as "undoing" the above steps with
+// respect to r1 and "redoing" them with respect to r2.
+//
+// It bears repeating that the flow graph and residual flow graph are
+// never represented explicitly, but can be derived by looking at the
+// information in 'graph' and in left_.
+//
+// As an optimization, there is a second vector<int> called right_ which
+// does not provide any new information. Instead, it enables more
+// efficient queries about edges entering or leaving the right-side nodes
+// of the flow or residual flow graphs. The following invariants are
+// maintained:
+//
+// left[l] == kUnused or right[left[l]] == l
+// right[r] == kUnused or left[right[r]] == r
+//
+// . [ source ]                                        .
+// .   |||                                             .
+// .   |||                                             .
+// .   ||\--> left[0]=1  ---\    right[0]=-1 ----\     .
+// .   ||                   |                    |     .
+// .   |\---> left[1]=-1    \--> right[1]=0  ---\|     .
+// .   |                                        ||     .
+// .   \----> left[2]=2  ------> right[2]=2  --\||     .
+// .                                           |||     .
+// .         elements           matchers       vvv     .
+// .                                         [ sink ]  .
+//
+// See Also:
+//   [1] Cormen, et al (2001). "Section 26.2: The Ford-Fulkerson method".
+//       "Introduction to Algorithms (Second ed.)", pp. 651-664.
+//   [2] "Ford-Fulkerson algorithm", Wikipedia,
+//       'http://en.wikipedia.org/wiki/Ford%E2%80%93Fulkerson_algorithm'
+class MaxBipartiteMatchState {
+ public:
+  explicit MaxBipartiteMatchState(const MatchMatrix& graph)
+      : graph_(&graph),
+        left_(graph_->LhsSize(), kUnused),
+        right_(graph_->RhsSize(), kUnused) {}
+
+  // Returns the edges of a maximal match, each in the form {left, right}.
+  ElementMatcherPairs Compute() {
+    // 'seen' is used for path finding { 0: unseen, 1: seen }.
+    ::std::vector<char> seen;
+    // Searches the residual flow graph for a path from each left node to
+    // the sink in the residual flow graph, and if one is found, add flow
+    // to the graph. It's okay to search through the left nodes once. The
+    // edge from the implicit source node to each previously-visited left
+    // node will have flow if that left node has any path to the sink
+    // whatsoever. Subsequent augmentations can only add flow to the
+    // network, and cannot take away that previous flow unit from the source.
+    // Since the source-to-left edge can only carry one flow unit (or,
+    // each element can be matched to only one matcher), there is no need
+    // to visit the left nodes more than once looking for augmented paths.
+    // The flow is known to be possible or impossible by looking at the
+    // node once.
+    for (size_t ilhs = 0; ilhs < graph_->LhsSize(); ++ilhs) {
+      // Reset the path-marking vector and try to find a path from
+      // source to sink starting at the left_[ilhs] node.
+      GTEST_CHECK_(left_[ilhs] == kUnused)
+          << "ilhs: " << ilhs << ", left_[ilhs]: " << left_[ilhs];
+      // 'seen' initialized to 'graph_->RhsSize()' copies of 0.
+      seen.assign(graph_->RhsSize(), 0);
+      TryAugment(ilhs, &seen);
+    }
+    ElementMatcherPairs result;
+    for (size_t ilhs = 0; ilhs < left_.size(); ++ilhs) {
+      size_t irhs = left_[ilhs];
+      if (irhs == kUnused) continue;
+      result.push_back(ElementMatcherPair(ilhs, irhs));
+    }
+    return result;
+  }
+
+ private:
+  static const size_t kUnused = static_cast<size_t>(-1);
+
+  // Perform a depth-first search from left node ilhs to the sink.  If a
+  // path is found, flow is added to the network by linking the left and
+  // right vector elements corresponding each segment of the path.
+  // Returns true if a path to sink was found, which means that a unit of
+  // flow was added to the network. The 'seen' vector elements correspond
+  // to right nodes and are marked to eliminate cycles from the search.
+  //
+  // Left nodes will only be explored at most once because they
+  // are accessible from at most one right node in the residual flow
+  // graph.
+  //
+  // Note that left_[ilhs] is the only element of left_ that TryAugment will
+  // potentially transition from kUnused to another value. Any other
+  // left_ element holding kUnused before TryAugment will be holding it
+  // when TryAugment returns.
+  //
+  bool TryAugment(size_t ilhs, ::std::vector<char>* seen) {
+    for (size_t irhs = 0; irhs < graph_->RhsSize(); ++irhs) {
+      if ((*seen)[irhs]) continue;
+      if (!graph_->HasEdge(ilhs, irhs)) continue;
+      // There's an available edge from ilhs to irhs.
+      (*seen)[irhs] = 1;
+      // Next a search is performed to determine whether
+      // this edge is a dead end or leads to the sink.
+      //
+      // right_[irhs] == kUnused means that there is residual flow from
+      // right node irhs to the sink, so we can use that to finish this
+      // flow path and return success.
+      //
+      // Otherwise there is residual flow to some ilhs. We push flow
+      // along that path and call ourselves recursively to see if this
+      // ultimately leads to sink.
+      if (right_[irhs] == kUnused || TryAugment(right_[irhs], seen)) {
+        // Add flow from left_[ilhs] to right_[irhs].
+        left_[ilhs] = irhs;
+        right_[irhs] = ilhs;
+        return true;
+      }
+    }
+    return false;
+  }
+
+  const MatchMatrix* graph_;  // not owned
+  // Each element of the left_ vector represents a left hand side node
+  // (i.e. an element) and each element of right_ is a right hand side
+  // node (i.e. a matcher). The values in the left_ vector indicate
+  // outflow from that node to a node on the right_ side. The values
+  // in the right_ indicate inflow, and specify which left_ node is
+  // feeding that right_ node, if any. For example, left_[3] == 1 means
+  // there's a flow from element #3 to matcher #1. Such a flow would also
+  // be redundantly represented in the right_ vector as right_[1] == 3.
+  // Elements of left_ and right_ are either kUnused or mutually
+  // referent. Mutually referent means that left_[right_[i]] = i and
+  // right_[left_[i]] = i.
+  ::std::vector<size_t> left_;
+  ::std::vector<size_t> right_;
+};
+
+const size_t MaxBipartiteMatchState::kUnused;
+
+GTEST_API_ ElementMatcherPairs FindMaxBipartiteMatching(const MatchMatrix& g) {
+  return MaxBipartiteMatchState(g).Compute();
+}
+
+static void LogElementMatcherPairVec(const ElementMatcherPairs& pairs,
+                                     ::std::ostream* stream) {
+  typedef ElementMatcherPairs::const_iterator Iter;
+  ::std::ostream& os = *stream;
+  os << "{";
+  const char* sep = "";
+  for (Iter it = pairs.begin(); it != pairs.end(); ++it) {
+    os << sep << "\n  ("
+       << "element #" << it->first << ", "
+       << "matcher #" << it->second << ")";
+    sep = ",";
+  }
+  os << "\n}";
+}
+
+bool MatchMatrix::NextGraph() {
+  for (size_t ilhs = 0; ilhs < LhsSize(); ++ilhs) {
+    for (size_t irhs = 0; irhs < RhsSize(); ++irhs) {
+      char& b = matched_[SpaceIndex(ilhs, irhs)];
+      if (!b) {
+        b = 1;
+        return true;
+      }
+      b = 0;
+    }
+  }
+  return false;
+}
+
+void MatchMatrix::Randomize() {
+  for (size_t ilhs = 0; ilhs < LhsSize(); ++ilhs) {
+    for (size_t irhs = 0; irhs < RhsSize(); ++irhs) {
+      char& b = matched_[SpaceIndex(ilhs, irhs)];
+      b = static_cast<char>(rand() & 1);  // NOLINT
+    }
+  }
+}
+
+std::string MatchMatrix::DebugString() const {
+  ::std::stringstream ss;
+  const char* sep = "";
+  for (size_t i = 0; i < LhsSize(); ++i) {
+    ss << sep;
+    for (size_t j = 0; j < RhsSize(); ++j) {
+      ss << HasEdge(i, j);
+    }
+    sep = ";";
+  }
+  return ss.str();
+}
+
+void UnorderedElementsAreMatcherImplBase::DescribeToImpl(
+    ::std::ostream* os) const {
+  switch (match_flags()) {
+    case UnorderedMatcherRequire::ExactMatch:
+      if (matcher_describers_.empty()) {
+        *os << "is empty";
+        return;
+      }
+      if (matcher_describers_.size() == 1) {
+        *os << "has " << Elements(1) << " and that element ";
+        matcher_describers_[0]->DescribeTo(os);
+        return;
+      }
+      *os << "has " << Elements(matcher_describers_.size())
+          << " and there exists some permutation of elements such that:\n";
+      break;
+    case UnorderedMatcherRequire::Superset:
+      *os << "a surjection from elements to requirements exists such that:\n";
+      break;
+    case UnorderedMatcherRequire::Subset:
+      *os << "an injection from elements to requirements exists such that:\n";
+      break;
+  }
+
+  const char* sep = "";
+  for (size_t i = 0; i != matcher_describers_.size(); ++i) {
+    *os << sep;
+    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
+      *os << " - element #" << i << " ";
+    } else {
+      *os << " - an element ";
+    }
+    matcher_describers_[i]->DescribeTo(os);
+    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
+      sep = ", and\n";
+    } else {
+      sep = "\n";
+    }
+  }
+}
+
+void UnorderedElementsAreMatcherImplBase::DescribeNegationToImpl(
+    ::std::ostream* os) const {
+  switch (match_flags()) {
+    case UnorderedMatcherRequire::ExactMatch:
+      if (matcher_describers_.empty()) {
+        *os << "isn't empty";
+        return;
+      }
+      if (matcher_describers_.size() == 1) {
+        *os << "doesn't have " << Elements(1) << ", or has " << Elements(1)
+            << " that ";
+        matcher_describers_[0]->DescribeNegationTo(os);
+        return;
+      }
+      *os << "doesn't have " << Elements(matcher_describers_.size())
+          << ", or there exists no permutation of elements such that:\n";
+      break;
+    case UnorderedMatcherRequire::Superset:
+      *os << "no surjection from elements to requirements exists such that:\n";
+      break;
+    case UnorderedMatcherRequire::Subset:
+      *os << "no injection from elements to requirements exists such that:\n";
+      break;
+  }
+  const char* sep = "";
+  for (size_t i = 0; i != matcher_describers_.size(); ++i) {
+    *os << sep;
+    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
+      *os << " - element #" << i << " ";
+    } else {
+      *os << " - an element ";
+    }
+    matcher_describers_[i]->DescribeTo(os);
+    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
+      sep = ", and\n";
+    } else {
+      sep = "\n";
+    }
+  }
+}
+
+// Checks that all matchers match at least one element, and that all
+// elements match at least one matcher. This enables faster matching
+// and better error reporting.
+// Returns false, writing an explanation to 'listener', if and only
+// if the success criteria are not met.
+bool UnorderedElementsAreMatcherImplBase::VerifyMatchMatrix(
+    const ::std::vector<std::string>& element_printouts,
+    const MatchMatrix& matrix, MatchResultListener* listener) const {
+  bool result = true;
+  ::std::vector<char> element_matched(matrix.LhsSize(), 0);
+  ::std::vector<char> matcher_matched(matrix.RhsSize(), 0);
+
+  for (size_t ilhs = 0; ilhs < matrix.LhsSize(); ilhs++) {
+    for (size_t irhs = 0; irhs < matrix.RhsSize(); irhs++) {
+      char matched = matrix.HasEdge(ilhs, irhs);
+      element_matched[ilhs] |= matched;
+      matcher_matched[irhs] |= matched;
+    }
+  }
+
+  if (match_flags() & UnorderedMatcherRequire::Superset) {
+    const char* sep =
+        "where the following matchers don't match any elements:\n";
+    for (size_t mi = 0; mi < matcher_matched.size(); ++mi) {
+      if (matcher_matched[mi]) continue;
+      result = false;
+      if (listener->IsInterested()) {
+        *listener << sep << "matcher #" << mi << ": ";
+        matcher_describers_[mi]->DescribeTo(listener->stream());
+        sep = ",\n";
+      }
+    }
+  }
+
+  if (match_flags() & UnorderedMatcherRequire::Subset) {
+    const char* sep =
+        "where the following elements don't match any matchers:\n";
+    const char* outer_sep = "";
+    if (!result) {
+      outer_sep = "\nand ";
+    }
+    for (size_t ei = 0; ei < element_matched.size(); ++ei) {
+      if (element_matched[ei]) continue;
+      result = false;
+      if (listener->IsInterested()) {
+        *listener << outer_sep << sep << "element #" << ei << ": "
+                  << element_printouts[ei];
+        sep = ",\n";
+        outer_sep = "";
+      }
+    }
+  }
+  return result;
+}
+
+bool UnorderedElementsAreMatcherImplBase::FindPairing(
+    const MatchMatrix& matrix, MatchResultListener* listener) const {
+  ElementMatcherPairs matches = FindMaxBipartiteMatching(matrix);
+
+  size_t max_flow = matches.size();
+  if ((match_flags() & UnorderedMatcherRequire::Superset) &&
+      max_flow < matrix.RhsSize()) {
+    if (listener->IsInterested()) {
+      *listener << "where no permutation of the elements can satisfy all "
+                   "matchers, and the closest match is "
+                << max_flow << " of " << matrix.RhsSize()
+                << " matchers with the pairings:\n";
+      LogElementMatcherPairVec(matches, listener->stream());
+    }
+    return false;
+  }
+  if ((match_flags() & UnorderedMatcherRequire::Subset) &&
+      max_flow < matrix.LhsSize()) {
+    if (listener->IsInterested()) {
+      *listener
+          << "where not all elements can be matched, and the closest match is "
+          << max_flow << " of " << matrix.RhsSize()
+          << " matchers with the pairings:\n";
+      LogElementMatcherPairVec(matches, listener->stream());
+    }
+    return false;
+  }
+
+  if (matches.size() > 1) {
+    if (listener->IsInterested()) {
+      const char* sep = "where:\n";
+      for (size_t mi = 0; mi < matches.size(); ++mi) {
+        *listener << sep << " - element #" << matches[mi].first
+                  << " is matched by matcher #" << matches[mi].second;
+        sep = ",\n";
+      }
+    }
+  }
+  return true;
+}
+
+}  // namespace internal
+}  // namespace testing
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// This file implements the spec builder syntax (ON_CALL and
+// EXPECT_CALL).
+
+
+#include <stdlib.h>
+
+#include <iostream>  // NOLINT
+#include <map>
+#include <memory>
+#include <set>
+#include <string>
+#include <vector>
+
+
+#if GTEST_OS_CYGWIN || GTEST_OS_LINUX || GTEST_OS_MAC
+# include <unistd.h>  // NOLINT
+#endif
+
+// Silence C4800 (C4800: 'int *const ': forcing value
+// to bool 'true' or 'false') for MSVC 15
+#ifdef _MSC_VER
+#if _MSC_VER == 1900
+#  pragma warning(push)
+#  pragma warning(disable:4800)
+#endif
+#endif
+
+namespace testing {
+namespace internal {
+
+// Protects the mock object registry (in class Mock), all function
+// mockers, and all expectations.
+GTEST_API_ GTEST_DEFINE_STATIC_MUTEX_(g_gmock_mutex);
+
+// Logs a message including file and line number information.
+GTEST_API_ void LogWithLocation(testing::internal::LogSeverity severity,
+                                const char* file, int line,
+                                const std::string& message) {
+  ::std::ostringstream s;
+  s << internal::FormatFileLocation(file, line) << " " << message
+    << ::std::endl;
+  Log(severity, s.str(), 0);
+}
+
+// Constructs an ExpectationBase object.
+ExpectationBase::ExpectationBase(const char* a_file, int a_line,
+                                 const std::string& a_source_text)
+    : file_(a_file),
+      line_(a_line),
+      source_text_(a_source_text),
+      cardinality_specified_(false),
+      cardinality_(Exactly(1)),
+      call_count_(0),
+      retired_(false),
+      extra_matcher_specified_(false),
+      repeated_action_specified_(false),
+      retires_on_saturation_(false),
+      last_clause_(kNone),
+      action_count_checked_(false) {}
+
+// Destructs an ExpectationBase object.
+ExpectationBase::~ExpectationBase() {}
+
+// Explicitly specifies the cardinality of this expectation.  Used by
+// the subclasses to implement the .Times() clause.
+void ExpectationBase::SpecifyCardinality(const Cardinality& a_cardinality) {
+  cardinality_specified_ = true;
+  cardinality_ = a_cardinality;
+}
+
+// Retires all pre-requisites of this expectation.
+void ExpectationBase::RetireAllPreRequisites()
+    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+  if (is_retired()) {
+    // We can take this short-cut as we never retire an expectation
+    // until we have retired all its pre-requisites.
+    return;
+  }
+
+  ::std::vector<ExpectationBase*> expectations(1, this);
+  while (!expectations.empty()) {
+    ExpectationBase* exp = expectations.back();
+    expectations.pop_back();
+
+    for (ExpectationSet::const_iterator it =
+             exp->immediate_prerequisites_.begin();
+         it != exp->immediate_prerequisites_.end(); ++it) {
+      ExpectationBase* next = it->expectation_base().get();
+      if (!next->is_retired()) {
+        next->Retire();
+        expectations.push_back(next);
+      }
+    }
+  }
+}
+
+// Returns true if and only if all pre-requisites of this expectation
+// have been satisfied.
+bool ExpectationBase::AllPrerequisitesAreSatisfied() const
+    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+  g_gmock_mutex.AssertHeld();
+  ::std::vector<const ExpectationBase*> expectations(1, this);
+  while (!expectations.empty()) {
+    const ExpectationBase* exp = expectations.back();
+    expectations.pop_back();
+
+    for (ExpectationSet::const_iterator it =
+             exp->immediate_prerequisites_.begin();
+         it != exp->immediate_prerequisites_.end(); ++it) {
+      const ExpectationBase* next = it->expectation_base().get();
+      if (!next->IsSatisfied()) return false;
+      expectations.push_back(next);
+    }
+  }
+  return true;
+}
+
+// Adds unsatisfied pre-requisites of this expectation to 'result'.
+void ExpectationBase::FindUnsatisfiedPrerequisites(ExpectationSet* result) const
+    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+  g_gmock_mutex.AssertHeld();
+  ::std::vector<const ExpectationBase*> expectations(1, this);
+  while (!expectations.empty()) {
+    const ExpectationBase* exp = expectations.back();
+    expectations.pop_back();
+
+    for (ExpectationSet::const_iterator it =
+             exp->immediate_prerequisites_.begin();
+         it != exp->immediate_prerequisites_.end(); ++it) {
+      const ExpectationBase* next = it->expectation_base().get();
+
+      if (next->IsSatisfied()) {
+        // If *it is satisfied and has a call count of 0, some of its
+        // pre-requisites may not be satisfied yet.
+        if (next->call_count_ == 0) {
+          expectations.push_back(next);
+        }
+      } else {
+        // Now that we know next is unsatisfied, we are not so interested
+        // in whether its pre-requisites are satisfied.  Therefore we
+        // don't iterate into it here.
+        *result += *it;
+      }
+    }
+  }
+}
+
+// Describes how many times a function call matching this
+// expectation has occurred.
+void ExpectationBase::DescribeCallCountTo(::std::ostream* os) const
+    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+  g_gmock_mutex.AssertHeld();
+
+  // Describes how many times the function is expected to be called.
+  *os << "         Expected: to be ";
+  cardinality().DescribeTo(os);
+  *os << "\n           Actual: ";
+  Cardinality::DescribeActualCallCountTo(call_count(), os);
+
+  // Describes the state of the expectation (e.g. is it satisfied?
+  // is it active?).
+  *os << " - " << (IsOverSaturated() ? "over-saturated" :
+                   IsSaturated() ? "saturated" :
+                   IsSatisfied() ? "satisfied" : "unsatisfied")
+      << " and "
+      << (is_retired() ? "retired" : "active");
+}
+
+// Checks the action count (i.e. the number of WillOnce() and
+// WillRepeatedly() clauses) against the cardinality if this hasn't
+// been done before.  Prints a warning if there are too many or too
+// few actions.
+void ExpectationBase::CheckActionCountIfNotDone() const
+    GTEST_LOCK_EXCLUDED_(mutex_) {
+  bool should_check = false;
+  {
+    MutexLock l(&mutex_);
+    if (!action_count_checked_) {
+      action_count_checked_ = true;
+      should_check = true;
+    }
+  }
+
+  if (should_check) {
+    if (!cardinality_specified_) {
+      // The cardinality was inferred - no need to check the action
+      // count against it.
+      return;
+    }
+
+    // The cardinality was explicitly specified.
+    const int action_count = static_cast<int>(untyped_actions_.size());
+    const int upper_bound = cardinality().ConservativeUpperBound();
+    const int lower_bound = cardinality().ConservativeLowerBound();
+    bool too_many;  // True if there are too many actions, or false
+    // if there are too few.
+    if (action_count > upper_bound ||
+        (action_count == upper_bound && repeated_action_specified_)) {
+      too_many = true;
+    } else if (0 < action_count && action_count < lower_bound &&
+               !repeated_action_specified_) {
+      too_many = false;
+    } else {
+      return;
+    }
+
+    ::std::stringstream ss;
+    DescribeLocationTo(&ss);
+    ss << "Too " << (too_many ? "many" : "few")
+       << " actions specified in " << source_text() << "...\n"
+       << "Expected to be ";
+    cardinality().DescribeTo(&ss);
+    ss << ", but has " << (too_many ? "" : "only ")
+       << action_count << " WillOnce()"
+       << (action_count == 1 ? "" : "s");
+    if (repeated_action_specified_) {
+      ss << " and a WillRepeatedly()";
+    }
+    ss << ".";
+    Log(kWarning, ss.str(), -1);  // -1 means "don't print stack trace".
+  }
+}
+
+// Implements the .Times() clause.
+void ExpectationBase::UntypedTimes(const Cardinality& a_cardinality) {
+  if (last_clause_ == kTimes) {
+    ExpectSpecProperty(false,
+                       ".Times() cannot appear "
+                       "more than once in an EXPECT_CALL().");
+  } else {
+    ExpectSpecProperty(last_clause_ < kTimes,
+                       ".Times() cannot appear after "
+                       ".InSequence(), .WillOnce(), .WillRepeatedly(), "
+                       "or .RetiresOnSaturation().");
+  }
+  last_clause_ = kTimes;
+
+  SpecifyCardinality(a_cardinality);
+}
+
+// Points to the implicit sequence introduced by a living InSequence
+// object (if any) in the current thread or NULL.
+GTEST_API_ ThreadLocal<Sequence*> g_gmock_implicit_sequence;
+
+// Reports an uninteresting call (whose description is in msg) in the
+// manner specified by 'reaction'.
+void ReportUninterestingCall(CallReaction reaction, const std::string& msg) {
+  // Include a stack trace only if --gmock_verbose=info is specified.
+  const int stack_frames_to_skip =
+      GMOCK_FLAG(verbose) == kInfoVerbosity ? 3 : -1;
+  switch (reaction) {
+    case kAllow:
+      Log(kInfo, msg, stack_frames_to_skip);
+      break;
+    case kWarn:
+      Log(kWarning,
+          msg +
+              "\nNOTE: You can safely ignore the above warning unless this "
+              "call should not happen.  Do not suppress it by blindly adding "
+              "an EXPECT_CALL() if you don't mean to enforce the call.  "
+              "See "
+              "https://github.com/google/googletest/blob/master/docs/"
+              "gmock_cook_book.md#"
+              "knowing-when-to-expect for details.\n",
+          stack_frames_to_skip);
+      break;
+    default:  // FAIL
+      Expect(false, nullptr, -1, msg);
+  }
+}
+
+UntypedFunctionMockerBase::UntypedFunctionMockerBase()
+    : mock_obj_(nullptr), name_("") {}
+
+UntypedFunctionMockerBase::~UntypedFunctionMockerBase() {}
+
+// Sets the mock object this mock method belongs to, and registers
+// this information in the global mock registry.  Will be called
+// whenever an EXPECT_CALL() or ON_CALL() is executed on this mock
+// method.
+void UntypedFunctionMockerBase::RegisterOwner(const void* mock_obj)
+    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
+  {
+    MutexLock l(&g_gmock_mutex);
+    mock_obj_ = mock_obj;
+  }
+  Mock::Register(mock_obj, this);
+}
+
+// Sets the mock object this mock method belongs to, and sets the name
+// of the mock function.  Will be called upon each invocation of this
+// mock function.
+void UntypedFunctionMockerBase::SetOwnerAndName(const void* mock_obj,
+                                                const char* name)
+    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
+  // We protect name_ under g_gmock_mutex in case this mock function
+  // is called from two threads concurrently.
+  MutexLock l(&g_gmock_mutex);
+  mock_obj_ = mock_obj;
+  name_ = name;
+}
+
+// Returns the name of the function being mocked.  Must be called
+// after RegisterOwner() or SetOwnerAndName() has been called.
+const void* UntypedFunctionMockerBase::MockObject() const
+    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
+  const void* mock_obj;
+  {
+    // We protect mock_obj_ under g_gmock_mutex in case this mock
+    // function is called from two threads concurrently.
+    MutexLock l(&g_gmock_mutex);
+    Assert(mock_obj_ != nullptr, __FILE__, __LINE__,
+           "MockObject() must not be called before RegisterOwner() or "
+           "SetOwnerAndName() has been called.");
+    mock_obj = mock_obj_;
+  }
+  return mock_obj;
+}
+
+// Returns the name of this mock method.  Must be called after
+// SetOwnerAndName() has been called.
+const char* UntypedFunctionMockerBase::Name() const
+    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
+  const char* name;
+  {
+    // We protect name_ under g_gmock_mutex in case this mock
+    // function is called from two threads concurrently.
+    MutexLock l(&g_gmock_mutex);
+    Assert(name_ != nullptr, __FILE__, __LINE__,
+           "Name() must not be called before SetOwnerAndName() has "
+           "been called.");
+    name = name_;
+  }
+  return name;
+}
+
+// Calculates the result of invoking this mock function with the given
+// arguments, prints it, and returns it.  The caller is responsible
+// for deleting the result.
+UntypedActionResultHolderBase* UntypedFunctionMockerBase::UntypedInvokeWith(
+    void* const untyped_args) GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
+  // See the definition of untyped_expectations_ for why access to it
+  // is unprotected here.
+  if (untyped_expectations_.size() == 0) {
+    // No expectation is set on this mock method - we have an
+    // uninteresting call.
+
+    // We must get Google Mock's reaction on uninteresting calls
+    // made on this mock object BEFORE performing the action,
+    // because the action may DELETE the mock object and make the
+    // following expression meaningless.
+    const CallReaction reaction =
+        Mock::GetReactionOnUninterestingCalls(MockObject());
+
+    // True if and only if we need to print this call's arguments and return
+    // value.  This definition must be kept in sync with
+    // the behavior of ReportUninterestingCall().
+    const bool need_to_report_uninteresting_call =
+        // If the user allows this uninteresting call, we print it
+        // only when they want informational messages.
+        reaction == kAllow ? LogIsVisible(kInfo) :
+                           // If the user wants this to be a warning, we print
+                           // it only when they want to see warnings.
+            reaction == kWarn
+                ? LogIsVisible(kWarning)
+                :
+                // Otherwise, the user wants this to be an error, and we
+                // should always print detailed information in the error.
+                true;
+
+    if (!need_to_report_uninteresting_call) {
+      // Perform the action without printing the call information.
+      return this->UntypedPerformDefaultAction(
+          untyped_args, "Function call: " + std::string(Name()));
+    }
+
+    // Warns about the uninteresting call.
+    ::std::stringstream ss;
+    this->UntypedDescribeUninterestingCall(untyped_args, &ss);
+
+    // Calculates the function result.
+    UntypedActionResultHolderBase* const result =
+        this->UntypedPerformDefaultAction(untyped_args, ss.str());
+
+    // Prints the function result.
+    if (result != nullptr) result->PrintAsActionResult(&ss);
+
+    ReportUninterestingCall(reaction, ss.str());
+    return result;
+  }
+
+  bool is_excessive = false;
+  ::std::stringstream ss;
+  ::std::stringstream why;
+  ::std::stringstream loc;
+  const void* untyped_action = nullptr;
+
+  // The UntypedFindMatchingExpectation() function acquires and
+  // releases g_gmock_mutex.
+
+  const ExpectationBase* const untyped_expectation =
+      this->UntypedFindMatchingExpectation(untyped_args, &untyped_action,
+                                           &is_excessive, &ss, &why);
+  const bool found = untyped_expectation != nullptr;
+
+  // True if and only if we need to print the call's arguments
+  // and return value.
+  // This definition must be kept in sync with the uses of Expect()
+  // and Log() in this function.
+  const bool need_to_report_call =
+      !found || is_excessive || LogIsVisible(kInfo);
+  if (!need_to_report_call) {
+    // Perform the action without printing the call information.
+    return untyped_action == nullptr
+               ? this->UntypedPerformDefaultAction(untyped_args, "")
+               : this->UntypedPerformAction(untyped_action, untyped_args);
+  }
+
+  ss << "    Function call: " << Name();
+  this->UntypedPrintArgs(untyped_args, &ss);
+
+  // In case the action deletes a piece of the expectation, we
+  // generate the message beforehand.
+  if (found && !is_excessive) {
+    untyped_expectation->DescribeLocationTo(&loc);
+  }
+
+  UntypedActionResultHolderBase* result = nullptr;
+
+  auto perform_action = [&] {
+    return untyped_action == nullptr
+               ? this->UntypedPerformDefaultAction(untyped_args, ss.str())
+               : this->UntypedPerformAction(untyped_action, untyped_args);
+  };
+  auto handle_failures = [&] {
+    ss << "\n" << why.str();
+
+    if (!found) {
+      // No expectation matches this call - reports a failure.
+      Expect(false, nullptr, -1, ss.str());
+    } else if (is_excessive) {
+      // We had an upper-bound violation and the failure message is in ss.
+      Expect(false, untyped_expectation->file(), untyped_expectation->line(),
+             ss.str());
+    } else {
+      // We had an expected call and the matching expectation is
+      // described in ss.
+      Log(kInfo, loc.str() + ss.str(), 2);
+    }
+  };
+#if GTEST_HAS_EXCEPTIONS
+  try {
+    result = perform_action();
+  } catch (...) {
+    handle_failures();
+    throw;
+  }
+#else
+  result = perform_action();
+#endif
+
+  if (result != nullptr) result->PrintAsActionResult(&ss);
+  handle_failures();
+  return result;
+}
+
+// Returns an Expectation object that references and co-owns exp,
+// which must be an expectation on this mock function.
+Expectation UntypedFunctionMockerBase::GetHandleOf(ExpectationBase* exp) {
+  // See the definition of untyped_expectations_ for why access to it
+  // is unprotected here.
+  for (UntypedExpectations::const_iterator it =
+           untyped_expectations_.begin();
+       it != untyped_expectations_.end(); ++it) {
+    if (it->get() == exp) {
+      return Expectation(*it);
+    }
+  }
+
+  Assert(false, __FILE__, __LINE__, "Cannot find expectation.");
+  return Expectation();
+  // The above statement is just to make the code compile, and will
+  // never be executed.
+}
+
+// Verifies that all expectations on this mock function have been
+// satisfied.  Reports one or more Google Test non-fatal failures
+// and returns false if not.
+bool UntypedFunctionMockerBase::VerifyAndClearExpectationsLocked()
+    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+  g_gmock_mutex.AssertHeld();
+  bool expectations_met = true;
+  for (UntypedExpectations::const_iterator it =
+           untyped_expectations_.begin();
+       it != untyped_expectations_.end(); ++it) {
+    ExpectationBase* const untyped_expectation = it->get();
+    if (untyped_expectation->IsOverSaturated()) {
+      // There was an upper-bound violation.  Since the error was
+      // already reported when it occurred, there is no need to do
+      // anything here.
+      expectations_met = false;
+    } else if (!untyped_expectation->IsSatisfied()) {
+      expectations_met = false;
+      ::std::stringstream ss;
+      ss  << "Actual function call count doesn't match "
+          << untyped_expectation->source_text() << "...\n";
+      // No need to show the source file location of the expectation
+      // in the description, as the Expect() call that follows already
+      // takes care of it.
+      untyped_expectation->MaybeDescribeExtraMatcherTo(&ss);
+      untyped_expectation->DescribeCallCountTo(&ss);
+      Expect(false, untyped_expectation->file(),
+             untyped_expectation->line(), ss.str());
+    }
+  }
+
+  // Deleting our expectations may trigger other mock objects to be deleted, for
+  // example if an action contains a reference counted smart pointer to that
+  // mock object, and that is the last reference. So if we delete our
+  // expectations within the context of the global mutex we may deadlock when
+  // this method is called again. Instead, make a copy of the set of
+  // expectations to delete, clear our set within the mutex, and then clear the
+  // copied set outside of it.
+  UntypedExpectations expectations_to_delete;
+  untyped_expectations_.swap(expectations_to_delete);
+
+  g_gmock_mutex.Unlock();
+  expectations_to_delete.clear();
+  g_gmock_mutex.Lock();
+
+  return expectations_met;
+}
+
+CallReaction intToCallReaction(int mock_behavior) {
+  if (mock_behavior >= kAllow && mock_behavior <= kFail) {
+    return static_cast<internal::CallReaction>(mock_behavior);
+  }
+  return kWarn;
+}
+
+}  // namespace internal
+
+// Class Mock.
+
+namespace {
+
+typedef std::set<internal::UntypedFunctionMockerBase*> FunctionMockers;
+
+// The current state of a mock object.  Such information is needed for
+// detecting leaked mock objects and explicitly verifying a mock's
+// expectations.
+struct MockObjectState {
+  MockObjectState()
+      : first_used_file(nullptr), first_used_line(-1), leakable(false) {}
+
+  // Where in the source file an ON_CALL or EXPECT_CALL is first
+  // invoked on this mock object.
+  const char* first_used_file;
+  int first_used_line;
+  ::std::string first_used_test_suite;
+  ::std::string first_used_test;
+  bool leakable;  // true if and only if it's OK to leak the object.
+  FunctionMockers function_mockers;  // All registered methods of the object.
+};
+
+// A global registry holding the state of all mock objects that are
+// alive.  A mock object is added to this registry the first time
+// Mock::AllowLeak(), ON_CALL(), or EXPECT_CALL() is called on it.  It
+// is removed from the registry in the mock object's destructor.
+class MockObjectRegistry {
+ public:
+  // Maps a mock object (identified by its address) to its state.
+  typedef std::map<const void*, MockObjectState> StateMap;
+
+  // This destructor will be called when a program exits, after all
+  // tests in it have been run.  By then, there should be no mock
+  // object alive.  Therefore we report any living object as test
+  // failure, unless the user explicitly asked us to ignore it.
+  ~MockObjectRegistry() {
+    if (!GMOCK_FLAG(catch_leaked_mocks))
+      return;
+
+    int leaked_count = 0;
+    for (StateMap::const_iterator it = states_.begin(); it != states_.end();
+         ++it) {
+      if (it->second.leakable)  // The user said it's fine to leak this object.
+        continue;
+
+      // FIXME: Print the type of the leaked object.
+      // This can help the user identify the leaked object.
+      std::cout << "\n";
+      const MockObjectState& state = it->second;
+      std::cout << internal::FormatFileLocation(state.first_used_file,
+                                                state.first_used_line);
+      std::cout << " ERROR: this mock object";
+      if (state.first_used_test != "") {
+        std::cout << " (used in test " << state.first_used_test_suite << "."
+                  << state.first_used_test << ")";
+      }
+      std::cout << " should be deleted but never is. Its address is @"
+           << it->first << ".";
+      leaked_count++;
+    }
+    if (leaked_count > 0) {
+      std::cout << "\nERROR: " << leaked_count << " leaked mock "
+                << (leaked_count == 1 ? "object" : "objects")
+                << " found at program exit. Expectations on a mock object are "
+                   "verified when the object is destructed. Leaking a mock "
+                   "means that its expectations aren't verified, which is "
+                   "usually a test bug. If you really intend to leak a mock, "
+                   "you can suppress this error using "
+                   "testing::Mock::AllowLeak(mock_object), or you may use a "
+                   "fake or stub instead of a mock.\n";
+      std::cout.flush();
+      ::std::cerr.flush();
+      // RUN_ALL_TESTS() has already returned when this destructor is
+      // called.  Therefore we cannot use the normal Google Test
+      // failure reporting mechanism.
+      _exit(1);  // We cannot call exit() as it is not reentrant and
+                 // may already have been called.
+    }
+  }
+
+  StateMap& states() { return states_; }
+
+ private:
+  StateMap states_;
+};
+
+// Protected by g_gmock_mutex.
+MockObjectRegistry g_mock_object_registry;
+
+// Maps a mock object to the reaction Google Mock should have when an
+// uninteresting method is called.  Protected by g_gmock_mutex.
+std::map<const void*, internal::CallReaction> g_uninteresting_call_reaction;
+
+// Sets the reaction Google Mock should have when an uninteresting
+// method of the given mock object is called.
+void SetReactionOnUninterestingCalls(const void* mock_obj,
+                                     internal::CallReaction reaction)
+    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  g_uninteresting_call_reaction[mock_obj] = reaction;
+}
+
+}  // namespace
+
+// Tells Google Mock to allow uninteresting calls on the given mock
+// object.
+void Mock::AllowUninterestingCalls(const void* mock_obj)
+    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  SetReactionOnUninterestingCalls(mock_obj, internal::kAllow);
+}
+
+// Tells Google Mock to warn the user about uninteresting calls on the
+// given mock object.
+void Mock::WarnUninterestingCalls(const void* mock_obj)
+    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  SetReactionOnUninterestingCalls(mock_obj, internal::kWarn);
+}
+
+// Tells Google Mock to fail uninteresting calls on the given mock
+// object.
+void Mock::FailUninterestingCalls(const void* mock_obj)
+    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  SetReactionOnUninterestingCalls(mock_obj, internal::kFail);
+}
+
+// Tells Google Mock the given mock object is being destroyed and its
+// entry in the call-reaction table should be removed.
+void Mock::UnregisterCallReaction(const void* mock_obj)
+    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  g_uninteresting_call_reaction.erase(mock_obj);
+}
+
+// Returns the reaction Google Mock will have on uninteresting calls
+// made on the given mock object.
+internal::CallReaction Mock::GetReactionOnUninterestingCalls(
+    const void* mock_obj)
+        GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  return (g_uninteresting_call_reaction.count(mock_obj) == 0) ?
+      internal::intToCallReaction(GMOCK_FLAG(default_mock_behavior)) :
+      g_uninteresting_call_reaction[mock_obj];
+}
+
+// Tells Google Mock to ignore mock_obj when checking for leaked mock
+// objects.
+void Mock::AllowLeak(const void* mock_obj)
+    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  g_mock_object_registry.states()[mock_obj].leakable = true;
+}
+
+// Verifies and clears all expectations on the given mock object.  If
+// the expectations aren't satisfied, generates one or more Google
+// Test non-fatal failures and returns false.
+bool Mock::VerifyAndClearExpectations(void* mock_obj)
+    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  return VerifyAndClearExpectationsLocked(mock_obj);
+}
+
+// Verifies all expectations on the given mock object and clears its
+// default actions and expectations.  Returns true if and only if the
+// verification was successful.
+bool Mock::VerifyAndClear(void* mock_obj)
+    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  ClearDefaultActionsLocked(mock_obj);
+  return VerifyAndClearExpectationsLocked(mock_obj);
+}
+
+// Verifies and clears all expectations on the given mock object.  If
+// the expectations aren't satisfied, generates one or more Google
+// Test non-fatal failures and returns false.
+bool Mock::VerifyAndClearExpectationsLocked(void* mock_obj)
+    GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
+  internal::g_gmock_mutex.AssertHeld();
+  if (g_mock_object_registry.states().count(mock_obj) == 0) {
+    // No EXPECT_CALL() was set on the given mock object.
+    return true;
+  }
+
+  // Verifies and clears the expectations on each mock method in the
+  // given mock object.
+  bool expectations_met = true;
+  FunctionMockers& mockers =
+      g_mock_object_registry.states()[mock_obj].function_mockers;
+  for (FunctionMockers::const_iterator it = mockers.begin();
+       it != mockers.end(); ++it) {
+    if (!(*it)->VerifyAndClearExpectationsLocked()) {
+      expectations_met = false;
+    }
+  }
+
+  // We don't clear the content of mockers, as they may still be
+  // needed by ClearDefaultActionsLocked().
+  return expectations_met;
+}
+
+bool Mock::IsNaggy(void* mock_obj)
+    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  return Mock::GetReactionOnUninterestingCalls(mock_obj) == internal::kWarn;
+}
+bool Mock::IsNice(void* mock_obj)
+    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  return Mock::GetReactionOnUninterestingCalls(mock_obj) == internal::kAllow;
+}
+bool Mock::IsStrict(void* mock_obj)
+    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  return Mock::GetReactionOnUninterestingCalls(mock_obj) == internal::kFail;
+}
+
+// Registers a mock object and a mock method it owns.
+void Mock::Register(const void* mock_obj,
+                    internal::UntypedFunctionMockerBase* mocker)
+    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  g_mock_object_registry.states()[mock_obj].function_mockers.insert(mocker);
+}
+
+// Tells Google Mock where in the source code mock_obj is used in an
+// ON_CALL or EXPECT_CALL.  In case mock_obj is leaked, this
+// information helps the user identify which object it is.
+void Mock::RegisterUseByOnCallOrExpectCall(const void* mock_obj,
+                                           const char* file, int line)
+    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
+  internal::MutexLock l(&internal::g_gmock_mutex);
+  MockObjectState& state = g_mock_object_registry.states()[mock_obj];
+  if (state.first_used_file == nullptr) {
+    state.first_used_file = file;
+    state.first_used_line = line;
+    const TestInfo* const test_info =
+        UnitTest::GetInstance()->current_test_info();
+    if (test_info != nullptr) {
+      state.first_used_test_suite = test_info->test_suite_name();
+      state.first_used_test = test_info->name();
+    }
+  }
+}
+
+// Unregisters a mock method; removes the owning mock object from the
+// registry when the last mock method associated with it has been
+// unregistered.  This is called only in the destructor of
+// FunctionMockerBase.
+void Mock::UnregisterLocked(internal::UntypedFunctionMockerBase* mocker)
+    GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
+  internal::g_gmock_mutex.AssertHeld();
+  for (MockObjectRegistry::StateMap::iterator it =
+           g_mock_object_registry.states().begin();
+       it != g_mock_object_registry.states().end(); ++it) {
+    FunctionMockers& mockers = it->second.function_mockers;
+    if (mockers.erase(mocker) > 0) {
+      // mocker was in mockers and has been just removed.
+      if (mockers.empty()) {
+        g_mock_object_registry.states().erase(it);
+      }
+      return;
+    }
+  }
+}
+
+// Clears all ON_CALL()s set on the given mock object.
+void Mock::ClearDefaultActionsLocked(void* mock_obj)
+    GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
+  internal::g_gmock_mutex.AssertHeld();
+
+  if (g_mock_object_registry.states().count(mock_obj) == 0) {
+    // No ON_CALL() was set on the given mock object.
+    return;
+  }
+
+  // Clears the default actions for each mock method in the given mock
+  // object.
+  FunctionMockers& mockers =
+      g_mock_object_registry.states()[mock_obj].function_mockers;
+  for (FunctionMockers::const_iterator it = mockers.begin();
+       it != mockers.end(); ++it) {
+    (*it)->ClearDefaultActionsLocked();
+  }
+
+  // We don't clear the content of mockers, as they may still be
+  // needed by VerifyAndClearExpectationsLocked().
+}
+
+Expectation::Expectation() {}
+
+Expectation::Expectation(
+    const std::shared_ptr<internal::ExpectationBase>& an_expectation_base)
+    : expectation_base_(an_expectation_base) {}
+
+Expectation::~Expectation() {}
+
+// Adds an expectation to a sequence.
+void Sequence::AddExpectation(const Expectation& expectation) const {
+  if (*last_expectation_ != expectation) {
+    if (last_expectation_->expectation_base() != nullptr) {
+      expectation.expectation_base()->immediate_prerequisites_
+          += *last_expectation_;
+    }
+    *last_expectation_ = expectation;
+  }
+}
+
+// Creates the implicit sequence if there isn't one.
+InSequence::InSequence() {
+  if (internal::g_gmock_implicit_sequence.get() == nullptr) {
+    internal::g_gmock_implicit_sequence.set(new Sequence);
+    sequence_created_ = true;
+  } else {
+    sequence_created_ = false;
+  }
+}
+
+// Deletes the implicit sequence if it was created by the constructor
+// of this object.
+InSequence::~InSequence() {
+  if (sequence_created_) {
+    delete internal::g_gmock_implicit_sequence.get();
+    internal::g_gmock_implicit_sequence.set(nullptr);
+  }
+}
+
+}  // namespace testing
+
+#ifdef _MSC_VER
+#if _MSC_VER == 1900
+#  pragma warning(pop)
+#endif
+#endif
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+
+namespace testing {
+
+GMOCK_DEFINE_bool_(catch_leaked_mocks, true,
+                   "true if and only if Google Mock should report leaked "
+                   "mock objects as failures.");
+
+GMOCK_DEFINE_string_(verbose, internal::kWarningVerbosity,
+                     "Controls how verbose Google Mock's output is."
+                     "  Valid values:\n"
+                     "  info    - prints all messages.\n"
+                     "  warning - prints warnings and errors.\n"
+                     "  error   - prints errors only.");
+
+GMOCK_DEFINE_int32_(default_mock_behavior, 1,
+                    "Controls the default behavior of mocks."
+                    "  Valid values:\n"
+                    "  0 - by default, mocks act as NiceMocks.\n"
+                    "  1 - by default, mocks act as NaggyMocks.\n"
+                    "  2 - by default, mocks act as StrictMocks.");
+
+namespace internal {
+
+// Parses a string as a command line flag.  The string should have the
+// format "--gmock_flag=value".  When def_optional is true, the
+// "=value" part can be omitted.
+//
+// Returns the value of the flag, or NULL if the parsing failed.
+static const char* ParseGoogleMockFlagValue(const char* str,
+                                            const char* flag,
+                                            bool def_optional) {
+  // str and flag must not be NULL.
+  if (str == nullptr || flag == nullptr) return nullptr;
+
+  // The flag must start with "--gmock_".
+  const std::string flag_str = std::string("--gmock_") + flag;
+  const size_t flag_len = flag_str.length();
+  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
+
+  // Skips the flag name.
+  const char* flag_end = str + flag_len;
+
+  // When def_optional is true, it's OK to not have a "=value" part.
+  if (def_optional && (flag_end[0] == '\0')) {
+    return flag_end;
+  }
+
+  // If def_optional is true and there are more characters after the
+  // flag name, or if def_optional is false, there must be a '=' after
+  // the flag name.
+  if (flag_end[0] != '=') return nullptr;
+
+  // Returns the string after "=".
+  return flag_end + 1;
+}
+
+// Parses a string for a Google Mock bool flag, in the form of
+// "--gmock_flag=value".
+//
+// On success, stores the value of the flag in *value, and returns
+// true.  On failure, returns false without changing *value.
+static bool ParseGoogleMockBoolFlag(const char* str, const char* flag,
+                                    bool* value) {
+  // Gets the value of the flag as a string.
+  const char* const value_str = ParseGoogleMockFlagValue(str, flag, true);
+
+  // Aborts if the parsing failed.
+  if (value_str == nullptr) return false;
+
+  // Converts the string value to a bool.
+  *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');
+  return true;
+}
+
+// Parses a string for a Google Mock string flag, in the form of
+// "--gmock_flag=value".
+//
+// On success, stores the value of the flag in *value, and returns
+// true.  On failure, returns false without changing *value.
+template <typename String>
+static bool ParseGoogleMockStringFlag(const char* str, const char* flag,
+                                      String* value) {
+  // Gets the value of the flag as a string.
+  const char* const value_str = ParseGoogleMockFlagValue(str, flag, false);
+
+  // Aborts if the parsing failed.
+  if (value_str == nullptr) return false;
+
+  // Sets *value to the value of the flag.
+  *value = value_str;
+  return true;
+}
+
+static bool ParseGoogleMockIntFlag(const char* str, const char* flag,
+                                   int32_t* value) {
+  // Gets the value of the flag as a string.
+  const char* const value_str = ParseGoogleMockFlagValue(str, flag, true);
+
+  // Aborts if the parsing failed.
+  if (value_str == nullptr) return false;
+
+  // Sets *value to the value of the flag.
+  return ParseInt32(Message() << "The value of flag --" << flag,
+                    value_str, value);
+}
+
+// The internal implementation of InitGoogleMock().
+//
+// The type parameter CharType can be instantiated to either char or
+// wchar_t.
+template <typename CharType>
+void InitGoogleMockImpl(int* argc, CharType** argv) {
+  // Makes sure Google Test is initialized.  InitGoogleTest() is
+  // idempotent, so it's fine if the user has already called it.
+  InitGoogleTest(argc, argv);
+  if (*argc <= 0) return;
+
+  for (int i = 1; i != *argc; i++) {
+    const std::string arg_string = StreamableToString(argv[i]);
+    const char* const arg = arg_string.c_str();
+
+    // Do we see a Google Mock flag?
+    if (ParseGoogleMockBoolFlag(arg, "catch_leaked_mocks",
+                                &GMOCK_FLAG(catch_leaked_mocks)) ||
+        ParseGoogleMockStringFlag(arg, "verbose", &GMOCK_FLAG(verbose)) ||
+        ParseGoogleMockIntFlag(arg, "default_mock_behavior",
+                               &GMOCK_FLAG(default_mock_behavior))) {
+      // Yes.  Shift the remainder of the argv list left by one.  Note
+      // that argv has (*argc + 1) elements, the last one always being
+      // NULL.  The following loop moves the trailing NULL element as
+      // well.
+      for (int j = i; j != *argc; j++) {
+        argv[j] = argv[j + 1];
+      }
+
+      // Decrements the argument count.
+      (*argc)--;
+
+      // We also need to decrement the iterator as we just removed
+      // an element.
+      i--;
+    }
+  }
+}
+
+}  // namespace internal
+
+// Initializes Google Mock.  This must be called before running the
+// tests.  In particular, it parses a command line for the flags that
+// Google Mock recognizes.  Whenever a Google Mock flag is seen, it is
+// removed from argv, and *argc is decremented.
+//
+// No value is returned.  Instead, the Google Mock flag variables are
+// updated.
+//
+// Since Google Test is needed for Google Mock to work, this function
+// also initializes Google Test and parses its flags, if that hasn't
+// been done.
+GTEST_API_ void InitGoogleMock(int* argc, char** argv) {
+  internal::InitGoogleMockImpl(argc, argv);
+}
+
+// This overloaded version can be used in Windows programs compiled in
+// UNICODE mode.
+GTEST_API_ void InitGoogleMock(int* argc, wchar_t** argv) {
+  internal::InitGoogleMockImpl(argc, argv);
+}
+
+// This overloaded version can be used on Arduino/embedded platforms where
+// there is no argc/argv.
+GTEST_API_ void InitGoogleMock() {
+  // Since Arduino doesn't have a command line, fake out the argc/argv arguments
+  int argc = 1;
+  const auto arg0 = "dummy";
+  char* argv0 = const_cast<char*>(arg0);
+  char** argv = &argv0;
+
+  internal::InitGoogleMockImpl(&argc, argv);
+}
+
+}  // namespace testing
diff --git a/3rdparty/fmt/test/gtest/gmock/gmock.h b/3rdparty/fmt/test/gtest/gmock/gmock.h
new file mode 100644
index 00000000..d121f7df
--- /dev/null
+++ b/3rdparty/fmt/test/gtest/gmock/gmock.h
@@ -0,0 +1,11645 @@
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// This is the main header file a user should include.
+
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_H_
+
+// This file implements the following syntax:
+//
+//   ON_CALL(mock_object, Method(...))
+//     .With(...) ?
+//     .WillByDefault(...);
+//
+// where With() is optional and WillByDefault() must appear exactly
+// once.
+//
+//   EXPECT_CALL(mock_object, Method(...))
+//     .With(...) ?
+//     .Times(...) ?
+//     .InSequence(...) *
+//     .WillOnce(...) *
+//     .WillRepeatedly(...) ?
+//     .RetiresOnSaturation() ? ;
+//
+// where all clauses are optional and WillOnce() can be repeated.
+
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// The ACTION* family of macros can be used in a namespace scope to
+// define custom actions easily.  The syntax:
+//
+//   ACTION(name) { statements; }
+//
+// will define an action with the given name that executes the
+// statements.  The value returned by the statements will be used as
+// the return value of the action.  Inside the statements, you can
+// refer to the K-th (0-based) argument of the mock function by
+// 'argK', and refer to its type by 'argK_type'.  For example:
+//
+//   ACTION(IncrementArg1) {
+//     arg1_type temp = arg1;
+//     return ++(*temp);
+//   }
+//
+// allows you to write
+//
+//   ...WillOnce(IncrementArg1());
+//
+// You can also refer to the entire argument tuple and its type by
+// 'args' and 'args_type', and refer to the mock function type and its
+// return type by 'function_type' and 'return_type'.
+//
+// Note that you don't need to specify the types of the mock function
+// arguments.  However rest assured that your code is still type-safe:
+// you'll get a compiler error if *arg1 doesn't support the ++
+// operator, or if the type of ++(*arg1) isn't compatible with the
+// mock function's return type, for example.
+//
+// Sometimes you'll want to parameterize the action.   For that you can use
+// another macro:
+//
+//   ACTION_P(name, param_name) { statements; }
+//
+// For example:
+//
+//   ACTION_P(Add, n) { return arg0 + n; }
+//
+// will allow you to write:
+//
+//   ...WillOnce(Add(5));
+//
+// Note that you don't need to provide the type of the parameter
+// either.  If you need to reference the type of a parameter named
+// 'foo', you can write 'foo_type'.  For example, in the body of
+// ACTION_P(Add, n) above, you can write 'n_type' to refer to the type
+// of 'n'.
+//
+// We also provide ACTION_P2, ACTION_P3, ..., up to ACTION_P10 to support
+// multi-parameter actions.
+//
+// For the purpose of typing, you can view
+//
+//   ACTION_Pk(Foo, p1, ..., pk) { ... }
+//
+// as shorthand for
+//
+//   template <typename p1_type, ..., typename pk_type>
+//   FooActionPk<p1_type, ..., pk_type> Foo(p1_type p1, ..., pk_type pk) { ... }
+//
+// In particular, you can provide the template type arguments
+// explicitly when invoking Foo(), as in Foo<long, bool>(5, false);
+// although usually you can rely on the compiler to infer the types
+// for you automatically.  You can assign the result of expression
+// Foo(p1, ..., pk) to a variable of type FooActionPk<p1_type, ...,
+// pk_type>.  This can be useful when composing actions.
+//
+// You can also overload actions with different numbers of parameters:
+//
+//   ACTION_P(Plus, a) { ... }
+//   ACTION_P2(Plus, a, b) { ... }
+//
+// While it's tempting to always use the ACTION* macros when defining
+// a new action, you should also consider implementing ActionInterface
+// or using MakePolymorphicAction() instead, especially if you need to
+// use the action a lot.  While these approaches require more work,
+// they give you more control on the types of the mock function
+// arguments and the action parameters, which in general leads to
+// better compiler error messages that pay off in the long run.  They
+// also allow overloading actions based on parameter types (as opposed
+// to just based on the number of parameters).
+//
+// CAVEAT:
+//
+// ACTION*() can only be used in a namespace scope as templates cannot be
+// declared inside of a local class.
+// Users can, however, define any local functors (e.g. a lambda) that
+// can be used as actions.
+//
+// MORE INFORMATION:
+//
+// To learn more about using these macros, please search for 'ACTION' on
+// https://github.com/google/googletest/blob/master/docs/gmock_cook_book.md
+
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_
+
+#ifndef _WIN32_WCE
+# include <errno.h>
+#endif
+
+#include <algorithm>
+#include <functional>
+#include <memory>
+#include <string>
+#include <tuple>
+#include <type_traits>
+#include <utility>
+
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// This file defines some utilities useful for implementing Google
+// Mock.  They are subject to change without notice, so please DO NOT
+// USE THEM IN USER CODE.
+
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_
+
+#include <stdio.h>
+#include <ostream>  // NOLINT
+#include <string>
+#include <type_traits>
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//
+// Low-level types and utilities for porting Google Mock to various
+// platforms.  All macros ending with _ and symbols defined in an
+// internal namespace are subject to change without notice.  Code
+// outside Google Mock MUST NOT USE THEM DIRECTLY.  Macros that don't
+// end with _ are part of Google Mock's public API and can be used by
+// code outside Google Mock.
+
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PORT_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PORT_H_
+
+#include <assert.h>
+#include <stdlib.h>
+#include <cstdint>
+#include <iostream>
+
+// Most of the utilities needed for porting Google Mock are also
+// required for Google Test and are defined in gtest-port.h.
+//
+// Note to maintainers: to reduce code duplication, prefer adding
+// portability utilities to Google Test's gtest-port.h instead of
+// here, as Google Mock depends on Google Test.  Only add a utility
+// here if it's truly specific to Google Mock.
+
+#include "gtest/gtest.h"
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Injection point for custom user configurations. See README for details
+//
+// ** Custom implementation starts here **
+
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_
+
+// For MS Visual C++, check the compiler version. At least VS 2015 is
+// required to compile Google Mock.
+#if defined(_MSC_VER) && _MSC_VER < 1900
+# error "At least Visual C++ 2015 (14.0) is required to compile Google Mock."
+#endif
+
+// Macro for referencing flags.  This is public as we want the user to
+// use this syntax to reference Google Mock flags.
+#define GMOCK_FLAG(name) FLAGS_gmock_##name
+
+#if !defined(GMOCK_DECLARE_bool_)
+
+// Macros for declaring flags.
+# define GMOCK_DECLARE_bool_(name) extern GTEST_API_ bool GMOCK_FLAG(name)
+# define GMOCK_DECLARE_int32_(name) extern GTEST_API_ int32_t GMOCK_FLAG(name)
+# define GMOCK_DECLARE_string_(name) \
+    extern GTEST_API_ ::std::string GMOCK_FLAG(name)
+
+// Macros for defining flags.
+# define GMOCK_DEFINE_bool_(name, default_val, doc) \
+    GTEST_API_ bool GMOCK_FLAG(name) = (default_val)
+# define GMOCK_DEFINE_int32_(name, default_val, doc) \
+    GTEST_API_ int32_t GMOCK_FLAG(name) = (default_val)
+# define GMOCK_DEFINE_string_(name, default_val, doc) \
+    GTEST_API_ ::std::string GMOCK_FLAG(name) = (default_val)
+
+#endif  // !defined(GMOCK_DECLARE_bool_)
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PORT_H_
+
+namespace testing {
+
+template <typename>
+class Matcher;
+
+namespace internal {
+
+// Silence MSVC C4100 (unreferenced formal parameter) and
+// C4805('==': unsafe mix of type 'const int' and type 'const bool')
+#ifdef _MSC_VER
+# pragma warning(push)
+# pragma warning(disable:4100)
+# pragma warning(disable:4805)
+#endif
+
+// Joins a vector of strings as if they are fields of a tuple; returns
+// the joined string.
+GTEST_API_ std::string JoinAsTuple(const Strings& fields);
+
+// Converts an identifier name to a space-separated list of lower-case
+// words.  Each maximum substring of the form [A-Za-z][a-z]*|\d+ is
+// treated as one word.  For example, both "FooBar123" and
+// "foo_bar_123" are converted to "foo bar 123".
+GTEST_API_ std::string ConvertIdentifierNameToWords(const char* id_name);
+
+// GetRawPointer(p) returns the raw pointer underlying p when p is a
+// smart pointer, or returns p itself when p is already a raw pointer.
+// The following default implementation is for the smart pointer case.
+template <typename Pointer>
+inline const typename Pointer::element_type* GetRawPointer(const Pointer& p) {
+  return p.get();
+}
+// This overloaded version is for the raw pointer case.
+template <typename Element>
+inline Element* GetRawPointer(Element* p) { return p; }
+
+// MSVC treats wchar_t as a native type usually, but treats it as the
+// same as unsigned short when the compiler option /Zc:wchar_t- is
+// specified.  It defines _NATIVE_WCHAR_T_DEFINED symbol when wchar_t
+// is a native type.
+#if defined(_MSC_VER) && !defined(_NATIVE_WCHAR_T_DEFINED)
+// wchar_t is a typedef.
+#else
+# define GMOCK_WCHAR_T_IS_NATIVE_ 1
+#endif
+
+// In what follows, we use the term "kind" to indicate whether a type
+// is bool, an integer type (excluding bool), a floating-point type,
+// or none of them.  This categorization is useful for determining
+// when a matcher argument type can be safely converted to another
+// type in the implementation of SafeMatcherCast.
+enum TypeKind {
+  kBool, kInteger, kFloatingPoint, kOther
+};
+
+// KindOf<T>::value is the kind of type T.
+template <typename T> struct KindOf {
+  enum { value = kOther };  // The default kind.
+};
+
+// This macro declares that the kind of 'type' is 'kind'.
+#define GMOCK_DECLARE_KIND_(type, kind) \
+  template <> struct KindOf<type> { enum { value = kind }; }
+
+GMOCK_DECLARE_KIND_(bool, kBool);
+
+// All standard integer types.
+GMOCK_DECLARE_KIND_(char, kInteger);
+GMOCK_DECLARE_KIND_(signed char, kInteger);
+GMOCK_DECLARE_KIND_(unsigned char, kInteger);
+GMOCK_DECLARE_KIND_(short, kInteger);  // NOLINT
+GMOCK_DECLARE_KIND_(unsigned short, kInteger);  // NOLINT
+GMOCK_DECLARE_KIND_(int, kInteger);
+GMOCK_DECLARE_KIND_(unsigned int, kInteger);
+GMOCK_DECLARE_KIND_(long, kInteger);  // NOLINT
+GMOCK_DECLARE_KIND_(unsigned long, kInteger);  // NOLINT
+GMOCK_DECLARE_KIND_(long long, kInteger);  // NOLINT
+GMOCK_DECLARE_KIND_(unsigned long long, kInteger);  // NOLINT
+
+#if GMOCK_WCHAR_T_IS_NATIVE_
+GMOCK_DECLARE_KIND_(wchar_t, kInteger);
+#endif
+
+// All standard floating-point types.
+GMOCK_DECLARE_KIND_(float, kFloatingPoint);
+GMOCK_DECLARE_KIND_(double, kFloatingPoint);
+GMOCK_DECLARE_KIND_(long double, kFloatingPoint);
+
+#undef GMOCK_DECLARE_KIND_
+
+// Evaluates to the kind of 'type'.
+#define GMOCK_KIND_OF_(type) \
+  static_cast< ::testing::internal::TypeKind>( \
+      ::testing::internal::KindOf<type>::value)
+
+// LosslessArithmeticConvertibleImpl<kFromKind, From, kToKind, To>::value
+// is true if and only if arithmetic type From can be losslessly converted to
+// arithmetic type To.
+//
+// It's the user's responsibility to ensure that both From and To are
+// raw (i.e. has no CV modifier, is not a pointer, and is not a
+// reference) built-in arithmetic types, kFromKind is the kind of
+// From, and kToKind is the kind of To; the value is
+// implementation-defined when the above pre-condition is violated.
+template <TypeKind kFromKind, typename From, TypeKind kToKind, typename To>
+using LosslessArithmeticConvertibleImpl = std::integral_constant<
+    bool,
+    // clang-format off
+      // Converting from bool is always lossless
+      (kFromKind == kBool) ? true
+      // Converting between any other type kinds will be lossy if the type
+      // kinds are not the same.
+    : (kFromKind != kToKind) ? false
+    : (kFromKind == kInteger &&
+       // Converting between integers of different widths is allowed so long
+       // as the conversion does not go from signed to unsigned.
+      (((sizeof(From) < sizeof(To)) &&
+        !(std::is_signed<From>::value && !std::is_signed<To>::value)) ||
+       // Converting between integers of the same width only requires the
+       // two types to have the same signedness.
+       ((sizeof(From) == sizeof(To)) &&
+        (std::is_signed<From>::value == std::is_signed<To>::value)))
+       ) ? true
+      // Floating point conversions are lossless if and only if `To` is at least
+      // as wide as `From`.
+    : (kFromKind == kFloatingPoint && (sizeof(From) <= sizeof(To))) ? true
+    : false
+    // clang-format on
+    >;
+
+// LosslessArithmeticConvertible<From, To>::value is true if and only if
+// arithmetic type From can be losslessly converted to arithmetic type To.
+//
+// It's the user's responsibility to ensure that both From and To are
+// raw (i.e. has no CV modifier, is not a pointer, and is not a
+// reference) built-in arithmetic types; the value is
+// implementation-defined when the above pre-condition is violated.
+template <typename From, typename To>
+using LosslessArithmeticConvertible =
+    LosslessArithmeticConvertibleImpl<GMOCK_KIND_OF_(From), From,
+                                      GMOCK_KIND_OF_(To), To>;
+
+// This interface knows how to report a Google Mock failure (either
+// non-fatal or fatal).
+class FailureReporterInterface {
+ public:
+  // The type of a failure (either non-fatal or fatal).
+  enum FailureType {
+    kNonfatal, kFatal
+  };
+
+  virtual ~FailureReporterInterface() {}
+
+  // Reports a failure that occurred at the given source file location.
+  virtual void ReportFailure(FailureType type, const char* file, int line,
+                             const std::string& message) = 0;
+};
+
+// Returns the failure reporter used by Google Mock.
+GTEST_API_ FailureReporterInterface* GetFailureReporter();
+
+// Asserts that condition is true; aborts the process with the given
+// message if condition is false.  We cannot use LOG(FATAL) or CHECK()
+// as Google Mock might be used to mock the log sink itself.  We
+// inline this function to prevent it from showing up in the stack
+// trace.
+inline void Assert(bool condition, const char* file, int line,
+                   const std::string& msg) {
+  if (!condition) {
+    GetFailureReporter()->ReportFailure(FailureReporterInterface::kFatal,
+                                        file, line, msg);
+  }
+}
+inline void Assert(bool condition, const char* file, int line) {
+  Assert(condition, file, line, "Assertion failed.");
+}
+
+// Verifies that condition is true; generates a non-fatal failure if
+// condition is false.
+inline void Expect(bool condition, const char* file, int line,
+                   const std::string& msg) {
+  if (!condition) {
+    GetFailureReporter()->ReportFailure(FailureReporterInterface::kNonfatal,
+                                        file, line, msg);
+  }
+}
+inline void Expect(bool condition, const char* file, int line) {
+  Expect(condition, file, line, "Expectation failed.");
+}
+
+// Severity level of a log.
+enum LogSeverity {
+  kInfo = 0,
+  kWarning = 1
+};
+
+// Valid values for the --gmock_verbose flag.
+
+// All logs (informational and warnings) are printed.
+const char kInfoVerbosity[] = "info";
+// Only warnings are printed.
+const char kWarningVerbosity[] = "warning";
+// No logs are printed.
+const char kErrorVerbosity[] = "error";
+
+// Returns true if and only if a log with the given severity is visible
+// according to the --gmock_verbose flag.
+GTEST_API_ bool LogIsVisible(LogSeverity severity);
+
+// Prints the given message to stdout if and only if 'severity' >= the level
+// specified by the --gmock_verbose flag.  If stack_frames_to_skip >=
+// 0, also prints the stack trace excluding the top
+// stack_frames_to_skip frames.  In opt mode, any positive
+// stack_frames_to_skip is treated as 0, since we don't know which
+// function calls will be inlined by the compiler and need to be
+// conservative.
+GTEST_API_ void Log(LogSeverity severity, const std::string& message,
+                    int stack_frames_to_skip);
+
+// A marker class that is used to resolve parameterless expectations to the
+// correct overload. This must not be instantiable, to prevent client code from
+// accidentally resolving to the overload; for example:
+//
+//    ON_CALL(mock, Method({}, nullptr))...
+//
+class WithoutMatchers {
+ private:
+  WithoutMatchers() {}
+  friend GTEST_API_ WithoutMatchers GetWithoutMatchers();
+};
+
+// Internal use only: access the singleton instance of WithoutMatchers.
+GTEST_API_ WithoutMatchers GetWithoutMatchers();
+
+// Disable MSVC warnings for infinite recursion, since in this case the
+// the recursion is unreachable.
+#ifdef _MSC_VER
+# pragma warning(push)
+# pragma warning(disable:4717)
+#endif
+
+// Invalid<T>() is usable as an expression of type T, but will terminate
+// the program with an assertion failure if actually run.  This is useful
+// when a value of type T is needed for compilation, but the statement
+// will not really be executed (or we don't care if the statement
+// crashes).
+template <typename T>
+inline T Invalid() {
+  Assert(false, "", -1, "Internal error: attempt to return invalid value");
+  // This statement is unreachable, and would never terminate even if it
+  // could be reached. It is provided only to placate compiler warnings
+  // about missing return statements.
+  return Invalid<T>();
+}
+
+#ifdef _MSC_VER
+# pragma warning(pop)
+#endif
+
+// Given a raw type (i.e. having no top-level reference or const
+// modifier) RawContainer that's either an STL-style container or a
+// native array, class StlContainerView<RawContainer> has the
+// following members:
+//
+//   - type is a type that provides an STL-style container view to
+//     (i.e. implements the STL container concept for) RawContainer;
+//   - const_reference is a type that provides a reference to a const
+//     RawContainer;
+//   - ConstReference(raw_container) returns a const reference to an STL-style
+//     container view to raw_container, which is a RawContainer.
+//   - Copy(raw_container) returns an STL-style container view of a
+//     copy of raw_container, which is a RawContainer.
+//
+// This generic version is used when RawContainer itself is already an
+// STL-style container.
+template <class RawContainer>
+class StlContainerView {
+ public:
+  typedef RawContainer type;
+  typedef const type& const_reference;
+
+  static const_reference ConstReference(const RawContainer& container) {
+    static_assert(!std::is_const<RawContainer>::value,
+                  "RawContainer type must not be const");
+    return container;
+  }
+  static type Copy(const RawContainer& container) { return container; }
+};
+
+// This specialization is used when RawContainer is a native array type.
+template <typename Element, size_t N>
+class StlContainerView<Element[N]> {
+ public:
+  typedef typename std::remove_const<Element>::type RawElement;
+  typedef internal::NativeArray<RawElement> type;
+  // NativeArray<T> can represent a native array either by value or by
+  // reference (selected by a constructor argument), so 'const type'
+  // can be used to reference a const native array.  We cannot
+  // 'typedef const type& const_reference' here, as that would mean
+  // ConstReference() has to return a reference to a local variable.
+  typedef const type const_reference;
+
+  static const_reference ConstReference(const Element (&array)[N]) {
+    static_assert(std::is_same<Element, RawElement>::value,
+                  "Element type must not be const");
+    return type(array, N, RelationToSourceReference());
+  }
+  static type Copy(const Element (&array)[N]) {
+    return type(array, N, RelationToSourceCopy());
+  }
+};
+
+// This specialization is used when RawContainer is a native array
+// represented as a (pointer, size) tuple.
+template <typename ElementPointer, typename Size>
+class StlContainerView< ::std::tuple<ElementPointer, Size> > {
+ public:
+  typedef typename std::remove_const<
+      typename std::pointer_traits<ElementPointer>::element_type>::type
+      RawElement;
+  typedef internal::NativeArray<RawElement> type;
+  typedef const type const_reference;
+
+  static const_reference ConstReference(
+      const ::std::tuple<ElementPointer, Size>& array) {
+    return type(std::get<0>(array), std::get<1>(array),
+                RelationToSourceReference());
+  }
+  static type Copy(const ::std::tuple<ElementPointer, Size>& array) {
+    return type(std::get<0>(array), std::get<1>(array), RelationToSourceCopy());
+  }
+};
+
+// The following specialization prevents the user from instantiating
+// StlContainer with a reference type.
+template <typename T> class StlContainerView<T&>;
+
+// A type transform to remove constness from the first part of a pair.
+// Pairs like that are used as the value_type of associative containers,
+// and this transform produces a similar but assignable pair.
+template <typename T>
+struct RemoveConstFromKey {
+  typedef T type;
+};
+
+// Partially specialized to remove constness from std::pair<const K, V>.
+template <typename K, typename V>
+struct RemoveConstFromKey<std::pair<const K, V> > {
+  typedef std::pair<K, V> type;
+};
+
+// Emit an assertion failure due to incorrect DoDefault() usage. Out-of-lined to
+// reduce code size.
+GTEST_API_ void IllegalDoDefault(const char* file, int line);
+
+template <typename F, typename Tuple, size_t... Idx>
+auto ApplyImpl(F&& f, Tuple&& args, IndexSequence<Idx...>) -> decltype(
+    std::forward<F>(f)(std::get<Idx>(std::forward<Tuple>(args))...)) {
+  return std::forward<F>(f)(std::get<Idx>(std::forward<Tuple>(args))...);
+}
+
+// Apply the function to a tuple of arguments.
+template <typename F, typename Tuple>
+auto Apply(F&& f, Tuple&& args) -> decltype(
+    ApplyImpl(std::forward<F>(f), std::forward<Tuple>(args),
+              MakeIndexSequence<std::tuple_size<
+                  typename std::remove_reference<Tuple>::type>::value>())) {
+  return ApplyImpl(std::forward<F>(f), std::forward<Tuple>(args),
+                   MakeIndexSequence<std::tuple_size<
+                       typename std::remove_reference<Tuple>::type>::value>());
+}
+
+// Template struct Function<F>, where F must be a function type, contains
+// the following typedefs:
+//
+//   Result:               the function's return type.
+//   Arg<N>:               the type of the N-th argument, where N starts with 0.
+//   ArgumentTuple:        the tuple type consisting of all parameters of F.
+//   ArgumentMatcherTuple: the tuple type consisting of Matchers for all
+//                         parameters of F.
+//   MakeResultVoid:       the function type obtained by substituting void
+//                         for the return type of F.
+//   MakeResultIgnoredValue:
+//                         the function type obtained by substituting Something
+//                         for the return type of F.
+template <typename T>
+struct Function;
+
+template <typename R, typename... Args>
+struct Function<R(Args...)> {
+  using Result = R;
+  static constexpr size_t ArgumentCount = sizeof...(Args);
+  template <size_t I>
+  using Arg = ElemFromList<I, Args...>;
+  using ArgumentTuple = std::tuple<Args...>;
+  using ArgumentMatcherTuple = std::tuple<Matcher<Args>...>;
+  using MakeResultVoid = void(Args...);
+  using MakeResultIgnoredValue = IgnoredValue(Args...);
+};
+
+template <typename R, typename... Args>
+constexpr size_t Function<R(Args...)>::ArgumentCount;
+
+#ifdef _MSC_VER
+# pragma warning(pop)
+#endif
+
+}  // namespace internal
+}  // namespace testing
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PP_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PP_H_
+
+// Expands and concatenates the arguments. Constructed macros reevaluate.
+#define GMOCK_PP_CAT(_1, _2) GMOCK_PP_INTERNAL_CAT(_1, _2)
+
+// Expands and stringifies the only argument.
+#define GMOCK_PP_STRINGIZE(...) GMOCK_PP_INTERNAL_STRINGIZE(__VA_ARGS__)
+
+// Returns empty. Given a variadic number of arguments.
+#define GMOCK_PP_EMPTY(...)
+
+// Returns a comma. Given a variadic number of arguments.
+#define GMOCK_PP_COMMA(...) ,
+
+// Returns the only argument.
+#define GMOCK_PP_IDENTITY(_1) _1
+
+// Evaluates to the number of arguments after expansion.
+//
+//   #define PAIR x, y
+//
+//   GMOCK_PP_NARG() => 1
+//   GMOCK_PP_NARG(x) => 1
+//   GMOCK_PP_NARG(x, y) => 2
+//   GMOCK_PP_NARG(PAIR) => 2
+//
+// Requires: the number of arguments after expansion is at most 15.
+#define GMOCK_PP_NARG(...) \
+  GMOCK_PP_INTERNAL_16TH(  \
+      (__VA_ARGS__, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0))
+
+// Returns 1 if the expansion of arguments has an unprotected comma. Otherwise
+// returns 0. Requires no more than 15 unprotected commas.
+#define GMOCK_PP_HAS_COMMA(...) \
+  GMOCK_PP_INTERNAL_16TH(       \
+      (__VA_ARGS__, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0))
+
+// Returns the first argument.
+#define GMOCK_PP_HEAD(...) GMOCK_PP_INTERNAL_HEAD((__VA_ARGS__, unusedArg))
+
+// Returns the tail. A variadic list of all arguments minus the first. Requires
+// at least one argument.
+#define GMOCK_PP_TAIL(...) GMOCK_PP_INTERNAL_TAIL((__VA_ARGS__))
+
+// Calls CAT(_Macro, NARG(__VA_ARGS__))(__VA_ARGS__)
+#define GMOCK_PP_VARIADIC_CALL(_Macro, ...) \
+  GMOCK_PP_IDENTITY(                        \
+      GMOCK_PP_CAT(_Macro, GMOCK_PP_NARG(__VA_ARGS__))(__VA_ARGS__))
+
+// If the arguments after expansion have no tokens, evaluates to `1`. Otherwise
+// evaluates to `0`.
+//
+// Requires: * the number of arguments after expansion is at most 15.
+//           * If the argument is a macro, it must be able to be called with one
+//             argument.
+//
+// Implementation details:
+//
+// There is one case when it generates a compile error: if the argument is macro
+// that cannot be called with one argument.
+//
+//   #define M(a, b)  // it doesn't matter what it expands to
+//
+//   // Expected: expands to `0`.
+//   // Actual: compile error.
+//   GMOCK_PP_IS_EMPTY(M)
+//
+// There are 4 cases tested:
+//
+// * __VA_ARGS__ possible expansion has no unparen'd commas. Expected 0.
+// * __VA_ARGS__ possible expansion is not enclosed in parenthesis. Expected 0.
+// * __VA_ARGS__ possible expansion is not a macro that ()-evaluates to a comma.
+//   Expected 0
+// * __VA_ARGS__ is empty, or has unparen'd commas, or is enclosed in
+//   parenthesis, or is a macro that ()-evaluates to comma. Expected 1.
+//
+// We trigger detection on '0001', i.e. on empty.
+#define GMOCK_PP_IS_EMPTY(...)                                               \
+  GMOCK_PP_INTERNAL_IS_EMPTY(GMOCK_PP_HAS_COMMA(__VA_ARGS__),                \
+                             GMOCK_PP_HAS_COMMA(GMOCK_PP_COMMA __VA_ARGS__), \
+                             GMOCK_PP_HAS_COMMA(__VA_ARGS__()),              \
+                             GMOCK_PP_HAS_COMMA(GMOCK_PP_COMMA __VA_ARGS__()))
+
+// Evaluates to _Then if _Cond is 1 and _Else if _Cond is 0.
+#define GMOCK_PP_IF(_Cond, _Then, _Else) \
+  GMOCK_PP_CAT(GMOCK_PP_INTERNAL_IF_, _Cond)(_Then, _Else)
+
+// Similar to GMOCK_PP_IF but takes _Then and _Else in parentheses.
+//
+// GMOCK_PP_GENERIC_IF(1, (a, b, c), (d, e, f)) => a, b, c
+// GMOCK_PP_GENERIC_IF(0, (a, b, c), (d, e, f)) => d, e, f
+//
+#define GMOCK_PP_GENERIC_IF(_Cond, _Then, _Else) \
+  GMOCK_PP_REMOVE_PARENS(GMOCK_PP_IF(_Cond, _Then, _Else))
+
+// Evaluates to the number of arguments after expansion. Identifies 'empty' as
+// 0.
+//
+//   #define PAIR x, y
+//
+//   GMOCK_PP_NARG0() => 0
+//   GMOCK_PP_NARG0(x) => 1
+//   GMOCK_PP_NARG0(x, y) => 2
+//   GMOCK_PP_NARG0(PAIR) => 2
+//
+// Requires: * the number of arguments after expansion is at most 15.
+//           * If the argument is a macro, it must be able to be called with one
+//             argument.
+#define GMOCK_PP_NARG0(...) \
+  GMOCK_PP_IF(GMOCK_PP_IS_EMPTY(__VA_ARGS__), 0, GMOCK_PP_NARG(__VA_ARGS__))
+
+// Expands to 1 if the first argument starts with something in parentheses,
+// otherwise to 0.
+#define GMOCK_PP_IS_BEGIN_PARENS(...)                              \
+  GMOCK_PP_HEAD(GMOCK_PP_CAT(GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_, \
+                             GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C __VA_ARGS__))
+
+// Expands to 1 is there is only one argument and it is enclosed in parentheses.
+#define GMOCK_PP_IS_ENCLOSED_PARENS(...)             \
+  GMOCK_PP_IF(GMOCK_PP_IS_BEGIN_PARENS(__VA_ARGS__), \
+              GMOCK_PP_IS_EMPTY(GMOCK_PP_EMPTY __VA_ARGS__), 0)
+
+// Remove the parens, requires GMOCK_PP_IS_ENCLOSED_PARENS(args) => 1.
+#define GMOCK_PP_REMOVE_PARENS(...) GMOCK_PP_INTERNAL_REMOVE_PARENS __VA_ARGS__
+
+// Expands to _Macro(0, _Data, e1) _Macro(1, _Data, e2) ... _Macro(K -1, _Data,
+// eK) as many of GMOCK_INTERNAL_NARG0 _Tuple.
+// Requires: * |_Macro| can be called with 3 arguments.
+//           * |_Tuple| expansion has no more than 15 elements.
+#define GMOCK_PP_FOR_EACH(_Macro, _Data, _Tuple)                        \
+  GMOCK_PP_CAT(GMOCK_PP_INTERNAL_FOR_EACH_IMPL_, GMOCK_PP_NARG0 _Tuple) \
+  (0, _Macro, _Data, _Tuple)
+
+// Expands to _Macro(0, _Data, ) _Macro(1, _Data, ) ... _Macro(K - 1, _Data, )
+// Empty if _K = 0.
+// Requires: * |_Macro| can be called with 3 arguments.
+//           * |_K| literal between 0 and 15
+#define GMOCK_PP_REPEAT(_Macro, _Data, _N)           \
+  GMOCK_PP_CAT(GMOCK_PP_INTERNAL_FOR_EACH_IMPL_, _N) \
+  (0, _Macro, _Data, GMOCK_PP_INTENRAL_EMPTY_TUPLE)
+
+// Increments the argument, requires the argument to be between 0 and 15.
+#define GMOCK_PP_INC(_i) GMOCK_PP_CAT(GMOCK_PP_INTERNAL_INC_, _i)
+
+// Returns comma if _i != 0. Requires _i to be between 0 and 15.
+#define GMOCK_PP_COMMA_IF(_i) GMOCK_PP_CAT(GMOCK_PP_INTERNAL_COMMA_IF_, _i)
+
+// Internal details follow. Do not use any of these symbols outside of this
+// file or we will break your code.
+#define GMOCK_PP_INTENRAL_EMPTY_TUPLE (, , , , , , , , , , , , , , , )
+#define GMOCK_PP_INTERNAL_CAT(_1, _2) _1##_2
+#define GMOCK_PP_INTERNAL_STRINGIZE(...) #__VA_ARGS__
+#define GMOCK_PP_INTERNAL_CAT_5(_1, _2, _3, _4, _5) _1##_2##_3##_4##_5
+#define GMOCK_PP_INTERNAL_IS_EMPTY(_1, _2, _3, _4)                             \
+  GMOCK_PP_HAS_COMMA(GMOCK_PP_INTERNAL_CAT_5(GMOCK_PP_INTERNAL_IS_EMPTY_CASE_, \
+                                             _1, _2, _3, _4))
+#define GMOCK_PP_INTERNAL_IS_EMPTY_CASE_0001 ,
+#define GMOCK_PP_INTERNAL_IF_1(_Then, _Else) _Then
+#define GMOCK_PP_INTERNAL_IF_0(_Then, _Else) _Else
+
+// Because of MSVC treating a token with a comma in it as a single token when
+// passed to another macro, we need to force it to evaluate it as multiple
+// tokens. We do that by using a "IDENTITY(MACRO PARENTHESIZED_ARGS)" macro. We
+// define one per possible macro that relies on this behavior. Note "_Args" must
+// be parenthesized.
+#define GMOCK_PP_INTERNAL_INTERNAL_16TH(_1, _2, _3, _4, _5, _6, _7, _8, _9, \
+                                        _10, _11, _12, _13, _14, _15, _16,  \
+                                        ...)                                \
+  _16
+#define GMOCK_PP_INTERNAL_16TH(_Args) \
+  GMOCK_PP_IDENTITY(GMOCK_PP_INTERNAL_INTERNAL_16TH _Args)
+#define GMOCK_PP_INTERNAL_INTERNAL_HEAD(_1, ...) _1
+#define GMOCK_PP_INTERNAL_HEAD(_Args) \
+  GMOCK_PP_IDENTITY(GMOCK_PP_INTERNAL_INTERNAL_HEAD _Args)
+#define GMOCK_PP_INTERNAL_INTERNAL_TAIL(_1, ...) __VA_ARGS__
+#define GMOCK_PP_INTERNAL_TAIL(_Args) \
+  GMOCK_PP_IDENTITY(GMOCK_PP_INTERNAL_INTERNAL_TAIL _Args)
+
+#define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C(...) 1 _
+#define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_1 1,
+#define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C \
+  0,
+#define GMOCK_PP_INTERNAL_REMOVE_PARENS(...) __VA_ARGS__
+#define GMOCK_PP_INTERNAL_INC_0 1
+#define GMOCK_PP_INTERNAL_INC_1 2
+#define GMOCK_PP_INTERNAL_INC_2 3
+#define GMOCK_PP_INTERNAL_INC_3 4
+#define GMOCK_PP_INTERNAL_INC_4 5
+#define GMOCK_PP_INTERNAL_INC_5 6
+#define GMOCK_PP_INTERNAL_INC_6 7
+#define GMOCK_PP_INTERNAL_INC_7 8
+#define GMOCK_PP_INTERNAL_INC_8 9
+#define GMOCK_PP_INTERNAL_INC_9 10
+#define GMOCK_PP_INTERNAL_INC_10 11
+#define GMOCK_PP_INTERNAL_INC_11 12
+#define GMOCK_PP_INTERNAL_INC_12 13
+#define GMOCK_PP_INTERNAL_INC_13 14
+#define GMOCK_PP_INTERNAL_INC_14 15
+#define GMOCK_PP_INTERNAL_INC_15 16
+#define GMOCK_PP_INTERNAL_COMMA_IF_0
+#define GMOCK_PP_INTERNAL_COMMA_IF_1 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_2 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_3 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_4 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_5 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_6 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_7 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_8 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_9 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_10 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_11 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_12 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_13 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_14 ,
+#define GMOCK_PP_INTERNAL_COMMA_IF_15 ,
+#define GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, _element) \
+  _Macro(_i, _Data, _element)
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_0(_i, _Macro, _Data, _Tuple)
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_1(_i, _Macro, _Data, _Tuple) \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple)
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_2(_i, _Macro, _Data, _Tuple)    \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_1(GMOCK_PP_INC(_i), _Macro, _Data,    \
+                                    (GMOCK_PP_TAIL _Tuple))
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_3(_i, _Macro, _Data, _Tuple)    \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_2(GMOCK_PP_INC(_i), _Macro, _Data,    \
+                                    (GMOCK_PP_TAIL _Tuple))
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_4(_i, _Macro, _Data, _Tuple)    \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_3(GMOCK_PP_INC(_i), _Macro, _Data,    \
+                                    (GMOCK_PP_TAIL _Tuple))
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_5(_i, _Macro, _Data, _Tuple)    \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_4(GMOCK_PP_INC(_i), _Macro, _Data,    \
+                                    (GMOCK_PP_TAIL _Tuple))
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_6(_i, _Macro, _Data, _Tuple)    \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_5(GMOCK_PP_INC(_i), _Macro, _Data,    \
+                                    (GMOCK_PP_TAIL _Tuple))
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_7(_i, _Macro, _Data, _Tuple)    \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_6(GMOCK_PP_INC(_i), _Macro, _Data,    \
+                                    (GMOCK_PP_TAIL _Tuple))
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_8(_i, _Macro, _Data, _Tuple)    \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_7(GMOCK_PP_INC(_i), _Macro, _Data,    \
+                                    (GMOCK_PP_TAIL _Tuple))
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_9(_i, _Macro, _Data, _Tuple)    \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_8(GMOCK_PP_INC(_i), _Macro, _Data,    \
+                                    (GMOCK_PP_TAIL _Tuple))
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_10(_i, _Macro, _Data, _Tuple)   \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_9(GMOCK_PP_INC(_i), _Macro, _Data,    \
+                                    (GMOCK_PP_TAIL _Tuple))
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_11(_i, _Macro, _Data, _Tuple)   \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_10(GMOCK_PP_INC(_i), _Macro, _Data,   \
+                                     (GMOCK_PP_TAIL _Tuple))
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_12(_i, _Macro, _Data, _Tuple)   \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_11(GMOCK_PP_INC(_i), _Macro, _Data,   \
+                                     (GMOCK_PP_TAIL _Tuple))
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_13(_i, _Macro, _Data, _Tuple)   \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_12(GMOCK_PP_INC(_i), _Macro, _Data,   \
+                                     (GMOCK_PP_TAIL _Tuple))
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_14(_i, _Macro, _Data, _Tuple)   \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_13(GMOCK_PP_INC(_i), _Macro, _Data,   \
+                                     (GMOCK_PP_TAIL _Tuple))
+#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_15(_i, _Macro, _Data, _Tuple)   \
+  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
+  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_14(GMOCK_PP_INC(_i), _Macro, _Data,   \
+                                     (GMOCK_PP_TAIL _Tuple))
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PP_H_
+
+#ifdef _MSC_VER
+# pragma warning(push)
+# pragma warning(disable:4100)
+#endif
+
+namespace testing {
+
+// To implement an action Foo, define:
+//   1. a class FooAction that implements the ActionInterface interface, and
+//   2. a factory function that creates an Action object from a
+//      const FooAction*.
+//
+// The two-level delegation design follows that of Matcher, providing
+// consistency for extension developers.  It also eases ownership
+// management as Action objects can now be copied like plain values.
+
+namespace internal {
+
+// BuiltInDefaultValueGetter<T, true>::Get() returns a
+// default-constructed T value.  BuiltInDefaultValueGetter<T,
+// false>::Get() crashes with an error.
+//
+// This primary template is used when kDefaultConstructible is true.
+template <typename T, bool kDefaultConstructible>
+struct BuiltInDefaultValueGetter {
+  static T Get() { return T(); }
+};
+template <typename T>
+struct BuiltInDefaultValueGetter<T, false> {
+  static T Get() {
+    Assert(false, __FILE__, __LINE__,
+           "Default action undefined for the function return type.");
+    return internal::Invalid<T>();
+    // The above statement will never be reached, but is required in
+    // order for this function to compile.
+  }
+};
+
+// BuiltInDefaultValue<T>::Get() returns the "built-in" default value
+// for type T, which is NULL when T is a raw pointer type, 0 when T is
+// a numeric type, false when T is bool, or "" when T is string or
+// std::string.  In addition, in C++11 and above, it turns a
+// default-constructed T value if T is default constructible.  For any
+// other type T, the built-in default T value is undefined, and the
+// function will abort the process.
+template <typename T>
+class BuiltInDefaultValue {
+ public:
+  // This function returns true if and only if type T has a built-in default
+  // value.
+  static bool Exists() {
+    return ::std::is_default_constructible<T>::value;
+  }
+
+  static T Get() {
+    return BuiltInDefaultValueGetter<
+        T, ::std::is_default_constructible<T>::value>::Get();
+  }
+};
+
+// This partial specialization says that we use the same built-in
+// default value for T and const T.
+template <typename T>
+class BuiltInDefaultValue<const T> {
+ public:
+  static bool Exists() { return BuiltInDefaultValue<T>::Exists(); }
+  static T Get() { return BuiltInDefaultValue<T>::Get(); }
+};
+
+// This partial specialization defines the default values for pointer
+// types.
+template <typename T>
+class BuiltInDefaultValue<T*> {
+ public:
+  static bool Exists() { return true; }
+  static T* Get() { return nullptr; }
+};
+
+// The following specializations define the default values for
+// specific types we care about.
+#define GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(type, value) \
+  template <> \
+  class BuiltInDefaultValue<type> { \
+   public: \
+    static bool Exists() { return true; } \
+    static type Get() { return value; } \
+  }
+
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(void, );  // NOLINT
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(::std::string, "");
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(bool, false);
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned char, '\0');
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed char, '\0');
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(char, '\0');
+
+// There's no need for a default action for signed wchar_t, as that
+// type is the same as wchar_t for gcc, and invalid for MSVC.
+//
+// There's also no need for a default action for unsigned wchar_t, as
+// that type is the same as unsigned int for gcc, and invalid for
+// MSVC.
+#if GMOCK_WCHAR_T_IS_NATIVE_
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(wchar_t, 0U);  // NOLINT
+#endif
+
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned short, 0U);  // NOLINT
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed short, 0);     // NOLINT
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned int, 0U);
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed int, 0);
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned long, 0UL);  // NOLINT
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed long, 0L);     // NOLINT
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned long long, 0);  // NOLINT
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed long long, 0);  // NOLINT
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(float, 0);
+GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(double, 0);
+
+#undef GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_
+
+// Simple two-arg form of std::disjunction.
+template <typename P, typename Q>
+using disjunction = typename ::std::conditional<P::value, P, Q>::type;
+
+}  // namespace internal
+
+// When an unexpected function call is encountered, Google Mock will
+// let it return a default value if the user has specified one for its
+// return type, or if the return type has a built-in default value;
+// otherwise Google Mock won't know what value to return and will have
+// to abort the process.
+//
+// The DefaultValue<T> class allows a user to specify the
+// default value for a type T that is both copyable and publicly
+// destructible (i.e. anything that can be used as a function return
+// type).  The usage is:
+//
+//   // Sets the default value for type T to be foo.
+//   DefaultValue<T>::Set(foo);
+template <typename T>
+class DefaultValue {
+ public:
+  // Sets the default value for type T; requires T to be
+  // copy-constructable and have a public destructor.
+  static void Set(T x) {
+    delete producer_;
+    producer_ = new FixedValueProducer(x);
+  }
+
+  // Provides a factory function to be called to generate the default value.
+  // This method can be used even if T is only move-constructible, but it is not
+  // limited to that case.
+  typedef T (*FactoryFunction)();
+  static void SetFactory(FactoryFunction factory) {
+    delete producer_;
+    producer_ = new FactoryValueProducer(factory);
+  }
+
+  // Unsets the default value for type T.
+  static void Clear() {
+    delete producer_;
+    producer_ = nullptr;
+  }
+
+  // Returns true if and only if the user has set the default value for type T.
+  static bool IsSet() { return producer_ != nullptr; }
+
+  // Returns true if T has a default return value set by the user or there
+  // exists a built-in default value.
+  static bool Exists() {
+    return IsSet() || internal::BuiltInDefaultValue<T>::Exists();
+  }
+
+  // Returns the default value for type T if the user has set one;
+  // otherwise returns the built-in default value. Requires that Exists()
+  // is true, which ensures that the return value is well-defined.
+  static T Get() {
+    return producer_ == nullptr ? internal::BuiltInDefaultValue<T>::Get()
+                                : producer_->Produce();
+  }
+
+ private:
+  class ValueProducer {
+   public:
+    virtual ~ValueProducer() {}
+    virtual T Produce() = 0;
+  };
+
+  class FixedValueProducer : public ValueProducer {
+   public:
+    explicit FixedValueProducer(T value) : value_(value) {}
+    T Produce() override { return value_; }
+
+   private:
+    const T value_;
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(FixedValueProducer);
+  };
+
+  class FactoryValueProducer : public ValueProducer {
+   public:
+    explicit FactoryValueProducer(FactoryFunction factory)
+        : factory_(factory) {}
+    T Produce() override { return factory_(); }
+
+   private:
+    const FactoryFunction factory_;
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(FactoryValueProducer);
+  };
+
+  static ValueProducer* producer_;
+};
+
+// This partial specialization allows a user to set default values for
+// reference types.
+template <typename T>
+class DefaultValue<T&> {
+ public:
+  // Sets the default value for type T&.
+  static void Set(T& x) {  // NOLINT
+    address_ = &x;
+  }
+
+  // Unsets the default value for type T&.
+  static void Clear() { address_ = nullptr; }
+
+  // Returns true if and only if the user has set the default value for type T&.
+  static bool IsSet() { return address_ != nullptr; }
+
+  // Returns true if T has a default return value set by the user or there
+  // exists a built-in default value.
+  static bool Exists() {
+    return IsSet() || internal::BuiltInDefaultValue<T&>::Exists();
+  }
+
+  // Returns the default value for type T& if the user has set one;
+  // otherwise returns the built-in default value if there is one;
+  // otherwise aborts the process.
+  static T& Get() {
+    return address_ == nullptr ? internal::BuiltInDefaultValue<T&>::Get()
+                               : *address_;
+  }
+
+ private:
+  static T* address_;
+};
+
+// This specialization allows DefaultValue<void>::Get() to
+// compile.
+template <>
+class DefaultValue<void> {
+ public:
+  static bool Exists() { return true; }
+  static void Get() {}
+};
+
+// Points to the user-set default value for type T.
+template <typename T>
+typename DefaultValue<T>::ValueProducer* DefaultValue<T>::producer_ = nullptr;
+
+// Points to the user-set default value for type T&.
+template <typename T>
+T* DefaultValue<T&>::address_ = nullptr;
+
+// Implement this interface to define an action for function type F.
+template <typename F>
+class ActionInterface {
+ public:
+  typedef typename internal::Function<F>::Result Result;
+  typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
+
+  ActionInterface() {}
+  virtual ~ActionInterface() {}
+
+  // Performs the action.  This method is not const, as in general an
+  // action can have side effects and be stateful.  For example, a
+  // get-the-next-element-from-the-collection action will need to
+  // remember the current element.
+  virtual Result Perform(const ArgumentTuple& args) = 0;
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ActionInterface);
+};
+
+// An Action<F> is a copyable and IMMUTABLE (except by assignment)
+// object that represents an action to be taken when a mock function
+// of type F is called.  The implementation of Action<T> is just a
+// std::shared_ptr to const ActionInterface<T>. Don't inherit from Action!
+// You can view an object implementing ActionInterface<F> as a
+// concrete action (including its current state), and an Action<F>
+// object as a handle to it.
+template <typename F>
+class Action {
+  // Adapter class to allow constructing Action from a legacy ActionInterface.
+  // New code should create Actions from functors instead.
+  struct ActionAdapter {
+    // Adapter must be copyable to satisfy std::function requirements.
+    ::std::shared_ptr<ActionInterface<F>> impl_;
+
+    template <typename... Args>
+    typename internal::Function<F>::Result operator()(Args&&... args) {
+      return impl_->Perform(
+          ::std::forward_as_tuple(::std::forward<Args>(args)...));
+    }
+  };
+
+  template <typename G>
+  using IsCompatibleFunctor = std::is_constructible<std::function<F>, G>;
+
+ public:
+  typedef typename internal::Function<F>::Result Result;
+  typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
+
+  // Constructs a null Action.  Needed for storing Action objects in
+  // STL containers.
+  Action() {}
+
+  // Construct an Action from a specified callable.
+  // This cannot take std::function directly, because then Action would not be
+  // directly constructible from lambda (it would require two conversions).
+  template <
+      typename G,
+      typename = typename std::enable_if<internal::disjunction<
+          IsCompatibleFunctor<G>, std::is_constructible<std::function<Result()>,
+                                                        G>>::value>::type>
+  Action(G&& fun) {  // NOLINT
+    Init(::std::forward<G>(fun), IsCompatibleFunctor<G>());
+  }
+
+  // Constructs an Action from its implementation.
+  explicit Action(ActionInterface<F>* impl)
+      : fun_(ActionAdapter{::std::shared_ptr<ActionInterface<F>>(impl)}) {}
+
+  // This constructor allows us to turn an Action<Func> object into an
+  // Action<F>, as long as F's arguments can be implicitly converted
+  // to Func's and Func's return type can be implicitly converted to F's.
+  template <typename Func>
+  explicit Action(const Action<Func>& action) : fun_(action.fun_) {}
+
+  // Returns true if and only if this is the DoDefault() action.
+  bool IsDoDefault() const { return fun_ == nullptr; }
+
+  // Performs the action.  Note that this method is const even though
+  // the corresponding method in ActionInterface is not.  The reason
+  // is that a const Action<F> means that it cannot be re-bound to
+  // another concrete action, not that the concrete action it binds to
+  // cannot change state.  (Think of the difference between a const
+  // pointer and a pointer to const.)
+  Result Perform(ArgumentTuple args) const {
+    if (IsDoDefault()) {
+      internal::IllegalDoDefault(__FILE__, __LINE__);
+    }
+    return internal::Apply(fun_, ::std::move(args));
+  }
+
+ private:
+  template <typename G>
+  friend class Action;
+
+  template <typename G>
+  void Init(G&& g, ::std::true_type) {
+    fun_ = ::std::forward<G>(g);
+  }
+
+  template <typename G>
+  void Init(G&& g, ::std::false_type) {
+    fun_ = IgnoreArgs<typename ::std::decay<G>::type>{::std::forward<G>(g)};
+  }
+
+  template <typename FunctionImpl>
+  struct IgnoreArgs {
+    template <typename... Args>
+    Result operator()(const Args&...) const {
+      return function_impl();
+    }
+
+    FunctionImpl function_impl;
+  };
+
+  // fun_ is an empty function if and only if this is the DoDefault() action.
+  ::std::function<F> fun_;
+};
+
+// The PolymorphicAction class template makes it easy to implement a
+// polymorphic action (i.e. an action that can be used in mock
+// functions of than one type, e.g. Return()).
+//
+// To define a polymorphic action, a user first provides a COPYABLE
+// implementation class that has a Perform() method template:
+//
+//   class FooAction {
+//    public:
+//     template <typename Result, typename ArgumentTuple>
+//     Result Perform(const ArgumentTuple& args) const {
+//       // Processes the arguments and returns a result, using
+//       // std::get<N>(args) to get the N-th (0-based) argument in the tuple.
+//     }
+//     ...
+//   };
+//
+// Then the user creates the polymorphic action using
+// MakePolymorphicAction(object) where object has type FooAction.  See
+// the definition of Return(void) and SetArgumentPointee<N>(value) for
+// complete examples.
+template <typename Impl>
+class PolymorphicAction {
+ public:
+  explicit PolymorphicAction(const Impl& impl) : impl_(impl) {}
+
+  template <typename F>
+  operator Action<F>() const {
+    return Action<F>(new MonomorphicImpl<F>(impl_));
+  }
+
+ private:
+  template <typename F>
+  class MonomorphicImpl : public ActionInterface<F> {
+   public:
+    typedef typename internal::Function<F>::Result Result;
+    typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
+
+    explicit MonomorphicImpl(const Impl& impl) : impl_(impl) {}
+
+    Result Perform(const ArgumentTuple& args) override {
+      return impl_.template Perform<Result>(args);
+    }
+
+   private:
+    Impl impl_;
+  };
+
+  Impl impl_;
+};
+
+// Creates an Action from its implementation and returns it.  The
+// created Action object owns the implementation.
+template <typename F>
+Action<F> MakeAction(ActionInterface<F>* impl) {
+  return Action<F>(impl);
+}
+
+// Creates a polymorphic action from its implementation.  This is
+// easier to use than the PolymorphicAction<Impl> constructor as it
+// doesn't require you to explicitly write the template argument, e.g.
+//
+//   MakePolymorphicAction(foo);
+// vs
+//   PolymorphicAction<TypeOfFoo>(foo);
+template <typename Impl>
+inline PolymorphicAction<Impl> MakePolymorphicAction(const Impl& impl) {
+  return PolymorphicAction<Impl>(impl);
+}
+
+namespace internal {
+
+// Helper struct to specialize ReturnAction to execute a move instead of a copy
+// on return. Useful for move-only types, but could be used on any type.
+template <typename T>
+struct ByMoveWrapper {
+  explicit ByMoveWrapper(T value) : payload(std::move(value)) {}
+  T payload;
+};
+
+// Implements the polymorphic Return(x) action, which can be used in
+// any function that returns the type of x, regardless of the argument
+// types.
+//
+// Note: The value passed into Return must be converted into
+// Function<F>::Result when this action is cast to Action<F> rather than
+// when that action is performed. This is important in scenarios like
+//
+// MOCK_METHOD1(Method, T(U));
+// ...
+// {
+//   Foo foo;
+//   X x(&foo);
+//   EXPECT_CALL(mock, Method(_)).WillOnce(Return(x));
+// }
+//
+// In the example above the variable x holds reference to foo which leaves
+// scope and gets destroyed.  If copying X just copies a reference to foo,
+// that copy will be left with a hanging reference.  If conversion to T
+// makes a copy of foo, the above code is safe. To support that scenario, we
+// need to make sure that the type conversion happens inside the EXPECT_CALL
+// statement, and conversion of the result of Return to Action<T(U)> is a
+// good place for that.
+//
+// The real life example of the above scenario happens when an invocation
+// of gtl::Container() is passed into Return.
+//
+template <typename R>
+class ReturnAction {
+ public:
+  // Constructs a ReturnAction object from the value to be returned.
+  // 'value' is passed by value instead of by const reference in order
+  // to allow Return("string literal") to compile.
+  explicit ReturnAction(R value) : value_(new R(std::move(value))) {}
+
+  // This template type conversion operator allows Return(x) to be
+  // used in ANY function that returns x's type.
+  template <typename F>
+  operator Action<F>() const {  // NOLINT
+    // Assert statement belongs here because this is the best place to verify
+    // conditions on F. It produces the clearest error messages
+    // in most compilers.
+    // Impl really belongs in this scope as a local class but can't
+    // because MSVC produces duplicate symbols in different translation units
+    // in this case. Until MS fixes that bug we put Impl into the class scope
+    // and put the typedef both here (for use in assert statement) and
+    // in the Impl class. But both definitions must be the same.
+    typedef typename Function<F>::Result Result;
+    GTEST_COMPILE_ASSERT_(
+        !std::is_reference<Result>::value,
+        use_ReturnRef_instead_of_Return_to_return_a_reference);
+    static_assert(!std::is_void<Result>::value,
+                  "Can't use Return() on an action expected to return `void`.");
+    return Action<F>(new Impl<R, F>(value_));
+  }
+
+ private:
+  // Implements the Return(x) action for a particular function type F.
+  template <typename R_, typename F>
+  class Impl : public ActionInterface<F> {
+   public:
+    typedef typename Function<F>::Result Result;
+    typedef typename Function<F>::ArgumentTuple ArgumentTuple;
+
+    // The implicit cast is necessary when Result has more than one
+    // single-argument constructor (e.g. Result is std::vector<int>) and R
+    // has a type conversion operator template.  In that case, value_(value)
+    // won't compile as the compiler doesn't known which constructor of
+    // Result to call.  ImplicitCast_ forces the compiler to convert R to
+    // Result without considering explicit constructors, thus resolving the
+    // ambiguity. value_ is then initialized using its copy constructor.
+    explicit Impl(const std::shared_ptr<R>& value)
+        : value_before_cast_(*value),
+          value_(ImplicitCast_<Result>(value_before_cast_)) {}
+
+    Result Perform(const ArgumentTuple&) override { return value_; }
+
+   private:
+    GTEST_COMPILE_ASSERT_(!std::is_reference<Result>::value,
+                          Result_cannot_be_a_reference_type);
+    // We save the value before casting just in case it is being cast to a
+    // wrapper type.
+    R value_before_cast_;
+    Result value_;
+
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(Impl);
+  };
+
+  // Partially specialize for ByMoveWrapper. This version of ReturnAction will
+  // move its contents instead.
+  template <typename R_, typename F>
+  class Impl<ByMoveWrapper<R_>, F> : public ActionInterface<F> {
+   public:
+    typedef typename Function<F>::Result Result;
+    typedef typename Function<F>::ArgumentTuple ArgumentTuple;
+
+    explicit Impl(const std::shared_ptr<R>& wrapper)
+        : performed_(false), wrapper_(wrapper) {}
+
+    Result Perform(const ArgumentTuple&) override {
+      GTEST_CHECK_(!performed_)
+          << "A ByMove() action should only be performed once.";
+      performed_ = true;
+      return std::move(wrapper_->payload);
+    }
+
+   private:
+    bool performed_;
+    const std::shared_ptr<R> wrapper_;
+  };
+
+  const std::shared_ptr<R> value_;
+};
+
+// Implements the ReturnNull() action.
+class ReturnNullAction {
+ public:
+  // Allows ReturnNull() to be used in any pointer-returning function. In C++11
+  // this is enforced by returning nullptr, and in non-C++11 by asserting a
+  // pointer type on compile time.
+  template <typename Result, typename ArgumentTuple>
+  static Result Perform(const ArgumentTuple&) {
+    return nullptr;
+  }
+};
+
+// Implements the Return() action.
+class ReturnVoidAction {
+ public:
+  // Allows Return() to be used in any void-returning function.
+  template <typename Result, typename ArgumentTuple>
+  static void Perform(const ArgumentTuple&) {
+    static_assert(std::is_void<Result>::value, "Result should be void.");
+  }
+};
+
+// Implements the polymorphic ReturnRef(x) action, which can be used
+// in any function that returns a reference to the type of x,
+// regardless of the argument types.
+template <typename T>
+class ReturnRefAction {
+ public:
+  // Constructs a ReturnRefAction object from the reference to be returned.
+  explicit ReturnRefAction(T& ref) : ref_(ref) {}  // NOLINT
+
+  // This template type conversion operator allows ReturnRef(x) to be
+  // used in ANY function that returns a reference to x's type.
+  template <typename F>
+  operator Action<F>() const {
+    typedef typename Function<F>::Result Result;
+    // Asserts that the function return type is a reference.  This
+    // catches the user error of using ReturnRef(x) when Return(x)
+    // should be used, and generates some helpful error message.
+    GTEST_COMPILE_ASSERT_(std::is_reference<Result>::value,
+                          use_Return_instead_of_ReturnRef_to_return_a_value);
+    return Action<F>(new Impl<F>(ref_));
+  }
+
+ private:
+  // Implements the ReturnRef(x) action for a particular function type F.
+  template <typename F>
+  class Impl : public ActionInterface<F> {
+   public:
+    typedef typename Function<F>::Result Result;
+    typedef typename Function<F>::ArgumentTuple ArgumentTuple;
+
+    explicit Impl(T& ref) : ref_(ref) {}  // NOLINT
+
+    Result Perform(const ArgumentTuple&) override { return ref_; }
+
+   private:
+    T& ref_;
+  };
+
+  T& ref_;
+};
+
+// Implements the polymorphic ReturnRefOfCopy(x) action, which can be
+// used in any function that returns a reference to the type of x,
+// regardless of the argument types.
+template <typename T>
+class ReturnRefOfCopyAction {
+ public:
+  // Constructs a ReturnRefOfCopyAction object from the reference to
+  // be returned.
+  explicit ReturnRefOfCopyAction(const T& value) : value_(value) {}  // NOLINT
+
+  // This template type conversion operator allows ReturnRefOfCopy(x) to be
+  // used in ANY function that returns a reference to x's type.
+  template <typename F>
+  operator Action<F>() const {
+    typedef typename Function<F>::Result Result;
+    // Asserts that the function return type is a reference.  This
+    // catches the user error of using ReturnRefOfCopy(x) when Return(x)
+    // should be used, and generates some helpful error message.
+    GTEST_COMPILE_ASSERT_(
+        std::is_reference<Result>::value,
+        use_Return_instead_of_ReturnRefOfCopy_to_return_a_value);
+    return Action<F>(new Impl<F>(value_));
+  }
+
+ private:
+  // Implements the ReturnRefOfCopy(x) action for a particular function type F.
+  template <typename F>
+  class Impl : public ActionInterface<F> {
+   public:
+    typedef typename Function<F>::Result Result;
+    typedef typename Function<F>::ArgumentTuple ArgumentTuple;
+
+    explicit Impl(const T& value) : value_(value) {}  // NOLINT
+
+    Result Perform(const ArgumentTuple&) override { return value_; }
+
+   private:
+    T value_;
+  };
+
+  const T value_;
+};
+
+// Implements the polymorphic ReturnRoundRobin(v) action, which can be
+// used in any function that returns the element_type of v.
+template <typename T>
+class ReturnRoundRobinAction {
+ public:
+  explicit ReturnRoundRobinAction(std::vector<T> values) {
+    GTEST_CHECK_(!values.empty())
+        << "ReturnRoundRobin requires at least one element.";
+    state_->values = std::move(values);
+  }
+
+  template <typename... Args>
+  T operator()(Args&&...) const {
+     return state_->Next();
+  }
+
+ private:
+  struct State {
+    T Next() {
+      T ret_val = values[i++];
+      if (i == values.size()) i = 0;
+      return ret_val;
+    }
+
+    std::vector<T> values;
+    size_t i = 0;
+  };
+  std::shared_ptr<State> state_ = std::make_shared<State>();
+};
+
+// Implements the polymorphic DoDefault() action.
+class DoDefaultAction {
+ public:
+  // This template type conversion operator allows DoDefault() to be
+  // used in any function.
+  template <typename F>
+  operator Action<F>() const { return Action<F>(); }  // NOLINT
+};
+
+// Implements the Assign action to set a given pointer referent to a
+// particular value.
+template <typename T1, typename T2>
+class AssignAction {
+ public:
+  AssignAction(T1* ptr, T2 value) : ptr_(ptr), value_(value) {}
+
+  template <typename Result, typename ArgumentTuple>
+  void Perform(const ArgumentTuple& /* args */) const {
+    *ptr_ = value_;
+  }
+
+ private:
+  T1* const ptr_;
+  const T2 value_;
+};
+
+#if !GTEST_OS_WINDOWS_MOBILE
+
+// Implements the SetErrnoAndReturn action to simulate return from
+// various system calls and libc functions.
+template <typename T>
+class SetErrnoAndReturnAction {
+ public:
+  SetErrnoAndReturnAction(int errno_value, T result)
+      : errno_(errno_value),
+        result_(result) {}
+  template <typename Result, typename ArgumentTuple>
+  Result Perform(const ArgumentTuple& /* args */) const {
+    errno = errno_;
+    return result_;
+  }
+
+ private:
+  const int errno_;
+  const T result_;
+};
+
+#endif  // !GTEST_OS_WINDOWS_MOBILE
+
+// Implements the SetArgumentPointee<N>(x) action for any function
+// whose N-th argument (0-based) is a pointer to x's type.
+template <size_t N, typename A, typename = void>
+struct SetArgumentPointeeAction {
+  A value;
+
+  template <typename... Args>
+  void operator()(const Args&... args) const {
+    *::std::get<N>(std::tie(args...)) = value;
+  }
+};
+
+// Implements the Invoke(object_ptr, &Class::Method) action.
+template <class Class, typename MethodPtr>
+struct InvokeMethodAction {
+  Class* const obj_ptr;
+  const MethodPtr method_ptr;
+
+  template <typename... Args>
+  auto operator()(Args&&... args) const
+      -> decltype((obj_ptr->*method_ptr)(std::forward<Args>(args)...)) {
+    return (obj_ptr->*method_ptr)(std::forward<Args>(args)...);
+  }
+};
+
+// Implements the InvokeWithoutArgs(f) action.  The template argument
+// FunctionImpl is the implementation type of f, which can be either a
+// function pointer or a functor.  InvokeWithoutArgs(f) can be used as an
+// Action<F> as long as f's type is compatible with F.
+template <typename FunctionImpl>
+struct InvokeWithoutArgsAction {
+  FunctionImpl function_impl;
+
+  // Allows InvokeWithoutArgs(f) to be used as any action whose type is
+  // compatible with f.
+  template <typename... Args>
+  auto operator()(const Args&...) -> decltype(function_impl()) {
+    return function_impl();
+  }
+};
+
+// Implements the InvokeWithoutArgs(object_ptr, &Class::Method) action.
+template <class Class, typename MethodPtr>
+struct InvokeMethodWithoutArgsAction {
+  Class* const obj_ptr;
+  const MethodPtr method_ptr;
+
+  using ReturnType =
+      decltype((std::declval<Class*>()->*std::declval<MethodPtr>())());
+
+  template <typename... Args>
+  ReturnType operator()(const Args&...) const {
+    return (obj_ptr->*method_ptr)();
+  }
+};
+
+// Implements the IgnoreResult(action) action.
+template <typename A>
+class IgnoreResultAction {
+ public:
+  explicit IgnoreResultAction(const A& action) : action_(action) {}
+
+  template <typename F>
+  operator Action<F>() const {
+    // Assert statement belongs here because this is the best place to verify
+    // conditions on F. It produces the clearest error messages
+    // in most compilers.
+    // Impl really belongs in this scope as a local class but can't
+    // because MSVC produces duplicate symbols in different translation units
+    // in this case. Until MS fixes that bug we put Impl into the class scope
+    // and put the typedef both here (for use in assert statement) and
+    // in the Impl class. But both definitions must be the same.
+    typedef typename internal::Function<F>::Result Result;
+
+    // Asserts at compile time that F returns void.
+    static_assert(std::is_void<Result>::value, "Result type should be void.");
+
+    return Action<F>(new Impl<F>(action_));
+  }
+
+ private:
+  template <typename F>
+  class Impl : public ActionInterface<F> {
+   public:
+    typedef typename internal::Function<F>::Result Result;
+    typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
+
+    explicit Impl(const A& action) : action_(action) {}
+
+    void Perform(const ArgumentTuple& args) override {
+      // Performs the action and ignores its result.
+      action_.Perform(args);
+    }
+
+   private:
+    // Type OriginalFunction is the same as F except that its return
+    // type is IgnoredValue.
+    typedef typename internal::Function<F>::MakeResultIgnoredValue
+        OriginalFunction;
+
+    const Action<OriginalFunction> action_;
+  };
+
+  const A action_;
+};
+
+template <typename InnerAction, size_t... I>
+struct WithArgsAction {
+  InnerAction action;
+
+  // The inner action could be anything convertible to Action<X>.
+  // We use the conversion operator to detect the signature of the inner Action.
+  template <typename R, typename... Args>
+  operator Action<R(Args...)>() const {  // NOLINT
+    using TupleType = std::tuple<Args...>;
+    Action<R(typename std::tuple_element<I, TupleType>::type...)>
+        converted(action);
+
+    return [converted](Args... args) -> R {
+      return converted.Perform(std::forward_as_tuple(
+        std::get<I>(std::forward_as_tuple(std::forward<Args>(args)...))...));
+    };
+  }
+};
+
+template <typename... Actions>
+struct DoAllAction {
+ private:
+  template <typename T>
+  using NonFinalType =
+      typename std::conditional<std::is_scalar<T>::value, T, const T&>::type;
+
+  template <typename ActionT, size_t... I>
+  std::vector<ActionT> Convert(IndexSequence<I...>) const {
+    return {ActionT(std::get<I>(actions))...};
+  }
+
+ public:
+  std::tuple<Actions...> actions;
+
+  template <typename R, typename... Args>
+  operator Action<R(Args...)>() const {  // NOLINT
+    struct Op {
+      std::vector<Action<void(NonFinalType<Args>...)>> converted;
+      Action<R(Args...)> last;
+      R operator()(Args... args) const {
+        auto tuple_args = std::forward_as_tuple(std::forward<Args>(args)...);
+        for (auto& a : converted) {
+          a.Perform(tuple_args);
+        }
+        return last.Perform(std::move(tuple_args));
+      }
+    };
+    return Op{Convert<Action<void(NonFinalType<Args>...)>>(
+                  MakeIndexSequence<sizeof...(Actions) - 1>()),
+              std::get<sizeof...(Actions) - 1>(actions)};
+  }
+};
+
+template <typename T, typename... Params>
+struct ReturnNewAction {
+  T* operator()() const {
+    return internal::Apply(
+        [](const Params&... unpacked_params) {
+          return new T(unpacked_params...);
+        },
+        params);
+  }
+  std::tuple<Params...> params;
+};
+
+template <size_t k>
+struct ReturnArgAction {
+  template <typename... Args>
+  auto operator()(const Args&... args) const ->
+      typename std::tuple_element<k, std::tuple<Args...>>::type {
+    return std::get<k>(std::tie(args...));
+  }
+};
+
+template <size_t k, typename Ptr>
+struct SaveArgAction {
+  Ptr pointer;
+
+  template <typename... Args>
+  void operator()(const Args&... args) const {
+    *pointer = std::get<k>(std::tie(args...));
+  }
+};
+
+template <size_t k, typename Ptr>
+struct SaveArgPointeeAction {
+  Ptr pointer;
+
+  template <typename... Args>
+  void operator()(const Args&... args) const {
+    *pointer = *std::get<k>(std::tie(args...));
+  }
+};
+
+template <size_t k, typename T>
+struct SetArgRefereeAction {
+  T value;
+
+  template <typename... Args>
+  void operator()(Args&&... args) const {
+    using argk_type =
+        typename ::std::tuple_element<k, std::tuple<Args...>>::type;
+    static_assert(std::is_lvalue_reference<argk_type>::value,
+                  "Argument must be a reference type.");
+    std::get<k>(std::tie(args...)) = value;
+  }
+};
+
+template <size_t k, typename I1, typename I2>
+struct SetArrayArgumentAction {
+  I1 first;
+  I2 last;
+
+  template <typename... Args>
+  void operator()(const Args&... args) const {
+    auto value = std::get<k>(std::tie(args...));
+    for (auto it = first; it != last; ++it, (void)++value) {
+      *value = *it;
+    }
+  }
+};
+
+template <size_t k>
+struct DeleteArgAction {
+  template <typename... Args>
+  void operator()(const Args&... args) const {
+    delete std::get<k>(std::tie(args...));
+  }
+};
+
+template <typename Ptr>
+struct ReturnPointeeAction {
+  Ptr pointer;
+  template <typename... Args>
+  auto operator()(const Args&...) const -> decltype(*pointer) {
+    return *pointer;
+  }
+};
+
+#if GTEST_HAS_EXCEPTIONS
+template <typename T>
+struct ThrowAction {
+  T exception;
+  // We use a conversion operator to adapt to any return type.
+  template <typename R, typename... Args>
+  operator Action<R(Args...)>() const {  // NOLINT
+    T copy = exception;
+    return [copy](Args...) -> R { throw copy; };
+  }
+};
+#endif  // GTEST_HAS_EXCEPTIONS
+
+}  // namespace internal
+
+// An Unused object can be implicitly constructed from ANY value.
+// This is handy when defining actions that ignore some or all of the
+// mock function arguments.  For example, given
+//
+//   MOCK_METHOD3(Foo, double(const string& label, double x, double y));
+//   MOCK_METHOD3(Bar, double(int index, double x, double y));
+//
+// instead of
+//
+//   double DistanceToOriginWithLabel(const string& label, double x, double y) {
+//     return sqrt(x*x + y*y);
+//   }
+//   double DistanceToOriginWithIndex(int index, double x, double y) {
+//     return sqrt(x*x + y*y);
+//   }
+//   ...
+//   EXPECT_CALL(mock, Foo("abc", _, _))
+//       .WillOnce(Invoke(DistanceToOriginWithLabel));
+//   EXPECT_CALL(mock, Bar(5, _, _))
+//       .WillOnce(Invoke(DistanceToOriginWithIndex));
+//
+// you could write
+//
+//   // We can declare any uninteresting argument as Unused.
+//   double DistanceToOrigin(Unused, double x, double y) {
+//     return sqrt(x*x + y*y);
+//   }
+//   ...
+//   EXPECT_CALL(mock, Foo("abc", _, _)).WillOnce(Invoke(DistanceToOrigin));
+//   EXPECT_CALL(mock, Bar(5, _, _)).WillOnce(Invoke(DistanceToOrigin));
+typedef internal::IgnoredValue Unused;
+
+// Creates an action that does actions a1, a2, ..., sequentially in
+// each invocation. All but the last action will have a readonly view of the
+// arguments.
+template <typename... Action>
+internal::DoAllAction<typename std::decay<Action>::type...> DoAll(
+    Action&&... action) {
+  return {std::forward_as_tuple(std::forward<Action>(action)...)};
+}
+
+// WithArg<k>(an_action) creates an action that passes the k-th
+// (0-based) argument of the mock function to an_action and performs
+// it.  It adapts an action accepting one argument to one that accepts
+// multiple arguments.  For convenience, we also provide
+// WithArgs<k>(an_action) (defined below) as a synonym.
+template <size_t k, typename InnerAction>
+internal::WithArgsAction<typename std::decay<InnerAction>::type, k>
+WithArg(InnerAction&& action) {
+  return {std::forward<InnerAction>(action)};
+}
+
+// WithArgs<N1, N2, ..., Nk>(an_action) creates an action that passes
+// the selected arguments of the mock function to an_action and
+// performs it.  It serves as an adaptor between actions with
+// different argument lists.
+template <size_t k, size_t... ks, typename InnerAction>
+internal::WithArgsAction<typename std::decay<InnerAction>::type, k, ks...>
+WithArgs(InnerAction&& action) {
+  return {std::forward<InnerAction>(action)};
+}
+
+// WithoutArgs(inner_action) can be used in a mock function with a
+// non-empty argument list to perform inner_action, which takes no
+// argument.  In other words, it adapts an action accepting no
+// argument to one that accepts (and ignores) arguments.
+template <typename InnerAction>
+internal::WithArgsAction<typename std::decay<InnerAction>::type>
+WithoutArgs(InnerAction&& action) {
+  return {std::forward<InnerAction>(action)};
+}
+
+// Creates an action that returns 'value'.  'value' is passed by value
+// instead of const reference - otherwise Return("string literal")
+// will trigger a compiler error about using array as initializer.
+template <typename R>
+internal::ReturnAction<R> Return(R value) {
+  return internal::ReturnAction<R>(std::move(value));
+}
+
+// Creates an action that returns NULL.
+inline PolymorphicAction<internal::ReturnNullAction> ReturnNull() {
+  return MakePolymorphicAction(internal::ReturnNullAction());
+}
+
+// Creates an action that returns from a void function.
+inline PolymorphicAction<internal::ReturnVoidAction> Return() {
+  return MakePolymorphicAction(internal::ReturnVoidAction());
+}
+
+// Creates an action that returns the reference to a variable.
+template <typename R>
+inline internal::ReturnRefAction<R> ReturnRef(R& x) {  // NOLINT
+  return internal::ReturnRefAction<R>(x);
+}
+
+// Prevent using ReturnRef on reference to temporary.
+template <typename R, R* = nullptr>
+internal::ReturnRefAction<R> ReturnRef(R&&) = delete;
+
+// Creates an action that returns the reference to a copy of the
+// argument.  The copy is created when the action is constructed and
+// lives as long as the action.
+template <typename R>
+inline internal::ReturnRefOfCopyAction<R> ReturnRefOfCopy(const R& x) {
+  return internal::ReturnRefOfCopyAction<R>(x);
+}
+
+// Modifies the parent action (a Return() action) to perform a move of the
+// argument instead of a copy.
+// Return(ByMove()) actions can only be executed once and will assert this
+// invariant.
+template <typename R>
+internal::ByMoveWrapper<R> ByMove(R x) {
+  return internal::ByMoveWrapper<R>(std::move(x));
+}
+
+// Creates an action that returns an element of `vals`. Calling this action will
+// repeatedly return the next value from `vals` until it reaches the end and
+// will restart from the beginning.
+template <typename T>
+internal::ReturnRoundRobinAction<T> ReturnRoundRobin(std::vector<T> vals) {
+  return internal::ReturnRoundRobinAction<T>(std::move(vals));
+}
+
+// Creates an action that returns an element of `vals`. Calling this action will
+// repeatedly return the next value from `vals` until it reaches the end and
+// will restart from the beginning.
+template <typename T>
+internal::ReturnRoundRobinAction<T> ReturnRoundRobin(
+    std::initializer_list<T> vals) {
+  return internal::ReturnRoundRobinAction<T>(std::vector<T>(vals));
+}
+
+// Creates an action that does the default action for the give mock function.
+inline internal::DoDefaultAction DoDefault() {
+  return internal::DoDefaultAction();
+}
+
+// Creates an action that sets the variable pointed by the N-th
+// (0-based) function argument to 'value'.
+template <size_t N, typename T>
+internal::SetArgumentPointeeAction<N, T> SetArgPointee(T value) {
+  return {std::move(value)};
+}
+
+// The following version is DEPRECATED.
+template <size_t N, typename T>
+internal::SetArgumentPointeeAction<N, T> SetArgumentPointee(T value) {
+  return {std::move(value)};
+}
+
+// Creates an action that sets a pointer referent to a given value.
+template <typename T1, typename T2>
+PolymorphicAction<internal::AssignAction<T1, T2> > Assign(T1* ptr, T2 val) {
+  return MakePolymorphicAction(internal::AssignAction<T1, T2>(ptr, val));
+}
+
+#if !GTEST_OS_WINDOWS_MOBILE
+
+// Creates an action that sets errno and returns the appropriate error.
+template <typename T>
+PolymorphicAction<internal::SetErrnoAndReturnAction<T> >
+SetErrnoAndReturn(int errval, T result) {
+  return MakePolymorphicAction(
+      internal::SetErrnoAndReturnAction<T>(errval, result));
+}
+
+#endif  // !GTEST_OS_WINDOWS_MOBILE
+
+// Various overloads for Invoke().
+
+// Legacy function.
+// Actions can now be implicitly constructed from callables. No need to create
+// wrapper objects.
+// This function exists for backwards compatibility.
+template <typename FunctionImpl>
+typename std::decay<FunctionImpl>::type Invoke(FunctionImpl&& function_impl) {
+  return std::forward<FunctionImpl>(function_impl);
+}
+
+// Creates an action that invokes the given method on the given object
+// with the mock function's arguments.
+template <class Class, typename MethodPtr>
+internal::InvokeMethodAction<Class, MethodPtr> Invoke(Class* obj_ptr,
+                                                      MethodPtr method_ptr) {
+  return {obj_ptr, method_ptr};
+}
+
+// Creates an action that invokes 'function_impl' with no argument.
+template <typename FunctionImpl>
+internal::InvokeWithoutArgsAction<typename std::decay<FunctionImpl>::type>
+InvokeWithoutArgs(FunctionImpl function_impl) {
+  return {std::move(function_impl)};
+}
+
+// Creates an action that invokes the given method on the given object
+// with no argument.
+template <class Class, typename MethodPtr>
+internal::InvokeMethodWithoutArgsAction<Class, MethodPtr> InvokeWithoutArgs(
+    Class* obj_ptr, MethodPtr method_ptr) {
+  return {obj_ptr, method_ptr};
+}
+
+// Creates an action that performs an_action and throws away its
+// result.  In other words, it changes the return type of an_action to
+// void.  an_action MUST NOT return void, or the code won't compile.
+template <typename A>
+inline internal::IgnoreResultAction<A> IgnoreResult(const A& an_action) {
+  return internal::IgnoreResultAction<A>(an_action);
+}
+
+// Creates a reference wrapper for the given L-value.  If necessary,
+// you can explicitly specify the type of the reference.  For example,
+// suppose 'derived' is an object of type Derived, ByRef(derived)
+// would wrap a Derived&.  If you want to wrap a const Base& instead,
+// where Base is a base class of Derived, just write:
+//
+//   ByRef<const Base>(derived)
+//
+// N.B. ByRef is redundant with std::ref, std::cref and std::reference_wrapper.
+// However, it may still be used for consistency with ByMove().
+template <typename T>
+inline ::std::reference_wrapper<T> ByRef(T& l_value) {  // NOLINT
+  return ::std::reference_wrapper<T>(l_value);
+}
+
+// The ReturnNew<T>(a1, a2, ..., a_k) action returns a pointer to a new
+// instance of type T, constructed on the heap with constructor arguments
+// a1, a2, ..., and a_k. The caller assumes ownership of the returned value.
+template <typename T, typename... Params>
+internal::ReturnNewAction<T, typename std::decay<Params>::type...> ReturnNew(
+    Params&&... params) {
+  return {std::forward_as_tuple(std::forward<Params>(params)...)};
+}
+
+// Action ReturnArg<k>() returns the k-th argument of the mock function.
+template <size_t k>
+internal::ReturnArgAction<k> ReturnArg() {
+  return {};
+}
+
+// Action SaveArg<k>(pointer) saves the k-th (0-based) argument of the
+// mock function to *pointer.
+template <size_t k, typename Ptr>
+internal::SaveArgAction<k, Ptr> SaveArg(Ptr pointer) {
+  return {pointer};
+}
+
+// Action SaveArgPointee<k>(pointer) saves the value pointed to
+// by the k-th (0-based) argument of the mock function to *pointer.
+template <size_t k, typename Ptr>
+internal::SaveArgPointeeAction<k, Ptr> SaveArgPointee(Ptr pointer) {
+  return {pointer};
+}
+
+// Action SetArgReferee<k>(value) assigns 'value' to the variable
+// referenced by the k-th (0-based) argument of the mock function.
+template <size_t k, typename T>
+internal::SetArgRefereeAction<k, typename std::decay<T>::type> SetArgReferee(
+    T&& value) {
+  return {std::forward<T>(value)};
+}
+
+// Action SetArrayArgument<k>(first, last) copies the elements in
+// source range [first, last) to the array pointed to by the k-th
+// (0-based) argument, which can be either a pointer or an
+// iterator. The action does not take ownership of the elements in the
+// source range.
+template <size_t k, typename I1, typename I2>
+internal::SetArrayArgumentAction<k, I1, I2> SetArrayArgument(I1 first,
+                                                             I2 last) {
+  return {first, last};
+}
+
+// Action DeleteArg<k>() deletes the k-th (0-based) argument of the mock
+// function.
+template <size_t k>
+internal::DeleteArgAction<k> DeleteArg() {
+  return {};
+}
+
+// This action returns the value pointed to by 'pointer'.
+template <typename Ptr>
+internal::ReturnPointeeAction<Ptr> ReturnPointee(Ptr pointer) {
+  return {pointer};
+}
+
+// Action Throw(exception) can be used in a mock function of any type
+// to throw the given exception.  Any copyable value can be thrown.
+#if GTEST_HAS_EXCEPTIONS
+template <typename T>
+internal::ThrowAction<typename std::decay<T>::type> Throw(T&& exception) {
+  return {std::forward<T>(exception)};
+}
+#endif  // GTEST_HAS_EXCEPTIONS
+
+namespace internal {
+
+// A macro from the ACTION* family (defined later in gmock-generated-actions.h)
+// defines an action that can be used in a mock function.  Typically,
+// these actions only care about a subset of the arguments of the mock
+// function.  For example, if such an action only uses the second
+// argument, it can be used in any mock function that takes >= 2
+// arguments where the type of the second argument is compatible.
+//
+// Therefore, the action implementation must be prepared to take more
+// arguments than it needs.  The ExcessiveArg type is used to
+// represent those excessive arguments.  In order to keep the compiler
+// error messages tractable, we define it in the testing namespace
+// instead of testing::internal.  However, this is an INTERNAL TYPE
+// and subject to change without notice, so a user MUST NOT USE THIS
+// TYPE DIRECTLY.
+struct ExcessiveArg {};
+
+// Builds an implementation of an Action<> for some particular signature, using
+// a class defined by an ACTION* macro.
+template <typename F, typename Impl> struct ActionImpl;
+
+template <typename Impl>
+struct ImplBase {
+  struct Holder {
+    // Allows each copy of the Action<> to get to the Impl.
+    explicit operator const Impl&() const { return *ptr; }
+    std::shared_ptr<Impl> ptr;
+  };
+  using type = typename std::conditional<std::is_constructible<Impl>::value,
+                                         Impl, Holder>::type;
+};
+
+template <typename R, typename... Args, typename Impl>
+struct ActionImpl<R(Args...), Impl> : ImplBase<Impl>::type {
+  using Base = typename ImplBase<Impl>::type;
+  using function_type = R(Args...);
+  using args_type = std::tuple<Args...>;
+
+  ActionImpl() = default;  // Only defined if appropriate for Base.
+  explicit ActionImpl(std::shared_ptr<Impl> impl) : Base{std::move(impl)} { }
+
+  R operator()(Args&&... arg) const {
+    static constexpr size_t kMaxArgs =
+        sizeof...(Args) <= 10 ? sizeof...(Args) : 10;
+    return Apply(MakeIndexSequence<kMaxArgs>{},
+                 MakeIndexSequence<10 - kMaxArgs>{},
+                 args_type{std::forward<Args>(arg)...});
+  }
+
+  template <std::size_t... arg_id, std::size_t... excess_id>
+  R Apply(IndexSequence<arg_id...>, IndexSequence<excess_id...>,
+          const args_type& args) const {
+    // Impl need not be specific to the signature of action being implemented;
+    // only the implementing function body needs to have all of the specific
+    // types instantiated.  Up to 10 of the args that are provided by the
+    // args_type get passed, followed by a dummy of unspecified type for the
+    // remainder up to 10 explicit args.
+    static constexpr ExcessiveArg kExcessArg{};
+    return static_cast<const Impl&>(*this).template gmock_PerformImpl<
+        /*function_type=*/function_type, /*return_type=*/R,
+        /*args_type=*/args_type,
+        /*argN_type=*/typename std::tuple_element<arg_id, args_type>::type...>(
+        /*args=*/args, std::get<arg_id>(args)...,
+        ((void)excess_id, kExcessArg)...);
+  }
+};
+
+// Stores a default-constructed Impl as part of the Action<>'s
+// std::function<>. The Impl should be trivial to copy.
+template <typename F, typename Impl>
+::testing::Action<F> MakeAction() {
+  return ::testing::Action<F>(ActionImpl<F, Impl>());
+}
+
+// Stores just the one given instance of Impl.
+template <typename F, typename Impl>
+::testing::Action<F> MakeAction(std::shared_ptr<Impl> impl) {
+  return ::testing::Action<F>(ActionImpl<F, Impl>(std::move(impl)));
+}
+
+#define GMOCK_INTERNAL_ARG_UNUSED(i, data, el) \
+  , const arg##i##_type& arg##i GTEST_ATTRIBUTE_UNUSED_
+#define GMOCK_ACTION_ARG_TYPES_AND_NAMES_UNUSED_           \
+  const args_type& args GTEST_ATTRIBUTE_UNUSED_ GMOCK_PP_REPEAT( \
+      GMOCK_INTERNAL_ARG_UNUSED, , 10)
+
+#define GMOCK_INTERNAL_ARG(i, data, el) , const arg##i##_type& arg##i
+#define GMOCK_ACTION_ARG_TYPES_AND_NAMES_ \
+  const args_type& args GMOCK_PP_REPEAT(GMOCK_INTERNAL_ARG, , 10)
+
+#define GMOCK_INTERNAL_TEMPLATE_ARG(i, data, el) , typename arg##i##_type
+#define GMOCK_ACTION_TEMPLATE_ARGS_NAMES_ \
+  GMOCK_PP_TAIL(GMOCK_PP_REPEAT(GMOCK_INTERNAL_TEMPLATE_ARG, , 10))
+
+#define GMOCK_INTERNAL_TYPENAME_PARAM(i, data, param) , typename param##_type
+#define GMOCK_ACTION_TYPENAME_PARAMS_(params) \
+  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_TYPENAME_PARAM, , params))
+
+#define GMOCK_INTERNAL_TYPE_PARAM(i, data, param) , param##_type
+#define GMOCK_ACTION_TYPE_PARAMS_(params) \
+  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_TYPE_PARAM, , params))
+
+#define GMOCK_INTERNAL_TYPE_GVALUE_PARAM(i, data, param) \
+  , param##_type gmock_p##i
+#define GMOCK_ACTION_TYPE_GVALUE_PARAMS_(params) \
+  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_TYPE_GVALUE_PARAM, , params))
+
+#define GMOCK_INTERNAL_GVALUE_PARAM(i, data, param) \
+  , std::forward<param##_type>(gmock_p##i)
+#define GMOCK_ACTION_GVALUE_PARAMS_(params) \
+  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_GVALUE_PARAM, , params))
+
+#define GMOCK_INTERNAL_INIT_PARAM(i, data, param) \
+  , param(::std::forward<param##_type>(gmock_p##i))
+#define GMOCK_ACTION_INIT_PARAMS_(params) \
+  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_INIT_PARAM, , params))
+
+#define GMOCK_INTERNAL_FIELD_PARAM(i, data, param) param##_type param;
+#define GMOCK_ACTION_FIELD_PARAMS_(params) \
+  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_FIELD_PARAM, , params)
+
+#define GMOCK_INTERNAL_ACTION(name, full_name, params)                        \
+  template <GMOCK_ACTION_TYPENAME_PARAMS_(params)>                            \
+  class full_name {                                                           \
+   public:                                                                    \
+    explicit full_name(GMOCK_ACTION_TYPE_GVALUE_PARAMS_(params))              \
+        : impl_(std::make_shared<gmock_Impl>(                                 \
+                GMOCK_ACTION_GVALUE_PARAMS_(params))) { }                     \
+    full_name(const full_name&) = default;                                    \
+    full_name(full_name&&) noexcept = default;                                \
+    template <typename F>                                                     \
+    operator ::testing::Action<F>() const {                                   \
+      return ::testing::internal::MakeAction<F>(impl_);                       \
+    }                                                                         \
+   private:                                                                   \
+    class gmock_Impl {                                                        \
+     public:                                                                  \
+      explicit gmock_Impl(GMOCK_ACTION_TYPE_GVALUE_PARAMS_(params))           \
+          : GMOCK_ACTION_INIT_PARAMS_(params) {}                              \
+      template <typename function_type, typename return_type,                 \
+                typename args_type, GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>        \
+      return_type gmock_PerformImpl(GMOCK_ACTION_ARG_TYPES_AND_NAMES_) const; \
+      GMOCK_ACTION_FIELD_PARAMS_(params)                                      \
+    };                                                                        \
+    std::shared_ptr<const gmock_Impl> impl_;                                  \
+  };                                                                          \
+  template <GMOCK_ACTION_TYPENAME_PARAMS_(params)>                            \
+  inline full_name<GMOCK_ACTION_TYPE_PARAMS_(params)> name(                   \
+      GMOCK_ACTION_TYPE_GVALUE_PARAMS_(params)) {                             \
+    return full_name<GMOCK_ACTION_TYPE_PARAMS_(params)>(                      \
+        GMOCK_ACTION_GVALUE_PARAMS_(params));                                 \
+  }                                                                           \
+  template <GMOCK_ACTION_TYPENAME_PARAMS_(params)>                            \
+  template <typename function_type, typename return_type, typename args_type, \
+            GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>                                \
+  return_type full_name<GMOCK_ACTION_TYPE_PARAMS_(params)>::gmock_Impl::      \
+  gmock_PerformImpl(GMOCK_ACTION_ARG_TYPES_AND_NAMES_UNUSED_) const
+
+}  // namespace internal
+
+// Similar to GMOCK_INTERNAL_ACTION, but no bound parameters are stored.
+#define ACTION(name)                                                          \
+  class name##Action {                                                        \
+   public:                                                                    \
+   explicit name##Action() noexcept {}                                        \
+   name##Action(const name##Action&) noexcept {}                              \
+    template <typename F>                                                     \
+    operator ::testing::Action<F>() const {                                   \
+      return ::testing::internal::MakeAction<F, gmock_Impl>();                \
+    }                                                                         \
+   private:                                                                   \
+    class gmock_Impl {                                                        \
+     public:                                                                  \
+      template <typename function_type, typename return_type,                 \
+                typename args_type, GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>        \
+      return_type gmock_PerformImpl(GMOCK_ACTION_ARG_TYPES_AND_NAMES_) const; \
+    };                                                                        \
+  };                                                                          \
+  inline name##Action name() GTEST_MUST_USE_RESULT_;                          \
+  inline name##Action name() { return name##Action(); }                       \
+  template <typename function_type, typename return_type, typename args_type, \
+            GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>                                \
+  return_type name##Action::gmock_Impl::gmock_PerformImpl(                    \
+      GMOCK_ACTION_ARG_TYPES_AND_NAMES_UNUSED_) const
+
+#define ACTION_P(name, ...) \
+  GMOCK_INTERNAL_ACTION(name, name##ActionP, (__VA_ARGS__))
+
+#define ACTION_P2(name, ...) \
+  GMOCK_INTERNAL_ACTION(name, name##ActionP2, (__VA_ARGS__))
+
+#define ACTION_P3(name, ...) \
+  GMOCK_INTERNAL_ACTION(name, name##ActionP3, (__VA_ARGS__))
+
+#define ACTION_P4(name, ...) \
+  GMOCK_INTERNAL_ACTION(name, name##ActionP4, (__VA_ARGS__))
+
+#define ACTION_P5(name, ...) \
+  GMOCK_INTERNAL_ACTION(name, name##ActionP5, (__VA_ARGS__))
+
+#define ACTION_P6(name, ...) \
+  GMOCK_INTERNAL_ACTION(name, name##ActionP6, (__VA_ARGS__))
+
+#define ACTION_P7(name, ...) \
+  GMOCK_INTERNAL_ACTION(name, name##ActionP7, (__VA_ARGS__))
+
+#define ACTION_P8(name, ...) \
+  GMOCK_INTERNAL_ACTION(name, name##ActionP8, (__VA_ARGS__))
+
+#define ACTION_P9(name, ...) \
+  GMOCK_INTERNAL_ACTION(name, name##ActionP9, (__VA_ARGS__))
+
+#define ACTION_P10(name, ...) \
+  GMOCK_INTERNAL_ACTION(name, name##ActionP10, (__VA_ARGS__))
+
+}  // namespace testing
+
+#ifdef _MSC_VER
+# pragma warning(pop)
+#endif
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// This file implements some commonly used cardinalities.  More
+// cardinalities can be defined by the user implementing the
+// CardinalityInterface interface if necessary.
+
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
+
+#include <limits.h>
+#include <memory>
+#include <ostream>  // NOLINT
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
+/* class A needs to have dll-interface to be used by clients of class B */)
+
+namespace testing {
+
+// To implement a cardinality Foo, define:
+//   1. a class FooCardinality that implements the
+//      CardinalityInterface interface, and
+//   2. a factory function that creates a Cardinality object from a
+//      const FooCardinality*.
+//
+// The two-level delegation design follows that of Matcher, providing
+// consistency for extension developers.  It also eases ownership
+// management as Cardinality objects can now be copied like plain values.
+
+// The implementation of a cardinality.
+class CardinalityInterface {
+ public:
+  virtual ~CardinalityInterface() {}
+
+  // Conservative estimate on the lower/upper bound of the number of
+  // calls allowed.
+  virtual int ConservativeLowerBound() const { return 0; }
+  virtual int ConservativeUpperBound() const { return INT_MAX; }
+
+  // Returns true if and only if call_count calls will satisfy this
+  // cardinality.
+  virtual bool IsSatisfiedByCallCount(int call_count) const = 0;
+
+  // Returns true if and only if call_count calls will saturate this
+  // cardinality.
+  virtual bool IsSaturatedByCallCount(int call_count) const = 0;
+
+  // Describes self to an ostream.
+  virtual void DescribeTo(::std::ostream* os) const = 0;
+};
+
+// A Cardinality is a copyable and IMMUTABLE (except by assignment)
+// object that specifies how many times a mock function is expected to
+// be called.  The implementation of Cardinality is just a std::shared_ptr
+// to const CardinalityInterface. Don't inherit from Cardinality!
+class GTEST_API_ Cardinality {
+ public:
+  // Constructs a null cardinality.  Needed for storing Cardinality
+  // objects in STL containers.
+  Cardinality() {}
+
+  // Constructs a Cardinality from its implementation.
+  explicit Cardinality(const CardinalityInterface* impl) : impl_(impl) {}
+
+  // Conservative estimate on the lower/upper bound of the number of
+  // calls allowed.
+  int ConservativeLowerBound() const { return impl_->ConservativeLowerBound(); }
+  int ConservativeUpperBound() const { return impl_->ConservativeUpperBound(); }
+
+  // Returns true if and only if call_count calls will satisfy this
+  // cardinality.
+  bool IsSatisfiedByCallCount(int call_count) const {
+    return impl_->IsSatisfiedByCallCount(call_count);
+  }
+
+  // Returns true if and only if call_count calls will saturate this
+  // cardinality.
+  bool IsSaturatedByCallCount(int call_count) const {
+    return impl_->IsSaturatedByCallCount(call_count);
+  }
+
+  // Returns true if and only if call_count calls will over-saturate this
+  // cardinality, i.e. exceed the maximum number of allowed calls.
+  bool IsOverSaturatedByCallCount(int call_count) const {
+    return impl_->IsSaturatedByCallCount(call_count) &&
+        !impl_->IsSatisfiedByCallCount(call_count);
+  }
+
+  // Describes self to an ostream
+  void DescribeTo(::std::ostream* os) const { impl_->DescribeTo(os); }
+
+  // Describes the given actual call count to an ostream.
+  static void DescribeActualCallCountTo(int actual_call_count,
+                                        ::std::ostream* os);
+
+ private:
+  std::shared_ptr<const CardinalityInterface> impl_;
+};
+
+// Creates a cardinality that allows at least n calls.
+GTEST_API_ Cardinality AtLeast(int n);
+
+// Creates a cardinality that allows at most n calls.
+GTEST_API_ Cardinality AtMost(int n);
+
+// Creates a cardinality that allows any number of calls.
+GTEST_API_ Cardinality AnyNumber();
+
+// Creates a cardinality that allows between min and max calls.
+GTEST_API_ Cardinality Between(int min, int max);
+
+// Creates a cardinality that allows exactly n calls.
+GTEST_API_ Cardinality Exactly(int n);
+
+// Creates a cardinality from its implementation.
+inline Cardinality MakeCardinality(const CardinalityInterface* c) {
+  return Cardinality(c);
+}
+
+}  // namespace testing
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// This file implements MOCK_METHOD.
+
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_FUNCTION_MOCKER_H_  // NOLINT
+#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_FUNCTION_MOCKER_H_  // NOLINT
+
+#include <type_traits>  // IWYU pragma: keep
+#include <utility>      // IWYU pragma: keep
+
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// This file implements the ON_CALL() and EXPECT_CALL() macros.
+//
+// A user can use the ON_CALL() macro to specify the default action of
+// a mock method.  The syntax is:
+//
+//   ON_CALL(mock_object, Method(argument-matchers))
+//       .With(multi-argument-matcher)
+//       .WillByDefault(action);
+//
+//  where the .With() clause is optional.
+//
+// A user can use the EXPECT_CALL() macro to specify an expectation on
+// a mock method.  The syntax is:
+//
+//   EXPECT_CALL(mock_object, Method(argument-matchers))
+//       .With(multi-argument-matchers)
+//       .Times(cardinality)
+//       .InSequence(sequences)
+//       .After(expectations)
+//       .WillOnce(action)
+//       .WillRepeatedly(action)
+//       .RetiresOnSaturation();
+//
+// where all clauses are optional, and .InSequence()/.After()/
+// .WillOnce() can appear any number of times.
+
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_
+
+#include <functional>
+#include <map>
+#include <memory>
+#include <set>
+#include <sstream>
+#include <string>
+#include <type_traits>
+#include <utility>
+#include <vector>
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// The MATCHER* family of macros can be used in a namespace scope to
+// define custom matchers easily.
+//
+// Basic Usage
+// ===========
+//
+// The syntax
+//
+//   MATCHER(name, description_string) { statements; }
+//
+// defines a matcher with the given name that executes the statements,
+// which must return a bool to indicate if the match succeeds.  Inside
+// the statements, you can refer to the value being matched by 'arg',
+// and refer to its type by 'arg_type'.
+//
+// The description string documents what the matcher does, and is used
+// to generate the failure message when the match fails.  Since a
+// MATCHER() is usually defined in a header file shared by multiple
+// C++ source files, we require the description to be a C-string
+// literal to avoid possible side effects.  It can be empty, in which
+// case we'll use the sequence of words in the matcher name as the
+// description.
+//
+// For example:
+//
+//   MATCHER(IsEven, "") { return (arg % 2) == 0; }
+//
+// allows you to write
+//
+//   // Expects mock_foo.Bar(n) to be called where n is even.
+//   EXPECT_CALL(mock_foo, Bar(IsEven()));
+//
+// or,
+//
+//   // Verifies that the value of some_expression is even.
+//   EXPECT_THAT(some_expression, IsEven());
+//
+// If the above assertion fails, it will print something like:
+//
+//   Value of: some_expression
+//   Expected: is even
+//     Actual: 7
+//
+// where the description "is even" is automatically calculated from the
+// matcher name IsEven.
+//
+// Argument Type
+// =============
+//
+// Note that the type of the value being matched (arg_type) is
+// determined by the context in which you use the matcher and is
+// supplied to you by the compiler, so you don't need to worry about
+// declaring it (nor can you).  This allows the matcher to be
+// polymorphic.  For example, IsEven() can be used to match any type
+// where the value of "(arg % 2) == 0" can be implicitly converted to
+// a bool.  In the "Bar(IsEven())" example above, if method Bar()
+// takes an int, 'arg_type' will be int; if it takes an unsigned long,
+// 'arg_type' will be unsigned long; and so on.
+//
+// Parameterizing Matchers
+// =======================
+//
+// Sometimes you'll want to parameterize the matcher.  For that you
+// can use another macro:
+//
+//   MATCHER_P(name, param_name, description_string) { statements; }
+//
+// For example:
+//
+//   MATCHER_P(HasAbsoluteValue, value, "") { return abs(arg) == value; }
+//
+// will allow you to write:
+//
+//   EXPECT_THAT(Blah("a"), HasAbsoluteValue(n));
+//
+// which may lead to this message (assuming n is 10):
+//
+//   Value of: Blah("a")
+//   Expected: has absolute value 10
+//     Actual: -9
+//
+// Note that both the matcher description and its parameter are
+// printed, making the message human-friendly.
+//
+// In the matcher definition body, you can write 'foo_type' to
+// reference the type of a parameter named 'foo'.  For example, in the
+// body of MATCHER_P(HasAbsoluteValue, value) above, you can write
+// 'value_type' to refer to the type of 'value'.
+//
+// We also provide MATCHER_P2, MATCHER_P3, ..., up to MATCHER_P$n to
+// support multi-parameter matchers.
+//
+// Describing Parameterized Matchers
+// =================================
+//
+// The last argument to MATCHER*() is a string-typed expression.  The
+// expression can reference all of the matcher's parameters and a
+// special bool-typed variable named 'negation'.  When 'negation' is
+// false, the expression should evaluate to the matcher's description;
+// otherwise it should evaluate to the description of the negation of
+// the matcher.  For example,
+//
+//   using testing::PrintToString;
+//
+//   MATCHER_P2(InClosedRange, low, hi,
+//       std::string(negation ? "is not" : "is") + " in range [" +
+//       PrintToString(low) + ", " + PrintToString(hi) + "]") {
+//     return low <= arg && arg <= hi;
+//   }
+//   ...
+//   EXPECT_THAT(3, InClosedRange(4, 6));
+//   EXPECT_THAT(3, Not(InClosedRange(2, 4)));
+//
+// would generate two failures that contain the text:
+//
+//   Expected: is in range [4, 6]
+//   ...
+//   Expected: is not in range [2, 4]
+//
+// If you specify "" as the description, the failure message will
+// contain the sequence of words in the matcher name followed by the
+// parameter values printed as a tuple.  For example,
+//
+//   MATCHER_P2(InClosedRange, low, hi, "") { ... }
+//   ...
+//   EXPECT_THAT(3, InClosedRange(4, 6));
+//   EXPECT_THAT(3, Not(InClosedRange(2, 4)));
+//
+// would generate two failures that contain the text:
+//
+//   Expected: in closed range (4, 6)
+//   ...
+//   Expected: not (in closed range (2, 4))
+//
+// Types of Matcher Parameters
+// ===========================
+//
+// For the purpose of typing, you can view
+//
+//   MATCHER_Pk(Foo, p1, ..., pk, description_string) { ... }
+//
+// as shorthand for
+//
+//   template <typename p1_type, ..., typename pk_type>
+//   FooMatcherPk<p1_type, ..., pk_type>
+//   Foo(p1_type p1, ..., pk_type pk) { ... }
+//
+// When you write Foo(v1, ..., vk), the compiler infers the types of
+// the parameters v1, ..., and vk for you.  If you are not happy with
+// the result of the type inference, you can specify the types by
+// explicitly instantiating the template, as in Foo<long, bool>(5,
+// false).  As said earlier, you don't get to (or need to) specify
+// 'arg_type' as that's determined by the context in which the matcher
+// is used.  You can assign the result of expression Foo(p1, ..., pk)
+// to a variable of type FooMatcherPk<p1_type, ..., pk_type>.  This
+// can be useful when composing matchers.
+//
+// While you can instantiate a matcher template with reference types,
+// passing the parameters by pointer usually makes your code more
+// readable.  If, however, you still want to pass a parameter by
+// reference, be aware that in the failure message generated by the
+// matcher you will see the value of the referenced object but not its
+// address.
+//
+// Explaining Match Results
+// ========================
+//
+// Sometimes the matcher description alone isn't enough to explain why
+// the match has failed or succeeded.  For example, when expecting a
+// long string, it can be very helpful to also print the diff between
+// the expected string and the actual one.  To achieve that, you can
+// optionally stream additional information to a special variable
+// named result_listener, whose type is a pointer to class
+// MatchResultListener:
+//
+//   MATCHER_P(EqualsLongString, str, "") {
+//     if (arg == str) return true;
+//
+//     *result_listener << "the difference: "
+///                     << DiffStrings(str, arg);
+//     return false;
+//   }
+//
+// Overloading Matchers
+// ====================
+//
+// You can overload matchers with different numbers of parameters:
+//
+//   MATCHER_P(Blah, a, description_string1) { ... }
+//   MATCHER_P2(Blah, a, b, description_string2) { ... }
+//
+// Caveats
+// =======
+//
+// When defining a new matcher, you should also consider implementing
+// MatcherInterface or using MakePolymorphicMatcher().  These
+// approaches require more work than the MATCHER* macros, but also
+// give you more control on the types of the value being matched and
+// the matcher parameters, which may leads to better compiler error
+// messages when the matcher is used wrong.  They also allow
+// overloading matchers based on parameter types (as opposed to just
+// based on the number of parameters).
+//
+// MATCHER*() can only be used in a namespace scope as templates cannot be
+// declared inside of a local class.
+//
+// More Information
+// ================
+//
+// To learn more about using these macros, please search for 'MATCHER'
+// on
+// https://github.com/google/googletest/blob/master/docs/gmock_cook_book.md
+//
+// This file also implements some commonly used argument matchers.  More
+// matchers can be defined by the user implementing the
+// MatcherInterface<T> interface if necessary.
+//
+// See googletest/include/gtest/gtest-matchers.h for the definition of class
+// Matcher, class MatcherInterface, and others.
+
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_
+
+#include <algorithm>
+#include <cmath>
+#include <initializer_list>
+#include <iterator>
+#include <limits>
+#include <memory>
+#include <ostream>  // NOLINT
+#include <sstream>
+#include <string>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+
+// MSVC warning C5046 is new as of VS2017 version 15.8.
+#if defined(_MSC_VER) && _MSC_VER >= 1915
+#define GMOCK_MAYBE_5046_ 5046
+#else
+#define GMOCK_MAYBE_5046_
+#endif
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(
+    4251 GMOCK_MAYBE_5046_ /* class A needs to have dll-interface to be used by
+                              clients of class B */
+    /* Symbol involving type with internal linkage not defined */)
+
+namespace testing {
+
+// To implement a matcher Foo for type T, define:
+//   1. a class FooMatcherImpl that implements the
+//      MatcherInterface<T> interface, and
+//   2. a factory function that creates a Matcher<T> object from a
+//      FooMatcherImpl*.
+//
+// The two-level delegation design makes it possible to allow a user
+// to write "v" instead of "Eq(v)" where a Matcher is expected, which
+// is impossible if we pass matchers by pointers.  It also eases
+// ownership management as Matcher objects can now be copied like
+// plain values.
+
+// A match result listener that stores the explanation in a string.
+class StringMatchResultListener : public MatchResultListener {
+ public:
+  StringMatchResultListener() : MatchResultListener(&ss_) {}
+
+  // Returns the explanation accumulated so far.
+  std::string str() const { return ss_.str(); }
+
+  // Clears the explanation accumulated so far.
+  void Clear() { ss_.str(""); }
+
+ private:
+  ::std::stringstream ss_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(StringMatchResultListener);
+};
+
+// Anything inside the 'internal' namespace IS INTERNAL IMPLEMENTATION
+// and MUST NOT BE USED IN USER CODE!!!
+namespace internal {
+
+// The MatcherCastImpl class template is a helper for implementing
+// MatcherCast().  We need this helper in order to partially
+// specialize the implementation of MatcherCast() (C++ allows
+// class/struct templates to be partially specialized, but not
+// function templates.).
+
+// This general version is used when MatcherCast()'s argument is a
+// polymorphic matcher (i.e. something that can be converted to a
+// Matcher but is not one yet; for example, Eq(value)) or a value (for
+// example, "hello").
+template <typename T, typename M>
+class MatcherCastImpl {
+ public:
+  static Matcher<T> Cast(const M& polymorphic_matcher_or_value) {
+    // M can be a polymorphic matcher, in which case we want to use
+    // its conversion operator to create Matcher<T>.  Or it can be a value
+    // that should be passed to the Matcher<T>'s constructor.
+    //
+    // We can't call Matcher<T>(polymorphic_matcher_or_value) when M is a
+    // polymorphic matcher because it'll be ambiguous if T has an implicit
+    // constructor from M (this usually happens when T has an implicit
+    // constructor from any type).
+    //
+    // It won't work to unconditionally implicit_cast
+    // polymorphic_matcher_or_value to Matcher<T> because it won't trigger
+    // a user-defined conversion from M to T if one exists (assuming M is
+    // a value).
+    return CastImpl(polymorphic_matcher_or_value,
+                    std::is_convertible<M, Matcher<T>>{},
+                    std::is_convertible<M, T>{});
+  }
+
+ private:
+  template <bool Ignore>
+  static Matcher<T> CastImpl(const M& polymorphic_matcher_or_value,
+                             std::true_type /* convertible_to_matcher */,
+                             std::integral_constant<bool, Ignore>) {
+    // M is implicitly convertible to Matcher<T>, which means that either
+    // M is a polymorphic matcher or Matcher<T> has an implicit constructor
+    // from M.  In both cases using the implicit conversion will produce a
+    // matcher.
+    //
+    // Even if T has an implicit constructor from M, it won't be called because
+    // creating Matcher<T> would require a chain of two user-defined conversions
+    // (first to create T from M and then to create Matcher<T> from T).
+    return polymorphic_matcher_or_value;
+  }
+
+  // M can't be implicitly converted to Matcher<T>, so M isn't a polymorphic
+  // matcher. It's a value of a type implicitly convertible to T. Use direct
+  // initialization to create a matcher.
+  static Matcher<T> CastImpl(const M& value,
+                             std::false_type /* convertible_to_matcher */,
+                             std::true_type /* convertible_to_T */) {
+    return Matcher<T>(ImplicitCast_<T>(value));
+  }
+
+  // M can't be implicitly converted to either Matcher<T> or T. Attempt to use
+  // polymorphic matcher Eq(value) in this case.
+  //
+  // Note that we first attempt to perform an implicit cast on the value and
+  // only fall back to the polymorphic Eq() matcher afterwards because the
+  // latter calls bool operator==(const Lhs& lhs, const Rhs& rhs) in the end
+  // which might be undefined even when Rhs is implicitly convertible to Lhs
+  // (e.g. std::pair<const int, int> vs. std::pair<int, int>).
+  //
+  // We don't define this method inline as we need the declaration of Eq().
+  static Matcher<T> CastImpl(const M& value,
+                             std::false_type /* convertible_to_matcher */,
+                             std::false_type /* convertible_to_T */);
+};
+
+// This more specialized version is used when MatcherCast()'s argument
+// is already a Matcher.  This only compiles when type T can be
+// statically converted to type U.
+template <typename T, typename U>
+class MatcherCastImpl<T, Matcher<U> > {
+ public:
+  static Matcher<T> Cast(const Matcher<U>& source_matcher) {
+    return Matcher<T>(new Impl(source_matcher));
+  }
+
+ private:
+  class Impl : public MatcherInterface<T> {
+   public:
+    explicit Impl(const Matcher<U>& source_matcher)
+        : source_matcher_(source_matcher) {}
+
+    // We delegate the matching logic to the source matcher.
+    bool MatchAndExplain(T x, MatchResultListener* listener) const override {
+      using FromType = typename std::remove_cv<typename std::remove_pointer<
+          typename std::remove_reference<T>::type>::type>::type;
+      using ToType = typename std::remove_cv<typename std::remove_pointer<
+          typename std::remove_reference<U>::type>::type>::type;
+      // Do not allow implicitly converting base*/& to derived*/&.
+      static_assert(
+          // Do not trigger if only one of them is a pointer. That implies a
+          // regular conversion and not a down_cast.
+          (std::is_pointer<typename std::remove_reference<T>::type>::value !=
+           std::is_pointer<typename std::remove_reference<U>::type>::value) ||
+              std::is_same<FromType, ToType>::value ||
+              !std::is_base_of<FromType, ToType>::value,
+          "Can't implicitly convert from <base> to <derived>");
+
+      // Do the cast to `U` explicitly if necessary.
+      // Otherwise, let implicit conversions do the trick.
+      using CastType =
+          typename std::conditional<std::is_convertible<T&, const U&>::value,
+                                    T&, U>::type;
+
+      return source_matcher_.MatchAndExplain(static_cast<CastType>(x),
+                                             listener);
+    }
+
+    void DescribeTo(::std::ostream* os) const override {
+      source_matcher_.DescribeTo(os);
+    }
+
+    void DescribeNegationTo(::std::ostream* os) const override {
+      source_matcher_.DescribeNegationTo(os);
+    }
+
+   private:
+    const Matcher<U> source_matcher_;
+  };
+};
+
+// This even more specialized version is used for efficiently casting
+// a matcher to its own type.
+template <typename T>
+class MatcherCastImpl<T, Matcher<T> > {
+ public:
+  static Matcher<T> Cast(const Matcher<T>& matcher) { return matcher; }
+};
+
+// Template specialization for parameterless Matcher.
+template <typename Derived>
+class MatcherBaseImpl {
+ public:
+  MatcherBaseImpl() = default;
+
+  template <typename T>
+  operator ::testing::Matcher<T>() const {  // NOLINT(runtime/explicit)
+    return ::testing::Matcher<T>(new
+                                 typename Derived::template gmock_Impl<T>());
+  }
+};
+
+// Template specialization for Matcher with parameters.
+template <template <typename...> class Derived, typename... Ts>
+class MatcherBaseImpl<Derived<Ts...>> {
+ public:
+  // Mark the constructor explicit for single argument T to avoid implicit
+  // conversions.
+  template <typename E = std::enable_if<sizeof...(Ts) == 1>,
+            typename E::type* = nullptr>
+  explicit MatcherBaseImpl(Ts... params)
+      : params_(std::forward<Ts>(params)...) {}
+  template <typename E = std::enable_if<sizeof...(Ts) != 1>,
+            typename = typename E::type>
+  MatcherBaseImpl(Ts... params)  // NOLINT
+      : params_(std::forward<Ts>(params)...) {}
+
+  template <typename F>
+  operator ::testing::Matcher<F>() const {  // NOLINT(runtime/explicit)
+    return Apply<F>(MakeIndexSequence<sizeof...(Ts)>{});
+  }
+
+ private:
+  template <typename F, std::size_t... tuple_ids>
+  ::testing::Matcher<F> Apply(IndexSequence<tuple_ids...>) const {
+    return ::testing::Matcher<F>(
+        new typename Derived<Ts...>::template gmock_Impl<F>(
+            std::get<tuple_ids>(params_)...));
+  }
+
+  const std::tuple<Ts...> params_;
+};
+
+}  // namespace internal
+
+// In order to be safe and clear, casting between different matcher
+// types is done explicitly via MatcherCast<T>(m), which takes a
+// matcher m and returns a Matcher<T>.  It compiles only when T can be
+// statically converted to the argument type of m.
+template <typename T, typename M>
+inline Matcher<T> MatcherCast(const M& matcher) {
+  return internal::MatcherCastImpl<T, M>::Cast(matcher);
+}
+
+// This overload handles polymorphic matchers and values only since
+// monomorphic matchers are handled by the next one.
+template <typename T, typename M>
+inline Matcher<T> SafeMatcherCast(const M& polymorphic_matcher_or_value) {
+  return MatcherCast<T>(polymorphic_matcher_or_value);
+}
+
+// This overload handles monomorphic matchers.
+//
+// In general, if type T can be implicitly converted to type U, we can
+// safely convert a Matcher<U> to a Matcher<T> (i.e. Matcher is
+// contravariant): just keep a copy of the original Matcher<U>, convert the
+// argument from type T to U, and then pass it to the underlying Matcher<U>.
+// The only exception is when U is a reference and T is not, as the
+// underlying Matcher<U> may be interested in the argument's address, which
+// is not preserved in the conversion from T to U.
+template <typename T, typename U>
+inline Matcher<T> SafeMatcherCast(const Matcher<U>& matcher) {
+  // Enforce that T can be implicitly converted to U.
+  static_assert(std::is_convertible<const T&, const U&>::value,
+                "T must be implicitly convertible to U");
+  // Enforce that we are not converting a non-reference type T to a reference
+  // type U.
+  GTEST_COMPILE_ASSERT_(
+      std::is_reference<T>::value || !std::is_reference<U>::value,
+      cannot_convert_non_reference_arg_to_reference);
+  // In case both T and U are arithmetic types, enforce that the
+  // conversion is not lossy.
+  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(T) RawT;
+  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(U) RawU;
+  constexpr bool kTIsOther = GMOCK_KIND_OF_(RawT) == internal::kOther;
+  constexpr bool kUIsOther = GMOCK_KIND_OF_(RawU) == internal::kOther;
+  GTEST_COMPILE_ASSERT_(
+      kTIsOther || kUIsOther ||
+      (internal::LosslessArithmeticConvertible<RawT, RawU>::value),
+      conversion_of_arithmetic_types_must_be_lossless);
+  return MatcherCast<T>(matcher);
+}
+
+// A<T>() returns a matcher that matches any value of type T.
+template <typename T>
+Matcher<T> A();
+
+// Anything inside the 'internal' namespace IS INTERNAL IMPLEMENTATION
+// and MUST NOT BE USED IN USER CODE!!!
+namespace internal {
+
+// If the explanation is not empty, prints it to the ostream.
+inline void PrintIfNotEmpty(const std::string& explanation,
+                            ::std::ostream* os) {
+  if (explanation != "" && os != nullptr) {
+    *os << ", " << explanation;
+  }
+}
+
+// Returns true if the given type name is easy to read by a human.
+// This is used to decide whether printing the type of a value might
+// be helpful.
+inline bool IsReadableTypeName(const std::string& type_name) {
+  // We consider a type name readable if it's short or doesn't contain
+  // a template or function type.
+  return (type_name.length() <= 20 ||
+          type_name.find_first_of("<(") == std::string::npos);
+}
+
+// Matches the value against the given matcher, prints the value and explains
+// the match result to the listener. Returns the match result.
+// 'listener' must not be NULL.
+// Value cannot be passed by const reference, because some matchers take a
+// non-const argument.
+template <typename Value, typename T>
+bool MatchPrintAndExplain(Value& value, const Matcher<T>& matcher,
+                          MatchResultListener* listener) {
+  if (!listener->IsInterested()) {
+    // If the listener is not interested, we do not need to construct the
+    // inner explanation.
+    return matcher.Matches(value);
+  }
+
+  StringMatchResultListener inner_listener;
+  const bool match = matcher.MatchAndExplain(value, &inner_listener);
+
+  UniversalPrint(value, listener->stream());
+#if GTEST_HAS_RTTI
+  const std::string& type_name = GetTypeName<Value>();
+  if (IsReadableTypeName(type_name))
+    *listener->stream() << " (of type " << type_name << ")";
+#endif
+  PrintIfNotEmpty(inner_listener.str(), listener->stream());
+
+  return match;
+}
+
+// An internal helper class for doing compile-time loop on a tuple's
+// fields.
+template <size_t N>
+class TuplePrefix {
+ public:
+  // TuplePrefix<N>::Matches(matcher_tuple, value_tuple) returns true
+  // if and only if the first N fields of matcher_tuple matches
+  // the first N fields of value_tuple, respectively.
+  template <typename MatcherTuple, typename ValueTuple>
+  static bool Matches(const MatcherTuple& matcher_tuple,
+                      const ValueTuple& value_tuple) {
+    return TuplePrefix<N - 1>::Matches(matcher_tuple, value_tuple) &&
+           std::get<N - 1>(matcher_tuple).Matches(std::get<N - 1>(value_tuple));
+  }
+
+  // TuplePrefix<N>::ExplainMatchFailuresTo(matchers, values, os)
+  // describes failures in matching the first N fields of matchers
+  // against the first N fields of values.  If there is no failure,
+  // nothing will be streamed to os.
+  template <typename MatcherTuple, typename ValueTuple>
+  static void ExplainMatchFailuresTo(const MatcherTuple& matchers,
+                                     const ValueTuple& values,
+                                     ::std::ostream* os) {
+    // First, describes failures in the first N - 1 fields.
+    TuplePrefix<N - 1>::ExplainMatchFailuresTo(matchers, values, os);
+
+    // Then describes the failure (if any) in the (N - 1)-th (0-based)
+    // field.
+    typename std::tuple_element<N - 1, MatcherTuple>::type matcher =
+        std::get<N - 1>(matchers);
+    typedef typename std::tuple_element<N - 1, ValueTuple>::type Value;
+    const Value& value = std::get<N - 1>(values);
+    StringMatchResultListener listener;
+    if (!matcher.MatchAndExplain(value, &listener)) {
+      *os << "  Expected arg #" << N - 1 << ": ";
+      std::get<N - 1>(matchers).DescribeTo(os);
+      *os << "\n           Actual: ";
+      // We remove the reference in type Value to prevent the
+      // universal printer from printing the address of value, which
+      // isn't interesting to the user most of the time.  The
+      // matcher's MatchAndExplain() method handles the case when
+      // the address is interesting.
+      internal::UniversalPrint(value, os);
+      PrintIfNotEmpty(listener.str(), os);
+      *os << "\n";
+    }
+  }
+};
+
+// The base case.
+template <>
+class TuplePrefix<0> {
+ public:
+  template <typename MatcherTuple, typename ValueTuple>
+  static bool Matches(const MatcherTuple& /* matcher_tuple */,
+                      const ValueTuple& /* value_tuple */) {
+    return true;
+  }
+
+  template <typename MatcherTuple, typename ValueTuple>
+  static void ExplainMatchFailuresTo(const MatcherTuple& /* matchers */,
+                                     const ValueTuple& /* values */,
+                                     ::std::ostream* /* os */) {}
+};
+
+// TupleMatches(matcher_tuple, value_tuple) returns true if and only if
+// all matchers in matcher_tuple match the corresponding fields in
+// value_tuple.  It is a compiler error if matcher_tuple and
+// value_tuple have different number of fields or incompatible field
+// types.
+template <typename MatcherTuple, typename ValueTuple>
+bool TupleMatches(const MatcherTuple& matcher_tuple,
+                  const ValueTuple& value_tuple) {
+  // Makes sure that matcher_tuple and value_tuple have the same
+  // number of fields.
+  GTEST_COMPILE_ASSERT_(std::tuple_size<MatcherTuple>::value ==
+                            std::tuple_size<ValueTuple>::value,
+                        matcher_and_value_have_different_numbers_of_fields);
+  return TuplePrefix<std::tuple_size<ValueTuple>::value>::Matches(matcher_tuple,
+                                                                  value_tuple);
+}
+
+// Describes failures in matching matchers against values.  If there
+// is no failure, nothing will be streamed to os.
+template <typename MatcherTuple, typename ValueTuple>
+void ExplainMatchFailureTupleTo(const MatcherTuple& matchers,
+                                const ValueTuple& values,
+                                ::std::ostream* os) {
+  TuplePrefix<std::tuple_size<MatcherTuple>::value>::ExplainMatchFailuresTo(
+      matchers, values, os);
+}
+
+// TransformTupleValues and its helper.
+//
+// TransformTupleValuesHelper hides the internal machinery that
+// TransformTupleValues uses to implement a tuple traversal.
+template <typename Tuple, typename Func, typename OutIter>
+class TransformTupleValuesHelper {
+ private:
+  typedef ::std::tuple_size<Tuple> TupleSize;
+
+ public:
+  // For each member of tuple 't', taken in order, evaluates '*out++ = f(t)'.
+  // Returns the final value of 'out' in case the caller needs it.
+  static OutIter Run(Func f, const Tuple& t, OutIter out) {
+    return IterateOverTuple<Tuple, TupleSize::value>()(f, t, out);
+  }
+
+ private:
+  template <typename Tup, size_t kRemainingSize>
+  struct IterateOverTuple {
+    OutIter operator() (Func f, const Tup& t, OutIter out) const {
+      *out++ = f(::std::get<TupleSize::value - kRemainingSize>(t));
+      return IterateOverTuple<Tup, kRemainingSize - 1>()(f, t, out);
+    }
+  };
+  template <typename Tup>
+  struct IterateOverTuple<Tup, 0> {
+    OutIter operator() (Func /* f */, const Tup& /* t */, OutIter out) const {
+      return out;
+    }
+  };
+};
+
+// Successively invokes 'f(element)' on each element of the tuple 't',
+// appending each result to the 'out' iterator. Returns the final value
+// of 'out'.
+template <typename Tuple, typename Func, typename OutIter>
+OutIter TransformTupleValues(Func f, const Tuple& t, OutIter out) {
+  return TransformTupleValuesHelper<Tuple, Func, OutIter>::Run(f, t, out);
+}
+
+// Implements _, a matcher that matches any value of any
+// type.  This is a polymorphic matcher, so we need a template type
+// conversion operator to make it appearing as a Matcher<T> for any
+// type T.
+class AnythingMatcher {
+ public:
+  using is_gtest_matcher = void;
+
+  template <typename T>
+  bool MatchAndExplain(const T& /* x */, std::ostream* /* listener */) const {
+    return true;
+  }
+  void DescribeTo(std::ostream* os) const { *os << "is anything"; }
+  void DescribeNegationTo(::std::ostream* os) const {
+    // This is mostly for completeness' sake, as it's not very useful
+    // to write Not(A<bool>()).  However we cannot completely rule out
+    // such a possibility, and it doesn't hurt to be prepared.
+    *os << "never matches";
+  }
+};
+
+// Implements the polymorphic IsNull() matcher, which matches any raw or smart
+// pointer that is NULL.
+class IsNullMatcher {
+ public:
+  template <typename Pointer>
+  bool MatchAndExplain(const Pointer& p,
+                       MatchResultListener* /* listener */) const {
+    return p == nullptr;
+  }
+
+  void DescribeTo(::std::ostream* os) const { *os << "is NULL"; }
+  void DescribeNegationTo(::std::ostream* os) const {
+    *os << "isn't NULL";
+  }
+};
+
+// Implements the polymorphic NotNull() matcher, which matches any raw or smart
+// pointer that is not NULL.
+class NotNullMatcher {
+ public:
+  template <typename Pointer>
+  bool MatchAndExplain(const Pointer& p,
+                       MatchResultListener* /* listener */) const {
+    return p != nullptr;
+  }
+
+  void DescribeTo(::std::ostream* os) const { *os << "isn't NULL"; }
+  void DescribeNegationTo(::std::ostream* os) const {
+    *os << "is NULL";
+  }
+};
+
+// Ref(variable) matches any argument that is a reference to
+// 'variable'.  This matcher is polymorphic as it can match any
+// super type of the type of 'variable'.
+//
+// The RefMatcher template class implements Ref(variable).  It can
+// only be instantiated with a reference type.  This prevents a user
+// from mistakenly using Ref(x) to match a non-reference function
+// argument.  For example, the following will righteously cause a
+// compiler error:
+//
+//   int n;
+//   Matcher<int> m1 = Ref(n);   // This won't compile.
+//   Matcher<int&> m2 = Ref(n);  // This will compile.
+template <typename T>
+class RefMatcher;
+
+template <typename T>
+class RefMatcher<T&> {
+  // Google Mock is a generic framework and thus needs to support
+  // mocking any function types, including those that take non-const
+  // reference arguments.  Therefore the template parameter T (and
+  // Super below) can be instantiated to either a const type or a
+  // non-const type.
+ public:
+  // RefMatcher() takes a T& instead of const T&, as we want the
+  // compiler to catch using Ref(const_value) as a matcher for a
+  // non-const reference.
+  explicit RefMatcher(T& x) : object_(x) {}  // NOLINT
+
+  template <typename Super>
+  operator Matcher<Super&>() const {
+    // By passing object_ (type T&) to Impl(), which expects a Super&,
+    // we make sure that Super is a super type of T.  In particular,
+    // this catches using Ref(const_value) as a matcher for a
+    // non-const reference, as you cannot implicitly convert a const
+    // reference to a non-const reference.
+    return MakeMatcher(new Impl<Super>(object_));
+  }
+
+ private:
+  template <typename Super>
+  class Impl : public MatcherInterface<Super&> {
+   public:
+    explicit Impl(Super& x) : object_(x) {}  // NOLINT
+
+    // MatchAndExplain() takes a Super& (as opposed to const Super&)
+    // in order to match the interface MatcherInterface<Super&>.
+    bool MatchAndExplain(Super& x,
+                         MatchResultListener* listener) const override {
+      *listener << "which is located @" << static_cast<const void*>(&x);
+      return &x == &object_;
+    }
+
+    void DescribeTo(::std::ostream* os) const override {
+      *os << "references the variable ";
+      UniversalPrinter<Super&>::Print(object_, os);
+    }
+
+    void DescribeNegationTo(::std::ostream* os) const override {
+      *os << "does not reference the variable ";
+      UniversalPrinter<Super&>::Print(object_, os);
+    }
+
+   private:
+    const Super& object_;
+  };
+
+  T& object_;
+};
+
+// Polymorphic helper functions for narrow and wide string matchers.
+inline bool CaseInsensitiveCStringEquals(const char* lhs, const char* rhs) {
+  return String::CaseInsensitiveCStringEquals(lhs, rhs);
+}
+
+inline bool CaseInsensitiveCStringEquals(const wchar_t* lhs,
+                                         const wchar_t* rhs) {
+  return String::CaseInsensitiveWideCStringEquals(lhs, rhs);
+}
+
+// String comparison for narrow or wide strings that can have embedded NUL
+// characters.
+template <typename StringType>
+bool CaseInsensitiveStringEquals(const StringType& s1,
+                                 const StringType& s2) {
+  // Are the heads equal?
+  if (!CaseInsensitiveCStringEquals(s1.c_str(), s2.c_str())) {
+    return false;
+  }
+
+  // Skip the equal heads.
+  const typename StringType::value_type nul = 0;
+  const size_t i1 = s1.find(nul), i2 = s2.find(nul);
+
+  // Are we at the end of either s1 or s2?
+  if (i1 == StringType::npos || i2 == StringType::npos) {
+    return i1 == i2;
+  }
+
+  // Are the tails equal?
+  return CaseInsensitiveStringEquals(s1.substr(i1 + 1), s2.substr(i2 + 1));
+}
+
+// String matchers.
+
+// Implements equality-based string matchers like StrEq, StrCaseNe, and etc.
+template <typename StringType>
+class StrEqualityMatcher {
+ public:
+  StrEqualityMatcher(StringType str, bool expect_eq, bool case_sensitive)
+      : string_(std::move(str)),
+        expect_eq_(expect_eq),
+        case_sensitive_(case_sensitive) {}
+
+#if GTEST_INTERNAL_HAS_STRING_VIEW
+  bool MatchAndExplain(const internal::StringView& s,
+                       MatchResultListener* listener) const {
+    // This should fail to compile if StringView is used with wide
+    // strings.
+    const StringType& str = std::string(s);
+    return MatchAndExplain(str, listener);
+  }
+#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
+
+  // Accepts pointer types, particularly:
+  //   const char*
+  //   char*
+  //   const wchar_t*
+  //   wchar_t*
+  template <typename CharType>
+  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
+    if (s == nullptr) {
+      return !expect_eq_;
+    }
+    return MatchAndExplain(StringType(s), listener);
+  }
+
+  // Matches anything that can convert to StringType.
+  //
+  // This is a template, not just a plain function with const StringType&,
+  // because StringView has some interfering non-explicit constructors.
+  template <typename MatcheeStringType>
+  bool MatchAndExplain(const MatcheeStringType& s,
+                       MatchResultListener* /* listener */) const {
+    const StringType s2(s);
+    const bool eq = case_sensitive_ ? s2 == string_ :
+        CaseInsensitiveStringEquals(s2, string_);
+    return expect_eq_ == eq;
+  }
+
+  void DescribeTo(::std::ostream* os) const {
+    DescribeToHelper(expect_eq_, os);
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const {
+    DescribeToHelper(!expect_eq_, os);
+  }
+
+ private:
+  void DescribeToHelper(bool expect_eq, ::std::ostream* os) const {
+    *os << (expect_eq ? "is " : "isn't ");
+    *os << "equal to ";
+    if (!case_sensitive_) {
+      *os << "(ignoring case) ";
+    }
+    UniversalPrint(string_, os);
+  }
+
+  const StringType string_;
+  const bool expect_eq_;
+  const bool case_sensitive_;
+};
+
+// Implements the polymorphic HasSubstr(substring) matcher, which
+// can be used as a Matcher<T> as long as T can be converted to a
+// string.
+template <typename StringType>
+class HasSubstrMatcher {
+ public:
+  explicit HasSubstrMatcher(const StringType& substring)
+      : substring_(substring) {}
+
+#if GTEST_INTERNAL_HAS_STRING_VIEW
+  bool MatchAndExplain(const internal::StringView& s,
+                       MatchResultListener* listener) const {
+    // This should fail to compile if StringView is used with wide
+    // strings.
+    const StringType& str = std::string(s);
+    return MatchAndExplain(str, listener);
+  }
+#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
+
+  // Accepts pointer types, particularly:
+  //   const char*
+  //   char*
+  //   const wchar_t*
+  //   wchar_t*
+  template <typename CharType>
+  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
+    return s != nullptr && MatchAndExplain(StringType(s), listener);
+  }
+
+  // Matches anything that can convert to StringType.
+  //
+  // This is a template, not just a plain function with const StringType&,
+  // because StringView has some interfering non-explicit constructors.
+  template <typename MatcheeStringType>
+  bool MatchAndExplain(const MatcheeStringType& s,
+                       MatchResultListener* /* listener */) const {
+    return StringType(s).find(substring_) != StringType::npos;
+  }
+
+  // Describes what this matcher matches.
+  void DescribeTo(::std::ostream* os) const {
+    *os << "has substring ";
+    UniversalPrint(substring_, os);
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const {
+    *os << "has no substring ";
+    UniversalPrint(substring_, os);
+  }
+
+ private:
+  const StringType substring_;
+};
+
+// Implements the polymorphic StartsWith(substring) matcher, which
+// can be used as a Matcher<T> as long as T can be converted to a
+// string.
+template <typename StringType>
+class StartsWithMatcher {
+ public:
+  explicit StartsWithMatcher(const StringType& prefix) : prefix_(prefix) {
+  }
+
+#if GTEST_INTERNAL_HAS_STRING_VIEW
+  bool MatchAndExplain(const internal::StringView& s,
+                       MatchResultListener* listener) const {
+    // This should fail to compile if StringView is used with wide
+    // strings.
+    const StringType& str = std::string(s);
+    return MatchAndExplain(str, listener);
+  }
+#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
+
+  // Accepts pointer types, particularly:
+  //   const char*
+  //   char*
+  //   const wchar_t*
+  //   wchar_t*
+  template <typename CharType>
+  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
+    return s != nullptr && MatchAndExplain(StringType(s), listener);
+  }
+
+  // Matches anything that can convert to StringType.
+  //
+  // This is a template, not just a plain function with const StringType&,
+  // because StringView has some interfering non-explicit constructors.
+  template <typename MatcheeStringType>
+  bool MatchAndExplain(const MatcheeStringType& s,
+                       MatchResultListener* /* listener */) const {
+    const StringType& s2(s);
+    return s2.length() >= prefix_.length() &&
+        s2.substr(0, prefix_.length()) == prefix_;
+  }
+
+  void DescribeTo(::std::ostream* os) const {
+    *os << "starts with ";
+    UniversalPrint(prefix_, os);
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const {
+    *os << "doesn't start with ";
+    UniversalPrint(prefix_, os);
+  }
+
+ private:
+  const StringType prefix_;
+};
+
+// Implements the polymorphic EndsWith(substring) matcher, which
+// can be used as a Matcher<T> as long as T can be converted to a
+// string.
+template <typename StringType>
+class EndsWithMatcher {
+ public:
+  explicit EndsWithMatcher(const StringType& suffix) : suffix_(suffix) {}
+
+#if GTEST_INTERNAL_HAS_STRING_VIEW
+  bool MatchAndExplain(const internal::StringView& s,
+                       MatchResultListener* listener) const {
+    // This should fail to compile if StringView is used with wide
+    // strings.
+    const StringType& str = std::string(s);
+    return MatchAndExplain(str, listener);
+  }
+#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
+
+  // Accepts pointer types, particularly:
+  //   const char*
+  //   char*
+  //   const wchar_t*
+  //   wchar_t*
+  template <typename CharType>
+  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
+    return s != nullptr && MatchAndExplain(StringType(s), listener);
+  }
+
+  // Matches anything that can convert to StringType.
+  //
+  // This is a template, not just a plain function with const StringType&,
+  // because StringView has some interfering non-explicit constructors.
+  template <typename MatcheeStringType>
+  bool MatchAndExplain(const MatcheeStringType& s,
+                       MatchResultListener* /* listener */) const {
+    const StringType& s2(s);
+    return s2.length() >= suffix_.length() &&
+        s2.substr(s2.length() - suffix_.length()) == suffix_;
+  }
+
+  void DescribeTo(::std::ostream* os) const {
+    *os << "ends with ";
+    UniversalPrint(suffix_, os);
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const {
+    *os << "doesn't end with ";
+    UniversalPrint(suffix_, os);
+  }
+
+ private:
+  const StringType suffix_;
+};
+
+// Implements a matcher that compares the two fields of a 2-tuple
+// using one of the ==, <=, <, etc, operators.  The two fields being
+// compared don't have to have the same type.
+//
+// The matcher defined here is polymorphic (for example, Eq() can be
+// used to match a std::tuple<int, short>, a std::tuple<const long&, double>,
+// etc).  Therefore we use a template type conversion operator in the
+// implementation.
+template <typename D, typename Op>
+class PairMatchBase {
+ public:
+  template <typename T1, typename T2>
+  operator Matcher<::std::tuple<T1, T2>>() const {
+    return Matcher<::std::tuple<T1, T2>>(new Impl<const ::std::tuple<T1, T2>&>);
+  }
+  template <typename T1, typename T2>
+  operator Matcher<const ::std::tuple<T1, T2>&>() const {
+    return MakeMatcher(new Impl<const ::std::tuple<T1, T2>&>);
+  }
+
+ private:
+  static ::std::ostream& GetDesc(::std::ostream& os) {  // NOLINT
+    return os << D::Desc();
+  }
+
+  template <typename Tuple>
+  class Impl : public MatcherInterface<Tuple> {
+   public:
+    bool MatchAndExplain(Tuple args,
+                         MatchResultListener* /* listener */) const override {
+      return Op()(::std::get<0>(args), ::std::get<1>(args));
+    }
+    void DescribeTo(::std::ostream* os) const override {
+      *os << "are " << GetDesc;
+    }
+    void DescribeNegationTo(::std::ostream* os) const override {
+      *os << "aren't " << GetDesc;
+    }
+  };
+};
+
+class Eq2Matcher : public PairMatchBase<Eq2Matcher, AnyEq> {
+ public:
+  static const char* Desc() { return "an equal pair"; }
+};
+class Ne2Matcher : public PairMatchBase<Ne2Matcher, AnyNe> {
+ public:
+  static const char* Desc() { return "an unequal pair"; }
+};
+class Lt2Matcher : public PairMatchBase<Lt2Matcher, AnyLt> {
+ public:
+  static const char* Desc() { return "a pair where the first < the second"; }
+};
+class Gt2Matcher : public PairMatchBase<Gt2Matcher, AnyGt> {
+ public:
+  static const char* Desc() { return "a pair where the first > the second"; }
+};
+class Le2Matcher : public PairMatchBase<Le2Matcher, AnyLe> {
+ public:
+  static const char* Desc() { return "a pair where the first <= the second"; }
+};
+class Ge2Matcher : public PairMatchBase<Ge2Matcher, AnyGe> {
+ public:
+  static const char* Desc() { return "a pair where the first >= the second"; }
+};
+
+// Implements the Not(...) matcher for a particular argument type T.
+// We do not nest it inside the NotMatcher class template, as that
+// will prevent different instantiations of NotMatcher from sharing
+// the same NotMatcherImpl<T> class.
+template <typename T>
+class NotMatcherImpl : public MatcherInterface<const T&> {
+ public:
+  explicit NotMatcherImpl(const Matcher<T>& matcher)
+      : matcher_(matcher) {}
+
+  bool MatchAndExplain(const T& x,
+                       MatchResultListener* listener) const override {
+    return !matcher_.MatchAndExplain(x, listener);
+  }
+
+  void DescribeTo(::std::ostream* os) const override {
+    matcher_.DescribeNegationTo(os);
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const override {
+    matcher_.DescribeTo(os);
+  }
+
+ private:
+  const Matcher<T> matcher_;
+};
+
+// Implements the Not(m) matcher, which matches a value that doesn't
+// match matcher m.
+template <typename InnerMatcher>
+class NotMatcher {
+ public:
+  explicit NotMatcher(InnerMatcher matcher) : matcher_(matcher) {}
+
+  // This template type conversion operator allows Not(m) to be used
+  // to match any type m can match.
+  template <typename T>
+  operator Matcher<T>() const {
+    return Matcher<T>(new NotMatcherImpl<T>(SafeMatcherCast<T>(matcher_)));
+  }
+
+ private:
+  InnerMatcher matcher_;
+};
+
+// Implements the AllOf(m1, m2) matcher for a particular argument type
+// T. We do not nest it inside the BothOfMatcher class template, as
+// that will prevent different instantiations of BothOfMatcher from
+// sharing the same BothOfMatcherImpl<T> class.
+template <typename T>
+class AllOfMatcherImpl : public MatcherInterface<const T&> {
+ public:
+  explicit AllOfMatcherImpl(std::vector<Matcher<T> > matchers)
+      : matchers_(std::move(matchers)) {}
+
+  void DescribeTo(::std::ostream* os) const override {
+    *os << "(";
+    for (size_t i = 0; i < matchers_.size(); ++i) {
+      if (i != 0) *os << ") and (";
+      matchers_[i].DescribeTo(os);
+    }
+    *os << ")";
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const override {
+    *os << "(";
+    for (size_t i = 0; i < matchers_.size(); ++i) {
+      if (i != 0) *os << ") or (";
+      matchers_[i].DescribeNegationTo(os);
+    }
+    *os << ")";
+  }
+
+  bool MatchAndExplain(const T& x,
+                       MatchResultListener* listener) const override {
+    // If either matcher1_ or matcher2_ doesn't match x, we only need
+    // to explain why one of them fails.
+    std::string all_match_result;
+
+    for (size_t i = 0; i < matchers_.size(); ++i) {
+      StringMatchResultListener slistener;
+      if (matchers_[i].MatchAndExplain(x, &slistener)) {
+        if (all_match_result.empty()) {
+          all_match_result = slistener.str();
+        } else {
+          std::string result = slistener.str();
+          if (!result.empty()) {
+            all_match_result += ", and ";
+            all_match_result += result;
+          }
+        }
+      } else {
+        *listener << slistener.str();
+        return false;
+      }
+    }
+
+    // Otherwise we need to explain why *both* of them match.
+    *listener << all_match_result;
+    return true;
+  }
+
+ private:
+  const std::vector<Matcher<T> > matchers_;
+};
+
+// VariadicMatcher is used for the variadic implementation of
+// AllOf(m_1, m_2, ...) and AnyOf(m_1, m_2, ...).
+// CombiningMatcher<T> is used to recursively combine the provided matchers
+// (of type Args...).
+template <template <typename T> class CombiningMatcher, typename... Args>
+class VariadicMatcher {
+ public:
+  VariadicMatcher(const Args&... matchers)  // NOLINT
+      : matchers_(matchers...) {
+    static_assert(sizeof...(Args) > 0, "Must have at least one matcher.");
+  }
+
+  VariadicMatcher(const VariadicMatcher&) = default;
+  VariadicMatcher& operator=(const VariadicMatcher&) = delete;
+
+  // This template type conversion operator allows an
+  // VariadicMatcher<Matcher1, Matcher2...> object to match any type that
+  // all of the provided matchers (Matcher1, Matcher2, ...) can match.
+  template <typename T>
+  operator Matcher<T>() const {
+    std::vector<Matcher<T> > values;
+    CreateVariadicMatcher<T>(&values, std::integral_constant<size_t, 0>());
+    return Matcher<T>(new CombiningMatcher<T>(std::move(values)));
+  }
+
+ private:
+  template <typename T, size_t I>
+  void CreateVariadicMatcher(std::vector<Matcher<T> >* values,
+                             std::integral_constant<size_t, I>) const {
+    values->push_back(SafeMatcherCast<T>(std::get<I>(matchers_)));
+    CreateVariadicMatcher<T>(values, std::integral_constant<size_t, I + 1>());
+  }
+
+  template <typename T>
+  void CreateVariadicMatcher(
+      std::vector<Matcher<T> >*,
+      std::integral_constant<size_t, sizeof...(Args)>) const {}
+
+  std::tuple<Args...> matchers_;
+};
+
+template <typename... Args>
+using AllOfMatcher = VariadicMatcher<AllOfMatcherImpl, Args...>;
+
+// Implements the AnyOf(m1, m2) matcher for a particular argument type
+// T.  We do not nest it inside the AnyOfMatcher class template, as
+// that will prevent different instantiations of AnyOfMatcher from
+// sharing the same EitherOfMatcherImpl<T> class.
+template <typename T>
+class AnyOfMatcherImpl : public MatcherInterface<const T&> {
+ public:
+  explicit AnyOfMatcherImpl(std::vector<Matcher<T> > matchers)
+      : matchers_(std::move(matchers)) {}
+
+  void DescribeTo(::std::ostream* os) const override {
+    *os << "(";
+    for (size_t i = 0; i < matchers_.size(); ++i) {
+      if (i != 0) *os << ") or (";
+      matchers_[i].DescribeTo(os);
+    }
+    *os << ")";
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const override {
+    *os << "(";
+    for (size_t i = 0; i < matchers_.size(); ++i) {
+      if (i != 0) *os << ") and (";
+      matchers_[i].DescribeNegationTo(os);
+    }
+    *os << ")";
+  }
+
+  bool MatchAndExplain(const T& x,
+                       MatchResultListener* listener) const override {
+    std::string no_match_result;
+
+    // If either matcher1_ or matcher2_ matches x, we just need to
+    // explain why *one* of them matches.
+    for (size_t i = 0; i < matchers_.size(); ++i) {
+      StringMatchResultListener slistener;
+      if (matchers_[i].MatchAndExplain(x, &slistener)) {
+        *listener << slistener.str();
+        return true;
+      } else {
+        if (no_match_result.empty()) {
+          no_match_result = slistener.str();
+        } else {
+          std::string result = slistener.str();
+          if (!result.empty()) {
+            no_match_result += ", and ";
+            no_match_result += result;
+          }
+        }
+      }
+    }
+
+    // Otherwise we need to explain why *both* of them fail.
+    *listener << no_match_result;
+    return false;
+  }
+
+ private:
+  const std::vector<Matcher<T> > matchers_;
+};
+
+// AnyOfMatcher is used for the variadic implementation of AnyOf(m_1, m_2, ...).
+template <typename... Args>
+using AnyOfMatcher = VariadicMatcher<AnyOfMatcherImpl, Args...>;
+
+// Wrapper for implementation of Any/AllOfArray().
+template <template <class> class MatcherImpl, typename T>
+class SomeOfArrayMatcher {
+ public:
+  // Constructs the matcher from a sequence of element values or
+  // element matchers.
+  template <typename Iter>
+  SomeOfArrayMatcher(Iter first, Iter last) : matchers_(first, last) {}
+
+  template <typename U>
+  operator Matcher<U>() const {  // NOLINT
+    using RawU = typename std::decay<U>::type;
+    std::vector<Matcher<RawU>> matchers;
+    for (const auto& matcher : matchers_) {
+      matchers.push_back(MatcherCast<RawU>(matcher));
+    }
+    return Matcher<U>(new MatcherImpl<RawU>(std::move(matchers)));
+  }
+
+ private:
+  const ::std::vector<T> matchers_;
+};
+
+template <typename T>
+using AllOfArrayMatcher = SomeOfArrayMatcher<AllOfMatcherImpl, T>;
+
+template <typename T>
+using AnyOfArrayMatcher = SomeOfArrayMatcher<AnyOfMatcherImpl, T>;
+
+// Used for implementing Truly(pred), which turns a predicate into a
+// matcher.
+template <typename Predicate>
+class TrulyMatcher {
+ public:
+  explicit TrulyMatcher(Predicate pred) : predicate_(pred) {}
+
+  // This method template allows Truly(pred) to be used as a matcher
+  // for type T where T is the argument type of predicate 'pred'.  The
+  // argument is passed by reference as the predicate may be
+  // interested in the address of the argument.
+  template <typename T>
+  bool MatchAndExplain(T& x,  // NOLINT
+                       MatchResultListener* listener) const {
+    // Without the if-statement, MSVC sometimes warns about converting
+    // a value to bool (warning 4800).
+    //
+    // We cannot write 'return !!predicate_(x);' as that doesn't work
+    // when predicate_(x) returns a class convertible to bool but
+    // having no operator!().
+    if (predicate_(x))
+      return true;
+    *listener << "didn't satisfy the given predicate";
+    return false;
+  }
+
+  void DescribeTo(::std::ostream* os) const {
+    *os << "satisfies the given predicate";
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const {
+    *os << "doesn't satisfy the given predicate";
+  }
+
+ private:
+  Predicate predicate_;
+};
+
+// Used for implementing Matches(matcher), which turns a matcher into
+// a predicate.
+template <typename M>
+class MatcherAsPredicate {
+ public:
+  explicit MatcherAsPredicate(M matcher) : matcher_(matcher) {}
+
+  // This template operator() allows Matches(m) to be used as a
+  // predicate on type T where m is a matcher on type T.
+  //
+  // The argument x is passed by reference instead of by value, as
+  // some matcher may be interested in its address (e.g. as in
+  // Matches(Ref(n))(x)).
+  template <typename T>
+  bool operator()(const T& x) const {
+    // We let matcher_ commit to a particular type here instead of
+    // when the MatcherAsPredicate object was constructed.  This
+    // allows us to write Matches(m) where m is a polymorphic matcher
+    // (e.g. Eq(5)).
+    //
+    // If we write Matcher<T>(matcher_).Matches(x) here, it won't
+    // compile when matcher_ has type Matcher<const T&>; if we write
+    // Matcher<const T&>(matcher_).Matches(x) here, it won't compile
+    // when matcher_ has type Matcher<T>; if we just write
+    // matcher_.Matches(x), it won't compile when matcher_ is
+    // polymorphic, e.g. Eq(5).
+    //
+    // MatcherCast<const T&>() is necessary for making the code work
+    // in all of the above situations.
+    return MatcherCast<const T&>(matcher_).Matches(x);
+  }
+
+ private:
+  M matcher_;
+};
+
+// For implementing ASSERT_THAT() and EXPECT_THAT().  The template
+// argument M must be a type that can be converted to a matcher.
+template <typename M>
+class PredicateFormatterFromMatcher {
+ public:
+  explicit PredicateFormatterFromMatcher(M m) : matcher_(std::move(m)) {}
+
+  // This template () operator allows a PredicateFormatterFromMatcher
+  // object to act as a predicate-formatter suitable for using with
+  // Google Test's EXPECT_PRED_FORMAT1() macro.
+  template <typename T>
+  AssertionResult operator()(const char* value_text, const T& x) const {
+    // We convert matcher_ to a Matcher<const T&> *now* instead of
+    // when the PredicateFormatterFromMatcher object was constructed,
+    // as matcher_ may be polymorphic (e.g. NotNull()) and we won't
+    // know which type to instantiate it to until we actually see the
+    // type of x here.
+    //
+    // We write SafeMatcherCast<const T&>(matcher_) instead of
+    // Matcher<const T&>(matcher_), as the latter won't compile when
+    // matcher_ has type Matcher<T> (e.g. An<int>()).
+    // We don't write MatcherCast<const T&> either, as that allows
+    // potentially unsafe downcasting of the matcher argument.
+    const Matcher<const T&> matcher = SafeMatcherCast<const T&>(matcher_);
+
+    // The expected path here is that the matcher should match (i.e. that most
+    // tests pass) so optimize for this case.
+    if (matcher.Matches(x)) {
+      return AssertionSuccess();
+    }
+
+    ::std::stringstream ss;
+    ss << "Value of: " << value_text << "\n"
+       << "Expected: ";
+    matcher.DescribeTo(&ss);
+
+    // Rerun the matcher to "PrintAndExplain" the failure.
+    StringMatchResultListener listener;
+    if (MatchPrintAndExplain(x, matcher, &listener)) {
+      ss << "\n  The matcher failed on the initial attempt; but passed when "
+            "rerun to generate the explanation.";
+    }
+    ss << "\n  Actual: " << listener.str();
+    return AssertionFailure() << ss.str();
+  }
+
+ private:
+  const M matcher_;
+};
+
+// A helper function for converting a matcher to a predicate-formatter
+// without the user needing to explicitly write the type.  This is
+// used for implementing ASSERT_THAT() and EXPECT_THAT().
+// Implementation detail: 'matcher' is received by-value to force decaying.
+template <typename M>
+inline PredicateFormatterFromMatcher<M>
+MakePredicateFormatterFromMatcher(M matcher) {
+  return PredicateFormatterFromMatcher<M>(std::move(matcher));
+}
+
+// Implements the polymorphic IsNan() matcher, which matches any floating type
+// value that is Nan.
+class IsNanMatcher {
+ public:
+  template <typename FloatType>
+  bool MatchAndExplain(const FloatType& f,
+                       MatchResultListener* /* listener */) const {
+    return (::std::isnan)(f);
+  }
+
+  void DescribeTo(::std::ostream* os) const { *os << "is NaN"; }
+  void DescribeNegationTo(::std::ostream* os) const {
+    *os << "isn't NaN";
+  }
+};
+
+// Implements the polymorphic floating point equality matcher, which matches
+// two float values using ULP-based approximation or, optionally, a
+// user-specified epsilon.  The template is meant to be instantiated with
+// FloatType being either float or double.
+template <typename FloatType>
+class FloatingEqMatcher {
+ public:
+  // Constructor for FloatingEqMatcher.
+  // The matcher's input will be compared with expected.  The matcher treats two
+  // NANs as equal if nan_eq_nan is true.  Otherwise, under IEEE standards,
+  // equality comparisons between NANs will always return false.  We specify a
+  // negative max_abs_error_ term to indicate that ULP-based approximation will
+  // be used for comparison.
+  FloatingEqMatcher(FloatType expected, bool nan_eq_nan) :
+    expected_(expected), nan_eq_nan_(nan_eq_nan), max_abs_error_(-1) {
+  }
+
+  // Constructor that supports a user-specified max_abs_error that will be used
+  // for comparison instead of ULP-based approximation.  The max absolute
+  // should be non-negative.
+  FloatingEqMatcher(FloatType expected, bool nan_eq_nan,
+                    FloatType max_abs_error)
+      : expected_(expected),
+        nan_eq_nan_(nan_eq_nan),
+        max_abs_error_(max_abs_error) {
+    GTEST_CHECK_(max_abs_error >= 0)
+        << ", where max_abs_error is" << max_abs_error;
+  }
+
+  // Implements floating point equality matcher as a Matcher<T>.
+  template <typename T>
+  class Impl : public MatcherInterface<T> {
+   public:
+    Impl(FloatType expected, bool nan_eq_nan, FloatType max_abs_error)
+        : expected_(expected),
+          nan_eq_nan_(nan_eq_nan),
+          max_abs_error_(max_abs_error) {}
+
+    bool MatchAndExplain(T value,
+                         MatchResultListener* listener) const override {
+      const FloatingPoint<FloatType> actual(value), expected(expected_);
+
+      // Compares NaNs first, if nan_eq_nan_ is true.
+      if (actual.is_nan() || expected.is_nan()) {
+        if (actual.is_nan() && expected.is_nan()) {
+          return nan_eq_nan_;
+        }
+        // One is nan; the other is not nan.
+        return false;
+      }
+      if (HasMaxAbsError()) {
+        // We perform an equality check so that inf will match inf, regardless
+        // of error bounds.  If the result of value - expected_ would result in
+        // overflow or if either value is inf, the default result is infinity,
+        // which should only match if max_abs_error_ is also infinity.
+        if (value == expected_) {
+          return true;
+        }
+
+        const FloatType diff = value - expected_;
+        if (::std::fabs(diff) <= max_abs_error_) {
+          return true;
+        }
+
+        if (listener->IsInterested()) {
+          *listener << "which is " << diff << " from " << expected_;
+        }
+        return false;
+      } else {
+        return actual.AlmostEquals(expected);
+      }
+    }
+
+    void DescribeTo(::std::ostream* os) const override {
+      // os->precision() returns the previously set precision, which we
+      // store to restore the ostream to its original configuration
+      // after outputting.
+      const ::std::streamsize old_precision = os->precision(
+          ::std::numeric_limits<FloatType>::digits10 + 2);
+      if (FloatingPoint<FloatType>(expected_).is_nan()) {
+        if (nan_eq_nan_) {
+          *os << "is NaN";
+        } else {
+          *os << "never matches";
+        }
+      } else {
+        *os << "is approximately " << expected_;
+        if (HasMaxAbsError()) {
+          *os << " (absolute error <= " << max_abs_error_ << ")";
+        }
+      }
+      os->precision(old_precision);
+    }
+
+    void DescribeNegationTo(::std::ostream* os) const override {
+      // As before, get original precision.
+      const ::std::streamsize old_precision = os->precision(
+          ::std::numeric_limits<FloatType>::digits10 + 2);
+      if (FloatingPoint<FloatType>(expected_).is_nan()) {
+        if (nan_eq_nan_) {
+          *os << "isn't NaN";
+        } else {
+          *os << "is anything";
+        }
+      } else {
+        *os << "isn't approximately " << expected_;
+        if (HasMaxAbsError()) {
+          *os << " (absolute error > " << max_abs_error_ << ")";
+        }
+      }
+      // Restore original precision.
+      os->precision(old_precision);
+    }
+
+   private:
+    bool HasMaxAbsError() const {
+      return max_abs_error_ >= 0;
+    }
+
+    const FloatType expected_;
+    const bool nan_eq_nan_;
+    // max_abs_error will be used for value comparison when >= 0.
+    const FloatType max_abs_error_;
+  };
+
+  // The following 3 type conversion operators allow FloatEq(expected) and
+  // NanSensitiveFloatEq(expected) to be used as a Matcher<float>, a
+  // Matcher<const float&>, or a Matcher<float&>, but nothing else.
+  operator Matcher<FloatType>() const {
+    return MakeMatcher(
+        new Impl<FloatType>(expected_, nan_eq_nan_, max_abs_error_));
+  }
+
+  operator Matcher<const FloatType&>() const {
+    return MakeMatcher(
+        new Impl<const FloatType&>(expected_, nan_eq_nan_, max_abs_error_));
+  }
+
+  operator Matcher<FloatType&>() const {
+    return MakeMatcher(
+        new Impl<FloatType&>(expected_, nan_eq_nan_, max_abs_error_));
+  }
+
+ private:
+  const FloatType expected_;
+  const bool nan_eq_nan_;
+  // max_abs_error will be used for value comparison when >= 0.
+  const FloatType max_abs_error_;
+};
+
+// A 2-tuple ("binary") wrapper around FloatingEqMatcher:
+// FloatingEq2Matcher() matches (x, y) by matching FloatingEqMatcher(x, false)
+// against y, and FloatingEq2Matcher(e) matches FloatingEqMatcher(x, false, e)
+// against y. The former implements "Eq", the latter "Near". At present, there
+// is no version that compares NaNs as equal.
+template <typename FloatType>
+class FloatingEq2Matcher {
+ public:
+  FloatingEq2Matcher() { Init(-1, false); }
+
+  explicit FloatingEq2Matcher(bool nan_eq_nan) { Init(-1, nan_eq_nan); }
+
+  explicit FloatingEq2Matcher(FloatType max_abs_error) {
+    Init(max_abs_error, false);
+  }
+
+  FloatingEq2Matcher(FloatType max_abs_error, bool nan_eq_nan) {
+    Init(max_abs_error, nan_eq_nan);
+  }
+
+  template <typename T1, typename T2>
+  operator Matcher<::std::tuple<T1, T2>>() const {
+    return MakeMatcher(
+        new Impl<::std::tuple<T1, T2>>(max_abs_error_, nan_eq_nan_));
+  }
+  template <typename T1, typename T2>
+  operator Matcher<const ::std::tuple<T1, T2>&>() const {
+    return MakeMatcher(
+        new Impl<const ::std::tuple<T1, T2>&>(max_abs_error_, nan_eq_nan_));
+  }
+
+ private:
+  static ::std::ostream& GetDesc(::std::ostream& os) {  // NOLINT
+    return os << "an almost-equal pair";
+  }
+
+  template <typename Tuple>
+  class Impl : public MatcherInterface<Tuple> {
+   public:
+    Impl(FloatType max_abs_error, bool nan_eq_nan) :
+        max_abs_error_(max_abs_error),
+        nan_eq_nan_(nan_eq_nan) {}
+
+    bool MatchAndExplain(Tuple args,
+                         MatchResultListener* listener) const override {
+      if (max_abs_error_ == -1) {
+        FloatingEqMatcher<FloatType> fm(::std::get<0>(args), nan_eq_nan_);
+        return static_cast<Matcher<FloatType>>(fm).MatchAndExplain(
+            ::std::get<1>(args), listener);
+      } else {
+        FloatingEqMatcher<FloatType> fm(::std::get<0>(args), nan_eq_nan_,
+                                        max_abs_error_);
+        return static_cast<Matcher<FloatType>>(fm).MatchAndExplain(
+            ::std::get<1>(args), listener);
+      }
+    }
+    void DescribeTo(::std::ostream* os) const override {
+      *os << "are " << GetDesc;
+    }
+    void DescribeNegationTo(::std::ostream* os) const override {
+      *os << "aren't " << GetDesc;
+    }
+
+   private:
+    FloatType max_abs_error_;
+    const bool nan_eq_nan_;
+  };
+
+  void Init(FloatType max_abs_error_val, bool nan_eq_nan_val) {
+    max_abs_error_ = max_abs_error_val;
+    nan_eq_nan_ = nan_eq_nan_val;
+  }
+  FloatType max_abs_error_;
+  bool nan_eq_nan_;
+};
+
+// Implements the Pointee(m) matcher for matching a pointer whose
+// pointee matches matcher m.  The pointer can be either raw or smart.
+template <typename InnerMatcher>
+class PointeeMatcher {
+ public:
+  explicit PointeeMatcher(const InnerMatcher& matcher) : matcher_(matcher) {}
+
+  // This type conversion operator template allows Pointee(m) to be
+  // used as a matcher for any pointer type whose pointee type is
+  // compatible with the inner matcher, where type Pointer can be
+  // either a raw pointer or a smart pointer.
+  //
+  // The reason we do this instead of relying on
+  // MakePolymorphicMatcher() is that the latter is not flexible
+  // enough for implementing the DescribeTo() method of Pointee().
+  template <typename Pointer>
+  operator Matcher<Pointer>() const {
+    return Matcher<Pointer>(new Impl<const Pointer&>(matcher_));
+  }
+
+ private:
+  // The monomorphic implementation that works for a particular pointer type.
+  template <typename Pointer>
+  class Impl : public MatcherInterface<Pointer> {
+   public:
+    using Pointee =
+        typename std::pointer_traits<GTEST_REMOVE_REFERENCE_AND_CONST_(
+            Pointer)>::element_type;
+
+    explicit Impl(const InnerMatcher& matcher)
+        : matcher_(MatcherCast<const Pointee&>(matcher)) {}
+
+    void DescribeTo(::std::ostream* os) const override {
+      *os << "points to a value that ";
+      matcher_.DescribeTo(os);
+    }
+
+    void DescribeNegationTo(::std::ostream* os) const override {
+      *os << "does not point to a value that ";
+      matcher_.DescribeTo(os);
+    }
+
+    bool MatchAndExplain(Pointer pointer,
+                         MatchResultListener* listener) const override {
+      if (GetRawPointer(pointer) == nullptr) return false;
+
+      *listener << "which points to ";
+      return MatchPrintAndExplain(*pointer, matcher_, listener);
+    }
+
+   private:
+    const Matcher<const Pointee&> matcher_;
+  };
+
+  const InnerMatcher matcher_;
+};
+
+// Implements the Pointer(m) matcher
+// Implements the Pointer(m) matcher for matching a pointer that matches matcher
+// m.  The pointer can be either raw or smart, and will match `m` against the
+// raw pointer.
+template <typename InnerMatcher>
+class PointerMatcher {
+ public:
+  explicit PointerMatcher(const InnerMatcher& matcher) : matcher_(matcher) {}
+
+  // This type conversion operator template allows Pointer(m) to be
+  // used as a matcher for any pointer type whose pointer type is
+  // compatible with the inner matcher, where type PointerType can be
+  // either a raw pointer or a smart pointer.
+  //
+  // The reason we do this instead of relying on
+  // MakePolymorphicMatcher() is that the latter is not flexible
+  // enough for implementing the DescribeTo() method of Pointer().
+  template <typename PointerType>
+  operator Matcher<PointerType>() const {  // NOLINT
+    return Matcher<PointerType>(new Impl<const PointerType&>(matcher_));
+  }
+
+ private:
+  // The monomorphic implementation that works for a particular pointer type.
+  template <typename PointerType>
+  class Impl : public MatcherInterface<PointerType> {
+   public:
+    using Pointer =
+        const typename std::pointer_traits<GTEST_REMOVE_REFERENCE_AND_CONST_(
+            PointerType)>::element_type*;
+
+    explicit Impl(const InnerMatcher& matcher)
+        : matcher_(MatcherCast<Pointer>(matcher)) {}
+
+    void DescribeTo(::std::ostream* os) const override {
+      *os << "is a pointer that ";
+      matcher_.DescribeTo(os);
+    }
+
+    void DescribeNegationTo(::std::ostream* os) const override {
+      *os << "is not a pointer that ";
+      matcher_.DescribeTo(os);
+    }
+
+    bool MatchAndExplain(PointerType pointer,
+                         MatchResultListener* listener) const override {
+      *listener << "which is a pointer that ";
+      Pointer p = GetRawPointer(pointer);
+      return MatchPrintAndExplain(p, matcher_, listener);
+    }
+
+   private:
+    Matcher<Pointer> matcher_;
+  };
+
+  const InnerMatcher matcher_;
+};
+
+#if GTEST_HAS_RTTI
+// Implements the WhenDynamicCastTo<T>(m) matcher that matches a pointer or
+// reference that matches inner_matcher when dynamic_cast<T> is applied.
+// The result of dynamic_cast<To> is forwarded to the inner matcher.
+// If To is a pointer and the cast fails, the inner matcher will receive NULL.
+// If To is a reference and the cast fails, this matcher returns false
+// immediately.
+template <typename To>
+class WhenDynamicCastToMatcherBase {
+ public:
+  explicit WhenDynamicCastToMatcherBase(const Matcher<To>& matcher)
+      : matcher_(matcher) {}
+
+  void DescribeTo(::std::ostream* os) const {
+    GetCastTypeDescription(os);
+    matcher_.DescribeTo(os);
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const {
+    GetCastTypeDescription(os);
+    matcher_.DescribeNegationTo(os);
+  }
+
+ protected:
+  const Matcher<To> matcher_;
+
+  static std::string GetToName() {
+    return GetTypeName<To>();
+  }
+
+ private:
+  static void GetCastTypeDescription(::std::ostream* os) {
+    *os << "when dynamic_cast to " << GetToName() << ", ";
+  }
+};
+
+// Primary template.
+// To is a pointer. Cast and forward the result.
+template <typename To>
+class WhenDynamicCastToMatcher : public WhenDynamicCastToMatcherBase<To> {
+ public:
+  explicit WhenDynamicCastToMatcher(const Matcher<To>& matcher)
+      : WhenDynamicCastToMatcherBase<To>(matcher) {}
+
+  template <typename From>
+  bool MatchAndExplain(From from, MatchResultListener* listener) const {
+    To to = dynamic_cast<To>(from);
+    return MatchPrintAndExplain(to, this->matcher_, listener);
+  }
+};
+
+// Specialize for references.
+// In this case we return false if the dynamic_cast fails.
+template <typename To>
+class WhenDynamicCastToMatcher<To&> : public WhenDynamicCastToMatcherBase<To&> {
+ public:
+  explicit WhenDynamicCastToMatcher(const Matcher<To&>& matcher)
+      : WhenDynamicCastToMatcherBase<To&>(matcher) {}
+
+  template <typename From>
+  bool MatchAndExplain(From& from, MatchResultListener* listener) const {
+    // We don't want an std::bad_cast here, so do the cast with pointers.
+    To* to = dynamic_cast<To*>(&from);
+    if (to == nullptr) {
+      *listener << "which cannot be dynamic_cast to " << this->GetToName();
+      return false;
+    }
+    return MatchPrintAndExplain(*to, this->matcher_, listener);
+  }
+};
+#endif  // GTEST_HAS_RTTI
+
+// Implements the Field() matcher for matching a field (i.e. member
+// variable) of an object.
+template <typename Class, typename FieldType>
+class FieldMatcher {
+ public:
+  FieldMatcher(FieldType Class::*field,
+               const Matcher<const FieldType&>& matcher)
+      : field_(field), matcher_(matcher), whose_field_("whose given field ") {}
+
+  FieldMatcher(const std::string& field_name, FieldType Class::*field,
+               const Matcher<const FieldType&>& matcher)
+      : field_(field),
+        matcher_(matcher),
+        whose_field_("whose field `" + field_name + "` ") {}
+
+  void DescribeTo(::std::ostream* os) const {
+    *os << "is an object " << whose_field_;
+    matcher_.DescribeTo(os);
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const {
+    *os << "is an object " << whose_field_;
+    matcher_.DescribeNegationTo(os);
+  }
+
+  template <typename T>
+  bool MatchAndExplain(const T& value, MatchResultListener* listener) const {
+    // FIXME: The dispatch on std::is_pointer was introduced as a workaround for
+    // a compiler bug, and can now be removed.
+    return MatchAndExplainImpl(
+        typename std::is_pointer<typename std::remove_const<T>::type>::type(),
+        value, listener);
+  }
+
+ private:
+  bool MatchAndExplainImpl(std::false_type /* is_not_pointer */,
+                           const Class& obj,
+                           MatchResultListener* listener) const {
+    *listener << whose_field_ << "is ";
+    return MatchPrintAndExplain(obj.*field_, matcher_, listener);
+  }
+
+  bool MatchAndExplainImpl(std::true_type /* is_pointer */, const Class* p,
+                           MatchResultListener* listener) const {
+    if (p == nullptr) return false;
+
+    *listener << "which points to an object ";
+    // Since *p has a field, it must be a class/struct/union type and
+    // thus cannot be a pointer.  Therefore we pass false_type() as
+    // the first argument.
+    return MatchAndExplainImpl(std::false_type(), *p, listener);
+  }
+
+  const FieldType Class::*field_;
+  const Matcher<const FieldType&> matcher_;
+
+  // Contains either "whose given field " if the name of the field is unknown
+  // or "whose field `name_of_field` " if the name is known.
+  const std::string whose_field_;
+};
+
+// Implements the Property() matcher for matching a property
+// (i.e. return value of a getter method) of an object.
+//
+// Property is a const-qualified member function of Class returning
+// PropertyType.
+template <typename Class, typename PropertyType, typename Property>
+class PropertyMatcher {
+ public:
+  typedef const PropertyType& RefToConstProperty;
+
+  PropertyMatcher(Property property, const Matcher<RefToConstProperty>& matcher)
+      : property_(property),
+        matcher_(matcher),
+        whose_property_("whose given property ") {}
+
+  PropertyMatcher(const std::string& property_name, Property property,
+                  const Matcher<RefToConstProperty>& matcher)
+      : property_(property),
+        matcher_(matcher),
+        whose_property_("whose property `" + property_name + "` ") {}
+
+  void DescribeTo(::std::ostream* os) const {
+    *os << "is an object " << whose_property_;
+    matcher_.DescribeTo(os);
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const {
+    *os << "is an object " << whose_property_;
+    matcher_.DescribeNegationTo(os);
+  }
+
+  template <typename T>
+  bool MatchAndExplain(const T&value, MatchResultListener* listener) const {
+    return MatchAndExplainImpl(
+        typename std::is_pointer<typename std::remove_const<T>::type>::type(),
+        value, listener);
+  }
+
+ private:
+  bool MatchAndExplainImpl(std::false_type /* is_not_pointer */,
+                           const Class& obj,
+                           MatchResultListener* listener) const {
+    *listener << whose_property_ << "is ";
+    // Cannot pass the return value (for example, int) to MatchPrintAndExplain,
+    // which takes a non-const reference as argument.
+    RefToConstProperty result = (obj.*property_)();
+    return MatchPrintAndExplain(result, matcher_, listener);
+  }
+
+  bool MatchAndExplainImpl(std::true_type /* is_pointer */, const Class* p,
+                           MatchResultListener* listener) const {
+    if (p == nullptr) return false;
+
+    *listener << "which points to an object ";
+    // Since *p has a property method, it must be a class/struct/union
+    // type and thus cannot be a pointer.  Therefore we pass
+    // false_type() as the first argument.
+    return MatchAndExplainImpl(std::false_type(), *p, listener);
+  }
+
+  Property property_;
+  const Matcher<RefToConstProperty> matcher_;
+
+  // Contains either "whose given property " if the name of the property is
+  // unknown or "whose property `name_of_property` " if the name is known.
+  const std::string whose_property_;
+};
+
+// Type traits specifying various features of different functors for ResultOf.
+// The default template specifies features for functor objects.
+template <typename Functor>
+struct CallableTraits {
+  typedef Functor StorageType;
+
+  static void CheckIsValid(Functor /* functor */) {}
+
+  template <typename T>
+  static auto Invoke(Functor f, const T& arg) -> decltype(f(arg)) {
+    return f(arg);
+  }
+};
+
+// Specialization for function pointers.
+template <typename ArgType, typename ResType>
+struct CallableTraits<ResType(*)(ArgType)> {
+  typedef ResType ResultType;
+  typedef ResType(*StorageType)(ArgType);
+
+  static void CheckIsValid(ResType(*f)(ArgType)) {
+    GTEST_CHECK_(f != nullptr)
+        << "NULL function pointer is passed into ResultOf().";
+  }
+  template <typename T>
+  static ResType Invoke(ResType(*f)(ArgType), T arg) {
+    return (*f)(arg);
+  }
+};
+
+// Implements the ResultOf() matcher for matching a return value of a
+// unary function of an object.
+template <typename Callable, typename InnerMatcher>
+class ResultOfMatcher {
+ public:
+  ResultOfMatcher(Callable callable, InnerMatcher matcher)
+      : callable_(std::move(callable)), matcher_(std::move(matcher)) {
+    CallableTraits<Callable>::CheckIsValid(callable_);
+  }
+
+  template <typename T>
+  operator Matcher<T>() const {
+    return Matcher<T>(new Impl<const T&>(callable_, matcher_));
+  }
+
+ private:
+  typedef typename CallableTraits<Callable>::StorageType CallableStorageType;
+
+  template <typename T>
+  class Impl : public MatcherInterface<T> {
+    using ResultType = decltype(CallableTraits<Callable>::template Invoke<T>(
+        std::declval<CallableStorageType>(), std::declval<T>()));
+
+   public:
+    template <typename M>
+    Impl(const CallableStorageType& callable, const M& matcher)
+        : callable_(callable), matcher_(MatcherCast<ResultType>(matcher)) {}
+
+    void DescribeTo(::std::ostream* os) const override {
+      *os << "is mapped by the given callable to a value that ";
+      matcher_.DescribeTo(os);
+    }
+
+    void DescribeNegationTo(::std::ostream* os) const override {
+      *os << "is mapped by the given callable to a value that ";
+      matcher_.DescribeNegationTo(os);
+    }
+
+    bool MatchAndExplain(T obj, MatchResultListener* listener) const override {
+      *listener << "which is mapped by the given callable to ";
+      // Cannot pass the return value directly to MatchPrintAndExplain, which
+      // takes a non-const reference as argument.
+      // Also, specifying template argument explicitly is needed because T could
+      // be a non-const reference (e.g. Matcher<Uncopyable&>).
+      ResultType result =
+          CallableTraits<Callable>::template Invoke<T>(callable_, obj);
+      return MatchPrintAndExplain(result, matcher_, listener);
+    }
+
+   private:
+    // Functors often define operator() as non-const method even though
+    // they are actually stateless. But we need to use them even when
+    // 'this' is a const pointer. It's the user's responsibility not to
+    // use stateful callables with ResultOf(), which doesn't guarantee
+    // how many times the callable will be invoked.
+    mutable CallableStorageType callable_;
+    const Matcher<ResultType> matcher_;
+  };  // class Impl
+
+  const CallableStorageType callable_;
+  const InnerMatcher matcher_;
+};
+
+// Implements a matcher that checks the size of an STL-style container.
+template <typename SizeMatcher>
+class SizeIsMatcher {
+ public:
+  explicit SizeIsMatcher(const SizeMatcher& size_matcher)
+       : size_matcher_(size_matcher) {
+  }
+
+  template <typename Container>
+  operator Matcher<Container>() const {
+    return Matcher<Container>(new Impl<const Container&>(size_matcher_));
+  }
+
+  template <typename Container>
+  class Impl : public MatcherInterface<Container> {
+   public:
+    using SizeType = decltype(std::declval<Container>().size());
+    explicit Impl(const SizeMatcher& size_matcher)
+        : size_matcher_(MatcherCast<SizeType>(size_matcher)) {}
+
+    void DescribeTo(::std::ostream* os) const override {
+      *os << "size ";
+      size_matcher_.DescribeTo(os);
+    }
+    void DescribeNegationTo(::std::ostream* os) const override {
+      *os << "size ";
+      size_matcher_.DescribeNegationTo(os);
+    }
+
+    bool MatchAndExplain(Container container,
+                         MatchResultListener* listener) const override {
+      SizeType size = container.size();
+      StringMatchResultListener size_listener;
+      const bool result = size_matcher_.MatchAndExplain(size, &size_listener);
+      *listener
+          << "whose size " << size << (result ? " matches" : " doesn't match");
+      PrintIfNotEmpty(size_listener.str(), listener->stream());
+      return result;
+    }
+
+   private:
+    const Matcher<SizeType> size_matcher_;
+  };
+
+ private:
+  const SizeMatcher size_matcher_;
+};
+
+// Implements a matcher that checks the begin()..end() distance of an STL-style
+// container.
+template <typename DistanceMatcher>
+class BeginEndDistanceIsMatcher {
+ public:
+  explicit BeginEndDistanceIsMatcher(const DistanceMatcher& distance_matcher)
+      : distance_matcher_(distance_matcher) {}
+
+  template <typename Container>
+  operator Matcher<Container>() const {
+    return Matcher<Container>(new Impl<const Container&>(distance_matcher_));
+  }
+
+  template <typename Container>
+  class Impl : public MatcherInterface<Container> {
+   public:
+    typedef internal::StlContainerView<
+        GTEST_REMOVE_REFERENCE_AND_CONST_(Container)> ContainerView;
+    typedef typename std::iterator_traits<
+        typename ContainerView::type::const_iterator>::difference_type
+        DistanceType;
+    explicit Impl(const DistanceMatcher& distance_matcher)
+        : distance_matcher_(MatcherCast<DistanceType>(distance_matcher)) {}
+
+    void DescribeTo(::std::ostream* os) const override {
+      *os << "distance between begin() and end() ";
+      distance_matcher_.DescribeTo(os);
+    }
+    void DescribeNegationTo(::std::ostream* os) const override {
+      *os << "distance between begin() and end() ";
+      distance_matcher_.DescribeNegationTo(os);
+    }
+
+    bool MatchAndExplain(Container container,
+                         MatchResultListener* listener) const override {
+      using std::begin;
+      using std::end;
+      DistanceType distance = std::distance(begin(container), end(container));
+      StringMatchResultListener distance_listener;
+      const bool result =
+          distance_matcher_.MatchAndExplain(distance, &distance_listener);
+      *listener << "whose distance between begin() and end() " << distance
+                << (result ? " matches" : " doesn't match");
+      PrintIfNotEmpty(distance_listener.str(), listener->stream());
+      return result;
+    }
+
+   private:
+    const Matcher<DistanceType> distance_matcher_;
+  };
+
+ private:
+  const DistanceMatcher distance_matcher_;
+};
+
+// Implements an equality matcher for any STL-style container whose elements
+// support ==. This matcher is like Eq(), but its failure explanations provide
+// more detailed information that is useful when the container is used as a set.
+// The failure message reports elements that are in one of the operands but not
+// the other. The failure messages do not report duplicate or out-of-order
+// elements in the containers (which don't properly matter to sets, but can
+// occur if the containers are vectors or lists, for example).
+//
+// Uses the container's const_iterator, value_type, operator ==,
+// begin(), and end().
+template <typename Container>
+class ContainerEqMatcher {
+ public:
+  typedef internal::StlContainerView<Container> View;
+  typedef typename View::type StlContainer;
+  typedef typename View::const_reference StlContainerReference;
+
+  static_assert(!std::is_const<Container>::value,
+                "Container type must not be const");
+  static_assert(!std::is_reference<Container>::value,
+                "Container type must not be a reference");
+
+  // We make a copy of expected in case the elements in it are modified
+  // after this matcher is created.
+  explicit ContainerEqMatcher(const Container& expected)
+      : expected_(View::Copy(expected)) {}
+
+  void DescribeTo(::std::ostream* os) const {
+    *os << "equals ";
+    UniversalPrint(expected_, os);
+  }
+  void DescribeNegationTo(::std::ostream* os) const {
+    *os << "does not equal ";
+    UniversalPrint(expected_, os);
+  }
+
+  template <typename LhsContainer>
+  bool MatchAndExplain(const LhsContainer& lhs,
+                       MatchResultListener* listener) const {
+    typedef internal::StlContainerView<
+        typename std::remove_const<LhsContainer>::type>
+        LhsView;
+    typedef typename LhsView::type LhsStlContainer;
+    StlContainerReference lhs_stl_container = LhsView::ConstReference(lhs);
+    if (lhs_stl_container == expected_)
+      return true;
+
+    ::std::ostream* const os = listener->stream();
+    if (os != nullptr) {
+      // Something is different. Check for extra values first.
+      bool printed_header = false;
+      for (typename LhsStlContainer::const_iterator it =
+               lhs_stl_container.begin();
+           it != lhs_stl_container.end(); ++it) {
+        if (internal::ArrayAwareFind(expected_.begin(), expected_.end(), *it) ==
+            expected_.end()) {
+          if (printed_header) {
+            *os << ", ";
+          } else {
+            *os << "which has these unexpected elements: ";
+            printed_header = true;
+          }
+          UniversalPrint(*it, os);
+        }
+      }
+
+      // Now check for missing values.
+      bool printed_header2 = false;
+      for (typename StlContainer::const_iterator it = expected_.begin();
+           it != expected_.end(); ++it) {
+        if (internal::ArrayAwareFind(
+                lhs_stl_container.begin(), lhs_stl_container.end(), *it) ==
+            lhs_stl_container.end()) {
+          if (printed_header2) {
+            *os << ", ";
+          } else {
+            *os << (printed_header ? ",\nand" : "which")
+                << " doesn't have these expected elements: ";
+            printed_header2 = true;
+          }
+          UniversalPrint(*it, os);
+        }
+      }
+    }
+
+    return false;
+  }
+
+ private:
+  const StlContainer expected_;
+};
+
+// A comparator functor that uses the < operator to compare two values.
+struct LessComparator {
+  template <typename T, typename U>
+  bool operator()(const T& lhs, const U& rhs) const { return lhs < rhs; }
+};
+
+// Implements WhenSortedBy(comparator, container_matcher).
+template <typename Comparator, typename ContainerMatcher>
+class WhenSortedByMatcher {
+ public:
+  WhenSortedByMatcher(const Comparator& comparator,
+                      const ContainerMatcher& matcher)
+      : comparator_(comparator), matcher_(matcher) {}
+
+  template <typename LhsContainer>
+  operator Matcher<LhsContainer>() const {
+    return MakeMatcher(new Impl<LhsContainer>(comparator_, matcher_));
+  }
+
+  template <typename LhsContainer>
+  class Impl : public MatcherInterface<LhsContainer> {
+   public:
+    typedef internal::StlContainerView<
+         GTEST_REMOVE_REFERENCE_AND_CONST_(LhsContainer)> LhsView;
+    typedef typename LhsView::type LhsStlContainer;
+    typedef typename LhsView::const_reference LhsStlContainerReference;
+    // Transforms std::pair<const Key, Value> into std::pair<Key, Value>
+    // so that we can match associative containers.
+    typedef typename RemoveConstFromKey<
+        typename LhsStlContainer::value_type>::type LhsValue;
+
+    Impl(const Comparator& comparator, const ContainerMatcher& matcher)
+        : comparator_(comparator), matcher_(matcher) {}
+
+    void DescribeTo(::std::ostream* os) const override {
+      *os << "(when sorted) ";
+      matcher_.DescribeTo(os);
+    }
+
+    void DescribeNegationTo(::std::ostream* os) const override {
+      *os << "(when sorted) ";
+      matcher_.DescribeNegationTo(os);
+    }
+
+    bool MatchAndExplain(LhsContainer lhs,
+                         MatchResultListener* listener) const override {
+      LhsStlContainerReference lhs_stl_container = LhsView::ConstReference(lhs);
+      ::std::vector<LhsValue> sorted_container(lhs_stl_container.begin(),
+                                               lhs_stl_container.end());
+      ::std::sort(
+           sorted_container.begin(), sorted_container.end(), comparator_);
+
+      if (!listener->IsInterested()) {
+        // If the listener is not interested, we do not need to
+        // construct the inner explanation.
+        return matcher_.Matches(sorted_container);
+      }
+
+      *listener << "which is ";
+      UniversalPrint(sorted_container, listener->stream());
+      *listener << " when sorted";
+
+      StringMatchResultListener inner_listener;
+      const bool match = matcher_.MatchAndExplain(sorted_container,
+                                                  &inner_listener);
+      PrintIfNotEmpty(inner_listener.str(), listener->stream());
+      return match;
+    }
+
+   private:
+    const Comparator comparator_;
+    const Matcher<const ::std::vector<LhsValue>&> matcher_;
+
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(Impl);
+  };
+
+ private:
+  const Comparator comparator_;
+  const ContainerMatcher matcher_;
+};
+
+// Implements Pointwise(tuple_matcher, rhs_container).  tuple_matcher
+// must be able to be safely cast to Matcher<std::tuple<const T1&, const
+// T2&> >, where T1 and T2 are the types of elements in the LHS
+// container and the RHS container respectively.
+template <typename TupleMatcher, typename RhsContainer>
+class PointwiseMatcher {
+  GTEST_COMPILE_ASSERT_(
+      !IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(RhsContainer)>::value,
+      use_UnorderedPointwise_with_hash_tables);
+
+ public:
+  typedef internal::StlContainerView<RhsContainer> RhsView;
+  typedef typename RhsView::type RhsStlContainer;
+  typedef typename RhsStlContainer::value_type RhsValue;
+
+  static_assert(!std::is_const<RhsContainer>::value,
+                "RhsContainer type must not be const");
+  static_assert(!std::is_reference<RhsContainer>::value,
+                "RhsContainer type must not be a reference");
+
+  // Like ContainerEq, we make a copy of rhs in case the elements in
+  // it are modified after this matcher is created.
+  PointwiseMatcher(const TupleMatcher& tuple_matcher, const RhsContainer& rhs)
+      : tuple_matcher_(tuple_matcher), rhs_(RhsView::Copy(rhs)) {}
+
+  template <typename LhsContainer>
+  operator Matcher<LhsContainer>() const {
+    GTEST_COMPILE_ASSERT_(
+        !IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(LhsContainer)>::value,
+        use_UnorderedPointwise_with_hash_tables);
+
+    return Matcher<LhsContainer>(
+        new Impl<const LhsContainer&>(tuple_matcher_, rhs_));
+  }
+
+  template <typename LhsContainer>
+  class Impl : public MatcherInterface<LhsContainer> {
+   public:
+    typedef internal::StlContainerView<
+         GTEST_REMOVE_REFERENCE_AND_CONST_(LhsContainer)> LhsView;
+    typedef typename LhsView::type LhsStlContainer;
+    typedef typename LhsView::const_reference LhsStlContainerReference;
+    typedef typename LhsStlContainer::value_type LhsValue;
+    // We pass the LHS value and the RHS value to the inner matcher by
+    // reference, as they may be expensive to copy.  We must use tuple
+    // instead of pair here, as a pair cannot hold references (C++ 98,
+    // 20.2.2 [lib.pairs]).
+    typedef ::std::tuple<const LhsValue&, const RhsValue&> InnerMatcherArg;
+
+    Impl(const TupleMatcher& tuple_matcher, const RhsStlContainer& rhs)
+        // mono_tuple_matcher_ holds a monomorphic version of the tuple matcher.
+        : mono_tuple_matcher_(SafeMatcherCast<InnerMatcherArg>(tuple_matcher)),
+          rhs_(rhs) {}
+
+    void DescribeTo(::std::ostream* os) const override {
+      *os << "contains " << rhs_.size()
+          << " values, where each value and its corresponding value in ";
+      UniversalPrinter<RhsStlContainer>::Print(rhs_, os);
+      *os << " ";
+      mono_tuple_matcher_.DescribeTo(os);
+    }
+    void DescribeNegationTo(::std::ostream* os) const override {
+      *os << "doesn't contain exactly " << rhs_.size()
+          << " values, or contains a value x at some index i"
+          << " where x and the i-th value of ";
+      UniversalPrint(rhs_, os);
+      *os << " ";
+      mono_tuple_matcher_.DescribeNegationTo(os);
+    }
+
+    bool MatchAndExplain(LhsContainer lhs,
+                         MatchResultListener* listener) const override {
+      LhsStlContainerReference lhs_stl_container = LhsView::ConstReference(lhs);
+      const size_t actual_size = lhs_stl_container.size();
+      if (actual_size != rhs_.size()) {
+        *listener << "which contains " << actual_size << " values";
+        return false;
+      }
+
+      typename LhsStlContainer::const_iterator left = lhs_stl_container.begin();
+      typename RhsStlContainer::const_iterator right = rhs_.begin();
+      for (size_t i = 0; i != actual_size; ++i, ++left, ++right) {
+        if (listener->IsInterested()) {
+          StringMatchResultListener inner_listener;
+          // Create InnerMatcherArg as a temporarily object to avoid it outlives
+          // *left and *right. Dereference or the conversion to `const T&` may
+          // return temp objects, e.g for vector<bool>.
+          if (!mono_tuple_matcher_.MatchAndExplain(
+                  InnerMatcherArg(ImplicitCast_<const LhsValue&>(*left),
+                                  ImplicitCast_<const RhsValue&>(*right)),
+                  &inner_listener)) {
+            *listener << "where the value pair (";
+            UniversalPrint(*left, listener->stream());
+            *listener << ", ";
+            UniversalPrint(*right, listener->stream());
+            *listener << ") at index #" << i << " don't match";
+            PrintIfNotEmpty(inner_listener.str(), listener->stream());
+            return false;
+          }
+        } else {
+          if (!mono_tuple_matcher_.Matches(
+                  InnerMatcherArg(ImplicitCast_<const LhsValue&>(*left),
+                                  ImplicitCast_<const RhsValue&>(*right))))
+            return false;
+        }
+      }
+
+      return true;
+    }
+
+   private:
+    const Matcher<InnerMatcherArg> mono_tuple_matcher_;
+    const RhsStlContainer rhs_;
+  };
+
+ private:
+  const TupleMatcher tuple_matcher_;
+  const RhsStlContainer rhs_;
+};
+
+// Holds the logic common to ContainsMatcherImpl and EachMatcherImpl.
+template <typename Container>
+class QuantifierMatcherImpl : public MatcherInterface<Container> {
+ public:
+  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
+  typedef StlContainerView<RawContainer> View;
+  typedef typename View::type StlContainer;
+  typedef typename View::const_reference StlContainerReference;
+  typedef typename StlContainer::value_type Element;
+
+  template <typename InnerMatcher>
+  explicit QuantifierMatcherImpl(InnerMatcher inner_matcher)
+      : inner_matcher_(
+           testing::SafeMatcherCast<const Element&>(inner_matcher)) {}
+
+  // Checks whether:
+  // * All elements in the container match, if all_elements_should_match.
+  // * Any element in the container matches, if !all_elements_should_match.
+  bool MatchAndExplainImpl(bool all_elements_should_match,
+                           Container container,
+                           MatchResultListener* listener) const {
+    StlContainerReference stl_container = View::ConstReference(container);
+    size_t i = 0;
+    for (typename StlContainer::const_iterator it = stl_container.begin();
+         it != stl_container.end(); ++it, ++i) {
+      StringMatchResultListener inner_listener;
+      const bool matches = inner_matcher_.MatchAndExplain(*it, &inner_listener);
+
+      if (matches != all_elements_should_match) {
+        *listener << "whose element #" << i
+                  << (matches ? " matches" : " doesn't match");
+        PrintIfNotEmpty(inner_listener.str(), listener->stream());
+        return !all_elements_should_match;
+      }
+    }
+    return all_elements_should_match;
+  }
+
+ protected:
+  const Matcher<const Element&> inner_matcher_;
+};
+
+// Implements Contains(element_matcher) for the given argument type Container.
+// Symmetric to EachMatcherImpl.
+template <typename Container>
+class ContainsMatcherImpl : public QuantifierMatcherImpl<Container> {
+ public:
+  template <typename InnerMatcher>
+  explicit ContainsMatcherImpl(InnerMatcher inner_matcher)
+      : QuantifierMatcherImpl<Container>(inner_matcher) {}
+
+  // Describes what this matcher does.
+  void DescribeTo(::std::ostream* os) const override {
+    *os << "contains at least one element that ";
+    this->inner_matcher_.DescribeTo(os);
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const override {
+    *os << "doesn't contain any element that ";
+    this->inner_matcher_.DescribeTo(os);
+  }
+
+  bool MatchAndExplain(Container container,
+                       MatchResultListener* listener) const override {
+    return this->MatchAndExplainImpl(false, container, listener);
+  }
+};
+
+// Implements Each(element_matcher) for the given argument type Container.
+// Symmetric to ContainsMatcherImpl.
+template <typename Container>
+class EachMatcherImpl : public QuantifierMatcherImpl<Container> {
+ public:
+  template <typename InnerMatcher>
+  explicit EachMatcherImpl(InnerMatcher inner_matcher)
+      : QuantifierMatcherImpl<Container>(inner_matcher) {}
+
+  // Describes what this matcher does.
+  void DescribeTo(::std::ostream* os) const override {
+    *os << "only contains elements that ";
+    this->inner_matcher_.DescribeTo(os);
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const override {
+    *os << "contains some element that ";
+    this->inner_matcher_.DescribeNegationTo(os);
+  }
+
+  bool MatchAndExplain(Container container,
+                       MatchResultListener* listener) const override {
+    return this->MatchAndExplainImpl(true, container, listener);
+  }
+};
+
+// Implements polymorphic Contains(element_matcher).
+template <typename M>
+class ContainsMatcher {
+ public:
+  explicit ContainsMatcher(M m) : inner_matcher_(m) {}
+
+  template <typename Container>
+  operator Matcher<Container>() const {
+    return Matcher<Container>(
+        new ContainsMatcherImpl<const Container&>(inner_matcher_));
+  }
+
+ private:
+  const M inner_matcher_;
+};
+
+// Implements polymorphic Each(element_matcher).
+template <typename M>
+class EachMatcher {
+ public:
+  explicit EachMatcher(M m) : inner_matcher_(m) {}
+
+  template <typename Container>
+  operator Matcher<Container>() const {
+    return Matcher<Container>(
+        new EachMatcherImpl<const Container&>(inner_matcher_));
+  }
+
+ private:
+  const M inner_matcher_;
+};
+
+struct Rank1 {};
+struct Rank0 : Rank1 {};
+
+namespace pair_getters {
+using std::get;
+template <typename T>
+auto First(T& x, Rank1) -> decltype(get<0>(x)) {  // NOLINT
+  return get<0>(x);
+}
+template <typename T>
+auto First(T& x, Rank0) -> decltype((x.first)) {  // NOLINT
+  return x.first;
+}
+
+template <typename T>
+auto Second(T& x, Rank1) -> decltype(get<1>(x)) {  // NOLINT
+  return get<1>(x);
+}
+template <typename T>
+auto Second(T& x, Rank0) -> decltype((x.second)) {  // NOLINT
+  return x.second;
+}
+}  // namespace pair_getters
+
+// Implements Key(inner_matcher) for the given argument pair type.
+// Key(inner_matcher) matches an std::pair whose 'first' field matches
+// inner_matcher.  For example, Contains(Key(Ge(5))) can be used to match an
+// std::map that contains at least one element whose key is >= 5.
+template <typename PairType>
+class KeyMatcherImpl : public MatcherInterface<PairType> {
+ public:
+  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(PairType) RawPairType;
+  typedef typename RawPairType::first_type KeyType;
+
+  template <typename InnerMatcher>
+  explicit KeyMatcherImpl(InnerMatcher inner_matcher)
+      : inner_matcher_(
+          testing::SafeMatcherCast<const KeyType&>(inner_matcher)) {
+  }
+
+  // Returns true if and only if 'key_value.first' (the key) matches the inner
+  // matcher.
+  bool MatchAndExplain(PairType key_value,
+                       MatchResultListener* listener) const override {
+    StringMatchResultListener inner_listener;
+    const bool match = inner_matcher_.MatchAndExplain(
+        pair_getters::First(key_value, Rank0()), &inner_listener);
+    const std::string explanation = inner_listener.str();
+    if (explanation != "") {
+      *listener << "whose first field is a value " << explanation;
+    }
+    return match;
+  }
+
+  // Describes what this matcher does.
+  void DescribeTo(::std::ostream* os) const override {
+    *os << "has a key that ";
+    inner_matcher_.DescribeTo(os);
+  }
+
+  // Describes what the negation of this matcher does.
+  void DescribeNegationTo(::std::ostream* os) const override {
+    *os << "doesn't have a key that ";
+    inner_matcher_.DescribeTo(os);
+  }
+
+ private:
+  const Matcher<const KeyType&> inner_matcher_;
+};
+
+// Implements polymorphic Key(matcher_for_key).
+template <typename M>
+class KeyMatcher {
+ public:
+  explicit KeyMatcher(M m) : matcher_for_key_(m) {}
+
+  template <typename PairType>
+  operator Matcher<PairType>() const {
+    return Matcher<PairType>(
+        new KeyMatcherImpl<const PairType&>(matcher_for_key_));
+  }
+
+ private:
+  const M matcher_for_key_;
+};
+
+// Implements polymorphic Address(matcher_for_address).
+template <typename InnerMatcher>
+class AddressMatcher {
+ public:
+  explicit AddressMatcher(InnerMatcher m) : matcher_(m) {}
+
+  template <typename Type>
+  operator Matcher<Type>() const {  // NOLINT
+    return Matcher<Type>(new Impl<const Type&>(matcher_));
+  }
+
+ private:
+  // The monomorphic implementation that works for a particular object type.
+  template <typename Type>
+  class Impl : public MatcherInterface<Type> {
+   public:
+    using Address = const GTEST_REMOVE_REFERENCE_AND_CONST_(Type) *;
+    explicit Impl(const InnerMatcher& matcher)
+        : matcher_(MatcherCast<Address>(matcher)) {}
+
+    void DescribeTo(::std::ostream* os) const override {
+      *os << "has address that ";
+      matcher_.DescribeTo(os);
+    }
+
+    void DescribeNegationTo(::std::ostream* os) const override {
+      *os << "does not have address that ";
+      matcher_.DescribeTo(os);
+    }
+
+    bool MatchAndExplain(Type object,
+                         MatchResultListener* listener) const override {
+      *listener << "which has address ";
+      Address address = std::addressof(object);
+      return MatchPrintAndExplain(address, matcher_, listener);
+    }
+
+   private:
+    const Matcher<Address> matcher_;
+  };
+  const InnerMatcher matcher_;
+};
+
+// Implements Pair(first_matcher, second_matcher) for the given argument pair
+// type with its two matchers. See Pair() function below.
+template <typename PairType>
+class PairMatcherImpl : public MatcherInterface<PairType> {
+ public:
+  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(PairType) RawPairType;
+  typedef typename RawPairType::first_type FirstType;
+  typedef typename RawPairType::second_type SecondType;
+
+  template <typename FirstMatcher, typename SecondMatcher>
+  PairMatcherImpl(FirstMatcher first_matcher, SecondMatcher second_matcher)
+      : first_matcher_(
+            testing::SafeMatcherCast<const FirstType&>(first_matcher)),
+        second_matcher_(
+            testing::SafeMatcherCast<const SecondType&>(second_matcher)) {
+  }
+
+  // Describes what this matcher does.
+  void DescribeTo(::std::ostream* os) const override {
+    *os << "has a first field that ";
+    first_matcher_.DescribeTo(os);
+    *os << ", and has a second field that ";
+    second_matcher_.DescribeTo(os);
+  }
+
+  // Describes what the negation of this matcher does.
+  void DescribeNegationTo(::std::ostream* os) const override {
+    *os << "has a first field that ";
+    first_matcher_.DescribeNegationTo(os);
+    *os << ", or has a second field that ";
+    second_matcher_.DescribeNegationTo(os);
+  }
+
+  // Returns true if and only if 'a_pair.first' matches first_matcher and
+  // 'a_pair.second' matches second_matcher.
+  bool MatchAndExplain(PairType a_pair,
+                       MatchResultListener* listener) const override {
+    if (!listener->IsInterested()) {
+      // If the listener is not interested, we don't need to construct the
+      // explanation.
+      return first_matcher_.Matches(pair_getters::First(a_pair, Rank0())) &&
+             second_matcher_.Matches(pair_getters::Second(a_pair, Rank0()));
+    }
+    StringMatchResultListener first_inner_listener;
+    if (!first_matcher_.MatchAndExplain(pair_getters::First(a_pair, Rank0()),
+                                        &first_inner_listener)) {
+      *listener << "whose first field does not match";
+      PrintIfNotEmpty(first_inner_listener.str(), listener->stream());
+      return false;
+    }
+    StringMatchResultListener second_inner_listener;
+    if (!second_matcher_.MatchAndExplain(pair_getters::Second(a_pair, Rank0()),
+                                         &second_inner_listener)) {
+      *listener << "whose second field does not match";
+      PrintIfNotEmpty(second_inner_listener.str(), listener->stream());
+      return false;
+    }
+    ExplainSuccess(first_inner_listener.str(), second_inner_listener.str(),
+                   listener);
+    return true;
+  }
+
+ private:
+  void ExplainSuccess(const std::string& first_explanation,
+                      const std::string& second_explanation,
+                      MatchResultListener* listener) const {
+    *listener << "whose both fields match";
+    if (first_explanation != "") {
+      *listener << ", where the first field is a value " << first_explanation;
+    }
+    if (second_explanation != "") {
+      *listener << ", ";
+      if (first_explanation != "") {
+        *listener << "and ";
+      } else {
+        *listener << "where ";
+      }
+      *listener << "the second field is a value " << second_explanation;
+    }
+  }
+
+  const Matcher<const FirstType&> first_matcher_;
+  const Matcher<const SecondType&> second_matcher_;
+};
+
+// Implements polymorphic Pair(first_matcher, second_matcher).
+template <typename FirstMatcher, typename SecondMatcher>
+class PairMatcher {
+ public:
+  PairMatcher(FirstMatcher first_matcher, SecondMatcher second_matcher)
+      : first_matcher_(first_matcher), second_matcher_(second_matcher) {}
+
+  template <typename PairType>
+  operator Matcher<PairType> () const {
+    return Matcher<PairType>(
+        new PairMatcherImpl<const PairType&>(first_matcher_, second_matcher_));
+  }
+
+ private:
+  const FirstMatcher first_matcher_;
+  const SecondMatcher second_matcher_;
+};
+
+template <typename T, size_t... I>
+auto UnpackStructImpl(const T& t, IndexSequence<I...>, int)
+    -> decltype(std::tie(get<I>(t)...)) {
+  static_assert(std::tuple_size<T>::value == sizeof...(I),
+                "Number of arguments doesn't match the number of fields.");
+  return std::tie(get<I>(t)...);
+}
+
+#if defined(__cpp_structured_bindings) && __cpp_structured_bindings >= 201606
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<1>, char) {
+  const auto& [a] = t;
+  return std::tie(a);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<2>, char) {
+  const auto& [a, b] = t;
+  return std::tie(a, b);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<3>, char) {
+  const auto& [a, b, c] = t;
+  return std::tie(a, b, c);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<4>, char) {
+  const auto& [a, b, c, d] = t;
+  return std::tie(a, b, c, d);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<5>, char) {
+  const auto& [a, b, c, d, e] = t;
+  return std::tie(a, b, c, d, e);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<6>, char) {
+  const auto& [a, b, c, d, e, f] = t;
+  return std::tie(a, b, c, d, e, f);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<7>, char) {
+  const auto& [a, b, c, d, e, f, g] = t;
+  return std::tie(a, b, c, d, e, f, g);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<8>, char) {
+  const auto& [a, b, c, d, e, f, g, h] = t;
+  return std::tie(a, b, c, d, e, f, g, h);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<9>, char) {
+  const auto& [a, b, c, d, e, f, g, h, i] = t;
+  return std::tie(a, b, c, d, e, f, g, h, i);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<10>, char) {
+  const auto& [a, b, c, d, e, f, g, h, i, j] = t;
+  return std::tie(a, b, c, d, e, f, g, h, i, j);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<11>, char) {
+  const auto& [a, b, c, d, e, f, g, h, i, j, k] = t;
+  return std::tie(a, b, c, d, e, f, g, h, i, j, k);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<12>, char) {
+  const auto& [a, b, c, d, e, f, g, h, i, j, k, l] = t;
+  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<13>, char) {
+  const auto& [a, b, c, d, e, f, g, h, i, j, k, l, m] = t;
+  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l, m);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<14>, char) {
+  const auto& [a, b, c, d, e, f, g, h, i, j, k, l, m, n] = t;
+  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l, m, n);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<15>, char) {
+  const auto& [a, b, c, d, e, f, g, h, i, j, k, l, m, n, o] = t;
+  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o);
+}
+template <typename T>
+auto UnpackStructImpl(const T& t, MakeIndexSequence<16>, char) {
+  const auto& [a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p] = t;
+  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p);
+}
+#endif  // defined(__cpp_structured_bindings)
+
+template <size_t I, typename T>
+auto UnpackStruct(const T& t)
+    -> decltype((UnpackStructImpl)(t, MakeIndexSequence<I>{}, 0)) {
+  return (UnpackStructImpl)(t, MakeIndexSequence<I>{}, 0);
+}
+
+// Helper function to do comma folding in C++11.
+// The array ensures left-to-right order of evaluation.
+// Usage: VariadicExpand({expr...});
+template <typename T, size_t N>
+void VariadicExpand(const T (&)[N]) {}
+
+template <typename Struct, typename StructSize>
+class FieldsAreMatcherImpl;
+
+template <typename Struct, size_t... I>
+class FieldsAreMatcherImpl<Struct, IndexSequence<I...>>
+    : public MatcherInterface<Struct> {
+  using UnpackedType =
+      decltype(UnpackStruct<sizeof...(I)>(std::declval<const Struct&>()));
+  using MatchersType = std::tuple<
+      Matcher<const typename std::tuple_element<I, UnpackedType>::type&>...>;
+
+ public:
+  template <typename Inner>
+  explicit FieldsAreMatcherImpl(const Inner& matchers)
+      : matchers_(testing::SafeMatcherCast<
+                  const typename std::tuple_element<I, UnpackedType>::type&>(
+            std::get<I>(matchers))...) {}
+
+  void DescribeTo(::std::ostream* os) const override {
+    const char* separator = "";
+    VariadicExpand(
+        {(*os << separator << "has field #" << I << " that ",
+          std::get<I>(matchers_).DescribeTo(os), separator = ", and ")...});
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const override {
+    const char* separator = "";
+    VariadicExpand({(*os << separator << "has field #" << I << " that ",
+                     std::get<I>(matchers_).DescribeNegationTo(os),
+                     separator = ", or ")...});
+  }
+
+  bool MatchAndExplain(Struct t, MatchResultListener* listener) const override {
+    return MatchInternal((UnpackStruct<sizeof...(I)>)(t), listener);
+  }
+
+ private:
+  bool MatchInternal(UnpackedType tuple, MatchResultListener* listener) const {
+    if (!listener->IsInterested()) {
+      // If the listener is not interested, we don't need to construct the
+      // explanation.
+      bool good = true;
+      VariadicExpand({good = good && std::get<I>(matchers_).Matches(
+                                         std::get<I>(tuple))...});
+      return good;
+    }
+
+    size_t failed_pos = ~size_t{};
+
+    std::vector<StringMatchResultListener> inner_listener(sizeof...(I));
+
+    VariadicExpand(
+        {failed_pos == ~size_t{} && !std::get<I>(matchers_).MatchAndExplain(
+                                        std::get<I>(tuple), &inner_listener[I])
+             ? failed_pos = I
+             : 0 ...});
+    if (failed_pos != ~size_t{}) {
+      *listener << "whose field #" << failed_pos << " does not match";
+      PrintIfNotEmpty(inner_listener[failed_pos].str(), listener->stream());
+      return false;
+    }
+
+    *listener << "whose all elements match";
+    const char* separator = ", where";
+    for (size_t index = 0; index < sizeof...(I); ++index) {
+      const std::string str = inner_listener[index].str();
+      if (!str.empty()) {
+        *listener << separator << " field #" << index << " is a value " << str;
+        separator = ", and";
+      }
+    }
+
+    return true;
+  }
+
+  MatchersType matchers_;
+};
+
+template <typename... Inner>
+class FieldsAreMatcher {
+ public:
+  explicit FieldsAreMatcher(Inner... inner) : matchers_(std::move(inner)...) {}
+
+  template <typename Struct>
+  operator Matcher<Struct>() const {  // NOLINT
+    return Matcher<Struct>(
+        new FieldsAreMatcherImpl<const Struct&, IndexSequenceFor<Inner...>>(
+            matchers_));
+  }
+
+ private:
+  std::tuple<Inner...> matchers_;
+};
+
+// Implements ElementsAre() and ElementsAreArray().
+template <typename Container>
+class ElementsAreMatcherImpl : public MatcherInterface<Container> {
+ public:
+  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
+  typedef internal::StlContainerView<RawContainer> View;
+  typedef typename View::type StlContainer;
+  typedef typename View::const_reference StlContainerReference;
+  typedef typename StlContainer::value_type Element;
+
+  // Constructs the matcher from a sequence of element values or
+  // element matchers.
+  template <typename InputIter>
+  ElementsAreMatcherImpl(InputIter first, InputIter last) {
+    while (first != last) {
+      matchers_.push_back(MatcherCast<const Element&>(*first++));
+    }
+  }
+
+  // Describes what this matcher does.
+  void DescribeTo(::std::ostream* os) const override {
+    if (count() == 0) {
+      *os << "is empty";
+    } else if (count() == 1) {
+      *os << "has 1 element that ";
+      matchers_[0].DescribeTo(os);
+    } else {
+      *os << "has " << Elements(count()) << " where\n";
+      for (size_t i = 0; i != count(); ++i) {
+        *os << "element #" << i << " ";
+        matchers_[i].DescribeTo(os);
+        if (i + 1 < count()) {
+          *os << ",\n";
+        }
+      }
+    }
+  }
+
+  // Describes what the negation of this matcher does.
+  void DescribeNegationTo(::std::ostream* os) const override {
+    if (count() == 0) {
+      *os << "isn't empty";
+      return;
+    }
+
+    *os << "doesn't have " << Elements(count()) << ", or\n";
+    for (size_t i = 0; i != count(); ++i) {
+      *os << "element #" << i << " ";
+      matchers_[i].DescribeNegationTo(os);
+      if (i + 1 < count()) {
+        *os << ", or\n";
+      }
+    }
+  }
+
+  bool MatchAndExplain(Container container,
+                       MatchResultListener* listener) const override {
+    // To work with stream-like "containers", we must only walk
+    // through the elements in one pass.
+
+    const bool listener_interested = listener->IsInterested();
+
+    // explanations[i] is the explanation of the element at index i.
+    ::std::vector<std::string> explanations(count());
+    StlContainerReference stl_container = View::ConstReference(container);
+    typename StlContainer::const_iterator it = stl_container.begin();
+    size_t exam_pos = 0;
+    bool mismatch_found = false;  // Have we found a mismatched element yet?
+
+    // Go through the elements and matchers in pairs, until we reach
+    // the end of either the elements or the matchers, or until we find a
+    // mismatch.
+    for (; it != stl_container.end() && exam_pos != count(); ++it, ++exam_pos) {
+      bool match;  // Does the current element match the current matcher?
+      if (listener_interested) {
+        StringMatchResultListener s;
+        match = matchers_[exam_pos].MatchAndExplain(*it, &s);
+        explanations[exam_pos] = s.str();
+      } else {
+        match = matchers_[exam_pos].Matches(*it);
+      }
+
+      if (!match) {
+        mismatch_found = true;
+        break;
+      }
+    }
+    // If mismatch_found is true, 'exam_pos' is the index of the mismatch.
+
+    // Find how many elements the actual container has.  We avoid
+    // calling size() s.t. this code works for stream-like "containers"
+    // that don't define size().
+    size_t actual_count = exam_pos;
+    for (; it != stl_container.end(); ++it) {
+      ++actual_count;
+    }
+
+    if (actual_count != count()) {
+      // The element count doesn't match.  If the container is empty,
+      // there's no need to explain anything as Google Mock already
+      // prints the empty container.  Otherwise we just need to show
+      // how many elements there actually are.
+      if (listener_interested && (actual_count != 0)) {
+        *listener << "which has " << Elements(actual_count);
+      }
+      return false;
+    }
+
+    if (mismatch_found) {
+      // The element count matches, but the exam_pos-th element doesn't match.
+      if (listener_interested) {
+        *listener << "whose element #" << exam_pos << " doesn't match";
+        PrintIfNotEmpty(explanations[exam_pos], listener->stream());
+      }
+      return false;
+    }
+
+    // Every element matches its expectation.  We need to explain why
+    // (the obvious ones can be skipped).
+    if (listener_interested) {
+      bool reason_printed = false;
+      for (size_t i = 0; i != count(); ++i) {
+        const std::string& s = explanations[i];
+        if (!s.empty()) {
+          if (reason_printed) {
+            *listener << ",\nand ";
+          }
+          *listener << "whose element #" << i << " matches, " << s;
+          reason_printed = true;
+        }
+      }
+    }
+    return true;
+  }
+
+ private:
+  static Message Elements(size_t count) {
+    return Message() << count << (count == 1 ? " element" : " elements");
+  }
+
+  size_t count() const { return matchers_.size(); }
+
+  ::std::vector<Matcher<const Element&> > matchers_;
+};
+
+// Connectivity matrix of (elements X matchers), in element-major order.
+// Initially, there are no edges.
+// Use NextGraph() to iterate over all possible edge configurations.
+// Use Randomize() to generate a random edge configuration.
+class GTEST_API_ MatchMatrix {
+ public:
+  MatchMatrix(size_t num_elements, size_t num_matchers)
+      : num_elements_(num_elements),
+        num_matchers_(num_matchers),
+        matched_(num_elements_* num_matchers_, 0) {
+  }
+
+  size_t LhsSize() const { return num_elements_; }
+  size_t RhsSize() const { return num_matchers_; }
+  bool HasEdge(size_t ilhs, size_t irhs) const {
+    return matched_[SpaceIndex(ilhs, irhs)] == 1;
+  }
+  void SetEdge(size_t ilhs, size_t irhs, bool b) {
+    matched_[SpaceIndex(ilhs, irhs)] = b ? 1 : 0;
+  }
+
+  // Treating the connectivity matrix as a (LhsSize()*RhsSize())-bit number,
+  // adds 1 to that number; returns false if incrementing the graph left it
+  // empty.
+  bool NextGraph();
+
+  void Randomize();
+
+  std::string DebugString() const;
+
+ private:
+  size_t SpaceIndex(size_t ilhs, size_t irhs) const {
+    return ilhs * num_matchers_ + irhs;
+  }
+
+  size_t num_elements_;
+  size_t num_matchers_;
+
+  // Each element is a char interpreted as bool. They are stored as a
+  // flattened array in lhs-major order, use 'SpaceIndex()' to translate
+  // a (ilhs, irhs) matrix coordinate into an offset.
+  ::std::vector<char> matched_;
+};
+
+typedef ::std::pair<size_t, size_t> ElementMatcherPair;
+typedef ::std::vector<ElementMatcherPair> ElementMatcherPairs;
+
+// Returns a maximum bipartite matching for the specified graph 'g'.
+// The matching is represented as a vector of {element, matcher} pairs.
+GTEST_API_ ElementMatcherPairs
+FindMaxBipartiteMatching(const MatchMatrix& g);
+
+struct UnorderedMatcherRequire {
+  enum Flags {
+    Superset = 1 << 0,
+    Subset = 1 << 1,
+    ExactMatch = Superset | Subset,
+  };
+};
+
+// Untyped base class for implementing UnorderedElementsAre.  By
+// putting logic that's not specific to the element type here, we
+// reduce binary bloat and increase compilation speed.
+class GTEST_API_ UnorderedElementsAreMatcherImplBase {
+ protected:
+  explicit UnorderedElementsAreMatcherImplBase(
+      UnorderedMatcherRequire::Flags matcher_flags)
+      : match_flags_(matcher_flags) {}
+
+  // A vector of matcher describers, one for each element matcher.
+  // Does not own the describers (and thus can be used only when the
+  // element matchers are alive).
+  typedef ::std::vector<const MatcherDescriberInterface*> MatcherDescriberVec;
+
+  // Describes this UnorderedElementsAre matcher.
+  void DescribeToImpl(::std::ostream* os) const;
+
+  // Describes the negation of this UnorderedElementsAre matcher.
+  void DescribeNegationToImpl(::std::ostream* os) const;
+
+  bool VerifyMatchMatrix(const ::std::vector<std::string>& element_printouts,
+                         const MatchMatrix& matrix,
+                         MatchResultListener* listener) const;
+
+  bool FindPairing(const MatchMatrix& matrix,
+                   MatchResultListener* listener) const;
+
+  MatcherDescriberVec& matcher_describers() {
+    return matcher_describers_;
+  }
+
+  static Message Elements(size_t n) {
+    return Message() << n << " element" << (n == 1 ? "" : "s");
+  }
+
+  UnorderedMatcherRequire::Flags match_flags() const { return match_flags_; }
+
+ private:
+  UnorderedMatcherRequire::Flags match_flags_;
+  MatcherDescriberVec matcher_describers_;
+};
+
+// Implements UnorderedElementsAre, UnorderedElementsAreArray, IsSubsetOf, and
+// IsSupersetOf.
+template <typename Container>
+class UnorderedElementsAreMatcherImpl
+    : public MatcherInterface<Container>,
+      public UnorderedElementsAreMatcherImplBase {
+ public:
+  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
+  typedef internal::StlContainerView<RawContainer> View;
+  typedef typename View::type StlContainer;
+  typedef typename View::const_reference StlContainerReference;
+  typedef typename StlContainer::const_iterator StlContainerConstIterator;
+  typedef typename StlContainer::value_type Element;
+
+  template <typename InputIter>
+  UnorderedElementsAreMatcherImpl(UnorderedMatcherRequire::Flags matcher_flags,
+                                  InputIter first, InputIter last)
+      : UnorderedElementsAreMatcherImplBase(matcher_flags) {
+    for (; first != last; ++first) {
+      matchers_.push_back(MatcherCast<const Element&>(*first));
+    }
+    for (const auto& m : matchers_) {
+      matcher_describers().push_back(m.GetDescriber());
+    }
+  }
+
+  // Describes what this matcher does.
+  void DescribeTo(::std::ostream* os) const override {
+    return UnorderedElementsAreMatcherImplBase::DescribeToImpl(os);
+  }
+
+  // Describes what the negation of this matcher does.
+  void DescribeNegationTo(::std::ostream* os) const override {
+    return UnorderedElementsAreMatcherImplBase::DescribeNegationToImpl(os);
+  }
+
+  bool MatchAndExplain(Container container,
+                       MatchResultListener* listener) const override {
+    StlContainerReference stl_container = View::ConstReference(container);
+    ::std::vector<std::string> element_printouts;
+    MatchMatrix matrix =
+        AnalyzeElements(stl_container.begin(), stl_container.end(),
+                        &element_printouts, listener);
+
+    if (matrix.LhsSize() == 0 && matrix.RhsSize() == 0) {
+      return true;
+    }
+
+    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
+      if (matrix.LhsSize() != matrix.RhsSize()) {
+        // The element count doesn't match.  If the container is empty,
+        // there's no need to explain anything as Google Mock already
+        // prints the empty container. Otherwise we just need to show
+        // how many elements there actually are.
+        if (matrix.LhsSize() != 0 && listener->IsInterested()) {
+          *listener << "which has " << Elements(matrix.LhsSize());
+        }
+        return false;
+      }
+    }
+
+    return VerifyMatchMatrix(element_printouts, matrix, listener) &&
+           FindPairing(matrix, listener);
+  }
+
+ private:
+  template <typename ElementIter>
+  MatchMatrix AnalyzeElements(ElementIter elem_first, ElementIter elem_last,
+                              ::std::vector<std::string>* element_printouts,
+                              MatchResultListener* listener) const {
+    element_printouts->clear();
+    ::std::vector<char> did_match;
+    size_t num_elements = 0;
+    DummyMatchResultListener dummy;
+    for (; elem_first != elem_last; ++num_elements, ++elem_first) {
+      if (listener->IsInterested()) {
+        element_printouts->push_back(PrintToString(*elem_first));
+      }
+      for (size_t irhs = 0; irhs != matchers_.size(); ++irhs) {
+        did_match.push_back(
+            matchers_[irhs].MatchAndExplain(*elem_first, &dummy));
+      }
+    }
+
+    MatchMatrix matrix(num_elements, matchers_.size());
+    ::std::vector<char>::const_iterator did_match_iter = did_match.begin();
+    for (size_t ilhs = 0; ilhs != num_elements; ++ilhs) {
+      for (size_t irhs = 0; irhs != matchers_.size(); ++irhs) {
+        matrix.SetEdge(ilhs, irhs, *did_match_iter++ != 0);
+      }
+    }
+    return matrix;
+  }
+
+  ::std::vector<Matcher<const Element&> > matchers_;
+};
+
+// Functor for use in TransformTuple.
+// Performs MatcherCast<Target> on an input argument of any type.
+template <typename Target>
+struct CastAndAppendTransform {
+  template <typename Arg>
+  Matcher<Target> operator()(const Arg& a) const {
+    return MatcherCast<Target>(a);
+  }
+};
+
+// Implements UnorderedElementsAre.
+template <typename MatcherTuple>
+class UnorderedElementsAreMatcher {
+ public:
+  explicit UnorderedElementsAreMatcher(const MatcherTuple& args)
+      : matchers_(args) {}
+
+  template <typename Container>
+  operator Matcher<Container>() const {
+    typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
+    typedef typename internal::StlContainerView<RawContainer>::type View;
+    typedef typename View::value_type Element;
+    typedef ::std::vector<Matcher<const Element&> > MatcherVec;
+    MatcherVec matchers;
+    matchers.reserve(::std::tuple_size<MatcherTuple>::value);
+    TransformTupleValues(CastAndAppendTransform<const Element&>(), matchers_,
+                         ::std::back_inserter(matchers));
+    return Matcher<Container>(
+        new UnorderedElementsAreMatcherImpl<const Container&>(
+            UnorderedMatcherRequire::ExactMatch, matchers.begin(),
+            matchers.end()));
+  }
+
+ private:
+  const MatcherTuple matchers_;
+};
+
+// Implements ElementsAre.
+template <typename MatcherTuple>
+class ElementsAreMatcher {
+ public:
+  explicit ElementsAreMatcher(const MatcherTuple& args) : matchers_(args) {}
+
+  template <typename Container>
+  operator Matcher<Container>() const {
+    GTEST_COMPILE_ASSERT_(
+        !IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(Container)>::value ||
+            ::std::tuple_size<MatcherTuple>::value < 2,
+        use_UnorderedElementsAre_with_hash_tables);
+
+    typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
+    typedef typename internal::StlContainerView<RawContainer>::type View;
+    typedef typename View::value_type Element;
+    typedef ::std::vector<Matcher<const Element&> > MatcherVec;
+    MatcherVec matchers;
+    matchers.reserve(::std::tuple_size<MatcherTuple>::value);
+    TransformTupleValues(CastAndAppendTransform<const Element&>(), matchers_,
+                         ::std::back_inserter(matchers));
+    return Matcher<Container>(new ElementsAreMatcherImpl<const Container&>(
+        matchers.begin(), matchers.end()));
+  }
+
+ private:
+  const MatcherTuple matchers_;
+};
+
+// Implements UnorderedElementsAreArray(), IsSubsetOf(), and IsSupersetOf().
+template <typename T>
+class UnorderedElementsAreArrayMatcher {
+ public:
+  template <typename Iter>
+  UnorderedElementsAreArrayMatcher(UnorderedMatcherRequire::Flags match_flags,
+                                   Iter first, Iter last)
+      : match_flags_(match_flags), matchers_(first, last) {}
+
+  template <typename Container>
+  operator Matcher<Container>() const {
+    return Matcher<Container>(
+        new UnorderedElementsAreMatcherImpl<const Container&>(
+            match_flags_, matchers_.begin(), matchers_.end()));
+  }
+
+ private:
+  UnorderedMatcherRequire::Flags match_flags_;
+  ::std::vector<T> matchers_;
+};
+
+// Implements ElementsAreArray().
+template <typename T>
+class ElementsAreArrayMatcher {
+ public:
+  template <typename Iter>
+  ElementsAreArrayMatcher(Iter first, Iter last) : matchers_(first, last) {}
+
+  template <typename Container>
+  operator Matcher<Container>() const {
+    GTEST_COMPILE_ASSERT_(
+        !IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(Container)>::value,
+        use_UnorderedElementsAreArray_with_hash_tables);
+
+    return Matcher<Container>(new ElementsAreMatcherImpl<const Container&>(
+        matchers_.begin(), matchers_.end()));
+  }
+
+ private:
+  const ::std::vector<T> matchers_;
+};
+
+// Given a 2-tuple matcher tm of type Tuple2Matcher and a value second
+// of type Second, BoundSecondMatcher<Tuple2Matcher, Second>(tm,
+// second) is a polymorphic matcher that matches a value x if and only if
+// tm matches tuple (x, second).  Useful for implementing
+// UnorderedPointwise() in terms of UnorderedElementsAreArray().
+//
+// BoundSecondMatcher is copyable and assignable, as we need to put
+// instances of this class in a vector when implementing
+// UnorderedPointwise().
+template <typename Tuple2Matcher, typename Second>
+class BoundSecondMatcher {
+ public:
+  BoundSecondMatcher(const Tuple2Matcher& tm, const Second& second)
+      : tuple2_matcher_(tm), second_value_(second) {}
+
+  BoundSecondMatcher(const BoundSecondMatcher& other) = default;
+
+  template <typename T>
+  operator Matcher<T>() const {
+    return MakeMatcher(new Impl<T>(tuple2_matcher_, second_value_));
+  }
+
+  // We have to define this for UnorderedPointwise() to compile in
+  // C++98 mode, as it puts BoundSecondMatcher instances in a vector,
+  // which requires the elements to be assignable in C++98.  The
+  // compiler cannot generate the operator= for us, as Tuple2Matcher
+  // and Second may not be assignable.
+  //
+  // However, this should never be called, so the implementation just
+  // need to assert.
+  void operator=(const BoundSecondMatcher& /*rhs*/) {
+    GTEST_LOG_(FATAL) << "BoundSecondMatcher should never be assigned.";
+  }
+
+ private:
+  template <typename T>
+  class Impl : public MatcherInterface<T> {
+   public:
+    typedef ::std::tuple<T, Second> ArgTuple;
+
+    Impl(const Tuple2Matcher& tm, const Second& second)
+        : mono_tuple2_matcher_(SafeMatcherCast<const ArgTuple&>(tm)),
+          second_value_(second) {}
+
+    void DescribeTo(::std::ostream* os) const override {
+      *os << "and ";
+      UniversalPrint(second_value_, os);
+      *os << " ";
+      mono_tuple2_matcher_.DescribeTo(os);
+    }
+
+    bool MatchAndExplain(T x, MatchResultListener* listener) const override {
+      return mono_tuple2_matcher_.MatchAndExplain(ArgTuple(x, second_value_),
+                                                  listener);
+    }
+
+   private:
+    const Matcher<const ArgTuple&> mono_tuple2_matcher_;
+    const Second second_value_;
+  };
+
+  const Tuple2Matcher tuple2_matcher_;
+  const Second second_value_;
+};
+
+// Given a 2-tuple matcher tm and a value second,
+// MatcherBindSecond(tm, second) returns a matcher that matches a
+// value x if and only if tm matches tuple (x, second).  Useful for
+// implementing UnorderedPointwise() in terms of UnorderedElementsAreArray().
+template <typename Tuple2Matcher, typename Second>
+BoundSecondMatcher<Tuple2Matcher, Second> MatcherBindSecond(
+    const Tuple2Matcher& tm, const Second& second) {
+  return BoundSecondMatcher<Tuple2Matcher, Second>(tm, second);
+}
+
+// Returns the description for a matcher defined using the MATCHER*()
+// macro where the user-supplied description string is "", if
+// 'negation' is false; otherwise returns the description of the
+// negation of the matcher.  'param_values' contains a list of strings
+// that are the print-out of the matcher's parameters.
+GTEST_API_ std::string FormatMatcherDescription(bool negation,
+                                                const char* matcher_name,
+                                                const Strings& param_values);
+
+// Implements a matcher that checks the value of a optional<> type variable.
+template <typename ValueMatcher>
+class OptionalMatcher {
+ public:
+  explicit OptionalMatcher(const ValueMatcher& value_matcher)
+      : value_matcher_(value_matcher) {}
+
+  template <typename Optional>
+  operator Matcher<Optional>() const {
+    return Matcher<Optional>(new Impl<const Optional&>(value_matcher_));
+  }
+
+  template <typename Optional>
+  class Impl : public MatcherInterface<Optional> {
+   public:
+    typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Optional) OptionalView;
+    typedef typename OptionalView::value_type ValueType;
+    explicit Impl(const ValueMatcher& value_matcher)
+        : value_matcher_(MatcherCast<ValueType>(value_matcher)) {}
+
+    void DescribeTo(::std::ostream* os) const override {
+      *os << "value ";
+      value_matcher_.DescribeTo(os);
+    }
+
+    void DescribeNegationTo(::std::ostream* os) const override {
+      *os << "value ";
+      value_matcher_.DescribeNegationTo(os);
+    }
+
+    bool MatchAndExplain(Optional optional,
+                         MatchResultListener* listener) const override {
+      if (!optional) {
+        *listener << "which is not engaged";
+        return false;
+      }
+      const ValueType& value = *optional;
+      StringMatchResultListener value_listener;
+      const bool match = value_matcher_.MatchAndExplain(value, &value_listener);
+      *listener << "whose value " << PrintToString(value)
+                << (match ? " matches" : " doesn't match");
+      PrintIfNotEmpty(value_listener.str(), listener->stream());
+      return match;
+    }
+
+   private:
+    const Matcher<ValueType> value_matcher_;
+  };
+
+ private:
+  const ValueMatcher value_matcher_;
+};
+
+namespace variant_matcher {
+// Overloads to allow VariantMatcher to do proper ADL lookup.
+template <typename T>
+void holds_alternative() {}
+template <typename T>
+void get() {}
+
+// Implements a matcher that checks the value of a variant<> type variable.
+template <typename T>
+class VariantMatcher {
+ public:
+  explicit VariantMatcher(::testing::Matcher<const T&> matcher)
+      : matcher_(std::move(matcher)) {}
+
+  template <typename Variant>
+  bool MatchAndExplain(const Variant& value,
+                       ::testing::MatchResultListener* listener) const {
+    using std::get;
+    if (!listener->IsInterested()) {
+      return holds_alternative<T>(value) && matcher_.Matches(get<T>(value));
+    }
+
+    if (!holds_alternative<T>(value)) {
+      *listener << "whose value is not of type '" << GetTypeName() << "'";
+      return false;
+    }
+
+    const T& elem = get<T>(value);
+    StringMatchResultListener elem_listener;
+    const bool match = matcher_.MatchAndExplain(elem, &elem_listener);
+    *listener << "whose value " << PrintToString(elem)
+              << (match ? " matches" : " doesn't match");
+    PrintIfNotEmpty(elem_listener.str(), listener->stream());
+    return match;
+  }
+
+  void DescribeTo(std::ostream* os) const {
+    *os << "is a variant<> with value of type '" << GetTypeName()
+        << "' and the value ";
+    matcher_.DescribeTo(os);
+  }
+
+  void DescribeNegationTo(std::ostream* os) const {
+    *os << "is a variant<> with value of type other than '" << GetTypeName()
+        << "' or the value ";
+    matcher_.DescribeNegationTo(os);
+  }
+
+ private:
+  static std::string GetTypeName() {
+#if GTEST_HAS_RTTI
+    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(
+        return internal::GetTypeName<T>());
+#endif
+    return "the element type";
+  }
+
+  const ::testing::Matcher<const T&> matcher_;
+};
+
+}  // namespace variant_matcher
+
+namespace any_cast_matcher {
+
+// Overloads to allow AnyCastMatcher to do proper ADL lookup.
+template <typename T>
+void any_cast() {}
+
+// Implements a matcher that any_casts the value.
+template <typename T>
+class AnyCastMatcher {
+ public:
+  explicit AnyCastMatcher(const ::testing::Matcher<const T&>& matcher)
+      : matcher_(matcher) {}
+
+  template <typename AnyType>
+  bool MatchAndExplain(const AnyType& value,
+                       ::testing::MatchResultListener* listener) const {
+    if (!listener->IsInterested()) {
+      const T* ptr = any_cast<T>(&value);
+      return ptr != nullptr && matcher_.Matches(*ptr);
+    }
+
+    const T* elem = any_cast<T>(&value);
+    if (elem == nullptr) {
+      *listener << "whose value is not of type '" << GetTypeName() << "'";
+      return false;
+    }
+
+    StringMatchResultListener elem_listener;
+    const bool match = matcher_.MatchAndExplain(*elem, &elem_listener);
+    *listener << "whose value " << PrintToString(*elem)
+              << (match ? " matches" : " doesn't match");
+    PrintIfNotEmpty(elem_listener.str(), listener->stream());
+    return match;
+  }
+
+  void DescribeTo(std::ostream* os) const {
+    *os << "is an 'any' type with value of type '" << GetTypeName()
+        << "' and the value ";
+    matcher_.DescribeTo(os);
+  }
+
+  void DescribeNegationTo(std::ostream* os) const {
+    *os << "is an 'any' type with value of type other than '" << GetTypeName()
+        << "' or the value ";
+    matcher_.DescribeNegationTo(os);
+  }
+
+ private:
+  static std::string GetTypeName() {
+#if GTEST_HAS_RTTI
+    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(
+        return internal::GetTypeName<T>());
+#endif
+    return "the element type";
+  }
+
+  const ::testing::Matcher<const T&> matcher_;
+};
+
+}  // namespace any_cast_matcher
+
+// Implements the Args() matcher.
+template <class ArgsTuple, size_t... k>
+class ArgsMatcherImpl : public MatcherInterface<ArgsTuple> {
+ public:
+  using RawArgsTuple = typename std::decay<ArgsTuple>::type;
+  using SelectedArgs =
+      std::tuple<typename std::tuple_element<k, RawArgsTuple>::type...>;
+  using MonomorphicInnerMatcher = Matcher<const SelectedArgs&>;
+
+  template <typename InnerMatcher>
+  explicit ArgsMatcherImpl(const InnerMatcher& inner_matcher)
+      : inner_matcher_(SafeMatcherCast<const SelectedArgs&>(inner_matcher)) {}
+
+  bool MatchAndExplain(ArgsTuple args,
+                       MatchResultListener* listener) const override {
+    // Workaround spurious C4100 on MSVC<=15.7 when k is empty.
+    (void)args;
+    const SelectedArgs& selected_args =
+        std::forward_as_tuple(std::get<k>(args)...);
+    if (!listener->IsInterested()) return inner_matcher_.Matches(selected_args);
+
+    PrintIndices(listener->stream());
+    *listener << "are " << PrintToString(selected_args);
+
+    StringMatchResultListener inner_listener;
+    const bool match =
+        inner_matcher_.MatchAndExplain(selected_args, &inner_listener);
+    PrintIfNotEmpty(inner_listener.str(), listener->stream());
+    return match;
+  }
+
+  void DescribeTo(::std::ostream* os) const override {
+    *os << "are a tuple ";
+    PrintIndices(os);
+    inner_matcher_.DescribeTo(os);
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const override {
+    *os << "are a tuple ";
+    PrintIndices(os);
+    inner_matcher_.DescribeNegationTo(os);
+  }
+
+ private:
+  // Prints the indices of the selected fields.
+  static void PrintIndices(::std::ostream* os) {
+    *os << "whose fields (";
+    const char* sep = "";
+    // Workaround spurious C4189 on MSVC<=15.7 when k is empty.
+    (void)sep;
+    const char* dummy[] = {"", (*os << sep << "#" << k, sep = ", ")...};
+    (void)dummy;
+    *os << ") ";
+  }
+
+  MonomorphicInnerMatcher inner_matcher_;
+};
+
+template <class InnerMatcher, size_t... k>
+class ArgsMatcher {
+ public:
+  explicit ArgsMatcher(InnerMatcher inner_matcher)
+      : inner_matcher_(std::move(inner_matcher)) {}
+
+  template <typename ArgsTuple>
+  operator Matcher<ArgsTuple>() const {  // NOLINT
+    return MakeMatcher(new ArgsMatcherImpl<ArgsTuple, k...>(inner_matcher_));
+  }
+
+ private:
+  InnerMatcher inner_matcher_;
+};
+
+}  // namespace internal
+
+// ElementsAreArray(iterator_first, iterator_last)
+// ElementsAreArray(pointer, count)
+// ElementsAreArray(array)
+// ElementsAreArray(container)
+// ElementsAreArray({ e1, e2, ..., en })
+//
+// The ElementsAreArray() functions are like ElementsAre(...), except
+// that they are given a homogeneous sequence rather than taking each
+// element as a function argument. The sequence can be specified as an
+// array, a pointer and count, a vector, an initializer list, or an
+// STL iterator range. In each of these cases, the underlying sequence
+// can be either a sequence of values or a sequence of matchers.
+//
+// All forms of ElementsAreArray() make a copy of the input matcher sequence.
+
+template <typename Iter>
+inline internal::ElementsAreArrayMatcher<
+    typename ::std::iterator_traits<Iter>::value_type>
+ElementsAreArray(Iter first, Iter last) {
+  typedef typename ::std::iterator_traits<Iter>::value_type T;
+  return internal::ElementsAreArrayMatcher<T>(first, last);
+}
+
+template <typename T>
+inline internal::ElementsAreArrayMatcher<T> ElementsAreArray(
+    const T* pointer, size_t count) {
+  return ElementsAreArray(pointer, pointer + count);
+}
+
+template <typename T, size_t N>
+inline internal::ElementsAreArrayMatcher<T> ElementsAreArray(
+    const T (&array)[N]) {
+  return ElementsAreArray(array, N);
+}
+
+template <typename Container>
+inline internal::ElementsAreArrayMatcher<typename Container::value_type>
+ElementsAreArray(const Container& container) {
+  return ElementsAreArray(container.begin(), container.end());
+}
+
+template <typename T>
+inline internal::ElementsAreArrayMatcher<T>
+ElementsAreArray(::std::initializer_list<T> xs) {
+  return ElementsAreArray(xs.begin(), xs.end());
+}
+
+// UnorderedElementsAreArray(iterator_first, iterator_last)
+// UnorderedElementsAreArray(pointer, count)
+// UnorderedElementsAreArray(array)
+// UnorderedElementsAreArray(container)
+// UnorderedElementsAreArray({ e1, e2, ..., en })
+//
+// UnorderedElementsAreArray() verifies that a bijective mapping onto a
+// collection of matchers exists.
+//
+// The matchers can be specified as an array, a pointer and count, a container,
+// an initializer list, or an STL iterator range. In each of these cases, the
+// underlying matchers can be either values or matchers.
+
+template <typename Iter>
+inline internal::UnorderedElementsAreArrayMatcher<
+    typename ::std::iterator_traits<Iter>::value_type>
+UnorderedElementsAreArray(Iter first, Iter last) {
+  typedef typename ::std::iterator_traits<Iter>::value_type T;
+  return internal::UnorderedElementsAreArrayMatcher<T>(
+      internal::UnorderedMatcherRequire::ExactMatch, first, last);
+}
+
+template <typename T>
+inline internal::UnorderedElementsAreArrayMatcher<T>
+UnorderedElementsAreArray(const T* pointer, size_t count) {
+  return UnorderedElementsAreArray(pointer, pointer + count);
+}
+
+template <typename T, size_t N>
+inline internal::UnorderedElementsAreArrayMatcher<T>
+UnorderedElementsAreArray(const T (&array)[N]) {
+  return UnorderedElementsAreArray(array, N);
+}
+
+template <typename Container>
+inline internal::UnorderedElementsAreArrayMatcher<
+    typename Container::value_type>
+UnorderedElementsAreArray(const Container& container) {
+  return UnorderedElementsAreArray(container.begin(), container.end());
+}
+
+template <typename T>
+inline internal::UnorderedElementsAreArrayMatcher<T>
+UnorderedElementsAreArray(::std::initializer_list<T> xs) {
+  return UnorderedElementsAreArray(xs.begin(), xs.end());
+}
+
+// _ is a matcher that matches anything of any type.
+//
+// This definition is fine as:
+//
+//   1. The C++ standard permits using the name _ in a namespace that
+//      is not the global namespace or ::std.
+//   2. The AnythingMatcher class has no data member or constructor,
+//      so it's OK to create global variables of this type.
+//   3. c-style has approved of using _ in this case.
+const internal::AnythingMatcher _ = {};
+// Creates a matcher that matches any value of the given type T.
+template <typename T>
+inline Matcher<T> A() {
+  return _;
+}
+
+// Creates a matcher that matches any value of the given type T.
+template <typename T>
+inline Matcher<T> An() {
+  return _;
+}
+
+template <typename T, typename M>
+Matcher<T> internal::MatcherCastImpl<T, M>::CastImpl(
+    const M& value, std::false_type /* convertible_to_matcher */,
+    std::false_type /* convertible_to_T */) {
+  return Eq(value);
+}
+
+// Creates a polymorphic matcher that matches any NULL pointer.
+inline PolymorphicMatcher<internal::IsNullMatcher > IsNull() {
+  return MakePolymorphicMatcher(internal::IsNullMatcher());
+}
+
+// Creates a polymorphic matcher that matches any non-NULL pointer.
+// This is convenient as Not(NULL) doesn't compile (the compiler
+// thinks that that expression is comparing a pointer with an integer).
+inline PolymorphicMatcher<internal::NotNullMatcher > NotNull() {
+  return MakePolymorphicMatcher(internal::NotNullMatcher());
+}
+
+// Creates a polymorphic matcher that matches any argument that
+// references variable x.
+template <typename T>
+inline internal::RefMatcher<T&> Ref(T& x) {  // NOLINT
+  return internal::RefMatcher<T&>(x);
+}
+
+// Creates a polymorphic matcher that matches any NaN floating point.
+inline PolymorphicMatcher<internal::IsNanMatcher> IsNan() {
+  return MakePolymorphicMatcher(internal::IsNanMatcher());
+}
+
+// Creates a matcher that matches any double argument approximately
+// equal to rhs, where two NANs are considered unequal.
+inline internal::FloatingEqMatcher<double> DoubleEq(double rhs) {
+  return internal::FloatingEqMatcher<double>(rhs, false);
+}
+
+// Creates a matcher that matches any double argument approximately
+// equal to rhs, including NaN values when rhs is NaN.
+inline internal::FloatingEqMatcher<double> NanSensitiveDoubleEq(double rhs) {
+  return internal::FloatingEqMatcher<double>(rhs, true);
+}
+
+// Creates a matcher that matches any double argument approximately equal to
+// rhs, up to the specified max absolute error bound, where two NANs are
+// considered unequal.  The max absolute error bound must be non-negative.
+inline internal::FloatingEqMatcher<double> DoubleNear(
+    double rhs, double max_abs_error) {
+  return internal::FloatingEqMatcher<double>(rhs, false, max_abs_error);
+}
+
+// Creates a matcher that matches any double argument approximately equal to
+// rhs, up to the specified max absolute error bound, including NaN values when
+// rhs is NaN.  The max absolute error bound must be non-negative.
+inline internal::FloatingEqMatcher<double> NanSensitiveDoubleNear(
+    double rhs, double max_abs_error) {
+  return internal::FloatingEqMatcher<double>(rhs, true, max_abs_error);
+}
+
+// Creates a matcher that matches any float argument approximately
+// equal to rhs, where two NANs are considered unequal.
+inline internal::FloatingEqMatcher<float> FloatEq(float rhs) {
+  return internal::FloatingEqMatcher<float>(rhs, false);
+}
+
+// Creates a matcher that matches any float argument approximately
+// equal to rhs, including NaN values when rhs is NaN.
+inline internal::FloatingEqMatcher<float> NanSensitiveFloatEq(float rhs) {
+  return internal::FloatingEqMatcher<float>(rhs, true);
+}
+
+// Creates a matcher that matches any float argument approximately equal to
+// rhs, up to the specified max absolute error bound, where two NANs are
+// considered unequal.  The max absolute error bound must be non-negative.
+inline internal::FloatingEqMatcher<float> FloatNear(
+    float rhs, float max_abs_error) {
+  return internal::FloatingEqMatcher<float>(rhs, false, max_abs_error);
+}
+
+// Creates a matcher that matches any float argument approximately equal to
+// rhs, up to the specified max absolute error bound, including NaN values when
+// rhs is NaN.  The max absolute error bound must be non-negative.
+inline internal::FloatingEqMatcher<float> NanSensitiveFloatNear(
+    float rhs, float max_abs_error) {
+  return internal::FloatingEqMatcher<float>(rhs, true, max_abs_error);
+}
+
+// Creates a matcher that matches a pointer (raw or smart) that points
+// to a value that matches inner_matcher.
+template <typename InnerMatcher>
+inline internal::PointeeMatcher<InnerMatcher> Pointee(
+    const InnerMatcher& inner_matcher) {
+  return internal::PointeeMatcher<InnerMatcher>(inner_matcher);
+}
+
+#if GTEST_HAS_RTTI
+// Creates a matcher that matches a pointer or reference that matches
+// inner_matcher when dynamic_cast<To> is applied.
+// The result of dynamic_cast<To> is forwarded to the inner matcher.
+// If To is a pointer and the cast fails, the inner matcher will receive NULL.
+// If To is a reference and the cast fails, this matcher returns false
+// immediately.
+template <typename To>
+inline PolymorphicMatcher<internal::WhenDynamicCastToMatcher<To> >
+WhenDynamicCastTo(const Matcher<To>& inner_matcher) {
+  return MakePolymorphicMatcher(
+      internal::WhenDynamicCastToMatcher<To>(inner_matcher));
+}
+#endif  // GTEST_HAS_RTTI
+
+// Creates a matcher that matches an object whose given field matches
+// 'matcher'.  For example,
+//   Field(&Foo::number, Ge(5))
+// matches a Foo object x if and only if x.number >= 5.
+template <typename Class, typename FieldType, typename FieldMatcher>
+inline PolymorphicMatcher<
+  internal::FieldMatcher<Class, FieldType> > Field(
+    FieldType Class::*field, const FieldMatcher& matcher) {
+  return MakePolymorphicMatcher(
+      internal::FieldMatcher<Class, FieldType>(
+          field, MatcherCast<const FieldType&>(matcher)));
+  // The call to MatcherCast() is required for supporting inner
+  // matchers of compatible types.  For example, it allows
+  //   Field(&Foo::bar, m)
+  // to compile where bar is an int32 and m is a matcher for int64.
+}
+
+// Same as Field() but also takes the name of the field to provide better error
+// messages.
+template <typename Class, typename FieldType, typename FieldMatcher>
+inline PolymorphicMatcher<internal::FieldMatcher<Class, FieldType> > Field(
+    const std::string& field_name, FieldType Class::*field,
+    const FieldMatcher& matcher) {
+  return MakePolymorphicMatcher(internal::FieldMatcher<Class, FieldType>(
+      field_name, field, MatcherCast<const FieldType&>(matcher)));
+}
+
+// Creates a matcher that matches an object whose given property
+// matches 'matcher'.  For example,
+//   Property(&Foo::str, StartsWith("hi"))
+// matches a Foo object x if and only if x.str() starts with "hi".
+template <typename Class, typename PropertyType, typename PropertyMatcher>
+inline PolymorphicMatcher<internal::PropertyMatcher<
+    Class, PropertyType, PropertyType (Class::*)() const> >
+Property(PropertyType (Class::*property)() const,
+         const PropertyMatcher& matcher) {
+  return MakePolymorphicMatcher(
+      internal::PropertyMatcher<Class, PropertyType,
+                                PropertyType (Class::*)() const>(
+          property, MatcherCast<const PropertyType&>(matcher)));
+  // The call to MatcherCast() is required for supporting inner
+  // matchers of compatible types.  For example, it allows
+  //   Property(&Foo::bar, m)
+  // to compile where bar() returns an int32 and m is a matcher for int64.
+}
+
+// Same as Property() above, but also takes the name of the property to provide
+// better error messages.
+template <typename Class, typename PropertyType, typename PropertyMatcher>
+inline PolymorphicMatcher<internal::PropertyMatcher<
+    Class, PropertyType, PropertyType (Class::*)() const> >
+Property(const std::string& property_name,
+         PropertyType (Class::*property)() const,
+         const PropertyMatcher& matcher) {
+  return MakePolymorphicMatcher(
+      internal::PropertyMatcher<Class, PropertyType,
+                                PropertyType (Class::*)() const>(
+          property_name, property, MatcherCast<const PropertyType&>(matcher)));
+}
+
+// The same as above but for reference-qualified member functions.
+template <typename Class, typename PropertyType, typename PropertyMatcher>
+inline PolymorphicMatcher<internal::PropertyMatcher<
+    Class, PropertyType, PropertyType (Class::*)() const &> >
+Property(PropertyType (Class::*property)() const &,
+         const PropertyMatcher& matcher) {
+  return MakePolymorphicMatcher(
+      internal::PropertyMatcher<Class, PropertyType,
+                                PropertyType (Class::*)() const&>(
+          property, MatcherCast<const PropertyType&>(matcher)));
+}
+
+// Three-argument form for reference-qualified member functions.
+template <typename Class, typename PropertyType, typename PropertyMatcher>
+inline PolymorphicMatcher<internal::PropertyMatcher<
+    Class, PropertyType, PropertyType (Class::*)() const &> >
+Property(const std::string& property_name,
+         PropertyType (Class::*property)() const &,
+         const PropertyMatcher& matcher) {
+  return MakePolymorphicMatcher(
+      internal::PropertyMatcher<Class, PropertyType,
+                                PropertyType (Class::*)() const&>(
+          property_name, property, MatcherCast<const PropertyType&>(matcher)));
+}
+
+// Creates a matcher that matches an object if and only if the result of
+// applying a callable to x matches 'matcher'. For example,
+//   ResultOf(f, StartsWith("hi"))
+// matches a Foo object x if and only if f(x) starts with "hi".
+// `callable` parameter can be a function, function pointer, or a functor. It is
+// required to keep no state affecting the results of the calls on it and make
+// no assumptions about how many calls will be made. Any state it keeps must be
+// protected from the concurrent access.
+template <typename Callable, typename InnerMatcher>
+internal::ResultOfMatcher<Callable, InnerMatcher> ResultOf(
+    Callable callable, InnerMatcher matcher) {
+  return internal::ResultOfMatcher<Callable, InnerMatcher>(
+      std::move(callable), std::move(matcher));
+}
+
+// String matchers.
+
+// Matches a string equal to str.
+template <typename T = std::string>
+PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrEq(
+    const internal::StringLike<T>& str) {
+  return MakePolymorphicMatcher(
+      internal::StrEqualityMatcher<std::string>(std::string(str), true, true));
+}
+
+// Matches a string not equal to str.
+template <typename T = std::string>
+PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrNe(
+    const internal::StringLike<T>& str) {
+  return MakePolymorphicMatcher(
+      internal::StrEqualityMatcher<std::string>(std::string(str), false, true));
+}
+
+// Matches a string equal to str, ignoring case.
+template <typename T = std::string>
+PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrCaseEq(
+    const internal::StringLike<T>& str) {
+  return MakePolymorphicMatcher(
+      internal::StrEqualityMatcher<std::string>(std::string(str), true, false));
+}
+
+// Matches a string not equal to str, ignoring case.
+template <typename T = std::string>
+PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrCaseNe(
+    const internal::StringLike<T>& str) {
+  return MakePolymorphicMatcher(internal::StrEqualityMatcher<std::string>(
+      std::string(str), false, false));
+}
+
+// Creates a matcher that matches any string, std::string, or C string
+// that contains the given substring.
+template <typename T = std::string>
+PolymorphicMatcher<internal::HasSubstrMatcher<std::string> > HasSubstr(
+    const internal::StringLike<T>& substring) {
+  return MakePolymorphicMatcher(
+      internal::HasSubstrMatcher<std::string>(std::string(substring)));
+}
+
+// Matches a string that starts with 'prefix' (case-sensitive).
+template <typename T = std::string>
+PolymorphicMatcher<internal::StartsWithMatcher<std::string> > StartsWith(
+    const internal::StringLike<T>& prefix) {
+  return MakePolymorphicMatcher(
+      internal::StartsWithMatcher<std::string>(std::string(prefix)));
+}
+
+// Matches a string that ends with 'suffix' (case-sensitive).
+template <typename T = std::string>
+PolymorphicMatcher<internal::EndsWithMatcher<std::string> > EndsWith(
+    const internal::StringLike<T>& suffix) {
+  return MakePolymorphicMatcher(
+      internal::EndsWithMatcher<std::string>(std::string(suffix)));
+}
+
+#if GTEST_HAS_STD_WSTRING
+// Wide string matchers.
+
+// Matches a string equal to str.
+inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> > StrEq(
+    const std::wstring& str) {
+  return MakePolymorphicMatcher(
+      internal::StrEqualityMatcher<std::wstring>(str, true, true));
+}
+
+// Matches a string not equal to str.
+inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> > StrNe(
+    const std::wstring& str) {
+  return MakePolymorphicMatcher(
+      internal::StrEqualityMatcher<std::wstring>(str, false, true));
+}
+
+// Matches a string equal to str, ignoring case.
+inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> >
+StrCaseEq(const std::wstring& str) {
+  return MakePolymorphicMatcher(
+      internal::StrEqualityMatcher<std::wstring>(str, true, false));
+}
+
+// Matches a string not equal to str, ignoring case.
+inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> >
+StrCaseNe(const std::wstring& str) {
+  return MakePolymorphicMatcher(
+      internal::StrEqualityMatcher<std::wstring>(str, false, false));
+}
+
+// Creates a matcher that matches any ::wstring, std::wstring, or C wide string
+// that contains the given substring.
+inline PolymorphicMatcher<internal::HasSubstrMatcher<std::wstring> > HasSubstr(
+    const std::wstring& substring) {
+  return MakePolymorphicMatcher(
+      internal::HasSubstrMatcher<std::wstring>(substring));
+}
+
+// Matches a string that starts with 'prefix' (case-sensitive).
+inline PolymorphicMatcher<internal::StartsWithMatcher<std::wstring> >
+StartsWith(const std::wstring& prefix) {
+  return MakePolymorphicMatcher(
+      internal::StartsWithMatcher<std::wstring>(prefix));
+}
+
+// Matches a string that ends with 'suffix' (case-sensitive).
+inline PolymorphicMatcher<internal::EndsWithMatcher<std::wstring> > EndsWith(
+    const std::wstring& suffix) {
+  return MakePolymorphicMatcher(
+      internal::EndsWithMatcher<std::wstring>(suffix));
+}
+
+#endif  // GTEST_HAS_STD_WSTRING
+
+// Creates a polymorphic matcher that matches a 2-tuple where the
+// first field == the second field.
+inline internal::Eq2Matcher Eq() { return internal::Eq2Matcher(); }
+
+// Creates a polymorphic matcher that matches a 2-tuple where the
+// first field >= the second field.
+inline internal::Ge2Matcher Ge() { return internal::Ge2Matcher(); }
+
+// Creates a polymorphic matcher that matches a 2-tuple where the
+// first field > the second field.
+inline internal::Gt2Matcher Gt() { return internal::Gt2Matcher(); }
+
+// Creates a polymorphic matcher that matches a 2-tuple where the
+// first field <= the second field.
+inline internal::Le2Matcher Le() { return internal::Le2Matcher(); }
+
+// Creates a polymorphic matcher that matches a 2-tuple where the
+// first field < the second field.
+inline internal::Lt2Matcher Lt() { return internal::Lt2Matcher(); }
+
+// Creates a polymorphic matcher that matches a 2-tuple where the
+// first field != the second field.
+inline internal::Ne2Matcher Ne() { return internal::Ne2Matcher(); }
+
+// Creates a polymorphic matcher that matches a 2-tuple where
+// FloatEq(first field) matches the second field.
+inline internal::FloatingEq2Matcher<float> FloatEq() {
+  return internal::FloatingEq2Matcher<float>();
+}
+
+// Creates a polymorphic matcher that matches a 2-tuple where
+// DoubleEq(first field) matches the second field.
+inline internal::FloatingEq2Matcher<double> DoubleEq() {
+  return internal::FloatingEq2Matcher<double>();
+}
+
+// Creates a polymorphic matcher that matches a 2-tuple where
+// FloatEq(first field) matches the second field with NaN equality.
+inline internal::FloatingEq2Matcher<float> NanSensitiveFloatEq() {
+  return internal::FloatingEq2Matcher<float>(true);
+}
+
+// Creates a polymorphic matcher that matches a 2-tuple where
+// DoubleEq(first field) matches the second field with NaN equality.
+inline internal::FloatingEq2Matcher<double> NanSensitiveDoubleEq() {
+  return internal::FloatingEq2Matcher<double>(true);
+}
+
+// Creates a polymorphic matcher that matches a 2-tuple where
+// FloatNear(first field, max_abs_error) matches the second field.
+inline internal::FloatingEq2Matcher<float> FloatNear(float max_abs_error) {
+  return internal::FloatingEq2Matcher<float>(max_abs_error);
+}
+
+// Creates a polymorphic matcher that matches a 2-tuple where
+// DoubleNear(first field, max_abs_error) matches the second field.
+inline internal::FloatingEq2Matcher<double> DoubleNear(double max_abs_error) {
+  return internal::FloatingEq2Matcher<double>(max_abs_error);
+}
+
+// Creates a polymorphic matcher that matches a 2-tuple where
+// FloatNear(first field, max_abs_error) matches the second field with NaN
+// equality.
+inline internal::FloatingEq2Matcher<float> NanSensitiveFloatNear(
+    float max_abs_error) {
+  return internal::FloatingEq2Matcher<float>(max_abs_error, true);
+}
+
+// Creates a polymorphic matcher that matches a 2-tuple where
+// DoubleNear(first field, max_abs_error) matches the second field with NaN
+// equality.
+inline internal::FloatingEq2Matcher<double> NanSensitiveDoubleNear(
+    double max_abs_error) {
+  return internal::FloatingEq2Matcher<double>(max_abs_error, true);
+}
+
+// Creates a matcher that matches any value of type T that m doesn't
+// match.
+template <typename InnerMatcher>
+inline internal::NotMatcher<InnerMatcher> Not(InnerMatcher m) {
+  return internal::NotMatcher<InnerMatcher>(m);
+}
+
+// Returns a matcher that matches anything that satisfies the given
+// predicate.  The predicate can be any unary function or functor
+// whose return type can be implicitly converted to bool.
+template <typename Predicate>
+inline PolymorphicMatcher<internal::TrulyMatcher<Predicate> >
+Truly(Predicate pred) {
+  return MakePolymorphicMatcher(internal::TrulyMatcher<Predicate>(pred));
+}
+
+// Returns a matcher that matches the container size. The container must
+// support both size() and size_type which all STL-like containers provide.
+// Note that the parameter 'size' can be a value of type size_type as well as
+// matcher. For instance:
+//   EXPECT_THAT(container, SizeIs(2));     // Checks container has 2 elements.
+//   EXPECT_THAT(container, SizeIs(Le(2));  // Checks container has at most 2.
+template <typename SizeMatcher>
+inline internal::SizeIsMatcher<SizeMatcher>
+SizeIs(const SizeMatcher& size_matcher) {
+  return internal::SizeIsMatcher<SizeMatcher>(size_matcher);
+}
+
+// Returns a matcher that matches the distance between the container's begin()
+// iterator and its end() iterator, i.e. the size of the container. This matcher
+// can be used instead of SizeIs with containers such as std::forward_list which
+// do not implement size(). The container must provide const_iterator (with
+// valid iterator_traits), begin() and end().
+template <typename DistanceMatcher>
+inline internal::BeginEndDistanceIsMatcher<DistanceMatcher>
+BeginEndDistanceIs(const DistanceMatcher& distance_matcher) {
+  return internal::BeginEndDistanceIsMatcher<DistanceMatcher>(distance_matcher);
+}
+
+// Returns a matcher that matches an equal container.
+// This matcher behaves like Eq(), but in the event of mismatch lists the
+// values that are included in one container but not the other. (Duplicate
+// values and order differences are not explained.)
+template <typename Container>
+inline PolymorphicMatcher<internal::ContainerEqMatcher<
+    typename std::remove_const<Container>::type>>
+ContainerEq(const Container& rhs) {
+  return MakePolymorphicMatcher(internal::ContainerEqMatcher<Container>(rhs));
+}
+
+// Returns a matcher that matches a container that, when sorted using
+// the given comparator, matches container_matcher.
+template <typename Comparator, typename ContainerMatcher>
+inline internal::WhenSortedByMatcher<Comparator, ContainerMatcher>
+WhenSortedBy(const Comparator& comparator,
+             const ContainerMatcher& container_matcher) {
+  return internal::WhenSortedByMatcher<Comparator, ContainerMatcher>(
+      comparator, container_matcher);
+}
+
+// Returns a matcher that matches a container that, when sorted using
+// the < operator, matches container_matcher.
+template <typename ContainerMatcher>
+inline internal::WhenSortedByMatcher<internal::LessComparator, ContainerMatcher>
+WhenSorted(const ContainerMatcher& container_matcher) {
+  return
+      internal::WhenSortedByMatcher<internal::LessComparator, ContainerMatcher>(
+          internal::LessComparator(), container_matcher);
+}
+
+// Matches an STL-style container or a native array that contains the
+// same number of elements as in rhs, where its i-th element and rhs's
+// i-th element (as a pair) satisfy the given pair matcher, for all i.
+// TupleMatcher must be able to be safely cast to Matcher<std::tuple<const
+// T1&, const T2&> >, where T1 and T2 are the types of elements in the
+// LHS container and the RHS container respectively.
+template <typename TupleMatcher, typename Container>
+inline internal::PointwiseMatcher<TupleMatcher,
+                                  typename std::remove_const<Container>::type>
+Pointwise(const TupleMatcher& tuple_matcher, const Container& rhs) {
+  return internal::PointwiseMatcher<TupleMatcher, Container>(tuple_matcher,
+                                                             rhs);
+}
+
+
+// Supports the Pointwise(m, {a, b, c}) syntax.
+template <typename TupleMatcher, typename T>
+inline internal::PointwiseMatcher<TupleMatcher, std::vector<T> > Pointwise(
+    const TupleMatcher& tuple_matcher, std::initializer_list<T> rhs) {
+  return Pointwise(tuple_matcher, std::vector<T>(rhs));
+}
+
+
+// UnorderedPointwise(pair_matcher, rhs) matches an STL-style
+// container or a native array that contains the same number of
+// elements as in rhs, where in some permutation of the container, its
+// i-th element and rhs's i-th element (as a pair) satisfy the given
+// pair matcher, for all i.  Tuple2Matcher must be able to be safely
+// cast to Matcher<std::tuple<const T1&, const T2&> >, where T1 and T2 are
+// the types of elements in the LHS container and the RHS container
+// respectively.
+//
+// This is like Pointwise(pair_matcher, rhs), except that the element
+// order doesn't matter.
+template <typename Tuple2Matcher, typename RhsContainer>
+inline internal::UnorderedElementsAreArrayMatcher<
+    typename internal::BoundSecondMatcher<
+        Tuple2Matcher,
+        typename internal::StlContainerView<
+            typename std::remove_const<RhsContainer>::type>::type::value_type>>
+UnorderedPointwise(const Tuple2Matcher& tuple2_matcher,
+                   const RhsContainer& rhs_container) {
+  // RhsView allows the same code to handle RhsContainer being a
+  // STL-style container and it being a native C-style array.
+  typedef typename internal::StlContainerView<RhsContainer> RhsView;
+  typedef typename RhsView::type RhsStlContainer;
+  typedef typename RhsStlContainer::value_type Second;
+  const RhsStlContainer& rhs_stl_container =
+      RhsView::ConstReference(rhs_container);
+
+  // Create a matcher for each element in rhs_container.
+  ::std::vector<internal::BoundSecondMatcher<Tuple2Matcher, Second> > matchers;
+  for (typename RhsStlContainer::const_iterator it = rhs_stl_container.begin();
+       it != rhs_stl_container.end(); ++it) {
+    matchers.push_back(
+        internal::MatcherBindSecond(tuple2_matcher, *it));
+  }
+
+  // Delegate the work to UnorderedElementsAreArray().
+  return UnorderedElementsAreArray(matchers);
+}
+
+
+// Supports the UnorderedPointwise(m, {a, b, c}) syntax.
+template <typename Tuple2Matcher, typename T>
+inline internal::UnorderedElementsAreArrayMatcher<
+    typename internal::BoundSecondMatcher<Tuple2Matcher, T> >
+UnorderedPointwise(const Tuple2Matcher& tuple2_matcher,
+                   std::initializer_list<T> rhs) {
+  return UnorderedPointwise(tuple2_matcher, std::vector<T>(rhs));
+}
+
+
+// Matches an STL-style container or a native array that contains at
+// least one element matching the given value or matcher.
+//
+// Examples:
+//   ::std::set<int> page_ids;
+//   page_ids.insert(3);
+//   page_ids.insert(1);
+//   EXPECT_THAT(page_ids, Contains(1));
+//   EXPECT_THAT(page_ids, Contains(Gt(2)));
+//   EXPECT_THAT(page_ids, Not(Contains(4)));
+//
+//   ::std::map<int, size_t> page_lengths;
+//   page_lengths[1] = 100;
+//   EXPECT_THAT(page_lengths,
+//               Contains(::std::pair<const int, size_t>(1, 100)));
+//
+//   const char* user_ids[] = { "joe", "mike", "tom" };
+//   EXPECT_THAT(user_ids, Contains(Eq(::std::string("tom"))));
+template <typename M>
+inline internal::ContainsMatcher<M> Contains(M matcher) {
+  return internal::ContainsMatcher<M>(matcher);
+}
+
+// IsSupersetOf(iterator_first, iterator_last)
+// IsSupersetOf(pointer, count)
+// IsSupersetOf(array)
+// IsSupersetOf(container)
+// IsSupersetOf({e1, e2, ..., en})
+//
+// IsSupersetOf() verifies that a surjective partial mapping onto a collection
+// of matchers exists. In other words, a container matches
+// IsSupersetOf({e1, ..., en}) if and only if there is a permutation
+// {y1, ..., yn} of some of the container's elements where y1 matches e1,
+// ..., and yn matches en. Obviously, the size of the container must be >= n
+// in order to have a match. Examples:
+//
+// - {1, 2, 3} matches IsSupersetOf({Ge(3), Ne(0)}), as 3 matches Ge(3) and
+//   1 matches Ne(0).
+// - {1, 2} doesn't match IsSupersetOf({Eq(1), Lt(2)}), even though 1 matches
+//   both Eq(1) and Lt(2). The reason is that different matchers must be used
+//   for elements in different slots of the container.
+// - {1, 1, 2} matches IsSupersetOf({Eq(1), Lt(2)}), as (the first) 1 matches
+//   Eq(1) and (the second) 1 matches Lt(2).
+// - {1, 2, 3} matches IsSupersetOf(Gt(1), Gt(1)), as 2 matches (the first)
+//   Gt(1) and 3 matches (the second) Gt(1).
+//
+// The matchers can be specified as an array, a pointer and count, a container,
+// an initializer list, or an STL iterator range. In each of these cases, the
+// underlying matchers can be either values or matchers.
+
+template <typename Iter>
+inline internal::UnorderedElementsAreArrayMatcher<
+    typename ::std::iterator_traits<Iter>::value_type>
+IsSupersetOf(Iter first, Iter last) {
+  typedef typename ::std::iterator_traits<Iter>::value_type T;
+  return internal::UnorderedElementsAreArrayMatcher<T>(
+      internal::UnorderedMatcherRequire::Superset, first, last);
+}
+
+template <typename T>
+inline internal::UnorderedElementsAreArrayMatcher<T> IsSupersetOf(
+    const T* pointer, size_t count) {
+  return IsSupersetOf(pointer, pointer + count);
+}
+
+template <typename T, size_t N>
+inline internal::UnorderedElementsAreArrayMatcher<T> IsSupersetOf(
+    const T (&array)[N]) {
+  return IsSupersetOf(array, N);
+}
+
+template <typename Container>
+inline internal::UnorderedElementsAreArrayMatcher<
+    typename Container::value_type>
+IsSupersetOf(const Container& container) {
+  return IsSupersetOf(container.begin(), container.end());
+}
+
+template <typename T>
+inline internal::UnorderedElementsAreArrayMatcher<T> IsSupersetOf(
+    ::std::initializer_list<T> xs) {
+  return IsSupersetOf(xs.begin(), xs.end());
+}
+
+// IsSubsetOf(iterator_first, iterator_last)
+// IsSubsetOf(pointer, count)
+// IsSubsetOf(array)
+// IsSubsetOf(container)
+// IsSubsetOf({e1, e2, ..., en})
+//
+// IsSubsetOf() verifies that an injective mapping onto a collection of matchers
+// exists.  In other words, a container matches IsSubsetOf({e1, ..., en}) if and
+// only if there is a subset of matchers {m1, ..., mk} which would match the
+// container using UnorderedElementsAre.  Obviously, the size of the container
+// must be <= n in order to have a match. Examples:
+//
+// - {1} matches IsSubsetOf({Gt(0), Lt(0)}), as 1 matches Gt(0).
+// - {1, -1} matches IsSubsetOf({Lt(0), Gt(0)}), as 1 matches Gt(0) and -1
+//   matches Lt(0).
+// - {1, 2} doesn't matches IsSubsetOf({Gt(0), Lt(0)}), even though 1 and 2 both
+//   match Gt(0). The reason is that different matchers must be used for
+//   elements in different slots of the container.
+//
+// The matchers can be specified as an array, a pointer and count, a container,
+// an initializer list, or an STL iterator range. In each of these cases, the
+// underlying matchers can be either values or matchers.
+
+template <typename Iter>
+inline internal::UnorderedElementsAreArrayMatcher<
+    typename ::std::iterator_traits<Iter>::value_type>
+IsSubsetOf(Iter first, Iter last) {
+  typedef typename ::std::iterator_traits<Iter>::value_type T;
+  return internal::UnorderedElementsAreArrayMatcher<T>(
+      internal::UnorderedMatcherRequire::Subset, first, last);
+}
+
+template <typename T>
+inline internal::UnorderedElementsAreArrayMatcher<T> IsSubsetOf(
+    const T* pointer, size_t count) {
+  return IsSubsetOf(pointer, pointer + count);
+}
+
+template <typename T, size_t N>
+inline internal::UnorderedElementsAreArrayMatcher<T> IsSubsetOf(
+    const T (&array)[N]) {
+  return IsSubsetOf(array, N);
+}
+
+template <typename Container>
+inline internal::UnorderedElementsAreArrayMatcher<
+    typename Container::value_type>
+IsSubsetOf(const Container& container) {
+  return IsSubsetOf(container.begin(), container.end());
+}
+
+template <typename T>
+inline internal::UnorderedElementsAreArrayMatcher<T> IsSubsetOf(
+    ::std::initializer_list<T> xs) {
+  return IsSubsetOf(xs.begin(), xs.end());
+}
+
+// Matches an STL-style container or a native array that contains only
+// elements matching the given value or matcher.
+//
+// Each(m) is semantically equivalent to Not(Contains(Not(m))). Only
+// the messages are different.
+//
+// Examples:
+//   ::std::set<int> page_ids;
+//   // Each(m) matches an empty container, regardless of what m is.
+//   EXPECT_THAT(page_ids, Each(Eq(1)));
+//   EXPECT_THAT(page_ids, Each(Eq(77)));
+//
+//   page_ids.insert(3);
+//   EXPECT_THAT(page_ids, Each(Gt(0)));
+//   EXPECT_THAT(page_ids, Not(Each(Gt(4))));
+//   page_ids.insert(1);
+//   EXPECT_THAT(page_ids, Not(Each(Lt(2))));
+//
+//   ::std::map<int, size_t> page_lengths;
+//   page_lengths[1] = 100;
+//   page_lengths[2] = 200;
+//   page_lengths[3] = 300;
+//   EXPECT_THAT(page_lengths, Not(Each(Pair(1, 100))));
+//   EXPECT_THAT(page_lengths, Each(Key(Le(3))));
+//
+//   const char* user_ids[] = { "joe", "mike", "tom" };
+//   EXPECT_THAT(user_ids, Not(Each(Eq(::std::string("tom")))));
+template <typename M>
+inline internal::EachMatcher<M> Each(M matcher) {
+  return internal::EachMatcher<M>(matcher);
+}
+
+// Key(inner_matcher) matches an std::pair whose 'first' field matches
+// inner_matcher.  For example, Contains(Key(Ge(5))) can be used to match an
+// std::map that contains at least one element whose key is >= 5.
+template <typename M>
+inline internal::KeyMatcher<M> Key(M inner_matcher) {
+  return internal::KeyMatcher<M>(inner_matcher);
+}
+
+// Pair(first_matcher, second_matcher) matches a std::pair whose 'first' field
+// matches first_matcher and whose 'second' field matches second_matcher.  For
+// example, EXPECT_THAT(map_type, ElementsAre(Pair(Ge(5), "foo"))) can be used
+// to match a std::map<int, string> that contains exactly one element whose key
+// is >= 5 and whose value equals "foo".
+template <typename FirstMatcher, typename SecondMatcher>
+inline internal::PairMatcher<FirstMatcher, SecondMatcher>
+Pair(FirstMatcher first_matcher, SecondMatcher second_matcher) {
+  return internal::PairMatcher<FirstMatcher, SecondMatcher>(
+      first_matcher, second_matcher);
+}
+
+namespace no_adl {
+// FieldsAre(matchers...) matches piecewise the fields of compatible structs.
+// These include those that support `get<I>(obj)`, and when structured bindings
+// are enabled any class that supports them.
+// In particular, `std::tuple`, `std::pair`, `std::array` and aggregate types.
+template <typename... M>
+internal::FieldsAreMatcher<typename std::decay<M>::type...> FieldsAre(
+    M&&... matchers) {
+  return internal::FieldsAreMatcher<typename std::decay<M>::type...>(
+      std::forward<M>(matchers)...);
+}
+
+// Creates a matcher that matches a pointer (raw or smart) that matches
+// inner_matcher.
+template <typename InnerMatcher>
+inline internal::PointerMatcher<InnerMatcher> Pointer(
+    const InnerMatcher& inner_matcher) {
+  return internal::PointerMatcher<InnerMatcher>(inner_matcher);
+}
+
+// Creates a matcher that matches an object that has an address that matches
+// inner_matcher.
+template <typename InnerMatcher>
+inline internal::AddressMatcher<InnerMatcher> Address(
+    const InnerMatcher& inner_matcher) {
+  return internal::AddressMatcher<InnerMatcher>(inner_matcher);
+}
+}  // namespace no_adl
+
+// Returns a predicate that is satisfied by anything that matches the
+// given matcher.
+template <typename M>
+inline internal::MatcherAsPredicate<M> Matches(M matcher) {
+  return internal::MatcherAsPredicate<M>(matcher);
+}
+
+// Returns true if and only if the value matches the matcher.
+template <typename T, typename M>
+inline bool Value(const T& value, M matcher) {
+  return testing::Matches(matcher)(value);
+}
+
+// Matches the value against the given matcher and explains the match
+// result to listener.
+template <typename T, typename M>
+inline bool ExplainMatchResult(
+    M matcher, const T& value, MatchResultListener* listener) {
+  return SafeMatcherCast<const T&>(matcher).MatchAndExplain(value, listener);
+}
+
+// Returns a string representation of the given matcher.  Useful for description
+// strings of matchers defined using MATCHER_P* macros that accept matchers as
+// their arguments.  For example:
+//
+// MATCHER_P(XAndYThat, matcher,
+//           "X that " + DescribeMatcher<int>(matcher, negation) +
+//               " and Y that " + DescribeMatcher<double>(matcher, negation)) {
+//   return ExplainMatchResult(matcher, arg.x(), result_listener) &&
+//          ExplainMatchResult(matcher, arg.y(), result_listener);
+// }
+template <typename T, typename M>
+std::string DescribeMatcher(const M& matcher, bool negation = false) {
+  ::std::stringstream ss;
+  Matcher<T> monomorphic_matcher = SafeMatcherCast<T>(matcher);
+  if (negation) {
+    monomorphic_matcher.DescribeNegationTo(&ss);
+  } else {
+    monomorphic_matcher.DescribeTo(&ss);
+  }
+  return ss.str();
+}
+
+template <typename... Args>
+internal::ElementsAreMatcher<
+    std::tuple<typename std::decay<const Args&>::type...>>
+ElementsAre(const Args&... matchers) {
+  return internal::ElementsAreMatcher<
+      std::tuple<typename std::decay<const Args&>::type...>>(
+      std::make_tuple(matchers...));
+}
+
+template <typename... Args>
+internal::UnorderedElementsAreMatcher<
+    std::tuple<typename std::decay<const Args&>::type...>>
+UnorderedElementsAre(const Args&... matchers) {
+  return internal::UnorderedElementsAreMatcher<
+      std::tuple<typename std::decay<const Args&>::type...>>(
+      std::make_tuple(matchers...));
+}
+
+// Define variadic matcher versions.
+template <typename... Args>
+internal::AllOfMatcher<typename std::decay<const Args&>::type...> AllOf(
+    const Args&... matchers) {
+  return internal::AllOfMatcher<typename std::decay<const Args&>::type...>(
+      matchers...);
+}
+
+template <typename... Args>
+internal::AnyOfMatcher<typename std::decay<const Args&>::type...> AnyOf(
+    const Args&... matchers) {
+  return internal::AnyOfMatcher<typename std::decay<const Args&>::type...>(
+      matchers...);
+}
+
+// AnyOfArray(array)
+// AnyOfArray(pointer, count)
+// AnyOfArray(container)
+// AnyOfArray({ e1, e2, ..., en })
+// AnyOfArray(iterator_first, iterator_last)
+//
+// AnyOfArray() verifies whether a given value matches any member of a
+// collection of matchers.
+//
+// AllOfArray(array)
+// AllOfArray(pointer, count)
+// AllOfArray(container)
+// AllOfArray({ e1, e2, ..., en })
+// AllOfArray(iterator_first, iterator_last)
+//
+// AllOfArray() verifies whether a given value matches all members of a
+// collection of matchers.
+//
+// The matchers can be specified as an array, a pointer and count, a container,
+// an initializer list, or an STL iterator range. In each of these cases, the
+// underlying matchers can be either values or matchers.
+
+template <typename Iter>
+inline internal::AnyOfArrayMatcher<
+    typename ::std::iterator_traits<Iter>::value_type>
+AnyOfArray(Iter first, Iter last) {
+  return internal::AnyOfArrayMatcher<
+      typename ::std::iterator_traits<Iter>::value_type>(first, last);
+}
+
+template <typename Iter>
+inline internal::AllOfArrayMatcher<
+    typename ::std::iterator_traits<Iter>::value_type>
+AllOfArray(Iter first, Iter last) {
+  return internal::AllOfArrayMatcher<
+      typename ::std::iterator_traits<Iter>::value_type>(first, last);
+}
+
+template <typename T>
+inline internal::AnyOfArrayMatcher<T> AnyOfArray(const T* ptr, size_t count) {
+  return AnyOfArray(ptr, ptr + count);
+}
+
+template <typename T>
+inline internal::AllOfArrayMatcher<T> AllOfArray(const T* ptr, size_t count) {
+  return AllOfArray(ptr, ptr + count);
+}
+
+template <typename T, size_t N>
+inline internal::AnyOfArrayMatcher<T> AnyOfArray(const T (&array)[N]) {
+  return AnyOfArray(array, N);
+}
+
+template <typename T, size_t N>
+inline internal::AllOfArrayMatcher<T> AllOfArray(const T (&array)[N]) {
+  return AllOfArray(array, N);
+}
+
+template <typename Container>
+inline internal::AnyOfArrayMatcher<typename Container::value_type> AnyOfArray(
+    const Container& container) {
+  return AnyOfArray(container.begin(), container.end());
+}
+
+template <typename Container>
+inline internal::AllOfArrayMatcher<typename Container::value_type> AllOfArray(
+    const Container& container) {
+  return AllOfArray(container.begin(), container.end());
+}
+
+template <typename T>
+inline internal::AnyOfArrayMatcher<T> AnyOfArray(
+    ::std::initializer_list<T> xs) {
+  return AnyOfArray(xs.begin(), xs.end());
+}
+
+template <typename T>
+inline internal::AllOfArrayMatcher<T> AllOfArray(
+    ::std::initializer_list<T> xs) {
+  return AllOfArray(xs.begin(), xs.end());
+}
+
+// Args<N1, N2, ..., Nk>(a_matcher) matches a tuple if the selected
+// fields of it matches a_matcher.  C++ doesn't support default
+// arguments for function templates, so we have to overload it.
+template <size_t... k, typename InnerMatcher>
+internal::ArgsMatcher<typename std::decay<InnerMatcher>::type, k...> Args(
+    InnerMatcher&& matcher) {
+  return internal::ArgsMatcher<typename std::decay<InnerMatcher>::type, k...>(
+      std::forward<InnerMatcher>(matcher));
+}
+
+// AllArgs(m) is a synonym of m.  This is useful in
+//
+//   EXPECT_CALL(foo, Bar(_, _)).With(AllArgs(Eq()));
+//
+// which is easier to read than
+//
+//   EXPECT_CALL(foo, Bar(_, _)).With(Eq());
+template <typename InnerMatcher>
+inline InnerMatcher AllArgs(const InnerMatcher& matcher) { return matcher; }
+
+// Returns a matcher that matches the value of an optional<> type variable.
+// The matcher implementation only uses '!arg' and requires that the optional<>
+// type has a 'value_type' member type and that '*arg' is of type 'value_type'
+// and is printable using 'PrintToString'. It is compatible with
+// std::optional/std::experimental::optional.
+// Note that to compare an optional type variable against nullopt you should
+// use Eq(nullopt) and not Eq(Optional(nullopt)). The latter implies that the
+// optional value contains an optional itself.
+template <typename ValueMatcher>
+inline internal::OptionalMatcher<ValueMatcher> Optional(
+    const ValueMatcher& value_matcher) {
+  return internal::OptionalMatcher<ValueMatcher>(value_matcher);
+}
+
+// Returns a matcher that matches the value of a absl::any type variable.
+template <typename T>
+PolymorphicMatcher<internal::any_cast_matcher::AnyCastMatcher<T> > AnyWith(
+    const Matcher<const T&>& matcher) {
+  return MakePolymorphicMatcher(
+      internal::any_cast_matcher::AnyCastMatcher<T>(matcher));
+}
+
+// Returns a matcher that matches the value of a variant<> type variable.
+// The matcher implementation uses ADL to find the holds_alternative and get
+// functions.
+// It is compatible with std::variant.
+template <typename T>
+PolymorphicMatcher<internal::variant_matcher::VariantMatcher<T> > VariantWith(
+    const Matcher<const T&>& matcher) {
+  return MakePolymorphicMatcher(
+      internal::variant_matcher::VariantMatcher<T>(matcher));
+}
+
+#if GTEST_HAS_EXCEPTIONS
+
+// Anything inside the `internal` namespace is internal to the implementation
+// and must not be used in user code!
+namespace internal {
+
+class WithWhatMatcherImpl {
+ public:
+  WithWhatMatcherImpl(Matcher<std::string> matcher)
+      : matcher_(std::move(matcher)) {}
+
+  void DescribeTo(std::ostream* os) const {
+    *os << "contains .what() that ";
+    matcher_.DescribeTo(os);
+  }
+
+  void DescribeNegationTo(std::ostream* os) const {
+    *os << "contains .what() that does not ";
+    matcher_.DescribeTo(os);
+  }
+
+  template <typename Err>
+  bool MatchAndExplain(const Err& err, MatchResultListener* listener) const {
+    *listener << "which contains .what() that ";
+    return matcher_.MatchAndExplain(err.what(), listener);
+  }
+
+ private:
+  const Matcher<std::string> matcher_;
+};
+
+inline PolymorphicMatcher<WithWhatMatcherImpl> WithWhat(
+    Matcher<std::string> m) {
+  return MakePolymorphicMatcher(WithWhatMatcherImpl(std::move(m)));
+}
+
+template <typename Err>
+class ExceptionMatcherImpl {
+  class NeverThrown {
+   public:
+    const char* what() const noexcept {
+      return "this exception should never be thrown";
+    }
+  };
+
+  // If the matchee raises an exception of a wrong type, we'd like to
+  // catch it and print its message and type. To do that, we add an additional
+  // catch clause:
+  //
+  //     try { ... }
+  //     catch (const Err&) { /* an expected exception */ }
+  //     catch (const std::exception&) { /* exception of a wrong type */ }
+  //
+  // However, if the `Err` itself is `std::exception`, we'd end up with two
+  // identical `catch` clauses:
+  //
+  //     try { ... }
+  //     catch (const std::exception&) { /* an expected exception */ }
+  //     catch (const std::exception&) { /* exception of a wrong type */ }
+  //
+  // This can cause a warning or an error in some compilers. To resolve
+  // the issue, we use a fake error type whenever `Err` is `std::exception`:
+  //
+  //     try { ... }
+  //     catch (const std::exception&) { /* an expected exception */ }
+  //     catch (const NeverThrown&) { /* exception of a wrong type */ }
+  using DefaultExceptionType = typename std::conditional<
+      std::is_same<typename std::remove_cv<
+                       typename std::remove_reference<Err>::type>::type,
+                   std::exception>::value,
+      const NeverThrown&, const std::exception&>::type;
+
+ public:
+  ExceptionMatcherImpl(Matcher<const Err&> matcher)
+      : matcher_(std::move(matcher)) {}
+
+  void DescribeTo(std::ostream* os) const {
+    *os << "throws an exception which is a " << GetTypeName<Err>();
+    *os << " which ";
+    matcher_.DescribeTo(os);
+  }
+
+  void DescribeNegationTo(std::ostream* os) const {
+    *os << "throws an exception which is not a " << GetTypeName<Err>();
+    *os << " which ";
+    matcher_.DescribeNegationTo(os);
+  }
+
+  template <typename T>
+  bool MatchAndExplain(T&& x, MatchResultListener* listener) const {
+    try {
+      (void)(std::forward<T>(x)());
+    } catch (const Err& err) {
+      *listener << "throws an exception which is a " << GetTypeName<Err>();
+      *listener << " ";
+      return matcher_.MatchAndExplain(err, listener);
+    } catch (DefaultExceptionType err) {
+#if GTEST_HAS_RTTI
+      *listener << "throws an exception of type " << GetTypeName(typeid(err));
+      *listener << " ";
+#else
+      *listener << "throws an std::exception-derived type ";
+#endif
+      *listener << "with description \"" << err.what() << "\"";
+      return false;
+    } catch (...) {
+      *listener << "throws an exception of an unknown type";
+      return false;
+    }
+
+    *listener << "does not throw any exception";
+    return false;
+  }
+
+ private:
+  const Matcher<const Err&> matcher_;
+};
+
+}  // namespace internal
+
+// Throws()
+// Throws(exceptionMatcher)
+// ThrowsMessage(messageMatcher)
+//
+// This matcher accepts a callable and verifies that when invoked, it throws
+// an exception with the given type and properties.
+//
+// Examples:
+//
+//   EXPECT_THAT(
+//       []() { throw std::runtime_error("message"); },
+//       Throws<std::runtime_error>());
+//
+//   EXPECT_THAT(
+//       []() { throw std::runtime_error("message"); },
+//       ThrowsMessage<std::runtime_error>(HasSubstr("message")));
+//
+//   EXPECT_THAT(
+//       []() { throw std::runtime_error("message"); },
+//       Throws<std::runtime_error>(
+//           Property(&std::runtime_error::what, HasSubstr("message"))));
+
+template <typename Err>
+PolymorphicMatcher<internal::ExceptionMatcherImpl<Err>> Throws() {
+  return MakePolymorphicMatcher(
+      internal::ExceptionMatcherImpl<Err>(A<const Err&>()));
+}
+
+template <typename Err, typename ExceptionMatcher>
+PolymorphicMatcher<internal::ExceptionMatcherImpl<Err>> Throws(
+    const ExceptionMatcher& exception_matcher) {
+  // Using matcher cast allows users to pass a matcher of a more broad type.
+  // For example user may want to pass Matcher<std::exception>
+  // to Throws<std::runtime_error>, or Matcher<int64> to Throws<int32>.
+  return MakePolymorphicMatcher(internal::ExceptionMatcherImpl<Err>(
+      SafeMatcherCast<const Err&>(exception_matcher)));
+}
+
+template <typename Err, typename MessageMatcher>
+PolymorphicMatcher<internal::ExceptionMatcherImpl<Err>> ThrowsMessage(
+    MessageMatcher&& message_matcher) {
+  static_assert(std::is_base_of<std::exception, Err>::value,
+                "expected an std::exception-derived type");
+  return Throws<Err>(internal::WithWhat(
+      MatcherCast<std::string>(std::forward<MessageMatcher>(message_matcher))));
+}
+
+#endif  // GTEST_HAS_EXCEPTIONS
+
+// These macros allow using matchers to check values in Google Test
+// tests.  ASSERT_THAT(value, matcher) and EXPECT_THAT(value, matcher)
+// succeed if and only if the value matches the matcher.  If the assertion
+// fails, the value and the description of the matcher will be printed.
+#define ASSERT_THAT(value, matcher) ASSERT_PRED_FORMAT1(\
+    ::testing::internal::MakePredicateFormatterFromMatcher(matcher), value)
+#define EXPECT_THAT(value, matcher) EXPECT_PRED_FORMAT1(\
+    ::testing::internal::MakePredicateFormatterFromMatcher(matcher), value)
+
+// MATCHER* macroses itself are listed below.
+#define MATCHER(name, description)                                             \
+  class name##Matcher                                                          \
+      : public ::testing::internal::MatcherBaseImpl<name##Matcher> {           \
+   public:                                                                     \
+    template <typename arg_type>                                               \
+    class gmock_Impl : public ::testing::MatcherInterface<const arg_type&> {   \
+     public:                                                                   \
+      gmock_Impl() {}                                                          \
+      bool MatchAndExplain(                                                    \
+          const arg_type& arg,                                                 \
+          ::testing::MatchResultListener* result_listener) const override;     \
+      void DescribeTo(::std::ostream* gmock_os) const override {               \
+        *gmock_os << FormatDescription(false);                                 \
+      }                                                                        \
+      void DescribeNegationTo(::std::ostream* gmock_os) const override {       \
+        *gmock_os << FormatDescription(true);                                  \
+      }                                                                        \
+                                                                               \
+     private:                                                                  \
+      ::std::string FormatDescription(bool negation) const {                   \
+        ::std::string gmock_description = (description);                       \
+        if (!gmock_description.empty()) {                                      \
+          return gmock_description;                                            \
+        }                                                                      \
+        return ::testing::internal::FormatMatcherDescription(negation, #name,  \
+                                                             {});              \
+      }                                                                        \
+    };                                                                         \
+  };                                                                           \
+  GTEST_ATTRIBUTE_UNUSED_ inline name##Matcher name() { return {}; }           \
+  template <typename arg_type>                                                 \
+  bool name##Matcher::gmock_Impl<arg_type>::MatchAndExplain(                   \
+      const arg_type& arg,                                                     \
+      ::testing::MatchResultListener* result_listener GTEST_ATTRIBUTE_UNUSED_) \
+      const
+
+#define MATCHER_P(name, p0, description) \
+  GMOCK_INTERNAL_MATCHER(name, name##MatcherP, description, (p0))
+#define MATCHER_P2(name, p0, p1, description) \
+  GMOCK_INTERNAL_MATCHER(name, name##MatcherP2, description, (p0, p1))
+#define MATCHER_P3(name, p0, p1, p2, description) \
+  GMOCK_INTERNAL_MATCHER(name, name##MatcherP3, description, (p0, p1, p2))
+#define MATCHER_P4(name, p0, p1, p2, p3, description) \
+  GMOCK_INTERNAL_MATCHER(name, name##MatcherP4, description, (p0, p1, p2, p3))
+#define MATCHER_P5(name, p0, p1, p2, p3, p4, description)    \
+  GMOCK_INTERNAL_MATCHER(name, name##MatcherP5, description, \
+                         (p0, p1, p2, p3, p4))
+#define MATCHER_P6(name, p0, p1, p2, p3, p4, p5, description) \
+  GMOCK_INTERNAL_MATCHER(name, name##MatcherP6, description,  \
+                         (p0, p1, p2, p3, p4, p5))
+#define MATCHER_P7(name, p0, p1, p2, p3, p4, p5, p6, description) \
+  GMOCK_INTERNAL_MATCHER(name, name##MatcherP7, description,      \
+                         (p0, p1, p2, p3, p4, p5, p6))
+#define MATCHER_P8(name, p0, p1, p2, p3, p4, p5, p6, p7, description) \
+  GMOCK_INTERNAL_MATCHER(name, name##MatcherP8, description,          \
+                         (p0, p1, p2, p3, p4, p5, p6, p7))
+#define MATCHER_P9(name, p0, p1, p2, p3, p4, p5, p6, p7, p8, description) \
+  GMOCK_INTERNAL_MATCHER(name, name##MatcherP9, description,              \
+                         (p0, p1, p2, p3, p4, p5, p6, p7, p8))
+#define MATCHER_P10(name, p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, description) \
+  GMOCK_INTERNAL_MATCHER(name, name##MatcherP10, description,                  \
+                         (p0, p1, p2, p3, p4, p5, p6, p7, p8, p9))
+
+#define GMOCK_INTERNAL_MATCHER(name, full_name, description, args)             \
+  template <GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAMS(args)>                      \
+  class full_name : public ::testing::internal::MatcherBaseImpl<               \
+                        full_name<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)>> { \
+   public:                                                                     \
+    using full_name::MatcherBaseImpl::MatcherBaseImpl;                         \
+    template <typename arg_type>                                               \
+    class gmock_Impl : public ::testing::MatcherInterface<const arg_type&> {   \
+     public:                                                                   \
+      explicit gmock_Impl(GMOCK_INTERNAL_MATCHER_FUNCTION_ARGS(args))          \
+          : GMOCK_INTERNAL_MATCHER_FORWARD_ARGS(args) {}                       \
+      bool MatchAndExplain(                                                    \
+          const arg_type& arg,                                                 \
+          ::testing::MatchResultListener* result_listener) const override;     \
+      void DescribeTo(::std::ostream* gmock_os) const override {               \
+        *gmock_os << FormatDescription(false);                                 \
+      }                                                                        \
+      void DescribeNegationTo(::std::ostream* gmock_os) const override {       \
+        *gmock_os << FormatDescription(true);                                  \
+      }                                                                        \
+      GMOCK_INTERNAL_MATCHER_MEMBERS(args)                                     \
+                                                                               \
+     private:                                                                  \
+      ::std::string FormatDescription(bool negation) const {                   \
+        ::std::string gmock_description = (description);                       \
+        if (!gmock_description.empty()) {                                      \
+          return gmock_description;                                            \
+        }                                                                      \
+        return ::testing::internal::FormatMatcherDescription(                  \
+            negation, #name,                                                   \
+            ::testing::internal::UniversalTersePrintTupleFieldsToStrings(      \
+                ::std::tuple<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)>(        \
+                    GMOCK_INTERNAL_MATCHER_MEMBERS_USAGE(args))));             \
+      }                                                                        \
+    };                                                                         \
+  };                                                                           \
+  template <GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAMS(args)>                      \
+  inline full_name<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)> name(             \
+      GMOCK_INTERNAL_MATCHER_FUNCTION_ARGS(args)) {                            \
+    return full_name<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)>(                \
+        GMOCK_INTERNAL_MATCHER_ARGS_USAGE(args));                              \
+  }                                                                            \
+  template <GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAMS(args)>                      \
+  template <typename arg_type>                                                 \
+  bool full_name<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)>::gmock_Impl<        \
+      arg_type>::MatchAndExplain(const arg_type& arg,                          \
+                                 ::testing::MatchResultListener*               \
+                                     result_listener GTEST_ATTRIBUTE_UNUSED_)  \
+      const
+
+#define GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAMS(args) \
+  GMOCK_PP_TAIL(                                     \
+      GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAM, , args))
+#define GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAM(i_unused, data_unused, arg) \
+  , typename arg##_type
+
+#define GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args) \
+  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_TYPE_PARAM, , args))
+#define GMOCK_INTERNAL_MATCHER_TYPE_PARAM(i_unused, data_unused, arg) \
+  , arg##_type
+
+#define GMOCK_INTERNAL_MATCHER_FUNCTION_ARGS(args) \
+  GMOCK_PP_TAIL(dummy_first GMOCK_PP_FOR_EACH(     \
+      GMOCK_INTERNAL_MATCHER_FUNCTION_ARG, , args))
+#define GMOCK_INTERNAL_MATCHER_FUNCTION_ARG(i, data_unused, arg) \
+  , arg##_type gmock_p##i
+
+#define GMOCK_INTERNAL_MATCHER_FORWARD_ARGS(args) \
+  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_FORWARD_ARG, , args))
+#define GMOCK_INTERNAL_MATCHER_FORWARD_ARG(i, data_unused, arg) \
+  , arg(::std::forward<arg##_type>(gmock_p##i))
+
+#define GMOCK_INTERNAL_MATCHER_MEMBERS(args) \
+  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_MEMBER, , args)
+#define GMOCK_INTERNAL_MATCHER_MEMBER(i_unused, data_unused, arg) \
+  const arg##_type arg;
+
+#define GMOCK_INTERNAL_MATCHER_MEMBERS_USAGE(args) \
+  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_MEMBER_USAGE, , args))
+#define GMOCK_INTERNAL_MATCHER_MEMBER_USAGE(i_unused, data_unused, arg) , arg
+
+#define GMOCK_INTERNAL_MATCHER_ARGS_USAGE(args) \
+  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_ARG_USAGE, , args))
+#define GMOCK_INTERNAL_MATCHER_ARG_USAGE(i, data_unused, arg_unused) \
+  , gmock_p##i
+
+// To prevent ADL on certain functions we put them on a separate namespace.
+using namespace no_adl;  // NOLINT
+
+}  // namespace testing
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251 5046
+
+// Include any custom callback matchers added by the local installation.
+// We must include this header at the end to make sure it can use the
+// declarations from this file.
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Injection point for custom user configurations. See README for details
+//
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_MATCHERS_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_MATCHERS_H_
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_MATCHERS_H_
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_
+
+#if GTEST_HAS_EXCEPTIONS
+# include <stdexcept>  // NOLINT
+#endif
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
+/* class A needs to have dll-interface to be used by clients of class B */)
+
+namespace testing {
+
+// An abstract handle of an expectation.
+class Expectation;
+
+// A set of expectation handles.
+class ExpectationSet;
+
+// Anything inside the 'internal' namespace IS INTERNAL IMPLEMENTATION
+// and MUST NOT BE USED IN USER CODE!!!
+namespace internal {
+
+// Implements a mock function.
+template <typename F> class FunctionMocker;
+
+// Base class for expectations.
+class ExpectationBase;
+
+// Implements an expectation.
+template <typename F> class TypedExpectation;
+
+// Helper class for testing the Expectation class template.
+class ExpectationTester;
+
+// Helper classes for implementing NiceMock, StrictMock, and NaggyMock.
+template <typename MockClass>
+class NiceMockImpl;
+template <typename MockClass>
+class StrictMockImpl;
+template <typename MockClass>
+class NaggyMockImpl;
+
+// Protects the mock object registry (in class Mock), all function
+// mockers, and all expectations.
+//
+// The reason we don't use more fine-grained protection is: when a
+// mock function Foo() is called, it needs to consult its expectations
+// to see which one should be picked.  If another thread is allowed to
+// call a mock function (either Foo() or a different one) at the same
+// time, it could affect the "retired" attributes of Foo()'s
+// expectations when InSequence() is used, and thus affect which
+// expectation gets picked.  Therefore, we sequence all mock function
+// calls to ensure the integrity of the mock objects' states.
+GTEST_API_ GTEST_DECLARE_STATIC_MUTEX_(g_gmock_mutex);
+
+// Untyped base class for ActionResultHolder<R>.
+class UntypedActionResultHolderBase;
+
+// Abstract base class of FunctionMocker.  This is the
+// type-agnostic part of the function mocker interface.  Its pure
+// virtual methods are implemented by FunctionMocker.
+class GTEST_API_ UntypedFunctionMockerBase {
+ public:
+  UntypedFunctionMockerBase();
+  virtual ~UntypedFunctionMockerBase();
+
+  // Verifies that all expectations on this mock function have been
+  // satisfied.  Reports one or more Google Test non-fatal failures
+  // and returns false if not.
+  bool VerifyAndClearExpectationsLocked()
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
+
+  // Clears the ON_CALL()s set on this mock function.
+  virtual void ClearDefaultActionsLocked()
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) = 0;
+
+  // In all of the following Untyped* functions, it's the caller's
+  // responsibility to guarantee the correctness of the arguments'
+  // types.
+
+  // Performs the default action with the given arguments and returns
+  // the action's result.  The call description string will be used in
+  // the error message to describe the call in the case the default
+  // action fails.
+  // L = *
+  virtual UntypedActionResultHolderBase* UntypedPerformDefaultAction(
+      void* untyped_args, const std::string& call_description) const = 0;
+
+  // Performs the given action with the given arguments and returns
+  // the action's result.
+  // L = *
+  virtual UntypedActionResultHolderBase* UntypedPerformAction(
+      const void* untyped_action, void* untyped_args) const = 0;
+
+  // Writes a message that the call is uninteresting (i.e. neither
+  // explicitly expected nor explicitly unexpected) to the given
+  // ostream.
+  virtual void UntypedDescribeUninterestingCall(
+      const void* untyped_args,
+      ::std::ostream* os) const
+          GTEST_LOCK_EXCLUDED_(g_gmock_mutex) = 0;
+
+  // Returns the expectation that matches the given function arguments
+  // (or NULL is there's no match); when a match is found,
+  // untyped_action is set to point to the action that should be
+  // performed (or NULL if the action is "do default"), and
+  // is_excessive is modified to indicate whether the call exceeds the
+  // expected number.
+  virtual const ExpectationBase* UntypedFindMatchingExpectation(
+      const void* untyped_args,
+      const void** untyped_action, bool* is_excessive,
+      ::std::ostream* what, ::std::ostream* why)
+          GTEST_LOCK_EXCLUDED_(g_gmock_mutex) = 0;
+
+  // Prints the given function arguments to the ostream.
+  virtual void UntypedPrintArgs(const void* untyped_args,
+                                ::std::ostream* os) const = 0;
+
+  // Sets the mock object this mock method belongs to, and registers
+  // this information in the global mock registry.  Will be called
+  // whenever an EXPECT_CALL() or ON_CALL() is executed on this mock
+  // method.
+  void RegisterOwner(const void* mock_obj)
+      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
+
+  // Sets the mock object this mock method belongs to, and sets the
+  // name of the mock function.  Will be called upon each invocation
+  // of this mock function.
+  void SetOwnerAndName(const void* mock_obj, const char* name)
+      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
+
+  // Returns the mock object this mock method belongs to.  Must be
+  // called after RegisterOwner() or SetOwnerAndName() has been
+  // called.
+  const void* MockObject() const
+      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
+
+  // Returns the name of this mock method.  Must be called after
+  // SetOwnerAndName() has been called.
+  const char* Name() const
+      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
+
+  // Returns the result of invoking this mock function with the given
+  // arguments.  This function can be safely called from multiple
+  // threads concurrently.  The caller is responsible for deleting the
+  // result.
+  UntypedActionResultHolderBase* UntypedInvokeWith(void* untyped_args)
+      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
+
+ protected:
+  typedef std::vector<const void*> UntypedOnCallSpecs;
+
+  using UntypedExpectations = std::vector<std::shared_ptr<ExpectationBase>>;
+
+  // Returns an Expectation object that references and co-owns exp,
+  // which must be an expectation on this mock function.
+  Expectation GetHandleOf(ExpectationBase* exp);
+
+  // Address of the mock object this mock method belongs to.  Only
+  // valid after this mock method has been called or
+  // ON_CALL/EXPECT_CALL has been invoked on it.
+  const void* mock_obj_;  // Protected by g_gmock_mutex.
+
+  // Name of the function being mocked.  Only valid after this mock
+  // method has been called.
+  const char* name_;  // Protected by g_gmock_mutex.
+
+  // All default action specs for this function mocker.
+  UntypedOnCallSpecs untyped_on_call_specs_;
+
+  // All expectations for this function mocker.
+  //
+  // It's undefined behavior to interleave expectations (EXPECT_CALLs
+  // or ON_CALLs) and mock function calls.  Also, the order of
+  // expectations is important.  Therefore it's a logic race condition
+  // to read/write untyped_expectations_ concurrently.  In order for
+  // tools like tsan to catch concurrent read/write accesses to
+  // untyped_expectations, we deliberately leave accesses to it
+  // unprotected.
+  UntypedExpectations untyped_expectations_;
+};  // class UntypedFunctionMockerBase
+
+// Untyped base class for OnCallSpec<F>.
+class UntypedOnCallSpecBase {
+ public:
+  // The arguments are the location of the ON_CALL() statement.
+  UntypedOnCallSpecBase(const char* a_file, int a_line)
+      : file_(a_file), line_(a_line), last_clause_(kNone) {}
+
+  // Where in the source file was the default action spec defined?
+  const char* file() const { return file_; }
+  int line() const { return line_; }
+
+ protected:
+  // Gives each clause in the ON_CALL() statement a name.
+  enum Clause {
+    // Do not change the order of the enum members!  The run-time
+    // syntax checking relies on it.
+    kNone,
+    kWith,
+    kWillByDefault
+  };
+
+  // Asserts that the ON_CALL() statement has a certain property.
+  void AssertSpecProperty(bool property,
+                          const std::string& failure_message) const {
+    Assert(property, file_, line_, failure_message);
+  }
+
+  // Expects that the ON_CALL() statement has a certain property.
+  void ExpectSpecProperty(bool property,
+                          const std::string& failure_message) const {
+    Expect(property, file_, line_, failure_message);
+  }
+
+  const char* file_;
+  int line_;
+
+  // The last clause in the ON_CALL() statement as seen so far.
+  // Initially kNone and changes as the statement is parsed.
+  Clause last_clause_;
+};  // class UntypedOnCallSpecBase
+
+// This template class implements an ON_CALL spec.
+template <typename F>
+class OnCallSpec : public UntypedOnCallSpecBase {
+ public:
+  typedef typename Function<F>::ArgumentTuple ArgumentTuple;
+  typedef typename Function<F>::ArgumentMatcherTuple ArgumentMatcherTuple;
+
+  // Constructs an OnCallSpec object from the information inside
+  // the parenthesis of an ON_CALL() statement.
+  OnCallSpec(const char* a_file, int a_line,
+             const ArgumentMatcherTuple& matchers)
+      : UntypedOnCallSpecBase(a_file, a_line),
+        matchers_(matchers),
+        // By default, extra_matcher_ should match anything.  However,
+        // we cannot initialize it with _ as that causes ambiguity between
+        // Matcher's copy and move constructor for some argument types.
+        extra_matcher_(A<const ArgumentTuple&>()) {}
+
+  // Implements the .With() clause.
+  OnCallSpec& With(const Matcher<const ArgumentTuple&>& m) {
+    // Makes sure this is called at most once.
+    ExpectSpecProperty(last_clause_ < kWith,
+                       ".With() cannot appear "
+                       "more than once in an ON_CALL().");
+    last_clause_ = kWith;
+
+    extra_matcher_ = m;
+    return *this;
+  }
+
+  // Implements the .WillByDefault() clause.
+  OnCallSpec& WillByDefault(const Action<F>& action) {
+    ExpectSpecProperty(last_clause_ < kWillByDefault,
+                       ".WillByDefault() must appear "
+                       "exactly once in an ON_CALL().");
+    last_clause_ = kWillByDefault;
+
+    ExpectSpecProperty(!action.IsDoDefault(),
+                       "DoDefault() cannot be used in ON_CALL().");
+    action_ = action;
+    return *this;
+  }
+
+  // Returns true if and only if the given arguments match the matchers.
+  bool Matches(const ArgumentTuple& args) const {
+    return TupleMatches(matchers_, args) && extra_matcher_.Matches(args);
+  }
+
+  // Returns the action specified by the user.
+  const Action<F>& GetAction() const {
+    AssertSpecProperty(last_clause_ == kWillByDefault,
+                       ".WillByDefault() must appear exactly "
+                       "once in an ON_CALL().");
+    return action_;
+  }
+
+ private:
+  // The information in statement
+  //
+  //   ON_CALL(mock_object, Method(matchers))
+  //       .With(multi-argument-matcher)
+  //       .WillByDefault(action);
+  //
+  // is recorded in the data members like this:
+  //
+  //   source file that contains the statement => file_
+  //   line number of the statement            => line_
+  //   matchers                                => matchers_
+  //   multi-argument-matcher                  => extra_matcher_
+  //   action                                  => action_
+  ArgumentMatcherTuple matchers_;
+  Matcher<const ArgumentTuple&> extra_matcher_;
+  Action<F> action_;
+};  // class OnCallSpec
+
+// Possible reactions on uninteresting calls.
+enum CallReaction {
+  kAllow,
+  kWarn,
+  kFail,
+};
+
+}  // namespace internal
+
+// Utilities for manipulating mock objects.
+class GTEST_API_ Mock {
+ public:
+  // The following public methods can be called concurrently.
+
+  // Tells Google Mock to ignore mock_obj when checking for leaked
+  // mock objects.
+  static void AllowLeak(const void* mock_obj)
+      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
+
+  // Verifies and clears all expectations on the given mock object.
+  // If the expectations aren't satisfied, generates one or more
+  // Google Test non-fatal failures and returns false.
+  static bool VerifyAndClearExpectations(void* mock_obj)
+      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
+
+  // Verifies all expectations on the given mock object and clears its
+  // default actions and expectations.  Returns true if and only if the
+  // verification was successful.
+  static bool VerifyAndClear(void* mock_obj)
+      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
+
+  // Returns whether the mock was created as a naggy mock (default)
+  static bool IsNaggy(void* mock_obj)
+      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
+  // Returns whether the mock was created as a nice mock
+  static bool IsNice(void* mock_obj)
+      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
+  // Returns whether the mock was created as a strict mock
+  static bool IsStrict(void* mock_obj)
+      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
+
+ private:
+  friend class internal::UntypedFunctionMockerBase;
+
+  // Needed for a function mocker to register itself (so that we know
+  // how to clear a mock object).
+  template <typename F>
+  friend class internal::FunctionMocker;
+
+  template <typename MockClass>
+  friend class internal::NiceMockImpl;
+  template <typename MockClass>
+  friend class internal::NaggyMockImpl;
+  template <typename MockClass>
+  friend class internal::StrictMockImpl;
+
+  // Tells Google Mock to allow uninteresting calls on the given mock
+  // object.
+  static void AllowUninterestingCalls(const void* mock_obj)
+      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
+
+  // Tells Google Mock to warn the user about uninteresting calls on
+  // the given mock object.
+  static void WarnUninterestingCalls(const void* mock_obj)
+      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
+
+  // Tells Google Mock to fail uninteresting calls on the given mock
+  // object.
+  static void FailUninterestingCalls(const void* mock_obj)
+      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
+
+  // Tells Google Mock the given mock object is being destroyed and
+  // its entry in the call-reaction table should be removed.
+  static void UnregisterCallReaction(const void* mock_obj)
+      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
+
+  // Returns the reaction Google Mock will have on uninteresting calls
+  // made on the given mock object.
+  static internal::CallReaction GetReactionOnUninterestingCalls(
+      const void* mock_obj)
+          GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
+
+  // Verifies that all expectations on the given mock object have been
+  // satisfied.  Reports one or more Google Test non-fatal failures
+  // and returns false if not.
+  static bool VerifyAndClearExpectationsLocked(void* mock_obj)
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex);
+
+  // Clears all ON_CALL()s set on the given mock object.
+  static void ClearDefaultActionsLocked(void* mock_obj)
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex);
+
+  // Registers a mock object and a mock method it owns.
+  static void Register(
+      const void* mock_obj,
+      internal::UntypedFunctionMockerBase* mocker)
+          GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
+
+  // Tells Google Mock where in the source code mock_obj is used in an
+  // ON_CALL or EXPECT_CALL.  In case mock_obj is leaked, this
+  // information helps the user identify which object it is.
+  static void RegisterUseByOnCallOrExpectCall(
+      const void* mock_obj, const char* file, int line)
+          GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
+
+  // Unregisters a mock method; removes the owning mock object from
+  // the registry when the last mock method associated with it has
+  // been unregistered.  This is called only in the destructor of
+  // FunctionMocker.
+  static void UnregisterLocked(internal::UntypedFunctionMockerBase* mocker)
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex);
+};  // class Mock
+
+// An abstract handle of an expectation.  Useful in the .After()
+// clause of EXPECT_CALL() for setting the (partial) order of
+// expectations.  The syntax:
+//
+//   Expectation e1 = EXPECT_CALL(...)...;
+//   EXPECT_CALL(...).After(e1)...;
+//
+// sets two expectations where the latter can only be matched after
+// the former has been satisfied.
+//
+// Notes:
+//   - This class is copyable and has value semantics.
+//   - Constness is shallow: a const Expectation object itself cannot
+//     be modified, but the mutable methods of the ExpectationBase
+//     object it references can be called via expectation_base().
+
+class GTEST_API_ Expectation {
+ public:
+  // Constructs a null object that doesn't reference any expectation.
+  Expectation();
+  Expectation(Expectation&&) = default;
+  Expectation(const Expectation&) = default;
+  Expectation& operator=(Expectation&&) = default;
+  Expectation& operator=(const Expectation&) = default;
+  ~Expectation();
+
+  // This single-argument ctor must not be explicit, in order to support the
+  //   Expectation e = EXPECT_CALL(...);
+  // syntax.
+  //
+  // A TypedExpectation object stores its pre-requisites as
+  // Expectation objects, and needs to call the non-const Retire()
+  // method on the ExpectationBase objects they reference.  Therefore
+  // Expectation must receive a *non-const* reference to the
+  // ExpectationBase object.
+  Expectation(internal::ExpectationBase& exp);  // NOLINT
+
+  // The compiler-generated copy ctor and operator= work exactly as
+  // intended, so we don't need to define our own.
+
+  // Returns true if and only if rhs references the same expectation as this
+  // object does.
+  bool operator==(const Expectation& rhs) const {
+    return expectation_base_ == rhs.expectation_base_;
+  }
+
+  bool operator!=(const Expectation& rhs) const { return !(*this == rhs); }
+
+ private:
+  friend class ExpectationSet;
+  friend class Sequence;
+  friend class ::testing::internal::ExpectationBase;
+  friend class ::testing::internal::UntypedFunctionMockerBase;
+
+  template <typename F>
+  friend class ::testing::internal::FunctionMocker;
+
+  template <typename F>
+  friend class ::testing::internal::TypedExpectation;
+
+  // This comparator is needed for putting Expectation objects into a set.
+  class Less {
+   public:
+    bool operator()(const Expectation& lhs, const Expectation& rhs) const {
+      return lhs.expectation_base_.get() < rhs.expectation_base_.get();
+    }
+  };
+
+  typedef ::std::set<Expectation, Less> Set;
+
+  Expectation(
+      const std::shared_ptr<internal::ExpectationBase>& expectation_base);
+
+  // Returns the expectation this object references.
+  const std::shared_ptr<internal::ExpectationBase>& expectation_base() const {
+    return expectation_base_;
+  }
+
+  // A shared_ptr that co-owns the expectation this handle references.
+  std::shared_ptr<internal::ExpectationBase> expectation_base_;
+};
+
+// A set of expectation handles.  Useful in the .After() clause of
+// EXPECT_CALL() for setting the (partial) order of expectations.  The
+// syntax:
+//
+//   ExpectationSet es;
+//   es += EXPECT_CALL(...)...;
+//   es += EXPECT_CALL(...)...;
+//   EXPECT_CALL(...).After(es)...;
+//
+// sets three expectations where the last one can only be matched
+// after the first two have both been satisfied.
+//
+// This class is copyable and has value semantics.
+class ExpectationSet {
+ public:
+  // A bidirectional iterator that can read a const element in the set.
+  typedef Expectation::Set::const_iterator const_iterator;
+
+  // An object stored in the set.  This is an alias of Expectation.
+  typedef Expectation::Set::value_type value_type;
+
+  // Constructs an empty set.
+  ExpectationSet() {}
+
+  // This single-argument ctor must not be explicit, in order to support the
+  //   ExpectationSet es = EXPECT_CALL(...);
+  // syntax.
+  ExpectationSet(internal::ExpectationBase& exp) {  // NOLINT
+    *this += Expectation(exp);
+  }
+
+  // This single-argument ctor implements implicit conversion from
+  // Expectation and thus must not be explicit.  This allows either an
+  // Expectation or an ExpectationSet to be used in .After().
+  ExpectationSet(const Expectation& e) {  // NOLINT
+    *this += e;
+  }
+
+  // The compiler-generator ctor and operator= works exactly as
+  // intended, so we don't need to define our own.
+
+  // Returns true if and only if rhs contains the same set of Expectation
+  // objects as this does.
+  bool operator==(const ExpectationSet& rhs) const {
+    return expectations_ == rhs.expectations_;
+  }
+
+  bool operator!=(const ExpectationSet& rhs) const { return !(*this == rhs); }
+
+  // Implements the syntax
+  //   expectation_set += EXPECT_CALL(...);
+  ExpectationSet& operator+=(const Expectation& e) {
+    expectations_.insert(e);
+    return *this;
+  }
+
+  int size() const { return static_cast<int>(expectations_.size()); }
+
+  const_iterator begin() const { return expectations_.begin(); }
+  const_iterator end() const { return expectations_.end(); }
+
+ private:
+  Expectation::Set expectations_;
+};
+
+
+// Sequence objects are used by a user to specify the relative order
+// in which the expectations should match.  They are copyable (we rely
+// on the compiler-defined copy constructor and assignment operator).
+class GTEST_API_ Sequence {
+ public:
+  // Constructs an empty sequence.
+  Sequence() : last_expectation_(new Expectation) {}
+
+  // Adds an expectation to this sequence.  The caller must ensure
+  // that no other thread is accessing this Sequence object.
+  void AddExpectation(const Expectation& expectation) const;
+
+ private:
+  // The last expectation in this sequence.
+  std::shared_ptr<Expectation> last_expectation_;
+};  // class Sequence
+
+// An object of this type causes all EXPECT_CALL() statements
+// encountered in its scope to be put in an anonymous sequence.  The
+// work is done in the constructor and destructor.  You should only
+// create an InSequence object on the stack.
+//
+// The sole purpose for this class is to support easy definition of
+// sequential expectations, e.g.
+//
+//   {
+//     InSequence dummy;  // The name of the object doesn't matter.
+//
+//     // The following expectations must match in the order they appear.
+//     EXPECT_CALL(a, Bar())...;
+//     EXPECT_CALL(a, Baz())...;
+//     ...
+//     EXPECT_CALL(b, Xyz())...;
+//   }
+//
+// You can create InSequence objects in multiple threads, as long as
+// they are used to affect different mock objects.  The idea is that
+// each thread can create and set up its own mocks as if it's the only
+// thread.  However, for clarity of your tests we recommend you to set
+// up mocks in the main thread unless you have a good reason not to do
+// so.
+class GTEST_API_ InSequence {
+ public:
+  InSequence();
+  ~InSequence();
+ private:
+  bool sequence_created_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(InSequence);  // NOLINT
+} GTEST_ATTRIBUTE_UNUSED_;
+
+namespace internal {
+
+// Points to the implicit sequence introduced by a living InSequence
+// object (if any) in the current thread or NULL.
+GTEST_API_ extern ThreadLocal<Sequence*> g_gmock_implicit_sequence;
+
+// Base class for implementing expectations.
+//
+// There are two reasons for having a type-agnostic base class for
+// Expectation:
+//
+//   1. We need to store collections of expectations of different
+//   types (e.g. all pre-requisites of a particular expectation, all
+//   expectations in a sequence).  Therefore these expectation objects
+//   must share a common base class.
+//
+//   2. We can avoid binary code bloat by moving methods not depending
+//   on the template argument of Expectation to the base class.
+//
+// This class is internal and mustn't be used by user code directly.
+class GTEST_API_ ExpectationBase {
+ public:
+  // source_text is the EXPECT_CALL(...) source that created this Expectation.
+  ExpectationBase(const char* file, int line, const std::string& source_text);
+
+  virtual ~ExpectationBase();
+
+  // Where in the source file was the expectation spec defined?
+  const char* file() const { return file_; }
+  int line() const { return line_; }
+  const char* source_text() const { return source_text_.c_str(); }
+  // Returns the cardinality specified in the expectation spec.
+  const Cardinality& cardinality() const { return cardinality_; }
+
+  // Describes the source file location of this expectation.
+  void DescribeLocationTo(::std::ostream* os) const {
+    *os << FormatFileLocation(file(), line()) << " ";
+  }
+
+  // Describes how many times a function call matching this
+  // expectation has occurred.
+  void DescribeCallCountTo(::std::ostream* os) const
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
+
+  // If this mock method has an extra matcher (i.e. .With(matcher)),
+  // describes it to the ostream.
+  virtual void MaybeDescribeExtraMatcherTo(::std::ostream* os) = 0;
+
+ protected:
+  friend class ::testing::Expectation;
+  friend class UntypedFunctionMockerBase;
+
+  enum Clause {
+    // Don't change the order of the enum members!
+    kNone,
+    kWith,
+    kTimes,
+    kInSequence,
+    kAfter,
+    kWillOnce,
+    kWillRepeatedly,
+    kRetiresOnSaturation
+  };
+
+  typedef std::vector<const void*> UntypedActions;
+
+  // Returns an Expectation object that references and co-owns this
+  // expectation.
+  virtual Expectation GetHandle() = 0;
+
+  // Asserts that the EXPECT_CALL() statement has the given property.
+  void AssertSpecProperty(bool property,
+                          const std::string& failure_message) const {
+    Assert(property, file_, line_, failure_message);
+  }
+
+  // Expects that the EXPECT_CALL() statement has the given property.
+  void ExpectSpecProperty(bool property,
+                          const std::string& failure_message) const {
+    Expect(property, file_, line_, failure_message);
+  }
+
+  // Explicitly specifies the cardinality of this expectation.  Used
+  // by the subclasses to implement the .Times() clause.
+  void SpecifyCardinality(const Cardinality& cardinality);
+
+  // Returns true if and only if the user specified the cardinality
+  // explicitly using a .Times().
+  bool cardinality_specified() const { return cardinality_specified_; }
+
+  // Sets the cardinality of this expectation spec.
+  void set_cardinality(const Cardinality& a_cardinality) {
+    cardinality_ = a_cardinality;
+  }
+
+  // The following group of methods should only be called after the
+  // EXPECT_CALL() statement, and only when g_gmock_mutex is held by
+  // the current thread.
+
+  // Retires all pre-requisites of this expectation.
+  void RetireAllPreRequisites()
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
+
+  // Returns true if and only if this expectation is retired.
+  bool is_retired() const
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+    return retired_;
+  }
+
+  // Retires this expectation.
+  void Retire()
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+    retired_ = true;
+  }
+
+  // Returns true if and only if this expectation is satisfied.
+  bool IsSatisfied() const
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+    return cardinality().IsSatisfiedByCallCount(call_count_);
+  }
+
+  // Returns true if and only if this expectation is saturated.
+  bool IsSaturated() const
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+    return cardinality().IsSaturatedByCallCount(call_count_);
+  }
+
+  // Returns true if and only if this expectation is over-saturated.
+  bool IsOverSaturated() const
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+    return cardinality().IsOverSaturatedByCallCount(call_count_);
+  }
+
+  // Returns true if and only if all pre-requisites of this expectation are
+  // satisfied.
+  bool AllPrerequisitesAreSatisfied() const
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
+
+  // Adds unsatisfied pre-requisites of this expectation to 'result'.
+  void FindUnsatisfiedPrerequisites(ExpectationSet* result) const
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
+
+  // Returns the number this expectation has been invoked.
+  int call_count() const
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+    return call_count_;
+  }
+
+  // Increments the number this expectation has been invoked.
+  void IncrementCallCount()
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+    call_count_++;
+  }
+
+  // Checks the action count (i.e. the number of WillOnce() and
+  // WillRepeatedly() clauses) against the cardinality if this hasn't
+  // been done before.  Prints a warning if there are too many or too
+  // few actions.
+  void CheckActionCountIfNotDone() const
+      GTEST_LOCK_EXCLUDED_(mutex_);
+
+  friend class ::testing::Sequence;
+  friend class ::testing::internal::ExpectationTester;
+
+  template <typename Function>
+  friend class TypedExpectation;
+
+  // Implements the .Times() clause.
+  void UntypedTimes(const Cardinality& a_cardinality);
+
+  // This group of fields are part of the spec and won't change after
+  // an EXPECT_CALL() statement finishes.
+  const char* file_;          // The file that contains the expectation.
+  int line_;                  // The line number of the expectation.
+  const std::string source_text_;  // The EXPECT_CALL(...) source text.
+  // True if and only if the cardinality is specified explicitly.
+  bool cardinality_specified_;
+  Cardinality cardinality_;            // The cardinality of the expectation.
+  // The immediate pre-requisites (i.e. expectations that must be
+  // satisfied before this expectation can be matched) of this
+  // expectation.  We use std::shared_ptr in the set because we want an
+  // Expectation object to be co-owned by its FunctionMocker and its
+  // successors.  This allows multiple mock objects to be deleted at
+  // different times.
+  ExpectationSet immediate_prerequisites_;
+
+  // This group of fields are the current state of the expectation,
+  // and can change as the mock function is called.
+  int call_count_;  // How many times this expectation has been invoked.
+  bool retired_;    // True if and only if this expectation has retired.
+  UntypedActions untyped_actions_;
+  bool extra_matcher_specified_;
+  bool repeated_action_specified_;  // True if a WillRepeatedly() was specified.
+  bool retires_on_saturation_;
+  Clause last_clause_;
+  mutable bool action_count_checked_;  // Under mutex_.
+  mutable Mutex mutex_;  // Protects action_count_checked_.
+};  // class ExpectationBase
+
+// Impements an expectation for the given function type.
+template <typename F>
+class TypedExpectation : public ExpectationBase {
+ public:
+  typedef typename Function<F>::ArgumentTuple ArgumentTuple;
+  typedef typename Function<F>::ArgumentMatcherTuple ArgumentMatcherTuple;
+  typedef typename Function<F>::Result Result;
+
+  TypedExpectation(FunctionMocker<F>* owner, const char* a_file, int a_line,
+                   const std::string& a_source_text,
+                   const ArgumentMatcherTuple& m)
+      : ExpectationBase(a_file, a_line, a_source_text),
+        owner_(owner),
+        matchers_(m),
+        // By default, extra_matcher_ should match anything.  However,
+        // we cannot initialize it with _ as that causes ambiguity between
+        // Matcher's copy and move constructor for some argument types.
+        extra_matcher_(A<const ArgumentTuple&>()),
+        repeated_action_(DoDefault()) {}
+
+  ~TypedExpectation() override {
+    // Check the validity of the action count if it hasn't been done
+    // yet (for example, if the expectation was never used).
+    CheckActionCountIfNotDone();
+    for (UntypedActions::const_iterator it = untyped_actions_.begin();
+         it != untyped_actions_.end(); ++it) {
+      delete static_cast<const Action<F>*>(*it);
+    }
+  }
+
+  // Implements the .With() clause.
+  TypedExpectation& With(const Matcher<const ArgumentTuple&>& m) {
+    if (last_clause_ == kWith) {
+      ExpectSpecProperty(false,
+                         ".With() cannot appear "
+                         "more than once in an EXPECT_CALL().");
+    } else {
+      ExpectSpecProperty(last_clause_ < kWith,
+                         ".With() must be the first "
+                         "clause in an EXPECT_CALL().");
+    }
+    last_clause_ = kWith;
+
+    extra_matcher_ = m;
+    extra_matcher_specified_ = true;
+    return *this;
+  }
+
+  // Implements the .Times() clause.
+  TypedExpectation& Times(const Cardinality& a_cardinality) {
+    ExpectationBase::UntypedTimes(a_cardinality);
+    return *this;
+  }
+
+  // Implements the .Times() clause.
+  TypedExpectation& Times(int n) {
+    return Times(Exactly(n));
+  }
+
+  // Implements the .InSequence() clause.
+  TypedExpectation& InSequence(const Sequence& s) {
+    ExpectSpecProperty(last_clause_ <= kInSequence,
+                       ".InSequence() cannot appear after .After(),"
+                       " .WillOnce(), .WillRepeatedly(), or "
+                       ".RetiresOnSaturation().");
+    last_clause_ = kInSequence;
+
+    s.AddExpectation(GetHandle());
+    return *this;
+  }
+  TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2) {
+    return InSequence(s1).InSequence(s2);
+  }
+  TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2,
+                               const Sequence& s3) {
+    return InSequence(s1, s2).InSequence(s3);
+  }
+  TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2,
+                               const Sequence& s3, const Sequence& s4) {
+    return InSequence(s1, s2, s3).InSequence(s4);
+  }
+  TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2,
+                               const Sequence& s3, const Sequence& s4,
+                               const Sequence& s5) {
+    return InSequence(s1, s2, s3, s4).InSequence(s5);
+  }
+
+  // Implements that .After() clause.
+  TypedExpectation& After(const ExpectationSet& s) {
+    ExpectSpecProperty(last_clause_ <= kAfter,
+                       ".After() cannot appear after .WillOnce(),"
+                       " .WillRepeatedly(), or "
+                       ".RetiresOnSaturation().");
+    last_clause_ = kAfter;
+
+    for (ExpectationSet::const_iterator it = s.begin(); it != s.end(); ++it) {
+      immediate_prerequisites_ += *it;
+    }
+    return *this;
+  }
+  TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2) {
+    return After(s1).After(s2);
+  }
+  TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2,
+                          const ExpectationSet& s3) {
+    return After(s1, s2).After(s3);
+  }
+  TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2,
+                          const ExpectationSet& s3, const ExpectationSet& s4) {
+    return After(s1, s2, s3).After(s4);
+  }
+  TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2,
+                          const ExpectationSet& s3, const ExpectationSet& s4,
+                          const ExpectationSet& s5) {
+    return After(s1, s2, s3, s4).After(s5);
+  }
+
+  // Implements the .WillOnce() clause.
+  TypedExpectation& WillOnce(const Action<F>& action) {
+    ExpectSpecProperty(last_clause_ <= kWillOnce,
+                       ".WillOnce() cannot appear after "
+                       ".WillRepeatedly() or .RetiresOnSaturation().");
+    last_clause_ = kWillOnce;
+
+    untyped_actions_.push_back(new Action<F>(action));
+    if (!cardinality_specified()) {
+      set_cardinality(Exactly(static_cast<int>(untyped_actions_.size())));
+    }
+    return *this;
+  }
+
+  // Implements the .WillRepeatedly() clause.
+  TypedExpectation& WillRepeatedly(const Action<F>& action) {
+    if (last_clause_ == kWillRepeatedly) {
+      ExpectSpecProperty(false,
+                         ".WillRepeatedly() cannot appear "
+                         "more than once in an EXPECT_CALL().");
+    } else {
+      ExpectSpecProperty(last_clause_ < kWillRepeatedly,
+                         ".WillRepeatedly() cannot appear "
+                         "after .RetiresOnSaturation().");
+    }
+    last_clause_ = kWillRepeatedly;
+    repeated_action_specified_ = true;
+
+    repeated_action_ = action;
+    if (!cardinality_specified()) {
+      set_cardinality(AtLeast(static_cast<int>(untyped_actions_.size())));
+    }
+
+    // Now that no more action clauses can be specified, we check
+    // whether their count makes sense.
+    CheckActionCountIfNotDone();
+    return *this;
+  }
+
+  // Implements the .RetiresOnSaturation() clause.
+  TypedExpectation& RetiresOnSaturation() {
+    ExpectSpecProperty(last_clause_ < kRetiresOnSaturation,
+                       ".RetiresOnSaturation() cannot appear "
+                       "more than once.");
+    last_clause_ = kRetiresOnSaturation;
+    retires_on_saturation_ = true;
+
+    // Now that no more action clauses can be specified, we check
+    // whether their count makes sense.
+    CheckActionCountIfNotDone();
+    return *this;
+  }
+
+  // Returns the matchers for the arguments as specified inside the
+  // EXPECT_CALL() macro.
+  const ArgumentMatcherTuple& matchers() const {
+    return matchers_;
+  }
+
+  // Returns the matcher specified by the .With() clause.
+  const Matcher<const ArgumentTuple&>& extra_matcher() const {
+    return extra_matcher_;
+  }
+
+  // Returns the action specified by the .WillRepeatedly() clause.
+  const Action<F>& repeated_action() const { return repeated_action_; }
+
+  // If this mock method has an extra matcher (i.e. .With(matcher)),
+  // describes it to the ostream.
+  void MaybeDescribeExtraMatcherTo(::std::ostream* os) override {
+    if (extra_matcher_specified_) {
+      *os << "    Expected args: ";
+      extra_matcher_.DescribeTo(os);
+      *os << "\n";
+    }
+  }
+
+ private:
+  template <typename Function>
+  friend class FunctionMocker;
+
+  // Returns an Expectation object that references and co-owns this
+  // expectation.
+  Expectation GetHandle() override { return owner_->GetHandleOf(this); }
+
+  // The following methods will be called only after the EXPECT_CALL()
+  // statement finishes and when the current thread holds
+  // g_gmock_mutex.
+
+  // Returns true if and only if this expectation matches the given arguments.
+  bool Matches(const ArgumentTuple& args) const
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+    return TupleMatches(matchers_, args) && extra_matcher_.Matches(args);
+  }
+
+  // Returns true if and only if this expectation should handle the given
+  // arguments.
+  bool ShouldHandleArguments(const ArgumentTuple& args) const
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+
+    // In case the action count wasn't checked when the expectation
+    // was defined (e.g. if this expectation has no WillRepeatedly()
+    // or RetiresOnSaturation() clause), we check it when the
+    // expectation is used for the first time.
+    CheckActionCountIfNotDone();
+    return !is_retired() && AllPrerequisitesAreSatisfied() && Matches(args);
+  }
+
+  // Describes the result of matching the arguments against this
+  // expectation to the given ostream.
+  void ExplainMatchResultTo(
+      const ArgumentTuple& args,
+      ::std::ostream* os) const
+          GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+
+    if (is_retired()) {
+      *os << "         Expected: the expectation is active\n"
+          << "           Actual: it is retired\n";
+    } else if (!Matches(args)) {
+      if (!TupleMatches(matchers_, args)) {
+        ExplainMatchFailureTupleTo(matchers_, args, os);
+      }
+      StringMatchResultListener listener;
+      if (!extra_matcher_.MatchAndExplain(args, &listener)) {
+        *os << "    Expected args: ";
+        extra_matcher_.DescribeTo(os);
+        *os << "\n           Actual: don't match";
+
+        internal::PrintIfNotEmpty(listener.str(), os);
+        *os << "\n";
+      }
+    } else if (!AllPrerequisitesAreSatisfied()) {
+      *os << "         Expected: all pre-requisites are satisfied\n"
+          << "           Actual: the following immediate pre-requisites "
+          << "are not satisfied:\n";
+      ExpectationSet unsatisfied_prereqs;
+      FindUnsatisfiedPrerequisites(&unsatisfied_prereqs);
+      int i = 0;
+      for (ExpectationSet::const_iterator it = unsatisfied_prereqs.begin();
+           it != unsatisfied_prereqs.end(); ++it) {
+        it->expectation_base()->DescribeLocationTo(os);
+        *os << "pre-requisite #" << i++ << "\n";
+      }
+      *os << "                   (end of pre-requisites)\n";
+    } else {
+      // This line is here just for completeness' sake.  It will never
+      // be executed as currently the ExplainMatchResultTo() function
+      // is called only when the mock function call does NOT match the
+      // expectation.
+      *os << "The call matches the expectation.\n";
+    }
+  }
+
+  // Returns the action that should be taken for the current invocation.
+  const Action<F>& GetCurrentAction(const FunctionMocker<F>* mocker,
+                                    const ArgumentTuple& args) const
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+    const int count = call_count();
+    Assert(count >= 1, __FILE__, __LINE__,
+           "call_count() is <= 0 when GetCurrentAction() is "
+           "called - this should never happen.");
+
+    const int action_count = static_cast<int>(untyped_actions_.size());
+    if (action_count > 0 && !repeated_action_specified_ &&
+        count > action_count) {
+      // If there is at least one WillOnce() and no WillRepeatedly(),
+      // we warn the user when the WillOnce() clauses ran out.
+      ::std::stringstream ss;
+      DescribeLocationTo(&ss);
+      ss << "Actions ran out in " << source_text() << "...\n"
+         << "Called " << count << " times, but only "
+         << action_count << " WillOnce()"
+         << (action_count == 1 ? " is" : "s are") << " specified - ";
+      mocker->DescribeDefaultActionTo(args, &ss);
+      Log(kWarning, ss.str(), 1);
+    }
+
+    return count <= action_count
+               ? *static_cast<const Action<F>*>(
+                     untyped_actions_[static_cast<size_t>(count - 1)])
+               : repeated_action();
+  }
+
+  // Given the arguments of a mock function call, if the call will
+  // over-saturate this expectation, returns the default action;
+  // otherwise, returns the next action in this expectation.  Also
+  // describes *what* happened to 'what', and explains *why* Google
+  // Mock does it to 'why'.  This method is not const as it calls
+  // IncrementCallCount().  A return value of NULL means the default
+  // action.
+  const Action<F>* GetActionForArguments(const FunctionMocker<F>* mocker,
+                                         const ArgumentTuple& args,
+                                         ::std::ostream* what,
+                                         ::std::ostream* why)
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+    if (IsSaturated()) {
+      // We have an excessive call.
+      IncrementCallCount();
+      *what << "Mock function called more times than expected - ";
+      mocker->DescribeDefaultActionTo(args, what);
+      DescribeCallCountTo(why);
+
+      return nullptr;
+    }
+
+    IncrementCallCount();
+    RetireAllPreRequisites();
+
+    if (retires_on_saturation_ && IsSaturated()) {
+      Retire();
+    }
+
+    // Must be done after IncrementCount()!
+    *what << "Mock function call matches " << source_text() <<"...\n";
+    return &(GetCurrentAction(mocker, args));
+  }
+
+  // All the fields below won't change once the EXPECT_CALL()
+  // statement finishes.
+  FunctionMocker<F>* const owner_;
+  ArgumentMatcherTuple matchers_;
+  Matcher<const ArgumentTuple&> extra_matcher_;
+  Action<F> repeated_action_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(TypedExpectation);
+};  // class TypedExpectation
+
+// A MockSpec object is used by ON_CALL() or EXPECT_CALL() for
+// specifying the default behavior of, or expectation on, a mock
+// function.
+
+// Note: class MockSpec really belongs to the ::testing namespace.
+// However if we define it in ::testing, MSVC will complain when
+// classes in ::testing::internal declare it as a friend class
+// template.  To workaround this compiler bug, we define MockSpec in
+// ::testing::internal and import it into ::testing.
+
+// Logs a message including file and line number information.
+GTEST_API_ void LogWithLocation(testing::internal::LogSeverity severity,
+                                const char* file, int line,
+                                const std::string& message);
+
+template <typename F>
+class MockSpec {
+ public:
+  typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
+  typedef typename internal::Function<F>::ArgumentMatcherTuple
+      ArgumentMatcherTuple;
+
+  // Constructs a MockSpec object, given the function mocker object
+  // that the spec is associated with.
+  MockSpec(internal::FunctionMocker<F>* function_mocker,
+           const ArgumentMatcherTuple& matchers)
+      : function_mocker_(function_mocker), matchers_(matchers) {}
+
+  // Adds a new default action spec to the function mocker and returns
+  // the newly created spec.
+  internal::OnCallSpec<F>& InternalDefaultActionSetAt(
+      const char* file, int line, const char* obj, const char* call) {
+    LogWithLocation(internal::kInfo, file, line,
+                    std::string("ON_CALL(") + obj + ", " + call + ") invoked");
+    return function_mocker_->AddNewOnCallSpec(file, line, matchers_);
+  }
+
+  // Adds a new expectation spec to the function mocker and returns
+  // the newly created spec.
+  internal::TypedExpectation<F>& InternalExpectedAt(
+      const char* file, int line, const char* obj, const char* call) {
+    const std::string source_text(std::string("EXPECT_CALL(") + obj + ", " +
+                                  call + ")");
+    LogWithLocation(internal::kInfo, file, line, source_text + " invoked");
+    return function_mocker_->AddNewExpectation(
+        file, line, source_text, matchers_);
+  }
+
+  // This operator overload is used to swallow the superfluous parameter list
+  // introduced by the ON/EXPECT_CALL macros. See the macro comments for more
+  // explanation.
+  MockSpec<F>& operator()(const internal::WithoutMatchers&, void* const) {
+    return *this;
+  }
+
+ private:
+  template <typename Function>
+  friend class internal::FunctionMocker;
+
+  // The function mocker that owns this spec.
+  internal::FunctionMocker<F>* const function_mocker_;
+  // The argument matchers specified in the spec.
+  ArgumentMatcherTuple matchers_;
+};  // class MockSpec
+
+// Wrapper type for generically holding an ordinary value or lvalue reference.
+// If T is not a reference type, it must be copyable or movable.
+// ReferenceOrValueWrapper<T> is movable, and will also be copyable unless
+// T is a move-only value type (which means that it will always be copyable
+// if the current platform does not support move semantics).
+//
+// The primary template defines handling for values, but function header
+// comments describe the contract for the whole template (including
+// specializations).
+template <typename T>
+class ReferenceOrValueWrapper {
+ public:
+  // Constructs a wrapper from the given value/reference.
+  explicit ReferenceOrValueWrapper(T value)
+      : value_(std::move(value)) {
+  }
+
+  // Unwraps and returns the underlying value/reference, exactly as
+  // originally passed. The behavior of calling this more than once on
+  // the same object is unspecified.
+  T Unwrap() { return std::move(value_); }
+
+  // Provides nondestructive access to the underlying value/reference.
+  // Always returns a const reference (more precisely,
+  // const std::add_lvalue_reference<T>::type). The behavior of calling this
+  // after calling Unwrap on the same object is unspecified.
+  const T& Peek() const {
+    return value_;
+  }
+
+ private:
+  T value_;
+};
+
+// Specialization for lvalue reference types. See primary template
+// for documentation.
+template <typename T>
+class ReferenceOrValueWrapper<T&> {
+ public:
+  // Workaround for debatable pass-by-reference lint warning (c-library-team
+  // policy precludes NOLINT in this context)
+  typedef T& reference;
+  explicit ReferenceOrValueWrapper(reference ref)
+      : value_ptr_(&ref) {}
+  T& Unwrap() { return *value_ptr_; }
+  const T& Peek() const { return *value_ptr_; }
+
+ private:
+  T* value_ptr_;
+};
+
+// C++ treats the void type specially.  For example, you cannot define
+// a void-typed variable or pass a void value to a function.
+// ActionResultHolder<T> holds a value of type T, where T must be a
+// copyable type or void (T doesn't need to be default-constructable).
+// It hides the syntactic difference between void and other types, and
+// is used to unify the code for invoking both void-returning and
+// non-void-returning mock functions.
+
+// Untyped base class for ActionResultHolder<T>.
+class UntypedActionResultHolderBase {
+ public:
+  virtual ~UntypedActionResultHolderBase() {}
+
+  // Prints the held value as an action's result to os.
+  virtual void PrintAsActionResult(::std::ostream* os) const = 0;
+};
+
+// This generic definition is used when T is not void.
+template <typename T>
+class ActionResultHolder : public UntypedActionResultHolderBase {
+ public:
+  // Returns the held value. Must not be called more than once.
+  T Unwrap() {
+    return result_.Unwrap();
+  }
+
+  // Prints the held value as an action's result to os.
+  void PrintAsActionResult(::std::ostream* os) const override {
+    *os << "\n          Returns: ";
+    // T may be a reference type, so we don't use UniversalPrint().
+    UniversalPrinter<T>::Print(result_.Peek(), os);
+  }
+
+  // Performs the given mock function's default action and returns the
+  // result in a new-ed ActionResultHolder.
+  template <typename F>
+  static ActionResultHolder* PerformDefaultAction(
+      const FunctionMocker<F>* func_mocker,
+      typename Function<F>::ArgumentTuple&& args,
+      const std::string& call_description) {
+    return new ActionResultHolder(Wrapper(func_mocker->PerformDefaultAction(
+        std::move(args), call_description)));
+  }
+
+  // Performs the given action and returns the result in a new-ed
+  // ActionResultHolder.
+  template <typename F>
+  static ActionResultHolder* PerformAction(
+      const Action<F>& action, typename Function<F>::ArgumentTuple&& args) {
+    return new ActionResultHolder(
+        Wrapper(action.Perform(std::move(args))));
+  }
+
+ private:
+  typedef ReferenceOrValueWrapper<T> Wrapper;
+
+  explicit ActionResultHolder(Wrapper result)
+      : result_(std::move(result)) {
+  }
+
+  Wrapper result_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ActionResultHolder);
+};
+
+// Specialization for T = void.
+template <>
+class ActionResultHolder<void> : public UntypedActionResultHolderBase {
+ public:
+  void Unwrap() { }
+
+  void PrintAsActionResult(::std::ostream* /* os */) const override {}
+
+  // Performs the given mock function's default action and returns ownership
+  // of an empty ActionResultHolder*.
+  template <typename F>
+  static ActionResultHolder* PerformDefaultAction(
+      const FunctionMocker<F>* func_mocker,
+      typename Function<F>::ArgumentTuple&& args,
+      const std::string& call_description) {
+    func_mocker->PerformDefaultAction(std::move(args), call_description);
+    return new ActionResultHolder;
+  }
+
+  // Performs the given action and returns ownership of an empty
+  // ActionResultHolder*.
+  template <typename F>
+  static ActionResultHolder* PerformAction(
+      const Action<F>& action, typename Function<F>::ArgumentTuple&& args) {
+    action.Perform(std::move(args));
+    return new ActionResultHolder;
+  }
+
+ private:
+  ActionResultHolder() {}
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ActionResultHolder);
+};
+
+template <typename F>
+class FunctionMocker;
+
+template <typename R, typename... Args>
+class FunctionMocker<R(Args...)> final : public UntypedFunctionMockerBase {
+  using F = R(Args...);
+
+ public:
+  using Result = R;
+  using ArgumentTuple = std::tuple<Args...>;
+  using ArgumentMatcherTuple = std::tuple<Matcher<Args>...>;
+
+  FunctionMocker() {}
+
+  // There is no generally useful and implementable semantics of
+  // copying a mock object, so copying a mock is usually a user error.
+  // Thus we disallow copying function mockers.  If the user really
+  // wants to copy a mock object, they should implement their own copy
+  // operation, for example:
+  //
+  //   class MockFoo : public Foo {
+  //    public:
+  //     // Defines a copy constructor explicitly.
+  //     MockFoo(const MockFoo& src) {}
+  //     ...
+  //   };
+  FunctionMocker(const FunctionMocker&) = delete;
+  FunctionMocker& operator=(const FunctionMocker&) = delete;
+
+  // The destructor verifies that all expectations on this mock
+  // function have been satisfied.  If not, it will report Google Test
+  // non-fatal failures for the violations.
+  ~FunctionMocker() override GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
+    MutexLock l(&g_gmock_mutex);
+    VerifyAndClearExpectationsLocked();
+    Mock::UnregisterLocked(this);
+    ClearDefaultActionsLocked();
+  }
+
+  // Returns the ON_CALL spec that matches this mock function with the
+  // given arguments; returns NULL if no matching ON_CALL is found.
+  // L = *
+  const OnCallSpec<F>* FindOnCallSpec(
+      const ArgumentTuple& args) const {
+    for (UntypedOnCallSpecs::const_reverse_iterator it
+             = untyped_on_call_specs_.rbegin();
+         it != untyped_on_call_specs_.rend(); ++it) {
+      const OnCallSpec<F>* spec = static_cast<const OnCallSpec<F>*>(*it);
+      if (spec->Matches(args))
+        return spec;
+    }
+
+    return nullptr;
+  }
+
+  // Performs the default action of this mock function on the given
+  // arguments and returns the result. Asserts (or throws if
+  // exceptions are enabled) with a helpful call descrption if there
+  // is no valid return value. This method doesn't depend on the
+  // mutable state of this object, and thus can be called concurrently
+  // without locking.
+  // L = *
+  Result PerformDefaultAction(ArgumentTuple&& args,
+                              const std::string& call_description) const {
+    const OnCallSpec<F>* const spec =
+        this->FindOnCallSpec(args);
+    if (spec != nullptr) {
+      return spec->GetAction().Perform(std::move(args));
+    }
+    const std::string message =
+        call_description +
+        "\n    The mock function has no default action "
+        "set, and its return type has no default value set.";
+#if GTEST_HAS_EXCEPTIONS
+    if (!DefaultValue<Result>::Exists()) {
+      throw std::runtime_error(message);
+    }
+#else
+    Assert(DefaultValue<Result>::Exists(), "", -1, message);
+#endif
+    return DefaultValue<Result>::Get();
+  }
+
+  // Performs the default action with the given arguments and returns
+  // the action's result.  The call description string will be used in
+  // the error message to describe the call in the case the default
+  // action fails.  The caller is responsible for deleting the result.
+  // L = *
+  UntypedActionResultHolderBase* UntypedPerformDefaultAction(
+      void* untyped_args,  // must point to an ArgumentTuple
+      const std::string& call_description) const override {
+    ArgumentTuple* args = static_cast<ArgumentTuple*>(untyped_args);
+    return ResultHolder::PerformDefaultAction(this, std::move(*args),
+                                              call_description);
+  }
+
+  // Performs the given action with the given arguments and returns
+  // the action's result.  The caller is responsible for deleting the
+  // result.
+  // L = *
+  UntypedActionResultHolderBase* UntypedPerformAction(
+      const void* untyped_action, void* untyped_args) const override {
+    // Make a copy of the action before performing it, in case the
+    // action deletes the mock object (and thus deletes itself).
+    const Action<F> action = *static_cast<const Action<F>*>(untyped_action);
+    ArgumentTuple* args = static_cast<ArgumentTuple*>(untyped_args);
+    return ResultHolder::PerformAction(action, std::move(*args));
+  }
+
+  // Implements UntypedFunctionMockerBase::ClearDefaultActionsLocked():
+  // clears the ON_CALL()s set on this mock function.
+  void ClearDefaultActionsLocked() override
+      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+
+    // Deleting our default actions may trigger other mock objects to be
+    // deleted, for example if an action contains a reference counted smart
+    // pointer to that mock object, and that is the last reference. So if we
+    // delete our actions within the context of the global mutex we may deadlock
+    // when this method is called again. Instead, make a copy of the set of
+    // actions to delete, clear our set within the mutex, and then delete the
+    // actions outside of the mutex.
+    UntypedOnCallSpecs specs_to_delete;
+    untyped_on_call_specs_.swap(specs_to_delete);
+
+    g_gmock_mutex.Unlock();
+    for (UntypedOnCallSpecs::const_iterator it =
+             specs_to_delete.begin();
+         it != specs_to_delete.end(); ++it) {
+      delete static_cast<const OnCallSpec<F>*>(*it);
+    }
+
+    // Lock the mutex again, since the caller expects it to be locked when we
+    // return.
+    g_gmock_mutex.Lock();
+  }
+
+  // Returns the result of invoking this mock function with the given
+  // arguments.  This function can be safely called from multiple
+  // threads concurrently.
+  Result Invoke(Args... args) GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
+    ArgumentTuple tuple(std::forward<Args>(args)...);
+    std::unique_ptr<ResultHolder> holder(DownCast_<ResultHolder*>(
+        this->UntypedInvokeWith(static_cast<void*>(&tuple))));
+    return holder->Unwrap();
+  }
+
+  MockSpec<F> With(Matcher<Args>... m) {
+    return MockSpec<F>(this, ::std::make_tuple(std::move(m)...));
+  }
+
+ protected:
+  template <typename Function>
+  friend class MockSpec;
+
+  typedef ActionResultHolder<Result> ResultHolder;
+
+  // Adds and returns a default action spec for this mock function.
+  OnCallSpec<F>& AddNewOnCallSpec(
+      const char* file, int line,
+      const ArgumentMatcherTuple& m)
+          GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
+    Mock::RegisterUseByOnCallOrExpectCall(MockObject(), file, line);
+    OnCallSpec<F>* const on_call_spec = new OnCallSpec<F>(file, line, m);
+    untyped_on_call_specs_.push_back(on_call_spec);
+    return *on_call_spec;
+  }
+
+  // Adds and returns an expectation spec for this mock function.
+  TypedExpectation<F>& AddNewExpectation(const char* file, int line,
+                                         const std::string& source_text,
+                                         const ArgumentMatcherTuple& m)
+      GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
+    Mock::RegisterUseByOnCallOrExpectCall(MockObject(), file, line);
+    TypedExpectation<F>* const expectation =
+        new TypedExpectation<F>(this, file, line, source_text, m);
+    const std::shared_ptr<ExpectationBase> untyped_expectation(expectation);
+    // See the definition of untyped_expectations_ for why access to
+    // it is unprotected here.
+    untyped_expectations_.push_back(untyped_expectation);
+
+    // Adds this expectation into the implicit sequence if there is one.
+    Sequence* const implicit_sequence = g_gmock_implicit_sequence.get();
+    if (implicit_sequence != nullptr) {
+      implicit_sequence->AddExpectation(Expectation(untyped_expectation));
+    }
+
+    return *expectation;
+  }
+
+ private:
+  template <typename Func> friend class TypedExpectation;
+
+  // Some utilities needed for implementing UntypedInvokeWith().
+
+  // Describes what default action will be performed for the given
+  // arguments.
+  // L = *
+  void DescribeDefaultActionTo(const ArgumentTuple& args,
+                               ::std::ostream* os) const {
+    const OnCallSpec<F>* const spec = FindOnCallSpec(args);
+
+    if (spec == nullptr) {
+      *os << (std::is_void<Result>::value ? "returning directly.\n"
+                                          : "returning default value.\n");
+    } else {
+      *os << "taking default action specified at:\n"
+          << FormatFileLocation(spec->file(), spec->line()) << "\n";
+    }
+  }
+
+  // Writes a message that the call is uninteresting (i.e. neither
+  // explicitly expected nor explicitly unexpected) to the given
+  // ostream.
+  void UntypedDescribeUninterestingCall(const void* untyped_args,
+                                        ::std::ostream* os) const override
+      GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
+    const ArgumentTuple& args =
+        *static_cast<const ArgumentTuple*>(untyped_args);
+    *os << "Uninteresting mock function call - ";
+    DescribeDefaultActionTo(args, os);
+    *os << "    Function call: " << Name();
+    UniversalPrint(args, os);
+  }
+
+  // Returns the expectation that matches the given function arguments
+  // (or NULL is there's no match); when a match is found,
+  // untyped_action is set to point to the action that should be
+  // performed (or NULL if the action is "do default"), and
+  // is_excessive is modified to indicate whether the call exceeds the
+  // expected number.
+  //
+  // Critical section: We must find the matching expectation and the
+  // corresponding action that needs to be taken in an ATOMIC
+  // transaction.  Otherwise another thread may call this mock
+  // method in the middle and mess up the state.
+  //
+  // However, performing the action has to be left out of the critical
+  // section.  The reason is that we have no control on what the
+  // action does (it can invoke an arbitrary user function or even a
+  // mock function) and excessive locking could cause a dead lock.
+  const ExpectationBase* UntypedFindMatchingExpectation(
+      const void* untyped_args, const void** untyped_action, bool* is_excessive,
+      ::std::ostream* what, ::std::ostream* why) override
+      GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
+    const ArgumentTuple& args =
+        *static_cast<const ArgumentTuple*>(untyped_args);
+    MutexLock l(&g_gmock_mutex);
+    TypedExpectation<F>* exp = this->FindMatchingExpectationLocked(args);
+    if (exp == nullptr) {  // A match wasn't found.
+      this->FormatUnexpectedCallMessageLocked(args, what, why);
+      return nullptr;
+    }
+
+    // This line must be done before calling GetActionForArguments(),
+    // which will increment the call count for *exp and thus affect
+    // its saturation status.
+    *is_excessive = exp->IsSaturated();
+    const Action<F>* action = exp->GetActionForArguments(this, args, what, why);
+    if (action != nullptr && action->IsDoDefault())
+      action = nullptr;  // Normalize "do default" to NULL.
+    *untyped_action = action;
+    return exp;
+  }
+
+  // Prints the given function arguments to the ostream.
+  void UntypedPrintArgs(const void* untyped_args,
+                        ::std::ostream* os) const override {
+    const ArgumentTuple& args =
+        *static_cast<const ArgumentTuple*>(untyped_args);
+    UniversalPrint(args, os);
+  }
+
+  // Returns the expectation that matches the arguments, or NULL if no
+  // expectation matches them.
+  TypedExpectation<F>* FindMatchingExpectationLocked(
+      const ArgumentTuple& args) const
+          GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+    // See the definition of untyped_expectations_ for why access to
+    // it is unprotected here.
+    for (typename UntypedExpectations::const_reverse_iterator it =
+             untyped_expectations_.rbegin();
+         it != untyped_expectations_.rend(); ++it) {
+      TypedExpectation<F>* const exp =
+          static_cast<TypedExpectation<F>*>(it->get());
+      if (exp->ShouldHandleArguments(args)) {
+        return exp;
+      }
+    }
+    return nullptr;
+  }
+
+  // Returns a message that the arguments don't match any expectation.
+  void FormatUnexpectedCallMessageLocked(
+      const ArgumentTuple& args,
+      ::std::ostream* os,
+      ::std::ostream* why) const
+          GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+    *os << "\nUnexpected mock function call - ";
+    DescribeDefaultActionTo(args, os);
+    PrintTriedExpectationsLocked(args, why);
+  }
+
+  // Prints a list of expectations that have been tried against the
+  // current mock function call.
+  void PrintTriedExpectationsLocked(
+      const ArgumentTuple& args,
+      ::std::ostream* why) const
+          GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
+    g_gmock_mutex.AssertHeld();
+    const size_t count = untyped_expectations_.size();
+    *why << "Google Mock tried the following " << count << " "
+         << (count == 1 ? "expectation, but it didn't match" :
+             "expectations, but none matched")
+         << ":\n";
+    for (size_t i = 0; i < count; i++) {
+      TypedExpectation<F>* const expectation =
+          static_cast<TypedExpectation<F>*>(untyped_expectations_[i].get());
+      *why << "\n";
+      expectation->DescribeLocationTo(why);
+      if (count > 1) {
+        *why << "tried expectation #" << i << ": ";
+      }
+      *why << expectation->source_text() << "...\n";
+      expectation->ExplainMatchResultTo(args, why);
+      expectation->DescribeCallCountTo(why);
+    }
+  }
+};  // class FunctionMocker
+
+// Reports an uninteresting call (whose description is in msg) in the
+// manner specified by 'reaction'.
+void ReportUninterestingCall(CallReaction reaction, const std::string& msg);
+
+}  // namespace internal
+
+namespace internal {
+
+template <typename F>
+class MockFunction;
+
+template <typename R, typename... Args>
+class MockFunction<R(Args...)> {
+ public:
+  MockFunction(const MockFunction&) = delete;
+  MockFunction& operator=(const MockFunction&) = delete;
+
+  std::function<R(Args...)> AsStdFunction() {
+    return [this](Args... args) -> R {
+      return this->Call(std::forward<Args>(args)...);
+    };
+  }
+
+  // Implementation detail: the expansion of the MOCK_METHOD macro.
+  R Call(Args... args) {
+    mock_.SetOwnerAndName(this, "Call");
+    return mock_.Invoke(std::forward<Args>(args)...);
+  }
+
+  MockSpec<R(Args...)> gmock_Call(Matcher<Args>... m) {
+    mock_.RegisterOwner(this);
+    return mock_.With(std::move(m)...);
+  }
+
+  MockSpec<R(Args...)> gmock_Call(const WithoutMatchers&, R (*)(Args...)) {
+    return this->gmock_Call(::testing::A<Args>()...);
+  }
+
+ protected:
+  MockFunction() = default;
+  ~MockFunction() = default;
+
+ private:
+  FunctionMocker<R(Args...)> mock_;
+};
+
+/*
+The SignatureOf<F> struct is a meta-function returning function signature
+corresponding to the provided F argument.
+
+It makes use of MockFunction easier by allowing it to accept more F arguments
+than just function signatures.
+
+Specializations provided here cover only a signature type itself and
+std::function. However, if need be it can be easily extended to cover also other
+types (like for example boost::function).
+*/
+
+template <typename F>
+struct SignatureOf;
+
+template <typename R, typename... Args>
+struct SignatureOf<R(Args...)> {
+  using type = R(Args...);
+};
+
+template <typename F>
+struct SignatureOf<std::function<F>> : SignatureOf<F> {};
+
+template <typename F>
+using SignatureOfT = typename SignatureOf<F>::type;
+
+}  // namespace internal
+
+// A MockFunction<F> type has one mock method whose type is
+// internal::SignatureOfT<F>.  It is useful when you just want your
+// test code to emit some messages and have Google Mock verify the
+// right messages are sent (and perhaps at the right times).  For
+// example, if you are exercising code:
+//
+//   Foo(1);
+//   Foo(2);
+//   Foo(3);
+//
+// and want to verify that Foo(1) and Foo(3) both invoke
+// mock.Bar("a"), but Foo(2) doesn't invoke anything, you can write:
+//
+// TEST(FooTest, InvokesBarCorrectly) {
+//   MyMock mock;
+//   MockFunction<void(string check_point_name)> check;
+//   {
+//     InSequence s;
+//
+//     EXPECT_CALL(mock, Bar("a"));
+//     EXPECT_CALL(check, Call("1"));
+//     EXPECT_CALL(check, Call("2"));
+//     EXPECT_CALL(mock, Bar("a"));
+//   }
+//   Foo(1);
+//   check.Call("1");
+//   Foo(2);
+//   check.Call("2");
+//   Foo(3);
+// }
+//
+// The expectation spec says that the first Bar("a") must happen
+// before check point "1", the second Bar("a") must happen after check
+// point "2", and nothing should happen between the two check
+// points. The explicit check points make it easy to tell which
+// Bar("a") is called by which call to Foo().
+//
+// MockFunction<F> can also be used to exercise code that accepts
+// std::function<internal::SignatureOfT<F>> callbacks. To do so, use
+// AsStdFunction() method to create std::function proxy forwarding to
+// original object's Call. Example:
+//
+// TEST(FooTest, RunsCallbackWithBarArgument) {
+//   MockFunction<int(string)> callback;
+//   EXPECT_CALL(callback, Call("bar")).WillOnce(Return(1));
+//   Foo(callback.AsStdFunction());
+// }
+//
+// The internal::SignatureOfT<F> indirection allows to use other types
+// than just function signature type. This is typically useful when
+// providing a mock for a predefined std::function type. Example:
+//
+// using FilterPredicate = std::function<bool(string)>;
+// void MyFilterAlgorithm(FilterPredicate predicate);
+//
+// TEST(FooTest, FilterPredicateAlwaysAccepts) {
+//   MockFunction<FilterPredicate> predicateMock;
+//   EXPECT_CALL(predicateMock, Call(_)).WillRepeatedly(Return(true));
+//   MyFilterAlgorithm(predicateMock.AsStdFunction());
+// }
+template <typename F>
+class MockFunction : public internal::MockFunction<internal::SignatureOfT<F>> {
+  using Base = internal::MockFunction<internal::SignatureOfT<F>>;
+
+ public:
+  using Base::Base;
+};
+
+// The style guide prohibits "using" statements in a namespace scope
+// inside a header file.  However, the MockSpec class template is
+// meant to be defined in the ::testing namespace.  The following line
+// is just a trick for working around a bug in MSVC 8.0, which cannot
+// handle it if we define MockSpec in ::testing.
+using internal::MockSpec;
+
+// Const(x) is a convenient function for obtaining a const reference
+// to x.  This is useful for setting expectations on an overloaded
+// const mock method, e.g.
+//
+//   class MockFoo : public FooInterface {
+//    public:
+//     MOCK_METHOD0(Bar, int());
+//     MOCK_CONST_METHOD0(Bar, int&());
+//   };
+//
+//   MockFoo foo;
+//   // Expects a call to non-const MockFoo::Bar().
+//   EXPECT_CALL(foo, Bar());
+//   // Expects a call to const MockFoo::Bar().
+//   EXPECT_CALL(Const(foo), Bar());
+template <typename T>
+inline const T& Const(const T& x) { return x; }
+
+// Constructs an Expectation object that references and co-owns exp.
+inline Expectation::Expectation(internal::ExpectationBase& exp)  // NOLINT
+    : expectation_base_(exp.GetHandle().expectation_base()) {}
+
+}  // namespace testing
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
+
+// Implementation for ON_CALL and EXPECT_CALL macros. A separate macro is
+// required to avoid compile errors when the name of the method used in call is
+// a result of macro expansion. See CompilesWithMethodNameExpandedFromMacro
+// tests in internal/gmock-spec-builders_test.cc for more details.
+//
+// This macro supports statements both with and without parameter matchers. If
+// the parameter list is omitted, gMock will accept any parameters, which allows
+// tests to be written that don't need to encode the number of method
+// parameter. This technique may only be used for non-overloaded methods.
+//
+//   // These are the same:
+//   ON_CALL(mock, NoArgsMethod()).WillByDefault(...);
+//   ON_CALL(mock, NoArgsMethod).WillByDefault(...);
+//
+//   // As are these:
+//   ON_CALL(mock, TwoArgsMethod(_, _)).WillByDefault(...);
+//   ON_CALL(mock, TwoArgsMethod).WillByDefault(...);
+//
+//   // Can also specify args if you want, of course:
+//   ON_CALL(mock, TwoArgsMethod(_, 45)).WillByDefault(...);
+//
+//   // Overloads work as long as you specify parameters:
+//   ON_CALL(mock, OverloadedMethod(_)).WillByDefault(...);
+//   ON_CALL(mock, OverloadedMethod(_, _)).WillByDefault(...);
+//
+//   // Oops! Which overload did you want?
+//   ON_CALL(mock, OverloadedMethod).WillByDefault(...);
+//     => ERROR: call to member function 'gmock_OverloadedMethod' is ambiguous
+//
+// How this works: The mock class uses two overloads of the gmock_Method
+// expectation setter method plus an operator() overload on the MockSpec object.
+// In the matcher list form, the macro expands to:
+//
+//   // This statement:
+//   ON_CALL(mock, TwoArgsMethod(_, 45))...
+//
+//   // ...expands to:
+//   mock.gmock_TwoArgsMethod(_, 45)(WithoutMatchers(), nullptr)...
+//   |-------------v---------------||------------v-------------|
+//       invokes first overload        swallowed by operator()
+//
+//   // ...which is essentially:
+//   mock.gmock_TwoArgsMethod(_, 45)...
+//
+// Whereas the form without a matcher list:
+//
+//   // This statement:
+//   ON_CALL(mock, TwoArgsMethod)...
+//
+//   // ...expands to:
+//   mock.gmock_TwoArgsMethod(WithoutMatchers(), nullptr)...
+//   |-----------------------v--------------------------|
+//                 invokes second overload
+//
+//   // ...which is essentially:
+//   mock.gmock_TwoArgsMethod(_, _)...
+//
+// The WithoutMatchers() argument is used to disambiguate overloads and to
+// block the caller from accidentally invoking the second overload directly. The
+// second argument is an internal type derived from the method signature. The
+// failure to disambiguate two overloads of this method in the ON_CALL statement
+// is how we block callers from setting expectations on overloaded methods.
+#define GMOCK_ON_CALL_IMPL_(mock_expr, Setter, call)                    \
+  ((mock_expr).gmock_##call)(::testing::internal::GetWithoutMatchers(), \
+                             nullptr)                                   \
+      .Setter(__FILE__, __LINE__, #mock_expr, #call)
+
+#define ON_CALL(obj, call) \
+  GMOCK_ON_CALL_IMPL_(obj, InternalDefaultActionSetAt, call)
+
+#define EXPECT_CALL(obj, call) \
+  GMOCK_ON_CALL_IMPL_(obj, InternalExpectedAt, call)
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_
+
+namespace testing {
+namespace internal {
+template <typename T>
+using identity_t = T;
+
+template <typename Pattern>
+struct ThisRefAdjuster {
+  template <typename T>
+  using AdjustT = typename std::conditional<
+      std::is_const<typename std::remove_reference<Pattern>::type>::value,
+      typename std::conditional<std::is_lvalue_reference<Pattern>::value,
+                                const T&, const T&&>::type,
+      typename std::conditional<std::is_lvalue_reference<Pattern>::value, T&,
+                                T&&>::type>::type;
+
+  template <typename MockType>
+  static AdjustT<MockType> Adjust(const MockType& mock) {
+    return static_cast<AdjustT<MockType>>(const_cast<MockType&>(mock));
+  }
+};
+
+}  // namespace internal
+
+// The style guide prohibits "using" statements in a namespace scope
+// inside a header file.  However, the FunctionMocker class template
+// is meant to be defined in the ::testing namespace.  The following
+// line is just a trick for working around a bug in MSVC 8.0, which
+// cannot handle it if we define FunctionMocker in ::testing.
+using internal::FunctionMocker;
+}  // namespace testing
+
+#define MOCK_METHOD(...) \
+  GMOCK_PP_VARIADIC_CALL(GMOCK_INTERNAL_MOCK_METHOD_ARG_, __VA_ARGS__)
+
+#define GMOCK_INTERNAL_MOCK_METHOD_ARG_1(...) \
+  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
+
+#define GMOCK_INTERNAL_MOCK_METHOD_ARG_2(...) \
+  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
+
+#define GMOCK_INTERNAL_MOCK_METHOD_ARG_3(_Ret, _MethodName, _Args) \
+  GMOCK_INTERNAL_MOCK_METHOD_ARG_4(_Ret, _MethodName, _Args, ())
+
+#define GMOCK_INTERNAL_MOCK_METHOD_ARG_4(_Ret, _MethodName, _Args, _Spec)     \
+  GMOCK_INTERNAL_ASSERT_PARENTHESIS(_Args);                                   \
+  GMOCK_INTERNAL_ASSERT_PARENTHESIS(_Spec);                                   \
+  GMOCK_INTERNAL_ASSERT_VALID_SIGNATURE(                                      \
+      GMOCK_PP_NARG0 _Args, GMOCK_INTERNAL_SIGNATURE(_Ret, _Args));           \
+  GMOCK_INTERNAL_ASSERT_VALID_SPEC(_Spec)                                     \
+  GMOCK_INTERNAL_MOCK_METHOD_IMPL(                                            \
+      GMOCK_PP_NARG0 _Args, _MethodName, GMOCK_INTERNAL_HAS_CONST(_Spec),     \
+      GMOCK_INTERNAL_HAS_OVERRIDE(_Spec), GMOCK_INTERNAL_HAS_FINAL(_Spec),    \
+      GMOCK_INTERNAL_GET_NOEXCEPT_SPEC(_Spec),                                \
+      GMOCK_INTERNAL_GET_CALLTYPE(_Spec), GMOCK_INTERNAL_GET_REF_SPEC(_Spec), \
+      (GMOCK_INTERNAL_SIGNATURE(_Ret, _Args)))
+
+#define GMOCK_INTERNAL_MOCK_METHOD_ARG_5(...) \
+  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
+
+#define GMOCK_INTERNAL_MOCK_METHOD_ARG_6(...) \
+  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
+
+#define GMOCK_INTERNAL_MOCK_METHOD_ARG_7(...) \
+  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
+
+#define GMOCK_INTERNAL_WRONG_ARITY(...)                                      \
+  static_assert(                                                             \
+      false,                                                                 \
+      "MOCK_METHOD must be called with 3 or 4 arguments. _Ret, "             \
+      "_MethodName, _Args and optionally _Spec. _Args and _Spec must be "    \
+      "enclosed in parentheses. If _Ret is a type with unprotected commas, " \
+      "it must also be enclosed in parentheses.")
+
+#define GMOCK_INTERNAL_ASSERT_PARENTHESIS(_Tuple) \
+  static_assert(                                  \
+      GMOCK_PP_IS_ENCLOSED_PARENS(_Tuple),        \
+      GMOCK_PP_STRINGIZE(_Tuple) " should be enclosed in parentheses.")
+
+#define GMOCK_INTERNAL_ASSERT_VALID_SIGNATURE(_N, ...)                 \
+  static_assert(                                                       \
+      std::is_function<__VA_ARGS__>::value,                            \
+      "Signature must be a function type, maybe return type contains " \
+      "unprotected comma.");                                           \
+  static_assert(                                                       \
+      ::testing::tuple_size<typename ::testing::internal::Function<    \
+              __VA_ARGS__>::ArgumentTuple>::value == _N,               \
+      "This method does not take " GMOCK_PP_STRINGIZE(                 \
+          _N) " arguments. Parenthesize all types with unprotected commas.")
+
+#define GMOCK_INTERNAL_ASSERT_VALID_SPEC(_Spec) \
+  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_ASSERT_VALID_SPEC_ELEMENT, ~, _Spec)
+
+#define GMOCK_INTERNAL_MOCK_METHOD_IMPL(_N, _MethodName, _Constness,           \
+                                        _Override, _Final, _NoexceptSpec,      \
+                                        _CallType, _RefSpec, _Signature)       \
+  typename ::testing::internal::Function<GMOCK_PP_REMOVE_PARENS(               \
+      _Signature)>::Result                                                     \
+  GMOCK_INTERNAL_EXPAND(_CallType)                                             \
+      _MethodName(GMOCK_PP_REPEAT(GMOCK_INTERNAL_PARAMETER, _Signature, _N))   \
+          GMOCK_PP_IF(_Constness, const, ) _RefSpec _NoexceptSpec              \
+          GMOCK_PP_IF(_Override, override, ) GMOCK_PP_IF(_Final, final, ) {    \
+    GMOCK_MOCKER_(_N, _Constness, _MethodName)                                 \
+        .SetOwnerAndName(this, #_MethodName);                                  \
+    return GMOCK_MOCKER_(_N, _Constness, _MethodName)                          \
+        .Invoke(GMOCK_PP_REPEAT(GMOCK_INTERNAL_FORWARD_ARG, _Signature, _N));  \
+  }                                                                            \
+  ::testing::MockSpec<GMOCK_PP_REMOVE_PARENS(_Signature)> gmock_##_MethodName( \
+      GMOCK_PP_REPEAT(GMOCK_INTERNAL_MATCHER_PARAMETER, _Signature, _N))       \
+      GMOCK_PP_IF(_Constness, const, ) _RefSpec {                              \
+    GMOCK_MOCKER_(_N, _Constness, _MethodName).RegisterOwner(this);            \
+    return GMOCK_MOCKER_(_N, _Constness, _MethodName)                          \
+        .With(GMOCK_PP_REPEAT(GMOCK_INTERNAL_MATCHER_ARGUMENT, , _N));         \
+  }                                                                            \
+  ::testing::MockSpec<GMOCK_PP_REMOVE_PARENS(_Signature)> gmock_##_MethodName( \
+      const ::testing::internal::WithoutMatchers&,                             \
+      GMOCK_PP_IF(_Constness, const, )::testing::internal::Function<           \
+          GMOCK_PP_REMOVE_PARENS(_Signature)>*) const _RefSpec _NoexceptSpec { \
+    return ::testing::internal::ThisRefAdjuster<GMOCK_PP_IF(                   \
+        _Constness, const, ) int _RefSpec>::Adjust(*this)                      \
+        .gmock_##_MethodName(GMOCK_PP_REPEAT(                                  \
+            GMOCK_INTERNAL_A_MATCHER_ARGUMENT, _Signature, _N));               \
+  }                                                                            \
+  mutable ::testing::FunctionMocker<GMOCK_PP_REMOVE_PARENS(_Signature)>        \
+      GMOCK_MOCKER_(_N, _Constness, _MethodName)
+
+#define GMOCK_INTERNAL_EXPAND(...) __VA_ARGS__
+
+// Five Valid modifiers.
+#define GMOCK_INTERNAL_HAS_CONST(_Tuple) \
+  GMOCK_PP_HAS_COMMA(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_DETECT_CONST, ~, _Tuple))
+
+#define GMOCK_INTERNAL_HAS_OVERRIDE(_Tuple) \
+  GMOCK_PP_HAS_COMMA(                       \
+      GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_DETECT_OVERRIDE, ~, _Tuple))
+
+#define GMOCK_INTERNAL_HAS_FINAL(_Tuple) \
+  GMOCK_PP_HAS_COMMA(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_DETECT_FINAL, ~, _Tuple))
+
+#define GMOCK_INTERNAL_GET_NOEXCEPT_SPEC(_Tuple) \
+  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_NOEXCEPT_SPEC_IF_NOEXCEPT, ~, _Tuple)
+
+#define GMOCK_INTERNAL_NOEXCEPT_SPEC_IF_NOEXCEPT(_i, _, _elem)          \
+  GMOCK_PP_IF(                                                          \
+      GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_NOEXCEPT(_i, _, _elem)), \
+      _elem, )
+
+#define GMOCK_INTERNAL_GET_REF_SPEC(_Tuple) \
+  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_REF_SPEC_IF_REF, ~, _Tuple)
+
+#define GMOCK_INTERNAL_REF_SPEC_IF_REF(_i, _, _elem)                       \
+  GMOCK_PP_IF(GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_REF(_i, _, _elem)), \
+              GMOCK_PP_CAT(GMOCK_INTERNAL_UNPACK_, _elem), )
+
+#define GMOCK_INTERNAL_GET_CALLTYPE(_Tuple) \
+  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_GET_CALLTYPE_IMPL, ~, _Tuple)
+
+#define GMOCK_INTERNAL_ASSERT_VALID_SPEC_ELEMENT(_i, _, _elem)            \
+  static_assert(                                                          \
+      (GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_CONST(_i, _, _elem)) +    \
+       GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_OVERRIDE(_i, _, _elem)) + \
+       GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_FINAL(_i, _, _elem)) +    \
+       GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_NOEXCEPT(_i, _, _elem)) + \
+       GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_REF(_i, _, _elem)) +      \
+       GMOCK_INTERNAL_IS_CALLTYPE(_elem)) == 1,                           \
+      GMOCK_PP_STRINGIZE(                                                 \
+          _elem) " cannot be recognized as a valid specification modifier.");
+
+// Modifiers implementation.
+#define GMOCK_INTERNAL_DETECT_CONST(_i, _, _elem) \
+  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_CONST_I_, _elem)
+
+#define GMOCK_INTERNAL_DETECT_CONST_I_const ,
+
+#define GMOCK_INTERNAL_DETECT_OVERRIDE(_i, _, _elem) \
+  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_OVERRIDE_I_, _elem)
+
+#define GMOCK_INTERNAL_DETECT_OVERRIDE_I_override ,
+
+#define GMOCK_INTERNAL_DETECT_FINAL(_i, _, _elem) \
+  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_FINAL_I_, _elem)
+
+#define GMOCK_INTERNAL_DETECT_FINAL_I_final ,
+
+#define GMOCK_INTERNAL_DETECT_NOEXCEPT(_i, _, _elem) \
+  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_NOEXCEPT_I_, _elem)
+
+#define GMOCK_INTERNAL_DETECT_NOEXCEPT_I_noexcept ,
+
+#define GMOCK_INTERNAL_DETECT_REF(_i, _, _elem) \
+  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_REF_I_, _elem)
+
+#define GMOCK_INTERNAL_DETECT_REF_I_ref ,
+
+#define GMOCK_INTERNAL_UNPACK_ref(x) x
+
+#define GMOCK_INTERNAL_GET_CALLTYPE_IMPL(_i, _, _elem)           \
+  GMOCK_PP_IF(GMOCK_INTERNAL_IS_CALLTYPE(_elem),                 \
+              GMOCK_INTERNAL_GET_VALUE_CALLTYPE, GMOCK_PP_EMPTY) \
+  (_elem)
+
+// TODO(iserna): GMOCK_INTERNAL_IS_CALLTYPE and
+// GMOCK_INTERNAL_GET_VALUE_CALLTYPE needed more expansions to work on windows
+// maybe they can be simplified somehow.
+#define GMOCK_INTERNAL_IS_CALLTYPE(_arg) \
+  GMOCK_INTERNAL_IS_CALLTYPE_I(          \
+      GMOCK_PP_CAT(GMOCK_INTERNAL_IS_CALLTYPE_HELPER_, _arg))
+#define GMOCK_INTERNAL_IS_CALLTYPE_I(_arg) GMOCK_PP_IS_ENCLOSED_PARENS(_arg)
+
+#define GMOCK_INTERNAL_GET_VALUE_CALLTYPE(_arg) \
+  GMOCK_INTERNAL_GET_VALUE_CALLTYPE_I(          \
+      GMOCK_PP_CAT(GMOCK_INTERNAL_IS_CALLTYPE_HELPER_, _arg))
+#define GMOCK_INTERNAL_GET_VALUE_CALLTYPE_I(_arg) \
+  GMOCK_PP_IDENTITY _arg
+
+#define GMOCK_INTERNAL_IS_CALLTYPE_HELPER_Calltype
+
+// Note: The use of `identity_t` here allows _Ret to represent return types that
+// would normally need to be specified in a different way. For example, a method
+// returning a function pointer must be written as
+//
+// fn_ptr_return_t (*method(method_args_t...))(fn_ptr_args_t...)
+//
+// But we only support placing the return type at the beginning. To handle this,
+// we wrap all calls in identity_t, so that a declaration will be expanded to
+//
+// identity_t<fn_ptr_return_t (*)(fn_ptr_args_t...)> method(method_args_t...)
+//
+// This allows us to work around the syntactic oddities of function/method
+// types.
+#define GMOCK_INTERNAL_SIGNATURE(_Ret, _Args)                                 \
+  ::testing::internal::identity_t<GMOCK_PP_IF(GMOCK_PP_IS_BEGIN_PARENS(_Ret), \
+                                              GMOCK_PP_REMOVE_PARENS,         \
+                                              GMOCK_PP_IDENTITY)(_Ret)>(      \
+      GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_GET_TYPE, _, _Args))
+
+#define GMOCK_INTERNAL_GET_TYPE(_i, _, _elem)                          \
+  GMOCK_PP_COMMA_IF(_i)                                                \
+  GMOCK_PP_IF(GMOCK_PP_IS_BEGIN_PARENS(_elem), GMOCK_PP_REMOVE_PARENS, \
+              GMOCK_PP_IDENTITY)                                       \
+  (_elem)
+
+#define GMOCK_INTERNAL_PARAMETER(_i, _Signature, _)            \
+  GMOCK_PP_COMMA_IF(_i)                                        \
+  GMOCK_INTERNAL_ARG_O(_i, GMOCK_PP_REMOVE_PARENS(_Signature)) \
+  gmock_a##_i
+
+#define GMOCK_INTERNAL_FORWARD_ARG(_i, _Signature, _) \
+  GMOCK_PP_COMMA_IF(_i)                               \
+  ::std::forward<GMOCK_INTERNAL_ARG_O(                \
+      _i, GMOCK_PP_REMOVE_PARENS(_Signature))>(gmock_a##_i)
+
+#define GMOCK_INTERNAL_MATCHER_PARAMETER(_i, _Signature, _)        \
+  GMOCK_PP_COMMA_IF(_i)                                            \
+  GMOCK_INTERNAL_MATCHER_O(_i, GMOCK_PP_REMOVE_PARENS(_Signature)) \
+  gmock_a##_i
+
+#define GMOCK_INTERNAL_MATCHER_ARGUMENT(_i, _1, _2) \
+  GMOCK_PP_COMMA_IF(_i)                             \
+  gmock_a##_i
+
+#define GMOCK_INTERNAL_A_MATCHER_ARGUMENT(_i, _Signature, _) \
+  GMOCK_PP_COMMA_IF(_i)                                      \
+  ::testing::A<GMOCK_INTERNAL_ARG_O(_i, GMOCK_PP_REMOVE_PARENS(_Signature))>()
+
+#define GMOCK_INTERNAL_ARG_O(_i, ...) \
+  typename ::testing::internal::Function<__VA_ARGS__>::template Arg<_i>::type
+
+#define GMOCK_INTERNAL_MATCHER_O(_i, ...)                          \
+  const ::testing::Matcher<typename ::testing::internal::Function< \
+      __VA_ARGS__>::template Arg<_i>::type>&
+
+#define MOCK_METHOD0(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 0, __VA_ARGS__)
+#define MOCK_METHOD1(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 1, __VA_ARGS__)
+#define MOCK_METHOD2(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 2, __VA_ARGS__)
+#define MOCK_METHOD3(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 3, __VA_ARGS__)
+#define MOCK_METHOD4(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 4, __VA_ARGS__)
+#define MOCK_METHOD5(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 5, __VA_ARGS__)
+#define MOCK_METHOD6(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 6, __VA_ARGS__)
+#define MOCK_METHOD7(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 7, __VA_ARGS__)
+#define MOCK_METHOD8(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 8, __VA_ARGS__)
+#define MOCK_METHOD9(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 9, __VA_ARGS__)
+#define MOCK_METHOD10(m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(, , m, 10, __VA_ARGS__)
+
+#define MOCK_CONST_METHOD0(m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 0, __VA_ARGS__)
+#define MOCK_CONST_METHOD1(m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 1, __VA_ARGS__)
+#define MOCK_CONST_METHOD2(m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 2, __VA_ARGS__)
+#define MOCK_CONST_METHOD3(m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 3, __VA_ARGS__)
+#define MOCK_CONST_METHOD4(m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 4, __VA_ARGS__)
+#define MOCK_CONST_METHOD5(m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 5, __VA_ARGS__)
+#define MOCK_CONST_METHOD6(m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 6, __VA_ARGS__)
+#define MOCK_CONST_METHOD7(m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 7, __VA_ARGS__)
+#define MOCK_CONST_METHOD8(m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 8, __VA_ARGS__)
+#define MOCK_CONST_METHOD9(m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 9, __VA_ARGS__)
+#define MOCK_CONST_METHOD10(m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 10, __VA_ARGS__)
+
+#define MOCK_METHOD0_T(m, ...) MOCK_METHOD0(m, __VA_ARGS__)
+#define MOCK_METHOD1_T(m, ...) MOCK_METHOD1(m, __VA_ARGS__)
+#define MOCK_METHOD2_T(m, ...) MOCK_METHOD2(m, __VA_ARGS__)
+#define MOCK_METHOD3_T(m, ...) MOCK_METHOD3(m, __VA_ARGS__)
+#define MOCK_METHOD4_T(m, ...) MOCK_METHOD4(m, __VA_ARGS__)
+#define MOCK_METHOD5_T(m, ...) MOCK_METHOD5(m, __VA_ARGS__)
+#define MOCK_METHOD6_T(m, ...) MOCK_METHOD6(m, __VA_ARGS__)
+#define MOCK_METHOD7_T(m, ...) MOCK_METHOD7(m, __VA_ARGS__)
+#define MOCK_METHOD8_T(m, ...) MOCK_METHOD8(m, __VA_ARGS__)
+#define MOCK_METHOD9_T(m, ...) MOCK_METHOD9(m, __VA_ARGS__)
+#define MOCK_METHOD10_T(m, ...) MOCK_METHOD10(m, __VA_ARGS__)
+
+#define MOCK_CONST_METHOD0_T(m, ...) MOCK_CONST_METHOD0(m, __VA_ARGS__)
+#define MOCK_CONST_METHOD1_T(m, ...) MOCK_CONST_METHOD1(m, __VA_ARGS__)
+#define MOCK_CONST_METHOD2_T(m, ...) MOCK_CONST_METHOD2(m, __VA_ARGS__)
+#define MOCK_CONST_METHOD3_T(m, ...) MOCK_CONST_METHOD3(m, __VA_ARGS__)
+#define MOCK_CONST_METHOD4_T(m, ...) MOCK_CONST_METHOD4(m, __VA_ARGS__)
+#define MOCK_CONST_METHOD5_T(m, ...) MOCK_CONST_METHOD5(m, __VA_ARGS__)
+#define MOCK_CONST_METHOD6_T(m, ...) MOCK_CONST_METHOD6(m, __VA_ARGS__)
+#define MOCK_CONST_METHOD7_T(m, ...) MOCK_CONST_METHOD7(m, __VA_ARGS__)
+#define MOCK_CONST_METHOD8_T(m, ...) MOCK_CONST_METHOD8(m, __VA_ARGS__)
+#define MOCK_CONST_METHOD9_T(m, ...) MOCK_CONST_METHOD9(m, __VA_ARGS__)
+#define MOCK_CONST_METHOD10_T(m, ...) MOCK_CONST_METHOD10(m, __VA_ARGS__)
+
+#define MOCK_METHOD0_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 0, __VA_ARGS__)
+#define MOCK_METHOD1_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 1, __VA_ARGS__)
+#define MOCK_METHOD2_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 2, __VA_ARGS__)
+#define MOCK_METHOD3_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 3, __VA_ARGS__)
+#define MOCK_METHOD4_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 4, __VA_ARGS__)
+#define MOCK_METHOD5_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 5, __VA_ARGS__)
+#define MOCK_METHOD6_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 6, __VA_ARGS__)
+#define MOCK_METHOD7_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 7, __VA_ARGS__)
+#define MOCK_METHOD8_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 8, __VA_ARGS__)
+#define MOCK_METHOD9_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 9, __VA_ARGS__)
+#define MOCK_METHOD10_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 10, __VA_ARGS__)
+
+#define MOCK_CONST_METHOD0_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 0, __VA_ARGS__)
+#define MOCK_CONST_METHOD1_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 1, __VA_ARGS__)
+#define MOCK_CONST_METHOD2_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 2, __VA_ARGS__)
+#define MOCK_CONST_METHOD3_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 3, __VA_ARGS__)
+#define MOCK_CONST_METHOD4_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 4, __VA_ARGS__)
+#define MOCK_CONST_METHOD5_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 5, __VA_ARGS__)
+#define MOCK_CONST_METHOD6_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 6, __VA_ARGS__)
+#define MOCK_CONST_METHOD7_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 7, __VA_ARGS__)
+#define MOCK_CONST_METHOD8_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 8, __VA_ARGS__)
+#define MOCK_CONST_METHOD9_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 9, __VA_ARGS__)
+#define MOCK_CONST_METHOD10_WITH_CALLTYPE(ct, m, ...) \
+  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 10, __VA_ARGS__)
+
+#define MOCK_METHOD0_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_METHOD0_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_METHOD1_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_METHOD1_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_METHOD2_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_METHOD2_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_METHOD3_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_METHOD3_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_METHOD4_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_METHOD4_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_METHOD5_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_METHOD5_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_METHOD6_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_METHOD6_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_METHOD7_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_METHOD7_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_METHOD8_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_METHOD8_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_METHOD9_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_METHOD9_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_METHOD10_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_METHOD10_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+
+#define MOCK_CONST_METHOD0_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_CONST_METHOD0_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_CONST_METHOD1_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_CONST_METHOD1_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_CONST_METHOD2_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_CONST_METHOD2_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_CONST_METHOD3_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_CONST_METHOD3_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_CONST_METHOD4_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_CONST_METHOD4_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_CONST_METHOD5_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_CONST_METHOD5_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_CONST_METHOD6_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_CONST_METHOD6_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_CONST_METHOD7_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_CONST_METHOD7_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_CONST_METHOD8_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_CONST_METHOD8_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_CONST_METHOD9_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_CONST_METHOD9_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+#define MOCK_CONST_METHOD10_T_WITH_CALLTYPE(ct, m, ...) \
+  MOCK_CONST_METHOD10_WITH_CALLTYPE(ct, m, __VA_ARGS__)
+
+#define GMOCK_INTERNAL_MOCK_METHODN(constness, ct, Method, args_num, ...) \
+  GMOCK_INTERNAL_ASSERT_VALID_SIGNATURE(                                  \
+      args_num, ::testing::internal::identity_t<__VA_ARGS__>);            \
+  GMOCK_INTERNAL_MOCK_METHOD_IMPL(                                        \
+      args_num, Method, GMOCK_PP_NARG0(constness), 0, 0, , ct, ,          \
+      (::testing::internal::identity_t<__VA_ARGS__>))
+
+#define GMOCK_MOCKER_(arity, constness, Method) \
+  GTEST_CONCAT_TOKEN_(gmock##constness##arity##_##Method##_, __LINE__)
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_FUNCTION_MOCKER_H_
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// This file implements some commonly used variadic actions.
+
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
+
+#include <memory>
+#include <utility>
+
+
+// Include any custom callback actions added by the local installation.
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_GENERATED_ACTIONS_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_GENERATED_ACTIONS_H_
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_GENERATED_ACTIONS_H_
+
+// Sometimes you want to give an action explicit template parameters
+// that cannot be inferred from its value parameters.  ACTION() and
+// ACTION_P*() don't support that.  ACTION_TEMPLATE() remedies that
+// and can be viewed as an extension to ACTION() and ACTION_P*().
+//
+// The syntax:
+//
+//   ACTION_TEMPLATE(ActionName,
+//                   HAS_m_TEMPLATE_PARAMS(kind1, name1, ..., kind_m, name_m),
+//                   AND_n_VALUE_PARAMS(p1, ..., p_n)) { statements; }
+//
+// defines an action template that takes m explicit template
+// parameters and n value parameters.  name_i is the name of the i-th
+// template parameter, and kind_i specifies whether it's a typename,
+// an integral constant, or a template.  p_i is the name of the i-th
+// value parameter.
+//
+// Example:
+//
+//   // DuplicateArg<k, T>(output) converts the k-th argument of the mock
+//   // function to type T and copies it to *output.
+//   ACTION_TEMPLATE(DuplicateArg,
+//                   HAS_2_TEMPLATE_PARAMS(int, k, typename, T),
+//                   AND_1_VALUE_PARAMS(output)) {
+//     *output = T(::std::get<k>(args));
+//   }
+//   ...
+//     int n;
+//     EXPECT_CALL(mock, Foo(_, _))
+//         .WillOnce(DuplicateArg<1, unsigned char>(&n));
+//
+// To create an instance of an action template, write:
+//
+//   ActionName<t1, ..., t_m>(v1, ..., v_n)
+//
+// where the ts are the template arguments and the vs are the value
+// arguments.  The value argument types are inferred by the compiler.
+// If you want to explicitly specify the value argument types, you can
+// provide additional template arguments:
+//
+//   ActionName<t1, ..., t_m, u1, ..., u_k>(v1, ..., v_n)
+//
+// where u_i is the desired type of v_i.
+//
+// ACTION_TEMPLATE and ACTION/ACTION_P* can be overloaded on the
+// number of value parameters, but not on the number of template
+// parameters.  Without the restriction, the meaning of the following
+// is unclear:
+//
+//   OverloadedAction<int, bool>(x);
+//
+// Are we using a single-template-parameter action where 'bool' refers
+// to the type of x, or are we using a two-template-parameter action
+// where the compiler is asked to infer the type of x?
+//
+// Implementation notes:
+//
+// GMOCK_INTERNAL_*_HAS_m_TEMPLATE_PARAMS and
+// GMOCK_INTERNAL_*_AND_n_VALUE_PARAMS are internal macros for
+// implementing ACTION_TEMPLATE.  The main trick we use is to create
+// new macro invocations when expanding a macro.  For example, we have
+//
+//   #define ACTION_TEMPLATE(name, template_params, value_params)
+//       ... GMOCK_INTERNAL_DECL_##template_params ...
+//
+// which causes ACTION_TEMPLATE(..., HAS_1_TEMPLATE_PARAMS(typename, T), ...)
+// to expand to
+//
+//       ... GMOCK_INTERNAL_DECL_HAS_1_TEMPLATE_PARAMS(typename, T) ...
+//
+// Since GMOCK_INTERNAL_DECL_HAS_1_TEMPLATE_PARAMS is a macro, the
+// preprocessor will continue to expand it to
+//
+//       ... typename T ...
+//
+// This technique conforms to the C++ standard and is portable.  It
+// allows us to implement action templates using O(N) code, where N is
+// the maximum number of template/value parameters supported.  Without
+// using it, we'd have to devote O(N^2) amount of code to implement all
+// combinations of m and n.
+
+// Declares the template parameters.
+#define GMOCK_INTERNAL_DECL_HAS_1_TEMPLATE_PARAMS(kind0, name0) kind0 name0
+#define GMOCK_INTERNAL_DECL_HAS_2_TEMPLATE_PARAMS(kind0, name0, kind1, \
+    name1) kind0 name0, kind1 name1
+#define GMOCK_INTERNAL_DECL_HAS_3_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2) kind0 name0, kind1 name1, kind2 name2
+#define GMOCK_INTERNAL_DECL_HAS_4_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2, kind3, name3) kind0 name0, kind1 name1, kind2 name2, \
+    kind3 name3
+#define GMOCK_INTERNAL_DECL_HAS_5_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2, kind3, name3, kind4, name4) kind0 name0, kind1 name1, \
+    kind2 name2, kind3 name3, kind4 name4
+#define GMOCK_INTERNAL_DECL_HAS_6_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2, kind3, name3, kind4, name4, kind5, name5) kind0 name0, \
+    kind1 name1, kind2 name2, kind3 name3, kind4 name4, kind5 name5
+#define GMOCK_INTERNAL_DECL_HAS_7_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, \
+    name6) kind0 name0, kind1 name1, kind2 name2, kind3 name3, kind4 name4, \
+    kind5 name5, kind6 name6
+#define GMOCK_INTERNAL_DECL_HAS_8_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, name6, \
+    kind7, name7) kind0 name0, kind1 name1, kind2 name2, kind3 name3, \
+    kind4 name4, kind5 name5, kind6 name6, kind7 name7
+#define GMOCK_INTERNAL_DECL_HAS_9_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, name6, \
+    kind7, name7, kind8, name8) kind0 name0, kind1 name1, kind2 name2, \
+    kind3 name3, kind4 name4, kind5 name5, kind6 name6, kind7 name7, \
+    kind8 name8
+#define GMOCK_INTERNAL_DECL_HAS_10_TEMPLATE_PARAMS(kind0, name0, kind1, \
+    name1, kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, \
+    name6, kind7, name7, kind8, name8, kind9, name9) kind0 name0, \
+    kind1 name1, kind2 name2, kind3 name3, kind4 name4, kind5 name5, \
+    kind6 name6, kind7 name7, kind8 name8, kind9 name9
+
+// Lists the template parameters.
+#define GMOCK_INTERNAL_LIST_HAS_1_TEMPLATE_PARAMS(kind0, name0) name0
+#define GMOCK_INTERNAL_LIST_HAS_2_TEMPLATE_PARAMS(kind0, name0, kind1, \
+    name1) name0, name1
+#define GMOCK_INTERNAL_LIST_HAS_3_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2) name0, name1, name2
+#define GMOCK_INTERNAL_LIST_HAS_4_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2, kind3, name3) name0, name1, name2, name3
+#define GMOCK_INTERNAL_LIST_HAS_5_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2, kind3, name3, kind4, name4) name0, name1, name2, name3, \
+    name4
+#define GMOCK_INTERNAL_LIST_HAS_6_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2, kind3, name3, kind4, name4, kind5, name5) name0, name1, \
+    name2, name3, name4, name5
+#define GMOCK_INTERNAL_LIST_HAS_7_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, \
+    name6) name0, name1, name2, name3, name4, name5, name6
+#define GMOCK_INTERNAL_LIST_HAS_8_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, name6, \
+    kind7, name7) name0, name1, name2, name3, name4, name5, name6, name7
+#define GMOCK_INTERNAL_LIST_HAS_9_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
+    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, name6, \
+    kind7, name7, kind8, name8) name0, name1, name2, name3, name4, name5, \
+    name6, name7, name8
+#define GMOCK_INTERNAL_LIST_HAS_10_TEMPLATE_PARAMS(kind0, name0, kind1, \
+    name1, kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, \
+    name6, kind7, name7, kind8, name8, kind9, name9) name0, name1, name2, \
+    name3, name4, name5, name6, name7, name8, name9
+
+// Declares the types of value parameters.
+#define GMOCK_INTERNAL_DECL_TYPE_AND_0_VALUE_PARAMS()
+#define GMOCK_INTERNAL_DECL_TYPE_AND_1_VALUE_PARAMS(p0) , typename p0##_type
+#define GMOCK_INTERNAL_DECL_TYPE_AND_2_VALUE_PARAMS(p0, p1) , \
+    typename p0##_type, typename p1##_type
+#define GMOCK_INTERNAL_DECL_TYPE_AND_3_VALUE_PARAMS(p0, p1, p2) , \
+    typename p0##_type, typename p1##_type, typename p2##_type
+#define GMOCK_INTERNAL_DECL_TYPE_AND_4_VALUE_PARAMS(p0, p1, p2, p3) , \
+    typename p0##_type, typename p1##_type, typename p2##_type, \
+    typename p3##_type
+#define GMOCK_INTERNAL_DECL_TYPE_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4) , \
+    typename p0##_type, typename p1##_type, typename p2##_type, \
+    typename p3##_type, typename p4##_type
+#define GMOCK_INTERNAL_DECL_TYPE_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5) , \
+    typename p0##_type, typename p1##_type, typename p2##_type, \
+    typename p3##_type, typename p4##_type, typename p5##_type
+#define GMOCK_INTERNAL_DECL_TYPE_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
+    p6) , typename p0##_type, typename p1##_type, typename p2##_type, \
+    typename p3##_type, typename p4##_type, typename p5##_type, \
+    typename p6##_type
+#define GMOCK_INTERNAL_DECL_TYPE_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
+    p6, p7) , typename p0##_type, typename p1##_type, typename p2##_type, \
+    typename p3##_type, typename p4##_type, typename p5##_type, \
+    typename p6##_type, typename p7##_type
+#define GMOCK_INTERNAL_DECL_TYPE_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
+    p6, p7, p8) , typename p0##_type, typename p1##_type, typename p2##_type, \
+    typename p3##_type, typename p4##_type, typename p5##_type, \
+    typename p6##_type, typename p7##_type, typename p8##_type
+#define GMOCK_INTERNAL_DECL_TYPE_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
+    p6, p7, p8, p9) , typename p0##_type, typename p1##_type, \
+    typename p2##_type, typename p3##_type, typename p4##_type, \
+    typename p5##_type, typename p6##_type, typename p7##_type, \
+    typename p8##_type, typename p9##_type
+
+// Initializes the value parameters.
+#define GMOCK_INTERNAL_INIT_AND_0_VALUE_PARAMS()\
+    ()
+#define GMOCK_INTERNAL_INIT_AND_1_VALUE_PARAMS(p0)\
+    (p0##_type gmock_p0) : p0(::std::move(gmock_p0))
+#define GMOCK_INTERNAL_INIT_AND_2_VALUE_PARAMS(p0, p1)\
+    (p0##_type gmock_p0, p1##_type gmock_p1) : p0(::std::move(gmock_p0)), \
+        p1(::std::move(gmock_p1))
+#define GMOCK_INTERNAL_INIT_AND_3_VALUE_PARAMS(p0, p1, p2)\
+    (p0##_type gmock_p0, p1##_type gmock_p1, \
+        p2##_type gmock_p2) : p0(::std::move(gmock_p0)), \
+        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2))
+#define GMOCK_INTERNAL_INIT_AND_4_VALUE_PARAMS(p0, p1, p2, p3)\
+    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
+        p3##_type gmock_p3) : p0(::std::move(gmock_p0)), \
+        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
+        p3(::std::move(gmock_p3))
+#define GMOCK_INTERNAL_INIT_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4)\
+    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
+        p3##_type gmock_p3, p4##_type gmock_p4) : p0(::std::move(gmock_p0)), \
+        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
+        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4))
+#define GMOCK_INTERNAL_INIT_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5)\
+    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
+        p3##_type gmock_p3, p4##_type gmock_p4, \
+        p5##_type gmock_p5) : p0(::std::move(gmock_p0)), \
+        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
+        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
+        p5(::std::move(gmock_p5))
+#define GMOCK_INTERNAL_INIT_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6)\
+    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
+        p3##_type gmock_p3, p4##_type gmock_p4, p5##_type gmock_p5, \
+        p6##_type gmock_p6) : p0(::std::move(gmock_p0)), \
+        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
+        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
+        p5(::std::move(gmock_p5)), p6(::std::move(gmock_p6))
+#define GMOCK_INTERNAL_INIT_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, p7)\
+    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
+        p3##_type gmock_p3, p4##_type gmock_p4, p5##_type gmock_p5, \
+        p6##_type gmock_p6, p7##_type gmock_p7) : p0(::std::move(gmock_p0)), \
+        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
+        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
+        p5(::std::move(gmock_p5)), p6(::std::move(gmock_p6)), \
+        p7(::std::move(gmock_p7))
+#define GMOCK_INTERNAL_INIT_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7, p8)\
+    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
+        p3##_type gmock_p3, p4##_type gmock_p4, p5##_type gmock_p5, \
+        p6##_type gmock_p6, p7##_type gmock_p7, \
+        p8##_type gmock_p8) : p0(::std::move(gmock_p0)), \
+        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
+        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
+        p5(::std::move(gmock_p5)), p6(::std::move(gmock_p6)), \
+        p7(::std::move(gmock_p7)), p8(::std::move(gmock_p8))
+#define GMOCK_INTERNAL_INIT_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7, p8, p9)\
+    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
+        p3##_type gmock_p3, p4##_type gmock_p4, p5##_type gmock_p5, \
+        p6##_type gmock_p6, p7##_type gmock_p7, p8##_type gmock_p8, \
+        p9##_type gmock_p9) : p0(::std::move(gmock_p0)), \
+        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
+        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
+        p5(::std::move(gmock_p5)), p6(::std::move(gmock_p6)), \
+        p7(::std::move(gmock_p7)), p8(::std::move(gmock_p8)), \
+        p9(::std::move(gmock_p9))
+
+// Defines the copy constructor
+#define GMOCK_INTERNAL_DEFN_COPY_AND_0_VALUE_PARAMS() \
+    {}  // Avoid https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82134
+#define GMOCK_INTERNAL_DEFN_COPY_AND_1_VALUE_PARAMS(...) = default;
+#define GMOCK_INTERNAL_DEFN_COPY_AND_2_VALUE_PARAMS(...) = default;
+#define GMOCK_INTERNAL_DEFN_COPY_AND_3_VALUE_PARAMS(...) = default;
+#define GMOCK_INTERNAL_DEFN_COPY_AND_4_VALUE_PARAMS(...) = default;
+#define GMOCK_INTERNAL_DEFN_COPY_AND_5_VALUE_PARAMS(...) = default;
+#define GMOCK_INTERNAL_DEFN_COPY_AND_6_VALUE_PARAMS(...) = default;
+#define GMOCK_INTERNAL_DEFN_COPY_AND_7_VALUE_PARAMS(...) = default;
+#define GMOCK_INTERNAL_DEFN_COPY_AND_8_VALUE_PARAMS(...) = default;
+#define GMOCK_INTERNAL_DEFN_COPY_AND_9_VALUE_PARAMS(...) = default;
+#define GMOCK_INTERNAL_DEFN_COPY_AND_10_VALUE_PARAMS(...) = default;
+
+// Declares the fields for storing the value parameters.
+#define GMOCK_INTERNAL_DEFN_AND_0_VALUE_PARAMS()
+#define GMOCK_INTERNAL_DEFN_AND_1_VALUE_PARAMS(p0) p0##_type p0;
+#define GMOCK_INTERNAL_DEFN_AND_2_VALUE_PARAMS(p0, p1) p0##_type p0; \
+    p1##_type p1;
+#define GMOCK_INTERNAL_DEFN_AND_3_VALUE_PARAMS(p0, p1, p2) p0##_type p0; \
+    p1##_type p1; p2##_type p2;
+#define GMOCK_INTERNAL_DEFN_AND_4_VALUE_PARAMS(p0, p1, p2, p3) p0##_type p0; \
+    p1##_type p1; p2##_type p2; p3##_type p3;
+#define GMOCK_INTERNAL_DEFN_AND_5_VALUE_PARAMS(p0, p1, p2, p3, \
+    p4) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; p4##_type p4;
+#define GMOCK_INTERNAL_DEFN_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, \
+    p5) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; p4##_type p4; \
+    p5##_type p5;
+#define GMOCK_INTERNAL_DEFN_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
+    p6) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; p4##_type p4; \
+    p5##_type p5; p6##_type p6;
+#define GMOCK_INTERNAL_DEFN_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; p4##_type p4; \
+    p5##_type p5; p6##_type p6; p7##_type p7;
+#define GMOCK_INTERNAL_DEFN_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7, p8) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; \
+    p4##_type p4; p5##_type p5; p6##_type p6; p7##_type p7; p8##_type p8;
+#define GMOCK_INTERNAL_DEFN_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7, p8, p9) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; \
+    p4##_type p4; p5##_type p5; p6##_type p6; p7##_type p7; p8##_type p8; \
+    p9##_type p9;
+
+// Lists the value parameters.
+#define GMOCK_INTERNAL_LIST_AND_0_VALUE_PARAMS()
+#define GMOCK_INTERNAL_LIST_AND_1_VALUE_PARAMS(p0) p0
+#define GMOCK_INTERNAL_LIST_AND_2_VALUE_PARAMS(p0, p1) p0, p1
+#define GMOCK_INTERNAL_LIST_AND_3_VALUE_PARAMS(p0, p1, p2) p0, p1, p2
+#define GMOCK_INTERNAL_LIST_AND_4_VALUE_PARAMS(p0, p1, p2, p3) p0, p1, p2, p3
+#define GMOCK_INTERNAL_LIST_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4) p0, p1, \
+    p2, p3, p4
+#define GMOCK_INTERNAL_LIST_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5) p0, \
+    p1, p2, p3, p4, p5
+#define GMOCK_INTERNAL_LIST_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
+    p6) p0, p1, p2, p3, p4, p5, p6
+#define GMOCK_INTERNAL_LIST_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7) p0, p1, p2, p3, p4, p5, p6, p7
+#define GMOCK_INTERNAL_LIST_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7, p8) p0, p1, p2, p3, p4, p5, p6, p7, p8
+#define GMOCK_INTERNAL_LIST_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7, p8, p9) p0, p1, p2, p3, p4, p5, p6, p7, p8, p9
+
+// Lists the value parameter types.
+#define GMOCK_INTERNAL_LIST_TYPE_AND_0_VALUE_PARAMS()
+#define GMOCK_INTERNAL_LIST_TYPE_AND_1_VALUE_PARAMS(p0) , p0##_type
+#define GMOCK_INTERNAL_LIST_TYPE_AND_2_VALUE_PARAMS(p0, p1) , p0##_type, \
+    p1##_type
+#define GMOCK_INTERNAL_LIST_TYPE_AND_3_VALUE_PARAMS(p0, p1, p2) , p0##_type, \
+    p1##_type, p2##_type
+#define GMOCK_INTERNAL_LIST_TYPE_AND_4_VALUE_PARAMS(p0, p1, p2, p3) , \
+    p0##_type, p1##_type, p2##_type, p3##_type
+#define GMOCK_INTERNAL_LIST_TYPE_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4) , \
+    p0##_type, p1##_type, p2##_type, p3##_type, p4##_type
+#define GMOCK_INTERNAL_LIST_TYPE_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5) , \
+    p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, p5##_type
+#define GMOCK_INTERNAL_LIST_TYPE_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
+    p6) , p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, p5##_type, \
+    p6##_type
+#define GMOCK_INTERNAL_LIST_TYPE_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
+    p6, p7) , p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, \
+    p5##_type, p6##_type, p7##_type
+#define GMOCK_INTERNAL_LIST_TYPE_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
+    p6, p7, p8) , p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, \
+    p5##_type, p6##_type, p7##_type, p8##_type
+#define GMOCK_INTERNAL_LIST_TYPE_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
+    p6, p7, p8, p9) , p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, \
+    p5##_type, p6##_type, p7##_type, p8##_type, p9##_type
+
+// Declares the value parameters.
+#define GMOCK_INTERNAL_DECL_AND_0_VALUE_PARAMS()
+#define GMOCK_INTERNAL_DECL_AND_1_VALUE_PARAMS(p0) p0##_type p0
+#define GMOCK_INTERNAL_DECL_AND_2_VALUE_PARAMS(p0, p1) p0##_type p0, \
+    p1##_type p1
+#define GMOCK_INTERNAL_DECL_AND_3_VALUE_PARAMS(p0, p1, p2) p0##_type p0, \
+    p1##_type p1, p2##_type p2
+#define GMOCK_INTERNAL_DECL_AND_4_VALUE_PARAMS(p0, p1, p2, p3) p0##_type p0, \
+    p1##_type p1, p2##_type p2, p3##_type p3
+#define GMOCK_INTERNAL_DECL_AND_5_VALUE_PARAMS(p0, p1, p2, p3, \
+    p4) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, p4##_type p4
+#define GMOCK_INTERNAL_DECL_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, \
+    p5) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, p4##_type p4, \
+    p5##_type p5
+#define GMOCK_INTERNAL_DECL_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
+    p6) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, p4##_type p4, \
+    p5##_type p5, p6##_type p6
+#define GMOCK_INTERNAL_DECL_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, p4##_type p4, \
+    p5##_type p5, p6##_type p6, p7##_type p7
+#define GMOCK_INTERNAL_DECL_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7, p8) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, \
+    p4##_type p4, p5##_type p5, p6##_type p6, p7##_type p7, p8##_type p8
+#define GMOCK_INTERNAL_DECL_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7, p8, p9) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, \
+    p4##_type p4, p5##_type p5, p6##_type p6, p7##_type p7, p8##_type p8, \
+    p9##_type p9
+
+// The suffix of the class template implementing the action template.
+#define GMOCK_INTERNAL_COUNT_AND_0_VALUE_PARAMS()
+#define GMOCK_INTERNAL_COUNT_AND_1_VALUE_PARAMS(p0) P
+#define GMOCK_INTERNAL_COUNT_AND_2_VALUE_PARAMS(p0, p1) P2
+#define GMOCK_INTERNAL_COUNT_AND_3_VALUE_PARAMS(p0, p1, p2) P3
+#define GMOCK_INTERNAL_COUNT_AND_4_VALUE_PARAMS(p0, p1, p2, p3) P4
+#define GMOCK_INTERNAL_COUNT_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4) P5
+#define GMOCK_INTERNAL_COUNT_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5) P6
+#define GMOCK_INTERNAL_COUNT_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6) P7
+#define GMOCK_INTERNAL_COUNT_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7) P8
+#define GMOCK_INTERNAL_COUNT_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7, p8) P9
+#define GMOCK_INTERNAL_COUNT_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
+    p7, p8, p9) P10
+
+// The name of the class template implementing the action template.
+#define GMOCK_ACTION_CLASS_(name, value_params)\
+    GTEST_CONCAT_TOKEN_(name##Action, GMOCK_INTERNAL_COUNT_##value_params)
+
+#define ACTION_TEMPLATE(name, template_params, value_params)                   \
+  template <GMOCK_INTERNAL_DECL_##template_params                              \
+            GMOCK_INTERNAL_DECL_TYPE_##value_params>                           \
+  class GMOCK_ACTION_CLASS_(name, value_params) {                              \
+   public:                                                                     \
+    explicit GMOCK_ACTION_CLASS_(name, value_params)(                          \
+        GMOCK_INTERNAL_DECL_##value_params)                                    \
+        GMOCK_PP_IF(GMOCK_PP_IS_EMPTY(GMOCK_INTERNAL_COUNT_##value_params),    \
+                    = default; ,                                               \
+                    : impl_(std::make_shared<gmock_Impl>(                      \
+                                GMOCK_INTERNAL_LIST_##value_params)) { })      \
+    GMOCK_ACTION_CLASS_(name, value_params)(                                   \
+        const GMOCK_ACTION_CLASS_(name, value_params)&) noexcept               \
+        GMOCK_INTERNAL_DEFN_COPY_##value_params                                \
+    GMOCK_ACTION_CLASS_(name, value_params)(                                   \
+        GMOCK_ACTION_CLASS_(name, value_params)&&) noexcept                    \
+        GMOCK_INTERNAL_DEFN_COPY_##value_params                                \
+    template <typename F>                                                      \
+    operator ::testing::Action<F>() const {                                    \
+      return GMOCK_PP_IF(                                                      \
+          GMOCK_PP_IS_EMPTY(GMOCK_INTERNAL_COUNT_##value_params),              \
+                      (::testing::internal::MakeAction<F, gmock_Impl>()),      \
+                      (::testing::internal::MakeAction<F>(impl_)));            \
+    }                                                                          \
+   private:                                                                    \
+    class gmock_Impl {                                                         \
+     public:                                                                   \
+      explicit gmock_Impl GMOCK_INTERNAL_INIT_##value_params {}                \
+      template <typename function_type, typename return_type,                  \
+                typename args_type, GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>         \
+      return_type gmock_PerformImpl(GMOCK_ACTION_ARG_TYPES_AND_NAMES_) const;  \
+      GMOCK_INTERNAL_DEFN_##value_params                                       \
+    };                                                                         \
+    GMOCK_PP_IF(GMOCK_PP_IS_EMPTY(GMOCK_INTERNAL_COUNT_##value_params),        \
+                , std::shared_ptr<const gmock_Impl> impl_;)                    \
+  };                                                                           \
+  template <GMOCK_INTERNAL_DECL_##template_params                              \
+            GMOCK_INTERNAL_DECL_TYPE_##value_params>                           \
+  GMOCK_ACTION_CLASS_(name, value_params)<                                     \
+      GMOCK_INTERNAL_LIST_##template_params                                    \
+      GMOCK_INTERNAL_LIST_TYPE_##value_params> name(                           \
+          GMOCK_INTERNAL_DECL_##value_params) GTEST_MUST_USE_RESULT_;          \
+  template <GMOCK_INTERNAL_DECL_##template_params                              \
+            GMOCK_INTERNAL_DECL_TYPE_##value_params>                           \
+  inline GMOCK_ACTION_CLASS_(name, value_params)<                              \
+      GMOCK_INTERNAL_LIST_##template_params                                    \
+      GMOCK_INTERNAL_LIST_TYPE_##value_params> name(                           \
+          GMOCK_INTERNAL_DECL_##value_params) {                                \
+    return GMOCK_ACTION_CLASS_(name, value_params)<                            \
+        GMOCK_INTERNAL_LIST_##template_params                                  \
+        GMOCK_INTERNAL_LIST_TYPE_##value_params>(                              \
+            GMOCK_INTERNAL_LIST_##value_params);                               \
+  }                                                                            \
+  template <GMOCK_INTERNAL_DECL_##template_params                              \
+            GMOCK_INTERNAL_DECL_TYPE_##value_params>                           \
+  template <typename function_type, typename return_type, typename args_type,  \
+            GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>                                 \
+  return_type GMOCK_ACTION_CLASS_(name, value_params)<                         \
+      GMOCK_INTERNAL_LIST_##template_params                                    \
+      GMOCK_INTERNAL_LIST_TYPE_##value_params>::gmock_Impl::gmock_PerformImpl( \
+          GMOCK_ACTION_ARG_TYPES_AND_NAMES_UNUSED_) const
+
+namespace testing {
+
+// The ACTION*() macros trigger warning C4100 (unreferenced formal
+// parameter) in MSVC with -W4.  Unfortunately they cannot be fixed in
+// the macro definition, as the warnings are generated when the macro
+// is expanded and macro expansion cannot contain #pragma.  Therefore
+// we suppress them here.
+#ifdef _MSC_VER
+# pragma warning(push)
+# pragma warning(disable:4100)
+#endif
+
+namespace internal {
+
+// internal::InvokeArgument - a helper for InvokeArgument action.
+// The basic overloads are provided here for generic functors.
+// Overloads for other custom-callables are provided in the
+// internal/custom/gmock-generated-actions.h header.
+template <typename F, typename... Args>
+auto InvokeArgument(F f, Args... args) -> decltype(f(args...)) {
+  return f(args...);
+}
+
+template <std::size_t index, typename... Params>
+struct InvokeArgumentAction {
+  template <typename... Args>
+  auto operator()(Args&&... args) const -> decltype(internal::InvokeArgument(
+      std::get<index>(std::forward_as_tuple(std::forward<Args>(args)...)),
+      std::declval<const Params&>()...)) {
+    internal::FlatTuple<Args&&...> args_tuple(FlatTupleConstructTag{},
+                                              std::forward<Args>(args)...);
+    return params.Apply([&](const Params&... unpacked_params) {
+      auto&& callable = args_tuple.template Get<index>();
+      return internal::InvokeArgument(
+          std::forward<decltype(callable)>(callable), unpacked_params...);
+    });
+  }
+
+  internal::FlatTuple<Params...> params;
+};
+
+}  // namespace internal
+
+// The InvokeArgument<N>(a1, a2, ..., a_k) action invokes the N-th
+// (0-based) argument, which must be a k-ary callable, of the mock
+// function, with arguments a1, a2, ..., a_k.
+//
+// Notes:
+//
+//   1. The arguments are passed by value by default.  If you need to
+//   pass an argument by reference, wrap it inside std::ref().  For
+//   example,
+//
+//     InvokeArgument<1>(5, string("Hello"), std::ref(foo))
+//
+//   passes 5 and string("Hello") by value, and passes foo by
+//   reference.
+//
+//   2. If the callable takes an argument by reference but std::ref() is
+//   not used, it will receive the reference to a copy of the value,
+//   instead of the original value.  For example, when the 0-th
+//   argument of the mock function takes a const string&, the action
+//
+//     InvokeArgument<0>(string("Hello"))
+//
+//   makes a copy of the temporary string("Hello") object and passes a
+//   reference of the copy, instead of the original temporary object,
+//   to the callable.  This makes it easy for a user to define an
+//   InvokeArgument action from temporary values and have it performed
+//   later.
+template <std::size_t index, typename... Params>
+internal::InvokeArgumentAction<index, typename std::decay<Params>::type...>
+InvokeArgument(Params&&... params) {
+  return {internal::FlatTuple<typename std::decay<Params>::type...>(
+      internal::FlatTupleConstructTag{}, std::forward<Params>(params)...)};
+}
+
+#ifdef _MSC_VER
+# pragma warning(pop)
+#endif
+
+}  // namespace testing
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
+// Copyright 2013, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// This file implements some matchers that depend on gmock-matchers.h.
+//
+// Note that tests are implemented in gmock-matchers_test.cc rather than
+// gmock-more-matchers-test.cc.
+
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_MATCHERS_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_MATCHERS_H_
+
+
+namespace testing {
+
+// Silence C4100 (unreferenced formal
+// parameter) for MSVC
+#ifdef _MSC_VER
+# pragma warning(push)
+# pragma warning(disable:4100)
+#if (_MSC_VER == 1900)
+// and silence C4800 (C4800: 'int *const ': forcing value
+// to bool 'true' or 'false') for MSVC 14
+# pragma warning(disable:4800)
+  #endif
+#endif
+
+// Defines a matcher that matches an empty container. The container must
+// support both size() and empty(), which all STL-like containers provide.
+MATCHER(IsEmpty, negation ? "isn't empty" : "is empty") {
+  if (arg.empty()) {
+    return true;
+  }
+  *result_listener << "whose size is " << arg.size();
+  return false;
+}
+
+// Define a matcher that matches a value that evaluates in boolean
+// context to true.  Useful for types that define "explicit operator
+// bool" operators and so can't be compared for equality with true
+// and false.
+MATCHER(IsTrue, negation ? "is false" : "is true") {
+  return static_cast<bool>(arg);
+}
+
+// Define a matcher that matches a value that evaluates in boolean
+// context to false.  Useful for types that define "explicit operator
+// bool" operators and so can't be compared for equality with true
+// and false.
+MATCHER(IsFalse, negation ? "is true" : "is false") {
+  return !static_cast<bool>(arg);
+}
+
+#ifdef _MSC_VER
+# pragma warning(pop)
+#endif
+
+
+}  // namespace testing
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_MATCHERS_H_
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Implements class templates NiceMock, NaggyMock, and StrictMock.
+//
+// Given a mock class MockFoo that is created using Google Mock,
+// NiceMock<MockFoo> is a subclass of MockFoo that allows
+// uninteresting calls (i.e. calls to mock methods that have no
+// EXPECT_CALL specs), NaggyMock<MockFoo> is a subclass of MockFoo
+// that prints a warning when an uninteresting call occurs, and
+// StrictMock<MockFoo> is a subclass of MockFoo that treats all
+// uninteresting calls as errors.
+//
+// Currently a mock is naggy by default, so MockFoo and
+// NaggyMock<MockFoo> behave like the same.  However, we will soon
+// switch the default behavior of mocks to be nice, as that in general
+// leads to more maintainable tests.  When that happens, MockFoo will
+// stop behaving like NaggyMock<MockFoo> and start behaving like
+// NiceMock<MockFoo>.
+//
+// NiceMock, NaggyMock, and StrictMock "inherit" the constructors of
+// their respective base class.  Therefore you can write
+// NiceMock<MockFoo>(5, "a") to construct a nice mock where MockFoo
+// has a constructor that accepts (int, const char*), for example.
+//
+// A known limitation is that NiceMock<MockFoo>, NaggyMock<MockFoo>,
+// and StrictMock<MockFoo> only works for mock methods defined using
+// the MOCK_METHOD* family of macros DIRECTLY in the MockFoo class.
+// If a mock method is defined in a base class of MockFoo, the "nice"
+// or "strict" modifier may not affect it, depending on the compiler.
+// In particular, nesting NiceMock, NaggyMock, and StrictMock is NOT
+// supported.
+
+// GOOGLETEST_CM0002 DO NOT DELETE
+
+#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_NICE_STRICT_H_
+#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_NICE_STRICT_H_
+
+#include <type_traits>
+
+
+namespace testing {
+template <class MockClass>
+class NiceMock;
+template <class MockClass>
+class NaggyMock;
+template <class MockClass>
+class StrictMock;
+
+namespace internal {
+template <typename T>
+std::true_type StrictnessModifierProbe(const NiceMock<T>&);
+template <typename T>
+std::true_type StrictnessModifierProbe(const NaggyMock<T>&);
+template <typename T>
+std::true_type StrictnessModifierProbe(const StrictMock<T>&);
+std::false_type StrictnessModifierProbe(...);
+
+template <typename T>
+constexpr bool HasStrictnessModifier() {
+  return decltype(StrictnessModifierProbe(std::declval<const T&>()))::value;
+}
+
+// Base classes that register and deregister with testing::Mock to alter the
+// default behavior around uninteresting calls. Inheriting from one of these
+// classes first and then MockClass ensures the MockClass constructor is run
+// after registration, and that the MockClass destructor runs before
+// deregistration. This guarantees that MockClass's constructor and destructor
+// run with the same level of strictness as its instance methods.
+
+#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW && \
+    (defined(_MSC_VER) || defined(__clang__))
+// We need to mark these classes with this declspec to ensure that
+// the empty base class optimization is performed.
+#define GTEST_INTERNAL_EMPTY_BASE_CLASS __declspec(empty_bases)
+#else
+#define GTEST_INTERNAL_EMPTY_BASE_CLASS
+#endif
+
+template <typename Base>
+class NiceMockImpl {
+ public:
+  NiceMockImpl() { ::testing::Mock::AllowUninterestingCalls(this); }
+
+  ~NiceMockImpl() { ::testing::Mock::UnregisterCallReaction(this); }
+};
+
+template <typename Base>
+class NaggyMockImpl {
+ public:
+  NaggyMockImpl() { ::testing::Mock::WarnUninterestingCalls(this); }
+
+  ~NaggyMockImpl() { ::testing::Mock::UnregisterCallReaction(this); }
+};
+
+template <typename Base>
+class StrictMockImpl {
+ public:
+  StrictMockImpl() { ::testing::Mock::FailUninterestingCalls(this); }
+
+  ~StrictMockImpl() { ::testing::Mock::UnregisterCallReaction(this); }
+};
+
+}  // namespace internal
+
+template <class MockClass>
+class GTEST_INTERNAL_EMPTY_BASE_CLASS NiceMock
+    : private internal::NiceMockImpl<MockClass>,
+      public MockClass {
+ public:
+  static_assert(!internal::HasStrictnessModifier<MockClass>(),
+                "Can't apply NiceMock to a class hierarchy that already has a "
+                "strictness modifier. See "
+                "https://google.github.io/googletest/"
+                "gmock_cook_book.html#NiceStrictNaggy");
+  NiceMock() : MockClass() {
+    static_assert(sizeof(*this) == sizeof(MockClass),
+                  "The impl subclass shouldn't introduce any padding");
+  }
+
+  // Ideally, we would inherit base class's constructors through a using
+  // declaration, which would preserve their visibility. However, many existing
+  // tests rely on the fact that current implementation reexports protected
+  // constructors as public. These tests would need to be cleaned up first.
+
+  // Single argument constructor is special-cased so that it can be
+  // made explicit.
+  template <typename A>
+  explicit NiceMock(A&& arg) : MockClass(std::forward<A>(arg)) {
+    static_assert(sizeof(*this) == sizeof(MockClass),
+                  "The impl subclass shouldn't introduce any padding");
+  }
+
+  template <typename TArg1, typename TArg2, typename... An>
+  NiceMock(TArg1&& arg1, TArg2&& arg2, An&&... args)
+      : MockClass(std::forward<TArg1>(arg1), std::forward<TArg2>(arg2),
+                  std::forward<An>(args)...) {
+    static_assert(sizeof(*this) == sizeof(MockClass),
+                  "The impl subclass shouldn't introduce any padding");
+  }
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(NiceMock);
+};
+
+template <class MockClass>
+class GTEST_INTERNAL_EMPTY_BASE_CLASS NaggyMock
+    : private internal::NaggyMockImpl<MockClass>,
+      public MockClass {
+  static_assert(!internal::HasStrictnessModifier<MockClass>(),
+                "Can't apply NaggyMock to a class hierarchy that already has a "
+                "strictness modifier. See "
+                "https://google.github.io/googletest/"
+                "gmock_cook_book.html#NiceStrictNaggy");
+
+ public:
+  NaggyMock() : MockClass() {
+    static_assert(sizeof(*this) == sizeof(MockClass),
+                  "The impl subclass shouldn't introduce any padding");
+  }
+
+  // Ideally, we would inherit base class's constructors through a using
+  // declaration, which would preserve their visibility. However, many existing
+  // tests rely on the fact that current implementation reexports protected
+  // constructors as public. These tests would need to be cleaned up first.
+
+  // Single argument constructor is special-cased so that it can be
+  // made explicit.
+  template <typename A>
+  explicit NaggyMock(A&& arg) : MockClass(std::forward<A>(arg)) {
+    static_assert(sizeof(*this) == sizeof(MockClass),
+                  "The impl subclass shouldn't introduce any padding");
+  }
+
+  template <typename TArg1, typename TArg2, typename... An>
+  NaggyMock(TArg1&& arg1, TArg2&& arg2, An&&... args)
+      : MockClass(std::forward<TArg1>(arg1), std::forward<TArg2>(arg2),
+                  std::forward<An>(args)...) {
+    static_assert(sizeof(*this) == sizeof(MockClass),
+                  "The impl subclass shouldn't introduce any padding");
+  }
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(NaggyMock);
+};
+
+template <class MockClass>
+class GTEST_INTERNAL_EMPTY_BASE_CLASS StrictMock
+    : private internal::StrictMockImpl<MockClass>,
+      public MockClass {
+ public:
+  static_assert(
+      !internal::HasStrictnessModifier<MockClass>(),
+      "Can't apply StrictMock to a class hierarchy that already has a "
+      "strictness modifier. See "
+      "https://google.github.io/googletest/"
+      "gmock_cook_book.html#NiceStrictNaggy");
+  StrictMock() : MockClass() {
+    static_assert(sizeof(*this) == sizeof(MockClass),
+                  "The impl subclass shouldn't introduce any padding");
+  }
+
+  // Ideally, we would inherit base class's constructors through a using
+  // declaration, which would preserve their visibility. However, many existing
+  // tests rely on the fact that current implementation reexports protected
+  // constructors as public. These tests would need to be cleaned up first.
+
+  // Single argument constructor is special-cased so that it can be
+  // made explicit.
+  template <typename A>
+  explicit StrictMock(A&& arg) : MockClass(std::forward<A>(arg)) {
+    static_assert(sizeof(*this) == sizeof(MockClass),
+                  "The impl subclass shouldn't introduce any padding");
+  }
+
+  template <typename TArg1, typename TArg2, typename... An>
+  StrictMock(TArg1&& arg1, TArg2&& arg2, An&&... args)
+      : MockClass(std::forward<TArg1>(arg1), std::forward<TArg2>(arg2),
+                  std::forward<An>(args)...) {
+    static_assert(sizeof(*this) == sizeof(MockClass),
+                  "The impl subclass shouldn't introduce any padding");
+  }
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(StrictMock);
+};
+
+#undef GTEST_INTERNAL_EMPTY_BASE_CLASS
+
+}  // namespace testing
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_NICE_STRICT_H_
+
+namespace testing {
+
+// Declares Google Mock flags that we want a user to use programmatically.
+GMOCK_DECLARE_bool_(catch_leaked_mocks);
+GMOCK_DECLARE_string_(verbose);
+GMOCK_DECLARE_int32_(default_mock_behavior);
+
+// Initializes Google Mock.  This must be called before running the
+// tests.  In particular, it parses the command line for the flags
+// that Google Mock recognizes.  Whenever a Google Mock flag is seen,
+// it is removed from argv, and *argc is decremented.
+//
+// No value is returned.  Instead, the Google Mock flag variables are
+// updated.
+//
+// Since Google Test is needed for Google Mock to work, this function
+// also initializes Google Test and parses its flags, if that hasn't
+// been done.
+GTEST_API_ void InitGoogleMock(int* argc, char** argv);
+
+// This overloaded version can be used in Windows programs compiled in
+// UNICODE mode.
+GTEST_API_ void InitGoogleMock(int* argc, wchar_t** argv);
+
+// This overloaded version can be used on Arduino/embedded platforms where
+// there is no argc/argv.
+GTEST_API_ void InitGoogleMock();
+
+}  // namespace testing
+
+#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_H_
diff --git a/3rdparty/fmt/test/gtest/gtest/gtest-spi.h b/3rdparty/fmt/test/gtest/gtest/gtest-spi.h
new file mode 100644
index 00000000..eacef446
--- /dev/null
+++ b/3rdparty/fmt/test/gtest/gtest/gtest-spi.h
@@ -0,0 +1,238 @@
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//
+// Utilities for testing Google Test itself and code that uses Google Test
+// (e.g. frameworks built on top of Google Test).
+
+// GOOGLETEST_CM0004 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
+#define GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
+
+#include "gtest/gtest.h"
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
+/* class A needs to have dll-interface to be used by clients of class B */)
+
+namespace testing {
+
+// This helper class can be used to mock out Google Test failure reporting
+// so that we can test Google Test or code that builds on Google Test.
+//
+// An object of this class appends a TestPartResult object to the
+// TestPartResultArray object given in the constructor whenever a Google Test
+// failure is reported. It can either intercept only failures that are
+// generated in the same thread that created this object or it can intercept
+// all generated failures. The scope of this mock object can be controlled with
+// the second argument to the two arguments constructor.
+class GTEST_API_ ScopedFakeTestPartResultReporter
+    : public TestPartResultReporterInterface {
+ public:
+  // The two possible mocking modes of this object.
+  enum InterceptMode {
+    INTERCEPT_ONLY_CURRENT_THREAD,  // Intercepts only thread local failures.
+    INTERCEPT_ALL_THREADS           // Intercepts all failures.
+  };
+
+  // The c'tor sets this object as the test part result reporter used
+  // by Google Test.  The 'result' parameter specifies where to report the
+  // results. This reporter will only catch failures generated in the current
+  // thread. DEPRECATED
+  explicit ScopedFakeTestPartResultReporter(TestPartResultArray* result);
+
+  // Same as above, but you can choose the interception scope of this object.
+  ScopedFakeTestPartResultReporter(InterceptMode intercept_mode,
+                                   TestPartResultArray* result);
+
+  // The d'tor restores the previous test part result reporter.
+  ~ScopedFakeTestPartResultReporter() override;
+
+  // Appends the TestPartResult object to the TestPartResultArray
+  // received in the constructor.
+  //
+  // This method is from the TestPartResultReporterInterface
+  // interface.
+  void ReportTestPartResult(const TestPartResult& result) override;
+
+ private:
+  void Init();
+
+  const InterceptMode intercept_mode_;
+  TestPartResultReporterInterface* old_reporter_;
+  TestPartResultArray* const result_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedFakeTestPartResultReporter);
+};
+
+namespace internal {
+
+// A helper class for implementing EXPECT_FATAL_FAILURE() and
+// EXPECT_NONFATAL_FAILURE().  Its destructor verifies that the given
+// TestPartResultArray contains exactly one failure that has the given
+// type and contains the given substring.  If that's not the case, a
+// non-fatal failure will be generated.
+class GTEST_API_ SingleFailureChecker {
+ public:
+  // The constructor remembers the arguments.
+  SingleFailureChecker(const TestPartResultArray* results,
+                       TestPartResult::Type type, const std::string& substr);
+  ~SingleFailureChecker();
+ private:
+  const TestPartResultArray* const results_;
+  const TestPartResult::Type type_;
+  const std::string substr_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(SingleFailureChecker);
+};
+
+}  // namespace internal
+
+}  // namespace testing
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
+
+// A set of macros for testing Google Test assertions or code that's expected
+// to generate Google Test fatal failures.  It verifies that the given
+// statement will cause exactly one fatal Google Test failure with 'substr'
+// being part of the failure message.
+//
+// There are two different versions of this macro. EXPECT_FATAL_FAILURE only
+// affects and considers failures generated in the current thread and
+// EXPECT_FATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
+//
+// The verification of the assertion is done correctly even when the statement
+// throws an exception or aborts the current function.
+//
+// Known restrictions:
+//   - 'statement' cannot reference local non-static variables or
+//     non-static members of the current object.
+//   - 'statement' cannot return a value.
+//   - You cannot stream a failure message to this macro.
+//
+// Note that even though the implementations of the following two
+// macros are much alike, we cannot refactor them to use a common
+// helper macro, due to some peculiarity in how the preprocessor
+// works.  The AcceptsMacroThatExpandsToUnprotectedComma test in
+// gtest_unittest.cc will fail to compile if we do that.
+#define EXPECT_FATAL_FAILURE(statement, substr) \
+  do { \
+    class GTestExpectFatalFailureHelper {\
+     public:\
+      static void Execute() { statement; }\
+    };\
+    ::testing::TestPartResultArray gtest_failures;\
+    ::testing::internal::SingleFailureChecker gtest_checker(\
+        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
+    {\
+      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
+          ::testing::ScopedFakeTestPartResultReporter:: \
+          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
+      GTestExpectFatalFailureHelper::Execute();\
+    }\
+  } while (::testing::internal::AlwaysFalse())
+
+#define EXPECT_FATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
+  do { \
+    class GTestExpectFatalFailureHelper {\
+     public:\
+      static void Execute() { statement; }\
+    };\
+    ::testing::TestPartResultArray gtest_failures;\
+    ::testing::internal::SingleFailureChecker gtest_checker(\
+        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
+    {\
+      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
+          ::testing::ScopedFakeTestPartResultReporter:: \
+          INTERCEPT_ALL_THREADS, &gtest_failures);\
+      GTestExpectFatalFailureHelper::Execute();\
+    }\
+  } while (::testing::internal::AlwaysFalse())
+
+// A macro for testing Google Test assertions or code that's expected to
+// generate Google Test non-fatal failures.  It asserts that the given
+// statement will cause exactly one non-fatal Google Test failure with 'substr'
+// being part of the failure message.
+//
+// There are two different versions of this macro. EXPECT_NONFATAL_FAILURE only
+// affects and considers failures generated in the current thread and
+// EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
+//
+// 'statement' is allowed to reference local variables and members of
+// the current object.
+//
+// The verification of the assertion is done correctly even when the statement
+// throws an exception or aborts the current function.
+//
+// Known restrictions:
+//   - You cannot stream a failure message to this macro.
+//
+// Note that even though the implementations of the following two
+// macros are much alike, we cannot refactor them to use a common
+// helper macro, due to some peculiarity in how the preprocessor
+// works.  If we do that, the code won't compile when the user gives
+// EXPECT_NONFATAL_FAILURE() a statement that contains a macro that
+// expands to code containing an unprotected comma.  The
+// AcceptsMacroThatExpandsToUnprotectedComma test in gtest_unittest.cc
+// catches that.
+//
+// For the same reason, we have to write
+//   if (::testing::internal::AlwaysTrue()) { statement; }
+// instead of
+//   GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
+// to avoid an MSVC warning on unreachable code.
+#define EXPECT_NONFATAL_FAILURE(statement, substr) \
+  do {\
+    ::testing::TestPartResultArray gtest_failures;\
+    ::testing::internal::SingleFailureChecker gtest_checker(\
+        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
+        (substr));\
+    {\
+      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
+          ::testing::ScopedFakeTestPartResultReporter:: \
+          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
+      if (::testing::internal::AlwaysTrue()) { statement; }\
+    }\
+  } while (::testing::internal::AlwaysFalse())
+
+#define EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
+  do {\
+    ::testing::TestPartResultArray gtest_failures;\
+    ::testing::internal::SingleFailureChecker gtest_checker(\
+        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
+        (substr));\
+    {\
+      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
+          ::testing::ScopedFakeTestPartResultReporter::INTERCEPT_ALL_THREADS, \
+          &gtest_failures);\
+      if (::testing::internal::AlwaysTrue()) { statement; }\
+    }\
+  } while (::testing::internal::AlwaysFalse())
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
diff --git a/3rdparty/fmt/test/gtest/gtest/gtest.h b/3rdparty/fmt/test/gtest/gtest/gtest.h
new file mode 100644
index 00000000..55a31d0a
--- /dev/null
+++ b/3rdparty/fmt/test/gtest/gtest/gtest.h
@@ -0,0 +1,12398 @@
+// Copyright 2005, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//
+// The Google C++ Testing and Mocking Framework (Google Test)
+//
+// This header file defines the public API for Google Test.  It should be
+// included by any test program that uses Google Test.
+//
+// IMPORTANT NOTE: Due to limitation of the C++ language, we have to
+// leave some internal implementation details in this header file.
+// They are clearly marked by comments like this:
+//
+//   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+//
+// Such code is NOT meant to be used by a user directly, and is subject
+// to CHANGE WITHOUT NOTICE.  Therefore DO NOT DEPEND ON IT in a user
+// program!
+//
+// Acknowledgment: Google Test borrowed the idea of automatic test
+// registration from Barthelemy Dagenais' (barthelemy@prologique.com)
+// easyUnit framework.
+
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_H_
+#define GOOGLETEST_INCLUDE_GTEST_GTEST_H_
+
+#include <cstddef>
+#include <limits>
+#include <memory>
+#include <ostream>
+#include <type_traits>
+#include <vector>
+
+// Copyright 2005, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// The Google C++ Testing and Mocking Framework (Google Test)
+//
+// This header file declares functions and macros used internally by
+// Google Test.  They are subject to change without notice.
+
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
+#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
+
+// Copyright 2005, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Low-level types and utilities for porting Google Test to various
+// platforms.  All macros ending with _ and symbols defined in an
+// internal namespace are subject to change without notice.  Code
+// outside Google Test MUST NOT USE THEM DIRECTLY.  Macros that don't
+// end with _ are part of Google Test's public API and can be used by
+// code outside Google Test.
+//
+// This file is fundamental to Google Test.  All other Google Test source
+// files are expected to #include this.  Therefore, it cannot #include
+// any other Google Test header.
+
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
+#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
+
+// Environment-describing macros
+// -----------------------------
+//
+// Google Test can be used in many different environments.  Macros in
+// this section tell Google Test what kind of environment it is being
+// used in, such that Google Test can provide environment-specific
+// features and implementations.
+//
+// Google Test tries to automatically detect the properties of its
+// environment, so users usually don't need to worry about these
+// macros.  However, the automatic detection is not perfect.
+// Sometimes it's necessary for a user to define some of the following
+// macros in the build script to override Google Test's decisions.
+//
+// If the user doesn't define a macro in the list, Google Test will
+// provide a default definition.  After this header is #included, all
+// macros in this list will be defined to either 1 or 0.
+//
+// Notes to maintainers:
+//   - Each macro here is a user-tweakable knob; do not grow the list
+//     lightly.
+//   - Use #if to key off these macros.  Don't use #ifdef or "#if
+//     defined(...)", which will not work as these macros are ALWAYS
+//     defined.
+//
+//   GTEST_HAS_CLONE          - Define it to 1/0 to indicate that clone(2)
+//                              is/isn't available.
+//   GTEST_HAS_EXCEPTIONS     - Define it to 1/0 to indicate that exceptions
+//                              are enabled.
+//   GTEST_HAS_POSIX_RE       - Define it to 1/0 to indicate that POSIX regular
+//                              expressions are/aren't available.
+//   GTEST_HAS_PTHREAD        - Define it to 1/0 to indicate that <pthread.h>
+//                              is/isn't available.
+//   GTEST_HAS_RTTI           - Define it to 1/0 to indicate that RTTI is/isn't
+//                              enabled.
+//   GTEST_HAS_STD_WSTRING    - Define it to 1/0 to indicate that
+//                              std::wstring does/doesn't work (Google Test can
+//                              be used where std::wstring is unavailable).
+//   GTEST_HAS_SEH            - Define it to 1/0 to indicate whether the
+//                              compiler supports Microsoft's "Structured
+//                              Exception Handling".
+//   GTEST_HAS_STREAM_REDIRECTION
+//                            - Define it to 1/0 to indicate whether the
+//                              platform supports I/O stream redirection using
+//                              dup() and dup2().
+//   GTEST_LINKED_AS_SHARED_LIBRARY
+//                            - Define to 1 when compiling tests that use
+//                              Google Test as a shared library (known as
+//                              DLL on Windows).
+//   GTEST_CREATE_SHARED_LIBRARY
+//                            - Define to 1 when compiling Google Test itself
+//                              as a shared library.
+//   GTEST_DEFAULT_DEATH_TEST_STYLE
+//                            - The default value of --gtest_death_test_style.
+//                              The legacy default has been "fast" in the open
+//                              source version since 2008. The recommended value
+//                              is "threadsafe", and can be set in
+//                              custom/gtest-port.h.
+
+// Platform-indicating macros
+// --------------------------
+//
+// Macros indicating the platform on which Google Test is being used
+// (a macro is defined to 1 if compiled on the given platform;
+// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
+// defines these macros automatically.  Code outside Google Test MUST
+// NOT define them.
+//
+//   GTEST_OS_AIX      - IBM AIX
+//   GTEST_OS_CYGWIN   - Cygwin
+//   GTEST_OS_DRAGONFLY - DragonFlyBSD
+//   GTEST_OS_FREEBSD  - FreeBSD
+//   GTEST_OS_FUCHSIA  - Fuchsia
+//   GTEST_OS_GNU_KFREEBSD - GNU/kFreeBSD
+//   GTEST_OS_HAIKU    - Haiku
+//   GTEST_OS_HPUX     - HP-UX
+//   GTEST_OS_LINUX    - Linux
+//     GTEST_OS_LINUX_ANDROID - Google Android
+//   GTEST_OS_MAC      - Mac OS X
+//     GTEST_OS_IOS    - iOS
+//   GTEST_OS_NACL     - Google Native Client (NaCl)
+//   GTEST_OS_NETBSD   - NetBSD
+//   GTEST_OS_OPENBSD  - OpenBSD
+//   GTEST_OS_OS2      - OS/2
+//   GTEST_OS_QNX      - QNX
+//   GTEST_OS_SOLARIS  - Sun Solaris
+//   GTEST_OS_WINDOWS  - Windows (Desktop, MinGW, or Mobile)
+//     GTEST_OS_WINDOWS_DESKTOP  - Windows Desktop
+//     GTEST_OS_WINDOWS_MINGW    - MinGW
+//     GTEST_OS_WINDOWS_MOBILE   - Windows Mobile
+//     GTEST_OS_WINDOWS_PHONE    - Windows Phone
+//     GTEST_OS_WINDOWS_RT       - Windows Store App/WinRT
+//   GTEST_OS_ZOS      - z/OS
+//
+// Among the platforms, Cygwin, Linux, Mac OS X, and Windows have the
+// most stable support.  Since core members of the Google Test project
+// don't have access to other platforms, support for them may be less
+// stable.  If you notice any problems on your platform, please notify
+// googletestframework@googlegroups.com (patches for fixing them are
+// even more welcome!).
+//
+// It is possible that none of the GTEST_OS_* macros are defined.
+
+// Feature-indicating macros
+// -------------------------
+//
+// Macros indicating which Google Test features are available (a macro
+// is defined to 1 if the corresponding feature is supported;
+// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
+// defines these macros automatically.  Code outside Google Test MUST
+// NOT define them.
+//
+// These macros are public so that portable tests can be written.
+// Such tests typically surround code using a feature with an #if
+// which controls that code.  For example:
+//
+// #if GTEST_HAS_DEATH_TEST
+//   EXPECT_DEATH(DoSomethingDeadly());
+// #endif
+//
+//   GTEST_HAS_DEATH_TEST   - death tests
+//   GTEST_HAS_TYPED_TEST   - typed tests
+//   GTEST_HAS_TYPED_TEST_P - type-parameterized tests
+//   GTEST_IS_THREADSAFE    - Google Test is thread-safe.
+//   GOOGLETEST_CM0007 DO NOT DELETE
+//   GTEST_USES_POSIX_RE    - enhanced POSIX regex is used. Do not confuse with
+//                            GTEST_HAS_POSIX_RE (see above) which users can
+//                            define themselves.
+//   GTEST_USES_SIMPLE_RE   - our own simple regex is used;
+//                            the above RE\b(s) are mutually exclusive.
+
+// Misc public macros
+// ------------------
+//
+//   GTEST_FLAG(flag_name)  - references the variable corresponding to
+//                            the given Google Test flag.
+
+// Internal utilities
+// ------------------
+//
+// The following macros and utilities are for Google Test's INTERNAL
+// use only.  Code outside Google Test MUST NOT USE THEM DIRECTLY.
+//
+// Macros for basic C++ coding:
+//   GTEST_AMBIGUOUS_ELSE_BLOCKER_ - for disabling a gcc warning.
+//   GTEST_ATTRIBUTE_UNUSED_  - declares that a class' instances or a
+//                              variable don't have to be used.
+//   GTEST_DISALLOW_ASSIGN_   - disables copy operator=.
+//   GTEST_DISALLOW_COPY_AND_ASSIGN_ - disables copy ctor and operator=.
+//   GTEST_DISALLOW_MOVE_ASSIGN_   - disables move operator=.
+//   GTEST_DISALLOW_MOVE_AND_ASSIGN_ - disables move ctor and operator=.
+//   GTEST_MUST_USE_RESULT_   - declares that a function's result must be used.
+//   GTEST_INTENTIONAL_CONST_COND_PUSH_ - start code section where MSVC C4127 is
+//                                        suppressed (constant conditional).
+//   GTEST_INTENTIONAL_CONST_COND_POP_  - finish code section where MSVC C4127
+//                                        is suppressed.
+//   GTEST_INTERNAL_HAS_ANY - for enabling UniversalPrinter<std::any> or
+//                            UniversalPrinter<absl::any> specializations.
+//   GTEST_INTERNAL_HAS_OPTIONAL - for enabling UniversalPrinter<std::optional>
+//   or
+//                                 UniversalPrinter<absl::optional>
+//                                 specializations.
+//   GTEST_INTERNAL_HAS_STRING_VIEW - for enabling Matcher<std::string_view> or
+//                                    Matcher<absl::string_view>
+//                                    specializations.
+//   GTEST_INTERNAL_HAS_VARIANT - for enabling UniversalPrinter<std::variant> or
+//                                UniversalPrinter<absl::variant>
+//                                specializations.
+//
+// Synchronization:
+//   Mutex, MutexLock, ThreadLocal, GetThreadCount()
+//                            - synchronization primitives.
+//
+// Regular expressions:
+//   RE             - a simple regular expression class using the POSIX
+//                    Extended Regular Expression syntax on UNIX-like platforms
+//                    GOOGLETEST_CM0008 DO NOT DELETE
+//                    or a reduced regular exception syntax on other
+//                    platforms, including Windows.
+// Logging:
+//   GTEST_LOG_()   - logs messages at the specified severity level.
+//   LogToStderr()  - directs all log messages to stderr.
+//   FlushInfoLog() - flushes informational log messages.
+//
+// Stdout and stderr capturing:
+//   CaptureStdout()     - starts capturing stdout.
+//   GetCapturedStdout() - stops capturing stdout and returns the captured
+//                         string.
+//   CaptureStderr()     - starts capturing stderr.
+//   GetCapturedStderr() - stops capturing stderr and returns the captured
+//                         string.
+//
+// Integer types:
+//   TypeWithSize   - maps an integer to a int type.
+//   TimeInMillis   - integers of known sizes.
+//   BiggestInt     - the biggest signed integer type.
+//
+// Command-line utilities:
+//   GTEST_DECLARE_*()  - declares a flag.
+//   GTEST_DEFINE_*()   - defines a flag.
+//   GetInjectableArgvs() - returns the command line as a vector of strings.
+//
+// Environment variable utilities:
+//   GetEnv()             - gets the value of an environment variable.
+//   BoolFromGTestEnv()   - parses a bool environment variable.
+//   Int32FromGTestEnv()  - parses an int32_t environment variable.
+//   StringFromGTestEnv() - parses a string environment variable.
+//
+// Deprecation warnings:
+//   GTEST_INTERNAL_DEPRECATED(message) - attribute marking a function as
+//                                        deprecated; calling a marked function
+//                                        should generate a compiler warning
+
+#include <ctype.h>   // for isspace, etc
+#include <stddef.h>  // for ptrdiff_t
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <cerrno>
+#include <cstdint>
+#include <limits>
+#include <type_traits>
+
+#ifndef _WIN32_WCE
+# include <sys/types.h>
+# include <sys/stat.h>
+#endif  // !_WIN32_WCE
+
+#if defined __APPLE__
+# include <AvailabilityMacros.h>
+# include <TargetConditionals.h>
+#endif
+
+#include <iostream>  // NOLINT
+#include <locale>
+#include <memory>
+#include <string>  // NOLINT
+#include <tuple>
+#include <vector>  // NOLINT
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Injection point for custom user configurations. See README for details
+//
+// ** Custom implementation starts here **
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
+#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// The Google C++ Testing and Mocking Framework (Google Test)
+//
+// This header file defines the GTEST_OS_* macro.
+// It is separate from gtest-port.h so that custom/gtest-port.h can include it.
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
+#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
+
+// Determines the platform on which Google Test is compiled.
+#ifdef __CYGWIN__
+# define GTEST_OS_CYGWIN 1
+# elif defined(__MINGW__) || defined(__MINGW32__) || defined(__MINGW64__)
+#  define GTEST_OS_WINDOWS_MINGW 1
+#  define GTEST_OS_WINDOWS 1
+#elif defined _WIN32
+# define GTEST_OS_WINDOWS 1
+# ifdef _WIN32_WCE
+#  define GTEST_OS_WINDOWS_MOBILE 1
+# elif defined(WINAPI_FAMILY)
+#  include <winapifamily.h>
+#  if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
+#   define GTEST_OS_WINDOWS_DESKTOP 1
+#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE_APP)
+#   define GTEST_OS_WINDOWS_PHONE 1
+#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
+#   define GTEST_OS_WINDOWS_RT 1
+#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_TV_TITLE)
+#   define GTEST_OS_WINDOWS_PHONE 1
+#   define GTEST_OS_WINDOWS_TV_TITLE 1
+#  else
+    // WINAPI_FAMILY defined but no known partition matched.
+    // Default to desktop.
+#   define GTEST_OS_WINDOWS_DESKTOP 1
+#  endif
+# else
+#  define GTEST_OS_WINDOWS_DESKTOP 1
+# endif  // _WIN32_WCE
+#elif defined __OS2__
+# define GTEST_OS_OS2 1
+#elif defined __APPLE__
+# define GTEST_OS_MAC 1
+# include <TargetConditionals.h>
+# if TARGET_OS_IPHONE
+#  define GTEST_OS_IOS 1
+# endif
+#elif defined __DragonFly__
+# define GTEST_OS_DRAGONFLY 1
+#elif defined __FreeBSD__
+# define GTEST_OS_FREEBSD 1
+#elif defined __Fuchsia__
+# define GTEST_OS_FUCHSIA 1
+#elif defined(__GLIBC__) && defined(__FreeBSD_kernel__)
+# define GTEST_OS_GNU_KFREEBSD 1
+#elif defined __linux__
+# define GTEST_OS_LINUX 1
+# if defined __ANDROID__
+#  define GTEST_OS_LINUX_ANDROID 1
+# endif
+#elif defined __MVS__
+# define GTEST_OS_ZOS 1
+#elif defined(__sun) && defined(__SVR4)
+# define GTEST_OS_SOLARIS 1
+#elif defined(_AIX)
+# define GTEST_OS_AIX 1
+#elif defined(__hpux)
+# define GTEST_OS_HPUX 1
+#elif defined __native_client__
+# define GTEST_OS_NACL 1
+#elif defined __NetBSD__
+# define GTEST_OS_NETBSD 1
+#elif defined __OpenBSD__
+# define GTEST_OS_OPENBSD 1
+#elif defined __QNX__
+# define GTEST_OS_QNX 1
+#elif defined(__HAIKU__)
+#define GTEST_OS_HAIKU 1
+#elif defined ESP8266
+#define GTEST_OS_ESP8266 1
+#elif defined ESP32
+#define GTEST_OS_ESP32 1
+#elif defined(__XTENSA__)
+#define GTEST_OS_XTENSA 1
+#endif  // __CYGWIN__
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
+
+#if !defined(GTEST_DEV_EMAIL_)
+# define GTEST_DEV_EMAIL_ "googletestframework@@googlegroups.com"
+# define GTEST_FLAG_PREFIX_ "gtest_"
+# define GTEST_FLAG_PREFIX_DASH_ "gtest-"
+# define GTEST_FLAG_PREFIX_UPPER_ "GTEST_"
+# define GTEST_NAME_ "Google Test"
+# define GTEST_PROJECT_URL_ "https://github.com/google/googletest/"
+#endif  // !defined(GTEST_DEV_EMAIL_)
+
+#if !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
+# define GTEST_INIT_GOOGLE_TEST_NAME_ "testing::InitGoogleTest"
+#endif  // !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
+
+// Determines the version of gcc that is used to compile this.
+#ifdef __GNUC__
+// 40302 means version 4.3.2.
+# define GTEST_GCC_VER_ \
+    (__GNUC__*10000 + __GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__)
+#endif  // __GNUC__
+
+// Macros for disabling Microsoft Visual C++ warnings.
+//
+//   GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 4385)
+//   /* code that triggers warnings C4800 and C4385 */
+//   GTEST_DISABLE_MSC_WARNINGS_POP_()
+#if defined(_MSC_VER)
+# define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings) \
+    __pragma(warning(push))                        \
+    __pragma(warning(disable: warnings))
+# define GTEST_DISABLE_MSC_WARNINGS_POP_()          \
+    __pragma(warning(pop))
+#else
+// Not all compilers are MSVC
+# define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings)
+# define GTEST_DISABLE_MSC_WARNINGS_POP_()
+#endif
+
+// Clang on Windows does not understand MSVC's pragma warning.
+// We need clang-specific way to disable function deprecation warning.
+#ifdef __clang__
+# define GTEST_DISABLE_MSC_DEPRECATED_PUSH_()                         \
+    _Pragma("clang diagnostic push")                                  \
+    _Pragma("clang diagnostic ignored \"-Wdeprecated-declarations\"") \
+    _Pragma("clang diagnostic ignored \"-Wdeprecated-implementations\"")
+#define GTEST_DISABLE_MSC_DEPRECATED_POP_() \
+    _Pragma("clang diagnostic pop")
+#else
+# define GTEST_DISABLE_MSC_DEPRECATED_PUSH_() \
+    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4996)
+# define GTEST_DISABLE_MSC_DEPRECATED_POP_() \
+    GTEST_DISABLE_MSC_WARNINGS_POP_()
+#endif
+
+// Brings in definitions for functions used in the testing::internal::posix
+// namespace (read, write, close, chdir, isatty, stat). We do not currently
+// use them on Windows Mobile.
+#if GTEST_OS_WINDOWS
+# if !GTEST_OS_WINDOWS_MOBILE
+#  include <direct.h>
+#  include <io.h>
+# endif
+// In order to avoid having to include <windows.h>, use forward declaration
+#if GTEST_OS_WINDOWS_MINGW && !defined(__MINGW64_VERSION_MAJOR)
+// MinGW defined _CRITICAL_SECTION and _RTL_CRITICAL_SECTION as two
+// separate (equivalent) structs, instead of using typedef
+typedef struct _CRITICAL_SECTION GTEST_CRITICAL_SECTION;
+#else
+// Assume CRITICAL_SECTION is a typedef of _RTL_CRITICAL_SECTION.
+// This assumption is verified by
+// WindowsTypesTest.CRITICAL_SECTIONIs_RTL_CRITICAL_SECTION.
+typedef struct _RTL_CRITICAL_SECTION GTEST_CRITICAL_SECTION;
+#endif
+#elif GTEST_OS_XTENSA
+#include <unistd.h>
+// Xtensa toolchains define strcasecmp in the string.h header instead of
+// strings.h. string.h is already included.
+#else
+// This assumes that non-Windows OSes provide unistd.h. For OSes where this
+// is not the case, we need to include headers that provide the functions
+// mentioned above.
+# include <unistd.h>
+# include <strings.h>
+#endif  // GTEST_OS_WINDOWS
+
+#if GTEST_OS_LINUX_ANDROID
+// Used to define __ANDROID_API__ matching the target NDK API level.
+#  include <android/api-level.h>  // NOLINT
+#endif
+
+// Defines this to true if and only if Google Test can use POSIX regular
+// expressions.
+#ifndef GTEST_HAS_POSIX_RE
+# if GTEST_OS_LINUX_ANDROID
+// On Android, <regex.h> is only available starting with Gingerbread.
+#  define GTEST_HAS_POSIX_RE (__ANDROID_API__ >= 9)
+# else
+#define GTEST_HAS_POSIX_RE (!GTEST_OS_WINDOWS && !GTEST_OS_XTENSA)
+# endif
+#endif
+
+#if GTEST_USES_PCRE
+// The appropriate headers have already been included.
+
+#elif GTEST_HAS_POSIX_RE
+
+// On some platforms, <regex.h> needs someone to define size_t, and
+// won't compile otherwise.  We can #include it here as we already
+// included <stdlib.h>, which is guaranteed to define size_t through
+// <stddef.h>.
+# include <regex.h>  // NOLINT
+
+# define GTEST_USES_POSIX_RE 1
+
+#elif GTEST_OS_WINDOWS
+
+// <regex.h> is not available on Windows.  Use our own simple regex
+// implementation instead.
+# define GTEST_USES_SIMPLE_RE 1
+
+#else
+
+// <regex.h> may not be available on this platform.  Use our own
+// simple regex implementation instead.
+# define GTEST_USES_SIMPLE_RE 1
+
+#endif  // GTEST_USES_PCRE
+
+#ifndef GTEST_HAS_EXCEPTIONS
+// The user didn't tell us whether exceptions are enabled, so we need
+// to figure it out.
+# if defined(_MSC_VER) && defined(_CPPUNWIND)
+// MSVC defines _CPPUNWIND to 1 if and only if exceptions are enabled.
+#  define GTEST_HAS_EXCEPTIONS 1
+# elif defined(__BORLANDC__)
+// C++Builder's implementation of the STL uses the _HAS_EXCEPTIONS
+// macro to enable exceptions, so we'll do the same.
+// Assumes that exceptions are enabled by default.
+#  ifndef _HAS_EXCEPTIONS
+#   define _HAS_EXCEPTIONS 1
+#  endif  // _HAS_EXCEPTIONS
+#  define GTEST_HAS_EXCEPTIONS _HAS_EXCEPTIONS
+# elif defined(__clang__)
+// clang defines __EXCEPTIONS if and only if exceptions are enabled before clang
+// 220714, but if and only if cleanups are enabled after that. In Obj-C++ files,
+// there can be cleanups for ObjC exceptions which also need cleanups, even if
+// C++ exceptions are disabled. clang has __has_feature(cxx_exceptions) which
+// checks for C++ exceptions starting at clang r206352, but which checked for
+// cleanups prior to that. To reliably check for C++ exception availability with
+// clang, check for
+// __EXCEPTIONS && __has_feature(cxx_exceptions).
+#  define GTEST_HAS_EXCEPTIONS (__EXCEPTIONS && __has_feature(cxx_exceptions))
+# elif defined(__GNUC__) && __EXCEPTIONS
+// gcc defines __EXCEPTIONS to 1 if and only if exceptions are enabled.
+#  define GTEST_HAS_EXCEPTIONS 1
+# elif defined(__SUNPRO_CC)
+// Sun Pro CC supports exceptions.  However, there is no compile-time way of
+// detecting whether they are enabled or not.  Therefore, we assume that
+// they are enabled unless the user tells us otherwise.
+#  define GTEST_HAS_EXCEPTIONS 1
+# elif defined(__IBMCPP__) && __EXCEPTIONS
+// xlC defines __EXCEPTIONS to 1 if and only if exceptions are enabled.
+#  define GTEST_HAS_EXCEPTIONS 1
+# elif defined(__HP_aCC)
+// Exception handling is in effect by default in HP aCC compiler. It has to
+// be turned of by +noeh compiler option if desired.
+#  define GTEST_HAS_EXCEPTIONS 1
+# else
+// For other compilers, we assume exceptions are disabled to be
+// conservative.
+#  define GTEST_HAS_EXCEPTIONS 0
+# endif  // defined(_MSC_VER) || defined(__BORLANDC__)
+#endif  // GTEST_HAS_EXCEPTIONS
+
+#ifndef GTEST_HAS_STD_WSTRING
+// The user didn't tell us whether ::std::wstring is available, so we need
+// to figure it out.
+// Cygwin 1.7 and below doesn't support ::std::wstring.
+// Solaris' libc++ doesn't support it either.  Android has
+// no support for it at least as recent as Froyo (2.2).
+#define GTEST_HAS_STD_WSTRING                                         \
+  (!(GTEST_OS_LINUX_ANDROID || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS || \
+     GTEST_OS_HAIKU || GTEST_OS_ESP32 || GTEST_OS_ESP8266 || GTEST_OS_XTENSA))
+
+#endif  // GTEST_HAS_STD_WSTRING
+
+// Determines whether RTTI is available.
+#ifndef GTEST_HAS_RTTI
+// The user didn't tell us whether RTTI is enabled, so we need to
+// figure it out.
+
+# ifdef _MSC_VER
+
+#ifdef _CPPRTTI  // MSVC defines this macro if and only if RTTI is enabled.
+#   define GTEST_HAS_RTTI 1
+#  else
+#   define GTEST_HAS_RTTI 0
+#  endif
+
+// Starting with version 4.3.2, gcc defines __GXX_RTTI if and only if RTTI is
+// enabled.
+# elif defined(__GNUC__)
+
+#  ifdef __GXX_RTTI
+// When building against STLport with the Android NDK and with
+// -frtti -fno-exceptions, the build fails at link time with undefined
+// references to __cxa_bad_typeid. Note sure if STL or toolchain bug,
+// so disable RTTI when detected.
+#   if GTEST_OS_LINUX_ANDROID && defined(_STLPORT_MAJOR) && \
+       !defined(__EXCEPTIONS)
+#    define GTEST_HAS_RTTI 0
+#   else
+#    define GTEST_HAS_RTTI 1
+#   endif  // GTEST_OS_LINUX_ANDROID && __STLPORT_MAJOR && !__EXCEPTIONS
+#  else
+#   define GTEST_HAS_RTTI 0
+#  endif  // __GXX_RTTI
+
+// Clang defines __GXX_RTTI starting with version 3.0, but its manual recommends
+// using has_feature instead. has_feature(cxx_rtti) is supported since 2.7, the
+// first version with C++ support.
+# elif defined(__clang__)
+
+#  define GTEST_HAS_RTTI __has_feature(cxx_rtti)
+
+// Starting with version 9.0 IBM Visual Age defines __RTTI_ALL__ to 1 if
+// both the typeid and dynamic_cast features are present.
+# elif defined(__IBMCPP__) && (__IBMCPP__ >= 900)
+
+#  ifdef __RTTI_ALL__
+#   define GTEST_HAS_RTTI 1
+#  else
+#   define GTEST_HAS_RTTI 0
+#  endif
+
+# else
+
+// For all other compilers, we assume RTTI is enabled.
+#  define GTEST_HAS_RTTI 1
+
+# endif  // _MSC_VER
+
+#endif  // GTEST_HAS_RTTI
+
+// It's this header's responsibility to #include <typeinfo> when RTTI
+// is enabled.
+#if GTEST_HAS_RTTI
+# include <typeinfo>
+#endif
+
+// Determines whether Google Test can use the pthreads library.
+#ifndef GTEST_HAS_PTHREAD
+// The user didn't tell us explicitly, so we make reasonable assumptions about
+// which platforms have pthreads support.
+//
+// To disable threading support in Google Test, add -DGTEST_HAS_PTHREAD=0
+// to your compiler flags.
+#define GTEST_HAS_PTHREAD                                                      \
+  (GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_HPUX || GTEST_OS_QNX ||          \
+   GTEST_OS_FREEBSD || GTEST_OS_NACL || GTEST_OS_NETBSD || GTEST_OS_FUCHSIA || \
+   GTEST_OS_DRAGONFLY || GTEST_OS_GNU_KFREEBSD || GTEST_OS_OPENBSD ||          \
+   GTEST_OS_HAIKU)
+#endif  // GTEST_HAS_PTHREAD
+
+#if GTEST_HAS_PTHREAD
+// gtest-port.h guarantees to #include <pthread.h> when GTEST_HAS_PTHREAD is
+// true.
+# include <pthread.h>  // NOLINT
+
+// For timespec and nanosleep, used below.
+# include <time.h>  // NOLINT
+#endif
+
+// Determines whether clone(2) is supported.
+// Usually it will only be available on Linux, excluding
+// Linux on the Itanium architecture.
+// Also see http://linux.die.net/man/2/clone.
+#ifndef GTEST_HAS_CLONE
+// The user didn't tell us, so we need to figure it out.
+
+# if GTEST_OS_LINUX && !defined(__ia64__)
+#  if GTEST_OS_LINUX_ANDROID
+// On Android, clone() became available at different API levels for each 32-bit
+// architecture.
+#    if defined(__LP64__) || \
+        (defined(__arm__) && __ANDROID_API__ >= 9) || \
+        (defined(__mips__) && __ANDROID_API__ >= 12) || \
+        (defined(__i386__) && __ANDROID_API__ >= 17)
+#     define GTEST_HAS_CLONE 1
+#    else
+#     define GTEST_HAS_CLONE 0
+#    endif
+#  else
+#   define GTEST_HAS_CLONE 1
+#  endif
+# else
+#  define GTEST_HAS_CLONE 0
+# endif  // GTEST_OS_LINUX && !defined(__ia64__)
+
+#endif  // GTEST_HAS_CLONE
+
+// Determines whether to support stream redirection. This is used to test
+// output correctness and to implement death tests.
+#ifndef GTEST_HAS_STREAM_REDIRECTION
+// By default, we assume that stream redirection is supported on all
+// platforms except known mobile ones.
+#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE || \
+    GTEST_OS_WINDOWS_RT || GTEST_OS_ESP8266 || GTEST_OS_XTENSA
+#  define GTEST_HAS_STREAM_REDIRECTION 0
+# else
+#  define GTEST_HAS_STREAM_REDIRECTION 1
+# endif  // !GTEST_OS_WINDOWS_MOBILE
+#endif  // GTEST_HAS_STREAM_REDIRECTION
+
+// Determines whether to support death tests.
+// pops up a dialog window that cannot be suppressed programmatically.
+#if (GTEST_OS_LINUX || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS ||             \
+     (GTEST_OS_MAC && !GTEST_OS_IOS) ||                                   \
+     (GTEST_OS_WINDOWS_DESKTOP && _MSC_VER) || GTEST_OS_WINDOWS_MINGW ||  \
+     GTEST_OS_AIX || GTEST_OS_HPUX || GTEST_OS_OPENBSD || GTEST_OS_QNX || \
+     GTEST_OS_FREEBSD || GTEST_OS_NETBSD || GTEST_OS_FUCHSIA ||           \
+     GTEST_OS_DRAGONFLY || GTEST_OS_GNU_KFREEBSD || GTEST_OS_HAIKU)
+# define GTEST_HAS_DEATH_TEST 1
+#endif
+
+// Determines whether to support type-driven tests.
+
+// Typed tests need <typeinfo> and variadic macros, which GCC, VC++ 8.0,
+// Sun Pro CC, IBM Visual Age, and HP aCC support.
+#if defined(__GNUC__) || defined(_MSC_VER) || defined(__SUNPRO_CC) || \
+    defined(__IBMCPP__) || defined(__HP_aCC)
+# define GTEST_HAS_TYPED_TEST 1
+# define GTEST_HAS_TYPED_TEST_P 1
+#endif
+
+// Determines whether the system compiler uses UTF-16 for encoding wide strings.
+#define GTEST_WIDE_STRING_USES_UTF16_ \
+  (GTEST_OS_WINDOWS || GTEST_OS_CYGWIN || GTEST_OS_AIX || GTEST_OS_OS2)
+
+// Determines whether test results can be streamed to a socket.
+#if GTEST_OS_LINUX || GTEST_OS_GNU_KFREEBSD || GTEST_OS_DRAGONFLY || \
+    GTEST_OS_FREEBSD || GTEST_OS_NETBSD || GTEST_OS_OPENBSD
+# define GTEST_CAN_STREAM_RESULTS_ 1
+#endif
+
+// Defines some utility macros.
+
+// The GNU compiler emits a warning if nested "if" statements are followed by
+// an "else" statement and braces are not used to explicitly disambiguate the
+// "else" binding.  This leads to problems with code like:
+//
+//   if (gate)
+//     ASSERT_*(condition) << "Some message";
+//
+// The "switch (0) case 0:" idiom is used to suppress this.
+#ifdef __INTEL_COMPILER
+# define GTEST_AMBIGUOUS_ELSE_BLOCKER_
+#else
+# define GTEST_AMBIGUOUS_ELSE_BLOCKER_ switch (0) case 0: default:  // NOLINT
+#endif
+
+// Use this annotation at the end of a struct/class definition to
+// prevent the compiler from optimizing away instances that are never
+// used.  This is useful when all interesting logic happens inside the
+// c'tor and / or d'tor.  Example:
+//
+//   struct Foo {
+//     Foo() { ... }
+//   } GTEST_ATTRIBUTE_UNUSED_;
+//
+// Also use it after a variable or parameter declaration to tell the
+// compiler the variable/parameter does not have to be used.
+#if defined(__GNUC__) && !defined(COMPILER_ICC)
+# define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
+#elif defined(__clang__)
+# if __has_attribute(unused)
+#  define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
+# endif
+#endif
+#ifndef GTEST_ATTRIBUTE_UNUSED_
+# define GTEST_ATTRIBUTE_UNUSED_
+#endif
+
+// Use this annotation before a function that takes a printf format string.
+#if (defined(__GNUC__) || defined(__clang__)) && !defined(COMPILER_ICC)
+# if defined(__MINGW_PRINTF_FORMAT)
+// MinGW has two different printf implementations. Ensure the format macro
+// matches the selected implementation. See
+// https://sourceforge.net/p/mingw-w64/wiki2/gnu%20printf/.
+#  define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check) \
+       __attribute__((__format__(__MINGW_PRINTF_FORMAT, string_index, \
+                                 first_to_check)))
+# else
+#  define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check) \
+       __attribute__((__format__(__printf__, string_index, first_to_check)))
+# endif
+#else
+# define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check)
+#endif
+
+
+// A macro to disallow copy operator=
+// This should be used in the private: declarations for a class.
+#define GTEST_DISALLOW_ASSIGN_(type) \
+  type& operator=(type const &) = delete
+
+// A macro to disallow copy constructor and operator=
+// This should be used in the private: declarations for a class.
+#define GTEST_DISALLOW_COPY_AND_ASSIGN_(type) \
+  type(type const&) = delete;                 \
+  type& operator=(type const&) = delete
+
+// A macro to disallow move operator=
+// This should be used in the private: declarations for a class.
+#define GTEST_DISALLOW_MOVE_ASSIGN_(type) \
+  type& operator=(type &&) noexcept = delete
+
+// A macro to disallow move constructor and operator=
+// This should be used in the private: declarations for a class.
+#define GTEST_DISALLOW_MOVE_AND_ASSIGN_(type) \
+  type(type&&) noexcept = delete;             \
+  type& operator=(type&&) noexcept = delete
+
+// Tell the compiler to warn about unused return values for functions declared
+// with this macro.  The macro should be used on function declarations
+// following the argument list:
+//
+//   Sprocket* AllocateSprocket() GTEST_MUST_USE_RESULT_;
+#if defined(__GNUC__) && !defined(COMPILER_ICC)
+# define GTEST_MUST_USE_RESULT_ __attribute__ ((warn_unused_result))
+#else
+# define GTEST_MUST_USE_RESULT_
+#endif  // __GNUC__ && !COMPILER_ICC
+
+// MS C++ compiler emits warning when a conditional expression is compile time
+// constant. In some contexts this warning is false positive and needs to be
+// suppressed. Use the following two macros in such cases:
+//
+// GTEST_INTENTIONAL_CONST_COND_PUSH_()
+// while (true) {
+// GTEST_INTENTIONAL_CONST_COND_POP_()
+// }
+# define GTEST_INTENTIONAL_CONST_COND_PUSH_() \
+    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4127)
+# define GTEST_INTENTIONAL_CONST_COND_POP_() \
+    GTEST_DISABLE_MSC_WARNINGS_POP_()
+
+// Determine whether the compiler supports Microsoft's Structured Exception
+// Handling.  This is supported by several Windows compilers but generally
+// does not exist on any other system.
+#ifndef GTEST_HAS_SEH
+// The user didn't tell us, so we need to figure it out.
+
+# if defined(_MSC_VER) || defined(__BORLANDC__)
+// These two compilers are known to support SEH.
+#  define GTEST_HAS_SEH 1
+# else
+// Assume no SEH.
+#  define GTEST_HAS_SEH 0
+# endif
+
+#endif  // GTEST_HAS_SEH
+
+#ifndef GTEST_IS_THREADSAFE
+
+#define GTEST_IS_THREADSAFE                                                 \
+  (GTEST_HAS_MUTEX_AND_THREAD_LOCAL_ ||                                     \
+   (GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT) || \
+   GTEST_HAS_PTHREAD)
+
+#endif  // GTEST_IS_THREADSAFE
+
+// GTEST_API_ qualifies all symbols that must be exported. The definitions below
+// are guarded by #ifndef to give embedders a chance to define GTEST_API_ in
+// gtest/internal/custom/gtest-port.h
+#ifndef GTEST_API_
+
+#ifdef _MSC_VER
+# if GTEST_LINKED_AS_SHARED_LIBRARY
+#  define GTEST_API_ __declspec(dllimport)
+# elif GTEST_CREATE_SHARED_LIBRARY
+#  define GTEST_API_ __declspec(dllexport)
+# endif
+#elif __GNUC__ >= 4 || defined(__clang__)
+# define GTEST_API_ __attribute__((visibility ("default")))
+#endif  // _MSC_VER
+
+#endif  // GTEST_API_
+
+#ifndef GTEST_API_
+# define GTEST_API_
+#endif  // GTEST_API_
+
+#ifndef GTEST_DEFAULT_DEATH_TEST_STYLE
+# define GTEST_DEFAULT_DEATH_TEST_STYLE  "fast"
+#endif  // GTEST_DEFAULT_DEATH_TEST_STYLE
+
+#ifdef __GNUC__
+// Ask the compiler to never inline a given function.
+# define GTEST_NO_INLINE_ __attribute__((noinline))
+#else
+# define GTEST_NO_INLINE_
+#endif
+
+// _LIBCPP_VERSION is defined by the libc++ library from the LLVM project.
+#if !defined(GTEST_HAS_CXXABI_H_)
+# if defined(__GLIBCXX__) || (defined(_LIBCPP_VERSION) && !defined(_MSC_VER))
+#  define GTEST_HAS_CXXABI_H_ 1
+# else
+#  define GTEST_HAS_CXXABI_H_ 0
+# endif
+#endif
+
+// A function level attribute to disable checking for use of uninitialized
+// memory when built with MemorySanitizer.
+#if defined(__clang__)
+# if __has_feature(memory_sanitizer)
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_ \
+       __attribute__((no_sanitize_memory))
+# else
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
+# endif  // __has_feature(memory_sanitizer)
+#else
+# define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
+#endif  // __clang__
+
+// A function level attribute to disable AddressSanitizer instrumentation.
+#if defined(__clang__)
+# if __has_feature(address_sanitizer)
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_ \
+       __attribute__((no_sanitize_address))
+# else
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+# endif  // __has_feature(address_sanitizer)
+#else
+# define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
+#endif  // __clang__
+
+// A function level attribute to disable HWAddressSanitizer instrumentation.
+#if defined(__clang__)
+# if __has_feature(hwaddress_sanitizer)
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_ \
+       __attribute__((no_sanitize("hwaddress")))
+# else
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
+# endif  // __has_feature(hwaddress_sanitizer)
+#else
+# define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
+#endif  // __clang__
+
+// A function level attribute to disable ThreadSanitizer instrumentation.
+#if defined(__clang__)
+# if __has_feature(thread_sanitizer)
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_ \
+       __attribute__((no_sanitize_thread))
+# else
+#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
+# endif  // __has_feature(thread_sanitizer)
+#else
+# define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
+#endif  // __clang__
+
+namespace testing {
+
+class Message;
+
+// Legacy imports for backwards compatibility.
+// New code should use std:: names directly.
+using std::get;
+using std::make_tuple;
+using std::tuple;
+using std::tuple_element;
+using std::tuple_size;
+
+namespace internal {
+
+// A secret type that Google Test users don't know about.  It has no
+// definition on purpose.  Therefore it's impossible to create a
+// Secret object, which is what we want.
+class Secret;
+
+// The GTEST_COMPILE_ASSERT_ is a legacy macro used to verify that a compile
+// time expression is true (in new code, use static_assert instead). For
+// example, you could use it to verify the size of a static array:
+//
+//   GTEST_COMPILE_ASSERT_(GTEST_ARRAY_SIZE_(names) == NUM_NAMES,
+//                         names_incorrect_size);
+//
+// The second argument to the macro must be a valid C++ identifier. If the
+// expression is false, compiler will issue an error containing this identifier.
+#define GTEST_COMPILE_ASSERT_(expr, msg) static_assert(expr, #msg)
+
+// A helper for suppressing warnings on constant condition.  It just
+// returns 'condition'.
+GTEST_API_ bool IsTrue(bool condition);
+
+// Defines RE.
+
+#if GTEST_USES_PCRE
+// if used, PCRE is injected by custom/gtest-port.h
+#elif GTEST_USES_POSIX_RE || GTEST_USES_SIMPLE_RE
+
+// A simple C++ wrapper for <regex.h>.  It uses the POSIX Extended
+// Regular Expression syntax.
+class GTEST_API_ RE {
+ public:
+  // A copy constructor is required by the Standard to initialize object
+  // references from r-values.
+  RE(const RE& other) { Init(other.pattern()); }
+
+  // Constructs an RE from a string.
+  RE(const ::std::string& regex) { Init(regex.c_str()); }  // NOLINT
+
+  RE(const char* regex) { Init(regex); }  // NOLINT
+  ~RE();
+
+  // Returns the string representation of the regex.
+  const char* pattern() const { return pattern_; }
+
+  // FullMatch(str, re) returns true if and only if regular expression re
+  // matches the entire str.
+  // PartialMatch(str, re) returns true if and only if regular expression re
+  // matches a substring of str (including str itself).
+  static bool FullMatch(const ::std::string& str, const RE& re) {
+    return FullMatch(str.c_str(), re);
+  }
+  static bool PartialMatch(const ::std::string& str, const RE& re) {
+    return PartialMatch(str.c_str(), re);
+  }
+
+  static bool FullMatch(const char* str, const RE& re);
+  static bool PartialMatch(const char* str, const RE& re);
+
+ private:
+  void Init(const char* regex);
+  const char* pattern_;
+  bool is_valid_;
+
+# if GTEST_USES_POSIX_RE
+
+  regex_t full_regex_;     // For FullMatch().
+  regex_t partial_regex_;  // For PartialMatch().
+
+# else  // GTEST_USES_SIMPLE_RE
+
+  const char* full_pattern_;  // For FullMatch();
+
+# endif
+};
+
+#endif  // GTEST_USES_PCRE
+
+// Formats a source file path and a line number as they would appear
+// in an error message from the compiler used to compile this code.
+GTEST_API_ ::std::string FormatFileLocation(const char* file, int line);
+
+// Formats a file location for compiler-independent XML output.
+// Although this function is not platform dependent, we put it next to
+// FormatFileLocation in order to contrast the two functions.
+GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(const char* file,
+                                                               int line);
+
+// Defines logging utilities:
+//   GTEST_LOG_(severity) - logs messages at the specified severity level. The
+//                          message itself is streamed into the macro.
+//   LogToStderr()  - directs all log messages to stderr.
+//   FlushInfoLog() - flushes informational log messages.
+
+enum GTestLogSeverity {
+  GTEST_INFO,
+  GTEST_WARNING,
+  GTEST_ERROR,
+  GTEST_FATAL
+};
+
+// Formats log entry severity, provides a stream object for streaming the
+// log message, and terminates the message with a newline when going out of
+// scope.
+class GTEST_API_ GTestLog {
+ public:
+  GTestLog(GTestLogSeverity severity, const char* file, int line);
+
+  // Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
+  ~GTestLog();
+
+  ::std::ostream& GetStream() { return ::std::cerr; }
+
+ private:
+  const GTestLogSeverity severity_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestLog);
+};
+
+#if !defined(GTEST_LOG_)
+
+# define GTEST_LOG_(severity) \
+    ::testing::internal::GTestLog(::testing::internal::GTEST_##severity, \
+                                  __FILE__, __LINE__).GetStream()
+
+inline void LogToStderr() {}
+inline void FlushInfoLog() { fflush(nullptr); }
+
+#endif  // !defined(GTEST_LOG_)
+
+#if !defined(GTEST_CHECK_)
+// INTERNAL IMPLEMENTATION - DO NOT USE.
+//
+// GTEST_CHECK_ is an all-mode assert. It aborts the program if the condition
+// is not satisfied.
+//  Synopsys:
+//    GTEST_CHECK_(boolean_condition);
+//     or
+//    GTEST_CHECK_(boolean_condition) << "Additional message";
+//
+//    This checks the condition and if the condition is not satisfied
+//    it prints message about the condition violation, including the
+//    condition itself, plus additional message streamed into it, if any,
+//    and then it aborts the program. It aborts the program irrespective of
+//    whether it is built in the debug mode or not.
+# define GTEST_CHECK_(condition) \
+    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
+    if (::testing::internal::IsTrue(condition)) \
+      ; \
+    else \
+      GTEST_LOG_(FATAL) << "Condition " #condition " failed. "
+#endif  // !defined(GTEST_CHECK_)
+
+// An all-mode assert to verify that the given POSIX-style function
+// call returns 0 (indicating success).  Known limitation: this
+// doesn't expand to a balanced 'if' statement, so enclose the macro
+// in {} if you need to use it as the only statement in an 'if'
+// branch.
+#define GTEST_CHECK_POSIX_SUCCESS_(posix_call) \
+  if (const int gtest_error = (posix_call)) \
+    GTEST_LOG_(FATAL) << #posix_call << "failed with error " \
+                      << gtest_error
+
+// Transforms "T" into "const T&" according to standard reference collapsing
+// rules (this is only needed as a backport for C++98 compilers that do not
+// support reference collapsing). Specifically, it transforms:
+//
+//   char         ==> const char&
+//   const char   ==> const char&
+//   char&        ==> char&
+//   const char&  ==> const char&
+//
+// Note that the non-const reference will not have "const" added. This is
+// standard, and necessary so that "T" can always bind to "const T&".
+template <typename T>
+struct ConstRef { typedef const T& type; };
+template <typename T>
+struct ConstRef<T&> { typedef T& type; };
+
+// The argument T must depend on some template parameters.
+#define GTEST_REFERENCE_TO_CONST_(T) \
+  typename ::testing::internal::ConstRef<T>::type
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
+// Use ImplicitCast_ as a safe version of static_cast for upcasting in
+// the type hierarchy (e.g. casting a Foo* to a SuperclassOfFoo* or a
+// const Foo*).  When you use ImplicitCast_, the compiler checks that
+// the cast is safe.  Such explicit ImplicitCast_s are necessary in
+// surprisingly many situations where C++ demands an exact type match
+// instead of an argument type convertable to a target type.
+//
+// The syntax for using ImplicitCast_ is the same as for static_cast:
+//
+//   ImplicitCast_<ToType>(expr)
+//
+// ImplicitCast_ would have been part of the C++ standard library,
+// but the proposal was submitted too late.  It will probably make
+// its way into the language in the future.
+//
+// This relatively ugly name is intentional. It prevents clashes with
+// similar functions users may have (e.g., implicit_cast). The internal
+// namespace alone is not enough because the function can be found by ADL.
+template<typename To>
+inline To ImplicitCast_(To x) { return x; }
+
+// When you upcast (that is, cast a pointer from type Foo to type
+// SuperclassOfFoo), it's fine to use ImplicitCast_<>, since upcasts
+// always succeed.  When you downcast (that is, cast a pointer from
+// type Foo to type SubclassOfFoo), static_cast<> isn't safe, because
+// how do you know the pointer is really of type SubclassOfFoo?  It
+// could be a bare Foo, or of type DifferentSubclassOfFoo.  Thus,
+// when you downcast, you should use this macro.  In debug mode, we
+// use dynamic_cast<> to double-check the downcast is legal (we die
+// if it's not).  In normal mode, we do the efficient static_cast<>
+// instead.  Thus, it's important to test in debug mode to make sure
+// the cast is legal!
+//    This is the only place in the code we should use dynamic_cast<>.
+// In particular, you SHOULDN'T be using dynamic_cast<> in order to
+// do RTTI (eg code like this:
+//    if (dynamic_cast<Subclass1>(foo)) HandleASubclass1Object(foo);
+//    if (dynamic_cast<Subclass2>(foo)) HandleASubclass2Object(foo);
+// You should design the code some other way not to need this.
+//
+// This relatively ugly name is intentional. It prevents clashes with
+// similar functions users may have (e.g., down_cast). The internal
+// namespace alone is not enough because the function can be found by ADL.
+template<typename To, typename From>  // use like this: DownCast_<T*>(foo);
+inline To DownCast_(From* f) {  // so we only accept pointers
+  // Ensures that To is a sub-type of From *.  This test is here only
+  // for compile-time type checking, and has no overhead in an
+  // optimized build at run-time, as it will be optimized away
+  // completely.
+  GTEST_INTENTIONAL_CONST_COND_PUSH_()
+  if (false) {
+  GTEST_INTENTIONAL_CONST_COND_POP_()
+  const To to = nullptr;
+  ::testing::internal::ImplicitCast_<From*>(to);
+  }
+
+#if GTEST_HAS_RTTI
+  // RTTI: debug mode only!
+  GTEST_CHECK_(f == nullptr || dynamic_cast<To>(f) != nullptr);
+#endif
+  return static_cast<To>(f);
+}
+
+// Downcasts the pointer of type Base to Derived.
+// Derived must be a subclass of Base. The parameter MUST
+// point to a class of type Derived, not any subclass of it.
+// When RTTI is available, the function performs a runtime
+// check to enforce this.
+template <class Derived, class Base>
+Derived* CheckedDowncastToActualType(Base* base) {
+#if GTEST_HAS_RTTI
+  GTEST_CHECK_(typeid(*base) == typeid(Derived));
+#endif
+
+#if GTEST_HAS_DOWNCAST_
+  return ::down_cast<Derived*>(base);
+#elif GTEST_HAS_RTTI
+  return dynamic_cast<Derived*>(base);  // NOLINT
+#else
+  return static_cast<Derived*>(base);  // Poor man's downcast.
+#endif
+}
+
+#if GTEST_HAS_STREAM_REDIRECTION
+
+// Defines the stderr capturer:
+//   CaptureStdout     - starts capturing stdout.
+//   GetCapturedStdout - stops capturing stdout and returns the captured string.
+//   CaptureStderr     - starts capturing stderr.
+//   GetCapturedStderr - stops capturing stderr and returns the captured string.
+//
+GTEST_API_ void CaptureStdout();
+GTEST_API_ std::string GetCapturedStdout();
+GTEST_API_ void CaptureStderr();
+GTEST_API_ std::string GetCapturedStderr();
+
+#endif  // GTEST_HAS_STREAM_REDIRECTION
+// Returns the size (in bytes) of a file.
+GTEST_API_ size_t GetFileSize(FILE* file);
+
+// Reads the entire content of a file as a string.
+GTEST_API_ std::string ReadEntireFile(FILE* file);
+
+// All command line arguments.
+GTEST_API_ std::vector<std::string> GetArgvs();
+
+#if GTEST_HAS_DEATH_TEST
+
+std::vector<std::string> GetInjectableArgvs();
+// Deprecated: pass the args vector by value instead.
+void SetInjectableArgvs(const std::vector<std::string>* new_argvs);
+void SetInjectableArgvs(const std::vector<std::string>& new_argvs);
+void ClearInjectableArgvs();
+
+#endif  // GTEST_HAS_DEATH_TEST
+
+// Defines synchronization primitives.
+#if GTEST_IS_THREADSAFE
+# if GTEST_HAS_PTHREAD
+// Sleeps for (roughly) n milliseconds.  This function is only for testing
+// Google Test's own constructs.  Don't use it in user tests, either
+// directly or indirectly.
+inline void SleepMilliseconds(int n) {
+  const timespec time = {
+    0,                  // 0 seconds.
+    n * 1000L * 1000L,  // And n ms.
+  };
+  nanosleep(&time, nullptr);
+}
+# endif  // GTEST_HAS_PTHREAD
+
+# if GTEST_HAS_NOTIFICATION_
+// Notification has already been imported into the namespace.
+// Nothing to do here.
+
+# elif GTEST_HAS_PTHREAD
+// Allows a controller thread to pause execution of newly created
+// threads until notified.  Instances of this class must be created
+// and destroyed in the controller thread.
+//
+// This class is only for testing Google Test's own constructs. Do not
+// use it in user tests, either directly or indirectly.
+class Notification {
+ public:
+  Notification() : notified_(false) {
+    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_init(&mutex_, nullptr));
+  }
+  ~Notification() {
+    pthread_mutex_destroy(&mutex_);
+  }
+
+  // Notifies all threads created with this notification to start. Must
+  // be called from the controller thread.
+  void Notify() {
+    pthread_mutex_lock(&mutex_);
+    notified_ = true;
+    pthread_mutex_unlock(&mutex_);
+  }
+
+  // Blocks until the controller thread notifies. Must be called from a test
+  // thread.
+  void WaitForNotification() {
+    for (;;) {
+      pthread_mutex_lock(&mutex_);
+      const bool notified = notified_;
+      pthread_mutex_unlock(&mutex_);
+      if (notified)
+        break;
+      SleepMilliseconds(10);
+    }
+  }
+
+ private:
+  pthread_mutex_t mutex_;
+  bool notified_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
+};
+
+# elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
+
+GTEST_API_ void SleepMilliseconds(int n);
+
+// Provides leak-safe Windows kernel handle ownership.
+// Used in death tests and in threading support.
+class GTEST_API_ AutoHandle {
+ public:
+  // Assume that Win32 HANDLE type is equivalent to void*. Doing so allows us to
+  // avoid including <windows.h> in this header file. Including <windows.h> is
+  // undesirable because it defines a lot of symbols and macros that tend to
+  // conflict with client code. This assumption is verified by
+  // WindowsTypesTest.HANDLEIsVoidStar.
+  typedef void* Handle;
+  AutoHandle();
+  explicit AutoHandle(Handle handle);
+
+  ~AutoHandle();
+
+  Handle Get() const;
+  void Reset();
+  void Reset(Handle handle);
+
+ private:
+  // Returns true if and only if the handle is a valid handle object that can be
+  // closed.
+  bool IsCloseable() const;
+
+  Handle handle_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(AutoHandle);
+};
+
+// Allows a controller thread to pause execution of newly created
+// threads until notified.  Instances of this class must be created
+// and destroyed in the controller thread.
+//
+// This class is only for testing Google Test's own constructs. Do not
+// use it in user tests, either directly or indirectly.
+class GTEST_API_ Notification {
+ public:
+  Notification();
+  void Notify();
+  void WaitForNotification();
+
+ private:
+  AutoHandle event_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
+};
+# endif  // GTEST_HAS_NOTIFICATION_
+
+// On MinGW, we can have both GTEST_OS_WINDOWS and GTEST_HAS_PTHREAD
+// defined, but we don't want to use MinGW's pthreads implementation, which
+// has conformance problems with some versions of the POSIX standard.
+# if GTEST_HAS_PTHREAD && !GTEST_OS_WINDOWS_MINGW
+
+// As a C-function, ThreadFuncWithCLinkage cannot be templated itself.
+// Consequently, it cannot select a correct instantiation of ThreadWithParam
+// in order to call its Run(). Introducing ThreadWithParamBase as a
+// non-templated base class for ThreadWithParam allows us to bypass this
+// problem.
+class ThreadWithParamBase {
+ public:
+  virtual ~ThreadWithParamBase() {}
+  virtual void Run() = 0;
+};
+
+// pthread_create() accepts a pointer to a function type with the C linkage.
+// According to the Standard (7.5/1), function types with different linkages
+// are different even if they are otherwise identical.  Some compilers (for
+// example, SunStudio) treat them as different types.  Since class methods
+// cannot be defined with C-linkage we need to define a free C-function to
+// pass into pthread_create().
+extern "C" inline void* ThreadFuncWithCLinkage(void* thread) {
+  static_cast<ThreadWithParamBase*>(thread)->Run();
+  return nullptr;
+}
+
+// Helper class for testing Google Test's multi-threading constructs.
+// To use it, write:
+//
+//   void ThreadFunc(int param) { /* Do things with param */ }
+//   Notification thread_can_start;
+//   ...
+//   // The thread_can_start parameter is optional; you can supply NULL.
+//   ThreadWithParam<int> thread(&ThreadFunc, 5, &thread_can_start);
+//   thread_can_start.Notify();
+//
+// These classes are only for testing Google Test's own constructs. Do
+// not use them in user tests, either directly or indirectly.
+template <typename T>
+class ThreadWithParam : public ThreadWithParamBase {
+ public:
+  typedef void UserThreadFunc(T);
+
+  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
+      : func_(func),
+        param_(param),
+        thread_can_start_(thread_can_start),
+        finished_(false) {
+    ThreadWithParamBase* const base = this;
+    // The thread can be created only after all fields except thread_
+    // have been initialized.
+    GTEST_CHECK_POSIX_SUCCESS_(
+        pthread_create(&thread_, nullptr, &ThreadFuncWithCLinkage, base));
+  }
+  ~ThreadWithParam() override { Join(); }
+
+  void Join() {
+    if (!finished_) {
+      GTEST_CHECK_POSIX_SUCCESS_(pthread_join(thread_, nullptr));
+      finished_ = true;
+    }
+  }
+
+  void Run() override {
+    if (thread_can_start_ != nullptr) thread_can_start_->WaitForNotification();
+    func_(param_);
+  }
+
+ private:
+  UserThreadFunc* const func_;  // User-supplied thread function.
+  const T param_;  // User-supplied parameter to the thread function.
+  // When non-NULL, used to block execution until the controller thread
+  // notifies.
+  Notification* const thread_can_start_;
+  bool finished_;  // true if and only if we know that the thread function has
+                   // finished.
+  pthread_t thread_;  // The native thread object.
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
+};
+# endif  // !GTEST_OS_WINDOWS && GTEST_HAS_PTHREAD ||
+         // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
+
+# if GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
+// Mutex and ThreadLocal have already been imported into the namespace.
+// Nothing to do here.
+
+# elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
+
+// Mutex implements mutex on Windows platforms.  It is used in conjunction
+// with class MutexLock:
+//
+//   Mutex mutex;
+//   ...
+//   MutexLock lock(&mutex);  // Acquires the mutex and releases it at the
+//                            // end of the current scope.
+//
+// A static Mutex *must* be defined or declared using one of the following
+// macros:
+//   GTEST_DEFINE_STATIC_MUTEX_(g_some_mutex);
+//   GTEST_DECLARE_STATIC_MUTEX_(g_some_mutex);
+//
+// (A non-static Mutex is defined/declared in the usual way).
+class GTEST_API_ Mutex {
+ public:
+  enum MutexType { kStatic = 0, kDynamic = 1 };
+  // We rely on kStaticMutex being 0 as it is to what the linker initializes
+  // type_ in static mutexes.  critical_section_ will be initialized lazily
+  // in ThreadSafeLazyInit().
+  enum StaticConstructorSelector { kStaticMutex = 0 };
+
+  // This constructor intentionally does nothing.  It relies on type_ being
+  // statically initialized to 0 (effectively setting it to kStatic) and on
+  // ThreadSafeLazyInit() to lazily initialize the rest of the members.
+  explicit Mutex(StaticConstructorSelector /*dummy*/) {}
+
+  Mutex();
+  ~Mutex();
+
+  void Lock();
+
+  void Unlock();
+
+  // Does nothing if the current thread holds the mutex. Otherwise, crashes
+  // with high probability.
+  void AssertHeld();
+
+ private:
+  // Initializes owner_thread_id_ and critical_section_ in static mutexes.
+  void ThreadSafeLazyInit();
+
+  // Per https://blogs.msdn.microsoft.com/oldnewthing/20040223-00/?p=40503,
+  // we assume that 0 is an invalid value for thread IDs.
+  unsigned int owner_thread_id_;
+
+  // For static mutexes, we rely on these members being initialized to zeros
+  // by the linker.
+  MutexType type_;
+  long critical_section_init_phase_;  // NOLINT
+  GTEST_CRITICAL_SECTION* critical_section_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
+};
+
+# define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
+    extern ::testing::internal::Mutex mutex
+
+# define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
+    ::testing::internal::Mutex mutex(::testing::internal::Mutex::kStaticMutex)
+
+// We cannot name this class MutexLock because the ctor declaration would
+// conflict with a macro named MutexLock, which is defined on some
+// platforms. That macro is used as a defensive measure to prevent against
+// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
+// "MutexLock l(&mu)".  Hence the typedef trick below.
+class GTestMutexLock {
+ public:
+  explicit GTestMutexLock(Mutex* mutex)
+      : mutex_(mutex) { mutex_->Lock(); }
+
+  ~GTestMutexLock() { mutex_->Unlock(); }
+
+ private:
+  Mutex* const mutex_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
+};
+
+typedef GTestMutexLock MutexLock;
+
+// Base class for ValueHolder<T>.  Allows a caller to hold and delete a value
+// without knowing its type.
+class ThreadLocalValueHolderBase {
+ public:
+  virtual ~ThreadLocalValueHolderBase() {}
+};
+
+// Provides a way for a thread to send notifications to a ThreadLocal
+// regardless of its parameter type.
+class ThreadLocalBase {
+ public:
+  // Creates a new ValueHolder<T> object holding a default value passed to
+  // this ThreadLocal<T>'s constructor and returns it.  It is the caller's
+  // responsibility not to call this when the ThreadLocal<T> instance already
+  // has a value on the current thread.
+  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const = 0;
+
+ protected:
+  ThreadLocalBase() {}
+  virtual ~ThreadLocalBase() {}
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocalBase);
+};
+
+// Maps a thread to a set of ThreadLocals that have values instantiated on that
+// thread and notifies them when the thread exits.  A ThreadLocal instance is
+// expected to persist until all threads it has values on have terminated.
+class GTEST_API_ ThreadLocalRegistry {
+ public:
+  // Registers thread_local_instance as having value on the current thread.
+  // Returns a value that can be used to identify the thread from other threads.
+  static ThreadLocalValueHolderBase* GetValueOnCurrentThread(
+      const ThreadLocalBase* thread_local_instance);
+
+  // Invoked when a ThreadLocal instance is destroyed.
+  static void OnThreadLocalDestroyed(
+      const ThreadLocalBase* thread_local_instance);
+};
+
+class GTEST_API_ ThreadWithParamBase {
+ public:
+  void Join();
+
+ protected:
+  class Runnable {
+   public:
+    virtual ~Runnable() {}
+    virtual void Run() = 0;
+  };
+
+  ThreadWithParamBase(Runnable *runnable, Notification* thread_can_start);
+  virtual ~ThreadWithParamBase();
+
+ private:
+  AutoHandle thread_;
+};
+
+// Helper class for testing Google Test's multi-threading constructs.
+template <typename T>
+class ThreadWithParam : public ThreadWithParamBase {
+ public:
+  typedef void UserThreadFunc(T);
+
+  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
+      : ThreadWithParamBase(new RunnableImpl(func, param), thread_can_start) {
+  }
+  virtual ~ThreadWithParam() {}
+
+ private:
+  class RunnableImpl : public Runnable {
+   public:
+    RunnableImpl(UserThreadFunc* func, T param)
+        : func_(func),
+          param_(param) {
+    }
+    virtual ~RunnableImpl() {}
+    virtual void Run() {
+      func_(param_);
+    }
+
+   private:
+    UserThreadFunc* const func_;
+    const T param_;
+
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(RunnableImpl);
+  };
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
+};
+
+// Implements thread-local storage on Windows systems.
+//
+//   // Thread 1
+//   ThreadLocal<int> tl(100);  // 100 is the default value for each thread.
+//
+//   // Thread 2
+//   tl.set(150);  // Changes the value for thread 2 only.
+//   EXPECT_EQ(150, tl.get());
+//
+//   // Thread 1
+//   EXPECT_EQ(100, tl.get());  // In thread 1, tl has the original value.
+//   tl.set(200);
+//   EXPECT_EQ(200, tl.get());
+//
+// The template type argument T must have a public copy constructor.
+// In addition, the default ThreadLocal constructor requires T to have
+// a public default constructor.
+//
+// The users of a TheadLocal instance have to make sure that all but one
+// threads (including the main one) using that instance have exited before
+// destroying it. Otherwise, the per-thread objects managed for them by the
+// ThreadLocal instance are not guaranteed to be destroyed on all platforms.
+//
+// Google Test only uses global ThreadLocal objects.  That means they
+// will die after main() has returned.  Therefore, no per-thread
+// object managed by Google Test will be leaked as long as all threads
+// using Google Test have exited when main() returns.
+template <typename T>
+class ThreadLocal : public ThreadLocalBase {
+ public:
+  ThreadLocal() : default_factory_(new DefaultValueHolderFactory()) {}
+  explicit ThreadLocal(const T& value)
+      : default_factory_(new InstanceValueHolderFactory(value)) {}
+
+  ~ThreadLocal() { ThreadLocalRegistry::OnThreadLocalDestroyed(this); }
+
+  T* pointer() { return GetOrCreateValue(); }
+  const T* pointer() const { return GetOrCreateValue(); }
+  const T& get() const { return *pointer(); }
+  void set(const T& value) { *pointer() = value; }
+
+ private:
+  // Holds a value of T.  Can be deleted via its base class without the caller
+  // knowing the type of T.
+  class ValueHolder : public ThreadLocalValueHolderBase {
+   public:
+    ValueHolder() : value_() {}
+    explicit ValueHolder(const T& value) : value_(value) {}
+
+    T* pointer() { return &value_; }
+
+   private:
+    T value_;
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
+  };
+
+
+  T* GetOrCreateValue() const {
+    return static_cast<ValueHolder*>(
+        ThreadLocalRegistry::GetValueOnCurrentThread(this))->pointer();
+  }
+
+  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const {
+    return default_factory_->MakeNewHolder();
+  }
+
+  class ValueHolderFactory {
+   public:
+    ValueHolderFactory() {}
+    virtual ~ValueHolderFactory() {}
+    virtual ValueHolder* MakeNewHolder() const = 0;
+
+   private:
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
+  };
+
+  class DefaultValueHolderFactory : public ValueHolderFactory {
+   public:
+    DefaultValueHolderFactory() {}
+    ValueHolder* MakeNewHolder() const override { return new ValueHolder(); }
+
+   private:
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
+  };
+
+  class InstanceValueHolderFactory : public ValueHolderFactory {
+   public:
+    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
+    ValueHolder* MakeNewHolder() const override {
+      return new ValueHolder(value_);
+    }
+
+   private:
+    const T value_;  // The value for each thread.
+
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
+  };
+
+  std::unique_ptr<ValueHolderFactory> default_factory_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
+};
+
+# elif GTEST_HAS_PTHREAD
+
+// MutexBase and Mutex implement mutex on pthreads-based platforms.
+class MutexBase {
+ public:
+  // Acquires this mutex.
+  void Lock() {
+    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_lock(&mutex_));
+    owner_ = pthread_self();
+    has_owner_ = true;
+  }
+
+  // Releases this mutex.
+  void Unlock() {
+    // Since the lock is being released the owner_ field should no longer be
+    // considered valid. We don't protect writing to has_owner_ here, as it's
+    // the caller's responsibility to ensure that the current thread holds the
+    // mutex when this is called.
+    has_owner_ = false;
+    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_unlock(&mutex_));
+  }
+
+  // Does nothing if the current thread holds the mutex. Otherwise, crashes
+  // with high probability.
+  void AssertHeld() const {
+    GTEST_CHECK_(has_owner_ && pthread_equal(owner_, pthread_self()))
+        << "The current thread is not holding the mutex @" << this;
+  }
+
+  // A static mutex may be used before main() is entered.  It may even
+  // be used before the dynamic initialization stage.  Therefore we
+  // must be able to initialize a static mutex object at link time.
+  // This means MutexBase has to be a POD and its member variables
+  // have to be public.
+ public:
+  pthread_mutex_t mutex_;  // The underlying pthread mutex.
+  // has_owner_ indicates whether the owner_ field below contains a valid thread
+  // ID and is therefore safe to inspect (e.g., to use in pthread_equal()). All
+  // accesses to the owner_ field should be protected by a check of this field.
+  // An alternative might be to memset() owner_ to all zeros, but there's no
+  // guarantee that a zero'd pthread_t is necessarily invalid or even different
+  // from pthread_self().
+  bool has_owner_;
+  pthread_t owner_;  // The thread holding the mutex.
+};
+
+// Forward-declares a static mutex.
+#  define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
+     extern ::testing::internal::MutexBase mutex
+
+// Defines and statically (i.e. at link time) initializes a static mutex.
+// The initialization list here does not explicitly initialize each field,
+// instead relying on default initialization for the unspecified fields. In
+// particular, the owner_ field (a pthread_t) is not explicitly initialized.
+// This allows initialization to work whether pthread_t is a scalar or struct.
+// The flag -Wmissing-field-initializers must not be specified for this to work.
+#define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
+  ::testing::internal::MutexBase mutex = {PTHREAD_MUTEX_INITIALIZER, false, 0}
+
+// The Mutex class can only be used for mutexes created at runtime. It
+// shares its API with MutexBase otherwise.
+class Mutex : public MutexBase {
+ public:
+  Mutex() {
+    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_init(&mutex_, nullptr));
+    has_owner_ = false;
+  }
+  ~Mutex() {
+    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_destroy(&mutex_));
+  }
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
+};
+
+// We cannot name this class MutexLock because the ctor declaration would
+// conflict with a macro named MutexLock, which is defined on some
+// platforms. That macro is used as a defensive measure to prevent against
+// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
+// "MutexLock l(&mu)".  Hence the typedef trick below.
+class GTestMutexLock {
+ public:
+  explicit GTestMutexLock(MutexBase* mutex)
+      : mutex_(mutex) { mutex_->Lock(); }
+
+  ~GTestMutexLock() { mutex_->Unlock(); }
+
+ private:
+  MutexBase* const mutex_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
+};
+
+typedef GTestMutexLock MutexLock;
+
+// Helpers for ThreadLocal.
+
+// pthread_key_create() requires DeleteThreadLocalValue() to have
+// C-linkage.  Therefore it cannot be templatized to access
+// ThreadLocal<T>.  Hence the need for class
+// ThreadLocalValueHolderBase.
+class ThreadLocalValueHolderBase {
+ public:
+  virtual ~ThreadLocalValueHolderBase() {}
+};
+
+// Called by pthread to delete thread-local data stored by
+// pthread_setspecific().
+extern "C" inline void DeleteThreadLocalValue(void* value_holder) {
+  delete static_cast<ThreadLocalValueHolderBase*>(value_holder);
+}
+
+// Implements thread-local storage on pthreads-based systems.
+template <typename T>
+class GTEST_API_ ThreadLocal {
+ public:
+  ThreadLocal()
+      : key_(CreateKey()), default_factory_(new DefaultValueHolderFactory()) {}
+  explicit ThreadLocal(const T& value)
+      : key_(CreateKey()),
+        default_factory_(new InstanceValueHolderFactory(value)) {}
+
+  ~ThreadLocal() {
+    // Destroys the managed object for the current thread, if any.
+    DeleteThreadLocalValue(pthread_getspecific(key_));
+
+    // Releases resources associated with the key.  This will *not*
+    // delete managed objects for other threads.
+    GTEST_CHECK_POSIX_SUCCESS_(pthread_key_delete(key_));
+  }
+
+  T* pointer() { return GetOrCreateValue(); }
+  const T* pointer() const { return GetOrCreateValue(); }
+  const T& get() const { return *pointer(); }
+  void set(const T& value) { *pointer() = value; }
+
+ private:
+  // Holds a value of type T.
+  class ValueHolder : public ThreadLocalValueHolderBase {
+   public:
+    ValueHolder() : value_() {}
+    explicit ValueHolder(const T& value) : value_(value) {}
+
+    T* pointer() { return &value_; }
+
+   private:
+    T value_;
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
+  };
+
+  static pthread_key_t CreateKey() {
+    pthread_key_t key;
+    // When a thread exits, DeleteThreadLocalValue() will be called on
+    // the object managed for that thread.
+    GTEST_CHECK_POSIX_SUCCESS_(
+        pthread_key_create(&key, &DeleteThreadLocalValue));
+    return key;
+  }
+
+  T* GetOrCreateValue() const {
+    ThreadLocalValueHolderBase* const holder =
+        static_cast<ThreadLocalValueHolderBase*>(pthread_getspecific(key_));
+    if (holder != nullptr) {
+      return CheckedDowncastToActualType<ValueHolder>(holder)->pointer();
+    }
+
+    ValueHolder* const new_holder = default_factory_->MakeNewHolder();
+    ThreadLocalValueHolderBase* const holder_base = new_holder;
+    GTEST_CHECK_POSIX_SUCCESS_(pthread_setspecific(key_, holder_base));
+    return new_holder->pointer();
+  }
+
+  class ValueHolderFactory {
+   public:
+    ValueHolderFactory() {}
+    virtual ~ValueHolderFactory() {}
+    virtual ValueHolder* MakeNewHolder() const = 0;
+
+   private:
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
+  };
+
+  class DefaultValueHolderFactory : public ValueHolderFactory {
+   public:
+    DefaultValueHolderFactory() {}
+    ValueHolder* MakeNewHolder() const override { return new ValueHolder(); }
+
+   private:
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
+  };
+
+  class InstanceValueHolderFactory : public ValueHolderFactory {
+   public:
+    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
+    ValueHolder* MakeNewHolder() const override {
+      return new ValueHolder(value_);
+    }
+
+   private:
+    const T value_;  // The value for each thread.
+
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
+  };
+
+  // A key pthreads uses for looking up per-thread values.
+  const pthread_key_t key_;
+  std::unique_ptr<ValueHolderFactory> default_factory_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
+};
+
+# endif  // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
+
+#else  // GTEST_IS_THREADSAFE
+
+// A dummy implementation of synchronization primitives (mutex, lock,
+// and thread-local variable).  Necessary for compiling Google Test where
+// mutex is not supported - using Google Test in multiple threads is not
+// supported on such platforms.
+
+class Mutex {
+ public:
+  Mutex() {}
+  void Lock() {}
+  void Unlock() {}
+  void AssertHeld() const {}
+};
+
+# define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
+  extern ::testing::internal::Mutex mutex
+
+# define GTEST_DEFINE_STATIC_MUTEX_(mutex) ::testing::internal::Mutex mutex
+
+// We cannot name this class MutexLock because the ctor declaration would
+// conflict with a macro named MutexLock, which is defined on some
+// platforms. That macro is used as a defensive measure to prevent against
+// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
+// "MutexLock l(&mu)".  Hence the typedef trick below.
+class GTestMutexLock {
+ public:
+  explicit GTestMutexLock(Mutex*) {}  // NOLINT
+};
+
+typedef GTestMutexLock MutexLock;
+
+template <typename T>
+class GTEST_API_ ThreadLocal {
+ public:
+  ThreadLocal() : value_() {}
+  explicit ThreadLocal(const T& value) : value_(value) {}
+  T* pointer() { return &value_; }
+  const T* pointer() const { return &value_; }
+  const T& get() const { return value_; }
+  void set(const T& value) { value_ = value; }
+ private:
+  T value_;
+};
+
+#endif  // GTEST_IS_THREADSAFE
+
+// Returns the number of threads running in the process, or 0 to indicate that
+// we cannot detect it.
+GTEST_API_ size_t GetThreadCount();
+
+#if GTEST_OS_WINDOWS
+# define GTEST_PATH_SEP_ "\\"
+# define GTEST_HAS_ALT_PATH_SEP_ 1
+#else
+# define GTEST_PATH_SEP_ "/"
+# define GTEST_HAS_ALT_PATH_SEP_ 0
+#endif  // GTEST_OS_WINDOWS
+
+// Utilities for char.
+
+// isspace(int ch) and friends accept an unsigned char or EOF.  char
+// may be signed, depending on the compiler (or compiler flags).
+// Therefore we need to cast a char to unsigned char before calling
+// isspace(), etc.
+
+inline bool IsAlpha(char ch) {
+  return isalpha(static_cast<unsigned char>(ch)) != 0;
+}
+inline bool IsAlNum(char ch) {
+  return isalnum(static_cast<unsigned char>(ch)) != 0;
+}
+inline bool IsDigit(char ch) {
+  return isdigit(static_cast<unsigned char>(ch)) != 0;
+}
+inline bool IsLower(char ch) {
+  return islower(static_cast<unsigned char>(ch)) != 0;
+}
+inline bool IsSpace(char ch) {
+  return isspace(static_cast<unsigned char>(ch)) != 0;
+}
+inline bool IsUpper(char ch) {
+  return isupper(static_cast<unsigned char>(ch)) != 0;
+}
+inline bool IsXDigit(char ch) {
+  return isxdigit(static_cast<unsigned char>(ch)) != 0;
+}
+#ifdef __cpp_char8_t
+inline bool IsXDigit(char8_t ch) {
+  return isxdigit(static_cast<unsigned char>(ch)) != 0;
+}
+#endif
+inline bool IsXDigit(char16_t ch) {
+  const unsigned char low_byte = static_cast<unsigned char>(ch);
+  return ch == low_byte && isxdigit(low_byte) != 0;
+}
+inline bool IsXDigit(char32_t ch) {
+  const unsigned char low_byte = static_cast<unsigned char>(ch);
+  return ch == low_byte && isxdigit(low_byte) != 0;
+}
+inline bool IsXDigit(wchar_t ch) {
+  const unsigned char low_byte = static_cast<unsigned char>(ch);
+  return ch == low_byte && isxdigit(low_byte) != 0;
+}
+
+inline char ToLower(char ch) {
+  return static_cast<char>(tolower(static_cast<unsigned char>(ch)));
+}
+inline char ToUpper(char ch) {
+  return static_cast<char>(toupper(static_cast<unsigned char>(ch)));
+}
+
+inline std::string StripTrailingSpaces(std::string str) {
+  std::string::iterator it = str.end();
+  while (it != str.begin() && IsSpace(*--it))
+    it = str.erase(it);
+  return str;
+}
+
+// The testing::internal::posix namespace holds wrappers for common
+// POSIX functions.  These wrappers hide the differences between
+// Windows/MSVC and POSIX systems.  Since some compilers define these
+// standard functions as macros, the wrapper cannot have the same name
+// as the wrapped function.
+
+namespace posix {
+
+// Functions with a different name on Windows.
+
+#if GTEST_OS_WINDOWS
+
+typedef struct _stat StatStruct;
+
+# ifdef __BORLANDC__
+inline int DoIsATTY(int fd) { return isatty(fd); }
+inline int StrCaseCmp(const char* s1, const char* s2) {
+  return stricmp(s1, s2);
+}
+inline char* StrDup(const char* src) { return strdup(src); }
+# else  // !__BORLANDC__
+#  if GTEST_OS_WINDOWS_MOBILE
+inline int DoIsATTY(int /* fd */) { return 0; }
+#  else
+inline int DoIsATTY(int fd) { return _isatty(fd); }
+#  endif  // GTEST_OS_WINDOWS_MOBILE
+inline int StrCaseCmp(const char* s1, const char* s2) {
+  return _stricmp(s1, s2);
+}
+inline char* StrDup(const char* src) { return _strdup(src); }
+# endif  // __BORLANDC__
+
+# if GTEST_OS_WINDOWS_MOBILE
+inline int FileNo(FILE* file) { return reinterpret_cast<int>(_fileno(file)); }
+// Stat(), RmDir(), and IsDir() are not needed on Windows CE at this
+// time and thus not defined there.
+# else
+inline int FileNo(FILE* file) { return _fileno(file); }
+inline int Stat(const char* path, StatStruct* buf) { return _stat(path, buf); }
+inline int RmDir(const char* dir) { return _rmdir(dir); }
+inline bool IsDir(const StatStruct& st) {
+  return (_S_IFDIR & st.st_mode) != 0;
+}
+# endif  // GTEST_OS_WINDOWS_MOBILE
+
+#elif GTEST_OS_ESP8266
+typedef struct stat StatStruct;
+
+inline int FileNo(FILE* file) { return fileno(file); }
+inline int DoIsATTY(int fd) { return isatty(fd); }
+inline int Stat(const char* path, StatStruct* buf) {
+  // stat function not implemented on ESP8266
+  return 0;
+}
+inline int StrCaseCmp(const char* s1, const char* s2) {
+  return strcasecmp(s1, s2);
+}
+inline char* StrDup(const char* src) { return strdup(src); }
+inline int RmDir(const char* dir) { return rmdir(dir); }
+inline bool IsDir(const StatStruct& st) { return S_ISDIR(st.st_mode); }
+
+#else
+
+typedef struct stat StatStruct;
+
+inline int FileNo(FILE* file) { return fileno(file); }
+inline int DoIsATTY(int fd) { return isatty(fd); }
+inline int Stat(const char* path, StatStruct* buf) { return stat(path, buf); }
+inline int StrCaseCmp(const char* s1, const char* s2) {
+  return strcasecmp(s1, s2);
+}
+inline char* StrDup(const char* src) { return strdup(src); }
+inline int RmDir(const char* dir) { return rmdir(dir); }
+inline bool IsDir(const StatStruct& st) { return S_ISDIR(st.st_mode); }
+
+#endif  // GTEST_OS_WINDOWS
+
+inline int IsATTY(int fd) {
+  // DoIsATTY might change errno (for example ENOTTY in case you redirect stdout
+  // to a file on Linux), which is unexpected, so save the previous value, and
+  // restore it after the call.
+  int savedErrno = errno;
+  int isAttyValue = DoIsATTY(fd);
+  errno = savedErrno;
+
+  return isAttyValue;
+}
+
+// Functions deprecated by MSVC 8.0.
+
+GTEST_DISABLE_MSC_DEPRECATED_PUSH_()
+
+// ChDir(), FReopen(), FDOpen(), Read(), Write(), Close(), and
+// StrError() aren't needed on Windows CE at this time and thus not
+// defined there.
+
+#if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && \
+    !GTEST_OS_WINDOWS_RT && !GTEST_OS_ESP8266 && !GTEST_OS_XTENSA
+inline int ChDir(const char* dir) { return chdir(dir); }
+#endif
+inline FILE* FOpen(const char* path, const char* mode) {
+#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
+  struct wchar_codecvt : public std::codecvt<wchar_t, char, std::mbstate_t> {};
+  std::wstring_convert<wchar_codecvt> converter;
+  std::wstring wide_path = converter.from_bytes(path);
+  std::wstring wide_mode = converter.from_bytes(mode);
+  return _wfopen(wide_path.c_str(), wide_mode.c_str());
+#else  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
+  return fopen(path, mode);
+#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
+}
+#if !GTEST_OS_WINDOWS_MOBILE
+inline FILE *FReopen(const char* path, const char* mode, FILE* stream) {
+  return freopen(path, mode, stream);
+}
+inline FILE* FDOpen(int fd, const char* mode) { return fdopen(fd, mode); }
+#endif
+inline int FClose(FILE* fp) { return fclose(fp); }
+#if !GTEST_OS_WINDOWS_MOBILE
+inline int Read(int fd, void* buf, unsigned int count) {
+  return static_cast<int>(read(fd, buf, count));
+}
+inline int Write(int fd, const void* buf, unsigned int count) {
+  return static_cast<int>(write(fd, buf, count));
+}
+inline int Close(int fd) { return close(fd); }
+inline const char* StrError(int errnum) { return strerror(errnum); }
+#endif
+inline const char* GetEnv(const char* name) {
+#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE || \
+    GTEST_OS_WINDOWS_RT || GTEST_OS_ESP8266 || GTEST_OS_XTENSA
+  // We are on an embedded platform, which has no environment variables.
+  static_cast<void>(name);  // To prevent 'unused argument' warning.
+  return nullptr;
+#elif defined(__BORLANDC__) || defined(__SunOS_5_8) || defined(__SunOS_5_9)
+  // Environment variables which we programmatically clear will be set to the
+  // empty string rather than unset (NULL).  Handle that case.
+  const char* const env = getenv(name);
+  return (env != nullptr && env[0] != '\0') ? env : nullptr;
+#else
+  return getenv(name);
+#endif
+}
+
+GTEST_DISABLE_MSC_DEPRECATED_POP_()
+
+#if GTEST_OS_WINDOWS_MOBILE
+// Windows CE has no C library. The abort() function is used in
+// several places in Google Test. This implementation provides a reasonable
+// imitation of standard behaviour.
+[[noreturn]] void Abort();
+#else
+[[noreturn]] inline void Abort() { abort(); }
+#endif  // GTEST_OS_WINDOWS_MOBILE
+
+}  // namespace posix
+
+// MSVC "deprecates" snprintf and issues warnings wherever it is used.  In
+// order to avoid these warnings, we need to use _snprintf or _snprintf_s on
+// MSVC-based platforms.  We map the GTEST_SNPRINTF_ macro to the appropriate
+// function in order to achieve that.  We use macro definition here because
+// snprintf is a variadic function.
+#if _MSC_VER && !GTEST_OS_WINDOWS_MOBILE
+// MSVC 2005 and above support variadic macros.
+# define GTEST_SNPRINTF_(buffer, size, format, ...) \
+     _snprintf_s(buffer, size, size, format, __VA_ARGS__)
+#elif defined(_MSC_VER)
+// Windows CE does not define _snprintf_s
+# define GTEST_SNPRINTF_ _snprintf
+#else
+# define GTEST_SNPRINTF_ snprintf
+#endif
+
+// The biggest signed integer type the compiler supports.
+//
+// long long is guaranteed to be at least 64-bits in C++11.
+using BiggestInt = long long;  // NOLINT
+
+// The maximum number a BiggestInt can represent.
+constexpr BiggestInt kMaxBiggestInt = (std::numeric_limits<BiggestInt>::max)();
+
+// This template class serves as a compile-time function from size to
+// type.  It maps a size in bytes to a primitive type with that
+// size. e.g.
+//
+//   TypeWithSize<4>::UInt
+//
+// is typedef-ed to be unsigned int (unsigned integer made up of 4
+// bytes).
+//
+// Such functionality should belong to STL, but I cannot find it
+// there.
+//
+// Google Test uses this class in the implementation of floating-point
+// comparison.
+//
+// For now it only handles UInt (unsigned int) as that's all Google Test
+// needs.  Other types can be easily added in the future if need
+// arises.
+template <size_t size>
+class TypeWithSize {
+ public:
+  // This prevents the user from using TypeWithSize<N> with incorrect
+  // values of N.
+  using UInt = void;
+};
+
+// The specialization for size 4.
+template <>
+class TypeWithSize<4> {
+ public:
+  using Int = std::int32_t;
+  using UInt = std::uint32_t;
+};
+
+// The specialization for size 8.
+template <>
+class TypeWithSize<8> {
+ public:
+  using Int = std::int64_t;
+  using UInt = std::uint64_t;
+};
+
+// Integer types of known sizes.
+using TimeInMillis = int64_t;  // Represents time in milliseconds.
+
+// Utilities for command line flags and environment variables.
+
+// Macro for referencing flags.
+#if !defined(GTEST_FLAG)
+# define GTEST_FLAG(name) FLAGS_gtest_##name
+#endif  // !defined(GTEST_FLAG)
+
+#if !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
+# define GTEST_USE_OWN_FLAGFILE_FLAG_ 1
+#endif  // !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
+
+#if !defined(GTEST_DECLARE_bool_)
+# define GTEST_FLAG_SAVER_ ::testing::internal::GTestFlagSaver
+
+// Macros for declaring flags.
+# define GTEST_DECLARE_bool_(name) GTEST_API_ extern bool GTEST_FLAG(name)
+# define GTEST_DECLARE_int32_(name) \
+    GTEST_API_ extern std::int32_t GTEST_FLAG(name)
+# define GTEST_DECLARE_string_(name) \
+    GTEST_API_ extern ::std::string GTEST_FLAG(name)
+
+// Macros for defining flags.
+# define GTEST_DEFINE_bool_(name, default_val, doc) \
+    GTEST_API_ bool GTEST_FLAG(name) = (default_val)
+# define GTEST_DEFINE_int32_(name, default_val, doc) \
+    GTEST_API_ std::int32_t GTEST_FLAG(name) = (default_val)
+# define GTEST_DEFINE_string_(name, default_val, doc) \
+    GTEST_API_ ::std::string GTEST_FLAG(name) = (default_val)
+
+#endif  // !defined(GTEST_DECLARE_bool_)
+
+// Thread annotations
+#if !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
+# define GTEST_EXCLUSIVE_LOCK_REQUIRED_(locks)
+# define GTEST_LOCK_EXCLUDED_(locks)
+#endif  // !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
+
+// Parses 'str' for a 32-bit signed integer.  If successful, writes the result
+// to *value and returns true; otherwise leaves *value unchanged and returns
+// false.
+GTEST_API_ bool ParseInt32(const Message& src_text, const char* str,
+                           int32_t* value);
+
+// Parses a bool/int32_t/string from the environment variable
+// corresponding to the given Google Test flag.
+bool BoolFromGTestEnv(const char* flag, bool default_val);
+GTEST_API_ int32_t Int32FromGTestEnv(const char* flag, int32_t default_val);
+std::string OutputFlagAlsoCheckEnvVar();
+const char* StringFromGTestEnv(const char* flag, const char* default_val);
+
+}  // namespace internal
+}  // namespace testing
+
+#if !defined(GTEST_INTERNAL_DEPRECATED)
+
+// Internal Macro to mark an API deprecated, for googletest usage only
+// Usage: class GTEST_INTERNAL_DEPRECATED(message) MyClass or
+// GTEST_INTERNAL_DEPRECATED(message) <return_type> myFunction(); Every usage of
+// a deprecated entity will trigger a warning when compiled with
+// `-Wdeprecated-declarations` option (clang, gcc, any __GNUC__ compiler).
+// For msvc /W3 option will need to be used
+// Note that for 'other' compilers this macro evaluates to nothing to prevent
+// compilations errors.
+#if defined(_MSC_VER)
+#define GTEST_INTERNAL_DEPRECATED(message) __declspec(deprecated(message))
+#elif defined(__GNUC__)
+#define GTEST_INTERNAL_DEPRECATED(message) __attribute__((deprecated(message)))
+#else
+#define GTEST_INTERNAL_DEPRECATED(message)
+#endif
+
+#endif  // !defined(GTEST_INTERNAL_DEPRECATED)
+
+#if GTEST_HAS_ABSL
+// Always use absl::any for UniversalPrinter<> specializations if googletest
+// is built with absl support.
+#define GTEST_INTERNAL_HAS_ANY 1
+#include "absl/types/any.h"
+namespace testing {
+namespace internal {
+using Any = ::absl::any;
+}  // namespace internal
+}  // namespace testing
+#else
+#ifdef __has_include
+#if __has_include(<any>) && __cplusplus >= 201703L
+// Otherwise for C++17 and higher use std::any for UniversalPrinter<>
+// specializations.
+#define GTEST_INTERNAL_HAS_ANY 1
+#include <any>
+namespace testing {
+namespace internal {
+using Any = ::std::any;
+}  // namespace internal
+}  // namespace testing
+// The case where absl is configured NOT to alias std::any is not
+// supported.
+#endif  // __has_include(<any>) && __cplusplus >= 201703L
+#endif  // __has_include
+#endif  // GTEST_HAS_ABSL
+
+#if GTEST_HAS_ABSL
+// Always use absl::optional for UniversalPrinter<> specializations if
+// googletest is built with absl support.
+#define GTEST_INTERNAL_HAS_OPTIONAL 1
+#include "absl/types/optional.h"
+namespace testing {
+namespace internal {
+template <typename T>
+using Optional = ::absl::optional<T>;
+}  // namespace internal
+}  // namespace testing
+#else
+#ifdef __has_include
+#if __has_include(<optional>) && __cplusplus >= 201703L
+// Otherwise for C++17 and higher use std::optional for UniversalPrinter<>
+// specializations.
+#define GTEST_INTERNAL_HAS_OPTIONAL 1
+#include <optional>
+namespace testing {
+namespace internal {
+template <typename T>
+using Optional = ::std::optional<T>;
+}  // namespace internal
+}  // namespace testing
+// The case where absl is configured NOT to alias std::optional is not
+// supported.
+#endif  // __has_include(<optional>) && __cplusplus >= 201703L
+#endif  // __has_include
+#endif  // GTEST_HAS_ABSL
+
+#if GTEST_HAS_ABSL
+// Always use absl::string_view for Matcher<> specializations if googletest
+// is built with absl support.
+# define GTEST_INTERNAL_HAS_STRING_VIEW 1
+#include "absl/strings/string_view.h"
+namespace testing {
+namespace internal {
+using StringView = ::absl::string_view;
+}  // namespace internal
+}  // namespace testing
+#else
+# ifdef __has_include
+#   if __has_include(<string_view>) && __cplusplus >= 201703L
+// Otherwise for C++17 and higher use std::string_view for Matcher<>
+// specializations.
+#   define GTEST_INTERNAL_HAS_STRING_VIEW 1
+#include <string_view>
+namespace testing {
+namespace internal {
+using StringView = ::std::string_view;
+}  // namespace internal
+}  // namespace testing
+// The case where absl is configured NOT to alias std::string_view is not
+// supported.
+#  endif  // __has_include(<string_view>) && __cplusplus >= 201703L
+# endif  // __has_include
+#endif  // GTEST_HAS_ABSL
+
+#if GTEST_HAS_ABSL
+// Always use absl::variant for UniversalPrinter<> specializations if googletest
+// is built with absl support.
+#define GTEST_INTERNAL_HAS_VARIANT 1
+#include "absl/types/variant.h"
+namespace testing {
+namespace internal {
+template <typename... T>
+using Variant = ::absl::variant<T...>;
+}  // namespace internal
+}  // namespace testing
+#else
+#ifdef __has_include
+#if __has_include(<variant>) && __cplusplus >= 201703L
+// Otherwise for C++17 and higher use std::variant for UniversalPrinter<>
+// specializations.
+#define GTEST_INTERNAL_HAS_VARIANT 1
+#include <variant>
+namespace testing {
+namespace internal {
+template <typename... T>
+using Variant = ::std::variant<T...>;
+}  // namespace internal
+}  // namespace testing
+// The case where absl is configured NOT to alias std::variant is not supported.
+#endif  // __has_include(<variant>) && __cplusplus >= 201703L
+#endif  // __has_include
+#endif  // GTEST_HAS_ABSL
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
+
+#if GTEST_OS_LINUX
+# include <stdlib.h>
+# include <sys/types.h>
+# include <sys/wait.h>
+# include <unistd.h>
+#endif  // GTEST_OS_LINUX
+
+#if GTEST_HAS_EXCEPTIONS
+# include <stdexcept>
+#endif
+
+#include <ctype.h>
+#include <float.h>
+#include <string.h>
+#include <cstdint>
+#include <iomanip>
+#include <limits>
+#include <map>
+#include <set>
+#include <string>
+#include <type_traits>
+#include <vector>
+
+// Copyright 2005, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//
+// The Google C++ Testing and Mocking Framework (Google Test)
+//
+// This header file defines the Message class.
+//
+// IMPORTANT NOTE: Due to limitation of the C++ language, we have to
+// leave some internal implementation details in this header file.
+// They are clearly marked by comments like this:
+//
+//   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+//
+// Such code is NOT meant to be used by a user directly, and is subject
+// to CHANGE WITHOUT NOTICE.  Therefore DO NOT DEPEND ON IT in a user
+// program!
+
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
+#define GOOGLETEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
+
+#include <limits>
+#include <memory>
+#include <sstream>
+
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
+/* class A needs to have dll-interface to be used by clients of class B */)
+
+// Ensures that there is at least one operator<< in the global namespace.
+// See Message& operator<<(...) below for why.
+void operator<<(const testing::internal::Secret&, int);
+
+namespace testing {
+
+// The Message class works like an ostream repeater.
+//
+// Typical usage:
+//
+//   1. You stream a bunch of values to a Message object.
+//      It will remember the text in a stringstream.
+//   2. Then you stream the Message object to an ostream.
+//      This causes the text in the Message to be streamed
+//      to the ostream.
+//
+// For example;
+//
+//   testing::Message foo;
+//   foo << 1 << " != " << 2;
+//   std::cout << foo;
+//
+// will print "1 != 2".
+//
+// Message is not intended to be inherited from.  In particular, its
+// destructor is not virtual.
+//
+// Note that stringstream behaves differently in gcc and in MSVC.  You
+// can stream a NULL char pointer to it in the former, but not in the
+// latter (it causes an access violation if you do).  The Message
+// class hides this difference by treating a NULL char pointer as
+// "(null)".
+class GTEST_API_ Message {
+ private:
+  // The type of basic IO manipulators (endl, ends, and flush) for
+  // narrow streams.
+  typedef std::ostream& (*BasicNarrowIoManip)(std::ostream&);
+
+ public:
+  // Constructs an empty Message.
+  Message();
+
+  // Copy constructor.
+  Message(const Message& msg) : ss_(new ::std::stringstream) {  // NOLINT
+    *ss_ << msg.GetString();
+  }
+
+  // Constructs a Message from a C-string.
+  explicit Message(const char* str) : ss_(new ::std::stringstream) {
+    *ss_ << str;
+  }
+
+  // Streams a non-pointer value to this object.
+  template <typename T>
+  inline Message& operator <<(const T& val) {
+    // Some libraries overload << for STL containers.  These
+    // overloads are defined in the global namespace instead of ::std.
+    //
+    // C++'s symbol lookup rule (i.e. Koenig lookup) says that these
+    // overloads are visible in either the std namespace or the global
+    // namespace, but not other namespaces, including the testing
+    // namespace which Google Test's Message class is in.
+    //
+    // To allow STL containers (and other types that has a << operator
+    // defined in the global namespace) to be used in Google Test
+    // assertions, testing::Message must access the custom << operator
+    // from the global namespace.  With this using declaration,
+    // overloads of << defined in the global namespace and those
+    // visible via Koenig lookup are both exposed in this function.
+    using ::operator <<;
+    *ss_ << val;
+    return *this;
+  }
+
+  // Streams a pointer value to this object.
+  //
+  // This function is an overload of the previous one.  When you
+  // stream a pointer to a Message, this definition will be used as it
+  // is more specialized.  (The C++ Standard, section
+  // [temp.func.order].)  If you stream a non-pointer, then the
+  // previous definition will be used.
+  //
+  // The reason for this overload is that streaming a NULL pointer to
+  // ostream is undefined behavior.  Depending on the compiler, you
+  // may get "0", "(nil)", "(null)", or an access violation.  To
+  // ensure consistent result across compilers, we always treat NULL
+  // as "(null)".
+  template <typename T>
+  inline Message& operator <<(T* const& pointer) {  // NOLINT
+    if (pointer == nullptr) {
+      *ss_ << "(null)";
+    } else {
+      *ss_ << pointer;
+    }
+    return *this;
+  }
+
+  // Since the basic IO manipulators are overloaded for both narrow
+  // and wide streams, we have to provide this specialized definition
+  // of operator <<, even though its body is the same as the
+  // templatized version above.  Without this definition, streaming
+  // endl or other basic IO manipulators to Message will confuse the
+  // compiler.
+  Message& operator <<(BasicNarrowIoManip val) {
+    *ss_ << val;
+    return *this;
+  }
+
+  // Instead of 1/0, we want to see true/false for bool values.
+  Message& operator <<(bool b) {
+    return *this << (b ? "true" : "false");
+  }
+
+  // These two overloads allow streaming a wide C string to a Message
+  // using the UTF-8 encoding.
+  Message& operator <<(const wchar_t* wide_c_str);
+  Message& operator <<(wchar_t* wide_c_str);
+
+#if GTEST_HAS_STD_WSTRING
+  // Converts the given wide string to a narrow string using the UTF-8
+  // encoding, and streams the result to this Message object.
+  Message& operator <<(const ::std::wstring& wstr);
+#endif  // GTEST_HAS_STD_WSTRING
+
+  // Gets the text streamed to this object so far as an std::string.
+  // Each '\0' character in the buffer is replaced with "\\0".
+  //
+  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+  std::string GetString() const;
+
+ private:
+  // We'll hold the text streamed to this object here.
+  const std::unique_ptr< ::std::stringstream> ss_;
+
+  // We declare (but don't implement) this to prevent the compiler
+  // from implementing the assignment operator.
+  void operator=(const Message&);
+};
+
+// Streams a Message to an ostream.
+inline std::ostream& operator <<(std::ostream& os, const Message& sb) {
+  return os << sb.GetString();
+}
+
+namespace internal {
+
+// Converts a streamable value to an std::string.  A NULL pointer is
+// converted to "(null)".  When the input value is a ::string,
+// ::std::string, ::wstring, or ::std::wstring object, each NUL
+// character in it is replaced with "\\0".
+template <typename T>
+std::string StreamableToString(const T& streamable) {
+  return (Message() << streamable).GetString();
+}
+
+}  // namespace internal
+}  // namespace testing
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Google Test filepath utilities
+//
+// This header file declares classes and functions used internally by
+// Google Test.  They are subject to change without notice.
+//
+// This file is #included in gtest/internal/gtest-internal.h.
+// Do not include this header file separately!
+
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
+#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
+
+// Copyright 2005, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// The Google C++ Testing and Mocking Framework (Google Test)
+//
+// This header file declares the String class and functions used internally by
+// Google Test.  They are subject to change without notice. They should not used
+// by code external to Google Test.
+//
+// This header file is #included by gtest-internal.h.
+// It should not be #included by other files.
+
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
+#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
+
+#ifdef __BORLANDC__
+// string.h is not guaranteed to provide strcpy on C++ Builder.
+# include <mem.h>
+#endif
+
+#include <string.h>
+#include <cstdint>
+#include <string>
+
+
+namespace testing {
+namespace internal {
+
+// String - an abstract class holding static string utilities.
+class GTEST_API_ String {
+ public:
+  // Static utility methods
+
+  // Clones a 0-terminated C string, allocating memory using new.  The
+  // caller is responsible for deleting the return value using
+  // delete[].  Returns the cloned string, or NULL if the input is
+  // NULL.
+  //
+  // This is different from strdup() in string.h, which allocates
+  // memory using malloc().
+  static const char* CloneCString(const char* c_str);
+
+#if GTEST_OS_WINDOWS_MOBILE
+  // Windows CE does not have the 'ANSI' versions of Win32 APIs. To be
+  // able to pass strings to Win32 APIs on CE we need to convert them
+  // to 'Unicode', UTF-16.
+
+  // Creates a UTF-16 wide string from the given ANSI string, allocating
+  // memory using new. The caller is responsible for deleting the return
+  // value using delete[]. Returns the wide string, or NULL if the
+  // input is NULL.
+  //
+  // The wide string is created using the ANSI codepage (CP_ACP) to
+  // match the behaviour of the ANSI versions of Win32 calls and the
+  // C runtime.
+  static LPCWSTR AnsiToUtf16(const char* c_str);
+
+  // Creates an ANSI string from the given wide string, allocating
+  // memory using new. The caller is responsible for deleting the return
+  // value using delete[]. Returns the ANSI string, or NULL if the
+  // input is NULL.
+  //
+  // The returned string is created using the ANSI codepage (CP_ACP) to
+  // match the behaviour of the ANSI versions of Win32 calls and the
+  // C runtime.
+  static const char* Utf16ToAnsi(LPCWSTR utf16_str);
+#endif
+
+  // Compares two C strings.  Returns true if and only if they have the same
+  // content.
+  //
+  // Unlike strcmp(), this function can handle NULL argument(s).  A
+  // NULL C string is considered different to any non-NULL C string,
+  // including the empty string.
+  static bool CStringEquals(const char* lhs, const char* rhs);
+
+  // Converts a wide C string to a String using the UTF-8 encoding.
+  // NULL will be converted to "(null)".  If an error occurred during
+  // the conversion, "(failed to convert from wide string)" is
+  // returned.
+  static std::string ShowWideCString(const wchar_t* wide_c_str);
+
+  // Compares two wide C strings.  Returns true if and only if they have the
+  // same content.
+  //
+  // Unlike wcscmp(), this function can handle NULL argument(s).  A
+  // NULL C string is considered different to any non-NULL C string,
+  // including the empty string.
+  static bool WideCStringEquals(const wchar_t* lhs, const wchar_t* rhs);
+
+  // Compares two C strings, ignoring case.  Returns true if and only if
+  // they have the same content.
+  //
+  // Unlike strcasecmp(), this function can handle NULL argument(s).
+  // A NULL C string is considered different to any non-NULL C string,
+  // including the empty string.
+  static bool CaseInsensitiveCStringEquals(const char* lhs,
+                                           const char* rhs);
+
+  // Compares two wide C strings, ignoring case.  Returns true if and only if
+  // they have the same content.
+  //
+  // Unlike wcscasecmp(), this function can handle NULL argument(s).
+  // A NULL C string is considered different to any non-NULL wide C string,
+  // including the empty string.
+  // NB: The implementations on different platforms slightly differ.
+  // On windows, this method uses _wcsicmp which compares according to LC_CTYPE
+  // environment variable. On GNU platform this method uses wcscasecmp
+  // which compares according to LC_CTYPE category of the current locale.
+  // On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
+  // current locale.
+  static bool CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
+                                               const wchar_t* rhs);
+
+  // Returns true if and only if the given string ends with the given suffix,
+  // ignoring case. Any string is considered to end with an empty suffix.
+  static bool EndsWithCaseInsensitive(
+      const std::string& str, const std::string& suffix);
+
+  // Formats an int value as "%02d".
+  static std::string FormatIntWidth2(int value);  // "%02d" for width == 2
+
+  // Formats an int value to given width with leading zeros.
+  static std::string FormatIntWidthN(int value, int width);
+
+  // Formats an int value as "%X".
+  static std::string FormatHexInt(int value);
+
+  // Formats an int value as "%X".
+  static std::string FormatHexUInt32(uint32_t value);
+
+  // Formats a byte as "%02X".
+  static std::string FormatByte(unsigned char value);
+
+ private:
+  String();  // Not meant to be instantiated.
+};  // class String
+
+// Gets the content of the stringstream's buffer as an std::string.  Each '\0'
+// character in the buffer is replaced with "\\0".
+GTEST_API_ std::string StringStreamToString(::std::stringstream* stream);
+
+}  // namespace internal
+}  // namespace testing
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
+/* class A needs to have dll-interface to be used by clients of class B */)
+
+namespace testing {
+namespace internal {
+
+// FilePath - a class for file and directory pathname manipulation which
+// handles platform-specific conventions (like the pathname separator).
+// Used for helper functions for naming files in a directory for xml output.
+// Except for Set methods, all methods are const or static, which provides an
+// "immutable value object" -- useful for peace of mind.
+// A FilePath with a value ending in a path separator ("like/this/") represents
+// a directory, otherwise it is assumed to represent a file. In either case,
+// it may or may not represent an actual file or directory in the file system.
+// Names are NOT checked for syntax correctness -- no checking for illegal
+// characters, malformed paths, etc.
+
+class GTEST_API_ FilePath {
+ public:
+  FilePath() : pathname_("") { }
+  FilePath(const FilePath& rhs) : pathname_(rhs.pathname_) { }
+
+  explicit FilePath(const std::string& pathname) : pathname_(pathname) {
+    Normalize();
+  }
+
+  FilePath& operator=(const FilePath& rhs) {
+    Set(rhs);
+    return *this;
+  }
+
+  void Set(const FilePath& rhs) {
+    pathname_ = rhs.pathname_;
+  }
+
+  const std::string& string() const { return pathname_; }
+  const char* c_str() const { return pathname_.c_str(); }
+
+  // Returns the current working directory, or "" if unsuccessful.
+  static FilePath GetCurrentDir();
+
+  // Given directory = "dir", base_name = "test", number = 0,
+  // extension = "xml", returns "dir/test.xml". If number is greater
+  // than zero (e.g., 12), returns "dir/test_12.xml".
+  // On Windows platform, uses \ as the separator rather than /.
+  static FilePath MakeFileName(const FilePath& directory,
+                               const FilePath& base_name,
+                               int number,
+                               const char* extension);
+
+  // Given directory = "dir", relative_path = "test.xml",
+  // returns "dir/test.xml".
+  // On Windows, uses \ as the separator rather than /.
+  static FilePath ConcatPaths(const FilePath& directory,
+                              const FilePath& relative_path);
+
+  // Returns a pathname for a file that does not currently exist. The pathname
+  // will be directory/base_name.extension or
+  // directory/base_name_<number>.extension if directory/base_name.extension
+  // already exists. The number will be incremented until a pathname is found
+  // that does not already exist.
+  // Examples: 'dir/foo_test.xml' or 'dir/foo_test_1.xml'.
+  // There could be a race condition if two or more processes are calling this
+  // function at the same time -- they could both pick the same filename.
+  static FilePath GenerateUniqueFileName(const FilePath& directory,
+                                         const FilePath& base_name,
+                                         const char* extension);
+
+  // Returns true if and only if the path is "".
+  bool IsEmpty() const { return pathname_.empty(); }
+
+  // If input name has a trailing separator character, removes it and returns
+  // the name, otherwise return the name string unmodified.
+  // On Windows platform, uses \ as the separator, other platforms use /.
+  FilePath RemoveTrailingPathSeparator() const;
+
+  // Returns a copy of the FilePath with the directory part removed.
+  // Example: FilePath("path/to/file").RemoveDirectoryName() returns
+  // FilePath("file"). If there is no directory part ("just_a_file"), it returns
+  // the FilePath unmodified. If there is no file part ("just_a_dir/") it
+  // returns an empty FilePath ("").
+  // On Windows platform, '\' is the path separator, otherwise it is '/'.
+  FilePath RemoveDirectoryName() const;
+
+  // RemoveFileName returns the directory path with the filename removed.
+  // Example: FilePath("path/to/file").RemoveFileName() returns "path/to/".
+  // If the FilePath is "a_file" or "/a_file", RemoveFileName returns
+  // FilePath("./") or, on Windows, FilePath(".\\"). If the filepath does
+  // not have a file, like "just/a/dir/", it returns the FilePath unmodified.
+  // On Windows platform, '\' is the path separator, otherwise it is '/'.
+  FilePath RemoveFileName() const;
+
+  // Returns a copy of the FilePath with the case-insensitive extension removed.
+  // Example: FilePath("dir/file.exe").RemoveExtension("EXE") returns
+  // FilePath("dir/file"). If a case-insensitive extension is not
+  // found, returns a copy of the original FilePath.
+  FilePath RemoveExtension(const char* extension) const;
+
+  // Creates directories so that path exists. Returns true if successful or if
+  // the directories already exist; returns false if unable to create
+  // directories for any reason. Will also return false if the FilePath does
+  // not represent a directory (that is, it doesn't end with a path separator).
+  bool CreateDirectoriesRecursively() const;
+
+  // Create the directory so that path exists. Returns true if successful or
+  // if the directory already exists; returns false if unable to create the
+  // directory for any reason, including if the parent directory does not
+  // exist. Not named "CreateDirectory" because that's a macro on Windows.
+  bool CreateFolder() const;
+
+  // Returns true if FilePath describes something in the file-system,
+  // either a file, directory, or whatever, and that something exists.
+  bool FileOrDirectoryExists() const;
+
+  // Returns true if pathname describes a directory in the file-system
+  // that exists.
+  bool DirectoryExists() const;
+
+  // Returns true if FilePath ends with a path separator, which indicates that
+  // it is intended to represent a directory. Returns false otherwise.
+  // This does NOT check that a directory (or file) actually exists.
+  bool IsDirectory() const;
+
+  // Returns true if pathname describes a root directory. (Windows has one
+  // root directory per disk drive.)
+  bool IsRootDirectory() const;
+
+  // Returns true if pathname describes an absolute path.
+  bool IsAbsolutePath() const;
+
+ private:
+  // Replaces multiple consecutive separators with a single separator.
+  // For example, "bar///foo" becomes "bar/foo". Does not eliminate other
+  // redundancies that might be in a pathname involving "." or "..".
+  //
+  // A pathname with multiple consecutive separators may occur either through
+  // user error or as a result of some scripts or APIs that generate a pathname
+  // with a trailing separator. On other platforms the same API or script
+  // may NOT generate a pathname with a trailing "/". Then elsewhere that
+  // pathname may have another "/" and pathname components added to it,
+  // without checking for the separator already being there.
+  // The script language and operating system may allow paths like "foo//bar"
+  // but some of the functions in FilePath will not handle that correctly. In
+  // particular, RemoveTrailingPathSeparator() only removes one separator, and
+  // it is called in CreateDirectoriesRecursively() assuming that it will change
+  // a pathname from directory syntax (trailing separator) to filename syntax.
+  //
+  // On Windows this method also replaces the alternate path separator '/' with
+  // the primary path separator '\\', so that for example "bar\\/\\foo" becomes
+  // "bar\\foo".
+
+  void Normalize();
+
+  // Returns a pointer to the last occurrence of a valid path separator in
+  // the FilePath. On Windows, for example, both '/' and '\' are valid path
+  // separators. Returns NULL if no path separator was found.
+  const char* FindLastPathSeparator() const;
+
+  std::string pathname_;
+};  // class FilePath
+
+}  // namespace internal
+}  // namespace testing
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
+// Copyright 2008 Google Inc.
+// All Rights Reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Type utilities needed for implementing typed and type-parameterized
+// tests.
+
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
+#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
+
+
+// #ifdef __GNUC__ is too general here.  It is possible to use gcc without using
+// libstdc++ (which is where cxxabi.h comes from).
+# if GTEST_HAS_CXXABI_H_
+#  include <cxxabi.h>
+# elif defined(__HP_aCC)
+#  include <acxx_demangle.h>
+# endif  // GTEST_HASH_CXXABI_H_
+
+namespace testing {
+namespace internal {
+
+// Canonicalizes a given name with respect to the Standard C++ Library.
+// This handles removing the inline namespace within `std` that is
+// used by various standard libraries (e.g., `std::__1`).  Names outside
+// of namespace std are returned unmodified.
+inline std::string CanonicalizeForStdLibVersioning(std::string s) {
+  static const char prefix[] = "std::__";
+  if (s.compare(0, strlen(prefix), prefix) == 0) {
+    std::string::size_type end = s.find("::", strlen(prefix));
+    if (end != s.npos) {
+      // Erase everything between the initial `std` and the second `::`.
+      s.erase(strlen("std"), end - strlen("std"));
+    }
+  }
+  return s;
+}
+
+#if GTEST_HAS_RTTI
+// GetTypeName(const std::type_info&) returns a human-readable name of type T.
+inline std::string GetTypeName(const std::type_info& type) {
+  const char* const name = type.name();
+#if GTEST_HAS_CXXABI_H_ || defined(__HP_aCC)
+  int status = 0;
+  // gcc's implementation of typeid(T).name() mangles the type name,
+  // so we have to demangle it.
+#if GTEST_HAS_CXXABI_H_
+  using abi::__cxa_demangle;
+#endif  // GTEST_HAS_CXXABI_H_
+  char* const readable_name = __cxa_demangle(name, nullptr, nullptr, &status);
+  const std::string name_str(status == 0 ? readable_name : name);
+  free(readable_name);
+  return CanonicalizeForStdLibVersioning(name_str);
+#else
+  return name;
+#endif  // GTEST_HAS_CXXABI_H_ || __HP_aCC
+}
+#endif  // GTEST_HAS_RTTI
+
+// GetTypeName<T>() returns a human-readable name of type T if and only if
+// RTTI is enabled, otherwise it returns a dummy type name.
+// NB: This function is also used in Google Mock, so don't move it inside of
+// the typed-test-only section below.
+template <typename T>
+std::string GetTypeName() {
+#if GTEST_HAS_RTTI
+  return GetTypeName(typeid(T));
+#else
+  return "<type>";
+#endif  // GTEST_HAS_RTTI
+}
+
+// A unique type indicating an empty node
+struct None {};
+
+# define GTEST_TEMPLATE_ template <typename T> class
+
+// The template "selector" struct TemplateSel<Tmpl> is used to
+// represent Tmpl, which must be a class template with one type
+// parameter, as a type.  TemplateSel<Tmpl>::Bind<T>::type is defined
+// as the type Tmpl<T>.  This allows us to actually instantiate the
+// template "selected" by TemplateSel<Tmpl>.
+//
+// This trick is necessary for simulating typedef for class templates,
+// which C++ doesn't support directly.
+template <GTEST_TEMPLATE_ Tmpl>
+struct TemplateSel {
+  template <typename T>
+  struct Bind {
+    typedef Tmpl<T> type;
+  };
+};
+
+# define GTEST_BIND_(TmplSel, T) \
+  TmplSel::template Bind<T>::type
+
+template <GTEST_TEMPLATE_ Head_, GTEST_TEMPLATE_... Tail_>
+struct Templates {
+  using Head = TemplateSel<Head_>;
+  using Tail = Templates<Tail_...>;
+};
+
+template <GTEST_TEMPLATE_ Head_>
+struct Templates<Head_> {
+  using Head = TemplateSel<Head_>;
+  using Tail = None;
+};
+
+// Tuple-like type lists
+template <typename Head_, typename... Tail_>
+struct Types {
+  using Head = Head_;
+  using Tail = Types<Tail_...>;
+};
+
+template <typename Head_>
+struct Types<Head_> {
+  using Head = Head_;
+  using Tail = None;
+};
+
+// Helper metafunctions to tell apart a single type from types
+// generated by ::testing::Types
+template <typename... Ts>
+struct ProxyTypeList {
+  using type = Types<Ts...>;
+};
+
+template <typename>
+struct is_proxy_type_list : std::false_type {};
+
+template <typename... Ts>
+struct is_proxy_type_list<ProxyTypeList<Ts...>> : std::true_type {};
+
+// Generator which conditionally creates type lists.
+// It recognizes if a requested type list should be created
+// and prevents creating a new type list nested within another one.
+template <typename T>
+struct GenerateTypeList {
+ private:
+  using proxy = typename std::conditional<is_proxy_type_list<T>::value, T,
+                                          ProxyTypeList<T>>::type;
+
+ public:
+  using type = typename proxy::type;
+};
+
+}  // namespace internal
+
+template <typename... Ts>
+using Types = internal::ProxyTypeList<Ts...>;
+
+}  // namespace testing
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
+
+// Due to C++ preprocessor weirdness, we need double indirection to
+// concatenate two tokens when one of them is __LINE__.  Writing
+//
+//   foo ## __LINE__
+//
+// will result in the token foo__LINE__, instead of foo followed by
+// the current line number.  For more details, see
+// http://www.parashift.com/c++-faq-lite/misc-technical-issues.html#faq-39.6
+#define GTEST_CONCAT_TOKEN_(foo, bar) GTEST_CONCAT_TOKEN_IMPL_(foo, bar)
+#define GTEST_CONCAT_TOKEN_IMPL_(foo, bar) foo ## bar
+
+// Stringifies its argument.
+// Work around a bug in visual studio which doesn't accept code like this:
+//
+//   #define GTEST_STRINGIFY_(name) #name
+//   #define MACRO(a, b, c) ... GTEST_STRINGIFY_(a) ...
+//   MACRO(, x, y)
+//
+// Complaining about the argument to GTEST_STRINGIFY_ being empty.
+// This is allowed by the spec.
+#define GTEST_STRINGIFY_HELPER_(name, ...) #name
+#define GTEST_STRINGIFY_(...) GTEST_STRINGIFY_HELPER_(__VA_ARGS__, )
+
+namespace proto2 {
+class MessageLite;
+}
+
+namespace testing {
+
+// Forward declarations.
+
+class AssertionResult;                 // Result of an assertion.
+class Message;                         // Represents a failure message.
+class Test;                            // Represents a test.
+class TestInfo;                        // Information about a test.
+class TestPartResult;                  // Result of a test part.
+class UnitTest;                        // A collection of test suites.
+
+template <typename T>
+::std::string PrintToString(const T& value);
+
+namespace internal {
+
+struct TraceInfo;                      // Information about a trace point.
+class TestInfoImpl;                    // Opaque implementation of TestInfo
+class UnitTestImpl;                    // Opaque implementation of UnitTest
+
+// The text used in failure messages to indicate the start of the
+// stack trace.
+GTEST_API_ extern const char kStackTraceMarker[];
+
+// An IgnoredValue object can be implicitly constructed from ANY value.
+class IgnoredValue {
+  struct Sink {};
+ public:
+  // This constructor template allows any value to be implicitly
+  // converted to IgnoredValue.  The object has no data member and
+  // doesn't try to remember anything about the argument.  We
+  // deliberately omit the 'explicit' keyword in order to allow the
+  // conversion to be implicit.
+  // Disable the conversion if T already has a magical conversion operator.
+  // Otherwise we get ambiguity.
+  template <typename T,
+            typename std::enable_if<!std::is_convertible<T, Sink>::value,
+                                    int>::type = 0>
+  IgnoredValue(const T& /* ignored */) {}  // NOLINT(runtime/explicit)
+};
+
+// Appends the user-supplied message to the Google-Test-generated message.
+GTEST_API_ std::string AppendUserMessage(
+    const std::string& gtest_msg, const Message& user_msg);
+
+#if GTEST_HAS_EXCEPTIONS
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4275 \
+/* an exported class was derived from a class that was not exported */)
+
+// This exception is thrown by (and only by) a failed Google Test
+// assertion when GTEST_FLAG(throw_on_failure) is true (if exceptions
+// are enabled).  We derive it from std::runtime_error, which is for
+// errors presumably detectable only at run time.  Since
+// std::runtime_error inherits from std::exception, many testing
+// frameworks know how to extract and print the message inside it.
+class GTEST_API_ GoogleTestFailureException : public ::std::runtime_error {
+ public:
+  explicit GoogleTestFailureException(const TestPartResult& failure);
+};
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4275
+
+#endif  // GTEST_HAS_EXCEPTIONS
+
+namespace edit_distance {
+// Returns the optimal edits to go from 'left' to 'right'.
+// All edits cost the same, with replace having lower priority than
+// add/remove.
+// Simple implementation of the Wagner-Fischer algorithm.
+// See http://en.wikipedia.org/wiki/Wagner-Fischer_algorithm
+enum EditType { kMatch, kAdd, kRemove, kReplace };
+GTEST_API_ std::vector<EditType> CalculateOptimalEdits(
+    const std::vector<size_t>& left, const std::vector<size_t>& right);
+
+// Same as above, but the input is represented as strings.
+GTEST_API_ std::vector<EditType> CalculateOptimalEdits(
+    const std::vector<std::string>& left,
+    const std::vector<std::string>& right);
+
+// Create a diff of the input strings in Unified diff format.
+GTEST_API_ std::string CreateUnifiedDiff(const std::vector<std::string>& left,
+                                         const std::vector<std::string>& right,
+                                         size_t context = 2);
+
+}  // namespace edit_distance
+
+// Calculate the diff between 'left' and 'right' and return it in unified diff
+// format.
+// If not null, stores in 'total_line_count' the total number of lines found
+// in left + right.
+GTEST_API_ std::string DiffStrings(const std::string& left,
+                                   const std::string& right,
+                                   size_t* total_line_count);
+
+// Constructs and returns the message for an equality assertion
+// (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
+//
+// The first four parameters are the expressions used in the assertion
+// and their values, as strings.  For example, for ASSERT_EQ(foo, bar)
+// where foo is 5 and bar is 6, we have:
+//
+//   expected_expression: "foo"
+//   actual_expression:   "bar"
+//   expected_value:      "5"
+//   actual_value:        "6"
+//
+// The ignoring_case parameter is true if and only if the assertion is a
+// *_STRCASEEQ*.  When it's true, the string " (ignoring case)" will
+// be inserted into the message.
+GTEST_API_ AssertionResult EqFailure(const char* expected_expression,
+                                     const char* actual_expression,
+                                     const std::string& expected_value,
+                                     const std::string& actual_value,
+                                     bool ignoring_case);
+
+// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
+GTEST_API_ std::string GetBoolAssertionFailureMessage(
+    const AssertionResult& assertion_result,
+    const char* expression_text,
+    const char* actual_predicate_value,
+    const char* expected_predicate_value);
+
+// This template class represents an IEEE floating-point number
+// (either single-precision or double-precision, depending on the
+// template parameters).
+//
+// The purpose of this class is to do more sophisticated number
+// comparison.  (Due to round-off error, etc, it's very unlikely that
+// two floating-points will be equal exactly.  Hence a naive
+// comparison by the == operation often doesn't work.)
+//
+// Format of IEEE floating-point:
+//
+//   The most-significant bit being the leftmost, an IEEE
+//   floating-point looks like
+//
+//     sign_bit exponent_bits fraction_bits
+//
+//   Here, sign_bit is a single bit that designates the sign of the
+//   number.
+//
+//   For float, there are 8 exponent bits and 23 fraction bits.
+//
+//   For double, there are 11 exponent bits and 52 fraction bits.
+//
+//   More details can be found at
+//   http://en.wikipedia.org/wiki/IEEE_floating-point_standard.
+//
+// Template parameter:
+//
+//   RawType: the raw floating-point type (either float or double)
+template <typename RawType>
+class FloatingPoint {
+ public:
+  // Defines the unsigned integer type that has the same size as the
+  // floating point number.
+  typedef typename TypeWithSize<sizeof(RawType)>::UInt Bits;
+
+  // Constants.
+
+  // # of bits in a number.
+  static const size_t kBitCount = 8*sizeof(RawType);
+
+  // # of fraction bits in a number.
+  static const size_t kFractionBitCount =
+    std::numeric_limits<RawType>::digits - 1;
+
+  // # of exponent bits in a number.
+  static const size_t kExponentBitCount = kBitCount - 1 - kFractionBitCount;
+
+  // The mask for the sign bit.
+  static const Bits kSignBitMask = static_cast<Bits>(1) << (kBitCount - 1);
+
+  // The mask for the fraction bits.
+  static const Bits kFractionBitMask =
+    ~static_cast<Bits>(0) >> (kExponentBitCount + 1);
+
+  // The mask for the exponent bits.
+  static const Bits kExponentBitMask = ~(kSignBitMask | kFractionBitMask);
+
+  // How many ULP's (Units in the Last Place) we want to tolerate when
+  // comparing two numbers.  The larger the value, the more error we
+  // allow.  A 0 value means that two numbers must be exactly the same
+  // to be considered equal.
+  //
+  // The maximum error of a single floating-point operation is 0.5
+  // units in the last place.  On Intel CPU's, all floating-point
+  // calculations are done with 80-bit precision, while double has 64
+  // bits.  Therefore, 4 should be enough for ordinary use.
+  //
+  // See the following article for more details on ULP:
+  // http://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/
+  static const uint32_t kMaxUlps = 4;
+
+  // Constructs a FloatingPoint from a raw floating-point number.
+  //
+  // On an Intel CPU, passing a non-normalized NAN (Not a Number)
+  // around may change its bits, although the new value is guaranteed
+  // to be also a NAN.  Therefore, don't expect this constructor to
+  // preserve the bits in x when x is a NAN.
+  explicit FloatingPoint(const RawType& x) { u_.value_ = x; }
+
+  // Static methods
+
+  // Reinterprets a bit pattern as a floating-point number.
+  //
+  // This function is needed to test the AlmostEquals() method.
+  static RawType ReinterpretBits(const Bits bits) {
+    FloatingPoint fp(0);
+    fp.u_.bits_ = bits;
+    return fp.u_.value_;
+  }
+
+  // Returns the floating-point number that represent positive infinity.
+  static RawType Infinity() {
+    return ReinterpretBits(kExponentBitMask);
+  }
+
+  // Returns the maximum representable finite floating-point number.
+  static RawType Max();
+
+  // Non-static methods
+
+  // Returns the bits that represents this number.
+  const Bits &bits() const { return u_.bits_; }
+
+  // Returns the exponent bits of this number.
+  Bits exponent_bits() const { return kExponentBitMask & u_.bits_; }
+
+  // Returns the fraction bits of this number.
+  Bits fraction_bits() const { return kFractionBitMask & u_.bits_; }
+
+  // Returns the sign bit of this number.
+  Bits sign_bit() const { return kSignBitMask & u_.bits_; }
+
+  // Returns true if and only if this is NAN (not a number).
+  bool is_nan() const {
+    // It's a NAN if the exponent bits are all ones and the fraction
+    // bits are not entirely zeros.
+    return (exponent_bits() == kExponentBitMask) && (fraction_bits() != 0);
+  }
+
+  // Returns true if and only if this number is at most kMaxUlps ULP's away
+  // from rhs.  In particular, this function:
+  //
+  //   - returns false if either number is (or both are) NAN.
+  //   - treats really large numbers as almost equal to infinity.
+  //   - thinks +0.0 and -0.0 are 0 DLP's apart.
+  bool AlmostEquals(const FloatingPoint& rhs) const {
+    // The IEEE standard says that any comparison operation involving
+    // a NAN must return false.
+    if (is_nan() || rhs.is_nan()) return false;
+
+    return DistanceBetweenSignAndMagnitudeNumbers(u_.bits_, rhs.u_.bits_)
+        <= kMaxUlps;
+  }
+
+ private:
+  // The data type used to store the actual floating-point number.
+  union FloatingPointUnion {
+    RawType value_;  // The raw floating-point number.
+    Bits bits_;      // The bits that represent the number.
+  };
+
+  // Converts an integer from the sign-and-magnitude representation to
+  // the biased representation.  More precisely, let N be 2 to the
+  // power of (kBitCount - 1), an integer x is represented by the
+  // unsigned number x + N.
+  //
+  // For instance,
+  //
+  //   -N + 1 (the most negative number representable using
+  //          sign-and-magnitude) is represented by 1;
+  //   0      is represented by N; and
+  //   N - 1  (the biggest number representable using
+  //          sign-and-magnitude) is represented by 2N - 1.
+  //
+  // Read http://en.wikipedia.org/wiki/Signed_number_representations
+  // for more details on signed number representations.
+  static Bits SignAndMagnitudeToBiased(const Bits &sam) {
+    if (kSignBitMask & sam) {
+      // sam represents a negative number.
+      return ~sam + 1;
+    } else {
+      // sam represents a positive number.
+      return kSignBitMask | sam;
+    }
+  }
+
+  // Given two numbers in the sign-and-magnitude representation,
+  // returns the distance between them as an unsigned number.
+  static Bits DistanceBetweenSignAndMagnitudeNumbers(const Bits &sam1,
+                                                     const Bits &sam2) {
+    const Bits biased1 = SignAndMagnitudeToBiased(sam1);
+    const Bits biased2 = SignAndMagnitudeToBiased(sam2);
+    return (biased1 >= biased2) ? (biased1 - biased2) : (biased2 - biased1);
+  }
+
+  FloatingPointUnion u_;
+};
+
+// We cannot use std::numeric_limits<T>::max() as it clashes with the max()
+// macro defined by <windows.h>.
+template <>
+inline float FloatingPoint<float>::Max() { return FLT_MAX; }
+template <>
+inline double FloatingPoint<double>::Max() { return DBL_MAX; }
+
+// Typedefs the instances of the FloatingPoint template class that we
+// care to use.
+typedef FloatingPoint<float> Float;
+typedef FloatingPoint<double> Double;
+
+// In order to catch the mistake of putting tests that use different
+// test fixture classes in the same test suite, we need to assign
+// unique IDs to fixture classes and compare them.  The TypeId type is
+// used to hold such IDs.  The user should treat TypeId as an opaque
+// type: the only operation allowed on TypeId values is to compare
+// them for equality using the == operator.
+typedef const void* TypeId;
+
+template <typename T>
+class TypeIdHelper {
+ public:
+  // dummy_ must not have a const type.  Otherwise an overly eager
+  // compiler (e.g. MSVC 7.1 & 8.0) may try to merge
+  // TypeIdHelper<T>::dummy_ for different Ts as an "optimization".
+  static bool dummy_;
+};
+
+template <typename T>
+bool TypeIdHelper<T>::dummy_ = false;
+
+// GetTypeId<T>() returns the ID of type T.  Different values will be
+// returned for different types.  Calling the function twice with the
+// same type argument is guaranteed to return the same ID.
+template <typename T>
+TypeId GetTypeId() {
+  // The compiler is required to allocate a different
+  // TypeIdHelper<T>::dummy_ variable for each T used to instantiate
+  // the template.  Therefore, the address of dummy_ is guaranteed to
+  // be unique.
+  return &(TypeIdHelper<T>::dummy_);
+}
+
+// Returns the type ID of ::testing::Test.  Always call this instead
+// of GetTypeId< ::testing::Test>() to get the type ID of
+// ::testing::Test, as the latter may give the wrong result due to a
+// suspected linker bug when compiling Google Test as a Mac OS X
+// framework.
+GTEST_API_ TypeId GetTestTypeId();
+
+// Defines the abstract factory interface that creates instances
+// of a Test object.
+class TestFactoryBase {
+ public:
+  virtual ~TestFactoryBase() {}
+
+  // Creates a test instance to run. The instance is both created and destroyed
+  // within TestInfoImpl::Run()
+  virtual Test* CreateTest() = 0;
+
+ protected:
+  TestFactoryBase() {}
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestFactoryBase);
+};
+
+// This class provides implementation of TeastFactoryBase interface.
+// It is used in TEST and TEST_F macros.
+template <class TestClass>
+class TestFactoryImpl : public TestFactoryBase {
+ public:
+  Test* CreateTest() override { return new TestClass; }
+};
+
+#if GTEST_OS_WINDOWS
+
+// Predicate-formatters for implementing the HRESULT checking macros
+// {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}
+// We pass a long instead of HRESULT to avoid causing an
+// include dependency for the HRESULT type.
+GTEST_API_ AssertionResult IsHRESULTSuccess(const char* expr,
+                                            long hr);  // NOLINT
+GTEST_API_ AssertionResult IsHRESULTFailure(const char* expr,
+                                            long hr);  // NOLINT
+
+#endif  // GTEST_OS_WINDOWS
+
+// Types of SetUpTestSuite() and TearDownTestSuite() functions.
+using SetUpTestSuiteFunc = void (*)();
+using TearDownTestSuiteFunc = void (*)();
+
+struct CodeLocation {
+  CodeLocation(const std::string& a_file, int a_line)
+      : file(a_file), line(a_line) {}
+
+  std::string file;
+  int line;
+};
+
+//  Helper to identify which setup function for TestCase / TestSuite to call.
+//  Only one function is allowed, either TestCase or TestSute but not both.
+
+// Utility functions to help SuiteApiResolver
+using SetUpTearDownSuiteFuncType = void (*)();
+
+inline SetUpTearDownSuiteFuncType GetNotDefaultOrNull(
+    SetUpTearDownSuiteFuncType a, SetUpTearDownSuiteFuncType def) {
+  return a == def ? nullptr : a;
+}
+
+template <typename T>
+//  Note that SuiteApiResolver inherits from T because
+//  SetUpTestSuite()/TearDownTestSuite() could be protected. Ths way
+//  SuiteApiResolver can access them.
+struct SuiteApiResolver : T {
+  // testing::Test is only forward declared at this point. So we make it a
+  // dependend class for the compiler to be OK with it.
+  using Test =
+      typename std::conditional<sizeof(T) != 0, ::testing::Test, void>::type;
+
+  static SetUpTearDownSuiteFuncType GetSetUpCaseOrSuite(const char* filename,
+                                                        int line_num) {
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+    SetUpTearDownSuiteFuncType test_case_fp =
+        GetNotDefaultOrNull(&T::SetUpTestCase, &Test::SetUpTestCase);
+    SetUpTearDownSuiteFuncType test_suite_fp =
+        GetNotDefaultOrNull(&T::SetUpTestSuite, &Test::SetUpTestSuite);
+
+    GTEST_CHECK_(!test_case_fp || !test_suite_fp)
+        << "Test can not provide both SetUpTestSuite and SetUpTestCase, please "
+           "make sure there is only one present at "
+        << filename << ":" << line_num;
+
+    return test_case_fp != nullptr ? test_case_fp : test_suite_fp;
+#else
+    (void)(filename);
+    (void)(line_num);
+    return &T::SetUpTestSuite;
+#endif
+  }
+
+  static SetUpTearDownSuiteFuncType GetTearDownCaseOrSuite(const char* filename,
+                                                           int line_num) {
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+    SetUpTearDownSuiteFuncType test_case_fp =
+        GetNotDefaultOrNull(&T::TearDownTestCase, &Test::TearDownTestCase);
+    SetUpTearDownSuiteFuncType test_suite_fp =
+        GetNotDefaultOrNull(&T::TearDownTestSuite, &Test::TearDownTestSuite);
+
+    GTEST_CHECK_(!test_case_fp || !test_suite_fp)
+        << "Test can not provide both TearDownTestSuite and TearDownTestCase,"
+           " please make sure there is only one present at"
+        << filename << ":" << line_num;
+
+    return test_case_fp != nullptr ? test_case_fp : test_suite_fp;
+#else
+    (void)(filename);
+    (void)(line_num);
+    return &T::TearDownTestSuite;
+#endif
+  }
+};
+
+// Creates a new TestInfo object and registers it with Google Test;
+// returns the created object.
+//
+// Arguments:
+//
+//   test_suite_name:  name of the test suite
+//   name:             name of the test
+//   type_param:       the name of the test's type parameter, or NULL if
+//                     this is not a typed or a type-parameterized test.
+//   value_param:      text representation of the test's value parameter,
+//                     or NULL if this is not a type-parameterized test.
+//   code_location:    code location where the test is defined
+//   fixture_class_id: ID of the test fixture class
+//   set_up_tc:        pointer to the function that sets up the test suite
+//   tear_down_tc:     pointer to the function that tears down the test suite
+//   factory:          pointer to the factory that creates a test object.
+//                     The newly created TestInfo instance will assume
+//                     ownership of the factory object.
+GTEST_API_ TestInfo* MakeAndRegisterTestInfo(
+    const char* test_suite_name, const char* name, const char* type_param,
+    const char* value_param, CodeLocation code_location,
+    TypeId fixture_class_id, SetUpTestSuiteFunc set_up_tc,
+    TearDownTestSuiteFunc tear_down_tc, TestFactoryBase* factory);
+
+// If *pstr starts with the given prefix, modifies *pstr to be right
+// past the prefix and returns true; otherwise leaves *pstr unchanged
+// and returns false.  None of pstr, *pstr, and prefix can be NULL.
+GTEST_API_ bool SkipPrefix(const char* prefix, const char** pstr);
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
+/* class A needs to have dll-interface to be used by clients of class B */)
+
+// State of the definition of a type-parameterized test suite.
+class GTEST_API_ TypedTestSuitePState {
+ public:
+  TypedTestSuitePState() : registered_(false) {}
+
+  // Adds the given test name to defined_test_names_ and return true
+  // if the test suite hasn't been registered; otherwise aborts the
+  // program.
+  bool AddTestName(const char* file, int line, const char* case_name,
+                   const char* test_name) {
+    if (registered_) {
+      fprintf(stderr,
+              "%s Test %s must be defined before "
+              "REGISTER_TYPED_TEST_SUITE_P(%s, ...).\n",
+              FormatFileLocation(file, line).c_str(), test_name, case_name);
+      fflush(stderr);
+      posix::Abort();
+    }
+    registered_tests_.insert(
+        ::std::make_pair(test_name, CodeLocation(file, line)));
+    return true;
+  }
+
+  bool TestExists(const std::string& test_name) const {
+    return registered_tests_.count(test_name) > 0;
+  }
+
+  const CodeLocation& GetCodeLocation(const std::string& test_name) const {
+    RegisteredTestsMap::const_iterator it = registered_tests_.find(test_name);
+    GTEST_CHECK_(it != registered_tests_.end());
+    return it->second;
+  }
+
+  // Verifies that registered_tests match the test names in
+  // defined_test_names_; returns registered_tests if successful, or
+  // aborts the program otherwise.
+  const char* VerifyRegisteredTestNames(const char* test_suite_name,
+                                        const char* file, int line,
+                                        const char* registered_tests);
+
+ private:
+  typedef ::std::map<std::string, CodeLocation> RegisteredTestsMap;
+
+  bool registered_;
+  RegisteredTestsMap registered_tests_;
+};
+
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+using TypedTestCasePState = TypedTestSuitePState;
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
+
+// Skips to the first non-space char after the first comma in 'str';
+// returns NULL if no comma is found in 'str'.
+inline const char* SkipComma(const char* str) {
+  const char* comma = strchr(str, ',');
+  if (comma == nullptr) {
+    return nullptr;
+  }
+  while (IsSpace(*(++comma))) {}
+  return comma;
+}
+
+// Returns the prefix of 'str' before the first comma in it; returns
+// the entire string if it contains no comma.
+inline std::string GetPrefixUntilComma(const char* str) {
+  const char* comma = strchr(str, ',');
+  return comma == nullptr ? str : std::string(str, comma);
+}
+
+// Splits a given string on a given delimiter, populating a given
+// vector with the fields.
+void SplitString(const ::std::string& str, char delimiter,
+                 ::std::vector< ::std::string>* dest);
+
+// The default argument to the template below for the case when the user does
+// not provide a name generator.
+struct DefaultNameGenerator {
+  template <typename T>
+  static std::string GetName(int i) {
+    return StreamableToString(i);
+  }
+};
+
+template <typename Provided = DefaultNameGenerator>
+struct NameGeneratorSelector {
+  typedef Provided type;
+};
+
+template <typename NameGenerator>
+void GenerateNamesRecursively(internal::None, std::vector<std::string>*, int) {}
+
+template <typename NameGenerator, typename Types>
+void GenerateNamesRecursively(Types, std::vector<std::string>* result, int i) {
+  result->push_back(NameGenerator::template GetName<typename Types::Head>(i));
+  GenerateNamesRecursively<NameGenerator>(typename Types::Tail(), result,
+                                          i + 1);
+}
+
+template <typename NameGenerator, typename Types>
+std::vector<std::string> GenerateNames() {
+  std::vector<std::string> result;
+  GenerateNamesRecursively<NameGenerator>(Types(), &result, 0);
+  return result;
+}
+
+// TypeParameterizedTest<Fixture, TestSel, Types>::Register()
+// registers a list of type-parameterized tests with Google Test.  The
+// return value is insignificant - we just need to return something
+// such that we can call this function in a namespace scope.
+//
+// Implementation note: The GTEST_TEMPLATE_ macro declares a template
+// template parameter.  It's defined in gtest-type-util.h.
+template <GTEST_TEMPLATE_ Fixture, class TestSel, typename Types>
+class TypeParameterizedTest {
+ public:
+  // 'index' is the index of the test in the type list 'Types'
+  // specified in INSTANTIATE_TYPED_TEST_SUITE_P(Prefix, TestSuite,
+  // Types).  Valid values for 'index' are [0, N - 1] where N is the
+  // length of Types.
+  static bool Register(const char* prefix, const CodeLocation& code_location,
+                       const char* case_name, const char* test_names, int index,
+                       const std::vector<std::string>& type_names =
+                           GenerateNames<DefaultNameGenerator, Types>()) {
+    typedef typename Types::Head Type;
+    typedef Fixture<Type> FixtureClass;
+    typedef typename GTEST_BIND_(TestSel, Type) TestClass;
+
+    // First, registers the first type-parameterized test in the type
+    // list.
+    MakeAndRegisterTestInfo(
+        (std::string(prefix) + (prefix[0] == '\0' ? "" : "/") + case_name +
+         "/" + type_names[static_cast<size_t>(index)])
+            .c_str(),
+        StripTrailingSpaces(GetPrefixUntilComma(test_names)).c_str(),
+        GetTypeName<Type>().c_str(),
+        nullptr,  // No value parameter.
+        code_location, GetTypeId<FixtureClass>(),
+        SuiteApiResolver<TestClass>::GetSetUpCaseOrSuite(
+            code_location.file.c_str(), code_location.line),
+        SuiteApiResolver<TestClass>::GetTearDownCaseOrSuite(
+            code_location.file.c_str(), code_location.line),
+        new TestFactoryImpl<TestClass>);
+
+    // Next, recurses (at compile time) with the tail of the type list.
+    return TypeParameterizedTest<Fixture, TestSel,
+                                 typename Types::Tail>::Register(prefix,
+                                                                 code_location,
+                                                                 case_name,
+                                                                 test_names,
+                                                                 index + 1,
+                                                                 type_names);
+  }
+};
+
+// The base case for the compile time recursion.
+template <GTEST_TEMPLATE_ Fixture, class TestSel>
+class TypeParameterizedTest<Fixture, TestSel, internal::None> {
+ public:
+  static bool Register(const char* /*prefix*/, const CodeLocation&,
+                       const char* /*case_name*/, const char* /*test_names*/,
+                       int /*index*/,
+                       const std::vector<std::string>& =
+                           std::vector<std::string>() /*type_names*/) {
+    return true;
+  }
+};
+
+GTEST_API_ void RegisterTypeParameterizedTestSuite(const char* test_suite_name,
+                                                   CodeLocation code_location);
+GTEST_API_ void RegisterTypeParameterizedTestSuiteInstantiation(
+    const char* case_name);
+
+// TypeParameterizedTestSuite<Fixture, Tests, Types>::Register()
+// registers *all combinations* of 'Tests' and 'Types' with Google
+// Test.  The return value is insignificant - we just need to return
+// something such that we can call this function in a namespace scope.
+template <GTEST_TEMPLATE_ Fixture, typename Tests, typename Types>
+class TypeParameterizedTestSuite {
+ public:
+  static bool Register(const char* prefix, CodeLocation code_location,
+                       const TypedTestSuitePState* state, const char* case_name,
+                       const char* test_names,
+                       const std::vector<std::string>& type_names =
+                           GenerateNames<DefaultNameGenerator, Types>()) {
+    RegisterTypeParameterizedTestSuiteInstantiation(case_name);
+    std::string test_name = StripTrailingSpaces(
+        GetPrefixUntilComma(test_names));
+    if (!state->TestExists(test_name)) {
+      fprintf(stderr, "Failed to get code location for test %s.%s at %s.",
+              case_name, test_name.c_str(),
+              FormatFileLocation(code_location.file.c_str(),
+                                 code_location.line).c_str());
+      fflush(stderr);
+      posix::Abort();
+    }
+    const CodeLocation& test_location = state->GetCodeLocation(test_name);
+
+    typedef typename Tests::Head Head;
+
+    // First, register the first test in 'Test' for each type in 'Types'.
+    TypeParameterizedTest<Fixture, Head, Types>::Register(
+        prefix, test_location, case_name, test_names, 0, type_names);
+
+    // Next, recurses (at compile time) with the tail of the test list.
+    return TypeParameterizedTestSuite<Fixture, typename Tests::Tail,
+                                      Types>::Register(prefix, code_location,
+                                                       state, case_name,
+                                                       SkipComma(test_names),
+                                                       type_names);
+  }
+};
+
+// The base case for the compile time recursion.
+template <GTEST_TEMPLATE_ Fixture, typename Types>
+class TypeParameterizedTestSuite<Fixture, internal::None, Types> {
+ public:
+  static bool Register(const char* /*prefix*/, const CodeLocation&,
+                       const TypedTestSuitePState* /*state*/,
+                       const char* /*case_name*/, const char* /*test_names*/,
+                       const std::vector<std::string>& =
+                           std::vector<std::string>() /*type_names*/) {
+    return true;
+  }
+};
+
+// Returns the current OS stack trace as an std::string.
+//
+// The maximum number of stack frames to be included is specified by
+// the gtest_stack_trace_depth flag.  The skip_count parameter
+// specifies the number of top frames to be skipped, which doesn't
+// count against the number of frames to be included.
+//
+// For example, if Foo() calls Bar(), which in turn calls
+// GetCurrentOsStackTraceExceptTop(..., 1), Foo() will be included in
+// the trace but Bar() and GetCurrentOsStackTraceExceptTop() won't.
+GTEST_API_ std::string GetCurrentOsStackTraceExceptTop(
+    UnitTest* unit_test, int skip_count);
+
+// Helpers for suppressing warnings on unreachable code or constant
+// condition.
+
+// Always returns true.
+GTEST_API_ bool AlwaysTrue();
+
+// Always returns false.
+inline bool AlwaysFalse() { return !AlwaysTrue(); }
+
+// Helper for suppressing false warning from Clang on a const char*
+// variable declared in a conditional expression always being NULL in
+// the else branch.
+struct GTEST_API_ ConstCharPtr {
+  ConstCharPtr(const char* str) : value(str) {}
+  operator bool() const { return true; }
+  const char* value;
+};
+
+// Helper for declaring std::string within 'if' statement
+// in pre C++17 build environment.
+struct TrueWithString {
+  TrueWithString() = default;
+  explicit TrueWithString(const char* str) : value(str) {}
+  explicit TrueWithString(const std::string& str) : value(str) {}
+  explicit operator bool() const { return true; }
+  std::string value;
+};
+
+// A simple Linear Congruential Generator for generating random
+// numbers with a uniform distribution.  Unlike rand() and srand(), it
+// doesn't use global state (and therefore can't interfere with user
+// code).  Unlike rand_r(), it's portable.  An LCG isn't very random,
+// but it's good enough for our purposes.
+class GTEST_API_ Random {
+ public:
+  static const uint32_t kMaxRange = 1u << 31;
+
+  explicit Random(uint32_t seed) : state_(seed) {}
+
+  void Reseed(uint32_t seed) { state_ = seed; }
+
+  // Generates a random number from [0, range).  Crashes if 'range' is
+  // 0 or greater than kMaxRange.
+  uint32_t Generate(uint32_t range);
+
+ private:
+  uint32_t state_;
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(Random);
+};
+
+// Turns const U&, U&, const U, and U all into U.
+#define GTEST_REMOVE_REFERENCE_AND_CONST_(T) \
+  typename std::remove_const<typename std::remove_reference<T>::type>::type
+
+// HasDebugStringAndShortDebugString<T>::value is a compile-time bool constant
+// that's true if and only if T has methods DebugString() and ShortDebugString()
+// that return std::string.
+template <typename T>
+class HasDebugStringAndShortDebugString {
+ private:
+  template <typename C>
+  static auto CheckDebugString(C*) -> typename std::is_same<
+      std::string, decltype(std::declval<const C>().DebugString())>::type;
+  template <typename>
+  static std::false_type CheckDebugString(...);
+
+  template <typename C>
+  static auto CheckShortDebugString(C*) -> typename std::is_same<
+      std::string, decltype(std::declval<const C>().ShortDebugString())>::type;
+  template <typename>
+  static std::false_type CheckShortDebugString(...);
+
+  using HasDebugStringType = decltype(CheckDebugString<T>(nullptr));
+  using HasShortDebugStringType = decltype(CheckShortDebugString<T>(nullptr));
+
+ public:
+  static constexpr bool value =
+      HasDebugStringType::value && HasShortDebugStringType::value;
+};
+
+template <typename T>
+constexpr bool HasDebugStringAndShortDebugString<T>::value;
+
+// When the compiler sees expression IsContainerTest<C>(0), if C is an
+// STL-style container class, the first overload of IsContainerTest
+// will be viable (since both C::iterator* and C::const_iterator* are
+// valid types and NULL can be implicitly converted to them).  It will
+// be picked over the second overload as 'int' is a perfect match for
+// the type of argument 0.  If C::iterator or C::const_iterator is not
+// a valid type, the first overload is not viable, and the second
+// overload will be picked.  Therefore, we can determine whether C is
+// a container class by checking the type of IsContainerTest<C>(0).
+// The value of the expression is insignificant.
+//
+// In C++11 mode we check the existence of a const_iterator and that an
+// iterator is properly implemented for the container.
+//
+// For pre-C++11 that we look for both C::iterator and C::const_iterator.
+// The reason is that C++ injects the name of a class as a member of the
+// class itself (e.g. you can refer to class iterator as either
+// 'iterator' or 'iterator::iterator').  If we look for C::iterator
+// only, for example, we would mistakenly think that a class named
+// iterator is an STL container.
+//
+// Also note that the simpler approach of overloading
+// IsContainerTest(typename C::const_iterator*) and
+// IsContainerTest(...) doesn't work with Visual Age C++ and Sun C++.
+typedef int IsContainer;
+template <class C,
+          class Iterator = decltype(::std::declval<const C&>().begin()),
+          class = decltype(::std::declval<const C&>().end()),
+          class = decltype(++::std::declval<Iterator&>()),
+          class = decltype(*::std::declval<Iterator>()),
+          class = typename C::const_iterator>
+IsContainer IsContainerTest(int /* dummy */) {
+  return 0;
+}
+
+typedef char IsNotContainer;
+template <class C>
+IsNotContainer IsContainerTest(long /* dummy */) { return '\0'; }
+
+// Trait to detect whether a type T is a hash table.
+// The heuristic used is that the type contains an inner type `hasher` and does
+// not contain an inner type `reverse_iterator`.
+// If the container is iterable in reverse, then order might actually matter.
+template <typename T>
+struct IsHashTable {
+ private:
+  template <typename U>
+  static char test(typename U::hasher*, typename U::reverse_iterator*);
+  template <typename U>
+  static int test(typename U::hasher*, ...);
+  template <typename U>
+  static char test(...);
+
+ public:
+  static const bool value = sizeof(test<T>(nullptr, nullptr)) == sizeof(int);
+};
+
+template <typename T>
+const bool IsHashTable<T>::value;
+
+template <typename C,
+          bool = sizeof(IsContainerTest<C>(0)) == sizeof(IsContainer)>
+struct IsRecursiveContainerImpl;
+
+template <typename C>
+struct IsRecursiveContainerImpl<C, false> : public std::false_type {};
+
+// Since the IsRecursiveContainerImpl depends on the IsContainerTest we need to
+// obey the same inconsistencies as the IsContainerTest, namely check if
+// something is a container is relying on only const_iterator in C++11 and
+// is relying on both const_iterator and iterator otherwise
+template <typename C>
+struct IsRecursiveContainerImpl<C, true> {
+  using value_type = decltype(*std::declval<typename C::const_iterator>());
+  using type =
+      std::is_same<typename std::remove_const<
+                       typename std::remove_reference<value_type>::type>::type,
+                   C>;
+};
+
+// IsRecursiveContainer<Type> is a unary compile-time predicate that
+// evaluates whether C is a recursive container type. A recursive container
+// type is a container type whose value_type is equal to the container type
+// itself. An example for a recursive container type is
+// boost::filesystem::path, whose iterator has a value_type that is equal to
+// boost::filesystem::path.
+template <typename C>
+struct IsRecursiveContainer : public IsRecursiveContainerImpl<C>::type {};
+
+// Utilities for native arrays.
+
+// ArrayEq() compares two k-dimensional native arrays using the
+// elements' operator==, where k can be any integer >= 0.  When k is
+// 0, ArrayEq() degenerates into comparing a single pair of values.
+
+template <typename T, typename U>
+bool ArrayEq(const T* lhs, size_t size, const U* rhs);
+
+// This generic version is used when k is 0.
+template <typename T, typename U>
+inline bool ArrayEq(const T& lhs, const U& rhs) { return lhs == rhs; }
+
+// This overload is used when k >= 1.
+template <typename T, typename U, size_t N>
+inline bool ArrayEq(const T(&lhs)[N], const U(&rhs)[N]) {
+  return internal::ArrayEq(lhs, N, rhs);
+}
+
+// This helper reduces code bloat.  If we instead put its logic inside
+// the previous ArrayEq() function, arrays with different sizes would
+// lead to different copies of the template code.
+template <typename T, typename U>
+bool ArrayEq(const T* lhs, size_t size, const U* rhs) {
+  for (size_t i = 0; i != size; i++) {
+    if (!internal::ArrayEq(lhs[i], rhs[i]))
+      return false;
+  }
+  return true;
+}
+
+// Finds the first element in the iterator range [begin, end) that
+// equals elem.  Element may be a native array type itself.
+template <typename Iter, typename Element>
+Iter ArrayAwareFind(Iter begin, Iter end, const Element& elem) {
+  for (Iter it = begin; it != end; ++it) {
+    if (internal::ArrayEq(*it, elem))
+      return it;
+  }
+  return end;
+}
+
+// CopyArray() copies a k-dimensional native array using the elements'
+// operator=, where k can be any integer >= 0.  When k is 0,
+// CopyArray() degenerates into copying a single value.
+
+template <typename T, typename U>
+void CopyArray(const T* from, size_t size, U* to);
+
+// This generic version is used when k is 0.
+template <typename T, typename U>
+inline void CopyArray(const T& from, U* to) { *to = from; }
+
+// This overload is used when k >= 1.
+template <typename T, typename U, size_t N>
+inline void CopyArray(const T(&from)[N], U(*to)[N]) {
+  internal::CopyArray(from, N, *to);
+}
+
+// This helper reduces code bloat.  If we instead put its logic inside
+// the previous CopyArray() function, arrays with different sizes
+// would lead to different copies of the template code.
+template <typename T, typename U>
+void CopyArray(const T* from, size_t size, U* to) {
+  for (size_t i = 0; i != size; i++) {
+    internal::CopyArray(from[i], to + i);
+  }
+}
+
+// The relation between an NativeArray object (see below) and the
+// native array it represents.
+// We use 2 different structs to allow non-copyable types to be used, as long
+// as RelationToSourceReference() is passed.
+struct RelationToSourceReference {};
+struct RelationToSourceCopy {};
+
+// Adapts a native array to a read-only STL-style container.  Instead
+// of the complete STL container concept, this adaptor only implements
+// members useful for Google Mock's container matchers.  New members
+// should be added as needed.  To simplify the implementation, we only
+// support Element being a raw type (i.e. having no top-level const or
+// reference modifier).  It's the client's responsibility to satisfy
+// this requirement.  Element can be an array type itself (hence
+// multi-dimensional arrays are supported).
+template <typename Element>
+class NativeArray {
+ public:
+  // STL-style container typedefs.
+  typedef Element value_type;
+  typedef Element* iterator;
+  typedef const Element* const_iterator;
+
+  // Constructs from a native array. References the source.
+  NativeArray(const Element* array, size_t count, RelationToSourceReference) {
+    InitRef(array, count);
+  }
+
+  // Constructs from a native array. Copies the source.
+  NativeArray(const Element* array, size_t count, RelationToSourceCopy) {
+    InitCopy(array, count);
+  }
+
+  // Copy constructor.
+  NativeArray(const NativeArray& rhs) {
+    (this->*rhs.clone_)(rhs.array_, rhs.size_);
+  }
+
+  ~NativeArray() {
+    if (clone_ != &NativeArray::InitRef)
+      delete[] array_;
+  }
+
+  // STL-style container methods.
+  size_t size() const { return size_; }
+  const_iterator begin() const { return array_; }
+  const_iterator end() const { return array_ + size_; }
+  bool operator==(const NativeArray& rhs) const {
+    return size() == rhs.size() &&
+        ArrayEq(begin(), size(), rhs.begin());
+  }
+
+ private:
+  static_assert(!std::is_const<Element>::value, "Type must not be const");
+  static_assert(!std::is_reference<Element>::value,
+                "Type must not be a reference");
+
+  // Initializes this object with a copy of the input.
+  void InitCopy(const Element* array, size_t a_size) {
+    Element* const copy = new Element[a_size];
+    CopyArray(array, a_size, copy);
+    array_ = copy;
+    size_ = a_size;
+    clone_ = &NativeArray::InitCopy;
+  }
+
+  // Initializes this object with a reference of the input.
+  void InitRef(const Element* array, size_t a_size) {
+    array_ = array;
+    size_ = a_size;
+    clone_ = &NativeArray::InitRef;
+  }
+
+  const Element* array_;
+  size_t size_;
+  void (NativeArray::*clone_)(const Element*, size_t);
+};
+
+// Backport of std::index_sequence.
+template <size_t... Is>
+struct IndexSequence {
+  using type = IndexSequence;
+};
+
+// Double the IndexSequence, and one if plus_one is true.
+template <bool plus_one, typename T, size_t sizeofT>
+struct DoubleSequence;
+template <size_t... I, size_t sizeofT>
+struct DoubleSequence<true, IndexSequence<I...>, sizeofT> {
+  using type = IndexSequence<I..., (sizeofT + I)..., 2 * sizeofT>;
+};
+template <size_t... I, size_t sizeofT>
+struct DoubleSequence<false, IndexSequence<I...>, sizeofT> {
+  using type = IndexSequence<I..., (sizeofT + I)...>;
+};
+
+// Backport of std::make_index_sequence.
+// It uses O(ln(N)) instantiation depth.
+template <size_t N>
+struct MakeIndexSequenceImpl
+    : DoubleSequence<N % 2 == 1, typename MakeIndexSequenceImpl<N / 2>::type,
+                     N / 2>::type {};
+
+template <>
+struct MakeIndexSequenceImpl<0> : IndexSequence<> {};
+
+template <size_t N>
+using MakeIndexSequence = typename MakeIndexSequenceImpl<N>::type;
+
+template <typename... T>
+using IndexSequenceFor = typename MakeIndexSequence<sizeof...(T)>::type;
+
+template <size_t>
+struct Ignore {
+  Ignore(...);  // NOLINT
+};
+
+template <typename>
+struct ElemFromListImpl;
+template <size_t... I>
+struct ElemFromListImpl<IndexSequence<I...>> {
+  // We make Ignore a template to solve a problem with MSVC.
+  // A non-template Ignore would work fine with `decltype(Ignore(I))...`, but
+  // MSVC doesn't understand how to deal with that pack expansion.
+  // Use `0 * I` to have a single instantiation of Ignore.
+  template <typename R>
+  static R Apply(Ignore<0 * I>..., R (*)(), ...);
+};
+
+template <size_t N, typename... T>
+struct ElemFromList {
+  using type =
+      decltype(ElemFromListImpl<typename MakeIndexSequence<N>::type>::Apply(
+          static_cast<T (*)()>(nullptr)...));
+};
+
+struct FlatTupleConstructTag {};
+
+template <typename... T>
+class FlatTuple;
+
+template <typename Derived, size_t I>
+struct FlatTupleElemBase;
+
+template <typename... T, size_t I>
+struct FlatTupleElemBase<FlatTuple<T...>, I> {
+  using value_type = typename ElemFromList<I, T...>::type;
+  FlatTupleElemBase() = default;
+  template <typename Arg>
+  explicit FlatTupleElemBase(FlatTupleConstructTag, Arg&& t)
+      : value(std::forward<Arg>(t)) {}
+  value_type value;
+};
+
+template <typename Derived, typename Idx>
+struct FlatTupleBase;
+
+template <size_t... Idx, typename... T>
+struct FlatTupleBase<FlatTuple<T...>, IndexSequence<Idx...>>
+    : FlatTupleElemBase<FlatTuple<T...>, Idx>... {
+  using Indices = IndexSequence<Idx...>;
+  FlatTupleBase() = default;
+  template <typename... Args>
+  explicit FlatTupleBase(FlatTupleConstructTag, Args&&... args)
+      : FlatTupleElemBase<FlatTuple<T...>, Idx>(FlatTupleConstructTag{},
+                                                std::forward<Args>(args))... {}
+
+  template <size_t I>
+  const typename ElemFromList<I, T...>::type& Get() const {
+    return FlatTupleElemBase<FlatTuple<T...>, I>::value;
+  }
+
+  template <size_t I>
+  typename ElemFromList<I, T...>::type& Get() {
+    return FlatTupleElemBase<FlatTuple<T...>, I>::value;
+  }
+
+  template <typename F>
+  auto Apply(F&& f) -> decltype(std::forward<F>(f)(this->Get<Idx>()...)) {
+    return std::forward<F>(f)(Get<Idx>()...);
+  }
+
+  template <typename F>
+  auto Apply(F&& f) const -> decltype(std::forward<F>(f)(this->Get<Idx>()...)) {
+    return std::forward<F>(f)(Get<Idx>()...);
+  }
+};
+
+// Analog to std::tuple but with different tradeoffs.
+// This class minimizes the template instantiation depth, thus allowing more
+// elements than std::tuple would. std::tuple has been seen to require an
+// instantiation depth of more than 10x the number of elements in some
+// implementations.
+// FlatTuple and ElemFromList are not recursive and have a fixed depth
+// regardless of T...
+// MakeIndexSequence, on the other hand, it is recursive but with an
+// instantiation depth of O(ln(N)).
+template <typename... T>
+class FlatTuple
+    : private FlatTupleBase<FlatTuple<T...>,
+                            typename MakeIndexSequence<sizeof...(T)>::type> {
+  using Indices = typename FlatTupleBase<
+      FlatTuple<T...>, typename MakeIndexSequence<sizeof...(T)>::type>::Indices;
+
+ public:
+  FlatTuple() = default;
+  template <typename... Args>
+  explicit FlatTuple(FlatTupleConstructTag tag, Args&&... args)
+      : FlatTuple::FlatTupleBase(tag, std::forward<Args>(args)...) {}
+
+  using FlatTuple::FlatTupleBase::Apply;
+  using FlatTuple::FlatTupleBase::Get;
+};
+
+// Utility functions to be called with static_assert to induce deprecation
+// warnings.
+GTEST_INTERNAL_DEPRECATED(
+    "INSTANTIATE_TEST_CASE_P is deprecated, please use "
+    "INSTANTIATE_TEST_SUITE_P")
+constexpr bool InstantiateTestCase_P_IsDeprecated() { return true; }
+
+GTEST_INTERNAL_DEPRECATED(
+    "TYPED_TEST_CASE_P is deprecated, please use "
+    "TYPED_TEST_SUITE_P")
+constexpr bool TypedTestCase_P_IsDeprecated() { return true; }
+
+GTEST_INTERNAL_DEPRECATED(
+    "TYPED_TEST_CASE is deprecated, please use "
+    "TYPED_TEST_SUITE")
+constexpr bool TypedTestCaseIsDeprecated() { return true; }
+
+GTEST_INTERNAL_DEPRECATED(
+    "REGISTER_TYPED_TEST_CASE_P is deprecated, please use "
+    "REGISTER_TYPED_TEST_SUITE_P")
+constexpr bool RegisterTypedTestCase_P_IsDeprecated() { return true; }
+
+GTEST_INTERNAL_DEPRECATED(
+    "INSTANTIATE_TYPED_TEST_CASE_P is deprecated, please use "
+    "INSTANTIATE_TYPED_TEST_SUITE_P")
+constexpr bool InstantiateTypedTestCase_P_IsDeprecated() { return true; }
+
+}  // namespace internal
+}  // namespace testing
+
+namespace std {
+// Some standard library implementations use `struct tuple_size` and some use
+// `class tuple_size`. Clang warns about the mismatch.
+// https://reviews.llvm.org/D55466
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wmismatched-tags"
+#endif
+template <typename... Ts>
+struct tuple_size<testing::internal::FlatTuple<Ts...>>
+    : std::integral_constant<size_t, sizeof...(Ts)> {};
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+}  // namespace std
+
+#define GTEST_MESSAGE_AT_(file, line, message, result_type) \
+  ::testing::internal::AssertHelper(result_type, file, line, message) \
+    = ::testing::Message()
+
+#define GTEST_MESSAGE_(message, result_type) \
+  GTEST_MESSAGE_AT_(__FILE__, __LINE__, message, result_type)
+
+#define GTEST_FATAL_FAILURE_(message) \
+  return GTEST_MESSAGE_(message, ::testing::TestPartResult::kFatalFailure)
+
+#define GTEST_NONFATAL_FAILURE_(message) \
+  GTEST_MESSAGE_(message, ::testing::TestPartResult::kNonFatalFailure)
+
+#define GTEST_SUCCESS_(message) \
+  GTEST_MESSAGE_(message, ::testing::TestPartResult::kSuccess)
+
+#define GTEST_SKIP_(message) \
+  return GTEST_MESSAGE_(message, ::testing::TestPartResult::kSkip)
+
+// Suppress MSVC warning 4072 (unreachable code) for the code following
+// statement if it returns or throws (or doesn't return or throw in some
+// situations).
+// NOTE: The "else" is important to keep this expansion to prevent a top-level
+// "else" from attaching to our "if".
+#define GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement) \
+  if (::testing::internal::AlwaysTrue()) {                        \
+    statement;                                                    \
+  } else                     /* NOLINT */                         \
+    static_assert(true, "")  // User must have a semicolon after expansion.
+
+#if GTEST_HAS_EXCEPTIONS
+
+namespace testing {
+namespace internal {
+
+class NeverThrown {
+ public:
+  const char* what() const noexcept {
+    return "this exception should never be thrown";
+  }
+};
+
+}  // namespace internal
+}  // namespace testing
+
+#if GTEST_HAS_RTTI
+
+#define GTEST_EXCEPTION_TYPE_(e) ::testing::internal::GetTypeName(typeid(e))
+
+#else  // GTEST_HAS_RTTI
+
+#define GTEST_EXCEPTION_TYPE_(e) \
+  std::string { "an std::exception-derived error" }
+
+#endif  // GTEST_HAS_RTTI
+
+#define GTEST_TEST_THROW_CATCH_STD_EXCEPTION_(statement, expected_exception)   \
+  catch (typename std::conditional<                                            \
+         std::is_same<typename std::remove_cv<typename std::remove_reference<  \
+                          expected_exception>::type>::type,                    \
+                      std::exception>::value,                                  \
+         const ::testing::internal::NeverThrown&, const std::exception&>::type \
+             e) {                                                              \
+    gtest_msg.value = "Expected: " #statement                                  \
+                      " throws an exception of type " #expected_exception      \
+                      ".\n  Actual: it throws ";                               \
+    gtest_msg.value += GTEST_EXCEPTION_TYPE_(e);                               \
+    gtest_msg.value += " with description \"";                                 \
+    gtest_msg.value += e.what();                                               \
+    gtest_msg.value += "\".";                                                  \
+    goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);                \
+  }
+
+#else  // GTEST_HAS_EXCEPTIONS
+
+#define GTEST_TEST_THROW_CATCH_STD_EXCEPTION_(statement, expected_exception)
+
+#endif  // GTEST_HAS_EXCEPTIONS
+
+#define GTEST_TEST_THROW_(statement, expected_exception, fail)              \
+  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                             \
+  if (::testing::internal::TrueWithString gtest_msg{}) {                    \
+    bool gtest_caught_expected = false;                                     \
+    try {                                                                   \
+      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement);            \
+    } catch (expected_exception const&) {                                   \
+      gtest_caught_expected = true;                                         \
+    }                                                                       \
+    GTEST_TEST_THROW_CATCH_STD_EXCEPTION_(statement, expected_exception)    \
+    catch (...) {                                                           \
+      gtest_msg.value = "Expected: " #statement                             \
+                        " throws an exception of type " #expected_exception \
+                        ".\n  Actual: it throws a different type.";         \
+      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);           \
+    }                                                                       \
+    if (!gtest_caught_expected) {                                           \
+      gtest_msg.value = "Expected: " #statement                             \
+                        " throws an exception of type " #expected_exception \
+                        ".\n  Actual: it throws nothing.";                  \
+      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);           \
+    }                                                                       \
+  } else /*NOLINT*/                                                         \
+    GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__)                   \
+        : fail(gtest_msg.value.c_str())
+
+#if GTEST_HAS_EXCEPTIONS
+
+#define GTEST_TEST_NO_THROW_CATCH_STD_EXCEPTION_()                \
+  catch (std::exception const& e) {                               \
+    gtest_msg.value = "it throws ";                               \
+    gtest_msg.value += GTEST_EXCEPTION_TYPE_(e);                  \
+    gtest_msg.value += " with description \"";                    \
+    gtest_msg.value += e.what();                                  \
+    gtest_msg.value += "\".";                                     \
+    goto GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__); \
+  }
+
+#else  // GTEST_HAS_EXCEPTIONS
+
+#define GTEST_TEST_NO_THROW_CATCH_STD_EXCEPTION_()
+
+#endif  // GTEST_HAS_EXCEPTIONS
+
+#define GTEST_TEST_NO_THROW_(statement, fail) \
+  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
+  if (::testing::internal::TrueWithString gtest_msg{}) { \
+    try { \
+      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
+    } \
+    GTEST_TEST_NO_THROW_CATCH_STD_EXCEPTION_() \
+    catch (...) { \
+      gtest_msg.value = "it throws."; \
+      goto GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__); \
+    } \
+  } else \
+    GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__): \
+      fail(("Expected: " #statement " doesn't throw an exception.\n" \
+            "  Actual: " + gtest_msg.value).c_str())
+
+#define GTEST_TEST_ANY_THROW_(statement, fail) \
+  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
+  if (::testing::internal::AlwaysTrue()) { \
+    bool gtest_caught_any = false; \
+    try { \
+      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
+    } \
+    catch (...) { \
+      gtest_caught_any = true; \
+    } \
+    if (!gtest_caught_any) { \
+      goto GTEST_CONCAT_TOKEN_(gtest_label_testanythrow_, __LINE__); \
+    } \
+  } else \
+    GTEST_CONCAT_TOKEN_(gtest_label_testanythrow_, __LINE__): \
+      fail("Expected: " #statement " throws an exception.\n" \
+           "  Actual: it doesn't.")
+
+
+// Implements Boolean test assertions such as EXPECT_TRUE. expression can be
+// either a boolean expression or an AssertionResult. text is a textual
+// representation of expression as it was passed into the EXPECT_TRUE.
+#define GTEST_TEST_BOOLEAN_(expression, text, actual, expected, fail) \
+  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
+  if (const ::testing::AssertionResult gtest_ar_ = \
+      ::testing::AssertionResult(expression)) \
+    ; \
+  else \
+    fail(::testing::internal::GetBoolAssertionFailureMessage(\
+        gtest_ar_, text, #actual, #expected).c_str())
+
+#define GTEST_TEST_NO_FATAL_FAILURE_(statement, fail) \
+  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
+  if (::testing::internal::AlwaysTrue()) { \
+    ::testing::internal::HasNewFatalFailureHelper gtest_fatal_failure_checker; \
+    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
+    if (gtest_fatal_failure_checker.has_new_fatal_failure()) { \
+      goto GTEST_CONCAT_TOKEN_(gtest_label_testnofatal_, __LINE__); \
+    } \
+  } else \
+    GTEST_CONCAT_TOKEN_(gtest_label_testnofatal_, __LINE__): \
+      fail("Expected: " #statement " doesn't generate new fatal " \
+           "failures in the current thread.\n" \
+           "  Actual: it does.")
+
+// Expands to the name of the class that implements the given test.
+#define GTEST_TEST_CLASS_NAME_(test_suite_name, test_name) \
+  test_suite_name##_##test_name##_Test
+
+// Helper macro for defining tests.
+#define GTEST_TEST_(test_suite_name, test_name, parent_class, parent_id)      \
+  static_assert(sizeof(GTEST_STRINGIFY_(test_suite_name)) > 1,                \
+                "test_suite_name must not be empty");                         \
+  static_assert(sizeof(GTEST_STRINGIFY_(test_name)) > 1,                      \
+                "test_name must not be empty");                               \
+  class GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)                    \
+      : public parent_class {                                                 \
+   public:                                                                    \
+    GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() = default;           \
+    ~GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() override = default; \
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name,   \
+                                                           test_name));       \
+    GTEST_DISALLOW_MOVE_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name,   \
+                                                           test_name));       \
+                                                                              \
+   private:                                                                   \
+    void TestBody() override;                                                 \
+    static ::testing::TestInfo* const test_info_ GTEST_ATTRIBUTE_UNUSED_;     \
+  };                                                                          \
+                                                                              \
+  ::testing::TestInfo* const GTEST_TEST_CLASS_NAME_(test_suite_name,          \
+                                                    test_name)::test_info_ =  \
+      ::testing::internal::MakeAndRegisterTestInfo(                           \
+          #test_suite_name, #test_name, nullptr, nullptr,                     \
+          ::testing::internal::CodeLocation(__FILE__, __LINE__), (parent_id), \
+          ::testing::internal::SuiteApiResolver<                              \
+              parent_class>::GetSetUpCaseOrSuite(__FILE__, __LINE__),         \
+          ::testing::internal::SuiteApiResolver<                              \
+              parent_class>::GetTearDownCaseOrSuite(__FILE__, __LINE__),      \
+          new ::testing::internal::TestFactoryImpl<GTEST_TEST_CLASS_NAME_(    \
+              test_suite_name, test_name)>);                                  \
+  void GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::TestBody()
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
+// Copyright 2005, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//
+// The Google C++ Testing and Mocking Framework (Google Test)
+//
+// This header file defines the public API for death tests.  It is
+// #included by gtest.h so a user doesn't need to include this
+// directly.
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
+#define GOOGLETEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
+
+// Copyright 2005, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// The Google C++ Testing and Mocking Framework (Google Test)
+//
+// This header file defines internal utilities needed for implementing
+// death tests.  They are subject to change without notice.
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
+#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
+
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// The Google C++ Testing and Mocking Framework (Google Test)
+//
+// This file implements just enough of the matcher interface to allow
+// EXPECT_DEATH and friends to accept a matcher argument.
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
+#define GOOGLETEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
+
+#include <atomic>
+#include <memory>
+#include <ostream>
+#include <string>
+#include <type_traits>
+
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Google Test - The Google C++ Testing and Mocking Framework
+//
+// This file implements a universal value printer that can print a
+// value of any type T:
+//
+//   void ::testing::internal::UniversalPrinter<T>::Print(value, ostream_ptr);
+//
+// A user can teach this function how to print a class type T by
+// defining either operator<<() or PrintTo() in the namespace that
+// defines T.  More specifically, the FIRST defined function in the
+// following list will be used (assuming T is defined in namespace
+// foo):
+//
+//   1. foo::PrintTo(const T&, ostream*)
+//   2. operator<<(ostream&, const T&) defined in either foo or the
+//      global namespace.
+//
+// However if T is an STL-style container then it is printed element-wise
+// unless foo::PrintTo(const T&, ostream*) is defined. Note that
+// operator<<() is ignored for container types.
+//
+// If none of the above is defined, it will print the debug string of
+// the value if it is a protocol buffer, or print the raw bytes in the
+// value otherwise.
+//
+// To aid debugging: when T is a reference type, the address of the
+// value is also printed; when T is a (const) char pointer, both the
+// pointer value and the NUL-terminated string it points to are
+// printed.
+//
+// We also provide some convenient wrappers:
+//
+//   // Prints a value to a string.  For a (const or not) char
+//   // pointer, the NUL-terminated string (but not the pointer) is
+//   // printed.
+//   std::string ::testing::PrintToString(const T& value);
+//
+//   // Prints a value tersely: for a reference type, the referenced
+//   // value (but not the address) is printed; for a (const or not) char
+//   // pointer, the NUL-terminated string (but not the pointer) is
+//   // printed.
+//   void ::testing::internal::UniversalTersePrint(const T& value, ostream*);
+//
+//   // Prints value using the type inferred by the compiler.  The difference
+//   // from UniversalTersePrint() is that this function prints both the
+//   // pointer and the NUL-terminated string for a (const or not) char pointer.
+//   void ::testing::internal::UniversalPrint(const T& value, ostream*);
+//
+//   // Prints the fields of a tuple tersely to a string vector, one
+//   // element for each field. Tuple support must be enabled in
+//   // gtest-port.h.
+//   std::vector<string> UniversalTersePrintTupleFieldsToStrings(
+//       const Tuple& value);
+//
+// Known limitation:
+//
+// The print primitives print the elements of an STL-style container
+// using the compiler-inferred type of *iter where iter is a
+// const_iterator of the container.  When const_iterator is an input
+// iterator but not a forward iterator, this inferred type may not
+// match value_type, and the print output may be incorrect.  In
+// practice, this is rarely a problem as for most containers
+// const_iterator is a forward iterator.  We'll fix this if there's an
+// actual need for it.  Note that this fix cannot rely on value_type
+// being defined as many user-defined container types don't have
+// value_type.
+
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
+#define GOOGLETEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
+
+#include <functional>
+#include <memory>
+#include <ostream>  // NOLINT
+#include <sstream>
+#include <string>
+#include <tuple>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+
+#if GTEST_HAS_RTTI
+#include <typeindex>
+#include <typeinfo>
+#endif  // GTEST_HAS_RTTI
+
+namespace testing {
+
+// Definitions in the internal* namespaces are subject to change without notice.
+// DO NOT USE THEM IN USER CODE!
+namespace internal {
+
+template <typename T>
+void UniversalPrint(const T& value, ::std::ostream* os);
+
+// Used to print an STL-style container when the user doesn't define
+// a PrintTo() for it.
+struct ContainerPrinter {
+  template <typename T,
+            typename = typename std::enable_if<
+                (sizeof(IsContainerTest<T>(0)) == sizeof(IsContainer)) &&
+                !IsRecursiveContainer<T>::value>::type>
+  static void PrintValue(const T& container, std::ostream* os) {
+    const size_t kMaxCount = 32;  // The maximum number of elements to print.
+    *os << '{';
+    size_t count = 0;
+    for (auto&& elem : container) {
+      if (count > 0) {
+        *os << ',';
+        if (count == kMaxCount) {  // Enough has been printed.
+          *os << " ...";
+          break;
+        }
+      }
+      *os << ' ';
+      // We cannot call PrintTo(elem, os) here as PrintTo() doesn't
+      // handle `elem` being a native array.
+      internal::UniversalPrint(elem, os);
+      ++count;
+    }
+
+    if (count > 0) {
+      *os << ' ';
+    }
+    *os << '}';
+  }
+};
+
+// Used to print a pointer that is neither a char pointer nor a member
+// pointer, when the user doesn't define PrintTo() for it.  (A member
+// variable pointer or member function pointer doesn't really point to
+// a location in the address space.  Their representation is
+// implementation-defined.  Therefore they will be printed as raw
+// bytes.)
+struct FunctionPointerPrinter {
+  template <typename T, typename = typename std::enable_if<
+                            std::is_function<T>::value>::type>
+  static void PrintValue(T* p, ::std::ostream* os) {
+    if (p == nullptr) {
+      *os << "NULL";
+    } else {
+      // T is a function type, so '*os << p' doesn't do what we want
+      // (it just prints p as bool).  We want to print p as a const
+      // void*.
+      *os << reinterpret_cast<const void*>(p);
+    }
+  }
+};
+
+struct PointerPrinter {
+  template <typename T>
+  static void PrintValue(T* p, ::std::ostream* os) {
+    if (p == nullptr) {
+      *os << "NULL";
+    } else {
+      // T is not a function type.  We just call << to print p,
+      // relying on ADL to pick up user-defined << for their pointer
+      // types, if any.
+      *os << p;
+    }
+  }
+};
+
+namespace internal_stream_operator_without_lexical_name_lookup {
+
+// The presence of an operator<< here will terminate lexical scope lookup
+// straight away (even though it cannot be a match because of its argument
+// types). Thus, the two operator<< calls in StreamPrinter will find only ADL
+// candidates.
+struct LookupBlocker {};
+void operator<<(LookupBlocker, LookupBlocker);
+
+struct StreamPrinter {
+  template <typename T,
+            // Don't accept member pointers here. We'd print them via implicit
+            // conversion to bool, which isn't useful.
+            typename = typename std::enable_if<
+                !std::is_member_pointer<T>::value>::type,
+            // Only accept types for which we can find a streaming operator via
+            // ADL (possibly involving implicit conversions).
+            typename = decltype(std::declval<std::ostream&>()
+                                << std::declval<const T&>())>
+  static void PrintValue(const T& value, ::std::ostream* os) {
+    // Call streaming operator found by ADL, possibly with implicit conversions
+    // of the arguments.
+    *os << value;
+  }
+};
+
+}  // namespace internal_stream_operator_without_lexical_name_lookup
+
+struct ProtobufPrinter {
+  // We print a protobuf using its ShortDebugString() when the string
+  // doesn't exceed this many characters; otherwise we print it using
+  // DebugString() for better readability.
+  static const size_t kProtobufOneLinerMaxLength = 50;
+
+  template <typename T,
+            typename = typename std::enable_if<
+                internal::HasDebugStringAndShortDebugString<T>::value>::type>
+  static void PrintValue(const T& value, ::std::ostream* os) {
+    std::string pretty_str = value.ShortDebugString();
+    if (pretty_str.length() > kProtobufOneLinerMaxLength) {
+      pretty_str = "\n" + value.DebugString();
+    }
+    *os << ("<" + pretty_str + ">");
+  }
+};
+
+struct ConvertibleToIntegerPrinter {
+  // Since T has no << operator or PrintTo() but can be implicitly
+  // converted to BiggestInt, we print it as a BiggestInt.
+  //
+  // Most likely T is an enum type (either named or unnamed), in which
+  // case printing it as an integer is the desired behavior.  In case
+  // T is not an enum, printing it as an integer is the best we can do
+  // given that it has no user-defined printer.
+  static void PrintValue(internal::BiggestInt value, ::std::ostream* os) {
+    *os << value;
+  }
+};
+
+struct ConvertibleToStringViewPrinter {
+#if GTEST_INTERNAL_HAS_STRING_VIEW
+  static void PrintValue(internal::StringView value, ::std::ostream* os) {
+    internal::UniversalPrint(value, os);
+  }
+#endif
+};
+
+
+// Prints the given number of bytes in the given object to the given
+// ostream.
+GTEST_API_ void PrintBytesInObjectTo(const unsigned char* obj_bytes,
+                                     size_t count,
+                                     ::std::ostream* os);
+struct RawBytesPrinter {
+  // SFINAE on `sizeof` to make sure we have a complete type.
+  template <typename T, size_t = sizeof(T)>
+  static void PrintValue(const T& value, ::std::ostream* os) {
+    PrintBytesInObjectTo(
+        static_cast<const unsigned char*>(
+            // Load bearing cast to void* to support iOS
+            reinterpret_cast<const void*>(std::addressof(value))),
+        sizeof(value), os);
+  }
+};
+
+struct FallbackPrinter {
+  template <typename T>
+  static void PrintValue(const T&, ::std::ostream* os) {
+    *os << "(incomplete type)";
+  }
+};
+
+// Try every printer in order and return the first one that works.
+template <typename T, typename E, typename Printer, typename... Printers>
+struct FindFirstPrinter : FindFirstPrinter<T, E, Printers...> {};
+
+template <typename T, typename Printer, typename... Printers>
+struct FindFirstPrinter<
+    T, decltype(Printer::PrintValue(std::declval<const T&>(), nullptr)),
+    Printer, Printers...> {
+  using type = Printer;
+};
+
+// Select the best printer in the following order:
+//  - Print containers (they have begin/end/etc).
+//  - Print function pointers.
+//  - Print object pointers.
+//  - Use the stream operator, if available.
+//  - Print protocol buffers.
+//  - Print types convertible to BiggestInt.
+//  - Print types convertible to StringView, if available.
+//  - Fallback to printing the raw bytes of the object.
+template <typename T>
+void PrintWithFallback(const T& value, ::std::ostream* os) {
+  using Printer = typename FindFirstPrinter<
+      T, void, ContainerPrinter, FunctionPointerPrinter, PointerPrinter,
+      internal_stream_operator_without_lexical_name_lookup::StreamPrinter,
+      ProtobufPrinter, ConvertibleToIntegerPrinter,
+      ConvertibleToStringViewPrinter, RawBytesPrinter, FallbackPrinter>::type;
+  Printer::PrintValue(value, os);
+}
+
+// FormatForComparison<ToPrint, OtherOperand>::Format(value) formats a
+// value of type ToPrint that is an operand of a comparison assertion
+// (e.g. ASSERT_EQ).  OtherOperand is the type of the other operand in
+// the comparison, and is used to help determine the best way to
+// format the value.  In particular, when the value is a C string
+// (char pointer) and the other operand is an STL string object, we
+// want to format the C string as a string, since we know it is
+// compared by value with the string object.  If the value is a char
+// pointer but the other operand is not an STL string object, we don't
+// know whether the pointer is supposed to point to a NUL-terminated
+// string, and thus want to print it as a pointer to be safe.
+//
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+
+// The default case.
+template <typename ToPrint, typename OtherOperand>
+class FormatForComparison {
+ public:
+  static ::std::string Format(const ToPrint& value) {
+    return ::testing::PrintToString(value);
+  }
+};
+
+// Array.
+template <typename ToPrint, size_t N, typename OtherOperand>
+class FormatForComparison<ToPrint[N], OtherOperand> {
+ public:
+  static ::std::string Format(const ToPrint* value) {
+    return FormatForComparison<const ToPrint*, OtherOperand>::Format(value);
+  }
+};
+
+// By default, print C string as pointers to be safe, as we don't know
+// whether they actually point to a NUL-terminated string.
+
+#define GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(CharType)                \
+  template <typename OtherOperand>                                      \
+  class FormatForComparison<CharType*, OtherOperand> {                  \
+   public:                                                              \
+    static ::std::string Format(CharType* value) {                      \
+      return ::testing::PrintToString(static_cast<const void*>(value)); \
+    }                                                                   \
+  }
+
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char);
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char);
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(wchar_t);
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const wchar_t);
+#ifdef __cpp_char8_t
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char8_t);
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char8_t);
+#endif
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char16_t);
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char16_t);
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char32_t);
+GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char32_t);
+
+#undef GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_
+
+// If a C string is compared with an STL string object, we know it's meant
+// to point to a NUL-terminated string, and thus can print it as a string.
+
+#define GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(CharType, OtherStringType) \
+  template <>                                                           \
+  class FormatForComparison<CharType*, OtherStringType> {               \
+   public:                                                              \
+    static ::std::string Format(CharType* value) {                      \
+      return ::testing::PrintToString(value);                           \
+    }                                                                   \
+  }
+
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char, ::std::string);
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char, ::std::string);
+#ifdef __cpp_char8_t
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char8_t, ::std::u8string);
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char8_t, ::std::u8string);
+#endif
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char16_t, ::std::u16string);
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char16_t, ::std::u16string);
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char32_t, ::std::u32string);
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char32_t, ::std::u32string);
+
+#if GTEST_HAS_STD_WSTRING
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(wchar_t, ::std::wstring);
+GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const wchar_t, ::std::wstring);
+#endif
+
+#undef GTEST_IMPL_FORMAT_C_STRING_AS_STRING_
+
+// Formats a comparison assertion (e.g. ASSERT_EQ, EXPECT_LT, and etc)
+// operand to be used in a failure message.  The type (but not value)
+// of the other operand may affect the format.  This allows us to
+// print a char* as a raw pointer when it is compared against another
+// char* or void*, and print it as a C string when it is compared
+// against an std::string object, for example.
+//
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+template <typename T1, typename T2>
+std::string FormatForComparisonFailureMessage(
+    const T1& value, const T2& /* other_operand */) {
+  return FormatForComparison<T1, T2>::Format(value);
+}
+
+// UniversalPrinter<T>::Print(value, ostream_ptr) prints the given
+// value to the given ostream.  The caller must ensure that
+// 'ostream_ptr' is not NULL, or the behavior is undefined.
+//
+// We define UniversalPrinter as a class template (as opposed to a
+// function template), as we need to partially specialize it for
+// reference types, which cannot be done with function templates.
+template <typename T>
+class UniversalPrinter;
+
+// Prints the given value using the << operator if it has one;
+// otherwise prints the bytes in it.  This is what
+// UniversalPrinter<T>::Print() does when PrintTo() is not specialized
+// or overloaded for type T.
+//
+// A user can override this behavior for a class type Foo by defining
+// an overload of PrintTo() in the namespace where Foo is defined.  We
+// give the user this option as sometimes defining a << operator for
+// Foo is not desirable (e.g. the coding style may prevent doing it,
+// or there is already a << operator but it doesn't do what the user
+// wants).
+template <typename T>
+void PrintTo(const T& value, ::std::ostream* os) {
+  internal::PrintWithFallback(value, os);
+}
+
+// The following list of PrintTo() overloads tells
+// UniversalPrinter<T>::Print() how to print standard types (built-in
+// types, strings, plain arrays, and pointers).
+
+// Overloads for various char types.
+GTEST_API_ void PrintTo(unsigned char c, ::std::ostream* os);
+GTEST_API_ void PrintTo(signed char c, ::std::ostream* os);
+inline void PrintTo(char c, ::std::ostream* os) {
+  // When printing a plain char, we always treat it as unsigned.  This
+  // way, the output won't be affected by whether the compiler thinks
+  // char is signed or not.
+  PrintTo(static_cast<unsigned char>(c), os);
+}
+
+// Overloads for other simple built-in types.
+inline void PrintTo(bool x, ::std::ostream* os) {
+  *os << (x ? "true" : "false");
+}
+
+// Overload for wchar_t type.
+// Prints a wchar_t as a symbol if it is printable or as its internal
+// code otherwise and also as its decimal code (except for L'\0').
+// The L'\0' char is printed as "L'\\0'". The decimal code is printed
+// as signed integer when wchar_t is implemented by the compiler
+// as a signed type and is printed as an unsigned integer when wchar_t
+// is implemented as an unsigned type.
+GTEST_API_ void PrintTo(wchar_t wc, ::std::ostream* os);
+
+GTEST_API_ void PrintTo(char32_t c, ::std::ostream* os);
+inline void PrintTo(char16_t c, ::std::ostream* os) {
+  PrintTo(ImplicitCast_<char32_t>(c), os);
+}
+#ifdef __cpp_char8_t
+inline void PrintTo(char8_t c, ::std::ostream* os) {
+  PrintTo(ImplicitCast_<char32_t>(c), os);
+}
+#endif
+
+// Overloads for C strings.
+GTEST_API_ void PrintTo(const char* s, ::std::ostream* os);
+inline void PrintTo(char* s, ::std::ostream* os) {
+  PrintTo(ImplicitCast_<const char*>(s), os);
+}
+
+// signed/unsigned char is often used for representing binary data, so
+// we print pointers to it as void* to be safe.
+inline void PrintTo(const signed char* s, ::std::ostream* os) {
+  PrintTo(ImplicitCast_<const void*>(s), os);
+}
+inline void PrintTo(signed char* s, ::std::ostream* os) {
+  PrintTo(ImplicitCast_<const void*>(s), os);
+}
+inline void PrintTo(const unsigned char* s, ::std::ostream* os) {
+  PrintTo(ImplicitCast_<const void*>(s), os);
+}
+inline void PrintTo(unsigned char* s, ::std::ostream* os) {
+  PrintTo(ImplicitCast_<const void*>(s), os);
+}
+#ifdef __cpp_char8_t
+// Overloads for u8 strings.
+void PrintTo(const char8_t* s, ::std::ostream* os);
+inline void PrintTo(char8_t* s, ::std::ostream* os) {
+  PrintTo(ImplicitCast_<const char8_t*>(s), os);
+}
+#endif
+// Overloads for u16 strings.
+void PrintTo(const char16_t* s, ::std::ostream* os);
+inline void PrintTo(char16_t* s, ::std::ostream* os) {
+  PrintTo(ImplicitCast_<const char16_t*>(s), os);
+}
+// Overloads for u32 strings.
+void PrintTo(const char32_t* s, ::std::ostream* os);
+inline void PrintTo(char32_t* s, ::std::ostream* os) {
+  PrintTo(ImplicitCast_<const char32_t*>(s), os);
+}
+
+// MSVC can be configured to define wchar_t as a typedef of unsigned
+// short.  It defines _NATIVE_WCHAR_T_DEFINED when wchar_t is a native
+// type.  When wchar_t is a typedef, defining an overload for const
+// wchar_t* would cause unsigned short* be printed as a wide string,
+// possibly causing invalid memory accesses.
+#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
+// Overloads for wide C strings
+GTEST_API_ void PrintTo(const wchar_t* s, ::std::ostream* os);
+inline void PrintTo(wchar_t* s, ::std::ostream* os) {
+  PrintTo(ImplicitCast_<const wchar_t*>(s), os);
+}
+#endif
+
+// Overload for C arrays.  Multi-dimensional arrays are printed
+// properly.
+
+// Prints the given number of elements in an array, without printing
+// the curly braces.
+template <typename T>
+void PrintRawArrayTo(const T a[], size_t count, ::std::ostream* os) {
+  UniversalPrint(a[0], os);
+  for (size_t i = 1; i != count; i++) {
+    *os << ", ";
+    UniversalPrint(a[i], os);
+  }
+}
+
+// Overloads for ::std::string.
+GTEST_API_ void PrintStringTo(const ::std::string&s, ::std::ostream* os);
+inline void PrintTo(const ::std::string& s, ::std::ostream* os) {
+  PrintStringTo(s, os);
+}
+
+// Overloads for ::std::u8string
+#ifdef __cpp_char8_t
+GTEST_API_ void PrintU8StringTo(const ::std::u8string& s, ::std::ostream* os);
+inline void PrintTo(const ::std::u8string& s, ::std::ostream* os) {
+  PrintU8StringTo(s, os);
+}
+#endif
+
+// Overloads for ::std::u16string
+GTEST_API_ void PrintU16StringTo(const ::std::u16string& s, ::std::ostream* os);
+inline void PrintTo(const ::std::u16string& s, ::std::ostream* os) {
+  PrintU16StringTo(s, os);
+}
+
+// Overloads for ::std::u32string
+GTEST_API_ void PrintU32StringTo(const ::std::u32string& s, ::std::ostream* os);
+inline void PrintTo(const ::std::u32string& s, ::std::ostream* os) {
+  PrintU32StringTo(s, os);
+}
+
+// Overloads for ::std::wstring.
+#if GTEST_HAS_STD_WSTRING
+GTEST_API_ void PrintWideStringTo(const ::std::wstring&s, ::std::ostream* os);
+inline void PrintTo(const ::std::wstring& s, ::std::ostream* os) {
+  PrintWideStringTo(s, os);
+}
+#endif  // GTEST_HAS_STD_WSTRING
+
+#if GTEST_INTERNAL_HAS_STRING_VIEW
+// Overload for internal::StringView.
+inline void PrintTo(internal::StringView sp, ::std::ostream* os) {
+  PrintTo(::std::string(sp), os);
+}
+#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
+
+inline void PrintTo(std::nullptr_t, ::std::ostream* os) { *os << "(nullptr)"; }
+
+template <typename T>
+void PrintTo(std::reference_wrapper<T> ref, ::std::ostream* os) {
+  UniversalPrinter<T&>::Print(ref.get(), os);
+}
+
+inline const void* VoidifyPointer(const void* p) { return p; }
+inline const void* VoidifyPointer(volatile const void* p) {
+  return const_cast<const void*>(p);
+}
+
+template <typename T, typename Ptr>
+void PrintSmartPointer(const Ptr& ptr, std::ostream* os, char) {
+  if (ptr == nullptr) {
+    *os << "(nullptr)";
+  } else {
+    // We can't print the value. Just print the pointer..
+    *os << "(" << (VoidifyPointer)(ptr.get()) << ")";
+  }
+}
+template <typename T, typename Ptr,
+          typename = typename std::enable_if<!std::is_void<T>::value &&
+                                             !std::is_array<T>::value>::type>
+void PrintSmartPointer(const Ptr& ptr, std::ostream* os, int) {
+  if (ptr == nullptr) {
+    *os << "(nullptr)";
+  } else {
+    *os << "(ptr = " << (VoidifyPointer)(ptr.get()) << ", value = ";
+    UniversalPrinter<T>::Print(*ptr, os);
+    *os << ")";
+  }
+}
+
+template <typename T, typename D>
+void PrintTo(const std::unique_ptr<T, D>& ptr, std::ostream* os) {
+  (PrintSmartPointer<T>)(ptr, os, 0);
+}
+
+template <typename T>
+void PrintTo(const std::shared_ptr<T>& ptr, std::ostream* os) {
+  (PrintSmartPointer<T>)(ptr, os, 0);
+}
+
+// Helper function for printing a tuple.  T must be instantiated with
+// a tuple type.
+template <typename T>
+void PrintTupleTo(const T&, std::integral_constant<size_t, 0>,
+                  ::std::ostream*) {}
+
+template <typename T, size_t I>
+void PrintTupleTo(const T& t, std::integral_constant<size_t, I>,
+                  ::std::ostream* os) {
+  PrintTupleTo(t, std::integral_constant<size_t, I - 1>(), os);
+  GTEST_INTENTIONAL_CONST_COND_PUSH_()
+  if (I > 1) {
+    GTEST_INTENTIONAL_CONST_COND_POP_()
+    *os << ", ";
+  }
+  UniversalPrinter<typename std::tuple_element<I - 1, T>::type>::Print(
+      std::get<I - 1>(t), os);
+}
+
+template <typename... Types>
+void PrintTo(const ::std::tuple<Types...>& t, ::std::ostream* os) {
+  *os << "(";
+  PrintTupleTo(t, std::integral_constant<size_t, sizeof...(Types)>(), os);
+  *os << ")";
+}
+
+// Overload for std::pair.
+template <typename T1, typename T2>
+void PrintTo(const ::std::pair<T1, T2>& value, ::std::ostream* os) {
+  *os << '(';
+  // We cannot use UniversalPrint(value.first, os) here, as T1 may be
+  // a reference type.  The same for printing value.second.
+  UniversalPrinter<T1>::Print(value.first, os);
+  *os << ", ";
+  UniversalPrinter<T2>::Print(value.second, os);
+  *os << ')';
+}
+
+#if GTEST_HAS_RTTI
+inline void PrintTo(const ::std::type_info& value, ::std::ostream* os) {
+  internal::PrintTo<::std::type_info>(value, os);
+  *os << " (\"" << value.name() << "\")";
+}
+
+inline void PrintTo(const ::std::type_index& value, ::std::ostream* os) {
+  internal::PrintTo<::std::type_index>(value, os);
+  *os << " (\"" << value.name() << "\")";
+}
+#endif  // GTEST_HAS_RTTI
+
+// Implements printing a non-reference type T by letting the compiler
+// pick the right overload of PrintTo() for T.
+template <typename T>
+class UniversalPrinter {
+ public:
+  // MSVC warns about adding const to a function type, so we want to
+  // disable the warning.
+  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4180)
+
+  // Note: we deliberately don't call this PrintTo(), as that name
+  // conflicts with ::testing::internal::PrintTo in the body of the
+  // function.
+  static void Print(const T& value, ::std::ostream* os) {
+    // By default, ::testing::internal::PrintTo() is used for printing
+    // the value.
+    //
+    // Thanks to Koenig look-up, if T is a class and has its own
+    // PrintTo() function defined in its namespace, that function will
+    // be visible here.  Since it is more specific than the generic ones
+    // in ::testing::internal, it will be picked by the compiler in the
+    // following statement - exactly what we want.
+    PrintTo(value, os);
+  }
+
+  GTEST_DISABLE_MSC_WARNINGS_POP_()
+};
+
+// Remove any const-qualifiers before passing a type to UniversalPrinter.
+template <typename T>
+class UniversalPrinter<const T> : public UniversalPrinter<T> {};
+
+#if GTEST_INTERNAL_HAS_ANY
+
+// Printer for std::any / absl::any
+
+template <>
+class UniversalPrinter<Any> {
+ public:
+  static void Print(const Any& value, ::std::ostream* os) {
+    if (value.has_value()) {
+      *os << "value of type " << GetTypeName(value);
+    } else {
+      *os << "no value";
+    }
+  }
+
+ private:
+  static std::string GetTypeName(const Any& value) {
+#if GTEST_HAS_RTTI
+    return internal::GetTypeName(value.type());
+#else
+    static_cast<void>(value);  // possibly unused
+    return "<unknown_type>";
+#endif  // GTEST_HAS_RTTI
+  }
+};
+
+#endif  // GTEST_INTERNAL_HAS_ANY
+
+#if GTEST_INTERNAL_HAS_OPTIONAL
+
+// Printer for std::optional / absl::optional
+
+template <typename T>
+class UniversalPrinter<Optional<T>> {
+ public:
+  static void Print(const Optional<T>& value, ::std::ostream* os) {
+    *os << '(';
+    if (!value) {
+      *os << "nullopt";
+    } else {
+      UniversalPrint(*value, os);
+    }
+    *os << ')';
+  }
+};
+
+#endif  // GTEST_INTERNAL_HAS_OPTIONAL
+
+#if GTEST_INTERNAL_HAS_VARIANT
+
+// Printer for std::variant / absl::variant
+
+template <typename... T>
+class UniversalPrinter<Variant<T...>> {
+ public:
+  static void Print(const Variant<T...>& value, ::std::ostream* os) {
+    *os << '(';
+#if GTEST_HAS_ABSL
+    absl::visit(Visitor{os, value.index()}, value);
+#else
+    std::visit(Visitor{os, value.index()}, value);
+#endif  // GTEST_HAS_ABSL
+    *os << ')';
+  }
+
+ private:
+  struct Visitor {
+    template <typename U>
+    void operator()(const U& u) const {
+      *os << "'" << GetTypeName<U>() << "(index = " << index
+          << ")' with value ";
+      UniversalPrint(u, os);
+    }
+    ::std::ostream* os;
+    std::size_t index;
+  };
+};
+
+#endif  // GTEST_INTERNAL_HAS_VARIANT
+
+// UniversalPrintArray(begin, len, os) prints an array of 'len'
+// elements, starting at address 'begin'.
+template <typename T>
+void UniversalPrintArray(const T* begin, size_t len, ::std::ostream* os) {
+  if (len == 0) {
+    *os << "{}";
+  } else {
+    *os << "{ ";
+    const size_t kThreshold = 18;
+    const size_t kChunkSize = 8;
+    // If the array has more than kThreshold elements, we'll have to
+    // omit some details by printing only the first and the last
+    // kChunkSize elements.
+    if (len <= kThreshold) {
+      PrintRawArrayTo(begin, len, os);
+    } else {
+      PrintRawArrayTo(begin, kChunkSize, os);
+      *os << ", ..., ";
+      PrintRawArrayTo(begin + len - kChunkSize, kChunkSize, os);
+    }
+    *os << " }";
+  }
+}
+// This overload prints a (const) char array compactly.
+GTEST_API_ void UniversalPrintArray(
+    const char* begin, size_t len, ::std::ostream* os);
+
+#ifdef __cpp_char8_t
+// This overload prints a (const) char8_t array compactly.
+GTEST_API_ void UniversalPrintArray(const char8_t* begin, size_t len,
+                                    ::std::ostream* os);
+#endif
+
+// This overload prints a (const) char16_t array compactly.
+GTEST_API_ void UniversalPrintArray(const char16_t* begin, size_t len,
+                                    ::std::ostream* os);
+
+// This overload prints a (const) char32_t array compactly.
+GTEST_API_ void UniversalPrintArray(const char32_t* begin, size_t len,
+                                    ::std::ostream* os);
+
+// This overload prints a (const) wchar_t array compactly.
+GTEST_API_ void UniversalPrintArray(
+    const wchar_t* begin, size_t len, ::std::ostream* os);
+
+// Implements printing an array type T[N].
+template <typename T, size_t N>
+class UniversalPrinter<T[N]> {
+ public:
+  // Prints the given array, omitting some elements when there are too
+  // many.
+  static void Print(const T (&a)[N], ::std::ostream* os) {
+    UniversalPrintArray(a, N, os);
+  }
+};
+
+// Implements printing a reference type T&.
+template <typename T>
+class UniversalPrinter<T&> {
+ public:
+  // MSVC warns about adding const to a function type, so we want to
+  // disable the warning.
+  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4180)
+
+  static void Print(const T& value, ::std::ostream* os) {
+    // Prints the address of the value.  We use reinterpret_cast here
+    // as static_cast doesn't compile when T is a function type.
+    *os << "@" << reinterpret_cast<const void*>(&value) << " ";
+
+    // Then prints the value itself.
+    UniversalPrint(value, os);
+  }
+
+  GTEST_DISABLE_MSC_WARNINGS_POP_()
+};
+
+// Prints a value tersely: for a reference type, the referenced value
+// (but not the address) is printed; for a (const) char pointer, the
+// NUL-terminated string (but not the pointer) is printed.
+
+template <typename T>
+class UniversalTersePrinter {
+ public:
+  static void Print(const T& value, ::std::ostream* os) {
+    UniversalPrint(value, os);
+  }
+};
+template <typename T>
+class UniversalTersePrinter<T&> {
+ public:
+  static void Print(const T& value, ::std::ostream* os) {
+    UniversalPrint(value, os);
+  }
+};
+template <typename T, size_t N>
+class UniversalTersePrinter<T[N]> {
+ public:
+  static void Print(const T (&value)[N], ::std::ostream* os) {
+    UniversalPrinter<T[N]>::Print(value, os);
+  }
+};
+template <>
+class UniversalTersePrinter<const char*> {
+ public:
+  static void Print(const char* str, ::std::ostream* os) {
+    if (str == nullptr) {
+      *os << "NULL";
+    } else {
+      UniversalPrint(std::string(str), os);
+    }
+  }
+};
+template <>
+class UniversalTersePrinter<char*> : public UniversalTersePrinter<const char*> {
+};
+
+#ifdef __cpp_char8_t
+template <>
+class UniversalTersePrinter<const char8_t*> {
+ public:
+  static void Print(const char8_t* str, ::std::ostream* os) {
+    if (str == nullptr) {
+      *os << "NULL";
+    } else {
+      UniversalPrint(::std::u8string(str), os);
+    }
+  }
+};
+template <>
+class UniversalTersePrinter<char8_t*>
+    : public UniversalTersePrinter<const char8_t*> {};
+#endif
+
+template <>
+class UniversalTersePrinter<const char16_t*> {
+ public:
+  static void Print(const char16_t* str, ::std::ostream* os) {
+    if (str == nullptr) {
+      *os << "NULL";
+    } else {
+      UniversalPrint(::std::u16string(str), os);
+    }
+  }
+};
+template <>
+class UniversalTersePrinter<char16_t*>
+    : public UniversalTersePrinter<const char16_t*> {};
+
+template <>
+class UniversalTersePrinter<const char32_t*> {
+ public:
+  static void Print(const char32_t* str, ::std::ostream* os) {
+    if (str == nullptr) {
+      *os << "NULL";
+    } else {
+      UniversalPrint(::std::u32string(str), os);
+    }
+  }
+};
+template <>
+class UniversalTersePrinter<char32_t*>
+    : public UniversalTersePrinter<const char32_t*> {};
+
+#if GTEST_HAS_STD_WSTRING
+template <>
+class UniversalTersePrinter<const wchar_t*> {
+ public:
+  static void Print(const wchar_t* str, ::std::ostream* os) {
+    if (str == nullptr) {
+      *os << "NULL";
+    } else {
+      UniversalPrint(::std::wstring(str), os);
+    }
+  }
+};
+#endif
+
+template <>
+class UniversalTersePrinter<wchar_t*> {
+ public:
+  static void Print(wchar_t* str, ::std::ostream* os) {
+    UniversalTersePrinter<const wchar_t*>::Print(str, os);
+  }
+};
+
+template <typename T>
+void UniversalTersePrint(const T& value, ::std::ostream* os) {
+  UniversalTersePrinter<T>::Print(value, os);
+}
+
+// Prints a value using the type inferred by the compiler.  The
+// difference between this and UniversalTersePrint() is that for a
+// (const) char pointer, this prints both the pointer and the
+// NUL-terminated string.
+template <typename T>
+void UniversalPrint(const T& value, ::std::ostream* os) {
+  // A workarond for the bug in VC++ 7.1 that prevents us from instantiating
+  // UniversalPrinter with T directly.
+  typedef T T1;
+  UniversalPrinter<T1>::Print(value, os);
+}
+
+typedef ::std::vector< ::std::string> Strings;
+
+  // Tersely prints the first N fields of a tuple to a string vector,
+  // one element for each field.
+template <typename Tuple>
+void TersePrintPrefixToStrings(const Tuple&, std::integral_constant<size_t, 0>,
+                               Strings*) {}
+template <typename Tuple, size_t I>
+void TersePrintPrefixToStrings(const Tuple& t,
+                               std::integral_constant<size_t, I>,
+                               Strings* strings) {
+  TersePrintPrefixToStrings(t, std::integral_constant<size_t, I - 1>(),
+                            strings);
+  ::std::stringstream ss;
+  UniversalTersePrint(std::get<I - 1>(t), &ss);
+  strings->push_back(ss.str());
+}
+
+// Prints the fields of a tuple tersely to a string vector, one
+// element for each field.  See the comment before
+// UniversalTersePrint() for how we define "tersely".
+template <typename Tuple>
+Strings UniversalTersePrintTupleFieldsToStrings(const Tuple& value) {
+  Strings result;
+  TersePrintPrefixToStrings(
+      value, std::integral_constant<size_t, std::tuple_size<Tuple>::value>(),
+      &result);
+  return result;
+}
+
+}  // namespace internal
+
+template <typename T>
+::std::string PrintToString(const T& value) {
+  ::std::stringstream ss;
+  internal::UniversalTersePrinter<T>::Print(value, &ss);
+  return ss.str();
+}
+
+}  // namespace testing
+
+// Include any custom printer added by the local installation.
+// We must include this header at the end to make sure it can use the
+// declarations from this file.
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// This file provides an injection point for custom printers in a local
+// installation of gTest.
+// It will be included from gtest-printers.h and the overrides in this file
+// will be visible to everyone.
+//
+// Injection point for custom user configurations. See README for details
+//
+// ** Custom implementation starts here **
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
+#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
+
+// MSVC warning C5046 is new as of VS2017 version 15.8.
+#if defined(_MSC_VER) && _MSC_VER >= 1915
+#define GTEST_MAYBE_5046_ 5046
+#else
+#define GTEST_MAYBE_5046_
+#endif
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(
+    4251 GTEST_MAYBE_5046_ /* class A needs to have dll-interface to be used by
+                              clients of class B */
+    /* Symbol involving type with internal linkage not defined */)
+
+namespace testing {
+
+// To implement a matcher Foo for type T, define:
+//   1. a class FooMatcherMatcher that implements the matcher interface:
+//     using is_gtest_matcher = void;
+//     bool MatchAndExplain(const T&, std::ostream*);
+//       (MatchResultListener* can also be used instead of std::ostream*)
+//     void DescribeTo(std::ostream*);
+//     void DescribeNegationTo(std::ostream*);
+//
+//   2. a factory function that creates a Matcher<T> object from a
+//      FooMatcherMatcher.
+
+class MatchResultListener {
+ public:
+  // Creates a listener object with the given underlying ostream.  The
+  // listener does not own the ostream, and does not dereference it
+  // in the constructor or destructor.
+  explicit MatchResultListener(::std::ostream* os) : stream_(os) {}
+  virtual ~MatchResultListener() = 0;  // Makes this class abstract.
+
+  // Streams x to the underlying ostream; does nothing if the ostream
+  // is NULL.
+  template <typename T>
+  MatchResultListener& operator<<(const T& x) {
+    if (stream_ != nullptr) *stream_ << x;
+    return *this;
+  }
+
+  // Returns the underlying ostream.
+  ::std::ostream* stream() { return stream_; }
+
+  // Returns true if and only if the listener is interested in an explanation
+  // of the match result.  A matcher's MatchAndExplain() method can use
+  // this information to avoid generating the explanation when no one
+  // intends to hear it.
+  bool IsInterested() const { return stream_ != nullptr; }
+
+ private:
+  ::std::ostream* const stream_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(MatchResultListener);
+};
+
+inline MatchResultListener::~MatchResultListener() {
+}
+
+// An instance of a subclass of this knows how to describe itself as a
+// matcher.
+class MatcherDescriberInterface {
+ public:
+  virtual ~MatcherDescriberInterface() {}
+
+  // Describes this matcher to an ostream.  The function should print
+  // a verb phrase that describes the property a value matching this
+  // matcher should have.  The subject of the verb phrase is the value
+  // being matched.  For example, the DescribeTo() method of the Gt(7)
+  // matcher prints "is greater than 7".
+  virtual void DescribeTo(::std::ostream* os) const = 0;
+
+  // Describes the negation of this matcher to an ostream.  For
+  // example, if the description of this matcher is "is greater than
+  // 7", the negated description could be "is not greater than 7".
+  // You are not required to override this when implementing
+  // MatcherInterface, but it is highly advised so that your matcher
+  // can produce good error messages.
+  virtual void DescribeNegationTo(::std::ostream* os) const {
+    *os << "not (";
+    DescribeTo(os);
+    *os << ")";
+  }
+};
+
+// The implementation of a matcher.
+template <typename T>
+class MatcherInterface : public MatcherDescriberInterface {
+ public:
+  // Returns true if and only if the matcher matches x; also explains the
+  // match result to 'listener' if necessary (see the next paragraph), in
+  // the form of a non-restrictive relative clause ("which ...",
+  // "whose ...", etc) that describes x.  For example, the
+  // MatchAndExplain() method of the Pointee(...) matcher should
+  // generate an explanation like "which points to ...".
+  //
+  // Implementations of MatchAndExplain() should add an explanation of
+  // the match result *if and only if* they can provide additional
+  // information that's not already present (or not obvious) in the
+  // print-out of x and the matcher's description.  Whether the match
+  // succeeds is not a factor in deciding whether an explanation is
+  // needed, as sometimes the caller needs to print a failure message
+  // when the match succeeds (e.g. when the matcher is used inside
+  // Not()).
+  //
+  // For example, a "has at least 10 elements" matcher should explain
+  // what the actual element count is, regardless of the match result,
+  // as it is useful information to the reader; on the other hand, an
+  // "is empty" matcher probably only needs to explain what the actual
+  // size is when the match fails, as it's redundant to say that the
+  // size is 0 when the value is already known to be empty.
+  //
+  // You should override this method when defining a new matcher.
+  //
+  // It's the responsibility of the caller (Google Test) to guarantee
+  // that 'listener' is not NULL.  This helps to simplify a matcher's
+  // implementation when it doesn't care about the performance, as it
+  // can talk to 'listener' without checking its validity first.
+  // However, in order to implement dummy listeners efficiently,
+  // listener->stream() may be NULL.
+  virtual bool MatchAndExplain(T x, MatchResultListener* listener) const = 0;
+
+  // Inherits these methods from MatcherDescriberInterface:
+  //   virtual void DescribeTo(::std::ostream* os) const = 0;
+  //   virtual void DescribeNegationTo(::std::ostream* os) const;
+};
+
+namespace internal {
+
+struct AnyEq {
+  template <typename A, typename B>
+  bool operator()(const A& a, const B& b) const { return a == b; }
+};
+struct AnyNe {
+  template <typename A, typename B>
+  bool operator()(const A& a, const B& b) const { return a != b; }
+};
+struct AnyLt {
+  template <typename A, typename B>
+  bool operator()(const A& a, const B& b) const { return a < b; }
+};
+struct AnyGt {
+  template <typename A, typename B>
+  bool operator()(const A& a, const B& b) const { return a > b; }
+};
+struct AnyLe {
+  template <typename A, typename B>
+  bool operator()(const A& a, const B& b) const { return a <= b; }
+};
+struct AnyGe {
+  template <typename A, typename B>
+  bool operator()(const A& a, const B& b) const { return a >= b; }
+};
+
+// A match result listener that ignores the explanation.
+class DummyMatchResultListener : public MatchResultListener {
+ public:
+  DummyMatchResultListener() : MatchResultListener(nullptr) {}
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(DummyMatchResultListener);
+};
+
+// A match result listener that forwards the explanation to a given
+// ostream.  The difference between this and MatchResultListener is
+// that the former is concrete.
+class StreamMatchResultListener : public MatchResultListener {
+ public:
+  explicit StreamMatchResultListener(::std::ostream* os)
+      : MatchResultListener(os) {}
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(StreamMatchResultListener);
+};
+
+struct SharedPayloadBase {
+  std::atomic<int> ref{1};
+  void Ref() { ref.fetch_add(1, std::memory_order_relaxed); }
+  bool Unref() { return ref.fetch_sub(1, std::memory_order_acq_rel) == 1; }
+};
+
+template <typename T>
+struct SharedPayload : SharedPayloadBase {
+  explicit SharedPayload(const T& v) : value(v) {}
+  explicit SharedPayload(T&& v) : value(std::move(v)) {}
+
+  static void Destroy(SharedPayloadBase* shared) {
+    delete static_cast<SharedPayload*>(shared);
+  }
+
+  T value;
+};
+
+template <typename T>
+using is_trivially_copy_constructible =
+#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ < 5
+    std::has_trivial_copy_constructor<T>;
+#else
+    std::is_trivially_copy_constructible<T>;
+#endif
+
+// An internal class for implementing Matcher<T>, which will derive
+// from it.  We put functionalities common to all Matcher<T>
+// specializations here to avoid code duplication.
+template <typename T>
+class MatcherBase : private MatcherDescriberInterface {
+ public:
+  // Returns true if and only if the matcher matches x; also explains the
+  // match result to 'listener'.
+  bool MatchAndExplain(const T& x, MatchResultListener* listener) const {
+    GTEST_CHECK_(vtable_ != nullptr);
+    return vtable_->match_and_explain(*this, x, listener);
+  }
+
+  // Returns true if and only if this matcher matches x.
+  bool Matches(const T& x) const {
+    DummyMatchResultListener dummy;
+    return MatchAndExplain(x, &dummy);
+  }
+
+  // Describes this matcher to an ostream.
+  void DescribeTo(::std::ostream* os) const final {
+    GTEST_CHECK_(vtable_ != nullptr);
+    vtable_->describe(*this, os, false);
+  }
+
+  // Describes the negation of this matcher to an ostream.
+  void DescribeNegationTo(::std::ostream* os) const final {
+    GTEST_CHECK_(vtable_ != nullptr);
+    vtable_->describe(*this, os, true);
+  }
+
+  // Explains why x matches, or doesn't match, the matcher.
+  void ExplainMatchResultTo(const T& x, ::std::ostream* os) const {
+    StreamMatchResultListener listener(os);
+    MatchAndExplain(x, &listener);
+  }
+
+  // Returns the describer for this matcher object; retains ownership
+  // of the describer, which is only guaranteed to be alive when
+  // this matcher object is alive.
+  const MatcherDescriberInterface* GetDescriber() const {
+    if (vtable_ == nullptr) return nullptr;
+    return vtable_->get_describer(*this);
+  }
+
+ protected:
+  MatcherBase() : vtable_(nullptr) {}
+
+  // Constructs a matcher from its implementation.
+  template <typename U>
+  explicit MatcherBase(const MatcherInterface<U>* impl) {
+    Init(impl);
+  }
+
+  template <typename M, typename = typename std::remove_reference<
+                            M>::type::is_gtest_matcher>
+  MatcherBase(M&& m) {  // NOLINT
+    Init(std::forward<M>(m));
+  }
+
+  MatcherBase(const MatcherBase& other)
+      : vtable_(other.vtable_), buffer_(other.buffer_) {
+    if (IsShared()) buffer_.shared->Ref();
+  }
+
+  MatcherBase& operator=(const MatcherBase& other) {
+    if (this == &other) return *this;
+    Destroy();
+    vtable_ = other.vtable_;
+    buffer_ = other.buffer_;
+    if (IsShared()) buffer_.shared->Ref();
+    return *this;
+  }
+
+  MatcherBase(MatcherBase&& other)
+      : vtable_(other.vtable_), buffer_(other.buffer_) {
+    other.vtable_ = nullptr;
+  }
+
+  MatcherBase& operator=(MatcherBase&& other) {
+    if (this == &other) return *this;
+    Destroy();
+    vtable_ = other.vtable_;
+    buffer_ = other.buffer_;
+    other.vtable_ = nullptr;
+    return *this;
+  }
+
+  ~MatcherBase() override { Destroy(); }
+
+ private:
+  struct VTable {
+    bool (*match_and_explain)(const MatcherBase&, const T&,
+                              MatchResultListener*);
+    void (*describe)(const MatcherBase&, std::ostream*, bool negation);
+    // Returns the captured object if it implements the interface, otherwise
+    // returns the MatcherBase itself.
+    const MatcherDescriberInterface* (*get_describer)(const MatcherBase&);
+    // Called on shared instances when the reference count reaches 0.
+    void (*shared_destroy)(SharedPayloadBase*);
+  };
+
+  bool IsShared() const {
+    return vtable_ != nullptr && vtable_->shared_destroy != nullptr;
+  }
+
+  // If the implementation uses a listener, call that.
+  template <typename P>
+  static auto MatchAndExplainImpl(const MatcherBase& m, const T& value,
+                                  MatchResultListener* listener)
+      -> decltype(P::Get(m).MatchAndExplain(value, listener->stream())) {
+    return P::Get(m).MatchAndExplain(value, listener->stream());
+  }
+
+  template <typename P>
+  static auto MatchAndExplainImpl(const MatcherBase& m, const T& value,
+                                  MatchResultListener* listener)
+      -> decltype(P::Get(m).MatchAndExplain(value, listener)) {
+    return P::Get(m).MatchAndExplain(value, listener);
+  }
+
+  template <typename P>
+  static void DescribeImpl(const MatcherBase& m, std::ostream* os,
+                           bool negation) {
+    if (negation) {
+      P::Get(m).DescribeNegationTo(os);
+    } else {
+      P::Get(m).DescribeTo(os);
+    }
+  }
+
+  template <typename P>
+  static const MatcherDescriberInterface* GetDescriberImpl(
+      const MatcherBase& m) {
+    // If the impl is a MatcherDescriberInterface, then return it.
+    // Otherwise use MatcherBase itself.
+    // This allows us to implement the GetDescriber() function without support
+    // from the impl, but some users really want to get their impl back when
+    // they call GetDescriber().
+    // We use std::get on a tuple as a workaround of not having `if constexpr`.
+    return std::get<(
+        std::is_convertible<decltype(&P::Get(m)),
+                            const MatcherDescriberInterface*>::value
+            ? 1
+            : 0)>(std::make_tuple(&m, &P::Get(m)));
+  }
+
+  template <typename P>
+  const VTable* GetVTable() {
+    static constexpr VTable kVTable = {&MatchAndExplainImpl<P>,
+                                       &DescribeImpl<P>, &GetDescriberImpl<P>,
+                                       P::shared_destroy};
+    return &kVTable;
+  }
+
+  union Buffer {
+    // Add some types to give Buffer some common alignment/size use cases.
+    void* ptr;
+    double d;
+    int64_t i;
+    // And add one for the out-of-line cases.
+    SharedPayloadBase* shared;
+  };
+
+  void Destroy() {
+    if (IsShared() && buffer_.shared->Unref()) {
+      vtable_->shared_destroy(buffer_.shared);
+    }
+  }
+
+  template <typename M>
+  static constexpr bool IsInlined() {
+    return sizeof(M) <= sizeof(Buffer) && alignof(M) <= alignof(Buffer) &&
+           is_trivially_copy_constructible<M>::value &&
+           std::is_trivially_destructible<M>::value;
+  }
+
+  template <typename M, bool = MatcherBase::IsInlined<M>()>
+  struct ValuePolicy {
+    static const M& Get(const MatcherBase& m) {
+      // When inlined along with Init, need to be explicit to avoid violating
+      // strict aliasing rules.
+      const M *ptr = static_cast<const M*>(
+          static_cast<const void*>(&m.buffer_));
+      return *ptr;
+    }
+    static void Init(MatcherBase& m, M impl) {
+      ::new (static_cast<void*>(&m.buffer_)) M(impl);
+    }
+    static constexpr auto shared_destroy = nullptr;
+  };
+
+  template <typename M>
+  struct ValuePolicy<M, false> {
+    using Shared = SharedPayload<M>;
+    static const M& Get(const MatcherBase& m) {
+      return static_cast<Shared*>(m.buffer_.shared)->value;
+    }
+    template <typename Arg>
+    static void Init(MatcherBase& m, Arg&& arg) {
+      m.buffer_.shared = new Shared(std::forward<Arg>(arg));
+    }
+    static constexpr auto shared_destroy = &Shared::Destroy;
+  };
+
+  template <typename U, bool B>
+  struct ValuePolicy<const MatcherInterface<U>*, B> {
+    using M = const MatcherInterface<U>;
+    using Shared = SharedPayload<std::unique_ptr<M>>;
+    static const M& Get(const MatcherBase& m) {
+      return *static_cast<Shared*>(m.buffer_.shared)->value;
+    }
+    static void Init(MatcherBase& m, M* impl) {
+      m.buffer_.shared = new Shared(std::unique_ptr<M>(impl));
+    }
+
+    static constexpr auto shared_destroy = &Shared::Destroy;
+  };
+
+  template <typename M>
+  void Init(M&& m) {
+    using MM = typename std::decay<M>::type;
+    using Policy = ValuePolicy<MM>;
+    vtable_ = GetVTable<Policy>();
+    Policy::Init(*this, std::forward<M>(m));
+  }
+
+  const VTable* vtable_;
+  Buffer buffer_;
+};
+
+}  // namespace internal
+
+// A Matcher<T> is a copyable and IMMUTABLE (except by assignment)
+// object that can check whether a value of type T matches.  The
+// implementation of Matcher<T> is just a std::shared_ptr to const
+// MatcherInterface<T>.  Don't inherit from Matcher!
+template <typename T>
+class Matcher : public internal::MatcherBase<T> {
+ public:
+  // Constructs a null matcher.  Needed for storing Matcher objects in STL
+  // containers.  A default-constructed matcher is not yet initialized.  You
+  // cannot use it until a valid value has been assigned to it.
+  explicit Matcher() {}  // NOLINT
+
+  // Constructs a matcher from its implementation.
+  explicit Matcher(const MatcherInterface<const T&>* impl)
+      : internal::MatcherBase<T>(impl) {}
+
+  template <typename U>
+  explicit Matcher(
+      const MatcherInterface<U>* impl,
+      typename std::enable_if<!std::is_same<U, const U&>::value>::type* =
+          nullptr)
+      : internal::MatcherBase<T>(impl) {}
+
+  template <typename M, typename = typename std::remove_reference<
+                            M>::type::is_gtest_matcher>
+  Matcher(M&& m) : internal::MatcherBase<T>(std::forward<M>(m)) {}  // NOLINT
+
+  // Implicit constructor here allows people to write
+  // EXPECT_CALL(foo, Bar(5)) instead of EXPECT_CALL(foo, Bar(Eq(5))) sometimes
+  Matcher(T value);  // NOLINT
+};
+
+// The following two specializations allow the user to write str
+// instead of Eq(str) and "foo" instead of Eq("foo") when a std::string
+// matcher is expected.
+template <>
+class GTEST_API_ Matcher<const std::string&>
+    : public internal::MatcherBase<const std::string&> {
+ public:
+  Matcher() {}
+
+  explicit Matcher(const MatcherInterface<const std::string&>* impl)
+      : internal::MatcherBase<const std::string&>(impl) {}
+
+  template <typename M, typename = typename std::remove_reference<
+                            M>::type::is_gtest_matcher>
+  Matcher(M&& m)  // NOLINT
+      : internal::MatcherBase<const std::string&>(std::forward<M>(m)) {}
+
+  // Allows the user to write str instead of Eq(str) sometimes, where
+  // str is a std::string object.
+  Matcher(const std::string& s);  // NOLINT
+
+  // Allows the user to write "foo" instead of Eq("foo") sometimes.
+  Matcher(const char* s);  // NOLINT
+};
+
+template <>
+class GTEST_API_ Matcher<std::string>
+    : public internal::MatcherBase<std::string> {
+ public:
+  Matcher() {}
+
+  explicit Matcher(const MatcherInterface<const std::string&>* impl)
+      : internal::MatcherBase<std::string>(impl) {}
+  explicit Matcher(const MatcherInterface<std::string>* impl)
+      : internal::MatcherBase<std::string>(impl) {}
+
+  template <typename M, typename = typename std::remove_reference<
+                            M>::type::is_gtest_matcher>
+  Matcher(M&& m)  // NOLINT
+      : internal::MatcherBase<std::string>(std::forward<M>(m)) {}
+
+  // Allows the user to write str instead of Eq(str) sometimes, where
+  // str is a string object.
+  Matcher(const std::string& s);  // NOLINT
+
+  // Allows the user to write "foo" instead of Eq("foo") sometimes.
+  Matcher(const char* s);  // NOLINT
+};
+
+#if GTEST_INTERNAL_HAS_STRING_VIEW
+// The following two specializations allow the user to write str
+// instead of Eq(str) and "foo" instead of Eq("foo") when a absl::string_view
+// matcher is expected.
+template <>
+class GTEST_API_ Matcher<const internal::StringView&>
+    : public internal::MatcherBase<const internal::StringView&> {
+ public:
+  Matcher() {}
+
+  explicit Matcher(const MatcherInterface<const internal::StringView&>* impl)
+      : internal::MatcherBase<const internal::StringView&>(impl) {}
+
+  template <typename M, typename = typename std::remove_reference<
+                            M>::type::is_gtest_matcher>
+  Matcher(M&& m)  // NOLINT
+      : internal::MatcherBase<const internal::StringView&>(std::forward<M>(m)) {
+  }
+
+  // Allows the user to write str instead of Eq(str) sometimes, where
+  // str is a std::string object.
+  Matcher(const std::string& s);  // NOLINT
+
+  // Allows the user to write "foo" instead of Eq("foo") sometimes.
+  Matcher(const char* s);  // NOLINT
+
+  // Allows the user to pass absl::string_views or std::string_views directly.
+  Matcher(internal::StringView s);  // NOLINT
+};
+
+template <>
+class GTEST_API_ Matcher<internal::StringView>
+    : public internal::MatcherBase<internal::StringView> {
+ public:
+  Matcher() {}
+
+  explicit Matcher(const MatcherInterface<const internal::StringView&>* impl)
+      : internal::MatcherBase<internal::StringView>(impl) {}
+  explicit Matcher(const MatcherInterface<internal::StringView>* impl)
+      : internal::MatcherBase<internal::StringView>(impl) {}
+
+  template <typename M, typename = typename std::remove_reference<
+                            M>::type::is_gtest_matcher>
+  Matcher(M&& m)  // NOLINT
+      : internal::MatcherBase<internal::StringView>(std::forward<M>(m)) {}
+
+  // Allows the user to write str instead of Eq(str) sometimes, where
+  // str is a std::string object.
+  Matcher(const std::string& s);  // NOLINT
+
+  // Allows the user to write "foo" instead of Eq("foo") sometimes.
+  Matcher(const char* s);  // NOLINT
+
+  // Allows the user to pass absl::string_views or std::string_views directly.
+  Matcher(internal::StringView s);  // NOLINT
+};
+#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
+
+// Prints a matcher in a human-readable format.
+template <typename T>
+std::ostream& operator<<(std::ostream& os, const Matcher<T>& matcher) {
+  matcher.DescribeTo(&os);
+  return os;
+}
+
+// The PolymorphicMatcher class template makes it easy to implement a
+// polymorphic matcher (i.e. a matcher that can match values of more
+// than one type, e.g. Eq(n) and NotNull()).
+//
+// To define a polymorphic matcher, a user should provide an Impl
+// class that has a DescribeTo() method and a DescribeNegationTo()
+// method, and define a member function (or member function template)
+//
+//   bool MatchAndExplain(const Value& value,
+//                        MatchResultListener* listener) const;
+//
+// See the definition of NotNull() for a complete example.
+template <class Impl>
+class PolymorphicMatcher {
+ public:
+  explicit PolymorphicMatcher(const Impl& an_impl) : impl_(an_impl) {}
+
+  // Returns a mutable reference to the underlying matcher
+  // implementation object.
+  Impl& mutable_impl() { return impl_; }
+
+  // Returns an immutable reference to the underlying matcher
+  // implementation object.
+  const Impl& impl() const { return impl_; }
+
+  template <typename T>
+  operator Matcher<T>() const {
+    return Matcher<T>(new MonomorphicImpl<const T&>(impl_));
+  }
+
+ private:
+  template <typename T>
+  class MonomorphicImpl : public MatcherInterface<T> {
+   public:
+    explicit MonomorphicImpl(const Impl& impl) : impl_(impl) {}
+
+    void DescribeTo(::std::ostream* os) const override { impl_.DescribeTo(os); }
+
+    void DescribeNegationTo(::std::ostream* os) const override {
+      impl_.DescribeNegationTo(os);
+    }
+
+    bool MatchAndExplain(T x, MatchResultListener* listener) const override {
+      return impl_.MatchAndExplain(x, listener);
+    }
+
+   private:
+    const Impl impl_;
+  };
+
+  Impl impl_;
+};
+
+// Creates a matcher from its implementation.
+// DEPRECATED: Especially in the generic code, prefer:
+//   Matcher<T>(new MyMatcherImpl<const T&>(...));
+//
+// MakeMatcher may create a Matcher that accepts its argument by value, which
+// leads to unnecessary copies & lack of support for non-copyable types.
+template <typename T>
+inline Matcher<T> MakeMatcher(const MatcherInterface<T>* impl) {
+  return Matcher<T>(impl);
+}
+
+// Creates a polymorphic matcher from its implementation.  This is
+// easier to use than the PolymorphicMatcher<Impl> constructor as it
+// doesn't require you to explicitly write the template argument, e.g.
+//
+//   MakePolymorphicMatcher(foo);
+// vs
+//   PolymorphicMatcher<TypeOfFoo>(foo);
+template <class Impl>
+inline PolymorphicMatcher<Impl> MakePolymorphicMatcher(const Impl& impl) {
+  return PolymorphicMatcher<Impl>(impl);
+}
+
+namespace internal {
+// Implements a matcher that compares a given value with a
+// pre-supplied value using one of the ==, <=, <, etc, operators.  The
+// two values being compared don't have to have the same type.
+//
+// The matcher defined here is polymorphic (for example, Eq(5) can be
+// used to match an int, a short, a double, etc).  Therefore we use
+// a template type conversion operator in the implementation.
+//
+// The following template definition assumes that the Rhs parameter is
+// a "bare" type (i.e. neither 'const T' nor 'T&').
+template <typename D, typename Rhs, typename Op>
+class ComparisonBase {
+ public:
+  explicit ComparisonBase(const Rhs& rhs) : rhs_(rhs) {}
+
+  using is_gtest_matcher = void;
+
+  template <typename Lhs>
+  bool MatchAndExplain(const Lhs& lhs, std::ostream*) const {
+    return Op()(lhs, Unwrap(rhs_));
+  }
+  void DescribeTo(std::ostream* os) const {
+    *os << D::Desc() << " ";
+    UniversalPrint(Unwrap(rhs_), os);
+  }
+  void DescribeNegationTo(std::ostream* os) const {
+    *os << D::NegatedDesc() << " ";
+    UniversalPrint(Unwrap(rhs_), os);
+  }
+
+ private:
+  template <typename T>
+  static const T& Unwrap(const T& v) {
+    return v;
+  }
+  template <typename T>
+  static const T& Unwrap(std::reference_wrapper<T> v) {
+    return v;
+  }
+
+  Rhs rhs_;
+};
+
+template <typename Rhs>
+class EqMatcher : public ComparisonBase<EqMatcher<Rhs>, Rhs, AnyEq> {
+ public:
+  explicit EqMatcher(const Rhs& rhs)
+      : ComparisonBase<EqMatcher<Rhs>, Rhs, AnyEq>(rhs) { }
+  static const char* Desc() { return "is equal to"; }
+  static const char* NegatedDesc() { return "isn't equal to"; }
+};
+template <typename Rhs>
+class NeMatcher : public ComparisonBase<NeMatcher<Rhs>, Rhs, AnyNe> {
+ public:
+  explicit NeMatcher(const Rhs& rhs)
+      : ComparisonBase<NeMatcher<Rhs>, Rhs, AnyNe>(rhs) { }
+  static const char* Desc() { return "isn't equal to"; }
+  static const char* NegatedDesc() { return "is equal to"; }
+};
+template <typename Rhs>
+class LtMatcher : public ComparisonBase<LtMatcher<Rhs>, Rhs, AnyLt> {
+ public:
+  explicit LtMatcher(const Rhs& rhs)
+      : ComparisonBase<LtMatcher<Rhs>, Rhs, AnyLt>(rhs) { }
+  static const char* Desc() { return "is <"; }
+  static const char* NegatedDesc() { return "isn't <"; }
+};
+template <typename Rhs>
+class GtMatcher : public ComparisonBase<GtMatcher<Rhs>, Rhs, AnyGt> {
+ public:
+  explicit GtMatcher(const Rhs& rhs)
+      : ComparisonBase<GtMatcher<Rhs>, Rhs, AnyGt>(rhs) { }
+  static const char* Desc() { return "is >"; }
+  static const char* NegatedDesc() { return "isn't >"; }
+};
+template <typename Rhs>
+class LeMatcher : public ComparisonBase<LeMatcher<Rhs>, Rhs, AnyLe> {
+ public:
+  explicit LeMatcher(const Rhs& rhs)
+      : ComparisonBase<LeMatcher<Rhs>, Rhs, AnyLe>(rhs) { }
+  static const char* Desc() { return "is <="; }
+  static const char* NegatedDesc() { return "isn't <="; }
+};
+template <typename Rhs>
+class GeMatcher : public ComparisonBase<GeMatcher<Rhs>, Rhs, AnyGe> {
+ public:
+  explicit GeMatcher(const Rhs& rhs)
+      : ComparisonBase<GeMatcher<Rhs>, Rhs, AnyGe>(rhs) { }
+  static const char* Desc() { return "is >="; }
+  static const char* NegatedDesc() { return "isn't >="; }
+};
+
+template <typename T, typename = typename std::enable_if<
+                          std::is_constructible<std::string, T>::value>::type>
+using StringLike = T;
+
+// Implements polymorphic matchers MatchesRegex(regex) and
+// ContainsRegex(regex), which can be used as a Matcher<T> as long as
+// T can be converted to a string.
+class MatchesRegexMatcher {
+ public:
+  MatchesRegexMatcher(const RE* regex, bool full_match)
+      : regex_(regex), full_match_(full_match) {}
+
+#if GTEST_INTERNAL_HAS_STRING_VIEW
+  bool MatchAndExplain(const internal::StringView& s,
+                       MatchResultListener* listener) const {
+    return MatchAndExplain(std::string(s), listener);
+  }
+#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
+
+  // Accepts pointer types, particularly:
+  //   const char*
+  //   char*
+  //   const wchar_t*
+  //   wchar_t*
+  template <typename CharType>
+  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
+    return s != nullptr && MatchAndExplain(std::string(s), listener);
+  }
+
+  // Matches anything that can convert to std::string.
+  //
+  // This is a template, not just a plain function with const std::string&,
+  // because absl::string_view has some interfering non-explicit constructors.
+  template <class MatcheeStringType>
+  bool MatchAndExplain(const MatcheeStringType& s,
+                       MatchResultListener* /* listener */) const {
+    const std::string& s2(s);
+    return full_match_ ? RE::FullMatch(s2, *regex_)
+                       : RE::PartialMatch(s2, *regex_);
+  }
+
+  void DescribeTo(::std::ostream* os) const {
+    *os << (full_match_ ? "matches" : "contains") << " regular expression ";
+    UniversalPrinter<std::string>::Print(regex_->pattern(), os);
+  }
+
+  void DescribeNegationTo(::std::ostream* os) const {
+    *os << "doesn't " << (full_match_ ? "match" : "contain")
+        << " regular expression ";
+    UniversalPrinter<std::string>::Print(regex_->pattern(), os);
+  }
+
+ private:
+  const std::shared_ptr<const RE> regex_;
+  const bool full_match_;
+};
+}  // namespace internal
+
+// Matches a string that fully matches regular expression 'regex'.
+// The matcher takes ownership of 'regex'.
+inline PolymorphicMatcher<internal::MatchesRegexMatcher> MatchesRegex(
+    const internal::RE* regex) {
+  return MakePolymorphicMatcher(internal::MatchesRegexMatcher(regex, true));
+}
+template <typename T = std::string>
+PolymorphicMatcher<internal::MatchesRegexMatcher> MatchesRegex(
+    const internal::StringLike<T>& regex) {
+  return MatchesRegex(new internal::RE(std::string(regex)));
+}
+
+// Matches a string that contains regular expression 'regex'.
+// The matcher takes ownership of 'regex'.
+inline PolymorphicMatcher<internal::MatchesRegexMatcher> ContainsRegex(
+    const internal::RE* regex) {
+  return MakePolymorphicMatcher(internal::MatchesRegexMatcher(regex, false));
+}
+template <typename T = std::string>
+PolymorphicMatcher<internal::MatchesRegexMatcher> ContainsRegex(
+    const internal::StringLike<T>& regex) {
+  return ContainsRegex(new internal::RE(std::string(regex)));
+}
+
+// Creates a polymorphic matcher that matches anything equal to x.
+// Note: if the parameter of Eq() were declared as const T&, Eq("foo")
+// wouldn't compile.
+template <typename T>
+inline internal::EqMatcher<T> Eq(T x) { return internal::EqMatcher<T>(x); }
+
+// Constructs a Matcher<T> from a 'value' of type T.  The constructed
+// matcher matches any value that's equal to 'value'.
+template <typename T>
+Matcher<T>::Matcher(T value) { *this = Eq(value); }
+
+// Creates a monomorphic matcher that matches anything with type Lhs
+// and equal to rhs.  A user may need to use this instead of Eq(...)
+// in order to resolve an overloading ambiguity.
+//
+// TypedEq<T>(x) is just a convenient short-hand for Matcher<T>(Eq(x))
+// or Matcher<T>(x), but more readable than the latter.
+//
+// We could define similar monomorphic matchers for other comparison
+// operations (e.g. TypedLt, TypedGe, and etc), but decided not to do
+// it yet as those are used much less than Eq() in practice.  A user
+// can always write Matcher<T>(Lt(5)) to be explicit about the type,
+// for example.
+template <typename Lhs, typename Rhs>
+inline Matcher<Lhs> TypedEq(const Rhs& rhs) { return Eq(rhs); }
+
+// Creates a polymorphic matcher that matches anything >= x.
+template <typename Rhs>
+inline internal::GeMatcher<Rhs> Ge(Rhs x) {
+  return internal::GeMatcher<Rhs>(x);
+}
+
+// Creates a polymorphic matcher that matches anything > x.
+template <typename Rhs>
+inline internal::GtMatcher<Rhs> Gt(Rhs x) {
+  return internal::GtMatcher<Rhs>(x);
+}
+
+// Creates a polymorphic matcher that matches anything <= x.
+template <typename Rhs>
+inline internal::LeMatcher<Rhs> Le(Rhs x) {
+  return internal::LeMatcher<Rhs>(x);
+}
+
+// Creates a polymorphic matcher that matches anything < x.
+template <typename Rhs>
+inline internal::LtMatcher<Rhs> Lt(Rhs x) {
+  return internal::LtMatcher<Rhs>(x);
+}
+
+// Creates a polymorphic matcher that matches anything != x.
+template <typename Rhs>
+inline internal::NeMatcher<Rhs> Ne(Rhs x) {
+  return internal::NeMatcher<Rhs>(x);
+}
+}  // namespace testing
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251 5046
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
+
+#include <stdio.h>
+#include <memory>
+
+namespace testing {
+namespace internal {
+
+GTEST_DECLARE_string_(internal_run_death_test);
+
+// Names of the flags (needed for parsing Google Test flags).
+const char kDeathTestStyleFlag[] = "death_test_style";
+const char kDeathTestUseFork[] = "death_test_use_fork";
+const char kInternalRunDeathTestFlag[] = "internal_run_death_test";
+
+#if GTEST_HAS_DEATH_TEST
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
+/* class A needs to have dll-interface to be used by clients of class B */)
+
+// DeathTest is a class that hides much of the complexity of the
+// GTEST_DEATH_TEST_ macro.  It is abstract; its static Create method
+// returns a concrete class that depends on the prevailing death test
+// style, as defined by the --gtest_death_test_style and/or
+// --gtest_internal_run_death_test flags.
+
+// In describing the results of death tests, these terms are used with
+// the corresponding definitions:
+//
+// exit status:  The integer exit information in the format specified
+//               by wait(2)
+// exit code:    The integer code passed to exit(3), _exit(2), or
+//               returned from main()
+class GTEST_API_ DeathTest {
+ public:
+  // Create returns false if there was an error determining the
+  // appropriate action to take for the current death test; for example,
+  // if the gtest_death_test_style flag is set to an invalid value.
+  // The LastMessage method will return a more detailed message in that
+  // case.  Otherwise, the DeathTest pointer pointed to by the "test"
+  // argument is set.  If the death test should be skipped, the pointer
+  // is set to NULL; otherwise, it is set to the address of a new concrete
+  // DeathTest object that controls the execution of the current test.
+  static bool Create(const char* statement, Matcher<const std::string&> matcher,
+                     const char* file, int line, DeathTest** test);
+  DeathTest();
+  virtual ~DeathTest() { }
+
+  // A helper class that aborts a death test when it's deleted.
+  class ReturnSentinel {
+   public:
+    explicit ReturnSentinel(DeathTest* test) : test_(test) { }
+    ~ReturnSentinel() { test_->Abort(TEST_ENCOUNTERED_RETURN_STATEMENT); }
+   private:
+    DeathTest* const test_;
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(ReturnSentinel);
+  } GTEST_ATTRIBUTE_UNUSED_;
+
+  // An enumeration of possible roles that may be taken when a death
+  // test is encountered.  EXECUTE means that the death test logic should
+  // be executed immediately.  OVERSEE means that the program should prepare
+  // the appropriate environment for a child process to execute the death
+  // test, then wait for it to complete.
+  enum TestRole { OVERSEE_TEST, EXECUTE_TEST };
+
+  // An enumeration of the three reasons that a test might be aborted.
+  enum AbortReason {
+    TEST_ENCOUNTERED_RETURN_STATEMENT,
+    TEST_THREW_EXCEPTION,
+    TEST_DID_NOT_DIE
+  };
+
+  // Assumes one of the above roles.
+  virtual TestRole AssumeRole() = 0;
+
+  // Waits for the death test to finish and returns its status.
+  virtual int Wait() = 0;
+
+  // Returns true if the death test passed; that is, the test process
+  // exited during the test, its exit status matches a user-supplied
+  // predicate, and its stderr output matches a user-supplied regular
+  // expression.
+  // The user-supplied predicate may be a macro expression rather
+  // than a function pointer or functor, or else Wait and Passed could
+  // be combined.
+  virtual bool Passed(bool exit_status_ok) = 0;
+
+  // Signals that the death test did not die as expected.
+  virtual void Abort(AbortReason reason) = 0;
+
+  // Returns a human-readable outcome message regarding the outcome of
+  // the last death test.
+  static const char* LastMessage();
+
+  static void set_last_death_test_message(const std::string& message);
+
+ private:
+  // A string containing a description of the outcome of the last death test.
+  static std::string last_death_test_message_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(DeathTest);
+};
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
+
+// Factory interface for death tests.  May be mocked out for testing.
+class DeathTestFactory {
+ public:
+  virtual ~DeathTestFactory() { }
+  virtual bool Create(const char* statement,
+                      Matcher<const std::string&> matcher, const char* file,
+                      int line, DeathTest** test) = 0;
+};
+
+// A concrete DeathTestFactory implementation for normal use.
+class DefaultDeathTestFactory : public DeathTestFactory {
+ public:
+  bool Create(const char* statement, Matcher<const std::string&> matcher,
+              const char* file, int line, DeathTest** test) override;
+};
+
+// Returns true if exit_status describes a process that was terminated
+// by a signal, or exited normally with a nonzero exit code.
+GTEST_API_ bool ExitedUnsuccessfully(int exit_status);
+
+// A string passed to EXPECT_DEATH (etc.) is caught by one of these overloads
+// and interpreted as a regex (rather than an Eq matcher) for legacy
+// compatibility.
+inline Matcher<const ::std::string&> MakeDeathTestMatcher(
+    ::testing::internal::RE regex) {
+  return ContainsRegex(regex.pattern());
+}
+inline Matcher<const ::std::string&> MakeDeathTestMatcher(const char* regex) {
+  return ContainsRegex(regex);
+}
+inline Matcher<const ::std::string&> MakeDeathTestMatcher(
+    const ::std::string& regex) {
+  return ContainsRegex(regex);
+}
+
+// If a Matcher<const ::std::string&> is passed to EXPECT_DEATH (etc.), it's
+// used directly.
+inline Matcher<const ::std::string&> MakeDeathTestMatcher(
+    Matcher<const ::std::string&> matcher) {
+  return matcher;
+}
+
+// Traps C++ exceptions escaping statement and reports them as test
+// failures. Note that trapping SEH exceptions is not implemented here.
+# if GTEST_HAS_EXCEPTIONS
+#  define GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, death_test) \
+  try { \
+    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
+  } catch (const ::std::exception& gtest_exception) { \
+    fprintf(\
+        stderr, \
+        "\n%s: Caught std::exception-derived exception escaping the " \
+        "death test statement. Exception message: %s\n", \
+        ::testing::internal::FormatFileLocation(__FILE__, __LINE__).c_str(), \
+        gtest_exception.what()); \
+    fflush(stderr); \
+    death_test->Abort(::testing::internal::DeathTest::TEST_THREW_EXCEPTION); \
+  } catch (...) { \
+    death_test->Abort(::testing::internal::DeathTest::TEST_THREW_EXCEPTION); \
+  }
+
+# else
+#  define GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, death_test) \
+  GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
+
+# endif
+
+// This macro is for implementing ASSERT_DEATH*, EXPECT_DEATH*,
+// ASSERT_EXIT*, and EXPECT_EXIT*.
+#define GTEST_DEATH_TEST_(statement, predicate, regex_or_matcher, fail)        \
+  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                                \
+  if (::testing::internal::AlwaysTrue()) {                                     \
+    ::testing::internal::DeathTest* gtest_dt;                                  \
+    if (!::testing::internal::DeathTest::Create(                               \
+            #statement,                                                        \
+            ::testing::internal::MakeDeathTestMatcher(regex_or_matcher),       \
+            __FILE__, __LINE__, &gtest_dt)) {                                  \
+      goto GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__);                        \
+    }                                                                          \
+    if (gtest_dt != nullptr) {                                                 \
+      std::unique_ptr< ::testing::internal::DeathTest> gtest_dt_ptr(gtest_dt); \
+      switch (gtest_dt->AssumeRole()) {                                        \
+        case ::testing::internal::DeathTest::OVERSEE_TEST:                     \
+          if (!gtest_dt->Passed(predicate(gtest_dt->Wait()))) {                \
+            goto GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__);                  \
+          }                                                                    \
+          break;                                                               \
+        case ::testing::internal::DeathTest::EXECUTE_TEST: {                   \
+          ::testing::internal::DeathTest::ReturnSentinel gtest_sentinel(       \
+              gtest_dt);                                                       \
+          GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, gtest_dt);            \
+          gtest_dt->Abort(::testing::internal::DeathTest::TEST_DID_NOT_DIE);   \
+          break;                                                               \
+        }                                                                      \
+        default:                                                               \
+          break;                                                               \
+      }                                                                        \
+    }                                                                          \
+  } else                                                                       \
+    GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__)                                \
+        : fail(::testing::internal::DeathTest::LastMessage())
+// The symbol "fail" here expands to something into which a message
+// can be streamed.
+
+// This macro is for implementing ASSERT/EXPECT_DEBUG_DEATH when compiled in
+// NDEBUG mode. In this case we need the statements to be executed and the macro
+// must accept a streamed message even though the message is never printed.
+// The regex object is not evaluated, but it is used to prevent "unused"
+// warnings and to avoid an expression that doesn't compile in debug mode.
+#define GTEST_EXECUTE_STATEMENT_(statement, regex_or_matcher)    \
+  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                  \
+  if (::testing::internal::AlwaysTrue()) {                       \
+    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement);   \
+  } else if (!::testing::internal::AlwaysTrue()) {               \
+    ::testing::internal::MakeDeathTestMatcher(regex_or_matcher); \
+  } else                                                         \
+    ::testing::Message()
+
+// A class representing the parsed contents of the
+// --gtest_internal_run_death_test flag, as it existed when
+// RUN_ALL_TESTS was called.
+class InternalRunDeathTestFlag {
+ public:
+  InternalRunDeathTestFlag(const std::string& a_file,
+                           int a_line,
+                           int an_index,
+                           int a_write_fd)
+      : file_(a_file), line_(a_line), index_(an_index),
+        write_fd_(a_write_fd) {}
+
+  ~InternalRunDeathTestFlag() {
+    if (write_fd_ >= 0)
+      posix::Close(write_fd_);
+  }
+
+  const std::string& file() const { return file_; }
+  int line() const { return line_; }
+  int index() const { return index_; }
+  int write_fd() const { return write_fd_; }
+
+ private:
+  std::string file_;
+  int line_;
+  int index_;
+  int write_fd_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(InternalRunDeathTestFlag);
+};
+
+// Returns a newly created InternalRunDeathTestFlag object with fields
+// initialized from the GTEST_FLAG(internal_run_death_test) flag if
+// the flag is specified; otherwise returns NULL.
+InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag();
+
+#endif  // GTEST_HAS_DEATH_TEST
+
+}  // namespace internal
+}  // namespace testing
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
+
+namespace testing {
+
+// This flag controls the style of death tests.  Valid values are "threadsafe",
+// meaning that the death test child process will re-execute the test binary
+// from the start, running only a single death test, or "fast",
+// meaning that the child process will execute the test logic immediately
+// after forking.
+GTEST_DECLARE_string_(death_test_style);
+
+#if GTEST_HAS_DEATH_TEST
+
+namespace internal {
+
+// Returns a Boolean value indicating whether the caller is currently
+// executing in the context of the death test child process.  Tools such as
+// Valgrind heap checkers may need this to modify their behavior in death
+// tests.  IMPORTANT: This is an internal utility.  Using it may break the
+// implementation of death tests.  User code MUST NOT use it.
+GTEST_API_ bool InDeathTestChild();
+
+}  // namespace internal
+
+// The following macros are useful for writing death tests.
+
+// Here's what happens when an ASSERT_DEATH* or EXPECT_DEATH* is
+// executed:
+//
+//   1. It generates a warning if there is more than one active
+//   thread.  This is because it's safe to fork() or clone() only
+//   when there is a single thread.
+//
+//   2. The parent process clone()s a sub-process and runs the death
+//   test in it; the sub-process exits with code 0 at the end of the
+//   death test, if it hasn't exited already.
+//
+//   3. The parent process waits for the sub-process to terminate.
+//
+//   4. The parent process checks the exit code and error message of
+//   the sub-process.
+//
+// Examples:
+//
+//   ASSERT_DEATH(server.SendMessage(56, "Hello"), "Invalid port number");
+//   for (int i = 0; i < 5; i++) {
+//     EXPECT_DEATH(server.ProcessRequest(i),
+//                  "Invalid request .* in ProcessRequest()")
+//                  << "Failed to die on request " << i;
+//   }
+//
+//   ASSERT_EXIT(server.ExitNow(), ::testing::ExitedWithCode(0), "Exiting");
+//
+//   bool KilledBySIGHUP(int exit_code) {
+//     return WIFSIGNALED(exit_code) && WTERMSIG(exit_code) == SIGHUP;
+//   }
+//
+//   ASSERT_EXIT(client.HangUpServer(), KilledBySIGHUP, "Hanging up!");
+//
+// On the regular expressions used in death tests:
+//
+//   GOOGLETEST_CM0005 DO NOT DELETE
+//   On POSIX-compliant systems (*nix), we use the <regex.h> library,
+//   which uses the POSIX extended regex syntax.
+//
+//   On other platforms (e.g. Windows or Mac), we only support a simple regex
+//   syntax implemented as part of Google Test.  This limited
+//   implementation should be enough most of the time when writing
+//   death tests; though it lacks many features you can find in PCRE
+//   or POSIX extended regex syntax.  For example, we don't support
+//   union ("x|y"), grouping ("(xy)"), brackets ("[xy]"), and
+//   repetition count ("x{5,7}"), among others.
+//
+//   Below is the syntax that we do support.  We chose it to be a
+//   subset of both PCRE and POSIX extended regex, so it's easy to
+//   learn wherever you come from.  In the following: 'A' denotes a
+//   literal character, period (.), or a single \\ escape sequence;
+//   'x' and 'y' denote regular expressions; 'm' and 'n' are for
+//   natural numbers.
+//
+//     c     matches any literal character c
+//     \\d   matches any decimal digit
+//     \\D   matches any character that's not a decimal digit
+//     \\f   matches \f
+//     \\n   matches \n
+//     \\r   matches \r
+//     \\s   matches any ASCII whitespace, including \n
+//     \\S   matches any character that's not a whitespace
+//     \\t   matches \t
+//     \\v   matches \v
+//     \\w   matches any letter, _, or decimal digit
+//     \\W   matches any character that \\w doesn't match
+//     \\c   matches any literal character c, which must be a punctuation
+//     .     matches any single character except \n
+//     A?    matches 0 or 1 occurrences of A
+//     A*    matches 0 or many occurrences of A
+//     A+    matches 1 or many occurrences of A
+//     ^     matches the beginning of a string (not that of each line)
+//     $     matches the end of a string (not that of each line)
+//     xy    matches x followed by y
+//
+//   If you accidentally use PCRE or POSIX extended regex features
+//   not implemented by us, you will get a run-time failure.  In that
+//   case, please try to rewrite your regular expression within the
+//   above syntax.
+//
+//   This implementation is *not* meant to be as highly tuned or robust
+//   as a compiled regex library, but should perform well enough for a
+//   death test, which already incurs significant overhead by launching
+//   a child process.
+//
+// Known caveats:
+//
+//   A "threadsafe" style death test obtains the path to the test
+//   program from argv[0] and re-executes it in the sub-process.  For
+//   simplicity, the current implementation doesn't search the PATH
+//   when launching the sub-process.  This means that the user must
+//   invoke the test program via a path that contains at least one
+//   path separator (e.g. path/to/foo_test and
+//   /absolute/path/to/bar_test are fine, but foo_test is not).  This
+//   is rarely a problem as people usually don't put the test binary
+//   directory in PATH.
+//
+
+// Asserts that a given statement causes the program to exit, with an
+// integer exit status that satisfies predicate, and emitting error output
+// that matches regex.
+# define ASSERT_EXIT(statement, predicate, regex) \
+    GTEST_DEATH_TEST_(statement, predicate, regex, GTEST_FATAL_FAILURE_)
+
+// Like ASSERT_EXIT, but continues on to successive tests in the
+// test suite, if any:
+# define EXPECT_EXIT(statement, predicate, regex) \
+    GTEST_DEATH_TEST_(statement, predicate, regex, GTEST_NONFATAL_FAILURE_)
+
+// Asserts that a given statement causes the program to exit, either by
+// explicitly exiting with a nonzero exit code or being killed by a
+// signal, and emitting error output that matches regex.
+# define ASSERT_DEATH(statement, regex) \
+    ASSERT_EXIT(statement, ::testing::internal::ExitedUnsuccessfully, regex)
+
+// Like ASSERT_DEATH, but continues on to successive tests in the
+// test suite, if any:
+# define EXPECT_DEATH(statement, regex) \
+    EXPECT_EXIT(statement, ::testing::internal::ExitedUnsuccessfully, regex)
+
+// Two predicate classes that can be used in {ASSERT,EXPECT}_EXIT*:
+
+// Tests that an exit code describes a normal exit with a given exit code.
+class GTEST_API_ ExitedWithCode {
+ public:
+  explicit ExitedWithCode(int exit_code);
+  ExitedWithCode(const ExitedWithCode&) = default;
+  void operator=(const ExitedWithCode& other) = delete;
+  bool operator()(int exit_status) const;
+ private:
+  const int exit_code_;
+};
+
+# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
+// Tests that an exit code describes an exit due to termination by a
+// given signal.
+// GOOGLETEST_CM0006 DO NOT DELETE
+class GTEST_API_ KilledBySignal {
+ public:
+  explicit KilledBySignal(int signum);
+  bool operator()(int exit_status) const;
+ private:
+  const int signum_;
+};
+# endif  // !GTEST_OS_WINDOWS
+
+// EXPECT_DEBUG_DEATH asserts that the given statements die in debug mode.
+// The death testing framework causes this to have interesting semantics,
+// since the sideeffects of the call are only visible in opt mode, and not
+// in debug mode.
+//
+// In practice, this can be used to test functions that utilize the
+// LOG(DFATAL) macro using the following style:
+//
+// int DieInDebugOr12(int* sideeffect) {
+//   if (sideeffect) {
+//     *sideeffect = 12;
+//   }
+//   LOG(DFATAL) << "death";
+//   return 12;
+// }
+//
+// TEST(TestSuite, TestDieOr12WorksInDgbAndOpt) {
+//   int sideeffect = 0;
+//   // Only asserts in dbg.
+//   EXPECT_DEBUG_DEATH(DieInDebugOr12(&sideeffect), "death");
+//
+// #ifdef NDEBUG
+//   // opt-mode has sideeffect visible.
+//   EXPECT_EQ(12, sideeffect);
+// #else
+//   // dbg-mode no visible sideeffect.
+//   EXPECT_EQ(0, sideeffect);
+// #endif
+// }
+//
+// This will assert that DieInDebugReturn12InOpt() crashes in debug
+// mode, usually due to a DCHECK or LOG(DFATAL), but returns the
+// appropriate fallback value (12 in this case) in opt mode. If you
+// need to test that a function has appropriate side-effects in opt
+// mode, include assertions against the side-effects.  A general
+// pattern for this is:
+//
+// EXPECT_DEBUG_DEATH({
+//   // Side-effects here will have an effect after this statement in
+//   // opt mode, but none in debug mode.
+//   EXPECT_EQ(12, DieInDebugOr12(&sideeffect));
+// }, "death");
+//
+# ifdef NDEBUG
+
+#  define EXPECT_DEBUG_DEATH(statement, regex) \
+  GTEST_EXECUTE_STATEMENT_(statement, regex)
+
+#  define ASSERT_DEBUG_DEATH(statement, regex) \
+  GTEST_EXECUTE_STATEMENT_(statement, regex)
+
+# else
+
+#  define EXPECT_DEBUG_DEATH(statement, regex) \
+  EXPECT_DEATH(statement, regex)
+
+#  define ASSERT_DEBUG_DEATH(statement, regex) \
+  ASSERT_DEATH(statement, regex)
+
+# endif  // NDEBUG for EXPECT_DEBUG_DEATH
+#endif  // GTEST_HAS_DEATH_TEST
+
+// This macro is used for implementing macros such as
+// EXPECT_DEATH_IF_SUPPORTED and ASSERT_DEATH_IF_SUPPORTED on systems where
+// death tests are not supported. Those macros must compile on such systems
+// if and only if EXPECT_DEATH and ASSERT_DEATH compile with the same parameters
+// on systems that support death tests. This allows one to write such a macro on
+// a system that does not support death tests and be sure that it will compile
+// on a death-test supporting system. It is exposed publicly so that systems
+// that have death-tests with stricter requirements than GTEST_HAS_DEATH_TEST
+// can write their own equivalent of EXPECT_DEATH_IF_SUPPORTED and
+// ASSERT_DEATH_IF_SUPPORTED.
+//
+// Parameters:
+//   statement -  A statement that a macro such as EXPECT_DEATH would test
+//                for program termination. This macro has to make sure this
+//                statement is compiled but not executed, to ensure that
+//                EXPECT_DEATH_IF_SUPPORTED compiles with a certain
+//                parameter if and only if EXPECT_DEATH compiles with it.
+//   regex     -  A regex that a macro such as EXPECT_DEATH would use to test
+//                the output of statement.  This parameter has to be
+//                compiled but not evaluated by this macro, to ensure that
+//                this macro only accepts expressions that a macro such as
+//                EXPECT_DEATH would accept.
+//   terminator - Must be an empty statement for EXPECT_DEATH_IF_SUPPORTED
+//                and a return statement for ASSERT_DEATH_IF_SUPPORTED.
+//                This ensures that ASSERT_DEATH_IF_SUPPORTED will not
+//                compile inside functions where ASSERT_DEATH doesn't
+//                compile.
+//
+//  The branch that has an always false condition is used to ensure that
+//  statement and regex are compiled (and thus syntactically correct) but
+//  never executed. The unreachable code macro protects the terminator
+//  statement from generating an 'unreachable code' warning in case
+//  statement unconditionally returns or throws. The Message constructor at
+//  the end allows the syntax of streaming additional messages into the
+//  macro, for compilational compatibility with EXPECT_DEATH/ASSERT_DEATH.
+# define GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, terminator) \
+    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
+    if (::testing::internal::AlwaysTrue()) { \
+      GTEST_LOG_(WARNING) \
+          << "Death tests are not supported on this platform.\n" \
+          << "Statement '" #statement "' cannot be verified."; \
+    } else if (::testing::internal::AlwaysFalse()) { \
+      ::testing::internal::RE::PartialMatch(".*", (regex)); \
+      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
+      terminator; \
+    } else \
+      ::testing::Message()
+
+// EXPECT_DEATH_IF_SUPPORTED(statement, regex) and
+// ASSERT_DEATH_IF_SUPPORTED(statement, regex) expand to real death tests if
+// death tests are supported; otherwise they just issue a warning.  This is
+// useful when you are combining death test assertions with normal test
+// assertions in one test.
+#if GTEST_HAS_DEATH_TEST
+# define EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
+    EXPECT_DEATH(statement, regex)
+# define ASSERT_DEATH_IF_SUPPORTED(statement, regex) \
+    ASSERT_DEATH(statement, regex)
+#else
+# define EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
+    GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, )
+# define ASSERT_DEATH_IF_SUPPORTED(statement, regex) \
+    GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, return)
+#endif
+
+}  // namespace testing
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Macros and functions for implementing parameterized tests
+// in Google C++ Testing and Mocking Framework (Google Test)
+//
+// GOOGLETEST_CM0001 DO NOT DELETE
+#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
+#define GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
+
+// Value-parameterized tests allow you to test your code with different
+// parameters without writing multiple copies of the same test.
+//
+// Here is how you use value-parameterized tests:
+
+#if 0
+
+// To write value-parameterized tests, first you should define a fixture
+// class. It is usually derived from testing::TestWithParam<T> (see below for
+// another inheritance scheme that's sometimes useful in more complicated
+// class hierarchies), where the type of your parameter values.
+// TestWithParam<T> is itself derived from testing::Test. T can be any
+// copyable type. If it's a raw pointer, you are responsible for managing the
+// lifespan of the pointed values.
+
+class FooTest : public ::testing::TestWithParam<const char*> {
+  // You can implement all the usual class fixture members here.
+};
+
+// Then, use the TEST_P macro to define as many parameterized tests
+// for this fixture as you want. The _P suffix is for "parameterized"
+// or "pattern", whichever you prefer to think.
+
+TEST_P(FooTest, DoesBlah) {
+  // Inside a test, access the test parameter with the GetParam() method
+  // of the TestWithParam<T> class:
+  EXPECT_TRUE(foo.Blah(GetParam()));
+  ...
+}
+
+TEST_P(FooTest, HasBlahBlah) {
+  ...
+}
+
+// Finally, you can use INSTANTIATE_TEST_SUITE_P to instantiate the test
+// case with any set of parameters you want. Google Test defines a number
+// of functions for generating test parameters. They return what we call
+// (surprise!) parameter generators. Here is a summary of them, which
+// are all in the testing namespace:
+//
+//
+//  Range(begin, end [, step]) - Yields values {begin, begin+step,
+//                               begin+step+step, ...}. The values do not
+//                               include end. step defaults to 1.
+//  Values(v1, v2, ..., vN)    - Yields values {v1, v2, ..., vN}.
+//  ValuesIn(container)        - Yields values from a C-style array, an STL
+//  ValuesIn(begin,end)          container, or an iterator range [begin, end).
+//  Bool()                     - Yields sequence {false, true}.
+//  Combine(g1, g2, ..., gN)   - Yields all combinations (the Cartesian product
+//                               for the math savvy) of the values generated
+//                               by the N generators.
+//
+// For more details, see comments at the definitions of these functions below
+// in this file.
+//
+// The following statement will instantiate tests from the FooTest test suite
+// each with parameter values "meeny", "miny", and "moe".
+
+INSTANTIATE_TEST_SUITE_P(InstantiationName,
+                         FooTest,
+                         Values("meeny", "miny", "moe"));
+
+// To distinguish different instances of the pattern, (yes, you
+// can instantiate it more than once) the first argument to the
+// INSTANTIATE_TEST_SUITE_P macro is a prefix that will be added to the
+// actual test suite name. Remember to pick unique prefixes for different
+// instantiations. The tests from the instantiation above will have
+// these names:
+//
+//    * InstantiationName/FooTest.DoesBlah/0 for "meeny"
+//    * InstantiationName/FooTest.DoesBlah/1 for "miny"
+//    * InstantiationName/FooTest.DoesBlah/2 for "moe"
+//    * InstantiationName/FooTest.HasBlahBlah/0 for "meeny"
+//    * InstantiationName/FooTest.HasBlahBlah/1 for "miny"
+//    * InstantiationName/FooTest.HasBlahBlah/2 for "moe"
+//
+// You can use these names in --gtest_filter.
+//
+// This statement will instantiate all tests from FooTest again, each
+// with parameter values "cat" and "dog":
+
+const char* pets[] = {"cat", "dog"};
+INSTANTIATE_TEST_SUITE_P(AnotherInstantiationName, FooTest, ValuesIn(pets));
+
+// The tests from the instantiation above will have these names:
+//
+//    * AnotherInstantiationName/FooTest.DoesBlah/0 for "cat"
+//    * AnotherInstantiationName/FooTest.DoesBlah/1 for "dog"
+//    * AnotherInstantiationName/FooTest.HasBlahBlah/0 for "cat"
+//    * AnotherInstantiationName/FooTest.HasBlahBlah/1 for "dog"
+//
+// Please note that INSTANTIATE_TEST_SUITE_P will instantiate all tests
+// in the given test suite, whether their definitions come before or
+// AFTER the INSTANTIATE_TEST_SUITE_P statement.
+//
+// Please also note that generator expressions (including parameters to the
+// generators) are evaluated in InitGoogleTest(), after main() has started.
+// This allows the user on one hand, to adjust generator parameters in order
+// to dynamically determine a set of tests to run and on the other hand,
+// give the user a chance to inspect the generated tests with Google Test
+// reflection API before RUN_ALL_TESTS() is executed.
+//
+// You can see samples/sample7_unittest.cc and samples/sample8_unittest.cc
+// for more examples.
+//
+// In the future, we plan to publish the API for defining new parameter
+// generators. But for now this interface remains part of the internal
+// implementation and is subject to change.
+//
+//
+// A parameterized test fixture must be derived from testing::Test and from
+// testing::WithParamInterface<T>, where T is the type of the parameter
+// values. Inheriting from TestWithParam<T> satisfies that requirement because
+// TestWithParam<T> inherits from both Test and WithParamInterface. In more
+// complicated hierarchies, however, it is occasionally useful to inherit
+// separately from Test and WithParamInterface. For example:
+
+class BaseTest : public ::testing::Test {
+  // You can inherit all the usual members for a non-parameterized test
+  // fixture here.
+};
+
+class DerivedTest : public BaseTest, public ::testing::WithParamInterface<int> {
+  // The usual test fixture members go here too.
+};
+
+TEST_F(BaseTest, HasFoo) {
+  // This is an ordinary non-parameterized test.
+}
+
+TEST_P(DerivedTest, DoesBlah) {
+  // GetParam works just the same here as if you inherit from TestWithParam.
+  EXPECT_TRUE(foo.Blah(GetParam()));
+}
+
+#endif  // 0
+
+#include <iterator>
+#include <utility>
+
+// Copyright 2008 Google Inc.
+// All Rights Reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Type and function utilities for implementing parameterized tests.
+
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
+#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
+
+#include <ctype.h>
+
+#include <cassert>
+#include <iterator>
+#include <memory>
+#include <set>
+#include <tuple>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
+#define GOOGLETEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
+
+#include <iosfwd>
+#include <vector>
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
+/* class A needs to have dll-interface to be used by clients of class B */)
+
+namespace testing {
+
+// A copyable object representing the result of a test part (i.e. an
+// assertion or an explicit FAIL(), ADD_FAILURE(), or SUCCESS()).
+//
+// Don't inherit from TestPartResult as its destructor is not virtual.
+class GTEST_API_ TestPartResult {
+ public:
+  // The possible outcomes of a test part (i.e. an assertion or an
+  // explicit SUCCEED(), FAIL(), or ADD_FAILURE()).
+  enum Type {
+    kSuccess,          // Succeeded.
+    kNonFatalFailure,  // Failed but the test can continue.
+    kFatalFailure,     // Failed and the test should be terminated.
+    kSkip              // Skipped.
+  };
+
+  // C'tor.  TestPartResult does NOT have a default constructor.
+  // Always use this constructor (with parameters) to create a
+  // TestPartResult object.
+  TestPartResult(Type a_type, const char* a_file_name, int a_line_number,
+                 const char* a_message)
+      : type_(a_type),
+        file_name_(a_file_name == nullptr ? "" : a_file_name),
+        line_number_(a_line_number),
+        summary_(ExtractSummary(a_message)),
+        message_(a_message) {}
+
+  // Gets the outcome of the test part.
+  Type type() const { return type_; }
+
+  // Gets the name of the source file where the test part took place, or
+  // NULL if it's unknown.
+  const char* file_name() const {
+    return file_name_.empty() ? nullptr : file_name_.c_str();
+  }
+
+  // Gets the line in the source file where the test part took place,
+  // or -1 if it's unknown.
+  int line_number() const { return line_number_; }
+
+  // Gets the summary of the failure message.
+  const char* summary() const { return summary_.c_str(); }
+
+  // Gets the message associated with the test part.
+  const char* message() const { return message_.c_str(); }
+
+  // Returns true if and only if the test part was skipped.
+  bool skipped() const { return type_ == kSkip; }
+
+  // Returns true if and only if the test part passed.
+  bool passed() const { return type_ == kSuccess; }
+
+  // Returns true if and only if the test part non-fatally failed.
+  bool nonfatally_failed() const { return type_ == kNonFatalFailure; }
+
+  // Returns true if and only if the test part fatally failed.
+  bool fatally_failed() const { return type_ == kFatalFailure; }
+
+  // Returns true if and only if the test part failed.
+  bool failed() const { return fatally_failed() || nonfatally_failed(); }
+
+ private:
+  Type type_;
+
+  // Gets the summary of the failure message by omitting the stack
+  // trace in it.
+  static std::string ExtractSummary(const char* message);
+
+  // The name of the source file where the test part took place, or
+  // "" if the source file is unknown.
+  std::string file_name_;
+  // The line in the source file where the test part took place, or -1
+  // if the line number is unknown.
+  int line_number_;
+  std::string summary_;  // The test failure summary.
+  std::string message_;  // The test failure message.
+};
+
+// Prints a TestPartResult object.
+std::ostream& operator<<(std::ostream& os, const TestPartResult& result);
+
+// An array of TestPartResult objects.
+//
+// Don't inherit from TestPartResultArray as its destructor is not
+// virtual.
+class GTEST_API_ TestPartResultArray {
+ public:
+  TestPartResultArray() {}
+
+  // Appends the given TestPartResult to the array.
+  void Append(const TestPartResult& result);
+
+  // Returns the TestPartResult at the given index (0-based).
+  const TestPartResult& GetTestPartResult(int index) const;
+
+  // Returns the number of TestPartResult objects in the array.
+  int size() const;
+
+ private:
+  std::vector<TestPartResult> array_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestPartResultArray);
+};
+
+// This interface knows how to report a test part result.
+class GTEST_API_ TestPartResultReporterInterface {
+ public:
+  virtual ~TestPartResultReporterInterface() {}
+
+  virtual void ReportTestPartResult(const TestPartResult& result) = 0;
+};
+
+namespace internal {
+
+// This helper class is used by {ASSERT|EXPECT}_NO_FATAL_FAILURE to check if a
+// statement generates new fatal failures. To do so it registers itself as the
+// current test part result reporter. Besides checking if fatal failures were
+// reported, it only delegates the reporting to the former result reporter.
+// The original result reporter is restored in the destructor.
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+class GTEST_API_ HasNewFatalFailureHelper
+    : public TestPartResultReporterInterface {
+ public:
+  HasNewFatalFailureHelper();
+  ~HasNewFatalFailureHelper() override;
+  void ReportTestPartResult(const TestPartResult& result) override;
+  bool has_new_fatal_failure() const { return has_new_fatal_failure_; }
+ private:
+  bool has_new_fatal_failure_;
+  TestPartResultReporterInterface* original_reporter_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(HasNewFatalFailureHelper);
+};
+
+}  // namespace internal
+
+}  // namespace testing
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
+
+namespace testing {
+// Input to a parameterized test name generator, describing a test parameter.
+// Consists of the parameter value and the integer parameter index.
+template <class ParamType>
+struct TestParamInfo {
+  TestParamInfo(const ParamType& a_param, size_t an_index) :
+    param(a_param),
+    index(an_index) {}
+  ParamType param;
+  size_t index;
+};
+
+// A builtin parameterized test name generator which returns the result of
+// testing::PrintToString.
+struct PrintToStringParamName {
+  template <class ParamType>
+  std::string operator()(const TestParamInfo<ParamType>& info) const {
+    return PrintToString(info.param);
+  }
+};
+
+namespace internal {
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+// Utility Functions
+
+// Outputs a message explaining invalid registration of different
+// fixture class for the same test suite. This may happen when
+// TEST_P macro is used to define two tests with the same name
+// but in different namespaces.
+GTEST_API_ void ReportInvalidTestSuiteType(const char* test_suite_name,
+                                           CodeLocation code_location);
+
+template <typename> class ParamGeneratorInterface;
+template <typename> class ParamGenerator;
+
+// Interface for iterating over elements provided by an implementation
+// of ParamGeneratorInterface<T>.
+template <typename T>
+class ParamIteratorInterface {
+ public:
+  virtual ~ParamIteratorInterface() {}
+  // A pointer to the base generator instance.
+  // Used only for the purposes of iterator comparison
+  // to make sure that two iterators belong to the same generator.
+  virtual const ParamGeneratorInterface<T>* BaseGenerator() const = 0;
+  // Advances iterator to point to the next element
+  // provided by the generator. The caller is responsible
+  // for not calling Advance() on an iterator equal to
+  // BaseGenerator()->End().
+  virtual void Advance() = 0;
+  // Clones the iterator object. Used for implementing copy semantics
+  // of ParamIterator<T>.
+  virtual ParamIteratorInterface* Clone() const = 0;
+  // Dereferences the current iterator and provides (read-only) access
+  // to the pointed value. It is the caller's responsibility not to call
+  // Current() on an iterator equal to BaseGenerator()->End().
+  // Used for implementing ParamGenerator<T>::operator*().
+  virtual const T* Current() const = 0;
+  // Determines whether the given iterator and other point to the same
+  // element in the sequence generated by the generator.
+  // Used for implementing ParamGenerator<T>::operator==().
+  virtual bool Equals(const ParamIteratorInterface& other) const = 0;
+};
+
+// Class iterating over elements provided by an implementation of
+// ParamGeneratorInterface<T>. It wraps ParamIteratorInterface<T>
+// and implements the const forward iterator concept.
+template <typename T>
+class ParamIterator {
+ public:
+  typedef T value_type;
+  typedef const T& reference;
+  typedef ptrdiff_t difference_type;
+
+  // ParamIterator assumes ownership of the impl_ pointer.
+  ParamIterator(const ParamIterator& other) : impl_(other.impl_->Clone()) {}
+  ParamIterator& operator=(const ParamIterator& other) {
+    if (this != &other)
+      impl_.reset(other.impl_->Clone());
+    return *this;
+  }
+
+  const T& operator*() const { return *impl_->Current(); }
+  const T* operator->() const { return impl_->Current(); }
+  // Prefix version of operator++.
+  ParamIterator& operator++() {
+    impl_->Advance();
+    return *this;
+  }
+  // Postfix version of operator++.
+  ParamIterator operator++(int /*unused*/) {
+    ParamIteratorInterface<T>* clone = impl_->Clone();
+    impl_->Advance();
+    return ParamIterator(clone);
+  }
+  bool operator==(const ParamIterator& other) const {
+    return impl_.get() == other.impl_.get() || impl_->Equals(*other.impl_);
+  }
+  bool operator!=(const ParamIterator& other) const {
+    return !(*this == other);
+  }
+
+ private:
+  friend class ParamGenerator<T>;
+  explicit ParamIterator(ParamIteratorInterface<T>* impl) : impl_(impl) {}
+  std::unique_ptr<ParamIteratorInterface<T> > impl_;
+};
+
+// ParamGeneratorInterface<T> is the binary interface to access generators
+// defined in other translation units.
+template <typename T>
+class ParamGeneratorInterface {
+ public:
+  typedef T ParamType;
+
+  virtual ~ParamGeneratorInterface() {}
+
+  // Generator interface definition
+  virtual ParamIteratorInterface<T>* Begin() const = 0;
+  virtual ParamIteratorInterface<T>* End() const = 0;
+};
+
+// Wraps ParamGeneratorInterface<T> and provides general generator syntax
+// compatible with the STL Container concept.
+// This class implements copy initialization semantics and the contained
+// ParamGeneratorInterface<T> instance is shared among all copies
+// of the original object. This is possible because that instance is immutable.
+template<typename T>
+class ParamGenerator {
+ public:
+  typedef ParamIterator<T> iterator;
+
+  explicit ParamGenerator(ParamGeneratorInterface<T>* impl) : impl_(impl) {}
+  ParamGenerator(const ParamGenerator& other) : impl_(other.impl_) {}
+
+  ParamGenerator& operator=(const ParamGenerator& other) {
+    impl_ = other.impl_;
+    return *this;
+  }
+
+  iterator begin() const { return iterator(impl_->Begin()); }
+  iterator end() const { return iterator(impl_->End()); }
+
+ private:
+  std::shared_ptr<const ParamGeneratorInterface<T> > impl_;
+};
+
+// Generates values from a range of two comparable values. Can be used to
+// generate sequences of user-defined types that implement operator+() and
+// operator<().
+// This class is used in the Range() function.
+template <typename T, typename IncrementT>
+class RangeGenerator : public ParamGeneratorInterface<T> {
+ public:
+  RangeGenerator(T begin, T end, IncrementT step)
+      : begin_(begin), end_(end),
+        step_(step), end_index_(CalculateEndIndex(begin, end, step)) {}
+  ~RangeGenerator() override {}
+
+  ParamIteratorInterface<T>* Begin() const override {
+    return new Iterator(this, begin_, 0, step_);
+  }
+  ParamIteratorInterface<T>* End() const override {
+    return new Iterator(this, end_, end_index_, step_);
+  }
+
+ private:
+  class Iterator : public ParamIteratorInterface<T> {
+   public:
+    Iterator(const ParamGeneratorInterface<T>* base, T value, int index,
+             IncrementT step)
+        : base_(base), value_(value), index_(index), step_(step) {}
+    ~Iterator() override {}
+
+    const ParamGeneratorInterface<T>* BaseGenerator() const override {
+      return base_;
+    }
+    void Advance() override {
+      value_ = static_cast<T>(value_ + step_);
+      index_++;
+    }
+    ParamIteratorInterface<T>* Clone() const override {
+      return new Iterator(*this);
+    }
+    const T* Current() const override { return &value_; }
+    bool Equals(const ParamIteratorInterface<T>& other) const override {
+      // Having the same base generator guarantees that the other
+      // iterator is of the same type and we can downcast.
+      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
+          << "The program attempted to compare iterators "
+          << "from different generators." << std::endl;
+      const int other_index =
+          CheckedDowncastToActualType<const Iterator>(&other)->index_;
+      return index_ == other_index;
+    }
+
+   private:
+    Iterator(const Iterator& other)
+        : ParamIteratorInterface<T>(),
+          base_(other.base_), value_(other.value_), index_(other.index_),
+          step_(other.step_) {}
+
+    // No implementation - assignment is unsupported.
+    void operator=(const Iterator& other);
+
+    const ParamGeneratorInterface<T>* const base_;
+    T value_;
+    int index_;
+    const IncrementT step_;
+  };  // class RangeGenerator::Iterator
+
+  static int CalculateEndIndex(const T& begin,
+                               const T& end,
+                               const IncrementT& step) {
+    int end_index = 0;
+    for (T i = begin; i < end; i = static_cast<T>(i + step))
+      end_index++;
+    return end_index;
+  }
+
+  // No implementation - assignment is unsupported.
+  void operator=(const RangeGenerator& other);
+
+  const T begin_;
+  const T end_;
+  const IncrementT step_;
+  // The index for the end() iterator. All the elements in the generated
+  // sequence are indexed (0-based) to aid iterator comparison.
+  const int end_index_;
+};  // class RangeGenerator
+
+
+// Generates values from a pair of STL-style iterators. Used in the
+// ValuesIn() function. The elements are copied from the source range
+// since the source can be located on the stack, and the generator
+// is likely to persist beyond that stack frame.
+template <typename T>
+class ValuesInIteratorRangeGenerator : public ParamGeneratorInterface<T> {
+ public:
+  template <typename ForwardIterator>
+  ValuesInIteratorRangeGenerator(ForwardIterator begin, ForwardIterator end)
+      : container_(begin, end) {}
+  ~ValuesInIteratorRangeGenerator() override {}
+
+  ParamIteratorInterface<T>* Begin() const override {
+    return new Iterator(this, container_.begin());
+  }
+  ParamIteratorInterface<T>* End() const override {
+    return new Iterator(this, container_.end());
+  }
+
+ private:
+  typedef typename ::std::vector<T> ContainerType;
+
+  class Iterator : public ParamIteratorInterface<T> {
+   public:
+    Iterator(const ParamGeneratorInterface<T>* base,
+             typename ContainerType::const_iterator iterator)
+        : base_(base), iterator_(iterator) {}
+    ~Iterator() override {}
+
+    const ParamGeneratorInterface<T>* BaseGenerator() const override {
+      return base_;
+    }
+    void Advance() override {
+      ++iterator_;
+      value_.reset();
+    }
+    ParamIteratorInterface<T>* Clone() const override {
+      return new Iterator(*this);
+    }
+    // We need to use cached value referenced by iterator_ because *iterator_
+    // can return a temporary object (and of type other then T), so just
+    // having "return &*iterator_;" doesn't work.
+    // value_ is updated here and not in Advance() because Advance()
+    // can advance iterator_ beyond the end of the range, and we cannot
+    // detect that fact. The client code, on the other hand, is
+    // responsible for not calling Current() on an out-of-range iterator.
+    const T* Current() const override {
+      if (value_.get() == nullptr) value_.reset(new T(*iterator_));
+      return value_.get();
+    }
+    bool Equals(const ParamIteratorInterface<T>& other) const override {
+      // Having the same base generator guarantees that the other
+      // iterator is of the same type and we can downcast.
+      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
+          << "The program attempted to compare iterators "
+          << "from different generators." << std::endl;
+      return iterator_ ==
+          CheckedDowncastToActualType<const Iterator>(&other)->iterator_;
+    }
+
+   private:
+    Iterator(const Iterator& other)
+          // The explicit constructor call suppresses a false warning
+          // emitted by gcc when supplied with the -Wextra option.
+        : ParamIteratorInterface<T>(),
+          base_(other.base_),
+          iterator_(other.iterator_) {}
+
+    const ParamGeneratorInterface<T>* const base_;
+    typename ContainerType::const_iterator iterator_;
+    // A cached value of *iterator_. We keep it here to allow access by
+    // pointer in the wrapping iterator's operator->().
+    // value_ needs to be mutable to be accessed in Current().
+    // Use of std::unique_ptr helps manage cached value's lifetime,
+    // which is bound by the lifespan of the iterator itself.
+    mutable std::unique_ptr<const T> value_;
+  };  // class ValuesInIteratorRangeGenerator::Iterator
+
+  // No implementation - assignment is unsupported.
+  void operator=(const ValuesInIteratorRangeGenerator& other);
+
+  const ContainerType container_;
+};  // class ValuesInIteratorRangeGenerator
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
+// Default parameterized test name generator, returns a string containing the
+// integer test parameter index.
+template <class ParamType>
+std::string DefaultParamName(const TestParamInfo<ParamType>& info) {
+  Message name_stream;
+  name_stream << info.index;
+  return name_stream.GetString();
+}
+
+template <typename T = int>
+void TestNotEmpty() {
+  static_assert(sizeof(T) == 0, "Empty arguments are not allowed.");
+}
+template <typename T = int>
+void TestNotEmpty(const T&) {}
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
+// Stores a parameter value and later creates tests parameterized with that
+// value.
+template <class TestClass>
+class ParameterizedTestFactory : public TestFactoryBase {
+ public:
+  typedef typename TestClass::ParamType ParamType;
+  explicit ParameterizedTestFactory(ParamType parameter) :
+      parameter_(parameter) {}
+  Test* CreateTest() override {
+    TestClass::SetParam(&parameter_);
+    return new TestClass();
+  }
+
+ private:
+  const ParamType parameter_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestFactory);
+};
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
+// TestMetaFactoryBase is a base class for meta-factories that create
+// test factories for passing into MakeAndRegisterTestInfo function.
+template <class ParamType>
+class TestMetaFactoryBase {
+ public:
+  virtual ~TestMetaFactoryBase() {}
+
+  virtual TestFactoryBase* CreateTestFactory(ParamType parameter) = 0;
+};
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
+// TestMetaFactory creates test factories for passing into
+// MakeAndRegisterTestInfo function. Since MakeAndRegisterTestInfo receives
+// ownership of test factory pointer, same factory object cannot be passed
+// into that method twice. But ParameterizedTestSuiteInfo is going to call
+// it for each Test/Parameter value combination. Thus it needs meta factory
+// creator class.
+template <class TestSuite>
+class TestMetaFactory
+    : public TestMetaFactoryBase<typename TestSuite::ParamType> {
+ public:
+  using ParamType = typename TestSuite::ParamType;
+
+  TestMetaFactory() {}
+
+  TestFactoryBase* CreateTestFactory(ParamType parameter) override {
+    return new ParameterizedTestFactory<TestSuite>(parameter);
+  }
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestMetaFactory);
+};
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
+// ParameterizedTestSuiteInfoBase is a generic interface
+// to ParameterizedTestSuiteInfo classes. ParameterizedTestSuiteInfoBase
+// accumulates test information provided by TEST_P macro invocations
+// and generators provided by INSTANTIATE_TEST_SUITE_P macro invocations
+// and uses that information to register all resulting test instances
+// in RegisterTests method. The ParameterizeTestSuiteRegistry class holds
+// a collection of pointers to the ParameterizedTestSuiteInfo objects
+// and calls RegisterTests() on each of them when asked.
+class ParameterizedTestSuiteInfoBase {
+ public:
+  virtual ~ParameterizedTestSuiteInfoBase() {}
+
+  // Base part of test suite name for display purposes.
+  virtual const std::string& GetTestSuiteName() const = 0;
+  // Test suite id to verify identity.
+  virtual TypeId GetTestSuiteTypeId() const = 0;
+  // UnitTest class invokes this method to register tests in this
+  // test suite right before running them in RUN_ALL_TESTS macro.
+  // This method should not be called more than once on any single
+  // instance of a ParameterizedTestSuiteInfoBase derived class.
+  virtual void RegisterTests() = 0;
+
+ protected:
+  ParameterizedTestSuiteInfoBase() {}
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfoBase);
+};
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
+// Report a the name of a test_suit as safe to ignore
+// as the side effect of construction of this type.
+struct MarkAsIgnored {
+  explicit MarkAsIgnored(const char* test_suite);
+};
+
+GTEST_API_ void InsertSyntheticTestCase(const std::string& name,
+                                        CodeLocation location, bool has_test_p);
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
+// ParameterizedTestSuiteInfo accumulates tests obtained from TEST_P
+// macro invocations for a particular test suite and generators
+// obtained from INSTANTIATE_TEST_SUITE_P macro invocations for that
+// test suite. It registers tests with all values generated by all
+// generators when asked.
+template <class TestSuite>
+class ParameterizedTestSuiteInfo : public ParameterizedTestSuiteInfoBase {
+ public:
+  // ParamType and GeneratorCreationFunc are private types but are required
+  // for declarations of public methods AddTestPattern() and
+  // AddTestSuiteInstantiation().
+  using ParamType = typename TestSuite::ParamType;
+  // A function that returns an instance of appropriate generator type.
+  typedef ParamGenerator<ParamType>(GeneratorCreationFunc)();
+  using ParamNameGeneratorFunc = std::string(const TestParamInfo<ParamType>&);
+
+  explicit ParameterizedTestSuiteInfo(const char* name,
+                                      CodeLocation code_location)
+      : test_suite_name_(name), code_location_(code_location) {}
+
+  // Test suite base name for display purposes.
+  const std::string& GetTestSuiteName() const override {
+    return test_suite_name_;
+  }
+  // Test suite id to verify identity.
+  TypeId GetTestSuiteTypeId() const override { return GetTypeId<TestSuite>(); }
+  // TEST_P macro uses AddTestPattern() to record information
+  // about a single test in a LocalTestInfo structure.
+  // test_suite_name is the base name of the test suite (without invocation
+  // prefix). test_base_name is the name of an individual test without
+  // parameter index. For the test SequenceA/FooTest.DoBar/1 FooTest is
+  // test suite base name and DoBar is test base name.
+  void AddTestPattern(const char* test_suite_name, const char* test_base_name,
+                      TestMetaFactoryBase<ParamType>* meta_factory,
+                      CodeLocation code_location) {
+    tests_.push_back(std::shared_ptr<TestInfo>(new TestInfo(
+        test_suite_name, test_base_name, meta_factory, code_location)));
+  }
+  // INSTANTIATE_TEST_SUITE_P macro uses AddGenerator() to record information
+  // about a generator.
+  int AddTestSuiteInstantiation(const std::string& instantiation_name,
+                                GeneratorCreationFunc* func,
+                                ParamNameGeneratorFunc* name_func,
+                                const char* file, int line) {
+    instantiations_.push_back(
+        InstantiationInfo(instantiation_name, func, name_func, file, line));
+    return 0;  // Return value used only to run this method in namespace scope.
+  }
+  // UnitTest class invokes this method to register tests in this test suite
+  // right before running tests in RUN_ALL_TESTS macro.
+  // This method should not be called more than once on any single
+  // instance of a ParameterizedTestSuiteInfoBase derived class.
+  // UnitTest has a guard to prevent from calling this method more than once.
+  void RegisterTests() override {
+    bool generated_instantiations = false;
+
+    for (typename TestInfoContainer::iterator test_it = tests_.begin();
+         test_it != tests_.end(); ++test_it) {
+      std::shared_ptr<TestInfo> test_info = *test_it;
+      for (typename InstantiationContainer::iterator gen_it =
+               instantiations_.begin(); gen_it != instantiations_.end();
+               ++gen_it) {
+        const std::string& instantiation_name = gen_it->name;
+        ParamGenerator<ParamType> generator((*gen_it->generator)());
+        ParamNameGeneratorFunc* name_func = gen_it->name_func;
+        const char* file = gen_it->file;
+        int line = gen_it->line;
+
+        std::string test_suite_name;
+        if ( !instantiation_name.empty() )
+          test_suite_name = instantiation_name + "/";
+        test_suite_name += test_info->test_suite_base_name;
+
+        size_t i = 0;
+        std::set<std::string> test_param_names;
+        for (typename ParamGenerator<ParamType>::iterator param_it =
+                 generator.begin();
+             param_it != generator.end(); ++param_it, ++i) {
+          generated_instantiations = true;
+
+          Message test_name_stream;
+
+          std::string param_name = name_func(
+              TestParamInfo<ParamType>(*param_it, i));
+
+          GTEST_CHECK_(IsValidParamName(param_name))
+              << "Parameterized test name '" << param_name
+              << "' is invalid, in " << file
+              << " line " << line << std::endl;
+
+          GTEST_CHECK_(test_param_names.count(param_name) == 0)
+              << "Duplicate parameterized test name '" << param_name
+              << "', in " << file << " line " << line << std::endl;
+
+          test_param_names.insert(param_name);
+
+          if (!test_info->test_base_name.empty()) {
+            test_name_stream << test_info->test_base_name << "/";
+          }
+          test_name_stream << param_name;
+          MakeAndRegisterTestInfo(
+              test_suite_name.c_str(), test_name_stream.GetString().c_str(),
+              nullptr,  // No type parameter.
+              PrintToString(*param_it).c_str(), test_info->code_location,
+              GetTestSuiteTypeId(),
+              SuiteApiResolver<TestSuite>::GetSetUpCaseOrSuite(file, line),
+              SuiteApiResolver<TestSuite>::GetTearDownCaseOrSuite(file, line),
+              test_info->test_meta_factory->CreateTestFactory(*param_it));
+        }  // for param_it
+      }  // for gen_it
+    }  // for test_it
+
+    if (!generated_instantiations) {
+      // There are no generaotrs, or they all generate nothing ...
+      InsertSyntheticTestCase(GetTestSuiteName(), code_location_,
+                              !tests_.empty());
+    }
+  }    // RegisterTests
+
+ private:
+  // LocalTestInfo structure keeps information about a single test registered
+  // with TEST_P macro.
+  struct TestInfo {
+    TestInfo(const char* a_test_suite_base_name, const char* a_test_base_name,
+             TestMetaFactoryBase<ParamType>* a_test_meta_factory,
+             CodeLocation a_code_location)
+        : test_suite_base_name(a_test_suite_base_name),
+          test_base_name(a_test_base_name),
+          test_meta_factory(a_test_meta_factory),
+          code_location(a_code_location) {}
+
+    const std::string test_suite_base_name;
+    const std::string test_base_name;
+    const std::unique_ptr<TestMetaFactoryBase<ParamType> > test_meta_factory;
+    const CodeLocation code_location;
+  };
+  using TestInfoContainer = ::std::vector<std::shared_ptr<TestInfo> >;
+  // Records data received from INSTANTIATE_TEST_SUITE_P macros:
+  //  <Instantiation name, Sequence generator creation function,
+  //     Name generator function, Source file, Source line>
+  struct InstantiationInfo {
+      InstantiationInfo(const std::string &name_in,
+                        GeneratorCreationFunc* generator_in,
+                        ParamNameGeneratorFunc* name_func_in,
+                        const char* file_in,
+                        int line_in)
+          : name(name_in),
+            generator(generator_in),
+            name_func(name_func_in),
+            file(file_in),
+            line(line_in) {}
+
+      std::string name;
+      GeneratorCreationFunc* generator;
+      ParamNameGeneratorFunc* name_func;
+      const char* file;
+      int line;
+  };
+  typedef ::std::vector<InstantiationInfo> InstantiationContainer;
+
+  static bool IsValidParamName(const std::string& name) {
+    // Check for empty string
+    if (name.empty())
+      return false;
+
+    // Check for invalid characters
+    for (std::string::size_type index = 0; index < name.size(); ++index) {
+      if (!isalnum(name[index]) && name[index] != '_')
+        return false;
+    }
+
+    return true;
+  }
+
+  const std::string test_suite_name_;
+  CodeLocation code_location_;
+  TestInfoContainer tests_;
+  InstantiationContainer instantiations_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfo);
+};  // class ParameterizedTestSuiteInfo
+
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+template <class TestCase>
+using ParameterizedTestCaseInfo = ParameterizedTestSuiteInfo<TestCase>;
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
+// ParameterizedTestSuiteRegistry contains a map of
+// ParameterizedTestSuiteInfoBase classes accessed by test suite names. TEST_P
+// and INSTANTIATE_TEST_SUITE_P macros use it to locate their corresponding
+// ParameterizedTestSuiteInfo descriptors.
+class ParameterizedTestSuiteRegistry {
+ public:
+  ParameterizedTestSuiteRegistry() {}
+  ~ParameterizedTestSuiteRegistry() {
+    for (auto& test_suite_info : test_suite_infos_) {
+      delete test_suite_info;
+    }
+  }
+
+  // Looks up or creates and returns a structure containing information about
+  // tests and instantiations of a particular test suite.
+  template <class TestSuite>
+  ParameterizedTestSuiteInfo<TestSuite>* GetTestSuitePatternHolder(
+      const char* test_suite_name, CodeLocation code_location) {
+    ParameterizedTestSuiteInfo<TestSuite>* typed_test_info = nullptr;
+    for (auto& test_suite_info : test_suite_infos_) {
+      if (test_suite_info->GetTestSuiteName() == test_suite_name) {
+        if (test_suite_info->GetTestSuiteTypeId() != GetTypeId<TestSuite>()) {
+          // Complain about incorrect usage of Google Test facilities
+          // and terminate the program since we cannot guaranty correct
+          // test suite setup and tear-down in this case.
+          ReportInvalidTestSuiteType(test_suite_name, code_location);
+          posix::Abort();
+        } else {
+          // At this point we are sure that the object we found is of the same
+          // type we are looking for, so we downcast it to that type
+          // without further checks.
+          typed_test_info = CheckedDowncastToActualType<
+              ParameterizedTestSuiteInfo<TestSuite> >(test_suite_info);
+        }
+        break;
+      }
+    }
+    if (typed_test_info == nullptr) {
+      typed_test_info = new ParameterizedTestSuiteInfo<TestSuite>(
+          test_suite_name, code_location);
+      test_suite_infos_.push_back(typed_test_info);
+    }
+    return typed_test_info;
+  }
+  void RegisterTests() {
+    for (auto& test_suite_info : test_suite_infos_) {
+      test_suite_info->RegisterTests();
+    }
+  }
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  template <class TestCase>
+  ParameterizedTestCaseInfo<TestCase>* GetTestCasePatternHolder(
+      const char* test_case_name, CodeLocation code_location) {
+    return GetTestSuitePatternHolder<TestCase>(test_case_name, code_location);
+  }
+
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+ private:
+  using TestSuiteInfoContainer = ::std::vector<ParameterizedTestSuiteInfoBase*>;
+
+  TestSuiteInfoContainer test_suite_infos_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteRegistry);
+};
+
+// Keep track of what type-parameterized test suite are defined and
+// where as well as which are intatiated. This allows susequently
+// identifying suits that are defined but never used.
+class TypeParameterizedTestSuiteRegistry {
+ public:
+  // Add a suite definition
+  void RegisterTestSuite(const char* test_suite_name,
+                         CodeLocation code_location);
+
+  // Add an instantiation of a suit.
+  void RegisterInstantiation(const char* test_suite_name);
+
+  // For each suit repored as defined but not reported as instantiation,
+  // emit a test that reports that fact (configurably, as an error).
+  void CheckForInstantiations();
+
+ private:
+  struct TypeParameterizedTestSuiteInfo {
+    explicit TypeParameterizedTestSuiteInfo(CodeLocation c)
+        : code_location(c), instantiated(false) {}
+
+    CodeLocation code_location;
+    bool instantiated;
+  };
+
+  std::map<std::string, TypeParameterizedTestSuiteInfo> suites_;
+};
+
+}  // namespace internal
+
+// Forward declarations of ValuesIn(), which is implemented in
+// include/gtest/gtest-param-test.h.
+template <class Container>
+internal::ParamGenerator<typename Container::value_type> ValuesIn(
+    const Container& container);
+
+namespace internal {
+// Used in the Values() function to provide polymorphic capabilities.
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4100)
+#endif
+
+template <typename... Ts>
+class ValueArray {
+ public:
+  explicit ValueArray(Ts... v) : v_(FlatTupleConstructTag{}, std::move(v)...) {}
+
+  template <typename T>
+  operator ParamGenerator<T>() const {  // NOLINT
+    return ValuesIn(MakeVector<T>(MakeIndexSequence<sizeof...(Ts)>()));
+  }
+
+ private:
+  template <typename T, size_t... I>
+  std::vector<T> MakeVector(IndexSequence<I...>) const {
+    return std::vector<T>{static_cast<T>(v_.template Get<I>())...};
+  }
+
+  FlatTuple<Ts...> v_;
+};
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+template <typename... T>
+class CartesianProductGenerator
+    : public ParamGeneratorInterface<::std::tuple<T...>> {
+ public:
+  typedef ::std::tuple<T...> ParamType;
+
+  CartesianProductGenerator(const std::tuple<ParamGenerator<T>...>& g)
+      : generators_(g) {}
+  ~CartesianProductGenerator() override {}
+
+  ParamIteratorInterface<ParamType>* Begin() const override {
+    return new Iterator(this, generators_, false);
+  }
+  ParamIteratorInterface<ParamType>* End() const override {
+    return new Iterator(this, generators_, true);
+  }
+
+ private:
+  template <class I>
+  class IteratorImpl;
+  template <size_t... I>
+  class IteratorImpl<IndexSequence<I...>>
+      : public ParamIteratorInterface<ParamType> {
+   public:
+    IteratorImpl(const ParamGeneratorInterface<ParamType>* base,
+             const std::tuple<ParamGenerator<T>...>& generators, bool is_end)
+        : base_(base),
+          begin_(std::get<I>(generators).begin()...),
+          end_(std::get<I>(generators).end()...),
+          current_(is_end ? end_ : begin_) {
+      ComputeCurrentValue();
+    }
+    ~IteratorImpl() override {}
+
+    const ParamGeneratorInterface<ParamType>* BaseGenerator() const override {
+      return base_;
+    }
+    // Advance should not be called on beyond-of-range iterators
+    // so no component iterators must be beyond end of range, either.
+    void Advance() override {
+      assert(!AtEnd());
+      // Advance the last iterator.
+      ++std::get<sizeof...(T) - 1>(current_);
+      // if that reaches end, propagate that up.
+      AdvanceIfEnd<sizeof...(T) - 1>();
+      ComputeCurrentValue();
+    }
+    ParamIteratorInterface<ParamType>* Clone() const override {
+      return new IteratorImpl(*this);
+    }
+
+    const ParamType* Current() const override { return current_value_.get(); }
+
+    bool Equals(const ParamIteratorInterface<ParamType>& other) const override {
+      // Having the same base generator guarantees that the other
+      // iterator is of the same type and we can downcast.
+      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
+          << "The program attempted to compare iterators "
+          << "from different generators." << std::endl;
+      const IteratorImpl* typed_other =
+          CheckedDowncastToActualType<const IteratorImpl>(&other);
+
+      // We must report iterators equal if they both point beyond their
+      // respective ranges. That can happen in a variety of fashions,
+      // so we have to consult AtEnd().
+      if (AtEnd() && typed_other->AtEnd()) return true;
+
+      bool same = true;
+      bool dummy[] = {
+          (same = same && std::get<I>(current_) ==
+                              std::get<I>(typed_other->current_))...};
+      (void)dummy;
+      return same;
+    }
+
+   private:
+    template <size_t ThisI>
+    void AdvanceIfEnd() {
+      if (std::get<ThisI>(current_) != std::get<ThisI>(end_)) return;
+
+      bool last = ThisI == 0;
+      if (last) {
+        // We are done. Nothing else to propagate.
+        return;
+      }
+
+      constexpr size_t NextI = ThisI - (ThisI != 0);
+      std::get<ThisI>(current_) = std::get<ThisI>(begin_);
+      ++std::get<NextI>(current_);
+      AdvanceIfEnd<NextI>();
+    }
+
+    void ComputeCurrentValue() {
+      if (!AtEnd())
+        current_value_ = std::make_shared<ParamType>(*std::get<I>(current_)...);
+    }
+    bool AtEnd() const {
+      bool at_end = false;
+      bool dummy[] = {
+          (at_end = at_end || std::get<I>(current_) == std::get<I>(end_))...};
+      (void)dummy;
+      return at_end;
+    }
+
+    const ParamGeneratorInterface<ParamType>* const base_;
+    std::tuple<typename ParamGenerator<T>::iterator...> begin_;
+    std::tuple<typename ParamGenerator<T>::iterator...> end_;
+    std::tuple<typename ParamGenerator<T>::iterator...> current_;
+    std::shared_ptr<ParamType> current_value_;
+  };
+
+  using Iterator = IteratorImpl<typename MakeIndexSequence<sizeof...(T)>::type>;
+
+  std::tuple<ParamGenerator<T>...> generators_;
+};
+
+template <class... Gen>
+class CartesianProductHolder {
+ public:
+  CartesianProductHolder(const Gen&... g) : generators_(g...) {}
+  template <typename... T>
+  operator ParamGenerator<::std::tuple<T...>>() const {
+    return ParamGenerator<::std::tuple<T...>>(
+        new CartesianProductGenerator<T...>(generators_));
+  }
+
+ private:
+  std::tuple<Gen...> generators_;
+};
+
+}  // namespace internal
+}  // namespace testing
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
+
+namespace testing {
+
+// Functions producing parameter generators.
+//
+// Google Test uses these generators to produce parameters for value-
+// parameterized tests. When a parameterized test suite is instantiated
+// with a particular generator, Google Test creates and runs tests
+// for each element in the sequence produced by the generator.
+//
+// In the following sample, tests from test suite FooTest are instantiated
+// each three times with parameter values 3, 5, and 8:
+//
+// class FooTest : public TestWithParam<int> { ... };
+//
+// TEST_P(FooTest, TestThis) {
+// }
+// TEST_P(FooTest, TestThat) {
+// }
+// INSTANTIATE_TEST_SUITE_P(TestSequence, FooTest, Values(3, 5, 8));
+//
+
+// Range() returns generators providing sequences of values in a range.
+//
+// Synopsis:
+// Range(start, end)
+//   - returns a generator producing a sequence of values {start, start+1,
+//     start+2, ..., }.
+// Range(start, end, step)
+//   - returns a generator producing a sequence of values {start, start+step,
+//     start+step+step, ..., }.
+// Notes:
+//   * The generated sequences never include end. For example, Range(1, 5)
+//     returns a generator producing a sequence {1, 2, 3, 4}. Range(1, 9, 2)
+//     returns a generator producing {1, 3, 5, 7}.
+//   * start and end must have the same type. That type may be any integral or
+//     floating-point type or a user defined type satisfying these conditions:
+//     * It must be assignable (have operator=() defined).
+//     * It must have operator+() (operator+(int-compatible type) for
+//       two-operand version).
+//     * It must have operator<() defined.
+//     Elements in the resulting sequences will also have that type.
+//   * Condition start < end must be satisfied in order for resulting sequences
+//     to contain any elements.
+//
+template <typename T, typename IncrementT>
+internal::ParamGenerator<T> Range(T start, T end, IncrementT step) {
+  return internal::ParamGenerator<T>(
+      new internal::RangeGenerator<T, IncrementT>(start, end, step));
+}
+
+template <typename T>
+internal::ParamGenerator<T> Range(T start, T end) {
+  return Range(start, end, 1);
+}
+
+// ValuesIn() function allows generation of tests with parameters coming from
+// a container.
+//
+// Synopsis:
+// ValuesIn(const T (&array)[N])
+//   - returns a generator producing sequences with elements from
+//     a C-style array.
+// ValuesIn(const Container& container)
+//   - returns a generator producing sequences with elements from
+//     an STL-style container.
+// ValuesIn(Iterator begin, Iterator end)
+//   - returns a generator producing sequences with elements from
+//     a range [begin, end) defined by a pair of STL-style iterators. These
+//     iterators can also be plain C pointers.
+//
+// Please note that ValuesIn copies the values from the containers
+// passed in and keeps them to generate tests in RUN_ALL_TESTS().
+//
+// Examples:
+//
+// This instantiates tests from test suite StringTest
+// each with C-string values of "foo", "bar", and "baz":
+//
+// const char* strings[] = {"foo", "bar", "baz"};
+// INSTANTIATE_TEST_SUITE_P(StringSequence, StringTest, ValuesIn(strings));
+//
+// This instantiates tests from test suite StlStringTest
+// each with STL strings with values "a" and "b":
+//
+// ::std::vector< ::std::string> GetParameterStrings() {
+//   ::std::vector< ::std::string> v;
+//   v.push_back("a");
+//   v.push_back("b");
+//   return v;
+// }
+//
+// INSTANTIATE_TEST_SUITE_P(CharSequence,
+//                          StlStringTest,
+//                          ValuesIn(GetParameterStrings()));
+//
+//
+// This will also instantiate tests from CharTest
+// each with parameter values 'a' and 'b':
+//
+// ::std::list<char> GetParameterChars() {
+//   ::std::list<char> list;
+//   list.push_back('a');
+//   list.push_back('b');
+//   return list;
+// }
+// ::std::list<char> l = GetParameterChars();
+// INSTANTIATE_TEST_SUITE_P(CharSequence2,
+//                          CharTest,
+//                          ValuesIn(l.begin(), l.end()));
+//
+template <typename ForwardIterator>
+internal::ParamGenerator<
+    typename std::iterator_traits<ForwardIterator>::value_type>
+ValuesIn(ForwardIterator begin, ForwardIterator end) {
+  typedef typename std::iterator_traits<ForwardIterator>::value_type ParamType;
+  return internal::ParamGenerator<ParamType>(
+      new internal::ValuesInIteratorRangeGenerator<ParamType>(begin, end));
+}
+
+template <typename T, size_t N>
+internal::ParamGenerator<T> ValuesIn(const T (&array)[N]) {
+  return ValuesIn(array, array + N);
+}
+
+template <class Container>
+internal::ParamGenerator<typename Container::value_type> ValuesIn(
+    const Container& container) {
+  return ValuesIn(container.begin(), container.end());
+}
+
+// Values() allows generating tests from explicitly specified list of
+// parameters.
+//
+// Synopsis:
+// Values(T v1, T v2, ..., T vN)
+//   - returns a generator producing sequences with elements v1, v2, ..., vN.
+//
+// For example, this instantiates tests from test suite BarTest each
+// with values "one", "two", and "three":
+//
+// INSTANTIATE_TEST_SUITE_P(NumSequence,
+//                          BarTest,
+//                          Values("one", "two", "three"));
+//
+// This instantiates tests from test suite BazTest each with values 1, 2, 3.5.
+// The exact type of values will depend on the type of parameter in BazTest.
+//
+// INSTANTIATE_TEST_SUITE_P(FloatingNumbers, BazTest, Values(1, 2, 3.5));
+//
+//
+template <typename... T>
+internal::ValueArray<T...> Values(T... v) {
+  return internal::ValueArray<T...>(std::move(v)...);
+}
+
+// Bool() allows generating tests with parameters in a set of (false, true).
+//
+// Synopsis:
+// Bool()
+//   - returns a generator producing sequences with elements {false, true}.
+//
+// It is useful when testing code that depends on Boolean flags. Combinations
+// of multiple flags can be tested when several Bool()'s are combined using
+// Combine() function.
+//
+// In the following example all tests in the test suite FlagDependentTest
+// will be instantiated twice with parameters false and true.
+//
+// class FlagDependentTest : public testing::TestWithParam<bool> {
+//   virtual void SetUp() {
+//     external_flag = GetParam();
+//   }
+// }
+// INSTANTIATE_TEST_SUITE_P(BoolSequence, FlagDependentTest, Bool());
+//
+inline internal::ParamGenerator<bool> Bool() {
+  return Values(false, true);
+}
+
+// Combine() allows the user to combine two or more sequences to produce
+// values of a Cartesian product of those sequences' elements.
+//
+// Synopsis:
+// Combine(gen1, gen2, ..., genN)
+//   - returns a generator producing sequences with elements coming from
+//     the Cartesian product of elements from the sequences generated by
+//     gen1, gen2, ..., genN. The sequence elements will have a type of
+//     std::tuple<T1, T2, ..., TN> where T1, T2, ..., TN are the types
+//     of elements from sequences produces by gen1, gen2, ..., genN.
+//
+// Example:
+//
+// This will instantiate tests in test suite AnimalTest each one with
+// the parameter values tuple("cat", BLACK), tuple("cat", WHITE),
+// tuple("dog", BLACK), and tuple("dog", WHITE):
+//
+// enum Color { BLACK, GRAY, WHITE };
+// class AnimalTest
+//     : public testing::TestWithParam<std::tuple<const char*, Color> > {...};
+//
+// TEST_P(AnimalTest, AnimalLooksNice) {...}
+//
+// INSTANTIATE_TEST_SUITE_P(AnimalVariations, AnimalTest,
+//                          Combine(Values("cat", "dog"),
+//                                  Values(BLACK, WHITE)));
+//
+// This will instantiate tests in FlagDependentTest with all variations of two
+// Boolean flags:
+//
+// class FlagDependentTest
+//     : public testing::TestWithParam<std::tuple<bool, bool> > {
+//   virtual void SetUp() {
+//     // Assigns external_flag_1 and external_flag_2 values from the tuple.
+//     std::tie(external_flag_1, external_flag_2) = GetParam();
+//   }
+// };
+//
+// TEST_P(FlagDependentTest, TestFeature1) {
+//   // Test your code using external_flag_1 and external_flag_2 here.
+// }
+// INSTANTIATE_TEST_SUITE_P(TwoBoolSequence, FlagDependentTest,
+//                          Combine(Bool(), Bool()));
+//
+template <typename... Generator>
+internal::CartesianProductHolder<Generator...> Combine(const Generator&... g) {
+  return internal::CartesianProductHolder<Generator...>(g...);
+}
+
+#define TEST_P(test_suite_name, test_name)                                     \
+  class GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)                     \
+      : public test_suite_name {                                               \
+   public:                                                                     \
+    GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() {}                    \
+    void TestBody() override;                                                  \
+                                                                               \
+   private:                                                                    \
+    static int AddToRegistry() {                                               \
+      ::testing::UnitTest::GetInstance()                                       \
+          ->parameterized_test_registry()                                      \
+          .GetTestSuitePatternHolder<test_suite_name>(                         \
+              GTEST_STRINGIFY_(test_suite_name),                               \
+              ::testing::internal::CodeLocation(__FILE__, __LINE__))           \
+          ->AddTestPattern(                                                    \
+              GTEST_STRINGIFY_(test_suite_name), GTEST_STRINGIFY_(test_name),  \
+              new ::testing::internal::TestMetaFactory<GTEST_TEST_CLASS_NAME_( \
+                  test_suite_name, test_name)>(),                              \
+              ::testing::internal::CodeLocation(__FILE__, __LINE__));          \
+      return 0;                                                                \
+    }                                                                          \
+    static int gtest_registering_dummy_ GTEST_ATTRIBUTE_UNUSED_;               \
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name,    \
+                                                           test_name));        \
+  };                                                                           \
+  int GTEST_TEST_CLASS_NAME_(test_suite_name,                                  \
+                             test_name)::gtest_registering_dummy_ =            \
+      GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::AddToRegistry();     \
+  void GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::TestBody()
+
+// The last argument to INSTANTIATE_TEST_SUITE_P allows the user to specify
+// generator and an optional function or functor that generates custom test name
+// suffixes based on the test parameters. Such a function or functor should
+// accept one argument of type testing::TestParamInfo<class ParamType>, and
+// return std::string.
+//
+// testing::PrintToStringParamName is a builtin test suffix generator that
+// returns the value of testing::PrintToString(GetParam()).
+//
+// Note: test names must be non-empty, unique, and may only contain ASCII
+// alphanumeric characters or underscore. Because PrintToString adds quotes
+// to std::string and C strings, it won't work for these types.
+
+#define GTEST_EXPAND_(arg) arg
+#define GTEST_GET_FIRST_(first, ...) first
+#define GTEST_GET_SECOND_(first, second, ...) second
+
+#define INSTANTIATE_TEST_SUITE_P(prefix, test_suite_name, ...)                \
+  static ::testing::internal::ParamGenerator<test_suite_name::ParamType>      \
+      gtest_##prefix##test_suite_name##_EvalGenerator_() {                    \
+    return GTEST_EXPAND_(GTEST_GET_FIRST_(__VA_ARGS__, DUMMY_PARAM_));        \
+  }                                                                           \
+  static ::std::string gtest_##prefix##test_suite_name##_EvalGenerateName_(   \
+      const ::testing::TestParamInfo<test_suite_name::ParamType>& info) {     \
+    if (::testing::internal::AlwaysFalse()) {                                 \
+      ::testing::internal::TestNotEmpty(GTEST_EXPAND_(GTEST_GET_SECOND_(      \
+          __VA_ARGS__,                                                        \
+          ::testing::internal::DefaultParamName<test_suite_name::ParamType>,  \
+          DUMMY_PARAM_)));                                                    \
+      auto t = std::make_tuple(__VA_ARGS__);                                  \
+      static_assert(std::tuple_size<decltype(t)>::value <= 2,                 \
+                    "Too Many Args!");                                        \
+    }                                                                         \
+    return ((GTEST_EXPAND_(GTEST_GET_SECOND_(                                 \
+        __VA_ARGS__,                                                          \
+        ::testing::internal::DefaultParamName<test_suite_name::ParamType>,    \
+        DUMMY_PARAM_))))(info);                                               \
+  }                                                                           \
+  static int gtest_##prefix##test_suite_name##_dummy_                         \
+      GTEST_ATTRIBUTE_UNUSED_ =                                               \
+          ::testing::UnitTest::GetInstance()                                  \
+              ->parameterized_test_registry()                                 \
+              .GetTestSuitePatternHolder<test_suite_name>(                    \
+                  GTEST_STRINGIFY_(test_suite_name),                          \
+                  ::testing::internal::CodeLocation(__FILE__, __LINE__))      \
+              ->AddTestSuiteInstantiation(                                    \
+                  GTEST_STRINGIFY_(prefix),                                   \
+                  &gtest_##prefix##test_suite_name##_EvalGenerator_,          \
+                  &gtest_##prefix##test_suite_name##_EvalGenerateName_,       \
+                  __FILE__, __LINE__)
+
+
+// Allow Marking a Parameterized test class as not needing to be instantiated.
+#define GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(T)                   \
+  namespace gtest_do_not_use_outside_namespace_scope {}                   \
+  static const ::testing::internal::MarkAsIgnored gtest_allow_ignore_##T( \
+      GTEST_STRINGIFY_(T))
+
+// Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+#define INSTANTIATE_TEST_CASE_P                                            \
+  static_assert(::testing::internal::InstantiateTestCase_P_IsDeprecated(), \
+                "");                                                       \
+  INSTANTIATE_TEST_SUITE_P
+#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+}  // namespace testing
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
+// Copyright 2006, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//
+// Google C++ Testing and Mocking Framework definitions useful in production code.
+// GOOGLETEST_CM0003 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PROD_H_
+#define GOOGLETEST_INCLUDE_GTEST_GTEST_PROD_H_
+
+// When you need to test the private or protected members of a class,
+// use the FRIEND_TEST macro to declare your tests as friends of the
+// class.  For example:
+//
+// class MyClass {
+//  private:
+//   void PrivateMethod();
+//   FRIEND_TEST(MyClassTest, PrivateMethodWorks);
+// };
+//
+// class MyClassTest : public testing::Test {
+//   // ...
+// };
+//
+// TEST_F(MyClassTest, PrivateMethodWorks) {
+//   // Can call MyClass::PrivateMethod() here.
+// }
+//
+// Note: The test class must be in the same namespace as the class being tested.
+// For example, putting MyClassTest in an anonymous namespace will not work.
+
+#define FRIEND_TEST(test_case_name, test_name)\
+friend class test_case_name##_##test_name##_Test
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PROD_H_
+// Copyright 2008 Google Inc.
+// All Rights Reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
+#define GOOGLETEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
+
+// This header implements typed tests and type-parameterized tests.
+
+// Typed (aka type-driven) tests repeat the same test for types in a
+// list.  You must know which types you want to test with when writing
+// typed tests. Here's how you do it:
+
+#if 0
+
+// First, define a fixture class template.  It should be parameterized
+// by a type.  Remember to derive it from testing::Test.
+template <typename T>
+class FooTest : public testing::Test {
+ public:
+  ...
+  typedef std::list<T> List;
+  static T shared_;
+  T value_;
+};
+
+// Next, associate a list of types with the test suite, which will be
+// repeated for each type in the list.  The typedef is necessary for
+// the macro to parse correctly.
+typedef testing::Types<char, int, unsigned int> MyTypes;
+TYPED_TEST_SUITE(FooTest, MyTypes);
+
+// If the type list contains only one type, you can write that type
+// directly without Types<...>:
+//   TYPED_TEST_SUITE(FooTest, int);
+
+// Then, use TYPED_TEST() instead of TEST_F() to define as many typed
+// tests for this test suite as you want.
+TYPED_TEST(FooTest, DoesBlah) {
+  // Inside a test, refer to the special name TypeParam to get the type
+  // parameter.  Since we are inside a derived class template, C++ requires
+  // us to visit the members of FooTest via 'this'.
+  TypeParam n = this->value_;
+
+  // To visit static members of the fixture, add the TestFixture::
+  // prefix.
+  n += TestFixture::shared_;
+
+  // To refer to typedefs in the fixture, add the "typename
+  // TestFixture::" prefix.
+  typename TestFixture::List values;
+  values.push_back(n);
+  ...
+}
+
+TYPED_TEST(FooTest, HasPropertyA) { ... }
+
+// TYPED_TEST_SUITE takes an optional third argument which allows to specify a
+// class that generates custom test name suffixes based on the type. This should
+// be a class which has a static template function GetName(int index) returning
+// a string for each type. The provided integer index equals the index of the
+// type in the provided type list. In many cases the index can be ignored.
+//
+// For example:
+//   class MyTypeNames {
+//    public:
+//     template <typename T>
+//     static std::string GetName(int) {
+//       if (std::is_same<T, char>()) return "char";
+//       if (std::is_same<T, int>()) return "int";
+//       if (std::is_same<T, unsigned int>()) return "unsignedInt";
+//     }
+//   };
+//   TYPED_TEST_SUITE(FooTest, MyTypes, MyTypeNames);
+
+#endif  // 0
+
+// Type-parameterized tests are abstract test patterns parameterized
+// by a type.  Compared with typed tests, type-parameterized tests
+// allow you to define the test pattern without knowing what the type
+// parameters are.  The defined pattern can be instantiated with
+// different types any number of times, in any number of translation
+// units.
+//
+// If you are designing an interface or concept, you can define a
+// suite of type-parameterized tests to verify properties that any
+// valid implementation of the interface/concept should have.  Then,
+// each implementation can easily instantiate the test suite to verify
+// that it conforms to the requirements, without having to write
+// similar tests repeatedly.  Here's an example:
+
+#if 0
+
+// First, define a fixture class template.  It should be parameterized
+// by a type.  Remember to derive it from testing::Test.
+template <typename T>
+class FooTest : public testing::Test {
+  ...
+};
+
+// Next, declare that you will define a type-parameterized test suite
+// (the _P suffix is for "parameterized" or "pattern", whichever you
+// prefer):
+TYPED_TEST_SUITE_P(FooTest);
+
+// Then, use TYPED_TEST_P() to define as many type-parameterized tests
+// for this type-parameterized test suite as you want.
+TYPED_TEST_P(FooTest, DoesBlah) {
+  // Inside a test, refer to TypeParam to get the type parameter.
+  TypeParam n = 0;
+  ...
+}
+
+TYPED_TEST_P(FooTest, HasPropertyA) { ... }
+
+// Now the tricky part: you need to register all test patterns before
+// you can instantiate them.  The first argument of the macro is the
+// test suite name; the rest are the names of the tests in this test
+// case.
+REGISTER_TYPED_TEST_SUITE_P(FooTest,
+                            DoesBlah, HasPropertyA);
+
+// Finally, you are free to instantiate the pattern with the types you
+// want.  If you put the above code in a header file, you can #include
+// it in multiple C++ source files and instantiate it multiple times.
+//
+// To distinguish different instances of the pattern, the first
+// argument to the INSTANTIATE_* macro is a prefix that will be added
+// to the actual test suite name.  Remember to pick unique prefixes for
+// different instances.
+typedef testing::Types<char, int, unsigned int> MyTypes;
+INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes);
+
+// If the type list contains only one type, you can write that type
+// directly without Types<...>:
+//   INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, int);
+//
+// Similar to the optional argument of TYPED_TEST_SUITE above,
+// INSTANTIATE_TEST_SUITE_P takes an optional fourth argument which allows to
+// generate custom names.
+//   INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes, MyTypeNames);
+
+#endif  // 0
+
+
+// Implements typed tests.
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
+// Expands to the name of the typedef for the type parameters of the
+// given test suite.
+#define GTEST_TYPE_PARAMS_(TestSuiteName) gtest_type_params_##TestSuiteName##_
+
+// Expands to the name of the typedef for the NameGenerator, responsible for
+// creating the suffixes of the name.
+#define GTEST_NAME_GENERATOR_(TestSuiteName) \
+  gtest_type_params_##TestSuiteName##_NameGenerator
+
+#define TYPED_TEST_SUITE(CaseName, Types, ...)                          \
+  typedef ::testing::internal::GenerateTypeList<Types>::type            \
+      GTEST_TYPE_PARAMS_(CaseName);                                     \
+  typedef ::testing::internal::NameGeneratorSelector<__VA_ARGS__>::type \
+      GTEST_NAME_GENERATOR_(CaseName)
+
+#define TYPED_TEST(CaseName, TestName)                                        \
+  static_assert(sizeof(GTEST_STRINGIFY_(TestName)) > 1,                       \
+                "test-name must not be empty");                               \
+  template <typename gtest_TypeParam_>                                        \
+  class GTEST_TEST_CLASS_NAME_(CaseName, TestName)                            \
+      : public CaseName<gtest_TypeParam_> {                                   \
+   private:                                                                   \
+    typedef CaseName<gtest_TypeParam_> TestFixture;                           \
+    typedef gtest_TypeParam_ TypeParam;                                       \
+    void TestBody() override;                                                 \
+  };                                                                          \
+  static bool gtest_##CaseName##_##TestName##_registered_                     \
+      GTEST_ATTRIBUTE_UNUSED_ = ::testing::internal::TypeParameterizedTest<   \
+          CaseName,                                                           \
+          ::testing::internal::TemplateSel<GTEST_TEST_CLASS_NAME_(CaseName,   \
+                                                                  TestName)>, \
+          GTEST_TYPE_PARAMS_(                                                 \
+              CaseName)>::Register("",                                        \
+                                   ::testing::internal::CodeLocation(         \
+                                       __FILE__, __LINE__),                   \
+                                   GTEST_STRINGIFY_(CaseName),                \
+                                   GTEST_STRINGIFY_(TestName), 0,             \
+                                   ::testing::internal::GenerateNames<        \
+                                       GTEST_NAME_GENERATOR_(CaseName),       \
+                                       GTEST_TYPE_PARAMS_(CaseName)>());      \
+  template <typename gtest_TypeParam_>                                        \
+  void GTEST_TEST_CLASS_NAME_(CaseName,                                       \
+                              TestName)<gtest_TypeParam_>::TestBody()
+
+// Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+#define TYPED_TEST_CASE                                                \
+  static_assert(::testing::internal::TypedTestCaseIsDeprecated(), ""); \
+  TYPED_TEST_SUITE
+#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+// Implements type-parameterized tests.
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
+// Expands to the namespace name that the type-parameterized tests for
+// the given type-parameterized test suite are defined in.  The exact
+// name of the namespace is subject to change without notice.
+#define GTEST_SUITE_NAMESPACE_(TestSuiteName) gtest_suite_##TestSuiteName##_
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+//
+// Expands to the name of the variable used to remember the names of
+// the defined tests in the given test suite.
+#define GTEST_TYPED_TEST_SUITE_P_STATE_(TestSuiteName) \
+  gtest_typed_test_suite_p_state_##TestSuiteName##_
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE DIRECTLY.
+//
+// Expands to the name of the variable used to remember the names of
+// the registered tests in the given test suite.
+#define GTEST_REGISTERED_TEST_NAMES_(TestSuiteName) \
+  gtest_registered_test_names_##TestSuiteName##_
+
+// The variables defined in the type-parameterized test macros are
+// static as typically these macros are used in a .h file that can be
+// #included in multiple translation units linked together.
+#define TYPED_TEST_SUITE_P(SuiteName)              \
+  static ::testing::internal::TypedTestSuitePState \
+      GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName)
+
+// Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+#define TYPED_TEST_CASE_P                                                 \
+  static_assert(::testing::internal::TypedTestCase_P_IsDeprecated(), ""); \
+  TYPED_TEST_SUITE_P
+#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+#define TYPED_TEST_P(SuiteName, TestName)                             \
+  namespace GTEST_SUITE_NAMESPACE_(SuiteName) {                       \
+    template <typename gtest_TypeParam_>                              \
+    class TestName : public SuiteName<gtest_TypeParam_> {             \
+     private:                                                         \
+      typedef SuiteName<gtest_TypeParam_> TestFixture;                \
+      typedef gtest_TypeParam_ TypeParam;                             \
+      void TestBody() override;                                       \
+    };                                                                \
+    static bool gtest_##TestName##_defined_ GTEST_ATTRIBUTE_UNUSED_ = \
+        GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName).AddTestName(       \
+            __FILE__, __LINE__, GTEST_STRINGIFY_(SuiteName),          \
+            GTEST_STRINGIFY_(TestName));                              \
+  }                                                                   \
+  template <typename gtest_TypeParam_>                                \
+  void GTEST_SUITE_NAMESPACE_(                                        \
+      SuiteName)::TestName<gtest_TypeParam_>::TestBody()
+
+// Note: this won't work correctly if the trailing arguments are macros.
+#define REGISTER_TYPED_TEST_SUITE_P(SuiteName, ...)                         \
+  namespace GTEST_SUITE_NAMESPACE_(SuiteName) {                             \
+    typedef ::testing::internal::Templates<__VA_ARGS__> gtest_AllTests_;    \
+  }                                                                         \
+  static const char* const GTEST_REGISTERED_TEST_NAMES_(                    \
+      SuiteName) GTEST_ATTRIBUTE_UNUSED_ =                                  \
+      GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName).VerifyRegisteredTestNames( \
+          GTEST_STRINGIFY_(SuiteName), __FILE__, __LINE__, #__VA_ARGS__)
+
+// Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+#define REGISTER_TYPED_TEST_CASE_P                                           \
+  static_assert(::testing::internal::RegisterTypedTestCase_P_IsDeprecated(), \
+                "");                                                         \
+  REGISTER_TYPED_TEST_SUITE_P
+#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+#define INSTANTIATE_TYPED_TEST_SUITE_P(Prefix, SuiteName, Types, ...)       \
+  static_assert(sizeof(GTEST_STRINGIFY_(Prefix)) > 1,                       \
+                "test-suit-prefix must not be empty");                      \
+  static bool gtest_##Prefix##_##SuiteName GTEST_ATTRIBUTE_UNUSED_ =        \
+      ::testing::internal::TypeParameterizedTestSuite<                      \
+          SuiteName, GTEST_SUITE_NAMESPACE_(SuiteName)::gtest_AllTests_,    \
+          ::testing::internal::GenerateTypeList<Types>::type>::             \
+          Register(GTEST_STRINGIFY_(Prefix),                                \
+                   ::testing::internal::CodeLocation(__FILE__, __LINE__),   \
+                   &GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName),             \
+                   GTEST_STRINGIFY_(SuiteName),                             \
+                   GTEST_REGISTERED_TEST_NAMES_(SuiteName),                 \
+                   ::testing::internal::GenerateNames<                      \
+                       ::testing::internal::NameGeneratorSelector<          \
+                           __VA_ARGS__>::type,                              \
+                       ::testing::internal::GenerateTypeList<Types>::type>())
+
+// Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+#define INSTANTIATE_TYPED_TEST_CASE_P                                      \
+  static_assert(                                                           \
+      ::testing::internal::InstantiateTypedTestCase_P_IsDeprecated(), ""); \
+  INSTANTIATE_TYPED_TEST_SUITE_P
+#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
+
+GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
+/* class A needs to have dll-interface to be used by clients of class B */)
+
+namespace testing {
+
+// Silence C4100 (unreferenced formal parameter) and 4805
+// unsafe mix of type 'const int' and type 'const bool'
+#ifdef _MSC_VER
+# pragma warning(push)
+# pragma warning(disable:4805)
+# pragma warning(disable:4100)
+#endif
+
+
+// Declares the flags.
+
+// This flag temporary enables the disabled tests.
+GTEST_DECLARE_bool_(also_run_disabled_tests);
+
+// This flag brings the debugger on an assertion failure.
+GTEST_DECLARE_bool_(break_on_failure);
+
+// This flag controls whether Google Test catches all test-thrown exceptions
+// and logs them as failures.
+GTEST_DECLARE_bool_(catch_exceptions);
+
+// This flag enables using colors in terminal output. Available values are
+// "yes" to enable colors, "no" (disable colors), or "auto" (the default)
+// to let Google Test decide.
+GTEST_DECLARE_string_(color);
+
+// This flag controls whether the test runner should continue execution past
+// first failure.
+GTEST_DECLARE_bool_(fail_fast);
+
+// This flag sets up the filter to select by name using a glob pattern
+// the tests to run. If the filter is not given all tests are executed.
+GTEST_DECLARE_string_(filter);
+
+// This flag controls whether Google Test installs a signal handler that dumps
+// debugging information when fatal signals are raised.
+GTEST_DECLARE_bool_(install_failure_signal_handler);
+
+// This flag causes the Google Test to list tests. None of the tests listed
+// are actually run if the flag is provided.
+GTEST_DECLARE_bool_(list_tests);
+
+// This flag controls whether Google Test emits a detailed XML report to a file
+// in addition to its normal textual output.
+GTEST_DECLARE_string_(output);
+
+// This flags control whether Google Test prints only test failures.
+GTEST_DECLARE_bool_(brief);
+
+// This flags control whether Google Test prints the elapsed time for each
+// test.
+GTEST_DECLARE_bool_(print_time);
+
+// This flags control whether Google Test prints UTF8 characters as text.
+GTEST_DECLARE_bool_(print_utf8);
+
+// This flag specifies the random number seed.
+GTEST_DECLARE_int32_(random_seed);
+
+// This flag sets how many times the tests are repeated. The default value
+// is 1. If the value is -1 the tests are repeating forever.
+GTEST_DECLARE_int32_(repeat);
+
+// This flag controls whether Google Test includes Google Test internal
+// stack frames in failure stack traces.
+GTEST_DECLARE_bool_(show_internal_stack_frames);
+
+// When this flag is specified, tests' order is randomized on every iteration.
+GTEST_DECLARE_bool_(shuffle);
+
+// This flag specifies the maximum number of stack frames to be
+// printed in a failure message.
+GTEST_DECLARE_int32_(stack_trace_depth);
+
+// When this flag is specified, a failed assertion will throw an
+// exception if exceptions are enabled, or exit the program with a
+// non-zero code otherwise. For use with an external test framework.
+GTEST_DECLARE_bool_(throw_on_failure);
+
+// When this flag is set with a "host:port" string, on supported
+// platforms test results are streamed to the specified port on
+// the specified host machine.
+GTEST_DECLARE_string_(stream_result_to);
+
+#if GTEST_USE_OWN_FLAGFILE_FLAG_
+GTEST_DECLARE_string_(flagfile);
+#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
+
+// The upper limit for valid stack trace depths.
+const int kMaxStackTraceDepth = 100;
+
+namespace internal {
+
+class AssertHelper;
+class DefaultGlobalTestPartResultReporter;
+class ExecDeathTest;
+class NoExecDeathTest;
+class FinalSuccessChecker;
+class GTestFlagSaver;
+class StreamingListenerTest;
+class TestResultAccessor;
+class TestEventListenersAccessor;
+class TestEventRepeater;
+class UnitTestRecordPropertyTestHelper;
+class WindowsDeathTest;
+class FuchsiaDeathTest;
+class UnitTestImpl* GetUnitTestImpl();
+void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
+                                    const std::string& message);
+std::set<std::string>* GetIgnoredParameterizedTestSuites();
+
+}  // namespace internal
+
+// The friend relationship of some of these classes is cyclic.
+// If we don't forward declare them the compiler might confuse the classes
+// in friendship clauses with same named classes on the scope.
+class Test;
+class TestSuite;
+
+// Old API is still available but deprecated
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+using TestCase = TestSuite;
+#endif
+class TestInfo;
+class UnitTest;
+
+// A class for indicating whether an assertion was successful.  When
+// the assertion wasn't successful, the AssertionResult object
+// remembers a non-empty message that describes how it failed.
+//
+// To create an instance of this class, use one of the factory functions
+// (AssertionSuccess() and AssertionFailure()).
+//
+// This class is useful for two purposes:
+//   1. Defining predicate functions to be used with Boolean test assertions
+//      EXPECT_TRUE/EXPECT_FALSE and their ASSERT_ counterparts
+//   2. Defining predicate-format functions to be
+//      used with predicate assertions (ASSERT_PRED_FORMAT*, etc).
+//
+// For example, if you define IsEven predicate:
+//
+//   testing::AssertionResult IsEven(int n) {
+//     if ((n % 2) == 0)
+//       return testing::AssertionSuccess();
+//     else
+//       return testing::AssertionFailure() << n << " is odd";
+//   }
+//
+// Then the failed expectation EXPECT_TRUE(IsEven(Fib(5)))
+// will print the message
+//
+//   Value of: IsEven(Fib(5))
+//     Actual: false (5 is odd)
+//   Expected: true
+//
+// instead of a more opaque
+//
+//   Value of: IsEven(Fib(5))
+//     Actual: false
+//   Expected: true
+//
+// in case IsEven is a simple Boolean predicate.
+//
+// If you expect your predicate to be reused and want to support informative
+// messages in EXPECT_FALSE and ASSERT_FALSE (negative assertions show up
+// about half as often as positive ones in our tests), supply messages for
+// both success and failure cases:
+//
+//   testing::AssertionResult IsEven(int n) {
+//     if ((n % 2) == 0)
+//       return testing::AssertionSuccess() << n << " is even";
+//     else
+//       return testing::AssertionFailure() << n << " is odd";
+//   }
+//
+// Then a statement EXPECT_FALSE(IsEven(Fib(6))) will print
+//
+//   Value of: IsEven(Fib(6))
+//     Actual: true (8 is even)
+//   Expected: false
+//
+// NB: Predicates that support negative Boolean assertions have reduced
+// performance in positive ones so be careful not to use them in tests
+// that have lots (tens of thousands) of positive Boolean assertions.
+//
+// To use this class with EXPECT_PRED_FORMAT assertions such as:
+//
+//   // Verifies that Foo() returns an even number.
+//   EXPECT_PRED_FORMAT1(IsEven, Foo());
+//
+// you need to define:
+//
+//   testing::AssertionResult IsEven(const char* expr, int n) {
+//     if ((n % 2) == 0)
+//       return testing::AssertionSuccess();
+//     else
+//       return testing::AssertionFailure()
+//         << "Expected: " << expr << " is even\n  Actual: it's " << n;
+//   }
+//
+// If Foo() returns 5, you will see the following message:
+//
+//   Expected: Foo() is even
+//     Actual: it's 5
+//
+class GTEST_API_ AssertionResult {
+ public:
+  // Copy constructor.
+  // Used in EXPECT_TRUE/FALSE(assertion_result).
+  AssertionResult(const AssertionResult& other);
+
+// C4800 is a level 3 warning in Visual Studio 2015 and earlier.
+// This warning is not emitted in Visual Studio 2017.
+// This warning is off by default starting in Visual Studio 2019 but can be
+// enabled with command-line options.
+#if defined(_MSC_VER) && (_MSC_VER < 1910 || _MSC_VER >= 1920)
+  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 /* forcing value to bool */)
+#endif
+
+  // Used in the EXPECT_TRUE/FALSE(bool_expression).
+  //
+  // T must be contextually convertible to bool.
+  //
+  // The second parameter prevents this overload from being considered if
+  // the argument is implicitly convertible to AssertionResult. In that case
+  // we want AssertionResult's copy constructor to be used.
+  template <typename T>
+  explicit AssertionResult(
+      const T& success,
+      typename std::enable_if<
+          !std::is_convertible<T, AssertionResult>::value>::type*
+      /*enabler*/
+      = nullptr)
+      : success_(success) {}
+
+#if defined(_MSC_VER) && (_MSC_VER < 1910 || _MSC_VER >= 1920)
+  GTEST_DISABLE_MSC_WARNINGS_POP_()
+#endif
+
+  // Assignment operator.
+  AssertionResult& operator=(AssertionResult other) {
+    swap(other);
+    return *this;
+  }
+
+  // Returns true if and only if the assertion succeeded.
+  operator bool() const { return success_; }  // NOLINT
+
+  // Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
+  AssertionResult operator!() const;
+
+  // Returns the text streamed into this AssertionResult. Test assertions
+  // use it when they fail (i.e., the predicate's outcome doesn't match the
+  // assertion's expectation). When nothing has been streamed into the
+  // object, returns an empty string.
+  const char* message() const {
+    return message_.get() != nullptr ? message_->c_str() : "";
+  }
+  // Deprecated; please use message() instead.
+  const char* failure_message() const { return message(); }
+
+  // Streams a custom failure message into this object.
+  template <typename T> AssertionResult& operator<<(const T& value) {
+    AppendMessage(Message() << value);
+    return *this;
+  }
+
+  // Allows streaming basic output manipulators such as endl or flush into
+  // this object.
+  AssertionResult& operator<<(
+      ::std::ostream& (*basic_manipulator)(::std::ostream& stream)) {
+    AppendMessage(Message() << basic_manipulator);
+    return *this;
+  }
+
+ private:
+  // Appends the contents of message to message_.
+  void AppendMessage(const Message& a_message) {
+    if (message_.get() == nullptr) message_.reset(new ::std::string);
+    message_->append(a_message.GetString().c_str());
+  }
+
+  // Swap the contents of this AssertionResult with other.
+  void swap(AssertionResult& other);
+
+  // Stores result of the assertion predicate.
+  bool success_;
+  // Stores the message describing the condition in case the expectation
+  // construct is not satisfied with the predicate's outcome.
+  // Referenced via a pointer to avoid taking too much stack frame space
+  // with test assertions.
+  std::unique_ptr< ::std::string> message_;
+};
+
+// Makes a successful assertion result.
+GTEST_API_ AssertionResult AssertionSuccess();
+
+// Makes a failed assertion result.
+GTEST_API_ AssertionResult AssertionFailure();
+
+// Makes a failed assertion result with the given failure message.
+// Deprecated; use AssertionFailure() << msg.
+GTEST_API_ AssertionResult AssertionFailure(const Message& msg);
+
+}  // namespace testing
+
+// Includes the auto-generated header that implements a family of generic
+// predicate assertion macros. This include comes late because it relies on
+// APIs declared above.
+// Copyright 2006, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// This file is AUTOMATICALLY GENERATED on 01/02/2019 by command
+// 'gen_gtest_pred_impl.py 5'.  DO NOT EDIT BY HAND!
+//
+// Implements a family of generic predicate assertion macros.
+// GOOGLETEST_CM0001 DO NOT DELETE
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
+#define GOOGLETEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
+
+
+namespace testing {
+
+// This header implements a family of generic predicate assertion
+// macros:
+//
+//   ASSERT_PRED_FORMAT1(pred_format, v1)
+//   ASSERT_PRED_FORMAT2(pred_format, v1, v2)
+//   ...
+//
+// where pred_format is a function or functor that takes n (in the
+// case of ASSERT_PRED_FORMATn) values and their source expression
+// text, and returns a testing::AssertionResult.  See the definition
+// of ASSERT_EQ in gtest.h for an example.
+//
+// If you don't care about formatting, you can use the more
+// restrictive version:
+//
+//   ASSERT_PRED1(pred, v1)
+//   ASSERT_PRED2(pred, v1, v2)
+//   ...
+//
+// where pred is an n-ary function or functor that returns bool,
+// and the values v1, v2, ..., must support the << operator for
+// streaming to std::ostream.
+//
+// We also define the EXPECT_* variations.
+//
+// For now we only support predicates whose arity is at most 5.
+// Please email googletestframework@googlegroups.com if you need
+// support for higher arities.
+
+// GTEST_ASSERT_ is the basic statement to which all of the assertions
+// in this file reduce.  Don't use this in your code.
+
+#define GTEST_ASSERT_(expression, on_failure) \
+  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
+  if (const ::testing::AssertionResult gtest_ar = (expression)) \
+    ; \
+  else \
+    on_failure(gtest_ar.failure_message())
+
+
+// Helper function for implementing {EXPECT|ASSERT}_PRED1.  Don't use
+// this in your code.
+template <typename Pred,
+          typename T1>
+AssertionResult AssertPred1Helper(const char* pred_text,
+                                  const char* e1,
+                                  Pred pred,
+                                  const T1& v1) {
+  if (pred(v1)) return AssertionSuccess();
+
+  return AssertionFailure()
+         << pred_text << "(" << e1 << ") evaluates to false, where"
+         << "\n"
+         << e1 << " evaluates to " << ::testing::PrintToString(v1);
+}
+
+// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT1.
+// Don't use this in your code.
+#define GTEST_PRED_FORMAT1_(pred_format, v1, on_failure)\
+  GTEST_ASSERT_(pred_format(#v1, v1), \
+                on_failure)
+
+// Internal macro for implementing {EXPECT|ASSERT}_PRED1.  Don't use
+// this in your code.
+#define GTEST_PRED1_(pred, v1, on_failure)\
+  GTEST_ASSERT_(::testing::AssertPred1Helper(#pred, \
+                                             #v1, \
+                                             pred, \
+                                             v1), on_failure)
+
+// Unary predicate assertion macros.
+#define EXPECT_PRED_FORMAT1(pred_format, v1) \
+  GTEST_PRED_FORMAT1_(pred_format, v1, GTEST_NONFATAL_FAILURE_)
+#define EXPECT_PRED1(pred, v1) \
+  GTEST_PRED1_(pred, v1, GTEST_NONFATAL_FAILURE_)
+#define ASSERT_PRED_FORMAT1(pred_format, v1) \
+  GTEST_PRED_FORMAT1_(pred_format, v1, GTEST_FATAL_FAILURE_)
+#define ASSERT_PRED1(pred, v1) \
+  GTEST_PRED1_(pred, v1, GTEST_FATAL_FAILURE_)
+
+
+
+// Helper function for implementing {EXPECT|ASSERT}_PRED2.  Don't use
+// this in your code.
+template <typename Pred,
+          typename T1,
+          typename T2>
+AssertionResult AssertPred2Helper(const char* pred_text,
+                                  const char* e1,
+                                  const char* e2,
+                                  Pred pred,
+                                  const T1& v1,
+                                  const T2& v2) {
+  if (pred(v1, v2)) return AssertionSuccess();
+
+  return AssertionFailure()
+         << pred_text << "(" << e1 << ", " << e2
+         << ") evaluates to false, where"
+         << "\n"
+         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
+         << e2 << " evaluates to " << ::testing::PrintToString(v2);
+}
+
+// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT2.
+// Don't use this in your code.
+#define GTEST_PRED_FORMAT2_(pred_format, v1, v2, on_failure)\
+  GTEST_ASSERT_(pred_format(#v1, #v2, v1, v2), \
+                on_failure)
+
+// Internal macro for implementing {EXPECT|ASSERT}_PRED2.  Don't use
+// this in your code.
+#define GTEST_PRED2_(pred, v1, v2, on_failure)\
+  GTEST_ASSERT_(::testing::AssertPred2Helper(#pred, \
+                                             #v1, \
+                                             #v2, \
+                                             pred, \
+                                             v1, \
+                                             v2), on_failure)
+
+// Binary predicate assertion macros.
+#define EXPECT_PRED_FORMAT2(pred_format, v1, v2) \
+  GTEST_PRED_FORMAT2_(pred_format, v1, v2, GTEST_NONFATAL_FAILURE_)
+#define EXPECT_PRED2(pred, v1, v2) \
+  GTEST_PRED2_(pred, v1, v2, GTEST_NONFATAL_FAILURE_)
+#define ASSERT_PRED_FORMAT2(pred_format, v1, v2) \
+  GTEST_PRED_FORMAT2_(pred_format, v1, v2, GTEST_FATAL_FAILURE_)
+#define ASSERT_PRED2(pred, v1, v2) \
+  GTEST_PRED2_(pred, v1, v2, GTEST_FATAL_FAILURE_)
+
+
+
+// Helper function for implementing {EXPECT|ASSERT}_PRED3.  Don't use
+// this in your code.
+template <typename Pred,
+          typename T1,
+          typename T2,
+          typename T3>
+AssertionResult AssertPred3Helper(const char* pred_text,
+                                  const char* e1,
+                                  const char* e2,
+                                  const char* e3,
+                                  Pred pred,
+                                  const T1& v1,
+                                  const T2& v2,
+                                  const T3& v3) {
+  if (pred(v1, v2, v3)) return AssertionSuccess();
+
+  return AssertionFailure()
+         << pred_text << "(" << e1 << ", " << e2 << ", " << e3
+         << ") evaluates to false, where"
+         << "\n"
+         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
+         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
+         << e3 << " evaluates to " << ::testing::PrintToString(v3);
+}
+
+// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT3.
+// Don't use this in your code.
+#define GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, on_failure)\
+  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, v1, v2, v3), \
+                on_failure)
+
+// Internal macro for implementing {EXPECT|ASSERT}_PRED3.  Don't use
+// this in your code.
+#define GTEST_PRED3_(pred, v1, v2, v3, on_failure)\
+  GTEST_ASSERT_(::testing::AssertPred3Helper(#pred, \
+                                             #v1, \
+                                             #v2, \
+                                             #v3, \
+                                             pred, \
+                                             v1, \
+                                             v2, \
+                                             v3), on_failure)
+
+// Ternary predicate assertion macros.
+#define EXPECT_PRED_FORMAT3(pred_format, v1, v2, v3) \
+  GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, GTEST_NONFATAL_FAILURE_)
+#define EXPECT_PRED3(pred, v1, v2, v3) \
+  GTEST_PRED3_(pred, v1, v2, v3, GTEST_NONFATAL_FAILURE_)
+#define ASSERT_PRED_FORMAT3(pred_format, v1, v2, v3) \
+  GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, GTEST_FATAL_FAILURE_)
+#define ASSERT_PRED3(pred, v1, v2, v3) \
+  GTEST_PRED3_(pred, v1, v2, v3, GTEST_FATAL_FAILURE_)
+
+
+
+// Helper function for implementing {EXPECT|ASSERT}_PRED4.  Don't use
+// this in your code.
+template <typename Pred,
+          typename T1,
+          typename T2,
+          typename T3,
+          typename T4>
+AssertionResult AssertPred4Helper(const char* pred_text,
+                                  const char* e1,
+                                  const char* e2,
+                                  const char* e3,
+                                  const char* e4,
+                                  Pred pred,
+                                  const T1& v1,
+                                  const T2& v2,
+                                  const T3& v3,
+                                  const T4& v4) {
+  if (pred(v1, v2, v3, v4)) return AssertionSuccess();
+
+  return AssertionFailure()
+         << pred_text << "(" << e1 << ", " << e2 << ", " << e3 << ", " << e4
+         << ") evaluates to false, where"
+         << "\n"
+         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
+         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
+         << e3 << " evaluates to " << ::testing::PrintToString(v3) << "\n"
+         << e4 << " evaluates to " << ::testing::PrintToString(v4);
+}
+
+// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT4.
+// Don't use this in your code.
+#define GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, on_failure)\
+  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, #v4, v1, v2, v3, v4), \
+                on_failure)
+
+// Internal macro for implementing {EXPECT|ASSERT}_PRED4.  Don't use
+// this in your code.
+#define GTEST_PRED4_(pred, v1, v2, v3, v4, on_failure)\
+  GTEST_ASSERT_(::testing::AssertPred4Helper(#pred, \
+                                             #v1, \
+                                             #v2, \
+                                             #v3, \
+                                             #v4, \
+                                             pred, \
+                                             v1, \
+                                             v2, \
+                                             v3, \
+                                             v4), on_failure)
+
+// 4-ary predicate assertion macros.
+#define EXPECT_PRED_FORMAT4(pred_format, v1, v2, v3, v4) \
+  GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, GTEST_NONFATAL_FAILURE_)
+#define EXPECT_PRED4(pred, v1, v2, v3, v4) \
+  GTEST_PRED4_(pred, v1, v2, v3, v4, GTEST_NONFATAL_FAILURE_)
+#define ASSERT_PRED_FORMAT4(pred_format, v1, v2, v3, v4) \
+  GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, GTEST_FATAL_FAILURE_)
+#define ASSERT_PRED4(pred, v1, v2, v3, v4) \
+  GTEST_PRED4_(pred, v1, v2, v3, v4, GTEST_FATAL_FAILURE_)
+
+
+
+// Helper function for implementing {EXPECT|ASSERT}_PRED5.  Don't use
+// this in your code.
+template <typename Pred,
+          typename T1,
+          typename T2,
+          typename T3,
+          typename T4,
+          typename T5>
+AssertionResult AssertPred5Helper(const char* pred_text,
+                                  const char* e1,
+                                  const char* e2,
+                                  const char* e3,
+                                  const char* e4,
+                                  const char* e5,
+                                  Pred pred,
+                                  const T1& v1,
+                                  const T2& v2,
+                                  const T3& v3,
+                                  const T4& v4,
+                                  const T5& v5) {
+  if (pred(v1, v2, v3, v4, v5)) return AssertionSuccess();
+
+  return AssertionFailure()
+         << pred_text << "(" << e1 << ", " << e2 << ", " << e3 << ", " << e4
+         << ", " << e5 << ") evaluates to false, where"
+         << "\n"
+         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
+         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
+         << e3 << " evaluates to " << ::testing::PrintToString(v3) << "\n"
+         << e4 << " evaluates to " << ::testing::PrintToString(v4) << "\n"
+         << e5 << " evaluates to " << ::testing::PrintToString(v5);
+}
+
+// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT5.
+// Don't use this in your code.
+#define GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, on_failure)\
+  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, #v4, #v5, v1, v2, v3, v4, v5), \
+                on_failure)
+
+// Internal macro for implementing {EXPECT|ASSERT}_PRED5.  Don't use
+// this in your code.
+#define GTEST_PRED5_(pred, v1, v2, v3, v4, v5, on_failure)\
+  GTEST_ASSERT_(::testing::AssertPred5Helper(#pred, \
+                                             #v1, \
+                                             #v2, \
+                                             #v3, \
+                                             #v4, \
+                                             #v5, \
+                                             pred, \
+                                             v1, \
+                                             v2, \
+                                             v3, \
+                                             v4, \
+                                             v5), on_failure)
+
+// 5-ary predicate assertion macros.
+#define EXPECT_PRED_FORMAT5(pred_format, v1, v2, v3, v4, v5) \
+  GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, GTEST_NONFATAL_FAILURE_)
+#define EXPECT_PRED5(pred, v1, v2, v3, v4, v5) \
+  GTEST_PRED5_(pred, v1, v2, v3, v4, v5, GTEST_NONFATAL_FAILURE_)
+#define ASSERT_PRED_FORMAT5(pred_format, v1, v2, v3, v4, v5) \
+  GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, GTEST_FATAL_FAILURE_)
+#define ASSERT_PRED5(pred, v1, v2, v3, v4, v5) \
+  GTEST_PRED5_(pred, v1, v2, v3, v4, v5, GTEST_FATAL_FAILURE_)
+
+
+
+}  // namespace testing
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
+
+namespace testing {
+
+// The abstract class that all tests inherit from.
+//
+// In Google Test, a unit test program contains one or many TestSuites, and
+// each TestSuite contains one or many Tests.
+//
+// When you define a test using the TEST macro, you don't need to
+// explicitly derive from Test - the TEST macro automatically does
+// this for you.
+//
+// The only time you derive from Test is when defining a test fixture
+// to be used in a TEST_F.  For example:
+//
+//   class FooTest : public testing::Test {
+//    protected:
+//     void SetUp() override { ... }
+//     void TearDown() override { ... }
+//     ...
+//   };
+//
+//   TEST_F(FooTest, Bar) { ... }
+//   TEST_F(FooTest, Baz) { ... }
+//
+// Test is not copyable.
+class GTEST_API_ Test {
+ public:
+  friend class TestInfo;
+
+  // The d'tor is virtual as we intend to inherit from Test.
+  virtual ~Test();
+
+  // Sets up the stuff shared by all tests in this test suite.
+  //
+  // Google Test will call Foo::SetUpTestSuite() before running the first
+  // test in test suite Foo.  Hence a sub-class can define its own
+  // SetUpTestSuite() method to shadow the one defined in the super
+  // class.
+  static void SetUpTestSuite() {}
+
+  // Tears down the stuff shared by all tests in this test suite.
+  //
+  // Google Test will call Foo::TearDownTestSuite() after running the last
+  // test in test suite Foo.  Hence a sub-class can define its own
+  // TearDownTestSuite() method to shadow the one defined in the super
+  // class.
+  static void TearDownTestSuite() {}
+
+  // Legacy API is deprecated but still available. Use SetUpTestSuite and
+  // TearDownTestSuite instead.
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  static void TearDownTestCase() {}
+  static void SetUpTestCase() {}
+#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  // Returns true if and only if the current test has a fatal failure.
+  static bool HasFatalFailure();
+
+  // Returns true if and only if the current test has a non-fatal failure.
+  static bool HasNonfatalFailure();
+
+  // Returns true if and only if the current test was skipped.
+  static bool IsSkipped();
+
+  // Returns true if and only if the current test has a (either fatal or
+  // non-fatal) failure.
+  static bool HasFailure() { return HasFatalFailure() || HasNonfatalFailure(); }
+
+  // Logs a property for the current test, test suite, or for the entire
+  // invocation of the test program when used outside of the context of a
+  // test suite.  Only the last value for a given key is remembered.  These
+  // are public static so they can be called from utility functions that are
+  // not members of the test fixture.  Calls to RecordProperty made during
+  // lifespan of the test (from the moment its constructor starts to the
+  // moment its destructor finishes) will be output in XML as attributes of
+  // the <testcase> element.  Properties recorded from fixture's
+  // SetUpTestSuite or TearDownTestSuite are logged as attributes of the
+  // corresponding <testsuite> element.  Calls to RecordProperty made in the
+  // global context (before or after invocation of RUN_ALL_TESTS and from
+  // SetUp/TearDown method of Environment objects registered with Google
+  // Test) will be output as attributes of the <testsuites> element.
+  static void RecordProperty(const std::string& key, const std::string& value);
+  static void RecordProperty(const std::string& key, int value);
+
+ protected:
+  // Creates a Test object.
+  Test();
+
+  // Sets up the test fixture.
+  virtual void SetUp();
+
+  // Tears down the test fixture.
+  virtual void TearDown();
+
+ private:
+  // Returns true if and only if the current test has the same fixture class
+  // as the first test in the current test suite.
+  static bool HasSameFixtureClass();
+
+  // Runs the test after the test fixture has been set up.
+  //
+  // A sub-class must implement this to define the test logic.
+  //
+  // DO NOT OVERRIDE THIS FUNCTION DIRECTLY IN A USER PROGRAM.
+  // Instead, use the TEST or TEST_F macro.
+  virtual void TestBody() = 0;
+
+  // Sets up, executes, and tears down the test.
+  void Run();
+
+  // Deletes self.  We deliberately pick an unusual name for this
+  // internal method to avoid clashing with names used in user TESTs.
+  void DeleteSelf_() { delete this; }
+
+  const std::unique_ptr<GTEST_FLAG_SAVER_> gtest_flag_saver_;
+
+  // Often a user misspells SetUp() as Setup() and spends a long time
+  // wondering why it is never called by Google Test.  The declaration of
+  // the following method is solely for catching such an error at
+  // compile time:
+  //
+  //   - The return type is deliberately chosen to be not void, so it
+  //   will be a conflict if void Setup() is declared in the user's
+  //   test fixture.
+  //
+  //   - This method is private, so it will be another compiler error
+  //   if the method is called from the user's test fixture.
+  //
+  // DO NOT OVERRIDE THIS FUNCTION.
+  //
+  // If you see an error about overriding the following function or
+  // about it being private, you have mis-spelled SetUp() as Setup().
+  struct Setup_should_be_spelled_SetUp {};
+  virtual Setup_should_be_spelled_SetUp* Setup() { return nullptr; }
+
+  // We disallow copying Tests.
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(Test);
+};
+
+typedef internal::TimeInMillis TimeInMillis;
+
+// A copyable object representing a user specified test property which can be
+// output as a key/value string pair.
+//
+// Don't inherit from TestProperty as its destructor is not virtual.
+class TestProperty {
+ public:
+  // C'tor.  TestProperty does NOT have a default constructor.
+  // Always use this constructor (with parameters) to create a
+  // TestProperty object.
+  TestProperty(const std::string& a_key, const std::string& a_value) :
+    key_(a_key), value_(a_value) {
+  }
+
+  // Gets the user supplied key.
+  const char* key() const {
+    return key_.c_str();
+  }
+
+  // Gets the user supplied value.
+  const char* value() const {
+    return value_.c_str();
+  }
+
+  // Sets a new value, overriding the one supplied in the constructor.
+  void SetValue(const std::string& new_value) {
+    value_ = new_value;
+  }
+
+ private:
+  // The key supplied by the user.
+  std::string key_;
+  // The value supplied by the user.
+  std::string value_;
+};
+
+// The result of a single Test.  This includes a list of
+// TestPartResults, a list of TestProperties, a count of how many
+// death tests there are in the Test, and how much time it took to run
+// the Test.
+//
+// TestResult is not copyable.
+class GTEST_API_ TestResult {
+ public:
+  // Creates an empty TestResult.
+  TestResult();
+
+  // D'tor.  Do not inherit from TestResult.
+  ~TestResult();
+
+  // Gets the number of all test parts.  This is the sum of the number
+  // of successful test parts and the number of failed test parts.
+  int total_part_count() const;
+
+  // Returns the number of the test properties.
+  int test_property_count() const;
+
+  // Returns true if and only if the test passed (i.e. no test part failed).
+  bool Passed() const { return !Skipped() && !Failed(); }
+
+  // Returns true if and only if the test was skipped.
+  bool Skipped() const;
+
+  // Returns true if and only if the test failed.
+  bool Failed() const;
+
+  // Returns true if and only if the test fatally failed.
+  bool HasFatalFailure() const;
+
+  // Returns true if and only if the test has a non-fatal failure.
+  bool HasNonfatalFailure() const;
+
+  // Returns the elapsed time, in milliseconds.
+  TimeInMillis elapsed_time() const { return elapsed_time_; }
+
+  // Gets the time of the test case start, in ms from the start of the
+  // UNIX epoch.
+  TimeInMillis start_timestamp() const { return start_timestamp_; }
+
+  // Returns the i-th test part result among all the results. i can range from 0
+  // to total_part_count() - 1. If i is not in that range, aborts the program.
+  const TestPartResult& GetTestPartResult(int i) const;
+
+  // Returns the i-th test property. i can range from 0 to
+  // test_property_count() - 1. If i is not in that range, aborts the
+  // program.
+  const TestProperty& GetTestProperty(int i) const;
+
+ private:
+  friend class TestInfo;
+  friend class TestSuite;
+  friend class UnitTest;
+  friend class internal::DefaultGlobalTestPartResultReporter;
+  friend class internal::ExecDeathTest;
+  friend class internal::TestResultAccessor;
+  friend class internal::UnitTestImpl;
+  friend class internal::WindowsDeathTest;
+  friend class internal::FuchsiaDeathTest;
+
+  // Gets the vector of TestPartResults.
+  const std::vector<TestPartResult>& test_part_results() const {
+    return test_part_results_;
+  }
+
+  // Gets the vector of TestProperties.
+  const std::vector<TestProperty>& test_properties() const {
+    return test_properties_;
+  }
+
+  // Sets the start time.
+  void set_start_timestamp(TimeInMillis start) { start_timestamp_ = start; }
+
+  // Sets the elapsed time.
+  void set_elapsed_time(TimeInMillis elapsed) { elapsed_time_ = elapsed; }
+
+  // Adds a test property to the list. The property is validated and may add
+  // a non-fatal failure if invalid (e.g., if it conflicts with reserved
+  // key names). If a property is already recorded for the same key, the
+  // value will be updated, rather than storing multiple values for the same
+  // key.  xml_element specifies the element for which the property is being
+  // recorded and is used for validation.
+  void RecordProperty(const std::string& xml_element,
+                      const TestProperty& test_property);
+
+  // Adds a failure if the key is a reserved attribute of Google Test
+  // testsuite tags.  Returns true if the property is valid.
+  // FIXME: Validate attribute names are legal and human readable.
+  static bool ValidateTestProperty(const std::string& xml_element,
+                                   const TestProperty& test_property);
+
+  // Adds a test part result to the list.
+  void AddTestPartResult(const TestPartResult& test_part_result);
+
+  // Returns the death test count.
+  int death_test_count() const { return death_test_count_; }
+
+  // Increments the death test count, returning the new count.
+  int increment_death_test_count() { return ++death_test_count_; }
+
+  // Clears the test part results.
+  void ClearTestPartResults();
+
+  // Clears the object.
+  void Clear();
+
+  // Protects mutable state of the property vector and of owned
+  // properties, whose values may be updated.
+  internal::Mutex test_properties_mutex_;
+
+  // The vector of TestPartResults
+  std::vector<TestPartResult> test_part_results_;
+  // The vector of TestProperties
+  std::vector<TestProperty> test_properties_;
+  // Running count of death tests.
+  int death_test_count_;
+  // The start time, in milliseconds since UNIX Epoch.
+  TimeInMillis start_timestamp_;
+  // The elapsed time, in milliseconds.
+  TimeInMillis elapsed_time_;
+
+  // We disallow copying TestResult.
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestResult);
+};  // class TestResult
+
+// A TestInfo object stores the following information about a test:
+//
+//   Test suite name
+//   Test name
+//   Whether the test should be run
+//   A function pointer that creates the test object when invoked
+//   Test result
+//
+// The constructor of TestInfo registers itself with the UnitTest
+// singleton such that the RUN_ALL_TESTS() macro knows which tests to
+// run.
+class GTEST_API_ TestInfo {
+ public:
+  // Destructs a TestInfo object.  This function is not virtual, so
+  // don't inherit from TestInfo.
+  ~TestInfo();
+
+  // Returns the test suite name.
+  const char* test_suite_name() const { return test_suite_name_.c_str(); }
+
+// Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  const char* test_case_name() const { return test_suite_name(); }
+#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  // Returns the test name.
+  const char* name() const { return name_.c_str(); }
+
+  // Returns the name of the parameter type, or NULL if this is not a typed
+  // or a type-parameterized test.
+  const char* type_param() const {
+    if (type_param_.get() != nullptr) return type_param_->c_str();
+    return nullptr;
+  }
+
+  // Returns the text representation of the value parameter, or NULL if this
+  // is not a value-parameterized test.
+  const char* value_param() const {
+    if (value_param_.get() != nullptr) return value_param_->c_str();
+    return nullptr;
+  }
+
+  // Returns the file name where this test is defined.
+  const char* file() const { return location_.file.c_str(); }
+
+  // Returns the line where this test is defined.
+  int line() const { return location_.line; }
+
+  // Return true if this test should not be run because it's in another shard.
+  bool is_in_another_shard() const { return is_in_another_shard_; }
+
+  // Returns true if this test should run, that is if the test is not
+  // disabled (or it is disabled but the also_run_disabled_tests flag has
+  // been specified) and its full name matches the user-specified filter.
+  //
+  // Google Test allows the user to filter the tests by their full names.
+  // The full name of a test Bar in test suite Foo is defined as
+  // "Foo.Bar".  Only the tests that match the filter will run.
+  //
+  // A filter is a colon-separated list of glob (not regex) patterns,
+  // optionally followed by a '-' and a colon-separated list of
+  // negative patterns (tests to exclude).  A test is run if it
+  // matches one of the positive patterns and does not match any of
+  // the negative patterns.
+  //
+  // For example, *A*:Foo.* is a filter that matches any string that
+  // contains the character 'A' or starts with "Foo.".
+  bool should_run() const { return should_run_; }
+
+  // Returns true if and only if this test will appear in the XML report.
+  bool is_reportable() const {
+    // The XML report includes tests matching the filter, excluding those
+    // run in other shards.
+    return matches_filter_ && !is_in_another_shard_;
+  }
+
+  // Returns the result of the test.
+  const TestResult* result() const { return &result_; }
+
+ private:
+#if GTEST_HAS_DEATH_TEST
+  friend class internal::DefaultDeathTestFactory;
+#endif  // GTEST_HAS_DEATH_TEST
+  friend class Test;
+  friend class TestSuite;
+  friend class internal::UnitTestImpl;
+  friend class internal::StreamingListenerTest;
+  friend TestInfo* internal::MakeAndRegisterTestInfo(
+      const char* test_suite_name, const char* name, const char* type_param,
+      const char* value_param, internal::CodeLocation code_location,
+      internal::TypeId fixture_class_id, internal::SetUpTestSuiteFunc set_up_tc,
+      internal::TearDownTestSuiteFunc tear_down_tc,
+      internal::TestFactoryBase* factory);
+
+  // Constructs a TestInfo object. The newly constructed instance assumes
+  // ownership of the factory object.
+  TestInfo(const std::string& test_suite_name, const std::string& name,
+           const char* a_type_param,   // NULL if not a type-parameterized test
+           const char* a_value_param,  // NULL if not a value-parameterized test
+           internal::CodeLocation a_code_location,
+           internal::TypeId fixture_class_id,
+           internal::TestFactoryBase* factory);
+
+  // Increments the number of death tests encountered in this test so
+  // far.
+  int increment_death_test_count() {
+    return result_.increment_death_test_count();
+  }
+
+  // Creates the test object, runs it, records its result, and then
+  // deletes it.
+  void Run();
+
+  // Skip and records the test result for this object.
+  void Skip();
+
+  static void ClearTestResult(TestInfo* test_info) {
+    test_info->result_.Clear();
+  }
+
+  // These fields are immutable properties of the test.
+  const std::string test_suite_name_;    // test suite name
+  const std::string name_;               // Test name
+  // Name of the parameter type, or NULL if this is not a typed or a
+  // type-parameterized test.
+  const std::unique_ptr<const ::std::string> type_param_;
+  // Text representation of the value parameter, or NULL if this is not a
+  // value-parameterized test.
+  const std::unique_ptr<const ::std::string> value_param_;
+  internal::CodeLocation location_;
+  const internal::TypeId fixture_class_id_;  // ID of the test fixture class
+  bool should_run_;           // True if and only if this test should run
+  bool is_disabled_;          // True if and only if this test is disabled
+  bool matches_filter_;       // True if this test matches the
+                              // user-specified filter.
+  bool is_in_another_shard_;  // Will be run in another shard.
+  internal::TestFactoryBase* const factory_;  // The factory that creates
+                                              // the test object
+
+  // This field is mutable and needs to be reset before running the
+  // test for the second time.
+  TestResult result_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestInfo);
+};
+
+// A test suite, which consists of a vector of TestInfos.
+//
+// TestSuite is not copyable.
+class GTEST_API_ TestSuite {
+ public:
+  // Creates a TestSuite with the given name.
+  //
+  // TestSuite does NOT have a default constructor.  Always use this
+  // constructor to create a TestSuite object.
+  //
+  // Arguments:
+  //
+  //   name:         name of the test suite
+  //   a_type_param: the name of the test's type parameter, or NULL if
+  //                 this is not a type-parameterized test.
+  //   set_up_tc:    pointer to the function that sets up the test suite
+  //   tear_down_tc: pointer to the function that tears down the test suite
+  TestSuite(const char* name, const char* a_type_param,
+            internal::SetUpTestSuiteFunc set_up_tc,
+            internal::TearDownTestSuiteFunc tear_down_tc);
+
+  // Destructor of TestSuite.
+  virtual ~TestSuite();
+
+  // Gets the name of the TestSuite.
+  const char* name() const { return name_.c_str(); }
+
+  // Returns the name of the parameter type, or NULL if this is not a
+  // type-parameterized test suite.
+  const char* type_param() const {
+    if (type_param_.get() != nullptr) return type_param_->c_str();
+    return nullptr;
+  }
+
+  // Returns true if any test in this test suite should run.
+  bool should_run() const { return should_run_; }
+
+  // Gets the number of successful tests in this test suite.
+  int successful_test_count() const;
+
+  // Gets the number of skipped tests in this test suite.
+  int skipped_test_count() const;
+
+  // Gets the number of failed tests in this test suite.
+  int failed_test_count() const;
+
+  // Gets the number of disabled tests that will be reported in the XML report.
+  int reportable_disabled_test_count() const;
+
+  // Gets the number of disabled tests in this test suite.
+  int disabled_test_count() const;
+
+  // Gets the number of tests to be printed in the XML report.
+  int reportable_test_count() const;
+
+  // Get the number of tests in this test suite that should run.
+  int test_to_run_count() const;
+
+  // Gets the number of all tests in this test suite.
+  int total_test_count() const;
+
+  // Returns true if and only if the test suite passed.
+  bool Passed() const { return !Failed(); }
+
+  // Returns true if and only if the test suite failed.
+  bool Failed() const {
+    return failed_test_count() > 0 || ad_hoc_test_result().Failed();
+  }
+
+  // Returns the elapsed time, in milliseconds.
+  TimeInMillis elapsed_time() const { return elapsed_time_; }
+
+  // Gets the time of the test suite start, in ms from the start of the
+  // UNIX epoch.
+  TimeInMillis start_timestamp() const { return start_timestamp_; }
+
+  // Returns the i-th test among all the tests. i can range from 0 to
+  // total_test_count() - 1. If i is not in that range, returns NULL.
+  const TestInfo* GetTestInfo(int i) const;
+
+  // Returns the TestResult that holds test properties recorded during
+  // execution of SetUpTestSuite and TearDownTestSuite.
+  const TestResult& ad_hoc_test_result() const { return ad_hoc_test_result_; }
+
+ private:
+  friend class Test;
+  friend class internal::UnitTestImpl;
+
+  // Gets the (mutable) vector of TestInfos in this TestSuite.
+  std::vector<TestInfo*>& test_info_list() { return test_info_list_; }
+
+  // Gets the (immutable) vector of TestInfos in this TestSuite.
+  const std::vector<TestInfo*>& test_info_list() const {
+    return test_info_list_;
+  }
+
+  // Returns the i-th test among all the tests. i can range from 0 to
+  // total_test_count() - 1. If i is not in that range, returns NULL.
+  TestInfo* GetMutableTestInfo(int i);
+
+  // Sets the should_run member.
+  void set_should_run(bool should) { should_run_ = should; }
+
+  // Adds a TestInfo to this test suite.  Will delete the TestInfo upon
+  // destruction of the TestSuite object.
+  void AddTestInfo(TestInfo * test_info);
+
+  // Clears the results of all tests in this test suite.
+  void ClearResult();
+
+  // Clears the results of all tests in the given test suite.
+  static void ClearTestSuiteResult(TestSuite* test_suite) {
+    test_suite->ClearResult();
+  }
+
+  // Runs every test in this TestSuite.
+  void Run();
+
+  // Skips the execution of tests under this TestSuite
+  void Skip();
+
+  // Runs SetUpTestSuite() for this TestSuite.  This wrapper is needed
+  // for catching exceptions thrown from SetUpTestSuite().
+  void RunSetUpTestSuite() {
+    if (set_up_tc_ != nullptr) {
+      (*set_up_tc_)();
+    }
+  }
+
+  // Runs TearDownTestSuite() for this TestSuite.  This wrapper is
+  // needed for catching exceptions thrown from TearDownTestSuite().
+  void RunTearDownTestSuite() {
+    if (tear_down_tc_ != nullptr) {
+      (*tear_down_tc_)();
+    }
+  }
+
+  // Returns true if and only if test passed.
+  static bool TestPassed(const TestInfo* test_info) {
+    return test_info->should_run() && test_info->result()->Passed();
+  }
+
+  // Returns true if and only if test skipped.
+  static bool TestSkipped(const TestInfo* test_info) {
+    return test_info->should_run() && test_info->result()->Skipped();
+  }
+
+  // Returns true if and only if test failed.
+  static bool TestFailed(const TestInfo* test_info) {
+    return test_info->should_run() && test_info->result()->Failed();
+  }
+
+  // Returns true if and only if the test is disabled and will be reported in
+  // the XML report.
+  static bool TestReportableDisabled(const TestInfo* test_info) {
+    return test_info->is_reportable() && test_info->is_disabled_;
+  }
+
+  // Returns true if and only if test is disabled.
+  static bool TestDisabled(const TestInfo* test_info) {
+    return test_info->is_disabled_;
+  }
+
+  // Returns true if and only if this test will appear in the XML report.
+  static bool TestReportable(const TestInfo* test_info) {
+    return test_info->is_reportable();
+  }
+
+  // Returns true if the given test should run.
+  static bool ShouldRunTest(const TestInfo* test_info) {
+    return test_info->should_run();
+  }
+
+  // Shuffles the tests in this test suite.
+  void ShuffleTests(internal::Random* random);
+
+  // Restores the test order to before the first shuffle.
+  void UnshuffleTests();
+
+  // Name of the test suite.
+  std::string name_;
+  // Name of the parameter type, or NULL if this is not a typed or a
+  // type-parameterized test.
+  const std::unique_ptr<const ::std::string> type_param_;
+  // The vector of TestInfos in their original order.  It owns the
+  // elements in the vector.
+  std::vector<TestInfo*> test_info_list_;
+  // Provides a level of indirection for the test list to allow easy
+  // shuffling and restoring the test order.  The i-th element in this
+  // vector is the index of the i-th test in the shuffled test list.
+  std::vector<int> test_indices_;
+  // Pointer to the function that sets up the test suite.
+  internal::SetUpTestSuiteFunc set_up_tc_;
+  // Pointer to the function that tears down the test suite.
+  internal::TearDownTestSuiteFunc tear_down_tc_;
+  // True if and only if any test in this test suite should run.
+  bool should_run_;
+  // The start time, in milliseconds since UNIX Epoch.
+  TimeInMillis start_timestamp_;
+  // Elapsed time, in milliseconds.
+  TimeInMillis elapsed_time_;
+  // Holds test properties recorded during execution of SetUpTestSuite and
+  // TearDownTestSuite.
+  TestResult ad_hoc_test_result_;
+
+  // We disallow copying TestSuites.
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestSuite);
+};
+
+// An Environment object is capable of setting up and tearing down an
+// environment.  You should subclass this to define your own
+// environment(s).
+//
+// An Environment object does the set-up and tear-down in virtual
+// methods SetUp() and TearDown() instead of the constructor and the
+// destructor, as:
+//
+//   1. You cannot safely throw from a destructor.  This is a problem
+//      as in some cases Google Test is used where exceptions are enabled, and
+//      we may want to implement ASSERT_* using exceptions where they are
+//      available.
+//   2. You cannot use ASSERT_* directly in a constructor or
+//      destructor.
+class Environment {
+ public:
+  // The d'tor is virtual as we need to subclass Environment.
+  virtual ~Environment() {}
+
+  // Override this to define how to set up the environment.
+  virtual void SetUp() {}
+
+  // Override this to define how to tear down the environment.
+  virtual void TearDown() {}
+ private:
+  // If you see an error about overriding the following function or
+  // about it being private, you have mis-spelled SetUp() as Setup().
+  struct Setup_should_be_spelled_SetUp {};
+  virtual Setup_should_be_spelled_SetUp* Setup() { return nullptr; }
+};
+
+#if GTEST_HAS_EXCEPTIONS
+
+// Exception which can be thrown from TestEventListener::OnTestPartResult.
+class GTEST_API_ AssertionException
+    : public internal::GoogleTestFailureException {
+ public:
+  explicit AssertionException(const TestPartResult& result)
+      : GoogleTestFailureException(result) {}
+};
+
+#endif  // GTEST_HAS_EXCEPTIONS
+
+// The interface for tracing execution of tests. The methods are organized in
+// the order the corresponding events are fired.
+class TestEventListener {
+ public:
+  virtual ~TestEventListener() {}
+
+  // Fired before any test activity starts.
+  virtual void OnTestProgramStart(const UnitTest& unit_test) = 0;
+
+  // Fired before each iteration of tests starts.  There may be more than
+  // one iteration if GTEST_FLAG(repeat) is set. iteration is the iteration
+  // index, starting from 0.
+  virtual void OnTestIterationStart(const UnitTest& unit_test,
+                                    int iteration) = 0;
+
+  // Fired before environment set-up for each iteration of tests starts.
+  virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test) = 0;
+
+  // Fired after environment set-up for each iteration of tests ends.
+  virtual void OnEnvironmentsSetUpEnd(const UnitTest& unit_test) = 0;
+
+  // Fired before the test suite starts.
+  virtual void OnTestSuiteStart(const TestSuite& /*test_suite*/) {}
+
+  //  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  virtual void OnTestCaseStart(const TestCase& /*test_case*/) {}
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  // Fired before the test starts.
+  virtual void OnTestStart(const TestInfo& test_info) = 0;
+
+  // Fired after a failed assertion or a SUCCEED() invocation.
+  // If you want to throw an exception from this function to skip to the next
+  // TEST, it must be AssertionException defined above, or inherited from it.
+  virtual void OnTestPartResult(const TestPartResult& test_part_result) = 0;
+
+  // Fired after the test ends.
+  virtual void OnTestEnd(const TestInfo& test_info) = 0;
+
+  // Fired after the test suite ends.
+  virtual void OnTestSuiteEnd(const TestSuite& /*test_suite*/) {}
+
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  virtual void OnTestCaseEnd(const TestCase& /*test_case*/) {}
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  // Fired before environment tear-down for each iteration of tests starts.
+  virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test) = 0;
+
+  // Fired after environment tear-down for each iteration of tests ends.
+  virtual void OnEnvironmentsTearDownEnd(const UnitTest& unit_test) = 0;
+
+  // Fired after each iteration of tests finishes.
+  virtual void OnTestIterationEnd(const UnitTest& unit_test,
+                                  int iteration) = 0;
+
+  // Fired after all test activities have ended.
+  virtual void OnTestProgramEnd(const UnitTest& unit_test) = 0;
+};
+
+// The convenience class for users who need to override just one or two
+// methods and are not concerned that a possible change to a signature of
+// the methods they override will not be caught during the build.  For
+// comments about each method please see the definition of TestEventListener
+// above.
+class EmptyTestEventListener : public TestEventListener {
+ public:
+  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
+  void OnTestIterationStart(const UnitTest& /*unit_test*/,
+                            int /*iteration*/) override {}
+  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {}
+  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
+  void OnTestSuiteStart(const TestSuite& /*test_suite*/) override {}
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  void OnTestCaseStart(const TestCase& /*test_case*/) override {}
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  void OnTestStart(const TestInfo& /*test_info*/) override {}
+  void OnTestPartResult(const TestPartResult& /*test_part_result*/) override {}
+  void OnTestEnd(const TestInfo& /*test_info*/) override {}
+  void OnTestSuiteEnd(const TestSuite& /*test_suite*/) override {}
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  void OnTestCaseEnd(const TestCase& /*test_case*/) override {}
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {}
+  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
+  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
+                          int /*iteration*/) override {}
+  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
+};
+
+// TestEventListeners lets users add listeners to track events in Google Test.
+class GTEST_API_ TestEventListeners {
+ public:
+  TestEventListeners();
+  ~TestEventListeners();
+
+  // Appends an event listener to the end of the list. Google Test assumes
+  // the ownership of the listener (i.e. it will delete the listener when
+  // the test program finishes).
+  void Append(TestEventListener* listener);
+
+  // Removes the given event listener from the list and returns it.  It then
+  // becomes the caller's responsibility to delete the listener. Returns
+  // NULL if the listener is not found in the list.
+  TestEventListener* Release(TestEventListener* listener);
+
+  // Returns the standard listener responsible for the default console
+  // output.  Can be removed from the listeners list to shut down default
+  // console output.  Note that removing this object from the listener list
+  // with Release transfers its ownership to the caller and makes this
+  // function return NULL the next time.
+  TestEventListener* default_result_printer() const {
+    return default_result_printer_;
+  }
+
+  // Returns the standard listener responsible for the default XML output
+  // controlled by the --gtest_output=xml flag.  Can be removed from the
+  // listeners list by users who want to shut down the default XML output
+  // controlled by this flag and substitute it with custom one.  Note that
+  // removing this object from the listener list with Release transfers its
+  // ownership to the caller and makes this function return NULL the next
+  // time.
+  TestEventListener* default_xml_generator() const {
+    return default_xml_generator_;
+  }
+
+ private:
+  friend class TestSuite;
+  friend class TestInfo;
+  friend class internal::DefaultGlobalTestPartResultReporter;
+  friend class internal::NoExecDeathTest;
+  friend class internal::TestEventListenersAccessor;
+  friend class internal::UnitTestImpl;
+
+  // Returns repeater that broadcasts the TestEventListener events to all
+  // subscribers.
+  TestEventListener* repeater();
+
+  // Sets the default_result_printer attribute to the provided listener.
+  // The listener is also added to the listener list and previous
+  // default_result_printer is removed from it and deleted. The listener can
+  // also be NULL in which case it will not be added to the list. Does
+  // nothing if the previous and the current listener objects are the same.
+  void SetDefaultResultPrinter(TestEventListener* listener);
+
+  // Sets the default_xml_generator attribute to the provided listener.  The
+  // listener is also added to the listener list and previous
+  // default_xml_generator is removed from it and deleted. The listener can
+  // also be NULL in which case it will not be added to the list. Does
+  // nothing if the previous and the current listener objects are the same.
+  void SetDefaultXmlGenerator(TestEventListener* listener);
+
+  // Controls whether events will be forwarded by the repeater to the
+  // listeners in the list.
+  bool EventForwardingEnabled() const;
+  void SuppressEventForwarding();
+
+  // The actual list of listeners.
+  internal::TestEventRepeater* repeater_;
+  // Listener responsible for the standard result output.
+  TestEventListener* default_result_printer_;
+  // Listener responsible for the creation of the XML output file.
+  TestEventListener* default_xml_generator_;
+
+  // We disallow copying TestEventListeners.
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventListeners);
+};
+
+// A UnitTest consists of a vector of TestSuites.
+//
+// This is a singleton class.  The only instance of UnitTest is
+// created when UnitTest::GetInstance() is first called.  This
+// instance is never deleted.
+//
+// UnitTest is not copyable.
+//
+// This class is thread-safe as long as the methods are called
+// according to their specification.
+class GTEST_API_ UnitTest {
+ public:
+  // Gets the singleton UnitTest object.  The first time this method
+  // is called, a UnitTest object is constructed and returned.
+  // Consecutive calls will return the same object.
+  static UnitTest* GetInstance();
+
+  // Runs all tests in this UnitTest object and prints the result.
+  // Returns 0 if successful, or 1 otherwise.
+  //
+  // This method can only be called from the main thread.
+  //
+  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+  int Run() GTEST_MUST_USE_RESULT_;
+
+  // Returns the working directory when the first TEST() or TEST_F()
+  // was executed.  The UnitTest object owns the string.
+  const char* original_working_dir() const;
+
+  // Returns the TestSuite object for the test that's currently running,
+  // or NULL if no test is running.
+  const TestSuite* current_test_suite() const GTEST_LOCK_EXCLUDED_(mutex_);
+
+// Legacy API is still available but deprecated
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  const TestCase* current_test_case() const GTEST_LOCK_EXCLUDED_(mutex_);
+#endif
+
+  // Returns the TestInfo object for the test that's currently running,
+  // or NULL if no test is running.
+  const TestInfo* current_test_info() const
+      GTEST_LOCK_EXCLUDED_(mutex_);
+
+  // Returns the random seed used at the start of the current test run.
+  int random_seed() const;
+
+  // Returns the ParameterizedTestSuiteRegistry object used to keep track of
+  // value-parameterized tests and instantiate and register them.
+  //
+  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+  internal::ParameterizedTestSuiteRegistry& parameterized_test_registry()
+      GTEST_LOCK_EXCLUDED_(mutex_);
+
+  // Gets the number of successful test suites.
+  int successful_test_suite_count() const;
+
+  // Gets the number of failed test suites.
+  int failed_test_suite_count() const;
+
+  // Gets the number of all test suites.
+  int total_test_suite_count() const;
+
+  // Gets the number of all test suites that contain at least one test
+  // that should run.
+  int test_suite_to_run_count() const;
+
+  //  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  int successful_test_case_count() const;
+  int failed_test_case_count() const;
+  int total_test_case_count() const;
+  int test_case_to_run_count() const;
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  // Gets the number of successful tests.
+  int successful_test_count() const;
+
+  // Gets the number of skipped tests.
+  int skipped_test_count() const;
+
+  // Gets the number of failed tests.
+  int failed_test_count() const;
+
+  // Gets the number of disabled tests that will be reported in the XML report.
+  int reportable_disabled_test_count() const;
+
+  // Gets the number of disabled tests.
+  int disabled_test_count() const;
+
+  // Gets the number of tests to be printed in the XML report.
+  int reportable_test_count() const;
+
+  // Gets the number of all tests.
+  int total_test_count() const;
+
+  // Gets the number of tests that should run.
+  int test_to_run_count() const;
+
+  // Gets the time of the test program start, in ms from the start of the
+  // UNIX epoch.
+  TimeInMillis start_timestamp() const;
+
+  // Gets the elapsed time, in milliseconds.
+  TimeInMillis elapsed_time() const;
+
+  // Returns true if and only if the unit test passed (i.e. all test suites
+  // passed).
+  bool Passed() const;
+
+  // Returns true if and only if the unit test failed (i.e. some test suite
+  // failed or something outside of all tests failed).
+  bool Failed() const;
+
+  // Gets the i-th test suite among all the test suites. i can range from 0 to
+  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
+  const TestSuite* GetTestSuite(int i) const;
+
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+  const TestCase* GetTestCase(int i) const;
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
+
+  // Returns the TestResult containing information on test failures and
+  // properties logged outside of individual test suites.
+  const TestResult& ad_hoc_test_result() const;
+
+  // Returns the list of event listeners that can be used to track events
+  // inside Google Test.
+  TestEventListeners& listeners();
+
+ private:
+  // Registers and returns a global test environment.  When a test
+  // program is run, all global test environments will be set-up in
+  // the order they were registered.  After all tests in the program
+  // have finished, all global test environments will be torn-down in
+  // the *reverse* order they were registered.
+  //
+  // The UnitTest object takes ownership of the given environment.
+  //
+  // This method can only be called from the main thread.
+  Environment* AddEnvironment(Environment* env);
+
+  // Adds a TestPartResult to the current TestResult object.  All
+  // Google Test assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc)
+  // eventually call this to report their results.  The user code
+  // should use the assertion macros instead of calling this directly.
+  void AddTestPartResult(TestPartResult::Type result_type,
+                         const char* file_name,
+                         int line_number,
+                         const std::string& message,
+                         const std::string& os_stack_trace)
+      GTEST_LOCK_EXCLUDED_(mutex_);
+
+  // Adds a TestProperty to the current TestResult object when invoked from
+  // inside a test, to current TestSuite's ad_hoc_test_result_ when invoked
+  // from SetUpTestSuite or TearDownTestSuite, or to the global property set
+  // when invoked elsewhere.  If the result already contains a property with
+  // the same key, the value will be updated.
+  void RecordProperty(const std::string& key, const std::string& value);
+
+  // Gets the i-th test suite among all the test suites. i can range from 0 to
+  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
+  TestSuite* GetMutableTestSuite(int i);
+
+  // Accessors for the implementation object.
+  internal::UnitTestImpl* impl() { return impl_; }
+  const internal::UnitTestImpl* impl() const { return impl_; }
+
+  // These classes and functions are friends as they need to access private
+  // members of UnitTest.
+  friend class ScopedTrace;
+  friend class Test;
+  friend class internal::AssertHelper;
+  friend class internal::StreamingListenerTest;
+  friend class internal::UnitTestRecordPropertyTestHelper;
+  friend Environment* AddGlobalTestEnvironment(Environment* env);
+  friend std::set<std::string>* internal::GetIgnoredParameterizedTestSuites();
+  friend internal::UnitTestImpl* internal::GetUnitTestImpl();
+  friend void internal::ReportFailureInUnknownLocation(
+      TestPartResult::Type result_type,
+      const std::string& message);
+
+  // Creates an empty UnitTest.
+  UnitTest();
+
+  // D'tor
+  virtual ~UnitTest();
+
+  // Pushes a trace defined by SCOPED_TRACE() on to the per-thread
+  // Google Test trace stack.
+  void PushGTestTrace(const internal::TraceInfo& trace)
+      GTEST_LOCK_EXCLUDED_(mutex_);
+
+  // Pops a trace from the per-thread Google Test trace stack.
+  void PopGTestTrace()
+      GTEST_LOCK_EXCLUDED_(mutex_);
+
+  // Protects mutable state in *impl_.  This is mutable as some const
+  // methods need to lock it too.
+  mutable internal::Mutex mutex_;
+
+  // Opaque implementation object.  This field is never changed once
+  // the object is constructed.  We don't mark it as const here, as
+  // doing so will cause a warning in the constructor of UnitTest.
+  // Mutable state in *impl_ is protected by mutex_.
+  internal::UnitTestImpl* impl_;
+
+  // We disallow copying UnitTest.
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(UnitTest);
+};
+
+// A convenient wrapper for adding an environment for the test
+// program.
+//
+// You should call this before RUN_ALL_TESTS() is called, probably in
+// main().  If you use gtest_main, you need to call this before main()
+// starts for it to take effect.  For example, you can define a global
+// variable like this:
+//
+//   testing::Environment* const foo_env =
+//       testing::AddGlobalTestEnvironment(new FooEnvironment);
+//
+// However, we strongly recommend you to write your own main() and
+// call AddGlobalTestEnvironment() there, as relying on initialization
+// of global variables makes the code harder to read and may cause
+// problems when you register multiple environments from different
+// translation units and the environments have dependencies among them
+// (remember that the compiler doesn't guarantee the order in which
+// global variables from different translation units are initialized).
+inline Environment* AddGlobalTestEnvironment(Environment* env) {
+  return UnitTest::GetInstance()->AddEnvironment(env);
+}
+
+// Initializes Google Test.  This must be called before calling
+// RUN_ALL_TESTS().  In particular, it parses a command line for the
+// flags that Google Test recognizes.  Whenever a Google Test flag is
+// seen, it is removed from argv, and *argc is decremented.
+//
+// No value is returned.  Instead, the Google Test flag variables are
+// updated.
+//
+// Calling the function for the second time has no user-visible effect.
+GTEST_API_ void InitGoogleTest(int* argc, char** argv);
+
+// This overloaded version can be used in Windows programs compiled in
+// UNICODE mode.
+GTEST_API_ void InitGoogleTest(int* argc, wchar_t** argv);
+
+// This overloaded version can be used on Arduino/embedded platforms where
+// there is no argc/argv.
+GTEST_API_ void InitGoogleTest();
+
+namespace internal {
+
+// Separate the error generating code from the code path to reduce the stack
+// frame size of CmpHelperEQ. This helps reduce the overhead of some sanitizers
+// when calling EXPECT_* in a tight loop.
+template <typename T1, typename T2>
+AssertionResult CmpHelperEQFailure(const char* lhs_expression,
+                                   const char* rhs_expression,
+                                   const T1& lhs, const T2& rhs) {
+  return EqFailure(lhs_expression,
+                   rhs_expression,
+                   FormatForComparisonFailureMessage(lhs, rhs),
+                   FormatForComparisonFailureMessage(rhs, lhs),
+                   false);
+}
+
+// This block of code defines operator==/!=
+// to block lexical scope lookup.
+// It prevents using invalid operator==/!= defined at namespace scope.
+struct faketype {};
+inline bool operator==(faketype, faketype) { return true; }
+inline bool operator!=(faketype, faketype) { return false; }
+
+// The helper function for {ASSERT|EXPECT}_EQ.
+template <typename T1, typename T2>
+AssertionResult CmpHelperEQ(const char* lhs_expression,
+                            const char* rhs_expression,
+                            const T1& lhs,
+                            const T2& rhs) {
+  if (lhs == rhs) {
+    return AssertionSuccess();
+  }
+
+  return CmpHelperEQFailure(lhs_expression, rhs_expression, lhs, rhs);
+}
+
+class EqHelper {
+ public:
+  // This templatized version is for the general case.
+  template <
+      typename T1, typename T2,
+      // Disable this overload for cases where one argument is a pointer
+      // and the other is the null pointer constant.
+      typename std::enable_if<!std::is_integral<T1>::value ||
+                              !std::is_pointer<T2>::value>::type* = nullptr>
+  static AssertionResult Compare(const char* lhs_expression,
+                                 const char* rhs_expression, const T1& lhs,
+                                 const T2& rhs) {
+    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
+  }
+
+  // With this overloaded version, we allow anonymous enums to be used
+  // in {ASSERT|EXPECT}_EQ when compiled with gcc 4, as anonymous
+  // enums can be implicitly cast to BiggestInt.
+  //
+  // Even though its body looks the same as the above version, we
+  // cannot merge the two, as it will make anonymous enums unhappy.
+  static AssertionResult Compare(const char* lhs_expression,
+                                 const char* rhs_expression,
+                                 BiggestInt lhs,
+                                 BiggestInt rhs) {
+    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
+  }
+
+  template <typename T>
+  static AssertionResult Compare(
+      const char* lhs_expression, const char* rhs_expression,
+      // Handle cases where '0' is used as a null pointer literal.
+      std::nullptr_t /* lhs */, T* rhs) {
+    // We already know that 'lhs' is a null pointer.
+    return CmpHelperEQ(lhs_expression, rhs_expression, static_cast<T*>(nullptr),
+                       rhs);
+  }
+};
+
+// Separate the error generating code from the code path to reduce the stack
+// frame size of CmpHelperOP. This helps reduce the overhead of some sanitizers
+// when calling EXPECT_OP in a tight loop.
+template <typename T1, typename T2>
+AssertionResult CmpHelperOpFailure(const char* expr1, const char* expr2,
+                                   const T1& val1, const T2& val2,
+                                   const char* op) {
+  return AssertionFailure()
+         << "Expected: (" << expr1 << ") " << op << " (" << expr2
+         << "), actual: " << FormatForComparisonFailureMessage(val1, val2)
+         << " vs " << FormatForComparisonFailureMessage(val2, val1);
+}
+
+// A macro for implementing the helper functions needed to implement
+// ASSERT_?? and EXPECT_??.  It is here just to avoid copy-and-paste
+// of similar code.
+//
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+
+#define GTEST_IMPL_CMP_HELPER_(op_name, op)\
+template <typename T1, typename T2>\
+AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
+                                   const T1& val1, const T2& val2) {\
+  if (val1 op val2) {\
+    return AssertionSuccess();\
+  } else {\
+    return CmpHelperOpFailure(expr1, expr2, val1, val2, #op);\
+  }\
+}
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+
+// Implements the helper function for {ASSERT|EXPECT}_NE
+GTEST_IMPL_CMP_HELPER_(NE, !=)
+// Implements the helper function for {ASSERT|EXPECT}_LE
+GTEST_IMPL_CMP_HELPER_(LE, <=)
+// Implements the helper function for {ASSERT|EXPECT}_LT
+GTEST_IMPL_CMP_HELPER_(LT, <)
+// Implements the helper function for {ASSERT|EXPECT}_GE
+GTEST_IMPL_CMP_HELPER_(GE, >=)
+// Implements the helper function for {ASSERT|EXPECT}_GT
+GTEST_IMPL_CMP_HELPER_(GT, >)
+
+#undef GTEST_IMPL_CMP_HELPER_
+
+// The helper function for {ASSERT|EXPECT}_STREQ.
+//
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
+                                          const char* s2_expression,
+                                          const char* s1,
+                                          const char* s2);
+
+// The helper function for {ASSERT|EXPECT}_STRCASEEQ.
+//
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+GTEST_API_ AssertionResult CmpHelperSTRCASEEQ(const char* s1_expression,
+                                              const char* s2_expression,
+                                              const char* s1,
+                                              const char* s2);
+
+// The helper function for {ASSERT|EXPECT}_STRNE.
+//
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
+                                          const char* s2_expression,
+                                          const char* s1,
+                                          const char* s2);
+
+// The helper function for {ASSERT|EXPECT}_STRCASENE.
+//
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+GTEST_API_ AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
+                                              const char* s2_expression,
+                                              const char* s1,
+                                              const char* s2);
+
+
+// Helper function for *_STREQ on wide strings.
+//
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
+                                          const char* s2_expression,
+                                          const wchar_t* s1,
+                                          const wchar_t* s2);
+
+// Helper function for *_STRNE on wide strings.
+//
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
+                                          const char* s2_expression,
+                                          const wchar_t* s1,
+                                          const wchar_t* s2);
+
+}  // namespace internal
+
+// IsSubstring() and IsNotSubstring() are intended to be used as the
+// first argument to {EXPECT,ASSERT}_PRED_FORMAT2(), not by
+// themselves.  They check whether needle is a substring of haystack
+// (NULL is considered a substring of itself only), and return an
+// appropriate error message when they fail.
+//
+// The {needle,haystack}_expr arguments are the stringified
+// expressions that generated the two real arguments.
+GTEST_API_ AssertionResult IsSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const char* needle, const char* haystack);
+GTEST_API_ AssertionResult IsSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const wchar_t* needle, const wchar_t* haystack);
+GTEST_API_ AssertionResult IsNotSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const char* needle, const char* haystack);
+GTEST_API_ AssertionResult IsNotSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const wchar_t* needle, const wchar_t* haystack);
+GTEST_API_ AssertionResult IsSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const ::std::string& needle, const ::std::string& haystack);
+GTEST_API_ AssertionResult IsNotSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const ::std::string& needle, const ::std::string& haystack);
+
+#if GTEST_HAS_STD_WSTRING
+GTEST_API_ AssertionResult IsSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const ::std::wstring& needle, const ::std::wstring& haystack);
+GTEST_API_ AssertionResult IsNotSubstring(
+    const char* needle_expr, const char* haystack_expr,
+    const ::std::wstring& needle, const ::std::wstring& haystack);
+#endif  // GTEST_HAS_STD_WSTRING
+
+namespace internal {
+
+// Helper template function for comparing floating-points.
+//
+// Template parameter:
+//
+//   RawType: the raw floating-point type (either float or double)
+//
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+template <typename RawType>
+AssertionResult CmpHelperFloatingPointEQ(const char* lhs_expression,
+                                         const char* rhs_expression,
+                                         RawType lhs_value,
+                                         RawType rhs_value) {
+  const FloatingPoint<RawType> lhs(lhs_value), rhs(rhs_value);
+
+  if (lhs.AlmostEquals(rhs)) {
+    return AssertionSuccess();
+  }
+
+  ::std::stringstream lhs_ss;
+  lhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
+         << lhs_value;
+
+  ::std::stringstream rhs_ss;
+  rhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
+         << rhs_value;
+
+  return EqFailure(lhs_expression,
+                   rhs_expression,
+                   StringStreamToString(&lhs_ss),
+                   StringStreamToString(&rhs_ss),
+                   false);
+}
+
+// Helper function for implementing ASSERT_NEAR.
+//
+// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
+GTEST_API_ AssertionResult DoubleNearPredFormat(const char* expr1,
+                                                const char* expr2,
+                                                const char* abs_error_expr,
+                                                double val1,
+                                                double val2,
+                                                double abs_error);
+
+// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
+// A class that enables one to stream messages to assertion macros
+class GTEST_API_ AssertHelper {
+ public:
+  // Constructor.
+  AssertHelper(TestPartResult::Type type,
+               const char* file,
+               int line,
+               const char* message);
+  ~AssertHelper();
+
+  // Message assignment is a semantic trick to enable assertion
+  // streaming; see the GTEST_MESSAGE_ macro below.
+  void operator=(const Message& message) const;
+
+ private:
+  // We put our data in a struct so that the size of the AssertHelper class can
+  // be as small as possible.  This is important because gcc is incapable of
+  // re-using stack space even for temporary variables, so every EXPECT_EQ
+  // reserves stack space for another AssertHelper.
+  struct AssertHelperData {
+    AssertHelperData(TestPartResult::Type t,
+                     const char* srcfile,
+                     int line_num,
+                     const char* msg)
+        : type(t), file(srcfile), line(line_num), message(msg) { }
+
+    TestPartResult::Type const type;
+    const char* const file;
+    int const line;
+    std::string const message;
+
+   private:
+    GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelperData);
+  };
+
+  AssertHelperData* const data_;
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelper);
+};
+
+}  // namespace internal
+
+// The pure interface class that all value-parameterized tests inherit from.
+// A value-parameterized class must inherit from both ::testing::Test and
+// ::testing::WithParamInterface. In most cases that just means inheriting
+// from ::testing::TestWithParam, but more complicated test hierarchies
+// may need to inherit from Test and WithParamInterface at different levels.
+//
+// This interface has support for accessing the test parameter value via
+// the GetParam() method.
+//
+// Use it with one of the parameter generator defining functions, like Range(),
+// Values(), ValuesIn(), Bool(), and Combine().
+//
+// class FooTest : public ::testing::TestWithParam<int> {
+//  protected:
+//   FooTest() {
+//     // Can use GetParam() here.
+//   }
+//   ~FooTest() override {
+//     // Can use GetParam() here.
+//   }
+//   void SetUp() override {
+//     // Can use GetParam() here.
+//   }
+//   void TearDown override {
+//     // Can use GetParam() here.
+//   }
+// };
+// TEST_P(FooTest, DoesBar) {
+//   // Can use GetParam() method here.
+//   Foo foo;
+//   ASSERT_TRUE(foo.DoesBar(GetParam()));
+// }
+// INSTANTIATE_TEST_SUITE_P(OneToTenRange, FooTest, ::testing::Range(1, 10));
+
+template <typename T>
+class WithParamInterface {
+ public:
+  typedef T ParamType;
+  virtual ~WithParamInterface() {}
+
+  // The current parameter value. Is also available in the test fixture's
+  // constructor.
+  static const ParamType& GetParam() {
+    GTEST_CHECK_(parameter_ != nullptr)
+        << "GetParam() can only be called inside a value-parameterized test "
+        << "-- did you intend to write TEST_P instead of TEST_F?";
+    return *parameter_;
+  }
+
+ private:
+  // Sets parameter value. The caller is responsible for making sure the value
+  // remains alive and unchanged throughout the current test.
+  static void SetParam(const ParamType* parameter) {
+    parameter_ = parameter;
+  }
+
+  // Static value used for accessing parameter during a test lifetime.
+  static const ParamType* parameter_;
+
+  // TestClass must be a subclass of WithParamInterface<T> and Test.
+  template <class TestClass> friend class internal::ParameterizedTestFactory;
+};
+
+template <typename T>
+const T* WithParamInterface<T>::parameter_ = nullptr;
+
+// Most value-parameterized classes can ignore the existence of
+// WithParamInterface, and can just inherit from ::testing::TestWithParam.
+
+template <typename T>
+class TestWithParam : public Test, public WithParamInterface<T> {
+};
+
+// Macros for indicating success/failure in test code.
+
+// Skips test in runtime.
+// Skipping test aborts current function.
+// Skipped tests are neither successful nor failed.
+#define GTEST_SKIP() GTEST_SKIP_("")
+
+// ADD_FAILURE unconditionally adds a failure to the current test.
+// SUCCEED generates a success - it doesn't automatically make the
+// current test successful, as a test is only successful when it has
+// no failure.
+//
+// EXPECT_* verifies that a certain condition is satisfied.  If not,
+// it behaves like ADD_FAILURE.  In particular:
+//
+//   EXPECT_TRUE  verifies that a Boolean condition is true.
+//   EXPECT_FALSE verifies that a Boolean condition is false.
+//
+// FAIL and ASSERT_* are similar to ADD_FAILURE and EXPECT_*, except
+// that they will also abort the current function on failure.  People
+// usually want the fail-fast behavior of FAIL and ASSERT_*, but those
+// writing data-driven tests often find themselves using ADD_FAILURE
+// and EXPECT_* more.
+
+// Generates a nonfatal failure with a generic message.
+#define ADD_FAILURE() GTEST_NONFATAL_FAILURE_("Failed")
+
+// Generates a nonfatal failure at the given source file location with
+// a generic message.
+#define ADD_FAILURE_AT(file, line) \
+  GTEST_MESSAGE_AT_(file, line, "Failed", \
+                    ::testing::TestPartResult::kNonFatalFailure)
+
+// Generates a fatal failure with a generic message.
+#define GTEST_FAIL() GTEST_FATAL_FAILURE_("Failed")
+
+// Like GTEST_FAIL(), but at the given source file location.
+#define GTEST_FAIL_AT(file, line)         \
+  GTEST_MESSAGE_AT_(file, line, "Failed", \
+                    ::testing::TestPartResult::kFatalFailure)
+
+// Define this macro to 1 to omit the definition of FAIL(), which is a
+// generic name and clashes with some other libraries.
+#if !GTEST_DONT_DEFINE_FAIL
+# define FAIL() GTEST_FAIL()
+#endif
+
+// Generates a success with a generic message.
+#define GTEST_SUCCEED() GTEST_SUCCESS_("Succeeded")
+
+// Define this macro to 1 to omit the definition of SUCCEED(), which
+// is a generic name and clashes with some other libraries.
+#if !GTEST_DONT_DEFINE_SUCCEED
+# define SUCCEED() GTEST_SUCCEED()
+#endif
+
+// Macros for testing exceptions.
+//
+//    * {ASSERT|EXPECT}_THROW(statement, expected_exception):
+//         Tests that the statement throws the expected exception.
+//    * {ASSERT|EXPECT}_NO_THROW(statement):
+//         Tests that the statement doesn't throw any exception.
+//    * {ASSERT|EXPECT}_ANY_THROW(statement):
+//         Tests that the statement throws an exception.
+
+#define EXPECT_THROW(statement, expected_exception) \
+  GTEST_TEST_THROW_(statement, expected_exception, GTEST_NONFATAL_FAILURE_)
+#define EXPECT_NO_THROW(statement) \
+  GTEST_TEST_NO_THROW_(statement, GTEST_NONFATAL_FAILURE_)
+#define EXPECT_ANY_THROW(statement) \
+  GTEST_TEST_ANY_THROW_(statement, GTEST_NONFATAL_FAILURE_)
+#define ASSERT_THROW(statement, expected_exception) \
+  GTEST_TEST_THROW_(statement, expected_exception, GTEST_FATAL_FAILURE_)
+#define ASSERT_NO_THROW(statement) \
+  GTEST_TEST_NO_THROW_(statement, GTEST_FATAL_FAILURE_)
+#define ASSERT_ANY_THROW(statement) \
+  GTEST_TEST_ANY_THROW_(statement, GTEST_FATAL_FAILURE_)
+
+// Boolean assertions. Condition can be either a Boolean expression or an
+// AssertionResult. For more information on how to use AssertionResult with
+// these macros see comments on that class.
+#define GTEST_EXPECT_TRUE(condition) \
+  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
+                      GTEST_NONFATAL_FAILURE_)
+#define GTEST_EXPECT_FALSE(condition) \
+  GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
+                      GTEST_NONFATAL_FAILURE_)
+#define GTEST_ASSERT_TRUE(condition) \
+  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
+                      GTEST_FATAL_FAILURE_)
+#define GTEST_ASSERT_FALSE(condition) \
+  GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
+                      GTEST_FATAL_FAILURE_)
+
+// Define these macros to 1 to omit the definition of the corresponding
+// EXPECT or ASSERT, which clashes with some users' own code.
+
+#if !GTEST_DONT_DEFINE_EXPECT_TRUE
+#define EXPECT_TRUE(condition) GTEST_EXPECT_TRUE(condition)
+#endif
+
+#if !GTEST_DONT_DEFINE_EXPECT_FALSE
+#define EXPECT_FALSE(condition) GTEST_EXPECT_FALSE(condition)
+#endif
+
+#if !GTEST_DONT_DEFINE_ASSERT_TRUE
+#define ASSERT_TRUE(condition) GTEST_ASSERT_TRUE(condition)
+#endif
+
+#if !GTEST_DONT_DEFINE_ASSERT_FALSE
+#define ASSERT_FALSE(condition) GTEST_ASSERT_FALSE(condition)
+#endif
+
+// Macros for testing equalities and inequalities.
+//
+//    * {ASSERT|EXPECT}_EQ(v1, v2): Tests that v1 == v2
+//    * {ASSERT|EXPECT}_NE(v1, v2): Tests that v1 != v2
+//    * {ASSERT|EXPECT}_LT(v1, v2): Tests that v1 < v2
+//    * {ASSERT|EXPECT}_LE(v1, v2): Tests that v1 <= v2
+//    * {ASSERT|EXPECT}_GT(v1, v2): Tests that v1 > v2
+//    * {ASSERT|EXPECT}_GE(v1, v2): Tests that v1 >= v2
+//
+// When they are not, Google Test prints both the tested expressions and
+// their actual values.  The values must be compatible built-in types,
+// or you will get a compiler error.  By "compatible" we mean that the
+// values can be compared by the respective operator.
+//
+// Note:
+//
+//   1. It is possible to make a user-defined type work with
+//   {ASSERT|EXPECT}_??(), but that requires overloading the
+//   comparison operators and is thus discouraged by the Google C++
+//   Usage Guide.  Therefore, you are advised to use the
+//   {ASSERT|EXPECT}_TRUE() macro to assert that two objects are
+//   equal.
+//
+//   2. The {ASSERT|EXPECT}_??() macros do pointer comparisons on
+//   pointers (in particular, C strings).  Therefore, if you use it
+//   with two C strings, you are testing how their locations in memory
+//   are related, not how their content is related.  To compare two C
+//   strings by content, use {ASSERT|EXPECT}_STR*().
+//
+//   3. {ASSERT|EXPECT}_EQ(v1, v2) is preferred to
+//   {ASSERT|EXPECT}_TRUE(v1 == v2), as the former tells you
+//   what the actual value is when it fails, and similarly for the
+//   other comparisons.
+//
+//   4. Do not depend on the order in which {ASSERT|EXPECT}_??()
+//   evaluate their arguments, which is undefined.
+//
+//   5. These macros evaluate their arguments exactly once.
+//
+// Examples:
+//
+//   EXPECT_NE(Foo(), 5);
+//   EXPECT_EQ(a_pointer, NULL);
+//   ASSERT_LT(i, array_size);
+//   ASSERT_GT(records.size(), 0) << "There is no record left.";
+
+#define EXPECT_EQ(val1, val2) \
+  EXPECT_PRED_FORMAT2(::testing::internal::EqHelper::Compare, val1, val2)
+#define EXPECT_NE(val1, val2) \
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
+#define EXPECT_LE(val1, val2) \
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
+#define EXPECT_LT(val1, val2) \
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
+#define EXPECT_GE(val1, val2) \
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
+#define EXPECT_GT(val1, val2) \
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
+
+#define GTEST_ASSERT_EQ(val1, val2) \
+  ASSERT_PRED_FORMAT2(::testing::internal::EqHelper::Compare, val1, val2)
+#define GTEST_ASSERT_NE(val1, val2) \
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
+#define GTEST_ASSERT_LE(val1, val2) \
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
+#define GTEST_ASSERT_LT(val1, val2) \
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
+#define GTEST_ASSERT_GE(val1, val2) \
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
+#define GTEST_ASSERT_GT(val1, val2) \
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
+
+// Define macro GTEST_DONT_DEFINE_ASSERT_XY to 1 to omit the definition of
+// ASSERT_XY(), which clashes with some users' own code.
+
+#if !GTEST_DONT_DEFINE_ASSERT_EQ
+# define ASSERT_EQ(val1, val2) GTEST_ASSERT_EQ(val1, val2)
+#endif
+
+#if !GTEST_DONT_DEFINE_ASSERT_NE
+# define ASSERT_NE(val1, val2) GTEST_ASSERT_NE(val1, val2)
+#endif
+
+#if !GTEST_DONT_DEFINE_ASSERT_LE
+# define ASSERT_LE(val1, val2) GTEST_ASSERT_LE(val1, val2)
+#endif
+
+#if !GTEST_DONT_DEFINE_ASSERT_LT
+# define ASSERT_LT(val1, val2) GTEST_ASSERT_LT(val1, val2)
+#endif
+
+#if !GTEST_DONT_DEFINE_ASSERT_GE
+# define ASSERT_GE(val1, val2) GTEST_ASSERT_GE(val1, val2)
+#endif
+
+#if !GTEST_DONT_DEFINE_ASSERT_GT
+# define ASSERT_GT(val1, val2) GTEST_ASSERT_GT(val1, val2)
+#endif
+
+// C-string Comparisons.  All tests treat NULL and any non-NULL string
+// as different.  Two NULLs are equal.
+//
+//    * {ASSERT|EXPECT}_STREQ(s1, s2):     Tests that s1 == s2
+//    * {ASSERT|EXPECT}_STRNE(s1, s2):     Tests that s1 != s2
+//    * {ASSERT|EXPECT}_STRCASEEQ(s1, s2): Tests that s1 == s2, ignoring case
+//    * {ASSERT|EXPECT}_STRCASENE(s1, s2): Tests that s1 != s2, ignoring case
+//
+// For wide or narrow string objects, you can use the
+// {ASSERT|EXPECT}_??() macros.
+//
+// Don't depend on the order in which the arguments are evaluated,
+// which is undefined.
+//
+// These macros evaluate their arguments exactly once.
+
+#define EXPECT_STREQ(s1, s2) \
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
+#define EXPECT_STRNE(s1, s2) \
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
+#define EXPECT_STRCASEEQ(s1, s2) \
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
+#define EXPECT_STRCASENE(s1, s2)\
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
+
+#define ASSERT_STREQ(s1, s2) \
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
+#define ASSERT_STRNE(s1, s2) \
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
+#define ASSERT_STRCASEEQ(s1, s2) \
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
+#define ASSERT_STRCASENE(s1, s2)\
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
+
+// Macros for comparing floating-point numbers.
+//
+//    * {ASSERT|EXPECT}_FLOAT_EQ(val1, val2):
+//         Tests that two float values are almost equal.
+//    * {ASSERT|EXPECT}_DOUBLE_EQ(val1, val2):
+//         Tests that two double values are almost equal.
+//    * {ASSERT|EXPECT}_NEAR(v1, v2, abs_error):
+//         Tests that v1 and v2 are within the given distance to each other.
+//
+// Google Test uses ULP-based comparison to automatically pick a default
+// error bound that is appropriate for the operands.  See the
+// FloatingPoint template class in gtest-internal.h if you are
+// interested in the implementation details.
+
+#define EXPECT_FLOAT_EQ(val1, val2)\
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
+                      val1, val2)
+
+#define EXPECT_DOUBLE_EQ(val1, val2)\
+  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
+                      val1, val2)
+
+#define ASSERT_FLOAT_EQ(val1, val2)\
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
+                      val1, val2)
+
+#define ASSERT_DOUBLE_EQ(val1, val2)\
+  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
+                      val1, val2)
+
+#define EXPECT_NEAR(val1, val2, abs_error)\
+  EXPECT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
+                      val1, val2, abs_error)
+
+#define ASSERT_NEAR(val1, val2, abs_error)\
+  ASSERT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
+                      val1, val2, abs_error)
+
+// These predicate format functions work on floating-point values, and
+// can be used in {ASSERT|EXPECT}_PRED_FORMAT2*(), e.g.
+//
+//   EXPECT_PRED_FORMAT2(testing::DoubleLE, Foo(), 5.0);
+
+// Asserts that val1 is less than, or almost equal to, val2.  Fails
+// otherwise.  In particular, it fails if either val1 or val2 is NaN.
+GTEST_API_ AssertionResult FloatLE(const char* expr1, const char* expr2,
+                                   float val1, float val2);
+GTEST_API_ AssertionResult DoubleLE(const char* expr1, const char* expr2,
+                                    double val1, double val2);
+
+
+#if GTEST_OS_WINDOWS
+
+// Macros that test for HRESULT failure and success, these are only useful
+// on Windows, and rely on Windows SDK macros and APIs to compile.
+//
+//    * {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}(expr)
+//
+// When expr unexpectedly fails or succeeds, Google Test prints the
+// expected result and the actual result with both a human-readable
+// string representation of the error, if available, as well as the
+// hex result code.
+# define EXPECT_HRESULT_SUCCEEDED(expr) \
+    EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
+
+# define ASSERT_HRESULT_SUCCEEDED(expr) \
+    ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
+
+# define EXPECT_HRESULT_FAILED(expr) \
+    EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
+
+# define ASSERT_HRESULT_FAILED(expr) \
+    ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
+
+#endif  // GTEST_OS_WINDOWS
+
+// Macros that execute statement and check that it doesn't generate new fatal
+// failures in the current thread.
+//
+//   * {ASSERT|EXPECT}_NO_FATAL_FAILURE(statement);
+//
+// Examples:
+//
+//   EXPECT_NO_FATAL_FAILURE(Process());
+//   ASSERT_NO_FATAL_FAILURE(Process()) << "Process() failed";
+//
+#define ASSERT_NO_FATAL_FAILURE(statement) \
+    GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_FATAL_FAILURE_)
+#define EXPECT_NO_FATAL_FAILURE(statement) \
+    GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_NONFATAL_FAILURE_)
+
+// Causes a trace (including the given source file path and line number,
+// and the given message) to be included in every test failure message generated
+// by code in the scope of the lifetime of an instance of this class. The effect
+// is undone with the destruction of the instance.
+//
+// The message argument can be anything streamable to std::ostream.
+//
+// Example:
+//   testing::ScopedTrace trace("file.cc", 123, "message");
+//
+class GTEST_API_ ScopedTrace {
+ public:
+  // The c'tor pushes the given source file location and message onto
+  // a trace stack maintained by Google Test.
+
+  // Template version. Uses Message() to convert the values into strings.
+  // Slow, but flexible.
+  template <typename T>
+  ScopedTrace(const char* file, int line, const T& message) {
+    PushTrace(file, line, (Message() << message).GetString());
+  }
+
+  // Optimize for some known types.
+  ScopedTrace(const char* file, int line, const char* message) {
+    PushTrace(file, line, message ? message : "(null)");
+  }
+
+  ScopedTrace(const char* file, int line, const std::string& message) {
+    PushTrace(file, line, message);
+  }
+
+  // The d'tor pops the info pushed by the c'tor.
+  //
+  // Note that the d'tor is not virtual in order to be efficient.
+  // Don't inherit from ScopedTrace!
+  ~ScopedTrace();
+
+ private:
+  void PushTrace(const char* file, int line, std::string message);
+
+  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedTrace);
+} GTEST_ATTRIBUTE_UNUSED_;  // A ScopedTrace object does its job in its
+                            // c'tor and d'tor.  Therefore it doesn't
+                            // need to be used otherwise.
+
+// Causes a trace (including the source file path, the current line
+// number, and the given message) to be included in every test failure
+// message generated by code in the current scope.  The effect is
+// undone when the control leaves the current scope.
+//
+// The message argument can be anything streamable to std::ostream.
+//
+// In the implementation, we include the current line number as part
+// of the dummy variable name, thus allowing multiple SCOPED_TRACE()s
+// to appear in the same block - as long as they are on different
+// lines.
+//
+// Assuming that each thread maintains its own stack of traces.
+// Therefore, a SCOPED_TRACE() would (correctly) only affect the
+// assertions in its own thread.
+#define SCOPED_TRACE(message) \
+  ::testing::ScopedTrace GTEST_CONCAT_TOKEN_(gtest_trace_, __LINE__)(\
+    __FILE__, __LINE__, (message))
+
+// Compile-time assertion for type equality.
+// StaticAssertTypeEq<type1, type2>() compiles if and only if type1 and type2
+// are the same type.  The value it returns is not interesting.
+//
+// Instead of making StaticAssertTypeEq a class template, we make it a
+// function template that invokes a helper class template.  This
+// prevents a user from misusing StaticAssertTypeEq<T1, T2> by
+// defining objects of that type.
+//
+// CAVEAT:
+//
+// When used inside a method of a class template,
+// StaticAssertTypeEq<T1, T2>() is effective ONLY IF the method is
+// instantiated.  For example, given:
+//
+//   template <typename T> class Foo {
+//    public:
+//     void Bar() { testing::StaticAssertTypeEq<int, T>(); }
+//   };
+//
+// the code:
+//
+//   void Test1() { Foo<bool> foo; }
+//
+// will NOT generate a compiler error, as Foo<bool>::Bar() is never
+// actually instantiated.  Instead, you need:
+//
+//   void Test2() { Foo<bool> foo; foo.Bar(); }
+//
+// to cause a compiler error.
+template <typename T1, typename T2>
+constexpr bool StaticAssertTypeEq() noexcept {
+  static_assert(std::is_same<T1, T2>::value, "T1 and T2 are not the same type");
+  return true;
+}
+
+// Defines a test.
+//
+// The first parameter is the name of the test suite, and the second
+// parameter is the name of the test within the test suite.
+//
+// The convention is to end the test suite name with "Test".  For
+// example, a test suite for the Foo class can be named FooTest.
+//
+// Test code should appear between braces after an invocation of
+// this macro.  Example:
+//
+//   TEST(FooTest, InitializesCorrectly) {
+//     Foo foo;
+//     EXPECT_TRUE(foo.StatusIsOK());
+//   }
+
+// Note that we call GetTestTypeId() instead of GetTypeId<
+// ::testing::Test>() here to get the type ID of testing::Test.  This
+// is to work around a suspected linker bug when using Google Test as
+// a framework on Mac OS X.  The bug causes GetTypeId<
+// ::testing::Test>() to return different values depending on whether
+// the call is from the Google Test framework itself or from user test
+// code.  GetTestTypeId() is guaranteed to always return the same
+// value, as it always calls GetTypeId<>() from the Google Test
+// framework.
+#define GTEST_TEST(test_suite_name, test_name)             \
+  GTEST_TEST_(test_suite_name, test_name, ::testing::Test, \
+              ::testing::internal::GetTestTypeId())
+
+// Define this macro to 1 to omit the definition of TEST(), which
+// is a generic name and clashes with some other libraries.
+#if !GTEST_DONT_DEFINE_TEST
+#define TEST(test_suite_name, test_name) GTEST_TEST(test_suite_name, test_name)
+#endif
+
+// Defines a test that uses a test fixture.
+//
+// The first parameter is the name of the test fixture class, which
+// also doubles as the test suite name.  The second parameter is the
+// name of the test within the test suite.
+//
+// A test fixture class must be declared earlier.  The user should put
+// the test code between braces after using this macro.  Example:
+//
+//   class FooTest : public testing::Test {
+//    protected:
+//     void SetUp() override { b_.AddElement(3); }
+//
+//     Foo a_;
+//     Foo b_;
+//   };
+//
+//   TEST_F(FooTest, InitializesCorrectly) {
+//     EXPECT_TRUE(a_.StatusIsOK());
+//   }
+//
+//   TEST_F(FooTest, ReturnsElementCountCorrectly) {
+//     EXPECT_EQ(a_.size(), 0);
+//     EXPECT_EQ(b_.size(), 1);
+//   }
+//
+// GOOGLETEST_CM0011 DO NOT DELETE
+#if !GTEST_DONT_DEFINE_TEST
+#define TEST_F(test_fixture, test_name)\
+  GTEST_TEST_(test_fixture, test_name, test_fixture, \
+              ::testing::internal::GetTypeId<test_fixture>())
+#endif  // !GTEST_DONT_DEFINE_TEST
+
+// Returns a path to temporary directory.
+// Tries to determine an appropriate directory for the platform.
+GTEST_API_ std::string TempDir();
+
+#ifdef _MSC_VER
+#  pragma warning(pop)
+#endif
+
+// Dynamically registers a test with the framework.
+//
+// This is an advanced API only to be used when the `TEST` macros are
+// insufficient. The macros should be preferred when possible, as they avoid
+// most of the complexity of calling this function.
+//
+// The `factory` argument is a factory callable (move-constructible) object or
+// function pointer that creates a new instance of the Test object. It
+// handles ownership to the caller. The signature of the callable is
+// `Fixture*()`, where `Fixture` is the test fixture class for the test. All
+// tests registered with the same `test_suite_name` must return the same
+// fixture type. This is checked at runtime.
+//
+// The framework will infer the fixture class from the factory and will call
+// the `SetUpTestSuite` and `TearDownTestSuite` for it.
+//
+// Must be called before `RUN_ALL_TESTS()` is invoked, otherwise behavior is
+// undefined.
+//
+// Use case example:
+//
+// class MyFixture : public ::testing::Test {
+//  public:
+//   // All of these optional, just like in regular macro usage.
+//   static void SetUpTestSuite() { ... }
+//   static void TearDownTestSuite() { ... }
+//   void SetUp() override { ... }
+//   void TearDown() override { ... }
+// };
+//
+// class MyTest : public MyFixture {
+//  public:
+//   explicit MyTest(int data) : data_(data) {}
+//   void TestBody() override { ... }
+//
+//  private:
+//   int data_;
+// };
+//
+// void RegisterMyTests(const std::vector<int>& values) {
+//   for (int v : values) {
+//     ::testing::RegisterTest(
+//         "MyFixture", ("Test" + std::to_string(v)).c_str(), nullptr,
+//         std::to_string(v).c_str(),
+//         __FILE__, __LINE__,
+//         // Important to use the fixture type as the return type here.
+//         [=]() -> MyFixture* { return new MyTest(v); });
+//   }
+// }
+// ...
+// int main(int argc, char** argv) {
+//   std::vector<int> values_to_test = LoadValuesFromConfig();
+//   RegisterMyTests(values_to_test);
+//   ...
+//   return RUN_ALL_TESTS();
+// }
+//
+template <int&... ExplicitParameterBarrier, typename Factory>
+TestInfo* RegisterTest(const char* test_suite_name, const char* test_name,
+                       const char* type_param, const char* value_param,
+                       const char* file, int line, Factory factory) {
+  using TestT = typename std::remove_pointer<decltype(factory())>::type;
+
+  class FactoryImpl : public internal::TestFactoryBase {
+   public:
+    explicit FactoryImpl(Factory f) : factory_(std::move(f)) {}
+    Test* CreateTest() override { return factory_(); }
+
+   private:
+    Factory factory_;
+  };
+
+  return internal::MakeAndRegisterTestInfo(
+      test_suite_name, test_name, type_param, value_param,
+      internal::CodeLocation(file, line), internal::GetTypeId<TestT>(),
+      internal::SuiteApiResolver<TestT>::GetSetUpCaseOrSuite(file, line),
+      internal::SuiteApiResolver<TestT>::GetTearDownCaseOrSuite(file, line),
+      new FactoryImpl{std::move(factory)});
+}
+
+}  // namespace testing
+
+// Use this function in main() to run all tests.  It returns 0 if all
+// tests are successful, or 1 otherwise.
+//
+// RUN_ALL_TESTS() should be invoked after the command line has been
+// parsed by InitGoogleTest().
+//
+// This function was formerly a macro; thus, it is in the global
+// namespace and has an all-caps name.
+int RUN_ALL_TESTS() GTEST_MUST_USE_RESULT_;
+
+inline int RUN_ALL_TESTS() {
+  return ::testing::UnitTest::GetInstance()->Run();
+}
+
+GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_H_
diff --git a/3rdparty/fmt/test/header-only-test.cc b/3rdparty/fmt/test/header-only-test.cc
new file mode 100644
index 00000000..570f09a5
--- /dev/null
+++ b/3rdparty/fmt/test/header-only-test.cc
@@ -0,0 +1,11 @@
+// Header-only configuration test
+
+#include "fmt/core.h"
+#include "fmt/ostream.h"
+#include "gtest/gtest.h"
+
+#ifndef FMT_HEADER_ONLY
+#  error "Not in the header-only mode."
+#endif
+
+TEST(header_only_test, format) { EXPECT_EQ(fmt::format("foo"), "foo"); }
diff --git a/3rdparty/fmt/test/mock-allocator.h b/3rdparty/fmt/test/mock-allocator.h
new file mode 100644
index 00000000..6a67e08f
--- /dev/null
+++ b/3rdparty/fmt/test/mock-allocator.h
@@ -0,0 +1,64 @@
+// Formatting library for C++ - mock allocator
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_MOCK_ALLOCATOR_H_
+#define FMT_MOCK_ALLOCATOR_H_
+
+#include <assert.h>  // assert
+#include <stddef.h>  // size_t
+
+#include <memory>  // std::allocator_traits
+
+#include "gmock/gmock.h"
+
+template <typename T> class mock_allocator {
+ public:
+  mock_allocator() {}
+  mock_allocator(const mock_allocator&) {}
+  using value_type = T;
+  MOCK_METHOD1_T(allocate, T*(size_t n));
+  MOCK_METHOD2_T(deallocate, void(T* p, size_t n));
+};
+
+template <typename Allocator> class allocator_ref {
+ private:
+  Allocator* alloc_;
+
+  void move(allocator_ref& other) {
+    alloc_ = other.alloc_;
+    other.alloc_ = nullptr;
+  }
+
+ public:
+  using value_type = typename Allocator::value_type;
+
+  explicit allocator_ref(Allocator* alloc = nullptr) : alloc_(alloc) {}
+
+  allocator_ref(const allocator_ref& other) : alloc_(other.alloc_) {}
+  allocator_ref(allocator_ref&& other) { move(other); }
+
+  allocator_ref& operator=(allocator_ref&& other) {
+    assert(this != &other);
+    move(other);
+    return *this;
+  }
+
+  allocator_ref& operator=(const allocator_ref& other) {
+    alloc_ = other.alloc_;
+    return *this;
+  }
+
+ public:
+  Allocator* get() const { return alloc_; }
+
+  value_type* allocate(size_t n) {
+    return std::allocator_traits<Allocator>::allocate(*alloc_, n);
+  }
+  void deallocate(value_type* p, size_t n) { alloc_->deallocate(p, n); }
+};
+
+#endif  // FMT_MOCK_ALLOCATOR_H_
diff --git a/3rdparty/fmt/test/module-test.cc b/3rdparty/fmt/test/module-test.cc
new file mode 100644
index 00000000..39c83983
--- /dev/null
+++ b/3rdparty/fmt/test/module-test.cc
@@ -0,0 +1,580 @@
+// Formatting library for C++ - module tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+//
+// Copyright (c) 2021 - present, Daniela Engert
+// All Rights Reserved
+// {fmt} module.
+
+#ifdef _MSC_FULL_VER
+// hide some implementation bugs in msvc
+// that are not essential to users of the module.
+#  define FMT_HIDE_MODULE_BUGS
+#endif
+
+#define FMT_MODULE_TEST
+
+#include <bit>
+#include <chrono>
+#include <exception>
+#include <iterator>
+#include <locale>
+#include <memory>
+#include <ostream>
+#include <string>
+#include <string_view>
+#include <system_error>
+
+#if (__has_include(<fcntl.h>) || defined(__APPLE__) || \
+     defined(__linux__)) &&                              \
+    (!defined(WINAPI_FAMILY) || (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
+#  include <fcntl.h>
+#  define FMT_USE_FCNTL 1
+#else
+#  define FMT_USE_FCNTL 0
+#endif
+#define FMT_NOEXCEPT noexcept
+#if defined(_WIN32) && !defined(__MINGW32__)
+#  define FMT_POSIX(call) _##call
+#else
+#  define FMT_POSIX(call) call
+#endif
+#define FMT_OS_H_  // don't pull in os.h directly or indirectly
+
+import fmt;
+
+// check for macros leaking from BMI
+static bool macro_leaked =
+#if defined(FMT_CORE_H_) || defined(FMT_FORMAT_H_)
+    true;
+#else
+    false;
+#endif
+
+// Include sources to pick up functions and classes from the module rather than
+// from the non-modular library which is baked into the 'test-main' library.
+// This averts linker problems:
+// - strong ownership model: missing linker symbols
+// - weak ownership model: duplicate linker symbols
+#include "gtest-extra.cc"
+#include "util.cc"
+
+// an implicitly exported namespace must be visible [module.interface]/2.2
+TEST(module_test, namespace) {
+  using namespace fmt;
+  using namespace fmt::literals;
+  ASSERT_TRUE(true);
+}
+
+namespace detail {
+bool oops_detail_namespace_is_visible;
+}
+
+namespace fmt {
+bool namespace_detail_invisible() {
+#if defined(FMT_HIDE_MODULE_BUGS) && defined(_MSC_FULL_VER) && \
+    ((_MSC_VER == 1929 && _MSC_FULL_VER <= 192930136) ||       \
+     (_MSC_VER == 1930 && _MSC_FULL_VER <= 193030704))
+  // bug in msvc up to 16.11.5 / 17.0-pre5:
+
+  // the namespace is visible even when it is neither
+  // implicitly nor explicitly exported
+  return true;
+#else
+  using namespace detail;
+  // this fails to compile if fmt::detail is visible
+  return !oops_detail_namespace_is_visible;
+#endif
+}
+}  // namespace fmt
+
+// the non-exported namespace 'detail' must be invisible [module.interface]/2
+TEST(module_test, detail_namespace) {
+  EXPECT_TRUE(fmt::namespace_detail_invisible());
+}
+
+// macros must not be imported from a *named* module  [cpp.import]/5.1
+TEST(module_test, macros) {
+#if defined(FMT_HIDE_MODULE_BUGS) && defined(_MSC_FULL_VER) && \
+    _MSC_FULL_VER <= 192930130
+  // bug in msvc up to 16.11-pre2:
+  // include-guard macros leak from BMI
+  // and even worse: they cannot be #undef-ined
+  macro_leaked = false;
+#endif
+  EXPECT_FALSE(macro_leaked);
+}
+
+// The following is less about functional testing (that's done elsewhere)
+// but rather visibility of all client-facing overloads, reachability of
+// non-exported entities, name lookup and overload resolution within
+// template instantitions.
+// Excercise all exported entities of the API at least once.
+// Instantiate as many code paths as possible.
+
+TEST(module_test, to_string) {
+  EXPECT_EQ("42", fmt::to_string(42));
+  EXPECT_EQ("42", fmt::to_string(42.0));
+
+  EXPECT_EQ(L"42", fmt::to_wstring(42));
+  EXPECT_EQ(L"42", fmt::to_wstring(42.0));
+}
+
+TEST(module_test, format) {
+  EXPECT_EQ("42", fmt::format("{:}", 42));
+  EXPECT_EQ("-42", fmt::format("{0}", -42.0));
+
+  EXPECT_EQ(L"42", fmt::format(L"{:}", 42));
+  EXPECT_EQ(L"-42", fmt::format(L"{0}", -42.0));
+}
+
+TEST(module_test, format_to) {
+  std::string s;
+  fmt::format_to(std::back_inserter(s), "{}", 42);
+  EXPECT_EQ("42", s);
+
+  char buffer[4] = {0};
+  fmt::format_to(buffer, "{}", 42);
+  EXPECT_EQ("42", std::string_view(buffer));
+
+  fmt::memory_buffer mb;
+  fmt::format_to(mb, "{}", 42);
+  EXPECT_EQ("42", std::string_view(buffer));
+
+  std::wstring w;
+  fmt::format_to(std::back_inserter(w), L"{}", 42);
+  EXPECT_EQ(L"42", w);
+
+  wchar_t wbuffer[4] = {0};
+  fmt::format_to(wbuffer, L"{}", 42);
+  EXPECT_EQ(L"42", std::wstring_view(wbuffer));
+
+  fmt::wmemory_buffer wb;
+  fmt::format_to(wb, L"{}", 42);
+  EXPECT_EQ(L"42", std::wstring_view(wbuffer));
+}
+
+TEST(module_test, formatted_size) {
+  EXPECT_EQ(2u, fmt::formatted_size("{}", 42));
+  EXPECT_EQ(2u, fmt::formatted_size(L"{}", 42));
+}
+
+TEST(module_test, format_to_n) {
+  std::string s;
+  auto result = fmt::format_to_n(std::back_inserter(s), 1, "{}", 42);
+  EXPECT_EQ(2u, result.size);
+  char buffer[4] = {0};
+  fmt::format_to_n(buffer, 3, "{}", 12345);
+
+  std::wstring w;
+  auto wresult = fmt::format_to_n(std::back_inserter(w), 1, L"{}", 42);
+  EXPECT_EQ(2u, wresult.size);
+  wchar_t wbuffer[4] = {0};
+  fmt::format_to_n(wbuffer, 3, L"{}", 12345);
+}
+
+TEST(module_test, format_args) {
+  auto no_args = fmt::format_args();
+  EXPECT_FALSE(no_args.get(1));
+
+  fmt::basic_format_args args = fmt::make_format_args(42);
+  EXPECT_TRUE(args.max_size() > 0);
+  auto arg0 = args.get(0);
+  EXPECT_TRUE(arg0);
+  decltype(arg0) arg_none;
+  EXPECT_FALSE(arg_none);
+  EXPECT_TRUE(arg0.type() != arg_none.type());
+}
+
+TEST(module_test, wformat_args) {
+  auto no_args = fmt::wformat_args();
+  EXPECT_FALSE(no_args.get(1));
+  fmt::basic_format_args args = fmt::make_wformat_args(42);
+  EXPECT_TRUE(args.get(0));
+}
+
+TEST(module_test, checked_format_args) {
+  fmt::basic_format_args args = fmt::make_args_checked<int>("{}", 42);
+  EXPECT_TRUE(args.get(0));
+  fmt::basic_format_args wargs = fmt::make_args_checked<int>(L"{}", 42);
+  EXPECT_TRUE(wargs.get(0));
+}
+
+TEST(module_test, dynamic_format_args) {
+  fmt::dynamic_format_arg_store<fmt::format_context> dyn_store;
+  dyn_store.push_back(fmt::arg("a42", 42));
+  fmt::basic_format_args args = dyn_store;
+  EXPECT_FALSE(args.get(3));
+  EXPECT_TRUE(args.get(fmt::string_view("a42")));
+
+  fmt::dynamic_format_arg_store<fmt::wformat_context> wdyn_store;
+  wdyn_store.push_back(fmt::arg(L"a42", 42));
+  fmt::basic_format_args wargs = wdyn_store;
+  EXPECT_FALSE(wargs.get(3));
+  EXPECT_TRUE(wargs.get(fmt::wstring_view(L"a42")));
+}
+
+TEST(module_test, vformat) {
+  EXPECT_EQ("42", fmt::vformat("{}", fmt::make_format_args(42)));
+  EXPECT_EQ(L"42", fmt::vformat(fmt::to_string_view(L"{}"),
+                                fmt::make_wformat_args(42)));
+}
+
+TEST(module_test, vformat_to) {
+  auto store = fmt::make_format_args(42);
+  std::string s;
+  fmt::vformat_to(std::back_inserter(s), "{}", store);
+  EXPECT_EQ("42", s);
+
+  char buffer[4] = {0};
+  fmt::vformat_to(buffer, "{:}", store);
+  EXPECT_EQ("42", std::string_view(buffer));
+
+  auto wstore = fmt::make_wformat_args(42);
+  std::wstring w;
+  fmt::vformat_to(std::back_inserter(w), L"{}", wstore);
+  EXPECT_EQ(L"42", w);
+
+  wchar_t wbuffer[4] = {0};
+  fmt::vformat_to(wbuffer, L"{:}", wstore);
+  EXPECT_EQ(L"42", std::wstring_view(wbuffer));
+}
+
+TEST(module_test, vformat_to_n) {
+  auto store = fmt::make_format_args(12345);
+  std::string s;
+  auto result = fmt::vformat_to_n(std::back_inserter(s), 1, "{}", store);
+  char buffer[4] = {0};
+  fmt::vformat_to_n(buffer, 3, "{:}", store);
+
+  auto wstore = fmt::make_wformat_args(12345);
+  std::wstring w;
+  auto wresult = fmt::vformat_to_n(std::back_inserter(w), 1,
+                                   fmt::to_string_view(L"{}"), wstore);
+  wchar_t wbuffer[4] = {0};
+  fmt::vformat_to_n(wbuffer, 3, fmt::to_string_view(L"{:}"), wstore);
+}
+
+std::string as_string(std::wstring_view text) {
+  return {reinterpret_cast<const char*>(text.data()),
+          text.size() * sizeof(text[0])};
+}
+
+TEST(module_test, print) {
+  EXPECT_WRITE(stdout, fmt::print("{}µ", 42), "42µ");
+  EXPECT_WRITE(stderr, fmt::print(stderr, "{}µ", 4.2), "4.2µ");
+  if (false) {
+    EXPECT_WRITE(stdout, fmt::print(L"{}µ", 42), as_string(L"42µ"));
+    EXPECT_WRITE(stderr, fmt::print(stderr, L"{}µ", 4.2), as_string(L"4.2µ"));
+  }
+}
+
+TEST(module_test, vprint) {
+  EXPECT_WRITE(stdout, fmt::vprint("{:}µ", fmt::make_format_args(42)), "42µ");
+  EXPECT_WRITE(stderr, fmt::vprint(stderr, "{}", fmt::make_format_args(4.2)),
+               "4.2");
+  if (false) {
+    EXPECT_WRITE(stdout, fmt::vprint(L"{:}µ", fmt::make_wformat_args(42)),
+                 as_string(L"42µ"));
+    EXPECT_WRITE(stderr, fmt::vprint(stderr, L"{}", fmt::make_wformat_args(42)),
+                 as_string(L"42"));
+  }
+}
+
+TEST(module_test, named_args) {
+  EXPECT_EQ("42", fmt::format("{answer}", fmt::arg("answer", 42)));
+  EXPECT_EQ(L"42", fmt::format(L"{answer}", fmt::arg(L"answer", 42)));
+}
+
+TEST(module_test, literals) {
+  using namespace fmt::literals;
+  EXPECT_EQ("42", fmt::format("{answer}", "answer"_a = 42));
+  EXPECT_EQ("42", "{}"_format(42));
+  EXPECT_EQ(L"42", fmt::format(L"{answer}", L"answer"_a = 42));
+  EXPECT_EQ(L"42", L"{}"_format(42));
+}
+
+TEST(module_test, locale) {
+  auto store = fmt::make_format_args(4.2);
+  const auto classic = std::locale::classic();
+  EXPECT_EQ("4.2", fmt::format(classic, "{:L}", 4.2));
+  EXPECT_EQ("4.2", fmt::vformat(classic, "{:L}", store));
+  std::string s;
+  fmt::vformat_to(std::back_inserter(s), classic, "{:L}", store);
+  EXPECT_EQ("4.2", s);
+  EXPECT_EQ("4.2", fmt::format("{:L}", 4.2));
+
+  auto wstore = fmt::make_wformat_args(4.2);
+  EXPECT_EQ(L"4.2", fmt::format(classic, L"{:L}", 4.2));
+  EXPECT_EQ(L"4.2", fmt::vformat(classic, L"{:L}", wstore));
+  std::wstring w;
+  fmt::vformat_to(std::back_inserter(w), classic, L"{:L}", wstore);
+  EXPECT_EQ(L"4.2", w);
+  EXPECT_EQ(L"4.2", fmt::format(L"{:L}", 4.2));
+}
+
+TEST(module_test, string_view) {
+  fmt::string_view nsv("fmt");
+  EXPECT_EQ("fmt", nsv);
+  EXPECT_TRUE(fmt::string_view("fmt") == nsv);
+
+  fmt::wstring_view wsv(L"fmt");
+  EXPECT_EQ(L"fmt", wsv);
+  EXPECT_TRUE(fmt::wstring_view(L"fmt") == wsv);
+}
+
+TEST(module_test, memory_buffer) {
+  fmt::basic_memory_buffer<char, fmt::inline_buffer_size> buffer;
+  fmt::format_to(buffer, "{}", "42");
+  EXPECT_EQ("42", to_string(buffer));
+  fmt::memory_buffer nbuffer(std::move(buffer));
+  EXPECT_EQ("42", to_string(nbuffer));
+  buffer = std::move(nbuffer);
+  EXPECT_EQ("42", to_string(buffer));
+  nbuffer.clear();
+  EXPECT_EQ(0u, to_string(nbuffer).size());
+
+  fmt::wmemory_buffer wbuffer;
+  EXPECT_EQ(0u, to_string(wbuffer).size());
+}
+
+TEST(module_test, is_char) {
+  EXPECT_TRUE(fmt::is_char<char>());
+  EXPECT_TRUE(fmt::is_char<wchar_t>());
+  EXPECT_TRUE(fmt::is_char<char8_t>());
+  EXPECT_TRUE(fmt::is_char<char16_t>());
+  EXPECT_TRUE(fmt::is_char<char32_t>());
+  EXPECT_FALSE(fmt::is_char<signed char>());
+}
+
+TEST(module_test, ptr) {
+  uintptr_t answer = 42;
+  auto p = std::bit_cast<int*>(answer);
+  EXPECT_EQ("0x2a", fmt::to_string(fmt::ptr(p)));
+  std::unique_ptr<int> up(p);
+  EXPECT_EQ("0x2a", fmt::to_string(fmt::ptr(up)));
+  up.release();
+  auto sp = std::make_shared<int>(0);
+  p = sp.get();
+  EXPECT_EQ(fmt::to_string(fmt::ptr(p)), fmt::to_string(fmt::ptr(sp)));
+}
+
+TEST(module_test, errors) {
+  auto store = fmt::make_format_args(42);
+  EXPECT_THROW(throw fmt::format_error("oops"), std::exception);
+  EXPECT_THROW(throw fmt::vsystem_error(0, "{}", store), std::system_error);
+  EXPECT_THROW(throw fmt::system_error(0, "{}", 42), std::system_error);
+
+  fmt::memory_buffer buffer;
+  fmt::format_system_error(buffer, 0, "oops");
+  auto oops = to_string(buffer);
+  EXPECT_TRUE(oops.size() > 0);
+  EXPECT_WRITE(stderr, fmt::report_system_error(0, "oops"), oops + '\n');
+
+#ifdef _WIN32
+  EXPECT_THROW(throw fmt::vwindows_error(0, "{}", store), std::system_error);
+  EXPECT_THROW(throw fmt::windows_error(0, "{}", 42), std::system_error);
+  output_redirect redirect(stderr);
+  fmt::report_windows_error(0, "oops");
+  EXPECT_TRUE(redirect.restore_and_read().size() > 0);
+#endif
+}
+
+TEST(module_test, error_code) {
+  EXPECT_EQ("generic:42",
+            fmt::format("{0}", std::error_code(42, std::generic_category())));
+  EXPECT_EQ("system:42",
+            fmt::format("{0}", std::error_code(42, fmt::system_category())));
+  EXPECT_EQ(L"generic:42",
+            fmt::format(L"{0}", std::error_code(42, std::generic_category())));
+}
+
+TEST(module_test, format_int) {
+  fmt::format_int sanswer(42);
+  EXPECT_EQ("42", fmt::string_view(sanswer.data(), sanswer.size()));
+  fmt::format_int uanswer(42u);
+  EXPECT_EQ("42", fmt::string_view(uanswer.data(), uanswer.size()));
+}
+
+struct test_formatter : fmt::formatter<char> {
+  bool check() { return true; }
+};
+
+struct test_dynamic_formatter : fmt::dynamic_formatter<> {
+  bool check() { return true; }
+};
+
+TEST(module_test, formatter) {
+  EXPECT_TRUE(test_formatter{}.check());
+  EXPECT_TRUE(test_dynamic_formatter{}.check());
+}
+
+TEST(module_test, join) {
+  int arr[3] = {1, 2, 3};
+  std::vector<double> vec{1.0, 2.0, 3.0};
+  std::initializer_list<int> il{1, 2, 3};
+  auto sep = fmt::to_string_view(", ");
+  EXPECT_EQ("1, 2, 3", to_string(fmt::join(arr + 0, arr + 3, sep)));
+  EXPECT_EQ("1, 2, 3", to_string(fmt::join(arr, sep)));
+  EXPECT_EQ("1, 2, 3", to_string(fmt::join(vec.begin(), vec.end(), sep)));
+  EXPECT_EQ("1, 2, 3", to_string(fmt::join(vec, sep)));
+  EXPECT_EQ("1, 2, 3", to_string(fmt::join(il, sep)));
+
+  auto wsep = fmt::to_string_view(L", ");
+  EXPECT_EQ(L"1, 2, 3", fmt::format(L"{}", fmt::join(arr + 0, arr + 3, wsep)));
+  EXPECT_EQ(L"1, 2, 3", fmt::format(L"{}", fmt::join(arr, wsep)));
+  EXPECT_EQ(L"1, 2, 3", fmt::format(L"{}", fmt::join(il, wsep)));
+}
+
+TEST(module_test, time) {
+  auto time_now = std::time(nullptr);
+  EXPECT_TRUE(fmt::localtime(time_now).tm_year > 120);
+  EXPECT_TRUE(fmt::gmtime(time_now).tm_year > 120);
+  auto chrono_now = std::chrono::system_clock::now();
+  EXPECT_TRUE(fmt::localtime(chrono_now).tm_year > 120);
+  EXPECT_TRUE(fmt::gmtime(chrono_now).tm_year > 120);
+}
+
+TEST(module_test, time_point) {
+  auto now = std::chrono::system_clock::now();
+  std::string_view past("2021-05-20 10:30:15");
+  EXPECT_TRUE(past < fmt::format("{:%Y-%m-%d %H:%M:%S}", now));
+  std::wstring_view wpast(L"2021-05-20 10:30:15");
+  EXPECT_TRUE(wpast < fmt::format(L"{:%Y-%m-%d %H:%M:%S}", now));
+}
+
+TEST(module_test, time_duration) {
+  using us = std::chrono::duration<double, std::micro>;
+  EXPECT_EQ("42s", fmt::format("{}", std::chrono::seconds{42}));
+  EXPECT_EQ("4.2µs", fmt::format("{:3.1}", us{4.234}));
+  EXPECT_EQ("4.2µs", fmt::format(std::locale::classic(), "{:L}", us{4.2}));
+
+  EXPECT_EQ(L"42s", fmt::format(L"{}", std::chrono::seconds{42}));
+  EXPECT_EQ(L"4.2µs", fmt::format(L"{:3.1}", us{4.234}));
+  EXPECT_EQ(L"4.2µs", fmt::format(std::locale::classic(), L"{:L}", us{4.2}));
+}
+
+TEST(module_test, weekday) {
+  EXPECT_EQ("Mon", fmt::format(std::locale::classic(), "{}", fmt::weekday(1)));
+}
+
+TEST(module_test, to_string_view) {
+  using fmt::to_string_view;
+  fmt::string_view nsv{to_string_view("42")};
+  EXPECT_EQ("42", nsv);
+  fmt::wstring_view wsv{to_string_view(L"42")};
+  EXPECT_EQ(L"42", wsv);
+}
+
+TEST(module_test, printf) {
+  EXPECT_WRITE(stdout, fmt::printf("%f", 42.123456), "42.123456");
+  EXPECT_WRITE(stdout, fmt::printf("%d", 42), "42");
+  if (false) {
+    EXPECT_WRITE(stdout, fmt::printf(L"%f", 42.123456),
+                 as_string(L"42.123456"));
+    EXPECT_WRITE(stdout, fmt::printf(L"%d", 42), as_string(L"42"));
+  }
+}
+
+TEST(module_test, fprintf) {
+  EXPECT_WRITE(stderr, fmt::fprintf(stderr, "%d", 42), "42");
+  std::ostringstream os;
+  fmt::fprintf(os, "%s", "bla");
+  EXPECT_EQ("bla", os.str());
+
+  EXPECT_WRITE(stderr, fmt::fprintf(stderr, L"%d", 42), as_string(L"42"));
+  std::wostringstream ws;
+  fmt::fprintf(ws, L"%s", L"bla");
+  EXPECT_EQ(L"bla", ws.str());
+}
+
+TEST(module_test, sprintf) {
+  EXPECT_EQ("42", fmt::sprintf("%d", 42));
+  EXPECT_EQ(L"42", fmt::sprintf(L"%d", 42));
+}
+
+TEST(module_test, vprintf) {
+  EXPECT_WRITE(stdout, fmt::vprintf("%d", fmt::make_printf_args(42)), "42");
+  if (false) {
+    EXPECT_WRITE(stdout, fmt::vprintf(L"%d", fmt::make_wprintf_args(42)),
+                 as_string(L"42"));
+  }
+}
+
+TEST(module_test, vfprintf) {
+  auto args = fmt::make_printf_args(42);
+  EXPECT_WRITE(stderr, fmt::vfprintf(stderr, "%d", args), "42");
+  std::ostringstream os;
+  fmt::vfprintf(os, "%d", args);
+  EXPECT_EQ("42", os.str());
+  auto wargs = fmt::make_wprintf_args(42);
+  if (false) {
+    EXPECT_WRITE(stderr, fmt::vfprintf(stderr, L"%d", wargs), as_string(L"42"));
+  }
+  std::wostringstream ws;
+  fmt::vfprintf(ws, L"%d", wargs);
+  EXPECT_EQ(L"42", ws.str());
+}
+
+TEST(module_test, vsprintf) {
+  EXPECT_EQ("42", fmt::vsprintf("%d", fmt::make_printf_args(42)));
+  EXPECT_EQ(L"42", fmt::vsprintf(L"%d", fmt::make_wprintf_args(42)));
+}
+
+TEST(module_test, color) {
+  auto fg_check = fg(fmt::rgb(255, 200, 30));
+  auto bg_check = bg(fmt::color::dark_slate_gray) | fmt::emphasis::italic;
+  auto emphasis_check = fmt::emphasis::underline | fmt::emphasis::bold;
+  EXPECT_EQ("\x1B[30m42\x1B[0m",
+            fmt::format(fg(fmt::terminal_color::black), "{}", 42));
+  EXPECT_EQ(L"\x1B[30m42\x1B[0m",
+            fmt::format(fg(fmt::terminal_color::black), L"{}", 42));
+}
+
+TEST(module_test, cstring_view) {
+  auto s = "fmt";
+  EXPECT_EQ(s, fmt::cstring_view(s).c_str());
+  auto w = L"fmt";
+  EXPECT_EQ(w, fmt::wcstring_view(w).c_str());
+}
+
+TEST(module_test, buffered_file) {
+  EXPECT_TRUE(fmt::buffered_file{}.get() == nullptr);
+}
+
+TEST(module_test, output_file) {
+  fmt::ostream out = fmt::output_file("module-test", fmt::buffer_size = 1);
+  out.close();
+}
+
+struct custom_context {
+  using char_type = char;
+  using parse_context_type = fmt::format_parse_context;
+};
+
+TEST(module_test, custom_context) {
+  fmt::basic_format_arg<custom_context> custom_arg;
+  EXPECT_TRUE(!custom_arg);
+}
+
+struct disabled_formatter {};
+
+TEST(module_test, has_formatter) {
+  EXPECT_FALSE(
+      (fmt::has_formatter<disabled_formatter, fmt::format_context>::value));
+}
+
+TEST(module_test, is_formattable) {
+  EXPECT_FALSE(fmt::is_formattable<disabled_formatter>::value);
+}
+
+TEST(module_test, compile_format_string) {
+  using namespace fmt::literals;
+  EXPECT_EQ("42", fmt::format("{0:x}"_cf, 0x42));
+  EXPECT_EQ(L"42", fmt::format(L"{:}"_cf, 42));
+  EXPECT_EQ("4.2", fmt::format("{arg:3.1f}"_cf, "arg"_a = 4.2));
+  EXPECT_EQ(L" 42", fmt::format(L"{arg:>3}"_cf, L"arg"_a = L"42"));
+}
diff --git a/3rdparty/fmt/test/noexception-test.cc b/3rdparty/fmt/test/noexception-test.cc
new file mode 100644
index 00000000..bf3472fd
--- /dev/null
+++ b/3rdparty/fmt/test/noexception-test.cc
@@ -0,0 +1,18 @@
+// Formatting library for C++ - Noexception tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/args.h"
+#include "fmt/chrono.h"
+#include "fmt/color.h"
+#include "fmt/compile.h"
+#include "fmt/core.h"
+#include "fmt/format.h"
+#include "fmt/os.h"
+#include "fmt/ostream.h"
+#include "fmt/printf.h"
+#include "fmt/ranges.h"
+#include "fmt/xchar.h"
diff --git a/3rdparty/fmt/test/os-test.cc b/3rdparty/fmt/test/os-test.cc
new file mode 100644
index 00000000..5b5ef76e
--- /dev/null
+++ b/3rdparty/fmt/test/os-test.cc
@@ -0,0 +1,551 @@
+// Formatting library for C++ - tests of the OS-specific functionality
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/os.h"
+
+#include <cstdlib>  // std::exit
+#include <cstring>
+#include <memory>
+
+#include "gtest-extra.h"
+#include "util.h"
+
+#ifdef fileno
+#  undef fileno
+#endif
+
+using fmt::buffered_file;
+using testing::HasSubstr;
+using wstring_view = fmt::basic_string_view<wchar_t>;
+
+#ifdef _WIN32
+
+#  include <windows.h>
+
+TEST(util_test, utf16_to_utf8) {
+  auto s = std::string("ёжик");
+  fmt::detail::utf16_to_utf8 u(L"\x0451\x0436\x0438\x043A");
+  EXPECT_EQ(s, u.str());
+  EXPECT_EQ(s.size(), u.size());
+}
+
+TEST(util_test, utf16_to_utf8_empty_string) {
+  std::string s = "";
+  fmt::detail::utf16_to_utf8 u(L"");
+  EXPECT_EQ(s, u.str());
+  EXPECT_EQ(s.size(), u.size());
+}
+
+template <typename Converter, typename Char>
+void check_utf_conversion_error(const char* message,
+                                fmt::basic_string_view<Char> str =
+                                    fmt::basic_string_view<Char>(nullptr, 1)) {
+  fmt::memory_buffer out;
+  fmt::detail::format_windows_error(out, ERROR_INVALID_PARAMETER, message);
+  auto error = std::system_error(std::error_code());
+  try {
+    (Converter)(str);
+  } catch (const std::system_error& e) {
+    error = e;
+  }
+  EXPECT_EQ(ERROR_INVALID_PARAMETER, error.code().value());
+  EXPECT_THAT(error.what(), HasSubstr(fmt::to_string(out)));
+}
+
+TEST(util_test, utf16_to_utf8_error) {
+  check_utf_conversion_error<fmt::detail::utf16_to_utf8, wchar_t>(
+      "cannot convert string from UTF-16 to UTF-8");
+}
+
+TEST(util_test, utf16_to_utf8_convert) {
+  fmt::detail::utf16_to_utf8 u;
+  EXPECT_EQ(ERROR_INVALID_PARAMETER, u.convert(wstring_view(nullptr, 1)));
+  EXPECT_EQ(ERROR_INVALID_PARAMETER,
+            u.convert(wstring_view(L"foo", INT_MAX + 1u)));
+}
+
+TEST(os_test, format_std_error_code) {
+  EXPECT_EQ("generic:42",
+            fmt::format(FMT_STRING("{0}"),
+                        std::error_code(42, std::generic_category())));
+  EXPECT_EQ("system:42",
+            fmt::format(FMT_STRING("{0}"),
+                        std::error_code(42, fmt::system_category())));
+  EXPECT_EQ("system:-42",
+            fmt::format(FMT_STRING("{0}"),
+                        std::error_code(-42, fmt::system_category())));
+}
+
+TEST(os_test, format_windows_error) {
+  LPWSTR message = nullptr;
+  auto result = FormatMessageW(
+      FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
+          FORMAT_MESSAGE_IGNORE_INSERTS,
+      nullptr, ERROR_FILE_EXISTS, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+      reinterpret_cast<LPWSTR>(&message), 0, nullptr);
+  fmt::detail::utf16_to_utf8 utf8_message(wstring_view(message, result - 2));
+  LocalFree(message);
+  fmt::memory_buffer actual_message;
+  fmt::detail::format_windows_error(actual_message, ERROR_FILE_EXISTS, "test");
+  EXPECT_EQ(fmt::format("test: {}", utf8_message.str()),
+            fmt::to_string(actual_message));
+  actual_message.resize(0);
+}
+
+TEST(os_test, format_long_windows_error) {
+  LPWSTR message = nullptr;
+  // this error code is not available on all Windows platforms and
+  // Windows SDKs, so do not fail the test if the error string cannot
+  // be retrieved.
+  int provisioning_not_allowed = 0x80284013L;  // TBS_E_PROVISIONING_NOT_ALLOWED
+  auto result = FormatMessageW(
+      FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
+          FORMAT_MESSAGE_IGNORE_INSERTS,
+      nullptr, static_cast<DWORD>(provisioning_not_allowed),
+      MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+      reinterpret_cast<LPWSTR>(&message), 0, nullptr);
+  if (result == 0) {
+    LocalFree(message);
+    return;
+  }
+  fmt::detail::utf16_to_utf8 utf8_message(wstring_view(message, result - 2));
+  LocalFree(message);
+  fmt::memory_buffer actual_message;
+  fmt::detail::format_windows_error(actual_message, provisioning_not_allowed,
+                                    "test");
+  EXPECT_EQ(fmt::format("test: {}", utf8_message.str()),
+            fmt::to_string(actual_message));
+}
+
+TEST(os_test, windows_error) {
+  auto error = std::system_error(std::error_code());
+  try {
+    throw fmt::windows_error(ERROR_FILE_EXISTS, "test {}", "error");
+  } catch (const std::system_error& e) {
+    error = e;
+  }
+  fmt::memory_buffer message;
+  fmt::detail::format_windows_error(message, ERROR_FILE_EXISTS, "test error");
+  EXPECT_THAT(error.what(), HasSubstr(to_string(message)));
+  EXPECT_EQ(ERROR_FILE_EXISTS, error.code().value());
+}
+
+TEST(os_test, report_windows_error) {
+  fmt::memory_buffer out;
+  fmt::detail::format_windows_error(out, ERROR_FILE_EXISTS, "test error");
+  out.push_back('\n');
+  EXPECT_WRITE(stderr,
+               fmt::report_windows_error(ERROR_FILE_EXISTS, "test error"),
+               fmt::to_string(out));
+}
+
+#endif  // _WIN32
+
+#if FMT_USE_FCNTL
+
+using fmt::file;
+
+bool isclosed(int fd) {
+  char buffer;
+  auto result = std::streamsize();
+  SUPPRESS_ASSERT(result = FMT_POSIX(read(fd, &buffer, 1)));
+  return result == -1 && errno == EBADF;
+}
+
+// Opens a file for reading.
+file open_file() {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  write_end.write(file_content, std::strlen(file_content));
+  write_end.close();
+  return read_end;
+}
+
+// Attempts to write a string to a file.
+void write(file& f, fmt::string_view s) {
+  size_t num_chars_left = s.size();
+  const char* ptr = s.data();
+  do {
+    size_t count = f.write(ptr, num_chars_left);
+    ptr += count;
+    // We can't write more than size_t bytes since num_chars_left
+    // has type size_t.
+    num_chars_left -= count;
+  } while (num_chars_left != 0);
+}
+
+TEST(buffered_file_test, default_ctor) {
+  auto f = buffered_file();
+  EXPECT_TRUE(f.get() == nullptr);
+}
+
+TEST(buffered_file_test, move_ctor) {
+  buffered_file bf = open_buffered_file();
+  FILE* fp = bf.get();
+  EXPECT_TRUE(fp != nullptr);
+  buffered_file bf2(std::move(bf));
+  EXPECT_EQ(fp, bf2.get());
+  EXPECT_TRUE(bf.get() == nullptr);
+}
+
+TEST(buffered_file_test, move_assignment) {
+  buffered_file bf = open_buffered_file();
+  FILE* fp = bf.get();
+  EXPECT_TRUE(fp != nullptr);
+  buffered_file bf2;
+  bf2 = std::move(bf);
+  EXPECT_EQ(fp, bf2.get());
+  EXPECT_TRUE(bf.get() == nullptr);
+}
+
+TEST(buffered_file_test, move_assignment_closes_file) {
+  buffered_file bf = open_buffered_file();
+  buffered_file bf2 = open_buffered_file();
+  int old_fd = bf2.fileno();
+  bf2 = std::move(bf);
+  EXPECT_TRUE(isclosed(old_fd));
+}
+
+TEST(buffered_file_test, move_from_temporary_in_ctor) {
+  FILE* fp = nullptr;
+  buffered_file f = open_buffered_file(&fp);
+  EXPECT_EQ(fp, f.get());
+}
+
+TEST(buffered_file_test, move_from_temporary_in_assignment) {
+  FILE* fp = nullptr;
+  auto f = buffered_file();
+  f = open_buffered_file(&fp);
+  EXPECT_EQ(fp, f.get());
+}
+
+TEST(buffered_file_test, move_from_temporary_in_assignment_closes_file) {
+  buffered_file f = open_buffered_file();
+  int old_fd = f.fileno();
+  f = open_buffered_file();
+  EXPECT_TRUE(isclosed(old_fd));
+}
+
+TEST(buffered_file_test, close_file_in_dtor) {
+  int fd = 0;
+  {
+    buffered_file f = open_buffered_file();
+    fd = f.fileno();
+  }
+  EXPECT_TRUE(isclosed(fd));
+}
+
+TEST(buffered_file_test, close_error_in_dtor) {
+  auto f =
+      std::unique_ptr<buffered_file>(new buffered_file(open_buffered_file()));
+  EXPECT_WRITE(
+      stderr,
+      {
+        // The close function must be called inside EXPECT_WRITE,
+        // otherwise the system may recycle closed file descriptor when
+        // redirecting the output in EXPECT_STDERR and the second close
+        // will break output redirection.
+        FMT_POSIX(close(f->fileno()));
+        SUPPRESS_ASSERT(f.reset(nullptr));
+      },
+      system_error_message(EBADF, "cannot close file") + "\n");
+}
+
+TEST(buffered_file_test, close) {
+  buffered_file f = open_buffered_file();
+  int fd = f.fileno();
+  f.close();
+  EXPECT_TRUE(f.get() == nullptr);
+  EXPECT_TRUE(isclosed(fd));
+}
+
+TEST(buffered_file_test, close_error) {
+  buffered_file f = open_buffered_file();
+  FMT_POSIX(close(f.fileno()));
+  EXPECT_SYSTEM_ERROR_NOASSERT(f.close(), EBADF, "cannot close file");
+  EXPECT_TRUE(f.get() == nullptr);
+}
+
+TEST(buffered_file_test, fileno) {
+  auto f = open_buffered_file();
+  EXPECT_TRUE(f.fileno() != -1);
+  file copy = file::dup(f.fileno());
+  EXPECT_READ(copy, file_content);
+}
+
+TEST(ostream_test, move) {
+  fmt::ostream out = fmt::output_file("test-file");
+  fmt::ostream moved(std::move(out));
+  moved.print("hello");
+}
+
+TEST(ostream_test, move_while_holding_data) {
+  {
+    fmt::ostream out = fmt::output_file("test-file");
+    out.print("Hello, ");
+    fmt::ostream moved(std::move(out));
+    moved.print("world!\n");
+  }
+  {
+    file in("test-file", file::RDONLY);
+    EXPECT_READ(in, "Hello, world!\n");
+  }
+}
+
+TEST(ostream_test, print) {
+  fmt::ostream out = fmt::output_file("test-file");
+  out.print("The answer is {}.\n",
+            fmt::join(std::initializer_list<int>{42}, ", "));
+  out.close();
+  file in("test-file", file::RDONLY);
+  EXPECT_READ(in, "The answer is 42.\n");
+}
+
+TEST(ostream_test, buffer_boundary) {
+  auto str = std::string(4096, 'x');
+  fmt::ostream out = fmt::output_file("test-file");
+  out.print("{}", str);
+  out.print("{}", str);
+  out.close();
+  file in("test-file", file::RDONLY);
+  EXPECT_READ(in, str + str);
+}
+
+TEST(ostream_test, buffer_size) {
+  fmt::ostream out = fmt::output_file("test-file", fmt::buffer_size = 1);
+  out.print("{}", "foo");
+  out.close();
+  file in("test-file", file::RDONLY);
+  EXPECT_READ(in, "foo");
+}
+
+TEST(ostream_test, truncate) {
+  {
+    fmt::ostream out = fmt::output_file("test-file");
+    out.print("0123456789");
+  }
+  {
+    fmt::ostream out = fmt::output_file("test-file");
+    out.print("foo");
+  }
+  file in("test-file", file::RDONLY);
+  EXPECT_EQ("foo", read(in, 4));
+}
+
+TEST(ostream_test, flush) {
+  auto out = fmt::output_file("test-file");
+  out.print("x");
+  out.flush();
+  auto in = fmt::file("test-file", file::RDONLY);
+  EXPECT_READ(in, "x");
+}
+
+TEST(file_test, default_ctor) {
+  file f;
+  EXPECT_EQ(-1, f.descriptor());
+}
+
+TEST(file_test, open_buffered_file_in_ctor) {
+  FILE* fp = safe_fopen("test-file", "w");
+  std::fputs(file_content, fp);
+  std::fclose(fp);
+  file f("test-file", file::RDONLY);
+  // Check if the file is open by reading one character from it.
+  char buffer;
+  bool isopen = FMT_POSIX(read(f.descriptor(), &buffer, 1)) == 1;
+  ASSERT_TRUE(isopen);
+}
+
+TEST(file_test, open_buffered_file_error) {
+  EXPECT_SYSTEM_ERROR(file("nonexistent", file::RDONLY), ENOENT,
+                      "cannot open file nonexistent");
+}
+
+TEST(file_test, move_ctor) {
+  file f = open_file();
+  int fd = f.descriptor();
+  EXPECT_NE(-1, fd);
+  file f2(std::move(f));
+  EXPECT_EQ(fd, f2.descriptor());
+  EXPECT_EQ(-1, f.descriptor());
+}
+
+TEST(file_test, move_assignment) {
+  file f = open_file();
+  int fd = f.descriptor();
+  EXPECT_NE(-1, fd);
+  file f2;
+  f2 = std::move(f);
+  EXPECT_EQ(fd, f2.descriptor());
+  EXPECT_EQ(-1, f.descriptor());
+}
+
+TEST(file_test, move_assignment_closes_file) {
+  file f = open_file();
+  file f2 = open_file();
+  int old_fd = f2.descriptor();
+  f2 = std::move(f);
+  EXPECT_TRUE(isclosed(old_fd));
+}
+
+file open_buffered_file(int& fd) {
+  file f = open_file();
+  fd = f.descriptor();
+  return f;
+}
+
+TEST(file_test, move_from_temporary_in_ctor) {
+  int fd = 0xdead;
+  file f(open_buffered_file(fd));
+  EXPECT_EQ(fd, f.descriptor());
+}
+
+TEST(file_test, move_from_temporary_in_assignment) {
+  int fd = 0xdead;
+  file f;
+  f = open_buffered_file(fd);
+  EXPECT_EQ(fd, f.descriptor());
+}
+
+TEST(file_test, move_from_temporary_in_assignment_closes_file) {
+  int fd = 0xdead;
+  file f = open_file();
+  int old_fd = f.descriptor();
+  f = open_buffered_file(fd);
+  EXPECT_TRUE(isclosed(old_fd));
+}
+
+TEST(file_test, close_file_in_dtor) {
+  int fd = 0;
+  {
+    file f = open_file();
+    fd = f.descriptor();
+  }
+  EXPECT_TRUE(isclosed(fd));
+}
+
+TEST(file_test, close_error_in_dtor) {
+  std::unique_ptr<file> f(new file(open_file()));
+  EXPECT_WRITE(
+      stderr,
+      {
+        // The close function must be called inside EXPECT_WRITE,
+        // otherwise the system may recycle closed file descriptor when
+        // redirecting the output in EXPECT_STDERR and the second close
+        // will break output redirection.
+        FMT_POSIX(close(f->descriptor()));
+        SUPPRESS_ASSERT(f.reset(nullptr));
+      },
+      system_error_message(EBADF, "cannot close file") + "\n");
+}
+
+TEST(file_test, close) {
+  file f = open_file();
+  int fd = f.descriptor();
+  f.close();
+  EXPECT_EQ(-1, f.descriptor());
+  EXPECT_TRUE(isclosed(fd));
+}
+
+TEST(file_test, close_error) {
+  file f = open_file();
+  FMT_POSIX(close(f.descriptor()));
+  EXPECT_SYSTEM_ERROR_NOASSERT(f.close(), EBADF, "cannot close file");
+  EXPECT_EQ(-1, f.descriptor());
+}
+
+TEST(file_test, read) {
+  file f = open_file();
+  EXPECT_READ(f, file_content);
+}
+
+TEST(file_test, read_error) {
+  file f("test-file", file::WRONLY);
+  char buf;
+  // We intentionally read from a file opened in the write-only mode to
+  // cause error.
+  EXPECT_SYSTEM_ERROR(f.read(&buf, 1), EBADF, "cannot read from file");
+}
+
+TEST(file_test, write) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  write(write_end, "test");
+  write_end.close();
+  EXPECT_READ(read_end, "test");
+}
+
+TEST(file_test, write_error) {
+  file f("test-file", file::RDONLY);
+  // We intentionally write to a file opened in the read-only mode to
+  // cause error.
+  EXPECT_SYSTEM_ERROR(f.write(" ", 1), EBADF, "cannot write to file");
+}
+
+TEST(file_test, dup) {
+  file f = open_file();
+  file copy = file::dup(f.descriptor());
+  EXPECT_NE(f.descriptor(), copy.descriptor());
+  EXPECT_EQ(file_content, read(copy, std::strlen(file_content)));
+}
+
+#  ifndef __COVERITY__
+TEST(file_test, dup_error) {
+  int value = -1;
+  EXPECT_SYSTEM_ERROR_NOASSERT(file::dup(value), EBADF,
+                               "cannot duplicate file descriptor -1");
+}
+#  endif
+
+TEST(file_test, dup2) {
+  file f = open_file();
+  file copy = open_file();
+  f.dup2(copy.descriptor());
+  EXPECT_NE(f.descriptor(), copy.descriptor());
+  EXPECT_READ(copy, file_content);
+}
+
+TEST(file_test, dup2_error) {
+  file f = open_file();
+  EXPECT_SYSTEM_ERROR_NOASSERT(
+      f.dup2(-1), EBADF,
+      fmt::format("cannot duplicate file descriptor {} to -1", f.descriptor()));
+}
+
+TEST(file_test, dup2_noexcept) {
+  file f = open_file();
+  file copy = open_file();
+  std::error_code ec;
+  f.dup2(copy.descriptor(), ec);
+  EXPECT_EQ(ec.value(), 0);
+  EXPECT_NE(f.descriptor(), copy.descriptor());
+  EXPECT_READ(copy, file_content);
+}
+
+TEST(file_test, dup2_noexcept_error) {
+  file f = open_file();
+  std::error_code ec;
+  SUPPRESS_ASSERT(f.dup2(-1, ec));
+  EXPECT_EQ(EBADF, ec.value());
+}
+
+TEST(file_test, pipe) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  EXPECT_NE(-1, read_end.descriptor());
+  EXPECT_NE(-1, write_end.descriptor());
+  write(write_end, "test");
+  EXPECT_READ(read_end, "test");
+}
+
+TEST(file_test, fdopen) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  int read_fd = read_end.descriptor();
+  EXPECT_EQ(read_fd, FMT_POSIX(fileno(read_end.fdopen("r").get())));
+}
+#endif  // FMT_USE_FCNTL
diff --git a/3rdparty/fmt/test/ostream-test.cc b/3rdparty/fmt/test/ostream-test.cc
new file mode 100644
index 00000000..f81039e5
--- /dev/null
+++ b/3rdparty/fmt/test/ostream-test.cc
@@ -0,0 +1,301 @@
+// Formatting library for C++ - std::ostream support tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/format.h"
+
+using fmt::runtime;
+
+struct test {};
+
+// Test that there is no issues with specializations when fmt/ostream.h is
+// included after fmt/format.h.
+namespace fmt {
+template <> struct formatter<test> : formatter<int> {
+  auto format(const test&, format_context& ctx) -> decltype(ctx.out()) {
+    return formatter<int>::format(42, ctx);
+  }
+};
+}  // namespace fmt
+
+#include <sstream>
+
+#include "fmt/compile.h"
+#include "fmt/ostream.h"
+#include "fmt/ranges.h"
+#include "gmock/gmock.h"
+#include "gtest-extra.h"
+#include "util.h"
+
+std::ostream& operator<<(std::ostream& os, const date& d) {
+  os << d.year() << '-' << d.month() << '-' << d.day();
+  return os;
+}
+
+std::wostream& operator<<(std::wostream& os, const date& d) {
+  os << d.year() << L'-' << d.month() << L'-' << d.day();
+  return os;
+}
+
+// Make sure that overloaded comma operators do no harm to is_streamable.
+struct type_with_comma_op {};
+template <typename T> void operator,(type_with_comma_op, const T&);
+template <typename T> type_with_comma_op operator<<(T&, const date&);
+
+enum streamable_enum {};
+
+std::ostream& operator<<(std::ostream& os, streamable_enum) {
+  return os << "streamable_enum";
+}
+
+enum unstreamable_enum {};
+
+TEST(ostream_test, enum) {
+  EXPECT_EQ("streamable_enum", fmt::format("{}", streamable_enum()));
+  EXPECT_EQ("0", fmt::format("{}", unstreamable_enum()));
+}
+
+TEST(ostream_test, format) {
+  EXPECT_EQ("a string", fmt::format("{0}", test_string("a string")));
+  EXPECT_EQ("The date is 2012-12-9",
+            fmt::format("The date is {0}", date(2012, 12, 9)));
+}
+
+TEST(ostream_test, format_specs) {
+  using fmt::format_error;
+  EXPECT_EQ("def  ", fmt::format("{0:<5}", test_string("def")));
+  EXPECT_EQ("  def", fmt::format("{0:>5}", test_string("def")));
+  EXPECT_EQ(" def ", fmt::format("{0:^5}", test_string("def")));
+  EXPECT_EQ("def**", fmt::format("{0:*<5}", test_string("def")));
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), test_string()),
+                   format_error, "format specifier requires numeric argument");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), test_string()),
+                   format_error, "format specifier requires numeric argument");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), test_string()),
+                   format_error, "format specifier requires numeric argument");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:#}"), test_string()),
+                   format_error, "format specifier requires numeric argument");
+  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:05}"), test_string()),
+                   format_error, "format specifier requires numeric argument");
+  EXPECT_EQ("test         ", fmt::format("{0:13}", test_string("test")));
+  EXPECT_EQ("test         ", fmt::format("{0:{1}}", test_string("test"), 13));
+  EXPECT_EQ("te", fmt::format("{0:.2}", test_string("test")));
+  EXPECT_EQ("te", fmt::format("{0:.{1}}", test_string("test"), 2));
+}
+
+struct empty_test {};
+std::ostream& operator<<(std::ostream& os, empty_test) { return os << ""; }
+
+TEST(ostream_test, empty_custom_output) {
+  EXPECT_EQ("", fmt::format("{}", empty_test()));
+}
+
+TEST(ostream_test, print) {
+  std::ostringstream os;
+  fmt::print(os, "Don't {}!", "panic");
+  EXPECT_EQ("Don't panic!", os.str());
+}
+
+TEST(ostream_test, write_to_ostream) {
+  std::ostringstream os;
+  fmt::memory_buffer buffer;
+  const char* foo = "foo";
+  buffer.append(foo, foo + std::strlen(foo));
+  fmt::detail::write_buffer(os, buffer);
+  EXPECT_EQ("foo", os.str());
+}
+
+TEST(ostream_test, write_to_ostream_max_size) {
+  auto max_size = fmt::detail::max_value<size_t>();
+  auto max_streamsize = fmt::detail::max_value<std::streamsize>();
+  if (max_size <= fmt::detail::to_unsigned(max_streamsize)) return;
+
+  struct test_buffer final : fmt::detail::buffer<char> {
+    explicit test_buffer(size_t size)
+        : fmt::detail::buffer<char>(nullptr, size, size) {}
+    void grow(size_t) override {}
+  } buffer(max_size);
+
+  struct mock_streambuf : std::streambuf {
+    MOCK_METHOD2(xsputn, std::streamsize(const void* s, std::streamsize n));
+    std::streamsize xsputn(const char* s, std::streamsize n) override {
+      const void* v = s;
+      return xsputn(v, n);
+    }
+  } streambuf;
+
+  struct test_ostream : std::ostream {
+    explicit test_ostream(mock_streambuf& output_buffer)
+        : std::ostream(&output_buffer) {}
+  } os(streambuf);
+
+  testing::InSequence sequence;
+  const char* data = nullptr;
+  using ustreamsize = std::make_unsigned<std::streamsize>::type;
+  ustreamsize size = max_size;
+  do {
+    auto n = std::min(size, fmt::detail::to_unsigned(max_streamsize));
+    EXPECT_CALL(streambuf, xsputn(data, static_cast<std::streamsize>(n)))
+        .WillOnce(testing::Return(max_streamsize));
+    data += n;
+    size -= n;
+  } while (size != 0);
+  fmt::detail::write_buffer(os, buffer);
+}
+
+TEST(ostream_test, join) {
+  int v[3] = {1, 2, 3};
+  EXPECT_EQ("1, 2, 3", fmt::format("{}", fmt::join(v, v + 3, ", ")));
+}
+
+TEST(ostream_test, join_fallback_formatter) {
+  auto strs = std::vector<test_string>{test_string("foo"), test_string("bar")};
+  EXPECT_EQ("foo, bar", fmt::format("{}", fmt::join(strs, ", ")));
+}
+
+#if FMT_USE_CONSTEXPR
+TEST(ostream_test, constexpr_string) {
+  EXPECT_EQ("42", format(FMT_STRING("{}"), std::string("42")));
+  EXPECT_EQ("a string", format(FMT_STRING("{0}"), test_string("a string")));
+}
+#endif
+
+namespace fmt_test {
+struct abc {};
+
+template <typename Output> Output& operator<<(Output& out, abc) {
+  return out << "abc";
+}
+}  // namespace fmt_test
+
+template <typename T> struct test_template {};
+
+template <typename T>
+std::ostream& operator<<(std::ostream& os, test_template<T>) {
+  return os << 1;
+}
+
+namespace fmt {
+template <typename T> struct formatter<test_template<T>> : formatter<int> {
+  auto format(test_template<T>, format_context& ctx) -> decltype(ctx.out()) {
+    return formatter<int>::format(2, ctx);
+  }
+};
+}  // namespace fmt
+
+TEST(ostream_test, template) {
+  EXPECT_EQ("2", fmt::format("{}", test_template<int>()));
+}
+
+TEST(ostream_test, format_to_n) {
+  char buffer[4];
+  buffer[3] = 'x';
+  auto result = fmt::format_to_n(buffer, 3, "{}", fmt_test::abc());
+  EXPECT_EQ(3u, result.size);
+  EXPECT_EQ(buffer + 3, result.out);
+  EXPECT_EQ("abcx", fmt::string_view(buffer, 4));
+  result = fmt::format_to_n(buffer, 3, "x{}y", fmt_test::abc());
+  EXPECT_EQ(5u, result.size);
+  EXPECT_EQ(buffer + 3, result.out);
+  EXPECT_EQ("xabx", fmt::string_view(buffer, 4));
+}
+
+template <typename T> struct convertible {
+  T value;
+  explicit convertible(const T& val) : value(val) {}
+  operator T() const { return value; }
+};
+
+TEST(ostream_test, disable_builtin_ostream_operators) {
+  EXPECT_EQ("42", fmt::format("{:d}", convertible<unsigned short>(42)));
+  EXPECT_EQ("foo", fmt::format("{}", convertible<const char*>("foo")));
+}
+
+struct explicitly_convertible_to_string_like {
+  template <typename String,
+            typename = typename std::enable_if<std::is_constructible<
+                String, const char*, size_t>::value>::type>
+  explicit operator String() const {
+    return String("foo", 3u);
+  }
+};
+
+std::ostream& operator<<(std::ostream& os,
+                         explicitly_convertible_to_string_like) {
+  return os << "bar";
+}
+
+TEST(ostream_test, format_explicitly_convertible_to_string_like) {
+  EXPECT_EQ("bar", fmt::format("{}", explicitly_convertible_to_string_like()));
+}
+
+#ifdef FMT_USE_STRING_VIEW
+struct explicitly_convertible_to_std_string_view {
+  explicit operator fmt::detail::std_string_view<char>() const {
+    return {"foo", 3u};
+  }
+};
+
+std::ostream& operator<<(std::ostream& os,
+                         explicitly_convertible_to_std_string_view) {
+  return os << "bar";
+}
+
+TEST(ostream_test, format_explicitly_convertible_to_std_string_view) {
+  EXPECT_EQ("bar", fmt::format("{}", explicitly_convertible_to_string_like()));
+}
+#endif  // FMT_USE_STRING_VIEW
+
+struct streamable_and_convertible_to_bool {
+  operator bool() const { return true; }
+};
+
+std::ostream& operator<<(std::ostream& os, streamable_and_convertible_to_bool) {
+  return os << "foo";
+}
+
+TEST(ostream_test, format_convertible_to_bool) {
+  // operator<< is intentionally not used because of potential ODR violations.
+  EXPECT_EQ(fmt::format("{}", streamable_and_convertible_to_bool()), "true");
+}
+
+struct copyfmt_test {};
+
+std::ostream& operator<<(std::ostream& os, copyfmt_test) {
+  std::ios ios(nullptr);
+  ios.copyfmt(os);
+  return os << "foo";
+}
+
+TEST(ostream_test, copyfmt) {
+  EXPECT_EQ("foo", fmt::format("{}", copyfmt_test()));
+}
+
+TEST(ostream_test, to_string) {
+  EXPECT_EQ("abc", fmt::to_string(fmt_test::abc()));
+}
+
+TEST(ostream_test, range) {
+  auto strs = std::vector<test_string>{test_string("foo"), test_string("bar")};
+  EXPECT_EQ("[foo, bar]", fmt::format("{}", strs));
+}
+
+struct abstract {
+  virtual ~abstract() = default;
+  virtual void f() = 0;
+  friend std::ostream& operator<<(std::ostream& os, const abstract&) {
+    return os;
+  }
+};
+
+void format_abstract_compiles(const abstract& a) {
+  fmt::format(FMT_COMPILE("{}"), a);
+}
+
+TEST(ostream_test, is_formattable) {
+  EXPECT_TRUE(fmt::is_formattable<std::string>());
+  EXPECT_TRUE(fmt::is_formattable<fmt::detail::std_string_view<char>>());
+}
diff --git a/3rdparty/fmt/test/posix-mock-test.cc b/3rdparty/fmt/test/posix-mock-test.cc
new file mode 100644
index 00000000..255e216c
--- /dev/null
+++ b/3rdparty/fmt/test/posix-mock-test.cc
@@ -0,0 +1,540 @@
+// Tests of the C++ interface to POSIX functions that require mocks
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+// Disable bogus MSVC warnings.
+#ifndef _CRT_SECURE_NO_WARNINGS
+#  define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#include "posix-mock.h"
+
+#include <errno.h>
+#include <fcntl.h>
+
+#include <climits>
+#include <memory>
+
+#include "../src/os.cc"
+
+#ifdef _WIN32
+#  include <io.h>
+#  undef max
+#endif
+
+#include "gmock/gmock.h"
+#include "gtest-extra.h"
+#include "util.h"
+
+using fmt::buffered_file;
+
+using testing::_;
+using testing::Return;
+using testing::StrEq;
+
+template <typename Mock> struct scoped_mock : testing::StrictMock<Mock> {
+  scoped_mock() { Mock::instance = this; }
+  ~scoped_mock() { Mock::instance = nullptr; }
+};
+
+namespace {
+int open_count;
+int close_count;
+int dup_count;
+int dup2_count;
+int fdopen_count;
+int read_count;
+int write_count;
+int pipe_count;
+int fopen_count;
+int fclose_count;
+int fileno_count;
+size_t read_nbyte;
+size_t write_nbyte;
+bool sysconf_error;
+
+enum { none, max_size, error } fstat_sim;
+}  // namespace
+
+#define EMULATE_EINTR(func, error_result) \
+  if (func##_count != 0) {                \
+    if (func##_count++ != 3) {            \
+      errno = EINTR;                      \
+      return error_result;                \
+    }                                     \
+  }
+
+#ifndef _MSC_VER
+int test::open(const char* path, int oflag, int mode) {
+  EMULATE_EINTR(open, -1);
+  return ::open(path, oflag, mode);
+}
+#else
+errno_t test::sopen_s(int* pfh, const char* filename, int oflag, int shflag,
+                      int pmode) {
+  EMULATE_EINTR(open, EINTR);
+  return _sopen_s(pfh, filename, oflag, shflag, pmode);
+}
+#endif
+
+#ifndef _WIN32
+
+long test::sysconf(int name) {
+  long result = ::sysconf(name);
+  if (!sysconf_error) return result;
+  // Simulate an error.
+  errno = EINVAL;
+  return -1;
+}
+
+static off_t max_file_size() { return std::numeric_limits<off_t>::max(); }
+
+int test::fstat(int fd, struct stat* buf) {
+  int result = ::fstat(fd, buf);
+  if (fstat_sim == max_size) buf->st_size = max_file_size();
+  return result;
+}
+
+#else
+
+static LONGLONG max_file_size() { return std::numeric_limits<LONGLONG>::max(); }
+
+DWORD test::GetFileSize(HANDLE hFile, LPDWORD lpFileSizeHigh) {
+  if (fstat_sim == error) {
+    SetLastError(ERROR_ACCESS_DENIED);
+    return INVALID_FILE_SIZE;
+  }
+  if (fstat_sim == max_size) {
+    DWORD max = std::numeric_limits<DWORD>::max();
+    *lpFileSizeHigh = max >> 1;
+    return max;
+  }
+  return ::GetFileSize(hFile, lpFileSizeHigh);
+}
+
+#endif
+
+int test::close(int fildes) {
+  // Close the file first because close shouldn't be retried.
+  int result = ::FMT_POSIX(close(fildes));
+  EMULATE_EINTR(close, -1);
+  return result;
+}
+
+int test::dup(int fildes) {
+  EMULATE_EINTR(dup, -1);
+  return ::FMT_POSIX(dup(fildes));
+}
+
+int test::dup2(int fildes, int fildes2) {
+  EMULATE_EINTR(dup2, -1);
+  return ::FMT_POSIX(dup2(fildes, fildes2));
+}
+
+FILE* test::fdopen(int fildes, const char* mode) {
+  EMULATE_EINTR(fdopen, nullptr);
+  return ::FMT_POSIX(fdopen(fildes, mode));
+}
+
+test::ssize_t test::read(int fildes, void* buf, test::size_t nbyte) {
+  read_nbyte = nbyte;
+  EMULATE_EINTR(read, -1);
+  return ::FMT_POSIX(read(fildes, buf, nbyte));
+}
+
+test::ssize_t test::write(int fildes, const void* buf, test::size_t nbyte) {
+  write_nbyte = nbyte;
+  EMULATE_EINTR(write, -1);
+  return ::FMT_POSIX(write(fildes, buf, nbyte));
+}
+
+#ifndef _WIN32
+int test::pipe(int fildes[2]) {
+  EMULATE_EINTR(pipe, -1);
+  return ::pipe(fildes);
+}
+#else
+int test::pipe(int* pfds, unsigned psize, int textmode) {
+  EMULATE_EINTR(pipe, -1);
+  return _pipe(pfds, psize, textmode);
+}
+#endif
+
+FILE* test::fopen(const char* filename, const char* mode) {
+  EMULATE_EINTR(fopen, nullptr);
+  return ::fopen(filename, mode);
+}
+
+int test::fclose(FILE* stream) {
+  EMULATE_EINTR(fclose, EOF);
+  return ::fclose(stream);
+}
+
+int(test::fileno)(FILE* stream) {
+  EMULATE_EINTR(fileno, -1);
+#ifdef fileno
+  return FMT_POSIX(fileno(stream));
+#else
+  return ::FMT_POSIX(fileno(stream));
+#endif
+}
+
+#ifndef _WIN32
+#  define EXPECT_RETRY(statement, func, message) \
+    func##_count = 1;                            \
+    statement;                                   \
+    EXPECT_EQ(4, func##_count);                  \
+    func##_count = 0;
+#  define EXPECT_EQ_POSIX(expected, actual) EXPECT_EQ(expected, actual)
+#else
+#  define EXPECT_RETRY(statement, func, message)    \
+    func##_count = 1;                               \
+    EXPECT_SYSTEM_ERROR(statement, EINTR, message); \
+    func##_count = 0;
+#  define EXPECT_EQ_POSIX(expected, actual)
+#endif
+
+#if FMT_USE_FCNTL
+void write_file(fmt::cstring_view filename, fmt::string_view content) {
+  fmt::buffered_file f(filename, "w");
+  f.print("{}", content);
+}
+
+using fmt::file;
+
+TEST(os_test, getpagesize) {
+#  ifdef _WIN32
+  SYSTEM_INFO si = {};
+  GetSystemInfo(&si);
+  EXPECT_EQ(si.dwPageSize, fmt::getpagesize());
+#  else
+  EXPECT_EQ(sysconf(_SC_PAGESIZE), fmt::getpagesize());
+  sysconf_error = true;
+  EXPECT_SYSTEM_ERROR(fmt::getpagesize(), EINVAL,
+                      "cannot get memory page size");
+  sysconf_error = false;
+#  endif
+}
+
+TEST(file_test, open_retry) {
+  write_file("temp", "there must be something here");
+  std::unique_ptr<file> f{nullptr};
+  EXPECT_RETRY(f.reset(new file("temp", file::RDONLY)), open,
+               "cannot open file temp");
+#  ifndef _WIN32
+  char c = 0;
+  f->read(&c, 1);
+#  endif
+}
+
+TEST(file_test, close_no_retry_in_dtor) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  std::unique_ptr<file> f(new file(std::move(read_end)));
+  int saved_close_count = 0;
+  EXPECT_WRITE(
+      stderr,
+      {
+        close_count = 1;
+        f.reset(nullptr);
+        saved_close_count = close_count;
+        close_count = 0;
+      },
+      system_error_message(EINTR, "cannot close file") + "\n");
+  EXPECT_EQ(2, saved_close_count);
+}
+
+TEST(file_test, close_no_retry) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  close_count = 1;
+  EXPECT_SYSTEM_ERROR(read_end.close(), EINTR, "cannot close file");
+  EXPECT_EQ(2, close_count);
+  close_count = 0;
+}
+
+TEST(file_test, size) {
+  std::string content = "top secret, destroy before reading";
+  write_file("temp", content);
+  file f("temp", file::RDONLY);
+  EXPECT_GE(f.size(), 0);
+  EXPECT_EQ(content.size(), static_cast<unsigned long long>(f.size()));
+#  ifdef _WIN32
+  auto error_code = std::error_code();
+  fstat_sim = error;
+  try {
+    f.size();
+  } catch (const std::system_error& e) {
+    error_code = e.code();
+  }
+  fstat_sim = none;
+  EXPECT_EQ(error_code,
+            std::error_code(ERROR_ACCESS_DENIED, fmt::system_category()));
+#  else
+  f.close();
+  EXPECT_SYSTEM_ERROR(f.size(), EBADF, "cannot get file attributes");
+#  endif
+}
+
+TEST(file_test, max_size) {
+  write_file("temp", "");
+  file f("temp", file::RDONLY);
+  fstat_sim = max_size;
+  EXPECT_GE(f.size(), 0);
+  EXPECT_EQ(max_file_size(), f.size());
+  fstat_sim = none;
+}
+
+TEST(file_test, read_retry) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  enum { SIZE = 4 };
+  write_end.write("test", SIZE);
+  write_end.close();
+  char buffer[SIZE];
+  size_t count = 0;
+  EXPECT_RETRY(count = read_end.read(buffer, SIZE), read,
+               "cannot read from file");
+  EXPECT_EQ_POSIX(static_cast<std::streamsize>(SIZE), count);
+}
+
+TEST(file_test, write_retry) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  enum { SIZE = 4 };
+  size_t count = 0;
+  EXPECT_RETRY(count = write_end.write("test", SIZE), write,
+               "cannot write to file");
+  write_end.close();
+#  ifndef _WIN32
+  EXPECT_EQ(static_cast<std::streamsize>(SIZE), count);
+  char buffer[SIZE + 1];
+  read_end.read(buffer, SIZE);
+  buffer[SIZE] = '\0';
+  EXPECT_STREQ("test", buffer);
+#  endif
+}
+
+#  ifdef _WIN32
+TEST(file_test, convert_read_count) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  char c;
+  size_t size = UINT_MAX;
+  if (sizeof(unsigned) != sizeof(size_t)) ++size;
+  read_count = 1;
+  read_nbyte = 0;
+  EXPECT_THROW(read_end.read(&c, size), std::system_error);
+  read_count = 0;
+  EXPECT_EQ(UINT_MAX, read_nbyte);
+}
+
+TEST(file_test, convert_write_count) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  char c;
+  size_t size = UINT_MAX;
+  if (sizeof(unsigned) != sizeof(size_t)) ++size;
+  write_count = 1;
+  write_nbyte = 0;
+  EXPECT_THROW(write_end.write(&c, size), std::system_error);
+  write_count = 0;
+  EXPECT_EQ(UINT_MAX, write_nbyte);
+}
+#  endif
+
+TEST(file_test, dup_no_retry) {
+  int stdout_fd = FMT_POSIX(fileno(stdout));
+  dup_count = 1;
+  EXPECT_SYSTEM_ERROR(
+      file::dup(stdout_fd), EINTR,
+      fmt::format("cannot duplicate file descriptor {}", stdout_fd));
+  dup_count = 0;
+}
+
+TEST(file_test, dup2_retry) {
+  int stdout_fd = FMT_POSIX(fileno(stdout));
+  file f1 = file::dup(stdout_fd), f2 = file::dup(stdout_fd);
+  EXPECT_RETRY(f1.dup2(f2.descriptor()), dup2,
+               fmt::format("cannot duplicate file descriptor {} to {}",
+                           f1.descriptor(), f2.descriptor()));
+}
+
+TEST(file_test, dup2_no_except_retry) {
+  int stdout_fd = FMT_POSIX(fileno(stdout));
+  file f1 = file::dup(stdout_fd), f2 = file::dup(stdout_fd);
+  std::error_code ec;
+  dup2_count = 1;
+  f1.dup2(f2.descriptor(), ec);
+#  ifndef _WIN32
+  EXPECT_EQ(4, dup2_count);
+#  else
+  EXPECT_EQ(EINTR, ec.value());
+#  endif
+  dup2_count = 0;
+}
+
+TEST(file_test, pipe_no_retry) {
+  file read_end, write_end;
+  pipe_count = 1;
+  EXPECT_SYSTEM_ERROR(file::pipe(read_end, write_end), EINTR,
+                      "cannot create pipe");
+  pipe_count = 0;
+}
+
+TEST(file_test, fdopen_no_retry) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  fdopen_count = 1;
+  EXPECT_SYSTEM_ERROR(read_end.fdopen("r"), EINTR,
+                      "cannot associate stream with file descriptor");
+  fdopen_count = 0;
+}
+
+TEST(buffered_file_test, open_retry) {
+  write_file("temp", "there must be something here");
+  std::unique_ptr<buffered_file> f{nullptr};
+  EXPECT_RETRY(f.reset(new buffered_file("temp", "r")), fopen,
+               "cannot open file temp");
+#  ifndef _WIN32
+  char c = 0;
+  if (fread(&c, 1, 1, f->get()) < 1)
+    throw fmt::system_error(errno, "fread failed");
+#  endif
+}
+
+TEST(buffered_file_test, close_no_retry_in_dtor) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  std::unique_ptr<buffered_file> f(new buffered_file(read_end.fdopen("r")));
+  int saved_fclose_count = 0;
+  EXPECT_WRITE(
+      stderr,
+      {
+        fclose_count = 1;
+        f.reset(nullptr);
+        saved_fclose_count = fclose_count;
+        fclose_count = 0;
+      },
+      system_error_message(EINTR, "cannot close file") + "\n");
+  EXPECT_EQ(2, saved_fclose_count);
+}
+
+TEST(buffered_file_test, close_no_retry) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  buffered_file f = read_end.fdopen("r");
+  fclose_count = 1;
+  EXPECT_SYSTEM_ERROR(f.close(), EINTR, "cannot close file");
+  EXPECT_EQ(2, fclose_count);
+  fclose_count = 0;
+}
+
+TEST(buffered_file_test, fileno_no_retry) {
+  file read_end, write_end;
+  file::pipe(read_end, write_end);
+  buffered_file f = read_end.fdopen("r");
+  fileno_count = 1;
+  EXPECT_SYSTEM_ERROR((f.fileno)(), EINTR, "cannot get file descriptor");
+  EXPECT_EQ(2, fileno_count);
+  fileno_count = 0;
+}
+#endif  // FMT_USE_FCNTL
+
+struct test_mock {
+  static test_mock* instance;
+} * test_mock::instance;
+
+TEST(scoped_mock, scope) {
+  {
+    scoped_mock<test_mock> mock;
+    EXPECT_EQ(&mock, test_mock::instance);
+    test_mock& copy = mock;
+    static_cast<void>(copy);
+  }
+  EXPECT_EQ(nullptr, test_mock::instance);
+}
+
+#ifdef FMT_LOCALE
+
+using locale_type = fmt::locale::type;
+
+struct locale_mock {
+  static locale_mock* instance;
+  MOCK_METHOD3(newlocale, locale_type(int category_mask, const char* locale,
+                                      locale_type base));
+  MOCK_METHOD1(freelocale, void(locale_type locale));
+} * locale_mock::instance;
+
+#  ifdef _MSC_VER
+#    pragma warning(push)
+#    pragma warning(disable : 4273)
+#    ifdef __clang__
+#      pragma clang diagnostic push
+#      pragma clang diagnostic ignored "-Winconsistent-dllimport"
+#    endif
+
+_locale_t _create_locale(int category, const char* locale) {
+  return locale_mock::instance->newlocale(category, locale, 0);
+}
+
+void _free_locale(_locale_t locale) {
+  locale_mock::instance->freelocale(locale);
+}
+#    ifdef __clang__
+#      pragma clang diagnostic pop
+#    endif
+#    pragma warning(pop)
+#  endif
+
+#  if defined(__THROW) && \
+      ((FMT_GCC_VERSION > 0 && FMT_GCC_VERSION <= 408) || defined(__e2k__))
+#    define FMT_LOCALE_THROW __THROW
+#  else
+#    define FMT_LOCALE_THROW
+#  endif
+
+#  if defined(__APPLE__) || \
+      (defined(__FreeBSD__) && __FreeBSD_version < 1200002)
+typedef int FreeLocaleResult;
+#  else
+typedef void FreeLocaleResult;
+#  endif
+
+FreeLocaleResult freelocale(locale_type locale) FMT_LOCALE_THROW {
+  locale_mock::instance->freelocale(locale);
+  return FreeLocaleResult();
+}
+
+#  undef FMT_LOCALE_THROW
+
+#  ifndef _WIN32
+locale_t test::newlocale(int category_mask, const char* locale, locale_t base) {
+  return locale_mock::instance->newlocale(category_mask, locale, base);
+}
+
+TEST(locale_test, locale_mock) {
+  scoped_mock<locale_mock> mock;
+  auto locale = reinterpret_cast<locale_type>(11);
+  EXPECT_CALL(mock, newlocale(222, StrEq("foo"), locale));
+  FMT_SYSTEM(newlocale(222, "foo", locale));
+}
+#  endif
+
+TEST(locale_test, locale) {
+#  ifndef LC_NUMERIC_MASK
+  enum { LC_NUMERIC_MASK = LC_NUMERIC };
+#  endif
+  scoped_mock<locale_mock> mock;
+  auto impl = reinterpret_cast<locale_type>(42);
+  EXPECT_CALL(mock, newlocale(LC_NUMERIC_MASK, StrEq("C"), nullptr))
+      .WillOnce(Return(impl));
+  EXPECT_CALL(mock, freelocale(impl));
+  fmt::locale loc;
+  EXPECT_EQ(impl, loc.get());
+}
+
+#endif  // FMT_LOCALE
diff --git a/3rdparty/fmt/test/posix-mock.h b/3rdparty/fmt/test/posix-mock.h
new file mode 100644
index 00000000..e76af700
--- /dev/null
+++ b/3rdparty/fmt/test/posix-mock.h
@@ -0,0 +1,77 @@
+// Formatting library for C++ - mocks of POSIX functions
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_POSIX_TEST_H
+#define FMT_POSIX_TEST_H
+
+#include <errno.h>
+#include <locale.h>
+#include <stdio.h>
+#ifdef __APPLE__
+#  include <xlocale.h>
+#endif
+
+#ifdef _WIN32
+#  include <windows.h>
+#else
+#  include <sys/param.h>  // for FreeBSD version
+#  include <sys/types.h>  // for ssize_t
+#endif
+
+#ifndef _MSC_VER
+struct stat;
+#endif
+
+namespace test {
+
+#ifndef _MSC_VER
+// Size type for read and write.
+typedef size_t size_t;
+typedef ssize_t ssize_t;
+int open(const char* path, int oflag, int mode);
+int fstat(int fd, struct stat* buf);
+#else
+typedef unsigned size_t;
+typedef int ssize_t;
+errno_t sopen_s(int* pfh, const char* filename, int oflag, int shflag,
+                int pmode);
+#endif
+
+#ifndef _WIN32
+long sysconf(int name);
+#else
+DWORD GetFileSize(HANDLE hFile, LPDWORD lpFileSizeHigh);
+#endif
+
+int close(int fildes);
+
+int dup(int fildes);
+int dup2(int fildes, int fildes2);
+
+FILE* fdopen(int fildes, const char* mode);
+
+ssize_t read(int fildes, void* buf, size_t nbyte);
+ssize_t write(int fildes, const void* buf, size_t nbyte);
+
+#ifndef _WIN32
+int pipe(int fildes[2]);
+#else
+int pipe(int* pfds, unsigned psize, int textmode);
+#endif
+
+FILE* fopen(const char* filename, const char* mode);
+int fclose(FILE* stream);
+int(fileno)(FILE* stream);
+
+#if defined(FMT_LOCALE) && !defined(_WIN32)
+locale_t newlocale(int category_mask, const char* locale, locale_t base);
+#endif
+}  // namespace test
+
+#define FMT_SYSTEM(call) test::call
+
+#endif  // FMT_POSIX_TEST_H
diff --git a/3rdparty/fmt/test/printf-test.cc b/3rdparty/fmt/test/printf-test.cc
new file mode 100644
index 00000000..0bb9ccda
--- /dev/null
+++ b/3rdparty/fmt/test/printf-test.cc
@@ -0,0 +1,588 @@
+// Formatting library for C++ - printf tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/printf.h"
+
+#include <cctype>
+#include <climits>
+#include <cstring>
+
+#include "fmt/ostream.h"
+#include "fmt/xchar.h"
+#include "gtest-extra.h"
+#include "util.h"
+
+using fmt::format;
+using fmt::format_error;
+using fmt::detail::max_value;
+
+const unsigned big_num = INT_MAX + 1u;
+
+// Makes format string argument positional.
+static std::string make_positional(fmt::string_view format) {
+  std::string s(format.data(), format.size());
+  s.replace(s.find('%'), 1, "%1$");
+  return s;
+}
+
+static std::wstring make_positional(fmt::basic_string_view<wchar_t> format) {
+  std::wstring s(format.data(), format.size());
+  s.replace(s.find(L'%'), 1, L"%1$");
+  return s;
+}
+
+// A wrapper around fmt::sprintf to workaround bogus warnings about invalid
+// format strings in MSVC.
+template <typename... Args>
+std::string test_sprintf(fmt::string_view format, const Args&... args) {
+  return fmt::sprintf(format, args...);
+}
+template <typename... Args>
+std::wstring test_sprintf(fmt::basic_string_view<wchar_t> format,
+                          const Args&... args) {
+  return fmt::sprintf(format, args...);
+}
+
+#define EXPECT_PRINTF(expected_output, format, arg)     \
+  EXPECT_EQ(expected_output, test_sprintf(format, arg)) \
+      << "format: " << format;                          \
+  EXPECT_EQ(expected_output, fmt::sprintf(make_positional(format), arg))
+
+TEST(printf_test, no_args) {
+  EXPECT_EQ("test", test_sprintf("test"));
+  EXPECT_EQ(L"test", fmt::sprintf(L"test"));
+}
+
+TEST(printf_test, escape) {
+  EXPECT_EQ("%", test_sprintf("%%"));
+  EXPECT_EQ("before %", test_sprintf("before %%"));
+  EXPECT_EQ("% after", test_sprintf("%% after"));
+  EXPECT_EQ("before % after", test_sprintf("before %% after"));
+  EXPECT_EQ("%s", test_sprintf("%%s"));
+  EXPECT_EQ(L"%", fmt::sprintf(L"%%"));
+  EXPECT_EQ(L"before %", fmt::sprintf(L"before %%"));
+  EXPECT_EQ(L"% after", fmt::sprintf(L"%% after"));
+  EXPECT_EQ(L"before % after", fmt::sprintf(L"before %% after"));
+  EXPECT_EQ(L"%s", fmt::sprintf(L"%%s"));
+}
+
+TEST(printf_test, positional_args) {
+  EXPECT_EQ("42", test_sprintf("%1$d", 42));
+  EXPECT_EQ("before 42", test_sprintf("before %1$d", 42));
+  EXPECT_EQ("42 after", test_sprintf("%1$d after", 42));
+  EXPECT_EQ("before 42 after", test_sprintf("before %1$d after", 42));
+  EXPECT_EQ("answer = 42", test_sprintf("%1$s = %2$d", "answer", 42));
+  EXPECT_EQ("42 is the answer", test_sprintf("%2$d is the %1$s", "answer", 42));
+  EXPECT_EQ("abracadabra", test_sprintf("%1$s%2$s%1$s", "abra", "cad"));
+}
+
+TEST(printf_test, automatic_arg_indexing) {
+  EXPECT_EQ("abc", test_sprintf("%c%c%c", 'a', 'b', 'c'));
+}
+
+TEST(printf_test, number_is_too_big_in_arg_index) {
+  EXPECT_THROW_MSG(test_sprintf(format("%{}$", big_num)), format_error,
+                   "argument not found");
+  EXPECT_THROW_MSG(test_sprintf(format("%{}$d", big_num)), format_error,
+                   "argument not found");
+}
+
+TEST(printf_test, switch_arg_indexing) {
+  EXPECT_THROW_MSG(test_sprintf("%1$d%", 1, 2), format_error,
+                   "cannot switch from manual to automatic argument indexing");
+  EXPECT_THROW_MSG(test_sprintf(format("%1$d%{}d", big_num), 1, 2),
+                   format_error, "number is too big");
+  EXPECT_THROW_MSG(test_sprintf("%1$d%d", 1, 2), format_error,
+                   "cannot switch from manual to automatic argument indexing");
+
+  EXPECT_THROW_MSG(test_sprintf("%d%1$", 1, 2), format_error,
+                   "cannot switch from automatic to manual argument indexing");
+  EXPECT_THROW_MSG(test_sprintf(format("%d%{}$d", big_num), 1, 2), format_error,
+                   "cannot switch from automatic to manual argument indexing");
+  EXPECT_THROW_MSG(test_sprintf("%d%1$d", 1, 2), format_error,
+                   "cannot switch from automatic to manual argument indexing");
+
+  // Indexing errors override width errors.
+  EXPECT_THROW_MSG(test_sprintf(format("%d%1${}d", big_num), 1, 2),
+                   format_error, "number is too big");
+  EXPECT_THROW_MSG(test_sprintf(format("%1$d%{}d", big_num), 1, 2),
+                   format_error, "number is too big");
+}
+
+TEST(printf_test, invalid_arg_index) {
+  EXPECT_THROW_MSG(test_sprintf("%0$d", 42), format_error,
+                   "argument not found");
+  EXPECT_THROW_MSG(test_sprintf("%2$d", 42), format_error,
+                   "argument not found");
+  EXPECT_THROW_MSG(test_sprintf(format("%{}$d", INT_MAX), 42), format_error,
+                   "argument not found");
+
+  EXPECT_THROW_MSG(test_sprintf("%2$", 42), format_error, "argument not found");
+  EXPECT_THROW_MSG(test_sprintf(format("%{}$d", big_num), 42), format_error,
+                   "argument not found");
+}
+
+TEST(printf_test, default_align_right) {
+  EXPECT_PRINTF("   42", "%5d", 42);
+  EXPECT_PRINTF("  abc", "%5s", "abc");
+}
+
+TEST(printf_test, zero_flag) {
+  EXPECT_PRINTF("00042", "%05d", 42);
+  EXPECT_PRINTF("-0042", "%05d", -42);
+
+  EXPECT_PRINTF("00042", "%05d", 42);
+  EXPECT_PRINTF("-0042", "%05d", -42);
+  EXPECT_PRINTF("-004.2", "%06g", -4.2);
+
+  EXPECT_PRINTF("+00042", "%00+6d", 42);
+
+  EXPECT_PRINTF("   42", "%05.d", 42);
+  EXPECT_PRINTF(" 0042", "%05.4d", 42);
+
+  // '0' flag is ignored for non-numeric types.
+  EXPECT_PRINTF("    x", "%05c", 'x');
+}
+
+TEST(printf_test, plus_flag) {
+  EXPECT_PRINTF("+42", "%+d", 42);
+  EXPECT_PRINTF("-42", "%+d", -42);
+  EXPECT_PRINTF("+0042", "%+05d", 42);
+  EXPECT_PRINTF("+0042", "%0++5d", 42);
+
+  // '+' flag is ignored for non-numeric types.
+  EXPECT_PRINTF("x", "%+c", 'x');
+
+  // '+' flag wins over space flag
+  EXPECT_PRINTF("+42", "%+ d", 42);
+  EXPECT_PRINTF("-42", "%+ d", -42);
+  EXPECT_PRINTF("+42", "% +d", 42);
+  EXPECT_PRINTF("-42", "% +d", -42);
+  EXPECT_PRINTF("+0042", "% +05d", 42);
+  EXPECT_PRINTF("+0042", "%0+ 5d", 42);
+
+  // '+' flag and space flag are both ignored for non-numeric types.
+  EXPECT_PRINTF("x", "%+ c", 'x');
+  EXPECT_PRINTF("x", "% +c", 'x');
+}
+
+TEST(printf_test, minus_flag) {
+  EXPECT_PRINTF("abc  ", "%-5s", "abc");
+  EXPECT_PRINTF("abc  ", "%0--5s", "abc");
+
+  EXPECT_PRINTF("7    ", "%-5d", 7);
+  EXPECT_PRINTF("97   ", "%-5hhi", 'a');
+  EXPECT_PRINTF("a    ", "%-5c", 'a');
+
+  // '0' flag is ignored if '-' flag is given
+  EXPECT_PRINTF("7    ", "%-05d", 7);
+  EXPECT_PRINTF("7    ", "%0-5d", 7);
+  EXPECT_PRINTF("a    ", "%-05c", 'a');
+  EXPECT_PRINTF("a    ", "%0-5c", 'a');
+  EXPECT_PRINTF("97   ", "%-05hhi", 'a');
+  EXPECT_PRINTF("97   ", "%0-5hhi", 'a');
+
+  // '-' and space flag don't interfere
+  EXPECT_PRINTF(" 42", "%- d", 42);
+}
+
+TEST(printf_test, space_flag) {
+  EXPECT_PRINTF(" 42", "% d", 42);
+  EXPECT_PRINTF("-42", "% d", -42);
+  EXPECT_PRINTF(" 0042", "% 05d", 42);
+  EXPECT_PRINTF(" 0042", "%0  5d", 42);
+
+  // ' ' flag is ignored for non-numeric types.
+  EXPECT_PRINTF("x", "% c", 'x');
+}
+
+TEST(printf_test, hash_flag) {
+  EXPECT_PRINTF("042", "%#o", 042);
+  EXPECT_PRINTF(fmt::format("0{:o}", static_cast<unsigned>(-042)), "%#o", -042);
+  EXPECT_PRINTF("0", "%#o", 0);
+
+  EXPECT_PRINTF("0x42", "%#x", 0x42);
+  EXPECT_PRINTF("0X42", "%#X", 0x42);
+  EXPECT_PRINTF(fmt::format("0x{:x}", static_cast<unsigned>(-0x42)), "%#x",
+                -0x42);
+  EXPECT_PRINTF("0", "%#x", 0);
+
+  EXPECT_PRINTF("0x0042", "%#06x", 0x42);
+  EXPECT_PRINTF("0x0042", "%0##6x", 0x42);
+
+  EXPECT_PRINTF("-42.000000", "%#f", -42.0);
+  EXPECT_PRINTF("-42.000000", "%#F", -42.0);
+
+  char buffer[256];
+  safe_sprintf(buffer, "%#e", -42.0);
+  EXPECT_PRINTF(buffer, "%#e", -42.0);
+  safe_sprintf(buffer, "%#E", -42.0);
+  EXPECT_PRINTF(buffer, "%#E", -42.0);
+
+  EXPECT_PRINTF("-42.0000", "%#g", -42.0);
+  EXPECT_PRINTF("-42.0000", "%#G", -42.0);
+
+  safe_sprintf(buffer, "%#a", 16.0);
+  EXPECT_PRINTF(buffer, "%#a", 16.0);
+  safe_sprintf(buffer, "%#A", 16.0);
+  EXPECT_PRINTF(buffer, "%#A", 16.0);
+
+  // '#' flag is ignored for non-numeric types.
+  EXPECT_PRINTF("x", "%#c", 'x');
+}
+
+TEST(printf_test, width) {
+  EXPECT_PRINTF("  abc", "%5s", "abc");
+
+  // Width cannot be specified twice.
+  EXPECT_THROW_MSG(test_sprintf("%5-5d", 42), format_error,
+                   "invalid type specifier");
+
+  EXPECT_THROW_MSG(test_sprintf(format("%{}d", big_num), 42), format_error,
+                   "number is too big");
+  EXPECT_THROW_MSG(test_sprintf(format("%1${}d", big_num), 42), format_error,
+                   "number is too big");
+}
+
+TEST(printf_test, dynamic_width) {
+  EXPECT_EQ("   42", test_sprintf("%*d", 5, 42));
+  EXPECT_EQ("42   ", test_sprintf("%*d", -5, 42));
+  EXPECT_THROW_MSG(test_sprintf("%*d", 5.0, 42), format_error,
+                   "width is not integer");
+  EXPECT_THROW_MSG(test_sprintf("%*d"), format_error, "argument not found");
+  EXPECT_THROW_MSG(test_sprintf("%*d", big_num, 42), format_error,
+                   "number is too big");
+}
+
+TEST(printf_test, int_precision) {
+  EXPECT_PRINTF("00042", "%.5d", 42);
+  EXPECT_PRINTF("-00042", "%.5d", -42);
+  EXPECT_PRINTF("00042", "%.5x", 0x42);
+  EXPECT_PRINTF("0x00042", "%#.5x", 0x42);
+  EXPECT_PRINTF("00042", "%.5o", 042);
+  EXPECT_PRINTF("00042", "%#.5o", 042);
+
+  EXPECT_PRINTF("  00042", "%7.5d", 42);
+  EXPECT_PRINTF("  00042", "%7.5x", 0x42);
+  EXPECT_PRINTF("   0x00042", "%#10.5x", 0x42);
+  EXPECT_PRINTF("  00042", "%7.5o", 042);
+  EXPECT_PRINTF("     00042", "%#10.5o", 042);
+
+  EXPECT_PRINTF("00042  ", "%-7.5d", 42);
+  EXPECT_PRINTF("00042  ", "%-7.5x", 0x42);
+  EXPECT_PRINTF("0x00042   ", "%-#10.5x", 0x42);
+  EXPECT_PRINTF("00042  ", "%-7.5o", 042);
+  EXPECT_PRINTF("00042     ", "%-#10.5o", 042);
+}
+
+TEST(printf_test, float_precision) {
+  char buffer[256];
+  safe_sprintf(buffer, "%.3e", 1234.5678);
+  EXPECT_PRINTF(buffer, "%.3e", 1234.5678);
+  EXPECT_PRINTF("1234.568", "%.3f", 1234.5678);
+  EXPECT_PRINTF("1.23e+03", "%.3g", 1234.5678);
+  safe_sprintf(buffer, "%.3a", 1234.5678);
+  EXPECT_PRINTF(buffer, "%.3a", 1234.5678);
+}
+
+TEST(printf_test, string_precision) {
+  char test[] = {'H', 'e', 'l', 'l', 'o'};
+  EXPECT_EQ(fmt::sprintf("%.4s", test), "Hell");
+}
+
+TEST(printf_test, ignore_precision_for_non_numeric_arg) {
+  EXPECT_PRINTF("abc", "%.5s", "abc");
+}
+
+TEST(printf_test, dynamic_precision) {
+  EXPECT_EQ("00042", test_sprintf("%.*d", 5, 42));
+  EXPECT_EQ("42", test_sprintf("%.*d", -5, 42));
+  EXPECT_THROW_MSG(test_sprintf("%.*d", 5.0, 42), format_error,
+                   "precision is not integer");
+  EXPECT_THROW_MSG(test_sprintf("%.*d"), format_error, "argument not found");
+  EXPECT_THROW_MSG(test_sprintf("%.*d", big_num, 42), format_error,
+                   "number is too big");
+  if (sizeof(long long) != sizeof(int)) {
+    long long prec = static_cast<long long>(INT_MIN) - 1;
+    EXPECT_THROW_MSG(test_sprintf("%.*d", prec, 42), format_error,
+                     "number is too big");
+  }
+}
+
+template <typename T> struct make_signed { typedef T type; };
+
+#define SPECIALIZE_MAKE_SIGNED(T, S) \
+  template <> struct make_signed<T> { typedef S type; }
+
+SPECIALIZE_MAKE_SIGNED(char, signed char);
+SPECIALIZE_MAKE_SIGNED(unsigned char, signed char);
+SPECIALIZE_MAKE_SIGNED(unsigned short, short);
+SPECIALIZE_MAKE_SIGNED(unsigned, int);
+SPECIALIZE_MAKE_SIGNED(unsigned long, long);
+SPECIALIZE_MAKE_SIGNED(unsigned long long, long long);
+
+// Test length format specifier ``length_spec``.
+template <typename T, typename U>
+void test_length(const char* length_spec, U value) {
+  long long signed_value = 0;
+  unsigned long long unsigned_value = 0;
+  // Apply integer promotion to the argument.
+  unsigned long long max = max_value<U>();
+  using fmt::detail::const_check;
+  if (const_check(max <= static_cast<unsigned>(max_value<int>()))) {
+    signed_value = static_cast<int>(value);
+    unsigned_value = static_cast<unsigned long long>(value);
+  } else if (const_check(max <= max_value<unsigned>())) {
+    signed_value = static_cast<unsigned>(value);
+    unsigned_value = static_cast<unsigned long long>(value);
+  }
+  if (sizeof(U) <= sizeof(int) && sizeof(int) < sizeof(T)) {
+    signed_value = static_cast<long long>(value);
+    unsigned_value = static_cast<unsigned long long>(
+        static_cast<typename std::make_unsigned<unsigned>::type>(value));
+  } else {
+    signed_value = static_cast<typename make_signed<T>::type>(value);
+    unsigned_value = static_cast<typename std::make_unsigned<T>::type>(value);
+  }
+  std::ostringstream os;
+  os << signed_value;
+  EXPECT_PRINTF(os.str(), fmt::format("%{}d", length_spec), value);
+  EXPECT_PRINTF(os.str(), fmt::format("%{}i", length_spec), value);
+  os.str("");
+  os << unsigned_value;
+  EXPECT_PRINTF(os.str(), fmt::format("%{}u", length_spec), value);
+  os.str("");
+  os << std::oct << unsigned_value;
+  EXPECT_PRINTF(os.str(), fmt::format("%{}o", length_spec), value);
+  os.str("");
+  os << std::hex << unsigned_value;
+  EXPECT_PRINTF(os.str(), fmt::format("%{}x", length_spec), value);
+  os.str("");
+  os << std::hex << std::uppercase << unsigned_value;
+  EXPECT_PRINTF(os.str(), fmt::format("%{}X", length_spec), value);
+}
+
+template <typename T> void test_length(const char* length_spec) {
+  T min = std::numeric_limits<T>::min(), max = max_value<T>();
+  test_length<T>(length_spec, 42);
+  test_length<T>(length_spec, -42);
+  test_length<T>(length_spec, min);
+  test_length<T>(length_spec, max);
+  long long long_long_min = std::numeric_limits<long long>::min();
+  if (static_cast<long long>(min) > long_long_min)
+    test_length<T>(length_spec, static_cast<long long>(min) - 1);
+  unsigned long long long_long_max = max_value<long long>();
+  if (static_cast<unsigned long long>(max) < long_long_max)
+    test_length<T>(length_spec, static_cast<long long>(max) + 1);
+  test_length<T>(length_spec, std::numeric_limits<short>::min());
+  test_length<T>(length_spec, max_value<unsigned short>());
+  test_length<T>(length_spec, std::numeric_limits<int>::min());
+  test_length<T>(length_spec, max_value<int>());
+  test_length<T>(length_spec, std::numeric_limits<unsigned>::min());
+  test_length<T>(length_spec, max_value<unsigned>());
+  test_length<T>(length_spec, std::numeric_limits<long long>::min());
+  test_length<T>(length_spec, max_value<long long>());
+  test_length<T>(length_spec, std::numeric_limits<unsigned long long>::min());
+  test_length<T>(length_spec, max_value<unsigned long long>());
+}
+
+TEST(printf_test, length) {
+  test_length<char>("hh");
+  test_length<signed char>("hh");
+  test_length<unsigned char>("hh");
+  test_length<short>("h");
+  test_length<unsigned short>("h");
+  test_length<long>("l");
+  test_length<unsigned long>("l");
+  test_length<long long>("ll");
+  test_length<unsigned long long>("ll");
+  test_length<intmax_t>("j");
+  test_length<size_t>("z");
+  test_length<std::ptrdiff_t>("t");
+  long double max = max_value<long double>();
+  EXPECT_PRINTF(fmt::format("{:.6}", max), "%g", max);
+  EXPECT_PRINTF(fmt::format("{:.6}", max), "%Lg", max);
+}
+
+TEST(printf_test, bool) {
+  EXPECT_PRINTF("1", "%d", true);
+  EXPECT_PRINTF("true", "%s", true);
+}
+
+TEST(printf_test, int) {
+  EXPECT_PRINTF("-42", "%d", -42);
+  EXPECT_PRINTF("-42", "%i", -42);
+  unsigned u = 0 - 42u;
+  EXPECT_PRINTF(fmt::format("{}", u), "%u", -42);
+  EXPECT_PRINTF(fmt::format("{:o}", u), "%o", -42);
+  EXPECT_PRINTF(fmt::format("{:x}", u), "%x", -42);
+  EXPECT_PRINTF(fmt::format("{:X}", u), "%X", -42);
+}
+
+TEST(printf_test, long_long) {
+  // fmt::printf allows passing long long arguments to %d without length
+  // specifiers.
+  long long max = max_value<long long>();
+  EXPECT_PRINTF(fmt::format("{}", max), "%d", max);
+}
+
+TEST(printf_test, float) {
+  EXPECT_PRINTF("392.650000", "%f", 392.65);
+  EXPECT_PRINTF("392.65", "%.2f", 392.65);
+  EXPECT_PRINTF("392.6", "%.1f", 392.65);
+  EXPECT_PRINTF("393", "%.f", 392.65);
+  EXPECT_PRINTF("392.650000", "%F", 392.65);
+  char buffer[256];
+  safe_sprintf(buffer, "%e", 392.65);
+  EXPECT_PRINTF(buffer, "%e", 392.65);
+  safe_sprintf(buffer, "%E", 392.65);
+  EXPECT_PRINTF(buffer, "%E", 392.65);
+  EXPECT_PRINTF("392.65", "%g", 392.65);
+  EXPECT_PRINTF("392.65", "%G", 392.65);
+  EXPECT_PRINTF("392", "%g", 392.0);
+  EXPECT_PRINTF("392", "%G", 392.0);
+  EXPECT_PRINTF("4.56e-07", "%g", 0.000000456);
+  safe_sprintf(buffer, "%a", -392.65);
+  EXPECT_EQ(buffer, format("{:a}", -392.65));
+  safe_sprintf(buffer, "%A", -392.65);
+  EXPECT_EQ(buffer, format("{:A}", -392.65));
+}
+
+TEST(printf_test, inf) {
+  double inf = std::numeric_limits<double>::infinity();
+  for (const char* type = "fega"; *type; ++type) {
+    EXPECT_PRINTF("inf", fmt::format("%{}", *type), inf);
+    char upper = static_cast<char>(std::toupper(*type));
+    EXPECT_PRINTF("INF", fmt::format("%{}", upper), inf);
+  }
+}
+
+TEST(printf_test, char) {
+  EXPECT_PRINTF("x", "%c", 'x');
+  int max = max_value<int>();
+  EXPECT_PRINTF(fmt::format("{}", static_cast<char>(max)), "%c", max);
+  // EXPECT_PRINTF("x", "%lc", L'x');
+  EXPECT_PRINTF(L"x", L"%c", L'x');
+  EXPECT_PRINTF(fmt::format(L"{}", static_cast<wchar_t>(max)), L"%c", max);
+}
+
+TEST(printf_test, string) {
+  EXPECT_PRINTF("abc", "%s", "abc");
+  const char* null_str = nullptr;
+  EXPECT_PRINTF("(null)", "%s", null_str);
+  EXPECT_PRINTF("    (null)", "%10s", null_str);
+  EXPECT_PRINTF(L"abc", L"%s", L"abc");
+  const wchar_t* null_wstr = nullptr;
+  EXPECT_PRINTF(L"(null)", L"%s", null_wstr);
+  EXPECT_PRINTF(L"    (null)", L"%10s", null_wstr);
+}
+
+TEST(printf_test, pointer) {
+  int n;
+  void* p = &n;
+  EXPECT_PRINTF(fmt::format("{}", p), "%p", p);
+  p = nullptr;
+  EXPECT_PRINTF("(nil)", "%p", p);
+  EXPECT_PRINTF("     (nil)", "%10p", p);
+  const char* s = "test";
+  EXPECT_PRINTF(fmt::format("{:p}", s), "%p", s);
+  const char* null_str = nullptr;
+  EXPECT_PRINTF("(nil)", "%p", null_str);
+
+  p = &n;
+  EXPECT_PRINTF(fmt::format(L"{}", p), L"%p", p);
+  p = nullptr;
+  EXPECT_PRINTF(L"(nil)", L"%p", p);
+  EXPECT_PRINTF(L"     (nil)", L"%10p", p);
+  const wchar_t* w = L"test";
+  EXPECT_PRINTF(fmt::format(L"{:p}", w), L"%p", w);
+  const wchar_t* null_wstr = nullptr;
+  EXPECT_PRINTF(L"(nil)", L"%p", null_wstr);
+}
+
+enum test_enum { answer = 42 };
+
+TEST(printf_test, enum) {
+  EXPECT_PRINTF("42", "%d", answer);
+  volatile test_enum volatile_enum = answer;
+  EXPECT_PRINTF("42", "%d", volatile_enum);
+}
+
+#if FMT_USE_FCNTL
+TEST(printf_test, examples) {
+  const char* weekday = "Thursday";
+  const char* month = "August";
+  int day = 21;
+  EXPECT_WRITE(stdout, fmt::printf("%1$s, %3$d %2$s", weekday, month, day),
+               "Thursday, 21 August");
+}
+
+TEST(printf_test, printf_error) {
+  fmt::file read_end, write_end;
+  fmt::file::pipe(read_end, write_end);
+  int result = fmt::fprintf(read_end.fdopen("r").get(), "test");
+  EXPECT_LT(result, 0);
+}
+#endif
+
+TEST(printf_test, wide_string) {
+  EXPECT_EQ(L"abc", fmt::sprintf(L"%s", L"abc"));
+}
+
+TEST(printf_test, printf_custom) {
+  EXPECT_EQ("abc", test_sprintf("%s", test_string("abc")));
+}
+
+TEST(printf_test, vprintf) {
+  fmt::format_arg_store<fmt::printf_context, int> as{42};
+  fmt::basic_format_args<fmt::printf_context> args(as);
+  EXPECT_EQ(fmt::vsprintf("%d", args), "42");
+  EXPECT_WRITE(stdout, fmt::vprintf("%d", args), "42");
+  EXPECT_WRITE(stdout, fmt::vfprintf(stdout, "%d", args), "42");
+}
+
+template <typename... Args>
+void check_format_string_regression(fmt::string_view s, const Args&... args) {
+  fmt::sprintf(s, args...);
+}
+
+TEST(printf_test, check_format_string_regression) {
+  check_format_string_regression("%c%s", 'x', "");
+}
+
+TEST(printf_test, fixed_large_exponent) {
+  EXPECT_EQ("1000000000000000000000", fmt::sprintf("%.*f", -13, 1e21));
+}
+
+TEST(printf_test, vsprintf_make_args_example) {
+  fmt::format_arg_store<fmt::printf_context, int, const char*> as{42,
+                                                                  "something"};
+  fmt::basic_format_args<fmt::printf_context> args(as);
+  EXPECT_EQ("[42] something happened", fmt::vsprintf("[%d] %s happened", args));
+  auto as2 = fmt::make_printf_args(42, "something");
+  fmt::basic_format_args<fmt::printf_context> args2(as2);
+  EXPECT_EQ("[42] something happened",
+            fmt::vsprintf("[%d] %s happened", args2));
+  EXPECT_EQ("[42] something happened",
+            fmt::vsprintf("[%d] %s happened",
+                          {fmt::make_printf_args(42, "something")}));
+}
+
+TEST(printf_test, vsprintf_make_wargs_example) {
+  fmt::format_arg_store<fmt::wprintf_context, int, const wchar_t*> as{
+      42, L"something"};
+  fmt::basic_format_args<fmt::wprintf_context> args(as);
+  EXPECT_EQ(L"[42] something happened",
+            fmt::vsprintf(L"[%d] %s happened", args));
+  auto as2 = fmt::make_wprintf_args(42, L"something");
+  fmt::basic_format_args<fmt::wprintf_context> args2(as2);
+  EXPECT_EQ(L"[42] something happened",
+            fmt::vsprintf(L"[%d] %s happened", args2));
+  EXPECT_EQ(L"[42] something happened",
+            fmt::vsprintf(L"[%d] %s happened",
+                          {fmt::make_wprintf_args(42, L"something")}));
+}
diff --git a/3rdparty/fmt/test/ranges-odr-test.cc b/3rdparty/fmt/test/ranges-odr-test.cc
new file mode 100644
index 00000000..031354d3
--- /dev/null
+++ b/3rdparty/fmt/test/ranges-odr-test.cc
@@ -0,0 +1,17 @@
+// Formatting library for C++ - the core API
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include <vector>
+
+#include "fmt/ranges.h"
+#include "gtest/gtest.h"
+
+// call fmt::format from another translation unit to test ODR
+TEST(ranges_odr_test, format_vector) {
+  auto v = std::vector<int>{1, 2, 3, 5, 7, 11};
+  EXPECT_EQ(fmt::format("{}", v), "[1, 2, 3, 5, 7, 11]");
+}
diff --git a/3rdparty/fmt/test/ranges-test.cc b/3rdparty/fmt/test/ranges-test.cc
new file mode 100644
index 00000000..63cb8c8b
--- /dev/null
+++ b/3rdparty/fmt/test/ranges-test.cc
@@ -0,0 +1,363 @@
+// Formatting library for C++ - the core API
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+//
+// Copyright (c) 2018 - present, Remotion (Igor Schulz)
+// All Rights Reserved
+// {fmt} support for ranges, containers and types tuple interface.
+
+#include "fmt/ranges.h"
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "gtest/gtest.h"
+
+#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 601
+#  define FMT_RANGES_TEST_ENABLE_C_STYLE_ARRAY
+#endif
+
+#if !FMT_MSC_VER || FMT_MSC_VER > 1910
+#  define FMT_RANGES_TEST_ENABLE_JOIN
+#  define FMT_RANGES_TEST_ENABLE_FORMAT_STRUCT
+#endif
+
+#ifdef FMT_RANGES_TEST_ENABLE_C_STYLE_ARRAY
+TEST(ranges_test, format_array) {
+  int arr[] = {1, 2, 3, 5, 7, 11};
+  EXPECT_EQ(fmt::format("{}", arr), "[1, 2, 3, 5, 7, 11]");
+}
+
+TEST(ranges_test, format_2d_array) {
+  int arr[][2] = {{1, 2}, {3, 5}, {7, 11}};
+  EXPECT_EQ(fmt::format("{}", arr), "[[1, 2], [3, 5], [7, 11]]");
+}
+
+TEST(ranges_test, format_array_of_literals) {
+  const char* arr[] = {"1234", "abcd"};
+  EXPECT_EQ(fmt::format("{}", arr), "[\"1234\", \"abcd\"]");
+}
+#endif  // FMT_RANGES_TEST_ENABLE_C_STYLE_ARRAY
+
+TEST(ranges_test, format_vector) {
+  auto v = std::vector<int>{1, 2, 3, 5, 7, 11};
+  EXPECT_EQ(fmt::format("{}", v), "[1, 2, 3, 5, 7, 11]");
+}
+
+TEST(ranges_test, format_vector2) {
+  auto v = std::vector<std::vector<int>>{{1, 2}, {3, 5}, {7, 11}};
+  EXPECT_EQ(fmt::format("{}", v), "[[1, 2], [3, 5], [7, 11]]");
+}
+
+TEST(ranges_test, format_map) {
+  auto m = std::map<std::string, int>{{"one", 1}, {"two", 2}};
+  EXPECT_EQ(fmt::format("{}", m), "{\"one\": 1, \"two\": 2}");
+}
+
+TEST(ranges_test, format_set) {
+  EXPECT_EQ(fmt::format("{}", std::set<std::string>{"one", "two"}),
+            "{\"one\", \"two\"}");
+}
+
+TEST(ranges_test, format_pair) {
+  auto p = std::pair<int, float>(42, 1.5f);
+  EXPECT_EQ(fmt::format("{}", p), "(42, 1.5)");
+}
+
+TEST(ranges_test, format_tuple) {
+  auto t =
+      std::tuple<int, float, std::string, char>(42, 1.5f, "this is tuple", 'i');
+  EXPECT_EQ(fmt::format("{}", t), "(42, 1.5, \"this is tuple\", 'i')");
+  EXPECT_EQ(fmt::format("{}", std::tuple<>()), "()");
+}
+
+#ifdef FMT_RANGES_TEST_ENABLE_FORMAT_STRUCT
+struct tuple_like {
+  int i;
+  std::string str;
+
+  template <size_t N> fmt::enable_if_t<N == 0, int> get() const noexcept {
+    return i;
+  }
+  template <size_t N>
+  fmt::enable_if_t<N == 1, fmt::string_view> get() const noexcept {
+    return str;
+  }
+};
+
+template <size_t N>
+auto get(const tuple_like& t) noexcept -> decltype(t.get<N>()) {
+  return t.get<N>();
+}
+
+namespace std {
+template <>
+struct tuple_size<tuple_like> : std::integral_constant<size_t, 2> {};
+
+template <size_t N> struct tuple_element<N, tuple_like> {
+  using type = decltype(std::declval<tuple_like>().get<N>());
+};
+}  // namespace std
+
+TEST(ranges_test, format_struct) {
+  auto t = tuple_like{42, "foo"};
+  EXPECT_EQ(fmt::format("{}", t), "(42, \"foo\")");
+}
+#endif  // FMT_RANGES_TEST_ENABLE_FORMAT_STRUCT
+
+TEST(ranges_test, format_to) {
+  char buf[10];
+  auto end = fmt::format_to(buf, "{}", std::vector<int>{1, 2, 3});
+  *end = '\0';
+  EXPECT_STREQ(buf, "[1, 2, 3]");
+}
+
+struct path_like {
+  const path_like* begin() const;
+  const path_like* end() const;
+
+  operator std::string() const;
+};
+
+TEST(ranges_test, path_like) {
+  EXPECT_FALSE((fmt::is_range<path_like, char>::value));
+}
+
+#ifdef FMT_USE_STRING_VIEW
+struct string_like {
+  const char* begin();
+  const char* end();
+  explicit operator fmt::string_view() const { return "foo"; }
+  explicit operator std::string_view() const { return "foo"; }
+};
+
+TEST(ranges_test, format_string_like) {
+  EXPECT_EQ(fmt::format("{}", string_like()), "foo");
+}
+#endif  // FMT_USE_STRING_VIEW
+
+// A range that provides non-const only begin()/end() to test fmt::join handles
+// that.
+//
+// Some ranges (e.g. those produced by range-v3's views::filter()) can cache
+// information during iteration so they only provide non-const begin()/end().
+template <typename T> class non_const_only_range {
+ private:
+  std::vector<T> vec;
+
+ public:
+  using const_iterator = typename ::std::vector<T>::const_iterator;
+
+  template <typename... Args>
+  explicit non_const_only_range(Args&&... args)
+      : vec(std::forward<Args>(args)...) {}
+
+  const_iterator begin() { return vec.begin(); }
+  const_iterator end() { return vec.end(); }
+};
+
+template <typename T> class noncopyable_range {
+ private:
+  std::vector<T> vec;
+
+ public:
+  using const_iterator = typename ::std::vector<T>::const_iterator;
+
+  template <typename... Args>
+  explicit noncopyable_range(Args&&... args)
+      : vec(std::forward<Args>(args)...) {}
+
+  noncopyable_range(noncopyable_range const&) = delete;
+  noncopyable_range(noncopyable_range&) = delete;
+
+  const_iterator begin() const { return vec.begin(); }
+  const_iterator end() const { return vec.end(); }
+};
+
+TEST(ranges_test, range) {
+  noncopyable_range<int> w(3u, 0);
+  EXPECT_EQ(fmt::format("{}", w), "[0, 0, 0]");
+  EXPECT_EQ(fmt::format("{}", noncopyable_range<int>(3u, 0)), "[0, 0, 0]");
+
+  non_const_only_range<int> x(3u, 0);
+  EXPECT_EQ(fmt::format("{}", x), "[0, 0, 0]");
+  EXPECT_EQ(fmt::format("{}", non_const_only_range<int>(3u, 0)), "[0, 0, 0]");
+
+  auto y = std::vector<int>(3u, 0);
+  EXPECT_EQ(fmt::format("{}", y), "[0, 0, 0]");
+  EXPECT_EQ(fmt::format("{}", std::vector<int>(3u, 0)), "[0, 0, 0]");
+
+  const auto z = std::vector<int>(3u, 0);
+  EXPECT_EQ(fmt::format("{}", z), "[0, 0, 0]");
+}
+
+enum test_enum { foo };
+
+TEST(ranges_test, enum_range) {
+  auto v = std::vector<test_enum>{test_enum::foo};
+  EXPECT_EQ(fmt::format("{}", v), "[0]");
+}
+
+#if !FMT_MSC_VER
+struct unformattable {};
+
+TEST(ranges_test, unformattable_range) {
+  EXPECT_FALSE((fmt::has_formatter<std::vector<unformattable>,
+                                   fmt::format_context>::value));
+}
+#endif
+
+#ifdef FMT_RANGES_TEST_ENABLE_JOIN
+TEST(ranges_test, join_tuple) {
+  // Value tuple args.
+  auto t1 = std::tuple<char, int, float>('a', 1, 2.0f);
+  EXPECT_EQ(fmt::format("({})", fmt::join(t1, ", ")), "(a, 1, 2)");
+
+  // Testing lvalue tuple args.
+  int x = 4;
+  auto t2 = std::tuple<char, int&>('b', x);
+  EXPECT_EQ(fmt::format("{}", fmt::join(t2, " + ")), "b + 4");
+
+  // Empty tuple.
+  auto t3 = std::tuple<>();
+  EXPECT_EQ(fmt::format("{}", fmt::join(t3, "|")), "");
+
+  // Single element tuple.
+  auto t4 = std::tuple<float>(4.0f);
+  EXPECT_EQ(fmt::format("{}", fmt::join(t4, "/")), "4");
+
+#  if FMT_TUPLE_JOIN_SPECIFIERS
+  // Specs applied to each element.
+  auto t5 = std::tuple<int, int, long>(-3, 100, 1);
+  EXPECT_EQ(fmt::format("{:+03}", fmt::join(t5, ", ")), "-03, +100, +01");
+
+  auto t6 = std::tuple<float, double, long double>(3, 3.14, 3.1415);
+  EXPECT_EQ(fmt::format("{:5.5f}", fmt::join(t6, ", ")),
+            "3.00000, 3.14000, 3.14150");
+
+  // Testing lvalue tuple args.
+  int y = -1;
+  auto t7 = std::tuple<int, int&, const int&>(3, y, y);
+  EXPECT_EQ(fmt::format("{:03}", fmt::join(t7, ", ")), "003, -01, -01");
+#  endif
+}
+
+TEST(ranges_test, join_initializer_list) {
+  EXPECT_EQ(fmt::format("{}", fmt::join({1, 2, 3}, ", ")), "1, 2, 3");
+  EXPECT_EQ(fmt::format("{}", fmt::join({"fmt", "rocks", "!"}, " ")),
+            "fmt rocks !");
+}
+
+struct zstring_sentinel {};
+
+bool operator==(const char* p, zstring_sentinel) { return *p == '\0'; }
+bool operator!=(const char* p, zstring_sentinel) { return *p != '\0'; }
+
+struct zstring {
+  const char* p;
+  const char* begin() const { return p; }
+  zstring_sentinel end() const { return {}; }
+};
+
+#  ifdef __cpp_lib_ranges
+struct cpp20_only_range {
+  struct iterator {
+    int val = 0;
+
+    using value_type = int;
+    using difference_type = std::ptrdiff_t;
+    using iterator_concept = std::input_iterator_tag;
+
+    iterator() = default;
+    iterator(int i) : val(i) {}
+    int operator*() const { return val; }
+    iterator& operator++() {
+      ++val;
+      return *this;
+    }
+    void operator++(int) { ++*this; }
+    bool operator==(const iterator& rhs) const { return val == rhs.val; }
+  };
+
+  int lo;
+  int hi;
+
+  iterator begin() const { return iterator(lo); }
+  iterator end() const { return iterator(hi); }
+};
+
+static_assert(std::input_iterator<cpp20_only_range::iterator>);
+#  endif
+
+TEST(ranges_test, join_sentinel) {
+  auto hello = zstring{"hello"};
+  EXPECT_EQ(fmt::format("{}", hello), "['h', 'e', 'l', 'l', 'o']");
+  EXPECT_EQ(fmt::format("{}", fmt::join(hello, "_")), "h_e_l_l_o");
+}
+
+TEST(ranges_test, join_range) {
+  noncopyable_range<int> w(3u, 0);
+  EXPECT_EQ(fmt::format("{}", fmt::join(w, ",")), "0,0,0");
+  EXPECT_EQ(fmt::format("{}", fmt::join(noncopyable_range<int>(3u, 0), ",")),
+            "0,0,0");
+
+  non_const_only_range<int> x(3u, 0);
+  EXPECT_EQ(fmt::format("{}", fmt::join(x, ",")), "0,0,0");
+  EXPECT_EQ(fmt::format("{}", fmt::join(non_const_only_range<int>(3u, 0), ",")),
+            "0,0,0");
+
+  auto y = std::vector<int>(3u, 0);
+  EXPECT_EQ(fmt::format("{}", fmt::join(y, ",")), "0,0,0");
+  EXPECT_EQ(fmt::format("{}", fmt::join(std::vector<int>(3u, 0), ",")),
+            "0,0,0");
+
+  const auto z = std::vector<int>(3u, 0);
+  EXPECT_EQ(fmt::format("{}", fmt::join(z, ",")), "0,0,0");
+
+#  ifdef __cpp_lib_ranges
+  EXPECT_EQ(fmt::format("{}", cpp20_only_range{.lo = 0, .hi = 5}),
+            "[0, 1, 2, 3, 4]");
+  EXPECT_EQ(
+      fmt::format("{}", fmt::join(cpp20_only_range{.lo = 0, .hi = 5}, ",")),
+      "0,1,2,3,4");
+#  endif
+}
+#endif  // FMT_RANGES_TEST_ENABLE_JOIN
+
+TEST(ranges_test, is_printable) {
+  using fmt::detail::is_printable;
+  EXPECT_TRUE(is_printable(0x0323));
+  EXPECT_FALSE(is_printable(0x0378));
+  EXPECT_FALSE(is_printable(0x110000));
+}
+
+TEST(ranges_test, escape_string) {
+  using vec = std::vector<std::string>;
+  EXPECT_EQ(fmt::format("{}", vec{"\n\r\t\"\\"}), "[\"\\n\\r\\t\\\"\\\\\"]");
+  EXPECT_EQ(fmt::format("{}", vec{"\x07"}), "[\"\\x07\"]");
+  EXPECT_EQ(fmt::format("{}", vec{"\x7f"}), "[\"\\x7f\"]");
+  EXPECT_EQ(fmt::format("{}", vec{"n\xcc\x83"}), "[\"n\xcc\x83\"]");
+
+  if (fmt::detail::is_utf8()) {
+    EXPECT_EQ(fmt::format("{}", vec{"\xcd\xb8"}), "[\"\\u0378\"]");
+    // Unassigned Unicode code points.
+    EXPECT_EQ(fmt::format("{}", vec{"\xf0\xaa\x9b\x9e"}), "[\"\\U0002a6de\"]");
+    EXPECT_EQ(fmt::format("{}", vec{"\xf4\x8f\xbf\xc0"}),
+              "[\"\\xf4\\x8f\\xbf\\xc0\"]");
+  }
+}
+
+#ifdef FMT_USE_STRING_VIEW
+struct convertible_to_string_view {
+  operator std::string_view() const { return "foo"; }
+};
+
+TEST(ranges_test, escape_convertible_to_string_view) {
+  EXPECT_EQ(fmt::format("{}", std::vector<convertible_to_string_view>(1)),
+            "[\"foo\"]");
+}
+#endif  // FMT_USE_STRING_VIEW
diff --git a/3rdparty/fmt/test/scan-test.cc b/3rdparty/fmt/test/scan-test.cc
new file mode 100644
index 00000000..7e327ea3
--- /dev/null
+++ b/3rdparty/fmt/test/scan-test.cc
@@ -0,0 +1,116 @@
+// Formatting library for C++ - scanning API test
+//
+// Copyright (c) 2019 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "scan.h"
+
+#include <time.h>
+
+#include <climits>
+
+#include "gmock/gmock.h"
+#include "gtest-extra.h"
+
+TEST(scan_test, read_text) {
+  auto s = fmt::string_view("foo");
+  auto end = fmt::scan(s, "foo");
+  EXPECT_EQ(end, s.end());
+  EXPECT_THROW_MSG(fmt::scan("fob", "foo"), fmt::format_error, "invalid input");
+}
+
+TEST(scan_test, read_int) {
+  auto n = int();
+  fmt::scan("42", "{}", n);
+  EXPECT_EQ(n, 42);
+  fmt::scan("-42", "{}", n);
+  EXPECT_EQ(n, -42);
+}
+
+TEST(scan_test, read_longlong) {
+  long long n = 0;
+  fmt::scan("42", "{}", n);
+  EXPECT_EQ(n, 42);
+  fmt::scan("-42", "{}", n);
+  EXPECT_EQ(n, -42);
+}
+
+TEST(scan_test, read_uint) {
+  auto n = unsigned();
+  fmt::scan("42", "{}", n);
+  EXPECT_EQ(n, 42);
+  EXPECT_THROW_MSG(fmt::scan("-42", "{}", n), fmt::format_error,
+                   "invalid input");
+}
+
+TEST(scan_test, read_ulonglong) {
+  unsigned long long n = 0;
+  fmt::scan("42", "{}", n);
+  EXPECT_EQ(n, 42);
+  EXPECT_THROW_MSG(fmt::scan("-42", "{}", n), fmt::format_error,
+                   "invalid input");
+}
+
+TEST(scan_test, read_string) {
+  auto s = std::string();
+  fmt::scan("foo", "{}", s);
+  EXPECT_EQ(s, "foo");
+}
+
+TEST(scan_test, read_string_view) {
+  auto s = fmt::string_view();
+  fmt::scan("foo", "{}", s);
+  EXPECT_EQ(s, "foo");
+}
+
+#ifndef _WIN32
+namespace fmt {
+template <> struct scanner<tm> {
+  std::string format;
+
+  scan_parse_context::iterator parse(scan_parse_context& ctx) {
+    auto it = ctx.begin();
+    if (it != ctx.end() && *it == ':') ++it;
+    auto end = it;
+    while (end != ctx.end() && *end != '}') ++end;
+    format.reserve(detail::to_unsigned(end - it + 1));
+    format.append(it, end);
+    format.push_back('\0');
+    return end;
+  }
+
+  template <class ScanContext>
+  typename ScanContext::iterator scan(tm& t, ScanContext& ctx) {
+    auto result = strptime(ctx.begin(), format.c_str(), &t);
+    if (!result) throw format_error("failed to parse time");
+    return result;
+  }
+};
+}  // namespace fmt
+
+TEST(scan_test, read_custom) {
+  auto input = "Date: 1985-10-25";
+  auto t = tm();
+  fmt::scan(input, "Date: {0:%Y-%m-%d}", t);
+  EXPECT_EQ(t.tm_year, 85);
+  EXPECT_EQ(t.tm_mon, 9);
+  EXPECT_EQ(t.tm_mday, 25);
+}
+#endif
+
+TEST(scan_test, invalid_format) {
+  EXPECT_THROW_MSG(fmt::scan("", "{}"), fmt::format_error,
+                   "argument index out of range");
+  EXPECT_THROW_MSG(fmt::scan("", "{"), fmt::format_error,
+                   "invalid format string");
+}
+
+TEST(scan_test, example) {
+  auto key = std::string();
+  auto value = int();
+  fmt::scan("answer = 42", "{} = {}", key, value);
+  EXPECT_EQ(key, "answer");
+  EXPECT_EQ(value, 42);
+}
diff --git a/3rdparty/fmt/test/scan.h b/3rdparty/fmt/test/scan.h
new file mode 100644
index 00000000..41748ae8
--- /dev/null
+++ b/3rdparty/fmt/test/scan.h
@@ -0,0 +1,241 @@
+// Formatting library for C++ - scanning API proof of concept
+//
+// Copyright (c) 2019 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include <array>
+#include <cassert>
+#include <climits>
+
+#include "fmt/format.h"
+
+FMT_BEGIN_NAMESPACE
+template <typename T, typename Char = char> struct scanner {
+  // A deleted default constructor indicates a disabled scanner.
+  scanner() = delete;
+};
+
+class scan_parse_context {
+ private:
+  string_view format_;
+
+ public:
+  using iterator = string_view::iterator;
+
+  explicit FMT_CONSTEXPR scan_parse_context(string_view format)
+      : format_(format) {}
+
+  FMT_CONSTEXPR iterator begin() const { return format_.begin(); }
+  FMT_CONSTEXPR iterator end() const { return format_.end(); }
+
+  void advance_to(iterator it) {
+    format_.remove_prefix(detail::to_unsigned(it - begin()));
+  }
+};
+
+struct scan_context {
+ private:
+  string_view input_;
+
+ public:
+  using iterator = const char*;
+
+  explicit scan_context(string_view input) : input_(input) {}
+
+  iterator begin() const { return input_.data(); }
+  iterator end() const { return begin() + input_.size(); }
+
+  void advance_to(iterator it) {
+    input_.remove_prefix(detail::to_unsigned(it - begin()));
+  }
+};
+
+namespace detail {
+enum class scan_type {
+  none_type,
+  int_type,
+  uint_type,
+  long_long_type,
+  ulong_long_type,
+  string_type,
+  string_view_type,
+  custom_type
+};
+
+struct custom_scan_arg {
+  void* value;
+  void (*scan)(void* arg, scan_parse_context& parse_ctx, scan_context& ctx);
+};
+
+class scan_arg {
+ public:
+  scan_type type;
+  union {
+    int* int_value;
+    unsigned* uint_value;
+    long long* long_long_value;
+    unsigned long long* ulong_long_value;
+    std::string* string;
+    fmt::string_view* string_view;
+    custom_scan_arg custom;
+    // TODO: more types
+  };
+
+  scan_arg() : type(scan_type::none_type) {}
+  scan_arg(int& value) : type(scan_type::int_type), int_value(&value) {}
+  scan_arg(unsigned& value) : type(scan_type::uint_type), uint_value(&value) {}
+  scan_arg(long long& value)
+      : type(scan_type::long_long_type), long_long_value(&value) {}
+  scan_arg(unsigned long long& value)
+      : type(scan_type::ulong_long_type), ulong_long_value(&value) {}
+  scan_arg(std::string& value) : type(scan_type::string_type), string(&value) {}
+  scan_arg(fmt::string_view& value)
+      : type(scan_type::string_view_type), string_view(&value) {}
+  template <typename T> scan_arg(T& value) : type(scan_type::custom_type) {
+    custom.value = &value;
+    custom.scan = scan_custom_arg<T>;
+  }
+
+ private:
+  template <typename T>
+  static void scan_custom_arg(void* arg, scan_parse_context& parse_ctx,
+                              scan_context& ctx) {
+    scanner<T> s;
+    parse_ctx.advance_to(s.parse(parse_ctx));
+    ctx.advance_to(s.scan(*static_cast<T*>(arg), ctx));
+  }
+};
+}  // namespace detail
+
+struct scan_args {
+  int size;
+  const detail::scan_arg* data;
+
+  template <size_t N>
+  scan_args(const std::array<detail::scan_arg, N>& store)
+      : size(N), data(store.data()) {
+    static_assert(N < INT_MAX, "too many arguments");
+  }
+};
+
+namespace detail {
+
+struct scan_handler : error_handler {
+ private:
+  scan_parse_context parse_ctx_;
+  scan_context scan_ctx_;
+  scan_args args_;
+  int next_arg_id_;
+  scan_arg arg_;
+
+  template <typename T = unsigned> T read_uint() {
+    T value = 0;
+    auto it = scan_ctx_.begin(), end = scan_ctx_.end();
+    while (it != end) {
+      char c = *it++;
+      if (c < '0' || c > '9') on_error("invalid input");
+      // TODO: check overflow
+      value = value * 10 + static_cast<unsigned>(c - '0');
+    }
+    scan_ctx_.advance_to(it);
+    return value;
+  }
+
+  template <typename T = int> T read_int() {
+    auto it = scan_ctx_.begin(), end = scan_ctx_.end();
+    bool negative = it != end && *it == '-';
+    if (negative) ++it;
+    scan_ctx_.advance_to(it);
+    const auto value = read_uint<typename std::make_unsigned<T>::type>();
+    if (negative) return -static_cast<T>(value);
+    return static_cast<T>(value);
+  }
+
+ public:
+  scan_handler(string_view format, string_view input, scan_args args)
+      : parse_ctx_(format), scan_ctx_(input), args_(args), next_arg_id_(0) {}
+
+  const char* pos() const { return scan_ctx_.begin(); }
+
+  void on_text(const char* begin, const char* end) {
+    auto size = to_unsigned(end - begin);
+    auto it = scan_ctx_.begin();
+    if (it + size > scan_ctx_.end() ||
+        !std::equal(begin, end, make_checked(it, size))) {
+      on_error("invalid input");
+    }
+    scan_ctx_.advance_to(it + size);
+  }
+
+  FMT_CONSTEXPR int on_arg_id() { return on_arg_id(next_arg_id_++); }
+  FMT_CONSTEXPR int on_arg_id(int id) {
+    if (id >= args_.size) on_error("argument index out of range");
+    arg_ = args_.data[id];
+    return id;
+  }
+  FMT_CONSTEXPR int on_arg_id(string_view id) {
+    if (id.data()) on_error("invalid format");
+    return 0;
+  }
+
+  void on_replacement_field(int, const char*) {
+    auto it = scan_ctx_.begin(), end = scan_ctx_.end();
+    switch (arg_.type) {
+    case scan_type::int_type:
+      *arg_.int_value = read_int();
+      break;
+    case scan_type::uint_type:
+      *arg_.uint_value = read_uint();
+      break;
+    case scan_type::long_long_type:
+      *arg_.long_long_value = read_int<long long>();
+      break;
+    case scan_type::ulong_long_type:
+      *arg_.ulong_long_value = read_uint<unsigned long long>();
+      break;
+    case scan_type::string_type:
+      while (it != end && *it != ' ') arg_.string->push_back(*it++);
+      scan_ctx_.advance_to(it);
+      break;
+    case scan_type::string_view_type: {
+      auto s = it;
+      while (it != end && *it != ' ') ++it;
+      *arg_.string_view = fmt::string_view(s, to_unsigned(it - s));
+      scan_ctx_.advance_to(it);
+      break;
+    }
+    case scan_type::none_type:
+    case scan_type::custom_type:
+      assert(false);
+    }
+  }
+
+  const char* on_format_specs(int, const char* begin, const char*) {
+    if (arg_.type != scan_type::custom_type) return begin;
+    parse_ctx_.advance_to(begin);
+    arg_.custom.scan(arg_.custom.value, parse_ctx_, scan_ctx_);
+    return parse_ctx_.begin();
+  }
+};
+}  // namespace detail
+
+template <typename... Args>
+std::array<detail::scan_arg, sizeof...(Args)> make_scan_args(Args&... args) {
+  return {{args...}};
+}
+
+string_view::iterator vscan(string_view input, string_view format_str,
+                            scan_args args) {
+  detail::scan_handler h(format_str, input, args);
+  detail::parse_format_string<false>(format_str, h);
+  return input.begin() + (h.pos() - &*input.begin());
+}
+
+template <typename... Args>
+string_view::iterator scan(string_view input, string_view format_str,
+                           Args&... args) {
+  return vscan(input, format_str, make_scan_args(args...));
+}
+FMT_END_NAMESPACE
diff --git a/3rdparty/fmt/test/static-export-test/CMakeLists.txt b/3rdparty/fmt/test/static-export-test/CMakeLists.txt
new file mode 100644
index 00000000..7690d7b5
--- /dev/null
+++ b/3rdparty/fmt/test/static-export-test/CMakeLists.txt
@@ -0,0 +1,30 @@
+cmake_minimum_required(VERSION 3.1...3.18)
+
+project(fmt-link CXX)
+
+set(BUILD_SHARED_LIBS OFF)
+set(CMAKE_VISIBILITY_INLINES_HIDDEN TRUE)
+set(CMAKE_CXX_VISIBILITY_PRESET "hidden")
+
+# Broken LTO on GCC 4
+if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5)
+  set(BROKEN_LTO ON)
+endif ()
+
+if (NOT BROKEN_LTO AND CMAKE_VERSION VERSION_GREATER "3.8")
+  # CMake 3.9+
+  include(CheckIPOSupported)
+  check_ipo_supported(RESULT HAVE_IPO)
+  if (HAVE_IPO)
+    set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
+  endif ()
+endif ()
+
+add_subdirectory(../.. fmt)
+set_property(TARGET fmt PROPERTY POSITION_INDEPENDENT_CODE ON)
+
+add_library(library-test SHARED library.cc)
+target_link_libraries(library-test PRIVATE fmt::fmt)
+
+add_executable(exe-test main.cc)
+target_link_libraries(exe-test PRIVATE library-test)
diff --git a/3rdparty/fmt/test/static-export-test/library.cc b/3rdparty/fmt/test/static-export-test/library.cc
new file mode 100644
index 00000000..fe4801ba
--- /dev/null
+++ b/3rdparty/fmt/test/static-export-test/library.cc
@@ -0,0 +1,5 @@
+#include <fmt/compile.h>
+
+__attribute__((visibility("default"))) std::string foo() {
+  return fmt::format(FMT_COMPILE("foo bar {}"), 4242);
+}
diff --git a/3rdparty/fmt/test/static-export-test/main.cc b/3rdparty/fmt/test/static-export-test/main.cc
new file mode 100644
index 00000000..38f7999e
--- /dev/null
+++ b/3rdparty/fmt/test/static-export-test/main.cc
@@ -0,0 +1,6 @@
+#include <iostream>
+#include <string>
+
+extern std::string foo();
+
+int main() { std::cout << foo() << std::endl; }
diff --git a/3rdparty/fmt/test/test-assert.h b/3rdparty/fmt/test/test-assert.h
new file mode 100644
index 00000000..ab7b2bf7
--- /dev/null
+++ b/3rdparty/fmt/test/test-assert.h
@@ -0,0 +1,39 @@
+// Formatting library for C++ - test version of FMT_ASSERT
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_TEST_ASSERT_H_
+#define FMT_TEST_ASSERT_H_
+
+#include <stdexcept>
+
+void throw_assertion_failure(const char* message);
+#define FMT_ASSERT(condition, message) \
+  if (!(condition)) throw_assertion_failure(message);
+
+#include "gtest/gtest.h"
+
+class assertion_failure : public std::logic_error {
+ public:
+  explicit assertion_failure(const char* message) : std::logic_error(message) {}
+
+ private:
+  virtual void avoid_weak_vtable();
+};
+
+void assertion_failure::avoid_weak_vtable() {}
+
+// We use a separate function (rather than throw directly from FMT_ASSERT) to
+// avoid GCC's -Wterminate warning when FMT_ASSERT is used in a destructor.
+inline void throw_assertion_failure(const char* message) {
+  throw assertion_failure(message);
+}
+
+// Expects an assertion failure.
+#define EXPECT_ASSERT(stmt, message) \
+  FMT_TEST_THROW_(stmt, assertion_failure, message, GTEST_NONFATAL_FAILURE_)
+
+#endif  // FMT_TEST_ASSERT_H_
diff --git a/3rdparty/fmt/test/test-main.cc b/3rdparty/fmt/test/test-main.cc
new file mode 100644
index 00000000..268ed086
--- /dev/null
+++ b/3rdparty/fmt/test/test-main.cc
@@ -0,0 +1,44 @@
+// Formatting library for C++ - test main function.
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include <cstdlib>
+
+#include "gtest/gtest.h"
+
+#ifdef _WIN32
+#  include <windows.h>
+#endif
+
+#ifdef _MSC_VER
+#  include <crtdbg.h>
+#else
+#  define _CrtSetReportFile(a, b)
+#  define _CrtSetReportMode(a, b)
+#endif
+
+int main(int argc, char** argv) {
+#ifdef _WIN32
+  // Don't display any error dialogs. This also suppresses message boxes
+  // on assertion failures in MinGW where _set_error_mode/CrtSetReportMode
+  // doesn't help.
+  SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX |
+               SEM_NOOPENFILEERRORBOX);
+#endif
+  // Disable message boxes on assertion failures.
+  _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
+  _CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
+  _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
+  _CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
+  try {
+    testing::InitGoogleTest(&argc, argv);
+    testing::FLAGS_gtest_death_test_style = "threadsafe";
+    return RUN_ALL_TESTS();
+  } catch (...) {
+    // Catch all exceptions to make Coverity happy.
+  }
+  return EXIT_FAILURE;
+}
diff --git a/3rdparty/fmt/test/unicode-test.cc b/3rdparty/fmt/test/unicode-test.cc
new file mode 100644
index 00000000..63c828dd
--- /dev/null
+++ b/3rdparty/fmt/test/unicode-test.cc
@@ -0,0 +1,48 @@
+// Formatting library for C++ - Unicode tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include <iomanip>
+#include <locale>
+#include <vector>
+
+#include "fmt/chrono.h"
+#include "gmock/gmock.h"
+#include "util.h"  // get_locale
+
+using testing::Contains;
+
+TEST(unicode_test, is_utf8) { EXPECT_TRUE(fmt::detail::is_utf8()); }
+
+TEST(unicode_test, legacy_locale) {
+  auto loc = get_locale("ru_RU.CP1251", "Russian_Russia.1251");
+  if (loc == std::locale::classic()) return;
+
+  auto s = std::string();
+  try {
+    s = fmt::format(loc, "День недели: {:L}", fmt::weekday(1));
+  } catch (const fmt::format_error& e) {
+    // Formatting can fail due to an unsupported encoding.
+    fmt::print("Format error: {}\n", e.what());
+    return;
+  }
+
+#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 500
+  auto&& os = std::ostringstream();
+  os.imbue(loc);
+  auto tm = std::tm();
+  tm.tm_wday = 1;
+  os << std::put_time(&tm, "%a");
+  auto wd = os.str();
+  if (wd == "??") {
+    EXPECT_EQ(s, "День недели: ??");
+    fmt::print("std::locale gives ?? as a weekday.\n");
+    return;
+  }
+#endif
+  EXPECT_THAT((std::vector<std::string>{"День недели: пн", "День недели: Пн"}),
+              Contains(s));
+}
diff --git a/3rdparty/fmt/test/util.cc b/3rdparty/fmt/test/util.cc
new file mode 100644
index 00000000..f4cb74ca
--- /dev/null
+++ b/3rdparty/fmt/test/util.cc
@@ -0,0 +1,46 @@
+// Formatting library for C++ - test utilities
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "util.h"
+
+#include <cstring>
+
+const char* const file_content = "Don't panic!";
+
+fmt::buffered_file open_buffered_file(FILE** fp) {
+#if FMT_USE_FCNTL
+  fmt::file read_end, write_end;
+  fmt::file::pipe(read_end, write_end);
+  write_end.write(file_content, std::strlen(file_content));
+  write_end.close();
+  fmt::buffered_file f = read_end.fdopen("r");
+  if (fp) *fp = f.get();
+#else
+  fmt::buffered_file f("test-file", "w");
+  fputs(file_content, f.get());
+  if (fp) *fp = f.get();
+#endif
+  return f;
+}
+
+std::locale do_get_locale(const char* name) {
+  try {
+    return std::locale(name);
+  } catch (const std::runtime_error&) {
+  }
+  return std::locale::classic();
+}
+
+std::locale get_locale(const char* name, const char* alt_name) {
+  auto loc = do_get_locale(name);
+  if (loc == std::locale::classic() && alt_name) {
+    loc = do_get_locale(alt_name);
+  }
+  if (loc == std::locale::classic())
+    fmt::print(stderr, "{} locale is missing.\n", name);
+  return loc;
+}
diff --git a/3rdparty/fmt/test/util.h b/3rdparty/fmt/test/util.h
new file mode 100644
index 00000000..2e58ad95
--- /dev/null
+++ b/3rdparty/fmt/test/util.h
@@ -0,0 +1,85 @@
+// Formatting library for C++ - test utilities
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include <cstdarg>
+#include <cstdio>
+#include <locale>
+#include <string>
+
+#ifdef FMT_MODULE_TEST
+import fmt;
+#else
+#  include "fmt/os.h"
+#endif  // FMT_MODULE_TEST
+
+#ifdef _MSC_VER
+#  define FMT_VSNPRINTF vsprintf_s
+#else
+#  define FMT_VSNPRINTF vsnprintf
+#endif
+
+template <size_t SIZE>
+void safe_sprintf(char (&buffer)[SIZE], const char* format, ...) {
+  std::va_list args;
+  va_start(args, format);
+  FMT_VSNPRINTF(buffer, SIZE, format, args);
+  va_end(args);
+}
+
+extern const char* const file_content;
+
+// Opens a buffered file for reading.
+fmt::buffered_file open_buffered_file(FILE** fp = nullptr);
+
+inline FILE* safe_fopen(const char* filename, const char* mode) {
+#if defined(_WIN32) && !defined(__MINGW32__)
+  // Fix MSVC warning about "unsafe" fopen.
+  FILE* f = nullptr;
+  errno = fopen_s(&f, filename, mode);
+  return f;
+#else
+  return std::fopen(filename, mode);
+#endif
+}
+
+template <typename Char> class basic_test_string {
+ private:
+  std::basic_string<Char> value_;
+
+  static const Char empty[];
+
+ public:
+  explicit basic_test_string(const Char* value = empty) : value_(value) {}
+
+  const std::basic_string<Char>& value() const { return value_; }
+};
+
+template <typename Char> const Char basic_test_string<Char>::empty[] = {0};
+
+typedef basic_test_string<char> test_string;
+typedef basic_test_string<wchar_t> test_wstring;
+
+template <typename Char>
+std::basic_ostream<Char>& operator<<(std::basic_ostream<Char>& os,
+                                     const basic_test_string<Char>& s) {
+  os << s.value();
+  return os;
+}
+
+class date {
+  int year_, month_, day_;
+
+ public:
+  date(int year, int month, int day) : year_(year), month_(month), day_(day) {}
+
+  int year() const { return year_; }
+  int month() const { return month_; }
+  int day() const { return day_; }
+};
+
+// Returns a locale with the given name if available or classic locale othewise.
+std::locale get_locale(const char* name, const char* alt_name = nullptr);
diff --git a/3rdparty/fmt/test/xchar-test.cc b/3rdparty/fmt/test/xchar-test.cc
new file mode 100644
index 00000000..346cd212
--- /dev/null
+++ b/3rdparty/fmt/test/xchar-test.cc
@@ -0,0 +1,502 @@
+// Formatting library for C++ - formatting library tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/xchar.h"
+
+#include <complex>
+#include <cwchar>
+#include <vector>
+
+#include "fmt/chrono.h"
+#include "fmt/color.h"
+#include "fmt/ostream.h"
+#include "fmt/ranges.h"
+#include "gtest-extra.h"  // Contains
+#include "util.h"         // get_locale
+
+using fmt::detail::max_value;
+using testing::Contains;
+
+namespace test_ns {
+template <typename Char> class test_string {
+ private:
+  std::basic_string<Char> s_;
+
+ public:
+  test_string(const Char* s) : s_(s) {}
+  const Char* data() const { return s_.data(); }
+  size_t length() const { return s_.size(); }
+  operator const Char*() const { return s_.c_str(); }
+};
+
+template <typename Char>
+fmt::basic_string_view<Char> to_string_view(const test_string<Char>& s) {
+  return {s.data(), s.length()};
+}
+
+struct non_string {};
+}  // namespace test_ns
+
+template <typename T> class is_string_test : public testing::Test {};
+
+using string_char_types = testing::Types<char, wchar_t, char16_t, char32_t>;
+TYPED_TEST_SUITE(is_string_test, string_char_types);
+
+template <typename Char>
+struct derived_from_string_view : fmt::basic_string_view<Char> {};
+
+TYPED_TEST(is_string_test, is_string) {
+  EXPECT_TRUE(fmt::detail::is_string<TypeParam*>::value);
+  EXPECT_TRUE(fmt::detail::is_string<const TypeParam*>::value);
+  EXPECT_TRUE(fmt::detail::is_string<TypeParam[2]>::value);
+  EXPECT_TRUE(fmt::detail::is_string<const TypeParam[2]>::value);
+  EXPECT_TRUE(fmt::detail::is_string<std::basic_string<TypeParam>>::value);
+  EXPECT_TRUE(fmt::detail::is_string<fmt::basic_string_view<TypeParam>>::value);
+  EXPECT_TRUE(
+      fmt::detail::is_string<derived_from_string_view<TypeParam>>::value);
+  using fmt_string_view = fmt::detail::std_string_view<TypeParam>;
+  EXPECT_TRUE(std::is_empty<fmt_string_view>::value !=
+              fmt::detail::is_string<fmt_string_view>::value);
+  EXPECT_TRUE(fmt::detail::is_string<test_ns::test_string<TypeParam>>::value);
+  EXPECT_FALSE(fmt::detail::is_string<test_ns::non_string>::value);
+}
+
+// std::is_constructible is broken in MSVC until version 2015.
+#if !FMT_MSC_VER || FMT_MSC_VER >= 1900
+struct explicitly_convertible_to_wstring_view {
+  explicit operator fmt::wstring_view() const { return L"foo"; }
+};
+
+TEST(xchar_test, format_explicitly_convertible_to_wstring_view) {
+  EXPECT_EQ(L"foo",
+            fmt::format(L"{}", explicitly_convertible_to_wstring_view()));
+}
+#endif
+
+TEST(xchar_test, format) {
+  EXPECT_EQ(L"42", fmt::format(L"{}", 42));
+  EXPECT_EQ(L"4.2", fmt::format(L"{}", 4.2));
+  EXPECT_EQ(L"abc", fmt::format(L"{}", L"abc"));
+  EXPECT_EQ(L"z", fmt::format(L"{}", L'z'));
+  EXPECT_THROW(fmt::format(L"{:*\x343E}", 42), fmt::format_error);
+  EXPECT_EQ(L"true", fmt::format(L"{}", true));
+  EXPECT_EQ(L"a", fmt::format(L"{0}", 'a'));
+  EXPECT_EQ(L"a", fmt::format(L"{0}", L'a'));
+  EXPECT_EQ(L"Cyrillic letter \x42e",
+            fmt::format(L"Cyrillic letter {}", L'\x42e'));
+  EXPECT_EQ(L"abc1", fmt::format(L"{}c{}", L"ab", 1));
+}
+
+TEST(xchar_test, is_formattable) {
+  static_assert(!fmt::is_formattable<const wchar_t*>::value, "");
+}
+
+TEST(xchar_test, compile_time_string) {
+#if defined(FMT_USE_STRING_VIEW) && __cplusplus >= 201703L
+  EXPECT_EQ(L"42", fmt::format(FMT_STRING(std::wstring_view(L"{}")), 42));
+#endif
+}
+
+#if __cplusplus > 201103L
+struct custom_char {
+  int value;
+  custom_char() = default;
+
+  template <typename T>
+  constexpr custom_char(T val) : value(static_cast<int>(val)) {}
+
+  operator int() const { return value; }
+};
+
+int to_ascii(custom_char c) { return c; }
+
+FMT_BEGIN_NAMESPACE
+template <> struct is_char<custom_char> : std::true_type {};
+FMT_END_NAMESPACE
+
+TEST(xchar_test, format_custom_char) {
+  const custom_char format[] = {'{', '}', 0};
+  auto result = fmt::format(format, custom_char('x'));
+  EXPECT_EQ(result.size(), 1);
+  EXPECT_EQ(result[0], custom_char('x'));
+}
+#endif
+
+// Convert a char8_t string to std::string. Otherwise GTest will insist on
+// inserting `char8_t` NTBS into a `char` stream which is disabled by P1423.
+template <typename S> std::string from_u8str(const S& str) {
+  return std::string(str.begin(), str.end());
+}
+
+TEST(xchar_test, format_utf8_precision) {
+  using str_type = std::basic_string<fmt::detail::char8_type>;
+  auto format =
+      str_type(reinterpret_cast<const fmt::detail::char8_type*>(u8"{:.4}"));
+  auto str = str_type(reinterpret_cast<const fmt::detail::char8_type*>(
+      u8"caf\u00e9s"));  // cafés
+  auto result = fmt::format(format, str);
+  EXPECT_EQ(fmt::detail::compute_width(result), 4);
+  EXPECT_EQ(result.size(), 5);
+  EXPECT_EQ(from_u8str(result), from_u8str(str.substr(0, 5)));
+}
+
+TEST(xchar_test, format_to) {
+  auto buf = std::vector<wchar_t>();
+  fmt::format_to(std::back_inserter(buf), L"{}{}", 42, L'\0');
+  EXPECT_STREQ(buf.data(), L"42");
+}
+
+TEST(xchar_test, vformat_to) {
+  using wcontext = fmt::wformat_context;
+  fmt::basic_format_arg<wcontext> warg = fmt::detail::make_arg<wcontext>(42);
+  auto wargs = fmt::basic_format_args<wcontext>(&warg, 1);
+  auto w = std::wstring();
+  fmt::vformat_to(std::back_inserter(w), L"{}", wargs);
+  EXPECT_EQ(L"42", w);
+  w.clear();
+  fmt::vformat_to(std::back_inserter(w), FMT_STRING(L"{}"), wargs);
+  EXPECT_EQ(L"42", w);
+}
+
+TEST(format_test, wide_format_to_n) {
+  wchar_t buffer[4];
+  buffer[3] = L'x';
+  auto result = fmt::format_to_n(buffer, 3, L"{}", 12345);
+  EXPECT_EQ(5u, result.size);
+  EXPECT_EQ(buffer + 3, result.out);
+  EXPECT_EQ(L"123x", fmt::wstring_view(buffer, 4));
+  buffer[0] = L'x';
+  buffer[1] = L'x';
+  buffer[2] = L'x';
+  result = fmt::format_to_n(buffer, 3, L"{}", L'A');
+  EXPECT_EQ(1u, result.size);
+  EXPECT_EQ(buffer + 1, result.out);
+  EXPECT_EQ(L"Axxx", fmt::wstring_view(buffer, 4));
+  result = fmt::format_to_n(buffer, 3, L"{}{} ", L'B', L'C');
+  EXPECT_EQ(3u, result.size);
+  EXPECT_EQ(buffer + 3, result.out);
+  EXPECT_EQ(L"BC x", fmt::wstring_view(buffer, 4));
+}
+
+#if FMT_USE_USER_DEFINED_LITERALS
+TEST(xchar_test, format_udl) {
+  using namespace fmt::literals;
+  EXPECT_EQ(L"{}c{}"_format(L"ab", 1), fmt::format(L"{}c{}", L"ab", 1));
+}
+
+TEST(xchar_test, named_arg_udl) {
+  using namespace fmt::literals;
+  auto udl_a =
+      fmt::format(L"{first}{second}{first}{third}", L"first"_a = L"abra",
+                  L"second"_a = L"cad", L"third"_a = 99);
+  EXPECT_EQ(
+      fmt::format(L"{first}{second}{first}{third}", fmt::arg(L"first", L"abra"),
+                  fmt::arg(L"second", L"cad"), fmt::arg(L"third", 99)),
+      udl_a);
+}
+#endif  // FMT_USE_USER_DEFINED_LITERALS
+
+TEST(xchar_test, print) {
+  // Check that the wide print overload compiles.
+  if (fmt::detail::const_check(false)) fmt::print(L"test");
+}
+
+TEST(xchar_test, join) {
+  int v[3] = {1, 2, 3};
+  EXPECT_EQ(fmt::format(L"({})", fmt::join(v, v + 3, L", ")), L"(1, 2, 3)");
+  auto t = std::tuple<wchar_t, int, float>('a', 1, 2.0f);
+  EXPECT_EQ(fmt::format(L"({})", fmt::join(t, L", ")), L"(a, 1, 2)");
+}
+
+enum streamable_enum {};
+
+std::wostream& operator<<(std::wostream& os, streamable_enum) {
+  return os << L"streamable_enum";
+}
+
+enum unstreamable_enum {};
+
+TEST(xchar_test, enum) {
+  EXPECT_EQ(L"streamable_enum", fmt::format(L"{}", streamable_enum()));
+  EXPECT_EQ(L"0", fmt::format(L"{}", unstreamable_enum()));
+}
+
+TEST(xchar_test, sign_not_truncated) {
+  wchar_t format_str[] = {
+      L'{', L':',
+      '+' | static_cast<wchar_t>(1 << fmt::detail::num_bits<char>()), L'}', 0};
+  EXPECT_THROW(fmt::format(format_str, 42), fmt::format_error);
+}
+
+namespace fake_qt {
+class QString {
+ public:
+  QString(const wchar_t* s) : s_(s) {}
+  const wchar_t* utf16() const FMT_NOEXCEPT { return s_.data(); }
+  int size() const FMT_NOEXCEPT { return static_cast<int>(s_.size()); }
+
+ private:
+  std::wstring s_;
+};
+
+fmt::basic_string_view<wchar_t> to_string_view(const QString& s) FMT_NOEXCEPT {
+  return {s.utf16(), static_cast<size_t>(s.size())};
+}
+}  // namespace fake_qt
+
+TEST(format_test, format_foreign_strings) {
+  using fake_qt::QString;
+  EXPECT_EQ(fmt::format(QString(L"{}"), 42), L"42");
+  EXPECT_EQ(fmt::format(QString(L"{}"), QString(L"42")), L"42");
+}
+
+TEST(xchar_test, chrono) {
+  auto tm = std::tm();
+  tm.tm_year = 116;
+  tm.tm_mon = 3;
+  tm.tm_mday = 25;
+  tm.tm_hour = 11;
+  tm.tm_min = 22;
+  tm.tm_sec = 33;
+  EXPECT_EQ(fmt::format("The date is {:%Y-%m-%d %H:%M:%S}.", tm),
+            "The date is 2016-04-25 11:22:33.");
+  EXPECT_EQ(L"42s", fmt::format(L"{}", std::chrono::seconds(42)));
+  EXPECT_EQ(fmt::format(L"{:%F}", tm), L"2016-04-25");
+  EXPECT_EQ(fmt::format(L"{:%T}", tm), L"11:22:33");
+}
+
+std::wstring system_wcsftime(const std::wstring& format, const std::tm* timeptr,
+                             std::locale* locptr = nullptr) {
+  auto loc = locptr ? *locptr : std::locale::classic();
+  auto& facet = std::use_facet<std::time_put<wchar_t>>(loc);
+  std::wostringstream os;
+  os.imbue(loc);
+  facet.put(os, os, L' ', timeptr, format.c_str(),
+            format.c_str() + format.size());
+#ifdef _WIN32
+  // Workaround a bug in older versions of Universal CRT.
+  auto str = os.str();
+  if (str == L"-0000") str = L"+0000";
+  return str;
+#else
+  return os.str();
+#endif
+}
+
+TEST(chrono_test, time_point) {
+  auto t1 = std::chrono::system_clock::now();
+
+  std::vector<std::wstring> spec_list = {
+      L"%%",  L"%n",  L"%t",  L"%Y",  L"%EY", L"%y",  L"%Oy", L"%Ey", L"%C",
+      L"%EC", L"%G",  L"%g",  L"%b",  L"%h",  L"%B",  L"%m",  L"%Om", L"%U",
+      L"%OU", L"%W",  L"%OW", L"%V",  L"%OV", L"%j",  L"%d",  L"%Od", L"%e",
+      L"%Oe", L"%a",  L"%A",  L"%w",  L"%Ow", L"%u",  L"%Ou", L"%H",  L"%OH",
+      L"%I",  L"%OI", L"%M",  L"%OM", L"%S",  L"%OS", L"%x",  L"%Ex", L"%X",
+      L"%EX", L"%D",  L"%F",  L"%R",  L"%T",  L"%p",  L"%z",  L"%Z"};
+  spec_list.push_back(L"%Y-%m-%d %H:%M:%S");
+#ifndef _WIN32
+  // Disabled on Windows, because these formats is not consistent among
+  // platforms.
+  spec_list.insert(spec_list.end(), {L"%c", L"%Ec", L"%r"});
+#endif
+
+  for (const auto& spec : spec_list) {
+    auto t = std::chrono::system_clock::to_time_t(t1);
+    auto tm = *std::localtime(&t);
+
+    auto sys_output = system_wcsftime(spec, &tm);
+
+    auto fmt_spec = fmt::format(L"{{:{}}}", spec);
+    EXPECT_EQ(sys_output, fmt::format(fmt_spec, t1));
+    EXPECT_EQ(sys_output, fmt::format(fmt_spec, tm));
+  }
+}
+
+TEST(xchar_test, color) {
+  EXPECT_EQ(fmt::format(fg(fmt::rgb(255, 20, 30)), L"rgb(255,20,30) wide"),
+            L"\x1b[38;2;255;020;030mrgb(255,20,30) wide\x1b[0m");
+}
+
+TEST(xchar_test, ostream) {
+  std::wostringstream wos;
+  fmt::print(wos, L"Don't {}!", L"panic");
+  EXPECT_EQ(L"Don't panic!", wos.str());
+}
+
+TEST(xchar_test, to_wstring) { EXPECT_EQ(L"42", fmt::to_wstring(42)); }
+
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+template <typename Char> struct numpunct : std::numpunct<Char> {
+ protected:
+  Char do_decimal_point() const override { return '?'; }
+  std::string do_grouping() const override { return "\03"; }
+  Char do_thousands_sep() const override { return '~'; }
+};
+
+template <typename Char> struct no_grouping : std::numpunct<Char> {
+ protected:
+  Char do_decimal_point() const override { return '.'; }
+  std::string do_grouping() const override { return ""; }
+  Char do_thousands_sep() const override { return ','; }
+};
+
+template <typename Char> struct special_grouping : std::numpunct<Char> {
+ protected:
+  Char do_decimal_point() const override { return '.'; }
+  std::string do_grouping() const override { return "\03\02"; }
+  Char do_thousands_sep() const override { return ','; }
+};
+
+template <typename Char> struct small_grouping : std::numpunct<Char> {
+ protected:
+  Char do_decimal_point() const override { return '.'; }
+  std::string do_grouping() const override { return "\01"; }
+  Char do_thousands_sep() const override { return ','; }
+};
+
+TEST(locale_test, localized_double) {
+  auto loc = std::locale(std::locale(), new numpunct<char>());
+  EXPECT_EQ("1?23", fmt::format(loc, "{:L}", 1.23));
+  EXPECT_EQ("1?230000", fmt::format(loc, "{:Lf}", 1.23));
+  EXPECT_EQ("1~234?5", fmt::format(loc, "{:L}", 1234.5));
+  EXPECT_EQ("12~000", fmt::format(loc, "{:L}", 12000.0));
+}
+
+TEST(locale_test, format) {
+  auto loc = std::locale(std::locale(), new numpunct<char>());
+  EXPECT_EQ("1234567", fmt::format(std::locale(), "{:L}", 1234567));
+  EXPECT_EQ("1~234~567", fmt::format(loc, "{:L}", 1234567));
+  EXPECT_EQ("-1~234~567", fmt::format(loc, "{:L}", -1234567));
+  EXPECT_EQ("-256", fmt::format(loc, "{:L}", -256));
+  fmt::format_arg_store<fmt::format_context, int> as{1234567};
+  EXPECT_EQ("1~234~567", fmt::vformat(loc, "{:L}", fmt::format_args(as)));
+  auto s = std::string();
+  fmt::format_to(std::back_inserter(s), loc, "{:L}", 1234567);
+  EXPECT_EQ("1~234~567", s);
+
+  auto no_grouping_loc = std::locale(std::locale(), new no_grouping<char>());
+  EXPECT_EQ("1234567", fmt::format(no_grouping_loc, "{:L}", 1234567));
+
+  auto special_grouping_loc =
+      std::locale(std::locale(), new special_grouping<char>());
+  EXPECT_EQ("1,23,45,678", fmt::format(special_grouping_loc, "{:L}", 12345678));
+  EXPECT_EQ("12,345", fmt::format(special_grouping_loc, "{:L}", 12345));
+
+  auto small_grouping_loc =
+      std::locale(std::locale(), new small_grouping<char>());
+  EXPECT_EQ("4,2,9,4,9,6,7,2,9,5",
+            fmt::format(small_grouping_loc, "{:L}", max_value<uint32_t>()));
+}
+
+TEST(locale_test, format_detault_align) {
+  auto loc = std::locale({}, new special_grouping<char>());
+  EXPECT_EQ("  12,345", fmt::format(loc, "{:8L}", 12345));
+}
+
+TEST(locale_test, format_plus) {
+  auto loc = std::locale({}, new special_grouping<char>());
+  EXPECT_EQ("+100", fmt::format(loc, "{:+L}", 100));
+}
+
+TEST(locale_test, wformat) {
+  auto loc = std::locale(std::locale(), new numpunct<wchar_t>());
+  EXPECT_EQ(L"1234567", fmt::format(std::locale(), L"{:L}", 1234567));
+  EXPECT_EQ(L"1~234~567", fmt::format(loc, L"{:L}", 1234567));
+  using wcontext = fmt::buffer_context<wchar_t>;
+  fmt::format_arg_store<wcontext, int> as{1234567};
+  EXPECT_EQ(L"1~234~567",
+            fmt::vformat(loc, L"{:L}", fmt::basic_format_args<wcontext>(as)));
+  EXPECT_EQ(L"1234567", fmt::format(std::locale("C"), L"{:L}", 1234567));
+
+  auto no_grouping_loc = std::locale(std::locale(), new no_grouping<wchar_t>());
+  EXPECT_EQ(L"1234567", fmt::format(no_grouping_loc, L"{:L}", 1234567));
+
+  auto special_grouping_loc =
+      std::locale(std::locale(), new special_grouping<wchar_t>());
+  EXPECT_EQ(L"1,23,45,678",
+            fmt::format(special_grouping_loc, L"{:L}", 12345678));
+
+  auto small_grouping_loc =
+      std::locale(std::locale(), new small_grouping<wchar_t>());
+  EXPECT_EQ(L"4,2,9,4,9,6,7,2,9,5",
+            fmt::format(small_grouping_loc, L"{:L}", max_value<uint32_t>()));
+}
+
+TEST(locale_test, double_formatter) {
+  auto loc = std::locale(std::locale(), new special_grouping<char>());
+  auto f = fmt::formatter<int>();
+  auto parse_ctx = fmt::format_parse_context("L");
+  f.parse(parse_ctx);
+  char buf[10] = {};
+  fmt::basic_format_context<char*, char> format_ctx(
+      buf, {}, fmt::detail::locale_ref(loc));
+  *f.format(12345, format_ctx) = 0;
+  EXPECT_STREQ("12,345", buf);
+}
+
+FMT_BEGIN_NAMESPACE
+template <class charT> struct formatter<std::complex<double>, charT> {
+ private:
+  detail::dynamic_format_specs<char> specs_;
+
+ public:
+  FMT_CONSTEXPR typename basic_format_parse_context<charT>::iterator parse(
+      basic_format_parse_context<charT>& ctx) {
+    using handler_type =
+        detail::dynamic_specs_handler<basic_format_parse_context<charT>>;
+    detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
+                                                detail::type::string_type);
+    auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
+    detail::parse_float_type_spec(specs_, ctx.error_handler());
+    return it;
+  }
+
+  template <class FormatContext>
+  typename FormatContext::iterator format(const std::complex<double>& c,
+                                          FormatContext& ctx) {
+    detail::handle_dynamic_spec<detail::precision_checker>(
+        specs_.precision, specs_.precision_ref, ctx);
+    auto specs = std::string();
+    if (specs_.precision > 0) specs = fmt::format(".{}", specs_.precision);
+    if (specs_.type == presentation_type::fixed_lower) specs += 'f';
+    auto real = fmt::format(ctx.locale().template get<std::locale>(),
+                            fmt::runtime("{:" + specs + "}"), c.real());
+    auto imag = fmt::format(ctx.locale().template get<std::locale>(),
+                            fmt::runtime("{:" + specs + "}"), c.imag());
+    auto fill_align_width = std::string();
+    if (specs_.width > 0) fill_align_width = fmt::format(">{}", specs_.width);
+    return format_to(ctx.out(), runtime("{:" + fill_align_width + "}"),
+                     c.real() != 0 ? fmt::format("({}+{}i)", real, imag)
+                                   : fmt::format("{}i", imag));
+  }
+};
+FMT_END_NAMESPACE
+
+TEST(locale_test, complex) {
+  std::string s = fmt::format("{}", std::complex<double>(1, 2));
+  EXPECT_EQ(s, "(1+2i)");
+  EXPECT_EQ(fmt::format("{:.2f}", std::complex<double>(1, 2)), "(1.00+2.00i)");
+  EXPECT_EQ(fmt::format("{:8}", std::complex<double>(1, 2)), "  (1+2i)");
+}
+
+TEST(locale_test, chrono_weekday) {
+  auto loc = get_locale("ru_RU.UTF-8", "Russian_Russia.1251");
+  auto loc_old = std::locale::global(loc);
+  auto mon = fmt::weekday(1);
+  EXPECT_EQ(fmt::format(L"{}", mon), L"Mon");
+  if (loc != std::locale::classic()) {
+    // {L"\x43F\x43D", L"\x41F\x43D", L"\x43F\x43D\x434", L"\x41F\x43D\x434"}
+    // {L"пн", L"Пн", L"пнд", L"Пнд"}
+    EXPECT_THAT(
+        (std::vector<std::wstring>{L"\x43F\x43D", L"\x41F\x43D",
+                                   L"\x43F\x43D\x434", L"\x41F\x43D\x434"}),
+        Contains(fmt::format(loc, L"{:L}", mon)));
+  }
+  std::locale::global(loc_old);
+}
+
+#endif  // FMT_STATIC_THOUSANDS_SEPARATOR
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d6ac2f06..edfff1ef 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -43,6 +43,7 @@ set(LIBIPC_PROJECT_DIR     ${PROJECT_SOURCE_DIR})
 # Unicode Support
 add_definitions(-DUNICODE -D_UNICODE)
 
+add_subdirectory(3rdparty/fmt)
 add_subdirectory(src)
 
 if (LIBIPC_BUILD_TESTS)
@@ -65,6 +66,7 @@ endif()
 if (LIBIPC_BUILD_BENCHMARK)
   set(BENCHMARK_ENABLE_TESTING OFF)
   add_subdirectory(3rdparty/benchmark)
+  # add_subdirectory(benchmark)
 endif()
 
 install(
diff --git a/include/libimp/result.h b/include/libimp/result.h
index 92b39db5..2fd2cb67 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -6,32 +6,124 @@
  */
 #pragma once
 
-#include <ostream>  // std::ostream
+#include <type_traits>
 #include <cstdint>
 
+#include "fmt/format.h"
+
 #include "libimp/def.h"
 #include "libimp/export.h"
 
 LIBIMP_NAMESPACE_BEG_
 
-class LIBIMP_EXPORT result {
+class LIBIMP_EXPORT result_code {
   std::uint64_t status_;
 
 public:
-  result() noexcept;
-  result(bool ok, std::uint64_t code = 0) noexcept;
+  result_code() noexcept;
+  result_code(bool ok, std::uint64_t value = 0) noexcept;
 
-  std::uint64_t code() const noexcept;
+  std::uint64_t value() const noexcept;
   bool ok() const noexcept;
 
+  std::uint64_t operator*() const noexcept {
+    return value();
+  }
+  explicit operator bool() const noexcept {
+    return ok();
+  }
+
+  friend bool operator==(result_code const &lhs, result_code const &rhs) noexcept;
+  friend bool operator!=(result_code const &lhs, result_code const &rhs) noexcept;
+};
+
+namespace detail_result {
+
+template <typename T, typename = void>
+struct default_traits;
+
+template <typename T>
+struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
+  constexpr static T value() noexcept { return 0; }
+
+  static std::uint64_t cast_to_code(T value) noexcept {
+    return static_cast<std::uint64_t>(value);
+  }
+  static T cast_from_code(std::uint64_t code) noexcept {
+    return static_cast<T>(code);
+  }
+  static T regularize(T value) noexcept {
+    return value;
+  }
+};
+
+template <typename T>
+struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
+  constexpr static T value() noexcept { return nullptr; }
+
+  static std::uint64_t cast_to_code(T value) noexcept {
+    return reinterpret_cast<std::uint64_t>(value);
+  }
+  static T cast_from_code(std::uint64_t code) noexcept {
+    return reinterpret_cast<T>(code);
+  }
+  static void *regularize(T value) noexcept {
+    return value;
+  }
+};
+
+} // namespace detail_result
+
+template <typename T, 
+          typename DefTraits = detail_result::default_traits<T>>
+class result {
+
+  result_code code_;
+
+public:
+  using default_traits_t = DefTraits;
+
+  result() noexcept = default;
+  result(bool ok, T value = default_traits_t::value())
+    : code_(ok, default_traits_t::cast_to_code(value)) {}
+
+  T value() const noexcept { return default_traits_t::cast_from_code(code_.value()); }
+  bool ok() const noexcept { return code_.ok(); }
+
+  T operator*() const noexcept {
+    return value();
+  }
   explicit operator bool() const noexcept {
     return ok();
   }
 
-  friend bool operator==(result const &lhs, result const &rhs) noexcept;
-  friend bool operator!=(result const &lhs, result const &rhs) noexcept;
+  friend bool operator==(result const &lhs, result const &rhs) noexcept { return lhs.code_ == rhs.code_; }
+  friend bool operator!=(result const &lhs, result const &rhs) noexcept { return lhs.code_ != rhs.code_; }
 
-  friend std::ostream &operator<<(std::ostream &o, result const &r) noexcept;
+  friend std::ostream &operator<<(std::ostream &o, result const &r) noexcept { return o << r.code_; }
 };
 
 LIBIMP_NAMESPACE_END_
+
+template <typename T>
+struct fmt::formatter<::LIBIMP_NAMESPACE::result<T>> {
+  constexpr auto parse(format_parse_context& ctx) {
+    return ctx.end();
+  }
+
+  template <typename FormatContext>
+  auto format(::LIBIMP_NAMESPACE::result<T> r, FormatContext &ctx) {
+    return format_to(ctx.out(), "[{}, value = {}]", 
+                    (r ? "succ" : "fail"), 
+                    ::LIBIMP_NAMESPACE::result<T>::default_traits_t::regularize(*r));
+  }
+};
+
+template <>
+struct fmt::formatter<::LIBIMP_NAMESPACE::result_code>
+          : formatter<::LIBIMP_NAMESPACE::result<std::uint64_t>> {
+  template <typename FormatContext>
+  auto format(::LIBIMP_NAMESPACE::result_code r, FormatContext &ctx) {
+    return format_to(ctx.out(), "[{}, value = {}]", (r ? "succ" : "fail"), *r);
+  }
+};
diff --git a/include/libipc/mmap.h b/include/libipc/mmap.h
index aefeb143..d2bc07f8 100644
--- a/include/libipc/mmap.h
+++ b/include/libipc/mmap.h
@@ -12,6 +12,12 @@
 
 LIBIPC_NAMESPACE_BEG_
 
+struct mmap_handle;
+using mmap_t = mmap_handle *;
 
+/**
+ * @brief Creates a new mapping in the virtual address space of the calling process.
+ */
+LIBIMP_EXPORT mmap_t mmap_open();
 
 LIBIPC_NAMESPACE_END_
diff --git a/src/libimp/CMakeLists.txt b/src/libimp/CMakeLists.txt
index f61ecf1c..65e34053 100644
--- a/src/libimp/CMakeLists.txt
+++ b/src/libimp/CMakeLists.txt
@@ -18,6 +18,8 @@ target_include_directories(${PROJECT_NAME}
   PUBLIC  ${LIBIPC_PROJECT_DIR}/include
   PRIVATE ${LIBIPC_PROJECT_DIR}/src)
 
+target_link_libraries(${PROJECT_NAME} PUBLIC fmt)
+
 install(
   TARGETS ${PROJECT_NAME}
   RUNTIME DESTINATION bin
diff --git a/src/libimp/result.cpp b/src/libimp/result.cpp
index 055703f5..e6f624b6 100644
--- a/src/libimp/result.cpp
+++ b/src/libimp/result.cpp
@@ -11,7 +11,7 @@ struct result_code_info {
 };
 
 std::uint64_t make_status(bool ok, std::uint64_t code) noexcept {
-  return horrible_cast<std::uint64_t>(result_code_info{ok ? 1ull : 0ull, code});
+  return horrible_cast<std::uint64_t>(result_code_info{(ok ? 1ull : 0ull), code});
 }
 
 result_code_info info_cast(std::uint64_t status) noexcept {
@@ -20,31 +20,26 @@ result_code_info info_cast(std::uint64_t status) noexcept {
 
 } // namespace
 
-result::result() noexcept
-  : result(false, 0) {}
+result_code::result_code() noexcept
+  : result_code(false) {}
 
-result::result(bool ok, std::uint64_t code) noexcept
+result_code::result_code(bool ok, std::uint64_t code) noexcept
   : status_(make_status(ok, code)) {}
 
-std::uint64_t result::code() const noexcept {
+std::uint64_t result_code::value() const noexcept {
   return info_cast(status_).code;
 }
 
-bool result::ok() const noexcept {
+bool result_code::ok() const noexcept {
   return info_cast(status_).ok != 0;
 }
 
-bool operator==(result const &lhs, result const &rhs) noexcept {
+bool operator==(result_code const &lhs, result_code const &rhs) noexcept {
   return lhs.status_ == rhs.status_;
 }
 
-bool operator!=(result const &lhs, result const &rhs) noexcept {
+bool operator!=(result_code const &lhs, result_code const &rhs) noexcept {
   return lhs.status_ != rhs.status_;
 }
 
-std::ostream &operator<<(std::ostream &o, result const &r) noexcept {
-  o << "[" << (r.ok() ? "succ" : "fail") << ", code = " << r.code() << "]";
-  return o;
-}
-
 LIBIMP_NAMESPACE_END_
diff --git a/test/test_result.cpp b/test/test_result.cpp
index e04c6e35..a20aaa6e 100644
--- a/test/test_result.cpp
+++ b/test/test_result.cpp
@@ -2,72 +2,76 @@
 #include <sstream>
 
 #include "gtest/gtest.h"
+#include "fmt/format.h"
 
 #include "libimp/result.h"
 
 TEST(result, ok) {
-  imp::result ret;
+  imp::result_code ret;
   EXPECT_FALSE(ret);
   EXPECT_FALSE(ret.ok());
-  EXPECT_EQ(ret.code(), 0);
+  EXPECT_EQ(ret.value(), 0);
 
   ret = {true};
   EXPECT_TRUE(ret);
   EXPECT_TRUE(ret.ok());
-  EXPECT_EQ(ret.code(), 0);
+  EXPECT_EQ(ret.value(), 0);
 
   ret = {false, 1234};
   EXPECT_FALSE(ret);
   EXPECT_FALSE(ret.ok());
-  EXPECT_EQ(ret.code(), 1234);
+  EXPECT_EQ(*ret, 1234);
 }
 
 TEST(result, code) {
-  imp::result ret(true, 1234);
+  imp::result_code ret(true, 1234);
   EXPECT_TRUE(ret);
   EXPECT_TRUE(ret.ok());
-  EXPECT_EQ(ret.code(), 1234);
+  EXPECT_EQ(ret.value(), 1234);
 
   ret = {false};
   EXPECT_FALSE(ret);
   EXPECT_FALSE(ret.ok());
-  EXPECT_EQ(ret.code(), 0);
+  EXPECT_EQ(ret.value(), 0);
 
   ret = {true, 4321};
   EXPECT_TRUE(ret);
   EXPECT_TRUE(ret.ok());
-  EXPECT_EQ(ret.code(), 4321);
+  EXPECT_EQ(ret.value(), 4321);
 }
 
 TEST(result, compare) {
-  imp::result r1, r2;
+  imp::result_code r1, r2;
   EXPECT_EQ(r1, r2);
 
-  imp::result r3(true);
+  imp::result_code r3(true);
   EXPECT_NE(r1, r3);
 
-  imp::result r4(true, 222222);
+  imp::result_code r4(true, 222222);
   EXPECT_NE(r3, r4);
 
-  imp::result r5(false, 222222);
+  imp::result_code r5(false, 222222);
   EXPECT_NE(r4, r5);
   r3 = r5;
   EXPECT_EQ(r3, r5);
 }
 
-TEST(result, print) {
-  std::stringstream ss;
-  imp::result r1;
-  ss << r1;
-  EXPECT_EQ(ss.str(), "[fail, code = 0]");
-
-  ss = {};
-  imp::result r2(true, 65537);
-  ss << r2;
-  EXPECT_EQ(ss.str(), "[succ, code = 65537]");
-
-  ss = {};
-  imp::result r3(true);
-  ss << r3;
-  EXPECT_EQ(ss.str(), "[succ, code = 0]");
+TEST(result, fmt) {
+  {
+    imp::result_code r1;
+    EXPECT_EQ(fmt::format("{}", r1), "[fail, value = 0]");
+    imp::result_code r2(true, 65537);
+    EXPECT_EQ(fmt::format("{}", r2), "[succ, value = 65537]");
+    imp::result_code r3(true);
+    EXPECT_EQ(fmt::format("{}", r3), "[succ, value = 0]");
+  }
+  {
+    imp::result<int> r1 {false, -123};
+    EXPECT_EQ(fmt::format("{}", r1), fmt::format("[fail, value = {}]", -123));
+    imp::result<void *> r2 {true, &r1};
+    EXPECT_EQ(fmt::format("{}", r2), fmt::format("[succ, value = {}]", (void *)&r1));
+    int aaa {};
+    imp::result<int *> r3 {false, &aaa};
+    EXPECT_EQ(fmt::format("{}", r3), fmt::format("[fail, value = {}]", (void *)&aaa));
+  }
 }
\ No newline at end of file

From 9e170999a163c16beea6f03a21a5c5f132cef1d3 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 15 May 2022 18:24:51 +0800
Subject: [PATCH 026/272] add: additional notes

---
 include/libimp/result.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/libimp/result.h b/include/libimp/result.h
index 2fd2cb67..43463b41 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -16,6 +16,11 @@
 
 LIBIMP_NAMESPACE_BEG_
 
+/**
+ * @brief Use the least significant (in Little-Endian) of 
+ * a 64-bit unsigned integer to indicate success or failure,
+ * so the data significant bit cannot exceed 63 bits.
+ */
 class LIBIMP_EXPORT result_code {
   std::uint64_t status_;
 

From e21da4fe2d06a1e2b66e800423854998433ebfaa Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 15 May 2022 19:20:30 +0800
Subject: [PATCH 027/272] add: [result] an additional status code can be
 returned on failure to return a pointer

---
 include/libimp/def.h    |  7 ++--
 include/libimp/result.h | 75 ++++++++++++++++++++++++++++++-----------
 include/libipc/def.h    | 15 ++++++---
 include/libipc/mmap.h   |  3 +-
 test/test_result.cpp    | 10 ++++--
 5 files changed, 79 insertions(+), 31 deletions(-)

diff --git a/include/libimp/def.h b/include/libimp/def.h
index 0b5ffb08..a0ff342d 100644
--- a/include/libimp/def.h
+++ b/include/libimp/def.h
@@ -9,10 +9,9 @@
 #include <cstddef>
 #include <cstdint>
 
-#if !defined(LIBIMP_NAMESPACE)
-# define LIBIMP_NAMESPACE imp
-#endif
-#define LIBIMP_NAMESPACE_BEG_ namespace LIBIMP_NAMESPACE {
+#define LIBIMP_               imp
+#define LIBIMP_NAMESPACE_     LIBIMP_
+#define LIBIMP_NAMESPACE_BEG_ namespace LIBIMP_NAMESPACE_ {
 #define LIBIMP_NAMESPACE_END_ }
 
 LIBIMP_NAMESPACE_BEG_
diff --git a/include/libimp/result.h b/include/libimp/result.h
index 43463b41..121e4b38 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -12,6 +12,7 @@
 #include "fmt/format.h"
 
 #include "libimp/def.h"
+#include "libimp/detect_plat.h"
 #include "libimp/export.h"
 
 LIBIMP_NAMESPACE_BEG_
@@ -26,7 +27,7 @@ class LIBIMP_EXPORT result_code {
 
 public:
   result_code() noexcept;
-  result_code(bool ok, std::uint64_t value = 0) noexcept;
+  result_code(bool ok, std::uint64_t value = {}) noexcept;
 
   std::uint64_t value() const noexcept;
   bool ok() const noexcept;
@@ -42,6 +43,11 @@ class LIBIMP_EXPORT result_code {
   friend bool operator!=(result_code const &lhs, result_code const &rhs) noexcept;
 };
 
+template <typename T, 
+          typename DefTraits = detail_result::default_traits<T>, 
+          typename = void>
+class result;
+
 namespace detail_result {
 
 template <typename T, typename = void>
@@ -57,8 +63,9 @@ struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
   static T cast_from_code(std::uint64_t code) noexcept {
     return static_cast<T>(code);
   }
-  static T regularize(T value) noexcept {
-    return value;
+  template <typename Out>
+  static auto format(result<T> const &r, Out &&out) noexcept {
+    return format_to(out, "{}", *r);
   }
 };
 
@@ -72,16 +79,19 @@ struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
   static T cast_from_code(std::uint64_t code) noexcept {
     return reinterpret_cast<T>(code);
   }
-  static void *regularize(T value) noexcept {
-    return value;
+  template <typename Out>
+  static auto format(result<T> const &r, Out &&out) noexcept {
+    if LIBIMP_LIKELY(r) {
+      return format_to(out, "{}", static_cast<void *>(*r));
+    }
+    return format_to(out, "{}, code = {}", static_cast<void *>(*r), r.code());
   }
 };
 
 } // namespace detail_result
 
-template <typename T, 
-          typename DefTraits = detail_result::default_traits<T>>
-class result {
+template <typename T, typename DefTraits>
+class result<T, DefTraits, std::enable_if_t<std::is_integral<T>::value>> {
 
   result_code code_;
 
@@ -89,7 +99,7 @@ class result {
   using default_traits_t = DefTraits;
 
   result() noexcept = default;
-  result(bool ok, T value = default_traits_t::value())
+  result(bool ok, T value = default_traits_t::value()) noexcept
     : code_(ok, default_traits_t::cast_to_code(value)) {}
 
   T value() const noexcept { return default_traits_t::cast_from_code(code_.value()); }
@@ -104,31 +114,58 @@ class result {
 
   friend bool operator==(result const &lhs, result const &rhs) noexcept { return lhs.code_ == rhs.code_; }
   friend bool operator!=(result const &lhs, result const &rhs) noexcept { return lhs.code_ != rhs.code_; }
+};
+
+template <typename T, typename DefTraits>
+class result<T, DefTraits, std::enable_if_t<std::is_pointer<T>::value>> {
+
+  result_code code_;
+
+public:
+  using default_traits_t = DefTraits;
+
+  result(T value = default_traits_t::value()) noexcept
+    : code_(default_traits_t::value() != value, 
+            default_traits_t::cast_to_code(value)) {}
+
+  result(std::nullptr_t, std::uint64_t code) noexcept
+    : code_(false, code) {}
 
-  friend std::ostream &operator<<(std::ostream &o, result const &r) noexcept { return o << r.code_; }
+  T value() const noexcept { return code_.ok() ? default_traits_t::cast_from_code(code_.value()) : nullptr; }
+  bool ok() const noexcept { return code_.ok(); }
+  std::uint64_t code() const noexcept { return code_.value(); }
+
+  T operator*() const noexcept {
+    return value();
+  }
+  explicit operator bool() const noexcept {
+    return ok();
+  }
+
+  friend bool operator==(result const &lhs, result const &rhs) noexcept { return lhs.code_ == rhs.code_; }
+  friend bool operator!=(result const &lhs, result const &rhs) noexcept { return lhs.code_ != rhs.code_; }
 };
 
 LIBIMP_NAMESPACE_END_
 
-template <typename T>
-struct fmt::formatter<::LIBIMP_NAMESPACE::result<T>> {
+template <typename T, typename D>
+struct fmt::formatter<::LIBIMP_::result<T, D>> {
   constexpr auto parse(format_parse_context& ctx) {
     return ctx.end();
   }
 
   template <typename FormatContext>
-  auto format(::LIBIMP_NAMESPACE::result<T> r, FormatContext &ctx) {
-    return format_to(ctx.out(), "[{}, value = {}]", 
-                    (r ? "succ" : "fail"), 
-                    ::LIBIMP_NAMESPACE::result<T>::default_traits_t::regularize(*r));
+  auto format(::LIBIMP_::result<T, D> r, FormatContext &ctx) {
+    return format_to(::LIBIMP_::result<T, D>::default_traits_t::format(r, 
+           format_to(ctx.out(), "[{}, value = ", r ? "succ" : "fail")), "]");
   }
 };
 
 template <>
-struct fmt::formatter<::LIBIMP_NAMESPACE::result_code>
-          : formatter<::LIBIMP_NAMESPACE::result<std::uint64_t>> {
+struct fmt::formatter<::LIBIMP_::result_code>
+          : formatter<::LIBIMP_::result<std::uint64_t>> {
   template <typename FormatContext>
-  auto format(::LIBIMP_NAMESPACE::result_code r, FormatContext &ctx) {
+  auto format(::LIBIMP_::result_code r, FormatContext &ctx) {
     return format_to(ctx.out(), "[{}, value = {}]", (r ? "succ" : "fail"), *r);
   }
 };
diff --git a/include/libipc/def.h b/include/libipc/def.h
index aa0c0c84..2ce94db9 100755
--- a/include/libipc/def.h
+++ b/include/libipc/def.h
@@ -9,14 +9,21 @@
 #include <cstddef>
 #include <cstdint>
 
-#if !defined(LIBIPC_NAMESPACE)
-# define LIBIPC_NAMESPACE ipc
-#endif
-#define LIBIPC_NAMESPACE_BEG_ namespace LIBIPC_NAMESPACE {
+#define LIBIPC_               ipc
+#define LIBIPC_NAMESPACE_     LIBIPC_
+#define LIBIPC_NAMESPACE_BEG_ namespace LIBIPC_NAMESPACE_ {
 #define LIBIPC_NAMESPACE_END_ }
 
 LIBIPC_NAMESPACE_BEG_
 
 // constants
 
+struct prot {
+  enum : std::uint32_t {
+    none  = 0x00,
+    read  = 0x01,
+    write = 0x02,
+  };
+};
+
 LIBIPC_NAMESPACE_END_
diff --git a/include/libipc/mmap.h b/include/libipc/mmap.h
index d2bc07f8..3b266a52 100644
--- a/include/libipc/mmap.h
+++ b/include/libipc/mmap.h
@@ -8,6 +8,7 @@
 
 #include "libimp/export.h"
 #include "libimp/result.h"
+
 #include "libipc/def.h"
 
 LIBIPC_NAMESPACE_BEG_
@@ -18,6 +19,6 @@ using mmap_t = mmap_handle *;
 /**
  * @brief Creates a new mapping in the virtual address space of the calling process.
  */
-LIBIMP_EXPORT mmap_t mmap_open();
+LIBIMP_EXPORT ::LIBIMP_::result<mmap_t> mmap_open();
 
 LIBIPC_NAMESPACE_END_
diff --git a/test/test_result.cpp b/test/test_result.cpp
index a20aaa6e..87f9cd4e 100644
--- a/test/test_result.cpp
+++ b/test/test_result.cpp
@@ -68,10 +68,14 @@ TEST(result, fmt) {
   {
     imp::result<int> r1 {false, -123};
     EXPECT_EQ(fmt::format("{}", r1), fmt::format("[fail, value = {}]", -123));
-    imp::result<void *> r2 {true, &r1};
+    imp::result<void *> r2 {&r1};
     EXPECT_EQ(fmt::format("{}", r2), fmt::format("[succ, value = {}]", (void *)&r1));
     int aaa {};
-    imp::result<int *> r3 {false, &aaa};
-    EXPECT_EQ(fmt::format("{}", r3), fmt::format("[fail, value = {}]", (void *)&aaa));
+    imp::result<int *> r3 {&aaa};
+    EXPECT_EQ(fmt::format("{}", r3), fmt::format("[succ, value = {}]", (void *)&aaa));
+    imp::result<int *> r4 {nullptr};
+    EXPECT_EQ(fmt::format("{}", r4), fmt::format("[fail, value = {}, code = 0]", nullptr));
+    r4 = {nullptr, 1234};
+    EXPECT_EQ(fmt::format("{}", r4), fmt::format("[fail, value = {}, code = 1234]", nullptr));
   }
 }
\ No newline at end of file

From 29188f939c1c4b6629d9abe1d85465ba972abb64 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 15 May 2022 19:35:58 +0800
Subject: [PATCH 028/272] add: [mmap] add interface declarations

---
 include/libipc/def.h                          |  3 ++-
 include/libipc/mmap.h                         | 21 ++++++++++++++++++-
 ...tect_plat.cpp => test_imp_detect_plat.cpp} |  0
 test/{test_result.cpp => test_imp_result.cpp} |  0
 ...{test_utility.cpp => test_imp_utility.cpp} |  0
 test/test_ipc_mmap.cpp                        |  7 +++++++
 6 files changed, 29 insertions(+), 2 deletions(-)
 rename test/{test_detect_plat.cpp => test_imp_detect_plat.cpp} (100%)
 rename test/{test_result.cpp => test_imp_result.cpp} (100%)
 rename test/{test_utility.cpp => test_imp_utility.cpp} (100%)
 create mode 100644 test/test_ipc_mmap.cpp

diff --git a/include/libipc/def.h b/include/libipc/def.h
index 2ce94db9..dd04e076 100755
--- a/include/libipc/def.h
+++ b/include/libipc/def.h
@@ -19,7 +19,8 @@ LIBIPC_NAMESPACE_BEG_
 // constants
 
 struct prot {
-  enum : std::uint32_t {
+  using type = std::uint32_t;
+  enum : type {
     none  = 0x00,
     read  = 0x01,
     write = 0x02,
diff --git a/include/libipc/mmap.h b/include/libipc/mmap.h
index 3b266a52..2f9e921c 100644
--- a/include/libipc/mmap.h
+++ b/include/libipc/mmap.h
@@ -6,6 +6,9 @@
  */
 #pragma once
 
+#include <string>
+#include <cstddef>
+
 #include "libimp/export.h"
 #include "libimp/result.h"
 
@@ -19,6 +22,22 @@ using mmap_t = mmap_handle *;
 /**
  * @brief Creates a new mapping in the virtual address space of the calling process.
  */
-LIBIMP_EXPORT ::LIBIMP_::result<mmap_t> mmap_open();
+LIBIMP_EXPORT ::LIBIMP_::result<mmap_t> mmap_open(std::string const &file, 
+                                                  std::size_t size = 0,
+                                                  prot::type = prot::read | prot::write) noexcept;
+
+/**
+ * @brief Close the memory mapping handle.
+ */
+LIBIMP_EXPORT ::LIBIMP_::result_code mmap_close(mmap_t) noexcept;
+
+/**
+ * @brief Synchronize a file with a memory map.
+ */
+LIBIMP_EXPORT ::LIBIMP_::result_code mmap_sync(mmap_t) noexcept;
+
+LIBIMP_EXPORT void *      mmap_get (mmap_t) noexcept;
+LIBIMP_EXPORT std::size_t mmap_size(mmap_t) noexcept;
+LIBIMP_EXPORT std::string mmap_file(mmap_t) noexcept;
 
 LIBIPC_NAMESPACE_END_
diff --git a/test/test_detect_plat.cpp b/test/test_imp_detect_plat.cpp
similarity index 100%
rename from test/test_detect_plat.cpp
rename to test/test_imp_detect_plat.cpp
diff --git a/test/test_result.cpp b/test/test_imp_result.cpp
similarity index 100%
rename from test/test_result.cpp
rename to test/test_imp_result.cpp
diff --git a/test/test_utility.cpp b/test/test_imp_utility.cpp
similarity index 100%
rename from test/test_utility.cpp
rename to test/test_imp_utility.cpp
diff --git a/test/test_ipc_mmap.cpp b/test/test_ipc_mmap.cpp
new file mode 100644
index 00000000..40ed6bb3
--- /dev/null
+++ b/test/test_ipc_mmap.cpp
@@ -0,0 +1,7 @@
+
+#include "gtest/gtest.h"
+
+#include "libipc/mmap.h"
+
+TEST(mmap, create_close) {
+}
\ No newline at end of file

From d129e6221a0363d84bd21e792cb484f2ebfa2928 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 15 May 2022 19:40:58 +0800
Subject: [PATCH 029/272] =?UTF-8?q?fix:=20=E2=80=98detail=5Fresult?=
 =?UTF-8?q?=E2=80=99=20does=20not=20name=20a=20type?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 include/libimp/result.h | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/include/libimp/result.h b/include/libimp/result.h
index 121e4b38..e72052b5 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -43,6 +43,13 @@ class LIBIMP_EXPORT result_code {
   friend bool operator!=(result_code const &lhs, result_code const &rhs) noexcept;
 };
 
+namespace detail_result {
+
+template <typename T, typename = void>
+struct default_traits;
+
+} // namespace detail_result
+
 template <typename T, 
           typename DefTraits = detail_result::default_traits<T>, 
           typename = void>
@@ -50,9 +57,6 @@ class result;
 
 namespace detail_result {
 
-template <typename T, typename = void>
-struct default_traits;
-
 template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
   constexpr static T value() noexcept { return 0; }

From c1557a72ac282b04596f9d82706123881ae49f5d Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 15 May 2022 19:58:53 +0800
Subject: [PATCH 030/272] fix: [vs2015] error C3250: 'u': declaration is not
 allowed in 'constexpr' function body

---
 include/libimp/horrible_cast.h | 16 +++++++++++-----
 include/libimp/result.h        |  2 +-
 src/libimp/CMakeLists.txt      |  5 +++++
 src/libipc/CMakeLists.txt      |  5 +++++
 4 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/include/libimp/horrible_cast.h b/include/libimp/horrible_cast.h
index 88520c6f..cce6ef7f 100644
--- a/include/libimp/horrible_cast.h
+++ b/include/libimp/horrible_cast.h
@@ -12,14 +12,20 @@
 
 LIBIMP_NAMESPACE_BEG_
 
+namespace detail_horrible_cast {
+
+template <typename T, typename U>
+union temp {
+  std::decay_t<U> in;
+  T out;
+};
+
+} // namespace detail_horrible_cast
+
 template <typename T, typename U>
 constexpr auto horrible_cast(U &&in) noexcept
   -> std::enable_if_t<(sizeof(T) == sizeof(std::decay_t<U>)), T> {
-  union {
-    std::decay_t<U> in;
-    T out;
-  } u {std::forward<U>(in)};
-  return u.out;
+  return detail_horrible_cast::temp<T, std::decay_t<U>>{std::forward<U>(in)}.out;
 }
 
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/result.h b/include/libimp/result.h
index e72052b5..81f94c87 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -154,7 +154,7 @@ LIBIMP_NAMESPACE_END_
 
 template <typename T, typename D>
 struct fmt::formatter<::LIBIMP_::result<T, D>> {
-  constexpr auto parse(format_parse_context& ctx) {
+  constexpr auto parse(format_parse_context& ctx) const {
     return ctx.end();
   }
 
diff --git a/src/libimp/CMakeLists.txt b/src/libimp/CMakeLists.txt
index 65e34053..4e5fc424 100644
--- a/src/libimp/CMakeLists.txt
+++ b/src/libimp/CMakeLists.txt
@@ -1,5 +1,10 @@
 project(imp)
 
+if(NOT MSVC)
+  add_compile_options(
+    -Wno-attributes)
+endif()
+
 aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libimp SRC_FILES)
 
 file(GLOB HEAD_FILES
diff --git a/src/libipc/CMakeLists.txt b/src/libipc/CMakeLists.txt
index 60007c13..7eed20ba 100644
--- a/src/libipc/CMakeLists.txt
+++ b/src/libipc/CMakeLists.txt
@@ -1,5 +1,10 @@
 project(ipc)
 
+if(NOT MSVC)
+  add_compile_options(
+    -Wno-attributes)
+endif()
+
 aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libipc SRC_FILES)
 
 file(GLOB HEAD_FILES

From 114cef7de97c6689186babfb6f63bbb442881efa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9C=A8=E5=A4=B4=E4=BA=91?= <orz@orzz.org>
Date: Sun, 15 May 2022 20:05:55 +0800
Subject: [PATCH 031/272] Update README.md

---
 README.md | 35 +----------------------------------
 1 file changed, 1 insertion(+), 34 deletions(-)

diff --git a/README.md b/README.md
index eeb7f2f4..65fe94e2 100755
--- a/README.md
+++ b/README.md
@@ -2,42 +2,9 @@
 
 [![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/mutouyun/cpp-ipc/blob/master/LICENSE) 
 [![Build Status](https://github.com/mutouyun/cpp-ipc/actions/workflows/c-cpp.yml/badge.svg)](https://github.com/mutouyun/cpp-ipc/actions)
-[![Build status](https://ci.appveyor.com/api/projects/status/github/mutouyun/cpp-ipc?branch=master&svg=true)](https://ci.appveyor.com/project/mutouyun/cpp-ipc)
 [![Vcpkg package](https://img.shields.io/badge/Vcpkg-package-blueviolet)](https://github.com/microsoft/vcpkg/tree/master/ports/cpp-ipc)
  
 A high-performance inter-process communication using shared memory on Linux/Windows.  
 使用共享内存的跨平台（Linux/Windows，x86/x64/ARM）高性能IPC通讯库。
  
- * 推荐支持C++17的编译器（msvc-2017/gcc-7/clang-4）
- * 除STL外，无其他依赖
- * 无锁（lock-free）或轻量级spin-lock
- * 底层数据结构为循环数组（circular array）
- * `ipc::route`支持单写多读，`ipc::channel`支持多写多读【**注意：目前同一条通道最多支持32个receiver，sender无限制**】
- * 默认采用广播模式收发数据，支持用户任意选择读写方案
- * 不会长时间忙等（重试一定次数后会使用信号量进行等待），支持超时
- * 支持[Vcpkg](https://github.com/microsoft/vcpkg/blob/master/README_zh_CN.md)方式安装，如`vcpkg install cpp-ipc`
- 
-## Usage
-
-See: [Wiki](https://github.com/mutouyun/cpp-ipc/wiki)
-
-## Performance
-
- Environment | Value
- ------ | ------
- Device | Lenovo ThinkPad T450
- CPU | Intel® Core™ i5-4300U @ 2.5 GHz
- RAM | 16 GB
- OS | Windows 7 Ultimate x64
- Compiler | MSVC 2017 15.9.4
-
-UT & benchmark test function: [test](test)  
-Performance data: [performance.xlsx](performance.xlsx)
-
-## Reference
-
- * [Lock-Free Data Structures | Dr Dobb's](http://www.drdobbs.com/lock-free-data-structures/184401865)
- * [Yet another implementation of a lock-free circular array queue | CodeProject](https://www.codeproject.com/Articles/153898/Yet-another-implementation-of-a-lock-free-circular)
- * [Lock-Free 编程 | 匠心十年 - 博客园](http://www.cnblogs.com/gaochundong/p/lock_free_programming.html)
- * [无锁队列的实现 | 酷 壳 - CoolShell](https://coolshell.cn/articles/8239.html)
- * [Implementing Condition Variables with Semaphores](https://www.microsoft.com/en-us/research/wp-content/uploads/2004/12/ImplementingCVs.pdf)
+ * 【**重构中……**】

From fcca475076c699d56e1ea39eb056a9517b887d62 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 22 May 2022 18:29:18 +0800
Subject: [PATCH 032/272] add: [log] implement simple log function (TBD)

---
 include/libimp/countof.h         |  22 ++---
 include/libimp/log.h             | 144 +++++++++++++++++++++++++++++++
 include/libimp/result.h          |   1 +
 src/libimp/log.cpp               |  33 +++++++
 src/libipc/mmap.cpp              |   7 ++
 src/libipc/platform/posix/mmap.h |  27 ++++++
 test/test_imp_log.cpp            |  90 +++++++++++++++++++
 test/test_imp_utility.cpp        |   4 +-
 8 files changed, 315 insertions(+), 13 deletions(-)
 create mode 100644 include/libimp/log.h
 create mode 100644 src/libimp/log.cpp
 create mode 100644 src/libipc/mmap.cpp
 create mode 100644 src/libipc/platform/posix/mmap.h
 create mode 100644 test/test_imp_log.cpp

diff --git a/include/libimp/countof.h b/include/libimp/countof.h
index 59c0d39f..91f0e089 100644
--- a/include/libimp/countof.h
+++ b/include/libimp/countof.h
@@ -18,10 +18,10 @@ LIBIMP_NAMESPACE_BEG_
  * @see https://en.cppreference.com/w/cpp/iterator/size
 */
 
-namespace detail {
+namespace detail_countof {
 
 template <typename T>
-struct countof_trait_has_size {
+struct trait_has_size {
 private:
   template <typename Type>
   static std::true_type check(decltype(std::declval<Type>().size())*);
@@ -33,7 +33,7 @@ struct countof_trait_has_size {
 };
 
 template <typename T>
-struct countof_trait_has_Size {
+struct trait_has_Size {
 private:
   template <typename Type>
   static std::true_type check(decltype(std::declval<Type>().Size())*);
@@ -44,34 +44,34 @@ struct countof_trait_has_Size {
   constexpr static auto value = type::value;
 };
 
-template <typename C, bool = countof_trait_has_size<C>::value
-                    , bool = countof_trait_has_Size<C>::value>
-struct countof_trait;
+template <typename C, bool = trait_has_size<C>::value
+                    , bool = trait_has_Size<C>::value>
+struct trait;
 
 template <typename T, std::size_t N>
-struct countof_trait<T[N], false, false> {
+struct trait<T[N], false, false> {
   constexpr static auto countof(T const (&)[N]) noexcept {
     return N;
   }
 };
 
 template <typename C, bool B>
-struct countof_trait<C, true, B> {
+struct trait<C, true, B> {
   constexpr static auto countof(C const &c) noexcept(noexcept(c.size())) {
     return c.size();
   }
 };
 
 template <typename C>
-struct countof_trait<C, false, true> {
+struct trait<C, false, true> {
   constexpr static auto countof(C const &c) noexcept(noexcept(c.Size())) {
     return c.Size();
   }
 };
 
-} // namespace detail
+} // namespace detail_countof
 
-template <typename C, typename R = detail::countof_trait<C>>
+template <typename C, typename R = detail_countof::trait<C>>
 constexpr auto countof(C const &c) noexcept(noexcept(R::countof(c))) {
   return R::countof(c);
 }
diff --git a/include/libimp/log.h b/include/libimp/log.h
new file mode 100644
index 00000000..0ced440d
--- /dev/null
+++ b/include/libimp/log.h
@@ -0,0 +1,144 @@
+/**
+ * @file libimp/log.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Simple log output component
+ * @date 2022-05-22
+ */
+#pragma once
+
+#include <string>
+#include <type_traits>
+
+#include "fmt/format.h"
+
+#include "libimp/def.h"
+#include "libimp/detect_plat.h"
+#include "libimp/export.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+namespace detail_log {
+
+template <typename T>
+class has_fn_info {
+  static std::false_type check(...);
+  template <typename U>
+  static auto check(U *u) -> decltype(u->info(std::declval<std::string>()), std::true_type{});
+
+public:
+  using type = decltype(check(static_cast<T *>(nullptr)));
+};
+
+template <typename T>
+constexpr bool has_fn_info_v = typename has_fn_info<T>::type::value;
+
+template <typename T>
+class has_fn_error {
+  static std::false_type check(...);
+  template <typename U>
+  static auto check(U *u) -> decltype(u->error(std::declval<std::string>()), std::true_type{});
+
+public:
+  using type = decltype(check(static_cast<T *>(nullptr)));
+};
+
+template <typename T>
+constexpr bool has_fn_error_v = typename has_fn_error<T>::type::value;
+
+struct vtable_t {
+  void (*info )(void *, std::string &&);
+  void (*error)(void *, std::string &&);
+};
+
+template <typename T>
+class traits {
+  template <typename U>
+  static auto make_fn_info() noexcept
+    -> std::enable_if_t<has_fn_info_v<U>, void (*)(void *, std::string &&)> {
+    return [](void *p, std::string &&s) {
+      static_cast<U *>(p)->info(std::move(s));
+    };
+  }
+  template <typename U>
+  static auto make_fn_info() noexcept
+    -> std::enable_if_t<!has_fn_info_v<U>, void (*)(void *, std::string &&)> {
+    return [](void *, std::string &&) {};
+  }
+
+  template <typename U>
+  static auto make_fn_error() noexcept
+    -> std::enable_if_t<has_fn_error_v<U>, void (*)(void *, std::string &&)> {
+    return [](void *p, std::string &&s) {
+      static_cast<U *>(p)->error(std::move(s));
+    };
+  }
+  template <typename U>
+  static auto make_fn_error() noexcept
+    -> std::enable_if_t<!has_fn_error_v<U>, void (*)(void *, std::string &&)> {
+    return [](void *, std::string &&) {};
+  }
+
+public:
+  static auto make_vtable() noexcept {
+    static vtable_t vt {
+      make_fn_info <T>(),
+      make_fn_error<T>(),
+    };
+    return &vt;
+  }
+};
+
+class prefix {
+  std::string px_;
+
+public:
+  template <typename... A>
+  prefix(A &&... args) {
+    LIBIMP_UNUSED auto unfold = {
+      0, ((px_ += ::fmt::format("[{}]", std::forward<A>(args))), 0)...
+    };
+  }
+
+  operator std::string() const noexcept {
+    return px_;
+  }
+};
+
+} // namespace detail_log
+
+class LIBIMP_EXPORT log_printer {
+  void *objp_ {nullptr};
+  detail_log::vtable_t *vtable_ {nullptr};
+
+public:
+  log_printer() noexcept = default;
+
+  template <typename T>
+  log_printer(T &p) noexcept
+    : objp_  (static_cast<void *>(&p))
+    , vtable_(detail_log::traits<T>::make_vtable()) {}
+
+  explicit operator bool() const noexcept;
+
+  void info (std::string &&);
+  void error(std::string &&);
+};
+
+class LIBIMP_EXPORT log_std_t {
+public:
+  void info (std::string &&) const;
+  void error(std::string &&) const;
+};
+
+LIBIMP_EXPORT extern log_std_t log_std;
+
+namespace log {
+
+template <typename Fmt, typename... A>
+std::string fmt(Fmt &&ft, A &&... args) {
+  return ::fmt::format(std::forward<Fmt>(ft), std::forward<A>(args)...);
+}
+
+} // namespace log
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/result.h b/include/libimp/result.h
index 81f94c87..0bff001f 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -8,6 +8,7 @@
 
 #include <type_traits>
 #include <cstdint>
+#include <span>
 
 #include "fmt/format.h"
 
diff --git a/src/libimp/log.cpp b/src/libimp/log.cpp
new file mode 100644
index 00000000..dc37e330
--- /dev/null
+++ b/src/libimp/log.cpp
@@ -0,0 +1,33 @@
+
+#include <utility>
+#include <iostream>
+
+#include "libimp/log.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+log_printer::operator bool() const noexcept {
+  return (objp_ != nullptr) && (vtable_ != nullptr);
+}
+
+void log_printer::info(std::string && s) {
+  if (!*this) return;
+  vtable_->info(objp_, std::move(s));
+}
+
+void log_printer::error(std::string && s) {
+  if (!*this) return;
+  vtable_->error(objp_, std::move(s));
+}
+
+log_std_t log_std;
+
+void log_std_t::info(std::string && s) const {
+  std::cout << std::move(s);
+}
+
+void log_std_t::error(std::string && s) const {
+  std::cerr << std::move(s);
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/src/libipc/mmap.cpp b/src/libipc/mmap.cpp
new file mode 100644
index 00000000..06fb539b
--- /dev/null
+++ b/src/libipc/mmap.cpp
@@ -0,0 +1,7 @@
+#include "libipc/mmap.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/posix/mmap.h b/src/libipc/platform/posix/mmap.h
new file mode 100644
index 00000000..8aef07bf
--- /dev/null
+++ b/src/libipc/platform/posix/mmap.h
@@ -0,0 +1,27 @@
+/**
+ * @file libimp/platform/posix/mmap.h
+ * @author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <string>
+#include <cstddef>
+
+#include "libipc/mmap.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+struct mmap_handle {
+  std::string file;
+  std::size_t f_sz;
+  std::size_t f_of;
+  void *memp;
+};
+
+inline int mmap_open_(mmap_t *h_out, std::string const &file, int fd, int flags, std::size_t f_sz, std::size_t f_of) noexcept {
+  if (h_out == nullptr) {
+    return -1;
+  }
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/test/test_imp_log.cpp b/test/test_imp_log.cpp
new file mode 100644
index 00000000..cc171f1e
--- /dev/null
+++ b/test/test_imp_log.cpp
@@ -0,0 +1,90 @@
+
+#include "gtest/gtest.h"
+
+#include "libimp/log.h"
+
+TEST(log, detail) {
+  EXPECT_FALSE(imp::detail_log::has_fn_info_v<int>);
+  EXPECT_FALSE(imp::detail_log::has_fn_error_v<int>);
+
+  struct foo {
+    int info(std::string);
+  };
+  EXPECT_TRUE (imp::detail_log::has_fn_info_v<foo>);
+  EXPECT_FALSE(imp::detail_log::has_fn_error_v<foo>);
+
+  struct bar {
+    int info(char const *);
+    void error(std::string &&);
+  };
+  EXPECT_FALSE(imp::detail_log::has_fn_info_v<bar>);
+  EXPECT_TRUE (imp::detail_log::has_fn_error_v<bar>);
+
+  struct str {
+    str(std::string const &);
+  };
+  struct foo_bar {
+    void info(std::string const &);
+    void error(str);
+  };
+  EXPECT_TRUE(imp::detail_log::has_fn_info_v<foo_bar>);
+  EXPECT_TRUE(imp::detail_log::has_fn_error_v<foo_bar>);
+
+  auto vt_int = imp::detail_log::traits<int>::make_vtable();
+  EXPECT_NE(vt_int, nullptr);
+  vt_int->info (nullptr, "123");
+  vt_int->error(nullptr, "321");
+
+  struct log {
+    std::string what;
+    void error(std::string &&s) {
+      what += s;
+    }
+  } ll;
+  auto vt_log = imp::detail_log::traits<log>::make_vtable();
+  EXPECT_NE(vt_log, nullptr);
+  vt_log->info (&ll, "123");
+  vt_log->error(&ll, "321");
+  vt_log->info (&ll, "654");
+  vt_log->error(&ll, "456");
+  EXPECT_EQ(ll.what, "321456");
+}
+
+TEST(log, log_printer) {
+  struct log {
+    std::string i;
+    std::string e;
+    void info(std::string &&s) {
+      i += s;
+    }
+    void error(std::string &&s) {
+      e += s;
+    }
+  } ll;
+
+  imp::log_printer pt = ll;
+  pt.info("hello ");
+  pt.error("failed: ");
+  pt.info("log-pt");
+  pt.error("whatever");
+  EXPECT_EQ(ll.i, "hello log-pt");
+  EXPECT_EQ(ll.e, "failed: whatever");
+
+  imp::log_printer ps = imp::log_std;
+  ps.info("hello world\n");
+}
+
+#include <chrono>
+#include <fmt/chrono.h>
+
+TEST(log, prefix) {
+  imp::detail_log::prefix prefix;
+  EXPECT_EQ(std::string{prefix}, "");
+
+  prefix = {"hello", "world"};
+  EXPECT_EQ(std::string{prefix}, "[hello][world]");
+
+  using namespace std::literals::chrono_literals;
+  prefix = {"time", imp::log::fmt("{:%H:%M:%S}", 3h + 15min + 30s)};
+  EXPECT_EQ(std::string{prefix}, "[time][03:15:30]");
+}
\ No newline at end of file
diff --git a/test/test_imp_utility.cpp b/test/test_imp_utility.cpp
index c16def49..e7c2527d 100644
--- a/test/test_imp_utility.cpp
+++ b/test/test_imp_utility.cpp
@@ -94,8 +94,8 @@ TEST(utility, countof) {
   struct {
     constexpr int Size() const noexcept { return 3; }
   } sv;
-  EXPECT_FALSE(imp::detail::countof_trait_has_size<decltype(sv)>::value);
-  EXPECT_TRUE (imp::detail::countof_trait_has_Size<decltype(sv)>::value);
+  EXPECT_FALSE(imp::detail_countof::trait_has_size<decltype(sv)>::value);
+  EXPECT_TRUE (imp::detail_countof::trait_has_Size<decltype(sv)>::value);
 
   std::vector<int> vec {1, 2, 3, 4, 5};
   int arr[] {7, 6, 5, 4, 3, 2, 1};

From 82072214d8cba46d58a9ff2a13b2ef5c7f617baf Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 22 May 2022 18:31:33 +0800
Subject: [PATCH 033/272] fix: fatal error span

---
 include/libimp/result.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/include/libimp/result.h b/include/libimp/result.h
index 0bff001f..81f94c87 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -8,7 +8,6 @@
 
 #include <type_traits>
 #include <cstdint>
-#include <span>
 
 #include "fmt/format.h"
 

From 0b504f7b4877e3b2f13dbbd64754d125f7738a8f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 22 May 2022 20:34:56 +0800
Subject: [PATCH 034/272] fix: expected ( before ; token

---
 include/libimp/log.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index 0ced440d..9c408216 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -30,7 +30,7 @@ class has_fn_info {
 };
 
 template <typename T>
-constexpr bool has_fn_info_v = typename has_fn_info<T>::type::value;
+constexpr bool has_fn_info_v = has_fn_info<T>::type::value;
 
 template <typename T>
 class has_fn_error {
@@ -43,7 +43,7 @@ class has_fn_error {
 };
 
 template <typename T>
-constexpr bool has_fn_error_v = typename has_fn_error<T>::type::value;
+constexpr bool has_fn_error_v = has_fn_error<T>::type::value;
 
 struct vtable_t {
   void (*info )(void *, std::string &&);

From e1de7f96380023061647ece83a6d07cf01ad73fa Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 23 May 2022 00:19:07 +0800
Subject: [PATCH 035/272] add: [log] a simple implementation to be optimized

---
 CMakeLists.txt              |  2 +-
 benchmark/benchmark_log.cpp | 17 ++++++++++++++
 include/libimp/log.h        | 46 +++++++++++++++++++++++--------------
 include/libimp/result.h     |  1 -
 src/libimp/log.cpp          |  6 ++---
 test/test_imp_log.cpp       | 16 +++----------
 6 files changed, 53 insertions(+), 35 deletions(-)
 create mode 100644 benchmark/benchmark_log.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index edfff1ef..c33a54bc 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -66,7 +66,7 @@ endif()
 if (LIBIPC_BUILD_BENCHMARK)
   set(BENCHMARK_ENABLE_TESTING OFF)
   add_subdirectory(3rdparty/benchmark)
-  # add_subdirectory(benchmark)
+  add_subdirectory(benchmark)
 endif()
 
 install(
diff --git a/benchmark/benchmark_log.cpp b/benchmark/benchmark_log.cpp
new file mode 100644
index 00000000..696839ba
--- /dev/null
+++ b/benchmark/benchmark_log.cpp
@@ -0,0 +1,17 @@
+
+#include "benchmark/benchmark.h"
+
+#include "libimp/log.h"
+
+namespace {
+
+void BM_imp_log_gripper(benchmark::State& state) {
+  imp::log::gripper log {{}, __func__};
+  for (auto _ : state) {
+    log.info("hello log.");
+  }
+}
+
+} // namespace
+
+BENCHMARK(BM_imp_log_gripper);
\ No newline at end of file
diff --git a/include/libimp/log.h b/include/libimp/log.h
index 9c408216..1e2a9a16 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -8,8 +8,10 @@
 
 #include <string>
 #include <type_traits>
+#include <chrono>
 
 #include "fmt/format.h"
+#include "fmt/chrono.h"
 
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
@@ -88,22 +90,6 @@ class traits {
   }
 };
 
-class prefix {
-  std::string px_;
-
-public:
-  template <typename... A>
-  prefix(A &&... args) {
-    LIBIMP_UNUSED auto unfold = {
-      0, ((px_ += ::fmt::format("[{}]", std::forward<A>(args))), 0)...
-    };
-  }
-
-  operator std::string() const noexcept {
-    return px_;
-  }
-};
-
 } // namespace detail_log
 
 class LIBIMP_EXPORT log_printer {
@@ -139,6 +125,32 @@ std::string fmt(Fmt &&ft, A &&... args) {
   return ::fmt::format(std::forward<Fmt>(ft), std::forward<A>(args)...);
 }
 
-} // namespace log
+class LIBIMP_EXPORT gripper {
+  log_printer printer_;
+  char const *func_;
 
+  gripper &output(void (log_printer::*out_fn)(std::string &&), char type, std::string &&log_str) {
+    auto tm = std::chrono::system_clock::now();
+    auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(tm).time_since_epoch().count() % 1000;
+    auto px = fmt("[{}][{:%Y-%m-%d %H:%M:%S}.{:03}][{}]\n", type, tm, ms, func_);
+    (printer_.*out_fn)(std::move(px += std::move(log_str)));
+    return *this;
+  }
+
+public:
+  gripper(log_printer printer, char const *func) noexcept 
+    : printer_(printer)
+    , func_   (func) {}
+
+  template <typename Fmt, typename... A>
+  gripper &info(Fmt &&ft, A &&... args) {
+    return output(&log_printer::info, 'I', fmt(std::forward<Fmt>(ft), std::forward<A>(args)...));
+  }
+  template <typename Fmt, typename... A>
+  gripper &error(Fmt &&ft, A &&... args) {
+    return output(&log_printer::error, 'E', fmt(std::forward<Fmt>(ft), std::forward<A>(args)...));
+  }
+};
+
+} // namespace log
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/result.h b/include/libimp/result.h
index 81f94c87..f27f0b3f 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -157,7 +157,6 @@ struct fmt::formatter<::LIBIMP_::result<T, D>> {
   constexpr auto parse(format_parse_context& ctx) const {
     return ctx.end();
   }
-
   template <typename FormatContext>
   auto format(::LIBIMP_::result<T, D> r, FormatContext &ctx) {
     return format_to(::LIBIMP_::result<T, D>::default_traits_t::format(r, 
diff --git a/src/libimp/log.cpp b/src/libimp/log.cpp
index dc37e330..c2ad1a8e 100644
--- a/src/libimp/log.cpp
+++ b/src/libimp/log.cpp
@@ -1,6 +1,6 @@
 
 #include <utility>
-#include <iostream>
+#include <cstdio>
 
 #include "libimp/log.h"
 
@@ -23,11 +23,11 @@ void log_printer::error(std::string && s) {
 log_std_t log_std;
 
 void log_std_t::info(std::string && s) const {
-  std::cout << std::move(s);
+  std::fprintf(stdin, "%s", s.c_str());
 }
 
 void log_std_t::error(std::string && s) const {
-  std::cerr << std::move(s);
+  std::fprintf(stderr, "%s", s.c_str());
 }
 
 LIBIMP_NAMESPACE_END_
diff --git a/test/test_imp_log.cpp b/test/test_imp_log.cpp
index cc171f1e..db55eaa1 100644
--- a/test/test_imp_log.cpp
+++ b/test/test_imp_log.cpp
@@ -74,17 +74,7 @@ TEST(log, log_printer) {
   ps.info("hello world\n");
 }
 
-#include <chrono>
-#include <fmt/chrono.h>
-
-TEST(log, prefix) {
-  imp::detail_log::prefix prefix;
-  EXPECT_EQ(std::string{prefix}, "");
-
-  prefix = {"hello", "world"};
-  EXPECT_EQ(std::string{prefix}, "[hello][world]");
-
-  using namespace std::literals::chrono_literals;
-  prefix = {"time", imp::log::fmt("{:%H:%M:%S}", 3h + 15min + 30s)};
-  EXPECT_EQ(std::string{prefix}, "[time][03:15:30]");
+TEST(log, gripper) {
+  imp::log::gripper log {imp::log_std, __func__};
+  log.info("hello");
 }
\ No newline at end of file

From df3890d0c5169c090eaaad909fb9c6369580afb7 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 29 May 2022 17:58:37 +0800
Subject: [PATCH 036/272] fix: [log] adjust code interface and fix bugs

---
 benchmark/benchmark_log.cpp |   8 +++
 include/libimp/log.h        | 140 +++++++++++++++++++-----------------
 src/libimp/log.cpp          |  38 +++++-----
 test/test_imp_log.cpp       |  57 +++++++--------
 4 files changed, 129 insertions(+), 114 deletions(-)

diff --git a/benchmark/benchmark_log.cpp b/benchmark/benchmark_log.cpp
index 696839ba..7a652124 100644
--- a/benchmark/benchmark_log.cpp
+++ b/benchmark/benchmark_log.cpp
@@ -5,6 +5,13 @@
 
 namespace {
 
+void BM_imp_log_no_output(benchmark::State& state) {
+  imp::log::gripper log {{}, __func__};
+  for (auto _ : state) {
+    log.debug("hello log.");
+  }
+}
+
 void BM_imp_log_gripper(benchmark::State& state) {
   imp::log::gripper log {{}, __func__};
   for (auto _ : state) {
@@ -14,4 +21,5 @@ void BM_imp_log_gripper(benchmark::State& state) {
 
 } // namespace
 
+BENCHMARK(BM_imp_log_no_output);
 BENCHMARK(BM_imp_log_gripper);
\ No newline at end of file
diff --git a/include/libimp/log.h b/include/libimp/log.h
index 1e2a9a16..d682c244 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -16,75 +16,65 @@
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
 #include "libimp/export.h"
+#include "libimp/enum_cast.h"
 
 LIBIMP_NAMESPACE_BEG_
+namespace log {
 
-namespace detail_log {
-
-template <typename T>
-class has_fn_info {
-  static std::false_type check(...);
-  template <typename U>
-  static auto check(U *u) -> decltype(u->info(std::declval<std::string>()), std::true_type{});
+template <typename Fmt, typename... A>
+std::string fmt(Fmt &&ft, A &&... args) {
+  return ::fmt::format(std::forward<Fmt>(ft), std::forward<A>(args)...);
+}
 
-public:
-  using type = decltype(check(static_cast<T *>(nullptr)));
+enum class level : std::int32_t {
+  trace,
+  debug,
+  info,
+  warning,
+  error,
+  failed,
 };
 
-template <typename T>
-constexpr bool has_fn_info_v = has_fn_info<T>::type::value;
+} // namespace log
+
+namespace detail_log {
 
 template <typename T>
-class has_fn_error {
+class has_fn_output {
   static std::false_type check(...);
   template <typename U>
-  static auto check(U *u) -> decltype(u->error(std::declval<std::string>()), std::true_type{});
+  static auto check(U *u) -> decltype(u->output(log::level::trace, std::declval<std::string>()), std::true_type{});
 
 public:
   using type = decltype(check(static_cast<T *>(nullptr)));
 };
 
 template <typename T>
-constexpr bool has_fn_error_v = has_fn_error<T>::type::value;
+constexpr bool has_fn_output_v = has_fn_output<T>::type::value;
 
 struct vtable_t {
-  void (*info )(void *, std::string &&);
-  void (*error)(void *, std::string &&);
+  void (*output)(void *, log::level, std::string &&);
 };
 
 template <typename T>
 class traits {
   template <typename U>
-  static auto make_fn_info() noexcept
-    -> std::enable_if_t<has_fn_info_v<U>, void (*)(void *, std::string &&)> {
-    return [](void *p, std::string &&s) {
-      static_cast<U *>(p)->info(std::move(s));
+  static auto make_fn_output() noexcept
+    -> std::enable_if_t<has_fn_output_v<U>, void (*)(void *, log::level, std::string &&)> {
+    return [](void *p, log::level l, std::string &&s) {
+      static_cast<U *>(p)->output(l, std::move(s));
     };
   }
   template <typename U>
-  static auto make_fn_info() noexcept
-    -> std::enable_if_t<!has_fn_info_v<U>, void (*)(void *, std::string &&)> {
-    return [](void *, std::string &&) {};
-  }
-
-  template <typename U>
-  static auto make_fn_error() noexcept
-    -> std::enable_if_t<has_fn_error_v<U>, void (*)(void *, std::string &&)> {
-    return [](void *p, std::string &&s) {
-      static_cast<U *>(p)->error(std::move(s));
-    };
-  }
-  template <typename U>
-  static auto make_fn_error() noexcept
-    -> std::enable_if_t<!has_fn_error_v<U>, void (*)(void *, std::string &&)> {
-    return [](void *, std::string &&) {};
+  static auto make_fn_output() noexcept
+    -> std::enable_if_t<!has_fn_output_v<U>, void (*)(void *, log::level, std::string &&)> {
+    return [](void *, log::level, std::string &&) {};
   }
 
 public:
   static auto make_vtable() noexcept {
     static vtable_t vt {
-      make_fn_info <T>(),
-      make_fn_error<T>(),
+      make_fn_output<T>(),
     };
     return &vt;
   }
@@ -92,63 +82,81 @@ class traits {
 
 } // namespace detail_log
 
-class LIBIMP_EXPORT log_printer {
+namespace log {
+
+class LIBIMP_EXPORT printer {
   void *objp_ {nullptr};
   detail_log::vtable_t *vtable_ {nullptr};
 
 public:
-  log_printer() noexcept = default;
+  printer() noexcept = default;
 
   template <typename T>
-  log_printer(T &p) noexcept
+  printer(T &p) noexcept
     : objp_  (static_cast<void *>(&p))
     , vtable_(detail_log::traits<T>::make_vtable()) {}
 
   explicit operator bool() const noexcept;
 
-  void info (std::string &&);
-  void error(std::string &&);
+  void output(log::level, std::string &&);
 };
 
-class LIBIMP_EXPORT log_std_t {
+class LIBIMP_EXPORT std_t {
 public:
-  void info (std::string &&) const;
-  void error(std::string &&) const;
+  void output(log::level, std::string &&);
 };
 
-LIBIMP_EXPORT extern log_std_t log_std;
-
-namespace log {
-
-template <typename Fmt, typename... A>
-std::string fmt(Fmt &&ft, A &&... args) {
-  return ::fmt::format(std::forward<Fmt>(ft), std::forward<A>(args)...);
-}
+LIBIMP_EXPORT extern std_t std_out;
 
-class LIBIMP_EXPORT gripper {
-  log_printer printer_;
+class gripper {
+  printer printer_;
   char const *func_;
+  level level_limit_;
 
-  gripper &output(void (log_printer::*out_fn)(std::string &&), char type, std::string &&log_str) {
-    auto tm = std::chrono::system_clock::now();
-    auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(tm).time_since_epoch().count() % 1000;
-    auto px = fmt("[{}][{:%Y-%m-%d %H:%M:%S}.{:03}][{}]\n", type, tm, ms, func_);
-    (printer_.*out_fn)(std::move(px += std::move(log_str)));
+  template <typename Fmt, typename... A>
+  gripper &output(log::level l, Fmt &&ft, A &&... args) {
+    if (!printer_ || (enum_cast(l) < enum_cast(level_limit_))) {
+      return *this;
+    }
+    constexpr static char types[] = {
+      'T', 'D', 'I', 'W', 'E', 'F'
+    };
+    auto tp = std::chrono::system_clock::now();
+    auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(tp).time_since_epoch().count() % 1000;
+    auto px = fmt("[{}][{:%Y-%m-%d %H:%M:%S}.{:03}][{}] ", types[enum_cast(l)], tp, ms, func_);
+    printer_.output(l, std::move(px += fmt(std::forward<Fmt>(ft), std::forward<A>(args)...)));
     return *this;
   }
 
 public:
-  gripper(log_printer printer, char const *func) noexcept 
-    : printer_(printer)
-    , func_   (func) {}
+  gripper(printer printer, char const *func, level level_limit = level::info) noexcept 
+    : printer_    (printer)
+    , func_       (func)
+    , level_limit_(level_limit) {}
 
+  template <typename Fmt, typename... A>
+  gripper &trace(Fmt &&ft, A &&... args) {
+    return output(log::level::trace, std::forward<Fmt>(ft), std::forward<A>(args)...);
+  }
+  template <typename Fmt, typename... A>
+  gripper &debug(Fmt &&ft, A &&... args) {
+    return output(log::level::debug, std::forward<Fmt>(ft), std::forward<A>(args)...);
+  }
   template <typename Fmt, typename... A>
   gripper &info(Fmt &&ft, A &&... args) {
-    return output(&log_printer::info, 'I', fmt(std::forward<Fmt>(ft), std::forward<A>(args)...));
+    return output(log::level::info, std::forward<Fmt>(ft), std::forward<A>(args)...);
+  }
+  template <typename Fmt, typename... A>
+  gripper &warning(Fmt &&ft, A &&... args) {
+    return output(log::level::warning, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
   template <typename Fmt, typename... A>
   gripper &error(Fmt &&ft, A &&... args) {
-    return output(&log_printer::error, 'E', fmt(std::forward<Fmt>(ft), std::forward<A>(args)...));
+    return output(log::level::error, std::forward<Fmt>(ft), std::forward<A>(args)...);
+  }
+  template <typename Fmt, typename... A>
+  gripper &failed(Fmt &&ft, A &&... args) {
+    return output(log::level::failed, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
 };
 
diff --git a/src/libimp/log.cpp b/src/libimp/log.cpp
index c2ad1a8e..17f5b2a9 100644
--- a/src/libimp/log.cpp
+++ b/src/libimp/log.cpp
@@ -5,29 +5,35 @@
 #include "libimp/log.h"
 
 LIBIMP_NAMESPACE_BEG_
+namespace log {
 
-log_printer::operator bool() const noexcept {
+printer::operator bool() const noexcept {
   return (objp_ != nullptr) && (vtable_ != nullptr);
 }
 
-void log_printer::info(std::string && s) {
+void printer::output(log::level l, std::string &&s) {
   if (!*this) return;
-  vtable_->info(objp_, std::move(s));
+  vtable_->output(objp_, l, std::move(s));
 }
 
-void log_printer::error(std::string && s) {
-  if (!*this) return;
-  vtable_->error(objp_, std::move(s));
-}
-
-log_std_t log_std;
-
-void log_std_t::info(std::string && s) const {
-  std::fprintf(stdin, "%s", s.c_str());
-}
-
-void log_std_t::error(std::string && s) const {
-  std::fprintf(stderr, "%s", s.c_str());
+std_t std_out;
+
+void std_t::output(log::level l, std::string &&s) {
+  switch (l) {
+  case level::trace:
+  case level::debug:
+  case level::info:
+    std::fprintf(stdout, "%s\n", s.c_str());
+    break;
+  case level::warning:
+  case level::error:
+  case level::failed:
+    std::fprintf(stderr, "%s\n", s.c_str());
+    break;
+  default:
+    break;
+  }
 }
 
+} // namespace log
 LIBIMP_NAMESPACE_END_
diff --git a/test/test_imp_log.cpp b/test/test_imp_log.cpp
index db55eaa1..f5eaaca4 100644
--- a/test/test_imp_log.cpp
+++ b/test/test_imp_log.cpp
@@ -4,49 +4,43 @@
 #include "libimp/log.h"
 
 TEST(log, detail) {
-  EXPECT_FALSE(imp::detail_log::has_fn_info_v<int>);
-  EXPECT_FALSE(imp::detail_log::has_fn_error_v<int>);
+  EXPECT_FALSE(imp::detail_log::has_fn_output_v<int>);
 
   struct foo {
     int info(std::string);
   };
-  EXPECT_TRUE (imp::detail_log::has_fn_info_v<foo>);
-  EXPECT_FALSE(imp::detail_log::has_fn_error_v<foo>);
+  EXPECT_FALSE(imp::detail_log::has_fn_output_v<foo>);
 
   struct bar {
     int info(char const *);
-    void error(std::string &&);
+    void output(imp::log::level, std::string &&);
   };
-  EXPECT_FALSE(imp::detail_log::has_fn_info_v<bar>);
-  EXPECT_TRUE (imp::detail_log::has_fn_error_v<bar>);
+  EXPECT_TRUE(imp::detail_log::has_fn_output_v<bar>);
 
   struct str {
     str(std::string const &);
   };
   struct foo_bar {
-    void info(std::string const &);
-    void error(str);
+    void output(imp::log::level, str);
   };
-  EXPECT_TRUE(imp::detail_log::has_fn_info_v<foo_bar>);
-  EXPECT_TRUE(imp::detail_log::has_fn_error_v<foo_bar>);
+  EXPECT_TRUE(imp::detail_log::has_fn_output_v<foo_bar>);
 
   auto vt_int = imp::detail_log::traits<int>::make_vtable();
   EXPECT_NE(vt_int, nullptr);
-  vt_int->info (nullptr, "123");
-  vt_int->error(nullptr, "321");
+  vt_int->output(nullptr, imp::log::level::debug, "123");
 
   struct log {
     std::string what;
-    void error(std::string &&s) {
-      what += s;
+    void output(imp::log::level l, std::string &&s) {
+      if (l == imp::log::level::error) what += s;
     }
   } ll;
   auto vt_log = imp::detail_log::traits<log>::make_vtable();
   EXPECT_NE(vt_log, nullptr);
-  vt_log->info (&ll, "123");
-  vt_log->error(&ll, "321");
-  vt_log->info (&ll, "654");
-  vt_log->error(&ll, "456");
+  vt_log->output(&ll, imp::log::level::info , "123");
+  vt_log->output(&ll, imp::log::level::error, "321");
+  vt_log->output(&ll, imp::log::level::info , "654");
+  vt_log->output(&ll, imp::log::level::error, "456");
   EXPECT_EQ(ll.what, "321456");
 }
 
@@ -54,27 +48,26 @@ TEST(log, log_printer) {
   struct log {
     std::string i;
     std::string e;
-    void info(std::string &&s) {
-      i += s;
-    }
-    void error(std::string &&s) {
-      e += s;
+
+    void output(imp::log::level l, std::string &&s) {
+      if (l == imp::log::level::error) e += s;
+      else if (l == imp::log::level::info) i += s;
     }
   } ll;
 
-  imp::log_printer pt = ll;
-  pt.info("hello ");
-  pt.error("failed: ");
-  pt.info("log-pt");
-  pt.error("whatever");
+  imp::log::printer pt = ll;
+  pt.output(imp::log::level::info , "hello ");
+  pt.output(imp::log::level::error, "failed: ");
+  pt.output(imp::log::level::info , "log-pt");
+  pt.output(imp::log::level::error, "whatever");
   EXPECT_EQ(ll.i, "hello log-pt");
   EXPECT_EQ(ll.e, "failed: whatever");
 
-  imp::log_printer ps = imp::log_std;
-  ps.info("hello world\n");
+  imp::log::printer ps = imp::log::std_out;
+  ps.output(imp::log::level::info, "hello world\n");
 }
 
 TEST(log, gripper) {
-  imp::log::gripper log {imp::log_std, __func__};
+  imp::log::gripper log {imp::log::std_out, __func__};
   log.info("hello");
 }
\ No newline at end of file

From 6617033a63dbbec9956b027152b08fba3ce18bc5 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 7 Aug 2022 15:20:26 +0800
Subject: [PATCH 037/272] add: [detect-plat] add the Apple platform detection
 macro

---
 include/libimp/detect_plat.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
index 13d51047..687e0d96 100644
--- a/include/libimp/detect_plat.h
+++ b/include/libimp/detect_plat.h
@@ -16,12 +16,14 @@
 #elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || \
       defined(__NT__) || defined(__MSYS__)
 # define LIBIMP_OS_WIN32
-#elif defined(__linux__) || defined(__linux)
-# define LIBIMP_OS_LINUX
 #elif defined(__QNX__) || defined(__QNXNTO__)
 # define LIBIMP_OS_QNX
+#elif defined(__APPLE__)
+# define LIBIMP_OS_APPLE
 #elif defined(ANDROID) || defined(__ANDROID__)
 # define LIBIMP_OS_ANDROID
+#elif defined(__linux__) || defined(__linux)
+# define LIBIMP_OS_LINUX
 #else
 # error "This OS is unsupported."
 #endif

From 3522061321f5ec1b0c6364b55db7725cf6f9ff2a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 7 Aug 2022 17:49:52 +0800
Subject: [PATCH 038/272] upd: [def] adjusting predefined macros

---
 include/libimp/def.h         | 4 ++--
 include/libimp/detect_plat.h | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/libimp/def.h b/include/libimp/def.h
index a0ff342d..25535bc7 100644
--- a/include/libimp/def.h
+++ b/include/libimp/def.h
@@ -10,8 +10,8 @@
 #include <cstdint>
 
 #define LIBIMP_               imp
-#define LIBIMP_NAMESPACE_     LIBIMP_
-#define LIBIMP_NAMESPACE_BEG_ namespace LIBIMP_NAMESPACE_ {
+#define LIBIMP_NAMESPACE_     :: LIBIMP_
+#define LIBIMP_NAMESPACE_BEG_ namespace LIBIMP_ {
 #define LIBIMP_NAMESPACE_END_ }
 
 LIBIMP_NAMESPACE_BEG_
diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
index 687e0d96..df3ac373 100644
--- a/include/libimp/detect_plat.h
+++ b/include/libimp/detect_plat.h
@@ -24,6 +24,8 @@
 # define LIBIMP_OS_ANDROID
 #elif defined(__linux__) || defined(__linux)
 # define LIBIMP_OS_LINUX
+#elif defined(_POSIX_VERSION)
+# define LIBIMP_OS_POSIX
 #else
 # error "This OS is unsupported."
 #endif

From 56ee0e12df21fc609e9d9f86f37ddb79692ad4ea Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 7 Aug 2022 17:51:30 +0800
Subject: [PATCH 039/272] add: [log] exception handling for log printing

---
 benchmark/benchmark_log.cpp |  4 ++--
 include/libimp/log.h        | 46 ++++++++++++++++++++++---------------
 src/libimp/log.cpp          |  4 ++--
 test/test_imp_log.cpp       | 10 ++++++--
 4 files changed, 39 insertions(+), 25 deletions(-)

diff --git a/benchmark/benchmark_log.cpp b/benchmark/benchmark_log.cpp
index 7a652124..549bbb83 100644
--- a/benchmark/benchmark_log.cpp
+++ b/benchmark/benchmark_log.cpp
@@ -6,14 +6,14 @@
 namespace {
 
 void BM_imp_log_no_output(benchmark::State& state) {
-  imp::log::gripper log {{}, __func__};
+  imp::log::gripper log {__func__, {}};
   for (auto _ : state) {
     log.debug("hello log.");
   }
 }
 
 void BM_imp_log_gripper(benchmark::State& state) {
-  imp::log::gripper log {{}, __func__};
+  imp::log::gripper log {__func__, {}};
   for (auto _ : state) {
     log.info("hello log.");
   }
diff --git a/include/libimp/log.h b/include/libimp/log.h
index d682c244..155fe835 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -9,6 +9,7 @@
 #include <string>
 #include <type_traits>
 #include <chrono>
+#include <exception>
 
 #include "fmt/format.h"
 #include "fmt/chrono.h"
@@ -53,22 +54,22 @@ template <typename T>
 constexpr bool has_fn_output_v = has_fn_output<T>::type::value;
 
 struct vtable_t {
-  void (*output)(void *, log::level, std::string &&);
+  void (*output)(void *, log::level, std::string &&) noexcept;
 };
 
 template <typename T>
 class traits {
   template <typename U>
   static auto make_fn_output() noexcept
-    -> std::enable_if_t<has_fn_output_v<U>, void (*)(void *, log::level, std::string &&)> {
-    return [](void *p, log::level l, std::string &&s) {
+    -> std::enable_if_t<has_fn_output_v<U>, void (*)(void *, log::level, std::string &&) noexcept> {
+    return [](void *p, log::level l, std::string &&s) noexcept {
       static_cast<U *>(p)->output(l, std::move(s));
     };
   }
   template <typename U>
   static auto make_fn_output() noexcept
-    -> std::enable_if_t<!has_fn_output_v<U>, void (*)(void *, log::level, std::string &&)> {
-    return [](void *, log::level, std::string &&) {};
+    -> std::enable_if_t<!has_fn_output_v<U>, void (*)(void *, log::level, std::string &&) noexcept> {
+    return [](void *, log::level, std::string &&) noexcept {};
   }
 
 public:
@@ -98,12 +99,12 @@ class LIBIMP_EXPORT printer {
 
   explicit operator bool() const noexcept;
 
-  void output(log::level, std::string &&);
+  void output(log::level, std::string &&) noexcept;
 };
 
 class LIBIMP_EXPORT std_t {
 public:
-  void output(log::level, std::string &&);
+  void output(log::level, std::string &&) noexcept;
 };
 
 LIBIMP_EXPORT extern std_t std_out;
@@ -114,51 +115,58 @@ class gripper {
   level level_limit_;
 
   template <typename Fmt, typename... A>
-  gripper &output(log::level l, Fmt &&ft, A &&... args) {
+  gripper &output(log::level l, Fmt &&ft, A &&... args) noexcept {
     if (!printer_ || (enum_cast(l) < enum_cast(level_limit_))) {
       return *this;
     }
     constexpr static char types[] = {
       'T', 'D', 'I', 'W', 'E', 'F'
     };
-    auto tp = std::chrono::system_clock::now();
-    auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(tp).time_since_epoch().count() % 1000;
-    auto px = fmt("[{}][{:%Y-%m-%d %H:%M:%S}.{:03}][{}] ", types[enum_cast(l)], tp, ms, func_);
-    printer_.output(l, std::move(px += fmt(std::forward<Fmt>(ft), std::forward<A>(args)...)));
+    try {
+      auto tp = std::chrono::system_clock::now();
+      auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(tp).time_since_epoch().count() % 1000;
+      auto px = fmt("[{}][{:%Y-%m-%d %H:%M:%S}.{:03}][{}] ", types[enum_cast(l)], tp, ms, func_);
+      printer_.output(l, std::move(px += fmt(std::forward<Fmt>(ft), std::forward<A>(args)...)));
+    } catch (std::exception const &e) {
+      /// @brief [TBD] std::string constructor may throw an exception
+      printer_.output(level::failed, e.what());
+    }
     return *this;
   }
 
 public:
-  gripper(printer printer, char const *func, level level_limit = level::info) noexcept 
+  gripper(char const *func, printer printer = std_out, level level_limit = level::info) noexcept 
     : printer_    (printer)
     , func_       (func)
     , level_limit_(level_limit) {}
 
   template <typename Fmt, typename... A>
-  gripper &trace(Fmt &&ft, A &&... args) {
+  gripper &trace(Fmt &&ft, A &&... args) noexcept {
     return output(log::level::trace, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
   template <typename Fmt, typename... A>
-  gripper &debug(Fmt &&ft, A &&... args) {
+  gripper &debug(Fmt &&ft, A &&... args) noexcept {
     return output(log::level::debug, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
   template <typename Fmt, typename... A>
-  gripper &info(Fmt &&ft, A &&... args) {
+  gripper &info(Fmt &&ft, A &&... args) noexcept {
     return output(log::level::info, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
   template <typename Fmt, typename... A>
-  gripper &warning(Fmt &&ft, A &&... args) {
+  gripper &warning(Fmt &&ft, A &&... args) noexcept {
     return output(log::level::warning, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
   template <typename Fmt, typename... A>
-  gripper &error(Fmt &&ft, A &&... args) {
+  gripper &error(Fmt &&ft, A &&... args) noexcept {
     return output(log::level::error, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
   template <typename Fmt, typename... A>
-  gripper &failed(Fmt &&ft, A &&... args) {
+  gripper &failed(Fmt &&ft, A &&... args) noexcept {
     return output(log::level::failed, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
 };
 
 } // namespace log
 LIBIMP_NAMESPACE_END_
+
+#define LIBIMP_LOG_(...) LIBIMP_NAMESPACE_::log::gripper log {__func__, __VA_ARGS__}
\ No newline at end of file
diff --git a/src/libimp/log.cpp b/src/libimp/log.cpp
index 17f5b2a9..aa10dca5 100644
--- a/src/libimp/log.cpp
+++ b/src/libimp/log.cpp
@@ -11,14 +11,14 @@ printer::operator bool() const noexcept {
   return (objp_ != nullptr) && (vtable_ != nullptr);
 }
 
-void printer::output(log::level l, std::string &&s) {
+void printer::output(log::level l, std::string &&s) noexcept {
   if (!*this) return;
   vtable_->output(objp_, l, std::move(s));
 }
 
 std_t std_out;
 
-void std_t::output(log::level l, std::string &&s) {
+void std_t::output(log::level l, std::string &&s) noexcept {
   switch (l) {
   case level::trace:
   case level::debug:
diff --git a/test/test_imp_log.cpp b/test/test_imp_log.cpp
index f5eaaca4..69e7953b 100644
--- a/test/test_imp_log.cpp
+++ b/test/test_imp_log.cpp
@@ -68,6 +68,12 @@ TEST(log, log_printer) {
 }
 
 TEST(log, gripper) {
-  imp::log::gripper log {imp::log::std_out, __func__};
-  log.info("hello");
+  {
+    imp::log::gripper log {__func__};
+    log.info("hello");
+  }
+  {
+    LIBIMP_LOG_();
+    log.info("hello 2");
+  }
 }
\ No newline at end of file

From ce52a1176c580a619969805eba63cb9417e3b4b9 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 7 Aug 2022 22:29:11 +0800
Subject: [PATCH 040/272] add: [codecvt] character set encoding conversion
 interface

---
 include/libimp/codecvt.h            |  26 +++
 src/libimp/codecvt.cpp              |   6 +
 src/libimp/platform/posix/codecvt.h | 319 ++++++++++++++++++++++++++++
 src/libimp/platform/win/codecvt.h   |  51 +++++
 test/test_imp_codecvt.cpp           |  29 +++
 5 files changed, 431 insertions(+)
 create mode 100644 include/libimp/codecvt.h
 create mode 100644 src/libimp/codecvt.cpp
 create mode 100644 src/libimp/platform/posix/codecvt.h
 create mode 100644 src/libimp/platform/win/codecvt.h
 create mode 100644 test/test_imp_codecvt.cpp

diff --git a/include/libimp/codecvt.h b/include/libimp/codecvt.h
new file mode 100644
index 00000000..e8675295
--- /dev/null
+++ b/include/libimp/codecvt.h
@@ -0,0 +1,26 @@
+/**
+ * @file libimp/codecvt.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Character set conversion interface
+ * @date 2022-08-07
+ */
+#pragma once
+
+#include <string>
+#include <cstddef>
+
+#include "libimp/def.h"
+#include "libimp/export.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * @brief The transform between local-character-set(UTF-8/GBK/...) and UTF-16/32
+ * 
+ * @param des  The target string pointer can be nullptr
+ * @param dlen The target string length can be 0
+ */
+template <typename CharT, typename CharU>
+LIBIMP_EXPORT std::size_t cvt_cstr(CharT const *src, std::size_t slen, CharU *des, std::size_t dlen) noexcept;
+
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/codecvt.cpp b/src/libimp/codecvt.cpp
new file mode 100644
index 00000000..b10c5b57
--- /dev/null
+++ b/src/libimp/codecvt.cpp
@@ -0,0 +1,6 @@
+#include "libimp/detect_plat.h"
+#if defined(LIBIMP_OS_WIN)
+#include "libimp/platform/win/codecvt.h"
+#else
+#include "libimp/platform/posix/codecvt.h"
+#endif
\ No newline at end of file
diff --git a/src/libimp/platform/posix/codecvt.h b/src/libimp/platform/posix/codecvt.h
new file mode 100644
index 00000000..0ba52c02
--- /dev/null
+++ b/src/libimp/platform/posix/codecvt.h
@@ -0,0 +1,319 @@
+/**
+ * @file libimp/platform/win/codecvt.h
+ * @author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <cstdint>
+#include <type_traits>
+
+#include "libimp/codecvt.h"
+#include "libimp/log.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * @brief The transform between local-character-set(UTF-8/GBK/...) and UTF-16/32
+ * 
+ * Modified from UnicodeConverter
+ * Copyright (c) 2010. Jianhui Qin (http://blog.csdn.net/jhqin)
+ */
+namespace {
+
+/// @brief X-bit unicode transformation format
+enum class ufmt {
+  utf8,
+  utf16,
+  utf32,
+};
+
+template <typename T, ufmt, typename = void>
+struct utf_compatible : std::false_type {};
+
+template <typename T>
+struct utf_compatible<T, ufmt::utf8, 
+  std::enable_if_t<std::is_fundamental<T>::value && (sizeof(T) == 1)>> : std::true_type {};
+
+template <typename T>
+struct utf_compatible<T, ufmt::utf16, 
+  std::enable_if_t<std::is_fundamental<T>::value && (sizeof(T) == 2)>> : std::true_type {};
+
+template <typename T>
+struct utf_compatible<T, ufmt::utf32, 
+  std::enable_if_t<std::is_fundamental<T>::value && (sizeof(T) == 4)>> : std::true_type {};
+
+template <typename T, ufmt Fmt>
+constexpr bool utf_compatible_v = utf_compatible<T, Fmt>::value;
+
+/**
+ * @brief UTF-32 --> UTF-8
+ */
+template <typename T, typename U>
+auto cvt_char(T src, U* des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf32> &&
+                      utf_compatible_v<U, ufmt::utf8>, std::size_t> {
+  if (src == 0) return 0;
+
+  constexpr std::uint8_t prefix[] = {
+    0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC
+  };
+  constexpr std::uint32_t codeup[] = {
+    0x80,      // U+00000000 - U+0000007F
+    0x800,     // U+00000080 - U+000007FF
+    0x10000,   // U+00000800 - U+0000FFFF
+    0x200000,  // U+00010000 - U+001FFFFF
+    0x4000000, // U+00200000 - U+03FFFFFF
+    0x80000000 // U+04000000 - U+7FFFFFFF
+  };
+
+  std::size_t i, len = sizeof(codeup) / sizeof(std::uint32_t);
+  for(i = 0; i < len; ++i) {
+    if (static_cast<std::uint32_t>(src) < codeup[i]) break;
+  }
+  if (i == len) return 0; // the src is invalid
+
+  len = i + 1;
+  if (des != nullptr) {
+    if (dlen > i) for (; i > 0; --i) {
+      des[i] = static_cast<U>((src & 0x3F) | 0x80);
+      src >>= 6;
+    }
+    des[0] = static_cast<U>(src | prefix[len - 1]);
+  }
+  return len;
+}
+
+/**
+ * @brief UTF-8 --> UTF-32
+ */
+template <typename T, typename U>
+auto cvt_char(T const *src, std::size_t slen, U &des) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf8> &&
+                      utf_compatible_v<U, ufmt::utf32>, std::size_t> {
+  if ((src == nullptr) || (*src) == 0) return 0;
+  if (slen == 0) return 0;
+
+  std::uint8_t b = (std::uint8_t)*(src++);
+
+  if (b < 0x80) {
+    des = b;
+    return 1;
+  }
+
+  if (b < 0xC0 || b > 0xFD) return 0; // the src is invalid
+
+  std::size_t len;
+  if (b < 0xE0) {
+    des = b & 0x1F;
+    len = 2;
+  } else if (b < 0xF0) {
+    des = b & 0x0F;
+    len = 3;
+  } else if (b < 0xF8) {
+    des = b & 0x07;
+    len = 4;
+  } else if (b < 0xFC) {
+    des = b & 0x03;
+    len = 5;
+  } else {
+    des = b & 0x01;
+    len = 6;
+  }
+
+  if (slen < len) return 0;
+  std::size_t i = 1;
+  for(; i < len; ++i) {
+    b = *(src++);
+    if ((b < 0x80) || (b > 0xBF)) return 0; // the src is invalid
+    des = (des << 6) + (b & 0x3F);
+  }
+  return len;
+}
+
+/**
+ * @brief UTF-32 --> UTF-16
+ */
+template <typename T, typename U>
+auto cvt_char(T src, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf32> &&
+                      utf_compatible_v<U, ufmt::utf16>, std::size_t> {
+  if (src == 0) return 0;
+
+  if (src <= 0xFFFF) {
+    if ((des != nullptr) && (dlen != 0)) {
+      (*des) = static_cast<U>(src);
+    }
+    return 1;
+  } else if (src <= 0xEFFFF) {
+    if ((des != nullptr) && (dlen > 1)) {
+      des[0] = static_cast<U>(0xD800 + (src >> 10) - 0x40);  // high
+      des[1] = static_cast<U>(0xDC00 + (src & 0x03FF));      // low
+    }
+    return 2;
+  }
+  return 0;
+}
+
+/**
+ * @brief UTF-16 --> UTF-32
+*/
+template <typename T, typename U>
+auto cvt_char(T const *src, std::size_t slen, U &des)
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf16> &&
+                      utf_compatible_v<U, ufmt::utf32>, std::size_t> {
+  if ((src == nullptr) || (*src) == 0) return 0;
+  if (slen == 0) return 0;
+
+  std::uint16_t w1 = src[0];
+  if ((w1 >= 0xD800) && (w1 <= 0xDFFF)) {
+    if (w1 < 0xDC00) {
+      if (slen < 2) return 0;
+      std::uint16_t w2 = src[1];
+      if ((w2 >= 0xDC00) && (w2 <= 0xDFFF)) {
+        des = (w2 & 0x03FF) + (((w1 & 0x03FF) + 0x40) << 10);
+        return 2;
+      }
+    }
+    return 0; // the src is invalid
+  }
+  des = w1;
+  return 1;
+}
+
+/**
+ * @brief UTF-16 --> UTF-8
+*/
+template <typename T, typename U>
+auto cvt_char(T src, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf16> &&
+                      utf_compatible_v<U, ufmt::utf8>, std::size_t> {
+  // make utf-16 to utf-32
+  std::uint32_t tmp;
+  if (cvt_char(&src, 1, tmp) != 1) return 0;
+  // make utf-32 to utf-8
+  return cvt_char(tmp, des, dlen);
+}
+
+/**
+ * @brief UTF-8 --> UTF-16
+*/
+template <typename T, typename U>
+auto cvt_char(T const *src, std::size_t slen, U &des)
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf8> &&
+                      utf_compatible_v<U, ufmt::utf16>, std::size_t> {
+  // make utf-8 to utf-32
+  std::uint32_t tmp;
+  std::size_t len = cvt_char(src, slen, tmp);
+  if (len == 0) return 0;
+  // make utf-32 to utf-16
+  if (cvt_char(tmp, &des, 1) != 1) return 0;
+  return len;
+}
+
+/**
+ * @brief UTF-32 string --> UTF-8/16 string
+*/
+template <typename T, typename U>
+auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf32> &&
+                     (utf_compatible_v<U, ufmt::utf16> || utf_compatible_v<U, ufmt::utf8>), std::size_t> {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  std::size_t num = 0, len = 0;
+  for (std::size_t i = 0; (i < slen) && ((*src) != 0); ++src, ++i) {
+    len = cvt_char(*src, des, dlen);
+    if (len == 0) return 0;
+    if (des != nullptr) {
+      des += len;
+      if (dlen < len) {
+        dlen = 0;
+      } else {
+        dlen -= len;
+      }
+    }
+    num += len;
+  }
+  return num;
+}
+
+/**
+ * @brief UTF-8/16 string --> UTF-32 string
+*/
+template <typename T, typename U>
+auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<U, ufmt::utf32> &&
+                     (utf_compatible_v<T, ufmt::utf16> || utf_compatible_v<T, ufmt::utf8>), std::size_t> {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  std::size_t num = 0;
+  for (std::size_t i = 0; (i < slen) && ((*src) != 0);) {
+    std::uint32_t tmp;
+    std::size_t len = cvt_char(src, slen - i, tmp);
+    if (len == 0) return 0;
+    if ((des != nullptr) && (dlen > 0)) {
+      (*des) = tmp;
+      ++des;
+      dlen -= 1;
+    }
+    src += len;
+    i   += len;
+    num += 1;
+  }
+  return num;
+}
+
+/**
+ * @brief UTF-8/16 string --> UTF-16/8 string
+*/
+template <typename T, typename U>
+auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<(utf_compatible_v<T, ufmt::utf8>  && utf_compatible_v<U, ufmt::utf16>) ||
+                      (utf_compatible_v<T, ufmt::utf16> && utf_compatible_v<U, ufmt::utf8>), std::size_t> {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  std::size_t num = 0;
+  for (std::size_t i = 0; (i < slen) && ((*src) != 0);) {
+    // make utf-x to utf-32
+    std::uint32_t tmp;
+    std::size_t len = cvt_char(src, slen - i, tmp);
+    if (len == 0) return 0;
+    src += len;
+    i   += len;
+    // make utf-32 to utf-y
+    len = cvt_char(tmp, des, dlen);
+    if (len == 0) return 0;
+    if (des != nullptr) {
+      des += len;
+      if (dlen < len) {
+        dlen = 0;
+      } else {
+        dlen -= len;
+      }
+    }
+    num += len;
+  }
+  return num;
+}
+
+} // namespace
+
+template <>
+std::size_t cvt_cstr(char const *src, std::size_t slen, wchar_t *des, std::size_t dlen) noexcept {
+  return cvt_cstr_utf(src, slen, des, dlen);
+}
+
+template <>
+std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char *des, std::size_t dlen) noexcept {
+  return cvt_cstr_utf(src, slen, des, dlen);
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/win/codecvt.h b/src/libimp/platform/win/codecvt.h
new file mode 100644
index 00000000..86a545c7
--- /dev/null
+++ b/src/libimp/platform/win/codecvt.h
@@ -0,0 +1,51 @@
+/**
+ * @file libimp/platform/win/codecvt.h
+ * @author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <Windows.h>
+
+#include "libimp/codecvt.h"
+#include "libimp/log.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * @brief The transform between local-character-set(UTF-8/GBK/...) and UTF-16/32
+ * 
+ * https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-multibytetowidechar
+ * https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-widechartomultibyte
+ * 
+ * CP_ACP       : The system default Windows ANSI code page.
+ * CP_MACCP     : The current system Macintosh code page.
+ * CP_OEMCP     : The current system OEM code page.
+ * CP_SYMBOL    : Symbol code page (42).
+ * CP_THREAD_ACP: The Windows ANSI code page for the current thread.
+ * CP_UTF7      : UTF-7. Use this value only when forced by a 7-bit transport mechanism. Use of UTF-8 is preferred.
+ * CP_UTF8      : UTF-8.
+ */
+
+template <>
+std::size_t cvt_cstr(char const *src, std::size_t slen, wchar_t *des, std::size_t dlen) noexcept {
+  LIBIMP_LOG_();
+  int r = ::MultiByteToWideChar(CP_UTF8, 0, src, (int)slen, des, (int)dlen);
+  if (r <= 0) {
+    log.error("MultiByteToWideChar fails. return = {}", ::GetLastError());
+    return 0;
+  }
+  return (std::size_t)r;
+}
+
+template <>
+std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char *des, std::size_t dlen) noexcept {
+  LIBIMP_LOG_();
+  int r = ::WideCharToMultiByte(CP_UTF8, 0, src, (int)slen, des, (int)dlen, nullptr, nullptr);
+  if (r <= 0) {
+    log.error("WideCharToMultiByte fails. return = {}", ::GetLastError());
+    return 0;
+  }
+  return (std::size_t)r;
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/test/test_imp_codecvt.cpp b/test/test_imp_codecvt.cpp
new file mode 100644
index 00000000..722d58c4
--- /dev/null
+++ b/test/test_imp_codecvt.cpp
@@ -0,0 +1,29 @@
+
+#include <string>
+#include <cstring>
+
+#include "gtest/gtest.h"
+
+#include "libimp/codecvt.h"
+
+TEST(codecvt, cvt_cstr) {
+  char const *utf8 = "hello world, "
+                     "\xe4\xbd\xa0\xe5\xa5\xbd\xef\xbc"
+                     "\x8c\xe3\x81\x93\xe3\x82\x93\xe3"
+                     "\x81\xab\xe3\x81\xa1\xe3\x81\xaf";
+  wchar_t const *utf16 = L"hello world, \u4f60\u597d\uff0c\u3053\u3093\u306b\u3061\u306f";
+  {
+    auto cvt_len = imp::cvt_cstr(utf8, std::strlen(utf8), (wchar_t *)nullptr, 0);
+    EXPECT_NE(cvt_len, 0);
+    std::wstring wstr(cvt_len, L'\0');
+    EXPECT_EQ(imp::cvt_cstr(utf8, std::strlen(utf8), &wstr[0], wstr.size()), cvt_len);
+    EXPECT_STREQ(wstr.c_str(), utf16);
+  }
+  {
+    auto cvt_len = imp::cvt_cstr(utf16, std::wcslen(utf16), (char *)nullptr, 0);
+    EXPECT_NE(cvt_len, 0);
+    std::string str(cvt_len, L'\0');
+    EXPECT_EQ(imp::cvt_cstr(utf16, std::wcslen(utf16), &str[0], str.size()), cvt_len);
+    EXPECT_STREQ(str.c_str(), utf8);
+  }
+}
\ No newline at end of file

From 9f333c8b0fef2897b591c54631af8a7d32e82c03 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 7 Aug 2022 22:45:14 +0800
Subject: [PATCH 041/272] fix: [log] error C2440: 'initializing': cannot
 convert from '...' to '... noexcept'

---
 include/libimp/log.h | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index 155fe835..34a81901 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -54,22 +54,22 @@ template <typename T>
 constexpr bool has_fn_output_v = has_fn_output<T>::type::value;
 
 struct vtable_t {
-  void (*output)(void *, log::level, std::string &&) noexcept;
+  void (*output)(void *, log::level, std::string &&);
 };
 
 template <typename T>
 class traits {
   template <typename U>
   static auto make_fn_output() noexcept
-    -> std::enable_if_t<has_fn_output_v<U>, void (*)(void *, log::level, std::string &&) noexcept> {
-    return [](void *p, log::level l, std::string &&s) noexcept {
+    -> std::enable_if_t<has_fn_output_v<U>, void (*)(void *, log::level, std::string &&)> {
+    return [](void *p, log::level l, std::string &&s) {
       static_cast<U *>(p)->output(l, std::move(s));
     };
   }
   template <typename U>
   static auto make_fn_output() noexcept
-    -> std::enable_if_t<!has_fn_output_v<U>, void (*)(void *, log::level, std::string &&) noexcept> {
-    return [](void *, log::level, std::string &&) noexcept {};
+    -> std::enable_if_t<!has_fn_output_v<U>, void (*)(void *, log::level, std::string &&)> {
+    return [](void *, log::level, std::string &&) {};
   }
 
 public:

From e9742ab28ae8b20999045fe19b77b3a2b16a4a58 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 13 Aug 2022 15:23:23 +0800
Subject: [PATCH 042/272] add: [codecvt] conversion for the same character type

---
 src/libimp/codecvt.cpp    | 33 ++++++++++++++++++++++++++++++++-
 test/test_imp_codecvt.cpp | 16 +++++++++++++++-
 2 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/src/libimp/codecvt.cpp b/src/libimp/codecvt.cpp
index b10c5b57..d9411be2 100644
--- a/src/libimp/codecvt.cpp
+++ b/src/libimp/codecvt.cpp
@@ -3,4 +3,35 @@
 #include "libimp/platform/win/codecvt.h"
 #else
 #include "libimp/platform/posix/codecvt.h"
-#endif
\ No newline at end of file
+#endif
+
+#include <algorithm>
+#include <cstring>
+
+LIBIMP_NAMESPACE_BEG_
+
+namespace {
+
+template <typename CharT>
+std::size_t cpy_cstr(CharT *des, std::size_t dlen, CharT const *src, std::size_t slen) noexcept {
+  if ((des == nullptr) || (dlen == 0)) {
+    return slen;
+  }
+  std::size_t r = (std::min)(slen, dlen);
+  std::memcpy(des, src, r * sizeof(CharT));
+  return r;
+}
+
+} // namespace
+
+template <>
+std::size_t cvt_cstr(char const *src, std::size_t slen, char *des, std::size_t dlen) noexcept {
+  return cpy_cstr(des, dlen, src, slen);
+}
+
+template <>
+std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, wchar_t *des, std::size_t dlen) noexcept {
+  return cpy_cstr(des, dlen, src, slen);
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/test/test_imp_codecvt.cpp b/test/test_imp_codecvt.cpp
index 722d58c4..34d5b120 100644
--- a/test/test_imp_codecvt.cpp
+++ b/test/test_imp_codecvt.cpp
@@ -22,8 +22,22 @@ TEST(codecvt, cvt_cstr) {
   {
     auto cvt_len = imp::cvt_cstr(utf16, std::wcslen(utf16), (char *)nullptr, 0);
     EXPECT_NE(cvt_len, 0);
-    std::string str(cvt_len, L'\0');
+    std::string str(cvt_len, '\0');
     EXPECT_EQ(imp::cvt_cstr(utf16, std::wcslen(utf16), &str[0], str.size()), cvt_len);
     EXPECT_STREQ(str.c_str(), utf8);
   }
+  {
+    auto cvt_len = imp::cvt_cstr(utf8, std::strlen(utf8), (char *)nullptr, 0);
+    EXPECT_EQ(cvt_len, std::strlen(utf8));
+    std::string str(cvt_len, '\0');
+    EXPECT_EQ(imp::cvt_cstr(utf8, cvt_len, &str[0], str.size()), cvt_len);
+    EXPECT_STREQ(str.c_str(), utf8);
+  }
+  {
+    auto cvt_len = imp::cvt_cstr(utf16, std::wcslen(utf16), (wchar_t *)nullptr, 0);
+    EXPECT_EQ(cvt_len, std::wcslen(utf16));
+    std::wstring wstr(cvt_len, L'\0');
+    EXPECT_EQ(imp::cvt_cstr(utf16, cvt_len, &wstr[0], wstr.size()), cvt_len);
+    EXPECT_STREQ(wstr.c_str(), utf16);
+  }
 }
\ No newline at end of file

From 8231d6f89e6165c7594b692478c9c2a3e18cfd1e Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 13 Aug 2022 17:52:00 +0800
Subject: [PATCH 043/272] add: [codecvt] support for char8_t, char16_t, and
 char32_t

---
 include/libimp/codecvt.h            |  14 +-
 src/libimp/codecvt.cpp              | 353 ++++++++++++++++++++++++++--
 src/libimp/platform/posix/codecvt.h | 319 -------------------------
 src/libimp/platform/win/codecvt.h   |  51 ----
 4 files changed, 349 insertions(+), 388 deletions(-)
 delete mode 100644 src/libimp/platform/posix/codecvt.h
 delete mode 100644 src/libimp/platform/win/codecvt.h

diff --git a/include/libimp/codecvt.h b/include/libimp/codecvt.h
index e8675295..395980ba 100644
--- a/include/libimp/codecvt.h
+++ b/include/libimp/codecvt.h
@@ -15,7 +15,7 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @brief The transform between local-character-set(UTF-8/GBK/...) and UTF-16/32
+ * @brief The transform between UTF-8/16/32
  * 
  * @param des  The target string pointer can be nullptr
  * @param dlen The target string length can be 0
@@ -23,4 +23,16 @@ LIBIMP_NAMESPACE_BEG_
 template <typename CharT, typename CharU>
 LIBIMP_EXPORT std::size_t cvt_cstr(CharT const *src, std::size_t slen, CharU *des, std::size_t dlen) noexcept;
 
+template <typename CharT, typename TraitsT, typename AllocT, 
+          typename CharU, typename TraitsU, typename AllocU>
+void cvt_sstr(std::basic_string<CharT, TraitsT, AllocT> const &src, std::basic_string<CharU, TraitsU, AllocU> &des) {
+  std::size_t dlen = cvt_cstr(src.c_str(), src.size(), (CharU *)nullptr, 0);
+  if (dlen == 0) {
+    des.clear();
+    return;
+  }
+  des.resize(dlen);
+  cvt_cstr(src.c_str(), src.size(), &des[0], des.size());
+}
+
 LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/codecvt.cpp b/src/libimp/codecvt.cpp
index d9411be2..57c6e0cb 100644
--- a/src/libimp/codecvt.cpp
+++ b/src/libimp/codecvt.cpp
@@ -1,37 +1,356 @@
-#include "libimp/detect_plat.h"
-#if defined(LIBIMP_OS_WIN)
-#include "libimp/platform/win/codecvt.h"
-#else
-#include "libimp/platform/posix/codecvt.h"
-#endif
 
 #include <algorithm>
+#include <type_traits>
 #include <cstring>
+#include <cstdint>
+
+#include "libimp/codecvt.h"
+#include "libimp/log.h"
+#include "libimp/detect_plat.h"
 
 LIBIMP_NAMESPACE_BEG_
 
+/**
+ * @brief The transform between local-character-set(UTF-8/GBK/...) and UTF-16/32
+ * 
+ * Modified from UnicodeConverter
+ * Copyright (c) 2010. Jianhui Qin (http://blog.csdn.net/jhqin)
+ */
 namespace {
 
-template <typename CharT>
-std::size_t cpy_cstr(CharT *des, std::size_t dlen, CharT const *src, std::size_t slen) noexcept {
+/// @brief X-bit unicode transformation format
+enum class ufmt {
+  utf8,
+  utf16,
+  utf32,
+};
+
+template <typename T, ufmt, typename = void>
+struct utf_compatible : std::false_type {};
+
+template <typename T>
+struct utf_compatible<T, ufmt::utf8, 
+  std::enable_if_t<std::is_fundamental<T>::value && (sizeof(T) == 1)>> : std::true_type {};
+
+template <typename T>
+struct utf_compatible<T, ufmt::utf16, 
+  std::enable_if_t<std::is_fundamental<T>::value && (sizeof(T) == 2)>> : std::true_type {};
+
+template <typename T>
+struct utf_compatible<T, ufmt::utf32, 
+  std::enable_if_t<std::is_fundamental<T>::value && (sizeof(T) == 4)>> : std::true_type {};
+
+template <typename T, ufmt Fmt>
+constexpr bool utf_compatible_v = utf_compatible<T, Fmt>::value;
+
+/**
+ * @brief UTF-32 --> UTF-8
+ */
+template <typename T, typename U>
+auto cvt_char(T src, U* des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf32> &&
+                      utf_compatible_v<U, ufmt::utf8>, std::size_t> {
+  if (src == 0) return 0;
+
+  constexpr std::uint8_t prefix[] = {
+    0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC
+  };
+  constexpr std::uint32_t codeup[] = {
+    0x80,      // U+00000000 - U+0000007F
+    0x800,     // U+00000080 - U+000007FF
+    0x10000,   // U+00000800 - U+0000FFFF
+    0x200000,  // U+00010000 - U+001FFFFF
+    0x4000000, // U+00200000 - U+03FFFFFF
+    0x80000000 // U+04000000 - U+7FFFFFFF
+  };
+
+  std::size_t i, len = sizeof(codeup) / sizeof(std::uint32_t);
+  for(i = 0; i < len; ++i) {
+    if (static_cast<std::uint32_t>(src) < codeup[i]) break;
+  }
+  if (i == len) return 0; // the src is invalid
+
+  len = i + 1;
+  if (des != nullptr) {
+    if (dlen > i) for (; i > 0; --i) {
+      des[i] = static_cast<U>((src & 0x3F) | 0x80);
+      src >>= 6;
+    }
+    des[0] = static_cast<U>(src | prefix[len - 1]);
+  }
+  return len;
+}
+
+/**
+ * @brief UTF-8 --> UTF-32
+ */
+template <typename T, typename U>
+auto cvt_char(T const *src, std::size_t slen, U &des) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf8> &&
+                      utf_compatible_v<U, ufmt::utf32>, std::size_t> {
+  if ((src == nullptr) || (*src) == 0) return 0;
+  if (slen == 0) return 0;
+
+  std::uint8_t b = (std::uint8_t)*(src++);
+
+  if (b < 0x80) {
+    des = b;
+    return 1;
+  }
+
+  if (b < 0xC0 || b > 0xFD) return 0; // the src is invalid
+
+  std::size_t len;
+  if (b < 0xE0) {
+    des = b & 0x1F;
+    len = 2;
+  } else if (b < 0xF0) {
+    des = b & 0x0F;
+    len = 3;
+  } else if (b < 0xF8) {
+    des = b & 0x07;
+    len = 4;
+  } else if (b < 0xFC) {
+    des = b & 0x03;
+    len = 5;
+  } else {
+    des = b & 0x01;
+    len = 6;
+  }
+
+  if (slen < len) return 0;
+  std::size_t i = 1;
+  for(; i < len; ++i) {
+    b = *(src++);
+    if ((b < 0x80) || (b > 0xBF)) return 0; // the src is invalid
+    des = (des << 6) + (b & 0x3F);
+  }
+  return len;
+}
+
+/**
+ * @brief UTF-32 --> UTF-16
+ */
+template <typename T, typename U>
+auto cvt_char(T src, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf32> &&
+                      utf_compatible_v<U, ufmt::utf16>, std::size_t> {
+  if (src == 0) return 0;
+
+  if (src <= 0xFFFF) {
+    if ((des != nullptr) && (dlen != 0)) {
+      (*des) = static_cast<U>(src);
+    }
+    return 1;
+  } else if (src <= 0xEFFFF) {
+    if ((des != nullptr) && (dlen > 1)) {
+      des[0] = static_cast<U>(0xD800 + (src >> 10) - 0x40);  // high
+      des[1] = static_cast<U>(0xDC00 + (src & 0x03FF));      // low
+    }
+    return 2;
+  }
+  return 0;
+}
+
+/**
+ * @brief UTF-16 --> UTF-32
+*/
+template <typename T, typename U>
+auto cvt_char(T const *src, std::size_t slen, U &des)
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf16> &&
+                      utf_compatible_v<U, ufmt::utf32>, std::size_t> {
+  if ((src == nullptr) || (*src) == 0) return 0;
+  if (slen == 0) return 0;
+
+  std::uint16_t w1 = src[0];
+  if ((w1 >= 0xD800) && (w1 <= 0xDFFF)) {
+    if (w1 < 0xDC00) {
+      if (slen < 2) return 0;
+      std::uint16_t w2 = src[1];
+      if ((w2 >= 0xDC00) && (w2 <= 0xDFFF)) {
+        des = (w2 & 0x03FF) + (((w1 & 0x03FF) + 0x40) << 10);
+        return 2;
+      }
+    }
+    return 0; // the src is invalid
+  }
+  des = w1;
+  return 1;
+}
+
+/**
+ * @brief UTF-16 --> UTF-8
+*/
+template <typename T, typename U>
+auto cvt_char(T src, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf16> &&
+                      utf_compatible_v<U, ufmt::utf8>, std::size_t> {
+  // make utf-16 to utf-32
+  std::uint32_t tmp;
+  if (cvt_char(&src, 1, tmp) != 1) return 0;
+  // make utf-32 to utf-8
+  return cvt_char(tmp, des, dlen);
+}
+
+/**
+ * @brief UTF-8 --> UTF-16
+*/
+template <typename T, typename U>
+auto cvt_char(T const *src, std::size_t slen, U &des)
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf8> &&
+                      utf_compatible_v<U, ufmt::utf16>, std::size_t> {
+  // make utf-8 to utf-32
+  std::uint32_t tmp;
+  std::size_t len = cvt_char(src, slen, tmp);
+  if (len == 0) return 0;
+  // make utf-32 to utf-16
+  if (cvt_char(tmp, &des, 1) != 1) return 0;
+  return len;
+}
+
+/**
+ * @brief UTF-32 string --> UTF-8/16 string
+*/
+template <typename T, typename U>
+auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf32> &&
+                     (utf_compatible_v<U, ufmt::utf16> || utf_compatible_v<U, ufmt::utf8>), std::size_t> {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  std::size_t num = 0, len = 0;
+  for (std::size_t i = 0; (i < slen) && ((*src) != 0); ++src, ++i) {
+    len = cvt_char(*src, des, dlen);
+    if (len == 0) return 0;
+    if (des != nullptr) {
+      des += len;
+      if (dlen < len) {
+        dlen = 0;
+      } else {
+        dlen -= len;
+      }
+    }
+    num += len;
+  }
+  return num;
+}
+
+/**
+ * @brief UTF-8/16 string --> UTF-32 string
+*/
+template <typename T, typename U>
+auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<U, ufmt::utf32> &&
+                     (utf_compatible_v<T, ufmt::utf16> || utf_compatible_v<T, ufmt::utf8>), std::size_t> {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  std::size_t num = 0;
+  for (std::size_t i = 0; (i < slen) && ((*src) != 0);) {
+    std::uint32_t tmp;
+    std::size_t len = cvt_char(src, slen - i, tmp);
+    if (len == 0) return 0;
+    if ((des != nullptr) && (dlen > 0)) {
+      (*des) = tmp;
+      ++des;
+      dlen -= 1;
+    }
+    src += len;
+    i   += len;
+    num += 1;
+  }
+  return num;
+}
+
+/**
+ * @brief UTF-8/16 string --> UTF-16/8 string
+*/
+template <typename T, typename U>
+auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<(utf_compatible_v<T, ufmt::utf8>  && utf_compatible_v<U, ufmt::utf16>) ||
+                      (utf_compatible_v<T, ufmt::utf16> && utf_compatible_v<U, ufmt::utf8>), std::size_t> {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  std::size_t num = 0;
+  for (std::size_t i = 0; (i < slen) && ((*src) != 0);) {
+    // make utf-x to utf-32
+    std::uint32_t tmp;
+    std::size_t len = cvt_char(src, slen - i, tmp);
+    if (len == 0) return 0;
+    src += len;
+    i   += len;
+    // make utf-32 to utf-y
+    len = cvt_char(tmp, des, dlen);
+    if (len == 0) return 0;
+    if (des != nullptr) {
+      des += len;
+      if (dlen < len) {
+        dlen = 0;
+      } else {
+        dlen -= len;
+      }
+    }
+    num += len;
+  }
+  return num;
+}
+
+template <typename T, typename U>
+auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<(sizeof(T) == sizeof(U)), std::size_t> {
   if ((des == nullptr) || (dlen == 0)) {
     return slen;
   }
   std::size_t r = (std::min)(slen, dlen);
-  std::memcpy(des, src, r * sizeof(CharT));
+  std::memcpy(des, src, r * sizeof(T));
   return r;
 }
 
 } // namespace
 
-template <>
-std::size_t cvt_cstr(char const *src, std::size_t slen, char *des, std::size_t dlen) noexcept {
-  return cpy_cstr(des, dlen, src, slen);
-}
+#define LIBIMP_DEF_CVT_CSTR_($char_t, $char_u) \
+  template <> \
+  std::size_t cvt_cstr($char_t const *src, std::size_t slen, $char_u *des, std::size_t dlen) noexcept { \
+    return cvt_cstr_utf(src, slen, des, dlen); \
+  }
+// #define LIBIMP_DEF_CVT_CSTR_($char_t, $char_u)
 
-template <>
-std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, wchar_t *des, std::size_t dlen) noexcept {
-  return cpy_cstr(des, dlen, src, slen);
-}
+LIBIMP_DEF_CVT_CSTR_(char    , char)
+LIBIMP_DEF_CVT_CSTR_(char    , wchar_t)
+LIBIMP_DEF_CVT_CSTR_(char    , char16_t)
+LIBIMP_DEF_CVT_CSTR_(char    , char32_t)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , wchar_t)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , char)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , char16_t)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , char32_t)
+LIBIMP_DEF_CVT_CSTR_(char16_t, char16_t)
+LIBIMP_DEF_CVT_CSTR_(char16_t, char)
+LIBIMP_DEF_CVT_CSTR_(char16_t, wchar_t)
+LIBIMP_DEF_CVT_CSTR_(char16_t, char32_t)
+LIBIMP_DEF_CVT_CSTR_(char32_t, char32_t)
+LIBIMP_DEF_CVT_CSTR_(char32_t, char)
+LIBIMP_DEF_CVT_CSTR_(char32_t, wchar_t)
+LIBIMP_DEF_CVT_CSTR_(char32_t, char16_t)
+
+#if defined(LIBIMP_CPP_20)
+LIBIMP_DEF_CVT_CSTR_(char8_t , char8_t)
+LIBIMP_DEF_CVT_CSTR_(char8_t , char)
+LIBIMP_DEF_CVT_CSTR_(char8_t , wchar_t)
+LIBIMP_DEF_CVT_CSTR_(char8_t , char16_t)
+LIBIMP_DEF_CVT_CSTR_(char8_t , char32_t)
+LIBIMP_DEF_CVT_CSTR_(char    , char8_t)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , char8_t)
+LIBIMP_DEF_CVT_CSTR_(char16_t, char8_t)
+LIBIMP_DEF_CVT_CSTR_(char32_t, char8_t)
+#endif
+
+#undef LIBIMP_DEF_CVT_CSTR_
 
 LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/posix/codecvt.h b/src/libimp/platform/posix/codecvt.h
deleted file mode 100644
index 0ba52c02..00000000
--- a/src/libimp/platform/posix/codecvt.h
+++ /dev/null
@@ -1,319 +0,0 @@
-/**
- * @file libimp/platform/win/codecvt.h
- * @author mutouyun (orz@orzz.org)
- */
-#pragma once
-
-#include <cstdint>
-#include <type_traits>
-
-#include "libimp/codecvt.h"
-#include "libimp/log.h"
-
-LIBIMP_NAMESPACE_BEG_
-
-/**
- * @brief The transform between local-character-set(UTF-8/GBK/...) and UTF-16/32
- * 
- * Modified from UnicodeConverter
- * Copyright (c) 2010. Jianhui Qin (http://blog.csdn.net/jhqin)
- */
-namespace {
-
-/// @brief X-bit unicode transformation format
-enum class ufmt {
-  utf8,
-  utf16,
-  utf32,
-};
-
-template <typename T, ufmt, typename = void>
-struct utf_compatible : std::false_type {};
-
-template <typename T>
-struct utf_compatible<T, ufmt::utf8, 
-  std::enable_if_t<std::is_fundamental<T>::value && (sizeof(T) == 1)>> : std::true_type {};
-
-template <typename T>
-struct utf_compatible<T, ufmt::utf16, 
-  std::enable_if_t<std::is_fundamental<T>::value && (sizeof(T) == 2)>> : std::true_type {};
-
-template <typename T>
-struct utf_compatible<T, ufmt::utf32, 
-  std::enable_if_t<std::is_fundamental<T>::value && (sizeof(T) == 4)>> : std::true_type {};
-
-template <typename T, ufmt Fmt>
-constexpr bool utf_compatible_v = utf_compatible<T, Fmt>::value;
-
-/**
- * @brief UTF-32 --> UTF-8
- */
-template <typename T, typename U>
-auto cvt_char(T src, U* des, std::size_t dlen) noexcept
-  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf32> &&
-                      utf_compatible_v<U, ufmt::utf8>, std::size_t> {
-  if (src == 0) return 0;
-
-  constexpr std::uint8_t prefix[] = {
-    0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC
-  };
-  constexpr std::uint32_t codeup[] = {
-    0x80,      // U+00000000 - U+0000007F
-    0x800,     // U+00000080 - U+000007FF
-    0x10000,   // U+00000800 - U+0000FFFF
-    0x200000,  // U+00010000 - U+001FFFFF
-    0x4000000, // U+00200000 - U+03FFFFFF
-    0x80000000 // U+04000000 - U+7FFFFFFF
-  };
-
-  std::size_t i, len = sizeof(codeup) / sizeof(std::uint32_t);
-  for(i = 0; i < len; ++i) {
-    if (static_cast<std::uint32_t>(src) < codeup[i]) break;
-  }
-  if (i == len) return 0; // the src is invalid
-
-  len = i + 1;
-  if (des != nullptr) {
-    if (dlen > i) for (; i > 0; --i) {
-      des[i] = static_cast<U>((src & 0x3F) | 0x80);
-      src >>= 6;
-    }
-    des[0] = static_cast<U>(src | prefix[len - 1]);
-  }
-  return len;
-}
-
-/**
- * @brief UTF-8 --> UTF-32
- */
-template <typename T, typename U>
-auto cvt_char(T const *src, std::size_t slen, U &des) noexcept
-  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf8> &&
-                      utf_compatible_v<U, ufmt::utf32>, std::size_t> {
-  if ((src == nullptr) || (*src) == 0) return 0;
-  if (slen == 0) return 0;
-
-  std::uint8_t b = (std::uint8_t)*(src++);
-
-  if (b < 0x80) {
-    des = b;
-    return 1;
-  }
-
-  if (b < 0xC0 || b > 0xFD) return 0; // the src is invalid
-
-  std::size_t len;
-  if (b < 0xE0) {
-    des = b & 0x1F;
-    len = 2;
-  } else if (b < 0xF0) {
-    des = b & 0x0F;
-    len = 3;
-  } else if (b < 0xF8) {
-    des = b & 0x07;
-    len = 4;
-  } else if (b < 0xFC) {
-    des = b & 0x03;
-    len = 5;
-  } else {
-    des = b & 0x01;
-    len = 6;
-  }
-
-  if (slen < len) return 0;
-  std::size_t i = 1;
-  for(; i < len; ++i) {
-    b = *(src++);
-    if ((b < 0x80) || (b > 0xBF)) return 0; // the src is invalid
-    des = (des << 6) + (b & 0x3F);
-  }
-  return len;
-}
-
-/**
- * @brief UTF-32 --> UTF-16
- */
-template <typename T, typename U>
-auto cvt_char(T src, U *des, std::size_t dlen) noexcept
-  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf32> &&
-                      utf_compatible_v<U, ufmt::utf16>, std::size_t> {
-  if (src == 0) return 0;
-
-  if (src <= 0xFFFF) {
-    if ((des != nullptr) && (dlen != 0)) {
-      (*des) = static_cast<U>(src);
-    }
-    return 1;
-  } else if (src <= 0xEFFFF) {
-    if ((des != nullptr) && (dlen > 1)) {
-      des[0] = static_cast<U>(0xD800 + (src >> 10) - 0x40);  // high
-      des[1] = static_cast<U>(0xDC00 + (src & 0x03FF));      // low
-    }
-    return 2;
-  }
-  return 0;
-}
-
-/**
- * @brief UTF-16 --> UTF-32
-*/
-template <typename T, typename U>
-auto cvt_char(T const *src, std::size_t slen, U &des)
-  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf16> &&
-                      utf_compatible_v<U, ufmt::utf32>, std::size_t> {
-  if ((src == nullptr) || (*src) == 0) return 0;
-  if (slen == 0) return 0;
-
-  std::uint16_t w1 = src[0];
-  if ((w1 >= 0xD800) && (w1 <= 0xDFFF)) {
-    if (w1 < 0xDC00) {
-      if (slen < 2) return 0;
-      std::uint16_t w2 = src[1];
-      if ((w2 >= 0xDC00) && (w2 <= 0xDFFF)) {
-        des = (w2 & 0x03FF) + (((w1 & 0x03FF) + 0x40) << 10);
-        return 2;
-      }
-    }
-    return 0; // the src is invalid
-  }
-  des = w1;
-  return 1;
-}
-
-/**
- * @brief UTF-16 --> UTF-8
-*/
-template <typename T, typename U>
-auto cvt_char(T src, U *des, std::size_t dlen) noexcept
-  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf16> &&
-                      utf_compatible_v<U, ufmt::utf8>, std::size_t> {
-  // make utf-16 to utf-32
-  std::uint32_t tmp;
-  if (cvt_char(&src, 1, tmp) != 1) return 0;
-  // make utf-32 to utf-8
-  return cvt_char(tmp, des, dlen);
-}
-
-/**
- * @brief UTF-8 --> UTF-16
-*/
-template <typename T, typename U>
-auto cvt_char(T const *src, std::size_t slen, U &des)
-  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf8> &&
-                      utf_compatible_v<U, ufmt::utf16>, std::size_t> {
-  // make utf-8 to utf-32
-  std::uint32_t tmp;
-  std::size_t len = cvt_char(src, slen, tmp);
-  if (len == 0) return 0;
-  // make utf-32 to utf-16
-  if (cvt_char(tmp, &des, 1) != 1) return 0;
-  return len;
-}
-
-/**
- * @brief UTF-32 string --> UTF-8/16 string
-*/
-template <typename T, typename U>
-auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
-  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf32> &&
-                     (utf_compatible_v<U, ufmt::utf16> || utf_compatible_v<U, ufmt::utf8>), std::size_t> {
-  LIBIMP_LOG_();
-  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
-    log.error("source string is empty.");
-    return 0;
-  }
-  std::size_t num = 0, len = 0;
-  for (std::size_t i = 0; (i < slen) && ((*src) != 0); ++src, ++i) {
-    len = cvt_char(*src, des, dlen);
-    if (len == 0) return 0;
-    if (des != nullptr) {
-      des += len;
-      if (dlen < len) {
-        dlen = 0;
-      } else {
-        dlen -= len;
-      }
-    }
-    num += len;
-  }
-  return num;
-}
-
-/**
- * @brief UTF-8/16 string --> UTF-32 string
-*/
-template <typename T, typename U>
-auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
-  -> std::enable_if_t<utf_compatible_v<U, ufmt::utf32> &&
-                     (utf_compatible_v<T, ufmt::utf16> || utf_compatible_v<T, ufmt::utf8>), std::size_t> {
-  LIBIMP_LOG_();
-  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
-    log.error("source string is empty.");
-    return 0;
-  }
-  std::size_t num = 0;
-  for (std::size_t i = 0; (i < slen) && ((*src) != 0);) {
-    std::uint32_t tmp;
-    std::size_t len = cvt_char(src, slen - i, tmp);
-    if (len == 0) return 0;
-    if ((des != nullptr) && (dlen > 0)) {
-      (*des) = tmp;
-      ++des;
-      dlen -= 1;
-    }
-    src += len;
-    i   += len;
-    num += 1;
-  }
-  return num;
-}
-
-/**
- * @brief UTF-8/16 string --> UTF-16/8 string
-*/
-template <typename T, typename U>
-auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
-  -> std::enable_if_t<(utf_compatible_v<T, ufmt::utf8>  && utf_compatible_v<U, ufmt::utf16>) ||
-                      (utf_compatible_v<T, ufmt::utf16> && utf_compatible_v<U, ufmt::utf8>), std::size_t> {
-  LIBIMP_LOG_();
-  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
-    log.error("source string is empty.");
-    return 0;
-  }
-  std::size_t num = 0;
-  for (std::size_t i = 0; (i < slen) && ((*src) != 0);) {
-    // make utf-x to utf-32
-    std::uint32_t tmp;
-    std::size_t len = cvt_char(src, slen - i, tmp);
-    if (len == 0) return 0;
-    src += len;
-    i   += len;
-    // make utf-32 to utf-y
-    len = cvt_char(tmp, des, dlen);
-    if (len == 0) return 0;
-    if (des != nullptr) {
-      des += len;
-      if (dlen < len) {
-        dlen = 0;
-      } else {
-        dlen -= len;
-      }
-    }
-    num += len;
-  }
-  return num;
-}
-
-} // namespace
-
-template <>
-std::size_t cvt_cstr(char const *src, std::size_t slen, wchar_t *des, std::size_t dlen) noexcept {
-  return cvt_cstr_utf(src, slen, des, dlen);
-}
-
-template <>
-std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char *des, std::size_t dlen) noexcept {
-  return cvt_cstr_utf(src, slen, des, dlen);
-}
-
-LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/win/codecvt.h b/src/libimp/platform/win/codecvt.h
deleted file mode 100644
index 86a545c7..00000000
--- a/src/libimp/platform/win/codecvt.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/**
- * @file libimp/platform/win/codecvt.h
- * @author mutouyun (orz@orzz.org)
- */
-#pragma once
-
-#include <Windows.h>
-
-#include "libimp/codecvt.h"
-#include "libimp/log.h"
-
-LIBIMP_NAMESPACE_BEG_
-
-/**
- * @brief The transform between local-character-set(UTF-8/GBK/...) and UTF-16/32
- * 
- * https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-multibytetowidechar
- * https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-widechartomultibyte
- * 
- * CP_ACP       : The system default Windows ANSI code page.
- * CP_MACCP     : The current system Macintosh code page.
- * CP_OEMCP     : The current system OEM code page.
- * CP_SYMBOL    : Symbol code page (42).
- * CP_THREAD_ACP: The Windows ANSI code page for the current thread.
- * CP_UTF7      : UTF-7. Use this value only when forced by a 7-bit transport mechanism. Use of UTF-8 is preferred.
- * CP_UTF8      : UTF-8.
- */
-
-template <>
-std::size_t cvt_cstr(char const *src, std::size_t slen, wchar_t *des, std::size_t dlen) noexcept {
-  LIBIMP_LOG_();
-  int r = ::MultiByteToWideChar(CP_UTF8, 0, src, (int)slen, des, (int)dlen);
-  if (r <= 0) {
-    log.error("MultiByteToWideChar fails. return = {}", ::GetLastError());
-    return 0;
-  }
-  return (std::size_t)r;
-}
-
-template <>
-std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char *des, std::size_t dlen) noexcept {
-  LIBIMP_LOG_();
-  int r = ::WideCharToMultiByte(CP_UTF8, 0, src, (int)slen, des, (int)dlen, nullptr, nullptr);
-  if (r <= 0) {
-    log.error("WideCharToMultiByte fails. return = {}", ::GetLastError());
-    return 0;
-  }
-  return (std::size_t)r;
-}
-
-LIBIMP_NAMESPACE_END_

From 01c28816a2ed24fc9feafcf6a63121be8311fa32 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 13 Aug 2022 18:02:25 +0800
Subject: [PATCH 044/272] add: [system] add features

---
 include/libimp/system.h            | 30 +++++++++++
 src/libimp/platform/posix/system.h | 47 ++++++++++++++++++
 src/libimp/platform/win/system.h   | 80 ++++++++++++++++++++++++++++++
 src/libimp/system.cpp              |  6 +++
 test/test_imp_system.cpp           | 41 +++++++++++++++
 5 files changed, 204 insertions(+)
 create mode 100644 include/libimp/system.h
 create mode 100644 src/libimp/platform/posix/system.h
 create mode 100644 src/libimp/platform/win/system.h
 create mode 100644 src/libimp/system.cpp
 create mode 100644 test/test_imp_system.cpp

diff --git a/include/libimp/system.h b/include/libimp/system.h
new file mode 100644
index 00000000..208f40d8
--- /dev/null
+++ b/include/libimp/system.h
@@ -0,0 +1,30 @@
+/**
+ * @file libimp/system.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Isolation and encapsulation of system APIs
+ * @date 2022-08-07
+ */
+#pragma once
+
+#include <string>
+
+#include "libimp/def.h"
+#include "libimp/export.h"
+#include "libimp/result.h"
+
+LIBIMP_NAMESPACE_BEG_
+namespace sys {
+
+/**
+ * @brief Get/Set the system error code
+ */
+LIBIMP_EXPORT result_code error_code() noexcept;
+LIBIMP_EXPORT void error_code(result_code) noexcept;
+
+/**
+ * @brief Gets a text description of the system error
+ */
+LIBIMP_EXPORT std::string error_msg(result_code) noexcept;
+
+} // namespace sys
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
new file mode 100644
index 00000000..57396a93
--- /dev/null
+++ b/src/libimp/platform/posix/system.h
@@ -0,0 +1,47 @@
+/**
+ * @file libimp/platform/posix/system.h
+ * @author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <exception>
+#include <memory>
+#include <type_traits>
+
+#include <errno.h>
+#include <string.h>
+
+#include "libimp/system.h"
+#include "libimp/log.h"
+
+LIBIMP_NAMESPACE_BEG_
+namespace sys {
+
+/**
+ * @brief Get the system error code
+ * https://man7.org/linux/man-pages/man3/errno.3.html
+ */
+result_code error_code() noexcept {
+  auto err = errno;
+  if (err == 0) return {true};
+  return {false, std::uint64_t(err)};
+}
+
+/**
+ * @brief Set the system error code
+ * https://man7.org/linux/man-pages/man3/errno.3.html
+ */
+void error_code(result_code code) noexcept {
+  errno = code ? 0 : (int)code.value();
+}
+
+/**
+ * @brief Gets a text description of the system error
+ * https://man7.org/linux/man-pages/man3/strerror_l.3.html
+ */
+std::string error_msg(result_code code) noexcept {
+  return {};
+}
+
+} // namespace sys
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
new file mode 100644
index 00000000..b4c6a038
--- /dev/null
+++ b/src/libimp/platform/win/system.h
@@ -0,0 +1,80 @@
+/**
+ * @file libimp/platform/win/system.h
+ * @author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <exception>
+#include <memory>
+#include <type_traits>
+
+#include <Windows.h>
+#include <tchar.h>
+
+#include "libimp/system.h"
+#include "libimp/log.h"
+#include "libimp/codecvt.h"
+
+LIBIMP_NAMESPACE_BEG_
+namespace sys {
+
+/**
+ * @brief Get the system error code
+ * https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-getlasterror
+ */
+result_code error_code() noexcept {
+  auto err = ::GetLastError();
+  if (err == ERROR_SUCCESS) return {true};
+  return {false, std::uint64_t(err)};
+}
+
+/**
+ * @brief Set the system error code
+ * https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-setlasterror
+ */
+void error_code(result_code code) noexcept {
+  DWORD err = code ? ERROR_SUCCESS : (DWORD)code.value();
+  ::SetLastError(err);
+}
+
+/**
+ * @brief Gets a text description of the system error
+ * https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-formatmessage
+ */
+std::string error_msg(result_code code) noexcept {
+  LIBIMP_LOG_();
+  try {
+    DWORD err = code ? ERROR_SUCCESS : (DWORD)code.value();
+    LPTSTR lpErrText = NULL;
+    if (::FormatMessage(
+          FORMAT_MESSAGE_ALLOCATE_BUFFER | 
+          FORMAT_MESSAGE_FROM_SYSTEM | 
+          FORMAT_MESSAGE_IGNORE_INSERTS,
+          NULL,
+          err,
+          MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+          (LPTSTR)&lpErrText,
+          0, NULL) == 0) {
+      log.error("FormatMessage fails. return = {}", ::GetLastError());
+      return {};
+    }
+    LIBIMP_UNUSED auto buf_guard = std::unique_ptr<std::remove_pointer_t<LPVOID>, 
+                                                   void(*)(LPVOID)> {
+      lpErrText, [](LPVOID lp) { ::LocalFree(lp); }
+    };
+    std::size_t msg_len = ::_tcslen(lpErrText);
+    std::size_t len = cvt_cstr(lpErrText, msg_len, (char *)nullptr, 0);
+    if (len == 0) {
+      return {};
+    }
+    std::string ret(len, '\0');
+    cvt_cstr(lpErrText, msg_len, &ret[0], ret.size());
+    return ret;
+  } catch (std::exception const &e) {
+    log.failed(e.what());
+  }
+  return {};
+}
+
+} // namespace sys
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/system.cpp b/src/libimp/system.cpp
new file mode 100644
index 00000000..54a178f8
--- /dev/null
+++ b/src/libimp/system.cpp
@@ -0,0 +1,6 @@
+#include "libimp/detect_plat.h"
+#if defined(LIBIMP_OS_WIN)
+#include "libimp/platform/win/system.h"
+#else
+#include "libimp/platform/posix/system.h"
+#endif
\ No newline at end of file
diff --git a/test/test_imp_system.cpp b/test/test_imp_system.cpp
new file mode 100644
index 00000000..c3d61d64
--- /dev/null
+++ b/test/test_imp_system.cpp
@@ -0,0 +1,41 @@
+
+#include "gtest/gtest.h"
+
+#include "libimp/system.h"
+#include "libimp/detect_plat.h"
+#include "libimp/codecvt.h"
+
+#if defined(LIBIMP_OS_WIN)
+#include <WinError.h>
+#else
+#endif
+
+TEST(system, error_code) {
+  EXPECT_TRUE(imp::sys::error_code());
+
+  imp::sys::error_code({false, 111});
+  auto err = imp::sys::error_code();
+  EXPECT_FALSE(err);
+  EXPECT_EQ(err.value(), 111);
+
+  imp::sys::error_code({});
+  EXPECT_TRUE(imp::sys::error_code());
+}
+
+TEST(system, error_msg) {
+#if defined(LIBIMP_OS_WIN)
+  {
+    std::u16string u16_txt = u"操作成功完成。\r\n";
+    std::string s_txt;
+    imp::cvt_sstr(u16_txt, s_txt);
+    EXPECT_EQ(imp::sys::error_msg({}), s_txt);
+  }
+  {
+    std::u16string u16_txt = u"句柄无效。\r\n";
+    std::string s_txt;
+    imp::cvt_sstr(u16_txt, s_txt);
+    EXPECT_EQ(imp::sys::error_msg({false, ERROR_INVALID_HANDLE}), s_txt);
+  }
+#else
+#endif
+}
\ No newline at end of file

From 2abfebd2a0d79a5cd5a7a846be7a156dcb1b7bf2 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 13 Aug 2022 18:05:43 +0800
Subject: [PATCH 045/272] add: [test] try to print system error code

---
 test/test_imp_system.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/test/test_imp_system.cpp b/test/test_imp_system.cpp
index c3d61d64..d89a3d71 100644
--- a/test/test_imp_system.cpp
+++ b/test/test_imp_system.cpp
@@ -1,5 +1,8 @@
 
+#include <iostream>
+
 #include "gtest/gtest.h"
+#include "fmt/format.h"
 
 #include "libimp/system.h"
 #include "libimp/detect_plat.h"
@@ -11,7 +14,7 @@
 #endif
 
 TEST(system, error_code) {
-  EXPECT_TRUE(imp::sys::error_code());
+  std::cout << fmt::format("{}\n", imp::sys::error_code());
 
   imp::sys::error_code({false, 111});
   auto err = imp::sys::error_code();

From 9cbdcbd54fd52928ae1abb222d39a37f650ea76b Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 13 Aug 2022 18:16:01 +0800
Subject: [PATCH 046/272] fix: [test] system.error_msg for Windows

---
 test/test_imp_system.cpp | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/test/test_imp_system.cpp b/test/test_imp_system.cpp
index d89a3d71..e6e9f937 100644
--- a/test/test_imp_system.cpp
+++ b/test/test_imp_system.cpp
@@ -9,7 +9,7 @@
 #include "libimp/codecvt.h"
 
 #if defined(LIBIMP_OS_WIN)
-#include <WinError.h>
+#include <Windows.h>
 #else
 #endif
 
@@ -27,16 +27,28 @@ TEST(system, error_code) {
 
 TEST(system, error_msg) {
 #if defined(LIBIMP_OS_WIN)
+  std::u16string u16_ok, u16_err;
+  LANGID lId = ::GetSystemDefaultLangID();
+  switch (lId) {
+  case 0x0804:
+    u16_ok  = u"操作成功完成。\r\n";
+    u16_err = u"句柄无效。\r\n";
+    break;
+  case 0x0409:
+    u16_ok  = u"The operation completed successfully.\r\n";
+    u16_err = u"The handle is invalid.\r\n";
+    break;
+  default:
+    return;
+  }
   {
-    std::u16string u16_txt = u"操作成功完成。\r\n";
     std::string s_txt;
-    imp::cvt_sstr(u16_txt, s_txt);
+    imp::cvt_sstr(u16_ok, s_txt);
     EXPECT_EQ(imp::sys::error_msg({}), s_txt);
   }
   {
-    std::u16string u16_txt = u"句柄无效。\r\n";
     std::string s_txt;
-    imp::cvt_sstr(u16_txt, s_txt);
+    imp::cvt_sstr(u16_err, s_txt);
     EXPECT_EQ(imp::sys::error_msg({false, ERROR_INVALID_HANDLE}), s_txt);
   }
 #else

From bd198cb6e2e7034aad3951605a7953cd9ff8b352 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 13 Aug 2022 18:28:19 +0800
Subject: [PATCH 047/272] upd: [system] adjust the error_msg error print in
 Windows

---
 src/libimp/platform/win/system.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index b4c6a038..be23f922 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -55,7 +55,7 @@ std::string error_msg(result_code code) noexcept {
           MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
           (LPTSTR)&lpErrText,
           0, NULL) == 0) {
-      log.error("FormatMessage fails. return = {}", ::GetLastError());
+      log.error("FormatMessage fails. return = {}", error_code());
       return {};
     }
     LIBIMP_UNUSED auto buf_guard = std::unique_ptr<std::remove_pointer_t<LPVOID>, 

From cbda80e4b831f5edf5e32b045fd9734de3cb91f7 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 13 Aug 2022 18:35:29 +0800
Subject: [PATCH 048/272] add: [system] error_msg for linux

---
 src/libimp/platform/posix/system.h | 12 +++++++-----
 src/libimp/platform/win/system.h   |  2 +-
 test/test_imp_system.cpp           |  1 +
 3 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index 57396a93..15296436 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -4,10 +4,6 @@
  */
 #pragma once
 
-#include <exception>
-#include <memory>
-#include <type_traits>
-
 #include <errno.h>
 #include <string.h>
 
@@ -40,7 +36,13 @@ void error_code(result_code code) noexcept {
  * https://man7.org/linux/man-pages/man3/strerror_l.3.html
  */
 std::string error_msg(result_code code) noexcept {
-  return {};
+  LIBIMP_LOG_();
+  char msg_buf[256] {};
+  if (::strerror_r((int)code.value(), msg_buf, sizeof(msg_buf)) != 0) {
+    log.error("strerror_r fails. return = {}", error_code());
+    return {};
+  }
+  return msg_buf;
 }
 
 } // namespace sys
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index be23f922..5820e037 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -44,7 +44,7 @@ void error_code(result_code code) noexcept {
 std::string error_msg(result_code code) noexcept {
   LIBIMP_LOG_();
   try {
-    DWORD err = code ? ERROR_SUCCESS : (DWORD)code.value();
+    DWORD err = (DWORD)code.value();
     LPTSTR lpErrText = NULL;
     if (::FormatMessage(
           FORMAT_MESSAGE_ALLOCATE_BUFFER | 
diff --git a/test/test_imp_system.cpp b/test/test_imp_system.cpp
index e6e9f937..c64592f0 100644
--- a/test/test_imp_system.cpp
+++ b/test/test_imp_system.cpp
@@ -52,5 +52,6 @@ TEST(system, error_msg) {
     EXPECT_EQ(imp::sys::error_msg({false, ERROR_INVALID_HANDLE}), s_txt);
   }
 #else
+  imp::sys::error_msg({false, 1234}, "Unknown error nnn");
 #endif
 }
\ No newline at end of file

From d40f8db30720e2de34ef2d37207ff5533e349d81 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 13 Aug 2022 18:36:57 +0800
Subject: [PATCH 049/272] fix: [test] error_msg for linux

---
 test/test_imp_system.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/test_imp_system.cpp b/test/test_imp_system.cpp
index c64592f0..6b5677c6 100644
--- a/test/test_imp_system.cpp
+++ b/test/test_imp_system.cpp
@@ -52,6 +52,6 @@ TEST(system, error_msg) {
     EXPECT_EQ(imp::sys::error_msg({false, ERROR_INVALID_HANDLE}), s_txt);
   }
 #else
-  imp::sys::error_msg({false, 1234}, "Unknown error nnn");
+  EXPECT_EQ(imp::sys::error_msg({false, 1234}), "Unknown error nnn");
 #endif
 }
\ No newline at end of file

From 0a439427ee25913a2702eb2086f17a22da4ab832 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 13 Aug 2022 18:39:47 +0800
Subject: [PATCH 050/272] fix: [test] error_msg for linux

---
 test/test_imp_system.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/test/test_imp_system.cpp b/test/test_imp_system.cpp
index 6b5677c6..711e3eae 100644
--- a/test/test_imp_system.cpp
+++ b/test/test_imp_system.cpp
@@ -52,6 +52,7 @@ TEST(system, error_msg) {
     EXPECT_EQ(imp::sys::error_msg({false, ERROR_INVALID_HANDLE}), s_txt);
   }
 #else
-  EXPECT_EQ(imp::sys::error_msg({false, 1234}), "Unknown error nnn");
+  EXPECT_EQ(imp::sys::error_msg({}), "");
+  EXPECT_EQ(imp::sys::error_msg({false, EINVAL}), "");
 #endif
 }
\ No newline at end of file

From 0541e45b92ec85c3ca42030e3a0520bd9b4d91f8 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 14 Aug 2022 00:31:42 +0800
Subject: [PATCH 051/272] =?UTF-8?q?fix:=20=E2=80=98dummy=E2=80=99=20may=20?=
 =?UTF-8?q?be=20used=20uninitialized?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 3rdparty/gtest/src/gtest-death-test.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/3rdparty/gtest/src/gtest-death-test.cc b/3rdparty/gtest/src/gtest-death-test.cc
index da09a1cf..7419ba2c 100644
--- a/3rdparty/gtest/src/gtest-death-test.cc
+++ b/3rdparty/gtest/src/gtest-death-test.cc
@@ -1296,8 +1296,8 @@ static void StackLowerThanAddress(const void* ptr, bool* result) {
 GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
 GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
 static bool StackGrowsDown() {
-  int dummy;
-  bool result;
+  int dummy {};
+  bool result {};
   StackLowerThanAddress(&dummy, &result);
   return result;
 }

From 12f415fd19d002680ca2b08dae7acf91bd1db634 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 14 Aug 2022 00:34:50 +0800
Subject: [PATCH 052/272] fix: [log] generic constructor may shadow the default
 copy constructor

---
 CMakeLists.txt       | 1 +
 include/libimp/log.h | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c33a54bc..046eb217 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,6 +12,7 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -DNDEBUG")
 if(NOT MSVC)
   set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O2")
+  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_DEBUG} -g -rdynamic")
 endif()
 
 if (MSVC)
diff --git a/include/libimp/log.h b/include/libimp/log.h
index 34a81901..92ea4354 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -92,7 +92,8 @@ class LIBIMP_EXPORT printer {
 public:
   printer() noexcept = default;
 
-  template <typename T>
+  template <typename T, 
+            typename = std::enable_if_t<!std::is_same<printer, T>::value>>
   printer(T &p) noexcept
     : objp_  (static_cast<void *>(&p))
     , vtable_(detail_log::traits<T>::make_vtable()) {}

From c51395c03341eb8c6cb22be3cfccd0d7ad864f6a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 14 Aug 2022 12:52:21 +0800
Subject: [PATCH 053/272] upd: [log] completion annotation

---
 include/libimp/log.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index 92ea4354..9c6bd99a 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -93,6 +93,7 @@ class LIBIMP_EXPORT printer {
   printer() noexcept = default;
 
   template <typename T, 
+            /// @brief generic constructor may shadow the default copy constructor
             typename = std::enable_if_t<!std::is_same<printer, T>::value>>
   printer(T &p) noexcept
     : objp_  (static_cast<void *>(&p))

From 6329d6c66b76f514eecf468ad69f8e17e405ad39 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 14 Aug 2022 13:25:21 +0800
Subject: [PATCH 054/272] add: [system] obtained the string describing error
 number in Linux

---
 src/libimp/platform/posix/system.h | 7 ++++++-
 test/test_imp_system.cpp           | 5 +++--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index 15296436..21cc55c4 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -34,15 +34,20 @@ void error_code(result_code code) noexcept {
 /**
  * @brief Gets a text description of the system error
  * https://man7.org/linux/man-pages/man3/strerror_l.3.html
+ * https://manpages.ubuntu.com/manpages/xenial/en/man3/strerror.3.html
  */
 std::string error_msg(result_code code) noexcept {
-  LIBIMP_LOG_();
   char msg_buf[256] {};
+#if ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE)
+  LIBIMP_LOG_();
   if (::strerror_r((int)code.value(), msg_buf, sizeof(msg_buf)) != 0) {
     log.error("strerror_r fails. return = {}", error_code());
     return {};
   }
   return msg_buf;
+#else
+  return ::strerror_r((int)code.value(), msg_buf, sizeof(msg_buf));
+#endif
 }
 
 } // namespace sys
diff --git a/test/test_imp_system.cpp b/test/test_imp_system.cpp
index 711e3eae..d7ed936c 100644
--- a/test/test_imp_system.cpp
+++ b/test/test_imp_system.cpp
@@ -52,7 +52,8 @@ TEST(system, error_msg) {
     EXPECT_EQ(imp::sys::error_msg({false, ERROR_INVALID_HANDLE}), s_txt);
   }
 #else
-  EXPECT_EQ(imp::sys::error_msg({}), "");
-  EXPECT_EQ(imp::sys::error_msg({false, EINVAL}), "");
+  EXPECT_EQ(imp::sys::error_msg({false, 1234}), "Unknown error 1234");
+  EXPECT_EQ(imp::sys::error_msg({}), "Success");
+  EXPECT_EQ(imp::sys::error_msg({false, EINVAL}), "Invalid argument");
 #endif
 }
\ No newline at end of file

From 64a3ba24e73c3f59526f97e9cccfb014ec128833 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 14 Aug 2022 13:45:21 +0800
Subject: [PATCH 055/272] upd: [system] adjust the output format of the error
 message

---
 include/libimp/system.h            |  5 +++++
 src/libimp/platform/posix/system.h |  2 +-
 src/libimp/platform/win/system.h   |  2 +-
 src/libimp/system.cpp              | 18 +++++++++++++++++-
 test/test_imp_system.cpp           | 14 +++++++-------
 5 files changed, 31 insertions(+), 10 deletions(-)

diff --git a/include/libimp/system.h b/include/libimp/system.h
index 208f40d8..72646824 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -24,6 +24,11 @@ LIBIMP_EXPORT void error_code(result_code) noexcept;
 /**
  * @brief Gets a text description of the system error
  */
+LIBIMP_EXPORT std::string error_str(result_code) noexcept;
+
+/**
+ * @brief @brief A text description string with an error number attached
+ */
 LIBIMP_EXPORT std::string error_msg(result_code) noexcept;
 
 } // namespace sys
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index 21cc55c4..b05d76ed 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -36,7 +36,7 @@ void error_code(result_code code) noexcept {
  * https://man7.org/linux/man-pages/man3/strerror_l.3.html
  * https://manpages.ubuntu.com/manpages/xenial/en/man3/strerror.3.html
  */
-std::string error_msg(result_code code) noexcept {
+std::string error_str(result_code code) noexcept {
   char msg_buf[256] {};
 #if ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE)
   LIBIMP_LOG_();
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index 5820e037..b50f2bc9 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -41,7 +41,7 @@ void error_code(result_code code) noexcept {
  * @brief Gets a text description of the system error
  * https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-formatmessage
  */
-std::string error_msg(result_code code) noexcept {
+std::string error_str(result_code code) noexcept {
   LIBIMP_LOG_();
   try {
     DWORD err = (DWORD)code.value();
diff --git a/src/libimp/system.cpp b/src/libimp/system.cpp
index 54a178f8..94e56bcb 100644
--- a/src/libimp/system.cpp
+++ b/src/libimp/system.cpp
@@ -3,4 +3,20 @@
 #include "libimp/platform/win/system.h"
 #else
 #include "libimp/platform/posix/system.h"
-#endif
\ No newline at end of file
+#endif
+
+#include "fmt/format.h"
+
+LIBIMP_NAMESPACE_BEG_
+namespace sys {
+
+std::string error_msg(result_code code) noexcept {
+  try {
+    return ::fmt::format("[{}, \"{}\"]", code.value(), error_str(code));
+  } catch (...) {
+    return error_str(code);
+  }
+}
+
+} // namespace sys
+LIBIMP_NAMESPACE_END_
diff --git a/test/test_imp_system.cpp b/test/test_imp_system.cpp
index d7ed936c..73c7568b 100644
--- a/test/test_imp_system.cpp
+++ b/test/test_imp_system.cpp
@@ -14,7 +14,7 @@
 #endif
 
 TEST(system, error_code) {
-  std::cout << fmt::format("{}\n", imp::sys::error_code());
+  std::cout << fmt::format("{}\n", imp::sys::error_msg(imp::sys::error_code()));
 
   imp::sys::error_code({false, 111});
   auto err = imp::sys::error_code();
@@ -25,7 +25,7 @@ TEST(system, error_code) {
   EXPECT_TRUE(imp::sys::error_code());
 }
 
-TEST(system, error_msg) {
+TEST(system, error_str) {
 #if defined(LIBIMP_OS_WIN)
   std::u16string u16_ok, u16_err;
   LANGID lId = ::GetSystemDefaultLangID();
@@ -44,16 +44,16 @@ TEST(system, error_msg) {
   {
     std::string s_txt;
     imp::cvt_sstr(u16_ok, s_txt);
-    EXPECT_EQ(imp::sys::error_msg({}), s_txt);
+    EXPECT_EQ(imp::sys::error_str({}), s_txt);
   }
   {
     std::string s_txt;
     imp::cvt_sstr(u16_err, s_txt);
-    EXPECT_EQ(imp::sys::error_msg({false, ERROR_INVALID_HANDLE}), s_txt);
+    EXPECT_EQ(imp::sys::error_str({false, ERROR_INVALID_HANDLE}), s_txt);
   }
 #else
-  EXPECT_EQ(imp::sys::error_msg({false, 1234}), "Unknown error 1234");
-  EXPECT_EQ(imp::sys::error_msg({}), "Success");
-  EXPECT_EQ(imp::sys::error_msg({false, EINVAL}), "Invalid argument");
+  EXPECT_EQ(imp::sys::error_str({false, 1234}), "Unknown error 1234");
+  EXPECT_EQ(imp::sys::error_str({}), "Success");
+  EXPECT_EQ(imp::sys::error_str({false, EINVAL}), "Invalid argument");
 #endif
 }
\ No newline at end of file

From c604fadbea56b4c913678aaccaff6cbb4bacc0fd Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 14 Aug 2022 21:55:44 +0800
Subject: [PATCH 056/272] add: [system] (TBD) sys::conf page_size

---
 include/libimp/system.h            |  8 ++++++++
 src/libimp/platform/posix/system.h | 22 ++++++++++++++++++++++
 test/test_imp_system.cpp           |  4 ++++
 3 files changed, 34 insertions(+)

diff --git a/include/libimp/system.h b/include/libimp/system.h
index 72646824..ba542d5b 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -31,5 +31,13 @@ LIBIMP_EXPORT std::string error_str(result_code) noexcept;
  */
 LIBIMP_EXPORT std::string error_msg(result_code) noexcept;
 
+/**
+ * @brief Get system configuration information at run time
+ */
+enum class info : std::int32_t {
+  page_size,
+};
+LIBIMP_EXPORT std::int64_t conf(info) noexcept;
+
 } // namespace sys
 LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index b05d76ed..44d917a5 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -6,6 +6,7 @@
 
 #include <errno.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "libimp/system.h"
 #include "libimp/log.h"
@@ -50,5 +51,26 @@ std::string error_str(result_code code) noexcept {
 #endif
 }
 
+/**
+ * @brief Gets configuration information at run time
+ * https://man7.org/linux/man-pages/man2/getpagesize.2.html
+ * https://man7.org/linux/man-pages/man3/sysconf.3.html
+ */
+std::int64_t conf(info r) noexcept {
+  LIBIMP_LOG_();
+  switch (r) {
+  case info::page_size: {
+      auto val = ::sysconf(_SC_PAGESIZE);
+      if (val >= 0) return (std::int64_t)val;
+    }
+    break;
+  default:
+    log.error("invalid info = {}", enum_cast(r));
+    return -1;
+  }
+  log.error("info = {}, error = {}", enum_cast(r), error_msg(error_code()));
+  return -1;
+}
+
 } // namespace sys
 LIBIMP_NAMESPACE_END_
diff --git a/test/test_imp_system.cpp b/test/test_imp_system.cpp
index 73c7568b..7b85fc4e 100644
--- a/test/test_imp_system.cpp
+++ b/test/test_imp_system.cpp
@@ -56,4 +56,8 @@ TEST(system, error_str) {
   EXPECT_EQ(imp::sys::error_str({}), "Success");
   EXPECT_EQ(imp::sys::error_str({false, EINVAL}), "Invalid argument");
 #endif
+}
+
+TEST(system, conf) {
+  EXPECT_EQ(imp::sys::conf(imp::sys::info::page_size), 4096);
 }
\ No newline at end of file

From db2b2b38ecb4912e031d6585df47243fda7e81ab Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 14 Aug 2022 22:01:49 +0800
Subject: [PATCH 057/272] add: [system] sys::conf page_size for win

---
 include/libimp/system.h            |  3 ++-
 src/libimp/platform/posix/system.h |  6 +++---
 src/libimp/platform/win/system.h   | 20 ++++++++++++++++++++
 3 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/include/libimp/system.h b/include/libimp/system.h
index ba542d5b..ceba4072 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <string>
+#include <cstdint>
 
 #include "libimp/def.h"
 #include "libimp/export.h"
@@ -27,7 +28,7 @@ LIBIMP_EXPORT void error_code(result_code) noexcept;
 LIBIMP_EXPORT std::string error_str(result_code) noexcept;
 
 /**
- * @brief @brief A text description string with an error number attached
+ * @brief A text description string with an error number attached
  */
 LIBIMP_EXPORT std::string error_msg(result_code) noexcept;
 
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index 44d917a5..a786ab46 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -60,10 +60,10 @@ std::int64_t conf(info r) noexcept {
   LIBIMP_LOG_();
   switch (r) {
   case info::page_size: {
-      auto val = ::sysconf(_SC_PAGESIZE);
-      if (val >= 0) return (std::int64_t)val;
-    }
+    auto val = ::sysconf(_SC_PAGESIZE);
+    if (val >= 0) return (std::int64_t)val;
     break;
+  }
   default:
     log.error("invalid info = {}", enum_cast(r));
     return -1;
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index b50f2bc9..d412a651 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -14,6 +14,7 @@
 #include "libimp/system.h"
 #include "libimp/log.h"
 #include "libimp/codecvt.h"
+#include "libimp/enum_cast.h"
 
 LIBIMP_NAMESPACE_BEG_
 namespace sys {
@@ -76,5 +77,24 @@ std::string error_str(result_code code) noexcept {
   return {};
 }
 
+/**
+ * @brief Retrieves information about the current system
+ * https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsysteminfo
+ * https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getnativesysteminfo
+ */
+std::int64_t conf(info r) noexcept {
+  LIBIMP_LOG_();
+  switch (r) {
+  case info::page_size: {
+    ::SYSTEM_INFO info {};
+    ::GetNativeSystemInfo(&info);
+    return (std::int64_t)info.dwPageSize;
+  }
+  default:
+    log.error("invalid info = {}", enum_cast(r));
+    return -1;
+  }
+}
+
 } // namespace sys
 LIBIMP_NAMESPACE_END_

From fa3469efe6de50910596815b9a1caa1baffcc98d Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Fri, 19 Aug 2022 12:03:25 +0800
Subject: [PATCH 058/272] fix: [cmake] symbol exports for dynamic libraries

---
 src/libipc/CMakeLists.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libipc/CMakeLists.txt b/src/libipc/CMakeLists.txt
index 7eed20ba..5ec25636 100644
--- a/src/libipc/CMakeLists.txt
+++ b/src/libipc/CMakeLists.txt
@@ -14,9 +14,9 @@ if (LIBIPC_BUILD_SHARED_LIBS)
   add_library(${PROJECT_NAME} SHARED ${SRC_FILES} ${HEAD_FILES})
   target_compile_definitions(${PROJECT_NAME}
     INTERFACE
-      LIBIPC_LIBRARY_SHARED_USING__
+      LIBIMP_LIBRARY_SHARED_USING__
     PRIVATE
-      LIBIPC_LIBRARY_SHARED_BUILDING__)
+      LIBIMP_LIBRARY_SHARED_BUILDING__)
 else()
   add_library(${PROJECT_NAME} STATIC ${SRC_FILES} ${HEAD_FILES})
 endif()

From e4add795084bf5a4a98de10339ee774f6ca540d6 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Fri, 19 Aug 2022 12:10:10 +0800
Subject: [PATCH 059/272] upd: [imp] optimize imp namespace macro

---
 include/libimp/def.h | 1 -
 include/libimp/log.h | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/libimp/def.h b/include/libimp/def.h
index 25535bc7..f95b82d0 100644
--- a/include/libimp/def.h
+++ b/include/libimp/def.h
@@ -10,7 +10,6 @@
 #include <cstdint>
 
 #define LIBIMP_               imp
-#define LIBIMP_NAMESPACE_     :: LIBIMP_
 #define LIBIMP_NAMESPACE_BEG_ namespace LIBIMP_ {
 #define LIBIMP_NAMESPACE_END_ }
 
diff --git a/include/libimp/log.h b/include/libimp/log.h
index 9c6bd99a..a88ed70d 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -171,4 +171,4 @@ class gripper {
 } // namespace log
 LIBIMP_NAMESPACE_END_
 
-#define LIBIMP_LOG_(...) LIBIMP_NAMESPACE_::log::gripper log {__func__, __VA_ARGS__}
\ No newline at end of file
+#define LIBIMP_LOG_(...) ::LIBIMP_::log::gripper log {__func__, __VA_ARGS__}
\ No newline at end of file

From 9e625b603bcc48606bac5b3fb77c9d6736061e6f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 4 Sep 2022 21:57:05 +0800
Subject: [PATCH 060/272] add: [ipc] implementation of memory mapping (TBD)

---
 include/libipc/def.h               |  12 ++-
 include/libipc/mmap.h              |  43 ---------
 include/libipc/shm.h               |  27 ++++++
 src/libimp/platform/posix/system.h |   2 +-
 src/libimp/platform/win/system.h   |   2 +-
 src/libipc/mmap.cpp                |   7 --
 src/libipc/platform/posix/mmap.h   |   6 +-
 src/libipc/platform/win/get_sa.h   |  46 ++++++++++
 src/libipc/platform/win/mmap.h     | 138 +++++++++++++++++++++++++++++
 src/libipc/platform/win/to_tchar.h |  23 +++++
 src/libipc/shm.cpp                 |  12 +++
 test/test_ipc_mmap.cpp             |   7 --
 test/test_ipc_shm.cpp              |   7 ++
 13 files changed, 268 insertions(+), 64 deletions(-)
 delete mode 100644 include/libipc/mmap.h
 delete mode 100644 src/libipc/mmap.cpp
 create mode 100644 src/libipc/platform/win/get_sa.h
 create mode 100644 src/libipc/platform/win/mmap.h
 create mode 100644 src/libipc/platform/win/to_tchar.h
 create mode 100644 src/libipc/shm.cpp
 delete mode 100644 test/test_ipc_mmap.cpp
 create mode 100644 test/test_ipc_shm.cpp

diff --git a/include/libipc/def.h b/include/libipc/def.h
index dd04e076..0561ffe5 100755
--- a/include/libipc/def.h
+++ b/include/libipc/def.h
@@ -10,8 +10,7 @@
 #include <cstdint>
 
 #define LIBIPC_               ipc
-#define LIBIPC_NAMESPACE_     LIBIPC_
-#define LIBIPC_NAMESPACE_BEG_ namespace LIBIPC_NAMESPACE_ {
+#define LIBIPC_NAMESPACE_BEG_ namespace LIBIPC_ {
 #define LIBIPC_NAMESPACE_END_ }
 
 LIBIPC_NAMESPACE_BEG_
@@ -27,4 +26,13 @@ struct prot {
   };
 };
 
+struct mode {
+  using type = std::uint32_t;
+  enum : type {
+    none   = 0x00,
+    create = 0x01,
+    open   = 0x02,
+  };
+};
+
 LIBIPC_NAMESPACE_END_
diff --git a/include/libipc/mmap.h b/include/libipc/mmap.h
deleted file mode 100644
index 2f9e921c..00000000
--- a/include/libipc/mmap.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/**
- * @file libipc/mmap.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define the methods of memory-mapped file I/O
- * @date 2022-04-17
- */
-#pragma once
-
-#include <string>
-#include <cstddef>
-
-#include "libimp/export.h"
-#include "libimp/result.h"
-
-#include "libipc/def.h"
-
-LIBIPC_NAMESPACE_BEG_
-
-struct mmap_handle;
-using mmap_t = mmap_handle *;
-
-/**
- * @brief Creates a new mapping in the virtual address space of the calling process.
- */
-LIBIMP_EXPORT ::LIBIMP_::result<mmap_t> mmap_open(std::string const &file, 
-                                                  std::size_t size = 0,
-                                                  prot::type = prot::read | prot::write) noexcept;
-
-/**
- * @brief Close the memory mapping handle.
- */
-LIBIMP_EXPORT ::LIBIMP_::result_code mmap_close(mmap_t) noexcept;
-
-/**
- * @brief Synchronize a file with a memory map.
- */
-LIBIMP_EXPORT ::LIBIMP_::result_code mmap_sync(mmap_t) noexcept;
-
-LIBIMP_EXPORT void *      mmap_get (mmap_t) noexcept;
-LIBIMP_EXPORT std::size_t mmap_size(mmap_t) noexcept;
-LIBIMP_EXPORT std::string mmap_file(mmap_t) noexcept;
-
-LIBIPC_NAMESPACE_END_
diff --git a/include/libipc/shm.h b/include/libipc/shm.h
index b2ed5196..c7e697db 100644
--- a/include/libipc/shm.h
+++ b/include/libipc/shm.h
@@ -6,10 +6,37 @@
  */
 #pragma once
 
+#include <string>
+#include <cstddef>
+
+#include "libimp/export.h"
+#include "libimp/result.h"
+
 #include "libipc/def.h"
 
 LIBIPC_NAMESPACE_BEG_
 
+struct shm_handle;
+using shm_t = shm_handle *;
+
+/// @brief Create a new shared memory handle with a name of the shared memory file.
+LIBIMP_EXPORT ::LIBIMP_::result<shm_t> shm_open(std::string name, 
+                                                std::size_t size = 0,
+                                                mode::type = mode::create | mode::open) noexcept;
+
+/// @brief Close the shared memory handle.
+LIBIMP_EXPORT ::LIBIMP_::result_code shm_close(shm_t) noexcept;
+
+/// @brief Gets a memory pointer based on the shared memory handle.
+/// @return nullptr on failure.
+LIBIMP_EXPORT void *shm_get(shm_t) noexcept;
+
+/// @brief Gets the memory size based on the shared memory handle.
+/// @return 0 on failure.
+LIBIMP_EXPORT std::size_t shm_size(shm_t) noexcept;
 
+/// @brief Gets the name of the shared memory file based on the shared memory handle.
+/// @return empty string on failure.
+LIBIMP_EXPORT std::string shm_file(shm_t) noexcept;
 
 LIBIPC_NAMESPACE_END_
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index a786ab46..3f5f33d5 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -42,7 +42,7 @@ std::string error_str(result_code code) noexcept {
 #if ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE)
   LIBIMP_LOG_();
   if (::strerror_r((int)code.value(), msg_buf, sizeof(msg_buf)) != 0) {
-    log.error("strerror_r fails. return = {}", error_code());
+    log.error("strerror_r fails. error = {}", error_code());
     return {};
   }
   return msg_buf;
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index d412a651..9fac9393 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -56,7 +56,7 @@ std::string error_str(result_code code) noexcept {
           MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
           (LPTSTR)&lpErrText,
           0, NULL) == 0) {
-      log.error("FormatMessage fails. return = {}", error_code());
+      log.error("FormatMessage fails. error = {}", error_code());
       return {};
     }
     LIBIMP_UNUSED auto buf_guard = std::unique_ptr<std::remove_pointer_t<LPVOID>, 
diff --git a/src/libipc/mmap.cpp b/src/libipc/mmap.cpp
deleted file mode 100644
index 06fb539b..00000000
--- a/src/libipc/mmap.cpp
+++ /dev/null
@@ -1,7 +0,0 @@
-#include "libipc/mmap.h"
-
-LIBIPC_NAMESPACE_BEG_
-
-
-
-LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/posix/mmap.h b/src/libipc/platform/posix/mmap.h
index 8aef07bf..b2991fc7 100644
--- a/src/libipc/platform/posix/mmap.h
+++ b/src/libipc/platform/posix/mmap.h
@@ -1,5 +1,5 @@
 /**
- * @file libimp/platform/posix/mmap.h
+ * @file libipc/platform/posix/mmap.h
  * @author mutouyun (orz@orzz.org)
  */
 #pragma once
@@ -7,7 +7,7 @@
 #include <string>
 #include <cstddef>
 
-#include "libipc/mmap.h"
+#include "libipc/shm.h"
 
 LIBIPC_NAMESPACE_BEG_
 
@@ -18,7 +18,7 @@ struct mmap_handle {
   void *memp;
 };
 
-inline int mmap_open_(mmap_t *h_out, std::string const &file, int fd, int flags, std::size_t f_sz, std::size_t f_of) noexcept {
+inline int mmap_open_(mmap_handle *h_out, std::string const &file, int fd, int flags, std::size_t f_sz, std::size_t f_of) noexcept {
   if (h_out == nullptr) {
     return -1;
   }
diff --git a/src/libipc/platform/win/get_sa.h b/src/libipc/platform/win/get_sa.h
new file mode 100644
index 00000000..9965dd17
--- /dev/null
+++ b/src/libipc/platform/win/get_sa.h
@@ -0,0 +1,46 @@
+#pragma once
+
+#include <securitybaseapi.h>
+
+#include "libimp/system.h"
+#include "libimp/log.h"
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+namespace detail {
+
+/**
+ * @brief Create a SECURITY_ATTRIBUTES structure singleton
+ * @see https://docs.microsoft.com/en-us/previous-versions/windows/desktop/legacy/aa379560(v=vs.85)
+ */
+inline LPSECURITY_ATTRIBUTES get_sa() {
+  static struct initiator {
+
+    SECURITY_DESCRIPTOR sd_;
+    SECURITY_ATTRIBUTES sa_;
+
+    bool succ_ = false;
+
+    initiator() {
+      using namespace ::LIBIMP_;
+      log::gripper log {"get_sa"};
+      if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
+        log.error("InitializeSecurityDescriptor fails. error = {}", sys::error_msg(sys::error_code()));
+        return;
+      }
+      if (!::SetSecurityDescriptorDacl(&sd_, TRUE, NULL, FALSE)) {
+        log.error("SetSecurityDescriptorDacl fails. error = {}", sys::error_msg(sys::error_code()));
+        return;
+      }
+      sa_.nLength = sizeof(SECURITY_ATTRIBUTES);
+      sa_.bInheritHandle = FALSE;
+      sa_.lpSecurityDescriptor = &sd_;
+      succ_ = true;
+    }
+  } handle;
+  return handle.succ_ ? &handle.sa_ : nullptr;
+}
+
+} // namespace detail
+LIBIPC_NAMESPACE_END_
\ No newline at end of file
diff --git a/src/libipc/platform/win/mmap.h b/src/libipc/platform/win/mmap.h
new file mode 100644
index 00000000..92b4d9b9
--- /dev/null
+++ b/src/libipc/platform/win/mmap.h
@@ -0,0 +1,138 @@
+/**
+ * @file libipc/platform/win/mmap.h
+ * @author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <string>
+#include <cstddef>
+
+#include <Windows.h>
+
+#include "libimp/log.h"
+#include "libimp/system.h"
+
+#include "libipc/shm.h"
+
+#include "get_sa.h"
+#include "to_tchar.h"
+
+LIBIPC_NAMESPACE_BEG_
+using namespace ::LIBIMP_;
+
+struct shm_handle {
+  std::string file;
+  std::size_t f_sz;
+  void *memp;
+  HANDLE h_fmap;
+};
+
+namespace {
+
+void mmap_close(HANDLE h) {
+  LIBIMP_LOG_();
+  if (h == NULL) {
+    log.error("handle is null.");
+    return;
+  }
+  /// @brief Closes an open object handle.
+  /// @see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
+  if (!::CloseHandle(h)) {
+    log.error("CloseHandle fails. error = {}", sys::error_msg(sys::error_code()));
+  }
+}
+
+HANDLE mmap_open(std::string file, std::size_t size, mode::type type) noexcept {
+  LIBIMP_LOG_();
+  if (file.empty()) {
+    log.error("file name is empty.");
+    return NULL;
+  }
+  auto t_name = detail::to_tstring(file);
+  if (t_name.empty()) {
+    log.error("file name is empty. (TCHAR conversion failed)");
+    return NULL;
+  }
+  /// @brief Opens a named file mapping object.
+  /// @see https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-openfilemappinga
+  if (type == mode::open) {
+    HANDLE h = ::OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, t_name.c_str());
+    if (h == NULL) {
+      log.error("OpenFileMapping fails. error = {}", sys::error_msg(sys::error_code()));
+    }
+    return h;
+  }
+  /// @brief Creates or opens a named or unnamed file mapping object for a specified file.
+  /// @see https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-createfilemappinga
+  HANDLE h = ::CreateFileMapping(INVALID_HANDLE_VALUE, detail::get_sa(), PAGE_READWRITE | SEC_COMMIT,
+                                 0, static_cast<DWORD>(size), t_name.c_str());
+  if (h == NULL) {
+    log.error("CreateFileMapping fails. error = {}", sys::error_msg(sys::error_code()));
+    return NULL;
+  }
+  // If the object exists before the function call, the function returns a handle to the existing object
+  // (with its current size, not the specified size), and GetLastError returns ERROR_ALREADY_EXISTS.
+  if ((type == mode::create) && (::GetLastError() == ERROR_ALREADY_EXISTS)) {
+    mmap_close(h);
+    return NULL;
+  }
+  return h;
+}
+
+LPVOID mmap_memof(HANDLE h) {
+  LIBIMP_LOG_();
+  if (h == NULL) {
+    log.error("handle is null.");
+    return NULL;
+  }
+  /// @brief Maps a view of a file mapping into the address space of a calling process.
+  /// @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-mapviewoffile
+  LPVOID mem = ::MapViewOfFile(h, FILE_MAP_ALL_ACCESS, 0, 0, 0);
+  if (h == NULL) {
+    log.error("MapViewOfFile fails. error = {}", sys::error_msg(sys::error_code()));
+    return NULL;
+  }
+  return mem;
+}
+
+SIZE_T mmap_sizeof(LPCVOID mem) {
+  LIBIMP_LOG_();
+  if (mem == NULL) {
+    log.error("memory pointer is null.");
+    return 0;
+  }
+  /// @brief Retrieves information about a range of pages in the virtual address space of the calling process.
+  /// @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-virtualquery
+  MEMORY_BASIC_INFORMATION mem_info {};
+  if (::VirtualQuery(mem, &mem_info, sizeof(mem_info)) == 0) {
+    log.error("VirtualQuery fails. error = {}", sys::error_msg(sys::error_code()));
+    return 0;
+  }
+  return mem_info.RegionSize;
+}
+
+void mmap_release(HANDLE h, LPCVOID mem) {
+  LIBIMP_LOG_();
+  if (h == NULL) {
+    log.error("handle is null.");
+    return;
+  }
+  if (mem == NULL) {
+    log.error("memory pointer is null.");
+    return;
+  }
+  /// @brief Unmaps a mapped view of a file from the calling process's address space.
+  /// @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-unmapviewoffile
+  if (!::UnmapViewOfFile(mem)) {
+    log.warning("UnmapViewOfFile fails. error = {}", sys::error_msg(sys::error_code()));
+  }
+  mmap_close(h);
+}
+
+} // namespace
+
+::LIBIMP_::result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
+  return {};
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/to_tchar.h b/src/libipc/platform/win/to_tchar.h
new file mode 100644
index 00000000..a571c9bb
--- /dev/null
+++ b/src/libipc/platform/win/to_tchar.h
@@ -0,0 +1,23 @@
+#pragma once
+
+#include <tchar.h>
+
+#include <string>
+
+#include "libimp/codecvt.h"
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+namespace detail {
+
+using tstring = std::basic_string<TCHAR>;
+
+inline tstring to_tstring(std::string const &str) {
+  tstring des;
+  ::LIBIMP_::cvt_sstr(str, des);
+  return des;
+}
+
+} // namespace detail
+LIBIPC_NAMESPACE_END_
\ No newline at end of file
diff --git a/src/libipc/shm.cpp b/src/libipc/shm.cpp
new file mode 100644
index 00000000..dad96d92
--- /dev/null
+++ b/src/libipc/shm.cpp
@@ -0,0 +1,12 @@
+#include "libimp/detect_plat.h"
+#if defined(LIBIMP_OS_WIN)
+#include "libipc/platform/win/mmap.h"
+#else
+#include "libipc/platform/posix/mmap.h"
+#endif
+
+LIBIPC_NAMESPACE_BEG_
+
+
+
+LIBIPC_NAMESPACE_END_
diff --git a/test/test_ipc_mmap.cpp b/test/test_ipc_mmap.cpp
deleted file mode 100644
index 40ed6bb3..00000000
--- a/test/test_ipc_mmap.cpp
+++ /dev/null
@@ -1,7 +0,0 @@
-
-#include "gtest/gtest.h"
-
-#include "libipc/mmap.h"
-
-TEST(mmap, create_close) {
-}
\ No newline at end of file
diff --git a/test/test_ipc_shm.cpp b/test/test_ipc_shm.cpp
new file mode 100644
index 00000000..1e5c95f1
--- /dev/null
+++ b/test/test_ipc_shm.cpp
@@ -0,0 +1,7 @@
+
+#include "gtest/gtest.h"
+
+#include "libipc/shm.h"
+
+TEST(shm, create_close) {
+}
\ No newline at end of file

From 9f9b57cb51fe426c4f6ec931e43d92cf135ddbc7 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 17 Sep 2022 21:56:37 +0800
Subject: [PATCH 061/272] upd: update comments

---
 src/libipc/platform/win/mmap.h | 36 ++++++++++++++++++++++++----------
 1 file changed, 26 insertions(+), 10 deletions(-)

diff --git a/src/libipc/platform/win/mmap.h b/src/libipc/platform/win/mmap.h
index 92b4d9b9..2487e897 100644
--- a/src/libipc/platform/win/mmap.h
+++ b/src/libipc/platform/win/mmap.h
@@ -29,19 +29,31 @@ struct shm_handle {
 
 namespace {
 
+/**
+ * @brief Closes an open object handle.
+ * @see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
+ */
 void mmap_close(HANDLE h) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
     return;
   }
-  /// @brief Closes an open object handle.
-  /// @see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
   if (!::CloseHandle(h)) {
     log.error("CloseHandle fails. error = {}", sys::error_msg(sys::error_code()));
   }
 }
 
+/**
+ * @brief Creates or opens a file mapping object for a specified file.
+ * @see https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-openfilemappinga
+ *      https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-createfilemappinga
+ * @param file Specifies the name of the file mapping object
+ * @param size Specifies the size required to create a file mapping object.
+ *             This size is ignored when opening an existing file mapping object
+ * @param type Combinable open modes, create | open
+ * @return File mapping object HANDLE, NULL on error
+ */
 HANDLE mmap_open(std::string file, std::size_t size, mode::type type) noexcept {
   LIBIMP_LOG_();
   if (file.empty()) {
@@ -54,7 +66,6 @@ HANDLE mmap_open(std::string file, std::size_t size, mode::type type) noexcept {
     return NULL;
   }
   /// @brief Opens a named file mapping object.
-  /// @see https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-openfilemappinga
   if (type == mode::open) {
     HANDLE h = ::OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, t_name.c_str());
     if (h == NULL) {
@@ -63,7 +74,6 @@ HANDLE mmap_open(std::string file, std::size_t size, mode::type type) noexcept {
     return h;
   }
   /// @brief Creates or opens a named or unnamed file mapping object for a specified file.
-  /// @see https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-createfilemappinga
   HANDLE h = ::CreateFileMapping(INVALID_HANDLE_VALUE, detail::get_sa(), PAGE_READWRITE | SEC_COMMIT,
                                  0, static_cast<DWORD>(size), t_name.c_str());
   if (h == NULL) {
@@ -79,14 +89,16 @@ HANDLE mmap_open(std::string file, std::size_t size, mode::type type) noexcept {
   return h;
 }
 
+/**
+ * @brief Maps a view of a file mapping into the address space of a calling process.
+ * @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-mapviewoffile
+ */
 LPVOID mmap_memof(HANDLE h) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
     return NULL;
   }
-  /// @brief Maps a view of a file mapping into the address space of a calling process.
-  /// @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-mapviewoffile
   LPVOID mem = ::MapViewOfFile(h, FILE_MAP_ALL_ACCESS, 0, 0, 0);
   if (h == NULL) {
     log.error("MapViewOfFile fails. error = {}", sys::error_msg(sys::error_code()));
@@ -95,14 +107,16 @@ LPVOID mmap_memof(HANDLE h) {
   return mem;
 }
 
+/**
+ * @brief Retrieves the size about a range of pages in the virtual address space of the calling process.
+ * @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-virtualquery
+ */
 SIZE_T mmap_sizeof(LPCVOID mem) {
   LIBIMP_LOG_();
   if (mem == NULL) {
     log.error("memory pointer is null.");
     return 0;
   }
-  /// @brief Retrieves information about a range of pages in the virtual address space of the calling process.
-  /// @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-virtualquery
   MEMORY_BASIC_INFORMATION mem_info {};
   if (::VirtualQuery(mem, &mem_info, sizeof(mem_info)) == 0) {
     log.error("VirtualQuery fails. error = {}", sys::error_msg(sys::error_code()));
@@ -111,6 +125,10 @@ SIZE_T mmap_sizeof(LPCVOID mem) {
   return mem_info.RegionSize;
 }
 
+/**
+ * @brief Unmaps a mapped view of a file from the calling process's address space.
+ * @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-unmapviewoffile
+ */
 void mmap_release(HANDLE h, LPCVOID mem) {
   LIBIMP_LOG_();
   if (h == NULL) {
@@ -121,8 +139,6 @@ void mmap_release(HANDLE h, LPCVOID mem) {
     log.error("memory pointer is null.");
     return;
   }
-  /// @brief Unmaps a mapped view of a file from the calling process's address space.
-  /// @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-unmapviewoffile
   if (!::UnmapViewOfFile(mem)) {
     log.warning("UnmapViewOfFile fails. error = {}", sys::error_msg(sys::error_code()));
   }

From 57d8c7a850bb5c6214f9e207cd52b080affda088 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 18 Sep 2022 17:27:14 +0800
Subject: [PATCH 062/272] add: [ipc] implementation of shm (TBD)

---
 src/libipc/platform/win/mmap.h | 30 ++++++++++++++++++++++++++++--
 src/libipc/shm.cpp             | 31 +++++++++++++++++++++++++++++++
 test/test_ipc_shm.cpp          | 23 +++++++++++++++++++++++
 3 files changed, 82 insertions(+), 2 deletions(-)

diff --git a/src/libipc/platform/win/mmap.h b/src/libipc/platform/win/mmap.h
index 2487e897..b0cf7f55 100644
--- a/src/libipc/platform/win/mmap.h
+++ b/src/libipc/platform/win/mmap.h
@@ -54,7 +54,7 @@ void mmap_close(HANDLE h) {
  * @param type Combinable open modes, create | open
  * @return File mapping object HANDLE, NULL on error
  */
-HANDLE mmap_open(std::string file, std::size_t size, mode::type type) noexcept {
+HANDLE mmap_open(std::string const &file, std::size_t size, mode::type type) noexcept {
   LIBIMP_LOG_();
   if (file.empty()) {
     log.error("file name is empty.");
@@ -72,6 +72,9 @@ HANDLE mmap_open(std::string file, std::size_t size, mode::type type) noexcept {
       log.error("OpenFileMapping fails. error = {}", sys::error_msg(sys::error_code()));
     }
     return h;
+  } else if (!(type & mode::create)) {
+    log.error("mode type is invalid. type = {}", type);
+    return NULL;
   }
   /// @brief Creates or opens a named or unnamed file mapping object for a specified file.
   HANDLE h = ::CreateFileMapping(INVALID_HANDLE_VALUE, detail::get_sa(), PAGE_READWRITE | SEC_COMMIT,
@@ -84,6 +87,7 @@ HANDLE mmap_open(std::string file, std::size_t size, mode::type type) noexcept {
   // (with its current size, not the specified size), and GetLastError returns ERROR_ALREADY_EXISTS.
   if ((type == mode::create) && (::GetLastError() == ERROR_ALREADY_EXISTS)) {
     mmap_close(h);
+    log.info("the file being created already exists. file = {}, type = {}", file, type);
     return NULL;
   }
   return h;
@@ -148,7 +152,29 @@ void mmap_release(HANDLE h, LPCVOID mem) {
 } // namespace
 
 ::LIBIMP_::result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
-  return {};
+  LIBIMP_LOG_();
+  auto h = mmap_open(name, size, type);
+  if (h == NULL) {
+    log.error("mmap_open failed.");
+    return {nullptr, *sys::error_code()};
+  }
+  auto mem = mmap_memof(h);
+  if (mem == NULL) {
+    log.warning("mmap_memof failed.");
+  }
+  return new shm_handle{std::move(name), mmap_sizeof(mem), mem, h};
+}
+
+::LIBIMP_::result_code shm_close(shm_t h) noexcept {
+  LIBIMP_LOG_();
+  if (h == nullptr) {
+    log.error("shm handle is null.");
+    return {};
+  }
+  auto shm = static_cast<shm_handle *>(h);
+  mmap_release(shm->h_fmap, shm->memp);
+  delete shm;
+  return {true};
 }
 
 LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/shm.cpp b/src/libipc/shm.cpp
index dad96d92..9522e7c7 100644
--- a/src/libipc/shm.cpp
+++ b/src/libipc/shm.cpp
@@ -1,3 +1,6 @@
+
+#include "libimp/log.h"
+
 #include "libimp/detect_plat.h"
 #if defined(LIBIMP_OS_WIN)
 #include "libipc/platform/win/mmap.h"
@@ -7,6 +10,34 @@
 
 LIBIPC_NAMESPACE_BEG_
 
+void *shm_get(shm_t h) noexcept {
+  LIBIMP_LOG_();
+  if (h == nullptr) {
+    log.error("shm handle is null.");
+    return {};
+  }
+  auto shm = static_cast<shm_handle *>(h);
+  return shm->memp;
+}
+
+std::size_t shm_size(shm_t h) noexcept {
+  LIBIMP_LOG_();
+  if (h == nullptr) {
+    log.error("shm handle is null.");
+    return {};
+  }
+  auto shm = static_cast<shm_handle *>(h);
+  return shm->f_sz;
+}
 
+std::string shm_file(shm_t h) noexcept {
+  LIBIMP_LOG_();
+  if (h == nullptr) {
+    log.error("shm handle is null.");
+    return {};
+  }
+  auto shm = static_cast<shm_handle *>(h);
+  return shm->file;
+}
 
 LIBIPC_NAMESPACE_END_
diff --git a/test/test_ipc_shm.cpp b/test/test_ipc_shm.cpp
index 1e5c95f1..2495cb42 100644
--- a/test/test_ipc_shm.cpp
+++ b/test/test_ipc_shm.cpp
@@ -4,4 +4,27 @@
 #include "libipc/shm.h"
 
 TEST(shm, create_close) {
+  EXPECT_FALSE(ipc::shm_open("hello-ipc-shm", 1024, ipc::mode::none));
+
+  auto shm1 = ipc::shm_open("hello-ipc-shm", 1024, ipc::mode::create | ipc::mode::open);
+  EXPECT_TRUE(shm1);
+  EXPECT_FALSE(ipc::shm_open("hello-ipc-shm", 1024, ipc::mode::create));
+
+  auto pt1 = ipc::shm_get(*shm1);
+  EXPECT_TRUE(ipc::shm_size(*shm1) >= 1024);
+  EXPECT_NE(pt1, nullptr);
+  *(int *)pt1 = 0;
+
+  auto shm2 = ipc::shm_open("hello-ipc-shm", 0, ipc::mode::open);
+  EXPECT_TRUE(shm2);
+  EXPECT_EQ(ipc::shm_size(*shm1), ipc::shm_size(*shm2));
+  auto pt2 = ipc::shm_get(*shm1);
+  EXPECT_NE(pt2, nullptr);
+  EXPECT_EQ(*(int *)pt2, 0);
+  *(int *)pt1 = 1234;
+  EXPECT_EQ(*(int *)pt2, 1234);
+
+  EXPECT_TRUE(ipc::shm_close(*shm2));
+  EXPECT_TRUE(ipc::shm_close(*shm1));
+  EXPECT_FALSE(ipc::shm_close(nullptr));
 }
\ No newline at end of file

From daa63049fe56ed5756b49c698d1822e65b66409d Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 15 Oct 2022 14:19:47 +0800
Subject: [PATCH 063/272] upd: [test] ut

---
 test/test_ipc_shm.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/test_ipc_shm.cpp b/test/test_ipc_shm.cpp
index 2495cb42..830b10c2 100644
--- a/test/test_ipc_shm.cpp
+++ b/test/test_ipc_shm.cpp
@@ -15,7 +15,7 @@ TEST(shm, create_close) {
   EXPECT_NE(pt1, nullptr);
   *(int *)pt1 = 0;
 
-  auto shm2 = ipc::shm_open("hello-ipc-shm", 0, ipc::mode::open);
+  auto shm2 = ipc::shm_open(ipc::shm_file(*shm1), 0, ipc::mode::open);
   EXPECT_TRUE(shm2);
   EXPECT_EQ(ipc::shm_size(*shm1), ipc::shm_size(*shm2));
   auto pt2 = ipc::shm_get(*shm1);

From 985ef22f64dd65da4dbeebccf23236fe59e380e2 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 15 Oct 2022 15:33:47 +0800
Subject: [PATCH 064/272] add: [ipc] implementation of shm

---
 src/libipc/platform/posix/def.h               |  17 +++
 src/libipc/platform/posix/mmap.h              |  27 ----
 src/libipc/platform/posix/shm_impl.h          | 125 ++++++++++++++++++
 src/libipc/platform/win/get_sa.h              |   4 +
 .../platform/win/{mmap.h => mmap_impl.h}      |  29 +---
 src/libipc/platform/win/shm_impl.h            |  46 +++++++
 src/libipc/platform/win/to_tchar.h            |   4 +
 src/libipc/shm.cpp                            |   4 +-
 8 files changed, 199 insertions(+), 57 deletions(-)
 create mode 100644 src/libipc/platform/posix/def.h
 delete mode 100644 src/libipc/platform/posix/mmap.h
 create mode 100644 src/libipc/platform/posix/shm_impl.h
 rename src/libipc/platform/win/{mmap.h => mmap_impl.h} (86%)
 create mode 100644 src/libipc/platform/win/shm_impl.h

diff --git a/src/libipc/platform/posix/def.h b/src/libipc/platform/posix/def.h
new file mode 100644
index 00000000..10329357
--- /dev/null
+++ b/src/libipc/platform/posix/def.h
@@ -0,0 +1,17 @@
+/**
+ * @file libipc/platform/posix/mmap.h
+ * @author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+namespace posix {
+
+enum : int {
+  failed = -1,
+};
+
+} // namespace posix
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/posix/mmap.h b/src/libipc/platform/posix/mmap.h
deleted file mode 100644
index b2991fc7..00000000
--- a/src/libipc/platform/posix/mmap.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/**
- * @file libipc/platform/posix/mmap.h
- * @author mutouyun (orz@orzz.org)
- */
-#pragma once
-
-#include <string>
-#include <cstddef>
-
-#include "libipc/shm.h"
-
-LIBIPC_NAMESPACE_BEG_
-
-struct mmap_handle {
-  std::string file;
-  std::size_t f_sz;
-  std::size_t f_of;
-  void *memp;
-};
-
-inline int mmap_open_(mmap_handle *h_out, std::string const &file, int fd, int flags, std::size_t f_sz, std::size_t f_of) noexcept {
-  if (h_out == nullptr) {
-    return -1;
-  }
-}
-
-LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
new file mode 100644
index 00000000..d7bb2eac
--- /dev/null
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -0,0 +1,125 @@
+/**
+ * @file libipc/platform/posix/shm_impl.h
+ * @author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <string>
+#include <cstddef>
+
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "libimp/log.h"
+#include "libimp/system.h"
+
+#include "libipc/shm.h"
+
+#include "def.h"
+
+LIBIPC_NAMESPACE_BEG_
+using namespace ::LIBIMP_;
+
+struct shm_handle {
+  std::string file;
+  std::size_t f_sz;
+  void *memp;
+};
+
+/**
+ * @see https://man7.org/linux/man-pages/man3/shm_open.3.html
+ *      https://man7.org/linux/man-pages/man3/fstat.3p.html
+ *      https://man7.org/linux/man-pages/man3/ftruncate.3p.html
+ *      https://man7.org/linux/man-pages/man2/mmap.2.html
+ */
+result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
+  LIBIMP_LOG_();
+  if (name.empty()) {
+    log.error("name is empty.");
+    return {};
+  }
+
+  /// @brief Open the object for read-write access.
+  int flag = O_RDWR;
+  switch (type) {
+  case mode::open:
+    size = 0;
+    break;
+  // The check for the existence of the object, 
+  // and its creation if it does not exist, are performed atomically.
+  case mode::create:
+    flag |= O_CREAT | O_EXCL;
+    break;
+  // Create the shared memory object if it does not exist.
+  case mode::open | mode::create:
+    flag |= O_CREAT;
+    break;
+  default:
+    log.error("mode type is invalid. type = {}", type);
+    return {};
+  }
+
+  /// @brief Create/Open POSIX shared memory bject
+  int fd = ::shm_open(name.c_str(), flag, S_IRUSR | S_IWUSR |
+                                          S_IRGRP | S_IWGRP |
+                                          S_IROTH | S_IWOTH);
+  if (fd == posix::failed) {
+    log.error("shm_open fails. error = {}", sys::error_msg(sys::error_code()));
+    return {};
+  }
+
+  if (size == 0) {
+    /// @brief Try to get the size of this fd
+    struct stat st;
+    if (::fstat(fd, &st) == posix::failed) {
+      log.error("fstat fails. error = {}", sys::error_msg(sys::error_code()));
+      ::shm_unlink(name.c_str());
+      return {};
+    }
+    size = static_cast<std::size_t>(st.st_size);
+    /// @brief Truncate this fd to a specified length
+  } else if (::ftruncate(fd, size) != 0) {
+    log.error("ftruncate fails. error = {}", sys::error_msg(sys::error_code()));
+    ::shm_unlink(name.c_str());
+    return {};
+  }
+
+  /// @brief Creates a new mapping in the virtual address space of the calling process.
+  void *mem = ::mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+  if (mem == MAP_FAILED) {
+    log.error("mmap fails. error = {}", sys::error_msg(sys::error_code()));
+    ::shm_unlink(name.c_str());
+    return {};
+  }
+  ::close(fd);
+  return new shm_handle{std::move(name), size, mem};
+}
+
+/**
+ * @see https://man7.org/linux/man-pages/man2/mmap.2.html
+ */
+result_code shm_close(shm_t h) noexcept {
+  LIBIMP_LOG_();
+  if (h == nullptr) {
+    log.error("shm handle is null.");
+    return {};
+  }
+  auto shm = static_cast<shm_handle *>(h);
+  if (shm->memp == nullptr) {
+    log.error("memory pointer is null.");
+    return {};
+  }
+  if (::munmap(shm->memp, shm->f_sz) == posix::failed) {
+    auto ec = sys::error_code();
+    log.error("munmap fails. error = {}", sys::error_msg(ec));
+    return ec;
+  }
+  /// @brief no unlink the file.
+  delete shm;
+  return {true};
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/get_sa.h b/src/libipc/platform/win/get_sa.h
index 9965dd17..faea281e 100644
--- a/src/libipc/platform/win/get_sa.h
+++ b/src/libipc/platform/win/get_sa.h
@@ -1,3 +1,7 @@
+/**
+ * @file libipc/platform/win/get_sa.h
+ * @author mutouyun (orz@orzz.org)
+ */
 #pragma once
 
 #include <securitybaseapi.h>
diff --git a/src/libipc/platform/win/mmap.h b/src/libipc/platform/win/mmap_impl.h
similarity index 86%
rename from src/libipc/platform/win/mmap.h
rename to src/libipc/platform/win/mmap_impl.h
index b0cf7f55..494532ca 100644
--- a/src/libipc/platform/win/mmap.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -1,5 +1,5 @@
 /**
- * @file libipc/platform/win/mmap.h
+ * @file libipc/platform/win/mmap_impl.h
  * @author mutouyun (orz@orzz.org)
  */
 #pragma once
@@ -150,31 +150,4 @@ void mmap_release(HANDLE h, LPCVOID mem) {
 }
 
 } // namespace
-
-::LIBIMP_::result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
-  LIBIMP_LOG_();
-  auto h = mmap_open(name, size, type);
-  if (h == NULL) {
-    log.error("mmap_open failed.");
-    return {nullptr, *sys::error_code()};
-  }
-  auto mem = mmap_memof(h);
-  if (mem == NULL) {
-    log.warning("mmap_memof failed.");
-  }
-  return new shm_handle{std::move(name), mmap_sizeof(mem), mem, h};
-}
-
-::LIBIMP_::result_code shm_close(shm_t h) noexcept {
-  LIBIMP_LOG_();
-  if (h == nullptr) {
-    log.error("shm handle is null.");
-    return {};
-  }
-  auto shm = static_cast<shm_handle *>(h);
-  mmap_release(shm->h_fmap, shm->memp);
-  delete shm;
-  return {true};
-}
-
 LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
new file mode 100644
index 00000000..0df9a8f1
--- /dev/null
+++ b/src/libipc/platform/win/shm_impl.h
@@ -0,0 +1,46 @@
+/**
+ * @file libipc/platform/win/shm_impl.h
+ * @author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <string>
+#include <cstddef>
+
+#include "libimp/log.h"
+#include "libimp/system.h"
+
+#include "libipc/shm.h"
+
+#include "mmap_impl.h"
+
+LIBIPC_NAMESPACE_BEG_
+using namespace ::LIBIMP_;
+
+result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
+  LIBIMP_LOG_();
+  auto h = mmap_open(name, size, type);
+  if (h == NULL) {
+    log.error("mmap_open failed.");
+    return {nullptr, *sys::error_code()};
+  }
+  auto mem = mmap_memof(h);
+  if (mem == NULL) {
+    log.warning("mmap_memof failed.");
+  }
+  return new shm_handle{std::move(name), mmap_sizeof(mem), mem, h};
+}
+
+result_code shm_close(shm_t h) noexcept {
+  LIBIMP_LOG_();
+  if (h == nullptr) {
+    log.error("shm handle is null.");
+    return {};
+  }
+  auto shm = static_cast<shm_handle *>(h);
+  mmap_release(shm->h_fmap, shm->memp);
+  delete shm;
+  return {true};
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/to_tchar.h b/src/libipc/platform/win/to_tchar.h
index a571c9bb..4f1d9425 100644
--- a/src/libipc/platform/win/to_tchar.h
+++ b/src/libipc/platform/win/to_tchar.h
@@ -1,3 +1,7 @@
+/**
+ * @file libipc/platform/win/to_tchar.h
+ * @author mutouyun (orz@orzz.org)
+ */
 #pragma once
 
 #include <tchar.h>
diff --git a/src/libipc/shm.cpp b/src/libipc/shm.cpp
index 9522e7c7..da15fb5c 100644
--- a/src/libipc/shm.cpp
+++ b/src/libipc/shm.cpp
@@ -3,9 +3,9 @@
 
 #include "libimp/detect_plat.h"
 #if defined(LIBIMP_OS_WIN)
-#include "libipc/platform/win/mmap.h"
+#include "libipc/platform/win/shm_impl.h"
 #else
-#include "libipc/platform/posix/mmap.h"
+#include "libipc/platform/posix/shm_impl.h"
 #endif
 
 LIBIPC_NAMESPACE_BEG_

From 4e4f22e3a848c8af71a0147790b2cde6aced489a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 15 Oct 2022 18:39:36 +0800
Subject: [PATCH 065/272] upd: [ipc] spin lock

---
 include/libipc/spin_lock.h | 127 +++++--------------------------------
 src/libipc/spin_lock.cpp   | 116 +++++++++++++++++++++++++++++++++
 2 files changed, 132 insertions(+), 111 deletions(-)
 create mode 100644 src/libipc/spin_lock.cpp

diff --git a/include/libipc/spin_lock.h b/include/libipc/spin_lock.h
index 7f318895..9ae55bf9 100644
--- a/include/libipc/spin_lock.h
+++ b/include/libipc/spin_lock.h
@@ -9,59 +9,18 @@
 #include <atomic>
 #include <thread>
 #include <chrono>
-#include <limits>
-#include <type_traits>
 #include <utility>
 
-#include "libimp/detect_plat.h"
-#include "libipc/def.h"
-
-/**
- * @brief Gives hint to processor that improves performance of spin-wait loops.
-*/
+#include "libimp/export.h"
 
-#pragma push_macro("LIBIPC_LOCK_PAUSE_")
-#undef LIBIPC_LOCK_PAUSE_
+#include "libipc/def.h"
 
-#if defined(LIBIPC_CC_MSVC)
-# include <Windows.h>   // YieldProcessor
-/**
- * @brief Not for intel c++ compiler, so ignore http://software.intel.com/en-us/forums/topic/296168
- * @see http://msdn.microsoft.com/en-us/library/windows/desktop/ms687419(v=vs.85).aspx
-*/
-# define LIBIPC_LOCK_PAUSE_() YieldProcessor()
-#elif defined(LIBIPC_CC_GNUC)
-# if defined(LIBIPC_INSTR_X86_64)
-/**
- * @brief Intel(R) 64 and IA-32 Architectures Software Developer's Manual V2
- *        PAUSE-Spin Loop Hint, 4-57
- * @see http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.html?wapkw=instruction+set+reference
-*/
-#   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__("pause")
-# elif defined(LIBIPC_INSTR_I64)
-/**
- * @brief Intel(R) Itanium(R) Architecture Developer's Manual, Vol.3
- *        hint - Performance Hint, 3:145
- * @see http://www.intel.com/content/www/us/en/processors/itanium/itanium-architecture-vol-3-manual.html
-*/
-#   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__ ("hint @pause")
-# elif defined(LIBIPC_INSTR_ARM)
-/**
- * @brief ARM Architecture Reference Manuals (YIELD)
- * @see http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html
-*/
-#   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__ ("yield")
-# endif
-#endif /*compilers*/
+LIBIPC_NAMESPACE_BEG_
 
-#if !defined(LIBIPC_LOCK_PAUSE_)
 /**
- * @brief Just use a compiler fence, prevent compiler from optimizing loop
+ * @brief Gives hint to processor that improves performance of spin-wait loops.
 */
-# define LIBIPC_LOCK_PAUSE_() std::atomic_signal_fence(std::memory_order_seq_cst)
-#endif /*!defined(LIBIPC_LOCK_PAUSE_)*/
-
-LIBIPC_NAMESPACE_BEG_
+LIBIMP_EXPORT void pause() noexcept;
 
 /**
  * @brief Yield to other threads
@@ -71,7 +30,7 @@ template <typename K>
 inline void yield(K &k) noexcept {
   if (k < 4)  { /* Do nothing */ }
   else
-  if (k < 16) { LIBIPC_LOCK_PAUSE_(); }
+  if (k < 16) { pause(); }
   else
   if (k < 32) { std::this_thread::yield(); }
   else {
@@ -96,86 +55,32 @@ inline void sleep(K &k, F &&f) {
 template <std::size_t N = 32, typename K>
 inline void sleep(K &k) {
   sleep<N>(k, [] {
-    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+    std::this_thread::sleep_for(std::chrono::microseconds(1));
   });
 }
 
 /**
  * @brief Basic spin lock
 */
-class spin_lock {
+class LIBIMP_EXPORT spin_lock {
   std::atomic<unsigned> lc_ {0};
 
 public:
-  void lock(void) noexcept {
-    for (unsigned k = 0;
-         lc_.exchange(1, std::memory_order_acquire);
-         yield(k)) ;
-  }
-  void unlock(void) noexcept {
-    lc_.store(0, std::memory_order_release);
-  }
+  void lock() noexcept;
+  void unlock() noexcept;
 };
 
 /**
  * @brief Support for shared mode spin lock
 */
-class rw_lock {
-  using lc_ui_t = unsigned;
-
-  std::atomic<lc_ui_t> lc_ {0};
-
-  enum : lc_ui_t {
-    w_mask = (std::numeric_limits<std::make_signed_t<lc_ui_t>>::max)(), // b 0111 1111
-    w_flag = w_mask + 1,                                                // b 1000 0000
-  };
+class LIBIMP_EXPORT rw_lock {
+  std::atomic<unsigned> lc_ {0};
 
 public:
-  rw_lock() noexcept = default;
-
-  rw_lock(const rw_lock &) = delete;
-  rw_lock &operator=(const rw_lock &) = delete;
-  rw_lock(rw_lock &&) = delete;
-  rw_lock &operator=(rw_lock &&) = delete;
-
-  void lock() noexcept {
-    for (unsigned k = 0;;) {
-      auto old = lc_.fetch_or(w_flag, std::memory_order_acq_rel);
-      if (!old) return;           // got w-lock
-      if (!(old & w_flag)) break; // other thread having r-lock
-      yield(k);                   // other thread having w-lock
-    }
-    // wait for reading finished
-    for (unsigned k = 0;
-         lc_.load(std::memory_order_acquire) & w_mask;
-         yield(k)) ;
-  }
-
-  void unlock() noexcept {
-    lc_.store(0, std::memory_order_release);
-  }
-
-  void lock_shared() noexcept {
-    auto old = lc_.load(std::memory_order_acquire);
-    for (unsigned k = 0;;) {
-      // if w_flag set, just continue
-      if (old & w_flag) {
-        yield(k);
-        old = lc_.load(std::memory_order_acquire);
-      }
-      // otherwise try cas lc + 1 (set r-lock)
-      else if (lc_.compare_exchange_weak(old, old + 1, std::memory_order_release)) {
-        return;
-      }
-      // set r-lock failed, old has been updated
-    }
-  }
-
-  void unlock_shared() noexcept {
-    lc_.fetch_sub(1, std::memory_order_release);
-  }
+  void lock() noexcept;
+  void unlock() noexcept;
+  void lock_shared() noexcept;
+  void unlock_shared() noexcept;
 };
 
 LIBIPC_NAMESPACE_END_
-
-#pragma pop_macro("LIBIPC_LOCK_PAUSE_")
diff --git a/src/libipc/spin_lock.cpp b/src/libipc/spin_lock.cpp
new file mode 100644
index 00000000..7cb7b7ec
--- /dev/null
+++ b/src/libipc/spin_lock.cpp
@@ -0,0 +1,116 @@
+
+#include <limits>
+
+#include "libimp/detect_plat.h"
+
+#include "libipc/spin_lock.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+#if defined(LIBIPC_CC_MSVC)
+# include <Windows.h>   // YieldProcessor
+/**
+ * @brief Not for intel c++ compiler, so ignore http://software.intel.com/en-us/forums/topic/296168
+ * @see http://msdn.microsoft.com/en-us/library/windows/desktop/ms687419(v=vs.85).aspx
+*/
+# define LIBIPC_LOCK_PAUSE_() YieldProcessor()
+#elif defined(LIBIPC_CC_GNUC)
+# if defined(LIBIPC_INSTR_X86_64)
+/**
+ * @brief Intel(R) 64 and IA-32 Architectures Software Developer's Manual V2
+ *        PAUSE-Spin Loop Hint, 4-57
+ * @see http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.html?wapkw=instruction+set+reference
+*/
+#   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__("pause")
+# elif defined(LIBIPC_INSTR_I64)
+/**
+ * @brief Intel(R) Itanium(R) Architecture Developer's Manual, Vol.3
+ *        hint - Performance Hint, 3:145
+ * @see http://www.intel.com/content/www/us/en/processors/itanium/itanium-architecture-vol-3-manual.html
+*/
+#   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__ ("hint @pause")
+# elif defined(LIBIPC_INSTR_ARM)
+/**
+ * @brief ARM Architecture Reference Manuals (YIELD)
+ * @see http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html
+*/
+#   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__ ("yield")
+# endif
+#endif /*compilers*/
+
+#if !defined(LIBIPC_LOCK_PAUSE_)
+/**
+ * @brief Just use a compiler fence, prevent compiler from optimizing loop
+*/
+# define LIBIPC_LOCK_PAUSE_() std::atomic_signal_fence(std::memory_order_seq_cst)
+#endif /*!defined(LIBIPC_LOCK_PAUSE_)*/
+
+/**
+ * @brief Gives hint to processor that improves performance of spin-wait loops.
+*/
+void pause() noexcept {
+  LIBIPC_LOCK_PAUSE_();
+}
+
+/**
+ * @brief Basic spin lock
+*/
+
+void spin_lock::lock() noexcept {
+  for (unsigned k = 0;
+        lc_.exchange(1, std::memory_order_acquire);
+        yield(k)) ;
+}
+
+void spin_lock::unlock() noexcept {
+  lc_.store(0, std::memory_order_release);
+}
+
+/// @brief Constants for shared mode spin lock
+enum : unsigned {
+  w_mask = (std::numeric_limits<std::make_signed_t<unsigned>>::max)(), // b 0111 1111
+  w_flag = w_mask + 1,                                                 // b 1000 0000
+};
+
+/**
+ * @brief Support for shared mode spin lock
+*/
+
+void rw_lock::lock() noexcept {
+  for (unsigned k = 0;;) {
+    auto old = lc_.fetch_or(w_flag, std::memory_order_acq_rel);
+    if (!old) return;           // got w-lock
+    if (!(old & w_flag)) break; // other thread having r-lock
+    yield(k);                   // other thread having w-lock
+  }
+  // wait for reading finished
+  for (unsigned k = 0;
+        lc_.load(std::memory_order_acquire) & w_mask;
+        yield(k)) ;
+}
+
+void rw_lock::unlock() noexcept {
+  lc_.store(0, std::memory_order_release);
+}
+
+void rw_lock::lock_shared() noexcept {
+  auto old = lc_.load(std::memory_order_acquire);
+  for (unsigned k = 0;;) {
+    // if w_flag set, just continue
+    if (old & w_flag) {
+      yield(k);
+      old = lc_.load(std::memory_order_acquire);
+    }
+    // otherwise try cas lc + 1 (set r-lock)
+    else if (lc_.compare_exchange_weak(old, old + 1, std::memory_order_release)) {
+      return;
+    }
+    // set r-lock failed, old has been updated
+  }
+}
+
+void rw_lock::unlock_shared() noexcept {
+  lc_.fetch_sub(1, std::memory_order_release);
+}
+
+LIBIPC_NAMESPACE_END_

From e91abf7af5bd2365b94a3637ce0bc901e90bb02f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 15 Oct 2022 18:45:22 +0800
Subject: [PATCH 066/272] upd: [ipc] pause

---
 src/libipc/spin_lock.cpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/libipc/spin_lock.cpp b/src/libipc/spin_lock.cpp
index 7cb7b7ec..0861c1a2 100644
--- a/src/libipc/spin_lock.cpp
+++ b/src/libipc/spin_lock.cpp
@@ -7,29 +7,29 @@
 
 LIBIPC_NAMESPACE_BEG_
 
-#if defined(LIBIPC_CC_MSVC)
+#if defined(LIBIMP_CC_MSVC)
 # include <Windows.h>   // YieldProcessor
 /**
  * @brief Not for intel c++ compiler, so ignore http://software.intel.com/en-us/forums/topic/296168
  * @see http://msdn.microsoft.com/en-us/library/windows/desktop/ms687419(v=vs.85).aspx
 */
 # define LIBIPC_LOCK_PAUSE_() YieldProcessor()
-#elif defined(LIBIPC_CC_GNUC)
-# if defined(LIBIPC_INSTR_X86_64)
+#elif defined(LIBIMP_CC_GNUC)
+# if defined(LIBIMP_INSTR_X86_64)
 /**
  * @brief Intel(R) 64 and IA-32 Architectures Software Developer's Manual V2
  *        PAUSE-Spin Loop Hint, 4-57
  * @see http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.html?wapkw=instruction+set+reference
 */
 #   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__("pause")
-# elif defined(LIBIPC_INSTR_I64)
+# elif defined(LIBIMP_INSTR_I64)
 /**
  * @brief Intel(R) Itanium(R) Architecture Developer's Manual, Vol.3
  *        hint - Performance Hint, 3:145
  * @see http://www.intel.com/content/www/us/en/processors/itanium/itanium-architecture-vol-3-manual.html
 */
 #   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__ ("hint @pause")
-# elif defined(LIBIPC_INSTR_ARM)
+# elif defined(LIBIMP_INSTR_ARM)
 /**
  * @brief ARM Architecture Reference Manuals (YIELD)
  * @see http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html

From 081e20bfd6456e727a312a2f479828500a6b1b4e Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 16 Oct 2022 20:10:41 +0800
Subject: [PATCH 067/272] add: [imp] span (TBD)

---
 include/libimp/span.h  | 180 +++++++++++++++++++++++++++++++++++++++++
 test/test_imp_span.cpp |   7 ++
 2 files changed, 187 insertions(+)
 create mode 100644 include/libimp/span.h
 create mode 100644 test/test_imp_span.cpp

diff --git a/include/libimp/span.h b/include/libimp/span.h
new file mode 100644
index 00000000..93d5f3de
--- /dev/null
+++ b/include/libimp/span.h
@@ -0,0 +1,180 @@
+/**
+ * @file libimp/span.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Describes an object that can refer to a contiguous sequence of objects
+ * @date 2022-10-16
+ */
+#pragma once
+
+#include <type_traits>
+#include <cstddef>
+#include <iterator>
+#include <array>
+#ifdef LIBIMP_CPP_20
+#include <span>
+#endif // LIBIMP_CPP_20
+
+#include "libimp/def.h"
+#include "libimp/detect_plat.h"
+
+LIBIMP_NAMESPACE_BEG_
+namespace detail {
+
+/// @brief helper trait for span
+
+template <typename From, typename To>
+using array_convertible = std::is_convertible<From(*)[], To(*)[]>;
+
+template <typename T, typename Ref>
+using compatible_ref = array_convertible<typename std::remove_reference<Ref>::type, T>;
+
+template <typename It>
+using iter_reference_t = decltype(*std::declval<It&>());
+
+template <typename From, typename To>
+using is_array_convertible = 
+  typename std::enable_if<array_convertible<From, To>::value>::type;
+
+template <typename T, typename It>
+using is_compatible_iter = 
+  typename std::enable_if<compatible_ref<T, iter_reference_t<It>>::value>::type;
+
+template <typename From, typename To>
+using is_inconvertible = 
+  typename std::enable_if<!std::is_convertible<From, To>::value>::type;
+
+/// @brief Obtain the address represented by p 
+///        without forming a reference to the object pointed to by p.
+/// @see   https://en.cppreference.com/w/cpp/memory/to_address
+
+template<typename T>
+constexpr T *to_address(T *ptr) noexcept {
+  static_assert(!std::is_function<T>::value, "ptr shouldn't a function pointer");
+  return ptr;
+}
+
+template<typename T>
+constexpr auto to_address(T const &ptr) 
+  noexcept(noexcept(ptr.operator->()))
+        -> decltype(ptr.operator->()) {
+  return to_address(ptr.operator->());
+}
+
+} // namespace detail
+
+/**
+ * @brief A simple implementation of span.
+ * @see https://en.cppreference.com/w/cpp/container/span
+ */
+template <typename T>
+class span {
+public:
+  using element_type     = T;
+  using value_type       = typename std::remove_cv<element_type>::type;
+  using size_type        = std::size_t;
+  using difference_type  = std::ptrdiff_t;
+  using pointer          = element_type *;
+  using const_pointer    = typename std::remove_const<element_type>::type const *;
+  using reference        = element_type &;
+  using const_reference  = typename std::remove_const<element_type>::type const &;
+  using iterator         = pointer;
+  using reverse_iterator = std::reverse_iterator<iterator>;
+
+private:
+  pointer   ptr_    {nullptr};
+  size_type extent_ {0};
+
+public:
+  constexpr span() noexcept = default;
+  constexpr span(span const &) noexcept = default;
+  constexpr span & operator=(span const &) noexcept = default;
+
+  template <typename It, 
+            typename = detail::is_compatible_iter<T, It>>
+  constexpr span(It first, size_type count) noexcept
+    : ptr_   (detail::to_address(first))
+    , extent_(count) {}
+
+  template <typename It, typename End,
+            typename = detail::is_compatible_iter<T, It>,
+            typename = detail::is_compatible_iter<T, End>,
+            typename = detail::is_inconvertible<End, size_type>>
+  constexpr span(It first, End last) noexcept(noexcept(last - first))
+    : ptr_   (detail::to_address(first))
+    , extent_(static_cast<size_type>(last - first)) {}
+
+  template <typename U, std::size_t E,
+            typename = detail::is_array_convertible<U, element_type>>
+  constexpr span(U (&arr)[E]) noexcept
+    : span(static_cast<pointer>(arr), E) {}
+
+  template <typename U, std::size_t E,
+            typename = detail::is_array_convertible<U, element_type>>
+  constexpr span(std::array<U, E> &arr) noexcept
+	  : span(static_cast<pointer>(arr.data()), E) {}
+
+  template <typename U, std::size_t E,
+            typename = detail::is_array_convertible<typename std::add_const<U>::type, element_type>>
+  constexpr span(std::array<U, E> const &arr) noexcept
+	  : span(static_cast<pointer>(arr.data()), E) {}
+
+  template <typename U,
+            typename = detail::is_array_convertible<U, T>>
+  constexpr span(span<U> const &s) noexcept
+    : ptr_   (s.data())
+    , extent_(s.size()) {}
+
+#ifdef LIBIMP_CPP_20
+  template <typename U, std::size_t E,
+            typename = detail::is_array_convertible<U, T>>
+  constexpr span(std::span<U, E> const &s) noexcept
+    : ptr_   (s.data())
+    , extent_(s.size()) {}
+#endif // LIBIMP_CPP_20
+
+  constexpr size_type size() const noexcept {
+    return extent_;
+  }
+
+  constexpr size_type size_bytes() const noexcept {
+    return size() * sizeof(element_type);
+  }
+
+  constexpr bool empty() const noexcept {
+    return size() == 0;
+  }
+
+  constexpr pointer data() const noexcept {
+    return this->ptr_;
+  }
+
+  constexpr reference front() const noexcept {
+    return *data();
+  }
+
+  constexpr reference back() const noexcept {
+    return *(data() + (size() - 1));
+  }
+
+  constexpr reference operator[](size_type idx) const noexcept {
+    return *(data() + idx);
+  }
+
+  constexpr iterator begin() const noexcept {
+    return iterator(data());
+  }
+
+  constexpr iterator end() const noexcept {
+    return iterator(data() + this->size());
+  }
+
+  constexpr reverse_iterator rbegin() const noexcept {
+    return reverse_iterator(this->end());
+  }
+
+  constexpr reverse_iterator rend() const noexcept {
+    return reverse_iterator(this->begin());
+  }
+};
+
+LIBIMP_NAMESPACE_END_
diff --git a/test/test_imp_span.cpp b/test/test_imp_span.cpp
new file mode 100644
index 00000000..b432e3da
--- /dev/null
+++ b/test/test_imp_span.cpp
@@ -0,0 +1,7 @@
+
+#include "gtest/gtest.h"
+
+#include "libimp/span.h"
+
+TEST(span, span) {
+}
\ No newline at end of file

From 3a3168b6f47ccbdf133829300b757932f7362157 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 16 Oct 2022 20:23:04 +0800
Subject: [PATCH 068/272] upd: [imp] span (TBD)

---
 include/libimp/span.h | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/include/libimp/span.h b/include/libimp/span.h
index 93d5f3de..b77cce39 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -25,16 +25,16 @@ namespace detail {
 template <typename From, typename To>
 using array_convertible = std::is_convertible<From(*)[], To(*)[]>;
 
+template <typename From, typename To>
+using is_array_convertible = 
+  typename std::enable_if<array_convertible<From, To>::value>::type;
+
 template <typename T, typename Ref>
 using compatible_ref = array_convertible<typename std::remove_reference<Ref>::type, T>;
 
 template <typename It>
 using iter_reference_t = decltype(*std::declval<It&>());
 
-template <typename From, typename To>
-using is_array_convertible = 
-  typename std::enable_if<array_convertible<From, To>::value>::type;
-
 template <typename T, typename It>
 using is_compatible_iter = 
   typename std::enable_if<compatible_ref<T, iter_reference_t<It>>::value>::type;
@@ -43,6 +43,10 @@ template <typename From, typename To>
 using is_inconvertible = 
   typename std::enable_if<!std::is_convertible<From, To>::value>::type;
 
+template <typename S, typename I>
+using is_sized_sentinel_for = 
+  is_inconvertible<decltype(std::declval<S>() - std::declval<I>()), std::ptrdiff_t>;
+
 /// @brief Obtain the address represented by p 
 ///        without forming a reference to the object pointed to by p.
 /// @see   https://en.cppreference.com/w/cpp/memory/to_address
@@ -97,7 +101,7 @@ class span {
 
   template <typename It, typename End,
             typename = detail::is_compatible_iter<T, It>,
-            typename = detail::is_compatible_iter<T, End>,
+            typename = detail::is_sized_sentinel_for<End, It>,
             typename = detail::is_inconvertible<End, size_type>>
   constexpr span(It first, End last) noexcept(noexcept(last - first))
     : ptr_   (detail::to_address(first))

From 595c1e4112b66dbf5e3dec2ee681673f0b7d6c7f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 16 Oct 2022 21:40:54 +0800
Subject: [PATCH 069/272] fix: [imp] VS2015 error C2610

---
 include/libimp/detect_plat.h | 7 +++++--
 include/libimp/span.h        | 7 +++++--
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
index df3ac373..c445ed75 100644
--- a/include/libimp/detect_plat.h
+++ b/include/libimp/detect_plat.h
@@ -38,9 +38,12 @@
 // Compiler
 
 #if defined(_MSC_VER)
-# define LIBIMP_CC_MSVC
+# define LIBIMP_CC_MSVC      _MSC_VER
+# define LIBIMP_CC_MSVC_2015 1900
+# define LIBIMP_CC_MSVC_2017 1910
+# define LIBIMP_CC_MSVC_2019 1920
 #elif defined(__GNUC__)
-# define LIBIMP_CC_GNUC
+# define LIBIMP_CC_GNUC __GNUC__
 #else
 # error "This compiler is unsupported."
 #endif
diff --git a/include/libimp/span.h b/include/libimp/span.h
index b77cce39..36e43f58 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -91,7 +91,10 @@ class span {
 public:
   constexpr span() noexcept = default;
   constexpr span(span const &) noexcept = default;
-  constexpr span & operator=(span const &) noexcept = default;
+#if (LIBIMP_CC_MSVC > LIBIMP_CC_MSVC_2015)
+  constexpr
+#endif
+  span & operator=(span const &) noexcept = default;
 
   template <typename It, 
             typename = detail::is_compatible_iter<T, It>>
@@ -128,7 +131,7 @@ class span {
     : ptr_   (s.data())
     , extent_(s.size()) {}
 
-#ifdef LIBIMP_CPP_20
+#if defined(LIBIMP_CPP_20) || defined(__cpp_lib_span)
   template <typename U, std::size_t E,
             typename = detail::is_array_convertible<U, T>>
   constexpr span(std::span<U, E> const &s) noexcept

From a0271041eeea99dd34b504a3455c8af6b0d805df Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 29 Oct 2022 15:47:12 +0800
Subject: [PATCH 070/272] upd: [imp] span improved

---
 include/libimp/span.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/include/libimp/span.h b/include/libimp/span.h
index 36e43f58..d4065b9b 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -10,6 +10,9 @@
 #include <cstddef>
 #include <iterator>
 #include <array>
+#include <limits>
+#include <algorithm>
+#include <cstdint>
 #ifdef LIBIMP_CPP_20
 #include <span>
 #endif // LIBIMP_CPP_20
@@ -182,6 +185,27 @@ class span {
   constexpr reverse_iterator rend() const noexcept {
     return reverse_iterator(this->begin());
   }
+
+  constexpr span<element_type> first(size_type count) const noexcept {
+    return span(begin(), count);
+  }
+
+  constexpr span<element_type> last(size_type count) const noexcept {
+    return span(end() - count, count);
+  }
+
+  constexpr span<element_type> subspan(size_type offset, size_type count = (std::numeric_limits<size_type>::max)()) const noexcept {
+    if (offset >= size()) {
+      return {};
+    }
+    return span(begin() + offset, (std::min)(size() - offset, count));
+  }
 };
 
+template <typename T, 
+          typename Byte = typename std::conditional<std::is_const<T>::value, std::uint8_t const, std::uint8_t>::type>
+auto as_bytes(span<T> s) noexcept -> span<Byte> {
+  return {reinterpret_cast<Byte *>(s.data()), s.size_bytes()};
+}
+
 LIBIMP_NAMESPACE_END_

From a0076f6bfb92b3377829170da5fac308282bf379 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 29 Oct 2022 19:19:11 +0800
Subject: [PATCH 071/272] add: [imp] span ut

---
 include/libimp/span.h  | 61 +++++++++++++++++++++++++++++++++++++++++-
 test/test_imp_span.cpp | 49 +++++++++++++++++++++++++++++++++
 2 files changed, 109 insertions(+), 1 deletion(-)

diff --git a/include/libimp/span.h b/include/libimp/span.h
index d4065b9b..2e013a8b 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -10,9 +10,12 @@
 #include <cstddef>
 #include <iterator>
 #include <array>
+#include <vector>
+#include <string>
 #include <limits>
 #include <algorithm>
 #include <cstdint>
+#include <initializer_list>
 #ifdef LIBIMP_CPP_20
 #include <span>
 #endif // LIBIMP_CPP_20
@@ -48,7 +51,8 @@ using is_inconvertible =
 
 template <typename S, typename I>
 using is_sized_sentinel_for = 
-  is_inconvertible<decltype(std::declval<S>() - std::declval<I>()), std::ptrdiff_t>;
+  typename std::enable_if<std::is_convertible<decltype(std::declval<S>() - std::declval<I>()), 
+                          std::ptrdiff_t>::value>::type;
 
 /// @brief Obtain the address represented by p 
 ///        without forming a reference to the object pointed to by p.
@@ -202,10 +206,65 @@ class span {
   }
 };
 
+template <typename T, typename U, 
+          typename = decltype(std::declval<T>() == std::declval<U>())>
+bool operator==(span<T> a, span<U> b) noexcept {
+  if (a.size() != b.size()) {
+    return false;
+  }
+  for (std::size_t i = 0; i < a.size(); ++i) {
+    if (a[i] != b[i]) return false;
+  }
+  return true;
+}
+
 template <typename T, 
           typename Byte = typename std::conditional<std::is_const<T>::value, std::uint8_t const, std::uint8_t>::type>
 auto as_bytes(span<T> s) noexcept -> span<Byte> {
   return {reinterpret_cast<Byte *>(s.data()), s.size_bytes()};
 }
 
+template <typename T>
+auto make_span(T *arr, std::size_t count) noexcept -> span<T> {
+  return {arr, count};
+}
+
+template <typename T, std::size_t E>
+auto make_span(T (&arr)[E]) noexcept -> span<T> {
+  return {arr};
+}
+
+template <typename T, std::size_t E>
+auto make_span(std::array<T, E> const &arr) noexcept -> span<T> {
+  return {arr};
+}
+
+template <typename T, std::size_t E>
+auto make_span(std::array<T, E> const &arr) noexcept -> span<typename std::add_const<T>::type> {
+  return {arr};
+}
+
+template <typename T>
+auto make_span(std::vector<T> &arr) noexcept -> span<T> {
+  return {arr.data(), arr.size()};
+}
+
+template <typename T>
+auto make_span(std::vector<T> const &arr) noexcept -> span<typename std::add_const<T>::type> {
+  return {arr.data(), arr.size()};
+}
+
+template <typename T>
+auto make_span(std::initializer_list<T> list) noexcept -> span<typename std::add_const<T>::type> {
+  return {list.begin(), list.end()};
+}
+
+inline auto make_span(std::string &str) noexcept -> span<char> {
+  return {const_cast<char *>(str.data()), str.size()};
+}
+
+inline auto make_span(std::string const &str) noexcept -> span<char const> {
+  return {str.data(), str.size()};
+}
+
 LIBIMP_NAMESPACE_END_
diff --git a/test/test_imp_span.cpp b/test/test_imp_span.cpp
index b432e3da..0c7a4826 100644
--- a/test/test_imp_span.cpp
+++ b/test/test_imp_span.cpp
@@ -1,7 +1,56 @@
 
+#include <string>
+#include <memory>
+
 #include "gtest/gtest.h"
 
 #include "libimp/span.h"
+#include "libimp/countof.h"
+
+TEST(span, to_address) {
+  int *a = new int;
+  EXPECT_EQ(imp::detail::to_address(a), a);
+  std::unique_ptr<int> b {a};
+  EXPECT_EQ(imp::detail::to_address(b), a);
+}
 
 TEST(span, span) {
+  auto test_proc = [](auto &&buf, auto &&sp) {
+    EXPECT_EQ(imp::countof(buf), sp.size());
+    EXPECT_EQ(sizeof(buf[0]) * imp::countof(buf), sp.size_bytes());
+    for (int i = 0; i < sp.size(); ++i) {
+      EXPECT_EQ(buf[i], sp[i]);
+    }
+  };
+  {
+    int buf[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
+    auto sp = imp::make_span(buf);
+    test_proc(buf, sp);
+    test_proc(imp::make_span({0, 1, 2})   , sp.first(3));
+    test_proc(imp::make_span({6, 7, 8, 9}), sp.last(4));
+    test_proc(imp::make_span({3, 4, 5, 6}), sp.subspan(3, 4));
+    test_proc(imp::make_span({3, 4, 5, 6, 7, 8, 9}), sp.subspan(3));
+  }
+  {
+    std::vector<int> buf = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
+    auto sp = imp::make_span(buf);
+    imp::span<int> sp2 {buf.begin(), buf.end()};
+    EXPECT_EQ(sp, sp2);
+    test_proc(buf, sp);
+    test_proc(imp::make_span({0, 1, 2})   , sp.first(3));
+    test_proc(imp::make_span({6, 7, 8, 9}), sp.last(4));
+    test_proc(imp::make_span({3, 4, 5, 6}), sp.subspan(3, 4));
+    test_proc(imp::make_span({3, 4, 5, 6, 7, 8, 9}), sp.subspan(3));
+    test_proc(imp::make_span((char *)sp.data(), sp.size_bytes()), imp::as_bytes(sp));
+  }
+  {
+    std::string buf = "0123456789";
+    auto sp = imp::make_span(buf);
+    // if (sp == imp::make_span({nullptr})) {}
+    test_proc(buf, sp);
+    test_proc(imp::make_span("012", 3) , sp.first(3));
+    test_proc(imp::make_span("6789", 4), sp.last(4));
+    test_proc(imp::make_span("3456", 4), sp.subspan(3, 4));
+    test_proc(imp::make_span("3456789", 7), sp.subspan(3));
+  }
 }
\ No newline at end of file

From 0e66c9a9bd9d3efe5e1c1d134819ec23bd792d5d Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 29 Oct 2022 19:32:51 +0800
Subject: [PATCH 072/272] fix: [imp] error C3259: 'constexpr' functions can
 only have one return statement

---
 include/libimp/span.h | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/include/libimp/span.h b/include/libimp/span.h
index 2e013a8b..c686f8dc 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -190,22 +190,21 @@ class span {
     return reverse_iterator(this->begin());
   }
 
-  constexpr span<element_type> first(size_type count) const noexcept {
+  constexpr span first(size_type count) const noexcept {
     return span(begin(), count);
   }
 
-  constexpr span<element_type> last(size_type count) const noexcept {
+  constexpr span last(size_type count) const noexcept {
     return span(end() - count, count);
   }
 
-  constexpr span<element_type> subspan(size_type offset, size_type count = (std::numeric_limits<size_type>::max)()) const noexcept {
-    if (offset >= size()) {
-      return {};
-    }
-    return span(begin() + offset, (std::min)(size() - offset, count));
+  constexpr span subspan(size_type offset, size_type count = (std::numeric_limits<size_type>::max)()) const noexcept {
+    return (offset >= size()) ? span() : span(begin() + offset, (std::min)(size() - offset, count));
   }
 };
 
+/// @brief Support for span equals comparison.
+
 template <typename T, typename U, 
           typename = decltype(std::declval<T>() == std::declval<U>())>
 bool operator==(span<T> a, span<U> b) noexcept {

From 2dd85adc527e3172ee4c4f4814703f3e9f9f72ed Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 29 Oct 2022 19:46:39 +0800
Subject: [PATCH 073/272] add: [imp] comments

---
 include/libimp/span.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/libimp/span.h b/include/libimp/span.h
index c686f8dc..d2596bb6 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -56,7 +56,7 @@ using is_sized_sentinel_for =
 
 /// @brief Obtain the address represented by p 
 ///        without forming a reference to the object pointed to by p.
-/// @see   https://en.cppreference.com/w/cpp/memory/to_address
+/// @see https://en.cppreference.com/w/cpp/memory/to_address
 
 template<typename T>
 constexpr T *to_address(T *ptr) noexcept {
@@ -217,12 +217,19 @@ bool operator==(span<T> a, span<U> b) noexcept {
   return true;
 }
 
+/// @brief Converts a span into a view of its underlying bytes.
+/// @see https://en.cppreference.com/w/cpp/container/span/as_bytes
+
 template <typename T, 
           typename Byte = typename std::conditional<std::is_const<T>::value, std::uint8_t const, std::uint8_t>::type>
 auto as_bytes(span<T> s) noexcept -> span<Byte> {
   return {reinterpret_cast<Byte *>(s.data()), s.size_bytes()};
 }
 
+/// @brief Constructs an object of type T and wraps it in a span.
+/// Before C++17, template argument deduction for class templates was not supported.
+/// @see https://en.cppreference.com/w/cpp/language/template_argument_deduction
+
 template <typename T>
 auto make_span(T *arr, std::size_t count) noexcept -> span<T> {
   return {arr, count};

From 7d39e5395a16daaabf462f7b43b370f4a8fccb0c Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 30 Oct 2022 12:26:43 +0800
Subject: [PATCH 074/272] upd: [ipc] yield

---
 include/libipc/spin_lock.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/libipc/spin_lock.h b/include/libipc/spin_lock.h
index 9ae55bf9..1e374d25 100644
--- a/include/libipc/spin_lock.h
+++ b/include/libipc/spin_lock.h
@@ -34,7 +34,7 @@ inline void yield(K &k) noexcept {
   else
   if (k < 32) { std::this_thread::yield(); }
   else {
-    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+    std::this_thread::sleep_for(std::chrono::microseconds(1));
     return;
   }
   ++k;

From 938ba67c7a1551dd29b9db902f64b98db93f959b Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 30 Oct 2022 14:55:15 +0800
Subject: [PATCH 075/272] upd: [imp] using the win api corresponds to the
 character set conversion in win

---
 src/libimp/codecvt.cpp            | 37 ++++++++----
 src/libimp/platform/win/codecvt.h | 97 +++++++++++++++++++++++++++++++
 test/test_imp_codecvt.cpp         | 26 +++++----
 3 files changed, 136 insertions(+), 24 deletions(-)
 create mode 100644 src/libimp/platform/win/codecvt.h

diff --git a/src/libimp/codecvt.cpp b/src/libimp/codecvt.cpp
index 57c6e0cb..417b704b 100644
--- a/src/libimp/codecvt.cpp
+++ b/src/libimp/codecvt.cpp
@@ -8,13 +8,22 @@
 #include "libimp/log.h"
 #include "libimp/detect_plat.h"
 
+#if defined(LIBIMP_OS_WIN)
+#include "libimp/platform/win/codecvt.h"
+#endif
+
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @brief The transform between local-character-set(UTF-8/GBK/...) and UTF-16/32
+ * @brief The transform between local-character-set(UTF-8/GBK/...) and UTF-16/32.
+ * 
+ * Modified from UnicodeConverter.
+ * Copyright (c) 2010. Jianhui Qin (http://blog.csdn.net/jhqin).
  * 
- * Modified from UnicodeConverter
- * Copyright (c) 2010. Jianhui Qin (http://blog.csdn.net/jhqin)
+ * @remarks codecvt_utf8_utf16/std::wstring_convert is deprecated.
+ * @see https://codingtidbit.com/2020/02/09/c17-codecvt_utf8-is-deprecated/
+ *      https://stackoverflow.com/questions/42946335/deprecated-header-codecvt-replacement
+ *      https://en.cppreference.com/w/cpp/locale/codecvt/in
  */
 namespace {
 
@@ -323,33 +332,37 @@ auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noex
 // #define LIBIMP_DEF_CVT_CSTR_($char_t, $char_u)
 
 LIBIMP_DEF_CVT_CSTR_(char    , char)
-LIBIMP_DEF_CVT_CSTR_(char    , wchar_t)
 LIBIMP_DEF_CVT_CSTR_(char    , char16_t)
 LIBIMP_DEF_CVT_CSTR_(char    , char32_t)
 LIBIMP_DEF_CVT_CSTR_(wchar_t , wchar_t)
-LIBIMP_DEF_CVT_CSTR_(wchar_t , char)
-LIBIMP_DEF_CVT_CSTR_(wchar_t , char16_t)
-LIBIMP_DEF_CVT_CSTR_(wchar_t , char32_t)
 LIBIMP_DEF_CVT_CSTR_(char16_t, char16_t)
 LIBIMP_DEF_CVT_CSTR_(char16_t, char)
-LIBIMP_DEF_CVT_CSTR_(char16_t, wchar_t)
 LIBIMP_DEF_CVT_CSTR_(char16_t, char32_t)
 LIBIMP_DEF_CVT_CSTR_(char32_t, char32_t)
 LIBIMP_DEF_CVT_CSTR_(char32_t, char)
-LIBIMP_DEF_CVT_CSTR_(char32_t, wchar_t)
 LIBIMP_DEF_CVT_CSTR_(char32_t, char16_t)
+#if !defined(LIBIMP_OS_WIN)
+LIBIMP_DEF_CVT_CSTR_(char    , wchar_t)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , char)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , char16_t)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , char32_t)
+LIBIMP_DEF_CVT_CSTR_(char16_t, wchar_t)
+LIBIMP_DEF_CVT_CSTR_(char32_t, wchar_t)
+#endif // !defined(LIBIMP_OS_WIN)
 
 #if defined(LIBIMP_CPP_20)
 LIBIMP_DEF_CVT_CSTR_(char8_t , char8_t)
 LIBIMP_DEF_CVT_CSTR_(char8_t , char)
-LIBIMP_DEF_CVT_CSTR_(char8_t , wchar_t)
 LIBIMP_DEF_CVT_CSTR_(char8_t , char16_t)
 LIBIMP_DEF_CVT_CSTR_(char8_t , char32_t)
 LIBIMP_DEF_CVT_CSTR_(char    , char8_t)
-LIBIMP_DEF_CVT_CSTR_(wchar_t , char8_t)
 LIBIMP_DEF_CVT_CSTR_(char16_t, char8_t)
 LIBIMP_DEF_CVT_CSTR_(char32_t, char8_t)
-#endif
+#if !defined(LIBIMP_OS_WIN)
+LIBIMP_DEF_CVT_CSTR_(char8_t , wchar_t)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , char8_t)
+#endif // !defined(LIBIMP_OS_WIN)
+#endif // defined(LIBIMP_CPP_20)
 
 #undef LIBIMP_DEF_CVT_CSTR_
 
diff --git a/src/libimp/platform/win/codecvt.h b/src/libimp/platform/win/codecvt.h
new file mode 100644
index 00000000..8d865a77
--- /dev/null
+++ b/src/libimp/platform/win/codecvt.h
@@ -0,0 +1,97 @@
+/**
+ * @file libimp/platform/win/codecvt.h
+ * @author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <Windows.h>
+
+#include "libimp/codecvt.h"
+#include "libimp/log.h"
+#include "libimp/system.h"
+#include "libimp/detect_plat.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * @see https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-multibytetowidechar
+ *      https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-widechartomultibyte
+ * 
+ *      CP_ACP       : The system default Windows ANSI code page.
+ *      CP_MACCP     : The current system Macintosh code page.
+ *      CP_OEMCP     : The current system OEM code page.
+ *      CP_SYMBOL    : Symbol code page (42).
+ *      CP_THREAD_ACP: The Windows ANSI code page for the current thread.
+ *      CP_UTF7      : UTF-7. Use this value only when forced by a 7-bit transport mechanism. Use of UTF-8 is preferred.
+ *      CP_UTF8      : UTF-8.
+*/
+
+template <>
+std::size_t cvt_cstr(char const *src, std::size_t slen, wchar_t *des, std::size_t dlen) noexcept {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  int cch_wc = (des == nullptr) ? 0 : (int)dlen;
+  int size_needed = ::MultiByteToWideChar(CP_ACP, 0, src, (int)slen, des, cch_wc);
+  if (size_needed <= 0) {
+    log.error("MultiByteToWideChar fails. error = {}", sys::error_code());
+  }
+  return size_needed;
+}
+
+template <>
+std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char *des, std::size_t dlen) noexcept {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  int cb_mb = (des == nullptr) ? 0 : (int)dlen;
+  int size_needed = ::WideCharToMultiByte(CP_ACP, 0, src, (int)slen, des, cb_mb, NULL, NULL);
+  if (size_needed <= 0) {
+    log.error("WideCharToMultiByte fails. error = {}", sys::error_code());
+  }
+  return size_needed;
+}
+
+/**
+ * @brief Used for char8_t (since C++20) to wchar_t conversion.
+ * 
+ * There is no ut to guarantee correctness (I'm a little lazy here), 
+ * so if there are any bugs, please contact me in time.
+ */
+#if defined(LIBIMP_CPP_20)
+template <>
+std::size_t cvt_cstr(char8_t const *src, std::size_t slen, wchar_t *des, std::size_t dlen) noexcept {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  int cch_wc = (des == nullptr) ? 0 : (int)dlen;
+  int size_needed = ::MultiByteToWideChar(CP_UTF8, 0, (char *)src, (int)slen, des, cch_wc);
+  if (size_needed <= 0) {
+    log.error("MultiByteToWideChar fails. error = {}", sys::error_code());
+  }
+  return size_needed;
+}
+
+template <>
+std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char8_t *des, std::size_t dlen) noexcept {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  int cb_mb = (des == nullptr) ? 0 : (int)dlen;
+  int size_needed = ::WideCharToMultiByte(CP_UTF8, 0, src, (int)slen, (char *)des, cb_mb, NULL, NULL);
+  if (size_needed <= 0) {
+    log.error("WideCharToMultiByte fails. error = {}", sys::error_code());
+  }
+  return size_needed;
+}
+#endif // defined(LIBIMP_CPP_20)
+
+LIBIMP_NAMESPACE_END_
diff --git a/test/test_imp_codecvt.cpp b/test/test_imp_codecvt.cpp
index 34d5b120..2e8c8e49 100644
--- a/test/test_imp_codecvt.cpp
+++ b/test/test_imp_codecvt.cpp
@@ -5,39 +5,41 @@
 #include "gtest/gtest.h"
 
 #include "libimp/codecvt.h"
+#include "libimp/countof.h"
 
 TEST(codecvt, cvt_cstr) {
   char const *utf8 = "hello world, "
                      "\xe4\xbd\xa0\xe5\xa5\xbd\xef\xbc"
                      "\x8c\xe3\x81\x93\xe3\x82\x93\xe3"
                      "\x81\xab\xe3\x81\xa1\xe3\x81\xaf";
-  wchar_t const *utf16 = L"hello world, \u4f60\u597d\uff0c\u3053\u3093\u306b\u3061\u306f";
+  char16_t const utf16[] = u"hello world, "
+                            "\u4f60\u597d\uff0c\u3053\u3093\u306b\u3061\u306f";
   {
-    auto cvt_len = imp::cvt_cstr(utf8, std::strlen(utf8), (wchar_t *)nullptr, 0);
+    auto cvt_len = imp::cvt_cstr(utf8, std::strlen(utf8), (char16_t *)nullptr, 0);
     EXPECT_NE(cvt_len, 0);
-    std::wstring wstr(cvt_len, L'\0');
+    std::u16string wstr(cvt_len, L'\0');
     EXPECT_EQ(imp::cvt_cstr(utf8, std::strlen(utf8), &wstr[0], wstr.size()), cvt_len);
-    EXPECT_STREQ(wstr.c_str(), utf16);
+    EXPECT_EQ(wstr, utf16);
   }
   {
-    auto cvt_len = imp::cvt_cstr(utf16, std::wcslen(utf16), (char *)nullptr, 0);
+    auto cvt_len = imp::cvt_cstr(utf16, imp::countof(utf16) - 1, (char *)nullptr, 0);
     EXPECT_NE(cvt_len, 0);
     std::string str(cvt_len, '\0');
-    EXPECT_EQ(imp::cvt_cstr(utf16, std::wcslen(utf16), &str[0], str.size()), cvt_len);
-    EXPECT_STREQ(str.c_str(), utf8);
+    EXPECT_EQ(imp::cvt_cstr(utf16, imp::countof(utf16) - 1, &str[0], str.size()), cvt_len);
+    EXPECT_EQ(str, utf8);
   }
   {
     auto cvt_len = imp::cvt_cstr(utf8, std::strlen(utf8), (char *)nullptr, 0);
     EXPECT_EQ(cvt_len, std::strlen(utf8));
     std::string str(cvt_len, '\0');
     EXPECT_EQ(imp::cvt_cstr(utf8, cvt_len, &str[0], str.size()), cvt_len);
-    EXPECT_STREQ(str.c_str(), utf8);
+    EXPECT_EQ(str, utf8);
   }
   {
-    auto cvt_len = imp::cvt_cstr(utf16, std::wcslen(utf16), (wchar_t *)nullptr, 0);
-    EXPECT_EQ(cvt_len, std::wcslen(utf16));
-    std::wstring wstr(cvt_len, L'\0');
+    auto cvt_len = imp::cvt_cstr(utf16, imp::countof(utf16) - 1, (char16_t *)nullptr, 0);
+    EXPECT_EQ(cvt_len, imp::countof(utf16) - 1);
+    std::u16string wstr(cvt_len, u'\0');
     EXPECT_EQ(imp::cvt_cstr(utf16, cvt_len, &wstr[0], wstr.size()), cvt_len);
-    EXPECT_STREQ(wstr.c_str(), utf16);
+    EXPECT_EQ(wstr, utf16);
   }
 }
\ No newline at end of file

From d003e940765e8c8a677619d2d6b9666374399071 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 30 Oct 2022 15:21:45 +0800
Subject: [PATCH 076/272] add: [imp] sys::error object

---
 include/libimp/system.h  | 32 ++++++++++++++++++++++++++++++++
 src/libimp/system.cpp    | 37 +++++++++++++++++++++++++++++++++++++
 test/test_imp_system.cpp | 21 ++++++++++++++-------
 3 files changed, 83 insertions(+), 7 deletions(-)

diff --git a/include/libimp/system.h b/include/libimp/system.h
index ceba4072..60d0d37c 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <string>
+#include <ostream>  // std::ostream
 #include <cstdint>
 
 #include "libimp/def.h"
@@ -32,6 +33,28 @@ LIBIMP_EXPORT std::string error_str(result_code) noexcept;
  */
 LIBIMP_EXPORT std::string error_msg(result_code) noexcept;
 
+/**
+ * @brief The system error object.
+ */
+class LIBIMP_EXPORT error {
+  result_code r_code_;
+
+public:
+  explicit error() noexcept;
+  explicit error(result_code rc) noexcept;
+
+  result_code code() const noexcept;
+  std::uint64_t value() const noexcept;
+  explicit operator bool() const noexcept;
+
+  std::string str() const noexcept;
+
+  friend bool operator==(error const &lhs, error const &rhs) noexcept;
+  friend bool operator!=(error const &lhs, error const &rhs) noexcept;
+
+  friend std::ostream &operator<<(std::ostream &o, error const &e);
+};
+
 /**
  * @brief Get system configuration information at run time
  */
@@ -42,3 +65,12 @@ LIBIMP_EXPORT std::int64_t conf(info) noexcept;
 
 } // namespace sys
 LIBIMP_NAMESPACE_END_
+
+template <>
+struct fmt::formatter<::LIBIMP_::sys::error>
+          : formatter<std::string> {
+  template <typename FormatContext>
+  auto format(::LIBIMP_::sys::error r, FormatContext &ctx) {
+    return format_to(ctx.out(), "{}", ::LIBIMP_::sys::error_msg(r.code()));
+  }
+};
diff --git a/src/libimp/system.cpp b/src/libimp/system.cpp
index 94e56bcb..958d2cda 100644
--- a/src/libimp/system.cpp
+++ b/src/libimp/system.cpp
@@ -18,5 +18,42 @@ std::string error_msg(result_code code) noexcept {
   }
 }
 
+/// @brief The system error object.
+
+error::error() noexcept
+  : error(error_code()) {}
+
+error::error(result_code rc) noexcept
+  : r_code_(rc) {}
+
+result_code error::code() const noexcept {
+  return r_code_;
+}
+
+std::uint64_t error::value() const noexcept {
+  return r_code_.value();
+}
+
+error::operator bool() const noexcept {
+  return !!r_code_;
+}
+
+std::string error::str() const noexcept {
+  return error_str(r_code_);
+}
+
+bool operator==(error const &lhs, error const &rhs) noexcept {
+  return lhs.code() == rhs.code();
+}
+
+bool operator!=(error const &lhs, error const &rhs) noexcept {
+  return lhs.code() != rhs.code();
+}
+
+std::ostream &operator<<(std::ostream &o, error const &e) {
+  o << error_msg(e.code());
+  return o;
+}
+
 } // namespace sys
 LIBIMP_NAMESPACE_END_
diff --git a/test/test_imp_system.cpp b/test/test_imp_system.cpp
index 7b85fc4e..a6a6bcd2 100644
--- a/test/test_imp_system.cpp
+++ b/test/test_imp_system.cpp
@@ -1,5 +1,6 @@
 
 #include <iostream>
+#include <string>
 
 #include "gtest/gtest.h"
 #include "fmt/format.h"
@@ -14,8 +15,6 @@
 #endif
 
 TEST(system, error_code) {
-  std::cout << fmt::format("{}\n", imp::sys::error_msg(imp::sys::error_code()));
-
   imp::sys::error_code({false, 111});
   auto err = imp::sys::error_code();
   EXPECT_FALSE(err);
@@ -23,20 +22,28 @@ TEST(system, error_code) {
 
   imp::sys::error_code({});
   EXPECT_TRUE(imp::sys::error_code());
+
+  imp::sys::error e_obj {err};
+  EXPECT_EQ(err.value(), e_obj.value());
+  auto e_msg = fmt::format("{}", imp::sys::error_msg(imp::sys::error_code()));
+  std::stringstream ss;
+  ss << imp::sys::error{};
+  EXPECT_EQ(e_msg, ss.str());
+  std::cout << e_msg << "\n";
 }
 
 TEST(system, error_str) {
 #if defined(LIBIMP_OS_WIN)
-  std::u16string u16_ok, u16_err;
+  std::wstring u16_ok, u16_err;
   LANGID lId = ::GetSystemDefaultLangID();
   switch (lId) {
   case 0x0804:
-    u16_ok  = u"操作成功完成。\r\n";
-    u16_err = u"句柄无效。\r\n";
+    u16_ok  = L"操作成功完成。\r\n";
+    u16_err = L"句柄无效。\r\n";
     break;
   case 0x0409:
-    u16_ok  = u"The operation completed successfully.\r\n";
-    u16_err = u"The handle is invalid.\r\n";
+    u16_ok  = L"The operation completed successfully.\r\n";
+    u16_err = L"The handle is invalid.\r\n";
     break;
   default:
     return;

From af654d5769378c2d68c33abec9e81f90a58ee22d Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 30 Oct 2022 15:25:56 +0800
Subject: [PATCH 077/272] upd: [imp] sys::error ut

---
 test/test_imp_system.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test/test_imp_system.cpp b/test/test_imp_system.cpp
index a6a6bcd2..ff8832e6 100644
--- a/test/test_imp_system.cpp
+++ b/test/test_imp_system.cpp
@@ -29,6 +29,7 @@ TEST(system, error_code) {
   std::stringstream ss;
   ss << imp::sys::error{};
   EXPECT_EQ(e_msg, ss.str());
+  EXPECT_EQ(e_msg, fmt::format("{}", imp::sys::error()));
   std::cout << e_msg << "\n";
 }
 

From d55d9f549fdd91f6c0171484c43b01a86f8c4721 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 30 Oct 2022 16:09:02 +0800
Subject: [PATCH 078/272] add: [ipc] shared_memory object

---
 include/libipc/shm.h                 | 33 +++++++++++++-
 src/libipc/platform/posix/shm_impl.h | 10 ++---
 src/libipc/platform/win/get_sa.h     |  4 +-
 src/libipc/platform/win/mmap_impl.h  | 49 ++++++++++++++-------
 src/libipc/shm.cpp                   | 65 +++++++++++++++++++++++++++-
 test/test_ipc_shm.cpp                | 49 ++++++++++++++++++++-
 6 files changed, 185 insertions(+), 25 deletions(-)

diff --git a/include/libipc/shm.h b/include/libipc/shm.h
index c7e697db..666ca18e 100644
--- a/include/libipc/shm.h
+++ b/include/libipc/shm.h
@@ -37,6 +37,37 @@ LIBIMP_EXPORT std::size_t shm_size(shm_t) noexcept;
 
 /// @brief Gets the name of the shared memory file based on the shared memory handle.
 /// @return empty string on failure.
-LIBIMP_EXPORT std::string shm_file(shm_t) noexcept;
+LIBIMP_EXPORT std::string shm_name(shm_t) noexcept;
+
+/**
+ * @brief The shared memory object.
+ */
+class LIBIMP_EXPORT shared_memory {
+  shm_t shm_;
+
+public:
+  explicit shared_memory() noexcept;
+  ~shared_memory() noexcept;
+
+  shared_memory(shared_memory &&other) noexcept;
+  shared_memory &operator=(shared_memory &&rhs) & noexcept;
+  void swap(shared_memory &other) noexcept;
+
+  explicit shared_memory(std::string name, 
+                         std::size_t size = 0, 
+                         mode::type = mode::create | mode::open) noexcept;
+
+  bool open(std::string name, std::size_t size, mode::type) noexcept;
+  void close() noexcept;
+  bool valid() const noexcept;
+
+  void *get() const noexcept;
+  void *operator*() const noexcept;
+  template <typename T>
+  T *as() { return static_cast<T *>(get()); }
+
+  std::size_t size() const noexcept;
+  std::string name() const noexcept;
+};
 
 LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
index d7bb2eac..13a320dd 100644
--- a/src/libipc/platform/posix/shm_impl.h
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -67,7 +67,7 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
                                           S_IRGRP | S_IWGRP |
                                           S_IROTH | S_IWOTH);
   if (fd == posix::failed) {
-    log.error("shm_open fails. error = {}", sys::error_msg(sys::error_code()));
+    log.error("shm_open fails. error = {}", sys::error());
     return {};
   }
 
@@ -75,14 +75,14 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
     /// @brief Try to get the size of this fd
     struct stat st;
     if (::fstat(fd, &st) == posix::failed) {
-      log.error("fstat fails. error = {}", sys::error_msg(sys::error_code()));
+      log.error("fstat fails. error = {}", sys::error());
       ::shm_unlink(name.c_str());
       return {};
     }
     size = static_cast<std::size_t>(st.st_size);
     /// @brief Truncate this fd to a specified length
   } else if (::ftruncate(fd, size) != 0) {
-    log.error("ftruncate fails. error = {}", sys::error_msg(sys::error_code()));
+    log.error("ftruncate fails. error = {}", sys::error());
     ::shm_unlink(name.c_str());
     return {};
   }
@@ -90,7 +90,7 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   /// @brief Creates a new mapping in the virtual address space of the calling process.
   void *mem = ::mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
   if (mem == MAP_FAILED) {
-    log.error("mmap fails. error = {}", sys::error_msg(sys::error_code()));
+    log.error("mmap fails. error = {}", sys::error());
     ::shm_unlink(name.c_str());
     return {};
   }
@@ -114,7 +114,7 @@ result_code shm_close(shm_t h) noexcept {
   }
   if (::munmap(shm->memp, shm->f_sz) == posix::failed) {
     auto ec = sys::error_code();
-    log.error("munmap fails. error = {}", sys::error_msg(ec));
+    log.error("munmap fails. error = {}", sys::error(ec));
     return ec;
   }
   /// @brief no unlink the file.
diff --git a/src/libipc/platform/win/get_sa.h b/src/libipc/platform/win/get_sa.h
index faea281e..78bae679 100644
--- a/src/libipc/platform/win/get_sa.h
+++ b/src/libipc/platform/win/get_sa.h
@@ -30,11 +30,11 @@ inline LPSECURITY_ATTRIBUTES get_sa() {
       using namespace ::LIBIMP_;
       log::gripper log {"get_sa"};
       if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
-        log.error("InitializeSecurityDescriptor fails. error = {}", sys::error_msg(sys::error_code()));
+        log.error("InitializeSecurityDescriptor fails. error = {}", sys::error());
         return;
       }
       if (!::SetSecurityDescriptorDacl(&sd_, TRUE, NULL, FALSE)) {
-        log.error("SetSecurityDescriptorDacl fails. error = {}", sys::error_msg(sys::error_code()));
+        log.error("SetSecurityDescriptorDacl fails. error = {}", sys::error());
         return;
       }
       sa_.nLength = sizeof(SECURITY_ATTRIBUTES);
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index 494532ca..3b199522 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -40,18 +40,21 @@ void mmap_close(HANDLE h) {
     return;
   }
   if (!::CloseHandle(h)) {
-    log.error("CloseHandle fails. error = {}", sys::error_msg(sys::error_code()));
+    log.error("CloseHandle fails. error = {}", sys::error());
   }
 }
 
 /**
  * @brief Creates or opens a file mapping object for a specified file.
+ * 
  * @see https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-openfilemappinga
  *      https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-createfilemappinga
+ * 
  * @param file Specifies the name of the file mapping object
  * @param size Specifies the size required to create a file mapping object.
  *             This size is ignored when opening an existing file mapping object
  * @param type Combinable open modes, create | open
+ * 
  * @return File mapping object HANDLE, NULL on error
  */
 HANDLE mmap_open(std::string const &file, std::size_t size, mode::type type) noexcept {
@@ -65,26 +68,42 @@ HANDLE mmap_open(std::string const &file, std::size_t size, mode::type type) noe
     log.error("file name is empty. (TCHAR conversion failed)");
     return NULL;
   }
+
   /// @brief Opens a named file mapping object.
-  if (type == mode::open) {
+  auto try_open = [&]() -> HANDLE {
     HANDLE h = ::OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, t_name.c_str());
     if (h == NULL) {
-      log.error("OpenFileMapping fails. error = {}", sys::error_msg(sys::error_code()));
+      log.error("OpenFileMapping fails. error = {}", sys::error());
+    }
+    return h;
+  };
+
+  /// @brief Creates or opens a named or unnamed file mapping object for a specified file.
+  auto try_create = [&]() -> HANDLE {
+    HANDLE h = ::CreateFileMapping(INVALID_HANDLE_VALUE, detail::get_sa(), PAGE_READWRITE | SEC_COMMIT,
+                                   /// @remark dwMaximumSizeHigh always 0 here.
+                                   0, static_cast<DWORD>(size), t_name.c_str());
+    if (h == NULL) {
+      log.error("CreateFileMapping fails. error = {}", sys::error());
+      return NULL;
     }
     return h;
+  };
+
+  if (type == mode::open) {
+    return try_open();
+  } else if ((type == (mode::create | mode::open)) && (size == 0)) {
+    /// @remark CreateFileMapping may returns ERROR_INVALID_PARAMETER when dwMaximumSizeLow is zero.
+    /// @see CreateFileMapping (Windows CE 5.0)
+    ///      https://learn.microsoft.com/en-us/previous-versions/windows/embedded/aa517331(v=msdn.10)
+    return try_open();
   } else if (!(type & mode::create)) {
     log.error("mode type is invalid. type = {}", type);
     return NULL;
   }
-  /// @brief Creates or opens a named or unnamed file mapping object for a specified file.
-  HANDLE h = ::CreateFileMapping(INVALID_HANDLE_VALUE, detail::get_sa(), PAGE_READWRITE | SEC_COMMIT,
-                                 0, static_cast<DWORD>(size), t_name.c_str());
-  if (h == NULL) {
-    log.error("CreateFileMapping fails. error = {}", sys::error_msg(sys::error_code()));
-    return NULL;
-  }
-  // If the object exists before the function call, the function returns a handle to the existing object
-  // (with its current size, not the specified size), and GetLastError returns ERROR_ALREADY_EXISTS.
+  HANDLE h = try_create();
+  /// @remark If the object exists before the function call, the function returns a handle to the existing object
+  ///         (with its current size, not the specified size), and GetLastError returns ERROR_ALREADY_EXISTS.
   if ((type == mode::create) && (::GetLastError() == ERROR_ALREADY_EXISTS)) {
     mmap_close(h);
     log.info("the file being created already exists. file = {}, type = {}", file, type);
@@ -105,7 +124,7 @@ LPVOID mmap_memof(HANDLE h) {
   }
   LPVOID mem = ::MapViewOfFile(h, FILE_MAP_ALL_ACCESS, 0, 0, 0);
   if (h == NULL) {
-    log.error("MapViewOfFile fails. error = {}", sys::error_msg(sys::error_code()));
+    log.error("MapViewOfFile fails. error = {}", sys::error());
     return NULL;
   }
   return mem;
@@ -123,7 +142,7 @@ SIZE_T mmap_sizeof(LPCVOID mem) {
   }
   MEMORY_BASIC_INFORMATION mem_info {};
   if (::VirtualQuery(mem, &mem_info, sizeof(mem_info)) == 0) {
-    log.error("VirtualQuery fails. error = {}", sys::error_msg(sys::error_code()));
+    log.error("VirtualQuery fails. error = {}", sys::error());
     return 0;
   }
   return mem_info.RegionSize;
@@ -144,7 +163,7 @@ void mmap_release(HANDLE h, LPCVOID mem) {
     return;
   }
   if (!::UnmapViewOfFile(mem)) {
-    log.warning("UnmapViewOfFile fails. error = {}", sys::error_msg(sys::error_code()));
+    log.warning("UnmapViewOfFile fails. error = {}", sys::error());
   }
   mmap_close(h);
 }
diff --git a/src/libipc/shm.cpp b/src/libipc/shm.cpp
index da15fb5c..58041935 100644
--- a/src/libipc/shm.cpp
+++ b/src/libipc/shm.cpp
@@ -1,4 +1,6 @@
 
+#include <utility>  // std::exchange, std::swap (since C++11)
+
 #include "libimp/log.h"
 
 #include "libimp/detect_plat.h"
@@ -10,6 +12,8 @@
 
 LIBIPC_NAMESPACE_BEG_
 
+/// @brief C style shared memory access interface implementation.
+
 void *shm_get(shm_t h) noexcept {
   LIBIMP_LOG_();
   if (h == nullptr) {
@@ -30,7 +34,7 @@ std::size_t shm_size(shm_t h) noexcept {
   return shm->f_sz;
 }
 
-std::string shm_file(shm_t h) noexcept {
+std::string shm_name(shm_t h) noexcept {
   LIBIMP_LOG_();
   if (h == nullptr) {
     log.error("shm handle is null.");
@@ -40,4 +44,63 @@ std::string shm_file(shm_t h) noexcept {
   return shm->file;
 }
 
+/// @brief The shared memory object.
+
+shared_memory::shared_memory() noexcept
+  : shm_(nullptr) {}
+
+shared_memory::~shared_memory() noexcept {
+  this->close();
+}
+
+shared_memory::shared_memory(shared_memory &&other) noexcept
+  : shm_(std::exchange(other.shm_, nullptr)) {}
+
+shared_memory &shared_memory::operator=(shared_memory &&rhs) & noexcept {
+  this->shm_ = std::exchange(rhs.shm_, nullptr);
+  return *this;
+}
+
+void shared_memory::swap(shared_memory &other) noexcept {
+  std::swap(this->shm_, other.shm_);
+}
+
+shared_memory::shared_memory(std::string name, std::size_t size, mode::type type) noexcept
+  : shared_memory() {
+  open(std::move(name), size, type);
+}
+
+bool shared_memory::open(std::string name, std::size_t size, mode::type type) noexcept {
+  this->close();
+  auto ret = shm_open(std::move(name), size, type);
+  if (!ret) return false;
+  shm_ = *ret;
+  return true;
+}
+
+void shared_memory::close() noexcept {
+  if (!valid()) return;
+  shm_close(std::exchange(shm_, nullptr));
+}
+
+bool shared_memory::valid() const noexcept {
+  return this->shm_ != nullptr;
+}
+
+void *shared_memory::get() const noexcept {
+  return shm_get(shm_);
+}
+
+void *shared_memory::operator*() const noexcept {
+  return this->get();
+}
+
+std::size_t shared_memory::size() const noexcept {
+  return shm_size(shm_);
+}
+
+std::string shared_memory::name() const noexcept {
+  return shm_name(shm_);
+}
+
 LIBIPC_NAMESPACE_END_
diff --git a/test/test_ipc_shm.cpp b/test/test_ipc_shm.cpp
index 830b10c2..99f7aac7 100644
--- a/test/test_ipc_shm.cpp
+++ b/test/test_ipc_shm.cpp
@@ -15,16 +15,63 @@ TEST(shm, create_close) {
   EXPECT_NE(pt1, nullptr);
   *(int *)pt1 = 0;
 
-  auto shm2 = ipc::shm_open(ipc::shm_file(*shm1), 0, ipc::mode::open);
+  auto shm2 = ipc::shm_open(ipc::shm_name(*shm1), 0, ipc::mode::create | ipc::mode::open);
   EXPECT_TRUE(shm2);
+  auto shm3 = ipc::shm_open(ipc::shm_name(*shm1), 128, ipc::mode::open);
+  EXPECT_TRUE(shm3);
+  auto shm4 = ipc::shm_open(ipc::shm_name(*shm1), 256, ipc::mode::create | ipc::mode::open);
+  EXPECT_TRUE(shm4);
   EXPECT_EQ(ipc::shm_size(*shm1), ipc::shm_size(*shm2));
+  EXPECT_EQ(ipc::shm_size(*shm1), ipc::shm_size(*shm3));
+  EXPECT_EQ(ipc::shm_size(*shm1), ipc::shm_size(*shm4));
   auto pt2 = ipc::shm_get(*shm1);
   EXPECT_NE(pt2, nullptr);
   EXPECT_EQ(*(int *)pt2, 0);
   *(int *)pt1 = 1234;
   EXPECT_EQ(*(int *)pt2, 1234);
 
+  EXPECT_TRUE(ipc::shm_close(*shm4));
+  EXPECT_TRUE(ipc::shm_close(*shm3));
   EXPECT_TRUE(ipc::shm_close(*shm2));
   EXPECT_TRUE(ipc::shm_close(*shm1));
   EXPECT_FALSE(ipc::shm_close(nullptr));
+}
+
+TEST(shm, shared_memory) {
+  ipc::shared_memory shm;
+  EXPECT_FALSE(shm.valid());
+  EXPECT_EQ(shm.size(), 0);
+  EXPECT_EQ(shm.name(), "");
+  EXPECT_EQ(shm.get()    , nullptr);
+  EXPECT_EQ(*shm         , nullptr);
+  EXPECT_EQ(shm.as<int>(), nullptr);
+  shm.close();
+
+  EXPECT_TRUE(shm.open("hello-ipc-shared-memory", 2048, ipc::mode::create | ipc::mode::open));
+  EXPECT_TRUE(shm.valid());
+  EXPECT_TRUE(shm.size() >= 2048);
+  EXPECT_EQ(shm.name(), "hello-ipc-shared-memory");
+  EXPECT_NE(shm.get()    , nullptr);
+  EXPECT_NE(*shm         , nullptr);
+  EXPECT_NE(shm.as<int>(), nullptr);
+  *shm.as<int>() = 4321;
+
+  auto shm_r = ipc::shm_open(shm.name());
+  ASSERT_TRUE(shm_r);
+  EXPECT_EQ(*static_cast<int *>(ipc::shm_get(*shm_r)), 4321);
+
+  shm = ipc::shared_memory("hello-ipc-shared-memory-2", 512);
+  EXPECT_TRUE(shm.valid());
+  EXPECT_TRUE(shm.size() >= 512);
+  EXPECT_EQ(shm.name(), "hello-ipc-shared-memory-2");
+  EXPECT_NE(shm.get()    , nullptr);
+  EXPECT_NE(*shm         , nullptr);
+  EXPECT_NE(shm.as<int>(), nullptr);
+
+  *static_cast<int *>(ipc::shm_get(*shm_r)) = 1234;
+  *shm.as<int>() = 4444;
+  EXPECT_EQ(*static_cast<int *>(ipc::shm_get(*shm_r)), 1234);
+  EXPECT_EQ(*shm.as<int>(), 4444);
+
+  EXPECT_TRUE(ipc::shm_close(*shm_r));
 }
\ No newline at end of file

From d15181fa499f0e15abf3427219332852e2356569 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 30 Oct 2022 16:15:33 +0800
Subject: [PATCH 079/272] fix: [imp] codecvt in win

---
 test/test_imp_codecvt.cpp | 23 +++++++++--------------
 1 file changed, 9 insertions(+), 14 deletions(-)

diff --git a/test/test_imp_codecvt.cpp b/test/test_imp_codecvt.cpp
index 2e8c8e49..b7e887e5 100644
--- a/test/test_imp_codecvt.cpp
+++ b/test/test_imp_codecvt.cpp
@@ -5,27 +5,22 @@
 #include "gtest/gtest.h"
 
 #include "libimp/codecvt.h"
-#include "libimp/countof.h"
 
 TEST(codecvt, cvt_cstr) {
-  char const *utf8 = "hello world, "
-                     "\xe4\xbd\xa0\xe5\xa5\xbd\xef\xbc"
-                     "\x8c\xe3\x81\x93\xe3\x82\x93\xe3"
-                     "\x81\xab\xe3\x81\xa1\xe3\x81\xaf";
-  char16_t const utf16[] = u"hello world, "
-                            "\u4f60\u597d\uff0c\u3053\u3093\u306b\u3061\u306f";
+  char const utf8[] = "hello world, 你好，こんにちは";
+  wchar_t const utf16[] = L"hello world, 你好，こんにちは";
   {
-    auto cvt_len = imp::cvt_cstr(utf8, std::strlen(utf8), (char16_t *)nullptr, 0);
+    auto cvt_len = imp::cvt_cstr(utf8, std::strlen(utf8), (wchar_t *)nullptr, 0);
     EXPECT_NE(cvt_len, 0);
-    std::u16string wstr(cvt_len, L'\0');
+    std::wstring wstr(cvt_len, L'\0');
     EXPECT_EQ(imp::cvt_cstr(utf8, std::strlen(utf8), &wstr[0], wstr.size()), cvt_len);
     EXPECT_EQ(wstr, utf16);
   }
   {
-    auto cvt_len = imp::cvt_cstr(utf16, imp::countof(utf16) - 1, (char *)nullptr, 0);
+    auto cvt_len = imp::cvt_cstr(utf16, std::wcslen(utf16), (char *)nullptr, 0);
     EXPECT_NE(cvt_len, 0);
     std::string str(cvt_len, '\0');
-    EXPECT_EQ(imp::cvt_cstr(utf16, imp::countof(utf16) - 1, &str[0], str.size()), cvt_len);
+    EXPECT_EQ(imp::cvt_cstr(utf16, std::wcslen(utf16), &str[0], str.size()), cvt_len);
     EXPECT_EQ(str, utf8);
   }
   {
@@ -36,9 +31,9 @@ TEST(codecvt, cvt_cstr) {
     EXPECT_EQ(str, utf8);
   }
   {
-    auto cvt_len = imp::cvt_cstr(utf16, imp::countof(utf16) - 1, (char16_t *)nullptr, 0);
-    EXPECT_EQ(cvt_len, imp::countof(utf16) - 1);
-    std::u16string wstr(cvt_len, u'\0');
+    auto cvt_len = imp::cvt_cstr(utf16, std::wcslen(utf16), (wchar_t *)nullptr, 0);
+    EXPECT_EQ(cvt_len, std::wcslen(utf16));
+    std::wstring wstr(cvt_len, u'\0');
     EXPECT_EQ(imp::cvt_cstr(utf16, cvt_len, &wstr[0], wstr.size()), cvt_len);
     EXPECT_EQ(wstr, utf16);
   }

From bde06d7b0d7584097afdf75ee77d3a1e33256241 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 30 Oct 2022 17:04:35 +0800
Subject: [PATCH 080/272] upd: [ipc] posix shm shouldn't ftruncate when st_size
 > 0

---
 src/libipc/platform/posix/shm_impl.h | 40 +++++++++++++++++++---------
 1 file changed, 28 insertions(+), 12 deletions(-)

diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
index 13a320dd..f95f7e7e 100644
--- a/src/libipc/platform/posix/shm_impl.h
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -5,6 +5,7 @@
 #pragma once
 
 #include <string>
+#include <memory>   // std::unique_ptr
 #include <cstddef>
 
 #include <sys/stat.h>
@@ -15,6 +16,7 @@
 
 #include "libimp/log.h"
 #include "libimp/system.h"
+#include "libimp/detect_plat.h"
 
 #include "libipc/shm.h"
 
@@ -70,21 +72,36 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
     log.error("shm_open fails. error = {}", sys::error());
     return {};
   }
+  LIBIMP_UNUSED auto guard = std::unique_ptr<int, void (*)(int *)>(&fd, [](int *pfd) {
+    if (pfd != nullptr) ::close(*pfd);
+  });
 
-  if (size == 0) {
-    /// @brief Try to get the size of this fd
-    struct stat st;
-    if (::fstat(fd, &st) == posix::failed) {
-      log.error("fstat fails. error = {}", sys::error());
+  /// @brief Try to get the size of this fd
+  struct stat st;
+  if (::fstat(fd, &st) == posix::failed) {
+    log.error("fstat fails. error = {}", sys::error());
+    ::shm_unlink(name.c_str());
+    return {};
+  }
+
+  /// @brief Truncate this fd to a specified length
+  auto ftruncate = [&log, &name](int fd, std::size_t size) {
+    if (::ftruncate(fd, size) != 0) {
+      log.error("ftruncate fails. error = {}", sys::error());
       ::shm_unlink(name.c_str());
-      return {};
+      return false;
     }
+    return true;
+  };
+
+  if (size == 0) {
     size = static_cast<std::size_t>(st.st_size);
-    /// @brief Truncate this fd to a specified length
-  } else if (::ftruncate(fd, size) != 0) {
-    log.error("ftruncate fails. error = {}", sys::error());
-    ::shm_unlink(name.c_str());
-    return {};
+    if (!ftruncate(fd, size)) return {};
+  } else if (st.st_size > 0) {
+    /// @remark Based on the actual size.
+    size = static_cast<std::size_t>(st.st_size);
+  } else { // st.st_size <= 0
+    if (!ftruncate(fd, size)) return {};
   }
 
   /// @brief Creates a new mapping in the virtual address space of the calling process.
@@ -94,7 +111,6 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
     ::shm_unlink(name.c_str());
     return {};
   }
-  ::close(fd);
   return new shm_handle{std::move(name), size, mem};
 }
 

From 26c5078d1b1a3573c1f84092e58377900ea04596 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 30 Oct 2022 17:09:55 +0800
Subject: [PATCH 081/272] upd: add [TBD] comment

---
 include/libimp/log.h | 2 +-
 include/libipc/shm.h | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index a88ed70d..bcca750f 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -130,7 +130,7 @@ class gripper {
       auto px = fmt("[{}][{:%Y-%m-%d %H:%M:%S}.{:03}][{}] ", types[enum_cast(l)], tp, ms, func_);
       printer_.output(l, std::move(px += fmt(std::forward<Fmt>(ft), std::forward<A>(args)...)));
     } catch (std::exception const &e) {
-      /// @brief [TBD] std::string constructor may throw an exception
+      /// @remark [TBD] std::string constructor may throw an exception
       printer_.output(level::failed, e.what());
     }
     return *this;
diff --git a/include/libipc/shm.h b/include/libipc/shm.h
index 666ca18e..607cef00 100644
--- a/include/libipc/shm.h
+++ b/include/libipc/shm.h
@@ -35,6 +35,10 @@ LIBIMP_EXPORT void *shm_get(shm_t) noexcept;
 /// @return 0 on failure.
 LIBIMP_EXPORT std::size_t shm_size(shm_t) noexcept;
 
+/// @brief Sets the memory size based on the shared memory handle.
+/// @remark [TBD]
+LIBIMP_EXPORT ::LIBIMP_::result_code shm_size(shm_t, std::size_t) noexcept;
+
 /// @brief Gets the name of the shared memory file based on the shared memory handle.
 /// @return empty string on failure.
 LIBIMP_EXPORT std::string shm_name(shm_t) noexcept;

From 29eea871c26e763604d02d6e895e7eeaf56c9e15 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 30 Oct 2022 20:33:35 +0800
Subject: [PATCH 082/272] upd: .gitignore

---
 .gitignore | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index 9bca0610..a6a665e3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -43,7 +43,7 @@ target_wrapper.*
 CMakeLists.txt.user*
 
 # My output files
-build
+build*
 
 # vs
 .vs

From 0a88c53aeb9d9da41afde0d0f5985be327d22490 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 30 Oct 2022 20:37:12 +0800
Subject: [PATCH 083/272] upd: [imp] sys::error formatter

---
 include/libimp/system.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/libimp/system.h b/include/libimp/system.h
index 60d0d37c..0222b2ad 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -71,6 +71,6 @@ struct fmt::formatter<::LIBIMP_::sys::error>
           : formatter<std::string> {
   template <typename FormatContext>
   auto format(::LIBIMP_::sys::error r, FormatContext &ctx) {
-    return format_to(ctx.out(), "{}", ::LIBIMP_::sys::error_msg(r.code()));
+    return format_to(ctx.out(), ::LIBIMP_::sys::error_msg(r.code()));
   }
 };

From 94cae29b42b7c216f7afb2523736478ccf240f7a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 6 Nov 2022 17:39:08 +0800
Subject: [PATCH 084/272] upd: [imp] improve interface of result

---
 include/libimp/result.h              |   9 ++-
 src/libimp/result.cpp                |   5 +-
 src/libipc/platform/posix/def.h      |   1 +
 src/libipc/platform/posix/shm_impl.h | 102 ++++++++++++++++-----------
 src/libipc/platform/win/shm_impl.h   |   2 +-
 test/test_imp_result.cpp             |   6 +-
 6 files changed, 75 insertions(+), 50 deletions(-)

diff --git a/include/libimp/result.h b/include/libimp/result.h
index f27f0b3f..50972820 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -27,7 +27,8 @@ class LIBIMP_EXPORT result_code {
 
 public:
   result_code() noexcept;
-  result_code(bool ok, std::uint64_t value = {}) noexcept;
+  result_code(std::uint64_t value) noexcept;
+  result_code(bool ok, std::uint64_t value) noexcept;
 
   std::uint64_t value() const noexcept;
   bool ok() const noexcept;
@@ -103,7 +104,11 @@ class result<T, DefTraits, std::enable_if_t<std::is_integral<T>::value>> {
   using default_traits_t = DefTraits;
 
   result() noexcept = default;
-  result(bool ok, T value = default_traits_t::value()) noexcept
+
+  result(T value) noexcept
+    : result(true, std::move(value)) {}
+
+  result(bool ok, T value) noexcept
     : code_(ok, default_traits_t::cast_to_code(value)) {}
 
   T value() const noexcept { return default_traits_t::cast_from_code(code_.value()); }
diff --git a/src/libimp/result.cpp b/src/libimp/result.cpp
index e6f624b6..4036fe89 100644
--- a/src/libimp/result.cpp
+++ b/src/libimp/result.cpp
@@ -21,7 +21,10 @@ result_code_info info_cast(std::uint64_t status) noexcept {
 } // namespace
 
 result_code::result_code() noexcept
-  : result_code(false) {}
+  : result_code(false, {}) {}
+
+result_code::result_code(std::uint64_t value) noexcept
+  : result_code(true, value) {}
 
 result_code::result_code(bool ok, std::uint64_t code) noexcept
   : status_(make_status(ok, code)) {}
diff --git a/src/libipc/platform/posix/def.h b/src/libipc/platform/posix/def.h
index 10329357..d6c53b13 100644
--- a/src/libipc/platform/posix/def.h
+++ b/src/libipc/platform/posix/def.h
@@ -10,6 +10,7 @@ LIBIPC_NAMESPACE_BEG_
 namespace posix {
 
 enum : int {
+  succ   = 0,
   failed = -1,
 };
 
diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
index f95f7e7e..f5e23e6d 100644
--- a/src/libipc/platform/posix/shm_impl.h
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -31,13 +31,23 @@ struct shm_handle {
   void *memp;
 };
 
-/**
- * @see https://man7.org/linux/man-pages/man3/shm_open.3.html
- *      https://man7.org/linux/man-pages/man3/fstat.3p.html
- *      https://man7.org/linux/man-pages/man3/ftruncate.3p.html
- *      https://man7.org/linux/man-pages/man2/mmap.2.html
- */
-result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
+namespace {
+
+shm_handle *valid(shm_t h) noexcept {
+  LIBIMP_LOG_();
+  if (h == nullptr) {
+    log.error("shm handle is null.");
+    return nullptr;
+  }
+  auto shm = static_cast<shm_handle *>(h);
+  if (shm->memp == nullptr) {
+    log.error("memory pointer is null.");
+    return nullptr;
+  }
+  return shm;
+}
+
+result<int> shm_open_fd(std::string const &name, mode::type type) noexcept {
   LIBIMP_LOG_();
   if (name.empty()) {
     log.error("name is empty.");
@@ -48,7 +58,6 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   int flag = O_RDWR;
   switch (type) {
   case mode::open:
-    size = 0;
     break;
   // The check for the existence of the object, 
   // and its creation if it does not exist, are performed atomically.
@@ -65,50 +74,64 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   }
 
   /// @brief Create/Open POSIX shared memory bject
-  int fd = ::shm_open(name.c_str(), flag, S_IRUSR | S_IWUSR |
-                                          S_IRGRP | S_IWGRP |
-                                          S_IROTH | S_IWOTH);
-  if (fd == posix::failed) {
+  return ::shm_open(name.c_str(), flag, S_IRUSR | S_IWUSR |
+                                        S_IRGRP | S_IWGRP |
+                                        S_IROTH | S_IWOTH);
+}
+
+result_code ftruncate_fd(int fd, std::size_t size) noexcept {
+  LIBIMP_LOG_();
+  /// @see https://man7.org/linux/man-pages/man3/ftruncate.3p.html
+  if (::ftruncate(fd, size) != posix::succ) {
+    auto err = sys::error();
+    log.error("ftruncate({}, {}) fails. error = {}", fd, size, err);
+    return err.code();
+  }
+  return {posix::succ};
+}
+
+} // namespace
+
+/**
+ * @see https://man7.org/linux/man-pages/man3/shm_open.3.html
+ *      https://man7.org/linux/man-pages/man3/fstat.3p.html
+ *      https://man7.org/linux/man-pages/man2/mmap.2.html
+ */
+result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
+  LIBIMP_LOG_();
+  auto fd = shm_open_fd(name, type);
+  if (!fd) return {};
+  if (*fd == posix::failed) {
     log.error("shm_open fails. error = {}", sys::error());
     return {};
   }
-  LIBIMP_UNUSED auto guard = std::unique_ptr<int, void (*)(int *)>(&fd, [](int *pfd) {
-    if (pfd != nullptr) ::close(*pfd);
-  });
+  LIBIMP_UNUSED auto guard = std::unique_ptr<decltype(fd), void (*)(decltype(fd) *)> {
+    &fd, [](decltype(fd) *pfd) {
+      if (pfd != nullptr) ::close(**pfd);
+    }};
 
   /// @brief Try to get the size of this fd
   struct stat st;
-  if (::fstat(fd, &st) == posix::failed) {
+  if (::fstat(*fd, &st) == posix::failed) {
     log.error("fstat fails. error = {}", sys::error());
-    ::shm_unlink(name.c_str());
     return {};
   }
 
   /// @brief Truncate this fd to a specified length
-  auto ftruncate = [&log, &name](int fd, std::size_t size) {
-    if (::ftruncate(fd, size) != 0) {
-      log.error("ftruncate fails. error = {}", sys::error());
-      ::shm_unlink(name.c_str());
-      return false;
-    }
-    return true;
-  };
-
   if (size == 0) {
     size = static_cast<std::size_t>(st.st_size);
-    if (!ftruncate(fd, size)) return {};
+    if (!ftruncate_fd(*fd, size)) return {};
   } else if (st.st_size > 0) {
     /// @remark Based on the actual size.
     size = static_cast<std::size_t>(st.st_size);
   } else { // st.st_size <= 0
-    if (!ftruncate(fd, size)) return {};
+    if (!ftruncate_fd(*fd, size)) return {};
   }
 
   /// @brief Creates a new mapping in the virtual address space of the calling process.
-  void *mem = ::mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+  void *mem = ::mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_SHARED, *fd, 0);
   if (mem == MAP_FAILED) {
     log.error("mmap fails. error = {}", sys::error());
-    ::shm_unlink(name.c_str());
     return {};
   }
   return new shm_handle{std::move(name), size, mem};
@@ -119,23 +142,16 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
  */
 result_code shm_close(shm_t h) noexcept {
   LIBIMP_LOG_();
-  if (h == nullptr) {
-    log.error("shm handle is null.");
-    return {};
-  }
-  auto shm = static_cast<shm_handle *>(h);
-  if (shm->memp == nullptr) {
-    log.error("memory pointer is null.");
-    return {};
-  }
+  auto shm = valid(h);
+  if (shm == nullptr) return {};
   if (::munmap(shm->memp, shm->f_sz) == posix::failed) {
-    auto ec = sys::error_code();
-    log.error("munmap fails. error = {}", sys::error(ec));
-    return ec;
+    auto err = sys::error();
+    log.error("munmap({}, {}) fails. error = {}", shm->memp, shm->f_sz, err);
+    return err.code();
   }
   /// @brief no unlink the file.
   delete shm;
-  return {true};
+  return {posix::succ};
 }
 
 LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index 0df9a8f1..bda8d92e 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -40,7 +40,7 @@ result_code shm_close(shm_t h) noexcept {
   auto shm = static_cast<shm_handle *>(h);
   mmap_release(shm->h_fmap, shm->memp);
   delete shm;
-  return {true};
+  return {0};
 }
 
 LIBIPC_NAMESPACE_END_
diff --git a/test/test_imp_result.cpp b/test/test_imp_result.cpp
index 87f9cd4e..82304692 100644
--- a/test/test_imp_result.cpp
+++ b/test/test_imp_result.cpp
@@ -12,7 +12,7 @@ TEST(result, ok) {
   EXPECT_FALSE(ret.ok());
   EXPECT_EQ(ret.value(), 0);
 
-  ret = {true};
+  ret = {true, 0};
   EXPECT_TRUE(ret);
   EXPECT_TRUE(ret.ok());
   EXPECT_EQ(ret.value(), 0);
@@ -29,7 +29,7 @@ TEST(result, code) {
   EXPECT_TRUE(ret.ok());
   EXPECT_EQ(ret.value(), 1234);
 
-  ret = {false};
+  ret = {false, 0};
   EXPECT_FALSE(ret);
   EXPECT_FALSE(ret.ok());
   EXPECT_EQ(ret.value(), 0);
@@ -62,7 +62,7 @@ TEST(result, fmt) {
     EXPECT_EQ(fmt::format("{}", r1), "[fail, value = 0]");
     imp::result_code r2(true, 65537);
     EXPECT_EQ(fmt::format("{}", r2), "[succ, value = 65537]");
-    imp::result_code r3(true);
+    imp::result_code r3(0);
     EXPECT_EQ(fmt::format("{}", r3), "[succ, value = 0]");
   }
   {

From 375c25bd1ee445ddf97c5eb3a40f6db753cc2e23 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 6 Nov 2022 17:57:07 +0800
Subject: [PATCH 085/272] upd: [imp] improve interface of system

---
 include/libimp/system.h            |  2 +-
 src/libimp/platform/posix/system.h | 17 +++++++++++------
 test/test_imp_system.cpp           |  4 +++-
 3 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/include/libimp/system.h b/include/libimp/system.h
index 0222b2ad..dbff5997 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -61,7 +61,7 @@ class LIBIMP_EXPORT error {
 enum class info : std::int32_t {
   page_size,
 };
-LIBIMP_EXPORT std::int64_t conf(info) noexcept;
+LIBIMP_EXPORT result<std::int64_t> conf(info) noexcept;
 
 } // namespace sys
 LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index 3f5f33d5..f0e285b1 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -14,13 +14,17 @@
 LIBIMP_NAMESPACE_BEG_
 namespace sys {
 
+#ifndef ENOERR
+#define ENOERR (0)
+#endif
+
 /**
  * @brief Get the system error code
  * https://man7.org/linux/man-pages/man3/errno.3.html
  */
 result_code error_code() noexcept {
   auto err = errno;
-  if (err == 0) return {true};
+  if (err == ENOERR) return {ENOERR};
   return {false, std::uint64_t(err)};
 }
 
@@ -29,7 +33,7 @@ result_code error_code() noexcept {
  * https://man7.org/linux/man-pages/man3/errno.3.html
  */
 void error_code(result_code code) noexcept {
-  errno = code ? 0 : (int)code.value();
+  errno = code ? ENOERR : (int)code.value();
 }
 
 /**
@@ -56,7 +60,7 @@ std::string error_str(result_code code) noexcept {
  * https://man7.org/linux/man-pages/man2/getpagesize.2.html
  * https://man7.org/linux/man-pages/man3/sysconf.3.html
  */
-std::int64_t conf(info r) noexcept {
+result<std::int64_t> conf(info r) noexcept {
   LIBIMP_LOG_();
   switch (r) {
   case info::page_size: {
@@ -66,10 +70,11 @@ std::int64_t conf(info r) noexcept {
   }
   default:
     log.error("invalid info = {}", enum_cast(r));
-    return -1;
+    return {};
   }
-  log.error("info = {}, error = {}", enum_cast(r), error_msg(error_code()));
-  return -1;
+  auto err = sys::error();
+  log.error("info = {}, error = {}", enum_cast(r), err);
+  return {false, (int)err.value()};
 }
 
 } // namespace sys
diff --git a/test/test_imp_system.cpp b/test/test_imp_system.cpp
index ff8832e6..d4128ed9 100644
--- a/test/test_imp_system.cpp
+++ b/test/test_imp_system.cpp
@@ -67,5 +67,7 @@ TEST(system, error_str) {
 }
 
 TEST(system, conf) {
-  EXPECT_EQ(imp::sys::conf(imp::sys::info::page_size), 4096);
+  auto ret = imp::sys::conf(imp::sys::info::page_size);
+  EXPECT_TRUE(ret);
+  EXPECT_EQ(ret.value(), 4096);
 }
\ No newline at end of file

From 03dce063f933a40d2f1e74503b99bc3768b0bf2d Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 6 Nov 2022 18:22:36 +0800
Subject: [PATCH 086/272] upd: [ipc] allow shm error codes to be passed out

---
 include/libimp/result.h             | 32 +++++++-------
 src/libimp/platform/win/system.h    |  8 ++--
 src/libipc/platform/win/mmap_impl.h | 65 ++++++++++++++++-------------
 src/libipc/platform/win/shm_impl.h  | 22 ++++++----
 4 files changed, 74 insertions(+), 53 deletions(-)

diff --git a/include/libimp/result.h b/include/libimp/result.h
index 50972820..d4c3bb2f 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -17,23 +17,25 @@
 
 LIBIMP_NAMESPACE_BEG_
 
+using result_type = std::uint64_t;
+
 /**
  * @brief Use the least significant (in Little-Endian) of 
  * a 64-bit unsigned integer to indicate success or failure,
  * so the data significant bit cannot exceed 63 bits.
  */
 class LIBIMP_EXPORT result_code {
-  std::uint64_t status_;
+  result_type status_;
 
 public:
   result_code() noexcept;
-  result_code(std::uint64_t value) noexcept;
-  result_code(bool ok, std::uint64_t value) noexcept;
+  result_code(result_type value) noexcept;
+  result_code(bool ok, result_type value) noexcept;
 
-  std::uint64_t value() const noexcept;
+  result_type value() const noexcept;
   bool ok() const noexcept;
 
-  std::uint64_t operator*() const noexcept {
+  result_type operator*() const noexcept {
     return value();
   }
   explicit operator bool() const noexcept {
@@ -62,10 +64,10 @@ template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
   constexpr static T value() noexcept { return 0; }
 
-  static std::uint64_t cast_to_code(T value) noexcept {
-    return static_cast<std::uint64_t>(value);
+  static result_type cast_to_code(T value) noexcept {
+    return static_cast<result_type>(value);
   }
-  static T cast_from_code(std::uint64_t code) noexcept {
+  static T cast_from_code(result_type code) noexcept {
     return static_cast<T>(code);
   }
   template <typename Out>
@@ -78,10 +80,10 @@ template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
   constexpr static T value() noexcept { return nullptr; }
 
-  static std::uint64_t cast_to_code(T value) noexcept {
-    return reinterpret_cast<std::uint64_t>(value);
+  static result_type cast_to_code(T value) noexcept {
+    return reinterpret_cast<result_type>(value);
   }
-  static T cast_from_code(std::uint64_t code) noexcept {
+  static T cast_from_code(result_type code) noexcept {
     return reinterpret_cast<T>(code);
   }
   template <typename Out>
@@ -89,7 +91,7 @@ struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
     if LIBIMP_LIKELY(r) {
       return format_to(out, "{}", static_cast<void *>(*r));
     }
-    return format_to(out, "{}, code = {}", static_cast<void *>(*r), r.code());
+    return format_to(out, "{}, code = {}", static_cast<void *>(*r), r.code_value());
   }
 };
 
@@ -137,12 +139,12 @@ class result<T, DefTraits, std::enable_if_t<std::is_pointer<T>::value>> {
     : code_(default_traits_t::value() != value, 
             default_traits_t::cast_to_code(value)) {}
 
-  result(std::nullptr_t, std::uint64_t code) noexcept
+  result(std::nullptr_t, result_type code) noexcept
     : code_(false, code) {}
 
   T value() const noexcept { return code_.ok() ? default_traits_t::cast_from_code(code_.value()) : nullptr; }
   bool ok() const noexcept { return code_.ok(); }
-  std::uint64_t code() const noexcept { return code_.value(); }
+  result_type code_value() const noexcept { return code_.value(); }
 
   T operator*() const noexcept {
     return value();
@@ -171,7 +173,7 @@ struct fmt::formatter<::LIBIMP_::result<T, D>> {
 
 template <>
 struct fmt::formatter<::LIBIMP_::result_code>
-          : formatter<::LIBIMP_::result<std::uint64_t>> {
+          : formatter<::LIBIMP_::result<::LIBIMP_::result_type>> {
   template <typename FormatContext>
   auto format(::LIBIMP_::result_code r, FormatContext &ctx) {
     return format_to(ctx.out(), "[{}, value = {}]", (r ? "succ" : "fail"), *r);
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index 9fac9393..6ad86a6c 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -25,7 +25,9 @@ namespace sys {
  */
 result_code error_code() noexcept {
   auto err = ::GetLastError();
-  if (err == ERROR_SUCCESS) return {true};
+  if (err == ERROR_SUCCESS) {
+    return {ERROR_SUCCESS};
+  }
   return {false, std::uint64_t(err)};
 }
 
@@ -82,7 +84,7 @@ std::string error_str(result_code code) noexcept {
  * https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsysteminfo
  * https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getnativesysteminfo
  */
-std::int64_t conf(info r) noexcept {
+result<std::int64_t> conf(info r) noexcept {
   LIBIMP_LOG_();
   switch (r) {
   case info::page_size: {
@@ -92,7 +94,7 @@ std::int64_t conf(info r) noexcept {
   }
   default:
     log.error("invalid info = {}", enum_cast(r));
-    return -1;
+    return {};
   }
 }
 
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index 3b199522..8d0d4bad 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -33,15 +33,18 @@ namespace {
  * @brief Closes an open object handle.
  * @see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
  */
-void mmap_close(HANDLE h) {
+result_code mmap_close(HANDLE h) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
-    return;
+    return {};
   }
   if (!::CloseHandle(h)) {
-    log.error("CloseHandle fails. error = {}", sys::error());
+    auto err = sys::error();
+    log.error("CloseHandle({}) fails. error = {}", h, err);
+    return err.code();
   }
+  return {ERROR_SUCCESS};
 }
 
 /**
@@ -57,35 +60,38 @@ void mmap_close(HANDLE h) {
  * 
  * @return File mapping object HANDLE, NULL on error
  */
-HANDLE mmap_open(std::string const &file, std::size_t size, mode::type type) noexcept {
+result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type type) noexcept {
   LIBIMP_LOG_();
   if (file.empty()) {
     log.error("file name is empty.");
-    return NULL;
+    return {};
   }
   auto t_name = detail::to_tstring(file);
   if (t_name.empty()) {
     log.error("file name is empty. (TCHAR conversion failed)");
-    return NULL;
+    return {};
   }
 
   /// @brief Opens a named file mapping object.
-  auto try_open = [&]() -> HANDLE {
+  auto try_open = [&]() -> result<HANDLE> {
     HANDLE h = ::OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, t_name.c_str());
     if (h == NULL) {
-      log.error("OpenFileMapping fails. error = {}", sys::error());
+      auto err = sys::error();
+      log.error("OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, {}) fails. error = {}", file, err);
+      return {nullptr, err.value()};
     }
     return h;
   };
 
   /// @brief Creates or opens a named or unnamed file mapping object for a specified file.
-  auto try_create = [&]() -> HANDLE {
+  auto try_create = [&]() -> result<HANDLE> {
     HANDLE h = ::CreateFileMapping(INVALID_HANDLE_VALUE, detail::get_sa(), PAGE_READWRITE | SEC_COMMIT,
                                    /// @remark dwMaximumSizeHigh always 0 here.
                                    0, static_cast<DWORD>(size), t_name.c_str());
     if (h == NULL) {
-      log.error("CreateFileMapping fails. error = {}", sys::error());
-      return NULL;
+      auto err = sys::error();
+      log.error("CreateFileMapping(PAGE_READWRITE | SEC_COMMIT, {}, {}) fails. error = {}", size, file, err);
+      return {nullptr, err.value()};
     }
     return h;
   };
@@ -99,15 +105,16 @@ HANDLE mmap_open(std::string const &file, std::size_t size, mode::type type) noe
     return try_open();
   } else if (!(type & mode::create)) {
     log.error("mode type is invalid. type = {}", type);
-    return NULL;
+    return {};
   }
-  HANDLE h = try_create();
+  auto h = try_create();
+  if (!h) return h;
   /// @remark If the object exists before the function call, the function returns a handle to the existing object
   ///         (with its current size, not the specified size), and GetLastError returns ERROR_ALREADY_EXISTS.
   if ((type == mode::create) && (::GetLastError() == ERROR_ALREADY_EXISTS)) {
-    mmap_close(h);
     log.info("the file being created already exists. file = {}, type = {}", file, type);
-    return NULL;
+    mmap_close(*h);
+    return {};
   }
   return h;
 }
@@ -116,16 +123,17 @@ HANDLE mmap_open(std::string const &file, std::size_t size, mode::type type) noe
  * @brief Maps a view of a file mapping into the address space of a calling process.
  * @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-mapviewoffile
  */
-LPVOID mmap_memof(HANDLE h) {
+result<LPVOID> mmap_memof(HANDLE h) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
-    return NULL;
+    return {};
   }
   LPVOID mem = ::MapViewOfFile(h, FILE_MAP_ALL_ACCESS, 0, 0, 0);
-  if (h == NULL) {
-    log.error("MapViewOfFile fails. error = {}", sys::error());
-    return NULL;
+  if (mem == NULL) {
+    auto err = sys::error();
+    log.error("MapViewOfFile({}, FILE_MAP_ALL_ACCESS) fails. error = {}", h, err);
+    return {nullptr, err.value()};
   }
   return mem;
 }
@@ -134,16 +142,17 @@ LPVOID mmap_memof(HANDLE h) {
  * @brief Retrieves the size about a range of pages in the virtual address space of the calling process.
  * @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-virtualquery
  */
-SIZE_T mmap_sizeof(LPCVOID mem) {
+result<SIZE_T> mmap_sizeof(LPCVOID mem) {
   LIBIMP_LOG_();
   if (mem == NULL) {
     log.error("memory pointer is null.");
-    return 0;
+    return {};
   }
   MEMORY_BASIC_INFORMATION mem_info {};
   if (::VirtualQuery(mem, &mem_info, sizeof(mem_info)) == 0) {
-    log.error("VirtualQuery fails. error = {}", sys::error());
-    return 0;
+    auto err = sys::error();
+    log.error("VirtualQuery({}) fails. error = {}", mem, err);
+    return {false, (SIZE_T)err.value()};
   }
   return mem_info.RegionSize;
 }
@@ -152,20 +161,20 @@ SIZE_T mmap_sizeof(LPCVOID mem) {
  * @brief Unmaps a mapped view of a file from the calling process's address space.
  * @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-unmapviewoffile
  */
-void mmap_release(HANDLE h, LPCVOID mem) {
+result_code mmap_release(HANDLE h, LPCVOID mem) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
-    return;
+    return {};
   }
   if (mem == NULL) {
     log.error("memory pointer is null.");
-    return;
+    return {};
   }
   if (!::UnmapViewOfFile(mem)) {
     log.warning("UnmapViewOfFile fails. error = {}", sys::error());
   }
-  mmap_close(h);
+  return mmap_close(h);
 }
 
 } // namespace
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index bda8d92e..fa23f462 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -22,13 +22,21 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   auto h = mmap_open(name, size, type);
   if (h == NULL) {
     log.error("mmap_open failed.");
-    return {nullptr, *sys::error_code()};
+    return {nullptr, h.code_value()};
   }
-  auto mem = mmap_memof(h);
-  if (mem == NULL) {
-    log.warning("mmap_memof failed.");
+  auto mem = mmap_memof(*h);
+  if (*mem == NULL) {
+    log.error("mmap_memof failed.");
+    mmap_close(*h);
+    return {nullptr, mem.code_value()};
   }
-  return new shm_handle{std::move(name), mmap_sizeof(mem), mem, h};
+  auto sz = mmap_sizeof(*mem);
+  if (!sz) {
+    log.error("mmap_sizeof failed.");
+    mmap_close(*h);
+    return {nullptr, static_cast<result_type>(sz.value())};
+  }
+  return new shm_handle{std::move(name), *sz, *mem, *h};
 }
 
 result_code shm_close(shm_t h) noexcept {
@@ -38,9 +46,9 @@ result_code shm_close(shm_t h) noexcept {
     return {};
   }
   auto shm = static_cast<shm_handle *>(h);
-  mmap_release(shm->h_fmap, shm->memp);
+  auto ret = mmap_release(shm->h_fmap, shm->memp);
   delete shm;
-  return {0};
+  return ret;
 }
 
 LIBIPC_NAMESPACE_END_

From 8e40adc1f17529ef56739fb5dc6b892710de519b Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 7 Nov 2022 21:29:19 +0800
Subject: [PATCH 087/272] add: [ipc] concurrent (TBD)

---
 include/libimp/construct.h   |  2 ++
 include/libipc/def.h         | 17 ++++++++++++++++-
 src/libipc/concurrent.h      | 26 ++++++++++++++++++++++++++
 test/test_ipc_concurrent.cpp | 16 ++++++++++++++++
 4 files changed, 60 insertions(+), 1 deletion(-)
 create mode 100644 src/libipc/concurrent.h
 create mode 100644 test/test_ipc_concurrent.cpp

diff --git a/include/libimp/construct.h b/include/libimp/construct.h
index 4b485b11..8d39dd7f 100644
--- a/include/libimp/construct.h
+++ b/include/libimp/construct.h
@@ -45,6 +45,7 @@ auto construct(void *p, A &&... args)
 
 template <typename T>
 void *destroy(T *p) noexcept {
+  if (p == nullptr) return nullptr;
 #if defined(LIBIMP_CPP_17)
   std::destroy_at(p);
 #else
@@ -55,6 +56,7 @@ void *destroy(T *p) noexcept {
 
 template <typename T, std::size_t N>
 void *destroy(T (*p)[N]) noexcept {
+  if (p == nullptr) return nullptr;
 #if defined(LIBIMP_CPP_20)
   std::destroy_at(p);
 #elif defined(LIBIMP_CPP_17)
diff --git a/include/libipc/def.h b/include/libipc/def.h
index 0561ffe5..66901558 100755
--- a/include/libipc/def.h
+++ b/include/libipc/def.h
@@ -6,8 +6,11 @@
  */
 #pragma once
 
-#include <cstddef>
+#include <cstddef>  // std::max_align_t
 #include <cstdint>
+#include <new>      // std::hardware_destructive_interference_size
+
+#include "libimp/detect_plat.h"
 
 #define LIBIPC_               ipc
 #define LIBIPC_NAMESPACE_BEG_ namespace LIBIPC_ {
@@ -35,4 +38,16 @@ struct mode {
   };
 };
 
+enum : std::size_t {
+  /// @brief Minimum offset between two objects to avoid false sharing.
+  /// @see https://en.cppreference.com/w/cpp/thread/hardware_destructive_interference_size
+  cache_line_size =
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_hardware_interference_size)
+    ( std::hardware_destructive_interference_size < alignof(std::max_align_t) ) ? 64 
+    : std::hardware_destructive_interference_size,
+#else
+    64,
+#endif
+};
+
 LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/concurrent.h b/src/libipc/concurrent.h
new file mode 100644
index 00000000..b7371db3
--- /dev/null
+++ b/src/libipc/concurrent.h
@@ -0,0 +1,26 @@
+
+#include <cstdint>
+#include <limits>
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+namespace concurrent {
+
+/// @brief The queue index type.
+using index_t = std::uint32_t;
+
+namespace state {
+
+/// @brief The state flag type for the queue element.
+using flag_t = std::uint64_t;
+
+enum : flag_t {
+  /// @brief The invalid state value.
+  invalid_value = (std::numeric_limits<flag_t>::max)(),
+};
+
+} // namespace state
+
+} // namespace concurrent
+LIBIPC_NAMESPACE_END_
diff --git a/test/test_ipc_concurrent.cpp b/test/test_ipc_concurrent.cpp
new file mode 100644
index 00000000..45cb1b64
--- /dev/null
+++ b/test/test_ipc_concurrent.cpp
@@ -0,0 +1,16 @@
+
+#include <iostream>
+#include <cstddef>
+
+#include "gtest/gtest.h"
+
+#include "libipc/concurrent.h"
+
+TEST(concurrent, cache_line_size) {
+  std::cout << ipc::cache_line_size << "\n";
+  EXPECT_TRUE(ipc::cache_line_size >= alignof(std::max_align_t));
+}
+
+TEST(concurrent, index_and_flag) {
+  EXPECT_TRUE(sizeof(ipc::concurrent::index_t) < sizeof(ipc::concurrent::state::flag_t));
+}
\ No newline at end of file

From 2e0f074287943558e9eb6ba225d7277896191fbf Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 7 Nov 2022 22:57:20 +0800
Subject: [PATCH 088/272] add: [concur] define concurrent algorithms separately

---
 .../libipc => include/libconcur}/concurrent.h | 15 +++++---
 include/libconcur/def.h                       | 34 +++++++++++++++++++
 include/libipc/def.h                          | 19 ++---------
 test/test_concur_concurrent.cpp               | 16 +++++++++
 test/test_ipc_concurrent.cpp                  | 16 ---------
 5 files changed, 62 insertions(+), 38 deletions(-)
 rename {src/libipc => include/libconcur}/concurrent.h (58%)
 create mode 100644 include/libconcur/def.h
 create mode 100644 test/test_concur_concurrent.cpp
 delete mode 100644 test/test_ipc_concurrent.cpp

diff --git a/src/libipc/concurrent.h b/include/libconcur/concurrent.h
similarity index 58%
rename from src/libipc/concurrent.h
rename to include/libconcur/concurrent.h
index b7371db3..d0fb83da 100644
--- a/src/libipc/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -1,11 +1,17 @@
+/**
+ * @file libconcur/concurrent.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define different policies for concurrent queue
+ * @date 2022-11-07
+ */
+#pragma once
 
 #include <cstdint>
 #include <limits>
 
-#include "libipc/def.h"
+#include "libconcur/def.h"
 
-LIBIPC_NAMESPACE_BEG_
-namespace concurrent {
+LIBCONCUR_NAMESPACE_BEG_
 
 /// @brief The queue index type.
 using index_t = std::uint32_t;
@@ -22,5 +28,4 @@ enum : flag_t {
 
 } // namespace state
 
-} // namespace concurrent
-LIBIPC_NAMESPACE_END_
+LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/def.h b/include/libconcur/def.h
new file mode 100644
index 00000000..4faf35e1
--- /dev/null
+++ b/include/libconcur/def.h
@@ -0,0 +1,34 @@
+/**
+ * @file libconcur/def.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define the trivial configuration information for concurrency
+ * @date 2022-11-07
+ */
+#pragma once
+
+#include <cstddef>  // std::max_align_t
+#include <new>      // std::hardware_destructive_interference_size
+
+#include "libimp/detect_plat.h"
+
+#define LIBCONCUR_               concur
+#define LIBCONCUR_NAMESPACE_BEG_ namespace LIBCONCUR_ {
+#define LIBCONCUR_NAMESPACE_END_ }
+
+LIBCONCUR_NAMESPACE_BEG_
+
+/// @brief Constants.
+
+enum : std::size_t {
+  /// @brief Minimum offset between two objects to avoid false sharing.
+  /// @see https://en.cppreference.com/w/cpp/thread/hardware_destructive_interference_size
+  cache_line_size =
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_hardware_interference_size)
+    ( std::hardware_destructive_interference_size < alignof(std::max_align_t) ) ? 64 
+    : std::hardware_destructive_interference_size,
+#else
+    64,
+#endif
+};
+
+LIBCONCUR_NAMESPACE_END_
diff --git a/include/libipc/def.h b/include/libipc/def.h
index 66901558..f02ee8dc 100755
--- a/include/libipc/def.h
+++ b/include/libipc/def.h
@@ -6,11 +6,8 @@
  */
 #pragma once
 
-#include <cstddef>  // std::max_align_t
+#include <cstddef>
 #include <cstdint>
-#include <new>      // std::hardware_destructive_interference_size
-
-#include "libimp/detect_plat.h"
 
 #define LIBIPC_               ipc
 #define LIBIPC_NAMESPACE_BEG_ namespace LIBIPC_ {
@@ -18,7 +15,7 @@
 
 LIBIPC_NAMESPACE_BEG_
 
-// constants
+/// @brief Constants.
 
 struct prot {
   using type = std::uint32_t;
@@ -38,16 +35,4 @@ struct mode {
   };
 };
 
-enum : std::size_t {
-  /// @brief Minimum offset between two objects to avoid false sharing.
-  /// @see https://en.cppreference.com/w/cpp/thread/hardware_destructive_interference_size
-  cache_line_size =
-#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_hardware_interference_size)
-    ( std::hardware_destructive_interference_size < alignof(std::max_align_t) ) ? 64 
-    : std::hardware_destructive_interference_size,
-#else
-    64,
-#endif
-};
-
 LIBIPC_NAMESPACE_END_
diff --git a/test/test_concur_concurrent.cpp b/test/test_concur_concurrent.cpp
new file mode 100644
index 00000000..df8e3a7e
--- /dev/null
+++ b/test/test_concur_concurrent.cpp
@@ -0,0 +1,16 @@
+
+#include <iostream>
+#include <cstddef>
+
+#include "gtest/gtest.h"
+
+#include "libconcur/concurrent.h"
+
+TEST(concurrent, cache_line_size) {
+  std::cout << concur::cache_line_size << "\n";
+  EXPECT_TRUE(concur::cache_line_size >= alignof(std::max_align_t));
+}
+
+TEST(concurrent, index_and_flag) {
+  EXPECT_TRUE(sizeof(concur::index_t) < sizeof(concur::state::flag_t));
+}
\ No newline at end of file
diff --git a/test/test_ipc_concurrent.cpp b/test/test_ipc_concurrent.cpp
deleted file mode 100644
index 45cb1b64..00000000
--- a/test/test_ipc_concurrent.cpp
+++ /dev/null
@@ -1,16 +0,0 @@
-
-#include <iostream>
-#include <cstddef>
-
-#include "gtest/gtest.h"
-
-#include "libipc/concurrent.h"
-
-TEST(concurrent, cache_line_size) {
-  std::cout << ipc::cache_line_size << "\n";
-  EXPECT_TRUE(ipc::cache_line_size >= alignof(std::max_align_t));
-}
-
-TEST(concurrent, index_and_flag) {
-  EXPECT_TRUE(sizeof(ipc::concurrent::index_t) < sizeof(ipc::concurrent::state::flag_t));
-}
\ No newline at end of file

From 15d89aed5c88b9498960bb4659d24b9973a9d0c6 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 12 Nov 2022 16:29:38 +0800
Subject: [PATCH 089/272] add: [imp] byte & ut

---
 include/libimp/byte.h                   | 169 ++++++++++++++++++++++++
 include/libimp/span.h                   |  37 +++++-
 test/CMakeLists.txt                     |   8 +-
 test/imp/test_imp_byte.cpp              |  65 +++++++++
 test/{ => imp}/test_imp_codecvt.cpp     |   0
 test/{ => imp}/test_imp_detect_plat.cpp |   0
 test/{ => imp}/test_imp_log.cpp         |   0
 test/{ => imp}/test_imp_result.cpp      |   0
 test/{ => imp}/test_imp_span.cpp        |   7 +-
 test/{ => imp}/test_imp_system.cpp      |   0
 test/{ => imp}/test_imp_utility.cpp     |   0
 11 files changed, 276 insertions(+), 10 deletions(-)
 create mode 100644 include/libimp/byte.h
 create mode 100644 test/imp/test_imp_byte.cpp
 rename test/{ => imp}/test_imp_codecvt.cpp (100%)
 rename test/{ => imp}/test_imp_detect_plat.cpp (100%)
 rename test/{ => imp}/test_imp_log.cpp (100%)
 rename test/{ => imp}/test_imp_result.cpp (100%)
 rename test/{ => imp}/test_imp_span.cpp (87%)
 rename test/{ => imp}/test_imp_system.cpp (100%)
 rename test/{ => imp}/test_imp_utility.cpp (100%)

diff --git a/include/libimp/byte.h b/include/libimp/byte.h
new file mode 100644
index 00000000..89faeaa7
--- /dev/null
+++ b/include/libimp/byte.h
@@ -0,0 +1,169 @@
+/**
+ * @file libimp/byte.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define the byte type
+ * @date 2022-11-12
+ */
+#pragma once
+
+#include <type_traits>
+#include <cstdint>
+#include <cstddef>  // std::byte (since C++17)
+
+#include "fmt/format.h"
+
+#include "libimp/def.h"
+#include "libimp/detect_plat.h"
+
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_byte)
+#define LIBIMP_CPP_LIB_BYTE_
+#endif // __cpp_lib_byte
+
+LIBIMP_NAMESPACE_BEG_
+
+class byte;
+
+namespace detail {
+
+template <typename T>
+using is_integral = 
+  typename std::enable_if<std::is_integral<T>::value>::type;
+
+template <typename T>
+using is_not_byte = 
+  typename std::enable_if<!std::is_same<
+  typename std::remove_cv<T>::type, byte>::value>::type;
+
+} // namespace detail
+
+/**
+ * @brief A distinct type that implements the concept of byte as specified in the C++ language definition.
+ * @see https://en.cppreference.com/w/cpp/types/byte
+ */
+class byte {
+  std::uint8_t bits_;
+
+public:
+  constexpr byte() noexcept
+    : byte(0) {}
+  
+  template <typename T, typename = detail::is_integral<T>>
+  constexpr byte(T v) noexcept
+    : bits_(static_cast<std::uint8_t>(v)) {}
+
+#ifdef LIBIMP_CPP_LIB_BYTE_
+  constexpr byte(std::byte b) noexcept
+    : byte(std::to_integer<std::uint8_t>(b)) {}
+#endif // LIBIMP_CPP_LIB_BYTE_
+
+  template <typename T, typename = detail::is_integral<T>>
+  explicit constexpr operator T() const noexcept {
+    return static_cast<T>(bits_);
+  }
+
+#ifdef LIBIMP_CPP_LIB_BYTE_
+  explicit constexpr operator std::byte() const noexcept {
+    /// @brief C++17 relaxed enum class initialization rules.
+    /// @see https://en.cppreference.com/w/cpp/language/enum#enum_relaxed_init_cpp17
+    return std::byte{bits_};
+  }
+#endif // LIBIMP_CPP_LIB_BYTE_
+
+  friend bool operator==(byte const &lhs, byte const &rhs) noexcept {
+    return lhs.bits_ == rhs.bits_;
+  }
+
+  friend bool operator!=(byte const &lhs, byte const &rhs) noexcept {
+    return !(lhs == rhs);
+  }
+};
+
+/**
+ * @brief Non-member functions.
+ */
+
+template <typename T, typename = detail::is_integral<T>>
+constexpr T to_integer(byte b) noexcept {
+  return T(b);
+}
+
+/// @brief std::operator<<, operator>>
+
+template <typename T, typename = detail::is_integral<T>>
+constexpr byte operator<<(byte b, T shift) noexcept {
+  return byte(to_integer<unsigned>(b) << shift);
+}
+
+template <typename T, typename = detail::is_integral<T>>
+constexpr byte operator>>(byte b, T shift) noexcept {
+  return byte(to_integer<unsigned>(b) >> shift);
+}
+
+/// @brief std::operator<<=, operator>>=
+
+template <typename T, typename = detail::is_integral<T>>
+constexpr byte &operator<<=(byte &b, T shift) noexcept {
+  return b = b << shift;
+}
+
+template <typename T, typename = detail::is_integral<T>>
+constexpr byte &operator>>=(byte &b, T shift) noexcept {
+  return b = b >> shift;
+}
+
+/// @brief std::operator|, operator&, operator^, operator~
+
+constexpr byte operator|(byte l, byte r) noexcept { return byte(to_integer<unsigned>(l) | to_integer<unsigned>(r)); }
+constexpr byte operator&(byte l, byte r) noexcept { return byte(to_integer<unsigned>(l) & to_integer<unsigned>(r)); }
+constexpr byte operator^(byte l, byte r) noexcept { return byte(to_integer<unsigned>(l) ^ to_integer<unsigned>(r)); }
+constexpr byte operator~(byte b)         noexcept { return byte(~to_integer<unsigned>(b)); }
+
+/// @brief std::operator|=, operator&=, operator^=
+
+constexpr byte &operator|=(byte &l, byte r) noexcept { return l = l | r; }
+constexpr byte &operator&=(byte &l, byte r) noexcept { return l = l & r; }
+constexpr byte &operator^=(byte &l, byte r) noexcept { return l = l ^ r; }
+
+/// @brief Cast pointer to byte*.
+
+template <typename T, typename = detail::is_not_byte<T>>
+byte *byte_cast(T *p) noexcept {
+  return reinterpret_cast<byte *>(p);
+}
+
+template <typename T, typename = detail::is_not_byte<T>>
+byte const *byte_cast(T const *p) noexcept {
+  return reinterpret_cast<byte const *>(p);
+}
+
+/// @brief Cast byte* to a pointer of another type.
+
+template <typename T, typename = detail::is_not_byte<T>>
+T *byte_cast(byte *p) noexcept {
+  if (reinterpret_cast<std::size_t>(p) % alignof(T) != 0) {
+    return nullptr;
+  }
+  return reinterpret_cast<T *>(p);
+}
+
+template <typename T, typename U = typename std::add_const<T>::type, 
+          typename = detail::is_not_byte<T>>
+U *byte_cast(byte const *p) noexcept {
+  if (reinterpret_cast<std::size_t>(p) % alignof(T) != 0) {
+    return nullptr;
+  }
+  return reinterpret_cast<U *>(p);
+}
+
+LIBIMP_NAMESPACE_END_
+
+template <>
+struct fmt::formatter<::LIBIMP_::byte> {
+  constexpr auto parse(format_parse_context& ctx) const {
+    return ctx.end();
+  }
+  template <typename FormatContext>
+  auto format(::LIBIMP_::byte b, FormatContext &ctx) {
+    return format_to(ctx.out(), "{:#04x}", static_cast<std::uint8_t>(b));
+  }
+};
diff --git a/include/libimp/span.h b/include/libimp/span.h
index d2596bb6..814c06e7 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -16,12 +16,17 @@
 #include <algorithm>
 #include <cstdint>
 #include <initializer_list>
-#ifdef LIBIMP_CPP_20
-#include <span>
-#endif // LIBIMP_CPP_20
+
+#include "fmt/format.h"
 
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
+#include "libimp/byte.h"
+
+#if defined(LIBIMP_CPP_20) && defined(__cpp_lib_span)
+#include <span>
+#define LIBIMP_CPP_LIB_SPAN_
+#endif // __cpp_lib_span
 
 LIBIMP_NAMESPACE_BEG_
 namespace detail {
@@ -138,13 +143,13 @@ class span {
     : ptr_   (s.data())
     , extent_(s.size()) {}
 
-#if defined(LIBIMP_CPP_20) || defined(__cpp_lib_span)
+#ifdef LIBIMP_CPP_LIB_SPAN_
   template <typename U, std::size_t E,
             typename = detail::is_array_convertible<U, T>>
   constexpr span(std::span<U, E> const &s) noexcept
     : ptr_   (s.data())
     , extent_(s.size()) {}
-#endif // LIBIMP_CPP_20
+#endif // LIBIMP_CPP_LIB_SPAN_
 
   constexpr size_type size() const noexcept {
     return extent_;
@@ -221,9 +226,9 @@ bool operator==(span<T> a, span<U> b) noexcept {
 /// @see https://en.cppreference.com/w/cpp/container/span/as_bytes
 
 template <typename T, 
-          typename Byte = typename std::conditional<std::is_const<T>::value, std::uint8_t const, std::uint8_t>::type>
+          typename Byte = typename std::conditional<std::is_const<T>::value, byte const, byte>::type>
 auto as_bytes(span<T> s) noexcept -> span<Byte> {
-  return {reinterpret_cast<Byte *>(s.data()), s.size_bytes()};
+  return {byte_cast(s.data()), s.size_bytes()};
 }
 
 /// @brief Constructs an object of type T and wraps it in a span.
@@ -274,3 +279,21 @@ inline auto make_span(std::string const &str) noexcept -> span<char const> {
 }
 
 LIBIMP_NAMESPACE_END_
+
+template <typename T>
+struct fmt::formatter<::LIBIMP_::span<T>> {
+  constexpr auto parse(format_parse_context& ctx) const {
+    return ctx.end();
+  }
+  template <typename FormatContext>
+  auto format(::LIBIMP_::span<T> s, FormatContext &ctx) {
+    if (s.empty()) {
+      return format_to(ctx.out(), "");
+    }
+    auto appender = format_to(ctx.out(), "{}", s[0]);
+    for (std::size_t i = 1; i < s.size(); ++i) {
+      appender = format_to(appender, " {}", s[i]);
+    }
+    return appender;
+  }
+};
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index d8c88ffe..3bc49f02 100755
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -13,8 +13,12 @@ include_directories(
   ${LIBIPC_PROJECT_DIR}/src
   ${LIBIPC_PROJECT_DIR}/test)
 
-file(GLOB SRC_FILES  ${LIBIPC_PROJECT_DIR}/test/*.cpp)
-file(GLOB HEAD_FILES ${LIBIPC_PROJECT_DIR}/test/*.h)
+file(GLOB SRC_FILES
+  ${LIBIPC_PROJECT_DIR}/test/imp/*.cpp
+  ${LIBIPC_PROJECT_DIR}/test/*.cpp)
+
+file(GLOB HEAD_FILES
+  ${LIBIPC_PROJECT_DIR}/test/*.h)
 
 add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
 
diff --git a/test/imp/test_imp_byte.cpp b/test/imp/test_imp_byte.cpp
new file mode 100644
index 00000000..ad2fd373
--- /dev/null
+++ b/test/imp/test_imp_byte.cpp
@@ -0,0 +1,65 @@
+
+#include "gtest/gtest.h"
+
+#include "libimp/byte.h"
+#include "libimp/span.h"
+
+TEST(byte, construct) {
+  {
+    imp::byte b;
+    EXPECT_EQ(int(b), 0);
+  }
+  {
+    imp::byte b {123};
+    EXPECT_EQ(int(b), 123);
+  }
+  {
+    imp::byte b {65535};
+    EXPECT_EQ(int(b), 255);
+    EXPECT_EQ(std::int8_t(b), -1);
+  }
+  {
+    imp::byte b {65536};
+    EXPECT_EQ(int(b), 0);
+  }
+}
+
+TEST(byte, compare) {
+  {
+    imp::byte b1, b2;
+    EXPECT_EQ(b1, b2);
+  }
+  {
+    imp::byte b1, b2(321);
+    EXPECT_NE(b1, b2);
+  }
+}
+
+TEST(byte, fmt) {
+  {
+    imp::byte b1, b2(31);
+    EXPECT_EQ(fmt::format("{}", b1), "0x00");
+    EXPECT_EQ(fmt::format("{}", b2), "0x1f");
+  }
+  {
+    imp::byte bs[] {31, 32, 33, 34, 35, 36, 37, 38};
+    EXPECT_EQ(fmt::format("{}", imp::make_span(bs)), 
+              "0x1f 0x20 0x21 0x22 0x23 0x24 0x25 0x26");
+  }
+}
+
+TEST(byte, byte_cast) {
+  int a = 654321;
+  int *pa = &a;
+
+  // int * => byte *
+  imp::byte *pb = imp::byte_cast(pa);
+  EXPECT_EQ((std::size_t)pb, (std::size_t)pa);
+
+  // byte * => int32_t *
+  std::int32_t *pc = imp::byte_cast<std::int32_t>(pb);
+  EXPECT_EQ(*pc, a);
+
+  // byte alignment check
+  EXPECT_EQ(imp::byte_cast<int>(pb + 1), nullptr);
+}
\ No newline at end of file
diff --git a/test/test_imp_codecvt.cpp b/test/imp/test_imp_codecvt.cpp
similarity index 100%
rename from test/test_imp_codecvt.cpp
rename to test/imp/test_imp_codecvt.cpp
diff --git a/test/test_imp_detect_plat.cpp b/test/imp/test_imp_detect_plat.cpp
similarity index 100%
rename from test/test_imp_detect_plat.cpp
rename to test/imp/test_imp_detect_plat.cpp
diff --git a/test/test_imp_log.cpp b/test/imp/test_imp_log.cpp
similarity index 100%
rename from test/test_imp_log.cpp
rename to test/imp/test_imp_log.cpp
diff --git a/test/test_imp_result.cpp b/test/imp/test_imp_result.cpp
similarity index 100%
rename from test/test_imp_result.cpp
rename to test/imp/test_imp_result.cpp
diff --git a/test/test_imp_span.cpp b/test/imp/test_imp_span.cpp
similarity index 87%
rename from test/test_imp_span.cpp
rename to test/imp/test_imp_span.cpp
index 0c7a4826..f49ae258 100644
--- a/test/test_imp_span.cpp
+++ b/test/imp/test_imp_span.cpp
@@ -41,7 +41,7 @@ TEST(span, span) {
     test_proc(imp::make_span({6, 7, 8, 9}), sp.last(4));
     test_proc(imp::make_span({3, 4, 5, 6}), sp.subspan(3, 4));
     test_proc(imp::make_span({3, 4, 5, 6, 7, 8, 9}), sp.subspan(3));
-    test_proc(imp::make_span((char *)sp.data(), sp.size_bytes()), imp::as_bytes(sp));
+    test_proc(imp::make_span((imp::byte *)sp.data(), sp.size_bytes()), imp::as_bytes(sp));
   }
   {
     std::string buf = "0123456789";
@@ -53,4 +53,9 @@ TEST(span, span) {
     test_proc(imp::make_span("3456", 4), sp.subspan(3, 4));
     test_proc(imp::make_span("3456789", 7), sp.subspan(3));
   }
+}
+
+TEST(span, fmt) {
+  EXPECT_EQ(fmt::format("{}", imp::span<int>{}), "");
+  EXPECT_EQ(fmt::format("{}", imp::make_span({1, 3, 2, 4, 5, 6, 7})), "1 3 2 4 5 6 7");
 }
\ No newline at end of file
diff --git a/test/test_imp_system.cpp b/test/imp/test_imp_system.cpp
similarity index 100%
rename from test/test_imp_system.cpp
rename to test/imp/test_imp_system.cpp
diff --git a/test/test_imp_utility.cpp b/test/imp/test_imp_utility.cpp
similarity index 100%
rename from test/test_imp_utility.cpp
rename to test/imp/test_imp_utility.cpp

From 6bd967323d89a9736174d1de9a59868c0ae2ae55 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 13 Nov 2022 18:54:18 +0800
Subject: [PATCH 090/272] add: [pmr] new_delete_resource & ut

---
 include/libconcur/concurrent.h        |   2 +-
 include/libconcur/def.h               |   2 +-
 include/libimp/byte.h                 |   2 +-
 include/libimp/def.h                  |   4 +-
 include/libimp/detect_plat.h          |  44 ++++++++--
 include/libipc/def.h                  |   2 +-
 include/libpmr/allocator.h            |  28 ++++++
 include/libpmr/def.h                  |  17 ++++
 include/libpmr/memory_resource.h      |  34 ++++++++
 src/CMakeLists.txt                    |   1 +
 src/libpmr/CMakeLists.txt             |  32 +++++++
 src/libpmr/memory_resource.cpp        | 117 ++++++++++++++++++++++++++
 test/CMakeLists.txt                   |   3 +-
 test/pmr/test_pmr_allocator.cpp       |   7 ++
 test/pmr/test_pmr_memory_resource.cpp |  40 +++++++++
 15 files changed, 320 insertions(+), 15 deletions(-)
 create mode 100644 include/libpmr/allocator.h
 create mode 100644 include/libpmr/def.h
 create mode 100644 include/libpmr/memory_resource.h
 create mode 100644 src/libpmr/CMakeLists.txt
 create mode 100644 src/libpmr/memory_resource.cpp
 create mode 100644 test/pmr/test_pmr_allocator.cpp
 create mode 100644 test/pmr/test_pmr_memory_resource.cpp

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index d0fb83da..8d46d743 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -1,7 +1,7 @@
 /**
  * @file libconcur/concurrent.h
  * @author mutouyun (orz@orzz.org)
- * @brief Define different policies for concurrent queue
+ * @brief Define different policies for concurrent queue.
  * @date 2022-11-07
  */
 #pragma once
diff --git a/include/libconcur/def.h b/include/libconcur/def.h
index 4faf35e1..83dd1bce 100644
--- a/include/libconcur/def.h
+++ b/include/libconcur/def.h
@@ -1,7 +1,7 @@
 /**
  * @file libconcur/def.h
  * @author mutouyun (orz@orzz.org)
- * @brief Define the trivial configuration information for concurrency
+ * @brief Define the trivial configuration information for concurrency.
  * @date 2022-11-07
  */
 #pragma once
diff --git a/include/libimp/byte.h b/include/libimp/byte.h
index 89faeaa7..dbf1f7c7 100644
--- a/include/libimp/byte.h
+++ b/include/libimp/byte.h
@@ -1,7 +1,7 @@
 /**
  * @file libimp/byte.h
  * @author mutouyun (orz@orzz.org)
- * @brief Define the byte type
+ * @brief Define the byte type.
  * @date 2022-11-12
  */
 #pragma once
diff --git a/include/libimp/def.h b/include/libimp/def.h
index f95b82d0..43480509 100644
--- a/include/libimp/def.h
+++ b/include/libimp/def.h
@@ -1,7 +1,7 @@
 /**
  * @file libimp/def.h
  * @author mutouyun (orz@orzz.org)
- * @brief Define the trivial configuration information
+ * @brief Define the trivial configuration information.
  * @date 2022-04-23
  */
 #pragma once
@@ -15,6 +15,6 @@
 
 LIBIMP_NAMESPACE_BEG_
 
-// constants
+/// @brief Constants.
 
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
index c445ed75..2e82655f 100644
--- a/include/libimp/detect_plat.h
+++ b/include/libimp/detect_plat.h
@@ -1,12 +1,12 @@
 /**
  * @file libimp/detect_plat.h
  * @author mutouyun (orz@orzz.org)
- * @brief Define platform detection related interfaces
+ * @brief Define platform detection related interfaces.
  * @date 2022-02-27
  */
 #pragma once
 
-// OS
+/// @brief OS check.
 
 #if defined(WINCE) || defined(_WIN32_WCE)
 # define LIBIMP_OS_WINCE
@@ -35,7 +35,7 @@
 # define LIBIMP_OS_WIN
 #endif
 
-// Compiler
+/// @brief Compiler check.
 
 #if defined(_MSC_VER)
 # define LIBIMP_CC_MSVC      _MSC_VER
@@ -48,8 +48,8 @@
 # error "This compiler is unsupported."
 #endif
 
-// Instruction set
-// @see https://sourceforge.net/p/predef/wiki/Architectures/
+/// @brief Instruction set.
+/// @see https://sourceforge.net/p/predef/wiki/Architectures/
 
 #if defined(_M_X64) || defined(_M_AMD64) || \
     defined(__x86_64__) || defined(__x86_64) || \
@@ -74,7 +74,7 @@
 # define LIBIMP_INSTR_ARM
 #endif
 
-// Byte order
+/// @brief Byte order.
 
 #if defined(__BYTE_ORDER__)
 # define LIBIMP_ENDIAN_BIG   (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
@@ -84,7 +84,7 @@
 # define LIBIMP_ENDIAN_LIT   (1)
 #endif
 
-// C++ version
+/// @brief C++ version.
 
 #if (__cplusplus >= 202002L) && !defined(LIBIMP_CPP_20)
 # define LIBIMP_CPP_20
@@ -102,7 +102,7 @@
 # error "This C++ version is unsupported."
 #endif
 
-// C++ attributes
+/// @brief C++ attributes.
 
 #if defined(__has_cpp_attribute)
 # if __has_cpp_attribute(fallthrough)
@@ -117,6 +117,9 @@
 # if __has_cpp_attribute(unlikely)
 #   define LIBIMP_UNLIKELY(...) (__VA_ARGS__) [[unlikely]]
 # endif
+# if __has_cpp_attribute(nodiscard)
+#   define LIBIMP_NODISCARD [[nodiscard]]
+# endif
 #endif
 
 #if !defined(LIBIMP_FALLTHROUGH)
@@ -160,3 +163,28 @@
 #if !defined(LIBIMP_UNLIKELY)
 # define LIBIMP_UNLIKELY(...) (__VA_ARGS__)
 #endif
+
+#if !defined(LIBIMP_NODISCARD)
+/// @see https://stackoverflow.com/questions/4226308/msvc-equivalent-of-attribute-warn-unused-result
+# if defined(LIBIMP_CC_GNUC) && (LIBIMP_CC_GNUC >= 4)
+#   define LIBIMP_NODISCARD __attribute__((warn_unused_result))
+# elif defined(LIBIMP_CC_MSVC) && (LIBIMP_CC_MSVC >= 1700)
+#   define LIBIMP_NODISCARD _Check_return_
+# else
+#   define LIBIMP_NODISCARD
+# endif
+#endif
+
+/// @see https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_exceptions.html
+///      https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros
+///      https://stackoverflow.com/questions/6487013/programmatically-determine-whether-exceptions-are-enabled
+#if defined(__cpp_exceptions) && __cpp_exceptions || \
+    defined(__EXCEPTIONS) || defined(_CPPUNWIND)
+# define LIBIMP_TRY         try
+# define LIBIMP_CATCH(...)  catch(__VA_ARGS__)
+# define LIBIMP_THROW(...)  throw __VA_ARGS__
+#else
+# define LIBIMP_TRY        if (true)
+# define LIBIMP_CATCH(...) else if (false)
+# define LIBIMP_THROW(...)
+#endif
\ No newline at end of file
diff --git a/include/libipc/def.h b/include/libipc/def.h
index f02ee8dc..0ad70853 100755
--- a/include/libipc/def.h
+++ b/include/libipc/def.h
@@ -1,7 +1,7 @@
 /**
  * @file libipc/def.h
  * @author mutouyun (orz@orzz.org)
- * @brief Define the trivial configuration information
+ * @brief Define the trivial configuration information.
  * @date 2022-02-27
  */
 #pragma once
diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
new file mode 100644
index 00000000..f323090a
--- /dev/null
+++ b/include/libpmr/allocator.h
@@ -0,0 +1,28 @@
+/**
+ * @file libpmr/allocator.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief A generic polymorphic memory allocator.
+ * @date 2022-11-13
+ */
+#pragma once
+
+#include "libpmr/def.h"
+#include "libpmr/memory_resource.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/**
+ * @brief An allocator which exhibits different allocation behavior 
+ * depending upon the memory resource from which it is constructed.
+ * 
+ * @remarks Unlike std::pmr::polymorphic_allocator, it does not 
+ * rely on a specific inheritance relationship and only restricts 
+ * the interface behavior of the incoming memory resource object to 
+ * conform to std::pmr::memory_resource.
+ * 
+ * @see https://en.cppreference.com/w/cpp/memory/memory_resource
+ *      https://en.cppreference.com/w/cpp/memory/polymorphic_allocator
+ */
+
+
+LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/def.h b/include/libpmr/def.h
new file mode 100644
index 00000000..adb9544b
--- /dev/null
+++ b/include/libpmr/def.h
@@ -0,0 +1,17 @@
+/**
+ * @file libpmr/def.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define the trivial configuration information for memory resources.
+ * @date 2022-11-13
+ */
+#pragma once
+
+#define LIBPMR_               pmr
+#define LIBPMR_NAMESPACE_BEG_ namespace LIBPMR_ {
+#define LIBPMR_NAMESPACE_END_ }
+
+LIBPMR_NAMESPACE_BEG_
+
+/// @brief Constants.
+
+LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/memory_resource.h b/include/libpmr/memory_resource.h
new file mode 100644
index 00000000..328a6400
--- /dev/null
+++ b/include/libpmr/memory_resource.h
@@ -0,0 +1,34 @@
+/**
+ * @file libpmr/memory_resource.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Implement memory allocation strategies that can be used by pmr::allocator.
+ * @date 2022-11-13
+ */
+#pragma once
+
+#include <cstddef>  // std::size_t
+
+#include "libimp/export.h"
+#include "libpmr/def.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/**
+ * @brief A memory resource that uses the 
+ * global operator new and operator delete to allocate memory.
+ * 
+ * @see https://en.cppreference.com/w/cpp/memory/new_delete_resource
+ */
+class LIBIMP_EXPORT new_delete_resource {
+public:
+  /// @brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
+  /// @remark Returns nullptr if storage of the requested size and alignment cannot be obtained.
+  /// @see https://en.cppreference.com/w/cpp/memory/memory_resource/do_allocate
+  void *do_allocate(std::size_t bytes, std::size_t alignment) noexcept;
+
+  /// @brief Deallocates the storage pointed to by p.
+  /// @see https://en.cppreference.com/w/cpp/memory/memory_resource/deallocate
+  void do_deallocate(void* p, std::size_t bytes, std::size_t alignment) noexcept;
+};
+
+LIBPMR_NAMESPACE_END_
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 38f4cb30..f0c49828 100755
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,3 +1,4 @@
 
 add_subdirectory(libimp)
+add_subdirectory(libpmr)
 add_subdirectory(libipc)
diff --git a/src/libpmr/CMakeLists.txt b/src/libpmr/CMakeLists.txt
new file mode 100644
index 00000000..976508aa
--- /dev/null
+++ b/src/libpmr/CMakeLists.txt
@@ -0,0 +1,32 @@
+project(pmr)
+
+if(NOT MSVC)
+  add_compile_options(
+    -Wno-attributes)
+endif()
+
+aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libpmr SRC_FILES)
+
+file(GLOB HEAD_FILES
+  ${LIBIPC_PROJECT_DIR}/include/libpmr/*.h)
+
+add_library(${PROJECT_NAME} STATIC ${SRC_FILES} ${HEAD_FILES})
+
+# set output directory
+set_target_properties(${PROJECT_NAME}
+	PROPERTIES
+	ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+	LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+	RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
+
+target_include_directories(${PROJECT_NAME}
+  PUBLIC  ${LIBIPC_PROJECT_DIR}/include
+  PRIVATE ${LIBIPC_PROJECT_DIR}/src)
+
+target_link_libraries(${PROJECT_NAME} PUBLIC imp)
+
+install(
+  TARGETS ${PROJECT_NAME}
+  RUNTIME DESTINATION bin
+  LIBRARY DESTINATION lib
+  ARCHIVE DESTINATION lib)
diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
new file mode 100644
index 00000000..b16038d2
--- /dev/null
+++ b/src/libpmr/memory_resource.cpp
@@ -0,0 +1,117 @@
+
+#include <cstdlib>    // std::aligned_alloc
+#include <cstddef>    // std::max_align_t
+#include <exception>
+
+#include "libimp/detect_plat.h"
+#include "libimp/system.h"
+#include "libimp/log.h"
+
+#include "libpmr/memory_resource.h"
+
+LIBPMR_NAMESPACE_BEG_
+namespace {
+
+/**
+ * @brief Check that bytes is not 0 and that the alignment is a power of two.
+ */
+bool verify_args(::LIBIMP_::log::gripper &log, std::size_t bytes, std::size_t alignment) noexcept {
+  if (bytes == 0) {
+    return false;
+  }
+  if ((alignment == 0) || (alignment & (alignment - 1)) != 0) {
+    log.error("invalid bytes = {}, alignment = {}", bytes, alignment);
+    return false;
+  }
+  return true;
+}
+
+} // namespace
+
+/**
+ * @brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
+ * @remark Alignment shall be a power of two.
+ * 
+ * @see https://en.cppreference.com/w/cpp/memory/memory_resource/do_allocate
+ *      https://www.cppstories.com/2019/08/newnew-align/
+ * 
+ * @return void * - nullptr if storage of the requested size and alignment cannot be obtained.
+ */
+void *new_delete_resource::do_allocate(std::size_t bytes, std::size_t alignment) noexcept {
+  LIBIMP_LOG_();
+  if (!verify_args(log, bytes, alignment)) {
+    return nullptr;
+  }
+  if (alignment <= alignof(std::max_align_t)) {
+    /// @see https://en.cppreference.com/w/cpp/memory/c/malloc
+    return std::malloc(bytes);
+  }
+#if defined(LIBIMP_CPP_17)
+  LIBIMP_TRY {
+    /// @see https://en.cppreference.com/w/cpp/memory/c/aligned_alloc
+    return std::aligned_alloc(alignment, bytes);
+  } LIBIMP_CATCH(std::exception const &e) {
+    log.error("std::aligned_alloc(alignment = {}, bytes = {}) fails. error = {}", 
+               alignment, bytes, e.what());
+    return nullptr;
+  } LIBIMP_CATCH(...) {
+    log.error("std::aligned_alloc(alignment = {}, bytes = {}) fails. error = unknown exception", 
+               alignment, bytes);
+    return nullptr;
+  }
+#elif defined(LIBIMP_OS_WIN)
+  /// @see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/aligned-malloc
+  return ::_aligned_malloc(bytes, alignment);
+#else // try posix
+  /// @see https://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_memalign.html
+  void *p = nullptr;
+  int ret = ::posix_memalign(&p, alignment, bytes);
+  if (ret != 0) {
+    log.error("posix_memalign(alignment = {}, bytes = {}) fails. error = {}", 
+               alignment, bytes, sys::error(ret));
+    return nullptr;
+  }
+  return p;
+#endif
+}
+
+/**
+ * @brief Deallocates the storage pointed to by p.
+ * @remark The storage it points to must not yet have been deallocated, otherwise the behavior is undefined.
+ * 
+ * @see https://en.cppreference.com/w/cpp/memory/memory_resource/do_deallocate
+ * 
+ * @param p must have been returned by a prior call to new_delete_resource::do_allocate(bytes, alignment).
+ */
+void new_delete_resource::do_deallocate(void* p, std::size_t bytes, std::size_t alignment) noexcept {
+  LIBIMP_LOG_();
+  if (p == nullptr) {
+    return;
+  }
+  if (!verify_args(log, bytes, alignment)) {
+    return;
+  }
+  if (alignment <= alignof(std::max_align_t)) {
+    /// @see https://en.cppreference.com/w/cpp/memory/c/free
+    std::free(p);
+    return;
+  }
+#if defined(LIBIMP_CPP_17)
+  LIBIMP_TRY {
+    std::free(p);
+  } LIBIMP_CATCH(std::exception const &e) {
+    log.error("std::free(p = {}) fails, alignment = {}, bytes = {}. error = {}", 
+               p, alignment, bytes, e.what());
+  } LIBIMP_CATCH(...) {
+    log.error("std::free(p = {}) fails, alignment = {}, bytes = {}. error = unknown exception", 
+               p, alignment, bytes);
+  }
+#elif defined(LIBIMP_OS_WIN)
+  /// @see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/aligned-free
+  ::_aligned_free(p);
+#else // try posix
+  ::free(p);
+#endif
+}
+
+LIBPMR_NAMESPACE_END_
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 3bc49f02..76cfa6ac 100755
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -15,6 +15,7 @@ include_directories(
 
 file(GLOB SRC_FILES
   ${LIBIPC_PROJECT_DIR}/test/imp/*.cpp
+  ${LIBIPC_PROJECT_DIR}/test/pmr/*.cpp
   ${LIBIPC_PROJECT_DIR}/test/*.cpp)
 
 file(GLOB HEAD_FILES
@@ -23,5 +24,5 @@ file(GLOB HEAD_FILES
 add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
 
 link_directories(${LIBIPC_PROJECT_DIR}/3rdparty/gperftools)
-target_link_libraries(${PROJECT_NAME} gtest_main imp ipc)
+target_link_libraries(${PROJECT_NAME} gtest_main imp pmr ipc)
 #target_link_libraries(${PROJECT_NAME} tcmalloc_minimal)
diff --git a/test/pmr/test_pmr_allocator.cpp b/test/pmr/test_pmr_allocator.cpp
new file mode 100644
index 00000000..2282cc8e
--- /dev/null
+++ b/test/pmr/test_pmr_allocator.cpp
@@ -0,0 +1,7 @@
+
+#include "gtest/gtest.h"
+
+#include "libpmr/allocator.h"
+
+TEST(allocator, construct) {
+}
\ No newline at end of file
diff --git a/test/pmr/test_pmr_memory_resource.cpp b/test/pmr/test_pmr_memory_resource.cpp
new file mode 100644
index 00000000..92a6a21e
--- /dev/null
+++ b/test/pmr/test_pmr_memory_resource.cpp
@@ -0,0 +1,40 @@
+
+#include <utility>
+
+#include "gtest/gtest.h"
+
+#include "libpmr/memory_resource.h"
+
+namespace {
+
+template <typename T>
+void *test_mr(T &&mr, std::size_t bytes, std::size_t alignment) {
+  auto p = std::forward<T>(mr).do_allocate(bytes, alignment);
+  if (alignment == 0) {
+    EXPECT_EQ(p, nullptr);
+  } else if (p != nullptr) {
+    EXPECT_EQ((std::size_t)p % alignment, 0);
+  }
+  std::forward<T>(mr).do_deallocate(p, bytes, alignment);
+  return p;
+}
+
+} // namespace
+
+TEST(memory_resource, new_delete_resource) {
+  pmr::new_delete_resource m_res;
+
+  EXPECT_EQ(test_mr(m_res, 0, 0), nullptr);
+  EXPECT_EQ(test_mr(m_res, 0, 1), nullptr);
+  EXPECT_EQ(test_mr(m_res, 0, 2), nullptr);
+  EXPECT_EQ(test_mr(m_res, 0, 3), nullptr);
+  EXPECT_EQ(test_mr(m_res, 0, 8), nullptr);
+  EXPECT_EQ(test_mr(m_res, 0, 64), nullptr);
+
+  EXPECT_EQ(test_mr(m_res, 1, 0), nullptr);
+  EXPECT_NE(test_mr(m_res, 1, 1), nullptr);
+  EXPECT_NE(test_mr(m_res, 1, 2), nullptr);
+  EXPECT_EQ(test_mr(m_res, 1, 3), nullptr);
+  EXPECT_NE(test_mr(m_res, 1, 8), nullptr);
+  EXPECT_NE(test_mr(m_res, 1, 64), nullptr);
+}
\ No newline at end of file

From ba66b5957511d019730a7537f08d85a9d0900fa9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9C=A8=E5=A4=B4=E4=BA=91?= <orz@orzz.org>
Date: Sun, 13 Nov 2022 11:02:09 +0000
Subject: [PATCH 091/272] upd: [test] SUCCEED

---
 test/imp/test_imp_detect_plat.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test/imp/test_imp_detect_plat.cpp b/test/imp/test_imp_detect_plat.cpp
index 4ec8400a..0870cc45 100644
--- a/test/imp/test_imp_detect_plat.cpp
+++ b/test/imp/test_imp_detect_plat.cpp
@@ -24,6 +24,7 @@ TEST(detect_plat, os) {
 #else
   ASSERT_TRUE(false);
 #endif
+  SUCCEED();
 }
 
 TEST(detect_plat, cc) {
@@ -34,6 +35,7 @@ TEST(detect_plat, cc) {
 #else
   ASSERT_TRUE(false);
 #endif
+  SUCCEED();
 }
 
 TEST(detect_plat, cpp) {
@@ -46,6 +48,7 @@ TEST(detect_plat, cpp) {
 #else
   ASSERT_TRUE(false);
 #endif
+  SUCCEED();
 }
 
 TEST(detect_plat, byte_order) {
@@ -73,10 +76,12 @@ TEST(detect_plat, fallthrough) {
     std::cout << "fallthrough default\n";
     break;
   }
+  SUCCEED();
 }
 
 TEST(detect_plat, unused) {
   LIBIMP_UNUSED int abc;
+  SUCCEED();
 }
 
 TEST(detect_plat, likely_unlikely) {
@@ -88,4 +93,5 @@ TEST(detect_plat, likely_unlikely) {
   } else {
     std::cout << "sizeof(int) < whatever\n";
   }
+  SUCCEED();
 }
\ No newline at end of file

From efe1fe61ddbe64e7e84e2b9c44653d428e06e016 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 13 Nov 2022 19:13:31 +0800
Subject: [PATCH 092/272] fix: [pmr] missed exception handling

---
 src/libpmr/memory_resource.cpp | 33 +++++++++++++++++++--------------
 1 file changed, 19 insertions(+), 14 deletions(-)

diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
index b16038d2..ddc7c70b 100644
--- a/src/libpmr/memory_resource.cpp
+++ b/src/libpmr/memory_resource.cpp
@@ -47,8 +47,8 @@ void *new_delete_resource::do_allocate(std::size_t bytes, std::size_t alignment)
     return std::malloc(bytes);
   }
 #if defined(LIBIMP_CPP_17)
+  /// @see https://en.cppreference.com/w/cpp/memory/c/aligned_alloc
   LIBIMP_TRY {
-    /// @see https://en.cppreference.com/w/cpp/memory/c/aligned_alloc
     return std::aligned_alloc(alignment, bytes);
   } LIBIMP_CATCH(std::exception const &e) {
     log.error("std::aligned_alloc(alignment = {}, bytes = {}) fails. error = {}", 
@@ -91,27 +91,32 @@ void new_delete_resource::do_deallocate(void* p, std::size_t bytes, std::size_t
   if (!verify_args(log, bytes, alignment)) {
     return;
   }
-  if (alignment <= alignof(std::max_align_t)) {
+  auto std_free = [&log, bytes, alignment](void* p) noexcept {
     /// @see https://en.cppreference.com/w/cpp/memory/c/free
-    std::free(p);
-    return;
-  }
+    LIBIMP_TRY {
+      std::free(p);
+    } LIBIMP_CATCH(std::exception const &e) {
+      log.error("std::free(p = {}) fails, alignment = {}, bytes = {}. error = {}", 
+                p, alignment, bytes, e.what());
+    } LIBIMP_CATCH(...) {
+      log.error("std::free(p = {}) fails, alignment = {}, bytes = {}. error = unknown exception", 
+                p, alignment, bytes);
+    }
+  };
 #if defined(LIBIMP_CPP_17)
-  LIBIMP_TRY {
-    std::free(p);
-  } LIBIMP_CATCH(std::exception const &e) {
-    log.error("std::free(p = {}) fails, alignment = {}, bytes = {}. error = {}", 
-               p, alignment, bytes, e.what());
-  } LIBIMP_CATCH(...) {
-    log.error("std::free(p = {}) fails, alignment = {}, bytes = {}. error = unknown exception", 
-               p, alignment, bytes);
+  std_free(p);
+#else
+  if (alignment <= alignof(std::max_align_t)) {
+    std_free(p);
+    return;
   }
-#elif defined(LIBIMP_OS_WIN)
+#if defined(LIBIMP_OS_WIN)
   /// @see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/aligned-free
   ::_aligned_free(p);
 #else // try posix
   ::free(p);
 #endif
+#endif // defined(LIBIMP_CPP_17)
 }
 
 LIBPMR_NAMESPACE_END_

From a392b88787e7da073c0a8c00bd22520e00e67b85 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 14 Nov 2022 21:32:00 +0800
Subject: [PATCH 093/272] upd: [pmr] helper trait for allocator

---
 include/libimp/span.h                 |  2 +-
 include/libpmr/allocator.h            | 29 +++++++++++++++++++++++++++
 include/libpmr/memory_resource.h      |  6 +++---
 src/libpmr/memory_resource.cpp        |  5 ++---
 test/pmr/test_pmr_allocator.cpp       | 12 +++++++++++
 test/pmr/test_pmr_memory_resource.cpp |  4 ++--
 6 files changed, 49 insertions(+), 9 deletions(-)

diff --git a/include/libimp/span.h b/include/libimp/span.h
index 814c06e7..2511d290 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -31,7 +31,7 @@
 LIBIMP_NAMESPACE_BEG_
 namespace detail {
 
-/// @brief helper trait for span
+/// @brief Helper trait for span.
 
 template <typename From, typename To>
 using array_convertible = std::is_convertible<From(*)[], To(*)[]>;
diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index f323090a..f28fc45a 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -6,10 +6,37 @@
  */
 #pragma once
 
+#include <type_traits>
+
+#include "libimp/export.h"
+
 #include "libpmr/def.h"
 #include "libpmr/memory_resource.h"
 
 LIBPMR_NAMESPACE_BEG_
+namespace detail {
+
+/// @brief Helper trait for allocator.
+
+template <typename T, typename = void>
+struct has_allocate : std::false_type {};
+
+template <typename T>
+struct has_allocate<T, 
+  typename std::enable_if<std::is_convertible<
+  decltype(std::declval<T &>().allocate(std::declval<std::size_t>())), void *
+  >::value>::type> : std::true_type {};
+
+template <typename T, typename = void>
+struct has_deallocate : std::false_type {};
+
+template <typename T>
+struct has_deallocate<T, 
+  decltype(std::declval<T &>().deallocate(std::declval<void *>(), 
+                                          std::declval<std::size_t>()))
+  > : std::true_type {};
+
+} // namespace detail
 
 /**
  * @brief An allocator which exhibits different allocation behavior 
@@ -23,6 +50,8 @@ LIBPMR_NAMESPACE_BEG_
  * @see https://en.cppreference.com/w/cpp/memory/memory_resource
  *      https://en.cppreference.com/w/cpp/memory/polymorphic_allocator
  */
+class LIBIMP_EXPORT allocator {
 
+};
 
 LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/memory_resource.h b/include/libpmr/memory_resource.h
index 328a6400..fb05132c 100644
--- a/include/libpmr/memory_resource.h
+++ b/include/libpmr/memory_resource.h
@@ -6,7 +6,7 @@
  */
 #pragma once
 
-#include <cstddef>  // std::size_t
+#include <cstddef>  // std::size_t, std::max_align_t
 
 #include "libimp/export.h"
 #include "libpmr/def.h"
@@ -24,11 +24,11 @@ class LIBIMP_EXPORT new_delete_resource {
   /// @brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
   /// @remark Returns nullptr if storage of the requested size and alignment cannot be obtained.
   /// @see https://en.cppreference.com/w/cpp/memory/memory_resource/do_allocate
-  void *do_allocate(std::size_t bytes, std::size_t alignment) noexcept;
+  void *allocate(std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
 
   /// @brief Deallocates the storage pointed to by p.
   /// @see https://en.cppreference.com/w/cpp/memory/memory_resource/deallocate
-  void do_deallocate(void* p, std::size_t bytes, std::size_t alignment) noexcept;
+  void deallocate(void *p, std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
 };
 
 LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
index ddc7c70b..ef9fe956 100644
--- a/src/libpmr/memory_resource.cpp
+++ b/src/libpmr/memory_resource.cpp
@@ -1,6 +1,5 @@
 
 #include <cstdlib>    // std::aligned_alloc
-#include <cstddef>    // std::max_align_t
 #include <exception>
 
 #include "libimp/detect_plat.h"
@@ -37,7 +36,7 @@ bool verify_args(::LIBIMP_::log::gripper &log, std::size_t bytes, std::size_t al
  * 
  * @return void * - nullptr if storage of the requested size and alignment cannot be obtained.
  */
-void *new_delete_resource::do_allocate(std::size_t bytes, std::size_t alignment) noexcept {
+void *new_delete_resource::allocate(std::size_t bytes, std::size_t alignment) noexcept {
   LIBIMP_LOG_();
   if (!verify_args(log, bytes, alignment)) {
     return nullptr;
@@ -83,7 +82,7 @@ void *new_delete_resource::do_allocate(std::size_t bytes, std::size_t alignment)
  * 
  * @param p must have been returned by a prior call to new_delete_resource::do_allocate(bytes, alignment).
  */
-void new_delete_resource::do_deallocate(void* p, std::size_t bytes, std::size_t alignment) noexcept {
+void new_delete_resource::deallocate(void *p, std::size_t bytes, std::size_t alignment) noexcept {
   LIBIMP_LOG_();
   if (p == nullptr) {
     return;
diff --git a/test/pmr/test_pmr_allocator.cpp b/test/pmr/test_pmr_allocator.cpp
index 2282cc8e..d90abf93 100644
--- a/test/pmr/test_pmr_allocator.cpp
+++ b/test/pmr/test_pmr_allocator.cpp
@@ -1,7 +1,19 @@
 
+#include <vector>
+#include <memory_resource>
+
 #include "gtest/gtest.h"
 
 #include "libpmr/allocator.h"
 
+TEST(allocator, detail) {
+  EXPECT_FALSE(pmr::detail::has_allocate<void>::value);
+  EXPECT_FALSE(pmr::detail::has_allocate<int>::value);
+  EXPECT_FALSE(pmr::detail::has_allocate<std::vector<int>>::value);
+  EXPECT_TRUE (pmr::detail::has_allocate<std::allocator<int>>::value);
+  EXPECT_TRUE (pmr::detail::has_allocate<std::pmr::memory_resource>::value);
+  EXPECT_TRUE (pmr::detail::has_allocate<std::pmr::polymorphic_allocator<int>>::value);
+}
+
 TEST(allocator, construct) {
 }
\ No newline at end of file
diff --git a/test/pmr/test_pmr_memory_resource.cpp b/test/pmr/test_pmr_memory_resource.cpp
index 92a6a21e..5c662aa3 100644
--- a/test/pmr/test_pmr_memory_resource.cpp
+++ b/test/pmr/test_pmr_memory_resource.cpp
@@ -9,13 +9,13 @@ namespace {
 
 template <typename T>
 void *test_mr(T &&mr, std::size_t bytes, std::size_t alignment) {
-  auto p = std::forward<T>(mr).do_allocate(bytes, alignment);
+  auto p = std::forward<T>(mr).allocate(bytes, alignment);
   if (alignment == 0) {
     EXPECT_EQ(p, nullptr);
   } else if (p != nullptr) {
     EXPECT_EQ((std::size_t)p % alignment, 0);
   }
-  std::forward<T>(mr).do_deallocate(p, bytes, alignment);
+  std::forward<T>(mr).deallocate(p, bytes, alignment);
   return p;
 }
 

From 4c9c8bb875ec695050341a51714603c1b0284ab0 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 14 Nov 2022 21:46:17 +0800
Subject: [PATCH 094/272] fix: [test] fatal error C1083 cannot open include
 file 'memory_resource'

---
 test/pmr/test_pmr_allocator.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/test/pmr/test_pmr_allocator.cpp b/test/pmr/test_pmr_allocator.cpp
index d90abf93..266e23ce 100644
--- a/test/pmr/test_pmr_allocator.cpp
+++ b/test/pmr/test_pmr_allocator.cpp
@@ -1,6 +1,8 @@
 
 #include <vector>
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_memory_resource)
 #include <memory_resource>
+#endif
 
 #include "gtest/gtest.h"
 
@@ -11,8 +13,10 @@ TEST(allocator, detail) {
   EXPECT_FALSE(pmr::detail::has_allocate<int>::value);
   EXPECT_FALSE(pmr::detail::has_allocate<std::vector<int>>::value);
   EXPECT_TRUE (pmr::detail::has_allocate<std::allocator<int>>::value);
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_memory_resource)
   EXPECT_TRUE (pmr::detail::has_allocate<std::pmr::memory_resource>::value);
   EXPECT_TRUE (pmr::detail::has_allocate<std::pmr::polymorphic_allocator<int>>::value);
+#endif
 }
 
 TEST(allocator, construct) {

From cc17980b973579178d718a96a5b3935e1381c8eb Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Tue, 15 Nov 2022 09:30:48 +0800
Subject: [PATCH 095/272] add: [pmr] is_memory_resource

---
 include/libpmr/allocator.h      | 5 +++++
 test/pmr/test_pmr_allocator.cpp | 9 +++++++++
 2 files changed, 14 insertions(+)

diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index f28fc45a..c9a279f5 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -36,6 +36,11 @@ struct has_deallocate<T,
                                           std::declval<std::size_t>()))
   > : std::true_type {};
 
+template <typename T>
+using is_memory_resource = 
+  typename std::enable_if<has_allocate  <T>::value && 
+                          has_deallocate<T>::value>::type;
+
 } // namespace detail
 
 /**
diff --git a/test/pmr/test_pmr_allocator.cpp b/test/pmr/test_pmr_allocator.cpp
index 266e23ce..1f3be4fe 100644
--- a/test/pmr/test_pmr_allocator.cpp
+++ b/test/pmr/test_pmr_allocator.cpp
@@ -17,6 +17,15 @@ TEST(allocator, detail) {
   EXPECT_TRUE (pmr::detail::has_allocate<std::pmr::memory_resource>::value);
   EXPECT_TRUE (pmr::detail::has_allocate<std::pmr::polymorphic_allocator<int>>::value);
 #endif
+
+  EXPECT_FALSE(pmr::detail::has_deallocate<void>::value);
+  EXPECT_FALSE(pmr::detail::has_deallocate<int>::value);
+  EXPECT_FALSE(pmr::detail::has_deallocate<std::vector<int>>::value);
+  EXPECT_FALSE(pmr::detail::has_deallocate<std::allocator<int>>::value);
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_memory_resource)
+  EXPECT_TRUE (pmr::detail::has_deallocate<std::pmr::memory_resource>::value);
+  EXPECT_FALSE(pmr::detail::has_deallocate<std::pmr::polymorphic_allocator<int>>::value);
+#endif
 }
 
 TEST(allocator, construct) {

From 1fd5b3825e24e4f8f2875ac29d119e08289aade6 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Fri, 18 Nov 2022 21:25:14 +0800
Subject: [PATCH 096/272] add: [pmr] allocator & ut

---
 include/libpmr/allocator.h            | 103 +++++++++++++++++++-------
 include/libpmr/memory_resource.h      |  31 +++++++-
 src/libpmr/allocator.cpp              |  58 +++++++++++++++
 src/libpmr/memory_resource.cpp        |  10 +++
 test/pmr/test_pmr_allocator.cpp       |  90 ++++++++++++++++------
 test/pmr/test_pmr_memory_resource.cpp |  53 +++++++++----
 6 files changed, 279 insertions(+), 66 deletions(-)
 create mode 100644 src/libpmr/allocator.cpp

diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index c9a279f5..c021d21a 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -7,41 +7,16 @@
 #pragma once
 
 #include <type_traits>
+#include <array>
 
 #include "libimp/export.h"
+#include "libimp/construct.h"
+#include "libimp/byte.h"
 
 #include "libpmr/def.h"
 #include "libpmr/memory_resource.h"
 
 LIBPMR_NAMESPACE_BEG_
-namespace detail {
-
-/// @brief Helper trait for allocator.
-
-template <typename T, typename = void>
-struct has_allocate : std::false_type {};
-
-template <typename T>
-struct has_allocate<T, 
-  typename std::enable_if<std::is_convertible<
-  decltype(std::declval<T &>().allocate(std::declval<std::size_t>())), void *
-  >::value>::type> : std::true_type {};
-
-template <typename T, typename = void>
-struct has_deallocate : std::false_type {};
-
-template <typename T>
-struct has_deallocate<T, 
-  decltype(std::declval<T &>().deallocate(std::declval<void *>(), 
-                                          std::declval<std::size_t>()))
-  > : std::true_type {};
-
-template <typename T>
-using is_memory_resource = 
-  typename std::enable_if<has_allocate  <T>::value && 
-                          has_deallocate<T>::value>::type;
-
-} // namespace detail
 
 /**
  * @brief An allocator which exhibits different allocation behavior 
@@ -57,6 +32,78 @@ using is_memory_resource =
  */
 class LIBIMP_EXPORT allocator {
 
+  class holder_base {
+  public:
+    virtual ~holder_base() noexcept = default;
+    virtual void *alloc(std::size_t) = 0;
+    virtual void  free (void *, std::size_t) = 0;
+    virtual bool  valid() const noexcept = 0;
+  };
+
+  class holder_null : public holder_base {
+  public:
+    void *alloc(std::size_t) override { return nullptr; }
+    void  free (void *, std::size_t) override {}
+    bool  valid() const noexcept override { return false; }
+  };
+
+  template <typename MemRes>
+  class holder_memory_resource : public holder_base {
+    MemRes *p_mem_res_;
+
+  public:
+    holder_memory_resource(MemRes *p_mr) noexcept
+      : p_mem_res_(p_mr) {}
+
+    void *alloc(std::size_t s) override {
+      return p_mem_res_->allocate(s);
+    }
+
+    void free(void *p, std::size_t s) override {
+      p_mem_res_->deallocate(p, s);
+    }
+  
+    bool valid() const noexcept override {
+      return p_mem_res_ != nullptr;
+    }
+  };
+
+  template <>
+  class holder_memory_resource<void> : public holder_null {
+    void *p_dummy_;
+  };
+
+  using void_holder_type = holder_memory_resource<void>;
+  alignas(void_holder_type) std::array<::LIBIMP_::byte, sizeof(void_holder_type)> holder_;
+
+  holder_base &      get_holder() noexcept;
+  holder_base const &get_holder() const noexcept;
+
+public:
+  allocator() noexcept;
+  ~allocator() noexcept;
+
+  allocator(allocator const &other) noexcept = default;
+  allocator &operator=(allocator const &other) & noexcept = default;
+
+  allocator(allocator &&other) noexcept;
+  allocator &operator=(allocator &&other) & noexcept;
+
+  /// @brief Constructs a allocator from a memory resource pointer
+  /// @remark The lifetime of the pointer must be longer than that of allocator.
+  template <typename T, typename = is_memory_resource<T>>
+  allocator(T *p_mr) : allocator() {
+    if (p_mr == nullptr) return;
+    ::LIBIMP_::construct<holder_memory_resource<T>>(holder_.data(), p_mr);
+  }
+
+  void swap(allocator &other) noexcept;
+  bool valid() const noexcept;
+  explicit operator bool() const noexcept;
+
+  /// @brief Allocate/deallocate memory.
+  void *alloc(std::size_t s);
+  void  free (void *p, std::size_t s);
 };
 
 LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/memory_resource.h b/include/libpmr/memory_resource.h
index fb05132c..7baf5fe2 100644
--- a/include/libpmr/memory_resource.h
+++ b/include/libpmr/memory_resource.h
@@ -6,6 +6,7 @@
  */
 #pragma once
 
+#include <type_traits>
 #include <cstddef>  // std::size_t, std::max_align_t
 
 #include "libimp/export.h"
@@ -13,14 +14,42 @@
 
 LIBPMR_NAMESPACE_BEG_
 
+/// @brief Helper trait for memory resource.
+
+template <typename T, typename = void>
+struct has_allocate : std::false_type {};
+
+template <typename T>
+struct has_allocate<T, 
+  typename std::enable_if<std::is_convertible<
+  decltype(std::declval<T &>().allocate(std::declval<std::size_t>())), void *
+  >::value>::type> : std::true_type {};
+
+template <typename T, typename = void>
+struct has_deallocate : std::false_type {};
+
+template <typename T>
+struct has_deallocate<T, 
+  decltype(std::declval<T &>().deallocate(std::declval<void *>(), 
+                                          std::declval<std::size_t>()))
+  > : std::true_type {};
+
+template <typename T>
+using is_memory_resource = 
+  typename std::enable_if<has_allocate  <T>::value && 
+                          has_deallocate<T>::value>::type;
+
 /**
  * @brief A memory resource that uses the 
- * global operator new and operator delete to allocate memory.
+ * standard memory allocation and deallocation interface to allocate memory.
  * 
  * @see https://en.cppreference.com/w/cpp/memory/new_delete_resource
  */
 class LIBIMP_EXPORT new_delete_resource {
 public:
+  /// @brief Returns a pointer to a new_delete_resource.
+  static new_delete_resource *get() noexcept;
+
   /// @brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
   /// @remark Returns nullptr if storage of the requested size and alignment cannot be obtained.
   /// @see https://en.cppreference.com/w/cpp/memory/memory_resource/do_allocate
diff --git a/src/libpmr/allocator.cpp b/src/libpmr/allocator.cpp
new file mode 100644
index 00000000..e9c15db8
--- /dev/null
+++ b/src/libpmr/allocator.cpp
@@ -0,0 +1,58 @@
+
+#include <algorithm>  // std::swap
+
+#include "libpmr/allocator.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+allocator::holder_base &allocator::get_holder() noexcept {
+  return *::LIBIMP_::byte_cast<holder_base>(holder_.data());
+}
+
+allocator::holder_base const &allocator::get_holder() const noexcept {
+  return *::LIBIMP_::byte_cast<holder_base const>(holder_.data());
+}
+
+allocator::allocator() noexcept {
+  ::LIBIMP_::construct<holder_null>(holder_.data());
+}
+
+allocator::~allocator() noexcept {
+  ::LIBIMP_::destroy(&get_holder());
+}
+
+allocator::allocator(allocator &&other) noexcept
+  : allocator(other) /*copy*/ {
+  ::LIBIMP_::construct<holder_null>(other.holder_.data());
+}
+
+allocator &allocator::operator=(allocator &&other) & noexcept {
+  if (this == &other) return *this;
+  this->holder_ = other.holder_;
+  ::LIBIMP_::construct<holder_null>(other.holder_.data());
+  return *this;
+}
+
+void allocator::swap(allocator &other) noexcept {
+  std::swap(this->holder_, other.holder_);
+}
+
+bool allocator::valid() const noexcept {
+  return get_holder().valid();
+}
+
+allocator::operator bool() const noexcept {
+  return valid();
+}
+
+void *allocator::alloc(std::size_t s) {
+  if (!valid()) return nullptr;
+  return get_holder().alloc(s);
+}
+
+void allocator::free(void *p, std::size_t s) {
+  if (!valid()) return;
+  get_holder().free(p, s);
+}
+
+LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
index ef9fe956..e7d86a5a 100644
--- a/src/libpmr/memory_resource.cpp
+++ b/src/libpmr/memory_resource.cpp
@@ -27,6 +27,16 @@ bool verify_args(::LIBIMP_::log::gripper &log, std::size_t bytes, std::size_t al
 
 } // namespace
 
+/**
+ * @brief Returns a pointer to a new_delete_resource.
+ * 
+ * @return new_delete_resource* 
+ */
+new_delete_resource *new_delete_resource::get() noexcept {
+  static new_delete_resource mem_res;
+  return &mem_res;
+}
+
 /**
  * @brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
  * @remark Alignment shall be a power of two.
diff --git a/test/pmr/test_pmr_allocator.cpp b/test/pmr/test_pmr_allocator.cpp
index 1f3be4fe..28609793 100644
--- a/test/pmr/test_pmr_allocator.cpp
+++ b/test/pmr/test_pmr_allocator.cpp
@@ -1,32 +1,78 @@
 
 #include <vector>
-#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_memory_resource)
-#include <memory_resource>
-#endif
+#include <utility>
 
 #include "gtest/gtest.h"
 
 #include "libpmr/allocator.h"
 
-TEST(allocator, detail) {
-  EXPECT_FALSE(pmr::detail::has_allocate<void>::value);
-  EXPECT_FALSE(pmr::detail::has_allocate<int>::value);
-  EXPECT_FALSE(pmr::detail::has_allocate<std::vector<int>>::value);
-  EXPECT_TRUE (pmr::detail::has_allocate<std::allocator<int>>::value);
-#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_memory_resource)
-  EXPECT_TRUE (pmr::detail::has_allocate<std::pmr::memory_resource>::value);
-  EXPECT_TRUE (pmr::detail::has_allocate<std::pmr::polymorphic_allocator<int>>::value);
-#endif
-
-  EXPECT_FALSE(pmr::detail::has_deallocate<void>::value);
-  EXPECT_FALSE(pmr::detail::has_deallocate<int>::value);
-  EXPECT_FALSE(pmr::detail::has_deallocate<std::vector<int>>::value);
-  EXPECT_FALSE(pmr::detail::has_deallocate<std::allocator<int>>::value);
-#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_memory_resource)
-  EXPECT_TRUE (pmr::detail::has_deallocate<std::pmr::memory_resource>::value);
-  EXPECT_FALSE(pmr::detail::has_deallocate<std::pmr::polymorphic_allocator<int>>::value);
-#endif
+TEST(allocator, construct) {
+  pmr::allocator alc;
+  EXPECT_FALSE(alc.valid());
+  EXPECT_FALSE(alc);
 }
 
-TEST(allocator, construct) {
+TEST(allocator, construct_with_memory_resource) {
+  pmr::new_delete_resource mem_res;
+  pmr::allocator alc {&mem_res};
+  EXPECT_TRUE(alc.valid());
+  EXPECT_TRUE(alc);
+
+  auto p = alc.alloc(128);
+  EXPECT_NE(p, nullptr);
+  EXPECT_NO_THROW(alc.free(p, 128));
+}
+
+TEST(allocator, construct_copy_move) {
+  pmr::new_delete_resource mem_res;
+
+  pmr::allocator alc1 {&mem_res}, alc2;
+  EXPECT_TRUE (alc1.valid());
+  EXPECT_TRUE (alc1);
+  EXPECT_FALSE(alc2.valid());
+  EXPECT_FALSE(alc2);
+
+  pmr::allocator alc3 {alc1}, alc4{alc2}, alc5 {std::move(alc1)};
+  EXPECT_TRUE (alc3.valid());
+  EXPECT_TRUE (alc3);
+  EXPECT_FALSE(alc4.valid());
+  EXPECT_FALSE(alc4);
+  EXPECT_TRUE (alc5.valid());
+  EXPECT_TRUE (alc5);
+  EXPECT_FALSE(alc1.valid());
+  EXPECT_FALSE(alc1);
+}
+
+TEST(allocator, swap) {
+  pmr::new_delete_resource mem_res;
+
+  pmr::allocator alc1 {&mem_res}, alc2;
+  EXPECT_TRUE (alc1.valid());
+  EXPECT_TRUE (alc1);
+  EXPECT_FALSE(alc2.valid());
+  EXPECT_FALSE(alc2);
+
+  alc1.swap(alc2);
+  EXPECT_FALSE(alc1.valid());
+  EXPECT_FALSE(alc1);
+  EXPECT_TRUE (alc2.valid());
+  EXPECT_TRUE (alc2);
+}
+
+TEST(allocator, invalid_alloc_free) {
+  pmr::new_delete_resource mem_res;
+
+  pmr::allocator alc1 {&mem_res}, alc2;
+  EXPECT_EQ(alc1.alloc(0), nullptr);
+  EXPECT_NO_THROW(alc1.free(nullptr, 128));
+  EXPECT_NO_THROW(alc1.free(nullptr, 0));
+  EXPECT_NO_THROW(alc1.free(&alc1, 0));
+
+  EXPECT_EQ(alc2.alloc(0), nullptr);
+  EXPECT_NO_THROW(alc2.free(nullptr, 128));
+  EXPECT_NO_THROW(alc2.free(nullptr, 0));
+  EXPECT_NO_THROW(alc2.free(&alc1, 0));
+
+  EXPECT_EQ(alc2.alloc(1024), nullptr);
+  EXPECT_NO_THROW(alc2.free(&alc1, sizeof(alc1)));
 }
\ No newline at end of file
diff --git a/test/pmr/test_pmr_memory_resource.cpp b/test/pmr/test_pmr_memory_resource.cpp
index 5c662aa3..f90e4d3b 100644
--- a/test/pmr/test_pmr_memory_resource.cpp
+++ b/test/pmr/test_pmr_memory_resource.cpp
@@ -1,5 +1,8 @@
 
 #include <utility>
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_memory_resource)
+#include <memory_resource>
+#endif
 
 #include "gtest/gtest.h"
 
@@ -21,20 +24,40 @@ void *test_mr(T &&mr, std::size_t bytes, std::size_t alignment) {
 
 } // namespace
 
+TEST(memory_resource, traits) {
+  EXPECT_FALSE(pmr::has_allocate<void>::value);
+  EXPECT_FALSE(pmr::has_allocate<int>::value);
+  EXPECT_FALSE(pmr::has_allocate<std::vector<int>>::value);
+  EXPECT_TRUE (pmr::has_allocate<std::allocator<int>>::value);
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_memory_resource)
+  EXPECT_TRUE (pmr::has_allocate<std::pmr::memory_resource>::value);
+  EXPECT_TRUE (pmr::has_allocate<std::pmr::polymorphic_allocator<int>>::value);
+#endif
+
+  EXPECT_FALSE(pmr::has_deallocate<void>::value);
+  EXPECT_FALSE(pmr::has_deallocate<int>::value);
+  EXPECT_FALSE(pmr::has_deallocate<std::vector<int>>::value);
+  EXPECT_FALSE(pmr::has_deallocate<std::allocator<int>>::value);
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_memory_resource)
+  EXPECT_TRUE (pmr::has_deallocate<std::pmr::memory_resource>::value);
+  EXPECT_FALSE(pmr::has_deallocate<std::pmr::polymorphic_allocator<int>>::value);
+#endif
+}
+
 TEST(memory_resource, new_delete_resource) {
-  pmr::new_delete_resource m_res;
-
-  EXPECT_EQ(test_mr(m_res, 0, 0), nullptr);
-  EXPECT_EQ(test_mr(m_res, 0, 1), nullptr);
-  EXPECT_EQ(test_mr(m_res, 0, 2), nullptr);
-  EXPECT_EQ(test_mr(m_res, 0, 3), nullptr);
-  EXPECT_EQ(test_mr(m_res, 0, 8), nullptr);
-  EXPECT_EQ(test_mr(m_res, 0, 64), nullptr);
-
-  EXPECT_EQ(test_mr(m_res, 1, 0), nullptr);
-  EXPECT_NE(test_mr(m_res, 1, 1), nullptr);
-  EXPECT_NE(test_mr(m_res, 1, 2), nullptr);
-  EXPECT_EQ(test_mr(m_res, 1, 3), nullptr);
-  EXPECT_NE(test_mr(m_res, 1, 8), nullptr);
-  EXPECT_NE(test_mr(m_res, 1, 64), nullptr);
+  pmr::new_delete_resource mem_res;
+
+  EXPECT_EQ(test_mr(mem_res, 0, 0), nullptr);
+  EXPECT_EQ(test_mr(mem_res, 0, 1), nullptr);
+  EXPECT_EQ(test_mr(mem_res, 0, 2), nullptr);
+  EXPECT_EQ(test_mr(mem_res, 0, 3), nullptr);
+  EXPECT_EQ(test_mr(mem_res, 0, 8), nullptr);
+  EXPECT_EQ(test_mr(mem_res, 0, 64), nullptr);
+
+  EXPECT_EQ(test_mr(mem_res, 1, 0), nullptr);
+  EXPECT_NE(test_mr(mem_res, 1, 1), nullptr);
+  EXPECT_NE(test_mr(mem_res, 1, 2), nullptr);
+  EXPECT_EQ(test_mr(mem_res, 1, 3), nullptr);
+  EXPECT_NE(test_mr(mem_res, 1, 8), nullptr);
+  EXPECT_NE(test_mr(mem_res, 1, 64), nullptr);
 }
\ No newline at end of file

From 890492a3b9655824a04bfbfa64b4f74aa0981d4e Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Fri, 18 Nov 2022 21:55:08 +0800
Subject: [PATCH 097/272] =?UTF-8?q?fix:=20[pmr]=20explicit=20specializatio?=
 =?UTF-8?q?n=20in=20non-namespace=20scope=20=E2=80=98class=20pmr::allocato?=
 =?UTF-8?q?r=E2=80=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 include/libpmr/allocator.h     | 25 +++++++++++++++------
 src/libpmr/allocator.cpp       |  4 ++--
 src/libpmr/memory_resource.cpp | 40 +++++++++-------------------------
 3 files changed, 30 insertions(+), 39 deletions(-)

diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index c021d21a..a7019e23 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -47,12 +47,19 @@ class LIBIMP_EXPORT allocator {
     bool  valid() const noexcept override { return false; }
   };
 
-  template <typename MemRes>
-  class holder_memory_resource : public holder_base {
-    MemRes *p_mem_res_;
+  template <typename MemRes, typename = void>
+  class holder_memory_resource;
+
+  /**
+   * @brief A memory resource pointer holder class for type erasure.
+   * @tparam MR memory resource type
+   */
+  template <typename MR>
+  class holder_memory_resource<MR, is_memory_resource<MR>> : public holder_base {
+    MR *p_mem_res_;
 
   public:
-    holder_memory_resource(MemRes *p_mr) noexcept
+    holder_memory_resource(MR *p_mr) noexcept
       : p_mem_res_(p_mr) {}
 
     void *alloc(std::size_t s) override {
@@ -68,9 +75,13 @@ class LIBIMP_EXPORT allocator {
     }
   };
 
-  template <>
-  class holder_memory_resource<void> : public holder_null {
-    void *p_dummy_;
+  /**
+   * @brief An empty holding class used to calculate a reasonable memory size for the holder.
+   * @tparam MR cannot be converted to the type of memory resource
+   */
+  template <typename MR, typename U>
+  class holder_memory_resource : public holder_null {
+    MR *p_dummy_;
   };
 
   using void_holder_type = holder_memory_resource<void>;
diff --git a/src/libpmr/allocator.cpp b/src/libpmr/allocator.cpp
index e9c15db8..5254b0be 100644
--- a/src/libpmr/allocator.cpp
+++ b/src/libpmr/allocator.cpp
@@ -6,11 +6,11 @@
 LIBPMR_NAMESPACE_BEG_
 
 allocator::holder_base &allocator::get_holder() noexcept {
-  return *::LIBIMP_::byte_cast<holder_base>(holder_.data());
+  return *reinterpret_cast<holder_base *>(holder_.data());
 }
 
 allocator::holder_base const &allocator::get_holder() const noexcept {
-  return *::LIBIMP_::byte_cast<holder_base const>(holder_.data());
+  return *reinterpret_cast<holder_base const *>(holder_.data());
 }
 
 allocator::allocator() noexcept {
diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
index e7d86a5a..6f7c52d2 100644
--- a/src/libpmr/memory_resource.cpp
+++ b/src/libpmr/memory_resource.cpp
@@ -1,6 +1,5 @@
 
-#include <cstdlib>    // std::aligned_alloc
-#include <exception>
+#include <cstdlib>  // std::aligned_alloc
 
 #include "libimp/detect_plat.h"
 #include "libimp/system.h"
@@ -51,24 +50,15 @@ void *new_delete_resource::allocate(std::size_t bytes, std::size_t alignment) no
   if (!verify_args(log, bytes, alignment)) {
     return nullptr;
   }
+#if defined(LIBIMP_CPP_17)
+  /// @see https://en.cppreference.com/w/cpp/memory/c/aligned_alloc
+  return std::aligned_alloc(alignment, bytes);
+#else
   if (alignment <= alignof(std::max_align_t)) {
     /// @see https://en.cppreference.com/w/cpp/memory/c/malloc
     return std::malloc(bytes);
   }
-#if defined(LIBIMP_CPP_17)
-  /// @see https://en.cppreference.com/w/cpp/memory/c/aligned_alloc
-  LIBIMP_TRY {
-    return std::aligned_alloc(alignment, bytes);
-  } LIBIMP_CATCH(std::exception const &e) {
-    log.error("std::aligned_alloc(alignment = {}, bytes = {}) fails. error = {}", 
-               alignment, bytes, e.what());
-    return nullptr;
-  } LIBIMP_CATCH(...) {
-    log.error("std::aligned_alloc(alignment = {}, bytes = {}) fails. error = unknown exception", 
-               alignment, bytes);
-    return nullptr;
-  }
-#elif defined(LIBIMP_OS_WIN)
+#if defined(LIBIMP_OS_WIN)
   /// @see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/aligned-malloc
   return ::_aligned_malloc(bytes, alignment);
 #else // try posix
@@ -82,6 +72,7 @@ void *new_delete_resource::allocate(std::size_t bytes, std::size_t alignment) no
   }
   return p;
 #endif
+#endif // defined(LIBIMP_CPP_17)
 }
 
 /**
@@ -100,23 +91,12 @@ void new_delete_resource::deallocate(void *p, std::size_t bytes, std::size_t ali
   if (!verify_args(log, bytes, alignment)) {
     return;
   }
-  auto std_free = [&log, bytes, alignment](void* p) noexcept {
-    /// @see https://en.cppreference.com/w/cpp/memory/c/free
-    LIBIMP_TRY {
-      std::free(p);
-    } LIBIMP_CATCH(std::exception const &e) {
-      log.error("std::free(p = {}) fails, alignment = {}, bytes = {}. error = {}", 
-                p, alignment, bytes, e.what());
-    } LIBIMP_CATCH(...) {
-      log.error("std::free(p = {}) fails, alignment = {}, bytes = {}. error = unknown exception", 
-                p, alignment, bytes);
-    }
-  };
 #if defined(LIBIMP_CPP_17)
-  std_free(p);
+  /// @see https://en.cppreference.com/w/cpp/memory/c/free
+  std::free(p);
 #else
   if (alignment <= alignof(std::max_align_t)) {
-    std_free(p);
+    std::free(p);
     return;
   }
 #if defined(LIBIMP_OS_WIN)

From 4d5939c513fcabdc0634592640d0b4aaa0905d6e Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 19 Nov 2022 17:13:52 +0800
Subject: [PATCH 098/272] upd: adjusting error output

---
 include/libimp/detect_plat.h         | 12 ++++++------
 src/libimp/codecvt.cpp               |  2 +-
 src/libimp/platform/posix/system.h   |  3 ++-
 src/libimp/platform/win/codecvt.h    |  8 ++++----
 src/libimp/platform/win/system.h     |  2 +-
 src/libipc/platform/posix/shm_impl.h | 11 ++++++-----
 src/libipc/platform/win/get_sa.h     |  4 ++--
 src/libipc/platform/win/mmap_impl.h  | 12 ++++++------
 src/libipc/platform/win/shm_impl.h   |  6 +++---
 src/libpmr/memory_resource.cpp       |  2 +-
 10 files changed, 32 insertions(+), 30 deletions(-)

diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
index 2e82655f..c34f6010 100644
--- a/include/libimp/detect_plat.h
+++ b/include/libimp/detect_plat.h
@@ -180,11 +180,11 @@
 ///      https://stackoverflow.com/questions/6487013/programmatically-determine-whether-exceptions-are-enabled
 #if defined(__cpp_exceptions) && __cpp_exceptions || \
     defined(__EXCEPTIONS) || defined(_CPPUNWIND)
-# define LIBIMP_TRY         try
-# define LIBIMP_CATCH(...)  catch(__VA_ARGS__)
-# define LIBIMP_THROW(...)  throw __VA_ARGS__
+# define LIBIMP_TRY                     try
+# define LIBIMP_CATCH(...)              catch (__VA_ARGS__)
+# define LIBIMP_THROW($exception, $ret) throw $exception
 #else
-# define LIBIMP_TRY        if (true)
-# define LIBIMP_CATCH(...) else if (false)
-# define LIBIMP_THROW(...)
+# define LIBIMP_TRY                     if (true)
+# define LIBIMP_CATCH(...)              else if (false)
+# define LIBIMP_THROW($exception, $ret) return $ret
 #endif
\ No newline at end of file
diff --git a/src/libimp/codecvt.cpp b/src/libimp/codecvt.cpp
index 417b704b..96ee8ca3 100644
--- a/src/libimp/codecvt.cpp
+++ b/src/libimp/codecvt.cpp
@@ -24,7 +24,7 @@ LIBIMP_NAMESPACE_BEG_
  * @see https://codingtidbit.com/2020/02/09/c17-codecvt_utf8-is-deprecated/
  *      https://stackoverflow.com/questions/42946335/deprecated-header-codecvt-replacement
  *      https://en.cppreference.com/w/cpp/locale/codecvt/in
- */
+*/
 namespace {
 
 /// @brief X-bit unicode transformation format
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index f0e285b1..b9ccd399 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -46,7 +46,8 @@ std::string error_str(result_code code) noexcept {
 #if ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE)
   LIBIMP_LOG_();
   if (::strerror_r((int)code.value(), msg_buf, sizeof(msg_buf)) != 0) {
-    log.error("strerror_r fails. error = {}", error_code());
+    log.error("failed: strerror_r(code = {}, buf, buf-size = {}). error = {}", 
+             (int)code.value(), sizeof(msg_buf), error_code());
     return {};
   }
   return msg_buf;
diff --git a/src/libimp/platform/win/codecvt.h b/src/libimp/platform/win/codecvt.h
index 8d865a77..abca9097 100644
--- a/src/libimp/platform/win/codecvt.h
+++ b/src/libimp/platform/win/codecvt.h
@@ -36,7 +36,7 @@ std::size_t cvt_cstr(char const *src, std::size_t slen, wchar_t *des, std::size_
   int cch_wc = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::MultiByteToWideChar(CP_ACP, 0, src, (int)slen, des, cch_wc);
   if (size_needed <= 0) {
-    log.error("MultiByteToWideChar fails. error = {}", sys::error_code());
+    log.error("failed: MultiByteToWideChar(CP_ACP). error = {}", sys::error_code());
   }
   return size_needed;
 }
@@ -51,7 +51,7 @@ std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char *des, std::size_
   int cb_mb = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::WideCharToMultiByte(CP_ACP, 0, src, (int)slen, des, cb_mb, NULL, NULL);
   if (size_needed <= 0) {
-    log.error("WideCharToMultiByte fails. error = {}", sys::error_code());
+    log.error("failed: WideCharToMultiByte(CP_ACP). error = {}", sys::error_code());
   }
   return size_needed;
 }
@@ -73,7 +73,7 @@ std::size_t cvt_cstr(char8_t const *src, std::size_t slen, wchar_t *des, std::si
   int cch_wc = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::MultiByteToWideChar(CP_UTF8, 0, (char *)src, (int)slen, des, cch_wc);
   if (size_needed <= 0) {
-    log.error("MultiByteToWideChar fails. error = {}", sys::error_code());
+    log.error("failed: MultiByteToWideChar(CP_UTF8). error = {}", sys::error_code());
   }
   return size_needed;
 }
@@ -88,7 +88,7 @@ std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char8_t *des, std::si
   int cb_mb = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::WideCharToMultiByte(CP_UTF8, 0, src, (int)slen, (char *)des, cb_mb, NULL, NULL);
   if (size_needed <= 0) {
-    log.error("WideCharToMultiByte fails. error = {}", sys::error_code());
+    log.error("failed: WideCharToMultiByte(CP_UTF8). error = {}", sys::error_code());
   }
   return size_needed;
 }
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index 6ad86a6c..58dbda89 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -58,7 +58,7 @@ std::string error_str(result_code code) noexcept {
           MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
           (LPTSTR)&lpErrText,
           0, NULL) == 0) {
-      log.error("FormatMessage fails. error = {}", error_code());
+      log.error("failed: FormatMessage(dwMessageId = {}). error = {}", err, error_code());
       return {};
     }
     LIBIMP_UNUSED auto buf_guard = std::unique_ptr<std::remove_pointer_t<LPVOID>, 
diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
index f5e23e6d..76732005 100644
--- a/src/libipc/platform/posix/shm_impl.h
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -84,7 +84,7 @@ result_code ftruncate_fd(int fd, std::size_t size) noexcept {
   /// @see https://man7.org/linux/man-pages/man3/ftruncate.3p.html
   if (::ftruncate(fd, size) != posix::succ) {
     auto err = sys::error();
-    log.error("ftruncate({}, {}) fails. error = {}", fd, size, err);
+    log.error("failed: ftruncate({}, {}). error = {}", fd, size, err);
     return err.code();
   }
   return {posix::succ};
@@ -102,7 +102,8 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   auto fd = shm_open_fd(name, type);
   if (!fd) return {};
   if (*fd == posix::failed) {
-    log.error("shm_open fails. error = {}", sys::error());
+    log.error("failed: shm_open(name = {}, type = {}). error = {}", 
+               name, type, sys::error());
     return {};
   }
   LIBIMP_UNUSED auto guard = std::unique_ptr<decltype(fd), void (*)(decltype(fd) *)> {
@@ -113,7 +114,7 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   /// @brief Try to get the size of this fd
   struct stat st;
   if (::fstat(*fd, &st) == posix::failed) {
-    log.error("fstat fails. error = {}", sys::error());
+    log.error("failed: fstat(fd = {}). error = {}", *fd, sys::error());
     return {};
   }
 
@@ -131,7 +132,7 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   /// @brief Creates a new mapping in the virtual address space of the calling process.
   void *mem = ::mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_SHARED, *fd, 0);
   if (mem == MAP_FAILED) {
-    log.error("mmap fails. error = {}", sys::error());
+    log.error("failed: mmap(size = {}, fd = {}). error = {}", size, *fd, sys::error());
     return {};
   }
   return new shm_handle{std::move(name), size, mem};
@@ -146,7 +147,7 @@ result_code shm_close(shm_t h) noexcept {
   if (shm == nullptr) return {};
   if (::munmap(shm->memp, shm->f_sz) == posix::failed) {
     auto err = sys::error();
-    log.error("munmap({}, {}) fails. error = {}", shm->memp, shm->f_sz, err);
+    log.error("failed: munmap({}, {}). error = {}", shm->memp, shm->f_sz, err);
     return err.code();
   }
   /// @brief no unlink the file.
diff --git a/src/libipc/platform/win/get_sa.h b/src/libipc/platform/win/get_sa.h
index 78bae679..c605c2c8 100644
--- a/src/libipc/platform/win/get_sa.h
+++ b/src/libipc/platform/win/get_sa.h
@@ -30,11 +30,11 @@ inline LPSECURITY_ATTRIBUTES get_sa() {
       using namespace ::LIBIMP_;
       log::gripper log {"get_sa"};
       if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
-        log.error("InitializeSecurityDescriptor fails. error = {}", sys::error());
+        log.error("failed: InitializeSecurityDescriptor(SECURITY_DESCRIPTOR_REVISION). error = {}", sys::error());
         return;
       }
       if (!::SetSecurityDescriptorDacl(&sd_, TRUE, NULL, FALSE)) {
-        log.error("SetSecurityDescriptorDacl fails. error = {}", sys::error());
+        log.error("failed: SetSecurityDescriptorDacl. error = {}", sys::error());
         return;
       }
       sa_.nLength = sizeof(SECURITY_ATTRIBUTES);
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index 8d0d4bad..f2cf9296 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -41,7 +41,7 @@ result_code mmap_close(HANDLE h) {
   }
   if (!::CloseHandle(h)) {
     auto err = sys::error();
-    log.error("CloseHandle({}) fails. error = {}", h, err);
+    log.error("failed: CloseHandle({}). error = {}", h, err);
     return err.code();
   }
   return {ERROR_SUCCESS};
@@ -77,7 +77,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     HANDLE h = ::OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, t_name.c_str());
     if (h == NULL) {
       auto err = sys::error();
-      log.error("OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, {}) fails. error = {}", file, err);
+      log.error("failed: OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, {}). error = {}", file, err);
       return {nullptr, err.value()};
     }
     return h;
@@ -90,7 +90,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
                                    0, static_cast<DWORD>(size), t_name.c_str());
     if (h == NULL) {
       auto err = sys::error();
-      log.error("CreateFileMapping(PAGE_READWRITE | SEC_COMMIT, {}, {}) fails. error = {}", size, file, err);
+      log.error("failed: CreateFileMapping(PAGE_READWRITE | SEC_COMMIT, {}, {}). error = {}", size, file, err);
       return {nullptr, err.value()};
     }
     return h;
@@ -132,7 +132,7 @@ result<LPVOID> mmap_memof(HANDLE h) {
   LPVOID mem = ::MapViewOfFile(h, FILE_MAP_ALL_ACCESS, 0, 0, 0);
   if (mem == NULL) {
     auto err = sys::error();
-    log.error("MapViewOfFile({}, FILE_MAP_ALL_ACCESS) fails. error = {}", h, err);
+    log.error("failed: MapViewOfFile({}, FILE_MAP_ALL_ACCESS). error = {}", h, err);
     return {nullptr, err.value()};
   }
   return mem;
@@ -151,7 +151,7 @@ result<SIZE_T> mmap_sizeof(LPCVOID mem) {
   MEMORY_BASIC_INFORMATION mem_info {};
   if (::VirtualQuery(mem, &mem_info, sizeof(mem_info)) == 0) {
     auto err = sys::error();
-    log.error("VirtualQuery({}) fails. error = {}", mem, err);
+    log.error("failed: VirtualQuery({}). error = {}", mem, err);
     return {false, (SIZE_T)err.value()};
   }
   return mem_info.RegionSize;
@@ -172,7 +172,7 @@ result_code mmap_release(HANDLE h, LPCVOID mem) {
     return {};
   }
   if (!::UnmapViewOfFile(mem)) {
-    log.warning("UnmapViewOfFile fails. error = {}", sys::error());
+    log.warning("failed: UnmapViewOfFile. error = {}", sys::error());
   }
   return mmap_close(h);
 }
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index fa23f462..56059f50 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -21,18 +21,18 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   LIBIMP_LOG_();
   auto h = mmap_open(name, size, type);
   if (h == NULL) {
-    log.error("mmap_open failed.");
+    log.error("failed: mmap_open(name = {}, size = {}, type = {}).", name, size, type);
     return {nullptr, h.code_value()};
   }
   auto mem = mmap_memof(*h);
   if (*mem == NULL) {
-    log.error("mmap_memof failed.");
+    log.error("failed: mmap_memof({}).", *h);
     mmap_close(*h);
     return {nullptr, mem.code_value()};
   }
   auto sz = mmap_sizeof(*mem);
   if (!sz) {
-    log.error("mmap_sizeof failed.");
+    log.error("failed: mmap_sizeof({}).", *mem);
     mmap_close(*h);
     return {nullptr, static_cast<result_type>(sz.value())};
   }
diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
index 6f7c52d2..a74dd35e 100644
--- a/src/libpmr/memory_resource.cpp
+++ b/src/libpmr/memory_resource.cpp
@@ -66,7 +66,7 @@ void *new_delete_resource::allocate(std::size_t bytes, std::size_t alignment) no
   void *p = nullptr;
   int ret = ::posix_memalign(&p, alignment, bytes);
   if (ret != 0) {
-    log.error("posix_memalign(alignment = {}, bytes = {}) fails. error = {}", 
+    log.error("failed: posix_memalign(alignment = {}, bytes = {}). error = {}", 
                alignment, bytes, sys::error(ret));
     return nullptr;
   }

From 6c9926bb93f7d0512bdfe83fe049b178e4dba2ce Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 19 Nov 2022 17:16:11 +0800
Subject: [PATCH 099/272] add: [concur] producer-consumer implementation (TBD)

---
 include/libconcur/concurrent.h         | 220 ++++++++++++++++++++++++-
 include/libconcur/element.h            |  76 +++++++++
 include/libconcur/queue.h              |  16 ++
 test/CMakeLists.txt                    |   1 +
 test/concur/test_concur_concurrent.cpp |  82 +++++++++
 test/concur/test_concur_queue.cpp      |   4 +
 test/test_concur_concurrent.cpp        |  16 --
 7 files changed, 391 insertions(+), 24 deletions(-)
 create mode 100644 include/libconcur/element.h
 create mode 100644 include/libconcur/queue.h
 create mode 100644 test/concur/test_concur_concurrent.cpp
 create mode 100644 test/concur/test_concur_queue.cpp
 delete mode 100644 test/test_concur_concurrent.cpp

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index 8d46d743..476e3847 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -6,26 +6,230 @@
  */
 #pragma once
 
+#include <type_traits>
+#include <atomic>
 #include <cstdint>
-#include <limits>
+
+#include "libimp/span.h"
 
 #include "libconcur/def.h"
+#include "libconcur/element.h"
 
 LIBCONCUR_NAMESPACE_BEG_
 
 /// @brief The queue index type.
 using index_t = std::uint32_t;
 
-namespace state {
+/// @brief Multiplicity of the relationship.
+namespace relation {
+
+class single {};
+class multi  {};
+
+} // namespace relation
+
+/// @brief Transmission mode
+namespace trans {
+
+class unicast   {};
+class broadcast {};
 
-/// @brief The state flag type for the queue element.
-using flag_t = std::uint64_t;
+} // namespace trans
 
-enum : flag_t {
-  /// @brief The invalid state value.
-  invalid_value = (std::numeric_limits<flag_t>::max)(),
+/// @brief Determines whether type T can be implicitly converted to type U.
+template <typename T, typename U>
+using is_convertible = typename std::enable_if<std::is_convertible<T *, U *>::value>::type;
+
+/// @brief Check whether the context type is valid.
+template <typename T>
+using is_context = decltype(typename std::enable_if<std::is_convertible<decltype(
+  std::declval<T>().valid()), bool>::value>::type(), 
+  std::declval<index_t>() % std::declval<T>().circ_size);
+
+/**
+ * @brief Calculate the corresponding queue position modulo the index value.
+ * 
+ * @tparam C a context type
+ * @param ctx a context object
+ * @param idx a context array index
+ * @return index_t - a corresponding queue position
+ */
+template <typename C, typename = is_context<C>>
+constexpr index_t trunc_index(C const &ctx, index_t idx) noexcept {
+  /// @remark `circ_size == 2^N` => `idx & (circ_size - 1)`
+  return ctx.valid() ? (idx % ctx.circ_size) : 0;
+}
+
+/// @brief Producer algorithm implementation.
+template <typename TransModT, typename RelationT>
+struct producer;
+
+/// @brief Consumer algorithm implementation.
+template <typename TransModT, typename RelationT>
+struct consumer;
+
+/**
+ * @brief Algorithm definition under unicast transmission model.
+ * 
+ * @ref A bounded wait-free(almost) zero-copy MPMC queue written in C++11.
+ * Modified from MengRao/WFMPMC.
+ * Copyright (c) 2018. Meng Rao (https://github.com/MengRao/WFMPMC).
+*/
+
+/// @brief Single-write producer model implementation.
+template <>
+struct producer<trans::unicast, relation::single> {
+
+  struct context_impl {
+    /// @brief Write index.
+    alignas(cache_line_size) index_t w_idx {0};
+  };
+
+  template <typename T, typename C, typename U, 
+            typename = is_context<C>,
+            typename = is_convertible<C, context_impl>>
+  static bool enqueue(::LIBIMP_::span<element<T>> elems, C &ctx, U &&src) noexcept {
+    auto w_idx = ctx.w_idx;
+    auto w_cur = trunc_index(ctx, w_idx);
+    auto &elem = elems[w_cur];
+    auto f_ct  = elem.get_flag();
+    /// @remark Verify index.
+    if ((f_ct != state::invalid_value) && 
+        (f_ct != static_cast<state::flag_t>(w_idx))) {
+      return false; // full
+    }
+    /// @remark Get a valid index and iterate backwards.
+    ctx.w_idx += 1;
+    /// @remark Set data & flag.
+    elem.set_data(std::forward<U>(src));
+    elem.set_flag(static_cast<state::flag_t>(~w_idx));
+    return true;
+  }
 };
 
-} // namespace state
+/// @brief Multi-write producer model implementation.
+template <>
+struct producer<trans::unicast, relation::multi> {
+
+  struct context_impl {
+    /// @brief Write index.
+    alignas(cache_line_size) std::atomic<index_t> w_idx {0};
+  };
+
+  template <typename T, typename C, typename U, 
+            typename = is_context<C>,
+            typename = is_convertible<C, context_impl>>
+  static bool enqueue(::LIBIMP_::span<element<T>> elems, C &ctx, U &&src) noexcept {
+    auto w_idx = ctx.w_idx.load(std::memory_order_acquire);
+    for (;;) {
+      auto w_cur = trunc_index(ctx, w_idx);
+      auto &elem = elems[w_cur];
+      auto f_ct  = elem.get_flag();
+      /// @remark Verify index.
+      if ((f_ct != state::invalid_value) && 
+          (f_ct != w_idx)) {
+        return false; // full
+      }
+      /// @remark Get a valid index and iterate backwards.
+      if (!ctx.w_idx.compare_exchange_week(w_idx, w_idx + 1, std::memory_order_acq_rel)) {
+        continue;
+      }
+      /// @remark Set data & flag.
+      elem.set_data(std::forward<U>(src));
+      elem.set_flag(~w_idx);
+      return true;
+    }
+  }
+};
+
+/// @brief Single-read consumer model implementation.
+template <>
+struct consumer<trans::unicast, relation::single> {
+
+  struct context_impl {
+    /// @brief Read index.
+    alignas(cache_line_size) index_t r_idx {0};
+  };
+
+  template <typename T, typename C, typename U, 
+            typename = is_context<C>,
+            typename = is_convertible<C, context_impl>>
+  static bool dequeue(::LIBIMP_::span<element<T>> elems, C &ctx, U &des) noexcept {
+    auto r_idx = ctx.r_idx;
+    auto r_cur = trunc_index(ctx, r_idx);
+    auto &elem = elems[r_cur];
+    auto f_ct  = elem.get_flag();
+    /// @remark Verify index.
+    if (f_ct != ~r_idx) {
+      return false; // empty
+    }
+    /// @remark Get a valid index and iterate backwards.
+    ctx.r_idx += 1;
+    /// @remark Get data & set flag.
+    des = elem.get_data();
+    elem.set_flag(r_idx + static_cast<index_t>(elems.size()));
+    return true;
+  }
+};
+
+/// @brief Multi-read consumer model implementation.
+template <>
+struct consumer<trans::unicast, relation::multi> {
+
+  struct context_impl {
+    /// @brief Read index.
+    alignas(cache_line_size) std::atomic<index_t> r_idx {0};
+  };
+
+  template <typename T, typename C, typename U, 
+            typename = is_context<C>,
+            typename = is_convertible<C, context_impl>>
+  static bool dequeue(::LIBIMP_::span<element<T>> elems, C &ctx, U &des) noexcept {
+    auto r_idx = ctx.r_idx.load(std::memory_order_acquire);
+    for (;;) {
+      auto r_cur = trunc_index(ctx, r_idx);
+      auto &elem = elems[r_cur];
+      auto f_ct  = elem.get_flag();
+      /// @remark Verify index.
+      if (f_ct != ~r_idx) {
+        return false; // empty
+      }
+      /// @remark Get a valid index and iterate backwards.
+      if (!ctx.r_idx.compare_exchange_week(r_idx, r_idx + 1, std::memory_order_acq_rel)) {
+        continue;
+      }
+      /// @remark Get data & set flag.
+      des = elem.get_data();
+      elem.set_flag(r_idx + static_cast<index_t>(elems.size()));
+      return true;
+    }
+  }
+};
+
+/**
+ * @brief Producer-consumer implementation.
+ * 
+ * @tparam TransModT transmission mode (trans::unicast/trans::broadcast)
+ * @tparam ProdModT producer relationship model (relation::single/relation::multi)
+ * @tparam ConsModT consumer relationship model (relation::single/relation::multi)
+ */
+template <typename TransModT, typename ProdModT, typename ConsModT>
+struct prod_cons : producer<TransModT, ProdModT>
+                 , consumer<TransModT, ConsModT> {
+  
+  /// @brief Mixing producer and consumer context definitions.
+  struct context : producer<TransModT, ProdModT>::context_impl
+                 , consumer<TransModT, ConsModT>::context_impl {
+    index_t const circ_size;
+
+    constexpr context(index_t cs) noexcept
+      : circ_size(cs) {}
+
+    constexpr bool valid() const noexcept {
+      /// @remark circ_size must be a power of two.
+      return (circ_size > 1) && ((circ_size & (circ_size - 1)) == 0);
+    }
+  };
+};
 
 LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/element.h b/include/libconcur/element.h
new file mode 100644
index 00000000..b45dd284
--- /dev/null
+++ b/include/libconcur/element.h
@@ -0,0 +1,76 @@
+/**
+ * @file libconcur/element.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define concurrent queue element abstraction.
+ * @date 2022-11-19
+ */
+#pragma once
+
+#include <atomic>
+#include <utility>
+#include <limits>   // std::numeric_limits
+#include <cstdint>
+#include <exception>
+
+#include "libimp/detect_plat.h"
+#include "libimp/log.h"
+
+#include "libconcur/def.h"
+
+LIBCONCUR_NAMESPACE_BEG_
+namespace state {
+
+/// @brief The state flag type for the queue element.
+using flag_t = std::uint64_t;
+
+enum : flag_t {
+  /// @brief The invalid state value.
+  invalid_value = (std::numeric_limits<flag_t>::max)(),
+};
+
+} // namespace state
+
+template <typename T>
+class element {
+  /// @brief Committed flag.
+  alignas(cache_line_size) std::atomic<state::flag_t> f_ct_;
+  /// @brief The user data segment.
+  T data_;
+
+  /// @brief Disable copy & move.
+  element(element const &) = delete;
+  element &operator=(element const &) = delete;
+
+public:
+  template <typename... A>
+  element(A &&... args) 
+    noexcept(noexcept(T{std::forward<A>(args)...}))
+    : f_ct_{state::invalid_value}
+    , data_{std::forward<A>(args)...} {}
+
+  template <typename U>
+  void set_data(U &&src) noexcept {
+    LIBIMP_LOG_();
+    LIBIMP_TRY {
+      data_ = std::forward<U>(src);
+    } LIBIMP_CATCH(std::exception const &e) {
+      log.error("failed: `data = std::forward<U>(src)`. error = {}", e.what());
+    } LIBIMP_CATCH(...) {
+      log.error("failed: `data = std::forward<U>(src)`. error = unknown");
+    }
+  }
+
+  T &&get_data() noexcept {
+    return std::move(data_);
+  }
+
+  void set_flag(state::flag_t flag) noexcept {
+    f_ct_.store(flag, std::memory_order_release);
+  }
+
+  state::flag_t get_flag() const noexcept {
+    return f_ct_.load(std::memory_order_acquire);
+  }
+};
+
+LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/queue.h b/include/libconcur/queue.h
new file mode 100644
index 00000000..485045b4
--- /dev/null
+++ b/include/libconcur/queue.h
@@ -0,0 +1,16 @@
+/**
+ * @file libconcur/queue.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Define concurrent queue.
+ * @date 2022-11-19
+ */
+#pragma once
+
+#include "libconcur/def.h"
+#include "libconcur/element.h"
+
+LIBCONCUR_NAMESPACE_BEG_
+
+
+
+LIBCONCUR_NAMESPACE_END_
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 76cfa6ac..f534f3fc 100755
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -16,6 +16,7 @@ include_directories(
 file(GLOB SRC_FILES
   ${LIBIPC_PROJECT_DIR}/test/imp/*.cpp
   ${LIBIPC_PROJECT_DIR}/test/pmr/*.cpp
+  ${LIBIPC_PROJECT_DIR}/test/concur/*.cpp
   ${LIBIPC_PROJECT_DIR}/test/*.cpp)
 
 file(GLOB HEAD_FILES
diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
new file mode 100644
index 00000000..e07a3f1a
--- /dev/null
+++ b/test/concur/test_concur_concurrent.cpp
@@ -0,0 +1,82 @@
+
+#include <iostream>
+#include <cstddef>
+
+#include "gtest/gtest.h"
+
+#include "libconcur/concurrent.h"
+
+TEST(concurrent, cache_line_size) {
+  std::cout << concur::cache_line_size << "\n";
+  EXPECT_TRUE(concur::cache_line_size >= alignof(std::max_align_t));
+}
+
+TEST(concurrent, index_and_flag) {
+  EXPECT_TRUE(sizeof(concur::index_t) < sizeof(concur::state::flag_t));
+}
+
+TEST(concurrent, trunc_index) {
+  struct context {
+    concur::index_t circ_size;
+
+    bool valid() const noexcept {
+      return (circ_size > 1) && ((circ_size & (circ_size - 1)) == 0);
+    }
+  };
+
+  /// @brief circ-size = 0
+  EXPECT_EQ(concur::trunc_index(context{0}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(context{0}, 1), 0);
+  EXPECT_EQ(concur::trunc_index(context{0}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(context{0}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(context{0}, 111), 0);
+  EXPECT_EQ(concur::trunc_index(context{0}, -1), 0);
+
+  /// @brief circ-size = 1
+  EXPECT_EQ(concur::trunc_index(context{1}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(context{1}, 1), 0);
+  EXPECT_EQ(concur::trunc_index(context{1}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(context{1}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(context{1}, 111), 0);
+  EXPECT_EQ(concur::trunc_index(context{1}, -1), 0);
+
+  /// @brief circ-size = 2
+  EXPECT_EQ(concur::trunc_index(context{2}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(context{2}, 1), 1);
+  EXPECT_EQ(concur::trunc_index(context{2}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(context{2}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(context{2}, 111), 1);
+  EXPECT_EQ(concur::trunc_index(context{2}, -1), 1);
+
+  /// @brief circ-size = 10
+  EXPECT_EQ(concur::trunc_index(context{10}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(context{10}, 1), 0);
+  EXPECT_EQ(concur::trunc_index(context{10}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(context{10}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(context{10}, 111), 0);
+  EXPECT_EQ(concur::trunc_index(context{10}, -1), 0);
+
+  /// @brief circ-size = 16
+  EXPECT_EQ(concur::trunc_index(context{16}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(context{16}, 1), 1);
+  EXPECT_EQ(concur::trunc_index(context{16}, 2), 2);
+  EXPECT_EQ(concur::trunc_index(context{16}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(context{16}, 111), 15);
+  EXPECT_EQ(concur::trunc_index(context{16}, -1), 15);
+
+  /// @brief circ-size = (index_t)-1
+  EXPECT_EQ(concur::trunc_index(context{(concur::index_t)-1}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(context{(concur::index_t)-1}, 1), 0);
+  EXPECT_EQ(concur::trunc_index(context{(concur::index_t)-1}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(context{(concur::index_t)-1}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(context{(concur::index_t)-1}, 111), 0);
+  EXPECT_EQ(concur::trunc_index(context{(concur::index_t)-1}, -1), 0);
+
+  /// @brief circ-size = 2147483648 (2^31)
+  EXPECT_EQ(concur::trunc_index(context{2147483648u}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(context{2147483648u}, 1), 1);
+  EXPECT_EQ(concur::trunc_index(context{2147483648u}, 2), 2);
+  EXPECT_EQ(concur::trunc_index(context{2147483648u}, 16), 16);
+  EXPECT_EQ(concur::trunc_index(context{2147483648u}, 111), 111);
+  EXPECT_EQ(concur::trunc_index(context{2147483648u}, -1), 2147483647);
+}
\ No newline at end of file
diff --git a/test/concur/test_concur_queue.cpp b/test/concur/test_concur_queue.cpp
new file mode 100644
index 00000000..e05c1b1d
--- /dev/null
+++ b/test/concur/test_concur_queue.cpp
@@ -0,0 +1,4 @@
+
+#include "gtest/gtest.h"
+
+#include "libconcur/queue.h"
diff --git a/test/test_concur_concurrent.cpp b/test/test_concur_concurrent.cpp
deleted file mode 100644
index df8e3a7e..00000000
--- a/test/test_concur_concurrent.cpp
+++ /dev/null
@@ -1,16 +0,0 @@
-
-#include <iostream>
-#include <cstddef>
-
-#include "gtest/gtest.h"
-
-#include "libconcur/concurrent.h"
-
-TEST(concurrent, cache_line_size) {
-  std::cout << concur::cache_line_size << "\n";
-  EXPECT_TRUE(concur::cache_line_size >= alignof(std::max_align_t));
-}
-
-TEST(concurrent, index_and_flag) {
-  EXPECT_TRUE(sizeof(concur::index_t) < sizeof(concur::state::flag_t));
-}
\ No newline at end of file

From 093597ca669d8c27ede26588bed51c45cdec841c Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 19 Nov 2022 22:10:42 +0800
Subject: [PATCH 100/272] upd: [imp] optimized log implementation

---
 include/libimp/log.h      | 88 +++++++++++++++++++++++++--------------
 src/libimp/log.cpp        | 19 ++++++++-
 test/imp/test_imp_log.cpp | 46 +++++++++++---------
 3 files changed, 100 insertions(+), 53 deletions(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index bcca750f..532564b6 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -12,7 +12,6 @@
 #include <exception>
 
 #include "fmt/format.h"
-#include "fmt/chrono.h"
 
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
@@ -22,11 +21,6 @@
 LIBIMP_NAMESPACE_BEG_
 namespace log {
 
-template <typename Fmt, typename... A>
-std::string fmt(Fmt &&ft, A &&... args) {
-  return ::fmt::format(std::forward<Fmt>(ft), std::forward<A>(args)...);
-}
-
 enum class level : std::int32_t {
   trace,
   debug,
@@ -36,47 +30,79 @@ enum class level : std::int32_t {
   failed,
 };
 
+struct context {
+  log::level level;
+  std::chrono::system_clock::time_point tp;
+  char const *func;
+  std::string text;
+};
+
+LIBIMP_EXPORT std::string to_string(context &&) noexcept;
+
 } // namespace log
 
 namespace detail_log {
 
+enum out_type : unsigned {
+  out_none    = 0x0,
+  out_string  = 0x1,
+  out_context = 0x2,
+};
+
 template <typename T>
 class has_fn_output {
-  static std::false_type check(...);
+  static std::integral_constant<out_type, out_none> check(...);
+
   template <typename U>
-  static auto check(U *u) -> decltype(u->output(log::level::trace, std::declval<std::string>()), std::true_type{});
+  static auto check(U *u)
+    -> decltype(u->output(log::level::trace, std::declval<std::string>()), 
+                std::integral_constant<out_type, out_string>{});
+
+  template <typename U>
+  static auto check(U *u)
+    -> decltype(u->output(log::level::trace, std::declval<log::context>()), 
+                std::integral_constant<out_type, out_context>{});
 
 public:
   using type = decltype(check(static_cast<T *>(nullptr)));
 };
 
 template <typename T>
-constexpr bool has_fn_output_v = has_fn_output<T>::type::value;
+constexpr out_type has_fn_output_v = has_fn_output<T>::type::value;
 
 struct vtable_t {
-  void (*output)(void *, log::level, std::string &&);
+  void (*output)(void *, log::context &&);
 };
 
 template <typename T>
 class traits {
   template <typename U>
   static auto make_fn_output() noexcept
-    -> std::enable_if_t<has_fn_output_v<U>, void (*)(void *, log::level, std::string &&)> {
-    return [](void *p, log::level l, std::string &&s) {
-      static_cast<U *>(p)->output(l, std::move(s));
+    -> std::enable_if_t<(has_fn_output_v<U> == out_none), decltype(vtable_t{}.output)> {
+    return [](void *, log::context &&) {};
+  }
+
+  template <typename U>
+  static auto make_fn_output() noexcept
+    -> std::enable_if_t<(has_fn_output_v<U> == out_string), decltype(vtable_t{}.output)> {
+    return [](void *p, log::context &&ctx) {
+      auto lev = ctx.level;
+      auto str = to_string(std::move(ctx));
+      static_cast<U *>(p)->output(lev, std::move(str));
     };
   }
+
   template <typename U>
   static auto make_fn_output() noexcept
-    -> std::enable_if_t<!has_fn_output_v<U>, void (*)(void *, log::level, std::string &&)> {
-    return [](void *, log::level, std::string &&) {};
+    -> std::enable_if_t<(has_fn_output_v<U> == out_context), decltype(vtable_t{}.output)> {
+    return [](void *p, log::context &&ctx) {
+      static_cast<U *>(p)->output(std::move(ctx));
+    };
   }
 
 public:
   static auto make_vtable() noexcept {
-    static vtable_t vt {
-      make_fn_output<T>(),
-    };
+    static vtable_t vt { make_fn_output<T>() };
     return &vt;
   }
 };
@@ -93,15 +119,14 @@ class LIBIMP_EXPORT printer {
   printer() noexcept = default;
 
   template <typename T, 
-            /// @brief generic constructor may shadow the default copy constructor
+            /// @remark generic constructor may shadow the default copy constructor
             typename = std::enable_if_t<!std::is_same<printer, T>::value>>
   printer(T &p) noexcept
     : objp_  (static_cast<void *>(&p))
     , vtable_(detail_log::traits<T>::make_vtable()) {}
 
   explicit operator bool() const noexcept;
-
-  void output(log::level, std::string &&) noexcept;
+  void output(context) noexcept;
 };
 
 class LIBIMP_EXPORT std_t {
@@ -121,18 +146,19 @@ class gripper {
     if (!printer_ || (enum_cast(l) < enum_cast(level_limit_))) {
       return *this;
     }
-    constexpr static char types[] = {
-      'T', 'D', 'I', 'W', 'E', 'F'
-    };
-    try {
-      auto tp = std::chrono::system_clock::now();
-      auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(tp).time_since_epoch().count() % 1000;
-      auto px = fmt("[{}][{:%Y-%m-%d %H:%M:%S}.{:03}][{}] ", types[enum_cast(l)], tp, ms, func_);
-      printer_.output(l, std::move(px += fmt(std::forward<Fmt>(ft), std::forward<A>(args)...)));
-    } catch (std::exception const &e) {
+    context ctx;
+    LIBIMP_TRY {
+      ctx = {
+        l, std::chrono::system_clock::now(), func_,
+        ::fmt::format(std::forward<Fmt>(ft), std::forward<A>(args)...),
+      };
+    } LIBIMP_CATCH(std::exception const &e) {
       /// @remark [TBD] std::string constructor may throw an exception
-      printer_.output(level::failed, e.what());
+      ctx = {
+        level::failed, std::chrono::system_clock::now(), func_, e.what(),
+      };
     }
+    printer_.output(std::move(ctx));
     return *this;
   }
 
diff --git a/src/libimp/log.cpp b/src/libimp/log.cpp
index aa10dca5..c12043e5 100644
--- a/src/libimp/log.cpp
+++ b/src/libimp/log.cpp
@@ -2,18 +2,33 @@
 #include <utility>
 #include <cstdio>
 
+#include "fmt/chrono.h"
+
 #include "libimp/log.h"
 
 LIBIMP_NAMESPACE_BEG_
 namespace log {
 
+std::string to_string(context &&ctx) noexcept {
+  constexpr static char types[] = {
+    'T', 'D', 'I', 'W', 'E', 'F',
+  };
+  LIBIMP_TRY {
+    auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(ctx.tp).time_since_epoch().count() % 1000;
+    return ::fmt::format("[{}][{:%Y-%m-%d %H:%M:%S}.{:03}][{}] {}", types[enum_cast(ctx.level)], ctx.tp, ms, ctx.func, ctx.text);
+  } LIBIMP_CATCH(std::exception const &e) {
+    /// @remark [TBD] std::string constructor may throw an exception
+    return e.what();
+  }
+}
+
 printer::operator bool() const noexcept {
   return (objp_ != nullptr) && (vtable_ != nullptr);
 }
 
-void printer::output(log::level l, std::string &&s) noexcept {
+void printer::output(context ctx) noexcept {
   if (!*this) return;
-  vtable_->output(objp_, l, std::move(s));
+  vtable_->output(objp_, std::move(ctx));
 }
 
 std_t std_out;
diff --git a/test/imp/test_imp_log.cpp b/test/imp/test_imp_log.cpp
index 69e7953b..6a005e71 100644
--- a/test/imp/test_imp_log.cpp
+++ b/test/imp/test_imp_log.cpp
@@ -1,21 +1,23 @@
 
+#include <iostream>
+
 #include "gtest/gtest.h"
 
 #include "libimp/log.h"
 
 TEST(log, detail) {
-  EXPECT_FALSE(imp::detail_log::has_fn_output_v<int>);
+  EXPECT_EQ(imp::detail_log::has_fn_output_v<int>, imp::detail_log::out_none);
 
   struct foo {
     int info(std::string);
   };
-  EXPECT_FALSE(imp::detail_log::has_fn_output_v<foo>);
+  EXPECT_EQ(imp::detail_log::has_fn_output_v<foo>, imp::detail_log::out_none);
 
   struct bar {
     int info(char const *);
     void output(imp::log::level, std::string &&);
   };
-  EXPECT_TRUE(imp::detail_log::has_fn_output_v<bar>);
+  EXPECT_EQ(imp::detail_log::has_fn_output_v<bar>, imp::detail_log::out_string);
 
   struct str {
     str(std::string const &);
@@ -23,25 +25,27 @@ TEST(log, detail) {
   struct foo_bar {
     void output(imp::log::level, str);
   };
-  EXPECT_TRUE(imp::detail_log::has_fn_output_v<foo_bar>);
+  EXPECT_EQ(imp::detail_log::has_fn_output_v<foo_bar>, imp::detail_log::out_string);
 
   auto vt_int = imp::detail_log::traits<int>::make_vtable();
   EXPECT_NE(vt_int, nullptr);
-  vt_int->output(nullptr, imp::log::level::debug, "123");
+  EXPECT_NO_THROW(vt_int->output(nullptr, imp::log::context{}));
 
   struct log {
     std::string what;
     void output(imp::log::level l, std::string &&s) {
-      if (l == imp::log::level::error) what += s;
+      if (l == imp::log::level::error) what += s + '\n';
     }
   } ll;
   auto vt_log = imp::detail_log::traits<log>::make_vtable();
   EXPECT_NE(vt_log, nullptr);
-  vt_log->output(&ll, imp::log::level::info , "123");
-  vt_log->output(&ll, imp::log::level::error, "321");
-  vt_log->output(&ll, imp::log::level::info , "654");
-  vt_log->output(&ll, imp::log::level::error, "456");
-  EXPECT_EQ(ll.what, "321456");
+
+  vt_log->output(&ll, imp::log::context{imp::log::level::info , std::chrono::system_clock::now(), __func__, "123"});
+  vt_log->output(&ll, imp::log::context{imp::log::level::error, std::chrono::system_clock::now(), __func__, "321"});
+  vt_log->output(&ll, imp::log::context{imp::log::level::info , std::chrono::system_clock::now(), __func__, "654"});
+  vt_log->output(&ll, imp::log::context{imp::log::level::error, std::chrono::system_clock::now(), __func__, "456"});
+  std::cout << ll.what << "\n";
+  SUCCEED();
 }
 
 TEST(log, log_printer) {
@@ -50,21 +54,22 @@ TEST(log, log_printer) {
     std::string e;
 
     void output(imp::log::level l, std::string &&s) {
-      if (l == imp::log::level::error) e += s;
-      else if (l == imp::log::level::info) i += s;
+      if (l == imp::log::level::error) e += s + "\n";
+      else if (l == imp::log::level::info) i += s + "\n";
     }
   } ll;
 
   imp::log::printer pt = ll;
-  pt.output(imp::log::level::info , "hello ");
-  pt.output(imp::log::level::error, "failed: ");
-  pt.output(imp::log::level::info , "log-pt");
-  pt.output(imp::log::level::error, "whatever");
-  EXPECT_EQ(ll.i, "hello log-pt");
-  EXPECT_EQ(ll.e, "failed: whatever");
+  pt.output({imp::log::level::info , std::chrono::system_clock::now(), __func__, "hello "});
+  pt.output({imp::log::level::error, std::chrono::system_clock::now(), __func__, "failed: "});
+  pt.output({imp::log::level::info , std::chrono::system_clock::now(), __func__, "log-pt"});
+  pt.output({imp::log::level::error, std::chrono::system_clock::now(), __func__, "whatever"});
+  std::cout << ll.i << "\n";
+  std::cout << ll.e << "\n";
 
   imp::log::printer ps = imp::log::std_out;
-  ps.output(imp::log::level::info, "hello world\n");
+  ps.output({imp::log::level::info, std::chrono::system_clock::now(), __func__, "hello world"});
+  SUCCEED();
 }
 
 TEST(log, gripper) {
@@ -76,4 +81,5 @@ TEST(log, gripper) {
     LIBIMP_LOG_();
     log.info("hello 2");
   }
+  SUCCEED();
 }
\ No newline at end of file

From 16c16ad3d01fe0438df892430cb6ba3621dd6105 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 19 Nov 2022 22:33:59 +0800
Subject: [PATCH 101/272] fix: error C2535 for vs2015

---
 benchmark/benchmark_log.cpp      |  4 ++--
 include/libimp/log.h             | 37 ++++++++++++++++----------------
 src/libipc/platform/win/get_sa.h |  2 +-
 src/libpmr/memory_resource.cpp   |  2 +-
 test/imp/test_imp_log.cpp        |  2 +-
 5 files changed, 24 insertions(+), 23 deletions(-)

diff --git a/benchmark/benchmark_log.cpp b/benchmark/benchmark_log.cpp
index 549bbb83..e7db3623 100644
--- a/benchmark/benchmark_log.cpp
+++ b/benchmark/benchmark_log.cpp
@@ -6,14 +6,14 @@
 namespace {
 
 void BM_imp_log_no_output(benchmark::State& state) {
-  imp::log::gripper log {__func__, {}};
+  imp::log::grip log {__func__, {}};
   for (auto _ : state) {
     log.debug("hello log.");
   }
 }
 
 void BM_imp_log_gripper(benchmark::State& state) {
-  imp::log::gripper log {__func__, {}};
+  imp::log::grip log {__func__, {}};
   for (auto _ : state) {
     log.info("hello log.");
   }
diff --git a/include/libimp/log.h b/include/libimp/log.h
index 532564b6..f0549a21 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -53,15 +53,11 @@ template <typename T>
 class has_fn_output {
   static std::integral_constant<out_type, out_none> check(...);
 
-  template <typename U>
-  static auto check(U *u)
-    -> decltype(u->output(log::level::trace, std::declval<std::string>()), 
-                std::integral_constant<out_type, out_string>{});
+  template <typename U, typename = decltype(u->output(log::level::trace, std::declval<std::string>()))>
+  static std::integral_constant<out_type, out_string> check(U *u);
 
-  template <typename U>
-  static auto check(U *u)
-    -> decltype(u->output(log::level::trace, std::declval<log::context>()), 
-                std::integral_constant<out_type, out_context>{});
+  template <typename U, typename = decltype(u->output(std::declval<log::context>()))>
+  static std::integral_constant<out_type, out_context> check(U *u);
 
 public:
   using type = decltype(check(static_cast<T *>(nullptr)));
@@ -129,20 +125,25 @@ class LIBIMP_EXPORT printer {
   void output(context) noexcept;
 };
 
+/// @brief Standard console output.
 class LIBIMP_EXPORT std_t {
 public:
   void output(log::level, std::string &&) noexcept;
 };
 
+/// @brief Standard console output object.
 LIBIMP_EXPORT extern std_t std_out;
 
-class gripper {
+/**
+ * @brief Log information grips.
+ */
+class grip {
   printer printer_;
   char const *func_;
   level level_limit_;
 
   template <typename Fmt, typename... A>
-  gripper &output(log::level l, Fmt &&ft, A &&... args) noexcept {
+  grip &output(log::level l, Fmt &&ft, A &&... args) noexcept {
     if (!printer_ || (enum_cast(l) < enum_cast(level_limit_))) {
       return *this;
     }
@@ -163,33 +164,33 @@ class gripper {
   }
 
 public:
-  gripper(char const *func, printer printer = std_out, level level_limit = level::info) noexcept 
+  grip(char const *func, printer printer = std_out, level level_limit = level::info) noexcept 
     : printer_    (printer)
     , func_       (func)
     , level_limit_(level_limit) {}
 
   template <typename Fmt, typename... A>
-  gripper &trace(Fmt &&ft, A &&... args) noexcept {
+  grip &trace(Fmt &&ft, A &&... args) noexcept {
     return output(log::level::trace, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
   template <typename Fmt, typename... A>
-  gripper &debug(Fmt &&ft, A &&... args) noexcept {
+  grip &debug(Fmt &&ft, A &&... args) noexcept {
     return output(log::level::debug, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
   template <typename Fmt, typename... A>
-  gripper &info(Fmt &&ft, A &&... args) noexcept {
+  grip &info(Fmt &&ft, A &&... args) noexcept {
     return output(log::level::info, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
   template <typename Fmt, typename... A>
-  gripper &warning(Fmt &&ft, A &&... args) noexcept {
+  grip &warning(Fmt &&ft, A &&... args) noexcept {
     return output(log::level::warning, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
   template <typename Fmt, typename... A>
-  gripper &error(Fmt &&ft, A &&... args) noexcept {
+  grip &error(Fmt &&ft, A &&... args) noexcept {
     return output(log::level::error, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
   template <typename Fmt, typename... A>
-  gripper &failed(Fmt &&ft, A &&... args) noexcept {
+  grip &failed(Fmt &&ft, A &&... args) noexcept {
     return output(log::level::failed, std::forward<Fmt>(ft), std::forward<A>(args)...);
   }
 };
@@ -197,4 +198,4 @@ class gripper {
 } // namespace log
 LIBIMP_NAMESPACE_END_
 
-#define LIBIMP_LOG_(...) ::LIBIMP_::log::gripper log {__func__, __VA_ARGS__}
\ No newline at end of file
+#define LIBIMP_LOG_(...) ::LIBIMP_::log::grip log {__func__, __VA_ARGS__}
\ No newline at end of file
diff --git a/src/libipc/platform/win/get_sa.h b/src/libipc/platform/win/get_sa.h
index c605c2c8..65c2edd5 100644
--- a/src/libipc/platform/win/get_sa.h
+++ b/src/libipc/platform/win/get_sa.h
@@ -28,7 +28,7 @@ inline LPSECURITY_ATTRIBUTES get_sa() {
 
     initiator() {
       using namespace ::LIBIMP_;
-      log::gripper log {"get_sa"};
+      log::grip log {"get_sa"};
       if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
         log.error("failed: InitializeSecurityDescriptor(SECURITY_DESCRIPTOR_REVISION). error = {}", sys::error());
         return;
diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
index a74dd35e..98f8a826 100644
--- a/src/libpmr/memory_resource.cpp
+++ b/src/libpmr/memory_resource.cpp
@@ -13,7 +13,7 @@ namespace {
 /**
  * @brief Check that bytes is not 0 and that the alignment is a power of two.
  */
-bool verify_args(::LIBIMP_::log::gripper &log, std::size_t bytes, std::size_t alignment) noexcept {
+bool verify_args(::LIBIMP_::log::grip &log, std::size_t bytes, std::size_t alignment) noexcept {
   if (bytes == 0) {
     return false;
   }
diff --git a/test/imp/test_imp_log.cpp b/test/imp/test_imp_log.cpp
index 6a005e71..c4852c02 100644
--- a/test/imp/test_imp_log.cpp
+++ b/test/imp/test_imp_log.cpp
@@ -74,7 +74,7 @@ TEST(log, log_printer) {
 
 TEST(log, gripper) {
   {
-    imp::log::gripper log {__func__};
+    imp::log::grip log {__func__};
     log.info("hello");
   }
   {

From 87279a1299ca6d0b718b3008dda0c97d32dbb531 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 19 Nov 2022 22:37:49 +0800
Subject: [PATCH 102/272] =?UTF-8?q?fix:=20=E2=80=98u=E2=80=99=20was=20not?=
 =?UTF-8?q?=20declared=20in=20this=20scope?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 include/libimp/log.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index f0549a21..df6bc1b1 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -53,10 +53,10 @@ template <typename T>
 class has_fn_output {
   static std::integral_constant<out_type, out_none> check(...);
 
-  template <typename U, typename = decltype(u->output(log::level::trace, std::declval<std::string>()))>
+  template <typename U, typename = decltype(std::declval<U &>().output(log::level::trace, std::declval<std::string>()))>
   static std::integral_constant<out_type, out_string> check(U *u);
 
-  template <typename U, typename = decltype(u->output(std::declval<log::context>()))>
+  template <typename U, typename = decltype(std::declval<U &>().output(std::declval<log::context>()))>
   static std::integral_constant<out_type, out_context> check(U *u);
 
 public:

From 5a46c3d93e188b02f887c7d241c650f50ef21e1f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 20 Nov 2022 14:33:45 +0800
Subject: [PATCH 103/272] upd: try-catch

---
 src/libimp/platform/win/system.h | 5 +++--
 src/libimp/system.cpp            | 4 ++--
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index 58dbda89..d8a199de 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -15,6 +15,7 @@
 #include "libimp/log.h"
 #include "libimp/codecvt.h"
 #include "libimp/enum_cast.h"
+#include "libimp/detect_plat.h"
 
 LIBIMP_NAMESPACE_BEG_
 namespace sys {
@@ -46,7 +47,7 @@ void error_code(result_code code) noexcept {
  */
 std::string error_str(result_code code) noexcept {
   LIBIMP_LOG_();
-  try {
+  LIBIMP_TRY {
     DWORD err = (DWORD)code.value();
     LPTSTR lpErrText = NULL;
     if (::FormatMessage(
@@ -73,7 +74,7 @@ std::string error_str(result_code code) noexcept {
     std::string ret(len, '\0');
     cvt_cstr(lpErrText, msg_len, &ret[0], ret.size());
     return ret;
-  } catch (std::exception const &e) {
+  } LIBIMP_CATCH(std::exception const &e) {
     log.failed(e.what());
   }
   return {};
diff --git a/src/libimp/system.cpp b/src/libimp/system.cpp
index 958d2cda..2c1296b0 100644
--- a/src/libimp/system.cpp
+++ b/src/libimp/system.cpp
@@ -11,9 +11,9 @@ LIBIMP_NAMESPACE_BEG_
 namespace sys {
 
 std::string error_msg(result_code code) noexcept {
-  try {
+  LIBIMP_TRY {
     return ::fmt::format("[{}, \"{}\"]", code.value(), error_str(code));
-  } catch (...) {
+  } LIBIMP_CATCH(...) {
     return error_str(code);
   }
 }

From 55a6b2daee8b7dd6261a11455a6a4a424147d814 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 20 Nov 2022 15:35:43 +0800
Subject: [PATCH 104/272] upd: [concur] preparing for broadcast transmission
 mode (TBD)

---
 include/libconcur/concurrent.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index 476e3847..2e3d9003 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -206,6 +206,30 @@ struct consumer<trans::unicast, relation::multi> {
   }
 };
 
+/**
+ * @brief Algorithm definition under broadcast transmission model.
+*/
+
+/// @brief Single-write producer model implementation.
+template <>
+struct producer<trans::broadcast, relation::single> {
+};
+
+/// @brief Multi-write producer model implementation.
+template <>
+struct producer<trans::broadcast, relation::multi> {
+};
+
+/// @brief Single-read consumer model implementation.
+template <>
+struct consumer<trans::broadcast, relation::single> {
+};
+
+/// @brief Multi-read consumer model implementation.
+template <>
+struct consumer<trans::broadcast, relation::multi> {
+};
+
 /**
  * @brief Producer-consumer implementation.
  * 

From 7f6bc22394651f3a2a63eef0f551fb7d7223ce53 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 26 Nov 2022 14:45:03 +0800
Subject: [PATCH 105/272] upd: FetchContent

---
 3rdparty/benchmark/.clang-format              |    5 -
 3rdparty/benchmark/.clang-tidy                |    7 -
 3rdparty/benchmark/.gitignore                 |   67 -
 3rdparty/benchmark/.travis.yml                |  208 -
 3rdparty/benchmark/.ycm_extra_conf.py         |  115 -
 3rdparty/benchmark/AUTHORS                    |   63 -
 3rdparty/benchmark/BUILD.bazel                |   52 -
 3rdparty/benchmark/CMakeLists.txt             |  342 -
 3rdparty/benchmark/CONTRIBUTING.md            |   58 -
 3rdparty/benchmark/CONTRIBUTORS               |   87 -
 3rdparty/benchmark/LICENSE                    |  202 -
 3rdparty/benchmark/README.md                  |  216 -
 3rdparty/benchmark/WORKSPACE                  |   44 -
 3rdparty/benchmark/_config.yml                |    2 -
 3rdparty/benchmark/appveyor.yml               |   50 -
 3rdparty/benchmark/bindings/python/BUILD      |    3 -
 .../benchmark/bindings/python/build_defs.bzl  |   25 -
 .../bindings/python/google_benchmark/BUILD    |   38 -
 .../python/google_benchmark/__init__.py       |  158 -
 .../python/google_benchmark/benchmark.cc      |  181 -
 .../python/google_benchmark/example.py        |  136 -
 .../benchmark/bindings/python/pybind11.BUILD  |   20 -
 .../bindings/python/python_headers.BUILD      |    6 -
 .../bindings/python/requirements.txt          |    2 -
 .../benchmark/cmake/AddCXXCompilerFlag.cmake  |   78 -
 .../benchmark/cmake/CXXFeatureCheck.cmake     |   69 -
 3rdparty/benchmark/cmake/Config.cmake.in      |    7 -
 3rdparty/benchmark/cmake/GetGitVersion.cmake  |   58 -
 3rdparty/benchmark/cmake/GoogleTest.cmake     |   48 -
 3rdparty/benchmark/cmake/GoogleTest.cmake.in  |   59 -
 .../benchmark/cmake/Modules/FindLLVMAr.cmake  |   16 -
 .../benchmark/cmake/Modules/FindLLVMNm.cmake  |   16 -
 .../cmake/Modules/FindLLVMRanLib.cmake        |   15 -
 .../benchmark/cmake/Modules/FindPFM.cmake     |   26 -
 3rdparty/benchmark/cmake/benchmark.pc.in      |   12 -
 3rdparty/benchmark/cmake/gnu_posix_regex.cpp  |   12 -
 3rdparty/benchmark/cmake/llvm-toolchain.cmake |    8 -
 3rdparty/benchmark/cmake/posix_regex.cpp      |   14 -
 3rdparty/benchmark/cmake/split_list.cmake     |    3 -
 3rdparty/benchmark/cmake/std_regex.cpp        |   10 -
 3rdparty/benchmark/cmake/steady_clock.cpp     |    7 -
 .../cmake/thread_safety_attributes.cpp        |    4 -
 3rdparty/benchmark/docs/AssemblyTests.md      |  147 -
 3rdparty/benchmark/docs/_config.yml           |    1 -
 3rdparty/benchmark/docs/dependencies.md       |   19 -
 3rdparty/benchmark/docs/index.md              |   10 -
 3rdparty/benchmark/docs/perf_counters.md      |   34 -
 .../platform_specific_build_instructions.md   |   48 -
 .../benchmark/docs/random_interleaving.md     |   13 -
 3rdparty/benchmark/docs/releasing.md          |   35 -
 3rdparty/benchmark/docs/tools.md              |  203 -
 3rdparty/benchmark/docs/user_guide.md         | 1200 ---
 .../benchmark/include/benchmark/benchmark.h   | 1765 ----
 3rdparty/benchmark/requirements.txt           |    3 -
 3rdparty/benchmark/setup.py                   |  143 -
 3rdparty/benchmark/src/CMakeLists.txt         |  159 -
 3rdparty/benchmark/src/arraysize.h            |   33 -
 3rdparty/benchmark/src/benchmark.cc           |  626 --
 .../benchmark/src/benchmark_api_internal.cc   |  112 -
 .../benchmark/src/benchmark_api_internal.h    |   84 -
 3rdparty/benchmark/src/benchmark_main.cc      |   17 -
 3rdparty/benchmark/src/benchmark_name.cc      |   58 -
 3rdparty/benchmark/src/benchmark_register.cc  |  492 --
 3rdparty/benchmark/src/benchmark_register.h   |  108 -
 3rdparty/benchmark/src/benchmark_runner.cc    |  359 -
 3rdparty/benchmark/src/benchmark_runner.h     |  104 -
 3rdparty/benchmark/src/check.h                |   90 -
 3rdparty/benchmark/src/colorprint.cc          |  188 -
 3rdparty/benchmark/src/colorprint.h           |   33 -
 3rdparty/benchmark/src/commandlineflags.cc    |  285 -
 3rdparty/benchmark/src/commandlineflags.h     |  116 -
 3rdparty/benchmark/src/complexity.cc          |  244 -
 3rdparty/benchmark/src/complexity.h           |   55 -
 3rdparty/benchmark/src/console_reporter.cc    |  190 -
 3rdparty/benchmark/src/counter.cc             |   80 -
 3rdparty/benchmark/src/counter.h              |   32 -
 3rdparty/benchmark/src/csv_reporter.cc        |  158 -
 3rdparty/benchmark/src/cycleclock.h           |  225 -
 3rdparty/benchmark/src/internal_macros.h      |  102 -
 3rdparty/benchmark/src/json_reporter.cc       |  323 -
 3rdparty/benchmark/src/log.h                  |   74 -
 3rdparty/benchmark/src/mutex.h                |  155 -
 3rdparty/benchmark/src/perf_counters.cc       |  132 -
 3rdparty/benchmark/src/perf_counters.h        |  172 -
 3rdparty/benchmark/src/re.h                   |  158 -
 3rdparty/benchmark/src/reporter.cc            |  114 -
 3rdparty/benchmark/src/sleep.cc               |   66 -
 3rdparty/benchmark/src/sleep.h                |   15 -
 3rdparty/benchmark/src/statistics.cc          |  208 -
 3rdparty/benchmark/src/statistics.h           |   38 -
 3rdparty/benchmark/src/string_util.cc         |  265 -
 3rdparty/benchmark/src/string_util.h          |   65 -
 3rdparty/benchmark/src/sysinfo.cc             |  725 --
 3rdparty/benchmark/src/thread_manager.h       |   63 -
 3rdparty/benchmark/src/thread_timer.h         |   86 -
 3rdparty/benchmark/src/timers.cc              |  259 -
 3rdparty/benchmark/src/timers.h               |   48 -
 3rdparty/benchmark/test/AssemblyTests.cmake   |   46 -
 3rdparty/benchmark/test/BUILD                 |   75 -
 3rdparty/benchmark/test/CMakeLists.txt        |  277 -
 3rdparty/benchmark/test/args_product_test.cc  |   77 -
 3rdparty/benchmark/test/basic_test.cc         |  179 -
 3rdparty/benchmark/test/benchmark_gtest.cc    |  165 -
 .../benchmark/test/benchmark_name_gtest.cc    |   74 -
 .../benchmark_random_interleaving_gtest.cc    |  127 -
 .../test/benchmark_setup_teardown_test.cc     |  157 -
 3rdparty/benchmark/test/benchmark_test.cc     |  247 -
 .../test/clobber_memory_assembly_test.cc      |   63 -
 .../benchmark/test/commandlineflags_gtest.cc  |  228 -
 3rdparty/benchmark/test/complexity_test.cc    |  226 -
 3rdparty/benchmark/test/cxx03_test.cc         |   62 -
 3rdparty/benchmark/test/diagnostics_test.cc   |   80 -
 .../test/display_aggregates_only_test.cc      |   45 -
 .../test/donotoptimize_assembly_test.cc       |  161 -
 3rdparty/benchmark/test/donotoptimize_test.cc |   53 -
 3rdparty/benchmark/test/filter_test.cc        |  118 -
 3rdparty/benchmark/test/fixture_test.cc       |   51 -
 .../benchmark/test/internal_threading_test.cc |  185 -
 3rdparty/benchmark/test/link_main_test.cc     |    8 -
 3rdparty/benchmark/test/map_test.cc           |   57 -
 .../benchmark/test/memory_manager_test.cc     |   46 -
 .../benchmark/test/multiple_ranges_test.cc    |   96 -
 3rdparty/benchmark/test/options_test.cc       |   75 -
 3rdparty/benchmark/test/output_test.h         |  211 -
 3rdparty/benchmark/test/output_test_helper.cc |  517 --
 .../benchmark/test/perf_counters_gtest.cc     |  145 -
 3rdparty/benchmark/test/perf_counters_test.cc |   27 -
 .../benchmark/test/register_benchmark_test.cc |  184 -
 3rdparty/benchmark/test/repetitions_test.cc   |  214 -
 .../test/report_aggregates_only_test.cc       |   41 -
 .../benchmark/test/reporter_output_test.cc    | 1127 ---
 .../benchmark/test/skip_with_error_test.cc    |  196 -
 3rdparty/benchmark/test/spec_arg_test.cc      |   95 -
 .../benchmark/test/state_assembly_test.cc     |   68 -
 3rdparty/benchmark/test/statistics_gtest.cc   |   35 -
 3rdparty/benchmark/test/string_util_gtest.cc  |  152 -
 .../benchmark/test/templated_fixture_test.cc  |   28 -
 .../test/user_counters_tabular_test.cc        |  557 --
 3rdparty/benchmark/test/user_counters_test.cc |  555 --
 .../test/user_counters_thousands_test.cc      |  186 -
 3rdparty/benchmark/tools/BUILD.bazel          |   19 -
 3rdparty/benchmark/tools/compare.py           |  429 -
 .../tools/gbench/Inputs/test1_run1.json       |  119 -
 .../tools/gbench/Inputs/test1_run2.json       |  119 -
 .../tools/gbench/Inputs/test2_run.json        |   81 -
 .../tools/gbench/Inputs/test3_run0.json       |   65 -
 .../tools/gbench/Inputs/test3_run1.json       |   65 -
 .../tools/gbench/Inputs/test4_run.json        |   96 -
 .../tools/gbench/Inputs/test4_run0.json       |   21 -
 .../tools/gbench/Inputs/test4_run1.json       |   21 -
 3rdparty/benchmark/tools/gbench/__init__.py   |    8 -
 3rdparty/benchmark/tools/gbench/report.py     | 1144 ---
 3rdparty/benchmark/tools/gbench/util.py       |  181 -
 3rdparty/benchmark/tools/requirements.txt     |    1 -
 3rdparty/benchmark/tools/strip_asm.py         |  151 -
 3rdparty/capo/make.hpp                        |   22 -
 3rdparty/capo/noncopyable.hpp                 |   25 -
 3rdparty/capo/random.hpp                      |   52 -
 3rdparty/capo/scope_guard.hpp                 |  103 -
 3rdparty/capo/spin_lock.hpp                   |  104 -
 3rdparty/capo/stopwatch.hpp                   |  109 -
 3rdparty/capo/type_name.hpp                   |  320 -
 3rdparty/capo/unused.hpp                      |   23 -
 3rdparty/gperftools/libtcmalloc_minimal.so.4  |    1 -
 .../gperftools/libtcmalloc_minimal.so.4.5.3   |    1 -
 3rdparty/gperftools/tcmalloc.h                |  163 -
 3rdparty/gtest/CMakeLists.txt                 |  332 -
 3rdparty/gtest/CONTRIBUTORS                   |   37 -
 3rdparty/gtest/LICENSE                        |   28 -
 3rdparty/gtest/README.md                      |  244 -
 3rdparty/gtest/cmake/Config.cmake.in          |    9 -
 3rdparty/gtest/cmake/gtest.pc.in              |   10 -
 3rdparty/gtest/cmake/gtest_main.pc.in         |   11 -
 3rdparty/gtest/cmake/internal_utils.cmake     |  358 -
 3rdparty/gtest/cmake/libgtest.la.in           |   21 -
 3rdparty/gtest/docs/advanced.md               | 2567 ------
 3rdparty/gtest/docs/faq.md                    |  753 --
 3rdparty/gtest/docs/pkgconfig.md              |  141 -
 3rdparty/gtest/docs/primer.md                 |  567 --
 3rdparty/gtest/docs/pump_manual.md            |  190 -
 3rdparty/gtest/docs/samples.md                |   22 -
 .../gtest/include/gtest/gtest-death-test.h    |  343 -
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 delete mode 100644 3rdparty/gtest/test/googletest-break-on-failure-unittest_.cc
 delete mode 100644 3rdparty/gtest/test/googletest-catch-exceptions-test.py
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 delete mode 100644 3rdparty/gtest/test/googletest-list-tests-unittest_.cc
 delete mode 100644 3rdparty/gtest/test/googletest-listener-test.cc
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 delete mode 100644 3rdparty/gtest/test/googletest-options-test.cc
 delete mode 100644 3rdparty/gtest/test/googletest-output-test-golden-lin.txt
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diff --git a/3rdparty/benchmark/.clang-format b/3rdparty/benchmark/.clang-format
deleted file mode 100644
index e7d00fea..00000000
--- a/3rdparty/benchmark/.clang-format
+++ /dev/null
@@ -1,5 +0,0 @@
----
-Language:        Cpp
-BasedOnStyle:  Google
-PointerAlignment: Left
-...
diff --git a/3rdparty/benchmark/.clang-tidy b/3rdparty/benchmark/.clang-tidy
deleted file mode 100644
index 56938a59..00000000
--- a/3rdparty/benchmark/.clang-tidy
+++ /dev/null
@@ -1,7 +0,0 @@
----
-Checks:          'clang-analyzer-*,readability-redundant-*,performance-*'
-WarningsAsErrors: 'clang-analyzer-*,readability-redundant-*,performance-*'
-HeaderFilterRegex: '.*'
-AnalyzeTemporaryDtors: false
-FormatStyle:     none
-User:            user
diff --git a/3rdparty/benchmark/.gitignore b/3rdparty/benchmark/.gitignore
deleted file mode 100644
index 704f56c2..00000000
--- a/3rdparty/benchmark/.gitignore
+++ /dev/null
@@ -1,67 +0,0 @@
-*.a
-*.so
-*.so.?*
-*.dll
-*.exe
-*.dylib
-*.cmake
-!/cmake/*.cmake
-!/test/AssemblyTests.cmake
-*~
-*.swp
-*.pyc
-__pycache__
-.DS_Store
-
-# lcov
-*.lcov
-/lcov
-
-# cmake files.
-/Testing
-CMakeCache.txt
-CMakeFiles/
-cmake_install.cmake
-
-# makefiles.
-Makefile
-
-# in-source build.
-bin/
-lib/
-/test/*_test
-
-# exuberant ctags.
-tags
-
-# YouCompleteMe configuration.
-.ycm_extra_conf.pyc
-
-# ninja generated files.
-.ninja_deps
-.ninja_log
-build.ninja
-install_manifest.txt
-rules.ninja
-
-# bazel output symlinks.
-bazel-*
-
-# out-of-source build top-level folders.
-build/
-_build/
-build*/
-
-# in-source dependencies
-/googletest/
-
-# Visual Studio 2015/2017 cache/options directory
-.vs/
-CMakeSettings.json
-
-# Visual Studio Code cache/options directory
-.vscode/
-
-# Python build stuff
-dist/
-*.egg-info*
diff --git a/3rdparty/benchmark/.travis.yml b/3rdparty/benchmark/.travis.yml
deleted file mode 100644
index 8cfed3d1..00000000
--- a/3rdparty/benchmark/.travis.yml
+++ /dev/null
@@ -1,208 +0,0 @@
-sudo: required
-dist: trusty
-language: cpp
-
-matrix:
-  include:
-    - compiler: gcc
-      addons:
-        apt:
-          packages:
-            - lcov
-      env: COMPILER=g++ C_COMPILER=gcc BUILD_TYPE=Coverage
-    - compiler: gcc
-      addons:
-        apt:
-          packages:
-            - g++-multilib
-            - libc6:i386
-      env:
-        - COMPILER=g++
-        - C_COMPILER=gcc
-        - BUILD_TYPE=Debug
-        - BUILD_32_BITS=ON
-        - EXTRA_FLAGS="-m32"
-    - compiler: gcc
-      addons:
-        apt:
-          packages:
-            - g++-multilib
-            - libc6:i386
-      env:
-        - COMPILER=g++
-        - C_COMPILER=gcc
-        - BUILD_TYPE=Release
-        - BUILD_32_BITS=ON
-        - EXTRA_FLAGS="-m32"
-    - compiler: gcc
-      env:
-        - INSTALL_GCC6_FROM_PPA=1
-        - COMPILER=g++-6 C_COMPILER=gcc-6  BUILD_TYPE=Debug
-        - ENABLE_SANITIZER=1
-        - EXTRA_FLAGS="-fno-omit-frame-pointer -g -O2 -fsanitize=undefined,address -fuse-ld=gold"
-    # Clang w/ libc++
-    - compiler: clang
-      dist: xenial
-      addons:
-        apt:
-          packages:
-            clang-3.8
-      env:
-        - INSTALL_GCC6_FROM_PPA=1
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
-        - LIBCXX_BUILD=1
-        - EXTRA_CXX_FLAGS="-stdlib=libc++"
-    - compiler: clang
-      dist: xenial
-      addons:
-        apt:
-          packages:
-            clang-3.8
-      env:
-        - INSTALL_GCC6_FROM_PPA=1
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Release
-        - LIBCXX_BUILD=1
-        - EXTRA_CXX_FLAGS="-stdlib=libc++"
-    # Clang w/ 32bit libc++
-    - compiler: clang
-      dist: xenial
-      addons:
-        apt:
-          packages:
-            - clang-3.8
-            - g++-multilib
-            - libc6:i386
-      env:
-        - INSTALL_GCC6_FROM_PPA=1
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
-        - LIBCXX_BUILD=1
-        - BUILD_32_BITS=ON
-        - EXTRA_FLAGS="-m32"
-        - EXTRA_CXX_FLAGS="-stdlib=libc++"
-    # Clang w/ 32bit libc++
-    - compiler: clang
-      dist: xenial
-      addons:
-        apt:
-          packages:
-            - clang-3.8
-            - g++-multilib
-            - libc6:i386
-      env:
-        - INSTALL_GCC6_FROM_PPA=1
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Release
-        - LIBCXX_BUILD=1
-        - BUILD_32_BITS=ON
-        - EXTRA_FLAGS="-m32"
-        - EXTRA_CXX_FLAGS="-stdlib=libc++"
-    # Clang w/ libc++, ASAN, UBSAN
-    - compiler: clang
-      dist: xenial
-      addons:
-        apt:
-          packages:
-            clang-3.8
-      env:
-        - INSTALL_GCC6_FROM_PPA=1
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
-        - LIBCXX_BUILD=1 LIBCXX_SANITIZER="Undefined;Address"
-        - ENABLE_SANITIZER=1
-        - EXTRA_FLAGS="-g -O2 -fno-omit-frame-pointer -fsanitize=undefined,address -fno-sanitize-recover=all"
-        - EXTRA_CXX_FLAGS="-stdlib=libc++"
-        - UBSAN_OPTIONS=print_stacktrace=1
-    # Clang w/ libc++ and MSAN
-    - compiler: clang
-      dist: xenial
-      addons:
-        apt:
-          packages:
-            clang-3.8
-      env:
-        - INSTALL_GCC6_FROM_PPA=1
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
-        - LIBCXX_BUILD=1 LIBCXX_SANITIZER=MemoryWithOrigins
-        - ENABLE_SANITIZER=1
-        - EXTRA_FLAGS="-g -O2 -fno-omit-frame-pointer -fsanitize=memory -fsanitize-memory-track-origins"
-        - EXTRA_CXX_FLAGS="-stdlib=libc++"
-    # Clang w/ libc++ and MSAN
-    - compiler: clang
-      dist: xenial
-      addons:
-        apt:
-          packages:
-            clang-3.8
-      env:
-        - INSTALL_GCC6_FROM_PPA=1
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=RelWithDebInfo
-        - LIBCXX_BUILD=1 LIBCXX_SANITIZER=Thread
-        - ENABLE_SANITIZER=1
-        - EXTRA_FLAGS="-g -O2 -fno-omit-frame-pointer -fsanitize=thread -fno-sanitize-recover=all"
-        - EXTRA_CXX_FLAGS="-stdlib=libc++"
-    - os: osx
-      osx_image: xcode8.3
-      compiler: clang
-      env:
-        - COMPILER=clang++
-        - BUILD_TYPE=Release
-        - BUILD_32_BITS=ON
-        - EXTRA_FLAGS="-m32"
-
-before_script:
-  - if [ -n "${LIBCXX_BUILD}" ]; then
-      source .libcxx-setup.sh;
-    fi
-  - if [ -n "${ENABLE_SANITIZER}" ]; then
-      export EXTRA_OPTIONS="-DBENCHMARK_ENABLE_ASSEMBLY_TESTS=OFF";
-    else
-      export EXTRA_OPTIONS="";
-    fi
-  - mkdir -p build && cd build
-
-before_install:
-  - if [ -z "$BUILD_32_BITS" ]; then
-      export BUILD_32_BITS=OFF && echo disabling 32 bit build;
-    fi
-  - if [ -n "${INSTALL_GCC6_FROM_PPA}" ]; then
-      sudo add-apt-repository -y "ppa:ubuntu-toolchain-r/test";
-      sudo apt-get update --option Acquire::Retries=100 --option Acquire::http::Timeout="60";
-    fi
-
-install:
-  - if [ -n "${INSTALL_GCC6_FROM_PPA}" ]; then
-      travis_wait sudo -E apt-get -yq --no-install-suggests --no-install-recommends install g++-6;
-    fi
-  - if [ "${TRAVIS_OS_NAME}" == "linux" -a "${BUILD_32_BITS}" == "OFF" ]; then
-      travis_wait sudo -E apt-get -y --no-install-suggests --no-install-recommends install llvm-3.9-tools;
-      sudo cp /usr/lib/llvm-3.9/bin/FileCheck /usr/local/bin/;
-    fi
-  - if [ "${BUILD_TYPE}" == "Coverage" -a "${TRAVIS_OS_NAME}" == "linux" ]; then
-      PATH=~/.local/bin:${PATH};
-      pip install --user --upgrade pip;
-      travis_wait pip install --user cpp-coveralls;
-    fi
-  - if [ "${C_COMPILER}" == "gcc-7" -a "${TRAVIS_OS_NAME}" == "osx" ]; then
-      rm -f /usr/local/include/c++;
-      brew update;
-      travis_wait brew install gcc@7;
-    fi
-  - if [ "${TRAVIS_OS_NAME}" == "linux" ]; then
-      sudo apt-get update -qq;
-      sudo apt-get install -qq unzip cmake3;
-      wget https://github.com/bazelbuild/bazel/releases/download/3.2.0/bazel-3.2.0-installer-linux-x86_64.sh --output-document bazel-installer.sh;
-      travis_wait sudo bash bazel-installer.sh;
-    fi
-  - if [ "${TRAVIS_OS_NAME}" == "osx" ]; then
-      curl -L -o bazel-installer.sh https://github.com/bazelbuild/bazel/releases/download/3.2.0/bazel-3.2.0-installer-darwin-x86_64.sh;
-      travis_wait sudo bash bazel-installer.sh;
-    fi
-
-script:
-  - cmake -DCMAKE_C_COMPILER=${C_COMPILER} -DCMAKE_CXX_COMPILER=${COMPILER} -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DCMAKE_C_FLAGS="${EXTRA_FLAGS}" -DCMAKE_CXX_FLAGS="${EXTRA_FLAGS} ${EXTRA_CXX_FLAGS}" -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON -DBENCHMARK_BUILD_32_BITS=${BUILD_32_BITS} ${EXTRA_OPTIONS} ..
-  - make
-  - ctest -C ${BUILD_TYPE} --output-on-failure
-  - bazel test -c dbg --define google_benchmark.have_regex=posix --announce_rc --verbose_failures --test_output=errors --keep_going //test/...
-
-after_success:
-  - if [ "${BUILD_TYPE}" == "Coverage" -a "${TRAVIS_OS_NAME}" == "linux" ]; then
-      coveralls --include src --include include --gcov-options '\-lp' --root .. --build-root .;
-    fi
diff --git a/3rdparty/benchmark/.ycm_extra_conf.py b/3rdparty/benchmark/.ycm_extra_conf.py
deleted file mode 100644
index 5649ddcc..00000000
--- a/3rdparty/benchmark/.ycm_extra_conf.py
+++ /dev/null
@@ -1,115 +0,0 @@
-import os
-import ycm_core
-
-# These are the compilation flags that will be used in case there's no
-# compilation database set (by default, one is not set).
-# CHANGE THIS LIST OF FLAGS. YES, THIS IS THE DROID YOU HAVE BEEN LOOKING FOR.
-flags = [
-'-Wall',
-'-Werror',
-'-pedantic-errors',
-'-std=c++0x',
-'-fno-strict-aliasing',
-'-O3',
-'-DNDEBUG',
-# ...and the same thing goes for the magic -x option which specifies the
-# language that the files to be compiled are written in. This is mostly
-# relevant for c++ headers.
-# For a C project, you would set this to 'c' instead of 'c++'.
-'-x', 'c++',
-'-I', 'include',
-'-isystem', '/usr/include',
-'-isystem', '/usr/local/include',
-]
-
-
-# Set this to the absolute path to the folder (NOT the file!) containing the
-# compile_commands.json file to use that instead of 'flags'. See here for
-# more details: http://clang.llvm.org/docs/JSONCompilationDatabase.html
-#
-# Most projects will NOT need to set this to anything; you can just change the
-# 'flags' list of compilation flags. Notice that YCM itself uses that approach.
-compilation_database_folder = ''
-
-if os.path.exists( compilation_database_folder ):
-  database = ycm_core.CompilationDatabase( compilation_database_folder )
-else:
-  database = None
-
-SOURCE_EXTENSIONS = [ '.cc' ]
-
-def DirectoryOfThisScript():
-  return os.path.dirname( os.path.abspath( __file__ ) )
-
-
-def MakeRelativePathsInFlagsAbsolute( flags, working_directory ):
-  if not working_directory:
-    return list( flags )
-  new_flags = []
-  make_next_absolute = False
-  path_flags = [ '-isystem', '-I', '-iquote', '--sysroot=' ]
-  for flag in flags:
-    new_flag = flag
-
-    if make_next_absolute:
-      make_next_absolute = False
-      if not flag.startswith( '/' ):
-        new_flag = os.path.join( working_directory, flag )
-
-    for path_flag in path_flags:
-      if flag == path_flag:
-        make_next_absolute = True
-        break
-
-      if flag.startswith( path_flag ):
-        path = flag[ len( path_flag ): ]
-        new_flag = path_flag + os.path.join( working_directory, path )
-        break
-
-    if new_flag:
-      new_flags.append( new_flag )
-  return new_flags
-
-
-def IsHeaderFile( filename ):
-  extension = os.path.splitext( filename )[ 1 ]
-  return extension in [ '.h', '.hxx', '.hpp', '.hh' ]
-
-
-def GetCompilationInfoForFile( filename ):
-  # The compilation_commands.json file generated by CMake does not have entries
-  # for header files. So we do our best by asking the db for flags for a
-  # corresponding source file, if any. If one exists, the flags for that file
-  # should be good enough.
-  if IsHeaderFile( filename ):
-    basename = os.path.splitext( filename )[ 0 ]
-    for extension in SOURCE_EXTENSIONS:
-      replacement_file = basename + extension
-      if os.path.exists( replacement_file ):
-        compilation_info = database.GetCompilationInfoForFile(
-          replacement_file )
-        if compilation_info.compiler_flags_:
-          return compilation_info
-    return None
-  return database.GetCompilationInfoForFile( filename )
-
-
-def FlagsForFile( filename, **kwargs ):
-  if database:
-    # Bear in mind that compilation_info.compiler_flags_ does NOT return a
-    # python list, but a "list-like" StringVec object
-    compilation_info = GetCompilationInfoForFile( filename )
-    if not compilation_info:
-      return None
-
-    final_flags = MakeRelativePathsInFlagsAbsolute(
-      compilation_info.compiler_flags_,
-      compilation_info.compiler_working_dir_ )
-  else:
-    relative_to = DirectoryOfThisScript()
-    final_flags = MakeRelativePathsInFlagsAbsolute( flags, relative_to )
-
-  return {
-    'flags': final_flags,
-    'do_cache': True
-  }
diff --git a/3rdparty/benchmark/AUTHORS b/3rdparty/benchmark/AUTHORS
deleted file mode 100644
index 2b8072e0..00000000
--- a/3rdparty/benchmark/AUTHORS
+++ /dev/null
@@ -1,63 +0,0 @@
-# This is the official list of benchmark authors for copyright purposes.
-# This file is distinct from the CONTRIBUTORS files.
-# See the latter for an explanation.
-#
-# Names should be added to this file as:
-#	Name or Organization <email address>
-# The email address is not required for organizations.
-#
-# Please keep the list sorted.
-
-Albert Pretorius <pretoalb@gmail.com>
-Alex Steele <steeleal123@gmail.com>
-Andriy Berestovskyy <berestovskyy@gmail.com>
-Arne Beer <arne@twobeer.de>
-Carto
-Christian Wassermann <christian_wassermann@web.de>
-Christopher Seymour <chris.j.seymour@hotmail.com>
-Colin Braley <braley.colin@gmail.com>
-Daniel Harvey <danielharvey458@gmail.com>
-David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
-Deniz Evrenci <denizevrenci@gmail.com>
-Dirac Research 
-Dominik Czarnota <dominik.b.czarnota@gmail.com>
-Dominik Korman <kormandominik@gmail.com>
-Donald Aingworth <donalds_junk_mail@yahoo.com>
-Eric Backus <eric_backus@alum.mit.edu>
-Eric Fiselier <eric@efcs.ca>
-Eugene Zhuk <eugene.zhuk@gmail.com>
-Evgeny Safronov <division494@gmail.com>
-Federico Ficarelli <federico.ficarelli@gmail.com>
-Felix Homann <linuxaudio@showlabor.de>
-Gergő Szitár <szitar.gergo@gmail.com>
-Google Inc.
-International Business Machines Corporation
-Ismael Jimenez Martinez <ismael.jimenez.martinez@gmail.com>
-Jern-Kuan Leong <jernkuan@gmail.com>
-JianXiong Zhou <zhoujianxiong2@gmail.com>
-Joao Paulo Magalhaes <joaoppmagalhaes@gmail.com>
-Jordan Williams <jwillikers@protonmail.com>
-Jussi Knuuttila <jussi.knuuttila@gmail.com>
-Kaito Udagawa <umireon@gmail.com>
-Kishan Kumar <kumar.kishan@outlook.com>
-Lei Xu <eddyxu@gmail.com>
-Matt Clarkson <mattyclarkson@gmail.com>
-Maxim Vafin <maxvafin@gmail.com>
-MongoDB Inc.
-Nick Hutchinson <nshutchinson@gmail.com>
-Norman Heino <norman.heino@gmail.com>
-Oleksandr Sochka <sasha.sochka@gmail.com>
-Ori Livneh <ori.livneh@gmail.com>
-Paul Redmond <paul.redmond@gmail.com>
-Radoslav Yovchev <radoslav.tm@gmail.com>
-Roman Lebedev <lebedev.ri@gmail.com>
-Sayan Bhattacharjee <aero.sayan@gmail.com>
-Shuo Chen <chenshuo@chenshuo.com>
-Staffan Tjernstrom <staffantj@gmail.com>
-Steinar H. Gunderson <sgunderson@bigfoot.com>
-Stripe, Inc.
-Tobias Schmidt <tobias.schmidt@in.tum.de>
-Yixuan Qiu <yixuanq@gmail.com>
-Yusuke Suzuki <utatane.tea@gmail.com>
-Zbigniew Skowron <zbychs@gmail.com>
-Min-Yih Hsu <yihshyng223@gmail.com>
diff --git a/3rdparty/benchmark/BUILD.bazel b/3rdparty/benchmark/BUILD.bazel
deleted file mode 100644
index 904c691d..00000000
--- a/3rdparty/benchmark/BUILD.bazel
+++ /dev/null
@@ -1,52 +0,0 @@
-licenses(["notice"])
-
-config_setting(
-    name = "qnx",
-    constraint_values = ["@platforms//os:qnx"],
-    values = {
-        "cpu": "x64_qnx",
-    },
-    visibility = [":__subpackages__"],
-)
-
-config_setting(
-    name = "windows",
-    constraint_values = ["@platforms//os:windows"],
-    values = {
-        "cpu": "x64_windows",
-    },
-    visibility = [":__subpackages__"],
-)
-
-cc_library(
-    name = "benchmark",
-    srcs = glob(
-        [
-            "src/*.cc",
-            "src/*.h",
-        ],
-        exclude = ["src/benchmark_main.cc"],
-    ),
-    hdrs = ["include/benchmark/benchmark.h"],
-    linkopts = select({
-        ":windows": ["-DEFAULTLIB:shlwapi.lib"],
-        "//conditions:default": ["-pthread"],
-    }),
-    strip_include_prefix = "include",
-    visibility = ["//visibility:public"],
-)
-
-cc_library(
-    name = "benchmark_main",
-    srcs = ["src/benchmark_main.cc"],
-    hdrs = ["include/benchmark/benchmark.h"],
-    strip_include_prefix = "include",
-    visibility = ["//visibility:public"],
-    deps = [":benchmark"],
-)
-
-cc_library(
-    name = "benchmark_internal_headers",
-    hdrs = glob(["src/*.h"]),
-    visibility = ["//test:__pkg__"],
-)
diff --git a/3rdparty/benchmark/CMakeLists.txt b/3rdparty/benchmark/CMakeLists.txt
deleted file mode 100644
index b8852e4c..00000000
--- a/3rdparty/benchmark/CMakeLists.txt
+++ /dev/null
@@ -1,342 +0,0 @@
-cmake_minimum_required (VERSION 3.5.1)
-
-foreach(p
-    CMP0048 # OK to clear PROJECT_VERSION on project()
-    CMP0054 # CMake 3.1
-    CMP0056 # export EXE_LINKER_FLAGS to try_run
-    CMP0057 # Support no if() IN_LIST operator
-    CMP0063 # Honor visibility properties for all targets
-    CMP0077 # Allow option() overrides in importing projects
-    )
-  if(POLICY ${p})
-    cmake_policy(SET ${p} NEW)
-  endif()
-endforeach()
-
-project (benchmark VERSION 1.6.1 LANGUAGES CXX)
-
-option(BENCHMARK_ENABLE_TESTING "Enable testing of the benchmark library." ON)
-option(BENCHMARK_ENABLE_EXCEPTIONS "Enable the use of exceptions in the benchmark library." ON)
-option(BENCHMARK_ENABLE_LTO "Enable link time optimisation of the benchmark library." OFF)
-option(BENCHMARK_USE_LIBCXX "Build and test using libc++ as the standard library." OFF)
-option(BENCHMARK_ENABLE_WERROR "Build Release candidates with -Werror." ON)
-option(BENCHMARK_FORCE_WERROR "Build Release candidates with -Werror regardless of compiler issues." OFF)
-
-if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "PGI")
-  # PGC++ maybe reporting false positives.
-  set(BENCHMARK_ENABLE_WERROR OFF)
-endif()
-if(BENCHMARK_FORCE_WERROR)
-  set(BENCHMARK_ENABLE_WERROR ON)
-endif(BENCHMARK_FORCE_WERROR)
-
-if(NOT MSVC)
-  option(BENCHMARK_BUILD_32_BITS "Build a 32 bit version of the library." OFF)
-else()
-  set(BENCHMARK_BUILD_32_BITS OFF CACHE BOOL "Build a 32 bit version of the library - unsupported when using MSVC)" FORCE)
-endif()
-option(BENCHMARK_ENABLE_INSTALL "Enable installation of benchmark. (Projects embedding benchmark may want to turn this OFF.)" ON)
-option(BENCHMARK_ENABLE_DOXYGEN "Build documentation with Doxygen." OFF)
-option(BENCHMARK_INSTALL_DOCS "Enable installation of documentation." ON)
-
-# Allow unmet dependencies to be met using CMake's ExternalProject mechanics, which
-# may require downloading the source code.
-option(BENCHMARK_DOWNLOAD_DEPENDENCIES "Allow the downloading and in-tree building of unmet dependencies" OFF)
-
-# This option can be used to disable building and running unit tests which depend on gtest
-# in cases where it is not possible to build or find a valid version of gtest.
-option(BENCHMARK_ENABLE_GTEST_TESTS "Enable building the unit tests which depend on gtest" ON)
-option(BENCHMARK_USE_BUNDLED_GTEST "Use bundled GoogleTest. If disabled, the find_package(GTest) will be used." ON)
-
-option(BENCHMARK_ENABLE_LIBPFM "Enable performance counters provided by libpfm" OFF)
-
-set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
-if(MSVC)
-    # As of CMake 3.18, CMAKE_SYSTEM_PROCESSOR is not set properly for MSVC and
-    # cross-compilation (e.g. Host=x86_64, target=aarch64) requires using the
-    # undocumented, but working variable.
-    # See https://gitlab.kitware.com/cmake/cmake/-/issues/15170
-    set(CMAKE_SYSTEM_PROCESSOR ${MSVC_CXX_ARCHITECTURE_ID})
-    if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "ARM")
-      set(CMAKE_CROSSCOMPILING TRUE)
-    endif()
-endif()
-
-set(ENABLE_ASSEMBLY_TESTS_DEFAULT OFF)
-function(should_enable_assembly_tests)
-  if(CMAKE_BUILD_TYPE)
-    string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
-    if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage")
-      # FIXME: The --coverage flag needs to be removed when building assembly
-      # tests for this to work.
-      return()
-    endif()
-  endif()
-  if (MSVC)
-    return()
-  elseif(NOT CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64")
-    return()
-  elseif(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
-    # FIXME: Make these work on 32 bit builds
-    return()
-  elseif(BENCHMARK_BUILD_32_BITS)
-     # FIXME: Make these work on 32 bit builds
-    return()
-  endif()
-  find_program(LLVM_FILECHECK_EXE FileCheck)
-  if (LLVM_FILECHECK_EXE)
-    set(LLVM_FILECHECK_EXE "${LLVM_FILECHECK_EXE}" CACHE PATH "llvm filecheck" FORCE)
-    message(STATUS "LLVM FileCheck Found: ${LLVM_FILECHECK_EXE}")
-  else()
-    message(STATUS "Failed to find LLVM FileCheck")
-    return()
-  endif()
-  set(ENABLE_ASSEMBLY_TESTS_DEFAULT ON PARENT_SCOPE)
-endfunction()
-should_enable_assembly_tests()
-
-# This option disables the building and running of the assembly verification tests
-option(BENCHMARK_ENABLE_ASSEMBLY_TESTS "Enable building and running the assembly tests"
-    ${ENABLE_ASSEMBLY_TESTS_DEFAULT})
-
-# Make sure we can import out CMake functions
-list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
-list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
-
-
-# Read the git tags to determine the project version
-include(GetGitVersion)
-get_git_version(GIT_VERSION)
-
-# If no git version can be determined, use the version
-# from the project() command
-if ("${GIT_VERSION}" STREQUAL "0.0.0")
-  set(VERSION "${benchmark_VERSION}")
-else()
-  set(VERSION "${GIT_VERSION}")
-endif()
-# Tell the user what versions we are using
-message(STATUS "Version: ${VERSION}")
-
-# The version of the libraries
-set(GENERIC_LIB_VERSION ${VERSION})
-string(SUBSTRING ${VERSION} 0 1 GENERIC_LIB_SOVERSION)
-
-# Import our CMake modules
-include(CheckCXXCompilerFlag)
-include(AddCXXCompilerFlag)
-include(CXXFeatureCheck)
-include(CheckLibraryExists)
-
-check_library_exists(rt shm_open "" HAVE_LIB_RT)
-
-if (BENCHMARK_BUILD_32_BITS)
-  add_required_cxx_compiler_flag(-m32)
-endif()
-
-if (MSVC)
-  # Turn compiler warnings up to 11
-  string(REGEX REPLACE "[-/]W[1-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
-  add_definitions(-D_CRT_SECURE_NO_WARNINGS)
-
-  if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
-    add_cxx_compiler_flag(-EHs-)
-    add_cxx_compiler_flag(-EHa-)
-    add_definitions(-D_HAS_EXCEPTIONS=0)
-  endif()
-  # Link time optimisation
-  if (BENCHMARK_ENABLE_LTO)
-    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /GL")
-    set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "${CMAKE_STATIC_LINKER_FLAGS_RELEASE} /LTCG")
-    set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG")
-    set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG")
-
-    set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /GL")
-    string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO}")
-    set(CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
-    string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO}")
-    set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
-    string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}")
-    set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
-
-    set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} /GL")
-    set(CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL "${CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL} /LTCG")
-    set(CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL "${CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL} /LTCG")
-    set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL} /LTCG")
-  endif()
-else()
-  # Try and enable C++11. Don't use C++14 because it doesn't work in some
-  # configurations.
-  add_cxx_compiler_flag(-std=c++11)
-  if (NOT HAVE_CXX_FLAG_STD_CXX11)
-    add_cxx_compiler_flag(-std=c++0x)
-  endif()
-
-  # Turn compiler warnings up to 11
-  add_cxx_compiler_flag(-Wall)
-  add_cxx_compiler_flag(-Wextra)
-  add_cxx_compiler_flag(-Wshadow)
-  if(BENCHMARK_ENABLE_WERROR)
-      add_cxx_compiler_flag(-Werror RELEASE)
-      add_cxx_compiler_flag(-Werror RELWITHDEBINFO)
-      add_cxx_compiler_flag(-Werror MINSIZEREL)
-  endif()
-  if (NOT BENCHMARK_ENABLE_TESTING)
-    # Disable warning when compiling tests as gtest does not use 'override'.
-    add_cxx_compiler_flag(-Wsuggest-override)
-  endif()
-  add_cxx_compiler_flag(-pedantic)
-  add_cxx_compiler_flag(-pedantic-errors)
-  add_cxx_compiler_flag(-Wshorten-64-to-32)
-  add_cxx_compiler_flag(-fstrict-aliasing)
-  # Disable warnings regarding deprecated parts of the library while building
-  # and testing those parts of the library.
-  add_cxx_compiler_flag(-Wno-deprecated-declarations)
-  if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
-    # Intel silently ignores '-Wno-deprecated-declarations',
-    # warning no. 1786 must be explicitly disabled.
-    # See #631 for rationale.
-    add_cxx_compiler_flag(-wd1786)
-  endif()
-  # Disable deprecation warnings for release builds (when -Werror is enabled).
-  if(BENCHMARK_ENABLE_WERROR)
-      add_cxx_compiler_flag(-Wno-deprecated RELEASE)
-      add_cxx_compiler_flag(-Wno-deprecated RELWITHDEBINFO)
-      add_cxx_compiler_flag(-Wno-deprecated MINSIZEREL)
-  endif()
-  if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
-    add_cxx_compiler_flag(-fno-exceptions)
-  endif()
-
-  if (HAVE_CXX_FLAG_FSTRICT_ALIASING)
-    if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel") #ICC17u2: Many false positives for Wstrict-aliasing
-      add_cxx_compiler_flag(-Wstrict-aliasing)
-    endif()
-  endif()
-  # ICC17u2: overloaded virtual function "benchmark::Fixture::SetUp" is only partially overridden
-  # (because of deprecated overload)
-  add_cxx_compiler_flag(-wd654)
-  add_cxx_compiler_flag(-Wthread-safety)
-  if (HAVE_CXX_FLAG_WTHREAD_SAFETY)
-    cxx_feature_check(THREAD_SAFETY_ATTRIBUTES)
-  endif()
-
-  # On most UNIX like platforms g++ and clang++ define _GNU_SOURCE as a
-  # predefined macro, which turns on all of the wonderful libc extensions.
-  # However g++ doesn't do this in Cygwin so we have to define it ourselfs
-  # since we depend on GNU/POSIX/BSD extensions.
-  if (CYGWIN)
-    add_definitions(-D_GNU_SOURCE=1)
-  endif()
-
-  if (QNXNTO)
-    add_definitions(-D_QNX_SOURCE)
-  endif()
-
-  # Link time optimisation
-  if (BENCHMARK_ENABLE_LTO)
-    add_cxx_compiler_flag(-flto)
-    add_cxx_compiler_flag(-Wno-lto-type-mismatch)
-    if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-      find_program(GCC_AR gcc-ar)
-      if (GCC_AR)
-        set(CMAKE_AR ${GCC_AR})
-      endif()
-      find_program(GCC_RANLIB gcc-ranlib)
-      if (GCC_RANLIB)
-        set(CMAKE_RANLIB ${GCC_RANLIB})
-      endif()
-    elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-      include(llvm-toolchain)
-    endif()
-  endif()
-
-  # Coverage build type
-  set(BENCHMARK_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_DEBUG}"
-    CACHE STRING "Flags used by the C++ compiler during coverage builds."
-    FORCE)
-  set(BENCHMARK_EXE_LINKER_FLAGS_COVERAGE "${CMAKE_EXE_LINKER_FLAGS_DEBUG}"
-    CACHE STRING "Flags used for linking binaries during coverage builds."
-    FORCE)
-  set(BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}"
-    CACHE STRING "Flags used by the shared libraries linker during coverage builds."
-    FORCE)
-  mark_as_advanced(
-    BENCHMARK_CXX_FLAGS_COVERAGE
-    BENCHMARK_EXE_LINKER_FLAGS_COVERAGE
-    BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE)
-  set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING
-    "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel Coverage.")
-  add_cxx_compiler_flag(--coverage COVERAGE)
-endif()
-
-if (BENCHMARK_USE_LIBCXX)
-  if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-    add_cxx_compiler_flag(-stdlib=libc++)
-  elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR
-          "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
-    add_cxx_compiler_flag(-nostdinc++)
-    message(WARNING "libc++ header path must be manually specified using CMAKE_CXX_FLAGS")
-    # Adding -nodefaultlibs directly to CMAKE_<TYPE>_LINKER_FLAGS will break
-    # configuration checks such as 'find_package(Threads)'
-    list(APPEND BENCHMARK_CXX_LINKER_FLAGS -nodefaultlibs)
-    # -lc++ cannot be added directly to CMAKE_<TYPE>_LINKER_FLAGS because
-    # linker flags appear before all linker inputs and -lc++ must appear after.
-    list(APPEND BENCHMARK_CXX_LIBRARIES c++)
-  else()
-    message(FATAL_ERROR "-DBENCHMARK_USE_LIBCXX:BOOL=ON is not supported for compiler")
-  endif()
-endif(BENCHMARK_USE_LIBCXX)
-
-set(EXTRA_CXX_FLAGS "")
-if (WIN32 AND "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-  # Clang on Windows fails to compile the regex feature check under C++11
-  set(EXTRA_CXX_FLAGS "-DCMAKE_CXX_STANDARD=14")
-endif()
-
-# C++ feature checks
-# Determine the correct regular expression engine to use
-cxx_feature_check(STD_REGEX ${EXTRA_CXX_FLAGS})
-cxx_feature_check(GNU_POSIX_REGEX ${EXTRA_CXX_FLAGS})
-cxx_feature_check(POSIX_REGEX ${EXTRA_CXX_FLAGS})
-if(NOT HAVE_STD_REGEX AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
-  message(FATAL_ERROR "Failed to determine the source files for the regular expression backend")
-endif()
-if (NOT BENCHMARK_ENABLE_EXCEPTIONS AND HAVE_STD_REGEX
-        AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
-  message(WARNING "Using std::regex with exceptions disabled is not fully supported")
-endif()
-
-cxx_feature_check(STEADY_CLOCK)
-# Ensure we have pthreads
-set(THREADS_PREFER_PTHREAD_FLAG ON)
-find_package(Threads REQUIRED)
-
-if (BENCHMARK_ENABLE_LIBPFM)
-  find_package(PFM)
-endif()
-
-# Set up directories
-include_directories(${PROJECT_SOURCE_DIR}/include)
-
-# Build the targets
-add_subdirectory(src)
-
-if (BENCHMARK_ENABLE_TESTING)
-  enable_testing()
-  if (BENCHMARK_ENABLE_GTEST_TESTS AND
-      NOT (TARGET gtest AND TARGET gtest_main AND
-           TARGET gmock AND TARGET gmock_main))
-    if (BENCHMARK_USE_BUNDLED_GTEST)
-      include(GoogleTest)
-    else()
-      find_package(GTest CONFIG REQUIRED)
-      add_library(gtest ALIAS GTest::gtest)
-      add_library(gtest_main ALIAS GTest::gtest_main)
-      add_library(gmock ALIAS GTest::gmock)
-      add_library(gmock_main ALIAS GTest::gmock_main)
-    endif()
-  endif()
-  add_subdirectory(test)
-endif()
diff --git a/3rdparty/benchmark/CONTRIBUTING.md b/3rdparty/benchmark/CONTRIBUTING.md
deleted file mode 100644
index 43de4c9d..00000000
--- a/3rdparty/benchmark/CONTRIBUTING.md
+++ /dev/null
@@ -1,58 +0,0 @@
-# How to contribute #
-
-We'd love to accept your patches and contributions to this project.  There are
-a just a few small guidelines you need to follow.
-
-
-## Contributor License Agreement ##
-
-Contributions to any Google project must be accompanied by a Contributor
-License Agreement.  This is not a copyright **assignment**, it simply gives
-Google permission to use and redistribute your contributions as part of the
-project.
-
-  * If you are an individual writing original source code and you're sure you
-    own the intellectual property, then you'll need to sign an [individual
-    CLA][].
-
-  * If you work for a company that wants to allow you to contribute your work,
-    then you'll need to sign a [corporate CLA][].
-
-You generally only need to submit a CLA once, so if you've already submitted
-one (even if it was for a different project), you probably don't need to do it
-again.
-
-[individual CLA]: https://developers.google.com/open-source/cla/individual
-[corporate CLA]: https://developers.google.com/open-source/cla/corporate
-
-Once your CLA is submitted (or if you already submitted one for
-another Google project), make a commit adding yourself to the
-[AUTHORS][] and [CONTRIBUTORS][] files. This commit can be part
-of your first [pull request][].
-
-[AUTHORS]: AUTHORS
-[CONTRIBUTORS]: CONTRIBUTORS
-
-
-## Submitting a patch ##
-
-  1. It's generally best to start by opening a new issue describing the bug or
-     feature you're intending to fix.  Even if you think it's relatively minor,
-     it's helpful to know what people are working on.  Mention in the initial
-     issue that you are planning to work on that bug or feature so that it can
-     be assigned to you.
-
-  1. Follow the normal process of [forking][] the project, and setup a new
-     branch to work in.  It's important that each group of changes be done in
-     separate branches in order to ensure that a pull request only includes the
-     commits related to that bug or feature.
-
-  1. Do your best to have [well-formed commit messages][] for each change.
-     This provides consistency throughout the project, and ensures that commit
-     messages are able to be formatted properly by various git tools.
-
-  1. Finally, push the commits to your fork and submit a [pull request][].
-
-[forking]: https://help.github.com/articles/fork-a-repo
-[well-formed commit messages]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html
-[pull request]: https://help.github.com/articles/creating-a-pull-request
diff --git a/3rdparty/benchmark/CONTRIBUTORS b/3rdparty/benchmark/CONTRIBUTORS
deleted file mode 100644
index 651fbeaf..00000000
--- a/3rdparty/benchmark/CONTRIBUTORS
+++ /dev/null
@@ -1,87 +0,0 @@
-# People who have agreed to one of the CLAs and can contribute patches.
-# The AUTHORS file lists the copyright holders; this file
-# lists people.  For example, Google employees are listed here
-# but not in AUTHORS, because Google holds the copyright.
-#
-# Names should be added to this file only after verifying that
-# the individual or the individual's organization has agreed to
-# the appropriate Contributor License Agreement, found here:
-#
-# https://developers.google.com/open-source/cla/individual
-# https://developers.google.com/open-source/cla/corporate
-#
-# The agreement for individuals can be filled out on the web.
-#
-# When adding J Random Contributor's name to this file,
-# either J's name or J's organization's name should be
-# added to the AUTHORS file, depending on whether the
-# individual or corporate CLA was used.
-#
-# Names should be added to this file as:
-#     Name <email address>
-#
-# Please keep the list sorted.
-
-Abhina Sreeskantharajan <abhina.sreeskantharajan@ibm.com>
-Albert Pretorius <pretoalb@gmail.com>
-Alex Steele <steelal123@gmail.com>
-Andriy Berestovskyy <berestovskyy@gmail.com>
-Arne Beer <arne@twobeer.de>
-Billy Robert O'Neal III <billy.oneal@gmail.com> <bion@microsoft.com>
-Chris Kennelly <ckennelly@google.com> <ckennelly@ckennelly.com>
-Christian Wassermann <christian_wassermann@web.de>
-Christopher Seymour <chris.j.seymour@hotmail.com>
-Colin Braley <braley.colin@gmail.com>
-Cyrille Faucheux <cyrille.faucheux@gmail.com>
-Daniel Harvey <danielharvey458@gmail.com>
-David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
-Deniz Evrenci <denizevrenci@gmail.com>
-Dominic Hamon <dma@stripysock.com> <dominic@google.com>
-Dominik Czarnota <dominik.b.czarnota@gmail.com>
-Dominik Korman <kormandominik@gmail.com>
-Donald Aingworth <donalds_junk_mail@yahoo.com>
-Eric Backus <eric_backus@alum.mit.edu>
-Eric Fiselier <eric@efcs.ca>
-Eugene Zhuk <eugene.zhuk@gmail.com>
-Evgeny Safronov <division494@gmail.com>
-Fanbo Meng <fanbo.meng@ibm.com>
-Federico Ficarelli <federico.ficarelli@gmail.com>
-Felix Homann <linuxaudio@showlabor.de>
-Geoffrey Martin-Noble <gcmn@google.com> <gmngeoffrey@gmail.com>
-Gergő Szitár <szitar.gergo@gmail.com>
-Hannes Hauswedell <h2@fsfe.org>
-Ismael Jimenez Martinez <ismael.jimenez.martinez@gmail.com>
-Jern-Kuan Leong <jernkuan@gmail.com>
-JianXiong Zhou <zhoujianxiong2@gmail.com>
-Joao Paulo Magalhaes <joaoppmagalhaes@gmail.com>
-John Millikin <jmillikin@stripe.com>
-Jordan Williams <jwillikers@protonmail.com>
-Jussi Knuuttila <jussi.knuuttila@gmail.com>
-Kai Wolf <kai.wolf@gmail.com>
-Kaito Udagawa <umireon@gmail.com>
-Kishan Kumar <kumar.kishan@outlook.com>
-Lei Xu <eddyxu@gmail.com>
-Matt Clarkson <mattyclarkson@gmail.com>
-Maxim Vafin <maxvafin@gmail.com>
-Nick Hutchinson <nshutchinson@gmail.com>
-Norman Heino <norman.heino@gmail.com>
-Oleksandr Sochka <sasha.sochka@gmail.com>
-Ori Livneh <ori.livneh@gmail.com>
-Pascal Leroy <phl@google.com>
-Paul Redmond <paul.redmond@gmail.com>
-Pierre Phaneuf <pphaneuf@google.com>
-Radoslav Yovchev <radoslav.tm@gmail.com>
-Raul Marin <rmrodriguez@cartodb.com>
-Ray Glover <ray.glover@uk.ibm.com>
-Robert Guo <robert.guo@mongodb.com>
-Roman Lebedev <lebedev.ri@gmail.com>
-Sayan Bhattacharjee <aero.sayan@gmail.com>
-Shuo Chen <chenshuo@chenshuo.com>
-Steven Wan <wan.yu@ibm.com>
-Tobias Schmidt <tobias.schmidt@in.tum.de>
-Tobias Ulvgård <tobias.ulvgard@dirac.se>
-Tom Madams <tom.ej.madams@gmail.com> <tmadams@google.com>
-Yixuan Qiu <yixuanq@gmail.com>
-Yusuke Suzuki <utatane.tea@gmail.com>
-Zbigniew Skowron <zbychs@gmail.com>
-Min-Yih Hsu <yihshyng223@gmail.com>
diff --git a/3rdparty/benchmark/LICENSE b/3rdparty/benchmark/LICENSE
deleted file mode 100644
index d6456956..00000000
--- a/3rdparty/benchmark/LICENSE
+++ /dev/null
@@ -1,202 +0,0 @@
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diff --git a/3rdparty/benchmark/README.md b/3rdparty/benchmark/README.md
deleted file mode 100644
index 7b81d960..00000000
--- a/3rdparty/benchmark/README.md
+++ /dev/null
@@ -1,216 +0,0 @@
-# Benchmark
-
-[![build-and-test](https://github.com/google/benchmark/workflows/build-and-test/badge.svg)](https://github.com/google/benchmark/actions?query=workflow%3Abuild-and-test)
-[![bazel](https://github.com/google/benchmark/actions/workflows/bazel.yml/badge.svg)](https://github.com/google/benchmark/actions/workflows/bazel.yml)
-[![pylint](https://github.com/google/benchmark/workflows/pylint/badge.svg)](https://github.com/google/benchmark/actions?query=workflow%3Apylint)
-[![test-bindings](https://github.com/google/benchmark/workflows/test-bindings/badge.svg)](https://github.com/google/benchmark/actions?query=workflow%3Atest-bindings)
-
-[![Build Status](https://travis-ci.org/google/benchmark.svg?branch=master)](https://travis-ci.org/google/benchmark)
-[![Coverage Status](https://coveralls.io/repos/google/benchmark/badge.svg)](https://coveralls.io/r/google/benchmark)
-
-
-A library to benchmark code snippets, similar to unit tests. Example:
-
-```c++
-#include <benchmark/benchmark.h>
-
-static void BM_SomeFunction(benchmark::State& state) {
-  // Perform setup here
-  for (auto _ : state) {
-    // This code gets timed
-    SomeFunction();
-  }
-}
-// Register the function as a benchmark
-BENCHMARK(BM_SomeFunction);
-// Run the benchmark
-BENCHMARK_MAIN();
-```
-
-## Getting Started
-
-To get started, see [Requirements](#requirements) and
-[Installation](#installation). See [Usage](#usage) for a full example and the
-[User Guide](docs/user_guide.md) for a more comprehensive feature overview.
-
-It may also help to read the [Google Test documentation](https://github.com/google/googletest/blob/master/docs/primer.md)
-as some of the structural aspects of the APIs are similar.
-
-## Resources
-
-[Discussion group](https://groups.google.com/d/forum/benchmark-discuss)
-
-IRC channels:
-* [libera](https://libera.chat) #benchmark
-
-[Additional Tooling Documentation](docs/tools.md)
-
-[Assembly Testing Documentation](docs/AssemblyTests.md)
-
-## Requirements
-
-The library can be used with C++03. However, it requires C++11 to build,
-including compiler and standard library support.
-
-The following minimum versions are required to build the library:
-
-* GCC 4.8
-* Clang 3.4
-* Visual Studio 14 2015
-* Intel 2015 Update 1
-
-See [Platform-Specific Build Instructions](docs/platform_specific_build_instructions.md).
-
-## Installation
-
-This describes the installation process using cmake. As pre-requisites, you'll
-need git and cmake installed.
-
-_See [dependencies.md](docs/dependencies.md) for more details regarding supported
-versions of build tools._
-
-```bash
-# Check out the library.
-$ git clone https://github.com/google/benchmark.git
-# Go to the library root directory
-$ cd benchmark
-# Make a build directory to place the build output.
-$ cmake -E make_directory "build"
-# Generate build system files with cmake, and download any dependencies.
-$ cmake -E chdir "build" cmake -DBENCHMARK_DOWNLOAD_DEPENDENCIES=on -DCMAKE_BUILD_TYPE=Release ../
-# or, starting with CMake 3.13, use a simpler form:
-# cmake -DCMAKE_BUILD_TYPE=Release -S . -B "build"
-# Build the library.
-$ cmake --build "build" --config Release
-```
-This builds the `benchmark` and `benchmark_main` libraries and tests.
-On a unix system, the build directory should now look something like this:
-
-```
-/benchmark
-  /build
-    /src
-      /libbenchmark.a
-      /libbenchmark_main.a
-    /test
-      ...
-```
-
-Next, you can run the tests to check the build.
-
-```bash
-$ cmake -E chdir "build" ctest --build-config Release
-```
-
-If you want to install the library globally, also run:
-
-```
-sudo cmake --build "build" --config Release --target install
-```
-
-Note that Google Benchmark requires Google Test to build and run the tests. This
-dependency can be provided two ways:
-
-* Checkout the Google Test sources into `benchmark/googletest`.
-* Otherwise, if `-DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON` is specified during
-  configuration as above, the library will automatically download and build
-  any required dependencies.
-
-If you do not wish to build and run the tests, add `-DBENCHMARK_ENABLE_GTEST_TESTS=OFF`
-to `CMAKE_ARGS`.
-
-### Debug vs Release
-
-By default, benchmark builds as a debug library. You will see a warning in the
-output when this is the case. To build it as a release library instead, add
-`-DCMAKE_BUILD_TYPE=Release` when generating the build system files, as shown
-above. The use of `--config Release` in build commands is needed to properly
-support multi-configuration tools (like Visual Studio for example) and can be
-skipped for other build systems (like Makefile).
-
-To enable link-time optimisation, also add `-DBENCHMARK_ENABLE_LTO=true` when
-generating the build system files.
-
-If you are using gcc, you might need to set `GCC_AR` and `GCC_RANLIB` cmake
-cache variables, if autodetection fails.
-
-If you are using clang, you may need to set `LLVMAR_EXECUTABLE`,
-`LLVMNM_EXECUTABLE` and `LLVMRANLIB_EXECUTABLE` cmake cache variables.
-
-### Stable and Experimental Library Versions
-
-The main branch contains the latest stable version of the benchmarking library;
-the API of which can be considered largely stable, with source breaking changes
-being made only upon the release of a new major version.
-
-Newer, experimental, features are implemented and tested on the
-[`v2` branch](https://github.com/google/benchmark/tree/v2). Users who wish
-to use, test, and provide feedback on the new features are encouraged to try
-this branch. However, this branch provides no stability guarantees and reserves
-the right to change and break the API at any time.
-
-## Usage
-
-### Basic usage
-
-Define a function that executes the code to measure, register it as a benchmark
-function using the `BENCHMARK` macro, and ensure an appropriate `main` function
-is available:
-
-```c++
-#include <benchmark/benchmark.h>
-
-static void BM_StringCreation(benchmark::State& state) {
-  for (auto _ : state)
-    std::string empty_string;
-}
-// Register the function as a benchmark
-BENCHMARK(BM_StringCreation);
-
-// Define another benchmark
-static void BM_StringCopy(benchmark::State& state) {
-  std::string x = "hello";
-  for (auto _ : state)
-    std::string copy(x);
-}
-BENCHMARK(BM_StringCopy);
-
-BENCHMARK_MAIN();
-```
-
-To run the benchmark, compile and link against the `benchmark` library
-(libbenchmark.a/.so). If you followed the build steps above, this library will 
-be under the build directory you created.
-
-```bash
-# Example on linux after running the build steps above. Assumes the
-# `benchmark` and `build` directories are under the current directory.
-$ g++ mybenchmark.cc -std=c++11 -isystem benchmark/include \
-  -Lbenchmark/build/src -lbenchmark -lpthread -o mybenchmark
-```
-
-Alternatively, link against the `benchmark_main` library and remove
-`BENCHMARK_MAIN();` above to get the same behavior.
-
-The compiled executable will run all benchmarks by default. Pass the `--help`
-flag for option information or see the [User Guide](docs/user_guide.md).
-
-### Usage with CMake
-
-If using CMake, it is recommended to link against the project-provided
-`benchmark::benchmark` and `benchmark::benchmark_main` targets using
-`target_link_libraries`.
-It is possible to use ```find_package``` to import an installed version of the
-library.
-```cmake
-find_package(benchmark REQUIRED)
-```
-Alternatively, ```add_subdirectory``` will incorporate the library directly in
-to one's CMake project.
-```cmake
-add_subdirectory(benchmark)
-```
-Either way, link to the library as follows.
-```cmake
-target_link_libraries(MyTarget benchmark::benchmark)
-```
diff --git a/3rdparty/benchmark/WORKSPACE b/3rdparty/benchmark/WORKSPACE
deleted file mode 100644
index 949eb98b..00000000
--- a/3rdparty/benchmark/WORKSPACE
+++ /dev/null
@@ -1,44 +0,0 @@
-workspace(name = "com_github_google_benchmark")
-
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
-
-http_archive(
-    name = "com_google_absl",
-    sha256 = "f41868f7a938605c92936230081175d1eae87f6ea2c248f41077c8f88316f111",
-    strip_prefix = "abseil-cpp-20200225.2",
-    urls = ["https://github.com/abseil/abseil-cpp/archive/20200225.2.tar.gz"],
-)
-
-git_repository(
-    name = "com_google_googletest",
-    remote = "https://github.com/google/googletest.git",
-    tag = "release-1.11.0",
-)
-
-http_archive(
-    name = "pybind11",
-    build_file = "@//bindings/python:pybind11.BUILD",
-    sha256 = "1eed57bc6863190e35637290f97a20c81cfe4d9090ac0a24f3bbf08f265eb71d",
-    strip_prefix = "pybind11-2.4.3",
-    urls = ["https://github.com/pybind/pybind11/archive/v2.4.3.tar.gz"],
-)
-
-new_local_repository(
-    name = "python_headers",
-    build_file = "@//bindings/python:python_headers.BUILD",
-    path = "/usr/include/python3.6",  # May be overwritten by setup.py.
-)
-
-http_archive(
-    name = "rules_python",
-    url = "https://github.com/bazelbuild/rules_python/releases/download/0.1.0/rules_python-0.1.0.tar.gz",
-    sha256 = "b6d46438523a3ec0f3cead544190ee13223a52f6a6765a29eae7b7cc24cc83a0",
-)
-
-load("@rules_python//python:pip.bzl", pip3_install="pip_install")
-
-pip3_install(
-   name = "py_deps",
-   requirements = "//:requirements.txt",
-)
diff --git a/3rdparty/benchmark/_config.yml b/3rdparty/benchmark/_config.yml
deleted file mode 100644
index 1fa5ff85..00000000
--- a/3rdparty/benchmark/_config.yml
+++ /dev/null
@@ -1,2 +0,0 @@
-theme: jekyll-theme-midnight
-markdown: GFM
diff --git a/3rdparty/benchmark/appveyor.yml b/3rdparty/benchmark/appveyor.yml
deleted file mode 100644
index 81da955f..00000000
--- a/3rdparty/benchmark/appveyor.yml
+++ /dev/null
@@ -1,50 +0,0 @@
-version: '{build}'
-
-image: Visual Studio 2017
-
-configuration:
-  - Debug
-  - Release
-
-environment:
-  matrix:
-    - compiler: msvc-15-seh
-      generator: "Visual Studio 15 2017"
-
-    - compiler: msvc-15-seh
-      generator: "Visual Studio 15 2017 Win64"
-
-    - compiler: msvc-14-seh
-      generator: "Visual Studio 14 2015"
-
-    - compiler: msvc-14-seh
-      generator: "Visual Studio 14 2015 Win64"
-
-    - compiler: gcc-5.3.0-posix
-      generator: "MinGW Makefiles"
-      cxx_path: 'C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin'
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-
-matrix:
-  fast_finish: true
-
-install:
-  # git bash conflicts with MinGW makefiles
-  - if "%generator%"=="MinGW Makefiles" (set "PATH=%PATH:C:\Program Files\Git\usr\bin;=%")
-  - if not "%cxx_path%"=="" (set "PATH=%PATH%;%cxx_path%")
-
-build_script:
-  - md _build -Force
-  - cd _build
-  - echo %configuration%
-  - cmake -G "%generator%" "-DCMAKE_BUILD_TYPE=%configuration%" -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON ..
-  - cmake --build . --config %configuration%
-
-test_script:
-  - ctest --build-config %configuration% --timeout 300 --output-on-failure
-
-artifacts:
-  - path: '_build/CMakeFiles/*.log'
-    name: logs
-  - path: '_build/Testing/**/*.xml'
-    name: test_results
diff --git a/3rdparty/benchmark/bindings/python/BUILD b/3rdparty/benchmark/bindings/python/BUILD
deleted file mode 100644
index 9559a76b..00000000
--- a/3rdparty/benchmark/bindings/python/BUILD
+++ /dev/null
@@ -1,3 +0,0 @@
-exports_files(glob(["*.BUILD"]))
-exports_files(["build_defs.bzl"])
-
diff --git a/3rdparty/benchmark/bindings/python/build_defs.bzl b/3rdparty/benchmark/bindings/python/build_defs.bzl
deleted file mode 100644
index 45907aaa..00000000
--- a/3rdparty/benchmark/bindings/python/build_defs.bzl
+++ /dev/null
@@ -1,25 +0,0 @@
-_SHARED_LIB_SUFFIX = {
-    "//conditions:default": ".so",
-    "//:windows": ".dll",
-}
-
-def py_extension(name, srcs, hdrs = [], copts = [], features = [], deps = []):
-    for shared_lib_suffix in _SHARED_LIB_SUFFIX.values():
-        shared_lib_name = name + shared_lib_suffix
-        native.cc_binary(
-            name = shared_lib_name,
-            linkshared = 1,
-            linkstatic = 1,
-            srcs = srcs + hdrs,
-            copts = copts,
-            features = features,
-            deps = deps,
-        )
-
-    return native.py_library(
-        name = name,
-        data = select({
-            platform: [name + shared_lib_suffix]
-            for platform, shared_lib_suffix in _SHARED_LIB_SUFFIX.items()
-        }),
-    )
diff --git a/3rdparty/benchmark/bindings/python/google_benchmark/BUILD b/3rdparty/benchmark/bindings/python/google_benchmark/BUILD
deleted file mode 100644
index 3c1561f4..00000000
--- a/3rdparty/benchmark/bindings/python/google_benchmark/BUILD
+++ /dev/null
@@ -1,38 +0,0 @@
-load("//bindings/python:build_defs.bzl", "py_extension")
-
-py_library(
-    name = "google_benchmark",
-    srcs = ["__init__.py"],
-    visibility = ["//visibility:public"],
-    deps = [
-        ":_benchmark",
-        # pip; absl:app
-    ],
-)
-
-py_extension(
-    name = "_benchmark",
-    srcs = ["benchmark.cc"],
-    copts = [
-        "-fexceptions",
-        "-fno-strict-aliasing",
-    ],
-    features = ["-use_header_modules"],
-    deps = [
-        "//:benchmark",
-        "@pybind11",
-        "@python_headers",
-    ],
-)
-
-py_test(
-    name = "example",
-    srcs = ["example.py"],
-    python_version = "PY3",
-    srcs_version = "PY3",
-    visibility = ["//visibility:public"],
-    deps = [
-        ":google_benchmark",
-    ],
-)
-
diff --git a/3rdparty/benchmark/bindings/python/google_benchmark/__init__.py b/3rdparty/benchmark/bindings/python/google_benchmark/__init__.py
deleted file mode 100644
index ec651c14..00000000
--- a/3rdparty/benchmark/bindings/python/google_benchmark/__init__.py
+++ /dev/null
@@ -1,158 +0,0 @@
-# Copyright 2020 Google Inc. All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Python benchmarking utilities.
-
-Example usage:
-  import google_benchmark as benchmark
-
-  @benchmark.register
-  def my_benchmark(state):
-      ...  # Code executed outside `while` loop is not timed.
-
-      while state:
-        ...  # Code executed within `while` loop is timed.
-
-  if __name__ == '__main__':
-    benchmark.main()
-"""
-
-from absl import app
-from google_benchmark import _benchmark
-from google_benchmark._benchmark import (
-    Counter,
-    kNanosecond,
-    kMicrosecond,
-    kMillisecond,
-    kSecond,
-    oNone,
-    o1,
-    oN,
-    oNSquared,
-    oNCubed,
-    oLogN,
-    oNLogN,
-    oAuto,
-    oLambda,
-)
-
-
-__all__ = [
-    "register",
-    "main",
-    "Counter",
-    "kNanosecond",
-    "kMicrosecond",
-    "kMillisecond",
-    "kSecond",
-    "oNone",
-    "o1",
-    "oN",
-    "oNSquared",
-    "oNCubed",
-    "oLogN",
-    "oNLogN",
-    "oAuto",
-    "oLambda",
-]
-
-__version__ = "1.6.1"
-
-
-class __OptionMaker:
-    """A stateless class to collect benchmark options.
-
-    Collect all decorator calls like @option.range(start=0, limit=1<<5).
-    """
-
-    class Options:
-        """Pure data class to store options calls, along with the benchmarked function."""
-
-        def __init__(self, func):
-            self.func = func
-            self.builder_calls = []
-
-    @classmethod
-    def make(cls, func_or_options):
-        """Make Options from Options or the benchmarked function."""
-        if isinstance(func_or_options, cls.Options):
-            return func_or_options
-        return cls.Options(func_or_options)
-
-    def __getattr__(self, builder_name):
-        """Append option call in the Options."""
-
-        # The function that get returned on @option.range(start=0, limit=1<<5).
-        def __builder_method(*args, **kwargs):
-
-            # The decorator that get called, either with the benchmared function
-            # or the previous Options
-            def __decorator(func_or_options):
-                options = self.make(func_or_options)
-                options.builder_calls.append((builder_name, args, kwargs))
-                # The decorator returns Options so it is not technically a decorator
-                # and needs a final call to @regiser
-                return options
-
-            return __decorator
-
-        return __builder_method
-
-
-# Alias for nicer API.
-# We have to instantiate an object, even if stateless, to be able to use __getattr__
-# on option.range
-option = __OptionMaker()
-
-
-def register(undefined=None, *, name=None):
-    """Register function for benchmarking."""
-    if undefined is None:
-        # Decorator is called without parenthesis so we return a decorator
-        return lambda f: register(f, name=name)
-
-    # We have either the function to benchmark (simple case) or an instance of Options
-    # (@option._ case).
-    options = __OptionMaker.make(undefined)
-
-    if name is None:
-        name = options.func.__name__
-
-    # We register the benchmark and reproduce all the @option._ calls onto the
-    # benchmark builder pattern
-    benchmark = _benchmark.RegisterBenchmark(name, options.func)
-    for name, args, kwargs in options.builder_calls[::-1]:
-        getattr(benchmark, name)(*args, **kwargs)
-
-    # return the benchmarked function because the decorator does not modify it
-    return options.func
-
-
-def _flags_parser(argv):
-    argv = _benchmark.Initialize(argv)
-    return app.parse_flags_with_usage(argv)
-
-
-def _run_benchmarks(argv):
-    if len(argv) > 1:
-        raise app.UsageError("Too many command-line arguments.")
-    return _benchmark.RunSpecifiedBenchmarks()
-
-
-def main(argv=None):
-    return app.run(_run_benchmarks, argv=argv, flags_parser=_flags_parser)
-
-
-# Methods for use with custom main function.
-initialize = _benchmark.Initialize
-run_benchmarks = _benchmark.RunSpecifiedBenchmarks
diff --git a/3rdparty/benchmark/bindings/python/google_benchmark/benchmark.cc b/3rdparty/benchmark/bindings/python/google_benchmark/benchmark.cc
deleted file mode 100644
index 02b6ed7e..00000000
--- a/3rdparty/benchmark/bindings/python/google_benchmark/benchmark.cc
+++ /dev/null
@@ -1,181 +0,0 @@
-// Benchmark for Python.
-
-#include <map>
-#include <string>
-#include <vector>
-
-#include "pybind11/operators.h"
-#include "pybind11/pybind11.h"
-#include "pybind11/stl.h"
-#include "pybind11/stl_bind.h"
-
-#include "benchmark/benchmark.h"
-
-PYBIND11_MAKE_OPAQUE(benchmark::UserCounters);
-
-namespace {
-namespace py = ::pybind11;
-
-std::vector<std::string> Initialize(const std::vector<std::string>& argv) {
-  // The `argv` pointers here become invalid when this function returns, but
-  // benchmark holds the pointer to `argv[0]`. We create a static copy of it
-  // so it persists, and replace the pointer below.
-  static std::string executable_name(argv[0]);
-  std::vector<char*> ptrs;
-  ptrs.reserve(argv.size());
-  for (auto& arg : argv) {
-    ptrs.push_back(const_cast<char*>(arg.c_str()));
-  }
-  ptrs[0] = const_cast<char*>(executable_name.c_str());
-  int argc = static_cast<int>(argv.size());
-  benchmark::Initialize(&argc, ptrs.data());
-  std::vector<std::string> remaining_argv;
-  remaining_argv.reserve(argc);
-  for (int i = 0; i < argc; ++i) {
-    remaining_argv.emplace_back(ptrs[i]);
-  }
-  return remaining_argv;
-}
-
-benchmark::internal::Benchmark* RegisterBenchmark(const char* name,
-                                                  py::function f) {
-  return benchmark::RegisterBenchmark(
-      name, [f](benchmark::State& state) { f(&state); });
-}
-
-PYBIND11_MODULE(_benchmark, m) {
-  using benchmark::TimeUnit;
-  py::enum_<TimeUnit>(m, "TimeUnit")
-      .value("kNanosecond", TimeUnit::kNanosecond)
-      .value("kMicrosecond", TimeUnit::kMicrosecond)
-      .value("kMillisecond", TimeUnit::kMillisecond)
-      .value("kSecond", TimeUnit::kSecond)
-      .export_values();
-
-  using benchmark::BigO;
-  py::enum_<BigO>(m, "BigO")
-      .value("oNone", BigO::oNone)
-      .value("o1", BigO::o1)
-      .value("oN", BigO::oN)
-      .value("oNSquared", BigO::oNSquared)
-      .value("oNCubed", BigO::oNCubed)
-      .value("oLogN", BigO::oLogN)
-      .value("oNLogN", BigO::oLogN)
-      .value("oAuto", BigO::oAuto)
-      .value("oLambda", BigO::oLambda)
-      .export_values();
-
-  using benchmark::internal::Benchmark;
-  py::class_<Benchmark>(m, "Benchmark")
-      // For methods returning a pointer tor the current object, reference
-      // return policy is used to ask pybind not to take ownership oof the
-      // returned object and avoid calling delete on it.
-      // https://pybind11.readthedocs.io/en/stable/advanced/functions.html#return-value-policies
-      //
-      // For methods taking a const std::vector<...>&, a copy is created
-      // because a it is bound to a Python list.
-      // https://pybind11.readthedocs.io/en/stable/advanced/cast/stl.html
-      .def("unit", &Benchmark::Unit, py::return_value_policy::reference)
-      .def("arg", &Benchmark::Arg, py::return_value_policy::reference)
-      .def("args", &Benchmark::Args, py::return_value_policy::reference)
-      .def("range", &Benchmark::Range, py::return_value_policy::reference,
-           py::arg("start"), py::arg("limit"))
-      .def("dense_range", &Benchmark::DenseRange,
-           py::return_value_policy::reference, py::arg("start"),
-           py::arg("limit"), py::arg("step") = 1)
-      .def("ranges", &Benchmark::Ranges, py::return_value_policy::reference)
-      .def("args_product", &Benchmark::ArgsProduct,
-           py::return_value_policy::reference)
-      .def("arg_name", &Benchmark::ArgName, py::return_value_policy::reference)
-      .def("arg_names", &Benchmark::ArgNames,
-           py::return_value_policy::reference)
-      .def("range_pair", &Benchmark::RangePair,
-           py::return_value_policy::reference, py::arg("lo1"), py::arg("hi1"),
-           py::arg("lo2"), py::arg("hi2"))
-      .def("range_multiplier", &Benchmark::RangeMultiplier,
-           py::return_value_policy::reference)
-      .def("min_time", &Benchmark::MinTime, py::return_value_policy::reference)
-      .def("iterations", &Benchmark::Iterations,
-           py::return_value_policy::reference)
-      .def("repetitions", &Benchmark::Repetitions,
-           py::return_value_policy::reference)
-      .def("report_aggregates_only", &Benchmark::ReportAggregatesOnly,
-           py::return_value_policy::reference, py::arg("value") = true)
-      .def("display_aggregates_only", &Benchmark::DisplayAggregatesOnly,
-           py::return_value_policy::reference, py::arg("value") = true)
-      .def("measure_process_cpu_time", &Benchmark::MeasureProcessCPUTime,
-           py::return_value_policy::reference)
-      .def("use_real_time", &Benchmark::UseRealTime,
-           py::return_value_policy::reference)
-      .def("use_manual_time", &Benchmark::UseManualTime,
-           py::return_value_policy::reference)
-      .def(
-          "complexity",
-          (Benchmark * (Benchmark::*)(benchmark::BigO)) & Benchmark::Complexity,
-          py::return_value_policy::reference,
-          py::arg("complexity") = benchmark::oAuto);
-
-  using benchmark::Counter;
-  py::class_<Counter> py_counter(m, "Counter");
-
-  py::enum_<Counter::Flags>(py_counter, "Flags")
-      .value("kDefaults", Counter::Flags::kDefaults)
-      .value("kIsRate", Counter::Flags::kIsRate)
-      .value("kAvgThreads", Counter::Flags::kAvgThreads)
-      .value("kAvgThreadsRate", Counter::Flags::kAvgThreadsRate)
-      .value("kIsIterationInvariant", Counter::Flags::kIsIterationInvariant)
-      .value("kIsIterationInvariantRate",
-             Counter::Flags::kIsIterationInvariantRate)
-      .value("kAvgIterations", Counter::Flags::kAvgIterations)
-      .value("kAvgIterationsRate", Counter::Flags::kAvgIterationsRate)
-      .value("kInvert", Counter::Flags::kInvert)
-      .export_values()
-      .def(py::self | py::self);
-
-  py::enum_<Counter::OneK>(py_counter, "OneK")
-      .value("kIs1000", Counter::OneK::kIs1000)
-      .value("kIs1024", Counter::OneK::kIs1024)
-      .export_values();
-
-  py_counter
-      .def(py::init<double, Counter::Flags, Counter::OneK>(),
-           py::arg("value") = 0., py::arg("flags") = Counter::kDefaults,
-           py::arg("k") = Counter::kIs1000)
-      .def(py::init([](double value) { return Counter(value); }))
-      .def_readwrite("value", &Counter::value)
-      .def_readwrite("flags", &Counter::flags)
-      .def_readwrite("oneK", &Counter::oneK);
-  py::implicitly_convertible<py::float_, Counter>();
-  py::implicitly_convertible<py::int_, Counter>();
-
-  py::bind_map<benchmark::UserCounters>(m, "UserCounters");
-
-  using benchmark::State;
-  py::class_<State>(m, "State")
-      .def("__bool__", &State::KeepRunning)
-      .def_property_readonly("keep_running", &State::KeepRunning)
-      .def("pause_timing", &State::PauseTiming)
-      .def("resume_timing", &State::ResumeTiming)
-      .def("skip_with_error", &State::SkipWithError)
-      .def_property_readonly("error_occurred", &State::error_occurred)
-      .def("set_iteration_time", &State::SetIterationTime)
-      .def_property("bytes_processed", &State::bytes_processed,
-                    &State::SetBytesProcessed)
-      .def_property("complexity_n", &State::complexity_length_n,
-                    &State::SetComplexityN)
-      .def_property("items_processed", &State::items_processed,
-                    &State::SetItemsProcessed)
-      .def("set_label", (void(State::*)(const char*)) & State::SetLabel)
-      .def("range", &State::range, py::arg("pos") = 0)
-      .def_property_readonly("iterations", &State::iterations)
-      .def_readwrite("counters", &State::counters)
-      .def_property_readonly("thread_index", &State::thread_index)
-      .def_property_readonly("threads", &State::threads);
-
-  m.def("Initialize", Initialize);
-  m.def("RegisterBenchmark", RegisterBenchmark,
-        py::return_value_policy::reference);
-  m.def("RunSpecifiedBenchmarks",
-        []() { benchmark::RunSpecifiedBenchmarks(); });
-};
-}  // namespace
diff --git a/3rdparty/benchmark/bindings/python/google_benchmark/example.py b/3rdparty/benchmark/bindings/python/google_benchmark/example.py
deleted file mode 100644
index 487acc9f..00000000
--- a/3rdparty/benchmark/bindings/python/google_benchmark/example.py
+++ /dev/null
@@ -1,136 +0,0 @@
-# Copyright 2020 Google Inc. All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Example of Python using C++ benchmark framework.
-
-To run this example, you must first install the `google_benchmark` Python package.
-
-To install using `setup.py`, download and extract the `google_benchmark` source.
-In the extracted directory, execute:
-  python setup.py install
-"""
-
-import random
-import time
-
-import google_benchmark as benchmark
-from google_benchmark import Counter
-
-
-@benchmark.register
-def empty(state):
-    while state:
-        pass
-
-
-@benchmark.register
-def sum_million(state):
-    while state:
-        sum(range(1_000_000))
-
-@benchmark.register
-def pause_timing(state):
-    """Pause timing every iteration."""
-    while state:
-        # Construct a list of random ints every iteration without timing it
-        state.pause_timing()
-        random_list = [random.randint(0, 100) for _ in range(100)]
-        state.resume_timing()
-        # Time the in place sorting algorithm
-        random_list.sort()
-
-
-@benchmark.register
-def skipped(state):
-    if True:  # Test some predicate here.
-        state.skip_with_error("some error")
-        return  # NOTE: You must explicitly return, or benchmark will continue.
-
-    ...  # Benchmark code would be here.
-
-
-@benchmark.register
-def manual_timing(state):
-    while state:
-        # Manually count Python CPU time
-        start = time.perf_counter()  # perf_counter_ns() in Python 3.7+
-        # Something to benchmark
-        time.sleep(0.01)
-        end = time.perf_counter()
-        state.set_iteration_time(end - start)
-
-
-@benchmark.register
-def custom_counters(state):
-    """Collect cutom metric using benchmark.Counter."""
-    num_foo = 0.0
-    while state:
-        # Benchmark some code here
-        pass
-        # Collect some custom metric named foo
-        num_foo += 0.13
-
-    # Automatic Counter from numbers.
-    state.counters["foo"] = num_foo
-    # Set a counter as a rate.
-    state.counters["foo_rate"] = Counter(num_foo, Counter.kIsRate)
-    #  Set a counter as an inverse of rate.
-    state.counters["foo_inv_rate"] = Counter(num_foo, Counter.kIsRate | Counter.kInvert)
-    # Set a counter as a thread-average quantity.
-    state.counters["foo_avg"] = Counter(num_foo, Counter.kAvgThreads)
-    # There's also a combined flag:
-    state.counters["foo_avg_rate"] = Counter(num_foo, Counter.kAvgThreadsRate)
-
-
-@benchmark.register
-@benchmark.option.measure_process_cpu_time()
-@benchmark.option.use_real_time()
-def with_options(state):
-    while state:
-        sum(range(1_000_000))
-
-
-@benchmark.register(name="sum_million_microseconds")
-@benchmark.option.unit(benchmark.kMicrosecond)
-def with_options2(state):
-    while state:
-        sum(range(1_000_000))
-
-
-@benchmark.register
-@benchmark.option.arg(100)
-@benchmark.option.arg(1000)
-def passing_argument(state):
-    while state:
-        sum(range(state.range(0)))
-
-
-@benchmark.register
-@benchmark.option.range(8, limit=8 << 10)
-def using_range(state):
-    while state:
-        sum(range(state.range(0)))
-
-
-@benchmark.register
-@benchmark.option.range_multiplier(2)
-@benchmark.option.range(1 << 10, 1 << 18)
-@benchmark.option.complexity(benchmark.oN)
-def computing_complexity(state):
-    while state:
-        sum(range(state.range(0)))
-    state.complexity_n = state.range(0)
-
-
-if __name__ == "__main__":
-    benchmark.main()
diff --git a/3rdparty/benchmark/bindings/python/pybind11.BUILD b/3rdparty/benchmark/bindings/python/pybind11.BUILD
deleted file mode 100644
index bc833500..00000000
--- a/3rdparty/benchmark/bindings/python/pybind11.BUILD
+++ /dev/null
@@ -1,20 +0,0 @@
-cc_library(
-    name = "pybind11",
-    hdrs = glob(
-        include = [
-            "include/pybind11/*.h",
-            "include/pybind11/detail/*.h",
-        ],
-        exclude = [
-            "include/pybind11/common.h",
-            "include/pybind11/eigen.h",
-        ],
-    ),
-    copts = [
-        "-fexceptions",
-        "-Wno-undefined-inline",
-        "-Wno-pragma-once-outside-header",
-    ],
-    includes = ["include"],
-    visibility = ["//visibility:public"],
-)
diff --git a/3rdparty/benchmark/bindings/python/python_headers.BUILD b/3rdparty/benchmark/bindings/python/python_headers.BUILD
deleted file mode 100644
index 9c34cf6c..00000000
--- a/3rdparty/benchmark/bindings/python/python_headers.BUILD
+++ /dev/null
@@ -1,6 +0,0 @@
-cc_library(
-    name = "python_headers",
-    hdrs = glob(["**/*.h"]),
-    includes = ["."],
-    visibility = ["//visibility:public"],
-)
diff --git a/3rdparty/benchmark/bindings/python/requirements.txt b/3rdparty/benchmark/bindings/python/requirements.txt
deleted file mode 100644
index f5bbe7ec..00000000
--- a/3rdparty/benchmark/bindings/python/requirements.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-absl-py>=0.7.1
-
diff --git a/3rdparty/benchmark/cmake/AddCXXCompilerFlag.cmake b/3rdparty/benchmark/cmake/AddCXXCompilerFlag.cmake
deleted file mode 100644
index 858589e9..00000000
--- a/3rdparty/benchmark/cmake/AddCXXCompilerFlag.cmake
+++ /dev/null
@@ -1,78 +0,0 @@
-# - Adds a compiler flag if it is supported by the compiler
-#
-# This function checks that the supplied compiler flag is supported and then
-# adds it to the corresponding compiler flags
-#
-#  add_cxx_compiler_flag(<FLAG> [<VARIANT>])
-#
-# - Example
-#
-# include(AddCXXCompilerFlag)
-# add_cxx_compiler_flag(-Wall)
-# add_cxx_compiler_flag(-no-strict-aliasing RELEASE)
-# Requires CMake 2.6+
-
-if(__add_cxx_compiler_flag)
-  return()
-endif()
-set(__add_cxx_compiler_flag INCLUDED)
-
-include(CheckCXXCompilerFlag)
-
-function(mangle_compiler_flag FLAG OUTPUT)
-  string(TOUPPER "HAVE_CXX_FLAG_${FLAG}" SANITIZED_FLAG)
-  string(REPLACE "+" "X" SANITIZED_FLAG ${SANITIZED_FLAG})
-  string(REGEX REPLACE "[^A-Za-z_0-9]" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
-  string(REGEX REPLACE "_+" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
-  set(${OUTPUT} "${SANITIZED_FLAG}" PARENT_SCOPE)
-endfunction(mangle_compiler_flag)
-
-function(add_cxx_compiler_flag FLAG)
-  mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
-  set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
-  set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}")
-  check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
-  set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
-  if(${MANGLED_FLAG})
-    if(ARGC GREATER 1)
-      set(VARIANT ${ARGV1})
-      string(TOUPPER "_${VARIANT}" VARIANT)
-    else()
-      set(VARIANT "")
-    endif()
-    set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${BENCHMARK_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
-  endif()
-endfunction()
-
-function(add_required_cxx_compiler_flag FLAG)
-  mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
-  set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
-  set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}")
-  check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
-  set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
-  if(${MANGLED_FLAG})
-    if(ARGC GREATER 1)
-      set(VARIANT ${ARGV1})
-      string(TOUPPER "_${VARIANT}" VARIANT)
-    else()
-      set(VARIANT "")
-    endif()
-    set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
-    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
-    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
-    set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
-    set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}" PARENT_SCOPE)
-  else()
-    message(FATAL_ERROR "Required flag '${FLAG}' is not supported by the compiler")
-  endif()
-endfunction()
-
-function(check_cxx_warning_flag FLAG)
-  mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
-  set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
-  # Add -Werror to ensure the compiler generates an error if the warning flag
-  # doesn't exist.
-  set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror ${FLAG}")
-  check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
-  set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
-endfunction()
diff --git a/3rdparty/benchmark/cmake/CXXFeatureCheck.cmake b/3rdparty/benchmark/cmake/CXXFeatureCheck.cmake
deleted file mode 100644
index 62e6741f..00000000
--- a/3rdparty/benchmark/cmake/CXXFeatureCheck.cmake
+++ /dev/null
@@ -1,69 +0,0 @@
-# - Compile and run code to check for C++ features
-#
-# This functions compiles a source file under the `cmake` folder
-# and adds the corresponding `HAVE_[FILENAME]` flag to the CMake
-# environment
-#
-#  cxx_feature_check(<FLAG> [<VARIANT>])
-#
-# - Example
-#
-# include(CXXFeatureCheck)
-# cxx_feature_check(STD_REGEX)
-# Requires CMake 2.8.12+
-
-if(__cxx_feature_check)
-  return()
-endif()
-set(__cxx_feature_check INCLUDED)
-
-function(cxx_feature_check FILE)
-  string(TOLOWER ${FILE} FILE)
-  string(TOUPPER ${FILE} VAR)
-  string(TOUPPER "HAVE_${VAR}" FEATURE)
-  if (DEFINED HAVE_${VAR})
-    set(HAVE_${VAR} 1 PARENT_SCOPE)
-    add_definitions(-DHAVE_${VAR})
-    return()
-  endif()
-
-  if (ARGC GREATER 1)
-    message(STATUS "Enabling additional flags: ${ARGV1}")
-    list(APPEND BENCHMARK_CXX_LINKER_FLAGS ${ARGV1})
-  endif()
-
-  if (NOT DEFINED COMPILE_${FEATURE})
-    message(STATUS "Performing Test ${FEATURE}")
-    if(CMAKE_CROSSCOMPILING)
-      try_compile(COMPILE_${FEATURE}
-              ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp
-              CMAKE_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS}
-              LINK_LIBRARIES ${BENCHMARK_CXX_LIBRARIES})
-      if(COMPILE_${FEATURE})
-        message(WARNING
-              "If you see build failures due to cross compilation, try setting HAVE_${VAR} to 0")
-        set(RUN_${FEATURE} 0 CACHE INTERNAL "")
-      else()
-        set(RUN_${FEATURE} 1 CACHE INTERNAL "")
-      endif()
-    else()
-      message(STATUS "Performing Test ${FEATURE}")
-      try_run(RUN_${FEATURE} COMPILE_${FEATURE}
-              ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp
-              CMAKE_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS}
-              LINK_LIBRARIES ${BENCHMARK_CXX_LIBRARIES})
-    endif()
-  endif()
-
-  if(RUN_${FEATURE} EQUAL 0)
-    message(STATUS "Performing Test ${FEATURE} -- success")
-    set(HAVE_${VAR} 1 PARENT_SCOPE)
-    add_definitions(-DHAVE_${VAR})
-  else()
-    if(NOT COMPILE_${FEATURE})
-      message(STATUS "Performing Test ${FEATURE} -- failed to compile")
-    else()
-      message(STATUS "Performing Test ${FEATURE} -- compiled but failed to run")
-    endif()
-  endif()
-endfunction()
diff --git a/3rdparty/benchmark/cmake/Config.cmake.in b/3rdparty/benchmark/cmake/Config.cmake.in
deleted file mode 100644
index 2e15f0cf..00000000
--- a/3rdparty/benchmark/cmake/Config.cmake.in
+++ /dev/null
@@ -1,7 +0,0 @@
-@PACKAGE_INIT@
-
-include (CMakeFindDependencyMacro)
-
-find_dependency (Threads)
-
-include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")
diff --git a/3rdparty/benchmark/cmake/GetGitVersion.cmake b/3rdparty/benchmark/cmake/GetGitVersion.cmake
deleted file mode 100644
index 04a1f9b7..00000000
--- a/3rdparty/benchmark/cmake/GetGitVersion.cmake
+++ /dev/null
@@ -1,58 +0,0 @@
-# - Returns a version string from Git tags
-#
-# This function inspects the annotated git tags for the project and returns a string
-# into a CMake variable
-#
-#  get_git_version(<var>)
-#
-# - Example
-#
-# include(GetGitVersion)
-# get_git_version(GIT_VERSION)
-#
-# Requires CMake 2.8.11+
-find_package(Git)
-
-if(__get_git_version)
-  return()
-endif()
-set(__get_git_version INCLUDED)
-
-function(get_git_version var)
-  if(GIT_EXECUTABLE)
-      execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags --match "v[0-9]*.[0-9]*.[0-9]*" --abbrev=8
-          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-          RESULT_VARIABLE status
-          OUTPUT_VARIABLE GIT_DESCRIBE_VERSION
-          ERROR_QUIET)
-      if(status)
-          set(GIT_DESCRIBE_VERSION "v0.0.0")
-      endif()
-      
-      string(STRIP ${GIT_DESCRIBE_VERSION} GIT_DESCRIBE_VERSION)
-      if(GIT_DESCRIBE_VERSION MATCHES v[^-]*-) 
-         string(REGEX REPLACE "v([^-]*)-([0-9]+)-.*" "\\1.\\2"  GIT_VERSION ${GIT_DESCRIBE_VERSION})
-      else()
-         string(REGEX REPLACE "v(.*)" "\\1" GIT_VERSION ${GIT_DESCRIBE_VERSION})
-      endif()
-
-      # Work out if the repository is dirty
-      execute_process(COMMAND ${GIT_EXECUTABLE} update-index -q --refresh
-          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-          OUTPUT_QUIET
-          ERROR_QUIET)
-      execute_process(COMMAND ${GIT_EXECUTABLE} diff-index --name-only HEAD --
-          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-          OUTPUT_VARIABLE GIT_DIFF_INDEX
-          ERROR_QUIET)
-      string(COMPARE NOTEQUAL "${GIT_DIFF_INDEX}" "" GIT_DIRTY)
-      if (${GIT_DIRTY})
-          set(GIT_DESCRIBE_VERSION "${GIT_DESCRIBE_VERSION}-dirty")
-      endif()
-      message(STATUS "git version: ${GIT_DESCRIBE_VERSION} normalized to ${GIT_VERSION}")
-  else()
-      set(GIT_VERSION "0.0.0")
-  endif()
-
-  set(${var} ${GIT_VERSION} PARENT_SCOPE)
-endfunction()
diff --git a/3rdparty/benchmark/cmake/GoogleTest.cmake b/3rdparty/benchmark/cmake/GoogleTest.cmake
deleted file mode 100644
index 66cb9100..00000000
--- a/3rdparty/benchmark/cmake/GoogleTest.cmake
+++ /dev/null
@@ -1,48 +0,0 @@
-# Download and unpack googletest at configure time
-set(GOOGLETEST_PREFIX "${benchmark_BINARY_DIR}/third_party/googletest")
-configure_file(${benchmark_SOURCE_DIR}/cmake/GoogleTest.cmake.in ${GOOGLETEST_PREFIX}/CMakeLists.txt @ONLY)
-
-set(GOOGLETEST_PATH "${CMAKE_CURRENT_SOURCE_DIR}/googletest" CACHE PATH "") # Mind the quotes
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}"
-  -DALLOW_DOWNLOADING_GOOGLETEST=${BENCHMARK_DOWNLOAD_DEPENDENCIES} -DGOOGLETEST_PATH:PATH=${GOOGLETEST_PATH} .
-  RESULT_VARIABLE result
-  WORKING_DIRECTORY ${GOOGLETEST_PREFIX}
-)
-
-if(result)
-  message(FATAL_ERROR "CMake step for googletest failed: ${result}")
-endif()
-
-execute_process(
-  COMMAND ${CMAKE_COMMAND} --build .
-  RESULT_VARIABLE result
-  WORKING_DIRECTORY ${GOOGLETEST_PREFIX}
-)
-
-if(result)
-  message(FATAL_ERROR "Build step for googletest failed: ${result}")
-endif()
-
-# Prevent overriding the parent project's compiler/linker
-# settings on Windows
-set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-
-include(${GOOGLETEST_PREFIX}/googletest-paths.cmake)
-
-# googletest doesn't seem to want to stay build warning clean so let's not hurt ourselves.
-add_compile_options(-w)
-
-# Add googletest directly to our build. This defines
-# the gtest and gtest_main targets.
-add_subdirectory(${GOOGLETEST_SOURCE_DIR}
-                 ${GOOGLETEST_BINARY_DIR}
-                 EXCLUDE_FROM_ALL)
-
-if(NOT DEFINED GTEST_COMPILE_COMMANDS)
-    set(GTEST_COMPILE_COMMANDS ON)
-endif()
-
-set_target_properties(gtest PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gtest,INTERFACE_INCLUDE_DIRECTORIES> EXPORT_COMPILE_COMMANDS ${GTEST_COMPILE_COMMANDS})
-set_target_properties(gtest_main PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gtest_main,INTERFACE_INCLUDE_DIRECTORIES> EXPORT_COMPILE_COMMANDS ${GTEST_COMPILE_COMMANDS})
-set_target_properties(gmock PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gmock,INTERFACE_INCLUDE_DIRECTORIES> EXPORT_COMPILE_COMMANDS ${GTEST_COMPILE_COMMANDS})
-set_target_properties(gmock_main PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gmock_main,INTERFACE_INCLUDE_DIRECTORIES> EXPORT_COMPILE_COMMANDS ${GTEST_COMPILE_COMMANDS})
diff --git a/3rdparty/benchmark/cmake/GoogleTest.cmake.in b/3rdparty/benchmark/cmake/GoogleTest.cmake.in
deleted file mode 100644
index ce653ac3..00000000
--- a/3rdparty/benchmark/cmake/GoogleTest.cmake.in
+++ /dev/null
@@ -1,59 +0,0 @@
-cmake_minimum_required(VERSION 2.8.12)
-
-project(googletest-download NONE)
-
-# Enable ExternalProject CMake module
-include(ExternalProject)
-
-option(ALLOW_DOWNLOADING_GOOGLETEST "If googletest src tree is not found in location specified by GOOGLETEST_PATH, do fetch the archive from internet" OFF)
-set(GOOGLETEST_PATH "/usr/src/googletest" CACHE PATH
-                    "Path to the googletest root tree. Should contain googletest and googlemock subdirs. And CMakeLists.txt in root, and in both of these subdirs")
-
-# Download and install GoogleTest
-
-message(STATUS "Looking for Google Test sources")
-message(STATUS "Looking for Google Test sources in ${GOOGLETEST_PATH}")
-if(EXISTS "${GOOGLETEST_PATH}"            AND IS_DIRECTORY "${GOOGLETEST_PATH}"            AND EXISTS "${GOOGLETEST_PATH}/CMakeLists.txt" AND
-   EXISTS "${GOOGLETEST_PATH}/googletest" AND IS_DIRECTORY "${GOOGLETEST_PATH}/googletest" AND EXISTS "${GOOGLETEST_PATH}/googletest/CMakeLists.txt" AND
-   EXISTS "${GOOGLETEST_PATH}/googlemock" AND IS_DIRECTORY "${GOOGLETEST_PATH}/googlemock" AND EXISTS "${GOOGLETEST_PATH}/googlemock/CMakeLists.txt")
-  message(STATUS "Found Google Test in ${GOOGLETEST_PATH}")
-
-  ExternalProject_Add(
-    googletest
-    PREFIX            "${CMAKE_BINARY_DIR}"
-    DOWNLOAD_DIR      "${CMAKE_BINARY_DIR}/download"
-    SOURCE_DIR        "${GOOGLETEST_PATH}" # use existing src dir.
-    BINARY_DIR        "${CMAKE_BINARY_DIR}/build"
-    CONFIGURE_COMMAND ""
-    BUILD_COMMAND     ""
-    INSTALL_COMMAND   ""
-    TEST_COMMAND      ""
-  )
-else()
-  if(NOT ALLOW_DOWNLOADING_GOOGLETEST)
-    message(SEND_ERROR "Did not find Google Test sources! Either pass correct path in GOOGLETEST_PATH, or enable BENCHMARK_DOWNLOAD_DEPENDENCIES, or disable BENCHMARK_USE_BUNDLED_GTEST, or disable BENCHMARK_ENABLE_GTEST_TESTS / BENCHMARK_ENABLE_TESTING.")
-    return()
-  else()
-    message(WARNING "Did not find Google Test sources! Fetching from web...")
-    ExternalProject_Add(
-      googletest
-      GIT_REPOSITORY    https://github.com/google/googletest.git
-      GIT_TAG           "release-1.11.0"
-      PREFIX            "${CMAKE_BINARY_DIR}"
-      STAMP_DIR         "${CMAKE_BINARY_DIR}/stamp"
-      DOWNLOAD_DIR      "${CMAKE_BINARY_DIR}/download"
-      SOURCE_DIR        "${CMAKE_BINARY_DIR}/src"
-      BINARY_DIR        "${CMAKE_BINARY_DIR}/build"
-      CONFIGURE_COMMAND ""
-      BUILD_COMMAND     ""
-      INSTALL_COMMAND   ""
-      TEST_COMMAND      ""
-    )
-  endif()
-endif()
-
-ExternalProject_Get_Property(googletest SOURCE_DIR BINARY_DIR)
-file(WRITE googletest-paths.cmake
-"set(GOOGLETEST_SOURCE_DIR \"${SOURCE_DIR}\")
-set(GOOGLETEST_BINARY_DIR \"${BINARY_DIR}\")
-")
diff --git a/3rdparty/benchmark/cmake/Modules/FindLLVMAr.cmake b/3rdparty/benchmark/cmake/Modules/FindLLVMAr.cmake
deleted file mode 100644
index 23469813..00000000
--- a/3rdparty/benchmark/cmake/Modules/FindLLVMAr.cmake
+++ /dev/null
@@ -1,16 +0,0 @@
-include(FeatureSummary)
-
-find_program(LLVMAR_EXECUTABLE
-  NAMES llvm-ar
-  DOC "The llvm-ar executable"
-  )
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(LLVMAr
-  DEFAULT_MSG
-  LLVMAR_EXECUTABLE)
-
-SET_PACKAGE_PROPERTIES(LLVMAr PROPERTIES
-  URL https://llvm.org/docs/CommandGuide/llvm-ar.html
-  DESCRIPTION "create, modify, and extract from archives"
-)
diff --git a/3rdparty/benchmark/cmake/Modules/FindLLVMNm.cmake b/3rdparty/benchmark/cmake/Modules/FindLLVMNm.cmake
deleted file mode 100644
index e56430a0..00000000
--- a/3rdparty/benchmark/cmake/Modules/FindLLVMNm.cmake
+++ /dev/null
@@ -1,16 +0,0 @@
-include(FeatureSummary)
-
-find_program(LLVMNM_EXECUTABLE
-  NAMES llvm-nm
-  DOC "The llvm-nm executable"
-  )
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(LLVMNm
-  DEFAULT_MSG
-  LLVMNM_EXECUTABLE)
-
-SET_PACKAGE_PROPERTIES(LLVMNm PROPERTIES
-  URL https://llvm.org/docs/CommandGuide/llvm-nm.html
-  DESCRIPTION "list LLVM bitcode and object file’s symbol table"
-)
diff --git a/3rdparty/benchmark/cmake/Modules/FindLLVMRanLib.cmake b/3rdparty/benchmark/cmake/Modules/FindLLVMRanLib.cmake
deleted file mode 100644
index 7b53e1a7..00000000
--- a/3rdparty/benchmark/cmake/Modules/FindLLVMRanLib.cmake
+++ /dev/null
@@ -1,15 +0,0 @@
-include(FeatureSummary)
-
-find_program(LLVMRANLIB_EXECUTABLE
-  NAMES llvm-ranlib
-  DOC "The llvm-ranlib executable"
-  )
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(LLVMRanLib
-  DEFAULT_MSG
-  LLVMRANLIB_EXECUTABLE)
-
-SET_PACKAGE_PROPERTIES(LLVMRanLib PROPERTIES
-  DESCRIPTION "generate index for LLVM archive"
-)
diff --git a/3rdparty/benchmark/cmake/Modules/FindPFM.cmake b/3rdparty/benchmark/cmake/Modules/FindPFM.cmake
deleted file mode 100644
index cf807a1e..00000000
--- a/3rdparty/benchmark/cmake/Modules/FindPFM.cmake
+++ /dev/null
@@ -1,26 +0,0 @@
-# If successful, the following variables will be defined:
-# HAVE_LIBPFM.
-# Set BENCHMARK_ENABLE_LIBPFM to 0 to disable, regardless of libpfm presence.
-include(CheckIncludeFile)
-include(CheckLibraryExists)
-include(FeatureSummary)
-enable_language(C)
-
-set_package_properties(PFM PROPERTIES
-                       URL http://perfmon2.sourceforge.net/
-                       DESCRIPTION "a helper library to develop monitoring tools"
-                       PURPOSE "Used to program specific performance monitoring events")
-
-check_library_exists(libpfm.a pfm_initialize "" HAVE_LIBPFM_INITIALIZE)
-if(HAVE_LIBPFM_INITIALIZE)
-  check_include_file(perfmon/perf_event.h HAVE_PERFMON_PERF_EVENT_H)
-  check_include_file(perfmon/pfmlib.h HAVE_PERFMON_PFMLIB_H)
-  check_include_file(perfmon/pfmlib_perf_event.h HAVE_PERFMON_PFMLIB_PERF_EVENT_H)
-  if(HAVE_PERFMON_PERF_EVENT_H AND HAVE_PERFMON_PFMLIB_H AND HAVE_PERFMON_PFMLIB_PERF_EVENT_H)
-    message("Using Perf Counters.")
-    set(HAVE_LIBPFM 1)
-    set(PFM_FOUND 1)
-  endif()
-else()
-  message("Perf Counters support requested, but was unable to find libpfm.")
-endif()
diff --git a/3rdparty/benchmark/cmake/benchmark.pc.in b/3rdparty/benchmark/cmake/benchmark.pc.in
deleted file mode 100644
index 34beb012..00000000
--- a/3rdparty/benchmark/cmake/benchmark.pc.in
+++ /dev/null
@@ -1,12 +0,0 @@
-prefix=@CMAKE_INSTALL_PREFIX@
-exec_prefix=${prefix}
-libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
-includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
-
-Name: @PROJECT_NAME@
-Description: Google microbenchmark framework
-Version: @VERSION@
-
-Libs: -L${libdir} -lbenchmark
-Libs.private: -lpthread
-Cflags: -I${includedir}
diff --git a/3rdparty/benchmark/cmake/gnu_posix_regex.cpp b/3rdparty/benchmark/cmake/gnu_posix_regex.cpp
deleted file mode 100644
index b5b91cda..00000000
--- a/3rdparty/benchmark/cmake/gnu_posix_regex.cpp
+++ /dev/null
@@ -1,12 +0,0 @@
-#include <gnuregex.h>
-#include <string>
-int main() {
-  std::string str = "test0159";
-  regex_t re;
-  int ec = regcomp(&re, "^[a-z]+[0-9]+$", REG_EXTENDED | REG_NOSUB);
-  if (ec != 0) {
-    return ec;
-  }
-  return regexec(&re, str.c_str(), 0, nullptr, 0) ? -1 : 0;
-}
-
diff --git a/3rdparty/benchmark/cmake/llvm-toolchain.cmake b/3rdparty/benchmark/cmake/llvm-toolchain.cmake
deleted file mode 100644
index fc119e52..00000000
--- a/3rdparty/benchmark/cmake/llvm-toolchain.cmake
+++ /dev/null
@@ -1,8 +0,0 @@
-find_package(LLVMAr REQUIRED)
-set(CMAKE_AR "${LLVMAR_EXECUTABLE}" CACHE FILEPATH "" FORCE)
-
-find_package(LLVMNm REQUIRED)
-set(CMAKE_NM "${LLVMNM_EXECUTABLE}" CACHE FILEPATH "" FORCE)
-
-find_package(LLVMRanLib REQUIRED)
-set(CMAKE_RANLIB "${LLVMRANLIB_EXECUTABLE}" CACHE FILEPATH "" FORCE)
diff --git a/3rdparty/benchmark/cmake/posix_regex.cpp b/3rdparty/benchmark/cmake/posix_regex.cpp
deleted file mode 100644
index 466dc625..00000000
--- a/3rdparty/benchmark/cmake/posix_regex.cpp
+++ /dev/null
@@ -1,14 +0,0 @@
-#include <regex.h>
-#include <string>
-int main() {
-  std::string str = "test0159";
-  regex_t re;
-  int ec = regcomp(&re, "^[a-z]+[0-9]+$", REG_EXTENDED | REG_NOSUB);
-  if (ec != 0) {
-    return ec;
-  }
-  int ret = regexec(&re, str.c_str(), 0, nullptr, 0) ? -1 : 0;
-  regfree(&re);
-  return ret;
-}
-
diff --git a/3rdparty/benchmark/cmake/split_list.cmake b/3rdparty/benchmark/cmake/split_list.cmake
deleted file mode 100644
index 67aed3fd..00000000
--- a/3rdparty/benchmark/cmake/split_list.cmake
+++ /dev/null
@@ -1,3 +0,0 @@
-macro(split_list listname)
-  string(REPLACE ";" " " ${listname} "${${listname}}")
-endmacro()
diff --git a/3rdparty/benchmark/cmake/std_regex.cpp b/3rdparty/benchmark/cmake/std_regex.cpp
deleted file mode 100644
index 696f2a26..00000000
--- a/3rdparty/benchmark/cmake/std_regex.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-#include <regex>
-#include <string>
-int main() {
-  const std::string str = "test0159";
-  std::regex re;
-  re = std::regex("^[a-z]+[0-9]+$",
-       std::regex_constants::extended | std::regex_constants::nosubs);
-  return std::regex_search(str, re) ? 0 : -1;
-}
-
diff --git a/3rdparty/benchmark/cmake/steady_clock.cpp b/3rdparty/benchmark/cmake/steady_clock.cpp
deleted file mode 100644
index 66d50d17..00000000
--- a/3rdparty/benchmark/cmake/steady_clock.cpp
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <chrono>
-
-int main() {
-    typedef std::chrono::steady_clock Clock;
-    Clock::time_point tp = Clock::now();
-    ((void)tp);
-}
diff --git a/3rdparty/benchmark/cmake/thread_safety_attributes.cpp b/3rdparty/benchmark/cmake/thread_safety_attributes.cpp
deleted file mode 100644
index 46161bab..00000000
--- a/3rdparty/benchmark/cmake/thread_safety_attributes.cpp
+++ /dev/null
@@ -1,4 +0,0 @@
-#define HAVE_THREAD_SAFETY_ATTRIBUTES
-#include "../src/mutex.h"
-
-int main() {}
diff --git a/3rdparty/benchmark/docs/AssemblyTests.md b/3rdparty/benchmark/docs/AssemblyTests.md
deleted file mode 100644
index 1fbdc269..00000000
--- a/3rdparty/benchmark/docs/AssemblyTests.md
+++ /dev/null
@@ -1,147 +0,0 @@
-# Assembly Tests
-
-The Benchmark library provides a number of functions whose primary
-purpose in to affect assembly generation, including `DoNotOptimize`
-and `ClobberMemory`. In addition there are other functions,
-such as `KeepRunning`, for which generating good assembly is paramount.
-
-For these functions it's important to have tests that verify the
-correctness and quality of the implementation. This requires testing
-the code generated by the compiler.
-
-This document describes how the Benchmark library tests compiler output,
-as well as how to properly write new tests.
-
-
-## Anatomy of a Test
-
-Writing a test has two steps:
-
-* Write the code you want to generate assembly for.
-* Add `// CHECK` lines to match against the verified assembly.
-
-Example:
-```c++
-
-// CHECK-LABEL: test_add:
-extern "C" int test_add() {
-    extern int ExternInt;
-    return ExternInt + 1;
-
-    // CHECK: movl ExternInt(%rip), %eax
-    // CHECK: addl %eax
-    // CHECK: ret
-}
-
-```
-
-#### LLVM Filecheck
-
-[LLVM's Filecheck](https://llvm.org/docs/CommandGuide/FileCheck.html)
-is used to test the generated assembly against the `// CHECK` lines
-specified in the tests source file. Please see the documentation
-linked above for information on how to write `CHECK` directives.
-
-#### Tips and Tricks:
-
-* Tests should match the minimal amount of output required to establish
-correctness. `CHECK` directives don't have to match on the exact next line
-after the previous match, so tests should omit checks for unimportant
-bits of assembly. ([`CHECK-NEXT`](https://llvm.org/docs/CommandGuide/FileCheck.html#the-check-next-directive)
-can be used to ensure a match occurs exactly after the previous match).
-
-* The tests are compiled with `-O3 -g0`. So we're only testing the
-optimized output.
-
-* The assembly output is further cleaned up using `tools/strip_asm.py`.
-This removes comments, assembler directives, and unused labels before
-the test is run.
-
-* The generated and stripped assembly file for a test is output under
-`<build-directory>/test/<test-name>.s`
-
-* Filecheck supports using [`CHECK` prefixes](https://llvm.org/docs/CommandGuide/FileCheck.html#cmdoption-check-prefixes)
-to specify lines that should only match in certain situations.
-The Benchmark tests use `CHECK-CLANG` and `CHECK-GNU` for lines that
-are only expected to match Clang or GCC's output respectively. Normal
-`CHECK` lines match against all compilers. (Note: `CHECK-NOT` and
-`CHECK-LABEL` are NOT prefixes. They are versions of non-prefixed
-`CHECK` lines)
-
-* Use `extern "C"` to disable name mangling for specific functions. This
-makes them easier to name in the `CHECK` lines.
-
-
-## Problems Writing Portable Tests
-
-Writing tests which check the code generated by a compiler are
-inherently non-portable. Different compilers and even different compiler
-versions may generate entirely different code. The Benchmark tests
-must tolerate this.
-
-LLVM Filecheck provides a number of mechanisms to help write
-"more portable" tests; including [matching using regular expressions](https://llvm.org/docs/CommandGuide/FileCheck.html#filecheck-pattern-matching-syntax),
-allowing the creation of [named variables](https://llvm.org/docs/CommandGuide/FileCheck.html#filecheck-variables)
-for later matching, and [checking non-sequential matches](https://llvm.org/docs/CommandGuide/FileCheck.html#the-check-dag-directive).
-
-#### Capturing Variables
-
-For example, say GCC stores a variable in a register but Clang stores
-it in memory. To write a test that tolerates both cases we "capture"
-the destination of the store, and then use the captured expression
-to write the remainder of the test.
-
-```c++
-// CHECK-LABEL: test_div_no_op_into_shr:
-extern "C" void test_div_no_op_into_shr(int value) {
-    int divisor = 2;
-    benchmark::DoNotOptimize(divisor); // hide the value from the optimizer
-    return value / divisor;
-
-    // CHECK: movl $2, [[DEST:.*]]
-    // CHECK: idivl [[DEST]]
-    // CHECK: ret
-}
-```
-
-#### Using Regular Expressions to Match Differing Output
-
-Often tests require testing assembly lines which may subtly differ
-between compilers or compiler versions. A common example of this
-is matching stack frame addresses. In this case regular expressions
-can be used to match the differing bits of output. For example:
-
-```c++
-int ExternInt;
-struct Point { int x, y, z; };
-
-// CHECK-LABEL: test_store_point:
-extern "C" void test_store_point() {
-    Point p{ExternInt, ExternInt, ExternInt};
-    benchmark::DoNotOptimize(p);
-
-    // CHECK: movl ExternInt(%rip), %eax
-    // CHECK: movl %eax, -{{[0-9]+}}(%rsp)
-    // CHECK: movl %eax, -{{[0-9]+}}(%rsp)
-    // CHECK: movl %eax, -{{[0-9]+}}(%rsp)
-    // CHECK: ret
-}
-```
-
-## Current Requirements and Limitations
-
-The tests require Filecheck to be installed along the `PATH` of the
-build machine. Otherwise the tests will be disabled.
-
-Additionally, as mentioned in the previous section, codegen tests are
-inherently non-portable. Currently the tests are limited to:
-
-* x86_64 targets.
-* Compiled with GCC or Clang
-
-Further work could be done, at least on a limited basis, to extend the
-tests to other architectures and compilers (using `CHECK` prefixes).
-
-Furthermore, the tests fail for builds which specify additional flags
-that modify code generation, including `--coverage` or `-fsanitize=`.
-
diff --git a/3rdparty/benchmark/docs/_config.yml b/3rdparty/benchmark/docs/_config.yml
deleted file mode 100644
index 2f7efbea..00000000
--- a/3rdparty/benchmark/docs/_config.yml
+++ /dev/null
@@ -1 +0,0 @@
-theme: jekyll-theme-minimal
\ No newline at end of file
diff --git a/3rdparty/benchmark/docs/dependencies.md b/3rdparty/benchmark/docs/dependencies.md
deleted file mode 100644
index 7af52b95..00000000
--- a/3rdparty/benchmark/docs/dependencies.md
+++ /dev/null
@@ -1,19 +0,0 @@
-# Build tool dependency policy
-
-To ensure the broadest compatibility when building the benchmark library, but
-still allow forward progress, we require any build tooling to be available for:
-
-* Debian stable _and_
-* The last two Ubuntu LTS releases
-
-Currently, this means using build tool versions that are available for Ubuntu
-18.04 (Bionic Beaver), Ubuntu 20.04 (Focal Fossa), and Debian 11 (bullseye).
-
-_Note, CI also runs ubuntu-16.04 and ubuntu-14.04 to ensure best effort support
-for older versions._
-
-## cmake
-The current supported version is cmake 3.5.1 as of 2018-06-06.
-
-_Note, this version is also available for Ubuntu 14.04, an older Ubuntu LTS
-release, as `cmake3`._
diff --git a/3rdparty/benchmark/docs/index.md b/3rdparty/benchmark/docs/index.md
deleted file mode 100644
index eb82eff9..00000000
--- a/3rdparty/benchmark/docs/index.md
+++ /dev/null
@@ -1,10 +0,0 @@
-# Benchmark
-
-* [Assembly Tests](AssemblyTests.md)
-* [Dependencies](dependencies.md)
-* [Perf Counters](perf_counters.md)
-* [Platform Specific Build Instructions](platform_specific_build_instructions.md)
-* [Random Interleaving](random_interleaving.md)
-* [Releasing](releasing.md)
-* [Tools](tools.md)
-* [User Guide](user_guide.md)
\ No newline at end of file
diff --git a/3rdparty/benchmark/docs/perf_counters.md b/3rdparty/benchmark/docs/perf_counters.md
deleted file mode 100644
index 74560e96..00000000
--- a/3rdparty/benchmark/docs/perf_counters.md
+++ /dev/null
@@ -1,34 +0,0 @@
-<a name="perf-counters" />
-
-# User-Requested Performance Counters
-
-When running benchmarks, the user may choose to request collection of
-performance counters. This may be useful in investigation scenarios - narrowing
-down the cause of a regression; or verifying that the underlying cause of a
-performance improvement matches expectations.
-
-This feature is available if:
-
-* The benchmark is run on an architecture featuring a Performance Monitoring
-  Unit (PMU),
-* The benchmark is compiled with support for collecting counters. Currently,
-  this requires [libpfm](http://perfmon2.sourceforge.net/) be available at build
-  time
-
-The feature does not require modifying benchmark code. Counter collection is
-handled at the boundaries where timer collection is also handled. 
-
-To opt-in:
-
-*  Install `libpfm4-dev`, e.g. `apt-get install libpfm4-dev`.
-*  Enable the cmake flag BENCHMARK_ENABLE_LIBPFM.
-
-To use, pass a comma-separated list of counter names through the
-`--benchmark_perf_counters` flag. The names are decoded through libpfm - meaning,
-they are platform specific, but some (e.g. `CYCLES` or `INSTRUCTIONS`) are
-mapped by libpfm to platform-specifics - see libpfm
-[documentation](http://perfmon2.sourceforge.net/docs.html) for more details.
-
-The counter values are reported back through the [User Counters](../README.md#custom-counters)
-mechanism, meaning, they are available in all the formats (e.g. JSON) supported
-by User Counters.
\ No newline at end of file
diff --git a/3rdparty/benchmark/docs/platform_specific_build_instructions.md b/3rdparty/benchmark/docs/platform_specific_build_instructions.md
deleted file mode 100644
index 2d5d6c47..00000000
--- a/3rdparty/benchmark/docs/platform_specific_build_instructions.md
+++ /dev/null
@@ -1,48 +0,0 @@
-# Platform Specific Build Instructions
-
-## Building with GCC
-
-When the library is built using GCC it is necessary to link with the pthread
-library due to how GCC implements `std::thread`. Failing to link to pthread will
-lead to runtime exceptions (unless you're using libc++), not linker errors. See
-[issue #67](https://github.com/google/benchmark/issues/67) for more details. You
-can link to pthread by adding `-pthread` to your linker command. Note, you can
-also use `-lpthread`, but there are potential issues with ordering of command
-line parameters if you use that.
-
-On QNX, the pthread library is part of libc and usually included automatically
-(see
-[`pthread_create()`](https://www.qnx.com/developers/docs/7.1/index.html#com.qnx.doc.neutrino.lib_ref/topic/p/pthread_create.html)).
-There's no separate pthread library to link.
-
-## Building with Visual Studio 2015 or 2017
-
-The `shlwapi` library (`-lshlwapi`) is required to support a call to `CPUInfo` which reads the registry. Either add `shlwapi.lib` under `[ Configuration Properties > Linker > Input ]`, or use the following:
-
-```
-// Alternatively, can add libraries using linker options.
-#ifdef _WIN32
-#pragma comment ( lib, "Shlwapi.lib" )
-#ifdef _DEBUG
-#pragma comment ( lib, "benchmarkd.lib" )
-#else
-#pragma comment ( lib, "benchmark.lib" )
-#endif
-#endif
-```
-
-Can also use the graphical version of CMake:
-* Open `CMake GUI`.
-* Under `Where to build the binaries`, same path as source plus `build`.
-* Under `CMAKE_INSTALL_PREFIX`, same path as source plus `install`.
-* Click `Configure`, `Generate`, `Open Project`.
-* If build fails, try deleting entire directory and starting again, or unticking options to build less.
-
-## Building with Intel 2015 Update 1 or Intel System Studio Update 4
-
-See instructions for building with Visual Studio. Once built, right click on the solution and change the build to Intel.
-
-## Building on Solaris
-
-If you're running benchmarks on solaris, you'll want the kstat library linked in
-too (`-lkstat`).
\ No newline at end of file
diff --git a/3rdparty/benchmark/docs/random_interleaving.md b/3rdparty/benchmark/docs/random_interleaving.md
deleted file mode 100644
index c0830368..00000000
--- a/3rdparty/benchmark/docs/random_interleaving.md
+++ /dev/null
@@ -1,13 +0,0 @@
-<a name="interleaving" />
-
-# Random Interleaving
-
-[Random Interleaving](https://github.com/google/benchmark/issues/1051) is a
-technique to lower run-to-run variance. It randomly interleaves repetitions of a
-microbenchmark with repetitions from other microbenchmarks in the same benchmark
-test. Data shows it is able to lower run-to-run variance by
-[40%](https://github.com/google/benchmark/issues/1051) on average.
-
-To use, you mainly need to set `--benchmark_enable_random_interleaving=true`,
-and optionally specify non-zero repetition count `--benchmark_repetitions=9`
-and optionally decrease the per-repetition time `--benchmark_min_time=0.1`.
diff --git a/3rdparty/benchmark/docs/releasing.md b/3rdparty/benchmark/docs/releasing.md
deleted file mode 100644
index 334f9353..00000000
--- a/3rdparty/benchmark/docs/releasing.md
+++ /dev/null
@@ -1,35 +0,0 @@
-# How to release
-
-* Make sure you're on main and synced to HEAD
-* Ensure the project builds and tests run (sanity check only, obviously)
-    * `parallel -j0 exec ::: test/*_test` can help ensure everything at least
-      passes
-* Prepare release notes
-    * `git log $(git describe --abbrev=0 --tags)..HEAD` gives you the list of
-      commits between the last annotated tag and HEAD
-    * Pick the most interesting.
-* Create one last commit that updates the version saved in `CMakeLists.txt` and the
-  `__version__` variable in `bindings/python/google_benchmark/__init__.py`to the release
-  version you're creating. (This version will be used if benchmark is installed from the
-  archive you'll be creating in the next step.)
-
-```
-project (benchmark VERSION 1.6.0 LANGUAGES CXX)
-```
-
-```python
-# bindings/python/google_benchmark/__init__.py
-
-# ...
-
-__version__ = "1.6.0"  # <-- change this to the release version you are creating
-
-# ...
-```
-
-* Create a release through github's interface
-    * Note this will create a lightweight tag.
-    * Update this to an annotated tag:
-      * `git pull --tags`
-      * `git tag -a -f <tag> <tag>`
-      * `git push --force --tags origin`
diff --git a/3rdparty/benchmark/docs/tools.md b/3rdparty/benchmark/docs/tools.md
deleted file mode 100644
index f2d0c497..00000000
--- a/3rdparty/benchmark/docs/tools.md
+++ /dev/null
@@ -1,203 +0,0 @@
-# Benchmark Tools
-
-## compare.py
-
-The `compare.py` can be used to compare the result of benchmarks.
-
-### Dependencies
-The utility relies on the [scipy](https://www.scipy.org) package which can be installed using pip:
-```bash
-pip3 install -r requirements.txt
-```
-
-### Displaying aggregates only
-
-The switch `-a` / `--display_aggregates_only` can be used to control the
-displayment of the normal iterations vs the aggregates. When passed, it will
-be passthrough to the benchmark binaries to be run, and will be accounted for
-in the tool itself; only the aggregates will be displayed, but not normal runs.
-It only affects the display, the separate runs will still be used to calculate
-the U test.
-
-### Modes of operation
-
-There are three modes of operation:
-
-1. Just compare two benchmarks
-The program is invoked like:
-
-``` bash
-$ compare.py benchmarks <benchmark_baseline> <benchmark_contender> [benchmark options]...
-```
-Where `<benchmark_baseline>` and `<benchmark_contender>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
-
-`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
-
-Example output:
-```
-$ ./compare.py benchmarks ./a.out ./a.out
-RUNNING: ./a.out --benchmark_out=/tmp/tmprBT5nW
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:16:44
-------------------------------------------------------
-Benchmark               Time           CPU Iterations
-------------------------------------------------------
-BM_memcpy/8            36 ns         36 ns   19101577   211.669MB/s
-BM_memcpy/64           76 ns         76 ns    9412571   800.199MB/s
-BM_memcpy/512          84 ns         84 ns    8249070   5.64771GB/s
-BM_memcpy/1024        116 ns        116 ns    6181763   8.19505GB/s
-BM_memcpy/8192        643 ns        643 ns    1062855   11.8636GB/s
-BM_copy/8             222 ns        222 ns    3137987   34.3772MB/s
-BM_copy/64           1608 ns       1608 ns     432758   37.9501MB/s
-BM_copy/512         12589 ns      12589 ns      54806   38.7867MB/s
-BM_copy/1024        25169 ns      25169 ns      27713   38.8003MB/s
-BM_copy/8192       201165 ns     201112 ns       3486   38.8466MB/s
-RUNNING: ./a.out --benchmark_out=/tmp/tmpt1wwG_
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:16:53
-------------------------------------------------------
-Benchmark               Time           CPU Iterations
-------------------------------------------------------
-BM_memcpy/8            36 ns         36 ns   19397903   211.255MB/s
-BM_memcpy/64           73 ns         73 ns    9691174   839.635MB/s
-BM_memcpy/512          85 ns         85 ns    8312329   5.60101GB/s
-BM_memcpy/1024        118 ns        118 ns    6438774   8.11608GB/s
-BM_memcpy/8192        656 ns        656 ns    1068644   11.6277GB/s
-BM_copy/8             223 ns        223 ns    3146977   34.2338MB/s
-BM_copy/64           1611 ns       1611 ns     435340   37.8751MB/s
-BM_copy/512         12622 ns      12622 ns      54818   38.6844MB/s
-BM_copy/1024        25257 ns      25239 ns      27779   38.6927MB/s
-BM_copy/8192       205013 ns     205010 ns       3479    38.108MB/s
-Comparing ./a.out to ./a.out
-Benchmark                 Time             CPU      Time Old      Time New       CPU Old       CPU New
-------------------------------------------------------------------------------------------------------
-BM_memcpy/8            +0.0020         +0.0020            36            36            36            36
-BM_memcpy/64           -0.0468         -0.0470            76            73            76            73
-BM_memcpy/512          +0.0081         +0.0083            84            85            84            85
-BM_memcpy/1024         +0.0098         +0.0097           116           118           116           118
-BM_memcpy/8192         +0.0200         +0.0203           643           656           643           656
-BM_copy/8              +0.0046         +0.0042           222           223           222           223
-BM_copy/64             +0.0020         +0.0020          1608          1611          1608          1611
-BM_copy/512            +0.0027         +0.0026         12589         12622         12589         12622
-BM_copy/1024           +0.0035         +0.0028         25169         25257         25169         25239
-BM_copy/8192           +0.0191         +0.0194        201165        205013        201112        205010
-```
-
-What it does is for the every benchmark from the first run it looks for the benchmark with exactly the same name in the second run, and then compares the results. If the names differ, the benchmark is omitted from the diff.
-As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
-
-2. Compare two different filters of one benchmark
-The program is invoked like:
-
-``` bash
-$ compare.py filters <benchmark> <filter_baseline> <filter_contender> [benchmark options]...
-```
-Where `<benchmark>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
-
-Where `<filter_baseline>` and `<filter_contender>` are the same regex filters that you would pass to the `[--benchmark_filter=<regex>]` parameter of the benchmark binary.
-
-`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
-
-Example output:
-```
-$ ./compare.py filters ./a.out BM_memcpy BM_copy
-RUNNING: ./a.out --benchmark_filter=BM_memcpy --benchmark_out=/tmp/tmpBWKk0k
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:37:28
-------------------------------------------------------
-Benchmark               Time           CPU Iterations
-------------------------------------------------------
-BM_memcpy/8            36 ns         36 ns   17891491   211.215MB/s
-BM_memcpy/64           74 ns         74 ns    9400999   825.646MB/s
-BM_memcpy/512          87 ns         87 ns    8027453   5.46126GB/s
-BM_memcpy/1024        111 ns        111 ns    6116853    8.5648GB/s
-BM_memcpy/8192        657 ns        656 ns    1064679   11.6247GB/s
-RUNNING: ./a.out --benchmark_filter=BM_copy --benchmark_out=/tmp/tmpAvWcOM
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:37:33
-----------------------------------------------------
-Benchmark             Time           CPU Iterations
-----------------------------------------------------
-BM_copy/8           227 ns        227 ns    3038700   33.6264MB/s
-BM_copy/64         1640 ns       1640 ns     426893   37.2154MB/s
-BM_copy/512       12804 ns      12801 ns      55417   38.1444MB/s
-BM_copy/1024      25409 ns      25407 ns      27516   38.4365MB/s
-BM_copy/8192     202986 ns     202990 ns       3454   38.4871MB/s
-Comparing BM_memcpy to BM_copy (from ./a.out)
-Benchmark                               Time             CPU      Time Old      Time New       CPU Old       CPU New
---------------------------------------------------------------------------------------------------------------------
-[BM_memcpy vs. BM_copy]/8            +5.2829         +5.2812            36           227            36           227
-[BM_memcpy vs. BM_copy]/64          +21.1719        +21.1856            74          1640            74          1640
-[BM_memcpy vs. BM_copy]/512        +145.6487       +145.6097            87         12804            87         12801
-[BM_memcpy vs. BM_copy]/1024       +227.1860       +227.1776           111         25409           111         25407
-[BM_memcpy vs. BM_copy]/8192       +308.1664       +308.2898           657        202986           656        202990
-```
-
-As you can see, it applies filter to the benchmarks, both when running the benchmark, and before doing the diff. And to make the diff work, the matches are replaced with some common string. Thus, you can compare two different benchmark families within one benchmark binary.
-As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
-
-3. Compare filter one from benchmark one to filter two from benchmark two:
-The program is invoked like:
-
-``` bash
-$ compare.py filters <benchmark_baseline> <filter_baseline> <benchmark_contender> <filter_contender> [benchmark options]...
-```
-
-Where `<benchmark_baseline>` and `<benchmark_contender>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
-
-Where `<filter_baseline>` and `<filter_contender>` are the same regex filters that you would pass to the `[--benchmark_filter=<regex>]` parameter of the benchmark binary.
-
-`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
-
-Example output:
-```
-$ ./compare.py benchmarksfiltered ./a.out BM_memcpy ./a.out BM_copy
-RUNNING: ./a.out --benchmark_filter=BM_memcpy --benchmark_out=/tmp/tmp_FvbYg
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:38:27
-------------------------------------------------------
-Benchmark               Time           CPU Iterations
-------------------------------------------------------
-BM_memcpy/8            37 ns         37 ns   18953482   204.118MB/s
-BM_memcpy/64           74 ns         74 ns    9206578   828.245MB/s
-BM_memcpy/512          91 ns         91 ns    8086195   5.25476GB/s
-BM_memcpy/1024        120 ns        120 ns    5804513   7.95662GB/s
-BM_memcpy/8192        664 ns        664 ns    1028363   11.4948GB/s
-RUNNING: ./a.out --benchmark_filter=BM_copy --benchmark_out=/tmp/tmpDfL5iE
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:38:32
-----------------------------------------------------
-Benchmark             Time           CPU Iterations
-----------------------------------------------------
-BM_copy/8           230 ns        230 ns    2985909   33.1161MB/s
-BM_copy/64         1654 ns       1653 ns     419408   36.9137MB/s
-BM_copy/512       13122 ns      13120 ns      53403   37.2156MB/s
-BM_copy/1024      26679 ns      26666 ns      26575   36.6218MB/s
-BM_copy/8192     215068 ns     215053 ns       3221   36.3283MB/s
-Comparing BM_memcpy (from ./a.out) to BM_copy (from ./a.out)
-Benchmark                               Time             CPU      Time Old      Time New       CPU Old       CPU New
---------------------------------------------------------------------------------------------------------------------
-[BM_memcpy vs. BM_copy]/8            +5.1649         +5.1637            37           230            37           230
-[BM_memcpy vs. BM_copy]/64          +21.4352        +21.4374            74          1654            74          1653
-[BM_memcpy vs. BM_copy]/512        +143.6022       +143.5865            91         13122            91         13120
-[BM_memcpy vs. BM_copy]/1024       +221.5903       +221.4790           120         26679           120         26666
-[BM_memcpy vs. BM_copy]/8192       +322.9059       +323.0096           664        215068           664        215053
-```
-This is a mix of the previous two modes, two (potentially different) benchmark binaries are run, and a different filter is applied to each one.
-As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
-
-### U test
-
-If there is a sufficient repetition count of the benchmarks, the tool can do
-a [U Test](https://en.wikipedia.org/wiki/Mann%E2%80%93Whitney_U_test), of the
-null hypothesis that it is equally likely that a randomly selected value from
-one sample will be less than or greater than a randomly selected value from a
-second sample.
-
-If the calculated p-value is below this value is lower than the significance
-level alpha, then the result is said to be statistically significant and the
-null hypothesis is rejected. Which in other words means that the two benchmarks
-aren't identical.
-
-**WARNING**: requires **LARGE** (no less than 9) number of repetitions to be
-meaningful!
diff --git a/3rdparty/benchmark/docs/user_guide.md b/3rdparty/benchmark/docs/user_guide.md
deleted file mode 100644
index 34bea690..00000000
--- a/3rdparty/benchmark/docs/user_guide.md
+++ /dev/null
@@ -1,1200 +0,0 @@
-# User Guide
-
-## Command Line
-
-[Output Formats](#output-formats)
-
-[Output Files](#output-files)
-
-[Running Benchmarks](#running-benchmarks)
-
-[Running a Subset of Benchmarks](#running-a-subset-of-benchmarks)
-
-[Result Comparison](#result-comparison)
-
-[Extra Context](#extra-context)
-
-## Library
-
-[Runtime and Reporting Considerations](#runtime-and-reporting-considerations)
-
-[Setup/Teardown](#setupteardown)
-
-[Passing Arguments](#passing-arguments)
-
-[Custom Benchmark Name](#custom-benchmark-name)
-
-[Calculating Asymptotic Complexity](#asymptotic-complexity)
-
-[Templated Benchmarks](#templated-benchmarks)
-
-[Fixtures](#fixtures)
-
-[Custom Counters](#custom-counters)
-
-[Multithreaded Benchmarks](#multithreaded-benchmarks)
-
-[CPU Timers](#cpu-timers)
-
-[Manual Timing](#manual-timing)
-
-[Setting the Time Unit](#setting-the-time-unit)
-
-[Random Interleaving](random_interleaving.md)
-
-[User-Requested Performance Counters](perf_counters.md)
-
-[Preventing Optimization](#preventing-optimization)
-
-[Reporting Statistics](#reporting-statistics)
-
-[Custom Statistics](#custom-statistics)
-
-[Using RegisterBenchmark](#using-register-benchmark)
-
-[Exiting with an Error](#exiting-with-an-error)
-
-[A Faster KeepRunning Loop](#a-faster-keep-running-loop)
-
-[Disabling CPU Frequency Scaling](#disabling-cpu-frequency-scaling)
-
-
-<a name="output-formats" />
-
-## Output Formats
-
-The library supports multiple output formats. Use the
-`--benchmark_format=<console|json|csv>` flag (or set the
-`BENCHMARK_FORMAT=<console|json|csv>` environment variable) to set
-the format type. `console` is the default format.
-
-The Console format is intended to be a human readable format. By default
-the format generates color output. Context is output on stderr and the
-tabular data on stdout. Example tabular output looks like:
-
-```
-Benchmark                               Time(ns)    CPU(ns) Iterations
-----------------------------------------------------------------------
-BM_SetInsert/1024/1                        28928      29349      23853  133.097kB/s   33.2742k items/s
-BM_SetInsert/1024/8                        32065      32913      21375  949.487kB/s   237.372k items/s
-BM_SetInsert/1024/10                       33157      33648      21431  1.13369MB/s   290.225k items/s
-```
-
-The JSON format outputs human readable json split into two top level attributes.
-The `context` attribute contains information about the run in general, including
-information about the CPU and the date.
-The `benchmarks` attribute contains a list of every benchmark run. Example json
-output looks like:
-
-```json
-{
-  "context": {
-    "date": "2015/03/17-18:40:25",
-    "num_cpus": 40,
-    "mhz_per_cpu": 2801,
-    "cpu_scaling_enabled": false,
-    "build_type": "debug"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_SetInsert/1024/1",
-      "iterations": 94877,
-      "real_time": 29275,
-      "cpu_time": 29836,
-      "bytes_per_second": 134066,
-      "items_per_second": 33516
-    },
-    {
-      "name": "BM_SetInsert/1024/8",
-      "iterations": 21609,
-      "real_time": 32317,
-      "cpu_time": 32429,
-      "bytes_per_second": 986770,
-      "items_per_second": 246693
-    },
-    {
-      "name": "BM_SetInsert/1024/10",
-      "iterations": 21393,
-      "real_time": 32724,
-      "cpu_time": 33355,
-      "bytes_per_second": 1199226,
-      "items_per_second": 299807
-    }
-  ]
-}
-```
-
-The CSV format outputs comma-separated values. The `context` is output on stderr
-and the CSV itself on stdout. Example CSV output looks like:
-
-```
-name,iterations,real_time,cpu_time,bytes_per_second,items_per_second,label
-"BM_SetInsert/1024/1",65465,17890.7,8407.45,475768,118942,
-"BM_SetInsert/1024/8",116606,18810.1,9766.64,3.27646e+06,819115,
-"BM_SetInsert/1024/10",106365,17238.4,8421.53,4.74973e+06,1.18743e+06,
-```
-
-<a name="output-files" />
-
-## Output Files
-
-Write benchmark results to a file with the `--benchmark_out=<filename>` option
-(or set `BENCHMARK_OUT`). Specify the output format with
-`--benchmark_out_format={json|console|csv}` (or set
-`BENCHMARK_OUT_FORMAT={json|console|csv}`). Note that the 'csv' reporter is
-deprecated and the saved `.csv` file
-[is not parsable](https://github.com/google/benchmark/issues/794) by csv
-parsers.
-
-Specifying `--benchmark_out` does not suppress the console output.
-
-<a name="running-benchmarks" />
-
-## Running Benchmarks
-
-Benchmarks are executed by running the produced binaries. Benchmarks binaries,
-by default, accept options that may be specified either through their command
-line interface or by setting environment variables before execution. For every
-`--option_flag=<value>` CLI switch, a corresponding environment variable
-`OPTION_FLAG=<value>` exist and is used as default if set (CLI switches always
- prevails). A complete list of CLI options is available running benchmarks
- with the `--help` switch.
-
-<a name="running-a-subset-of-benchmarks" />
-
-## Running a Subset of Benchmarks
-
-The `--benchmark_filter=<regex>` option (or `BENCHMARK_FILTER=<regex>`
-environment variable) can be used to only run the benchmarks that match
-the specified `<regex>`. For example:
-
-```bash
-$ ./run_benchmarks.x --benchmark_filter=BM_memcpy/32
-Run on (1 X 2300 MHz CPU )
-2016-06-25 19:34:24
-Benchmark              Time           CPU Iterations
-----------------------------------------------------
-BM_memcpy/32          11 ns         11 ns   79545455
-BM_memcpy/32k       2181 ns       2185 ns     324074
-BM_memcpy/32          12 ns         12 ns   54687500
-BM_memcpy/32k       1834 ns       1837 ns     357143
-```
-
-<a name="result-comparison" />
-
-## Result comparison
-
-It is possible to compare the benchmarking results.
-See [Additional Tooling Documentation](tools.md)
-
-<a name="extra-context" />
-
-## Extra Context
-
-Sometimes it's useful to add extra context to the content printed before the
-results. By default this section includes information about the CPU on which
-the benchmarks are running. If you do want to add more context, you can use
-the `benchmark_context` command line flag:
-
-```bash
-$ ./run_benchmarks --benchmark_context=pwd=`pwd`
-Run on (1 x 2300 MHz CPU)
-pwd: /home/user/benchmark/
-Benchmark              Time           CPU Iterations
-----------------------------------------------------
-BM_memcpy/32          11 ns         11 ns   79545455
-BM_memcpy/32k       2181 ns       2185 ns     324074
-```
-
-You can get the same effect with the API:
-
-```c++
-  benchmark::AddCustomContext("foo", "bar");
-```
-
-Note that attempts to add a second value with the same key will fail with an
-error message.
-
-<a name="runtime-and-reporting-considerations" />
-
-## Runtime and Reporting Considerations
-
-When the benchmark binary is executed, each benchmark function is run serially.
-The number of iterations to run is determined dynamically by running the
-benchmark a few times and measuring the time taken and ensuring that the
-ultimate result will be statistically stable. As such, faster benchmark
-functions will be run for more iterations than slower benchmark functions, and
-the number of iterations is thus reported.
-
-In all cases, the number of iterations for which the benchmark is run is
-governed by the amount of time the benchmark takes. Concretely, the number of
-iterations is at least one, not more than 1e9, until CPU time is greater than
-the minimum time, or the wallclock time is 5x minimum time. The minimum time is
-set per benchmark by calling `MinTime` on the registered benchmark object.
-
-Average timings are then reported over the iterations run. If multiple
-repetitions are requested using the `--benchmark_repetitions` command-line
-option, or at registration time, the benchmark function will be run several
-times and statistical results across these repetitions will also be reported.
-
-As well as the per-benchmark entries, a preamble in the report will include
-information about the machine on which the benchmarks are run.
-
-<a name="setup-teardown" />
-
-## Setup/Teardown
-
-Global setup/teardown specific to each benchmark can be done by
-passing a callback to Setup/Teardown:
-
-The setup/teardown callbacks will be invoked once for each benchmark.
-If the benchmark is multi-threaded (will run in k threads), they will be invoked exactly once before
-each run with k threads.
-If the benchmark uses different size groups of threads, the above will be true for each size group.
-
-Eg.,
-
-```c++
-static void DoSetup(const benchmark::State& state) {
-}
-
-static void DoTeardown(const benchmark::State& state) {
-}
-
-static void BM_func(benchmark::State& state) {...}
-
-BENCHMARK(BM_func)->Arg(1)->Arg(3)->Threads(16)->Threads(32)->Setup(DoSetup)->Teardown(DoTeardown);
-
-```
-
-In this example, `DoSetup` and `DoTearDown` will be invoked 4 times each,
-specifically, once for each of this family:
- - BM_func_Arg_1_Threads_16, BM_func_Arg_1_Threads_32
- - BM_func_Arg_3_Threads_16, BM_func_Arg_3_Threads_32
-
-<a name="passing-arguments" />
-
-## Passing Arguments
-
-Sometimes a family of benchmarks can be implemented with just one routine that
-takes an extra argument to specify which one of the family of benchmarks to
-run. For example, the following code defines a family of benchmarks for
-measuring the speed of `memcpy()` calls of different lengths:
-
-```c++
-static void BM_memcpy(benchmark::State& state) {
-  char* src = new char[state.range(0)];
-  char* dst = new char[state.range(0)];
-  memset(src, 'x', state.range(0));
-  for (auto _ : state)
-    memcpy(dst, src, state.range(0));
-  state.SetBytesProcessed(int64_t(state.iterations()) *
-                          int64_t(state.range(0)));
-  delete[] src;
-  delete[] dst;
-}
-BENCHMARK(BM_memcpy)->Arg(8)->Arg(64)->Arg(512)->Arg(1<<10)->Arg(8<<10);
-```
-
-The preceding code is quite repetitive, and can be replaced with the following
-short-hand. The following invocation will pick a few appropriate arguments in
-the specified range and will generate a benchmark for each such argument.
-
-```c++
-BENCHMARK(BM_memcpy)->Range(8, 8<<10);
-```
-
-By default the arguments in the range are generated in multiples of eight and
-the command above selects [ 8, 64, 512, 4k, 8k ]. In the following code the
-range multiplier is changed to multiples of two.
-
-```c++
-BENCHMARK(BM_memcpy)->RangeMultiplier(2)->Range(8, 8<<10);
-```
-
-Now arguments generated are [ 8, 16, 32, 64, 128, 256, 512, 1024, 2k, 4k, 8k ].
-
-The preceding code shows a method of defining a sparse range.  The following
-example shows a method of defining a dense range. It is then used to benchmark
-the performance of `std::vector` initialization for uniformly increasing sizes.
-
-```c++
-static void BM_DenseRange(benchmark::State& state) {
-  for(auto _ : state) {
-    std::vector<int> v(state.range(0), state.range(0));
-    benchmark::DoNotOptimize(v.data());
-    benchmark::ClobberMemory();
-  }
-}
-BENCHMARK(BM_DenseRange)->DenseRange(0, 1024, 128);
-```
-
-Now arguments generated are [ 0, 128, 256, 384, 512, 640, 768, 896, 1024 ].
-
-You might have a benchmark that depends on two or more inputs. For example, the
-following code defines a family of benchmarks for measuring the speed of set
-insertion.
-
-```c++
-static void BM_SetInsert(benchmark::State& state) {
-  std::set<int> data;
-  for (auto _ : state) {
-    state.PauseTiming();
-    data = ConstructRandomSet(state.range(0));
-    state.ResumeTiming();
-    for (int j = 0; j < state.range(1); ++j)
-      data.insert(RandomNumber());
-  }
-}
-BENCHMARK(BM_SetInsert)
-    ->Args({1<<10, 128})
-    ->Args({2<<10, 128})
-    ->Args({4<<10, 128})
-    ->Args({8<<10, 128})
-    ->Args({1<<10, 512})
-    ->Args({2<<10, 512})
-    ->Args({4<<10, 512})
-    ->Args({8<<10, 512});
-```
-
-The preceding code is quite repetitive, and can be replaced with the following
-short-hand. The following macro will pick a few appropriate arguments in the
-product of the two specified ranges and will generate a benchmark for each such
-pair.
-
-{% raw %}
-```c++
-BENCHMARK(BM_SetInsert)->Ranges({{1<<10, 8<<10}, {128, 512}});
-```
-{% endraw %}
-
-Some benchmarks may require specific argument values that cannot be expressed
-with `Ranges`. In this case, `ArgsProduct` offers the ability to generate a
-benchmark input for each combination in the product of the supplied vectors.
-
-{% raw %}
-```c++
-BENCHMARK(BM_SetInsert)
-    ->ArgsProduct({{1<<10, 3<<10, 8<<10}, {20, 40, 60, 80}})
-// would generate the same benchmark arguments as
-BENCHMARK(BM_SetInsert)
-    ->Args({1<<10, 20})
-    ->Args({3<<10, 20})
-    ->Args({8<<10, 20})
-    ->Args({3<<10, 40})
-    ->Args({8<<10, 40})
-    ->Args({1<<10, 40})
-    ->Args({1<<10, 60})
-    ->Args({3<<10, 60})
-    ->Args({8<<10, 60})
-    ->Args({1<<10, 80})
-    ->Args({3<<10, 80})
-    ->Args({8<<10, 80});
-```
-{% endraw %}
-
-For the most common scenarios, helper methods for creating a list of
-integers for a given sparse or dense range are provided.
-
-```c++
-BENCHMARK(BM_SetInsert)
-    ->ArgsProduct({
-      benchmark::CreateRange(8, 128, /*multi=*/2),
-      benchmark::CreateDenseRange(1, 4, /*step=*/1)
-    })
-// would generate the same benchmark arguments as
-BENCHMARK(BM_SetInsert)
-    ->ArgsProduct({
-      {8, 16, 32, 64, 128},
-      {1, 2, 3, 4}
-    });
-```
-
-For more complex patterns of inputs, passing a custom function to `Apply` allows
-programmatic specification of an arbitrary set of arguments on which to run the
-benchmark. The following example enumerates a dense range on one parameter,
-and a sparse range on the second.
-
-```c++
-static void CustomArguments(benchmark::internal::Benchmark* b) {
-  for (int i = 0; i <= 10; ++i)
-    for (int j = 32; j <= 1024*1024; j *= 8)
-      b->Args({i, j});
-}
-BENCHMARK(BM_SetInsert)->Apply(CustomArguments);
-```
-
-### Passing Arbitrary Arguments to a Benchmark
-
-In C++11 it is possible to define a benchmark that takes an arbitrary number
-of extra arguments. The `BENCHMARK_CAPTURE(func, test_case_name, ...args)`
-macro creates a benchmark that invokes `func`  with the `benchmark::State` as
-the first argument followed by the specified `args...`.
-The `test_case_name` is appended to the name of the benchmark and
-should describe the values passed.
-
-```c++
-template <class ...ExtraArgs>
-void BM_takes_args(benchmark::State& state, ExtraArgs&&... extra_args) {
-  [...]
-}
-// Registers a benchmark named "BM_takes_args/int_string_test" that passes
-// the specified values to `extra_args`.
-BENCHMARK_CAPTURE(BM_takes_args, int_string_test, 42, std::string("abc"));
-```
-
-Note that elements of `...args` may refer to global variables. Users should
-avoid modifying global state inside of a benchmark.
-
-<a name="asymptotic-complexity" />
-
-## Calculating Asymptotic Complexity (Big O)
-
-Asymptotic complexity might be calculated for a family of benchmarks. The
-following code will calculate the coefficient for the high-order term in the
-running time and the normalized root-mean square error of string comparison.
-
-```c++
-static void BM_StringCompare(benchmark::State& state) {
-  std::string s1(state.range(0), '-');
-  std::string s2(state.range(0), '-');
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(s1.compare(s2));
-  }
-  state.SetComplexityN(state.range(0));
-}
-BENCHMARK(BM_StringCompare)
-    ->RangeMultiplier(2)->Range(1<<10, 1<<18)->Complexity(benchmark::oN);
-```
-
-As shown in the following invocation, asymptotic complexity might also be
-calculated automatically.
-
-```c++
-BENCHMARK(BM_StringCompare)
-    ->RangeMultiplier(2)->Range(1<<10, 1<<18)->Complexity();
-```
-
-The following code will specify asymptotic complexity with a lambda function,
-that might be used to customize high-order term calculation.
-
-```c++
-BENCHMARK(BM_StringCompare)->RangeMultiplier(2)
-    ->Range(1<<10, 1<<18)->Complexity([](benchmark::IterationCount n)->double{return n; });
-```
-
-<a name="custom-benchmark-name" />
-
-## Custom Benchmark Name
-
-You can change the benchmark's name as follows:
-
-```c++
-BENCHMARK(BM_memcpy)->Name("memcpy")->RangeMultiplier(2)->Range(8, 8<<10);
-```
-
-The invocation will execute the benchmark as before using `BM_memcpy` but changes
-the prefix in the report to `memcpy`.
-
-<a name="templated-benchmarks" />
-
-## Templated Benchmarks
-
-This example produces and consumes messages of size `sizeof(v)` `range_x`
-times. It also outputs throughput in the absence of multiprogramming.
-
-```c++
-template <class Q> void BM_Sequential(benchmark::State& state) {
-  Q q;
-  typename Q::value_type v;
-  for (auto _ : state) {
-    for (int i = state.range(0); i--; )
-      q.push(v);
-    for (int e = state.range(0); e--; )
-      q.Wait(&v);
-  }
-  // actually messages, not bytes:
-  state.SetBytesProcessed(
-      static_cast<int64_t>(state.iterations())*state.range(0));
-}
-// C++03
-BENCHMARK_TEMPLATE(BM_Sequential, WaitQueue<int>)->Range(1<<0, 1<<10);
-
-// C++11 or newer, you can use the BENCHMARK macro with template parameters:
-BENCHMARK(BM_Sequential<WaitQueue<int>>)->Range(1<<0, 1<<10);
-
-```
-
-Three macros are provided for adding benchmark templates.
-
-```c++
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK(func<...>) // Takes any number of parameters.
-#else // C++ < C++11
-#define BENCHMARK_TEMPLATE(func, arg1)
-#endif
-#define BENCHMARK_TEMPLATE1(func, arg1)
-#define BENCHMARK_TEMPLATE2(func, arg1, arg2)
-```
-
-<a name="fixtures" />
-
-## Fixtures
-
-Fixture tests are created by first defining a type that derives from
-`::benchmark::Fixture` and then creating/registering the tests using the
-following macros:
-
-* `BENCHMARK_F(ClassName, Method)`
-* `BENCHMARK_DEFINE_F(ClassName, Method)`
-* `BENCHMARK_REGISTER_F(ClassName, Method)`
-
-For Example:
-
-```c++
-class MyFixture : public benchmark::Fixture {
-public:
-  void SetUp(const ::benchmark::State& state) {
-  }
-
-  void TearDown(const ::benchmark::State& state) {
-  }
-};
-
-BENCHMARK_F(MyFixture, FooTest)(benchmark::State& st) {
-   for (auto _ : st) {
-     ...
-  }
-}
-
-BENCHMARK_DEFINE_F(MyFixture, BarTest)(benchmark::State& st) {
-   for (auto _ : st) {
-     ...
-  }
-}
-/* BarTest is NOT registered */
-BENCHMARK_REGISTER_F(MyFixture, BarTest)->Threads(2);
-/* BarTest is now registered */
-```
-
-### Templated Fixtures
-
-Also you can create templated fixture by using the following macros:
-
-* `BENCHMARK_TEMPLATE_F(ClassName, Method, ...)`
-* `BENCHMARK_TEMPLATE_DEFINE_F(ClassName, Method, ...)`
-
-For example:
-
-```c++
-template<typename T>
-class MyFixture : public benchmark::Fixture {};
-
-BENCHMARK_TEMPLATE_F(MyFixture, IntTest, int)(benchmark::State& st) {
-   for (auto _ : st) {
-     ...
-  }
-}
-
-BENCHMARK_TEMPLATE_DEFINE_F(MyFixture, DoubleTest, double)(benchmark::State& st) {
-   for (auto _ : st) {
-     ...
-  }
-}
-
-BENCHMARK_REGISTER_F(MyFixture, DoubleTest)->Threads(2);
-```
-
-<a name="custom-counters" />
-
-## Custom Counters
-
-You can add your own counters with user-defined names. The example below
-will add columns "Foo", "Bar" and "Baz" in its output:
-
-```c++
-static void UserCountersExample1(benchmark::State& state) {
-  double numFoos = 0, numBars = 0, numBazs = 0;
-  for (auto _ : state) {
-    // ... count Foo,Bar,Baz events
-  }
-  state.counters["Foo"] = numFoos;
-  state.counters["Bar"] = numBars;
-  state.counters["Baz"] = numBazs;
-}
-```
-
-The `state.counters` object is a `std::map` with `std::string` keys
-and `Counter` values. The latter is a `double`-like class, via an implicit
-conversion to `double&`. Thus you can use all of the standard arithmetic
-assignment operators (`=,+=,-=,*=,/=`) to change the value of each counter.
-
-In multithreaded benchmarks, each counter is set on the calling thread only.
-When the benchmark finishes, the counters from each thread will be summed;
-the resulting sum is the value which will be shown for the benchmark.
-
-The `Counter` constructor accepts three parameters: the value as a `double`
-; a bit flag which allows you to show counters as rates, and/or as per-thread
-iteration, and/or as per-thread averages, and/or iteration invariants,
-and/or finally inverting the result; and a flag specifying the 'unit' - i.e.
-is 1k a 1000 (default, `benchmark::Counter::OneK::kIs1000`), or 1024
-(`benchmark::Counter::OneK::kIs1024`)?
-
-```c++
-  // sets a simple counter
-  state.counters["Foo"] = numFoos;
-
-  // Set the counter as a rate. It will be presented divided
-  // by the duration of the benchmark.
-  // Meaning: per one second, how many 'foo's are processed?
-  state.counters["FooRate"] = Counter(numFoos, benchmark::Counter::kIsRate);
-
-  // Set the counter as a rate. It will be presented divided
-  // by the duration of the benchmark, and the result inverted.
-  // Meaning: how many seconds it takes to process one 'foo'?
-  state.counters["FooInvRate"] = Counter(numFoos, benchmark::Counter::kIsRate | benchmark::Counter::kInvert);
-
-  // Set the counter as a thread-average quantity. It will
-  // be presented divided by the number of threads.
-  state.counters["FooAvg"] = Counter(numFoos, benchmark::Counter::kAvgThreads);
-
-  // There's also a combined flag:
-  state.counters["FooAvgRate"] = Counter(numFoos,benchmark::Counter::kAvgThreadsRate);
-
-  // This says that we process with the rate of state.range(0) bytes every iteration:
-  state.counters["BytesProcessed"] = Counter(state.range(0), benchmark::Counter::kIsIterationInvariantRate, benchmark::Counter::OneK::kIs1024);
-```
-
-When you're compiling in C++11 mode or later you can use `insert()` with
-`std::initializer_list`:
-
-{% raw %}
-```c++
-  // With C++11, this can be done:
-  state.counters.insert({{"Foo", numFoos}, {"Bar", numBars}, {"Baz", numBazs}});
-  // ... instead of:
-  state.counters["Foo"] = numFoos;
-  state.counters["Bar"] = numBars;
-  state.counters["Baz"] = numBazs;
-```
-{% endraw %}
-
-### Counter Reporting
-
-When using the console reporter, by default, user counters are printed at
-the end after the table, the same way as ``bytes_processed`` and
-``items_processed``. This is best for cases in which there are few counters,
-or where there are only a couple of lines per benchmark. Here's an example of
-the default output:
-
-```
-------------------------------------------------------------------------------
-Benchmark                        Time           CPU Iterations UserCounters...
-------------------------------------------------------------------------------
-BM_UserCounter/threads:8      2248 ns      10277 ns      68808 Bar=16 Bat=40 Baz=24 Foo=8
-BM_UserCounter/threads:1      9797 ns       9788 ns      71523 Bar=2 Bat=5 Baz=3 Foo=1024m
-BM_UserCounter/threads:2      4924 ns       9842 ns      71036 Bar=4 Bat=10 Baz=6 Foo=2
-BM_UserCounter/threads:4      2589 ns      10284 ns      68012 Bar=8 Bat=20 Baz=12 Foo=4
-BM_UserCounter/threads:8      2212 ns      10287 ns      68040 Bar=16 Bat=40 Baz=24 Foo=8
-BM_UserCounter/threads:16     1782 ns      10278 ns      68144 Bar=32 Bat=80 Baz=48 Foo=16
-BM_UserCounter/threads:32     1291 ns      10296 ns      68256 Bar=64 Bat=160 Baz=96 Foo=32
-BM_UserCounter/threads:4      2615 ns      10307 ns      68040 Bar=8 Bat=20 Baz=12 Foo=4
-BM_Factorial                    26 ns         26 ns   26608979 40320
-BM_Factorial/real_time          26 ns         26 ns   26587936 40320
-BM_CalculatePiRange/1           16 ns         16 ns   45704255 0
-BM_CalculatePiRange/8           73 ns         73 ns    9520927 3.28374
-BM_CalculatePiRange/64         609 ns        609 ns    1140647 3.15746
-BM_CalculatePiRange/512       4900 ns       4901 ns     142696 3.14355
-```
-
-If this doesn't suit you, you can print each counter as a table column by
-passing the flag `--benchmark_counters_tabular=true` to the benchmark
-application. This is best for cases in which there are a lot of counters, or
-a lot of lines per individual benchmark. Note that this will trigger a
-reprinting of the table header any time the counter set changes between
-individual benchmarks. Here's an example of corresponding output when
-`--benchmark_counters_tabular=true` is passed:
-
-```
----------------------------------------------------------------------------------------
-Benchmark                        Time           CPU Iterations    Bar   Bat   Baz   Foo
----------------------------------------------------------------------------------------
-BM_UserCounter/threads:8      2198 ns       9953 ns      70688     16    40    24     8
-BM_UserCounter/threads:1      9504 ns       9504 ns      73787      2     5     3     1
-BM_UserCounter/threads:2      4775 ns       9550 ns      72606      4    10     6     2
-BM_UserCounter/threads:4      2508 ns       9951 ns      70332      8    20    12     4
-BM_UserCounter/threads:8      2055 ns       9933 ns      70344     16    40    24     8
-BM_UserCounter/threads:16     1610 ns       9946 ns      70720     32    80    48    16
-BM_UserCounter/threads:32     1192 ns       9948 ns      70496     64   160    96    32
-BM_UserCounter/threads:4      2506 ns       9949 ns      70332      8    20    12     4
---------------------------------------------------------------
-Benchmark                        Time           CPU Iterations
---------------------------------------------------------------
-BM_Factorial                    26 ns         26 ns   26392245 40320
-BM_Factorial/real_time          26 ns         26 ns   26494107 40320
-BM_CalculatePiRange/1           15 ns         15 ns   45571597 0
-BM_CalculatePiRange/8           74 ns         74 ns    9450212 3.28374
-BM_CalculatePiRange/64         595 ns        595 ns    1173901 3.15746
-BM_CalculatePiRange/512       4752 ns       4752 ns     147380 3.14355
-BM_CalculatePiRange/4k       37970 ns      37972 ns      18453 3.14184
-BM_CalculatePiRange/32k     303733 ns     303744 ns       2305 3.14162
-BM_CalculatePiRange/256k   2434095 ns    2434186 ns        288 3.1416
-BM_CalculatePiRange/1024k  9721140 ns    9721413 ns         71 3.14159
-BM_CalculatePi/threads:8      2255 ns       9943 ns      70936
-```
-
-Note above the additional header printed when the benchmark changes from
-``BM_UserCounter`` to ``BM_Factorial``. This is because ``BM_Factorial`` does
-not have the same counter set as ``BM_UserCounter``.
-
-<a name="multithreaded-benchmarks"/>
-
-## Multithreaded Benchmarks
-
-In a multithreaded test (benchmark invoked by multiple threads simultaneously),
-it is guaranteed that none of the threads will start until all have reached
-the start of the benchmark loop, and all will have finished before any thread
-exits the benchmark loop. (This behavior is also provided by the `KeepRunning()`
-API) As such, any global setup or teardown can be wrapped in a check against the thread
-index:
-
-```c++
-static void BM_MultiThreaded(benchmark::State& state) {
-  if (state.thread_index() == 0) {
-    // Setup code here.
-  }
-  for (auto _ : state) {
-    // Run the test as normal.
-  }
-  if (state.thread_index() == 0) {
-    // Teardown code here.
-  }
-}
-BENCHMARK(BM_MultiThreaded)->Threads(2);
-```
-
-If the benchmarked code itself uses threads and you want to compare it to
-single-threaded code, you may want to use real-time ("wallclock") measurements
-for latency comparisons:
-
-```c++
-BENCHMARK(BM_test)->Range(8, 8<<10)->UseRealTime();
-```
-
-Without `UseRealTime`, CPU time is used by default.
-
-<a name="cpu-timers" />
-
-## CPU Timers
-
-By default, the CPU timer only measures the time spent by the main thread.
-If the benchmark itself uses threads internally, this measurement may not
-be what you are looking for. Instead, there is a way to measure the total
-CPU usage of the process, by all the threads.
-
-```c++
-void callee(int i);
-
-static void MyMain(int size) {
-#pragma omp parallel for
-  for(int i = 0; i < size; i++)
-    callee(i);
-}
-
-static void BM_OpenMP(benchmark::State& state) {
-  for (auto _ : state)
-    MyMain(state.range(0));
-}
-
-// Measure the time spent by the main thread, use it to decide for how long to
-// run the benchmark loop. Depending on the internal implementation detail may
-// measure to anywhere from near-zero (the overhead spent before/after work
-// handoff to worker thread[s]) to the whole single-thread time.
-BENCHMARK(BM_OpenMP)->Range(8, 8<<10);
-
-// Measure the user-visible time, the wall clock (literally, the time that
-// has passed on the clock on the wall), use it to decide for how long to
-// run the benchmark loop. This will always be meaningful, an will match the
-// time spent by the main thread in single-threaded case, in general decreasing
-// with the number of internal threads doing the work.
-BENCHMARK(BM_OpenMP)->Range(8, 8<<10)->UseRealTime();
-
-// Measure the total CPU consumption, use it to decide for how long to
-// run the benchmark loop. This will always measure to no less than the
-// time spent by the main thread in single-threaded case.
-BENCHMARK(BM_OpenMP)->Range(8, 8<<10)->MeasureProcessCPUTime();
-
-// A mixture of the last two. Measure the total CPU consumption, but use the
-// wall clock to decide for how long to run the benchmark loop.
-BENCHMARK(BM_OpenMP)->Range(8, 8<<10)->MeasureProcessCPUTime()->UseRealTime();
-```
-
-### Controlling Timers
-
-Normally, the entire duration of the work loop (`for (auto _ : state) {}`)
-is measured. But sometimes, it is necessary to do some work inside of
-that loop, every iteration, but without counting that time to the benchmark time.
-That is possible, although it is not recommended, since it has high overhead.
-
-{% raw %}
-```c++
-static void BM_SetInsert_With_Timer_Control(benchmark::State& state) {
-  std::set<int> data;
-  for (auto _ : state) {
-    state.PauseTiming(); // Stop timers. They will not count until they are resumed.
-    data = ConstructRandomSet(state.range(0)); // Do something that should not be measured
-    state.ResumeTiming(); // And resume timers. They are now counting again.
-    // The rest will be measured.
-    for (int j = 0; j < state.range(1); ++j)
-      data.insert(RandomNumber());
-  }
-}
-BENCHMARK(BM_SetInsert_With_Timer_Control)->Ranges({{1<<10, 8<<10}, {128, 512}});
-```
-{% endraw %}
-
-<a name="manual-timing" />
-
-## Manual Timing
-
-For benchmarking something for which neither CPU time nor real-time are
-correct or accurate enough, completely manual timing is supported using
-the `UseManualTime` function.
-
-When `UseManualTime` is used, the benchmarked code must call
-`SetIterationTime` once per iteration of the benchmark loop to
-report the manually measured time.
-
-An example use case for this is benchmarking GPU execution (e.g. OpenCL
-or CUDA kernels, OpenGL or Vulkan or Direct3D draw calls), which cannot
-be accurately measured using CPU time or real-time. Instead, they can be
-measured accurately using a dedicated API, and these measurement results
-can be reported back with `SetIterationTime`.
-
-```c++
-static void BM_ManualTiming(benchmark::State& state) {
-  int microseconds = state.range(0);
-  std::chrono::duration<double, std::micro> sleep_duration {
-    static_cast<double>(microseconds)
-  };
-
-  for (auto _ : state) {
-    auto start = std::chrono::high_resolution_clock::now();
-    // Simulate some useful workload with a sleep
-    std::this_thread::sleep_for(sleep_duration);
-    auto end = std::chrono::high_resolution_clock::now();
-
-    auto elapsed_seconds =
-      std::chrono::duration_cast<std::chrono::duration<double>>(
-        end - start);
-
-    state.SetIterationTime(elapsed_seconds.count());
-  }
-}
-BENCHMARK(BM_ManualTiming)->Range(1, 1<<17)->UseManualTime();
-```
-
-<a name="setting-the-time-unit" />
-
-## Setting the Time Unit
-
-If a benchmark runs a few milliseconds it may be hard to visually compare the
-measured times, since the output data is given in nanoseconds per default. In
-order to manually set the time unit, you can specify it manually:
-
-```c++
-BENCHMARK(BM_test)->Unit(benchmark::kMillisecond);
-```
-
-<a name="preventing-optimization" />
-
-## Preventing Optimization
-
-To prevent a value or expression from being optimized away by the compiler
-the `benchmark::DoNotOptimize(...)` and `benchmark::ClobberMemory()`
-functions can be used.
-
-```c++
-static void BM_test(benchmark::State& state) {
-  for (auto _ : state) {
-      int x = 0;
-      for (int i=0; i < 64; ++i) {
-        benchmark::DoNotOptimize(x += i);
-      }
-  }
-}
-```
-
-`DoNotOptimize(<expr>)` forces the  *result* of `<expr>` to be stored in either
-memory or a register. For GNU based compilers it acts as read/write barrier
-for global memory. More specifically it forces the compiler to flush pending
-writes to memory and reload any other values as necessary.
-
-Note that `DoNotOptimize(<expr>)` does not prevent optimizations on `<expr>`
-in any way. `<expr>` may even be removed entirely when the result is already
-known. For example:
-
-```c++
-  /* Example 1: `<expr>` is removed entirely. */
-  int foo(int x) { return x + 42; }
-  while (...) DoNotOptimize(foo(0)); // Optimized to DoNotOptimize(42);
-
-  /*  Example 2: Result of '<expr>' is only reused */
-  int bar(int) __attribute__((const));
-  while (...) DoNotOptimize(bar(0)); // Optimized to:
-  // int __result__ = bar(0);
-  // while (...) DoNotOptimize(__result__);
-```
-
-The second tool for preventing optimizations is `ClobberMemory()`. In essence
-`ClobberMemory()` forces the compiler to perform all pending writes to global
-memory. Memory managed by block scope objects must be "escaped" using
-`DoNotOptimize(...)` before it can be clobbered. In the below example
-`ClobberMemory()` prevents the call to `v.push_back(42)` from being optimized
-away.
-
-```c++
-static void BM_vector_push_back(benchmark::State& state) {
-  for (auto _ : state) {
-    std::vector<int> v;
-    v.reserve(1);
-    benchmark::DoNotOptimize(v.data()); // Allow v.data() to be clobbered.
-    v.push_back(42);
-    benchmark::ClobberMemory(); // Force 42 to be written to memory.
-  }
-}
-```
-
-Note that `ClobberMemory()` is only available for GNU or MSVC based compilers.
-
-<a name="reporting-statistics" />
-
-## Statistics: Reporting the Mean, Median and Standard Deviation / Coefficient of variation of Repeated Benchmarks
-
-By default each benchmark is run once and that single result is reported.
-However benchmarks are often noisy and a single result may not be representative
-of the overall behavior. For this reason it's possible to repeatedly rerun the
-benchmark.
-
-The number of runs of each benchmark is specified globally by the
-`--benchmark_repetitions` flag or on a per benchmark basis by calling
-`Repetitions` on the registered benchmark object. When a benchmark is run more
-than once the mean, median, standard deviation and coefficient of variation
-of the runs will be reported.
-
-Additionally the `--benchmark_report_aggregates_only={true|false}`,
-`--benchmark_display_aggregates_only={true|false}` flags or
-`ReportAggregatesOnly(bool)`, `DisplayAggregatesOnly(bool)` functions can be
-used to change how repeated tests are reported. By default the result of each
-repeated run is reported. When `report aggregates only` option is `true`,
-only the aggregates (i.e. mean, median, standard deviation and coefficient
-of variation, maybe complexity measurements if they were requested) of the runs
-is reported, to both the reporters - standard output (console), and the file.
-However when only the `display aggregates only` option is `true`,
-only the aggregates are displayed in the standard output, while the file
-output still contains everything.
-Calling `ReportAggregatesOnly(bool)` / `DisplayAggregatesOnly(bool)` on a
-registered benchmark object overrides the value of the appropriate flag for that
-benchmark.
-
-<a name="custom-statistics" />
-
-## Custom Statistics
-
-While having these aggregates is nice, this may not be enough for everyone.
-For example you may want to know what the largest observation is, e.g. because
-you have some real-time constraints. This is easy. The following code will
-specify a custom statistic to be calculated, defined by a lambda function.
-
-```c++
-void BM_spin_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    for (int x = 0; x < state.range(0); ++x) {
-      benchmark::DoNotOptimize(x);
-    }
-  }
-}
-
-BENCHMARK(BM_spin_empty)
-  ->ComputeStatistics("max", [](const std::vector<double>& v) -> double {
-    return *(std::max_element(std::begin(v), std::end(v)));
-  })
-  ->Arg(512);
-```
-
-While usually the statistics produce values in time units,
-you can also produce percentages:
-
-```c++
-void BM_spin_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    for (int x = 0; x < state.range(0); ++x) {
-      benchmark::DoNotOptimize(x);
-    }
-  }
-}
-
-BENCHMARK(BM_spin_empty)
-  ->ComputeStatistics("ratio", [](const std::vector<double>& v) -> double {
-    return std::begin(v) / std::end(v);
-  }, benchmark::StatisticUnit::Percentage)
-  ->Arg(512);
-```
-
-<a name="using-register-benchmark" />
-
-## Using RegisterBenchmark(name, fn, args...)
-
-The `RegisterBenchmark(name, func, args...)` function provides an alternative
-way to create and register benchmarks.
-`RegisterBenchmark(name, func, args...)` creates, registers, and returns a
-pointer to a new benchmark with the specified `name` that invokes
-`func(st, args...)` where `st` is a `benchmark::State` object.
-
-Unlike the `BENCHMARK` registration macros, which can only be used at the global
-scope, the `RegisterBenchmark` can be called anywhere. This allows for
-benchmark tests to be registered programmatically.
-
-Additionally `RegisterBenchmark` allows any callable object to be registered
-as a benchmark. Including capturing lambdas and function objects.
-
-For Example:
-```c++
-auto BM_test = [](benchmark::State& st, auto Inputs) { /* ... */ };
-
-int main(int argc, char** argv) {
-  for (auto& test_input : { /* ... */ })
-      benchmark::RegisterBenchmark(test_input.name(), BM_test, test_input);
-  benchmark::Initialize(&argc, argv);
-  benchmark::RunSpecifiedBenchmarks();
-  benchmark::Shutdown();
-}
-```
-
-<a name="exiting-with-an-error" />
-
-## Exiting with an Error
-
-When errors caused by external influences, such as file I/O and network
-communication, occur within a benchmark the
-`State::SkipWithError(const char* msg)` function can be used to skip that run
-of benchmark and report the error. Note that only future iterations of the
-`KeepRunning()` are skipped. For the ranged-for version of the benchmark loop
-Users must explicitly exit the loop, otherwise all iterations will be performed.
-Users may explicitly return to exit the benchmark immediately.
-
-The `SkipWithError(...)` function may be used at any point within the benchmark,
-including before and after the benchmark loop. Moreover, if `SkipWithError(...)`
-has been used, it is not required to reach the benchmark loop and one may return
-from the benchmark function early.
-
-For example:
-
-```c++
-static void BM_test(benchmark::State& state) {
-  auto resource = GetResource();
-  if (!resource.good()) {
-    state.SkipWithError("Resource is not good!");
-    // KeepRunning() loop will not be entered.
-  }
-  while (state.KeepRunning()) {
-    auto data = resource.read_data();
-    if (!resource.good()) {
-      state.SkipWithError("Failed to read data!");
-      break; // Needed to skip the rest of the iteration.
-    }
-    do_stuff(data);
-  }
-}
-
-static void BM_test_ranged_fo(benchmark::State & state) {
-  auto resource = GetResource();
-  if (!resource.good()) {
-    state.SkipWithError("Resource is not good!");
-    return; // Early return is allowed when SkipWithError() has been used.
-  }
-  for (auto _ : state) {
-    auto data = resource.read_data();
-    if (!resource.good()) {
-      state.SkipWithError("Failed to read data!");
-      break; // REQUIRED to prevent all further iterations.
-    }
-    do_stuff(data);
-  }
-}
-```
-<a name="a-faster-keep-running-loop" />
-
-## A Faster KeepRunning Loop
-
-In C++11 mode, a ranged-based for loop should be used in preference to
-the `KeepRunning` loop for running the benchmarks. For example:
-
-```c++
-static void BM_Fast(benchmark::State &state) {
-  for (auto _ : state) {
-    FastOperation();
-  }
-}
-BENCHMARK(BM_Fast);
-```
-
-The reason the ranged-for loop is faster than using `KeepRunning`, is
-because `KeepRunning` requires a memory load and store of the iteration count
-ever iteration, whereas the ranged-for variant is able to keep the iteration count
-in a register.
-
-For example, an empty inner loop of using the ranged-based for method looks like:
-
-```asm
-# Loop Init
-  mov rbx, qword ptr [r14 + 104]
-  call benchmark::State::StartKeepRunning()
-  test rbx, rbx
-  je .LoopEnd
-.LoopHeader: # =>This Inner Loop Header: Depth=1
-  add rbx, -1
-  jne .LoopHeader
-.LoopEnd:
-```
-
-Compared to an empty `KeepRunning` loop, which looks like:
-
-```asm
-.LoopHeader: # in Loop: Header=BB0_3 Depth=1
-  cmp byte ptr [rbx], 1
-  jne .LoopInit
-.LoopBody: # =>This Inner Loop Header: Depth=1
-  mov rax, qword ptr [rbx + 8]
-  lea rcx, [rax + 1]
-  mov qword ptr [rbx + 8], rcx
-  cmp rax, qword ptr [rbx + 104]
-  jb .LoopHeader
-  jmp .LoopEnd
-.LoopInit:
-  mov rdi, rbx
-  call benchmark::State::StartKeepRunning()
-  jmp .LoopBody
-.LoopEnd:
-```
-
-Unless C++03 compatibility is required, the ranged-for variant of writing
-the benchmark loop should be preferred.
-
-<a name="disabling-cpu-frequency-scaling" />
-
-## Disabling CPU Frequency Scaling
-
-If you see this error:
-
-```
-***WARNING*** CPU scaling is enabled, the benchmark real time measurements may be noisy and will incur extra overhead.
-```
-
-you might want to disable the CPU frequency scaling while running the benchmark:
-
-```bash
-sudo cpupower frequency-set --governor performance
-./mybench
-sudo cpupower frequency-set --governor powersave
-```
diff --git a/3rdparty/benchmark/include/benchmark/benchmark.h b/3rdparty/benchmark/include/benchmark/benchmark.h
deleted file mode 100644
index c8ced387..00000000
--- a/3rdparty/benchmark/include/benchmark/benchmark.h
+++ /dev/null
@@ -1,1765 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Support for registering benchmarks for functions.
-
-/* Example usage:
-// Define a function that executes the code to be measured a
-// specified number of times:
-static void BM_StringCreation(benchmark::State& state) {
-  for (auto _ : state)
-    std::string empty_string;
-}
-
-// Register the function as a benchmark
-BENCHMARK(BM_StringCreation);
-
-// Define another benchmark
-static void BM_StringCopy(benchmark::State& state) {
-  std::string x = "hello";
-  for (auto _ : state)
-    std::string copy(x);
-}
-BENCHMARK(BM_StringCopy);
-
-// Augment the main() program to invoke benchmarks if specified
-// via the --benchmark_filter command line flag.  E.g.,
-//       my_unittest --benchmark_filter=all
-//       my_unittest --benchmark_filter=BM_StringCreation
-//       my_unittest --benchmark_filter=String
-//       my_unittest --benchmark_filter='Copy|Creation'
-int main(int argc, char** argv) {
-  benchmark::Initialize(&argc, argv);
-  benchmark::RunSpecifiedBenchmarks();
-  benchmark::Shutdown();
-  return 0;
-}
-
-// Sometimes a family of microbenchmarks can be implemented with
-// just one routine that takes an extra argument to specify which
-// one of the family of benchmarks to run.  For example, the following
-// code defines a family of microbenchmarks for measuring the speed
-// of memcpy() calls of different lengths:
-
-static void BM_memcpy(benchmark::State& state) {
-  char* src = new char[state.range(0)]; char* dst = new char[state.range(0)];
-  memset(src, 'x', state.range(0));
-  for (auto _ : state)
-    memcpy(dst, src, state.range(0));
-  state.SetBytesProcessed(state.iterations() * state.range(0));
-  delete[] src; delete[] dst;
-}
-BENCHMARK(BM_memcpy)->Arg(8)->Arg(64)->Arg(512)->Arg(1<<10)->Arg(8<<10);
-
-// The preceding code is quite repetitive, and can be replaced with the
-// following short-hand.  The following invocation will pick a few
-// appropriate arguments in the specified range and will generate a
-// microbenchmark for each such argument.
-BENCHMARK(BM_memcpy)->Range(8, 8<<10);
-
-// You might have a microbenchmark that depends on two inputs.  For
-// example, the following code defines a family of microbenchmarks for
-// measuring the speed of set insertion.
-static void BM_SetInsert(benchmark::State& state) {
-  set<int> data;
-  for (auto _ : state) {
-    state.PauseTiming();
-    data = ConstructRandomSet(state.range(0));
-    state.ResumeTiming();
-    for (int j = 0; j < state.range(1); ++j)
-      data.insert(RandomNumber());
-  }
-}
-BENCHMARK(BM_SetInsert)
-   ->Args({1<<10, 128})
-   ->Args({2<<10, 128})
-   ->Args({4<<10, 128})
-   ->Args({8<<10, 128})
-   ->Args({1<<10, 512})
-   ->Args({2<<10, 512})
-   ->Args({4<<10, 512})
-   ->Args({8<<10, 512});
-
-// The preceding code is quite repetitive, and can be replaced with
-// the following short-hand.  The following macro will pick a few
-// appropriate arguments in the product of the two specified ranges
-// and will generate a microbenchmark for each such pair.
-BENCHMARK(BM_SetInsert)->Ranges({{1<<10, 8<<10}, {128, 512}});
-
-// For more complex patterns of inputs, passing a custom function
-// to Apply allows programmatic specification of an
-// arbitrary set of arguments to run the microbenchmark on.
-// The following example enumerates a dense range on
-// one parameter, and a sparse range on the second.
-static void CustomArguments(benchmark::internal::Benchmark* b) {
-  for (int i = 0; i <= 10; ++i)
-    for (int j = 32; j <= 1024*1024; j *= 8)
-      b->Args({i, j});
-}
-BENCHMARK(BM_SetInsert)->Apply(CustomArguments);
-
-// Templated microbenchmarks work the same way:
-// Produce then consume 'size' messages 'iters' times
-// Measures throughput in the absence of multiprogramming.
-template <class Q> int BM_Sequential(benchmark::State& state) {
-  Q q;
-  typename Q::value_type v;
-  for (auto _ : state) {
-    for (int i = state.range(0); i--; )
-      q.push(v);
-    for (int e = state.range(0); e--; )
-      q.Wait(&v);
-  }
-  // actually messages, not bytes:
-  state.SetBytesProcessed(state.iterations() * state.range(0));
-}
-BENCHMARK_TEMPLATE(BM_Sequential, WaitQueue<int>)->Range(1<<0, 1<<10);
-
-Use `Benchmark::MinTime(double t)` to set the minimum time used to run the
-benchmark. This option overrides the `benchmark_min_time` flag.
-
-void BM_test(benchmark::State& state) {
- ... body ...
-}
-BENCHMARK(BM_test)->MinTime(2.0); // Run for at least 2 seconds.
-
-In a multithreaded test, it is guaranteed that none of the threads will start
-until all have reached the loop start, and all will have finished before any
-thread exits the loop body. As such, any global setup or teardown you want to
-do can be wrapped in a check against the thread index:
-
-static void BM_MultiThreaded(benchmark::State& state) {
-  if (state.thread_index() == 0) {
-    // Setup code here.
-  }
-  for (auto _ : state) {
-    // Run the test as normal.
-  }
-  if (state.thread_index() == 0) {
-    // Teardown code here.
-  }
-}
-BENCHMARK(BM_MultiThreaded)->Threads(4);
-
-
-If a benchmark runs a few milliseconds it may be hard to visually compare the
-measured times, since the output data is given in nanoseconds per default. In
-order to manually set the time unit, you can specify it manually:
-
-BENCHMARK(BM_test)->Unit(benchmark::kMillisecond);
-*/
-
-#ifndef BENCHMARK_BENCHMARK_H_
-#define BENCHMARK_BENCHMARK_H_
-
-// The _MSVC_LANG check should detect Visual Studio 2015 Update 3 and newer.
-#if __cplusplus >= 201103L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201103L)
-#define BENCHMARK_HAS_CXX11
-#endif
-
-// This _MSC_VER check should detect VS 2017 v15.3 and newer.
-#if __cplusplus >= 201703L || \
-    (defined(_MSC_VER) && _MSC_VER >= 1911 && _MSVC_LANG >= 201703L)
-#define BENCHMARK_HAS_CXX17
-#endif
-
-#include <stdint.h>
-
-#include <algorithm>
-#include <cassert>
-#include <cstddef>
-#include <iosfwd>
-#include <limits>
-#include <map>
-#include <set>
-#include <string>
-#include <utility>
-#include <vector>
-
-#if defined(BENCHMARK_HAS_CXX11)
-#include <atomic>
-#include <initializer_list>
-#include <type_traits>
-#include <utility>
-#endif
-
-#if defined(_MSC_VER)
-#include <intrin.h>  // for _ReadWriteBarrier
-#endif
-
-#ifndef BENCHMARK_HAS_CXX11
-#define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName) \
-  TypeName(const TypeName&);                         \
-  TypeName& operator=(const TypeName&)
-#else
-#define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName) \
-  TypeName(const TypeName&) = delete;                \
-  TypeName& operator=(const TypeName&) = delete
-#endif
-
-#ifdef BENCHMARK_HAS_CXX17
-#define BENCHMARK_UNUSED [[maybe_unused]]
-#elif defined(__GNUC__) || defined(__clang__)
-#define BENCHMARK_UNUSED __attribute__((unused))
-#else
-#define BENCHMARK_UNUSED
-#endif
-
-#if defined(__GNUC__) || defined(__clang__)
-#define BENCHMARK_ALWAYS_INLINE __attribute__((always_inline))
-#define BENCHMARK_NOEXCEPT noexcept
-#define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
-#elif defined(_MSC_VER) && !defined(__clang__)
-#define BENCHMARK_ALWAYS_INLINE __forceinline
-#if _MSC_VER >= 1900
-#define BENCHMARK_NOEXCEPT noexcept
-#define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
-#else
-#define BENCHMARK_NOEXCEPT
-#define BENCHMARK_NOEXCEPT_OP(x)
-#endif
-#define __func__ __FUNCTION__
-#else
-#define BENCHMARK_ALWAYS_INLINE
-#define BENCHMARK_NOEXCEPT
-#define BENCHMARK_NOEXCEPT_OP(x)
-#endif
-
-#define BENCHMARK_INTERNAL_TOSTRING2(x) #x
-#define BENCHMARK_INTERNAL_TOSTRING(x) BENCHMARK_INTERNAL_TOSTRING2(x)
-
-// clang-format off
-#if defined(__GNUC__) || defined(__clang__)
-#define BENCHMARK_BUILTIN_EXPECT(x, y) __builtin_expect(x, y)
-#define BENCHMARK_DEPRECATED_MSG(msg) __attribute__((deprecated(msg)))
-#define BENCHMARK_DISABLE_DEPRECATED_WARNING \
-  _Pragma("GCC diagnostic push")             \
-  _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
-#define BENCHMARK_RESTORE_DEPRECATED_WARNING _Pragma("GCC diagnostic pop")
-#else
-#define BENCHMARK_BUILTIN_EXPECT(x, y) x
-#define BENCHMARK_DEPRECATED_MSG(msg)
-#define BENCHMARK_WARNING_MSG(msg)                           \
-  __pragma(message(__FILE__ "(" BENCHMARK_INTERNAL_TOSTRING( \
-      __LINE__) ") : warning note: " msg))
-#define BENCHMARK_DISABLE_DEPRECATED_WARNING
-#define BENCHMARK_RESTORE_DEPRECATED_WARNING
-#endif
-// clang-format on
-
-#if defined(__GNUC__) && !defined(__clang__)
-#define BENCHMARK_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-#endif
-
-#ifndef __has_builtin
-#define __has_builtin(x) 0
-#endif
-
-#if defined(__GNUC__) || __has_builtin(__builtin_unreachable)
-#define BENCHMARK_UNREACHABLE() __builtin_unreachable()
-#elif defined(_MSC_VER)
-#define BENCHMARK_UNREACHABLE() __assume(false)
-#else
-#define BENCHMARK_UNREACHABLE() ((void)0)
-#endif
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_OVERRIDE override
-#else
-#define BENCHMARK_OVERRIDE
-#endif
-
-namespace benchmark {
-class BenchmarkReporter;
-
-void Initialize(int* argc, char** argv);
-void Shutdown();
-
-// Report to stdout all arguments in 'argv' as unrecognized except the first.
-// Returns true there is at least on unrecognized argument (i.e. 'argc' > 1).
-bool ReportUnrecognizedArguments(int argc, char** argv);
-
-// Returns the current value of --benchmark_filter.
-std::string GetBenchmarkFilter();
-
-// Generate a list of benchmarks matching the specified --benchmark_filter flag
-// and if --benchmark_list_tests is specified return after printing the name
-// of each matching benchmark. Otherwise run each matching benchmark and
-// report the results.
-//
-// spec : Specify the benchmarks to run. If users do not specify this arg,
-//        then the value of FLAGS_benchmark_filter
-//        will be used.
-//
-// The second and third overload use the specified 'display_reporter' and
-//  'file_reporter' respectively. 'file_reporter' will write to the file
-//  specified
-//   by '--benchmark_output'. If '--benchmark_output' is not given the
-//  'file_reporter' is ignored.
-//
-// RETURNS: The number of matching benchmarks.
-size_t RunSpecifiedBenchmarks();
-size_t RunSpecifiedBenchmarks(std::string spec);
-
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter);
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
-                              std::string spec);
-
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
-                              BenchmarkReporter* file_reporter);
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
-                              BenchmarkReporter* file_reporter,
-                              std::string spec);
-
-// If a MemoryManager is registered (via RegisterMemoryManager()),
-// it can be used to collect and report allocation metrics for a run of the
-// benchmark.
-class MemoryManager {
- public:
-  static const int64_t TombstoneValue;
-
-  struct Result {
-    Result()
-        : num_allocs(0),
-          max_bytes_used(0),
-          total_allocated_bytes(TombstoneValue),
-          net_heap_growth(TombstoneValue) {}
-
-    // The number of allocations made in total between Start and Stop.
-    int64_t num_allocs;
-
-    // The peak memory use between Start and Stop.
-    int64_t max_bytes_used;
-
-    // The total memory allocated, in bytes, between Start and Stop.
-    // Init'ed to TombstoneValue if metric not available.
-    int64_t total_allocated_bytes;
-
-    // The net changes in memory, in bytes, between Start and Stop.
-    // ie., total_allocated_bytes - total_deallocated_bytes.
-    // Init'ed to TombstoneValue if metric not available.
-    int64_t net_heap_growth;
-  };
-
-  virtual ~MemoryManager() {}
-
-  // Implement this to start recording allocation information.
-  virtual void Start() = 0;
-
-  // Implement this to stop recording and fill out the given Result structure.
-  BENCHMARK_DEPRECATED_MSG("Use Stop(Result&) instead")
-  virtual void Stop(Result* result) = 0;
-
-  // FIXME(vyng): Make this pure virtual once we've migrated current users.
-  BENCHMARK_DISABLE_DEPRECATED_WARNING
-  virtual void Stop(Result& result) { Stop(&result); }
-  BENCHMARK_RESTORE_DEPRECATED_WARNING
-};
-
-// Register a MemoryManager instance that will be used to collect and report
-// allocation measurements for benchmark runs.
-void RegisterMemoryManager(MemoryManager* memory_manager);
-
-// Add a key-value pair to output as part of the context stanza in the report.
-void AddCustomContext(const std::string& key, const std::string& value);
-
-namespace internal {
-class Benchmark;
-class BenchmarkImp;
-class BenchmarkFamilies;
-
-void UseCharPointer(char const volatile*);
-
-// Take ownership of the pointer and register the benchmark. Return the
-// registered benchmark.
-Benchmark* RegisterBenchmarkInternal(Benchmark*);
-
-// Ensure that the standard streams are properly initialized in every TU.
-int InitializeStreams();
-BENCHMARK_UNUSED static int stream_init_anchor = InitializeStreams();
-
-}  // namespace internal
-
-#if (!defined(__GNUC__) && !defined(__clang__)) || defined(__pnacl__) || \
-    defined(__EMSCRIPTEN__)
-#define BENCHMARK_HAS_NO_INLINE_ASSEMBLY
-#endif
-
-// Force the compiler to flush pending writes to global memory. Acts as an
-// effective read/write barrier
-#ifdef BENCHMARK_HAS_CXX11
-inline BENCHMARK_ALWAYS_INLINE void ClobberMemory() {
-  std::atomic_signal_fence(std::memory_order_acq_rel);
-}
-#endif
-
-// The DoNotOptimize(...) function can be used to prevent a value or
-// expression from being optimized away by the compiler. This function is
-// intended to add little to no overhead.
-// See: https://youtu.be/nXaxk27zwlk?t=2441
-#ifndef BENCHMARK_HAS_NO_INLINE_ASSEMBLY
-template <class Tp>
-inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {
-  asm volatile("" : : "r,m"(value) : "memory");
-}
-
-template <class Tp>
-inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp& value) {
-#if defined(__clang__)
-  asm volatile("" : "+r,m"(value) : : "memory");
-#else
-  asm volatile("" : "+m,r"(value) : : "memory");
-#endif
-}
-
-#ifndef BENCHMARK_HAS_CXX11
-inline BENCHMARK_ALWAYS_INLINE void ClobberMemory() {
-  asm volatile("" : : : "memory");
-}
-#endif
-#elif defined(_MSC_VER)
-template <class Tp>
-inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {
-  internal::UseCharPointer(&reinterpret_cast<char const volatile&>(value));
-  _ReadWriteBarrier();
-}
-
-#ifndef BENCHMARK_HAS_CXX11
-inline BENCHMARK_ALWAYS_INLINE void ClobberMemory() { _ReadWriteBarrier(); }
-#endif
-#else
-template <class Tp>
-inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {
-  internal::UseCharPointer(&reinterpret_cast<char const volatile&>(value));
-}
-// FIXME Add ClobberMemory() for non-gnu and non-msvc compilers, before C++11.
-#endif
-
-// This class is used for user-defined counters.
-class Counter {
- public:
-  enum Flags {
-    kDefaults = 0,
-    // Mark the counter as a rate. It will be presented divided
-    // by the duration of the benchmark.
-    kIsRate = 1 << 0,
-    // Mark the counter as a thread-average quantity. It will be
-    // presented divided by the number of threads.
-    kAvgThreads = 1 << 1,
-    // Mark the counter as a thread-average rate. See above.
-    kAvgThreadsRate = kIsRate | kAvgThreads,
-    // Mark the counter as a constant value, valid/same for *every* iteration.
-    // When reporting, it will be *multiplied* by the iteration count.
-    kIsIterationInvariant = 1 << 2,
-    // Mark the counter as a constant rate.
-    // When reporting, it will be *multiplied* by the iteration count
-    // and then divided by the duration of the benchmark.
-    kIsIterationInvariantRate = kIsRate | kIsIterationInvariant,
-    // Mark the counter as a iteration-average quantity.
-    // It will be presented divided by the number of iterations.
-    kAvgIterations = 1 << 3,
-    // Mark the counter as a iteration-average rate. See above.
-    kAvgIterationsRate = kIsRate | kAvgIterations,
-
-    // In the end, invert the result. This is always done last!
-    kInvert = 1 << 31
-  };
-
-  enum OneK {
-    // 1'000 items per 1k
-    kIs1000 = 1000,
-    // 1'024 items per 1k
-    kIs1024 = 1024
-  };
-
-  double value;
-  Flags flags;
-  OneK oneK;
-
-  BENCHMARK_ALWAYS_INLINE
-  Counter(double v = 0., Flags f = kDefaults, OneK k = kIs1000)
-      : value(v), flags(f), oneK(k) {}
-
-  BENCHMARK_ALWAYS_INLINE operator double const &() const { return value; }
-  BENCHMARK_ALWAYS_INLINE operator double&() { return value; }
-};
-
-// A helper for user code to create unforeseen combinations of Flags, without
-// having to do this cast manually each time, or providing this operator.
-Counter::Flags inline operator|(const Counter::Flags& LHS,
-                                const Counter::Flags& RHS) {
-  return static_cast<Counter::Flags>(static_cast<int>(LHS) |
-                                     static_cast<int>(RHS));
-}
-
-// This is the container for the user-defined counters.
-typedef std::map<std::string, Counter> UserCounters;
-
-// TimeUnit is passed to a benchmark in order to specify the order of magnitude
-// for the measured time.
-enum TimeUnit { kNanosecond, kMicrosecond, kMillisecond, kSecond };
-
-// BigO is passed to a benchmark in order to specify the asymptotic
-// computational
-// complexity for the benchmark. In case oAuto is selected, complexity will be
-// calculated automatically to the best fit.
-enum BigO { oNone, o1, oN, oNSquared, oNCubed, oLogN, oNLogN, oAuto, oLambda };
-
-typedef uint64_t IterationCount;
-
-enum StatisticUnit { kTime, kPercentage };
-
-// BigOFunc is passed to a benchmark in order to specify the asymptotic
-// computational complexity for the benchmark.
-typedef double(BigOFunc)(IterationCount);
-
-// StatisticsFunc is passed to a benchmark in order to compute some descriptive
-// statistics over all the measurements of some type
-typedef double(StatisticsFunc)(const std::vector<double>&);
-
-namespace internal {
-struct Statistics {
-  std::string name_;
-  StatisticsFunc* compute_;
-  StatisticUnit unit_;
-
-  Statistics(const std::string& name, StatisticsFunc* compute,
-             StatisticUnit unit = kTime)
-      : name_(name), compute_(compute), unit_(unit) {}
-};
-
-class BenchmarkInstance;
-class ThreadTimer;
-class ThreadManager;
-class PerfCountersMeasurement;
-
-enum AggregationReportMode
-#if defined(BENCHMARK_HAS_CXX11)
-    : unsigned
-#else
-#endif
-{
-  // The mode has not been manually specified
-  ARM_Unspecified = 0,
-  // The mode is user-specified.
-  // This may or may not be set when the following bit-flags are set.
-  ARM_Default = 1U << 0U,
-  // File reporter should only output aggregates.
-  ARM_FileReportAggregatesOnly = 1U << 1U,
-  // Display reporter should only output aggregates
-  ARM_DisplayReportAggregatesOnly = 1U << 2U,
-  // Both reporters should only display aggregates.
-  ARM_ReportAggregatesOnly =
-      ARM_FileReportAggregatesOnly | ARM_DisplayReportAggregatesOnly
-};
-
-}  // namespace internal
-
-// State is passed to a running Benchmark and contains state for the
-// benchmark to use.
-class State {
- public:
-  struct StateIterator;
-  friend struct StateIterator;
-
-  // Returns iterators used to run each iteration of a benchmark using a
-  // C++11 ranged-based for loop. These functions should not be called directly.
-  //
-  // REQUIRES: The benchmark has not started running yet. Neither begin nor end
-  // have been called previously.
-  //
-  // NOTE: KeepRunning may not be used after calling either of these functions.
-  BENCHMARK_ALWAYS_INLINE StateIterator begin();
-  BENCHMARK_ALWAYS_INLINE StateIterator end();
-
-  // Returns true if the benchmark should continue through another iteration.
-  // NOTE: A benchmark may not return from the test until KeepRunning() has
-  // returned false.
-  bool KeepRunning();
-
-  // Returns true iff the benchmark should run n more iterations.
-  // REQUIRES: 'n' > 0.
-  // NOTE: A benchmark must not return from the test until KeepRunningBatch()
-  // has returned false.
-  // NOTE: KeepRunningBatch() may overshoot by up to 'n' iterations.
-  //
-  // Intended usage:
-  //   while (state.KeepRunningBatch(1000)) {
-  //     // process 1000 elements
-  //   }
-  bool KeepRunningBatch(IterationCount n);
-
-  // REQUIRES: timer is running and 'SkipWithError(...)' has not been called
-  //           by the current thread.
-  // Stop the benchmark timer.  If not called, the timer will be
-  // automatically stopped after the last iteration of the benchmark loop.
-  //
-  // For threaded benchmarks the PauseTiming() function only pauses the timing
-  // for the current thread.
-  //
-  // NOTE: The "real time" measurement is per-thread. If different threads
-  // report different measurements the largest one is reported.
-  //
-  // NOTE: PauseTiming()/ResumeTiming() are relatively
-  // heavyweight, and so their use should generally be avoided
-  // within each benchmark iteration, if possible.
-  void PauseTiming();
-
-  // REQUIRES: timer is not running and 'SkipWithError(...)' has not been called
-  //           by the current thread.
-  // Start the benchmark timer.  The timer is NOT running on entrance to the
-  // benchmark function. It begins running after control flow enters the
-  // benchmark loop.
-  //
-  // NOTE: PauseTiming()/ResumeTiming() are relatively
-  // heavyweight, and so their use should generally be avoided
-  // within each benchmark iteration, if possible.
-  void ResumeTiming();
-
-  // REQUIRES: 'SkipWithError(...)' has not been called previously by the
-  //            current thread.
-  // Report the benchmark as resulting in an error with the specified 'msg'.
-  // After this call the user may explicitly 'return' from the benchmark.
-  //
-  // If the ranged-for style of benchmark loop is used, the user must explicitly
-  // break from the loop, otherwise all future iterations will be run.
-  // If the 'KeepRunning()' loop is used the current thread will automatically
-  // exit the loop at the end of the current iteration.
-  //
-  // For threaded benchmarks only the current thread stops executing and future
-  // calls to `KeepRunning()` will block until all threads have completed
-  // the `KeepRunning()` loop. If multiple threads report an error only the
-  // first error message is used.
-  //
-  // NOTE: Calling 'SkipWithError(...)' does not cause the benchmark to exit
-  // the current scope immediately. If the function is called from within
-  // the 'KeepRunning()' loop the current iteration will finish. It is the users
-  // responsibility to exit the scope as needed.
-  void SkipWithError(const char* msg);
-
-  // Returns true if an error has been reported with 'SkipWithError(...)'.
-  bool error_occurred() const { return error_occurred_; }
-
-  // REQUIRES: called exactly once per iteration of the benchmarking loop.
-  // Set the manually measured time for this benchmark iteration, which
-  // is used instead of automatically measured time if UseManualTime() was
-  // specified.
-  //
-  // For threaded benchmarks the final value will be set to the largest
-  // reported values.
-  void SetIterationTime(double seconds);
-
-  // Set the number of bytes processed by the current benchmark
-  // execution.  This routine is typically called once at the end of a
-  // throughput oriented benchmark.
-  //
-  // REQUIRES: a benchmark has exited its benchmarking loop.
-  BENCHMARK_ALWAYS_INLINE
-  void SetBytesProcessed(int64_t bytes) {
-    counters["bytes_per_second"] =
-        Counter(static_cast<double>(bytes), Counter::kIsRate, Counter::kIs1024);
-  }
-
-  BENCHMARK_ALWAYS_INLINE
-  int64_t bytes_processed() const {
-    if (counters.find("bytes_per_second") != counters.end())
-      return static_cast<int64_t>(counters.at("bytes_per_second"));
-    return 0;
-  }
-
-  // If this routine is called with complexity_n > 0 and complexity report is
-  // requested for the
-  // family benchmark, then current benchmark will be part of the computation
-  // and complexity_n will
-  // represent the length of N.
-  BENCHMARK_ALWAYS_INLINE
-  void SetComplexityN(int64_t complexity_n) { complexity_n_ = complexity_n; }
-
-  BENCHMARK_ALWAYS_INLINE
-  int64_t complexity_length_n() const { return complexity_n_; }
-
-  // If this routine is called with items > 0, then an items/s
-  // label is printed on the benchmark report line for the currently
-  // executing benchmark. It is typically called at the end of a processing
-  // benchmark where a processing items/second output is desired.
-  //
-  // REQUIRES: a benchmark has exited its benchmarking loop.
-  BENCHMARK_ALWAYS_INLINE
-  void SetItemsProcessed(int64_t items) {
-    counters["items_per_second"] =
-        Counter(static_cast<double>(items), benchmark::Counter::kIsRate);
-  }
-
-  BENCHMARK_ALWAYS_INLINE
-  int64_t items_processed() const {
-    if (counters.find("items_per_second") != counters.end())
-      return static_cast<int64_t>(counters.at("items_per_second"));
-    return 0;
-  }
-
-  // If this routine is called, the specified label is printed at the
-  // end of the benchmark report line for the currently executing
-  // benchmark.  Example:
-  //  static void BM_Compress(benchmark::State& state) {
-  //    ...
-  //    double compress = input_size / output_size;
-  //    state.SetLabel(StrFormat("compress:%.1f%%", 100.0*compression));
-  //  }
-  // Produces output that looks like:
-  //  BM_Compress   50         50   14115038  compress:27.3%
-  //
-  // REQUIRES: a benchmark has exited its benchmarking loop.
-  void SetLabel(const char* label);
-
-  void BENCHMARK_ALWAYS_INLINE SetLabel(const std::string& str) {
-    this->SetLabel(str.c_str());
-  }
-
-  // Range arguments for this run. CHECKs if the argument has been set.
-  BENCHMARK_ALWAYS_INLINE
-  int64_t range(std::size_t pos = 0) const {
-    assert(range_.size() > pos);
-    return range_[pos];
-  }
-
-  BENCHMARK_DEPRECATED_MSG("use 'range(0)' instead")
-  int64_t range_x() const { return range(0); }
-
-  BENCHMARK_DEPRECATED_MSG("use 'range(1)' instead")
-  int64_t range_y() const { return range(1); }
-
-  // Number of threads concurrently executing the benchmark.
-  BENCHMARK_ALWAYS_INLINE
-  int threads() const { return threads_; }
-
-  // Index of the executing thread. Values from [0, threads).
-  BENCHMARK_ALWAYS_INLINE
-  int thread_index() const { return thread_index_; }
-
-  BENCHMARK_ALWAYS_INLINE
-  IterationCount iterations() const {
-    if (BENCHMARK_BUILTIN_EXPECT(!started_, false)) {
-      return 0;
-    }
-    return max_iterations - total_iterations_ + batch_leftover_;
-  }
-
- private:
-  // items we expect on the first cache line (ie 64 bytes of the struct)
-  // When total_iterations_ is 0, KeepRunning() and friends will return false.
-  // May be larger than max_iterations.
-  IterationCount total_iterations_;
-
-  // When using KeepRunningBatch(), batch_leftover_ holds the number of
-  // iterations beyond max_iters that were run. Used to track
-  // completed_iterations_ accurately.
-  IterationCount batch_leftover_;
-
- public:
-  const IterationCount max_iterations;
-
- private:
-  bool started_;
-  bool finished_;
-  bool error_occurred_;
-
-  // items we don't need on the first cache line
-  std::vector<int64_t> range_;
-
-  int64_t complexity_n_;
-
- public:
-  // Container for user-defined counters.
-  UserCounters counters;
-
- private:
-  State(IterationCount max_iters, const std::vector<int64_t>& ranges,
-        int thread_i, int n_threads, internal::ThreadTimer* timer,
-        internal::ThreadManager* manager,
-        internal::PerfCountersMeasurement* perf_counters_measurement);
-
-  void StartKeepRunning();
-  // Implementation of KeepRunning() and KeepRunningBatch().
-  // is_batch must be true unless n is 1.
-  bool KeepRunningInternal(IterationCount n, bool is_batch);
-  void FinishKeepRunning();
-
-  const int thread_index_;
-  const int threads_;
-
-  internal::ThreadTimer* const timer_;
-  internal::ThreadManager* const manager_;
-  internal::PerfCountersMeasurement* const perf_counters_measurement_;
-
-  friend class internal::BenchmarkInstance;
-};
-
-inline BENCHMARK_ALWAYS_INLINE bool State::KeepRunning() {
-  return KeepRunningInternal(1, /*is_batch=*/false);
-}
-
-inline BENCHMARK_ALWAYS_INLINE bool State::KeepRunningBatch(IterationCount n) {
-  return KeepRunningInternal(n, /*is_batch=*/true);
-}
-
-inline BENCHMARK_ALWAYS_INLINE bool State::KeepRunningInternal(IterationCount n,
-                                                               bool is_batch) {
-  // total_iterations_ is set to 0 by the constructor, and always set to a
-  // nonzero value by StartKepRunning().
-  assert(n > 0);
-  // n must be 1 unless is_batch is true.
-  assert(is_batch || n == 1);
-  if (BENCHMARK_BUILTIN_EXPECT(total_iterations_ >= n, true)) {
-    total_iterations_ -= n;
-    return true;
-  }
-  if (!started_) {
-    StartKeepRunning();
-    if (!error_occurred_ && total_iterations_ >= n) {
-      total_iterations_ -= n;
-      return true;
-    }
-  }
-  // For non-batch runs, total_iterations_ must be 0 by now.
-  if (is_batch && total_iterations_ != 0) {
-    batch_leftover_ = n - total_iterations_;
-    total_iterations_ = 0;
-    return true;
-  }
-  FinishKeepRunning();
-  return false;
-}
-
-struct State::StateIterator {
-  struct BENCHMARK_UNUSED Value {};
-  typedef std::forward_iterator_tag iterator_category;
-  typedef Value value_type;
-  typedef Value reference;
-  typedef Value pointer;
-  typedef std::ptrdiff_t difference_type;
-
- private:
-  friend class State;
-  BENCHMARK_ALWAYS_INLINE
-  StateIterator() : cached_(0), parent_() {}
-
-  BENCHMARK_ALWAYS_INLINE
-  explicit StateIterator(State* st)
-      : cached_(st->error_occurred_ ? 0 : st->max_iterations), parent_(st) {}
-
- public:
-  BENCHMARK_ALWAYS_INLINE
-  Value operator*() const { return Value(); }
-
-  BENCHMARK_ALWAYS_INLINE
-  StateIterator& operator++() {
-    assert(cached_ > 0);
-    --cached_;
-    return *this;
-  }
-
-  BENCHMARK_ALWAYS_INLINE
-  bool operator!=(StateIterator const&) const {
-    if (BENCHMARK_BUILTIN_EXPECT(cached_ != 0, true)) return true;
-    parent_->FinishKeepRunning();
-    return false;
-  }
-
- private:
-  IterationCount cached_;
-  State* const parent_;
-};
-
-inline BENCHMARK_ALWAYS_INLINE State::StateIterator State::begin() {
-  return StateIterator(this);
-}
-inline BENCHMARK_ALWAYS_INLINE State::StateIterator State::end() {
-  StartKeepRunning();
-  return StateIterator();
-}
-
-namespace internal {
-
-typedef void(Function)(State&);
-
-// ------------------------------------------------------
-// Benchmark registration object.  The BENCHMARK() macro expands
-// into an internal::Benchmark* object.  Various methods can
-// be called on this object to change the properties of the benchmark.
-// Each method returns "this" so that multiple method calls can
-// chained into one expression.
-class Benchmark {
- public:
-  virtual ~Benchmark();
-
-  // Note: the following methods all return "this" so that multiple
-  // method calls can be chained together in one expression.
-
-  // Specify the name of the benchmark
-  Benchmark* Name(const std::string& name);
-
-  // Run this benchmark once with "x" as the extra argument passed
-  // to the function.
-  // REQUIRES: The function passed to the constructor must accept an arg1.
-  Benchmark* Arg(int64_t x);
-
-  // Run this benchmark with the given time unit for the generated output report
-  Benchmark* Unit(TimeUnit unit);
-
-  // Run this benchmark once for a number of values picked from the
-  // range [start..limit].  (start and limit are always picked.)
-  // REQUIRES: The function passed to the constructor must accept an arg1.
-  Benchmark* Range(int64_t start, int64_t limit);
-
-  // Run this benchmark once for all values in the range [start..limit] with
-  // specific step
-  // REQUIRES: The function passed to the constructor must accept an arg1.
-  Benchmark* DenseRange(int64_t start, int64_t limit, int step = 1);
-
-  // Run this benchmark once with "args" as the extra arguments passed
-  // to the function.
-  // REQUIRES: The function passed to the constructor must accept arg1, arg2 ...
-  Benchmark* Args(const std::vector<int64_t>& args);
-
-  // Equivalent to Args({x, y})
-  // NOTE: This is a legacy C++03 interface provided for compatibility only.
-  //   New code should use 'Args'.
-  Benchmark* ArgPair(int64_t x, int64_t y) {
-    std::vector<int64_t> args;
-    args.push_back(x);
-    args.push_back(y);
-    return Args(args);
-  }
-
-  // Run this benchmark once for a number of values picked from the
-  // ranges [start..limit].  (starts and limits are always picked.)
-  // REQUIRES: The function passed to the constructor must accept arg1, arg2 ...
-  Benchmark* Ranges(const std::vector<std::pair<int64_t, int64_t> >& ranges);
-
-  // Run this benchmark once for each combination of values in the (cartesian)
-  // product of the supplied argument lists.
-  // REQUIRES: The function passed to the constructor must accept arg1, arg2 ...
-  Benchmark* ArgsProduct(const std::vector<std::vector<int64_t> >& arglists);
-
-  // Equivalent to ArgNames({name})
-  Benchmark* ArgName(const std::string& name);
-
-  // Set the argument names to display in the benchmark name. If not called,
-  // only argument values will be shown.
-  Benchmark* ArgNames(const std::vector<std::string>& names);
-
-  // Equivalent to Ranges({{lo1, hi1}, {lo2, hi2}}).
-  // NOTE: This is a legacy C++03 interface provided for compatibility only.
-  //   New code should use 'Ranges'.
-  Benchmark* RangePair(int64_t lo1, int64_t hi1, int64_t lo2, int64_t hi2) {
-    std::vector<std::pair<int64_t, int64_t> > ranges;
-    ranges.push_back(std::make_pair(lo1, hi1));
-    ranges.push_back(std::make_pair(lo2, hi2));
-    return Ranges(ranges);
-  }
-
-  // Have "setup" and/or "teardown" invoked once for every benchmark run.
-  // If the benchmark is multi-threaded (will run in k threads concurrently),
-  // the setup callback will be be invoked exactly once (not k times) before
-  // each run with k threads. Time allowing (e.g. for a short benchmark), there
-  // may be multiple such runs per benchmark, each run with its own
-  // "setup"/"teardown".
-  //
-  // If the benchmark uses different size groups of threads (e.g. via
-  // ThreadRange), the above will be true for each size group.
-  //
-  // The callback will be passed a State object, which includes the number
-  // of threads, thread-index, benchmark arguments, etc.
-  //
-  // The callback must not be NULL or self-deleting.
-  Benchmark* Setup(void (*setup)(const benchmark::State&));
-  Benchmark* Teardown(void (*teardown)(const benchmark::State&));
-
-  // Pass this benchmark object to *func, which can customize
-  // the benchmark by calling various methods like Arg, Args,
-  // Threads, etc.
-  Benchmark* Apply(void (*func)(Benchmark* benchmark));
-
-  // Set the range multiplier for non-dense range. If not called, the range
-  // multiplier kRangeMultiplier will be used.
-  Benchmark* RangeMultiplier(int multiplier);
-
-  // Set the minimum amount of time to use when running this benchmark. This
-  // option overrides the `benchmark_min_time` flag.
-  // REQUIRES: `t > 0` and `Iterations` has not been called on this benchmark.
-  Benchmark* MinTime(double t);
-
-  // Specify the amount of iterations that should be run by this benchmark.
-  // REQUIRES: 'n > 0' and `MinTime` has not been called on this benchmark.
-  //
-  // NOTE: This function should only be used when *exact* iteration control is
-  //   needed and never to control or limit how long a benchmark runs, where
-  // `--benchmark_min_time=N` or `MinTime(...)` should be used instead.
-  Benchmark* Iterations(IterationCount n);
-
-  // Specify the amount of times to repeat this benchmark. This option overrides
-  // the `benchmark_repetitions` flag.
-  // REQUIRES: `n > 0`
-  Benchmark* Repetitions(int n);
-
-  // Specify if each repetition of the benchmark should be reported separately
-  // or if only the final statistics should be reported. If the benchmark
-  // is not repeated then the single result is always reported.
-  // Applies to *ALL* reporters (display and file).
-  Benchmark* ReportAggregatesOnly(bool value = true);
-
-  // Same as ReportAggregatesOnly(), but applies to display reporter only.
-  Benchmark* DisplayAggregatesOnly(bool value = true);
-
-  // By default, the CPU time is measured only for the main thread, which may
-  // be unrepresentative if the benchmark uses threads internally. If called,
-  // the total CPU time spent by all the threads will be measured instead.
-  // By default, the only the main thread CPU time will be measured.
-  Benchmark* MeasureProcessCPUTime();
-
-  // If a particular benchmark should use the Wall clock instead of the CPU time
-  // (be it either the CPU time of the main thread only (default), or the
-  // total CPU usage of the benchmark), call this method. If called, the elapsed
-  // (wall) time will be used to control how many iterations are run, and in the
-  // printing of items/second or MB/seconds values.
-  // If not called, the CPU time used by the benchmark will be used.
-  Benchmark* UseRealTime();
-
-  // If a benchmark must measure time manually (e.g. if GPU execution time is
-  // being
-  // measured), call this method. If called, each benchmark iteration should
-  // call
-  // SetIterationTime(seconds) to report the measured time, which will be used
-  // to control how many iterations are run, and in the printing of items/second
-  // or MB/second values.
-  Benchmark* UseManualTime();
-
-  // Set the asymptotic computational complexity for the benchmark. If called
-  // the asymptotic computational complexity will be shown on the output.
-  Benchmark* Complexity(BigO complexity = benchmark::oAuto);
-
-  // Set the asymptotic computational complexity for the benchmark. If called
-  // the asymptotic computational complexity will be shown on the output.
-  Benchmark* Complexity(BigOFunc* complexity);
-
-  // Add this statistics to be computed over all the values of benchmark run
-  Benchmark* ComputeStatistics(const std::string& name,
-                               StatisticsFunc* statistics,
-                               StatisticUnit unit = kTime);
-
-  // Support for running multiple copies of the same benchmark concurrently
-  // in multiple threads.  This may be useful when measuring the scaling
-  // of some piece of code.
-
-  // Run one instance of this benchmark concurrently in t threads.
-  Benchmark* Threads(int t);
-
-  // Pick a set of values T from [min_threads,max_threads].
-  // min_threads and max_threads are always included in T.  Run this
-  // benchmark once for each value in T.  The benchmark run for a
-  // particular value t consists of t threads running the benchmark
-  // function concurrently.  For example, consider:
-  //    BENCHMARK(Foo)->ThreadRange(1,16);
-  // This will run the following benchmarks:
-  //    Foo in 1 thread
-  //    Foo in 2 threads
-  //    Foo in 4 threads
-  //    Foo in 8 threads
-  //    Foo in 16 threads
-  Benchmark* ThreadRange(int min_threads, int max_threads);
-
-  // For each value n in the range, run this benchmark once using n threads.
-  // min_threads and max_threads are always included in the range.
-  // stride specifies the increment. E.g. DenseThreadRange(1, 8, 3) starts
-  // a benchmark with 1, 4, 7 and 8 threads.
-  Benchmark* DenseThreadRange(int min_threads, int max_threads, int stride = 1);
-
-  // Equivalent to ThreadRange(NumCPUs(), NumCPUs())
-  Benchmark* ThreadPerCpu();
-
-  virtual void Run(State& state) = 0;
-
- protected:
-  explicit Benchmark(const char* name);
-  Benchmark(Benchmark const&);
-  void SetName(const char* name);
-
-  int ArgsCnt() const;
-
- private:
-  friend class BenchmarkFamilies;
-  friend class BenchmarkInstance;
-
-  std::string name_;
-  AggregationReportMode aggregation_report_mode_;
-  std::vector<std::string> arg_names_;       // Args for all benchmark runs
-  std::vector<std::vector<int64_t> > args_;  // Args for all benchmark runs
-  TimeUnit time_unit_;
-  int range_multiplier_;
-  double min_time_;
-  IterationCount iterations_;
-  int repetitions_;
-  bool measure_process_cpu_time_;
-  bool use_real_time_;
-  bool use_manual_time_;
-  BigO complexity_;
-  BigOFunc* complexity_lambda_;
-  std::vector<Statistics> statistics_;
-  std::vector<int> thread_counts_;
-
-  typedef void (*callback_function)(const benchmark::State&);
-  callback_function setup_;
-  callback_function teardown_;
-
-  Benchmark& operator=(Benchmark const&);
-};
-
-}  // namespace internal
-
-// Create and register a benchmark with the specified 'name' that invokes
-// the specified functor 'fn'.
-//
-// RETURNS: A pointer to the registered benchmark.
-internal::Benchmark* RegisterBenchmark(const char* name,
-                                       internal::Function* fn);
-
-#if defined(BENCHMARK_HAS_CXX11)
-template <class Lambda>
-internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn);
-#endif
-
-// Remove all registered benchmarks. All pointers to previously registered
-// benchmarks are invalidated.
-void ClearRegisteredBenchmarks();
-
-namespace internal {
-// The class used to hold all Benchmarks created from static function.
-// (ie those created using the BENCHMARK(...) macros.
-class FunctionBenchmark : public Benchmark {
- public:
-  FunctionBenchmark(const char* name, Function* func)
-      : Benchmark(name), func_(func) {}
-
-  virtual void Run(State& st) BENCHMARK_OVERRIDE;
-
- private:
-  Function* func_;
-};
-
-#ifdef BENCHMARK_HAS_CXX11
-template <class Lambda>
-class LambdaBenchmark : public Benchmark {
- public:
-  virtual void Run(State& st) BENCHMARK_OVERRIDE { lambda_(st); }
-
- private:
-  template <class OLambda>
-  LambdaBenchmark(const char* name, OLambda&& lam)
-      : Benchmark(name), lambda_(std::forward<OLambda>(lam)) {}
-
-  LambdaBenchmark(LambdaBenchmark const&) = delete;
-
-  template <class Lam>  // NOLINTNEXTLINE(readability-redundant-declaration)
-  friend Benchmark* ::benchmark::RegisterBenchmark(const char*, Lam&&);
-
-  Lambda lambda_;
-};
-#endif
-
-}  // namespace internal
-
-inline internal::Benchmark* RegisterBenchmark(const char* name,
-                                              internal::Function* fn) {
-  return internal::RegisterBenchmarkInternal(
-      ::new internal::FunctionBenchmark(name, fn));
-}
-
-#ifdef BENCHMARK_HAS_CXX11
-template <class Lambda>
-internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn) {
-  using BenchType =
-      internal::LambdaBenchmark<typename std::decay<Lambda>::type>;
-  return internal::RegisterBenchmarkInternal(
-      ::new BenchType(name, std::forward<Lambda>(fn)));
-}
-#endif
-
-#if defined(BENCHMARK_HAS_CXX11) && \
-    (!defined(BENCHMARK_GCC_VERSION) || BENCHMARK_GCC_VERSION >= 409)
-template <class Lambda, class... Args>
-internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn,
-                                       Args&&... args) {
-  return benchmark::RegisterBenchmark(
-      name, [=](benchmark::State& st) { fn(st, args...); });
-}
-#else
-#define BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
-#endif
-
-// The base class for all fixture tests.
-class Fixture : public internal::Benchmark {
- public:
-  Fixture() : internal::Benchmark("") {}
-
-  virtual void Run(State& st) BENCHMARK_OVERRIDE {
-    this->SetUp(st);
-    this->BenchmarkCase(st);
-    this->TearDown(st);
-  }
-
-  // These will be deprecated ...
-  virtual void SetUp(const State&) {}
-  virtual void TearDown(const State&) {}
-  // ... In favor of these.
-  virtual void SetUp(State& st) { SetUp(const_cast<const State&>(st)); }
-  virtual void TearDown(State& st) { TearDown(const_cast<const State&>(st)); }
-
- protected:
-  virtual void BenchmarkCase(State&) = 0;
-};
-
-}  // namespace benchmark
-
-// ------------------------------------------------------
-// Macro to register benchmarks
-
-// Check that __COUNTER__ is defined and that __COUNTER__ increases by 1
-// every time it is expanded. X + 1 == X + 0 is used in case X is defined to be
-// empty. If X is empty the expression becomes (+1 == +0).
-#if defined(__COUNTER__) && (__COUNTER__ + 1 == __COUNTER__ + 0)
-#define BENCHMARK_PRIVATE_UNIQUE_ID __COUNTER__
-#else
-#define BENCHMARK_PRIVATE_UNIQUE_ID __LINE__
-#endif
-
-// Helpers for generating unique variable names
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_PRIVATE_NAME(...)                                      \
-  BENCHMARK_PRIVATE_CONCAT(benchmark_uniq_, BENCHMARK_PRIVATE_UNIQUE_ID, \
-                           __VA_ARGS__)
-#else
-#define BENCHMARK_PRIVATE_NAME(n) \
-  BENCHMARK_PRIVATE_CONCAT(benchmark_uniq_, BENCHMARK_PRIVATE_UNIQUE_ID, n)
-#endif  // BENCHMARK_HAS_CXX11
-
-#define BENCHMARK_PRIVATE_CONCAT(a, b, c) BENCHMARK_PRIVATE_CONCAT2(a, b, c)
-#define BENCHMARK_PRIVATE_CONCAT2(a, b, c) a##b##c
-// Helper for concatenation with macro name expansion
-#define BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method) \
-  BaseClass##_##Method##_Benchmark
-
-#define BENCHMARK_PRIVATE_DECLARE(n)                                 \
-  static ::benchmark::internal::Benchmark* BENCHMARK_PRIVATE_NAME(n) \
-      BENCHMARK_UNUSED
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK(...)                                               \
-  BENCHMARK_PRIVATE_DECLARE(_benchmark_) =                           \
-      (::benchmark::internal::RegisterBenchmarkInternal(             \
-          new ::benchmark::internal::FunctionBenchmark(#__VA_ARGS__, \
-                                                       &__VA_ARGS__)))
-#else
-#define BENCHMARK(n)                                     \
-  BENCHMARK_PRIVATE_DECLARE(n) =                         \
-      (::benchmark::internal::RegisterBenchmarkInternal( \
-          new ::benchmark::internal::FunctionBenchmark(#n, n)))
-#endif  // BENCHMARK_HAS_CXX11
-
-// Old-style macros
-#define BENCHMARK_WITH_ARG(n, a) BENCHMARK(n)->Arg((a))
-#define BENCHMARK_WITH_ARG2(n, a1, a2) BENCHMARK(n)->Args({(a1), (a2)})
-#define BENCHMARK_WITH_UNIT(n, t) BENCHMARK(n)->Unit((t))
-#define BENCHMARK_RANGE(n, lo, hi) BENCHMARK(n)->Range((lo), (hi))
-#define BENCHMARK_RANGE2(n, l1, h1, l2, h2) \
-  BENCHMARK(n)->RangePair({{(l1), (h1)}, {(l2), (h2)}})
-
-#ifdef BENCHMARK_HAS_CXX11
-
-// Register a benchmark which invokes the function specified by `func`
-// with the additional arguments specified by `...`.
-//
-// For example:
-//
-// template <class ...ExtraArgs>`
-// void BM_takes_args(benchmark::State& state, ExtraArgs&&... extra_args) {
-//  [...]
-//}
-// /* Registers a benchmark named "BM_takes_args/int_string_test` */
-// BENCHMARK_CAPTURE(BM_takes_args, int_string_test, 42, std::string("abc"));
-#define BENCHMARK_CAPTURE(func, test_case_name, ...)     \
-  BENCHMARK_PRIVATE_DECLARE(func) =                      \
-      (::benchmark::internal::RegisterBenchmarkInternal( \
-          new ::benchmark::internal::FunctionBenchmark(  \
-              #func "/" #test_case_name,                 \
-              [](::benchmark::State& st) { func(st, __VA_ARGS__); })))
-
-#endif  // BENCHMARK_HAS_CXX11
-
-// This will register a benchmark for a templatized function.  For example:
-//
-// template<int arg>
-// void BM_Foo(int iters);
-//
-// BENCHMARK_TEMPLATE(BM_Foo, 1);
-//
-// will register BM_Foo<1> as a benchmark.
-#define BENCHMARK_TEMPLATE1(n, a)                        \
-  BENCHMARK_PRIVATE_DECLARE(n) =                         \
-      (::benchmark::internal::RegisterBenchmarkInternal( \
-          new ::benchmark::internal::FunctionBenchmark(#n "<" #a ">", n<a>)))
-
-#define BENCHMARK_TEMPLATE2(n, a, b)                                         \
-  BENCHMARK_PRIVATE_DECLARE(n) =                                             \
-      (::benchmark::internal::RegisterBenchmarkInternal(                     \
-          new ::benchmark::internal::FunctionBenchmark(#n "<" #a "," #b ">", \
-                                                       n<a, b>)))
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE(n, ...)                       \
-  BENCHMARK_PRIVATE_DECLARE(n) =                         \
-      (::benchmark::internal::RegisterBenchmarkInternal( \
-          new ::benchmark::internal::FunctionBenchmark(  \
-              #n "<" #__VA_ARGS__ ">", n<__VA_ARGS__>)))
-#else
-#define BENCHMARK_TEMPLATE(n, a) BENCHMARK_TEMPLATE1(n, a)
-#endif
-
-#define BENCHMARK_PRIVATE_DECLARE_F(BaseClass, Method)                  \
-  class BaseClass##_##Method##_Benchmark : public BaseClass {           \
-   public:                                                              \
-    BaseClass##_##Method##_Benchmark() {                                \
-      this->SetName(#BaseClass "/" #Method);                            \
-    }                                                                   \
-                                                                        \
-   protected:                                                           \
-    virtual void BenchmarkCase(::benchmark::State&) BENCHMARK_OVERRIDE; \
-  };
-
-#define BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(BaseClass, Method, a)     \
-  class BaseClass##_##Method##_Benchmark : public BaseClass<a> {        \
-   public:                                                              \
-    BaseClass##_##Method##_Benchmark() {                                \
-      this->SetName(#BaseClass "<" #a ">/" #Method);                    \
-    }                                                                   \
-                                                                        \
-   protected:                                                           \
-    virtual void BenchmarkCase(::benchmark::State&) BENCHMARK_OVERRIDE; \
-  };
-
-#define BENCHMARK_TEMPLATE2_PRIVATE_DECLARE_F(BaseClass, Method, a, b)  \
-  class BaseClass##_##Method##_Benchmark : public BaseClass<a, b> {     \
-   public:                                                              \
-    BaseClass##_##Method##_Benchmark() {                                \
-      this->SetName(#BaseClass "<" #a "," #b ">/" #Method);             \
-    }                                                                   \
-                                                                        \
-   protected:                                                           \
-    virtual void BenchmarkCase(::benchmark::State&) BENCHMARK_OVERRIDE; \
-  };
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(BaseClass, Method, ...)       \
-  class BaseClass##_##Method##_Benchmark : public BaseClass<__VA_ARGS__> { \
-   public:                                                                 \
-    BaseClass##_##Method##_Benchmark() {                                   \
-      this->SetName(#BaseClass "<" #__VA_ARGS__ ">/" #Method);             \
-    }                                                                      \
-                                                                           \
-   protected:                                                              \
-    virtual void BenchmarkCase(::benchmark::State&) BENCHMARK_OVERRIDE;    \
-  };
-#else
-#define BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(n, a) \
-  BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(n, a)
-#endif
-
-#define BENCHMARK_DEFINE_F(BaseClass, Method)    \
-  BENCHMARK_PRIVATE_DECLARE_F(BaseClass, Method) \
-  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
-
-#define BENCHMARK_TEMPLATE1_DEFINE_F(BaseClass, Method, a)    \
-  BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(BaseClass, Method, a) \
-  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
-
-#define BENCHMARK_TEMPLATE2_DEFINE_F(BaseClass, Method, a, b)    \
-  BENCHMARK_TEMPLATE2_PRIVATE_DECLARE_F(BaseClass, Method, a, b) \
-  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE_DEFINE_F(BaseClass, Method, ...)            \
-  BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(BaseClass, Method, __VA_ARGS__) \
-  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
-#else
-#define BENCHMARK_TEMPLATE_DEFINE_F(BaseClass, Method, a) \
-  BENCHMARK_TEMPLATE1_DEFINE_F(BaseClass, Method, a)
-#endif
-
-#define BENCHMARK_REGISTER_F(BaseClass, Method) \
-  BENCHMARK_PRIVATE_REGISTER_F(BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method))
-
-#define BENCHMARK_PRIVATE_REGISTER_F(TestName) \
-  BENCHMARK_PRIVATE_DECLARE(TestName) =        \
-      (::benchmark::internal::RegisterBenchmarkInternal(new TestName()))
-
-// This macro will define and register a benchmark within a fixture class.
-#define BENCHMARK_F(BaseClass, Method)           \
-  BENCHMARK_PRIVATE_DECLARE_F(BaseClass, Method) \
-  BENCHMARK_REGISTER_F(BaseClass, Method);       \
-  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
-
-#define BENCHMARK_TEMPLATE1_F(BaseClass, Method, a)           \
-  BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(BaseClass, Method, a) \
-  BENCHMARK_REGISTER_F(BaseClass, Method);                    \
-  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
-
-#define BENCHMARK_TEMPLATE2_F(BaseClass, Method, a, b)           \
-  BENCHMARK_TEMPLATE2_PRIVATE_DECLARE_F(BaseClass, Method, a, b) \
-  BENCHMARK_REGISTER_F(BaseClass, Method);                       \
-  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE_F(BaseClass, Method, ...)                   \
-  BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(BaseClass, Method, __VA_ARGS__) \
-  BENCHMARK_REGISTER_F(BaseClass, Method);                             \
-  void BENCHMARK_PRIVATE_CONCAT_NAME(BaseClass, Method)::BenchmarkCase
-#else
-#define BENCHMARK_TEMPLATE_F(BaseClass, Method, a) \
-  BENCHMARK_TEMPLATE1_F(BaseClass, Method, a)
-#endif
-
-// Helper macro to create a main routine in a test that runs the benchmarks
-#define BENCHMARK_MAIN()                                                \
-  int main(int argc, char** argv) {                                     \
-    ::benchmark::Initialize(&argc, argv);                               \
-    if (::benchmark::ReportUnrecognizedArguments(argc, argv)) return 1; \
-    ::benchmark::RunSpecifiedBenchmarks();                              \
-    ::benchmark::Shutdown();                                            \
-    return 0;                                                           \
-  }                                                                     \
-  int main(int, char**)
-
-// ------------------------------------------------------
-// Benchmark Reporters
-
-namespace benchmark {
-
-struct CPUInfo {
-  struct CacheInfo {
-    std::string type;
-    int level;
-    int size;
-    int num_sharing;
-  };
-
-  enum Scaling { UNKNOWN, ENABLED, DISABLED };
-
-  int num_cpus;
-  Scaling scaling;
-  double cycles_per_second;
-  std::vector<CacheInfo> caches;
-  std::vector<double> load_avg;
-
-  static const CPUInfo& Get();
-
- private:
-  CPUInfo();
-  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(CPUInfo);
-};
-
-// Adding Struct for System Information
-struct SystemInfo {
-  std::string name;
-  static const SystemInfo& Get();
-
- private:
-  SystemInfo();
-  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(SystemInfo);
-};
-
-// BenchmarkName contains the components of the Benchmark's name
-// which allows individual fields to be modified or cleared before
-// building the final name using 'str()'.
-struct BenchmarkName {
-  std::string function_name;
-  std::string args;
-  std::string min_time;
-  std::string iterations;
-  std::string repetitions;
-  std::string time_type;
-  std::string threads;
-
-  // Return the full name of the benchmark with each non-empty
-  // field separated by a '/'
-  std::string str() const;
-};
-
-// Interface for custom benchmark result printers.
-// By default, benchmark reports are printed to stdout. However an application
-// can control the destination of the reports by calling
-// RunSpecifiedBenchmarks and passing it a custom reporter object.
-// The reporter object must implement the following interface.
-class BenchmarkReporter {
- public:
-  struct Context {
-    CPUInfo const& cpu_info;
-    SystemInfo const& sys_info;
-    // The number of chars in the longest benchmark name.
-    size_t name_field_width;
-    static const char* executable_name;
-    Context();
-  };
-
-  struct Run {
-    static const int64_t no_repetition_index = -1;
-    enum RunType { RT_Iteration, RT_Aggregate };
-
-    Run()
-        : run_type(RT_Iteration),
-          aggregate_unit(kTime),
-          error_occurred(false),
-          iterations(1),
-          threads(1),
-          time_unit(kNanosecond),
-          real_accumulated_time(0),
-          cpu_accumulated_time(0),
-          max_heapbytes_used(0),
-          complexity(oNone),
-          complexity_lambda(),
-          complexity_n(0),
-          report_big_o(false),
-          report_rms(false),
-          memory_result(NULL),
-          allocs_per_iter(0.0) {}
-
-    std::string benchmark_name() const;
-    BenchmarkName run_name;
-    int64_t family_index;
-    int64_t per_family_instance_index;
-    RunType run_type;
-    std::string aggregate_name;
-    StatisticUnit aggregate_unit;
-    std::string report_label;  // Empty if not set by benchmark.
-    bool error_occurred;
-    std::string error_message;
-
-    IterationCount iterations;
-    int64_t threads;
-    int64_t repetition_index;
-    int64_t repetitions;
-    TimeUnit time_unit;
-    double real_accumulated_time;
-    double cpu_accumulated_time;
-
-    // Return a value representing the real time per iteration in the unit
-    // specified by 'time_unit'.
-    // NOTE: If 'iterations' is zero the returned value represents the
-    // accumulated time.
-    double GetAdjustedRealTime() const;
-
-    // Return a value representing the cpu time per iteration in the unit
-    // specified by 'time_unit'.
-    // NOTE: If 'iterations' is zero the returned value represents the
-    // accumulated time.
-    double GetAdjustedCPUTime() const;
-
-    // This is set to 0.0 if memory tracing is not enabled.
-    double max_heapbytes_used;
-
-    // Keep track of arguments to compute asymptotic complexity
-    BigO complexity;
-    BigOFunc* complexity_lambda;
-    int64_t complexity_n;
-
-    // what statistics to compute from the measurements
-    const std::vector<internal::Statistics>* statistics;
-
-    // Inform print function whether the current run is a complexity report
-    bool report_big_o;
-    bool report_rms;
-
-    UserCounters counters;
-
-    // Memory metrics.
-    const MemoryManager::Result* memory_result;
-    double allocs_per_iter;
-  };
-
-  struct PerFamilyRunReports {
-    PerFamilyRunReports() : num_runs_total(0), num_runs_done(0) {}
-
-    // How many runs will all instances of this benchmark perform?
-    int num_runs_total;
-
-    // How many runs have happened already?
-    int num_runs_done;
-
-    // The reports about (non-errneous!) runs of this family.
-    std::vector<BenchmarkReporter::Run> Runs;
-  };
-
-  // Construct a BenchmarkReporter with the output stream set to 'std::cout'
-  // and the error stream set to 'std::cerr'
-  BenchmarkReporter();
-
-  // Called once for every suite of benchmarks run.
-  // The parameter "context" contains information that the
-  // reporter may wish to use when generating its report, for example the
-  // platform under which the benchmarks are running. The benchmark run is
-  // never started if this function returns false, allowing the reporter
-  // to skip runs based on the context information.
-  virtual bool ReportContext(const Context& context) = 0;
-
-  // Called once for each group of benchmark runs, gives information about
-  // cpu-time and heap memory usage during the benchmark run. If the group
-  // of runs contained more than two entries then 'report' contains additional
-  // elements representing the mean and standard deviation of those runs.
-  // Additionally if this group of runs was the last in a family of benchmarks
-  // 'reports' contains additional entries representing the asymptotic
-  // complexity and RMS of that benchmark family.
-  virtual void ReportRuns(const std::vector<Run>& report) = 0;
-
-  // Called once and only once after ever group of benchmarks is run and
-  // reported.
-  virtual void Finalize() {}
-
-  // REQUIRES: The object referenced by 'out' is valid for the lifetime
-  // of the reporter.
-  void SetOutputStream(std::ostream* out) {
-    assert(out);
-    output_stream_ = out;
-  }
-
-  // REQUIRES: The object referenced by 'err' is valid for the lifetime
-  // of the reporter.
-  void SetErrorStream(std::ostream* err) {
-    assert(err);
-    error_stream_ = err;
-  }
-
-  std::ostream& GetOutputStream() const { return *output_stream_; }
-
-  std::ostream& GetErrorStream() const { return *error_stream_; }
-
-  virtual ~BenchmarkReporter();
-
-  // Write a human readable string to 'out' representing the specified
-  // 'context'.
-  // REQUIRES: 'out' is non-null.
-  static void PrintBasicContext(std::ostream* out, Context const& context);
-
- private:
-  std::ostream* output_stream_;
-  std::ostream* error_stream_;
-};
-
-// Simple reporter that outputs benchmark data to the console. This is the
-// default reporter used by RunSpecifiedBenchmarks().
-class ConsoleReporter : public BenchmarkReporter {
- public:
-  enum OutputOptions {
-    OO_None = 0,
-    OO_Color = 1,
-    OO_Tabular = 2,
-    OO_ColorTabular = OO_Color | OO_Tabular,
-    OO_Defaults = OO_ColorTabular
-  };
-  explicit ConsoleReporter(OutputOptions opts_ = OO_Defaults)
-      : output_options_(opts_), name_field_width_(0), printed_header_(false) {}
-
-  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE;
-  virtual void ReportRuns(const std::vector<Run>& reports) BENCHMARK_OVERRIDE;
-
- protected:
-  virtual void PrintRunData(const Run& report);
-  virtual void PrintHeader(const Run& report);
-
-  OutputOptions output_options_;
-  size_t name_field_width_;
-  UserCounters prev_counters_;
-  bool printed_header_;
-};
-
-class JSONReporter : public BenchmarkReporter {
- public:
-  JSONReporter() : first_report_(true) {}
-  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE;
-  virtual void ReportRuns(const std::vector<Run>& reports) BENCHMARK_OVERRIDE;
-  virtual void Finalize() BENCHMARK_OVERRIDE;
-
- private:
-  void PrintRunData(const Run& report);
-
-  bool first_report_;
-};
-
-class BENCHMARK_DEPRECATED_MSG(
-    "The CSV Reporter will be removed in a future release") CSVReporter
-    : public BenchmarkReporter {
- public:
-  CSVReporter() : printed_header_(false) {}
-  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE;
-  virtual void ReportRuns(const std::vector<Run>& reports) BENCHMARK_OVERRIDE;
-
- private:
-  void PrintRunData(const Run& report);
-
-  bool printed_header_;
-  std::set<std::string> user_counter_names_;
-};
-
-inline const char* GetTimeUnitString(TimeUnit unit) {
-  switch (unit) {
-    case kSecond:
-      return "s";
-    case kMillisecond:
-      return "ms";
-    case kMicrosecond:
-      return "us";
-    case kNanosecond:
-      return "ns";
-  }
-  BENCHMARK_UNREACHABLE();
-}
-
-inline double GetTimeUnitMultiplier(TimeUnit unit) {
-  switch (unit) {
-    case kSecond:
-      return 1;
-    case kMillisecond:
-      return 1e3;
-    case kMicrosecond:
-      return 1e6;
-    case kNanosecond:
-      return 1e9;
-  }
-  BENCHMARK_UNREACHABLE();
-}
-
-// Creates a list of integer values for the given range and multiplier.
-// This can be used together with ArgsProduct() to allow multiple ranges
-// with different multiplers.
-// Example:
-// ArgsProduct({
-//   CreateRange(0, 1024, /*multi=*/32),
-//   CreateRange(0, 100, /*multi=*/4),
-//   CreateDenseRange(0, 4, /*step=*/1),
-// });
-std::vector<int64_t> CreateRange(int64_t lo, int64_t hi, int multi);
-
-// Creates a list of integer values for the given range and step.
-std::vector<int64_t> CreateDenseRange(int64_t start, int64_t limit, int step);
-
-}  // namespace benchmark
-
-#endif  // BENCHMARK_BENCHMARK_H_
diff --git a/3rdparty/benchmark/requirements.txt b/3rdparty/benchmark/requirements.txt
deleted file mode 100644
index e451894e..00000000
--- a/3rdparty/benchmark/requirements.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-numpy == 1.19.4
-scipy == 1.5.4
-pandas == 1.1.5
diff --git a/3rdparty/benchmark/setup.py b/3rdparty/benchmark/setup.py
deleted file mode 100644
index 4eaccf84..00000000
--- a/3rdparty/benchmark/setup.py
+++ /dev/null
@@ -1,143 +0,0 @@
-import os
-import posixpath
-import platform
-import re
-import shutil
-import sys
-
-from distutils import sysconfig
-import setuptools
-from setuptools.command import build_ext
-
-
-HERE = os.path.dirname(os.path.abspath(__file__))
-
-
-IS_WINDOWS = sys.platform.startswith("win")
-
-
-def _get_version():
-    """Parse the version string from __init__.py."""
-    with open(
-        os.path.join(HERE, "bindings", "python", "google_benchmark", "__init__.py")
-    ) as init_file:
-        try:
-            version_line = next(
-                line for line in init_file if line.startswith("__version__")
-            )
-        except StopIteration:
-            raise ValueError("__version__ not defined in __init__.py")
-        else:
-            namespace = {}
-            exec(version_line, namespace)  # pylint: disable=exec-used
-            return namespace["__version__"]
-
-
-def _parse_requirements(path):
-    with open(os.path.join(HERE, path)) as requirements:
-        return [
-            line.rstrip()
-            for line in requirements
-            if not (line.isspace() or line.startswith("#"))
-        ]
-
-
-class BazelExtension(setuptools.Extension):
-    """A C/C++ extension that is defined as a Bazel BUILD target."""
-
-    def __init__(self, name, bazel_target):
-        self.bazel_target = bazel_target
-        self.relpath, self.target_name = posixpath.relpath(bazel_target, "//").split(
-            ":"
-        )
-        setuptools.Extension.__init__(self, name, sources=[])
-
-
-class BuildBazelExtension(build_ext.build_ext):
-    """A command that runs Bazel to build a C/C++ extension."""
-
-    def run(self):
-        for ext in self.extensions:
-            self.bazel_build(ext)
-        build_ext.build_ext.run(self)
-
-    def bazel_build(self, ext):
-        """Runs the bazel build to create the package."""
-        with open("WORKSPACE", "r") as workspace:
-            workspace_contents = workspace.read()
-
-        with open("WORKSPACE", "w") as workspace:
-            workspace.write(
-                re.sub(
-                    r'(?<=path = ").*(?=",  # May be overwritten by setup\.py\.)',
-                    sysconfig.get_python_inc().replace(os.path.sep, posixpath.sep),
-                    workspace_contents,
-                )
-            )
-
-        if not os.path.exists(self.build_temp):
-            os.makedirs(self.build_temp)
-
-        bazel_argv = [
-            "bazel",
-            "build",
-            ext.bazel_target,
-            "--symlink_prefix=" + os.path.join(self.build_temp, "bazel-"),
-            "--compilation_mode=" + ("dbg" if self.debug else "opt"),
-        ]
-
-        if IS_WINDOWS:
-            # Link with python*.lib.
-            for library_dir in self.library_dirs:
-                bazel_argv.append("--linkopt=/LIBPATH:" + library_dir)
-        elif sys.platform == "darwin" and platform.machine() == "x86_64":
-            bazel_argv.append("--macos_minimum_os=10.9")
-
-        self.spawn(bazel_argv)
-
-        shared_lib_suffix = '.dll' if IS_WINDOWS else '.so'
-        ext_bazel_bin_path = os.path.join(
-            self.build_temp, 'bazel-bin',
-            ext.relpath, ext.target_name + shared_lib_suffix)
-
-        ext_dest_path = self.get_ext_fullpath(ext.name)
-        ext_dest_dir = os.path.dirname(ext_dest_path)
-        if not os.path.exists(ext_dest_dir):
-            os.makedirs(ext_dest_dir)
-        shutil.copyfile(ext_bazel_bin_path, ext_dest_path)
-
-
-setuptools.setup(
-    name="google_benchmark",
-    version=_get_version(),
-    url="https://github.com/google/benchmark",
-    description="A library to benchmark code snippets.",
-    author="Google",
-    author_email="benchmark-py@google.com",
-    # Contained modules and scripts.
-    package_dir={"": "bindings/python"},
-    packages=setuptools.find_packages("bindings/python"),
-    install_requires=_parse_requirements("bindings/python/requirements.txt"),
-    cmdclass=dict(build_ext=BuildBazelExtension),
-    ext_modules=[
-        BazelExtension(
-            "google_benchmark._benchmark",
-            "//bindings/python/google_benchmark:_benchmark",
-        )
-    ],
-    zip_safe=False,
-    # PyPI package information.
-    classifiers=[
-        "Development Status :: 4 - Beta",
-        "Intended Audience :: Developers",
-        "Intended Audience :: Science/Research",
-        "License :: OSI Approved :: Apache Software License",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Topic :: Software Development :: Testing",
-        "Topic :: System :: Benchmark",
-    ],
-    license="Apache 2.0",
-    keywords="benchmark",
-)
diff --git a/3rdparty/benchmark/src/CMakeLists.txt b/3rdparty/benchmark/src/CMakeLists.txt
deleted file mode 100644
index e814a4e0..00000000
--- a/3rdparty/benchmark/src/CMakeLists.txt
+++ /dev/null
@@ -1,159 +0,0 @@
-# Allow the source files to find headers in src/
-include(GNUInstallDirs)
-include_directories(${PROJECT_SOURCE_DIR}/src)
-
-if (DEFINED BENCHMARK_CXX_LINKER_FLAGS)
-  list(APPEND CMAKE_SHARED_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
-  list(APPEND CMAKE_MODULE_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
-endif()
-
-file(GLOB
-  SOURCE_FILES
-    *.cc
-    ${PROJECT_SOURCE_DIR}/include/benchmark/*.h
-    ${CMAKE_CURRENT_SOURCE_DIR}/*.h)
-file(GLOB BENCHMARK_MAIN "benchmark_main.cc")
-foreach(item ${BENCHMARK_MAIN})
-  list(REMOVE_ITEM SOURCE_FILES "${item}")
-endforeach()
-
-add_library(benchmark ${SOURCE_FILES})
-add_library(benchmark::benchmark ALIAS benchmark)
-set_target_properties(benchmark PROPERTIES
-  OUTPUT_NAME "benchmark"
-  VERSION ${GENERIC_LIB_VERSION}
-  SOVERSION ${GENERIC_LIB_SOVERSION}
-)
-target_include_directories(benchmark PUBLIC
-  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>)
-
-# libpfm, if available
-if (HAVE_LIBPFM)
-  target_link_libraries(benchmark PRIVATE pfm)
-  add_definitions(-DHAVE_LIBPFM)
-endif()
-
-# Link threads.
-target_link_libraries(benchmark PRIVATE Threads::Threads)
-
-target_link_libraries(benchmark PRIVATE ${BENCHMARK_CXX_LIBRARIES})
-
-if(HAVE_LIB_RT)
-  target_link_libraries(benchmark PRIVATE rt)
-endif(HAVE_LIB_RT)
-
-
-# We need extra libraries on Windows
-if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-  target_link_libraries(benchmark PRIVATE shlwapi)
-endif()
-
-# We need extra libraries on Solaris
-if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
-  target_link_libraries(benchmark PRIVATE kstat)
-endif()
-
-# Benchmark main library
-add_library(benchmark_main "benchmark_main.cc")
-add_library(benchmark::benchmark_main ALIAS benchmark_main)
-set_target_properties(benchmark_main PROPERTIES
-  OUTPUT_NAME "benchmark_main"
-  VERSION ${GENERIC_LIB_VERSION}
-  SOVERSION ${GENERIC_LIB_SOVERSION}
-)
-target_link_libraries(benchmark_main PUBLIC benchmark::benchmark)
-
-
-set(generated_dir "${PROJECT_BINARY_DIR}")
-
-set(version_config "${generated_dir}/${PROJECT_NAME}ConfigVersion.cmake")
-set(project_config "${generated_dir}/${PROJECT_NAME}Config.cmake")
-set(pkg_config "${generated_dir}/${PROJECT_NAME}.pc")
-set(targets_to_export benchmark benchmark_main)
-set(targets_export_name "${PROJECT_NAME}Targets")
-
-set(namespace "${PROJECT_NAME}::")
-
-include(CMakePackageConfigHelpers)
-
-configure_package_config_file (
-  ${PROJECT_SOURCE_DIR}/cmake/Config.cmake.in
-  ${project_config}
-  INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
-  NO_SET_AND_CHECK_MACRO
-  NO_CHECK_REQUIRED_COMPONENTS_MACRO
-)
-write_basic_package_version_file(
-  "${version_config}" VERSION ${GENERIC_LIB_VERSION} COMPATIBILITY SameMajorVersion
-)
-
-configure_file("${PROJECT_SOURCE_DIR}/cmake/benchmark.pc.in" "${pkg_config}" @ONLY)
-
-export (
-  TARGETS ${targets_to_export}
-  NAMESPACE "${namespace}"
-  FILE ${generated_dir}/${targets_export_name}.cmake
-)
-
-if (BENCHMARK_ENABLE_INSTALL)
-  # Install target (will install the library to specified CMAKE_INSTALL_PREFIX variable)
-  install(
-    TARGETS ${targets_to_export}
-    EXPORT ${targets_export_name}
-    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-    INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
-
-  install(
-    DIRECTORY "${PROJECT_SOURCE_DIR}/include/benchmark"
-    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-    FILES_MATCHING PATTERN "*.*h")
-
-  install(
-      FILES "${project_config}" "${version_config}"
-      DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
-
-  install(
-      FILES "${pkg_config}"
-      DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
-
-  install(
-      EXPORT "${targets_export_name}"
-      NAMESPACE "${namespace}"
-      DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
-endif()
-
-if (BENCHMARK_ENABLE_DOXYGEN)
-  find_package(Doxygen REQUIRED)
-  set(DOXYGEN_QUIET YES)
-  set(DOXYGEN_RECURSIVE YES)
-  set(DOXYGEN_GENERATE_HTML YES)
-  set(DOXYGEN_GENERATE_MAN NO)
-  set(DOXYGEN_MARKDOWN_SUPPORT YES)
-  set(DOXYGEN_BUILTIN_STL_SUPPORT YES)
-  set(DOXYGEN_EXTRACT_PACKAGE YES)
-  set(DOXYGEN_EXTRACT_STATIC YES)
-  set(DOXYGEN_SHOW_INCLUDE_FILES YES)
-  set(DOXYGEN_BINARY_TOC YES)
-  set(DOXYGEN_TOC_EXPAND YES)
-  set(DOXYGEN_USE_MDFILE_AS_MAINPAGE "index.md")
-  doxygen_add_docs(benchmark_doxygen
-    docs
-    include
-    src
-    ALL
-    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-    COMMENT "Building documentation with Doxygen.")
-  if (BENCHMARK_ENABLE_INSTALL AND BENCHMARK_INSTALL_DOCS)
-    install(
-      DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/html/"
-      DESTINATION ${CMAKE_INSTALL_DOCDIR})
-  endif()
-else()
-  if (BENCHMARK_ENABLE_INSTALL AND BENCHMARK_INSTALL_DOCS)
-    install(
-      DIRECTORY "${PROJECT_SOURCE_DIR}/docs/"
-      DESTINATION ${CMAKE_INSTALL_DOCDIR})
-  endif()
-endif()
diff --git a/3rdparty/benchmark/src/arraysize.h b/3rdparty/benchmark/src/arraysize.h
deleted file mode 100644
index 51a50f2d..00000000
--- a/3rdparty/benchmark/src/arraysize.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef BENCHMARK_ARRAYSIZE_H_
-#define BENCHMARK_ARRAYSIZE_H_
-
-#include "internal_macros.h"
-
-namespace benchmark {
-namespace internal {
-// The arraysize(arr) macro returns the # of elements in an array arr.
-// The expression is a compile-time constant, and therefore can be
-// used in defining new arrays, for example.  If you use arraysize on
-// a pointer by mistake, you will get a compile-time error.
-//
-
-// This template function declaration is used in defining arraysize.
-// Note that the function doesn't need an implementation, as we only
-// use its type.
-template <typename T, size_t N>
-char (&ArraySizeHelper(T (&array)[N]))[N];
-
-// That gcc wants both of these prototypes seems mysterious. VC, for
-// its part, can't decide which to use (another mystery). Matching of
-// template overloads: the final frontier.
-#ifndef COMPILER_MSVC
-template <typename T, size_t N>
-char (&ArraySizeHelper(const T (&array)[N]))[N];
-#endif
-
-#define arraysize(array) (sizeof(::benchmark::internal::ArraySizeHelper(array)))
-
-}  // end namespace internal
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_ARRAYSIZE_H_
diff --git a/3rdparty/benchmark/src/benchmark.cc b/3rdparty/benchmark/src/benchmark.cc
deleted file mode 100644
index cedeee31..00000000
--- a/3rdparty/benchmark/src/benchmark.cc
+++ /dev/null
@@ -1,626 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-
-#include "benchmark_api_internal.h"
-#include "benchmark_runner.h"
-#include "internal_macros.h"
-
-#ifndef BENCHMARK_OS_WINDOWS
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <unistd.h>
-#endif
-
-#include <algorithm>
-#include <atomic>
-#include <condition_variable>
-#include <cstdio>
-#include <cstdlib>
-#include <fstream>
-#include <iostream>
-#include <limits>
-#include <map>
-#include <memory>
-#include <random>
-#include <string>
-#include <thread>
-#include <utility>
-
-#include "check.h"
-#include "colorprint.h"
-#include "commandlineflags.h"
-#include "complexity.h"
-#include "counter.h"
-#include "internal_macros.h"
-#include "log.h"
-#include "mutex.h"
-#include "perf_counters.h"
-#include "re.h"
-#include "statistics.h"
-#include "string_util.h"
-#include "thread_manager.h"
-#include "thread_timer.h"
-
-namespace benchmark {
-// Print a list of benchmarks. This option overrides all other options.
-BM_DEFINE_bool(benchmark_list_tests, false);
-
-// A regular expression that specifies the set of benchmarks to execute.  If
-// this flag is empty, or if this flag is the string \"all\", all benchmarks
-// linked into the binary are run.
-BM_DEFINE_string(benchmark_filter, "");
-
-// Minimum number of seconds we should run benchmark before results are
-// considered significant.  For cpu-time based tests, this is the lower bound
-// on the total cpu time used by all threads that make up the test.  For
-// real-time based tests, this is the lower bound on the elapsed time of the
-// benchmark execution, regardless of number of threads.
-BM_DEFINE_double(benchmark_min_time, 0.5);
-
-// The number of runs of each benchmark. If greater than 1, the mean and
-// standard deviation of the runs will be reported.
-BM_DEFINE_int32(benchmark_repetitions, 1);
-
-// If set, enable random interleaving of repetitions of all benchmarks.
-// See http://github.com/google/benchmark/issues/1051 for details.
-BM_DEFINE_bool(benchmark_enable_random_interleaving, false);
-
-// Report the result of each benchmark repetitions. When 'true' is specified
-// only the mean, standard deviation, and other statistics are reported for
-// repeated benchmarks. Affects all reporters.
-BM_DEFINE_bool(benchmark_report_aggregates_only, false);
-
-// Display the result of each benchmark repetitions. When 'true' is specified
-// only the mean, standard deviation, and other statistics are displayed for
-// repeated benchmarks. Unlike benchmark_report_aggregates_only, only affects
-// the display reporter, but  *NOT* file reporter, which will still contain
-// all the output.
-BM_DEFINE_bool(benchmark_display_aggregates_only, false);
-
-// The format to use for console output.
-// Valid values are 'console', 'json', or 'csv'.
-BM_DEFINE_string(benchmark_format, "console");
-
-// The format to use for file output.
-// Valid values are 'console', 'json', or 'csv'.
-BM_DEFINE_string(benchmark_out_format, "json");
-
-// The file to write additional output to.
-BM_DEFINE_string(benchmark_out, "");
-
-// Whether to use colors in the output.  Valid values:
-// 'true'/'yes'/1, 'false'/'no'/0, and 'auto'. 'auto' means to use colors if
-// the output is being sent to a terminal and the TERM environment variable is
-// set to a terminal type that supports colors.
-BM_DEFINE_string(benchmark_color, "auto");
-
-// Whether to use tabular format when printing user counters to the console.
-// Valid values: 'true'/'yes'/1, 'false'/'no'/0.  Defaults to false.
-BM_DEFINE_bool(benchmark_counters_tabular, false);
-
-// List of additional perf counters to collect, in libpfm format. For more
-// information about libpfm: https://man7.org/linux/man-pages/man3/libpfm.3.html
-BM_DEFINE_string(benchmark_perf_counters, "");
-
-// Extra context to include in the output formatted as comma-separated key-value
-// pairs. Kept internal as it's only used for parsing from env/command line.
-BM_DEFINE_kvpairs(benchmark_context, {});
-
-// The level of verbose logging to output
-BM_DEFINE_int32(v, 0);
-
-namespace internal {
-
-std::map<std::string, std::string>* global_context = nullptr;
-
-// FIXME: wouldn't LTO mess this up?
-void UseCharPointer(char const volatile*) {}
-
-}  // namespace internal
-
-State::State(IterationCount max_iters, const std::vector<int64_t>& ranges,
-             int thread_i, int n_threads, internal::ThreadTimer* timer,
-             internal::ThreadManager* manager,
-             internal::PerfCountersMeasurement* perf_counters_measurement)
-    : total_iterations_(0),
-      batch_leftover_(0),
-      max_iterations(max_iters),
-      started_(false),
-      finished_(false),
-      error_occurred_(false),
-      range_(ranges),
-      complexity_n_(0),
-      thread_index_(thread_i),
-      threads_(n_threads),
-      timer_(timer),
-      manager_(manager),
-      perf_counters_measurement_(perf_counters_measurement) {
-  BM_CHECK(max_iterations != 0) << "At least one iteration must be run";
-  BM_CHECK_LT(thread_index_, threads_)
-      << "thread_index must be less than threads";
-
-  // Note: The use of offsetof below is technically undefined until C++17
-  // because State is not a standard layout type. However, all compilers
-  // currently provide well-defined behavior as an extension (which is
-  // demonstrated since constexpr evaluation must diagnose all undefined
-  // behavior). However, GCC and Clang also warn about this use of offsetof,
-  // which must be suppressed.
-#if defined(__INTEL_COMPILER)
-#pragma warning push
-#pragma warning(disable : 1875)
-#elif defined(__GNUC__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Winvalid-offsetof"
-#endif
-  // Offset tests to ensure commonly accessed data is on the first cache line.
-  const int cache_line_size = 64;
-  static_assert(offsetof(State, error_occurred_) <=
-                    (cache_line_size - sizeof(error_occurred_)),
-                "");
-#if defined(__INTEL_COMPILER)
-#pragma warning pop
-#elif defined(__GNUC__)
-#pragma GCC diagnostic pop
-#endif
-}
-
-void State::PauseTiming() {
-  // Add in time accumulated so far
-  BM_CHECK(started_ && !finished_ && !error_occurred_);
-  timer_->StopTimer();
-  if (perf_counters_measurement_) {
-    auto measurements = perf_counters_measurement_->StopAndGetMeasurements();
-    for (const auto& name_and_measurement : measurements) {
-      auto name = name_and_measurement.first;
-      auto measurement = name_and_measurement.second;
-      BM_CHECK_EQ(counters[name], 0.0);
-      counters[name] = Counter(measurement, Counter::kAvgIterations);
-    }
-  }
-}
-
-void State::ResumeTiming() {
-  BM_CHECK(started_ && !finished_ && !error_occurred_);
-  timer_->StartTimer();
-  if (perf_counters_measurement_) {
-    perf_counters_measurement_->Start();
-  }
-}
-
-void State::SkipWithError(const char* msg) {
-  BM_CHECK(msg);
-  error_occurred_ = true;
-  {
-    MutexLock l(manager_->GetBenchmarkMutex());
-    if (manager_->results.has_error_ == false) {
-      manager_->results.error_message_ = msg;
-      manager_->results.has_error_ = true;
-    }
-  }
-  total_iterations_ = 0;
-  if (timer_->running()) timer_->StopTimer();
-}
-
-void State::SetIterationTime(double seconds) {
-  timer_->SetIterationTime(seconds);
-}
-
-void State::SetLabel(const char* label) {
-  MutexLock l(manager_->GetBenchmarkMutex());
-  manager_->results.report_label_ = label;
-}
-
-void State::StartKeepRunning() {
-  BM_CHECK(!started_ && !finished_);
-  started_ = true;
-  total_iterations_ = error_occurred_ ? 0 : max_iterations;
-  manager_->StartStopBarrier();
-  if (!error_occurred_) ResumeTiming();
-}
-
-void State::FinishKeepRunning() {
-  BM_CHECK(started_ && (!finished_ || error_occurred_));
-  if (!error_occurred_) {
-    PauseTiming();
-  }
-  // Total iterations has now wrapped around past 0. Fix this.
-  total_iterations_ = 0;
-  finished_ = true;
-  manager_->StartStopBarrier();
-}
-
-namespace internal {
-namespace {
-
-// Flushes streams after invoking reporter methods that write to them. This
-// ensures users get timely updates even when streams are not line-buffered.
-void FlushStreams(BenchmarkReporter* reporter) {
-  if (!reporter) return;
-  std::flush(reporter->GetOutputStream());
-  std::flush(reporter->GetErrorStream());
-}
-
-// Reports in both display and file reporters.
-void Report(BenchmarkReporter* display_reporter,
-            BenchmarkReporter* file_reporter, const RunResults& run_results) {
-  auto report_one = [](BenchmarkReporter* reporter, bool aggregates_only,
-                       const RunResults& results) {
-    assert(reporter);
-    // If there are no aggregates, do output non-aggregates.
-    aggregates_only &= !results.aggregates_only.empty();
-    if (!aggregates_only) reporter->ReportRuns(results.non_aggregates);
-    if (!results.aggregates_only.empty())
-      reporter->ReportRuns(results.aggregates_only);
-  };
-
-  report_one(display_reporter, run_results.display_report_aggregates_only,
-             run_results);
-  if (file_reporter)
-    report_one(file_reporter, run_results.file_report_aggregates_only,
-               run_results);
-
-  FlushStreams(display_reporter);
-  FlushStreams(file_reporter);
-}
-
-void RunBenchmarks(const std::vector<BenchmarkInstance>& benchmarks,
-                   BenchmarkReporter* display_reporter,
-                   BenchmarkReporter* file_reporter) {
-  // Note the file_reporter can be null.
-  BM_CHECK(display_reporter != nullptr);
-
-  // Determine the width of the name field using a minimum width of 10.
-  bool might_have_aggregates = FLAGS_benchmark_repetitions > 1;
-  size_t name_field_width = 10;
-  size_t stat_field_width = 0;
-  for (const BenchmarkInstance& benchmark : benchmarks) {
-    name_field_width =
-        std::max<size_t>(name_field_width, benchmark.name().str().size());
-    might_have_aggregates |= benchmark.repetitions() > 1;
-
-    for (const auto& Stat : benchmark.statistics())
-      stat_field_width = std::max<size_t>(stat_field_width, Stat.name_.size());
-  }
-  if (might_have_aggregates) name_field_width += 1 + stat_field_width;
-
-  // Print header here
-  BenchmarkReporter::Context context;
-  context.name_field_width = name_field_width;
-
-  // Keep track of running times of all instances of each benchmark family.
-  std::map<int /*family_index*/, BenchmarkReporter::PerFamilyRunReports>
-      per_family_reports;
-
-  if (display_reporter->ReportContext(context) &&
-      (!file_reporter || file_reporter->ReportContext(context))) {
-    FlushStreams(display_reporter);
-    FlushStreams(file_reporter);
-
-    size_t num_repetitions_total = 0;
-
-    std::vector<internal::BenchmarkRunner> runners;
-    runners.reserve(benchmarks.size());
-    for (const BenchmarkInstance& benchmark : benchmarks) {
-      BenchmarkReporter::PerFamilyRunReports* reports_for_family = nullptr;
-      if (benchmark.complexity() != oNone)
-        reports_for_family = &per_family_reports[benchmark.family_index()];
-
-      runners.emplace_back(benchmark, reports_for_family);
-      int num_repeats_of_this_instance = runners.back().GetNumRepeats();
-      num_repetitions_total += num_repeats_of_this_instance;
-      if (reports_for_family)
-        reports_for_family->num_runs_total += num_repeats_of_this_instance;
-    }
-    assert(runners.size() == benchmarks.size() && "Unexpected runner count.");
-
-    std::vector<size_t> repetition_indices;
-    repetition_indices.reserve(num_repetitions_total);
-    for (size_t runner_index = 0, num_runners = runners.size();
-         runner_index != num_runners; ++runner_index) {
-      const internal::BenchmarkRunner& runner = runners[runner_index];
-      std::fill_n(std::back_inserter(repetition_indices),
-                  runner.GetNumRepeats(), runner_index);
-    }
-    assert(repetition_indices.size() == num_repetitions_total &&
-           "Unexpected number of repetition indexes.");
-
-    if (FLAGS_benchmark_enable_random_interleaving) {
-      std::random_device rd;
-      std::mt19937 g(rd());
-      std::shuffle(repetition_indices.begin(), repetition_indices.end(), g);
-    }
-
-    for (size_t repetition_index : repetition_indices) {
-      internal::BenchmarkRunner& runner = runners[repetition_index];
-      runner.DoOneRepetition();
-      if (runner.HasRepeatsRemaining()) continue;
-      // FIXME: report each repetition separately, not all of them in bulk.
-
-      RunResults run_results = runner.GetResults();
-
-      // Maybe calculate complexity report
-      if (const auto* reports_for_family = runner.GetReportsForFamily()) {
-        if (reports_for_family->num_runs_done ==
-            reports_for_family->num_runs_total) {
-          auto additional_run_stats = ComputeBigO(reports_for_family->Runs);
-          run_results.aggregates_only.insert(run_results.aggregates_only.end(),
-                                             additional_run_stats.begin(),
-                                             additional_run_stats.end());
-          per_family_reports.erase(
-              static_cast<int>(reports_for_family->Runs.front().family_index));
-        }
-      }
-
-      Report(display_reporter, file_reporter, run_results);
-    }
-  }
-  display_reporter->Finalize();
-  if (file_reporter) file_reporter->Finalize();
-  FlushStreams(display_reporter);
-  FlushStreams(file_reporter);
-}
-
-// Disable deprecated warnings temporarily because we need to reference
-// CSVReporter but don't want to trigger -Werror=-Wdeprecated-declarations
-BENCHMARK_DISABLE_DEPRECATED_WARNING
-
-std::unique_ptr<BenchmarkReporter> CreateReporter(
-    std::string const& name, ConsoleReporter::OutputOptions output_opts) {
-  typedef std::unique_ptr<BenchmarkReporter> PtrType;
-  if (name == "console") {
-    return PtrType(new ConsoleReporter(output_opts));
-  } else if (name == "json") {
-    return PtrType(new JSONReporter);
-  } else if (name == "csv") {
-    return PtrType(new CSVReporter);
-  } else {
-    std::cerr << "Unexpected format: '" << name << "'\n";
-    std::exit(1);
-  }
-}
-
-BENCHMARK_RESTORE_DEPRECATED_WARNING
-
-}  // end namespace
-
-bool IsZero(double n) {
-  return std::abs(n) < std::numeric_limits<double>::epsilon();
-}
-
-ConsoleReporter::OutputOptions GetOutputOptions(bool force_no_color) {
-  int output_opts = ConsoleReporter::OO_Defaults;
-  auto is_benchmark_color = [force_no_color]() -> bool {
-    if (force_no_color) {
-      return false;
-    }
-    if (FLAGS_benchmark_color == "auto") {
-      return IsColorTerminal();
-    }
-    return IsTruthyFlagValue(FLAGS_benchmark_color);
-  };
-  if (is_benchmark_color()) {
-    output_opts |= ConsoleReporter::OO_Color;
-  } else {
-    output_opts &= ~ConsoleReporter::OO_Color;
-  }
-  if (FLAGS_benchmark_counters_tabular) {
-    output_opts |= ConsoleReporter::OO_Tabular;
-  } else {
-    output_opts &= ~ConsoleReporter::OO_Tabular;
-  }
-  return static_cast<ConsoleReporter::OutputOptions>(output_opts);
-}
-
-}  // end namespace internal
-
-size_t RunSpecifiedBenchmarks() {
-  return RunSpecifiedBenchmarks(nullptr, nullptr, FLAGS_benchmark_filter);
-}
-
-size_t RunSpecifiedBenchmarks(std::string spec) {
-  return RunSpecifiedBenchmarks(nullptr, nullptr, std::move(spec));
-}
-
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter) {
-  return RunSpecifiedBenchmarks(display_reporter, nullptr,
-                                FLAGS_benchmark_filter);
-}
-
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
-                              std::string spec) {
-  return RunSpecifiedBenchmarks(display_reporter, nullptr, std::move(spec));
-}
-
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
-                              BenchmarkReporter* file_reporter) {
-  return RunSpecifiedBenchmarks(display_reporter, file_reporter,
-                                FLAGS_benchmark_filter);
-}
-
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
-                              BenchmarkReporter* file_reporter,
-                              std::string spec) {
-  if (spec.empty() || spec == "all")
-    spec = ".";  // Regexp that matches all benchmarks
-
-  // Setup the reporters
-  std::ofstream output_file;
-  std::unique_ptr<BenchmarkReporter> default_display_reporter;
-  std::unique_ptr<BenchmarkReporter> default_file_reporter;
-  if (!display_reporter) {
-    default_display_reporter = internal::CreateReporter(
-        FLAGS_benchmark_format, internal::GetOutputOptions());
-    display_reporter = default_display_reporter.get();
-  }
-  auto& Out = display_reporter->GetOutputStream();
-  auto& Err = display_reporter->GetErrorStream();
-
-  std::string const& fname = FLAGS_benchmark_out;
-  if (fname.empty() && file_reporter) {
-    Err << "A custom file reporter was provided but "
-           "--benchmark_out=<file> was not specified."
-        << std::endl;
-    std::exit(1);
-  }
-  if (!fname.empty()) {
-    output_file.open(fname);
-    if (!output_file.is_open()) {
-      Err << "invalid file name: '" << fname << "'" << std::endl;
-      std::exit(1);
-    }
-    if (!file_reporter) {
-      default_file_reporter = internal::CreateReporter(
-          FLAGS_benchmark_out_format, ConsoleReporter::OO_None);
-      file_reporter = default_file_reporter.get();
-    }
-    file_reporter->SetOutputStream(&output_file);
-    file_reporter->SetErrorStream(&output_file);
-  }
-
-  std::vector<internal::BenchmarkInstance> benchmarks;
-  if (!FindBenchmarksInternal(spec, &benchmarks, &Err)) return 0;
-
-  if (benchmarks.empty()) {
-    Err << "Failed to match any benchmarks against regex: " << spec << "\n";
-    return 0;
-  }
-
-  if (FLAGS_benchmark_list_tests) {
-    for (auto const& benchmark : benchmarks)
-      Out << benchmark.name().str() << "\n";
-  } else {
-    internal::RunBenchmarks(benchmarks, display_reporter, file_reporter);
-  }
-
-  return benchmarks.size();
-}
-
-std::string GetBenchmarkFilter() { return FLAGS_benchmark_filter; }
-
-void RegisterMemoryManager(MemoryManager* manager) {
-  internal::memory_manager = manager;
-}
-
-void AddCustomContext(const std::string& key, const std::string& value) {
-  if (internal::global_context == nullptr) {
-    internal::global_context = new std::map<std::string, std::string>();
-  }
-  if (!internal::global_context->emplace(key, value).second) {
-    std::cerr << "Failed to add custom context \"" << key << "\" as it already "
-              << "exists with value \"" << value << "\"\n";
-  }
-}
-
-namespace internal {
-
-void PrintUsageAndExit() {
-  fprintf(stdout,
-          "benchmark"
-          " [--benchmark_list_tests={true|false}]\n"
-          "          [--benchmark_filter=<regex>]\n"
-          "          [--benchmark_min_time=<min_time>]\n"
-          "          [--benchmark_repetitions=<num_repetitions>]\n"
-          "          [--benchmark_enable_random_interleaving={true|false}]\n"
-          "          [--benchmark_report_aggregates_only={true|false}]\n"
-          "          [--benchmark_display_aggregates_only={true|false}]\n"
-          "          [--benchmark_format=<console|json|csv>]\n"
-          "          [--benchmark_out=<filename>]\n"
-          "          [--benchmark_out_format=<json|console|csv>]\n"
-          "          [--benchmark_color={auto|true|false}]\n"
-          "          [--benchmark_counters_tabular={true|false}]\n"
-          "          [--benchmark_perf_counters=<counter>,...]\n"
-          "          [--benchmark_context=<key>=<value>,...]\n"
-          "          [--v=<verbosity>]\n");
-  exit(0);
-}
-
-void ParseCommandLineFlags(int* argc, char** argv) {
-  using namespace benchmark;
-  BenchmarkReporter::Context::executable_name =
-      (argc && *argc > 0) ? argv[0] : "unknown";
-  for (int i = 1; argc && i < *argc; ++i) {
-    if (ParseBoolFlag(argv[i], "benchmark_list_tests",
-                      &FLAGS_benchmark_list_tests) ||
-        ParseStringFlag(argv[i], "benchmark_filter", &FLAGS_benchmark_filter) ||
-        ParseDoubleFlag(argv[i], "benchmark_min_time",
-                        &FLAGS_benchmark_min_time) ||
-        ParseInt32Flag(argv[i], "benchmark_repetitions",
-                       &FLAGS_benchmark_repetitions) ||
-        ParseBoolFlag(argv[i], "benchmark_enable_random_interleaving",
-                      &FLAGS_benchmark_enable_random_interleaving) ||
-        ParseBoolFlag(argv[i], "benchmark_report_aggregates_only",
-                      &FLAGS_benchmark_report_aggregates_only) ||
-        ParseBoolFlag(argv[i], "benchmark_display_aggregates_only",
-                      &FLAGS_benchmark_display_aggregates_only) ||
-        ParseStringFlag(argv[i], "benchmark_format", &FLAGS_benchmark_format) ||
-        ParseStringFlag(argv[i], "benchmark_out", &FLAGS_benchmark_out) ||
-        ParseStringFlag(argv[i], "benchmark_out_format",
-                        &FLAGS_benchmark_out_format) ||
-        ParseStringFlag(argv[i], "benchmark_color", &FLAGS_benchmark_color) ||
-        ParseBoolFlag(argv[i], "benchmark_counters_tabular",
-                      &FLAGS_benchmark_counters_tabular) ||
-        ParseStringFlag(argv[i], "benchmark_perf_counters",
-                        &FLAGS_benchmark_perf_counters) ||
-        ParseKeyValueFlag(argv[i], "benchmark_context",
-                          &FLAGS_benchmark_context) ||
-        ParseInt32Flag(argv[i], "v", &FLAGS_v)) {
-      for (int j = i; j != *argc - 1; ++j) argv[j] = argv[j + 1];
-
-      --(*argc);
-      --i;
-    } else if (IsFlag(argv[i], "help")) {
-      PrintUsageAndExit();
-    }
-  }
-  for (auto const* flag :
-       {&FLAGS_benchmark_format, &FLAGS_benchmark_out_format}) {
-    if (*flag != "console" && *flag != "json" && *flag != "csv") {
-      PrintUsageAndExit();
-    }
-  }
-  if (FLAGS_benchmark_color.empty()) {
-    PrintUsageAndExit();
-  }
-  for (const auto& kv : FLAGS_benchmark_context) {
-    AddCustomContext(kv.first, kv.second);
-  }
-}
-
-int InitializeStreams() {
-  static std::ios_base::Init init;
-  return 0;
-}
-
-}  // end namespace internal
-
-void Initialize(int* argc, char** argv) {
-  internal::ParseCommandLineFlags(argc, argv);
-  internal::LogLevel() = FLAGS_v;
-}
-
-void Shutdown() { delete internal::global_context; }
-
-bool ReportUnrecognizedArguments(int argc, char** argv) {
-  for (int i = 1; i < argc; ++i) {
-    fprintf(stderr, "%s: error: unrecognized command-line flag: %s\n", argv[0],
-            argv[i]);
-  }
-  return argc > 1;
-}
-
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/benchmark_api_internal.cc b/3rdparty/benchmark/src/benchmark_api_internal.cc
deleted file mode 100644
index 4de36e3c..00000000
--- a/3rdparty/benchmark/src/benchmark_api_internal.cc
+++ /dev/null
@@ -1,112 +0,0 @@
-#include "benchmark_api_internal.h"
-
-#include <cinttypes>
-
-#include "string_util.h"
-
-namespace benchmark {
-namespace internal {
-
-BenchmarkInstance::BenchmarkInstance(Benchmark* benchmark, int family_idx,
-                                     int per_family_instance_idx,
-                                     const std::vector<int64_t>& args,
-                                     int thread_count)
-    : benchmark_(*benchmark),
-      family_index_(family_idx),
-      per_family_instance_index_(per_family_instance_idx),
-      aggregation_report_mode_(benchmark_.aggregation_report_mode_),
-      args_(args),
-      time_unit_(benchmark_.time_unit_),
-      measure_process_cpu_time_(benchmark_.measure_process_cpu_time_),
-      use_real_time_(benchmark_.use_real_time_),
-      use_manual_time_(benchmark_.use_manual_time_),
-      complexity_(benchmark_.complexity_),
-      complexity_lambda_(benchmark_.complexity_lambda_),
-      statistics_(benchmark_.statistics_),
-      repetitions_(benchmark_.repetitions_),
-      min_time_(benchmark_.min_time_),
-      iterations_(benchmark_.iterations_),
-      threads_(thread_count) {
-  name_.function_name = benchmark_.name_;
-
-  size_t arg_i = 0;
-  for (const auto& arg : args) {
-    if (!name_.args.empty()) {
-      name_.args += '/';
-    }
-
-    if (arg_i < benchmark->arg_names_.size()) {
-      const auto& arg_name = benchmark_.arg_names_[arg_i];
-      if (!arg_name.empty()) {
-        name_.args += StrFormat("%s:", arg_name.c_str());
-      }
-    }
-
-    name_.args += StrFormat("%" PRId64, arg);
-    ++arg_i;
-  }
-
-  if (!IsZero(benchmark->min_time_)) {
-    name_.min_time = StrFormat("min_time:%0.3f", benchmark_.min_time_);
-  }
-
-  if (benchmark_.iterations_ != 0) {
-    name_.iterations = StrFormat(
-        "iterations:%lu", static_cast<unsigned long>(benchmark_.iterations_));
-  }
-
-  if (benchmark_.repetitions_ != 0) {
-    name_.repetitions = StrFormat("repeats:%d", benchmark_.repetitions_);
-  }
-
-  if (benchmark_.measure_process_cpu_time_) {
-    name_.time_type = "process_time";
-  }
-
-  if (benchmark_.use_manual_time_) {
-    if (!name_.time_type.empty()) {
-      name_.time_type += '/';
-    }
-    name_.time_type += "manual_time";
-  } else if (benchmark_.use_real_time_) {
-    if (!name_.time_type.empty()) {
-      name_.time_type += '/';
-    }
-    name_.time_type += "real_time";
-  }
-
-  if (!benchmark_.thread_counts_.empty()) {
-    name_.threads = StrFormat("threads:%d", threads_);
-  }
-
-  setup_ = benchmark_.setup_;
-  teardown_ = benchmark_.teardown_;
-}
-
-State BenchmarkInstance::Run(
-    IterationCount iters, int thread_id, internal::ThreadTimer* timer,
-    internal::ThreadManager* manager,
-    internal::PerfCountersMeasurement* perf_counters_measurement) const {
-  State st(iters, args_, thread_id, threads_, timer, manager,
-           perf_counters_measurement);
-  benchmark_.Run(st);
-  return st;
-}
-
-void BenchmarkInstance::Setup() const {
-  if (setup_) {
-    State st(/*iters*/ 1, args_, /*thread_id*/ 0, threads_, nullptr, nullptr,
-             nullptr);
-    setup_(st);
-  }
-}
-
-void BenchmarkInstance::Teardown() const {
-  if (teardown_) {
-    State st(/*iters*/ 1, args_, /*thread_id*/ 0, threads_, nullptr, nullptr,
-             nullptr);
-    teardown_(st);
-  }
-}
-}  // namespace internal
-}  // namespace benchmark
diff --git a/3rdparty/benchmark/src/benchmark_api_internal.h b/3rdparty/benchmark/src/benchmark_api_internal.h
deleted file mode 100644
index 94c2b297..00000000
--- a/3rdparty/benchmark/src/benchmark_api_internal.h
+++ /dev/null
@@ -1,84 +0,0 @@
-#ifndef BENCHMARK_API_INTERNAL_H
-#define BENCHMARK_API_INTERNAL_H
-
-#include <cmath>
-#include <iosfwd>
-#include <limits>
-#include <memory>
-#include <string>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "commandlineflags.h"
-
-namespace benchmark {
-namespace internal {
-
-// Information kept per benchmark we may want to run
-class BenchmarkInstance {
- public:
-  BenchmarkInstance(Benchmark* benchmark, int family_index,
-                    int per_family_instance_index,
-                    const std::vector<int64_t>& args, int threads);
-
-  const BenchmarkName& name() const { return name_; }
-  int family_index() const { return family_index_; }
-  int per_family_instance_index() const { return per_family_instance_index_; }
-  AggregationReportMode aggregation_report_mode() const {
-    return aggregation_report_mode_;
-  }
-  TimeUnit time_unit() const { return time_unit_; }
-  bool measure_process_cpu_time() const { return measure_process_cpu_time_; }
-  bool use_real_time() const { return use_real_time_; }
-  bool use_manual_time() const { return use_manual_time_; }
-  BigO complexity() const { return complexity_; }
-  BigOFunc* complexity_lambda() const { return complexity_lambda_; }
-  const std::vector<Statistics>& statistics() const { return statistics_; }
-  int repetitions() const { return repetitions_; }
-  double min_time() const { return min_time_; }
-  IterationCount iterations() const { return iterations_; }
-  int threads() const { return threads_; }
-  void Setup() const;
-  void Teardown() const;
-
-  State Run(IterationCount iters, int thread_id, internal::ThreadTimer* timer,
-            internal::ThreadManager* manager,
-            internal::PerfCountersMeasurement* perf_counters_measurement) const;
-
- private:
-  BenchmarkName name_;
-  Benchmark& benchmark_;
-  const int family_index_;
-  const int per_family_instance_index_;
-  AggregationReportMode aggregation_report_mode_;
-  const std::vector<int64_t>& args_;
-  TimeUnit time_unit_;
-  bool measure_process_cpu_time_;
-  bool use_real_time_;
-  bool use_manual_time_;
-  BigO complexity_;
-  BigOFunc* complexity_lambda_;
-  UserCounters counters_;
-  const std::vector<Statistics>& statistics_;
-  int repetitions_;
-  double min_time_;
-  IterationCount iterations_;
-  int threads_;  // Number of concurrent threads to us
-
-  typedef void (*callback_function)(const benchmark::State&);
-  callback_function setup_ = nullptr;
-  callback_function teardown_ = nullptr;
-};
-
-bool FindBenchmarksInternal(const std::string& re,
-                            std::vector<BenchmarkInstance>* benchmarks,
-                            std::ostream* Err);
-
-bool IsZero(double n);
-
-ConsoleReporter::OutputOptions GetOutputOptions(bool force_no_color = false);
-
-}  // end namespace internal
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_API_INTERNAL_H
diff --git a/3rdparty/benchmark/src/benchmark_main.cc b/3rdparty/benchmark/src/benchmark_main.cc
deleted file mode 100644
index b3b24783..00000000
--- a/3rdparty/benchmark/src/benchmark_main.cc
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2018 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-
-BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/src/benchmark_name.cc b/3rdparty/benchmark/src/benchmark_name.cc
deleted file mode 100644
index 2a17ebce..00000000
--- a/3rdparty/benchmark/src/benchmark_name.cc
+++ /dev/null
@@ -1,58 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <benchmark/benchmark.h>
-
-namespace benchmark {
-
-namespace {
-
-// Compute the total size of a pack of std::strings
-size_t size_impl() { return 0; }
-
-template <typename Head, typename... Tail>
-size_t size_impl(const Head& head, const Tail&... tail) {
-  return head.size() + size_impl(tail...);
-}
-
-// Join a pack of std::strings using a delimiter
-// TODO: use absl::StrJoin
-void join_impl(std::string&, char) {}
-
-template <typename Head, typename... Tail>
-void join_impl(std::string& s, const char delimiter, const Head& head,
-               const Tail&... tail) {
-  if (!s.empty() && !head.empty()) {
-    s += delimiter;
-  }
-
-  s += head;
-
-  join_impl(s, delimiter, tail...);
-}
-
-template <typename... Ts>
-std::string join(char delimiter, const Ts&... ts) {
-  std::string s;
-  s.reserve(sizeof...(Ts) + size_impl(ts...));
-  join_impl(s, delimiter, ts...);
-  return s;
-}
-}  // namespace
-
-std::string BenchmarkName::str() const {
-  return join('/', function_name, args, min_time, iterations, repetitions,
-              time_type, threads);
-}
-}  // namespace benchmark
diff --git a/3rdparty/benchmark/src/benchmark_register.cc b/3rdparty/benchmark/src/benchmark_register.cc
deleted file mode 100644
index 61a0c261..00000000
--- a/3rdparty/benchmark/src/benchmark_register.cc
+++ /dev/null
@@ -1,492 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark_register.h"
-
-#ifndef BENCHMARK_OS_WINDOWS
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <unistd.h>
-#endif
-
-#include <algorithm>
-#include <atomic>
-#include <cinttypes>
-#include <condition_variable>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <fstream>
-#include <iostream>
-#include <memory>
-#include <numeric>
-#include <sstream>
-#include <thread>
-
-#include "benchmark/benchmark.h"
-#include "benchmark_api_internal.h"
-#include "check.h"
-#include "commandlineflags.h"
-#include "complexity.h"
-#include "internal_macros.h"
-#include "log.h"
-#include "mutex.h"
-#include "re.h"
-#include "statistics.h"
-#include "string_util.h"
-#include "timers.h"
-
-namespace benchmark {
-
-namespace {
-// For non-dense Range, intermediate values are powers of kRangeMultiplier.
-static const int kRangeMultiplier = 8;
-// The size of a benchmark family determines is the number of inputs to repeat
-// the benchmark on. If this is "large" then warn the user during configuration.
-static const size_t kMaxFamilySize = 100;
-}  // end namespace
-
-namespace internal {
-
-//=============================================================================//
-//                         BenchmarkFamilies
-//=============================================================================//
-
-// Class for managing registered benchmarks.  Note that each registered
-// benchmark identifies a family of related benchmarks to run.
-class BenchmarkFamilies {
- public:
-  static BenchmarkFamilies* GetInstance();
-
-  // Registers a benchmark family and returns the index assigned to it.
-  size_t AddBenchmark(std::unique_ptr<Benchmark> family);
-
-  // Clear all registered benchmark families.
-  void ClearBenchmarks();
-
-  // Extract the list of benchmark instances that match the specified
-  // regular expression.
-  bool FindBenchmarks(std::string re,
-                      std::vector<BenchmarkInstance>* benchmarks,
-                      std::ostream* Err);
-
- private:
-  BenchmarkFamilies() {}
-
-  std::vector<std::unique_ptr<Benchmark>> families_;
-  Mutex mutex_;
-};
-
-BenchmarkFamilies* BenchmarkFamilies::GetInstance() {
-  static BenchmarkFamilies instance;
-  return &instance;
-}
-
-size_t BenchmarkFamilies::AddBenchmark(std::unique_ptr<Benchmark> family) {
-  MutexLock l(mutex_);
-  size_t index = families_.size();
-  families_.push_back(std::move(family));
-  return index;
-}
-
-void BenchmarkFamilies::ClearBenchmarks() {
-  MutexLock l(mutex_);
-  families_.clear();
-  families_.shrink_to_fit();
-}
-
-bool BenchmarkFamilies::FindBenchmarks(
-    std::string spec, std::vector<BenchmarkInstance>* benchmarks,
-    std::ostream* ErrStream) {
-  BM_CHECK(ErrStream);
-  auto& Err = *ErrStream;
-  // Make regular expression out of command-line flag
-  std::string error_msg;
-  Regex re;
-  bool isNegativeFilter = false;
-  if (spec[0] == '-') {
-    spec.replace(0, 1, "");
-    isNegativeFilter = true;
-  }
-  if (!re.Init(spec, &error_msg)) {
-    Err << "Could not compile benchmark re: " << error_msg << std::endl;
-    return false;
-  }
-
-  // Special list of thread counts to use when none are specified
-  const std::vector<int> one_thread = {1};
-
-  int next_family_index = 0;
-
-  MutexLock l(mutex_);
-  for (std::unique_ptr<Benchmark>& family : families_) {
-    int family_index = next_family_index;
-    int per_family_instance_index = 0;
-
-    // Family was deleted or benchmark doesn't match
-    if (!family) continue;
-
-    if (family->ArgsCnt() == -1) {
-      family->Args({});
-    }
-    const std::vector<int>* thread_counts =
-        (family->thread_counts_.empty()
-             ? &one_thread
-             : &static_cast<const std::vector<int>&>(family->thread_counts_));
-    const size_t family_size = family->args_.size() * thread_counts->size();
-    // The benchmark will be run at least 'family_size' different inputs.
-    // If 'family_size' is very large warn the user.
-    if (family_size > kMaxFamilySize) {
-      Err << "The number of inputs is very large. " << family->name_
-          << " will be repeated at least " << family_size << " times.\n";
-    }
-    // reserve in the special case the regex ".", since we know the final
-    // family size.
-    if (spec == ".") benchmarks->reserve(benchmarks->size() + family_size);
-
-    for (auto const& args : family->args_) {
-      for (int num_threads : *thread_counts) {
-        BenchmarkInstance instance(family.get(), family_index,
-                                   per_family_instance_index, args,
-                                   num_threads);
-
-        const auto full_name = instance.name().str();
-        if ((re.Match(full_name) && !isNegativeFilter) ||
-            (!re.Match(full_name) && isNegativeFilter)) {
-          benchmarks->push_back(std::move(instance));
-
-          ++per_family_instance_index;
-
-          // Only bump the next family index once we've estabilished that
-          // at least one instance of this family will be run.
-          if (next_family_index == family_index) ++next_family_index;
-        }
-      }
-    }
-  }
-  return true;
-}
-
-Benchmark* RegisterBenchmarkInternal(Benchmark* bench) {
-  std::unique_ptr<Benchmark> bench_ptr(bench);
-  BenchmarkFamilies* families = BenchmarkFamilies::GetInstance();
-  families->AddBenchmark(std::move(bench_ptr));
-  return bench;
-}
-
-// FIXME: This function is a hack so that benchmark.cc can access
-// `BenchmarkFamilies`
-bool FindBenchmarksInternal(const std::string& re,
-                            std::vector<BenchmarkInstance>* benchmarks,
-                            std::ostream* Err) {
-  return BenchmarkFamilies::GetInstance()->FindBenchmarks(re, benchmarks, Err);
-}
-
-//=============================================================================//
-//                               Benchmark
-//=============================================================================//
-
-Benchmark::Benchmark(const char* name)
-    : name_(name),
-      aggregation_report_mode_(ARM_Unspecified),
-      time_unit_(kNanosecond),
-      range_multiplier_(kRangeMultiplier),
-      min_time_(0),
-      iterations_(0),
-      repetitions_(0),
-      measure_process_cpu_time_(false),
-      use_real_time_(false),
-      use_manual_time_(false),
-      complexity_(oNone),
-      complexity_lambda_(nullptr),
-      setup_(nullptr),
-      teardown_(nullptr) {
-  ComputeStatistics("mean", StatisticsMean);
-  ComputeStatistics("median", StatisticsMedian);
-  ComputeStatistics("stddev", StatisticsStdDev);
-  ComputeStatistics("cv", StatisticsCV, kPercentage);
-}
-
-Benchmark::~Benchmark() {}
-
-Benchmark* Benchmark::Name(const std::string& name) {
-  SetName(name.c_str());
-  return this;
-}
-
-Benchmark* Benchmark::Arg(int64_t x) {
-  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
-  args_.push_back({x});
-  return this;
-}
-
-Benchmark* Benchmark::Unit(TimeUnit unit) {
-  time_unit_ = unit;
-  return this;
-}
-
-Benchmark* Benchmark::Range(int64_t start, int64_t limit) {
-  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
-  std::vector<int64_t> arglist;
-  AddRange(&arglist, start, limit, range_multiplier_);
-
-  for (int64_t i : arglist) {
-    args_.push_back({i});
-  }
-  return this;
-}
-
-Benchmark* Benchmark::Ranges(
-    const std::vector<std::pair<int64_t, int64_t>>& ranges) {
-  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(ranges.size()));
-  std::vector<std::vector<int64_t>> arglists(ranges.size());
-  for (std::size_t i = 0; i < ranges.size(); i++) {
-    AddRange(&arglists[i], ranges[i].first, ranges[i].second,
-             range_multiplier_);
-  }
-
-  ArgsProduct(arglists);
-
-  return this;
-}
-
-Benchmark* Benchmark::ArgsProduct(
-    const std::vector<std::vector<int64_t>>& arglists) {
-  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(arglists.size()));
-
-  std::vector<std::size_t> indices(arglists.size());
-  const std::size_t total = std::accumulate(
-      std::begin(arglists), std::end(arglists), std::size_t{1},
-      [](const std::size_t res, const std::vector<int64_t>& arglist) {
-        return res * arglist.size();
-      });
-  std::vector<int64_t> args;
-  args.reserve(arglists.size());
-  for (std::size_t i = 0; i < total; i++) {
-    for (std::size_t arg = 0; arg < arglists.size(); arg++) {
-      args.push_back(arglists[arg][indices[arg]]);
-    }
-    args_.push_back(args);
-    args.clear();
-
-    std::size_t arg = 0;
-    do {
-      indices[arg] = (indices[arg] + 1) % arglists[arg].size();
-    } while (indices[arg++] == 0 && arg < arglists.size());
-  }
-
-  return this;
-}
-
-Benchmark* Benchmark::ArgName(const std::string& name) {
-  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
-  arg_names_ = {name};
-  return this;
-}
-
-Benchmark* Benchmark::ArgNames(const std::vector<std::string>& names) {
-  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(names.size()));
-  arg_names_ = names;
-  return this;
-}
-
-Benchmark* Benchmark::DenseRange(int64_t start, int64_t limit, int step) {
-  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
-  BM_CHECK_LE(start, limit);
-  for (int64_t arg = start; arg <= limit; arg += step) {
-    args_.push_back({arg});
-  }
-  return this;
-}
-
-Benchmark* Benchmark::Args(const std::vector<int64_t>& args) {
-  BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(args.size()));
-  args_.push_back(args);
-  return this;
-}
-
-Benchmark* Benchmark::Apply(void (*custom_arguments)(Benchmark* benchmark)) {
-  custom_arguments(this);
-  return this;
-}
-
-Benchmark* Benchmark::Setup(void (*setup)(const benchmark::State&)) {
-  BM_CHECK(setup != nullptr);
-  setup_ = setup;
-  return this;
-}
-
-Benchmark* Benchmark::Teardown(void (*teardown)(const benchmark::State&)) {
-  BM_CHECK(teardown != nullptr);
-  teardown_ = teardown;
-  return this;
-}
-
-Benchmark* Benchmark::RangeMultiplier(int multiplier) {
-  BM_CHECK(multiplier > 1);
-  range_multiplier_ = multiplier;
-  return this;
-}
-
-Benchmark* Benchmark::MinTime(double t) {
-  BM_CHECK(t > 0.0);
-  BM_CHECK(iterations_ == 0);
-  min_time_ = t;
-  return this;
-}
-
-Benchmark* Benchmark::Iterations(IterationCount n) {
-  BM_CHECK(n > 0);
-  BM_CHECK(IsZero(min_time_));
-  iterations_ = n;
-  return this;
-}
-
-Benchmark* Benchmark::Repetitions(int n) {
-  BM_CHECK(n > 0);
-  repetitions_ = n;
-  return this;
-}
-
-Benchmark* Benchmark::ReportAggregatesOnly(bool value) {
-  aggregation_report_mode_ = value ? ARM_ReportAggregatesOnly : ARM_Default;
-  return this;
-}
-
-Benchmark* Benchmark::DisplayAggregatesOnly(bool value) {
-  // If we were called, the report mode is no longer 'unspecified', in any case.
-  aggregation_report_mode_ = static_cast<AggregationReportMode>(
-      aggregation_report_mode_ | ARM_Default);
-
-  if (value) {
-    aggregation_report_mode_ = static_cast<AggregationReportMode>(
-        aggregation_report_mode_ | ARM_DisplayReportAggregatesOnly);
-  } else {
-    aggregation_report_mode_ = static_cast<AggregationReportMode>(
-        aggregation_report_mode_ & ~ARM_DisplayReportAggregatesOnly);
-  }
-
-  return this;
-}
-
-Benchmark* Benchmark::MeasureProcessCPUTime() {
-  // Can be used together with UseRealTime() / UseManualTime().
-  measure_process_cpu_time_ = true;
-  return this;
-}
-
-Benchmark* Benchmark::UseRealTime() {
-  BM_CHECK(!use_manual_time_)
-      << "Cannot set UseRealTime and UseManualTime simultaneously.";
-  use_real_time_ = true;
-  return this;
-}
-
-Benchmark* Benchmark::UseManualTime() {
-  BM_CHECK(!use_real_time_)
-      << "Cannot set UseRealTime and UseManualTime simultaneously.";
-  use_manual_time_ = true;
-  return this;
-}
-
-Benchmark* Benchmark::Complexity(BigO complexity) {
-  complexity_ = complexity;
-  return this;
-}
-
-Benchmark* Benchmark::Complexity(BigOFunc* complexity) {
-  complexity_lambda_ = complexity;
-  complexity_ = oLambda;
-  return this;
-}
-
-Benchmark* Benchmark::ComputeStatistics(const std::string& name,
-                                        StatisticsFunc* statistics,
-                                        StatisticUnit unit) {
-  statistics_.emplace_back(name, statistics, unit);
-  return this;
-}
-
-Benchmark* Benchmark::Threads(int t) {
-  BM_CHECK_GT(t, 0);
-  thread_counts_.push_back(t);
-  return this;
-}
-
-Benchmark* Benchmark::ThreadRange(int min_threads, int max_threads) {
-  BM_CHECK_GT(min_threads, 0);
-  BM_CHECK_GE(max_threads, min_threads);
-
-  AddRange(&thread_counts_, min_threads, max_threads, 2);
-  return this;
-}
-
-Benchmark* Benchmark::DenseThreadRange(int min_threads, int max_threads,
-                                       int stride) {
-  BM_CHECK_GT(min_threads, 0);
-  BM_CHECK_GE(max_threads, min_threads);
-  BM_CHECK_GE(stride, 1);
-
-  for (auto i = min_threads; i < max_threads; i += stride) {
-    thread_counts_.push_back(i);
-  }
-  thread_counts_.push_back(max_threads);
-  return this;
-}
-
-Benchmark* Benchmark::ThreadPerCpu() {
-  thread_counts_.push_back(CPUInfo::Get().num_cpus);
-  return this;
-}
-
-void Benchmark::SetName(const char* name) { name_ = name; }
-
-int Benchmark::ArgsCnt() const {
-  if (args_.empty()) {
-    if (arg_names_.empty()) return -1;
-    return static_cast<int>(arg_names_.size());
-  }
-  return static_cast<int>(args_.front().size());
-}
-
-//=============================================================================//
-//                            FunctionBenchmark
-//=============================================================================//
-
-void FunctionBenchmark::Run(State& st) { func_(st); }
-
-}  // end namespace internal
-
-void ClearRegisteredBenchmarks() {
-  internal::BenchmarkFamilies::GetInstance()->ClearBenchmarks();
-}
-
-std::vector<int64_t> CreateRange(int64_t lo, int64_t hi, int multi) {
-  std::vector<int64_t> args;
-  internal::AddRange(&args, lo, hi, multi);
-  return args;
-}
-
-std::vector<int64_t> CreateDenseRange(int64_t start, int64_t limit, int step) {
-  BM_CHECK_LE(start, limit);
-  std::vector<int64_t> args;
-  for (int64_t arg = start; arg <= limit; arg += step) {
-    args.push_back(arg);
-  }
-  return args;
-}
-
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/benchmark_register.h b/3rdparty/benchmark/src/benchmark_register.h
deleted file mode 100644
index d3f4974e..00000000
--- a/3rdparty/benchmark/src/benchmark_register.h
+++ /dev/null
@@ -1,108 +0,0 @@
-#ifndef BENCHMARK_REGISTER_H
-#define BENCHMARK_REGISTER_H
-
-#include <limits>
-#include <vector>
-
-#include "check.h"
-
-namespace benchmark {
-namespace internal {
-
-// Append the powers of 'mult' in the closed interval [lo, hi].
-// Returns iterator to the start of the inserted range.
-template <typename T>
-typename std::vector<T>::iterator AddPowers(std::vector<T>* dst, T lo, T hi,
-                                            int mult) {
-  BM_CHECK_GE(lo, 0);
-  BM_CHECK_GE(hi, lo);
-  BM_CHECK_GE(mult, 2);
-
-  const size_t start_offset = dst->size();
-
-  static const T kmax = std::numeric_limits<T>::max();
-
-  // Space out the values in multiples of "mult"
-  for (T i = static_cast<T>(1); i <= hi; i *= mult) {
-    if (i >= lo) {
-      dst->push_back(i);
-    }
-    // Break the loop here since multiplying by
-    // 'mult' would move outside of the range of T
-    if (i > kmax / mult) break;
-  }
-
-  return dst->begin() + start_offset;
-}
-
-template <typename T>
-void AddNegatedPowers(std::vector<T>* dst, T lo, T hi, int mult) {
-  // We negate lo and hi so we require that they cannot be equal to 'min'.
-  BM_CHECK_GT(lo, std::numeric_limits<T>::min());
-  BM_CHECK_GT(hi, std::numeric_limits<T>::min());
-  BM_CHECK_GE(hi, lo);
-  BM_CHECK_LE(hi, 0);
-
-  // Add positive powers, then negate and reverse.
-  // Casts necessary since small integers get promoted
-  // to 'int' when negating.
-  const auto lo_complement = static_cast<T>(-lo);
-  const auto hi_complement = static_cast<T>(-hi);
-
-  const auto it = AddPowers(dst, hi_complement, lo_complement, mult);
-
-  std::for_each(it, dst->end(), [](T& t) { t *= -1; });
-  std::reverse(it, dst->end());
-}
-
-template <typename T>
-void AddRange(std::vector<T>* dst, T lo, T hi, int mult) {
-  static_assert(std::is_integral<T>::value && std::is_signed<T>::value,
-                "Args type must be a signed integer");
-
-  BM_CHECK_GE(hi, lo);
-  BM_CHECK_GE(mult, 2);
-
-  // Add "lo"
-  dst->push_back(lo);
-
-  // Handle lo == hi as a special case, so we then know
-  // lo < hi and so it is safe to add 1 to lo and subtract 1
-  // from hi without falling outside of the range of T.
-  if (lo == hi) return;
-
-  // Ensure that lo_inner <= hi_inner below.
-  if (lo + 1 == hi) {
-    dst->push_back(hi);
-    return;
-  }
-
-  // Add all powers of 'mult' in the range [lo+1, hi-1] (inclusive).
-  const auto lo_inner = static_cast<T>(lo + 1);
-  const auto hi_inner = static_cast<T>(hi - 1);
-
-  // Insert negative values
-  if (lo_inner < 0) {
-    AddNegatedPowers(dst, lo_inner, std::min(hi_inner, T{-1}), mult);
-  }
-
-  // Treat 0 as a special case (see discussion on #762).
-  if (lo < 0 && hi >= 0) {
-    dst->push_back(0);
-  }
-
-  // Insert positive values
-  if (hi_inner > 0) {
-    AddPowers(dst, std::max(lo_inner, T{1}), hi_inner, mult);
-  }
-
-  // Add "hi" (if different from last value).
-  if (hi != dst->back()) {
-    dst->push_back(hi);
-  }
-}
-
-}  // namespace internal
-}  // namespace benchmark
-
-#endif  // BENCHMARK_REGISTER_H
diff --git a/3rdparty/benchmark/src/benchmark_runner.cc b/3rdparty/benchmark/src/benchmark_runner.cc
deleted file mode 100644
index eac807b0..00000000
--- a/3rdparty/benchmark/src/benchmark_runner.cc
+++ /dev/null
@@ -1,359 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark_runner.h"
-
-#include "benchmark/benchmark.h"
-#include "benchmark_api_internal.h"
-#include "internal_macros.h"
-
-#ifndef BENCHMARK_OS_WINDOWS
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <unistd.h>
-#endif
-
-#include <algorithm>
-#include <atomic>
-#include <condition_variable>
-#include <cstdio>
-#include <cstdlib>
-#include <fstream>
-#include <iostream>
-#include <memory>
-#include <string>
-#include <thread>
-#include <utility>
-
-#include "check.h"
-#include "colorprint.h"
-#include "commandlineflags.h"
-#include "complexity.h"
-#include "counter.h"
-#include "internal_macros.h"
-#include "log.h"
-#include "mutex.h"
-#include "perf_counters.h"
-#include "re.h"
-#include "statistics.h"
-#include "string_util.h"
-#include "thread_manager.h"
-#include "thread_timer.h"
-
-namespace benchmark {
-
-namespace internal {
-
-MemoryManager* memory_manager = nullptr;
-
-namespace {
-
-static constexpr IterationCount kMaxIterations = 1000000000;
-
-BenchmarkReporter::Run CreateRunReport(
-    const benchmark::internal::BenchmarkInstance& b,
-    const internal::ThreadManager::Result& results,
-    IterationCount memory_iterations,
-    const MemoryManager::Result* memory_result, double seconds,
-    int64_t repetition_index, int64_t repeats) {
-  // Create report about this benchmark run.
-  BenchmarkReporter::Run report;
-
-  report.run_name = b.name();
-  report.family_index = b.family_index();
-  report.per_family_instance_index = b.per_family_instance_index();
-  report.error_occurred = results.has_error_;
-  report.error_message = results.error_message_;
-  report.report_label = results.report_label_;
-  // This is the total iterations across all threads.
-  report.iterations = results.iterations;
-  report.time_unit = b.time_unit();
-  report.threads = b.threads();
-  report.repetition_index = repetition_index;
-  report.repetitions = repeats;
-
-  if (!report.error_occurred) {
-    if (b.use_manual_time()) {
-      report.real_accumulated_time = results.manual_time_used;
-    } else {
-      report.real_accumulated_time = results.real_time_used;
-    }
-    report.cpu_accumulated_time = results.cpu_time_used;
-    report.complexity_n = results.complexity_n;
-    report.complexity = b.complexity();
-    report.complexity_lambda = b.complexity_lambda();
-    report.statistics = &b.statistics();
-    report.counters = results.counters;
-
-    if (memory_iterations > 0) {
-      assert(memory_result != nullptr);
-      report.memory_result = memory_result;
-      report.allocs_per_iter =
-          memory_iterations ? static_cast<double>(memory_result->num_allocs) /
-                                  memory_iterations
-                            : 0;
-    }
-
-    internal::Finish(&report.counters, results.iterations, seconds,
-                     b.threads());
-  }
-  return report;
-}
-
-// Execute one thread of benchmark b for the specified number of iterations.
-// Adds the stats collected for the thread into manager->results.
-void RunInThread(const BenchmarkInstance* b, IterationCount iters,
-                 int thread_id, ThreadManager* manager,
-                 PerfCountersMeasurement* perf_counters_measurement) {
-  internal::ThreadTimer timer(
-      b->measure_process_cpu_time()
-          ? internal::ThreadTimer::CreateProcessCpuTime()
-          : internal::ThreadTimer::Create());
-  State st =
-      b->Run(iters, thread_id, &timer, manager, perf_counters_measurement);
-  BM_CHECK(st.error_occurred() || st.iterations() >= st.max_iterations)
-      << "Benchmark returned before State::KeepRunning() returned false!";
-  {
-    MutexLock l(manager->GetBenchmarkMutex());
-    internal::ThreadManager::Result& results = manager->results;
-    results.iterations += st.iterations();
-    results.cpu_time_used += timer.cpu_time_used();
-    results.real_time_used += timer.real_time_used();
-    results.manual_time_used += timer.manual_time_used();
-    results.complexity_n += st.complexity_length_n();
-    internal::Increment(&results.counters, st.counters);
-  }
-  manager->NotifyThreadComplete();
-}
-
-}  // end namespace
-
-BenchmarkRunner::BenchmarkRunner(
-    const benchmark::internal::BenchmarkInstance& b_,
-    BenchmarkReporter::PerFamilyRunReports* reports_for_family_)
-    : b(b_),
-      reports_for_family(reports_for_family_),
-      min_time(!IsZero(b.min_time()) ? b.min_time() : FLAGS_benchmark_min_time),
-      repeats(b.repetitions() != 0 ? b.repetitions()
-                                   : FLAGS_benchmark_repetitions),
-      has_explicit_iteration_count(b.iterations() != 0),
-      pool(b.threads() - 1),
-      iters(has_explicit_iteration_count ? b.iterations() : 1),
-      perf_counters_measurement(
-          PerfCounters::Create(StrSplit(FLAGS_benchmark_perf_counters, ','))),
-      perf_counters_measurement_ptr(perf_counters_measurement.IsValid()
-                                        ? &perf_counters_measurement
-                                        : nullptr) {
-  run_results.display_report_aggregates_only =
-      (FLAGS_benchmark_report_aggregates_only ||
-       FLAGS_benchmark_display_aggregates_only);
-  run_results.file_report_aggregates_only =
-      FLAGS_benchmark_report_aggregates_only;
-  if (b.aggregation_report_mode() != internal::ARM_Unspecified) {
-    run_results.display_report_aggregates_only =
-        (b.aggregation_report_mode() &
-         internal::ARM_DisplayReportAggregatesOnly);
-    run_results.file_report_aggregates_only =
-        (b.aggregation_report_mode() & internal::ARM_FileReportAggregatesOnly);
-    BM_CHECK(FLAGS_benchmark_perf_counters.empty() ||
-             perf_counters_measurement.IsValid())
-        << "Perf counters were requested but could not be set up.";
-  }
-}
-
-BenchmarkRunner::IterationResults BenchmarkRunner::DoNIterations() {
-  BM_VLOG(2) << "Running " << b.name().str() << " for " << iters << "\n";
-
-  std::unique_ptr<internal::ThreadManager> manager;
-  manager.reset(new internal::ThreadManager(b.threads()));
-
-  // Run all but one thread in separate threads
-  for (std::size_t ti = 0; ti < pool.size(); ++ti) {
-    pool[ti] = std::thread(&RunInThread, &b, iters, static_cast<int>(ti + 1),
-                           manager.get(), perf_counters_measurement_ptr);
-  }
-  // And run one thread here directly.
-  // (If we were asked to run just one thread, we don't create new threads.)
-  // Yes, we need to do this here *after* we start the separate threads.
-  RunInThread(&b, iters, 0, manager.get(), perf_counters_measurement_ptr);
-
-  // The main thread has finished. Now let's wait for the other threads.
-  manager->WaitForAllThreads();
-  for (std::thread& thread : pool) thread.join();
-
-  IterationResults i;
-  // Acquire the measurements/counters from the manager, UNDER THE LOCK!
-  {
-    MutexLock l(manager->GetBenchmarkMutex());
-    i.results = manager->results;
-  }
-
-  // And get rid of the manager.
-  manager.reset();
-
-  // Adjust real/manual time stats since they were reported per thread.
-  i.results.real_time_used /= b.threads();
-  i.results.manual_time_used /= b.threads();
-  // If we were measuring whole-process CPU usage, adjust the CPU time too.
-  if (b.measure_process_cpu_time()) i.results.cpu_time_used /= b.threads();
-
-  BM_VLOG(2) << "Ran in " << i.results.cpu_time_used << "/"
-             << i.results.real_time_used << "\n";
-
-  // By using KeepRunningBatch a benchmark can iterate more times than
-  // requested, so take the iteration count from i.results.
-  i.iters = i.results.iterations / b.threads();
-
-  // Base decisions off of real time if requested by this benchmark.
-  i.seconds = i.results.cpu_time_used;
-  if (b.use_manual_time()) {
-    i.seconds = i.results.manual_time_used;
-  } else if (b.use_real_time()) {
-    i.seconds = i.results.real_time_used;
-  }
-
-  return i;
-}
-
-IterationCount BenchmarkRunner::PredictNumItersNeeded(
-    const IterationResults& i) const {
-  // See how much iterations should be increased by.
-  // Note: Avoid division by zero with max(seconds, 1ns).
-  double multiplier = min_time * 1.4 / std::max(i.seconds, 1e-9);
-  // If our last run was at least 10% of FLAGS_benchmark_min_time then we
-  // use the multiplier directly.
-  // Otherwise we use at most 10 times expansion.
-  // NOTE: When the last run was at least 10% of the min time the max
-  // expansion should be 14x.
-  bool is_significant = (i.seconds / min_time) > 0.1;
-  multiplier = is_significant ? multiplier : 10.0;
-
-  // So what seems to be the sufficiently-large iteration count? Round up.
-  const IterationCount max_next_iters = static_cast<IterationCount>(
-      std::lround(std::max(multiplier * static_cast<double>(i.iters),
-                           static_cast<double>(i.iters) + 1.0)));
-  // But we do have *some* sanity limits though..
-  const IterationCount next_iters = std::min(max_next_iters, kMaxIterations);
-
-  BM_VLOG(3) << "Next iters: " << next_iters << ", " << multiplier << "\n";
-  return next_iters;  // round up before conversion to integer.
-}
-
-bool BenchmarkRunner::ShouldReportIterationResults(
-    const IterationResults& i) const {
-  // Determine if this run should be reported;
-  // Either it has run for a sufficient amount of time
-  // or because an error was reported.
-  return i.results.has_error_ ||
-         i.iters >= kMaxIterations ||  // Too many iterations already.
-         i.seconds >= min_time ||      // The elapsed time is large enough.
-         // CPU time is specified but the elapsed real time greatly exceeds
-         // the minimum time.
-         // Note that user provided timers are except from this sanity check.
-         ((i.results.real_time_used >= 5 * min_time) && !b.use_manual_time());
-}
-
-void BenchmarkRunner::DoOneRepetition() {
-  assert(HasRepeatsRemaining() && "Already done all repetitions?");
-
-  const bool is_the_first_repetition = num_repetitions_done == 0;
-  IterationResults i;
-
-  // We *may* be gradually increasing the length (iteration count)
-  // of the benchmark until we decide the results are significant.
-  // And once we do, we report those last results and exit.
-  // Please do note that the if there are repetitions, the iteration count
-  // is *only* calculated for the *first* repetition, and other repetitions
-  // simply use that precomputed iteration count.
-  for (;;) {
-    b.Setup();
-    i = DoNIterations();
-    b.Teardown();
-
-    // Do we consider the results to be significant?
-    // If we are doing repetitions, and the first repetition was already done,
-    // it has calculated the correct iteration time, so we have run that very
-    // iteration count just now. No need to calculate anything. Just report.
-    // Else, the normal rules apply.
-    const bool results_are_significant = !is_the_first_repetition ||
-                                         has_explicit_iteration_count ||
-                                         ShouldReportIterationResults(i);
-
-    if (results_are_significant) break;  // Good, let's report them!
-
-    // Nope, bad iteration. Let's re-estimate the hopefully-sufficient
-    // iteration count, and run the benchmark again...
-
-    iters = PredictNumItersNeeded(i);
-    assert(iters > i.iters &&
-           "if we did more iterations than we want to do the next time, "
-           "then we should have accepted the current iteration run.");
-  }
-
-  // Oh, one last thing, we need to also produce the 'memory measurements'..
-  MemoryManager::Result* memory_result = nullptr;
-  IterationCount memory_iterations = 0;
-  if (memory_manager != nullptr) {
-    // TODO(vyng): Consider making BenchmarkReporter::Run::memory_result an
-    // optional so we don't have to own the Result here.
-    // Can't do it now due to cxx03.
-    memory_results.push_back(MemoryManager::Result());
-    memory_result = &memory_results.back();
-    // Only run a few iterations to reduce the impact of one-time
-    // allocations in benchmarks that are not properly managed.
-    memory_iterations = std::min<IterationCount>(16, iters);
-    memory_manager->Start();
-    std::unique_ptr<internal::ThreadManager> manager;
-    manager.reset(new internal::ThreadManager(1));
-    b.Setup();
-    RunInThread(&b, memory_iterations, 0, manager.get(),
-                perf_counters_measurement_ptr);
-    manager->WaitForAllThreads();
-    manager.reset();
-    b.Teardown();
-
-    BENCHMARK_DISABLE_DEPRECATED_WARNING
-    memory_manager->Stop(memory_result);
-    BENCHMARK_RESTORE_DEPRECATED_WARNING
-  }
-
-  // Ok, now actually report.
-  BenchmarkReporter::Run report =
-      CreateRunReport(b, i.results, memory_iterations, memory_result, i.seconds,
-                      num_repetitions_done, repeats);
-
-  if (reports_for_family) {
-    ++reports_for_family->num_runs_done;
-    if (!report.error_occurred) reports_for_family->Runs.push_back(report);
-  }
-
-  run_results.non_aggregates.push_back(report);
-
-  ++num_repetitions_done;
-}
-
-RunResults&& BenchmarkRunner::GetResults() {
-  assert(!HasRepeatsRemaining() && "Did not run all repetitions yet?");
-
-  // Calculate additional statistics over the repetitions of this instance.
-  run_results.aggregates_only = ComputeStats(run_results.non_aggregates);
-
-  return std::move(run_results);
-}
-
-}  // end namespace internal
-
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/benchmark_runner.h b/3rdparty/benchmark/src/benchmark_runner.h
deleted file mode 100644
index 752eefdc..00000000
--- a/3rdparty/benchmark/src/benchmark_runner.h
+++ /dev/null
@@ -1,104 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef BENCHMARK_RUNNER_H_
-#define BENCHMARK_RUNNER_H_
-
-#include <thread>
-#include <vector>
-
-#include "benchmark_api_internal.h"
-#include "internal_macros.h"
-#include "perf_counters.h"
-#include "thread_manager.h"
-
-namespace benchmark {
-
-BM_DECLARE_double(benchmark_min_time);
-BM_DECLARE_int32(benchmark_repetitions);
-BM_DECLARE_bool(benchmark_report_aggregates_only);
-BM_DECLARE_bool(benchmark_display_aggregates_only);
-BM_DECLARE_string(benchmark_perf_counters);
-
-namespace internal {
-
-extern MemoryManager* memory_manager;
-
-struct RunResults {
-  std::vector<BenchmarkReporter::Run> non_aggregates;
-  std::vector<BenchmarkReporter::Run> aggregates_only;
-
-  bool display_report_aggregates_only = false;
-  bool file_report_aggregates_only = false;
-};
-
-class BenchmarkRunner {
- public:
-  BenchmarkRunner(const benchmark::internal::BenchmarkInstance& b_,
-                  BenchmarkReporter::PerFamilyRunReports* reports_for_family);
-
-  int GetNumRepeats() const { return repeats; }
-
-  bool HasRepeatsRemaining() const {
-    return GetNumRepeats() != num_repetitions_done;
-  }
-
-  void DoOneRepetition();
-
-  RunResults&& GetResults();
-
-  BenchmarkReporter::PerFamilyRunReports* GetReportsForFamily() const {
-    return reports_for_family;
-  }
-
- private:
-  RunResults run_results;
-
-  const benchmark::internal::BenchmarkInstance& b;
-  BenchmarkReporter::PerFamilyRunReports* reports_for_family;
-
-  const double min_time;
-  const int repeats;
-  const bool has_explicit_iteration_count;
-
-  int num_repetitions_done = 0;
-
-  std::vector<std::thread> pool;
-
-  std::vector<MemoryManager::Result> memory_results;
-
-  IterationCount iters;  // preserved between repetitions!
-  // So only the first repetition has to find/calculate it,
-  // the other repetitions will just use that precomputed iteration count.
-
-  PerfCountersMeasurement perf_counters_measurement;
-  PerfCountersMeasurement* const perf_counters_measurement_ptr;
-
-  struct IterationResults {
-    internal::ThreadManager::Result results;
-    IterationCount iters;
-    double seconds;
-  };
-  IterationResults DoNIterations();
-
-  IterationCount PredictNumItersNeeded(const IterationResults& i) const;
-
-  bool ShouldReportIterationResults(const IterationResults& i) const;
-};
-
-}  // namespace internal
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_RUNNER_H_
diff --git a/3rdparty/benchmark/src/check.h b/3rdparty/benchmark/src/check.h
deleted file mode 100644
index 90c7bbfa..00000000
--- a/3rdparty/benchmark/src/check.h
+++ /dev/null
@@ -1,90 +0,0 @@
-#ifndef CHECK_H_
-#define CHECK_H_
-
-#include <cmath>
-#include <cstdlib>
-#include <ostream>
-
-#include "internal_macros.h"
-#include "log.h"
-
-namespace benchmark {
-namespace internal {
-
-typedef void(AbortHandlerT)();
-
-inline AbortHandlerT*& GetAbortHandler() {
-  static AbortHandlerT* handler = &std::abort;
-  return handler;
-}
-
-BENCHMARK_NORETURN inline void CallAbortHandler() {
-  GetAbortHandler()();
-  std::abort();  // fallback to enforce noreturn
-}
-
-// CheckHandler is the class constructed by failing BM_CHECK macros.
-// CheckHandler will log information about the failures and abort when it is
-// destructed.
-class CheckHandler {
- public:
-  CheckHandler(const char* check, const char* file, const char* func, int line)
-      : log_(GetErrorLogInstance()) {
-    log_ << file << ":" << line << ": " << func << ": Check `" << check
-         << "' failed. ";
-  }
-
-  LogType& GetLog() { return log_; }
-
-#if defined(COMPILER_MSVC)
-#pragma warning(push)
-#pragma warning(disable : 4722)
-#endif
-  BENCHMARK_NORETURN ~CheckHandler() BENCHMARK_NOEXCEPT_OP(false) {
-    log_ << std::endl;
-    CallAbortHandler();
-  }
-#if defined(COMPILER_MSVC)
-#pragma warning(pop)
-#endif
-
-  CheckHandler& operator=(const CheckHandler&) = delete;
-  CheckHandler(const CheckHandler&) = delete;
-  CheckHandler() = delete;
-
- private:
-  LogType& log_;
-};
-
-}  // end namespace internal
-}  // end namespace benchmark
-
-// The BM_CHECK macro returns a std::ostream object that can have extra
-// information written to it.
-#ifndef NDEBUG
-#define BM_CHECK(b)                                                          \
-  (b ? ::benchmark::internal::GetNullLogInstance()                           \
-     : ::benchmark::internal::CheckHandler(#b, __FILE__, __func__, __LINE__) \
-           .GetLog())
-#else
-#define BM_CHECK(b) ::benchmark::internal::GetNullLogInstance()
-#endif
-
-// clang-format off
-// preserve whitespacing between operators for alignment
-#define BM_CHECK_EQ(a, b) BM_CHECK((a) == (b))
-#define BM_CHECK_NE(a, b) BM_CHECK((a) != (b))
-#define BM_CHECK_GE(a, b) BM_CHECK((a) >= (b))
-#define BM_CHECK_LE(a, b) BM_CHECK((a) <= (b))
-#define BM_CHECK_GT(a, b) BM_CHECK((a) > (b))
-#define BM_CHECK_LT(a, b) BM_CHECK((a) < (b))
-
-#define BM_CHECK_FLOAT_EQ(a, b, eps) BM_CHECK(std::fabs((a) - (b)) <  (eps))
-#define BM_CHECK_FLOAT_NE(a, b, eps) BM_CHECK(std::fabs((a) - (b)) >= (eps))
-#define BM_CHECK_FLOAT_GE(a, b, eps) BM_CHECK((a) - (b) > -(eps))
-#define BM_CHECK_FLOAT_LE(a, b, eps) BM_CHECK((b) - (a) > -(eps))
-#define BM_CHECK_FLOAT_GT(a, b, eps) BM_CHECK((a) - (b) >  (eps))
-#define BM_CHECK_FLOAT_LT(a, b, eps) BM_CHECK((b) - (a) >  (eps))
-//clang-format on
-
-#endif  // CHECK_H_
diff --git a/3rdparty/benchmark/src/colorprint.cc b/3rdparty/benchmark/src/colorprint.cc
deleted file mode 100644
index 1a000a06..00000000
--- a/3rdparty/benchmark/src/colorprint.cc
+++ /dev/null
@@ -1,188 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "colorprint.h"
-
-#include <cstdarg>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <memory>
-#include <string>
-
-#include "check.h"
-#include "internal_macros.h"
-
-#ifdef BENCHMARK_OS_WINDOWS
-#include <io.h>
-#include <windows.h>
-#else
-#include <unistd.h>
-#endif  // BENCHMARK_OS_WINDOWS
-
-namespace benchmark {
-namespace {
-#ifdef BENCHMARK_OS_WINDOWS
-typedef WORD PlatformColorCode;
-#else
-typedef const char* PlatformColorCode;
-#endif
-
-PlatformColorCode GetPlatformColorCode(LogColor color) {
-#ifdef BENCHMARK_OS_WINDOWS
-  switch (color) {
-    case COLOR_RED:
-      return FOREGROUND_RED;
-    case COLOR_GREEN:
-      return FOREGROUND_GREEN;
-    case COLOR_YELLOW:
-      return FOREGROUND_RED | FOREGROUND_GREEN;
-    case COLOR_BLUE:
-      return FOREGROUND_BLUE;
-    case COLOR_MAGENTA:
-      return FOREGROUND_BLUE | FOREGROUND_RED;
-    case COLOR_CYAN:
-      return FOREGROUND_BLUE | FOREGROUND_GREEN;
-    case COLOR_WHITE:  // fall through to default
-    default:
-      return 0;
-  }
-#else
-  switch (color) {
-    case COLOR_RED:
-      return "1";
-    case COLOR_GREEN:
-      return "2";
-    case COLOR_YELLOW:
-      return "3";
-    case COLOR_BLUE:
-      return "4";
-    case COLOR_MAGENTA:
-      return "5";
-    case COLOR_CYAN:
-      return "6";
-    case COLOR_WHITE:
-      return "7";
-    default:
-      return nullptr;
-  };
-#endif
-}
-
-}  // end namespace
-
-std::string FormatString(const char* msg, va_list args) {
-  // we might need a second shot at this, so pre-emptivly make a copy
-  va_list args_cp;
-  va_copy(args_cp, args);
-
-  std::size_t size = 256;
-  char local_buff[256];
-  auto ret = vsnprintf(local_buff, size, msg, args_cp);
-
-  va_end(args_cp);
-
-  // currently there is no error handling for failure, so this is hack.
-  BM_CHECK(ret >= 0);
-
-  if (ret == 0)  // handle empty expansion
-    return {};
-  else if (static_cast<size_t>(ret) < size)
-    return local_buff;
-  else {
-    // we did not provide a long enough buffer on our first attempt.
-    size = static_cast<size_t>(ret) + 1;  // + 1 for the null byte
-    std::unique_ptr<char[]> buff(new char[size]);
-    ret = vsnprintf(buff.get(), size, msg, args);
-    BM_CHECK(ret > 0 && (static_cast<size_t>(ret)) < size);
-    return buff.get();
-  }
-}
-
-std::string FormatString(const char* msg, ...) {
-  va_list args;
-  va_start(args, msg);
-  auto tmp = FormatString(msg, args);
-  va_end(args);
-  return tmp;
-}
-
-void ColorPrintf(std::ostream& out, LogColor color, const char* fmt, ...) {
-  va_list args;
-  va_start(args, fmt);
-  ColorPrintf(out, color, fmt, args);
-  va_end(args);
-}
-
-void ColorPrintf(std::ostream& out, LogColor color, const char* fmt,
-                 va_list args) {
-#ifdef BENCHMARK_OS_WINDOWS
-  ((void)out);  // suppress unused warning
-
-  const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
-
-  // Gets the current text color.
-  CONSOLE_SCREEN_BUFFER_INFO buffer_info;
-  GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
-  const WORD old_color_attrs = buffer_info.wAttributes;
-
-  // We need to flush the stream buffers into the console before each
-  // SetConsoleTextAttribute call lest it affect the text that is already
-  // printed but has not yet reached the console.
-  fflush(stdout);
-  SetConsoleTextAttribute(stdout_handle,
-                          GetPlatformColorCode(color) | FOREGROUND_INTENSITY);
-  vprintf(fmt, args);
-
-  fflush(stdout);
-  // Restores the text color.
-  SetConsoleTextAttribute(stdout_handle, old_color_attrs);
-#else
-  const char* color_code = GetPlatformColorCode(color);
-  if (color_code) out << FormatString("\033[0;3%sm", color_code);
-  out << FormatString(fmt, args) << "\033[m";
-#endif
-}
-
-bool IsColorTerminal() {
-#if BENCHMARK_OS_WINDOWS
-  // On Windows the TERM variable is usually not set, but the
-  // console there does support colors.
-  return 0 != _isatty(_fileno(stdout));
-#else
-  // On non-Windows platforms, we rely on the TERM variable. This list of
-  // supported TERM values is copied from Google Test:
-  // <https://github.com/google/googletest/blob/master/googletest/src/gtest.cc#L2925>.
-  const char* const SUPPORTED_TERM_VALUES[] = {
-      "xterm",         "xterm-color",     "xterm-256color",
-      "screen",        "screen-256color", "tmux",
-      "tmux-256color", "rxvt-unicode",    "rxvt-unicode-256color",
-      "linux",         "cygwin",
-  };
-
-  const char* const term = getenv("TERM");
-
-  bool term_supports_color = false;
-  for (const char* candidate : SUPPORTED_TERM_VALUES) {
-    if (term && 0 == strcmp(term, candidate)) {
-      term_supports_color = true;
-      break;
-    }
-  }
-
-  return 0 != isatty(fileno(stdout)) && term_supports_color;
-#endif  // BENCHMARK_OS_WINDOWS
-}
-
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/colorprint.h b/3rdparty/benchmark/src/colorprint.h
deleted file mode 100644
index 9f6fab9b..00000000
--- a/3rdparty/benchmark/src/colorprint.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef BENCHMARK_COLORPRINT_H_
-#define BENCHMARK_COLORPRINT_H_
-
-#include <cstdarg>
-#include <iostream>
-#include <string>
-
-namespace benchmark {
-enum LogColor {
-  COLOR_DEFAULT,
-  COLOR_RED,
-  COLOR_GREEN,
-  COLOR_YELLOW,
-  COLOR_BLUE,
-  COLOR_MAGENTA,
-  COLOR_CYAN,
-  COLOR_WHITE
-};
-
-std::string FormatString(const char* msg, va_list args);
-std::string FormatString(const char* msg, ...);
-
-void ColorPrintf(std::ostream& out, LogColor color, const char* fmt,
-                 va_list args);
-void ColorPrintf(std::ostream& out, LogColor color, const char* fmt, ...);
-
-// Returns true if stdout appears to be a terminal that supports colored
-// output, false otherwise.
-bool IsColorTerminal();
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_COLORPRINT_H_
diff --git a/3rdparty/benchmark/src/commandlineflags.cc b/3rdparty/benchmark/src/commandlineflags.cc
deleted file mode 100644
index 9615e351..00000000
--- a/3rdparty/benchmark/src/commandlineflags.cc
+++ /dev/null
@@ -1,285 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "commandlineflags.h"
-
-#include <algorithm>
-#include <cctype>
-#include <cstdlib>
-#include <cstring>
-#include <iostream>
-#include <limits>
-#include <map>
-#include <utility>
-
-#include "../src/string_util.h"
-
-namespace benchmark {
-namespace {
-
-// Parses 'str' for a 32-bit signed integer.  If successful, writes
-// the result to *value and returns true; otherwise leaves *value
-// unchanged and returns false.
-bool ParseInt32(const std::string& src_text, const char* str, int32_t* value) {
-  // Parses the environment variable as a decimal integer.
-  char* end = nullptr;
-  const long long_value = strtol(str, &end, 10);  // NOLINT
-
-  // Has strtol() consumed all characters in the string?
-  if (*end != '\0') {
-    // No - an invalid character was encountered.
-    std::cerr << src_text << " is expected to be a 32-bit integer, "
-              << "but actually has value \"" << str << "\".\n";
-    return false;
-  }
-
-  // Is the parsed value in the range of an Int32?
-  const int32_t result = static_cast<int32_t>(long_value);
-  if (long_value == std::numeric_limits<long>::max() ||
-      long_value == std::numeric_limits<long>::min() ||
-      // The parsed value overflows as a long.  (strtol() returns
-      // LONG_MAX or LONG_MIN when the input overflows.)
-      result != long_value
-      // The parsed value overflows as an Int32.
-  ) {
-    std::cerr << src_text << " is expected to be a 32-bit integer, "
-              << "but actually has value \"" << str << "\", "
-              << "which overflows.\n";
-    return false;
-  }
-
-  *value = result;
-  return true;
-}
-
-// Parses 'str' for a double.  If successful, writes the result to *value and
-// returns true; otherwise leaves *value unchanged and returns false.
-bool ParseDouble(const std::string& src_text, const char* str, double* value) {
-  // Parses the environment variable as a decimal integer.
-  char* end = nullptr;
-  const double double_value = strtod(str, &end);  // NOLINT
-
-  // Has strtol() consumed all characters in the string?
-  if (*end != '\0') {
-    // No - an invalid character was encountered.
-    std::cerr << src_text << " is expected to be a double, "
-              << "but actually has value \"" << str << "\".\n";
-    return false;
-  }
-
-  *value = double_value;
-  return true;
-}
-
-// Parses 'str' into KV pairs. If successful, writes the result to *value and
-// returns true; otherwise leaves *value unchanged and returns false.
-bool ParseKvPairs(const std::string& src_text, const char* str,
-                  std::map<std::string, std::string>* value) {
-  std::map<std::string, std::string> kvs;
-  for (const auto& kvpair : StrSplit(str, ',')) {
-    const auto kv = StrSplit(kvpair, '=');
-    if (kv.size() != 2) {
-      std::cerr << src_text << " is expected to be a comma-separated list of "
-                << "<key>=<value> strings, but actually has value \"" << str
-                << "\".\n";
-      return false;
-    }
-    if (!kvs.emplace(kv[0], kv[1]).second) {
-      std::cerr << src_text << " is expected to contain unique keys but key \""
-                << kv[0] << "\" was repeated.\n";
-      return false;
-    }
-  }
-
-  *value = kvs;
-  return true;
-}
-
-// Returns the name of the environment variable corresponding to the
-// given flag.  For example, FlagToEnvVar("foo") will return
-// "BENCHMARK_FOO" in the open-source version.
-static std::string FlagToEnvVar(const char* flag) {
-  const std::string flag_str(flag);
-
-  std::string env_var;
-  for (size_t i = 0; i != flag_str.length(); ++i)
-    env_var += static_cast<char>(::toupper(flag_str.c_str()[i]));
-
-  return env_var;
-}
-
-}  // namespace
-
-bool BoolFromEnv(const char* flag, bool default_val) {
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const value_str = getenv(env_var.c_str());
-  return value_str == nullptr ? default_val : IsTruthyFlagValue(value_str);
-}
-
-int32_t Int32FromEnv(const char* flag, int32_t default_val) {
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const value_str = getenv(env_var.c_str());
-  int32_t value = default_val;
-  if (value_str == nullptr ||
-      !ParseInt32(std::string("Environment variable ") + env_var, value_str,
-                  &value)) {
-    return default_val;
-  }
-  return value;
-}
-
-double DoubleFromEnv(const char* flag, double default_val) {
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const value_str = getenv(env_var.c_str());
-  double value = default_val;
-  if (value_str == nullptr ||
-      !ParseDouble(std::string("Environment variable ") + env_var, value_str,
-                   &value)) {
-    return default_val;
-  }
-  return value;
-}
-
-const char* StringFromEnv(const char* flag, const char* default_val) {
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const value = getenv(env_var.c_str());
-  return value == nullptr ? default_val : value;
-}
-
-std::map<std::string, std::string> KvPairsFromEnv(
-    const char* flag, std::map<std::string, std::string> default_val) {
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const value_str = getenv(env_var.c_str());
-
-  if (value_str == nullptr) return default_val;
-
-  std::map<std::string, std::string> value;
-  if (!ParseKvPairs("Environment variable " + env_var, value_str, &value)) {
-    return default_val;
-  }
-  return value;
-}
-
-// Parses a string as a command line flag.  The string should have
-// the format "--flag=value".  When def_optional is true, the "=value"
-// part can be omitted.
-//
-// Returns the value of the flag, or nullptr if the parsing failed.
-const char* ParseFlagValue(const char* str, const char* flag,
-                           bool def_optional) {
-  // str and flag must not be nullptr.
-  if (str == nullptr || flag == nullptr) return nullptr;
-
-  // The flag must start with "--".
-  const std::string flag_str = std::string("--") + std::string(flag);
-  const size_t flag_len = flag_str.length();
-  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
-
-  // Skips the flag name.
-  const char* flag_end = str + flag_len;
-
-  // When def_optional is true, it's OK to not have a "=value" part.
-  if (def_optional && (flag_end[0] == '\0')) return flag_end;
-
-  // If def_optional is true and there are more characters after the
-  // flag name, or if def_optional is false, there must be a '=' after
-  // the flag name.
-  if (flag_end[0] != '=') return nullptr;
-
-  // Returns the string after "=".
-  return flag_end + 1;
-}
-
-bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, true);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Converts the string value to a bool.
-  *value = IsTruthyFlagValue(value_str);
-  return true;
-}
-
-bool ParseInt32Flag(const char* str, const char* flag, int32_t* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  return ParseInt32(std::string("The value of flag --") + flag, value_str,
-                    value);
-}
-
-bool ParseDoubleFlag(const char* str, const char* flag, double* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  return ParseDouble(std::string("The value of flag --") + flag, value_str,
-                     value);
-}
-
-bool ParseStringFlag(const char* str, const char* flag, std::string* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  *value = value_str;
-  return true;
-}
-
-bool ParseKeyValueFlag(const char* str, const char* flag,
-                       std::map<std::string, std::string>* value) {
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  if (value_str == nullptr) return false;
-
-  for (const auto& kvpair : StrSplit(value_str, ',')) {
-    const auto kv = StrSplit(kvpair, '=');
-    if (kv.size() != 2) return false;
-    value->emplace(kv[0], kv[1]);
-  }
-
-  return true;
-}
-
-bool IsFlag(const char* str, const char* flag) {
-  return (ParseFlagValue(str, flag, true) != nullptr);
-}
-
-bool IsTruthyFlagValue(const std::string& value) {
-  if (value.size() == 1) {
-    char v = value[0];
-    return isalnum(v) &&
-           !(v == '0' || v == 'f' || v == 'F' || v == 'n' || v == 'N');
-  } else if (!value.empty()) {
-    std::string value_lower(value);
-    std::transform(value_lower.begin(), value_lower.end(), value_lower.begin(),
-                   [](char c) { return static_cast<char>(::tolower(c)); });
-    return !(value_lower == "false" || value_lower == "no" ||
-             value_lower == "off");
-  } else
-    return true;
-}
-
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/commandlineflags.h b/3rdparty/benchmark/src/commandlineflags.h
deleted file mode 100644
index 5baaf117..00000000
--- a/3rdparty/benchmark/src/commandlineflags.h
+++ /dev/null
@@ -1,116 +0,0 @@
-#ifndef BENCHMARK_COMMANDLINEFLAGS_H_
-#define BENCHMARK_COMMANDLINEFLAGS_H_
-
-#include <cstdint>
-#include <map>
-#include <string>
-
-// Macro for referencing flags.
-#define FLAG(name) FLAGS_##name
-
-// Macros for declaring flags.
-#define BM_DECLARE_bool(name) extern bool FLAG(name)
-#define BM_DECLARE_int32(name) extern int32_t FLAG(name)
-#define BM_DECLARE_double(name) extern double FLAG(name)
-#define BM_DECLARE_string(name) extern std::string FLAG(name)
-#define BM_DECLARE_kvpairs(name) \
-  extern std::map<std::string, std::string> FLAG(name)
-
-// Macros for defining flags.
-#define BM_DEFINE_bool(name, default_val) \
-  bool FLAG(name) = benchmark::BoolFromEnv(#name, default_val)
-#define BM_DEFINE_int32(name, default_val) \
-  int32_t FLAG(name) = benchmark::Int32FromEnv(#name, default_val)
-#define BM_DEFINE_double(name, default_val) \
-  double FLAG(name) = benchmark::DoubleFromEnv(#name, default_val)
-#define BM_DEFINE_string(name, default_val) \
-  std::string FLAG(name) = benchmark::StringFromEnv(#name, default_val)
-#define BM_DEFINE_kvpairs(name, default_val)      \
-  std::map<std::string, std::string> FLAG(name) = \
-      benchmark::KvPairsFromEnv(#name, default_val)
-
-namespace benchmark {
-
-// Parses a bool from the environment variable corresponding to the given flag.
-//
-// If the variable exists, returns IsTruthyFlagValue() value;  if not,
-// returns the given default value.
-bool BoolFromEnv(const char* flag, bool default_val);
-
-// Parses an Int32 from the environment variable corresponding to the given
-// flag.
-//
-// If the variable exists, returns ParseInt32() value;  if not, returns
-// the given default value.
-int32_t Int32FromEnv(const char* flag, int32_t default_val);
-
-// Parses an Double from the environment variable corresponding to the given
-// flag.
-//
-// If the variable exists, returns ParseDouble();  if not, returns
-// the given default value.
-double DoubleFromEnv(const char* flag, double default_val);
-
-// Parses a string from the environment variable corresponding to the given
-// flag.
-//
-// If variable exists, returns its value;  if not, returns
-// the given default value.
-const char* StringFromEnv(const char* flag, const char* default_val);
-
-// Parses a set of kvpairs from the environment variable corresponding to the
-// given flag.
-//
-// If variable exists, returns its value;  if not, returns
-// the given default value.
-std::map<std::string, std::string> KvPairsFromEnv(
-    const char* flag, std::map<std::string, std::string> default_val);
-
-// Parses a string for a bool flag, in the form of either
-// "--flag=value" or "--flag".
-//
-// In the former case, the value is taken as true if it passes IsTruthyValue().
-//
-// In the latter case, the value is taken as true.
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseBoolFlag(const char* str, const char* flag, bool* value);
-
-// Parses a string for an Int32 flag, in the form of "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseInt32Flag(const char* str, const char* flag, int32_t* value);
-
-// Parses a string for a Double flag, in the form of "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseDoubleFlag(const char* str, const char* flag, double* value);
-
-// Parses a string for a string flag, in the form of "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseStringFlag(const char* str, const char* flag, std::string* value);
-
-// Parses a string for a kvpairs flag in the form "--flag=key=value,key=value"
-//
-// On success, stores the value of the flag in *value and returns true. On
-// failure returns false, though *value may have been mutated.
-bool ParseKeyValueFlag(const char* str, const char* flag,
-                       std::map<std::string, std::string>* value);
-
-// Returns true if the string matches the flag.
-bool IsFlag(const char* str, const char* flag);
-
-// Returns true unless value starts with one of: '0', 'f', 'F', 'n' or 'N', or
-// some non-alphanumeric character. Also returns false if the value matches
-// one of 'no', 'false', 'off' (case-insensitive). As a special case, also
-// returns true if value is the empty string.
-bool IsTruthyFlagValue(const std::string& value);
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_COMMANDLINEFLAGS_H_
diff --git a/3rdparty/benchmark/src/complexity.cc b/3rdparty/benchmark/src/complexity.cc
deleted file mode 100644
index 825c5739..00000000
--- a/3rdparty/benchmark/src/complexity.cc
+++ /dev/null
@@ -1,244 +0,0 @@
-// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Source project : https://github.com/ismaelJimenez/cpp.leastsq
-// Adapted to be used with google benchmark
-
-#include "complexity.h"
-
-#include <algorithm>
-#include <cmath>
-
-#include "benchmark/benchmark.h"
-#include "check.h"
-
-namespace benchmark {
-
-// Internal function to calculate the different scalability forms
-BigOFunc* FittingCurve(BigO complexity) {
-  static const double kLog2E = 1.44269504088896340736;
-  switch (complexity) {
-    case oN:
-      return [](IterationCount n) -> double { return static_cast<double>(n); };
-    case oNSquared:
-      return [](IterationCount n) -> double { return std::pow(n, 2); };
-    case oNCubed:
-      return [](IterationCount n) -> double { return std::pow(n, 3); };
-    case oLogN:
-      /* Note: can't use log2 because Android's GNU STL lacks it */
-      return
-          [](IterationCount n) { return kLog2E * log(static_cast<double>(n)); };
-    case oNLogN:
-      /* Note: can't use log2 because Android's GNU STL lacks it */
-      return [](IterationCount n) {
-        return kLog2E * n * log(static_cast<double>(n));
-      };
-    case o1:
-    default:
-      return [](IterationCount) { return 1.0; };
-  }
-}
-
-// Function to return an string for the calculated complexity
-std::string GetBigOString(BigO complexity) {
-  switch (complexity) {
-    case oN:
-      return "N";
-    case oNSquared:
-      return "N^2";
-    case oNCubed:
-      return "N^3";
-    case oLogN:
-      return "lgN";
-    case oNLogN:
-      return "NlgN";
-    case o1:
-      return "(1)";
-    default:
-      return "f(N)";
-  }
-}
-
-// Find the coefficient for the high-order term in the running time, by
-// minimizing the sum of squares of relative error, for the fitting curve
-// given by the lambda expression.
-//   - n             : Vector containing the size of the benchmark tests.
-//   - time          : Vector containing the times for the benchmark tests.
-//   - fitting_curve : lambda expression (e.g. [](int64_t n) {return n; };).
-
-// For a deeper explanation on the algorithm logic, please refer to
-// https://en.wikipedia.org/wiki/Least_squares#Least_squares,_regression_analysis_and_statistics
-
-LeastSq MinimalLeastSq(const std::vector<int64_t>& n,
-                       const std::vector<double>& time,
-                       BigOFunc* fitting_curve) {
-  double sigma_gn_squared = 0.0;
-  double sigma_time = 0.0;
-  double sigma_time_gn = 0.0;
-
-  // Calculate least square fitting parameter
-  for (size_t i = 0; i < n.size(); ++i) {
-    double gn_i = fitting_curve(n[i]);
-    sigma_gn_squared += gn_i * gn_i;
-    sigma_time += time[i];
-    sigma_time_gn += time[i] * gn_i;
-  }
-
-  LeastSq result;
-  result.complexity = oLambda;
-
-  // Calculate complexity.
-  result.coef = sigma_time_gn / sigma_gn_squared;
-
-  // Calculate RMS
-  double rms = 0.0;
-  for (size_t i = 0; i < n.size(); ++i) {
-    double fit = result.coef * fitting_curve(n[i]);
-    rms += pow((time[i] - fit), 2);
-  }
-
-  // Normalized RMS by the mean of the observed values
-  double mean = sigma_time / n.size();
-  result.rms = sqrt(rms / n.size()) / mean;
-
-  return result;
-}
-
-// Find the coefficient for the high-order term in the running time, by
-// minimizing the sum of squares of relative error.
-//   - n          : Vector containing the size of the benchmark tests.
-//   - time       : Vector containing the times for the benchmark tests.
-//   - complexity : If different than oAuto, the fitting curve will stick to
-//                  this one. If it is oAuto, it will be calculated the best
-//                  fitting curve.
-LeastSq MinimalLeastSq(const std::vector<int64_t>& n,
-                       const std::vector<double>& time, const BigO complexity) {
-  BM_CHECK_EQ(n.size(), time.size());
-  BM_CHECK_GE(n.size(), 2);  // Do not compute fitting curve is less than two
-                             // benchmark runs are given
-  BM_CHECK_NE(complexity, oNone);
-
-  LeastSq best_fit;
-
-  if (complexity == oAuto) {
-    std::vector<BigO> fit_curves = {oLogN, oN, oNLogN, oNSquared, oNCubed};
-
-    // Take o1 as default best fitting curve
-    best_fit = MinimalLeastSq(n, time, FittingCurve(o1));
-    best_fit.complexity = o1;
-
-    // Compute all possible fitting curves and stick to the best one
-    for (const auto& fit : fit_curves) {
-      LeastSq current_fit = MinimalLeastSq(n, time, FittingCurve(fit));
-      if (current_fit.rms < best_fit.rms) {
-        best_fit = current_fit;
-        best_fit.complexity = fit;
-      }
-    }
-  } else {
-    best_fit = MinimalLeastSq(n, time, FittingCurve(complexity));
-    best_fit.complexity = complexity;
-  }
-
-  return best_fit;
-}
-
-std::vector<BenchmarkReporter::Run> ComputeBigO(
-    const std::vector<BenchmarkReporter::Run>& reports) {
-  typedef BenchmarkReporter::Run Run;
-  std::vector<Run> results;
-
-  if (reports.size() < 2) return results;
-
-  // Accumulators.
-  std::vector<int64_t> n;
-  std::vector<double> real_time;
-  std::vector<double> cpu_time;
-
-  // Populate the accumulators.
-  for (const Run& run : reports) {
-    BM_CHECK_GT(run.complexity_n, 0)
-        << "Did you forget to call SetComplexityN?";
-    n.push_back(run.complexity_n);
-    real_time.push_back(run.real_accumulated_time / run.iterations);
-    cpu_time.push_back(run.cpu_accumulated_time / run.iterations);
-  }
-
-  LeastSq result_cpu;
-  LeastSq result_real;
-
-  if (reports[0].complexity == oLambda) {
-    result_cpu = MinimalLeastSq(n, cpu_time, reports[0].complexity_lambda);
-    result_real = MinimalLeastSq(n, real_time, reports[0].complexity_lambda);
-  } else {
-    result_cpu = MinimalLeastSq(n, cpu_time, reports[0].complexity);
-    result_real = MinimalLeastSq(n, real_time, result_cpu.complexity);
-  }
-
-  // Drop the 'args' when reporting complexity.
-  auto run_name = reports[0].run_name;
-  run_name.args.clear();
-
-  // Get the data from the accumulator to BenchmarkReporter::Run's.
-  Run big_o;
-  big_o.run_name = run_name;
-  big_o.family_index = reports[0].family_index;
-  big_o.per_family_instance_index = reports[0].per_family_instance_index;
-  big_o.run_type = BenchmarkReporter::Run::RT_Aggregate;
-  big_o.repetitions = reports[0].repetitions;
-  big_o.repetition_index = Run::no_repetition_index;
-  big_o.threads = reports[0].threads;
-  big_o.aggregate_name = "BigO";
-  big_o.aggregate_unit = StatisticUnit::kTime;
-  big_o.report_label = reports[0].report_label;
-  big_o.iterations = 0;
-  big_o.real_accumulated_time = result_real.coef;
-  big_o.cpu_accumulated_time = result_cpu.coef;
-  big_o.report_big_o = true;
-  big_o.complexity = result_cpu.complexity;
-
-  // All the time results are reported after being multiplied by the
-  // time unit multiplier. But since RMS is a relative quantity it
-  // should not be multiplied at all. So, here, we _divide_ it by the
-  // multiplier so that when it is multiplied later the result is the
-  // correct one.
-  double multiplier = GetTimeUnitMultiplier(reports[0].time_unit);
-
-  // Only add label to mean/stddev if it is same for all runs
-  Run rms;
-  rms.run_name = run_name;
-  rms.family_index = reports[0].family_index;
-  rms.per_family_instance_index = reports[0].per_family_instance_index;
-  rms.run_type = BenchmarkReporter::Run::RT_Aggregate;
-  rms.aggregate_name = "RMS";
-  rms.aggregate_unit = StatisticUnit::kPercentage;
-  rms.report_label = big_o.report_label;
-  rms.iterations = 0;
-  rms.repetition_index = Run::no_repetition_index;
-  rms.repetitions = reports[0].repetitions;
-  rms.threads = reports[0].threads;
-  rms.real_accumulated_time = result_real.rms / multiplier;
-  rms.cpu_accumulated_time = result_cpu.rms / multiplier;
-  rms.report_rms = true;
-  rms.complexity = result_cpu.complexity;
-  // don't forget to keep the time unit, or we won't be able to
-  // recover the correct value.
-  rms.time_unit = reports[0].time_unit;
-
-  results.push_back(big_o);
-  results.push_back(rms);
-  return results;
-}
-
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/complexity.h b/3rdparty/benchmark/src/complexity.h
deleted file mode 100644
index df29b48d..00000000
--- a/3rdparty/benchmark/src/complexity.h
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Source project : https://github.com/ismaelJimenez/cpp.leastsq
-// Adapted to be used with google benchmark
-
-#ifndef COMPLEXITY_H_
-#define COMPLEXITY_H_
-
-#include <string>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-
-namespace benchmark {
-
-// Return a vector containing the bigO and RMS information for the specified
-// list of reports. If 'reports.size() < 2' an empty vector is returned.
-std::vector<BenchmarkReporter::Run> ComputeBigO(
-    const std::vector<BenchmarkReporter::Run>& reports);
-
-// This data structure will contain the result returned by MinimalLeastSq
-//   - coef        : Estimated coeficient for the high-order term as
-//                   interpolated from data.
-//   - rms         : Normalized Root Mean Squared Error.
-//   - complexity  : Scalability form (e.g. oN, oNLogN). In case a scalability
-//                   form has been provided to MinimalLeastSq this will return
-//                   the same value. In case BigO::oAuto has been selected, this
-//                   parameter will return the best fitting curve detected.
-
-struct LeastSq {
-  LeastSq() : coef(0.0), rms(0.0), complexity(oNone) {}
-
-  double coef;
-  double rms;
-  BigO complexity;
-};
-
-// Function to return an string for the calculated complexity
-std::string GetBigOString(BigO complexity);
-
-}  // end namespace benchmark
-
-#endif  // COMPLEXITY_H_
diff --git a/3rdparty/benchmark/src/console_reporter.cc b/3rdparty/benchmark/src/console_reporter.cc
deleted file mode 100644
index 04cc0b74..00000000
--- a/3rdparty/benchmark/src/console_reporter.cc
+++ /dev/null
@@ -1,190 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <algorithm>
-#include <cstdint>
-#include <cstdio>
-#include <cstring>
-#include <iostream>
-#include <string>
-#include <tuple>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "check.h"
-#include "colorprint.h"
-#include "commandlineflags.h"
-#include "complexity.h"
-#include "counter.h"
-#include "internal_macros.h"
-#include "string_util.h"
-#include "timers.h"
-
-namespace benchmark {
-
-bool ConsoleReporter::ReportContext(const Context& context) {
-  name_field_width_ = context.name_field_width;
-  printed_header_ = false;
-  prev_counters_.clear();
-
-  PrintBasicContext(&GetErrorStream(), context);
-
-#ifdef BENCHMARK_OS_WINDOWS
-  if ((output_options_ & OO_Color) && &std::cout != &GetOutputStream()) {
-    GetErrorStream()
-        << "Color printing is only supported for stdout on windows."
-           " Disabling color printing\n";
-    output_options_ = static_cast<OutputOptions>(output_options_ & ~OO_Color);
-  }
-#endif
-
-  return true;
-}
-
-void ConsoleReporter::PrintHeader(const Run& run) {
-  std::string str =
-      FormatString("%-*s %13s %15s %12s", static_cast<int>(name_field_width_),
-                   "Benchmark", "Time", "CPU", "Iterations");
-  if (!run.counters.empty()) {
-    if (output_options_ & OO_Tabular) {
-      for (auto const& c : run.counters) {
-        str += FormatString(" %10s", c.first.c_str());
-      }
-    } else {
-      str += " UserCounters...";
-    }
-  }
-  std::string line = std::string(str.length(), '-');
-  GetOutputStream() << line << "\n" << str << "\n" << line << "\n";
-}
-
-void ConsoleReporter::ReportRuns(const std::vector<Run>& reports) {
-  for (const auto& run : reports) {
-    // print the header:
-    // --- if none was printed yet
-    bool print_header = !printed_header_;
-    // --- or if the format is tabular and this run
-    //     has different fields from the prev header
-    print_header |= (output_options_ & OO_Tabular) &&
-                    (!internal::SameNames(run.counters, prev_counters_));
-    if (print_header) {
-      printed_header_ = true;
-      prev_counters_ = run.counters;
-      PrintHeader(run);
-    }
-    // As an alternative to printing the headers like this, we could sort
-    // the benchmarks by header and then print. But this would require
-    // waiting for the full results before printing, or printing twice.
-    PrintRunData(run);
-  }
-}
-
-static void IgnoreColorPrint(std::ostream& out, LogColor, const char* fmt,
-                             ...) {
-  va_list args;
-  va_start(args, fmt);
-  out << FormatString(fmt, args);
-  va_end(args);
-}
-
-static std::string FormatTime(double time) {
-  // Align decimal places...
-  if (time < 1.0) {
-    return FormatString("%10.3f", time);
-  }
-  if (time < 10.0) {
-    return FormatString("%10.2f", time);
-  }
-  if (time < 100.0) {
-    return FormatString("%10.1f", time);
-  }
-  return FormatString("%10.0f", time);
-}
-
-void ConsoleReporter::PrintRunData(const Run& result) {
-  typedef void(PrinterFn)(std::ostream&, LogColor, const char*, ...);
-  auto& Out = GetOutputStream();
-  PrinterFn* printer = (output_options_ & OO_Color)
-                           ? static_cast<PrinterFn*>(ColorPrintf)
-                           : IgnoreColorPrint;
-  auto name_color =
-      (result.report_big_o || result.report_rms) ? COLOR_BLUE : COLOR_GREEN;
-  printer(Out, name_color, "%-*s ", name_field_width_,
-          result.benchmark_name().c_str());
-
-  if (result.error_occurred) {
-    printer(Out, COLOR_RED, "ERROR OCCURRED: \'%s\'",
-            result.error_message.c_str());
-    printer(Out, COLOR_DEFAULT, "\n");
-    return;
-  }
-
-  const double real_time = result.GetAdjustedRealTime();
-  const double cpu_time = result.GetAdjustedCPUTime();
-  const std::string real_time_str = FormatTime(real_time);
-  const std::string cpu_time_str = FormatTime(cpu_time);
-
-  if (result.report_big_o) {
-    std::string big_o = GetBigOString(result.complexity);
-    printer(Out, COLOR_YELLOW, "%10.2f %-4s %10.2f %-4s ", real_time,
-            big_o.c_str(), cpu_time, big_o.c_str());
-  } else if (result.report_rms) {
-    printer(Out, COLOR_YELLOW, "%10.0f %-4s %10.0f %-4s ", real_time * 100, "%",
-            cpu_time * 100, "%");
-  } else if (result.run_type != Run::RT_Aggregate ||
-             result.aggregate_unit == StatisticUnit::kTime) {
-    const char* timeLabel = GetTimeUnitString(result.time_unit);
-    printer(Out, COLOR_YELLOW, "%s %-4s %s %-4s ", real_time_str.c_str(),
-            timeLabel, cpu_time_str.c_str(), timeLabel);
-  } else {
-    assert(result.aggregate_unit == StatisticUnit::kPercentage);
-    printer(Out, COLOR_YELLOW, "%10.2f %-4s %10.2f %-4s ",
-            (100. * result.real_accumulated_time), "%",
-            (100. * result.cpu_accumulated_time), "%");
-  }
-
-  if (!result.report_big_o && !result.report_rms) {
-    printer(Out, COLOR_CYAN, "%10lld", result.iterations);
-  }
-
-  for (auto& c : result.counters) {
-    const std::size_t cNameLen =
-        std::max(std::string::size_type(10), c.first.length());
-    std::string s;
-    const char* unit = "";
-    if (result.run_type == Run::RT_Aggregate &&
-        result.aggregate_unit == StatisticUnit::kPercentage) {
-      s = StrFormat("%.2f", 100. * c.second.value);
-      unit = "%";
-    } else {
-      s = HumanReadableNumber(c.second.value, c.second.oneK);
-      if (c.second.flags & Counter::kIsRate)
-        unit = (c.second.flags & Counter::kInvert) ? "s" : "/s";
-    }
-    if (output_options_ & OO_Tabular) {
-      printer(Out, COLOR_DEFAULT, " %*s%s", cNameLen - strlen(unit), s.c_str(),
-              unit);
-    } else {
-      printer(Out, COLOR_DEFAULT, " %s=%s%s", c.first.c_str(), s.c_str(), unit);
-    }
-  }
-
-  if (!result.report_label.empty()) {
-    printer(Out, COLOR_DEFAULT, " %s", result.report_label.c_str());
-  }
-
-  printer(Out, COLOR_DEFAULT, "\n");
-}
-
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/counter.cc b/3rdparty/benchmark/src/counter.cc
deleted file mode 100644
index cf5b78ee..00000000
--- a/3rdparty/benchmark/src/counter.cc
+++ /dev/null
@@ -1,80 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "counter.h"
-
-namespace benchmark {
-namespace internal {
-
-double Finish(Counter const& c, IterationCount iterations, double cpu_time,
-              double num_threads) {
-  double v = c.value;
-  if (c.flags & Counter::kIsRate) {
-    v /= cpu_time;
-  }
-  if (c.flags & Counter::kAvgThreads) {
-    v /= num_threads;
-  }
-  if (c.flags & Counter::kIsIterationInvariant) {
-    v *= iterations;
-  }
-  if (c.flags & Counter::kAvgIterations) {
-    v /= iterations;
-  }
-
-  if (c.flags & Counter::kInvert) {  // Invert is *always* last.
-    v = 1.0 / v;
-  }
-  return v;
-}
-
-void Finish(UserCounters* l, IterationCount iterations, double cpu_time,
-            double num_threads) {
-  for (auto& c : *l) {
-    c.second.value = Finish(c.second, iterations, cpu_time, num_threads);
-  }
-}
-
-void Increment(UserCounters* l, UserCounters const& r) {
-  // add counters present in both or just in *l
-  for (auto& c : *l) {
-    auto it = r.find(c.first);
-    if (it != r.end()) {
-      c.second.value = c.second + it->second;
-    }
-  }
-  // add counters present in r, but not in *l
-  for (auto const& tc : r) {
-    auto it = l->find(tc.first);
-    if (it == l->end()) {
-      (*l)[tc.first] = tc.second;
-    }
-  }
-}
-
-bool SameNames(UserCounters const& l, UserCounters const& r) {
-  if (&l == &r) return true;
-  if (l.size() != r.size()) {
-    return false;
-  }
-  for (auto const& c : l) {
-    if (r.find(c.first) == r.end()) {
-      return false;
-    }
-  }
-  return true;
-}
-
-}  // end namespace internal
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/counter.h b/3rdparty/benchmark/src/counter.h
deleted file mode 100644
index 1f5a58e3..00000000
--- a/3rdparty/benchmark/src/counter.h
+++ /dev/null
@@ -1,32 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef BENCHMARK_COUNTER_H_
-#define BENCHMARK_COUNTER_H_
-
-#include "benchmark/benchmark.h"
-
-namespace benchmark {
-
-// these counter-related functions are hidden to reduce API surface.
-namespace internal {
-void Finish(UserCounters* l, IterationCount iterations, double time,
-            double num_threads);
-void Increment(UserCounters* l, UserCounters const& r);
-bool SameNames(UserCounters const& l, UserCounters const& r);
-}  // end namespace internal
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_COUNTER_H_
diff --git a/3rdparty/benchmark/src/csv_reporter.cc b/3rdparty/benchmark/src/csv_reporter.cc
deleted file mode 100644
index 1c5e9fa6..00000000
--- a/3rdparty/benchmark/src/csv_reporter.cc
+++ /dev/null
@@ -1,158 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <algorithm>
-#include <cstdint>
-#include <iostream>
-#include <string>
-#include <tuple>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "check.h"
-#include "complexity.h"
-#include "string_util.h"
-#include "timers.h"
-
-// File format reference: http://edoceo.com/utilitas/csv-file-format.
-
-namespace benchmark {
-
-namespace {
-std::vector<std::string> elements = {
-    "name",           "iterations",       "real_time",        "cpu_time",
-    "time_unit",      "bytes_per_second", "items_per_second", "label",
-    "error_occurred", "error_message"};
-}  // namespace
-
-std::string CsvEscape(const std::string& s) {
-  std::string tmp;
-  tmp.reserve(s.size() + 2);
-  for (char c : s) {
-    switch (c) {
-      case '"':
-        tmp += "\"\"";
-        break;
-      default:
-        tmp += c;
-        break;
-    }
-  }
-  return '"' + tmp + '"';
-}
-
-bool CSVReporter::ReportContext(const Context& context) {
-  PrintBasicContext(&GetErrorStream(), context);
-  return true;
-}
-
-void CSVReporter::ReportRuns(const std::vector<Run>& reports) {
-  std::ostream& Out = GetOutputStream();
-
-  if (!printed_header_) {
-    // save the names of all the user counters
-    for (const auto& run : reports) {
-      for (const auto& cnt : run.counters) {
-        if (cnt.first == "bytes_per_second" || cnt.first == "items_per_second")
-          continue;
-        user_counter_names_.insert(cnt.first);
-      }
-    }
-
-    // print the header
-    for (auto B = elements.begin(); B != elements.end();) {
-      Out << *B++;
-      if (B != elements.end()) Out << ",";
-    }
-    for (auto B = user_counter_names_.begin();
-         B != user_counter_names_.end();) {
-      Out << ",\"" << *B++ << "\"";
-    }
-    Out << "\n";
-
-    printed_header_ = true;
-  } else {
-    // check that all the current counters are saved in the name set
-    for (const auto& run : reports) {
-      for (const auto& cnt : run.counters) {
-        if (cnt.first == "bytes_per_second" || cnt.first == "items_per_second")
-          continue;
-        BM_CHECK(user_counter_names_.find(cnt.first) !=
-                 user_counter_names_.end())
-            << "All counters must be present in each run. "
-            << "Counter named \"" << cnt.first
-            << "\" was not in a run after being added to the header";
-      }
-    }
-  }
-
-  // print results for each run
-  for (const auto& run : reports) {
-    PrintRunData(run);
-  }
-}
-
-void CSVReporter::PrintRunData(const Run& run) {
-  std::ostream& Out = GetOutputStream();
-  Out << CsvEscape(run.benchmark_name()) << ",";
-  if (run.error_occurred) {
-    Out << std::string(elements.size() - 3, ',');
-    Out << "true,";
-    Out << CsvEscape(run.error_message) << "\n";
-    return;
-  }
-
-  // Do not print iteration on bigO and RMS report
-  if (!run.report_big_o && !run.report_rms) {
-    Out << run.iterations;
-  }
-  Out << ",";
-
-  Out << run.GetAdjustedRealTime() << ",";
-  Out << run.GetAdjustedCPUTime() << ",";
-
-  // Do not print timeLabel on bigO and RMS report
-  if (run.report_big_o) {
-    Out << GetBigOString(run.complexity);
-  } else if (!run.report_rms) {
-    Out << GetTimeUnitString(run.time_unit);
-  }
-  Out << ",";
-
-  if (run.counters.find("bytes_per_second") != run.counters.end()) {
-    Out << run.counters.at("bytes_per_second");
-  }
-  Out << ",";
-  if (run.counters.find("items_per_second") != run.counters.end()) {
-    Out << run.counters.at("items_per_second");
-  }
-  Out << ",";
-  if (!run.report_label.empty()) {
-    Out << CsvEscape(run.report_label);
-  }
-  Out << ",,";  // for error_occurred and error_message
-
-  // Print user counters
-  for (const auto& ucn : user_counter_names_) {
-    auto it = run.counters.find(ucn);
-    if (it == run.counters.end()) {
-      Out << ",";
-    } else {
-      Out << "," << it->second;
-    }
-  }
-  Out << '\n';
-}
-
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/cycleclock.h b/3rdparty/benchmark/src/cycleclock.h
deleted file mode 100644
index d65d32a3..00000000
--- a/3rdparty/benchmark/src/cycleclock.h
+++ /dev/null
@@ -1,225 +0,0 @@
-// ----------------------------------------------------------------------
-// CycleClock
-//    A CycleClock tells you the current time in Cycles.  The "time"
-//    is actually time since power-on.  This is like time() but doesn't
-//    involve a system call and is much more precise.
-//
-// NOTE: Not all cpu/platform/kernel combinations guarantee that this
-// clock increments at a constant rate or is synchronized across all logical
-// cpus in a system.
-//
-// If you need the above guarantees, please consider using a different
-// API. There are efforts to provide an interface which provides a millisecond
-// granularity and implemented as a memory read. A memory read is generally
-// cheaper than the CycleClock for many architectures.
-//
-// Also, in some out of order CPU implementations, the CycleClock is not
-// serializing. So if you're trying to count at cycles granularity, your
-// data might be inaccurate due to out of order instruction execution.
-// ----------------------------------------------------------------------
-
-#ifndef BENCHMARK_CYCLECLOCK_H_
-#define BENCHMARK_CYCLECLOCK_H_
-
-#include <cstdint>
-
-#include "benchmark/benchmark.h"
-#include "internal_macros.h"
-
-#if defined(BENCHMARK_OS_MACOSX)
-#include <mach/mach_time.h>
-#endif
-// For MSVC, we want to use '_asm rdtsc' when possible (since it works
-// with even ancient MSVC compilers), and when not possible the
-// __rdtsc intrinsic, declared in <intrin.h>.  Unfortunately, in some
-// environments, <windows.h> and <intrin.h> have conflicting
-// declarations of some other intrinsics, breaking compilation.
-// Therefore, we simply declare __rdtsc ourselves. See also
-// http://connect.microsoft.com/VisualStudio/feedback/details/262047
-#if defined(COMPILER_MSVC) && !defined(_M_IX86) && !defined(_M_ARM64)
-extern "C" uint64_t __rdtsc();
-#pragma intrinsic(__rdtsc)
-#endif
-
-#if !defined(BENCHMARK_OS_WINDOWS) || defined(BENCHMARK_OS_MINGW)
-#include <sys/time.h>
-#include <time.h>
-#endif
-
-#ifdef BENCHMARK_OS_EMSCRIPTEN
-#include <emscripten.h>
-#endif
-
-namespace benchmark {
-// NOTE: only i386 and x86_64 have been well tested.
-// PPC, sparc, alpha, and ia64 are based on
-//    http://peter.kuscsik.com/wordpress/?p=14
-// with modifications by m3b.  See also
-//    https://setisvn.ssl.berkeley.edu/svn/lib/fftw-3.0.1/kernel/cycle.h
-namespace cycleclock {
-// This should return the number of cycles since power-on.  Thread-safe.
-inline BENCHMARK_ALWAYS_INLINE int64_t Now() {
-#if defined(BENCHMARK_OS_MACOSX)
-  // this goes at the top because we need ALL Macs, regardless of
-  // architecture, to return the number of "mach time units" that
-  // have passed since startup.  See sysinfo.cc where
-  // InitializeSystemInfo() sets the supposed cpu clock frequency of
-  // macs to the number of mach time units per second, not actual
-  // CPU clock frequency (which can change in the face of CPU
-  // frequency scaling).  Also note that when the Mac sleeps, this
-  // counter pauses; it does not continue counting, nor does it
-  // reset to zero.
-  return mach_absolute_time();
-#elif defined(BENCHMARK_OS_EMSCRIPTEN)
-  // this goes above x86-specific code because old versions of Emscripten
-  // define __x86_64__, although they have nothing to do with it.
-  return static_cast<int64_t>(emscripten_get_now() * 1e+6);
-#elif defined(__i386__)
-  int64_t ret;
-  __asm__ volatile("rdtsc" : "=A"(ret));
-  return ret;
-#elif defined(__x86_64__) || defined(__amd64__)
-  uint64_t low, high;
-  __asm__ volatile("rdtsc" : "=a"(low), "=d"(high));
-  return (high << 32) | low;
-#elif defined(__powerpc__) || defined(__ppc__)
-  // This returns a time-base, which is not always precisely a cycle-count.
-#if defined(__powerpc64__) || defined(__ppc64__)
-  int64_t tb;
-  asm volatile("mfspr %0, 268" : "=r"(tb));
-  return tb;
-#else
-  uint32_t tbl, tbu0, tbu1;
-  asm volatile(
-      "mftbu %0\n"
-      "mftb %1\n"
-      "mftbu %2"
-      : "=r"(tbu0), "=r"(tbl), "=r"(tbu1));
-  tbl &= -static_cast<int32_t>(tbu0 == tbu1);
-  // high 32 bits in tbu1; low 32 bits in tbl  (tbu0 is no longer needed)
-  return (static_cast<uint64_t>(tbu1) << 32) | tbl;
-#endif
-#elif defined(__sparc__)
-  int64_t tick;
-  asm(".byte 0x83, 0x41, 0x00, 0x00");
-  asm("mov   %%g1, %0" : "=r"(tick));
-  return tick;
-#elif defined(__ia64__)
-  int64_t itc;
-  asm("mov %0 = ar.itc" : "=r"(itc));
-  return itc;
-#elif defined(COMPILER_MSVC) && defined(_M_IX86)
-  // Older MSVC compilers (like 7.x) don't seem to support the
-  // __rdtsc intrinsic properly, so I prefer to use _asm instead
-  // when I know it will work.  Otherwise, I'll use __rdtsc and hope
-  // the code is being compiled with a non-ancient compiler.
-  _asm rdtsc
-#elif defined(COMPILER_MSVC) && defined(_M_ARM64)
-  // See // https://docs.microsoft.com/en-us/cpp/intrinsics/arm64-intrinsics
-  // and https://reviews.llvm.org/D53115
-  int64_t virtual_timer_value;
-  virtual_timer_value = _ReadStatusReg(ARM64_CNTVCT);
-  return virtual_timer_value;
-#elif defined(COMPILER_MSVC)
-  return __rdtsc();
-#elif defined(BENCHMARK_OS_NACL)
-  // Native Client validator on x86/x86-64 allows RDTSC instructions,
-  // and this case is handled above. Native Client validator on ARM
-  // rejects MRC instructions (used in the ARM-specific sequence below),
-  // so we handle it here. Portable Native Client compiles to
-  // architecture-agnostic bytecode, which doesn't provide any
-  // cycle counter access mnemonics.
-
-  // Native Client does not provide any API to access cycle counter.
-  // Use clock_gettime(CLOCK_MONOTONIC, ...) instead of gettimeofday
-  // because is provides nanosecond resolution (which is noticable at
-  // least for PNaCl modules running on x86 Mac & Linux).
-  // Initialize to always return 0 if clock_gettime fails.
-  struct timespec ts = {0, 0};
-  clock_gettime(CLOCK_MONOTONIC, &ts);
-  return static_cast<int64_t>(ts.tv_sec) * 1000000000 + ts.tv_nsec;
-#elif defined(__aarch64__)
-  // System timer of ARMv8 runs at a different frequency than the CPU's.
-  // The frequency is fixed, typically in the range 1-50MHz.  It can be
-  // read at CNTFRQ special register.  We assume the OS has set up
-  // the virtual timer properly.
-  int64_t virtual_timer_value;
-  asm volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer_value));
-  return virtual_timer_value;
-#elif defined(__ARM_ARCH)
-  // V6 is the earliest arch that has a standard cyclecount
-  // Native Client validator doesn't allow MRC instructions.
-#if (__ARM_ARCH >= 6)
-  uint32_t pmccntr;
-  uint32_t pmuseren;
-  uint32_t pmcntenset;
-  // Read the user mode perf monitor counter access permissions.
-  asm volatile("mrc p15, 0, %0, c9, c14, 0" : "=r"(pmuseren));
-  if (pmuseren & 1) {  // Allows reading perfmon counters for user mode code.
-    asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r"(pmcntenset));
-    if (pmcntenset & 0x80000000ul) {  // Is it counting?
-      asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r"(pmccntr));
-      // The counter is set up to count every 64th cycle
-      return static_cast<int64_t>(pmccntr) * 64;  // Should optimize to << 6
-    }
-  }
-#endif
-  struct timeval tv;
-  gettimeofday(&tv, nullptr);
-  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
-#elif defined(__mips__) || defined(__m68k__)
-  // mips apparently only allows rdtsc for superusers, so we fall
-  // back to gettimeofday.  It's possible clock_gettime would be better.
-  struct timeval tv;
-  gettimeofday(&tv, nullptr);
-  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
-#elif defined(__loongarch__)
-  struct timeval tv;
-  gettimeofday(&tv, nullptr);
-  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
-#elif defined(__s390__)  // Covers both s390 and s390x.
-  // Return the CPU clock.
-  uint64_t tsc;
-#if defined(BENCHMARK_OS_ZOS) && defined(COMPILER_IBMXL)
-  // z/OS XL compiler HLASM syntax.
-  asm(" stck %0" : "=m"(tsc) : : "cc");
-#else
-  asm("stck %0" : "=Q"(tsc) : : "cc");
-#endif
-  return tsc;
-#elif defined(__riscv)  // RISC-V
-  // Use RDCYCLE (and RDCYCLEH on riscv32)
-#if __riscv_xlen == 32
-  uint32_t cycles_lo, cycles_hi0, cycles_hi1;
-  // This asm also includes the PowerPC overflow handling strategy, as above.
-  // Implemented in assembly because Clang insisted on branching.
-  asm volatile(
-      "rdcycleh %0\n"
-      "rdcycle %1\n"
-      "rdcycleh %2\n"
-      "sub %0, %0, %2\n"
-      "seqz %0, %0\n"
-      "sub %0, zero, %0\n"
-      "and %1, %1, %0\n"
-      : "=r"(cycles_hi0), "=r"(cycles_lo), "=r"(cycles_hi1));
-  return (static_cast<uint64_t>(cycles_hi1) << 32) | cycles_lo;
-#else
-  uint64_t cycles;
-  asm volatile("rdcycle %0" : "=r"(cycles));
-  return cycles;
-#endif
-#elif defined(__e2k__) || defined(__elbrus__)
-  struct timeval tv;
-  gettimeofday(&tv, nullptr);
-  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
-#else
-// The soft failover to a generic implementation is automatic only for ARM.
-// For other platforms the developer is expected to make an attempt to create
-// a fast implementation and use generic version if nothing better is available.
-#error You need to define CycleTimer for your OS and CPU
-#endif
-}
-}  // end namespace cycleclock
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_CYCLECLOCK_H_
diff --git a/3rdparty/benchmark/src/internal_macros.h b/3rdparty/benchmark/src/internal_macros.h
deleted file mode 100644
index 91f367b8..00000000
--- a/3rdparty/benchmark/src/internal_macros.h
+++ /dev/null
@@ -1,102 +0,0 @@
-#ifndef BENCHMARK_INTERNAL_MACROS_H_
-#define BENCHMARK_INTERNAL_MACROS_H_
-
-#include "benchmark/benchmark.h"
-
-/* Needed to detect STL */
-#include <cstdlib>
-
-// clang-format off
-
-#ifndef __has_feature
-#define __has_feature(x) 0
-#endif
-
-#if defined(__clang__)
-  #if defined(__ibmxl__)
-    #if !defined(COMPILER_IBMXL)
-      #define COMPILER_IBMXL
-    #endif
-  #elif !defined(COMPILER_CLANG)
-    #define COMPILER_CLANG
-  #endif
-#elif defined(_MSC_VER)
-  #if !defined(COMPILER_MSVC)
-    #define COMPILER_MSVC
-  #endif
-#elif defined(__GNUC__)
-  #if !defined(COMPILER_GCC)
-    #define COMPILER_GCC
-  #endif
-#endif
-
-#if __has_feature(cxx_attributes)
-  #define BENCHMARK_NORETURN [[noreturn]]
-#elif defined(__GNUC__)
-  #define BENCHMARK_NORETURN __attribute__((noreturn))
-#elif defined(COMPILER_MSVC)
-  #define BENCHMARK_NORETURN __declspec(noreturn)
-#else
-  #define BENCHMARK_NORETURN
-#endif
-
-#if defined(__CYGWIN__)
-  #define BENCHMARK_OS_CYGWIN 1
-#elif defined(_WIN32)
-  #define BENCHMARK_OS_WINDOWS 1
-  #if defined(__MINGW32__)
-    #define BENCHMARK_OS_MINGW 1
-  #endif
-#elif defined(__APPLE__)
-  #define BENCHMARK_OS_APPLE 1
-  #include "TargetConditionals.h"
-  #if defined(TARGET_OS_MAC)
-    #define BENCHMARK_OS_MACOSX 1
-    #if defined(TARGET_OS_IPHONE)
-      #define BENCHMARK_OS_IOS 1
-    #endif
-  #endif
-#elif defined(__FreeBSD__)
-  #define BENCHMARK_OS_FREEBSD 1
-#elif defined(__NetBSD__)
-  #define BENCHMARK_OS_NETBSD 1
-#elif defined(__OpenBSD__)
-  #define BENCHMARK_OS_OPENBSD 1
-#elif defined(__DragonFly__)
-  #define BENCHMARK_OS_DRAGONFLY 1
-#elif defined(__linux__)
-  #define BENCHMARK_OS_LINUX 1
-#elif defined(__native_client__)
-  #define BENCHMARK_OS_NACL 1
-#elif defined(__EMSCRIPTEN__)
-  #define BENCHMARK_OS_EMSCRIPTEN 1
-#elif defined(__rtems__)
-  #define BENCHMARK_OS_RTEMS 1
-#elif defined(__Fuchsia__)
-#define BENCHMARK_OS_FUCHSIA 1
-#elif defined (__SVR4) && defined (__sun)
-#define BENCHMARK_OS_SOLARIS 1
-#elif defined(__QNX__)
-#define BENCHMARK_OS_QNX 1
-#elif defined(__MVS__)
-#define BENCHMARK_OS_ZOS 1
-#endif
-
-#if defined(__ANDROID__) && defined(__GLIBCXX__)
-#define BENCHMARK_STL_ANDROID_GNUSTL 1
-#endif
-
-#if !__has_feature(cxx_exceptions) && !defined(__cpp_exceptions) \
-     && !defined(__EXCEPTIONS)
-  #define BENCHMARK_HAS_NO_EXCEPTIONS
-#endif
-
-#if defined(COMPILER_CLANG) || defined(COMPILER_GCC)
-  #define BENCHMARK_MAYBE_UNUSED __attribute__((unused))
-#else
-  #define BENCHMARK_MAYBE_UNUSED
-#endif
-
-// clang-format on
-
-#endif  // BENCHMARK_INTERNAL_MACROS_H_
diff --git a/3rdparty/benchmark/src/json_reporter.cc b/3rdparty/benchmark/src/json_reporter.cc
deleted file mode 100644
index e84a4ed2..00000000
--- a/3rdparty/benchmark/src/json_reporter.cc
+++ /dev/null
@@ -1,323 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <algorithm>
-#include <cmath>
-#include <cstdint>
-#include <iomanip>  // for setprecision
-#include <iostream>
-#include <limits>
-#include <string>
-#include <tuple>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "complexity.h"
-#include "string_util.h"
-#include "timers.h"
-
-namespace benchmark {
-namespace internal {
-extern std::map<std::string, std::string>* global_context;
-}
-
-namespace {
-
-std::string StrEscape(const std::string& s) {
-  std::string tmp;
-  tmp.reserve(s.size());
-  for (char c : s) {
-    switch (c) {
-      case '\b':
-        tmp += "\\b";
-        break;
-      case '\f':
-        tmp += "\\f";
-        break;
-      case '\n':
-        tmp += "\\n";
-        break;
-      case '\r':
-        tmp += "\\r";
-        break;
-      case '\t':
-        tmp += "\\t";
-        break;
-      case '\\':
-        tmp += "\\\\";
-        break;
-      case '"':
-        tmp += "\\\"";
-        break;
-      default:
-        tmp += c;
-        break;
-    }
-  }
-  return tmp;
-}
-
-std::string FormatKV(std::string const& key, std::string const& value) {
-  return StrFormat("\"%s\": \"%s\"", StrEscape(key).c_str(),
-                   StrEscape(value).c_str());
-}
-
-std::string FormatKV(std::string const& key, const char* value) {
-  return StrFormat("\"%s\": \"%s\"", StrEscape(key).c_str(),
-                   StrEscape(value).c_str());
-}
-
-std::string FormatKV(std::string const& key, bool value) {
-  return StrFormat("\"%s\": %s", StrEscape(key).c_str(),
-                   value ? "true" : "false");
-}
-
-std::string FormatKV(std::string const& key, int64_t value) {
-  std::stringstream ss;
-  ss << '"' << StrEscape(key) << "\": " << value;
-  return ss.str();
-}
-
-std::string FormatKV(std::string const& key, IterationCount value) {
-  std::stringstream ss;
-  ss << '"' << StrEscape(key) << "\": " << value;
-  return ss.str();
-}
-
-std::string FormatKV(std::string const& key, double value) {
-  std::stringstream ss;
-  ss << '"' << StrEscape(key) << "\": ";
-
-  if (std::isnan(value))
-    ss << (value < 0 ? "-" : "") << "NaN";
-  else if (std::isinf(value))
-    ss << (value < 0 ? "-" : "") << "Infinity";
-  else {
-    const auto max_digits10 =
-        std::numeric_limits<decltype(value)>::max_digits10;
-    const auto max_fractional_digits10 = max_digits10 - 1;
-    ss << std::scientific << std::setprecision(max_fractional_digits10)
-       << value;
-  }
-  return ss.str();
-}
-
-int64_t RoundDouble(double v) { return std::lround(v); }
-
-}  // end namespace
-
-bool JSONReporter::ReportContext(const Context& context) {
-  std::ostream& out = GetOutputStream();
-
-  out << "{\n";
-  std::string inner_indent(2, ' ');
-
-  // Open context block and print context information.
-  out << inner_indent << "\"context\": {\n";
-  std::string indent(4, ' ');
-
-  std::string walltime_value = LocalDateTimeString();
-  out << indent << FormatKV("date", walltime_value) << ",\n";
-
-  out << indent << FormatKV("host_name", context.sys_info.name) << ",\n";
-
-  if (Context::executable_name) {
-    out << indent << FormatKV("executable", Context::executable_name) << ",\n";
-  }
-
-  CPUInfo const& info = context.cpu_info;
-  out << indent << FormatKV("num_cpus", static_cast<int64_t>(info.num_cpus))
-      << ",\n";
-  out << indent
-      << FormatKV("mhz_per_cpu",
-                  RoundDouble(info.cycles_per_second / 1000000.0))
-      << ",\n";
-  if (CPUInfo::Scaling::UNKNOWN != info.scaling) {
-    out << indent
-        << FormatKV("cpu_scaling_enabled",
-                    info.scaling == CPUInfo::Scaling::ENABLED ? true : false)
-        << ",\n";
-  }
-
-  out << indent << "\"caches\": [\n";
-  indent = std::string(6, ' ');
-  std::string cache_indent(8, ' ');
-  for (size_t i = 0; i < info.caches.size(); ++i) {
-    auto& CI = info.caches[i];
-    out << indent << "{\n";
-    out << cache_indent << FormatKV("type", CI.type) << ",\n";
-    out << cache_indent << FormatKV("level", static_cast<int64_t>(CI.level))
-        << ",\n";
-    out << cache_indent << FormatKV("size", static_cast<int64_t>(CI.size))
-        << ",\n";
-    out << cache_indent
-        << FormatKV("num_sharing", static_cast<int64_t>(CI.num_sharing))
-        << "\n";
-    out << indent << "}";
-    if (i != info.caches.size() - 1) out << ",";
-    out << "\n";
-  }
-  indent = std::string(4, ' ');
-  out << indent << "],\n";
-  out << indent << "\"load_avg\": [";
-  for (auto it = info.load_avg.begin(); it != info.load_avg.end();) {
-    out << *it++;
-    if (it != info.load_avg.end()) out << ",";
-  }
-  out << "],\n";
-
-#if defined(NDEBUG)
-  const char build_type[] = "release";
-#else
-  const char build_type[] = "debug";
-#endif
-  out << indent << FormatKV("library_build_type", build_type);
-
-  if (internal::global_context != nullptr) {
-    for (const auto& kv : *internal::global_context) {
-      out << ",\n";
-      out << indent << FormatKV(kv.first, kv.second);
-    }
-  }
-  out << "\n";
-
-  // Close context block and open the list of benchmarks.
-  out << inner_indent << "},\n";
-  out << inner_indent << "\"benchmarks\": [\n";
-  return true;
-}
-
-void JSONReporter::ReportRuns(std::vector<Run> const& reports) {
-  if (reports.empty()) {
-    return;
-  }
-  std::string indent(4, ' ');
-  std::ostream& out = GetOutputStream();
-  if (!first_report_) {
-    out << ",\n";
-  }
-  first_report_ = false;
-
-  for (auto it = reports.begin(); it != reports.end(); ++it) {
-    out << indent << "{\n";
-    PrintRunData(*it);
-    out << indent << '}';
-    auto it_cp = it;
-    if (++it_cp != reports.end()) {
-      out << ",\n";
-    }
-  }
-}
-
-void JSONReporter::Finalize() {
-  // Close the list of benchmarks and the top level object.
-  GetOutputStream() << "\n  ]\n}\n";
-}
-
-void JSONReporter::PrintRunData(Run const& run) {
-  std::string indent(6, ' ');
-  std::ostream& out = GetOutputStream();
-  out << indent << FormatKV("name", run.benchmark_name()) << ",\n";
-  out << indent << FormatKV("family_index", run.family_index) << ",\n";
-  out << indent
-      << FormatKV("per_family_instance_index", run.per_family_instance_index)
-      << ",\n";
-  out << indent << FormatKV("run_name", run.run_name.str()) << ",\n";
-  out << indent << FormatKV("run_type", [&run]() -> const char* {
-    switch (run.run_type) {
-      case BenchmarkReporter::Run::RT_Iteration:
-        return "iteration";
-      case BenchmarkReporter::Run::RT_Aggregate:
-        return "aggregate";
-    }
-    BENCHMARK_UNREACHABLE();
-  }()) << ",\n";
-  out << indent << FormatKV("repetitions", run.repetitions) << ",\n";
-  if (run.run_type != BenchmarkReporter::Run::RT_Aggregate) {
-    out << indent << FormatKV("repetition_index", run.repetition_index)
-        << ",\n";
-  }
-  out << indent << FormatKV("threads", run.threads) << ",\n";
-  if (run.run_type == BenchmarkReporter::Run::RT_Aggregate) {
-    out << indent << FormatKV("aggregate_name", run.aggregate_name) << ",\n";
-    out << indent << FormatKV("aggregate_unit", [&run]() -> const char* {
-      switch (run.aggregate_unit) {
-        case StatisticUnit::kTime:
-          return "time";
-        case StatisticUnit::kPercentage:
-          return "percentage";
-      }
-      BENCHMARK_UNREACHABLE();
-    }()) << ",\n";
-  }
-  if (run.error_occurred) {
-    out << indent << FormatKV("error_occurred", run.error_occurred) << ",\n";
-    out << indent << FormatKV("error_message", run.error_message) << ",\n";
-  }
-  if (!run.report_big_o && !run.report_rms) {
-    out << indent << FormatKV("iterations", run.iterations) << ",\n";
-    if (run.run_type != Run::RT_Aggregate ||
-        run.aggregate_unit == StatisticUnit::kTime) {
-      out << indent << FormatKV("real_time", run.GetAdjustedRealTime())
-          << ",\n";
-      out << indent << FormatKV("cpu_time", run.GetAdjustedCPUTime());
-    } else {
-      assert(run.aggregate_unit == StatisticUnit::kPercentage);
-      out << indent << FormatKV("real_time", run.real_accumulated_time)
-          << ",\n";
-      out << indent << FormatKV("cpu_time", run.cpu_accumulated_time);
-    }
-    out << ",\n"
-        << indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
-  } else if (run.report_big_o) {
-    out << indent << FormatKV("cpu_coefficient", run.GetAdjustedCPUTime())
-        << ",\n";
-    out << indent << FormatKV("real_coefficient", run.GetAdjustedRealTime())
-        << ",\n";
-    out << indent << FormatKV("big_o", GetBigOString(run.complexity)) << ",\n";
-    out << indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
-  } else if (run.report_rms) {
-    out << indent << FormatKV("rms", run.GetAdjustedCPUTime());
-  }
-
-  for (auto& c : run.counters) {
-    out << ",\n" << indent << FormatKV(c.first, c.second);
-  }
-
-  if (run.memory_result) {
-    const MemoryManager::Result memory_result = *run.memory_result;
-    out << ",\n" << indent << FormatKV("allocs_per_iter", run.allocs_per_iter);
-    out << ",\n"
-        << indent << FormatKV("max_bytes_used", memory_result.max_bytes_used);
-
-    auto report_if_present = [&out, &indent](const char* label, int64_t val) {
-      if (val != MemoryManager::TombstoneValue)
-        out << ",\n" << indent << FormatKV(label, val);
-    };
-
-    report_if_present("total_allocated_bytes",
-                      memory_result.total_allocated_bytes);
-    report_if_present("net_heap_growth", memory_result.net_heap_growth);
-  }
-
-  if (!run.report_label.empty()) {
-    out << ",\n" << indent << FormatKV("label", run.report_label);
-  }
-  out << '\n';
-}
-
-const int64_t MemoryManager::TombstoneValue =
-    std::numeric_limits<int64_t>::max();
-
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/log.h b/3rdparty/benchmark/src/log.h
deleted file mode 100644
index 48c071ad..00000000
--- a/3rdparty/benchmark/src/log.h
+++ /dev/null
@@ -1,74 +0,0 @@
-#ifndef BENCHMARK_LOG_H_
-#define BENCHMARK_LOG_H_
-
-#include <iostream>
-#include <ostream>
-
-#include "benchmark/benchmark.h"
-
-namespace benchmark {
-namespace internal {
-
-typedef std::basic_ostream<char>&(EndLType)(std::basic_ostream<char>&);
-
-class LogType {
-  friend LogType& GetNullLogInstance();
-  friend LogType& GetErrorLogInstance();
-
-  // FIXME: Add locking to output.
-  template <class Tp>
-  friend LogType& operator<<(LogType&, Tp const&);
-  friend LogType& operator<<(LogType&, EndLType*);
-
- private:
-  LogType(std::ostream* out) : out_(out) {}
-  std::ostream* out_;
-  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(LogType);
-};
-
-template <class Tp>
-LogType& operator<<(LogType& log, Tp const& value) {
-  if (log.out_) {
-    *log.out_ << value;
-  }
-  return log;
-}
-
-inline LogType& operator<<(LogType& log, EndLType* m) {
-  if (log.out_) {
-    *log.out_ << m;
-  }
-  return log;
-}
-
-inline int& LogLevel() {
-  static int log_level = 0;
-  return log_level;
-}
-
-inline LogType& GetNullLogInstance() {
-  static LogType log(nullptr);
-  return log;
-}
-
-inline LogType& GetErrorLogInstance() {
-  static LogType log(&std::clog);
-  return log;
-}
-
-inline LogType& GetLogInstanceForLevel(int level) {
-  if (level <= LogLevel()) {
-    return GetErrorLogInstance();
-  }
-  return GetNullLogInstance();
-}
-
-}  // end namespace internal
-}  // end namespace benchmark
-
-// clang-format off
-#define BM_VLOG(x)                                                               \
-  (::benchmark::internal::GetLogInstanceForLevel(x) << "-- LOG(" << x << "):" \
-                                                                         " ")
-// clang-format on
-#endif
diff --git a/3rdparty/benchmark/src/mutex.h b/3rdparty/benchmark/src/mutex.h
deleted file mode 100644
index bec78d9e..00000000
--- a/3rdparty/benchmark/src/mutex.h
+++ /dev/null
@@ -1,155 +0,0 @@
-#ifndef BENCHMARK_MUTEX_H_
-#define BENCHMARK_MUTEX_H_
-
-#include <condition_variable>
-#include <mutex>
-
-#include "check.h"
-
-// Enable thread safety attributes only with clang.
-// The attributes can be safely erased when compiling with other compilers.
-#if defined(HAVE_THREAD_SAFETY_ATTRIBUTES)
-#define THREAD_ANNOTATION_ATTRIBUTE_(x) __attribute__((x))
-#else
-#define THREAD_ANNOTATION_ATTRIBUTE_(x)  // no-op
-#endif
-
-#define CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE_(capability(x))
-
-#define SCOPED_CAPABILITY THREAD_ANNOTATION_ATTRIBUTE_(scoped_lockable)
-
-#define GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE_(guarded_by(x))
-
-#define PT_GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE_(pt_guarded_by(x))
-
-#define ACQUIRED_BEFORE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE_(acquired_before(__VA_ARGS__))
-
-#define ACQUIRED_AFTER(...) \
-  THREAD_ANNOTATION_ATTRIBUTE_(acquired_after(__VA_ARGS__))
-
-#define REQUIRES(...) \
-  THREAD_ANNOTATION_ATTRIBUTE_(requires_capability(__VA_ARGS__))
-
-#define REQUIRES_SHARED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE_(requires_shared_capability(__VA_ARGS__))
-
-#define ACQUIRE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE_(acquire_capability(__VA_ARGS__))
-
-#define ACQUIRE_SHARED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE_(acquire_shared_capability(__VA_ARGS__))
-
-#define RELEASE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE_(release_capability(__VA_ARGS__))
-
-#define RELEASE_SHARED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE_(release_shared_capability(__VA_ARGS__))
-
-#define TRY_ACQUIRE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE_(try_acquire_capability(__VA_ARGS__))
-
-#define TRY_ACQUIRE_SHARED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE_(try_acquire_shared_capability(__VA_ARGS__))
-
-#define EXCLUDES(...) THREAD_ANNOTATION_ATTRIBUTE_(locks_excluded(__VA_ARGS__))
-
-#define ASSERT_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE_(assert_capability(x))
-
-#define ASSERT_SHARED_CAPABILITY(x) \
-  THREAD_ANNOTATION_ATTRIBUTE_(assert_shared_capability(x))
-
-#define RETURN_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE_(lock_returned(x))
-
-#define NO_THREAD_SAFETY_ANALYSIS \
-  THREAD_ANNOTATION_ATTRIBUTE_(no_thread_safety_analysis)
-
-namespace benchmark {
-
-typedef std::condition_variable Condition;
-
-// NOTE: Wrappers for std::mutex and std::unique_lock are provided so that
-// we can annotate them with thread safety attributes and use the
-// -Wthread-safety warning with clang. The standard library types cannot be
-// used directly because they do not provide the required annotations.
-class CAPABILITY("mutex") Mutex {
- public:
-  Mutex() {}
-
-  void lock() ACQUIRE() { mut_.lock(); }
-  void unlock() RELEASE() { mut_.unlock(); }
-  std::mutex& native_handle() { return mut_; }
-
- private:
-  std::mutex mut_;
-};
-
-class SCOPED_CAPABILITY MutexLock {
-  typedef std::unique_lock<std::mutex> MutexLockImp;
-
- public:
-  MutexLock(Mutex& m) ACQUIRE(m) : ml_(m.native_handle()) {}
-  ~MutexLock() RELEASE() {}
-  MutexLockImp& native_handle() { return ml_; }
-
- private:
-  MutexLockImp ml_;
-};
-
-class Barrier {
- public:
-  Barrier(int num_threads) : running_threads_(num_threads) {}
-
-  // Called by each thread
-  bool wait() EXCLUDES(lock_) {
-    bool last_thread = false;
-    {
-      MutexLock ml(lock_);
-      last_thread = createBarrier(ml);
-    }
-    if (last_thread) phase_condition_.notify_all();
-    return last_thread;
-  }
-
-  void removeThread() EXCLUDES(lock_) {
-    MutexLock ml(lock_);
-    --running_threads_;
-    if (entered_ != 0) phase_condition_.notify_all();
-  }
-
- private:
-  Mutex lock_;
-  Condition phase_condition_;
-  int running_threads_;
-
-  // State for barrier management
-  int phase_number_ = 0;
-  int entered_ = 0;  // Number of threads that have entered this barrier
-
-  // Enter the barrier and wait until all other threads have also
-  // entered the barrier.  Returns iff this is the last thread to
-  // enter the barrier.
-  bool createBarrier(MutexLock& ml) REQUIRES(lock_) {
-    BM_CHECK_LT(entered_, running_threads_);
-    entered_++;
-    if (entered_ < running_threads_) {
-      // Wait for all threads to enter
-      int phase_number_cp = phase_number_;
-      auto cb = [this, phase_number_cp]() {
-        return this->phase_number_ > phase_number_cp ||
-               entered_ == running_threads_;  // A thread has aborted in error
-      };
-      phase_condition_.wait(ml.native_handle(), cb);
-      if (phase_number_ > phase_number_cp) return false;
-      // else (running_threads_ == entered_) and we are the last thread.
-    }
-    // Last thread has reached the barrier
-    phase_number_++;
-    entered_ = 0;
-    return true;
-  }
-};
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_MUTEX_H_
diff --git a/3rdparty/benchmark/src/perf_counters.cc b/3rdparty/benchmark/src/perf_counters.cc
deleted file mode 100644
index b2ac7687..00000000
--- a/3rdparty/benchmark/src/perf_counters.cc
+++ /dev/null
@@ -1,132 +0,0 @@
-// Copyright 2021 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "perf_counters.h"
-
-#include <cstring>
-#include <vector>
-
-#if defined HAVE_LIBPFM
-#include "perfmon/pfmlib.h"
-#include "perfmon/pfmlib_perf_event.h"
-#endif
-
-namespace benchmark {
-namespace internal {
-
-constexpr size_t PerfCounterValues::kMaxCounters;
-
-#if defined HAVE_LIBPFM
-const bool PerfCounters::kSupported = true;
-
-bool PerfCounters::Initialize() { return pfm_initialize() == PFM_SUCCESS; }
-
-PerfCounters PerfCounters::Create(
-    const std::vector<std::string>& counter_names) {
-  if (counter_names.empty()) {
-    return NoCounters();
-  }
-  if (counter_names.size() > PerfCounterValues::kMaxCounters) {
-    GetErrorLogInstance()
-        << counter_names.size()
-        << " counters were requested. The minimum is 1, the maximum is "
-        << PerfCounterValues::kMaxCounters << "\n";
-    return NoCounters();
-  }
-  std::vector<int> counter_ids(counter_names.size());
-
-  const int mode = PFM_PLM3;  // user mode only
-  for (size_t i = 0; i < counter_names.size(); ++i) {
-    const bool is_first = i == 0;
-    struct perf_event_attr attr {};
-    attr.size = sizeof(attr);
-    const int group_id = !is_first ? counter_ids[0] : -1;
-    const auto& name = counter_names[i];
-    if (name.empty()) {
-      GetErrorLogInstance() << "A counter name was the empty string\n";
-      return NoCounters();
-    }
-    pfm_perf_encode_arg_t arg{};
-    arg.attr = &attr;
-
-    const int pfm_get =
-        pfm_get_os_event_encoding(name.c_str(), mode, PFM_OS_PERF_EVENT, &arg);
-    if (pfm_get != PFM_SUCCESS) {
-      GetErrorLogInstance() << "Unknown counter name: " << name << "\n";
-      return NoCounters();
-    }
-    attr.disabled = is_first;
-    // Note: the man page for perf_event_create suggests inerit = true and
-    // read_format = PERF_FORMAT_GROUP don't work together, but that's not the
-    // case.
-    attr.inherit = true;
-    attr.pinned = is_first;
-    attr.exclude_kernel = true;
-    attr.exclude_user = false;
-    attr.exclude_hv = true;
-    // Read all counters in one read.
-    attr.read_format = PERF_FORMAT_GROUP;
-
-    int id = -1;
-    static constexpr size_t kNrOfSyscallRetries = 5;
-    // Retry syscall as it was interrupted often (b/64774091).
-    for (size_t num_retries = 0; num_retries < kNrOfSyscallRetries;
-         ++num_retries) {
-      id = perf_event_open(&attr, 0, -1, group_id, 0);
-      if (id >= 0 || errno != EINTR) {
-        break;
-      }
-    }
-    if (id < 0) {
-      GetErrorLogInstance()
-          << "Failed to get a file descriptor for " << name << "\n";
-      return NoCounters();
-    }
-
-    counter_ids[i] = id;
-  }
-  if (ioctl(counter_ids[0], PERF_EVENT_IOC_ENABLE) != 0) {
-    GetErrorLogInstance() << "Failed to start counters\n";
-    return NoCounters();
-  }
-
-  return PerfCounters(counter_names, std::move(counter_ids));
-}
-
-PerfCounters::~PerfCounters() {
-  if (counter_ids_.empty()) {
-    return;
-  }
-  ioctl(counter_ids_[0], PERF_EVENT_IOC_DISABLE);
-  for (int fd : counter_ids_) {
-    close(fd);
-  }
-}
-#else   // defined HAVE_LIBPFM
-const bool PerfCounters::kSupported = false;
-
-bool PerfCounters::Initialize() { return false; }
-
-PerfCounters PerfCounters::Create(
-    const std::vector<std::string>& counter_names) {
-  if (!counter_names.empty()) {
-    GetErrorLogInstance() << "Performance counters not supported.";
-  }
-  return NoCounters();
-}
-
-PerfCounters::~PerfCounters() = default;
-#endif  // defined HAVE_LIBPFM
-}  // namespace internal
-}  // namespace benchmark
diff --git a/3rdparty/benchmark/src/perf_counters.h b/3rdparty/benchmark/src/perf_counters.h
deleted file mode 100644
index 47ca1385..00000000
--- a/3rdparty/benchmark/src/perf_counters.h
+++ /dev/null
@@ -1,172 +0,0 @@
-// Copyright 2021 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef BENCHMARK_PERF_COUNTERS_H
-#define BENCHMARK_PERF_COUNTERS_H
-
-#include <array>
-#include <cstdint>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "check.h"
-#include "log.h"
-
-#ifndef BENCHMARK_OS_WINDOWS
-#include <unistd.h>
-#endif
-
-namespace benchmark {
-namespace internal {
-
-// Typically, we can only read a small number of counters. There is also a
-// padding preceding counter values, when reading multiple counters with one
-// syscall (which is desirable). PerfCounterValues abstracts these details.
-// The implementation ensures the storage is inlined, and allows 0-based
-// indexing into the counter values.
-// The object is used in conjunction with a PerfCounters object, by passing it
-// to Snapshot(). The values are populated such that
-// perfCounters->names()[i]'s value is obtained at position i (as given by
-// operator[]) of this object.
-class PerfCounterValues {
- public:
-  explicit PerfCounterValues(size_t nr_counters) : nr_counters_(nr_counters) {
-    BM_CHECK_LE(nr_counters_, kMaxCounters);
-  }
-
-  uint64_t operator[](size_t pos) const { return values_[kPadding + pos]; }
-
-  static constexpr size_t kMaxCounters = 3;
-
- private:
-  friend class PerfCounters;
-  // Get the byte buffer in which perf counters can be captured.
-  // This is used by PerfCounters::Read
-  std::pair<char*, size_t> get_data_buffer() {
-    return {reinterpret_cast<char*>(values_.data()),
-            sizeof(uint64_t) * (kPadding + nr_counters_)};
-  }
-
-  static constexpr size_t kPadding = 1;
-  std::array<uint64_t, kPadding + kMaxCounters> values_;
-  const size_t nr_counters_;
-};
-
-// Collect PMU counters. The object, once constructed, is ready to be used by
-// calling read(). PMU counter collection is enabled from the time create() is
-// called, to obtain the object, until the object's destructor is called.
-class PerfCounters final {
- public:
-  // True iff this platform supports performance counters.
-  static const bool kSupported;
-
-  bool IsValid() const { return is_valid_; }
-  static PerfCounters NoCounters() { return PerfCounters(); }
-
-  ~PerfCounters();
-  PerfCounters(PerfCounters&&) = default;
-  PerfCounters(const PerfCounters&) = delete;
-
-  // Platform-specific implementations may choose to do some library
-  // initialization here.
-  static bool Initialize();
-
-  // Return a PerfCounters object ready to read the counters with the names
-  // specified. The values are user-mode only. The counter name format is
-  // implementation and OS specific.
-  // TODO: once we move to C++-17, this should be a std::optional, and then the
-  // IsValid() boolean can be dropped.
-  static PerfCounters Create(const std::vector<std::string>& counter_names);
-
-  // Take a snapshot of the current value of the counters into the provided
-  // valid PerfCounterValues storage. The values are populated such that:
-  // names()[i]'s value is (*values)[i]
-  BENCHMARK_ALWAYS_INLINE bool Snapshot(PerfCounterValues* values) const {
-#ifndef BENCHMARK_OS_WINDOWS
-    assert(values != nullptr);
-    assert(IsValid());
-    auto buffer = values->get_data_buffer();
-    auto read_bytes = ::read(counter_ids_[0], buffer.first, buffer.second);
-    return static_cast<size_t>(read_bytes) == buffer.second;
-#else
-    (void)values;
-    return false;
-#endif
-  }
-
-  const std::vector<std::string>& names() const { return counter_names_; }
-  size_t num_counters() const { return counter_names_.size(); }
-
- private:
-  PerfCounters(const std::vector<std::string>& counter_names,
-               std::vector<int>&& counter_ids)
-      : counter_ids_(std::move(counter_ids)),
-        counter_names_(counter_names),
-        is_valid_(true) {}
-  PerfCounters() : is_valid_(false) {}
-
-  std::vector<int> counter_ids_;
-  const std::vector<std::string> counter_names_;
-  const bool is_valid_;
-};
-
-// Typical usage of the above primitives.
-class PerfCountersMeasurement final {
- public:
-  PerfCountersMeasurement(PerfCounters&& c)
-      : counters_(std::move(c)),
-        start_values_(counters_.IsValid() ? counters_.names().size() : 0),
-        end_values_(counters_.IsValid() ? counters_.names().size() : 0) {}
-
-  bool IsValid() const { return counters_.IsValid(); }
-
-  BENCHMARK_ALWAYS_INLINE void Start() {
-    assert(IsValid());
-    // Tell the compiler to not move instructions above/below where we take
-    // the snapshot.
-    ClobberMemory();
-    counters_.Snapshot(&start_values_);
-    ClobberMemory();
-  }
-
-  BENCHMARK_ALWAYS_INLINE std::vector<std::pair<std::string, double>>
-  StopAndGetMeasurements() {
-    assert(IsValid());
-    // Tell the compiler to not move instructions above/below where we take
-    // the snapshot.
-    ClobberMemory();
-    counters_.Snapshot(&end_values_);
-    ClobberMemory();
-
-    std::vector<std::pair<std::string, double>> ret;
-    for (size_t i = 0; i < counters_.names().size(); ++i) {
-      double measurement = static_cast<double>(end_values_[i]) -
-                           static_cast<double>(start_values_[i]);
-      ret.push_back({counters_.names()[i], measurement});
-    }
-    return ret;
-  }
-
- private:
-  PerfCounters counters_;
-  PerfCounterValues start_values_;
-  PerfCounterValues end_values_;
-};
-
-BENCHMARK_UNUSED static bool perf_init_anchor = PerfCounters::Initialize();
-
-}  // namespace internal
-}  // namespace benchmark
-
-#endif  // BENCHMARK_PERF_COUNTERS_H
diff --git a/3rdparty/benchmark/src/re.h b/3rdparty/benchmark/src/re.h
deleted file mode 100644
index 63004678..00000000
--- a/3rdparty/benchmark/src/re.h
+++ /dev/null
@@ -1,158 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef BENCHMARK_RE_H_
-#define BENCHMARK_RE_H_
-
-#include "internal_macros.h"
-
-// clang-format off
-
-#if !defined(HAVE_STD_REGEX) && \
-    !defined(HAVE_GNU_POSIX_REGEX) && \
-    !defined(HAVE_POSIX_REGEX)
-  // No explicit regex selection; detect based on builtin hints.
-  #if defined(BENCHMARK_OS_LINUX) || defined(BENCHMARK_OS_APPLE)
-    #define HAVE_POSIX_REGEX 1
-  #elif __cplusplus >= 199711L
-    #define HAVE_STD_REGEX 1
-  #endif
-#endif
-
-// Prefer C regex libraries when compiling w/o exceptions so that we can
-// correctly report errors.
-#if defined(BENCHMARK_HAS_NO_EXCEPTIONS) && \
-    defined(BENCHMARK_HAVE_STD_REGEX) && \
-    (defined(HAVE_GNU_POSIX_REGEX) || defined(HAVE_POSIX_REGEX))
-  #undef HAVE_STD_REGEX
-#endif
-
-#if defined(HAVE_STD_REGEX)
-  #include <regex>
-#elif defined(HAVE_GNU_POSIX_REGEX)
-  #include <gnuregex.h>
-#elif defined(HAVE_POSIX_REGEX)
-  #include <regex.h>
-#else
-#error No regular expression backend was found!
-#endif
-
-// clang-format on
-
-#include <string>
-
-#include "check.h"
-
-namespace benchmark {
-
-// A wrapper around the POSIX regular expression API that provides automatic
-// cleanup
-class Regex {
- public:
-  Regex() : init_(false) {}
-
-  ~Regex();
-
-  // Compile a regular expression matcher from spec.  Returns true on success.
-  //
-  // On failure (and if error is not nullptr), error is populated with a human
-  // readable error message if an error occurs.
-  bool Init(const std::string& spec, std::string* error);
-
-  // Returns whether str matches the compiled regular expression.
-  bool Match(const std::string& str);
-
- private:
-  bool init_;
-// Underlying regular expression object
-#if defined(HAVE_STD_REGEX)
-  std::regex re_;
-#elif defined(HAVE_POSIX_REGEX) || defined(HAVE_GNU_POSIX_REGEX)
-  regex_t re_;
-#else
-#error No regular expression backend implementation available
-#endif
-};
-
-#if defined(HAVE_STD_REGEX)
-
-inline bool Regex::Init(const std::string& spec, std::string* error) {
-#ifdef BENCHMARK_HAS_NO_EXCEPTIONS
-  ((void)error);  // suppress unused warning
-#else
-  try {
-#endif
-  re_ = std::regex(spec, std::regex_constants::extended);
-  init_ = true;
-#ifndef BENCHMARK_HAS_NO_EXCEPTIONS
-}
-catch (const std::regex_error& e) {
-  if (error) {
-    *error = e.what();
-  }
-}
-#endif
-return init_;
-}
-
-inline Regex::~Regex() {}
-
-inline bool Regex::Match(const std::string& str) {
-  if (!init_) {
-    return false;
-  }
-  return std::regex_search(str, re_);
-}
-
-#else
-inline bool Regex::Init(const std::string& spec, std::string* error) {
-  int ec = regcomp(&re_, spec.c_str(), REG_EXTENDED | REG_NOSUB);
-  if (ec != 0) {
-    if (error) {
-      size_t needed = regerror(ec, &re_, nullptr, 0);
-      char* errbuf = new char[needed];
-      regerror(ec, &re_, errbuf, needed);
-
-      // regerror returns the number of bytes necessary to null terminate
-      // the string, so we move that when assigning to error.
-      BM_CHECK_NE(needed, 0);
-      error->assign(errbuf, needed - 1);
-
-      delete[] errbuf;
-    }
-
-    return false;
-  }
-
-  init_ = true;
-  return true;
-}
-
-inline Regex::~Regex() {
-  if (init_) {
-    regfree(&re_);
-  }
-}
-
-inline bool Regex::Match(const std::string& str) {
-  if (!init_) {
-    return false;
-  }
-  return regexec(&re_, str.c_str(), 0, nullptr, 0) == 0;
-}
-#endif
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_RE_H_
diff --git a/3rdparty/benchmark/src/reporter.cc b/3rdparty/benchmark/src/reporter.cc
deleted file mode 100644
index 1d2df17b..00000000
--- a/3rdparty/benchmark/src/reporter.cc
+++ /dev/null
@@ -1,114 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <cstdlib>
-#include <iostream>
-#include <map>
-#include <string>
-#include <tuple>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "check.h"
-#include "string_util.h"
-#include "timers.h"
-
-namespace benchmark {
-namespace internal {
-extern std::map<std::string, std::string> *global_context;
-}
-
-BenchmarkReporter::BenchmarkReporter()
-    : output_stream_(&std::cout), error_stream_(&std::cerr) {}
-
-BenchmarkReporter::~BenchmarkReporter() {}
-
-void BenchmarkReporter::PrintBasicContext(std::ostream *out,
-                                          Context const &context) {
-  BM_CHECK(out) << "cannot be null";
-  auto &Out = *out;
-
-  Out << LocalDateTimeString() << "\n";
-
-  if (context.executable_name)
-    Out << "Running " << context.executable_name << "\n";
-
-  const CPUInfo &info = context.cpu_info;
-  Out << "Run on (" << info.num_cpus << " X "
-      << (info.cycles_per_second / 1000000.0) << " MHz CPU "
-      << ((info.num_cpus > 1) ? "s" : "") << ")\n";
-  if (info.caches.size() != 0) {
-    Out << "CPU Caches:\n";
-    for (auto &CInfo : info.caches) {
-      Out << "  L" << CInfo.level << " " << CInfo.type << " "
-          << (CInfo.size / 1024) << " KiB";
-      if (CInfo.num_sharing != 0)
-        Out << " (x" << (info.num_cpus / CInfo.num_sharing) << ")";
-      Out << "\n";
-    }
-  }
-  if (!info.load_avg.empty()) {
-    Out << "Load Average: ";
-    for (auto It = info.load_avg.begin(); It != info.load_avg.end();) {
-      Out << StrFormat("%.2f", *It++);
-      if (It != info.load_avg.end()) Out << ", ";
-    }
-    Out << "\n";
-  }
-
-  if (internal::global_context != nullptr) {
-    for (const auto &kv : *internal::global_context) {
-      Out << kv.first << ": " << kv.second << "\n";
-    }
-  }
-
-  if (CPUInfo::Scaling::ENABLED == info.scaling) {
-    Out << "***WARNING*** CPU scaling is enabled, the benchmark "
-           "real time measurements may be noisy and will incur extra "
-           "overhead.\n";
-  }
-
-#ifndef NDEBUG
-  Out << "***WARNING*** Library was built as DEBUG. Timings may be "
-         "affected.\n";
-#endif
-}
-
-// No initializer because it's already initialized to NULL.
-const char *BenchmarkReporter::Context::executable_name;
-
-BenchmarkReporter::Context::Context()
-    : cpu_info(CPUInfo::Get()), sys_info(SystemInfo::Get()) {}
-
-std::string BenchmarkReporter::Run::benchmark_name() const {
-  std::string name = run_name.str();
-  if (run_type == RT_Aggregate) {
-    name += "_" + aggregate_name;
-  }
-  return name;
-}
-
-double BenchmarkReporter::Run::GetAdjustedRealTime() const {
-  double new_time = real_accumulated_time * GetTimeUnitMultiplier(time_unit);
-  if (iterations != 0) new_time /= static_cast<double>(iterations);
-  return new_time;
-}
-
-double BenchmarkReporter::Run::GetAdjustedCPUTime() const {
-  double new_time = cpu_accumulated_time * GetTimeUnitMultiplier(time_unit);
-  if (iterations != 0) new_time /= static_cast<double>(iterations);
-  return new_time;
-}
-
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/sleep.cc b/3rdparty/benchmark/src/sleep.cc
deleted file mode 100644
index ab59000f..00000000
--- a/3rdparty/benchmark/src/sleep.cc
+++ /dev/null
@@ -1,66 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "sleep.h"
-
-#include <cerrno>
-#include <cstdlib>
-#include <ctime>
-
-#include "internal_macros.h"
-
-#ifdef BENCHMARK_OS_WINDOWS
-#include <windows.h>
-#endif
-
-#ifdef BENCHMARK_OS_ZOS
-#include <unistd.h>
-#endif
-
-namespace benchmark {
-#ifdef BENCHMARK_OS_WINDOWS
-// Window's Sleep takes milliseconds argument.
-void SleepForMilliseconds(int milliseconds) { Sleep(milliseconds); }
-void SleepForSeconds(double seconds) {
-  SleepForMilliseconds(static_cast<int>(kNumMillisPerSecond * seconds));
-}
-#else  // BENCHMARK_OS_WINDOWS
-void SleepForMicroseconds(int microseconds) {
-#ifdef BENCHMARK_OS_ZOS
-  // z/OS does not support nanosleep. Instead call sleep() and then usleep() to
-  // sleep for the remaining microseconds because usleep() will fail if its
-  // argument is greater than 1000000.
-  div_t sleepTime = div(microseconds, kNumMicrosPerSecond);
-  int seconds = sleepTime.quot;
-  while (seconds != 0) seconds = sleep(seconds);
-  while (usleep(sleepTime.rem) == -1 && errno == EINTR)
-    ;
-#else
-  struct timespec sleep_time;
-  sleep_time.tv_sec = microseconds / kNumMicrosPerSecond;
-  sleep_time.tv_nsec = (microseconds % kNumMicrosPerSecond) * kNumNanosPerMicro;
-  while (nanosleep(&sleep_time, &sleep_time) != 0 && errno == EINTR)
-    ;  // Ignore signals and wait for the full interval to elapse.
-#endif
-}
-
-void SleepForMilliseconds(int milliseconds) {
-  SleepForMicroseconds(milliseconds * kNumMicrosPerMilli);
-}
-
-void SleepForSeconds(double seconds) {
-  SleepForMicroseconds(static_cast<int>(seconds * kNumMicrosPerSecond));
-}
-#endif  // BENCHMARK_OS_WINDOWS
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/sleep.h b/3rdparty/benchmark/src/sleep.h
deleted file mode 100644
index f98551af..00000000
--- a/3rdparty/benchmark/src/sleep.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef BENCHMARK_SLEEP_H_
-#define BENCHMARK_SLEEP_H_
-
-namespace benchmark {
-const int kNumMillisPerSecond = 1000;
-const int kNumMicrosPerMilli = 1000;
-const int kNumMicrosPerSecond = kNumMillisPerSecond * 1000;
-const int kNumNanosPerMicro = 1000;
-const int kNumNanosPerSecond = kNumNanosPerMicro * kNumMicrosPerSecond;
-
-void SleepForMilliseconds(int milliseconds);
-void SleepForSeconds(double seconds);
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_SLEEP_H_
diff --git a/3rdparty/benchmark/src/statistics.cc b/3rdparty/benchmark/src/statistics.cc
deleted file mode 100644
index 3e5ef099..00000000
--- a/3rdparty/benchmark/src/statistics.cc
+++ /dev/null
@@ -1,208 +0,0 @@
-// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
-// Copyright 2017 Roman Lebedev. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "statistics.h"
-
-#include <algorithm>
-#include <cmath>
-#include <numeric>
-#include <string>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "check.h"
-
-namespace benchmark {
-
-auto StatisticsSum = [](const std::vector<double>& v) {
-  return std::accumulate(v.begin(), v.end(), 0.0);
-};
-
-double StatisticsMean(const std::vector<double>& v) {
-  if (v.empty()) return 0.0;
-  return StatisticsSum(v) * (1.0 / v.size());
-}
-
-double StatisticsMedian(const std::vector<double>& v) {
-  if (v.size() < 3) return StatisticsMean(v);
-  std::vector<double> copy(v);
-
-  auto center = copy.begin() + v.size() / 2;
-  std::nth_element(copy.begin(), center, copy.end());
-
-  // did we have an odd number of samples?
-  // if yes, then center is the median
-  // it no, then we are looking for the average between center and the value
-  // before
-  if (v.size() % 2 == 1) return *center;
-  auto center2 = copy.begin() + v.size() / 2 - 1;
-  std::nth_element(copy.begin(), center2, copy.end());
-  return (*center + *center2) / 2.0;
-}
-
-// Return the sum of the squares of this sample set
-auto SumSquares = [](const std::vector<double>& v) {
-  return std::inner_product(v.begin(), v.end(), v.begin(), 0.0);
-};
-
-auto Sqr = [](const double dat) { return dat * dat; };
-auto Sqrt = [](const double dat) {
-  // Avoid NaN due to imprecision in the calculations
-  if (dat < 0.0) return 0.0;
-  return std::sqrt(dat);
-};
-
-double StatisticsStdDev(const std::vector<double>& v) {
-  const auto mean = StatisticsMean(v);
-  if (v.empty()) return mean;
-
-  // Sample standard deviation is undefined for n = 1
-  if (v.size() == 1) return 0.0;
-
-  const double avg_squares = SumSquares(v) * (1.0 / v.size());
-  return Sqrt(v.size() / (v.size() - 1.0) * (avg_squares - Sqr(mean)));
-}
-
-double StatisticsCV(const std::vector<double>& v) {
-  if (v.size() < 2) return 0.0;
-
-  const auto stddev = StatisticsStdDev(v);
-  const auto mean = StatisticsMean(v);
-
-  return stddev / mean;
-}
-
-std::vector<BenchmarkReporter::Run> ComputeStats(
-    const std::vector<BenchmarkReporter::Run>& reports) {
-  typedef BenchmarkReporter::Run Run;
-  std::vector<Run> results;
-
-  auto error_count =
-      std::count_if(reports.begin(), reports.end(),
-                    [](Run const& run) { return run.error_occurred; });
-
-  if (reports.size() - error_count < 2) {
-    // We don't report aggregated data if there was a single run.
-    return results;
-  }
-
-  // Accumulators.
-  std::vector<double> real_accumulated_time_stat;
-  std::vector<double> cpu_accumulated_time_stat;
-
-  real_accumulated_time_stat.reserve(reports.size());
-  cpu_accumulated_time_stat.reserve(reports.size());
-
-  // All repetitions should be run with the same number of iterations so we
-  // can take this information from the first benchmark.
-  const IterationCount run_iterations = reports.front().iterations;
-  // create stats for user counters
-  struct CounterStat {
-    Counter c;
-    std::vector<double> s;
-  };
-  std::map<std::string, CounterStat> counter_stats;
-  for (Run const& r : reports) {
-    for (auto const& cnt : r.counters) {
-      auto it = counter_stats.find(cnt.first);
-      if (it == counter_stats.end()) {
-        counter_stats.insert({cnt.first, {cnt.second, std::vector<double>{}}});
-        it = counter_stats.find(cnt.first);
-        it->second.s.reserve(reports.size());
-      } else {
-        BM_CHECK_EQ(counter_stats[cnt.first].c.flags, cnt.second.flags);
-      }
-    }
-  }
-
-  // Populate the accumulators.
-  for (Run const& run : reports) {
-    BM_CHECK_EQ(reports[0].benchmark_name(), run.benchmark_name());
-    BM_CHECK_EQ(run_iterations, run.iterations);
-    if (run.error_occurred) continue;
-    real_accumulated_time_stat.emplace_back(run.real_accumulated_time);
-    cpu_accumulated_time_stat.emplace_back(run.cpu_accumulated_time);
-    // user counters
-    for (auto const& cnt : run.counters) {
-      auto it = counter_stats.find(cnt.first);
-      BM_CHECK_NE(it, counter_stats.end());
-      it->second.s.emplace_back(cnt.second);
-    }
-  }
-
-  // Only add label if it is same for all runs
-  std::string report_label = reports[0].report_label;
-  for (std::size_t i = 1; i < reports.size(); i++) {
-    if (reports[i].report_label != report_label) {
-      report_label = "";
-      break;
-    }
-  }
-
-  const double iteration_rescale_factor =
-      double(reports.size()) / double(run_iterations);
-
-  for (const auto& Stat : *reports[0].statistics) {
-    // Get the data from the accumulator to BenchmarkReporter::Run's.
-    Run data;
-    data.run_name = reports[0].run_name;
-    data.family_index = reports[0].family_index;
-    data.per_family_instance_index = reports[0].per_family_instance_index;
-    data.run_type = BenchmarkReporter::Run::RT_Aggregate;
-    data.threads = reports[0].threads;
-    data.repetitions = reports[0].repetitions;
-    data.repetition_index = Run::no_repetition_index;
-    data.aggregate_name = Stat.name_;
-    data.aggregate_unit = Stat.unit_;
-    data.report_label = report_label;
-
-    // It is incorrect to say that an aggregate is computed over
-    // run's iterations, because those iterations already got averaged.
-    // Similarly, if there are N repetitions with 1 iterations each,
-    // an aggregate will be computed over N measurements, not 1.
-    // Thus it is best to simply use the count of separate reports.
-    data.iterations = reports.size();
-
-    data.real_accumulated_time = Stat.compute_(real_accumulated_time_stat);
-    data.cpu_accumulated_time = Stat.compute_(cpu_accumulated_time_stat);
-
-    if (data.aggregate_unit == StatisticUnit::kTime) {
-      // We will divide these times by data.iterations when reporting, but the
-      // data.iterations is not necessarily the scale of these measurements,
-      // because in each repetition, these timers are sum over all the iters.
-      // And if we want to say that the stats are over N repetitions and not
-      // M iterations, we need to multiply these by (N/M).
-      data.real_accumulated_time *= iteration_rescale_factor;
-      data.cpu_accumulated_time *= iteration_rescale_factor;
-    }
-
-    data.time_unit = reports[0].time_unit;
-
-    // user counters
-    for (auto const& kv : counter_stats) {
-      // Do *NOT* rescale the custom counters. They are already properly scaled.
-      const auto uc_stat = Stat.compute_(kv.second.s);
-      auto c = Counter(uc_stat, counter_stats[kv.first].c.flags,
-                       counter_stats[kv.first].c.oneK);
-      data.counters[kv.first] = c;
-    }
-
-    results.push_back(data);
-  }
-
-  return results;
-}
-
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/statistics.h b/3rdparty/benchmark/src/statistics.h
deleted file mode 100644
index a9545a58..00000000
--- a/3rdparty/benchmark/src/statistics.h
+++ /dev/null
@@ -1,38 +0,0 @@
-// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
-// Copyright 2017 Roman Lebedev. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef STATISTICS_H_
-#define STATISTICS_H_
-
-#include <vector>
-
-#include "benchmark/benchmark.h"
-
-namespace benchmark {
-
-// Return a vector containing the mean, median and standard devation information
-// (and any user-specified info) for the specified list of reports. If 'reports'
-// contains less than two non-errored runs an empty vector is returned
-std::vector<BenchmarkReporter::Run> ComputeStats(
-    const std::vector<BenchmarkReporter::Run>& reports);
-
-double StatisticsMean(const std::vector<double>& v);
-double StatisticsMedian(const std::vector<double>& v);
-double StatisticsStdDev(const std::vector<double>& v);
-double StatisticsCV(const std::vector<double>& v);
-
-}  // end namespace benchmark
-
-#endif  // STATISTICS_H_
diff --git a/3rdparty/benchmark/src/string_util.cc b/3rdparty/benchmark/src/string_util.cc
deleted file mode 100644
index 401fa13d..00000000
--- a/3rdparty/benchmark/src/string_util.cc
+++ /dev/null
@@ -1,265 +0,0 @@
-#include "string_util.h"
-
-#include <array>
-#ifdef BENCHMARK_STL_ANDROID_GNUSTL
-#include <cerrno>
-#endif
-#include <cmath>
-#include <cstdarg>
-#include <cstdio>
-#include <memory>
-#include <sstream>
-
-#include "arraysize.h"
-
-namespace benchmark {
-namespace {
-
-// kilo, Mega, Giga, Tera, Peta, Exa, Zetta, Yotta.
-const char kBigSIUnits[] = "kMGTPEZY";
-// Kibi, Mebi, Gibi, Tebi, Pebi, Exbi, Zebi, Yobi.
-const char kBigIECUnits[] = "KMGTPEZY";
-// milli, micro, nano, pico, femto, atto, zepto, yocto.
-const char kSmallSIUnits[] = "munpfazy";
-
-// We require that all three arrays have the same size.
-static_assert(arraysize(kBigSIUnits) == arraysize(kBigIECUnits),
-              "SI and IEC unit arrays must be the same size");
-static_assert(arraysize(kSmallSIUnits) == arraysize(kBigSIUnits),
-              "Small SI and Big SI unit arrays must be the same size");
-
-static const int64_t kUnitsSize = arraysize(kBigSIUnits);
-
-void ToExponentAndMantissa(double val, double thresh, int precision,
-                           double one_k, std::string* mantissa,
-                           int64_t* exponent) {
-  std::stringstream mantissa_stream;
-
-  if (val < 0) {
-    mantissa_stream << "-";
-    val = -val;
-  }
-
-  // Adjust threshold so that it never excludes things which can't be rendered
-  // in 'precision' digits.
-  const double adjusted_threshold =
-      std::max(thresh, 1.0 / std::pow(10.0, precision));
-  const double big_threshold = adjusted_threshold * one_k;
-  const double small_threshold = adjusted_threshold;
-  // Values in ]simple_threshold,small_threshold[ will be printed as-is
-  const double simple_threshold = 0.01;
-
-  if (val > big_threshold) {
-    // Positive powers
-    double scaled = val;
-    for (size_t i = 0; i < arraysize(kBigSIUnits); ++i) {
-      scaled /= one_k;
-      if (scaled <= big_threshold) {
-        mantissa_stream << scaled;
-        *exponent = i + 1;
-        *mantissa = mantissa_stream.str();
-        return;
-      }
-    }
-    mantissa_stream << val;
-    *exponent = 0;
-  } else if (val < small_threshold) {
-    // Negative powers
-    if (val < simple_threshold) {
-      double scaled = val;
-      for (size_t i = 0; i < arraysize(kSmallSIUnits); ++i) {
-        scaled *= one_k;
-        if (scaled >= small_threshold) {
-          mantissa_stream << scaled;
-          *exponent = -static_cast<int64_t>(i + 1);
-          *mantissa = mantissa_stream.str();
-          return;
-        }
-      }
-    }
-    mantissa_stream << val;
-    *exponent = 0;
-  } else {
-    mantissa_stream << val;
-    *exponent = 0;
-  }
-  *mantissa = mantissa_stream.str();
-}
-
-std::string ExponentToPrefix(int64_t exponent, bool iec) {
-  if (exponent == 0) return "";
-
-  const int64_t index = (exponent > 0 ? exponent - 1 : -exponent - 1);
-  if (index >= kUnitsSize) return "";
-
-  const char* array =
-      (exponent > 0 ? (iec ? kBigIECUnits : kBigSIUnits) : kSmallSIUnits);
-  if (iec)
-    return array[index] + std::string("i");
-  else
-    return std::string(1, array[index]);
-}
-
-std::string ToBinaryStringFullySpecified(double value, double threshold,
-                                         int precision, double one_k = 1024.0) {
-  std::string mantissa;
-  int64_t exponent;
-  ToExponentAndMantissa(value, threshold, precision, one_k, &mantissa,
-                        &exponent);
-  return mantissa + ExponentToPrefix(exponent, false);
-}
-
-}  // end namespace
-
-void AppendHumanReadable(int n, std::string* str) {
-  std::stringstream ss;
-  // Round down to the nearest SI prefix.
-  ss << ToBinaryStringFullySpecified(n, 1.0, 0);
-  *str += ss.str();
-}
-
-std::string HumanReadableNumber(double n, double one_k) {
-  // 1.1 means that figures up to 1.1k should be shown with the next unit down;
-  // this softens edge effects.
-  // 1 means that we should show one decimal place of precision.
-  return ToBinaryStringFullySpecified(n, 1.1, 1, one_k);
-}
-
-std::string StrFormatImp(const char* msg, va_list args) {
-  // we might need a second shot at this, so pre-emptivly make a copy
-  va_list args_cp;
-  va_copy(args_cp, args);
-
-  // TODO(ericwf): use std::array for first attempt to avoid one memory
-  // allocation guess what the size might be
-  std::array<char, 256> local_buff;
-  std::size_t size = local_buff.size();
-  // 2015-10-08: vsnprintf is used instead of snd::vsnprintf due to a limitation
-  // in the android-ndk
-  auto ret = vsnprintf(local_buff.data(), size, msg, args_cp);
-
-  va_end(args_cp);
-
-  // handle empty expansion
-  if (ret == 0) return std::string{};
-  if (static_cast<std::size_t>(ret) < size)
-    return std::string(local_buff.data());
-
-  // we did not provide a long enough buffer on our first attempt.
-  // add 1 to size to account for null-byte in size cast to prevent overflow
-  size = static_cast<std::size_t>(ret) + 1;
-  auto buff_ptr = std::unique_ptr<char[]>(new char[size]);
-  // 2015-10-08: vsnprintf is used instead of snd::vsnprintf due to a limitation
-  // in the android-ndk
-  vsnprintf(buff_ptr.get(), size, msg, args);
-  return std::string(buff_ptr.get());
-}
-
-std::string StrFormat(const char* format, ...) {
-  va_list args;
-  va_start(args, format);
-  std::string tmp = StrFormatImp(format, args);
-  va_end(args);
-  return tmp;
-}
-
-std::vector<std::string> StrSplit(const std::string& str, char delim) {
-  if (str.empty()) return {};
-  std::vector<std::string> ret;
-  size_t first = 0;
-  size_t next = str.find(delim);
-  for (; next != std::string::npos;
-       first = next + 1, next = str.find(delim, first)) {
-    ret.push_back(str.substr(first, next - first));
-  }
-  ret.push_back(str.substr(first));
-  return ret;
-}
-
-#ifdef BENCHMARK_STL_ANDROID_GNUSTL
-/*
- * GNU STL in Android NDK lacks support for some C++11 functions, including
- * stoul, stoi, stod. We reimplement them here using C functions strtoul,
- * strtol, strtod. Note that reimplemented functions are in benchmark::
- * namespace, not std:: namespace.
- */
-unsigned long stoul(const std::string& str, size_t* pos, int base) {
-  /* Record previous errno */
-  const int oldErrno = errno;
-  errno = 0;
-
-  const char* strStart = str.c_str();
-  char* strEnd = const_cast<char*>(strStart);
-  const unsigned long result = strtoul(strStart, &strEnd, base);
-
-  const int strtoulErrno = errno;
-  /* Restore previous errno */
-  errno = oldErrno;
-
-  /* Check for errors and return */
-  if (strtoulErrno == ERANGE) {
-    throw std::out_of_range("stoul failed: " + str +
-                            " is outside of range of unsigned long");
-  } else if (strEnd == strStart || strtoulErrno != 0) {
-    throw std::invalid_argument("stoul failed: " + str + " is not an integer");
-  }
-  if (pos != nullptr) {
-    *pos = static_cast<size_t>(strEnd - strStart);
-  }
-  return result;
-}
-
-int stoi(const std::string& str, size_t* pos, int base) {
-  /* Record previous errno */
-  const int oldErrno = errno;
-  errno = 0;
-
-  const char* strStart = str.c_str();
-  char* strEnd = const_cast<char*>(strStart);
-  const long result = strtol(strStart, &strEnd, base);
-
-  const int strtolErrno = errno;
-  /* Restore previous errno */
-  errno = oldErrno;
-
-  /* Check for errors and return */
-  if (strtolErrno == ERANGE || long(int(result)) != result) {
-    throw std::out_of_range("stoul failed: " + str +
-                            " is outside of range of int");
-  } else if (strEnd == strStart || strtolErrno != 0) {
-    throw std::invalid_argument("stoul failed: " + str + " is not an integer");
-  }
-  if (pos != nullptr) {
-    *pos = static_cast<size_t>(strEnd - strStart);
-  }
-  return int(result);
-}
-
-double stod(const std::string& str, size_t* pos) {
-  /* Record previous errno */
-  const int oldErrno = errno;
-  errno = 0;
-
-  const char* strStart = str.c_str();
-  char* strEnd = const_cast<char*>(strStart);
-  const double result = strtod(strStart, &strEnd);
-
-  /* Restore previous errno */
-  const int strtodErrno = errno;
-  errno = oldErrno;
-
-  /* Check for errors and return */
-  if (strtodErrno == ERANGE) {
-    throw std::out_of_range("stoul failed: " + str +
-                            " is outside of range of int");
-  } else if (strEnd == strStart || strtodErrno != 0) {
-    throw std::invalid_argument("stoul failed: " + str + " is not an integer");
-  }
-  if (pos != nullptr) {
-    *pos = static_cast<size_t>(strEnd - strStart);
-  }
-  return result;
-}
-#endif
-
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/string_util.h b/3rdparty/benchmark/src/string_util.h
deleted file mode 100644
index ff3b7da4..00000000
--- a/3rdparty/benchmark/src/string_util.h
+++ /dev/null
@@ -1,65 +0,0 @@
-#ifndef BENCHMARK_STRING_UTIL_H_
-#define BENCHMARK_STRING_UTIL_H_
-
-#include <sstream>
-#include <string>
-#include <utility>
-
-#include "internal_macros.h"
-
-namespace benchmark {
-
-void AppendHumanReadable(int n, std::string* str);
-
-std::string HumanReadableNumber(double n, double one_k = 1024.0);
-
-#if defined(__MINGW32__)
-__attribute__((format(__MINGW_PRINTF_FORMAT, 1, 2)))
-#elif defined(__GNUC__)
-__attribute__((format(printf, 1, 2)))
-#endif
-std::string
-StrFormat(const char* format, ...);
-
-inline std::ostream& StrCatImp(std::ostream& out) BENCHMARK_NOEXCEPT {
-  return out;
-}
-
-template <class First, class... Rest>
-inline std::ostream& StrCatImp(std::ostream& out, First&& f, Rest&&... rest) {
-  out << std::forward<First>(f);
-  return StrCatImp(out, std::forward<Rest>(rest)...);
-}
-
-template <class... Args>
-inline std::string StrCat(Args&&... args) {
-  std::ostringstream ss;
-  StrCatImp(ss, std::forward<Args>(args)...);
-  return ss.str();
-}
-
-std::vector<std::string> StrSplit(const std::string& str, char delim);
-
-// Disable lint checking for this block since it re-implements C functions.
-// NOLINTBEGIN
-#ifdef BENCHMARK_STL_ANDROID_GNUSTL
-/*
- * GNU STL in Android NDK lacks support for some C++11 functions, including
- * stoul, stoi, stod. We reimplement them here using C functions strtoul,
- * strtol, strtod. Note that reimplemented functions are in benchmark::
- * namespace, not std:: namespace.
- */
-unsigned long stoul(const std::string& str, size_t* pos = nullptr,
-                    int base = 10);
-int stoi(const std::string& str, size_t* pos = nullptr, int base = 10);
-double stod(const std::string& str, size_t* pos = nullptr);
-#else
-using std::stod;   // NOLINT(misc-unused-using-decls)
-using std::stoi;   // NOLINT(misc-unused-using-decls)
-using std::stoul;  // NOLINT(misc-unused-using-decls)
-#endif
-// NOLINTEND
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_STRING_UTIL_H_
diff --git a/3rdparty/benchmark/src/sysinfo.cc b/3rdparty/benchmark/src/sysinfo.cc
deleted file mode 100644
index 87dcfb46..00000000
--- a/3rdparty/benchmark/src/sysinfo.cc
+++ /dev/null
@@ -1,725 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "internal_macros.h"
-
-#ifdef BENCHMARK_OS_WINDOWS
-#include <shlwapi.h>
-#undef StrCat  // Don't let StrCat in string_util.h be renamed to lstrcatA
-#include <versionhelpers.h>
-#include <windows.h>
-
-#include <codecvt>
-#else
-#include <fcntl.h>
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <sys/types.h>  // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
-#include <unistd.h>
-#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_MACOSX || \
-    defined BENCHMARK_OS_NETBSD || defined BENCHMARK_OS_OPENBSD || \
-    defined BENCHMARK_OS_DRAGONFLY
-#define BENCHMARK_HAS_SYSCTL
-#include <sys/sysctl.h>
-#endif
-#endif
-#if defined(BENCHMARK_OS_SOLARIS)
-#include <kstat.h>
-#endif
-#if defined(BENCHMARK_OS_QNX)
-#include <sys/syspage.h>
-#endif
-
-#include <algorithm>
-#include <array>
-#include <bitset>
-#include <cerrno>
-#include <climits>
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <fstream>
-#include <iostream>
-#include <iterator>
-#include <limits>
-#include <locale>
-#include <memory>
-#include <sstream>
-#include <utility>
-
-#include "check.h"
-#include "cycleclock.h"
-#include "internal_macros.h"
-#include "log.h"
-#include "sleep.h"
-#include "string_util.h"
-
-namespace benchmark {
-namespace {
-
-void PrintImp(std::ostream& out) { out << std::endl; }
-
-template <class First, class... Rest>
-void PrintImp(std::ostream& out, First&& f, Rest&&... rest) {
-  out << std::forward<First>(f);
-  PrintImp(out, std::forward<Rest>(rest)...);
-}
-
-template <class... Args>
-BENCHMARK_NORETURN void PrintErrorAndDie(Args&&... args) {
-  PrintImp(std::cerr, std::forward<Args>(args)...);
-  std::exit(EXIT_FAILURE);
-}
-
-#ifdef BENCHMARK_HAS_SYSCTL
-
-/// ValueUnion - A type used to correctly alias the byte-for-byte output of
-/// `sysctl` with the result type it's to be interpreted as.
-struct ValueUnion {
-  union DataT {
-    uint32_t uint32_value;
-    uint64_t uint64_value;
-    // For correct aliasing of union members from bytes.
-    char bytes[8];
-  };
-  using DataPtr = std::unique_ptr<DataT, decltype(&std::free)>;
-
-  // The size of the data union member + its trailing array size.
-  size_t Size;
-  DataPtr Buff;
-
- public:
-  ValueUnion() : Size(0), Buff(nullptr, &std::free) {}
-
-  explicit ValueUnion(size_t BuffSize)
-      : Size(sizeof(DataT) + BuffSize),
-        Buff(::new (std::malloc(Size)) DataT(), &std::free) {}
-
-  ValueUnion(ValueUnion&& other) = default;
-
-  explicit operator bool() const { return bool(Buff); }
-
-  char* data() const { return Buff->bytes; }
-
-  std::string GetAsString() const { return std::string(data()); }
-
-  int64_t GetAsInteger() const {
-    if (Size == sizeof(Buff->uint32_value))
-      return static_cast<int32_t>(Buff->uint32_value);
-    else if (Size == sizeof(Buff->uint64_value))
-      return static_cast<int64_t>(Buff->uint64_value);
-    BENCHMARK_UNREACHABLE();
-  }
-
-  uint64_t GetAsUnsigned() const {
-    if (Size == sizeof(Buff->uint32_value))
-      return Buff->uint32_value;
-    else if (Size == sizeof(Buff->uint64_value))
-      return Buff->uint64_value;
-    BENCHMARK_UNREACHABLE();
-  }
-
-  template <class T, int N>
-  std::array<T, N> GetAsArray() {
-    const int ArrSize = sizeof(T) * N;
-    BM_CHECK_LE(ArrSize, Size);
-    std::array<T, N> Arr;
-    std::memcpy(Arr.data(), data(), ArrSize);
-    return Arr;
-  }
-};
-
-ValueUnion GetSysctlImp(std::string const& Name) {
-#if defined BENCHMARK_OS_OPENBSD
-  int mib[2];
-
-  mib[0] = CTL_HW;
-  if ((Name == "hw.ncpu") || (Name == "hw.cpuspeed")) {
-    ValueUnion buff(sizeof(int));
-
-    if (Name == "hw.ncpu") {
-      mib[1] = HW_NCPU;
-    } else {
-      mib[1] = HW_CPUSPEED;
-    }
-
-    if (sysctl(mib, 2, buff.data(), &buff.Size, nullptr, 0) == -1) {
-      return ValueUnion();
-    }
-    return buff;
-  }
-  return ValueUnion();
-#else
-  size_t CurBuffSize = 0;
-  if (sysctlbyname(Name.c_str(), nullptr, &CurBuffSize, nullptr, 0) == -1)
-    return ValueUnion();
-
-  ValueUnion buff(CurBuffSize);
-  if (sysctlbyname(Name.c_str(), buff.data(), &buff.Size, nullptr, 0) == 0)
-    return buff;
-  return ValueUnion();
-#endif
-}
-
-BENCHMARK_MAYBE_UNUSED
-bool GetSysctl(std::string const& Name, std::string* Out) {
-  Out->clear();
-  auto Buff = GetSysctlImp(Name);
-  if (!Buff) return false;
-  Out->assign(Buff.data());
-  return true;
-}
-
-template <class Tp,
-          class = typename std::enable_if<std::is_integral<Tp>::value>::type>
-bool GetSysctl(std::string const& Name, Tp* Out) {
-  *Out = 0;
-  auto Buff = GetSysctlImp(Name);
-  if (!Buff) return false;
-  *Out = static_cast<Tp>(Buff.GetAsUnsigned());
-  return true;
-}
-
-template <class Tp, size_t N>
-bool GetSysctl(std::string const& Name, std::array<Tp, N>* Out) {
-  auto Buff = GetSysctlImp(Name);
-  if (!Buff) return false;
-  *Out = Buff.GetAsArray<Tp, N>();
-  return true;
-}
-#endif
-
-template <class ArgT>
-bool ReadFromFile(std::string const& fname, ArgT* arg) {
-  *arg = ArgT();
-  std::ifstream f(fname.c_str());
-  if (!f.is_open()) return false;
-  f >> *arg;
-  return f.good();
-}
-
-CPUInfo::Scaling CpuScaling(int num_cpus) {
-  // We don't have a valid CPU count, so don't even bother.
-  if (num_cpus <= 0) return CPUInfo::Scaling::UNKNOWN;
-#if defined(BENCHMARK_OS_QNX)
-  return CPUInfo::Scaling::UNKNOWN;
-#elif !defined(BENCHMARK_OS_WINDOWS)
-  // On Linux, the CPUfreq subsystem exposes CPU information as files on the
-  // local file system. If reading the exported files fails, then we may not be
-  // running on Linux, so we silently ignore all the read errors.
-  std::string res;
-  for (int cpu = 0; cpu < num_cpus; ++cpu) {
-    std::string governor_file =
-        StrCat("/sys/devices/system/cpu/cpu", cpu, "/cpufreq/scaling_governor");
-    if (ReadFromFile(governor_file, &res) && res != "performance")
-      return CPUInfo::Scaling::ENABLED;
-  }
-  return CPUInfo::Scaling::DISABLED;
-#else
-  return CPUInfo::Scaling::UNKNOWN;
-#endif
-}
-
-int CountSetBitsInCPUMap(std::string Val) {
-  auto CountBits = [](std::string Part) {
-    using CPUMask = std::bitset<sizeof(std::uintptr_t) * CHAR_BIT>;
-    Part = "0x" + Part;
-    CPUMask Mask(benchmark::stoul(Part, nullptr, 16));
-    return static_cast<int>(Mask.count());
-  };
-  size_t Pos;
-  int total = 0;
-  while ((Pos = Val.find(',')) != std::string::npos) {
-    total += CountBits(Val.substr(0, Pos));
-    Val = Val.substr(Pos + 1);
-  }
-  if (!Val.empty()) {
-    total += CountBits(Val);
-  }
-  return total;
-}
-
-BENCHMARK_MAYBE_UNUSED
-std::vector<CPUInfo::CacheInfo> GetCacheSizesFromKVFS() {
-  std::vector<CPUInfo::CacheInfo> res;
-  std::string dir = "/sys/devices/system/cpu/cpu0/cache/";
-  int Idx = 0;
-  while (true) {
-    CPUInfo::CacheInfo info;
-    std::string FPath = StrCat(dir, "index", Idx++, "/");
-    std::ifstream f(StrCat(FPath, "size").c_str());
-    if (!f.is_open()) break;
-    std::string suffix;
-    f >> info.size;
-    if (f.fail())
-      PrintErrorAndDie("Failed while reading file '", FPath, "size'");
-    if (f.good()) {
-      f >> suffix;
-      if (f.bad())
-        PrintErrorAndDie(
-            "Invalid cache size format: failed to read size suffix");
-      else if (f && suffix != "K")
-        PrintErrorAndDie("Invalid cache size format: Expected bytes ", suffix);
-      else if (suffix == "K")
-        info.size *= 1024;
-    }
-    if (!ReadFromFile(StrCat(FPath, "type"), &info.type))
-      PrintErrorAndDie("Failed to read from file ", FPath, "type");
-    if (!ReadFromFile(StrCat(FPath, "level"), &info.level))
-      PrintErrorAndDie("Failed to read from file ", FPath, "level");
-    std::string map_str;
-    if (!ReadFromFile(StrCat(FPath, "shared_cpu_map"), &map_str))
-      PrintErrorAndDie("Failed to read from file ", FPath, "shared_cpu_map");
-    info.num_sharing = CountSetBitsInCPUMap(map_str);
-    res.push_back(info);
-  }
-
-  return res;
-}
-
-#ifdef BENCHMARK_OS_MACOSX
-std::vector<CPUInfo::CacheInfo> GetCacheSizesMacOSX() {
-  std::vector<CPUInfo::CacheInfo> res;
-  std::array<uint64_t, 4> CacheCounts{{0, 0, 0, 0}};
-  GetSysctl("hw.cacheconfig", &CacheCounts);
-
-  struct {
-    std::string name;
-    std::string type;
-    int level;
-    uint64_t num_sharing;
-  } Cases[] = {{"hw.l1dcachesize", "Data", 1, CacheCounts[1]},
-               {"hw.l1icachesize", "Instruction", 1, CacheCounts[1]},
-               {"hw.l2cachesize", "Unified", 2, CacheCounts[2]},
-               {"hw.l3cachesize", "Unified", 3, CacheCounts[3]}};
-  for (auto& C : Cases) {
-    int val;
-    if (!GetSysctl(C.name, &val)) continue;
-    CPUInfo::CacheInfo info;
-    info.type = C.type;
-    info.level = C.level;
-    info.size = val;
-    info.num_sharing = static_cast<int>(C.num_sharing);
-    res.push_back(std::move(info));
-  }
-  return res;
-}
-#elif defined(BENCHMARK_OS_WINDOWS)
-std::vector<CPUInfo::CacheInfo> GetCacheSizesWindows() {
-  std::vector<CPUInfo::CacheInfo> res;
-  DWORD buffer_size = 0;
-  using PInfo = SYSTEM_LOGICAL_PROCESSOR_INFORMATION;
-  using CInfo = CACHE_DESCRIPTOR;
-
-  using UPtr = std::unique_ptr<PInfo, decltype(&std::free)>;
-  GetLogicalProcessorInformation(nullptr, &buffer_size);
-  UPtr buff((PInfo*)malloc(buffer_size), &std::free);
-  if (!GetLogicalProcessorInformation(buff.get(), &buffer_size))
-    PrintErrorAndDie("Failed during call to GetLogicalProcessorInformation: ",
-                     GetLastError());
-
-  PInfo* it = buff.get();
-  PInfo* end = buff.get() + (buffer_size / sizeof(PInfo));
-
-  for (; it != end; ++it) {
-    if (it->Relationship != RelationCache) continue;
-    using BitSet = std::bitset<sizeof(ULONG_PTR) * CHAR_BIT>;
-    BitSet B(it->ProcessorMask);
-    // To prevent duplicates, only consider caches where CPU 0 is specified
-    if (!B.test(0)) continue;
-    CInfo* Cache = &it->Cache;
-    CPUInfo::CacheInfo C;
-    C.num_sharing = static_cast<int>(B.count());
-    C.level = Cache->Level;
-    C.size = Cache->Size;
-    C.type = "Unknown";
-    switch (Cache->Type) {
-      case CacheUnified:
-        C.type = "Unified";
-        break;
-      case CacheInstruction:
-        C.type = "Instruction";
-        break;
-      case CacheData:
-        C.type = "Data";
-        break;
-      case CacheTrace:
-        C.type = "Trace";
-        break;
-    }
-    res.push_back(C);
-  }
-  return res;
-}
-#elif BENCHMARK_OS_QNX
-std::vector<CPUInfo::CacheInfo> GetCacheSizesQNX() {
-  std::vector<CPUInfo::CacheInfo> res;
-  struct cacheattr_entry* cache = SYSPAGE_ENTRY(cacheattr);
-  uint32_t const elsize = SYSPAGE_ELEMENT_SIZE(cacheattr);
-  int num = SYSPAGE_ENTRY_SIZE(cacheattr) / elsize;
-  for (int i = 0; i < num; ++i) {
-    CPUInfo::CacheInfo info;
-    switch (cache->flags) {
-      case CACHE_FLAG_INSTR:
-        info.type = "Instruction";
-        info.level = 1;
-        break;
-      case CACHE_FLAG_DATA:
-        info.type = "Data";
-        info.level = 1;
-        break;
-      case CACHE_FLAG_UNIFIED:
-        info.type = "Unified";
-        info.level = 2;
-        break;
-      case CACHE_FLAG_SHARED:
-        info.type = "Shared";
-        info.level = 3;
-        break;
-      default:
-        continue;
-        break;
-    }
-    info.size = cache->line_size * cache->num_lines;
-    info.num_sharing = 0;
-    res.push_back(std::move(info));
-    cache = SYSPAGE_ARRAY_ADJ_OFFSET(cacheattr, cache, elsize);
-  }
-  return res;
-}
-#endif
-
-std::vector<CPUInfo::CacheInfo> GetCacheSizes() {
-#ifdef BENCHMARK_OS_MACOSX
-  return GetCacheSizesMacOSX();
-#elif defined(BENCHMARK_OS_WINDOWS)
-  return GetCacheSizesWindows();
-#elif defined(BENCHMARK_OS_QNX)
-  return GetCacheSizesQNX();
-#else
-  return GetCacheSizesFromKVFS();
-#endif
-}
-
-std::string GetSystemName() {
-#if defined(BENCHMARK_OS_WINDOWS)
-  std::string str;
-  const unsigned COUNT = MAX_COMPUTERNAME_LENGTH + 1;
-  TCHAR hostname[COUNT] = {'\0'};
-  DWORD DWCOUNT = COUNT;
-  if (!GetComputerName(hostname, &DWCOUNT)) return std::string("");
-#ifndef UNICODE
-  str = std::string(hostname, DWCOUNT);
-#else
-  // Using wstring_convert, Is deprecated in C++17
-  using convert_type = std::codecvt_utf8<wchar_t>;
-  std::wstring_convert<convert_type, wchar_t> converter;
-  std::wstring wStr(hostname, DWCOUNT);
-  str = converter.to_bytes(wStr);
-#endif
-  return str;
-#else  // defined(BENCHMARK_OS_WINDOWS)
-#ifndef HOST_NAME_MAX
-#ifdef BENCHMARK_HAS_SYSCTL  // BSD/Mac Doesnt have HOST_NAME_MAX defined
-#define HOST_NAME_MAX 64
-#elif defined(BENCHMARK_OS_NACL)
-#define HOST_NAME_MAX 64
-#elif defined(BENCHMARK_OS_QNX)
-#define HOST_NAME_MAX 154
-#elif defined(BENCHMARK_OS_RTEMS)
-#define HOST_NAME_MAX 256
-#else
-#pragma message("HOST_NAME_MAX not defined. using 64")
-#define HOST_NAME_MAX 64
-#endif
-#endif  // def HOST_NAME_MAX
-  char hostname[HOST_NAME_MAX];
-  int retVal = gethostname(hostname, HOST_NAME_MAX);
-  if (retVal != 0) return std::string("");
-  return std::string(hostname);
-#endif  // Catch-all POSIX block.
-}
-
-int GetNumCPUs() {
-#ifdef BENCHMARK_HAS_SYSCTL
-  int NumCPU = -1;
-  if (GetSysctl("hw.ncpu", &NumCPU)) return NumCPU;
-  fprintf(stderr, "Err: %s\n", strerror(errno));
-  std::exit(EXIT_FAILURE);
-#elif defined(BENCHMARK_OS_WINDOWS)
-  SYSTEM_INFO sysinfo;
-  // Use memset as opposed to = {} to avoid GCC missing initializer false
-  // positives.
-  std::memset(&sysinfo, 0, sizeof(SYSTEM_INFO));
-  GetSystemInfo(&sysinfo);
-  return sysinfo.dwNumberOfProcessors;  // number of logical
-                                        // processors in the current
-                                        // group
-#elif defined(BENCHMARK_OS_SOLARIS)
-  // Returns -1 in case of a failure.
-  int NumCPU = sysconf(_SC_NPROCESSORS_ONLN);
-  if (NumCPU < 0) {
-    fprintf(stderr, "sysconf(_SC_NPROCESSORS_ONLN) failed with error: %s\n",
-            strerror(errno));
-  }
-  return NumCPU;
-#elif defined(BENCHMARK_OS_QNX)
-  return static_cast<int>(_syspage_ptr->num_cpu);
-#else
-  int NumCPUs = 0;
-  int MaxID = -1;
-  std::ifstream f("/proc/cpuinfo");
-  if (!f.is_open()) {
-    std::cerr << "failed to open /proc/cpuinfo\n";
-    return -1;
-  }
-  const std::string Key = "processor";
-  std::string ln;
-  while (std::getline(f, ln)) {
-    if (ln.empty()) continue;
-    size_t SplitIdx = ln.find(':');
-    std::string value;
-#if defined(__s390__)
-    // s390 has another format in /proc/cpuinfo
-    // it needs to be parsed differently
-    if (SplitIdx != std::string::npos)
-      value = ln.substr(Key.size() + 1, SplitIdx - Key.size() - 1);
-#else
-    if (SplitIdx != std::string::npos) value = ln.substr(SplitIdx + 1);
-#endif
-    if (ln.size() >= Key.size() && ln.compare(0, Key.size(), Key) == 0) {
-      NumCPUs++;
-      if (!value.empty()) {
-        int CurID = benchmark::stoi(value);
-        MaxID = std::max(CurID, MaxID);
-      }
-    }
-  }
-  if (f.bad()) {
-    std::cerr << "Failure reading /proc/cpuinfo\n";
-    return -1;
-  }
-  if (!f.eof()) {
-    std::cerr << "Failed to read to end of /proc/cpuinfo\n";
-    return -1;
-  }
-  f.close();
-
-  if ((MaxID + 1) != NumCPUs) {
-    fprintf(stderr,
-            "CPU ID assignments in /proc/cpuinfo seem messed up."
-            " This is usually caused by a bad BIOS.\n");
-  }
-  return NumCPUs;
-#endif
-  BENCHMARK_UNREACHABLE();
-}
-
-double GetCPUCyclesPerSecond(CPUInfo::Scaling scaling) {
-  // Currently, scaling is only used on linux path here,
-  // suppress diagnostics about it being unused on other paths.
-  (void)scaling;
-
-#if defined BENCHMARK_OS_LINUX || defined BENCHMARK_OS_CYGWIN
-  long freq;
-
-  // If the kernel is exporting the tsc frequency use that. There are issues
-  // where cpuinfo_max_freq cannot be relied on because the BIOS may be
-  // exporintg an invalid p-state (on x86) or p-states may be used to put the
-  // processor in a new mode (turbo mode). Essentially, those frequencies
-  // cannot always be relied upon. The same reasons apply to /proc/cpuinfo as
-  // well.
-  if (ReadFromFile("/sys/devices/system/cpu/cpu0/tsc_freq_khz", &freq)
-      // If CPU scaling is disabled, use the *current* frequency.
-      // Note that we specifically don't want to read cpuinfo_cur_freq,
-      // because it is only readable by root.
-      || (scaling == CPUInfo::Scaling::DISABLED &&
-          ReadFromFile("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq",
-                       &freq))
-      // Otherwise, if CPU scaling may be in effect, we want to use
-      // the *maximum* frequency, not whatever CPU speed some random processor
-      // happens to be using now.
-      || ReadFromFile("/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq",
-                      &freq)) {
-    // The value is in kHz (as the file name suggests).  For example, on a
-    // 2GHz warpstation, the file contains the value "2000000".
-    return freq * 1000.0;
-  }
-
-  const double error_value = -1;
-  double bogo_clock = error_value;
-
-  std::ifstream f("/proc/cpuinfo");
-  if (!f.is_open()) {
-    std::cerr << "failed to open /proc/cpuinfo\n";
-    return error_value;
-  }
-
-  auto startsWithKey = [](std::string const& Value, std::string const& Key) {
-    if (Key.size() > Value.size()) return false;
-    auto Cmp = [&](char X, char Y) {
-      return std::tolower(X) == std::tolower(Y);
-    };
-    return std::equal(Key.begin(), Key.end(), Value.begin(), Cmp);
-  };
-
-  std::string ln;
-  while (std::getline(f, ln)) {
-    if (ln.empty()) continue;
-    size_t SplitIdx = ln.find(':');
-    std::string value;
-    if (SplitIdx != std::string::npos) value = ln.substr(SplitIdx + 1);
-    // When parsing the "cpu MHz" and "bogomips" (fallback) entries, we only
-    // accept positive values. Some environments (virtual machines) report zero,
-    // which would cause infinite looping in WallTime_Init.
-    if (startsWithKey(ln, "cpu MHz")) {
-      if (!value.empty()) {
-        double cycles_per_second = benchmark::stod(value) * 1000000.0;
-        if (cycles_per_second > 0) return cycles_per_second;
-      }
-    } else if (startsWithKey(ln, "bogomips")) {
-      if (!value.empty()) {
-        bogo_clock = benchmark::stod(value) * 1000000.0;
-        if (bogo_clock < 0.0) bogo_clock = error_value;
-      }
-    }
-  }
-  if (f.bad()) {
-    std::cerr << "Failure reading /proc/cpuinfo\n";
-    return error_value;
-  }
-  if (!f.eof()) {
-    std::cerr << "Failed to read to end of /proc/cpuinfo\n";
-    return error_value;
-  }
-  f.close();
-  // If we found the bogomips clock, but nothing better, we'll use it (but
-  // we're not happy about it); otherwise, fallback to the rough estimation
-  // below.
-  if (bogo_clock >= 0.0) return bogo_clock;
-
-#elif defined BENCHMARK_HAS_SYSCTL
-  constexpr auto* FreqStr =
-#if defined(BENCHMARK_OS_FREEBSD) || defined(BENCHMARK_OS_NETBSD)
-      "machdep.tsc_freq";
-#elif defined BENCHMARK_OS_OPENBSD
-      "hw.cpuspeed";
-#elif defined BENCHMARK_OS_DRAGONFLY
-      "hw.tsc_frequency";
-#else
-      "hw.cpufrequency";
-#endif
-  unsigned long long hz = 0;
-#if defined BENCHMARK_OS_OPENBSD
-  if (GetSysctl(FreqStr, &hz)) return hz * 1000000;
-#else
-  if (GetSysctl(FreqStr, &hz)) return hz;
-#endif
-  fprintf(stderr, "Unable to determine clock rate from sysctl: %s: %s\n",
-          FreqStr, strerror(errno));
-
-#elif defined BENCHMARK_OS_WINDOWS
-  // In NT, read MHz from the registry. If we fail to do so or we're in win9x
-  // then make a crude estimate.
-  DWORD data, data_size = sizeof(data);
-  if (IsWindowsXPOrGreater() &&
-      SUCCEEDED(
-          SHGetValueA(HKEY_LOCAL_MACHINE,
-                      "HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0",
-                      "~MHz", nullptr, &data, &data_size)))
-    return static_cast<double>((int64_t)data *
-                               (int64_t)(1000 * 1000));  // was mhz
-#elif defined(BENCHMARK_OS_SOLARIS)
-  kstat_ctl_t* kc = kstat_open();
-  if (!kc) {
-    std::cerr << "failed to open /dev/kstat\n";
-    return -1;
-  }
-  kstat_t* ksp = kstat_lookup(kc, (char*)"cpu_info", -1, (char*)"cpu_info0");
-  if (!ksp) {
-    std::cerr << "failed to lookup in /dev/kstat\n";
-    return -1;
-  }
-  if (kstat_read(kc, ksp, NULL) < 0) {
-    std::cerr << "failed to read from /dev/kstat\n";
-    return -1;
-  }
-  kstat_named_t* knp =
-      (kstat_named_t*)kstat_data_lookup(ksp, (char*)"current_clock_Hz");
-  if (!knp) {
-    std::cerr << "failed to lookup data in /dev/kstat\n";
-    return -1;
-  }
-  if (knp->data_type != KSTAT_DATA_UINT64) {
-    std::cerr << "current_clock_Hz is of unexpected data type: "
-              << knp->data_type << "\n";
-    return -1;
-  }
-  double clock_hz = knp->value.ui64;
-  kstat_close(kc);
-  return clock_hz;
-#elif defined(BENCHMARK_OS_QNX)
-  return static_cast<double>((int64_t)(SYSPAGE_ENTRY(cpuinfo)->speed) *
-                             (int64_t)(1000 * 1000));
-#endif
-  // If we've fallen through, attempt to roughly estimate the CPU clock rate.
-  const int estimate_time_ms = 1000;
-  const auto start_ticks = cycleclock::Now();
-  SleepForMilliseconds(estimate_time_ms);
-  return static_cast<double>(cycleclock::Now() - start_ticks);
-}
-
-std::vector<double> GetLoadAvg() {
-#if (defined BENCHMARK_OS_FREEBSD || defined(BENCHMARK_OS_LINUX) ||     \
-     defined BENCHMARK_OS_MACOSX || defined BENCHMARK_OS_NETBSD ||      \
-     defined BENCHMARK_OS_OPENBSD || defined BENCHMARK_OS_DRAGONFLY) && \
-    !defined(__ANDROID__)
-  constexpr int kMaxSamples = 3;
-  std::vector<double> res(kMaxSamples, 0.0);
-  const int nelem = getloadavg(res.data(), kMaxSamples);
-  if (nelem < 1) {
-    res.clear();
-  } else {
-    res.resize(nelem);
-  }
-  return res;
-#else
-  return {};
-#endif
-}
-
-}  // end namespace
-
-const CPUInfo& CPUInfo::Get() {
-  static const CPUInfo* info = new CPUInfo();
-  return *info;
-}
-
-CPUInfo::CPUInfo()
-    : num_cpus(GetNumCPUs()),
-      scaling(CpuScaling(num_cpus)),
-      cycles_per_second(GetCPUCyclesPerSecond(scaling)),
-      caches(GetCacheSizes()),
-      load_avg(GetLoadAvg()) {}
-
-const SystemInfo& SystemInfo::Get() {
-  static const SystemInfo* info = new SystemInfo();
-  return *info;
-}
-
-SystemInfo::SystemInfo() : name(GetSystemName()) {}
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/thread_manager.h b/3rdparty/benchmark/src/thread_manager.h
deleted file mode 100644
index 46802850..00000000
--- a/3rdparty/benchmark/src/thread_manager.h
+++ /dev/null
@@ -1,63 +0,0 @@
-#ifndef BENCHMARK_THREAD_MANAGER_H
-#define BENCHMARK_THREAD_MANAGER_H
-
-#include <atomic>
-
-#include "benchmark/benchmark.h"
-#include "mutex.h"
-
-namespace benchmark {
-namespace internal {
-
-class ThreadManager {
- public:
-  explicit ThreadManager(int num_threads)
-      : alive_threads_(num_threads), start_stop_barrier_(num_threads) {}
-
-  Mutex& GetBenchmarkMutex() const RETURN_CAPABILITY(benchmark_mutex_) {
-    return benchmark_mutex_;
-  }
-
-  bool StartStopBarrier() EXCLUDES(end_cond_mutex_) {
-    return start_stop_barrier_.wait();
-  }
-
-  void NotifyThreadComplete() EXCLUDES(end_cond_mutex_) {
-    start_stop_barrier_.removeThread();
-    if (--alive_threads_ == 0) {
-      MutexLock lock(end_cond_mutex_);
-      end_condition_.notify_all();
-    }
-  }
-
-  void WaitForAllThreads() EXCLUDES(end_cond_mutex_) {
-    MutexLock lock(end_cond_mutex_);
-    end_condition_.wait(lock.native_handle(),
-                        [this]() { return alive_threads_ == 0; });
-  }
-
-  struct Result {
-    IterationCount iterations = 0;
-    double real_time_used = 0;
-    double cpu_time_used = 0;
-    double manual_time_used = 0;
-    int64_t complexity_n = 0;
-    std::string report_label_;
-    std::string error_message_;
-    bool has_error_ = false;
-    UserCounters counters;
-  };
-  GUARDED_BY(GetBenchmarkMutex()) Result results;
-
- private:
-  mutable Mutex benchmark_mutex_;
-  std::atomic<int> alive_threads_;
-  Barrier start_stop_barrier_;
-  Mutex end_cond_mutex_;
-  Condition end_condition_;
-};
-
-}  // namespace internal
-}  // namespace benchmark
-
-#endif  // BENCHMARK_THREAD_MANAGER_H
diff --git a/3rdparty/benchmark/src/thread_timer.h b/3rdparty/benchmark/src/thread_timer.h
deleted file mode 100644
index eb23f595..00000000
--- a/3rdparty/benchmark/src/thread_timer.h
+++ /dev/null
@@ -1,86 +0,0 @@
-#ifndef BENCHMARK_THREAD_TIMER_H
-#define BENCHMARK_THREAD_TIMER_H
-
-#include "check.h"
-#include "timers.h"
-
-namespace benchmark {
-namespace internal {
-
-class ThreadTimer {
-  explicit ThreadTimer(bool measure_process_cpu_time_)
-      : measure_process_cpu_time(measure_process_cpu_time_) {}
-
- public:
-  static ThreadTimer Create() {
-    return ThreadTimer(/*measure_process_cpu_time_=*/false);
-  }
-  static ThreadTimer CreateProcessCpuTime() {
-    return ThreadTimer(/*measure_process_cpu_time_=*/true);
-  }
-
-  // Called by each thread
-  void StartTimer() {
-    running_ = true;
-    start_real_time_ = ChronoClockNow();
-    start_cpu_time_ = ReadCpuTimerOfChoice();
-  }
-
-  // Called by each thread
-  void StopTimer() {
-    BM_CHECK(running_);
-    running_ = false;
-    real_time_used_ += ChronoClockNow() - start_real_time_;
-    // Floating point error can result in the subtraction producing a negative
-    // time. Guard against that.
-    cpu_time_used_ +=
-        std::max<double>(ReadCpuTimerOfChoice() - start_cpu_time_, 0);
-  }
-
-  // Called by each thread
-  void SetIterationTime(double seconds) { manual_time_used_ += seconds; }
-
-  bool running() const { return running_; }
-
-  // REQUIRES: timer is not running
-  double real_time_used() const {
-    BM_CHECK(!running_);
-    return real_time_used_;
-  }
-
-  // REQUIRES: timer is not running
-  double cpu_time_used() const {
-    BM_CHECK(!running_);
-    return cpu_time_used_;
-  }
-
-  // REQUIRES: timer is not running
-  double manual_time_used() const {
-    BM_CHECK(!running_);
-    return manual_time_used_;
-  }
-
- private:
-  double ReadCpuTimerOfChoice() const {
-    if (measure_process_cpu_time) return ProcessCPUUsage();
-    return ThreadCPUUsage();
-  }
-
-  // should the thread, or the process, time be measured?
-  const bool measure_process_cpu_time;
-
-  bool running_ = false;        // Is the timer running
-  double start_real_time_ = 0;  // If running_
-  double start_cpu_time_ = 0;   // If running_
-
-  // Accumulated time so far (does not contain current slice if running_)
-  double real_time_used_ = 0;
-  double cpu_time_used_ = 0;
-  // Manually set iteration time. User sets this with SetIterationTime(seconds).
-  double manual_time_used_ = 0;
-};
-
-}  // namespace internal
-}  // namespace benchmark
-
-#endif  // BENCHMARK_THREAD_TIMER_H
diff --git a/3rdparty/benchmark/src/timers.cc b/3rdparty/benchmark/src/timers.cc
deleted file mode 100644
index 21d3db20..00000000
--- a/3rdparty/benchmark/src/timers.cc
+++ /dev/null
@@ -1,259 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "timers.h"
-
-#include "internal_macros.h"
-
-#ifdef BENCHMARK_OS_WINDOWS
-#include <shlwapi.h>
-#undef StrCat  // Don't let StrCat in string_util.h be renamed to lstrcatA
-#include <versionhelpers.h>
-#include <windows.h>
-#else
-#include <fcntl.h>
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <sys/types.h>  // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
-#include <unistd.h>
-#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_DRAGONFLY || \
-    defined BENCHMARK_OS_MACOSX
-#include <sys/sysctl.h>
-#endif
-#if defined(BENCHMARK_OS_MACOSX)
-#include <mach/mach_init.h>
-#include <mach/mach_port.h>
-#include <mach/thread_act.h>
-#endif
-#endif
-
-#ifdef BENCHMARK_OS_EMSCRIPTEN
-#include <emscripten.h>
-#endif
-
-#include <cerrno>
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <ctime>
-#include <iostream>
-#include <limits>
-#include <mutex>
-
-#include "check.h"
-#include "log.h"
-#include "sleep.h"
-#include "string_util.h"
-
-namespace benchmark {
-
-// Suppress unused warnings on helper functions.
-#if defined(__GNUC__)
-#pragma GCC diagnostic ignored "-Wunused-function"
-#endif
-
-namespace {
-#if defined(BENCHMARK_OS_WINDOWS)
-double MakeTime(FILETIME const& kernel_time, FILETIME const& user_time) {
-  ULARGE_INTEGER kernel;
-  ULARGE_INTEGER user;
-  kernel.HighPart = kernel_time.dwHighDateTime;
-  kernel.LowPart = kernel_time.dwLowDateTime;
-  user.HighPart = user_time.dwHighDateTime;
-  user.LowPart = user_time.dwLowDateTime;
-  return (static_cast<double>(kernel.QuadPart) +
-          static_cast<double>(user.QuadPart)) *
-         1e-7;
-}
-#elif !defined(BENCHMARK_OS_FUCHSIA)
-double MakeTime(struct rusage const& ru) {
-  return (static_cast<double>(ru.ru_utime.tv_sec) +
-          static_cast<double>(ru.ru_utime.tv_usec) * 1e-6 +
-          static_cast<double>(ru.ru_stime.tv_sec) +
-          static_cast<double>(ru.ru_stime.tv_usec) * 1e-6);
-}
-#endif
-#if defined(BENCHMARK_OS_MACOSX)
-double MakeTime(thread_basic_info_data_t const& info) {
-  return (static_cast<double>(info.user_time.seconds) +
-          static_cast<double>(info.user_time.microseconds) * 1e-6 +
-          static_cast<double>(info.system_time.seconds) +
-          static_cast<double>(info.system_time.microseconds) * 1e-6);
-}
-#endif
-#if defined(CLOCK_PROCESS_CPUTIME_ID) || defined(CLOCK_THREAD_CPUTIME_ID)
-double MakeTime(struct timespec const& ts) {
-  return ts.tv_sec + (static_cast<double>(ts.tv_nsec) * 1e-9);
-}
-#endif
-
-BENCHMARK_NORETURN static void DiagnoseAndExit(const char* msg) {
-  std::cerr << "ERROR: " << msg << std::endl;
-  std::exit(EXIT_FAILURE);
-}
-
-}  // end namespace
-
-double ProcessCPUUsage() {
-#if defined(BENCHMARK_OS_WINDOWS)
-  HANDLE proc = GetCurrentProcess();
-  FILETIME creation_time;
-  FILETIME exit_time;
-  FILETIME kernel_time;
-  FILETIME user_time;
-  if (GetProcessTimes(proc, &creation_time, &exit_time, &kernel_time,
-                      &user_time))
-    return MakeTime(kernel_time, user_time);
-  DiagnoseAndExit("GetProccessTimes() failed");
-#elif defined(BENCHMARK_OS_EMSCRIPTEN)
-  // clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) returns 0 on Emscripten.
-  // Use Emscripten-specific API. Reported CPU time would be exactly the
-  // same as total time, but this is ok because there aren't long-latency
-  // syncronous system calls in Emscripten.
-  return emscripten_get_now() * 1e-3;
-#elif defined(CLOCK_PROCESS_CPUTIME_ID) && !defined(BENCHMARK_OS_MACOSX)
-  // FIXME We want to use clock_gettime, but its not available in MacOS 10.11.
-  // See https://github.com/google/benchmark/pull/292
-  struct timespec spec;
-  if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &spec) == 0)
-    return MakeTime(spec);
-  DiagnoseAndExit("clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) failed");
-#else
-  struct rusage ru;
-  if (getrusage(RUSAGE_SELF, &ru) == 0) return MakeTime(ru);
-  DiagnoseAndExit("getrusage(RUSAGE_SELF, ...) failed");
-#endif
-}
-
-double ThreadCPUUsage() {
-#if defined(BENCHMARK_OS_WINDOWS)
-  HANDLE this_thread = GetCurrentThread();
-  FILETIME creation_time;
-  FILETIME exit_time;
-  FILETIME kernel_time;
-  FILETIME user_time;
-  GetThreadTimes(this_thread, &creation_time, &exit_time, &kernel_time,
-                 &user_time);
-  return MakeTime(kernel_time, user_time);
-#elif defined(BENCHMARK_OS_MACOSX)
-  // FIXME We want to use clock_gettime, but its not available in MacOS 10.11.
-  // See https://github.com/google/benchmark/pull/292
-  mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
-  thread_basic_info_data_t info;
-  mach_port_t thread = pthread_mach_thread_np(pthread_self());
-  if (thread_info(thread, THREAD_BASIC_INFO,
-                  reinterpret_cast<thread_info_t>(&info),
-                  &count) == KERN_SUCCESS) {
-    return MakeTime(info);
-  }
-  DiagnoseAndExit("ThreadCPUUsage() failed when evaluating thread_info");
-#elif defined(BENCHMARK_OS_EMSCRIPTEN)
-  // Emscripten doesn't support traditional threads
-  return ProcessCPUUsage();
-#elif defined(BENCHMARK_OS_RTEMS)
-  // RTEMS doesn't support CLOCK_THREAD_CPUTIME_ID. See
-  // https://github.com/RTEMS/rtems/blob/master/cpukit/posix/src/clockgettime.c
-  return ProcessCPUUsage();
-#elif defined(BENCHMARK_OS_SOLARIS)
-  struct rusage ru;
-  if (getrusage(RUSAGE_LWP, &ru) == 0) return MakeTime(ru);
-  DiagnoseAndExit("getrusage(RUSAGE_LWP, ...) failed");
-#elif defined(CLOCK_THREAD_CPUTIME_ID)
-  struct timespec ts;
-  if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) == 0) return MakeTime(ts);
-  DiagnoseAndExit("clock_gettime(CLOCK_THREAD_CPUTIME_ID, ...) failed");
-#else
-#error Per-thread timing is not available on your system.
-#endif
-}
-
-std::string LocalDateTimeString() {
-  // Write the local time in RFC3339 format yyyy-mm-ddTHH:MM:SS+/-HH:MM.
-  typedef std::chrono::system_clock Clock;
-  std::time_t now = Clock::to_time_t(Clock::now());
-  const std::size_t kTzOffsetLen = 6;
-  const std::size_t kTimestampLen = 19;
-
-  std::size_t tz_len;
-  std::size_t timestamp_len;
-  long int offset_minutes;
-  char tz_offset_sign = '+';
-  // tz_offset is set in one of three ways:
-  // * strftime with %z - This either returns empty or the ISO 8601 time.  The
-  // maximum length an
-  //   ISO 8601 string can be is 7 (e.g. -03:30, plus trailing zero).
-  // * snprintf with %c%02li:%02li - The maximum length is 41 (one for %c, up to
-  // 19 for %02li,
-  //   one for :, up to 19 %02li, plus trailing zero).
-  // * A fixed string of "-00:00".  The maximum length is 7 (-00:00, plus
-  // trailing zero).
-  //
-  // Thus, the maximum size this needs to be is 41.
-  char tz_offset[41];
-  // Long enough buffer to avoid format-overflow warnings
-  char storage[128];
-
-#if defined(BENCHMARK_OS_WINDOWS)
-  std::tm* timeinfo_p = ::localtime(&now);
-#else
-  std::tm timeinfo;
-  std::tm* timeinfo_p = &timeinfo;
-  ::localtime_r(&now, &timeinfo);
-#endif
-
-  tz_len = std::strftime(tz_offset, sizeof(tz_offset), "%z", timeinfo_p);
-
-  if (tz_len < kTzOffsetLen && tz_len > 1) {
-    // Timezone offset was written. strftime writes offset as +HHMM or -HHMM,
-    // RFC3339 specifies an offset as +HH:MM or -HH:MM. To convert, we parse
-    // the offset as an integer, then reprint it to a string.
-
-    offset_minutes = ::strtol(tz_offset, NULL, 10);
-    if (offset_minutes < 0) {
-      offset_minutes *= -1;
-      tz_offset_sign = '-';
-    }
-
-    tz_len =
-        ::snprintf(tz_offset, sizeof(tz_offset), "%c%02li:%02li",
-                   tz_offset_sign, offset_minutes / 100, offset_minutes % 100);
-    BM_CHECK(tz_len == kTzOffsetLen);
-    ((void)tz_len);  // Prevent unused variable warning in optimized build.
-  } else {
-    // Unknown offset. RFC3339 specifies that unknown local offsets should be
-    // written as UTC time with -00:00 timezone.
-#if defined(BENCHMARK_OS_WINDOWS)
-    // Potential race condition if another thread calls localtime or gmtime.
-    timeinfo_p = ::gmtime(&now);
-#else
-    ::gmtime_r(&now, &timeinfo);
-#endif
-
-    strncpy(tz_offset, "-00:00", kTzOffsetLen + 1);
-  }
-
-  timestamp_len =
-      std::strftime(storage, sizeof(storage), "%Y-%m-%dT%H:%M:%S", timeinfo_p);
-  BM_CHECK(timestamp_len == kTimestampLen);
-  // Prevent unused variable warning in optimized build.
-  ((void)kTimestampLen);
-
-  std::strncat(storage, tz_offset, sizeof(storage) - timestamp_len - 1);
-  return std::string(storage);
-}
-
-}  // end namespace benchmark
diff --git a/3rdparty/benchmark/src/timers.h b/3rdparty/benchmark/src/timers.h
deleted file mode 100644
index 65606ccd..00000000
--- a/3rdparty/benchmark/src/timers.h
+++ /dev/null
@@ -1,48 +0,0 @@
-#ifndef BENCHMARK_TIMERS_H
-#define BENCHMARK_TIMERS_H
-
-#include <chrono>
-#include <string>
-
-namespace benchmark {
-
-// Return the CPU usage of the current process
-double ProcessCPUUsage();
-
-// Return the CPU usage of the children of the current process
-double ChildrenCPUUsage();
-
-// Return the CPU usage of the current thread
-double ThreadCPUUsage();
-
-#if defined(HAVE_STEADY_CLOCK)
-template <bool HighResIsSteady = std::chrono::high_resolution_clock::is_steady>
-struct ChooseSteadyClock {
-  typedef std::chrono::high_resolution_clock type;
-};
-
-template <>
-struct ChooseSteadyClock<false> {
-  typedef std::chrono::steady_clock type;
-};
-#endif
-
-struct ChooseClockType {
-#if defined(HAVE_STEADY_CLOCK)
-  typedef ChooseSteadyClock<>::type type;
-#else
-  typedef std::chrono::high_resolution_clock type;
-#endif
-};
-
-inline double ChronoClockNow() {
-  typedef ChooseClockType::type ClockType;
-  using FpSeconds = std::chrono::duration<double, std::chrono::seconds::period>;
-  return FpSeconds(ClockType::now().time_since_epoch()).count();
-}
-
-std::string LocalDateTimeString();
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_TIMERS_H
diff --git a/3rdparty/benchmark/test/AssemblyTests.cmake b/3rdparty/benchmark/test/AssemblyTests.cmake
deleted file mode 100644
index 3d078586..00000000
--- a/3rdparty/benchmark/test/AssemblyTests.cmake
+++ /dev/null
@@ -1,46 +0,0 @@
-
-include(split_list)
-
-set(ASM_TEST_FLAGS "")
-check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
-if (BENCHMARK_HAS_O3_FLAG)
-  list(APPEND ASM_TEST_FLAGS -O3)
-endif()
-
-check_cxx_compiler_flag(-g0 BENCHMARK_HAS_G0_FLAG)
-if (BENCHMARK_HAS_G0_FLAG)
-  list(APPEND ASM_TEST_FLAGS -g0)
-endif()
-
-check_cxx_compiler_flag(-fno-stack-protector BENCHMARK_HAS_FNO_STACK_PROTECTOR_FLAG)
-if (BENCHMARK_HAS_FNO_STACK_PROTECTOR_FLAG)
-  list(APPEND ASM_TEST_FLAGS -fno-stack-protector)
-endif()
-
-split_list(ASM_TEST_FLAGS)
-string(TOUPPER "${CMAKE_CXX_COMPILER_ID}" ASM_TEST_COMPILER)
-
-macro(add_filecheck_test name)
-  cmake_parse_arguments(ARG "" "" "CHECK_PREFIXES" ${ARGV})
-  add_library(${name} OBJECT ${name}.cc)
-  set_target_properties(${name} PROPERTIES COMPILE_FLAGS "-S ${ASM_TEST_FLAGS}")
-  set(ASM_OUTPUT_FILE "${CMAKE_CURRENT_BINARY_DIR}/${name}.s")
-  add_custom_target(copy_${name} ALL
-      COMMAND ${PROJECT_SOURCE_DIR}/tools/strip_asm.py
-        $<TARGET_OBJECTS:${name}>
-        ${ASM_OUTPUT_FILE}
-      BYPRODUCTS ${ASM_OUTPUT_FILE})
-  add_dependencies(copy_${name} ${name})
-  if (NOT ARG_CHECK_PREFIXES)
-    set(ARG_CHECK_PREFIXES "CHECK")
-  endif()
-  foreach(prefix ${ARG_CHECK_PREFIXES})
-    add_test(NAME run_${name}_${prefix}
-        COMMAND
-          ${LLVM_FILECHECK_EXE} ${name}.cc
-          --input-file=${ASM_OUTPUT_FILE}
-          --check-prefixes=CHECK,CHECK-${ASM_TEST_COMPILER}
-        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
-  endforeach()
-endmacro()
-
diff --git a/3rdparty/benchmark/test/BUILD b/3rdparty/benchmark/test/BUILD
deleted file mode 100644
index df700a7a..00000000
--- a/3rdparty/benchmark/test/BUILD
+++ /dev/null
@@ -1,75 +0,0 @@
-TEST_COPTS = [
-    "-pedantic",
-    "-pedantic-errors",
-    "-std=c++11",
-    "-Wall",
-    "-Wextra",
-    "-Wshadow",
-    #    "-Wshorten-64-to-32",
-    "-Wfloat-equal",
-    "-fstrict-aliasing",
-]
-
-PER_SRC_COPTS = ({
-    "cxx03_test.cc": ["-std=c++03"],
-    # Some of the issues with DoNotOptimize only occur when optimization is enabled
-    "donotoptimize_test.cc": ["-O3"],
-})
-
-TEST_ARGS = ["--benchmark_min_time=0.01"]
-
-PER_SRC_TEST_ARGS = ({
-    "user_counters_tabular_test.cc": ["--benchmark_counters_tabular=true"],
-    "repetitions_test.cc": [" --benchmark_repetitions=3"],
-    "spec_arg_test.cc" : ["--benchmark_filter=BM_NotChosen"],
-})
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-
-cc_library(
-    name = "output_test_helper",
-    testonly = 1,
-    srcs = ["output_test_helper.cc"],
-    hdrs = ["output_test.h"],
-    copts = TEST_COPTS,
-    deps = [
-        "//:benchmark",
-        "//:benchmark_internal_headers",
-    ],
-)
-
-[
-    cc_test(
-        name = test_src[:-len(".cc")],
-        size = "small",
-        srcs = [test_src],
-        args = TEST_ARGS + PER_SRC_TEST_ARGS.get(test_src, []),
-        copts = TEST_COPTS + PER_SRC_COPTS.get(test_src, []),
-        deps = [
-            ":output_test_helper",
-            "//:benchmark",
-            "//:benchmark_internal_headers",
-            "@com_google_googletest//:gtest",
-        ] + (
-            ["@com_google_googletest//:gtest_main"] if (test_src[-len("gtest.cc"):] == "gtest.cc") else []
-        ),
-        # FIXME: Add support for assembly tests to bazel.
-        # See Issue #556
-        # https://github.com/google/benchmark/issues/556
-    )
-    for test_src in glob(
-        ["*test.cc"],
-        exclude = [
-            "*_assembly_test.cc",
-            "link_main_test.cc",
-        ],
-    )
-]
-
-cc_test(
-    name = "link_main_test",
-    size = "small",
-    srcs = ["link_main_test.cc"],
-    copts = TEST_COPTS,
-    deps = ["//:benchmark_main"],
-)
diff --git a/3rdparty/benchmark/test/CMakeLists.txt b/3rdparty/benchmark/test/CMakeLists.txt
deleted file mode 100644
index 162af53f..00000000
--- a/3rdparty/benchmark/test/CMakeLists.txt
+++ /dev/null
@@ -1,277 +0,0 @@
-# Enable the tests
-
-find_package(Threads REQUIRED)
-include(CheckCXXCompilerFlag)
-
-# NOTE: Some tests use `<cassert>` to perform the test. Therefore we must
-# strip -DNDEBUG from the default CMake flags in DEBUG mode.
-string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
-if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
-  add_definitions( -UNDEBUG )
-  add_definitions(-DTEST_BENCHMARK_LIBRARY_HAS_NO_ASSERTIONS)
-  # Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
-  foreach (flags_var_to_scrub
-      CMAKE_CXX_FLAGS_RELEASE
-      CMAKE_CXX_FLAGS_RELWITHDEBINFO
-      CMAKE_CXX_FLAGS_MINSIZEREL
-      CMAKE_C_FLAGS_RELEASE
-      CMAKE_C_FLAGS_RELWITHDEBINFO
-      CMAKE_C_FLAGS_MINSIZEREL)
-    string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " "
-      "${flags_var_to_scrub}" "${${flags_var_to_scrub}}")
-  endforeach()
-endif()
-
-check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
-set(BENCHMARK_O3_FLAG "")
-if (BENCHMARK_HAS_O3_FLAG)
-  set(BENCHMARK_O3_FLAG "-O3")
-endif()
-
-# NOTE: These flags must be added after find_package(Threads REQUIRED) otherwise
-# they will break the configuration check.
-if (DEFINED BENCHMARK_CXX_LINKER_FLAGS)
-  list(APPEND CMAKE_EXE_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
-endif()
-
-add_library(output_test_helper STATIC output_test_helper.cc output_test.h)
-
-macro(compile_benchmark_test name)
-  add_executable(${name} "${name}.cc")
-  target_link_libraries(${name} benchmark::benchmark ${CMAKE_THREAD_LIBS_INIT})
-endmacro(compile_benchmark_test)
-
-macro(compile_benchmark_test_with_main name)
-  add_executable(${name} "${name}.cc")
-  target_link_libraries(${name} benchmark::benchmark_main)
-endmacro(compile_benchmark_test_with_main)
-
-macro(compile_output_test name)
-  add_executable(${name} "${name}.cc" output_test.h)
-  target_link_libraries(${name} output_test_helper benchmark::benchmark
-          ${BENCHMARK_CXX_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
-endmacro(compile_output_test)
-
-# Demonstration executable
-compile_benchmark_test(benchmark_test)
-add_test(NAME benchmark COMMAND benchmark_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(spec_arg_test)
-add_test(NAME spec_arg COMMAND spec_arg_test --benchmark_filter=BM_NotChosen)
-
-compile_benchmark_test(benchmark_setup_teardown_test)
-add_test(NAME benchmark_setup_teardown COMMAND benchmark_setup_teardown_test)
-
-compile_benchmark_test(filter_test)
-macro(add_filter_test name filter expect)
-  add_test(NAME ${name} COMMAND filter_test --benchmark_min_time=0.01 --benchmark_filter=${filter} ${expect})
-  add_test(NAME ${name}_list_only COMMAND filter_test --benchmark_list_tests --benchmark_filter=${filter} ${expect})
-endmacro(add_filter_test)
-
-add_filter_test(filter_simple "Foo" 3)
-add_filter_test(filter_simple_negative "-Foo" 2)
-add_filter_test(filter_suffix "BM_.*" 4)
-add_filter_test(filter_suffix_negative "-BM_.*" 1)
-add_filter_test(filter_regex_all ".*" 5)
-add_filter_test(filter_regex_all_negative "-.*" 0)
-add_filter_test(filter_regex_blank "" 5)
-add_filter_test(filter_regex_blank_negative "-" 0)
-add_filter_test(filter_regex_none "monkey" 0)
-add_filter_test(filter_regex_none_negative "-monkey" 5)
-add_filter_test(filter_regex_wildcard ".*Foo.*" 3)
-add_filter_test(filter_regex_wildcard_negative "-.*Foo.*" 2)
-add_filter_test(filter_regex_begin "^BM_.*" 4)
-add_filter_test(filter_regex_begin_negative "-^BM_.*" 1)
-add_filter_test(filter_regex_begin2 "^N" 1)
-add_filter_test(filter_regex_begin2_negative "-^N" 4)
-add_filter_test(filter_regex_end ".*Ba$" 1)
-add_filter_test(filter_regex_end_negative "-.*Ba$" 4)
-
-compile_benchmark_test(options_test)
-add_test(NAME options_benchmarks COMMAND options_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(basic_test)
-add_test(NAME basic_benchmark COMMAND basic_test --benchmark_min_time=0.01)
-
-compile_output_test(repetitions_test)
-add_test(NAME repetitions_benchmark COMMAND repetitions_test --benchmark_min_time=0.01 --benchmark_repetitions=3)
-
-compile_benchmark_test(diagnostics_test)
-add_test(NAME diagnostics_test COMMAND diagnostics_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(skip_with_error_test)
-add_test(NAME skip_with_error_test COMMAND skip_with_error_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(donotoptimize_test)
-# Some of the issues with DoNotOptimize only occur when optimization is enabled
-check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
-if (BENCHMARK_HAS_O3_FLAG)
-  set_target_properties(donotoptimize_test PROPERTIES COMPILE_FLAGS "-O3")
-endif()
-add_test(NAME donotoptimize_test COMMAND donotoptimize_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(fixture_test)
-add_test(NAME fixture_test COMMAND fixture_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(register_benchmark_test)
-add_test(NAME register_benchmark_test COMMAND register_benchmark_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(map_test)
-add_test(NAME map_test COMMAND map_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(multiple_ranges_test)
-add_test(NAME multiple_ranges_test COMMAND multiple_ranges_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(args_product_test)
-add_test(NAME args_product_test COMMAND args_product_test --benchmark_min_time=0.01)
-
-compile_benchmark_test_with_main(link_main_test)
-add_test(NAME link_main_test COMMAND link_main_test --benchmark_min_time=0.01)
-
-compile_output_test(reporter_output_test)
-add_test(NAME reporter_output_test COMMAND reporter_output_test --benchmark_min_time=0.01)
-
-compile_output_test(templated_fixture_test)
-add_test(NAME templated_fixture_test COMMAND templated_fixture_test --benchmark_min_time=0.01)
-
-compile_output_test(user_counters_test)
-add_test(NAME user_counters_test COMMAND user_counters_test --benchmark_min_time=0.01)
-
-compile_output_test(perf_counters_test)
-add_test(NAME perf_counters_test COMMAND perf_counters_test --benchmark_min_time=0.01 --benchmark_perf_counters=CYCLES,BRANCHES)
-
-compile_output_test(internal_threading_test)
-add_test(NAME internal_threading_test COMMAND internal_threading_test --benchmark_min_time=0.01)
-
-compile_output_test(report_aggregates_only_test)
-add_test(NAME report_aggregates_only_test COMMAND report_aggregates_only_test --benchmark_min_time=0.01)
-
-compile_output_test(display_aggregates_only_test)
-add_test(NAME display_aggregates_only_test COMMAND display_aggregates_only_test --benchmark_min_time=0.01)
-
-compile_output_test(user_counters_tabular_test)
-add_test(NAME user_counters_tabular_test COMMAND user_counters_tabular_test --benchmark_counters_tabular=true --benchmark_min_time=0.01)
-
-compile_output_test(user_counters_thousands_test)
-add_test(NAME user_counters_thousands_test COMMAND user_counters_thousands_test --benchmark_min_time=0.01)
-
-compile_output_test(memory_manager_test)
-add_test(NAME memory_manager_test COMMAND memory_manager_test --benchmark_min_time=0.01)
-
-check_cxx_compiler_flag(-std=c++03 BENCHMARK_HAS_CXX03_FLAG)
-if (BENCHMARK_HAS_CXX03_FLAG)
-  compile_benchmark_test(cxx03_test)
-  set_target_properties(cxx03_test
-      PROPERTIES
-      CXX_STANDARD 98
-      CXX_STANDARD_REQUIRED YES)
-  # libstdc++ provides different definitions within <map> between dialects. When
-  # LTO is enabled and -Werror is specified GCC diagnoses this ODR violation
-  # causing the test to fail to compile. To prevent this we explicitly disable
-  # the warning.
-  check_cxx_compiler_flag(-Wno-odr BENCHMARK_HAS_WNO_ODR)
-  if (BENCHMARK_ENABLE_LTO AND BENCHMARK_HAS_WNO_ODR)
-    set_target_properties(cxx03_test
-        PROPERTIES
-        LINK_FLAGS "-Wno-odr")
-  endif()
-  add_test(NAME cxx03 COMMAND cxx03_test --benchmark_min_time=0.01)
-endif()
-
-# Attempt to work around flaky test failures when running on Appveyor servers.
-if (DEFINED ENV{APPVEYOR})
-  set(COMPLEXITY_MIN_TIME "0.5")
-else()
-  set(COMPLEXITY_MIN_TIME "0.01")
-endif()
-compile_output_test(complexity_test)
-add_test(NAME complexity_benchmark COMMAND complexity_test --benchmark_min_time=${COMPLEXITY_MIN_TIME})
-
-###############################################################################
-# GoogleTest Unit Tests
-###############################################################################
-
-if (BENCHMARK_ENABLE_GTEST_TESTS)
-  macro(compile_gtest name)
-    add_executable(${name} "${name}.cc")
-    target_link_libraries(${name} benchmark::benchmark
-        gmock_main ${CMAKE_THREAD_LIBS_INIT})
-  endmacro(compile_gtest)
-
-  macro(add_gtest name)
-    compile_gtest(${name})
-    add_test(NAME ${name} COMMAND ${name})
-  endmacro()
-
-  add_gtest(benchmark_gtest)
-  add_gtest(benchmark_name_gtest)
-  add_gtest(benchmark_random_interleaving_gtest)
-  add_gtest(commandlineflags_gtest)
-  add_gtest(statistics_gtest)
-  add_gtest(string_util_gtest)
-  add_gtest(perf_counters_gtest)
-endif(BENCHMARK_ENABLE_GTEST_TESTS)
-
-###############################################################################
-# Assembly Unit Tests
-###############################################################################
-
-if (BENCHMARK_ENABLE_ASSEMBLY_TESTS)
-  if (NOT LLVM_FILECHECK_EXE)
-    message(FATAL_ERROR "LLVM FileCheck is required when including this file")
-  endif()
-  include(AssemblyTests.cmake)
-  add_filecheck_test(donotoptimize_assembly_test)
-  add_filecheck_test(state_assembly_test)
-  add_filecheck_test(clobber_memory_assembly_test)
-endif()
-
-
-
-###############################################################################
-# Code Coverage Configuration
-###############################################################################
-
-# Add the coverage command(s)
-if(CMAKE_BUILD_TYPE)
-  string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
-endif()
-if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage")
-  find_program(GCOV gcov)
-  find_program(LCOV lcov)
-  find_program(GENHTML genhtml)
-  find_program(CTEST ctest)
-  if (GCOV AND LCOV AND GENHTML AND CTEST AND HAVE_CXX_FLAG_COVERAGE)
-    add_custom_command(
-      OUTPUT ${CMAKE_BINARY_DIR}/lcov/index.html
-      COMMAND ${LCOV} -q -z -d .
-      COMMAND ${LCOV} -q --no-external -c -b "${CMAKE_SOURCE_DIR}" -d . -o before.lcov -i
-      COMMAND ${CTEST} --force-new-ctest-process
-      COMMAND ${LCOV} -q --no-external -c -b "${CMAKE_SOURCE_DIR}" -d . -o after.lcov
-      COMMAND ${LCOV} -q -a before.lcov -a after.lcov --output-file final.lcov
-      COMMAND ${LCOV} -q -r final.lcov "'${CMAKE_SOURCE_DIR}/test/*'" -o final.lcov
-      COMMAND ${GENHTML} final.lcov -o lcov --demangle-cpp --sort -p "${CMAKE_BINARY_DIR}" -t benchmark
-      DEPENDS filter_test benchmark_test options_test basic_test fixture_test cxx03_test complexity_test
-      WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
-      COMMENT "Running LCOV"
-    )
-    add_custom_target(coverage
-      DEPENDS ${CMAKE_BINARY_DIR}/lcov/index.html
-      COMMENT "LCOV report at lcov/index.html"
-    )
-    message(STATUS "Coverage command added")
-  else()
-    if (HAVE_CXX_FLAG_COVERAGE)
-      set(CXX_FLAG_COVERAGE_MESSAGE supported)
-    else()
-      set(CXX_FLAG_COVERAGE_MESSAGE unavailable)
-    endif()
-    message(WARNING
-      "Coverage not available:\n"
-      "  gcov: ${GCOV}\n"
-      "  lcov: ${LCOV}\n"
-      "  genhtml: ${GENHTML}\n"
-      "  ctest: ${CTEST}\n"
-      "  --coverage flag: ${CXX_FLAG_COVERAGE_MESSAGE}")
-  endif()
-endif()
diff --git a/3rdparty/benchmark/test/args_product_test.cc b/3rdparty/benchmark/test/args_product_test.cc
deleted file mode 100644
index d44f391f..00000000
--- a/3rdparty/benchmark/test/args_product_test.cc
+++ /dev/null
@@ -1,77 +0,0 @@
-#include <cassert>
-#include <iostream>
-#include <set>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-
-class ArgsProductFixture : public ::benchmark::Fixture {
- public:
-  ArgsProductFixture()
-      : expectedValues({{0, 100, 2000, 30000},
-                        {1, 15, 3, 8},
-                        {1, 15, 3, 9},
-                        {1, 15, 7, 8},
-                        {1, 15, 7, 9},
-                        {1, 15, 10, 8},
-                        {1, 15, 10, 9},
-                        {2, 15, 3, 8},
-                        {2, 15, 3, 9},
-                        {2, 15, 7, 8},
-                        {2, 15, 7, 9},
-                        {2, 15, 10, 8},
-                        {2, 15, 10, 9},
-                        {4, 5, 6, 11}}) {}
-
-  void SetUp(const ::benchmark::State& state) BENCHMARK_OVERRIDE {
-    std::vector<int64_t> ranges = {state.range(0), state.range(1),
-                                   state.range(2), state.range(3)};
-
-    assert(expectedValues.find(ranges) != expectedValues.end());
-
-    actualValues.insert(ranges);
-  }
-
-  // NOTE: This is not TearDown as we want to check after _all_ runs are
-  // complete.
-  virtual ~ArgsProductFixture() {
-    if (actualValues != expectedValues) {
-      std::cout << "EXPECTED\n";
-      for (const auto& v : expectedValues) {
-        std::cout << "{";
-        for (int64_t iv : v) {
-          std::cout << iv << ", ";
-        }
-        std::cout << "}\n";
-      }
-      std::cout << "ACTUAL\n";
-      for (const auto& v : actualValues) {
-        std::cout << "{";
-        for (int64_t iv : v) {
-          std::cout << iv << ", ";
-        }
-        std::cout << "}\n";
-      }
-    }
-  }
-
-  std::set<std::vector<int64_t>> expectedValues;
-  std::set<std::vector<int64_t>> actualValues;
-};
-
-BENCHMARK_DEFINE_F(ArgsProductFixture, Empty)(benchmark::State& state) {
-  for (auto _ : state) {
-    int64_t product =
-        state.range(0) * state.range(1) * state.range(2) * state.range(3);
-    for (int64_t x = 0; x < product; x++) {
-      benchmark::DoNotOptimize(x);
-    }
-  }
-}
-
-BENCHMARK_REGISTER_F(ArgsProductFixture, Empty)
-    ->Args({0, 100, 2000, 30000})
-    ->ArgsProduct({{1, 2}, {15}, {3, 7, 10}, {8, 9}})
-    ->Args({4, 5, 6, 11});
-
-BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/basic_test.cc b/3rdparty/benchmark/test/basic_test.cc
deleted file mode 100644
index 3a8fd42a..00000000
--- a/3rdparty/benchmark/test/basic_test.cc
+++ /dev/null
@@ -1,179 +0,0 @@
-
-#include "benchmark/benchmark.h"
-
-#define BASIC_BENCHMARK_TEST(x) BENCHMARK(x)->Arg(8)->Arg(512)->Arg(8192)
-
-void BM_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-}
-BENCHMARK(BM_empty);
-BENCHMARK(BM_empty)->ThreadPerCpu();
-
-void BM_spin_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    for (auto x = 0; x < state.range(0); ++x) {
-      benchmark::DoNotOptimize(x);
-    }
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_empty);
-BASIC_BENCHMARK_TEST(BM_spin_empty)->ThreadPerCpu();
-
-void BM_spin_pause_before(benchmark::State& state) {
-  for (auto i = 0; i < state.range(0); ++i) {
-    benchmark::DoNotOptimize(i);
-  }
-  for (auto _ : state) {
-    for (auto i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_pause_before);
-BASIC_BENCHMARK_TEST(BM_spin_pause_before)->ThreadPerCpu();
-
-void BM_spin_pause_during(benchmark::State& state) {
-  for (auto _ : state) {
-    state.PauseTiming();
-    for (auto i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-    state.ResumeTiming();
-    for (auto i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_pause_during);
-BASIC_BENCHMARK_TEST(BM_spin_pause_during)->ThreadPerCpu();
-
-void BM_pause_during(benchmark::State& state) {
-  for (auto _ : state) {
-    state.PauseTiming();
-    state.ResumeTiming();
-  }
-}
-BENCHMARK(BM_pause_during);
-BENCHMARK(BM_pause_during)->ThreadPerCpu();
-BENCHMARK(BM_pause_during)->UseRealTime();
-BENCHMARK(BM_pause_during)->UseRealTime()->ThreadPerCpu();
-
-void BM_spin_pause_after(benchmark::State& state) {
-  for (auto _ : state) {
-    for (auto i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-  }
-  for (auto i = 0; i < state.range(0); ++i) {
-    benchmark::DoNotOptimize(i);
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_pause_after);
-BASIC_BENCHMARK_TEST(BM_spin_pause_after)->ThreadPerCpu();
-
-void BM_spin_pause_before_and_after(benchmark::State& state) {
-  for (auto i = 0; i < state.range(0); ++i) {
-    benchmark::DoNotOptimize(i);
-  }
-  for (auto _ : state) {
-    for (auto i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-  }
-  for (auto i = 0; i < state.range(0); ++i) {
-    benchmark::DoNotOptimize(i);
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_pause_before_and_after);
-BASIC_BENCHMARK_TEST(BM_spin_pause_before_and_after)->ThreadPerCpu();
-
-void BM_empty_stop_start(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_empty_stop_start);
-BENCHMARK(BM_empty_stop_start)->ThreadPerCpu();
-
-void BM_KeepRunning(benchmark::State& state) {
-  benchmark::IterationCount iter_count = 0;
-  assert(iter_count == state.iterations());
-  while (state.KeepRunning()) {
-    ++iter_count;
-  }
-  assert(iter_count == state.iterations());
-}
-BENCHMARK(BM_KeepRunning);
-
-void BM_KeepRunningBatch(benchmark::State& state) {
-  // Choose a batch size >1000 to skip the typical runs with iteration
-  // targets of 10, 100 and 1000.  If these are not actually skipped the
-  // bug would be detectable as consecutive runs with the same iteration
-  // count.  Below we assert that this does not happen.
-  const benchmark::IterationCount batch_size = 1009;
-
-  static benchmark::IterationCount prior_iter_count = 0;
-  benchmark::IterationCount iter_count = 0;
-  while (state.KeepRunningBatch(batch_size)) {
-    iter_count += batch_size;
-  }
-  assert(state.iterations() == iter_count);
-
-  // Verify that the iteration count always increases across runs (see
-  // comment above).
-  assert(iter_count == batch_size            // max_iterations == 1
-         || iter_count > prior_iter_count);  // max_iterations > batch_size
-  prior_iter_count = iter_count;
-}
-// Register with a fixed repetition count to establish the invariant that
-// the iteration count should always change across runs.  This overrides
-// the --benchmark_repetitions command line flag, which would otherwise
-// cause this test to fail if set > 1.
-BENCHMARK(BM_KeepRunningBatch)->Repetitions(1);
-
-void BM_RangedFor(benchmark::State& state) {
-  benchmark::IterationCount iter_count = 0;
-  for (auto _ : state) {
-    ++iter_count;
-  }
-  assert(iter_count == state.max_iterations);
-}
-BENCHMARK(BM_RangedFor);
-
-#ifdef BENCHMARK_HAS_CXX11
-template <typename T>
-void BM_OneTemplateFunc(benchmark::State& state) {
-  auto arg = state.range(0);
-  T sum = 0;
-  for (auto _ : state) {
-    sum += arg;
-  }
-}
-BENCHMARK(BM_OneTemplateFunc<int>)->Arg(1);
-BENCHMARK(BM_OneTemplateFunc<double>)->Arg(1);
-
-template <typename A, typename B>
-void BM_TwoTemplateFunc(benchmark::State& state) {
-  auto arg = state.range(0);
-  A sum = 0;
-  B prod = 1;
-  for (auto _ : state) {
-    sum += arg;
-    prod *= arg;
-  }
-}
-BENCHMARK(BM_TwoTemplateFunc<int, double>)->Arg(1);
-BENCHMARK(BM_TwoTemplateFunc<double, int>)->Arg(1);
-
-#endif  // BENCHMARK_HAS_CXX11
-
-// Ensure that StateIterator provides all the necessary typedefs required to
-// instantiate std::iterator_traits.
-static_assert(
-    std::is_same<typename std::iterator_traits<
-                     benchmark::State::StateIterator>::value_type,
-                 typename benchmark::State::StateIterator::value_type>::value,
-    "");
-
-BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/benchmark_gtest.cc b/3rdparty/benchmark/test/benchmark_gtest.cc
deleted file mode 100644
index 14a885ba..00000000
--- a/3rdparty/benchmark/test/benchmark_gtest.cc
+++ /dev/null
@@ -1,165 +0,0 @@
-#include <map>
-#include <string>
-#include <vector>
-
-#include "../src/benchmark_register.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace benchmark {
-namespace internal {
-extern std::map<std::string, std::string>* global_context;
-
-namespace {
-
-TEST(AddRangeTest, Simple) {
-  std::vector<int> dst;
-  AddRange(&dst, 1, 2, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(1, 2));
-}
-
-TEST(AddRangeTest, Simple64) {
-  std::vector<int64_t> dst;
-  AddRange(&dst, static_cast<int64_t>(1), static_cast<int64_t>(2), 2);
-  EXPECT_THAT(dst, testing::ElementsAre(1, 2));
-}
-
-TEST(AddRangeTest, Advanced) {
-  std::vector<int> dst;
-  AddRange(&dst, 5, 15, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(5, 8, 15));
-}
-
-TEST(AddRangeTest, Advanced64) {
-  std::vector<int64_t> dst;
-  AddRange(&dst, static_cast<int64_t>(5), static_cast<int64_t>(15), 2);
-  EXPECT_THAT(dst, testing::ElementsAre(5, 8, 15));
-}
-
-TEST(AddRangeTest, FullRange8) {
-  std::vector<int8_t> dst;
-  AddRange(&dst, int8_t{1}, std::numeric_limits<int8_t>::max(), 8);
-  EXPECT_THAT(dst, testing::ElementsAre(1, 8, 64, 127));
-}
-
-TEST(AddRangeTest, FullRange64) {
-  std::vector<int64_t> dst;
-  AddRange(&dst, int64_t{1}, std::numeric_limits<int64_t>::max(), 1024);
-  EXPECT_THAT(
-      dst, testing::ElementsAre(1LL, 1024LL, 1048576LL, 1073741824LL,
-                                1099511627776LL, 1125899906842624LL,
-                                1152921504606846976LL, 9223372036854775807LL));
-}
-
-TEST(AddRangeTest, NegativeRanges) {
-  std::vector<int> dst;
-  AddRange(&dst, -8, 0, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(-8, -4, -2, -1, 0));
-}
-
-TEST(AddRangeTest, StrictlyNegative) {
-  std::vector<int> dst;
-  AddRange(&dst, -8, -1, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(-8, -4, -2, -1));
-}
-
-TEST(AddRangeTest, SymmetricNegativeRanges) {
-  std::vector<int> dst;
-  AddRange(&dst, -8, 8, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(-8, -4, -2, -1, 0, 1, 2, 4, 8));
-}
-
-TEST(AddRangeTest, SymmetricNegativeRangesOddMult) {
-  std::vector<int> dst;
-  AddRange(&dst, -30, 32, 5);
-  EXPECT_THAT(dst, testing::ElementsAre(-30, -25, -5, -1, 0, 1, 5, 25, 32));
-}
-
-TEST(AddRangeTest, NegativeRangesAsymmetric) {
-  std::vector<int> dst;
-  AddRange(&dst, -3, 5, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(-3, -2, -1, 0, 1, 2, 4, 5));
-}
-
-TEST(AddRangeTest, NegativeRangesLargeStep) {
-  // Always include -1, 0, 1 when crossing zero.
-  std::vector<int> dst;
-  AddRange(&dst, -8, 8, 10);
-  EXPECT_THAT(dst, testing::ElementsAre(-8, -1, 0, 1, 8));
-}
-
-TEST(AddRangeTest, ZeroOnlyRange) {
-  std::vector<int> dst;
-  AddRange(&dst, 0, 0, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(0));
-}
-
-TEST(AddRangeTest, ZeroStartingRange) {
-  std::vector<int> dst;
-  AddRange(&dst, 0, 2, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(0, 1, 2));
-}
-
-TEST(AddRangeTest, NegativeRange64) {
-  std::vector<int64_t> dst;
-  AddRange<int64_t>(&dst, -4, 4, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(-4, -2, -1, 0, 1, 2, 4));
-}
-
-TEST(AddRangeTest, NegativeRangePreservesExistingOrder) {
-  // If elements already exist in the range, ensure we don't change
-  // their ordering by adding negative values.
-  std::vector<int64_t> dst = {1, 2, 3};
-  AddRange<int64_t>(&dst, -2, 2, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(1, 2, 3, -2, -1, 0, 1, 2));
-}
-
-TEST(AddRangeTest, FullNegativeRange64) {
-  std::vector<int64_t> dst;
-  const auto min = std::numeric_limits<int64_t>::min();
-  const auto max = std::numeric_limits<int64_t>::max();
-  AddRange(&dst, min, max, 1024);
-  EXPECT_THAT(
-      dst, testing::ElementsAreArray(std::vector<int64_t>{
-               min, -1152921504606846976LL, -1125899906842624LL,
-               -1099511627776LL, -1073741824LL, -1048576LL, -1024LL, -1LL, 0LL,
-               1LL, 1024LL, 1048576LL, 1073741824LL, 1099511627776LL,
-               1125899906842624LL, 1152921504606846976LL, max}));
-}
-
-TEST(AddRangeTest, Simple8) {
-  std::vector<int8_t> dst;
-  AddRange<int8_t>(&dst, 1, 8, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(1, 2, 4, 8));
-}
-
-TEST(AddCustomContext, Simple) {
-  EXPECT_THAT(global_context, nullptr);
-
-  AddCustomContext("foo", "bar");
-  AddCustomContext("baz", "qux");
-
-  EXPECT_THAT(*global_context,
-              testing::UnorderedElementsAre(testing::Pair("foo", "bar"),
-                                            testing::Pair("baz", "qux")));
-
-  delete global_context;
-  global_context = nullptr;
-}
-
-TEST(AddCustomContext, DuplicateKey) {
-  EXPECT_THAT(global_context, nullptr);
-
-  AddCustomContext("foo", "bar");
-  AddCustomContext("foo", "qux");
-
-  EXPECT_THAT(*global_context,
-              testing::UnorderedElementsAre(testing::Pair("foo", "bar")));
-
-  delete global_context;
-  global_context = nullptr;
-}
-
-}  // namespace
-}  // namespace internal
-}  // namespace benchmark
diff --git a/3rdparty/benchmark/test/benchmark_name_gtest.cc b/3rdparty/benchmark/test/benchmark_name_gtest.cc
deleted file mode 100644
index afb401c1..00000000
--- a/3rdparty/benchmark/test/benchmark_name_gtest.cc
+++ /dev/null
@@ -1,74 +0,0 @@
-#include "benchmark/benchmark.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-using namespace benchmark;
-using namespace benchmark::internal;
-
-TEST(BenchmarkNameTest, Empty) {
-  const auto name = BenchmarkName();
-  EXPECT_EQ(name.str(), std::string());
-}
-
-TEST(BenchmarkNameTest, FunctionName) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  EXPECT_EQ(name.str(), "function_name");
-}
-
-TEST(BenchmarkNameTest, FunctionNameAndArgs) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  name.args = "some_args:3/4/5";
-  EXPECT_EQ(name.str(), "function_name/some_args:3/4/5");
-}
-
-TEST(BenchmarkNameTest, MinTime) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  name.args = "some_args:3/4";
-  name.min_time = "min_time:3.4s";
-  EXPECT_EQ(name.str(), "function_name/some_args:3/4/min_time:3.4s");
-}
-
-TEST(BenchmarkNameTest, Iterations) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  name.min_time = "min_time:3.4s";
-  name.iterations = "iterations:42";
-  EXPECT_EQ(name.str(), "function_name/min_time:3.4s/iterations:42");
-}
-
-TEST(BenchmarkNameTest, Repetitions) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  name.min_time = "min_time:3.4s";
-  name.repetitions = "repetitions:24";
-  EXPECT_EQ(name.str(), "function_name/min_time:3.4s/repetitions:24");
-}
-
-TEST(BenchmarkNameTest, TimeType) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  name.min_time = "min_time:3.4s";
-  name.time_type = "hammer_time";
-  EXPECT_EQ(name.str(), "function_name/min_time:3.4s/hammer_time");
-}
-
-TEST(BenchmarkNameTest, Threads) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  name.min_time = "min_time:3.4s";
-  name.threads = "threads:256";
-  EXPECT_EQ(name.str(), "function_name/min_time:3.4s/threads:256");
-}
-
-TEST(BenchmarkNameTest, TestEmptyFunctionName) {
-  auto name = BenchmarkName();
-  name.args = "first:3/second:4";
-  name.threads = "threads:22";
-  EXPECT_EQ(name.str(), "first:3/second:4/threads:22");
-}
-
-}  // end namespace
diff --git a/3rdparty/benchmark/test/benchmark_random_interleaving_gtest.cc b/3rdparty/benchmark/test/benchmark_random_interleaving_gtest.cc
deleted file mode 100644
index d04befa8..00000000
--- a/3rdparty/benchmark/test/benchmark_random_interleaving_gtest.cc
+++ /dev/null
@@ -1,127 +0,0 @@
-#include <queue>
-#include <string>
-#include <vector>
-
-#include "../src/commandlineflags.h"
-#include "../src/string_util.h"
-#include "benchmark/benchmark.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace benchmark {
-
-BM_DECLARE_bool(benchmark_enable_random_interleaving);
-BM_DECLARE_string(benchmark_filter);
-BM_DECLARE_int32(benchmark_repetitions);
-
-namespace internal {
-namespace {
-
-class EventQueue : public std::queue<std::string> {
- public:
-  void Put(const std::string& event) { push(event); }
-
-  void Clear() {
-    while (!empty()) {
-      pop();
-    }
-  }
-
-  std::string Get() {
-    std::string event = front();
-    pop();
-    return event;
-  }
-};
-
-EventQueue* queue = new EventQueue();
-
-class NullReporter : public BenchmarkReporter {
- public:
-  bool ReportContext(const Context& /*context*/) override { return true; }
-  void ReportRuns(const std::vector<Run>& /* report */) override {}
-};
-
-class BenchmarkTest : public testing::Test {
- public:
-  static void SetupHook(int /* num_threads */) { queue->push("Setup"); }
-
-  static void TeardownHook(int /* num_threads */) { queue->push("Teardown"); }
-
-  void Execute(const std::string& pattern) {
-    queue->Clear();
-
-    BenchmarkReporter* reporter = new NullReporter;
-    FLAGS_benchmark_filter = pattern;
-    RunSpecifiedBenchmarks(reporter);
-    delete reporter;
-
-    queue->Put("DONE");  // End marker
-  }
-};
-
-void BM_Match1(benchmark::State& state) {
-  const int64_t arg = state.range(0);
-
-  for (auto _ : state) {
-  }
-  queue->Put(StrFormat("BM_Match1/%d", static_cast<int>(arg)));
-}
-BENCHMARK(BM_Match1)
-    ->Iterations(100)
-    ->Arg(1)
-    ->Arg(2)
-    ->Arg(3)
-    ->Range(10, 80)
-    ->Args({90})
-    ->Args({100});
-
-TEST_F(BenchmarkTest, Match1) {
-  Execute("BM_Match1");
-  ASSERT_EQ("BM_Match1/1", queue->Get());
-  ASSERT_EQ("BM_Match1/2", queue->Get());
-  ASSERT_EQ("BM_Match1/3", queue->Get());
-  ASSERT_EQ("BM_Match1/10", queue->Get());
-  ASSERT_EQ("BM_Match1/64", queue->Get());
-  ASSERT_EQ("BM_Match1/80", queue->Get());
-  ASSERT_EQ("BM_Match1/90", queue->Get());
-  ASSERT_EQ("BM_Match1/100", queue->Get());
-  ASSERT_EQ("DONE", queue->Get());
-}
-
-TEST_F(BenchmarkTest, Match1WithRepetition) {
-  FLAGS_benchmark_repetitions = 2;
-
-  Execute("BM_Match1/(64|80)");
-  ASSERT_EQ("BM_Match1/64", queue->Get());
-  ASSERT_EQ("BM_Match1/64", queue->Get());
-  ASSERT_EQ("BM_Match1/80", queue->Get());
-  ASSERT_EQ("BM_Match1/80", queue->Get());
-  ASSERT_EQ("DONE", queue->Get());
-}
-
-TEST_F(BenchmarkTest, Match1WithRandomInterleaving) {
-  FLAGS_benchmark_enable_random_interleaving = true;
-  FLAGS_benchmark_repetitions = 100;
-
-  std::map<std::string, int> element_count;
-  std::map<std::string, int> interleaving_count;
-  Execute("BM_Match1/(64|80)");
-  for (int i = 0; i < 100; ++i) {
-    std::vector<std::string> interleaving;
-    interleaving.push_back(queue->Get());
-    interleaving.push_back(queue->Get());
-    element_count[interleaving[0]]++;
-    element_count[interleaving[1]]++;
-    interleaving_count[StrFormat("%s,%s", interleaving[0].c_str(),
-                                 interleaving[1].c_str())]++;
-  }
-  EXPECT_EQ(element_count["BM_Match1/64"], 100) << "Unexpected repetitions.";
-  EXPECT_EQ(element_count["BM_Match1/80"], 100) << "Unexpected repetitions.";
-  EXPECT_GE(interleaving_count.size(), 2) << "Interleaving was not randomized.";
-  ASSERT_EQ("DONE", queue->Get());
-}
-
-}  // namespace
-}  // namespace internal
-}  // namespace benchmark
diff --git a/3rdparty/benchmark/test/benchmark_setup_teardown_test.cc b/3rdparty/benchmark/test/benchmark_setup_teardown_test.cc
deleted file mode 100644
index efa34e15..00000000
--- a/3rdparty/benchmark/test/benchmark_setup_teardown_test.cc
+++ /dev/null
@@ -1,157 +0,0 @@
-#include <atomic>
-#include <cassert>
-#include <cstdlib>
-#include <cstring>
-#include <iostream>
-#include <limits>
-#include <string>
-
-#include "benchmark/benchmark.h"
-
-// Test that Setup() and Teardown() are called exactly once
-// for each benchmark run (single-threaded).
-namespace single {
-static int setup_call = 0;
-static int teardown_call = 0;
-}  // namespace single
-static void DoSetup1(const benchmark::State& state) {
-  ++single::setup_call;
-
-  // Setup/Teardown should never be called with any thread_idx != 0.
-  assert(state.thread_index() == 0);
-}
-
-static void DoTeardown1(const benchmark::State& state) {
-  ++single::teardown_call;
-  assert(state.thread_index() == 0);
-}
-
-static void BM_with_setup(benchmark::State& state) {
-  for (auto s : state) {
-  }
-}
-BENCHMARK(BM_with_setup)
-    ->Arg(1)
-    ->Arg(3)
-    ->Arg(5)
-    ->Arg(7)
-    ->Iterations(100)
-    ->Setup(DoSetup1)
-    ->Teardown(DoTeardown1);
-
-// Test that Setup() and Teardown() are called once for each group of threads.
-namespace concurrent {
-static std::atomic<int> setup_call(0);
-static std::atomic<int> teardown_call(0);
-static std::atomic<int> func_call(0);
-}  // namespace concurrent
-
-static void DoSetup2(const benchmark::State& state) {
-  concurrent::setup_call.fetch_add(1, std::memory_order_acquire);
-  assert(state.thread_index() == 0);
-}
-
-static void DoTeardown2(const benchmark::State& state) {
-  concurrent::teardown_call.fetch_add(1, std::memory_order_acquire);
-  assert(state.thread_index() == 0);
-}
-
-static void BM_concurrent(benchmark::State& state) {
-  for (auto s : state) {
-  }
-  concurrent::func_call.fetch_add(1, std::memory_order_acquire);
-}
-
-BENCHMARK(BM_concurrent)
-    ->Setup(DoSetup2)
-    ->Teardown(DoTeardown2)
-    ->Iterations(100)
-    ->Threads(5)
-    ->Threads(10)
-    ->Threads(15);
-
-// Testing interaction with Fixture::Setup/Teardown
-namespace fixture_interaction {
-int setup = 0;
-int fixture_setup = 0;
-}  // namespace fixture_interaction
-
-#define FIXTURE_BECHMARK_NAME MyFixture
-
-class FIXTURE_BECHMARK_NAME : public ::benchmark::Fixture {
- public:
-  void SetUp(const ::benchmark::State&) BENCHMARK_OVERRIDE {
-    fixture_interaction::fixture_setup++;
-  }
-
-  ~FIXTURE_BECHMARK_NAME() {}
-};
-
-BENCHMARK_F(FIXTURE_BECHMARK_NAME, BM_WithFixture)(benchmark::State& st) {
-  for (auto _ : st) {
-  }
-}
-
-static void DoSetupWithFixture(const benchmark::State&) {
-  fixture_interaction::setup++;
-}
-
-BENCHMARK_REGISTER_F(FIXTURE_BECHMARK_NAME, BM_WithFixture)
-    ->Arg(1)
-    ->Arg(3)
-    ->Arg(5)
-    ->Arg(7)
-    ->Setup(DoSetupWithFixture)
-    ->Repetitions(1)
-    ->Iterations(100);
-
-// Testing repetitions.
-namespace repetitions {
-int setup = 0;
-}
-
-static void DoSetupWithRepetitions(const benchmark::State&) {
-  repetitions::setup++;
-}
-static void BM_WithRep(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-
-BENCHMARK(BM_WithRep)
-    ->Arg(1)
-    ->Arg(3)
-    ->Arg(5)
-    ->Arg(7)
-    ->Setup(DoSetupWithRepetitions)
-    ->Iterations(100)
-    ->Repetitions(4);
-
-int main(int argc, char** argv) {
-  benchmark::Initialize(&argc, argv);
-
-  size_t ret = benchmark::RunSpecifiedBenchmarks(".");
-  assert(ret > 0);
-
-  // Setup/Teardown is called once for each arg group (1,3,5,7).
-  assert(single::setup_call == 4);
-  assert(single::teardown_call == 4);
-
-  // 3 group of threads calling this function (3,5,10).
-  assert(concurrent::setup_call.load(std::memory_order_relaxed) == 3);
-  assert(concurrent::teardown_call.load(std::memory_order_relaxed) == 3);
-  assert((5 + 10 + 15) ==
-         concurrent::func_call.load(std::memory_order_relaxed));
-
-  // Setup is called 4 times, once for each arg group (1,3,5,7)
-  assert(fixture_interaction::setup == 4);
-  // Fixture::Setup is called everytime the bm routine is run.
-  // The exact number is indeterministic, so we just assert that
-  // it's more than setup.
-  assert(fixture_interaction::fixture_setup > fixture_interaction::setup);
-
-  // Setup is call once for each repetition * num_arg =  4 * 4 = 16.
-  assert(repetitions::setup == 16);
-
-  return 0;
-}
diff --git a/3rdparty/benchmark/test/benchmark_test.cc b/3rdparty/benchmark/test/benchmark_test.cc
deleted file mode 100644
index 2906cdcd..00000000
--- a/3rdparty/benchmark/test/benchmark_test.cc
+++ /dev/null
@@ -1,247 +0,0 @@
-#include "benchmark/benchmark.h"
-
-#include <assert.h>
-#include <math.h>
-#include <stdint.h>
-
-#include <chrono>
-#include <cstdlib>
-#include <iostream>
-#include <limits>
-#include <list>
-#include <map>
-#include <mutex>
-#include <set>
-#include <sstream>
-#include <string>
-#include <thread>
-#include <utility>
-#include <vector>
-
-#if defined(__GNUC__)
-#define BENCHMARK_NOINLINE __attribute__((noinline))
-#else
-#define BENCHMARK_NOINLINE
-#endif
-
-namespace {
-
-int BENCHMARK_NOINLINE Factorial(uint32_t n) {
-  return (n == 1) ? 1 : n * Factorial(n - 1);
-}
-
-double CalculatePi(int depth) {
-  double pi = 0.0;
-  for (int i = 0; i < depth; ++i) {
-    double numerator = static_cast<double>(((i % 2) * 2) - 1);
-    double denominator = static_cast<double>((2 * i) - 1);
-    pi += numerator / denominator;
-  }
-  return (pi - 1.0) * 4;
-}
-
-std::set<int64_t> ConstructRandomSet(int64_t size) {
-  std::set<int64_t> s;
-  for (int i = 0; i < size; ++i) s.insert(s.end(), i);
-  return s;
-}
-
-std::mutex test_vector_mu;
-std::vector<int>* test_vector = nullptr;
-
-}  // end namespace
-
-static void BM_Factorial(benchmark::State& state) {
-  int fac_42 = 0;
-  for (auto _ : state) fac_42 = Factorial(8);
-  // Prevent compiler optimizations
-  std::stringstream ss;
-  ss << fac_42;
-  state.SetLabel(ss.str());
-}
-BENCHMARK(BM_Factorial);
-BENCHMARK(BM_Factorial)->UseRealTime();
-
-static void BM_CalculatePiRange(benchmark::State& state) {
-  double pi = 0.0;
-  for (auto _ : state) pi = CalculatePi(static_cast<int>(state.range(0)));
-  std::stringstream ss;
-  ss << pi;
-  state.SetLabel(ss.str());
-}
-BENCHMARK_RANGE(BM_CalculatePiRange, 1, 1024 * 1024);
-
-static void BM_CalculatePi(benchmark::State& state) {
-  static const int depth = 1024;
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(CalculatePi(static_cast<int>(depth)));
-  }
-}
-BENCHMARK(BM_CalculatePi)->Threads(8);
-BENCHMARK(BM_CalculatePi)->ThreadRange(1, 32);
-BENCHMARK(BM_CalculatePi)->ThreadPerCpu();
-
-static void BM_SetInsert(benchmark::State& state) {
-  std::set<int64_t> data;
-  for (auto _ : state) {
-    state.PauseTiming();
-    data = ConstructRandomSet(state.range(0));
-    state.ResumeTiming();
-    for (int j = 0; j < state.range(1); ++j) data.insert(rand());
-  }
-  state.SetItemsProcessed(state.iterations() * state.range(1));
-  state.SetBytesProcessed(state.iterations() * state.range(1) * sizeof(int));
-}
-
-// Test many inserts at once to reduce the total iterations needed. Otherwise,
-// the slower, non-timed part of each iteration will make the benchmark take
-// forever.
-BENCHMARK(BM_SetInsert)->Ranges({{1 << 10, 8 << 10}, {128, 512}});
-
-template <typename Container,
-          typename ValueType = typename Container::value_type>
-static void BM_Sequential(benchmark::State& state) {
-  ValueType v = 42;
-  for (auto _ : state) {
-    Container c;
-    for (int64_t i = state.range(0); --i;) c.push_back(v);
-  }
-  const int64_t items_processed = state.iterations() * state.range(0);
-  state.SetItemsProcessed(items_processed);
-  state.SetBytesProcessed(items_processed * sizeof(v));
-}
-BENCHMARK_TEMPLATE2(BM_Sequential, std::vector<int>, int)
-    ->Range(1 << 0, 1 << 10);
-BENCHMARK_TEMPLATE(BM_Sequential, std::list<int>)->Range(1 << 0, 1 << 10);
-// Test the variadic version of BENCHMARK_TEMPLATE in C++11 and beyond.
-#ifdef BENCHMARK_HAS_CXX11
-BENCHMARK_TEMPLATE(BM_Sequential, std::vector<int>, int)->Arg(512);
-#endif
-
-static void BM_StringCompare(benchmark::State& state) {
-  size_t len = static_cast<size_t>(state.range(0));
-  std::string s1(len, '-');
-  std::string s2(len, '-');
-  for (auto _ : state) benchmark::DoNotOptimize(s1.compare(s2));
-}
-BENCHMARK(BM_StringCompare)->Range(1, 1 << 20);
-
-static void BM_SetupTeardown(benchmark::State& state) {
-  if (state.thread_index() == 0) {
-    // No need to lock test_vector_mu here as this is running single-threaded.
-    test_vector = new std::vector<int>();
-  }
-  int i = 0;
-  for (auto _ : state) {
-    std::lock_guard<std::mutex> l(test_vector_mu);
-    if (i % 2 == 0)
-      test_vector->push_back(i);
-    else
-      test_vector->pop_back();
-    ++i;
-  }
-  if (state.thread_index() == 0) {
-    delete test_vector;
-  }
-}
-BENCHMARK(BM_SetupTeardown)->ThreadPerCpu();
-
-static void BM_LongTest(benchmark::State& state) {
-  double tracker = 0.0;
-  for (auto _ : state) {
-    for (int i = 0; i < state.range(0); ++i)
-      benchmark::DoNotOptimize(tracker += i);
-  }
-}
-BENCHMARK(BM_LongTest)->Range(1 << 16, 1 << 28);
-
-static void BM_ParallelMemset(benchmark::State& state) {
-  int64_t size = state.range(0) / static_cast<int64_t>(sizeof(int));
-  int thread_size = static_cast<int>(size) / state.threads();
-  int from = thread_size * state.thread_index();
-  int to = from + thread_size;
-
-  if (state.thread_index() == 0) {
-    test_vector = new std::vector<int>(static_cast<size_t>(size));
-  }
-
-  for (auto _ : state) {
-    for (int i = from; i < to; i++) {
-      // No need to lock test_vector_mu as ranges
-      // do not overlap between threads.
-      benchmark::DoNotOptimize(test_vector->at(i) = 1);
-    }
-  }
-
-  if (state.thread_index() == 0) {
-    delete test_vector;
-  }
-}
-BENCHMARK(BM_ParallelMemset)->Arg(10 << 20)->ThreadRange(1, 4);
-
-static void BM_ManualTiming(benchmark::State& state) {
-  int64_t slept_for = 0;
-  int64_t microseconds = state.range(0);
-  std::chrono::duration<double, std::micro> sleep_duration{
-      static_cast<double>(microseconds)};
-
-  for (auto _ : state) {
-    auto start = std::chrono::high_resolution_clock::now();
-    // Simulate some useful workload with a sleep
-    std::this_thread::sleep_for(
-        std::chrono::duration_cast<std::chrono::nanoseconds>(sleep_duration));
-    auto end = std::chrono::high_resolution_clock::now();
-
-    auto elapsed =
-        std::chrono::duration_cast<std::chrono::duration<double>>(end - start);
-
-    state.SetIterationTime(elapsed.count());
-    slept_for += microseconds;
-  }
-  state.SetItemsProcessed(slept_for);
-}
-BENCHMARK(BM_ManualTiming)->Range(1, 1 << 14)->UseRealTime();
-BENCHMARK(BM_ManualTiming)->Range(1, 1 << 14)->UseManualTime();
-
-#ifdef BENCHMARK_HAS_CXX11
-
-template <class... Args>
-void BM_with_args(benchmark::State& state, Args&&...) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK_CAPTURE(BM_with_args, int_test, 42, 43, 44);
-BENCHMARK_CAPTURE(BM_with_args, string_and_pair_test, std::string("abc"),
-                  std::pair<int, double>(42, 3.8));
-
-void BM_non_template_args(benchmark::State& state, int, double) {
-  while (state.KeepRunning()) {
-  }
-}
-BENCHMARK_CAPTURE(BM_non_template_args, basic_test, 0, 0);
-
-#endif  // BENCHMARK_HAS_CXX11
-
-static void BM_DenseThreadRanges(benchmark::State& st) {
-  switch (st.range(0)) {
-    case 1:
-      assert(st.threads() == 1 || st.threads() == 2 || st.threads() == 3);
-      break;
-    case 2:
-      assert(st.threads() == 1 || st.threads() == 3 || st.threads() == 4);
-      break;
-    case 3:
-      assert(st.threads() == 5 || st.threads() == 8 || st.threads() == 11 ||
-             st.threads() == 14);
-      break;
-    default:
-      assert(false && "Invalid test case number");
-  }
-  while (st.KeepRunning()) {
-  }
-}
-BENCHMARK(BM_DenseThreadRanges)->Arg(1)->DenseThreadRange(1, 3);
-BENCHMARK(BM_DenseThreadRanges)->Arg(2)->DenseThreadRange(1, 4, 2);
-BENCHMARK(BM_DenseThreadRanges)->Arg(3)->DenseThreadRange(5, 14, 3);
-
-BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/clobber_memory_assembly_test.cc b/3rdparty/benchmark/test/clobber_memory_assembly_test.cc
deleted file mode 100644
index ab269130..00000000
--- a/3rdparty/benchmark/test/clobber_memory_assembly_test.cc
+++ /dev/null
@@ -1,63 +0,0 @@
-#include <benchmark/benchmark.h>
-
-#ifdef __clang__
-#pragma clang diagnostic ignored "-Wreturn-type"
-#endif
-
-extern "C" {
-
-extern int ExternInt;
-extern int ExternInt2;
-extern int ExternInt3;
-}
-
-// CHECK-LABEL: test_basic:
-extern "C" void test_basic() {
-  int x;
-  benchmark::DoNotOptimize(&x);
-  x = 101;
-  benchmark::ClobberMemory();
-  // CHECK: leaq [[DEST:[^,]+]], %rax
-  // CHECK: movl $101, [[DEST]]
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_redundant_store:
-extern "C" void test_redundant_store() {
-  ExternInt = 3;
-  benchmark::ClobberMemory();
-  ExternInt = 51;
-  // CHECK-DAG: ExternInt
-  // CHECK-DAG: movl $3
-  // CHECK: movl $51
-}
-
-// CHECK-LABEL: test_redundant_read:
-extern "C" void test_redundant_read() {
-  int x;
-  benchmark::DoNotOptimize(&x);
-  x = ExternInt;
-  benchmark::ClobberMemory();
-  x = ExternInt2;
-  // CHECK: leaq [[DEST:[^,]+]], %rax
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, [[DEST]]
-  // CHECK-NOT: ExternInt2
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_redundant_read2:
-extern "C" void test_redundant_read2() {
-  int x;
-  benchmark::DoNotOptimize(&x);
-  x = ExternInt;
-  benchmark::ClobberMemory();
-  x = ExternInt2;
-  benchmark::ClobberMemory();
-  // CHECK: leaq [[DEST:[^,]+]], %rax
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, [[DEST]]
-  // CHECK: ExternInt2(%rip)
-  // CHECK: movl %eax, [[DEST]]
-  // CHECK: ret
-}
diff --git a/3rdparty/benchmark/test/commandlineflags_gtest.cc b/3rdparty/benchmark/test/commandlineflags_gtest.cc
deleted file mode 100644
index 8412008f..00000000
--- a/3rdparty/benchmark/test/commandlineflags_gtest.cc
+++ /dev/null
@@ -1,228 +0,0 @@
-#include <cstdlib>
-
-#include "../src/commandlineflags.h"
-#include "../src/internal_macros.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace benchmark {
-namespace {
-
-#if defined(BENCHMARK_OS_WINDOWS)
-int setenv(const char* name, const char* value, int overwrite) {
-  if (!overwrite) {
-    // NOTE: getenv_s is far superior but not available under mingw.
-    char* env_value = getenv(name);
-    if (env_value == nullptr) {
-      return -1;
-    }
-  }
-  return _putenv_s(name, value);
-}
-
-int unsetenv(const char* name) { return _putenv_s(name, ""); }
-
-#endif  // BENCHMARK_OS_WINDOWS
-
-TEST(BoolFromEnv, Default) {
-  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
-  EXPECT_EQ(BoolFromEnv("not_in_env", true), true);
-}
-
-TEST(BoolFromEnv, False) {
-  ASSERT_EQ(setenv("IN_ENV", "0", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "N", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "n", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "NO", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "No", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "no", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "F", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "f", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "FALSE", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "False", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "false", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "OFF", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "Off", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "off", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-}
-
-TEST(BoolFromEnv, True) {
-  ASSERT_EQ(setenv("IN_ENV", "1", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "Y", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "y", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "YES", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "Yes", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "yes", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "T", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "t", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "TRUE", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "True", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "true", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "ON", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "On", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "on", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-#ifndef BENCHMARK_OS_WINDOWS
-  ASSERT_EQ(setenv("IN_ENV", "", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-#endif
-}
-
-TEST(Int32FromEnv, NotInEnv) {
-  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
-  EXPECT_EQ(Int32FromEnv("not_in_env", 42), 42);
-}
-
-TEST(Int32FromEnv, InvalidInteger) {
-  ASSERT_EQ(setenv("IN_ENV", "foo", 1), 0);
-  EXPECT_EQ(Int32FromEnv("in_env", 42), 42);
-  unsetenv("IN_ENV");
-}
-
-TEST(Int32FromEnv, ValidInteger) {
-  ASSERT_EQ(setenv("IN_ENV", "42", 1), 0);
-  EXPECT_EQ(Int32FromEnv("in_env", 64), 42);
-  unsetenv("IN_ENV");
-}
-
-TEST(DoubleFromEnv, NotInEnv) {
-  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
-  EXPECT_EQ(DoubleFromEnv("not_in_env", 0.51), 0.51);
-}
-
-TEST(DoubleFromEnv, InvalidReal) {
-  ASSERT_EQ(setenv("IN_ENV", "foo", 1), 0);
-  EXPECT_EQ(DoubleFromEnv("in_env", 0.51), 0.51);
-  unsetenv("IN_ENV");
-}
-
-TEST(DoubleFromEnv, ValidReal) {
-  ASSERT_EQ(setenv("IN_ENV", "0.51", 1), 0);
-  EXPECT_EQ(DoubleFromEnv("in_env", 0.71), 0.51);
-  unsetenv("IN_ENV");
-}
-
-TEST(StringFromEnv, Default) {
-  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
-  EXPECT_STREQ(StringFromEnv("not_in_env", "foo"), "foo");
-}
-
-TEST(StringFromEnv, Valid) {
-  ASSERT_EQ(setenv("IN_ENV", "foo", 1), 0);
-  EXPECT_STREQ(StringFromEnv("in_env", "bar"), "foo");
-  unsetenv("IN_ENV");
-}
-
-TEST(KvPairsFromEnv, Default) {
-  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
-  EXPECT_THAT(KvPairsFromEnv("not_in_env", {{"foo", "bar"}}),
-              testing::ElementsAre(testing::Pair("foo", "bar")));
-}
-
-TEST(KvPairsFromEnv, MalformedReturnsDefault) {
-  ASSERT_EQ(setenv("IN_ENV", "foo", 1), 0);
-  EXPECT_THAT(KvPairsFromEnv("in_env", {{"foo", "bar"}}),
-              testing::ElementsAre(testing::Pair("foo", "bar")));
-  unsetenv("IN_ENV");
-}
-
-TEST(KvPairsFromEnv, Single) {
-  ASSERT_EQ(setenv("IN_ENV", "foo=bar", 1), 0);
-  EXPECT_THAT(KvPairsFromEnv("in_env", {}),
-              testing::ElementsAre(testing::Pair("foo", "bar")));
-  unsetenv("IN_ENV");
-}
-
-TEST(KvPairsFromEnv, Multiple) {
-  ASSERT_EQ(setenv("IN_ENV", "foo=bar,baz=qux", 1), 0);
-  EXPECT_THAT(KvPairsFromEnv("in_env", {}),
-              testing::UnorderedElementsAre(testing::Pair("foo", "bar"),
-                                            testing::Pair("baz", "qux")));
-  unsetenv("IN_ENV");
-}
-
-}  // namespace
-}  // namespace benchmark
diff --git a/3rdparty/benchmark/test/complexity_test.cc b/3rdparty/benchmark/test/complexity_test.cc
deleted file mode 100644
index 1251cd44..00000000
--- a/3rdparty/benchmark/test/complexity_test.cc
+++ /dev/null
@@ -1,226 +0,0 @@
-#undef NDEBUG
-#include <algorithm>
-#include <cassert>
-#include <cmath>
-#include <cstdlib>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-namespace {
-
-#define ADD_COMPLEXITY_CASES(...) \
-  int CONCAT(dummy, __LINE__) = AddComplexityTest(__VA_ARGS__)
-
-int AddComplexityTest(const std::string &test_name,
-                      const std::string &big_o_test_name,
-                      const std::string &rms_test_name,
-                      const std::string &big_o, int family_index) {
-  SetSubstitutions({{"%name", test_name},
-                    {"%bigo_name", big_o_test_name},
-                    {"%rms_name", rms_test_name},
-                    {"%bigo_str", "[ ]* %float " + big_o},
-                    {"%bigo", big_o},
-                    {"%rms", "[ ]*[0-9]+ %"}});
-  AddCases(
-      TC_ConsoleOut,
-      {{"^%bigo_name %bigo_str %bigo_str[ ]*$"},
-       {"^%bigo_name", MR_Not},  // Assert we we didn't only matched a name.
-       {"^%rms_name %rms %rms[ ]*$", MR_Next}});
-  AddCases(
-      TC_JSONOut,
-      {{"\"name\": \"%bigo_name\",$"},
-       {"\"family_index\": " + std::to_string(family_index) + ",$", MR_Next},
-       {"\"per_family_instance_index\": 0,$", MR_Next},
-       {"\"run_name\": \"%name\",$", MR_Next},
-       {"\"run_type\": \"aggregate\",$", MR_Next},
-       {"\"repetitions\": %int,$", MR_Next},
-       {"\"threads\": 1,$", MR_Next},
-       {"\"aggregate_name\": \"BigO\",$", MR_Next},
-       {"\"aggregate_unit\": \"time\",$", MR_Next},
-       {"\"cpu_coefficient\": %float,$", MR_Next},
-       {"\"real_coefficient\": %float,$", MR_Next},
-       {"\"big_o\": \"%bigo\",$", MR_Next},
-       {"\"time_unit\": \"ns\"$", MR_Next},
-       {"}", MR_Next},
-       {"\"name\": \"%rms_name\",$"},
-       {"\"family_index\": " + std::to_string(family_index) + ",$", MR_Next},
-       {"\"per_family_instance_index\": 0,$", MR_Next},
-       {"\"run_name\": \"%name\",$", MR_Next},
-       {"\"run_type\": \"aggregate\",$", MR_Next},
-       {"\"repetitions\": %int,$", MR_Next},
-       {"\"threads\": 1,$", MR_Next},
-       {"\"aggregate_name\": \"RMS\",$", MR_Next},
-       {"\"aggregate_unit\": \"percentage\",$", MR_Next},
-       {"\"rms\": %float$", MR_Next},
-       {"}", MR_Next}});
-  AddCases(TC_CSVOut, {{"^\"%bigo_name\",,%float,%float,%bigo,,,,,$"},
-                       {"^\"%bigo_name\"", MR_Not},
-                       {"^\"%rms_name\",,%float,%float,,,,,,$", MR_Next}});
-  return 0;
-}
-
-}  // end namespace
-
-// ========================================================================= //
-// --------------------------- Testing BigO O(1) --------------------------- //
-// ========================================================================= //
-
-void BM_Complexity_O1(benchmark::State &state) {
-  for (auto _ : state) {
-    for (int i = 0; i < 1024; ++i) {
-      benchmark::DoNotOptimize(&i);
-    }
-  }
-  state.SetComplexityN(state.range(0));
-}
-BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity(benchmark::o1);
-BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity();
-BENCHMARK(BM_Complexity_O1)
-    ->Range(1, 1 << 18)
-    ->Complexity([](benchmark::IterationCount) { return 1.0; });
-
-const char *one_test_name = "BM_Complexity_O1";
-const char *big_o_1_test_name = "BM_Complexity_O1_BigO";
-const char *rms_o_1_test_name = "BM_Complexity_O1_RMS";
-const char *enum_big_o_1 = "\\([0-9]+\\)";
-// FIXME: Tolerate both '(1)' and 'lgN' as output when the complexity is auto
-// deduced.
-// See https://github.com/google/benchmark/issues/272
-const char *auto_big_o_1 = "(\\([0-9]+\\))|(lgN)";
-const char *lambda_big_o_1 = "f\\(N\\)";
-
-// Add enum tests
-ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
-                     enum_big_o_1, /*family_index=*/0);
-
-// Add auto enum tests
-ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
-                     auto_big_o_1, /*family_index=*/1);
-
-// Add lambda tests
-ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
-                     lambda_big_o_1, /*family_index=*/2);
-
-// ========================================================================= //
-// --------------------------- Testing BigO O(N) --------------------------- //
-// ========================================================================= //
-
-std::vector<int> ConstructRandomVector(int64_t size) {
-  std::vector<int> v;
-  v.reserve(static_cast<int>(size));
-  for (int i = 0; i < size; ++i) {
-    v.push_back(static_cast<int>(std::rand() % size));
-  }
-  return v;
-}
-
-void BM_Complexity_O_N(benchmark::State &state) {
-  auto v = ConstructRandomVector(state.range(0));
-  // Test worst case scenario (item not in vector)
-  const int64_t item_not_in_vector = state.range(0) * 2;
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(std::find(v.begin(), v.end(), item_not_in_vector));
-  }
-  state.SetComplexityN(state.range(0));
-}
-BENCHMARK(BM_Complexity_O_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity(benchmark::oN);
-BENCHMARK(BM_Complexity_O_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity([](benchmark::IterationCount n) -> double {
-      return static_cast<double>(n);
-    });
-BENCHMARK(BM_Complexity_O_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity();
-
-const char *n_test_name = "BM_Complexity_O_N";
-const char *big_o_n_test_name = "BM_Complexity_O_N_BigO";
-const char *rms_o_n_test_name = "BM_Complexity_O_N_RMS";
-const char *enum_auto_big_o_n = "N";
-const char *lambda_big_o_n = "f\\(N\\)";
-
-// Add enum tests
-ADD_COMPLEXITY_CASES(n_test_name, big_o_n_test_name, rms_o_n_test_name,
-                     enum_auto_big_o_n, /*family_index=*/3);
-
-// Add lambda tests
-ADD_COMPLEXITY_CASES(n_test_name, big_o_n_test_name, rms_o_n_test_name,
-                     lambda_big_o_n, /*family_index=*/4);
-
-// ========================================================================= //
-// ------------------------- Testing BigO O(N*lgN) ------------------------- //
-// ========================================================================= //
-
-static void BM_Complexity_O_N_log_N(benchmark::State &state) {
-  auto v = ConstructRandomVector(state.range(0));
-  for (auto _ : state) {
-    std::sort(v.begin(), v.end());
-  }
-  state.SetComplexityN(state.range(0));
-}
-static const double kLog2E = 1.44269504088896340736;
-BENCHMARK(BM_Complexity_O_N_log_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity(benchmark::oNLogN);
-BENCHMARK(BM_Complexity_O_N_log_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity([](benchmark::IterationCount n) {
-      return kLog2E * n * log(static_cast<double>(n));
-    });
-BENCHMARK(BM_Complexity_O_N_log_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity();
-
-const char *n_lg_n_test_name = "BM_Complexity_O_N_log_N";
-const char *big_o_n_lg_n_test_name = "BM_Complexity_O_N_log_N_BigO";
-const char *rms_o_n_lg_n_test_name = "BM_Complexity_O_N_log_N_RMS";
-const char *enum_auto_big_o_n_lg_n = "NlgN";
-const char *lambda_big_o_n_lg_n = "f\\(N\\)";
-
-// Add enum tests
-ADD_COMPLEXITY_CASES(n_lg_n_test_name, big_o_n_lg_n_test_name,
-                     rms_o_n_lg_n_test_name, enum_auto_big_o_n_lg_n,
-                     /*family_index=*/6);
-
-// Add lambda tests
-ADD_COMPLEXITY_CASES(n_lg_n_test_name, big_o_n_lg_n_test_name,
-                     rms_o_n_lg_n_test_name, lambda_big_o_n_lg_n,
-                     /*family_index=*/7);
-
-// ========================================================================= //
-// -------- Testing formatting of Complexity with captured args ------------ //
-// ========================================================================= //
-
-void BM_ComplexityCaptureArgs(benchmark::State &state, int n) {
-  for (auto _ : state) {
-    // This test requires a non-zero CPU time to avoid divide-by-zero
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  state.SetComplexityN(n);
-}
-
-BENCHMARK_CAPTURE(BM_ComplexityCaptureArgs, capture_test, 100)
-    ->Complexity(benchmark::oN)
-    ->Ranges({{1, 2}, {3, 4}});
-
-const std::string complexity_capture_name =
-    "BM_ComplexityCaptureArgs/capture_test";
-
-ADD_COMPLEXITY_CASES(complexity_capture_name, complexity_capture_name + "_BigO",
-                     complexity_capture_name + "_RMS", "N", /*family_index=*/9);
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char *argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/test/cxx03_test.cc b/3rdparty/benchmark/test/cxx03_test.cc
deleted file mode 100644
index 9711c1bd..00000000
--- a/3rdparty/benchmark/test/cxx03_test.cc
+++ /dev/null
@@ -1,62 +0,0 @@
-#undef NDEBUG
-#include <cassert>
-#include <cstddef>
-
-#include "benchmark/benchmark.h"
-
-#if __cplusplus >= 201103L
-#error C++11 or greater detected. Should be C++03.
-#endif
-
-#ifdef BENCHMARK_HAS_CXX11
-#error C++11 or greater detected by the library. BENCHMARK_HAS_CXX11 is defined.
-#endif
-
-void BM_empty(benchmark::State& state) {
-  while (state.KeepRunning()) {
-    volatile benchmark::IterationCount x = state.iterations();
-    ((void)x);
-  }
-}
-BENCHMARK(BM_empty);
-
-// The new C++11 interface for args/ranges requires initializer list support.
-// Therefore we provide the old interface to support C++03.
-void BM_old_arg_range_interface(benchmark::State& state) {
-  assert((state.range(0) == 1 && state.range(1) == 2) ||
-         (state.range(0) == 5 && state.range(1) == 6));
-  while (state.KeepRunning()) {
-  }
-}
-BENCHMARK(BM_old_arg_range_interface)->ArgPair(1, 2)->RangePair(5, 5, 6, 6);
-
-template <class T, class U>
-void BM_template2(benchmark::State& state) {
-  BM_empty(state);
-}
-BENCHMARK_TEMPLATE2(BM_template2, int, long);
-
-template <class T>
-void BM_template1(benchmark::State& state) {
-  BM_empty(state);
-}
-BENCHMARK_TEMPLATE(BM_template1, long);
-BENCHMARK_TEMPLATE1(BM_template1, int);
-
-template <class T>
-struct BM_Fixture : public ::benchmark::Fixture {};
-
-BENCHMARK_TEMPLATE_F(BM_Fixture, BM_template1, long)(benchmark::State& state) {
-  BM_empty(state);
-}
-BENCHMARK_TEMPLATE1_F(BM_Fixture, BM_template2, int)(benchmark::State& state) {
-  BM_empty(state);
-}
-
-void BM_counters(benchmark::State& state) {
-  BM_empty(state);
-  state.counters["Foo"] = 2;
-}
-BENCHMARK(BM_counters);
-
-BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/diagnostics_test.cc b/3rdparty/benchmark/test/diagnostics_test.cc
deleted file mode 100644
index c54d5b0d..00000000
--- a/3rdparty/benchmark/test/diagnostics_test.cc
+++ /dev/null
@@ -1,80 +0,0 @@
-// Testing:
-//   State::PauseTiming()
-//   State::ResumeTiming()
-// Test that CHECK's within these function diagnose when they are called
-// outside of the KeepRunning() loop.
-//
-// NOTE: Users should NOT include or use src/check.h. This is only done in
-// order to test library internals.
-
-#include <cstdlib>
-#include <stdexcept>
-
-#include "../src/check.h"
-#include "benchmark/benchmark.h"
-
-#if defined(__GNUC__) && !defined(__EXCEPTIONS)
-#define TEST_HAS_NO_EXCEPTIONS
-#endif
-
-void TestHandler() {
-#ifndef TEST_HAS_NO_EXCEPTIONS
-  throw std::logic_error("");
-#else
-  std::abort();
-#endif
-}
-
-void try_invalid_pause_resume(benchmark::State& state) {
-#if !defined(TEST_BENCHMARK_LIBRARY_HAS_NO_ASSERTIONS) && \
-    !defined(TEST_HAS_NO_EXCEPTIONS)
-  try {
-    state.PauseTiming();
-    std::abort();
-  } catch (std::logic_error const&) {
-  }
-  try {
-    state.ResumeTiming();
-    std::abort();
-  } catch (std::logic_error const&) {
-  }
-#else
-  (void)state;  // avoid unused warning
-#endif
-}
-
-void BM_diagnostic_test(benchmark::State& state) {
-  static bool called_once = false;
-
-  if (called_once == false) try_invalid_pause_resume(state);
-
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-
-  if (called_once == false) try_invalid_pause_resume(state);
-
-  called_once = true;
-}
-BENCHMARK(BM_diagnostic_test);
-
-void BM_diagnostic_test_keep_running(benchmark::State& state) {
-  static bool called_once = false;
-
-  if (called_once == false) try_invalid_pause_resume(state);
-
-  while (state.KeepRunning()) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-
-  if (called_once == false) try_invalid_pause_resume(state);
-
-  called_once = true;
-}
-BENCHMARK(BM_diagnostic_test_keep_running);
-
-int main(int argc, char* argv[]) {
-  benchmark::internal::GetAbortHandler() = &TestHandler;
-  benchmark::Initialize(&argc, argv);
-  benchmark::RunSpecifiedBenchmarks();
-}
diff --git a/3rdparty/benchmark/test/display_aggregates_only_test.cc b/3rdparty/benchmark/test/display_aggregates_only_test.cc
deleted file mode 100644
index 6ad65e7f..00000000
--- a/3rdparty/benchmark/test/display_aggregates_only_test.cc
+++ /dev/null
@@ -1,45 +0,0 @@
-
-#undef NDEBUG
-#include <cstdio>
-#include <string>
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// Ok this test is super ugly. We want to check what happens with the file
-// reporter in the presence of DisplayAggregatesOnly().
-// We do not care about console output, the normal tests check that already.
-
-void BM_SummaryRepeat(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->DisplayAggregatesOnly();
-
-int main(int argc, char* argv[]) {
-  const std::string output = GetFileReporterOutput(argc, argv);
-
-  if (SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3") != 7 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3\"") != 3 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_mean\"") != 1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_median\"") !=
-          1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\"") !=
-          1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_cv\"") != 1) {
-    std::cout << "Precondition mismatch. Expected to only find 8 "
-                 "occurrences of \"BM_SummaryRepeat/repeats:3\" substring:\n"
-                 "\"name\": \"BM_SummaryRepeat/repeats:3\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_mean\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_median\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_cv\"\nThe entire "
-                 "output:\n";
-    std::cout << output;
-    return 1;
-  }
-
-  return 0;
-}
diff --git a/3rdparty/benchmark/test/donotoptimize_assembly_test.cc b/3rdparty/benchmark/test/donotoptimize_assembly_test.cc
deleted file mode 100644
index 2e86a51e..00000000
--- a/3rdparty/benchmark/test/donotoptimize_assembly_test.cc
+++ /dev/null
@@ -1,161 +0,0 @@
-#include <benchmark/benchmark.h>
-
-#ifdef __clang__
-#pragma clang diagnostic ignored "-Wreturn-type"
-#endif
-
-extern "C" {
-
-extern int ExternInt;
-extern int ExternInt2;
-extern int ExternInt3;
-
-inline int Add42(int x) { return x + 42; }
-
-struct NotTriviallyCopyable {
-  NotTriviallyCopyable();
-  explicit NotTriviallyCopyable(int x) : value(x) {}
-  NotTriviallyCopyable(NotTriviallyCopyable const &);
-  int value;
-};
-
-struct Large {
-  int value;
-  int data[2];
-};
-}
-// CHECK-LABEL: test_with_rvalue:
-extern "C" void test_with_rvalue() {
-  benchmark::DoNotOptimize(Add42(0));
-  // CHECK: movl $42, %eax
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_large_rvalue:
-extern "C" void test_with_large_rvalue() {
-  benchmark::DoNotOptimize(Large{ExternInt, {ExternInt, ExternInt}});
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]]
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_non_trivial_rvalue:
-extern "C" void test_with_non_trivial_rvalue() {
-  benchmark::DoNotOptimize(NotTriviallyCopyable(ExternInt));
-  // CHECK: mov{{l|q}} ExternInt(%rip)
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_lvalue:
-extern "C" void test_with_lvalue() {
-  int x = 101;
-  benchmark::DoNotOptimize(x);
-  // CHECK-GNU: movl $101, %eax
-  // CHECK-CLANG: movl $101, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_large_lvalue:
-extern "C" void test_with_large_lvalue() {
-  Large L{ExternInt, {ExternInt, ExternInt}};
-  benchmark::DoNotOptimize(L);
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_non_trivial_lvalue:
-extern "C" void test_with_non_trivial_lvalue() {
-  NotTriviallyCopyable NTC(ExternInt);
-  benchmark::DoNotOptimize(NTC);
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_const_lvalue:
-extern "C" void test_with_const_lvalue() {
-  const int x = 123;
-  benchmark::DoNotOptimize(x);
-  // CHECK: movl $123, %eax
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_large_const_lvalue:
-extern "C" void test_with_large_const_lvalue() {
-  const Large L{ExternInt, {ExternInt, ExternInt}};
-  benchmark::DoNotOptimize(L);
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_non_trivial_const_lvalue:
-extern "C" void test_with_non_trivial_const_lvalue() {
-  const NotTriviallyCopyable Obj(ExternInt);
-  benchmark::DoNotOptimize(Obj);
-  // CHECK: mov{{q|l}} ExternInt(%rip)
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_div_by_two:
-extern "C" int test_div_by_two(int input) {
-  int divisor = 2;
-  benchmark::DoNotOptimize(divisor);
-  return input / divisor;
-  // CHECK: movl $2, [[DEST:.*]]
-  // CHECK: idivl [[DEST]]
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_inc_integer:
-extern "C" int test_inc_integer() {
-  int x = 0;
-  for (int i = 0; i < 5; ++i) benchmark::DoNotOptimize(++x);
-  // CHECK: movl $1, [[DEST:.*]]
-  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
-  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
-  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
-  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
-  // CHECK-CLANG: movl [[DEST]], %eax
-  // CHECK: ret
-  return x;
-}
-
-// CHECK-LABEL: test_pointer_rvalue
-extern "C" void test_pointer_rvalue() {
-  // CHECK: movl $42, [[DEST:.*]]
-  // CHECK: leaq [[DEST]], %rax
-  // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: ret
-  int x = 42;
-  benchmark::DoNotOptimize(&x);
-}
-
-// CHECK-LABEL: test_pointer_const_lvalue:
-extern "C" void test_pointer_const_lvalue() {
-  // CHECK: movl $42, [[DEST:.*]]
-  // CHECK: leaq [[DEST]], %rax
-  // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: ret
-  int x = 42;
-  int *const xp = &x;
-  benchmark::DoNotOptimize(xp);
-}
-
-// CHECK-LABEL: test_pointer_lvalue:
-extern "C" void test_pointer_lvalue() {
-  // CHECK: movl $42, [[DEST:.*]]
-  // CHECK: leaq [[DEST]], %rax
-  // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z+]+]])
-  // CHECK: ret
-  int x = 42;
-  int *xp = &x;
-  benchmark::DoNotOptimize(xp);
-}
diff --git a/3rdparty/benchmark/test/donotoptimize_test.cc b/3rdparty/benchmark/test/donotoptimize_test.cc
deleted file mode 100644
index c321f156..00000000
--- a/3rdparty/benchmark/test/donotoptimize_test.cc
+++ /dev/null
@@ -1,53 +0,0 @@
-#include <cstdint>
-
-#include "benchmark/benchmark.h"
-
-namespace {
-#if defined(__GNUC__)
-std::uint64_t double_up(const std::uint64_t x) __attribute__((const));
-#endif
-std::uint64_t double_up(const std::uint64_t x) { return x * 2; }
-}  // namespace
-
-// Using DoNotOptimize on types like BitRef seem to cause a lot of problems
-// with the inline assembly on both GCC and Clang.
-struct BitRef {
-  int index;
-  unsigned char& byte;
-
- public:
-  static BitRef Make() {
-    static unsigned char arr[2] = {};
-    BitRef b(1, arr[0]);
-    return b;
-  }
-
- private:
-  BitRef(int i, unsigned char& b) : index(i), byte(b) {}
-};
-
-int main(int, char*[]) {
-  // this test verifies compilation of DoNotOptimize() for some types
-
-  char buffer8[8] = "";
-  benchmark::DoNotOptimize(buffer8);
-
-  char buffer20[20] = "";
-  benchmark::DoNotOptimize(buffer20);
-
-  char buffer1024[1024] = "";
-  benchmark::DoNotOptimize(buffer1024);
-  benchmark::DoNotOptimize(&buffer1024[0]);
-
-  int x = 123;
-  benchmark::DoNotOptimize(x);
-  benchmark::DoNotOptimize(&x);
-  benchmark::DoNotOptimize(x += 42);
-
-  benchmark::DoNotOptimize(double_up(x));
-
-  // These tests are to e
-  benchmark::DoNotOptimize(BitRef::Make());
-  BitRef lval = BitRef::Make();
-  benchmark::DoNotOptimize(lval);
-}
diff --git a/3rdparty/benchmark/test/filter_test.cc b/3rdparty/benchmark/test/filter_test.cc
deleted file mode 100644
index a567de2d..00000000
--- a/3rdparty/benchmark/test/filter_test.cc
+++ /dev/null
@@ -1,118 +0,0 @@
-#include <algorithm>
-#include <cassert>
-#include <cmath>
-#include <cstdint>
-#include <cstdlib>
-#include <iostream>
-#include <limits>
-#include <sstream>
-#include <string>
-
-#include "benchmark/benchmark.h"
-
-namespace {
-
-class TestReporter : public benchmark::ConsoleReporter {
- public:
-  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE {
-    return ConsoleReporter::ReportContext(context);
-  };
-
-  virtual void ReportRuns(const std::vector<Run>& report) BENCHMARK_OVERRIDE {
-    ++count_;
-    max_family_index_ =
-        std::max<size_t>(max_family_index_, report[0].family_index);
-    ConsoleReporter::ReportRuns(report);
-  };
-
-  TestReporter() : count_(0), max_family_index_(0) {}
-
-  virtual ~TestReporter() {}
-
-  size_t GetCount() const { return count_; }
-
-  size_t GetMaxFamilyIndex() const { return max_family_index_; }
-
- private:
-  mutable size_t count_;
-  mutable size_t max_family_index_;
-};
-
-}  // end namespace
-
-static void NoPrefix(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(NoPrefix);
-
-static void BM_Foo(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_Foo);
-
-static void BM_Bar(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_Bar);
-
-static void BM_FooBar(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_FooBar);
-
-static void BM_FooBa(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_FooBa);
-
-int main(int argc, char** argv) {
-  bool list_only = false;
-  for (int i = 0; i < argc; ++i)
-    list_only |= std::string(argv[i]).find("--benchmark_list_tests") !=
-                 std::string::npos;
-
-  benchmark::Initialize(&argc, argv);
-
-  TestReporter test_reporter;
-  const size_t returned_count =
-      benchmark::RunSpecifiedBenchmarks(&test_reporter);
-
-  if (argc == 2) {
-    // Make sure we ran all of the tests
-    std::stringstream ss(argv[1]);
-    size_t expected_return;
-    ss >> expected_return;
-
-    if (returned_count != expected_return) {
-      std::cerr << "ERROR: Expected " << expected_return
-                << " tests to match the filter but returned_count = "
-                << returned_count << std::endl;
-      return -1;
-    }
-
-    const size_t expected_reports = list_only ? 0 : expected_return;
-    const size_t reports_count = test_reporter.GetCount();
-    if (reports_count != expected_reports) {
-      std::cerr << "ERROR: Expected " << expected_reports
-                << " tests to be run but reported_count = " << reports_count
-                << std::endl;
-      return -1;
-    }
-
-    const size_t max_family_index = test_reporter.GetMaxFamilyIndex();
-    const size_t num_families = reports_count == 0 ? 0 : 1 + max_family_index;
-    if (num_families != expected_reports) {
-      std::cerr << "ERROR: Expected " << expected_reports
-                << " test families to be run but num_families = "
-                << num_families << std::endl;
-      return -1;
-    }
-  }
-
-  return 0;
-}
diff --git a/3rdparty/benchmark/test/fixture_test.cc b/3rdparty/benchmark/test/fixture_test.cc
deleted file mode 100644
index af650dbd..00000000
--- a/3rdparty/benchmark/test/fixture_test.cc
+++ /dev/null
@@ -1,51 +0,0 @@
-
-#include <cassert>
-#include <memory>
-
-#include "benchmark/benchmark.h"
-
-#define FIXTURE_BECHMARK_NAME MyFixture
-
-class FIXTURE_BECHMARK_NAME : public ::benchmark::Fixture {
- public:
-  void SetUp(const ::benchmark::State& state) BENCHMARK_OVERRIDE {
-    if (state.thread_index() == 0) {
-      assert(data.get() == nullptr);
-      data.reset(new int(42));
-    }
-  }
-
-  void TearDown(const ::benchmark::State& state) BENCHMARK_OVERRIDE {
-    if (state.thread_index() == 0) {
-      assert(data.get() != nullptr);
-      data.reset();
-    }
-  }
-
-  ~FIXTURE_BECHMARK_NAME() { assert(data == nullptr); }
-
-  std::unique_ptr<int> data;
-};
-
-BENCHMARK_F(FIXTURE_BECHMARK_NAME, Foo)(benchmark::State& st) {
-  assert(data.get() != nullptr);
-  assert(*data == 42);
-  for (auto _ : st) {
-  }
-}
-
-BENCHMARK_DEFINE_F(FIXTURE_BECHMARK_NAME, Bar)(benchmark::State& st) {
-  if (st.thread_index() == 0) {
-    assert(data.get() != nullptr);
-    assert(*data == 42);
-  }
-  for (auto _ : st) {
-    assert(data.get() != nullptr);
-    assert(*data == 42);
-  }
-  st.SetItemsProcessed(st.range(0));
-}
-BENCHMARK_REGISTER_F(FIXTURE_BECHMARK_NAME, Bar)->Arg(42);
-BENCHMARK_REGISTER_F(FIXTURE_BECHMARK_NAME, Bar)->Arg(42)->ThreadPerCpu();
-
-BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/internal_threading_test.cc b/3rdparty/benchmark/test/internal_threading_test.cc
deleted file mode 100644
index 62b5b955..00000000
--- a/3rdparty/benchmark/test/internal_threading_test.cc
+++ /dev/null
@@ -1,185 +0,0 @@
-
-#undef NDEBUG
-
-#include <chrono>
-#include <thread>
-
-#include "../src/timers.h"
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-static const std::chrono::duration<double, std::milli> time_frame(50);
-static const double time_frame_in_sec(
-    std::chrono::duration_cast<std::chrono::duration<double, std::ratio<1, 1>>>(
-        time_frame)
-        .count());
-
-void MyBusySpinwait() {
-  const auto start = benchmark::ChronoClockNow();
-
-  while (true) {
-    const auto now = benchmark::ChronoClockNow();
-    const auto elapsed = now - start;
-
-    if (std::chrono::duration<double, std::chrono::seconds::period>(elapsed) >=
-        time_frame)
-      return;
-  }
-}
-
-// ========================================================================= //
-// --------------------------- TEST CASES BEGIN ---------------------------- //
-// ========================================================================= //
-
-// ========================================================================= //
-// BM_MainThread
-
-void BM_MainThread(benchmark::State& state) {
-  for (auto _ : state) {
-    MyBusySpinwait();
-    state.SetIterationTime(time_frame_in_sec);
-  }
-  state.counters["invtime"] =
-      benchmark::Counter{1, benchmark::Counter::kIsRate};
-}
-
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(1);
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(1)->UseRealTime();
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(1)->UseManualTime();
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(1)->MeasureProcessCPUTime();
-BENCHMARK(BM_MainThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime()
-    ->UseRealTime();
-BENCHMARK(BM_MainThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime()
-    ->UseManualTime();
-
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(2);
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(2)->UseRealTime();
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(2)->UseManualTime();
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(2)->MeasureProcessCPUTime();
-BENCHMARK(BM_MainThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime()
-    ->UseRealTime();
-BENCHMARK(BM_MainThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime()
-    ->UseManualTime();
-
-// ========================================================================= //
-// BM_WorkerThread
-
-void BM_WorkerThread(benchmark::State& state) {
-  for (auto _ : state) {
-    std::thread Worker(&MyBusySpinwait);
-    Worker.join();
-    state.SetIterationTime(time_frame_in_sec);
-  }
-  state.counters["invtime"] =
-      benchmark::Counter{1, benchmark::Counter::kIsRate};
-}
-
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(1);
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(1)->UseRealTime();
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(1)->UseManualTime();
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(1)->MeasureProcessCPUTime();
-BENCHMARK(BM_WorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime()
-    ->UseRealTime();
-BENCHMARK(BM_WorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime()
-    ->UseManualTime();
-
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(2);
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(2)->UseRealTime();
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(2)->UseManualTime();
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(2)->MeasureProcessCPUTime();
-BENCHMARK(BM_WorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime()
-    ->UseRealTime();
-BENCHMARK(BM_WorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime()
-    ->UseManualTime();
-
-// ========================================================================= //
-// BM_MainThreadAndWorkerThread
-
-void BM_MainThreadAndWorkerThread(benchmark::State& state) {
-  for (auto _ : state) {
-    std::thread Worker(&MyBusySpinwait);
-    MyBusySpinwait();
-    Worker.join();
-    state.SetIterationTime(time_frame_in_sec);
-  }
-  state.counters["invtime"] =
-      benchmark::Counter{1, benchmark::Counter::kIsRate};
-}
-
-BENCHMARK(BM_MainThreadAndWorkerThread)->Iterations(1)->Threads(1);
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->UseRealTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->UseManualTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime()
-    ->UseRealTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime()
-    ->UseManualTime();
-
-BENCHMARK(BM_MainThreadAndWorkerThread)->Iterations(1)->Threads(2);
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->UseRealTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->UseManualTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime()
-    ->UseRealTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime()
-    ->UseManualTime();
-
-// ========================================================================= //
-// ---------------------------- TEST CASES END ----------------------------- //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/test/link_main_test.cc b/3rdparty/benchmark/test/link_main_test.cc
deleted file mode 100644
index 241ad5c3..00000000
--- a/3rdparty/benchmark/test/link_main_test.cc
+++ /dev/null
@@ -1,8 +0,0 @@
-#include "benchmark/benchmark.h"
-
-void BM_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-}
-BENCHMARK(BM_empty);
diff --git a/3rdparty/benchmark/test/map_test.cc b/3rdparty/benchmark/test/map_test.cc
deleted file mode 100644
index 50961345..00000000
--- a/3rdparty/benchmark/test/map_test.cc
+++ /dev/null
@@ -1,57 +0,0 @@
-#include <cstdlib>
-#include <map>
-
-#include "benchmark/benchmark.h"
-
-namespace {
-
-std::map<int, int> ConstructRandomMap(int size) {
-  std::map<int, int> m;
-  for (int i = 0; i < size; ++i) {
-    m.insert(std::make_pair(std::rand() % size, std::rand() % size));
-  }
-  return m;
-}
-
-}  // namespace
-
-// Basic version.
-static void BM_MapLookup(benchmark::State& state) {
-  const int size = static_cast<int>(state.range(0));
-  std::map<int, int> m;
-  for (auto _ : state) {
-    state.PauseTiming();
-    m = ConstructRandomMap(size);
-    state.ResumeTiming();
-    for (int i = 0; i < size; ++i) {
-      benchmark::DoNotOptimize(m.find(std::rand() % size));
-    }
-  }
-  state.SetItemsProcessed(state.iterations() * size);
-}
-BENCHMARK(BM_MapLookup)->Range(1 << 3, 1 << 12);
-
-// Using fixtures.
-class MapFixture : public ::benchmark::Fixture {
- public:
-  void SetUp(const ::benchmark::State& st) BENCHMARK_OVERRIDE {
-    m = ConstructRandomMap(static_cast<int>(st.range(0)));
-  }
-
-  void TearDown(const ::benchmark::State&) BENCHMARK_OVERRIDE { m.clear(); }
-
-  std::map<int, int> m;
-};
-
-BENCHMARK_DEFINE_F(MapFixture, Lookup)(benchmark::State& state) {
-  const int size = static_cast<int>(state.range(0));
-  for (auto _ : state) {
-    for (int i = 0; i < size; ++i) {
-      benchmark::DoNotOptimize(m.find(std::rand() % size));
-    }
-  }
-  state.SetItemsProcessed(state.iterations() * size);
-}
-BENCHMARK_REGISTER_F(MapFixture, Lookup)->Range(1 << 3, 1 << 12);
-
-BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/memory_manager_test.cc b/3rdparty/benchmark/test/memory_manager_test.cc
deleted file mode 100644
index f0c192fc..00000000
--- a/3rdparty/benchmark/test/memory_manager_test.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-#include <memory>
-
-#include "../src/check.h"
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-class TestMemoryManager : public benchmark::MemoryManager {
-  void Start() BENCHMARK_OVERRIDE {}
-  void Stop(Result* result) BENCHMARK_OVERRIDE {
-    result->num_allocs = 42;
-    result->max_bytes_used = 42000;
-  }
-};
-
-void BM_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-}
-BENCHMARK(BM_empty);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_empty %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_empty\",$"},
-                       {"\"family_index\": 0,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_empty\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"allocs_per_iter\": %float,$", MR_Next},
-                       {"\"max_bytes_used\": 42000$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_empty\",%csv_report$"}});
-
-int main(int argc, char* argv[]) {
-  std::unique_ptr<benchmark::MemoryManager> mm(new TestMemoryManager());
-
-  benchmark::RegisterMemoryManager(mm.get());
-  RunOutputTests(argc, argv);
-  benchmark::RegisterMemoryManager(nullptr);
-}
diff --git a/3rdparty/benchmark/test/multiple_ranges_test.cc b/3rdparty/benchmark/test/multiple_ranges_test.cc
deleted file mode 100644
index 7618c4da..00000000
--- a/3rdparty/benchmark/test/multiple_ranges_test.cc
+++ /dev/null
@@ -1,96 +0,0 @@
-#include <cassert>
-#include <iostream>
-#include <set>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-
-class MultipleRangesFixture : public ::benchmark::Fixture {
- public:
-  MultipleRangesFixture()
-      : expectedValues({{1, 3, 5},
-                        {1, 3, 8},
-                        {1, 3, 15},
-                        {2, 3, 5},
-                        {2, 3, 8},
-                        {2, 3, 15},
-                        {1, 4, 5},
-                        {1, 4, 8},
-                        {1, 4, 15},
-                        {2, 4, 5},
-                        {2, 4, 8},
-                        {2, 4, 15},
-                        {1, 7, 5},
-                        {1, 7, 8},
-                        {1, 7, 15},
-                        {2, 7, 5},
-                        {2, 7, 8},
-                        {2, 7, 15},
-                        {7, 6, 3}}) {}
-
-  void SetUp(const ::benchmark::State& state) BENCHMARK_OVERRIDE {
-    std::vector<int64_t> ranges = {state.range(0), state.range(1),
-                                   state.range(2)};
-
-    assert(expectedValues.find(ranges) != expectedValues.end());
-
-    actualValues.insert(ranges);
-  }
-
-  // NOTE: This is not TearDown as we want to check after _all_ runs are
-  // complete.
-  virtual ~MultipleRangesFixture() {
-    if (actualValues != expectedValues) {
-      std::cout << "EXPECTED\n";
-      for (const auto& v : expectedValues) {
-        std::cout << "{";
-        for (int64_t iv : v) {
-          std::cout << iv << ", ";
-        }
-        std::cout << "}\n";
-      }
-      std::cout << "ACTUAL\n";
-      for (const auto& v : actualValues) {
-        std::cout << "{";
-        for (int64_t iv : v) {
-          std::cout << iv << ", ";
-        }
-        std::cout << "}\n";
-      }
-    }
-  }
-
-  std::set<std::vector<int64_t>> expectedValues;
-  std::set<std::vector<int64_t>> actualValues;
-};
-
-BENCHMARK_DEFINE_F(MultipleRangesFixture, Empty)(benchmark::State& state) {
-  for (auto _ : state) {
-    int64_t product = state.range(0) * state.range(1) * state.range(2);
-    for (int64_t x = 0; x < product; x++) {
-      benchmark::DoNotOptimize(x);
-    }
-  }
-}
-
-BENCHMARK_REGISTER_F(MultipleRangesFixture, Empty)
-    ->RangeMultiplier(2)
-    ->Ranges({{1, 2}, {3, 7}, {5, 15}})
-    ->Args({7, 6, 3});
-
-void BM_CheckDefaultArgument(benchmark::State& state) {
-  // Test that the 'range()' without an argument is the same as 'range(0)'.
-  assert(state.range() == state.range(0));
-  assert(state.range() != state.range(1));
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_CheckDefaultArgument)->Ranges({{1, 5}, {6, 10}});
-
-static void BM_MultipleRanges(benchmark::State& st) {
-  for (auto _ : st) {
-  }
-}
-BENCHMARK(BM_MultipleRanges)->Ranges({{5, 5}, {6, 6}});
-
-BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/options_test.cc b/3rdparty/benchmark/test/options_test.cc
deleted file mode 100644
index d424d40b..00000000
--- a/3rdparty/benchmark/test/options_test.cc
+++ /dev/null
@@ -1,75 +0,0 @@
-#include <chrono>
-#include <thread>
-
-#include "benchmark/benchmark.h"
-
-#if defined(NDEBUG)
-#undef NDEBUG
-#endif
-#include <cassert>
-
-void BM_basic(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-
-void BM_basic_slow(benchmark::State& state) {
-  std::chrono::milliseconds sleep_duration(state.range(0));
-  for (auto _ : state) {
-    std::this_thread::sleep_for(
-        std::chrono::duration_cast<std::chrono::nanoseconds>(sleep_duration));
-  }
-}
-
-BENCHMARK(BM_basic);
-BENCHMARK(BM_basic)->Arg(42);
-BENCHMARK(BM_basic_slow)->Arg(10)->Unit(benchmark::kNanosecond);
-BENCHMARK(BM_basic_slow)->Arg(100)->Unit(benchmark::kMicrosecond);
-BENCHMARK(BM_basic_slow)->Arg(1000)->Unit(benchmark::kMillisecond);
-BENCHMARK(BM_basic_slow)->Arg(1000)->Unit(benchmark::kSecond);
-BENCHMARK(BM_basic)->Range(1, 8);
-BENCHMARK(BM_basic)->RangeMultiplier(2)->Range(1, 8);
-BENCHMARK(BM_basic)->DenseRange(10, 15);
-BENCHMARK(BM_basic)->Args({42, 42});
-BENCHMARK(BM_basic)->Ranges({{64, 512}, {64, 512}});
-BENCHMARK(BM_basic)->MinTime(0.7);
-BENCHMARK(BM_basic)->UseRealTime();
-BENCHMARK(BM_basic)->ThreadRange(2, 4);
-BENCHMARK(BM_basic)->ThreadPerCpu();
-BENCHMARK(BM_basic)->Repetitions(3);
-BENCHMARK(BM_basic)
-    ->RangeMultiplier(std::numeric_limits<int>::max())
-    ->Range(std::numeric_limits<int64_t>::min(),
-            std::numeric_limits<int64_t>::max());
-
-// Negative ranges
-BENCHMARK(BM_basic)->Range(-64, -1);
-BENCHMARK(BM_basic)->RangeMultiplier(4)->Range(-8, 8);
-BENCHMARK(BM_basic)->DenseRange(-2, 2, 1);
-BENCHMARK(BM_basic)->Ranges({{-64, 1}, {-8, -1}});
-
-void CustomArgs(benchmark::internal::Benchmark* b) {
-  for (int i = 0; i < 10; ++i) {
-    b->Arg(i);
-  }
-}
-
-BENCHMARK(BM_basic)->Apply(CustomArgs);
-
-void BM_explicit_iteration_count(benchmark::State& state) {
-  // Test that benchmarks specified with an explicit iteration count are
-  // only run once.
-  static bool invoked_before = false;
-  assert(!invoked_before);
-  invoked_before = true;
-
-  // Test that the requested iteration count is respected.
-  assert(state.max_iterations == 42);
-  size_t actual_iterations = 0;
-  for (auto _ : state) ++actual_iterations;
-  assert(state.iterations() == state.max_iterations);
-  assert(state.iterations() == 42);
-}
-BENCHMARK(BM_explicit_iteration_count)->Iterations(42);
-
-BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/output_test.h b/3rdparty/benchmark/test/output_test.h
deleted file mode 100644
index c6ff8ef2..00000000
--- a/3rdparty/benchmark/test/output_test.h
+++ /dev/null
@@ -1,211 +0,0 @@
-#ifndef TEST_OUTPUT_TEST_H
-#define TEST_OUTPUT_TEST_H
-
-#undef NDEBUG
-#include <functional>
-#include <initializer_list>
-#include <memory>
-#include <sstream>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "../src/re.h"
-#include "benchmark/benchmark.h"
-
-#define CONCAT2(x, y) x##y
-#define CONCAT(x, y) CONCAT2(x, y)
-
-#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = ::AddCases(__VA_ARGS__)
-
-#define SET_SUBSTITUTIONS(...) \
-  int CONCAT(dummy, __LINE__) = ::SetSubstitutions(__VA_ARGS__)
-
-enum MatchRules {
-  MR_Default,  // Skip non-matching lines until a match is found.
-  MR_Next,     // Match must occur on the next line.
-  MR_Not  // No line between the current position and the next match matches
-          // the regex
-};
-
-struct TestCase {
-  TestCase(std::string re, int rule = MR_Default);
-
-  std::string regex_str;
-  int match_rule;
-  std::string substituted_regex;
-  std::shared_ptr<benchmark::Regex> regex;
-};
-
-enum TestCaseID {
-  TC_ConsoleOut,
-  TC_ConsoleErr,
-  TC_JSONOut,
-  TC_JSONErr,
-  TC_CSVOut,
-  TC_CSVErr,
-
-  TC_NumID  // PRIVATE
-};
-
-// Add a list of test cases to be run against the output specified by
-// 'ID'
-int AddCases(TestCaseID ID, std::initializer_list<TestCase> il);
-
-// Add or set a list of substitutions to be performed on constructed regex's
-// See 'output_test_helper.cc' for a list of default substitutions.
-int SetSubstitutions(
-    std::initializer_list<std::pair<std::string, std::string>> il);
-
-// Run all output tests.
-void RunOutputTests(int argc, char* argv[]);
-
-// Count the number of 'pat' substrings in the 'haystack' string.
-int SubstrCnt(const std::string& haystack, const std::string& pat);
-
-// Run registered benchmarks with file reporter enabled, and return the content
-// outputted by the file reporter.
-std::string GetFileReporterOutput(int argc, char* argv[]);
-
-// ========================================================================= //
-// ------------------------- Results checking ------------------------------ //
-// ========================================================================= //
-
-// Call this macro to register a benchmark for checking its results. This
-// should be all that's needed. It subscribes a function to check the (CSV)
-// results of a benchmark. This is done only after verifying that the output
-// strings are really as expected.
-// bm_name_pattern: a name or a regex pattern which will be matched against
-//                  all the benchmark names. Matching benchmarks
-//                  will be the subject of a call to checker_function
-// checker_function: should be of type ResultsCheckFn (see below)
-#define CHECK_BENCHMARK_RESULTS(bm_name_pattern, checker_function) \
-  size_t CONCAT(dummy, __LINE__) = AddChecker(bm_name_pattern, checker_function)
-
-struct Results;
-typedef std::function<void(Results const&)> ResultsCheckFn;
-
-size_t AddChecker(const char* bm_name_pattern, const ResultsCheckFn& fn);
-
-// Class holding the results of a benchmark.
-// It is passed in calls to checker functions.
-struct Results {
-  // the benchmark name
-  std::string name;
-  // the benchmark fields
-  std::map<std::string, std::string> values;
-
-  Results(const std::string& n) : name(n) {}
-
-  int NumThreads() const;
-
-  double NumIterations() const;
-
-  typedef enum { kCpuTime, kRealTime } BenchmarkTime;
-
-  // get cpu_time or real_time in seconds
-  double GetTime(BenchmarkTime which) const;
-
-  // get the real_time duration of the benchmark in seconds.
-  // it is better to use fuzzy float checks for this, as the float
-  // ASCII formatting is lossy.
-  double DurationRealTime() const {
-    return NumIterations() * GetTime(kRealTime);
-  }
-  // get the cpu_time duration of the benchmark in seconds
-  double DurationCPUTime() const { return NumIterations() * GetTime(kCpuTime); }
-
-  // get the string for a result by name, or nullptr if the name
-  // is not found
-  const std::string* Get(const char* entry_name) const {
-    auto it = values.find(entry_name);
-    if (it == values.end()) return nullptr;
-    return &it->second;
-  }
-
-  // get a result by name, parsed as a specific type.
-  // NOTE: for counters, use GetCounterAs instead.
-  template <class T>
-  T GetAs(const char* entry_name) const;
-
-  // counters are written as doubles, so they have to be read first
-  // as a double, and only then converted to the asked type.
-  template <class T>
-  T GetCounterAs(const char* entry_name) const {
-    double dval = GetAs<double>(entry_name);
-    T tval = static_cast<T>(dval);
-    return tval;
-  }
-};
-
-template <class T>
-T Results::GetAs(const char* entry_name) const {
-  auto* sv = Get(entry_name);
-  BM_CHECK(sv != nullptr && !sv->empty());
-  std::stringstream ss;
-  ss << *sv;
-  T out;
-  ss >> out;
-  BM_CHECK(!ss.fail());
-  return out;
-}
-
-//----------------------------------
-// Macros to help in result checking. Do not use them with arguments causing
-// side-effects.
-
-// clang-format off
-
-#define CHECK_RESULT_VALUE_IMPL(entry, getfn, var_type, var_name, relationship, value) \
-    CONCAT(BM_CHECK_, relationship)                                        \
-    (entry.getfn< var_type >(var_name), (value)) << "\n"                \
-    << __FILE__ << ":" << __LINE__ << ": " << (entry).name << ":\n"     \
-    << __FILE__ << ":" << __LINE__ << ": "                              \
-    << "expected (" << #var_type << ")" << (var_name)                   \
-    << "=" << (entry).getfn< var_type >(var_name)                       \
-    << " to be " #relationship " to " << (value) << "\n"
-
-// check with tolerance. eps_factor is the tolerance window, which is
-// interpreted relative to value (eg, 0.1 means 10% of value).
-#define CHECK_FLOAT_RESULT_VALUE_IMPL(entry, getfn, var_type, var_name, relationship, value, eps_factor) \
-    CONCAT(BM_CHECK_FLOAT_, relationship)                                  \
-    (entry.getfn< var_type >(var_name), (value), (eps_factor) * (value)) << "\n" \
-    << __FILE__ << ":" << __LINE__ << ": " << (entry).name << ":\n"     \
-    << __FILE__ << ":" << __LINE__ << ": "                              \
-    << "expected (" << #var_type << ")" << (var_name)                   \
-    << "=" << (entry).getfn< var_type >(var_name)                       \
-    << " to be " #relationship " to " << (value) << "\n"                \
-    << __FILE__ << ":" << __LINE__ << ": "                              \
-    << "with tolerance of " << (eps_factor) * (value)                   \
-    << " (" << (eps_factor)*100. << "%), "                              \
-    << "but delta was " << ((entry).getfn< var_type >(var_name) - (value)) \
-    << " (" << (((entry).getfn< var_type >(var_name) - (value))         \
-               /                                                        \
-               ((value) > 1.e-5 || value < -1.e-5 ? value : 1.e-5)*100.) \
-    << "%)"
-
-#define CHECK_RESULT_VALUE(entry, var_type, var_name, relationship, value) \
-    CHECK_RESULT_VALUE_IMPL(entry, GetAs, var_type, var_name, relationship, value)
-
-#define CHECK_COUNTER_VALUE(entry, var_type, var_name, relationship, value) \
-    CHECK_RESULT_VALUE_IMPL(entry, GetCounterAs, var_type, var_name, relationship, value)
-
-#define CHECK_FLOAT_RESULT_VALUE(entry, var_name, relationship, value, eps_factor) \
-    CHECK_FLOAT_RESULT_VALUE_IMPL(entry, GetAs, double, var_name, relationship, value, eps_factor)
-
-#define CHECK_FLOAT_COUNTER_VALUE(entry, var_name, relationship, value, eps_factor) \
-    CHECK_FLOAT_RESULT_VALUE_IMPL(entry, GetCounterAs, double, var_name, relationship, value, eps_factor)
-
-// clang-format on
-
-// ========================================================================= //
-// --------------------------- Misc Utilities ------------------------------ //
-// ========================================================================= //
-
-namespace {
-
-const char* const dec_re = "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?";
-
-}  //  end namespace
-
-#endif  // TEST_OUTPUT_TEST_H
diff --git a/3rdparty/benchmark/test/output_test_helper.cc b/3rdparty/benchmark/test/output_test_helper.cc
deleted file mode 100644
index 81584cbf..00000000
--- a/3rdparty/benchmark/test/output_test_helper.cc
+++ /dev/null
@@ -1,517 +0,0 @@
-#include <cstdio>
-#include <cstring>
-#include <fstream>
-#include <iostream>
-#include <map>
-#include <memory>
-#include <random>
-#include <sstream>
-#include <streambuf>
-
-#include "../src/benchmark_api_internal.h"
-#include "../src/check.h"  // NOTE: check.h is for internal use only!
-#include "../src/log.h"    // NOTE: log.h is for internal use only
-#include "../src/re.h"     // NOTE: re.h is for internal use only
-#include "output_test.h"
-
-// ========================================================================= //
-// ------------------------------ Internals -------------------------------- //
-// ========================================================================= //
-namespace internal {
-namespace {
-
-using TestCaseList = std::vector<TestCase>;
-
-// Use a vector because the order elements are added matters during iteration.
-// std::map/unordered_map don't guarantee that.
-// For example:
-//  SetSubstitutions({{"%HelloWorld", "Hello"}, {"%Hello", "Hi"}});
-//     Substitute("%HelloWorld") // Always expands to Hello.
-using SubMap = std::vector<std::pair<std::string, std::string>>;
-
-TestCaseList& GetTestCaseList(TestCaseID ID) {
-  // Uses function-local statics to ensure initialization occurs
-  // before first use.
-  static TestCaseList lists[TC_NumID];
-  return lists[ID];
-}
-
-SubMap& GetSubstitutions() {
-  // Don't use 'dec_re' from header because it may not yet be initialized.
-  // clang-format off
-  static std::string safe_dec_re = "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?";
-  static std::string time_re = "([0-9]+[.])?[0-9]+";
-  static std::string percentage_re = "[0-9]+[.][0-9]{2}";
-  static SubMap map = {
-      {"%float", "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?"},
-      // human-readable float
-      {"%hrfloat", "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?[kMGTPEZYmunpfazy]?"},
-      {"%percentage", percentage_re},
-      {"%int", "[ ]*[0-9]+"},
-      {" %s ", "[ ]+"},
-      {"%time", "[ ]*" + time_re + "[ ]+ns"},
-      {"%console_report", "[ ]*" + time_re + "[ ]+ns [ ]*" + time_re + "[ ]+ns [ ]*[0-9]+"},
-      {"%console_percentage_report", "[ ]*" + percentage_re + "[ ]+% [ ]*" + percentage_re + "[ ]+% [ ]*[0-9]+"},
-      {"%console_us_report", "[ ]*" + time_re + "[ ]+us [ ]*" + time_re + "[ ]+us [ ]*[0-9]+"},
-      {"%console_ms_report", "[ ]*" + time_re + "[ ]+ms [ ]*" + time_re + "[ ]+ms [ ]*[0-9]+"},
-      {"%console_s_report", "[ ]*" + time_re + "[ ]+s [ ]*" + time_re + "[ ]+s [ ]*[0-9]+"},
-      {"%console_time_only_report", "[ ]*" + time_re + "[ ]+ns [ ]*" + time_re + "[ ]+ns"},
-      {"%console_us_report", "[ ]*" + time_re + "[ ]+us [ ]*" + time_re + "[ ]+us [ ]*[0-9]+"},
-      {"%console_us_time_only_report", "[ ]*" + time_re + "[ ]+us [ ]*" + time_re + "[ ]+us"},
-      {"%csv_header",
-       "name,iterations,real_time,cpu_time,time_unit,bytes_per_second,"
-       "items_per_second,label,error_occurred,error_message"},
-      {"%csv_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,,,,,"},
-      {"%csv_us_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",us,,,,,"},
-      {"%csv_ms_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ms,,,,,"},
-      {"%csv_s_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",s,,,,,"},
-      {"%csv_bytes_report",
-       "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns," + safe_dec_re + ",,,,"},
-      {"%csv_items_report",
-       "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,," + safe_dec_re + ",,,"},
-      {"%csv_bytes_items_report",
-       "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns," + safe_dec_re +
-       "," + safe_dec_re + ",,,"},
-      {"%csv_label_report_begin", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,,,"},
-      {"%csv_label_report_end", ",,"}};
-  // clang-format on
-  return map;
-}
-
-std::string PerformSubstitutions(std::string source) {
-  SubMap const& subs = GetSubstitutions();
-  using SizeT = std::string::size_type;
-  for (auto const& KV : subs) {
-    SizeT pos;
-    SizeT next_start = 0;
-    while ((pos = source.find(KV.first, next_start)) != std::string::npos) {
-      next_start = pos + KV.second.size();
-      source.replace(pos, KV.first.size(), KV.second);
-    }
-  }
-  return source;
-}
-
-void CheckCase(std::stringstream& remaining_output, TestCase const& TC,
-               TestCaseList const& not_checks) {
-  std::string first_line;
-  bool on_first = true;
-  std::string line;
-  while (remaining_output.eof() == false) {
-    BM_CHECK(remaining_output.good());
-    std::getline(remaining_output, line);
-    if (on_first) {
-      first_line = line;
-      on_first = false;
-    }
-    for (const auto& NC : not_checks) {
-      BM_CHECK(!NC.regex->Match(line))
-          << "Unexpected match for line \"" << line << "\" for MR_Not regex \""
-          << NC.regex_str << "\""
-          << "\n    actual regex string \"" << TC.substituted_regex << "\""
-          << "\n    started matching near: " << first_line;
-    }
-    if (TC.regex->Match(line)) return;
-    BM_CHECK(TC.match_rule != MR_Next)
-        << "Expected line \"" << line << "\" to match regex \"" << TC.regex_str
-        << "\""
-        << "\n    actual regex string \"" << TC.substituted_regex << "\""
-        << "\n    started matching near: " << first_line;
-  }
-  BM_CHECK(remaining_output.eof() == false)
-      << "End of output reached before match for regex \"" << TC.regex_str
-      << "\" was found"
-      << "\n    actual regex string \"" << TC.substituted_regex << "\""
-      << "\n    started matching near: " << first_line;
-}
-
-void CheckCases(TestCaseList const& checks, std::stringstream& output) {
-  std::vector<TestCase> not_checks;
-  for (size_t i = 0; i < checks.size(); ++i) {
-    const auto& TC = checks[i];
-    if (TC.match_rule == MR_Not) {
-      not_checks.push_back(TC);
-      continue;
-    }
-    CheckCase(output, TC, not_checks);
-    not_checks.clear();
-  }
-}
-
-class TestReporter : public benchmark::BenchmarkReporter {
- public:
-  TestReporter(std::vector<benchmark::BenchmarkReporter*> reps)
-      : reporters_(std::move(reps)) {}
-
-  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE {
-    bool last_ret = false;
-    bool first = true;
-    for (auto rep : reporters_) {
-      bool new_ret = rep->ReportContext(context);
-      BM_CHECK(first || new_ret == last_ret)
-          << "Reports return different values for ReportContext";
-      first = false;
-      last_ret = new_ret;
-    }
-    (void)first;
-    return last_ret;
-  }
-
-  void ReportRuns(const std::vector<Run>& report) BENCHMARK_OVERRIDE {
-    for (auto rep : reporters_) rep->ReportRuns(report);
-  }
-  void Finalize() BENCHMARK_OVERRIDE {
-    for (auto rep : reporters_) rep->Finalize();
-  }
-
- private:
-  std::vector<benchmark::BenchmarkReporter*> reporters_;
-};
-}  // namespace
-
-}  // end namespace internal
-
-// ========================================================================= //
-// -------------------------- Results checking ----------------------------- //
-// ========================================================================= //
-
-namespace internal {
-
-// Utility class to manage subscribers for checking benchmark results.
-// It works by parsing the CSV output to read the results.
-class ResultsChecker {
- public:
-  struct PatternAndFn : public TestCase {  // reusing TestCase for its regexes
-    PatternAndFn(const std::string& rx, ResultsCheckFn fn_)
-        : TestCase(rx), fn(std::move(fn_)) {}
-    ResultsCheckFn fn;
-  };
-
-  std::vector<PatternAndFn> check_patterns;
-  std::vector<Results> results;
-  std::vector<std::string> field_names;
-
-  void Add(const std::string& entry_pattern, const ResultsCheckFn& fn);
-
-  void CheckResults(std::stringstream& output);
-
- private:
-  void SetHeader_(const std::string& csv_header);
-  void SetValues_(const std::string& entry_csv_line);
-
-  std::vector<std::string> SplitCsv_(const std::string& line);
-};
-
-// store the static ResultsChecker in a function to prevent initialization
-// order problems
-ResultsChecker& GetResultsChecker() {
-  static ResultsChecker rc;
-  return rc;
-}
-
-// add a results checker for a benchmark
-void ResultsChecker::Add(const std::string& entry_pattern,
-                         const ResultsCheckFn& fn) {
-  check_patterns.emplace_back(entry_pattern, fn);
-}
-
-// check the results of all subscribed benchmarks
-void ResultsChecker::CheckResults(std::stringstream& output) {
-  // first reset the stream to the start
-  {
-    auto start = std::stringstream::pos_type(0);
-    // clear before calling tellg()
-    output.clear();
-    // seek to zero only when needed
-    if (output.tellg() > start) output.seekg(start);
-    // and just in case
-    output.clear();
-  }
-  // now go over every line and publish it to the ResultsChecker
-  std::string line;
-  bool on_first = true;
-  while (output.eof() == false) {
-    BM_CHECK(output.good());
-    std::getline(output, line);
-    if (on_first) {
-      SetHeader_(line);  // this is important
-      on_first = false;
-      continue;
-    }
-    SetValues_(line);
-  }
-  // finally we can call the subscribed check functions
-  for (const auto& p : check_patterns) {
-    BM_VLOG(2) << "--------------------------------\n";
-    BM_VLOG(2) << "checking for benchmarks matching " << p.regex_str << "...\n";
-    for (const auto& r : results) {
-      if (!p.regex->Match(r.name)) {
-        BM_VLOG(2) << p.regex_str << " is not matched by " << r.name << "\n";
-        continue;
-      } else {
-        BM_VLOG(2) << p.regex_str << " is matched by " << r.name << "\n";
-      }
-      BM_VLOG(1) << "Checking results of " << r.name << ": ... \n";
-      p.fn(r);
-      BM_VLOG(1) << "Checking results of " << r.name << ": OK.\n";
-    }
-  }
-}
-
-// prepare for the names in this header
-void ResultsChecker::SetHeader_(const std::string& csv_header) {
-  field_names = SplitCsv_(csv_header);
-}
-
-// set the values for a benchmark
-void ResultsChecker::SetValues_(const std::string& entry_csv_line) {
-  if (entry_csv_line.empty()) return;  // some lines are empty
-  BM_CHECK(!field_names.empty());
-  auto vals = SplitCsv_(entry_csv_line);
-  BM_CHECK_EQ(vals.size(), field_names.size());
-  results.emplace_back(vals[0]);  // vals[0] is the benchmark name
-  auto& entry = results.back();
-  for (size_t i = 1, e = vals.size(); i < e; ++i) {
-    entry.values[field_names[i]] = vals[i];
-  }
-}
-
-// a quick'n'dirty csv splitter (eliminating quotes)
-std::vector<std::string> ResultsChecker::SplitCsv_(const std::string& line) {
-  std::vector<std::string> out;
-  if (line.empty()) return out;
-  if (!field_names.empty()) out.reserve(field_names.size());
-  size_t prev = 0, pos = line.find_first_of(','), curr = pos;
-  while (pos != line.npos) {
-    BM_CHECK(curr > 0);
-    if (line[prev] == '"') ++prev;
-    if (line[curr - 1] == '"') --curr;
-    out.push_back(line.substr(prev, curr - prev));
-    prev = pos + 1;
-    pos = line.find_first_of(',', pos + 1);
-    curr = pos;
-  }
-  curr = line.size();
-  if (line[prev] == '"') ++prev;
-  if (line[curr - 1] == '"') --curr;
-  out.push_back(line.substr(prev, curr - prev));
-  return out;
-}
-
-}  // end namespace internal
-
-size_t AddChecker(const char* bm_name, const ResultsCheckFn& fn) {
-  auto& rc = internal::GetResultsChecker();
-  rc.Add(bm_name, fn);
-  return rc.results.size();
-}
-
-int Results::NumThreads() const {
-  auto pos = name.find("/threads:");
-  if (pos == name.npos) return 1;
-  auto end = name.find('/', pos + 9);
-  std::stringstream ss;
-  ss << name.substr(pos + 9, end);
-  int num = 1;
-  ss >> num;
-  BM_CHECK(!ss.fail());
-  return num;
-}
-
-double Results::NumIterations() const { return GetAs<double>("iterations"); }
-
-double Results::GetTime(BenchmarkTime which) const {
-  BM_CHECK(which == kCpuTime || which == kRealTime);
-  const char* which_str = which == kCpuTime ? "cpu_time" : "real_time";
-  double val = GetAs<double>(which_str);
-  auto unit = Get("time_unit");
-  BM_CHECK(unit);
-  if (*unit == "ns") {
-    return val * 1.e-9;
-  } else if (*unit == "us") {
-    return val * 1.e-6;
-  } else if (*unit == "ms") {
-    return val * 1.e-3;
-  } else if (*unit == "s") {
-    return val;
-  } else {
-    BM_CHECK(1 == 0) << "unknown time unit: " << *unit;
-    return 0;
-  }
-}
-
-// ========================================================================= //
-// -------------------------- Public API Definitions------------------------ //
-// ========================================================================= //
-
-TestCase::TestCase(std::string re, int rule)
-    : regex_str(std::move(re)),
-      match_rule(rule),
-      substituted_regex(internal::PerformSubstitutions(regex_str)),
-      regex(std::make_shared<benchmark::Regex>()) {
-  std::string err_str;
-  regex->Init(substituted_regex, &err_str);
-  BM_CHECK(err_str.empty())
-      << "Could not construct regex \"" << substituted_regex << "\""
-      << "\n    originally \"" << regex_str << "\""
-      << "\n    got error: " << err_str;
-}
-
-int AddCases(TestCaseID ID, std::initializer_list<TestCase> il) {
-  auto& L = internal::GetTestCaseList(ID);
-  L.insert(L.end(), il);
-  return 0;
-}
-
-int SetSubstitutions(
-    std::initializer_list<std::pair<std::string, std::string>> il) {
-  auto& subs = internal::GetSubstitutions();
-  for (auto KV : il) {
-    bool exists = false;
-    KV.second = internal::PerformSubstitutions(KV.second);
-    for (auto& EKV : subs) {
-      if (EKV.first == KV.first) {
-        EKV.second = std::move(KV.second);
-        exists = true;
-        break;
-      }
-    }
-    if (!exists) subs.push_back(std::move(KV));
-  }
-  return 0;
-}
-
-// Disable deprecated warnings temporarily because we need to reference
-// CSVReporter but don't want to trigger -Werror=-Wdeprecated-declarations
-BENCHMARK_DISABLE_DEPRECATED_WARNING
-
-void RunOutputTests(int argc, char* argv[]) {
-  using internal::GetTestCaseList;
-  benchmark::Initialize(&argc, argv);
-  auto options = benchmark::internal::GetOutputOptions(/*force_no_color*/ true);
-  benchmark::ConsoleReporter CR(options);
-  benchmark::JSONReporter JR;
-  benchmark::CSVReporter CSVR;
-  struct ReporterTest {
-    const char* name;
-    std::vector<TestCase>& output_cases;
-    std::vector<TestCase>& error_cases;
-    benchmark::BenchmarkReporter& reporter;
-    std::stringstream out_stream;
-    std::stringstream err_stream;
-
-    ReporterTest(const char* n, std::vector<TestCase>& out_tc,
-                 std::vector<TestCase>& err_tc,
-                 benchmark::BenchmarkReporter& br)
-        : name(n), output_cases(out_tc), error_cases(err_tc), reporter(br) {
-      reporter.SetOutputStream(&out_stream);
-      reporter.SetErrorStream(&err_stream);
-    }
-  } TestCases[] = {
-      {"ConsoleReporter", GetTestCaseList(TC_ConsoleOut),
-       GetTestCaseList(TC_ConsoleErr), CR},
-      {"JSONReporter", GetTestCaseList(TC_JSONOut), GetTestCaseList(TC_JSONErr),
-       JR},
-      {"CSVReporter", GetTestCaseList(TC_CSVOut), GetTestCaseList(TC_CSVErr),
-       CSVR},
-  };
-
-  // Create the test reporter and run the benchmarks.
-  std::cout << "Running benchmarks...\n";
-  internal::TestReporter test_rep({&CR, &JR, &CSVR});
-  benchmark::RunSpecifiedBenchmarks(&test_rep);
-
-  for (auto& rep_test : TestCases) {
-    std::string msg = std::string("\nTesting ") + rep_test.name + " Output\n";
-    std::string banner(msg.size() - 1, '-');
-    std::cout << banner << msg << banner << "\n";
-
-    std::cerr << rep_test.err_stream.str();
-    std::cout << rep_test.out_stream.str();
-
-    internal::CheckCases(rep_test.error_cases, rep_test.err_stream);
-    internal::CheckCases(rep_test.output_cases, rep_test.out_stream);
-
-    std::cout << "\n";
-  }
-
-  // now that we know the output is as expected, we can dispatch
-  // the checks to subscribees.
-  auto& csv = TestCases[2];
-  // would use == but gcc spits a warning
-  BM_CHECK(std::strcmp(csv.name, "CSVReporter") == 0);
-  internal::GetResultsChecker().CheckResults(csv.out_stream);
-}
-
-BENCHMARK_RESTORE_DEPRECATED_WARNING
-
-int SubstrCnt(const std::string& haystack, const std::string& pat) {
-  if (pat.length() == 0) return 0;
-  int count = 0;
-  for (size_t offset = haystack.find(pat); offset != std::string::npos;
-       offset = haystack.find(pat, offset + pat.length()))
-    ++count;
-  return count;
-}
-
-static char ToHex(int ch) {
-  return ch < 10 ? static_cast<char>('0' + ch)
-                 : static_cast<char>('a' + (ch - 10));
-}
-
-static char RandomHexChar() {
-  static std::mt19937 rd{std::random_device{}()};
-  static std::uniform_int_distribution<int> mrand{0, 15};
-  return ToHex(mrand(rd));
-}
-
-static std::string GetRandomFileName() {
-  std::string model = "test.%%%%%%";
-  for (auto& ch : model) {
-    if (ch == '%') ch = RandomHexChar();
-  }
-  return model;
-}
-
-static bool FileExists(std::string const& name) {
-  std::ifstream in(name.c_str());
-  return in.good();
-}
-
-static std::string GetTempFileName() {
-  // This function attempts to avoid race conditions where two tests
-  // create the same file at the same time. However, it still introduces races
-  // similar to tmpnam.
-  int retries = 3;
-  while (--retries) {
-    std::string name = GetRandomFileName();
-    if (!FileExists(name)) return name;
-  }
-  std::cerr << "Failed to create unique temporary file name" << std::endl;
-  std::abort();
-}
-
-std::string GetFileReporterOutput(int argc, char* argv[]) {
-  std::vector<char*> new_argv(argv, argv + argc);
-  assert(static_cast<decltype(new_argv)::size_type>(argc) == new_argv.size());
-
-  std::string tmp_file_name = GetTempFileName();
-  std::cout << "Will be using this as the tmp file: " << tmp_file_name << '\n';
-
-  std::string tmp = "--benchmark_out=";
-  tmp += tmp_file_name;
-  new_argv.emplace_back(const_cast<char*>(tmp.c_str()));
-
-  argc = int(new_argv.size());
-
-  benchmark::Initialize(&argc, new_argv.data());
-  benchmark::RunSpecifiedBenchmarks();
-
-  // Read the output back from the file, and delete the file.
-  std::ifstream tmp_stream(tmp_file_name);
-  std::string output = std::string((std::istreambuf_iterator<char>(tmp_stream)),
-                                   std::istreambuf_iterator<char>());
-  std::remove(tmp_file_name.c_str());
-
-  return output;
-}
diff --git a/3rdparty/benchmark/test/perf_counters_gtest.cc b/3rdparty/benchmark/test/perf_counters_gtest.cc
deleted file mode 100644
index 3eac6246..00000000
--- a/3rdparty/benchmark/test/perf_counters_gtest.cc
+++ /dev/null
@@ -1,145 +0,0 @@
-#include <thread>
-
-#include "../src/perf_counters.h"
-#include "gtest/gtest.h"
-
-#ifndef GTEST_SKIP
-struct MsgHandler {
-  void operator=(std::ostream&) {}
-};
-#define GTEST_SKIP() return MsgHandler() = std::cout
-#endif
-
-using benchmark::internal::PerfCounters;
-using benchmark::internal::PerfCounterValues;
-
-namespace {
-const char kGenericPerfEvent1[] = "CYCLES";
-const char kGenericPerfEvent2[] = "BRANCHES";
-const char kGenericPerfEvent3[] = "INSTRUCTIONS";
-
-TEST(PerfCountersTest, Init) {
-  EXPECT_EQ(PerfCounters::Initialize(), PerfCounters::kSupported);
-}
-
-TEST(PerfCountersTest, OneCounter) {
-  if (!PerfCounters::kSupported) {
-    GTEST_SKIP() << "Performance counters not supported.\n";
-  }
-  EXPECT_TRUE(PerfCounters::Initialize());
-  EXPECT_TRUE(PerfCounters::Create({kGenericPerfEvent1}).IsValid());
-}
-
-TEST(PerfCountersTest, NegativeTest) {
-  if (!PerfCounters::kSupported) {
-    EXPECT_FALSE(PerfCounters::Initialize());
-    return;
-  }
-  EXPECT_TRUE(PerfCounters::Initialize());
-  EXPECT_FALSE(PerfCounters::Create({}).IsValid());
-  EXPECT_FALSE(PerfCounters::Create({""}).IsValid());
-  EXPECT_FALSE(PerfCounters::Create({"not a counter name"}).IsValid());
-  {
-    EXPECT_TRUE(PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent2,
-                                      kGenericPerfEvent3})
-                    .IsValid());
-  }
-  EXPECT_FALSE(
-      PerfCounters::Create({kGenericPerfEvent2, "", kGenericPerfEvent1})
-          .IsValid());
-  EXPECT_FALSE(PerfCounters::Create({kGenericPerfEvent3, "not a counter name",
-                                     kGenericPerfEvent1})
-                   .IsValid());
-  {
-    EXPECT_TRUE(PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent2,
-                                      kGenericPerfEvent3})
-                    .IsValid());
-  }
-  EXPECT_FALSE(
-      PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent2,
-                            kGenericPerfEvent3, "MISPREDICTED_BRANCH_RETIRED"})
-          .IsValid());
-}
-
-TEST(PerfCountersTest, Read1Counter) {
-  if (!PerfCounters::kSupported) {
-    GTEST_SKIP() << "Test skipped because libpfm is not supported.\n";
-  }
-  EXPECT_TRUE(PerfCounters::Initialize());
-  auto counters = PerfCounters::Create({kGenericPerfEvent1});
-  EXPECT_TRUE(counters.IsValid());
-  PerfCounterValues values1(1);
-  EXPECT_TRUE(counters.Snapshot(&values1));
-  EXPECT_GT(values1[0], 0);
-  PerfCounterValues values2(1);
-  EXPECT_TRUE(counters.Snapshot(&values2));
-  EXPECT_GT(values2[0], 0);
-  EXPECT_GT(values2[0], values1[0]);
-}
-
-TEST(PerfCountersTest, Read2Counters) {
-  if (!PerfCounters::kSupported) {
-    GTEST_SKIP() << "Test skipped because libpfm is not supported.\n";
-  }
-  EXPECT_TRUE(PerfCounters::Initialize());
-  auto counters =
-      PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent2});
-  EXPECT_TRUE(counters.IsValid());
-  PerfCounterValues values1(2);
-  EXPECT_TRUE(counters.Snapshot(&values1));
-  EXPECT_GT(values1[0], 0);
-  EXPECT_GT(values1[1], 0);
-  PerfCounterValues values2(2);
-  EXPECT_TRUE(counters.Snapshot(&values2));
-  EXPECT_GT(values2[0], 0);
-  EXPECT_GT(values2[1], 0);
-}
-
-size_t do_work() {
-  size_t res = 0;
-  for (size_t i = 0; i < 100000000; ++i) res += i * i;
-  return res;
-}
-
-void measure(size_t threadcount, PerfCounterValues* values1,
-             PerfCounterValues* values2) {
-  BM_CHECK_NE(values1, nullptr);
-  BM_CHECK_NE(values2, nullptr);
-  std::vector<std::thread> threads(threadcount);
-  auto work = [&]() { BM_CHECK(do_work() > 1000); };
-
-  // We need to first set up the counters, then start the threads, so the
-  // threads would inherit the counters. But later, we need to first destroy the
-  // thread pool (so all the work finishes), then measure the counters. So the
-  // scopes overlap, and we need to explicitly control the scope of the
-  // threadpool.
-  auto counters =
-      PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent3});
-  for (auto& t : threads) t = std::thread(work);
-  counters.Snapshot(values1);
-  for (auto& t : threads) t.join();
-  counters.Snapshot(values2);
-}
-
-TEST(PerfCountersTest, MultiThreaded) {
-  if (!PerfCounters::kSupported) {
-    GTEST_SKIP() << "Test skipped because libpfm is not supported.";
-  }
-  EXPECT_TRUE(PerfCounters::Initialize());
-  PerfCounterValues values1(2);
-  PerfCounterValues values2(2);
-
-  measure(2, &values1, &values2);
-  std::vector<double> D1{static_cast<double>(values2[0] - values1[0]),
-                         static_cast<double>(values2[1] - values1[1])};
-
-  measure(4, &values1, &values2);
-  std::vector<double> D2{static_cast<double>(values2[0] - values1[0]),
-                         static_cast<double>(values2[1] - values1[1])};
-
-  // Some extra work will happen on the main thread - like joining the threads
-  // - so the ratio won't be quite 2.0, but very close.
-  EXPECT_GE(D2[0], 1.9 * D1[0]);
-  EXPECT_GE(D2[1], 1.9 * D1[1]);
-}
-}  // namespace
diff --git a/3rdparty/benchmark/test/perf_counters_test.cc b/3rdparty/benchmark/test/perf_counters_test.cc
deleted file mode 100644
index 3017a452..00000000
--- a/3rdparty/benchmark/test/perf_counters_test.cc
+++ /dev/null
@@ -1,27 +0,0 @@
-#undef NDEBUG
-
-#include "../src/perf_counters.h"
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-static void BM_Simple(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-}
-BENCHMARK(BM_Simple);
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Simple\",$"}});
-
-static void CheckSimple(Results const& e) {
-  CHECK_COUNTER_VALUE(e, double, "CYCLES", GT, 0);
-  CHECK_COUNTER_VALUE(e, double, "BRANCHES", GT, 0.0);
-}
-CHECK_BENCHMARK_RESULTS("BM_Simple", &CheckSimple);
-
-int main(int argc, char* argv[]) {
-  if (!benchmark::internal::PerfCounters::kSupported) {
-    return 0;
-  }
-  RunOutputTests(argc, argv);
-}
diff --git a/3rdparty/benchmark/test/register_benchmark_test.cc b/3rdparty/benchmark/test/register_benchmark_test.cc
deleted file mode 100644
index 602405b6..00000000
--- a/3rdparty/benchmark/test/register_benchmark_test.cc
+++ /dev/null
@@ -1,184 +0,0 @@
-
-#undef NDEBUG
-#include <cassert>
-#include <vector>
-
-#include "../src/check.h"  // NOTE: check.h is for internal use only!
-#include "benchmark/benchmark.h"
-
-namespace {
-
-class TestReporter : public benchmark::ConsoleReporter {
- public:
-  virtual void ReportRuns(const std::vector<Run>& report) BENCHMARK_OVERRIDE {
-    all_runs_.insert(all_runs_.end(), begin(report), end(report));
-    ConsoleReporter::ReportRuns(report);
-  }
-
-  std::vector<Run> all_runs_;
-};
-
-struct TestCase {
-  std::string name;
-  const char* label;
-  // Note: not explicit as we rely on it being converted through ADD_CASES.
-  TestCase(const char* xname) : TestCase(xname, nullptr) {}
-  TestCase(const char* xname, const char* xlabel)
-      : name(xname), label(xlabel) {}
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-
-  void CheckRun(Run const& run) const {
-    // clang-format off
-    BM_CHECK(name == run.benchmark_name()) << "expected " << name << " got "
-                                      << run.benchmark_name();
-    if (label) {
-      BM_CHECK(run.report_label == label) << "expected " << label << " got "
-                                       << run.report_label;
-    } else {
-      BM_CHECK(run.report_label.empty());
-    }
-    // clang-format on
-  }
-};
-
-std::vector<TestCase> ExpectedResults;
-
-int AddCases(std::initializer_list<TestCase> const& v) {
-  for (const auto& N : v) {
-    ExpectedResults.push_back(N);
-  }
-  return 0;
-}
-
-#define CONCAT(x, y) CONCAT2(x, y)
-#define CONCAT2(x, y) x##y
-#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = AddCases({__VA_ARGS__})
-
-}  // end namespace
-
-typedef benchmark::internal::Benchmark* ReturnVal;
-
-//----------------------------------------------------------------------------//
-// Test RegisterBenchmark with no additional arguments
-//----------------------------------------------------------------------------//
-void BM_function(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_function);
-ReturnVal dummy = benchmark::RegisterBenchmark(
-    "BM_function_manual_registration", BM_function);
-ADD_CASES({"BM_function"}, {"BM_function_manual_registration"});
-
-//----------------------------------------------------------------------------//
-// Test RegisterBenchmark with additional arguments
-// Note: GCC <= 4.8 do not support this form of RegisterBenchmark because they
-//       reject the variadic pack expansion of lambda captures.
-//----------------------------------------------------------------------------//
-#ifndef BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
-
-void BM_extra_args(benchmark::State& st, const char* label) {
-  for (auto _ : st) {
-  }
-  st.SetLabel(label);
-}
-int RegisterFromFunction() {
-  std::pair<const char*, const char*> cases[] = {
-      {"test1", "One"}, {"test2", "Two"}, {"test3", "Three"}};
-  for (auto const& c : cases)
-    benchmark::RegisterBenchmark(c.first, &BM_extra_args, c.second);
-  return 0;
-}
-int dummy2 = RegisterFromFunction();
-ADD_CASES({"test1", "One"}, {"test2", "Two"}, {"test3", "Three"});
-
-#endif  // BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
-
-//----------------------------------------------------------------------------//
-// Test RegisterBenchmark with different callable types
-//----------------------------------------------------------------------------//
-
-struct CustomFixture {
-  void operator()(benchmark::State& st) {
-    for (auto _ : st) {
-    }
-  }
-};
-
-void TestRegistrationAtRuntime() {
-#ifdef BENCHMARK_HAS_CXX11
-  {
-    CustomFixture fx;
-    benchmark::RegisterBenchmark("custom_fixture", fx);
-    AddCases({"custom_fixture"});
-  }
-#endif
-#ifndef BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
-  {
-    const char* x = "42";
-    auto capturing_lam = [=](benchmark::State& st) {
-      for (auto _ : st) {
-      }
-      st.SetLabel(x);
-    };
-    benchmark::RegisterBenchmark("lambda_benchmark", capturing_lam);
-    AddCases({{"lambda_benchmark", x}});
-  }
-#endif
-}
-
-// Test that all benchmarks, registered at either during static init or runtime,
-// are run and the results are passed to the reported.
-void RunTestOne() {
-  TestRegistrationAtRuntime();
-
-  TestReporter test_reporter;
-  benchmark::RunSpecifiedBenchmarks(&test_reporter);
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-  auto EB = ExpectedResults.begin();
-
-  for (Run const& run : test_reporter.all_runs_) {
-    assert(EB != ExpectedResults.end());
-    EB->CheckRun(run);
-    ++EB;
-  }
-  assert(EB == ExpectedResults.end());
-}
-
-// Test that ClearRegisteredBenchmarks() clears all previously registered
-// benchmarks.
-// Also test that new benchmarks can be registered and ran afterwards.
-void RunTestTwo() {
-  assert(ExpectedResults.size() != 0 &&
-         "must have at least one registered benchmark");
-  ExpectedResults.clear();
-  benchmark::ClearRegisteredBenchmarks();
-
-  TestReporter test_reporter;
-  size_t num_ran = benchmark::RunSpecifiedBenchmarks(&test_reporter);
-  assert(num_ran == 0);
-  assert(test_reporter.all_runs_.begin() == test_reporter.all_runs_.end());
-
-  TestRegistrationAtRuntime();
-  num_ran = benchmark::RunSpecifiedBenchmarks(&test_reporter);
-  assert(num_ran == ExpectedResults.size());
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-  auto EB = ExpectedResults.begin();
-
-  for (Run const& run : test_reporter.all_runs_) {
-    assert(EB != ExpectedResults.end());
-    EB->CheckRun(run);
-    ++EB;
-  }
-  assert(EB == ExpectedResults.end());
-}
-
-int main(int argc, char* argv[]) {
-  benchmark::Initialize(&argc, argv);
-
-  RunTestOne();
-  RunTestTwo();
-}
diff --git a/3rdparty/benchmark/test/repetitions_test.cc b/3rdparty/benchmark/test/repetitions_test.cc
deleted file mode 100644
index 569777d5..00000000
--- a/3rdparty/benchmark/test/repetitions_test.cc
+++ /dev/null
@@ -1,214 +0,0 @@
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// ========================================================================= //
-// ------------------------ Testing Basic Output --------------------------- //
-// ========================================================================= //
-
-static void BM_ExplicitRepetitions(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_ExplicitRepetitions)->Repetitions(2);
-
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_ExplicitRepetitions/repeats:2 %console_report$"}});
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_ExplicitRepetitions/repeats:2 %console_report$"}});
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_ExplicitRepetitions/repeats:2_mean %console_report$"}});
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_ExplicitRepetitions/repeats:2_median %console_report$"}});
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_ExplicitRepetitions/repeats:2_stddev %console_report$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\"$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"repetition_index\": 1,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\"$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2_mean\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\"$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2_median\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\"$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2_stddev\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\"$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ExplicitRepetitions/repeats:2\",%csv_report$"}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ExplicitRepetitions/repeats:2\",%csv_report$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_ExplicitRepetitions/repeats:2_mean\",%csv_report$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_ExplicitRepetitions/repeats:2_median\",%csv_report$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_ExplicitRepetitions/repeats:2_stddev\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Basic Output --------------------------- //
-// ========================================================================= //
-
-static void BM_ImplicitRepetitions(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_ImplicitRepetitions);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions %console_report$"}});
-ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions %console_report$"}});
-ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions %console_report$"}});
-ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions_mean %console_report$"}});
-ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions_median %console_report$"}});
-ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions_stddev %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions\",$"},
-                       {"\"family_index\": 1,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions\",$"},
-                       {"\"family_index\": 1,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"repetition_index\": 1,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions\",$"},
-                       {"\"family_index\": 1,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"repetition_index\": 2,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions_mean\",$"},
-                       {"\"family_index\": 1,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"mean\",$", MR_Next},
-                       {"\"aggregate_unit\": \"time\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions_median\",$"},
-                       {"\"family_index\": 1,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"median\",$", MR_Next},
-                       {"\"aggregate_unit\": \"time\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions_stddev\",$"},
-                       {"\"family_index\": 1,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
-                       {"\"aggregate_unit\": \"time\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions\",%csv_report$"}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions\",%csv_report$"}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions_mean\",%csv_report$"}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions_median\",%csv_report$"}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions_stddev\",%csv_report$"}});
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/test/report_aggregates_only_test.cc b/3rdparty/benchmark/test/report_aggregates_only_test.cc
deleted file mode 100644
index 47da5035..00000000
--- a/3rdparty/benchmark/test/report_aggregates_only_test.cc
+++ /dev/null
@@ -1,41 +0,0 @@
-
-#undef NDEBUG
-#include <cstdio>
-#include <string>
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// Ok this test is super ugly. We want to check what happens with the file
-// reporter in the presence of ReportAggregatesOnly().
-// We do not care about console output, the normal tests check that already.
-
-void BM_SummaryRepeat(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->ReportAggregatesOnly();
-
-int main(int argc, char* argv[]) {
-  const std::string output = GetFileReporterOutput(argc, argv);
-
-  if (SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3") != 4 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_mean\"") != 1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_median\"") !=
-          1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\"") !=
-          1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_cv\"") != 1) {
-    std::cout << "Precondition mismatch. Expected to only find four "
-                 "occurrences of \"BM_SummaryRepeat/repeats:3\" substring:\n"
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_mean\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_median\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_cv\"\nThe entire "
-                 "output:\n";
-    std::cout << output;
-    return 1;
-  }
-
-  return 0;
-}
diff --git a/3rdparty/benchmark/test/reporter_output_test.cc b/3rdparty/benchmark/test/reporter_output_test.cc
deleted file mode 100644
index 2b6e6543..00000000
--- a/3rdparty/benchmark/test/reporter_output_test.cc
+++ /dev/null
@@ -1,1127 +0,0 @@
-
-#undef NDEBUG
-#include <numeric>
-#include <utility>
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// ========================================================================= //
-// ---------------------- Testing Prologue Output -------------------------- //
-// ========================================================================= //
-
-ADD_CASES(TC_ConsoleOut, {{"^[-]+$", MR_Next},
-                          {"^Benchmark %s Time %s CPU %s Iterations$", MR_Next},
-                          {"^[-]+$", MR_Next}});
-static int AddContextCases() {
-  AddCases(TC_ConsoleErr,
-           {
-               {"^%int-%int-%intT%int:%int:%int[-+]%int:%int$", MR_Default},
-               {"Running .*/reporter_output_test(\\.exe)?$", MR_Next},
-               {"Run on \\(%int X %float MHz CPU s?\\)", MR_Next},
-           });
-  AddCases(TC_JSONOut,
-           {{"^\\{", MR_Default},
-            {"\"context\":", MR_Next},
-            {"\"date\": \"", MR_Next},
-            {"\"host_name\":", MR_Next},
-            {"\"executable\": \".*(/|\\\\)reporter_output_test(\\.exe)?\",",
-             MR_Next},
-            {"\"num_cpus\": %int,$", MR_Next},
-            {"\"mhz_per_cpu\": %float,$", MR_Next},
-            {"\"caches\": \\[$", MR_Default}});
-  auto const& Info = benchmark::CPUInfo::Get();
-  auto const& Caches = Info.caches;
-  if (!Caches.empty()) {
-    AddCases(TC_ConsoleErr, {{"CPU Caches:$", MR_Next}});
-  }
-  for (size_t I = 0; I < Caches.size(); ++I) {
-    std::string num_caches_str =
-        Caches[I].num_sharing != 0 ? " \\(x%int\\)$" : "$";
-    AddCases(TC_ConsoleErr,
-             {{"L%int (Data|Instruction|Unified) %int KiB" + num_caches_str,
-               MR_Next}});
-    AddCases(TC_JSONOut, {{"\\{$", MR_Next},
-                          {"\"type\": \"", MR_Next},
-                          {"\"level\": %int,$", MR_Next},
-                          {"\"size\": %int,$", MR_Next},
-                          {"\"num_sharing\": %int$", MR_Next},
-                          {"}[,]{0,1}$", MR_Next}});
-  }
-  AddCases(TC_JSONOut, {{"],$"}});
-  auto const& LoadAvg = Info.load_avg;
-  if (!LoadAvg.empty()) {
-    AddCases(TC_ConsoleErr,
-             {{"Load Average: (%float, ){0,2}%float$", MR_Next}});
-  }
-  AddCases(TC_JSONOut, {{"\"load_avg\": \\[(%float,?){0,3}],$", MR_Next}});
-  return 0;
-}
-int dummy_register = AddContextCases();
-ADD_CASES(TC_CSVOut, {{"%csv_header"}});
-
-// ========================================================================= //
-// ------------------------ Testing Basic Output --------------------------- //
-// ========================================================================= //
-
-void BM_basic(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_basic);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_basic %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_basic\",$"},
-                       {"\"family_index\": 0,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_basic\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_basic\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Bytes per Second Output ---------------- //
-// ========================================================================= //
-
-void BM_bytes_per_second(benchmark::State& state) {
-  for (auto _ : state) {
-    // This test requires a non-zero CPU time to avoid divide-by-zero
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  state.SetBytesProcessed(1);
-}
-BENCHMARK(BM_bytes_per_second);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_bytes_per_second %console_report "
-                           "bytes_per_second=%float[kM]{0,1}/s$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_bytes_per_second\",$"},
-                       {"\"family_index\": 1,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_bytes_per_second\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"bytes_per_second\": %float$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_bytes_per_second\",%csv_bytes_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Items per Second Output ---------------- //
-// ========================================================================= //
-
-void BM_items_per_second(benchmark::State& state) {
-  for (auto _ : state) {
-    // This test requires a non-zero CPU time to avoid divide-by-zero
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  state.SetItemsProcessed(1);
-}
-BENCHMARK(BM_items_per_second);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_items_per_second %console_report "
-                           "items_per_second=%float[kM]{0,1}/s$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_items_per_second\",$"},
-                       {"\"family_index\": 2,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_items_per_second\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"items_per_second\": %float$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_items_per_second\",%csv_items_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Label Output --------------------------- //
-// ========================================================================= //
-
-void BM_label(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.SetLabel("some label");
-}
-BENCHMARK(BM_label);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_label %console_report some label$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_label\",$"},
-                       {"\"family_index\": 3,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_label\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"label\": \"some label\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_label\",%csv_label_report_begin\"some "
-                       "label\"%csv_label_report_end$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Time Label Output ---------------------- //
-// ========================================================================= //
-
-void BM_time_label_nanosecond(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_time_label_nanosecond)->Unit(benchmark::kNanosecond);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_time_label_nanosecond %console_report$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_time_label_nanosecond\",$"},
-           {"\"family_index\": 4,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_time_label_nanosecond\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\"$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_time_label_nanosecond\",%csv_report$"}});
-
-void BM_time_label_microsecond(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_time_label_microsecond)->Unit(benchmark::kMicrosecond);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_time_label_microsecond %console_us_report$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_time_label_microsecond\",$"},
-           {"\"family_index\": 5,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_time_label_microsecond\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"us\"$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_time_label_microsecond\",%csv_us_report$"}});
-
-void BM_time_label_millisecond(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_time_label_millisecond)->Unit(benchmark::kMillisecond);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_time_label_millisecond %console_ms_report$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_time_label_millisecond\",$"},
-           {"\"family_index\": 6,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_time_label_millisecond\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ms\"$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_time_label_millisecond\",%csv_ms_report$"}});
-
-void BM_time_label_second(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_time_label_second)->Unit(benchmark::kSecond);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_time_label_second %console_s_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_time_label_second\",$"},
-                       {"\"family_index\": 7,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_time_label_second\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"s\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_time_label_second\",%csv_s_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Error Output --------------------------- //
-// ========================================================================= //
-
-void BM_error(benchmark::State& state) {
-  state.SkipWithError("message");
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_error);
-ADD_CASES(TC_ConsoleOut, {{"^BM_error[ ]+ERROR OCCURRED: 'message'$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_error\",$"},
-                       {"\"family_index\": 8,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_error\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"error_occurred\": true,$", MR_Next},
-                       {"\"error_message\": \"message\",$", MR_Next}});
-
-ADD_CASES(TC_CSVOut, {{"^\"BM_error\",,,,,,,,true,\"message\"$"}});
-
-// ========================================================================= //
-// ------------------------ Testing No Arg Name Output -----------------------
-// //
-// ========================================================================= //
-
-void BM_no_arg_name(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_no_arg_name)->Arg(3);
-ADD_CASES(TC_ConsoleOut, {{"^BM_no_arg_name/3 %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_no_arg_name/3\",$"},
-                       {"\"family_index\": 9,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_no_arg_name/3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_no_arg_name/3\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Arg Name Output ----------------------- //
-// ========================================================================= //
-
-void BM_arg_name(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_arg_name)->ArgName("first")->Arg(3);
-ADD_CASES(TC_ConsoleOut, {{"^BM_arg_name/first:3 %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_arg_name/first:3\",$"},
-                       {"\"family_index\": 10,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_arg_name/first:3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_arg_name/first:3\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Arg Names Output ----------------------- //
-// ========================================================================= //
-
-void BM_arg_names(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_arg_names)->Args({2, 5, 4})->ArgNames({"first", "", "third"});
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_arg_names/first:2/5/third:4 %console_report$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_arg_names/first:2/5/third:4\",$"},
-           {"\"family_index\": 11,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_arg_names/first:2/5/third:4\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_arg_names/first:2/5/third:4\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Name Output ---------------------------- //
-// ========================================================================= //
-
-void BM_name(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_name)->Name("BM_custom_name");
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_custom_name %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_custom_name\",$"},
-                       {"\"family_index\": 12,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_custom_name\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_custom_name\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Big Args Output ------------------------ //
-// ========================================================================= //
-
-void BM_BigArgs(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_BigArgs)->RangeMultiplier(2)->Range(1U << 30U, 1U << 31U);
-ADD_CASES(TC_ConsoleOut, {{"^BM_BigArgs/1073741824 %console_report$"},
-                          {"^BM_BigArgs/2147483648 %console_report$"}});
-
-// ========================================================================= //
-// ----------------------- Testing Complexity Output ----------------------- //
-// ========================================================================= //
-
-void BM_Complexity_O1(benchmark::State& state) {
-  for (auto _ : state) {
-    // This test requires a non-zero CPU time to avoid divide-by-zero
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  state.SetComplexityN(state.range(0));
-}
-BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity(benchmark::o1);
-SET_SUBSTITUTIONS({{"%bigOStr", "[ ]* %float \\([0-9]+\\)"},
-                   {"%RMS", "[ ]*[0-9]+ %"}});
-ADD_CASES(TC_ConsoleOut, {{"^BM_Complexity_O1_BigO %bigOStr %bigOStr[ ]*$"},
-                          {"^BM_Complexity_O1_RMS %RMS %RMS[ ]*$"}});
-
-// ========================================================================= //
-// ----------------------- Testing Aggregate Output ------------------------ //
-// ========================================================================= //
-
-// Test that non-aggregate data is printed by default
-void BM_Repeat(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-// need two repetitions min to be able to output any aggregate output
-BENCHMARK(BM_Repeat)->Repetitions(2);
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_Repeat/repeats:2 %console_report$"},
-           {"^BM_Repeat/repeats:2 %console_report$"},
-           {"^BM_Repeat/repeats:2_mean %console_time_only_report [ ]*2$"},
-           {"^BM_Repeat/repeats:2_median %console_time_only_report [ ]*2$"},
-           {"^BM_Repeat/repeats:2_stddev %console_time_only_report [ ]*2$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:2\",$"},
-                       {"\"family_index\": 15,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\"", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 2,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:2\",$"},
-                       {"\"family_index\": 15,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 2,$", MR_Next},
-                       {"\"repetition_index\": 1,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:2_mean\",$"},
-                       {"\"family_index\": 15,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 2,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"mean\",$", MR_Next},
-                       {"\"aggregate_unit\": \"time\",$", MR_Next},
-                       {"\"iterations\": 2,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:2_median\",$"},
-                       {"\"family_index\": 15,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 2,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"median\",$", MR_Next},
-                       {"\"aggregate_unit\": \"time\",$", MR_Next},
-                       {"\"iterations\": 2,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:2_stddev\",$"},
-                       {"\"family_index\": 15,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 2,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
-                       {"\"aggregate_unit\": \"time\",$", MR_Next},
-                       {"\"iterations\": 2,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:2\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:2\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:2_mean\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:2_median\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:2_stddev\",%csv_report$"}});
-// but for two repetitions, mean and median is the same, so let's repeat..
-BENCHMARK(BM_Repeat)->Repetitions(3);
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_Repeat/repeats:3 %console_report$"},
-           {"^BM_Repeat/repeats:3 %console_report$"},
-           {"^BM_Repeat/repeats:3 %console_report$"},
-           {"^BM_Repeat/repeats:3_mean %console_time_only_report [ ]*3$"},
-           {"^BM_Repeat/repeats:3_median %console_time_only_report [ ]*3$"},
-           {"^BM_Repeat/repeats:3_stddev %console_time_only_report [ ]*3$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:3\",$"},
-                       {"\"family_index\": 16,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3\",$"},
-                       {"\"family_index\": 16,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"repetition_index\": 1,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3\",$"},
-                       {"\"family_index\": 16,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"repetition_index\": 2,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3_mean\",$"},
-                       {"\"family_index\": 16,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"mean\",$", MR_Next},
-                       {"\"aggregate_unit\": \"time\",$", MR_Next},
-                       {"\"iterations\": 3,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3_median\",$"},
-                       {"\"family_index\": 16,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"median\",$", MR_Next},
-                       {"\"aggregate_unit\": \"time\",$", MR_Next},
-                       {"\"iterations\": 3,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3_stddev\",$"},
-                       {"\"family_index\": 16,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
-                       {"\"aggregate_unit\": \"time\",$", MR_Next},
-                       {"\"iterations\": 3,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:3\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3_mean\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3_median\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3_stddev\",%csv_report$"}});
-// median differs between even/odd number of repetitions, so just to be sure
-BENCHMARK(BM_Repeat)->Repetitions(4);
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_Repeat/repeats:4 %console_report$"},
-           {"^BM_Repeat/repeats:4 %console_report$"},
-           {"^BM_Repeat/repeats:4 %console_report$"},
-           {"^BM_Repeat/repeats:4 %console_report$"},
-           {"^BM_Repeat/repeats:4_mean %console_time_only_report [ ]*4$"},
-           {"^BM_Repeat/repeats:4_median %console_time_only_report [ ]*4$"},
-           {"^BM_Repeat/repeats:4_stddev %console_time_only_report [ ]*4$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:4\",$"},
-                       {"\"family_index\": 17,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 4,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
-                       {"\"family_index\": 17,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 4,$", MR_Next},
-                       {"\"repetition_index\": 1,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
-                       {"\"family_index\": 17,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 4,$", MR_Next},
-                       {"\"repetition_index\": 2,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
-                       {"\"family_index\": 17,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 4,$", MR_Next},
-                       {"\"repetition_index\": 3,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4_mean\",$"},
-                       {"\"family_index\": 17,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 4,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"mean\",$", MR_Next},
-                       {"\"aggregate_unit\": \"time\",$", MR_Next},
-                       {"\"iterations\": 4,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4_median\",$"},
-                       {"\"family_index\": 17,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 4,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"median\",$", MR_Next},
-                       {"\"aggregate_unit\": \"time\",$", MR_Next},
-                       {"\"iterations\": 4,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4_stddev\",$"},
-                       {"\"family_index\": 17,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 4,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
-                       {"\"aggregate_unit\": \"time\",$", MR_Next},
-                       {"\"iterations\": 4,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:4\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4_mean\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4_median\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4_stddev\",%csv_report$"}});
-
-// Test that a non-repeated test still prints non-aggregate results even when
-// only-aggregate reports have been requested
-void BM_RepeatOnce(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_RepeatOnce)->Repetitions(1)->ReportAggregatesOnly();
-ADD_CASES(TC_ConsoleOut, {{"^BM_RepeatOnce/repeats:1 %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_RepeatOnce/repeats:1\",$"},
-                       {"\"family_index\": 18,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_RepeatOnce/repeats:1\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_RepeatOnce/repeats:1\",%csv_report$"}});
-
-// Test that non-aggregate data is not reported
-void BM_SummaryRepeat(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->ReportAggregatesOnly();
-ADD_CASES(
-    TC_ConsoleOut,
-    {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
-     {"^BM_SummaryRepeat/repeats:3_mean %console_time_only_report [ ]*3$"},
-     {"^BM_SummaryRepeat/repeats:3_median %console_time_only_report [ ]*3$"},
-     {"^BM_SummaryRepeat/repeats:3_stddev %console_time_only_report [ ]*3$"}});
-ADD_CASES(TC_JSONOut,
-          {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
-           {"\"name\": \"BM_SummaryRepeat/repeats:3_mean\",$"},
-           {"\"family_index\": 19,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 3,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"name\": \"BM_SummaryRepeat/repeats:3_median\",$"},
-           {"\"family_index\": 19,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 3,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"name\": \"BM_SummaryRepeat/repeats:3_stddev\",$"},
-           {"\"family_index\": 19,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 3,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
-                      {"^\"BM_SummaryRepeat/repeats:3_mean\",%csv_report$"},
-                      {"^\"BM_SummaryRepeat/repeats:3_median\",%csv_report$"},
-                      {"^\"BM_SummaryRepeat/repeats:3_stddev\",%csv_report$"}});
-
-// Test that non-aggregate data is not displayed.
-// NOTE: this test is kinda bad. we are only testing the display output.
-//       But we don't check that the file output still contains everything...
-void BM_SummaryDisplay(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_SummaryDisplay)->Repetitions(2)->DisplayAggregatesOnly();
-ADD_CASES(
-    TC_ConsoleOut,
-    {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
-     {"^BM_SummaryDisplay/repeats:2_mean %console_time_only_report [ ]*2$"},
-     {"^BM_SummaryDisplay/repeats:2_median %console_time_only_report [ ]*2$"},
-     {"^BM_SummaryDisplay/repeats:2_stddev %console_time_only_report [ ]*2$"}});
-ADD_CASES(TC_JSONOut,
-          {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
-           {"\"name\": \"BM_SummaryDisplay/repeats:2_mean\",$"},
-           {"\"family_index\": 20,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"name\": \"BM_SummaryDisplay/repeats:2_median\",$"},
-           {"\"family_index\": 20,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"name\": \"BM_SummaryDisplay/repeats:2_stddev\",$"},
-           {"\"family_index\": 20,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next}});
-ADD_CASES(TC_CSVOut,
-          {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
-           {"^\"BM_SummaryDisplay/repeats:2_mean\",%csv_report$"},
-           {"^\"BM_SummaryDisplay/repeats:2_median\",%csv_report$"},
-           {"^\"BM_SummaryDisplay/repeats:2_stddev\",%csv_report$"}});
-
-// Test repeats with custom time unit.
-void BM_RepeatTimeUnit(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_RepeatTimeUnit)
-    ->Repetitions(3)
-    ->ReportAggregatesOnly()
-    ->Unit(benchmark::kMicrosecond);
-ADD_CASES(
-    TC_ConsoleOut,
-    {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
-     {"^BM_RepeatTimeUnit/repeats:3_mean %console_us_time_only_report [ ]*3$"},
-     {"^BM_RepeatTimeUnit/repeats:3_median %console_us_time_only_report [ "
-      "]*3$"},
-     {"^BM_RepeatTimeUnit/repeats:3_stddev %console_us_time_only_report [ "
-      "]*3$"}});
-ADD_CASES(TC_JSONOut,
-          {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
-           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_mean\",$"},
-           {"\"family_index\": 21,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 3,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"time_unit\": \"us\",?$"},
-           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_median\",$"},
-           {"\"family_index\": 21,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 3,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"time_unit\": \"us\",?$"},
-           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_stddev\",$"},
-           {"\"family_index\": 21,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 3,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"time_unit\": \"us\",?$"}});
-ADD_CASES(TC_CSVOut,
-          {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
-           {"^\"BM_RepeatTimeUnit/repeats:3_mean\",%csv_us_report$"},
-           {"^\"BM_RepeatTimeUnit/repeats:3_median\",%csv_us_report$"},
-           {"^\"BM_RepeatTimeUnit/repeats:3_stddev\",%csv_us_report$"}});
-
-// ========================================================================= //
-// -------------------- Testing user-provided statistics ------------------- //
-// ========================================================================= //
-
-const auto UserStatistics = [](const std::vector<double>& v) {
-  return v.back();
-};
-void BM_UserStats(benchmark::State& state) {
-  for (auto _ : state) {
-    state.SetIterationTime(150 / 10e8);
-  }
-}
-// clang-format off
-BENCHMARK(BM_UserStats)
-  ->Repetitions(3)
-  ->Iterations(5)
-  ->UseManualTime()
-  ->ComputeStatistics("", UserStatistics);
-// clang-format on
-
-// check that user-provided stats is calculated, and is after the default-ones
-// empty string as name is intentional, it would sort before anything else
-ADD_CASES(TC_ConsoleOut, {{"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
-                           "]* 150 ns %time [ ]*5$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
-                           "]* 150 ns %time [ ]*5$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
-                           "]* 150 ns %time [ ]*5$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/"
-                           "manual_time_mean [ ]* 150 ns %time [ ]*3$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/"
-                           "manual_time_median [ ]* 150 ns %time [ ]*3$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/"
-                           "manual_time_stddev [ ]* 0.000 ns %time [ ]*3$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/manual_time_ "
-                           "[ ]* 150 ns %time [ ]*3$"}});
-ADD_CASES(
-    TC_JSONOut,
-    {{"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
-     {"\"family_index\": 22,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"iteration\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"repetition_index\": 0,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"iterations\": 5,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
-     {"\"family_index\": 22,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"iteration\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"repetition_index\": 1,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"iterations\": 5,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
-     {"\"family_index\": 22,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"iteration\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"repetition_index\": 2,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"iterations\": 5,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_mean\",$"},
-     {"\"family_index\": 22,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"aggregate_name\": \"mean\",$", MR_Next},
-     {"\"aggregate_unit\": \"time\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_median\",$"},
-     {"\"family_index\": 22,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"aggregate_name\": \"median\",$", MR_Next},
-     {"\"aggregate_unit\": \"time\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_stddev\",$"},
-     {"\"family_index\": 22,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"aggregate_name\": \"stddev\",$", MR_Next},
-     {"\"aggregate_unit\": \"time\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": %float,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_\",$"},
-     {"\"family_index\": 22,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"aggregate_name\": \"\",$", MR_Next},
-     {"\"aggregate_unit\": \"time\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next}});
-ADD_CASES(
-    TC_CSVOut,
-    {{"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time_mean\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/"
-      "manual_time_median\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/"
-      "manual_time_stddev\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time_\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------- Testing relative standard deviation statistics ------------ //
-// ========================================================================= //
-
-const auto UserPercentStatistics = [](const std::vector<double>&) {
-  return 1. / 100.;
-};
-void BM_UserPercentStats(benchmark::State& state) {
-  for (auto _ : state) {
-    state.SetIterationTime(150 / 10e8);
-  }
-}
-// clang-format off
-BENCHMARK(BM_UserPercentStats)
-  ->Repetitions(3)
-  ->Iterations(5)
-  ->UseManualTime()
-  ->Unit(benchmark::TimeUnit::kNanosecond)
-  ->ComputeStatistics("", UserPercentStatistics, benchmark::StatisticUnit::kPercentage);
-// clang-format on
-
-// check that UserPercent-provided stats is calculated, and is after the
-// default-ones empty string as name is intentional, it would sort before
-// anything else
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_UserPercentStats/iterations:5/repeats:3/manual_time [ "
-            "]* 150 ns %time [ ]*5$"},
-           {"^BM_UserPercentStats/iterations:5/repeats:3/manual_time [ "
-            "]* 150 ns %time [ ]*5$"},
-           {"^BM_UserPercentStats/iterations:5/repeats:3/manual_time [ "
-            "]* 150 ns %time [ ]*5$"},
-           {"^BM_UserPercentStats/iterations:5/repeats:3/"
-            "manual_time_mean [ ]* 150 ns %time [ ]*3$"},
-           {"^BM_UserPercentStats/iterations:5/repeats:3/"
-            "manual_time_median [ ]* 150 ns %time [ ]*3$"},
-           {"^BM_UserPercentStats/iterations:5/repeats:3/"
-            "manual_time_stddev [ ]* 0.000 ns %time [ ]*3$"},
-           {"^BM_UserPercentStats/iterations:5/repeats:3/manual_time_ "
-            "[ ]* 1.00 % [ ]* 1.00 %[ ]*3$"}});
-ADD_CASES(
-    TC_JSONOut,
-    {{"\"name\": \"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$"},
-     {"\"family_index\": 23,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": "
-      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"iteration\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"repetition_index\": 0,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"iterations\": 5,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$"},
-     {"\"family_index\": 23,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": "
-      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"iteration\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"repetition_index\": 1,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"iterations\": 5,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$"},
-     {"\"family_index\": 23,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": "
-      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"iteration\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"repetition_index\": 2,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"iterations\": 5,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": "
-      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time_mean\",$"},
-     {"\"family_index\": 23,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": "
-      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"aggregate_name\": \"mean\",$", MR_Next},
-     {"\"aggregate_unit\": \"time\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": "
-      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time_median\",$"},
-     {"\"family_index\": 23,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": "
-      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"aggregate_name\": \"median\",$", MR_Next},
-     {"\"aggregate_unit\": \"time\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": "
-      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time_stddev\",$"},
-     {"\"family_index\": 23,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": "
-      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"aggregate_name\": \"stddev\",$", MR_Next},
-     {"\"aggregate_unit\": \"time\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": %float,$", MR_Next},
-     {"\"name\": "
-      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time_\",$"},
-     {"\"family_index\": 23,$", MR_Next},
-     {"\"per_family_instance_index\": 0,$", MR_Next},
-     {"\"run_name\": "
-      "\"BM_UserPercentStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"repetitions\": 3,$", MR_Next},
-     {"\"threads\": 1,$", MR_Next},
-     {"\"aggregate_name\": \"\",$", MR_Next},
-     {"\"aggregate_unit\": \"percentage\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": 1\\.(0)*e-(0)*2,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_UserPercentStats/iterations:5/repeats:3/"
-                       "manual_time\",%csv_report$"},
-                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
-                       "manual_time\",%csv_report$"},
-                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
-                       "manual_time\",%csv_report$"},
-                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
-                       "manual_time_mean\",%csv_report$"},
-                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
-                       "manual_time_median\",%csv_report$"},
-                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
-                       "manual_time_stddev\",%csv_report$"},
-                      {"^\"BM_UserPercentStats/iterations:5/repeats:3/"
-                       "manual_time_\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------- Testing StrEscape JSON ------------------------ //
-// ========================================================================= //
-#if 0  // enable when csv testing code correctly handles multi-line fields
-void BM_JSON_Format(benchmark::State& state) {
-  state.SkipWithError("val\b\f\n\r\t\\\"with\"es,capes");
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_JSON_Format);
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_JSON_Format\",$"},
-                                              {"\"family_index\": 23,$", MR_Next},
-{"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_JSON_Format\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"error_occurred\": true,$", MR_Next},
-                       {R"("error_message": "val\\b\\f\\n\\r\\t\\\\\\"with\\"es,capes",$)", MR_Next}});
-#endif
-// ========================================================================= //
-// -------------------------- Testing CsvEscape ---------------------------- //
-// ========================================================================= //
-
-void BM_CSV_Format(benchmark::State& state) {
-  state.SkipWithError("\"freedom\"");
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_CSV_Format);
-ADD_CASES(TC_CSVOut, {{"^\"BM_CSV_Format\",,,,,,,,true,\"\"\"freedom\"\"\"$"}});
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/test/skip_with_error_test.cc b/3rdparty/benchmark/test/skip_with_error_test.cc
deleted file mode 100644
index 026d4791..00000000
--- a/3rdparty/benchmark/test/skip_with_error_test.cc
+++ /dev/null
@@ -1,196 +0,0 @@
-
-#undef NDEBUG
-#include <cassert>
-#include <vector>
-
-#include "../src/check.h"  // NOTE: check.h is for internal use only!
-#include "benchmark/benchmark.h"
-
-namespace {
-
-class TestReporter : public benchmark::ConsoleReporter {
- public:
-  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE {
-    return ConsoleReporter::ReportContext(context);
-  };
-
-  virtual void ReportRuns(const std::vector<Run>& report) BENCHMARK_OVERRIDE {
-    all_runs_.insert(all_runs_.end(), begin(report), end(report));
-    ConsoleReporter::ReportRuns(report);
-  }
-
-  TestReporter() {}
-  virtual ~TestReporter() {}
-
-  mutable std::vector<Run> all_runs_;
-};
-
-struct TestCase {
-  std::string name;
-  bool error_occurred;
-  std::string error_message;
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-
-  void CheckRun(Run const& run) const {
-    BM_CHECK(name == run.benchmark_name())
-        << "expected " << name << " got " << run.benchmark_name();
-    BM_CHECK(error_occurred == run.error_occurred);
-    BM_CHECK(error_message == run.error_message);
-    if (error_occurred) {
-      // BM_CHECK(run.iterations == 0);
-    } else {
-      BM_CHECK(run.iterations != 0);
-    }
-  }
-};
-
-std::vector<TestCase> ExpectedResults;
-
-int AddCases(const char* base_name, std::initializer_list<TestCase> const& v) {
-  for (auto TC : v) {
-    TC.name = base_name + TC.name;
-    ExpectedResults.push_back(std::move(TC));
-  }
-  return 0;
-}
-
-#define CONCAT(x, y) CONCAT2(x, y)
-#define CONCAT2(x, y) x##y
-#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = AddCases(__VA_ARGS__)
-
-}  // end namespace
-
-void BM_error_no_running(benchmark::State& state) {
-  state.SkipWithError("error message");
-}
-BENCHMARK(BM_error_no_running);
-ADD_CASES("BM_error_no_running", {{"", true, "error message"}});
-
-void BM_error_before_running(benchmark::State& state) {
-  state.SkipWithError("error message");
-  while (state.KeepRunning()) {
-    assert(false);
-  }
-}
-BENCHMARK(BM_error_before_running);
-ADD_CASES("BM_error_before_running", {{"", true, "error message"}});
-
-void BM_error_before_running_batch(benchmark::State& state) {
-  state.SkipWithError("error message");
-  while (state.KeepRunningBatch(17)) {
-    assert(false);
-  }
-}
-BENCHMARK(BM_error_before_running_batch);
-ADD_CASES("BM_error_before_running_batch", {{"", true, "error message"}});
-
-void BM_error_before_running_range_for(benchmark::State& state) {
-  state.SkipWithError("error message");
-  for (auto _ : state) {
-    assert(false);
-  }
-}
-BENCHMARK(BM_error_before_running_range_for);
-ADD_CASES("BM_error_before_running_range_for", {{"", true, "error message"}});
-
-void BM_error_during_running(benchmark::State& state) {
-  int first_iter = true;
-  while (state.KeepRunning()) {
-    if (state.range(0) == 1 && state.thread_index() <= (state.threads() / 2)) {
-      assert(first_iter);
-      first_iter = false;
-      state.SkipWithError("error message");
-    } else {
-      state.PauseTiming();
-      state.ResumeTiming();
-    }
-  }
-}
-BENCHMARK(BM_error_during_running)->Arg(1)->Arg(2)->ThreadRange(1, 8);
-ADD_CASES("BM_error_during_running", {{"/1/threads:1", true, "error message"},
-                                      {"/1/threads:2", true, "error message"},
-                                      {"/1/threads:4", true, "error message"},
-                                      {"/1/threads:8", true, "error message"},
-                                      {"/2/threads:1", false, ""},
-                                      {"/2/threads:2", false, ""},
-                                      {"/2/threads:4", false, ""},
-                                      {"/2/threads:8", false, ""}});
-
-void BM_error_during_running_ranged_for(benchmark::State& state) {
-  assert(state.max_iterations > 3 && "test requires at least a few iterations");
-  bool first_iter = true;
-  // NOTE: Users should not write the for loop explicitly.
-  for (auto It = state.begin(), End = state.end(); It != End; ++It) {
-    if (state.range(0) == 1) {
-      assert(first_iter);
-      first_iter = false;
-      (void)first_iter;
-      state.SkipWithError("error message");
-      // Test the unfortunate but documented behavior that the ranged-for loop
-      // doesn't automatically terminate when SkipWithError is set.
-      assert(++It != End);
-      break;  // Required behavior
-    }
-  }
-}
-BENCHMARK(BM_error_during_running_ranged_for)->Arg(1)->Arg(2)->Iterations(5);
-ADD_CASES("BM_error_during_running_ranged_for",
-          {{"/1/iterations:5", true, "error message"},
-           {"/2/iterations:5", false, ""}});
-
-void BM_error_after_running(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  if (state.thread_index() <= (state.threads() / 2))
-    state.SkipWithError("error message");
-}
-BENCHMARK(BM_error_after_running)->ThreadRange(1, 8);
-ADD_CASES("BM_error_after_running", {{"/threads:1", true, "error message"},
-                                     {"/threads:2", true, "error message"},
-                                     {"/threads:4", true, "error message"},
-                                     {"/threads:8", true, "error message"}});
-
-void BM_error_while_paused(benchmark::State& state) {
-  bool first_iter = true;
-  while (state.KeepRunning()) {
-    if (state.range(0) == 1 && state.thread_index() <= (state.threads() / 2)) {
-      assert(first_iter);
-      first_iter = false;
-      state.PauseTiming();
-      state.SkipWithError("error message");
-    } else {
-      state.PauseTiming();
-      state.ResumeTiming();
-    }
-  }
-}
-BENCHMARK(BM_error_while_paused)->Arg(1)->Arg(2)->ThreadRange(1, 8);
-ADD_CASES("BM_error_while_paused", {{"/1/threads:1", true, "error message"},
-                                    {"/1/threads:2", true, "error message"},
-                                    {"/1/threads:4", true, "error message"},
-                                    {"/1/threads:8", true, "error message"},
-                                    {"/2/threads:1", false, ""},
-                                    {"/2/threads:2", false, ""},
-                                    {"/2/threads:4", false, ""},
-                                    {"/2/threads:8", false, ""}});
-
-int main(int argc, char* argv[]) {
-  benchmark::Initialize(&argc, argv);
-
-  TestReporter test_reporter;
-  benchmark::RunSpecifiedBenchmarks(&test_reporter);
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-  auto EB = ExpectedResults.begin();
-
-  for (Run const& run : test_reporter.all_runs_) {
-    assert(EB != ExpectedResults.end());
-    EB->CheckRun(run);
-    ++EB;
-  }
-  assert(EB == ExpectedResults.end());
-
-  return 0;
-}
diff --git a/3rdparty/benchmark/test/spec_arg_test.cc b/3rdparty/benchmark/test/spec_arg_test.cc
deleted file mode 100644
index 043db1be..00000000
--- a/3rdparty/benchmark/test/spec_arg_test.cc
+++ /dev/null
@@ -1,95 +0,0 @@
-#include <algorithm>
-#include <cassert>
-#include <cstdint>
-#include <cstdlib>
-#include <cstring>
-#include <iostream>
-#include <limits>
-#include <string>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-
-// Tests that we can override benchmark-spec value from FLAGS_benchmark_filter
-// with argument to RunSpecifiedBenchmarks(...).
-
-namespace {
-
-class TestReporter : public benchmark::ConsoleReporter {
- public:
-  virtual bool ReportContext(const Context& context) BENCHMARK_OVERRIDE {
-    return ConsoleReporter::ReportContext(context);
-  };
-
-  virtual void ReportRuns(const std::vector<Run>& report) BENCHMARK_OVERRIDE {
-    assert(report.size() == 1);
-    matched_functions.push_back(report[0].run_name.function_name);
-    ConsoleReporter::ReportRuns(report);
-  };
-
-  TestReporter() {}
-
-  virtual ~TestReporter() {}
-
-  const std::vector<std::string>& GetMatchedFunctions() const {
-    return matched_functions;
-  }
-
- private:
-  std::vector<std::string> matched_functions;
-};
-
-}  // end namespace
-
-static void BM_NotChosen(benchmark::State& state) {
-  assert(false && "SHOULD NOT BE CALLED");
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_NotChosen);
-
-static void BM_Chosen(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_Chosen);
-
-int main(int argc, char** argv) {
-  const std::string flag = "BM_NotChosen";
-
-  // Verify that argv specify --benchmark_filter=BM_NotChosen.
-  bool found = false;
-  for (int i = 0; i < argc; ++i) {
-    if (strcmp("--benchmark_filter=BM_NotChosen", argv[i]) == 0) {
-      found = true;
-      break;
-    }
-  }
-  assert(found);
-
-  benchmark::Initialize(&argc, argv);
-
-  // Check that the current flag value is reported accurately via the
-  // GetBenchmarkFilter() function.
-  if (flag != benchmark::GetBenchmarkFilter()) {
-    std::cerr
-        << "Seeing different value for flags. GetBenchmarkFilter() returns ["
-        << benchmark::GetBenchmarkFilter() << "] expected flag=[" << flag
-        << "]\n";
-    return 1;
-  }
-  TestReporter test_reporter;
-  const char* const spec = "BM_Chosen";
-  const size_t returned_count =
-      benchmark::RunSpecifiedBenchmarks(&test_reporter, spec);
-  assert(returned_count == 1);
-  const std::vector<std::string> matched_functions =
-      test_reporter.GetMatchedFunctions();
-  assert(matched_functions.size() == 1);
-  if (strcmp(spec, matched_functions.front().c_str()) != 0) {
-    std::cerr << "Expected benchmark [" << spec << "] to run, but got ["
-              << matched_functions.front() << "]\n";
-    return 2;
-  }
-  return 0;
-}
diff --git a/3rdparty/benchmark/test/state_assembly_test.cc b/3rdparty/benchmark/test/state_assembly_test.cc
deleted file mode 100644
index 7ddbb3b2..00000000
--- a/3rdparty/benchmark/test/state_assembly_test.cc
+++ /dev/null
@@ -1,68 +0,0 @@
-#include <benchmark/benchmark.h>
-
-#ifdef __clang__
-#pragma clang diagnostic ignored "-Wreturn-type"
-#endif
-
-// clang-format off
-extern "C" {
-  extern int ExternInt;
-  benchmark::State& GetState();
-  void Fn();
-}
-// clang-format on
-
-using benchmark::State;
-
-// CHECK-LABEL: test_for_auto_loop:
-extern "C" int test_for_auto_loop() {
-  State& S = GetState();
-  int x = 42;
-  // CHECK: 	[[CALL:call(q)*]]	_ZN9benchmark5State16StartKeepRunningEv
-  // CHECK-NEXT: testq %rbx, %rbx
-  // CHECK-NEXT: je [[LOOP_END:.*]]
-
-  for (auto _ : S) {
-    // CHECK: .L[[LOOP_HEAD:[a-zA-Z0-9_]+]]:
-    // CHECK-GNU-NEXT: subq $1, %rbx
-    // CHECK-CLANG-NEXT: {{(addq \$1, %rax|incq %rax|addq \$-1, %rbx)}}
-    // CHECK-NEXT: jne .L[[LOOP_HEAD]]
-    benchmark::DoNotOptimize(x);
-  }
-  // CHECK: [[LOOP_END]]:
-  // CHECK: [[CALL]]	_ZN9benchmark5State17FinishKeepRunningEv
-
-  // CHECK: movl $101, %eax
-  // CHECK: ret
-  return 101;
-}
-
-// CHECK-LABEL: test_while_loop:
-extern "C" int test_while_loop() {
-  State& S = GetState();
-  int x = 42;
-
-  // CHECK: j{{(e|mp)}} .L[[LOOP_HEADER:[a-zA-Z0-9_]+]]
-  // CHECK-NEXT: .L[[LOOP_BODY:[a-zA-Z0-9_]+]]:
-  while (S.KeepRunning()) {
-    // CHECK-GNU-NEXT: subq $1, %[[IREG:[a-z]+]]
-    // CHECK-CLANG-NEXT: {{(addq \$-1,|decq)}} %[[IREG:[a-z]+]]
-    // CHECK: movq %[[IREG]], [[DEST:.*]]
-    benchmark::DoNotOptimize(x);
-  }
-  // CHECK-DAG: movq [[DEST]], %[[IREG]]
-  // CHECK-DAG: testq %[[IREG]], %[[IREG]]
-  // CHECK-DAG: jne .L[[LOOP_BODY]]
-  // CHECK-DAG: .L[[LOOP_HEADER]]:
-
-  // CHECK: cmpb $0
-  // CHECK-NEXT: jne .L[[LOOP_END:[a-zA-Z0-9_]+]]
-  // CHECK: [[CALL:call(q)*]] _ZN9benchmark5State16StartKeepRunningEv
-
-  // CHECK: .L[[LOOP_END]]:
-  // CHECK: [[CALL]] _ZN9benchmark5State17FinishKeepRunningEv
-
-  // CHECK: movl $101, %eax
-  // CHECK: ret
-  return 101;
-}
diff --git a/3rdparty/benchmark/test/statistics_gtest.cc b/3rdparty/benchmark/test/statistics_gtest.cc
deleted file mode 100644
index 1de2d87d..00000000
--- a/3rdparty/benchmark/test/statistics_gtest.cc
+++ /dev/null
@@ -1,35 +0,0 @@
-//===---------------------------------------------------------------------===//
-// statistics_test - Unit tests for src/statistics.cc
-//===---------------------------------------------------------------------===//
-
-#include "../src/statistics.h"
-#include "gtest/gtest.h"
-
-namespace {
-TEST(StatisticsTest, Mean) {
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({42, 42, 42, 42}), 42.0);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({1, 2, 3, 4}), 2.5);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({1, 2, 5, 10, 10, 14}), 7.0);
-}
-
-TEST(StatisticsTest, Median) {
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({42, 42, 42, 42}), 42.0);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({1, 2, 3, 4}), 2.5);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({1, 2, 5, 10, 10}), 5.0);
-}
-
-TEST(StatisticsTest, StdDev) {
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsStdDev({101, 101, 101, 101}), 0.0);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsStdDev({1, 2, 3}), 1.0);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsStdDev({2.5, 2.4, 3.3, 4.2, 5.1}),
-                   1.151086443322134);
-}
-
-TEST(StatisticsTest, CV) {
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsCV({101, 101, 101, 101}), 0.0);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsCV({1, 2, 3}), 1. / 2.);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsCV({2.5, 2.4, 3.3, 4.2, 5.1}),
-                   0.32888184094918121);
-}
-
-}  // end namespace
diff --git a/3rdparty/benchmark/test/string_util_gtest.cc b/3rdparty/benchmark/test/string_util_gtest.cc
deleted file mode 100644
index 698f2d43..00000000
--- a/3rdparty/benchmark/test/string_util_gtest.cc
+++ /dev/null
@@ -1,152 +0,0 @@
-//===---------------------------------------------------------------------===//
-// statistics_test - Unit tests for src/statistics.cc
-//===---------------------------------------------------------------------===//
-
-#include "../src/internal_macros.h"
-#include "../src/string_util.h"
-#include "gtest/gtest.h"
-
-namespace {
-TEST(StringUtilTest, stoul) {
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0ul, benchmark::stoul("0", &pos));
-    EXPECT_EQ(1ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(7ul, benchmark::stoul("7", &pos));
-    EXPECT_EQ(1ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(135ul, benchmark::stoul("135", &pos));
-    EXPECT_EQ(3ul, pos);
-  }
-#if ULONG_MAX == 0xFFFFFFFFul
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0xFFFFFFFFul, benchmark::stoul("4294967295", &pos));
-    EXPECT_EQ(10ul, pos);
-  }
-#elif ULONG_MAX == 0xFFFFFFFFFFFFFFFFul
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0xFFFFFFFFFFFFFFFFul,
-              benchmark::stoul("18446744073709551615", &pos));
-    EXPECT_EQ(20ul, pos);
-  }
-#endif
-  {
-    size_t pos = 0;
-    EXPECT_EQ(10ul, benchmark::stoul("1010", &pos, 2));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(520ul, benchmark::stoul("1010", &pos, 8));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(1010ul, benchmark::stoul("1010", &pos, 10));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(4112ul, benchmark::stoul("1010", &pos, 16));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0xBEEFul, benchmark::stoul("BEEF", &pos, 16));
-    EXPECT_EQ(4ul, pos);
-  }
-#ifndef BENCHMARK_HAS_NO_EXCEPTIONS
-  { ASSERT_THROW(benchmark::stoul("this is a test"), std::invalid_argument); }
-#endif
-}
-
-TEST(StringUtilTest, stoi){{size_t pos = 0;
-EXPECT_EQ(0, benchmark::stoi("0", &pos));
-EXPECT_EQ(1ul, pos);
-}  // namespace
-{
-  size_t pos = 0;
-  EXPECT_EQ(-17, benchmark::stoi("-17", &pos));
-  EXPECT_EQ(3ul, pos);
-}
-{
-  size_t pos = 0;
-  EXPECT_EQ(1357, benchmark::stoi("1357", &pos));
-  EXPECT_EQ(4ul, pos);
-}
-{
-  size_t pos = 0;
-  EXPECT_EQ(10, benchmark::stoi("1010", &pos, 2));
-  EXPECT_EQ(4ul, pos);
-}
-{
-  size_t pos = 0;
-  EXPECT_EQ(520, benchmark::stoi("1010", &pos, 8));
-  EXPECT_EQ(4ul, pos);
-}
-{
-  size_t pos = 0;
-  EXPECT_EQ(1010, benchmark::stoi("1010", &pos, 10));
-  EXPECT_EQ(4ul, pos);
-}
-{
-  size_t pos = 0;
-  EXPECT_EQ(4112, benchmark::stoi("1010", &pos, 16));
-  EXPECT_EQ(4ul, pos);
-}
-{
-  size_t pos = 0;
-  EXPECT_EQ(0xBEEF, benchmark::stoi("BEEF", &pos, 16));
-  EXPECT_EQ(4ul, pos);
-}
-#ifndef BENCHMARK_HAS_NO_EXCEPTIONS
-{ ASSERT_THROW(benchmark::stoi("this is a test"), std::invalid_argument); }
-#endif
-}
-
-TEST(StringUtilTest, stod){{size_t pos = 0;
-EXPECT_EQ(0.0, benchmark::stod("0", &pos));
-EXPECT_EQ(1ul, pos);
-}
-{
-  size_t pos = 0;
-  EXPECT_EQ(-84.0, benchmark::stod("-84", &pos));
-  EXPECT_EQ(3ul, pos);
-}
-{
-  size_t pos = 0;
-  EXPECT_EQ(1234.0, benchmark::stod("1234", &pos));
-  EXPECT_EQ(4ul, pos);
-}
-{
-  size_t pos = 0;
-  EXPECT_EQ(1.5, benchmark::stod("1.5", &pos));
-  EXPECT_EQ(3ul, pos);
-}
-{
-  size_t pos = 0;
-  /* Note: exactly representable as double */
-  EXPECT_EQ(-1.25e+9, benchmark::stod("-1.25e+9", &pos));
-  EXPECT_EQ(8ul, pos);
-}
-#ifndef BENCHMARK_HAS_NO_EXCEPTIONS
-{ ASSERT_THROW(benchmark::stod("this is a test"), std::invalid_argument); }
-#endif
-}
-
-TEST(StringUtilTest, StrSplit) {
-  EXPECT_EQ(benchmark::StrSplit("", ','), std::vector<std::string>{});
-  EXPECT_EQ(benchmark::StrSplit("hello", ','),
-            std::vector<std::string>({"hello"}));
-  EXPECT_EQ(benchmark::StrSplit("hello,there,is,more", ','),
-            std::vector<std::string>({"hello", "there", "is", "more"}));
-}
-
-}  // end namespace
diff --git a/3rdparty/benchmark/test/templated_fixture_test.cc b/3rdparty/benchmark/test/templated_fixture_test.cc
deleted file mode 100644
index af239c3a..00000000
--- a/3rdparty/benchmark/test/templated_fixture_test.cc
+++ /dev/null
@@ -1,28 +0,0 @@
-
-#include <cassert>
-#include <memory>
-
-#include "benchmark/benchmark.h"
-
-template <typename T>
-class MyFixture : public ::benchmark::Fixture {
- public:
-  MyFixture() : data(0) {}
-
-  T data;
-};
-
-BENCHMARK_TEMPLATE_F(MyFixture, Foo, int)(benchmark::State& st) {
-  for (auto _ : st) {
-    data += 1;
-  }
-}
-
-BENCHMARK_TEMPLATE_DEFINE_F(MyFixture, Bar, double)(benchmark::State& st) {
-  for (auto _ : st) {
-    data += 1.0;
-  }
-}
-BENCHMARK_REGISTER_F(MyFixture, Bar);
-
-BENCHMARK_MAIN();
diff --git a/3rdparty/benchmark/test/user_counters_tabular_test.cc b/3rdparty/benchmark/test/user_counters_tabular_test.cc
deleted file mode 100644
index 45ac043d..00000000
--- a/3rdparty/benchmark/test/user_counters_tabular_test.cc
+++ /dev/null
@@ -1,557 +0,0 @@
-
-#undef NDEBUG
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// @todo: <jpmag> this checks the full output at once; the rule for
-// CounterSet1 was failing because it was not matching "^[-]+$".
-// @todo: <jpmag> check that the counters are vertically aligned.
-ADD_CASES(TC_ConsoleOut,
-          {
-              // keeping these lines long improves readability, so:
-              // clang-format off
-    {"^[-]+$", MR_Next},
-    {"^Benchmark %s Time %s CPU %s Iterations %s Bar %s Bat %s Baz %s Foo %s Frob %s Lob$", MR_Next},
-    {"^[-]+$", MR_Next},
-      {"^BM_Counters_Tabular/repeats:2/threads:1 %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-      {"^BM_Counters_Tabular/repeats:2/threads:1 %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-      {"^BM_Counters_Tabular/repeats:2/threads:1_mean %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-      {"^BM_Counters_Tabular/repeats:2/threads:1_median %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-            {"^BM_Counters_Tabular/repeats:2/threads:1_stddev %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-            {"^BM_Counters_Tabular/repeats:2/threads:1_cv %console_percentage_report [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*%$", MR_Next},
-      {"^BM_Counters_Tabular/repeats:2/threads:2 %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-      {"^BM_Counters_Tabular/repeats:2/threads:2 %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-      {"^BM_Counters_Tabular/repeats:2/threads:2_mean %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-      {"^BM_Counters_Tabular/repeats:2/threads:2_median %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-            {"^BM_Counters_Tabular/repeats:2/threads:2_stddev %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-            {"^BM_Counters_Tabular/repeats:2/threads:2_cv %console_percentage_report [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*% [ ]*%percentage[ ]*%$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^Benchmark %s Time %s CPU %s Iterations %s Bar %s Baz %s Foo$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^Benchmark %s Time %s CPU %s Iterations %s Bat %s Baz %s Foo$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$"},
-              // clang-format on
-          });
-ADD_CASES(TC_CSVOut, {{"%csv_header,"
-                       "\"Bar\",\"Bat\",\"Baz\",\"Foo\",\"Frob\",\"Lob\""}});
-
-// ========================================================================= //
-// ------------------------- Tabular Counters Output ----------------------- //
-// ========================================================================= //
-
-void BM_Counters_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {1, bm::Counter::kAvgThreads}},
-      {"Bar", {2, bm::Counter::kAvgThreads}},
-      {"Baz", {4, bm::Counter::kAvgThreads}},
-      {"Bat", {8, bm::Counter::kAvgThreads}},
-      {"Frob", {16, bm::Counter::kAvgThreads}},
-      {"Lob", {32, bm::Counter::kAvgThreads}},
-  });
-}
-BENCHMARK(BM_Counters_Tabular)->ThreadRange(1, 2)->Repetitions(2);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$",
-            MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$",
-            MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"repetition_index\": 1,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:1_mean\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$",
-            MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:1_median\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$",
-            MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:1_stddev\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$",
-            MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:1_cv\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:1\",$",
-            MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"cv\",$", MR_Next},
-           {"\"aggregate_unit\": \"percentage\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 1,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$",
-            MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 2,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 1,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$",
-            MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"repetition_index\": 1,$", MR_Next},
-           {"\"threads\": 2,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:2_median\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 1,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$",
-            MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 2,$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:2_stddev\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 1,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$",
-            MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 2,$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Tabular/repeats:2/threads:2_cv\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 1,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Tabular/repeats:2/threads:2\",$",
-            MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 2,$", MR_Next},
-           {"\"aggregate_name\": \"cv\",$", MR_Next},
-           {"\"aggregate_unit\": \"percentage\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_Tabular/repeats:2/threads:1\",%csv_report,"
-            "%float,%float,%float,%float,%float,%float$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_Tabular/repeats:2/threads:1\",%csv_report,"
-            "%float,%float,%float,%float,%float,%float$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_Tabular/repeats:2/threads:1_mean\",%csv_report,"
-            "%float,%float,%float,%float,%float,%float$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_Tabular/repeats:2/threads:1_median\",%csv_report,"
-            "%float,%float,%float,%float,%float,%float$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_Tabular/repeats:2/threads:1_stddev\",%csv_report,"
-            "%float,%float,%float,%float,%float,%float$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_Tabular/repeats:2/threads:1_cv\",%csv_report,"
-            "%float,%float,%float,%float,%float,%float$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_Tabular/repeats:2/threads:2\",%csv_report,"
-            "%float,%float,%float,%float,%float,%float$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_Tabular/repeats:2/threads:2\",%csv_report,"
-            "%float,%float,%float,%float,%float,%float$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_Tabular/repeats:2/threads:2_mean\",%csv_report,"
-            "%float,%float,%float,%float,%float,%float$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_Tabular/repeats:2/threads:2_median\",%csv_report,"
-            "%float,%float,%float,%float,%float,%float$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_Tabular/repeats:2/threads:2_stddev\",%csv_report,"
-            "%float,%float,%float,%float,%float,%float$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_Tabular/repeats:2/threads:2_cv\",%csv_report,"
-            "%float,%float,%float,%float,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckTabular(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 1);
-  CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 2);
-  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 4);
-  CHECK_COUNTER_VALUE(e, int, "Bat", EQ, 8);
-  CHECK_COUNTER_VALUE(e, int, "Frob", EQ, 16);
-  CHECK_COUNTER_VALUE(e, int, "Lob", EQ, 32);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Tabular/repeats:2/threads:1$",
-                        &CheckTabular);
-CHECK_BENCHMARK_RESULTS("BM_Counters_Tabular/repeats:2/threads:2$",
-                        &CheckTabular);
-
-// ========================================================================= //
-// -------------------- Tabular+Rate Counters Output ----------------------- //
-// ========================================================================= //
-
-void BM_CounterRates_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-    // This test requires a non-zero CPU time to avoid divide-by-zero
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {1, bm::Counter::kAvgThreadsRate}},
-      {"Bar", {2, bm::Counter::kAvgThreadsRate}},
-      {"Baz", {4, bm::Counter::kAvgThreadsRate}},
-      {"Bat", {8, bm::Counter::kAvgThreadsRate}},
-      {"Frob", {16, bm::Counter::kAvgThreadsRate}},
-      {"Lob", {32, bm::Counter::kAvgThreadsRate}},
-  });
-}
-BENCHMARK(BM_CounterRates_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_CounterRates_Tabular/threads:%int\",$"},
-           {"\"family_index\": 1,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_CounterRates_Tabular/threads:%int\",$",
-            MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_CounterRates_Tabular/threads:%int\",%csv_report,"
-                       "%float,%float,%float,%float,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckTabularRate(Results const& e) {
-  double t = e.DurationCPUTime();
-  CHECK_FLOAT_COUNTER_VALUE(e, "Foo", EQ, 1. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Bar", EQ, 2. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Baz", EQ, 4. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Bat", EQ, 8. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Frob", EQ, 16. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Lob", EQ, 32. / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_CounterRates_Tabular/threads:%int",
-                        &CheckTabularRate);
-
-// ========================================================================= //
-// ------------------------- Tabular Counters Output ----------------------- //
-// ========================================================================= //
-
-// set only some of the counters
-void BM_CounterSet0_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {10, bm::Counter::kAvgThreads}},
-      {"Bar", {20, bm::Counter::kAvgThreads}},
-      {"Baz", {40, bm::Counter::kAvgThreads}},
-  });
-}
-BENCHMARK(BM_CounterSet0_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_CounterSet0_Tabular/threads:%int\",$"},
-           {"\"family_index\": 2,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_CounterSet0_Tabular/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet0_Tabular/threads:%int\",%csv_report,"
-                       "%float,,%float,%float,,"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckSet0(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 10);
-  CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 20);
-  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 40);
-}
-CHECK_BENCHMARK_RESULTS("BM_CounterSet0_Tabular", &CheckSet0);
-
-// again.
-void BM_CounterSet1_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {15, bm::Counter::kAvgThreads}},
-      {"Bar", {25, bm::Counter::kAvgThreads}},
-      {"Baz", {45, bm::Counter::kAvgThreads}},
-  });
-}
-BENCHMARK(BM_CounterSet1_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_CounterSet1_Tabular/threads:%int\",$"},
-           {"\"family_index\": 3,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_CounterSet1_Tabular/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet1_Tabular/threads:%int\",%csv_report,"
-                       "%float,,%float,%float,,"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckSet1(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 15);
-  CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 25);
-  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 45);
-}
-CHECK_BENCHMARK_RESULTS("BM_CounterSet1_Tabular/threads:%int", &CheckSet1);
-
-// ========================================================================= //
-// ------------------------- Tabular Counters Output ----------------------- //
-// ========================================================================= //
-
-// set only some of the counters, different set now.
-void BM_CounterSet2_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {10, bm::Counter::kAvgThreads}},
-      {"Bat", {30, bm::Counter::kAvgThreads}},
-      {"Baz", {40, bm::Counter::kAvgThreads}},
-  });
-}
-BENCHMARK(BM_CounterSet2_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_CounterSet2_Tabular/threads:%int\",$"},
-           {"\"family_index\": 4,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_CounterSet2_Tabular/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet2_Tabular/threads:%int\",%csv_report,"
-                       ",%float,%float,%float,,"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckSet2(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 10);
-  CHECK_COUNTER_VALUE(e, int, "Bat", EQ, 30);
-  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 40);
-}
-CHECK_BENCHMARK_RESULTS("BM_CounterSet2_Tabular", &CheckSet2);
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/test/user_counters_test.cc b/3rdparty/benchmark/test/user_counters_test.cc
deleted file mode 100644
index 1cc74552..00000000
--- a/3rdparty/benchmark/test/user_counters_test.cc
+++ /dev/null
@@ -1,555 +0,0 @@
-
-#undef NDEBUG
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// ========================================================================= //
-// ---------------------- Testing Prologue Output -------------------------- //
-// ========================================================================= //
-
-// clang-format off
-
-ADD_CASES(TC_ConsoleOut,
-          {{"^[-]+$", MR_Next},
-           {"^Benchmark %s Time %s CPU %s Iterations UserCounters...$", MR_Next},
-           {"^[-]+$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"%csv_header,\"bar\",\"foo\""}});
-
-// clang-format on
-
-// ========================================================================= //
-// ------------------------- Simple Counters Output ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_Simple(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.counters["foo"] = 1;
-  state.counters["bar"] = 2 * static_cast<double>(state.iterations());
-}
-BENCHMARK(BM_Counters_Simple);
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_Counters_Simple %console_report bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_Simple\",$"},
-                       {"\"family_index\": 0,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Counters_Simple\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"bar\": %float,$", MR_Next},
-                       {"\"foo\": %float$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Simple\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckSimple(Results const& e) {
-  double its = e.NumIterations();
-  CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
-  // check that the value of bar is within 0.1% of the expected value
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. * its, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Simple", &CheckSimple);
-
-// ========================================================================= //
-// --------------------- Counters+Items+Bytes/s Output --------------------- //
-// ========================================================================= //
-
-namespace {
-int num_calls1 = 0;
-}
-void BM_Counters_WithBytesAndItemsPSec(benchmark::State& state) {
-  for (auto _ : state) {
-    // This test requires a non-zero CPU time to avoid divide-by-zero
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  state.counters["foo"] = 1;
-  state.counters["bar"] = ++num_calls1;
-  state.SetBytesProcessed(364);
-  state.SetItemsProcessed(150);
-}
-BENCHMARK(BM_Counters_WithBytesAndItemsPSec);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_WithBytesAndItemsPSec %console_report "
-                           "bar=%hrfloat bytes_per_second=%hrfloat/s "
-                           "foo=%hrfloat items_per_second=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_WithBytesAndItemsPSec\",$"},
-           {"\"family_index\": 1,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_WithBytesAndItemsPSec\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"bytes_per_second\": %float,$", MR_Next},
-           {"\"foo\": %float,$", MR_Next},
-           {"\"items_per_second\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_WithBytesAndItemsPSec\","
-                       "%csv_bytes_items_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckBytesAndItemsPSec(Results const& e) {
-  double t = e.DurationCPUTime();  // this (and not real time) is the time used
-  CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
-  CHECK_COUNTER_VALUE(e, int, "bar", EQ, num_calls1);
-  // check that the values are within 0.1% of the expected values
-  CHECK_FLOAT_RESULT_VALUE(e, "bytes_per_second", EQ, 364. / t, 0.001);
-  CHECK_FLOAT_RESULT_VALUE(e, "items_per_second", EQ, 150. / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_WithBytesAndItemsPSec",
-                        &CheckBytesAndItemsPSec);
-
-// ========================================================================= //
-// ------------------------- Rate Counters Output -------------------------- //
-// ========================================================================= //
-
-void BM_Counters_Rate(benchmark::State& state) {
-  for (auto _ : state) {
-    // This test requires a non-zero CPU time to avoid divide-by-zero
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kIsRate};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kIsRate};
-}
-BENCHMARK(BM_Counters_Rate);
-ADD_CASES(
-    TC_ConsoleOut,
-    {{"^BM_Counters_Rate %console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_Rate\",$"},
-                       {"\"family_index\": 2,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Counters_Rate\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"bar\": %float,$", MR_Next},
-                       {"\"foo\": %float$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Rate\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckRate(Results const& e) {
-  double t = e.DurationCPUTime();  // this (and not real time) is the time used
-  // check that the values are within 0.1% of the expected values
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Rate", &CheckRate);
-
-// ========================================================================= //
-// ----------------------- Inverted Counters Output ------------------------ //
-// ========================================================================= //
-
-void BM_Invert(benchmark::State& state) {
-  for (auto _ : state) {
-    // This test requires a non-zero CPU time to avoid divide-by-zero
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{0.0001, bm::Counter::kInvert};
-  state.counters["bar"] = bm::Counter{10000, bm::Counter::kInvert};
-}
-BENCHMARK(BM_Invert);
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_Invert %console_report bar=%hrfloatu foo=%hrfloatk$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Invert\",$"},
-                       {"\"family_index\": 3,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_Invert\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 1,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"bar\": %float,$", MR_Next},
-                       {"\"foo\": %float$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Invert\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckInvert(Results const& e) {
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 10000, 0.0001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 0.0001, 0.0001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Invert", &CheckInvert);
-
-// ========================================================================= //
-// ------------------------- InvertedRate Counters Output
-// -------------------------- //
-// ========================================================================= //
-
-void BM_Counters_InvertedRate(benchmark::State& state) {
-  for (auto _ : state) {
-    // This test requires a non-zero CPU time to avoid divide-by-zero
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] =
-      bm::Counter{1, bm::Counter::kIsRate | bm::Counter::kInvert};
-  state.counters["bar"] =
-      bm::Counter{8192, bm::Counter::kIsRate | bm::Counter::kInvert};
-}
-BENCHMARK(BM_Counters_InvertedRate);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_InvertedRate %console_report "
-                           "bar=%hrfloats foo=%hrfloats$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_InvertedRate\",$"},
-           {"\"family_index\": 4,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_InvertedRate\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_InvertedRate\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckInvertedRate(Results const& e) {
-  double t = e.DurationCPUTime();  // this (and not real time) is the time used
-  // check that the values are within 0.1% of the expected values
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, t / 8192.0, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_InvertedRate", &CheckInvertedRate);
-
-// ========================================================================= //
-// ------------------------- Thread Counters Output ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_Threads(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.counters["foo"] = 1;
-  state.counters["bar"] = 2;
-}
-BENCHMARK(BM_Counters_Threads)->ThreadRange(1, 8);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_Threads/threads:%int %console_report "
-                           "bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Threads/threads:%int\",$"},
-           {"\"family_index\": 5,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Threads/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(
-    TC_CSVOut,
-    {{"^\"BM_Counters_Threads/threads:%int\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckThreads(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "foo", EQ, e.NumThreads());
-  CHECK_COUNTER_VALUE(e, int, "bar", EQ, 2 * e.NumThreads());
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Threads/threads:%int", &CheckThreads);
-
-// ========================================================================= //
-// ---------------------- ThreadAvg Counters Output ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_AvgThreads(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgThreads};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgThreads};
-}
-BENCHMARK(BM_Counters_AvgThreads)->ThreadRange(1, 8);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgThreads/threads:%int "
-                           "%console_report bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_AvgThreads/threads:%int\",$"},
-           {"\"family_index\": 6,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_AvgThreads/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(
-    TC_CSVOut,
-    {{"^\"BM_Counters_AvgThreads/threads:%int\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckAvgThreads(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
-  CHECK_COUNTER_VALUE(e, int, "bar", EQ, 2);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_AvgThreads/threads:%int",
-                        &CheckAvgThreads);
-
-// ========================================================================= //
-// ---------------------- ThreadAvg Counters Output ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_AvgThreadsRate(benchmark::State& state) {
-  for (auto _ : state) {
-    // This test requires a non-zero CPU time to avoid divide-by-zero
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgThreadsRate};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgThreadsRate};
-}
-BENCHMARK(BM_Counters_AvgThreadsRate)->ThreadRange(1, 8);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgThreadsRate/threads:%int "
-                           "%console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_AvgThreadsRate/threads:%int\",$"},
-           {"\"family_index\": 7,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_AvgThreadsRate/threads:%int\",$",
-            MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_AvgThreadsRate/"
-                       "threads:%int\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckAvgThreadsRate(Results const& e) {
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / e.DurationCPUTime(), 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / e.DurationCPUTime(), 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_AvgThreadsRate/threads:%int",
-                        &CheckAvgThreadsRate);
-
-// ========================================================================= //
-// ------------------- IterationInvariant Counters Output ------------------ //
-// ========================================================================= //
-
-void BM_Counters_IterationInvariant(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kIsIterationInvariant};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kIsIterationInvariant};
-}
-BENCHMARK(BM_Counters_IterationInvariant);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_IterationInvariant %console_report "
-                           "bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_IterationInvariant\",$"},
-           {"\"family_index\": 8,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_IterationInvariant\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_IterationInvariant\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckIterationInvariant(Results const& e) {
-  double its = e.NumIterations();
-  // check that the values are within 0.1% of the expected value
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, its, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. * its, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_IterationInvariant",
-                        &CheckIterationInvariant);
-
-// ========================================================================= //
-// ----------------- IterationInvariantRate Counters Output ---------------- //
-// ========================================================================= //
-
-void BM_Counters_kIsIterationInvariantRate(benchmark::State& state) {
-  for (auto _ : state) {
-    // This test requires a non-zero CPU time to avoid divide-by-zero
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] =
-      bm::Counter{1, bm::Counter::kIsIterationInvariantRate};
-  state.counters["bar"] =
-      bm::Counter{2, bm::Counter::kIsRate | bm::Counter::kIsIterationInvariant};
-}
-BENCHMARK(BM_Counters_kIsIterationInvariantRate);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_kIsIterationInvariantRate "
-                           "%console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_kIsIterationInvariantRate\",$"},
-           {"\"family_index\": 9,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_kIsIterationInvariantRate\",$",
-            MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_kIsIterationInvariantRate\",%csv_report,"
-                       "%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckIsIterationInvariantRate(Results const& e) {
-  double its = e.NumIterations();
-  double t = e.DurationCPUTime();  // this (and not real time) is the time used
-  // check that the values are within 0.1% of the expected values
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, its * 1. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, its * 2. / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_kIsIterationInvariantRate",
-                        &CheckIsIterationInvariantRate);
-
-// ========================================================================= //
-// ------------------- AvgIterations Counters Output ------------------ //
-// ========================================================================= //
-
-void BM_Counters_AvgIterations(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgIterations};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgIterations};
-}
-BENCHMARK(BM_Counters_AvgIterations);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgIterations %console_report "
-                           "bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_AvgIterations\",$"},
-           {"\"family_index\": 10,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_AvgIterations\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_AvgIterations\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckAvgIterations(Results const& e) {
-  double its = e.NumIterations();
-  // check that the values are within 0.1% of the expected value
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / its, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / its, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_AvgIterations", &CheckAvgIterations);
-
-// ========================================================================= //
-// ----------------- AvgIterationsRate Counters Output ---------------- //
-// ========================================================================= //
-
-void BM_Counters_kAvgIterationsRate(benchmark::State& state) {
-  for (auto _ : state) {
-    // This test requires a non-zero CPU time to avoid divide-by-zero
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgIterationsRate};
-  state.counters["bar"] =
-      bm::Counter{2, bm::Counter::kIsRate | bm::Counter::kAvgIterations};
-}
-BENCHMARK(BM_Counters_kAvgIterationsRate);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_kAvgIterationsRate "
-                           "%console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_kAvgIterationsRate\",$"},
-           {"\"family_index\": 11,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_kAvgIterationsRate\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 1,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_kAvgIterationsRate\",%csv_report,"
-                       "%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckAvgIterationsRate(Results const& e) {
-  double its = e.NumIterations();
-  double t = e.DurationCPUTime();  // this (and not real time) is the time used
-  // check that the values are within 0.1% of the expected values
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / its / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / its / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_kAvgIterationsRate",
-                        &CheckAvgIterationsRate);
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/test/user_counters_thousands_test.cc b/3rdparty/benchmark/test/user_counters_thousands_test.cc
deleted file mode 100644
index a42683b3..00000000
--- a/3rdparty/benchmark/test/user_counters_thousands_test.cc
+++ /dev/null
@@ -1,186 +0,0 @@
-
-#undef NDEBUG
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// ========================================================================= //
-// ------------------------ Thousands Customisation ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_Thousands(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"t0_1000000DefaultBase",
-       bm::Counter(1000 * 1000, bm::Counter::kDefaults)},
-      {"t1_1000000Base1000", bm::Counter(1000 * 1000, bm::Counter::kDefaults,
-                                         benchmark::Counter::OneK::kIs1000)},
-      {"t2_1000000Base1024", bm::Counter(1000 * 1000, bm::Counter::kDefaults,
-                                         benchmark::Counter::OneK::kIs1024)},
-      {"t3_1048576Base1000", bm::Counter(1024 * 1024, bm::Counter::kDefaults,
-                                         benchmark::Counter::OneK::kIs1000)},
-      {"t4_1048576Base1024", bm::Counter(1024 * 1024, bm::Counter::kDefaults,
-                                         benchmark::Counter::OneK::kIs1024)},
-  });
-}
-BENCHMARK(BM_Counters_Thousands)->Repetitions(2);
-ADD_CASES(
-    TC_ConsoleOut,
-    {
-        {"^BM_Counters_Thousands/repeats:2 %console_report "
-         "t0_1000000DefaultBase=1000k "
-         "t1_1000000Base1000=1000k t2_1000000Base1024=976.56[23]k "
-         "t3_1048576Base1000=1048.58k t4_1048576Base1024=1024k$"},
-        {"^BM_Counters_Thousands/repeats:2 %console_report "
-         "t0_1000000DefaultBase=1000k "
-         "t1_1000000Base1000=1000k t2_1000000Base1024=976.56[23]k "
-         "t3_1048576Base1000=1048.58k t4_1048576Base1024=1024k$"},
-        {"^BM_Counters_Thousands/repeats:2_mean %console_report "
-         "t0_1000000DefaultBase=1000k t1_1000000Base1000=1000k "
-         "t2_1000000Base1024=976.56[23]k t3_1048576Base1000=1048.58k "
-         "t4_1048576Base1024=1024k$"},
-        {"^BM_Counters_Thousands/repeats:2_median %console_report "
-         "t0_1000000DefaultBase=1000k t1_1000000Base1000=1000k "
-         "t2_1000000Base1024=976.56[23]k t3_1048576Base1000=1048.58k "
-         "t4_1048576Base1024=1024k$"},
-        {"^BM_Counters_Thousands/repeats:2_stddev %console_time_only_report [ "
-         "]*2 t0_1000000DefaultBase=0 t1_1000000Base1000=0 "
-         "t2_1000000Base1024=0 t3_1048576Base1000=0 t4_1048576Base1024=0$"},
-    });
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"repetition_index\": 1,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2_mean\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2_median\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2_stddev\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"aggregate_unit\": \"time\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 0\\.(0)*e\\+(0)*,$", MR_Next},
-           {"\"t1_1000000Base1000\": 0\\.(0)*e\\+(0)*,$", MR_Next},
-           {"\"t2_1000000Base1024\": 0\\.(0)*e\\+(0)*,$", MR_Next},
-           {"\"t3_1048576Base1000\": 0\\.(0)*e\\+(0)*,$", MR_Next},
-           {"\"t4_1048576Base1024\": 0\\.(0)*e\\+(0)*$", MR_Next},
-           {"}", MR_Next}});
-
-ADD_CASES(
-    TC_CSVOut,
-    {{"^\"BM_Counters_Thousands/"
-      "repeats:2\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\.04858e\\+("
-      "0)*6,1\\.04858e\\+(0)*6$"},
-     {"^\"BM_Counters_Thousands/"
-      "repeats:2\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\.04858e\\+("
-      "0)*6,1\\.04858e\\+(0)*6$"},
-     {"^\"BM_Counters_Thousands/"
-      "repeats:2_mean\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\."
-      "04858e\\+(0)*6,1\\.04858e\\+(0)*6$"},
-     {"^\"BM_Counters_Thousands/"
-      "repeats:2_median\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\."
-      "04858e\\+(0)*6,1\\.04858e\\+(0)*6$"},
-     {"^\"BM_Counters_Thousands/repeats:2_stddev\",%csv_report,0,0,0,0,0$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckThousands(Results const& e) {
-  if (e.name != "BM_Counters_Thousands/repeats:2")
-    return;  // Do not check the aggregates!
-
-  // check that the values are within 0.01% of the expected values
-  CHECK_FLOAT_COUNTER_VALUE(e, "t0_1000000DefaultBase", EQ, 1000 * 1000,
-                            0.0001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "t1_1000000Base1000", EQ, 1000 * 1000, 0.0001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "t2_1000000Base1024", EQ, 1000 * 1000, 0.0001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "t3_1048576Base1000", EQ, 1024 * 1024, 0.0001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "t4_1048576Base1024", EQ, 1024 * 1024, 0.0001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Thousands", &CheckThousands);
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/3rdparty/benchmark/tools/BUILD.bazel b/3rdparty/benchmark/tools/BUILD.bazel
deleted file mode 100644
index 5895883a..00000000
--- a/3rdparty/benchmark/tools/BUILD.bazel
+++ /dev/null
@@ -1,19 +0,0 @@
-load("@py_deps//:requirements.bzl", "requirement")
-
-py_library(
-    name = "gbench",
-    srcs = glob(["gbench/*.py"]),
-    deps = [
-      requirement("numpy"),
-      requirement("scipy"),
-    ],
-)
-
-py_binary(
-    name = "compare",
-    srcs = ["compare.py"],
-    python_version = "PY2",
-    deps = [
-        ":gbench",
-    ],
-)
diff --git a/3rdparty/benchmark/tools/compare.py b/3rdparty/benchmark/tools/compare.py
deleted file mode 100644
index 01d2c89f..00000000
--- a/3rdparty/benchmark/tools/compare.py
+++ /dev/null
@@ -1,429 +0,0 @@
-#!/usr/bin/env python
-
-import unittest
-"""
-compare.py - versatile benchmark output compare tool
-"""
-
-import argparse
-from argparse import ArgumentParser
-import json
-import sys
-import gbench
-from gbench import util, report
-from gbench.util import *
-
-
-def check_inputs(in1, in2, flags):
-    """
-    Perform checking on the user provided inputs and diagnose any abnormalities
-    """
-    in1_kind, in1_err = classify_input_file(in1)
-    in2_kind, in2_err = classify_input_file(in2)
-    output_file = find_benchmark_flag('--benchmark_out=', flags)
-    output_type = find_benchmark_flag('--benchmark_out_format=', flags)
-    if in1_kind == IT_Executable and in2_kind == IT_Executable and output_file:
-        print(("WARNING: '--benchmark_out=%s' will be passed to both "
-               "benchmarks causing it to be overwritten") % output_file)
-    if in1_kind == IT_JSON and in2_kind == IT_JSON and len(flags) > 0:
-        print("WARNING: passing optional flags has no effect since both "
-              "inputs are JSON")
-    if output_type is not None and output_type != 'json':
-        print(("ERROR: passing '--benchmark_out_format=%s' to 'compare.py`"
-               " is not supported.") % output_type)
-        sys.exit(1)
-
-
-def create_parser():
-    parser = ArgumentParser(
-        description='versatile benchmark output compare tool')
-
-    parser.add_argument(
-        '-a',
-        '--display_aggregates_only',
-        dest='display_aggregates_only',
-        action="store_true",
-        help="If there are repetitions, by default, we display everything - the"
-             " actual runs, and the aggregates computed. Sometimes, it is "
-             "desirable to only view the aggregates. E.g. when there are a lot "
-             "of repetitions. Do note that only the display is affected. "
-             "Internally, all the actual runs are still used, e.g. for U test.")
-
-    parser.add_argument(
-        '--no-color',
-        dest='color',
-        default=True,
-        action="store_false",
-        help="Do not use colors in the terminal output"
-    )
-
-    parser.add_argument(
-        '-d',
-        '--dump_to_json',
-        dest='dump_to_json',
-        help="Additionally, dump benchmark comparison output to this file in JSON format.")
-
-    utest = parser.add_argument_group()
-    utest.add_argument(
-        '--no-utest',
-        dest='utest',
-        default=True,
-        action="store_false",
-        help="The tool can do a two-tailed Mann-Whitney U test with the null hypothesis that it is equally likely that a randomly selected value from one sample will be less than or greater than a randomly selected value from a second sample.\nWARNING: requires **LARGE** (no less than {}) number of repetitions to be meaningful!\nThe test is being done by default, if at least {} repetitions were done.\nThis option can disable the U Test.".format(report.UTEST_OPTIMAL_REPETITIONS, report.UTEST_MIN_REPETITIONS))
-    alpha_default = 0.05
-    utest.add_argument(
-        "--alpha",
-        dest='utest_alpha',
-        default=alpha_default,
-        type=float,
-        help=("significance level alpha. if the calculated p-value is below this value, then the result is said to be statistically significant and the null hypothesis is rejected.\n(default: %0.4f)") %
-        alpha_default)
-
-    subparsers = parser.add_subparsers(
-        help='This tool has multiple modes of operation:',
-        dest='mode')
-
-    parser_a = subparsers.add_parser(
-        'benchmarks',
-        help='The most simple use-case, compare all the output of these two benchmarks')
-    baseline = parser_a.add_argument_group(
-        'baseline', 'The benchmark baseline')
-    baseline.add_argument(
-        'test_baseline',
-        metavar='test_baseline',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='A benchmark executable or JSON output file')
-    contender = parser_a.add_argument_group(
-        'contender', 'The benchmark that will be compared against the baseline')
-    contender.add_argument(
-        'test_contender',
-        metavar='test_contender',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='A benchmark executable or JSON output file')
-    parser_a.add_argument(
-        'benchmark_options',
-        metavar='benchmark_options',
-        nargs=argparse.REMAINDER,
-        help='Arguments to pass when running benchmark executables')
-
-    parser_b = subparsers.add_parser(
-        'filters', help='Compare filter one with the filter two of benchmark')
-    baseline = parser_b.add_argument_group(
-        'baseline', 'The benchmark baseline')
-    baseline.add_argument(
-        'test',
-        metavar='test',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='A benchmark executable or JSON output file')
-    baseline.add_argument(
-        'filter_baseline',
-        metavar='filter_baseline',
-        type=str,
-        nargs=1,
-        help='The first filter, that will be used as baseline')
-    contender = parser_b.add_argument_group(
-        'contender', 'The benchmark that will be compared against the baseline')
-    contender.add_argument(
-        'filter_contender',
-        metavar='filter_contender',
-        type=str,
-        nargs=1,
-        help='The second filter, that will be compared against the baseline')
-    parser_b.add_argument(
-        'benchmark_options',
-        metavar='benchmark_options',
-        nargs=argparse.REMAINDER,
-        help='Arguments to pass when running benchmark executables')
-
-    parser_c = subparsers.add_parser(
-        'benchmarksfiltered',
-        help='Compare filter one of first benchmark with filter two of the second benchmark')
-    baseline = parser_c.add_argument_group(
-        'baseline', 'The benchmark baseline')
-    baseline.add_argument(
-        'test_baseline',
-        metavar='test_baseline',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='A benchmark executable or JSON output file')
-    baseline.add_argument(
-        'filter_baseline',
-        metavar='filter_baseline',
-        type=str,
-        nargs=1,
-        help='The first filter, that will be used as baseline')
-    contender = parser_c.add_argument_group(
-        'contender', 'The benchmark that will be compared against the baseline')
-    contender.add_argument(
-        'test_contender',
-        metavar='test_contender',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='The second benchmark executable or JSON output file, that will be compared against the baseline')
-    contender.add_argument(
-        'filter_contender',
-        metavar='filter_contender',
-        type=str,
-        nargs=1,
-        help='The second filter, that will be compared against the baseline')
-    parser_c.add_argument(
-        'benchmark_options',
-        metavar='benchmark_options',
-        nargs=argparse.REMAINDER,
-        help='Arguments to pass when running benchmark executables')
-
-    return parser
-
-
-def main():
-    # Parse the command line flags
-    parser = create_parser()
-    args, unknown_args = parser.parse_known_args()
-    if args.mode is None:
-        parser.print_help()
-        exit(1)
-    assert not unknown_args
-    benchmark_options = args.benchmark_options
-
-    if args.mode == 'benchmarks':
-        test_baseline = args.test_baseline[0].name
-        test_contender = args.test_contender[0].name
-        filter_baseline = ''
-        filter_contender = ''
-
-        # NOTE: if test_baseline == test_contender, you are analyzing the stdev
-
-        description = 'Comparing %s to %s' % (test_baseline, test_contender)
-    elif args.mode == 'filters':
-        test_baseline = args.test[0].name
-        test_contender = args.test[0].name
-        filter_baseline = args.filter_baseline[0]
-        filter_contender = args.filter_contender[0]
-
-        # NOTE: if filter_baseline == filter_contender, you are analyzing the
-        # stdev
-
-        description = 'Comparing %s to %s (from %s)' % (
-            filter_baseline, filter_contender, args.test[0].name)
-    elif args.mode == 'benchmarksfiltered':
-        test_baseline = args.test_baseline[0].name
-        test_contender = args.test_contender[0].name
-        filter_baseline = args.filter_baseline[0]
-        filter_contender = args.filter_contender[0]
-
-        # NOTE: if test_baseline == test_contender and
-        # filter_baseline == filter_contender, you are analyzing the stdev
-
-        description = 'Comparing %s (from %s) to %s (from %s)' % (
-            filter_baseline, test_baseline, filter_contender, test_contender)
-    else:
-        # should never happen
-        print("Unrecognized mode of operation: '%s'" % args.mode)
-        parser.print_help()
-        exit(1)
-
-    check_inputs(test_baseline, test_contender, benchmark_options)
-
-    if args.display_aggregates_only:
-        benchmark_options += ['--benchmark_display_aggregates_only=true']
-
-    options_baseline = []
-    options_contender = []
-
-    if filter_baseline and filter_contender:
-        options_baseline = ['--benchmark_filter=%s' % filter_baseline]
-        options_contender = ['--benchmark_filter=%s' % filter_contender]
-
-    # Run the benchmarks and report the results
-    json1 = json1_orig = gbench.util.sort_benchmark_results(gbench.util.run_or_load_benchmark(
-        test_baseline, benchmark_options + options_baseline))
-    json2 = json2_orig = gbench.util.sort_benchmark_results(gbench.util.run_or_load_benchmark(
-        test_contender, benchmark_options + options_contender))
-
-    # Now, filter the benchmarks so that the difference report can work
-    if filter_baseline and filter_contender:
-        replacement = '[%s vs. %s]' % (filter_baseline, filter_contender)
-        json1 = gbench.report.filter_benchmark(
-            json1_orig, filter_baseline, replacement)
-        json2 = gbench.report.filter_benchmark(
-            json2_orig, filter_contender, replacement)
-
-    diff_report = gbench.report.get_difference_report(
-        json1, json2, args.utest)
-    output_lines = gbench.report.print_difference_report(
-        diff_report,
-        args.display_aggregates_only,
-        args.utest, args.utest_alpha, args.color)
-    print(description)
-    for ln in output_lines:
-        print(ln)
-
-    # Optionally, diff and output to JSON
-    if args.dump_to_json is not None:
-        with open(args.dump_to_json, 'w') as f_json:
-            json.dump(diff_report, f_json)
-
-class TestParser(unittest.TestCase):
-    def setUp(self):
-        self.parser = create_parser()
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'gbench',
-            'Inputs')
-        self.testInput0 = os.path.join(testInputs, 'test1_run1.json')
-        self.testInput1 = os.path.join(testInputs, 'test1_run2.json')
-
-    def test_benchmarks_basic(self):
-        parsed = self.parser.parse_args(
-            ['benchmarks', self.testInput0, self.testInput1])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_basic_without_utest(self):
-        parsed = self.parser.parse_args(
-            ['--no-utest', 'benchmarks', self.testInput0, self.testInput1])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertFalse(parsed.utest)
-        self.assertEqual(parsed.utest_alpha, 0.05)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_basic_display_aggregates_only(self):
-        parsed = self.parser.parse_args(
-            ['-a', 'benchmarks', self.testInput0, self.testInput1])
-        self.assertTrue(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_basic_with_utest_alpha(self):
-        parsed = self.parser.parse_args(
-            ['--alpha=0.314', 'benchmarks', self.testInput0, self.testInput1])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.utest_alpha, 0.314)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_basic_without_utest_with_utest_alpha(self):
-        parsed = self.parser.parse_args(
-            ['--no-utest', '--alpha=0.314', 'benchmarks', self.testInput0, self.testInput1])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertFalse(parsed.utest)
-        self.assertEqual(parsed.utest_alpha, 0.314)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_with_remainder(self):
-        parsed = self.parser.parse_args(
-            ['benchmarks', self.testInput0, self.testInput1, 'd'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.benchmark_options, ['d'])
-
-    def test_benchmarks_with_remainder_after_doubleminus(self):
-        parsed = self.parser.parse_args(
-            ['benchmarks', self.testInput0, self.testInput1, '--', 'e'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.benchmark_options, ['e'])
-
-    def test_filters_basic(self):
-        parsed = self.parser.parse_args(
-            ['filters', self.testInput0, 'c', 'd'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'filters')
-        self.assertEqual(parsed.test[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.filter_contender[0], 'd')
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_filters_with_remainder(self):
-        parsed = self.parser.parse_args(
-            ['filters', self.testInput0, 'c', 'd', 'e'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'filters')
-        self.assertEqual(parsed.test[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.filter_contender[0], 'd')
-        self.assertEqual(parsed.benchmark_options, ['e'])
-
-    def test_filters_with_remainder_after_doubleminus(self):
-        parsed = self.parser.parse_args(
-            ['filters', self.testInput0, 'c', 'd', '--', 'f'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'filters')
-        self.assertEqual(parsed.test[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.filter_contender[0], 'd')
-        self.assertEqual(parsed.benchmark_options, ['f'])
-
-    def test_benchmarksfiltered_basic(self):
-        parsed = self.parser.parse_args(
-            ['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarksfiltered')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.filter_contender[0], 'e')
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarksfiltered_with_remainder(self):
-        parsed = self.parser.parse_args(
-            ['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e', 'f'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarksfiltered')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.filter_contender[0], 'e')
-        self.assertEqual(parsed.benchmark_options[0], 'f')
-
-    def test_benchmarksfiltered_with_remainder_after_doubleminus(self):
-        parsed = self.parser.parse_args(
-            ['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e', '--', 'g'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarksfiltered')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.filter_contender[0], 'e')
-        self.assertEqual(parsed.benchmark_options[0], 'g')
-
-
-if __name__ == '__main__':
-    # unittest.main()
-    main()
-
-# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
-# kate: tab-width: 4; replace-tabs on; indent-width 4; tab-indents: off;
-# kate: indent-mode python; remove-trailing-spaces modified;
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test1_run1.json b/3rdparty/benchmark/tools/gbench/Inputs/test1_run1.json
deleted file mode 100644
index 601e327a..00000000
--- a/3rdparty/benchmark/tools/gbench/Inputs/test1_run1.json
+++ /dev/null
@@ -1,119 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_SameTimes",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 10,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_2xFaster",
-      "iterations": 1000,
-      "real_time": 50,
-      "cpu_time": 50,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_2xSlower",
-      "iterations": 1000,
-      "real_time": 50,
-      "cpu_time": 50,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_1PercentFaster",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_1PercentSlower",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentFaster",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentSlower",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_100xSlower",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_100xFaster",
-      "iterations": 1000,
-      "real_time": 10000,
-      "cpu_time": 10000,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentCPUToTime",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_ThirdFaster",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "MyComplexityTest_BigO",
-      "run_name": "MyComplexityTest",
-      "run_type": "aggregate",
-      "aggregate_name": "BigO",
-      "cpu_coefficient": 4.2749856294592886e+00,
-      "real_coefficient": 6.4789275289789780e+00,
-      "big_o": "N",
-      "time_unit": "ns"
-    },
-    {
-      "name": "MyComplexityTest_RMS",
-      "run_name": "MyComplexityTest",
-      "run_type": "aggregate",
-      "aggregate_name": "RMS",
-      "rms": 4.5097802512472874e-03
-    },
-    {
-      "name": "BM_NotBadTimeUnit",
-      "iterations": 1000,
-      "real_time": 0.4,
-      "cpu_time": 0.5,
-      "time_unit": "s"
-    },
-    {
-      "name": "BM_DifferentTimeUnit",
-      "iterations": 1,
-      "real_time": 1,
-      "cpu_time": 1,
-      "time_unit": "s"
-    }
-  ]
-}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test1_run2.json b/3rdparty/benchmark/tools/gbench/Inputs/test1_run2.json
deleted file mode 100644
index 3cbcf39b..00000000
--- a/3rdparty/benchmark/tools/gbench/Inputs/test1_run2.json
+++ /dev/null
@@ -1,119 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_SameTimes",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 10,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_2xFaster",
-      "iterations": 1000,
-      "real_time": 25,
-      "cpu_time": 25,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_2xSlower",
-      "iterations": 20833333,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_1PercentFaster",
-      "iterations": 1000,
-      "real_time": 98.9999999,
-      "cpu_time": 98.9999999,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_1PercentSlower",
-      "iterations": 1000,
-      "real_time": 100.9999999,
-      "cpu_time": 100.9999999,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentFaster",
-      "iterations": 1000,
-      "real_time": 90,
-      "cpu_time": 90,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentSlower",
-      "iterations": 1000,
-      "real_time": 110,
-      "cpu_time": 110,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_100xSlower",
-      "iterations": 1000,
-      "real_time": 1.0000e+04,
-      "cpu_time": 1.0000e+04,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_100xFaster",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentCPUToTime",
-      "iterations": 1000,
-      "real_time": 110,
-      "cpu_time": 90,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_ThirdFaster",
-      "iterations": 1000,
-      "real_time": 66.665,
-      "cpu_time": 66.664,
-      "time_unit": "ns"
-    },
-    {
-      "name": "MyComplexityTest_BigO",
-      "run_name": "MyComplexityTest",
-      "run_type": "aggregate",
-      "aggregate_name": "BigO",
-      "cpu_coefficient": 5.6215779594361486e+00,
-      "real_coefficient": 5.6288314793554610e+00,
-      "big_o": "N",
-      "time_unit": "ns"
-    },
-    {
-      "name": "MyComplexityTest_RMS",
-      "run_name": "MyComplexityTest",
-      "run_type": "aggregate",
-      "aggregate_name": "RMS",
-      "rms": 3.3128901852342174e-03
-    },
-    {
-      "name": "BM_NotBadTimeUnit",
-      "iterations": 1000,
-      "real_time": 0.04,
-      "cpu_time": 0.6,
-      "time_unit": "s"
-    },
-    {
-      "name": "BM_DifferentTimeUnit",
-      "iterations": 1,
-      "real_time": 1,
-      "cpu_time": 1,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test2_run.json b/3rdparty/benchmark/tools/gbench/Inputs/test2_run.json
deleted file mode 100644
index 15bc6980..00000000
--- a/3rdparty/benchmark/tools/gbench/Inputs/test2_run.json
+++ /dev/null
@@ -1,81 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_Hi",
-      "iterations": 1234,
-      "real_time": 42,
-      "cpu_time": 24,
-      "time_unit": "ms"
-    },
-    {
-      "name": "BM_Zero",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 10,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Zero/4",
-      "iterations": 4000,
-      "real_time": 40,
-      "cpu_time": 40,
-      "time_unit": "ns"
-    },
-    {
-      "name": "Prefix/BM_Zero",
-      "iterations": 2000,
-      "real_time": 20,
-      "cpu_time": 20,
-      "time_unit": "ns"
-    },
-    {
-      "name": "Prefix/BM_Zero/3",
-      "iterations": 3000,
-      "real_time": 30,
-      "cpu_time": 30,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_One",
-      "iterations": 5000,
-      "real_time": 5,
-      "cpu_time": 5,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_One/4",
-      "iterations": 2000,
-      "real_time": 20,
-      "cpu_time": 20,
-      "time_unit": "ns"
-    },
-    {
-      "name": "Prefix/BM_One",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 10,
-      "time_unit": "ns"
-    },
-    {
-      "name": "Prefix/BM_One/3",
-      "iterations": 1500,
-      "real_time": 15,
-      "cpu_time": 15,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Bye",
-      "iterations": 5321,
-      "real_time": 11,
-      "cpu_time": 63,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test3_run0.json b/3rdparty/benchmark/tools/gbench/Inputs/test3_run0.json
deleted file mode 100644
index 49f8b061..00000000
--- a/3rdparty/benchmark/tools/gbench/Inputs/test3_run0.json
+++ /dev/null
@@ -1,65 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_One",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Two",
-      "iterations": 1000,
-      "real_time": 9,
-      "cpu_time": 90,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Two",
-      "iterations": 1000,
-      "real_time": 8,
-      "cpu_time": 86,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 8,
-      "cpu_time": 80,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 8,
-      "cpu_time": 77,
-      "time_unit": "ns"
-    },
-    {
-      "name": "medium",
-      "run_type": "iteration",
-      "iterations": 1000,
-      "real_time": 8,
-      "cpu_time": 80,
-      "time_unit": "ns"
-    },
-    {
-      "name": "medium",
-      "run_type": "iteration",
-      "iterations": 1000,
-      "real_time": 9,
-      "cpu_time": 82,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test3_run1.json b/3rdparty/benchmark/tools/gbench/Inputs/test3_run1.json
deleted file mode 100644
index acc5ba17..00000000
--- a/3rdparty/benchmark/tools/gbench/Inputs/test3_run1.json
+++ /dev/null
@@ -1,65 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_One",
-      "iterations": 1000,
-      "real_time": 9,
-      "cpu_time": 110,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Two",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 89,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Two",
-      "iterations": 1000,
-      "real_time": 7,
-      "cpu_time": 72,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 7,
-      "cpu_time": 75,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "aggregate",
-      "iterations": 762,
-      "real_time": 4.54,
-      "cpu_time": 66.6,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "iteration",
-      "iterations": 1000,
-      "real_time": 800,
-      "cpu_time": 1,
-      "time_unit": "ns"
-    },
-    {
-      "name": "medium",
-      "run_type": "iteration",
-      "iterations": 1200,
-      "real_time": 5,
-      "cpu_time": 53,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test4_run.json b/3rdparty/benchmark/tools/gbench/Inputs/test4_run.json
deleted file mode 100644
index eaa005f3..00000000
--- a/3rdparty/benchmark/tools/gbench/Inputs/test4_run.json
+++ /dev/null
@@ -1,96 +0,0 @@
-{
-  "benchmarks": [
-    {
-      "name": "99 family 0 instance 0 repetition 0",
-      "run_type": "iteration",
-      "family_index": 0,
-      "per_family_instance_index": 0,
-      "repetition_index": 0
-    },
-    {
-      "name": "98 family 0 instance 0 repetition 1",
-      "run_type": "iteration",
-      "family_index": 0,
-      "per_family_instance_index": 0,
-      "repetition_index": 1
-    },
-    {
-      "name": "97 family 0 instance 0 aggregate",
-      "run_type": "aggregate",
-      "family_index": 0,
-      "per_family_instance_index": 0,
-      "aggregate_name": "9 aggregate"
-    },
-
-
-    {
-      "name": "96 family 0 instance 1 repetition 0",
-      "run_type": "iteration",
-      "family_index": 0,
-      "per_family_instance_index": 1,
-      "repetition_index": 0
-    },
-    {
-      "name": "95 family 0 instance 1 repetition 1",
-      "run_type": "iteration",
-      "family_index": 0,
-      "per_family_instance_index": 1,
-      "repetition_index": 1
-    },
-    {
-      "name": "94 family 0 instance 1 aggregate",
-      "run_type": "aggregate",
-      "family_index": 0,
-      "per_family_instance_index": 1,
-      "aggregate_name": "9 aggregate"
-    },
-
-
-
-
-    {
-      "name": "93 family 1 instance 0 repetition 0",
-      "run_type": "iteration",
-      "family_index": 1,
-      "per_family_instance_index": 0,
-      "repetition_index": 0
-    },
-    {
-      "name": "92 family 1 instance 0 repetition 1",
-      "run_type": "iteration",
-      "family_index": 1,
-      "per_family_instance_index": 0,
-      "repetition_index": 1
-    },
-    {
-      "name": "91 family 1 instance 0 aggregate",
-      "run_type": "aggregate",
-      "family_index": 1,
-      "per_family_instance_index": 0,
-      "aggregate_name": "9 aggregate"
-    },
-
-
-    {
-      "name": "90 family 1 instance 1 repetition 0",
-      "run_type": "iteration",
-      "family_index": 1,
-      "per_family_instance_index": 1,
-      "repetition_index": 0
-    },
-    {
-      "name": "89 family 1 instance 1 repetition 1",
-      "run_type": "iteration",
-      "family_index": 1,
-      "per_family_instance_index": 1,
-      "repetition_index": 1
-    },
-    {
-      "name": "88 family 1 instance 1 aggregate",
-      "run_type": "aggregate",
-      "family_index": 1,
-      "per_family_instance_index": 1,
-      "aggregate_name": "9 aggregate"
-    }
-  ]
-}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test4_run0.json b/3rdparty/benchmark/tools/gbench/Inputs/test4_run0.json
deleted file mode 100644
index 54cf1275..00000000
--- a/3rdparty/benchmark/tools/gbench/Inputs/test4_run0.json
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "whocares",
-      "run_type": "aggregate",
-      "aggregate_name": "zz",
-      "aggregate_unit": "percentage",
-      "iterations": 1000,
-      "real_time": 0.01,
-      "cpu_time": 0.10,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/3rdparty/benchmark/tools/gbench/Inputs/test4_run1.json b/3rdparty/benchmark/tools/gbench/Inputs/test4_run1.json
deleted file mode 100644
index 25d56050..00000000
--- a/3rdparty/benchmark/tools/gbench/Inputs/test4_run1.json
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "whocares",
-      "run_type": "aggregate",
-      "aggregate_name": "zz",
-      "aggregate_unit": "percentage",
-      "iterations": 1000,
-      "real_time": 0.005,
-      "cpu_time": 0.15,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/3rdparty/benchmark/tools/gbench/__init__.py b/3rdparty/benchmark/tools/gbench/__init__.py
deleted file mode 100644
index fce1a1ac..00000000
--- a/3rdparty/benchmark/tools/gbench/__init__.py
+++ /dev/null
@@ -1,8 +0,0 @@
-"""Google Benchmark tooling"""
-
-__author__ = 'Eric Fiselier'
-__email__ = 'eric@efcs.ca'
-__versioninfo__ = (0, 5, 0)
-__version__ = '.'.join(str(v) for v in __versioninfo__) + 'dev'
-
-__all__ = []
diff --git a/3rdparty/benchmark/tools/gbench/report.py b/3rdparty/benchmark/tools/gbench/report.py
deleted file mode 100644
index 4c798baf..00000000
--- a/3rdparty/benchmark/tools/gbench/report.py
+++ /dev/null
@@ -1,1144 +0,0 @@
-"""report.py - Utilities for reporting statistics about benchmark results
-"""
-
-import unittest
-import os
-import re
-import copy
-import random
-
-from scipy.stats import mannwhitneyu, gmean
-from numpy import array
-from pandas import Timedelta
-
-
-class BenchmarkColor(object):
-    def __init__(self, name, code):
-        self.name = name
-        self.code = code
-
-    def __repr__(self):
-        return '%s%r' % (self.__class__.__name__,
-                         (self.name, self.code))
-
-    def __format__(self, format):
-        return self.code
-
-
-# Benchmark Colors Enumeration
-BC_NONE = BenchmarkColor('NONE', '')
-BC_MAGENTA = BenchmarkColor('MAGENTA', '\033[95m')
-BC_CYAN = BenchmarkColor('CYAN', '\033[96m')
-BC_OKBLUE = BenchmarkColor('OKBLUE', '\033[94m')
-BC_OKGREEN = BenchmarkColor('OKGREEN', '\033[32m')
-BC_HEADER = BenchmarkColor('HEADER', '\033[92m')
-BC_WARNING = BenchmarkColor('WARNING', '\033[93m')
-BC_WHITE = BenchmarkColor('WHITE', '\033[97m')
-BC_FAIL = BenchmarkColor('FAIL', '\033[91m')
-BC_ENDC = BenchmarkColor('ENDC', '\033[0m')
-BC_BOLD = BenchmarkColor('BOLD', '\033[1m')
-BC_UNDERLINE = BenchmarkColor('UNDERLINE', '\033[4m')
-
-UTEST_MIN_REPETITIONS = 2
-UTEST_OPTIMAL_REPETITIONS = 9  # Lowest reasonable number, More is better.
-UTEST_COL_NAME = "_pvalue"
-
-
-def color_format(use_color, fmt_str, *args, **kwargs):
-    """
-    Return the result of 'fmt_str.format(*args, **kwargs)' after transforming
-    'args' and 'kwargs' according to the value of 'use_color'. If 'use_color'
-    is False then all color codes in 'args' and 'kwargs' are replaced with
-    the empty string.
-    """
-    assert use_color is True or use_color is False
-    if not use_color:
-        args = [arg if not isinstance(arg, BenchmarkColor) else BC_NONE
-                for arg in args]
-        kwargs = {key: arg if not isinstance(arg, BenchmarkColor) else BC_NONE
-                  for key, arg in kwargs.items()}
-    return fmt_str.format(*args, **kwargs)
-
-
-def find_longest_name(benchmark_list):
-    """
-    Return the length of the longest benchmark name in a given list of
-    benchmark JSON objects
-    """
-    longest_name = 1
-    for bc in benchmark_list:
-        if len(bc['name']) > longest_name:
-            longest_name = len(bc['name'])
-    return longest_name
-
-
-def calculate_change(old_val, new_val):
-    """
-    Return a float representing the decimal change between old_val and new_val.
-    """
-    if old_val == 0 and new_val == 0:
-        return 0.0
-    if old_val == 0:
-        return float(new_val - old_val) / (float(old_val + new_val) / 2)
-    return float(new_val - old_val) / abs(old_val)
-
-
-def filter_benchmark(json_orig, family, replacement=""):
-    """
-    Apply a filter to the json, and only leave the 'family' of benchmarks.
-    """
-    regex = re.compile(family)
-    filtered = {}
-    filtered['benchmarks'] = []
-    for be in json_orig['benchmarks']:
-        if not regex.search(be['name']):
-            continue
-        filteredbench = copy.deepcopy(be)  # Do NOT modify the old name!
-        filteredbench['name'] = regex.sub(replacement, filteredbench['name'])
-        filtered['benchmarks'].append(filteredbench)
-    return filtered
-
-
-def get_unique_benchmark_names(json):
-    """
-    While *keeping* the order, give all the unique 'names' used for benchmarks.
-    """
-    seen = set()
-    uniqued = [x['name'] for x in json['benchmarks']
-               if x['name'] not in seen and
-               (seen.add(x['name']) or True)]
-    return uniqued
-
-
-def intersect(list1, list2):
-    """
-    Given two lists, get a new list consisting of the elements only contained
-    in *both of the input lists*, while preserving the ordering.
-    """
-    return [x for x in list1 if x in list2]
-
-
-def is_potentially_comparable_benchmark(x):
-    return ('time_unit' in x and 'real_time' in x and 'cpu_time' in x)
-
-
-def partition_benchmarks(json1, json2):
-    """
-    While preserving the ordering, find benchmarks with the same names in
-    both of the inputs, and group them.
-    (i.e. partition/filter into groups with common name)
-    """
-    json1_unique_names = get_unique_benchmark_names(json1)
-    json2_unique_names = get_unique_benchmark_names(json2)
-    names = intersect(json1_unique_names, json2_unique_names)
-    partitions = []
-    for name in names:
-        time_unit = None
-        # Pick the time unit from the first entry of the lhs benchmark.
-        # We should be careful not to crash with unexpected input.
-        for x in json1['benchmarks']:
-            if (x['name'] == name and is_potentially_comparable_benchmark(x)):
-                time_unit = x['time_unit']
-                break
-        if time_unit is None:
-            continue
-        # Filter by name and time unit.
-        # All the repetitions are assumed to be comparable.
-        lhs = [x for x in json1['benchmarks'] if x['name'] == name and
-               x['time_unit'] == time_unit]
-        rhs = [x for x in json2['benchmarks'] if x['name'] == name and
-               x['time_unit'] == time_unit]
-        partitions.append([lhs, rhs])
-    return partitions
-
-
-def get_timedelta_field_as_seconds(benchmark, field_name):
-    """
-    Get value of field_name field of benchmark, which is time with time unit
-    time_unit, as time in seconds.
-    """
-    time_unit = benchmark['time_unit'] if 'time_unit' in benchmark else 's'
-    dt = Timedelta(benchmark[field_name], time_unit)
-    return dt / Timedelta(1, 's')
-
-
-def calculate_geomean(json):
-    """
-    Extract all real/cpu times from all the benchmarks as seconds,
-    and calculate their geomean.
-    """
-    times = []
-    for benchmark in json['benchmarks']:
-        if 'run_type' in benchmark and benchmark['run_type'] == 'aggregate':
-            continue
-        times.append([get_timedelta_field_as_seconds(benchmark, 'real_time'),
-                      get_timedelta_field_as_seconds(benchmark, 'cpu_time')])
-    return gmean(times) if times else array([])
-
-
-def extract_field(partition, field_name):
-    # The count of elements may be different. We want *all* of them.
-    lhs = [x[field_name] for x in partition[0]]
-    rhs = [x[field_name] for x in partition[1]]
-    return [lhs, rhs]
-
-
-def calc_utest(timings_cpu, timings_time):
-    min_rep_cnt = min(len(timings_time[0]),
-                      len(timings_time[1]),
-                      len(timings_cpu[0]),
-                      len(timings_cpu[1]))
-
-    # Does *everything* has at least UTEST_MIN_REPETITIONS repetitions?
-    if min_rep_cnt < UTEST_MIN_REPETITIONS:
-        return False, None, None
-
-    time_pvalue = mannwhitneyu(
-        timings_time[0], timings_time[1], alternative='two-sided').pvalue
-    cpu_pvalue = mannwhitneyu(
-        timings_cpu[0], timings_cpu[1], alternative='two-sided').pvalue
-
-    return (min_rep_cnt >= UTEST_OPTIMAL_REPETITIONS), cpu_pvalue, time_pvalue
-
-
-def print_utest(bc_name, utest, utest_alpha, first_col_width, use_color=True):
-    def get_utest_color(pval):
-        return BC_FAIL if pval >= utest_alpha else BC_OKGREEN
-
-    # Check if we failed miserably with minimum required repetitions for utest
-    if not utest['have_optimal_repetitions'] and utest['cpu_pvalue'] is None and utest['time_pvalue'] is None:
-        return []
-
-    dsc = "U Test, Repetitions: {} vs {}".format(
-        utest['nr_of_repetitions'], utest['nr_of_repetitions_other'])
-    dsc_color = BC_OKGREEN
-
-    # We still got some results to show but issue a warning about it.
-    if not utest['have_optimal_repetitions']:
-        dsc_color = BC_WARNING
-        dsc += ". WARNING: Results unreliable! {}+ repetitions recommended.".format(
-            UTEST_OPTIMAL_REPETITIONS)
-
-    special_str = "{}{:<{}s}{endc}{}{:16.4f}{endc}{}{:16.4f}{endc}{}      {}"
-
-    return [color_format(use_color,
-                         special_str,
-                         BC_HEADER,
-                         "{}{}".format(bc_name, UTEST_COL_NAME),
-                         first_col_width,
-                         get_utest_color(
-                             utest['time_pvalue']), utest['time_pvalue'],
-                         get_utest_color(
-                             utest['cpu_pvalue']), utest['cpu_pvalue'],
-                         dsc_color, dsc,
-                         endc=BC_ENDC)]
-
-
-def get_difference_report(
-        json1,
-        json2,
-        utest=False):
-    """
-    Calculate and report the difference between each test of two benchmarks
-    runs specified as 'json1' and 'json2'. Output is another json containing
-    relevant details for each test run.
-    """
-    assert utest is True or utest is False
-
-    diff_report = []
-    partitions = partition_benchmarks(json1, json2)
-    for partition in partitions:
-        benchmark_name = partition[0][0]['name']
-        time_unit = partition[0][0]['time_unit']
-        measurements = []
-        utest_results = {}
-        # Careful, we may have different repetition count.
-        for i in range(min(len(partition[0]), len(partition[1]))):
-            bn = partition[0][i]
-            other_bench = partition[1][i]
-            measurements.append({
-                'real_time': bn['real_time'],
-                'cpu_time': bn['cpu_time'],
-                'real_time_other': other_bench['real_time'],
-                'cpu_time_other': other_bench['cpu_time'],
-                'time': calculate_change(bn['real_time'], other_bench['real_time']),
-                'cpu': calculate_change(bn['cpu_time'], other_bench['cpu_time'])
-            })
-
-        # After processing the whole partition, if requested, do the U test.
-        if utest:
-            timings_cpu = extract_field(partition, 'cpu_time')
-            timings_time = extract_field(partition, 'real_time')
-            have_optimal_repetitions, cpu_pvalue, time_pvalue = calc_utest(
-                timings_cpu, timings_time)
-            if cpu_pvalue and time_pvalue:
-                utest_results = {
-                    'have_optimal_repetitions': have_optimal_repetitions,
-                    'cpu_pvalue': cpu_pvalue,
-                    'time_pvalue': time_pvalue,
-                    'nr_of_repetitions': len(timings_cpu[0]),
-                    'nr_of_repetitions_other': len(timings_cpu[1])
-                }
-
-        # Store only if we had any measurements for given benchmark.
-        # E.g. partition_benchmarks will filter out the benchmarks having
-        # time units which are not compatible with other time units in the
-        # benchmark suite.
-        if measurements:
-            run_type = partition[0][0]['run_type'] if 'run_type' in partition[0][0] else ''
-            aggregate_name = partition[0][0]['aggregate_name'] if run_type == 'aggregate' and 'aggregate_name' in partition[0][0] else ''
-            diff_report.append({
-                'name': benchmark_name,
-                'measurements': measurements,
-                'time_unit': time_unit,
-                'run_type': run_type,
-                'aggregate_name': aggregate_name,
-                'utest': utest_results
-            })
-
-    lhs_gmean = calculate_geomean(json1)
-    rhs_gmean = calculate_geomean(json2)
-    if lhs_gmean.any() and rhs_gmean.any():
-        diff_report.append({
-            'name': 'OVERALL_GEOMEAN',
-            'measurements': [{
-                'real_time': lhs_gmean[0],
-                'cpu_time': lhs_gmean[1],
-                'real_time_other': rhs_gmean[0],
-                'cpu_time_other': rhs_gmean[1],
-                'time': calculate_change(lhs_gmean[0], rhs_gmean[0]),
-                'cpu': calculate_change(lhs_gmean[1], rhs_gmean[1])
-            }],
-            'time_unit': 's',
-            'run_type': 'aggregate',
-            'aggregate_name': 'geomean',
-            'utest': {}
-        })
-
-    return diff_report
-
-
-def print_difference_report(
-        json_diff_report,
-        include_aggregates_only=False,
-        utest=False,
-        utest_alpha=0.05,
-        use_color=True):
-    """
-    Calculate and report the difference between each test of two benchmarks
-    runs specified as 'json1' and 'json2'.
-    """
-    assert utest is True or utest is False
-
-    def get_color(res):
-        if res > 0.05:
-            return BC_FAIL
-        elif res > -0.07:
-            return BC_WHITE
-        else:
-            return BC_CYAN
-
-    first_col_width = find_longest_name(json_diff_report)
-    first_col_width = max(
-        first_col_width,
-        len('Benchmark'))
-    first_col_width += len(UTEST_COL_NAME)
-    first_line = "{:<{}s}Time             CPU      Time Old      Time New       CPU Old       CPU New".format(
-        'Benchmark', 12 + first_col_width)
-    output_strs = [first_line, '-' * len(first_line)]
-
-    fmt_str = "{}{:<{}s}{endc}{}{:+16.4f}{endc}{}{:+16.4f}{endc}{:14.0f}{:14.0f}{endc}{:14.0f}{:14.0f}"
-    for benchmark in json_diff_report:
-        # *If* we were asked to only include aggregates,
-        # and if it is non-aggregate, then don't print it.
-        if not include_aggregates_only or not 'run_type' in benchmark or benchmark['run_type'] == 'aggregate':
-            for measurement in benchmark['measurements']:
-                output_strs += [color_format(use_color,
-                                             fmt_str,
-                                             BC_HEADER,
-                                             benchmark['name'],
-                                             first_col_width,
-                                             get_color(measurement['time']),
-                                             measurement['time'],
-                                             get_color(measurement['cpu']),
-                                             measurement['cpu'],
-                                             measurement['real_time'],
-                                             measurement['real_time_other'],
-                                             measurement['cpu_time'],
-                                             measurement['cpu_time_other'],
-                                             endc=BC_ENDC)]
-
-        # After processing the measurements, if requested and
-        # if applicable (e.g. u-test exists for given benchmark),
-        # print the U test.
-        if utest and benchmark['utest']:
-            output_strs += print_utest(benchmark['name'],
-                                       benchmark['utest'],
-                                       utest_alpha=utest_alpha,
-                                       first_col_width=first_col_width,
-                                       use_color=use_color)
-
-    return output_strs
-
-
-###############################################################################
-# Unit tests
-
-
-class TestGetUniqueBenchmarkNames(unittest.TestCase):
-    def load_results(self):
-        import json
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'Inputs')
-        testOutput = os.path.join(testInputs, 'test3_run0.json')
-        with open(testOutput, 'r') as f:
-            json = json.load(f)
-        return json
-
-    def test_basic(self):
-        expect_lines = [
-            'BM_One',
-            'BM_Two',
-            'short',  # These two are not sorted
-            'medium',  # These two are not sorted
-        ]
-        json = self.load_results()
-        output_lines = get_unique_benchmark_names(json)
-        print("\n")
-        print("\n".join(output_lines))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            self.assertEqual(expect_lines[i], output_lines[i])
-
-
-class TestReportDifference(unittest.TestCase):
-    @classmethod
-    def setUpClass(cls):
-        def load_results():
-            import json
-            testInputs = os.path.join(
-                os.path.dirname(
-                    os.path.realpath(__file__)),
-                'Inputs')
-            testOutput1 = os.path.join(testInputs, 'test1_run1.json')
-            testOutput2 = os.path.join(testInputs, 'test1_run2.json')
-            with open(testOutput1, 'r') as f:
-                json1 = json.load(f)
-            with open(testOutput2, 'r') as f:
-                json2 = json.load(f)
-            return json1, json2
-
-        json1, json2 = load_results()
-        cls.json_diff_report = get_difference_report(json1, json2)
-
-    def test_json_diff_report_pretty_printing(self):
-        expect_lines = [
-            ['BM_SameTimes', '+0.0000', '+0.0000', '10', '10', '10', '10'],
-            ['BM_2xFaster', '-0.5000', '-0.5000', '50', '25', '50', '25'],
-            ['BM_2xSlower', '+1.0000', '+1.0000', '50', '100', '50', '100'],
-            ['BM_1PercentFaster', '-0.0100', '-0.0100', '100', '99', '100', '99'],
-            ['BM_1PercentSlower', '+0.0100', '+0.0100', '100', '101', '100', '101'],
-            ['BM_10PercentFaster', '-0.1000', '-0.1000', '100', '90', '100', '90'],
-            ['BM_10PercentSlower', '+0.1000', '+0.1000', '100', '110', '100', '110'],
-            ['BM_100xSlower', '+99.0000', '+99.0000',
-                '100', '10000', '100', '10000'],
-            ['BM_100xFaster', '-0.9900', '-0.9900',
-                '10000', '100', '10000', '100'],
-            ['BM_10PercentCPUToTime', '+0.1000',
-                '-0.1000', '100', '110', '100', '90'],
-            ['BM_ThirdFaster', '-0.3333', '-0.3334', '100', '67', '100', '67'],
-            ['BM_NotBadTimeUnit', '-0.9000', '+0.2000', '0', '0', '0', '1'],
-            ['OVERALL_GEOMEAN', '-0.8344', '-0.8026', '0', '0', '0', '0']
-        ]
-        output_lines_with_header = print_difference_report(
-            self.json_diff_report, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(len(parts), 7)
-            self.assertEqual(expect_lines[i], parts)
-
-    def test_json_diff_report_output(self):
-        expected_output = [
-            {
-                'name': 'BM_SameTimes',
-                'measurements': [{'time': 0.0000, 'cpu': 0.0000, 'real_time': 10, 'real_time_other': 10, 'cpu_time': 10, 'cpu_time_other': 10}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': 'BM_2xFaster',
-                'measurements': [{'time': -0.5000, 'cpu': -0.5000, 'real_time': 50, 'real_time_other': 25, 'cpu_time': 50, 'cpu_time_other': 25}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': 'BM_2xSlower',
-                'measurements': [{'time': 1.0000, 'cpu': 1.0000, 'real_time': 50, 'real_time_other': 100, 'cpu_time': 50, 'cpu_time_other': 100}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': 'BM_1PercentFaster',
-                'measurements': [{'time': -0.0100, 'cpu': -0.0100, 'real_time': 100, 'real_time_other': 98.9999999, 'cpu_time': 100, 'cpu_time_other': 98.9999999}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': 'BM_1PercentSlower',
-                'measurements': [{'time': 0.0100, 'cpu': 0.0100, 'real_time': 100, 'real_time_other': 101, 'cpu_time': 100, 'cpu_time_other': 101}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': 'BM_10PercentFaster',
-                'measurements': [{'time': -0.1000, 'cpu': -0.1000, 'real_time': 100, 'real_time_other': 90, 'cpu_time': 100, 'cpu_time_other': 90}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': 'BM_10PercentSlower',
-                'measurements': [{'time': 0.1000, 'cpu': 0.1000, 'real_time': 100, 'real_time_other': 110, 'cpu_time': 100, 'cpu_time_other': 110}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': 'BM_100xSlower',
-                'measurements': [{'time': 99.0000, 'cpu': 99.0000, 'real_time': 100, 'real_time_other': 10000, 'cpu_time': 100, 'cpu_time_other': 10000}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': 'BM_100xFaster',
-                'measurements': [{'time': -0.9900, 'cpu': -0.9900, 'real_time': 10000, 'real_time_other': 100, 'cpu_time': 10000, 'cpu_time_other': 100}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': 'BM_10PercentCPUToTime',
-                'measurements': [{'time': 0.1000, 'cpu': -0.1000, 'real_time': 100, 'real_time_other': 110, 'cpu_time': 100, 'cpu_time_other': 90}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': 'BM_ThirdFaster',
-                'measurements': [{'time': -0.3333, 'cpu': -0.3334, 'real_time': 100, 'real_time_other': 67, 'cpu_time': 100, 'cpu_time_other': 67}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': 'BM_NotBadTimeUnit',
-                'measurements': [{'time': -0.9000, 'cpu': 0.2000, 'real_time': 0.4, 'real_time_other': 0.04, 'cpu_time': 0.5, 'cpu_time_other': 0.6}],
-                'time_unit': 's',
-                'utest': {}
-            },
-            {
-                'name': 'OVERALL_GEOMEAN',
-                'measurements': [{'real_time': 1.193776641714438e-06, 'cpu_time': 1.2144445585302297e-06,
-                                  'real_time_other': 1.9768988699420897e-07, 'cpu_time_other': 2.397447755209533e-07,
-                                  'time': -0.834399601997324, 'cpu': -0.8025889499549471}],
-                'time_unit': 's',
-                'run_type': 'aggregate',
-                'aggregate_name': 'geomean', 'utest': {}
-            },
-        ]
-        self.assertEqual(len(self.json_diff_report), len(expected_output))
-        for out, expected in zip(
-                self.json_diff_report, expected_output):
-            self.assertEqual(out['name'], expected['name'])
-            self.assertEqual(out['time_unit'], expected['time_unit'])
-            assert_utest(self, out, expected)
-            assert_measurements(self, out, expected)
-
-
-class TestReportDifferenceBetweenFamilies(unittest.TestCase):
-    @classmethod
-    def setUpClass(cls):
-        def load_result():
-            import json
-            testInputs = os.path.join(
-                os.path.dirname(
-                    os.path.realpath(__file__)),
-                'Inputs')
-            testOutput = os.path.join(testInputs, 'test2_run.json')
-            with open(testOutput, 'r') as f:
-                json = json.load(f)
-            return json
-
-        json = load_result()
-        json1 = filter_benchmark(json, "BM_Z.ro", ".")
-        json2 = filter_benchmark(json, "BM_O.e", ".")
-        cls.json_diff_report = get_difference_report(json1, json2)
-
-    def test_json_diff_report_pretty_printing(self):
-        expect_lines = [
-            ['.', '-0.5000', '-0.5000', '10', '5', '10', '5'],
-            ['./4', '-0.5000', '-0.5000', '40', '20', '40', '20'],
-            ['Prefix/.', '-0.5000', '-0.5000', '20', '10', '20', '10'],
-            ['Prefix/./3', '-0.5000', '-0.5000', '30', '15', '30', '15'],
-            ['OVERALL_GEOMEAN', '-0.5000', '-0.5000', '0', '0', '0', '0']
-        ]
-        output_lines_with_header = print_difference_report(
-            self.json_diff_report, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(len(parts), 7)
-            self.assertEqual(expect_lines[i], parts)
-
-    def test_json_diff_report(self):
-        expected_output = [
-            {
-                'name': u'.',
-                'measurements': [{'time': -0.5, 'cpu': -0.5, 'real_time': 10, 'real_time_other': 5, 'cpu_time': 10, 'cpu_time_other': 5}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': u'./4',
-                'measurements': [{'time': -0.5, 'cpu': -0.5, 'real_time': 40, 'real_time_other': 20, 'cpu_time': 40, 'cpu_time_other': 20}],
-                'time_unit': 'ns',
-                'utest': {},
-            },
-            {
-                'name': u'Prefix/.',
-                'measurements': [{'time': -0.5, 'cpu': -0.5, 'real_time': 20, 'real_time_other': 10, 'cpu_time': 20, 'cpu_time_other': 10}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': u'Prefix/./3',
-                'measurements': [{'time': -0.5, 'cpu': -0.5, 'real_time': 30, 'real_time_other': 15, 'cpu_time': 30, 'cpu_time_other': 15}],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': 'OVERALL_GEOMEAN',
-                'measurements': [{'real_time': 2.213363839400641e-08, 'cpu_time': 2.213363839400641e-08,
-                                  'real_time_other': 1.1066819197003185e-08, 'cpu_time_other': 1.1066819197003185e-08,
-                                  'time': -0.5000000000000009, 'cpu': -0.5000000000000009}],
-                'time_unit': 's',
-                'run_type': 'aggregate',
-                'aggregate_name': 'geomean',
-                'utest': {}
-            }
-        ]
-        self.assertEqual(len(self.json_diff_report), len(expected_output))
-        for out, expected in zip(
-                self.json_diff_report, expected_output):
-            self.assertEqual(out['name'], expected['name'])
-            self.assertEqual(out['time_unit'], expected['time_unit'])
-            assert_utest(self, out, expected)
-            assert_measurements(self, out, expected)
-
-
-class TestReportDifferenceWithUTest(unittest.TestCase):
-    @classmethod
-    def setUpClass(cls):
-        def load_results():
-            import json
-            testInputs = os.path.join(
-                os.path.dirname(
-                    os.path.realpath(__file__)),
-                'Inputs')
-            testOutput1 = os.path.join(testInputs, 'test3_run0.json')
-            testOutput2 = os.path.join(testInputs, 'test3_run1.json')
-            with open(testOutput1, 'r') as f:
-                json1 = json.load(f)
-            with open(testOutput2, 'r') as f:
-                json2 = json.load(f)
-            return json1, json2
-
-        json1, json2 = load_results()
-        cls.json_diff_report = get_difference_report(
-            json1, json2, utest=True)
-
-    def test_json_diff_report_pretty_printing(self):
-        expect_lines = [
-            ['BM_One', '-0.1000', '+0.1000', '10', '9', '100', '110'],
-            ['BM_Two', '+0.1111', '-0.0111', '9', '10', '90', '89'],
-            ['BM_Two', '-0.1250', '-0.1628', '8', '7', '86', '72'],
-            ['BM_Two_pvalue',
-             '1.0000',
-             '0.6667',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '2.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-            ['short', '-0.1250', '-0.0625', '8', '7', '80', '75'],
-            ['short', '-0.4325', '-0.1351', '8', '5', '77', '67'],
-            ['short_pvalue',
-             '0.7671',
-             '0.2000',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '3.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-            ['medium', '-0.3750', '-0.3375', '8', '5', '80', '53'],
-            ['OVERALL_GEOMEAN', '+1.6405', '-0.6985', '0', '0', '0', '0']
-        ]
-        output_lines_with_header = print_difference_report(
-            self.json_diff_report, utest=True, utest_alpha=0.05, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(expect_lines[i], parts)
-
-    def test_json_diff_report_pretty_printing_aggregates_only(self):
-        expect_lines = [
-            ['BM_One', '-0.1000', '+0.1000', '10', '9', '100', '110'],
-            ['BM_Two_pvalue',
-             '1.0000',
-             '0.6667',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '2.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-            ['short', '-0.1250', '-0.0625', '8', '7', '80', '75'],
-            ['short', '-0.4325', '-0.1351', '8', '5', '77', '67'],
-            ['short_pvalue',
-             '0.7671',
-             '0.2000',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '3.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-            ['OVERALL_GEOMEAN', '+1.6405', '-0.6985', '0', '0', '0', '0']
-        ]
-        output_lines_with_header = print_difference_report(
-            self.json_diff_report, include_aggregates_only=True, utest=True, utest_alpha=0.05, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(expect_lines[i], parts)
-
-    def test_json_diff_report(self):
-        expected_output = [
-            {
-                'name': u'BM_One',
-                'measurements': [
-                    {'time': -0.1,
-                     'cpu': 0.1,
-                     'real_time': 10,
-                     'real_time_other': 9,
-                     'cpu_time': 100,
-                     'cpu_time_other': 110}
-                ],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': u'BM_Two',
-                'measurements': [
-                    {'time': 0.1111111111111111,
-                     'cpu': -0.011111111111111112,
-                     'real_time': 9,
-                     'real_time_other': 10,
-                     'cpu_time': 90,
-                     'cpu_time_other': 89},
-                    {'time': -0.125, 'cpu': -0.16279069767441862, 'real_time': 8,
-                        'real_time_other': 7, 'cpu_time': 86, 'cpu_time_other': 72}
-                ],
-                'time_unit': 'ns',
-                'utest': {
-                    'have_optimal_repetitions': False, 'cpu_pvalue': 0.6666666666666666, 'time_pvalue': 1.0
-                }
-            },
-            {
-                'name': u'short',
-                'measurements': [
-                    {'time': -0.125,
-                     'cpu': -0.0625,
-                     'real_time': 8,
-                     'real_time_other': 7,
-                     'cpu_time': 80,
-                     'cpu_time_other': 75},
-                    {'time': -0.4325,
-                     'cpu': -0.13506493506493514,
-                     'real_time': 8,
-                     'real_time_other': 4.54,
-                     'cpu_time': 77,
-                     'cpu_time_other': 66.6}
-                ],
-                'time_unit': 'ns',
-                'utest': {
-                    'have_optimal_repetitions': False, 'cpu_pvalue': 0.2, 'time_pvalue': 0.7670968684102772
-                }
-            },
-            {
-                'name': u'medium',
-                'measurements': [
-                    {'time': -0.375,
-                     'cpu': -0.3375,
-                     'real_time': 8,
-                     'real_time_other': 5,
-                     'cpu_time': 80,
-                     'cpu_time_other': 53}
-                ],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': 'OVERALL_GEOMEAN',
-                'measurements': [{'real_time': 8.48528137423858e-09, 'cpu_time': 8.441336246629233e-08,
-                                  'real_time_other': 2.2405267593145244e-08, 'cpu_time_other': 2.5453661413660466e-08,
-                                  'time': 1.6404861082353634, 'cpu': -0.6984640740519662}],
-                'time_unit': 's',
-                'run_type': 'aggregate',
-                'aggregate_name': 'geomean',
-                'utest': {}
-            }
-        ]
-        self.assertEqual(len(self.json_diff_report), len(expected_output))
-        for out, expected in zip(
-                self.json_diff_report, expected_output):
-            self.assertEqual(out['name'], expected['name'])
-            self.assertEqual(out['time_unit'], expected['time_unit'])
-            assert_utest(self, out, expected)
-            assert_measurements(self, out, expected)
-
-
-class TestReportDifferenceWithUTestWhileDisplayingAggregatesOnly(
-        unittest.TestCase):
-    @classmethod
-    def setUpClass(cls):
-        def load_results():
-            import json
-            testInputs = os.path.join(
-                os.path.dirname(
-                    os.path.realpath(__file__)),
-                'Inputs')
-            testOutput1 = os.path.join(testInputs, 'test3_run0.json')
-            testOutput2 = os.path.join(testInputs, 'test3_run1.json')
-            with open(testOutput1, 'r') as f:
-                json1 = json.load(f)
-            with open(testOutput2, 'r') as f:
-                json2 = json.load(f)
-            return json1, json2
-
-        json1, json2 = load_results()
-        cls.json_diff_report = get_difference_report(
-            json1, json2, utest=True)
-
-    def test_json_diff_report_pretty_printing(self):
-        expect_lines = [
-            ['BM_One', '-0.1000', '+0.1000', '10', '9', '100', '110'],
-            ['BM_Two', '+0.1111', '-0.0111', '9', '10', '90', '89'],
-            ['BM_Two', '-0.1250', '-0.1628', '8', '7', '86', '72'],
-            ['BM_Two_pvalue',
-             '1.0000',
-             '0.6667',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '2.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-            ['short', '-0.1250', '-0.0625', '8', '7', '80', '75'],
-            ['short', '-0.4325', '-0.1351', '8', '5', '77', '67'],
-            ['short_pvalue',
-             '0.7671',
-             '0.2000',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '3.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-            ['medium', '-0.3750', '-0.3375', '8', '5', '80', '53'],
-            ['OVERALL_GEOMEAN', '+1.6405', '-0.6985', '0', '0', '0', '0']
-        ]
-        output_lines_with_header = print_difference_report(
-            self.json_diff_report,
-            utest=True, utest_alpha=0.05, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(expect_lines[i], parts)
-
-    def test_json_diff_report(self):
-        expected_output = [
-            {
-                'name': u'BM_One',
-                'measurements': [
-                    {'time': -0.1,
-                     'cpu': 0.1,
-                     'real_time': 10,
-                     'real_time_other': 9,
-                     'cpu_time': 100,
-                     'cpu_time_other': 110}
-                ],
-                'time_unit': 'ns',
-                'utest': {}
-            },
-            {
-                'name': u'BM_Two',
-                'measurements': [
-                    {'time': 0.1111111111111111,
-                     'cpu': -0.011111111111111112,
-                     'real_time': 9,
-                     'real_time_other': 10,
-                     'cpu_time': 90,
-                     'cpu_time_other': 89},
-                    {'time': -0.125, 'cpu': -0.16279069767441862, 'real_time': 8,
-                        'real_time_other': 7, 'cpu_time': 86, 'cpu_time_other': 72}
-                ],
-                'time_unit': 'ns',
-                'utest': {
-                    'have_optimal_repetitions': False, 'cpu_pvalue': 0.6666666666666666, 'time_pvalue': 1.0
-                }
-            },
-            {
-                'name': u'short',
-                'measurements': [
-                    {'time': -0.125,
-                     'cpu': -0.0625,
-                     'real_time': 8,
-                     'real_time_other': 7,
-                     'cpu_time': 80,
-                     'cpu_time_other': 75},
-                    {'time': -0.4325,
-                     'cpu': -0.13506493506493514,
-                     'real_time': 8,
-                     'real_time_other': 4.54,
-                     'cpu_time': 77,
-                     'cpu_time_other': 66.6}
-                ],
-                'time_unit': 'ns',
-                'utest': {
-                    'have_optimal_repetitions': False, 'cpu_pvalue': 0.2, 'time_pvalue': 0.7670968684102772
-                }
-            },
-            {
-                'name': u'medium',
-                'measurements': [
-                    {'real_time_other': 5,
-                     'cpu_time': 80,
-                     'time': -0.375,
-                     'real_time': 8,
-                     'cpu_time_other': 53,
-                     'cpu': -0.3375
-                     }
-                ],
-                'utest': {},
-                'time_unit': u'ns',
-                'aggregate_name': ''
-            },
-            {
-                'name': 'OVERALL_GEOMEAN',
-                'measurements': [{'real_time': 8.48528137423858e-09, 'cpu_time': 8.441336246629233e-08,
-                                  'real_time_other': 2.2405267593145244e-08, 'cpu_time_other': 2.5453661413660466e-08,
-                                  'time': 1.6404861082353634, 'cpu': -0.6984640740519662}],
-                'time_unit': 's',
-                'run_type': 'aggregate',
-                'aggregate_name': 'geomean',
-                'utest': {}
-            }
-        ]
-        self.assertEqual(len(self.json_diff_report), len(expected_output))
-        for out, expected in zip(
-                self.json_diff_report, expected_output):
-            self.assertEqual(out['name'], expected['name'])
-            self.assertEqual(out['time_unit'], expected['time_unit'])
-            assert_utest(self, out, expected)
-            assert_measurements(self, out, expected)
-
-
-class TestReportDifferenceForPercentageAggregates(
-        unittest.TestCase):
-    @classmethod
-    def setUpClass(cls):
-        def load_results():
-            import json
-            testInputs = os.path.join(
-                os.path.dirname(
-                    os.path.realpath(__file__)),
-                'Inputs')
-            testOutput1 = os.path.join(testInputs, 'test4_run0.json')
-            testOutput2 = os.path.join(testInputs, 'test4_run1.json')
-            with open(testOutput1, 'r') as f:
-                json1 = json.load(f)
-            with open(testOutput2, 'r') as f:
-                json2 = json.load(f)
-            return json1, json2
-
-        json1, json2 = load_results()
-        cls.json_diff_report = get_difference_report(
-            json1, json2, utest=True)
-
-    def test_json_diff_report_pretty_printing(self):
-        expect_lines = [
-            ['whocares', '-0.5000', '+0.5000', '0', '0', '0', '0']
-        ]
-        output_lines_with_header = print_difference_report(
-            self.json_diff_report,
-            utest=True, utest_alpha=0.05, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(expect_lines[i], parts)
-
-    def test_json_diff_report(self):
-        expected_output = [
-            {
-                'name': u'whocares',
-                'measurements': [
-                    {'time': -0.5,
-                     'cpu': 0.5,
-                     'real_time': 0.01,
-                     'real_time_other': 0.005,
-                     'cpu_time': 0.10,
-                     'cpu_time_other': 0.15}
-                ],
-                'time_unit': 'ns',
-                'utest': {}
-            }
-        ]
-        self.assertEqual(len(self.json_diff_report), len(expected_output))
-        for out, expected in zip(
-                self.json_diff_report, expected_output):
-            self.assertEqual(out['name'], expected['name'])
-            self.assertEqual(out['time_unit'], expected['time_unit'])
-            assert_utest(self, out, expected)
-            assert_measurements(self, out, expected)
-
-
-class TestReportSorting(unittest.TestCase):
-    @classmethod
-    def setUpClass(cls):
-        def load_result():
-            import json
-            testInputs = os.path.join(
-                os.path.dirname(
-                    os.path.realpath(__file__)),
-                'Inputs')
-            testOutput = os.path.join(testInputs, 'test4_run.json')
-            with open(testOutput, 'r') as f:
-                json = json.load(f)
-            return json
-
-        cls.json = load_result()
-
-    def test_json_diff_report_pretty_printing(self):
-        import util
-
-        expected_names = [
-            "99 family 0 instance 0 repetition 0",
-            "98 family 0 instance 0 repetition 1",
-            "97 family 0 instance 0 aggregate",
-            "96 family 0 instance 1 repetition 0",
-            "95 family 0 instance 1 repetition 1",
-            "94 family 0 instance 1 aggregate",
-            "93 family 1 instance 0 repetition 0",
-            "92 family 1 instance 0 repetition 1",
-            "91 family 1 instance 0 aggregate",
-            "90 family 1 instance 1 repetition 0",
-            "89 family 1 instance 1 repetition 1",
-            "88 family 1 instance 1 aggregate"
-        ]
-
-        for n in range(len(self.json['benchmarks']) ** 2):
-            random.shuffle(self.json['benchmarks'])
-            sorted_benchmarks = util.sort_benchmark_results(self.json)[
-                'benchmarks']
-            self.assertEqual(len(expected_names), len(sorted_benchmarks))
-            for out, expected in zip(sorted_benchmarks, expected_names):
-                self.assertEqual(out['name'], expected)
-
-
-def assert_utest(unittest_instance, lhs, rhs):
-    if lhs['utest']:
-        unittest_instance.assertAlmostEqual(
-            lhs['utest']['cpu_pvalue'],
-            rhs['utest']['cpu_pvalue'])
-        unittest_instance.assertAlmostEqual(
-            lhs['utest']['time_pvalue'],
-            rhs['utest']['time_pvalue'])
-        unittest_instance.assertEqual(
-            lhs['utest']['have_optimal_repetitions'],
-            rhs['utest']['have_optimal_repetitions'])
-    else:
-        # lhs is empty. assert if rhs is not.
-        unittest_instance.assertEqual(lhs['utest'], rhs['utest'])
-
-
-def assert_measurements(unittest_instance, lhs, rhs):
-    for m1, m2 in zip(lhs['measurements'], rhs['measurements']):
-        unittest_instance.assertEqual(m1['real_time'], m2['real_time'])
-        unittest_instance.assertEqual(m1['cpu_time'], m2['cpu_time'])
-        # m1['time'] and m1['cpu'] hold values which are being calculated,
-        # and therefore we must use almost-equal pattern.
-        unittest_instance.assertAlmostEqual(m1['time'], m2['time'], places=4)
-        unittest_instance.assertAlmostEqual(m1['cpu'], m2['cpu'], places=4)
-
-
-if __name__ == '__main__':
-    unittest.main()
-
-# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
-# kate: tab-width: 4; replace-tabs on; indent-width 4; tab-indents: off;
-# kate: indent-mode python; remove-trailing-spaces modified;
diff --git a/3rdparty/benchmark/tools/gbench/util.py b/3rdparty/benchmark/tools/gbench/util.py
deleted file mode 100644
index 5d0012c0..00000000
--- a/3rdparty/benchmark/tools/gbench/util.py
+++ /dev/null
@@ -1,181 +0,0 @@
-"""util.py - General utilities for running, loading, and processing benchmarks
-"""
-import json
-import os
-import tempfile
-import subprocess
-import sys
-import functools
-
-# Input file type enumeration
-IT_Invalid = 0
-IT_JSON = 1
-IT_Executable = 2
-
-_num_magic_bytes = 2 if sys.platform.startswith('win') else 4
-
-
-def is_executable_file(filename):
-    """
-    Return 'True' if 'filename' names a valid file which is likely
-    an executable. A file is considered an executable if it starts with the
-    magic bytes for a EXE, Mach O, or ELF file.
-    """
-    if not os.path.isfile(filename):
-        return False
-    with open(filename, mode='rb') as f:
-        magic_bytes = f.read(_num_magic_bytes)
-    if sys.platform == 'darwin':
-        return magic_bytes in [
-            b'\xfe\xed\xfa\xce',  # MH_MAGIC
-            b'\xce\xfa\xed\xfe',  # MH_CIGAM
-            b'\xfe\xed\xfa\xcf',  # MH_MAGIC_64
-            b'\xcf\xfa\xed\xfe',  # MH_CIGAM_64
-            b'\xca\xfe\xba\xbe',  # FAT_MAGIC
-            b'\xbe\xba\xfe\xca'   # FAT_CIGAM
-        ]
-    elif sys.platform.startswith('win'):
-        return magic_bytes == b'MZ'
-    else:
-        return magic_bytes == b'\x7FELF'
-
-
-def is_json_file(filename):
-    """
-    Returns 'True' if 'filename' names a valid JSON output file.
-    'False' otherwise.
-    """
-    try:
-        with open(filename, 'r') as f:
-            json.load(f)
-        return True
-    except BaseException:
-        pass
-    return False
-
-
-def classify_input_file(filename):
-    """
-    Return a tuple (type, msg) where 'type' specifies the classified type
-    of 'filename'. If 'type' is 'IT_Invalid' then 'msg' is a human readable
-    string represeting the error.
-    """
-    ftype = IT_Invalid
-    err_msg = None
-    if not os.path.exists(filename):
-        err_msg = "'%s' does not exist" % filename
-    elif not os.path.isfile(filename):
-        err_msg = "'%s' does not name a file" % filename
-    elif is_executable_file(filename):
-        ftype = IT_Executable
-    elif is_json_file(filename):
-        ftype = IT_JSON
-    else:
-        err_msg = "'%s' does not name a valid benchmark executable or JSON file" % filename
-    return ftype, err_msg
-
-
-def check_input_file(filename):
-    """
-    Classify the file named by 'filename' and return the classification.
-    If the file is classified as 'IT_Invalid' print an error message and exit
-    the program.
-    """
-    ftype, msg = classify_input_file(filename)
-    if ftype == IT_Invalid:
-        print("Invalid input file: %s" % msg)
-        sys.exit(1)
-    return ftype
-
-
-def find_benchmark_flag(prefix, benchmark_flags):
-    """
-    Search the specified list of flags for a flag matching `<prefix><arg>` and
-    if it is found return the arg it specifies. If specified more than once the
-    last value is returned. If the flag is not found None is returned.
-    """
-    assert prefix.startswith('--') and prefix.endswith('=')
-    result = None
-    for f in benchmark_flags:
-        if f.startswith(prefix):
-            result = f[len(prefix):]
-    return result
-
-
-def remove_benchmark_flags(prefix, benchmark_flags):
-    """
-    Return a new list containing the specified benchmark_flags except those
-    with the specified prefix.
-    """
-    assert prefix.startswith('--') and prefix.endswith('=')
-    return [f for f in benchmark_flags if not f.startswith(prefix)]
-
-
-def load_benchmark_results(fname):
-    """
-    Read benchmark output from a file and return the JSON object.
-    REQUIRES: 'fname' names a file containing JSON benchmark output.
-    """
-    with open(fname, 'r') as f:
-        return json.load(f)
-
-
-def sort_benchmark_results(result):
-    benchmarks = result['benchmarks']
-
-    # From inner key to the outer key!
-    benchmarks = sorted(
-        benchmarks, key=lambda benchmark: benchmark['repetition_index'] if 'repetition_index' in benchmark else -1)
-    benchmarks = sorted(
-        benchmarks, key=lambda benchmark: 1 if 'run_type' in benchmark and benchmark['run_type'] == "aggregate" else 0)
-    benchmarks = sorted(
-        benchmarks, key=lambda benchmark: benchmark['per_family_instance_index'] if 'per_family_instance_index' in benchmark else -1)
-    benchmarks = sorted(
-        benchmarks, key=lambda benchmark: benchmark['family_index'] if 'family_index' in benchmark else -1)
-
-    result['benchmarks'] = benchmarks
-    return result
-
-
-def run_benchmark(exe_name, benchmark_flags):
-    """
-    Run a benchmark specified by 'exe_name' with the specified
-    'benchmark_flags'. The benchmark is run directly as a subprocess to preserve
-    real time console output.
-    RETURNS: A JSON object representing the benchmark output
-    """
-    output_name = find_benchmark_flag('--benchmark_out=',
-                                      benchmark_flags)
-    is_temp_output = False
-    if output_name is None:
-        is_temp_output = True
-        thandle, output_name = tempfile.mkstemp()
-        os.close(thandle)
-        benchmark_flags = list(benchmark_flags) + \
-            ['--benchmark_out=%s' % output_name]
-
-    cmd = [exe_name] + benchmark_flags
-    print("RUNNING: %s" % ' '.join(cmd))
-    exitCode = subprocess.call(cmd)
-    if exitCode != 0:
-        print('TEST FAILED...')
-        sys.exit(exitCode)
-    json_res = load_benchmark_results(output_name)
-    if is_temp_output:
-        os.unlink(output_name)
-    return json_res
-
-
-def run_or_load_benchmark(filename, benchmark_flags):
-    """
-    Get the results for a specified benchmark. If 'filename' specifies
-    an executable benchmark then the results are generated by running the
-    benchmark. Otherwise 'filename' must name a valid JSON output file,
-    which is loaded and the result returned.
-    """
-    ftype = check_input_file(filename)
-    if ftype == IT_JSON:
-        return load_benchmark_results(filename)
-    if ftype == IT_Executable:
-        return run_benchmark(filename, benchmark_flags)
-    raise ValueError('Unknown file type %s' % ftype)
diff --git a/3rdparty/benchmark/tools/requirements.txt b/3rdparty/benchmark/tools/requirements.txt
deleted file mode 100644
index 3b3331b5..00000000
--- a/3rdparty/benchmark/tools/requirements.txt
+++ /dev/null
@@ -1 +0,0 @@
-scipy>=1.5.0
\ No newline at end of file
diff --git a/3rdparty/benchmark/tools/strip_asm.py b/3rdparty/benchmark/tools/strip_asm.py
deleted file mode 100644
index 9030550b..00000000
--- a/3rdparty/benchmark/tools/strip_asm.py
+++ /dev/null
@@ -1,151 +0,0 @@
-#!/usr/bin/env python
-
-"""
-strip_asm.py - Cleanup ASM output for the specified file
-"""
-
-from argparse import ArgumentParser
-import sys
-import os
-import re
-
-def find_used_labels(asm):
-    found = set()
-    label_re = re.compile("\s*j[a-z]+\s+\.L([a-zA-Z0-9][a-zA-Z0-9_]*)")
-    for l in asm.splitlines():
-        m = label_re.match(l)
-        if m:
-            found.add('.L%s' % m.group(1))
-    return found
-
-
-def normalize_labels(asm):
-    decls = set()
-    label_decl = re.compile("^[.]{0,1}L([a-zA-Z0-9][a-zA-Z0-9_]*)(?=:)")
-    for l in asm.splitlines():
-        m = label_decl.match(l)
-        if m:
-            decls.add(m.group(0))
-    if len(decls) == 0:
-        return asm
-    needs_dot = next(iter(decls))[0] != '.'
-    if not needs_dot:
-        return asm
-    for ld in decls:
-        asm = re.sub("(^|\s+)" + ld + "(?=:|\s)", '\\1.' + ld, asm)
-    return asm
-
-
-def transform_labels(asm):
-    asm = normalize_labels(asm)
-    used_decls = find_used_labels(asm)
-    new_asm = ''
-    label_decl = re.compile("^\.L([a-zA-Z0-9][a-zA-Z0-9_]*)(?=:)")
-    for l in asm.splitlines():
-        m = label_decl.match(l)
-        if not m or m.group(0) in used_decls:
-            new_asm += l
-            new_asm += '\n'
-    return new_asm
-
-
-def is_identifier(tk):
-    if len(tk) == 0:
-        return False
-    first = tk[0]
-    if not first.isalpha() and first != '_':
-        return False
-    for i in range(1, len(tk)):
-        c = tk[i]
-        if not c.isalnum() and c != '_':
-            return False
-    return True
-
-def process_identifiers(l):
-    """
-    process_identifiers - process all identifiers and modify them to have
-    consistent names across all platforms; specifically across ELF and MachO.
-    For example, MachO inserts an additional understore at the beginning of
-    names. This function removes that.
-    """
-    parts = re.split(r'([a-zA-Z0-9_]+)', l)
-    new_line = ''
-    for tk in parts:
-        if is_identifier(tk):
-            if tk.startswith('__Z'):
-                tk = tk[1:]
-            elif tk.startswith('_') and len(tk) > 1 and \
-                    tk[1].isalpha() and tk[1] != 'Z':
-                tk = tk[1:]
-        new_line += tk
-    return new_line
-
-
-def process_asm(asm):
-    """
-    Strip the ASM of unwanted directives and lines
-    """
-    new_contents = ''
-    asm = transform_labels(asm)
-
-    # TODO: Add more things we want to remove
-    discard_regexes = [
-        re.compile("\s+\..*$"), # directive
-        re.compile("\s*#(NO_APP|APP)$"), #inline ASM
-        re.compile("\s*#.*$"), # comment line
-        re.compile("\s*\.globa?l\s*([.a-zA-Z_][a-zA-Z0-9$_.]*)"), #global directive
-        re.compile("\s*\.(string|asciz|ascii|[1248]?byte|short|word|long|quad|value|zero)"),
-    ]
-    keep_regexes = [
-
-    ]
-    fn_label_def = re.compile("^[a-zA-Z_][a-zA-Z0-9_.]*:")
-    for l in asm.splitlines():
-        # Remove Mach-O attribute
-        l = l.replace('@GOTPCREL', '')
-        add_line = True
-        for reg in discard_regexes:
-            if reg.match(l) is not None:
-                add_line = False
-                break
-        for reg in keep_regexes:
-            if reg.match(l) is not None:
-                add_line = True
-                break
-        if add_line:
-            if fn_label_def.match(l) and len(new_contents) != 0:
-                new_contents += '\n'
-            l = process_identifiers(l)
-            new_contents += l
-            new_contents += '\n'
-    return new_contents
-
-def main():
-    parser = ArgumentParser(
-        description='generate a stripped assembly file')
-    parser.add_argument(
-        'input', metavar='input', type=str, nargs=1,
-        help='An input assembly file')
-    parser.add_argument(
-        'out', metavar='output', type=str, nargs=1,
-        help='The output file')
-    args, unknown_args = parser.parse_known_args()
-    input = args.input[0]
-    output = args.out[0]
-    if not os.path.isfile(input):
-        print(("ERROR: input file '%s' does not exist") % input)
-        sys.exit(1)
-    contents = None
-    with open(input, 'r') as f:
-        contents = f.read()
-    new_contents = process_asm(contents)
-    with open(output, 'w') as f:
-        f.write(new_contents)
-
-
-if __name__ == '__main__':
-    main()
-
-# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
-# kate: tab-width: 4; replace-tabs on; indent-width 4; tab-indents: off;
-# kate: indent-mode python; remove-trailing-spaces modified;
diff --git a/3rdparty/capo/make.hpp b/3rdparty/capo/make.hpp
deleted file mode 100755
index 908849ce..00000000
--- a/3rdparty/capo/make.hpp
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-#include <type_traits>  // std::decay
-#include <utility>      // std::forward
-
-namespace capo
-{
-    template <template <typename...> class Ret, typename... T>
-    using return_t = Ret<typename std::decay<T>::type...>;
-
-    template <template <typename...> class Ret, typename... T>
-    inline return_t<Ret, T...> make(T&&... args)
-    {
-        return return_t<Ret, T...>(std::forward<T>(args)...);
-    }
-}
\ No newline at end of file
diff --git a/3rdparty/capo/noncopyable.hpp b/3rdparty/capo/noncopyable.hpp
deleted file mode 100755
index cb70a114..00000000
--- a/3rdparty/capo/noncopyable.hpp
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-namespace capo {
-
-////////////////////////////////////////////////////////////////
-
-class noncopyable
-{
-protected:
-    noncopyable(void) = default;
-    ~noncopyable(void) = default;
-public:
-    noncopyable(const noncopyable&) = delete;
-    noncopyable& operator=(const noncopyable&) = delete;
-};
-
-////////////////////////////////////////////////////////////////
-
-} // namespace capo
\ No newline at end of file
diff --git a/3rdparty/capo/random.hpp b/3rdparty/capo/random.hpp
deleted file mode 100644
index 78f0e60b..00000000
--- a/3rdparty/capo/random.hpp
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-#include <random>   // std::default_random_engine, std::uniform_int_distribution
-#include <utility>  // std::forward
-
-namespace capo {
-
-////////////////////////////////////////////////////////////////
-/// Simple way of generating random numbers
-////////////////////////////////////////////////////////////////
-
-template <class Engine       = std::default_random_engine, 
-          class Distribution = std::uniform_int_distribution<>>
-class random : public Distribution
-{
-    using base_t = Distribution;
-
-public:
-    using engine_type       = Engine;
-    using distribution_type = Distribution;
-    using result_type       = typename distribution_type::result_type;
-    using param_type        = typename distribution_type::param_type;
-
-private:
-    engine_type engine_;
-
-public:
-    template <typename... T>
-    random(T&&... args)
-        : base_t (std::forward<T>(args)...)
-        , engine_(std::random_device{}())
-    {}
-
-    result_type operator()(void)
-    {
-        return base_t::operator()(engine_);
-    }
-
-    result_type operator()(const param_type& parm)
-    {
-        return base_t::operator()(engine_, parm);
-    }
-};
-
-} // namespace capo
diff --git a/3rdparty/capo/scope_guard.hpp b/3rdparty/capo/scope_guard.hpp
deleted file mode 100755
index 306b6891..00000000
--- a/3rdparty/capo/scope_guard.hpp
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-#include "capo/noncopyable.hpp"
-#include "capo/unused.hpp"
-#include "capo/make.hpp"
-
-#include <utility>      // std::forward, std::move
-#include <algorithm>    // std::swap
-#include <functional>   // std::function
-
-namespace capo {
-
-////////////////////////////////////////////////////////////////
-/// Execute guard function when the enclosing scope exits
-////////////////////////////////////////////////////////////////
-
-template <typename F = std::function<void()>>
-class scope_guard : capo::noncopyable
-{
-    F destructor_;
-    mutable bool dismiss_;
-
-public:
-    template <typename F_>
-    scope_guard(F_&& destructor)
-        : destructor_(std::forward<F_>(destructor))
-        , dismiss_(false)
-    {}
-
-    scope_guard(scope_guard&& rhs)
-        : destructor_(std::move(rhs.destructor_))
-        , dismiss_(true) // dismiss rhs
-    {
-        std::swap(dismiss_, rhs.dismiss_);
-    }
-
-    ~scope_guard(void)
-    {
-        try { do_exit(); }
-        /*
-            In the realm of exceptions, it is fundamental that you can do nothing
-            if your "undo/recover" action fails.
-        */
-        catch(...) { /* Do nothing */ }
-    }
-
-    void dismiss(void) const noexcept
-    {
-        dismiss_ = true;
-    }
-
-    void do_exit(void)
-    {
-        if (!dismiss_)
-        {
-            dismiss_ = true;
-            destructor_();
-        }
-    }
-
-    void swap(scope_guard& rhs)
-    {
-        std::swap(destructor_, rhs.destructor_);
-        std::swap(dismiss_,    rhs.dismiss_);
-    }
-};
-
-namespace detail_scope_guard {
-
-struct helper
-{
-    template <typename F>
-    auto operator=(F&& destructor) -> decltype(capo::make<scope_guard>(std::forward<F>(destructor)))
-    {
-        return capo::make<scope_guard>(std::forward<F>(destructor));
-    }
-};
-
-} // namespace detail_scope_guard
-
-#define CAPO_SCOPE_GUARD_V_(L)  CAPO_UNUSED_ scope_guard_##L##__
-#define CAPO_SCOPE_GUARD_L_(L)  auto CAPO_SCOPE_GUARD_V_(L) = capo::detail_scope_guard::helper{}
-
-/*
-    Do things like this:
-    -->
-    CAPO_SCOPE_GUARD_ = [ptr]
-    {
-        if (ptr) free(ptr);
-    };
-*/
-
-#define CAPO_SCOPE_GUARD_ CAPO_SCOPE_GUARD_L_(__LINE__)
-
-////////////////////////////////////////////////////////////////
-
-} // namespace capo
\ No newline at end of file
diff --git a/3rdparty/capo/spin_lock.hpp b/3rdparty/capo/spin_lock.hpp
deleted file mode 100644
index 8ca2635e..00000000
--- a/3rdparty/capo/spin_lock.hpp
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-#include <atomic>       // std::atomic_flag, std::atomic_signal_fence
-#include <thread>       // std::this_thread
-#include <chrono>       // std::chrono::milliseconds
-#if defined(_MSC_VER)
-#include <windows.h>    // YieldProcessor
-#endif/*_MSC_VER*/
-
-namespace capo {
-namespace detail_spin_lock {
-
-////////////////////////////////////////////////////////////////
-/// Gives hint to processor that improves performance of spin-wait loops.
-////////////////////////////////////////////////////////////////
-
-#if defined(_MSC_VER)
-/*
-    See: http://msdn.microsoft.com/en-us/library/windows/desktop/ms687419(v=vs.85).aspx
-    Not for intel c++ compiler, so ignore http://software.intel.com/en-us/forums/topic/296168
-*/
-#   define CAPO_SPIN_LOCK_PAUSE_() YieldProcessor()
-#elif defined(__GNUC__)
-#if defined(__i386__) || defined(__x86_64__)
-/*
-    See: Intel(R) 64 and IA-32 Architectures Software Developer's Manual V2
-         PAUSE-Spin Loop Hint, 4-57
-         http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.html?wapkw=instruction+set+reference
-*/
-#   define CAPO_SPIN_LOCK_PAUSE_() __asm__ __volatile__("pause")
-#elif defined(__ia64__) || defined(__ia64)
-/*
-    See: Intel(R) Itanium(R) Architecture Developer's Manual, Vol.3
-         hint - Performance Hint, 3:145
-         http://www.intel.com/content/www/us/en/processors/itanium/itanium-architecture-vol-3-manual.html
-*/
-#   define CAPO_SPIN_LOCK_PAUSE_() __asm__ __volatile__ ("hint @pause")
-#elif defined(__arm__)
-/*
-    See: ARM Architecture Reference Manuals (YIELD)
-         http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html
-*/
-#   define CAPO_SPIN_LOCK_PAUSE_() __asm__ __volatile__ ("yield")
-#endif
-#endif/*compilers*/
-
-#if !defined(CAPO_SPIN_LOCK_PAUSE_)
-/*
-    Just use a compiler fence, prevent compiler from optimizing loop
-*/
-#   define CAPO_SPIN_LOCK_PAUSE_() std::atomic_signal_fence(std::memory_order_seq_cst)
-#endif/*!defined(CAPO_SPIN_LOCK_PAUSE_)*/
-
-////////////////////////////////////////////////////////////////
-/// Yield to other threads
-////////////////////////////////////////////////////////////////
-
-inline void yield(unsigned k)
-{
-    if (k < 4)  { /* Do nothing */ }
-    else
-    if (k < 16) { CAPO_SPIN_LOCK_PAUSE_(); }
-    else
-    if (k < 32) { std::this_thread::yield(); }
-    else
-    { std::this_thread::sleep_for(std::chrono::milliseconds(1)); }
-}
-
-} // namespace detail_spin_lock
-
-////////////////////////////////////////////////////////////////
-/// Spinlock
-////////////////////////////////////////////////////////////////
-
-class spin_lock
-{
-    std::atomic_flag lc_ = ATOMIC_FLAG_INIT;
-
-public:
-    bool try_lock(void)
-    {
-        return !lc_.test_and_set(std::memory_order_acquire);
-    }
-
-    void lock(void)
-    {
-        for (unsigned k = 0; lc_.test_and_set(std::memory_order_acquire); ++k)
-            detail_spin_lock::yield(k);
-    }
-
-    void unlock(void)
-    {
-        lc_.clear(std::memory_order_release);
-    }
-};
-
-} // namespace capo
diff --git a/3rdparty/capo/stopwatch.hpp b/3rdparty/capo/stopwatch.hpp
deleted file mode 100644
index 1e96dcb4..00000000
--- a/3rdparty/capo/stopwatch.hpp
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-#include <chrono>   // std::chrono
-#include <array>    // std::array
-#include <utility>  // std::pair, std::declval
-#include <cstddef>  // size_t
-
-namespace capo {
-
-////////////////////////////////////////////////////////////////
-/// Stopwatch - can store multiple sets of time
-////////////////////////////////////////////////////////////////
-
-template <size_t CountN = 1, class ClockT = std::chrono::steady_clock>
-class stopwatch : public ClockT
-{
-    using base_t = ClockT;
-
-    static_assert(CountN > 0, "The count must be greater than 0");
-
-public:
-    using rep        = typename ClockT::rep;
-    using period     = typename ClockT::period;
-    using duration   = typename ClockT::duration;
-    using time_point = typename ClockT::time_point;
-
-private:
-    using pair_t = std::pair<time_point/*start*/, time_point/*paused*/>;
-
-    std::array<pair_t, CountN> points_;
-    bool is_stopped_ = true;
-
-public:
-    stopwatch(bool start_watch = false)
-    {
-        if (start_watch) start();
-    }
-
-public:
-    bool is_stopped(void) const
-    {
-        return is_stopped_;
-    }
-
-    template <size_t N = 0>
-    bool is_paused(void) const
-    {
-        return (points_[N].second != points_[N].first);
-    }
-
-    template <size_t N = 0>
-    duration elapsed(void)
-    {
-        if (is_stopped())
-            return duration::zero();
-        else
-        if (is_paused<N>())
-            return (points_[N].second - points_[N].first);
-        else
-            return ClockT::now() - points_[N].first;
-    }
-
-    template <typename ToDur, size_t N = 0>
-    auto elapsed(void) -> decltype(std::declval<ToDur>().count())
-    {
-        return std::chrono::duration_cast<ToDur>(elapsed<N>()).count();
-    }
-
-    template <size_t N = 0>
-    void pause(void)
-    {
-        points_[N].second = ClockT::now();
-    }
-
-    template <size_t N = 0>
-    void restart(void)
-    {
-        points_[N].second = points_[N].first =
-            ClockT::now() - (points_[N].second - points_[N].first);
-    }
-
-    void start(void)
-    {
-        time_point now = ClockT::now();
-        for (auto& pt : points_)
-        {
-            pt.second = pt.first = now - (pt.second - pt.first);
-        }
-        is_stopped_ = false;
-    }
-
-    void stop(void)
-    {
-        for (auto& pt : points_)
-        {
-            pt.second = pt.first;
-        }
-        is_stopped_ = true;
-    }
-};
-
-} // namespace capo
diff --git a/3rdparty/capo/type_name.hpp b/3rdparty/capo/type_name.hpp
deleted file mode 100755
index aee30334..00000000
--- a/3rdparty/capo/type_name.hpp
+++ /dev/null
@@ -1,320 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-#include "capo/scope_guard.hpp"
-
-#include <typeinfo>     // typeid
-#include <sstream>      // std::ostringstream, std::string
-#include <type_traits>  // std::is_array
-
-#if defined(__GNUC__)
-#   include <cxxabi.h>  // abi::__cxa_demangle
-#endif/*__GNUC__*/
-
-namespace capo {
-namespace detail_type_name {
-
-////////////////////////////////////////////////////////////////
-/// Ready for output
-////////////////////////////////////////////////////////////////
-
-// Forward declarations
-template <typename T, bool IsBase = false>
-struct check;
-
-/*
-    Output state management
-*/
-
-class output
-{
-    bool is_compact_ = true;
-
-    template <typename T>
-    bool check_empty(const T&) { return false; }
-    bool check_empty(const char* val)
-    {
-        return (!val) || (val[0] == 0);
-    }
-
-    template <typename T>
-    void out(const T& val)
-    {
-        if (check_empty(val)) return;
-        if (!is_compact_) sr_ += " ";
-        std::ostringstream ss;
-        ss << val;
-        sr_ += ss.str();
-        is_compact_ = false;
-    }
-
-    std::string& sr_;
-
-public:
-    output(std::string& sr) : sr_(sr) {}
-
-    output& operator()(void) { return (*this); }
-
-    template <typename T1, typename... T>
-    output& operator()(const T1& val, const T&... args)
-    {
-        out(val);
-        return operator()(args...);
-    }
-
-    output& compact(void)
-    {
-        is_compact_ = true;
-        return (*this);
-    }
-};
-
-// ()
-
-template <bool>
-struct bracket
-{
-    output& out_;
-
-    bracket(output& out, const char* = nullptr) : out_(out)
-    { out_("(").compact(); }
-
-    ~bracket(void)
-    { out_.compact()(")"); }
-};
-
-template <>
-struct bracket<false>
-{
-    bracket(output& out, const char* str = nullptr)
-    { out(str); }
-};
-
-// [N]
-
-template <size_t N = 0>
-struct bound
-{
-    output& out_;
-
-    bound(output& out) : out_(out) {}
-    ~bound(void)
-    {
-        if (N == 0) out_("[]");
-        else        out_("[").compact()
-                        ( N ).compact()
-                        ("]");
-    }
-};
-
-// (P1, P2, ...)
-
-template <bool, typename... P>
-struct parameter;
-
-template <bool IsStart>
-struct parameter<IsStart>
-{
-    output& out_;
-
-    parameter(output& out) : out_(out) {}
-    ~parameter(void)
-    { bracket<IsStart> { out_ }; }
-};
-
-template <bool IsStart, typename P1, typename... P>
-struct parameter<IsStart, P1, P...>
-{
-    output& out_;
-
-    parameter(output& out) : out_(out) {}
-    ~parameter(void)
-    {
-        [this](bracket<IsStart>&&)
-        {
-            check<P1> { out_ };
-            parameter<false, P...> { out_.compact() };
-        } (bracket<IsStart> { out_, "," });
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Template specializations for checking
-////////////////////////////////////////////////////////////////
-
-/*
-    CV-qualifiers, references, pointers
-*/
-
-template <typename T, bool IsBase>
-struct check
-{
-    output out_;
-    check(const output& out) : out_(out)
-    {
-#   if defined(__GNUC__)
-        const char* typeid_name = typeid(T).name();
-        char* real_name = abi::__cxa_demangle(typeid_name, nullptr, nullptr, nullptr);
-        CAPO_SCOPE_GUARD_ = [real_name]
-        {
-            if (real_name) ::free(real_name);
-        };
-        out_(real_name ? real_name : typeid_name);
-#   else /*__GNUC__*/
-        out_(typeid(T).name());
-#   endif/*__GNUC__*/
-    }
-};
-
-#pragma push_macro("CAPO_CHECK_TYPE__")
-#undef  CAPO_CHECK_TYPE__
-#define CAPO_CHECK_TYPE__(OPT)                                 \
-    template <typename T, bool IsBase>                         \
-    struct check<T OPT, IsBase> : check<T, true>               \
-    {                                                          \
-        using base_t = check<T, true>;                         \
-        using base_t::out_;                                    \
-        check(const output& out) : base_t(out) { out_(#OPT); } \
-    };
-
-CAPO_CHECK_TYPE__(const)
-CAPO_CHECK_TYPE__(volatile)
-CAPO_CHECK_TYPE__(const volatile)
-CAPO_CHECK_TYPE__(&)
-CAPO_CHECK_TYPE__(&&)
-CAPO_CHECK_TYPE__(*)
-
-#pragma pop_macro("CAPO_CHECK_TYPE__")
-
-/*
-    Arrays
-*/
-
-#pragma push_macro("CAPO_CHECK_TYPE_ARRAY__")
-#pragma push_macro("CAPO_CHECK_TYPE_ARRAY_CV__")
-#pragma push_macro("CAPO_CHECK_TYPE_PLACEHOLDER__")
-
-#undef CAPO_CHECK_TYPE_ARRAY__
-#undef CAPO_CHECK_TYPE_ARRAY_CV__
-#undef CAPO_CHECK_TYPE_PLACEHOLDER__
-
-#define CAPO_CHECK_TYPE_ARRAY__(CV_OPT, BOUND_OPT, ...)                                    \
-    template <typename T, bool IsBase __VA_ARGS__>                                         \
-    struct check<T CV_OPT [BOUND_OPT], IsBase> : check<T CV_OPT, !std::is_array<T>::value> \
-    {                                                                                      \
-        using base_t = check<T CV_OPT, !std::is_array<T>::value>;                          \
-        using base_t::out_;                                                                \
-                                                                                           \
-        bound<BOUND_OPT> bound_   = out_;                                                  \
-        bracket<IsBase>  bracket_ = out_;                                                  \
-                                                                                           \
-        check(const output& out) : base_t(out) {}                                          \
-    };
-
-#define CAPO_CHECK_TYPE_ARRAY_CV__(BOUND_OPT, ...)               \
-    CAPO_CHECK_TYPE_ARRAY__(, BOUND_OPT, ,##__VA_ARGS__)         \
-    CAPO_CHECK_TYPE_ARRAY__(const, BOUND_OPT, ,##__VA_ARGS__)    \
-    CAPO_CHECK_TYPE_ARRAY__(volatile, BOUND_OPT, ,##__VA_ARGS__) \
-    CAPO_CHECK_TYPE_ARRAY__(const volatile, BOUND_OPT, ,##__VA_ARGS__)
-
-#define CAPO_CHECK_TYPE_PLACEHOLDER__
-
-CAPO_CHECK_TYPE_ARRAY_CV__(CAPO_CHECK_TYPE_PLACEHOLDER__)
-#if defined(__GNUC__)
-CAPO_CHECK_TYPE_ARRAY_CV__(0)
-#endif/*__GNUC__*/
-CAPO_CHECK_TYPE_ARRAY_CV__(N, size_t N)
-
-#pragma pop_macro("CAPO_CHECK_TYPE_PLACEHOLDER__")
-#pragma pop_macro("CAPO_CHECK_TYPE_ARRAY_CV__")
-#pragma pop_macro("CAPO_CHECK_TYPE_ARRAY__")
-
-/*
-    Functions
-*/
-
-template <typename T, bool IsBase, typename... P>
-struct check<T(P...), IsBase> : check<T, true>
-{
-    using base_t = check<T, true>;
-    using base_t::out_;
-
-    parameter<true, P...> parameter_ = out_;
-    bracket<IsBase>       bracket_   = out_;
-
-    check(const output& out) : base_t(out) {}
-};
-
-/*
-    Pointers to members
-*/
-
-template <typename T, bool IsBase, typename C>
-struct check<T C::*, IsBase> : check<T, true>
-{
-    using base_t = check<T, true>;
-    using base_t::out_;
-
-    check(const output& out) : base_t(out)
-    {
-        check<C> { out_ };
-        out_.compact()("::*");
-    }
-};
-
-/*
-    Pointers to member functions
-*/
-
-#pragma push_macro("CAPO_CHECK_TYPE_MEM_FUNC__")
-#undef  CAPO_CHECK_TYPE_MEM_FUNC__
-#define CAPO_CHECK_TYPE_MEM_FUNC__(...)                           \
-    template <typename T, bool IsBase, typename C, typename... P> \
-    struct check<T(C::*)(P...) __VA_ARGS__, IsBase>               \
-    {                                                             \
-        scope_guard<> at_destruct_cv_;                            \
-        check<T(P...), true> base_;                               \
-        output& out_ = base_.out_;                                \
-                                                                  \
-        check(const output& out)                                  \
-            : at_destruct_cv_([this]{ out_(#__VA_ARGS__); })      \
-            , base_(out)                                          \
-        {                                                         \
-            check<C> { out_ };                                    \
-            out_.compact()("::*");                                \
-        }                                                         \
-    };
-
-CAPO_CHECK_TYPE_MEM_FUNC__()
-CAPO_CHECK_TYPE_MEM_FUNC__(const)
-CAPO_CHECK_TYPE_MEM_FUNC__(volatile)
-CAPO_CHECK_TYPE_MEM_FUNC__(const volatile)
-
-#pragma pop_macro("CAPO_CHECK_TYPE_MEM_FUNC__")
-
-} // namespace detail_type_name
-
-////////////////////////////////////////////////////////////////
-/// Get the name of the given type
-////////////////////////////////////////////////////////////////
-
-/*
-    type_name<const volatile void *>()
-    -->
-    void const volatile *
-*/
-
-template <typename T>
-inline std::string type_name(void)
-{
-    std::string str;
-    detail_type_name::check<T> { str };
-    return str;
-}
-
-} // namespace capo
\ No newline at end of file
diff --git a/3rdparty/capo/unused.hpp b/3rdparty/capo/unused.hpp
deleted file mode 100755
index b79d7ef6..00000000
--- a/3rdparty/capo/unused.hpp
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-////////////////////////////////////////////////////////////////
-
-#ifdef CAPO_UNUSED_
-#   error "CAPO_UNUSED_ has been defined."
-#endif
-
-#if defined(_MSC_VER)
-#   define CAPO_UNUSED_ __pragma(warning(suppress: 4100 4101 4189))
-#elif defined(__GNUC__)
-#   define CAPO_UNUSED_ __attribute__((__unused__))
-#else
-#   define CAPO_UNUSED_
-#endif
-
-////////////////////////////////////////////////////////////////
\ No newline at end of file
diff --git a/3rdparty/gperftools/libtcmalloc_minimal.so.4 b/3rdparty/gperftools/libtcmalloc_minimal.so.4
deleted file mode 100644
index 74cc4602..00000000
--- a/3rdparty/gperftools/libtcmalloc_minimal.so.4
+++ /dev/null
@@ -1 +0,0 @@
-libtcmalloc_minimal.so
\ No newline at end of file
diff --git a/3rdparty/gperftools/libtcmalloc_minimal.so.4.5.3 b/3rdparty/gperftools/libtcmalloc_minimal.so.4.5.3
deleted file mode 100644
index 74cc4602..00000000
--- a/3rdparty/gperftools/libtcmalloc_minimal.so.4.5.3
+++ /dev/null
@@ -1 +0,0 @@
-libtcmalloc_minimal.so
\ No newline at end of file
diff --git a/3rdparty/gperftools/tcmalloc.h b/3rdparty/gperftools/tcmalloc.h
deleted file mode 100644
index 79350817..00000000
--- a/3rdparty/gperftools/tcmalloc.h
+++ /dev/null
@@ -1,163 +0,0 @@
-// -*- Mode: C; c-basic-offset: 2; indent-tabs-mode: nil -*-
-/* Copyright (c) 2003, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * ---
- * Author: Sanjay Ghemawat <opensource@google.com>
- *         .h file by Craig Silverstein <opensource@google.com>
- */
-
-#ifndef TCMALLOC_TCMALLOC_H_
-#define TCMALLOC_TCMALLOC_H_
-
-#include <stddef.h>                     /* for size_t */
-#ifdef __cplusplus
-#include <new>                          /* for std::nothrow_t, std::align_val_t */
-#endif
-
-/* Define the version number so folks can check against it */
-#define TC_VERSION_MAJOR  2
-#define TC_VERSION_MINOR  7
-#define TC_VERSION_PATCH  ""
-#define TC_VERSION_STRING "gperftools 2.7"
-
-/* For struct mallinfo, if it's defined. */
-#if 1
-# include <malloc.h>
-#endif
-
-#ifndef PERFTOOLS_NOTHROW
-
-#if __cplusplus >= 201103L
-#define PERFTOOLS_NOTHROW noexcept
-#elif defined(__cplusplus)
-#define PERFTOOLS_NOTHROW throw()
-#else
-# ifdef __GNUC__
-#  define PERFTOOLS_NOTHROW __attribute__((__nothrow__))
-# else
-#  define PERFTOOLS_NOTHROW
-# endif
-#endif
-
-#endif
-
-#ifndef PERFTOOLS_DLL_DECL
-# ifdef _WIN32
-#   define PERFTOOLS_DLL_DECL  __declspec(dllimport)
-# else
-#   define PERFTOOLS_DLL_DECL
-# endif
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-  /*
-   * Returns a human-readable version string.  If major, minor,
-   * and/or patch are not NULL, they are set to the major version,
-   * minor version, and patch-code (a string, usually "").
-   */
-  PERFTOOLS_DLL_DECL const char* tc_version(int* major, int* minor,
-                                            const char** patch) PERFTOOLS_NOTHROW;
-
-  PERFTOOLS_DLL_DECL void* tc_malloc(size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_malloc_skip_new_handler(size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_free(void* ptr) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_free_sized(void *ptr, size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_realloc(void* ptr, size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_calloc(size_t nmemb, size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_cfree(void* ptr) PERFTOOLS_NOTHROW;
-
-  PERFTOOLS_DLL_DECL void* tc_memalign(size_t __alignment,
-                                       size_t __size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL int tc_posix_memalign(void** ptr,
-                                           size_t align, size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_valloc(size_t __size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_pvalloc(size_t __size) PERFTOOLS_NOTHROW;
-
-  PERFTOOLS_DLL_DECL void tc_malloc_stats(void) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL int tc_mallopt(int cmd, int value) PERFTOOLS_NOTHROW;
-#if 1
-  PERFTOOLS_DLL_DECL struct mallinfo tc_mallinfo(void) PERFTOOLS_NOTHROW;
-#endif
-
-  /*
-   * This is an alias for MallocExtension::instance()->GetAllocatedSize().
-   * It is equivalent to
-   *    OS X: malloc_size()
-   *    glibc: malloc_usable_size()
-   *    Windows: _msize()
-   */
-  PERFTOOLS_DLL_DECL size_t tc_malloc_size(void* ptr) PERFTOOLS_NOTHROW;
-
-#ifdef __cplusplus
-  PERFTOOLS_DLL_DECL int tc_set_new_mode(int flag) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_new(size_t size);
-  PERFTOOLS_DLL_DECL void* tc_new_nothrow(size_t size,
-                                          const std::nothrow_t&) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_delete(void* p) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_delete_sized(void* p, size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_delete_nothrow(void* p,
-                                            const std::nothrow_t&) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_newarray(size_t size);
-  PERFTOOLS_DLL_DECL void* tc_newarray_nothrow(size_t size,
-                                               const std::nothrow_t&) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_deletearray(void* p) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_deletearray_sized(void* p, size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_deletearray_nothrow(void* p,
-                                                 const std::nothrow_t&) PERFTOOLS_NOTHROW;
-
-#if 1 && __cplusplus >= 201703L
-  PERFTOOLS_DLL_DECL void* tc_new_aligned(size_t size, std::align_val_t al);
-  PERFTOOLS_DLL_DECL void* tc_new_aligned_nothrow(size_t size, std::align_val_t al,
-                                          const std::nothrow_t&) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_delete_aligned(void* p, std::align_val_t al) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_delete_sized_aligned(void* p, size_t size, std::align_val_t al) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_delete_aligned_nothrow(void* p, std::align_val_t al,
-                                            const std::nothrow_t&) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_newarray_aligned(size_t size, std::align_val_t al);
-  PERFTOOLS_DLL_DECL void* tc_newarray_aligned_nothrow(size_t size, std::align_val_t al,
-                                               const std::nothrow_t&) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_deletearray_aligned(void* p, std::align_val_t al) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_deletearray_sized_aligned(void* p, size_t size, std::align_val_t al) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_deletearray_aligned_nothrow(void* p, std::align_val_t al,
-                                                 const std::nothrow_t&) PERFTOOLS_NOTHROW;
-#endif
-}
-#endif
-
-/* We're only un-defining for public */
-#if !defined(GPERFTOOLS_CONFIG_H_)
-
-#undef PERFTOOLS_NOTHROW
-
-#endif /* GPERFTOOLS_CONFIG_H_ */
-
-#endif  /* #ifndef TCMALLOC_TCMALLOC_H_ */
diff --git a/3rdparty/gtest/CMakeLists.txt b/3rdparty/gtest/CMakeLists.txt
deleted file mode 100644
index 97af6052..00000000
--- a/3rdparty/gtest/CMakeLists.txt
+++ /dev/null
@@ -1,332 +0,0 @@
-########################################################################
-# Note: CMake support is community-based. The maintainers do not use CMake
-# internally.
-#
-# CMake build script for Google Test.
-#
-# To run the tests for Google Test itself on Linux, use 'make test' or
-# ctest.  You can select which tests to run using 'ctest -R regex'.
-# For more options, run 'ctest --help'.
-
-if (POLICY CMP0077)
-  cmake_policy(SET CMP0077 NEW)
-endif (POLICY CMP0077)
-
-# When other libraries are using a shared version of runtime libraries,
-# Google Test also has to use one.
-option(
-  gtest_force_shared_crt
-  "Use shared (DLL) run-time lib even when Google Test is built as static lib."
-  OFF)
-
-option(gtest_build_tests "Build all of gtest's own tests." OFF)
-
-option(gtest_build_samples "Build gtest's sample programs." OFF)
-
-option(gtest_disable_pthreads "Disable uses of pthreads in gtest." OFF)
-
-option(
-  gtest_hide_internal_symbols
-  "Build gtest with internal symbols hidden in shared libraries."
-  OFF)
-
-# Defines pre_project_set_up_hermetic_build() and set_up_hermetic_build().
-include(cmake/hermetic_build.cmake OPTIONAL)
-
-if (COMMAND pre_project_set_up_hermetic_build)
-  pre_project_set_up_hermetic_build()
-endif()
-
-########################################################################
-#
-# Project-wide settings
-
-# Name of the project.
-#
-# CMake files in this project can refer to the root source directory
-# as ${gtest_SOURCE_DIR} and to the root binary directory as
-# ${gtest_BINARY_DIR}.
-# Language "C" is required for find_package(Threads).
-
-# Project version:
-
-if (CMAKE_VERSION VERSION_LESS 3.0)
-  project(gtest CXX C)
-  set(PROJECT_VERSION ${GOOGLETEST_VERSION})
-else()
-  cmake_policy(SET CMP0048 NEW)
-  project(gtest VERSION ${GOOGLETEST_VERSION} LANGUAGES CXX C)
-endif()
-cmake_minimum_required(VERSION 2.6.4)
-
-if (POLICY CMP0063) # Visibility
-  cmake_policy(SET CMP0063 NEW)
-endif (POLICY CMP0063)
-
-if (COMMAND set_up_hermetic_build)
-  set_up_hermetic_build()
-endif()
-
-# These commands only run if this is the main project
-if(CMAKE_PROJECT_NAME STREQUAL "gtest" OR CMAKE_PROJECT_NAME STREQUAL "googletest-distribution")
-
-  # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to
-  # make it prominent in the GUI.
-  option(BUILD_SHARED_LIBS "Build shared libraries (DLLs)." OFF)
-
-else()
-
-  mark_as_advanced(
-    gtest_force_shared_crt
-    gtest_build_tests
-    gtest_build_samples
-    gtest_disable_pthreads
-    gtest_hide_internal_symbols)
-
-endif()
-
-
-if (gtest_hide_internal_symbols)
-  set(CMAKE_CXX_VISIBILITY_PRESET hidden)
-  set(CMAKE_VISIBILITY_INLINES_HIDDEN 1)
-endif()
-
-# Define helper functions and macros used by Google Test.
-include(cmake/internal_utils.cmake)
-
-config_compiler_and_linker()  # Defined in internal_utils.cmake.
-
-# Create the CMake package file descriptors.
-if (INSTALL_GTEST)
-  include(CMakePackageConfigHelpers)
-  set(cmake_package_name GTest)
-  set(targets_export_name ${cmake_package_name}Targets CACHE INTERNAL "")
-  set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated" CACHE INTERNAL "")
-  set(cmake_files_install_dir "${CMAKE_INSTALL_LIBDIR}/cmake/${cmake_package_name}")
-  set(version_file "${generated_dir}/${cmake_package_name}ConfigVersion.cmake")
-  write_basic_package_version_file(${version_file} VERSION ${GOOGLETEST_VERSION} COMPATIBILITY AnyNewerVersion)
-  install(EXPORT ${targets_export_name}
-    NAMESPACE ${cmake_package_name}::
-    DESTINATION ${cmake_files_install_dir})
-  set(config_file "${generated_dir}/${cmake_package_name}Config.cmake")
-  configure_package_config_file("${gtest_SOURCE_DIR}/cmake/Config.cmake.in"
-    "${config_file}" INSTALL_DESTINATION ${cmake_files_install_dir})
-  install(FILES ${version_file} ${config_file}
-    DESTINATION ${cmake_files_install_dir})
-endif()
-
-# Where Google Test's .h files can be found.
-set(gtest_build_include_dirs
-  "${gtest_SOURCE_DIR}/include"
-  "${gtest_SOURCE_DIR}")
-include_directories(${gtest_build_include_dirs})
-
-########################################################################
-#
-# Defines the gtest & gtest_main libraries.  User tests should link
-# with one of them.
-
-# Google Test libraries.  We build them using more strict warnings than what
-# are used for other targets, to ensure that gtest can be compiled by a user
-# aggressive about warnings.
-cxx_library(gtest "${cxx_strict}" src/gtest-all.cc)
-cxx_library(gtest_main "${cxx_strict}" src/gtest_main.cc)
-# If the CMake version supports it, attach header directory information
-# to the targets for when we are part of a parent build (ie being pulled
-# in via add_subdirectory() rather than being a standalone build).
-if (DEFINED CMAKE_VERSION AND NOT "${CMAKE_VERSION}" VERSION_LESS "2.8.11")
-  target_include_directories(gtest SYSTEM INTERFACE
-    "$<BUILD_INTERFACE:${gtest_build_include_dirs}>"
-    "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}>")
-  target_include_directories(gtest_main SYSTEM INTERFACE
-    "$<BUILD_INTERFACE:${gtest_build_include_dirs}>"
-    "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}>")
-endif()
-target_link_libraries(gtest_main PUBLIC gtest)
-
-########################################################################
-#
-# Install rules
-install_project(gtest gtest_main)
-
-########################################################################
-#
-# Samples on how to link user tests with gtest or gtest_main.
-#
-# They are not built by default.  To build them, set the
-# gtest_build_samples option to ON.  You can do it by running ccmake
-# or specifying the -Dgtest_build_samples=ON flag when running cmake.
-
-if (gtest_build_samples)
-  cxx_executable(sample1_unittest samples gtest_main samples/sample1.cc)
-  cxx_executable(sample2_unittest samples gtest_main samples/sample2.cc)
-  cxx_executable(sample3_unittest samples gtest_main)
-  cxx_executable(sample4_unittest samples gtest_main samples/sample4.cc)
-  cxx_executable(sample5_unittest samples gtest_main samples/sample1.cc)
-  cxx_executable(sample6_unittest samples gtest_main)
-  cxx_executable(sample7_unittest samples gtest_main)
-  cxx_executable(sample8_unittest samples gtest_main)
-  cxx_executable(sample9_unittest samples gtest)
-  cxx_executable(sample10_unittest samples gtest)
-endif()
-
-########################################################################
-#
-# Google Test's own tests.
-#
-# You can skip this section if you aren't interested in testing
-# Google Test itself.
-#
-# The tests are not built by default.  To build them, set the
-# gtest_build_tests option to ON.  You can do it by running ccmake
-# or specifying the -Dgtest_build_tests=ON flag when running cmake.
-
-if (gtest_build_tests)
-  # This must be set in the root directory for the tests to be run by
-  # 'make test' or ctest.
-  enable_testing()
-
-  if (WIN32)
-    file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/RunTest.ps1"
-         CONTENT
-"$project_bin = \"${CMAKE_BINARY_DIR}/bin/$<CONFIG>\"
-$env:Path = \"$project_bin;$env:Path\"
-& $args")
-  elseif (MINGW OR CYGWIN)
-    file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/RunTest.ps1"
-         CONTENT
-"$project_bin = (cygpath --windows ${CMAKE_BINARY_DIR}/bin)
-$env:Path = \"$project_bin;$env:Path\"
-& $args")
-  endif()
-
-  ############################################################
-  # C++ tests built with standard compiler flags.
-
-  cxx_test(googletest-death-test-test gtest_main)
-  cxx_test(gtest_environment_test gtest)
-  cxx_test(googletest-filepath-test gtest_main)
-  cxx_test(googletest-listener-test gtest_main)
-  cxx_test(gtest_main_unittest gtest_main)
-  cxx_test(googletest-message-test gtest_main)
-  cxx_test(gtest_no_test_unittest gtest)
-  cxx_test(googletest-options-test gtest_main)
-  cxx_test(googletest-param-test-test gtest
-    test/googletest-param-test2-test.cc)
-  cxx_test(googletest-port-test gtest_main)
-  cxx_test(gtest_pred_impl_unittest gtest_main)
-  cxx_test(gtest_premature_exit_test gtest
-    test/gtest_premature_exit_test.cc)
-  cxx_test(googletest-printers-test gtest_main)
-  cxx_test(gtest_prod_test gtest_main
-    test/production.cc)
-  cxx_test(gtest_repeat_test gtest)
-  cxx_test(gtest_sole_header_test gtest_main)
-  cxx_test(gtest_stress_test gtest)
-  cxx_test(googletest-test-part-test gtest_main)
-  cxx_test(gtest_throw_on_failure_ex_test gtest)
-  cxx_test(gtest-typed-test_test gtest_main
-    test/gtest-typed-test2_test.cc)
-  cxx_test(gtest_unittest gtest_main)
-  cxx_test(gtest-unittest-api_test gtest)
-  cxx_test(gtest_skip_in_environment_setup_test gtest_main)
-  cxx_test(gtest_skip_test gtest_main)
-
-  ############################################################
-  # C++ tests built with non-standard compiler flags.
-
-  # MSVC 7.1 does not support STL with exceptions disabled.
-  if (NOT MSVC OR MSVC_VERSION GREATER 1310)
-    cxx_library(gtest_no_exception "${cxx_no_exception}"
-      src/gtest-all.cc)
-    cxx_library(gtest_main_no_exception "${cxx_no_exception}"
-      src/gtest-all.cc src/gtest_main.cc)
-  endif()
-  cxx_library(gtest_main_no_rtti "${cxx_no_rtti}"
-    src/gtest-all.cc src/gtest_main.cc)
-
-  cxx_test_with_flags(gtest-death-test_ex_nocatch_test
-    "${cxx_exception} -DGTEST_ENABLE_CATCH_EXCEPTIONS_=0"
-    gtest test/googletest-death-test_ex_test.cc)
-  cxx_test_with_flags(gtest-death-test_ex_catch_test
-    "${cxx_exception} -DGTEST_ENABLE_CATCH_EXCEPTIONS_=1"
-    gtest test/googletest-death-test_ex_test.cc)
-
-  cxx_test_with_flags(gtest_no_rtti_unittest "${cxx_no_rtti}"
-    gtest_main_no_rtti test/gtest_unittest.cc)
-
-  cxx_shared_library(gtest_dll "${cxx_default}"
-    src/gtest-all.cc src/gtest_main.cc)
-
-  cxx_executable_with_flags(gtest_dll_test_ "${cxx_default}"
-    gtest_dll test/gtest_all_test.cc)
-  set_target_properties(gtest_dll_test_
-                        PROPERTIES
-                        COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
-
-  ############################################################
-  # Python tests.
-
-  cxx_executable(googletest-break-on-failure-unittest_ test gtest)
-  py_test(googletest-break-on-failure-unittest)
-
-  py_test(gtest_skip_environment_check_output_test)
-
-  # Visual Studio .NET 2003 does not support STL with exceptions disabled.
-  if (NOT MSVC OR MSVC_VERSION GREATER 1310)  # 1310 is Visual Studio .NET 2003
-    cxx_executable_with_flags(
-      googletest-catch-exceptions-no-ex-test_
-      "${cxx_no_exception}"
-      gtest_main_no_exception
-      test/googletest-catch-exceptions-test_.cc)
-  endif()
-
-  cxx_executable_with_flags(
-    googletest-catch-exceptions-ex-test_
-    "${cxx_exception}"
-    gtest_main
-    test/googletest-catch-exceptions-test_.cc)
-  py_test(googletest-catch-exceptions-test)
-
-  cxx_executable(googletest-color-test_ test gtest)
-  py_test(googletest-color-test)
-
-  cxx_executable(googletest-env-var-test_ test gtest)
-  py_test(googletest-env-var-test)
-
-  cxx_executable(googletest-filter-unittest_ test gtest)
-  py_test(googletest-filter-unittest)
-
-  cxx_executable(gtest_help_test_ test gtest_main)
-  py_test(gtest_help_test)
-
-  cxx_executable(googletest-list-tests-unittest_ test gtest)
-  py_test(googletest-list-tests-unittest)
-
-  cxx_executable(googletest-output-test_ test gtest)
-  py_test(googletest-output-test --no_stacktrace_support)
-
-  cxx_executable(googletest-shuffle-test_ test gtest)
-  py_test(googletest-shuffle-test)
-
-  # MSVC 7.1 does not support STL with exceptions disabled.
-  if (NOT MSVC OR MSVC_VERSION GREATER 1310)
-    cxx_executable(googletest-throw-on-failure-test_ test gtest_no_exception)
-    set_target_properties(googletest-throw-on-failure-test_
-      PROPERTIES
-      COMPILE_FLAGS "${cxx_no_exception}")
-    py_test(googletest-throw-on-failure-test)
-  endif()
-
-  cxx_executable(googletest-uninitialized-test_ test gtest)
-  py_test(googletest-uninitialized-test)
-
-  cxx_executable(gtest_xml_outfile1_test_ test gtest_main)
-  cxx_executable(gtest_xml_outfile2_test_ test gtest_main)
-  py_test(gtest_xml_outfiles_test)
-  py_test(googletest-json-outfiles-test)
-
-  cxx_executable(gtest_xml_output_unittest_ test gtest)
-  py_test(gtest_xml_output_unittest --no_stacktrace_support)
-  py_test(googletest-json-output-unittest --no_stacktrace_support)
-endif()
diff --git a/3rdparty/gtest/CONTRIBUTORS b/3rdparty/gtest/CONTRIBUTORS
deleted file mode 100644
index feae2fc0..00000000
--- a/3rdparty/gtest/CONTRIBUTORS
+++ /dev/null
@@ -1,37 +0,0 @@
-# This file contains a list of people who've made non-trivial
-# contribution to the Google C++ Testing Framework project.  People
-# who commit code to the project are encouraged to add their names
-# here.  Please keep the list sorted by first names.
-
-Ajay Joshi <jaj@google.com>
-Balázs Dán <balazs.dan@gmail.com>
-Bharat Mediratta <bharat@menalto.com>
-Chandler Carruth <chandlerc@google.com>
-Chris Prince <cprince@google.com>
-Chris Taylor <taylorc@google.com>
-Dan Egnor <egnor@google.com>
-Eric Roman <eroman@chromium.org>
-Hady Zalek <hady.zalek@gmail.com>
-Jeffrey Yasskin <jyasskin@google.com>
-Jói Sigurðsson <joi@google.com>
-Keir Mierle <mierle@gmail.com>
-Keith Ray <keith.ray@gmail.com>
-Kenton Varda <kenton@google.com>
-Manuel Klimek <klimek@google.com>
-Markus Heule <markus.heule@gmail.com>
-Mika Raento <mikie@iki.fi>
-Miklós Fazekas <mfazekas@szemafor.com>
-Pasi Valminen <pasi.valminen@gmail.com>
-Patrick Hanna <phanna@google.com>
-Patrick Riley <pfr@google.com>
-Peter Kaminski <piotrk@google.com>
-Preston Jackson <preston.a.jackson@gmail.com>
-Rainer Klaffenboeck <rainer.klaffenboeck@dynatrace.com>
-Russ Cox <rsc@google.com>
-Russ Rufer <russ@pentad.com>
-Sean Mcafee <eefacm@gmail.com>
-Sigurður Ásgeirsson <siggi@google.com>
-Tracy Bialik <tracy@pentad.com>
-Vadim Berman <vadimb@google.com>
-Vlad Losev <vladl@google.com>
-Zhanyong Wan <wan@google.com>
diff --git a/3rdparty/gtest/LICENSE b/3rdparty/gtest/LICENSE
deleted file mode 100644
index 1941a11f..00000000
--- a/3rdparty/gtest/LICENSE
+++ /dev/null
@@ -1,28 +0,0 @@
-Copyright 2008, Google Inc.
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-    * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/3rdparty/gtest/README.md b/3rdparty/gtest/README.md
deleted file mode 100644
index 766ddc1e..00000000
--- a/3rdparty/gtest/README.md
+++ /dev/null
@@ -1,244 +0,0 @@
-### Generic Build Instructions
-
-#### Setup
-
-To build Google Test and your tests that use it, you need to tell your build
-system where to find its headers and source files. The exact way to do it
-depends on which build system you use, and is usually straightforward.
-
-### Build with CMake
-
-Google Test comes with a CMake build script (
-[CMakeLists.txt](https://github.com/google/googletest/blob/master/CMakeLists.txt))
-that can be used on a wide range of platforms ("C" stands for cross-platform.).
-If you don't have CMake installed already, you can download it for free from
-<http://www.cmake.org/>.
-
-CMake works by generating native makefiles or build projects that can be used in
-the compiler environment of your choice. You can either build Google Test as a
-standalone project or it can be incorporated into an existing CMake build for
-another project.
-
-#### Standalone CMake Project
-
-When building Google Test as a standalone project, the typical workflow starts
-with:
-
-    mkdir mybuild       # Create a directory to hold the build output.
-    cd mybuild
-    cmake ${GTEST_DIR}  # Generate native build scripts.
-
-If you want to build Google Test's samples, you should replace the last command
-with
-
-    cmake -Dgtest_build_samples=ON ${GTEST_DIR}
-
-If you are on a \*nix system, you should now see a Makefile in the current
-directory. Just type 'make' to build gtest.
-
-If you use Windows and have Visual Studio installed, a `gtest.sln` file and
-several `.vcproj` files will be created. You can then build them using Visual
-Studio.
-
-On Mac OS X with Xcode installed, a `.xcodeproj` file will be generated.
-
-#### Incorporating Into An Existing CMake Project
-
-If you want to use gtest in a project which already uses CMake, then a more
-robust and flexible approach is to build gtest as part of that project directly.
-This is done by making the GoogleTest source code available to the main build
-and adding it using CMake's `add_subdirectory()` command. This has the
-significant advantage that the same compiler and linker settings are used
-between gtest and the rest of your project, so issues associated with using
-incompatible libraries (eg debug/release), etc. are avoided. This is
-particularly useful on Windows. Making GoogleTest's source code available to the
-main build can be done a few different ways:
-
-*   Download the GoogleTest source code manually and place it at a known
-    location. This is the least flexible approach and can make it more difficult
-    to use with continuous integration systems, etc.
-*   Embed the GoogleTest source code as a direct copy in the main project's
-    source tree. This is often the simplest approach, but is also the hardest to
-    keep up to date. Some organizations may not permit this method.
-*   Add GoogleTest as a git submodule or equivalent. This may not always be
-    possible or appropriate. Git submodules, for example, have their own set of
-    advantages and drawbacks.
-*   Use CMake to download GoogleTest as part of the build's configure step. This
-    is just a little more complex, but doesn't have the limitations of the other
-    methods.
-
-The last of the above methods is implemented with a small piece of CMake code in
-a separate file (e.g. `CMakeLists.txt.in`) which is copied to the build area and
-then invoked as a sub-build _during the CMake stage_. That directory is then
-pulled into the main build with `add_subdirectory()`. For example:
-
-New file `CMakeLists.txt.in`:
-
-```cmake
-cmake_minimum_required(VERSION 2.8.2)
-
-project(googletest-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(googletest
-  GIT_REPOSITORY    https://github.com/google/googletest.git
-  GIT_TAG           master
-  SOURCE_DIR        "${CMAKE_CURRENT_BINARY_DIR}/googletest-src"
-  BINARY_DIR        "${CMAKE_CURRENT_BINARY_DIR}/googletest-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)
-```
-
-Existing build's `CMakeLists.txt`:
-
-```cmake
-# Download and unpack googletest at configure time
-configure_file(CMakeLists.txt.in googletest-download/CMakeLists.txt)
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-  RESULT_VARIABLE result
-  WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download )
-if(result)
-  message(FATAL_ERROR "CMake step for googletest failed: ${result}")
-endif()
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-  RESULT_VARIABLE result
-  WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download )
-if(result)
-  message(FATAL_ERROR "Build step for googletest failed: ${result}")
-endif()
-
-# Prevent overriding the parent project's compiler/linker
-# settings on Windows
-set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-
-# Add googletest directly to our build. This defines
-# the gtest and gtest_main targets.
-add_subdirectory(${CMAKE_CURRENT_BINARY_DIR}/googletest-src
-                 ${CMAKE_CURRENT_BINARY_DIR}/googletest-build
-                 EXCLUDE_FROM_ALL)
-
-# The gtest/gtest_main targets carry header search path
-# dependencies automatically when using CMake 2.8.11 or
-# later. Otherwise we have to add them here ourselves.
-if (CMAKE_VERSION VERSION_LESS 2.8.11)
-  include_directories("${gtest_SOURCE_DIR}/include")
-endif()
-
-# Now simply link against gtest or gtest_main as needed. Eg
-add_executable(example example.cpp)
-target_link_libraries(example gtest_main)
-add_test(NAME example_test COMMAND example)
-```
-
-Note that this approach requires CMake 2.8.2 or later due to its use of the
-`ExternalProject_Add()` command. The above technique is discussed in more detail
-in [this separate article](http://crascit.com/2015/07/25/cmake-gtest/) which
-also contains a link to a fully generalized implementation of the technique.
-
-##### Visual Studio Dynamic vs Static Runtimes
-
-By default, new Visual Studio projects link the C runtimes dynamically but
-Google Test links them statically. This will generate an error that looks
-something like the following: gtest.lib(gtest-all.obj) : error LNK2038: mismatch
-detected for 'RuntimeLibrary': value 'MTd_StaticDebug' doesn't match value
-'MDd_DynamicDebug' in main.obj
-
-Google Test already has a CMake option for this: `gtest_force_shared_crt`
-
-Enabling this option will make gtest link the runtimes dynamically too, and
-match the project in which it is included.
-
-#### C++ Standard Version
-
-An environment that supports C++11 is required in order to successfully build
-Google Test. One way to ensure this is to specify the standard in the top-level
-project, for example by using the `set(CMAKE_CXX_STANDARD 11)` command. If this
-is not feasible, for example in a C project using Google Test for validation,
-then it can be specified by adding it to the options for cmake via the
-`DCMAKE_CXX_FLAGS` option.
-
-### Tweaking Google Test
-
-Google Test can be used in diverse environments. The default configuration may
-not work (or may not work well) out of the box in some environments. However,
-you can easily tweak Google Test by defining control macros on the compiler
-command line. Generally, these macros are named like `GTEST_XYZ` and you define
-them to either 1 or 0 to enable or disable a certain feature.
-
-We list the most frequently used macros below. For a complete list, see file
-[include/gtest/internal/gtest-port.h](https://github.com/google/googletest/blob/master/googletest/include/gtest/internal/gtest-port.h).
-
-### Multi-threaded Tests
-
-Google Test is thread-safe where the pthread library is available. After
-`#include "gtest/gtest.h"`, you can check the
-`GTEST_IS_THREADSAFE` macro to see whether this is the case (yes if the macro is
-`#defined` to 1, no if it's undefined.).
-
-If Google Test doesn't correctly detect whether pthread is available in your
-environment, you can force it with
-
-    -DGTEST_HAS_PTHREAD=1
-
-or
-
-    -DGTEST_HAS_PTHREAD=0
-
-When Google Test uses pthread, you may need to add flags to your compiler and/or
-linker to select the pthread library, or you'll get link errors. If you use the
-CMake script or the deprecated Autotools script, this is taken care of for you.
-If you use your own build script, you'll need to read your compiler and linker's
-manual to figure out what flags to add.
-
-### As a Shared Library (DLL)
-
-Google Test is compact, so most users can build and link it as a static library
-for the simplicity. You can choose to use Google Test as a shared library (known
-as a DLL on Windows) if you prefer.
-
-To compile *gtest* as a shared library, add
-
-    -DGTEST_CREATE_SHARED_LIBRARY=1
-
-to the compiler flags. You'll also need to tell the linker to produce a shared
-library instead - consult your linker's manual for how to do it.
-
-To compile your *tests* that use the gtest shared library, add
-
-    -DGTEST_LINKED_AS_SHARED_LIBRARY=1
-
-to the compiler flags.
-
-Note: while the above steps aren't technically necessary today when using some
-compilers (e.g. GCC), they may become necessary in the future, if we decide to
-improve the speed of loading the library (see
-<http://gcc.gnu.org/wiki/Visibility> for details). Therefore you are recommended
-to always add the above flags when using Google Test as a shared library.
-Otherwise a future release of Google Test may break your build script.
-
-### Avoiding Macro Name Clashes
-
-In C++, macros don't obey namespaces. Therefore two libraries that both define a
-macro of the same name will clash if you `#include` both definitions. In case a
-Google Test macro clashes with another library, you can force Google Test to
-rename its macro to avoid the conflict.
-
-Specifically, if both Google Test and some other code define macro FOO, you can
-add
-
-    -DGTEST_DONT_DEFINE_FOO=1
-
-to the compiler flags to tell Google Test to change the macro's name from `FOO`
-to `GTEST_FOO`. Currently `FOO` can be `FAIL`, `SUCCEED`, or `TEST`. For
-example, with `-DGTEST_DONT_DEFINE_TEST=1`, you'll need to write
-
-    GTEST_TEST(SomeTest, DoesThis) { ... }
-
-instead of
-
-    TEST(SomeTest, DoesThis) { ... }
-
-in order to define a test.
diff --git a/3rdparty/gtest/cmake/Config.cmake.in b/3rdparty/gtest/cmake/Config.cmake.in
deleted file mode 100644
index 12be4498..00000000
--- a/3rdparty/gtest/cmake/Config.cmake.in
+++ /dev/null
@@ -1,9 +0,0 @@
-@PACKAGE_INIT@
-include(CMakeFindDependencyMacro)
-if (@GTEST_HAS_PTHREAD@)
-  set(THREADS_PREFER_PTHREAD_FLAG @THREADS_PREFER_PTHREAD_FLAG@)
-  find_dependency(Threads)
-endif()
-
-include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")
-check_required_components("@project_name@")
diff --git a/3rdparty/gtest/cmake/gtest.pc.in b/3rdparty/gtest/cmake/gtest.pc.in
deleted file mode 100644
index 9aae29e2..00000000
--- a/3rdparty/gtest/cmake/gtest.pc.in
+++ /dev/null
@@ -1,10 +0,0 @@
-prefix=${pcfiledir}/../..
-libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
-includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
-
-Name: gtest
-Description: GoogleTest (without main() function)
-Version: @PROJECT_VERSION@
-URL: https://github.com/google/googletest
-Libs: -L${libdir} -lgtest @CMAKE_THREAD_LIBS_INIT@
-Cflags: -I${includedir} @GTEST_HAS_PTHREAD_MACRO@ @CMAKE_THREAD_LIBS_INIT@
diff --git a/3rdparty/gtest/cmake/gtest_main.pc.in b/3rdparty/gtest/cmake/gtest_main.pc.in
deleted file mode 100644
index 915f2973..00000000
--- a/3rdparty/gtest/cmake/gtest_main.pc.in
+++ /dev/null
@@ -1,11 +0,0 @@
-prefix=${pcfiledir}/../..
-libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
-includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
-
-Name: gtest_main
-Description: GoogleTest (with main() function)
-Version: @PROJECT_VERSION@
-URL: https://github.com/google/googletest
-Requires: gtest
-Libs: -L${libdir} -lgtest_main @CMAKE_THREAD_LIBS_INIT@
-Cflags: -I${includedir} @GTEST_HAS_PTHREAD_MACRO@ @CMAKE_THREAD_LIBS_INIT@
diff --git a/3rdparty/gtest/cmake/internal_utils.cmake b/3rdparty/gtest/cmake/internal_utils.cmake
deleted file mode 100644
index 2f70f0b0..00000000
--- a/3rdparty/gtest/cmake/internal_utils.cmake
+++ /dev/null
@@ -1,358 +0,0 @@
-# Defines functions and macros useful for building Google Test and
-# Google Mock.
-#
-# Note:
-#
-# - This file will be run twice when building Google Mock (once via
-#   Google Test's CMakeLists.txt, and once via Google Mock's).
-#   Therefore it shouldn't have any side effects other than defining
-#   the functions and macros.
-#
-# - The functions/macros defined in this file may depend on Google
-#   Test and Google Mock's option() definitions, and thus must be
-#   called *after* the options have been defined.
-
-if (POLICY CMP0054)
-  cmake_policy(SET CMP0054 NEW)
-endif (POLICY CMP0054)
-
-# Tweaks CMake's default compiler/linker settings to suit Google Test's needs.
-#
-# This must be a macro(), as inside a function string() can only
-# update variables in the function scope.
-macro(fix_default_compiler_settings_)
-  if (MSVC)
-    # For MSVC, CMake sets certain flags to defaults we want to override.
-    # This replacement code is taken from sample in the CMake Wiki at
-    # https://gitlab.kitware.com/cmake/community/wikis/FAQ#dynamic-replace.
-    foreach (flag_var
-             CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
-             CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
-             CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
-             CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
-      if (NOT BUILD_SHARED_LIBS AND NOT gtest_force_shared_crt)
-        # When Google Test is built as a shared library, it should also use
-        # shared runtime libraries.  Otherwise, it may end up with multiple
-        # copies of runtime library data in different modules, resulting in
-        # hard-to-find crashes. When it is built as a static library, it is
-        # preferable to use CRT as static libraries, as we don't have to rely
-        # on CRT DLLs being available. CMake always defaults to using shared
-        # CRT libraries, so we override that default here.
-        string(REPLACE "/MD" "-MT" ${flag_var} "${${flag_var}}")
-      endif()
-
-      # We prefer more strict warning checking for building Google Test.
-      # Replaces /W3 with /W4 in defaults.
-      string(REPLACE "/W3" "/W4" ${flag_var} "${${flag_var}}")
-
-      # Prevent D9025 warning for targets that have exception handling
-      # turned off (/EHs-c- flag). Where required, exceptions are explicitly
-      # re-enabled using the cxx_exception_flags variable.
-      string(REPLACE "/EHsc" "" ${flag_var} "${${flag_var}}")
-    endforeach()
-  endif()
-endmacro()
-
-# Defines the compiler/linker flags used to build Google Test and
-# Google Mock.  You can tweak these definitions to suit your need.  A
-# variable's value is empty before it's explicitly assigned to.
-macro(config_compiler_and_linker)
-  # Note: pthreads on MinGW is not supported, even if available
-  # instead, we use windows threading primitives
-  unset(GTEST_HAS_PTHREAD)
-  if (NOT gtest_disable_pthreads AND NOT MINGW)
-    # Defines CMAKE_USE_PTHREADS_INIT and CMAKE_THREAD_LIBS_INIT.
-    find_package(Threads)
-    if (CMAKE_USE_PTHREADS_INIT)
-      set(GTEST_HAS_PTHREAD ON)
-    endif()
-  endif()
-
-  fix_default_compiler_settings_()
-  if (MSVC)
-    # Newlines inside flags variables break CMake's NMake generator.
-    # TODO(vladl@google.com): Add -RTCs and -RTCu to debug builds.
-    set(cxx_base_flags "-GS -W4 -WX -wd4251 -wd4275 -nologo -J -Zi")
-    set(cxx_base_flags "${cxx_base_flags} -D_UNICODE -DUNICODE -DWIN32 -D_WIN32")
-    set(cxx_base_flags "${cxx_base_flags} -DSTRICT -DWIN32_LEAN_AND_MEAN")
-    set(cxx_exception_flags "-EHsc -D_HAS_EXCEPTIONS=1")
-    set(cxx_no_exception_flags "-EHs-c- -D_HAS_EXCEPTIONS=0")
-    set(cxx_no_rtti_flags "-GR-")
-    # Suppress "unreachable code" warning
-    # http://stackoverflow.com/questions/3232669 explains the issue.
-    set(cxx_base_flags "${cxx_base_flags} -wd4702")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-    set(cxx_base_flags "-Wall -Wshadow -Werror -Wconversion")
-    set(cxx_exception_flags "-fexceptions")
-    set(cxx_no_exception_flags "-fno-exceptions")
-    set(cxx_strict_flags "-W -Wpointer-arith -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wunused-parameter -Wcast-align -Wchar-subscripts -Winline -Wredundant-decls")
-    set(cxx_no_rtti_flags "-fno-rtti")
-  elseif (CMAKE_COMPILER_IS_GNUCXX)
-    set(cxx_base_flags "-Wall -Wshadow -Werror")
-    if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0.0)
-      set(cxx_base_flags "${cxx_base_flags} -Wno-error=dangling-else")
-    endif()
-    set(cxx_exception_flags "-fexceptions")
-    set(cxx_no_exception_flags "-fno-exceptions")
-    # Until version 4.3.2, GCC doesn't define a macro to indicate
-    # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI
-    # explicitly.
-    set(cxx_no_rtti_flags "-fno-rtti -DGTEST_HAS_RTTI=0")
-    set(cxx_strict_flags
-      "-Wextra -Wno-unused-parameter -Wno-missing-field-initializers")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "SunPro")
-    set(cxx_exception_flags "-features=except")
-    # Sun Pro doesn't provide macros to indicate whether exceptions and
-    # RTTI are enabled, so we define GTEST_HAS_* explicitly.
-    set(cxx_no_exception_flags "-features=no%except -DGTEST_HAS_EXCEPTIONS=0")
-    set(cxx_no_rtti_flags "-features=no%rtti -DGTEST_HAS_RTTI=0")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "VisualAge" OR
-      CMAKE_CXX_COMPILER_ID STREQUAL "XL")
-    # CMake 2.8 changes Visual Age's compiler ID to "XL".
-    set(cxx_exception_flags "-qeh")
-    set(cxx_no_exception_flags "-qnoeh")
-    # Until version 9.0, Visual Age doesn't define a macro to indicate
-    # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI
-    # explicitly.
-    set(cxx_no_rtti_flags "-qnortti -DGTEST_HAS_RTTI=0")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "HP")
-    set(cxx_base_flags "-AA -mt")
-    set(cxx_exception_flags "-DGTEST_HAS_EXCEPTIONS=1")
-    set(cxx_no_exception_flags "+noeh -DGTEST_HAS_EXCEPTIONS=0")
-    # RTTI can not be disabled in HP aCC compiler.
-    set(cxx_no_rtti_flags "")
-  endif()
-
-  # The pthreads library is available and allowed?
-  if (DEFINED GTEST_HAS_PTHREAD)
-    set(GTEST_HAS_PTHREAD_MACRO "-DGTEST_HAS_PTHREAD=1")
-  else()
-    set(GTEST_HAS_PTHREAD_MACRO "-DGTEST_HAS_PTHREAD=0")
-  endif()
-  set(cxx_base_flags "${cxx_base_flags} ${GTEST_HAS_PTHREAD_MACRO}")
-
-  # For building gtest's own tests and samples.
-  set(cxx_exception "${cxx_base_flags} ${cxx_exception_flags}")
-  set(cxx_no_exception
-    "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_no_exception_flags}")
-  set(cxx_default "${cxx_exception}")
-  set(cxx_no_rtti "${cxx_default} ${cxx_no_rtti_flags}")
-
-  # For building the gtest libraries.
-  set(cxx_strict "${cxx_default} ${cxx_strict_flags}")
-endmacro()
-
-# Defines the gtest & gtest_main libraries.  User tests should link
-# with one of them.
-function(cxx_library_with_type name type cxx_flags)
-  # type can be either STATIC or SHARED to denote a static or shared library.
-  # ARGN refers to additional arguments after 'cxx_flags'.
-  add_library(${name} ${type} ${ARGN})
-  set_target_properties(${name}
-    PROPERTIES
-    COMPILE_FLAGS "${cxx_flags}")
-  # Generate debug library name with a postfix.
-  set_target_properties(${name}
-    PROPERTIES
-    DEBUG_POSTFIX "d")
-  # Set the output directory for build artifacts
-  set_target_properties(${name}
-    PROPERTIES
-    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
-    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
-    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
-    PDB_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
-  # make PDBs match library name
-  get_target_property(pdb_debug_postfix ${name} DEBUG_POSTFIX)
-  set_target_properties(${name}
-    PROPERTIES
-    PDB_NAME "${name}"
-    PDB_NAME_DEBUG "${name}${pdb_debug_postfix}"
-    COMPILE_PDB_NAME "${name}"
-    COMPILE_PDB_NAME_DEBUG "${name}${pdb_debug_postfix}")
-
-  if (BUILD_SHARED_LIBS OR type STREQUAL "SHARED")
-    set_target_properties(${name}
-      PROPERTIES
-      COMPILE_DEFINITIONS "GTEST_CREATE_SHARED_LIBRARY=1")
-    if (NOT "${CMAKE_VERSION}" VERSION_LESS "2.8.11")
-      target_compile_definitions(${name} INTERFACE
-        $<INSTALL_INTERFACE:GTEST_LINKED_AS_SHARED_LIBRARY=1>)
-    endif()
-  endif()
-  if (DEFINED GTEST_HAS_PTHREAD)
-    if ("${CMAKE_VERSION}" VERSION_LESS "3.1.0")
-      set(threads_spec ${CMAKE_THREAD_LIBS_INIT})
-    else()
-      set(threads_spec Threads::Threads)
-    endif()
-    target_link_libraries(${name} PUBLIC ${threads_spec})
-  endif()
-endfunction()
-
-########################################################################
-#
-# Helper functions for creating build targets.
-
-function(cxx_shared_library name cxx_flags)
-  cxx_library_with_type(${name} SHARED "${cxx_flags}" ${ARGN})
-endfunction()
-
-function(cxx_library name cxx_flags)
-  cxx_library_with_type(${name} "" "${cxx_flags}" ${ARGN})
-endfunction()
-
-# cxx_executable_with_flags(name cxx_flags libs srcs...)
-#
-# creates a named C++ executable that depends on the given libraries and
-# is built from the given source files with the given compiler flags.
-function(cxx_executable_with_flags name cxx_flags libs)
-  add_executable(${name} ${ARGN})
-  if (MSVC)
-    # BigObj required for tests.
-    set(cxx_flags "${cxx_flags} -bigobj")
-  endif()
-  if (cxx_flags)
-    set_target_properties(${name}
-      PROPERTIES
-      COMPILE_FLAGS "${cxx_flags}")
-  endif()
-  if (BUILD_SHARED_LIBS)
-    set_target_properties(${name}
-      PROPERTIES
-      COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
-  endif()
-  # To support mixing linking in static and dynamic libraries, link each
-  # library in with an extra call to target_link_libraries.
-  foreach (lib "${libs}")
-    target_link_libraries(${name} ${lib})
-  endforeach()
-endfunction()
-
-# cxx_executable(name dir lib srcs...)
-#
-# creates a named target that depends on the given libs and is built
-# from the given source files.  dir/name.cc is implicitly included in
-# the source file list.
-function(cxx_executable name dir libs)
-  cxx_executable_with_flags(
-    ${name} "${cxx_default}" "${libs}" "${dir}/${name}.cc" ${ARGN})
-endfunction()
-
-# Sets PYTHONINTERP_FOUND and PYTHON_EXECUTABLE.
-find_package(PythonInterp)
-
-# cxx_test_with_flags(name cxx_flags libs srcs...)
-#
-# creates a named C++ test that depends on the given libs and is built
-# from the given source files with the given compiler flags.
-function(cxx_test_with_flags name cxx_flags libs)
-  cxx_executable_with_flags(${name} "${cxx_flags}" "${libs}" ${ARGN})
-  if (WIN32 OR MINGW)
-    add_test(NAME ${name}
-      COMMAND "powershell" "-Command" "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/RunTest.ps1" "$<TARGET_FILE:${name}>")
-  else()
-    add_test(NAME ${name}
-      COMMAND "$<TARGET_FILE:${name}>")
-  endif()
-endfunction()
-
-# cxx_test(name libs srcs...)
-#
-# creates a named test target that depends on the given libs and is
-# built from the given source files.  Unlike cxx_test_with_flags,
-# test/name.cc is already implicitly included in the source file list.
-function(cxx_test name libs)
-  cxx_test_with_flags("${name}" "${cxx_default}" "${libs}"
-    "test/${name}.cc" ${ARGN})
-endfunction()
-
-# py_test(name)
-#
-# creates a Python test with the given name whose main module is in
-# test/name.py.  It does nothing if Python is not installed.
-function(py_test name)
-  if (PYTHONINTERP_FOUND)
-    if ("${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}" VERSION_GREATER 3.1)
-      if (CMAKE_CONFIGURATION_TYPES)
-        # Multi-configuration build generators as for Visual Studio save
-        # output in a subdirectory of CMAKE_CURRENT_BINARY_DIR (Debug,
-        # Release etc.), so we have to provide it here.
-        if (WIN32 OR MINGW)
-          add_test(NAME ${name}
-            COMMAND powershell -Command ${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/RunTest.ps1
-              ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-              --build_dir=${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG> ${ARGN})
-        else()
-          add_test(NAME ${name}
-            COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-              --build_dir=${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG> ${ARGN})
-        endif()
-      else (CMAKE_CONFIGURATION_TYPES)
-        # Single-configuration build generators like Makefile generators
-        # don't have subdirs below CMAKE_CURRENT_BINARY_DIR.
-        if (WIN32 OR MINGW)
-          add_test(NAME ${name}
-            COMMAND powershell -Command ${CMAKE_CURRENT_BINARY_DIR}/RunTest.ps1
-              ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-              --build_dir=${CMAKE_CURRENT_BINARY_DIR} ${ARGN})
-        else()
-          add_test(NAME ${name}
-            COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-              --build_dir=${CMAKE_CURRENT_BINARY_DIR} ${ARGN})
-        endif()
-      endif (CMAKE_CONFIGURATION_TYPES)
-    else()
-      # ${CMAKE_CURRENT_BINARY_DIR} is known at configuration time, so we can
-      # directly bind it from cmake. ${CTEST_CONFIGURATION_TYPE} is known
-      # only at ctest runtime (by calling ctest -c <Configuration>), so
-      # we have to escape $ to delay variable substitution here.
-      if (WIN32 OR MINGW)
-        add_test(NAME ${name}
-          COMMAND powershell -Command ${CMAKE_CURRENT_BINARY_DIR}/RunTest.ps1
-            ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-            --build_dir=${CMAKE_CURRENT_BINARY_DIR}/\${CTEST_CONFIGURATION_TYPE} ${ARGN})
-      else()
-        add_test(NAME ${name}
-          COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-            --build_dir=${CMAKE_CURRENT_BINARY_DIR}/\${CTEST_CONFIGURATION_TYPE} ${ARGN})
-      endif()
-    endif()
-  endif(PYTHONINTERP_FOUND)
-endfunction()
-
-# install_project(targets...)
-#
-# Installs the specified targets and configures the associated pkgconfig files.
-function(install_project)
-  if(INSTALL_GTEST)
-    install(DIRECTORY "${PROJECT_SOURCE_DIR}/include/"
-      DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
-    # Install the project targets.
-    install(TARGETS ${ARGN}
-      EXPORT ${targets_export_name}
-      RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
-      ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
-      LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}")
-    if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
-      # Install PDBs
-      foreach(t ${ARGN})
-        get_target_property(t_pdb_name ${t} COMPILE_PDB_NAME)
-        get_target_property(t_pdb_name_debug ${t} COMPILE_PDB_NAME_DEBUG)
-        get_target_property(t_pdb_output_directory ${t} PDB_OUTPUT_DIRECTORY)
-        install(FILES
-          "${t_pdb_output_directory}/\${CMAKE_INSTALL_CONFIG_NAME}/$<$<CONFIG:Debug>:${t_pdb_name_debug}>$<$<NOT:$<CONFIG:Debug>>:${t_pdb_name}>.pdb"
-          DESTINATION ${CMAKE_INSTALL_LIBDIR}
-          OPTIONAL)
-      endforeach()
-    endif()
-    # Configure and install pkgconfig files.
-    foreach(t ${ARGN})
-      set(configured_pc "${generated_dir}/${t}.pc")
-      configure_file("${PROJECT_SOURCE_DIR}/cmake/${t}.pc.in"
-        "${configured_pc}" @ONLY)
-      install(FILES "${configured_pc}"
-        DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
-    endforeach()
-  endif()
-endfunction()
diff --git a/3rdparty/gtest/cmake/libgtest.la.in b/3rdparty/gtest/cmake/libgtest.la.in
deleted file mode 100644
index 840c8388..00000000
--- a/3rdparty/gtest/cmake/libgtest.la.in
+++ /dev/null
@@ -1,21 +0,0 @@
-# libgtest.la - a libtool library file
-# Generated by libtool (GNU libtool) 2.4.6
-
-# Please DO NOT delete this file!
-# It is necessary for linking the library.
-
-# Names of this library.
-library_names='libgtest.so'
-
-# Is this an already installed library?
-installed=yes
-
-# Should we warn about portability when linking against -modules?
-shouldnotlink=no
-
-# Files to dlopen/dlpreopen
-dlopen=''
-dlpreopen=''
-
-# Directory that this library needs to be installed in:
-libdir='@CMAKE_INSTALL_FULL_LIBDIR@'
diff --git a/3rdparty/gtest/docs/advanced.md b/3rdparty/gtest/docs/advanced.md
deleted file mode 100644
index 3e5f779d..00000000
--- a/3rdparty/gtest/docs/advanced.md
+++ /dev/null
@@ -1,2567 +0,0 @@
-# Advanced googletest Topics
-
-<!-- GOOGLETEST_CM0016 DO NOT DELETE -->
-
-## Introduction
-
-Now that you have read the [googletest Primer](primer.md) and learned how to
-write tests using googletest, it's time to learn some new tricks. This document
-will show you more assertions as well as how to construct complex failure
-messages, propagate fatal failures, reuse and speed up your test fixtures, and
-use various flags with your tests.
-
-## More Assertions
-
-This section covers some less frequently used, but still significant,
-assertions.
-
-### Explicit Success and Failure
-
-These three assertions do not actually test a value or expression. Instead, they
-generate a success or failure directly. Like the macros that actually perform a
-test, you may stream a custom failure message into them.
-
-```c++
-SUCCEED();
-```
-
-Generates a success. This does **NOT** make the overall test succeed. A test is
-considered successful only if none of its assertions fail during its execution.
-
-NOTE: `SUCCEED()` is purely documentary and currently doesn't generate any
-user-visible output. However, we may add `SUCCEED()` messages to googletest's
-output in the future.
-
-```c++
-FAIL();
-ADD_FAILURE();
-ADD_FAILURE_AT("file_path", line_number);
-```
-
-`FAIL()` generates a fatal failure, while `ADD_FAILURE()` and `ADD_FAILURE_AT()`
-generate a nonfatal failure. These are useful when control flow, rather than a
-Boolean expression, determines the test's success or failure. For example, you
-might want to write something like:
-
-```c++
-switch(expression) {
-  case 1:
-     ... some checks ...
-  case 2:
-     ... some other checks ...
-  default:
-     FAIL() << "We shouldn't get here.";
-}
-```
-
-NOTE: you can only use `FAIL()` in functions that return `void`. See the
-[Assertion Placement section](#assertion-placement) for more information.
-
-### Exception Assertions
-
-These are for verifying that a piece of code throws (or does not throw) an
-exception of the given type:
-
-Fatal assertion                            | Nonfatal assertion                         | Verifies
------------------------------------------- | ------------------------------------------ | --------
-`ASSERT_THROW(statement, exception_type);` | `EXPECT_THROW(statement, exception_type);` | `statement` throws an exception of the given type
-`ASSERT_ANY_THROW(statement);`             | `EXPECT_ANY_THROW(statement);`             | `statement` throws an exception of any type
-`ASSERT_NO_THROW(statement);`              | `EXPECT_NO_THROW(statement);`              | `statement` doesn't throw any exception
-
-Examples:
-
-```c++
-ASSERT_THROW(Foo(5), bar_exception);
-
-EXPECT_NO_THROW({
-  int n = 5;
-  Bar(&n);
-});
-```
-
-**Availability**: requires exceptions to be enabled in the build environment
-
-### Predicate Assertions for Better Error Messages
-
-Even though googletest has a rich set of assertions, they can never be complete,
-as it's impossible (nor a good idea) to anticipate all scenarios a user might
-run into. Therefore, sometimes a user has to use `EXPECT_TRUE()` to check a
-complex expression, for lack of a better macro. This has the problem of not
-showing you the values of the parts of the expression, making it hard to
-understand what went wrong. As a workaround, some users choose to construct the
-failure message by themselves, streaming it into `EXPECT_TRUE()`. However, this
-is awkward especially when the expression has side-effects or is expensive to
-evaluate.
-
-googletest gives you three different options to solve this problem:
-
-#### Using an Existing Boolean Function
-
-If you already have a function or functor that returns `bool` (or a type that
-can be implicitly converted to `bool`), you can use it in a *predicate
-assertion* to get the function arguments printed for free:
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-| Fatal assertion                   | Nonfatal assertion                | Verifies                    |
-| --------------------------------- | --------------------------------- | --------------------------- |
-| `ASSERT_PRED1(pred1, val1)`       | `EXPECT_PRED1(pred1, val1)`       | `pred1(val1)` is true       |
-| `ASSERT_PRED2(pred2, val1, val2)` | `EXPECT_PRED2(pred2, val1, val2)` | `pred1(val1, val2)` is true |
-| `...`                             | `...`                             | `...`                       |
-
-<!-- mdformat on-->
-In the above, `predn` is an `n`-ary predicate function or functor, where `val1`,
-`val2`, ..., and `valn` are its arguments. The assertion succeeds if the
-predicate returns `true` when applied to the given arguments, and fails
-otherwise. When the assertion fails, it prints the value of each argument. In
-either case, the arguments are evaluated exactly once.
-
-Here's an example. Given
-
-```c++
-// Returns true if m and n have no common divisors except 1.
-bool MutuallyPrime(int m, int n) { ... }
-
-const int a = 3;
-const int b = 4;
-const int c = 10;
-```
-
-the assertion
-
-```c++
-  EXPECT_PRED2(MutuallyPrime, a, b);
-```
-
-will succeed, while the assertion
-
-```c++
-  EXPECT_PRED2(MutuallyPrime, b, c);
-```
-
-will fail with the message
-
-```none
-MutuallyPrime(b, c) is false, where
-b is 4
-c is 10
-```
-
-> NOTE:
->
-> 1.  If you see a compiler error "no matching function to call" when using
->     `ASSERT_PRED*` or `EXPECT_PRED*`, please see
->     [this](faq.md#the-compiler-complains-no-matching-function-to-call-when-i-use-assert-pred-how-do-i-fix-it)
->     for how to resolve it.
-
-#### Using a Function That Returns an AssertionResult
-
-While `EXPECT_PRED*()` and friends are handy for a quick job, the syntax is not
-satisfactory: you have to use different macros for different arities, and it
-feels more like Lisp than C++. The `::testing::AssertionResult` class solves
-this problem.
-
-An `AssertionResult` object represents the result of an assertion (whether it's
-a success or a failure, and an associated message). You can create an
-`AssertionResult` using one of these factory functions:
-
-```c++
-namespace testing {
-
-// Returns an AssertionResult object to indicate that an assertion has
-// succeeded.
-AssertionResult AssertionSuccess();
-
-// Returns an AssertionResult object to indicate that an assertion has
-// failed.
-AssertionResult AssertionFailure();
-
-}
-```
-
-You can then use the `<<` operator to stream messages to the `AssertionResult`
-object.
-
-To provide more readable messages in Boolean assertions (e.g. `EXPECT_TRUE()`),
-write a predicate function that returns `AssertionResult` instead of `bool`. For
-example, if you define `IsEven()` as:
-
-```c++
-::testing::AssertionResult IsEven(int n) {
-  if ((n % 2) == 0)
-     return ::testing::AssertionSuccess();
-  else
-     return ::testing::AssertionFailure() << n << " is odd";
-}
-```
-
-instead of:
-
-```c++
-bool IsEven(int n) {
-  return (n % 2) == 0;
-}
-```
-
-the failed assertion `EXPECT_TRUE(IsEven(Fib(4)))` will print:
-
-```none
-Value of: IsEven(Fib(4))
-  Actual: false (3 is odd)
-Expected: true
-```
-
-instead of a more opaque
-
-```none
-Value of: IsEven(Fib(4))
-  Actual: false
-Expected: true
-```
-
-If you want informative messages in `EXPECT_FALSE` and `ASSERT_FALSE` as well
-(one third of Boolean assertions in the Google code base are negative ones), and
-are fine with making the predicate slower in the success case, you can supply a
-success message:
-
-```c++
-::testing::AssertionResult IsEven(int n) {
-  if ((n % 2) == 0)
-     return ::testing::AssertionSuccess() << n << " is even";
-  else
-     return ::testing::AssertionFailure() << n << " is odd";
-}
-```
-
-Then the statement `EXPECT_FALSE(IsEven(Fib(6)))` will print
-
-```none
-  Value of: IsEven(Fib(6))
-     Actual: true (8 is even)
-  Expected: false
-```
-
-#### Using a Predicate-Formatter
-
-If you find the default message generated by `(ASSERT|EXPECT)_PRED*` and
-`(ASSERT|EXPECT)_(TRUE|FALSE)` unsatisfactory, or some arguments to your
-predicate do not support streaming to `ostream`, you can instead use the
-following *predicate-formatter assertions* to *fully* customize how the message
-is formatted:
-
-Fatal assertion                                  | Nonfatal assertion                               | Verifies
------------------------------------------------- | ------------------------------------------------ | --------
-`ASSERT_PRED_FORMAT1(pred_format1, val1);`       | `EXPECT_PRED_FORMAT1(pred_format1, val1);`       | `pred_format1(val1)` is successful
-`ASSERT_PRED_FORMAT2(pred_format2, val1, val2);` | `EXPECT_PRED_FORMAT2(pred_format2, val1, val2);` | `pred_format2(val1, val2)` is successful
-`...`                                            | `...`                                            | ...
-
-The difference between this and the previous group of macros is that instead of
-a predicate, `(ASSERT|EXPECT)_PRED_FORMAT*` take a *predicate-formatter*
-(`pred_formatn`), which is a function or functor with the signature:
-
-```c++
-::testing::AssertionResult PredicateFormattern(const char* expr1,
-                                               const char* expr2,
-                                               ...
-                                               const char* exprn,
-                                               T1 val1,
-                                               T2 val2,
-                                               ...
-                                               Tn valn);
-```
-
-where `val1`, `val2`, ..., and `valn` are the values of the predicate arguments,
-and `expr1`, `expr2`, ..., and `exprn` are the corresponding expressions as they
-appear in the source code. The types `T1`, `T2`, ..., and `Tn` can be either
-value types or reference types. For example, if an argument has type `Foo`, you
-can declare it as either `Foo` or `const Foo&`, whichever is appropriate.
-
-As an example, let's improve the failure message in `MutuallyPrime()`, which was
-used with `EXPECT_PRED2()`:
-
-```c++
-// Returns the smallest prime common divisor of m and n,
-// or 1 when m and n are mutually prime.
-int SmallestPrimeCommonDivisor(int m, int n) { ... }
-
-// A predicate-formatter for asserting that two integers are mutually prime.
-::testing::AssertionResult AssertMutuallyPrime(const char* m_expr,
-                                               const char* n_expr,
-                                               int m,
-                                               int n) {
-  if (MutuallyPrime(m, n)) return ::testing::AssertionSuccess();
-
-  return ::testing::AssertionFailure() << m_expr << " and " << n_expr
-      << " (" << m << " and " << n << ") are not mutually prime, "
-      << "as they have a common divisor " << SmallestPrimeCommonDivisor(m, n);
-}
-```
-
-With this predicate-formatter, we can use
-
-```c++
-  EXPECT_PRED_FORMAT2(AssertMutuallyPrime, b, c);
-```
-
-to generate the message
-
-```none
-b and c (4 and 10) are not mutually prime, as they have a common divisor 2.
-```
-
-As you may have realized, many of the built-in assertions we introduced earlier
-are special cases of `(EXPECT|ASSERT)_PRED_FORMAT*`. In fact, most of them are
-indeed defined using `(EXPECT|ASSERT)_PRED_FORMAT*`.
-
-### Floating-Point Comparison
-
-Comparing floating-point numbers is tricky. Due to round-off errors, it is very
-unlikely that two floating-points will match exactly. Therefore, `ASSERT_EQ` 's
-naive comparison usually doesn't work. And since floating-points can have a wide
-value range, no single fixed error bound works. It's better to compare by a
-fixed relative error bound, except for values close to 0 due to the loss of
-precision there.
-
-In general, for floating-point comparison to make sense, the user needs to
-carefully choose the error bound. If they don't want or care to, comparing in
-terms of Units in the Last Place (ULPs) is a good default, and googletest
-provides assertions to do this. Full details about ULPs are quite long; if you
-want to learn more, see
-[here](https://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/).
-
-#### Floating-Point Macros
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-| Fatal assertion                 | Nonfatal assertion              | Verifies                                 |
-| ------------------------------- | ------------------------------- | ---------------------------------------- |
-| `ASSERT_FLOAT_EQ(val1, val2);`  | `EXPECT_FLOAT_EQ(val1, val2);`  | the two `float` values are almost equal  |
-| `ASSERT_DOUBLE_EQ(val1, val2);` | `EXPECT_DOUBLE_EQ(val1, val2);` | the two `double` values are almost equal |
-
-<!-- mdformat on-->
-
-By "almost equal" we mean the values are within 4 ULP's from each other.
-
-The following assertions allow you to choose the acceptable error bound:
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-| Fatal assertion                       | Nonfatal assertion                    | Verifies                                                                         |
-| ------------------------------------- | ------------------------------------- | -------------------------------------------------------------------------------- |
-| `ASSERT_NEAR(val1, val2, abs_error);` | `EXPECT_NEAR(val1, val2, abs_error);` | the difference between `val1` and `val2` doesn't exceed the given absolute error |
-
-<!-- mdformat on-->
-
-#### Floating-Point Predicate-Format Functions
-
-Some floating-point operations are useful, but not that often used. In order to
-avoid an explosion of new macros, we provide them as predicate-format functions
-that can be used in predicate assertion macros (e.g. `EXPECT_PRED_FORMAT2`,
-etc).
-
-```c++
-EXPECT_PRED_FORMAT2(::testing::FloatLE, val1, val2);
-EXPECT_PRED_FORMAT2(::testing::DoubleLE, val1, val2);
-```
-
-Verifies that `val1` is less than, or almost equal to, `val2`. You can replace
-`EXPECT_PRED_FORMAT2` in the above table with `ASSERT_PRED_FORMAT2`.
-
-### Asserting Using gMock Matchers
-
-[gMock](../../googlemock) comes with a library of matchers for validating
-arguments passed to mock objects. A gMock *matcher* is basically a predicate
-that knows how to describe itself. It can be used in these assertion macros:
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-| Fatal assertion                | Nonfatal assertion             | Verifies              |
-| ------------------------------ | ------------------------------ | --------------------- |
-| `ASSERT_THAT(value, matcher);` | `EXPECT_THAT(value, matcher);` | value matches matcher |
-
-<!-- mdformat on-->
-
-For example, `StartsWith(prefix)` is a matcher that matches a string starting
-with `prefix`, and you can write:
-
-```c++
-using ::testing::StartsWith;
-...
-    // Verifies that Foo() returns a string starting with "Hello".
-    EXPECT_THAT(Foo(), StartsWith("Hello"));
-```
-
-Read this
-[recipe](../../googlemock/docs/cook_book.md#using-matchers-in-googletest-assertions)
-in the gMock Cookbook for more details.
-
-gMock has a rich set of matchers. You can do many things googletest cannot do
-alone with them. For a list of matchers gMock provides, read
-[this](../../googlemock/docs/cook_book.md##using-matchers). It's easy to write
-your [own matchers](../../googlemock/docs/cook_book.md#NewMatchers) too.
-
-gMock is bundled with googletest, so you don't need to add any build dependency
-in order to take advantage of this. Just include `"testing/base/public/gmock.h"`
-and you're ready to go.
-
-### More String Assertions
-
-(Please read the [previous](#asserting-using-gmock-matchers) section first if
-you haven't.)
-
-You can use the gMock
-[string matchers](../../googlemock/docs/cheat_sheet.md#string-matchers) with
-`EXPECT_THAT()` or `ASSERT_THAT()` to do more string comparison tricks
-(sub-string, prefix, suffix, regular expression, and etc). For example,
-
-```c++
-using ::testing::HasSubstr;
-using ::testing::MatchesRegex;
-...
-  ASSERT_THAT(foo_string, HasSubstr("needle"));
-  EXPECT_THAT(bar_string, MatchesRegex("\\w*\\d+"));
-```
-
-If the string contains a well-formed HTML or XML document, you can check whether
-its DOM tree matches an
-[XPath expression](http://www.w3.org/TR/xpath/#contents):
-
-```c++
-// Currently still in //template/prototemplate/testing:xpath_matcher
-#include "template/prototemplate/testing/xpath_matcher.h"
-using prototemplate::testing::MatchesXPath;
-EXPECT_THAT(html_string, MatchesXPath("//a[text()='click here']"));
-```
-
-### Windows HRESULT assertions
-
-These assertions test for `HRESULT` success or failure.
-
-Fatal assertion                        | Nonfatal assertion                     | Verifies
--------------------------------------- | -------------------------------------- | --------
-`ASSERT_HRESULT_SUCCEEDED(expression)` | `EXPECT_HRESULT_SUCCEEDED(expression)` | `expression` is a success `HRESULT`
-`ASSERT_HRESULT_FAILED(expression)`    | `EXPECT_HRESULT_FAILED(expression)`    | `expression` is a failure `HRESULT`
-
-The generated output contains the human-readable error message associated with
-the `HRESULT` code returned by `expression`.
-
-You might use them like this:
-
-```c++
-CComPtr<IShellDispatch2> shell;
-ASSERT_HRESULT_SUCCEEDED(shell.CoCreateInstance(L"Shell.Application"));
-CComVariant empty;
-ASSERT_HRESULT_SUCCEEDED(shell->ShellExecute(CComBSTR(url), empty, empty, empty, empty));
-```
-
-### Type Assertions
-
-You can call the function
-
-```c++
-::testing::StaticAssertTypeEq<T1, T2>();
-```
-
-to assert that types `T1` and `T2` are the same. The function does nothing if
-the assertion is satisfied. If the types are different, the function call will
-fail to compile, the compiler error message will say that
-`type1 and type2 are not the same type` and most likely (depending on the compiler)
-show you the actual values of `T1` and `T2`. This is mainly useful inside
-template code.
-
-**Caveat**: When used inside a member function of a class template or a function
-template, `StaticAssertTypeEq<T1, T2>()` is effective only if the function is
-instantiated. For example, given:
-
-```c++
-template <typename T> class Foo {
- public:
-  void Bar() { ::testing::StaticAssertTypeEq<int, T>(); }
-};
-```
-
-the code:
-
-```c++
-void Test1() { Foo<bool> foo; }
-```
-
-will not generate a compiler error, as `Foo<bool>::Bar()` is never actually
-instantiated. Instead, you need:
-
-```c++
-void Test2() { Foo<bool> foo; foo.Bar(); }
-```
-
-to cause a compiler error.
-
-### Assertion Placement
-
-You can use assertions in any C++ function. In particular, it doesn't have to be
-a method of the test fixture class. The one constraint is that assertions that
-generate a fatal failure (`FAIL*` and `ASSERT_*`) can only be used in
-void-returning functions. This is a consequence of Google's not using
-exceptions. By placing it in a non-void function you'll get a confusing compile
-error like `"error: void value not ignored as it ought to be"` or `"cannot
-initialize return object of type 'bool' with an rvalue of type 'void'"` or
-`"error: no viable conversion from 'void' to 'string'"`.
-
-If you need to use fatal assertions in a function that returns non-void, one
-option is to make the function return the value in an out parameter instead. For
-example, you can rewrite `T2 Foo(T1 x)` to `void Foo(T1 x, T2* result)`. You
-need to make sure that `*result` contains some sensible value even when the
-function returns prematurely. As the function now returns `void`, you can use
-any assertion inside of it.
-
-If changing the function's type is not an option, you should just use assertions
-that generate non-fatal failures, such as `ADD_FAILURE*` and `EXPECT_*`.
-
-NOTE: Constructors and destructors are not considered void-returning functions,
-according to the C++ language specification, and so you may not use fatal
-assertions in them; you'll get a compilation error if you try. Instead, either
-call `abort` and crash the entire test executable, or put the fatal assertion in
-a `SetUp`/`TearDown` function; see
-[constructor/destructor vs. `SetUp`/`TearDown`](faq.md#CtorVsSetUp)
-
-WARNING: A fatal assertion in a helper function (private void-returning method)
-called from a constructor or destructor does not does not terminate the current
-test, as your intuition might suggest: it merely returns from the constructor or
-destructor early, possibly leaving your object in a partially-constructed or
-partially-destructed state! You almost certainly want to `abort` or use
-`SetUp`/`TearDown` instead.
-
-## Teaching googletest How to Print Your Values
-
-When a test assertion such as `EXPECT_EQ` fails, googletest prints the argument
-values to help you debug. It does this using a user-extensible value printer.
-
-This printer knows how to print built-in C++ types, native arrays, STL
-containers, and any type that supports the `<<` operator. For other types, it
-prints the raw bytes in the value and hopes that you the user can figure it out.
-
-As mentioned earlier, the printer is *extensible*. That means you can teach it
-to do a better job at printing your particular type than to dump the bytes. To
-do that, define `<<` for your type:
-
-```c++
-#include <ostream>
-
-namespace foo {
-
-class Bar {  // We want googletest to be able to print instances of this.
-...
-  // Create a free inline friend function.
-  friend std::ostream& operator<<(std::ostream& os, const Bar& bar) {
-    return os << bar.DebugString();  // whatever needed to print bar to os
-  }
-};
-
-// If you can't declare the function in the class it's important that the
-// << operator is defined in the SAME namespace that defines Bar.  C++'s look-up
-// rules rely on that.
-std::ostream& operator<<(std::ostream& os, const Bar& bar) {
-  return os << bar.DebugString();  // whatever needed to print bar to os
-}
-
-}  // namespace foo
-```
-
-Sometimes, this might not be an option: your team may consider it bad style to
-have a `<<` operator for `Bar`, or `Bar` may already have a `<<` operator that
-doesn't do what you want (and you cannot change it). If so, you can instead
-define a `PrintTo()` function like this:
-
-```c++
-#include <ostream>
-
-namespace foo {
-
-class Bar {
-  ...
-  friend void PrintTo(const Bar& bar, std::ostream* os) {
-    *os << bar.DebugString();  // whatever needed to print bar to os
-  }
-};
-
-// If you can't declare the function in the class it's important that PrintTo()
-// is defined in the SAME namespace that defines Bar.  C++'s look-up rules rely
-// on that.
-void PrintTo(const Bar& bar, std::ostream* os) {
-  *os << bar.DebugString();  // whatever needed to print bar to os
-}
-
-}  // namespace foo
-```
-
-If you have defined both `<<` and `PrintTo()`, the latter will be used when
-googletest is concerned. This allows you to customize how the value appears in
-googletest's output without affecting code that relies on the behavior of its
-`<<` operator.
-
-If you want to print a value `x` using googletest's value printer yourself, just
-call `::testing::PrintToString(x)`, which returns an `std::string`:
-
-```c++
-vector<pair<Bar, int> > bar_ints = GetBarIntVector();
-
-EXPECT_TRUE(IsCorrectBarIntVector(bar_ints))
-    << "bar_ints = " << ::testing::PrintToString(bar_ints);
-```
-
-## Death Tests
-
-In many applications, there are assertions that can cause application failure if
-a condition is not met. These sanity checks, which ensure that the program is in
-a known good state, are there to fail at the earliest possible time after some
-program state is corrupted. If the assertion checks the wrong condition, then
-the program may proceed in an erroneous state, which could lead to memory
-corruption, security holes, or worse. Hence it is vitally important to test that
-such assertion statements work as expected.
-
-Since these precondition checks cause the processes to die, we call such tests
-_death tests_. More generally, any test that checks that a program terminates
-(except by throwing an exception) in an expected fashion is also a death test.
-
-Note that if a piece of code throws an exception, we don't consider it "death"
-for the purpose of death tests, as the caller of the code could catch the
-exception and avoid the crash. If you want to verify exceptions thrown by your
-code, see [Exception Assertions](#ExceptionAssertions).
-
-If you want to test `EXPECT_*()/ASSERT_*()` failures in your test code, see
-Catching Failures
-
-### How to Write a Death Test
-
-googletest has the following macros to support death tests:
-
-Fatal assertion                                  | Nonfatal assertion                               | Verifies
------------------------------------------------- | ------------------------------------------------ | --------
-`ASSERT_DEATH(statement, matcher);`              | `EXPECT_DEATH(statement, matcher);`              | `statement` crashes with the given error
-`ASSERT_DEATH_IF_SUPPORTED(statement, matcher);` | `EXPECT_DEATH_IF_SUPPORTED(statement, matcher);` | if death tests are supported, verifies that `statement` crashes with the given error; otherwise verifies nothing
-`ASSERT_EXIT(statement, predicate, matcher);`    | `EXPECT_EXIT(statement, predicate, matcher);`    | `statement` exits with the given error, and its exit code matches `predicate`
-
-where `statement` is a statement that is expected to cause the process to die,
-`predicate` is a function or function object that evaluates an integer exit
-status, and `matcher` is either a GMock matcher matching a `const std::string&`
-or a (Perl) regular expression - either of which is matched against the stderr
-output of `statement`. For legacy reasons, a bare string (i.e. with no matcher)
-is interpreted as `ContainsRegex(str)`, **not** `Eq(str)`. Note that `statement`
-can be *any valid statement* (including *compound statement*) and doesn't have
-to be an expression.
-
-As usual, the `ASSERT` variants abort the current test function, while the
-`EXPECT` variants do not.
-
-> NOTE: We use the word "crash" here to mean that the process terminates with a
-> *non-zero* exit status code. There are two possibilities: either the process
-> has called `exit()` or `_exit()` with a non-zero value, or it may be killed by
-> a signal.
->
-> This means that if `*statement*` terminates the process with a 0 exit code, it
-> is *not* considered a crash by `EXPECT_DEATH`. Use `EXPECT_EXIT` instead if
-> this is the case, or if you want to restrict the exit code more precisely.
-
-A predicate here must accept an `int` and return a `bool`. The death test
-succeeds only if the predicate returns `true`. googletest defines a few
-predicates that handle the most common cases:
-
-```c++
-::testing::ExitedWithCode(exit_code)
-```
-
-This expression is `true` if the program exited normally with the given exit
-code.
-
-```c++
-::testing::KilledBySignal(signal_number)  // Not available on Windows.
-```
-
-This expression is `true` if the program was killed by the given signal.
-
-The `*_DEATH` macros are convenient wrappers for `*_EXIT` that use a predicate
-that verifies the process' exit code is non-zero.
-
-Note that a death test only cares about three things:
-
-1.  does `statement` abort or exit the process?
-2.  (in the case of `ASSERT_EXIT` and `EXPECT_EXIT`) does the exit status
-    satisfy `predicate`? Or (in the case of `ASSERT_DEATH` and `EXPECT_DEATH`)
-    is the exit status non-zero? And
-3.  does the stderr output match `regex`?
-
-In particular, if `statement` generates an `ASSERT_*` or `EXPECT_*` failure, it
-will **not** cause the death test to fail, as googletest assertions don't abort
-the process.
-
-To write a death test, simply use one of the above macros inside your test
-function. For example,
-
-```c++
-TEST(MyDeathTest, Foo) {
-  // This death test uses a compound statement.
-  ASSERT_DEATH({
-    int n = 5;
-    Foo(&n);
-  }, "Error on line .* of Foo()");
-}
-
-TEST(MyDeathTest, NormalExit) {
-  EXPECT_EXIT(NormalExit(), ::testing::ExitedWithCode(0), "Success");
-}
-
-TEST(MyDeathTest, KillMyself) {
-  EXPECT_EXIT(KillMyself(), ::testing::KilledBySignal(SIGKILL),
-              "Sending myself unblockable signal");
-}
-```
-
-verifies that:
-
-*   calling `Foo(5)` causes the process to die with the given error message,
-*   calling `NormalExit()` causes the process to print `"Success"` to stderr and
-    exit with exit code 0, and
-*   calling `KillMyself()` kills the process with signal `SIGKILL`.
-
-The test function body may contain other assertions and statements as well, if
-necessary.
-
-### Death Test Naming
-
-IMPORTANT: We strongly recommend you to follow the convention of naming your
-**test suite** (not test) `*DeathTest` when it contains a death test, as
-demonstrated in the above example. The
-[Death Tests And Threads](#death-tests-and-threads) section below explains why.
-
-If a test fixture class is shared by normal tests and death tests, you can use
-`using` or `typedef` to introduce an alias for the fixture class and avoid
-duplicating its code:
-
-```c++
-class FooTest : public ::testing::Test { ... };
-
-using FooDeathTest = FooTest;
-
-TEST_F(FooTest, DoesThis) {
-  // normal test
-}
-
-TEST_F(FooDeathTest, DoesThat) {
-  // death test
-}
-```
-
-### Regular Expression Syntax
-
-On POSIX systems (e.g. Linux, Cygwin, and Mac), googletest uses the
-[POSIX extended regular expression](http://www.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap09.html#tag_09_04)
-syntax. To learn about this syntax, you may want to read this
-[Wikipedia entry](http://en.wikipedia.org/wiki/Regular_expression#POSIX_Extended_Regular_Expressions).
-
-On Windows, googletest uses its own simple regular expression implementation. It
-lacks many features. For example, we don't support union (`"x|y"`), grouping
-(`"(xy)"`), brackets (`"[xy]"`), and repetition count (`"x{5,7}"`), among
-others. Below is what we do support (`A` denotes a literal character, period
-(`.`), or a single `\\ ` escape sequence; `x` and `y` denote regular
-expressions.):
-
-Expression | Meaning
----------- | --------------------------------------------------------------
-`c`        | matches any literal character `c`
-`\\d`      | matches any decimal digit
-`\\D`      | matches any character that's not a decimal digit
-`\\f`      | matches `\f`
-`\\n`      | matches `\n`
-`\\r`      | matches `\r`
-`\\s`      | matches any ASCII whitespace, including `\n`
-`\\S`      | matches any character that's not a whitespace
-`\\t`      | matches `\t`
-`\\v`      | matches `\v`
-`\\w`      | matches any letter, `_`, or decimal digit
-`\\W`      | matches any character that `\\w` doesn't match
-`\\c`      | matches any literal character `c`, which must be a punctuation
-`.`        | matches any single character except `\n`
-`A?`       | matches 0 or 1 occurrences of `A`
-`A*`       | matches 0 or many occurrences of `A`
-`A+`       | matches 1 or many occurrences of `A`
-`^`        | matches the beginning of a string (not that of each line)
-`$`        | matches the end of a string (not that of each line)
-`xy`       | matches `x` followed by `y`
-
-To help you determine which capability is available on your system, googletest
-defines macros to govern which regular expression it is using. The macros are:
-`GTEST_USES_SIMPLE_RE=1` or `GTEST_USES_POSIX_RE=1`. If you want your death
-tests to work in all cases, you can either `#if` on these macros or use the more
-limited syntax only.
-
-### How It Works
-
-Under the hood, `ASSERT_EXIT()` spawns a new process and executes the death test
-statement in that process. The details of how precisely that happens depend on
-the platform and the variable ::testing::GTEST_FLAG(death_test_style) (which is
-initialized from the command-line flag `--gtest_death_test_style`).
-
-*   On POSIX systems, `fork()` (or `clone()` on Linux) is used to spawn the
-    child, after which:
-    *   If the variable's value is `"fast"`, the death test statement is
-        immediately executed.
-    *   If the variable's value is `"threadsafe"`, the child process re-executes
-        the unit test binary just as it was originally invoked, but with some
-        extra flags to cause just the single death test under consideration to
-        be run.
-*   On Windows, the child is spawned using the `CreateProcess()` API, and
-    re-executes the binary to cause just the single death test under
-    consideration to be run - much like the `threadsafe` mode on POSIX.
-
-Other values for the variable are illegal and will cause the death test to fail.
-Currently, the flag's default value is **"fast"**
-
-1.  the child's exit status satisfies the predicate, and
-2.  the child's stderr matches the regular expression.
-
-If the death test statement runs to completion without dying, the child process
-will nonetheless terminate, and the assertion fails.
-
-### Death Tests And Threads
-
-The reason for the two death test styles has to do with thread safety. Due to
-well-known problems with forking in the presence of threads, death tests should
-be run in a single-threaded context. Sometimes, however, it isn't feasible to
-arrange that kind of environment. For example, statically-initialized modules
-may start threads before main is ever reached. Once threads have been created,
-it may be difficult or impossible to clean them up.
-
-googletest has three features intended to raise awareness of threading issues.
-
-1.  A warning is emitted if multiple threads are running when a death test is
-    encountered.
-2.  Test suites with a name ending in "DeathTest" are run before all other
-    tests.
-3.  It uses `clone()` instead of `fork()` to spawn the child process on Linux
-    (`clone()` is not available on Cygwin and Mac), as `fork()` is more likely
-    to cause the child to hang when the parent process has multiple threads.
-
-It's perfectly fine to create threads inside a death test statement; they are
-executed in a separate process and cannot affect the parent.
-
-### Death Test Styles
-
-The "threadsafe" death test style was introduced in order to help mitigate the
-risks of testing in a possibly multithreaded environment. It trades increased
-test execution time (potentially dramatically so) for improved thread safety.
-
-The automated testing framework does not set the style flag. You can choose a
-particular style of death tests by setting the flag programmatically:
-
-```c++
-testing::FLAGS_gtest_death_test_style="threadsafe"
-```
-
-You can do this in `main()` to set the style for all death tests in the binary,
-or in individual tests. Recall that flags are saved before running each test and
-restored afterwards, so you need not do that yourself. For example:
-
-```c++
-int main(int argc, char** argv) {
-  InitGoogle(argv[0], &argc, &argv, true);
-  ::testing::FLAGS_gtest_death_test_style = "fast";
-  return RUN_ALL_TESTS();
-}
-
-TEST(MyDeathTest, TestOne) {
-  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
-  // This test is run in the "threadsafe" style:
-  ASSERT_DEATH(ThisShouldDie(), "");
-}
-
-TEST(MyDeathTest, TestTwo) {
-  // This test is run in the "fast" style:
-  ASSERT_DEATH(ThisShouldDie(), "");
-}
-```
-
-### Caveats
-
-The `statement` argument of `ASSERT_EXIT()` can be any valid C++ statement. If
-it leaves the current function via a `return` statement or by throwing an
-exception, the death test is considered to have failed. Some googletest macros
-may return from the current function (e.g. `ASSERT_TRUE()`), so be sure to avoid
-them in `statement`.
-
-Since `statement` runs in the child process, any in-memory side effect (e.g.
-modifying a variable, releasing memory, etc) it causes will *not* be observable
-in the parent process. In particular, if you release memory in a death test,
-your program will fail the heap check as the parent process will never see the
-memory reclaimed. To solve this problem, you can
-
-1.  try not to free memory in a death test;
-2.  free the memory again in the parent process; or
-3.  do not use the heap checker in your program.
-
-Due to an implementation detail, you cannot place multiple death test assertions
-on the same line; otherwise, compilation will fail with an unobvious error
-message.
-
-Despite the improved thread safety afforded by the "threadsafe" style of death
-test, thread problems such as deadlock are still possible in the presence of
-handlers registered with `pthread_atfork(3)`.
-
-
-## Using Assertions in Sub-routines
-
-### Adding Traces to Assertions
-
-If a test sub-routine is called from several places, when an assertion inside it
-fails, it can be hard to tell which invocation of the sub-routine the failure is
-from. You can alleviate this problem using extra logging or custom failure
-messages, but that usually clutters up your tests. A better solution is to use
-the `SCOPED_TRACE` macro or the `ScopedTrace` utility:
-
-```c++
-SCOPED_TRACE(message);
-ScopedTrace trace("file_path", line_number, message);
-```
-
-where `message` can be anything streamable to `std::ostream`. `SCOPED_TRACE`
-macro will cause the current file name, line number, and the given message to be
-added in every failure message. `ScopedTrace` accepts explicit file name and
-line number in arguments, which is useful for writing test helpers. The effect
-will be undone when the control leaves the current lexical scope.
-
-For example,
-
-```c++
-10: void Sub1(int n) {
-11:   EXPECT_EQ(Bar(n), 1);
-12:   EXPECT_EQ(Bar(n + 1), 2);
-13: }
-14:
-15: TEST(FooTest, Bar) {
-16:   {
-17:     SCOPED_TRACE("A");  // This trace point will be included in
-18:                         // every failure in this scope.
-19:     Sub1(1);
-20:   }
-21:   // Now it won't.
-22:   Sub1(9);
-23: }
-```
-
-could result in messages like these:
-
-```none
-path/to/foo_test.cc:11: Failure
-Value of: Bar(n)
-Expected: 1
-  Actual: 2
-   Trace:
-path/to/foo_test.cc:17: A
-
-path/to/foo_test.cc:12: Failure
-Value of: Bar(n + 1)
-Expected: 2
-  Actual: 3
-```
-
-Without the trace, it would've been difficult to know which invocation of
-`Sub1()` the two failures come from respectively. (You could add an extra
-message to each assertion in `Sub1()` to indicate the value of `n`, but that's
-tedious.)
-
-Some tips on using `SCOPED_TRACE`:
-
-1.  With a suitable message, it's often enough to use `SCOPED_TRACE` at the
-    beginning of a sub-routine, instead of at each call site.
-2.  When calling sub-routines inside a loop, make the loop iterator part of the
-    message in `SCOPED_TRACE` such that you can know which iteration the failure
-    is from.
-3.  Sometimes the line number of the trace point is enough for identifying the
-    particular invocation of a sub-routine. In this case, you don't have to
-    choose a unique message for `SCOPED_TRACE`. You can simply use `""`.
-4.  You can use `SCOPED_TRACE` in an inner scope when there is one in the outer
-    scope. In this case, all active trace points will be included in the failure
-    messages, in reverse order they are encountered.
-5.  The trace dump is clickable in Emacs - hit `return` on a line number and
-    you'll be taken to that line in the source file!
-
-### Propagating Fatal Failures
-
-A common pitfall when using `ASSERT_*` and `FAIL*` is not understanding that
-when they fail they only abort the _current function_, not the entire test. For
-example, the following test will segfault:
-
-```c++
-void Subroutine() {
-  // Generates a fatal failure and aborts the current function.
-  ASSERT_EQ(1, 2);
-
-  // The following won't be executed.
-  ...
-}
-
-TEST(FooTest, Bar) {
-  Subroutine();  // The intended behavior is for the fatal failure
-                 // in Subroutine() to abort the entire test.
-
-  // The actual behavior: the function goes on after Subroutine() returns.
-  int* p = NULL;
-  *p = 3;  // Segfault!
-}
-```
-
-To alleviate this, googletest provides three different solutions. You could use
-either exceptions, the `(ASSERT|EXPECT)_NO_FATAL_FAILURE` assertions or the
-`HasFatalFailure()` function. They are described in the following two
-subsections.
-
-#### Asserting on Subroutines with an exception
-
-The following code can turn ASSERT-failure into an exception:
-
-```c++
-class ThrowListener : public testing::EmptyTestEventListener {
-  void OnTestPartResult(const testing::TestPartResult& result) override {
-    if (result.type() == testing::TestPartResult::kFatalFailure) {
-      throw testing::AssertionException(result);
-    }
-  }
-};
-int main(int argc, char** argv) {
-  ...
-  testing::UnitTest::GetInstance()->listeners().Append(new ThrowListener);
-  return RUN_ALL_TESTS();
-}
-```
-
-This listener should be added after other listeners if you have any, otherwise
-they won't see failed `OnTestPartResult`.
-
-#### Asserting on Subroutines
-
-As shown above, if your test calls a subroutine that has an `ASSERT_*` failure
-in it, the test will continue after the subroutine returns. This may not be what
-you want.
-
-Often people want fatal failures to propagate like exceptions. For that
-googletest offers the following macros:
-
-Fatal assertion                       | Nonfatal assertion                    | Verifies
-------------------------------------- | ------------------------------------- | --------
-`ASSERT_NO_FATAL_FAILURE(statement);` | `EXPECT_NO_FATAL_FAILURE(statement);` | `statement` doesn't generate any new fatal failures in the current thread.
-
-Only failures in the thread that executes the assertion are checked to determine
-the result of this type of assertions. If `statement` creates new threads,
-failures in these threads are ignored.
-
-Examples:
-
-```c++
-ASSERT_NO_FATAL_FAILURE(Foo());
-
-int i;
-EXPECT_NO_FATAL_FAILURE({
-  i = Bar();
-});
-```
-
-Assertions from multiple threads are currently not supported on Windows.
-
-#### Checking for Failures in the Current Test
-
-`HasFatalFailure()` in the `::testing::Test` class returns `true` if an
-assertion in the current test has suffered a fatal failure. This allows
-functions to catch fatal failures in a sub-routine and return early.
-
-```c++
-class Test {
- public:
-  ...
-  static bool HasFatalFailure();
-};
-```
-
-The typical usage, which basically simulates the behavior of a thrown exception,
-is:
-
-```c++
-TEST(FooTest, Bar) {
-  Subroutine();
-  // Aborts if Subroutine() had a fatal failure.
-  if (HasFatalFailure()) return;
-
-  // The following won't be executed.
-  ...
-}
-```
-
-If `HasFatalFailure()` is used outside of `TEST()` , `TEST_F()` , or a test
-fixture, you must add the `::testing::Test::` prefix, as in:
-
-```c++
-if (::testing::Test::HasFatalFailure()) return;
-```
-
-Similarly, `HasNonfatalFailure()` returns `true` if the current test has at
-least one non-fatal failure, and `HasFailure()` returns `true` if the current
-test has at least one failure of either kind.
-
-## Logging Additional Information
-
-In your test code, you can call `RecordProperty("key", value)` to log additional
-information, where `value` can be either a string or an `int`. The *last* value
-recorded for a key will be emitted to the
-[XML output](#generating-an-xml-report) if you specify one. For example, the
-test
-
-```c++
-TEST_F(WidgetUsageTest, MinAndMaxWidgets) {
-  RecordProperty("MaximumWidgets", ComputeMaxUsage());
-  RecordProperty("MinimumWidgets", ComputeMinUsage());
-}
-```
-
-will output XML like this:
-
-```xml
-  ...
-    <testcase name="MinAndMaxWidgets" status="run" time="0.006" classname="WidgetUsageTest" MaximumWidgets="12" MinimumWidgets="9" />
-  ...
-```
-
-> NOTE:
->
-> *   `RecordProperty()` is a static member of the `Test` class. Therefore it
->     needs to be prefixed with `::testing::Test::` if used outside of the
->     `TEST` body and the test fixture class.
-> *   `*key*` must be a valid XML attribute name, and cannot conflict with the
->     ones already used by googletest (`name`, `status`, `time`, `classname`,
->     `type_param`, and `value_param`).
-> *   Calling `RecordProperty()` outside of the lifespan of a test is allowed.
->     If it's called outside of a test but between a test suite's
->     `SetUpTestSuite()` and `TearDownTestSuite()` methods, it will be
->     attributed to the XML element for the test suite. If it's called outside
->     of all test suites (e.g. in a test environment), it will be attributed to
->     the top-level XML element.
-
-## Sharing Resources Between Tests in the Same Test Suite
-
-googletest creates a new test fixture object for each test in order to make
-tests independent and easier to debug. However, sometimes tests use resources
-that are expensive to set up, making the one-copy-per-test model prohibitively
-expensive.
-
-If the tests don't change the resource, there's no harm in their sharing a
-single resource copy. So, in addition to per-test set-up/tear-down, googletest
-also supports per-test-suite set-up/tear-down. To use it:
-
-1.  In your test fixture class (say `FooTest` ), declare as `static` some member
-    variables to hold the shared resources.
-2.  Outside your test fixture class (typically just below it), define those
-    member variables, optionally giving them initial values.
-3.  In the same test fixture class, define a `static void SetUpTestSuite()`
-    function (remember not to spell it as **`SetupTestSuite`** with a small
-    `u`!) to set up the shared resources and a `static void TearDownTestSuite()`
-    function to tear them down.
-
-That's it! googletest automatically calls `SetUpTestSuite()` before running the
-*first test* in the `FooTest` test suite (i.e. before creating the first
-`FooTest` object), and calls `TearDownTestSuite()` after running the *last test*
-in it (i.e. after deleting the last `FooTest` object). In between, the tests can
-use the shared resources.
-
-Remember that the test order is undefined, so your code can't depend on a test
-preceding or following another. Also, the tests must either not modify the state
-of any shared resource, or, if they do modify the state, they must restore the
-state to its original value before passing control to the next test.
-
-Here's an example of per-test-suite set-up and tear-down:
-
-```c++
-class FooTest : public ::testing::Test {
- protected:
-  // Per-test-suite set-up.
-  // Called before the first test in this test suite.
-  // Can be omitted if not needed.
-  static void SetUpTestSuite() {
-    shared_resource_ = new ...;
-  }
-
-  // Per-test-suite tear-down.
-  // Called after the last test in this test suite.
-  // Can be omitted if not needed.
-  static void TearDownTestSuite() {
-    delete shared_resource_;
-    shared_resource_ = NULL;
-  }
-
-  // You can define per-test set-up logic as usual.
-  virtual void SetUp() { ... }
-
-  // You can define per-test tear-down logic as usual.
-  virtual void TearDown() { ... }
-
-  // Some expensive resource shared by all tests.
-  static T* shared_resource_;
-};
-
-T* FooTest::shared_resource_ = NULL;
-
-TEST_F(FooTest, Test1) {
-  ... you can refer to shared_resource_ here ...
-}
-
-TEST_F(FooTest, Test2) {
-  ... you can refer to shared_resource_ here ...
-}
-```
-
-NOTE: Though the above code declares `SetUpTestSuite()` protected, it may
-sometimes be necessary to declare it public, such as when using it with
-`TEST_P`.
-
-## Global Set-Up and Tear-Down
-
-Just as you can do set-up and tear-down at the test level and the test suite
-level, you can also do it at the test program level. Here's how.
-
-First, you subclass the `::testing::Environment` class to define a test
-environment, which knows how to set-up and tear-down:
-
-```c++
-class Environment : public ::testing::Environment {
- public:
-  virtual ~Environment() {}
-
-  // Override this to define how to set up the environment.
-  void SetUp() override {}
-
-  // Override this to define how to tear down the environment.
-  void TearDown() override {}
-};
-```
-
-Then, you register an instance of your environment class with googletest by
-calling the `::testing::AddGlobalTestEnvironment()` function:
-
-```c++
-Environment* AddGlobalTestEnvironment(Environment* env);
-```
-
-Now, when `RUN_ALL_TESTS()` is called, it first calls the `SetUp()` method of
-each environment object, then runs the tests if none of the environments
-reported fatal failures and `GTEST_SKIP()` was not called. `RUN_ALL_TESTS()`
-always calls `TearDown()` with each environment object, regardless of whether or
-not the tests were run.
-
-It's OK to register multiple environment objects. In this suite, their `SetUp()`
-will be called in the order they are registered, and their `TearDown()` will be
-called in the reverse order.
-
-Note that googletest takes ownership of the registered environment objects.
-Therefore **do not delete them** by yourself.
-
-You should call `AddGlobalTestEnvironment()` before `RUN_ALL_TESTS()` is called,
-probably in `main()`. If you use `gtest_main`, you need to call this before
-`main()` starts for it to take effect. One way to do this is to define a global
-variable like this:
-
-```c++
-::testing::Environment* const foo_env =
-    ::testing::AddGlobalTestEnvironment(new FooEnvironment);
-```
-
-However, we strongly recommend you to write your own `main()` and call
-`AddGlobalTestEnvironment()` there, as relying on initialization of global
-variables makes the code harder to read and may cause problems when you register
-multiple environments from different translation units and the environments have
-dependencies among them (remember that the compiler doesn't guarantee the order
-in which global variables from different translation units are initialized).
-
-## Value-Parameterized Tests
-
-*Value-parameterized tests* allow you to test your code with different
-parameters without writing multiple copies of the same test. This is useful in a
-number of situations, for example:
-
-*   You have a piece of code whose behavior is affected by one or more
-    command-line flags. You want to make sure your code performs correctly for
-    various values of those flags.
-*   You want to test different implementations of an OO interface.
-*   You want to test your code over various inputs (a.k.a. data-driven testing).
-    This feature is easy to abuse, so please exercise your good sense when doing
-    it!
-
-### How to Write Value-Parameterized Tests
-
-To write value-parameterized tests, first you should define a fixture class. It
-must be derived from both `testing::Test` and `testing::WithParamInterface<T>`
-(the latter is a pure interface), where `T` is the type of your parameter
-values. For convenience, you can just derive the fixture class from
-`testing::TestWithParam<T>`, which itself is derived from both `testing::Test`
-and `testing::WithParamInterface<T>`. `T` can be any copyable type. If it's a
-raw pointer, you are responsible for managing the lifespan of the pointed
-values.
-
-NOTE: If your test fixture defines `SetUpTestSuite()` or `TearDownTestSuite()`
-they must be declared **public** rather than **protected** in order to use
-`TEST_P`.
-
-```c++
-class FooTest :
-    public testing::TestWithParam<const char*> {
-  // You can implement all the usual fixture class members here.
-  // To access the test parameter, call GetParam() from class
-  // TestWithParam<T>.
-};
-
-// Or, when you want to add parameters to a pre-existing fixture class:
-class BaseTest : public testing::Test {
-  ...
-};
-class BarTest : public BaseTest,
-                public testing::WithParamInterface<const char*> {
-  ...
-};
-```
-
-Then, use the `TEST_P` macro to define as many test patterns using this fixture
-as you want. The `_P` suffix is for "parameterized" or "pattern", whichever you
-prefer to think.
-
-```c++
-TEST_P(FooTest, DoesBlah) {
-  // Inside a test, access the test parameter with the GetParam() method
-  // of the TestWithParam<T> class:
-  EXPECT_TRUE(foo.Blah(GetParam()));
-  ...
-}
-
-TEST_P(FooTest, HasBlahBlah) {
-  ...
-}
-```
-
-Finally, you can use `INSTANTIATE_TEST_SUITE_P` to instantiate the test suite
-with any set of parameters you want. googletest defines a number of functions
-for generating test parameters. They return what we call (surprise!) *parameter
-generators*. Here is a summary of them, which are all in the `testing`
-namespace:
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-| Parameter Generator                                                                       | Behavior                                                                                                          |
-| ----------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------- |
-| `Range(begin, end [, step])`                                                              | Yields values `{begin, begin+step, begin+step+step, ...}`. The values do not include `end`. `step` defaults to 1. |
-| `Values(v1, v2, ..., vN)`                                                                 | Yields values `{v1, v2, ..., vN}`.                                                                                |
-| `ValuesIn(container)` and  `ValuesIn(begin,end)`                                          | Yields values from a C-style array, an  STL-style container, or an iterator range `[begin, end)`                  |
-| `Bool()`                                                                                  | Yields sequence `{false, true}`.                                                                                  |
-| `Combine(g1, g2, ..., gN)`                                                                | Yields all combinations (Cartesian product) as std\:\:tuples of the values generated by the `N` generators.       |
-
-<!-- mdformat on-->
-
-For more details, see the comments at the definitions of these functions.
-
-The following statement will instantiate tests from the `FooTest` test suite
-each with parameter values `"meeny"`, `"miny"`, and `"moe"`.
-
-```c++
-INSTANTIATE_TEST_SUITE_P(InstantiationName,
-                         FooTest,
-                         testing::Values("meeny", "miny", "moe"));
-```
-
-NOTE: The code above must be placed at global or namespace scope, not at
-function scope.
-
-NOTE: Don't forget this step! If you do your test will silently pass, but none
-of its suites will ever run!
-
-To distinguish different instances of the pattern (yes, you can instantiate it
-more than once), the first argument to `INSTANTIATE_TEST_SUITE_P` is a prefix
-that will be added to the actual test suite name. Remember to pick unique
-prefixes for different instantiations. The tests from the instantiation above
-will have these names:
-
-*   `InstantiationName/FooTest.DoesBlah/0` for `"meeny"`
-*   `InstantiationName/FooTest.DoesBlah/1` for `"miny"`
-*   `InstantiationName/FooTest.DoesBlah/2` for `"moe"`
-*   `InstantiationName/FooTest.HasBlahBlah/0` for `"meeny"`
-*   `InstantiationName/FooTest.HasBlahBlah/1` for `"miny"`
-*   `InstantiationName/FooTest.HasBlahBlah/2` for `"moe"`
-
-You can use these names in [`--gtest_filter`](#running-a-subset-of-the-tests).
-
-This statement will instantiate all tests from `FooTest` again, each with
-parameter values `"cat"` and `"dog"`:
-
-```c++
-const char* pets[] = {"cat", "dog"};
-INSTANTIATE_TEST_SUITE_P(AnotherInstantiationName, FooTest,
-                         testing::ValuesIn(pets));
-```
-
-The tests from the instantiation above will have these names:
-
-*   `AnotherInstantiationName/FooTest.DoesBlah/0` for `"cat"`
-*   `AnotherInstantiationName/FooTest.DoesBlah/1` for `"dog"`
-*   `AnotherInstantiationName/FooTest.HasBlahBlah/0` for `"cat"`
-*   `AnotherInstantiationName/FooTest.HasBlahBlah/1` for `"dog"`
-
-Please note that `INSTANTIATE_TEST_SUITE_P` will instantiate *all* tests in the
-given test suite, whether their definitions come before or *after* the
-`INSTANTIATE_TEST_SUITE_P` statement.
-
-You can see [sample7_unittest.cc] and [sample8_unittest.cc] for more examples.
-
-[sample7_unittest.cc]: ../samples/sample7_unittest.cc "Parameterized Test example"
-[sample8_unittest.cc]: ../samples/sample8_unittest.cc "Parameterized Test example with multiple parameters"
-
-### Creating Value-Parameterized Abstract Tests
-
-In the above, we define and instantiate `FooTest` in the *same* source file.
-Sometimes you may want to define value-parameterized tests in a library and let
-other people instantiate them later. This pattern is known as *abstract tests*.
-As an example of its application, when you are designing an interface you can
-write a standard suite of abstract tests (perhaps using a factory function as
-the test parameter) that all implementations of the interface are expected to
-pass. When someone implements the interface, they can instantiate your suite to
-get all the interface-conformance tests for free.
-
-To define abstract tests, you should organize your code like this:
-
-1.  Put the definition of the parameterized test fixture class (e.g. `FooTest`)
-    in a header file, say `foo_param_test.h`. Think of this as *declaring* your
-    abstract tests.
-2.  Put the `TEST_P` definitions in `foo_param_test.cc`, which includes
-    `foo_param_test.h`. Think of this as *implementing* your abstract tests.
-
-Once they are defined, you can instantiate them by including `foo_param_test.h`,
-invoking `INSTANTIATE_TEST_SUITE_P()`, and depending on the library target that
-contains `foo_param_test.cc`. You can instantiate the same abstract test suite
-multiple times, possibly in different source files.
-
-### Specifying Names for Value-Parameterized Test Parameters
-
-The optional last argument to `INSTANTIATE_TEST_SUITE_P()` allows the user to
-specify a function or functor that generates custom test name suffixes based on
-the test parameters. The function should accept one argument of type
-`testing::TestParamInfo<class ParamType>`, and return `std::string`.
-
-`testing::PrintToStringParamName` is a builtin test suffix generator that
-returns the value of `testing::PrintToString(GetParam())`. It does not work for
-`std::string` or C strings.
-
-NOTE: test names must be non-empty, unique, and may only contain ASCII
-alphanumeric characters. In particular, they
-[should not contain underscores](faq.md#why-should-test-suite-names-and-test-names-not-contain-underscore)
-
-```c++
-class MyTestSuite : public testing::TestWithParam<int> {};
-
-TEST_P(MyTestSuite, MyTest)
-{
-  std::cout << "Example Test Param: " << GetParam() << std::endl;
-}
-
-INSTANTIATE_TEST_SUITE_P(MyGroup, MyTestSuite, testing::Range(0, 10),
-                         testing::PrintToStringParamName());
-```
-
-Providing a custom functor allows for more control over test parameter name
-generation, especially for types where the automatic conversion does not
-generate helpful parameter names (e.g. strings as demonstrated above). The
-following example illustrates this for multiple parameters, an enumeration type
-and a string, and also demonstrates how to combine generators. It uses a lambda
-for conciseness:
-
-```c++
-enum class MyType { MY_FOO = 0, MY_BAR = 1 };
-
-class MyTestSuite : public testing::TestWithParam<std::tuple<MyType, string>> {
-};
-
-INSTANTIATE_TEST_SUITE_P(
-    MyGroup, MyTestSuite,
-    testing::Combine(
-        testing::Values(MyType::VALUE_0, MyType::VALUE_1),
-        testing::ValuesIn("", "")),
-    [](const testing::TestParamInfo<MyTestSuite::ParamType>& info) {
-      string name = absl::StrCat(
-          std::get<0>(info.param) == MY_FOO ? "Foo" : "Bar", "_",
-          std::get<1>(info.param));
-      absl::c_replace_if(name, [](char c) { return !std::isalnum(c); }, '_');
-      return name;
-    });
-```
-
-## Typed Tests
-
-Suppose you have multiple implementations of the same interface and want to make
-sure that all of them satisfy some common requirements. Or, you may have defined
-several types that are supposed to conform to the same "concept" and you want to
-verify it. In both cases, you want the same test logic repeated for different
-types.
-
-While you can write one `TEST` or `TEST_F` for each type you want to test (and
-you may even factor the test logic into a function template that you invoke from
-the `TEST`), it's tedious and doesn't scale: if you want `m` tests over `n`
-types, you'll end up writing `m*n` `TEST`s.
-
-*Typed tests* allow you to repeat the same test logic over a list of types. You
-only need to write the test logic once, although you must know the type list
-when writing typed tests. Here's how you do it:
-
-First, define a fixture class template. It should be parameterized by a type.
-Remember to derive it from `::testing::Test`:
-
-```c++
-template <typename T>
-class FooTest : public ::testing::Test {
- public:
-  ...
-  typedef std::list<T> List;
-  static T shared_;
-  T value_;
-};
-```
-
-Next, associate a list of types with the test suite, which will be repeated for
-each type in the list:
-
-```c++
-using MyTypes = ::testing::Types<char, int, unsigned int>;
-TYPED_TEST_SUITE(FooTest, MyTypes);
-```
-
-The type alias (`using` or `typedef`) is necessary for the `TYPED_TEST_SUITE`
-macro to parse correctly. Otherwise the compiler will think that each comma in
-the type list introduces a new macro argument.
-
-Then, use `TYPED_TEST()` instead of `TEST_F()` to define a typed test for this
-test suite. You can repeat this as many times as you want:
-
-```c++
-TYPED_TEST(FooTest, DoesBlah) {
-  // Inside a test, refer to the special name TypeParam to get the type
-  // parameter.  Since we are inside a derived class template, C++ requires
-  // us to visit the members of FooTest via 'this'.
-  TypeParam n = this->value_;
-
-  // To visit static members of the fixture, add the 'TestFixture::'
-  // prefix.
-  n += TestFixture::shared_;
-
-  // To refer to typedefs in the fixture, add the 'typename TestFixture::'
-  // prefix.  The 'typename' is required to satisfy the compiler.
-  typename TestFixture::List values;
-
-  values.push_back(n);
-  ...
-}
-
-TYPED_TEST(FooTest, HasPropertyA) { ... }
-```
-
-You can see [sample6_unittest.cc] for a complete example.
-
-[sample6_unittest.cc]: ../samples/sample6_unittest.cc "Typed Test example"
-
-## Type-Parameterized Tests
-
-*Type-parameterized tests* are like typed tests, except that they don't require
-you to know the list of types ahead of time. Instead, you can define the test
-logic first and instantiate it with different type lists later. You can even
-instantiate it more than once in the same program.
-
-If you are designing an interface or concept, you can define a suite of
-type-parameterized tests to verify properties that any valid implementation of
-the interface/concept should have. Then, the author of each implementation can
-just instantiate the test suite with their type to verify that it conforms to
-the requirements, without having to write similar tests repeatedly. Here's an
-example:
-
-First, define a fixture class template, as we did with typed tests:
-
-```c++
-template <typename T>
-class FooTest : public ::testing::Test {
-  ...
-};
-```
-
-Next, declare that you will define a type-parameterized test suite:
-
-```c++
-TYPED_TEST_SUITE_P(FooTest);
-```
-
-Then, use `TYPED_TEST_P()` to define a type-parameterized test. You can repeat
-this as many times as you want:
-
-```c++
-TYPED_TEST_P(FooTest, DoesBlah) {
-  // Inside a test, refer to TypeParam to get the type parameter.
-  TypeParam n = 0;
-  ...
-}
-
-TYPED_TEST_P(FooTest, HasPropertyA) { ... }
-```
-
-Now the tricky part: you need to register all test patterns using the
-`REGISTER_TYPED_TEST_SUITE_P` macro before you can instantiate them. The first
-argument of the macro is the test suite name; the rest are the names of the
-tests in this test suite:
-
-```c++
-REGISTER_TYPED_TEST_SUITE_P(FooTest,
-                            DoesBlah, HasPropertyA);
-```
-
-Finally, you are free to instantiate the pattern with the types you want. If you
-put the above code in a header file, you can `#include` it in multiple C++
-source files and instantiate it multiple times.
-
-```c++
-typedef ::testing::Types<char, int, unsigned int> MyTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes);
-```
-
-To distinguish different instances of the pattern, the first argument to the
-`INSTANTIATE_TYPED_TEST_SUITE_P` macro is a prefix that will be added to the
-actual test suite name. Remember to pick unique prefixes for different
-instances.
-
-In the special case where the type list contains only one type, you can write
-that type directly without `::testing::Types<...>`, like this:
-
-```c++
-INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, int);
-```
-
-You can see [sample6_unittest.cc] for a complete example.
-
-## Testing Private Code
-
-If you change your software's internal implementation, your tests should not
-break as long as the change is not observable by users. Therefore, **per the
-black-box testing principle, most of the time you should test your code through
-its public interfaces.**
-
-**If you still find yourself needing to test internal implementation code,
-consider if there's a better design.** The desire to test internal
-implementation is often a sign that the class is doing too much. Consider
-extracting an implementation class, and testing it. Then use that implementation
-class in the original class.
-
-If you absolutely have to test non-public interface code though, you can. There
-are two cases to consider:
-
-*   Static functions ( *not* the same as static member functions!) or unnamed
-    namespaces, and
-*   Private or protected class members
-
-To test them, we use the following special techniques:
-
-*   Both static functions and definitions/declarations in an unnamed namespace
-    are only visible within the same translation unit. To test them, you can
-    `#include` the entire `.cc` file being tested in your `*_test.cc` file.
-    (#including `.cc` files is not a good way to reuse code - you should not do
-    this in production code!)
-
-    However, a better approach is to move the private code into the
-    `foo::internal` namespace, where `foo` is the namespace your project
-    normally uses, and put the private declarations in a `*-internal.h` file.
-    Your production `.cc` files and your tests are allowed to include this
-    internal header, but your clients are not. This way, you can fully test your
-    internal implementation without leaking it to your clients.
-
-*   Private class members are only accessible from within the class or by
-    friends. To access a class' private members, you can declare your test
-    fixture as a friend to the class and define accessors in your fixture. Tests
-    using the fixture can then access the private members of your production
-    class via the accessors in the fixture. Note that even though your fixture
-    is a friend to your production class, your tests are not automatically
-    friends to it, as they are technically defined in sub-classes of the
-    fixture.
-
-    Another way to test private members is to refactor them into an
-    implementation class, which is then declared in a `*-internal.h` file. Your
-    clients aren't allowed to include this header but your tests can. Such is
-    called the
-    [Pimpl](https://www.gamedev.net/articles/programming/general-and-gameplay-programming/the-c-pimpl-r1794/)
-    (Private Implementation) idiom.
-
-    Or, you can declare an individual test as a friend of your class by adding
-    this line in the class body:
-
-    ```c++
-        FRIEND_TEST(TestSuiteName, TestName);
-    ```
-
-    For example,
-
-    ```c++
-    // foo.h
-    class Foo {
-      ...
-     private:
-      FRIEND_TEST(FooTest, BarReturnsZeroOnNull);
-
-      int Bar(void* x);
-    };
-
-    // foo_test.cc
-    ...
-    TEST(FooTest, BarReturnsZeroOnNull) {
-      Foo foo;
-      EXPECT_EQ(foo.Bar(NULL), 0);  // Uses Foo's private member Bar().
-    }
-    ```
-
-    Pay special attention when your class is defined in a namespace, as you
-    should define your test fixtures and tests in the same namespace if you want
-    them to be friends of your class. For example, if the code to be tested
-    looks like:
-
-    ```c++
-    namespace my_namespace {
-
-    class Foo {
-      friend class FooTest;
-      FRIEND_TEST(FooTest, Bar);
-      FRIEND_TEST(FooTest, Baz);
-      ... definition of the class Foo ...
-    };
-
-    }  // namespace my_namespace
-    ```
-
-    Your test code should be something like:
-
-    ```c++
-    namespace my_namespace {
-
-    class FooTest : public ::testing::Test {
-     protected:
-      ...
-    };
-
-    TEST_F(FooTest, Bar) { ... }
-    TEST_F(FooTest, Baz) { ... }
-
-    }  // namespace my_namespace
-    ```
-
-## "Catching" Failures
-
-If you are building a testing utility on top of googletest, you'll want to test
-your utility. What framework would you use to test it? googletest, of course.
-
-The challenge is to verify that your testing utility reports failures correctly.
-In frameworks that report a failure by throwing an exception, you could catch
-the exception and assert on it. But googletest doesn't use exceptions, so how do
-we test that a piece of code generates an expected failure?
-
-gunit-spi.h contains some constructs to do this. After #including this header,
-you can use
-
-```c++
-  EXPECT_FATAL_FAILURE(statement, substring);
-```
-
-to assert that `statement` generates a fatal (e.g. `ASSERT_*`) failure in the
-current thread whose message contains the given `substring`, or use
-
-```c++
-  EXPECT_NONFATAL_FAILURE(statement, substring);
-```
-
-if you are expecting a non-fatal (e.g. `EXPECT_*`) failure.
-
-Only failures in the current thread are checked to determine the result of this
-type of expectations. If `statement` creates new threads, failures in these
-threads are also ignored. If you want to catch failures in other threads as
-well, use one of the following macros instead:
-
-```c++
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(statement, substring);
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(statement, substring);
-```
-
-NOTE: Assertions from multiple threads are currently not supported on Windows.
-
-For technical reasons, there are some caveats:
-
-1.  You cannot stream a failure message to either macro.
-
-2.  `statement` in `EXPECT_FATAL_FAILURE{_ON_ALL_THREADS}()` cannot reference
-    local non-static variables or non-static members of `this` object.
-
-3.  `statement` in `EXPECT_FATAL_FAILURE{_ON_ALL_THREADS}()` cannot return a
-    value.
-
-## Registering tests programmatically
-
-The `TEST` macros handle the vast majority of all use cases, but there are few
-were runtime registration logic is required. For those cases, the framework
-provides the `::testing::RegisterTest` that allows callers to register arbitrary
-tests dynamically.
-
-This is an advanced API only to be used when the `TEST` macros are insufficient.
-The macros should be preferred when possible, as they avoid most of the
-complexity of calling this function.
-
-It provides the following signature:
-
-```c++
-template <typename Factory>
-TestInfo* RegisterTest(const char* test_suite_name, const char* test_name,
-                       const char* type_param, const char* value_param,
-                       const char* file, int line, Factory factory);
-```
-
-The `factory` argument is a factory callable (move-constructible) object or
-function pointer that creates a new instance of the Test object. It handles
-ownership to the caller. The signature of the callable is `Fixture*()`, where
-`Fixture` is the test fixture class for the test. All tests registered with the
-same `test_suite_name` must return the same fixture type. This is checked at
-runtime.
-
-The framework will infer the fixture class from the factory and will call the
-`SetUpTestSuite` and `TearDownTestSuite` for it.
-
-Must be called before `RUN_ALL_TESTS()` is invoked, otherwise behavior is
-undefined.
-
-Use case example:
-
-```c++
-class MyFixture : public ::testing::Test {
- public:
-  // All of these optional, just like in regular macro usage.
-  static void SetUpTestSuite() { ... }
-  static void TearDownTestSuite() { ... }
-  void SetUp() override { ... }
-  void TearDown() override { ... }
-};
-
-class MyTest : public MyFixture {
- public:
-  explicit MyTest(int data) : data_(data) {}
-  void TestBody() override { ... }
-
- private:
-  int data_;
-};
-
-void RegisterMyTests(const std::vector<int>& values) {
-  for (int v : values) {
-    ::testing::RegisterTest(
-        "MyFixture", ("Test" + std::to_string(v)).c_str(), nullptr,
-        std::to_string(v).c_str(),
-        __FILE__, __LINE__,
-        // Important to use the fixture type as the return type here.
-        [=]() -> MyFixture* { return new MyTest(v); });
-  }
-}
-...
-int main(int argc, char** argv) {
-  std::vector<int> values_to_test = LoadValuesFromConfig();
-  RegisterMyTests(values_to_test);
-  ...
-  return RUN_ALL_TESTS();
-}
-```
-## Getting the Current Test's Name
-
-Sometimes a function may need to know the name of the currently running test.
-For example, you may be using the `SetUp()` method of your test fixture to set
-the golden file name based on which test is running. The `::testing::TestInfo`
-class has this information:
-
-```c++
-namespace testing {
-
-class TestInfo {
- public:
-  // Returns the test suite name and the test name, respectively.
-  //
-  // Do NOT delete or free the return value - it's managed by the
-  // TestInfo class.
-  const char* test_suite_name() const;
-  const char* name() const;
-};
-
-}
-```
-
-To obtain a `TestInfo` object for the currently running test, call
-`current_test_info()` on the `UnitTest` singleton object:
-
-```c++
-  // Gets information about the currently running test.
-  // Do NOT delete the returned object - it's managed by the UnitTest class.
-  const ::testing::TestInfo* const test_info =
-    ::testing::UnitTest::GetInstance()->current_test_info();
-
-
-
-  printf("We are in test %s of test suite %s.\n",
-         test_info->name(),
-         test_info->test_suite_name());
-```
-
-`current_test_info()` returns a null pointer if no test is running. In
-particular, you cannot find the test suite name in `TestSuiteSetUp()`,
-`TestSuiteTearDown()` (where you know the test suite name implicitly), or
-functions called from them.
-
-## Extending googletest by Handling Test Events
-
-googletest provides an **event listener API** to let you receive notifications
-about the progress of a test program and test failures. The events you can
-listen to include the start and end of the test program, a test suite, or a test
-method, among others. You may use this API to augment or replace the standard
-console output, replace the XML output, or provide a completely different form
-of output, such as a GUI or a database. You can also use test events as
-checkpoints to implement a resource leak checker, for example.
-
-### Defining Event Listeners
-
-To define a event listener, you subclass either testing::TestEventListener or
-testing::EmptyTestEventListener The former is an (abstract) interface, where
-*each pure virtual method can be overridden to handle a test event* (For
-example, when a test starts, the `OnTestStart()` method will be called.). The
-latter provides an empty implementation of all methods in the interface, such
-that a subclass only needs to override the methods it cares about.
-
-When an event is fired, its context is passed to the handler function as an
-argument. The following argument types are used:
-
-*   UnitTest reflects the state of the entire test program,
-*   TestSuite has information about a test suite, which can contain one or more
-    tests,
-*   TestInfo contains the state of a test, and
-*   TestPartResult represents the result of a test assertion.
-
-An event handler function can examine the argument it receives to find out
-interesting information about the event and the test program's state.
-
-Here's an example:
-
-```c++
-  class MinimalistPrinter : public ::testing::EmptyTestEventListener {
-    // Called before a test starts.
-    virtual void OnTestStart(const ::testing::TestInfo& test_info) {
-      printf("*** Test %s.%s starting.\n",
-             test_info.test_suite_name(), test_info.name());
-    }
-
-    // Called after a failed assertion or a SUCCESS().
-    virtual void OnTestPartResult(const ::testing::TestPartResult& test_part_result) {
-      printf("%s in %s:%d\n%s\n",
-             test_part_result.failed() ? "*** Failure" : "Success",
-             test_part_result.file_name(),
-             test_part_result.line_number(),
-             test_part_result.summary());
-    }
-
-    // Called after a test ends.
-    virtual void OnTestEnd(const ::testing::TestInfo& test_info) {
-      printf("*** Test %s.%s ending.\n",
-             test_info.test_suite_name(), test_info.name());
-    }
-  };
-```
-
-### Using Event Listeners
-
-To use the event listener you have defined, add an instance of it to the
-googletest event listener list (represented by class TestEventListeners - note
-the "s" at the end of the name) in your `main()` function, before calling
-`RUN_ALL_TESTS()`:
-
-```c++
-int main(int argc, char** argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-  // Gets hold of the event listener list.
-  ::testing::TestEventListeners& listeners =
-        ::testing::UnitTest::GetInstance()->listeners();
-  // Adds a listener to the end.  googletest takes the ownership.
-  listeners.Append(new MinimalistPrinter);
-  return RUN_ALL_TESTS();
-}
-```
-
-There's only one problem: the default test result printer is still in effect, so
-its output will mingle with the output from your minimalist printer. To suppress
-the default printer, just release it from the event listener list and delete it.
-You can do so by adding one line:
-
-```c++
-  ...
-  delete listeners.Release(listeners.default_result_printer());
-  listeners.Append(new MinimalistPrinter);
-  return RUN_ALL_TESTS();
-```
-
-Now, sit back and enjoy a completely different output from your tests. For more
-details, see [sample9_unittest.cc].
-
-[sample9_unittest.cc]: ../samples/sample9_unittest.cc "Event listener example"
-
-You may append more than one listener to the list. When an `On*Start()` or
-`OnTestPartResult()` event is fired, the listeners will receive it in the order
-they appear in the list (since new listeners are added to the end of the list,
-the default text printer and the default XML generator will receive the event
-first). An `On*End()` event will be received by the listeners in the *reverse*
-order. This allows output by listeners added later to be framed by output from
-listeners added earlier.
-
-### Generating Failures in Listeners
-
-You may use failure-raising macros (`EXPECT_*()`, `ASSERT_*()`, `FAIL()`, etc)
-when processing an event. There are some restrictions:
-
-1.  You cannot generate any failure in `OnTestPartResult()` (otherwise it will
-    cause `OnTestPartResult()` to be called recursively).
-2.  A listener that handles `OnTestPartResult()` is not allowed to generate any
-    failure.
-
-When you add listeners to the listener list, you should put listeners that
-handle `OnTestPartResult()` *before* listeners that can generate failures. This
-ensures that failures generated by the latter are attributed to the right test
-by the former.
-
-See [sample10_unittest.cc] for an example of a failure-raising listener.
-
-[sample10_unittest.cc]: ../samples/sample10_unittest.cc "Failure-raising listener example"
-
-## Running Test Programs: Advanced Options
-
-googletest test programs are ordinary executables. Once built, you can run them
-directly and affect their behavior via the following environment variables
-and/or command line flags. For the flags to work, your programs must call
-`::testing::InitGoogleTest()` before calling `RUN_ALL_TESTS()`.
-
-To see a list of supported flags and their usage, please run your test program
-with the `--help` flag. You can also use `-h`, `-?`, or `/?` for short.
-
-If an option is specified both by an environment variable and by a flag, the
-latter takes precedence.
-
-### Selecting Tests
-
-#### Listing Test Names
-
-Sometimes it is necessary to list the available tests in a program before
-running them so that a filter may be applied if needed. Including the flag
-`--gtest_list_tests` overrides all other flags and lists tests in the following
-format:
-
-```none
-TestSuite1.
-  TestName1
-  TestName2
-TestSuite2.
-  TestName
-```
-
-None of the tests listed are actually run if the flag is provided. There is no
-corresponding environment variable for this flag.
-
-#### Running a Subset of the Tests
-
-By default, a googletest program runs all tests the user has defined. Sometimes,
-you want to run only a subset of the tests (e.g. for debugging or quickly
-verifying a change). If you set the `GTEST_FILTER` environment variable or the
-`--gtest_filter` flag to a filter string, googletest will only run the tests
-whose full names (in the form of `TestSuiteName.TestName`) match the filter.
-
-The format of a filter is a '`:`'-separated list of wildcard patterns (called
-the *positive patterns*) optionally followed by a '`-`' and another
-'`:`'-separated pattern list (called the *negative patterns*). A test matches
-the filter if and only if it matches any of the positive patterns but does not
-match any of the negative patterns.
-
-A pattern may contain `'*'` (matches any string) or `'?'` (matches any single
-character). For convenience, the filter `'*-NegativePatterns'` can be also
-written as `'-NegativePatterns'`.
-
-For example:
-
-*   `./foo_test` Has no flag, and thus runs all its tests.
-*   `./foo_test --gtest_filter=*` Also runs everything, due to the single
-    match-everything `*` value.
-*   `./foo_test --gtest_filter=FooTest.*` Runs everything in test suite
-    `FooTest` .
-*   `./foo_test --gtest_filter=*Null*:*Constructor*` Runs any test whose full
-    name contains either `"Null"` or `"Constructor"` .
-*   `./foo_test --gtest_filter=-*DeathTest.*` Runs all non-death tests.
-*   `./foo_test --gtest_filter=FooTest.*-FooTest.Bar` Runs everything in test
-    suite `FooTest` except `FooTest.Bar`.
-*   `./foo_test --gtest_filter=FooTest.*:BarTest.*-FooTest.Bar:BarTest.Foo` Runs
-    everything in test suite `FooTest` except `FooTest.Bar` and everything in
-    test suite `BarTest` except `BarTest.Foo`.
-
-#### Temporarily Disabling Tests
-
-If you have a broken test that you cannot fix right away, you can add the
-`DISABLED_` prefix to its name. This will exclude it from execution. This is
-better than commenting out the code or using `#if 0`, as disabled tests are
-still compiled (and thus won't rot).
-
-If you need to disable all tests in a test suite, you can either add `DISABLED_`
-to the front of the name of each test, or alternatively add it to the front of
-the test suite name.
-
-For example, the following tests won't be run by googletest, even though they
-will still be compiled:
-
-```c++
-// Tests that Foo does Abc.
-TEST(FooTest, DISABLED_DoesAbc) { ... }
-
-class DISABLED_BarTest : public ::testing::Test { ... };
-
-// Tests that Bar does Xyz.
-TEST_F(DISABLED_BarTest, DoesXyz) { ... }
-```
-
-NOTE: This feature should only be used for temporary pain-relief. You still have
-to fix the disabled tests at a later date. As a reminder, googletest will print
-a banner warning you if a test program contains any disabled tests.
-
-TIP: You can easily count the number of disabled tests you have using `gsearch`
-and/or `grep`. This number can be used as a metric for improving your test
-quality.
-
-#### Temporarily Enabling Disabled Tests
-
-To include disabled tests in test execution, just invoke the test program with
-the `--gtest_also_run_disabled_tests` flag or set the
-`GTEST_ALSO_RUN_DISABLED_TESTS` environment variable to a value other than `0`.
-You can combine this with the `--gtest_filter` flag to further select which
-disabled tests to run.
-
-### Repeating the Tests
-
-Once in a while you'll run into a test whose result is hit-or-miss. Perhaps it
-will fail only 1% of the time, making it rather hard to reproduce the bug under
-a debugger. This can be a major source of frustration.
-
-The `--gtest_repeat` flag allows you to repeat all (or selected) test methods in
-a program many times. Hopefully, a flaky test will eventually fail and give you
-a chance to debug. Here's how to use it:
-
-```none
-$ foo_test --gtest_repeat=1000
-Repeat foo_test 1000 times and don't stop at failures.
-
-$ foo_test --gtest_repeat=-1
-A negative count means repeating forever.
-
-$ foo_test --gtest_repeat=1000 --gtest_break_on_failure
-Repeat foo_test 1000 times, stopping at the first failure.  This
-is especially useful when running under a debugger: when the test
-fails, it will drop into the debugger and you can then inspect
-variables and stacks.
-
-$ foo_test --gtest_repeat=1000 --gtest_filter=FooBar.*
-Repeat the tests whose name matches the filter 1000 times.
-```
-
-If your test program contains
-[global set-up/tear-down](#global-set-up-and-tear-down) code, it will be
-repeated in each iteration as well, as the flakiness may be in it. You can also
-specify the repeat count by setting the `GTEST_REPEAT` environment variable.
-
-### Shuffling the Tests
-
-You can specify the `--gtest_shuffle` flag (or set the `GTEST_SHUFFLE`
-environment variable to `1`) to run the tests in a program in a random order.
-This helps to reveal bad dependencies between tests.
-
-By default, googletest uses a random seed calculated from the current time.
-Therefore you'll get a different order every time. The console output includes
-the random seed value, such that you can reproduce an order-related test failure
-later. To specify the random seed explicitly, use the `--gtest_random_seed=SEED`
-flag (or set the `GTEST_RANDOM_SEED` environment variable), where `SEED` is an
-integer in the range [0, 99999]. The seed value 0 is special: it tells
-googletest to do the default behavior of calculating the seed from the current
-time.
-
-If you combine this with `--gtest_repeat=N`, googletest will pick a different
-random seed and re-shuffle the tests in each iteration.
-
-### Controlling Test Output
-
-#### Colored Terminal Output
-
-googletest can use colors in its terminal output to make it easier to spot the
-important information:
-
-<code>
-...<br/>
-  <font color="green">[----------]</font><font color="black"> 1 test from
-  FooTest</font><br/>
-  <font color="green">[ RUN &nbsp; &nbsp; &nbsp;]</font><font color="black">
-  FooTest.DoesAbc</font><br/>
-  <font color="green">[ &nbsp; &nbsp; &nbsp; OK ]</font><font color="black">
-  FooTest.DoesAbc </font><br/>
-  <font color="green">[----------]</font><font color="black">
-  2 tests from BarTest</font><br/>
-  <font color="green">[ RUN &nbsp; &nbsp; &nbsp;]</font><font color="black">
-  BarTest.HasXyzProperty </font><br/>
-  <font color="green">[ &nbsp; &nbsp; &nbsp; OK ]</font><font color="black">
-  BarTest.HasXyzProperty</font><br/>
-  <font color="green">[ RUN &nbsp; &nbsp; &nbsp;]</font><font color="black">
-  BarTest.ReturnsTrueOnSuccess ... some error messages ...</font><br/>
-  <font color="red">[ &nbsp; FAILED ]</font><font color="black">
-  BarTest.ReturnsTrueOnSuccess ...</font><br/>
-  <font color="green">[==========]</font><font color="black">
-  30 tests from 14 test suites ran.</font><br/>
-  <font color="green">[ &nbsp; PASSED ]</font><font color="black">
-  28 tests.</font><br/>
-  <font color="red">[ &nbsp; FAILED ]</font><font color="black">
-  2 tests, listed below:</font><br/>
-  <font color="red">[ &nbsp; FAILED ]</font><font color="black">
-  BarTest.ReturnsTrueOnSuccess</font><br/>
-  <font color="red">[ &nbsp; FAILED ]</font><font color="black">
-  AnotherTest.DoesXyz<br/>
-<br/>
-  2 FAILED TESTS
-  </font>
-</code>
-
-You can set the `GTEST_COLOR` environment variable or the `--gtest_color`
-command line flag to `yes`, `no`, or `auto` (the default) to enable colors,
-disable colors, or let googletest decide. When the value is `auto`, googletest
-will use colors if and only if the output goes to a terminal and (on non-Windows
-platforms) the `TERM` environment variable is set to `xterm` or `xterm-color`.
-
-#### Suppressing the Elapsed Time
-
-By default, googletest prints the time it takes to run each test. To disable
-that, run the test program with the `--gtest_print_time=0` command line flag, or
-set the GTEST_PRINT_TIME environment variable to `0`.
-
-#### Suppressing UTF-8 Text Output
-
-In case of assertion failures, googletest prints expected and actual values of
-type `string` both as hex-encoded strings as well as in readable UTF-8 text if
-they contain valid non-ASCII UTF-8 characters. If you want to suppress the UTF-8
-text because, for example, you don't have an UTF-8 compatible output medium, run
-the test program with `--gtest_print_utf8=0` or set the `GTEST_PRINT_UTF8`
-environment variable to `0`.
-
-
-
-#### Generating an XML Report
-
-googletest can emit a detailed XML report to a file in addition to its normal
-textual output. The report contains the duration of each test, and thus can help
-you identify slow tests. The report is also used by the http://unittest
-dashboard to show per-test-method error messages.
-
-To generate the XML report, set the `GTEST_OUTPUT` environment variable or the
-`--gtest_output` flag to the string `"xml:path_to_output_file"`, which will
-create the file at the given location. You can also just use the string `"xml"`,
-in which case the output can be found in the `test_detail.xml` file in the
-current directory.
-
-If you specify a directory (for example, `"xml:output/directory/"` on Linux or
-`"xml:output\directory\"` on Windows), googletest will create the XML file in
-that directory, named after the test executable (e.g. `foo_test.xml` for test
-program `foo_test` or `foo_test.exe`). If the file already exists (perhaps left
-over from a previous run), googletest will pick a different name (e.g.
-`foo_test_1.xml`) to avoid overwriting it.
-
-The report is based on the `junitreport` Ant task. Since that format was
-originally intended for Java, a little interpretation is required to make it
-apply to googletest tests, as shown here:
-
-```xml
-<testsuites name="AllTests" ...>
-  <testsuite name="test_case_name" ...>
-    <testcase    name="test_name" ...>
-      <failure message="..."/>
-      <failure message="..."/>
-      <failure message="..."/>
-    </testcase>
-  </testsuite>
-</testsuites>
-```
-
-*   The root `<testsuites>` element corresponds to the entire test program.
-*   `<testsuite>` elements correspond to googletest test suites.
-*   `<testcase>` elements correspond to googletest test functions.
-
-For instance, the following program
-
-```c++
-TEST(MathTest, Addition) { ... }
-TEST(MathTest, Subtraction) { ... }
-TEST(LogicTest, NonContradiction) { ... }
-```
-
-could generate this report:
-
-```xml
-<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="3" failures="1" errors="0" time="0.035" timestamp="2011-10-31T18:52:42" name="AllTests">
-  <testsuite name="MathTest" tests="2" failures="1" errors="0" time="0.015">
-    <testcase name="Addition" status="run" time="0.007" classname="">
-      <failure message="Value of: add(1, 1)&#x0A;  Actual: 3&#x0A;Expected: 2" type="">...</failure>
-      <failure message="Value of: add(1, -1)&#x0A;  Actual: 1&#x0A;Expected: 0" type="">...</failure>
-    </testcase>
-    <testcase name="Subtraction" status="run" time="0.005" classname="">
-    </testcase>
-  </testsuite>
-  <testsuite name="LogicTest" tests="1" failures="0" errors="0" time="0.005">
-    <testcase name="NonContradiction" status="run" time="0.005" classname="">
-    </testcase>
-  </testsuite>
-</testsuites>
-```
-
-Things to note:
-
-*   The `tests` attribute of a `<testsuites>` or `<testsuite>` element tells how
-    many test functions the googletest program or test suite contains, while the
-    `failures` attribute tells how many of them failed.
-
-*   The `time` attribute expresses the duration of the test, test suite, or
-    entire test program in seconds.
-
-*   The `timestamp` attribute records the local date and time of the test
-    execution.
-
-*   Each `<failure>` element corresponds to a single failed googletest
-    assertion.
-
-#### Generating a JSON Report
-
-googletest can also emit a JSON report as an alternative format to XML. To
-generate the JSON report, set the `GTEST_OUTPUT` environment variable or the
-`--gtest_output` flag to the string `"json:path_to_output_file"`, which will
-create the file at the given location. You can also just use the string
-`"json"`, in which case the output can be found in the `test_detail.json` file
-in the current directory.
-
-The report format conforms to the following JSON Schema:
-
-```json
-{
-  "$schema": "http://json-schema.org/schema#",
-  "type": "object",
-  "definitions": {
-    "TestCase": {
-      "type": "object",
-      "properties": {
-        "name": { "type": "string" },
-        "tests": { "type": "integer" },
-        "failures": { "type": "integer" },
-        "disabled": { "type": "integer" },
-        "time": { "type": "string" },
-        "testsuite": {
-          "type": "array",
-          "items": {
-            "$ref": "#/definitions/TestInfo"
-          }
-        }
-      }
-    },
-    "TestInfo": {
-      "type": "object",
-      "properties": {
-        "name": { "type": "string" },
-        "status": {
-          "type": "string",
-          "enum": ["RUN", "NOTRUN"]
-        },
-        "time": { "type": "string" },
-        "classname": { "type": "string" },
-        "failures": {
-          "type": "array",
-          "items": {
-            "$ref": "#/definitions/Failure"
-          }
-        }
-      }
-    },
-    "Failure": {
-      "type": "object",
-      "properties": {
-        "failures": { "type": "string" },
-        "type": { "type": "string" }
-      }
-    }
-  },
-  "properties": {
-    "tests": { "type": "integer" },
-    "failures": { "type": "integer" },
-    "disabled": { "type": "integer" },
-    "errors": { "type": "integer" },
-    "timestamp": {
-      "type": "string",
-      "format": "date-time"
-    },
-    "time": { "type": "string" },
-    "name": { "type": "string" },
-    "testsuites": {
-      "type": "array",
-      "items": {
-        "$ref": "#/definitions/TestCase"
-      }
-    }
-  }
-}
-```
-
-The report uses the format that conforms to the following Proto3 using the
-[JSON encoding](https://developers.google.com/protocol-buffers/docs/proto3#json):
-
-```proto
-syntax = "proto3";
-
-package googletest;
-
-import "google/protobuf/timestamp.proto";
-import "google/protobuf/duration.proto";
-
-message UnitTest {
-  int32 tests = 1;
-  int32 failures = 2;
-  int32 disabled = 3;
-  int32 errors = 4;
-  google.protobuf.Timestamp timestamp = 5;
-  google.protobuf.Duration time = 6;
-  string name = 7;
-  repeated TestCase testsuites = 8;
-}
-
-message TestCase {
-  string name = 1;
-  int32 tests = 2;
-  int32 failures = 3;
-  int32 disabled = 4;
-  int32 errors = 5;
-  google.protobuf.Duration time = 6;
-  repeated TestInfo testsuite = 7;
-}
-
-message TestInfo {
-  string name = 1;
-  enum Status {
-    RUN = 0;
-    NOTRUN = 1;
-  }
-  Status status = 2;
-  google.protobuf.Duration time = 3;
-  string classname = 4;
-  message Failure {
-    string failures = 1;
-    string type = 2;
-  }
-  repeated Failure failures = 5;
-}
-```
-
-For instance, the following program
-
-```c++
-TEST(MathTest, Addition) { ... }
-TEST(MathTest, Subtraction) { ... }
-TEST(LogicTest, NonContradiction) { ... }
-```
-
-could generate this report:
-
-```json
-{
-  "tests": 3,
-  "failures": 1,
-  "errors": 0,
-  "time": "0.035s",
-  "timestamp": "2011-10-31T18:52:42Z",
-  "name": "AllTests",
-  "testsuites": [
-    {
-      "name": "MathTest",
-      "tests": 2,
-      "failures": 1,
-      "errors": 0,
-      "time": "0.015s",
-      "testsuite": [
-        {
-          "name": "Addition",
-          "status": "RUN",
-          "time": "0.007s",
-          "classname": "",
-          "failures": [
-            {
-              "message": "Value of: add(1, 1)\n  Actual: 3\nExpected: 2",
-              "type": ""
-            },
-            {
-              "message": "Value of: add(1, -1)\n  Actual: 1\nExpected: 0",
-              "type": ""
-            }
-          ]
-        },
-        {
-          "name": "Subtraction",
-          "status": "RUN",
-          "time": "0.005s",
-          "classname": ""
-        }
-      ]
-    },
-    {
-      "name": "LogicTest",
-      "tests": 1,
-      "failures": 0,
-      "errors": 0,
-      "time": "0.005s",
-      "testsuite": [
-        {
-          "name": "NonContradiction",
-          "status": "RUN",
-          "time": "0.005s",
-          "classname": ""
-        }
-      ]
-    }
-  ]
-}
-```
-
-IMPORTANT: The exact format of the JSON document is subject to change.
-
-### Controlling How Failures Are Reported
-
-#### Turning Assertion Failures into Break-Points
-
-When running test programs under a debugger, it's very convenient if the
-debugger can catch an assertion failure and automatically drop into interactive
-mode. googletest's *break-on-failure* mode supports this behavior.
-
-To enable it, set the `GTEST_BREAK_ON_FAILURE` environment variable to a value
-other than `0`. Alternatively, you can use the `--gtest_break_on_failure`
-command line flag.
-
-#### Disabling Catching Test-Thrown Exceptions
-
-googletest can be used either with or without exceptions enabled. If a test
-throws a C++ exception or (on Windows) a structured exception (SEH), by default
-googletest catches it, reports it as a test failure, and continues with the next
-test method. This maximizes the coverage of a test run. Also, on Windows an
-uncaught exception will cause a pop-up window, so catching the exceptions allows
-you to run the tests automatically.
-
-When debugging the test failures, however, you may instead want the exceptions
-to be handled by the debugger, such that you can examine the call stack when an
-exception is thrown. To achieve that, set the `GTEST_CATCH_EXCEPTIONS`
-environment variable to `0`, or use the `--gtest_catch_exceptions=0` flag when
-running the tests.
diff --git a/3rdparty/gtest/docs/faq.md b/3rdparty/gtest/docs/faq.md
deleted file mode 100644
index 960a8279..00000000
--- a/3rdparty/gtest/docs/faq.md
+++ /dev/null
@@ -1,753 +0,0 @@
-# Googletest FAQ
-
-<!-- GOOGLETEST_CM0014 DO NOT DELETE -->
-
-## Why should test suite names and test names not contain underscore?
-
-Underscore (`_`) is special, as C++ reserves the following to be used by the
-compiler and the standard library:
-
-1.  any identifier that starts with an `_` followed by an upper-case letter, and
-2.  any identifier that contains two consecutive underscores (i.e. `__`)
-    *anywhere* in its name.
-
-User code is *prohibited* from using such identifiers.
-
-Now let's look at what this means for `TEST` and `TEST_F`.
-
-Currently `TEST(TestSuiteName, TestName)` generates a class named
-`TestSuiteName_TestName_Test`. What happens if `TestSuiteName` or `TestName`
-contains `_`?
-
-1.  If `TestSuiteName` starts with an `_` followed by an upper-case letter (say,
-    `_Foo`), we end up with `_Foo_TestName_Test`, which is reserved and thus
-    invalid.
-2.  If `TestSuiteName` ends with an `_` (say, `Foo_`), we get
-    `Foo__TestName_Test`, which is invalid.
-3.  If `TestName` starts with an `_` (say, `_Bar`), we get
-    `TestSuiteName__Bar_Test`, which is invalid.
-4.  If `TestName` ends with an `_` (say, `Bar_`), we get
-    `TestSuiteName_Bar__Test`, which is invalid.
-
-So clearly `TestSuiteName` and `TestName` cannot start or end with `_`
-(Actually, `TestSuiteName` can start with `_` -- as long as the `_` isn't
-followed by an upper-case letter. But that's getting complicated. So for
-simplicity we just say that it cannot start with `_`.).
-
-It may seem fine for `TestSuiteName` and `TestName` to contain `_` in the
-middle. However, consider this:
-
-```c++
-TEST(Time, Flies_Like_An_Arrow) { ... }
-TEST(Time_Flies, Like_An_Arrow) { ... }
-```
-
-Now, the two `TEST`s will both generate the same class
-(`Time_Flies_Like_An_Arrow_Test`). That's not good.
-
-So for simplicity, we just ask the users to avoid `_` in `TestSuiteName` and
-`TestName`. The rule is more constraining than necessary, but it's simple and
-easy to remember. It also gives googletest some wiggle room in case its
-implementation needs to change in the future.
-
-If you violate the rule, there may not be immediate consequences, but your test
-may (just may) break with a new compiler (or a new version of the compiler you
-are using) or with a new version of googletest. Therefore it's best to follow
-the rule.
-
-## Why does googletest support `EXPECT_EQ(NULL, ptr)` and `ASSERT_EQ(NULL, ptr)` but not `EXPECT_NE(NULL, ptr)` and `ASSERT_NE(NULL, ptr)`?
-
-First of all you can use `EXPECT_NE(nullptr, ptr)` and `ASSERT_NE(nullptr,
-ptr)`. This is the preferred syntax in the style guide because nullptr does not
-have the type problems that NULL does. Which is why NULL does not work.
-
-Due to some peculiarity of C++, it requires some non-trivial template meta
-programming tricks to support using `NULL` as an argument of the `EXPECT_XX()`
-and `ASSERT_XX()` macros. Therefore we only do it where it's most needed
-(otherwise we make the implementation of googletest harder to maintain and more
-error-prone than necessary).
-
-The `EXPECT_EQ()` macro takes the *expected* value as its first argument and the
-*actual* value as the second. It's reasonable that someone wants to write
-`EXPECT_EQ(NULL, some_expression)`, and this indeed was requested several times.
-Therefore we implemented it.
-
-The need for `EXPECT_NE(NULL, ptr)` isn't nearly as strong. When the assertion
-fails, you already know that `ptr` must be `NULL`, so it doesn't add any
-information to print `ptr` in this case. That means `EXPECT_TRUE(ptr != NULL)`
-works just as well.
-
-If we were to support `EXPECT_NE(NULL, ptr)`, for consistency we'll have to
-support `EXPECT_NE(ptr, NULL)` as well, as unlike `EXPECT_EQ`, we don't have a
-convention on the order of the two arguments for `EXPECT_NE`. This means using
-the template meta programming tricks twice in the implementation, making it even
-harder to understand and maintain. We believe the benefit doesn't justify the
-cost.
-
-Finally, with the growth of the gMock matcher library, we are encouraging people
-to use the unified `EXPECT_THAT(value, matcher)` syntax more often in tests. One
-significant advantage of the matcher approach is that matchers can be easily
-combined to form new matchers, while the `EXPECT_NE`, etc, macros cannot be
-easily combined. Therefore we want to invest more in the matchers than in the
-`EXPECT_XX()` macros.
-
-## I need to test that different implementations of an interface satisfy some common requirements. Should I use typed tests or value-parameterized tests?
-
-For testing various implementations of the same interface, either typed tests or
-value-parameterized tests can get it done. It's really up to you the user to
-decide which is more convenient for you, depending on your particular case. Some
-rough guidelines:
-
-*   Typed tests can be easier to write if instances of the different
-    implementations can be created the same way, modulo the type. For example,
-    if all these implementations have a public default constructor (such that
-    you can write `new TypeParam`), or if their factory functions have the same
-    form (e.g. `CreateInstance<TypeParam>()`).
-*   Value-parameterized tests can be easier to write if you need different code
-    patterns to create different implementations' instances, e.g. `new Foo` vs
-    `new Bar(5)`. To accommodate for the differences, you can write factory
-    function wrappers and pass these function pointers to the tests as their
-    parameters.
-*   When a typed test fails, the default output includes the name of the type,
-    which can help you quickly identify which implementation is wrong.
-    Value-parameterized tests only show the number of the failed iteration by
-    default. You will need to define a function that returns the iteration name
-    and pass it as the third parameter to INSTANTIATE_TEST_SUITE_P to have more
-    useful output.
-*   When using typed tests, you need to make sure you are testing against the
-    interface type, not the concrete types (in other words, you want to make
-    sure `implicit_cast<MyInterface*>(my_concrete_impl)` works, not just that
-    `my_concrete_impl` works). It's less likely to make mistakes in this area
-    when using value-parameterized tests.
-
-I hope I didn't confuse you more. :-) If you don't mind, I'd suggest you to give
-both approaches a try. Practice is a much better way to grasp the subtle
-differences between the two tools. Once you have some concrete experience, you
-can much more easily decide which one to use the next time.
-
-## I got some run-time errors about invalid proto descriptors when using `ProtocolMessageEquals`. Help!
-
-**Note:** `ProtocolMessageEquals` and `ProtocolMessageEquiv` are *deprecated*
-now. Please use `EqualsProto`, etc instead.
-
-`ProtocolMessageEquals` and `ProtocolMessageEquiv` were redefined recently and
-are now less tolerant of invalid protocol buffer definitions. In particular, if
-you have a `foo.proto` that doesn't fully qualify the type of a protocol message
-it references (e.g. `message<Bar>` where it should be `message<blah.Bar>`), you
-will now get run-time errors like:
-
-```
-... descriptor.cc:...] Invalid proto descriptor for file "path/to/foo.proto":
-... descriptor.cc:...]  blah.MyMessage.my_field: ".Bar" is not defined.
-```
-
-If you see this, your `.proto` file is broken and needs to be fixed by making
-the types fully qualified. The new definition of `ProtocolMessageEquals` and
-`ProtocolMessageEquiv` just happen to reveal your bug.
-
-## My death test modifies some state, but the change seems lost after the death test finishes. Why?
-
-Death tests (`EXPECT_DEATH`, etc) are executed in a sub-process s.t. the
-expected crash won't kill the test program (i.e. the parent process). As a
-result, any in-memory side effects they incur are observable in their respective
-sub-processes, but not in the parent process. You can think of them as running
-in a parallel universe, more or less.
-
-In particular, if you use mocking and the death test statement invokes some mock
-methods, the parent process will think the calls have never occurred. Therefore,
-you may want to move your `EXPECT_CALL` statements inside the `EXPECT_DEATH`
-macro.
-
-## EXPECT_EQ(htonl(blah), blah_blah) generates weird compiler errors in opt mode. Is this a googletest bug?
-
-Actually, the bug is in `htonl()`.
-
-According to `'man htonl'`, `htonl()` is a *function*, which means it's valid to
-use `htonl` as a function pointer. However, in opt mode `htonl()` is defined as
-a *macro*, which breaks this usage.
-
-Worse, the macro definition of `htonl()` uses a `gcc` extension and is *not*
-standard C++. That hacky implementation has some ad hoc limitations. In
-particular, it prevents you from writing `Foo<sizeof(htonl(x))>()`, where `Foo`
-is a template that has an integral argument.
-
-The implementation of `EXPECT_EQ(a, b)` uses `sizeof(... a ...)` inside a
-template argument, and thus doesn't compile in opt mode when `a` contains a call
-to `htonl()`. It is difficult to make `EXPECT_EQ` bypass the `htonl()` bug, as
-the solution must work with different compilers on various platforms.
-
-`htonl()` has some other problems as described in `//util/endian/endian.h`,
-which defines `ghtonl()` to replace it. `ghtonl()` does the same thing `htonl()`
-does, only without its problems. We suggest you to use `ghtonl()` instead of
-`htonl()`, both in your tests and production code.
-
-`//util/endian/endian.h` also defines `ghtons()`, which solves similar problems
-in `htons()`.
-
-Don't forget to add `//util/endian` to the list of dependencies in the `BUILD`
-file wherever `ghtonl()` and `ghtons()` are used. The library consists of a
-single header file and will not bloat your binary.
-
-## The compiler complains about "undefined references" to some static const member variables, but I did define them in the class body. What's wrong?
-
-If your class has a static data member:
-
-```c++
-// foo.h
-class Foo {
-  ...
-  static const int kBar = 100;
-};
-```
-
-You also need to define it *outside* of the class body in `foo.cc`:
-
-```c++
-const int Foo::kBar;  // No initializer here.
-```
-
-Otherwise your code is **invalid C++**, and may break in unexpected ways. In
-particular, using it in googletest comparison assertions (`EXPECT_EQ`, etc) will
-generate an "undefined reference" linker error. The fact that "it used to work"
-doesn't mean it's valid. It just means that you were lucky. :-)
-
-## Can I derive a test fixture from another?
-
-Yes.
-
-Each test fixture has a corresponding and same named test suite. This means only
-one test suite can use a particular fixture. Sometimes, however, multiple test
-cases may want to use the same or slightly different fixtures. For example, you
-may want to make sure that all of a GUI library's test suites don't leak
-important system resources like fonts and brushes.
-
-In googletest, you share a fixture among test suites by putting the shared logic
-in a base test fixture, then deriving from that base a separate fixture for each
-test suite that wants to use this common logic. You then use `TEST_F()` to write
-tests using each derived fixture.
-
-Typically, your code looks like this:
-
-```c++
-// Defines a base test fixture.
-class BaseTest : public ::testing::Test {
- protected:
-  ...
-};
-
-// Derives a fixture FooTest from BaseTest.
-class FooTest : public BaseTest {
- protected:
-  void SetUp() override {
-    BaseTest::SetUp();  // Sets up the base fixture first.
-    ... additional set-up work ...
-  }
-
-  void TearDown() override {
-    ... clean-up work for FooTest ...
-    BaseTest::TearDown();  // Remember to tear down the base fixture
-                           // after cleaning up FooTest!
-  }
-
-  ... functions and variables for FooTest ...
-};
-
-// Tests that use the fixture FooTest.
-TEST_F(FooTest, Bar) { ... }
-TEST_F(FooTest, Baz) { ... }
-
-... additional fixtures derived from BaseTest ...
-```
-
-If necessary, you can continue to derive test fixtures from a derived fixture.
-googletest has no limit on how deep the hierarchy can be.
-
-For a complete example using derived test fixtures, see
-[sample5_unittest.cc](../samples/sample5_unittest.cc).
-
-## My compiler complains "void value not ignored as it ought to be." What does this mean?
-
-You're probably using an `ASSERT_*()` in a function that doesn't return `void`.
-`ASSERT_*()` can only be used in `void` functions, due to exceptions being
-disabled by our build system. Please see more details
-[here](advanced.md#assertion-placement).
-
-## My death test hangs (or seg-faults). How do I fix it?
-
-In googletest, death tests are run in a child process and the way they work is
-delicate. To write death tests you really need to understand how they work.
-Please make sure you have read [this](advanced.md#how-it-works).
-
-In particular, death tests don't like having multiple threads in the parent
-process. So the first thing you can try is to eliminate creating threads outside
-of `EXPECT_DEATH()`. For example, you may want to use mocks or fake objects
-instead of real ones in your tests.
-
-Sometimes this is impossible as some library you must use may be creating
-threads before `main()` is even reached. In this case, you can try to minimize
-the chance of conflicts by either moving as many activities as possible inside
-`EXPECT_DEATH()` (in the extreme case, you want to move everything inside), or
-leaving as few things as possible in it. Also, you can try to set the death test
-style to `"threadsafe"`, which is safer but slower, and see if it helps.
-
-If you go with thread-safe death tests, remember that they rerun the test
-program from the beginning in the child process. Therefore make sure your
-program can run side-by-side with itself and is deterministic.
-
-In the end, this boils down to good concurrent programming. You have to make
-sure that there is no race conditions or dead locks in your program. No silver
-bullet - sorry!
-
-## Should I use the constructor/destructor of the test fixture or SetUp()/TearDown()? {#CtorVsSetUp}
-
-The first thing to remember is that googletest does **not** reuse the same test
-fixture object across multiple tests. For each `TEST_F`, googletest will create
-a **fresh** test fixture object, immediately call `SetUp()`, run the test body,
-call `TearDown()`, and then delete the test fixture object.
-
-When you need to write per-test set-up and tear-down logic, you have the choice
-between using the test fixture constructor/destructor or `SetUp()/TearDown()`.
-The former is usually preferred, as it has the following benefits:
-
-*   By initializing a member variable in the constructor, we have the option to
-    make it `const`, which helps prevent accidental changes to its value and
-    makes the tests more obviously correct.
-*   In case we need to subclass the test fixture class, the subclass'
-    constructor is guaranteed to call the base class' constructor *first*, and
-    the subclass' destructor is guaranteed to call the base class' destructor
-    *afterward*. With `SetUp()/TearDown()`, a subclass may make the mistake of
-    forgetting to call the base class' `SetUp()/TearDown()` or call them at the
-    wrong time.
-
-You may still want to use `SetUp()/TearDown()` in the following cases:
-
-*   C++ does not allow virtual function calls in constructors and destructors.
-    You can call a method declared as virtual, but it will not use dynamic
-    dispatch, it will use the definition from the class the constructor of which
-    is currently executing. This is because calling a virtual method before the
-    derived class constructor has a chance to run is very dangerous - the
-    virtual method might operate on uninitialized data. Therefore, if you need
-    to call a method that will be overridden in a derived class, you have to use
-    `SetUp()/TearDown()`.
-*   In the body of a constructor (or destructor), it's not possible to use the
-    `ASSERT_xx` macros. Therefore, if the set-up operation could cause a fatal
-    test failure that should prevent the test from running, it's necessary to
-    use `abort` <!-- GOOGLETEST_CM0015 DO NOT DELETE --> and abort the whole test executable,
-    or to use `SetUp()` instead of a constructor.
-*   If the tear-down operation could throw an exception, you must use
-    `TearDown()` as opposed to the destructor, as throwing in a destructor leads
-    to undefined behavior and usually will kill your program right away. Note
-    that many standard libraries (like STL) may throw when exceptions are
-    enabled in the compiler. Therefore you should prefer `TearDown()` if you
-    want to write portable tests that work with or without exceptions.
-*   The googletest team is considering making the assertion macros throw on
-    platforms where exceptions are enabled (e.g. Windows, Mac OS, and Linux
-    client-side), which will eliminate the need for the user to propagate
-    failures from a subroutine to its caller. Therefore, you shouldn't use
-    googletest assertions in a destructor if your code could run on such a
-    platform.
-
-## The compiler complains "no matching function to call" when I use ASSERT_PRED*. How do I fix it?
-
-If the predicate function you use in `ASSERT_PRED*` or `EXPECT_PRED*` is
-overloaded or a template, the compiler will have trouble figuring out which
-overloaded version it should use. `ASSERT_PRED_FORMAT*` and
-`EXPECT_PRED_FORMAT*` don't have this problem.
-
-If you see this error, you might want to switch to
-`(ASSERT|EXPECT)_PRED_FORMAT*`, which will also give you a better failure
-message. If, however, that is not an option, you can resolve the problem by
-explicitly telling the compiler which version to pick.
-
-For example, suppose you have
-
-```c++
-bool IsPositive(int n) {
-  return n > 0;
-}
-
-bool IsPositive(double x) {
-  return x > 0;
-}
-```
-
-you will get a compiler error if you write
-
-```c++
-EXPECT_PRED1(IsPositive, 5);
-```
-
-However, this will work:
-
-```c++
-EXPECT_PRED1(static_cast<bool (*)(int)>(IsPositive), 5);
-```
-
-(The stuff inside the angled brackets for the `static_cast` operator is the type
-of the function pointer for the `int`-version of `IsPositive()`.)
-
-As another example, when you have a template function
-
-```c++
-template <typename T>
-bool IsNegative(T x) {
-  return x < 0;
-}
-```
-
-you can use it in a predicate assertion like this:
-
-```c++
-ASSERT_PRED1(IsNegative<int>, -5);
-```
-
-Things are more interesting if your template has more than one parameters. The
-following won't compile:
-
-```c++
-ASSERT_PRED2(GreaterThan<int, int>, 5, 0);
-```
-
-as the C++ pre-processor thinks you are giving `ASSERT_PRED2` 4 arguments, which
-is one more than expected. The workaround is to wrap the predicate function in
-parentheses:
-
-```c++
-ASSERT_PRED2((GreaterThan<int, int>), 5, 0);
-```
-
-## My compiler complains about "ignoring return value" when I call RUN_ALL_TESTS(). Why?
-
-Some people had been ignoring the return value of `RUN_ALL_TESTS()`. That is,
-instead of
-
-```c++
-  return RUN_ALL_TESTS();
-```
-
-they write
-
-```c++
-  RUN_ALL_TESTS();
-```
-
-This is **wrong and dangerous**. The testing services needs to see the return
-value of `RUN_ALL_TESTS()` in order to determine if a test has passed. If your
-`main()` function ignores it, your test will be considered successful even if it
-has a googletest assertion failure. Very bad.
-
-We have decided to fix this (thanks to Michael Chastain for the idea). Now, your
-code will no longer be able to ignore `RUN_ALL_TESTS()` when compiled with
-`gcc`. If you do so, you'll get a compiler error.
-
-If you see the compiler complaining about you ignoring the return value of
-`RUN_ALL_TESTS()`, the fix is simple: just make sure its value is used as the
-return value of `main()`.
-
-But how could we introduce a change that breaks existing tests? Well, in this
-case, the code was already broken in the first place, so we didn't break it. :-)
-
-## My compiler complains that a constructor (or destructor) cannot return a value. What's going on?
-
-Due to a peculiarity of C++, in order to support the syntax for streaming
-messages to an `ASSERT_*`, e.g.
-
-```c++
-  ASSERT_EQ(1, Foo()) << "blah blah" << foo;
-```
-
-we had to give up using `ASSERT*` and `FAIL*` (but not `EXPECT*` and
-`ADD_FAILURE*`) in constructors and destructors. The workaround is to move the
-content of your constructor/destructor to a private void member function, or
-switch to `EXPECT_*()` if that works. This
-[section](advanced.md#assertion-placement) in the user's guide explains it.
-
-## My SetUp() function is not called. Why?
-
-C++ is case-sensitive. Did you spell it as `Setup()`?
-
-Similarly, sometimes people spell `SetUpTestSuite()` as `SetupTestSuite()` and
-wonder why it's never called.
-
-
-## I have several test suites which share the same test fixture logic, do I have to define a new test fixture class for each of them? This seems pretty tedious.
-
-You don't have to. Instead of
-
-```c++
-class FooTest : public BaseTest {};
-
-TEST_F(FooTest, Abc) { ... }
-TEST_F(FooTest, Def) { ... }
-
-class BarTest : public BaseTest {};
-
-TEST_F(BarTest, Abc) { ... }
-TEST_F(BarTest, Def) { ... }
-```
-
-you can simply `typedef` the test fixtures:
-
-```c++
-typedef BaseTest FooTest;
-
-TEST_F(FooTest, Abc) { ... }
-TEST_F(FooTest, Def) { ... }
-
-typedef BaseTest BarTest;
-
-TEST_F(BarTest, Abc) { ... }
-TEST_F(BarTest, Def) { ... }
-```
-
-## googletest output is buried in a whole bunch of LOG messages. What do I do?
-
-The googletest output is meant to be a concise and human-friendly report. If
-your test generates textual output itself, it will mix with the googletest
-output, making it hard to read. However, there is an easy solution to this
-problem.
-
-Since `LOG` messages go to stderr, we decided to let googletest output go to
-stdout. This way, you can easily separate the two using redirection. For
-example:
-
-```shell
-$ ./my_test > gtest_output.txt
-```
-
-## Why should I prefer test fixtures over global variables?
-
-There are several good reasons:
-
-1.  It's likely your test needs to change the states of its global variables.
-    This makes it difficult to keep side effects from escaping one test and
-    contaminating others, making debugging difficult. By using fixtures, each
-    test has a fresh set of variables that's different (but with the same
-    names). Thus, tests are kept independent of each other.
-2.  Global variables pollute the global namespace.
-3.  Test fixtures can be reused via subclassing, which cannot be done easily
-    with global variables. This is useful if many test suites have something in
-    common.
-
-## What can the statement argument in ASSERT_DEATH() be?
-
-`ASSERT_DEATH(*statement*, *regex*)` (or any death assertion macro) can be used
-wherever `*statement*` is valid. So basically `*statement*` can be any C++
-statement that makes sense in the current context. In particular, it can
-reference global and/or local variables, and can be:
-
-*   a simple function call (often the case),
-*   a complex expression, or
-*   a compound statement.
-
-Some examples are shown here:
-
-```c++
-// A death test can be a simple function call.
-TEST(MyDeathTest, FunctionCall) {
-  ASSERT_DEATH(Xyz(5), "Xyz failed");
-}
-
-// Or a complex expression that references variables and functions.
-TEST(MyDeathTest, ComplexExpression) {
-  const bool c = Condition();
-  ASSERT_DEATH((c ? Func1(0) : object2.Method("test")),
-               "(Func1|Method) failed");
-}
-
-// Death assertions can be used any where in a function.  In
-// particular, they can be inside a loop.
-TEST(MyDeathTest, InsideLoop) {
-  // Verifies that Foo(0), Foo(1), ..., and Foo(4) all die.
-  for (int i = 0; i < 5; i++) {
-    EXPECT_DEATH_M(Foo(i), "Foo has \\d+ errors",
-                   ::testing::Message() << "where i is " << i);
-  }
-}
-
-// A death assertion can contain a compound statement.
-TEST(MyDeathTest, CompoundStatement) {
-  // Verifies that at lease one of Bar(0), Bar(1), ..., and
-  // Bar(4) dies.
-  ASSERT_DEATH({
-    for (int i = 0; i < 5; i++) {
-      Bar(i);
-    }
-  },
-  "Bar has \\d+ errors");
-}
-```
-
-gtest-death-test_test.cc contains more examples if you are interested.
-
-## I have a fixture class `FooTest`, but `TEST_F(FooTest, Bar)` gives me error ``"no matching function for call to `FooTest::FooTest()'"``. Why?
-
-Googletest needs to be able to create objects of your test fixture class, so it
-must have a default constructor. Normally the compiler will define one for you.
-However, there are cases where you have to define your own:
-
-*   If you explicitly declare a non-default constructor for class `FooTest`
-    (`DISALLOW_EVIL_CONSTRUCTORS()` does this), then you need to define a
-    default constructor, even if it would be empty.
-*   If `FooTest` has a const non-static data member, then you have to define the
-    default constructor *and* initialize the const member in the initializer
-    list of the constructor. (Early versions of `gcc` doesn't force you to
-    initialize the const member. It's a bug that has been fixed in `gcc 4`.)
-
-## Why does ASSERT_DEATH complain about previous threads that were already joined?
-
-With the Linux pthread library, there is no turning back once you cross the line
-from single thread to multiple threads. The first time you create a thread, a
-manager thread is created in addition, so you get 3, not 2, threads. Later when
-the thread you create joins the main thread, the thread count decrements by 1,
-but the manager thread will never be killed, so you still have 2 threads, which
-means you cannot safely run a death test.
-
-The new NPTL thread library doesn't suffer from this problem, as it doesn't
-create a manager thread. However, if you don't control which machine your test
-runs on, you shouldn't depend on this.
-
-## Why does googletest require the entire test suite, instead of individual tests, to be named *DeathTest when it uses ASSERT_DEATH?
-
-googletest does not interleave tests from different test suites. That is, it
-runs all tests in one test suite first, and then runs all tests in the next test
-suite, and so on. googletest does this because it needs to set up a test suite
-before the first test in it is run, and tear it down afterwords. Splitting up
-the test case would require multiple set-up and tear-down processes, which is
-inefficient and makes the semantics unclean.
-
-If we were to determine the order of tests based on test name instead of test
-case name, then we would have a problem with the following situation:
-
-```c++
-TEST_F(FooTest, AbcDeathTest) { ... }
-TEST_F(FooTest, Uvw) { ... }
-
-TEST_F(BarTest, DefDeathTest) { ... }
-TEST_F(BarTest, Xyz) { ... }
-```
-
-Since `FooTest.AbcDeathTest` needs to run before `BarTest.Xyz`, and we don't
-interleave tests from different test suites, we need to run all tests in the
-`FooTest` case before running any test in the `BarTest` case. This contradicts
-with the requirement to run `BarTest.DefDeathTest` before `FooTest.Uvw`.
-
-## But I don't like calling my entire test suite \*DeathTest when it contains both death tests and non-death tests. What do I do?
-
-You don't have to, but if you like, you may split up the test suite into
-`FooTest` and `FooDeathTest`, where the names make it clear that they are
-related:
-
-```c++
-class FooTest : public ::testing::Test { ... };
-
-TEST_F(FooTest, Abc) { ... }
-TEST_F(FooTest, Def) { ... }
-
-using FooDeathTest = FooTest;
-
-TEST_F(FooDeathTest, Uvw) { ... EXPECT_DEATH(...) ... }
-TEST_F(FooDeathTest, Xyz) { ... ASSERT_DEATH(...) ... }
-```
-
-## googletest prints the LOG messages in a death test's child process only when the test fails. How can I see the LOG messages when the death test succeeds?
-
-Printing the LOG messages generated by the statement inside `EXPECT_DEATH()`
-makes it harder to search for real problems in the parent's log. Therefore,
-googletest only prints them when the death test has failed.
-
-If you really need to see such LOG messages, a workaround is to temporarily
-break the death test (e.g. by changing the regex pattern it is expected to
-match). Admittedly, this is a hack. We'll consider a more permanent solution
-after the fork-and-exec-style death tests are implemented.
-
-## The compiler complains about "no match for 'operator<<'" when I use an assertion. What gives?
-
-If you use a user-defined type `FooType` in an assertion, you must make sure
-there is an `std::ostream& operator<<(std::ostream&, const FooType&)` function
-defined such that we can print a value of `FooType`.
-
-In addition, if `FooType` is declared in a name space, the `<<` operator also
-needs to be defined in the *same* name space. See https://abseil.io/tips/49 for details.
-
-## How do I suppress the memory leak messages on Windows?
-
-Since the statically initialized googletest singleton requires allocations on
-the heap, the Visual C++ memory leak detector will report memory leaks at the
-end of the program run. The easiest way to avoid this is to use the
-`_CrtMemCheckpoint` and `_CrtMemDumpAllObjectsSince` calls to not report any
-statically initialized heap objects. See MSDN for more details and additional
-heap check/debug routines.
-
-## How can my code detect if it is running in a test?
-
-If you write code that sniffs whether it's running in a test and does different
-things accordingly, you are leaking test-only logic into production code and
-there is no easy way to ensure that the test-only code paths aren't run by
-mistake in production. Such cleverness also leads to
-[Heisenbugs](https://en.wikipedia.org/wiki/Heisenbug). Therefore we strongly
-advise against the practice, and googletest doesn't provide a way to do it.
-
-In general, the recommended way to cause the code to behave differently under
-test is [Dependency Injection](https://en.wikipedia.org/wiki/Dependency_injection). You can inject
-different functionality from the test and from the production code. Since your
-production code doesn't link in the for-test logic at all (the
-[`testonly`](https://docs.bazel.build/versions/master/be/common-definitions.html#common.testonly) attribute for BUILD targets helps to ensure
-that), there is no danger in accidentally running it.
-
-However, if you *really*, *really*, *really* have no choice, and if you follow
-the rule of ending your test program names with `_test`, you can use the
-*horrible* hack of sniffing your executable name (`argv[0]` in `main()`) to know
-whether the code is under test.
-
-## How do I temporarily disable a test?
-
-If you have a broken test that you cannot fix right away, you can add the
-DISABLED_ prefix to its name. This will exclude it from execution. This is
-better than commenting out the code or using #if 0, as disabled tests are still
-compiled (and thus won't rot).
-
-To include disabled tests in test execution, just invoke the test program with
-the --gtest_also_run_disabled_tests flag.
-
-## Is it OK if I have two separate `TEST(Foo, Bar)` test methods defined in different namespaces?
-
-Yes.
-
-The rule is **all test methods in the same test suite must use the same fixture
-class.** This means that the following is **allowed** because both tests use the
-same fixture class (`::testing::Test`).
-
-```c++
-namespace foo {
-TEST(CoolTest, DoSomething) {
-  SUCCEED();
-}
-}  // namespace foo
-
-namespace bar {
-TEST(CoolTest, DoSomething) {
-  SUCCEED();
-}
-}  // namespace bar
-```
-
-However, the following code is **not allowed** and will produce a runtime error
-from googletest because the test methods are using different test fixture
-classes with the same test suite name.
-
-```c++
-namespace foo {
-class CoolTest : public ::testing::Test {};  // Fixture foo::CoolTest
-TEST_F(CoolTest, DoSomething) {
-  SUCCEED();
-}
-}  // namespace foo
-
-namespace bar {
-class CoolTest : public ::testing::Test {};  // Fixture: bar::CoolTest
-TEST_F(CoolTest, DoSomething) {
-  SUCCEED();
-}
-}  // namespace bar
-```
diff --git a/3rdparty/gtest/docs/pkgconfig.md b/3rdparty/gtest/docs/pkgconfig.md
deleted file mode 100644
index 6dc06738..00000000
--- a/3rdparty/gtest/docs/pkgconfig.md
+++ /dev/null
@@ -1,141 +0,0 @@
-## Using GoogleTest from various build systems
-
-GoogleTest comes with pkg-config files that can be used to determine all
-necessary flags for compiling and linking to GoogleTest (and GoogleMock).
-Pkg-config is a standardised plain-text format containing
-
-*   the includedir (-I) path
-*   necessary macro (-D) definitions
-*   further required flags (-pthread)
-*   the library (-L) path
-*   the library (-l) to link to
-
-All current build systems support pkg-config in one way or another. For all
-examples here we assume you want to compile the sample
-`samples/sample3_unittest.cc`.
-
-### CMake
-
-Using `pkg-config` in CMake is fairly easy:
-
-```cmake
-cmake_minimum_required(VERSION 3.0)
-
-cmake_policy(SET CMP0048 NEW)
-project(my_gtest_pkgconfig VERSION 0.0.1 LANGUAGES CXX)
-
-find_package(PkgConfig)
-pkg_search_module(GTEST REQUIRED gtest_main)
-
-add_executable(testapp samples/sample3_unittest.cc)
-target_link_libraries(testapp ${GTEST_LDFLAGS})
-target_compile_options(testapp PUBLIC ${GTEST_CFLAGS})
-
-include(CTest)
-add_test(first_and_only_test testapp)
-```
-
-It is generally recommended that you use `target_compile_options` + `_CFLAGS`
-over `target_include_directories` + `_INCLUDE_DIRS` as the former includes not
-just -I flags (GoogleTest might require a macro indicating to internal headers
-that all libraries have been compiled with threading enabled. In addition,
-GoogleTest might also require `-pthread` in the compiling step, and as such
-splitting the pkg-config `Cflags` variable into include dirs and macros for
-`target_compile_definitions()` might still miss this). The same recommendation
-goes for using `_LDFLAGS` over the more commonplace `_LIBRARIES`, which happens
-to discard `-L` flags and `-pthread`.
-
-### Autotools
-
-Finding GoogleTest in Autoconf and using it from Automake is also fairly easy:
-
-In your `configure.ac`:
-
-```
-AC_PREREQ([2.69])
-AC_INIT([my_gtest_pkgconfig], [0.0.1])
-AC_CONFIG_SRCDIR([samples/sample3_unittest.cc])
-AC_PROG_CXX
-
-PKG_CHECK_MODULES([GTEST], [gtest_main])
-
-AM_INIT_AUTOMAKE([foreign subdir-objects])
-AC_CONFIG_FILES([Makefile])
-AC_OUTPUT
-```
-
-and in your `Makefile.am`:
-
-```
-check_PROGRAMS = testapp
-TESTS = $(check_PROGRAMS)
-
-testapp_SOURCES = samples/sample3_unittest.cc
-testapp_CXXFLAGS = $(GTEST_CFLAGS)
-testapp_LDADD = $(GTEST_LIBS)
-```
-
-### Meson
-
-Meson natively uses pkgconfig to query dependencies:
-
-```
-project('my_gtest_pkgconfig', 'cpp', version : '0.0.1')
-
-gtest_dep = dependency('gtest_main')
-
-testapp = executable(
-  'testapp',
-  files(['samples/sample3_unittest.cc']),
-  dependencies : gtest_dep,
-  install : false)
-
-test('first_and_only_test', testapp)
-```
-
-### Plain Makefiles
-
-Since `pkg-config` is a small Unix command-line utility, it can be used in
-handwritten `Makefile`s too:
-
-```makefile
-GTEST_CFLAGS = `pkg-config --cflags gtest_main`
-GTEST_LIBS = `pkg-config --libs gtest_main`
-
-.PHONY: tests all
-
-tests: all
-  ./testapp
-
-all: testapp
-
-testapp: testapp.o
-  $(CXX) $(CXXFLAGS) $(LDFLAGS) $< -o $@ $(GTEST_LIBS)
-
-testapp.o: samples/sample3_unittest.cc
-  $(CXX) $(CPPFLAGS) $(CXXFLAGS) $< -c -o $@ $(GTEST_CFLAGS)
-```
-
-### Help! pkg-config can't find GoogleTest!
-
-Let's say you have a `CMakeLists.txt` along the lines of the one in this
-tutorial and you try to run `cmake`. It is very possible that you get a failure
-along the lines of:
-
-```
--- Checking for one of the modules 'gtest_main'
-CMake Error at /usr/share/cmake/Modules/FindPkgConfig.cmake:640 (message):
-  None of the required 'gtest_main' found
-```
-
-These failures are common if you installed GoogleTest yourself and have not
-sourced it from a distro or other package manager. If so, you need to tell
-pkg-config where it can find the `.pc` files containing the information. Say you
-installed GoogleTest to `/usr/local`, then it might be that the `.pc` files are
-installed under `/usr/local/lib64/pkgconfig`. If you set
-
-```
-export PKG_CONFIG_PATH=/usr/local/lib64/pkgconfig
-```
-
-pkg-config will also try to look in `PKG_CONFIG_PATH` to find `gtest_main.pc`.
diff --git a/3rdparty/gtest/docs/primer.md b/3rdparty/gtest/docs/primer.md
deleted file mode 100644
index 0317692b..00000000
--- a/3rdparty/gtest/docs/primer.md
+++ /dev/null
@@ -1,567 +0,0 @@
-# Googletest Primer
-
-## Introduction: Why googletest?
-
-*googletest* helps you write better C++ tests.
-
-googletest is a testing framework developed by the Testing Technology team with
-Google's specific requirements and constraints in mind. Whether you work on
-Linux, Windows, or a Mac, if you write C++ code, googletest can help you. And it
-supports *any* kind of tests, not just unit tests.
-
-So what makes a good test, and how does googletest fit in? We believe:
-
-1.  Tests should be *independent* and *repeatable*. It's a pain to debug a test
-    that succeeds or fails as a result of other tests. googletest isolates the
-    tests by running each of them on a different object. When a test fails,
-    googletest allows you to run it in isolation for quick debugging.
-2.  Tests should be well *organized* and reflect the structure of the tested
-    code. googletest groups related tests into test suites that can share data
-    and subroutines. This common pattern is easy to recognize and makes tests
-    easy to maintain. Such consistency is especially helpful when people switch
-    projects and start to work on a new code base.
-3.  Tests should be *portable* and *reusable*. Google has a lot of code that is
-    platform-neutral; its tests should also be platform-neutral. googletest
-    works on different OSes, with different compilers, with or without
-    exceptions, so googletest tests can work with a variety of configurations.
-4.  When tests fail, they should provide as much *information* about the problem
-    as possible. googletest doesn't stop at the first test failure. Instead, it
-    only stops the current test and continues with the next. You can also set up
-    tests that report non-fatal failures after which the current test continues.
-    Thus, you can detect and fix multiple bugs in a single run-edit-compile
-    cycle.
-5.  The testing framework should liberate test writers from housekeeping chores
-    and let them focus on the test *content*. googletest automatically keeps
-    track of all tests defined, and doesn't require the user to enumerate them
-    in order to run them.
-6.  Tests should be *fast*. With googletest, you can reuse shared resources
-    across tests and pay for the set-up/tear-down only once, without making
-    tests depend on each other.
-
-Since googletest is based on the popular xUnit architecture, you'll feel right
-at home if you've used JUnit or PyUnit before. If not, it will take you about 10
-minutes to learn the basics and get started. So let's go!
-
-## Beware of the nomenclature
-
-_Note:_ There might be some confusion arising from different definitions of the
-terms _Test_, _Test Case_ and _Test Suite_, so beware of misunderstanding these.
-
-Historically, googletest started to use the term _Test Case_ for grouping
-related tests, whereas current publications, including International Software
-Testing Qualifications Board ([ISTQB](http://www.istqb.org/)) materials and
-various textbooks on software quality, use the term
-_[Test Suite][istqb test suite]_ for this.
-
-The related term _Test_, as it is used in googletest, corresponds to the term
-_[Test Case][istqb test case]_ of ISTQB and others.
-
-The term _Test_ is commonly of broad enough sense, including ISTQB's definition
-of _Test Case_, so it's not much of a problem here. But the term _Test Case_ as
-was used in Google Test is of contradictory sense and thus confusing.
-
-googletest recently started replacing the term _Test Case_ with _Test Suite_.
-The preferred API is *TestSuite*. The older TestCase API is being slowly
-deprecated and refactored away.
-
-So please be aware of the different definitions of the terms:
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-Meaning                                                                              | googletest Term         | [ISTQB](http://www.istqb.org/) Term
-:----------------------------------------------------------------------------------- | :---------------------- | :----------------------------------
-Exercise a particular program path with specific input values and verify the results | [TEST()](#simple-tests) | [Test Case][istqb test case]
-
-<!-- mdformat on -->
-
-[istqb test case]: http://glossary.istqb.org/en/search/test%20case
-[istqb test suite]: http://glossary.istqb.org/en/search/test%20suite
-
-## Basic Concepts
-
-When using googletest, you start by writing *assertions*, which are statements
-that check whether a condition is true. An assertion's result can be *success*,
-*nonfatal failure*, or *fatal failure*. If a fatal failure occurs, it aborts the
-current function; otherwise the program continues normally.
-
-*Tests* use assertions to verify the tested code's behavior. If a test crashes
-or has a failed assertion, then it *fails*; otherwise it *succeeds*.
-
-A *test suite* contains one or many tests. You should group your tests into test
-suites that reflect the structure of the tested code. When multiple tests in a
-test suite need to share common objects and subroutines, you can put them into a
-*test fixture* class.
-
-A *test program* can contain multiple test suites.
-
-We'll now explain how to write a test program, starting at the individual
-assertion level and building up to tests and test suites.
-
-## Assertions
-
-googletest assertions are macros that resemble function calls. You test a class
-or function by making assertions about its behavior. When an assertion fails,
-googletest prints the assertion's source file and line number location, along
-with a failure message. You may also supply a custom failure message which will
-be appended to googletest's message.
-
-The assertions come in pairs that test the same thing but have different effects
-on the current function. `ASSERT_*` versions generate fatal failures when they
-fail, and **abort the current function**. `EXPECT_*` versions generate nonfatal
-failures, which don't abort the current function. Usually `EXPECT_*` are
-preferred, as they allow more than one failure to be reported in a test.
-However, you should use `ASSERT_*` if it doesn't make sense to continue when the
-assertion in question fails.
-
-Since a failed `ASSERT_*` returns from the current function immediately,
-possibly skipping clean-up code that comes after it, it may cause a space leak.
-Depending on the nature of the leak, it may or may not be worth fixing - so keep
-this in mind if you get a heap checker error in addition to assertion errors.
-
-To provide a custom failure message, simply stream it into the macro using the
-`<<` operator or a sequence of such operators. An example:
-
-```c++
-ASSERT_EQ(x.size(), y.size()) << "Vectors x and y are of unequal length";
-
-for (int i = 0; i < x.size(); ++i) {
-  EXPECT_EQ(x[i], y[i]) << "Vectors x and y differ at index " << i;
-}
-```
-
-Anything that can be streamed to an `ostream` can be streamed to an assertion
-macro--in particular, C strings and `string` objects. If a wide string
-(`wchar_t*`, `TCHAR*` in `UNICODE` mode on Windows, or `std::wstring`) is
-streamed to an assertion, it will be translated to UTF-8 when printed.
-
-### Basic Assertions
-
-These assertions do basic true/false condition testing.
-
-Fatal assertion            | Nonfatal assertion         | Verifies
--------------------------- | -------------------------- | --------------------
-`ASSERT_TRUE(condition);`  | `EXPECT_TRUE(condition);`  | `condition` is true
-`ASSERT_FALSE(condition);` | `EXPECT_FALSE(condition);` | `condition` is false
-
-Remember, when they fail, `ASSERT_*` yields a fatal failure and returns from the
-current function, while `EXPECT_*` yields a nonfatal failure, allowing the
-function to continue running. In either case, an assertion failure means its
-containing test fails.
-
-**Availability**: Linux, Windows, Mac.
-
-### Binary Comparison
-
-This section describes assertions that compare two values.
-
-Fatal assertion          | Nonfatal assertion       | Verifies
------------------------- | ------------------------ | --------------
-`ASSERT_EQ(val1, val2);` | `EXPECT_EQ(val1, val2);` | `val1 == val2`
-`ASSERT_NE(val1, val2);` | `EXPECT_NE(val1, val2);` | `val1 != val2`
-`ASSERT_LT(val1, val2);` | `EXPECT_LT(val1, val2);` | `val1 < val2`
-`ASSERT_LE(val1, val2);` | `EXPECT_LE(val1, val2);` | `val1 <= val2`
-`ASSERT_GT(val1, val2);` | `EXPECT_GT(val1, val2);` | `val1 > val2`
-`ASSERT_GE(val1, val2);` | `EXPECT_GE(val1, val2);` | `val1 >= val2`
-
-Value arguments must be comparable by the assertion's comparison operator or
-you'll get a compiler error. We used to require the arguments to support the
-`<<` operator for streaming to an `ostream`, but this is no longer necessary. If
-`<<` is supported, it will be called to print the arguments when the assertion
-fails; otherwise googletest will attempt to print them in the best way it can.
-For more details and how to customize the printing of the arguments, see the
-[documentation](../../googlemock/docs/cook_book.md#teaching-gmock-how-to-print-your-values).
-
-These assertions can work with a user-defined type, but only if you define the
-corresponding comparison operator (e.g., `==` or `<`). Since this is discouraged
-by the Google
-[C++ Style Guide](https://google.github.io/styleguide/cppguide.html#Operator_Overloading),
-you may need to use `ASSERT_TRUE()` or `EXPECT_TRUE()` to assert the equality of
-two objects of a user-defined type.
-
-However, when possible, `ASSERT_EQ(actual, expected)` is preferred to
-`ASSERT_TRUE(actual == expected)`, since it tells you `actual` and `expected`'s
-values on failure.
-
-Arguments are always evaluated exactly once. Therefore, it's OK for the
-arguments to have side effects. However, as with any ordinary C/C++ function,
-the arguments' evaluation order is undefined (i.e., the compiler is free to
-choose any order), and your code should not depend on any particular argument
-evaluation order.
-
-`ASSERT_EQ()` does pointer equality on pointers. If used on two C strings, it
-tests if they are in the same memory location, not if they have the same value.
-Therefore, if you want to compare C strings (e.g. `const char*`) by value, use
-`ASSERT_STREQ()`, which will be described later on. In particular, to assert
-that a C string is `NULL`, use `ASSERT_STREQ(c_string, NULL)`. Consider using
-`ASSERT_EQ(c_string, nullptr)` if c++11 is supported. To compare two `string`
-objects, you should use `ASSERT_EQ`.
-
-When doing pointer comparisons use `*_EQ(ptr, nullptr)` and `*_NE(ptr, nullptr)`
-instead of `*_EQ(ptr, NULL)` and `*_NE(ptr, NULL)`. This is because `nullptr` is
-typed, while `NULL` is not. See the [FAQ](faq.md) for more details.
-
-If you're working with floating point numbers, you may want to use the floating
-point variations of some of these macros in order to avoid problems caused by
-rounding. See [Advanced googletest Topics](advanced.md) for details.
-
-Macros in this section work with both narrow and wide string objects (`string`
-and `wstring`).
-
-**Availability**: Linux, Windows, Mac.
-
-**Historical note**: Before February 2016 `*_EQ` had a convention of calling it
-as `ASSERT_EQ(expected, actual)`, so lots of existing code uses this order. Now
-`*_EQ` treats both parameters in the same way.
-
-### String Comparison
-
-The assertions in this group compare two **C strings**. If you want to compare
-two `string` objects, use `EXPECT_EQ`, `EXPECT_NE`, and etc instead.
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-| Fatal assertion                | Nonfatal assertion             | Verifies                                                 |
-| --------------------------     | ------------------------------ | -------------------------------------------------------- |
-| `ASSERT_STREQ(str1,str2);`     | `EXPECT_STREQ(str1,str2);`     | the two C strings have the same content   		     |
-| `ASSERT_STRNE(str1,str2);`     | `EXPECT_STRNE(str1,str2);`     | the two C strings have different contents 		     |
-| `ASSERT_STRCASEEQ(str1,str2);` | `EXPECT_STRCASEEQ(str1,str2);` | the two C strings have the same content, ignoring case   |
-| `ASSERT_STRCASENE(str1,str2);` | `EXPECT_STRCASENE(str1,str2);` | the two C strings have different contents, ignoring case |
-
-<!-- mdformat on-->
-
-Note that "CASE" in an assertion name means that case is ignored. A `NULL`
-pointer and an empty string are considered *different*.
-
-`*STREQ*` and `*STRNE*` also accept wide C strings (`wchar_t*`). If a comparison
-of two wide strings fails, their values will be printed as UTF-8 narrow strings.
-
-**Availability**: Linux, Windows, Mac.
-
-**See also**: For more string comparison tricks (substring, prefix, suffix, and
-regular expression matching, for example), see [this](advanced.md) in the
-Advanced googletest Guide.
-
-## Simple Tests
-
-To create a test:
-
-1.  Use the `TEST()` macro to define and name a test function. These are
-    ordinary C++ functions that don't return a value.
-2.  In this function, along with any valid C++ statements you want to include,
-    use the various googletest assertions to check values.
-3.  The test's result is determined by the assertions; if any assertion in the
-    test fails (either fatally or non-fatally), or if the test crashes, the
-    entire test fails. Otherwise, it succeeds.
-
-```c++
-TEST(TestSuiteName, TestName) {
-  ... test body ...
-}
-```
-
-`TEST()` arguments go from general to specific. The *first* argument is the name
-of the test suite, and the *second* argument is the test's name within the test
-case. Both names must be valid C++ identifiers, and they should not contain
-any underscores (`_`). A test's *full name* consists of its containing test suite and
-its individual name. Tests from different test suites can have the same
-individual name.
-
-For example, let's take a simple integer function:
-
-```c++
-int Factorial(int n);  // Returns the factorial of n
-```
-
-A test suite for this function might look like:
-
-```c++
-// Tests factorial of 0.
-TEST(FactorialTest, HandlesZeroInput) {
-  EXPECT_EQ(Factorial(0), 1);
-}
-
-// Tests factorial of positive numbers.
-TEST(FactorialTest, HandlesPositiveInput) {
-  EXPECT_EQ(Factorial(1), 1);
-  EXPECT_EQ(Factorial(2), 2);
-  EXPECT_EQ(Factorial(3), 6);
-  EXPECT_EQ(Factorial(8), 40320);
-}
-```
-
-googletest groups the test results by test suites, so logically related tests
-should be in the same test suite; in other words, the first argument to their
-`TEST()` should be the same. In the above example, we have two tests,
-`HandlesZeroInput` and `HandlesPositiveInput`, that belong to the same test
-suite `FactorialTest`.
-
-When naming your test suites and tests, you should follow the same convention as
-for
-[naming functions and classes](https://google.github.io/styleguide/cppguide.html#Function_Names).
-
-**Availability**: Linux, Windows, Mac.
-
-## Test Fixtures: Using the Same Data Configuration for Multiple Tests {#same-data-multiple-tests}
-
-If you find yourself writing two or more tests that operate on similar data, you
-can use a *test fixture*. This allows you to reuse the same configuration of
-objects for several different tests.
-
-To create a fixture:
-
-1.  Derive a class from `::testing::Test` . Start its body with `protected:`, as
-    we'll want to access fixture members from sub-classes.
-2.  Inside the class, declare any objects you plan to use.
-3.  If necessary, write a default constructor or `SetUp()` function to prepare
-    the objects for each test. A common mistake is to spell `SetUp()` as
-    **`Setup()`** with a small `u` - Use `override` in C++11 to make sure you
-    spelled it correctly.
-4.  If necessary, write a destructor or `TearDown()` function to release any
-    resources you allocated in `SetUp()` . To learn when you should use the
-    constructor/destructor and when you should use `SetUp()/TearDown()`, read
-    the [FAQ](faq.md#CtorVsSetUp).
-5.  If needed, define subroutines for your tests to share.
-
-When using a fixture, use `TEST_F()` instead of `TEST()` as it allows you to
-access objects and subroutines in the test fixture:
-
-```c++
-TEST_F(TestFixtureName, TestName) {
-  ... test body ...
-}
-```
-
-Like `TEST()`, the first argument is the test suite name, but for `TEST_F()`
-this must be the name of the test fixture class. You've probably guessed: `_F`
-is for fixture.
-
-Unfortunately, the C++ macro system does not allow us to create a single macro
-that can handle both types of tests. Using the wrong macro causes a compiler
-error.
-
-Also, you must first define a test fixture class before using it in a
-`TEST_F()`, or you'll get the compiler error "`virtual outside class
-declaration`".
-
-For each test defined with `TEST_F()`, googletest will create a *fresh* test
-fixture at runtime, immediately initialize it via `SetUp()`, run the test,
-clean up by calling `TearDown()`, and then delete the test fixture. Note that
-different tests in the same test suite have different test fixture objects, and
-googletest always deletes a test fixture before it creates the next one.
-googletest does **not** reuse the same test fixture for multiple tests. Any
-changes one test makes to the fixture do not affect other tests.
-
-As an example, let's write tests for a FIFO queue class named `Queue`, which has
-the following interface:
-
-```c++
-template <typename E>  // E is the element type.
-class Queue {
- public:
-  Queue();
-  void Enqueue(const E& element);
-  E* Dequeue();  // Returns NULL if the queue is empty.
-  size_t size() const;
-  ...
-};
-```
-
-First, define a fixture class. By convention, you should give it the name
-`FooTest` where `Foo` is the class being tested.
-
-```c++
-class QueueTest : public ::testing::Test {
- protected:
-  void SetUp() override {
-     q1_.Enqueue(1);
-     q2_.Enqueue(2);
-     q2_.Enqueue(3);
-  }
-
-  // void TearDown() override {}
-
-  Queue<int> q0_;
-  Queue<int> q1_;
-  Queue<int> q2_;
-};
-```
-
-In this case, `TearDown()` is not needed since we don't have to clean up after
-each test, other than what's already done by the destructor.
-
-Now we'll write tests using `TEST_F()` and this fixture.
-
-```c++
-TEST_F(QueueTest, IsEmptyInitially) {
-  EXPECT_EQ(q0_.size(), 0);
-}
-
-TEST_F(QueueTest, DequeueWorks) {
-  int* n = q0_.Dequeue();
-  EXPECT_EQ(n, nullptr);
-
-  n = q1_.Dequeue();
-  ASSERT_NE(n, nullptr);
-  EXPECT_EQ(*n, 1);
-  EXPECT_EQ(q1_.size(), 0);
-  delete n;
-
-  n = q2_.Dequeue();
-  ASSERT_NE(n, nullptr);
-  EXPECT_EQ(*n, 2);
-  EXPECT_EQ(q2_.size(), 1);
-  delete n;
-}
-```
-
-The above uses both `ASSERT_*` and `EXPECT_*` assertions. The rule of thumb is
-to use `EXPECT_*` when you want the test to continue to reveal more errors after
-the assertion failure, and use `ASSERT_*` when continuing after failure doesn't
-make sense. For example, the second assertion in the `Dequeue` test is
-`ASSERT_NE(nullptr, n)`, as we need to dereference the pointer `n` later, which
-would lead to a segfault when `n` is `NULL`.
-
-When these tests run, the following happens:
-
-1.  googletest constructs a `QueueTest` object (let's call it `t1`).
-2.  `t1.SetUp()` initializes `t1`.
-3.  The first test (`IsEmptyInitially`) runs on `t1`.
-4.  `t1.TearDown()` cleans up after the test finishes.
-5.  `t1` is destructed.
-6.  The above steps are repeated on another `QueueTest` object, this time
-    running the `DequeueWorks` test.
-
-**Availability**: Linux, Windows, Mac.
-
-## Invoking the Tests
-
-`TEST()` and `TEST_F()` implicitly register their tests with googletest. So,
-unlike with many other C++ testing frameworks, you don't have to re-list all
-your defined tests in order to run them.
-
-After defining your tests, you can run them with `RUN_ALL_TESTS()`, which
-returns `0` if all the tests are successful, or `1` otherwise. Note that
-`RUN_ALL_TESTS()` runs *all tests* in your link unit--they can be from
-different test suites, or even different source files.
-
-When invoked, the `RUN_ALL_TESTS()` macro:
-
-*   Saves the state of all googletest flags.
-
-*   Creates a test fixture object for the first test.
-
-*   Initializes it via `SetUp()`.
-
-*   Runs the test on the fixture object.
-
-*   Cleans up the fixture via `TearDown()`.
-
-*   Deletes the fixture.
-
-*   Restores the state of all googletest flags.
-
-*   Repeats the above steps for the next test, until all tests have run.
-
-If a fatal failure happens the subsequent steps will be skipped.
-
-> IMPORTANT: You must **not** ignore the return value of `RUN_ALL_TESTS()`, or
-> you will get a compiler error. The rationale for this design is that the
-> automated testing service determines whether a test has passed based on its
-> exit code, not on its stdout/stderr output; thus your `main()` function must
-> return the value of `RUN_ALL_TESTS()`.
->
-> Also, you should call `RUN_ALL_TESTS()` only **once**. Calling it more than
-> once conflicts with some advanced googletest features (e.g., thread-safe
-> [death tests](advanced.md#death-tests)) and thus is not supported.
-
-**Availability**: Linux, Windows, Mac.
-
-## Writing the main() Function
-
-Write your own main() function, which should return the value of
-`RUN_ALL_TESTS()`.
-
-You can start from this boilerplate:
-
-```c++
-#include "this/package/foo.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-// The fixture for testing class Foo.
-class FooTest : public ::testing::Test {
- protected:
-  // You can remove any or all of the following functions if its body
-  // is empty.
-
-  FooTest() {
-     // You can do set-up work for each test here.
-  }
-
-  ~FooTest() override {
-     // You can do clean-up work that doesn't throw exceptions here.
-  }
-
-  // If the constructor and destructor are not enough for setting up
-  // and cleaning up each test, you can define the following methods:
-
-  void SetUp() override {
-     // Code here will be called immediately after the constructor (right
-     // before each test).
-  }
-
-  void TearDown() override {
-     // Code here will be called immediately after each test (right
-     // before the destructor).
-  }
-
-  // Objects declared here can be used by all tests in the test suite for Foo.
-};
-
-// Tests that the Foo::Bar() method does Abc.
-TEST_F(FooTest, MethodBarDoesAbc) {
-  const std::string input_filepath = "this/package/testdata/myinputfile.dat";
-  const std::string output_filepath = "this/package/testdata/myoutputfile.dat";
-  Foo f;
-  EXPECT_EQ(f.Bar(input_filepath, output_filepath), 0);
-}
-
-// Tests that Foo does Xyz.
-TEST_F(FooTest, DoesXyz) {
-  // Exercises the Xyz feature of Foo.
-}
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-```
-
-The `::testing::InitGoogleTest()` function parses the command line for
-googletest flags, and removes all recognized flags. This allows the user to
-control a test program's behavior via various flags, which we'll cover in
-the [AdvancedGuide](advanced.md). You **must** call this function before calling
-`RUN_ALL_TESTS()`, or the flags won't be properly initialized.
-
-On Windows, `InitGoogleTest()` also works with wide strings, so it can be used
-in programs compiled in `UNICODE` mode as well.
-
-But maybe you think that writing all those main() functions is too much work? We
-agree with you completely, and that's why Google Test provides a basic
-implementation of main(). If it fits your needs, then just link your test with
-gtest\_main library and you are good to go.
-
-NOTE: `ParseGUnitFlags()` is deprecated in favor of `InitGoogleTest()`.
-
-## Known Limitations
-
-*   Google Test is designed to be thread-safe. The implementation is thread-safe
-    on systems where the `pthreads` library is available. It is currently
-    _unsafe_ to use Google Test assertions from two threads concurrently on
-    other systems (e.g. Windows). In most tests this is not an issue as usually
-    the assertions are done in the main thread. If you want to help, you can
-    volunteer to implement the necessary synchronization primitives in
-    `gtest-port.h` for your platform.
diff --git a/3rdparty/gtest/docs/pump_manual.md b/3rdparty/gtest/docs/pump_manual.md
deleted file mode 100644
index 10b3c5ff..00000000
--- a/3rdparty/gtest/docs/pump_manual.md
+++ /dev/null
@@ -1,190 +0,0 @@
-<b>P</b>ump is <b>U</b>seful for <b>M</b>eta <b>P</b>rogramming.
-
-# The Problem
-
-Template and macro libraries often need to define many classes, functions, or
-macros that vary only (or almost only) in the number of arguments they take.
-It's a lot of repetitive, mechanical, and error-prone work.
-
-Variadic templates and variadic macros can alleviate the problem. However, while
-both are being considered by the C++ committee, neither is in the standard yet
-or widely supported by compilers. Thus they are often not a good choice,
-especially when your code needs to be portable. And their capabilities are still
-limited.
-
-As a result, authors of such libraries often have to write scripts to generate
-their implementation. However, our experience is that it's tedious to write such
-scripts, which tend to reflect the structure of the generated code poorly and
-are often hard to read and edit. For example, a small change needed in the
-generated code may require some non-intuitive, non-trivial changes in the
-script. This is especially painful when experimenting with the code.
-
-# Our Solution
-
-Pump (for Pump is Useful for Meta Programming, Pretty Useful for Meta
-Programming, or Practical Utility for Meta Programming, whichever you prefer) is
-a simple meta-programming tool for C++. The idea is that a programmer writes a
-`foo.pump` file which contains C++ code plus meta code that manipulates the C++
-code. The meta code can handle iterations over a range, nested iterations, local
-meta variable definitions, simple arithmetic, and conditional expressions. You
-can view it as a small Domain-Specific Language. The meta language is designed
-to be non-intrusive (s.t. it won't confuse Emacs' C++ mode, for example) and
-concise, making Pump code intuitive and easy to maintain.
-
-## Highlights
-
-*   The implementation is in a single Python script and thus ultra portable: no
-    build or installation is needed and it works cross platforms.
-*   Pump tries to be smart with respect to
-    [Google's style guide](https://github.com/google/styleguide): it breaks long
-    lines (easy to have when they are generated) at acceptable places to fit
-    within 80 columns and indent the continuation lines correctly.
-*   The format is human-readable and more concise than XML.
-*   The format works relatively well with Emacs' C++ mode.
-
-## Examples
-
-The following Pump code (where meta keywords start with `$`, `[[` and `]]` are
-meta brackets, and `$$` starts a meta comment that ends with the line):
-
-```
-$var n = 3     $$ Defines a meta variable n.
-$range i 0..n  $$ Declares the range of meta iterator i (inclusive).
-$for i [[
-               $$ Meta loop.
-// Foo$i does blah for $i-ary predicates.
-$range j 1..i
-template <size_t N $for j [[, typename A$j]]>
-class Foo$i {
-$if i == 0 [[
-  blah a;
-]] $elif i <= 2 [[
-  blah b;
-]] $else [[
-  blah c;
-]]
-};
-
-]]
-```
-
-will be translated by the Pump compiler to:
-
-```cpp
-// Foo0 does blah for 0-ary predicates.
-template <size_t N>
-class Foo0 {
-  blah a;
-};
-
-// Foo1 does blah for 1-ary predicates.
-template <size_t N, typename A1>
-class Foo1 {
-  blah b;
-};
-
-// Foo2 does blah for 2-ary predicates.
-template <size_t N, typename A1, typename A2>
-class Foo2 {
-  blah b;
-};
-
-// Foo3 does blah for 3-ary predicates.
-template <size_t N, typename A1, typename A2, typename A3>
-class Foo3 {
-  blah c;
-};
-```
-
-In another example,
-
-```
-$range i 1..n
-Func($for i + [[a$i]]);
-$$ The text between i and [[ is the separator between iterations.
-```
-
-will generate one of the following lines (without the comments), depending on
-the value of `n`:
-
-```cpp
-Func();              // If n is 0.
-Func(a1);            // If n is 1.
-Func(a1 + a2);       // If n is 2.
-Func(a1 + a2 + a3);  // If n is 3.
-// And so on...
-```
-
-## Constructs
-
-We support the following meta programming constructs:
-
-| `$var id = exp`                  | Defines a named constant value. `$id` is |
-:                                  : valid util the end of the current meta   :
-:                                  : lexical block.                           :
-| :------------------------------- | :--------------------------------------- |
-| `$range id exp..exp`             | Sets the range of an iteration variable, |
-:                                  : which can be reused in multiple loops    :
-:                                  : later.                                   :
-| `$for id sep [[ code ]]`         | Iteration. The range of `id` must have   |
-:                                  : been defined earlier. `$id` is valid in  :
-:                                  : `code`.                                  :
-| `$($)`                           | Generates a single `$` character.        |
-| `$id`                            | Value of the named constant or iteration |
-:                                  : variable.                                :
-| `$(exp)`                         | Value of the expression.                 |
-| `$if exp [[ code ]] else_branch` | Conditional.                             |
-| `[[ code ]]`                     | Meta lexical block.                      |
-| `cpp_code`                       | Raw C++ code.                            |
-| `$$ comment`                     | Meta comment.                            |
-
-**Note:** To give the user some freedom in formatting the Pump source code, Pump
-ignores a new-line character if it's right after `$for foo` or next to `[[` or
-`]]`. Without this rule you'll often be forced to write very long lines to get
-the desired output. Therefore sometimes you may need to insert an extra new-line
-in such places for a new-line to show up in your output.
-
-## Grammar
-
-```ebnf
-code ::= atomic_code*
-atomic_code ::= $var id = exp
-    | $var id = [[ code ]]
-    | $range id exp..exp
-    | $for id sep [[ code ]]
-    | $($)
-    | $id
-    | $(exp)
-    | $if exp [[ code ]] else_branch
-    | [[ code ]]
-    | cpp_code
-sep ::= cpp_code | empty_string
-else_branch ::= $else [[ code ]]
-    | $elif exp [[ code ]] else_branch
-    | empty_string
-exp ::= simple_expression_in_Python_syntax
-```
-
-## Code
-
-You can find the source code of Pump in [scripts/pump.py](../scripts/pump.py).
-It is still very unpolished and lacks automated tests, although it has been
-successfully used many times. If you find a chance to use it in your project,
-please let us know what you think! We also welcome help on improving Pump.
-
-## Real Examples
-
-You can find real-world applications of Pump in
-[Google Test](https://github.com/google/googletest/tree/master/googletest) and
-[Google Mock](https://github.com/google/googletest/tree/master/googlemock). The
-source file `foo.h.pump` generates `foo.h`.
-
-## Tips
-
-*   If a meta variable is followed by a letter or digit, you can separate them
-    using `[[]]`, which inserts an empty string. For example `Foo$j[[]]Helper`
-    generate `Foo1Helper` when `j` is 1.
-*   To avoid extra-long Pump source lines, you can break a line anywhere you
-    want by inserting `[[]]` followed by a new line. Since any new-line
-    character next to `[[` or `]]` is ignored, the generated code won't contain
-    this new line.
diff --git a/3rdparty/gtest/docs/samples.md b/3rdparty/gtest/docs/samples.md
deleted file mode 100644
index aaa58838..00000000
--- a/3rdparty/gtest/docs/samples.md
+++ /dev/null
@@ -1,22 +0,0 @@
-# Googletest Samples {#samples}
-
-If you're like us, you'd like to look at
-[googletest samples.](https://github.com/google/googletest/tree/master/googletest/samples)
-The sample directory has a number of well-commented samples showing how to use a
-variety of googletest features.
-
-*   Sample #1 shows the basic steps of using googletest to test C++ functions.
-*   Sample #2 shows a more complex unit test for a class with multiple member
-    functions.
-*   Sample #3 uses a test fixture.
-*   Sample #4 teaches you how to use googletest and `googletest.h` together to
-    get the best of both libraries.
-*   Sample #5 puts shared testing logic in a base test fixture, and reuses it in
-    derived fixtures.
-*   Sample #6 demonstrates type-parameterized tests.
-*   Sample #7 teaches the basics of value-parameterized tests.
-*   Sample #8 shows using `Combine()` in value-parameterized tests.
-*   Sample #9 shows use of the listener API to modify Google Test's console
-    output and the use of its reflection API to inspect test results.
-*   Sample #10 shows use of the listener API to implement a primitive memory
-    leak checker.
diff --git a/3rdparty/gtest/include/gtest/gtest-death-test.h b/3rdparty/gtest/include/gtest/gtest-death-test.h
deleted file mode 100644
index dc878ffb..00000000
--- a/3rdparty/gtest/include/gtest/gtest-death-test.h
+++ /dev/null
@@ -1,343 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the public API for death tests.  It is
-// #included by gtest.h so a user doesn't need to include this
-// directly.
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
-#define GTEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
-
-#include "gtest/internal/gtest-death-test-internal.h"
-
-namespace testing {
-
-// This flag controls the style of death tests.  Valid values are "threadsafe",
-// meaning that the death test child process will re-execute the test binary
-// from the start, running only a single death test, or "fast",
-// meaning that the child process will execute the test logic immediately
-// after forking.
-GTEST_DECLARE_string_(death_test_style);
-
-#if GTEST_HAS_DEATH_TEST
-
-namespace internal {
-
-// Returns a Boolean value indicating whether the caller is currently
-// executing in the context of the death test child process.  Tools such as
-// Valgrind heap checkers may need this to modify their behavior in death
-// tests.  IMPORTANT: This is an internal utility.  Using it may break the
-// implementation of death tests.  User code MUST NOT use it.
-GTEST_API_ bool InDeathTestChild();
-
-}  // namespace internal
-
-// The following macros are useful for writing death tests.
-
-// Here's what happens when an ASSERT_DEATH* or EXPECT_DEATH* is
-// executed:
-//
-//   1. It generates a warning if there is more than one active
-//   thread.  This is because it's safe to fork() or clone() only
-//   when there is a single thread.
-//
-//   2. The parent process clone()s a sub-process and runs the death
-//   test in it; the sub-process exits with code 0 at the end of the
-//   death test, if it hasn't exited already.
-//
-//   3. The parent process waits for the sub-process to terminate.
-//
-//   4. The parent process checks the exit code and error message of
-//   the sub-process.
-//
-// Examples:
-//
-//   ASSERT_DEATH(server.SendMessage(56, "Hello"), "Invalid port number");
-//   for (int i = 0; i < 5; i++) {
-//     EXPECT_DEATH(server.ProcessRequest(i),
-//                  "Invalid request .* in ProcessRequest()")
-//                  << "Failed to die on request " << i;
-//   }
-//
-//   ASSERT_EXIT(server.ExitNow(), ::testing::ExitedWithCode(0), "Exiting");
-//
-//   bool KilledBySIGHUP(int exit_code) {
-//     return WIFSIGNALED(exit_code) && WTERMSIG(exit_code) == SIGHUP;
-//   }
-//
-//   ASSERT_EXIT(client.HangUpServer(), KilledBySIGHUP, "Hanging up!");
-//
-// On the regular expressions used in death tests:
-//
-//   GOOGLETEST_CM0005 DO NOT DELETE
-//   On POSIX-compliant systems (*nix), we use the <regex.h> library,
-//   which uses the POSIX extended regex syntax.
-//
-//   On other platforms (e.g. Windows or Mac), we only support a simple regex
-//   syntax implemented as part of Google Test.  This limited
-//   implementation should be enough most of the time when writing
-//   death tests; though it lacks many features you can find in PCRE
-//   or POSIX extended regex syntax.  For example, we don't support
-//   union ("x|y"), grouping ("(xy)"), brackets ("[xy]"), and
-//   repetition count ("x{5,7}"), among others.
-//
-//   Below is the syntax that we do support.  We chose it to be a
-//   subset of both PCRE and POSIX extended regex, so it's easy to
-//   learn wherever you come from.  In the following: 'A' denotes a
-//   literal character, period (.), or a single \\ escape sequence;
-//   'x' and 'y' denote regular expressions; 'm' and 'n' are for
-//   natural numbers.
-//
-//     c     matches any literal character c
-//     \\d   matches any decimal digit
-//     \\D   matches any character that's not a decimal digit
-//     \\f   matches \f
-//     \\n   matches \n
-//     \\r   matches \r
-//     \\s   matches any ASCII whitespace, including \n
-//     \\S   matches any character that's not a whitespace
-//     \\t   matches \t
-//     \\v   matches \v
-//     \\w   matches any letter, _, or decimal digit
-//     \\W   matches any character that \\w doesn't match
-//     \\c   matches any literal character c, which must be a punctuation
-//     .     matches any single character except \n
-//     A?    matches 0 or 1 occurrences of A
-//     A*    matches 0 or many occurrences of A
-//     A+    matches 1 or many occurrences of A
-//     ^     matches the beginning of a string (not that of each line)
-//     $     matches the end of a string (not that of each line)
-//     xy    matches x followed by y
-//
-//   If you accidentally use PCRE or POSIX extended regex features
-//   not implemented by us, you will get a run-time failure.  In that
-//   case, please try to rewrite your regular expression within the
-//   above syntax.
-//
-//   This implementation is *not* meant to be as highly tuned or robust
-//   as a compiled regex library, but should perform well enough for a
-//   death test, which already incurs significant overhead by launching
-//   a child process.
-//
-// Known caveats:
-//
-//   A "threadsafe" style death test obtains the path to the test
-//   program from argv[0] and re-executes it in the sub-process.  For
-//   simplicity, the current implementation doesn't search the PATH
-//   when launching the sub-process.  This means that the user must
-//   invoke the test program via a path that contains at least one
-//   path separator (e.g. path/to/foo_test and
-//   /absolute/path/to/bar_test are fine, but foo_test is not).  This
-//   is rarely a problem as people usually don't put the test binary
-//   directory in PATH.
-//
-
-// Asserts that a given statement causes the program to exit, with an
-// integer exit status that satisfies predicate, and emitting error output
-// that matches regex.
-# define ASSERT_EXIT(statement, predicate, regex) \
-    GTEST_DEATH_TEST_(statement, predicate, regex, GTEST_FATAL_FAILURE_)
-
-// Like ASSERT_EXIT, but continues on to successive tests in the
-// test suite, if any:
-# define EXPECT_EXIT(statement, predicate, regex) \
-    GTEST_DEATH_TEST_(statement, predicate, regex, GTEST_NONFATAL_FAILURE_)
-
-// Asserts that a given statement causes the program to exit, either by
-// explicitly exiting with a nonzero exit code or being killed by a
-// signal, and emitting error output that matches regex.
-# define ASSERT_DEATH(statement, regex) \
-    ASSERT_EXIT(statement, ::testing::internal::ExitedUnsuccessfully, regex)
-
-// Like ASSERT_DEATH, but continues on to successive tests in the
-// test suite, if any:
-# define EXPECT_DEATH(statement, regex) \
-    EXPECT_EXIT(statement, ::testing::internal::ExitedUnsuccessfully, regex)
-
-// Two predicate classes that can be used in {ASSERT,EXPECT}_EXIT*:
-
-// Tests that an exit code describes a normal exit with a given exit code.
-class GTEST_API_ ExitedWithCode {
- public:
-  explicit ExitedWithCode(int exit_code);
-  bool operator()(int exit_status) const;
- private:
-  // No implementation - assignment is unsupported.
-  void operator=(const ExitedWithCode& other);
-
-  const int exit_code_;
-};
-
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-// Tests that an exit code describes an exit due to termination by a
-// given signal.
-// GOOGLETEST_CM0006 DO NOT DELETE
-class GTEST_API_ KilledBySignal {
- public:
-  explicit KilledBySignal(int signum);
-  bool operator()(int exit_status) const;
- private:
-  const int signum_;
-};
-# endif  // !GTEST_OS_WINDOWS
-
-// EXPECT_DEBUG_DEATH asserts that the given statements die in debug mode.
-// The death testing framework causes this to have interesting semantics,
-// since the sideeffects of the call are only visible in opt mode, and not
-// in debug mode.
-//
-// In practice, this can be used to test functions that utilize the
-// LOG(DFATAL) macro using the following style:
-//
-// int DieInDebugOr12(int* sideeffect) {
-//   if (sideeffect) {
-//     *sideeffect = 12;
-//   }
-//   LOG(DFATAL) << "death";
-//   return 12;
-// }
-//
-// TEST(TestSuite, TestDieOr12WorksInDgbAndOpt) {
-//   int sideeffect = 0;
-//   // Only asserts in dbg.
-//   EXPECT_DEBUG_DEATH(DieInDebugOr12(&sideeffect), "death");
-//
-// #ifdef NDEBUG
-//   // opt-mode has sideeffect visible.
-//   EXPECT_EQ(12, sideeffect);
-// #else
-//   // dbg-mode no visible sideeffect.
-//   EXPECT_EQ(0, sideeffect);
-// #endif
-// }
-//
-// This will assert that DieInDebugReturn12InOpt() crashes in debug
-// mode, usually due to a DCHECK or LOG(DFATAL), but returns the
-// appropriate fallback value (12 in this case) in opt mode. If you
-// need to test that a function has appropriate side-effects in opt
-// mode, include assertions against the side-effects.  A general
-// pattern for this is:
-//
-// EXPECT_DEBUG_DEATH({
-//   // Side-effects here will have an effect after this statement in
-//   // opt mode, but none in debug mode.
-//   EXPECT_EQ(12, DieInDebugOr12(&sideeffect));
-// }, "death");
-//
-# ifdef NDEBUG
-
-#  define EXPECT_DEBUG_DEATH(statement, regex) \
-  GTEST_EXECUTE_STATEMENT_(statement, regex)
-
-#  define ASSERT_DEBUG_DEATH(statement, regex) \
-  GTEST_EXECUTE_STATEMENT_(statement, regex)
-
-# else
-
-#  define EXPECT_DEBUG_DEATH(statement, regex) \
-  EXPECT_DEATH(statement, regex)
-
-#  define ASSERT_DEBUG_DEATH(statement, regex) \
-  ASSERT_DEATH(statement, regex)
-
-# endif  // NDEBUG for EXPECT_DEBUG_DEATH
-#endif  // GTEST_HAS_DEATH_TEST
-
-// This macro is used for implementing macros such as
-// EXPECT_DEATH_IF_SUPPORTED and ASSERT_DEATH_IF_SUPPORTED on systems where
-// death tests are not supported. Those macros must compile on such systems
-// if and only if EXPECT_DEATH and ASSERT_DEATH compile with the same parameters
-// on systems that support death tests. This allows one to write such a macro on
-// a system that does not support death tests and be sure that it will compile
-// on a death-test supporting system. It is exposed publicly so that systems
-// that have death-tests with stricter requirements than GTEST_HAS_DEATH_TEST
-// can write their own equivalent of EXPECT_DEATH_IF_SUPPORTED and
-// ASSERT_DEATH_IF_SUPPORTED.
-//
-// Parameters:
-//   statement -  A statement that a macro such as EXPECT_DEATH would test
-//                for program termination. This macro has to make sure this
-//                statement is compiled but not executed, to ensure that
-//                EXPECT_DEATH_IF_SUPPORTED compiles with a certain
-//                parameter if and only if EXPECT_DEATH compiles with it.
-//   regex     -  A regex that a macro such as EXPECT_DEATH would use to test
-//                the output of statement.  This parameter has to be
-//                compiled but not evaluated by this macro, to ensure that
-//                this macro only accepts expressions that a macro such as
-//                EXPECT_DEATH would accept.
-//   terminator - Must be an empty statement for EXPECT_DEATH_IF_SUPPORTED
-//                and a return statement for ASSERT_DEATH_IF_SUPPORTED.
-//                This ensures that ASSERT_DEATH_IF_SUPPORTED will not
-//                compile inside functions where ASSERT_DEATH doesn't
-//                compile.
-//
-//  The branch that has an always false condition is used to ensure that
-//  statement and regex are compiled (and thus syntactically correct) but
-//  never executed. The unreachable code macro protects the terminator
-//  statement from generating an 'unreachable code' warning in case
-//  statement unconditionally returns or throws. The Message constructor at
-//  the end allows the syntax of streaming additional messages into the
-//  macro, for compilational compatibility with EXPECT_DEATH/ASSERT_DEATH.
-# define GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, terminator) \
-    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-    if (::testing::internal::AlwaysTrue()) { \
-      GTEST_LOG_(WARNING) \
-          << "Death tests are not supported on this platform.\n" \
-          << "Statement '" #statement "' cannot be verified."; \
-    } else if (::testing::internal::AlwaysFalse()) { \
-      ::testing::internal::RE::PartialMatch(".*", (regex)); \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-      terminator; \
-    } else \
-      ::testing::Message()
-
-// EXPECT_DEATH_IF_SUPPORTED(statement, regex) and
-// ASSERT_DEATH_IF_SUPPORTED(statement, regex) expand to real death tests if
-// death tests are supported; otherwise they just issue a warning.  This is
-// useful when you are combining death test assertions with normal test
-// assertions in one test.
-#if GTEST_HAS_DEATH_TEST
-# define EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
-    EXPECT_DEATH(statement, regex)
-# define ASSERT_DEATH_IF_SUPPORTED(statement, regex) \
-    ASSERT_DEATH(statement, regex)
-#else
-# define EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
-    GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, )
-# define ASSERT_DEATH_IF_SUPPORTED(statement, regex) \
-    GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, return)
-#endif
-
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-matchers.h b/3rdparty/gtest/include/gtest/gtest-matchers.h
deleted file mode 100644
index 9de6c2e1..00000000
--- a/3rdparty/gtest/include/gtest/gtest-matchers.h
+++ /dev/null
@@ -1,750 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file implements just enough of the matcher interface to allow
-// EXPECT_DEATH and friends to accept a matcher argument.
-
-// IWYU pragma: private, include "testing/base/public/gunit.h"
-// IWYU pragma: friend third_party/googletest/googlemock/.*
-// IWYU pragma: friend third_party/googletest/googletest/.*
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
-#define GTEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
-
-#include <memory>
-#include <ostream>
-#include <string>
-#include <type_traits>
-
-#include "gtest/gtest-printers.h"
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-port.h"
-
-// MSVC warning C5046 is new as of VS2017 version 15.8.
-#if defined(_MSC_VER) && _MSC_VER >= 1915
-#define GTEST_MAYBE_5046_ 5046
-#else
-#define GTEST_MAYBE_5046_
-#endif
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(
-    4251 GTEST_MAYBE_5046_ /* class A needs to have dll-interface to be used by
-                              clients of class B */
-    /* Symbol involving type with internal linkage not defined */)
-
-namespace testing {
-
-// To implement a matcher Foo for type T, define:
-//   1. a class FooMatcherImpl that implements the
-//      MatcherInterface<T> interface, and
-//   2. a factory function that creates a Matcher<T> object from a
-//      FooMatcherImpl*.
-//
-// The two-level delegation design makes it possible to allow a user
-// to write "v" instead of "Eq(v)" where a Matcher is expected, which
-// is impossible if we pass matchers by pointers.  It also eases
-// ownership management as Matcher objects can now be copied like
-// plain values.
-
-// MatchResultListener is an abstract class.  Its << operator can be
-// used by a matcher to explain why a value matches or doesn't match.
-//
-class MatchResultListener {
- public:
-  // Creates a listener object with the given underlying ostream.  The
-  // listener does not own the ostream, and does not dereference it
-  // in the constructor or destructor.
-  explicit MatchResultListener(::std::ostream* os) : stream_(os) {}
-  virtual ~MatchResultListener() = 0;  // Makes this class abstract.
-
-  // Streams x to the underlying ostream; does nothing if the ostream
-  // is NULL.
-  template <typename T>
-  MatchResultListener& operator<<(const T& x) {
-    if (stream_ != nullptr) *stream_ << x;
-    return *this;
-  }
-
-  // Returns the underlying ostream.
-  ::std::ostream* stream() { return stream_; }
-
-  // Returns true if and only if the listener is interested in an explanation
-  // of the match result.  A matcher's MatchAndExplain() method can use
-  // this information to avoid generating the explanation when no one
-  // intends to hear it.
-  bool IsInterested() const { return stream_ != nullptr; }
-
- private:
-  ::std::ostream* const stream_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MatchResultListener);
-};
-
-inline MatchResultListener::~MatchResultListener() {
-}
-
-// An instance of a subclass of this knows how to describe itself as a
-// matcher.
-class MatcherDescriberInterface {
- public:
-  virtual ~MatcherDescriberInterface() {}
-
-  // Describes this matcher to an ostream.  The function should print
-  // a verb phrase that describes the property a value matching this
-  // matcher should have.  The subject of the verb phrase is the value
-  // being matched.  For example, the DescribeTo() method of the Gt(7)
-  // matcher prints "is greater than 7".
-  virtual void DescribeTo(::std::ostream* os) const = 0;
-
-  // Describes the negation of this matcher to an ostream.  For
-  // example, if the description of this matcher is "is greater than
-  // 7", the negated description could be "is not greater than 7".
-  // You are not required to override this when implementing
-  // MatcherInterface, but it is highly advised so that your matcher
-  // can produce good error messages.
-  virtual void DescribeNegationTo(::std::ostream* os) const {
-    *os << "not (";
-    DescribeTo(os);
-    *os << ")";
-  }
-};
-
-// The implementation of a matcher.
-template <typename T>
-class MatcherInterface : public MatcherDescriberInterface {
- public:
-  // Returns true if and only if the matcher matches x; also explains the
-  // match result to 'listener' if necessary (see the next paragraph), in
-  // the form of a non-restrictive relative clause ("which ...",
-  // "whose ...", etc) that describes x.  For example, the
-  // MatchAndExplain() method of the Pointee(...) matcher should
-  // generate an explanation like "which points to ...".
-  //
-  // Implementations of MatchAndExplain() should add an explanation of
-  // the match result *if and only if* they can provide additional
-  // information that's not already present (or not obvious) in the
-  // print-out of x and the matcher's description.  Whether the match
-  // succeeds is not a factor in deciding whether an explanation is
-  // needed, as sometimes the caller needs to print a failure message
-  // when the match succeeds (e.g. when the matcher is used inside
-  // Not()).
-  //
-  // For example, a "has at least 10 elements" matcher should explain
-  // what the actual element count is, regardless of the match result,
-  // as it is useful information to the reader; on the other hand, an
-  // "is empty" matcher probably only needs to explain what the actual
-  // size is when the match fails, as it's redundant to say that the
-  // size is 0 when the value is already known to be empty.
-  //
-  // You should override this method when defining a new matcher.
-  //
-  // It's the responsibility of the caller (Google Test) to guarantee
-  // that 'listener' is not NULL.  This helps to simplify a matcher's
-  // implementation when it doesn't care about the performance, as it
-  // can talk to 'listener' without checking its validity first.
-  // However, in order to implement dummy listeners efficiently,
-  // listener->stream() may be NULL.
-  virtual bool MatchAndExplain(T x, MatchResultListener* listener) const = 0;
-
-  // Inherits these methods from MatcherDescriberInterface:
-  //   virtual void DescribeTo(::std::ostream* os) const = 0;
-  //   virtual void DescribeNegationTo(::std::ostream* os) const;
-};
-
-namespace internal {
-
-// Converts a MatcherInterface<T> to a MatcherInterface<const T&>.
-template <typename T>
-class MatcherInterfaceAdapter : public MatcherInterface<const T&> {
- public:
-  explicit MatcherInterfaceAdapter(const MatcherInterface<T>* impl)
-      : impl_(impl) {}
-  ~MatcherInterfaceAdapter() override { delete impl_; }
-
-  void DescribeTo(::std::ostream* os) const override { impl_->DescribeTo(os); }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    impl_->DescribeNegationTo(os);
-  }
-
-  bool MatchAndExplain(const T& x,
-                       MatchResultListener* listener) const override {
-    return impl_->MatchAndExplain(x, listener);
-  }
-
- private:
-  const MatcherInterface<T>* const impl_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MatcherInterfaceAdapter);
-};
-
-struct AnyEq {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a == b; }
-};
-struct AnyNe {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a != b; }
-};
-struct AnyLt {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a < b; }
-};
-struct AnyGt {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a > b; }
-};
-struct AnyLe {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a <= b; }
-};
-struct AnyGe {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a >= b; }
-};
-
-// A match result listener that ignores the explanation.
-class DummyMatchResultListener : public MatchResultListener {
- public:
-  DummyMatchResultListener() : MatchResultListener(nullptr) {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DummyMatchResultListener);
-};
-
-// A match result listener that forwards the explanation to a given
-// ostream.  The difference between this and MatchResultListener is
-// that the former is concrete.
-class StreamMatchResultListener : public MatchResultListener {
- public:
-  explicit StreamMatchResultListener(::std::ostream* os)
-      : MatchResultListener(os) {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(StreamMatchResultListener);
-};
-
-// An internal class for implementing Matcher<T>, which will derive
-// from it.  We put functionalities common to all Matcher<T>
-// specializations here to avoid code duplication.
-template <typename T>
-class MatcherBase {
- public:
-  // Returns true if and only if the matcher matches x; also explains the
-  // match result to 'listener'.
-  bool MatchAndExplain(const T& x, MatchResultListener* listener) const {
-    return impl_->MatchAndExplain(x, listener);
-  }
-
-  // Returns true if and only if this matcher matches x.
-  bool Matches(const T& x) const {
-    DummyMatchResultListener dummy;
-    return MatchAndExplain(x, &dummy);
-  }
-
-  // Describes this matcher to an ostream.
-  void DescribeTo(::std::ostream* os) const { impl_->DescribeTo(os); }
-
-  // Describes the negation of this matcher to an ostream.
-  void DescribeNegationTo(::std::ostream* os) const {
-    impl_->DescribeNegationTo(os);
-  }
-
-  // Explains why x matches, or doesn't match, the matcher.
-  void ExplainMatchResultTo(const T& x, ::std::ostream* os) const {
-    StreamMatchResultListener listener(os);
-    MatchAndExplain(x, &listener);
-  }
-
-  // Returns the describer for this matcher object; retains ownership
-  // of the describer, which is only guaranteed to be alive when
-  // this matcher object is alive.
-  const MatcherDescriberInterface* GetDescriber() const {
-    return impl_.get();
-  }
-
- protected:
-  MatcherBase() {}
-
-  // Constructs a matcher from its implementation.
-  explicit MatcherBase(const MatcherInterface<const T&>* impl) : impl_(impl) {}
-
-  template <typename U>
-  explicit MatcherBase(
-      const MatcherInterface<U>* impl,
-      typename std::enable_if<!std::is_same<U, const U&>::value>::type* =
-          nullptr)
-      : impl_(new internal::MatcherInterfaceAdapter<U>(impl)) {}
-
-  MatcherBase(const MatcherBase&) = default;
-  MatcherBase& operator=(const MatcherBase&) = default;
-  MatcherBase(MatcherBase&&) = default;
-  MatcherBase& operator=(MatcherBase&&) = default;
-
-  virtual ~MatcherBase() {}
-
- private:
-  std::shared_ptr<const MatcherInterface<const T&>> impl_;
-};
-
-}  // namespace internal
-
-// A Matcher<T> is a copyable and IMMUTABLE (except by assignment)
-// object that can check whether a value of type T matches.  The
-// implementation of Matcher<T> is just a std::shared_ptr to const
-// MatcherInterface<T>.  Don't inherit from Matcher!
-template <typename T>
-class Matcher : public internal::MatcherBase<T> {
- public:
-  // Constructs a null matcher.  Needed for storing Matcher objects in STL
-  // containers.  A default-constructed matcher is not yet initialized.  You
-  // cannot use it until a valid value has been assigned to it.
-  explicit Matcher() {}  // NOLINT
-
-  // Constructs a matcher from its implementation.
-  explicit Matcher(const MatcherInterface<const T&>* impl)
-      : internal::MatcherBase<T>(impl) {}
-
-  template <typename U>
-  explicit Matcher(
-      const MatcherInterface<U>* impl,
-      typename std::enable_if<!std::is_same<U, const U&>::value>::type* =
-          nullptr)
-      : internal::MatcherBase<T>(impl) {}
-
-  // Implicit constructor here allows people to write
-  // EXPECT_CALL(foo, Bar(5)) instead of EXPECT_CALL(foo, Bar(Eq(5))) sometimes
-  Matcher(T value);  // NOLINT
-};
-
-// The following two specializations allow the user to write str
-// instead of Eq(str) and "foo" instead of Eq("foo") when a std::string
-// matcher is expected.
-template <>
-class GTEST_API_ Matcher<const std::string&>
-    : public internal::MatcherBase<const std::string&> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const std::string&>* impl)
-      : internal::MatcherBase<const std::string&>(impl) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a std::string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-};
-
-template <>
-class GTEST_API_ Matcher<std::string>
-    : public internal::MatcherBase<std::string> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const std::string&>* impl)
-      : internal::MatcherBase<std::string>(impl) {}
-  explicit Matcher(const MatcherInterface<std::string>* impl)
-      : internal::MatcherBase<std::string>(impl) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-};
-
-#if GTEST_HAS_ABSL
-// The following two specializations allow the user to write str
-// instead of Eq(str) and "foo" instead of Eq("foo") when a absl::string_view
-// matcher is expected.
-template <>
-class GTEST_API_ Matcher<const absl::string_view&>
-    : public internal::MatcherBase<const absl::string_view&> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const absl::string_view&>* impl)
-      : internal::MatcherBase<const absl::string_view&>(impl) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a std::string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-
-  // Allows the user to pass absl::string_views directly.
-  Matcher(absl::string_view s);  // NOLINT
-};
-
-template <>
-class GTEST_API_ Matcher<absl::string_view>
-    : public internal::MatcherBase<absl::string_view> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const absl::string_view&>* impl)
-      : internal::MatcherBase<absl::string_view>(impl) {}
-  explicit Matcher(const MatcherInterface<absl::string_view>* impl)
-      : internal::MatcherBase<absl::string_view>(impl) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a std::string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-
-  // Allows the user to pass absl::string_views directly.
-  Matcher(absl::string_view s);  // NOLINT
-};
-#endif  // GTEST_HAS_ABSL
-
-// Prints a matcher in a human-readable format.
-template <typename T>
-std::ostream& operator<<(std::ostream& os, const Matcher<T>& matcher) {
-  matcher.DescribeTo(&os);
-  return os;
-}
-
-// The PolymorphicMatcher class template makes it easy to implement a
-// polymorphic matcher (i.e. a matcher that can match values of more
-// than one type, e.g. Eq(n) and NotNull()).
-//
-// To define a polymorphic matcher, a user should provide an Impl
-// class that has a DescribeTo() method and a DescribeNegationTo()
-// method, and define a member function (or member function template)
-//
-//   bool MatchAndExplain(const Value& value,
-//                        MatchResultListener* listener) const;
-//
-// See the definition of NotNull() for a complete example.
-template <class Impl>
-class PolymorphicMatcher {
- public:
-  explicit PolymorphicMatcher(const Impl& an_impl) : impl_(an_impl) {}
-
-  // Returns a mutable reference to the underlying matcher
-  // implementation object.
-  Impl& mutable_impl() { return impl_; }
-
-  // Returns an immutable reference to the underlying matcher
-  // implementation object.
-  const Impl& impl() const { return impl_; }
-
-  template <typename T>
-  operator Matcher<T>() const {
-    return Matcher<T>(new MonomorphicImpl<const T&>(impl_));
-  }
-
- private:
-  template <typename T>
-  class MonomorphicImpl : public MatcherInterface<T> {
-   public:
-    explicit MonomorphicImpl(const Impl& impl) : impl_(impl) {}
-
-    virtual void DescribeTo(::std::ostream* os) const { impl_.DescribeTo(os); }
-
-    virtual void DescribeNegationTo(::std::ostream* os) const {
-      impl_.DescribeNegationTo(os);
-    }
-
-    virtual bool MatchAndExplain(T x, MatchResultListener* listener) const {
-      return impl_.MatchAndExplain(x, listener);
-    }
-
-   private:
-    const Impl impl_;
-  };
-
-  Impl impl_;
-};
-
-// Creates a matcher from its implementation.
-// DEPRECATED: Especially in the generic code, prefer:
-//   Matcher<T>(new MyMatcherImpl<const T&>(...));
-//
-// MakeMatcher may create a Matcher that accepts its argument by value, which
-// leads to unnecessary copies & lack of support for non-copyable types.
-template <typename T>
-inline Matcher<T> MakeMatcher(const MatcherInterface<T>* impl) {
-  return Matcher<T>(impl);
-}
-
-// Creates a polymorphic matcher from its implementation.  This is
-// easier to use than the PolymorphicMatcher<Impl> constructor as it
-// doesn't require you to explicitly write the template argument, e.g.
-//
-//   MakePolymorphicMatcher(foo);
-// vs
-//   PolymorphicMatcher<TypeOfFoo>(foo);
-template <class Impl>
-inline PolymorphicMatcher<Impl> MakePolymorphicMatcher(const Impl& impl) {
-  return PolymorphicMatcher<Impl>(impl);
-}
-
-namespace internal {
-// Implements a matcher that compares a given value with a
-// pre-supplied value using one of the ==, <=, <, etc, operators.  The
-// two values being compared don't have to have the same type.
-//
-// The matcher defined here is polymorphic (for example, Eq(5) can be
-// used to match an int, a short, a double, etc).  Therefore we use
-// a template type conversion operator in the implementation.
-//
-// The following template definition assumes that the Rhs parameter is
-// a "bare" type (i.e. neither 'const T' nor 'T&').
-template <typename D, typename Rhs, typename Op>
-class ComparisonBase {
- public:
-  explicit ComparisonBase(const Rhs& rhs) : rhs_(rhs) {}
-  template <typename Lhs>
-  operator Matcher<Lhs>() const {
-    return Matcher<Lhs>(new Impl<const Lhs&>(rhs_));
-  }
-
- private:
-  template <typename T>
-  static const T& Unwrap(const T& v) { return v; }
-  template <typename T>
-  static const T& Unwrap(std::reference_wrapper<T> v) { return v; }
-
-  template <typename Lhs, typename = Rhs>
-  class Impl : public MatcherInterface<Lhs> {
-   public:
-    explicit Impl(const Rhs& rhs) : rhs_(rhs) {}
-    bool MatchAndExplain(Lhs lhs,
-                         MatchResultListener* /* listener */) const override {
-      return Op()(lhs, Unwrap(rhs_));
-    }
-    void DescribeTo(::std::ostream* os) const override {
-      *os << D::Desc() << " ";
-      UniversalPrint(Unwrap(rhs_), os);
-    }
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << D::NegatedDesc() <<  " ";
-      UniversalPrint(Unwrap(rhs_), os);
-    }
-
-   private:
-    Rhs rhs_;
-  };
-  Rhs rhs_;
-};
-
-template <typename Rhs>
-class EqMatcher : public ComparisonBase<EqMatcher<Rhs>, Rhs, AnyEq> {
- public:
-  explicit EqMatcher(const Rhs& rhs)
-      : ComparisonBase<EqMatcher<Rhs>, Rhs, AnyEq>(rhs) { }
-  static const char* Desc() { return "is equal to"; }
-  static const char* NegatedDesc() { return "isn't equal to"; }
-};
-template <typename Rhs>
-class NeMatcher : public ComparisonBase<NeMatcher<Rhs>, Rhs, AnyNe> {
- public:
-  explicit NeMatcher(const Rhs& rhs)
-      : ComparisonBase<NeMatcher<Rhs>, Rhs, AnyNe>(rhs) { }
-  static const char* Desc() { return "isn't equal to"; }
-  static const char* NegatedDesc() { return "is equal to"; }
-};
-template <typename Rhs>
-class LtMatcher : public ComparisonBase<LtMatcher<Rhs>, Rhs, AnyLt> {
- public:
-  explicit LtMatcher(const Rhs& rhs)
-      : ComparisonBase<LtMatcher<Rhs>, Rhs, AnyLt>(rhs) { }
-  static const char* Desc() { return "is <"; }
-  static const char* NegatedDesc() { return "isn't <"; }
-};
-template <typename Rhs>
-class GtMatcher : public ComparisonBase<GtMatcher<Rhs>, Rhs, AnyGt> {
- public:
-  explicit GtMatcher(const Rhs& rhs)
-      : ComparisonBase<GtMatcher<Rhs>, Rhs, AnyGt>(rhs) { }
-  static const char* Desc() { return "is >"; }
-  static const char* NegatedDesc() { return "isn't >"; }
-};
-template <typename Rhs>
-class LeMatcher : public ComparisonBase<LeMatcher<Rhs>, Rhs, AnyLe> {
- public:
-  explicit LeMatcher(const Rhs& rhs)
-      : ComparisonBase<LeMatcher<Rhs>, Rhs, AnyLe>(rhs) { }
-  static const char* Desc() { return "is <="; }
-  static const char* NegatedDesc() { return "isn't <="; }
-};
-template <typename Rhs>
-class GeMatcher : public ComparisonBase<GeMatcher<Rhs>, Rhs, AnyGe> {
- public:
-  explicit GeMatcher(const Rhs& rhs)
-      : ComparisonBase<GeMatcher<Rhs>, Rhs, AnyGe>(rhs) { }
-  static const char* Desc() { return "is >="; }
-  static const char* NegatedDesc() { return "isn't >="; }
-};
-
-// Implements polymorphic matchers MatchesRegex(regex) and
-// ContainsRegex(regex), which can be used as a Matcher<T> as long as
-// T can be converted to a string.
-class MatchesRegexMatcher {
- public:
-  MatchesRegexMatcher(const RE* regex, bool full_match)
-      : regex_(regex), full_match_(full_match) {}
-
-#if GTEST_HAS_ABSL
-  bool MatchAndExplain(const absl::string_view& s,
-                       MatchResultListener* listener) const {
-    return MatchAndExplain(std::string(s), listener);
-  }
-#endif  // GTEST_HAS_ABSL
-
-  // Accepts pointer types, particularly:
-  //   const char*
-  //   char*
-  //   const wchar_t*
-  //   wchar_t*
-  template <typename CharType>
-  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
-    return s != nullptr && MatchAndExplain(std::string(s), listener);
-  }
-
-  // Matches anything that can convert to std::string.
-  //
-  // This is a template, not just a plain function with const std::string&,
-  // because absl::string_view has some interfering non-explicit constructors.
-  template <class MatcheeStringType>
-  bool MatchAndExplain(const MatcheeStringType& s,
-                       MatchResultListener* /* listener */) const {
-    const std::string& s2(s);
-    return full_match_ ? RE::FullMatch(s2, *regex_)
-                       : RE::PartialMatch(s2, *regex_);
-  }
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << (full_match_ ? "matches" : "contains") << " regular expression ";
-    UniversalPrinter<std::string>::Print(regex_->pattern(), os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "doesn't " << (full_match_ ? "match" : "contain")
-        << " regular expression ";
-    UniversalPrinter<std::string>::Print(regex_->pattern(), os);
-  }
-
- private:
-  const std::shared_ptr<const RE> regex_;
-  const bool full_match_;
-};
-}  // namespace internal
-
-// Matches a string that fully matches regular expression 'regex'.
-// The matcher takes ownership of 'regex'.
-inline PolymorphicMatcher<internal::MatchesRegexMatcher> MatchesRegex(
-    const internal::RE* regex) {
-  return MakePolymorphicMatcher(internal::MatchesRegexMatcher(regex, true));
-}
-inline PolymorphicMatcher<internal::MatchesRegexMatcher> MatchesRegex(
-    const std::string& regex) {
-  return MatchesRegex(new internal::RE(regex));
-}
-
-// Matches a string that contains regular expression 'regex'.
-// The matcher takes ownership of 'regex'.
-inline PolymorphicMatcher<internal::MatchesRegexMatcher> ContainsRegex(
-    const internal::RE* regex) {
-  return MakePolymorphicMatcher(internal::MatchesRegexMatcher(regex, false));
-}
-inline PolymorphicMatcher<internal::MatchesRegexMatcher> ContainsRegex(
-    const std::string& regex) {
-  return ContainsRegex(new internal::RE(regex));
-}
-
-// Creates a polymorphic matcher that matches anything equal to x.
-// Note: if the parameter of Eq() were declared as const T&, Eq("foo")
-// wouldn't compile.
-template <typename T>
-inline internal::EqMatcher<T> Eq(T x) { return internal::EqMatcher<T>(x); }
-
-// Constructs a Matcher<T> from a 'value' of type T.  The constructed
-// matcher matches any value that's equal to 'value'.
-template <typename T>
-Matcher<T>::Matcher(T value) { *this = Eq(value); }
-
-// Creates a monomorphic matcher that matches anything with type Lhs
-// and equal to rhs.  A user may need to use this instead of Eq(...)
-// in order to resolve an overloading ambiguity.
-//
-// TypedEq<T>(x) is just a convenient short-hand for Matcher<T>(Eq(x))
-// or Matcher<T>(x), but more readable than the latter.
-//
-// We could define similar monomorphic matchers for other comparison
-// operations (e.g. TypedLt, TypedGe, and etc), but decided not to do
-// it yet as those are used much less than Eq() in practice.  A user
-// can always write Matcher<T>(Lt(5)) to be explicit about the type,
-// for example.
-template <typename Lhs, typename Rhs>
-inline Matcher<Lhs> TypedEq(const Rhs& rhs) { return Eq(rhs); }
-
-// Creates a polymorphic matcher that matches anything >= x.
-template <typename Rhs>
-inline internal::GeMatcher<Rhs> Ge(Rhs x) {
-  return internal::GeMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything > x.
-template <typename Rhs>
-inline internal::GtMatcher<Rhs> Gt(Rhs x) {
-  return internal::GtMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything <= x.
-template <typename Rhs>
-inline internal::LeMatcher<Rhs> Le(Rhs x) {
-  return internal::LeMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything < x.
-template <typename Rhs>
-inline internal::LtMatcher<Rhs> Lt(Rhs x) {
-  return internal::LtMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything != x.
-template <typename Rhs>
-inline internal::NeMatcher<Rhs> Ne(Rhs x) {
-  return internal::NeMatcher<Rhs>(x);
-}
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251 5046
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-message.h b/3rdparty/gtest/include/gtest/gtest-message.h
deleted file mode 100644
index 4a80e11e..00000000
--- a/3rdparty/gtest/include/gtest/gtest-message.h
+++ /dev/null
@@ -1,218 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the Message class.
-//
-// IMPORTANT NOTE: Due to limitation of the C++ language, we have to
-// leave some internal implementation details in this header file.
-// They are clearly marked by comments like this:
-//
-//   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-//
-// Such code is NOT meant to be used by a user directly, and is subject
-// to CHANGE WITHOUT NOTICE.  Therefore DO NOT DEPEND ON IT in a user
-// program!
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
-#define GTEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
-
-#include <limits>
-#include <memory>
-
-#include "gtest/internal/gtest-port.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-// Ensures that there is at least one operator<< in the global namespace.
-// See Message& operator<<(...) below for why.
-void operator<<(const testing::internal::Secret&, int);
-
-namespace testing {
-
-// The Message class works like an ostream repeater.
-//
-// Typical usage:
-//
-//   1. You stream a bunch of values to a Message object.
-//      It will remember the text in a stringstream.
-//   2. Then you stream the Message object to an ostream.
-//      This causes the text in the Message to be streamed
-//      to the ostream.
-//
-// For example;
-//
-//   testing::Message foo;
-//   foo << 1 << " != " << 2;
-//   std::cout << foo;
-//
-// will print "1 != 2".
-//
-// Message is not intended to be inherited from.  In particular, its
-// destructor is not virtual.
-//
-// Note that stringstream behaves differently in gcc and in MSVC.  You
-// can stream a NULL char pointer to it in the former, but not in the
-// latter (it causes an access violation if you do).  The Message
-// class hides this difference by treating a NULL char pointer as
-// "(null)".
-class GTEST_API_ Message {
- private:
-  // The type of basic IO manipulators (endl, ends, and flush) for
-  // narrow streams.
-  typedef std::ostream& (*BasicNarrowIoManip)(std::ostream&);
-
- public:
-  // Constructs an empty Message.
-  Message();
-
-  // Copy constructor.
-  Message(const Message& msg) : ss_(new ::std::stringstream) {  // NOLINT
-    *ss_ << msg.GetString();
-  }
-
-  // Constructs a Message from a C-string.
-  explicit Message(const char* str) : ss_(new ::std::stringstream) {
-    *ss_ << str;
-  }
-
-  // Streams a non-pointer value to this object.
-  template <typename T>
-  inline Message& operator <<(const T& val) {
-    // Some libraries overload << for STL containers.  These
-    // overloads are defined in the global namespace instead of ::std.
-    //
-    // C++'s symbol lookup rule (i.e. Koenig lookup) says that these
-    // overloads are visible in either the std namespace or the global
-    // namespace, but not other namespaces, including the testing
-    // namespace which Google Test's Message class is in.
-    //
-    // To allow STL containers (and other types that has a << operator
-    // defined in the global namespace) to be used in Google Test
-    // assertions, testing::Message must access the custom << operator
-    // from the global namespace.  With this using declaration,
-    // overloads of << defined in the global namespace and those
-    // visible via Koenig lookup are both exposed in this function.
-    using ::operator <<;
-    *ss_ << val;
-    return *this;
-  }
-
-  // Streams a pointer value to this object.
-  //
-  // This function is an overload of the previous one.  When you
-  // stream a pointer to a Message, this definition will be used as it
-  // is more specialized.  (The C++ Standard, section
-  // [temp.func.order].)  If you stream a non-pointer, then the
-  // previous definition will be used.
-  //
-  // The reason for this overload is that streaming a NULL pointer to
-  // ostream is undefined behavior.  Depending on the compiler, you
-  // may get "0", "(nil)", "(null)", or an access violation.  To
-  // ensure consistent result across compilers, we always treat NULL
-  // as "(null)".
-  template <typename T>
-  inline Message& operator <<(T* const& pointer) {  // NOLINT
-    if (pointer == nullptr) {
-      *ss_ << "(null)";
-    } else {
-      *ss_ << pointer;
-    }
-    return *this;
-  }
-
-  // Since the basic IO manipulators are overloaded for both narrow
-  // and wide streams, we have to provide this specialized definition
-  // of operator <<, even though its body is the same as the
-  // templatized version above.  Without this definition, streaming
-  // endl or other basic IO manipulators to Message will confuse the
-  // compiler.
-  Message& operator <<(BasicNarrowIoManip val) {
-    *ss_ << val;
-    return *this;
-  }
-
-  // Instead of 1/0, we want to see true/false for bool values.
-  Message& operator <<(bool b) {
-    return *this << (b ? "true" : "false");
-  }
-
-  // These two overloads allow streaming a wide C string to a Message
-  // using the UTF-8 encoding.
-  Message& operator <<(const wchar_t* wide_c_str);
-  Message& operator <<(wchar_t* wide_c_str);
-
-#if GTEST_HAS_STD_WSTRING
-  // Converts the given wide string to a narrow string using the UTF-8
-  // encoding, and streams the result to this Message object.
-  Message& operator <<(const ::std::wstring& wstr);
-#endif  // GTEST_HAS_STD_WSTRING
-
-  // Gets the text streamed to this object so far as an std::string.
-  // Each '\0' character in the buffer is replaced with "\\0".
-  //
-  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-  std::string GetString() const;
-
- private:
-  // We'll hold the text streamed to this object here.
-  const std::unique_ptr< ::std::stringstream> ss_;
-
-  // We declare (but don't implement) this to prevent the compiler
-  // from implementing the assignment operator.
-  void operator=(const Message&);
-};
-
-// Streams a Message to an ostream.
-inline std::ostream& operator <<(std::ostream& os, const Message& sb) {
-  return os << sb.GetString();
-}
-
-namespace internal {
-
-// Converts a streamable value to an std::string.  A NULL pointer is
-// converted to "(null)".  When the input value is a ::string,
-// ::std::string, ::wstring, or ::std::wstring object, each NUL
-// character in it is replaced with "\\0".
-template <typename T>
-std::string StreamableToString(const T& streamable) {
-  return (Message() << streamable).GetString();
-}
-
-}  // namespace internal
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-param-test.h b/3rdparty/gtest/include/gtest/gtest-param-test.h
deleted file mode 100644
index c2e6eae3..00000000
--- a/3rdparty/gtest/include/gtest/gtest-param-test.h
+++ /dev/null
@@ -1,503 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Macros and functions for implementing parameterized tests
-// in Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file is generated by a SCRIPT.  DO NOT EDIT BY HAND!
-//
-// GOOGLETEST_CM0001 DO NOT DELETE
-#ifndef GTEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
-#define GTEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
-
-
-// Value-parameterized tests allow you to test your code with different
-// parameters without writing multiple copies of the same test.
-//
-// Here is how you use value-parameterized tests:
-
-#if 0
-
-// To write value-parameterized tests, first you should define a fixture
-// class. It is usually derived from testing::TestWithParam<T> (see below for
-// another inheritance scheme that's sometimes useful in more complicated
-// class hierarchies), where the type of your parameter values.
-// TestWithParam<T> is itself derived from testing::Test. T can be any
-// copyable type. If it's a raw pointer, you are responsible for managing the
-// lifespan of the pointed values.
-
-class FooTest : public ::testing::TestWithParam<const char*> {
-  // You can implement all the usual class fixture members here.
-};
-
-// Then, use the TEST_P macro to define as many parameterized tests
-// for this fixture as you want. The _P suffix is for "parameterized"
-// or "pattern", whichever you prefer to think.
-
-TEST_P(FooTest, DoesBlah) {
-  // Inside a test, access the test parameter with the GetParam() method
-  // of the TestWithParam<T> class:
-  EXPECT_TRUE(foo.Blah(GetParam()));
-  ...
-}
-
-TEST_P(FooTest, HasBlahBlah) {
-  ...
-}
-
-// Finally, you can use INSTANTIATE_TEST_SUITE_P to instantiate the test
-// case with any set of parameters you want. Google Test defines a number
-// of functions for generating test parameters. They return what we call
-// (surprise!) parameter generators. Here is a summary of them, which
-// are all in the testing namespace:
-//
-//
-//  Range(begin, end [, step]) - Yields values {begin, begin+step,
-//                               begin+step+step, ...}. The values do not
-//                               include end. step defaults to 1.
-//  Values(v1, v2, ..., vN)    - Yields values {v1, v2, ..., vN}.
-//  ValuesIn(container)        - Yields values from a C-style array, an STL
-//  ValuesIn(begin,end)          container, or an iterator range [begin, end).
-//  Bool()                     - Yields sequence {false, true}.
-//  Combine(g1, g2, ..., gN)   - Yields all combinations (the Cartesian product
-//                               for the math savvy) of the values generated
-//                               by the N generators.
-//
-// For more details, see comments at the definitions of these functions below
-// in this file.
-//
-// The following statement will instantiate tests from the FooTest test suite
-// each with parameter values "meeny", "miny", and "moe".
-
-INSTANTIATE_TEST_SUITE_P(InstantiationName,
-                         FooTest,
-                         Values("meeny", "miny", "moe"));
-
-// To distinguish different instances of the pattern, (yes, you
-// can instantiate it more than once) the first argument to the
-// INSTANTIATE_TEST_SUITE_P macro is a prefix that will be added to the
-// actual test suite name. Remember to pick unique prefixes for different
-// instantiations. The tests from the instantiation above will have
-// these names:
-//
-//    * InstantiationName/FooTest.DoesBlah/0 for "meeny"
-//    * InstantiationName/FooTest.DoesBlah/1 for "miny"
-//    * InstantiationName/FooTest.DoesBlah/2 for "moe"
-//    * InstantiationName/FooTest.HasBlahBlah/0 for "meeny"
-//    * InstantiationName/FooTest.HasBlahBlah/1 for "miny"
-//    * InstantiationName/FooTest.HasBlahBlah/2 for "moe"
-//
-// You can use these names in --gtest_filter.
-//
-// This statement will instantiate all tests from FooTest again, each
-// with parameter values "cat" and "dog":
-
-const char* pets[] = {"cat", "dog"};
-INSTANTIATE_TEST_SUITE_P(AnotherInstantiationName, FooTest, ValuesIn(pets));
-
-// The tests from the instantiation above will have these names:
-//
-//    * AnotherInstantiationName/FooTest.DoesBlah/0 for "cat"
-//    * AnotherInstantiationName/FooTest.DoesBlah/1 for "dog"
-//    * AnotherInstantiationName/FooTest.HasBlahBlah/0 for "cat"
-//    * AnotherInstantiationName/FooTest.HasBlahBlah/1 for "dog"
-//
-// Please note that INSTANTIATE_TEST_SUITE_P will instantiate all tests
-// in the given test suite, whether their definitions come before or
-// AFTER the INSTANTIATE_TEST_SUITE_P statement.
-//
-// Please also note that generator expressions (including parameters to the
-// generators) are evaluated in InitGoogleTest(), after main() has started.
-// This allows the user on one hand, to adjust generator parameters in order
-// to dynamically determine a set of tests to run and on the other hand,
-// give the user a chance to inspect the generated tests with Google Test
-// reflection API before RUN_ALL_TESTS() is executed.
-//
-// You can see samples/sample7_unittest.cc and samples/sample8_unittest.cc
-// for more examples.
-//
-// In the future, we plan to publish the API for defining new parameter
-// generators. But for now this interface remains part of the internal
-// implementation and is subject to change.
-//
-//
-// A parameterized test fixture must be derived from testing::Test and from
-// testing::WithParamInterface<T>, where T is the type of the parameter
-// values. Inheriting from TestWithParam<T> satisfies that requirement because
-// TestWithParam<T> inherits from both Test and WithParamInterface. In more
-// complicated hierarchies, however, it is occasionally useful to inherit
-// separately from Test and WithParamInterface. For example:
-
-class BaseTest : public ::testing::Test {
-  // You can inherit all the usual members for a non-parameterized test
-  // fixture here.
-};
-
-class DerivedTest : public BaseTest, public ::testing::WithParamInterface<int> {
-  // The usual test fixture members go here too.
-};
-
-TEST_F(BaseTest, HasFoo) {
-  // This is an ordinary non-parameterized test.
-}
-
-TEST_P(DerivedTest, DoesBlah) {
-  // GetParam works just the same here as if you inherit from TestWithParam.
-  EXPECT_TRUE(foo.Blah(GetParam()));
-}
-
-#endif  // 0
-
-#include <iterator>
-#include <utility>
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-param-util.h"
-#include "gtest/internal/gtest-port.h"
-
-namespace testing {
-
-// Functions producing parameter generators.
-//
-// Google Test uses these generators to produce parameters for value-
-// parameterized tests. When a parameterized test suite is instantiated
-// with a particular generator, Google Test creates and runs tests
-// for each element in the sequence produced by the generator.
-//
-// In the following sample, tests from test suite FooTest are instantiated
-// each three times with parameter values 3, 5, and 8:
-//
-// class FooTest : public TestWithParam<int> { ... };
-//
-// TEST_P(FooTest, TestThis) {
-// }
-// TEST_P(FooTest, TestThat) {
-// }
-// INSTANTIATE_TEST_SUITE_P(TestSequence, FooTest, Values(3, 5, 8));
-//
-
-// Range() returns generators providing sequences of values in a range.
-//
-// Synopsis:
-// Range(start, end)
-//   - returns a generator producing a sequence of values {start, start+1,
-//     start+2, ..., }.
-// Range(start, end, step)
-//   - returns a generator producing a sequence of values {start, start+step,
-//     start+step+step, ..., }.
-// Notes:
-//   * The generated sequences never include end. For example, Range(1, 5)
-//     returns a generator producing a sequence {1, 2, 3, 4}. Range(1, 9, 2)
-//     returns a generator producing {1, 3, 5, 7}.
-//   * start and end must have the same type. That type may be any integral or
-//     floating-point type or a user defined type satisfying these conditions:
-//     * It must be assignable (have operator=() defined).
-//     * It must have operator+() (operator+(int-compatible type) for
-//       two-operand version).
-//     * It must have operator<() defined.
-//     Elements in the resulting sequences will also have that type.
-//   * Condition start < end must be satisfied in order for resulting sequences
-//     to contain any elements.
-//
-template <typename T, typename IncrementT>
-internal::ParamGenerator<T> Range(T start, T end, IncrementT step) {
-  return internal::ParamGenerator<T>(
-      new internal::RangeGenerator<T, IncrementT>(start, end, step));
-}
-
-template <typename T>
-internal::ParamGenerator<T> Range(T start, T end) {
-  return Range(start, end, 1);
-}
-
-// ValuesIn() function allows generation of tests with parameters coming from
-// a container.
-//
-// Synopsis:
-// ValuesIn(const T (&array)[N])
-//   - returns a generator producing sequences with elements from
-//     a C-style array.
-// ValuesIn(const Container& container)
-//   - returns a generator producing sequences with elements from
-//     an STL-style container.
-// ValuesIn(Iterator begin, Iterator end)
-//   - returns a generator producing sequences with elements from
-//     a range [begin, end) defined by a pair of STL-style iterators. These
-//     iterators can also be plain C pointers.
-//
-// Please note that ValuesIn copies the values from the containers
-// passed in and keeps them to generate tests in RUN_ALL_TESTS().
-//
-// Examples:
-//
-// This instantiates tests from test suite StringTest
-// each with C-string values of "foo", "bar", and "baz":
-//
-// const char* strings[] = {"foo", "bar", "baz"};
-// INSTANTIATE_TEST_SUITE_P(StringSequence, StringTest, ValuesIn(strings));
-//
-// This instantiates tests from test suite StlStringTest
-// each with STL strings with values "a" and "b":
-//
-// ::std::vector< ::std::string> GetParameterStrings() {
-//   ::std::vector< ::std::string> v;
-//   v.push_back("a");
-//   v.push_back("b");
-//   return v;
-// }
-//
-// INSTANTIATE_TEST_SUITE_P(CharSequence,
-//                          StlStringTest,
-//                          ValuesIn(GetParameterStrings()));
-//
-//
-// This will also instantiate tests from CharTest
-// each with parameter values 'a' and 'b':
-//
-// ::std::list<char> GetParameterChars() {
-//   ::std::list<char> list;
-//   list.push_back('a');
-//   list.push_back('b');
-//   return list;
-// }
-// ::std::list<char> l = GetParameterChars();
-// INSTANTIATE_TEST_SUITE_P(CharSequence2,
-//                          CharTest,
-//                          ValuesIn(l.begin(), l.end()));
-//
-template <typename ForwardIterator>
-internal::ParamGenerator<
-    typename std::iterator_traits<ForwardIterator>::value_type>
-ValuesIn(ForwardIterator begin, ForwardIterator end) {
-  typedef typename std::iterator_traits<ForwardIterator>::value_type ParamType;
-  return internal::ParamGenerator<ParamType>(
-      new internal::ValuesInIteratorRangeGenerator<ParamType>(begin, end));
-}
-
-template <typename T, size_t N>
-internal::ParamGenerator<T> ValuesIn(const T (&array)[N]) {
-  return ValuesIn(array, array + N);
-}
-
-template <class Container>
-internal::ParamGenerator<typename Container::value_type> ValuesIn(
-    const Container& container) {
-  return ValuesIn(container.begin(), container.end());
-}
-
-// Values() allows generating tests from explicitly specified list of
-// parameters.
-//
-// Synopsis:
-// Values(T v1, T v2, ..., T vN)
-//   - returns a generator producing sequences with elements v1, v2, ..., vN.
-//
-// For example, this instantiates tests from test suite BarTest each
-// with values "one", "two", and "three":
-//
-// INSTANTIATE_TEST_SUITE_P(NumSequence,
-//                          BarTest,
-//                          Values("one", "two", "three"));
-//
-// This instantiates tests from test suite BazTest each with values 1, 2, 3.5.
-// The exact type of values will depend on the type of parameter in BazTest.
-//
-// INSTANTIATE_TEST_SUITE_P(FloatingNumbers, BazTest, Values(1, 2, 3.5));
-//
-//
-template <typename... T>
-internal::ValueArray<T...> Values(T... v) {
-  return internal::ValueArray<T...>(std::move(v)...);
-}
-
-// Bool() allows generating tests with parameters in a set of (false, true).
-//
-// Synopsis:
-// Bool()
-//   - returns a generator producing sequences with elements {false, true}.
-//
-// It is useful when testing code that depends on Boolean flags. Combinations
-// of multiple flags can be tested when several Bool()'s are combined using
-// Combine() function.
-//
-// In the following example all tests in the test suite FlagDependentTest
-// will be instantiated twice with parameters false and true.
-//
-// class FlagDependentTest : public testing::TestWithParam<bool> {
-//   virtual void SetUp() {
-//     external_flag = GetParam();
-//   }
-// }
-// INSTANTIATE_TEST_SUITE_P(BoolSequence, FlagDependentTest, Bool());
-//
-inline internal::ParamGenerator<bool> Bool() {
-  return Values(false, true);
-}
-
-// Combine() allows the user to combine two or more sequences to produce
-// values of a Cartesian product of those sequences' elements.
-//
-// Synopsis:
-// Combine(gen1, gen2, ..., genN)
-//   - returns a generator producing sequences with elements coming from
-//     the Cartesian product of elements from the sequences generated by
-//     gen1, gen2, ..., genN. The sequence elements will have a type of
-//     std::tuple<T1, T2, ..., TN> where T1, T2, ..., TN are the types
-//     of elements from sequences produces by gen1, gen2, ..., genN.
-//
-// Combine can have up to 10 arguments.
-//
-// Example:
-//
-// This will instantiate tests in test suite AnimalTest each one with
-// the parameter values tuple("cat", BLACK), tuple("cat", WHITE),
-// tuple("dog", BLACK), and tuple("dog", WHITE):
-//
-// enum Color { BLACK, GRAY, WHITE };
-// class AnimalTest
-//     : public testing::TestWithParam<std::tuple<const char*, Color> > {...};
-//
-// TEST_P(AnimalTest, AnimalLooksNice) {...}
-//
-// INSTANTIATE_TEST_SUITE_P(AnimalVariations, AnimalTest,
-//                          Combine(Values("cat", "dog"),
-//                                  Values(BLACK, WHITE)));
-//
-// This will instantiate tests in FlagDependentTest with all variations of two
-// Boolean flags:
-//
-// class FlagDependentTest
-//     : public testing::TestWithParam<std::tuple<bool, bool> > {
-//   virtual void SetUp() {
-//     // Assigns external_flag_1 and external_flag_2 values from the tuple.
-//     std::tie(external_flag_1, external_flag_2) = GetParam();
-//   }
-// };
-//
-// TEST_P(FlagDependentTest, TestFeature1) {
-//   // Test your code using external_flag_1 and external_flag_2 here.
-// }
-// INSTANTIATE_TEST_SUITE_P(TwoBoolSequence, FlagDependentTest,
-//                          Combine(Bool(), Bool()));
-//
-template <typename... Generator>
-internal::CartesianProductHolder<Generator...> Combine(const Generator&... g) {
-  return internal::CartesianProductHolder<Generator...>(g...);
-}
-
-#define TEST_P(test_suite_name, test_name)                                     \
-  class GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)                     \
-      : public test_suite_name {                                               \
-   public:                                                                     \
-    GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() {}                    \
-    virtual void TestBody();                                                   \
-                                                                               \
-   private:                                                                    \
-    static int AddToRegistry() {                                               \
-      ::testing::UnitTest::GetInstance()                                       \
-          ->parameterized_test_registry()                                      \
-          .GetTestSuitePatternHolder<test_suite_name>(                         \
-              #test_suite_name,                                                \
-              ::testing::internal::CodeLocation(__FILE__, __LINE__))           \
-          ->AddTestPattern(                                                    \
-              GTEST_STRINGIFY_(test_suite_name), GTEST_STRINGIFY_(test_name),  \
-              new ::testing::internal::TestMetaFactory<GTEST_TEST_CLASS_NAME_( \
-                  test_suite_name, test_name)>());                             \
-      return 0;                                                                \
-    }                                                                          \
-    static int gtest_registering_dummy_ GTEST_ATTRIBUTE_UNUSED_;               \
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name,    \
-                                                           test_name));        \
-  };                                                                           \
-  int GTEST_TEST_CLASS_NAME_(test_suite_name,                                  \
-                             test_name)::gtest_registering_dummy_ =            \
-      GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::AddToRegistry();     \
-  void GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::TestBody()
-
-// The last argument to INSTANTIATE_TEST_SUITE_P allows the user to specify
-// generator and an optional function or functor that generates custom test name
-// suffixes based on the test parameters. Such a function or functor should
-// accept one argument of type testing::TestParamInfo<class ParamType>, and
-// return std::string.
-//
-// testing::PrintToStringParamName is a builtin test suffix generator that
-// returns the value of testing::PrintToString(GetParam()).
-//
-// Note: test names must be non-empty, unique, and may only contain ASCII
-// alphanumeric characters or underscore. Because PrintToString adds quotes
-// to std::string and C strings, it won't work for these types.
-
-#define GTEST_EXPAND_(arg) arg
-#define GTEST_GET_FIRST_(first, ...) first
-#define GTEST_GET_SECOND_(first, second, ...) second
-
-#define INSTANTIATE_TEST_SUITE_P(prefix, test_suite_name, ...)                \
-  static ::testing::internal::ParamGenerator<test_suite_name::ParamType>      \
-      gtest_##prefix##test_suite_name##_EvalGenerator_() {                    \
-    return GTEST_EXPAND_(GTEST_GET_FIRST_(__VA_ARGS__, DUMMY_PARAM_));        \
-  }                                                                           \
-  static ::std::string gtest_##prefix##test_suite_name##_EvalGenerateName_(   \
-      const ::testing::TestParamInfo<test_suite_name::ParamType>& info) {     \
-    if (::testing::internal::AlwaysFalse()) {                                 \
-      ::testing::internal::TestNotEmpty(GTEST_EXPAND_(GTEST_GET_SECOND_(      \
-          __VA_ARGS__,                                                        \
-          ::testing::internal::DefaultParamName<test_suite_name::ParamType>,  \
-          DUMMY_PARAM_)));                                                    \
-      auto t = std::make_tuple(__VA_ARGS__);                                  \
-      static_assert(std::tuple_size<decltype(t)>::value <= 2,                 \
-                    "Too Many Args!");                                        \
-    }                                                                         \
-    return ((GTEST_EXPAND_(GTEST_GET_SECOND_(                                 \
-        __VA_ARGS__,                                                          \
-        ::testing::internal::DefaultParamName<test_suite_name::ParamType>,    \
-        DUMMY_PARAM_))))(info);                                               \
-  }                                                                           \
-  static int gtest_##prefix##test_suite_name##_dummy_                         \
-      GTEST_ATTRIBUTE_UNUSED_ =                                               \
-          ::testing::UnitTest::GetInstance()                                  \
-              ->parameterized_test_registry()                                 \
-              .GetTestSuitePatternHolder<test_suite_name>(                    \
-                  #test_suite_name,                                           \
-                  ::testing::internal::CodeLocation(__FILE__, __LINE__))      \
-              ->AddTestSuiteInstantiation(                                    \
-                  #prefix, &gtest_##prefix##test_suite_name##_EvalGenerator_, \
-                  &gtest_##prefix##test_suite_name##_EvalGenerateName_,       \
-                  __FILE__, __LINE__)
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define INSTANTIATE_TEST_CASE_P                                            \
-  static_assert(::testing::internal::InstantiateTestCase_P_IsDeprecated(), \
-                "");                                                       \
-  INSTANTIATE_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-printers.h b/3rdparty/gtest/include/gtest/gtest-printers.h
deleted file mode 100644
index 56a05450..00000000
--- a/3rdparty/gtest/include/gtest/gtest-printers.h
+++ /dev/null
@@ -1,928 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Test - The Google C++ Testing and Mocking Framework
-//
-// This file implements a universal value printer that can print a
-// value of any type T:
-//
-//   void ::testing::internal::UniversalPrinter<T>::Print(value, ostream_ptr);
-//
-// A user can teach this function how to print a class type T by
-// defining either operator<<() or PrintTo() in the namespace that
-// defines T.  More specifically, the FIRST defined function in the
-// following list will be used (assuming T is defined in namespace
-// foo):
-//
-//   1. foo::PrintTo(const T&, ostream*)
-//   2. operator<<(ostream&, const T&) defined in either foo or the
-//      global namespace.
-//
-// However if T is an STL-style container then it is printed element-wise
-// unless foo::PrintTo(const T&, ostream*) is defined. Note that
-// operator<<() is ignored for container types.
-//
-// If none of the above is defined, it will print the debug string of
-// the value if it is a protocol buffer, or print the raw bytes in the
-// value otherwise.
-//
-// To aid debugging: when T is a reference type, the address of the
-// value is also printed; when T is a (const) char pointer, both the
-// pointer value and the NUL-terminated string it points to are
-// printed.
-//
-// We also provide some convenient wrappers:
-//
-//   // Prints a value to a string.  For a (const or not) char
-//   // pointer, the NUL-terminated string (but not the pointer) is
-//   // printed.
-//   std::string ::testing::PrintToString(const T& value);
-//
-//   // Prints a value tersely: for a reference type, the referenced
-//   // value (but not the address) is printed; for a (const or not) char
-//   // pointer, the NUL-terminated string (but not the pointer) is
-//   // printed.
-//   void ::testing::internal::UniversalTersePrint(const T& value, ostream*);
-//
-//   // Prints value using the type inferred by the compiler.  The difference
-//   // from UniversalTersePrint() is that this function prints both the
-//   // pointer and the NUL-terminated string for a (const or not) char pointer.
-//   void ::testing::internal::UniversalPrint(const T& value, ostream*);
-//
-//   // Prints the fields of a tuple tersely to a string vector, one
-//   // element for each field. Tuple support must be enabled in
-//   // gtest-port.h.
-//   std::vector<string> UniversalTersePrintTupleFieldsToStrings(
-//       const Tuple& value);
-//
-// Known limitation:
-//
-// The print primitives print the elements of an STL-style container
-// using the compiler-inferred type of *iter where iter is a
-// const_iterator of the container.  When const_iterator is an input
-// iterator but not a forward iterator, this inferred type may not
-// match value_type, and the print output may be incorrect.  In
-// practice, this is rarely a problem as for most containers
-// const_iterator is a forward iterator.  We'll fix this if there's an
-// actual need for it.  Note that this fix cannot rely on value_type
-// being defined as many user-defined container types don't have
-// value_type.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
-#define GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
-
-#include <functional>
-#include <ostream>  // NOLINT
-#include <sstream>
-#include <string>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-#include <vector>
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-port.h"
-
-#if GTEST_HAS_ABSL
-#include "absl/strings/string_view.h"
-#include "absl/types/optional.h"
-#include "absl/types/variant.h"
-#endif  // GTEST_HAS_ABSL
-
-namespace testing {
-
-// Definitions in the 'internal' and 'internal2' name spaces are
-// subject to change without notice.  DO NOT USE THEM IN USER CODE!
-namespace internal2 {
-
-// Prints the given number of bytes in the given object to the given
-// ostream.
-GTEST_API_ void PrintBytesInObjectTo(const unsigned char* obj_bytes,
-                                     size_t count,
-                                     ::std::ostream* os);
-
-// For selecting which printer to use when a given type has neither <<
-// nor PrintTo().
-enum TypeKind {
-  kProtobuf,              // a protobuf type
-  kConvertibleToInteger,  // a type implicitly convertible to BiggestInt
-                          // (e.g. a named or unnamed enum type)
-#if GTEST_HAS_ABSL
-  kConvertibleToStringView,  // a type implicitly convertible to
-                             // absl::string_view
-#endif
-  kOtherType  // anything else
-};
-
-// TypeWithoutFormatter<T, kTypeKind>::PrintValue(value, os) is called
-// by the universal printer to print a value of type T when neither
-// operator<< nor PrintTo() is defined for T, where kTypeKind is the
-// "kind" of T as defined by enum TypeKind.
-template <typename T, TypeKind kTypeKind>
-class TypeWithoutFormatter {
- public:
-  // This default version is called when kTypeKind is kOtherType.
-  static void PrintValue(const T& value, ::std::ostream* os) {
-    PrintBytesInObjectTo(
-        static_cast<const unsigned char*>(
-            reinterpret_cast<const void*>(std::addressof(value))),
-        sizeof(value), os);
-  }
-};
-
-// We print a protobuf using its ShortDebugString() when the string
-// doesn't exceed this many characters; otherwise we print it using
-// DebugString() for better readability.
-const size_t kProtobufOneLinerMaxLength = 50;
-
-template <typename T>
-class TypeWithoutFormatter<T, kProtobuf> {
- public:
-  static void PrintValue(const T& value, ::std::ostream* os) {
-    std::string pretty_str = value.ShortDebugString();
-    if (pretty_str.length() > kProtobufOneLinerMaxLength) {
-      pretty_str = "\n" + value.DebugString();
-    }
-    *os << ("<" + pretty_str + ">");
-  }
-};
-
-template <typename T>
-class TypeWithoutFormatter<T, kConvertibleToInteger> {
- public:
-  // Since T has no << operator or PrintTo() but can be implicitly
-  // converted to BiggestInt, we print it as a BiggestInt.
-  //
-  // Most likely T is an enum type (either named or unnamed), in which
-  // case printing it as an integer is the desired behavior.  In case
-  // T is not an enum, printing it as an integer is the best we can do
-  // given that it has no user-defined printer.
-  static void PrintValue(const T& value, ::std::ostream* os) {
-    const internal::BiggestInt kBigInt = value;
-    *os << kBigInt;
-  }
-};
-
-#if GTEST_HAS_ABSL
-template <typename T>
-class TypeWithoutFormatter<T, kConvertibleToStringView> {
- public:
-  // Since T has neither operator<< nor PrintTo() but can be implicitly
-  // converted to absl::string_view, we print it as a absl::string_view.
-  //
-  // Note: the implementation is further below, as it depends on
-  // internal::PrintTo symbol which is defined later in the file.
-  static void PrintValue(const T& value, ::std::ostream* os);
-};
-#endif
-
-// Prints the given value to the given ostream.  If the value is a
-// protocol message, its debug string is printed; if it's an enum or
-// of a type implicitly convertible to BiggestInt, it's printed as an
-// integer; otherwise the bytes in the value are printed.  This is
-// what UniversalPrinter<T>::Print() does when it knows nothing about
-// type T and T has neither << operator nor PrintTo().
-//
-// A user can override this behavior for a class type Foo by defining
-// a << operator in the namespace where Foo is defined.
-//
-// We put this operator in namespace 'internal2' instead of 'internal'
-// to simplify the implementation, as much code in 'internal' needs to
-// use << in STL, which would conflict with our own << were it defined
-// in 'internal'.
-//
-// Note that this operator<< takes a generic std::basic_ostream<Char,
-// CharTraits> type instead of the more restricted std::ostream.  If
-// we define it to take an std::ostream instead, we'll get an
-// "ambiguous overloads" compiler error when trying to print a type
-// Foo that supports streaming to std::basic_ostream<Char,
-// CharTraits>, as the compiler cannot tell whether
-// operator<<(std::ostream&, const T&) or
-// operator<<(std::basic_stream<Char, CharTraits>, const Foo&) is more
-// specific.
-template <typename Char, typename CharTraits, typename T>
-::std::basic_ostream<Char, CharTraits>& operator<<(
-    ::std::basic_ostream<Char, CharTraits>& os, const T& x) {
-  TypeWithoutFormatter<T, (internal::IsAProtocolMessage<T>::value
-                               ? kProtobuf
-                               : std::is_convertible<
-                                     const T&, internal::BiggestInt>::value
-                                     ? kConvertibleToInteger
-                                     :
-#if GTEST_HAS_ABSL
-                                     std::is_convertible<
-                                         const T&, absl::string_view>::value
-                                         ? kConvertibleToStringView
-                                         :
-#endif
-                                         kOtherType)>::PrintValue(x, &os);
-  return os;
-}
-
-}  // namespace internal2
-}  // namespace testing
-
-// This namespace MUST NOT BE NESTED IN ::testing, or the name look-up
-// magic needed for implementing UniversalPrinter won't work.
-namespace testing_internal {
-
-// Used to print a value that is not an STL-style container when the
-// user doesn't define PrintTo() for it.
-template <typename T>
-void DefaultPrintNonContainerTo(const T& value, ::std::ostream* os) {
-  // With the following statement, during unqualified name lookup,
-  // testing::internal2::operator<< appears as if it was declared in
-  // the nearest enclosing namespace that contains both
-  // ::testing_internal and ::testing::internal2, i.e. the global
-  // namespace.  For more details, refer to the C++ Standard section
-  // 7.3.4-1 [namespace.udir].  This allows us to fall back onto
-  // testing::internal2::operator<< in case T doesn't come with a <<
-  // operator.
-  //
-  // We cannot write 'using ::testing::internal2::operator<<;', which
-  // gcc 3.3 fails to compile due to a compiler bug.
-  using namespace ::testing::internal2;  // NOLINT
-
-  // Assuming T is defined in namespace foo, in the next statement,
-  // the compiler will consider all of:
-  //
-  //   1. foo::operator<< (thanks to Koenig look-up),
-  //   2. ::operator<< (as the current namespace is enclosed in ::),
-  //   3. testing::internal2::operator<< (thanks to the using statement above).
-  //
-  // The operator<< whose type matches T best will be picked.
-  //
-  // We deliberately allow #2 to be a candidate, as sometimes it's
-  // impossible to define #1 (e.g. when foo is ::std, defining
-  // anything in it is undefined behavior unless you are a compiler
-  // vendor.).
-  *os << value;
-}
-
-}  // namespace testing_internal
-
-namespace testing {
-namespace internal {
-
-// FormatForComparison<ToPrint, OtherOperand>::Format(value) formats a
-// value of type ToPrint that is an operand of a comparison assertion
-// (e.g. ASSERT_EQ).  OtherOperand is the type of the other operand in
-// the comparison, and is used to help determine the best way to
-// format the value.  In particular, when the value is a C string
-// (char pointer) and the other operand is an STL string object, we
-// want to format the C string as a string, since we know it is
-// compared by value with the string object.  If the value is a char
-// pointer but the other operand is not an STL string object, we don't
-// know whether the pointer is supposed to point to a NUL-terminated
-// string, and thus want to print it as a pointer to be safe.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-
-// The default case.
-template <typename ToPrint, typename OtherOperand>
-class FormatForComparison {
- public:
-  static ::std::string Format(const ToPrint& value) {
-    return ::testing::PrintToString(value);
-  }
-};
-
-// Array.
-template <typename ToPrint, size_t N, typename OtherOperand>
-class FormatForComparison<ToPrint[N], OtherOperand> {
- public:
-  static ::std::string Format(const ToPrint* value) {
-    return FormatForComparison<const ToPrint*, OtherOperand>::Format(value);
-  }
-};
-
-// By default, print C string as pointers to be safe, as we don't know
-// whether they actually point to a NUL-terminated string.
-
-#define GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(CharType)                \
-  template <typename OtherOperand>                                      \
-  class FormatForComparison<CharType*, OtherOperand> {                  \
-   public:                                                              \
-    static ::std::string Format(CharType* value) {                      \
-      return ::testing::PrintToString(static_cast<const void*>(value)); \
-    }                                                                   \
-  }
-
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(wchar_t);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const wchar_t);
-
-#undef GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_
-
-// If a C string is compared with an STL string object, we know it's meant
-// to point to a NUL-terminated string, and thus can print it as a string.
-
-#define GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(CharType, OtherStringType) \
-  template <>                                                           \
-  class FormatForComparison<CharType*, OtherStringType> {               \
-   public:                                                              \
-    static ::std::string Format(CharType* value) {                      \
-      return ::testing::PrintToString(value);                           \
-    }                                                                   \
-  }
-
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char, ::std::string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char, ::std::string);
-
-#if GTEST_HAS_STD_WSTRING
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(wchar_t, ::std::wstring);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const wchar_t, ::std::wstring);
-#endif
-
-#undef GTEST_IMPL_FORMAT_C_STRING_AS_STRING_
-
-// Formats a comparison assertion (e.g. ASSERT_EQ, EXPECT_LT, and etc)
-// operand to be used in a failure message.  The type (but not value)
-// of the other operand may affect the format.  This allows us to
-// print a char* as a raw pointer when it is compared against another
-// char* or void*, and print it as a C string when it is compared
-// against an std::string object, for example.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-template <typename T1, typename T2>
-std::string FormatForComparisonFailureMessage(
-    const T1& value, const T2& /* other_operand */) {
-  return FormatForComparison<T1, T2>::Format(value);
-}
-
-// UniversalPrinter<T>::Print(value, ostream_ptr) prints the given
-// value to the given ostream.  The caller must ensure that
-// 'ostream_ptr' is not NULL, or the behavior is undefined.
-//
-// We define UniversalPrinter as a class template (as opposed to a
-// function template), as we need to partially specialize it for
-// reference types, which cannot be done with function templates.
-template <typename T>
-class UniversalPrinter;
-
-template <typename T>
-void UniversalPrint(const T& value, ::std::ostream* os);
-
-enum DefaultPrinterType {
-  kPrintContainer,
-  kPrintPointer,
-  kPrintFunctionPointer,
-  kPrintOther,
-};
-template <DefaultPrinterType type> struct WrapPrinterType {};
-
-// Used to print an STL-style container when the user doesn't define
-// a PrintTo() for it.
-template <typename C>
-void DefaultPrintTo(WrapPrinterType<kPrintContainer> /* dummy */,
-                    const C& container, ::std::ostream* os) {
-  const size_t kMaxCount = 32;  // The maximum number of elements to print.
-  *os << '{';
-  size_t count = 0;
-  for (typename C::const_iterator it = container.begin();
-       it != container.end(); ++it, ++count) {
-    if (count > 0) {
-      *os << ',';
-      if (count == kMaxCount) {  // Enough has been printed.
-        *os << " ...";
-        break;
-      }
-    }
-    *os << ' ';
-    // We cannot call PrintTo(*it, os) here as PrintTo() doesn't
-    // handle *it being a native array.
-    internal::UniversalPrint(*it, os);
-  }
-
-  if (count > 0) {
-    *os << ' ';
-  }
-  *os << '}';
-}
-
-// Used to print a pointer that is neither a char pointer nor a member
-// pointer, when the user doesn't define PrintTo() for it.  (A member
-// variable pointer or member function pointer doesn't really point to
-// a location in the address space.  Their representation is
-// implementation-defined.  Therefore they will be printed as raw
-// bytes.)
-template <typename T>
-void DefaultPrintTo(WrapPrinterType<kPrintPointer> /* dummy */,
-                    T* p, ::std::ostream* os) {
-  if (p == nullptr) {
-    *os << "NULL";
-  } else {
-    // T is not a function type.  We just call << to print p,
-    // relying on ADL to pick up user-defined << for their pointer
-    // types, if any.
-    *os << p;
-  }
-}
-template <typename T>
-void DefaultPrintTo(WrapPrinterType<kPrintFunctionPointer> /* dummy */,
-                    T* p, ::std::ostream* os) {
-  if (p == nullptr) {
-    *os << "NULL";
-  } else {
-    // T is a function type, so '*os << p' doesn't do what we want
-    // (it just prints p as bool).  We want to print p as a const
-    // void*.
-    *os << reinterpret_cast<const void*>(p);
-  }
-}
-
-// Used to print a non-container, non-pointer value when the user
-// doesn't define PrintTo() for it.
-template <typename T>
-void DefaultPrintTo(WrapPrinterType<kPrintOther> /* dummy */,
-                    const T& value, ::std::ostream* os) {
-  ::testing_internal::DefaultPrintNonContainerTo(value, os);
-}
-
-// Prints the given value using the << operator if it has one;
-// otherwise prints the bytes in it.  This is what
-// UniversalPrinter<T>::Print() does when PrintTo() is not specialized
-// or overloaded for type T.
-//
-// A user can override this behavior for a class type Foo by defining
-// an overload of PrintTo() in the namespace where Foo is defined.  We
-// give the user this option as sometimes defining a << operator for
-// Foo is not desirable (e.g. the coding style may prevent doing it,
-// or there is already a << operator but it doesn't do what the user
-// wants).
-template <typename T>
-void PrintTo(const T& value, ::std::ostream* os) {
-  // DefaultPrintTo() is overloaded.  The type of its first argument
-  // determines which version will be picked.
-  //
-  // Note that we check for container types here, prior to we check
-  // for protocol message types in our operator<<.  The rationale is:
-  //
-  // For protocol messages, we want to give people a chance to
-  // override Google Mock's format by defining a PrintTo() or
-  // operator<<.  For STL containers, other formats can be
-  // incompatible with Google Mock's format for the container
-  // elements; therefore we check for container types here to ensure
-  // that our format is used.
-  //
-  // Note that MSVC and clang-cl do allow an implicit conversion from
-  // pointer-to-function to pointer-to-object, but clang-cl warns on it.
-  // So don't use ImplicitlyConvertible if it can be helped since it will
-  // cause this warning, and use a separate overload of DefaultPrintTo for
-  // function pointers so that the `*os << p` in the object pointer overload
-  // doesn't cause that warning either.
-  DefaultPrintTo(
-      WrapPrinterType <
-                  (sizeof(IsContainerTest<T>(0)) == sizeof(IsContainer)) &&
-              !IsRecursiveContainer<T>::value
-          ? kPrintContainer
-          : !std::is_pointer<T>::value
-                ? kPrintOther
-                : std::is_function<typename std::remove_pointer<T>::type>::value
-                      ? kPrintFunctionPointer
-                      : kPrintPointer > (),
-      value, os);
-}
-
-// The following list of PrintTo() overloads tells
-// UniversalPrinter<T>::Print() how to print standard types (built-in
-// types, strings, plain arrays, and pointers).
-
-// Overloads for various char types.
-GTEST_API_ void PrintTo(unsigned char c, ::std::ostream* os);
-GTEST_API_ void PrintTo(signed char c, ::std::ostream* os);
-inline void PrintTo(char c, ::std::ostream* os) {
-  // When printing a plain char, we always treat it as unsigned.  This
-  // way, the output won't be affected by whether the compiler thinks
-  // char is signed or not.
-  PrintTo(static_cast<unsigned char>(c), os);
-}
-
-// Overloads for other simple built-in types.
-inline void PrintTo(bool x, ::std::ostream* os) {
-  *os << (x ? "true" : "false");
-}
-
-// Overload for wchar_t type.
-// Prints a wchar_t as a symbol if it is printable or as its internal
-// code otherwise and also as its decimal code (except for L'\0').
-// The L'\0' char is printed as "L'\\0'". The decimal code is printed
-// as signed integer when wchar_t is implemented by the compiler
-// as a signed type and is printed as an unsigned integer when wchar_t
-// is implemented as an unsigned type.
-GTEST_API_ void PrintTo(wchar_t wc, ::std::ostream* os);
-
-// Overloads for C strings.
-GTEST_API_ void PrintTo(const char* s, ::std::ostream* os);
-inline void PrintTo(char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const char*>(s), os);
-}
-
-// signed/unsigned char is often used for representing binary data, so
-// we print pointers to it as void* to be safe.
-inline void PrintTo(const signed char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-inline void PrintTo(signed char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-inline void PrintTo(const unsigned char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-inline void PrintTo(unsigned char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-
-// MSVC can be configured to define wchar_t as a typedef of unsigned
-// short.  It defines _NATIVE_WCHAR_T_DEFINED when wchar_t is a native
-// type.  When wchar_t is a typedef, defining an overload for const
-// wchar_t* would cause unsigned short* be printed as a wide string,
-// possibly causing invalid memory accesses.
-#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
-// Overloads for wide C strings
-GTEST_API_ void PrintTo(const wchar_t* s, ::std::ostream* os);
-inline void PrintTo(wchar_t* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const wchar_t*>(s), os);
-}
-#endif
-
-// Overload for C arrays.  Multi-dimensional arrays are printed
-// properly.
-
-// Prints the given number of elements in an array, without printing
-// the curly braces.
-template <typename T>
-void PrintRawArrayTo(const T a[], size_t count, ::std::ostream* os) {
-  UniversalPrint(a[0], os);
-  for (size_t i = 1; i != count; i++) {
-    *os << ", ";
-    UniversalPrint(a[i], os);
-  }
-}
-
-// Overloads for ::std::string.
-GTEST_API_ void PrintStringTo(const ::std::string&s, ::std::ostream* os);
-inline void PrintTo(const ::std::string& s, ::std::ostream* os) {
-  PrintStringTo(s, os);
-}
-
-// Overloads for ::std::wstring.
-#if GTEST_HAS_STD_WSTRING
-GTEST_API_ void PrintWideStringTo(const ::std::wstring&s, ::std::ostream* os);
-inline void PrintTo(const ::std::wstring& s, ::std::ostream* os) {
-  PrintWideStringTo(s, os);
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-#if GTEST_HAS_ABSL
-// Overload for absl::string_view.
-inline void PrintTo(absl::string_view sp, ::std::ostream* os) {
-  PrintTo(::std::string(sp), os);
-}
-#endif  // GTEST_HAS_ABSL
-
-inline void PrintTo(std::nullptr_t, ::std::ostream* os) { *os << "(nullptr)"; }
-
-template <typename T>
-void PrintTo(std::reference_wrapper<T> ref, ::std::ostream* os) {
-  UniversalPrinter<T&>::Print(ref.get(), os);
-}
-
-// Helper function for printing a tuple.  T must be instantiated with
-// a tuple type.
-template <typename T>
-void PrintTupleTo(const T&, std::integral_constant<size_t, 0>,
-                  ::std::ostream*) {}
-
-template <typename T, size_t I>
-void PrintTupleTo(const T& t, std::integral_constant<size_t, I>,
-                  ::std::ostream* os) {
-  PrintTupleTo(t, std::integral_constant<size_t, I - 1>(), os);
-  GTEST_INTENTIONAL_CONST_COND_PUSH_()
-  if (I > 1) {
-    GTEST_INTENTIONAL_CONST_COND_POP_()
-    *os << ", ";
-  }
-  UniversalPrinter<typename std::tuple_element<I - 1, T>::type>::Print(
-      std::get<I - 1>(t), os);
-}
-
-template <typename... Types>
-void PrintTo(const ::std::tuple<Types...>& t, ::std::ostream* os) {
-  *os << "(";
-  PrintTupleTo(t, std::integral_constant<size_t, sizeof...(Types)>(), os);
-  *os << ")";
-}
-
-// Overload for std::pair.
-template <typename T1, typename T2>
-void PrintTo(const ::std::pair<T1, T2>& value, ::std::ostream* os) {
-  *os << '(';
-  // We cannot use UniversalPrint(value.first, os) here, as T1 may be
-  // a reference type.  The same for printing value.second.
-  UniversalPrinter<T1>::Print(value.first, os);
-  *os << ", ";
-  UniversalPrinter<T2>::Print(value.second, os);
-  *os << ')';
-}
-
-// Implements printing a non-reference type T by letting the compiler
-// pick the right overload of PrintTo() for T.
-template <typename T>
-class UniversalPrinter {
- public:
-  // MSVC warns about adding const to a function type, so we want to
-  // disable the warning.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4180)
-
-  // Note: we deliberately don't call this PrintTo(), as that name
-  // conflicts with ::testing::internal::PrintTo in the body of the
-  // function.
-  static void Print(const T& value, ::std::ostream* os) {
-    // By default, ::testing::internal::PrintTo() is used for printing
-    // the value.
-    //
-    // Thanks to Koenig look-up, if T is a class and has its own
-    // PrintTo() function defined in its namespace, that function will
-    // be visible here.  Since it is more specific than the generic ones
-    // in ::testing::internal, it will be picked by the compiler in the
-    // following statement - exactly what we want.
-    PrintTo(value, os);
-  }
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-};
-
-#if GTEST_HAS_ABSL
-
-// Printer for absl::optional
-
-template <typename T>
-class UniversalPrinter<::absl::optional<T>> {
- public:
-  static void Print(const ::absl::optional<T>& value, ::std::ostream* os) {
-    *os << '(';
-    if (!value) {
-      *os << "nullopt";
-    } else {
-      UniversalPrint(*value, os);
-    }
-    *os << ')';
-  }
-};
-
-// Printer for absl::variant
-
-template <typename... T>
-class UniversalPrinter<::absl::variant<T...>> {
- public:
-  static void Print(const ::absl::variant<T...>& value, ::std::ostream* os) {
-    *os << '(';
-    absl::visit(Visitor{os}, value);
-    *os << ')';
-  }
-
- private:
-  struct Visitor {
-    template <typename U>
-    void operator()(const U& u) const {
-      *os << "'" << GetTypeName<U>() << "' with value ";
-      UniversalPrint(u, os);
-    }
-    ::std::ostream* os;
-  };
-};
-
-#endif  // GTEST_HAS_ABSL
-
-// UniversalPrintArray(begin, len, os) prints an array of 'len'
-// elements, starting at address 'begin'.
-template <typename T>
-void UniversalPrintArray(const T* begin, size_t len, ::std::ostream* os) {
-  if (len == 0) {
-    *os << "{}";
-  } else {
-    *os << "{ ";
-    const size_t kThreshold = 18;
-    const size_t kChunkSize = 8;
-    // If the array has more than kThreshold elements, we'll have to
-    // omit some details by printing only the first and the last
-    // kChunkSize elements.
-    if (len <= kThreshold) {
-      PrintRawArrayTo(begin, len, os);
-    } else {
-      PrintRawArrayTo(begin, kChunkSize, os);
-      *os << ", ..., ";
-      PrintRawArrayTo(begin + len - kChunkSize, kChunkSize, os);
-    }
-    *os << " }";
-  }
-}
-// This overload prints a (const) char array compactly.
-GTEST_API_ void UniversalPrintArray(
-    const char* begin, size_t len, ::std::ostream* os);
-
-// This overload prints a (const) wchar_t array compactly.
-GTEST_API_ void UniversalPrintArray(
-    const wchar_t* begin, size_t len, ::std::ostream* os);
-
-// Implements printing an array type T[N].
-template <typename T, size_t N>
-class UniversalPrinter<T[N]> {
- public:
-  // Prints the given array, omitting some elements when there are too
-  // many.
-  static void Print(const T (&a)[N], ::std::ostream* os) {
-    UniversalPrintArray(a, N, os);
-  }
-};
-
-// Implements printing a reference type T&.
-template <typename T>
-class UniversalPrinter<T&> {
- public:
-  // MSVC warns about adding const to a function type, so we want to
-  // disable the warning.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4180)
-
-  static void Print(const T& value, ::std::ostream* os) {
-    // Prints the address of the value.  We use reinterpret_cast here
-    // as static_cast doesn't compile when T is a function type.
-    *os << "@" << reinterpret_cast<const void*>(&value) << " ";
-
-    // Then prints the value itself.
-    UniversalPrint(value, os);
-  }
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-};
-
-// Prints a value tersely: for a reference type, the referenced value
-// (but not the address) is printed; for a (const) char pointer, the
-// NUL-terminated string (but not the pointer) is printed.
-
-template <typename T>
-class UniversalTersePrinter {
- public:
-  static void Print(const T& value, ::std::ostream* os) {
-    UniversalPrint(value, os);
-  }
-};
-template <typename T>
-class UniversalTersePrinter<T&> {
- public:
-  static void Print(const T& value, ::std::ostream* os) {
-    UniversalPrint(value, os);
-  }
-};
-template <typename T, size_t N>
-class UniversalTersePrinter<T[N]> {
- public:
-  static void Print(const T (&value)[N], ::std::ostream* os) {
-    UniversalPrinter<T[N]>::Print(value, os);
-  }
-};
-template <>
-class UniversalTersePrinter<const char*> {
- public:
-  static void Print(const char* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(std::string(str), os);
-    }
-  }
-};
-template <>
-class UniversalTersePrinter<char*> {
- public:
-  static void Print(char* str, ::std::ostream* os) {
-    UniversalTersePrinter<const char*>::Print(str, os);
-  }
-};
-
-#if GTEST_HAS_STD_WSTRING
-template <>
-class UniversalTersePrinter<const wchar_t*> {
- public:
-  static void Print(const wchar_t* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(::std::wstring(str), os);
-    }
-  }
-};
-#endif
-
-template <>
-class UniversalTersePrinter<wchar_t*> {
- public:
-  static void Print(wchar_t* str, ::std::ostream* os) {
-    UniversalTersePrinter<const wchar_t*>::Print(str, os);
-  }
-};
-
-template <typename T>
-void UniversalTersePrint(const T& value, ::std::ostream* os) {
-  UniversalTersePrinter<T>::Print(value, os);
-}
-
-// Prints a value using the type inferred by the compiler.  The
-// difference between this and UniversalTersePrint() is that for a
-// (const) char pointer, this prints both the pointer and the
-// NUL-terminated string.
-template <typename T>
-void UniversalPrint(const T& value, ::std::ostream* os) {
-  // A workarond for the bug in VC++ 7.1 that prevents us from instantiating
-  // UniversalPrinter with T directly.
-  typedef T T1;
-  UniversalPrinter<T1>::Print(value, os);
-}
-
-typedef ::std::vector< ::std::string> Strings;
-
-  // Tersely prints the first N fields of a tuple to a string vector,
-  // one element for each field.
-template <typename Tuple>
-void TersePrintPrefixToStrings(const Tuple&, std::integral_constant<size_t, 0>,
-                               Strings*) {}
-template <typename Tuple, size_t I>
-void TersePrintPrefixToStrings(const Tuple& t,
-                               std::integral_constant<size_t, I>,
-                               Strings* strings) {
-  TersePrintPrefixToStrings(t, std::integral_constant<size_t, I - 1>(),
-                            strings);
-  ::std::stringstream ss;
-  UniversalTersePrint(std::get<I - 1>(t), &ss);
-  strings->push_back(ss.str());
-}
-
-// Prints the fields of a tuple tersely to a string vector, one
-// element for each field.  See the comment before
-// UniversalTersePrint() for how we define "tersely".
-template <typename Tuple>
-Strings UniversalTersePrintTupleFieldsToStrings(const Tuple& value) {
-  Strings result;
-  TersePrintPrefixToStrings(
-      value, std::integral_constant<size_t, std::tuple_size<Tuple>::value>(),
-      &result);
-  return result;
-}
-
-}  // namespace internal
-
-#if GTEST_HAS_ABSL
-namespace internal2 {
-template <typename T>
-void TypeWithoutFormatter<T, kConvertibleToStringView>::PrintValue(
-    const T& value, ::std::ostream* os) {
-  internal::PrintTo(absl::string_view(value), os);
-}
-}  // namespace internal2
-#endif
-
-template <typename T>
-::std::string PrintToString(const T& value) {
-  ::std::stringstream ss;
-  internal::UniversalTersePrinter<T>::Print(value, &ss);
-  return ss.str();
-}
-
-}  // namespace testing
-
-// Include any custom printer added by the local installation.
-// We must include this header at the end to make sure it can use the
-// declarations from this file.
-#include "gtest/internal/custom/gtest-printers.h"
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-spi.h b/3rdparty/gtest/include/gtest/gtest-spi.h
deleted file mode 100644
index aa38870e..00000000
--- a/3rdparty/gtest/include/gtest/gtest-spi.h
+++ /dev/null
@@ -1,238 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Utilities for testing Google Test itself and code that uses Google Test
-// (e.g. frameworks built on top of Google Test).
-
-// GOOGLETEST_CM0004 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_SPI_H_
-#define GTEST_INCLUDE_GTEST_GTEST_SPI_H_
-
-#include "gtest/gtest.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// This helper class can be used to mock out Google Test failure reporting
-// so that we can test Google Test or code that builds on Google Test.
-//
-// An object of this class appends a TestPartResult object to the
-// TestPartResultArray object given in the constructor whenever a Google Test
-// failure is reported. It can either intercept only failures that are
-// generated in the same thread that created this object or it can intercept
-// all generated failures. The scope of this mock object can be controlled with
-// the second argument to the two arguments constructor.
-class GTEST_API_ ScopedFakeTestPartResultReporter
-    : public TestPartResultReporterInterface {
- public:
-  // The two possible mocking modes of this object.
-  enum InterceptMode {
-    INTERCEPT_ONLY_CURRENT_THREAD,  // Intercepts only thread local failures.
-    INTERCEPT_ALL_THREADS           // Intercepts all failures.
-  };
-
-  // The c'tor sets this object as the test part result reporter used
-  // by Google Test.  The 'result' parameter specifies where to report the
-  // results. This reporter will only catch failures generated in the current
-  // thread. DEPRECATED
-  explicit ScopedFakeTestPartResultReporter(TestPartResultArray* result);
-
-  // Same as above, but you can choose the interception scope of this object.
-  ScopedFakeTestPartResultReporter(InterceptMode intercept_mode,
-                                   TestPartResultArray* result);
-
-  // The d'tor restores the previous test part result reporter.
-  ~ScopedFakeTestPartResultReporter() override;
-
-  // Appends the TestPartResult object to the TestPartResultArray
-  // received in the constructor.
-  //
-  // This method is from the TestPartResultReporterInterface
-  // interface.
-  void ReportTestPartResult(const TestPartResult& result) override;
-
- private:
-  void Init();
-
-  const InterceptMode intercept_mode_;
-  TestPartResultReporterInterface* old_reporter_;
-  TestPartResultArray* const result_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedFakeTestPartResultReporter);
-};
-
-namespace internal {
-
-// A helper class for implementing EXPECT_FATAL_FAILURE() and
-// EXPECT_NONFATAL_FAILURE().  Its destructor verifies that the given
-// TestPartResultArray contains exactly one failure that has the given
-// type and contains the given substring.  If that's not the case, a
-// non-fatal failure will be generated.
-class GTEST_API_ SingleFailureChecker {
- public:
-  // The constructor remembers the arguments.
-  SingleFailureChecker(const TestPartResultArray* results,
-                       TestPartResult::Type type, const std::string& substr);
-  ~SingleFailureChecker();
- private:
-  const TestPartResultArray* const results_;
-  const TestPartResult::Type type_;
-  const std::string substr_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(SingleFailureChecker);
-};
-
-}  // namespace internal
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// A set of macros for testing Google Test assertions or code that's expected
-// to generate Google Test fatal failures.  It verifies that the given
-// statement will cause exactly one fatal Google Test failure with 'substr'
-// being part of the failure message.
-//
-// There are two different versions of this macro. EXPECT_FATAL_FAILURE only
-// affects and considers failures generated in the current thread and
-// EXPECT_FATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
-//
-// The verification of the assertion is done correctly even when the statement
-// throws an exception or aborts the current function.
-//
-// Known restrictions:
-//   - 'statement' cannot reference local non-static variables or
-//     non-static members of the current object.
-//   - 'statement' cannot return a value.
-//   - You cannot stream a failure message to this macro.
-//
-// Note that even though the implementations of the following two
-// macros are much alike, we cannot refactor them to use a common
-// helper macro, due to some peculiarity in how the preprocessor
-// works.  The AcceptsMacroThatExpandsToUnprotectedComma test in
-// gtest_unittest.cc will fail to compile if we do that.
-#define EXPECT_FATAL_FAILURE(statement, substr) \
-  do { \
-    class GTestExpectFatalFailureHelper {\
-     public:\
-      static void Execute() { statement; }\
-    };\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
-      GTestExpectFatalFailureHelper::Execute();\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#define EXPECT_FATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
-  do { \
-    class GTestExpectFatalFailureHelper {\
-     public:\
-      static void Execute() { statement; }\
-    };\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ALL_THREADS, &gtest_failures);\
-      GTestExpectFatalFailureHelper::Execute();\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-// A macro for testing Google Test assertions or code that's expected to
-// generate Google Test non-fatal failures.  It asserts that the given
-// statement will cause exactly one non-fatal Google Test failure with 'substr'
-// being part of the failure message.
-//
-// There are two different versions of this macro. EXPECT_NONFATAL_FAILURE only
-// affects and considers failures generated in the current thread and
-// EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
-//
-// 'statement' is allowed to reference local variables and members of
-// the current object.
-//
-// The verification of the assertion is done correctly even when the statement
-// throws an exception or aborts the current function.
-//
-// Known restrictions:
-//   - You cannot stream a failure message to this macro.
-//
-// Note that even though the implementations of the following two
-// macros are much alike, we cannot refactor them to use a common
-// helper macro, due to some peculiarity in how the preprocessor
-// works.  If we do that, the code won't compile when the user gives
-// EXPECT_NONFATAL_FAILURE() a statement that contains a macro that
-// expands to code containing an unprotected comma.  The
-// AcceptsMacroThatExpandsToUnprotectedComma test in gtest_unittest.cc
-// catches that.
-//
-// For the same reason, we have to write
-//   if (::testing::internal::AlwaysTrue()) { statement; }
-// instead of
-//   GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
-// to avoid an MSVC warning on unreachable code.
-#define EXPECT_NONFATAL_FAILURE(statement, substr) \
-  do {\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
-        (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
-      if (::testing::internal::AlwaysTrue()) { statement; }\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#define EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
-  do {\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
-        (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter::INTERCEPT_ALL_THREADS, \
-          &gtest_failures);\
-      if (::testing::internal::AlwaysTrue()) { statement; }\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_SPI_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-test-part.h b/3rdparty/gtest/include/gtest/gtest-test-part.h
deleted file mode 100644
index 05a79853..00000000
--- a/3rdparty/gtest/include/gtest/gtest-test-part.h
+++ /dev/null
@@ -1,184 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
-#define GTEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
-
-#include <iosfwd>
-#include <vector>
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-string.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// A copyable object representing the result of a test part (i.e. an
-// assertion or an explicit FAIL(), ADD_FAILURE(), or SUCCESS()).
-//
-// Don't inherit from TestPartResult as its destructor is not virtual.
-class GTEST_API_ TestPartResult {
- public:
-  // The possible outcomes of a test part (i.e. an assertion or an
-  // explicit SUCCEED(), FAIL(), or ADD_FAILURE()).
-  enum Type {
-    kSuccess,          // Succeeded.
-    kNonFatalFailure,  // Failed but the test can continue.
-    kFatalFailure,     // Failed and the test should be terminated.
-    kSkip              // Skipped.
-  };
-
-  // C'tor.  TestPartResult does NOT have a default constructor.
-  // Always use this constructor (with parameters) to create a
-  // TestPartResult object.
-  TestPartResult(Type a_type, const char* a_file_name, int a_line_number,
-                 const char* a_message)
-      : type_(a_type),
-        file_name_(a_file_name == nullptr ? "" : a_file_name),
-        line_number_(a_line_number),
-        summary_(ExtractSummary(a_message)),
-        message_(a_message) {}
-
-  // Gets the outcome of the test part.
-  Type type() const { return type_; }
-
-  // Gets the name of the source file where the test part took place, or
-  // NULL if it's unknown.
-  const char* file_name() const {
-    return file_name_.empty() ? nullptr : file_name_.c_str();
-  }
-
-  // Gets the line in the source file where the test part took place,
-  // or -1 if it's unknown.
-  int line_number() const { return line_number_; }
-
-  // Gets the summary of the failure message.
-  const char* summary() const { return summary_.c_str(); }
-
-  // Gets the message associated with the test part.
-  const char* message() const { return message_.c_str(); }
-
-  // Returns true if and only if the test part was skipped.
-  bool skipped() const { return type_ == kSkip; }
-
-  // Returns true if and only if the test part passed.
-  bool passed() const { return type_ == kSuccess; }
-
-  // Returns true if and only if the test part non-fatally failed.
-  bool nonfatally_failed() const { return type_ == kNonFatalFailure; }
-
-  // Returns true if and only if the test part fatally failed.
-  bool fatally_failed() const { return type_ == kFatalFailure; }
-
-  // Returns true if and only if the test part failed.
-  bool failed() const { return fatally_failed() || nonfatally_failed(); }
-
- private:
-  Type type_;
-
-  // Gets the summary of the failure message by omitting the stack
-  // trace in it.
-  static std::string ExtractSummary(const char* message);
-
-  // The name of the source file where the test part took place, or
-  // "" if the source file is unknown.
-  std::string file_name_;
-  // The line in the source file where the test part took place, or -1
-  // if the line number is unknown.
-  int line_number_;
-  std::string summary_;  // The test failure summary.
-  std::string message_;  // The test failure message.
-};
-
-// Prints a TestPartResult object.
-std::ostream& operator<<(std::ostream& os, const TestPartResult& result);
-
-// An array of TestPartResult objects.
-//
-// Don't inherit from TestPartResultArray as its destructor is not
-// virtual.
-class GTEST_API_ TestPartResultArray {
- public:
-  TestPartResultArray() {}
-
-  // Appends the given TestPartResult to the array.
-  void Append(const TestPartResult& result);
-
-  // Returns the TestPartResult at the given index (0-based).
-  const TestPartResult& GetTestPartResult(int index) const;
-
-  // Returns the number of TestPartResult objects in the array.
-  int size() const;
-
- private:
-  std::vector<TestPartResult> array_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestPartResultArray);
-};
-
-// This interface knows how to report a test part result.
-class GTEST_API_ TestPartResultReporterInterface {
- public:
-  virtual ~TestPartResultReporterInterface() {}
-
-  virtual void ReportTestPartResult(const TestPartResult& result) = 0;
-};
-
-namespace internal {
-
-// This helper class is used by {ASSERT|EXPECT}_NO_FATAL_FAILURE to check if a
-// statement generates new fatal failures. To do so it registers itself as the
-// current test part result reporter. Besides checking if fatal failures were
-// reported, it only delegates the reporting to the former result reporter.
-// The original result reporter is restored in the destructor.
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-class GTEST_API_ HasNewFatalFailureHelper
-    : public TestPartResultReporterInterface {
- public:
-  HasNewFatalFailureHelper();
-  ~HasNewFatalFailureHelper() override;
-  void ReportTestPartResult(const TestPartResult& result) override;
-  bool has_new_fatal_failure() const { return has_new_fatal_failure_; }
- private:
-  bool has_new_fatal_failure_;
-  TestPartResultReporterInterface* original_reporter_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(HasNewFatalFailureHelper);
-};
-
-}  // namespace internal
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-typed-test.h b/3rdparty/gtest/include/gtest/gtest-typed-test.h
deleted file mode 100644
index 095ce058..00000000
--- a/3rdparty/gtest/include/gtest/gtest-typed-test.h
+++ /dev/null
@@ -1,330 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
-#define GTEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
-
-// This header implements typed tests and type-parameterized tests.
-
-// Typed (aka type-driven) tests repeat the same test for types in a
-// list.  You must know which types you want to test with when writing
-// typed tests. Here's how you do it:
-
-#if 0
-
-// First, define a fixture class template.  It should be parameterized
-// by a type.  Remember to derive it from testing::Test.
-template <typename T>
-class FooTest : public testing::Test {
- public:
-  ...
-  typedef std::list<T> List;
-  static T shared_;
-  T value_;
-};
-
-// Next, associate a list of types with the test suite, which will be
-// repeated for each type in the list.  The typedef is necessary for
-// the macro to parse correctly.
-typedef testing::Types<char, int, unsigned int> MyTypes;
-TYPED_TEST_SUITE(FooTest, MyTypes);
-
-// If the type list contains only one type, you can write that type
-// directly without Types<...>:
-//   TYPED_TEST_SUITE(FooTest, int);
-
-// Then, use TYPED_TEST() instead of TEST_F() to define as many typed
-// tests for this test suite as you want.
-TYPED_TEST(FooTest, DoesBlah) {
-  // Inside a test, refer to the special name TypeParam to get the type
-  // parameter.  Since we are inside a derived class template, C++ requires
-  // us to visit the members of FooTest via 'this'.
-  TypeParam n = this->value_;
-
-  // To visit static members of the fixture, add the TestFixture::
-  // prefix.
-  n += TestFixture::shared_;
-
-  // To refer to typedefs in the fixture, add the "typename
-  // TestFixture::" prefix.
-  typename TestFixture::List values;
-  values.push_back(n);
-  ...
-}
-
-TYPED_TEST(FooTest, HasPropertyA) { ... }
-
-// TYPED_TEST_SUITE takes an optional third argument which allows to specify a
-// class that generates custom test name suffixes based on the type. This should
-// be a class which has a static template function GetName(int index) returning
-// a string for each type. The provided integer index equals the index of the
-// type in the provided type list. In many cases the index can be ignored.
-//
-// For example:
-//   class MyTypeNames {
-//    public:
-//     template <typename T>
-//     static std::string GetName(int) {
-//       if (std::is_same<T, char>()) return "char";
-//       if (std::is_same<T, int>()) return "int";
-//       if (std::is_same<T, unsigned int>()) return "unsignedInt";
-//     }
-//   };
-//   TYPED_TEST_SUITE(FooTest, MyTypes, MyTypeNames);
-
-#endif  // 0
-
-// Type-parameterized tests are abstract test patterns parameterized
-// by a type.  Compared with typed tests, type-parameterized tests
-// allow you to define the test pattern without knowing what the type
-// parameters are.  The defined pattern can be instantiated with
-// different types any number of times, in any number of translation
-// units.
-//
-// If you are designing an interface or concept, you can define a
-// suite of type-parameterized tests to verify properties that any
-// valid implementation of the interface/concept should have.  Then,
-// each implementation can easily instantiate the test suite to verify
-// that it conforms to the requirements, without having to write
-// similar tests repeatedly.  Here's an example:
-
-#if 0
-
-// First, define a fixture class template.  It should be parameterized
-// by a type.  Remember to derive it from testing::Test.
-template <typename T>
-class FooTest : public testing::Test {
-  ...
-};
-
-// Next, declare that you will define a type-parameterized test suite
-// (the _P suffix is for "parameterized" or "pattern", whichever you
-// prefer):
-TYPED_TEST_SUITE_P(FooTest);
-
-// Then, use TYPED_TEST_P() to define as many type-parameterized tests
-// for this type-parameterized test suite as you want.
-TYPED_TEST_P(FooTest, DoesBlah) {
-  // Inside a test, refer to TypeParam to get the type parameter.
-  TypeParam n = 0;
-  ...
-}
-
-TYPED_TEST_P(FooTest, HasPropertyA) { ... }
-
-// Now the tricky part: you need to register all test patterns before
-// you can instantiate them.  The first argument of the macro is the
-// test suite name; the rest are the names of the tests in this test
-// case.
-REGISTER_TYPED_TEST_SUITE_P(FooTest,
-                            DoesBlah, HasPropertyA);
-
-// Finally, you are free to instantiate the pattern with the types you
-// want.  If you put the above code in a header file, you can #include
-// it in multiple C++ source files and instantiate it multiple times.
-//
-// To distinguish different instances of the pattern, the first
-// argument to the INSTANTIATE_* macro is a prefix that will be added
-// to the actual test suite name.  Remember to pick unique prefixes for
-// different instances.
-typedef testing::Types<char, int, unsigned int> MyTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes);
-
-// If the type list contains only one type, you can write that type
-// directly without Types<...>:
-//   INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, int);
-//
-// Similar to the optional argument of TYPED_TEST_SUITE above,
-// INSTANTIATE_TEST_SUITE_P takes an optional fourth argument which allows to
-// generate custom names.
-//   INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes, MyTypeNames);
-
-#endif  // 0
-
-#include "gtest/internal/gtest-port.h"
-#include "gtest/internal/gtest-type-util.h"
-
-// Implements typed tests.
-
-#if GTEST_HAS_TYPED_TEST
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Expands to the name of the typedef for the type parameters of the
-// given test suite.
-#define GTEST_TYPE_PARAMS_(TestSuiteName) gtest_type_params_##TestSuiteName##_
-
-// Expands to the name of the typedef for the NameGenerator, responsible for
-// creating the suffixes of the name.
-#define GTEST_NAME_GENERATOR_(TestSuiteName) \
-  gtest_type_params_##TestSuiteName##_NameGenerator
-
-#define TYPED_TEST_SUITE(CaseName, Types, ...)                           \
-  typedef ::testing::internal::TypeList<Types>::type GTEST_TYPE_PARAMS_( \
-      CaseName);                                                         \
-  typedef ::testing::internal::NameGeneratorSelector<__VA_ARGS__>::type  \
-      GTEST_NAME_GENERATOR_(CaseName)
-
-# define TYPED_TEST(CaseName, TestName)                                       \
-  template <typename gtest_TypeParam_>                                        \
-  class GTEST_TEST_CLASS_NAME_(CaseName, TestName)                            \
-      : public CaseName<gtest_TypeParam_> {                                   \
-   private:                                                                   \
-    typedef CaseName<gtest_TypeParam_> TestFixture;                           \
-    typedef gtest_TypeParam_ TypeParam;                                       \
-    virtual void TestBody();                                                  \
-  };                                                                          \
-  static bool gtest_##CaseName##_##TestName##_registered_                     \
-        GTEST_ATTRIBUTE_UNUSED_ =                                             \
-      ::testing::internal::TypeParameterizedTest<                             \
-          CaseName,                                                           \
-          ::testing::internal::TemplateSel<GTEST_TEST_CLASS_NAME_(CaseName,   \
-                                                                  TestName)>, \
-          GTEST_TYPE_PARAMS_(                                                 \
-              CaseName)>::Register("",                                        \
-                                   ::testing::internal::CodeLocation(         \
-                                       __FILE__, __LINE__),                   \
-                                   #CaseName, #TestName, 0,                   \
-                                   ::testing::internal::GenerateNames<        \
-                                       GTEST_NAME_GENERATOR_(CaseName),       \
-                                       GTEST_TYPE_PARAMS_(CaseName)>());      \
-  template <typename gtest_TypeParam_>                                        \
-  void GTEST_TEST_CLASS_NAME_(CaseName,                                       \
-                              TestName)<gtest_TypeParam_>::TestBody()
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define TYPED_TEST_CASE                                                \
-  static_assert(::testing::internal::TypedTestCaseIsDeprecated(), ""); \
-  TYPED_TEST_SUITE
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#endif  // GTEST_HAS_TYPED_TEST
-
-// Implements type-parameterized tests.
-
-#if GTEST_HAS_TYPED_TEST_P
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Expands to the namespace name that the type-parameterized tests for
-// the given type-parameterized test suite are defined in.  The exact
-// name of the namespace is subject to change without notice.
-#define GTEST_SUITE_NAMESPACE_(TestSuiteName) gtest_suite_##TestSuiteName##_
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Expands to the name of the variable used to remember the names of
-// the defined tests in the given test suite.
-#define GTEST_TYPED_TEST_SUITE_P_STATE_(TestSuiteName) \
-  gtest_typed_test_suite_p_state_##TestSuiteName##_
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE DIRECTLY.
-//
-// Expands to the name of the variable used to remember the names of
-// the registered tests in the given test suite.
-#define GTEST_REGISTERED_TEST_NAMES_(TestSuiteName) \
-  gtest_registered_test_names_##TestSuiteName##_
-
-// The variables defined in the type-parameterized test macros are
-// static as typically these macros are used in a .h file that can be
-// #included in multiple translation units linked together.
-#define TYPED_TEST_SUITE_P(SuiteName)              \
-  static ::testing::internal::TypedTestSuitePState \
-      GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName)
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define TYPED_TEST_CASE_P                                                 \
-  static_assert(::testing::internal::TypedTestCase_P_IsDeprecated(), ""); \
-  TYPED_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#define TYPED_TEST_P(SuiteName, TestName)                             \
-  namespace GTEST_SUITE_NAMESPACE_(SuiteName) {                       \
-    template <typename gtest_TypeParam_>                              \
-    class TestName : public SuiteName<gtest_TypeParam_> {             \
-     private:                                                         \
-      typedef SuiteName<gtest_TypeParam_> TestFixture;                \
-      typedef gtest_TypeParam_ TypeParam;                             \
-      virtual void TestBody();                                        \
-    };                                                                \
-    static bool gtest_##TestName##_defined_ GTEST_ATTRIBUTE_UNUSED_ = \
-        GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName).AddTestName(       \
-            __FILE__, __LINE__, #SuiteName, #TestName);               \
-  }                                                                   \
-  template <typename gtest_TypeParam_>                                \
-  void GTEST_SUITE_NAMESPACE_(                                        \
-      SuiteName)::TestName<gtest_TypeParam_>::TestBody()
-
-#define REGISTER_TYPED_TEST_SUITE_P(SuiteName, ...)                            \
-  namespace GTEST_SUITE_NAMESPACE_(SuiteName) {                                \
-    typedef ::testing::internal::Templates<__VA_ARGS__>::type gtest_AllTests_; \
-  }                                                                            \
-  static const char* const GTEST_REGISTERED_TEST_NAMES_(                       \
-      SuiteName) GTEST_ATTRIBUTE_UNUSED_ =                                     \
-      GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName).VerifyRegisteredTestNames(    \
-          __FILE__, __LINE__, #__VA_ARGS__)
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define REGISTER_TYPED_TEST_CASE_P                                           \
-  static_assert(::testing::internal::RegisterTypedTestCase_P_IsDeprecated(), \
-                "");                                                         \
-  REGISTER_TYPED_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#define INSTANTIATE_TYPED_TEST_SUITE_P(Prefix, SuiteName, Types, ...)       \
-  static bool gtest_##Prefix##_##SuiteName GTEST_ATTRIBUTE_UNUSED_ =        \
-      ::testing::internal::TypeParameterizedTestSuite<                      \
-          SuiteName, GTEST_SUITE_NAMESPACE_(SuiteName)::gtest_AllTests_,    \
-          ::testing::internal::TypeList<Types>::type>::                     \
-          Register(#Prefix,                                                 \
-                   ::testing::internal::CodeLocation(__FILE__, __LINE__),   \
-                   &GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName), #SuiteName, \
-                   GTEST_REGISTERED_TEST_NAMES_(SuiteName),                 \
-                   ::testing::internal::GenerateNames<                      \
-                       ::testing::internal::NameGeneratorSelector<          \
-                           __VA_ARGS__>::type,                              \
-                       ::testing::internal::TypeList<Types>::type>())
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define INSTANTIATE_TYPED_TEST_CASE_P                                      \
-  static_assert(                                                           \
-      ::testing::internal::InstantiateTypedTestCase_P_IsDeprecated(), ""); \
-  INSTANTIATE_TYPED_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
diff --git a/3rdparty/gtest/include/gtest/gtest.h b/3rdparty/gtest/include/gtest/gtest.h
deleted file mode 100644
index dbe5b1c2..00000000
--- a/3rdparty/gtest/include/gtest/gtest.h
+++ /dev/null
@@ -1,2478 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the public API for Google Test.  It should be
-// included by any test program that uses Google Test.
-//
-// IMPORTANT NOTE: Due to limitation of the C++ language, we have to
-// leave some internal implementation details in this header file.
-// They are clearly marked by comments like this:
-//
-//   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-//
-// Such code is NOT meant to be used by a user directly, and is subject
-// to CHANGE WITHOUT NOTICE.  Therefore DO NOT DEPEND ON IT in a user
-// program!
-//
-// Acknowledgment: Google Test borrowed the idea of automatic test
-// registration from Barthelemy Dagenais' (barthelemy@prologique.com)
-// easyUnit framework.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_H_
-#define GTEST_INCLUDE_GTEST_GTEST_H_
-
-#include <cstddef>
-#include <limits>
-#include <memory>
-#include <ostream>
-#include <type_traits>
-#include <vector>
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-string.h"
-#include "gtest/gtest-death-test.h"
-#include "gtest/gtest-matchers.h"
-#include "gtest/gtest-message.h"
-#include "gtest/gtest-param-test.h"
-#include "gtest/gtest-printers.h"
-#include "gtest/gtest_prod.h"
-#include "gtest/gtest-test-part.h"
-#include "gtest/gtest-typed-test.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// Silence C4100 (unreferenced formal parameter) and 4805
-// unsafe mix of type 'const int' and type 'const bool'
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4805)
-# pragma warning(disable:4100)
-#endif
-
-
-// Declares the flags.
-
-// This flag temporary enables the disabled tests.
-GTEST_DECLARE_bool_(also_run_disabled_tests);
-
-// This flag brings the debugger on an assertion failure.
-GTEST_DECLARE_bool_(break_on_failure);
-
-// This flag controls whether Google Test catches all test-thrown exceptions
-// and logs them as failures.
-GTEST_DECLARE_bool_(catch_exceptions);
-
-// This flag enables using colors in terminal output. Available values are
-// "yes" to enable colors, "no" (disable colors), or "auto" (the default)
-// to let Google Test decide.
-GTEST_DECLARE_string_(color);
-
-// This flag sets up the filter to select by name using a glob pattern
-// the tests to run. If the filter is not given all tests are executed.
-GTEST_DECLARE_string_(filter);
-
-// This flag controls whether Google Test installs a signal handler that dumps
-// debugging information when fatal signals are raised.
-GTEST_DECLARE_bool_(install_failure_signal_handler);
-
-// This flag causes the Google Test to list tests. None of the tests listed
-// are actually run if the flag is provided.
-GTEST_DECLARE_bool_(list_tests);
-
-// This flag controls whether Google Test emits a detailed XML report to a file
-// in addition to its normal textual output.
-GTEST_DECLARE_string_(output);
-
-// This flags control whether Google Test prints the elapsed time for each
-// test.
-GTEST_DECLARE_bool_(print_time);
-
-// This flags control whether Google Test prints UTF8 characters as text.
-GTEST_DECLARE_bool_(print_utf8);
-
-// This flag specifies the random number seed.
-GTEST_DECLARE_int32_(random_seed);
-
-// This flag sets how many times the tests are repeated. The default value
-// is 1. If the value is -1 the tests are repeating forever.
-GTEST_DECLARE_int32_(repeat);
-
-// This flag controls whether Google Test includes Google Test internal
-// stack frames in failure stack traces.
-GTEST_DECLARE_bool_(show_internal_stack_frames);
-
-// When this flag is specified, tests' order is randomized on every iteration.
-GTEST_DECLARE_bool_(shuffle);
-
-// This flag specifies the maximum number of stack frames to be
-// printed in a failure message.
-GTEST_DECLARE_int32_(stack_trace_depth);
-
-// When this flag is specified, a failed assertion will throw an
-// exception if exceptions are enabled, or exit the program with a
-// non-zero code otherwise. For use with an external test framework.
-GTEST_DECLARE_bool_(throw_on_failure);
-
-// When this flag is set with a "host:port" string, on supported
-// platforms test results are streamed to the specified port on
-// the specified host machine.
-GTEST_DECLARE_string_(stream_result_to);
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-GTEST_DECLARE_string_(flagfile);
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-// The upper limit for valid stack trace depths.
-const int kMaxStackTraceDepth = 100;
-
-namespace internal {
-
-class AssertHelper;
-class DefaultGlobalTestPartResultReporter;
-class ExecDeathTest;
-class NoExecDeathTest;
-class FinalSuccessChecker;
-class GTestFlagSaver;
-class StreamingListenerTest;
-class TestResultAccessor;
-class TestEventListenersAccessor;
-class TestEventRepeater;
-class UnitTestRecordPropertyTestHelper;
-class WindowsDeathTest;
-class FuchsiaDeathTest;
-class UnitTestImpl* GetUnitTestImpl();
-void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
-                                    const std::string& message);
-
-}  // namespace internal
-
-// The friend relationship of some of these classes is cyclic.
-// If we don't forward declare them the compiler might confuse the classes
-// in friendship clauses with same named classes on the scope.
-class Test;
-class TestSuite;
-
-// Old API is still available but deprecated
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-using TestCase = TestSuite;
-#endif
-class TestInfo;
-class UnitTest;
-
-// A class for indicating whether an assertion was successful.  When
-// the assertion wasn't successful, the AssertionResult object
-// remembers a non-empty message that describes how it failed.
-//
-// To create an instance of this class, use one of the factory functions
-// (AssertionSuccess() and AssertionFailure()).
-//
-// This class is useful for two purposes:
-//   1. Defining predicate functions to be used with Boolean test assertions
-//      EXPECT_TRUE/EXPECT_FALSE and their ASSERT_ counterparts
-//   2. Defining predicate-format functions to be
-//      used with predicate assertions (ASSERT_PRED_FORMAT*, etc).
-//
-// For example, if you define IsEven predicate:
-//
-//   testing::AssertionResult IsEven(int n) {
-//     if ((n % 2) == 0)
-//       return testing::AssertionSuccess();
-//     else
-//       return testing::AssertionFailure() << n << " is odd";
-//   }
-//
-// Then the failed expectation EXPECT_TRUE(IsEven(Fib(5)))
-// will print the message
-//
-//   Value of: IsEven(Fib(5))
-//     Actual: false (5 is odd)
-//   Expected: true
-//
-// instead of a more opaque
-//
-//   Value of: IsEven(Fib(5))
-//     Actual: false
-//   Expected: true
-//
-// in case IsEven is a simple Boolean predicate.
-//
-// If you expect your predicate to be reused and want to support informative
-// messages in EXPECT_FALSE and ASSERT_FALSE (negative assertions show up
-// about half as often as positive ones in our tests), supply messages for
-// both success and failure cases:
-//
-//   testing::AssertionResult IsEven(int n) {
-//     if ((n % 2) == 0)
-//       return testing::AssertionSuccess() << n << " is even";
-//     else
-//       return testing::AssertionFailure() << n << " is odd";
-//   }
-//
-// Then a statement EXPECT_FALSE(IsEven(Fib(6))) will print
-//
-//   Value of: IsEven(Fib(6))
-//     Actual: true (8 is even)
-//   Expected: false
-//
-// NB: Predicates that support negative Boolean assertions have reduced
-// performance in positive ones so be careful not to use them in tests
-// that have lots (tens of thousands) of positive Boolean assertions.
-//
-// To use this class with EXPECT_PRED_FORMAT assertions such as:
-//
-//   // Verifies that Foo() returns an even number.
-//   EXPECT_PRED_FORMAT1(IsEven, Foo());
-//
-// you need to define:
-//
-//   testing::AssertionResult IsEven(const char* expr, int n) {
-//     if ((n % 2) == 0)
-//       return testing::AssertionSuccess();
-//     else
-//       return testing::AssertionFailure()
-//         << "Expected: " << expr << " is even\n  Actual: it's " << n;
-//   }
-//
-// If Foo() returns 5, you will see the following message:
-//
-//   Expected: Foo() is even
-//     Actual: it's 5
-//
-class GTEST_API_ AssertionResult {
- public:
-  // Copy constructor.
-  // Used in EXPECT_TRUE/FALSE(assertion_result).
-  AssertionResult(const AssertionResult& other);
-
-#if defined(_MSC_VER) && _MSC_VER < 1910
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 /* forcing value to bool */)
-#endif
-
-  // Used in the EXPECT_TRUE/FALSE(bool_expression).
-  //
-  // T must be contextually convertible to bool.
-  //
-  // The second parameter prevents this overload from being considered if
-  // the argument is implicitly convertible to AssertionResult. In that case
-  // we want AssertionResult's copy constructor to be used.
-  template <typename T>
-  explicit AssertionResult(
-      const T& success,
-      typename std::enable_if<
-          !std::is_convertible<T, AssertionResult>::value>::type*
-      /*enabler*/
-      = nullptr)
-      : success_(success) {}
-
-#if defined(_MSC_VER) && _MSC_VER < 1910
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-#endif
-
-  // Assignment operator.
-  AssertionResult& operator=(AssertionResult other) {
-    swap(other);
-    return *this;
-  }
-
-  // Returns true if and only if the assertion succeeded.
-  operator bool() const { return success_; }  // NOLINT
-
-  // Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
-  AssertionResult operator!() const;
-
-  // Returns the text streamed into this AssertionResult. Test assertions
-  // use it when they fail (i.e., the predicate's outcome doesn't match the
-  // assertion's expectation). When nothing has been streamed into the
-  // object, returns an empty string.
-  const char* message() const {
-    return message_.get() != nullptr ? message_->c_str() : "";
-  }
-  // Deprecated; please use message() instead.
-  const char* failure_message() const { return message(); }
-
-  // Streams a custom failure message into this object.
-  template <typename T> AssertionResult& operator<<(const T& value) {
-    AppendMessage(Message() << value);
-    return *this;
-  }
-
-  // Allows streaming basic output manipulators such as endl or flush into
-  // this object.
-  AssertionResult& operator<<(
-      ::std::ostream& (*basic_manipulator)(::std::ostream& stream)) {
-    AppendMessage(Message() << basic_manipulator);
-    return *this;
-  }
-
- private:
-  // Appends the contents of message to message_.
-  void AppendMessage(const Message& a_message) {
-    if (message_.get() == nullptr) message_.reset(new ::std::string);
-    message_->append(a_message.GetString().c_str());
-  }
-
-  // Swap the contents of this AssertionResult with other.
-  void swap(AssertionResult& other);
-
-  // Stores result of the assertion predicate.
-  bool success_;
-  // Stores the message describing the condition in case the expectation
-  // construct is not satisfied with the predicate's outcome.
-  // Referenced via a pointer to avoid taking too much stack frame space
-  // with test assertions.
-  std::unique_ptr< ::std::string> message_;
-};
-
-// Makes a successful assertion result.
-GTEST_API_ AssertionResult AssertionSuccess();
-
-// Makes a failed assertion result.
-GTEST_API_ AssertionResult AssertionFailure();
-
-// Makes a failed assertion result with the given failure message.
-// Deprecated; use AssertionFailure() << msg.
-GTEST_API_ AssertionResult AssertionFailure(const Message& msg);
-
-}  // namespace testing
-
-// Includes the auto-generated header that implements a family of generic
-// predicate assertion macros. This include comes late because it relies on
-// APIs declared above.
-#include "gtest/gtest_pred_impl.h"
-
-namespace testing {
-
-// The abstract class that all tests inherit from.
-//
-// In Google Test, a unit test program contains one or many TestSuites, and
-// each TestSuite contains one or many Tests.
-//
-// When you define a test using the TEST macro, you don't need to
-// explicitly derive from Test - the TEST macro automatically does
-// this for you.
-//
-// The only time you derive from Test is when defining a test fixture
-// to be used in a TEST_F.  For example:
-//
-//   class FooTest : public testing::Test {
-//    protected:
-//     void SetUp() override { ... }
-//     void TearDown() override { ... }
-//     ...
-//   };
-//
-//   TEST_F(FooTest, Bar) { ... }
-//   TEST_F(FooTest, Baz) { ... }
-//
-// Test is not copyable.
-class GTEST_API_ Test {
- public:
-  friend class TestInfo;
-
-  // The d'tor is virtual as we intend to inherit from Test.
-  virtual ~Test();
-
-  // Sets up the stuff shared by all tests in this test case.
-  //
-  // Google Test will call Foo::SetUpTestSuite() before running the first
-  // test in test case Foo.  Hence a sub-class can define its own
-  // SetUpTestSuite() method to shadow the one defined in the super
-  // class.
-  // Failures that happen during SetUpTestSuite are logged but otherwise
-  // ignored.
-  static void SetUpTestSuite() {}
-
-  // Tears down the stuff shared by all tests in this test suite.
-  //
-  // Google Test will call Foo::TearDownTestSuite() after running the last
-  // test in test case Foo.  Hence a sub-class can define its own
-  // TearDownTestSuite() method to shadow the one defined in the super
-  // class.
-  // Failures that happen during TearDownTestSuite are logged but otherwise
-  // ignored.
-  static void TearDownTestSuite() {}
-
-  // Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  static void TearDownTestCase() {}
-  static void SetUpTestCase() {}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Returns true if and only if the current test has a fatal failure.
-  static bool HasFatalFailure();
-
-  // Returns true if and only if the current test has a non-fatal failure.
-  static bool HasNonfatalFailure();
-
-  // Returns true if and only if the current test was skipped.
-  static bool IsSkipped();
-
-  // Returns true if and only if the current test has a (either fatal or
-  // non-fatal) failure.
-  static bool HasFailure() { return HasFatalFailure() || HasNonfatalFailure(); }
-
-  // Logs a property for the current test, test suite, or for the entire
-  // invocation of the test program when used outside of the context of a
-  // test suite.  Only the last value for a given key is remembered.  These
-  // are public static so they can be called from utility functions that are
-  // not members of the test fixture.  Calls to RecordProperty made during
-  // lifespan of the test (from the moment its constructor starts to the
-  // moment its destructor finishes) will be output in XML as attributes of
-  // the <testcase> element.  Properties recorded from fixture's
-  // SetUpTestSuite or TearDownTestSuite are logged as attributes of the
-  // corresponding <testsuite> element.  Calls to RecordProperty made in the
-  // global context (before or after invocation of RUN_ALL_TESTS and from
-  // SetUp/TearDown method of Environment objects registered with Google
-  // Test) will be output as attributes of the <testsuites> element.
-  static void RecordProperty(const std::string& key, const std::string& value);
-  static void RecordProperty(const std::string& key, int value);
-
- protected:
-  // Creates a Test object.
-  Test();
-
-  // Sets up the test fixture.
-  virtual void SetUp();
-
-  // Tears down the test fixture.
-  virtual void TearDown();
-
- private:
-  // Returns true if and only if the current test has the same fixture class
-  // as the first test in the current test suite.
-  static bool HasSameFixtureClass();
-
-  // Runs the test after the test fixture has been set up.
-  //
-  // A sub-class must implement this to define the test logic.
-  //
-  // DO NOT OVERRIDE THIS FUNCTION DIRECTLY IN A USER PROGRAM.
-  // Instead, use the TEST or TEST_F macro.
-  virtual void TestBody() = 0;
-
-  // Sets up, executes, and tears down the test.
-  void Run();
-
-  // Deletes self.  We deliberately pick an unusual name for this
-  // internal method to avoid clashing with names used in user TESTs.
-  void DeleteSelf_() { delete this; }
-
-  const std::unique_ptr<GTEST_FLAG_SAVER_> gtest_flag_saver_;
-
-  // Often a user misspells SetUp() as Setup() and spends a long time
-  // wondering why it is never called by Google Test.  The declaration of
-  // the following method is solely for catching such an error at
-  // compile time:
-  //
-  //   - The return type is deliberately chosen to be not void, so it
-  //   will be a conflict if void Setup() is declared in the user's
-  //   test fixture.
-  //
-  //   - This method is private, so it will be another compiler error
-  //   if the method is called from the user's test fixture.
-  //
-  // DO NOT OVERRIDE THIS FUNCTION.
-  //
-  // If you see an error about overriding the following function or
-  // about it being private, you have mis-spelled SetUp() as Setup().
-  struct Setup_should_be_spelled_SetUp {};
-  virtual Setup_should_be_spelled_SetUp* Setup() { return nullptr; }
-
-  // We disallow copying Tests.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Test);
-};
-
-typedef internal::TimeInMillis TimeInMillis;
-
-// A copyable object representing a user specified test property which can be
-// output as a key/value string pair.
-//
-// Don't inherit from TestProperty as its destructor is not virtual.
-class TestProperty {
- public:
-  // C'tor.  TestProperty does NOT have a default constructor.
-  // Always use this constructor (with parameters) to create a
-  // TestProperty object.
-  TestProperty(const std::string& a_key, const std::string& a_value) :
-    key_(a_key), value_(a_value) {
-  }
-
-  // Gets the user supplied key.
-  const char* key() const {
-    return key_.c_str();
-  }
-
-  // Gets the user supplied value.
-  const char* value() const {
-    return value_.c_str();
-  }
-
-  // Sets a new value, overriding the one supplied in the constructor.
-  void SetValue(const std::string& new_value) {
-    value_ = new_value;
-  }
-
- private:
-  // The key supplied by the user.
-  std::string key_;
-  // The value supplied by the user.
-  std::string value_;
-};
-
-// The result of a single Test.  This includes a list of
-// TestPartResults, a list of TestProperties, a count of how many
-// death tests there are in the Test, and how much time it took to run
-// the Test.
-//
-// TestResult is not copyable.
-class GTEST_API_ TestResult {
- public:
-  // Creates an empty TestResult.
-  TestResult();
-
-  // D'tor.  Do not inherit from TestResult.
-  ~TestResult();
-
-  // Gets the number of all test parts.  This is the sum of the number
-  // of successful test parts and the number of failed test parts.
-  int total_part_count() const;
-
-  // Returns the number of the test properties.
-  int test_property_count() const;
-
-  // Returns true if and only if the test passed (i.e. no test part failed).
-  bool Passed() const { return !Skipped() && !Failed(); }
-
-  // Returns true if and only if the test was skipped.
-  bool Skipped() const;
-
-  // Returns true if and only if the test failed.
-  bool Failed() const;
-
-  // Returns true if and only if the test fatally failed.
-  bool HasFatalFailure() const;
-
-  // Returns true if and only if the test has a non-fatal failure.
-  bool HasNonfatalFailure() const;
-
-  // Returns the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const { return elapsed_time_; }
-
-  // Gets the time of the test case start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const { return start_timestamp_; }
-
-  // Returns the i-th test part result among all the results. i can range from 0
-  // to total_part_count() - 1. If i is not in that range, aborts the program.
-  const TestPartResult& GetTestPartResult(int i) const;
-
-  // Returns the i-th test property. i can range from 0 to
-  // test_property_count() - 1. If i is not in that range, aborts the
-  // program.
-  const TestProperty& GetTestProperty(int i) const;
-
- private:
-  friend class TestInfo;
-  friend class TestSuite;
-  friend class UnitTest;
-  friend class internal::DefaultGlobalTestPartResultReporter;
-  friend class internal::ExecDeathTest;
-  friend class internal::TestResultAccessor;
-  friend class internal::UnitTestImpl;
-  friend class internal::WindowsDeathTest;
-  friend class internal::FuchsiaDeathTest;
-
-  // Gets the vector of TestPartResults.
-  const std::vector<TestPartResult>& test_part_results() const {
-    return test_part_results_;
-  }
-
-  // Gets the vector of TestProperties.
-  const std::vector<TestProperty>& test_properties() const {
-    return test_properties_;
-  }
-
-  // Sets the start time.
-  void set_start_timestamp(TimeInMillis start) { start_timestamp_ = start; }
-
-  // Sets the elapsed time.
-  void set_elapsed_time(TimeInMillis elapsed) { elapsed_time_ = elapsed; }
-
-  // Adds a test property to the list. The property is validated and may add
-  // a non-fatal failure if invalid (e.g., if it conflicts with reserved
-  // key names). If a property is already recorded for the same key, the
-  // value will be updated, rather than storing multiple values for the same
-  // key.  xml_element specifies the element for which the property is being
-  // recorded and is used for validation.
-  void RecordProperty(const std::string& xml_element,
-                      const TestProperty& test_property);
-
-  // Adds a failure if the key is a reserved attribute of Google Test
-  // testsuite tags.  Returns true if the property is valid.
-  // FIXME: Validate attribute names are legal and human readable.
-  static bool ValidateTestProperty(const std::string& xml_element,
-                                   const TestProperty& test_property);
-
-  // Adds a test part result to the list.
-  void AddTestPartResult(const TestPartResult& test_part_result);
-
-  // Returns the death test count.
-  int death_test_count() const { return death_test_count_; }
-
-  // Increments the death test count, returning the new count.
-  int increment_death_test_count() { return ++death_test_count_; }
-
-  // Clears the test part results.
-  void ClearTestPartResults();
-
-  // Clears the object.
-  void Clear();
-
-  // Protects mutable state of the property vector and of owned
-  // properties, whose values may be updated.
-  internal::Mutex test_properites_mutex_;
-
-  // The vector of TestPartResults
-  std::vector<TestPartResult> test_part_results_;
-  // The vector of TestProperties
-  std::vector<TestProperty> test_properties_;
-  // Running count of death tests.
-  int death_test_count_;
-  // The start time, in milliseconds since UNIX Epoch.
-  TimeInMillis start_timestamp_;
-  // The elapsed time, in milliseconds.
-  TimeInMillis elapsed_time_;
-
-  // We disallow copying TestResult.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestResult);
-};  // class TestResult
-
-// A TestInfo object stores the following information about a test:
-//
-//   Test suite name
-//   Test name
-//   Whether the test should be run
-//   A function pointer that creates the test object when invoked
-//   Test result
-//
-// The constructor of TestInfo registers itself with the UnitTest
-// singleton such that the RUN_ALL_TESTS() macro knows which tests to
-// run.
-class GTEST_API_ TestInfo {
- public:
-  // Destructs a TestInfo object.  This function is not virtual, so
-  // don't inherit from TestInfo.
-  ~TestInfo();
-
-  // Returns the test suite name.
-  const char* test_suite_name() const { return test_suite_name_.c_str(); }
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const char* test_case_name() const { return test_suite_name(); }
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Returns the test name.
-  const char* name() const { return name_.c_str(); }
-
-  // Returns the name of the parameter type, or NULL if this is not a typed
-  // or a type-parameterized test.
-  const char* type_param() const {
-    if (type_param_.get() != nullptr) return type_param_->c_str();
-    return nullptr;
-  }
-
-  // Returns the text representation of the value parameter, or NULL if this
-  // is not a value-parameterized test.
-  const char* value_param() const {
-    if (value_param_.get() != nullptr) return value_param_->c_str();
-    return nullptr;
-  }
-
-  // Returns the file name where this test is defined.
-  const char* file() const { return location_.file.c_str(); }
-
-  // Returns the line where this test is defined.
-  int line() const { return location_.line; }
-
-  // Return true if this test should not be run because it's in another shard.
-  bool is_in_another_shard() const { return is_in_another_shard_; }
-
-  // Returns true if this test should run, that is if the test is not
-  // disabled (or it is disabled but the also_run_disabled_tests flag has
-  // been specified) and its full name matches the user-specified filter.
-  //
-  // Google Test allows the user to filter the tests by their full names.
-  // The full name of a test Bar in test suite Foo is defined as
-  // "Foo.Bar".  Only the tests that match the filter will run.
-  //
-  // A filter is a colon-separated list of glob (not regex) patterns,
-  // optionally followed by a '-' and a colon-separated list of
-  // negative patterns (tests to exclude).  A test is run if it
-  // matches one of the positive patterns and does not match any of
-  // the negative patterns.
-  //
-  // For example, *A*:Foo.* is a filter that matches any string that
-  // contains the character 'A' or starts with "Foo.".
-  bool should_run() const { return should_run_; }
-
-  // Returns true if and only if this test will appear in the XML report.
-  bool is_reportable() const {
-    // The XML report includes tests matching the filter, excluding those
-    // run in other shards.
-    return matches_filter_ && !is_in_another_shard_;
-  }
-
-  // Returns the result of the test.
-  const TestResult* result() const { return &result_; }
-
- private:
-#if GTEST_HAS_DEATH_TEST
-  friend class internal::DefaultDeathTestFactory;
-#endif  // GTEST_HAS_DEATH_TEST
-  friend class Test;
-  friend class TestSuite;
-  friend class internal::UnitTestImpl;
-  friend class internal::StreamingListenerTest;
-  friend TestInfo* internal::MakeAndRegisterTestInfo(
-      const char* test_suite_name, const char* name, const char* type_param,
-      const char* value_param, internal::CodeLocation code_location,
-      internal::TypeId fixture_class_id, internal::SetUpTestSuiteFunc set_up_tc,
-      internal::TearDownTestSuiteFunc tear_down_tc,
-      internal::TestFactoryBase* factory);
-
-  // Constructs a TestInfo object. The newly constructed instance assumes
-  // ownership of the factory object.
-  TestInfo(const std::string& test_suite_name, const std::string& name,
-           const char* a_type_param,   // NULL if not a type-parameterized test
-           const char* a_value_param,  // NULL if not a value-parameterized test
-           internal::CodeLocation a_code_location,
-           internal::TypeId fixture_class_id,
-           internal::TestFactoryBase* factory);
-
-  // Increments the number of death tests encountered in this test so
-  // far.
-  int increment_death_test_count() {
-    return result_.increment_death_test_count();
-  }
-
-  // Creates the test object, runs it, records its result, and then
-  // deletes it.
-  void Run();
-
-  static void ClearTestResult(TestInfo* test_info) {
-    test_info->result_.Clear();
-  }
-
-  // These fields are immutable properties of the test.
-  const std::string test_suite_name_;    // test suite name
-  const std::string name_;               // Test name
-  // Name of the parameter type, or NULL if this is not a typed or a
-  // type-parameterized test.
-  const std::unique_ptr<const ::std::string> type_param_;
-  // Text representation of the value parameter, or NULL if this is not a
-  // value-parameterized test.
-  const std::unique_ptr<const ::std::string> value_param_;
-  internal::CodeLocation location_;
-  const internal::TypeId fixture_class_id_;  // ID of the test fixture class
-  bool should_run_;           // True if and only if this test should run
-  bool is_disabled_;          // True if and only if this test is disabled
-  bool matches_filter_;       // True if this test matches the
-                              // user-specified filter.
-  bool is_in_another_shard_;  // Will be run in another shard.
-  internal::TestFactoryBase* const factory_;  // The factory that creates
-                                              // the test object
-
-  // This field is mutable and needs to be reset before running the
-  // test for the second time.
-  TestResult result_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestInfo);
-};
-
-// A test suite, which consists of a vector of TestInfos.
-//
-// TestSuite is not copyable.
-class GTEST_API_ TestSuite {
- public:
-  // Creates a TestSuite with the given name.
-  //
-  // TestSuite does NOT have a default constructor.  Always use this
-  // constructor to create a TestSuite object.
-  //
-  // Arguments:
-  //
-  //   name:         name of the test suite
-  //   a_type_param: the name of the test's type parameter, or NULL if
-  //                 this is not a type-parameterized test.
-  //   set_up_tc:    pointer to the function that sets up the test suite
-  //   tear_down_tc: pointer to the function that tears down the test suite
-  TestSuite(const char* name, const char* a_type_param,
-            internal::SetUpTestSuiteFunc set_up_tc,
-            internal::TearDownTestSuiteFunc tear_down_tc);
-
-  // Destructor of TestSuite.
-  virtual ~TestSuite();
-
-  // Gets the name of the TestSuite.
-  const char* name() const { return name_.c_str(); }
-
-  // Returns the name of the parameter type, or NULL if this is not a
-  // type-parameterized test suite.
-  const char* type_param() const {
-    if (type_param_.get() != nullptr) return type_param_->c_str();
-    return nullptr;
-  }
-
-  // Returns true if any test in this test suite should run.
-  bool should_run() const { return should_run_; }
-
-  // Gets the number of successful tests in this test suite.
-  int successful_test_count() const;
-
-  // Gets the number of skipped tests in this test suite.
-  int skipped_test_count() const;
-
-  // Gets the number of failed tests in this test suite.
-  int failed_test_count() const;
-
-  // Gets the number of disabled tests that will be reported in the XML report.
-  int reportable_disabled_test_count() const;
-
-  // Gets the number of disabled tests in this test suite.
-  int disabled_test_count() const;
-
-  // Gets the number of tests to be printed in the XML report.
-  int reportable_test_count() const;
-
-  // Get the number of tests in this test suite that should run.
-  int test_to_run_count() const;
-
-  // Gets the number of all tests in this test suite.
-  int total_test_count() const;
-
-  // Returns true if and only if the test suite passed.
-  bool Passed() const { return !Failed(); }
-
-  // Returns true if and only if the test suite failed.
-  bool Failed() const { return failed_test_count() > 0; }
-
-  // Returns the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const { return elapsed_time_; }
-
-  // Gets the time of the test suite start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const { return start_timestamp_; }
-
-  // Returns the i-th test among all the tests. i can range from 0 to
-  // total_test_count() - 1. If i is not in that range, returns NULL.
-  const TestInfo* GetTestInfo(int i) const;
-
-  // Returns the TestResult that holds test properties recorded during
-  // execution of SetUpTestSuite and TearDownTestSuite.
-  const TestResult& ad_hoc_test_result() const { return ad_hoc_test_result_; }
-
- private:
-  friend class Test;
-  friend class internal::UnitTestImpl;
-
-  // Gets the (mutable) vector of TestInfos in this TestSuite.
-  std::vector<TestInfo*>& test_info_list() { return test_info_list_; }
-
-  // Gets the (immutable) vector of TestInfos in this TestSuite.
-  const std::vector<TestInfo*>& test_info_list() const {
-    return test_info_list_;
-  }
-
-  // Returns the i-th test among all the tests. i can range from 0 to
-  // total_test_count() - 1. If i is not in that range, returns NULL.
-  TestInfo* GetMutableTestInfo(int i);
-
-  // Sets the should_run member.
-  void set_should_run(bool should) { should_run_ = should; }
-
-  // Adds a TestInfo to this test suite.  Will delete the TestInfo upon
-  // destruction of the TestSuite object.
-  void AddTestInfo(TestInfo * test_info);
-
-  // Clears the results of all tests in this test suite.
-  void ClearResult();
-
-  // Clears the results of all tests in the given test suite.
-  static void ClearTestSuiteResult(TestSuite* test_suite) {
-    test_suite->ClearResult();
-  }
-
-  // Runs every test in this TestSuite.
-  void Run();
-
-  // Runs SetUpTestSuite() for this TestSuite.  This wrapper is needed
-  // for catching exceptions thrown from SetUpTestSuite().
-  void RunSetUpTestSuite() {
-    if (set_up_tc_ != nullptr) {
-      (*set_up_tc_)();
-    }
-  }
-
-  // Runs TearDownTestSuite() for this TestSuite.  This wrapper is
-  // needed for catching exceptions thrown from TearDownTestSuite().
-  void RunTearDownTestSuite() {
-    if (tear_down_tc_ != nullptr) {
-      (*tear_down_tc_)();
-    }
-  }
-
-  // Returns true if and only if test passed.
-  static bool TestPassed(const TestInfo* test_info) {
-    return test_info->should_run() && test_info->result()->Passed();
-  }
-
-  // Returns true if and only if test skipped.
-  static bool TestSkipped(const TestInfo* test_info) {
-    return test_info->should_run() && test_info->result()->Skipped();
-  }
-
-  // Returns true if and only if test failed.
-  static bool TestFailed(const TestInfo* test_info) {
-    return test_info->should_run() && test_info->result()->Failed();
-  }
-
-  // Returns true if and only if the test is disabled and will be reported in
-  // the XML report.
-  static bool TestReportableDisabled(const TestInfo* test_info) {
-    return test_info->is_reportable() && test_info->is_disabled_;
-  }
-
-  // Returns true if and only if test is disabled.
-  static bool TestDisabled(const TestInfo* test_info) {
-    return test_info->is_disabled_;
-  }
-
-  // Returns true if and only if this test will appear in the XML report.
-  static bool TestReportable(const TestInfo* test_info) {
-    return test_info->is_reportable();
-  }
-
-  // Returns true if the given test should run.
-  static bool ShouldRunTest(const TestInfo* test_info) {
-    return test_info->should_run();
-  }
-
-  // Shuffles the tests in this test suite.
-  void ShuffleTests(internal::Random* random);
-
-  // Restores the test order to before the first shuffle.
-  void UnshuffleTests();
-
-  // Name of the test suite.
-  std::string name_;
-  // Name of the parameter type, or NULL if this is not a typed or a
-  // type-parameterized test.
-  const std::unique_ptr<const ::std::string> type_param_;
-  // The vector of TestInfos in their original order.  It owns the
-  // elements in the vector.
-  std::vector<TestInfo*> test_info_list_;
-  // Provides a level of indirection for the test list to allow easy
-  // shuffling and restoring the test order.  The i-th element in this
-  // vector is the index of the i-th test in the shuffled test list.
-  std::vector<int> test_indices_;
-  // Pointer to the function that sets up the test suite.
-  internal::SetUpTestSuiteFunc set_up_tc_;
-  // Pointer to the function that tears down the test suite.
-  internal::TearDownTestSuiteFunc tear_down_tc_;
-  // True if and only if any test in this test suite should run.
-  bool should_run_;
-  // The start time, in milliseconds since UNIX Epoch.
-  TimeInMillis start_timestamp_;
-  // Elapsed time, in milliseconds.
-  TimeInMillis elapsed_time_;
-  // Holds test properties recorded during execution of SetUpTestSuite and
-  // TearDownTestSuite.
-  TestResult ad_hoc_test_result_;
-
-  // We disallow copying TestSuites.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestSuite);
-};
-
-// An Environment object is capable of setting up and tearing down an
-// environment.  You should subclass this to define your own
-// environment(s).
-//
-// An Environment object does the set-up and tear-down in virtual
-// methods SetUp() and TearDown() instead of the constructor and the
-// destructor, as:
-//
-//   1. You cannot safely throw from a destructor.  This is a problem
-//      as in some cases Google Test is used where exceptions are enabled, and
-//      we may want to implement ASSERT_* using exceptions where they are
-//      available.
-//   2. You cannot use ASSERT_* directly in a constructor or
-//      destructor.
-class Environment {
- public:
-  // The d'tor is virtual as we need to subclass Environment.
-  virtual ~Environment() {}
-
-  // Override this to define how to set up the environment.
-  virtual void SetUp() {}
-
-  // Override this to define how to tear down the environment.
-  virtual void TearDown() {}
- private:
-  // If you see an error about overriding the following function or
-  // about it being private, you have mis-spelled SetUp() as Setup().
-  struct Setup_should_be_spelled_SetUp {};
-  virtual Setup_should_be_spelled_SetUp* Setup() { return nullptr; }
-};
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Exception which can be thrown from TestEventListener::OnTestPartResult.
-class GTEST_API_ AssertionException
-    : public internal::GoogleTestFailureException {
- public:
-  explicit AssertionException(const TestPartResult& result)
-      : GoogleTestFailureException(result) {}
-};
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// The interface for tracing execution of tests. The methods are organized in
-// the order the corresponding events are fired.
-class TestEventListener {
- public:
-  virtual ~TestEventListener() {}
-
-  // Fired before any test activity starts.
-  virtual void OnTestProgramStart(const UnitTest& unit_test) = 0;
-
-  // Fired before each iteration of tests starts.  There may be more than
-  // one iteration if GTEST_FLAG(repeat) is set. iteration is the iteration
-  // index, starting from 0.
-  virtual void OnTestIterationStart(const UnitTest& unit_test,
-                                    int iteration) = 0;
-
-  // Fired before environment set-up for each iteration of tests starts.
-  virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test) = 0;
-
-  // Fired after environment set-up for each iteration of tests ends.
-  virtual void OnEnvironmentsSetUpEnd(const UnitTest& unit_test) = 0;
-
-  // Fired before the test suite starts.
-  virtual void OnTestSuiteStart(const TestSuite& /*test_suite*/) {}
-
-  //  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  virtual void OnTestCaseStart(const TestCase& /*test_case*/) {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Fired before the test starts.
-  virtual void OnTestStart(const TestInfo& test_info) = 0;
-
-  // Fired after a failed assertion or a SUCCEED() invocation.
-  // If you want to throw an exception from this function to skip to the next
-  // TEST, it must be AssertionException defined above, or inherited from it.
-  virtual void OnTestPartResult(const TestPartResult& test_part_result) = 0;
-
-  // Fired after the test ends.
-  virtual void OnTestEnd(const TestInfo& test_info) = 0;
-
-  // Fired after the test suite ends.
-  virtual void OnTestSuiteEnd(const TestSuite& /*test_suite*/) {}
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  virtual void OnTestCaseEnd(const TestCase& /*test_case*/) {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Fired before environment tear-down for each iteration of tests starts.
-  virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test) = 0;
-
-  // Fired after environment tear-down for each iteration of tests ends.
-  virtual void OnEnvironmentsTearDownEnd(const UnitTest& unit_test) = 0;
-
-  // Fired after each iteration of tests finishes.
-  virtual void OnTestIterationEnd(const UnitTest& unit_test,
-                                  int iteration) = 0;
-
-  // Fired after all test activities have ended.
-  virtual void OnTestProgramEnd(const UnitTest& unit_test) = 0;
-};
-
-// The convenience class for users who need to override just one or two
-// methods and are not concerned that a possible change to a signature of
-// the methods they override will not be caught during the build.  For
-// comments about each method please see the definition of TestEventListener
-// above.
-class EmptyTestEventListener : public TestEventListener {
- public:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int /*iteration*/) override {}
-  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {}
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestSuiteStart(const TestSuite& /*test_suite*/) override {}
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestCase& /*test_case*/) override {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnTestStart(const TestInfo& /*test_info*/) override {}
-  void OnTestPartResult(const TestPartResult& /*test_part_result*/) override {}
-  void OnTestEnd(const TestInfo& /*test_info*/) override {}
-  void OnTestSuiteEnd(const TestSuite& /*test_suite*/) override {}
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& /*test_case*/) override {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {}
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                          int /*iteration*/) override {}
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
-};
-
-// TestEventListeners lets users add listeners to track events in Google Test.
-class GTEST_API_ TestEventListeners {
- public:
-  TestEventListeners();
-  ~TestEventListeners();
-
-  // Appends an event listener to the end of the list. Google Test assumes
-  // the ownership of the listener (i.e. it will delete the listener when
-  // the test program finishes).
-  void Append(TestEventListener* listener);
-
-  // Removes the given event listener from the list and returns it.  It then
-  // becomes the caller's responsibility to delete the listener. Returns
-  // NULL if the listener is not found in the list.
-  TestEventListener* Release(TestEventListener* listener);
-
-  // Returns the standard listener responsible for the default console
-  // output.  Can be removed from the listeners list to shut down default
-  // console output.  Note that removing this object from the listener list
-  // with Release transfers its ownership to the caller and makes this
-  // function return NULL the next time.
-  TestEventListener* default_result_printer() const {
-    return default_result_printer_;
-  }
-
-  // Returns the standard listener responsible for the default XML output
-  // controlled by the --gtest_output=xml flag.  Can be removed from the
-  // listeners list by users who want to shut down the default XML output
-  // controlled by this flag and substitute it with custom one.  Note that
-  // removing this object from the listener list with Release transfers its
-  // ownership to the caller and makes this function return NULL the next
-  // time.
-  TestEventListener* default_xml_generator() const {
-    return default_xml_generator_;
-  }
-
- private:
-  friend class TestSuite;
-  friend class TestInfo;
-  friend class internal::DefaultGlobalTestPartResultReporter;
-  friend class internal::NoExecDeathTest;
-  friend class internal::TestEventListenersAccessor;
-  friend class internal::UnitTestImpl;
-
-  // Returns repeater that broadcasts the TestEventListener events to all
-  // subscribers.
-  TestEventListener* repeater();
-
-  // Sets the default_result_printer attribute to the provided listener.
-  // The listener is also added to the listener list and previous
-  // default_result_printer is removed from it and deleted. The listener can
-  // also be NULL in which case it will not be added to the list. Does
-  // nothing if the previous and the current listener objects are the same.
-  void SetDefaultResultPrinter(TestEventListener* listener);
-
-  // Sets the default_xml_generator attribute to the provided listener.  The
-  // listener is also added to the listener list and previous
-  // default_xml_generator is removed from it and deleted. The listener can
-  // also be NULL in which case it will not be added to the list. Does
-  // nothing if the previous and the current listener objects are the same.
-  void SetDefaultXmlGenerator(TestEventListener* listener);
-
-  // Controls whether events will be forwarded by the repeater to the
-  // listeners in the list.
-  bool EventForwardingEnabled() const;
-  void SuppressEventForwarding();
-
-  // The actual list of listeners.
-  internal::TestEventRepeater* repeater_;
-  // Listener responsible for the standard result output.
-  TestEventListener* default_result_printer_;
-  // Listener responsible for the creation of the XML output file.
-  TestEventListener* default_xml_generator_;
-
-  // We disallow copying TestEventListeners.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventListeners);
-};
-
-// A UnitTest consists of a vector of TestSuites.
-//
-// This is a singleton class.  The only instance of UnitTest is
-// created when UnitTest::GetInstance() is first called.  This
-// instance is never deleted.
-//
-// UnitTest is not copyable.
-//
-// This class is thread-safe as long as the methods are called
-// according to their specification.
-class GTEST_API_ UnitTest {
- public:
-  // Gets the singleton UnitTest object.  The first time this method
-  // is called, a UnitTest object is constructed and returned.
-  // Consecutive calls will return the same object.
-  static UnitTest* GetInstance();
-
-  // Runs all tests in this UnitTest object and prints the result.
-  // Returns 0 if successful, or 1 otherwise.
-  //
-  // This method can only be called from the main thread.
-  //
-  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-  int Run() GTEST_MUST_USE_RESULT_;
-
-  // Returns the working directory when the first TEST() or TEST_F()
-  // was executed.  The UnitTest object owns the string.
-  const char* original_working_dir() const;
-
-  // Returns the TestSuite object for the test that's currently running,
-  // or NULL if no test is running.
-  const TestSuite* current_test_suite() const GTEST_LOCK_EXCLUDED_(mutex_);
-
-// Legacy API is still available but deprecated
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const TestCase* current_test_case() const GTEST_LOCK_EXCLUDED_(mutex_);
-#endif
-
-  // Returns the TestInfo object for the test that's currently running,
-  // or NULL if no test is running.
-  const TestInfo* current_test_info() const
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Returns the random seed used at the start of the current test run.
-  int random_seed() const;
-
-  // Returns the ParameterizedTestSuiteRegistry object used to keep track of
-  // value-parameterized tests and instantiate and register them.
-  //
-  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-  internal::ParameterizedTestSuiteRegistry& parameterized_test_registry()
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Gets the number of successful test suites.
-  int successful_test_suite_count() const;
-
-  // Gets the number of failed test suites.
-  int failed_test_suite_count() const;
-
-  // Gets the number of all test suites.
-  int total_test_suite_count() const;
-
-  // Gets the number of all test suites that contain at least one test
-  // that should run.
-  int test_suite_to_run_count() const;
-
-  //  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  int successful_test_case_count() const;
-  int failed_test_case_count() const;
-  int total_test_case_count() const;
-  int test_case_to_run_count() const;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Gets the number of successful tests.
-  int successful_test_count() const;
-
-  // Gets the number of skipped tests.
-  int skipped_test_count() const;
-
-  // Gets the number of failed tests.
-  int failed_test_count() const;
-
-  // Gets the number of disabled tests that will be reported in the XML report.
-  int reportable_disabled_test_count() const;
-
-  // Gets the number of disabled tests.
-  int disabled_test_count() const;
-
-  // Gets the number of tests to be printed in the XML report.
-  int reportable_test_count() const;
-
-  // Gets the number of all tests.
-  int total_test_count() const;
-
-  // Gets the number of tests that should run.
-  int test_to_run_count() const;
-
-  // Gets the time of the test program start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const;
-
-  // Gets the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const;
-
-  // Returns true if and only if the unit test passed (i.e. all test suites
-  // passed).
-  bool Passed() const;
-
-  // Returns true if and only if the unit test failed (i.e. some test suite
-  // failed or something outside of all tests failed).
-  bool Failed() const;
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  const TestSuite* GetTestSuite(int i) const;
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const TestCase* GetTestCase(int i) const;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Returns the TestResult containing information on test failures and
-  // properties logged outside of individual test suites.
-  const TestResult& ad_hoc_test_result() const;
-
-  // Returns the list of event listeners that can be used to track events
-  // inside Google Test.
-  TestEventListeners& listeners();
-
- private:
-  // Registers and returns a global test environment.  When a test
-  // program is run, all global test environments will be set-up in
-  // the order they were registered.  After all tests in the program
-  // have finished, all global test environments will be torn-down in
-  // the *reverse* order they were registered.
-  //
-  // The UnitTest object takes ownership of the given environment.
-  //
-  // This method can only be called from the main thread.
-  Environment* AddEnvironment(Environment* env);
-
-  // Adds a TestPartResult to the current TestResult object.  All
-  // Google Test assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc)
-  // eventually call this to report their results.  The user code
-  // should use the assertion macros instead of calling this directly.
-  void AddTestPartResult(TestPartResult::Type result_type,
-                         const char* file_name,
-                         int line_number,
-                         const std::string& message,
-                         const std::string& os_stack_trace)
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Adds a TestProperty to the current TestResult object when invoked from
-  // inside a test, to current TestSuite's ad_hoc_test_result_ when invoked
-  // from SetUpTestSuite or TearDownTestSuite, or to the global property set
-  // when invoked elsewhere.  If the result already contains a property with
-  // the same key, the value will be updated.
-  void RecordProperty(const std::string& key, const std::string& value);
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  TestSuite* GetMutableTestSuite(int i);
-
-  // Accessors for the implementation object.
-  internal::UnitTestImpl* impl() { return impl_; }
-  const internal::UnitTestImpl* impl() const { return impl_; }
-
-  // These classes and functions are friends as they need to access private
-  // members of UnitTest.
-  friend class ScopedTrace;
-  friend class Test;
-  friend class internal::AssertHelper;
-  friend class internal::StreamingListenerTest;
-  friend class internal::UnitTestRecordPropertyTestHelper;
-  friend Environment* AddGlobalTestEnvironment(Environment* env);
-  friend internal::UnitTestImpl* internal::GetUnitTestImpl();
-  friend void internal::ReportFailureInUnknownLocation(
-      TestPartResult::Type result_type,
-      const std::string& message);
-
-  // Creates an empty UnitTest.
-  UnitTest();
-
-  // D'tor
-  virtual ~UnitTest();
-
-  // Pushes a trace defined by SCOPED_TRACE() on to the per-thread
-  // Google Test trace stack.
-  void PushGTestTrace(const internal::TraceInfo& trace)
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Pops a trace from the per-thread Google Test trace stack.
-  void PopGTestTrace()
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Protects mutable state in *impl_.  This is mutable as some const
-  // methods need to lock it too.
-  mutable internal::Mutex mutex_;
-
-  // Opaque implementation object.  This field is never changed once
-  // the object is constructed.  We don't mark it as const here, as
-  // doing so will cause a warning in the constructor of UnitTest.
-  // Mutable state in *impl_ is protected by mutex_.
-  internal::UnitTestImpl* impl_;
-
-  // We disallow copying UnitTest.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(UnitTest);
-};
-
-// A convenient wrapper for adding an environment for the test
-// program.
-//
-// You should call this before RUN_ALL_TESTS() is called, probably in
-// main().  If you use gtest_main, you need to call this before main()
-// starts for it to take effect.  For example, you can define a global
-// variable like this:
-//
-//   testing::Environment* const foo_env =
-//       testing::AddGlobalTestEnvironment(new FooEnvironment);
-//
-// However, we strongly recommend you to write your own main() and
-// call AddGlobalTestEnvironment() there, as relying on initialization
-// of global variables makes the code harder to read and may cause
-// problems when you register multiple environments from different
-// translation units and the environments have dependencies among them
-// (remember that the compiler doesn't guarantee the order in which
-// global variables from different translation units are initialized).
-inline Environment* AddGlobalTestEnvironment(Environment* env) {
-  return UnitTest::GetInstance()->AddEnvironment(env);
-}
-
-// Initializes Google Test.  This must be called before calling
-// RUN_ALL_TESTS().  In particular, it parses a command line for the
-// flags that Google Test recognizes.  Whenever a Google Test flag is
-// seen, it is removed from argv, and *argc is decremented.
-//
-// No value is returned.  Instead, the Google Test flag variables are
-// updated.
-//
-// Calling the function for the second time has no user-visible effect.
-GTEST_API_ void InitGoogleTest(int* argc, char** argv);
-
-// This overloaded version can be used in Windows programs compiled in
-// UNICODE mode.
-GTEST_API_ void InitGoogleTest(int* argc, wchar_t** argv);
-
-// This overloaded version can be used on Arduino/embedded platforms where
-// there is no argc/argv.
-GTEST_API_ void InitGoogleTest();
-
-namespace internal {
-
-// Separate the error generating code from the code path to reduce the stack
-// frame size of CmpHelperEQ. This helps reduce the overhead of some sanitizers
-// when calling EXPECT_* in a tight loop.
-template <typename T1, typename T2>
-AssertionResult CmpHelperEQFailure(const char* lhs_expression,
-                                   const char* rhs_expression,
-                                   const T1& lhs, const T2& rhs) {
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   FormatForComparisonFailureMessage(lhs, rhs),
-                   FormatForComparisonFailureMessage(rhs, lhs),
-                   false);
-}
-
-// This block of code defines operator==/!=
-// to block lexical scope lookup.
-// It prevents using invalid operator==/!= defined at namespace scope.
-struct faketype {};
-inline bool operator==(faketype, faketype) { return true; }
-inline bool operator!=(faketype, faketype) { return false; }
-
-// The helper function for {ASSERT|EXPECT}_EQ.
-template <typename T1, typename T2>
-AssertionResult CmpHelperEQ(const char* lhs_expression,
-                            const char* rhs_expression,
-                            const T1& lhs,
-                            const T2& rhs) {
-  if (lhs == rhs) {
-    return AssertionSuccess();
-  }
-
-  return CmpHelperEQFailure(lhs_expression, rhs_expression, lhs, rhs);
-}
-
-// With this overloaded version, we allow anonymous enums to be used
-// in {ASSERT|EXPECT}_EQ when compiled with gcc 4, as anonymous enums
-// can be implicitly cast to BiggestInt.
-GTEST_API_ AssertionResult CmpHelperEQ(const char* lhs_expression,
-                                       const char* rhs_expression,
-                                       BiggestInt lhs,
-                                       BiggestInt rhs);
-
-class EqHelper {
- public:
-  // This templatized version is for the general case.
-  template <
-      typename T1, typename T2,
-      // Disable this overload for cases where one argument is a pointer
-      // and the other is the null pointer constant.
-      typename std::enable_if<!std::is_integral<T1>::value ||
-                              !std::is_pointer<T2>::value>::type* = nullptr>
-  static AssertionResult Compare(const char* lhs_expression,
-                                 const char* rhs_expression, const T1& lhs,
-                                 const T2& rhs) {
-    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
-  }
-
-  // With this overloaded version, we allow anonymous enums to be used
-  // in {ASSERT|EXPECT}_EQ when compiled with gcc 4, as anonymous
-  // enums can be implicitly cast to BiggestInt.
-  //
-  // Even though its body looks the same as the above version, we
-  // cannot merge the two, as it will make anonymous enums unhappy.
-  static AssertionResult Compare(const char* lhs_expression,
-                                 const char* rhs_expression,
-                                 BiggestInt lhs,
-                                 BiggestInt rhs) {
-    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
-  }
-
-  template <typename T>
-  static AssertionResult Compare(
-      const char* lhs_expression, const char* rhs_expression,
-      // Handle cases where '0' is used as a null pointer literal.
-      std::nullptr_t /* lhs */, T* rhs) {
-    // We already know that 'lhs' is a null pointer.
-    return CmpHelperEQ(lhs_expression, rhs_expression, static_cast<T*>(nullptr),
-                       rhs);
-  }
-};
-
-// Separate the error generating code from the code path to reduce the stack
-// frame size of CmpHelperOP. This helps reduce the overhead of some sanitizers
-// when calling EXPECT_OP in a tight loop.
-template <typename T1, typename T2>
-AssertionResult CmpHelperOpFailure(const char* expr1, const char* expr2,
-                                   const T1& val1, const T2& val2,
-                                   const char* op) {
-  return AssertionFailure()
-         << "Expected: (" << expr1 << ") " << op << " (" << expr2
-         << "), actual: " << FormatForComparisonFailureMessage(val1, val2)
-         << " vs " << FormatForComparisonFailureMessage(val2, val1);
-}
-
-// A macro for implementing the helper functions needed to implement
-// ASSERT_?? and EXPECT_??.  It is here just to avoid copy-and-paste
-// of similar code.
-//
-// For each templatized helper function, we also define an overloaded
-// version for BiggestInt in order to reduce code bloat and allow
-// anonymous enums to be used with {ASSERT|EXPECT}_?? when compiled
-// with gcc 4.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-
-#define GTEST_IMPL_CMP_HELPER_(op_name, op)\
-template <typename T1, typename T2>\
-AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
-                                   const T1& val1, const T2& val2) {\
-  if (val1 op val2) {\
-    return AssertionSuccess();\
-  } else {\
-    return CmpHelperOpFailure(expr1, expr2, val1, val2, #op);\
-  }\
-}\
-GTEST_API_ AssertionResult CmpHelper##op_name(\
-    const char* expr1, const char* expr2, BiggestInt val1, BiggestInt val2)
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-
-// Implements the helper function for {ASSERT|EXPECT}_NE
-GTEST_IMPL_CMP_HELPER_(NE, !=);
-// Implements the helper function for {ASSERT|EXPECT}_LE
-GTEST_IMPL_CMP_HELPER_(LE, <=);
-// Implements the helper function for {ASSERT|EXPECT}_LT
-GTEST_IMPL_CMP_HELPER_(LT, <);
-// Implements the helper function for {ASSERT|EXPECT}_GE
-GTEST_IMPL_CMP_HELPER_(GE, >=);
-// Implements the helper function for {ASSERT|EXPECT}_GT
-GTEST_IMPL_CMP_HELPER_(GT, >);
-
-#undef GTEST_IMPL_CMP_HELPER_
-
-// The helper function for {ASSERT|EXPECT}_STREQ.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const char* s1,
-                                          const char* s2);
-
-// The helper function for {ASSERT|EXPECT}_STRCASEEQ.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRCASEEQ(const char* s1_expression,
-                                              const char* s2_expression,
-                                              const char* s1,
-                                              const char* s2);
-
-// The helper function for {ASSERT|EXPECT}_STRNE.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const char* s1,
-                                          const char* s2);
-
-// The helper function for {ASSERT|EXPECT}_STRCASENE.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
-                                              const char* s2_expression,
-                                              const char* s1,
-                                              const char* s2);
-
-
-// Helper function for *_STREQ on wide strings.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const wchar_t* s1,
-                                          const wchar_t* s2);
-
-// Helper function for *_STRNE on wide strings.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const wchar_t* s1,
-                                          const wchar_t* s2);
-
-}  // namespace internal
-
-// IsSubstring() and IsNotSubstring() are intended to be used as the
-// first argument to {EXPECT,ASSERT}_PRED_FORMAT2(), not by
-// themselves.  They check whether needle is a substring of haystack
-// (NULL is considered a substring of itself only), and return an
-// appropriate error message when they fail.
-//
-// The {needle,haystack}_expr arguments are the stringified
-// expressions that generated the two real arguments.
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack);
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack);
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack);
-
-#if GTEST_HAS_STD_WSTRING
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack);
-#endif  // GTEST_HAS_STD_WSTRING
-
-namespace internal {
-
-// Helper template function for comparing floating-points.
-//
-// Template parameter:
-//
-//   RawType: the raw floating-point type (either float or double)
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-template <typename RawType>
-AssertionResult CmpHelperFloatingPointEQ(const char* lhs_expression,
-                                         const char* rhs_expression,
-                                         RawType lhs_value,
-                                         RawType rhs_value) {
-  const FloatingPoint<RawType> lhs(lhs_value), rhs(rhs_value);
-
-  if (lhs.AlmostEquals(rhs)) {
-    return AssertionSuccess();
-  }
-
-  ::std::stringstream lhs_ss;
-  lhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-         << lhs_value;
-
-  ::std::stringstream rhs_ss;
-  rhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-         << rhs_value;
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   StringStreamToString(&lhs_ss),
-                   StringStreamToString(&rhs_ss),
-                   false);
-}
-
-// Helper function for implementing ASSERT_NEAR.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult DoubleNearPredFormat(const char* expr1,
-                                                const char* expr2,
-                                                const char* abs_error_expr,
-                                                double val1,
-                                                double val2,
-                                                double abs_error);
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-// A class that enables one to stream messages to assertion macros
-class GTEST_API_ AssertHelper {
- public:
-  // Constructor.
-  AssertHelper(TestPartResult::Type type,
-               const char* file,
-               int line,
-               const char* message);
-  ~AssertHelper();
-
-  // Message assignment is a semantic trick to enable assertion
-  // streaming; see the GTEST_MESSAGE_ macro below.
-  void operator=(const Message& message) const;
-
- private:
-  // We put our data in a struct so that the size of the AssertHelper class can
-  // be as small as possible.  This is important because gcc is incapable of
-  // re-using stack space even for temporary variables, so every EXPECT_EQ
-  // reserves stack space for another AssertHelper.
-  struct AssertHelperData {
-    AssertHelperData(TestPartResult::Type t,
-                     const char* srcfile,
-                     int line_num,
-                     const char* msg)
-        : type(t), file(srcfile), line(line_num), message(msg) { }
-
-    TestPartResult::Type const type;
-    const char* const file;
-    int const line;
-    std::string const message;
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelperData);
-  };
-
-  AssertHelperData* const data_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelper);
-};
-
-enum GTestColor { COLOR_DEFAULT, COLOR_RED, COLOR_GREEN, COLOR_YELLOW };
-
-GTEST_API_ GTEST_ATTRIBUTE_PRINTF_(2, 3) void ColoredPrintf(GTestColor color,
-                                                            const char* fmt,
-                                                            ...);
-
-}  // namespace internal
-
-// The pure interface class that all value-parameterized tests inherit from.
-// A value-parameterized class must inherit from both ::testing::Test and
-// ::testing::WithParamInterface. In most cases that just means inheriting
-// from ::testing::TestWithParam, but more complicated test hierarchies
-// may need to inherit from Test and WithParamInterface at different levels.
-//
-// This interface has support for accessing the test parameter value via
-// the GetParam() method.
-//
-// Use it with one of the parameter generator defining functions, like Range(),
-// Values(), ValuesIn(), Bool(), and Combine().
-//
-// class FooTest : public ::testing::TestWithParam<int> {
-//  protected:
-//   FooTest() {
-//     // Can use GetParam() here.
-//   }
-//   ~FooTest() override {
-//     // Can use GetParam() here.
-//   }
-//   void SetUp() override {
-//     // Can use GetParam() here.
-//   }
-//   void TearDown override {
-//     // Can use GetParam() here.
-//   }
-// };
-// TEST_P(FooTest, DoesBar) {
-//   // Can use GetParam() method here.
-//   Foo foo;
-//   ASSERT_TRUE(foo.DoesBar(GetParam()));
-// }
-// INSTANTIATE_TEST_SUITE_P(OneToTenRange, FooTest, ::testing::Range(1, 10));
-
-template <typename T>
-class WithParamInterface {
- public:
-  typedef T ParamType;
-  virtual ~WithParamInterface() {}
-
-  // The current parameter value. Is also available in the test fixture's
-  // constructor.
-  static const ParamType& GetParam() {
-    GTEST_CHECK_(parameter_ != nullptr)
-        << "GetParam() can only be called inside a value-parameterized test "
-        << "-- did you intend to write TEST_P instead of TEST_F?";
-    return *parameter_;
-  }
-
- private:
-  // Sets parameter value. The caller is responsible for making sure the value
-  // remains alive and unchanged throughout the current test.
-  static void SetParam(const ParamType* parameter) {
-    parameter_ = parameter;
-  }
-
-  // Static value used for accessing parameter during a test lifetime.
-  static const ParamType* parameter_;
-
-  // TestClass must be a subclass of WithParamInterface<T> and Test.
-  template <class TestClass> friend class internal::ParameterizedTestFactory;
-};
-
-template <typename T>
-const T* WithParamInterface<T>::parameter_ = nullptr;
-
-// Most value-parameterized classes can ignore the existence of
-// WithParamInterface, and can just inherit from ::testing::TestWithParam.
-
-template <typename T>
-class TestWithParam : public Test, public WithParamInterface<T> {
-};
-
-// Macros for indicating success/failure in test code.
-
-// Skips test in runtime.
-// Skipping test aborts current function.
-// Skipped tests are neither successful nor failed.
-#define GTEST_SKIP() GTEST_SKIP_("Skipped")
-
-// ADD_FAILURE unconditionally adds a failure to the current test.
-// SUCCEED generates a success - it doesn't automatically make the
-// current test successful, as a test is only successful when it has
-// no failure.
-//
-// EXPECT_* verifies that a certain condition is satisfied.  If not,
-// it behaves like ADD_FAILURE.  In particular:
-//
-//   EXPECT_TRUE  verifies that a Boolean condition is true.
-//   EXPECT_FALSE verifies that a Boolean condition is false.
-//
-// FAIL and ASSERT_* are similar to ADD_FAILURE and EXPECT_*, except
-// that they will also abort the current function on failure.  People
-// usually want the fail-fast behavior of FAIL and ASSERT_*, but those
-// writing data-driven tests often find themselves using ADD_FAILURE
-// and EXPECT_* more.
-
-// Generates a nonfatal failure with a generic message.
-#define ADD_FAILURE() GTEST_NONFATAL_FAILURE_("Failed")
-
-// Generates a nonfatal failure at the given source file location with
-// a generic message.
-#define ADD_FAILURE_AT(file, line) \
-  GTEST_MESSAGE_AT_(file, line, "Failed", \
-                    ::testing::TestPartResult::kNonFatalFailure)
-
-// Generates a fatal failure with a generic message.
-#define GTEST_FAIL() GTEST_FATAL_FAILURE_("Failed")
-
-// Like GTEST_FAIL(), but at the given source file location.
-#define GTEST_FAIL_AT(file, line)         \
-  GTEST_MESSAGE_AT_(file, line, "Failed", \
-                    ::testing::TestPartResult::kFatalFailure)
-
-// Define this macro to 1 to omit the definition of FAIL(), which is a
-// generic name and clashes with some other libraries.
-#if !GTEST_DONT_DEFINE_FAIL
-# define FAIL() GTEST_FAIL()
-#endif
-
-// Generates a success with a generic message.
-#define GTEST_SUCCEED() GTEST_SUCCESS_("Succeeded")
-
-// Define this macro to 1 to omit the definition of SUCCEED(), which
-// is a generic name and clashes with some other libraries.
-#if !GTEST_DONT_DEFINE_SUCCEED
-# define SUCCEED() GTEST_SUCCEED()
-#endif
-
-// Macros for testing exceptions.
-//
-//    * {ASSERT|EXPECT}_THROW(statement, expected_exception):
-//         Tests that the statement throws the expected exception.
-//    * {ASSERT|EXPECT}_NO_THROW(statement):
-//         Tests that the statement doesn't throw any exception.
-//    * {ASSERT|EXPECT}_ANY_THROW(statement):
-//         Tests that the statement throws an exception.
-
-#define EXPECT_THROW(statement, expected_exception) \
-  GTEST_TEST_THROW_(statement, expected_exception, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_NO_THROW(statement) \
-  GTEST_TEST_NO_THROW_(statement, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_ANY_THROW(statement) \
-  GTEST_TEST_ANY_THROW_(statement, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_THROW(statement, expected_exception) \
-  GTEST_TEST_THROW_(statement, expected_exception, GTEST_FATAL_FAILURE_)
-#define ASSERT_NO_THROW(statement) \
-  GTEST_TEST_NO_THROW_(statement, GTEST_FATAL_FAILURE_)
-#define ASSERT_ANY_THROW(statement) \
-  GTEST_TEST_ANY_THROW_(statement, GTEST_FATAL_FAILURE_)
-
-// Boolean assertions. Condition can be either a Boolean expression or an
-// AssertionResult. For more information on how to use AssertionResult with
-// these macros see comments on that class.
-#define EXPECT_TRUE(condition) \
-  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
-                      GTEST_NONFATAL_FAILURE_)
-#define EXPECT_FALSE(condition) \
-  GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
-                      GTEST_NONFATAL_FAILURE_)
-#define ASSERT_TRUE(condition) \
-  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
-                      GTEST_FATAL_FAILURE_)
-#define ASSERT_FALSE(condition) \
-  GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
-                      GTEST_FATAL_FAILURE_)
-
-// Macros for testing equalities and inequalities.
-//
-//    * {ASSERT|EXPECT}_EQ(v1, v2): Tests that v1 == v2
-//    * {ASSERT|EXPECT}_NE(v1, v2): Tests that v1 != v2
-//    * {ASSERT|EXPECT}_LT(v1, v2): Tests that v1 < v2
-//    * {ASSERT|EXPECT}_LE(v1, v2): Tests that v1 <= v2
-//    * {ASSERT|EXPECT}_GT(v1, v2): Tests that v1 > v2
-//    * {ASSERT|EXPECT}_GE(v1, v2): Tests that v1 >= v2
-//
-// When they are not, Google Test prints both the tested expressions and
-// their actual values.  The values must be compatible built-in types,
-// or you will get a compiler error.  By "compatible" we mean that the
-// values can be compared by the respective operator.
-//
-// Note:
-//
-//   1. It is possible to make a user-defined type work with
-//   {ASSERT|EXPECT}_??(), but that requires overloading the
-//   comparison operators and is thus discouraged by the Google C++
-//   Usage Guide.  Therefore, you are advised to use the
-//   {ASSERT|EXPECT}_TRUE() macro to assert that two objects are
-//   equal.
-//
-//   2. The {ASSERT|EXPECT}_??() macros do pointer comparisons on
-//   pointers (in particular, C strings).  Therefore, if you use it
-//   with two C strings, you are testing how their locations in memory
-//   are related, not how their content is related.  To compare two C
-//   strings by content, use {ASSERT|EXPECT}_STR*().
-//
-//   3. {ASSERT|EXPECT}_EQ(v1, v2) is preferred to
-//   {ASSERT|EXPECT}_TRUE(v1 == v2), as the former tells you
-//   what the actual value is when it fails, and similarly for the
-//   other comparisons.
-//
-//   4. Do not depend on the order in which {ASSERT|EXPECT}_??()
-//   evaluate their arguments, which is undefined.
-//
-//   5. These macros evaluate their arguments exactly once.
-//
-// Examples:
-//
-//   EXPECT_NE(Foo(), 5);
-//   EXPECT_EQ(a_pointer, NULL);
-//   ASSERT_LT(i, array_size);
-//   ASSERT_GT(records.size(), 0) << "There is no record left.";
-
-#define EXPECT_EQ(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::EqHelper::Compare, val1, val2)
-#define EXPECT_NE(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
-#define EXPECT_LE(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
-#define EXPECT_LT(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
-#define EXPECT_GE(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
-#define EXPECT_GT(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
-
-#define GTEST_ASSERT_EQ(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::EqHelper::Compare, val1, val2)
-#define GTEST_ASSERT_NE(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
-#define GTEST_ASSERT_LE(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
-#define GTEST_ASSERT_LT(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
-#define GTEST_ASSERT_GE(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
-#define GTEST_ASSERT_GT(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
-
-// Define macro GTEST_DONT_DEFINE_ASSERT_XY to 1 to omit the definition of
-// ASSERT_XY(), which clashes with some users' own code.
-
-#if !GTEST_DONT_DEFINE_ASSERT_EQ
-# define ASSERT_EQ(val1, val2) GTEST_ASSERT_EQ(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_NE
-# define ASSERT_NE(val1, val2) GTEST_ASSERT_NE(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_LE
-# define ASSERT_LE(val1, val2) GTEST_ASSERT_LE(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_LT
-# define ASSERT_LT(val1, val2) GTEST_ASSERT_LT(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_GE
-# define ASSERT_GE(val1, val2) GTEST_ASSERT_GE(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_GT
-# define ASSERT_GT(val1, val2) GTEST_ASSERT_GT(val1, val2)
-#endif
-
-// C-string Comparisons.  All tests treat NULL and any non-NULL string
-// as different.  Two NULLs are equal.
-//
-//    * {ASSERT|EXPECT}_STREQ(s1, s2):     Tests that s1 == s2
-//    * {ASSERT|EXPECT}_STRNE(s1, s2):     Tests that s1 != s2
-//    * {ASSERT|EXPECT}_STRCASEEQ(s1, s2): Tests that s1 == s2, ignoring case
-//    * {ASSERT|EXPECT}_STRCASENE(s1, s2): Tests that s1 != s2, ignoring case
-//
-// For wide or narrow string objects, you can use the
-// {ASSERT|EXPECT}_??() macros.
-//
-// Don't depend on the order in which the arguments are evaluated,
-// which is undefined.
-//
-// These macros evaluate their arguments exactly once.
-
-#define EXPECT_STREQ(s1, s2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
-#define EXPECT_STRNE(s1, s2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
-#define EXPECT_STRCASEEQ(s1, s2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
-#define EXPECT_STRCASENE(s1, s2)\
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
-
-#define ASSERT_STREQ(s1, s2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
-#define ASSERT_STRNE(s1, s2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
-#define ASSERT_STRCASEEQ(s1, s2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
-#define ASSERT_STRCASENE(s1, s2)\
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
-
-// Macros for comparing floating-point numbers.
-//
-//    * {ASSERT|EXPECT}_FLOAT_EQ(val1, val2):
-//         Tests that two float values are almost equal.
-//    * {ASSERT|EXPECT}_DOUBLE_EQ(val1, val2):
-//         Tests that two double values are almost equal.
-//    * {ASSERT|EXPECT}_NEAR(v1, v2, abs_error):
-//         Tests that v1 and v2 are within the given distance to each other.
-//
-// Google Test uses ULP-based comparison to automatically pick a default
-// error bound that is appropriate for the operands.  See the
-// FloatingPoint template class in gtest-internal.h if you are
-// interested in the implementation details.
-
-#define EXPECT_FLOAT_EQ(val1, val2)\
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
-                      val1, val2)
-
-#define EXPECT_DOUBLE_EQ(val1, val2)\
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
-                      val1, val2)
-
-#define ASSERT_FLOAT_EQ(val1, val2)\
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
-                      val1, val2)
-
-#define ASSERT_DOUBLE_EQ(val1, val2)\
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
-                      val1, val2)
-
-#define EXPECT_NEAR(val1, val2, abs_error)\
-  EXPECT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
-                      val1, val2, abs_error)
-
-#define ASSERT_NEAR(val1, val2, abs_error)\
-  ASSERT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
-                      val1, val2, abs_error)
-
-// These predicate format functions work on floating-point values, and
-// can be used in {ASSERT|EXPECT}_PRED_FORMAT2*(), e.g.
-//
-//   EXPECT_PRED_FORMAT2(testing::DoubleLE, Foo(), 5.0);
-
-// Asserts that val1 is less than, or almost equal to, val2.  Fails
-// otherwise.  In particular, it fails if either val1 or val2 is NaN.
-GTEST_API_ AssertionResult FloatLE(const char* expr1, const char* expr2,
-                                   float val1, float val2);
-GTEST_API_ AssertionResult DoubleLE(const char* expr1, const char* expr2,
-                                    double val1, double val2);
-
-
-#if GTEST_OS_WINDOWS
-
-// Macros that test for HRESULT failure and success, these are only useful
-// on Windows, and rely on Windows SDK macros and APIs to compile.
-//
-//    * {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}(expr)
-//
-// When expr unexpectedly fails or succeeds, Google Test prints the
-// expected result and the actual result with both a human-readable
-// string representation of the error, if available, as well as the
-// hex result code.
-# define EXPECT_HRESULT_SUCCEEDED(expr) \
-    EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
-
-# define ASSERT_HRESULT_SUCCEEDED(expr) \
-    ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
-
-# define EXPECT_HRESULT_FAILED(expr) \
-    EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
-
-# define ASSERT_HRESULT_FAILED(expr) \
-    ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
-
-#endif  // GTEST_OS_WINDOWS
-
-// Macros that execute statement and check that it doesn't generate new fatal
-// failures in the current thread.
-//
-//   * {ASSERT|EXPECT}_NO_FATAL_FAILURE(statement);
-//
-// Examples:
-//
-//   EXPECT_NO_FATAL_FAILURE(Process());
-//   ASSERT_NO_FATAL_FAILURE(Process()) << "Process() failed";
-//
-#define ASSERT_NO_FATAL_FAILURE(statement) \
-    GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_FATAL_FAILURE_)
-#define EXPECT_NO_FATAL_FAILURE(statement) \
-    GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_NONFATAL_FAILURE_)
-
-// Causes a trace (including the given source file path and line number,
-// and the given message) to be included in every test failure message generated
-// by code in the scope of the lifetime of an instance of this class. The effect
-// is undone with the destruction of the instance.
-//
-// The message argument can be anything streamable to std::ostream.
-//
-// Example:
-//   testing::ScopedTrace trace("file.cc", 123, "message");
-//
-class GTEST_API_ ScopedTrace {
- public:
-  // The c'tor pushes the given source file location and message onto
-  // a trace stack maintained by Google Test.
-
-  // Template version. Uses Message() to convert the values into strings.
-  // Slow, but flexible.
-  template <typename T>
-  ScopedTrace(const char* file, int line, const T& message) {
-    PushTrace(file, line, (Message() << message).GetString());
-  }
-
-  // Optimize for some known types.
-  ScopedTrace(const char* file, int line, const char* message) {
-    PushTrace(file, line, message ? message : "(null)");
-  }
-
-  ScopedTrace(const char* file, int line, const std::string& message) {
-    PushTrace(file, line, message);
-  }
-
-  // The d'tor pops the info pushed by the c'tor.
-  //
-  // Note that the d'tor is not virtual in order to be efficient.
-  // Don't inherit from ScopedTrace!
-  ~ScopedTrace();
-
- private:
-  void PushTrace(const char* file, int line, std::string message);
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedTrace);
-} GTEST_ATTRIBUTE_UNUSED_;  // A ScopedTrace object does its job in its
-                            // c'tor and d'tor.  Therefore it doesn't
-                            // need to be used otherwise.
-
-// Causes a trace (including the source file path, the current line
-// number, and the given message) to be included in every test failure
-// message generated by code in the current scope.  The effect is
-// undone when the control leaves the current scope.
-//
-// The message argument can be anything streamable to std::ostream.
-//
-// In the implementation, we include the current line number as part
-// of the dummy variable name, thus allowing multiple SCOPED_TRACE()s
-// to appear in the same block - as long as they are on different
-// lines.
-//
-// Assuming that each thread maintains its own stack of traces.
-// Therefore, a SCOPED_TRACE() would (correctly) only affect the
-// assertions in its own thread.
-#define SCOPED_TRACE(message) \
-  ::testing::ScopedTrace GTEST_CONCAT_TOKEN_(gtest_trace_, __LINE__)(\
-    __FILE__, __LINE__, (message))
-
-// Compile-time assertion for type equality.
-// StaticAssertTypeEq<type1, type2>() compiles if and only if type1 and type2
-// are the same type.  The value it returns is not interesting.
-//
-// Instead of making StaticAssertTypeEq a class template, we make it a
-// function template that invokes a helper class template.  This
-// prevents a user from misusing StaticAssertTypeEq<T1, T2> by
-// defining objects of that type.
-//
-// CAVEAT:
-//
-// When used inside a method of a class template,
-// StaticAssertTypeEq<T1, T2>() is effective ONLY IF the method is
-// instantiated.  For example, given:
-//
-//   template <typename T> class Foo {
-//    public:
-//     void Bar() { testing::StaticAssertTypeEq<int, T>(); }
-//   };
-//
-// the code:
-//
-//   void Test1() { Foo<bool> foo; }
-//
-// will NOT generate a compiler error, as Foo<bool>::Bar() is never
-// actually instantiated.  Instead, you need:
-//
-//   void Test2() { Foo<bool> foo; foo.Bar(); }
-//
-// to cause a compiler error.
-template <typename T1, typename T2>
-constexpr bool StaticAssertTypeEq() noexcept {
-  static_assert(std::is_same<T1, T2>::value,
-                "type1 and type2 are not the same type");
-  return true;
-}
-
-// Defines a test.
-//
-// The first parameter is the name of the test suite, and the second
-// parameter is the name of the test within the test suite.
-//
-// The convention is to end the test suite name with "Test".  For
-// example, a test suite for the Foo class can be named FooTest.
-//
-// Test code should appear between braces after an invocation of
-// this macro.  Example:
-//
-//   TEST(FooTest, InitializesCorrectly) {
-//     Foo foo;
-//     EXPECT_TRUE(foo.StatusIsOK());
-//   }
-
-// Note that we call GetTestTypeId() instead of GetTypeId<
-// ::testing::Test>() here to get the type ID of testing::Test.  This
-// is to work around a suspected linker bug when using Google Test as
-// a framework on Mac OS X.  The bug causes GetTypeId<
-// ::testing::Test>() to return different values depending on whether
-// the call is from the Google Test framework itself or from user test
-// code.  GetTestTypeId() is guaranteed to always return the same
-// value, as it always calls GetTypeId<>() from the Google Test
-// framework.
-#define GTEST_TEST(test_suite_name, test_name)             \
-  GTEST_TEST_(test_suite_name, test_name, ::testing::Test, \
-              ::testing::internal::GetTestTypeId())
-
-// Define this macro to 1 to omit the definition of TEST(), which
-// is a generic name and clashes with some other libraries.
-#if !GTEST_DONT_DEFINE_TEST
-#define TEST(test_suite_name, test_name) GTEST_TEST(test_suite_name, test_name)
-#endif
-
-// Defines a test that uses a test fixture.
-//
-// The first parameter is the name of the test fixture class, which
-// also doubles as the test suite name.  The second parameter is the
-// name of the test within the test suite.
-//
-// A test fixture class must be declared earlier.  The user should put
-// the test code between braces after using this macro.  Example:
-//
-//   class FooTest : public testing::Test {
-//    protected:
-//     void SetUp() override { b_.AddElement(3); }
-//
-//     Foo a_;
-//     Foo b_;
-//   };
-//
-//   TEST_F(FooTest, InitializesCorrectly) {
-//     EXPECT_TRUE(a_.StatusIsOK());
-//   }
-//
-//   TEST_F(FooTest, ReturnsElementCountCorrectly) {
-//     EXPECT_EQ(a_.size(), 0);
-//     EXPECT_EQ(b_.size(), 1);
-//   }
-//
-// GOOGLETEST_CM0011 DO NOT DELETE
-#define TEST_F(test_fixture, test_name)\
-  GTEST_TEST_(test_fixture, test_name, test_fixture, \
-              ::testing::internal::GetTypeId<test_fixture>())
-
-// Returns a path to temporary directory.
-// Tries to determine an appropriate directory for the platform.
-GTEST_API_ std::string TempDir();
-
-#ifdef _MSC_VER
-#  pragma warning(pop)
-#endif
-
-// Dynamically registers a test with the framework.
-//
-// This is an advanced API only to be used when the `TEST` macros are
-// insufficient. The macros should be preferred when possible, as they avoid
-// most of the complexity of calling this function.
-//
-// The `factory` argument is a factory callable (move-constructible) object or
-// function pointer that creates a new instance of the Test object. It
-// handles ownership to the caller. The signature of the callable is
-// `Fixture*()`, where `Fixture` is the test fixture class for the test. All
-// tests registered with the same `test_suite_name` must return the same
-// fixture type. This is checked at runtime.
-//
-// The framework will infer the fixture class from the factory and will call
-// the `SetUpTestSuite` and `TearDownTestSuite` for it.
-//
-// Must be called before `RUN_ALL_TESTS()` is invoked, otherwise behavior is
-// undefined.
-//
-// Use case example:
-//
-// class MyFixture : public ::testing::Test {
-//  public:
-//   // All of these optional, just like in regular macro usage.
-//   static void SetUpTestSuite() { ... }
-//   static void TearDownTestSuite() { ... }
-//   void SetUp() override { ... }
-//   void TearDown() override { ... }
-// };
-//
-// class MyTest : public MyFixture {
-//  public:
-//   explicit MyTest(int data) : data_(data) {}
-//   void TestBody() override { ... }
-//
-//  private:
-//   int data_;
-// };
-//
-// void RegisterMyTests(const std::vector<int>& values) {
-//   for (int v : values) {
-//     ::testing::RegisterTest(
-//         "MyFixture", ("Test" + std::to_string(v)).c_str(), nullptr,
-//         std::to_string(v).c_str(),
-//         __FILE__, __LINE__,
-//         // Important to use the fixture type as the return type here.
-//         [=]() -> MyFixture* { return new MyTest(v); });
-//   }
-// }
-// ...
-// int main(int argc, char** argv) {
-//   std::vector<int> values_to_test = LoadValuesFromConfig();
-//   RegisterMyTests(values_to_test);
-//   ...
-//   return RUN_ALL_TESTS();
-// }
-//
-template <int&... ExplicitParameterBarrier, typename Factory>
-TestInfo* RegisterTest(const char* test_suite_name, const char* test_name,
-                       const char* type_param, const char* value_param,
-                       const char* file, int line, Factory factory) {
-  using TestT = typename std::remove_pointer<decltype(factory())>::type;
-
-  class FactoryImpl : public internal::TestFactoryBase {
-   public:
-    explicit FactoryImpl(Factory f) : factory_(std::move(f)) {}
-    Test* CreateTest() override { return factory_(); }
-
-   private:
-    Factory factory_;
-  };
-
-  return internal::MakeAndRegisterTestInfo(
-      test_suite_name, test_name, type_param, value_param,
-      internal::CodeLocation(file, line), internal::GetTypeId<TestT>(),
-      internal::SuiteApiResolver<TestT>::GetSetUpCaseOrSuite(file, line),
-      internal::SuiteApiResolver<TestT>::GetTearDownCaseOrSuite(file, line),
-      new FactoryImpl{std::move(factory)});
-}
-
-}  // namespace testing
-
-// Use this function in main() to run all tests.  It returns 0 if all
-// tests are successful, or 1 otherwise.
-//
-// RUN_ALL_TESTS() should be invoked after the command line has been
-// parsed by InitGoogleTest().
-//
-// This function was formerly a macro; thus, it is in the global
-// namespace and has an all-caps name.
-int RUN_ALL_TESTS() GTEST_MUST_USE_RESULT_;
-
-inline int RUN_ALL_TESTS() {
-  return ::testing::UnitTest::GetInstance()->Run();
-}
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_H_
diff --git a/3rdparty/gtest/include/gtest/gtest_pred_impl.h b/3rdparty/gtest/include/gtest/gtest_pred_impl.h
deleted file mode 100644
index d514255c..00000000
--- a/3rdparty/gtest/include/gtest/gtest_pred_impl.h
+++ /dev/null
@@ -1,359 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file is AUTOMATICALLY GENERATED on 01/02/2019 by command
-// 'gen_gtest_pred_impl.py 5'.  DO NOT EDIT BY HAND!
-//
-// Implements a family of generic predicate assertion macros.
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-#define GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-
-#include "gtest/gtest.h"
-
-namespace testing {
-
-// This header implements a family of generic predicate assertion
-// macros:
-//
-//   ASSERT_PRED_FORMAT1(pred_format, v1)
-//   ASSERT_PRED_FORMAT2(pred_format, v1, v2)
-//   ...
-//
-// where pred_format is a function or functor that takes n (in the
-// case of ASSERT_PRED_FORMATn) values and their source expression
-// text, and returns a testing::AssertionResult.  See the definition
-// of ASSERT_EQ in gtest.h for an example.
-//
-// If you don't care about formatting, you can use the more
-// restrictive version:
-//
-//   ASSERT_PRED1(pred, v1)
-//   ASSERT_PRED2(pred, v1, v2)
-//   ...
-//
-// where pred is an n-ary function or functor that returns bool,
-// and the values v1, v2, ..., must support the << operator for
-// streaming to std::ostream.
-//
-// We also define the EXPECT_* variations.
-//
-// For now we only support predicates whose arity is at most 5.
-// Please email googletestframework@googlegroups.com if you need
-// support for higher arities.
-
-// GTEST_ASSERT_ is the basic statement to which all of the assertions
-// in this file reduce.  Don't use this in your code.
-
-#define GTEST_ASSERT_(expression, on_failure) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (const ::testing::AssertionResult gtest_ar = (expression)) \
-    ; \
-  else \
-    on_failure(gtest_ar.failure_message())
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED1.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1>
-AssertionResult AssertPred1Helper(const char* pred_text,
-                                  const char* e1,
-                                  Pred pred,
-                                  const T1& v1) {
-  if (pred(v1)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT1.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT1_(pred_format, v1, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, v1), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED1.  Don't use
-// this in your code.
-#define GTEST_PRED1_(pred, v1, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred1Helper(#pred, \
-                                             #v1, \
-                                             pred, \
-                                             v1), on_failure)
-
-// Unary predicate assertion macros.
-#define EXPECT_PRED_FORMAT1(pred_format, v1) \
-  GTEST_PRED_FORMAT1_(pred_format, v1, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED1(pred, v1) \
-  GTEST_PRED1_(pred, v1, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT1(pred_format, v1) \
-  GTEST_PRED_FORMAT1_(pred_format, v1, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED1(pred, v1) \
-  GTEST_PRED1_(pred, v1, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED2.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2>
-AssertionResult AssertPred2Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2) {
-  if (pred(v1, v2)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2
-         << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT2.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT2_(pred_format, v1, v2, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, v1, v2), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED2.  Don't use
-// this in your code.
-#define GTEST_PRED2_(pred, v1, v2, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred2Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             pred, \
-                                             v1, \
-                                             v2), on_failure)
-
-// Binary predicate assertion macros.
-#define EXPECT_PRED_FORMAT2(pred_format, v1, v2) \
-  GTEST_PRED_FORMAT2_(pred_format, v1, v2, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED2(pred, v1, v2) \
-  GTEST_PRED2_(pred, v1, v2, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT2(pred_format, v1, v2) \
-  GTEST_PRED_FORMAT2_(pred_format, v1, v2, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED2(pred, v1, v2) \
-  GTEST_PRED2_(pred, v1, v2, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED3.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2,
-          typename T3>
-AssertionResult AssertPred3Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  const char* e3,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2,
-                                  const T3& v3) {
-  if (pred(v1, v2, v3)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2 << ", " << e3
-         << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
-         << e3 << " evaluates to " << ::testing::PrintToString(v3);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT3.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, v1, v2, v3), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED3.  Don't use
-// this in your code.
-#define GTEST_PRED3_(pred, v1, v2, v3, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred3Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             #v3, \
-                                             pred, \
-                                             v1, \
-                                             v2, \
-                                             v3), on_failure)
-
-// Ternary predicate assertion macros.
-#define EXPECT_PRED_FORMAT3(pred_format, v1, v2, v3) \
-  GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED3(pred, v1, v2, v3) \
-  GTEST_PRED3_(pred, v1, v2, v3, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT3(pred_format, v1, v2, v3) \
-  GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED3(pred, v1, v2, v3) \
-  GTEST_PRED3_(pred, v1, v2, v3, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED4.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2,
-          typename T3,
-          typename T4>
-AssertionResult AssertPred4Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  const char* e3,
-                                  const char* e4,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2,
-                                  const T3& v3,
-                                  const T4& v4) {
-  if (pred(v1, v2, v3, v4)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2 << ", " << e3 << ", " << e4
-         << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
-         << e3 << " evaluates to " << ::testing::PrintToString(v3) << "\n"
-         << e4 << " evaluates to " << ::testing::PrintToString(v4);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT4.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, #v4, v1, v2, v3, v4), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED4.  Don't use
-// this in your code.
-#define GTEST_PRED4_(pred, v1, v2, v3, v4, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred4Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             #v3, \
-                                             #v4, \
-                                             pred, \
-                                             v1, \
-                                             v2, \
-                                             v3, \
-                                             v4), on_failure)
-
-// 4-ary predicate assertion macros.
-#define EXPECT_PRED_FORMAT4(pred_format, v1, v2, v3, v4) \
-  GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED4(pred, v1, v2, v3, v4) \
-  GTEST_PRED4_(pred, v1, v2, v3, v4, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT4(pred_format, v1, v2, v3, v4) \
-  GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED4(pred, v1, v2, v3, v4) \
-  GTEST_PRED4_(pred, v1, v2, v3, v4, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED5.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2,
-          typename T3,
-          typename T4,
-          typename T5>
-AssertionResult AssertPred5Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  const char* e3,
-                                  const char* e4,
-                                  const char* e5,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2,
-                                  const T3& v3,
-                                  const T4& v4,
-                                  const T5& v5) {
-  if (pred(v1, v2, v3, v4, v5)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2 << ", " << e3 << ", " << e4
-         << ", " << e5 << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
-         << e3 << " evaluates to " << ::testing::PrintToString(v3) << "\n"
-         << e4 << " evaluates to " << ::testing::PrintToString(v4) << "\n"
-         << e5 << " evaluates to " << ::testing::PrintToString(v5);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT5.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, #v4, #v5, v1, v2, v3, v4, v5), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED5.  Don't use
-// this in your code.
-#define GTEST_PRED5_(pred, v1, v2, v3, v4, v5, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred5Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             #v3, \
-                                             #v4, \
-                                             #v5, \
-                                             pred, \
-                                             v1, \
-                                             v2, \
-                                             v3, \
-                                             v4, \
-                                             v5), on_failure)
-
-// 5-ary predicate assertion macros.
-#define EXPECT_PRED_FORMAT5(pred_format, v1, v2, v3, v4, v5) \
-  GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED5(pred, v1, v2, v3, v4, v5) \
-  GTEST_PRED5_(pred, v1, v2, v3, v4, v5, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT5(pred_format, v1, v2, v3, v4, v5) \
-  GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED5(pred, v1, v2, v3, v4, v5) \
-  GTEST_PRED5_(pred, v1, v2, v3, v4, v5, GTEST_FATAL_FAILURE_)
-
-
-
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
diff --git a/3rdparty/gtest/include/gtest/gtest_prod.h b/3rdparty/gtest/include/gtest/gtest_prod.h
deleted file mode 100644
index e651671e..00000000
--- a/3rdparty/gtest/include/gtest/gtest_prod.h
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Google C++ Testing and Mocking Framework definitions useful in production code.
-// GOOGLETEST_CM0003 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_PROD_H_
-#define GTEST_INCLUDE_GTEST_GTEST_PROD_H_
-
-// When you need to test the private or protected members of a class,
-// use the FRIEND_TEST macro to declare your tests as friends of the
-// class.  For example:
-//
-// class MyClass {
-//  private:
-//   void PrivateMethod();
-//   FRIEND_TEST(MyClassTest, PrivateMethodWorks);
-// };
-//
-// class MyClassTest : public testing::Test {
-//   // ...
-// };
-//
-// TEST_F(MyClassTest, PrivateMethodWorks) {
-//   // Can call MyClass::PrivateMethod() here.
-// }
-//
-// Note: The test class must be in the same namespace as the class being tested.
-// For example, putting MyClassTest in an anonymous namespace will not work.
-
-#define FRIEND_TEST(test_case_name, test_name)\
-friend class test_case_name##_##test_name##_Test
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_PROD_H_
diff --git a/3rdparty/gtest/include/gtest/internal/custom/README.md b/3rdparty/gtest/include/gtest/internal/custom/README.md
deleted file mode 100644
index ff391fb4..00000000
--- a/3rdparty/gtest/include/gtest/internal/custom/README.md
+++ /dev/null
@@ -1,56 +0,0 @@
-# Customization Points
-
-The custom directory is an injection point for custom user configurations.
-
-## Header `gtest.h`
-
-### The following macros can be defined:
-
-*   `GTEST_OS_STACK_TRACE_GETTER_` - The name of an implementation of
-    `OsStackTraceGetterInterface`.
-*   `GTEST_CUSTOM_TEMPDIR_FUNCTION_` - An override for `testing::TempDir()`. See
-    `testing::TempDir` for semantics and signature.
-
-## Header `gtest-port.h`
-
-The following macros can be defined:
-
-### Flag related macros:
-
-*   `GTEST_FLAG(flag_name)`
-*   `GTEST_USE_OWN_FLAGFILE_FLAG_` - Define to 0 when the system provides its
-    own flagfile flag parsing.
-*   `GTEST_DECLARE_bool_(name)`
-*   `GTEST_DECLARE_int32_(name)`
-*   `GTEST_DECLARE_string_(name)`
-*   `GTEST_DEFINE_bool_(name, default_val, doc)`
-*   `GTEST_DEFINE_int32_(name, default_val, doc)`
-*   `GTEST_DEFINE_string_(name, default_val, doc)`
-
-### Logging:
-
-*   `GTEST_LOG_(severity)`
-*   `GTEST_CHECK_(condition)`
-*   Functions `LogToStderr()` and `FlushInfoLog()` have to be provided too.
-
-### Threading:
-
-*   `GTEST_HAS_NOTIFICATION_` - Enabled if Notification is already provided.
-*   `GTEST_HAS_MUTEX_AND_THREAD_LOCAL_` - Enabled if `Mutex` and `ThreadLocal`
-    are already provided. Must also provide `GTEST_DECLARE_STATIC_MUTEX_(mutex)`
-    and `GTEST_DEFINE_STATIC_MUTEX_(mutex)`
-*   `GTEST_EXCLUSIVE_LOCK_REQUIRED_(locks)`
-*   `GTEST_LOCK_EXCLUDED_(locks)`
-
-### Underlying library support features
-
-*   `GTEST_HAS_CXXABI_H_`
-
-### Exporting API symbols:
-
-*   `GTEST_API_` - Specifier for exported symbols.
-
-## Header `gtest-printers.h`
-
-*   See documentation at `gtest/gtest-printers.h` for details on how to define a
-    custom printer.
diff --git a/3rdparty/gtest/include/gtest/internal/custom/gtest-port.h b/3rdparty/gtest/include/gtest/internal/custom/gtest-port.h
deleted file mode 100644
index cd85d956..00000000
--- a/3rdparty/gtest/include/gtest/internal/custom/gtest-port.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Injection point for custom user configurations. See README for details
-//
-// ** Custom implementation starts here **
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
diff --git a/3rdparty/gtest/include/gtest/internal/custom/gtest-printers.h b/3rdparty/gtest/include/gtest/internal/custom/gtest-printers.h
deleted file mode 100644
index eb4467ab..00000000
--- a/3rdparty/gtest/include/gtest/internal/custom/gtest-printers.h
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// This file provides an injection point for custom printers in a local
-// installation of gTest.
-// It will be included from gtest-printers.h and the overrides in this file
-// will be visible to everyone.
-//
-// Injection point for custom user configurations. See README for details
-//
-// ** Custom implementation starts here **
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
diff --git a/3rdparty/gtest/include/gtest/internal/custom/gtest.h b/3rdparty/gtest/include/gtest/internal/custom/gtest.h
deleted file mode 100644
index 4c8e07be..00000000
--- a/3rdparty/gtest/include/gtest/internal/custom/gtest.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Injection point for custom user configurations. See README for details
-//
-// ** Custom implementation starts here **
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_H_
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-death-test-internal.h b/3rdparty/gtest/include/gtest/internal/gtest-death-test-internal.h
deleted file mode 100644
index 68bd3530..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-death-test-internal.h
+++ /dev/null
@@ -1,304 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines internal utilities needed for implementing
-// death tests.  They are subject to change without notice.
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
-
-#include "gtest/gtest-matchers.h"
-#include "gtest/internal/gtest-internal.h"
-
-#include <stdio.h>
-#include <memory>
-
-namespace testing {
-namespace internal {
-
-GTEST_DECLARE_string_(internal_run_death_test);
-
-// Names of the flags (needed for parsing Google Test flags).
-const char kDeathTestStyleFlag[] = "death_test_style";
-const char kDeathTestUseFork[] = "death_test_use_fork";
-const char kInternalRunDeathTestFlag[] = "internal_run_death_test";
-
-#if GTEST_HAS_DEATH_TEST
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-// DeathTest is a class that hides much of the complexity of the
-// GTEST_DEATH_TEST_ macro.  It is abstract; its static Create method
-// returns a concrete class that depends on the prevailing death test
-// style, as defined by the --gtest_death_test_style and/or
-// --gtest_internal_run_death_test flags.
-
-// In describing the results of death tests, these terms are used with
-// the corresponding definitions:
-//
-// exit status:  The integer exit information in the format specified
-//               by wait(2)
-// exit code:    The integer code passed to exit(3), _exit(2), or
-//               returned from main()
-class GTEST_API_ DeathTest {
- public:
-  // Create returns false if there was an error determining the
-  // appropriate action to take for the current death test; for example,
-  // if the gtest_death_test_style flag is set to an invalid value.
-  // The LastMessage method will return a more detailed message in that
-  // case.  Otherwise, the DeathTest pointer pointed to by the "test"
-  // argument is set.  If the death test should be skipped, the pointer
-  // is set to NULL; otherwise, it is set to the address of a new concrete
-  // DeathTest object that controls the execution of the current test.
-  static bool Create(const char* statement, Matcher<const std::string&> matcher,
-                     const char* file, int line, DeathTest** test);
-  DeathTest();
-  virtual ~DeathTest() { }
-
-  // A helper class that aborts a death test when it's deleted.
-  class ReturnSentinel {
-   public:
-    explicit ReturnSentinel(DeathTest* test) : test_(test) { }
-    ~ReturnSentinel() { test_->Abort(TEST_ENCOUNTERED_RETURN_STATEMENT); }
-   private:
-    DeathTest* const test_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ReturnSentinel);
-  } GTEST_ATTRIBUTE_UNUSED_;
-
-  // An enumeration of possible roles that may be taken when a death
-  // test is encountered.  EXECUTE means that the death test logic should
-  // be executed immediately.  OVERSEE means that the program should prepare
-  // the appropriate environment for a child process to execute the death
-  // test, then wait for it to complete.
-  enum TestRole { OVERSEE_TEST, EXECUTE_TEST };
-
-  // An enumeration of the three reasons that a test might be aborted.
-  enum AbortReason {
-    TEST_ENCOUNTERED_RETURN_STATEMENT,
-    TEST_THREW_EXCEPTION,
-    TEST_DID_NOT_DIE
-  };
-
-  // Assumes one of the above roles.
-  virtual TestRole AssumeRole() = 0;
-
-  // Waits for the death test to finish and returns its status.
-  virtual int Wait() = 0;
-
-  // Returns true if the death test passed; that is, the test process
-  // exited during the test, its exit status matches a user-supplied
-  // predicate, and its stderr output matches a user-supplied regular
-  // expression.
-  // The user-supplied predicate may be a macro expression rather
-  // than a function pointer or functor, or else Wait and Passed could
-  // be combined.
-  virtual bool Passed(bool exit_status_ok) = 0;
-
-  // Signals that the death test did not die as expected.
-  virtual void Abort(AbortReason reason) = 0;
-
-  // Returns a human-readable outcome message regarding the outcome of
-  // the last death test.
-  static const char* LastMessage();
-
-  static void set_last_death_test_message(const std::string& message);
-
- private:
-  // A string containing a description of the outcome of the last death test.
-  static std::string last_death_test_message_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DeathTest);
-};
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// Factory interface for death tests.  May be mocked out for testing.
-class DeathTestFactory {
- public:
-  virtual ~DeathTestFactory() { }
-  virtual bool Create(const char* statement,
-                      Matcher<const std::string&> matcher, const char* file,
-                      int line, DeathTest** test) = 0;
-};
-
-// A concrete DeathTestFactory implementation for normal use.
-class DefaultDeathTestFactory : public DeathTestFactory {
- public:
-  bool Create(const char* statement, Matcher<const std::string&> matcher,
-              const char* file, int line, DeathTest** test) override;
-};
-
-// Returns true if exit_status describes a process that was terminated
-// by a signal, or exited normally with a nonzero exit code.
-GTEST_API_ bool ExitedUnsuccessfully(int exit_status);
-
-// A string passed to EXPECT_DEATH (etc.) is caught by one of these overloads
-// and interpreted as a regex (rather than an Eq matcher) for legacy
-// compatibility.
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(
-    ::testing::internal::RE regex) {
-  return ContainsRegex(regex.pattern());
-}
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(const char* regex) {
-  return ContainsRegex(regex);
-}
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(
-    const ::std::string& regex) {
-  return ContainsRegex(regex);
-}
-
-// If a Matcher<const ::std::string&> is passed to EXPECT_DEATH (etc.), it's
-// used directly.
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(
-    Matcher<const ::std::string&> matcher) {
-  return matcher;
-}
-
-// Traps C++ exceptions escaping statement and reports them as test
-// failures. Note that trapping SEH exceptions is not implemented here.
-# if GTEST_HAS_EXCEPTIONS
-#  define GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, death_test) \
-  try { \
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-  } catch (const ::std::exception& gtest_exception) { \
-    fprintf(\
-        stderr, \
-        "\n%s: Caught std::exception-derived exception escaping the " \
-        "death test statement. Exception message: %s\n", \
-        ::testing::internal::FormatFileLocation(__FILE__, __LINE__).c_str(), \
-        gtest_exception.what()); \
-    fflush(stderr); \
-    death_test->Abort(::testing::internal::DeathTest::TEST_THREW_EXCEPTION); \
-  } catch (...) { \
-    death_test->Abort(::testing::internal::DeathTest::TEST_THREW_EXCEPTION); \
-  }
-
-# else
-#  define GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, death_test) \
-  GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
-
-# endif
-
-// This macro is for implementing ASSERT_DEATH*, EXPECT_DEATH*,
-// ASSERT_EXIT*, and EXPECT_EXIT*.
-#define GTEST_DEATH_TEST_(statement, predicate, regex_or_matcher, fail)        \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                                \
-  if (::testing::internal::AlwaysTrue()) {                                     \
-    ::testing::internal::DeathTest* gtest_dt;                                  \
-    if (!::testing::internal::DeathTest::Create(                               \
-            #statement,                                                        \
-            ::testing::internal::MakeDeathTestMatcher(regex_or_matcher),       \
-            __FILE__, __LINE__, &gtest_dt)) {                                  \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__);                        \
-    }                                                                          \
-    if (gtest_dt != nullptr) {                                                 \
-      std::unique_ptr< ::testing::internal::DeathTest> gtest_dt_ptr(gtest_dt); \
-      switch (gtest_dt->AssumeRole()) {                                        \
-        case ::testing::internal::DeathTest::OVERSEE_TEST:                     \
-          if (!gtest_dt->Passed(predicate(gtest_dt->Wait()))) {                \
-            goto GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__);                  \
-          }                                                                    \
-          break;                                                               \
-        case ::testing::internal::DeathTest::EXECUTE_TEST: {                   \
-          ::testing::internal::DeathTest::ReturnSentinel gtest_sentinel(       \
-              gtest_dt);                                                       \
-          GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, gtest_dt);            \
-          gtest_dt->Abort(::testing::internal::DeathTest::TEST_DID_NOT_DIE);   \
-          break;                                                               \
-        }                                                                      \
-        default:                                                               \
-          break;                                                               \
-      }                                                                        \
-    }                                                                          \
-  } else                                                                       \
-    GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__)                                \
-        : fail(::testing::internal::DeathTest::LastMessage())
-// The symbol "fail" here expands to something into which a message
-// can be streamed.
-
-// This macro is for implementing ASSERT/EXPECT_DEBUG_DEATH when compiled in
-// NDEBUG mode. In this case we need the statements to be executed and the macro
-// must accept a streamed message even though the message is never printed.
-// The regex object is not evaluated, but it is used to prevent "unused"
-// warnings and to avoid an expression that doesn't compile in debug mode.
-#define GTEST_EXECUTE_STATEMENT_(statement, regex_or_matcher)    \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                  \
-  if (::testing::internal::AlwaysTrue()) {                       \
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement);   \
-  } else if (!::testing::internal::AlwaysTrue()) {               \
-    ::testing::internal::MakeDeathTestMatcher(regex_or_matcher); \
-  } else                                                         \
-    ::testing::Message()
-
-// A class representing the parsed contents of the
-// --gtest_internal_run_death_test flag, as it existed when
-// RUN_ALL_TESTS was called.
-class InternalRunDeathTestFlag {
- public:
-  InternalRunDeathTestFlag(const std::string& a_file,
-                           int a_line,
-                           int an_index,
-                           int a_write_fd)
-      : file_(a_file), line_(a_line), index_(an_index),
-        write_fd_(a_write_fd) {}
-
-  ~InternalRunDeathTestFlag() {
-    if (write_fd_ >= 0)
-      posix::Close(write_fd_);
-  }
-
-  const std::string& file() const { return file_; }
-  int line() const { return line_; }
-  int index() const { return index_; }
-  int write_fd() const { return write_fd_; }
-
- private:
-  std::string file_;
-  int line_;
-  int index_;
-  int write_fd_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(InternalRunDeathTestFlag);
-};
-
-// Returns a newly created InternalRunDeathTestFlag object with fields
-// initialized from the GTEST_FLAG(internal_run_death_test) flag if
-// the flag is specified; otherwise returns NULL.
-InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag();
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-filepath.h b/3rdparty/gtest/include/gtest/internal/gtest-filepath.h
deleted file mode 100644
index c11b1015..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-filepath.h
+++ /dev/null
@@ -1,211 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Google Test filepath utilities
-//
-// This header file declares classes and functions used internally by
-// Google Test.  They are subject to change without notice.
-//
-// This file is #included in gtest/internal/gtest-internal.h.
-// Do not include this header file separately!
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
-
-#include "gtest/internal/gtest-string.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-namespace internal {
-
-// FilePath - a class for file and directory pathname manipulation which
-// handles platform-specific conventions (like the pathname separator).
-// Used for helper functions for naming files in a directory for xml output.
-// Except for Set methods, all methods are const or static, which provides an
-// "immutable value object" -- useful for peace of mind.
-// A FilePath with a value ending in a path separator ("like/this/") represents
-// a directory, otherwise it is assumed to represent a file. In either case,
-// it may or may not represent an actual file or directory in the file system.
-// Names are NOT checked for syntax correctness -- no checking for illegal
-// characters, malformed paths, etc.
-
-class GTEST_API_ FilePath {
- public:
-  FilePath() : pathname_("") { }
-  FilePath(const FilePath& rhs) : pathname_(rhs.pathname_) { }
-
-  explicit FilePath(const std::string& pathname) : pathname_(pathname) {
-    Normalize();
-  }
-
-  FilePath& operator=(const FilePath& rhs) {
-    Set(rhs);
-    return *this;
-  }
-
-  void Set(const FilePath& rhs) {
-    pathname_ = rhs.pathname_;
-  }
-
-  const std::string& string() const { return pathname_; }
-  const char* c_str() const { return pathname_.c_str(); }
-
-  // Returns the current working directory, or "" if unsuccessful.
-  static FilePath GetCurrentDir();
-
-  // Given directory = "dir", base_name = "test", number = 0,
-  // extension = "xml", returns "dir/test.xml". If number is greater
-  // than zero (e.g., 12), returns "dir/test_12.xml".
-  // On Windows platform, uses \ as the separator rather than /.
-  static FilePath MakeFileName(const FilePath& directory,
-                               const FilePath& base_name,
-                               int number,
-                               const char* extension);
-
-  // Given directory = "dir", relative_path = "test.xml",
-  // returns "dir/test.xml".
-  // On Windows, uses \ as the separator rather than /.
-  static FilePath ConcatPaths(const FilePath& directory,
-                              const FilePath& relative_path);
-
-  // Returns a pathname for a file that does not currently exist. The pathname
-  // will be directory/base_name.extension or
-  // directory/base_name_<number>.extension if directory/base_name.extension
-  // already exists. The number will be incremented until a pathname is found
-  // that does not already exist.
-  // Examples: 'dir/foo_test.xml' or 'dir/foo_test_1.xml'.
-  // There could be a race condition if two or more processes are calling this
-  // function at the same time -- they could both pick the same filename.
-  static FilePath GenerateUniqueFileName(const FilePath& directory,
-                                         const FilePath& base_name,
-                                         const char* extension);
-
-  // Returns true if and only if the path is "".
-  bool IsEmpty() const { return pathname_.empty(); }
-
-  // If input name has a trailing separator character, removes it and returns
-  // the name, otherwise return the name string unmodified.
-  // On Windows platform, uses \ as the separator, other platforms use /.
-  FilePath RemoveTrailingPathSeparator() const;
-
-  // Returns a copy of the FilePath with the directory part removed.
-  // Example: FilePath("path/to/file").RemoveDirectoryName() returns
-  // FilePath("file"). If there is no directory part ("just_a_file"), it returns
-  // the FilePath unmodified. If there is no file part ("just_a_dir/") it
-  // returns an empty FilePath ("").
-  // On Windows platform, '\' is the path separator, otherwise it is '/'.
-  FilePath RemoveDirectoryName() const;
-
-  // RemoveFileName returns the directory path with the filename removed.
-  // Example: FilePath("path/to/file").RemoveFileName() returns "path/to/".
-  // If the FilePath is "a_file" or "/a_file", RemoveFileName returns
-  // FilePath("./") or, on Windows, FilePath(".\\"). If the filepath does
-  // not have a file, like "just/a/dir/", it returns the FilePath unmodified.
-  // On Windows platform, '\' is the path separator, otherwise it is '/'.
-  FilePath RemoveFileName() const;
-
-  // Returns a copy of the FilePath with the case-insensitive extension removed.
-  // Example: FilePath("dir/file.exe").RemoveExtension("EXE") returns
-  // FilePath("dir/file"). If a case-insensitive extension is not
-  // found, returns a copy of the original FilePath.
-  FilePath RemoveExtension(const char* extension) const;
-
-  // Creates directories so that path exists. Returns true if successful or if
-  // the directories already exist; returns false if unable to create
-  // directories for any reason. Will also return false if the FilePath does
-  // not represent a directory (that is, it doesn't end with a path separator).
-  bool CreateDirectoriesRecursively() const;
-
-  // Create the directory so that path exists. Returns true if successful or
-  // if the directory already exists; returns false if unable to create the
-  // directory for any reason, including if the parent directory does not
-  // exist. Not named "CreateDirectory" because that's a macro on Windows.
-  bool CreateFolder() const;
-
-  // Returns true if FilePath describes something in the file-system,
-  // either a file, directory, or whatever, and that something exists.
-  bool FileOrDirectoryExists() const;
-
-  // Returns true if pathname describes a directory in the file-system
-  // that exists.
-  bool DirectoryExists() const;
-
-  // Returns true if FilePath ends with a path separator, which indicates that
-  // it is intended to represent a directory. Returns false otherwise.
-  // This does NOT check that a directory (or file) actually exists.
-  bool IsDirectory() const;
-
-  // Returns true if pathname describes a root directory. (Windows has one
-  // root directory per disk drive.)
-  bool IsRootDirectory() const;
-
-  // Returns true if pathname describes an absolute path.
-  bool IsAbsolutePath() const;
-
- private:
-  // Replaces multiple consecutive separators with a single separator.
-  // For example, "bar///foo" becomes "bar/foo". Does not eliminate other
-  // redundancies that might be in a pathname involving "." or "..".
-  //
-  // A pathname with multiple consecutive separators may occur either through
-  // user error or as a result of some scripts or APIs that generate a pathname
-  // with a trailing separator. On other platforms the same API or script
-  // may NOT generate a pathname with a trailing "/". Then elsewhere that
-  // pathname may have another "/" and pathname components added to it,
-  // without checking for the separator already being there.
-  // The script language and operating system may allow paths like "foo//bar"
-  // but some of the functions in FilePath will not handle that correctly. In
-  // particular, RemoveTrailingPathSeparator() only removes one separator, and
-  // it is called in CreateDirectoriesRecursively() assuming that it will change
-  // a pathname from directory syntax (trailing separator) to filename syntax.
-  //
-  // On Windows this method also replaces the alternate path separator '/' with
-  // the primary path separator '\\', so that for example "bar\\/\\foo" becomes
-  // "bar\\foo".
-
-  void Normalize();
-
-  // Returns a pointer to the last occurence of a valid path separator in
-  // the FilePath. On Windows, for example, both '/' and '\' are valid path
-  // separators. Returns NULL if no path separator was found.
-  const char* FindLastPathSeparator() const;
-
-  std::string pathname_;
-};  // class FilePath
-
-}  // namespace internal
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-internal.h b/3rdparty/gtest/include/gtest/internal/gtest-internal.h
deleted file mode 100644
index 94c816a2..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-internal.h
+++ /dev/null
@@ -1,1380 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file declares functions and macros used internally by
-// Google Test.  They are subject to change without notice.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
-
-#include "gtest/internal/gtest-port.h"
-
-#if GTEST_OS_LINUX
-# include <stdlib.h>
-# include <sys/types.h>
-# include <sys/wait.h>
-# include <unistd.h>
-#endif  // GTEST_OS_LINUX
-
-#if GTEST_HAS_EXCEPTIONS
-# include <stdexcept>
-#endif
-
-#include <ctype.h>
-#include <float.h>
-#include <string.h>
-#include <iomanip>
-#include <limits>
-#include <map>
-#include <set>
-#include <string>
-#include <type_traits>
-#include <vector>
-
-#include "gtest/gtest-message.h"
-#include "gtest/internal/gtest-filepath.h"
-#include "gtest/internal/gtest-string.h"
-#include "gtest/internal/gtest-type-util.h"
-
-// Due to C++ preprocessor weirdness, we need double indirection to
-// concatenate two tokens when one of them is __LINE__.  Writing
-//
-//   foo ## __LINE__
-//
-// will result in the token foo__LINE__, instead of foo followed by
-// the current line number.  For more details, see
-// http://www.parashift.com/c++-faq-lite/misc-technical-issues.html#faq-39.6
-#define GTEST_CONCAT_TOKEN_(foo, bar) GTEST_CONCAT_TOKEN_IMPL_(foo, bar)
-#define GTEST_CONCAT_TOKEN_IMPL_(foo, bar) foo ## bar
-
-// Stringifies its argument.
-#define GTEST_STRINGIFY_(name) #name
-
-namespace proto2 { class Message; }
-
-namespace testing {
-
-// Forward declarations.
-
-class AssertionResult;                 // Result of an assertion.
-class Message;                         // Represents a failure message.
-class Test;                            // Represents a test.
-class TestInfo;                        // Information about a test.
-class TestPartResult;                  // Result of a test part.
-class UnitTest;                        // A collection of test suites.
-
-template <typename T>
-::std::string PrintToString(const T& value);
-
-namespace internal {
-
-struct TraceInfo;                      // Information about a trace point.
-class TestInfoImpl;                    // Opaque implementation of TestInfo
-class UnitTestImpl;                    // Opaque implementation of UnitTest
-
-// The text used in failure messages to indicate the start of the
-// stack trace.
-GTEST_API_ extern const char kStackTraceMarker[];
-
-// An IgnoredValue object can be implicitly constructed from ANY value.
-class IgnoredValue {
-  struct Sink {};
- public:
-  // This constructor template allows any value to be implicitly
-  // converted to IgnoredValue.  The object has no data member and
-  // doesn't try to remember anything about the argument.  We
-  // deliberately omit the 'explicit' keyword in order to allow the
-  // conversion to be implicit.
-  // Disable the conversion if T already has a magical conversion operator.
-  // Otherwise we get ambiguity.
-  template <typename T,
-            typename std::enable_if<!std::is_convertible<T, Sink>::value,
-                                    int>::type = 0>
-  IgnoredValue(const T& /* ignored */) {}  // NOLINT(runtime/explicit)
-};
-
-// Appends the user-supplied message to the Google-Test-generated message.
-GTEST_API_ std::string AppendUserMessage(
-    const std::string& gtest_msg, const Message& user_msg);
-
-#if GTEST_HAS_EXCEPTIONS
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4275 \
-/* an exported class was derived from a class that was not exported */)
-
-// This exception is thrown by (and only by) a failed Google Test
-// assertion when GTEST_FLAG(throw_on_failure) is true (if exceptions
-// are enabled).  We derive it from std::runtime_error, which is for
-// errors presumably detectable only at run time.  Since
-// std::runtime_error inherits from std::exception, many testing
-// frameworks know how to extract and print the message inside it.
-class GTEST_API_ GoogleTestFailureException : public ::std::runtime_error {
- public:
-  explicit GoogleTestFailureException(const TestPartResult& failure);
-};
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4275
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-namespace edit_distance {
-// Returns the optimal edits to go from 'left' to 'right'.
-// All edits cost the same, with replace having lower priority than
-// add/remove.
-// Simple implementation of the Wagner-Fischer algorithm.
-// See http://en.wikipedia.org/wiki/Wagner-Fischer_algorithm
-enum EditType { kMatch, kAdd, kRemove, kReplace };
-GTEST_API_ std::vector<EditType> CalculateOptimalEdits(
-    const std::vector<size_t>& left, const std::vector<size_t>& right);
-
-// Same as above, but the input is represented as strings.
-GTEST_API_ std::vector<EditType> CalculateOptimalEdits(
-    const std::vector<std::string>& left,
-    const std::vector<std::string>& right);
-
-// Create a diff of the input strings in Unified diff format.
-GTEST_API_ std::string CreateUnifiedDiff(const std::vector<std::string>& left,
-                                         const std::vector<std::string>& right,
-                                         size_t context = 2);
-
-}  // namespace edit_distance
-
-// Calculate the diff between 'left' and 'right' and return it in unified diff
-// format.
-// If not null, stores in 'total_line_count' the total number of lines found
-// in left + right.
-GTEST_API_ std::string DiffStrings(const std::string& left,
-                                   const std::string& right,
-                                   size_t* total_line_count);
-
-// Constructs and returns the message for an equality assertion
-// (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
-//
-// The first four parameters are the expressions used in the assertion
-// and their values, as strings.  For example, for ASSERT_EQ(foo, bar)
-// where foo is 5 and bar is 6, we have:
-//
-//   expected_expression: "foo"
-//   actual_expression:   "bar"
-//   expected_value:      "5"
-//   actual_value:        "6"
-//
-// The ignoring_case parameter is true if and only if the assertion is a
-// *_STRCASEEQ*.  When it's true, the string " (ignoring case)" will
-// be inserted into the message.
-GTEST_API_ AssertionResult EqFailure(const char* expected_expression,
-                                     const char* actual_expression,
-                                     const std::string& expected_value,
-                                     const std::string& actual_value,
-                                     bool ignoring_case);
-
-// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
-GTEST_API_ std::string GetBoolAssertionFailureMessage(
-    const AssertionResult& assertion_result,
-    const char* expression_text,
-    const char* actual_predicate_value,
-    const char* expected_predicate_value);
-
-// This template class represents an IEEE floating-point number
-// (either single-precision or double-precision, depending on the
-// template parameters).
-//
-// The purpose of this class is to do more sophisticated number
-// comparison.  (Due to round-off error, etc, it's very unlikely that
-// two floating-points will be equal exactly.  Hence a naive
-// comparison by the == operation often doesn't work.)
-//
-// Format of IEEE floating-point:
-//
-//   The most-significant bit being the leftmost, an IEEE
-//   floating-point looks like
-//
-//     sign_bit exponent_bits fraction_bits
-//
-//   Here, sign_bit is a single bit that designates the sign of the
-//   number.
-//
-//   For float, there are 8 exponent bits and 23 fraction bits.
-//
-//   For double, there are 11 exponent bits and 52 fraction bits.
-//
-//   More details can be found at
-//   http://en.wikipedia.org/wiki/IEEE_floating-point_standard.
-//
-// Template parameter:
-//
-//   RawType: the raw floating-point type (either float or double)
-template <typename RawType>
-class FloatingPoint {
- public:
-  // Defines the unsigned integer type that has the same size as the
-  // floating point number.
-  typedef typename TypeWithSize<sizeof(RawType)>::UInt Bits;
-
-  // Constants.
-
-  // # of bits in a number.
-  static const size_t kBitCount = 8*sizeof(RawType);
-
-  // # of fraction bits in a number.
-  static const size_t kFractionBitCount =
-    std::numeric_limits<RawType>::digits - 1;
-
-  // # of exponent bits in a number.
-  static const size_t kExponentBitCount = kBitCount - 1 - kFractionBitCount;
-
-  // The mask for the sign bit.
-  static const Bits kSignBitMask = static_cast<Bits>(1) << (kBitCount - 1);
-
-  // The mask for the fraction bits.
-  static const Bits kFractionBitMask =
-    ~static_cast<Bits>(0) >> (kExponentBitCount + 1);
-
-  // The mask for the exponent bits.
-  static const Bits kExponentBitMask = ~(kSignBitMask | kFractionBitMask);
-
-  // How many ULP's (Units in the Last Place) we want to tolerate when
-  // comparing two numbers.  The larger the value, the more error we
-  // allow.  A 0 value means that two numbers must be exactly the same
-  // to be considered equal.
-  //
-  // The maximum error of a single floating-point operation is 0.5
-  // units in the last place.  On Intel CPU's, all floating-point
-  // calculations are done with 80-bit precision, while double has 64
-  // bits.  Therefore, 4 should be enough for ordinary use.
-  //
-  // See the following article for more details on ULP:
-  // http://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/
-  static const size_t kMaxUlps = 4;
-
-  // Constructs a FloatingPoint from a raw floating-point number.
-  //
-  // On an Intel CPU, passing a non-normalized NAN (Not a Number)
-  // around may change its bits, although the new value is guaranteed
-  // to be also a NAN.  Therefore, don't expect this constructor to
-  // preserve the bits in x when x is a NAN.
-  explicit FloatingPoint(const RawType& x) { u_.value_ = x; }
-
-  // Static methods
-
-  // Reinterprets a bit pattern as a floating-point number.
-  //
-  // This function is needed to test the AlmostEquals() method.
-  static RawType ReinterpretBits(const Bits bits) {
-    FloatingPoint fp(0);
-    fp.u_.bits_ = bits;
-    return fp.u_.value_;
-  }
-
-  // Returns the floating-point number that represent positive infinity.
-  static RawType Infinity() {
-    return ReinterpretBits(kExponentBitMask);
-  }
-
-  // Returns the maximum representable finite floating-point number.
-  static RawType Max();
-
-  // Non-static methods
-
-  // Returns the bits that represents this number.
-  const Bits &bits() const { return u_.bits_; }
-
-  // Returns the exponent bits of this number.
-  Bits exponent_bits() const { return kExponentBitMask & u_.bits_; }
-
-  // Returns the fraction bits of this number.
-  Bits fraction_bits() const { return kFractionBitMask & u_.bits_; }
-
-  // Returns the sign bit of this number.
-  Bits sign_bit() const { return kSignBitMask & u_.bits_; }
-
-  // Returns true if and only if this is NAN (not a number).
-  bool is_nan() const {
-    // It's a NAN if the exponent bits are all ones and the fraction
-    // bits are not entirely zeros.
-    return (exponent_bits() == kExponentBitMask) && (fraction_bits() != 0);
-  }
-
-  // Returns true if and only if this number is at most kMaxUlps ULP's away
-  // from rhs.  In particular, this function:
-  //
-  //   - returns false if either number is (or both are) NAN.
-  //   - treats really large numbers as almost equal to infinity.
-  //   - thinks +0.0 and -0.0 are 0 DLP's apart.
-  bool AlmostEquals(const FloatingPoint& rhs) const {
-    // The IEEE standard says that any comparison operation involving
-    // a NAN must return false.
-    if (is_nan() || rhs.is_nan()) return false;
-
-    return DistanceBetweenSignAndMagnitudeNumbers(u_.bits_, rhs.u_.bits_)
-        <= kMaxUlps;
-  }
-
- private:
-  // The data type used to store the actual floating-point number.
-  union FloatingPointUnion {
-    RawType value_;  // The raw floating-point number.
-    Bits bits_;      // The bits that represent the number.
-  };
-
-  // Converts an integer from the sign-and-magnitude representation to
-  // the biased representation.  More precisely, let N be 2 to the
-  // power of (kBitCount - 1), an integer x is represented by the
-  // unsigned number x + N.
-  //
-  // For instance,
-  //
-  //   -N + 1 (the most negative number representable using
-  //          sign-and-magnitude) is represented by 1;
-  //   0      is represented by N; and
-  //   N - 1  (the biggest number representable using
-  //          sign-and-magnitude) is represented by 2N - 1.
-  //
-  // Read http://en.wikipedia.org/wiki/Signed_number_representations
-  // for more details on signed number representations.
-  static Bits SignAndMagnitudeToBiased(const Bits &sam) {
-    if (kSignBitMask & sam) {
-      // sam represents a negative number.
-      return ~sam + 1;
-    } else {
-      // sam represents a positive number.
-      return kSignBitMask | sam;
-    }
-  }
-
-  // Given two numbers in the sign-and-magnitude representation,
-  // returns the distance between them as an unsigned number.
-  static Bits DistanceBetweenSignAndMagnitudeNumbers(const Bits &sam1,
-                                                     const Bits &sam2) {
-    const Bits biased1 = SignAndMagnitudeToBiased(sam1);
-    const Bits biased2 = SignAndMagnitudeToBiased(sam2);
-    return (biased1 >= biased2) ? (biased1 - biased2) : (biased2 - biased1);
-  }
-
-  FloatingPointUnion u_;
-};
-
-// We cannot use std::numeric_limits<T>::max() as it clashes with the max()
-// macro defined by <windows.h>.
-template <>
-inline float FloatingPoint<float>::Max() { return FLT_MAX; }
-template <>
-inline double FloatingPoint<double>::Max() { return DBL_MAX; }
-
-// Typedefs the instances of the FloatingPoint template class that we
-// care to use.
-typedef FloatingPoint<float> Float;
-typedef FloatingPoint<double> Double;
-
-// In order to catch the mistake of putting tests that use different
-// test fixture classes in the same test suite, we need to assign
-// unique IDs to fixture classes and compare them.  The TypeId type is
-// used to hold such IDs.  The user should treat TypeId as an opaque
-// type: the only operation allowed on TypeId values is to compare
-// them for equality using the == operator.
-typedef const void* TypeId;
-
-template <typename T>
-class TypeIdHelper {
- public:
-  // dummy_ must not have a const type.  Otherwise an overly eager
-  // compiler (e.g. MSVC 7.1 & 8.0) may try to merge
-  // TypeIdHelper<T>::dummy_ for different Ts as an "optimization".
-  static bool dummy_;
-};
-
-template <typename T>
-bool TypeIdHelper<T>::dummy_ = false;
-
-// GetTypeId<T>() returns the ID of type T.  Different values will be
-// returned for different types.  Calling the function twice with the
-// same type argument is guaranteed to return the same ID.
-template <typename T>
-TypeId GetTypeId() {
-  // The compiler is required to allocate a different
-  // TypeIdHelper<T>::dummy_ variable for each T used to instantiate
-  // the template.  Therefore, the address of dummy_ is guaranteed to
-  // be unique.
-  return &(TypeIdHelper<T>::dummy_);
-}
-
-// Returns the type ID of ::testing::Test.  Always call this instead
-// of GetTypeId< ::testing::Test>() to get the type ID of
-// ::testing::Test, as the latter may give the wrong result due to a
-// suspected linker bug when compiling Google Test as a Mac OS X
-// framework.
-GTEST_API_ TypeId GetTestTypeId();
-
-// Defines the abstract factory interface that creates instances
-// of a Test object.
-class TestFactoryBase {
- public:
-  virtual ~TestFactoryBase() {}
-
-  // Creates a test instance to run. The instance is both created and destroyed
-  // within TestInfoImpl::Run()
-  virtual Test* CreateTest() = 0;
-
- protected:
-  TestFactoryBase() {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestFactoryBase);
-};
-
-// This class provides implementation of TeastFactoryBase interface.
-// It is used in TEST and TEST_F macros.
-template <class TestClass>
-class TestFactoryImpl : public TestFactoryBase {
- public:
-  Test* CreateTest() override { return new TestClass; }
-};
-
-#if GTEST_OS_WINDOWS
-
-// Predicate-formatters for implementing the HRESULT checking macros
-// {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}
-// We pass a long instead of HRESULT to avoid causing an
-// include dependency for the HRESULT type.
-GTEST_API_ AssertionResult IsHRESULTSuccess(const char* expr,
-                                            long hr);  // NOLINT
-GTEST_API_ AssertionResult IsHRESULTFailure(const char* expr,
-                                            long hr);  // NOLINT
-
-#endif  // GTEST_OS_WINDOWS
-
-// Types of SetUpTestSuite() and TearDownTestSuite() functions.
-using SetUpTestSuiteFunc = void (*)();
-using TearDownTestSuiteFunc = void (*)();
-
-struct CodeLocation {
-  CodeLocation(const std::string& a_file, int a_line)
-      : file(a_file), line(a_line) {}
-
-  std::string file;
-  int line;
-};
-
-//  Helper to identify which setup function for TestCase / TestSuite to call.
-//  Only one function is allowed, either TestCase or TestSute but not both.
-
-// Utility functions to help SuiteApiResolver
-using SetUpTearDownSuiteFuncType = void (*)();
-
-inline SetUpTearDownSuiteFuncType GetNotDefaultOrNull(
-    SetUpTearDownSuiteFuncType a, SetUpTearDownSuiteFuncType def) {
-  return a == def ? nullptr : a;
-}
-
-template <typename T>
-//  Note that SuiteApiResolver inherits from T because
-//  SetUpTestSuite()/TearDownTestSuite() could be protected. Ths way
-//  SuiteApiResolver can access them.
-struct SuiteApiResolver : T {
-  // testing::Test is only forward declared at this point. So we make it a
-  // dependend class for the compiler to be OK with it.
-  using Test =
-      typename std::conditional<sizeof(T) != 0, ::testing::Test, void>::type;
-
-  static SetUpTearDownSuiteFuncType GetSetUpCaseOrSuite(const char* filename,
-                                                        int line_num) {
-    SetUpTearDownSuiteFuncType test_case_fp =
-        GetNotDefaultOrNull(&T::SetUpTestCase, &Test::SetUpTestCase);
-    SetUpTearDownSuiteFuncType test_suite_fp =
-        GetNotDefaultOrNull(&T::SetUpTestSuite, &Test::SetUpTestSuite);
-
-    GTEST_CHECK_(!test_case_fp || !test_suite_fp)
-        << "Test can not provide both SetUpTestSuite and SetUpTestCase, please "
-           "make sure there is only one present at "
-        << filename << ":" << line_num;
-
-    return test_case_fp != nullptr ? test_case_fp : test_suite_fp;
-  }
-
-  static SetUpTearDownSuiteFuncType GetTearDownCaseOrSuite(const char* filename,
-                                                           int line_num) {
-    SetUpTearDownSuiteFuncType test_case_fp =
-        GetNotDefaultOrNull(&T::TearDownTestCase, &Test::TearDownTestCase);
-    SetUpTearDownSuiteFuncType test_suite_fp =
-        GetNotDefaultOrNull(&T::TearDownTestSuite, &Test::TearDownTestSuite);
-
-    GTEST_CHECK_(!test_case_fp || !test_suite_fp)
-        << "Test can not provide both TearDownTestSuite and TearDownTestCase,"
-           " please make sure there is only one present at"
-        << filename << ":" << line_num;
-
-    return test_case_fp != nullptr ? test_case_fp : test_suite_fp;
-  }
-};
-
-// Creates a new TestInfo object and registers it with Google Test;
-// returns the created object.
-//
-// Arguments:
-//
-//   test_suite_name:   name of the test suite
-//   name:             name of the test
-//   type_param        the name of the test's type parameter, or NULL if
-//                     this is not a typed or a type-parameterized test.
-//   value_param       text representation of the test's value parameter,
-//                     or NULL if this is not a type-parameterized test.
-//   code_location:    code location where the test is defined
-//   fixture_class_id: ID of the test fixture class
-//   set_up_tc:        pointer to the function that sets up the test suite
-//   tear_down_tc:     pointer to the function that tears down the test suite
-//   factory:          pointer to the factory that creates a test object.
-//                     The newly created TestInfo instance will assume
-//                     ownership of the factory object.
-GTEST_API_ TestInfo* MakeAndRegisterTestInfo(
-    const char* test_suite_name, const char* name, const char* type_param,
-    const char* value_param, CodeLocation code_location,
-    TypeId fixture_class_id, SetUpTestSuiteFunc set_up_tc,
-    TearDownTestSuiteFunc tear_down_tc, TestFactoryBase* factory);
-
-// If *pstr starts with the given prefix, modifies *pstr to be right
-// past the prefix and returns true; otherwise leaves *pstr unchanged
-// and returns false.  None of pstr, *pstr, and prefix can be NULL.
-GTEST_API_ bool SkipPrefix(const char* prefix, const char** pstr);
-
-#if GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-// State of the definition of a type-parameterized test suite.
-class GTEST_API_ TypedTestSuitePState {
- public:
-  TypedTestSuitePState() : registered_(false) {}
-
-  // Adds the given test name to defined_test_names_ and return true
-  // if the test suite hasn't been registered; otherwise aborts the
-  // program.
-  bool AddTestName(const char* file, int line, const char* case_name,
-                   const char* test_name) {
-    if (registered_) {
-      fprintf(stderr,
-              "%s Test %s must be defined before "
-              "REGISTER_TYPED_TEST_SUITE_P(%s, ...).\n",
-              FormatFileLocation(file, line).c_str(), test_name, case_name);
-      fflush(stderr);
-      posix::Abort();
-    }
-    registered_tests_.insert(
-        ::std::make_pair(test_name, CodeLocation(file, line)));
-    return true;
-  }
-
-  bool TestExists(const std::string& test_name) const {
-    return registered_tests_.count(test_name) > 0;
-  }
-
-  const CodeLocation& GetCodeLocation(const std::string& test_name) const {
-    RegisteredTestsMap::const_iterator it = registered_tests_.find(test_name);
-    GTEST_CHECK_(it != registered_tests_.end());
-    return it->second;
-  }
-
-  // Verifies that registered_tests match the test names in
-  // defined_test_names_; returns registered_tests if successful, or
-  // aborts the program otherwise.
-  const char* VerifyRegisteredTestNames(
-      const char* file, int line, const char* registered_tests);
-
- private:
-  typedef ::std::map<std::string, CodeLocation> RegisteredTestsMap;
-
-  bool registered_;
-  RegisteredTestsMap registered_tests_;
-};
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-using TypedTestCasePState = TypedTestSuitePState;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// Skips to the first non-space char after the first comma in 'str';
-// returns NULL if no comma is found in 'str'.
-inline const char* SkipComma(const char* str) {
-  const char* comma = strchr(str, ',');
-  if (comma == nullptr) {
-    return nullptr;
-  }
-  while (IsSpace(*(++comma))) {}
-  return comma;
-}
-
-// Returns the prefix of 'str' before the first comma in it; returns
-// the entire string if it contains no comma.
-inline std::string GetPrefixUntilComma(const char* str) {
-  const char* comma = strchr(str, ',');
-  return comma == nullptr ? str : std::string(str, comma);
-}
-
-// Splits a given string on a given delimiter, populating a given
-// vector with the fields.
-void SplitString(const ::std::string& str, char delimiter,
-                 ::std::vector< ::std::string>* dest);
-
-// The default argument to the template below for the case when the user does
-// not provide a name generator.
-struct DefaultNameGenerator {
-  template <typename T>
-  static std::string GetName(int i) {
-    return StreamableToString(i);
-  }
-};
-
-template <typename Provided = DefaultNameGenerator>
-struct NameGeneratorSelector {
-  typedef Provided type;
-};
-
-template <typename NameGenerator>
-void GenerateNamesRecursively(Types0, std::vector<std::string>*, int) {}
-
-template <typename NameGenerator, typename Types>
-void GenerateNamesRecursively(Types, std::vector<std::string>* result, int i) {
-  result->push_back(NameGenerator::template GetName<typename Types::Head>(i));
-  GenerateNamesRecursively<NameGenerator>(typename Types::Tail(), result,
-                                          i + 1);
-}
-
-template <typename NameGenerator, typename Types>
-std::vector<std::string> GenerateNames() {
-  std::vector<std::string> result;
-  GenerateNamesRecursively<NameGenerator>(Types(), &result, 0);
-  return result;
-}
-
-// TypeParameterizedTest<Fixture, TestSel, Types>::Register()
-// registers a list of type-parameterized tests with Google Test.  The
-// return value is insignificant - we just need to return something
-// such that we can call this function in a namespace scope.
-//
-// Implementation note: The GTEST_TEMPLATE_ macro declares a template
-// template parameter.  It's defined in gtest-type-util.h.
-template <GTEST_TEMPLATE_ Fixture, class TestSel, typename Types>
-class TypeParameterizedTest {
- public:
-  // 'index' is the index of the test in the type list 'Types'
-  // specified in INSTANTIATE_TYPED_TEST_SUITE_P(Prefix, TestSuite,
-  // Types).  Valid values for 'index' are [0, N - 1] where N is the
-  // length of Types.
-  static bool Register(const char* prefix, const CodeLocation& code_location,
-                       const char* case_name, const char* test_names, int index,
-                       const std::vector<std::string>& type_names =
-                           GenerateNames<DefaultNameGenerator, Types>()) {
-    typedef typename Types::Head Type;
-    typedef Fixture<Type> FixtureClass;
-    typedef typename GTEST_BIND_(TestSel, Type) TestClass;
-
-    // First, registers the first type-parameterized test in the type
-    // list.
-    MakeAndRegisterTestInfo(
-        (std::string(prefix) + (prefix[0] == '\0' ? "" : "/") + case_name +
-         "/" + type_names[static_cast<size_t>(index)])
-            .c_str(),
-        StripTrailingSpaces(GetPrefixUntilComma(test_names)).c_str(),
-        GetTypeName<Type>().c_str(),
-        nullptr,  // No value parameter.
-        code_location, GetTypeId<FixtureClass>(),
-        SuiteApiResolver<TestClass>::GetSetUpCaseOrSuite(
-            code_location.file.c_str(), code_location.line),
-        SuiteApiResolver<TestClass>::GetTearDownCaseOrSuite(
-            code_location.file.c_str(), code_location.line),
-        new TestFactoryImpl<TestClass>);
-
-    // Next, recurses (at compile time) with the tail of the type list.
-    return TypeParameterizedTest<Fixture, TestSel,
-                                 typename Types::Tail>::Register(prefix,
-                                                                 code_location,
-                                                                 case_name,
-                                                                 test_names,
-                                                                 index + 1,
-                                                                 type_names);
-  }
-};
-
-// The base case for the compile time recursion.
-template <GTEST_TEMPLATE_ Fixture, class TestSel>
-class TypeParameterizedTest<Fixture, TestSel, Types0> {
- public:
-  static bool Register(const char* /*prefix*/, const CodeLocation&,
-                       const char* /*case_name*/, const char* /*test_names*/,
-                       int /*index*/,
-                       const std::vector<std::string>& =
-                           std::vector<std::string>() /*type_names*/) {
-    return true;
-  }
-};
-
-// TypeParameterizedTestSuite<Fixture, Tests, Types>::Register()
-// registers *all combinations* of 'Tests' and 'Types' with Google
-// Test.  The return value is insignificant - we just need to return
-// something such that we can call this function in a namespace scope.
-template <GTEST_TEMPLATE_ Fixture, typename Tests, typename Types>
-class TypeParameterizedTestSuite {
- public:
-  static bool Register(const char* prefix, CodeLocation code_location,
-                       const TypedTestSuitePState* state, const char* case_name,
-                       const char* test_names,
-                       const std::vector<std::string>& type_names =
-                           GenerateNames<DefaultNameGenerator, Types>()) {
-    std::string test_name = StripTrailingSpaces(
-        GetPrefixUntilComma(test_names));
-    if (!state->TestExists(test_name)) {
-      fprintf(stderr, "Failed to get code location for test %s.%s at %s.",
-              case_name, test_name.c_str(),
-              FormatFileLocation(code_location.file.c_str(),
-                                 code_location.line).c_str());
-      fflush(stderr);
-      posix::Abort();
-    }
-    const CodeLocation& test_location = state->GetCodeLocation(test_name);
-
-    typedef typename Tests::Head Head;
-
-    // First, register the first test in 'Test' for each type in 'Types'.
-    TypeParameterizedTest<Fixture, Head, Types>::Register(
-        prefix, test_location, case_name, test_names, 0, type_names);
-
-    // Next, recurses (at compile time) with the tail of the test list.
-    return TypeParameterizedTestSuite<Fixture, typename Tests::Tail,
-                                      Types>::Register(prefix, code_location,
-                                                       state, case_name,
-                                                       SkipComma(test_names),
-                                                       type_names);
-  }
-};
-
-// The base case for the compile time recursion.
-template <GTEST_TEMPLATE_ Fixture, typename Types>
-class TypeParameterizedTestSuite<Fixture, Templates0, Types> {
- public:
-  static bool Register(const char* /*prefix*/, const CodeLocation&,
-                       const TypedTestSuitePState* /*state*/,
-                       const char* /*case_name*/, const char* /*test_names*/,
-                       const std::vector<std::string>& =
-                           std::vector<std::string>() /*type_names*/) {
-    return true;
-  }
-};
-
-#endif  // GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
-
-// Returns the current OS stack trace as an std::string.
-//
-// The maximum number of stack frames to be included is specified by
-// the gtest_stack_trace_depth flag.  The skip_count parameter
-// specifies the number of top frames to be skipped, which doesn't
-// count against the number of frames to be included.
-//
-// For example, if Foo() calls Bar(), which in turn calls
-// GetCurrentOsStackTraceExceptTop(..., 1), Foo() will be included in
-// the trace but Bar() and GetCurrentOsStackTraceExceptTop() won't.
-GTEST_API_ std::string GetCurrentOsStackTraceExceptTop(
-    UnitTest* unit_test, int skip_count);
-
-// Helpers for suppressing warnings on unreachable code or constant
-// condition.
-
-// Always returns true.
-GTEST_API_ bool AlwaysTrue();
-
-// Always returns false.
-inline bool AlwaysFalse() { return !AlwaysTrue(); }
-
-// Helper for suppressing false warning from Clang on a const char*
-// variable declared in a conditional expression always being NULL in
-// the else branch.
-struct GTEST_API_ ConstCharPtr {
-  ConstCharPtr(const char* str) : value(str) {}
-  operator bool() const { return true; }
-  const char* value;
-};
-
-// A simple Linear Congruential Generator for generating random
-// numbers with a uniform distribution.  Unlike rand() and srand(), it
-// doesn't use global state (and therefore can't interfere with user
-// code).  Unlike rand_r(), it's portable.  An LCG isn't very random,
-// but it's good enough for our purposes.
-class GTEST_API_ Random {
- public:
-  static const UInt32 kMaxRange = 1u << 31;
-
-  explicit Random(UInt32 seed) : state_(seed) {}
-
-  void Reseed(UInt32 seed) { state_ = seed; }
-
-  // Generates a random number from [0, range).  Crashes if 'range' is
-  // 0 or greater than kMaxRange.
-  UInt32 Generate(UInt32 range);
-
- private:
-  UInt32 state_;
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Random);
-};
-
-// Turns const U&, U&, const U, and U all into U.
-#define GTEST_REMOVE_REFERENCE_AND_CONST_(T) \
-  typename std::remove_const<typename std::remove_reference<T>::type>::type
-
-// IsAProtocolMessage<T>::value is a compile-time bool constant that's
-// true if and only if T is type proto2::Message or a subclass of it.
-template <typename T>
-struct IsAProtocolMessage
-    : public bool_constant<
-          std::is_convertible<const T*, const ::proto2::Message*>::value> {};
-
-// When the compiler sees expression IsContainerTest<C>(0), if C is an
-// STL-style container class, the first overload of IsContainerTest
-// will be viable (since both C::iterator* and C::const_iterator* are
-// valid types and NULL can be implicitly converted to them).  It will
-// be picked over the second overload as 'int' is a perfect match for
-// the type of argument 0.  If C::iterator or C::const_iterator is not
-// a valid type, the first overload is not viable, and the second
-// overload will be picked.  Therefore, we can determine whether C is
-// a container class by checking the type of IsContainerTest<C>(0).
-// The value of the expression is insignificant.
-//
-// In C++11 mode we check the existence of a const_iterator and that an
-// iterator is properly implemented for the container.
-//
-// For pre-C++11 that we look for both C::iterator and C::const_iterator.
-// The reason is that C++ injects the name of a class as a member of the
-// class itself (e.g. you can refer to class iterator as either
-// 'iterator' or 'iterator::iterator').  If we look for C::iterator
-// only, for example, we would mistakenly think that a class named
-// iterator is an STL container.
-//
-// Also note that the simpler approach of overloading
-// IsContainerTest(typename C::const_iterator*) and
-// IsContainerTest(...) doesn't work with Visual Age C++ and Sun C++.
-typedef int IsContainer;
-template <class C,
-          class Iterator = decltype(::std::declval<const C&>().begin()),
-          class = decltype(::std::declval<const C&>().end()),
-          class = decltype(++::std::declval<Iterator&>()),
-          class = decltype(*::std::declval<Iterator>()),
-          class = typename C::const_iterator>
-IsContainer IsContainerTest(int /* dummy */) {
-  return 0;
-}
-
-typedef char IsNotContainer;
-template <class C>
-IsNotContainer IsContainerTest(long /* dummy */) { return '\0'; }
-
-// Trait to detect whether a type T is a hash table.
-// The heuristic used is that the type contains an inner type `hasher` and does
-// not contain an inner type `reverse_iterator`.
-// If the container is iterable in reverse, then order might actually matter.
-template <typename T>
-struct IsHashTable {
- private:
-  template <typename U>
-  static char test(typename U::hasher*, typename U::reverse_iterator*);
-  template <typename U>
-  static int test(typename U::hasher*, ...);
-  template <typename U>
-  static char test(...);
-
- public:
-  static const bool value = sizeof(test<T>(nullptr, nullptr)) == sizeof(int);
-};
-
-template <typename T>
-const bool IsHashTable<T>::value;
-
-template <typename C,
-          bool = sizeof(IsContainerTest<C>(0)) == sizeof(IsContainer)>
-struct IsRecursiveContainerImpl;
-
-template <typename C>
-struct IsRecursiveContainerImpl<C, false> : public std::false_type {};
-
-// Since the IsRecursiveContainerImpl depends on the IsContainerTest we need to
-// obey the same inconsistencies as the IsContainerTest, namely check if
-// something is a container is relying on only const_iterator in C++11 and
-// is relying on both const_iterator and iterator otherwise
-template <typename C>
-struct IsRecursiveContainerImpl<C, true> {
-  using value_type = decltype(*std::declval<typename C::const_iterator>());
-  using type =
-      std::is_same<typename std::remove_const<
-                       typename std::remove_reference<value_type>::type>::type,
-                   C>;
-};
-
-// IsRecursiveContainer<Type> is a unary compile-time predicate that
-// evaluates whether C is a recursive container type. A recursive container
-// type is a container type whose value_type is equal to the container type
-// itself. An example for a recursive container type is
-// boost::filesystem::path, whose iterator has a value_type that is equal to
-// boost::filesystem::path.
-template <typename C>
-struct IsRecursiveContainer : public IsRecursiveContainerImpl<C>::type {};
-
-// Utilities for native arrays.
-
-// ArrayEq() compares two k-dimensional native arrays using the
-// elements' operator==, where k can be any integer >= 0.  When k is
-// 0, ArrayEq() degenerates into comparing a single pair of values.
-
-template <typename T, typename U>
-bool ArrayEq(const T* lhs, size_t size, const U* rhs);
-
-// This generic version is used when k is 0.
-template <typename T, typename U>
-inline bool ArrayEq(const T& lhs, const U& rhs) { return lhs == rhs; }
-
-// This overload is used when k >= 1.
-template <typename T, typename U, size_t N>
-inline bool ArrayEq(const T(&lhs)[N], const U(&rhs)[N]) {
-  return internal::ArrayEq(lhs, N, rhs);
-}
-
-// This helper reduces code bloat.  If we instead put its logic inside
-// the previous ArrayEq() function, arrays with different sizes would
-// lead to different copies of the template code.
-template <typename T, typename U>
-bool ArrayEq(const T* lhs, size_t size, const U* rhs) {
-  for (size_t i = 0; i != size; i++) {
-    if (!internal::ArrayEq(lhs[i], rhs[i]))
-      return false;
-  }
-  return true;
-}
-
-// Finds the first element in the iterator range [begin, end) that
-// equals elem.  Element may be a native array type itself.
-template <typename Iter, typename Element>
-Iter ArrayAwareFind(Iter begin, Iter end, const Element& elem) {
-  for (Iter it = begin; it != end; ++it) {
-    if (internal::ArrayEq(*it, elem))
-      return it;
-  }
-  return end;
-}
-
-// CopyArray() copies a k-dimensional native array using the elements'
-// operator=, where k can be any integer >= 0.  When k is 0,
-// CopyArray() degenerates into copying a single value.
-
-template <typename T, typename U>
-void CopyArray(const T* from, size_t size, U* to);
-
-// This generic version is used when k is 0.
-template <typename T, typename U>
-inline void CopyArray(const T& from, U* to) { *to = from; }
-
-// This overload is used when k >= 1.
-template <typename T, typename U, size_t N>
-inline void CopyArray(const T(&from)[N], U(*to)[N]) {
-  internal::CopyArray(from, N, *to);
-}
-
-// This helper reduces code bloat.  If we instead put its logic inside
-// the previous CopyArray() function, arrays with different sizes
-// would lead to different copies of the template code.
-template <typename T, typename U>
-void CopyArray(const T* from, size_t size, U* to) {
-  for (size_t i = 0; i != size; i++) {
-    internal::CopyArray(from[i], to + i);
-  }
-}
-
-// The relation between an NativeArray object (see below) and the
-// native array it represents.
-// We use 2 different structs to allow non-copyable types to be used, as long
-// as RelationToSourceReference() is passed.
-struct RelationToSourceReference {};
-struct RelationToSourceCopy {};
-
-// Adapts a native array to a read-only STL-style container.  Instead
-// of the complete STL container concept, this adaptor only implements
-// members useful for Google Mock's container matchers.  New members
-// should be added as needed.  To simplify the implementation, we only
-// support Element being a raw type (i.e. having no top-level const or
-// reference modifier).  It's the client's responsibility to satisfy
-// this requirement.  Element can be an array type itself (hence
-// multi-dimensional arrays are supported).
-template <typename Element>
-class NativeArray {
- public:
-  // STL-style container typedefs.
-  typedef Element value_type;
-  typedef Element* iterator;
-  typedef const Element* const_iterator;
-
-  // Constructs from a native array. References the source.
-  NativeArray(const Element* array, size_t count, RelationToSourceReference) {
-    InitRef(array, count);
-  }
-
-  // Constructs from a native array. Copies the source.
-  NativeArray(const Element* array, size_t count, RelationToSourceCopy) {
-    InitCopy(array, count);
-  }
-
-  // Copy constructor.
-  NativeArray(const NativeArray& rhs) {
-    (this->*rhs.clone_)(rhs.array_, rhs.size_);
-  }
-
-  ~NativeArray() {
-    if (clone_ != &NativeArray::InitRef)
-      delete[] array_;
-  }
-
-  // STL-style container methods.
-  size_t size() const { return size_; }
-  const_iterator begin() const { return array_; }
-  const_iterator end() const { return array_ + size_; }
-  bool operator==(const NativeArray& rhs) const {
-    return size() == rhs.size() &&
-        ArrayEq(begin(), size(), rhs.begin());
-  }
-
- private:
-  static_assert(!std::is_const<Element>::value, "Type must not be const");
-  static_assert(!std::is_reference<Element>::value,
-                "Type must not be a reference");
-
-  // Initializes this object with a copy of the input.
-  void InitCopy(const Element* array, size_t a_size) {
-    Element* const copy = new Element[a_size];
-    CopyArray(array, a_size, copy);
-    array_ = copy;
-    size_ = a_size;
-    clone_ = &NativeArray::InitCopy;
-  }
-
-  // Initializes this object with a reference of the input.
-  void InitRef(const Element* array, size_t a_size) {
-    array_ = array;
-    size_ = a_size;
-    clone_ = &NativeArray::InitRef;
-  }
-
-  const Element* array_;
-  size_t size_;
-  void (NativeArray::*clone_)(const Element*, size_t);
-
-  GTEST_DISALLOW_ASSIGN_(NativeArray);
-};
-
-// Backport of std::index_sequence.
-template <size_t... Is>
-struct IndexSequence {
-  using type = IndexSequence;
-};
-
-// Double the IndexSequence, and one if plus_one is true.
-template <bool plus_one, typename T, size_t sizeofT>
-struct DoubleSequence;
-template <size_t... I, size_t sizeofT>
-struct DoubleSequence<true, IndexSequence<I...>, sizeofT> {
-  using type = IndexSequence<I..., (sizeofT + I)..., 2 * sizeofT>;
-};
-template <size_t... I, size_t sizeofT>
-struct DoubleSequence<false, IndexSequence<I...>, sizeofT> {
-  using type = IndexSequence<I..., (sizeofT + I)...>;
-};
-
-// Backport of std::make_index_sequence.
-// It uses O(ln(N)) instantiation depth.
-template <size_t N>
-struct MakeIndexSequence
-    : DoubleSequence<N % 2 == 1, typename MakeIndexSequence<N / 2>::type,
-                     N / 2>::type {};
-
-template <>
-struct MakeIndexSequence<0> : IndexSequence<> {};
-
-// FIXME: This implementation of ElemFromList is O(1) in instantiation depth,
-// but it is O(N^2) in total instantiations. Not sure if this is the best
-// tradeoff, as it will make it somewhat slow to compile.
-template <typename T, size_t, size_t>
-struct ElemFromListImpl {};
-
-template <typename T, size_t I>
-struct ElemFromListImpl<T, I, I> {
-  using type = T;
-};
-
-// Get the Nth element from T...
-// It uses O(1) instantiation depth.
-template <size_t N, typename I, typename... T>
-struct ElemFromList;
-
-template <size_t N, size_t... I, typename... T>
-struct ElemFromList<N, IndexSequence<I...>, T...>
-    : ElemFromListImpl<T, N, I>... {};
-
-template <typename... T>
-class FlatTuple;
-
-template <typename Derived, size_t I>
-struct FlatTupleElemBase;
-
-template <typename... T, size_t I>
-struct FlatTupleElemBase<FlatTuple<T...>, I> {
-  using value_type =
-      typename ElemFromList<I, typename MakeIndexSequence<sizeof...(T)>::type,
-                            T...>::type;
-  FlatTupleElemBase() = default;
-  explicit FlatTupleElemBase(value_type t) : value(std::move(t)) {}
-  value_type value;
-};
-
-template <typename Derived, typename Idx>
-struct FlatTupleBase;
-
-template <size_t... Idx, typename... T>
-struct FlatTupleBase<FlatTuple<T...>, IndexSequence<Idx...>>
-    : FlatTupleElemBase<FlatTuple<T...>, Idx>... {
-  using Indices = IndexSequence<Idx...>;
-  FlatTupleBase() = default;
-  explicit FlatTupleBase(T... t)
-      : FlatTupleElemBase<FlatTuple<T...>, Idx>(std::move(t))... {}
-};
-
-// Analog to std::tuple but with different tradeoffs.
-// This class minimizes the template instantiation depth, thus allowing more
-// elements that std::tuple would. std::tuple has been seen to require an
-// instantiation depth of more than 10x the number of elements in some
-// implementations.
-// FlatTuple and ElemFromList are not recursive and have a fixed depth
-// regardless of T...
-// MakeIndexSequence, on the other hand, it is recursive but with an
-// instantiation depth of O(ln(N)).
-template <typename... T>
-class FlatTuple
-    : private FlatTupleBase<FlatTuple<T...>,
-                            typename MakeIndexSequence<sizeof...(T)>::type> {
-  using Indices = typename FlatTuple::FlatTupleBase::Indices;
-
- public:
-  FlatTuple() = default;
-  explicit FlatTuple(T... t) : FlatTuple::FlatTupleBase(std::move(t)...) {}
-
-  template <size_t I>
-  const typename ElemFromList<I, Indices, T...>::type& Get() const {
-    return static_cast<const FlatTupleElemBase<FlatTuple, I>*>(this)->value;
-  }
-
-  template <size_t I>
-  typename ElemFromList<I, Indices, T...>::type& Get() {
-    return static_cast<FlatTupleElemBase<FlatTuple, I>*>(this)->value;
-  }
-};
-
-// Utility functions to be called with static_assert to induce deprecation
-// warnings.
-GTEST_INTERNAL_DEPRECATED(
-    "INSTANTIATE_TEST_CASE_P is deprecated, please use "
-    "INSTANTIATE_TEST_SUITE_P")
-constexpr bool InstantiateTestCase_P_IsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "TYPED_TEST_CASE_P is deprecated, please use "
-    "TYPED_TEST_SUITE_P")
-constexpr bool TypedTestCase_P_IsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "TYPED_TEST_CASE is deprecated, please use "
-    "TYPED_TEST_SUITE")
-constexpr bool TypedTestCaseIsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "REGISTER_TYPED_TEST_CASE_P is deprecated, please use "
-    "REGISTER_TYPED_TEST_SUITE_P")
-constexpr bool RegisterTypedTestCase_P_IsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "INSTANTIATE_TYPED_TEST_CASE_P is deprecated, please use "
-    "INSTANTIATE_TYPED_TEST_SUITE_P")
-constexpr bool InstantiateTypedTestCase_P_IsDeprecated() { return true; }
-
-}  // namespace internal
-}  // namespace testing
-
-#define GTEST_MESSAGE_AT_(file, line, message, result_type) \
-  ::testing::internal::AssertHelper(result_type, file, line, message) \
-    = ::testing::Message()
-
-#define GTEST_MESSAGE_(message, result_type) \
-  GTEST_MESSAGE_AT_(__FILE__, __LINE__, message, result_type)
-
-#define GTEST_FATAL_FAILURE_(message) \
-  return GTEST_MESSAGE_(message, ::testing::TestPartResult::kFatalFailure)
-
-#define GTEST_NONFATAL_FAILURE_(message) \
-  GTEST_MESSAGE_(message, ::testing::TestPartResult::kNonFatalFailure)
-
-#define GTEST_SUCCESS_(message) \
-  GTEST_MESSAGE_(message, ::testing::TestPartResult::kSuccess)
-
-#define GTEST_SKIP_(message) \
-  return GTEST_MESSAGE_(message, ::testing::TestPartResult::kSkip)
-
-// Suppress MSVC warning 4072 (unreachable code) for the code following
-// statement if it returns or throws (or doesn't return or throw in some
-// situations).
-#define GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement) \
-  if (::testing::internal::AlwaysTrue()) { statement; }
-
-#define GTEST_TEST_THROW_(statement, expected_exception, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::ConstCharPtr gtest_msg = "") { \
-    bool gtest_caught_expected = false; \
-    try { \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    } \
-    catch (expected_exception const&) { \
-      gtest_caught_expected = true; \
-    } \
-    catch (...) { \
-      gtest_msg.value = \
-          "Expected: " #statement " throws an exception of type " \
-          #expected_exception ".\n  Actual: it throws a different type."; \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
-    } \
-    if (!gtest_caught_expected) { \
-      gtest_msg.value = \
-          "Expected: " #statement " throws an exception of type " \
-          #expected_exception ".\n  Actual: it throws nothing."; \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__): \
-      fail(gtest_msg.value)
-
-#define GTEST_TEST_NO_THROW_(statement, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::AlwaysTrue()) { \
-    try { \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    } \
-    catch (...) { \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__): \
-      fail("Expected: " #statement " doesn't throw an exception.\n" \
-           "  Actual: it throws.")
-
-#define GTEST_TEST_ANY_THROW_(statement, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::AlwaysTrue()) { \
-    bool gtest_caught_any = false; \
-    try { \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    } \
-    catch (...) { \
-      gtest_caught_any = true; \
-    } \
-    if (!gtest_caught_any) { \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testanythrow_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testanythrow_, __LINE__): \
-      fail("Expected: " #statement " throws an exception.\n" \
-           "  Actual: it doesn't.")
-
-
-// Implements Boolean test assertions such as EXPECT_TRUE. expression can be
-// either a boolean expression or an AssertionResult. text is a textual
-// represenation of expression as it was passed into the EXPECT_TRUE.
-#define GTEST_TEST_BOOLEAN_(expression, text, actual, expected, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (const ::testing::AssertionResult gtest_ar_ = \
-      ::testing::AssertionResult(expression)) \
-    ; \
-  else \
-    fail(::testing::internal::GetBoolAssertionFailureMessage(\
-        gtest_ar_, text, #actual, #expected).c_str())
-
-#define GTEST_TEST_NO_FATAL_FAILURE_(statement, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::AlwaysTrue()) { \
-    ::testing::internal::HasNewFatalFailureHelper gtest_fatal_failure_checker; \
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    if (gtest_fatal_failure_checker.has_new_fatal_failure()) { \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testnofatal_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testnofatal_, __LINE__): \
-      fail("Expected: " #statement " doesn't generate new fatal " \
-           "failures in the current thread.\n" \
-           "  Actual: it does.")
-
-// Expands to the name of the class that implements the given test.
-#define GTEST_TEST_CLASS_NAME_(test_suite_name, test_name) \
-  test_suite_name##_##test_name##_Test
-
-// Helper macro for defining tests.
-#define GTEST_TEST_(test_suite_name, test_name, parent_class, parent_id)      \
-  static_assert(sizeof(GTEST_STRINGIFY_(test_suite_name)) > 1,                \
-                "test_suite_name must not be empty");                         \
-  static_assert(sizeof(GTEST_STRINGIFY_(test_name)) > 1,                      \
-                "test_name must not be empty");                               \
-  class GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)                    \
-      : public parent_class {                                                 \
-   public:                                                                    \
-    GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() {}                   \
-                                                                              \
-   private:                                                                   \
-    virtual void TestBody();                                                  \
-    static ::testing::TestInfo* const test_info_ GTEST_ATTRIBUTE_UNUSED_;     \
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name,   \
-                                                           test_name));       \
-  };                                                                          \
-                                                                              \
-  ::testing::TestInfo* const GTEST_TEST_CLASS_NAME_(test_suite_name,          \
-                                                    test_name)::test_info_ =  \
-      ::testing::internal::MakeAndRegisterTestInfo(                           \
-          #test_suite_name, #test_name, nullptr, nullptr,                     \
-          ::testing::internal::CodeLocation(__FILE__, __LINE__), (parent_id), \
-          ::testing::internal::SuiteApiResolver<                              \
-              parent_class>::GetSetUpCaseOrSuite(__FILE__, __LINE__),         \
-          ::testing::internal::SuiteApiResolver<                              \
-              parent_class>::GetTearDownCaseOrSuite(__FILE__, __LINE__),      \
-          new ::testing::internal::TestFactoryImpl<GTEST_TEST_CLASS_NAME_(    \
-              test_suite_name, test_name)>);                                  \
-  void GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::TestBody()
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-param-util.h b/3rdparty/gtest/include/gtest/internal/gtest-param-util.h
deleted file mode 100644
index 97533993..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-param-util.h
+++ /dev/null
@@ -1,883 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Type and function utilities for implementing parameterized tests.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
-
-#include <ctype.h>
-
-#include <cassert>
-#include <iterator>
-#include <memory>
-#include <set>
-#include <tuple>
-#include <utility>
-#include <vector>
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-port.h"
-#include "gtest/gtest-printers.h"
-
-namespace testing {
-// Input to a parameterized test name generator, describing a test parameter.
-// Consists of the parameter value and the integer parameter index.
-template <class ParamType>
-struct TestParamInfo {
-  TestParamInfo(const ParamType& a_param, size_t an_index) :
-    param(a_param),
-    index(an_index) {}
-  ParamType param;
-  size_t index;
-};
-
-// A builtin parameterized test name generator which returns the result of
-// testing::PrintToString.
-struct PrintToStringParamName {
-  template <class ParamType>
-  std::string operator()(const TestParamInfo<ParamType>& info) const {
-    return PrintToString(info.param);
-  }
-};
-
-namespace internal {
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-// Utility Functions
-
-// Outputs a message explaining invalid registration of different
-// fixture class for the same test suite. This may happen when
-// TEST_P macro is used to define two tests with the same name
-// but in different namespaces.
-GTEST_API_ void ReportInvalidTestSuiteType(const char* test_suite_name,
-                                           CodeLocation code_location);
-
-template <typename> class ParamGeneratorInterface;
-template <typename> class ParamGenerator;
-
-// Interface for iterating over elements provided by an implementation
-// of ParamGeneratorInterface<T>.
-template <typename T>
-class ParamIteratorInterface {
- public:
-  virtual ~ParamIteratorInterface() {}
-  // A pointer to the base generator instance.
-  // Used only for the purposes of iterator comparison
-  // to make sure that two iterators belong to the same generator.
-  virtual const ParamGeneratorInterface<T>* BaseGenerator() const = 0;
-  // Advances iterator to point to the next element
-  // provided by the generator. The caller is responsible
-  // for not calling Advance() on an iterator equal to
-  // BaseGenerator()->End().
-  virtual void Advance() = 0;
-  // Clones the iterator object. Used for implementing copy semantics
-  // of ParamIterator<T>.
-  virtual ParamIteratorInterface* Clone() const = 0;
-  // Dereferences the current iterator and provides (read-only) access
-  // to the pointed value. It is the caller's responsibility not to call
-  // Current() on an iterator equal to BaseGenerator()->End().
-  // Used for implementing ParamGenerator<T>::operator*().
-  virtual const T* Current() const = 0;
-  // Determines whether the given iterator and other point to the same
-  // element in the sequence generated by the generator.
-  // Used for implementing ParamGenerator<T>::operator==().
-  virtual bool Equals(const ParamIteratorInterface& other) const = 0;
-};
-
-// Class iterating over elements provided by an implementation of
-// ParamGeneratorInterface<T>. It wraps ParamIteratorInterface<T>
-// and implements the const forward iterator concept.
-template <typename T>
-class ParamIterator {
- public:
-  typedef T value_type;
-  typedef const T& reference;
-  typedef ptrdiff_t difference_type;
-
-  // ParamIterator assumes ownership of the impl_ pointer.
-  ParamIterator(const ParamIterator& other) : impl_(other.impl_->Clone()) {}
-  ParamIterator& operator=(const ParamIterator& other) {
-    if (this != &other)
-      impl_.reset(other.impl_->Clone());
-    return *this;
-  }
-
-  const T& operator*() const { return *impl_->Current(); }
-  const T* operator->() const { return impl_->Current(); }
-  // Prefix version of operator++.
-  ParamIterator& operator++() {
-    impl_->Advance();
-    return *this;
-  }
-  // Postfix version of operator++.
-  ParamIterator operator++(int /*unused*/) {
-    ParamIteratorInterface<T>* clone = impl_->Clone();
-    impl_->Advance();
-    return ParamIterator(clone);
-  }
-  bool operator==(const ParamIterator& other) const {
-    return impl_.get() == other.impl_.get() || impl_->Equals(*other.impl_);
-  }
-  bool operator!=(const ParamIterator& other) const {
-    return !(*this == other);
-  }
-
- private:
-  friend class ParamGenerator<T>;
-  explicit ParamIterator(ParamIteratorInterface<T>* impl) : impl_(impl) {}
-  std::unique_ptr<ParamIteratorInterface<T> > impl_;
-};
-
-// ParamGeneratorInterface<T> is the binary interface to access generators
-// defined in other translation units.
-template <typename T>
-class ParamGeneratorInterface {
- public:
-  typedef T ParamType;
-
-  virtual ~ParamGeneratorInterface() {}
-
-  // Generator interface definition
-  virtual ParamIteratorInterface<T>* Begin() const = 0;
-  virtual ParamIteratorInterface<T>* End() const = 0;
-};
-
-// Wraps ParamGeneratorInterface<T> and provides general generator syntax
-// compatible with the STL Container concept.
-// This class implements copy initialization semantics and the contained
-// ParamGeneratorInterface<T> instance is shared among all copies
-// of the original object. This is possible because that instance is immutable.
-template<typename T>
-class ParamGenerator {
- public:
-  typedef ParamIterator<T> iterator;
-
-  explicit ParamGenerator(ParamGeneratorInterface<T>* impl) : impl_(impl) {}
-  ParamGenerator(const ParamGenerator& other) : impl_(other.impl_) {}
-
-  ParamGenerator& operator=(const ParamGenerator& other) {
-    impl_ = other.impl_;
-    return *this;
-  }
-
-  iterator begin() const { return iterator(impl_->Begin()); }
-  iterator end() const { return iterator(impl_->End()); }
-
- private:
-  std::shared_ptr<const ParamGeneratorInterface<T> > impl_;
-};
-
-// Generates values from a range of two comparable values. Can be used to
-// generate sequences of user-defined types that implement operator+() and
-// operator<().
-// This class is used in the Range() function.
-template <typename T, typename IncrementT>
-class RangeGenerator : public ParamGeneratorInterface<T> {
- public:
-  RangeGenerator(T begin, T end, IncrementT step)
-      : begin_(begin), end_(end),
-        step_(step), end_index_(CalculateEndIndex(begin, end, step)) {}
-  ~RangeGenerator() override {}
-
-  ParamIteratorInterface<T>* Begin() const override {
-    return new Iterator(this, begin_, 0, step_);
-  }
-  ParamIteratorInterface<T>* End() const override {
-    return new Iterator(this, end_, end_index_, step_);
-  }
-
- private:
-  class Iterator : public ParamIteratorInterface<T> {
-   public:
-    Iterator(const ParamGeneratorInterface<T>* base, T value, int index,
-             IncrementT step)
-        : base_(base), value_(value), index_(index), step_(step) {}
-    ~Iterator() override {}
-
-    const ParamGeneratorInterface<T>* BaseGenerator() const override {
-      return base_;
-    }
-    void Advance() override {
-      value_ = static_cast<T>(value_ + step_);
-      index_++;
-    }
-    ParamIteratorInterface<T>* Clone() const override {
-      return new Iterator(*this);
-    }
-    const T* Current() const override { return &value_; }
-    bool Equals(const ParamIteratorInterface<T>& other) const override {
-      // Having the same base generator guarantees that the other
-      // iterator is of the same type and we can downcast.
-      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
-          << "The program attempted to compare iterators "
-          << "from different generators." << std::endl;
-      const int other_index =
-          CheckedDowncastToActualType<const Iterator>(&other)->index_;
-      return index_ == other_index;
-    }
-
-   private:
-    Iterator(const Iterator& other)
-        : ParamIteratorInterface<T>(),
-          base_(other.base_), value_(other.value_), index_(other.index_),
-          step_(other.step_) {}
-
-    // No implementation - assignment is unsupported.
-    void operator=(const Iterator& other);
-
-    const ParamGeneratorInterface<T>* const base_;
-    T value_;
-    int index_;
-    const IncrementT step_;
-  };  // class RangeGenerator::Iterator
-
-  static int CalculateEndIndex(const T& begin,
-                               const T& end,
-                               const IncrementT& step) {
-    int end_index = 0;
-    for (T i = begin; i < end; i = static_cast<T>(i + step))
-      end_index++;
-    return end_index;
-  }
-
-  // No implementation - assignment is unsupported.
-  void operator=(const RangeGenerator& other);
-
-  const T begin_;
-  const T end_;
-  const IncrementT step_;
-  // The index for the end() iterator. All the elements in the generated
-  // sequence are indexed (0-based) to aid iterator comparison.
-  const int end_index_;
-};  // class RangeGenerator
-
-
-// Generates values from a pair of STL-style iterators. Used in the
-// ValuesIn() function. The elements are copied from the source range
-// since the source can be located on the stack, and the generator
-// is likely to persist beyond that stack frame.
-template <typename T>
-class ValuesInIteratorRangeGenerator : public ParamGeneratorInterface<T> {
- public:
-  template <typename ForwardIterator>
-  ValuesInIteratorRangeGenerator(ForwardIterator begin, ForwardIterator end)
-      : container_(begin, end) {}
-  ~ValuesInIteratorRangeGenerator() override {}
-
-  ParamIteratorInterface<T>* Begin() const override {
-    return new Iterator(this, container_.begin());
-  }
-  ParamIteratorInterface<T>* End() const override {
-    return new Iterator(this, container_.end());
-  }
-
- private:
-  typedef typename ::std::vector<T> ContainerType;
-
-  class Iterator : public ParamIteratorInterface<T> {
-   public:
-    Iterator(const ParamGeneratorInterface<T>* base,
-             typename ContainerType::const_iterator iterator)
-        : base_(base), iterator_(iterator) {}
-    ~Iterator() override {}
-
-    const ParamGeneratorInterface<T>* BaseGenerator() const override {
-      return base_;
-    }
-    void Advance() override {
-      ++iterator_;
-      value_.reset();
-    }
-    ParamIteratorInterface<T>* Clone() const override {
-      return new Iterator(*this);
-    }
-    // We need to use cached value referenced by iterator_ because *iterator_
-    // can return a temporary object (and of type other then T), so just
-    // having "return &*iterator_;" doesn't work.
-    // value_ is updated here and not in Advance() because Advance()
-    // can advance iterator_ beyond the end of the range, and we cannot
-    // detect that fact. The client code, on the other hand, is
-    // responsible for not calling Current() on an out-of-range iterator.
-    const T* Current() const override {
-      if (value_.get() == nullptr) value_.reset(new T(*iterator_));
-      return value_.get();
-    }
-    bool Equals(const ParamIteratorInterface<T>& other) const override {
-      // Having the same base generator guarantees that the other
-      // iterator is of the same type and we can downcast.
-      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
-          << "The program attempted to compare iterators "
-          << "from different generators." << std::endl;
-      return iterator_ ==
-          CheckedDowncastToActualType<const Iterator>(&other)->iterator_;
-    }
-
-   private:
-    Iterator(const Iterator& other)
-          // The explicit constructor call suppresses a false warning
-          // emitted by gcc when supplied with the -Wextra option.
-        : ParamIteratorInterface<T>(),
-          base_(other.base_),
-          iterator_(other.iterator_) {}
-
-    const ParamGeneratorInterface<T>* const base_;
-    typename ContainerType::const_iterator iterator_;
-    // A cached value of *iterator_. We keep it here to allow access by
-    // pointer in the wrapping iterator's operator->().
-    // value_ needs to be mutable to be accessed in Current().
-    // Use of std::unique_ptr helps manage cached value's lifetime,
-    // which is bound by the lifespan of the iterator itself.
-    mutable std::unique_ptr<const T> value_;
-  };  // class ValuesInIteratorRangeGenerator::Iterator
-
-  // No implementation - assignment is unsupported.
-  void operator=(const ValuesInIteratorRangeGenerator& other);
-
-  const ContainerType container_;
-};  // class ValuesInIteratorRangeGenerator
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Default parameterized test name generator, returns a string containing the
-// integer test parameter index.
-template <class ParamType>
-std::string DefaultParamName(const TestParamInfo<ParamType>& info) {
-  Message name_stream;
-  name_stream << info.index;
-  return name_stream.GetString();
-}
-
-template <typename T = int>
-void TestNotEmpty() {
-  static_assert(sizeof(T) == 0, "Empty arguments are not allowed.");
-}
-template <typename T = int>
-void TestNotEmpty(const T&) {}
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Stores a parameter value and later creates tests parameterized with that
-// value.
-template <class TestClass>
-class ParameterizedTestFactory : public TestFactoryBase {
- public:
-  typedef typename TestClass::ParamType ParamType;
-  explicit ParameterizedTestFactory(ParamType parameter) :
-      parameter_(parameter) {}
-  Test* CreateTest() override {
-    TestClass::SetParam(&parameter_);
-    return new TestClass();
-  }
-
- private:
-  const ParamType parameter_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestFactory);
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// TestMetaFactoryBase is a base class for meta-factories that create
-// test factories for passing into MakeAndRegisterTestInfo function.
-template <class ParamType>
-class TestMetaFactoryBase {
- public:
-  virtual ~TestMetaFactoryBase() {}
-
-  virtual TestFactoryBase* CreateTestFactory(ParamType parameter) = 0;
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// TestMetaFactory creates test factories for passing into
-// MakeAndRegisterTestInfo function. Since MakeAndRegisterTestInfo receives
-// ownership of test factory pointer, same factory object cannot be passed
-// into that method twice. But ParameterizedTestSuiteInfo is going to call
-// it for each Test/Parameter value combination. Thus it needs meta factory
-// creator class.
-template <class TestSuite>
-class TestMetaFactory
-    : public TestMetaFactoryBase<typename TestSuite::ParamType> {
- public:
-  using ParamType = typename TestSuite::ParamType;
-
-  TestMetaFactory() {}
-
-  TestFactoryBase* CreateTestFactory(ParamType parameter) override {
-    return new ParameterizedTestFactory<TestSuite>(parameter);
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestMetaFactory);
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// ParameterizedTestSuiteInfoBase is a generic interface
-// to ParameterizedTestSuiteInfo classes. ParameterizedTestSuiteInfoBase
-// accumulates test information provided by TEST_P macro invocations
-// and generators provided by INSTANTIATE_TEST_SUITE_P macro invocations
-// and uses that information to register all resulting test instances
-// in RegisterTests method. The ParameterizeTestSuiteRegistry class holds
-// a collection of pointers to the ParameterizedTestSuiteInfo objects
-// and calls RegisterTests() on each of them when asked.
-class ParameterizedTestSuiteInfoBase {
- public:
-  virtual ~ParameterizedTestSuiteInfoBase() {}
-
-  // Base part of test suite name for display purposes.
-  virtual const std::string& GetTestSuiteName() const = 0;
-  // Test case id to verify identity.
-  virtual TypeId GetTestSuiteTypeId() const = 0;
-  // UnitTest class invokes this method to register tests in this
-  // test suite right before running them in RUN_ALL_TESTS macro.
-  // This method should not be called more than once on any single
-  // instance of a ParameterizedTestSuiteInfoBase derived class.
-  virtual void RegisterTests() = 0;
-
- protected:
-  ParameterizedTestSuiteInfoBase() {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfoBase);
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// ParameterizedTestSuiteInfo accumulates tests obtained from TEST_P
-// macro invocations for a particular test suite and generators
-// obtained from INSTANTIATE_TEST_SUITE_P macro invocations for that
-// test suite. It registers tests with all values generated by all
-// generators when asked.
-template <class TestSuite>
-class ParameterizedTestSuiteInfo : public ParameterizedTestSuiteInfoBase {
- public:
-  // ParamType and GeneratorCreationFunc are private types but are required
-  // for declarations of public methods AddTestPattern() and
-  // AddTestSuiteInstantiation().
-  using ParamType = typename TestSuite::ParamType;
-  // A function that returns an instance of appropriate generator type.
-  typedef ParamGenerator<ParamType>(GeneratorCreationFunc)();
-  using ParamNameGeneratorFunc = std::string(const TestParamInfo<ParamType>&);
-
-  explicit ParameterizedTestSuiteInfo(const char* name,
-                                      CodeLocation code_location)
-      : test_suite_name_(name), code_location_(code_location) {}
-
-  // Test case base name for display purposes.
-  const std::string& GetTestSuiteName() const override {
-    return test_suite_name_;
-  }
-  // Test case id to verify identity.
-  TypeId GetTestSuiteTypeId() const override { return GetTypeId<TestSuite>(); }
-  // TEST_P macro uses AddTestPattern() to record information
-  // about a single test in a LocalTestInfo structure.
-  // test_suite_name is the base name of the test suite (without invocation
-  // prefix). test_base_name is the name of an individual test without
-  // parameter index. For the test SequenceA/FooTest.DoBar/1 FooTest is
-  // test suite base name and DoBar is test base name.
-  void AddTestPattern(const char* test_suite_name, const char* test_base_name,
-                      TestMetaFactoryBase<ParamType>* meta_factory) {
-    tests_.push_back(std::shared_ptr<TestInfo>(
-        new TestInfo(test_suite_name, test_base_name, meta_factory)));
-  }
-  // INSTANTIATE_TEST_SUITE_P macro uses AddGenerator() to record information
-  // about a generator.
-  int AddTestSuiteInstantiation(const std::string& instantiation_name,
-                                GeneratorCreationFunc* func,
-                                ParamNameGeneratorFunc* name_func,
-                                const char* file, int line) {
-    instantiations_.push_back(
-        InstantiationInfo(instantiation_name, func, name_func, file, line));
-    return 0;  // Return value used only to run this method in namespace scope.
-  }
-  // UnitTest class invokes this method to register tests in this test suite
-  // test suites right before running tests in RUN_ALL_TESTS macro.
-  // This method should not be called more than once on any single
-  // instance of a ParameterizedTestSuiteInfoBase derived class.
-  // UnitTest has a guard to prevent from calling this method more than once.
-  void RegisterTests() override {
-    for (typename TestInfoContainer::iterator test_it = tests_.begin();
-         test_it != tests_.end(); ++test_it) {
-      std::shared_ptr<TestInfo> test_info = *test_it;
-      for (typename InstantiationContainer::iterator gen_it =
-               instantiations_.begin(); gen_it != instantiations_.end();
-               ++gen_it) {
-        const std::string& instantiation_name = gen_it->name;
-        ParamGenerator<ParamType> generator((*gen_it->generator)());
-        ParamNameGeneratorFunc* name_func = gen_it->name_func;
-        const char* file = gen_it->file;
-        int line = gen_it->line;
-
-        std::string test_suite_name;
-        if ( !instantiation_name.empty() )
-          test_suite_name = instantiation_name + "/";
-        test_suite_name += test_info->test_suite_base_name;
-
-        size_t i = 0;
-        std::set<std::string> test_param_names;
-        for (typename ParamGenerator<ParamType>::iterator param_it =
-                 generator.begin();
-             param_it != generator.end(); ++param_it, ++i) {
-          Message test_name_stream;
-
-          std::string param_name = name_func(
-              TestParamInfo<ParamType>(*param_it, i));
-
-          GTEST_CHECK_(IsValidParamName(param_name))
-              << "Parameterized test name '" << param_name
-              << "' is invalid, in " << file
-              << " line " << line << std::endl;
-
-          GTEST_CHECK_(test_param_names.count(param_name) == 0)
-              << "Duplicate parameterized test name '" << param_name
-              << "', in " << file << " line " << line << std::endl;
-
-          test_param_names.insert(param_name);
-
-          if (!test_info->test_base_name.empty()) {
-            test_name_stream << test_info->test_base_name << "/";
-          }
-          test_name_stream << param_name;
-          MakeAndRegisterTestInfo(
-              test_suite_name.c_str(), test_name_stream.GetString().c_str(),
-              nullptr,  // No type parameter.
-              PrintToString(*param_it).c_str(), code_location_,
-              GetTestSuiteTypeId(),
-              SuiteApiResolver<TestSuite>::GetSetUpCaseOrSuite(file, line),
-              SuiteApiResolver<TestSuite>::GetTearDownCaseOrSuite(file, line),
-              test_info->test_meta_factory->CreateTestFactory(*param_it));
-        }  // for param_it
-      }  // for gen_it
-    }  // for test_it
-  }    // RegisterTests
-
- private:
-  // LocalTestInfo structure keeps information about a single test registered
-  // with TEST_P macro.
-  struct TestInfo {
-    TestInfo(const char* a_test_suite_base_name, const char* a_test_base_name,
-             TestMetaFactoryBase<ParamType>* a_test_meta_factory)
-        : test_suite_base_name(a_test_suite_base_name),
-          test_base_name(a_test_base_name),
-          test_meta_factory(a_test_meta_factory) {}
-
-    const std::string test_suite_base_name;
-    const std::string test_base_name;
-    const std::unique_ptr<TestMetaFactoryBase<ParamType> > test_meta_factory;
-  };
-  using TestInfoContainer = ::std::vector<std::shared_ptr<TestInfo> >;
-  // Records data received from INSTANTIATE_TEST_SUITE_P macros:
-  //  <Instantiation name, Sequence generator creation function,
-  //     Name generator function, Source file, Source line>
-  struct InstantiationInfo {
-      InstantiationInfo(const std::string &name_in,
-                        GeneratorCreationFunc* generator_in,
-                        ParamNameGeneratorFunc* name_func_in,
-                        const char* file_in,
-                        int line_in)
-          : name(name_in),
-            generator(generator_in),
-            name_func(name_func_in),
-            file(file_in),
-            line(line_in) {}
-
-      std::string name;
-      GeneratorCreationFunc* generator;
-      ParamNameGeneratorFunc* name_func;
-      const char* file;
-      int line;
-  };
-  typedef ::std::vector<InstantiationInfo> InstantiationContainer;
-
-  static bool IsValidParamName(const std::string& name) {
-    // Check for empty string
-    if (name.empty())
-      return false;
-
-    // Check for invalid characters
-    for (std::string::size_type index = 0; index < name.size(); ++index) {
-      if (!isalnum(name[index]) && name[index] != '_')
-        return false;
-    }
-
-    return true;
-  }
-
-  const std::string test_suite_name_;
-  CodeLocation code_location_;
-  TestInfoContainer tests_;
-  InstantiationContainer instantiations_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfo);
-};  // class ParameterizedTestSuiteInfo
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-template <class TestCase>
-using ParameterizedTestCaseInfo = ParameterizedTestSuiteInfo<TestCase>;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// ParameterizedTestSuiteRegistry contains a map of
-// ParameterizedTestSuiteInfoBase classes accessed by test suite names. TEST_P
-// and INSTANTIATE_TEST_SUITE_P macros use it to locate their corresponding
-// ParameterizedTestSuiteInfo descriptors.
-class ParameterizedTestSuiteRegistry {
- public:
-  ParameterizedTestSuiteRegistry() {}
-  ~ParameterizedTestSuiteRegistry() {
-    for (auto& test_suite_info : test_suite_infos_) {
-      delete test_suite_info;
-    }
-  }
-
-  // Looks up or creates and returns a structure containing information about
-  // tests and instantiations of a particular test suite.
-  template <class TestSuite>
-  ParameterizedTestSuiteInfo<TestSuite>* GetTestSuitePatternHolder(
-      const char* test_suite_name, CodeLocation code_location) {
-    ParameterizedTestSuiteInfo<TestSuite>* typed_test_info = nullptr;
-    for (auto& test_suite_info : test_suite_infos_) {
-      if (test_suite_info->GetTestSuiteName() == test_suite_name) {
-        if (test_suite_info->GetTestSuiteTypeId() != GetTypeId<TestSuite>()) {
-          // Complain about incorrect usage of Google Test facilities
-          // and terminate the program since we cannot guaranty correct
-          // test suite setup and tear-down in this case.
-          ReportInvalidTestSuiteType(test_suite_name, code_location);
-          posix::Abort();
-        } else {
-          // At this point we are sure that the object we found is of the same
-          // type we are looking for, so we downcast it to that type
-          // without further checks.
-          typed_test_info = CheckedDowncastToActualType<
-              ParameterizedTestSuiteInfo<TestSuite> >(test_suite_info);
-        }
-        break;
-      }
-    }
-    if (typed_test_info == nullptr) {
-      typed_test_info = new ParameterizedTestSuiteInfo<TestSuite>(
-          test_suite_name, code_location);
-      test_suite_infos_.push_back(typed_test_info);
-    }
-    return typed_test_info;
-  }
-  void RegisterTests() {
-    for (auto& test_suite_info : test_suite_infos_) {
-      test_suite_info->RegisterTests();
-    }
-  }
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  template <class TestCase>
-  ParameterizedTestCaseInfo<TestCase>* GetTestCasePatternHolder(
-      const char* test_case_name, CodeLocation code_location) {
-    return GetTestSuitePatternHolder<TestCase>(test_case_name, code_location);
-  }
-
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
- private:
-  using TestSuiteInfoContainer = ::std::vector<ParameterizedTestSuiteInfoBase*>;
-
-  TestSuiteInfoContainer test_suite_infos_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteRegistry);
-};
-
-}  // namespace internal
-
-// Forward declarations of ValuesIn(), which is implemented in
-// include/gtest/gtest-param-test.h.
-template <class Container>
-internal::ParamGenerator<typename Container::value_type> ValuesIn(
-    const Container& container);
-
-namespace internal {
-// Used in the Values() function to provide polymorphic capabilities.
-
-template <typename... Ts>
-class ValueArray {
- public:
-  ValueArray(Ts... v) : v_{std::move(v)...} {}
-
-  template <typename T>
-  operator ParamGenerator<T>() const {  // NOLINT
-    return ValuesIn(MakeVector<T>(MakeIndexSequence<sizeof...(Ts)>()));
-  }
-
- private:
-  template <typename T, size_t... I>
-  std::vector<T> MakeVector(IndexSequence<I...>) const {
-    return std::vector<T>{static_cast<T>(v_.template Get<I>())...};
-  }
-
-  FlatTuple<Ts...> v_;
-};
-
-template <typename... T>
-class CartesianProductGenerator
-    : public ParamGeneratorInterface<::std::tuple<T...>> {
- public:
-  typedef ::std::tuple<T...> ParamType;
-
-  CartesianProductGenerator(const std::tuple<ParamGenerator<T>...>& g)
-      : generators_(g) {}
-  ~CartesianProductGenerator() override {}
-
-  ParamIteratorInterface<ParamType>* Begin() const override {
-    return new Iterator(this, generators_, false);
-  }
-  ParamIteratorInterface<ParamType>* End() const override {
-    return new Iterator(this, generators_, true);
-  }
-
- private:
-  template <class I>
-  class IteratorImpl;
-  template <size_t... I>
-  class IteratorImpl<IndexSequence<I...>>
-      : public ParamIteratorInterface<ParamType> {
-   public:
-    IteratorImpl(const ParamGeneratorInterface<ParamType>* base,
-             const std::tuple<ParamGenerator<T>...>& generators, bool is_end)
-        : base_(base),
-          begin_(std::get<I>(generators).begin()...),
-          end_(std::get<I>(generators).end()...),
-          current_(is_end ? end_ : begin_) {
-      ComputeCurrentValue();
-    }
-    ~IteratorImpl() override {}
-
-    const ParamGeneratorInterface<ParamType>* BaseGenerator() const override {
-      return base_;
-    }
-    // Advance should not be called on beyond-of-range iterators
-    // so no component iterators must be beyond end of range, either.
-    void Advance() override {
-      assert(!AtEnd());
-      // Advance the last iterator.
-      ++std::get<sizeof...(T) - 1>(current_);
-      // if that reaches end, propagate that up.
-      AdvanceIfEnd<sizeof...(T) - 1>();
-      ComputeCurrentValue();
-    }
-    ParamIteratorInterface<ParamType>* Clone() const override {
-      return new IteratorImpl(*this);
-    }
-
-    const ParamType* Current() const override { return current_value_.get(); }
-
-    bool Equals(const ParamIteratorInterface<ParamType>& other) const override {
-      // Having the same base generator guarantees that the other
-      // iterator is of the same type and we can downcast.
-      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
-          << "The program attempted to compare iterators "
-          << "from different generators." << std::endl;
-      const IteratorImpl* typed_other =
-          CheckedDowncastToActualType<const IteratorImpl>(&other);
-
-      // We must report iterators equal if they both point beyond their
-      // respective ranges. That can happen in a variety of fashions,
-      // so we have to consult AtEnd().
-      if (AtEnd() && typed_other->AtEnd()) return true;
-
-      bool same = true;
-      bool dummy[] = {
-          (same = same && std::get<I>(current_) ==
-                              std::get<I>(typed_other->current_))...};
-      (void)dummy;
-      return same;
-    }
-
-   private:
-    template <size_t ThisI>
-    void AdvanceIfEnd() {
-      if (std::get<ThisI>(current_) != std::get<ThisI>(end_)) return;
-
-      bool last = ThisI == 0;
-      if (last) {
-        // We are done. Nothing else to propagate.
-        return;
-      }
-
-      constexpr size_t NextI = ThisI - (ThisI != 0);
-      std::get<ThisI>(current_) = std::get<ThisI>(begin_);
-      ++std::get<NextI>(current_);
-      AdvanceIfEnd<NextI>();
-    }
-
-    void ComputeCurrentValue() {
-      if (!AtEnd())
-        current_value_ = std::make_shared<ParamType>(*std::get<I>(current_)...);
-    }
-    bool AtEnd() const {
-      bool at_end = false;
-      bool dummy[] = {
-          (at_end = at_end || std::get<I>(current_) == std::get<I>(end_))...};
-      (void)dummy;
-      return at_end;
-    }
-
-    const ParamGeneratorInterface<ParamType>* const base_;
-    std::tuple<typename ParamGenerator<T>::iterator...> begin_;
-    std::tuple<typename ParamGenerator<T>::iterator...> end_;
-    std::tuple<typename ParamGenerator<T>::iterator...> current_;
-    std::shared_ptr<ParamType> current_value_;
-  };
-
-  using Iterator = IteratorImpl<typename MakeIndexSequence<sizeof...(T)>::type>;
-
-  std::tuple<ParamGenerator<T>...> generators_;
-};
-
-template <class... Gen>
-class CartesianProductHolder {
- public:
-  CartesianProductHolder(const Gen&... g) : generators_(g...) {}
-  template <typename... T>
-  operator ParamGenerator<::std::tuple<T...>>() const {
-    return ParamGenerator<::std::tuple<T...>>(
-        new CartesianProductGenerator<T...>(generators_));
-  }
-
- private:
-  std::tuple<Gen...> generators_;
-};
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-port-arch.h b/3rdparty/gtest/include/gtest/internal/gtest-port-arch.h
deleted file mode 100644
index cece93db..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-port-arch.h
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the GTEST_OS_* macro.
-// It is separate from gtest-port.h so that custom/gtest-port.h can include it.
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
-
-// Determines the platform on which Google Test is compiled.
-#ifdef __CYGWIN__
-# define GTEST_OS_CYGWIN 1
-# elif defined(__MINGW__) || defined(__MINGW32__) || defined(__MINGW64__)
-#  define GTEST_OS_WINDOWS_MINGW 1
-#  define GTEST_OS_WINDOWS 1
-#elif defined _WIN32
-# define GTEST_OS_WINDOWS 1
-# ifdef _WIN32_WCE
-#  define GTEST_OS_WINDOWS_MOBILE 1
-# elif defined(WINAPI_FAMILY)
-#  include <winapifamily.h>
-#  if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
-#   define GTEST_OS_WINDOWS_DESKTOP 1
-#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE_APP)
-#   define GTEST_OS_WINDOWS_PHONE 1
-#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
-#   define GTEST_OS_WINDOWS_RT 1
-#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_TV_TITLE)
-#   define GTEST_OS_WINDOWS_PHONE 1
-#   define GTEST_OS_WINDOWS_TV_TITLE 1
-#  else
-    // WINAPI_FAMILY defined but no known partition matched.
-    // Default to desktop.
-#   define GTEST_OS_WINDOWS_DESKTOP 1
-#  endif
-# else
-#  define GTEST_OS_WINDOWS_DESKTOP 1
-# endif  // _WIN32_WCE
-#elif defined __OS2__
-# define GTEST_OS_OS2 1
-#elif defined __APPLE__
-# define GTEST_OS_MAC 1
-# if TARGET_OS_IPHONE
-#  define GTEST_OS_IOS 1
-# endif
-#elif defined __DragonFly__
-# define GTEST_OS_DRAGONFLY 1
-#elif defined __FreeBSD__
-# define GTEST_OS_FREEBSD 1
-#elif defined __Fuchsia__
-# define GTEST_OS_FUCHSIA 1
-#elif defined(__GLIBC__) && defined(__FreeBSD_kernel__)
-# define GTEST_OS_GNU_KFREEBSD 1
-#elif defined __linux__
-# define GTEST_OS_LINUX 1
-# if defined __ANDROID__
-#  define GTEST_OS_LINUX_ANDROID 1
-# endif
-#elif defined __MVS__
-# define GTEST_OS_ZOS 1
-#elif defined(__sun) && defined(__SVR4)
-# define GTEST_OS_SOLARIS 1
-#elif defined(_AIX)
-# define GTEST_OS_AIX 1
-#elif defined(__hpux)
-# define GTEST_OS_HPUX 1
-#elif defined __native_client__
-# define GTEST_OS_NACL 1
-#elif defined __NetBSD__
-# define GTEST_OS_NETBSD 1
-#elif defined __OpenBSD__
-# define GTEST_OS_OPENBSD 1
-#elif defined __QNX__
-# define GTEST_OS_QNX 1
-#elif defined(__HAIKU__)
-#define GTEST_OS_HAIKU 1
-#endif  // __CYGWIN__
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-port.h b/3rdparty/gtest/include/gtest/internal/gtest-port.h
deleted file mode 100644
index 063fcb10..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-port.h
+++ /dev/null
@@ -1,2231 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Low-level types and utilities for porting Google Test to various
-// platforms.  All macros ending with _ and symbols defined in an
-// internal namespace are subject to change without notice.  Code
-// outside Google Test MUST NOT USE THEM DIRECTLY.  Macros that don't
-// end with _ are part of Google Test's public API and can be used by
-// code outside Google Test.
-//
-// This file is fundamental to Google Test.  All other Google Test source
-// files are expected to #include this.  Therefore, it cannot #include
-// any other Google Test header.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
-
-// Environment-describing macros
-// -----------------------------
-//
-// Google Test can be used in many different environments.  Macros in
-// this section tell Google Test what kind of environment it is being
-// used in, such that Google Test can provide environment-specific
-// features and implementations.
-//
-// Google Test tries to automatically detect the properties of its
-// environment, so users usually don't need to worry about these
-// macros.  However, the automatic detection is not perfect.
-// Sometimes it's necessary for a user to define some of the following
-// macros in the build script to override Google Test's decisions.
-//
-// If the user doesn't define a macro in the list, Google Test will
-// provide a default definition.  After this header is #included, all
-// macros in this list will be defined to either 1 or 0.
-//
-// Notes to maintainers:
-//   - Each macro here is a user-tweakable knob; do not grow the list
-//     lightly.
-//   - Use #if to key off these macros.  Don't use #ifdef or "#if
-//     defined(...)", which will not work as these macros are ALWAYS
-//     defined.
-//
-//   GTEST_HAS_CLONE          - Define it to 1/0 to indicate that clone(2)
-//                              is/isn't available.
-//   GTEST_HAS_EXCEPTIONS     - Define it to 1/0 to indicate that exceptions
-//                              are enabled.
-//   GTEST_HAS_POSIX_RE       - Define it to 1/0 to indicate that POSIX regular
-//                              expressions are/aren't available.
-//   GTEST_HAS_PTHREAD        - Define it to 1/0 to indicate that <pthread.h>
-//                              is/isn't available.
-//   GTEST_HAS_RTTI           - Define it to 1/0 to indicate that RTTI is/isn't
-//                              enabled.
-//   GTEST_HAS_STD_WSTRING    - Define it to 1/0 to indicate that
-//                              std::wstring does/doesn't work (Google Test can
-//                              be used where std::wstring is unavailable).
-//   GTEST_HAS_SEH            - Define it to 1/0 to indicate whether the
-//                              compiler supports Microsoft's "Structured
-//                              Exception Handling".
-//   GTEST_HAS_STREAM_REDIRECTION
-//                            - Define it to 1/0 to indicate whether the
-//                              platform supports I/O stream redirection using
-//                              dup() and dup2().
-//   GTEST_LINKED_AS_SHARED_LIBRARY
-//                            - Define to 1 when compiling tests that use
-//                              Google Test as a shared library (known as
-//                              DLL on Windows).
-//   GTEST_CREATE_SHARED_LIBRARY
-//                            - Define to 1 when compiling Google Test itself
-//                              as a shared library.
-//   GTEST_DEFAULT_DEATH_TEST_STYLE
-//                            - The default value of --gtest_death_test_style.
-//                              The legacy default has been "fast" in the open
-//                              source version since 2008. The recommended value
-//                              is "threadsafe", and can be set in
-//                              custom/gtest-port.h.
-
-// Platform-indicating macros
-// --------------------------
-//
-// Macros indicating the platform on which Google Test is being used
-// (a macro is defined to 1 if compiled on the given platform;
-// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
-// defines these macros automatically.  Code outside Google Test MUST
-// NOT define them.
-//
-//   GTEST_OS_AIX      - IBM AIX
-//   GTEST_OS_CYGWIN   - Cygwin
-//   GTEST_OS_DRAGONFLY - DragonFlyBSD
-//   GTEST_OS_FREEBSD  - FreeBSD
-//   GTEST_OS_FUCHSIA  - Fuchsia
-//   GTEST_OS_GNU_KFREEBSD - GNU/kFreeBSD
-//   GTEST_OS_HAIKU    - Haiku
-//   GTEST_OS_HPUX     - HP-UX
-//   GTEST_OS_LINUX    - Linux
-//     GTEST_OS_LINUX_ANDROID - Google Android
-//   GTEST_OS_MAC      - Mac OS X
-//     GTEST_OS_IOS    - iOS
-//   GTEST_OS_NACL     - Google Native Client (NaCl)
-//   GTEST_OS_NETBSD   - NetBSD
-//   GTEST_OS_OPENBSD  - OpenBSD
-//   GTEST_OS_OS2      - OS/2
-//   GTEST_OS_QNX      - QNX
-//   GTEST_OS_SOLARIS  - Sun Solaris
-//   GTEST_OS_WINDOWS  - Windows (Desktop, MinGW, or Mobile)
-//     GTEST_OS_WINDOWS_DESKTOP  - Windows Desktop
-//     GTEST_OS_WINDOWS_MINGW    - MinGW
-//     GTEST_OS_WINDOWS_MOBILE   - Windows Mobile
-//     GTEST_OS_WINDOWS_PHONE    - Windows Phone
-//     GTEST_OS_WINDOWS_RT       - Windows Store App/WinRT
-//   GTEST_OS_ZOS      - z/OS
-//
-// Among the platforms, Cygwin, Linux, Mac OS X, and Windows have the
-// most stable support.  Since core members of the Google Test project
-// don't have access to other platforms, support for them may be less
-// stable.  If you notice any problems on your platform, please notify
-// googletestframework@googlegroups.com (patches for fixing them are
-// even more welcome!).
-//
-// It is possible that none of the GTEST_OS_* macros are defined.
-
-// Feature-indicating macros
-// -------------------------
-//
-// Macros indicating which Google Test features are available (a macro
-// is defined to 1 if the corresponding feature is supported;
-// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
-// defines these macros automatically.  Code outside Google Test MUST
-// NOT define them.
-//
-// These macros are public so that portable tests can be written.
-// Such tests typically surround code using a feature with an #if
-// which controls that code.  For example:
-//
-// #if GTEST_HAS_DEATH_TEST
-//   EXPECT_DEATH(DoSomethingDeadly());
-// #endif
-//
-//   GTEST_HAS_DEATH_TEST   - death tests
-//   GTEST_HAS_TYPED_TEST   - typed tests
-//   GTEST_HAS_TYPED_TEST_P - type-parameterized tests
-//   GTEST_IS_THREADSAFE    - Google Test is thread-safe.
-//   GOOGLETEST_CM0007 DO NOT DELETE
-//   GTEST_USES_POSIX_RE    - enhanced POSIX regex is used. Do not confuse with
-//                            GTEST_HAS_POSIX_RE (see above) which users can
-//                            define themselves.
-//   GTEST_USES_SIMPLE_RE   - our own simple regex is used;
-//                            the above RE\b(s) are mutually exclusive.
-
-// Misc public macros
-// ------------------
-//
-//   GTEST_FLAG(flag_name)  - references the variable corresponding to
-//                            the given Google Test flag.
-
-// Internal utilities
-// ------------------
-//
-// The following macros and utilities are for Google Test's INTERNAL
-// use only.  Code outside Google Test MUST NOT USE THEM DIRECTLY.
-//
-// Macros for basic C++ coding:
-//   GTEST_AMBIGUOUS_ELSE_BLOCKER_ - for disabling a gcc warning.
-//   GTEST_ATTRIBUTE_UNUSED_  - declares that a class' instances or a
-//                              variable don't have to be used.
-//   GTEST_DISALLOW_ASSIGN_   - disables operator=.
-//   GTEST_DISALLOW_COPY_AND_ASSIGN_ - disables copy ctor and operator=.
-//   GTEST_MUST_USE_RESULT_   - declares that a function's result must be used.
-//   GTEST_INTENTIONAL_CONST_COND_PUSH_ - start code section where MSVC C4127 is
-//                                        suppressed (constant conditional).
-//   GTEST_INTENTIONAL_CONST_COND_POP_  - finish code section where MSVC C4127
-//                                        is suppressed.
-//
-// Synchronization:
-//   Mutex, MutexLock, ThreadLocal, GetThreadCount()
-//                            - synchronization primitives.
-//
-// Regular expressions:
-//   RE             - a simple regular expression class using the POSIX
-//                    Extended Regular Expression syntax on UNIX-like platforms
-//                    GOOGLETEST_CM0008 DO NOT DELETE
-//                    or a reduced regular exception syntax on other
-//                    platforms, including Windows.
-// Logging:
-//   GTEST_LOG_()   - logs messages at the specified severity level.
-//   LogToStderr()  - directs all log messages to stderr.
-//   FlushInfoLog() - flushes informational log messages.
-//
-// Stdout and stderr capturing:
-//   CaptureStdout()     - starts capturing stdout.
-//   GetCapturedStdout() - stops capturing stdout and returns the captured
-//                         string.
-//   CaptureStderr()     - starts capturing stderr.
-//   GetCapturedStderr() - stops capturing stderr and returns the captured
-//                         string.
-//
-// Integer types:
-//   TypeWithSize   - maps an integer to a int type.
-//   Int32, UInt32, Int64, UInt64, TimeInMillis
-//                  - integers of known sizes.
-//   BiggestInt     - the biggest signed integer type.
-//
-// Command-line utilities:
-//   GTEST_DECLARE_*()  - declares a flag.
-//   GTEST_DEFINE_*()   - defines a flag.
-//   GetInjectableArgvs() - returns the command line as a vector of strings.
-//
-// Environment variable utilities:
-//   GetEnv()             - gets the value of an environment variable.
-//   BoolFromGTestEnv()   - parses a bool environment variable.
-//   Int32FromGTestEnv()  - parses an Int32 environment variable.
-//   StringFromGTestEnv() - parses a string environment variable.
-//
-// Deprecation warnings:
-//   GTEST_INTERNAL_DEPRECATED(message) - attribute marking a function as
-//                                        deprecated; calling a marked function
-//                                        should generate a compiler warning
-
-#include <ctype.h>   // for isspace, etc
-#include <stddef.h>  // for ptrdiff_t
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <memory>
-#include <type_traits>
-
-#ifndef _WIN32_WCE
-# include <sys/types.h>
-# include <sys/stat.h>
-#endif  // !_WIN32_WCE
-
-#if defined __APPLE__
-# include <AvailabilityMacros.h>
-# include <TargetConditionals.h>
-#endif
-
-#include <algorithm>  // NOLINT
-#include <iostream>   // NOLINT
-#include <sstream>    // NOLINT
-#include <string>     // NOLINT
-#include <tuple>
-#include <utility>
-#include <vector>  // NOLINT
-
-#include "gtest/internal/gtest-port-arch.h"
-#include "gtest/internal/custom/gtest-port.h"
-
-#if !defined(GTEST_DEV_EMAIL_)
-# define GTEST_DEV_EMAIL_ "googletestframework@@googlegroups.com"
-# define GTEST_FLAG_PREFIX_ "gtest_"
-# define GTEST_FLAG_PREFIX_DASH_ "gtest-"
-# define GTEST_FLAG_PREFIX_UPPER_ "GTEST_"
-# define GTEST_NAME_ "Google Test"
-# define GTEST_PROJECT_URL_ "https://github.com/google/googletest/"
-#endif  // !defined(GTEST_DEV_EMAIL_)
-
-#if !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
-# define GTEST_INIT_GOOGLE_TEST_NAME_ "testing::InitGoogleTest"
-#endif  // !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
-
-// Determines the version of gcc that is used to compile this.
-#ifdef __GNUC__
-// 40302 means version 4.3.2.
-# define GTEST_GCC_VER_ \
-    (__GNUC__*10000 + __GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__)
-#endif  // __GNUC__
-
-// Macros for disabling Microsoft Visual C++ warnings.
-//
-//   GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 4385)
-//   /* code that triggers warnings C4800 and C4385 */
-//   GTEST_DISABLE_MSC_WARNINGS_POP_()
-#if defined(_MSC_VER)
-# define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings) \
-    __pragma(warning(push))                        \
-    __pragma(warning(disable: warnings))
-# define GTEST_DISABLE_MSC_WARNINGS_POP_()          \
-    __pragma(warning(pop))
-#else
-// Not all compilers are MSVC
-# define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings)
-# define GTEST_DISABLE_MSC_WARNINGS_POP_()
-#endif
-
-// Clang on Windows does not understand MSVC's pragma warning.
-// We need clang-specific way to disable function deprecation warning.
-#ifdef __clang__
-# define GTEST_DISABLE_MSC_DEPRECATED_PUSH_()                         \
-    _Pragma("clang diagnostic push")                                  \
-    _Pragma("clang diagnostic ignored \"-Wdeprecated-declarations\"") \
-    _Pragma("clang diagnostic ignored \"-Wdeprecated-implementations\"")
-#define GTEST_DISABLE_MSC_DEPRECATED_POP_() \
-    _Pragma("clang diagnostic pop")
-#else
-# define GTEST_DISABLE_MSC_DEPRECATED_PUSH_() \
-    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4996)
-# define GTEST_DISABLE_MSC_DEPRECATED_POP_() \
-    GTEST_DISABLE_MSC_WARNINGS_POP_()
-#endif
-
-// Brings in definitions for functions used in the testing::internal::posix
-// namespace (read, write, close, chdir, isatty, stat). We do not currently
-// use them on Windows Mobile.
-#if GTEST_OS_WINDOWS
-# if !GTEST_OS_WINDOWS_MOBILE
-#  include <direct.h>
-#  include <io.h>
-# endif
-// In order to avoid having to include <windows.h>, use forward declaration
-#if GTEST_OS_WINDOWS_MINGW && !defined(__MINGW64_VERSION_MAJOR)
-// MinGW defined _CRITICAL_SECTION and _RTL_CRITICAL_SECTION as two
-// separate (equivalent) structs, instead of using typedef
-typedef struct _CRITICAL_SECTION GTEST_CRITICAL_SECTION;
-#else
-// Assume CRITICAL_SECTION is a typedef of _RTL_CRITICAL_SECTION.
-// This assumption is verified by
-// WindowsTypesTest.CRITICAL_SECTIONIs_RTL_CRITICAL_SECTION.
-typedef struct _RTL_CRITICAL_SECTION GTEST_CRITICAL_SECTION;
-#endif
-#else
-// This assumes that non-Windows OSes provide unistd.h. For OSes where this
-// is not the case, we need to include headers that provide the functions
-// mentioned above.
-# include <unistd.h>
-# include <strings.h>
-#endif  // GTEST_OS_WINDOWS
-
-#if GTEST_OS_LINUX_ANDROID
-// Used to define __ANDROID_API__ matching the target NDK API level.
-#  include <android/api-level.h>  // NOLINT
-#endif
-
-// Defines this to true if and only if Google Test can use POSIX regular
-// expressions.
-#ifndef GTEST_HAS_POSIX_RE
-# if GTEST_OS_LINUX_ANDROID
-// On Android, <regex.h> is only available starting with Gingerbread.
-#  define GTEST_HAS_POSIX_RE (__ANDROID_API__ >= 9)
-# else
-#  define GTEST_HAS_POSIX_RE (!GTEST_OS_WINDOWS)
-# endif
-#endif
-
-#if GTEST_USES_PCRE
-// The appropriate headers have already been included.
-
-#elif GTEST_HAS_POSIX_RE
-
-// On some platforms, <regex.h> needs someone to define size_t, and
-// won't compile otherwise.  We can #include it here as we already
-// included <stdlib.h>, which is guaranteed to define size_t through
-// <stddef.h>.
-# include <regex.h>  // NOLINT
-
-# define GTEST_USES_POSIX_RE 1
-
-#elif GTEST_OS_WINDOWS
-
-// <regex.h> is not available on Windows.  Use our own simple regex
-// implementation instead.
-# define GTEST_USES_SIMPLE_RE 1
-
-#else
-
-// <regex.h> may not be available on this platform.  Use our own
-// simple regex implementation instead.
-# define GTEST_USES_SIMPLE_RE 1
-
-#endif  // GTEST_USES_PCRE
-
-#ifndef GTEST_HAS_EXCEPTIONS
-// The user didn't tell us whether exceptions are enabled, so we need
-// to figure it out.
-# if defined(_MSC_VER) && defined(_CPPUNWIND)
-// MSVC defines _CPPUNWIND to 1 if and only if exceptions are enabled.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__BORLANDC__)
-// C++Builder's implementation of the STL uses the _HAS_EXCEPTIONS
-// macro to enable exceptions, so we'll do the same.
-// Assumes that exceptions are enabled by default.
-#  ifndef _HAS_EXCEPTIONS
-#   define _HAS_EXCEPTIONS 1
-#  endif  // _HAS_EXCEPTIONS
-#  define GTEST_HAS_EXCEPTIONS _HAS_EXCEPTIONS
-# elif defined(__clang__)
-// clang defines __EXCEPTIONS if and only if exceptions are enabled before clang
-// 220714, but if and only if cleanups are enabled after that. In Obj-C++ files,
-// there can be cleanups for ObjC exceptions which also need cleanups, even if
-// C++ exceptions are disabled. clang has __has_feature(cxx_exceptions) which
-// checks for C++ exceptions starting at clang r206352, but which checked for
-// cleanups prior to that. To reliably check for C++ exception availability with
-// clang, check for
-// __EXCEPTIONS && __has_feature(cxx_exceptions).
-#  define GTEST_HAS_EXCEPTIONS (__EXCEPTIONS && __has_feature(cxx_exceptions))
-# elif defined(__GNUC__) && __EXCEPTIONS
-// gcc defines __EXCEPTIONS to 1 if and only if exceptions are enabled.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__SUNPRO_CC)
-// Sun Pro CC supports exceptions.  However, there is no compile-time way of
-// detecting whether they are enabled or not.  Therefore, we assume that
-// they are enabled unless the user tells us otherwise.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__IBMCPP__) && __EXCEPTIONS
-// xlC defines __EXCEPTIONS to 1 if and only if exceptions are enabled.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__HP_aCC)
-// Exception handling is in effect by default in HP aCC compiler. It has to
-// be turned of by +noeh compiler option if desired.
-#  define GTEST_HAS_EXCEPTIONS 1
-# else
-// For other compilers, we assume exceptions are disabled to be
-// conservative.
-#  define GTEST_HAS_EXCEPTIONS 0
-# endif  // defined(_MSC_VER) || defined(__BORLANDC__)
-#endif  // GTEST_HAS_EXCEPTIONS
-
-#if !defined(GTEST_HAS_STD_STRING)
-// Even though we don't use this macro any longer, we keep it in case
-// some clients still depend on it.
-# define GTEST_HAS_STD_STRING 1
-#elif !GTEST_HAS_STD_STRING
-// The user told us that ::std::string isn't available.
-# error "::std::string isn't available."
-#endif  // !defined(GTEST_HAS_STD_STRING)
-
-#ifndef GTEST_HAS_STD_WSTRING
-// The user didn't tell us whether ::std::wstring is available, so we need
-// to figure it out.
-// Cygwin 1.7 and below doesn't support ::std::wstring.
-// Solaris' libc++ doesn't support it either.  Android has
-// no support for it at least as recent as Froyo (2.2).
-#define GTEST_HAS_STD_WSTRING                                         \
-  (!(GTEST_OS_LINUX_ANDROID || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS || \
-     GTEST_OS_HAIKU))
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Determines whether RTTI is available.
-#ifndef GTEST_HAS_RTTI
-// The user didn't tell us whether RTTI is enabled, so we need to
-// figure it out.
-
-# ifdef _MSC_VER
-
-#ifdef _CPPRTTI  // MSVC defines this macro if and only if RTTI is enabled.
-#   define GTEST_HAS_RTTI 1
-#  else
-#   define GTEST_HAS_RTTI 0
-#  endif
-
-// Starting with version 4.3.2, gcc defines __GXX_RTTI if and only if RTTI is
-// enabled.
-# elif defined(__GNUC__)
-
-#  ifdef __GXX_RTTI
-// When building against STLport with the Android NDK and with
-// -frtti -fno-exceptions, the build fails at link time with undefined
-// references to __cxa_bad_typeid. Note sure if STL or toolchain bug,
-// so disable RTTI when detected.
-#   if GTEST_OS_LINUX_ANDROID && defined(_STLPORT_MAJOR) && \
-       !defined(__EXCEPTIONS)
-#    define GTEST_HAS_RTTI 0
-#   else
-#    define GTEST_HAS_RTTI 1
-#   endif  // GTEST_OS_LINUX_ANDROID && __STLPORT_MAJOR && !__EXCEPTIONS
-#  else
-#   define GTEST_HAS_RTTI 0
-#  endif  // __GXX_RTTI
-
-// Clang defines __GXX_RTTI starting with version 3.0, but its manual recommends
-// using has_feature instead. has_feature(cxx_rtti) is supported since 2.7, the
-// first version with C++ support.
-# elif defined(__clang__)
-
-#  define GTEST_HAS_RTTI __has_feature(cxx_rtti)
-
-// Starting with version 9.0 IBM Visual Age defines __RTTI_ALL__ to 1 if
-// both the typeid and dynamic_cast features are present.
-# elif defined(__IBMCPP__) && (__IBMCPP__ >= 900)
-
-#  ifdef __RTTI_ALL__
-#   define GTEST_HAS_RTTI 1
-#  else
-#   define GTEST_HAS_RTTI 0
-#  endif
-
-# else
-
-// For all other compilers, we assume RTTI is enabled.
-#  define GTEST_HAS_RTTI 1
-
-# endif  // _MSC_VER
-
-#endif  // GTEST_HAS_RTTI
-
-// It's this header's responsibility to #include <typeinfo> when RTTI
-// is enabled.
-#if GTEST_HAS_RTTI
-# include <typeinfo>
-#endif
-
-// Determines whether Google Test can use the pthreads library.
-#ifndef GTEST_HAS_PTHREAD
-// The user didn't tell us explicitly, so we make reasonable assumptions about
-// which platforms have pthreads support.
-//
-// To disable threading support in Google Test, add -DGTEST_HAS_PTHREAD=0
-// to your compiler flags.
-#define GTEST_HAS_PTHREAD                                                      \
-  (GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_HPUX || GTEST_OS_QNX ||          \
-   GTEST_OS_FREEBSD || GTEST_OS_NACL || GTEST_OS_NETBSD || GTEST_OS_FUCHSIA || \
-   GTEST_OS_DRAGONFLY || GTEST_OS_GNU_KFREEBSD || GTEST_OS_OPENBSD ||          \
-   GTEST_OS_HAIKU)
-#endif  // GTEST_HAS_PTHREAD
-
-#if GTEST_HAS_PTHREAD
-// gtest-port.h guarantees to #include <pthread.h> when GTEST_HAS_PTHREAD is
-// true.
-# include <pthread.h>  // NOLINT
-
-// For timespec and nanosleep, used below.
-# include <time.h>  // NOLINT
-#endif
-
-// Determines whether clone(2) is supported.
-// Usually it will only be available on Linux, excluding
-// Linux on the Itanium architecture.
-// Also see http://linux.die.net/man/2/clone.
-#ifndef GTEST_HAS_CLONE
-// The user didn't tell us, so we need to figure it out.
-
-# if GTEST_OS_LINUX && !defined(__ia64__)
-#  if GTEST_OS_LINUX_ANDROID
-// On Android, clone() became available at different API levels for each 32-bit
-// architecture.
-#    if defined(__LP64__) || \
-        (defined(__arm__) && __ANDROID_API__ >= 9) || \
-        (defined(__mips__) && __ANDROID_API__ >= 12) || \
-        (defined(__i386__) && __ANDROID_API__ >= 17)
-#     define GTEST_HAS_CLONE 1
-#    else
-#     define GTEST_HAS_CLONE 0
-#    endif
-#  else
-#   define GTEST_HAS_CLONE 1
-#  endif
-# else
-#  define GTEST_HAS_CLONE 0
-# endif  // GTEST_OS_LINUX && !defined(__ia64__)
-
-#endif  // GTEST_HAS_CLONE
-
-// Determines whether to support stream redirection. This is used to test
-// output correctness and to implement death tests.
-#ifndef GTEST_HAS_STREAM_REDIRECTION
-// By default, we assume that stream redirection is supported on all
-// platforms except known mobile ones.
-# if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE || GTEST_OS_WINDOWS_RT
-#  define GTEST_HAS_STREAM_REDIRECTION 0
-# else
-#  define GTEST_HAS_STREAM_REDIRECTION 1
-# endif  // !GTEST_OS_WINDOWS_MOBILE
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-// Determines whether to support death tests.
-// pops up a dialog window that cannot be suppressed programmatically.
-#if (GTEST_OS_LINUX || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS ||             \
-     (GTEST_OS_MAC && !GTEST_OS_IOS) ||                                   \
-     (GTEST_OS_WINDOWS_DESKTOP && _MSC_VER) || GTEST_OS_WINDOWS_MINGW ||  \
-     GTEST_OS_AIX || GTEST_OS_HPUX || GTEST_OS_OPENBSD || GTEST_OS_QNX || \
-     GTEST_OS_FREEBSD || GTEST_OS_NETBSD || GTEST_OS_FUCHSIA ||           \
-     GTEST_OS_DRAGONFLY || GTEST_OS_GNU_KFREEBSD || GTEST_OS_HAIKU)
-# define GTEST_HAS_DEATH_TEST 1
-#endif
-
-// Determines whether to support type-driven tests.
-
-// Typed tests need <typeinfo> and variadic macros, which GCC, VC++ 8.0,
-// Sun Pro CC, IBM Visual Age, and HP aCC support.
-#if defined(__GNUC__) || defined(_MSC_VER) || defined(__SUNPRO_CC) || \
-    defined(__IBMCPP__) || defined(__HP_aCC)
-# define GTEST_HAS_TYPED_TEST 1
-# define GTEST_HAS_TYPED_TEST_P 1
-#endif
-
-// Determines whether the system compiler uses UTF-16 for encoding wide strings.
-#define GTEST_WIDE_STRING_USES_UTF16_ \
-  (GTEST_OS_WINDOWS || GTEST_OS_CYGWIN || GTEST_OS_AIX || GTEST_OS_OS2)
-
-// Determines whether test results can be streamed to a socket.
-#if GTEST_OS_LINUX || GTEST_OS_GNU_KFREEBSD || GTEST_OS_DRAGONFLY || \
-    GTEST_OS_FREEBSD || GTEST_OS_NETBSD || GTEST_OS_OPENBSD
-# define GTEST_CAN_STREAM_RESULTS_ 1
-#endif
-
-// Defines some utility macros.
-
-// The GNU compiler emits a warning if nested "if" statements are followed by
-// an "else" statement and braces are not used to explicitly disambiguate the
-// "else" binding.  This leads to problems with code like:
-//
-//   if (gate)
-//     ASSERT_*(condition) << "Some message";
-//
-// The "switch (0) case 0:" idiom is used to suppress this.
-#ifdef __INTEL_COMPILER
-# define GTEST_AMBIGUOUS_ELSE_BLOCKER_
-#else
-# define GTEST_AMBIGUOUS_ELSE_BLOCKER_ switch (0) case 0: default:  // NOLINT
-#endif
-
-// Use this annotation at the end of a struct/class definition to
-// prevent the compiler from optimizing away instances that are never
-// used.  This is useful when all interesting logic happens inside the
-// c'tor and / or d'tor.  Example:
-//
-//   struct Foo {
-//     Foo() { ... }
-//   } GTEST_ATTRIBUTE_UNUSED_;
-//
-// Also use it after a variable or parameter declaration to tell the
-// compiler the variable/parameter does not have to be used.
-#if defined(__GNUC__) && !defined(COMPILER_ICC)
-# define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
-#elif defined(__clang__)
-# if __has_attribute(unused)
-#  define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
-# endif
-#endif
-#ifndef GTEST_ATTRIBUTE_UNUSED_
-# define GTEST_ATTRIBUTE_UNUSED_
-#endif
-
-// Use this annotation before a function that takes a printf format string.
-#if (defined(__GNUC__) || defined(__clang__)) && !defined(COMPILER_ICC)
-# if defined(__MINGW_PRINTF_FORMAT)
-// MinGW has two different printf implementations. Ensure the format macro
-// matches the selected implementation. See
-// https://sourceforge.net/p/mingw-w64/wiki2/gnu%20printf/.
-#  define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check) \
-       __attribute__((__format__(__MINGW_PRINTF_FORMAT, string_index, \
-                                 first_to_check)))
-# else
-#  define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check) \
-       __attribute__((__format__(__printf__, string_index, first_to_check)))
-# endif
-#else
-# define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check)
-#endif
-
-
-// A macro to disallow operator=
-// This should be used in the private: declarations for a class.
-#define GTEST_DISALLOW_ASSIGN_(type) \
-  void operator=(type const &) = delete
-
-// A macro to disallow copy constructor and operator=
-// This should be used in the private: declarations for a class.
-#define GTEST_DISALLOW_COPY_AND_ASSIGN_(type) \
-  type(type const &) = delete; \
-  GTEST_DISALLOW_ASSIGN_(type)
-
-// Tell the compiler to warn about unused return values for functions declared
-// with this macro.  The macro should be used on function declarations
-// following the argument list:
-//
-//   Sprocket* AllocateSprocket() GTEST_MUST_USE_RESULT_;
-#if defined(__GNUC__) && !defined(COMPILER_ICC)
-# define GTEST_MUST_USE_RESULT_ __attribute__ ((warn_unused_result))
-#else
-# define GTEST_MUST_USE_RESULT_
-#endif  // __GNUC__ && !COMPILER_ICC
-
-// MS C++ compiler emits warning when a conditional expression is compile time
-// constant. In some contexts this warning is false positive and needs to be
-// suppressed. Use the following two macros in such cases:
-//
-// GTEST_INTENTIONAL_CONST_COND_PUSH_()
-// while (true) {
-// GTEST_INTENTIONAL_CONST_COND_POP_()
-// }
-# define GTEST_INTENTIONAL_CONST_COND_PUSH_() \
-    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4127)
-# define GTEST_INTENTIONAL_CONST_COND_POP_() \
-    GTEST_DISABLE_MSC_WARNINGS_POP_()
-
-// Determine whether the compiler supports Microsoft's Structured Exception
-// Handling.  This is supported by several Windows compilers but generally
-// does not exist on any other system.
-#ifndef GTEST_HAS_SEH
-// The user didn't tell us, so we need to figure it out.
-
-# if defined(_MSC_VER) || defined(__BORLANDC__)
-// These two compilers are known to support SEH.
-#  define GTEST_HAS_SEH 1
-# else
-// Assume no SEH.
-#  define GTEST_HAS_SEH 0
-# endif
-
-#endif  // GTEST_HAS_SEH
-
-#ifndef GTEST_IS_THREADSAFE
-
-#define GTEST_IS_THREADSAFE                                                 \
-  (GTEST_HAS_MUTEX_AND_THREAD_LOCAL_ ||                                     \
-   (GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT) || \
-   GTEST_HAS_PTHREAD)
-
-#endif  // GTEST_IS_THREADSAFE
-
-// GTEST_API_ qualifies all symbols that must be exported. The definitions below
-// are guarded by #ifndef to give embedders a chance to define GTEST_API_ in
-// gtest/internal/custom/gtest-port.h
-#ifndef GTEST_API_
-
-#ifdef _MSC_VER
-# if GTEST_LINKED_AS_SHARED_LIBRARY
-#  define GTEST_API_ __declspec(dllimport)
-# elif GTEST_CREATE_SHARED_LIBRARY
-#  define GTEST_API_ __declspec(dllexport)
-# endif
-#elif __GNUC__ >= 4 || defined(__clang__)
-# define GTEST_API_ __attribute__((visibility ("default")))
-#endif  // _MSC_VER
-
-#endif  // GTEST_API_
-
-#ifndef GTEST_API_
-# define GTEST_API_
-#endif  // GTEST_API_
-
-#ifndef GTEST_DEFAULT_DEATH_TEST_STYLE
-# define GTEST_DEFAULT_DEATH_TEST_STYLE  "fast"
-#endif  // GTEST_DEFAULT_DEATH_TEST_STYLE
-
-#ifdef __GNUC__
-// Ask the compiler to never inline a given function.
-# define GTEST_NO_INLINE_ __attribute__((noinline))
-#else
-# define GTEST_NO_INLINE_
-#endif
-
-// _LIBCPP_VERSION is defined by the libc++ library from the LLVM project.
-#if !defined(GTEST_HAS_CXXABI_H_)
-# if defined(__GLIBCXX__) || (defined(_LIBCPP_VERSION) && !defined(_MSC_VER))
-#  define GTEST_HAS_CXXABI_H_ 1
-# else
-#  define GTEST_HAS_CXXABI_H_ 0
-# endif
-#endif
-
-// A function level attribute to disable checking for use of uninitialized
-// memory when built with MemorySanitizer.
-#if defined(__clang__)
-# if __has_feature(memory_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_ \
-       __attribute__((no_sanitize_memory))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-# endif  // __has_feature(memory_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-#endif  // __clang__
-
-// A function level attribute to disable AddressSanitizer instrumentation.
-#if defined(__clang__)
-# if __has_feature(address_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_ \
-       __attribute__((no_sanitize_address))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-# endif  // __has_feature(address_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-#endif  // __clang__
-
-// A function level attribute to disable HWAddressSanitizer instrumentation.
-#if defined(__clang__)
-# if __has_feature(hwaddress_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_ \
-       __attribute__((no_sanitize("hwaddress")))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-# endif  // __has_feature(hwaddress_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-#endif  // __clang__
-
-// A function level attribute to disable ThreadSanitizer instrumentation.
-#if defined(__clang__)
-# if __has_feature(thread_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_ \
-       __attribute__((no_sanitize_thread))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-# endif  // __has_feature(thread_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-#endif  // __clang__
-
-namespace testing {
-
-class Message;
-
-// Legacy imports for backwards compatibility.
-// New code should use std:: names directly.
-using std::get;
-using std::make_tuple;
-using std::tuple;
-using std::tuple_element;
-using std::tuple_size;
-
-namespace internal {
-
-// A secret type that Google Test users don't know about.  It has no
-// definition on purpose.  Therefore it's impossible to create a
-// Secret object, which is what we want.
-class Secret;
-
-// The GTEST_COMPILE_ASSERT_ is a legacy macro used to verify that a compile
-// time expression is true (in new code, use static_assert instead). For
-// example, you could use it to verify the size of a static array:
-//
-//   GTEST_COMPILE_ASSERT_(GTEST_ARRAY_SIZE_(names) == NUM_NAMES,
-//                         names_incorrect_size);
-//
-// The second argument to the macro must be a valid C++ identifier. If the
-// expression is false, compiler will issue an error containing this identifier.
-#define GTEST_COMPILE_ASSERT_(expr, msg) static_assert(expr, #msg)
-
-// Evaluates to the number of elements in 'array'.
-#define GTEST_ARRAY_SIZE_(array) (sizeof(array) / sizeof(array[0]))
-
-// A helper for suppressing warnings on constant condition.  It just
-// returns 'condition'.
-GTEST_API_ bool IsTrue(bool condition);
-
-// Defines RE.
-
-#if GTEST_USES_PCRE
-// if used, PCRE is injected by custom/gtest-port.h
-#elif GTEST_USES_POSIX_RE || GTEST_USES_SIMPLE_RE
-
-// A simple C++ wrapper for <regex.h>.  It uses the POSIX Extended
-// Regular Expression syntax.
-class GTEST_API_ RE {
- public:
-  // A copy constructor is required by the Standard to initialize object
-  // references from r-values.
-  RE(const RE& other) { Init(other.pattern()); }
-
-  // Constructs an RE from a string.
-  RE(const ::std::string& regex) { Init(regex.c_str()); }  // NOLINT
-
-  RE(const char* regex) { Init(regex); }  // NOLINT
-  ~RE();
-
-  // Returns the string representation of the regex.
-  const char* pattern() const { return pattern_; }
-
-  // FullMatch(str, re) returns true if and only if regular expression re
-  // matches the entire str.
-  // PartialMatch(str, re) returns true if and only if regular expression re
-  // matches a substring of str (including str itself).
-  static bool FullMatch(const ::std::string& str, const RE& re) {
-    return FullMatch(str.c_str(), re);
-  }
-  static bool PartialMatch(const ::std::string& str, const RE& re) {
-    return PartialMatch(str.c_str(), re);
-  }
-
-  static bool FullMatch(const char* str, const RE& re);
-  static bool PartialMatch(const char* str, const RE& re);
-
- private:
-  void Init(const char* regex);
-  const char* pattern_;
-  bool is_valid_;
-
-# if GTEST_USES_POSIX_RE
-
-  regex_t full_regex_;     // For FullMatch().
-  regex_t partial_regex_;  // For PartialMatch().
-
-# else  // GTEST_USES_SIMPLE_RE
-
-  const char* full_pattern_;  // For FullMatch();
-
-# endif
-
-  GTEST_DISALLOW_ASSIGN_(RE);
-};
-
-#endif  // GTEST_USES_PCRE
-
-// Formats a source file path and a line number as they would appear
-// in an error message from the compiler used to compile this code.
-GTEST_API_ ::std::string FormatFileLocation(const char* file, int line);
-
-// Formats a file location for compiler-independent XML output.
-// Although this function is not platform dependent, we put it next to
-// FormatFileLocation in order to contrast the two functions.
-GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(const char* file,
-                                                               int line);
-
-// Defines logging utilities:
-//   GTEST_LOG_(severity) - logs messages at the specified severity level. The
-//                          message itself is streamed into the macro.
-//   LogToStderr()  - directs all log messages to stderr.
-//   FlushInfoLog() - flushes informational log messages.
-
-enum GTestLogSeverity {
-  GTEST_INFO,
-  GTEST_WARNING,
-  GTEST_ERROR,
-  GTEST_FATAL
-};
-
-// Formats log entry severity, provides a stream object for streaming the
-// log message, and terminates the message with a newline when going out of
-// scope.
-class GTEST_API_ GTestLog {
- public:
-  GTestLog(GTestLogSeverity severity, const char* file, int line);
-
-  // Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
-  ~GTestLog();
-
-  ::std::ostream& GetStream() { return ::std::cerr; }
-
- private:
-  const GTestLogSeverity severity_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestLog);
-};
-
-#if !defined(GTEST_LOG_)
-
-# define GTEST_LOG_(severity) \
-    ::testing::internal::GTestLog(::testing::internal::GTEST_##severity, \
-                                  __FILE__, __LINE__).GetStream()
-
-inline void LogToStderr() {}
-inline void FlushInfoLog() { fflush(nullptr); }
-
-#endif  // !defined(GTEST_LOG_)
-
-#if !defined(GTEST_CHECK_)
-// INTERNAL IMPLEMENTATION - DO NOT USE.
-//
-// GTEST_CHECK_ is an all-mode assert. It aborts the program if the condition
-// is not satisfied.
-//  Synopsys:
-//    GTEST_CHECK_(boolean_condition);
-//     or
-//    GTEST_CHECK_(boolean_condition) << "Additional message";
-//
-//    This checks the condition and if the condition is not satisfied
-//    it prints message about the condition violation, including the
-//    condition itself, plus additional message streamed into it, if any,
-//    and then it aborts the program. It aborts the program irrespective of
-//    whether it is built in the debug mode or not.
-# define GTEST_CHECK_(condition) \
-    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-    if (::testing::internal::IsTrue(condition)) \
-      ; \
-    else \
-      GTEST_LOG_(FATAL) << "Condition " #condition " failed. "
-#endif  // !defined(GTEST_CHECK_)
-
-// An all-mode assert to verify that the given POSIX-style function
-// call returns 0 (indicating success).  Known limitation: this
-// doesn't expand to a balanced 'if' statement, so enclose the macro
-// in {} if you need to use it as the only statement in an 'if'
-// branch.
-#define GTEST_CHECK_POSIX_SUCCESS_(posix_call) \
-  if (const int gtest_error = (posix_call)) \
-    GTEST_LOG_(FATAL) << #posix_call << "failed with error " \
-                      << gtest_error
-
-// Transforms "T" into "const T&" according to standard reference collapsing
-// rules (this is only needed as a backport for C++98 compilers that do not
-// support reference collapsing). Specifically, it transforms:
-//
-//   char         ==> const char&
-//   const char   ==> const char&
-//   char&        ==> char&
-//   const char&  ==> const char&
-//
-// Note that the non-const reference will not have "const" added. This is
-// standard, and necessary so that "T" can always bind to "const T&".
-template <typename T>
-struct ConstRef { typedef const T& type; };
-template <typename T>
-struct ConstRef<T&> { typedef T& type; };
-
-// The argument T must depend on some template parameters.
-#define GTEST_REFERENCE_TO_CONST_(T) \
-  typename ::testing::internal::ConstRef<T>::type
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Use ImplicitCast_ as a safe version of static_cast for upcasting in
-// the type hierarchy (e.g. casting a Foo* to a SuperclassOfFoo* or a
-// const Foo*).  When you use ImplicitCast_, the compiler checks that
-// the cast is safe.  Such explicit ImplicitCast_s are necessary in
-// surprisingly many situations where C++ demands an exact type match
-// instead of an argument type convertable to a target type.
-//
-// The syntax for using ImplicitCast_ is the same as for static_cast:
-//
-//   ImplicitCast_<ToType>(expr)
-//
-// ImplicitCast_ would have been part of the C++ standard library,
-// but the proposal was submitted too late.  It will probably make
-// its way into the language in the future.
-//
-// This relatively ugly name is intentional. It prevents clashes with
-// similar functions users may have (e.g., implicit_cast). The internal
-// namespace alone is not enough because the function can be found by ADL.
-template<typename To>
-inline To ImplicitCast_(To x) { return x; }
-
-// When you upcast (that is, cast a pointer from type Foo to type
-// SuperclassOfFoo), it's fine to use ImplicitCast_<>, since upcasts
-// always succeed.  When you downcast (that is, cast a pointer from
-// type Foo to type SubclassOfFoo), static_cast<> isn't safe, because
-// how do you know the pointer is really of type SubclassOfFoo?  It
-// could be a bare Foo, or of type DifferentSubclassOfFoo.  Thus,
-// when you downcast, you should use this macro.  In debug mode, we
-// use dynamic_cast<> to double-check the downcast is legal (we die
-// if it's not).  In normal mode, we do the efficient static_cast<>
-// instead.  Thus, it's important to test in debug mode to make sure
-// the cast is legal!
-//    This is the only place in the code we should use dynamic_cast<>.
-// In particular, you SHOULDN'T be using dynamic_cast<> in order to
-// do RTTI (eg code like this:
-//    if (dynamic_cast<Subclass1>(foo)) HandleASubclass1Object(foo);
-//    if (dynamic_cast<Subclass2>(foo)) HandleASubclass2Object(foo);
-// You should design the code some other way not to need this.
-//
-// This relatively ugly name is intentional. It prevents clashes with
-// similar functions users may have (e.g., down_cast). The internal
-// namespace alone is not enough because the function can be found by ADL.
-template<typename To, typename From>  // use like this: DownCast_<T*>(foo);
-inline To DownCast_(From* f) {  // so we only accept pointers
-  // Ensures that To is a sub-type of From *.  This test is here only
-  // for compile-time type checking, and has no overhead in an
-  // optimized build at run-time, as it will be optimized away
-  // completely.
-  GTEST_INTENTIONAL_CONST_COND_PUSH_()
-  if (false) {
-  GTEST_INTENTIONAL_CONST_COND_POP_()
-  const To to = nullptr;
-  ::testing::internal::ImplicitCast_<From*>(to);
-  }
-
-#if GTEST_HAS_RTTI
-  // RTTI: debug mode only!
-  GTEST_CHECK_(f == nullptr || dynamic_cast<To>(f) != nullptr);
-#endif
-  return static_cast<To>(f);
-}
-
-// Downcasts the pointer of type Base to Derived.
-// Derived must be a subclass of Base. The parameter MUST
-// point to a class of type Derived, not any subclass of it.
-// When RTTI is available, the function performs a runtime
-// check to enforce this.
-template <class Derived, class Base>
-Derived* CheckedDowncastToActualType(Base* base) {
-#if GTEST_HAS_RTTI
-  GTEST_CHECK_(typeid(*base) == typeid(Derived));
-#endif
-
-#if GTEST_HAS_DOWNCAST_
-  return ::down_cast<Derived*>(base);
-#elif GTEST_HAS_RTTI
-  return dynamic_cast<Derived*>(base);  // NOLINT
-#else
-  return static_cast<Derived*>(base);  // Poor man's downcast.
-#endif
-}
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Defines the stderr capturer:
-//   CaptureStdout     - starts capturing stdout.
-//   GetCapturedStdout - stops capturing stdout and returns the captured string.
-//   CaptureStderr     - starts capturing stderr.
-//   GetCapturedStderr - stops capturing stderr and returns the captured string.
-//
-GTEST_API_ void CaptureStdout();
-GTEST_API_ std::string GetCapturedStdout();
-GTEST_API_ void CaptureStderr();
-GTEST_API_ std::string GetCapturedStderr();
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-// Returns the size (in bytes) of a file.
-GTEST_API_ size_t GetFileSize(FILE* file);
-
-// Reads the entire content of a file as a string.
-GTEST_API_ std::string ReadEntireFile(FILE* file);
-
-// All command line arguments.
-GTEST_API_ std::vector<std::string> GetArgvs();
-
-#if GTEST_HAS_DEATH_TEST
-
-std::vector<std::string> GetInjectableArgvs();
-// Deprecated: pass the args vector by value instead.
-void SetInjectableArgvs(const std::vector<std::string>* new_argvs);
-void SetInjectableArgvs(const std::vector<std::string>& new_argvs);
-void ClearInjectableArgvs();
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Defines synchronization primitives.
-#if GTEST_IS_THREADSAFE
-# if GTEST_HAS_PTHREAD
-// Sleeps for (roughly) n milliseconds.  This function is only for testing
-// Google Test's own constructs.  Don't use it in user tests, either
-// directly or indirectly.
-inline void SleepMilliseconds(int n) {
-  const timespec time = {
-    0,                  // 0 seconds.
-    n * 1000L * 1000L,  // And n ms.
-  };
-  nanosleep(&time, nullptr);
-}
-# endif  // GTEST_HAS_PTHREAD
-
-# if GTEST_HAS_NOTIFICATION_
-// Notification has already been imported into the namespace.
-// Nothing to do here.
-
-# elif GTEST_HAS_PTHREAD
-// Allows a controller thread to pause execution of newly created
-// threads until notified.  Instances of this class must be created
-// and destroyed in the controller thread.
-//
-// This class is only for testing Google Test's own constructs. Do not
-// use it in user tests, either directly or indirectly.
-class Notification {
- public:
-  Notification() : notified_(false) {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_init(&mutex_, nullptr));
-  }
-  ~Notification() {
-    pthread_mutex_destroy(&mutex_);
-  }
-
-  // Notifies all threads created with this notification to start. Must
-  // be called from the controller thread.
-  void Notify() {
-    pthread_mutex_lock(&mutex_);
-    notified_ = true;
-    pthread_mutex_unlock(&mutex_);
-  }
-
-  // Blocks until the controller thread notifies. Must be called from a test
-  // thread.
-  void WaitForNotification() {
-    for (;;) {
-      pthread_mutex_lock(&mutex_);
-      const bool notified = notified_;
-      pthread_mutex_unlock(&mutex_);
-      if (notified)
-        break;
-      SleepMilliseconds(10);
-    }
-  }
-
- private:
-  pthread_mutex_t mutex_;
-  bool notified_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
-};
-
-# elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-
-GTEST_API_ void SleepMilliseconds(int n);
-
-// Provides leak-safe Windows kernel handle ownership.
-// Used in death tests and in threading support.
-class GTEST_API_ AutoHandle {
- public:
-  // Assume that Win32 HANDLE type is equivalent to void*. Doing so allows us to
-  // avoid including <windows.h> in this header file. Including <windows.h> is
-  // undesirable because it defines a lot of symbols and macros that tend to
-  // conflict with client code. This assumption is verified by
-  // WindowsTypesTest.HANDLEIsVoidStar.
-  typedef void* Handle;
-  AutoHandle();
-  explicit AutoHandle(Handle handle);
-
-  ~AutoHandle();
-
-  Handle Get() const;
-  void Reset();
-  void Reset(Handle handle);
-
- private:
-  // Returns true if and only if the handle is a valid handle object that can be
-  // closed.
-  bool IsCloseable() const;
-
-  Handle handle_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(AutoHandle);
-};
-
-// Allows a controller thread to pause execution of newly created
-// threads until notified.  Instances of this class must be created
-// and destroyed in the controller thread.
-//
-// This class is only for testing Google Test's own constructs. Do not
-// use it in user tests, either directly or indirectly.
-class GTEST_API_ Notification {
- public:
-  Notification();
-  void Notify();
-  void WaitForNotification();
-
- private:
-  AutoHandle event_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
-};
-# endif  // GTEST_HAS_NOTIFICATION_
-
-// On MinGW, we can have both GTEST_OS_WINDOWS and GTEST_HAS_PTHREAD
-// defined, but we don't want to use MinGW's pthreads implementation, which
-// has conformance problems with some versions of the POSIX standard.
-# if GTEST_HAS_PTHREAD && !GTEST_OS_WINDOWS_MINGW
-
-// As a C-function, ThreadFuncWithCLinkage cannot be templated itself.
-// Consequently, it cannot select a correct instantiation of ThreadWithParam
-// in order to call its Run(). Introducing ThreadWithParamBase as a
-// non-templated base class for ThreadWithParam allows us to bypass this
-// problem.
-class ThreadWithParamBase {
- public:
-  virtual ~ThreadWithParamBase() {}
-  virtual void Run() = 0;
-};
-
-// pthread_create() accepts a pointer to a function type with the C linkage.
-// According to the Standard (7.5/1), function types with different linkages
-// are different even if they are otherwise identical.  Some compilers (for
-// example, SunStudio) treat them as different types.  Since class methods
-// cannot be defined with C-linkage we need to define a free C-function to
-// pass into pthread_create().
-extern "C" inline void* ThreadFuncWithCLinkage(void* thread) {
-  static_cast<ThreadWithParamBase*>(thread)->Run();
-  return nullptr;
-}
-
-// Helper class for testing Google Test's multi-threading constructs.
-// To use it, write:
-//
-//   void ThreadFunc(int param) { /* Do things with param */ }
-//   Notification thread_can_start;
-//   ...
-//   // The thread_can_start parameter is optional; you can supply NULL.
-//   ThreadWithParam<int> thread(&ThreadFunc, 5, &thread_can_start);
-//   thread_can_start.Notify();
-//
-// These classes are only for testing Google Test's own constructs. Do
-// not use them in user tests, either directly or indirectly.
-template <typename T>
-class ThreadWithParam : public ThreadWithParamBase {
- public:
-  typedef void UserThreadFunc(T);
-
-  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
-      : func_(func),
-        param_(param),
-        thread_can_start_(thread_can_start),
-        finished_(false) {
-    ThreadWithParamBase* const base = this;
-    // The thread can be created only after all fields except thread_
-    // have been initialized.
-    GTEST_CHECK_POSIX_SUCCESS_(
-        pthread_create(&thread_, nullptr, &ThreadFuncWithCLinkage, base));
-  }
-  ~ThreadWithParam() override { Join(); }
-
-  void Join() {
-    if (!finished_) {
-      GTEST_CHECK_POSIX_SUCCESS_(pthread_join(thread_, nullptr));
-      finished_ = true;
-    }
-  }
-
-  void Run() override {
-    if (thread_can_start_ != nullptr) thread_can_start_->WaitForNotification();
-    func_(param_);
-  }
-
- private:
-  UserThreadFunc* const func_;  // User-supplied thread function.
-  const T param_;  // User-supplied parameter to the thread function.
-  // When non-NULL, used to block execution until the controller thread
-  // notifies.
-  Notification* const thread_can_start_;
-  bool finished_;  // true if and only if we know that the thread function has
-                   // finished.
-  pthread_t thread_;  // The native thread object.
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
-};
-# endif  // !GTEST_OS_WINDOWS && GTEST_HAS_PTHREAD ||
-         // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
-
-# if GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
-// Mutex and ThreadLocal have already been imported into the namespace.
-// Nothing to do here.
-
-# elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-
-// Mutex implements mutex on Windows platforms.  It is used in conjunction
-// with class MutexLock:
-//
-//   Mutex mutex;
-//   ...
-//   MutexLock lock(&mutex);  // Acquires the mutex and releases it at the
-//                            // end of the current scope.
-//
-// A static Mutex *must* be defined or declared using one of the following
-// macros:
-//   GTEST_DEFINE_STATIC_MUTEX_(g_some_mutex);
-//   GTEST_DECLARE_STATIC_MUTEX_(g_some_mutex);
-//
-// (A non-static Mutex is defined/declared in the usual way).
-class GTEST_API_ Mutex {
- public:
-  enum MutexType { kStatic = 0, kDynamic = 1 };
-  // We rely on kStaticMutex being 0 as it is to what the linker initializes
-  // type_ in static mutexes.  critical_section_ will be initialized lazily
-  // in ThreadSafeLazyInit().
-  enum StaticConstructorSelector { kStaticMutex = 0 };
-
-  // This constructor intentionally does nothing.  It relies on type_ being
-  // statically initialized to 0 (effectively setting it to kStatic) and on
-  // ThreadSafeLazyInit() to lazily initialize the rest of the members.
-  explicit Mutex(StaticConstructorSelector /*dummy*/) {}
-
-  Mutex();
-  ~Mutex();
-
-  void Lock();
-
-  void Unlock();
-
-  // Does nothing if the current thread holds the mutex. Otherwise, crashes
-  // with high probability.
-  void AssertHeld();
-
- private:
-  // Initializes owner_thread_id_ and critical_section_ in static mutexes.
-  void ThreadSafeLazyInit();
-
-  // Per https://blogs.msdn.microsoft.com/oldnewthing/20040223-00/?p=40503,
-  // we assume that 0 is an invalid value for thread IDs.
-  unsigned int owner_thread_id_;
-
-  // For static mutexes, we rely on these members being initialized to zeros
-  // by the linker.
-  MutexType type_;
-  long critical_section_init_phase_;  // NOLINT
-  GTEST_CRITICAL_SECTION* critical_section_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
-};
-
-# define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
-    extern ::testing::internal::Mutex mutex
-
-# define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
-    ::testing::internal::Mutex mutex(::testing::internal::Mutex::kStaticMutex)
-
-// We cannot name this class MutexLock because the ctor declaration would
-// conflict with a macro named MutexLock, which is defined on some
-// platforms. That macro is used as a defensive measure to prevent against
-// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
-// "MutexLock l(&mu)".  Hence the typedef trick below.
-class GTestMutexLock {
- public:
-  explicit GTestMutexLock(Mutex* mutex)
-      : mutex_(mutex) { mutex_->Lock(); }
-
-  ~GTestMutexLock() { mutex_->Unlock(); }
-
- private:
-  Mutex* const mutex_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
-};
-
-typedef GTestMutexLock MutexLock;
-
-// Base class for ValueHolder<T>.  Allows a caller to hold and delete a value
-// without knowing its type.
-class ThreadLocalValueHolderBase {
- public:
-  virtual ~ThreadLocalValueHolderBase() {}
-};
-
-// Provides a way for a thread to send notifications to a ThreadLocal
-// regardless of its parameter type.
-class ThreadLocalBase {
- public:
-  // Creates a new ValueHolder<T> object holding a default value passed to
-  // this ThreadLocal<T>'s constructor and returns it.  It is the caller's
-  // responsibility not to call this when the ThreadLocal<T> instance already
-  // has a value on the current thread.
-  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const = 0;
-
- protected:
-  ThreadLocalBase() {}
-  virtual ~ThreadLocalBase() {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocalBase);
-};
-
-// Maps a thread to a set of ThreadLocals that have values instantiated on that
-// thread and notifies them when the thread exits.  A ThreadLocal instance is
-// expected to persist until all threads it has values on have terminated.
-class GTEST_API_ ThreadLocalRegistry {
- public:
-  // Registers thread_local_instance as having value on the current thread.
-  // Returns a value that can be used to identify the thread from other threads.
-  static ThreadLocalValueHolderBase* GetValueOnCurrentThread(
-      const ThreadLocalBase* thread_local_instance);
-
-  // Invoked when a ThreadLocal instance is destroyed.
-  static void OnThreadLocalDestroyed(
-      const ThreadLocalBase* thread_local_instance);
-};
-
-class GTEST_API_ ThreadWithParamBase {
- public:
-  void Join();
-
- protected:
-  class Runnable {
-   public:
-    virtual ~Runnable() {}
-    virtual void Run() = 0;
-  };
-
-  ThreadWithParamBase(Runnable *runnable, Notification* thread_can_start);
-  virtual ~ThreadWithParamBase();
-
- private:
-  AutoHandle thread_;
-};
-
-// Helper class for testing Google Test's multi-threading constructs.
-template <typename T>
-class ThreadWithParam : public ThreadWithParamBase {
- public:
-  typedef void UserThreadFunc(T);
-
-  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
-      : ThreadWithParamBase(new RunnableImpl(func, param), thread_can_start) {
-  }
-  virtual ~ThreadWithParam() {}
-
- private:
-  class RunnableImpl : public Runnable {
-   public:
-    RunnableImpl(UserThreadFunc* func, T param)
-        : func_(func),
-          param_(param) {
-    }
-    virtual ~RunnableImpl() {}
-    virtual void Run() {
-      func_(param_);
-    }
-
-   private:
-    UserThreadFunc* const func_;
-    const T param_;
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(RunnableImpl);
-  };
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
-};
-
-// Implements thread-local storage on Windows systems.
-//
-//   // Thread 1
-//   ThreadLocal<int> tl(100);  // 100 is the default value for each thread.
-//
-//   // Thread 2
-//   tl.set(150);  // Changes the value for thread 2 only.
-//   EXPECT_EQ(150, tl.get());
-//
-//   // Thread 1
-//   EXPECT_EQ(100, tl.get());  // In thread 1, tl has the original value.
-//   tl.set(200);
-//   EXPECT_EQ(200, tl.get());
-//
-// The template type argument T must have a public copy constructor.
-// In addition, the default ThreadLocal constructor requires T to have
-// a public default constructor.
-//
-// The users of a TheadLocal instance have to make sure that all but one
-// threads (including the main one) using that instance have exited before
-// destroying it. Otherwise, the per-thread objects managed for them by the
-// ThreadLocal instance are not guaranteed to be destroyed on all platforms.
-//
-// Google Test only uses global ThreadLocal objects.  That means they
-// will die after main() has returned.  Therefore, no per-thread
-// object managed by Google Test will be leaked as long as all threads
-// using Google Test have exited when main() returns.
-template <typename T>
-class ThreadLocal : public ThreadLocalBase {
- public:
-  ThreadLocal() : default_factory_(new DefaultValueHolderFactory()) {}
-  explicit ThreadLocal(const T& value)
-      : default_factory_(new InstanceValueHolderFactory(value)) {}
-
-  ~ThreadLocal() { ThreadLocalRegistry::OnThreadLocalDestroyed(this); }
-
-  T* pointer() { return GetOrCreateValue(); }
-  const T* pointer() const { return GetOrCreateValue(); }
-  const T& get() const { return *pointer(); }
-  void set(const T& value) { *pointer() = value; }
-
- private:
-  // Holds a value of T.  Can be deleted via its base class without the caller
-  // knowing the type of T.
-  class ValueHolder : public ThreadLocalValueHolderBase {
-   public:
-    ValueHolder() : value_() {}
-    explicit ValueHolder(const T& value) : value_(value) {}
-
-    T* pointer() { return &value_; }
-
-   private:
-    T value_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
-  };
-
-
-  T* GetOrCreateValue() const {
-    return static_cast<ValueHolder*>(
-        ThreadLocalRegistry::GetValueOnCurrentThread(this))->pointer();
-  }
-
-  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const {
-    return default_factory_->MakeNewHolder();
-  }
-
-  class ValueHolderFactory {
-   public:
-    ValueHolderFactory() {}
-    virtual ~ValueHolderFactory() {}
-    virtual ValueHolder* MakeNewHolder() const = 0;
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
-  };
-
-  class DefaultValueHolderFactory : public ValueHolderFactory {
-   public:
-    DefaultValueHolderFactory() {}
-    virtual ValueHolder* MakeNewHolder() const { return new ValueHolder(); }
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
-  };
-
-  class InstanceValueHolderFactory : public ValueHolderFactory {
-   public:
-    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
-    virtual ValueHolder* MakeNewHolder() const {
-      return new ValueHolder(value_);
-    }
-
-   private:
-    const T value_;  // The value for each thread.
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
-  };
-
-  std::unique_ptr<ValueHolderFactory> default_factory_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
-};
-
-# elif GTEST_HAS_PTHREAD
-
-// MutexBase and Mutex implement mutex on pthreads-based platforms.
-class MutexBase {
- public:
-  // Acquires this mutex.
-  void Lock() {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_lock(&mutex_));
-    owner_ = pthread_self();
-    has_owner_ = true;
-  }
-
-  // Releases this mutex.
-  void Unlock() {
-    // Since the lock is being released the owner_ field should no longer be
-    // considered valid. We don't protect writing to has_owner_ here, as it's
-    // the caller's responsibility to ensure that the current thread holds the
-    // mutex when this is called.
-    has_owner_ = false;
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_unlock(&mutex_));
-  }
-
-  // Does nothing if the current thread holds the mutex. Otherwise, crashes
-  // with high probability.
-  void AssertHeld() const {
-    GTEST_CHECK_(has_owner_ && pthread_equal(owner_, pthread_self()))
-        << "The current thread is not holding the mutex @" << this;
-  }
-
-  // A static mutex may be used before main() is entered.  It may even
-  // be used before the dynamic initialization stage.  Therefore we
-  // must be able to initialize a static mutex object at link time.
-  // This means MutexBase has to be a POD and its member variables
-  // have to be public.
- public:
-  pthread_mutex_t mutex_;  // The underlying pthread mutex.
-  // has_owner_ indicates whether the owner_ field below contains a valid thread
-  // ID and is therefore safe to inspect (e.g., to use in pthread_equal()). All
-  // accesses to the owner_ field should be protected by a check of this field.
-  // An alternative might be to memset() owner_ to all zeros, but there's no
-  // guarantee that a zero'd pthread_t is necessarily invalid or even different
-  // from pthread_self().
-  bool has_owner_;
-  pthread_t owner_;  // The thread holding the mutex.
-};
-
-// Forward-declares a static mutex.
-#  define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
-     extern ::testing::internal::MutexBase mutex
-
-// Defines and statically (i.e. at link time) initializes a static mutex.
-// The initialization list here does not explicitly initialize each field,
-// instead relying on default initialization for the unspecified fields. In
-// particular, the owner_ field (a pthread_t) is not explicitly initialized.
-// This allows initialization to work whether pthread_t is a scalar or struct.
-// The flag -Wmissing-field-initializers must not be specified for this to work.
-#define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
-  ::testing::internal::MutexBase mutex = {PTHREAD_MUTEX_INITIALIZER, false, 0}
-
-// The Mutex class can only be used for mutexes created at runtime. It
-// shares its API with MutexBase otherwise.
-class Mutex : public MutexBase {
- public:
-  Mutex() {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_init(&mutex_, nullptr));
-    has_owner_ = false;
-  }
-  ~Mutex() {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_destroy(&mutex_));
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
-};
-
-// We cannot name this class MutexLock because the ctor declaration would
-// conflict with a macro named MutexLock, which is defined on some
-// platforms. That macro is used as a defensive measure to prevent against
-// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
-// "MutexLock l(&mu)".  Hence the typedef trick below.
-class GTestMutexLock {
- public:
-  explicit GTestMutexLock(MutexBase* mutex)
-      : mutex_(mutex) { mutex_->Lock(); }
-
-  ~GTestMutexLock() { mutex_->Unlock(); }
-
- private:
-  MutexBase* const mutex_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
-};
-
-typedef GTestMutexLock MutexLock;
-
-// Helpers for ThreadLocal.
-
-// pthread_key_create() requires DeleteThreadLocalValue() to have
-// C-linkage.  Therefore it cannot be templatized to access
-// ThreadLocal<T>.  Hence the need for class
-// ThreadLocalValueHolderBase.
-class ThreadLocalValueHolderBase {
- public:
-  virtual ~ThreadLocalValueHolderBase() {}
-};
-
-// Called by pthread to delete thread-local data stored by
-// pthread_setspecific().
-extern "C" inline void DeleteThreadLocalValue(void* value_holder) {
-  delete static_cast<ThreadLocalValueHolderBase*>(value_holder);
-}
-
-// Implements thread-local storage on pthreads-based systems.
-template <typename T>
-class GTEST_API_ ThreadLocal {
- public:
-  ThreadLocal()
-      : key_(CreateKey()), default_factory_(new DefaultValueHolderFactory()) {}
-  explicit ThreadLocal(const T& value)
-      : key_(CreateKey()),
-        default_factory_(new InstanceValueHolderFactory(value)) {}
-
-  ~ThreadLocal() {
-    // Destroys the managed object for the current thread, if any.
-    DeleteThreadLocalValue(pthread_getspecific(key_));
-
-    // Releases resources associated with the key.  This will *not*
-    // delete managed objects for other threads.
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_key_delete(key_));
-  }
-
-  T* pointer() { return GetOrCreateValue(); }
-  const T* pointer() const { return GetOrCreateValue(); }
-  const T& get() const { return *pointer(); }
-  void set(const T& value) { *pointer() = value; }
-
- private:
-  // Holds a value of type T.
-  class ValueHolder : public ThreadLocalValueHolderBase {
-   public:
-    ValueHolder() : value_() {}
-    explicit ValueHolder(const T& value) : value_(value) {}
-
-    T* pointer() { return &value_; }
-
-   private:
-    T value_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
-  };
-
-  static pthread_key_t CreateKey() {
-    pthread_key_t key;
-    // When a thread exits, DeleteThreadLocalValue() will be called on
-    // the object managed for that thread.
-    GTEST_CHECK_POSIX_SUCCESS_(
-        pthread_key_create(&key, &DeleteThreadLocalValue));
-    return key;
-  }
-
-  T* GetOrCreateValue() const {
-    ThreadLocalValueHolderBase* const holder =
-        static_cast<ThreadLocalValueHolderBase*>(pthread_getspecific(key_));
-    if (holder != nullptr) {
-      return CheckedDowncastToActualType<ValueHolder>(holder)->pointer();
-    }
-
-    ValueHolder* const new_holder = default_factory_->MakeNewHolder();
-    ThreadLocalValueHolderBase* const holder_base = new_holder;
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_setspecific(key_, holder_base));
-    return new_holder->pointer();
-  }
-
-  class ValueHolderFactory {
-   public:
-    ValueHolderFactory() {}
-    virtual ~ValueHolderFactory() {}
-    virtual ValueHolder* MakeNewHolder() const = 0;
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
-  };
-
-  class DefaultValueHolderFactory : public ValueHolderFactory {
-   public:
-    DefaultValueHolderFactory() {}
-    virtual ValueHolder* MakeNewHolder() const { return new ValueHolder(); }
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
-  };
-
-  class InstanceValueHolderFactory : public ValueHolderFactory {
-   public:
-    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
-    virtual ValueHolder* MakeNewHolder() const {
-      return new ValueHolder(value_);
-    }
-
-   private:
-    const T value_;  // The value for each thread.
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
-  };
-
-  // A key pthreads uses for looking up per-thread values.
-  const pthread_key_t key_;
-  std::unique_ptr<ValueHolderFactory> default_factory_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
-};
-
-# endif  // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
-
-#else  // GTEST_IS_THREADSAFE
-
-// A dummy implementation of synchronization primitives (mutex, lock,
-// and thread-local variable).  Necessary for compiling Google Test where
-// mutex is not supported - using Google Test in multiple threads is not
-// supported on such platforms.
-
-class Mutex {
- public:
-  Mutex() {}
-  void Lock() {}
-  void Unlock() {}
-  void AssertHeld() const {}
-};
-
-# define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
-  extern ::testing::internal::Mutex mutex
-
-# define GTEST_DEFINE_STATIC_MUTEX_(mutex) ::testing::internal::Mutex mutex
-
-// We cannot name this class MutexLock because the ctor declaration would
-// conflict with a macro named MutexLock, which is defined on some
-// platforms. That macro is used as a defensive measure to prevent against
-// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
-// "MutexLock l(&mu)".  Hence the typedef trick below.
-class GTestMutexLock {
- public:
-  explicit GTestMutexLock(Mutex*) {}  // NOLINT
-};
-
-typedef GTestMutexLock MutexLock;
-
-template <typename T>
-class GTEST_API_ ThreadLocal {
- public:
-  ThreadLocal() : value_() {}
-  explicit ThreadLocal(const T& value) : value_(value) {}
-  T* pointer() { return &value_; }
-  const T* pointer() const { return &value_; }
-  const T& get() const { return value_; }
-  void set(const T& value) { value_ = value; }
- private:
-  T value_;
-};
-
-#endif  // GTEST_IS_THREADSAFE
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-GTEST_API_ size_t GetThreadCount();
-
-template <bool B>
-using bool_constant = std::integral_constant<bool, B>;
-
-#if GTEST_OS_WINDOWS
-# define GTEST_PATH_SEP_ "\\"
-# define GTEST_HAS_ALT_PATH_SEP_ 1
-// The biggest signed integer type the compiler supports.
-typedef __int64 BiggestInt;
-#else
-# define GTEST_PATH_SEP_ "/"
-# define GTEST_HAS_ALT_PATH_SEP_ 0
-typedef long long BiggestInt;  // NOLINT
-#endif  // GTEST_OS_WINDOWS
-
-// Utilities for char.
-
-// isspace(int ch) and friends accept an unsigned char or EOF.  char
-// may be signed, depending on the compiler (or compiler flags).
-// Therefore we need to cast a char to unsigned char before calling
-// isspace(), etc.
-
-inline bool IsAlpha(char ch) {
-  return isalpha(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsAlNum(char ch) {
-  return isalnum(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsDigit(char ch) {
-  return isdigit(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsLower(char ch) {
-  return islower(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsSpace(char ch) {
-  return isspace(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsUpper(char ch) {
-  return isupper(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsXDigit(char ch) {
-  return isxdigit(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsXDigit(wchar_t ch) {
-  const unsigned char low_byte = static_cast<unsigned char>(ch);
-  return ch == low_byte && isxdigit(low_byte) != 0;
-}
-
-inline char ToLower(char ch) {
-  return static_cast<char>(tolower(static_cast<unsigned char>(ch)));
-}
-inline char ToUpper(char ch) {
-  return static_cast<char>(toupper(static_cast<unsigned char>(ch)));
-}
-
-inline std::string StripTrailingSpaces(std::string str) {
-  std::string::iterator it = str.end();
-  while (it != str.begin() && IsSpace(*--it))
-    it = str.erase(it);
-  return str;
-}
-
-// The testing::internal::posix namespace holds wrappers for common
-// POSIX functions.  These wrappers hide the differences between
-// Windows/MSVC and POSIX systems.  Since some compilers define these
-// standard functions as macros, the wrapper cannot have the same name
-// as the wrapped function.
-
-namespace posix {
-
-// Functions with a different name on Windows.
-
-#if GTEST_OS_WINDOWS
-
-typedef struct _stat StatStruct;
-
-# ifdef __BORLANDC__
-inline int IsATTY(int fd) { return isatty(fd); }
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return stricmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return strdup(src); }
-# else  // !__BORLANDC__
-#  if GTEST_OS_WINDOWS_MOBILE
-inline int IsATTY(int /* fd */) { return 0; }
-#  else
-inline int IsATTY(int fd) { return _isatty(fd); }
-#  endif  // GTEST_OS_WINDOWS_MOBILE
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return _stricmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return _strdup(src); }
-# endif  // __BORLANDC__
-
-# if GTEST_OS_WINDOWS_MOBILE
-inline int FileNo(FILE* file) { return reinterpret_cast<int>(_fileno(file)); }
-// Stat(), RmDir(), and IsDir() are not needed on Windows CE at this
-// time and thus not defined there.
-# else
-inline int FileNo(FILE* file) { return _fileno(file); }
-inline int Stat(const char* path, StatStruct* buf) { return _stat(path, buf); }
-inline int RmDir(const char* dir) { return _rmdir(dir); }
-inline bool IsDir(const StatStruct& st) {
-  return (_S_IFDIR & st.st_mode) != 0;
-}
-# endif  // GTEST_OS_WINDOWS_MOBILE
-
-#else
-
-typedef struct stat StatStruct;
-
-inline int FileNo(FILE* file) { return fileno(file); }
-inline int IsATTY(int fd) { return isatty(fd); }
-inline int Stat(const char* path, StatStruct* buf) { return stat(path, buf); }
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return strcasecmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return strdup(src); }
-inline int RmDir(const char* dir) { return rmdir(dir); }
-inline bool IsDir(const StatStruct& st) { return S_ISDIR(st.st_mode); }
-
-#endif  // GTEST_OS_WINDOWS
-
-// Functions deprecated by MSVC 8.0.
-
-GTEST_DISABLE_MSC_DEPRECATED_PUSH_()
-
-inline const char* StrNCpy(char* dest, const char* src, size_t n) {
-  return strncpy(dest, src, n);
-}
-
-// ChDir(), FReopen(), FDOpen(), Read(), Write(), Close(), and
-// StrError() aren't needed on Windows CE at this time and thus not
-// defined there.
-
-#if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-inline int ChDir(const char* dir) { return chdir(dir); }
-#endif
-inline FILE* FOpen(const char* path, const char* mode) {
-  return fopen(path, mode);
-}
-#if !GTEST_OS_WINDOWS_MOBILE
-inline FILE *FReopen(const char* path, const char* mode, FILE* stream) {
-  return freopen(path, mode, stream);
-}
-inline FILE* FDOpen(int fd, const char* mode) { return fdopen(fd, mode); }
-#endif
-inline int FClose(FILE* fp) { return fclose(fp); }
-#if !GTEST_OS_WINDOWS_MOBILE
-inline int Read(int fd, void* buf, unsigned int count) {
-  return static_cast<int>(read(fd, buf, count));
-}
-inline int Write(int fd, const void* buf, unsigned int count) {
-  return static_cast<int>(write(fd, buf, count));
-}
-inline int Close(int fd) { return close(fd); }
-inline const char* StrError(int errnum) { return strerror(errnum); }
-#endif
-inline const char* GetEnv(const char* name) {
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE || GTEST_OS_WINDOWS_RT
-  // We are on Windows CE, which has no environment variables.
-  static_cast<void>(name);  // To prevent 'unused argument' warning.
-  return nullptr;
-#elif defined(__BORLANDC__) || defined(__SunOS_5_8) || defined(__SunOS_5_9)
-  // Environment variables which we programmatically clear will be set to the
-  // empty string rather than unset (NULL).  Handle that case.
-  const char* const env = getenv(name);
-  return (env != nullptr && env[0] != '\0') ? env : nullptr;
-#else
-  return getenv(name);
-#endif
-}
-
-GTEST_DISABLE_MSC_DEPRECATED_POP_()
-
-#if GTEST_OS_WINDOWS_MOBILE
-// Windows CE has no C library. The abort() function is used in
-// several places in Google Test. This implementation provides a reasonable
-// imitation of standard behaviour.
-[[noreturn]] void Abort();
-#else
-[[noreturn]] inline void Abort() { abort(); }
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-}  // namespace posix
-
-// MSVC "deprecates" snprintf and issues warnings wherever it is used.  In
-// order to avoid these warnings, we need to use _snprintf or _snprintf_s on
-// MSVC-based platforms.  We map the GTEST_SNPRINTF_ macro to the appropriate
-// function in order to achieve that.  We use macro definition here because
-// snprintf is a variadic function.
-#if _MSC_VER && !GTEST_OS_WINDOWS_MOBILE
-// MSVC 2005 and above support variadic macros.
-# define GTEST_SNPRINTF_(buffer, size, format, ...) \
-     _snprintf_s(buffer, size, size, format, __VA_ARGS__)
-#elif defined(_MSC_VER)
-// Windows CE does not define _snprintf_s
-# define GTEST_SNPRINTF_ _snprintf
-#else
-# define GTEST_SNPRINTF_ snprintf
-#endif
-
-// The maximum number a BiggestInt can represent.  This definition
-// works no matter BiggestInt is represented in one's complement or
-// two's complement.
-//
-// We cannot rely on numeric_limits in STL, as __int64 and long long
-// are not part of standard C++ and numeric_limits doesn't need to be
-// defined for them.
-const BiggestInt kMaxBiggestInt =
-    ~(static_cast<BiggestInt>(1) << (8*sizeof(BiggestInt) - 1));
-
-// This template class serves as a compile-time function from size to
-// type.  It maps a size in bytes to a primitive type with that
-// size. e.g.
-//
-//   TypeWithSize<4>::UInt
-//
-// is typedef-ed to be unsigned int (unsigned integer made up of 4
-// bytes).
-//
-// Such functionality should belong to STL, but I cannot find it
-// there.
-//
-// Google Test uses this class in the implementation of floating-point
-// comparison.
-//
-// For now it only handles UInt (unsigned int) as that's all Google Test
-// needs.  Other types can be easily added in the future if need
-// arises.
-template <size_t size>
-class TypeWithSize {
- public:
-  // This prevents the user from using TypeWithSize<N> with incorrect
-  // values of N.
-  typedef void UInt;
-};
-
-// The specialization for size 4.
-template <>
-class TypeWithSize<4> {
- public:
-  // unsigned int has size 4 in both gcc and MSVC.
-  //
-  // As base/basictypes.h doesn't compile on Windows, we cannot use
-  // uint32, uint64, and etc here.
-  typedef int Int;
-  typedef unsigned int UInt;
-};
-
-// The specialization for size 8.
-template <>
-class TypeWithSize<8> {
- public:
-#if GTEST_OS_WINDOWS
-  typedef __int64 Int;
-  typedef unsigned __int64 UInt;
-#else
-  typedef long long Int;  // NOLINT
-  typedef unsigned long long UInt;  // NOLINT
-#endif  // GTEST_OS_WINDOWS
-};
-
-// Integer types of known sizes.
-typedef TypeWithSize<4>::Int Int32;
-typedef TypeWithSize<4>::UInt UInt32;
-typedef TypeWithSize<8>::Int Int64;
-typedef TypeWithSize<8>::UInt UInt64;
-typedef TypeWithSize<8>::Int TimeInMillis;  // Represents time in milliseconds.
-
-// Utilities for command line flags and environment variables.
-
-// Macro for referencing flags.
-#if !defined(GTEST_FLAG)
-# define GTEST_FLAG(name) FLAGS_gtest_##name
-#endif  // !defined(GTEST_FLAG)
-
-#if !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
-# define GTEST_USE_OWN_FLAGFILE_FLAG_ 1
-#endif  // !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
-
-#if !defined(GTEST_DECLARE_bool_)
-# define GTEST_FLAG_SAVER_ ::testing::internal::GTestFlagSaver
-
-// Macros for declaring flags.
-# define GTEST_DECLARE_bool_(name) GTEST_API_ extern bool GTEST_FLAG(name)
-# define GTEST_DECLARE_int32_(name) \
-    GTEST_API_ extern ::testing::internal::Int32 GTEST_FLAG(name)
-# define GTEST_DECLARE_string_(name) \
-    GTEST_API_ extern ::std::string GTEST_FLAG(name)
-
-// Macros for defining flags.
-# define GTEST_DEFINE_bool_(name, default_val, doc) \
-    GTEST_API_ bool GTEST_FLAG(name) = (default_val)
-# define GTEST_DEFINE_int32_(name, default_val, doc) \
-    GTEST_API_ ::testing::internal::Int32 GTEST_FLAG(name) = (default_val)
-# define GTEST_DEFINE_string_(name, default_val, doc) \
-    GTEST_API_ ::std::string GTEST_FLAG(name) = (default_val)
-
-#endif  // !defined(GTEST_DECLARE_bool_)
-
-// Thread annotations
-#if !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
-# define GTEST_EXCLUSIVE_LOCK_REQUIRED_(locks)
-# define GTEST_LOCK_EXCLUDED_(locks)
-#endif  // !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
-
-// Parses 'str' for a 32-bit signed integer.  If successful, writes the result
-// to *value and returns true; otherwise leaves *value unchanged and returns
-// false.
-bool ParseInt32(const Message& src_text, const char* str, Int32* value);
-
-// Parses a bool/Int32/string from the environment variable
-// corresponding to the given Google Test flag.
-bool BoolFromGTestEnv(const char* flag, bool default_val);
-GTEST_API_ Int32 Int32FromGTestEnv(const char* flag, Int32 default_val);
-std::string OutputFlagAlsoCheckEnvVar();
-const char* StringFromGTestEnv(const char* flag, const char* default_val);
-
-}  // namespace internal
-}  // namespace testing
-
-#if !defined(GTEST_INTERNAL_DEPRECATED)
-
-// Internal Macro to mark an API deprecated, for googletest usage only
-// Usage: class GTEST_INTERNAL_DEPRECATED(message) MyClass or
-// GTEST_INTERNAL_DEPRECATED(message) <return_type> myFunction(); Every usage of
-// a deprecated entity will trigger a warning when compiled with
-// `-Wdeprecated-declarations` option (clang, gcc, any __GNUC__ compiler).
-// For msvc /W3 option will need to be used
-// Note that for 'other' compilers this macro evaluates to nothing to prevent
-// compilations errors.
-#if defined(_MSC_VER)
-#define GTEST_INTERNAL_DEPRECATED(message) __declspec(deprecated(message))
-#elif defined(__GNUC__)
-#define GTEST_INTERNAL_DEPRECATED(message) __attribute__((deprecated(message)))
-#else
-#define GTEST_INTERNAL_DEPRECATED(message)
-#endif
-
-#endif  // !defined(GTEST_INTERNAL_DEPRECATED)
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-string.h b/3rdparty/gtest/include/gtest/internal/gtest-string.h
deleted file mode 100644
index 82aaa63b..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-string.h
+++ /dev/null
@@ -1,171 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file declares the String class and functions used internally by
-// Google Test.  They are subject to change without notice. They should not used
-// by code external to Google Test.
-//
-// This header file is #included by gtest-internal.h.
-// It should not be #included by other files.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
-
-#ifdef __BORLANDC__
-// string.h is not guaranteed to provide strcpy on C++ Builder.
-# include <mem.h>
-#endif
-
-#include <string.h>
-#include <string>
-
-#include "gtest/internal/gtest-port.h"
-
-namespace testing {
-namespace internal {
-
-// String - an abstract class holding static string utilities.
-class GTEST_API_ String {
- public:
-  // Static utility methods
-
-  // Clones a 0-terminated C string, allocating memory using new.  The
-  // caller is responsible for deleting the return value using
-  // delete[].  Returns the cloned string, or NULL if the input is
-  // NULL.
-  //
-  // This is different from strdup() in string.h, which allocates
-  // memory using malloc().
-  static const char* CloneCString(const char* c_str);
-
-#if GTEST_OS_WINDOWS_MOBILE
-  // Windows CE does not have the 'ANSI' versions of Win32 APIs. To be
-  // able to pass strings to Win32 APIs on CE we need to convert them
-  // to 'Unicode', UTF-16.
-
-  // Creates a UTF-16 wide string from the given ANSI string, allocating
-  // memory using new. The caller is responsible for deleting the return
-  // value using delete[]. Returns the wide string, or NULL if the
-  // input is NULL.
-  //
-  // The wide string is created using the ANSI codepage (CP_ACP) to
-  // match the behaviour of the ANSI versions of Win32 calls and the
-  // C runtime.
-  static LPCWSTR AnsiToUtf16(const char* c_str);
-
-  // Creates an ANSI string from the given wide string, allocating
-  // memory using new. The caller is responsible for deleting the return
-  // value using delete[]. Returns the ANSI string, or NULL if the
-  // input is NULL.
-  //
-  // The returned string is created using the ANSI codepage (CP_ACP) to
-  // match the behaviour of the ANSI versions of Win32 calls and the
-  // C runtime.
-  static const char* Utf16ToAnsi(LPCWSTR utf16_str);
-#endif
-
-  // Compares two C strings.  Returns true if and only if they have the same
-  // content.
-  //
-  // Unlike strcmp(), this function can handle NULL argument(s).  A
-  // NULL C string is considered different to any non-NULL C string,
-  // including the empty string.
-  static bool CStringEquals(const char* lhs, const char* rhs);
-
-  // Converts a wide C string to a String using the UTF-8 encoding.
-  // NULL will be converted to "(null)".  If an error occurred during
-  // the conversion, "(failed to convert from wide string)" is
-  // returned.
-  static std::string ShowWideCString(const wchar_t* wide_c_str);
-
-  // Compares two wide C strings.  Returns true if and only if they have the
-  // same content.
-  //
-  // Unlike wcscmp(), this function can handle NULL argument(s).  A
-  // NULL C string is considered different to any non-NULL C string,
-  // including the empty string.
-  static bool WideCStringEquals(const wchar_t* lhs, const wchar_t* rhs);
-
-  // Compares two C strings, ignoring case.  Returns true if and only if
-  // they have the same content.
-  //
-  // Unlike strcasecmp(), this function can handle NULL argument(s).
-  // A NULL C string is considered different to any non-NULL C string,
-  // including the empty string.
-  static bool CaseInsensitiveCStringEquals(const char* lhs,
-                                           const char* rhs);
-
-  // Compares two wide C strings, ignoring case.  Returns true if and only if
-  // they have the same content.
-  //
-  // Unlike wcscasecmp(), this function can handle NULL argument(s).
-  // A NULL C string is considered different to any non-NULL wide C string,
-  // including the empty string.
-  // NB: The implementations on different platforms slightly differ.
-  // On windows, this method uses _wcsicmp which compares according to LC_CTYPE
-  // environment variable. On GNU platform this method uses wcscasecmp
-  // which compares according to LC_CTYPE category of the current locale.
-  // On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
-  // current locale.
-  static bool CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
-                                               const wchar_t* rhs);
-
-  // Returns true if and only if the given string ends with the given suffix,
-  // ignoring case. Any string is considered to end with an empty suffix.
-  static bool EndsWithCaseInsensitive(
-      const std::string& str, const std::string& suffix);
-
-  // Formats an int value as "%02d".
-  static std::string FormatIntWidth2(int value);  // "%02d" for width == 2
-
-  // Formats an int value as "%X".
-  static std::string FormatHexInt(int value);
-
-  // Formats an int value as "%X".
-  static std::string FormatHexUInt32(UInt32 value);
-
-  // Formats a byte as "%02X".
-  static std::string FormatByte(unsigned char value);
-
- private:
-  String();  // Not meant to be instantiated.
-};  // class String
-
-// Gets the content of the stringstream's buffer as an std::string.  Each '\0'
-// character in the buffer is replaced with "\\0".
-GTEST_API_ std::string StringStreamToString(::std::stringstream* stream);
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-type-util.h b/3rdparty/gtest/include/gtest/internal/gtest-type-util.h
deleted file mode 100644
index 3d7542d1..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-type-util.h
+++ /dev/null
@@ -1,3335 +0,0 @@
-// This file was GENERATED by command:
-//     pump.py gtest-type-util.h.pump
-// DO NOT EDIT BY HAND!!!
-
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Type utilities needed for implementing typed and type-parameterized
-// tests.  This file is generated by a SCRIPT.  DO NOT EDIT BY HAND!
-//
-// Currently we support at most 50 types in a list, and at most 50
-// type-parameterized tests in one type-parameterized test suite.
-// Please contact googletestframework@googlegroups.com if you need
-// more.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
-
-#include "gtest/internal/gtest-port.h"
-
-// #ifdef __GNUC__ is too general here.  It is possible to use gcc without using
-// libstdc++ (which is where cxxabi.h comes from).
-# if GTEST_HAS_CXXABI_H_
-#  include <cxxabi.h>
-# elif defined(__HP_aCC)
-#  include <acxx_demangle.h>
-# endif  // GTEST_HASH_CXXABI_H_
-
-namespace testing {
-namespace internal {
-
-// Canonicalizes a given name with respect to the Standard C++ Library.
-// This handles removing the inline namespace within `std` that is
-// used by various standard libraries (e.g., `std::__1`).  Names outside
-// of namespace std are returned unmodified.
-inline std::string CanonicalizeForStdLibVersioning(std::string s) {
-  static const char prefix[] = "std::__";
-  if (s.compare(0, strlen(prefix), prefix) == 0) {
-    std::string::size_type end = s.find("::", strlen(prefix));
-    if (end != s.npos) {
-      // Erase everything between the initial `std` and the second `::`.
-      s.erase(strlen("std"), end - strlen("std"));
-    }
-  }
-  return s;
-}
-
-// GetTypeName<T>() returns a human-readable name of type T.
-// NB: This function is also used in Google Mock, so don't move it inside of
-// the typed-test-only section below.
-template <typename T>
-std::string GetTypeName() {
-# if GTEST_HAS_RTTI
-
-  const char* const name = typeid(T).name();
-#  if GTEST_HAS_CXXABI_H_ || defined(__HP_aCC)
-  int status = 0;
-  // gcc's implementation of typeid(T).name() mangles the type name,
-  // so we have to demangle it.
-#   if GTEST_HAS_CXXABI_H_
-  using abi::__cxa_demangle;
-#   endif  // GTEST_HAS_CXXABI_H_
-  char* const readable_name = __cxa_demangle(name, nullptr, nullptr, &status);
-  const std::string name_str(status == 0 ? readable_name : name);
-  free(readable_name);
-  return CanonicalizeForStdLibVersioning(name_str);
-#  else
-  return name;
-#  endif  // GTEST_HAS_CXXABI_H_ || __HP_aCC
-
-# else
-
-  return "<type>";
-
-# endif  // GTEST_HAS_RTTI
-}
-
-#if GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
-
-// A unique type used as the default value for the arguments of class
-// template Types.  This allows us to simulate variadic templates
-// (e.g. Types<int>, Type<int, double>, and etc), which C++ doesn't
-// support directly.
-struct None {};
-
-// The following family of struct and struct templates are used to
-// represent type lists.  In particular, TypesN<T1, T2, ..., TN>
-// represents a type list with N types (T1, T2, ..., and TN) in it.
-// Except for Types0, every struct in the family has two member types:
-// Head for the first type in the list, and Tail for the rest of the
-// list.
-
-// The empty type list.
-struct Types0 {};
-
-// Type lists of length 1, 2, 3, and so on.
-
-template <typename T1>
-struct Types1 {
-  typedef T1 Head;
-  typedef Types0 Tail;
-};
-template <typename T1, typename T2>
-struct Types2 {
-  typedef T1 Head;
-  typedef Types1<T2> Tail;
-};
-
-template <typename T1, typename T2, typename T3>
-struct Types3 {
-  typedef T1 Head;
-  typedef Types2<T2, T3> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4>
-struct Types4 {
-  typedef T1 Head;
-  typedef Types3<T2, T3, T4> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5>
-struct Types5 {
-  typedef T1 Head;
-  typedef Types4<T2, T3, T4, T5> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6>
-struct Types6 {
-  typedef T1 Head;
-  typedef Types5<T2, T3, T4, T5, T6> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7>
-struct Types7 {
-  typedef T1 Head;
-  typedef Types6<T2, T3, T4, T5, T6, T7> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8>
-struct Types8 {
-  typedef T1 Head;
-  typedef Types7<T2, T3, T4, T5, T6, T7, T8> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9>
-struct Types9 {
-  typedef T1 Head;
-  typedef Types8<T2, T3, T4, T5, T6, T7, T8, T9> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10>
-struct Types10 {
-  typedef T1 Head;
-  typedef Types9<T2, T3, T4, T5, T6, T7, T8, T9, T10> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11>
-struct Types11 {
-  typedef T1 Head;
-  typedef Types10<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12>
-struct Types12 {
-  typedef T1 Head;
-  typedef Types11<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13>
-struct Types13 {
-  typedef T1 Head;
-  typedef Types12<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14>
-struct Types14 {
-  typedef T1 Head;
-  typedef Types13<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15>
-struct Types15 {
-  typedef T1 Head;
-  typedef Types14<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16>
-struct Types16 {
-  typedef T1 Head;
-  typedef Types15<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17>
-struct Types17 {
-  typedef T1 Head;
-  typedef Types16<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18>
-struct Types18 {
-  typedef T1 Head;
-  typedef Types17<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19>
-struct Types19 {
-  typedef T1 Head;
-  typedef Types18<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20>
-struct Types20 {
-  typedef T1 Head;
-  typedef Types19<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21>
-struct Types21 {
-  typedef T1 Head;
-  typedef Types20<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22>
-struct Types22 {
-  typedef T1 Head;
-  typedef Types21<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23>
-struct Types23 {
-  typedef T1 Head;
-  typedef Types22<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24>
-struct Types24 {
-  typedef T1 Head;
-  typedef Types23<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25>
-struct Types25 {
-  typedef T1 Head;
-  typedef Types24<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26>
-struct Types26 {
-  typedef T1 Head;
-  typedef Types25<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27>
-struct Types27 {
-  typedef T1 Head;
-  typedef Types26<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28>
-struct Types28 {
-  typedef T1 Head;
-  typedef Types27<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29>
-struct Types29 {
-  typedef T1 Head;
-  typedef Types28<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30>
-struct Types30 {
-  typedef T1 Head;
-  typedef Types29<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31>
-struct Types31 {
-  typedef T1 Head;
-  typedef Types30<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32>
-struct Types32 {
-  typedef T1 Head;
-  typedef Types31<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33>
-struct Types33 {
-  typedef T1 Head;
-  typedef Types32<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34>
-struct Types34 {
-  typedef T1 Head;
-  typedef Types33<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35>
-struct Types35 {
-  typedef T1 Head;
-  typedef Types34<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36>
-struct Types36 {
-  typedef T1 Head;
-  typedef Types35<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37>
-struct Types37 {
-  typedef T1 Head;
-  typedef Types36<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38>
-struct Types38 {
-  typedef T1 Head;
-  typedef Types37<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39>
-struct Types39 {
-  typedef T1 Head;
-  typedef Types38<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40>
-struct Types40 {
-  typedef T1 Head;
-  typedef Types39<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41>
-struct Types41 {
-  typedef T1 Head;
-  typedef Types40<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42>
-struct Types42 {
-  typedef T1 Head;
-  typedef Types41<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43>
-struct Types43 {
-  typedef T1 Head;
-  typedef Types42<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44>
-struct Types44 {
-  typedef T1 Head;
-  typedef Types43<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45>
-struct Types45 {
-  typedef T1 Head;
-  typedef Types44<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44, T45> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46>
-struct Types46 {
-  typedef T1 Head;
-  typedef Types45<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44, T45, T46> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47>
-struct Types47 {
-  typedef T1 Head;
-  typedef Types46<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44, T45, T46, T47> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47, typename T48>
-struct Types48 {
-  typedef T1 Head;
-  typedef Types47<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44, T45, T46, T47, T48> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47, typename T48, typename T49>
-struct Types49 {
-  typedef T1 Head;
-  typedef Types48<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44, T45, T46, T47, T48, T49> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47, typename T48, typename T49, typename T50>
-struct Types50 {
-  typedef T1 Head;
-  typedef Types49<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44, T45, T46, T47, T48, T49, T50> Tail;
-};
-
-
-}  // namespace internal
-
-// We don't want to require the users to write TypesN<...> directly,
-// as that would require them to count the length.  Types<...> is much
-// easier to write, but generates horrible messages when there is a
-// compiler error, as gcc insists on printing out each template
-// argument, even if it has the default value (this means Types<int>
-// will appear as Types<int, None, None, ..., None> in the compiler
-// errors).
-//
-// Our solution is to combine the best part of the two approaches: a
-// user would write Types<T1, ..., TN>, and Google Test will translate
-// that to TypesN<T1, ..., TN> internally to make error messages
-// readable.  The translation is done by the 'type' member of the
-// Types template.
-template <typename T1 = internal::None, typename T2 = internal::None,
-    typename T3 = internal::None, typename T4 = internal::None,
-    typename T5 = internal::None, typename T6 = internal::None,
-    typename T7 = internal::None, typename T8 = internal::None,
-    typename T9 = internal::None, typename T10 = internal::None,
-    typename T11 = internal::None, typename T12 = internal::None,
-    typename T13 = internal::None, typename T14 = internal::None,
-    typename T15 = internal::None, typename T16 = internal::None,
-    typename T17 = internal::None, typename T18 = internal::None,
-    typename T19 = internal::None, typename T20 = internal::None,
-    typename T21 = internal::None, typename T22 = internal::None,
-    typename T23 = internal::None, typename T24 = internal::None,
-    typename T25 = internal::None, typename T26 = internal::None,
-    typename T27 = internal::None, typename T28 = internal::None,
-    typename T29 = internal::None, typename T30 = internal::None,
-    typename T31 = internal::None, typename T32 = internal::None,
-    typename T33 = internal::None, typename T34 = internal::None,
-    typename T35 = internal::None, typename T36 = internal::None,
-    typename T37 = internal::None, typename T38 = internal::None,
-    typename T39 = internal::None, typename T40 = internal::None,
-    typename T41 = internal::None, typename T42 = internal::None,
-    typename T43 = internal::None, typename T44 = internal::None,
-    typename T45 = internal::None, typename T46 = internal::None,
-    typename T47 = internal::None, typename T48 = internal::None,
-    typename T49 = internal::None, typename T50 = internal::None>
-struct Types {
-  typedef internal::Types50<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45, T46, T47, T48, T49, T50> type;
-};
-
-template <>
-struct Types<internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types0 type;
-};
-template <typename T1>
-struct Types<T1, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types1<T1> type;
-};
-template <typename T1, typename T2>
-struct Types<T1, T2, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types2<T1, T2> type;
-};
-template <typename T1, typename T2, typename T3>
-struct Types<T1, T2, T3, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types3<T1, T2, T3> type;
-};
-template <typename T1, typename T2, typename T3, typename T4>
-struct Types<T1, T2, T3, T4, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types4<T1, T2, T3, T4> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5>
-struct Types<T1, T2, T3, T4, T5, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types5<T1, T2, T3, T4, T5> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6>
-struct Types<T1, T2, T3, T4, T5, T6, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types6<T1, T2, T3, T4, T5, T6> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7>
-struct Types<T1, T2, T3, T4, T5, T6, T7, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types7<T1, T2, T3, T4, T5, T6, T7> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types8<T1, T2, T3, T4, T5, T6, T7, T8> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types9<T1, T2, T3, T4, T5, T6, T7, T8, T9> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types10<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types11<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types12<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11,
-      T12> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types13<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types14<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types15<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types16<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types17<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types18<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types19<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types20<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types21<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types22<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types23<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types24<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types25<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types26<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25,
-      T26> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types27<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types28<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types29<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types30<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types31<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types32<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types33<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types34<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types35<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types36<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types37<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types38<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types39<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types40<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39,
-      T40> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types41<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types42<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types43<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types44<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types45<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
-    T46, internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types46<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45, T46> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
-    T46, T47, internal::None, internal::None, internal::None> {
-  typedef internal::Types47<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45, T46, T47> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47, typename T48>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
-    T46, T47, T48, internal::None, internal::None> {
-  typedef internal::Types48<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45, T46, T47, T48> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47, typename T48, typename T49>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
-    T46, T47, T48, T49, internal::None> {
-  typedef internal::Types49<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45, T46, T47, T48, T49> type;
-};
-
-namespace internal {
-
-# define GTEST_TEMPLATE_ template <typename T> class
-
-// The template "selector" struct TemplateSel<Tmpl> is used to
-// represent Tmpl, which must be a class template with one type
-// parameter, as a type.  TemplateSel<Tmpl>::Bind<T>::type is defined
-// as the type Tmpl<T>.  This allows us to actually instantiate the
-// template "selected" by TemplateSel<Tmpl>.
-//
-// This trick is necessary for simulating typedef for class templates,
-// which C++ doesn't support directly.
-template <GTEST_TEMPLATE_ Tmpl>
-struct TemplateSel {
-  template <typename T>
-  struct Bind {
-    typedef Tmpl<T> type;
-  };
-};
-
-# define GTEST_BIND_(TmplSel, T) \
-  TmplSel::template Bind<T>::type
-
-// A unique struct template used as the default value for the
-// arguments of class template Templates.  This allows us to simulate
-// variadic templates (e.g. Templates<int>, Templates<int, double>,
-// and etc), which C++ doesn't support directly.
-template <typename T>
-struct NoneT {};
-
-// The following family of struct and struct templates are used to
-// represent template lists.  In particular, TemplatesN<T1, T2, ...,
-// TN> represents a list of N templates (T1, T2, ..., and TN).  Except
-// for Templates0, every struct in the family has two member types:
-// Head for the selector of the first template in the list, and Tail
-// for the rest of the list.
-
-// The empty template list.
-struct Templates0 {};
-
-// Template lists of length 1, 2, 3, and so on.
-
-template <GTEST_TEMPLATE_ T1>
-struct Templates1 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates0 Tail;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2>
-struct Templates2 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates1<T2> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3>
-struct Templates3 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates2<T2, T3> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4>
-struct Templates4 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates3<T2, T3, T4> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5>
-struct Templates5 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates4<T2, T3, T4, T5> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6>
-struct Templates6 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates5<T2, T3, T4, T5, T6> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7>
-struct Templates7 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates6<T2, T3, T4, T5, T6, T7> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8>
-struct Templates8 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates7<T2, T3, T4, T5, T6, T7, T8> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9>
-struct Templates9 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates8<T2, T3, T4, T5, T6, T7, T8, T9> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10>
-struct Templates10 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates9<T2, T3, T4, T5, T6, T7, T8, T9, T10> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11>
-struct Templates11 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates10<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12>
-struct Templates12 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates11<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13>
-struct Templates13 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates12<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14>
-struct Templates14 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates13<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15>
-struct Templates15 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates14<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16>
-struct Templates16 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates15<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17>
-struct Templates17 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates16<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18>
-struct Templates18 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates17<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19>
-struct Templates19 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates18<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20>
-struct Templates20 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates19<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21>
-struct Templates21 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates20<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22>
-struct Templates22 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates21<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23>
-struct Templates23 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates22<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24>
-struct Templates24 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates23<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25>
-struct Templates25 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates24<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26>
-struct Templates26 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates25<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27>
-struct Templates27 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates26<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28>
-struct Templates28 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates27<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29>
-struct Templates29 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates28<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30>
-struct Templates30 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates29<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31>
-struct Templates31 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates30<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32>
-struct Templates32 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates31<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33>
-struct Templates33 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates32<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34>
-struct Templates34 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates33<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35>
-struct Templates35 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates34<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36>
-struct Templates36 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates35<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37>
-struct Templates37 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates36<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38>
-struct Templates38 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates37<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39>
-struct Templates39 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates38<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40>
-struct Templates40 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates39<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41>
-struct Templates41 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates40<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42>
-struct Templates42 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates41<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43>
-struct Templates43 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates42<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44>
-struct Templates44 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates43<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45>
-struct Templates45 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates44<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44, T45> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46>
-struct Templates46 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates45<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44, T45, T46> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47>
-struct Templates47 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates46<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44, T45, T46, T47> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47, GTEST_TEMPLATE_ T48>
-struct Templates48 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates47<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44, T45, T46, T47, T48> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47, GTEST_TEMPLATE_ T48,
-    GTEST_TEMPLATE_ T49>
-struct Templates49 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates48<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44, T45, T46, T47, T48, T49> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47, GTEST_TEMPLATE_ T48,
-    GTEST_TEMPLATE_ T49, GTEST_TEMPLATE_ T50>
-struct Templates50 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates49<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44, T45, T46, T47, T48, T49, T50> Tail;
-};
-
-
-// We don't want to require the users to write TemplatesN<...> directly,
-// as that would require them to count the length.  Templates<...> is much
-// easier to write, but generates horrible messages when there is a
-// compiler error, as gcc insists on printing out each template
-// argument, even if it has the default value (this means Templates<list>
-// will appear as Templates<list, NoneT, NoneT, ..., NoneT> in the compiler
-// errors).
-//
-// Our solution is to combine the best part of the two approaches: a
-// user would write Templates<T1, ..., TN>, and Google Test will translate
-// that to TemplatesN<T1, ..., TN> internally to make error messages
-// readable.  The translation is done by the 'type' member of the
-// Templates template.
-template <GTEST_TEMPLATE_ T1 = NoneT, GTEST_TEMPLATE_ T2 = NoneT,
-    GTEST_TEMPLATE_ T3 = NoneT, GTEST_TEMPLATE_ T4 = NoneT,
-    GTEST_TEMPLATE_ T5 = NoneT, GTEST_TEMPLATE_ T6 = NoneT,
-    GTEST_TEMPLATE_ T7 = NoneT, GTEST_TEMPLATE_ T8 = NoneT,
-    GTEST_TEMPLATE_ T9 = NoneT, GTEST_TEMPLATE_ T10 = NoneT,
-    GTEST_TEMPLATE_ T11 = NoneT, GTEST_TEMPLATE_ T12 = NoneT,
-    GTEST_TEMPLATE_ T13 = NoneT, GTEST_TEMPLATE_ T14 = NoneT,
-    GTEST_TEMPLATE_ T15 = NoneT, GTEST_TEMPLATE_ T16 = NoneT,
-    GTEST_TEMPLATE_ T17 = NoneT, GTEST_TEMPLATE_ T18 = NoneT,
-    GTEST_TEMPLATE_ T19 = NoneT, GTEST_TEMPLATE_ T20 = NoneT,
-    GTEST_TEMPLATE_ T21 = NoneT, GTEST_TEMPLATE_ T22 = NoneT,
-    GTEST_TEMPLATE_ T23 = NoneT, GTEST_TEMPLATE_ T24 = NoneT,
-    GTEST_TEMPLATE_ T25 = NoneT, GTEST_TEMPLATE_ T26 = NoneT,
-    GTEST_TEMPLATE_ T27 = NoneT, GTEST_TEMPLATE_ T28 = NoneT,
-    GTEST_TEMPLATE_ T29 = NoneT, GTEST_TEMPLATE_ T30 = NoneT,
-    GTEST_TEMPLATE_ T31 = NoneT, GTEST_TEMPLATE_ T32 = NoneT,
-    GTEST_TEMPLATE_ T33 = NoneT, GTEST_TEMPLATE_ T34 = NoneT,
-    GTEST_TEMPLATE_ T35 = NoneT, GTEST_TEMPLATE_ T36 = NoneT,
-    GTEST_TEMPLATE_ T37 = NoneT, GTEST_TEMPLATE_ T38 = NoneT,
-    GTEST_TEMPLATE_ T39 = NoneT, GTEST_TEMPLATE_ T40 = NoneT,
-    GTEST_TEMPLATE_ T41 = NoneT, GTEST_TEMPLATE_ T42 = NoneT,
-    GTEST_TEMPLATE_ T43 = NoneT, GTEST_TEMPLATE_ T44 = NoneT,
-    GTEST_TEMPLATE_ T45 = NoneT, GTEST_TEMPLATE_ T46 = NoneT,
-    GTEST_TEMPLATE_ T47 = NoneT, GTEST_TEMPLATE_ T48 = NoneT,
-    GTEST_TEMPLATE_ T49 = NoneT, GTEST_TEMPLATE_ T50 = NoneT>
-struct Templates {
-  typedef Templates50<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44, T45, T46, T47, T48, T49, T50> type;
-};
-
-template <>
-struct Templates<NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT> {
-  typedef Templates0 type;
-};
-template <GTEST_TEMPLATE_ T1>
-struct Templates<T1, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT> {
-  typedef Templates1<T1> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2>
-struct Templates<T1, T2, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT> {
-  typedef Templates2<T1, T2> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3>
-struct Templates<T1, T2, T3, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates3<T1, T2, T3> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4>
-struct Templates<T1, T2, T3, T4, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates4<T1, T2, T3, T4> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5>
-struct Templates<T1, T2, T3, T4, T5, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates5<T1, T2, T3, T4, T5> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6>
-struct Templates<T1, T2, T3, T4, T5, T6, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates6<T1, T2, T3, T4, T5, T6> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates7<T1, T2, T3, T4, T5, T6, T7> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates8<T1, T2, T3, T4, T5, T6, T7, T8> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates9<T1, T2, T3, T4, T5, T6, T7, T8, T9> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates10<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates11<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates12<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates13<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates14<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates15<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates16<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates17<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates18<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates19<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates20<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates21<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT> {
-  typedef Templates22<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT> {
-  typedef Templates23<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT> {
-  typedef Templates24<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT> {
-  typedef Templates25<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT> {
-  typedef Templates26<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT> {
-  typedef Templates27<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT> {
-  typedef Templates28<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT> {
-  typedef Templates29<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates30<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates31<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates32<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates33<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates34<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates35<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates36<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates37<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates38<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates39<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates40<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates41<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates42<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates43<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates44<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    T45, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates45<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44, T45> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    T45, T46, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates46<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44, T45, T46> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    T45, T46, T47, NoneT, NoneT, NoneT> {
-  typedef Templates47<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44, T45, T46, T47> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47, GTEST_TEMPLATE_ T48>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    T45, T46, T47, T48, NoneT, NoneT> {
-  typedef Templates48<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44, T45, T46, T47, T48> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47, GTEST_TEMPLATE_ T48,
-    GTEST_TEMPLATE_ T49>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    T45, T46, T47, T48, T49, NoneT> {
-  typedef Templates49<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44, T45, T46, T47, T48, T49> type;
-};
-
-// The TypeList template makes it possible to use either a single type
-// or a Types<...> list in TYPED_TEST_SUITE() and
-// INSTANTIATE_TYPED_TEST_SUITE_P().
-
-template <typename T>
-struct TypeList {
-  typedef Types1<T> type;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47, typename T48, typename T49, typename T50>
-struct TypeList<Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-    T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-    T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-    T44, T45, T46, T47, T48, T49, T50> > {
-  typedef typename Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45, T46, T47, T48, T49, T50>::type type;
-};
-
-#endif  // GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-type-util.h.pump b/3rdparty/gtest/include/gtest/internal/gtest-type-util.h.pump
deleted file mode 100644
index 5e31b7b3..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-type-util.h.pump
+++ /dev/null
@@ -1,302 +0,0 @@
-$$ -*- mode: c++; -*-
-$var n = 50  $$ Maximum length of type lists we want to support.
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Type utilities needed for implementing typed and type-parameterized
-// tests.  This file is generated by a SCRIPT.  DO NOT EDIT BY HAND!
-//
-// Currently we support at most $n types in a list, and at most $n
-// type-parameterized tests in one type-parameterized test suite.
-// Please contact googletestframework@googlegroups.com if you need
-// more.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
-
-#include "gtest/internal/gtest-port.h"
-
-// #ifdef __GNUC__ is too general here.  It is possible to use gcc without using
-// libstdc++ (which is where cxxabi.h comes from).
-# if GTEST_HAS_CXXABI_H_
-#  include <cxxabi.h>
-# elif defined(__HP_aCC)
-#  include <acxx_demangle.h>
-# endif  // GTEST_HASH_CXXABI_H_
-
-namespace testing {
-namespace internal {
-
-// Canonicalizes a given name with respect to the Standard C++ Library.
-// This handles removing the inline namespace within `std` that is
-// used by various standard libraries (e.g., `std::__1`).  Names outside
-// of namespace std are returned unmodified.
-inline std::string CanonicalizeForStdLibVersioning(std::string s) {
-  static const char prefix[] = "std::__";
-  if (s.compare(0, strlen(prefix), prefix) == 0) {
-    std::string::size_type end = s.find("::", strlen(prefix));
-    if (end != s.npos) {
-      // Erase everything between the initial `std` and the second `::`.
-      s.erase(strlen("std"), end - strlen("std"));
-    }
-  }
-  return s;
-}
-
-// GetTypeName<T>() returns a human-readable name of type T.
-// NB: This function is also used in Google Mock, so don't move it inside of
-// the typed-test-only section below.
-template <typename T>
-std::string GetTypeName() {
-# if GTEST_HAS_RTTI
-
-  const char* const name = typeid(T).name();
-#  if GTEST_HAS_CXXABI_H_ || defined(__HP_aCC)
-  int status = 0;
-  // gcc's implementation of typeid(T).name() mangles the type name,
-  // so we have to demangle it.
-#   if GTEST_HAS_CXXABI_H_
-  using abi::__cxa_demangle;
-#   endif  // GTEST_HAS_CXXABI_H_
-  char* const readable_name = __cxa_demangle(name, nullptr, nullptr, &status);
-  const std::string name_str(status == 0 ? readable_name : name);
-  free(readable_name);
-  return CanonicalizeForStdLibVersioning(name_str);
-#  else
-  return name;
-#  endif  // GTEST_HAS_CXXABI_H_ || __HP_aCC
-
-# else
-
-  return "<type>";
-
-# endif  // GTEST_HAS_RTTI
-}
-
-#if GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
-
-// A unique type used as the default value for the arguments of class
-// template Types.  This allows us to simulate variadic templates
-// (e.g. Types<int>, Type<int, double>, and etc), which C++ doesn't
-// support directly.
-struct None {};
-
-// The following family of struct and struct templates are used to
-// represent type lists.  In particular, TypesN<T1, T2, ..., TN>
-// represents a type list with N types (T1, T2, ..., and TN) in it.
-// Except for Types0, every struct in the family has two member types:
-// Head for the first type in the list, and Tail for the rest of the
-// list.
-
-// The empty type list.
-struct Types0 {};
-
-// Type lists of length 1, 2, 3, and so on.
-
-template <typename T1>
-struct Types1 {
-  typedef T1 Head;
-  typedef Types0 Tail;
-};
-
-$range i 2..n
-
-$for i [[
-$range j 1..i
-$range k 2..i
-template <$for j, [[typename T$j]]>
-struct Types$i {
-  typedef T1 Head;
-  typedef Types$(i-1)<$for k, [[T$k]]> Tail;
-};
-
-
-]]
-
-}  // namespace internal
-
-// We don't want to require the users to write TypesN<...> directly,
-// as that would require them to count the length.  Types<...> is much
-// easier to write, but generates horrible messages when there is a
-// compiler error, as gcc insists on printing out each template
-// argument, even if it has the default value (this means Types<int>
-// will appear as Types<int, None, None, ..., None> in the compiler
-// errors).
-//
-// Our solution is to combine the best part of the two approaches: a
-// user would write Types<T1, ..., TN>, and Google Test will translate
-// that to TypesN<T1, ..., TN> internally to make error messages
-// readable.  The translation is done by the 'type' member of the
-// Types template.
-
-$range i 1..n
-template <$for i, [[typename T$i = internal::None]]>
-struct Types {
-  typedef internal::Types$n<$for i, [[T$i]]> type;
-};
-
-template <>
-struct Types<$for i, [[internal::None]]> {
-  typedef internal::Types0 type;
-};
-
-$range i 1..n-1
-$for i [[
-$range j 1..i
-$range k i+1..n
-template <$for j, [[typename T$j]]>
-struct Types<$for j, [[T$j]]$for k[[, internal::None]]> {
-  typedef internal::Types$i<$for j, [[T$j]]> type;
-};
-
-]]
-
-namespace internal {
-
-# define GTEST_TEMPLATE_ template <typename T> class
-
-// The template "selector" struct TemplateSel<Tmpl> is used to
-// represent Tmpl, which must be a class template with one type
-// parameter, as a type.  TemplateSel<Tmpl>::Bind<T>::type is defined
-// as the type Tmpl<T>.  This allows us to actually instantiate the
-// template "selected" by TemplateSel<Tmpl>.
-//
-// This trick is necessary for simulating typedef for class templates,
-// which C++ doesn't support directly.
-template <GTEST_TEMPLATE_ Tmpl>
-struct TemplateSel {
-  template <typename T>
-  struct Bind {
-    typedef Tmpl<T> type;
-  };
-};
-
-# define GTEST_BIND_(TmplSel, T) \
-  TmplSel::template Bind<T>::type
-
-// A unique struct template used as the default value for the
-// arguments of class template Templates.  This allows us to simulate
-// variadic templates (e.g. Templates<int>, Templates<int, double>,
-// and etc), which C++ doesn't support directly.
-template <typename T>
-struct NoneT {};
-
-// The following family of struct and struct templates are used to
-// represent template lists.  In particular, TemplatesN<T1, T2, ...,
-// TN> represents a list of N templates (T1, T2, ..., and TN).  Except
-// for Templates0, every struct in the family has two member types:
-// Head for the selector of the first template in the list, and Tail
-// for the rest of the list.
-
-// The empty template list.
-struct Templates0 {};
-
-// Template lists of length 1, 2, 3, and so on.
-
-template <GTEST_TEMPLATE_ T1>
-struct Templates1 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates0 Tail;
-};
-
-$range i 2..n
-
-$for i [[
-$range j 1..i
-$range k 2..i
-template <$for j, [[GTEST_TEMPLATE_ T$j]]>
-struct Templates$i {
-  typedef TemplateSel<T1> Head;
-  typedef Templates$(i-1)<$for k, [[T$k]]> Tail;
-};
-
-
-]]
-
-// We don't want to require the users to write TemplatesN<...> directly,
-// as that would require them to count the length.  Templates<...> is much
-// easier to write, but generates horrible messages when there is a
-// compiler error, as gcc insists on printing out each template
-// argument, even if it has the default value (this means Templates<list>
-// will appear as Templates<list, NoneT, NoneT, ..., NoneT> in the compiler
-// errors).
-//
-// Our solution is to combine the best part of the two approaches: a
-// user would write Templates<T1, ..., TN>, and Google Test will translate
-// that to TemplatesN<T1, ..., TN> internally to make error messages
-// readable.  The translation is done by the 'type' member of the
-// Templates template.
-
-$range i 1..n
-template <$for i, [[GTEST_TEMPLATE_ T$i = NoneT]]>
-struct Templates {
-  typedef Templates$n<$for i, [[T$i]]> type;
-};
-
-template <>
-struct Templates<$for i, [[NoneT]]> {
-  typedef Templates0 type;
-};
-
-$range i 1..n-1
-$for i [[
-$range j 1..i
-$range k i+1..n
-template <$for j, [[GTEST_TEMPLATE_ T$j]]>
-struct Templates<$for j, [[T$j]]$for k[[, NoneT]]> {
-  typedef Templates$i<$for j, [[T$j]]> type;
-};
-
-]]
-
-// The TypeList template makes it possible to use either a single type
-// or a Types<...> list in TYPED_TEST_SUITE() and
-// INSTANTIATE_TYPED_TEST_SUITE_P().
-
-template <typename T>
-struct TypeList {
-  typedef Types1<T> type;
-};
-
-
-$range i 1..n
-template <$for i, [[typename T$i]]>
-struct TypeList<Types<$for i, [[T$i]]> > {
-  typedef typename Types<$for i, [[T$i]]>::type type;
-};
-
-#endif  // GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
diff --git a/3rdparty/gtest/samples/prime_tables.h b/3rdparty/gtest/samples/prime_tables.h
deleted file mode 100644
index 72539bf1..00000000
--- a/3rdparty/gtest/samples/prime_tables.h
+++ /dev/null
@@ -1,126 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-
-// This provides interface PrimeTable that determines whether a number is a
-// prime and determines a next prime number. This interface is used
-// in Google Test samples demonstrating use of parameterized tests.
-
-#ifndef GTEST_SAMPLES_PRIME_TABLES_H_
-#define GTEST_SAMPLES_PRIME_TABLES_H_
-
-#include <algorithm>
-
-// The prime table interface.
-class PrimeTable {
- public:
-  virtual ~PrimeTable() {}
-
-  // Returns true if and only if n is a prime number.
-  virtual bool IsPrime(int n) const = 0;
-
-  // Returns the smallest prime number greater than p; or returns -1
-  // if the next prime is beyond the capacity of the table.
-  virtual int GetNextPrime(int p) const = 0;
-};
-
-// Implementation #1 calculates the primes on-the-fly.
-class OnTheFlyPrimeTable : public PrimeTable {
- public:
-  bool IsPrime(int n) const override {
-    if (n <= 1) return false;
-
-    for (int i = 2; i*i <= n; i++) {
-      // n is divisible by an integer other than 1 and itself.
-      if ((n % i) == 0) return false;
-    }
-
-    return true;
-  }
-
-  int GetNextPrime(int p) const override {
-    for (int n = p + 1; n > 0; n++) {
-      if (IsPrime(n)) return n;
-    }
-
-    return -1;
-  }
-};
-
-// Implementation #2 pre-calculates the primes and stores the result
-// in an array.
-class PreCalculatedPrimeTable : public PrimeTable {
- public:
-  // 'max' specifies the maximum number the prime table holds.
-  explicit PreCalculatedPrimeTable(int max)
-      : is_prime_size_(max + 1), is_prime_(new bool[max + 1]) {
-    CalculatePrimesUpTo(max);
-  }
-  ~PreCalculatedPrimeTable() override { delete[] is_prime_; }
-
-  bool IsPrime(int n) const override {
-    return 0 <= n && n < is_prime_size_ && is_prime_[n];
-  }
-
-  int GetNextPrime(int p) const override {
-    for (int n = p + 1; n < is_prime_size_; n++) {
-      if (is_prime_[n]) return n;
-    }
-
-    return -1;
-  }
-
- private:
-  void CalculatePrimesUpTo(int max) {
-    ::std::fill(is_prime_, is_prime_ + is_prime_size_, true);
-    is_prime_[0] = is_prime_[1] = false;
-
-    // Checks every candidate for prime number (we know that 2 is the only even
-    // prime).
-    for (int i = 2; i*i <= max; i += i%2+1) {
-      if (!is_prime_[i]) continue;
-
-      // Marks all multiples of i (except i itself) as non-prime.
-      // We are starting here from i-th multiplier, because all smaller
-      // complex numbers were already marked.
-      for (int j = i*i; j <= max; j += i) {
-        is_prime_[j] = false;
-      }
-    }
-  }
-
-  const int is_prime_size_;
-  bool* const is_prime_;
-
-  // Disables compiler warning "assignment operator could not be generated."
-  void operator=(const PreCalculatedPrimeTable& rhs);
-};
-
-#endif  // GTEST_SAMPLES_PRIME_TABLES_H_
diff --git a/3rdparty/gtest/samples/sample1.cc b/3rdparty/gtest/samples/sample1.cc
deleted file mode 100644
index 1d427597..00000000
--- a/3rdparty/gtest/samples/sample1.cc
+++ /dev/null
@@ -1,66 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#include "sample1.h"
-
-// Returns n! (the factorial of n).  For negative n, n! is defined to be 1.
-int Factorial(int n) {
-  int result = 1;
-  for (int i = 1; i <= n; i++) {
-    result *= i;
-  }
-
-  return result;
-}
-
-// Returns true if and only if n is a prime number.
-bool IsPrime(int n) {
-  // Trivial case 1: small numbers
-  if (n <= 1) return false;
-
-  // Trivial case 2: even numbers
-  if (n % 2 == 0) return n == 2;
-
-  // Now, we have that n is odd and n >= 3.
-
-  // Try to divide n by every odd number i, starting from 3
-  for (int i = 3; ; i += 2) {
-    // We only have to try i up to the square root of n
-    if (i > n/i) break;
-
-    // Now, we have i <= n/i < n.
-    // If n is divisible by i, n is not prime.
-    if (n % i == 0) return false;
-  }
-
-  // n has no integer factor in the range (1, n), and thus is prime.
-  return true;
-}
diff --git a/3rdparty/gtest/samples/sample1.h b/3rdparty/gtest/samples/sample1.h
deleted file mode 100644
index 12e49dea..00000000
--- a/3rdparty/gtest/samples/sample1.h
+++ /dev/null
@@ -1,41 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#ifndef GTEST_SAMPLES_SAMPLE1_H_
-#define GTEST_SAMPLES_SAMPLE1_H_
-
-// Returns n! (the factorial of n).  For negative n, n! is defined to be 1.
-int Factorial(int n);
-
-// Returns true if and only if n is a prime number.
-bool IsPrime(int n);
-
-#endif  // GTEST_SAMPLES_SAMPLE1_H_
diff --git a/3rdparty/gtest/samples/sample10_unittest.cc b/3rdparty/gtest/samples/sample10_unittest.cc
deleted file mode 100644
index 36cdac22..00000000
--- a/3rdparty/gtest/samples/sample10_unittest.cc
+++ /dev/null
@@ -1,139 +0,0 @@
-// Copyright 2009 Google Inc. All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to use Google Test listener API to implement
-// a primitive leak checker.
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "gtest/gtest.h"
-using ::testing::EmptyTestEventListener;
-using ::testing::InitGoogleTest;
-using ::testing::Test;
-using ::testing::TestEventListeners;
-using ::testing::TestInfo;
-using ::testing::TestPartResult;
-using ::testing::UnitTest;
-
-namespace {
-// We will track memory used by this class.
-class Water {
- public:
-  // Normal Water declarations go here.
-
-  // operator new and operator delete help us control water allocation.
-  void* operator new(size_t allocation_size) {
-    allocated_++;
-    return malloc(allocation_size);
-  }
-
-  void operator delete(void* block, size_t /* allocation_size */) {
-    allocated_--;
-    free(block);
-  }
-
-  static int allocated() { return allocated_; }
-
- private:
-  static int allocated_;
-};
-
-int Water::allocated_ = 0;
-
-// This event listener monitors how many Water objects are created and
-// destroyed by each test, and reports a failure if a test leaks some Water
-// objects. It does this by comparing the number of live Water objects at
-// the beginning of a test and at the end of a test.
-class LeakChecker : public EmptyTestEventListener {
- private:
-  // Called before a test starts.
-  void OnTestStart(const TestInfo& /* test_info */) override {
-    initially_allocated_ = Water::allocated();
-  }
-
-  // Called after a test ends.
-  void OnTestEnd(const TestInfo& /* test_info */) override {
-    int difference = Water::allocated() - initially_allocated_;
-
-    // You can generate a failure in any event handler except
-    // OnTestPartResult. Just use an appropriate Google Test assertion to do
-    // it.
-    EXPECT_LE(difference, 0) << "Leaked " << difference << " unit(s) of Water!";
-  }
-
-  int initially_allocated_;
-};
-
-TEST(ListenersTest, DoesNotLeak) {
-  Water* water = new Water;
-  delete water;
-}
-
-// This should fail when the --check_for_leaks command line flag is
-// specified.
-TEST(ListenersTest, LeaksWater) {
-  Water* water = new Water;
-  EXPECT_TRUE(water != nullptr);
-}
-}  // namespace
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-
-  bool check_for_leaks = false;
-  if (argc > 1 && strcmp(argv[1], "--check_for_leaks") == 0 )
-    check_for_leaks = true;
-  else
-    printf("%s\n", "Run this program with --check_for_leaks to enable "
-           "custom leak checking in the tests.");
-
-  // If we are given the --check_for_leaks command line flag, installs the
-  // leak checker.
-  if (check_for_leaks) {
-    TestEventListeners& listeners = UnitTest::GetInstance()->listeners();
-
-    // Adds the leak checker to the end of the test event listener list,
-    // after the default text output printer and the default XML report
-    // generator.
-    //
-    // The order is important - it ensures that failures generated in the
-    // leak checker's OnTestEnd() method are processed by the text and XML
-    // printers *before* their OnTestEnd() methods are called, such that
-    // they are attributed to the right test. Remember that a listener
-    // receives an OnXyzStart event *after* listeners preceding it in the
-    // list received that event, and receives an OnXyzEnd event *before*
-    // listeners preceding it.
-    //
-    // We don't need to worry about deleting the new listener later, as
-    // Google Test will do it.
-    listeners.Append(new LeakChecker);
-  }
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/samples/sample1_unittest.cc b/3rdparty/gtest/samples/sample1_unittest.cc
deleted file mode 100644
index cb08b61a..00000000
--- a/3rdparty/gtest/samples/sample1_unittest.cc
+++ /dev/null
@@ -1,151 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-// This sample shows how to write a simple unit test for a function,
-// using Google C++ testing framework.
-//
-// Writing a unit test using Google C++ testing framework is easy as 1-2-3:
-
-
-// Step 1. Include necessary header files such that the stuff your
-// test logic needs is declared.
-//
-// Don't forget gtest.h, which declares the testing framework.
-
-#include <limits.h>
-#include "sample1.h"
-#include "gtest/gtest.h"
-namespace {
-
-// Step 2. Use the TEST macro to define your tests.
-//
-// TEST has two parameters: the test case name and the test name.
-// After using the macro, you should define your test logic between a
-// pair of braces.  You can use a bunch of macros to indicate the
-// success or failure of a test.  EXPECT_TRUE and EXPECT_EQ are
-// examples of such macros.  For a complete list, see gtest.h.
-//
-// <TechnicalDetails>
-//
-// In Google Test, tests are grouped into test cases.  This is how we
-// keep test code organized.  You should put logically related tests
-// into the same test case.
-//
-// The test case name and the test name should both be valid C++
-// identifiers.  And you should not use underscore (_) in the names.
-//
-// Google Test guarantees that each test you define is run exactly
-// once, but it makes no guarantee on the order the tests are
-// executed.  Therefore, you should write your tests in such a way
-// that their results don't depend on their order.
-//
-// </TechnicalDetails>
-
-
-// Tests Factorial().
-
-// Tests factorial of negative numbers.
-TEST(FactorialTest, Negative) {
-  // This test is named "Negative", and belongs to the "FactorialTest"
-  // test case.
-  EXPECT_EQ(1, Factorial(-5));
-  EXPECT_EQ(1, Factorial(-1));
-  EXPECT_GT(Factorial(-10), 0);
-
-  // <TechnicalDetails>
-  //
-  // EXPECT_EQ(expected, actual) is the same as
-  //
-  //   EXPECT_TRUE((expected) == (actual))
-  //
-  // except that it will print both the expected value and the actual
-  // value when the assertion fails.  This is very helpful for
-  // debugging.  Therefore in this case EXPECT_EQ is preferred.
-  //
-  // On the other hand, EXPECT_TRUE accepts any Boolean expression,
-  // and is thus more general.
-  //
-  // </TechnicalDetails>
-}
-
-// Tests factorial of 0.
-TEST(FactorialTest, Zero) {
-  EXPECT_EQ(1, Factorial(0));
-}
-
-// Tests factorial of positive numbers.
-TEST(FactorialTest, Positive) {
-  EXPECT_EQ(1, Factorial(1));
-  EXPECT_EQ(2, Factorial(2));
-  EXPECT_EQ(6, Factorial(3));
-  EXPECT_EQ(40320, Factorial(8));
-}
-
-
-// Tests IsPrime()
-
-// Tests negative input.
-TEST(IsPrimeTest, Negative) {
-  // This test belongs to the IsPrimeTest test case.
-
-  EXPECT_FALSE(IsPrime(-1));
-  EXPECT_FALSE(IsPrime(-2));
-  EXPECT_FALSE(IsPrime(INT_MIN));
-}
-
-// Tests some trivial cases.
-TEST(IsPrimeTest, Trivial) {
-  EXPECT_FALSE(IsPrime(0));
-  EXPECT_FALSE(IsPrime(1));
-  EXPECT_TRUE(IsPrime(2));
-  EXPECT_TRUE(IsPrime(3));
-}
-
-// Tests positive input.
-TEST(IsPrimeTest, Positive) {
-  EXPECT_FALSE(IsPrime(4));
-  EXPECT_TRUE(IsPrime(5));
-  EXPECT_FALSE(IsPrime(6));
-  EXPECT_TRUE(IsPrime(23));
-}
-}  // namespace
-
-// Step 3. Call RUN_ALL_TESTS() in main().
-//
-// We do this by linking in src/gtest_main.cc file, which consists of
-// a main() function which calls RUN_ALL_TESTS() for us.
-//
-// This runs all the tests you've defined, prints the result, and
-// returns 0 if successful, or 1 otherwise.
-//
-// Did you notice that we didn't register the tests?  The
-// RUN_ALL_TESTS() macro magically knows about all the tests we
-// defined.  Isn't this convenient?
diff --git a/3rdparty/gtest/samples/sample2.cc b/3rdparty/gtest/samples/sample2.cc
deleted file mode 100644
index d8e87239..00000000
--- a/3rdparty/gtest/samples/sample2.cc
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#include "sample2.h"
-
-#include <string.h>
-
-// Clones a 0-terminated C string, allocating memory using new.
-const char* MyString::CloneCString(const char* a_c_string) {
-  if (a_c_string == nullptr) return nullptr;
-
-  const size_t len = strlen(a_c_string);
-  char* const clone = new char[ len + 1 ];
-  memcpy(clone, a_c_string, len + 1);
-
-  return clone;
-}
-
-// Sets the 0-terminated C string this MyString object
-// represents.
-void MyString::Set(const char* a_c_string) {
-  // Makes sure this works when c_string == c_string_
-  const char* const temp = MyString::CloneCString(a_c_string);
-  delete[] c_string_;
-  c_string_ = temp;
-}
diff --git a/3rdparty/gtest/samples/sample2.h b/3rdparty/gtest/samples/sample2.h
deleted file mode 100644
index e9a5a705..00000000
--- a/3rdparty/gtest/samples/sample2.h
+++ /dev/null
@@ -1,81 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#ifndef GTEST_SAMPLES_SAMPLE2_H_
-#define GTEST_SAMPLES_SAMPLE2_H_
-
-#include <string.h>
-
-
-// A simple string class.
-class MyString {
- private:
-  const char* c_string_;
-  const MyString& operator=(const MyString& rhs);
-
- public:
-  // Clones a 0-terminated C string, allocating memory using new.
-  static const char* CloneCString(const char* a_c_string);
-
-  ////////////////////////////////////////////////////////////
-  //
-  // C'tors
-
-  // The default c'tor constructs a NULL string.
-  MyString() : c_string_(nullptr) {}
-
-  // Constructs a MyString by cloning a 0-terminated C string.
-  explicit MyString(const char* a_c_string) : c_string_(nullptr) {
-    Set(a_c_string);
-  }
-
-  // Copy c'tor
-  MyString(const MyString& string) : c_string_(nullptr) {
-    Set(string.c_string_);
-  }
-
-  ////////////////////////////////////////////////////////////
-  //
-  // D'tor.  MyString is intended to be a final class, so the d'tor
-  // doesn't need to be virtual.
-  ~MyString() { delete[] c_string_; }
-
-  // Gets the 0-terminated C string this MyString object represents.
-  const char* c_string() const { return c_string_; }
-
-  size_t Length() const { return c_string_ == nullptr ? 0 : strlen(c_string_); }
-
-  // Sets the 0-terminated C string this MyString object represents.
-  void Set(const char* c_string);
-};
-
-
-#endif  // GTEST_SAMPLES_SAMPLE2_H_
diff --git a/3rdparty/gtest/samples/sample2_unittest.cc b/3rdparty/gtest/samples/sample2_unittest.cc
deleted file mode 100644
index 41e31c17..00000000
--- a/3rdparty/gtest/samples/sample2_unittest.cc
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-// This sample shows how to write a more complex unit test for a class
-// that has multiple member functions.
-//
-// Usually, it's a good idea to have one test for each method in your
-// class.  You don't have to do that exactly, but it helps to keep
-// your tests organized.  You may also throw in additional tests as
-// needed.
-
-#include "sample2.h"
-#include "gtest/gtest.h"
-namespace {
-// In this example, we test the MyString class (a simple string).
-
-// Tests the default c'tor.
-TEST(MyString, DefaultConstructor) {
-  const MyString s;
-
-  // Asserts that s.c_string() returns NULL.
-  //
-  // <TechnicalDetails>
-  //
-  // If we write NULL instead of
-  //
-  //   static_cast<const char *>(NULL)
-  //
-  // in this assertion, it will generate a warning on gcc 3.4.  The
-  // reason is that EXPECT_EQ needs to know the types of its
-  // arguments in order to print them when it fails.  Since NULL is
-  // #defined as 0, the compiler will use the formatter function for
-  // int to print it.  However, gcc thinks that NULL should be used as
-  // a pointer, not an int, and therefore complains.
-  //
-  // The root of the problem is C++'s lack of distinction between the
-  // integer number 0 and the null pointer constant.  Unfortunately,
-  // we have to live with this fact.
-  //
-  // </TechnicalDetails>
-  EXPECT_STREQ(nullptr, s.c_string());
-
-  EXPECT_EQ(0u, s.Length());
-}
-
-const char kHelloString[] = "Hello, world!";
-
-// Tests the c'tor that accepts a C string.
-TEST(MyString, ConstructorFromCString) {
-  const MyString s(kHelloString);
-  EXPECT_EQ(0, strcmp(s.c_string(), kHelloString));
-  EXPECT_EQ(sizeof(kHelloString)/sizeof(kHelloString[0]) - 1,
-            s.Length());
-}
-
-// Tests the copy c'tor.
-TEST(MyString, CopyConstructor) {
-  const MyString s1(kHelloString);
-  const MyString s2 = s1;
-  EXPECT_EQ(0, strcmp(s2.c_string(), kHelloString));
-}
-
-// Tests the Set method.
-TEST(MyString, Set) {
-  MyString s;
-
-  s.Set(kHelloString);
-  EXPECT_EQ(0, strcmp(s.c_string(), kHelloString));
-
-  // Set should work when the input pointer is the same as the one
-  // already in the MyString object.
-  s.Set(s.c_string());
-  EXPECT_EQ(0, strcmp(s.c_string(), kHelloString));
-
-  // Can we set the MyString to NULL?
-  s.Set(nullptr);
-  EXPECT_STREQ(nullptr, s.c_string());
-}
-}  // namespace
diff --git a/3rdparty/gtest/samples/sample3-inl.h b/3rdparty/gtest/samples/sample3-inl.h
deleted file mode 100644
index 80ba6b92..00000000
--- a/3rdparty/gtest/samples/sample3-inl.h
+++ /dev/null
@@ -1,172 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#ifndef GTEST_SAMPLES_SAMPLE3_INL_H_
-#define GTEST_SAMPLES_SAMPLE3_INL_H_
-
-#include <stddef.h>
-
-
-// Queue is a simple queue implemented as a singled-linked list.
-//
-// The element type must support copy constructor.
-template <typename E>  // E is the element type
-class Queue;
-
-// QueueNode is a node in a Queue, which consists of an element of
-// type E and a pointer to the next node.
-template <typename E>  // E is the element type
-class QueueNode {
-  friend class Queue<E>;
-
- public:
-  // Gets the element in this node.
-  const E& element() const { return element_; }
-
-  // Gets the next node in the queue.
-  QueueNode* next() { return next_; }
-  const QueueNode* next() const { return next_; }
-
- private:
-  // Creates a node with a given element value.  The next pointer is
-  // set to NULL.
-  explicit QueueNode(const E& an_element)
-      : element_(an_element), next_(nullptr) {}
-
-  // We disable the default assignment operator and copy c'tor.
-  const QueueNode& operator = (const QueueNode&);
-  QueueNode(const QueueNode&);
-
-  E element_;
-  QueueNode* next_;
-};
-
-template <typename E>  // E is the element type.
-class Queue {
- public:
-  // Creates an empty queue.
-  Queue() : head_(nullptr), last_(nullptr), size_(0) {}
-
-  // D'tor.  Clears the queue.
-  ~Queue() { Clear(); }
-
-  // Clears the queue.
-  void Clear() {
-    if (size_ > 0) {
-      // 1. Deletes every node.
-      QueueNode<E>* node = head_;
-      QueueNode<E>* next = node->next();
-      for (; ;) {
-        delete node;
-        node = next;
-        if (node == nullptr) break;
-        next = node->next();
-      }
-
-      // 2. Resets the member variables.
-      head_ = last_ = nullptr;
-      size_ = 0;
-    }
-  }
-
-  // Gets the number of elements.
-  size_t Size() const { return size_; }
-
-  // Gets the first element of the queue, or NULL if the queue is empty.
-  QueueNode<E>* Head() { return head_; }
-  const QueueNode<E>* Head() const { return head_; }
-
-  // Gets the last element of the queue, or NULL if the queue is empty.
-  QueueNode<E>* Last() { return last_; }
-  const QueueNode<E>* Last() const { return last_; }
-
-  // Adds an element to the end of the queue.  A copy of the element is
-  // created using the copy constructor, and then stored in the queue.
-  // Changes made to the element in the queue doesn't affect the source
-  // object, and vice versa.
-  void Enqueue(const E& element) {
-    QueueNode<E>* new_node = new QueueNode<E>(element);
-
-    if (size_ == 0) {
-      head_ = last_ = new_node;
-      size_ = 1;
-    } else {
-      last_->next_ = new_node;
-      last_ = new_node;
-      size_++;
-    }
-  }
-
-  // Removes the head of the queue and returns it.  Returns NULL if
-  // the queue is empty.
-  E* Dequeue() {
-    if (size_ == 0) {
-      return nullptr;
-    }
-
-    const QueueNode<E>* const old_head = head_;
-    head_ = head_->next_;
-    size_--;
-    if (size_ == 0) {
-      last_ = nullptr;
-    }
-
-    E* element = new E(old_head->element());
-    delete old_head;
-
-    return element;
-  }
-
-  // Applies a function/functor on each element of the queue, and
-  // returns the result in a new queue.  The original queue is not
-  // affected.
-  template <typename F>
-  Queue* Map(F function) const {
-    Queue* new_queue = new Queue();
-    for (const QueueNode<E>* node = head_; node != nullptr;
-         node = node->next_) {
-      new_queue->Enqueue(function(node->element()));
-    }
-
-    return new_queue;
-  }
-
- private:
-  QueueNode<E>* head_;  // The first node of the queue.
-  QueueNode<E>* last_;  // The last node of the queue.
-  size_t size_;  // The number of elements in the queue.
-
-  // We disallow copying a queue.
-  Queue(const Queue&);
-  const Queue& operator = (const Queue&);
-};
-
-#endif  // GTEST_SAMPLES_SAMPLE3_INL_H_
diff --git a/3rdparty/gtest/samples/sample3_unittest.cc b/3rdparty/gtest/samples/sample3_unittest.cc
deleted file mode 100644
index b19416d5..00000000
--- a/3rdparty/gtest/samples/sample3_unittest.cc
+++ /dev/null
@@ -1,149 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-// In this example, we use a more advanced feature of Google Test called
-// test fixture.
-//
-// A test fixture is a place to hold objects and functions shared by
-// all tests in a test case.  Using a test fixture avoids duplicating
-// the test code necessary to initialize and cleanup those common
-// objects for each test.  It is also useful for defining sub-routines
-// that your tests need to invoke a lot.
-//
-// <TechnicalDetails>
-//
-// The tests share the test fixture in the sense of code sharing, not
-// data sharing.  Each test is given its own fresh copy of the
-// fixture.  You cannot expect the data modified by one test to be
-// passed on to another test, which is a bad idea.
-//
-// The reason for this design is that tests should be independent and
-// repeatable.  In particular, a test should not fail as the result of
-// another test's failure.  If one test depends on info produced by
-// another test, then the two tests should really be one big test.
-//
-// The macros for indicating the success/failure of a test
-// (EXPECT_TRUE, FAIL, etc) need to know what the current test is
-// (when Google Test prints the test result, it tells you which test
-// each failure belongs to).  Technically, these macros invoke a
-// member function of the Test class.  Therefore, you cannot use them
-// in a global function.  That's why you should put test sub-routines
-// in a test fixture.
-//
-// </TechnicalDetails>
-
-#include "sample3-inl.h"
-#include "gtest/gtest.h"
-namespace {
-// To use a test fixture, derive a class from testing::Test.
-class QueueTestSmpl3 : public testing::Test {
- protected:  // You should make the members protected s.t. they can be
-             // accessed from sub-classes.
-
-  // virtual void SetUp() will be called before each test is run.  You
-  // should define it if you need to initialize the variables.
-  // Otherwise, this can be skipped.
-  void SetUp() override {
-    q1_.Enqueue(1);
-    q2_.Enqueue(2);
-    q2_.Enqueue(3);
-  }
-
-  // virtual void TearDown() will be called after each test is run.
-  // You should define it if there is cleanup work to do.  Otherwise,
-  // you don't have to provide it.
-  //
-  // virtual void TearDown() {
-  // }
-
-  // A helper function that some test uses.
-  static int Double(int n) {
-    return 2*n;
-  }
-
-  // A helper function for testing Queue::Map().
-  void MapTester(const Queue<int> * q) {
-    // Creates a new queue, where each element is twice as big as the
-    // corresponding one in q.
-    const Queue<int> * const new_q = q->Map(Double);
-
-    // Verifies that the new queue has the same size as q.
-    ASSERT_EQ(q->Size(), new_q->Size());
-
-    // Verifies the relationship between the elements of the two queues.
-    for (const QueueNode<int>*n1 = q->Head(), *n2 = new_q->Head();
-         n1 != nullptr; n1 = n1->next(), n2 = n2->next()) {
-      EXPECT_EQ(2 * n1->element(), n2->element());
-    }
-
-    delete new_q;
-  }
-
-  // Declares the variables your tests want to use.
-  Queue<int> q0_;
-  Queue<int> q1_;
-  Queue<int> q2_;
-};
-
-// When you have a test fixture, you define a test using TEST_F
-// instead of TEST.
-
-// Tests the default c'tor.
-TEST_F(QueueTestSmpl3, DefaultConstructor) {
-  // You can access data in the test fixture here.
-  EXPECT_EQ(0u, q0_.Size());
-}
-
-// Tests Dequeue().
-TEST_F(QueueTestSmpl3, Dequeue) {
-  int * n = q0_.Dequeue();
-  EXPECT_TRUE(n == nullptr);
-
-  n = q1_.Dequeue();
-  ASSERT_TRUE(n != nullptr);
-  EXPECT_EQ(1, *n);
-  EXPECT_EQ(0u, q1_.Size());
-  delete n;
-
-  n = q2_.Dequeue();
-  ASSERT_TRUE(n != nullptr);
-  EXPECT_EQ(2, *n);
-  EXPECT_EQ(1u, q2_.Size());
-  delete n;
-}
-
-// Tests the Queue::Map() function.
-TEST_F(QueueTestSmpl3, Map) {
-  MapTester(&q0_);
-  MapTester(&q1_);
-  MapTester(&q2_);
-}
-}  // namespace
diff --git a/3rdparty/gtest/samples/sample4.cc b/3rdparty/gtest/samples/sample4.cc
deleted file mode 100644
index b0ee6093..00000000
--- a/3rdparty/gtest/samples/sample4.cc
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#include <stdio.h>
-
-#include "sample4.h"
-
-// Returns the current counter value, and increments it.
-int Counter::Increment() {
-  return counter_++;
-}
-
-// Returns the current counter value, and decrements it.
-// counter can not be less than 0, return 0 in this case
-int Counter::Decrement() {
-  if (counter_ == 0) {
-    return counter_;
-  } else  {
-    return counter_--;
-  }
-}
-
-// Prints the current counter value to STDOUT.
-void Counter::Print() const {
-  printf("%d", counter_);
-}
diff --git a/3rdparty/gtest/samples/sample4.h b/3rdparty/gtest/samples/sample4.h
deleted file mode 100644
index e256f406..00000000
--- a/3rdparty/gtest/samples/sample4.h
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-#ifndef GTEST_SAMPLES_SAMPLE4_H_
-#define GTEST_SAMPLES_SAMPLE4_H_
-
-// A simple monotonic counter.
-class Counter {
- private:
-  int counter_;
-
- public:
-  // Creates a counter that starts at 0.
-  Counter() : counter_(0) {}
-
-  // Returns the current counter value, and increments it.
-  int Increment();
-
-  // Returns the current counter value, and decrements it.
-  int Decrement();
-
-  // Prints the current counter value to STDOUT.
-  void Print() const;
-};
-
-#endif  // GTEST_SAMPLES_SAMPLE4_H_
diff --git a/3rdparty/gtest/samples/sample4_unittest.cc b/3rdparty/gtest/samples/sample4_unittest.cc
deleted file mode 100644
index d5144c0d..00000000
--- a/3rdparty/gtest/samples/sample4_unittest.cc
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "sample4.h"
-#include "gtest/gtest.h"
-
-namespace {
-// Tests the Increment() method.
-
-TEST(Counter, Increment) {
-  Counter c;
-
-  // Test that counter 0 returns 0
-  EXPECT_EQ(0, c.Decrement());
-
-  // EXPECT_EQ() evaluates its arguments exactly once, so they
-  // can have side effects.
-
-  EXPECT_EQ(0, c.Increment());
-  EXPECT_EQ(1, c.Increment());
-  EXPECT_EQ(2, c.Increment());
-
-  EXPECT_EQ(3, c.Decrement());
-}
-
-}  // namespace
diff --git a/3rdparty/gtest/samples/sample5_unittest.cc b/3rdparty/gtest/samples/sample5_unittest.cc
deleted file mode 100644
index 0a21dd21..00000000
--- a/3rdparty/gtest/samples/sample5_unittest.cc
+++ /dev/null
@@ -1,196 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample teaches how to reuse a test fixture in multiple test
-// cases by deriving sub-fixtures from it.
-//
-// When you define a test fixture, you specify the name of the test
-// case that will use this fixture.  Therefore, a test fixture can
-// be used by only one test case.
-//
-// Sometimes, more than one test cases may want to use the same or
-// slightly different test fixtures.  For example, you may want to
-// make sure that all tests for a GUI library don't leak important
-// system resources like fonts and brushes.  In Google Test, you do
-// this by putting the shared logic in a super (as in "super class")
-// test fixture, and then have each test case use a fixture derived
-// from this super fixture.
-
-#include <limits.h>
-#include <time.h>
-#include "gtest/gtest.h"
-#include "sample1.h"
-#include "sample3-inl.h"
-namespace {
-// In this sample, we want to ensure that every test finishes within
-// ~5 seconds.  If a test takes longer to run, we consider it a
-// failure.
-//
-// We put the code for timing a test in a test fixture called
-// "QuickTest".  QuickTest is intended to be the super fixture that
-// other fixtures derive from, therefore there is no test case with
-// the name "QuickTest".  This is OK.
-//
-// Later, we will derive multiple test fixtures from QuickTest.
-class QuickTest : public testing::Test {
- protected:
-  // Remember that SetUp() is run immediately before a test starts.
-  // This is a good place to record the start time.
-  void SetUp() override { start_time_ = time(nullptr); }
-
-  // TearDown() is invoked immediately after a test finishes.  Here we
-  // check if the test was too slow.
-  void TearDown() override {
-    // Gets the time when the test finishes
-    const time_t end_time = time(nullptr);
-
-    // Asserts that the test took no more than ~5 seconds.  Did you
-    // know that you can use assertions in SetUp() and TearDown() as
-    // well?
-    EXPECT_TRUE(end_time - start_time_ <= 5) << "The test took too long.";
-  }
-
-  // The UTC time (in seconds) when the test starts
-  time_t start_time_;
-};
-
-
-// We derive a fixture named IntegerFunctionTest from the QuickTest
-// fixture.  All tests using this fixture will be automatically
-// required to be quick.
-class IntegerFunctionTest : public QuickTest {
-  // We don't need any more logic than already in the QuickTest fixture.
-  // Therefore the body is empty.
-};
-
-
-// Now we can write tests in the IntegerFunctionTest test case.
-
-// Tests Factorial()
-TEST_F(IntegerFunctionTest, Factorial) {
-  // Tests factorial of negative numbers.
-  EXPECT_EQ(1, Factorial(-5));
-  EXPECT_EQ(1, Factorial(-1));
-  EXPECT_GT(Factorial(-10), 0);
-
-  // Tests factorial of 0.
-  EXPECT_EQ(1, Factorial(0));
-
-  // Tests factorial of positive numbers.
-  EXPECT_EQ(1, Factorial(1));
-  EXPECT_EQ(2, Factorial(2));
-  EXPECT_EQ(6, Factorial(3));
-  EXPECT_EQ(40320, Factorial(8));
-}
-
-
-// Tests IsPrime()
-TEST_F(IntegerFunctionTest, IsPrime) {
-  // Tests negative input.
-  EXPECT_FALSE(IsPrime(-1));
-  EXPECT_FALSE(IsPrime(-2));
-  EXPECT_FALSE(IsPrime(INT_MIN));
-
-  // Tests some trivial cases.
-  EXPECT_FALSE(IsPrime(0));
-  EXPECT_FALSE(IsPrime(1));
-  EXPECT_TRUE(IsPrime(2));
-  EXPECT_TRUE(IsPrime(3));
-
-  // Tests positive input.
-  EXPECT_FALSE(IsPrime(4));
-  EXPECT_TRUE(IsPrime(5));
-  EXPECT_FALSE(IsPrime(6));
-  EXPECT_TRUE(IsPrime(23));
-}
-
-
-// The next test case (named "QueueTest") also needs to be quick, so
-// we derive another fixture from QuickTest.
-//
-// The QueueTest test fixture has some logic and shared objects in
-// addition to what's in QuickTest already.  We define the additional
-// stuff inside the body of the test fixture, as usual.
-class QueueTest : public QuickTest {
- protected:
-  void SetUp() override {
-    // First, we need to set up the super fixture (QuickTest).
-    QuickTest::SetUp();
-
-    // Second, some additional setup for this fixture.
-    q1_.Enqueue(1);
-    q2_.Enqueue(2);
-    q2_.Enqueue(3);
-  }
-
-  // By default, TearDown() inherits the behavior of
-  // QuickTest::TearDown().  As we have no additional cleaning work
-  // for QueueTest, we omit it here.
-  //
-  // virtual void TearDown() {
-  //   QuickTest::TearDown();
-  // }
-
-  Queue<int> q0_;
-  Queue<int> q1_;
-  Queue<int> q2_;
-};
-
-
-// Now, let's write tests using the QueueTest fixture.
-
-// Tests the default constructor.
-TEST_F(QueueTest, DefaultConstructor) {
-  EXPECT_EQ(0u, q0_.Size());
-}
-
-// Tests Dequeue().
-TEST_F(QueueTest, Dequeue) {
-  int* n = q0_.Dequeue();
-  EXPECT_TRUE(n == nullptr);
-
-  n = q1_.Dequeue();
-  EXPECT_TRUE(n != nullptr);
-  EXPECT_EQ(1, *n);
-  EXPECT_EQ(0u, q1_.Size());
-  delete n;
-
-  n = q2_.Dequeue();
-  EXPECT_TRUE(n != nullptr);
-  EXPECT_EQ(2, *n);
-  EXPECT_EQ(1u, q2_.Size());
-  delete n;
-}
-}  // namespace
-// If necessary, you can derive further test fixtures from a derived
-// fixture itself.  For example, you can derive another fixture from
-// QueueTest.  Google Test imposes no limit on how deep the hierarchy
-// can be.  In practice, however, you probably don't want it to be too
-// deep as to be confusing.
diff --git a/3rdparty/gtest/samples/sample6_unittest.cc b/3rdparty/gtest/samples/sample6_unittest.cc
deleted file mode 100644
index 0266e27e..00000000
--- a/3rdparty/gtest/samples/sample6_unittest.cc
+++ /dev/null
@@ -1,224 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to test common properties of multiple
-// implementations of the same interface (aka interface tests).
-
-// The interface and its implementations are in this header.
-#include "prime_tables.h"
-
-#include "gtest/gtest.h"
-namespace {
-// First, we define some factory functions for creating instances of
-// the implementations.  You may be able to skip this step if all your
-// implementations can be constructed the same way.
-
-template <class T>
-PrimeTable* CreatePrimeTable();
-
-template <>
-PrimeTable* CreatePrimeTable<OnTheFlyPrimeTable>() {
-  return new OnTheFlyPrimeTable;
-}
-
-template <>
-PrimeTable* CreatePrimeTable<PreCalculatedPrimeTable>() {
-  return new PreCalculatedPrimeTable(10000);
-}
-
-// Then we define a test fixture class template.
-template <class T>
-class PrimeTableTest : public testing::Test {
- protected:
-  // The ctor calls the factory function to create a prime table
-  // implemented by T.
-  PrimeTableTest() : table_(CreatePrimeTable<T>()) {}
-
-  ~PrimeTableTest() override { delete table_; }
-
-  // Note that we test an implementation via the base interface
-  // instead of the actual implementation class.  This is important
-  // for keeping the tests close to the real world scenario, where the
-  // implementation is invoked via the base interface.  It avoids
-  // got-yas where the implementation class has a method that shadows
-  // a method with the same name (but slightly different argument
-  // types) in the base interface, for example.
-  PrimeTable* const table_;
-};
-
-#if GTEST_HAS_TYPED_TEST
-
-using testing::Types;
-
-// Google Test offers two ways for reusing tests for different types.
-// The first is called "typed tests".  You should use it if you
-// already know *all* the types you are gonna exercise when you write
-// the tests.
-
-// To write a typed test case, first use
-//
-//   TYPED_TEST_SUITE(TestCaseName, TypeList);
-//
-// to declare it and specify the type parameters.  As with TEST_F,
-// TestCaseName must match the test fixture name.
-
-// The list of types we want to test.
-typedef Types<OnTheFlyPrimeTable, PreCalculatedPrimeTable> Implementations;
-
-TYPED_TEST_SUITE(PrimeTableTest, Implementations);
-
-// Then use TYPED_TEST(TestCaseName, TestName) to define a typed test,
-// similar to TEST_F.
-TYPED_TEST(PrimeTableTest, ReturnsFalseForNonPrimes) {
-  // Inside the test body, you can refer to the type parameter by
-  // TypeParam, and refer to the fixture class by TestFixture.  We
-  // don't need them in this example.
-
-  // Since we are in the template world, C++ requires explicitly
-  // writing 'this->' when referring to members of the fixture class.
-  // This is something you have to learn to live with.
-  EXPECT_FALSE(this->table_->IsPrime(-5));
-  EXPECT_FALSE(this->table_->IsPrime(0));
-  EXPECT_FALSE(this->table_->IsPrime(1));
-  EXPECT_FALSE(this->table_->IsPrime(4));
-  EXPECT_FALSE(this->table_->IsPrime(6));
-  EXPECT_FALSE(this->table_->IsPrime(100));
-}
-
-TYPED_TEST(PrimeTableTest, ReturnsTrueForPrimes) {
-  EXPECT_TRUE(this->table_->IsPrime(2));
-  EXPECT_TRUE(this->table_->IsPrime(3));
-  EXPECT_TRUE(this->table_->IsPrime(5));
-  EXPECT_TRUE(this->table_->IsPrime(7));
-  EXPECT_TRUE(this->table_->IsPrime(11));
-  EXPECT_TRUE(this->table_->IsPrime(131));
-}
-
-TYPED_TEST(PrimeTableTest, CanGetNextPrime) {
-  EXPECT_EQ(2, this->table_->GetNextPrime(0));
-  EXPECT_EQ(3, this->table_->GetNextPrime(2));
-  EXPECT_EQ(5, this->table_->GetNextPrime(3));
-  EXPECT_EQ(7, this->table_->GetNextPrime(5));
-  EXPECT_EQ(11, this->table_->GetNextPrime(7));
-  EXPECT_EQ(131, this->table_->GetNextPrime(128));
-}
-
-// That's it!  Google Test will repeat each TYPED_TEST for each type
-// in the type list specified in TYPED_TEST_SUITE.  Sit back and be
-// happy that you don't have to define them multiple times.
-
-#endif  // GTEST_HAS_TYPED_TEST
-
-#if GTEST_HAS_TYPED_TEST_P
-
-using testing::Types;
-
-// Sometimes, however, you don't yet know all the types that you want
-// to test when you write the tests.  For example, if you are the
-// author of an interface and expect other people to implement it, you
-// might want to write a set of tests to make sure each implementation
-// conforms to some basic requirements, but you don't know what
-// implementations will be written in the future.
-//
-// How can you write the tests without committing to the type
-// parameters?  That's what "type-parameterized tests" can do for you.
-// It is a bit more involved than typed tests, but in return you get a
-// test pattern that can be reused in many contexts, which is a big
-// win.  Here's how you do it:
-
-// First, define a test fixture class template.  Here we just reuse
-// the PrimeTableTest fixture defined earlier:
-
-template <class T>
-class PrimeTableTest2 : public PrimeTableTest<T> {
-};
-
-// Then, declare the test case.  The argument is the name of the test
-// fixture, and also the name of the test case (as usual).  The _P
-// suffix is for "parameterized" or "pattern".
-TYPED_TEST_SUITE_P(PrimeTableTest2);
-
-// Next, use TYPED_TEST_P(TestCaseName, TestName) to define a test,
-// similar to what you do with TEST_F.
-TYPED_TEST_P(PrimeTableTest2, ReturnsFalseForNonPrimes) {
-  EXPECT_FALSE(this->table_->IsPrime(-5));
-  EXPECT_FALSE(this->table_->IsPrime(0));
-  EXPECT_FALSE(this->table_->IsPrime(1));
-  EXPECT_FALSE(this->table_->IsPrime(4));
-  EXPECT_FALSE(this->table_->IsPrime(6));
-  EXPECT_FALSE(this->table_->IsPrime(100));
-}
-
-TYPED_TEST_P(PrimeTableTest2, ReturnsTrueForPrimes) {
-  EXPECT_TRUE(this->table_->IsPrime(2));
-  EXPECT_TRUE(this->table_->IsPrime(3));
-  EXPECT_TRUE(this->table_->IsPrime(5));
-  EXPECT_TRUE(this->table_->IsPrime(7));
-  EXPECT_TRUE(this->table_->IsPrime(11));
-  EXPECT_TRUE(this->table_->IsPrime(131));
-}
-
-TYPED_TEST_P(PrimeTableTest2, CanGetNextPrime) {
-  EXPECT_EQ(2, this->table_->GetNextPrime(0));
-  EXPECT_EQ(3, this->table_->GetNextPrime(2));
-  EXPECT_EQ(5, this->table_->GetNextPrime(3));
-  EXPECT_EQ(7, this->table_->GetNextPrime(5));
-  EXPECT_EQ(11, this->table_->GetNextPrime(7));
-  EXPECT_EQ(131, this->table_->GetNextPrime(128));
-}
-
-// Type-parameterized tests involve one extra step: you have to
-// enumerate the tests you defined:
-REGISTER_TYPED_TEST_SUITE_P(
-    PrimeTableTest2,  // The first argument is the test case name.
-    // The rest of the arguments are the test names.
-    ReturnsFalseForNonPrimes, ReturnsTrueForPrimes, CanGetNextPrime);
-
-// At this point the test pattern is done.  However, you don't have
-// any real test yet as you haven't said which types you want to run
-// the tests with.
-
-// To turn the abstract test pattern into real tests, you instantiate
-// it with a list of types.  Usually the test pattern will be defined
-// in a .h file, and anyone can #include and instantiate it.  You can
-// even instantiate it more than once in the same program.  To tell
-// different instances apart, you give each of them a name, which will
-// become part of the test case name and can be used in test filters.
-
-// The list of types we want to test.  Note that it doesn't have to be
-// defined at the time we write the TYPED_TEST_P()s.
-typedef Types<OnTheFlyPrimeTable, PreCalculatedPrimeTable>
-    PrimeTableImplementations;
-INSTANTIATE_TYPED_TEST_SUITE_P(OnTheFlyAndPreCalculated,    // Instance name
-                               PrimeTableTest2,             // Test case name
-                               PrimeTableImplementations);  // Type list
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-}  // namespace
diff --git a/3rdparty/gtest/samples/sample7_unittest.cc b/3rdparty/gtest/samples/sample7_unittest.cc
deleted file mode 100644
index e0efc29e..00000000
--- a/3rdparty/gtest/samples/sample7_unittest.cc
+++ /dev/null
@@ -1,117 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to test common properties of multiple
-// implementations of an interface (aka interface tests) using
-// value-parameterized tests. Each test in the test case has
-// a parameter that is an interface pointer to an implementation
-// tested.
-
-// The interface and its implementations are in this header.
-#include "prime_tables.h"
-
-#include "gtest/gtest.h"
-namespace {
-
-using ::testing::TestWithParam;
-using ::testing::Values;
-
-// As a general rule, to prevent a test from affecting the tests that come
-// after it, you should create and destroy the tested objects for each test
-// instead of reusing them.  In this sample we will define a simple factory
-// function for PrimeTable objects.  We will instantiate objects in test's
-// SetUp() method and delete them in TearDown() method.
-typedef PrimeTable* CreatePrimeTableFunc();
-
-PrimeTable* CreateOnTheFlyPrimeTable() {
-  return new OnTheFlyPrimeTable();
-}
-
-template <size_t max_precalculated>
-PrimeTable* CreatePreCalculatedPrimeTable() {
-  return new PreCalculatedPrimeTable(max_precalculated);
-}
-
-// Inside the test body, fixture constructor, SetUp(), and TearDown() you
-// can refer to the test parameter by GetParam().  In this case, the test
-// parameter is a factory function which we call in fixture's SetUp() to
-// create and store an instance of PrimeTable.
-class PrimeTableTestSmpl7 : public TestWithParam<CreatePrimeTableFunc*> {
- public:
-  ~PrimeTableTestSmpl7() override { delete table_; }
-  void SetUp() override { table_ = (*GetParam())(); }
-  void TearDown() override {
-    delete table_;
-    table_ = nullptr;
-  }
-
- protected:
-  PrimeTable* table_;
-};
-
-TEST_P(PrimeTableTestSmpl7, ReturnsFalseForNonPrimes) {
-  EXPECT_FALSE(table_->IsPrime(-5));
-  EXPECT_FALSE(table_->IsPrime(0));
-  EXPECT_FALSE(table_->IsPrime(1));
-  EXPECT_FALSE(table_->IsPrime(4));
-  EXPECT_FALSE(table_->IsPrime(6));
-  EXPECT_FALSE(table_->IsPrime(100));
-}
-
-TEST_P(PrimeTableTestSmpl7, ReturnsTrueForPrimes) {
-  EXPECT_TRUE(table_->IsPrime(2));
-  EXPECT_TRUE(table_->IsPrime(3));
-  EXPECT_TRUE(table_->IsPrime(5));
-  EXPECT_TRUE(table_->IsPrime(7));
-  EXPECT_TRUE(table_->IsPrime(11));
-  EXPECT_TRUE(table_->IsPrime(131));
-}
-
-TEST_P(PrimeTableTestSmpl7, CanGetNextPrime) {
-  EXPECT_EQ(2, table_->GetNextPrime(0));
-  EXPECT_EQ(3, table_->GetNextPrime(2));
-  EXPECT_EQ(5, table_->GetNextPrime(3));
-  EXPECT_EQ(7, table_->GetNextPrime(5));
-  EXPECT_EQ(11, table_->GetNextPrime(7));
-  EXPECT_EQ(131, table_->GetNextPrime(128));
-}
-
-// In order to run value-parameterized tests, you need to instantiate them,
-// or bind them to a list of values which will be used as test parameters.
-// You can instantiate them in a different translation module, or even
-// instantiate them several times.
-//
-// Here, we instantiate our tests with a list of two PrimeTable object
-// factory functions:
-INSTANTIATE_TEST_SUITE_P(OnTheFlyAndPreCalculated, PrimeTableTestSmpl7,
-                         Values(&CreateOnTheFlyPrimeTable,
-                                &CreatePreCalculatedPrimeTable<1000>));
-
-}  // namespace
diff --git a/3rdparty/gtest/samples/sample8_unittest.cc b/3rdparty/gtest/samples/sample8_unittest.cc
deleted file mode 100644
index 10488b0e..00000000
--- a/3rdparty/gtest/samples/sample8_unittest.cc
+++ /dev/null
@@ -1,154 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to test code relying on some global flag variables.
-// Combine() helps with generating all possible combinations of such flags,
-// and each test is given one combination as a parameter.
-
-// Use class definitions to test from this header.
-#include "prime_tables.h"
-
-#include "gtest/gtest.h"
-namespace {
-
-// Suppose we want to introduce a new, improved implementation of PrimeTable
-// which combines speed of PrecalcPrimeTable and versatility of
-// OnTheFlyPrimeTable (see prime_tables.h). Inside it instantiates both
-// PrecalcPrimeTable and OnTheFlyPrimeTable and uses the one that is more
-// appropriate under the circumstances. But in low memory conditions, it can be
-// told to instantiate without PrecalcPrimeTable instance at all and use only
-// OnTheFlyPrimeTable.
-class HybridPrimeTable : public PrimeTable {
- public:
-  HybridPrimeTable(bool force_on_the_fly, int max_precalculated)
-      : on_the_fly_impl_(new OnTheFlyPrimeTable),
-        precalc_impl_(force_on_the_fly
-                          ? nullptr
-                          : new PreCalculatedPrimeTable(max_precalculated)),
-        max_precalculated_(max_precalculated) {}
-  ~HybridPrimeTable() override {
-    delete on_the_fly_impl_;
-    delete precalc_impl_;
-  }
-
-  bool IsPrime(int n) const override {
-    if (precalc_impl_ != nullptr && n < max_precalculated_)
-      return precalc_impl_->IsPrime(n);
-    else
-      return on_the_fly_impl_->IsPrime(n);
-  }
-
-  int GetNextPrime(int p) const override {
-    int next_prime = -1;
-    if (precalc_impl_ != nullptr && p < max_precalculated_)
-      next_prime = precalc_impl_->GetNextPrime(p);
-
-    return next_prime != -1 ? next_prime : on_the_fly_impl_->GetNextPrime(p);
-  }
-
- private:
-  OnTheFlyPrimeTable* on_the_fly_impl_;
-  PreCalculatedPrimeTable* precalc_impl_;
-  int max_precalculated_;
-};
-
-using ::testing::TestWithParam;
-using ::testing::Bool;
-using ::testing::Values;
-using ::testing::Combine;
-
-// To test all code paths for HybridPrimeTable we must test it with numbers
-// both within and outside PreCalculatedPrimeTable's capacity and also with
-// PreCalculatedPrimeTable disabled. We do this by defining fixture which will
-// accept different combinations of parameters for instantiating a
-// HybridPrimeTable instance.
-class PrimeTableTest : public TestWithParam< ::std::tuple<bool, int> > {
- protected:
-  void SetUp() override {
-    bool force_on_the_fly;
-    int max_precalculated;
-    std::tie(force_on_the_fly, max_precalculated) = GetParam();
-    table_ = new HybridPrimeTable(force_on_the_fly, max_precalculated);
-  }
-  void TearDown() override {
-    delete table_;
-    table_ = nullptr;
-  }
-  HybridPrimeTable* table_;
-};
-
-TEST_P(PrimeTableTest, ReturnsFalseForNonPrimes) {
-  // Inside the test body, you can refer to the test parameter by GetParam().
-  // In this case, the test parameter is a PrimeTable interface pointer which
-  // we can use directly.
-  // Please note that you can also save it in the fixture's SetUp() method
-  // or constructor and use saved copy in the tests.
-
-  EXPECT_FALSE(table_->IsPrime(-5));
-  EXPECT_FALSE(table_->IsPrime(0));
-  EXPECT_FALSE(table_->IsPrime(1));
-  EXPECT_FALSE(table_->IsPrime(4));
-  EXPECT_FALSE(table_->IsPrime(6));
-  EXPECT_FALSE(table_->IsPrime(100));
-}
-
-TEST_P(PrimeTableTest, ReturnsTrueForPrimes) {
-  EXPECT_TRUE(table_->IsPrime(2));
-  EXPECT_TRUE(table_->IsPrime(3));
-  EXPECT_TRUE(table_->IsPrime(5));
-  EXPECT_TRUE(table_->IsPrime(7));
-  EXPECT_TRUE(table_->IsPrime(11));
-  EXPECT_TRUE(table_->IsPrime(131));
-}
-
-TEST_P(PrimeTableTest, CanGetNextPrime) {
-  EXPECT_EQ(2, table_->GetNextPrime(0));
-  EXPECT_EQ(3, table_->GetNextPrime(2));
-  EXPECT_EQ(5, table_->GetNextPrime(3));
-  EXPECT_EQ(7, table_->GetNextPrime(5));
-  EXPECT_EQ(11, table_->GetNextPrime(7));
-  EXPECT_EQ(131, table_->GetNextPrime(128));
-}
-
-// In order to run value-parameterized tests, you need to instantiate them,
-// or bind them to a list of values which will be used as test parameters.
-// You can instantiate them in a different translation module, or even
-// instantiate them several times.
-//
-// Here, we instantiate our tests with a list of parameters. We must combine
-// all variations of the boolean flag suppressing PrecalcPrimeTable and some
-// meaningful values for tests. We choose a small value (1), and a value that
-// will put some of the tested numbers beyond the capability of the
-// PrecalcPrimeTable instance and some inside it (10). Combine will produce all
-// possible combinations.
-INSTANTIATE_TEST_SUITE_P(MeaningfulTestParameters, PrimeTableTest,
-                         Combine(Bool(), Values(1, 10)));
-
-}  // namespace
diff --git a/3rdparty/gtest/samples/sample9_unittest.cc b/3rdparty/gtest/samples/sample9_unittest.cc
deleted file mode 100644
index e502d08d..00000000
--- a/3rdparty/gtest/samples/sample9_unittest.cc
+++ /dev/null
@@ -1,156 +0,0 @@
-// Copyright 2009 Google Inc. All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to use Google Test listener API to implement
-// an alternative console output and how to use the UnitTest reflection API
-// to enumerate test cases and tests and to inspect their results.
-
-#include <stdio.h>
-
-#include "gtest/gtest.h"
-
-using ::testing::EmptyTestEventListener;
-using ::testing::InitGoogleTest;
-using ::testing::Test;
-using ::testing::TestCase;
-using ::testing::TestEventListeners;
-using ::testing::TestInfo;
-using ::testing::TestPartResult;
-using ::testing::UnitTest;
-namespace {
-// Provides alternative output mode which produces minimal amount of
-// information about tests.
-class TersePrinter : public EmptyTestEventListener {
- private:
-  // Called before any test activity starts.
-  void OnTestProgramStart(const UnitTest& /* unit_test */) override {}
-
-  // Called after all test activities have ended.
-  void OnTestProgramEnd(const UnitTest& unit_test) override {
-    fprintf(stdout, "TEST %s\n", unit_test.Passed() ? "PASSED" : "FAILED");
-    fflush(stdout);
-  }
-
-  // Called before a test starts.
-  void OnTestStart(const TestInfo& test_info) override {
-    fprintf(stdout,
-            "*** Test %s.%s starting.\n",
-            test_info.test_case_name(),
-            test_info.name());
-    fflush(stdout);
-  }
-
-  // Called after a failed assertion or a SUCCEED() invocation.
-  void OnTestPartResult(const TestPartResult& test_part_result) override {
-    fprintf(stdout,
-            "%s in %s:%d\n%s\n",
-            test_part_result.failed() ? "*** Failure" : "Success",
-            test_part_result.file_name(),
-            test_part_result.line_number(),
-            test_part_result.summary());
-    fflush(stdout);
-  }
-
-  // Called after a test ends.
-  void OnTestEnd(const TestInfo& test_info) override {
-    fprintf(stdout,
-            "*** Test %s.%s ending.\n",
-            test_info.test_case_name(),
-            test_info.name());
-    fflush(stdout);
-  }
-};  // class TersePrinter
-
-TEST(CustomOutputTest, PrintsMessage) {
-  printf("Printing something from the test body...\n");
-}
-
-TEST(CustomOutputTest, Succeeds) {
-  SUCCEED() << "SUCCEED() has been invoked from here";
-}
-
-TEST(CustomOutputTest, Fails) {
-  EXPECT_EQ(1, 2)
-      << "This test fails in order to demonstrate alternative failure messages";
-}
-}  // namespace
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-
-  bool terse_output = false;
-  if (argc > 1 && strcmp(argv[1], "--terse_output") == 0 )
-    terse_output = true;
-  else
-    printf("%s\n", "Run this program with --terse_output to change the way "
-           "it prints its output.");
-
-  UnitTest& unit_test = *UnitTest::GetInstance();
-
-  // If we are given the --terse_output command line flag, suppresses the
-  // standard output and attaches own result printer.
-  if (terse_output) {
-    TestEventListeners& listeners = unit_test.listeners();
-
-    // Removes the default console output listener from the list so it will
-    // not receive events from Google Test and won't print any output. Since
-    // this operation transfers ownership of the listener to the caller we
-    // have to delete it as well.
-    delete listeners.Release(listeners.default_result_printer());
-
-    // Adds the custom output listener to the list. It will now receive
-    // events from Google Test and print the alternative output. We don't
-    // have to worry about deleting it since Google Test assumes ownership
-    // over it after adding it to the list.
-    listeners.Append(new TersePrinter);
-  }
-  int ret_val = RUN_ALL_TESTS();
-
-  // This is an example of using the UnitTest reflection API to inspect test
-  // results. Here we discount failures from the tests we expected to fail.
-  int unexpectedly_failed_tests = 0;
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    const testing::TestSuite& test_suite = *unit_test.GetTestSuite(i);
-    for (int j = 0; j < test_suite.total_test_count(); ++j) {
-      const TestInfo& test_info = *test_suite.GetTestInfo(j);
-      // Counts failed tests that were not meant to fail (those without
-      // 'Fails' in the name).
-      if (test_info.result()->Failed() &&
-          strcmp(test_info.name(), "Fails") != 0) {
-        unexpectedly_failed_tests++;
-      }
-    }
-  }
-
-  // Test that were meant to fail should not affect the test program outcome.
-  if (unexpectedly_failed_tests == 0)
-    ret_val = 0;
-
-  return ret_val;
-}
diff --git a/3rdparty/gtest/scripts/common.py b/3rdparty/gtest/scripts/common.py
deleted file mode 100644
index 3c0347a7..00000000
--- a/3rdparty/gtest/scripts/common.py
+++ /dev/null
@@ -1,83 +0,0 @@
-# Copyright 2013 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Shared utilities for writing scripts for Google Test/Mock."""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-
-import os
-import re
-
-
-# Matches the line from 'svn info .' output that describes what SVN
-# path the current local directory corresponds to.  For example, in
-# a googletest SVN workspace's trunk/test directory, the output will be:
-#
-# URL: https://googletest.googlecode.com/svn/trunk/test
-_SVN_INFO_URL_RE = re.compile(r'^URL: https://(\w+)\.googlecode\.com/svn(.*)')
-
-
-def GetCommandOutput(command):
-  """Runs the shell command and returns its stdout as a list of lines."""
-
-  f = os.popen(command, 'r')
-  lines = [line.strip() for line in f.readlines()]
-  f.close()
-  return lines
-
-
-def GetSvnInfo():
-  """Returns the project name and the current SVN workspace's root path."""
-
-  for line in GetCommandOutput('svn info .'):
-    m = _SVN_INFO_URL_RE.match(line)
-    if m:
-      project = m.group(1)  # googletest or googlemock
-      rel_path = m.group(2)
-      root = os.path.realpath(rel_path.count('/') * '../')
-      return project, root
-
-  return None, None
-
-
-def GetSvnTrunk():
-  """Returns the current SVN workspace's trunk root path."""
-
-  _, root = GetSvnInfo()
-  return root + '/trunk' if root else None
-
-
-def IsInGTestSvn():
-  project, _ = GetSvnInfo()
-  return project == 'googletest'
-
-
-def IsInGMockSvn():
-  project, _ = GetSvnInfo()
-  return project == 'googlemock'
diff --git a/3rdparty/gtest/scripts/fuse_gtest_files.py b/3rdparty/gtest/scripts/fuse_gtest_files.py
deleted file mode 100644
index d0dd464f..00000000
--- a/3rdparty/gtest/scripts/fuse_gtest_files.py
+++ /dev/null
@@ -1,253 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""fuse_gtest_files.py v0.2.0
-Fuses Google Test source code into a .h file and a .cc file.
-
-SYNOPSIS
-       fuse_gtest_files.py [GTEST_ROOT_DIR] OUTPUT_DIR
-
-       Scans GTEST_ROOT_DIR for Google Test source code, and generates
-       two files: OUTPUT_DIR/gtest/gtest.h and OUTPUT_DIR/gtest/gtest-all.cc.
-       Then you can build your tests by adding OUTPUT_DIR to the include
-       search path and linking with OUTPUT_DIR/gtest/gtest-all.cc.  These
-       two files contain everything you need to use Google Test.  Hence
-       you can "install" Google Test by copying them to wherever you want.
-
-       GTEST_ROOT_DIR can be omitted and defaults to the parent
-       directory of the directory holding this script.
-
-EXAMPLES
-       ./fuse_gtest_files.py fused_gtest
-       ./fuse_gtest_files.py path/to/unpacked/gtest fused_gtest
-
-This tool is experimental.  In particular, it assumes that there is no
-conditional inclusion of Google Test headers.  Please report any
-problems to googletestframework@googlegroups.com.  You can read
-https://github.com/google/googletest/blob/master/googletest/docs/advanced.md for
-more information.
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import re
-try:
-  from sets import Set as set  # For Python 2.3 compatibility
-except ImportError:
-  pass
-import sys
-
-# We assume that this file is in the scripts/ directory in the Google
-# Test root directory.
-DEFAULT_GTEST_ROOT_DIR = os.path.join(os.path.dirname(__file__), '..')
-
-# Regex for matching '#include "gtest/..."'.
-INCLUDE_GTEST_FILE_REGEX = re.compile(r'^\s*#\s*include\s*"(gtest/.+)"')
-
-# Regex for matching '#include "src/..."'.
-INCLUDE_SRC_FILE_REGEX = re.compile(r'^\s*#\s*include\s*"(src/.+)"')
-
-# Where to find the source seed files.
-GTEST_H_SEED = 'include/gtest/gtest.h'
-GTEST_SPI_H_SEED = 'include/gtest/gtest-spi.h'
-GTEST_ALL_CC_SEED = 'src/gtest-all.cc'
-
-# Where to put the generated files.
-GTEST_H_OUTPUT = 'gtest/gtest.h'
-GTEST_ALL_CC_OUTPUT = 'gtest/gtest-all.cc'
-
-
-def VerifyFileExists(directory, relative_path):
-  """Verifies that the given file exists; aborts on failure.
-
-  relative_path is the file path relative to the given directory.
-  """
-
-  if not os.path.isfile(os.path.join(directory, relative_path)):
-    print('ERROR: Cannot find %s in directory %s.' % (relative_path,
-                                                      directory))
-    print('Please either specify a valid project root directory '
-          'or omit it on the command line.')
-    sys.exit(1)
-
-
-def ValidateGTestRootDir(gtest_root):
-  """Makes sure gtest_root points to a valid gtest root directory.
-
-  The function aborts the program on failure.
-  """
-
-  VerifyFileExists(gtest_root, GTEST_H_SEED)
-  VerifyFileExists(gtest_root, GTEST_ALL_CC_SEED)
-
-
-def VerifyOutputFile(output_dir, relative_path):
-  """Verifies that the given output file path is valid.
-
-  relative_path is relative to the output_dir directory.
-  """
-
-  # Makes sure the output file either doesn't exist or can be overwritten.
-  output_file = os.path.join(output_dir, relative_path)
-  if os.path.exists(output_file):
-    # TODO(wan@google.com): The following user-interaction doesn't
-    # work with automated processes.  We should provide a way for the
-    # Makefile to force overwriting the files.
-    print('%s already exists in directory %s - overwrite it? (y/N) ' %
-          (relative_path, output_dir))
-    answer = sys.stdin.readline().strip()
-    if answer not in ['y', 'Y']:
-      print('ABORTED.')
-      sys.exit(1)
-
-  # Makes sure the directory holding the output file exists; creates
-  # it and all its ancestors if necessary.
-  parent_directory = os.path.dirname(output_file)
-  if not os.path.isdir(parent_directory):
-    os.makedirs(parent_directory)
-
-
-def ValidateOutputDir(output_dir):
-  """Makes sure output_dir points to a valid output directory.
-
-  The function aborts the program on failure.
-  """
-
-  VerifyOutputFile(output_dir, GTEST_H_OUTPUT)
-  VerifyOutputFile(output_dir, GTEST_ALL_CC_OUTPUT)
-
-
-def FuseGTestH(gtest_root, output_dir):
-  """Scans folder gtest_root to generate gtest/gtest.h in output_dir."""
-
-  output_file = open(os.path.join(output_dir, GTEST_H_OUTPUT), 'w')
-  processed_files = set()  # Holds all gtest headers we've processed.
-
-  def ProcessFile(gtest_header_path):
-    """Processes the given gtest header file."""
-
-    # We don't process the same header twice.
-    if gtest_header_path in processed_files:
-      return
-
-    processed_files.add(gtest_header_path)
-
-    # Reads each line in the given gtest header.
-    for line in open(os.path.join(gtest_root, gtest_header_path), 'r'):
-      m = INCLUDE_GTEST_FILE_REGEX.match(line)
-      if m:
-        # It's '#include "gtest/..."' - let's process it recursively.
-        ProcessFile('include/' + m.group(1))
-      else:
-        # Otherwise we copy the line unchanged to the output file.
-        output_file.write(line)
-
-  ProcessFile(GTEST_H_SEED)
-  output_file.close()
-
-
-def FuseGTestAllCcToFile(gtest_root, output_file):
-  """Scans folder gtest_root to generate gtest/gtest-all.cc in output_file."""
-
-  processed_files = set()
-
-  def ProcessFile(gtest_source_file):
-    """Processes the given gtest source file."""
-
-    # We don't process the same #included file twice.
-    if gtest_source_file in processed_files:
-      return
-
-    processed_files.add(gtest_source_file)
-
-    # Reads each line in the given gtest source file.
-    for line in open(os.path.join(gtest_root, gtest_source_file), 'r'):
-      m = INCLUDE_GTEST_FILE_REGEX.match(line)
-      if m:
-        if 'include/' + m.group(1) == GTEST_SPI_H_SEED:
-          # It's '#include "gtest/gtest-spi.h"'.  This file is not
-          # #included by "gtest/gtest.h", so we need to process it.
-          ProcessFile(GTEST_SPI_H_SEED)
-        else:
-          # It's '#include "gtest/foo.h"' where foo is not gtest-spi.
-          # We treat it as '#include "gtest/gtest.h"', as all other
-          # gtest headers are being fused into gtest.h and cannot be
-          # #included directly.
-
-          # There is no need to #include "gtest/gtest.h" more than once.
-          if not GTEST_H_SEED in processed_files:
-            processed_files.add(GTEST_H_SEED)
-            output_file.write('#include "%s"\n' % (GTEST_H_OUTPUT,))
-      else:
-        m = INCLUDE_SRC_FILE_REGEX.match(line)
-        if m:
-          # It's '#include "src/foo"' - let's process it recursively.
-          ProcessFile(m.group(1))
-        else:
-          output_file.write(line)
-
-  ProcessFile(GTEST_ALL_CC_SEED)
-
-
-def FuseGTestAllCc(gtest_root, output_dir):
-  """Scans folder gtest_root to generate gtest/gtest-all.cc in output_dir."""
-
-  output_file = open(os.path.join(output_dir, GTEST_ALL_CC_OUTPUT), 'w')
-  FuseGTestAllCcToFile(gtest_root, output_file)
-  output_file.close()
-
-
-def FuseGTest(gtest_root, output_dir):
-  """Fuses gtest.h and gtest-all.cc."""
-
-  ValidateGTestRootDir(gtest_root)
-  ValidateOutputDir(output_dir)
-
-  FuseGTestH(gtest_root, output_dir)
-  FuseGTestAllCc(gtest_root, output_dir)
-
-
-def main():
-  argc = len(sys.argv)
-  if argc == 2:
-    # fuse_gtest_files.py OUTPUT_DIR
-    FuseGTest(DEFAULT_GTEST_ROOT_DIR, sys.argv[1])
-  elif argc == 3:
-    # fuse_gtest_files.py GTEST_ROOT_DIR OUTPUT_DIR
-    FuseGTest(sys.argv[1], sys.argv[2])
-  else:
-    print(__doc__)
-    sys.exit(1)
-
-
-if __name__ == '__main__':
-  main()
diff --git a/3rdparty/gtest/scripts/gen_gtest_pred_impl.py b/3rdparty/gtest/scripts/gen_gtest_pred_impl.py
deleted file mode 100644
index b43efdf4..00000000
--- a/3rdparty/gtest/scripts/gen_gtest_pred_impl.py
+++ /dev/null
@@ -1,730 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""gen_gtest_pred_impl.py v0.1
-
-Generates the implementation of Google Test predicate assertions and
-accompanying tests.
-
-Usage:
-
-  gen_gtest_pred_impl.py MAX_ARITY
-
-where MAX_ARITY is a positive integer.
-
-The command generates the implementation of up-to MAX_ARITY-ary
-predicate assertions, and writes it to file gtest_pred_impl.h in the
-directory where the script is.  It also generates the accompanying
-unit test in file gtest_pred_impl_unittest.cc.
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import sys
-import time
-
-# Where this script is.
-SCRIPT_DIR = os.path.dirname(sys.argv[0])
-
-# Where to store the generated header.
-HEADER = os.path.join(SCRIPT_DIR, '../include/gtest/gtest_pred_impl.h')
-
-# Where to store the generated unit test.
-UNIT_TEST = os.path.join(SCRIPT_DIR, '../test/gtest_pred_impl_unittest.cc')
-
-
-def HeaderPreamble(n):
-  """Returns the preamble for the header file.
-
-  Args:
-    n:  the maximum arity of the predicate macros to be generated.
-  """
-
-  # A map that defines the values used in the preamble template.
-  DEFS = {
-    'today' : time.strftime('%m/%d/%Y'),
-    'year' : time.strftime('%Y'),
-    'command' : '%s %s' % (os.path.basename(sys.argv[0]), n),
-    'n' : n
-    }
-
-  return (
-"""// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file is AUTOMATICALLY GENERATED on %(today)s by command
-// '%(command)s'.  DO NOT EDIT BY HAND!
-//
-// Implements a family of generic predicate assertion macros.
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-#define GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-
-#include "gtest/gtest.h"
-
-namespace testing {
-
-// This header implements a family of generic predicate assertion
-// macros:
-//
-//   ASSERT_PRED_FORMAT1(pred_format, v1)
-//   ASSERT_PRED_FORMAT2(pred_format, v1, v2)
-//   ...
-//
-// where pred_format is a function or functor that takes n (in the
-// case of ASSERT_PRED_FORMATn) values and their source expression
-// text, and returns a testing::AssertionResult.  See the definition
-// of ASSERT_EQ in gtest.h for an example.
-//
-// If you don't care about formatting, you can use the more
-// restrictive version:
-//
-//   ASSERT_PRED1(pred, v1)
-//   ASSERT_PRED2(pred, v1, v2)
-//   ...
-//
-// where pred is an n-ary function or functor that returns bool,
-// and the values v1, v2, ..., must support the << operator for
-// streaming to std::ostream.
-//
-// We also define the EXPECT_* variations.
-//
-// For now we only support predicates whose arity is at most %(n)s.
-// Please email googletestframework@googlegroups.com if you need
-// support for higher arities.
-
-// GTEST_ASSERT_ is the basic statement to which all of the assertions
-// in this file reduce.  Don't use this in your code.
-
-#define GTEST_ASSERT_(expression, on_failure) \\
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \\
-  if (const ::testing::AssertionResult gtest_ar = (expression)) \\
-    ; \\
-  else \\
-    on_failure(gtest_ar.failure_message())
-""" % DEFS)
-
-
-def Arity(n):
-  """Returns the English name of the given arity."""
-
-  if n < 0:
-    return None
-  elif n <= 3:
-    return ['nullary', 'unary', 'binary', 'ternary'][n]
-  else:
-    return '%s-ary' % n
-
-
-def Title(word):
-  """Returns the given word in title case.  The difference between
-  this and string's title() method is that Title('4-ary') is '4-ary'
-  while '4-ary'.title() is '4-Ary'."""
-
-  return word[0].upper() + word[1:]
-
-
-def OneTo(n):
-  """Returns the list [1, 2, 3, ..., n]."""
-
-  return range(1, n + 1)
-
-
-def Iter(n, format, sep=''):
-  """Given a positive integer n, a format string that contains 0 or
-  more '%s' format specs, and optionally a separator string, returns
-  the join of n strings, each formatted with the format string on an
-  iterator ranged from 1 to n.
-
-  Example:
-
-  Iter(3, 'v%s', sep=', ') returns 'v1, v2, v3'.
-  """
-
-  # How many '%s' specs are in format?
-  spec_count = len(format.split('%s')) - 1
-  return sep.join([format % (spec_count * (i,)) for i in OneTo(n)])
-
-
-def ImplementationForArity(n):
-  """Returns the implementation of n-ary predicate assertions."""
-
-  # A map the defines the values used in the implementation template.
-  DEFS = {
-    'n' : str(n),
-    'vs' : Iter(n, 'v%s', sep=', '),
-    'vts' : Iter(n, '#v%s', sep=', '),
-    'arity' : Arity(n),
-    'Arity' : Title(Arity(n))
-    }
-
-  impl = """
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED%(n)s.  Don't use
-// this in your code.
-template <typename Pred""" % DEFS
-
-  impl += Iter(n, """,
-          typename T%s""")
-
-  impl += """>
-AssertionResult AssertPred%(n)sHelper(const char* pred_text""" % DEFS
-
-  impl += Iter(n, """,
-                                  const char* e%s""")
-
-  impl += """,
-                                  Pred pred"""
-
-  impl += Iter(n, """,
-                                  const T%s& v%s""")
-
-  impl += """) {
-  if (pred(%(vs)s)) return AssertionSuccess();
-
-""" % DEFS
-
-  impl += '  return AssertionFailure() << pred_text << "("'
-
-  impl += Iter(n, """
-                            << e%s""", sep=' << ", "')
-
-  impl += ' << ") evaluates to false, where"'
-
-  impl += Iter(n, """
-                            << "\\n" << e%s << " evaluates to " << v%s""")
-
-  impl += """;
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT%(n)s.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT%(n)s_(pred_format, %(vs)s, on_failure)\\
-  GTEST_ASSERT_(pred_format(%(vts)s, %(vs)s), \\
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED%(n)s.  Don't use
-// this in your code.
-#define GTEST_PRED%(n)s_(pred, %(vs)s, on_failure)\\
-  GTEST_ASSERT_(::testing::AssertPred%(n)sHelper(#pred""" % DEFS
-
-  impl += Iter(n, """, \\
-                                             #v%s""")
-
-  impl += """, \\
-                                             pred"""
-
-  impl += Iter(n, """, \\
-                                             v%s""")
-
-  impl += """), on_failure)
-
-// %(Arity)s predicate assertion macros.
-#define EXPECT_PRED_FORMAT%(n)s(pred_format, %(vs)s) \\
-  GTEST_PRED_FORMAT%(n)s_(pred_format, %(vs)s, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED%(n)s(pred, %(vs)s) \\
-  GTEST_PRED%(n)s_(pred, %(vs)s, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT%(n)s(pred_format, %(vs)s) \\
-  GTEST_PRED_FORMAT%(n)s_(pred_format, %(vs)s, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED%(n)s(pred, %(vs)s) \\
-  GTEST_PRED%(n)s_(pred, %(vs)s, GTEST_FATAL_FAILURE_)
-
-""" % DEFS
-
-  return impl
-
-
-def HeaderPostamble():
-  """Returns the postamble for the header file."""
-
-  return """
-
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-"""
-
-
-def GenerateFile(path, content):
-  """Given a file path and a content string
-     overwrites it with the given content.
-  """
-  print 'Updating file %s . . .' % path
-  f = file(path, 'w+')
-  print >>f, content,
-  f.close()
-
-  print 'File %s has been updated.' % path
-
-
-def GenerateHeader(n):
-  """Given the maximum arity n, updates the header file that implements
-  the predicate assertions.
-  """
-  GenerateFile(HEADER,
-               HeaderPreamble(n)
-               + ''.join([ImplementationForArity(i) for i in OneTo(n)])
-               + HeaderPostamble())
-
-
-def UnitTestPreamble():
-  """Returns the preamble for the unit test file."""
-
-  # A map that defines the values used in the preamble template.
-  DEFS = {
-    'today' : time.strftime('%m/%d/%Y'),
-    'year' : time.strftime('%Y'),
-    'command' : '%s %s' % (os.path.basename(sys.argv[0]), sys.argv[1]),
-    }
-
-  return (
-"""// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file is AUTOMATICALLY GENERATED on %(today)s by command
-// '%(command)s'.  DO NOT EDIT BY HAND!
-
-// Regression test for gtest_pred_impl.h
-//
-// This file is generated by a script and quite long.  If you intend to
-// learn how Google Test works by reading its unit tests, read
-// gtest_unittest.cc instead.
-//
-// This is intended as a regression test for the Google Test predicate
-// assertions.  We compile it as part of the gtest_unittest target
-// only to keep the implementation tidy and compact, as it is quite
-// involved to set up the stage for testing Google Test using Google
-// Test itself.
-//
-// Currently, gtest_unittest takes ~11 seconds to run in the testing
-// daemon.  In the future, if it grows too large and needs much more
-// time to finish, we should consider separating this file into a
-// stand-alone regression test.
-
-#include <iostream>
-
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-
-// A user-defined data type.
-struct Bool {
-  explicit Bool(int val) : value(val != 0) {}
-
-  bool operator>(int n) const { return value > Bool(n).value; }
-
-  Bool operator+(const Bool& rhs) const { return Bool(value + rhs.value); }
-
-  bool operator==(const Bool& rhs) const { return value == rhs.value; }
-
-  bool value;
-};
-
-// Enables Bool to be used in assertions.
-std::ostream& operator<<(std::ostream& os, const Bool& x) {
-  return os << (x.value ? "true" : "false");
-}
-
-""" % DEFS)
-
-
-def TestsForArity(n):
-  """Returns the tests for n-ary predicate assertions."""
-
-  # A map that defines the values used in the template for the tests.
-  DEFS = {
-    'n' : n,
-    'es' : Iter(n, 'e%s', sep=', '),
-    'vs' : Iter(n, 'v%s', sep=', '),
-    'vts' : Iter(n, '#v%s', sep=', '),
-    'tvs' : Iter(n, 'T%s v%s', sep=', '),
-    'int_vs' : Iter(n, 'int v%s', sep=', '),
-    'Bool_vs' : Iter(n, 'Bool v%s', sep=', '),
-    'types' : Iter(n, 'typename T%s', sep=', '),
-    'v_sum' : Iter(n, 'v%s', sep=' + '),
-    'arity' : Arity(n),
-    'Arity' : Title(Arity(n)),
-    }
-
-  tests = (
-"""// Sample functions/functors for testing %(arity)s predicate assertions.
-
-// A %(arity)s predicate function.
-template <%(types)s>
-bool PredFunction%(n)s(%(tvs)s) {
-  return %(v_sum)s > 0;
-}
-
-// The following two functions are needed to circumvent a bug in
-// gcc 2.95.3, which sometimes has problem with the above template
-// function.
-bool PredFunction%(n)sInt(%(int_vs)s) {
-  return %(v_sum)s > 0;
-}
-bool PredFunction%(n)sBool(%(Bool_vs)s) {
-  return %(v_sum)s > 0;
-}
-""" % DEFS)
-
-  tests += """
-// A %(arity)s predicate functor.
-struct PredFunctor%(n)s {
-  template <%(types)s>
-  bool operator()(""" % DEFS
-
-  tests += Iter(n, 'const T%s& v%s', sep=""",
-                  """)
-
-  tests += """) {
-    return %(v_sum)s > 0;
-  }
-};
-""" % DEFS
-
-  tests += """
-// A %(arity)s predicate-formatter function.
-template <%(types)s>
-testing::AssertionResult PredFormatFunction%(n)s(""" % DEFS
-
-  tests += Iter(n, 'const char* e%s', sep=""",
-                                             """)
-
-  tests += Iter(n, """,
-                                             const T%s& v%s""")
-
-  tests += """) {
-  if (PredFunction%(n)s(%(vs)s))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << """ % DEFS
-
-  tests += Iter(n, 'e%s', sep=' << " + " << ')
-
-  tests += """
-      << " is expected to be positive, but evaluates to "
-      << %(v_sum)s << ".";
-}
-""" % DEFS
-
-  tests += """
-// A %(arity)s predicate-formatter functor.
-struct PredFormatFunctor%(n)s {
-  template <%(types)s>
-  testing::AssertionResult operator()(""" % DEFS
-
-  tests += Iter(n, 'const char* e%s', sep=""",
-                                      """)
-
-  tests += Iter(n, """,
-                                      const T%s& v%s""")
-
-  tests += """) const {
-    return PredFormatFunction%(n)s(%(es)s, %(vs)s);
-  }
-};
-""" % DEFS
-
-  tests += """
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT%(n)s.
-
-class Predicate%(n)sTest : public testing::Test {
- protected:
-  virtual void SetUp() {
-    expected_to_finish_ = true;
-    finished_ = false;""" % DEFS
-
-  tests += """
-    """ + Iter(n, 'n%s_ = ') + """0;
-  }
-"""
-
-  tests += """
-  virtual void TearDown() {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once."""
-
-  tests += ''.join(["""
-    EXPECT_EQ(1, n%s_) <<
-        "The predicate assertion didn't evaluate argument %s "
-        "exactly once.";""" % (i, i + 1) for i in OneTo(n)])
-
-  tests += """
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true iff the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true iff the test function did run to finish.
-  static bool finished_;
-""" % DEFS
-
-  tests += Iter(n, """
-  static int n%s_;""")
-
-  tests += """
-};
-
-bool Predicate%(n)sTest::expected_to_finish_;
-bool Predicate%(n)sTest::finished_;
-""" % DEFS
-
-  tests += Iter(n, """int Predicate%%(n)sTest::n%s_;
-""") % DEFS
-
-  tests += """
-typedef Predicate%(n)sTest EXPECT_PRED_FORMAT%(n)sTest;
-typedef Predicate%(n)sTest ASSERT_PRED_FORMAT%(n)sTest;
-typedef Predicate%(n)sTest EXPECT_PRED%(n)sTest;
-typedef Predicate%(n)sTest ASSERT_PRED%(n)sTest;
-""" % DEFS
-
-  def GenTest(use_format, use_assert, expect_failure,
-              use_functor, use_user_type):
-    """Returns the test for a predicate assertion macro.
-
-    Args:
-      use_format:     true iff the assertion is a *_PRED_FORMAT*.
-      use_assert:     true iff the assertion is a ASSERT_*.
-      expect_failure: true iff the assertion is expected to fail.
-      use_functor:    true iff the first argument of the assertion is
-                      a functor (as opposed to a function)
-      use_user_type:  true iff the predicate functor/function takes
-                      argument(s) of a user-defined type.
-
-    Example:
-
-      GenTest(1, 0, 0, 1, 0) returns a test that tests the behavior
-      of a successful EXPECT_PRED_FORMATn() that takes a functor
-      whose arguments have built-in types."""
-
-    if use_assert:
-      assrt = 'ASSERT'  # 'assert' is reserved, so we cannot use
-                        # that identifier here.
-    else:
-      assrt = 'EXPECT'
-
-    assertion = assrt + '_PRED'
-
-    if use_format:
-      pred_format = 'PredFormat'
-      assertion += '_FORMAT'
-    else:
-      pred_format = 'Pred'
-
-    assertion += '%(n)s' % DEFS
-
-    if use_functor:
-      pred_format_type = 'functor'
-      pred_format += 'Functor%(n)s()'
-    else:
-      pred_format_type = 'function'
-      pred_format += 'Function%(n)s'
-      if not use_format:
-        if use_user_type:
-          pred_format += 'Bool'
-        else:
-          pred_format += 'Int'
-
-    test_name = pred_format_type.title()
-
-    if use_user_type:
-      arg_type = 'user-defined type (Bool)'
-      test_name += 'OnUserType'
-      if expect_failure:
-        arg = 'Bool(n%s_++)'
-      else:
-        arg = 'Bool(++n%s_)'
-    else:
-      arg_type = 'built-in type (int)'
-      test_name += 'OnBuiltInType'
-      if expect_failure:
-        arg = 'n%s_++'
-      else:
-        arg = '++n%s_'
-
-    if expect_failure:
-      successful_or_failed = 'failed'
-      expected_or_not = 'expected.'
-      test_name +=  'Failure'
-    else:
-      successful_or_failed = 'successful'
-      expected_or_not = 'UNEXPECTED!'
-      test_name +=  'Success'
-
-    # A map that defines the values used in the test template.
-    defs = DEFS.copy()
-    defs.update({
-      'assert' : assrt,
-      'assertion' : assertion,
-      'test_name' : test_name,
-      'pf_type' : pred_format_type,
-      'pf' : pred_format,
-      'arg_type' : arg_type,
-      'arg' : arg,
-      'successful' : successful_or_failed,
-      'expected' : expected_or_not,
-      })
-
-    test = """
-// Tests a %(successful)s %(assertion)s where the
-// predicate-formatter is a %(pf_type)s on a %(arg_type)s.
-TEST_F(%(assertion)sTest, %(test_name)s) {""" % defs
-
-    indent = (len(assertion) + 3)*' '
-    extra_indent = ''
-
-    if expect_failure:
-      extra_indent = '  '
-      if use_assert:
-        test += """
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT"""
-      else:
-        test += """
-  EXPECT_NONFATAL_FAILURE({  // NOLINT"""
-
-    test += '\n' + extra_indent + """  %(assertion)s(%(pf)s""" % defs
-
-    test = test % defs
-    test += Iter(n, ',\n' + indent + extra_indent + '%(arg)s' % defs)
-    test += ');\n' + extra_indent + '  finished_ = true;\n'
-
-    if expect_failure:
-      test += '  }, "");\n'
-
-    test += '}\n'
-    return test
-
-  # Generates tests for all 2**6 = 64 combinations.
-  tests += ''.join([GenTest(use_format, use_assert, expect_failure,
-                            use_functor, use_user_type)
-                    for use_format in [0, 1]
-                    for use_assert in [0, 1]
-                    for expect_failure in [0, 1]
-                    for use_functor in [0, 1]
-                    for use_user_type in [0, 1]
-                    ])
-
-  return tests
-
-
-def UnitTestPostamble():
-  """Returns the postamble for the tests."""
-
-  return ''
-
-
-def GenerateUnitTest(n):
-  """Returns the tests for up-to n-ary predicate assertions."""
-
-  GenerateFile(UNIT_TEST,
-               UnitTestPreamble()
-               + ''.join([TestsForArity(i) for i in OneTo(n)])
-               + UnitTestPostamble())
-
-
-def _Main():
-  """The entry point of the script.  Generates the header file and its
-  unit test."""
-
-  if len(sys.argv) != 2:
-    print __doc__
-    print 'Author: ' + __author__
-    sys.exit(1)
-
-  n = int(sys.argv[1])
-  GenerateHeader(n)
-  GenerateUnitTest(n)
-
-
-if __name__ == '__main__':
-  _Main()
diff --git a/3rdparty/gtest/scripts/gtest-config.in b/3rdparty/gtest/scripts/gtest-config.in
deleted file mode 100644
index 780f8432..00000000
--- a/3rdparty/gtest/scripts/gtest-config.in
+++ /dev/null
@@ -1,274 +0,0 @@
-#!/bin/sh
-
-# These variables are automatically filled in by the configure script.
-name="@PACKAGE_TARNAME@"
-version="@PACKAGE_VERSION@"
-
-show_usage()
-{
-  echo "Usage: gtest-config [OPTIONS...]"
-}
-
-show_help()
-{
-  show_usage
-  cat <<\EOF
-
-The `gtest-config' script provides access to the necessary compile and linking
-flags to connect with Google C++ Testing Framework, both in a build prior to
-installation, and on the system proper after installation. The installation
-overrides may be issued in combination with any other queries, but will only
-affect installation queries if called on a built but not installed gtest. The
-installation queries may not be issued with any other types of queries, and
-only one installation query may be made at a time. The version queries and
-compiler flag queries may be combined as desired but not mixed. Different
-version queries are always combined with logical "and" semantics, and only the
-last of any particular query is used while all previous ones ignored. All
-versions must be specified as a sequence of numbers separated by periods.
-Compiler flag queries output the union of the sets of flags when combined.
-
- Examples:
-  gtest-config --min-version=1.0 || echo "Insufficient Google Test version."
-
-  g++ $(gtest-config --cppflags --cxxflags) -o foo.o -c foo.cpp
-  g++ $(gtest-config --ldflags --libs) -o foo foo.o
-
-  # When using a built but not installed Google Test:
-  g++ $(../../my_gtest_build/scripts/gtest-config ...) ...
-
-  # When using an installed Google Test, but with installation overrides:
-  export GTEST_PREFIX="/opt"
-  g++ $(gtest-config --libdir="/opt/lib64" ...) ...
-
- Help:
-  --usage                    brief usage information
-  --help                     display this help message
-
- Installation Overrides:
-  --prefix=<dir>             overrides the installation prefix
-  --exec-prefix=<dir>        overrides the executable installation prefix
-  --libdir=<dir>             overrides the library installation prefix
-  --includedir=<dir>         overrides the header file installation prefix
-
- Installation Queries:
-  --prefix                   installation prefix
-  --exec-prefix              executable installation prefix
-  --libdir                   library installation directory
-  --includedir               header file installation directory
-  --version                  the version of the Google Test installation
-
- Version Queries:
-  --min-version=VERSION      return 0 if the version is at least VERSION
-  --exact-version=VERSION    return 0 if the version is exactly VERSION
-  --max-version=VERSION      return 0 if the version is at most VERSION
-
- Compilation Flag Queries:
-  --cppflags                 compile flags specific to the C-like preprocessors
-  --cxxflags                 compile flags appropriate for C++ programs
-  --ldflags                  linker flags
-  --libs                     libraries for linking
-
-EOF
-}
-
-# This function bounds our version with a min and a max. It uses some clever
-# POSIX-compliant variable expansion to portably do all the work in the shell
-# and avoid any dependency on a particular "sed" or "awk" implementation.
-# Notable is that it will only ever compare the first 3 components of versions.
-# Further components will be cleanly stripped off. All versions must be
-# unadorned, so "v1.0" will *not* work. The minimum version must be in $1, and
-# the max in $2. TODO(chandlerc@google.com): If this ever breaks, we should
-# investigate expanding this via autom4te from AS_VERSION_COMPARE rather than
-# continuing to maintain our own shell version.
-check_versions()
-{
-  major_version=${version%%.*}
-  minor_version="0"
-  point_version="0"
-  if test "${version#*.}" != "${version}"; then
-    minor_version=${version#*.}
-    minor_version=${minor_version%%.*}
-  fi
-  if test "${version#*.*.}" != "${version}"; then
-    point_version=${version#*.*.}
-    point_version=${point_version%%.*}
-  fi
-
-  min_version="$1"
-  min_major_version=${min_version%%.*}
-  min_minor_version="0"
-  min_point_version="0"
-  if test "${min_version#*.}" != "${min_version}"; then
-    min_minor_version=${min_version#*.}
-    min_minor_version=${min_minor_version%%.*}
-  fi
-  if test "${min_version#*.*.}" != "${min_version}"; then
-    min_point_version=${min_version#*.*.}
-    min_point_version=${min_point_version%%.*}
-  fi
-
-  max_version="$2"
-  max_major_version=${max_version%%.*}
-  max_minor_version="0"
-  max_point_version="0"
-  if test "${max_version#*.}" != "${max_version}"; then
-    max_minor_version=${max_version#*.}
-    max_minor_version=${max_minor_version%%.*}
-  fi
-  if test "${max_version#*.*.}" != "${max_version}"; then
-    max_point_version=${max_version#*.*.}
-    max_point_version=${max_point_version%%.*}
-  fi
-
-  test $(($major_version)) -lt $(($min_major_version)) && exit 1
-  if test $(($major_version)) -eq $(($min_major_version)); then
-    test $(($minor_version)) -lt $(($min_minor_version)) && exit 1
-    if test $(($minor_version)) -eq $(($min_minor_version)); then
-      test $(($point_version)) -lt $(($min_point_version)) && exit 1
-    fi
-  fi
-
-  test $(($major_version)) -gt $(($max_major_version)) && exit 1
-  if test $(($major_version)) -eq $(($max_major_version)); then
-    test $(($minor_version)) -gt $(($max_minor_version)) && exit 1
-    if test $(($minor_version)) -eq $(($max_minor_version)); then
-      test $(($point_version)) -gt $(($max_point_version)) && exit 1
-    fi
-  fi
-
-  exit 0
-}
-
-# Show the usage line when no arguments are specified.
-if test $# -eq 0; then
-  show_usage
-  exit 1
-fi
-
-while test $# -gt 0; do
-  case $1 in
-    --usage)          show_usage;         exit 0;;
-    --help)           show_help;          exit 0;;
-
-    # Installation overrides
-    --prefix=*)       GTEST_PREFIX=${1#--prefix=};;
-    --exec-prefix=*)  GTEST_EXEC_PREFIX=${1#--exec-prefix=};;
-    --libdir=*)       GTEST_LIBDIR=${1#--libdir=};;
-    --includedir=*)   GTEST_INCLUDEDIR=${1#--includedir=};;
-
-    # Installation queries
-    --prefix|--exec-prefix|--libdir|--includedir|--version)
-      if test -n "${do_query}"; then
-        show_usage
-        exit 1
-      fi
-      do_query=${1#--}
-      ;;
-
-    # Version checking
-    --min-version=*)
-      do_check_versions=yes
-      min_version=${1#--min-version=}
-      ;;
-    --max-version=*)
-      do_check_versions=yes
-      max_version=${1#--max-version=}
-      ;;
-    --exact-version=*)
-      do_check_versions=yes
-      exact_version=${1#--exact-version=}
-      ;;
-
-    # Compiler flag output
-    --cppflags)       echo_cppflags=yes;;
-    --cxxflags)       echo_cxxflags=yes;;
-    --ldflags)        echo_ldflags=yes;;
-    --libs)           echo_libs=yes;;
-
-    # Everything else is an error
-    *)                show_usage;         exit 1;;
-  esac
-  shift
-done
-
-# These have defaults filled in by the configure script but can also be
-# overridden by environment variables or command line parameters.
-prefix="${GTEST_PREFIX:-@prefix@}"
-exec_prefix="${GTEST_EXEC_PREFIX:-@exec_prefix@}"
-libdir="${GTEST_LIBDIR:-@libdir@}"
-includedir="${GTEST_INCLUDEDIR:-@includedir@}"
-
-# We try and detect if our binary is not located at its installed location. If
-# it's not, we provide variables pointing to the source and build tree rather
-# than to the install tree. This allows building against a just-built gtest
-# rather than an installed gtest.
-bindir="@bindir@"
-this_relative_bindir=`dirname $0`
-this_bindir=`cd ${this_relative_bindir}; pwd -P`
-if test "${this_bindir}" = "${this_bindir%${bindir}}"; then
-  # The path to the script doesn't end in the bindir sequence from Autoconf,
-  # assume that we are in a build tree.
-  build_dir=`dirname ${this_bindir}`
-  src_dir=`cd ${this_bindir}; cd @top_srcdir@; pwd -P`
-
-  # TODO(chandlerc@google.com): This is a dangerous dependency on libtool, we
-  # should work to remove it, and/or remove libtool altogether, replacing it
-  # with direct references to the library and a link path.
-  gtest_libs="${build_dir}/lib/libgtest.la @PTHREAD_CFLAGS@ @PTHREAD_LIBS@"
-  gtest_ldflags=""
-
-  # We provide hooks to include from either the source or build dir, where the
-  # build dir is always preferred. This will potentially allow us to write
-  # build rules for generated headers and have them automatically be preferred
-  # over provided versions.
-  gtest_cppflags="-I${build_dir}/include -I${src_dir}/include"
-  gtest_cxxflags="@PTHREAD_CFLAGS@"
-else
-  # We're using an installed gtest, although it may be staged under some
-  # prefix. Assume (as our own libraries do) that we can resolve the prefix,
-  # and are present in the dynamic link paths.
-  gtest_ldflags="-L${libdir}"
-  gtest_libs="-l${name} @PTHREAD_CFLAGS@ @PTHREAD_LIBS@"
-  gtest_cppflags="-I${includedir}"
-  gtest_cxxflags="@PTHREAD_CFLAGS@"
-fi
-
-# Do an installation query if requested.
-if test -n "$do_query"; then
-  case $do_query in
-    prefix)           echo $prefix;       exit 0;;
-    exec-prefix)      echo $exec_prefix;  exit 0;;
-    libdir)           echo $libdir;       exit 0;;
-    includedir)       echo $includedir;   exit 0;;
-    version)          echo $version;      exit 0;;
-    *)                show_usage;         exit 1;;
-  esac
-fi
-
-# Do a version check if requested.
-if test "$do_check_versions" = "yes"; then
-  # Make sure we didn't receive a bad combination of parameters.
-  test "$echo_cppflags" = "yes" && show_usage && exit 1
-  test "$echo_cxxflags" = "yes" && show_usage && exit 1
-  test "$echo_ldflags" = "yes"  && show_usage && exit 1
-  test "$echo_libs" = "yes"     && show_usage && exit 1
-
-  if test "$exact_version" != ""; then
-    check_versions $exact_version $exact_version
-    # unreachable
-  else
-    check_versions ${min_version:-0.0.0} ${max_version:-9999.9999.9999}
-    # unreachable
-  fi
-fi
-
-# Do the output in the correct order so that these can be used in-line of
-# a compiler invocation.
-output=""
-test "$echo_cppflags" = "yes" && output="$output $gtest_cppflags"
-test "$echo_cxxflags" = "yes" && output="$output $gtest_cxxflags"
-test "$echo_ldflags" = "yes"  && output="$output $gtest_ldflags"
-test "$echo_libs" = "yes"     && output="$output $gtest_libs"
-echo $output
-
-exit 0
diff --git a/3rdparty/gtest/scripts/pump.py b/3rdparty/gtest/scripts/pump.py
deleted file mode 100644
index 5efb653c..00000000
--- a/3rdparty/gtest/scripts/pump.py
+++ /dev/null
@@ -1,855 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""pump v0.2.0 - Pretty Useful for Meta Programming.
-
-A tool for preprocessor meta programming.  Useful for generating
-repetitive boilerplate code.  Especially useful for writing C++
-classes, functions, macros, and templates that need to work with
-various number of arguments.
-
-USAGE:
-       pump.py SOURCE_FILE
-
-EXAMPLES:
-       pump.py foo.cc.pump
-         Converts foo.cc.pump to foo.cc.
-
-GRAMMAR:
-       CODE ::= ATOMIC_CODE*
-       ATOMIC_CODE ::= $var ID = EXPRESSION
-           | $var ID = [[ CODE ]]
-           | $range ID EXPRESSION..EXPRESSION
-           | $for ID SEPARATOR [[ CODE ]]
-           | $($)
-           | $ID
-           | $(EXPRESSION)
-           | $if EXPRESSION [[ CODE ]] ELSE_BRANCH
-           | [[ CODE ]]
-           | RAW_CODE
-       SEPARATOR ::= RAW_CODE | EMPTY
-       ELSE_BRANCH ::= $else [[ CODE ]]
-           | $elif EXPRESSION [[ CODE ]] ELSE_BRANCH
-           | EMPTY
-       EXPRESSION has Python syntax.
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import re
-import sys
-
-
-TOKEN_TABLE = [
-    (re.compile(r'\$var\s+'), '$var'),
-    (re.compile(r'\$elif\s+'), '$elif'),
-    (re.compile(r'\$else\s+'), '$else'),
-    (re.compile(r'\$for\s+'), '$for'),
-    (re.compile(r'\$if\s+'), '$if'),
-    (re.compile(r'\$range\s+'), '$range'),
-    (re.compile(r'\$[_A-Za-z]\w*'), '$id'),
-    (re.compile(r'\$\(\$\)'), '$($)'),
-    (re.compile(r'\$'), '$'),
-    (re.compile(r'\[\[\n?'), '[['),
-    (re.compile(r'\]\]\n?'), ']]'),
-    ]
-
-
-class Cursor:
-  """Represents a position (line and column) in a text file."""
-
-  def __init__(self, line=-1, column=-1):
-    self.line = line
-    self.column = column
-
-  def __eq__(self, rhs):
-    return self.line == rhs.line and self.column == rhs.column
-
-  def __ne__(self, rhs):
-    return not self == rhs
-
-  def __lt__(self, rhs):
-    return self.line < rhs.line or (
-        self.line == rhs.line and self.column < rhs.column)
-
-  def __le__(self, rhs):
-    return self < rhs or self == rhs
-
-  def __gt__(self, rhs):
-    return rhs < self
-
-  def __ge__(self, rhs):
-    return rhs <= self
-
-  def __str__(self):
-    if self == Eof():
-      return 'EOF'
-    else:
-      return '%s(%s)' % (self.line + 1, self.column)
-
-  def __add__(self, offset):
-    return Cursor(self.line, self.column + offset)
-
-  def __sub__(self, offset):
-    return Cursor(self.line, self.column - offset)
-
-  def Clone(self):
-    """Returns a copy of self."""
-
-    return Cursor(self.line, self.column)
-
-
-# Special cursor to indicate the end-of-file.
-def Eof():
-  """Returns the special cursor to denote the end-of-file."""
-  return Cursor(-1, -1)
-
-
-class Token:
-  """Represents a token in a Pump source file."""
-
-  def __init__(self, start=None, end=None, value=None, token_type=None):
-    if start is None:
-      self.start = Eof()
-    else:
-      self.start = start
-    if end is None:
-      self.end = Eof()
-    else:
-      self.end = end
-    self.value = value
-    self.token_type = token_type
-
-  def __str__(self):
-    return 'Token @%s: \'%s\' type=%s' % (
-        self.start, self.value, self.token_type)
-
-  def Clone(self):
-    """Returns a copy of self."""
-
-    return Token(self.start.Clone(), self.end.Clone(), self.value,
-                 self.token_type)
-
-
-def StartsWith(lines, pos, string):
-  """Returns True iff the given position in lines starts with 'string'."""
-
-  return lines[pos.line][pos.column:].startswith(string)
-
-
-def FindFirstInLine(line, token_table):
-  best_match_start = -1
-  for (regex, token_type) in token_table:
-    m = regex.search(line)
-    if m:
-      # We found regex in lines
-      if best_match_start < 0 or m.start() < best_match_start:
-        best_match_start = m.start()
-        best_match_length = m.end() - m.start()
-        best_match_token_type = token_type
-
-  if best_match_start < 0:
-    return None
-
-  return (best_match_start, best_match_length, best_match_token_type)
-
-
-def FindFirst(lines, token_table, cursor):
-  """Finds the first occurrence of any string in strings in lines."""
-
-  start = cursor.Clone()
-  cur_line_number = cursor.line
-  for line in lines[start.line:]:
-    if cur_line_number == start.line:
-      line = line[start.column:]
-    m = FindFirstInLine(line, token_table)
-    if m:
-      # We found a regex in line.
-      (start_column, length, token_type) = m
-      if cur_line_number == start.line:
-        start_column += start.column
-      found_start = Cursor(cur_line_number, start_column)
-      found_end = found_start + length
-      return MakeToken(lines, found_start, found_end, token_type)
-    cur_line_number += 1
-  # We failed to find str in lines
-  return None
-
-
-def SubString(lines, start, end):
-  """Returns a substring in lines."""
-
-  if end == Eof():
-    end = Cursor(len(lines) - 1, len(lines[-1]))
-
-  if start >= end:
-    return ''
-
-  if start.line == end.line:
-    return lines[start.line][start.column:end.column]
-
-  result_lines = ([lines[start.line][start.column:]] +
-                  lines[start.line + 1:end.line] +
-                  [lines[end.line][:end.column]])
-  return ''.join(result_lines)
-
-
-def StripMetaComments(str):
-  """Strip meta comments from each line in the given string."""
-
-  # First, completely remove lines containing nothing but a meta
-  # comment, including the trailing \n.
-  str = re.sub(r'^\s*\$\$.*\n', '', str)
-
-  # Then, remove meta comments from contentful lines.
-  return re.sub(r'\s*\$\$.*', '', str)
-
-
-def MakeToken(lines, start, end, token_type):
-  """Creates a new instance of Token."""
-
-  return Token(start, end, SubString(lines, start, end), token_type)
-
-
-def ParseToken(lines, pos, regex, token_type):
-  line = lines[pos.line][pos.column:]
-  m = regex.search(line)
-  if m and not m.start():
-    return MakeToken(lines, pos, pos + m.end(), token_type)
-  else:
-    print 'ERROR: %s expected at %s.' % (token_type, pos)
-    sys.exit(1)
-
-
-ID_REGEX = re.compile(r'[_A-Za-z]\w*')
-EQ_REGEX = re.compile(r'=')
-REST_OF_LINE_REGEX = re.compile(r'.*?(?=$|\$\$)')
-OPTIONAL_WHITE_SPACES_REGEX = re.compile(r'\s*')
-WHITE_SPACE_REGEX = re.compile(r'\s')
-DOT_DOT_REGEX = re.compile(r'\.\.')
-
-
-def Skip(lines, pos, regex):
-  line = lines[pos.line][pos.column:]
-  m = re.search(regex, line)
-  if m and not m.start():
-    return pos + m.end()
-  else:
-    return pos
-
-
-def SkipUntil(lines, pos, regex, token_type):
-  line = lines[pos.line][pos.column:]
-  m = re.search(regex, line)
-  if m:
-    return pos + m.start()
-  else:
-    print ('ERROR: %s expected on line %s after column %s.' %
-           (token_type, pos.line + 1, pos.column))
-    sys.exit(1)
-
-
-def ParseExpTokenInParens(lines, pos):
-  def ParseInParens(pos):
-    pos = Skip(lines, pos, OPTIONAL_WHITE_SPACES_REGEX)
-    pos = Skip(lines, pos, r'\(')
-    pos = Parse(pos)
-    pos = Skip(lines, pos, r'\)')
-    return pos
-
-  def Parse(pos):
-    pos = SkipUntil(lines, pos, r'\(|\)', ')')
-    if SubString(lines, pos, pos + 1) == '(':
-      pos = Parse(pos + 1)
-      pos = Skip(lines, pos, r'\)')
-      return Parse(pos)
-    else:
-      return pos
-
-  start = pos.Clone()
-  pos = ParseInParens(pos)
-  return MakeToken(lines, start, pos, 'exp')
-
-
-def RStripNewLineFromToken(token):
-  if token.value.endswith('\n'):
-    return Token(token.start, token.end, token.value[:-1], token.token_type)
-  else:
-    return token
-
-
-def TokenizeLines(lines, pos):
-  while True:
-    found = FindFirst(lines, TOKEN_TABLE, pos)
-    if not found:
-      yield MakeToken(lines, pos, Eof(), 'code')
-      return
-
-    if found.start == pos:
-      prev_token = None
-      prev_token_rstripped = None
-    else:
-      prev_token = MakeToken(lines, pos, found.start, 'code')
-      prev_token_rstripped = RStripNewLineFromToken(prev_token)
-
-    if found.token_type == '$var':
-      if prev_token_rstripped:
-        yield prev_token_rstripped
-      yield found
-      id_token = ParseToken(lines, found.end, ID_REGEX, 'id')
-      yield id_token
-      pos = Skip(lines, id_token.end, OPTIONAL_WHITE_SPACES_REGEX)
-
-      eq_token = ParseToken(lines, pos, EQ_REGEX, '=')
-      yield eq_token
-      pos = Skip(lines, eq_token.end, r'\s*')
-
-      if SubString(lines, pos, pos + 2) != '[[':
-        exp_token = ParseToken(lines, pos, REST_OF_LINE_REGEX, 'exp')
-        yield exp_token
-        pos = Cursor(exp_token.end.line + 1, 0)
-    elif found.token_type == '$for':
-      if prev_token_rstripped:
-        yield prev_token_rstripped
-      yield found
-      id_token = ParseToken(lines, found.end, ID_REGEX, 'id')
-      yield id_token
-      pos = Skip(lines, id_token.end, WHITE_SPACE_REGEX)
-    elif found.token_type == '$range':
-      if prev_token_rstripped:
-        yield prev_token_rstripped
-      yield found
-      id_token = ParseToken(lines, found.end, ID_REGEX, 'id')
-      yield id_token
-      pos = Skip(lines, id_token.end, OPTIONAL_WHITE_SPACES_REGEX)
-
-      dots_pos = SkipUntil(lines, pos, DOT_DOT_REGEX, '..')
-      yield MakeToken(lines, pos, dots_pos, 'exp')
-      yield MakeToken(lines, dots_pos, dots_pos + 2, '..')
-      pos = dots_pos + 2
-      new_pos = Cursor(pos.line + 1, 0)
-      yield MakeToken(lines, pos, new_pos, 'exp')
-      pos = new_pos
-    elif found.token_type == '$':
-      if prev_token:
-        yield prev_token
-      yield found
-      exp_token = ParseExpTokenInParens(lines, found.end)
-      yield exp_token
-      pos = exp_token.end
-    elif (found.token_type == ']]' or found.token_type == '$if' or
-          found.token_type == '$elif' or found.token_type == '$else'):
-      if prev_token_rstripped:
-        yield prev_token_rstripped
-      yield found
-      pos = found.end
-    else:
-      if prev_token:
-        yield prev_token
-      yield found
-      pos = found.end
-
-
-def Tokenize(s):
-  """A generator that yields the tokens in the given string."""
-  if s != '':
-    lines = s.splitlines(True)
-    for token in TokenizeLines(lines, Cursor(0, 0)):
-      yield token
-
-
-class CodeNode:
-  def __init__(self, atomic_code_list=None):
-    self.atomic_code = atomic_code_list
-
-
-class VarNode:
-  def __init__(self, identifier=None, atomic_code=None):
-    self.identifier = identifier
-    self.atomic_code = atomic_code
-
-
-class RangeNode:
-  def __init__(self, identifier=None, exp1=None, exp2=None):
-    self.identifier = identifier
-    self.exp1 = exp1
-    self.exp2 = exp2
-
-
-class ForNode:
-  def __init__(self, identifier=None, sep=None, code=None):
-    self.identifier = identifier
-    self.sep = sep
-    self.code = code
-
-
-class ElseNode:
-  def __init__(self, else_branch=None):
-    self.else_branch = else_branch
-
-
-class IfNode:
-  def __init__(self, exp=None, then_branch=None, else_branch=None):
-    self.exp = exp
-    self.then_branch = then_branch
-    self.else_branch = else_branch
-
-
-class RawCodeNode:
-  def __init__(self, token=None):
-    self.raw_code = token
-
-
-class LiteralDollarNode:
-  def __init__(self, token):
-    self.token = token
-
-
-class ExpNode:
-  def __init__(self, token, python_exp):
-    self.token = token
-    self.python_exp = python_exp
-
-
-def PopFront(a_list):
-  head = a_list[0]
-  a_list[:1] = []
-  return head
-
-
-def PushFront(a_list, elem):
-  a_list[:0] = [elem]
-
-
-def PopToken(a_list, token_type=None):
-  token = PopFront(a_list)
-  if token_type is not None and token.token_type != token_type:
-    print 'ERROR: %s expected at %s' % (token_type, token.start)
-    print 'ERROR: %s found instead' % (token,)
-    sys.exit(1)
-
-  return token
-
-
-def PeekToken(a_list):
-  if not a_list:
-    return None
-
-  return a_list[0]
-
-
-def ParseExpNode(token):
-  python_exp = re.sub(r'([_A-Za-z]\w*)', r'self.GetValue("\1")', token.value)
-  return ExpNode(token, python_exp)
-
-
-def ParseElseNode(tokens):
-  def Pop(token_type=None):
-    return PopToken(tokens, token_type)
-
-  next = PeekToken(tokens)
-  if not next:
-    return None
-  if next.token_type == '$else':
-    Pop('$else')
-    Pop('[[')
-    code_node = ParseCodeNode(tokens)
-    Pop(']]')
-    return code_node
-  elif next.token_type == '$elif':
-    Pop('$elif')
-    exp = Pop('code')
-    Pop('[[')
-    code_node = ParseCodeNode(tokens)
-    Pop(']]')
-    inner_else_node = ParseElseNode(tokens)
-    return CodeNode([IfNode(ParseExpNode(exp), code_node, inner_else_node)])
-  elif not next.value.strip():
-    Pop('code')
-    return ParseElseNode(tokens)
-  else:
-    return None
-
-
-def ParseAtomicCodeNode(tokens):
-  def Pop(token_type=None):
-    return PopToken(tokens, token_type)
-
-  head = PopFront(tokens)
-  t = head.token_type
-  if t == 'code':
-    return RawCodeNode(head)
-  elif t == '$var':
-    id_token = Pop('id')
-    Pop('=')
-    next = PeekToken(tokens)
-    if next.token_type == 'exp':
-      exp_token = Pop()
-      return VarNode(id_token, ParseExpNode(exp_token))
-    Pop('[[')
-    code_node = ParseCodeNode(tokens)
-    Pop(']]')
-    return VarNode(id_token, code_node)
-  elif t == '$for':
-    id_token = Pop('id')
-    next_token = PeekToken(tokens)
-    if next_token.token_type == 'code':
-      sep_token = next_token
-      Pop('code')
-    else:
-      sep_token = None
-    Pop('[[')
-    code_node = ParseCodeNode(tokens)
-    Pop(']]')
-    return ForNode(id_token, sep_token, code_node)
-  elif t == '$if':
-    exp_token = Pop('code')
-    Pop('[[')
-    code_node = ParseCodeNode(tokens)
-    Pop(']]')
-    else_node = ParseElseNode(tokens)
-    return IfNode(ParseExpNode(exp_token), code_node, else_node)
-  elif t == '$range':
-    id_token = Pop('id')
-    exp1_token = Pop('exp')
-    Pop('..')
-    exp2_token = Pop('exp')
-    return RangeNode(id_token, ParseExpNode(exp1_token),
-                     ParseExpNode(exp2_token))
-  elif t == '$id':
-    return ParseExpNode(Token(head.start + 1, head.end, head.value[1:], 'id'))
-  elif t == '$($)':
-    return LiteralDollarNode(head)
-  elif t == '$':
-    exp_token = Pop('exp')
-    return ParseExpNode(exp_token)
-  elif t == '[[':
-    code_node = ParseCodeNode(tokens)
-    Pop(']]')
-    return code_node
-  else:
-    PushFront(tokens, head)
-    return None
-
-
-def ParseCodeNode(tokens):
-  atomic_code_list = []
-  while True:
-    if not tokens:
-      break
-    atomic_code_node = ParseAtomicCodeNode(tokens)
-    if atomic_code_node:
-      atomic_code_list.append(atomic_code_node)
-    else:
-      break
-  return CodeNode(atomic_code_list)
-
-
-def ParseToAST(pump_src_text):
-  """Convert the given Pump source text into an AST."""
-  tokens = list(Tokenize(pump_src_text))
-  code_node = ParseCodeNode(tokens)
-  return code_node
-
-
-class Env:
-  def __init__(self):
-    self.variables = []
-    self.ranges = []
-
-  def Clone(self):
-    clone = Env()
-    clone.variables = self.variables[:]
-    clone.ranges = self.ranges[:]
-    return clone
-
-  def PushVariable(self, var, value):
-    # If value looks like an int, store it as an int.
-    try:
-      int_value = int(value)
-      if ('%s' % int_value) == value:
-        value = int_value
-    except Exception:
-      pass
-    self.variables[:0] = [(var, value)]
-
-  def PopVariable(self):
-    self.variables[:1] = []
-
-  def PushRange(self, var, lower, upper):
-    self.ranges[:0] = [(var, lower, upper)]
-
-  def PopRange(self):
-    self.ranges[:1] = []
-
-  def GetValue(self, identifier):
-    for (var, value) in self.variables:
-      if identifier == var:
-        return value
-
-    print 'ERROR: meta variable %s is undefined.' % (identifier,)
-    sys.exit(1)
-
-  def EvalExp(self, exp):
-    try:
-      result = eval(exp.python_exp)
-    except Exception, e:
-      print 'ERROR: caught exception %s: %s' % (e.__class__.__name__, e)
-      print ('ERROR: failed to evaluate meta expression %s at %s' %
-             (exp.python_exp, exp.token.start))
-      sys.exit(1)
-    return result
-
-  def GetRange(self, identifier):
-    for (var, lower, upper) in self.ranges:
-      if identifier == var:
-        return (lower, upper)
-
-    print 'ERROR: range %s is undefined.' % (identifier,)
-    sys.exit(1)
-
-
-class Output:
-  def __init__(self):
-    self.string = ''
-
-  def GetLastLine(self):
-    index = self.string.rfind('\n')
-    if index < 0:
-      return ''
-
-    return self.string[index + 1:]
-
-  def Append(self, s):
-    self.string += s
-
-
-def RunAtomicCode(env, node, output):
-  if isinstance(node, VarNode):
-    identifier = node.identifier.value.strip()
-    result = Output()
-    RunAtomicCode(env.Clone(), node.atomic_code, result)
-    value = result.string
-    env.PushVariable(identifier, value)
-  elif isinstance(node, RangeNode):
-    identifier = node.identifier.value.strip()
-    lower = int(env.EvalExp(node.exp1))
-    upper = int(env.EvalExp(node.exp2))
-    env.PushRange(identifier, lower, upper)
-  elif isinstance(node, ForNode):
-    identifier = node.identifier.value.strip()
-    if node.sep is None:
-      sep = ''
-    else:
-      sep = node.sep.value
-    (lower, upper) = env.GetRange(identifier)
-    for i in range(lower, upper + 1):
-      new_env = env.Clone()
-      new_env.PushVariable(identifier, i)
-      RunCode(new_env, node.code, output)
-      if i != upper:
-        output.Append(sep)
-  elif isinstance(node, RawCodeNode):
-    output.Append(node.raw_code.value)
-  elif isinstance(node, IfNode):
-    cond = env.EvalExp(node.exp)
-    if cond:
-      RunCode(env.Clone(), node.then_branch, output)
-    elif node.else_branch is not None:
-      RunCode(env.Clone(), node.else_branch, output)
-  elif isinstance(node, ExpNode):
-    value = env.EvalExp(node)
-    output.Append('%s' % (value,))
-  elif isinstance(node, LiteralDollarNode):
-    output.Append('$')
-  elif isinstance(node, CodeNode):
-    RunCode(env.Clone(), node, output)
-  else:
-    print 'BAD'
-    print node
-    sys.exit(1)
-
-
-def RunCode(env, code_node, output):
-  for atomic_code in code_node.atomic_code:
-    RunAtomicCode(env, atomic_code, output)
-
-
-def IsSingleLineComment(cur_line):
-  return '//' in cur_line
-
-
-def IsInPreprocessorDirective(prev_lines, cur_line):
-  if cur_line.lstrip().startswith('#'):
-    return True
-  return prev_lines and prev_lines[-1].endswith('\\')
-
-
-def WrapComment(line, output):
-  loc = line.find('//')
-  before_comment = line[:loc].rstrip()
-  if before_comment == '':
-    indent = loc
-  else:
-    output.append(before_comment)
-    indent = len(before_comment) - len(before_comment.lstrip())
-  prefix = indent*' ' + '// '
-  max_len = 80 - len(prefix)
-  comment = line[loc + 2:].strip()
-  segs = [seg for seg in re.split(r'(\w+\W*)', comment) if seg != '']
-  cur_line = ''
-  for seg in segs:
-    if len((cur_line + seg).rstrip()) < max_len:
-      cur_line += seg
-    else:
-      if cur_line.strip() != '':
-        output.append(prefix + cur_line.rstrip())
-      cur_line = seg.lstrip()
-  if cur_line.strip() != '':
-    output.append(prefix + cur_line.strip())
-
-
-def WrapCode(line, line_concat, output):
-  indent = len(line) - len(line.lstrip())
-  prefix = indent*' '  # Prefix of the current line
-  max_len = 80 - indent - len(line_concat)  # Maximum length of the current line
-  new_prefix = prefix + 4*' '  # Prefix of a continuation line
-  new_max_len = max_len - 4  # Maximum length of a continuation line
-  # Prefers to wrap a line after a ',' or ';'.
-  segs = [seg for seg in re.split(r'([^,;]+[,;]?)', line.strip()) if seg != '']
-  cur_line = ''  # The current line without leading spaces.
-  for seg in segs:
-    # If the line is still too long, wrap at a space.
-    while cur_line == '' and len(seg.strip()) > max_len:
-      seg = seg.lstrip()
-      split_at = seg.rfind(' ', 0, max_len)
-      output.append(prefix + seg[:split_at].strip() + line_concat)
-      seg = seg[split_at + 1:]
-      prefix = new_prefix
-      max_len = new_max_len
-
-    if len((cur_line + seg).rstrip()) < max_len:
-      cur_line = (cur_line + seg).lstrip()
-    else:
-      output.append(prefix + cur_line.rstrip() + line_concat)
-      prefix = new_prefix
-      max_len = new_max_len
-      cur_line = seg.lstrip()
-  if cur_line.strip() != '':
-    output.append(prefix + cur_line.strip())
-
-
-def WrapPreprocessorDirective(line, output):
-  WrapCode(line, ' \\', output)
-
-
-def WrapPlainCode(line, output):
-  WrapCode(line, '', output)
-
-
-def IsMultiLineIWYUPragma(line):
-  return re.search(r'/\* IWYU pragma: ', line)
-
-
-def IsHeaderGuardIncludeOrOneLineIWYUPragma(line):
-  return (re.match(r'^#(ifndef|define|endif\s*//)\s*[\w_]+\s*$', line) or
-          re.match(r'^#include\s', line) or
-          # Don't break IWYU pragmas, either; that causes iwyu.py problems.
-          re.search(r'// IWYU pragma: ', line))
-
-
-def WrapLongLine(line, output):
-  line = line.rstrip()
-  if len(line) <= 80:
-    output.append(line)
-  elif IsSingleLineComment(line):
-    if IsHeaderGuardIncludeOrOneLineIWYUPragma(line):
-      # The style guide made an exception to allow long header guard lines,
-      # includes and IWYU pragmas.
-      output.append(line)
-    else:
-      WrapComment(line, output)
-  elif IsInPreprocessorDirective(output, line):
-    if IsHeaderGuardIncludeOrOneLineIWYUPragma(line):
-      # The style guide made an exception to allow long header guard lines,
-      # includes and IWYU pragmas.
-      output.append(line)
-    else:
-      WrapPreprocessorDirective(line, output)
-  elif IsMultiLineIWYUPragma(line):
-    output.append(line)
-  else:
-    WrapPlainCode(line, output)
-
-
-def BeautifyCode(string):
-  lines = string.splitlines()
-  output = []
-  for line in lines:
-    WrapLongLine(line, output)
-  output2 = [line.rstrip() for line in output]
-  return '\n'.join(output2) + '\n'
-
-
-def ConvertFromPumpSource(src_text):
-  """Return the text generated from the given Pump source text."""
-  ast = ParseToAST(StripMetaComments(src_text))
-  output = Output()
-  RunCode(Env(), ast, output)
-  return BeautifyCode(output.string)
-
-
-def main(argv):
-  if len(argv) == 1:
-    print __doc__
-    sys.exit(1)
-
-  file_path = argv[-1]
-  output_str = ConvertFromPumpSource(file(file_path, 'r').read())
-  if file_path.endswith('.pump'):
-    output_file_path = file_path[:-5]
-  else:
-    output_file_path = '-'
-  if output_file_path == '-':
-    print output_str,
-  else:
-    output_file = file(output_file_path, 'w')
-    output_file.write('// This file was GENERATED by command:\n')
-    output_file.write('//     %s %s\n' %
-                      (os.path.basename(__file__), os.path.basename(file_path)))
-    output_file.write('// DO NOT EDIT BY HAND!!!\n\n')
-    output_file.write(output_str)
-    output_file.close()
-
-
-if __name__ == '__main__':
-  main(sys.argv)
diff --git a/3rdparty/gtest/scripts/release_docs.py b/3rdparty/gtest/scripts/release_docs.py
deleted file mode 100644
index 1291347f..00000000
--- a/3rdparty/gtest/scripts/release_docs.py
+++ /dev/null
@@ -1,158 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2013 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Script for branching Google Test/Mock wiki pages for a new version.
-
-SYNOPSIS
-       release_docs.py NEW_RELEASE_VERSION
-
-       Google Test and Google Mock's external user documentation is in
-       interlinked wiki files.  When we release a new version of
-       Google Test or Google Mock, we need to branch the wiki files
-       such that users of a specific version of Google Test/Mock can
-       look up documenation relevant for that version.  This script
-       automates that process by:
-
-         - branching the current wiki pages (which document the
-           behavior of the SVN trunk head) to pages for the specified
-           version (e.g. branching FAQ.wiki to V2_6_FAQ.wiki when
-           NEW_RELEASE_VERSION is 2.6);
-         - updating the links in the branched files to point to the branched
-           version (e.g. a link in V2_6_FAQ.wiki that pointed to
-           Primer.wiki#Anchor will now point to V2_6_Primer.wiki#Anchor).
-
-       NOTE: NEW_RELEASE_VERSION must be a NEW version number for
-       which the wiki pages don't yet exist; otherwise you'll get SVN
-       errors like "svn: Path 'V1_7_PumpManual.wiki' is not a
-       directory" when running the script.
-
-EXAMPLE
-       $ cd PATH/TO/GTEST_SVN_WORKSPACE/trunk
-       $ scripts/release_docs.py 2.6  # create wiki pages for v2.6
-       $ svn status                   # verify the file list
-       $ svn diff                     # verify the file contents
-       $ svn commit -m "release wiki pages for v2.6"
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import re
-import sys
-
-import common
-
-
-# Wiki pages that shouldn't be branched for every gtest/gmock release.
-GTEST_UNVERSIONED_WIKIS = ['DevGuide.wiki']
-GMOCK_UNVERSIONED_WIKIS = [
-    'DesignDoc.wiki',
-    'DevGuide.wiki',
-    'KnownIssues.wiki'
-    ]
-
-
-def DropWikiSuffix(wiki_filename):
-  """Removes the .wiki suffix (if any) from the given filename."""
-
-  return (wiki_filename[:-len('.wiki')] if wiki_filename.endswith('.wiki')
-          else wiki_filename)
-
-
-class WikiBrancher(object):
-  """Branches ..."""
-
-  def __init__(self, dot_version):
-    self.project, svn_root_path = common.GetSvnInfo()
-    if self.project not in ('googletest', 'googlemock'):
-      sys.exit('This script must be run in a gtest or gmock SVN workspace.')
-    self.wiki_dir = svn_root_path + '/wiki'
-    # Turn '2.6' to 'V2_6_'.
-    self.version_prefix = 'V' + dot_version.replace('.', '_') + '_'
-    self.files_to_branch = self.GetFilesToBranch()
-    page_names = [DropWikiSuffix(f) for f in self.files_to_branch]
-    # A link to Foo.wiki is in one of the following forms:
-    #   [Foo words]
-    #   [Foo#Anchor words]
-    #   [http://code.google.com/.../wiki/Foo words]
-    #   [http://code.google.com/.../wiki/Foo#Anchor words]
-    # We want to replace 'Foo' with 'V2_6_Foo' in the above cases.
-    self.search_for_re = re.compile(
-        # This regex matches either
-        #   [Foo
-        # or
-        #   /wiki/Foo
-        # followed by a space or a #, where Foo is the name of an
-        # unversioned wiki page.
-        r'(\[|/wiki/)(%s)([ #])' % '|'.join(page_names))
-    self.replace_with = r'\1%s\2\3' % (self.version_prefix,)
-
-  def GetFilesToBranch(self):
-    """Returns a list of .wiki file names that need to be branched."""
-
-    unversioned_wikis = (GTEST_UNVERSIONED_WIKIS if self.project == 'googletest'
-                         else GMOCK_UNVERSIONED_WIKIS)
-    return [f for f in os.listdir(self.wiki_dir)
-            if (f.endswith('.wiki') and
-                not re.match(r'^V\d', f) and  # Excluded versioned .wiki files.
-                f not in unversioned_wikis)]
-
-  def BranchFiles(self):
-    """Branches the .wiki files needed to be branched."""
-
-    print 'Branching %d .wiki files:' % (len(self.files_to_branch),)
-    os.chdir(self.wiki_dir)
-    for f in self.files_to_branch:
-      command = 'svn cp %s %s%s' % (f, self.version_prefix, f)
-      print command
-      os.system(command)
-
-  def UpdateLinksInBranchedFiles(self):
-
-    for f in self.files_to_branch:
-      source_file = os.path.join(self.wiki_dir, f)
-      versioned_file = os.path.join(self.wiki_dir, self.version_prefix + f)
-      print 'Updating links in %s.' % (versioned_file,)
-      text = file(source_file, 'r').read()
-      new_text = self.search_for_re.sub(self.replace_with, text)
-      file(versioned_file, 'w').write(new_text)
-
-
-def main():
-  if len(sys.argv) != 2:
-    sys.exit(__doc__)
-
-  brancher = WikiBrancher(sys.argv[1])
-  brancher.BranchFiles()
-  brancher.UpdateLinksInBranchedFiles()
-
-
-if __name__ == '__main__':
-  main()
diff --git a/3rdparty/gtest/scripts/upload.py b/3rdparty/gtest/scripts/upload.py
deleted file mode 100644
index c852e4c9..00000000
--- a/3rdparty/gtest/scripts/upload.py
+++ /dev/null
@@ -1,1387 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2007 Google Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Tool for uploading diffs from a version control system to the codereview app.
-
-Usage summary: upload.py [options] [-- diff_options]
-
-Diff options are passed to the diff command of the underlying system.
-
-Supported version control systems:
-  Git
-  Mercurial
-  Subversion
-
-It is important for Git/Mercurial users to specify a tree/node/branch to diff
-against by using the '--rev' option.
-"""
-# This code is derived from appcfg.py in the App Engine SDK (open source),
-# and from ASPN recipe #146306.
-
-import cookielib
-import getpass
-import logging
-import md5
-import mimetypes
-import optparse
-import os
-import re
-import socket
-import subprocess
-import sys
-import urllib
-import urllib2
-import urlparse
-
-try:
-  import readline
-except ImportError:
-  pass
-
-# The logging verbosity:
-#  0: Errors only.
-#  1: Status messages.
-#  2: Info logs.
-#  3: Debug logs.
-verbosity = 1
-
-# Max size of patch or base file.
-MAX_UPLOAD_SIZE = 900 * 1024
-
-
-def GetEmail(prompt):
-  """Prompts the user for their email address and returns it.
-
-  The last used email address is saved to a file and offered up as a suggestion
-  to the user. If the user presses enter without typing in anything the last
-  used email address is used. If the user enters a new address, it is saved
-  for next time we prompt.
-
-  """
-  last_email_file_name = os.path.expanduser("~/.last_codereview_email_address")
-  last_email = ""
-  if os.path.exists(last_email_file_name):
-    try:
-      last_email_file = open(last_email_file_name, "r")
-      last_email = last_email_file.readline().strip("\n")
-      last_email_file.close()
-      prompt += " [%s]" % last_email
-    except IOError, e:
-      pass
-  email = raw_input(prompt + ": ").strip()
-  if email:
-    try:
-      last_email_file = open(last_email_file_name, "w")
-      last_email_file.write(email)
-      last_email_file.close()
-    except IOError, e:
-      pass
-  else:
-    email = last_email
-  return email
-
-
-def StatusUpdate(msg):
-  """Print a status message to stdout.
-
-  If 'verbosity' is greater than 0, print the message.
-
-  Args:
-    msg: The string to print.
-  """
-  if verbosity > 0:
-    print msg
-
-
-def ErrorExit(msg):
-  """Print an error message to stderr and exit."""
-  print >>sys.stderr, msg
-  sys.exit(1)
-
-
-class ClientLoginError(urllib2.HTTPError):
-  """Raised to indicate there was an error authenticating with ClientLogin."""
-
-  def __init__(self, url, code, msg, headers, args):
-    urllib2.HTTPError.__init__(self, url, code, msg, headers, None)
-    self.args = args
-    self.reason = args["Error"]
-
-
-class AbstractRpcServer(object):
-  """Provides a common interface for a simple RPC server."""
-
-  def __init__(self, host, auth_function, host_override=None, extra_headers={},
-               save_cookies=False):
-    """Creates a new HttpRpcServer.
-
-    Args:
-      host: The host to send requests to.
-      auth_function: A function that takes no arguments and returns an
-        (email, password) tuple when called. Will be called if authentication
-        is required.
-      host_override: The host header to send to the server (defaults to host).
-      extra_headers: A dict of extra headers to append to every request.
-      save_cookies: If True, save the authentication cookies to local disk.
-        If False, use an in-memory cookiejar instead.  Subclasses must
-        implement this functionality.  Defaults to False.
-    """
-    self.host = host
-    self.host_override = host_override
-    self.auth_function = auth_function
-    self.authenticated = False
-    self.extra_headers = extra_headers
-    self.save_cookies = save_cookies
-    self.opener = self._GetOpener()
-    if self.host_override:
-      logging.info("Server: %s; Host: %s", self.host, self.host_override)
-    else:
-      logging.info("Server: %s", self.host)
-
-  def _GetOpener(self):
-    """Returns an OpenerDirector for making HTTP requests.
-
-    Returns:
-      A urllib2.OpenerDirector object.
-    """
-    raise NotImplementedError()
-
-  def _CreateRequest(self, url, data=None):
-    """Creates a new urllib request."""
-    logging.debug("Creating request for: '%s' with payload:\n%s", url, data)
-    req = urllib2.Request(url, data=data)
-    if self.host_override:
-      req.add_header("Host", self.host_override)
-    for key, value in self.extra_headers.iteritems():
-      req.add_header(key, value)
-    return req
-
-  def _GetAuthToken(self, email, password):
-    """Uses ClientLogin to authenticate the user, returning an auth token.
-
-    Args:
-      email:    The user's email address
-      password: The user's password
-
-    Raises:
-      ClientLoginError: If there was an error authenticating with ClientLogin.
-      HTTPError: If there was some other form of HTTP error.
-
-    Returns:
-      The authentication token returned by ClientLogin.
-    """
-    account_type = "GOOGLE"
-    if self.host.endswith(".google.com"):
-      # Needed for use inside Google.
-      account_type = "HOSTED"
-    req = self._CreateRequest(
-        url="https://www.google.com/accounts/ClientLogin",
-        data=urllib.urlencode({
-            "Email": email,
-            "Passwd": password,
-            "service": "ah",
-            "source": "rietveld-codereview-upload",
-            "accountType": account_type,
-        }),
-    )
-    try:
-      response = self.opener.open(req)
-      response_body = response.read()
-      response_dict = dict(x.split("=")
-                           for x in response_body.split("\n") if x)
-      return response_dict["Auth"]
-    except urllib2.HTTPError, e:
-      if e.code == 403:
-        body = e.read()
-        response_dict = dict(x.split("=", 1) for x in body.split("\n") if x)
-        raise ClientLoginError(req.get_full_url(), e.code, e.msg,
-                               e.headers, response_dict)
-      else:
-        raise
-
-  def _GetAuthCookie(self, auth_token):
-    """Fetches authentication cookies for an authentication token.
-
-    Args:
-      auth_token: The authentication token returned by ClientLogin.
-
-    Raises:
-      HTTPError: If there was an error fetching the authentication cookies.
-    """
-    # This is a dummy value to allow us to identify when we're successful.
-    continue_location = "http://localhost/"
-    args = {"continue": continue_location, "auth": auth_token}
-    req = self._CreateRequest("http://%s/_ah/login?%s" %
-                              (self.host, urllib.urlencode(args)))
-    try:
-      response = self.opener.open(req)
-    except urllib2.HTTPError, e:
-      response = e
-    if (response.code != 302 or
-        response.info()["location"] != continue_location):
-      raise urllib2.HTTPError(req.get_full_url(), response.code, response.msg,
-                              response.headers, response.fp)
-    self.authenticated = True
-
-  def _Authenticate(self):
-    """Authenticates the user.
-
-    The authentication process works as follows:
-     1) We get a username and password from the user
-     2) We use ClientLogin to obtain an AUTH token for the user
-        (see https://developers.google.com/identity/protocols/AuthForInstalledApps).
-     3) We pass the auth token to /_ah/login on the server to obtain an
-        authentication cookie. If login was successful, it tries to redirect
-        us to the URL we provided.
-
-    If we attempt to access the upload API without first obtaining an
-    authentication cookie, it returns a 401 response and directs us to
-    authenticate ourselves with ClientLogin.
-    """
-    for i in range(3):
-      credentials = self.auth_function()
-      try:
-        auth_token = self._GetAuthToken(credentials[0], credentials[1])
-      except ClientLoginError, e:
-        if e.reason == "BadAuthentication":
-          print >>sys.stderr, "Invalid username or password."
-          continue
-        if e.reason == "CaptchaRequired":
-          print >>sys.stderr, (
-              "Please go to\n"
-              "https://www.google.com/accounts/DisplayUnlockCaptcha\n"
-              "and verify you are a human.  Then try again.")
-          break
-        if e.reason == "NotVerified":
-          print >>sys.stderr, "Account not verified."
-          break
-        if e.reason == "TermsNotAgreed":
-          print >>sys.stderr, "User has not agreed to TOS."
-          break
-        if e.reason == "AccountDeleted":
-          print >>sys.stderr, "The user account has been deleted."
-          break
-        if e.reason == "AccountDisabled":
-          print >>sys.stderr, "The user account has been disabled."
-          break
-        if e.reason == "ServiceDisabled":
-          print >>sys.stderr, ("The user's access to the service has been "
-                               "disabled.")
-          break
-        if e.reason == "ServiceUnavailable":
-          print >>sys.stderr, "The service is not available; try again later."
-          break
-        raise
-      self._GetAuthCookie(auth_token)
-      return
-
-  def Send(self, request_path, payload=None,
-           content_type="application/octet-stream",
-           timeout=None,
-           **kwargs):
-    """Sends an RPC and returns the response.
-
-    Args:
-      request_path: The path to send the request to, eg /api/appversion/create.
-      payload: The body of the request, or None to send an empty request.
-      content_type: The Content-Type header to use.
-      timeout: timeout in seconds; default None i.e. no timeout.
-        (Note: for large requests on OS X, the timeout doesn't work right.)
-      kwargs: Any keyword arguments are converted into query string parameters.
-
-    Returns:
-      The response body, as a string.
-    """
-    # TODO: Don't require authentication.  Let the server say
-    # whether it is necessary.
-    if not self.authenticated:
-      self._Authenticate()
-
-    old_timeout = socket.getdefaulttimeout()
-    socket.setdefaulttimeout(timeout)
-    try:
-      tries = 0
-      while True:
-        tries += 1
-        args = dict(kwargs)
-        url = "http://%s%s" % (self.host, request_path)
-        if args:
-          url += "?" + urllib.urlencode(args)
-        req = self._CreateRequest(url=url, data=payload)
-        req.add_header("Content-Type", content_type)
-        try:
-          f = self.opener.open(req)
-          response = f.read()
-          f.close()
-          return response
-        except urllib2.HTTPError, e:
-          if tries > 3:
-            raise
-          elif e.code == 401:
-            self._Authenticate()
-##           elif e.code >= 500 and e.code < 600:
-##             # Server Error - try again.
-##             continue
-          else:
-            raise
-    finally:
-      socket.setdefaulttimeout(old_timeout)
-
-
-class HttpRpcServer(AbstractRpcServer):
-  """Provides a simplified RPC-style interface for HTTP requests."""
-
-  def _Authenticate(self):
-    """Save the cookie jar after authentication."""
-    super(HttpRpcServer, self)._Authenticate()
-    if self.save_cookies:
-      StatusUpdate("Saving authentication cookies to %s" % self.cookie_file)
-      self.cookie_jar.save()
-
-  def _GetOpener(self):
-    """Returns an OpenerDirector that supports cookies and ignores redirects.
-
-    Returns:
-      A urllib2.OpenerDirector object.
-    """
-    opener = urllib2.OpenerDirector()
-    opener.add_handler(urllib2.ProxyHandler())
-    opener.add_handler(urllib2.UnknownHandler())
-    opener.add_handler(urllib2.HTTPHandler())
-    opener.add_handler(urllib2.HTTPDefaultErrorHandler())
-    opener.add_handler(urllib2.HTTPSHandler())
-    opener.add_handler(urllib2.HTTPErrorProcessor())
-    if self.save_cookies:
-      self.cookie_file = os.path.expanduser("~/.codereview_upload_cookies")
-      self.cookie_jar = cookielib.MozillaCookieJar(self.cookie_file)
-      if os.path.exists(self.cookie_file):
-        try:
-          self.cookie_jar.load()
-          self.authenticated = True
-          StatusUpdate("Loaded authentication cookies from %s" %
-                       self.cookie_file)
-        except (cookielib.LoadError, IOError):
-          # Failed to load cookies - just ignore them.
-          pass
-      else:
-        # Create an empty cookie file with mode 600
-        fd = os.open(self.cookie_file, os.O_CREAT, 0600)
-        os.close(fd)
-      # Always chmod the cookie file
-      os.chmod(self.cookie_file, 0600)
-    else:
-      # Don't save cookies across runs of update.py.
-      self.cookie_jar = cookielib.CookieJar()
-    opener.add_handler(urllib2.HTTPCookieProcessor(self.cookie_jar))
-    return opener
-
-
-parser = optparse.OptionParser(usage="%prog [options] [-- diff_options]")
-parser.add_option("-y", "--assume_yes", action="store_true",
-                  dest="assume_yes", default=False,
-                  help="Assume that the answer to yes/no questions is 'yes'.")
-# Logging
-group = parser.add_option_group("Logging options")
-group.add_option("-q", "--quiet", action="store_const", const=0,
-                 dest="verbose", help="Print errors only.")
-group.add_option("-v", "--verbose", action="store_const", const=2,
-                 dest="verbose", default=1,
-                 help="Print info level logs (default).")
-group.add_option("--noisy", action="store_const", const=3,
-                 dest="verbose", help="Print all logs.")
-# Review server
-group = parser.add_option_group("Review server options")
-group.add_option("-s", "--server", action="store", dest="server",
-                 default="codereview.appspot.com",
-                 metavar="SERVER",
-                 help=("The server to upload to. The format is host[:port]. "
-                       "Defaults to 'codereview.appspot.com'."))
-group.add_option("-e", "--email", action="store", dest="email",
-                 metavar="EMAIL", default=None,
-                 help="The username to use. Will prompt if omitted.")
-group.add_option("-H", "--host", action="store", dest="host",
-                 metavar="HOST", default=None,
-                 help="Overrides the Host header sent with all RPCs.")
-group.add_option("--no_cookies", action="store_false",
-                 dest="save_cookies", default=True,
-                 help="Do not save authentication cookies to local disk.")
-# Issue
-group = parser.add_option_group("Issue options")
-group.add_option("-d", "--description", action="store", dest="description",
-                 metavar="DESCRIPTION", default=None,
-                 help="Optional description when creating an issue.")
-group.add_option("-f", "--description_file", action="store",
-                 dest="description_file", metavar="DESCRIPTION_FILE",
-                 default=None,
-                 help="Optional path of a file that contains "
-                      "the description when creating an issue.")
-group.add_option("-r", "--reviewers", action="store", dest="reviewers",
-                 metavar="REVIEWERS", default=None,
-                 help="Add reviewers (comma separated email addresses).")
-group.add_option("--cc", action="store", dest="cc",
-                 metavar="CC", default=None,
-                 help="Add CC (comma separated email addresses).")
-# Upload options
-group = parser.add_option_group("Patch options")
-group.add_option("-m", "--message", action="store", dest="message",
-                 metavar="MESSAGE", default=None,
-                 help="A message to identify the patch. "
-                      "Will prompt if omitted.")
-group.add_option("-i", "--issue", type="int", action="store",
-                 metavar="ISSUE", default=None,
-                 help="Issue number to which to add. Defaults to new issue.")
-group.add_option("--download_base", action="store_true",
-                 dest="download_base", default=False,
-                 help="Base files will be downloaded by the server "
-                 "(side-by-side diffs may not work on files with CRs).")
-group.add_option("--rev", action="store", dest="revision",
-                 metavar="REV", default=None,
-                 help="Branch/tree/revision to diff against (used by DVCS).")
-group.add_option("--send_mail", action="store_true",
-                 dest="send_mail", default=False,
-                 help="Send notification email to reviewers.")
-
-
-def GetRpcServer(options):
-  """Returns an instance of an AbstractRpcServer.
-
-  Returns:
-    A new AbstractRpcServer, on which RPC calls can be made.
-  """
-
-  rpc_server_class = HttpRpcServer
-
-  def GetUserCredentials():
-    """Prompts the user for a username and password."""
-    email = options.email
-    if email is None:
-      email = GetEmail("Email (login for uploading to %s)" % options.server)
-    password = getpass.getpass("Password for %s: " % email)
-    return (email, password)
-
-  # If this is the dev_appserver, use fake authentication.
-  host = (options.host or options.server).lower()
-  if host == "localhost" or host.startswith("localhost:"):
-    email = options.email
-    if email is None:
-      email = "test@example.com"
-      logging.info("Using debug user %s.  Override with --email" % email)
-    server = rpc_server_class(
-        options.server,
-        lambda: (email, "password"),
-        host_override=options.host,
-        extra_headers={"Cookie":
-                       'dev_appserver_login="%s:False"' % email},
-        save_cookies=options.save_cookies)
-    # Don't try to talk to ClientLogin.
-    server.authenticated = True
-    return server
-
-  return rpc_server_class(options.server, GetUserCredentials,
-                          host_override=options.host,
-                          save_cookies=options.save_cookies)
-
-
-def EncodeMultipartFormData(fields, files):
-  """Encode form fields for multipart/form-data.
-
-  Args:
-    fields: A sequence of (name, value) elements for regular form fields.
-    files: A sequence of (name, filename, value) elements for data to be
-           uploaded as files.
-  Returns:
-    (content_type, body) ready for httplib.HTTP instance.
-
-  Source:
-    https://web.archive.org/web/20160116052001/code.activestate.com/recipes/146306
-  """
-  BOUNDARY = '-M-A-G-I-C---B-O-U-N-D-A-R-Y-'
-  CRLF = '\r\n'
-  lines = []
-  for (key, value) in fields:
-    lines.append('--' + BOUNDARY)
-    lines.append('Content-Disposition: form-data; name="%s"' % key)
-    lines.append('')
-    lines.append(value)
-  for (key, filename, value) in files:
-    lines.append('--' + BOUNDARY)
-    lines.append('Content-Disposition: form-data; name="%s"; filename="%s"' %
-             (key, filename))
-    lines.append('Content-Type: %s' % GetContentType(filename))
-    lines.append('')
-    lines.append(value)
-  lines.append('--' + BOUNDARY + '--')
-  lines.append('')
-  body = CRLF.join(lines)
-  content_type = 'multipart/form-data; boundary=%s' % BOUNDARY
-  return content_type, body
-
-
-def GetContentType(filename):
-  """Helper to guess the content-type from the filename."""
-  return mimetypes.guess_type(filename)[0] or 'application/octet-stream'
-
-
-# Use a shell for subcommands on Windows to get a PATH search.
-use_shell = sys.platform.startswith("win")
-
-def RunShellWithReturnCode(command, print_output=False,
-                           universal_newlines=True):
-  """Executes a command and returns the output from stdout and the return code.
-
-  Args:
-    command: Command to execute.
-    print_output: If True, the output is printed to stdout.
-                  If False, both stdout and stderr are ignored.
-    universal_newlines: Use universal_newlines flag (default: True).
-
-  Returns:
-    Tuple (output, return code)
-  """
-  logging.info("Running %s", command)
-  p = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
-                       shell=use_shell, universal_newlines=universal_newlines)
-  if print_output:
-    output_array = []
-    while True:
-      line = p.stdout.readline()
-      if not line:
-        break
-      print line.strip("\n")
-      output_array.append(line)
-    output = "".join(output_array)
-  else:
-    output = p.stdout.read()
-  p.wait()
-  errout = p.stderr.read()
-  if print_output and errout:
-    print >>sys.stderr, errout
-  p.stdout.close()
-  p.stderr.close()
-  return output, p.returncode
-
-
-def RunShell(command, silent_ok=False, universal_newlines=True,
-             print_output=False):
-  data, retcode = RunShellWithReturnCode(command, print_output,
-                                         universal_newlines)
-  if retcode:
-    ErrorExit("Got error status from %s:\n%s" % (command, data))
-  if not silent_ok and not data:
-    ErrorExit("No output from %s" % command)
-  return data
-
-
-class VersionControlSystem(object):
-  """Abstract base class providing an interface to the VCS."""
-
-  def __init__(self, options):
-    """Constructor.
-
-    Args:
-      options: Command line options.
-    """
-    self.options = options
-
-  def GenerateDiff(self, args):
-    """Return the current diff as a string.
-
-    Args:
-      args: Extra arguments to pass to the diff command.
-    """
-    raise NotImplementedError(
-        "abstract method -- subclass %s must override" % self.__class__)
-
-  def GetUnknownFiles(self):
-    """Return a list of files unknown to the VCS."""
-    raise NotImplementedError(
-        "abstract method -- subclass %s must override" % self.__class__)
-
-  def CheckForUnknownFiles(self):
-    """Show an "are you sure?" prompt if there are unknown files."""
-    unknown_files = self.GetUnknownFiles()
-    if unknown_files:
-      print "The following files are not added to version control:"
-      for line in unknown_files:
-        print line
-      prompt = "Are you sure to continue?(y/N) "
-      answer = raw_input(prompt).strip()
-      if answer != "y":
-        ErrorExit("User aborted")
-
-  def GetBaseFile(self, filename):
-    """Get the content of the upstream version of a file.
-
-    Returns:
-      A tuple (base_content, new_content, is_binary, status)
-        base_content: The contents of the base file.
-        new_content: For text files, this is empty.  For binary files, this is
-          the contents of the new file, since the diff output won't contain
-          information to reconstruct the current file.
-        is_binary: True iff the file is binary.
-        status: The status of the file.
-    """
-
-    raise NotImplementedError(
-        "abstract method -- subclass %s must override" % self.__class__)
-
-
-  def GetBaseFiles(self, diff):
-    """Helper that calls GetBase file for each file in the patch.
-
-    Returns:
-      A dictionary that maps from filename to GetBaseFile's tuple.  Filenames
-      are retrieved based on lines that start with "Index:" or
-      "Property changes on:".
-    """
-    files = {}
-    for line in diff.splitlines(True):
-      if line.startswith('Index:') or line.startswith('Property changes on:'):
-        unused, filename = line.split(':', 1)
-        # On Windows if a file has property changes its filename uses '\'
-        # instead of '/'.
-        filename = filename.strip().replace('\\', '/')
-        files[filename] = self.GetBaseFile(filename)
-    return files
-
-
-  def UploadBaseFiles(self, issue, rpc_server, patch_list, patchset, options,
-                      files):
-    """Uploads the base files (and if necessary, the current ones as well)."""
-
-    def UploadFile(filename, file_id, content, is_binary, status, is_base):
-      """Uploads a file to the server."""
-      file_too_large = False
-      if is_base:
-        type = "base"
-      else:
-        type = "current"
-      if len(content) > MAX_UPLOAD_SIZE:
-        print ("Not uploading the %s file for %s because it's too large." %
-               (type, filename))
-        file_too_large = True
-        content = ""
-      checksum = md5.new(content).hexdigest()
-      if options.verbose > 0 and not file_too_large:
-        print "Uploading %s file for %s" % (type, filename)
-      url = "/%d/upload_content/%d/%d" % (int(issue), int(patchset), file_id)
-      form_fields = [("filename", filename),
-                     ("status", status),
-                     ("checksum", checksum),
-                     ("is_binary", str(is_binary)),
-                     ("is_current", str(not is_base)),
-                    ]
-      if file_too_large:
-        form_fields.append(("file_too_large", "1"))
-      if options.email:
-        form_fields.append(("user", options.email))
-      ctype, body = EncodeMultipartFormData(form_fields,
-                                            [("data", filename, content)])
-      response_body = rpc_server.Send(url, body,
-                                      content_type=ctype)
-      if not response_body.startswith("OK"):
-        StatusUpdate("  --> %s" % response_body)
-        sys.exit(1)
-
-    patches = dict()
-    [patches.setdefault(v, k) for k, v in patch_list]
-    for filename in patches.keys():
-      base_content, new_content, is_binary, status = files[filename]
-      file_id_str = patches.get(filename)
-      if file_id_str.find("nobase") != -1:
-        base_content = None
-        file_id_str = file_id_str[file_id_str.rfind("_") + 1:]
-      file_id = int(file_id_str)
-      if base_content != None:
-        UploadFile(filename, file_id, base_content, is_binary, status, True)
-      if new_content != None:
-        UploadFile(filename, file_id, new_content, is_binary, status, False)
-
-  def IsImage(self, filename):
-    """Returns true if the filename has an image extension."""
-    mimetype =  mimetypes.guess_type(filename)[0]
-    if not mimetype:
-      return False
-    return mimetype.startswith("image/")
-
-
-class SubversionVCS(VersionControlSystem):
-  """Implementation of the VersionControlSystem interface for Subversion."""
-
-  def __init__(self, options):
-    super(SubversionVCS, self).__init__(options)
-    if self.options.revision:
-      match = re.match(r"(\d+)(:(\d+))?", self.options.revision)
-      if not match:
-        ErrorExit("Invalid Subversion revision %s." % self.options.revision)
-      self.rev_start = match.group(1)
-      self.rev_end = match.group(3)
-    else:
-      self.rev_start = self.rev_end = None
-    # Cache output from "svn list -r REVNO dirname".
-    # Keys: dirname, Values: 2-tuple (output for start rev and end rev).
-    self.svnls_cache = {}
-    # SVN base URL is required to fetch files deleted in an older revision.
-    # Result is cached to not guess it over and over again in GetBaseFile().
-    required = self.options.download_base or self.options.revision is not None
-    self.svn_base = self._GuessBase(required)
-
-  def GuessBase(self, required):
-    """Wrapper for _GuessBase."""
-    return self.svn_base
-
-  def _GuessBase(self, required):
-    """Returns the SVN base URL.
-
-    Args:
-      required: If true, exits if the url can't be guessed, otherwise None is
-        returned.
-    """
-    info = RunShell(["svn", "info"])
-    for line in info.splitlines():
-      words = line.split()
-      if len(words) == 2 and words[0] == "URL:":
-        url = words[1]
-        scheme, netloc, path, params, query, fragment = urlparse.urlparse(url)
-        username, netloc = urllib.splituser(netloc)
-        if username:
-          logging.info("Removed username from base URL")
-        if netloc.endswith("svn.python.org"):
-          if netloc == "svn.python.org":
-            if path.startswith("/projects/"):
-              path = path[9:]
-          elif netloc != "pythondev@svn.python.org":
-            ErrorExit("Unrecognized Python URL: %s" % url)
-          base = "http://svn.python.org/view/*checkout*%s/" % path
-          logging.info("Guessed Python base = %s", base)
-        elif netloc.endswith("svn.collab.net"):
-          if path.startswith("/repos/"):
-            path = path[6:]
-          base = "http://svn.collab.net/viewvc/*checkout*%s/" % path
-          logging.info("Guessed CollabNet base = %s", base)
-        elif netloc.endswith(".googlecode.com"):
-          path = path + "/"
-          base = urlparse.urlunparse(("http", netloc, path, params,
-                                      query, fragment))
-          logging.info("Guessed Google Code base = %s", base)
-        else:
-          path = path + "/"
-          base = urlparse.urlunparse((scheme, netloc, path, params,
-                                      query, fragment))
-          logging.info("Guessed base = %s", base)
-        return base
-    if required:
-      ErrorExit("Can't find URL in output from svn info")
-    return None
-
-  def GenerateDiff(self, args):
-    cmd = ["svn", "diff"]
-    if self.options.revision:
-      cmd += ["-r", self.options.revision]
-    cmd.extend(args)
-    data = RunShell(cmd)
-    count = 0
-    for line in data.splitlines():
-      if line.startswith("Index:") or line.startswith("Property changes on:"):
-        count += 1
-        logging.info(line)
-    if not count:
-      ErrorExit("No valid patches found in output from svn diff")
-    return data
-
-  def _CollapseKeywords(self, content, keyword_str):
-    """Collapses SVN keywords."""
-    # svn cat translates keywords but svn diff doesn't. As a result of this
-    # behavior patching.PatchChunks() fails with a chunk mismatch error.
-    # This part was originally written by the Review Board development team
-    # who had the same problem (https://reviews.reviewboard.org/r/276/).
-    # Mapping of keywords to known aliases
-    svn_keywords = {
-      # Standard keywords
-      'Date':                ['Date', 'LastChangedDate'],
-      'Revision':            ['Revision', 'LastChangedRevision', 'Rev'],
-      'Author':              ['Author', 'LastChangedBy'],
-      'HeadURL':             ['HeadURL', 'URL'],
-      'Id':                  ['Id'],
-
-      # Aliases
-      'LastChangedDate':     ['LastChangedDate', 'Date'],
-      'LastChangedRevision': ['LastChangedRevision', 'Rev', 'Revision'],
-      'LastChangedBy':       ['LastChangedBy', 'Author'],
-      'URL':                 ['URL', 'HeadURL'],
-    }
-
-    def repl(m):
-       if m.group(2):
-         return "$%s::%s$" % (m.group(1), " " * len(m.group(3)))
-       return "$%s$" % m.group(1)
-    keywords = [keyword
-                for name in keyword_str.split(" ")
-                for keyword in svn_keywords.get(name, [])]
-    return re.sub(r"\$(%s):(:?)([^\$]+)\$" % '|'.join(keywords), repl, content)
-
-  def GetUnknownFiles(self):
-    status = RunShell(["svn", "status", "--ignore-externals"], silent_ok=True)
-    unknown_files = []
-    for line in status.split("\n"):
-      if line and line[0] == "?":
-        unknown_files.append(line)
-    return unknown_files
-
-  def ReadFile(self, filename):
-    """Returns the contents of a file."""
-    file = open(filename, 'rb')
-    result = ""
-    try:
-      result = file.read()
-    finally:
-      file.close()
-    return result
-
-  def GetStatus(self, filename):
-    """Returns the status of a file."""
-    if not self.options.revision:
-      status = RunShell(["svn", "status", "--ignore-externals", filename])
-      if not status:
-        ErrorExit("svn status returned no output for %s" % filename)
-      status_lines = status.splitlines()
-      # If file is in a cl, the output will begin with
-      # "\n--- Changelist 'cl_name':\n".  See
-      # https://web.archive.org/web/20090918234815/svn.collab.net/repos/svn/trunk/notes/changelist-design.txt
-      if (len(status_lines) == 3 and
-          not status_lines[0] and
-          status_lines[1].startswith("--- Changelist")):
-        status = status_lines[2]
-      else:
-        status = status_lines[0]
-    # If we have a revision to diff against we need to run "svn list"
-    # for the old and the new revision and compare the results to get
-    # the correct status for a file.
-    else:
-      dirname, relfilename = os.path.split(filename)
-      if dirname not in self.svnls_cache:
-        cmd = ["svn", "list", "-r", self.rev_start, dirname or "."]
-        out, returncode = RunShellWithReturnCode(cmd)
-        if returncode:
-          ErrorExit("Failed to get status for %s." % filename)
-        old_files = out.splitlines()
-        args = ["svn", "list"]
-        if self.rev_end:
-          args += ["-r", self.rev_end]
-        cmd = args + [dirname or "."]
-        out, returncode = RunShellWithReturnCode(cmd)
-        if returncode:
-          ErrorExit("Failed to run command %s" % cmd)
-        self.svnls_cache[dirname] = (old_files, out.splitlines())
-      old_files, new_files = self.svnls_cache[dirname]
-      if relfilename in old_files and relfilename not in new_files:
-        status = "D   "
-      elif relfilename in old_files and relfilename in new_files:
-        status = "M   "
-      else:
-        status = "A   "
-    return status
-
-  def GetBaseFile(self, filename):
-    status = self.GetStatus(filename)
-    base_content = None
-    new_content = None
-
-    # If a file is copied its status will be "A  +", which signifies
-    # "addition-with-history".  See "svn st" for more information.  We need to
-    # upload the original file or else diff parsing will fail if the file was
-    # edited.
-    if status[0] == "A" and status[3] != "+":
-      # We'll need to upload the new content if we're adding a binary file
-      # since diff's output won't contain it.
-      mimetype = RunShell(["svn", "propget", "svn:mime-type", filename],
-                          silent_ok=True)
-      base_content = ""
-      is_binary = mimetype and not mimetype.startswith("text/")
-      if is_binary and self.IsImage(filename):
-        new_content = self.ReadFile(filename)
-    elif (status[0] in ("M", "D", "R") or
-          (status[0] == "A" and status[3] == "+") or  # Copied file.
-          (status[0] == " " and status[1] == "M")):  # Property change.
-      args = []
-      if self.options.revision:
-        url = "%s/%s@%s" % (self.svn_base, filename, self.rev_start)
-      else:
-        # Don't change filename, it's needed later.
-        url = filename
-        args += ["-r", "BASE"]
-      cmd = ["svn"] + args + ["propget", "svn:mime-type", url]
-      mimetype, returncode = RunShellWithReturnCode(cmd)
-      if returncode:
-        # File does not exist in the requested revision.
-        # Reset mimetype, it contains an error message.
-        mimetype = ""
-      get_base = False
-      is_binary = mimetype and not mimetype.startswith("text/")
-      if status[0] == " ":
-        # Empty base content just to force an upload.
-        base_content = ""
-      elif is_binary:
-        if self.IsImage(filename):
-          get_base = True
-          if status[0] == "M":
-            if not self.rev_end:
-              new_content = self.ReadFile(filename)
-            else:
-              url = "%s/%s@%s" % (self.svn_base, filename, self.rev_end)
-              new_content = RunShell(["svn", "cat", url],
-                                     universal_newlines=True, silent_ok=True)
-        else:
-          base_content = ""
-      else:
-        get_base = True
-
-      if get_base:
-        if is_binary:
-          universal_newlines = False
-        else:
-          universal_newlines = True
-        if self.rev_start:
-          # "svn cat -r REV delete_file.txt" doesn't work. cat requires
-          # the full URL with "@REV" appended instead of using "-r" option.
-          url = "%s/%s@%s" % (self.svn_base, filename, self.rev_start)
-          base_content = RunShell(["svn", "cat", url],
-                                  universal_newlines=universal_newlines,
-                                  silent_ok=True)
-        else:
-          base_content = RunShell(["svn", "cat", filename],
-                                  universal_newlines=universal_newlines,
-                                  silent_ok=True)
-        if not is_binary:
-          args = []
-          if self.rev_start:
-            url = "%s/%s@%s" % (self.svn_base, filename, self.rev_start)
-          else:
-            url = filename
-            args += ["-r", "BASE"]
-          cmd = ["svn"] + args + ["propget", "svn:keywords", url]
-          keywords, returncode = RunShellWithReturnCode(cmd)
-          if keywords and not returncode:
-            base_content = self._CollapseKeywords(base_content, keywords)
-    else:
-      StatusUpdate("svn status returned unexpected output: %s" % status)
-      sys.exit(1)
-    return base_content, new_content, is_binary, status[0:5]
-
-
-class GitVCS(VersionControlSystem):
-  """Implementation of the VersionControlSystem interface for Git."""
-
-  def __init__(self, options):
-    super(GitVCS, self).__init__(options)
-    # Map of filename -> hash of base file.
-    self.base_hashes = {}
-
-  def GenerateDiff(self, extra_args):
-    # This is more complicated than svn's GenerateDiff because we must convert
-    # the diff output to include an svn-style "Index:" line as well as record
-    # the hashes of the base files, so we can upload them along with our diff.
-    if self.options.revision:
-      extra_args = [self.options.revision] + extra_args
-    gitdiff = RunShell(["git", "diff", "--full-index"] + extra_args)
-    svndiff = []
-    filecount = 0
-    filename = None
-    for line in gitdiff.splitlines():
-      match = re.match(r"diff --git a/(.*) b/.*$", line)
-      if match:
-        filecount += 1
-        filename = match.group(1)
-        svndiff.append("Index: %s\n" % filename)
-      else:
-        # The "index" line in a git diff looks like this (long hashes elided):
-        #   index 82c0d44..b2cee3f 100755
-        # We want to save the left hash, as that identifies the base file.
-        match = re.match(r"index (\w+)\.\.", line)
-        if match:
-          self.base_hashes[filename] = match.group(1)
-      svndiff.append(line + "\n")
-    if not filecount:
-      ErrorExit("No valid patches found in output from git diff")
-    return "".join(svndiff)
-
-  def GetUnknownFiles(self):
-    status = RunShell(["git", "ls-files", "--exclude-standard", "--others"],
-                      silent_ok=True)
-    return status.splitlines()
-
-  def GetBaseFile(self, filename):
-    hash = self.base_hashes[filename]
-    base_content = None
-    new_content = None
-    is_binary = False
-    if hash == "0" * 40:  # All-zero hash indicates no base file.
-      status = "A"
-      base_content = ""
-    else:
-      status = "M"
-      base_content, returncode = RunShellWithReturnCode(["git", "show", hash])
-      if returncode:
-        ErrorExit("Got error status from 'git show %s'" % hash)
-    return (base_content, new_content, is_binary, status)
-
-
-class MercurialVCS(VersionControlSystem):
-  """Implementation of the VersionControlSystem interface for Mercurial."""
-
-  def __init__(self, options, repo_dir):
-    super(MercurialVCS, self).__init__(options)
-    # Absolute path to repository (we can be in a subdir)
-    self.repo_dir = os.path.normpath(repo_dir)
-    # Compute the subdir
-    cwd = os.path.normpath(os.getcwd())
-    assert cwd.startswith(self.repo_dir)
-    self.subdir = cwd[len(self.repo_dir):].lstrip(r"\/")
-    if self.options.revision:
-      self.base_rev = self.options.revision
-    else:
-      self.base_rev = RunShell(["hg", "parent", "-q"]).split(':')[1].strip()
-
-  def _GetRelPath(self, filename):
-    """Get relative path of a file according to the current directory,
-    given its logical path in the repo."""
-    assert filename.startswith(self.subdir), filename
-    return filename[len(self.subdir):].lstrip(r"\/")
-
-  def GenerateDiff(self, extra_args):
-    # If no file specified, restrict to the current subdir
-    extra_args = extra_args or ["."]
-    cmd = ["hg", "diff", "--git", "-r", self.base_rev] + extra_args
-    data = RunShell(cmd, silent_ok=True)
-    svndiff = []
-    filecount = 0
-    for line in data.splitlines():
-      m = re.match("diff --git a/(\S+) b/(\S+)", line)
-      if m:
-        # Modify line to make it look like as it comes from svn diff.
-        # With this modification no changes on the server side are required
-        # to make upload.py work with Mercurial repos.
-        # NOTE: for proper handling of moved/copied files, we have to use
-        # the second filename.
-        filename = m.group(2)
-        svndiff.append("Index: %s" % filename)
-        svndiff.append("=" * 67)
-        filecount += 1
-        logging.info(line)
-      else:
-        svndiff.append(line)
-    if not filecount:
-      ErrorExit("No valid patches found in output from hg diff")
-    return "\n".join(svndiff) + "\n"
-
-  def GetUnknownFiles(self):
-    """Return a list of files unknown to the VCS."""
-    args = []
-    status = RunShell(["hg", "status", "--rev", self.base_rev, "-u", "."],
-        silent_ok=True)
-    unknown_files = []
-    for line in status.splitlines():
-      st, fn = line.split(" ", 1)
-      if st == "?":
-        unknown_files.append(fn)
-    return unknown_files
-
-  def GetBaseFile(self, filename):
-    # "hg status" and "hg cat" both take a path relative to the current subdir
-    # rather than to the repo root, but "hg diff" has given us the full path
-    # to the repo root.
-    base_content = ""
-    new_content = None
-    is_binary = False
-    oldrelpath = relpath = self._GetRelPath(filename)
-    # "hg status -C" returns two lines for moved/copied files, one otherwise
-    out = RunShell(["hg", "status", "-C", "--rev", self.base_rev, relpath])
-    out = out.splitlines()
-    # HACK: strip error message about missing file/directory if it isn't in
-    # the working copy
-    if out[0].startswith('%s: ' % relpath):
-      out = out[1:]
-    if len(out) > 1:
-      # Moved/copied => considered as modified, use old filename to
-      # retrieve base contents
-      oldrelpath = out[1].strip()
-      status = "M"
-    else:
-      status, _ = out[0].split(' ', 1)
-    if status != "A":
-      base_content = RunShell(["hg", "cat", "-r", self.base_rev, oldrelpath],
-        silent_ok=True)
-      is_binary = "\0" in base_content  # Mercurial's heuristic
-    if status != "R":
-      new_content = open(relpath, "rb").read()
-      is_binary = is_binary or "\0" in new_content
-    if is_binary and base_content:
-      # Fetch again without converting newlines
-      base_content = RunShell(["hg", "cat", "-r", self.base_rev, oldrelpath],
-        silent_ok=True, universal_newlines=False)
-    if not is_binary or not self.IsImage(relpath):
-      new_content = None
-    return base_content, new_content, is_binary, status
-
-
-# NOTE: The SplitPatch function is duplicated in engine.py, keep them in sync.
-def SplitPatch(data):
-  """Splits a patch into separate pieces for each file.
-
-  Args:
-    data: A string containing the output of svn diff.
-
-  Returns:
-    A list of 2-tuple (filename, text) where text is the svn diff output
-      pertaining to filename.
-  """
-  patches = []
-  filename = None
-  diff = []
-  for line in data.splitlines(True):
-    new_filename = None
-    if line.startswith('Index:'):
-      unused, new_filename = line.split(':', 1)
-      new_filename = new_filename.strip()
-    elif line.startswith('Property changes on:'):
-      unused, temp_filename = line.split(':', 1)
-      # When a file is modified, paths use '/' between directories, however
-      # when a property is modified '\' is used on Windows.  Make them the same
-      # otherwise the file shows up twice.
-      temp_filename = temp_filename.strip().replace('\\', '/')
-      if temp_filename != filename:
-        # File has property changes but no modifications, create a new diff.
-        new_filename = temp_filename
-    if new_filename:
-      if filename and diff:
-        patches.append((filename, ''.join(diff)))
-      filename = new_filename
-      diff = [line]
-      continue
-    if diff is not None:
-      diff.append(line)
-  if filename and diff:
-    patches.append((filename, ''.join(diff)))
-  return patches
-
-
-def UploadSeparatePatches(issue, rpc_server, patchset, data, options):
-  """Uploads a separate patch for each file in the diff output.
-
-  Returns a list of [patch_key, filename] for each file.
-  """
-  patches = SplitPatch(data)
-  rv = []
-  for patch in patches:
-    if len(patch[1]) > MAX_UPLOAD_SIZE:
-      print ("Not uploading the patch for " + patch[0] +
-             " because the file is too large.")
-      continue
-    form_fields = [("filename", patch[0])]
-    if not options.download_base:
-      form_fields.append(("content_upload", "1"))
-    files = [("data", "data.diff", patch[1])]
-    ctype, body = EncodeMultipartFormData(form_fields, files)
-    url = "/%d/upload_patch/%d" % (int(issue), int(patchset))
-    print "Uploading patch for " + patch[0]
-    response_body = rpc_server.Send(url, body, content_type=ctype)
-    lines = response_body.splitlines()
-    if not lines or lines[0] != "OK":
-      StatusUpdate("  --> %s" % response_body)
-      sys.exit(1)
-    rv.append([lines[1], patch[0]])
-  return rv
-
-
-def GuessVCS(options):
-  """Helper to guess the version control system.
-
-  This examines the current directory, guesses which VersionControlSystem
-  we're using, and returns an instance of the appropriate class.  Exit with an
-  error if we can't figure it out.
-
-  Returns:
-    A VersionControlSystem instance. Exits if the VCS can't be guessed.
-  """
-  # Mercurial has a command to get the base directory of a repository
-  # Try running it, but don't die if we don't have hg installed.
-  # NOTE: we try Mercurial first as it can sit on top of an SVN working copy.
-  try:
-    out, returncode = RunShellWithReturnCode(["hg", "root"])
-    if returncode == 0:
-      return MercurialVCS(options, out.strip())
-  except OSError, (errno, message):
-    if errno != 2:  # ENOENT -- they don't have hg installed.
-      raise
-
-  # Subversion has a .svn in all working directories.
-  if os.path.isdir('.svn'):
-    logging.info("Guessed VCS = Subversion")
-    return SubversionVCS(options)
-
-  # Git has a command to test if you're in a git tree.
-  # Try running it, but don't die if we don't have git installed.
-  try:
-    out, returncode = RunShellWithReturnCode(["git", "rev-parse",
-                                              "--is-inside-work-tree"])
-    if returncode == 0:
-      return GitVCS(options)
-  except OSError, (errno, message):
-    if errno != 2:  # ENOENT -- they don't have git installed.
-      raise
-
-  ErrorExit(("Could not guess version control system. "
-             "Are you in a working copy directory?"))
-
-
-def RealMain(argv, data=None):
-  """The real main function.
-
-  Args:
-    argv: Command line arguments.
-    data: Diff contents. If None (default) the diff is generated by
-      the VersionControlSystem implementation returned by GuessVCS().
-
-  Returns:
-    A 2-tuple (issue id, patchset id).
-    The patchset id is None if the base files are not uploaded by this
-    script (applies only to SVN checkouts).
-  """
-  logging.basicConfig(format=("%(asctime).19s %(levelname)s %(filename)s:"
-                              "%(lineno)s %(message)s "))
-  os.environ['LC_ALL'] = 'C'
-  options, args = parser.parse_args(argv[1:])
-  global verbosity
-  verbosity = options.verbose
-  if verbosity >= 3:
-    logging.getLogger().setLevel(logging.DEBUG)
-  elif verbosity >= 2:
-    logging.getLogger().setLevel(logging.INFO)
-  vcs = GuessVCS(options)
-  if isinstance(vcs, SubversionVCS):
-    # base field is only allowed for Subversion.
-    # Note: Fetching base files may become deprecated in future releases.
-    base = vcs.GuessBase(options.download_base)
-  else:
-    base = None
-  if not base and options.download_base:
-    options.download_base = True
-    logging.info("Enabled upload of base file")
-  if not options.assume_yes:
-    vcs.CheckForUnknownFiles()
-  if data is None:
-    data = vcs.GenerateDiff(args)
-  files = vcs.GetBaseFiles(data)
-  if verbosity >= 1:
-    print "Upload server:", options.server, "(change with -s/--server)"
-  if options.issue:
-    prompt = "Message describing this patch set: "
-  else:
-    prompt = "New issue subject: "
-  message = options.message or raw_input(prompt).strip()
-  if not message:
-    ErrorExit("A non-empty message is required")
-  rpc_server = GetRpcServer(options)
-  form_fields = [("subject", message)]
-  if base:
-    form_fields.append(("base", base))
-  if options.issue:
-    form_fields.append(("issue", str(options.issue)))
-  if options.email:
-    form_fields.append(("user", options.email))
-  if options.reviewers:
-    for reviewer in options.reviewers.split(','):
-      if "@" in reviewer and not reviewer.split("@")[1].count(".") == 1:
-        ErrorExit("Invalid email address: %s" % reviewer)
-    form_fields.append(("reviewers", options.reviewers))
-  if options.cc:
-    for cc in options.cc.split(','):
-      if "@" in cc and not cc.split("@")[1].count(".") == 1:
-        ErrorExit("Invalid email address: %s" % cc)
-    form_fields.append(("cc", options.cc))
-  description = options.description
-  if options.description_file:
-    if options.description:
-      ErrorExit("Can't specify description and description_file")
-    file = open(options.description_file, 'r')
-    description = file.read()
-    file.close()
-  if description:
-    form_fields.append(("description", description))
-  # Send a hash of all the base file so the server can determine if a copy
-  # already exists in an earlier patchset.
-  base_hashes = ""
-  for file, info in files.iteritems():
-    if not info[0] is None:
-      checksum = md5.new(info[0]).hexdigest()
-      if base_hashes:
-        base_hashes += "|"
-      base_hashes += checksum + ":" + file
-  form_fields.append(("base_hashes", base_hashes))
-  # If we're uploading base files, don't send the email before the uploads, so
-  # that it contains the file status.
-  if options.send_mail and options.download_base:
-    form_fields.append(("send_mail", "1"))
-  if not options.download_base:
-    form_fields.append(("content_upload", "1"))
-  if len(data) > MAX_UPLOAD_SIZE:
-    print "Patch is large, so uploading file patches separately."
-    uploaded_diff_file = []
-    form_fields.append(("separate_patches", "1"))
-  else:
-    uploaded_diff_file = [("data", "data.diff", data)]
-  ctype, body = EncodeMultipartFormData(form_fields, uploaded_diff_file)
-  response_body = rpc_server.Send("/upload", body, content_type=ctype)
-  patchset = None
-  if not options.download_base or not uploaded_diff_file:
-    lines = response_body.splitlines()
-    if len(lines) >= 2:
-      msg = lines[0]
-      patchset = lines[1].strip()
-      patches = [x.split(" ", 1) for x in lines[2:]]
-    else:
-      msg = response_body
-  else:
-    msg = response_body
-  StatusUpdate(msg)
-  if not response_body.startswith("Issue created.") and \
-  not response_body.startswith("Issue updated."):
-    sys.exit(0)
-  issue = msg[msg.rfind("/")+1:]
-
-  if not uploaded_diff_file:
-    result = UploadSeparatePatches(issue, rpc_server, patchset, data, options)
-    if not options.download_base:
-      patches = result
-
-  if not options.download_base:
-    vcs.UploadBaseFiles(issue, rpc_server, patches, patchset, options, files)
-    if options.send_mail:
-      rpc_server.Send("/" + issue + "/mail", payload="")
-  return issue, patchset
-
-
-def main():
-  try:
-    RealMain(sys.argv)
-  except KeyboardInterrupt:
-    print
-    StatusUpdate("Interrupted.")
-    sys.exit(1)
-
-
-if __name__ == "__main__":
-  main()
diff --git a/3rdparty/gtest/scripts/upload_gtest.py b/3rdparty/gtest/scripts/upload_gtest.py
deleted file mode 100644
index be19ae80..00000000
--- a/3rdparty/gtest/scripts/upload_gtest.py
+++ /dev/null
@@ -1,78 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""upload_gtest.py v0.1.0 -- uploads a Google Test patch for review.
-
-This simple wrapper passes all command line flags and
---cc=googletestframework@googlegroups.com to upload.py.
-
-USAGE: upload_gtest.py [options for upload.py]
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import sys
-
-CC_FLAG = '--cc='
-GTEST_GROUP = 'googletestframework@googlegroups.com'
-
-
-def main():
-  # Finds the path to upload.py, assuming it is in the same directory
-  # as this file.
-  my_dir = os.path.dirname(os.path.abspath(__file__))
-  upload_py_path = os.path.join(my_dir, 'upload.py')
-
-  # Adds Google Test discussion group to the cc line if it's not there
-  # already.
-  upload_py_argv = [upload_py_path]
-  found_cc_flag = False
-  for arg in sys.argv[1:]:
-    if arg.startswith(CC_FLAG):
-      found_cc_flag = True
-      cc_line = arg[len(CC_FLAG):]
-      cc_list = [addr for addr in cc_line.split(',') if addr]
-      if GTEST_GROUP not in cc_list:
-        cc_list.append(GTEST_GROUP)
-      upload_py_argv.append(CC_FLAG + ','.join(cc_list))
-    else:
-      upload_py_argv.append(arg)
-
-  if not found_cc_flag:
-    upload_py_argv.append(CC_FLAG + GTEST_GROUP)
-
-  # Invokes upload.py with the modified command line flags.
-  os.execv(upload_py_path, upload_py_argv)
-
-
-if __name__ == '__main__':
-  main()
diff --git a/3rdparty/gtest/src/gtest-all.cc b/3rdparty/gtest/src/gtest-all.cc
deleted file mode 100644
index ad292905..00000000
--- a/3rdparty/gtest/src/gtest-all.cc
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Google C++ Testing and Mocking Framework (Google Test)
-//
-// Sometimes it's desirable to build Google Test by compiling a single file.
-// This file serves this purpose.
-
-// This line ensures that gtest.h can be compiled on its own, even
-// when it's fused.
-#include "gtest/gtest.h"
-
-// The following lines pull in the real gtest *.cc files.
-#include "src/gtest.cc"
-#include "src/gtest-death-test.cc"
-#include "src/gtest-filepath.cc"
-#include "src/gtest-matchers.cc"
-#include "src/gtest-port.cc"
-#include "src/gtest-printers.cc"
-#include "src/gtest-test-part.cc"
-#include "src/gtest-typed-test.cc"
diff --git a/3rdparty/gtest/src/gtest-death-test.cc b/3rdparty/gtest/src/gtest-death-test.cc
deleted file mode 100644
index 7419ba2c..00000000
--- a/3rdparty/gtest/src/gtest-death-test.cc
+++ /dev/null
@@ -1,1653 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// This file implements death tests.
-
-#include "gtest/gtest-death-test.h"
-
-#include <utility>
-
-#include "gtest/internal/gtest-port.h"
-#include "gtest/internal/custom/gtest.h"
-
-#if GTEST_HAS_DEATH_TEST
-
-# if GTEST_OS_MAC
-#  include <crt_externs.h>
-# endif  // GTEST_OS_MAC
-
-# include <errno.h>
-# include <fcntl.h>
-# include <limits.h>
-
-# if GTEST_OS_LINUX
-#  include <signal.h>
-# endif  // GTEST_OS_LINUX
-
-# include <stdarg.h>
-
-# if GTEST_OS_WINDOWS
-#  include <windows.h>
-# else
-#  include <sys/mman.h>
-#  include <sys/wait.h>
-# endif  // GTEST_OS_WINDOWS
-
-# if GTEST_OS_QNX
-#  include <spawn.h>
-# endif  // GTEST_OS_QNX
-
-# if GTEST_OS_FUCHSIA
-#  include <lib/fdio/fd.h>
-#  include <lib/fdio/io.h>
-#  include <lib/fdio/spawn.h>
-#  include <lib/zx/channel.h>
-#  include <lib/zx/port.h>
-#  include <lib/zx/process.h>
-#  include <lib/zx/socket.h>
-#  include <zircon/processargs.h>
-#  include <zircon/syscalls.h>
-#  include <zircon/syscalls/policy.h>
-#  include <zircon/syscalls/port.h>
-# endif  // GTEST_OS_FUCHSIA
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-#include "gtest/gtest-message.h"
-#include "gtest/internal/gtest-string.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-
-// Constants.
-
-// The default death test style.
-//
-// This is defined in internal/gtest-port.h as "fast", but can be overridden by
-// a definition in internal/custom/gtest-port.h. The recommended value, which is
-// used internally at Google, is "threadsafe".
-static const char kDefaultDeathTestStyle[] = GTEST_DEFAULT_DEATH_TEST_STYLE;
-
-GTEST_DEFINE_string_(
-    death_test_style,
-    internal::StringFromGTestEnv("death_test_style", kDefaultDeathTestStyle),
-    "Indicates how to run a death test in a forked child process: "
-    "\"threadsafe\" (child process re-executes the test binary "
-    "from the beginning, running only the specific death test) or "
-    "\"fast\" (child process runs the death test immediately "
-    "after forking).");
-
-GTEST_DEFINE_bool_(
-    death_test_use_fork,
-    internal::BoolFromGTestEnv("death_test_use_fork", false),
-    "Instructs to use fork()/_exit() instead of clone() in death tests. "
-    "Ignored and always uses fork() on POSIX systems where clone() is not "
-    "implemented. Useful when running under valgrind or similar tools if "
-    "those do not support clone(). Valgrind 3.3.1 will just fail if "
-    "it sees an unsupported combination of clone() flags. "
-    "It is not recommended to use this flag w/o valgrind though it will "
-    "work in 99% of the cases. Once valgrind is fixed, this flag will "
-    "most likely be removed.");
-
-namespace internal {
-GTEST_DEFINE_string_(
-    internal_run_death_test, "",
-    "Indicates the file, line number, temporal index of "
-    "the single death test to run, and a file descriptor to "
-    "which a success code may be sent, all separated by "
-    "the '|' characters.  This flag is specified if and only if the "
-    "current process is a sub-process launched for running a thread-safe "
-    "death test.  FOR INTERNAL USE ONLY.");
-}  // namespace internal
-
-#if GTEST_HAS_DEATH_TEST
-
-namespace internal {
-
-// Valid only for fast death tests. Indicates the code is running in the
-// child process of a fast style death test.
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-static bool g_in_fast_death_test_child = false;
-# endif
-
-// Returns a Boolean value indicating whether the caller is currently
-// executing in the context of the death test child process.  Tools such as
-// Valgrind heap checkers may need this to modify their behavior in death
-// tests.  IMPORTANT: This is an internal utility.  Using it may break the
-// implementation of death tests.  User code MUST NOT use it.
-bool InDeathTestChild() {
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  // On Windows and Fuchsia, death tests are thread-safe regardless of the value
-  // of the death_test_style flag.
-  return !GTEST_FLAG(internal_run_death_test).empty();
-
-# else
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe")
-    return !GTEST_FLAG(internal_run_death_test).empty();
-  else
-    return g_in_fast_death_test_child;
-#endif
-}
-
-}  // namespace internal
-
-// ExitedWithCode constructor.
-ExitedWithCode::ExitedWithCode(int exit_code) : exit_code_(exit_code) {
-}
-
-// ExitedWithCode function-call operator.
-bool ExitedWithCode::operator()(int exit_status) const {
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  return exit_status == exit_code_;
-
-# else
-
-  return WIFEXITED(exit_status) && WEXITSTATUS(exit_status) == exit_code_;
-
-# endif  // GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-}
-
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-// KilledBySignal constructor.
-KilledBySignal::KilledBySignal(int signum) : signum_(signum) {
-}
-
-// KilledBySignal function-call operator.
-bool KilledBySignal::operator()(int exit_status) const {
-#  if defined(GTEST_KILLED_BY_SIGNAL_OVERRIDE_)
-  {
-    bool result;
-    if (GTEST_KILLED_BY_SIGNAL_OVERRIDE_(signum_, exit_status, &result)) {
-      return result;
-    }
-  }
-#  endif  // defined(GTEST_KILLED_BY_SIGNAL_OVERRIDE_)
-  return WIFSIGNALED(exit_status) && WTERMSIG(exit_status) == signum_;
-}
-# endif  // !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-
-namespace internal {
-
-// Utilities needed for death tests.
-
-// Generates a textual description of a given exit code, in the format
-// specified by wait(2).
-static std::string ExitSummary(int exit_code) {
-  Message m;
-
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  m << "Exited with exit status " << exit_code;
-
-# else
-
-  if (WIFEXITED(exit_code)) {
-    m << "Exited with exit status " << WEXITSTATUS(exit_code);
-  } else if (WIFSIGNALED(exit_code)) {
-    m << "Terminated by signal " << WTERMSIG(exit_code);
-  }
-#  ifdef WCOREDUMP
-  if (WCOREDUMP(exit_code)) {
-    m << " (core dumped)";
-  }
-#  endif
-# endif  // GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  return m.GetString();
-}
-
-// Returns true if exit_status describes a process that was terminated
-// by a signal, or exited normally with a nonzero exit code.
-bool ExitedUnsuccessfully(int exit_status) {
-  return !ExitedWithCode(0)(exit_status);
-}
-
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-// Generates a textual failure message when a death test finds more than
-// one thread running, or cannot determine the number of threads, prior
-// to executing the given statement.  It is the responsibility of the
-// caller not to pass a thread_count of 1.
-static std::string DeathTestThreadWarning(size_t thread_count) {
-  Message msg;
-  msg << "Death tests use fork(), which is unsafe particularly"
-      << " in a threaded context. For this test, " << GTEST_NAME_ << " ";
-  if (thread_count == 0) {
-    msg << "couldn't detect the number of threads.";
-  } else {
-    msg << "detected " << thread_count << " threads.";
-  }
-  msg << " See "
-         "https://github.com/google/googletest/blob/master/googletest/docs/"
-         "advanced.md#death-tests-and-threads"
-      << " for more explanation and suggested solutions, especially if"
-      << " this is the last message you see before your test times out.";
-  return msg.GetString();
-}
-# endif  // !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-
-// Flag characters for reporting a death test that did not die.
-static const char kDeathTestLived = 'L';
-static const char kDeathTestReturned = 'R';
-static const char kDeathTestThrew = 'T';
-static const char kDeathTestInternalError = 'I';
-
-#if GTEST_OS_FUCHSIA
-
-// File descriptor used for the pipe in the child process.
-static const int kFuchsiaReadPipeFd = 3;
-
-#endif
-
-// An enumeration describing all of the possible ways that a death test can
-// conclude.  DIED means that the process died while executing the test
-// code; LIVED means that process lived beyond the end of the test code;
-// RETURNED means that the test statement attempted to execute a return
-// statement, which is not allowed; THREW means that the test statement
-// returned control by throwing an exception.  IN_PROGRESS means the test
-// has not yet concluded.
-enum DeathTestOutcome { IN_PROGRESS, DIED, LIVED, RETURNED, THREW };
-
-// Routine for aborting the program which is safe to call from an
-// exec-style death test child process, in which case the error
-// message is propagated back to the parent process.  Otherwise, the
-// message is simply printed to stderr.  In either case, the program
-// then exits with status 1.
-static void DeathTestAbort(const std::string& message) {
-  // On a POSIX system, this function may be called from a threadsafe-style
-  // death test child process, which operates on a very small stack.  Use
-  // the heap for any additional non-minuscule memory requirements.
-  const InternalRunDeathTestFlag* const flag =
-      GetUnitTestImpl()->internal_run_death_test_flag();
-  if (flag != nullptr) {
-    FILE* parent = posix::FDOpen(flag->write_fd(), "w");
-    fputc(kDeathTestInternalError, parent);
-    fprintf(parent, "%s", message.c_str());
-    fflush(parent);
-    _exit(1);
-  } else {
-    fprintf(stderr, "%s", message.c_str());
-    fflush(stderr);
-    posix::Abort();
-  }
-}
-
-// A replacement for CHECK that calls DeathTestAbort if the assertion
-// fails.
-# define GTEST_DEATH_TEST_CHECK_(expression) \
-  do { \
-    if (!::testing::internal::IsTrue(expression)) { \
-      DeathTestAbort( \
-          ::std::string("CHECK failed: File ") + __FILE__ +  ", line " \
-          + ::testing::internal::StreamableToString(__LINE__) + ": " \
-          + #expression); \
-    } \
-  } while (::testing::internal::AlwaysFalse())
-
-// This macro is similar to GTEST_DEATH_TEST_CHECK_, but it is meant for
-// evaluating any system call that fulfills two conditions: it must return
-// -1 on failure, and set errno to EINTR when it is interrupted and
-// should be tried again.  The macro expands to a loop that repeatedly
-// evaluates the expression as long as it evaluates to -1 and sets
-// errno to EINTR.  If the expression evaluates to -1 but errno is
-// something other than EINTR, DeathTestAbort is called.
-# define GTEST_DEATH_TEST_CHECK_SYSCALL_(expression) \
-  do { \
-    int gtest_retval; \
-    do { \
-      gtest_retval = (expression); \
-    } while (gtest_retval == -1 && errno == EINTR); \
-    if (gtest_retval == -1) { \
-      DeathTestAbort( \
-          ::std::string("CHECK failed: File ") + __FILE__ + ", line " \
-          + ::testing::internal::StreamableToString(__LINE__) + ": " \
-          + #expression + " != -1"); \
-    } \
-  } while (::testing::internal::AlwaysFalse())
-
-// Returns the message describing the last system error in errno.
-std::string GetLastErrnoDescription() {
-    return errno == 0 ? "" : posix::StrError(errno);
-}
-
-// This is called from a death test parent process to read a failure
-// message from the death test child process and log it with the FATAL
-// severity. On Windows, the message is read from a pipe handle. On other
-// platforms, it is read from a file descriptor.
-static void FailFromInternalError(int fd) {
-  Message error;
-  char buffer[256];
-  int num_read;
-
-  do {
-    while ((num_read = posix::Read(fd, buffer, 255)) > 0) {
-      buffer[num_read] = '\0';
-      error << buffer;
-    }
-  } while (num_read == -1 && errno == EINTR);
-
-  if (num_read == 0) {
-    GTEST_LOG_(FATAL) << error.GetString();
-  } else {
-    const int last_error = errno;
-    GTEST_LOG_(FATAL) << "Error while reading death test internal: "
-                      << GetLastErrnoDescription() << " [" << last_error << "]";
-  }
-}
-
-// Death test constructor.  Increments the running death test count
-// for the current test.
-DeathTest::DeathTest() {
-  TestInfo* const info = GetUnitTestImpl()->current_test_info();
-  if (info == nullptr) {
-    DeathTestAbort("Cannot run a death test outside of a TEST or "
-                   "TEST_F construct");
-  }
-}
-
-// Creates and returns a death test by dispatching to the current
-// death test factory.
-bool DeathTest::Create(const char* statement,
-                       Matcher<const std::string&> matcher, const char* file,
-                       int line, DeathTest** test) {
-  return GetUnitTestImpl()->death_test_factory()->Create(
-      statement, std::move(matcher), file, line, test);
-}
-
-const char* DeathTest::LastMessage() {
-  return last_death_test_message_.c_str();
-}
-
-void DeathTest::set_last_death_test_message(const std::string& message) {
-  last_death_test_message_ = message;
-}
-
-std::string DeathTest::last_death_test_message_;
-
-// Provides cross platform implementation for some death functionality.
-class DeathTestImpl : public DeathTest {
- protected:
-  DeathTestImpl(const char* a_statement, Matcher<const std::string&> matcher)
-      : statement_(a_statement),
-        matcher_(std::move(matcher)),
-        spawned_(false),
-        status_(-1),
-        outcome_(IN_PROGRESS),
-        read_fd_(-1),
-        write_fd_(-1) {}
-
-  // read_fd_ is expected to be closed and cleared by a derived class.
-  ~DeathTestImpl() override { GTEST_DEATH_TEST_CHECK_(read_fd_ == -1); }
-
-  void Abort(AbortReason reason) override;
-  bool Passed(bool status_ok) override;
-
-  const char* statement() const { return statement_; }
-  bool spawned() const { return spawned_; }
-  void set_spawned(bool is_spawned) { spawned_ = is_spawned; }
-  int status() const { return status_; }
-  void set_status(int a_status) { status_ = a_status; }
-  DeathTestOutcome outcome() const { return outcome_; }
-  void set_outcome(DeathTestOutcome an_outcome) { outcome_ = an_outcome; }
-  int read_fd() const { return read_fd_; }
-  void set_read_fd(int fd) { read_fd_ = fd; }
-  int write_fd() const { return write_fd_; }
-  void set_write_fd(int fd) { write_fd_ = fd; }
-
-  // Called in the parent process only. Reads the result code of the death
-  // test child process via a pipe, interprets it to set the outcome_
-  // member, and closes read_fd_.  Outputs diagnostics and terminates in
-  // case of unexpected codes.
-  void ReadAndInterpretStatusByte();
-
-  // Returns stderr output from the child process.
-  virtual std::string GetErrorLogs();
-
- private:
-  // The textual content of the code this object is testing.  This class
-  // doesn't own this string and should not attempt to delete it.
-  const char* const statement_;
-  // A matcher that's expected to match the stderr output by the child process.
-  Matcher<const std::string&> matcher_;
-  // True if the death test child process has been successfully spawned.
-  bool spawned_;
-  // The exit status of the child process.
-  int status_;
-  // How the death test concluded.
-  DeathTestOutcome outcome_;
-  // Descriptor to the read end of the pipe to the child process.  It is
-  // always -1 in the child process.  The child keeps its write end of the
-  // pipe in write_fd_.
-  int read_fd_;
-  // Descriptor to the child's write end of the pipe to the parent process.
-  // It is always -1 in the parent process.  The parent keeps its end of the
-  // pipe in read_fd_.
-  int write_fd_;
-};
-
-// Called in the parent process only. Reads the result code of the death
-// test child process via a pipe, interprets it to set the outcome_
-// member, and closes read_fd_.  Outputs diagnostics and terminates in
-// case of unexpected codes.
-void DeathTestImpl::ReadAndInterpretStatusByte() {
-  char flag;
-  int bytes_read;
-
-  // The read() here blocks until data is available (signifying the
-  // failure of the death test) or until the pipe is closed (signifying
-  // its success), so it's okay to call this in the parent before
-  // the child process has exited.
-  do {
-    bytes_read = posix::Read(read_fd(), &flag, 1);
-  } while (bytes_read == -1 && errno == EINTR);
-
-  if (bytes_read == 0) {
-    set_outcome(DIED);
-  } else if (bytes_read == 1) {
-    switch (flag) {
-      case kDeathTestReturned:
-        set_outcome(RETURNED);
-        break;
-      case kDeathTestThrew:
-        set_outcome(THREW);
-        break;
-      case kDeathTestLived:
-        set_outcome(LIVED);
-        break;
-      case kDeathTestInternalError:
-        FailFromInternalError(read_fd());  // Does not return.
-        break;
-      default:
-        GTEST_LOG_(FATAL) << "Death test child process reported "
-                          << "unexpected status byte ("
-                          << static_cast<unsigned int>(flag) << ")";
-    }
-  } else {
-    GTEST_LOG_(FATAL) << "Read from death test child process failed: "
-                      << GetLastErrnoDescription();
-  }
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Close(read_fd()));
-  set_read_fd(-1);
-}
-
-std::string DeathTestImpl::GetErrorLogs() {
-  return GetCapturedStderr();
-}
-
-// Signals that the death test code which should have exited, didn't.
-// Should be called only in a death test child process.
-// Writes a status byte to the child's status file descriptor, then
-// calls _exit(1).
-void DeathTestImpl::Abort(AbortReason reason) {
-  // The parent process considers the death test to be a failure if
-  // it finds any data in our pipe.  So, here we write a single flag byte
-  // to the pipe, then exit.
-  const char status_ch =
-      reason == TEST_DID_NOT_DIE ? kDeathTestLived :
-      reason == TEST_THREW_EXCEPTION ? kDeathTestThrew : kDeathTestReturned;
-
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Write(write_fd(), &status_ch, 1));
-  // We are leaking the descriptor here because on some platforms (i.e.,
-  // when built as Windows DLL), destructors of global objects will still
-  // run after calling _exit(). On such systems, write_fd_ will be
-  // indirectly closed from the destructor of UnitTestImpl, causing double
-  // close if it is also closed here. On debug configurations, double close
-  // may assert. As there are no in-process buffers to flush here, we are
-  // relying on the OS to close the descriptor after the process terminates
-  // when the destructors are not run.
-  _exit(1);  // Exits w/o any normal exit hooks (we were supposed to crash)
-}
-
-// Returns an indented copy of stderr output for a death test.
-// This makes distinguishing death test output lines from regular log lines
-// much easier.
-static ::std::string FormatDeathTestOutput(const ::std::string& output) {
-  ::std::string ret;
-  for (size_t at = 0; ; ) {
-    const size_t line_end = output.find('\n', at);
-    ret += "[  DEATH   ] ";
-    if (line_end == ::std::string::npos) {
-      ret += output.substr(at);
-      break;
-    }
-    ret += output.substr(at, line_end + 1 - at);
-    at = line_end + 1;
-  }
-  return ret;
-}
-
-// Assesses the success or failure of a death test, using both private
-// members which have previously been set, and one argument:
-//
-// Private data members:
-//   outcome:  An enumeration describing how the death test
-//             concluded: DIED, LIVED, THREW, or RETURNED.  The death test
-//             fails in the latter three cases.
-//   status:   The exit status of the child process. On *nix, it is in the
-//             in the format specified by wait(2). On Windows, this is the
-//             value supplied to the ExitProcess() API or a numeric code
-//             of the exception that terminated the program.
-//   matcher_: A matcher that's expected to match the stderr output by the child
-//             process.
-//
-// Argument:
-//   status_ok: true if exit_status is acceptable in the context of
-//              this particular death test, which fails if it is false
-//
-// Returns true if and only if all of the above conditions are met.  Otherwise,
-// the first failing condition, in the order given above, is the one that is
-// reported. Also sets the last death test message string.
-bool DeathTestImpl::Passed(bool status_ok) {
-  if (!spawned())
-    return false;
-
-  const std::string error_message = GetErrorLogs();
-
-  bool success = false;
-  Message buffer;
-
-  buffer << "Death test: " << statement() << "\n";
-  switch (outcome()) {
-    case LIVED:
-      buffer << "    Result: failed to die.\n"
-             << " Error msg:\n" << FormatDeathTestOutput(error_message);
-      break;
-    case THREW:
-      buffer << "    Result: threw an exception.\n"
-             << " Error msg:\n" << FormatDeathTestOutput(error_message);
-      break;
-    case RETURNED:
-      buffer << "    Result: illegal return in test statement.\n"
-             << " Error msg:\n" << FormatDeathTestOutput(error_message);
-      break;
-    case DIED:
-      if (status_ok) {
-        if (matcher_.Matches(error_message)) {
-          success = true;
-        } else {
-          std::ostringstream stream;
-          matcher_.DescribeTo(&stream);
-          buffer << "    Result: died but not with expected error.\n"
-                 << "  Expected: " << stream.str() << "\n"
-                 << "Actual msg:\n"
-                 << FormatDeathTestOutput(error_message);
-        }
-      } else {
-        buffer << "    Result: died but not with expected exit code:\n"
-               << "            " << ExitSummary(status()) << "\n"
-               << "Actual msg:\n" << FormatDeathTestOutput(error_message);
-      }
-      break;
-    case IN_PROGRESS:
-    default:
-      GTEST_LOG_(FATAL)
-          << "DeathTest::Passed somehow called before conclusion of test";
-  }
-
-  DeathTest::set_last_death_test_message(buffer.GetString());
-  return success;
-}
-
-# if GTEST_OS_WINDOWS
-// WindowsDeathTest implements death tests on Windows. Due to the
-// specifics of starting new processes on Windows, death tests there are
-// always threadsafe, and Google Test considers the
-// --gtest_death_test_style=fast setting to be equivalent to
-// --gtest_death_test_style=threadsafe there.
-//
-// A few implementation notes:  Like the Linux version, the Windows
-// implementation uses pipes for child-to-parent communication. But due to
-// the specifics of pipes on Windows, some extra steps are required:
-//
-// 1. The parent creates a communication pipe and stores handles to both
-//    ends of it.
-// 2. The parent starts the child and provides it with the information
-//    necessary to acquire the handle to the write end of the pipe.
-// 3. The child acquires the write end of the pipe and signals the parent
-//    using a Windows event.
-// 4. Now the parent can release the write end of the pipe on its side. If
-//    this is done before step 3, the object's reference count goes down to
-//    0 and it is destroyed, preventing the child from acquiring it. The
-//    parent now has to release it, or read operations on the read end of
-//    the pipe will not return when the child terminates.
-// 5. The parent reads child's output through the pipe (outcome code and
-//    any possible error messages) from the pipe, and its stderr and then
-//    determines whether to fail the test.
-//
-// Note: to distinguish Win32 API calls from the local method and function
-// calls, the former are explicitly resolved in the global namespace.
-//
-class WindowsDeathTest : public DeathTestImpl {
- public:
-  WindowsDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
-                   const char* file, int line)
-      : DeathTestImpl(a_statement, std::move(matcher)),
-        file_(file),
-        line_(line) {}
-
-  // All of these virtual functions are inherited from DeathTest.
-  virtual int Wait();
-  virtual TestRole AssumeRole();
-
- private:
-  // The name of the file in which the death test is located.
-  const char* const file_;
-  // The line number on which the death test is located.
-  const int line_;
-  // Handle to the write end of the pipe to the child process.
-  AutoHandle write_handle_;
-  // Child process handle.
-  AutoHandle child_handle_;
-  // Event the child process uses to signal the parent that it has
-  // acquired the handle to the write end of the pipe. After seeing this
-  // event the parent can release its own handles to make sure its
-  // ReadFile() calls return when the child terminates.
-  AutoHandle event_handle_;
-};
-
-// Waits for the child in a death test to exit, returning its exit
-// status, or 0 if no child process exists.  As a side effect, sets the
-// outcome data member.
-int WindowsDeathTest::Wait() {
-  if (!spawned())
-    return 0;
-
-  // Wait until the child either signals that it has acquired the write end
-  // of the pipe or it dies.
-  const HANDLE wait_handles[2] = { child_handle_.Get(), event_handle_.Get() };
-  switch (::WaitForMultipleObjects(2,
-                                   wait_handles,
-                                   FALSE,  // Waits for any of the handles.
-                                   INFINITE)) {
-    case WAIT_OBJECT_0:
-    case WAIT_OBJECT_0 + 1:
-      break;
-    default:
-      GTEST_DEATH_TEST_CHECK_(false);  // Should not get here.
-  }
-
-  // The child has acquired the write end of the pipe or exited.
-  // We release the handle on our side and continue.
-  write_handle_.Reset();
-  event_handle_.Reset();
-
-  ReadAndInterpretStatusByte();
-
-  // Waits for the child process to exit if it haven't already. This
-  // returns immediately if the child has already exited, regardless of
-  // whether previous calls to WaitForMultipleObjects synchronized on this
-  // handle or not.
-  GTEST_DEATH_TEST_CHECK_(
-      WAIT_OBJECT_0 == ::WaitForSingleObject(child_handle_.Get(),
-                                             INFINITE));
-  DWORD status_code;
-  GTEST_DEATH_TEST_CHECK_(
-      ::GetExitCodeProcess(child_handle_.Get(), &status_code) != FALSE);
-  child_handle_.Reset();
-  set_status(static_cast<int>(status_code));
-  return status();
-}
-
-// The AssumeRole process for a Windows death test.  It creates a child
-// process with the same executable as the current process to run the
-// death test.  The child process is given the --gtest_filter and
-// --gtest_internal_run_death_test flags such that it knows to run the
-// current death test only.
-DeathTest::TestRole WindowsDeathTest::AssumeRole() {
-  const UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const TestInfo* const info = impl->current_test_info();
-  const int death_test_index = info->result()->death_test_count();
-
-  if (flag != nullptr) {
-    // ParseInternalRunDeathTestFlag() has performed all the necessary
-    // processing.
-    set_write_fd(flag->write_fd());
-    return EXECUTE_TEST;
-  }
-
-  // WindowsDeathTest uses an anonymous pipe to communicate results of
-  // a death test.
-  SECURITY_ATTRIBUTES handles_are_inheritable = {sizeof(SECURITY_ATTRIBUTES),
-                                                 nullptr, TRUE};
-  HANDLE read_handle, write_handle;
-  GTEST_DEATH_TEST_CHECK_(
-      ::CreatePipe(&read_handle, &write_handle, &handles_are_inheritable,
-                   0)  // Default buffer size.
-      != FALSE);
-  set_read_fd(::_open_osfhandle(reinterpret_cast<intptr_t>(read_handle),
-                                O_RDONLY));
-  write_handle_.Reset(write_handle);
-  event_handle_.Reset(::CreateEvent(
-      &handles_are_inheritable,
-      TRUE,       // The event will automatically reset to non-signaled state.
-      FALSE,      // The initial state is non-signalled.
-      nullptr));  // The even is unnamed.
-  GTEST_DEATH_TEST_CHECK_(event_handle_.Get() != nullptr);
-  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
-                                  kFilterFlag + "=" + info->test_suite_name() +
-                                  "." + info->name();
-  const std::string internal_flag =
-      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag +
-      "=" + file_ + "|" + StreamableToString(line_) + "|" +
-      StreamableToString(death_test_index) + "|" +
-      StreamableToString(static_cast<unsigned int>(::GetCurrentProcessId())) +
-      // size_t has the same width as pointers on both 32-bit and 64-bit
-      // Windows platforms.
-      // See http://msdn.microsoft.com/en-us/library/tcxf1dw6.aspx.
-      "|" + StreamableToString(reinterpret_cast<size_t>(write_handle)) +
-      "|" + StreamableToString(reinterpret_cast<size_t>(event_handle_.Get()));
-
-  char executable_path[_MAX_PATH + 1];  // NOLINT
-  GTEST_DEATH_TEST_CHECK_(_MAX_PATH + 1 != ::GetModuleFileNameA(nullptr,
-                                                                executable_path,
-                                                                _MAX_PATH));
-
-  std::string command_line =
-      std::string(::GetCommandLineA()) + " " + filter_flag + " \"" +
-      internal_flag + "\"";
-
-  DeathTest::set_last_death_test_message("");
-
-  CaptureStderr();
-  // Flush the log buffers since the log streams are shared with the child.
-  FlushInfoLog();
-
-  // The child process will share the standard handles with the parent.
-  STARTUPINFOA startup_info;
-  memset(&startup_info, 0, sizeof(STARTUPINFO));
-  startup_info.dwFlags = STARTF_USESTDHANDLES;
-  startup_info.hStdInput = ::GetStdHandle(STD_INPUT_HANDLE);
-  startup_info.hStdOutput = ::GetStdHandle(STD_OUTPUT_HANDLE);
-  startup_info.hStdError = ::GetStdHandle(STD_ERROR_HANDLE);
-
-  PROCESS_INFORMATION process_info;
-  GTEST_DEATH_TEST_CHECK_(
-      ::CreateProcessA(
-          executable_path, const_cast<char*>(command_line.c_str()),
-          nullptr,  // Retuned process handle is not inheritable.
-          nullptr,  // Retuned thread handle is not inheritable.
-          TRUE,  // Child inherits all inheritable handles (for write_handle_).
-          0x0,   // Default creation flags.
-          nullptr,  // Inherit the parent's environment.
-          UnitTest::GetInstance()->original_working_dir(), &startup_info,
-          &process_info) != FALSE);
-  child_handle_.Reset(process_info.hProcess);
-  ::CloseHandle(process_info.hThread);
-  set_spawned(true);
-  return OVERSEE_TEST;
-}
-
-# elif GTEST_OS_FUCHSIA
-
-class FuchsiaDeathTest : public DeathTestImpl {
- public:
-  FuchsiaDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
-                   const char* file, int line)
-      : DeathTestImpl(a_statement, std::move(matcher)),
-        file_(file),
-        line_(line) {}
-
-  // All of these virtual functions are inherited from DeathTest.
-  int Wait() override;
-  TestRole AssumeRole() override;
-  std::string GetErrorLogs() override;
-
- private:
-  // The name of the file in which the death test is located.
-  const char* const file_;
-  // The line number on which the death test is located.
-  const int line_;
-  // The stderr data captured by the child process.
-  std::string captured_stderr_;
-
-  zx::process child_process_;
-  zx::channel exception_channel_;
-  zx::socket stderr_socket_;
-};
-
-// Utility class for accumulating command-line arguments.
-class Arguments {
- public:
-  Arguments() { args_.push_back(nullptr); }
-
-  ~Arguments() {
-    for (std::vector<char*>::iterator i = args_.begin(); i != args_.end();
-         ++i) {
-      free(*i);
-    }
-  }
-  void AddArgument(const char* argument) {
-    args_.insert(args_.end() - 1, posix::StrDup(argument));
-  }
-
-  template <typename Str>
-  void AddArguments(const ::std::vector<Str>& arguments) {
-    for (typename ::std::vector<Str>::const_iterator i = arguments.begin();
-         i != arguments.end();
-         ++i) {
-      args_.insert(args_.end() - 1, posix::StrDup(i->c_str()));
-    }
-  }
-  char* const* Argv() {
-    return &args_[0];
-  }
-
-  int size() {
-    return args_.size() - 1;
-  }
-
- private:
-  std::vector<char*> args_;
-};
-
-// Waits for the child in a death test to exit, returning its exit
-// status, or 0 if no child process exists.  As a side effect, sets the
-// outcome data member.
-int FuchsiaDeathTest::Wait() {
-  const int kProcessKey = 0;
-  const int kSocketKey = 1;
-  const int kExceptionKey = 2;
-
-  if (!spawned())
-    return 0;
-
-  // Create a port to wait for socket/task/exception events.
-  zx_status_t status_zx;
-  zx::port port;
-  status_zx = zx::port::create(0, &port);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  // Register to wait for the child process to terminate.
-  status_zx = child_process_.wait_async(
-      port, kProcessKey, ZX_PROCESS_TERMINATED, ZX_WAIT_ASYNC_ONCE);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  // Register to wait for the socket to be readable or closed.
-  status_zx = stderr_socket_.wait_async(
-      port, kSocketKey, ZX_SOCKET_READABLE | ZX_SOCKET_PEER_CLOSED,
-      ZX_WAIT_ASYNC_ONCE);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  // Register to wait for an exception.
-  status_zx = exception_channel_.wait_async(
-      port, kExceptionKey, ZX_CHANNEL_READABLE, ZX_WAIT_ASYNC_ONCE);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  bool process_terminated = false;
-  bool socket_closed = false;
-  do {
-    zx_port_packet_t packet = {};
-    status_zx = port.wait(zx::time::infinite(), &packet);
-    GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-    if (packet.key == kExceptionKey) {
-      // Process encountered an exception. Kill it directly rather than
-      // letting other handlers process the event. We will get a kProcessKey
-      // event when the process actually terminates.
-      status_zx = child_process_.kill();
-      GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-    } else if (packet.key == kProcessKey) {
-      // Process terminated.
-      GTEST_DEATH_TEST_CHECK_(ZX_PKT_IS_SIGNAL_ONE(packet.type));
-      GTEST_DEATH_TEST_CHECK_(packet.signal.observed & ZX_PROCESS_TERMINATED);
-      process_terminated = true;
-    } else if (packet.key == kSocketKey) {
-      GTEST_DEATH_TEST_CHECK_(ZX_PKT_IS_SIGNAL_ONE(packet.type));
-      if (packet.signal.observed & ZX_SOCKET_READABLE) {
-        // Read data from the socket.
-        constexpr size_t kBufferSize = 1024;
-        do {
-          size_t old_length = captured_stderr_.length();
-          size_t bytes_read = 0;
-          captured_stderr_.resize(old_length + kBufferSize);
-          status_zx = stderr_socket_.read(
-              0, &captured_stderr_.front() + old_length, kBufferSize,
-              &bytes_read);
-          captured_stderr_.resize(old_length + bytes_read);
-        } while (status_zx == ZX_OK);
-        if (status_zx == ZX_ERR_PEER_CLOSED) {
-          socket_closed = true;
-        } else {
-          GTEST_DEATH_TEST_CHECK_(status_zx == ZX_ERR_SHOULD_WAIT);
-          status_zx = stderr_socket_.wait_async(
-              port, kSocketKey, ZX_SOCKET_READABLE | ZX_SOCKET_PEER_CLOSED,
-              ZX_WAIT_ASYNC_ONCE);
-          GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-        }
-      } else {
-        GTEST_DEATH_TEST_CHECK_(packet.signal.observed & ZX_SOCKET_PEER_CLOSED);
-        socket_closed = true;
-      }
-    }
-  } while (!process_terminated && !socket_closed);
-
-  ReadAndInterpretStatusByte();
-
-  zx_info_process_t buffer;
-  status_zx = child_process_.get_info(
-      ZX_INFO_PROCESS, &buffer, sizeof(buffer), nullptr, nullptr);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  GTEST_DEATH_TEST_CHECK_(buffer.exited);
-  set_status(buffer.return_code);
-  return status();
-}
-
-// The AssumeRole process for a Fuchsia death test.  It creates a child
-// process with the same executable as the current process to run the
-// death test.  The child process is given the --gtest_filter and
-// --gtest_internal_run_death_test flags such that it knows to run the
-// current death test only.
-DeathTest::TestRole FuchsiaDeathTest::AssumeRole() {
-  const UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const TestInfo* const info = impl->current_test_info();
-  const int death_test_index = info->result()->death_test_count();
-
-  if (flag != nullptr) {
-    // ParseInternalRunDeathTestFlag() has performed all the necessary
-    // processing.
-    set_write_fd(kFuchsiaReadPipeFd);
-    return EXECUTE_TEST;
-  }
-
-  // Flush the log buffers since the log streams are shared with the child.
-  FlushInfoLog();
-
-  // Build the child process command line.
-  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
-                                  kFilterFlag + "=" + info->test_suite_name() +
-                                  "." + info->name();
-  const std::string internal_flag =
-      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag + "="
-      + file_ + "|"
-      + StreamableToString(line_) + "|"
-      + StreamableToString(death_test_index);
-  Arguments args;
-  args.AddArguments(GetInjectableArgvs());
-  args.AddArgument(filter_flag.c_str());
-  args.AddArgument(internal_flag.c_str());
-
-  // Build the pipe for communication with the child.
-  zx_status_t status;
-  zx_handle_t child_pipe_handle;
-  int child_pipe_fd;
-  status = fdio_pipe_half(&child_pipe_fd, &child_pipe_handle);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-  set_read_fd(child_pipe_fd);
-
-  // Set the pipe handle for the child.
-  fdio_spawn_action_t spawn_actions[2] = {};
-  fdio_spawn_action_t* add_handle_action = &spawn_actions[0];
-  add_handle_action->action = FDIO_SPAWN_ACTION_ADD_HANDLE;
-  add_handle_action->h.id = PA_HND(PA_FD, kFuchsiaReadPipeFd);
-  add_handle_action->h.handle = child_pipe_handle;
-
-  // Create a socket pair will be used to receive the child process' stderr.
-  zx::socket stderr_producer_socket;
-  status =
-      zx::socket::create(0, &stderr_producer_socket, &stderr_socket_);
-  GTEST_DEATH_TEST_CHECK_(status >= 0);
-  int stderr_producer_fd = -1;
-  status =
-      fdio_fd_create(stderr_producer_socket.release(), &stderr_producer_fd);
-  GTEST_DEATH_TEST_CHECK_(status >= 0);
-
-  // Make the stderr socket nonblocking.
-  GTEST_DEATH_TEST_CHECK_(fcntl(stderr_producer_fd, F_SETFL, 0) == 0);
-
-  fdio_spawn_action_t* add_stderr_action = &spawn_actions[1];
-  add_stderr_action->action = FDIO_SPAWN_ACTION_CLONE_FD;
-  add_stderr_action->fd.local_fd = stderr_producer_fd;
-  add_stderr_action->fd.target_fd = STDERR_FILENO;
-
-  // Create a child job.
-  zx_handle_t child_job = ZX_HANDLE_INVALID;
-  status = zx_job_create(zx_job_default(), 0, & child_job);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-  zx_policy_basic_t policy;
-  policy.condition = ZX_POL_NEW_ANY;
-  policy.policy = ZX_POL_ACTION_ALLOW;
-  status = zx_job_set_policy(
-      child_job, ZX_JOB_POL_RELATIVE, ZX_JOB_POL_BASIC, &policy, 1);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-
-  // Create an exception channel attached to the |child_job|, to allow
-  // us to suppress the system default exception handler from firing.
-  status =
-      zx_task_create_exception_channel(
-          child_job, 0, exception_channel_.reset_and_get_address());
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-
-  // Spawn the child process.
-  status = fdio_spawn_etc(
-      child_job, FDIO_SPAWN_CLONE_ALL, args.Argv()[0], args.Argv(), nullptr,
-      2, spawn_actions, child_process_.reset_and_get_address(), nullptr);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-
-  set_spawned(true);
-  return OVERSEE_TEST;
-}
-
-std::string FuchsiaDeathTest::GetErrorLogs() {
-  return captured_stderr_;
-}
-
-#else  // We are neither on Windows, nor on Fuchsia.
-
-// ForkingDeathTest provides implementations for most of the abstract
-// methods of the DeathTest interface.  Only the AssumeRole method is
-// left undefined.
-class ForkingDeathTest : public DeathTestImpl {
- public:
-  ForkingDeathTest(const char* statement, Matcher<const std::string&> matcher);
-
-  // All of these virtual functions are inherited from DeathTest.
-  int Wait() override;
-
- protected:
-  void set_child_pid(pid_t child_pid) { child_pid_ = child_pid; }
-
- private:
-  // PID of child process during death test; 0 in the child process itself.
-  pid_t child_pid_;
-};
-
-// Constructs a ForkingDeathTest.
-ForkingDeathTest::ForkingDeathTest(const char* a_statement,
-                                   Matcher<const std::string&> matcher)
-    : DeathTestImpl(a_statement, std::move(matcher)), child_pid_(-1) {}
-
-// Waits for the child in a death test to exit, returning its exit
-// status, or 0 if no child process exists.  As a side effect, sets the
-// outcome data member.
-int ForkingDeathTest::Wait() {
-  if (!spawned())
-    return 0;
-
-  ReadAndInterpretStatusByte();
-
-  int status_value;
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(waitpid(child_pid_, &status_value, 0));
-  set_status(status_value);
-  return status_value;
-}
-
-// A concrete death test class that forks, then immediately runs the test
-// in the child process.
-class NoExecDeathTest : public ForkingDeathTest {
- public:
-  NoExecDeathTest(const char* a_statement, Matcher<const std::string&> matcher)
-      : ForkingDeathTest(a_statement, std::move(matcher)) {}
-  TestRole AssumeRole() override;
-};
-
-// The AssumeRole process for a fork-and-run death test.  It implements a
-// straightforward fork, with a simple pipe to transmit the status byte.
-DeathTest::TestRole NoExecDeathTest::AssumeRole() {
-  const size_t thread_count = GetThreadCount();
-  if (thread_count != 1) {
-    GTEST_LOG_(WARNING) << DeathTestThreadWarning(thread_count);
-  }
-
-  int pipe_fd[2];
-  GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1);
-
-  DeathTest::set_last_death_test_message("");
-  CaptureStderr();
-  // When we fork the process below, the log file buffers are copied, but the
-  // file descriptors are shared.  We flush all log files here so that closing
-  // the file descriptors in the child process doesn't throw off the
-  // synchronization between descriptors and buffers in the parent process.
-  // This is as close to the fork as possible to avoid a race condition in case
-  // there are multiple threads running before the death test, and another
-  // thread writes to the log file.
-  FlushInfoLog();
-
-  const pid_t child_pid = fork();
-  GTEST_DEATH_TEST_CHECK_(child_pid != -1);
-  set_child_pid(child_pid);
-  if (child_pid == 0) {
-    GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[0]));
-    set_write_fd(pipe_fd[1]);
-    // Redirects all logging to stderr in the child process to prevent
-    // concurrent writes to the log files.  We capture stderr in the parent
-    // process and append the child process' output to a log.
-    LogToStderr();
-    // Event forwarding to the listeners of event listener API mush be shut
-    // down in death test subprocesses.
-    GetUnitTestImpl()->listeners()->SuppressEventForwarding();
-    g_in_fast_death_test_child = true;
-    return EXECUTE_TEST;
-  } else {
-    GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
-    set_read_fd(pipe_fd[0]);
-    set_spawned(true);
-    return OVERSEE_TEST;
-  }
-}
-
-// A concrete death test class that forks and re-executes the main
-// program from the beginning, with command-line flags set that cause
-// only this specific death test to be run.
-class ExecDeathTest : public ForkingDeathTest {
- public:
-  ExecDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
-                const char* file, int line)
-      : ForkingDeathTest(a_statement, std::move(matcher)),
-        file_(file),
-        line_(line) {}
-  TestRole AssumeRole() override;
-
- private:
-  static ::std::vector<std::string> GetArgvsForDeathTestChildProcess() {
-    ::std::vector<std::string> args = GetInjectableArgvs();
-#  if defined(GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_)
-    ::std::vector<std::string> extra_args =
-        GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_();
-    args.insert(args.end(), extra_args.begin(), extra_args.end());
-#  endif  // defined(GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_)
-    return args;
-  }
-  // The name of the file in which the death test is located.
-  const char* const file_;
-  // The line number on which the death test is located.
-  const int line_;
-};
-
-// Utility class for accumulating command-line arguments.
-class Arguments {
- public:
-  Arguments() { args_.push_back(nullptr); }
-
-  ~Arguments() {
-    for (std::vector<char*>::iterator i = args_.begin(); i != args_.end();
-         ++i) {
-      free(*i);
-    }
-  }
-  void AddArgument(const char* argument) {
-    args_.insert(args_.end() - 1, posix::StrDup(argument));
-  }
-
-  template <typename Str>
-  void AddArguments(const ::std::vector<Str>& arguments) {
-    for (typename ::std::vector<Str>::const_iterator i = arguments.begin();
-         i != arguments.end();
-         ++i) {
-      args_.insert(args_.end() - 1, posix::StrDup(i->c_str()));
-    }
-  }
-  char* const* Argv() {
-    return &args_[0];
-  }
-
- private:
-  std::vector<char*> args_;
-};
-
-// A struct that encompasses the arguments to the child process of a
-// threadsafe-style death test process.
-struct ExecDeathTestArgs {
-  char* const* argv;  // Command-line arguments for the child's call to exec
-  int close_fd;       // File descriptor to close; the read end of a pipe
-};
-
-#  if GTEST_OS_MAC
-inline char** GetEnviron() {
-  // When Google Test is built as a framework on MacOS X, the environ variable
-  // is unavailable. Apple's documentation (man environ) recommends using
-  // _NSGetEnviron() instead.
-  return *_NSGetEnviron();
-}
-#  else
-// Some POSIX platforms expect you to declare environ. extern "C" makes
-// it reside in the global namespace.
-extern "C" char** environ;
-inline char** GetEnviron() { return environ; }
-#  endif  // GTEST_OS_MAC
-
-#  if !GTEST_OS_QNX
-// The main function for a threadsafe-style death test child process.
-// This function is called in a clone()-ed process and thus must avoid
-// any potentially unsafe operations like malloc or libc functions.
-static int ExecDeathTestChildMain(void* child_arg) {
-  ExecDeathTestArgs* const args = static_cast<ExecDeathTestArgs*>(child_arg);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(args->close_fd));
-
-  // We need to execute the test program in the same environment where
-  // it was originally invoked.  Therefore we change to the original
-  // working directory first.
-  const char* const original_dir =
-      UnitTest::GetInstance()->original_working_dir();
-  // We can safely call chdir() as it's a direct system call.
-  if (chdir(original_dir) != 0) {
-    DeathTestAbort(std::string("chdir(\"") + original_dir + "\") failed: " +
-                   GetLastErrnoDescription());
-    return EXIT_FAILURE;
-  }
-
-  // We can safely call execve() as it's a direct system call.  We
-  // cannot use execvp() as it's a libc function and thus potentially
-  // unsafe.  Since execve() doesn't search the PATH, the user must
-  // invoke the test program via a valid path that contains at least
-  // one path separator.
-  execve(args->argv[0], args->argv, GetEnviron());
-  DeathTestAbort(std::string("execve(") + args->argv[0] + ", ...) in " +
-                 original_dir + " failed: " +
-                 GetLastErrnoDescription());
-  return EXIT_FAILURE;
-}
-#  endif  // !GTEST_OS_QNX
-
-#  if GTEST_HAS_CLONE
-// Two utility routines that together determine the direction the stack
-// grows.
-// This could be accomplished more elegantly by a single recursive
-// function, but we want to guard against the unlikely possibility of
-// a smart compiler optimizing the recursion away.
-//
-// GTEST_NO_INLINE_ is required to prevent GCC 4.6 from inlining
-// StackLowerThanAddress into StackGrowsDown, which then doesn't give
-// correct answer.
-static void StackLowerThanAddress(const void* ptr,
-                                  bool* result) GTEST_NO_INLINE_;
-// HWAddressSanitizer add a random tag to the MSB of the local variable address,
-// making comparison result unpredictable.
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-static void StackLowerThanAddress(const void* ptr, bool* result) {
-  int dummy;
-  *result = (&dummy < ptr);
-}
-
-// Make sure AddressSanitizer does not tamper with the stack here.
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-static bool StackGrowsDown() {
-  int dummy {};
-  bool result {};
-  StackLowerThanAddress(&dummy, &result);
-  return result;
-}
-#  endif  // GTEST_HAS_CLONE
-
-// Spawns a child process with the same executable as the current process in
-// a thread-safe manner and instructs it to run the death test.  The
-// implementation uses fork(2) + exec.  On systems where clone(2) is
-// available, it is used instead, being slightly more thread-safe.  On QNX,
-// fork supports only single-threaded environments, so this function uses
-// spawn(2) there instead.  The function dies with an error message if
-// anything goes wrong.
-static pid_t ExecDeathTestSpawnChild(char* const* argv, int close_fd) {
-  ExecDeathTestArgs args = { argv, close_fd };
-  pid_t child_pid = -1;
-
-#  if GTEST_OS_QNX
-  // Obtains the current directory and sets it to be closed in the child
-  // process.
-  const int cwd_fd = open(".", O_RDONLY);
-  GTEST_DEATH_TEST_CHECK_(cwd_fd != -1);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(fcntl(cwd_fd, F_SETFD, FD_CLOEXEC));
-  // We need to execute the test program in the same environment where
-  // it was originally invoked.  Therefore we change to the original
-  // working directory first.
-  const char* const original_dir =
-      UnitTest::GetInstance()->original_working_dir();
-  // We can safely call chdir() as it's a direct system call.
-  if (chdir(original_dir) != 0) {
-    DeathTestAbort(std::string("chdir(\"") + original_dir + "\") failed: " +
-                   GetLastErrnoDescription());
-    return EXIT_FAILURE;
-  }
-
-  int fd_flags;
-  // Set close_fd to be closed after spawn.
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(fd_flags = fcntl(close_fd, F_GETFD));
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(fcntl(close_fd, F_SETFD,
-                                        fd_flags | FD_CLOEXEC));
-  struct inheritance inherit = {0};
-  // spawn is a system call.
-  child_pid =
-      spawn(args.argv[0], 0, nullptr, &inherit, args.argv, GetEnviron());
-  // Restores the current working directory.
-  GTEST_DEATH_TEST_CHECK_(fchdir(cwd_fd) != -1);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(cwd_fd));
-
-#  else   // GTEST_OS_QNX
-#   if GTEST_OS_LINUX
-  // When a SIGPROF signal is received while fork() or clone() are executing,
-  // the process may hang. To avoid this, we ignore SIGPROF here and re-enable
-  // it after the call to fork()/clone() is complete.
-  struct sigaction saved_sigprof_action;
-  struct sigaction ignore_sigprof_action;
-  memset(&ignore_sigprof_action, 0, sizeof(ignore_sigprof_action));
-  sigemptyset(&ignore_sigprof_action.sa_mask);
-  ignore_sigprof_action.sa_handler = SIG_IGN;
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(sigaction(
-      SIGPROF, &ignore_sigprof_action, &saved_sigprof_action));
-#   endif  // GTEST_OS_LINUX
-
-#   if GTEST_HAS_CLONE
-  const bool use_fork = GTEST_FLAG(death_test_use_fork);
-
-  if (!use_fork) {
-    static const bool stack_grows_down = StackGrowsDown();
-    const auto stack_size = static_cast<size_t>(getpagesize());
-    // MMAP_ANONYMOUS is not defined on Mac, so we use MAP_ANON instead.
-    void* const stack = mmap(nullptr, stack_size, PROT_READ | PROT_WRITE,
-                             MAP_ANON | MAP_PRIVATE, -1, 0);
-    GTEST_DEATH_TEST_CHECK_(stack != MAP_FAILED);
-
-    // Maximum stack alignment in bytes:  For a downward-growing stack, this
-    // amount is subtracted from size of the stack space to get an address
-    // that is within the stack space and is aligned on all systems we care
-    // about.  As far as I know there is no ABI with stack alignment greater
-    // than 64.  We assume stack and stack_size already have alignment of
-    // kMaxStackAlignment.
-    const size_t kMaxStackAlignment = 64;
-    void* const stack_top =
-        static_cast<char*>(stack) +
-            (stack_grows_down ? stack_size - kMaxStackAlignment : 0);
-    GTEST_DEATH_TEST_CHECK_(
-        static_cast<size_t>(stack_size) > kMaxStackAlignment &&
-        reinterpret_cast<uintptr_t>(stack_top) % kMaxStackAlignment == 0);
-
-    child_pid = clone(&ExecDeathTestChildMain, stack_top, SIGCHLD, &args);
-
-    GTEST_DEATH_TEST_CHECK_(munmap(stack, stack_size) != -1);
-  }
-#   else
-  const bool use_fork = true;
-#   endif  // GTEST_HAS_CLONE
-
-  if (use_fork && (child_pid = fork()) == 0) {
-      ExecDeathTestChildMain(&args);
-      _exit(0);
-  }
-#  endif  // GTEST_OS_QNX
-#  if GTEST_OS_LINUX
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(
-      sigaction(SIGPROF, &saved_sigprof_action, nullptr));
-#  endif  // GTEST_OS_LINUX
-
-  GTEST_DEATH_TEST_CHECK_(child_pid != -1);
-  return child_pid;
-}
-
-// The AssumeRole process for a fork-and-exec death test.  It re-executes the
-// main program from the beginning, setting the --gtest_filter
-// and --gtest_internal_run_death_test flags to cause only the current
-// death test to be re-run.
-DeathTest::TestRole ExecDeathTest::AssumeRole() {
-  const UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const TestInfo* const info = impl->current_test_info();
-  const int death_test_index = info->result()->death_test_count();
-
-  if (flag != nullptr) {
-    set_write_fd(flag->write_fd());
-    return EXECUTE_TEST;
-  }
-
-  int pipe_fd[2];
-  GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1);
-  // Clear the close-on-exec flag on the write end of the pipe, lest
-  // it be closed when the child process does an exec:
-  GTEST_DEATH_TEST_CHECK_(fcntl(pipe_fd[1], F_SETFD, 0) != -1);
-
-  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
-                                  kFilterFlag + "=" + info->test_suite_name() +
-                                  "." + info->name();
-  const std::string internal_flag =
-      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag + "="
-      + file_ + "|" + StreamableToString(line_) + "|"
-      + StreamableToString(death_test_index) + "|"
-      + StreamableToString(pipe_fd[1]);
-  Arguments args;
-  args.AddArguments(GetArgvsForDeathTestChildProcess());
-  args.AddArgument(filter_flag.c_str());
-  args.AddArgument(internal_flag.c_str());
-
-  DeathTest::set_last_death_test_message("");
-
-  CaptureStderr();
-  // See the comment in NoExecDeathTest::AssumeRole for why the next line
-  // is necessary.
-  FlushInfoLog();
-
-  const pid_t child_pid = ExecDeathTestSpawnChild(args.Argv(), pipe_fd[0]);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
-  set_child_pid(child_pid);
-  set_read_fd(pipe_fd[0]);
-  set_spawned(true);
-  return OVERSEE_TEST;
-}
-
-# endif  // !GTEST_OS_WINDOWS
-
-// Creates a concrete DeathTest-derived class that depends on the
-// --gtest_death_test_style flag, and sets the pointer pointed to
-// by the "test" argument to its address.  If the test should be
-// skipped, sets that pointer to NULL.  Returns true, unless the
-// flag is set to an invalid value.
-bool DefaultDeathTestFactory::Create(const char* statement,
-                                     Matcher<const std::string&> matcher,
-                                     const char* file, int line,
-                                     DeathTest** test) {
-  UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const int death_test_index = impl->current_test_info()
-      ->increment_death_test_count();
-
-  if (flag != nullptr) {
-    if (death_test_index > flag->index()) {
-      DeathTest::set_last_death_test_message(
-          "Death test count (" + StreamableToString(death_test_index)
-          + ") somehow exceeded expected maximum ("
-          + StreamableToString(flag->index()) + ")");
-      return false;
-    }
-
-    if (!(flag->file() == file && flag->line() == line &&
-          flag->index() == death_test_index)) {
-      *test = nullptr;
-      return true;
-    }
-  }
-
-# if GTEST_OS_WINDOWS
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe" ||
-      GTEST_FLAG(death_test_style) == "fast") {
-    *test = new WindowsDeathTest(statement, std::move(matcher), file, line);
-  }
-
-# elif GTEST_OS_FUCHSIA
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe" ||
-      GTEST_FLAG(death_test_style) == "fast") {
-    *test = new FuchsiaDeathTest(statement, std::move(matcher), file, line);
-  }
-
-# else
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe") {
-    *test = new ExecDeathTest(statement, std::move(matcher), file, line);
-  } else if (GTEST_FLAG(death_test_style) == "fast") {
-    *test = new NoExecDeathTest(statement, std::move(matcher));
-  }
-
-# endif  // GTEST_OS_WINDOWS
-
-  else {  // NOLINT - this is more readable than unbalanced brackets inside #if.
-    DeathTest::set_last_death_test_message(
-        "Unknown death test style \"" + GTEST_FLAG(death_test_style)
-        + "\" encountered");
-    return false;
-  }
-
-  return true;
-}
-
-# if GTEST_OS_WINDOWS
-// Recreates the pipe and event handles from the provided parameters,
-// signals the event, and returns a file descriptor wrapped around the pipe
-// handle. This function is called in the child process only.
-static int GetStatusFileDescriptor(unsigned int parent_process_id,
-                            size_t write_handle_as_size_t,
-                            size_t event_handle_as_size_t) {
-  AutoHandle parent_process_handle(::OpenProcess(PROCESS_DUP_HANDLE,
-                                                   FALSE,  // Non-inheritable.
-                                                   parent_process_id));
-  if (parent_process_handle.Get() == INVALID_HANDLE_VALUE) {
-    DeathTestAbort("Unable to open parent process " +
-                   StreamableToString(parent_process_id));
-  }
-
-  GTEST_CHECK_(sizeof(HANDLE) <= sizeof(size_t));
-
-  const HANDLE write_handle =
-      reinterpret_cast<HANDLE>(write_handle_as_size_t);
-  HANDLE dup_write_handle;
-
-  // The newly initialized handle is accessible only in the parent
-  // process. To obtain one accessible within the child, we need to use
-  // DuplicateHandle.
-  if (!::DuplicateHandle(parent_process_handle.Get(), write_handle,
-                         ::GetCurrentProcess(), &dup_write_handle,
-                         0x0,    // Requested privileges ignored since
-                                 // DUPLICATE_SAME_ACCESS is used.
-                         FALSE,  // Request non-inheritable handler.
-                         DUPLICATE_SAME_ACCESS)) {
-    DeathTestAbort("Unable to duplicate the pipe handle " +
-                   StreamableToString(write_handle_as_size_t) +
-                   " from the parent process " +
-                   StreamableToString(parent_process_id));
-  }
-
-  const HANDLE event_handle = reinterpret_cast<HANDLE>(event_handle_as_size_t);
-  HANDLE dup_event_handle;
-
-  if (!::DuplicateHandle(parent_process_handle.Get(), event_handle,
-                         ::GetCurrentProcess(), &dup_event_handle,
-                         0x0,
-                         FALSE,
-                         DUPLICATE_SAME_ACCESS)) {
-    DeathTestAbort("Unable to duplicate the event handle " +
-                   StreamableToString(event_handle_as_size_t) +
-                   " from the parent process " +
-                   StreamableToString(parent_process_id));
-  }
-
-  const int write_fd =
-      ::_open_osfhandle(reinterpret_cast<intptr_t>(dup_write_handle), O_APPEND);
-  if (write_fd == -1) {
-    DeathTestAbort("Unable to convert pipe handle " +
-                   StreamableToString(write_handle_as_size_t) +
-                   " to a file descriptor");
-  }
-
-  // Signals the parent that the write end of the pipe has been acquired
-  // so the parent can release its own write end.
-  ::SetEvent(dup_event_handle);
-
-  return write_fd;
-}
-# endif  // GTEST_OS_WINDOWS
-
-// Returns a newly created InternalRunDeathTestFlag object with fields
-// initialized from the GTEST_FLAG(internal_run_death_test) flag if
-// the flag is specified; otherwise returns NULL.
-InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag() {
-  if (GTEST_FLAG(internal_run_death_test) == "") return nullptr;
-
-  // GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we
-  // can use it here.
-  int line = -1;
-  int index = -1;
-  ::std::vector< ::std::string> fields;
-  SplitString(GTEST_FLAG(internal_run_death_test).c_str(), '|', &fields);
-  int write_fd = -1;
-
-# if GTEST_OS_WINDOWS
-
-  unsigned int parent_process_id = 0;
-  size_t write_handle_as_size_t = 0;
-  size_t event_handle_as_size_t = 0;
-
-  if (fields.size() != 6
-      || !ParseNaturalNumber(fields[1], &line)
-      || !ParseNaturalNumber(fields[2], &index)
-      || !ParseNaturalNumber(fields[3], &parent_process_id)
-      || !ParseNaturalNumber(fields[4], &write_handle_as_size_t)
-      || !ParseNaturalNumber(fields[5], &event_handle_as_size_t)) {
-    DeathTestAbort("Bad --gtest_internal_run_death_test flag: " +
-                   GTEST_FLAG(internal_run_death_test));
-  }
-  write_fd = GetStatusFileDescriptor(parent_process_id,
-                                     write_handle_as_size_t,
-                                     event_handle_as_size_t);
-
-# elif GTEST_OS_FUCHSIA
-
-  if (fields.size() != 3
-      || !ParseNaturalNumber(fields[1], &line)
-      || !ParseNaturalNumber(fields[2], &index)) {
-    DeathTestAbort("Bad --gtest_internal_run_death_test flag: "
-        + GTEST_FLAG(internal_run_death_test));
-  }
-
-# else
-
-  if (fields.size() != 4
-      || !ParseNaturalNumber(fields[1], &line)
-      || !ParseNaturalNumber(fields[2], &index)
-      || !ParseNaturalNumber(fields[3], &write_fd)) {
-    DeathTestAbort("Bad --gtest_internal_run_death_test flag: "
-        + GTEST_FLAG(internal_run_death_test));
-  }
-
-# endif  // GTEST_OS_WINDOWS
-
-  return new InternalRunDeathTestFlag(fields[0], line, index, write_fd);
-}
-
-}  // namespace internal
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest-filepath.cc b/3rdparty/gtest/src/gtest-filepath.cc
deleted file mode 100644
index bd7b99ff..00000000
--- a/3rdparty/gtest/src/gtest-filepath.cc
+++ /dev/null
@@ -1,379 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include "gtest/internal/gtest-filepath.h"
-
-#include <stdlib.h>
-#include "gtest/internal/gtest-port.h"
-#include "gtest/gtest-message.h"
-
-#if GTEST_OS_WINDOWS_MOBILE
-# include <windows.h>
-#elif GTEST_OS_WINDOWS
-# include <direct.h>
-# include <io.h>
-#else
-# include <limits.h>
-# include <climits>  // Some Linux distributions define PATH_MAX here.
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-#include "gtest/internal/gtest-string.h"
-
-#if GTEST_OS_WINDOWS
-# define GTEST_PATH_MAX_ _MAX_PATH
-#elif defined(PATH_MAX)
-# define GTEST_PATH_MAX_ PATH_MAX
-#elif defined(_XOPEN_PATH_MAX)
-# define GTEST_PATH_MAX_ _XOPEN_PATH_MAX
-#else
-# define GTEST_PATH_MAX_ _POSIX_PATH_MAX
-#endif  // GTEST_OS_WINDOWS
-
-namespace testing {
-namespace internal {
-
-#if GTEST_OS_WINDOWS
-// On Windows, '\\' is the standard path separator, but many tools and the
-// Windows API also accept '/' as an alternate path separator. Unless otherwise
-// noted, a file path can contain either kind of path separators, or a mixture
-// of them.
-const char kPathSeparator = '\\';
-const char kAlternatePathSeparator = '/';
-const char kAlternatePathSeparatorString[] = "/";
-# if GTEST_OS_WINDOWS_MOBILE
-// Windows CE doesn't have a current directory. You should not use
-// the current directory in tests on Windows CE, but this at least
-// provides a reasonable fallback.
-const char kCurrentDirectoryString[] = "\\";
-// Windows CE doesn't define INVALID_FILE_ATTRIBUTES
-const DWORD kInvalidFileAttributes = 0xffffffff;
-# else
-const char kCurrentDirectoryString[] = ".\\";
-# endif  // GTEST_OS_WINDOWS_MOBILE
-#else
-const char kPathSeparator = '/';
-const char kCurrentDirectoryString[] = "./";
-#endif  // GTEST_OS_WINDOWS
-
-// Returns whether the given character is a valid path separator.
-static bool IsPathSeparator(char c) {
-#if GTEST_HAS_ALT_PATH_SEP_
-  return (c == kPathSeparator) || (c == kAlternatePathSeparator);
-#else
-  return c == kPathSeparator;
-#endif
-}
-
-// Returns the current working directory, or "" if unsuccessful.
-FilePath FilePath::GetCurrentDir() {
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE || \
-    GTEST_OS_WINDOWS_RT || ARDUINO || defined(ESP_PLATFORM)
-  // These platforms do not have a current directory, so we just return
-  // something reasonable.
-  return FilePath(kCurrentDirectoryString);
-#elif GTEST_OS_WINDOWS
-  char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
-  return FilePath(_getcwd(cwd, sizeof(cwd)) == nullptr ? "" : cwd);
-#else
-  char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
-  char* result = getcwd(cwd, sizeof(cwd));
-# if GTEST_OS_NACL
-  // getcwd will likely fail in NaCl due to the sandbox, so return something
-  // reasonable. The user may have provided a shim implementation for getcwd,
-  // however, so fallback only when failure is detected.
-  return FilePath(result == nullptr ? kCurrentDirectoryString : cwd);
-# endif  // GTEST_OS_NACL
-  return FilePath(result == nullptr ? "" : cwd);
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-// Returns a copy of the FilePath with the case-insensitive extension removed.
-// Example: FilePath("dir/file.exe").RemoveExtension("EXE") returns
-// FilePath("dir/file"). If a case-insensitive extension is not
-// found, returns a copy of the original FilePath.
-FilePath FilePath::RemoveExtension(const char* extension) const {
-  const std::string dot_extension = std::string(".") + extension;
-  if (String::EndsWithCaseInsensitive(pathname_, dot_extension)) {
-    return FilePath(pathname_.substr(
-        0, pathname_.length() - dot_extension.length()));
-  }
-  return *this;
-}
-
-// Returns a pointer to the last occurrence of a valid path separator in
-// the FilePath. On Windows, for example, both '/' and '\' are valid path
-// separators. Returns NULL if no path separator was found.
-const char* FilePath::FindLastPathSeparator() const {
-  const char* const last_sep = strrchr(c_str(), kPathSeparator);
-#if GTEST_HAS_ALT_PATH_SEP_
-  const char* const last_alt_sep = strrchr(c_str(), kAlternatePathSeparator);
-  // Comparing two pointers of which only one is NULL is undefined.
-  if (last_alt_sep != nullptr &&
-      (last_sep == nullptr || last_alt_sep > last_sep)) {
-    return last_alt_sep;
-  }
-#endif
-  return last_sep;
-}
-
-// Returns a copy of the FilePath with the directory part removed.
-// Example: FilePath("path/to/file").RemoveDirectoryName() returns
-// FilePath("file"). If there is no directory part ("just_a_file"), it returns
-// the FilePath unmodified. If there is no file part ("just_a_dir/") it
-// returns an empty FilePath ("").
-// On Windows platform, '\' is the path separator, otherwise it is '/'.
-FilePath FilePath::RemoveDirectoryName() const {
-  const char* const last_sep = FindLastPathSeparator();
-  return last_sep ? FilePath(last_sep + 1) : *this;
-}
-
-// RemoveFileName returns the directory path with the filename removed.
-// Example: FilePath("path/to/file").RemoveFileName() returns "path/to/".
-// If the FilePath is "a_file" or "/a_file", RemoveFileName returns
-// FilePath("./") or, on Windows, FilePath(".\\"). If the filepath does
-// not have a file, like "just/a/dir/", it returns the FilePath unmodified.
-// On Windows platform, '\' is the path separator, otherwise it is '/'.
-FilePath FilePath::RemoveFileName() const {
-  const char* const last_sep = FindLastPathSeparator();
-  std::string dir;
-  if (last_sep) {
-    dir = std::string(c_str(), static_cast<size_t>(last_sep + 1 - c_str()));
-  } else {
-    dir = kCurrentDirectoryString;
-  }
-  return FilePath(dir);
-}
-
-// Helper functions for naming files in a directory for xml output.
-
-// Given directory = "dir", base_name = "test", number = 0,
-// extension = "xml", returns "dir/test.xml". If number is greater
-// than zero (e.g., 12), returns "dir/test_12.xml".
-// On Windows platform, uses \ as the separator rather than /.
-FilePath FilePath::MakeFileName(const FilePath& directory,
-                                const FilePath& base_name,
-                                int number,
-                                const char* extension) {
-  std::string file;
-  if (number == 0) {
-    file = base_name.string() + "." + extension;
-  } else {
-    file = base_name.string() + "_" + StreamableToString(number)
-        + "." + extension;
-  }
-  return ConcatPaths(directory, FilePath(file));
-}
-
-// Given directory = "dir", relative_path = "test.xml", returns "dir/test.xml".
-// On Windows, uses \ as the separator rather than /.
-FilePath FilePath::ConcatPaths(const FilePath& directory,
-                               const FilePath& relative_path) {
-  if (directory.IsEmpty())
-    return relative_path;
-  const FilePath dir(directory.RemoveTrailingPathSeparator());
-  return FilePath(dir.string() + kPathSeparator + relative_path.string());
-}
-
-// Returns true if pathname describes something findable in the file-system,
-// either a file, directory, or whatever.
-bool FilePath::FileOrDirectoryExists() const {
-#if GTEST_OS_WINDOWS_MOBILE
-  LPCWSTR unicode = String::AnsiToUtf16(pathname_.c_str());
-  const DWORD attributes = GetFileAttributes(unicode);
-  delete [] unicode;
-  return attributes != kInvalidFileAttributes;
-#else
-  posix::StatStruct file_stat;
-  return posix::Stat(pathname_.c_str(), &file_stat) == 0;
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-// Returns true if pathname describes a directory in the file-system
-// that exists.
-bool FilePath::DirectoryExists() const {
-  bool result = false;
-#if GTEST_OS_WINDOWS
-  // Don't strip off trailing separator if path is a root directory on
-  // Windows (like "C:\\").
-  const FilePath& path(IsRootDirectory() ? *this :
-                                           RemoveTrailingPathSeparator());
-#else
-  const FilePath& path(*this);
-#endif
-
-#if GTEST_OS_WINDOWS_MOBILE
-  LPCWSTR unicode = String::AnsiToUtf16(path.c_str());
-  const DWORD attributes = GetFileAttributes(unicode);
-  delete [] unicode;
-  if ((attributes != kInvalidFileAttributes) &&
-      (attributes & FILE_ATTRIBUTE_DIRECTORY)) {
-    result = true;
-  }
-#else
-  posix::StatStruct file_stat;
-  result = posix::Stat(path.c_str(), &file_stat) == 0 &&
-      posix::IsDir(file_stat);
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-  return result;
-}
-
-// Returns true if pathname describes a root directory. (Windows has one
-// root directory per disk drive.)
-bool FilePath::IsRootDirectory() const {
-#if GTEST_OS_WINDOWS
-  return pathname_.length() == 3 && IsAbsolutePath();
-#else
-  return pathname_.length() == 1 && IsPathSeparator(pathname_.c_str()[0]);
-#endif
-}
-
-// Returns true if pathname describes an absolute path.
-bool FilePath::IsAbsolutePath() const {
-  const char* const name = pathname_.c_str();
-#if GTEST_OS_WINDOWS
-  return pathname_.length() >= 3 &&
-     ((name[0] >= 'a' && name[0] <= 'z') ||
-      (name[0] >= 'A' && name[0] <= 'Z')) &&
-     name[1] == ':' &&
-     IsPathSeparator(name[2]);
-#else
-  return IsPathSeparator(name[0]);
-#endif
-}
-
-// Returns a pathname for a file that does not currently exist. The pathname
-// will be directory/base_name.extension or
-// directory/base_name_<number>.extension if directory/base_name.extension
-// already exists. The number will be incremented until a pathname is found
-// that does not already exist.
-// Examples: 'dir/foo_test.xml' or 'dir/foo_test_1.xml'.
-// There could be a race condition if two or more processes are calling this
-// function at the same time -- they could both pick the same filename.
-FilePath FilePath::GenerateUniqueFileName(const FilePath& directory,
-                                          const FilePath& base_name,
-                                          const char* extension) {
-  FilePath full_pathname;
-  int number = 0;
-  do {
-    full_pathname.Set(MakeFileName(directory, base_name, number++, extension));
-  } while (full_pathname.FileOrDirectoryExists());
-  return full_pathname;
-}
-
-// Returns true if FilePath ends with a path separator, which indicates that
-// it is intended to represent a directory. Returns false otherwise.
-// This does NOT check that a directory (or file) actually exists.
-bool FilePath::IsDirectory() const {
-  return !pathname_.empty() &&
-         IsPathSeparator(pathname_.c_str()[pathname_.length() - 1]);
-}
-
-// Create directories so that path exists. Returns true if successful or if
-// the directories already exist; returns false if unable to create directories
-// for any reason.
-bool FilePath::CreateDirectoriesRecursively() const {
-  if (!this->IsDirectory()) {
-    return false;
-  }
-
-  if (pathname_.length() == 0 || this->DirectoryExists()) {
-    return true;
-  }
-
-  const FilePath parent(this->RemoveTrailingPathSeparator().RemoveFileName());
-  return parent.CreateDirectoriesRecursively() && this->CreateFolder();
-}
-
-// Create the directory so that path exists. Returns true if successful or
-// if the directory already exists; returns false if unable to create the
-// directory for any reason, including if the parent directory does not
-// exist. Not named "CreateDirectory" because that's a macro on Windows.
-bool FilePath::CreateFolder() const {
-#if GTEST_OS_WINDOWS_MOBILE
-  FilePath removed_sep(this->RemoveTrailingPathSeparator());
-  LPCWSTR unicode = String::AnsiToUtf16(removed_sep.c_str());
-  int result = CreateDirectory(unicode, nullptr) ? 0 : -1;
-  delete [] unicode;
-#elif GTEST_OS_WINDOWS
-  int result = _mkdir(pathname_.c_str());
-#else
-  int result = mkdir(pathname_.c_str(), 0777);
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-  if (result == -1) {
-    return this->DirectoryExists();  // An error is OK if the directory exists.
-  }
-  return true;  // No error.
-}
-
-// If input name has a trailing separator character, remove it and return the
-// name, otherwise return the name string unmodified.
-// On Windows platform, uses \ as the separator, other platforms use /.
-FilePath FilePath::RemoveTrailingPathSeparator() const {
-  return IsDirectory()
-      ? FilePath(pathname_.substr(0, pathname_.length() - 1))
-      : *this;
-}
-
-// Removes any redundant separators that might be in the pathname.
-// For example, "bar///foo" becomes "bar/foo". Does not eliminate other
-// redundancies that might be in a pathname involving "." or "..".
-void FilePath::Normalize() {
-  if (pathname_.c_str() == nullptr) {
-    pathname_ = "";
-    return;
-  }
-  const char* src = pathname_.c_str();
-  char* const dest = new char[pathname_.length() + 1];
-  char* dest_ptr = dest;
-  memset(dest_ptr, 0, pathname_.length() + 1);
-
-  while (*src != '\0') {
-    *dest_ptr = *src;
-    if (!IsPathSeparator(*src)) {
-      src++;
-    } else {
-#if GTEST_HAS_ALT_PATH_SEP_
-      if (*dest_ptr == kAlternatePathSeparator) {
-        *dest_ptr = kPathSeparator;
-      }
-#endif
-      while (IsPathSeparator(*src))
-        src++;
-    }
-    dest_ptr++;
-  }
-  *dest_ptr = '\0';
-  pathname_ = dest;
-  delete[] dest;
-}
-
-}  // namespace internal
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest-internal-inl.h b/3rdparty/gtest/src/gtest-internal-inl.h
deleted file mode 100644
index 8ed70daa..00000000
--- a/3rdparty/gtest/src/gtest-internal-inl.h
+++ /dev/null
@@ -1,1211 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Utility functions and classes used by the Google C++ testing framework.//
-// This file contains purely Google Test's internal implementation.  Please
-// DO NOT #INCLUDE IT IN A USER PROGRAM.
-
-#ifndef GTEST_SRC_GTEST_INTERNAL_INL_H_
-#define GTEST_SRC_GTEST_INTERNAL_INL_H_
-
-#ifndef _WIN32_WCE
-# include <errno.h>
-#endif  // !_WIN32_WCE
-#include <stddef.h>
-#include <stdlib.h>  // For strtoll/_strtoul64/malloc/free.
-#include <string.h>  // For memmove.
-
-#include <algorithm>
-#include <memory>
-#include <string>
-#include <vector>
-
-#include "gtest/internal/gtest-port.h"
-
-#if GTEST_CAN_STREAM_RESULTS_
-# include <arpa/inet.h>  // NOLINT
-# include <netdb.h>  // NOLINT
-#endif
-
-#if GTEST_OS_WINDOWS
-# include <windows.h>  // NOLINT
-#endif  // GTEST_OS_WINDOWS
-
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// Declares the flags.
-//
-// We don't want the users to modify this flag in the code, but want
-// Google Test's own unit tests to be able to access it. Therefore we
-// declare it here as opposed to in gtest.h.
-GTEST_DECLARE_bool_(death_test_use_fork);
-
-namespace internal {
-
-// The value of GetTestTypeId() as seen from within the Google Test
-// library.  This is solely for testing GetTestTypeId().
-GTEST_API_ extern const TypeId kTestTypeIdInGoogleTest;
-
-// Names of the flags (needed for parsing Google Test flags).
-const char kAlsoRunDisabledTestsFlag[] = "also_run_disabled_tests";
-const char kBreakOnFailureFlag[] = "break_on_failure";
-const char kCatchExceptionsFlag[] = "catch_exceptions";
-const char kColorFlag[] = "color";
-const char kFilterFlag[] = "filter";
-const char kListTestsFlag[] = "list_tests";
-const char kOutputFlag[] = "output";
-const char kPrintTimeFlag[] = "print_time";
-const char kPrintUTF8Flag[] = "print_utf8";
-const char kRandomSeedFlag[] = "random_seed";
-const char kRepeatFlag[] = "repeat";
-const char kShuffleFlag[] = "shuffle";
-const char kStackTraceDepthFlag[] = "stack_trace_depth";
-const char kStreamResultToFlag[] = "stream_result_to";
-const char kThrowOnFailureFlag[] = "throw_on_failure";
-const char kFlagfileFlag[] = "flagfile";
-
-// A valid random seed must be in [1, kMaxRandomSeed].
-const int kMaxRandomSeed = 99999;
-
-// g_help_flag is true if and only if the --help flag or an equivalent form
-// is specified on the command line.
-GTEST_API_ extern bool g_help_flag;
-
-// Returns the current time in milliseconds.
-GTEST_API_ TimeInMillis GetTimeInMillis();
-
-// Returns true if and only if Google Test should use colors in the output.
-GTEST_API_ bool ShouldUseColor(bool stdout_is_tty);
-
-// Formats the given time in milliseconds as seconds.
-GTEST_API_ std::string FormatTimeInMillisAsSeconds(TimeInMillis ms);
-
-// Converts the given time in milliseconds to a date string in the ISO 8601
-// format, without the timezone information.  N.B.: due to the use the
-// non-reentrant localtime() function, this function is not thread safe.  Do
-// not use it in any code that can be called from multiple threads.
-GTEST_API_ std::string FormatEpochTimeInMillisAsIso8601(TimeInMillis ms);
-
-// Parses a string for an Int32 flag, in the form of "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-GTEST_API_ bool ParseInt32Flag(
-    const char* str, const char* flag, Int32* value);
-
-// Returns a random seed in range [1, kMaxRandomSeed] based on the
-// given --gtest_random_seed flag value.
-inline int GetRandomSeedFromFlag(Int32 random_seed_flag) {
-  const unsigned int raw_seed = (random_seed_flag == 0) ?
-      static_cast<unsigned int>(GetTimeInMillis()) :
-      static_cast<unsigned int>(random_seed_flag);
-
-  // Normalizes the actual seed to range [1, kMaxRandomSeed] such that
-  // it's easy to type.
-  const int normalized_seed =
-      static_cast<int>((raw_seed - 1U) %
-                       static_cast<unsigned int>(kMaxRandomSeed)) + 1;
-  return normalized_seed;
-}
-
-// Returns the first valid random seed after 'seed'.  The behavior is
-// undefined if 'seed' is invalid.  The seed after kMaxRandomSeed is
-// considered to be 1.
-inline int GetNextRandomSeed(int seed) {
-  GTEST_CHECK_(1 <= seed && seed <= kMaxRandomSeed)
-      << "Invalid random seed " << seed << " - must be in [1, "
-      << kMaxRandomSeed << "].";
-  const int next_seed = seed + 1;
-  return (next_seed > kMaxRandomSeed) ? 1 : next_seed;
-}
-
-// This class saves the values of all Google Test flags in its c'tor, and
-// restores them in its d'tor.
-class GTestFlagSaver {
- public:
-  // The c'tor.
-  GTestFlagSaver() {
-    also_run_disabled_tests_ = GTEST_FLAG(also_run_disabled_tests);
-    break_on_failure_ = GTEST_FLAG(break_on_failure);
-    catch_exceptions_ = GTEST_FLAG(catch_exceptions);
-    color_ = GTEST_FLAG(color);
-    death_test_style_ = GTEST_FLAG(death_test_style);
-    death_test_use_fork_ = GTEST_FLAG(death_test_use_fork);
-    filter_ = GTEST_FLAG(filter);
-    internal_run_death_test_ = GTEST_FLAG(internal_run_death_test);
-    list_tests_ = GTEST_FLAG(list_tests);
-    output_ = GTEST_FLAG(output);
-    print_time_ = GTEST_FLAG(print_time);
-    print_utf8_ = GTEST_FLAG(print_utf8);
-    random_seed_ = GTEST_FLAG(random_seed);
-    repeat_ = GTEST_FLAG(repeat);
-    shuffle_ = GTEST_FLAG(shuffle);
-    stack_trace_depth_ = GTEST_FLAG(stack_trace_depth);
-    stream_result_to_ = GTEST_FLAG(stream_result_to);
-    throw_on_failure_ = GTEST_FLAG(throw_on_failure);
-  }
-
-  // The d'tor is not virtual.  DO NOT INHERIT FROM THIS CLASS.
-  ~GTestFlagSaver() {
-    GTEST_FLAG(also_run_disabled_tests) = also_run_disabled_tests_;
-    GTEST_FLAG(break_on_failure) = break_on_failure_;
-    GTEST_FLAG(catch_exceptions) = catch_exceptions_;
-    GTEST_FLAG(color) = color_;
-    GTEST_FLAG(death_test_style) = death_test_style_;
-    GTEST_FLAG(death_test_use_fork) = death_test_use_fork_;
-    GTEST_FLAG(filter) = filter_;
-    GTEST_FLAG(internal_run_death_test) = internal_run_death_test_;
-    GTEST_FLAG(list_tests) = list_tests_;
-    GTEST_FLAG(output) = output_;
-    GTEST_FLAG(print_time) = print_time_;
-    GTEST_FLAG(print_utf8) = print_utf8_;
-    GTEST_FLAG(random_seed) = random_seed_;
-    GTEST_FLAG(repeat) = repeat_;
-    GTEST_FLAG(shuffle) = shuffle_;
-    GTEST_FLAG(stack_trace_depth) = stack_trace_depth_;
-    GTEST_FLAG(stream_result_to) = stream_result_to_;
-    GTEST_FLAG(throw_on_failure) = throw_on_failure_;
-  }
-
- private:
-  // Fields for saving the original values of flags.
-  bool also_run_disabled_tests_;
-  bool break_on_failure_;
-  bool catch_exceptions_;
-  std::string color_;
-  std::string death_test_style_;
-  bool death_test_use_fork_;
-  std::string filter_;
-  std::string internal_run_death_test_;
-  bool list_tests_;
-  std::string output_;
-  bool print_time_;
-  bool print_utf8_;
-  internal::Int32 random_seed_;
-  internal::Int32 repeat_;
-  bool shuffle_;
-  internal::Int32 stack_trace_depth_;
-  std::string stream_result_to_;
-  bool throw_on_failure_;
-} GTEST_ATTRIBUTE_UNUSED_;
-
-// Converts a Unicode code point to a narrow string in UTF-8 encoding.
-// code_point parameter is of type UInt32 because wchar_t may not be
-// wide enough to contain a code point.
-// If the code_point is not a valid Unicode code point
-// (i.e. outside of Unicode range U+0 to U+10FFFF) it will be converted
-// to "(Invalid Unicode 0xXXXXXXXX)".
-GTEST_API_ std::string CodePointToUtf8(UInt32 code_point);
-
-// Converts a wide string to a narrow string in UTF-8 encoding.
-// The wide string is assumed to have the following encoding:
-//   UTF-16 if sizeof(wchar_t) == 2 (on Windows, Cygwin)
-//   UTF-32 if sizeof(wchar_t) == 4 (on Linux)
-// Parameter str points to a null-terminated wide string.
-// Parameter num_chars may additionally limit the number
-// of wchar_t characters processed. -1 is used when the entire string
-// should be processed.
-// If the string contains code points that are not valid Unicode code points
-// (i.e. outside of Unicode range U+0 to U+10FFFF) they will be output
-// as '(Invalid Unicode 0xXXXXXXXX)'. If the string is in UTF16 encoding
-// and contains invalid UTF-16 surrogate pairs, values in those pairs
-// will be encoded as individual Unicode characters from Basic Normal Plane.
-GTEST_API_ std::string WideStringToUtf8(const wchar_t* str, int num_chars);
-
-// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
-// if the variable is present. If a file already exists at this location, this
-// function will write over it. If the variable is present, but the file cannot
-// be created, prints an error and exits.
-void WriteToShardStatusFileIfNeeded();
-
-// Checks whether sharding is enabled by examining the relevant
-// environment variable values. If the variables are present,
-// but inconsistent (e.g., shard_index >= total_shards), prints
-// an error and exits. If in_subprocess_for_death_test, sharding is
-// disabled because it must only be applied to the original test
-// process. Otherwise, we could filter out death tests we intended to execute.
-GTEST_API_ bool ShouldShard(const char* total_shards_str,
-                            const char* shard_index_str,
-                            bool in_subprocess_for_death_test);
-
-// Parses the environment variable var as an Int32. If it is unset,
-// returns default_val. If it is not an Int32, prints an error and
-// and aborts.
-GTEST_API_ Int32 Int32FromEnvOrDie(const char* env_var, Int32 default_val);
-
-// Given the total number of shards, the shard index, and the test id,
-// returns true if and only if the test should be run on this shard. The test id
-// is some arbitrary but unique non-negative integer assigned to each test
-// method. Assumes that 0 <= shard_index < total_shards.
-GTEST_API_ bool ShouldRunTestOnShard(
-    int total_shards, int shard_index, int test_id);
-
-// STL container utilities.
-
-// Returns the number of elements in the given container that satisfy
-// the given predicate.
-template <class Container, typename Predicate>
-inline int CountIf(const Container& c, Predicate predicate) {
-  // Implemented as an explicit loop since std::count_if() in libCstd on
-  // Solaris has a non-standard signature.
-  int count = 0;
-  for (typename Container::const_iterator it = c.begin(); it != c.end(); ++it) {
-    if (predicate(*it))
-      ++count;
-  }
-  return count;
-}
-
-// Applies a function/functor to each element in the container.
-template <class Container, typename Functor>
-void ForEach(const Container& c, Functor functor) {
-  std::for_each(c.begin(), c.end(), functor);
-}
-
-// Returns the i-th element of the vector, or default_value if i is not
-// in range [0, v.size()).
-template <typename E>
-inline E GetElementOr(const std::vector<E>& v, int i, E default_value) {
-  return (i < 0 || i >= static_cast<int>(v.size())) ? default_value
-                                                    : v[static_cast<size_t>(i)];
-}
-
-// Performs an in-place shuffle of a range of the vector's elements.
-// 'begin' and 'end' are element indices as an STL-style range;
-// i.e. [begin, end) are shuffled, where 'end' == size() means to
-// shuffle to the end of the vector.
-template <typename E>
-void ShuffleRange(internal::Random* random, int begin, int end,
-                  std::vector<E>* v) {
-  const int size = static_cast<int>(v->size());
-  GTEST_CHECK_(0 <= begin && begin <= size)
-      << "Invalid shuffle range start " << begin << ": must be in range [0, "
-      << size << "].";
-  GTEST_CHECK_(begin <= end && end <= size)
-      << "Invalid shuffle range finish " << end << ": must be in range ["
-      << begin << ", " << size << "].";
-
-  // Fisher-Yates shuffle, from
-  // http://en.wikipedia.org/wiki/Fisher-Yates_shuffle
-  for (int range_width = end - begin; range_width >= 2; range_width--) {
-    const int last_in_range = begin + range_width - 1;
-    const int selected =
-        begin +
-        static_cast<int>(random->Generate(static_cast<UInt32>(range_width)));
-    std::swap((*v)[static_cast<size_t>(selected)],
-              (*v)[static_cast<size_t>(last_in_range)]);
-  }
-}
-
-// Performs an in-place shuffle of the vector's elements.
-template <typename E>
-inline void Shuffle(internal::Random* random, std::vector<E>* v) {
-  ShuffleRange(random, 0, static_cast<int>(v->size()), v);
-}
-
-// A function for deleting an object.  Handy for being used as a
-// functor.
-template <typename T>
-static void Delete(T* x) {
-  delete x;
-}
-
-// A predicate that checks the key of a TestProperty against a known key.
-//
-// TestPropertyKeyIs is copyable.
-class TestPropertyKeyIs {
- public:
-  // Constructor.
-  //
-  // TestPropertyKeyIs has NO default constructor.
-  explicit TestPropertyKeyIs(const std::string& key) : key_(key) {}
-
-  // Returns true if and only if the test name of test property matches on key_.
-  bool operator()(const TestProperty& test_property) const {
-    return test_property.key() == key_;
-  }
-
- private:
-  std::string key_;
-};
-
-// Class UnitTestOptions.
-//
-// This class contains functions for processing options the user
-// specifies when running the tests.  It has only static members.
-//
-// In most cases, the user can specify an option using either an
-// environment variable or a command line flag.  E.g. you can set the
-// test filter using either GTEST_FILTER or --gtest_filter.  If both
-// the variable and the flag are present, the latter overrides the
-// former.
-class GTEST_API_ UnitTestOptions {
- public:
-  // Functions for processing the gtest_output flag.
-
-  // Returns the output format, or "" for normal printed output.
-  static std::string GetOutputFormat();
-
-  // Returns the absolute path of the requested output file, or the
-  // default (test_detail.xml in the original working directory) if
-  // none was explicitly specified.
-  static std::string GetAbsolutePathToOutputFile();
-
-  // Functions for processing the gtest_filter flag.
-
-  // Returns true if and only if the wildcard pattern matches the string.
-  // The first ':' or '\0' character in pattern marks the end of it.
-  //
-  // This recursive algorithm isn't very efficient, but is clear and
-  // works well enough for matching test names, which are short.
-  static bool PatternMatchesString(const char *pattern, const char *str);
-
-  // Returns true if and only if the user-specified filter matches the test
-  // suite name and the test name.
-  static bool FilterMatchesTest(const std::string& test_suite_name,
-                                const std::string& test_name);
-
-#if GTEST_OS_WINDOWS
-  // Function for supporting the gtest_catch_exception flag.
-
-  // Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
-  // given SEH exception, or EXCEPTION_CONTINUE_SEARCH otherwise.
-  // This function is useful as an __except condition.
-  static int GTestShouldProcessSEH(DWORD exception_code);
-#endif  // GTEST_OS_WINDOWS
-
-  // Returns true if "name" matches the ':' separated list of glob-style
-  // filters in "filter".
-  static bool MatchesFilter(const std::string& name, const char* filter);
-};
-
-// Returns the current application's name, removing directory path if that
-// is present.  Used by UnitTestOptions::GetOutputFile.
-GTEST_API_ FilePath GetCurrentExecutableName();
-
-// The role interface for getting the OS stack trace as a string.
-class OsStackTraceGetterInterface {
- public:
-  OsStackTraceGetterInterface() {}
-  virtual ~OsStackTraceGetterInterface() {}
-
-  // Returns the current OS stack trace as an std::string.  Parameters:
-  //
-  //   max_depth  - the maximum number of stack frames to be included
-  //                in the trace.
-  //   skip_count - the number of top frames to be skipped; doesn't count
-  //                against max_depth.
-  virtual std::string CurrentStackTrace(int max_depth, int skip_count) = 0;
-
-  // UponLeavingGTest() should be called immediately before Google Test calls
-  // user code. It saves some information about the current stack that
-  // CurrentStackTrace() will use to find and hide Google Test stack frames.
-  virtual void UponLeavingGTest() = 0;
-
-  // This string is inserted in place of stack frames that are part of
-  // Google Test's implementation.
-  static const char* const kElidedFramesMarker;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(OsStackTraceGetterInterface);
-};
-
-// A working implementation of the OsStackTraceGetterInterface interface.
-class OsStackTraceGetter : public OsStackTraceGetterInterface {
- public:
-  OsStackTraceGetter() {}
-
-  std::string CurrentStackTrace(int max_depth, int skip_count) override;
-  void UponLeavingGTest() override;
-
- private:
-#if GTEST_HAS_ABSL
-  Mutex mutex_;  // Protects all internal state.
-
-  // We save the stack frame below the frame that calls user code.
-  // We do this because the address of the frame immediately below
-  // the user code changes between the call to UponLeavingGTest()
-  // and any calls to the stack trace code from within the user code.
-  void* caller_frame_ = nullptr;
-#endif  // GTEST_HAS_ABSL
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(OsStackTraceGetter);
-};
-
-// Information about a Google Test trace point.
-struct TraceInfo {
-  const char* file;
-  int line;
-  std::string message;
-};
-
-// This is the default global test part result reporter used in UnitTestImpl.
-// This class should only be used by UnitTestImpl.
-class DefaultGlobalTestPartResultReporter
-  : public TestPartResultReporterInterface {
- public:
-  explicit DefaultGlobalTestPartResultReporter(UnitTestImpl* unit_test);
-  // Implements the TestPartResultReporterInterface. Reports the test part
-  // result in the current test.
-  void ReportTestPartResult(const TestPartResult& result) override;
-
- private:
-  UnitTestImpl* const unit_test_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultGlobalTestPartResultReporter);
-};
-
-// This is the default per thread test part result reporter used in
-// UnitTestImpl. This class should only be used by UnitTestImpl.
-class DefaultPerThreadTestPartResultReporter
-    : public TestPartResultReporterInterface {
- public:
-  explicit DefaultPerThreadTestPartResultReporter(UnitTestImpl* unit_test);
-  // Implements the TestPartResultReporterInterface. The implementation just
-  // delegates to the current global test part result reporter of *unit_test_.
-  void ReportTestPartResult(const TestPartResult& result) override;
-
- private:
-  UnitTestImpl* const unit_test_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultPerThreadTestPartResultReporter);
-};
-
-// The private implementation of the UnitTest class.  We don't protect
-// the methods under a mutex, as this class is not accessible by a
-// user and the UnitTest class that delegates work to this class does
-// proper locking.
-class GTEST_API_ UnitTestImpl {
- public:
-  explicit UnitTestImpl(UnitTest* parent);
-  virtual ~UnitTestImpl();
-
-  // There are two different ways to register your own TestPartResultReporter.
-  // You can register your own repoter to listen either only for test results
-  // from the current thread or for results from all threads.
-  // By default, each per-thread test result repoter just passes a new
-  // TestPartResult to the global test result reporter, which registers the
-  // test part result for the currently running test.
-
-  // Returns the global test part result reporter.
-  TestPartResultReporterInterface* GetGlobalTestPartResultReporter();
-
-  // Sets the global test part result reporter.
-  void SetGlobalTestPartResultReporter(
-      TestPartResultReporterInterface* reporter);
-
-  // Returns the test part result reporter for the current thread.
-  TestPartResultReporterInterface* GetTestPartResultReporterForCurrentThread();
-
-  // Sets the test part result reporter for the current thread.
-  void SetTestPartResultReporterForCurrentThread(
-      TestPartResultReporterInterface* reporter);
-
-  // Gets the number of successful test suites.
-  int successful_test_suite_count() const;
-
-  // Gets the number of failed test suites.
-  int failed_test_suite_count() const;
-
-  // Gets the number of all test suites.
-  int total_test_suite_count() const;
-
-  // Gets the number of all test suites that contain at least one test
-  // that should run.
-  int test_suite_to_run_count() const;
-
-  // Gets the number of successful tests.
-  int successful_test_count() const;
-
-  // Gets the number of skipped tests.
-  int skipped_test_count() const;
-
-  // Gets the number of failed tests.
-  int failed_test_count() const;
-
-  // Gets the number of disabled tests that will be reported in the XML report.
-  int reportable_disabled_test_count() const;
-
-  // Gets the number of disabled tests.
-  int disabled_test_count() const;
-
-  // Gets the number of tests to be printed in the XML report.
-  int reportable_test_count() const;
-
-  // Gets the number of all tests.
-  int total_test_count() const;
-
-  // Gets the number of tests that should run.
-  int test_to_run_count() const;
-
-  // Gets the time of the test program start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const { return start_timestamp_; }
-
-  // Gets the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const { return elapsed_time_; }
-
-  // Returns true if and only if the unit test passed (i.e. all test suites
-  // passed).
-  bool Passed() const { return !Failed(); }
-
-  // Returns true if and only if the unit test failed (i.e. some test suite
-  // failed or something outside of all tests failed).
-  bool Failed() const {
-    return failed_test_suite_count() > 0 || ad_hoc_test_result()->Failed();
-  }
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  const TestSuite* GetTestSuite(int i) const {
-    const int index = GetElementOr(test_suite_indices_, i, -1);
-    return index < 0 ? nullptr : test_suites_[static_cast<size_t>(i)];
-  }
-
-  //  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const TestCase* GetTestCase(int i) const { return GetTestSuite(i); }
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  TestSuite* GetMutableSuiteCase(int i) {
-    const int index = GetElementOr(test_suite_indices_, i, -1);
-    return index < 0 ? nullptr : test_suites_[static_cast<size_t>(index)];
-  }
-
-  // Provides access to the event listener list.
-  TestEventListeners* listeners() { return &listeners_; }
-
-  // Returns the TestResult for the test that's currently running, or
-  // the TestResult for the ad hoc test if no test is running.
-  TestResult* current_test_result();
-
-  // Returns the TestResult for the ad hoc test.
-  const TestResult* ad_hoc_test_result() const { return &ad_hoc_test_result_; }
-
-  // Sets the OS stack trace getter.
-  //
-  // Does nothing if the input and the current OS stack trace getter
-  // are the same; otherwise, deletes the old getter and makes the
-  // input the current getter.
-  void set_os_stack_trace_getter(OsStackTraceGetterInterface* getter);
-
-  // Returns the current OS stack trace getter if it is not NULL;
-  // otherwise, creates an OsStackTraceGetter, makes it the current
-  // getter, and returns it.
-  OsStackTraceGetterInterface* os_stack_trace_getter();
-
-  // Returns the current OS stack trace as an std::string.
-  //
-  // The maximum number of stack frames to be included is specified by
-  // the gtest_stack_trace_depth flag.  The skip_count parameter
-  // specifies the number of top frames to be skipped, which doesn't
-  // count against the number of frames to be included.
-  //
-  // For example, if Foo() calls Bar(), which in turn calls
-  // CurrentOsStackTraceExceptTop(1), Foo() will be included in the
-  // trace but Bar() and CurrentOsStackTraceExceptTop() won't.
-  std::string CurrentOsStackTraceExceptTop(int skip_count) GTEST_NO_INLINE_;
-
-  // Finds and returns a TestSuite with the given name.  If one doesn't
-  // exist, creates one and returns it.
-  //
-  // Arguments:
-  //
-  //   test_suite_name: name of the test suite
-  //   type_param:     the name of the test's type parameter, or NULL if
-  //                   this is not a typed or a type-parameterized test.
-  //   set_up_tc:      pointer to the function that sets up the test suite
-  //   tear_down_tc:   pointer to the function that tears down the test suite
-  TestSuite* GetTestSuite(const char* test_suite_name, const char* type_param,
-                          internal::SetUpTestSuiteFunc set_up_tc,
-                          internal::TearDownTestSuiteFunc tear_down_tc);
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  TestCase* GetTestCase(const char* test_case_name, const char* type_param,
-                        internal::SetUpTestSuiteFunc set_up_tc,
-                        internal::TearDownTestSuiteFunc tear_down_tc) {
-    return GetTestSuite(test_case_name, type_param, set_up_tc, tear_down_tc);
-  }
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Adds a TestInfo to the unit test.
-  //
-  // Arguments:
-  //
-  //   set_up_tc:    pointer to the function that sets up the test suite
-  //   tear_down_tc: pointer to the function that tears down the test suite
-  //   test_info:    the TestInfo object
-  void AddTestInfo(internal::SetUpTestSuiteFunc set_up_tc,
-                   internal::TearDownTestSuiteFunc tear_down_tc,
-                   TestInfo* test_info) {
-    // In order to support thread-safe death tests, we need to
-    // remember the original working directory when the test program
-    // was first invoked.  We cannot do this in RUN_ALL_TESTS(), as
-    // the user may have changed the current directory before calling
-    // RUN_ALL_TESTS().  Therefore we capture the current directory in
-    // AddTestInfo(), which is called to register a TEST or TEST_F
-    // before main() is reached.
-    if (original_working_dir_.IsEmpty()) {
-      original_working_dir_.Set(FilePath::GetCurrentDir());
-      GTEST_CHECK_(!original_working_dir_.IsEmpty())
-          << "Failed to get the current working directory.";
-    }
-
-    GetTestSuite(test_info->test_suite_name(), test_info->type_param(),
-                 set_up_tc, tear_down_tc)
-        ->AddTestInfo(test_info);
-  }
-
-  // Returns ParameterizedTestSuiteRegistry object used to keep track of
-  // value-parameterized tests and instantiate and register them.
-  internal::ParameterizedTestSuiteRegistry& parameterized_test_registry() {
-    return parameterized_test_registry_;
-  }
-
-  // Sets the TestSuite object for the test that's currently running.
-  void set_current_test_suite(TestSuite* a_current_test_suite) {
-    current_test_suite_ = a_current_test_suite;
-  }
-
-  // Sets the TestInfo object for the test that's currently running.  If
-  // current_test_info is NULL, the assertion results will be stored in
-  // ad_hoc_test_result_.
-  void set_current_test_info(TestInfo* a_current_test_info) {
-    current_test_info_ = a_current_test_info;
-  }
-
-  // Registers all parameterized tests defined using TEST_P and
-  // INSTANTIATE_TEST_SUITE_P, creating regular tests for each test/parameter
-  // combination. This method can be called more then once; it has guards
-  // protecting from registering the tests more then once.  If
-  // value-parameterized tests are disabled, RegisterParameterizedTests is
-  // present but does nothing.
-  void RegisterParameterizedTests();
-
-  // Runs all tests in this UnitTest object, prints the result, and
-  // returns true if all tests are successful.  If any exception is
-  // thrown during a test, this test is considered to be failed, but
-  // the rest of the tests will still be run.
-  bool RunAllTests();
-
-  // Clears the results of all tests, except the ad hoc tests.
-  void ClearNonAdHocTestResult() {
-    ForEach(test_suites_, TestSuite::ClearTestSuiteResult);
-  }
-
-  // Clears the results of ad-hoc test assertions.
-  void ClearAdHocTestResult() {
-    ad_hoc_test_result_.Clear();
-  }
-
-  // Adds a TestProperty to the current TestResult object when invoked in a
-  // context of a test or a test suite, or to the global property set. If the
-  // result already contains a property with the same key, the value will be
-  // updated.
-  void RecordProperty(const TestProperty& test_property);
-
-  enum ReactionToSharding {
-    HONOR_SHARDING_PROTOCOL,
-    IGNORE_SHARDING_PROTOCOL
-  };
-
-  // Matches the full name of each test against the user-specified
-  // filter to decide whether the test should run, then records the
-  // result in each TestSuite and TestInfo object.
-  // If shard_tests == HONOR_SHARDING_PROTOCOL, further filters tests
-  // based on sharding variables in the environment.
-  // Returns the number of tests that should run.
-  int FilterTests(ReactionToSharding shard_tests);
-
-  // Prints the names of the tests matching the user-specified filter flag.
-  void ListTestsMatchingFilter();
-
-  const TestSuite* current_test_suite() const { return current_test_suite_; }
-  TestInfo* current_test_info() { return current_test_info_; }
-  const TestInfo* current_test_info() const { return current_test_info_; }
-
-  // Returns the vector of environments that need to be set-up/torn-down
-  // before/after the tests are run.
-  std::vector<Environment*>& environments() { return environments_; }
-
-  // Getters for the per-thread Google Test trace stack.
-  std::vector<TraceInfo>& gtest_trace_stack() {
-    return *(gtest_trace_stack_.pointer());
-  }
-  const std::vector<TraceInfo>& gtest_trace_stack() const {
-    return gtest_trace_stack_.get();
-  }
-
-#if GTEST_HAS_DEATH_TEST
-  void InitDeathTestSubprocessControlInfo() {
-    internal_run_death_test_flag_.reset(ParseInternalRunDeathTestFlag());
-  }
-  // Returns a pointer to the parsed --gtest_internal_run_death_test
-  // flag, or NULL if that flag was not specified.
-  // This information is useful only in a death test child process.
-  // Must not be called before a call to InitGoogleTest.
-  const InternalRunDeathTestFlag* internal_run_death_test_flag() const {
-    return internal_run_death_test_flag_.get();
-  }
-
-  // Returns a pointer to the current death test factory.
-  internal::DeathTestFactory* death_test_factory() {
-    return death_test_factory_.get();
-  }
-
-  void SuppressTestEventsIfInSubprocess();
-
-  friend class ReplaceDeathTestFactory;
-#endif  // GTEST_HAS_DEATH_TEST
-
-  // Initializes the event listener performing XML output as specified by
-  // UnitTestOptions. Must not be called before InitGoogleTest.
-  void ConfigureXmlOutput();
-
-#if GTEST_CAN_STREAM_RESULTS_
-  // Initializes the event listener for streaming test results to a socket.
-  // Must not be called before InitGoogleTest.
-  void ConfigureStreamingOutput();
-#endif
-
-  // Performs initialization dependent upon flag values obtained in
-  // ParseGoogleTestFlagsOnly.  Is called from InitGoogleTest after the call to
-  // ParseGoogleTestFlagsOnly.  In case a user neglects to call InitGoogleTest
-  // this function is also called from RunAllTests.  Since this function can be
-  // called more than once, it has to be idempotent.
-  void PostFlagParsingInit();
-
-  // Gets the random seed used at the start of the current test iteration.
-  int random_seed() const { return random_seed_; }
-
-  // Gets the random number generator.
-  internal::Random* random() { return &random_; }
-
-  // Shuffles all test suites, and the tests within each test suite,
-  // making sure that death tests are still run first.
-  void ShuffleTests();
-
-  // Restores the test suites and tests to their order before the first shuffle.
-  void UnshuffleTests();
-
-  // Returns the value of GTEST_FLAG(catch_exceptions) at the moment
-  // UnitTest::Run() starts.
-  bool catch_exceptions() const { return catch_exceptions_; }
-
- private:
-  friend class ::testing::UnitTest;
-
-  // Used by UnitTest::Run() to capture the state of
-  // GTEST_FLAG(catch_exceptions) at the moment it starts.
-  void set_catch_exceptions(bool value) { catch_exceptions_ = value; }
-
-  // The UnitTest object that owns this implementation object.
-  UnitTest* const parent_;
-
-  // The working directory when the first TEST() or TEST_F() was
-  // executed.
-  internal::FilePath original_working_dir_;
-
-  // The default test part result reporters.
-  DefaultGlobalTestPartResultReporter default_global_test_part_result_reporter_;
-  DefaultPerThreadTestPartResultReporter
-      default_per_thread_test_part_result_reporter_;
-
-  // Points to (but doesn't own) the global test part result reporter.
-  TestPartResultReporterInterface* global_test_part_result_repoter_;
-
-  // Protects read and write access to global_test_part_result_reporter_.
-  internal::Mutex global_test_part_result_reporter_mutex_;
-
-  // Points to (but doesn't own) the per-thread test part result reporter.
-  internal::ThreadLocal<TestPartResultReporterInterface*>
-      per_thread_test_part_result_reporter_;
-
-  // The vector of environments that need to be set-up/torn-down
-  // before/after the tests are run.
-  std::vector<Environment*> environments_;
-
-  // The vector of TestSuites in their original order.  It owns the
-  // elements in the vector.
-  std::vector<TestSuite*> test_suites_;
-
-  // Provides a level of indirection for the test suite list to allow
-  // easy shuffling and restoring the test suite order.  The i-th
-  // element of this vector is the index of the i-th test suite in the
-  // shuffled order.
-  std::vector<int> test_suite_indices_;
-
-  // ParameterizedTestRegistry object used to register value-parameterized
-  // tests.
-  internal::ParameterizedTestSuiteRegistry parameterized_test_registry_;
-
-  // Indicates whether RegisterParameterizedTests() has been called already.
-  bool parameterized_tests_registered_;
-
-  // Index of the last death test suite registered.  Initially -1.
-  int last_death_test_suite_;
-
-  // This points to the TestSuite for the currently running test.  It
-  // changes as Google Test goes through one test suite after another.
-  // When no test is running, this is set to NULL and Google Test
-  // stores assertion results in ad_hoc_test_result_.  Initially NULL.
-  TestSuite* current_test_suite_;
-
-  // This points to the TestInfo for the currently running test.  It
-  // changes as Google Test goes through one test after another.  When
-  // no test is running, this is set to NULL and Google Test stores
-  // assertion results in ad_hoc_test_result_.  Initially NULL.
-  TestInfo* current_test_info_;
-
-  // Normally, a user only writes assertions inside a TEST or TEST_F,
-  // or inside a function called by a TEST or TEST_F.  Since Google
-  // Test keeps track of which test is current running, it can
-  // associate such an assertion with the test it belongs to.
-  //
-  // If an assertion is encountered when no TEST or TEST_F is running,
-  // Google Test attributes the assertion result to an imaginary "ad hoc"
-  // test, and records the result in ad_hoc_test_result_.
-  TestResult ad_hoc_test_result_;
-
-  // The list of event listeners that can be used to track events inside
-  // Google Test.
-  TestEventListeners listeners_;
-
-  // The OS stack trace getter.  Will be deleted when the UnitTest
-  // object is destructed.  By default, an OsStackTraceGetter is used,
-  // but the user can set this field to use a custom getter if that is
-  // desired.
-  OsStackTraceGetterInterface* os_stack_trace_getter_;
-
-  // True if and only if PostFlagParsingInit() has been called.
-  bool post_flag_parse_init_performed_;
-
-  // The random number seed used at the beginning of the test run.
-  int random_seed_;
-
-  // Our random number generator.
-  internal::Random random_;
-
-  // The time of the test program start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp_;
-
-  // How long the test took to run, in milliseconds.
-  TimeInMillis elapsed_time_;
-
-#if GTEST_HAS_DEATH_TEST
-  // The decomposed components of the gtest_internal_run_death_test flag,
-  // parsed when RUN_ALL_TESTS is called.
-  std::unique_ptr<InternalRunDeathTestFlag> internal_run_death_test_flag_;
-  std::unique_ptr<internal::DeathTestFactory> death_test_factory_;
-#endif  // GTEST_HAS_DEATH_TEST
-
-  // A per-thread stack of traces created by the SCOPED_TRACE() macro.
-  internal::ThreadLocal<std::vector<TraceInfo> > gtest_trace_stack_;
-
-  // The value of GTEST_FLAG(catch_exceptions) at the moment RunAllTests()
-  // starts.
-  bool catch_exceptions_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(UnitTestImpl);
-};  // class UnitTestImpl
-
-// Convenience function for accessing the global UnitTest
-// implementation object.
-inline UnitTestImpl* GetUnitTestImpl() {
-  return UnitTest::GetInstance()->impl();
-}
-
-#if GTEST_USES_SIMPLE_RE
-
-// Internal helper functions for implementing the simple regular
-// expression matcher.
-GTEST_API_ bool IsInSet(char ch, const char* str);
-GTEST_API_ bool IsAsciiDigit(char ch);
-GTEST_API_ bool IsAsciiPunct(char ch);
-GTEST_API_ bool IsRepeat(char ch);
-GTEST_API_ bool IsAsciiWhiteSpace(char ch);
-GTEST_API_ bool IsAsciiWordChar(char ch);
-GTEST_API_ bool IsValidEscape(char ch);
-GTEST_API_ bool AtomMatchesChar(bool escaped, char pattern, char ch);
-GTEST_API_ bool ValidateRegex(const char* regex);
-GTEST_API_ bool MatchRegexAtHead(const char* regex, const char* str);
-GTEST_API_ bool MatchRepetitionAndRegexAtHead(
-    bool escaped, char ch, char repeat, const char* regex, const char* str);
-GTEST_API_ bool MatchRegexAnywhere(const char* regex, const char* str);
-
-#endif  // GTEST_USES_SIMPLE_RE
-
-// Parses the command line for Google Test flags, without initializing
-// other parts of Google Test.
-GTEST_API_ void ParseGoogleTestFlagsOnly(int* argc, char** argv);
-GTEST_API_ void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv);
-
-#if GTEST_HAS_DEATH_TEST
-
-// Returns the message describing the last system error, regardless of the
-// platform.
-GTEST_API_ std::string GetLastErrnoDescription();
-
-// Attempts to parse a string into a positive integer pointed to by the
-// number parameter.  Returns true if that is possible.
-// GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we can use
-// it here.
-template <typename Integer>
-bool ParseNaturalNumber(const ::std::string& str, Integer* number) {
-  // Fail fast if the given string does not begin with a digit;
-  // this bypasses strtoXXX's "optional leading whitespace and plus
-  // or minus sign" semantics, which are undesirable here.
-  if (str.empty() || !IsDigit(str[0])) {
-    return false;
-  }
-  errno = 0;
-
-  char* end;
-  // BiggestConvertible is the largest integer type that system-provided
-  // string-to-number conversion routines can return.
-
-# if GTEST_OS_WINDOWS && !defined(__GNUC__)
-
-  // MSVC and C++ Builder define __int64 instead of the standard long long.
-  typedef unsigned __int64 BiggestConvertible;
-  const BiggestConvertible parsed = _strtoui64(str.c_str(), &end, 10);
-
-# else
-
-  typedef unsigned long long BiggestConvertible;  // NOLINT
-  const BiggestConvertible parsed = strtoull(str.c_str(), &end, 10);
-
-# endif  // GTEST_OS_WINDOWS && !defined(__GNUC__)
-
-  const bool parse_success = *end == '\0' && errno == 0;
-
-  GTEST_CHECK_(sizeof(Integer) <= sizeof(parsed));
-
-  const Integer result = static_cast<Integer>(parsed);
-  if (parse_success && static_cast<BiggestConvertible>(result) == parsed) {
-    *number = result;
-    return true;
-  }
-  return false;
-}
-#endif  // GTEST_HAS_DEATH_TEST
-
-// TestResult contains some private methods that should be hidden from
-// Google Test user but are required for testing. This class allow our tests
-// to access them.
-//
-// This class is supplied only for the purpose of testing Google Test's own
-// constructs. Do not use it in user tests, either directly or indirectly.
-class TestResultAccessor {
- public:
-  static void RecordProperty(TestResult* test_result,
-                             const std::string& xml_element,
-                             const TestProperty& property) {
-    test_result->RecordProperty(xml_element, property);
-  }
-
-  static void ClearTestPartResults(TestResult* test_result) {
-    test_result->ClearTestPartResults();
-  }
-
-  static const std::vector<testing::TestPartResult>& test_part_results(
-      const TestResult& test_result) {
-    return test_result.test_part_results();
-  }
-};
-
-#if GTEST_CAN_STREAM_RESULTS_
-
-// Streams test results to the given port on the given host machine.
-class StreamingListener : public EmptyTestEventListener {
- public:
-  // Abstract base class for writing strings to a socket.
-  class AbstractSocketWriter {
-   public:
-    virtual ~AbstractSocketWriter() {}
-
-    // Sends a string to the socket.
-    virtual void Send(const std::string& message) = 0;
-
-    // Closes the socket.
-    virtual void CloseConnection() {}
-
-    // Sends a string and a newline to the socket.
-    void SendLn(const std::string& message) { Send(message + "\n"); }
-  };
-
-  // Concrete class for actually writing strings to a socket.
-  class SocketWriter : public AbstractSocketWriter {
-   public:
-    SocketWriter(const std::string& host, const std::string& port)
-        : sockfd_(-1), host_name_(host), port_num_(port) {
-      MakeConnection();
-    }
-
-    ~SocketWriter() override {
-      if (sockfd_ != -1)
-        CloseConnection();
-    }
-
-    // Sends a string to the socket.
-    void Send(const std::string& message) override {
-      GTEST_CHECK_(sockfd_ != -1)
-          << "Send() can be called only when there is a connection.";
-
-      const auto len = static_cast<size_t>(message.length());
-      if (write(sockfd_, message.c_str(), len) != static_cast<ssize_t>(len)) {
-        GTEST_LOG_(WARNING)
-            << "stream_result_to: failed to stream to "
-            << host_name_ << ":" << port_num_;
-      }
-    }
-
-   private:
-    // Creates a client socket and connects to the server.
-    void MakeConnection();
-
-    // Closes the socket.
-    void CloseConnection() override {
-      GTEST_CHECK_(sockfd_ != -1)
-          << "CloseConnection() can be called only when there is a connection.";
-
-      close(sockfd_);
-      sockfd_ = -1;
-    }
-
-    int sockfd_;  // socket file descriptor
-    const std::string host_name_;
-    const std::string port_num_;
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(SocketWriter);
-  };  // class SocketWriter
-
-  // Escapes '=', '&', '%', and '\n' characters in str as "%xx".
-  static std::string UrlEncode(const char* str);
-
-  StreamingListener(const std::string& host, const std::string& port)
-      : socket_writer_(new SocketWriter(host, port)) {
-    Start();
-  }
-
-  explicit StreamingListener(AbstractSocketWriter* socket_writer)
-      : socket_writer_(socket_writer) { Start(); }
-
-  void OnTestProgramStart(const UnitTest& /* unit_test */) override {
-    SendLn("event=TestProgramStart");
-  }
-
-  void OnTestProgramEnd(const UnitTest& unit_test) override {
-    // Note that Google Test current only report elapsed time for each
-    // test iteration, not for the entire test program.
-    SendLn("event=TestProgramEnd&passed=" + FormatBool(unit_test.Passed()));
-
-    // Notify the streaming server to stop.
-    socket_writer_->CloseConnection();
-  }
-
-  void OnTestIterationStart(const UnitTest& /* unit_test */,
-                            int iteration) override {
-    SendLn("event=TestIterationStart&iteration=" +
-           StreamableToString(iteration));
-  }
-
-  void OnTestIterationEnd(const UnitTest& unit_test,
-                          int /* iteration */) override {
-    SendLn("event=TestIterationEnd&passed=" +
-           FormatBool(unit_test.Passed()) + "&elapsed_time=" +
-           StreamableToString(unit_test.elapsed_time()) + "ms");
-  }
-
-  // Note that "event=TestCaseStart" is a wire format and has to remain
-  // "case" for compatibilty
-  void OnTestCaseStart(const TestCase& test_case) override {
-    SendLn(std::string("event=TestCaseStart&name=") + test_case.name());
-  }
-
-  // Note that "event=TestCaseEnd" is a wire format and has to remain
-  // "case" for compatibilty
-  void OnTestCaseEnd(const TestCase& test_case) override {
-    SendLn("event=TestCaseEnd&passed=" + FormatBool(test_case.Passed()) +
-           "&elapsed_time=" + StreamableToString(test_case.elapsed_time()) +
-           "ms");
-  }
-
-  void OnTestStart(const TestInfo& test_info) override {
-    SendLn(std::string("event=TestStart&name=") + test_info.name());
-  }
-
-  void OnTestEnd(const TestInfo& test_info) override {
-    SendLn("event=TestEnd&passed=" +
-           FormatBool((test_info.result())->Passed()) +
-           "&elapsed_time=" +
-           StreamableToString((test_info.result())->elapsed_time()) + "ms");
-  }
-
-  void OnTestPartResult(const TestPartResult& test_part_result) override {
-    const char* file_name = test_part_result.file_name();
-    if (file_name == nullptr) file_name = "";
-    SendLn("event=TestPartResult&file=" + UrlEncode(file_name) +
-           "&line=" + StreamableToString(test_part_result.line_number()) +
-           "&message=" + UrlEncode(test_part_result.message()));
-  }
-
- private:
-  // Sends the given message and a newline to the socket.
-  void SendLn(const std::string& message) { socket_writer_->SendLn(message); }
-
-  // Called at the start of streaming to notify the receiver what
-  // protocol we are using.
-  void Start() { SendLn("gtest_streaming_protocol_version=1.0"); }
-
-  std::string FormatBool(bool value) { return value ? "1" : "0"; }
-
-  const std::unique_ptr<AbstractSocketWriter> socket_writer_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(StreamingListener);
-};  // class StreamingListener
-
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-}  // namespace internal
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GTEST_SRC_GTEST_INTERNAL_INL_H_
diff --git a/3rdparty/gtest/src/gtest-matchers.cc b/3rdparty/gtest/src/gtest-matchers.cc
deleted file mode 100644
index 7d2fb685..00000000
--- a/3rdparty/gtest/src/gtest-matchers.cc
+++ /dev/null
@@ -1,97 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file implements just enough of the matcher interface to allow
-// EXPECT_DEATH and friends to accept a matcher argument.
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-port.h"
-#include "gtest/gtest-matchers.h"
-
-#include <string>
-
-namespace testing {
-
-// Constructs a matcher that matches a const std::string& whose value is
-// equal to s.
-Matcher<const std::string&>::Matcher(const std::string& s) { *this = Eq(s); }
-
-// Constructs a matcher that matches a const std::string& whose value is
-// equal to s.
-Matcher<const std::string&>::Matcher(const char* s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a std::string whose value is equal to
-// s.
-Matcher<std::string>::Matcher(const std::string& s) { *this = Eq(s); }
-
-// Constructs a matcher that matches a std::string whose value is equal to
-// s.
-Matcher<std::string>::Matcher(const char* s) { *this = Eq(std::string(s)); }
-
-#if GTEST_HAS_ABSL
-// Constructs a matcher that matches a const absl::string_view& whose value is
-// equal to s.
-Matcher<const absl::string_view&>::Matcher(const std::string& s) {
-  *this = Eq(s);
-}
-
-// Constructs a matcher that matches a const absl::string_view& whose value is
-// equal to s.
-Matcher<const absl::string_view&>::Matcher(const char* s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a const absl::string_view& whose value is
-// equal to s.
-Matcher<const absl::string_view&>::Matcher(absl::string_view s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a absl::string_view whose value is equal to
-// s.
-Matcher<absl::string_view>::Matcher(const std::string& s) { *this = Eq(s); }
-
-// Constructs a matcher that matches a absl::string_view whose value is equal to
-// s.
-Matcher<absl::string_view>::Matcher(const char* s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a absl::string_view whose value is equal to
-// s.
-Matcher<absl::string_view>::Matcher(absl::string_view s) {
-  *this = Eq(std::string(s));
-}
-#endif  // GTEST_HAS_ABSL
-
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest-port.cc b/3rdparty/gtest/src/gtest-port.cc
deleted file mode 100644
index fc5ba6be..00000000
--- a/3rdparty/gtest/src/gtest-port.cc
+++ /dev/null
@@ -1,1399 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/internal/gtest-port.h"
-
-#include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fstream>
-#include <memory>
-
-#if GTEST_OS_WINDOWS
-# include <windows.h>
-# include <io.h>
-# include <sys/stat.h>
-# include <map>  // Used in ThreadLocal.
-# ifdef _MSC_VER
-#  include <crtdbg.h>
-# endif  // _MSC_VER
-#else
-# include <unistd.h>
-#endif  // GTEST_OS_WINDOWS
-
-#if GTEST_OS_MAC
-# include <mach/mach_init.h>
-# include <mach/task.h>
-# include <mach/vm_map.h>
-#endif  // GTEST_OS_MAC
-
-#if GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
-    GTEST_OS_NETBSD || GTEST_OS_OPENBSD
-# include <sys/sysctl.h>
-# if GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD
-#  include <sys/user.h>
-# endif
-#endif
-
-#if GTEST_OS_QNX
-# include <devctl.h>
-# include <fcntl.h>
-# include <sys/procfs.h>
-#endif  // GTEST_OS_QNX
-
-#if GTEST_OS_AIX
-# include <procinfo.h>
-# include <sys/types.h>
-#endif  // GTEST_OS_AIX
-
-#if GTEST_OS_FUCHSIA
-# include <zircon/process.h>
-# include <zircon/syscalls.h>
-#endif  // GTEST_OS_FUCHSIA
-
-#include "gtest/gtest-spi.h"
-#include "gtest/gtest-message.h"
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-string.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-namespace internal {
-
-#if defined(_MSC_VER) || defined(__BORLANDC__)
-// MSVC and C++Builder do not provide a definition of STDERR_FILENO.
-const int kStdOutFileno = 1;
-const int kStdErrFileno = 2;
-#else
-const int kStdOutFileno = STDOUT_FILENO;
-const int kStdErrFileno = STDERR_FILENO;
-#endif  // _MSC_VER
-
-#if GTEST_OS_LINUX
-
-namespace {
-template <typename T>
-T ReadProcFileField(const std::string& filename, int field) {
-  std::string dummy;
-  std::ifstream file(filename.c_str());
-  while (field-- > 0) {
-    file >> dummy;
-  }
-  T output = 0;
-  file >> output;
-  return output;
-}
-}  // namespace
-
-// Returns the number of active threads, or 0 when there is an error.
-size_t GetThreadCount() {
-  const std::string filename =
-      (Message() << "/proc/" << getpid() << "/stat").GetString();
-  return ReadProcFileField<size_t>(filename, 19);
-}
-
-#elif GTEST_OS_MAC
-
-size_t GetThreadCount() {
-  const task_t task = mach_task_self();
-  mach_msg_type_number_t thread_count;
-  thread_act_array_t thread_list;
-  const kern_return_t status = task_threads(task, &thread_list, &thread_count);
-  if (status == KERN_SUCCESS) {
-    // task_threads allocates resources in thread_list and we need to free them
-    // to avoid leaks.
-    vm_deallocate(task,
-                  reinterpret_cast<vm_address_t>(thread_list),
-                  sizeof(thread_t) * thread_count);
-    return static_cast<size_t>(thread_count);
-  } else {
-    return 0;
-  }
-}
-
-#elif GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
-      GTEST_OS_NETBSD
-
-#if GTEST_OS_NETBSD
-#undef KERN_PROC
-#define KERN_PROC KERN_PROC2
-#define kinfo_proc kinfo_proc2
-#endif
-
-#if GTEST_OS_DRAGONFLY
-#define KP_NLWP(kp) (kp.kp_nthreads)
-#elif GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD
-#define KP_NLWP(kp) (kp.ki_numthreads)
-#elif GTEST_OS_NETBSD
-#define KP_NLWP(kp) (kp.p_nlwps)
-#endif
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-size_t GetThreadCount() {
-  int mib[] = {
-    CTL_KERN,
-    KERN_PROC,
-    KERN_PROC_PID,
-    getpid(),
-#if GTEST_OS_NETBSD
-    sizeof(struct kinfo_proc),
-    1,
-#endif
-  };
-  u_int miblen = sizeof(mib) / sizeof(mib[0]);
-  struct kinfo_proc info;
-  size_t size = sizeof(info);
-  if (sysctl(mib, miblen, &info, &size, NULL, 0)) {
-    return 0;
-  }
-  return static_cast<size_t>(KP_NLWP(info));
-}
-#elif GTEST_OS_OPENBSD
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-size_t GetThreadCount() {
-  int mib[] = {
-    CTL_KERN,
-    KERN_PROC,
-    KERN_PROC_PID | KERN_PROC_SHOW_THREADS,
-    getpid(),
-    sizeof(struct kinfo_proc),
-    0,
-  };
-  u_int miblen = sizeof(mib) / sizeof(mib[0]);
-
-  // get number of structs
-  size_t size;
-  if (sysctl(mib, miblen, NULL, &size, NULL, 0)) {
-    return 0;
-  }
-  mib[5] = size / mib[4];
-
-  // populate array of structs
-  struct kinfo_proc info[mib[5]];
-  if (sysctl(mib, miblen, &info, &size, NULL, 0)) {
-    return 0;
-  }
-
-  // exclude empty members
-  int nthreads = 0;
-  for (int i = 0; i < size / mib[4]; i++) {
-    if (info[i].p_tid != -1)
-      nthreads++;
-  }
-  return nthreads;
-}
-
-#elif GTEST_OS_QNX
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-size_t GetThreadCount() {
-  const int fd = open("/proc/self/as", O_RDONLY);
-  if (fd < 0) {
-    return 0;
-  }
-  procfs_info process_info;
-  const int status =
-      devctl(fd, DCMD_PROC_INFO, &process_info, sizeof(process_info), nullptr);
-  close(fd);
-  if (status == EOK) {
-    return static_cast<size_t>(process_info.num_threads);
-  } else {
-    return 0;
-  }
-}
-
-#elif GTEST_OS_AIX
-
-size_t GetThreadCount() {
-  struct procentry64 entry;
-  pid_t pid = getpid();
-  int status = getprocs64(&entry, sizeof(entry), nullptr, 0, &pid, 1);
-  if (status == 1) {
-    return entry.pi_thcount;
-  } else {
-    return 0;
-  }
-}
-
-#elif GTEST_OS_FUCHSIA
-
-size_t GetThreadCount() {
-  int dummy_buffer;
-  size_t avail;
-  zx_status_t status = zx_object_get_info(
-      zx_process_self(),
-      ZX_INFO_PROCESS_THREADS,
-      &dummy_buffer,
-      0,
-      nullptr,
-      &avail);
-  if (status == ZX_OK) {
-    return avail;
-  } else {
-    return 0;
-  }
-}
-
-#else
-
-size_t GetThreadCount() {
-  // There's no portable way to detect the number of threads, so we just
-  // return 0 to indicate that we cannot detect it.
-  return 0;
-}
-
-#endif  // GTEST_OS_LINUX
-
-#if GTEST_IS_THREADSAFE && GTEST_OS_WINDOWS
-
-void SleepMilliseconds(int n) {
-  ::Sleep(static_cast<DWORD>(n));
-}
-
-AutoHandle::AutoHandle()
-    : handle_(INVALID_HANDLE_VALUE) {}
-
-AutoHandle::AutoHandle(Handle handle)
-    : handle_(handle) {}
-
-AutoHandle::~AutoHandle() {
-  Reset();
-}
-
-AutoHandle::Handle AutoHandle::Get() const {
-  return handle_;
-}
-
-void AutoHandle::Reset() {
-  Reset(INVALID_HANDLE_VALUE);
-}
-
-void AutoHandle::Reset(HANDLE handle) {
-  // Resetting with the same handle we already own is invalid.
-  if (handle_ != handle) {
-    if (IsCloseable()) {
-      ::CloseHandle(handle_);
-    }
-    handle_ = handle;
-  } else {
-    GTEST_CHECK_(!IsCloseable())
-        << "Resetting a valid handle to itself is likely a programmer error "
-            "and thus not allowed.";
-  }
-}
-
-bool AutoHandle::IsCloseable() const {
-  // Different Windows APIs may use either of these values to represent an
-  // invalid handle.
-  return handle_ != nullptr && handle_ != INVALID_HANDLE_VALUE;
-}
-
-Notification::Notification()
-    : event_(::CreateEvent(nullptr,     // Default security attributes.
-                           TRUE,        // Do not reset automatically.
-                           FALSE,       // Initially unset.
-                           nullptr)) {  // Anonymous event.
-  GTEST_CHECK_(event_.Get() != nullptr);
-}
-
-void Notification::Notify() {
-  GTEST_CHECK_(::SetEvent(event_.Get()) != FALSE);
-}
-
-void Notification::WaitForNotification() {
-  GTEST_CHECK_(
-      ::WaitForSingleObject(event_.Get(), INFINITE) == WAIT_OBJECT_0);
-}
-
-Mutex::Mutex()
-    : owner_thread_id_(0),
-      type_(kDynamic),
-      critical_section_init_phase_(0),
-      critical_section_(new CRITICAL_SECTION) {
-  ::InitializeCriticalSection(critical_section_);
-}
-
-Mutex::~Mutex() {
-  // Static mutexes are leaked intentionally. It is not thread-safe to try
-  // to clean them up.
-  if (type_ == kDynamic) {
-    ::DeleteCriticalSection(critical_section_);
-    delete critical_section_;
-    critical_section_ = nullptr;
-  }
-}
-
-void Mutex::Lock() {
-  ThreadSafeLazyInit();
-  ::EnterCriticalSection(critical_section_);
-  owner_thread_id_ = ::GetCurrentThreadId();
-}
-
-void Mutex::Unlock() {
-  ThreadSafeLazyInit();
-  // We don't protect writing to owner_thread_id_ here, as it's the
-  // caller's responsibility to ensure that the current thread holds the
-  // mutex when this is called.
-  owner_thread_id_ = 0;
-  ::LeaveCriticalSection(critical_section_);
-}
-
-// Does nothing if the current thread holds the mutex. Otherwise, crashes
-// with high probability.
-void Mutex::AssertHeld() {
-  ThreadSafeLazyInit();
-  GTEST_CHECK_(owner_thread_id_ == ::GetCurrentThreadId())
-      << "The current thread is not holding the mutex @" << this;
-}
-
-namespace {
-
-#ifdef _MSC_VER
-// Use the RAII idiom to flag mem allocs that are intentionally never
-// deallocated. The motivation is to silence the false positive mem leaks
-// that are reported by the debug version of MS's CRT which can only detect
-// if an alloc is missing a matching deallocation.
-// Example:
-//    MemoryIsNotDeallocated memory_is_not_deallocated;
-//    critical_section_ = new CRITICAL_SECTION;
-//
-class MemoryIsNotDeallocated
-{
- public:
-  MemoryIsNotDeallocated() : old_crtdbg_flag_(0) {
-    old_crtdbg_flag_ = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
-    // Set heap allocation block type to _IGNORE_BLOCK so that MS debug CRT
-    // doesn't report mem leak if there's no matching deallocation.
-    _CrtSetDbgFlag(old_crtdbg_flag_ & ~_CRTDBG_ALLOC_MEM_DF);
-  }
-
-  ~MemoryIsNotDeallocated() {
-    // Restore the original _CRTDBG_ALLOC_MEM_DF flag
-    _CrtSetDbgFlag(old_crtdbg_flag_);
-  }
-
- private:
-  int old_crtdbg_flag_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MemoryIsNotDeallocated);
-};
-#endif  // _MSC_VER
-
-}  // namespace
-
-// Initializes owner_thread_id_ and critical_section_ in static mutexes.
-void Mutex::ThreadSafeLazyInit() {
-  // Dynamic mutexes are initialized in the constructor.
-  if (type_ == kStatic) {
-    switch (
-        ::InterlockedCompareExchange(&critical_section_init_phase_, 1L, 0L)) {
-      case 0:
-        // If critical_section_init_phase_ was 0 before the exchange, we
-        // are the first to test it and need to perform the initialization.
-        owner_thread_id_ = 0;
-        {
-          // Use RAII to flag that following mem alloc is never deallocated.
-#ifdef _MSC_VER
-          MemoryIsNotDeallocated memory_is_not_deallocated;
-#endif  // _MSC_VER
-          critical_section_ = new CRITICAL_SECTION;
-        }
-        ::InitializeCriticalSection(critical_section_);
-        // Updates the critical_section_init_phase_ to 2 to signal
-        // initialization complete.
-        GTEST_CHECK_(::InterlockedCompareExchange(
-                          &critical_section_init_phase_, 2L, 1L) ==
-                      1L);
-        break;
-      case 1:
-        // Somebody else is already initializing the mutex; spin until they
-        // are done.
-        while (::InterlockedCompareExchange(&critical_section_init_phase_,
-                                            2L,
-                                            2L) != 2L) {
-          // Possibly yields the rest of the thread's time slice to other
-          // threads.
-          ::Sleep(0);
-        }
-        break;
-
-      case 2:
-        break;  // The mutex is already initialized and ready for use.
-
-      default:
-        GTEST_CHECK_(false)
-            << "Unexpected value of critical_section_init_phase_ "
-            << "while initializing a static mutex.";
-    }
-  }
-}
-
-namespace {
-
-class ThreadWithParamSupport : public ThreadWithParamBase {
- public:
-  static HANDLE CreateThread(Runnable* runnable,
-                             Notification* thread_can_start) {
-    ThreadMainParam* param = new ThreadMainParam(runnable, thread_can_start);
-    DWORD thread_id;
-    HANDLE thread_handle = ::CreateThread(
-        nullptr,  // Default security.
-        0,        // Default stack size.
-        &ThreadWithParamSupport::ThreadMain,
-        param,        // Parameter to ThreadMainStatic
-        0x0,          // Default creation flags.
-        &thread_id);  // Need a valid pointer for the call to work under Win98.
-    GTEST_CHECK_(thread_handle != nullptr)
-        << "CreateThread failed with error " << ::GetLastError() << ".";
-    if (thread_handle == nullptr) {
-      delete param;
-    }
-    return thread_handle;
-  }
-
- private:
-  struct ThreadMainParam {
-    ThreadMainParam(Runnable* runnable, Notification* thread_can_start)
-        : runnable_(runnable),
-          thread_can_start_(thread_can_start) {
-    }
-    std::unique_ptr<Runnable> runnable_;
-    // Does not own.
-    Notification* thread_can_start_;
-  };
-
-  static DWORD WINAPI ThreadMain(void* ptr) {
-    // Transfers ownership.
-    std::unique_ptr<ThreadMainParam> param(static_cast<ThreadMainParam*>(ptr));
-    if (param->thread_can_start_ != nullptr)
-      param->thread_can_start_->WaitForNotification();
-    param->runnable_->Run();
-    return 0;
-  }
-
-  // Prohibit instantiation.
-  ThreadWithParamSupport();
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParamSupport);
-};
-
-}  // namespace
-
-ThreadWithParamBase::ThreadWithParamBase(Runnable *runnable,
-                                         Notification* thread_can_start)
-      : thread_(ThreadWithParamSupport::CreateThread(runnable,
-                                                     thread_can_start)) {
-}
-
-ThreadWithParamBase::~ThreadWithParamBase() {
-  Join();
-}
-
-void ThreadWithParamBase::Join() {
-  GTEST_CHECK_(::WaitForSingleObject(thread_.Get(), INFINITE) == WAIT_OBJECT_0)
-      << "Failed to join the thread with error " << ::GetLastError() << ".";
-}
-
-// Maps a thread to a set of ThreadIdToThreadLocals that have values
-// instantiated on that thread and notifies them when the thread exits.  A
-// ThreadLocal instance is expected to persist until all threads it has
-// values on have terminated.
-class ThreadLocalRegistryImpl {
- public:
-  // Registers thread_local_instance as having value on the current thread.
-  // Returns a value that can be used to identify the thread from other threads.
-  static ThreadLocalValueHolderBase* GetValueOnCurrentThread(
-      const ThreadLocalBase* thread_local_instance) {
-    DWORD current_thread = ::GetCurrentThreadId();
-    MutexLock lock(&mutex_);
-    ThreadIdToThreadLocals* const thread_to_thread_locals =
-        GetThreadLocalsMapLocked();
-    ThreadIdToThreadLocals::iterator thread_local_pos =
-        thread_to_thread_locals->find(current_thread);
-    if (thread_local_pos == thread_to_thread_locals->end()) {
-      thread_local_pos = thread_to_thread_locals->insert(
-          std::make_pair(current_thread, ThreadLocalValues())).first;
-      StartWatcherThreadFor(current_thread);
-    }
-    ThreadLocalValues& thread_local_values = thread_local_pos->second;
-    ThreadLocalValues::iterator value_pos =
-        thread_local_values.find(thread_local_instance);
-    if (value_pos == thread_local_values.end()) {
-      value_pos =
-          thread_local_values
-              .insert(std::make_pair(
-                  thread_local_instance,
-                  std::shared_ptr<ThreadLocalValueHolderBase>(
-                      thread_local_instance->NewValueForCurrentThread())))
-              .first;
-    }
-    return value_pos->second.get();
-  }
-
-  static void OnThreadLocalDestroyed(
-      const ThreadLocalBase* thread_local_instance) {
-    std::vector<std::shared_ptr<ThreadLocalValueHolderBase> > value_holders;
-    // Clean up the ThreadLocalValues data structure while holding the lock, but
-    // defer the destruction of the ThreadLocalValueHolderBases.
-    {
-      MutexLock lock(&mutex_);
-      ThreadIdToThreadLocals* const thread_to_thread_locals =
-          GetThreadLocalsMapLocked();
-      for (ThreadIdToThreadLocals::iterator it =
-          thread_to_thread_locals->begin();
-          it != thread_to_thread_locals->end();
-          ++it) {
-        ThreadLocalValues& thread_local_values = it->second;
-        ThreadLocalValues::iterator value_pos =
-            thread_local_values.find(thread_local_instance);
-        if (value_pos != thread_local_values.end()) {
-          value_holders.push_back(value_pos->second);
-          thread_local_values.erase(value_pos);
-          // This 'if' can only be successful at most once, so theoretically we
-          // could break out of the loop here, but we don't bother doing so.
-        }
-      }
-    }
-    // Outside the lock, let the destructor for 'value_holders' deallocate the
-    // ThreadLocalValueHolderBases.
-  }
-
-  static void OnThreadExit(DWORD thread_id) {
-    GTEST_CHECK_(thread_id != 0) << ::GetLastError();
-    std::vector<std::shared_ptr<ThreadLocalValueHolderBase> > value_holders;
-    // Clean up the ThreadIdToThreadLocals data structure while holding the
-    // lock, but defer the destruction of the ThreadLocalValueHolderBases.
-    {
-      MutexLock lock(&mutex_);
-      ThreadIdToThreadLocals* const thread_to_thread_locals =
-          GetThreadLocalsMapLocked();
-      ThreadIdToThreadLocals::iterator thread_local_pos =
-          thread_to_thread_locals->find(thread_id);
-      if (thread_local_pos != thread_to_thread_locals->end()) {
-        ThreadLocalValues& thread_local_values = thread_local_pos->second;
-        for (ThreadLocalValues::iterator value_pos =
-            thread_local_values.begin();
-            value_pos != thread_local_values.end();
-            ++value_pos) {
-          value_holders.push_back(value_pos->second);
-        }
-        thread_to_thread_locals->erase(thread_local_pos);
-      }
-    }
-    // Outside the lock, let the destructor for 'value_holders' deallocate the
-    // ThreadLocalValueHolderBases.
-  }
-
- private:
-  // In a particular thread, maps a ThreadLocal object to its value.
-  typedef std::map<const ThreadLocalBase*,
-                   std::shared_ptr<ThreadLocalValueHolderBase> >
-      ThreadLocalValues;
-  // Stores all ThreadIdToThreadLocals having values in a thread, indexed by
-  // thread's ID.
-  typedef std::map<DWORD, ThreadLocalValues> ThreadIdToThreadLocals;
-
-  // Holds the thread id and thread handle that we pass from
-  // StartWatcherThreadFor to WatcherThreadFunc.
-  typedef std::pair<DWORD, HANDLE> ThreadIdAndHandle;
-
-  static void StartWatcherThreadFor(DWORD thread_id) {
-    // The returned handle will be kept in thread_map and closed by
-    // watcher_thread in WatcherThreadFunc.
-    HANDLE thread = ::OpenThread(SYNCHRONIZE | THREAD_QUERY_INFORMATION,
-                                 FALSE,
-                                 thread_id);
-    GTEST_CHECK_(thread != nullptr);
-    // We need to pass a valid thread ID pointer into CreateThread for it
-    // to work correctly under Win98.
-    DWORD watcher_thread_id;
-    HANDLE watcher_thread = ::CreateThread(
-        nullptr,  // Default security.
-        0,        // Default stack size
-        &ThreadLocalRegistryImpl::WatcherThreadFunc,
-        reinterpret_cast<LPVOID>(new ThreadIdAndHandle(thread_id, thread)),
-        CREATE_SUSPENDED, &watcher_thread_id);
-    GTEST_CHECK_(watcher_thread != nullptr);
-    // Give the watcher thread the same priority as ours to avoid being
-    // blocked by it.
-    ::SetThreadPriority(watcher_thread,
-                        ::GetThreadPriority(::GetCurrentThread()));
-    ::ResumeThread(watcher_thread);
-    ::CloseHandle(watcher_thread);
-  }
-
-  // Monitors exit from a given thread and notifies those
-  // ThreadIdToThreadLocals about thread termination.
-  static DWORD WINAPI WatcherThreadFunc(LPVOID param) {
-    const ThreadIdAndHandle* tah =
-        reinterpret_cast<const ThreadIdAndHandle*>(param);
-    GTEST_CHECK_(
-        ::WaitForSingleObject(tah->second, INFINITE) == WAIT_OBJECT_0);
-    OnThreadExit(tah->first);
-    ::CloseHandle(tah->second);
-    delete tah;
-    return 0;
-  }
-
-  // Returns map of thread local instances.
-  static ThreadIdToThreadLocals* GetThreadLocalsMapLocked() {
-    mutex_.AssertHeld();
-#ifdef _MSC_VER
-    MemoryIsNotDeallocated memory_is_not_deallocated;
-#endif  // _MSC_VER
-    static ThreadIdToThreadLocals* map = new ThreadIdToThreadLocals();
-    return map;
-  }
-
-  // Protects access to GetThreadLocalsMapLocked() and its return value.
-  static Mutex mutex_;
-  // Protects access to GetThreadMapLocked() and its return value.
-  static Mutex thread_map_mutex_;
-};
-
-Mutex ThreadLocalRegistryImpl::mutex_(Mutex::kStaticMutex);
-Mutex ThreadLocalRegistryImpl::thread_map_mutex_(Mutex::kStaticMutex);
-
-ThreadLocalValueHolderBase* ThreadLocalRegistry::GetValueOnCurrentThread(
-      const ThreadLocalBase* thread_local_instance) {
-  return ThreadLocalRegistryImpl::GetValueOnCurrentThread(
-      thread_local_instance);
-}
-
-void ThreadLocalRegistry::OnThreadLocalDestroyed(
-      const ThreadLocalBase* thread_local_instance) {
-  ThreadLocalRegistryImpl::OnThreadLocalDestroyed(thread_local_instance);
-}
-
-#endif  // GTEST_IS_THREADSAFE && GTEST_OS_WINDOWS
-
-#if GTEST_USES_POSIX_RE
-
-// Implements RE.  Currently only needed for death tests.
-
-RE::~RE() {
-  if (is_valid_) {
-    // regfree'ing an invalid regex might crash because the content
-    // of the regex is undefined. Since the regex's are essentially
-    // the same, one cannot be valid (or invalid) without the other
-    // being so too.
-    regfree(&partial_regex_);
-    regfree(&full_regex_);
-  }
-  free(const_cast<char*>(pattern_));
-}
-
-// Returns true if and only if regular expression re matches the entire str.
-bool RE::FullMatch(const char* str, const RE& re) {
-  if (!re.is_valid_) return false;
-
-  regmatch_t match;
-  return regexec(&re.full_regex_, str, 1, &match, 0) == 0;
-}
-
-// Returns true if and only if regular expression re matches a substring of
-// str (including str itself).
-bool RE::PartialMatch(const char* str, const RE& re) {
-  if (!re.is_valid_) return false;
-
-  regmatch_t match;
-  return regexec(&re.partial_regex_, str, 1, &match, 0) == 0;
-}
-
-// Initializes an RE from its string representation.
-void RE::Init(const char* regex) {
-  pattern_ = posix::StrDup(regex);
-
-  // Reserves enough bytes to hold the regular expression used for a
-  // full match.
-  const size_t full_regex_len = strlen(regex) + 10;
-  char* const full_pattern = new char[full_regex_len];
-
-  snprintf(full_pattern, full_regex_len, "^(%s)$", regex);
-  is_valid_ = regcomp(&full_regex_, full_pattern, REG_EXTENDED) == 0;
-  // We want to call regcomp(&partial_regex_, ...) even if the
-  // previous expression returns false.  Otherwise partial_regex_ may
-  // not be properly initialized can may cause trouble when it's
-  // freed.
-  //
-  // Some implementation of POSIX regex (e.g. on at least some
-  // versions of Cygwin) doesn't accept the empty string as a valid
-  // regex.  We change it to an equivalent form "()" to be safe.
-  if (is_valid_) {
-    const char* const partial_regex = (*regex == '\0') ? "()" : regex;
-    is_valid_ = regcomp(&partial_regex_, partial_regex, REG_EXTENDED) == 0;
-  }
-  EXPECT_TRUE(is_valid_)
-      << "Regular expression \"" << regex
-      << "\" is not a valid POSIX Extended regular expression.";
-
-  delete[] full_pattern;
-}
-
-#elif GTEST_USES_SIMPLE_RE
-
-// Returns true if and only if ch appears anywhere in str (excluding the
-// terminating '\0' character).
-bool IsInSet(char ch, const char* str) {
-  return ch != '\0' && strchr(str, ch) != nullptr;
-}
-
-// Returns true if and only if ch belongs to the given classification.
-// Unlike similar functions in <ctype.h>, these aren't affected by the
-// current locale.
-bool IsAsciiDigit(char ch) { return '0' <= ch && ch <= '9'; }
-bool IsAsciiPunct(char ch) {
-  return IsInSet(ch, "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~");
-}
-bool IsRepeat(char ch) { return IsInSet(ch, "?*+"); }
-bool IsAsciiWhiteSpace(char ch) { return IsInSet(ch, " \f\n\r\t\v"); }
-bool IsAsciiWordChar(char ch) {
-  return ('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z') ||
-      ('0' <= ch && ch <= '9') || ch == '_';
-}
-
-// Returns true if and only if "\\c" is a supported escape sequence.
-bool IsValidEscape(char c) {
-  return (IsAsciiPunct(c) || IsInSet(c, "dDfnrsStvwW"));
-}
-
-// Returns true if and only if the given atom (specified by escaped and
-// pattern) matches ch.  The result is undefined if the atom is invalid.
-bool AtomMatchesChar(bool escaped, char pattern_char, char ch) {
-  if (escaped) {  // "\\p" where p is pattern_char.
-    switch (pattern_char) {
-      case 'd': return IsAsciiDigit(ch);
-      case 'D': return !IsAsciiDigit(ch);
-      case 'f': return ch == '\f';
-      case 'n': return ch == '\n';
-      case 'r': return ch == '\r';
-      case 's': return IsAsciiWhiteSpace(ch);
-      case 'S': return !IsAsciiWhiteSpace(ch);
-      case 't': return ch == '\t';
-      case 'v': return ch == '\v';
-      case 'w': return IsAsciiWordChar(ch);
-      case 'W': return !IsAsciiWordChar(ch);
-    }
-    return IsAsciiPunct(pattern_char) && pattern_char == ch;
-  }
-
-  return (pattern_char == '.' && ch != '\n') || pattern_char == ch;
-}
-
-// Helper function used by ValidateRegex() to format error messages.
-static std::string FormatRegexSyntaxError(const char* regex, int index) {
-  return (Message() << "Syntax error at index " << index
-          << " in simple regular expression \"" << regex << "\": ").GetString();
-}
-
-// Generates non-fatal failures and returns false if regex is invalid;
-// otherwise returns true.
-bool ValidateRegex(const char* regex) {
-  if (regex == nullptr) {
-    ADD_FAILURE() << "NULL is not a valid simple regular expression.";
-    return false;
-  }
-
-  bool is_valid = true;
-
-  // True if and only if ?, *, or + can follow the previous atom.
-  bool prev_repeatable = false;
-  for (int i = 0; regex[i]; i++) {
-    if (regex[i] == '\\') {  // An escape sequence
-      i++;
-      if (regex[i] == '\0') {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
-                      << "'\\' cannot appear at the end.";
-        return false;
-      }
-
-      if (!IsValidEscape(regex[i])) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
-                      << "invalid escape sequence \"\\" << regex[i] << "\".";
-        is_valid = false;
-      }
-      prev_repeatable = true;
-    } else {  // Not an escape sequence.
-      const char ch = regex[i];
-
-      if (ch == '^' && i > 0) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'^' can only appear at the beginning.";
-        is_valid = false;
-      } else if (ch == '$' && regex[i + 1] != '\0') {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'$' can only appear at the end.";
-        is_valid = false;
-      } else if (IsInSet(ch, "()[]{}|")) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'" << ch << "' is unsupported.";
-        is_valid = false;
-      } else if (IsRepeat(ch) && !prev_repeatable) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'" << ch << "' can only follow a repeatable token.";
-        is_valid = false;
-      }
-
-      prev_repeatable = !IsInSet(ch, "^$?*+");
-    }
-  }
-
-  return is_valid;
-}
-
-// Matches a repeated regex atom followed by a valid simple regular
-// expression.  The regex atom is defined as c if escaped is false,
-// or \c otherwise.  repeat is the repetition meta character (?, *,
-// or +).  The behavior is undefined if str contains too many
-// characters to be indexable by size_t, in which case the test will
-// probably time out anyway.  We are fine with this limitation as
-// std::string has it too.
-bool MatchRepetitionAndRegexAtHead(
-    bool escaped, char c, char repeat, const char* regex,
-    const char* str) {
-  const size_t min_count = (repeat == '+') ? 1 : 0;
-  const size_t max_count = (repeat == '?') ? 1 :
-      static_cast<size_t>(-1) - 1;
-  // We cannot call numeric_limits::max() as it conflicts with the
-  // max() macro on Windows.
-
-  for (size_t i = 0; i <= max_count; ++i) {
-    // We know that the atom matches each of the first i characters in str.
-    if (i >= min_count && MatchRegexAtHead(regex, str + i)) {
-      // We have enough matches at the head, and the tail matches too.
-      // Since we only care about *whether* the pattern matches str
-      // (as opposed to *how* it matches), there is no need to find a
-      // greedy match.
-      return true;
-    }
-    if (str[i] == '\0' || !AtomMatchesChar(escaped, c, str[i]))
-      return false;
-  }
-  return false;
-}
-
-// Returns true if and only if regex matches a prefix of str. regex must
-// be a valid simple regular expression and not start with "^", or the
-// result is undefined.
-bool MatchRegexAtHead(const char* regex, const char* str) {
-  if (*regex == '\0')  // An empty regex matches a prefix of anything.
-    return true;
-
-  // "$" only matches the end of a string.  Note that regex being
-  // valid guarantees that there's nothing after "$" in it.
-  if (*regex == '$')
-    return *str == '\0';
-
-  // Is the first thing in regex an escape sequence?
-  const bool escaped = *regex == '\\';
-  if (escaped)
-    ++regex;
-  if (IsRepeat(regex[1])) {
-    // MatchRepetitionAndRegexAtHead() calls MatchRegexAtHead(), so
-    // here's an indirect recursion.  It terminates as the regex gets
-    // shorter in each recursion.
-    return MatchRepetitionAndRegexAtHead(
-        escaped, regex[0], regex[1], regex + 2, str);
-  } else {
-    // regex isn't empty, isn't "$", and doesn't start with a
-    // repetition.  We match the first atom of regex with the first
-    // character of str and recurse.
-    return (*str != '\0') && AtomMatchesChar(escaped, *regex, *str) &&
-        MatchRegexAtHead(regex + 1, str + 1);
-  }
-}
-
-// Returns true if and only if regex matches any substring of str.  regex must
-// be a valid simple regular expression, or the result is undefined.
-//
-// The algorithm is recursive, but the recursion depth doesn't exceed
-// the regex length, so we won't need to worry about running out of
-// stack space normally.  In rare cases the time complexity can be
-// exponential with respect to the regex length + the string length,
-// but usually it's must faster (often close to linear).
-bool MatchRegexAnywhere(const char* regex, const char* str) {
-  if (regex == nullptr || str == nullptr) return false;
-
-  if (*regex == '^')
-    return MatchRegexAtHead(regex + 1, str);
-
-  // A successful match can be anywhere in str.
-  do {
-    if (MatchRegexAtHead(regex, str))
-      return true;
-  } while (*str++ != '\0');
-  return false;
-}
-
-// Implements the RE class.
-
-RE::~RE() {
-  free(const_cast<char*>(pattern_));
-  free(const_cast<char*>(full_pattern_));
-}
-
-// Returns true if and only if regular expression re matches the entire str.
-bool RE::FullMatch(const char* str, const RE& re) {
-  return re.is_valid_ && MatchRegexAnywhere(re.full_pattern_, str);
-}
-
-// Returns true if and only if regular expression re matches a substring of
-// str (including str itself).
-bool RE::PartialMatch(const char* str, const RE& re) {
-  return re.is_valid_ && MatchRegexAnywhere(re.pattern_, str);
-}
-
-// Initializes an RE from its string representation.
-void RE::Init(const char* regex) {
-  pattern_ = full_pattern_ = nullptr;
-  if (regex != nullptr) {
-    pattern_ = posix::StrDup(regex);
-  }
-
-  is_valid_ = ValidateRegex(regex);
-  if (!is_valid_) {
-    // No need to calculate the full pattern when the regex is invalid.
-    return;
-  }
-
-  const size_t len = strlen(regex);
-  // Reserves enough bytes to hold the regular expression used for a
-  // full match: we need space to prepend a '^', append a '$', and
-  // terminate the string with '\0'.
-  char* buffer = static_cast<char*>(malloc(len + 3));
-  full_pattern_ = buffer;
-
-  if (*regex != '^')
-    *buffer++ = '^';  // Makes sure full_pattern_ starts with '^'.
-
-  // We don't use snprintf or strncpy, as they trigger a warning when
-  // compiled with VC++ 8.0.
-  memcpy(buffer, regex, len);
-  buffer += len;
-
-  if (len == 0 || regex[len - 1] != '$')
-    *buffer++ = '$';  // Makes sure full_pattern_ ends with '$'.
-
-  *buffer = '\0';
-}
-
-#endif  // GTEST_USES_POSIX_RE
-
-const char kUnknownFile[] = "unknown file";
-
-// Formats a source file path and a line number as they would appear
-// in an error message from the compiler used to compile this code.
-GTEST_API_ ::std::string FormatFileLocation(const char* file, int line) {
-  const std::string file_name(file == nullptr ? kUnknownFile : file);
-
-  if (line < 0) {
-    return file_name + ":";
-  }
-#ifdef _MSC_VER
-  return file_name + "(" + StreamableToString(line) + "):";
-#else
-  return file_name + ":" + StreamableToString(line) + ":";
-#endif  // _MSC_VER
-}
-
-// Formats a file location for compiler-independent XML output.
-// Although this function is not platform dependent, we put it next to
-// FormatFileLocation in order to contrast the two functions.
-// Note that FormatCompilerIndependentFileLocation() does NOT append colon
-// to the file location it produces, unlike FormatFileLocation().
-GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(
-    const char* file, int line) {
-  const std::string file_name(file == nullptr ? kUnknownFile : file);
-
-  if (line < 0)
-    return file_name;
-  else
-    return file_name + ":" + StreamableToString(line);
-}
-
-GTestLog::GTestLog(GTestLogSeverity severity, const char* file, int line)
-    : severity_(severity) {
-  const char* const marker =
-      severity == GTEST_INFO ?    "[  INFO ]" :
-      severity == GTEST_WARNING ? "[WARNING]" :
-      severity == GTEST_ERROR ?   "[ ERROR ]" : "[ FATAL ]";
-  GetStream() << ::std::endl << marker << " "
-              << FormatFileLocation(file, line).c_str() << ": ";
-}
-
-// Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
-GTestLog::~GTestLog() {
-  GetStream() << ::std::endl;
-  if (severity_ == GTEST_FATAL) {
-    fflush(stderr);
-    posix::Abort();
-  }
-}
-
-// Disable Microsoft deprecation warnings for POSIX functions called from
-// this class (creat, dup, dup2, and close)
-GTEST_DISABLE_MSC_DEPRECATED_PUSH_()
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Object that captures an output stream (stdout/stderr).
-class CapturedStream {
- public:
-  // The ctor redirects the stream to a temporary file.
-  explicit CapturedStream(int fd) : fd_(fd), uncaptured_fd_(dup(fd)) {
-# if GTEST_OS_WINDOWS
-    char temp_dir_path[MAX_PATH + 1] = { '\0' };  // NOLINT
-    char temp_file_path[MAX_PATH + 1] = { '\0' };  // NOLINT
-
-    ::GetTempPathA(sizeof(temp_dir_path), temp_dir_path);
-    const UINT success = ::GetTempFileNameA(temp_dir_path,
-                                            "gtest_redir",
-                                            0,  // Generate unique file name.
-                                            temp_file_path);
-    GTEST_CHECK_(success != 0)
-        << "Unable to create a temporary file in " << temp_dir_path;
-    const int captured_fd = creat(temp_file_path, _S_IREAD | _S_IWRITE);
-    GTEST_CHECK_(captured_fd != -1) << "Unable to open temporary file "
-                                    << temp_file_path;
-    filename_ = temp_file_path;
-# else
-    // There's no guarantee that a test has write access to the current
-    // directory, so we create the temporary file in the /tmp directory
-    // instead. We use /tmp on most systems, and /sdcard on Android.
-    // That's because Android doesn't have /tmp.
-#  if GTEST_OS_LINUX_ANDROID
-    // Note: Android applications are expected to call the framework's
-    // Context.getExternalStorageDirectory() method through JNI to get
-    // the location of the world-writable SD Card directory. However,
-    // this requires a Context handle, which cannot be retrieved
-    // globally from native code. Doing so also precludes running the
-    // code as part of a regular standalone executable, which doesn't
-    // run in a Dalvik process (e.g. when running it through 'adb shell').
-    //
-    // The location /data/local/tmp is directly accessible from native code.
-    // '/sdcard' and other variants cannot be relied on, as they are not
-    // guaranteed to be mounted, or may have a delay in mounting.
-    char name_template[] = "/data/local/tmp/gtest_captured_stream.XXXXXX";
-#  else
-    char name_template[] = "/tmp/captured_stream.XXXXXX";
-#  endif  // GTEST_OS_LINUX_ANDROID
-    const int captured_fd = mkstemp(name_template);
-    if (captured_fd == -1) {
-      GTEST_LOG_(WARNING)
-          << "Failed to create tmp file " << name_template
-          << " for test; does the test have access to the /tmp directory?";
-    }
-    filename_ = name_template;
-# endif  // GTEST_OS_WINDOWS
-    fflush(nullptr);
-    dup2(captured_fd, fd_);
-    close(captured_fd);
-  }
-
-  ~CapturedStream() {
-    remove(filename_.c_str());
-  }
-
-  std::string GetCapturedString() {
-    if (uncaptured_fd_ != -1) {
-      // Restores the original stream.
-      fflush(nullptr);
-      dup2(uncaptured_fd_, fd_);
-      close(uncaptured_fd_);
-      uncaptured_fd_ = -1;
-    }
-
-    FILE* const file = posix::FOpen(filename_.c_str(), "r");
-    if (file == nullptr) {
-      GTEST_LOG_(FATAL) << "Failed to open tmp file " << filename_
-                        << " for capturing stream.";
-    }
-    const std::string content = ReadEntireFile(file);
-    posix::FClose(file);
-    return content;
-  }
-
- private:
-  const int fd_;  // A stream to capture.
-  int uncaptured_fd_;
-  // Name of the temporary file holding the stderr output.
-  ::std::string filename_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(CapturedStream);
-};
-
-GTEST_DISABLE_MSC_DEPRECATED_POP_()
-
-static CapturedStream* g_captured_stderr = nullptr;
-static CapturedStream* g_captured_stdout = nullptr;
-
-// Starts capturing an output stream (stdout/stderr).
-static void CaptureStream(int fd, const char* stream_name,
-                          CapturedStream** stream) {
-  if (*stream != nullptr) {
-    GTEST_LOG_(FATAL) << "Only one " << stream_name
-                      << " capturer can exist at a time.";
-  }
-  *stream = new CapturedStream(fd);
-}
-
-// Stops capturing the output stream and returns the captured string.
-static std::string GetCapturedStream(CapturedStream** captured_stream) {
-  const std::string content = (*captured_stream)->GetCapturedString();
-
-  delete *captured_stream;
-  *captured_stream = nullptr;
-
-  return content;
-}
-
-// Starts capturing stdout.
-void CaptureStdout() {
-  CaptureStream(kStdOutFileno, "stdout", &g_captured_stdout);
-}
-
-// Starts capturing stderr.
-void CaptureStderr() {
-  CaptureStream(kStdErrFileno, "stderr", &g_captured_stderr);
-}
-
-// Stops capturing stdout and returns the captured string.
-std::string GetCapturedStdout() {
-  return GetCapturedStream(&g_captured_stdout);
-}
-
-// Stops capturing stderr and returns the captured string.
-std::string GetCapturedStderr() {
-  return GetCapturedStream(&g_captured_stderr);
-}
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-
-
-
-
-size_t GetFileSize(FILE* file) {
-  fseek(file, 0, SEEK_END);
-  return static_cast<size_t>(ftell(file));
-}
-
-std::string ReadEntireFile(FILE* file) {
-  const size_t file_size = GetFileSize(file);
-  char* const buffer = new char[file_size];
-
-  size_t bytes_last_read = 0;  // # of bytes read in the last fread()
-  size_t bytes_read = 0;       // # of bytes read so far
-
-  fseek(file, 0, SEEK_SET);
-
-  // Keeps reading the file until we cannot read further or the
-  // pre-determined file size is reached.
-  do {
-    bytes_last_read = fread(buffer+bytes_read, 1, file_size-bytes_read, file);
-    bytes_read += bytes_last_read;
-  } while (bytes_last_read > 0 && bytes_read < file_size);
-
-  const std::string content(buffer, bytes_read);
-  delete[] buffer;
-
-  return content;
-}
-
-#if GTEST_HAS_DEATH_TEST
-static const std::vector<std::string>* g_injected_test_argvs =
-    nullptr;  // Owned.
-
-std::vector<std::string> GetInjectableArgvs() {
-  if (g_injected_test_argvs != nullptr) {
-    return *g_injected_test_argvs;
-  }
-  return GetArgvs();
-}
-
-void SetInjectableArgvs(const std::vector<std::string>* new_argvs) {
-  if (g_injected_test_argvs != new_argvs) delete g_injected_test_argvs;
-  g_injected_test_argvs = new_argvs;
-}
-
-void SetInjectableArgvs(const std::vector<std::string>& new_argvs) {
-  SetInjectableArgvs(
-      new std::vector<std::string>(new_argvs.begin(), new_argvs.end()));
-}
-
-void ClearInjectableArgvs() {
-  delete g_injected_test_argvs;
-  g_injected_test_argvs = nullptr;
-}
-#endif  // GTEST_HAS_DEATH_TEST
-
-#if GTEST_OS_WINDOWS_MOBILE
-namespace posix {
-void Abort() {
-  DebugBreak();
-  TerminateProcess(GetCurrentProcess(), 1);
-}
-}  // namespace posix
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-// Returns the name of the environment variable corresponding to the
-// given flag.  For example, FlagToEnvVar("foo") will return
-// "GTEST_FOO" in the open-source version.
-static std::string FlagToEnvVar(const char* flag) {
-  const std::string full_flag =
-      (Message() << GTEST_FLAG_PREFIX_ << flag).GetString();
-
-  Message env_var;
-  for (size_t i = 0; i != full_flag.length(); i++) {
-    env_var << ToUpper(full_flag.c_str()[i]);
-  }
-
-  return env_var.GetString();
-}
-
-// Parses 'str' for a 32-bit signed integer.  If successful, writes
-// the result to *value and returns true; otherwise leaves *value
-// unchanged and returns false.
-bool ParseInt32(const Message& src_text, const char* str, Int32* value) {
-  // Parses the environment variable as a decimal integer.
-  char* end = nullptr;
-  const long long_value = strtol(str, &end, 10);  // NOLINT
-
-  // Has strtol() consumed all characters in the string?
-  if (*end != '\0') {
-    // No - an invalid character was encountered.
-    Message msg;
-    msg << "WARNING: " << src_text
-        << " is expected to be a 32-bit integer, but actually"
-        << " has value \"" << str << "\".\n";
-    printf("%s", msg.GetString().c_str());
-    fflush(stdout);
-    return false;
-  }
-
-  // Is the parsed value in the range of an Int32?
-  const Int32 result = static_cast<Int32>(long_value);
-  if (long_value == LONG_MAX || long_value == LONG_MIN ||
-      // The parsed value overflows as a long.  (strtol() returns
-      // LONG_MAX or LONG_MIN when the input overflows.)
-      result != long_value
-      // The parsed value overflows as an Int32.
-      ) {
-    Message msg;
-    msg << "WARNING: " << src_text
-        << " is expected to be a 32-bit integer, but actually"
-        << " has value " << str << ", which overflows.\n";
-    printf("%s", msg.GetString().c_str());
-    fflush(stdout);
-    return false;
-  }
-
-  *value = result;
-  return true;
-}
-
-// Reads and returns the Boolean environment variable corresponding to
-// the given flag; if it's not set, returns default_value.
-//
-// The value is considered true if and only if it's not "0".
-bool BoolFromGTestEnv(const char* flag, bool default_value) {
-#if defined(GTEST_GET_BOOL_FROM_ENV_)
-  return GTEST_GET_BOOL_FROM_ENV_(flag, default_value);
-#else
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const string_value = posix::GetEnv(env_var.c_str());
-  return string_value == nullptr ? default_value
-                                 : strcmp(string_value, "0") != 0;
-#endif  // defined(GTEST_GET_BOOL_FROM_ENV_)
-}
-
-// Reads and returns a 32-bit integer stored in the environment
-// variable corresponding to the given flag; if it isn't set or
-// doesn't represent a valid 32-bit integer, returns default_value.
-Int32 Int32FromGTestEnv(const char* flag, Int32 default_value) {
-#if defined(GTEST_GET_INT32_FROM_ENV_)
-  return GTEST_GET_INT32_FROM_ENV_(flag, default_value);
-#else
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const string_value = posix::GetEnv(env_var.c_str());
-  if (string_value == nullptr) {
-    // The environment variable is not set.
-    return default_value;
-  }
-
-  Int32 result = default_value;
-  if (!ParseInt32(Message() << "Environment variable " << env_var,
-                  string_value, &result)) {
-    printf("The default value %s is used.\n",
-           (Message() << default_value).GetString().c_str());
-    fflush(stdout);
-    return default_value;
-  }
-
-  return result;
-#endif  // defined(GTEST_GET_INT32_FROM_ENV_)
-}
-
-// As a special case for the 'output' flag, if GTEST_OUTPUT is not
-// set, we look for XML_OUTPUT_FILE, which is set by the Bazel build
-// system.  The value of XML_OUTPUT_FILE is a filename without the
-// "xml:" prefix of GTEST_OUTPUT.
-// Note that this is meant to be called at the call site so it does
-// not check that the flag is 'output'
-// In essence this checks an env variable called XML_OUTPUT_FILE
-// and if it is set we prepend "xml:" to its value, if it not set we return ""
-std::string OutputFlagAlsoCheckEnvVar(){
-  std::string default_value_for_output_flag = "";
-  const char* xml_output_file_env = posix::GetEnv("XML_OUTPUT_FILE");
-  if (nullptr != xml_output_file_env) {
-    default_value_for_output_flag = std::string("xml:") + xml_output_file_env;
-  }
-  return default_value_for_output_flag;
-}
-
-// Reads and returns the string environment variable corresponding to
-// the given flag; if it's not set, returns default_value.
-const char* StringFromGTestEnv(const char* flag, const char* default_value) {
-#if defined(GTEST_GET_STRING_FROM_ENV_)
-  return GTEST_GET_STRING_FROM_ENV_(flag, default_value);
-#else
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const value = posix::GetEnv(env_var.c_str());
-  return value == nullptr ? default_value : value;
-#endif  // defined(GTEST_GET_STRING_FROM_ENV_)
-}
-
-}  // namespace internal
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest-printers.cc b/3rdparty/gtest/src/gtest-printers.cc
deleted file mode 100644
index 3337be31..00000000
--- a/3rdparty/gtest/src/gtest-printers.cc
+++ /dev/null
@@ -1,442 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Test - The Google C++ Testing and Mocking Framework
-//
-// This file implements a universal value printer that can print a
-// value of any type T:
-//
-//   void ::testing::internal::UniversalPrinter<T>::Print(value, ostream_ptr);
-//
-// It uses the << operator when possible, and prints the bytes in the
-// object otherwise.  A user can override its behavior for a class
-// type Foo by defining either operator<<(::std::ostream&, const Foo&)
-// or void PrintTo(const Foo&, ::std::ostream*) in the namespace that
-// defines Foo.
-
-#include "gtest/gtest-printers.h"
-#include <stdio.h>
-#include <cctype>
-#include <cwchar>
-#include <ostream>  // NOLINT
-#include <string>
-#include "gtest/internal/gtest-port.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-
-namespace {
-
-using ::std::ostream;
-
-// Prints a segment of bytes in the given object.
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-void PrintByteSegmentInObjectTo(const unsigned char* obj_bytes, size_t start,
-                                size_t count, ostream* os) {
-  char text[5] = "";
-  for (size_t i = 0; i != count; i++) {
-    const size_t j = start + i;
-    if (i != 0) {
-      // Organizes the bytes into groups of 2 for easy parsing by
-      // human.
-      if ((j % 2) == 0)
-        *os << ' ';
-      else
-        *os << '-';
-    }
-    GTEST_SNPRINTF_(text, sizeof(text), "%02X", obj_bytes[j]);
-    *os << text;
-  }
-}
-
-// Prints the bytes in the given value to the given ostream.
-void PrintBytesInObjectToImpl(const unsigned char* obj_bytes, size_t count,
-                              ostream* os) {
-  // Tells the user how big the object is.
-  *os << count << "-byte object <";
-
-  const size_t kThreshold = 132;
-  const size_t kChunkSize = 64;
-  // If the object size is bigger than kThreshold, we'll have to omit
-  // some details by printing only the first and the last kChunkSize
-  // bytes.
-  if (count < kThreshold) {
-    PrintByteSegmentInObjectTo(obj_bytes, 0, count, os);
-  } else {
-    PrintByteSegmentInObjectTo(obj_bytes, 0, kChunkSize, os);
-    *os << " ... ";
-    // Rounds up to 2-byte boundary.
-    const size_t resume_pos = (count - kChunkSize + 1)/2*2;
-    PrintByteSegmentInObjectTo(obj_bytes, resume_pos, count - resume_pos, os);
-  }
-  *os << ">";
-}
-
-}  // namespace
-
-namespace internal2 {
-
-// Delegates to PrintBytesInObjectToImpl() to print the bytes in the
-// given object.  The delegation simplifies the implementation, which
-// uses the << operator and thus is easier done outside of the
-// ::testing::internal namespace, which contains a << operator that
-// sometimes conflicts with the one in STL.
-void PrintBytesInObjectTo(const unsigned char* obj_bytes, size_t count,
-                          ostream* os) {
-  PrintBytesInObjectToImpl(obj_bytes, count, os);
-}
-
-}  // namespace internal2
-
-namespace internal {
-
-// Depending on the value of a char (or wchar_t), we print it in one
-// of three formats:
-//   - as is if it's a printable ASCII (e.g. 'a', '2', ' '),
-//   - as a hexadecimal escape sequence (e.g. '\x7F'), or
-//   - as a special escape sequence (e.g. '\r', '\n').
-enum CharFormat {
-  kAsIs,
-  kHexEscape,
-  kSpecialEscape
-};
-
-// Returns true if c is a printable ASCII character.  We test the
-// value of c directly instead of calling isprint(), which is buggy on
-// Windows Mobile.
-inline bool IsPrintableAscii(wchar_t c) {
-  return 0x20 <= c && c <= 0x7E;
-}
-
-// Prints a wide or narrow char c as a character literal without the
-// quotes, escaping it when necessary; returns how c was formatted.
-// The template argument UnsignedChar is the unsigned version of Char,
-// which is the type of c.
-template <typename UnsignedChar, typename Char>
-static CharFormat PrintAsCharLiteralTo(Char c, ostream* os) {
-  wchar_t w_c = static_cast<wchar_t>(c);
-  switch (w_c) {
-    case L'\0':
-      *os << "\\0";
-      break;
-    case L'\'':
-      *os << "\\'";
-      break;
-    case L'\\':
-      *os << "\\\\";
-      break;
-    case L'\a':
-      *os << "\\a";
-      break;
-    case L'\b':
-      *os << "\\b";
-      break;
-    case L'\f':
-      *os << "\\f";
-      break;
-    case L'\n':
-      *os << "\\n";
-      break;
-    case L'\r':
-      *os << "\\r";
-      break;
-    case L'\t':
-      *os << "\\t";
-      break;
-    case L'\v':
-      *os << "\\v";
-      break;
-    default:
-      if (IsPrintableAscii(w_c)) {
-        *os << static_cast<char>(c);
-        return kAsIs;
-      } else {
-        ostream::fmtflags flags = os->flags();
-        *os << "\\x" << std::hex << std::uppercase
-            << static_cast<int>(static_cast<UnsignedChar>(c));
-        os->flags(flags);
-        return kHexEscape;
-      }
-  }
-  return kSpecialEscape;
-}
-
-// Prints a wchar_t c as if it's part of a string literal, escaping it when
-// necessary; returns how c was formatted.
-static CharFormat PrintAsStringLiteralTo(wchar_t c, ostream* os) {
-  switch (c) {
-    case L'\'':
-      *os << "'";
-      return kAsIs;
-    case L'"':
-      *os << "\\\"";
-      return kSpecialEscape;
-    default:
-      return PrintAsCharLiteralTo<wchar_t>(c, os);
-  }
-}
-
-// Prints a char c as if it's part of a string literal, escaping it when
-// necessary; returns how c was formatted.
-static CharFormat PrintAsStringLiteralTo(char c, ostream* os) {
-  return PrintAsStringLiteralTo(
-      static_cast<wchar_t>(static_cast<unsigned char>(c)), os);
-}
-
-// Prints a wide or narrow character c and its code.  '\0' is printed
-// as "'\\0'", other unprintable characters are also properly escaped
-// using the standard C++ escape sequence.  The template argument
-// UnsignedChar is the unsigned version of Char, which is the type of c.
-template <typename UnsignedChar, typename Char>
-void PrintCharAndCodeTo(Char c, ostream* os) {
-  // First, print c as a literal in the most readable form we can find.
-  *os << ((sizeof(c) > 1) ? "L'" : "'");
-  const CharFormat format = PrintAsCharLiteralTo<UnsignedChar>(c, os);
-  *os << "'";
-
-  // To aid user debugging, we also print c's code in decimal, unless
-  // it's 0 (in which case c was printed as '\\0', making the code
-  // obvious).
-  if (c == 0)
-    return;
-  *os << " (" << static_cast<int>(c);
-
-  // For more convenience, we print c's code again in hexadecimal,
-  // unless c was already printed in the form '\x##' or the code is in
-  // [1, 9].
-  if (format == kHexEscape || (1 <= c && c <= 9)) {
-    // Do nothing.
-  } else {
-    *os << ", 0x" << String::FormatHexInt(static_cast<int>(c));
-  }
-  *os << ")";
-}
-
-void PrintTo(unsigned char c, ::std::ostream* os) {
-  PrintCharAndCodeTo<unsigned char>(c, os);
-}
-void PrintTo(signed char c, ::std::ostream* os) {
-  PrintCharAndCodeTo<unsigned char>(c, os);
-}
-
-// Prints a wchar_t as a symbol if it is printable or as its internal
-// code otherwise and also as its code.  L'\0' is printed as "L'\\0'".
-void PrintTo(wchar_t wc, ostream* os) {
-  PrintCharAndCodeTo<wchar_t>(wc, os);
-}
-
-// Prints the given array of characters to the ostream.  CharType must be either
-// char or wchar_t.
-// The array starts at begin, the length is len, it may include '\0' characters
-// and may not be NUL-terminated.
-template <typename CharType>
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-static CharFormat PrintCharsAsStringTo(
-    const CharType* begin, size_t len, ostream* os) {
-  const char* const kQuoteBegin = sizeof(CharType) == 1 ? "\"" : "L\"";
-  *os << kQuoteBegin;
-  bool is_previous_hex = false;
-  CharFormat print_format = kAsIs;
-  for (size_t index = 0; index < len; ++index) {
-    const CharType cur = begin[index];
-    if (is_previous_hex && IsXDigit(cur)) {
-      // Previous character is of '\x..' form and this character can be
-      // interpreted as another hexadecimal digit in its number. Break string to
-      // disambiguate.
-      *os << "\" " << kQuoteBegin;
-    }
-    is_previous_hex = PrintAsStringLiteralTo(cur, os) == kHexEscape;
-    // Remember if any characters required hex escaping.
-    if (is_previous_hex) {
-      print_format = kHexEscape;
-    }
-  }
-  *os << "\"";
-  return print_format;
-}
-
-// Prints a (const) char/wchar_t array of 'len' elements, starting at address
-// 'begin'.  CharType must be either char or wchar_t.
-template <typename CharType>
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-static void UniversalPrintCharArray(
-    const CharType* begin, size_t len, ostream* os) {
-  // The code
-  //   const char kFoo[] = "foo";
-  // generates an array of 4, not 3, elements, with the last one being '\0'.
-  //
-  // Therefore when printing a char array, we don't print the last element if
-  // it's '\0', such that the output matches the string literal as it's
-  // written in the source code.
-  if (len > 0 && begin[len - 1] == '\0') {
-    PrintCharsAsStringTo(begin, len - 1, os);
-    return;
-  }
-
-  // If, however, the last element in the array is not '\0', e.g.
-  //    const char kFoo[] = { 'f', 'o', 'o' };
-  // we must print the entire array.  We also print a message to indicate
-  // that the array is not NUL-terminated.
-  PrintCharsAsStringTo(begin, len, os);
-  *os << " (no terminating NUL)";
-}
-
-// Prints a (const) char array of 'len' elements, starting at address 'begin'.
-void UniversalPrintArray(const char* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-
-// Prints a (const) wchar_t array of 'len' elements, starting at address
-// 'begin'.
-void UniversalPrintArray(const wchar_t* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-
-// Prints the given C string to the ostream.
-void PrintTo(const char* s, ostream* os) {
-  if (s == nullptr) {
-    *os << "NULL";
-  } else {
-    *os << ImplicitCast_<const void*>(s) << " pointing to ";
-    PrintCharsAsStringTo(s, strlen(s), os);
-  }
-}
-
-// MSVC compiler can be configured to define whar_t as a typedef
-// of unsigned short. Defining an overload for const wchar_t* in that case
-// would cause pointers to unsigned shorts be printed as wide strings,
-// possibly accessing more memory than intended and causing invalid
-// memory accesses. MSVC defines _NATIVE_WCHAR_T_DEFINED symbol when
-// wchar_t is implemented as a native type.
-#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
-// Prints the given wide C string to the ostream.
-void PrintTo(const wchar_t* s, ostream* os) {
-  if (s == nullptr) {
-    *os << "NULL";
-  } else {
-    *os << ImplicitCast_<const void*>(s) << " pointing to ";
-    PrintCharsAsStringTo(s, wcslen(s), os);
-  }
-}
-#endif  // wchar_t is native
-
-namespace {
-
-bool ContainsUnprintableControlCodes(const char* str, size_t length) {
-  const unsigned char *s = reinterpret_cast<const unsigned char *>(str);
-
-  for (size_t i = 0; i < length; i++) {
-    unsigned char ch = *s++;
-    if (std::iscntrl(ch)) {
-        switch (ch) {
-        case '\t':
-        case '\n':
-        case '\r':
-          break;
-        default:
-          return true;
-        }
-      }
-  }
-  return false;
-}
-
-bool IsUTF8TrailByte(unsigned char t) { return 0x80 <= t && t<= 0xbf; }
-
-bool IsValidUTF8(const char* str, size_t length) {
-  const unsigned char *s = reinterpret_cast<const unsigned char *>(str);
-
-  for (size_t i = 0; i < length;) {
-    unsigned char lead = s[i++];
-
-    if (lead <= 0x7f) {
-      continue;  // single-byte character (ASCII) 0..7F
-    }
-    if (lead < 0xc2) {
-      return false;  // trail byte or non-shortest form
-    } else if (lead <= 0xdf && (i + 1) <= length && IsUTF8TrailByte(s[i])) {
-      ++i;  // 2-byte character
-    } else if (0xe0 <= lead && lead <= 0xef && (i + 2) <= length &&
-               IsUTF8TrailByte(s[i]) &&
-               IsUTF8TrailByte(s[i + 1]) &&
-               // check for non-shortest form and surrogate
-               (lead != 0xe0 || s[i] >= 0xa0) &&
-               (lead != 0xed || s[i] < 0xa0)) {
-      i += 2;  // 3-byte character
-    } else if (0xf0 <= lead && lead <= 0xf4 && (i + 3) <= length &&
-               IsUTF8TrailByte(s[i]) &&
-               IsUTF8TrailByte(s[i + 1]) &&
-               IsUTF8TrailByte(s[i + 2]) &&
-               // check for non-shortest form
-               (lead != 0xf0 || s[i] >= 0x90) &&
-               (lead != 0xf4 || s[i] < 0x90)) {
-      i += 3;  // 4-byte character
-    } else {
-      return false;
-    }
-  }
-  return true;
-}
-
-void ConditionalPrintAsText(const char* str, size_t length, ostream* os) {
-  if (!ContainsUnprintableControlCodes(str, length) &&
-      IsValidUTF8(str, length)) {
-    *os << "\n    As Text: \"" << str << "\"";
-  }
-}
-
-}  // anonymous namespace
-
-void PrintStringTo(const ::std::string& s, ostream* os) {
-  if (PrintCharsAsStringTo(s.data(), s.size(), os) == kHexEscape) {
-    if (GTEST_FLAG(print_utf8)) {
-      ConditionalPrintAsText(s.data(), s.size(), os);
-    }
-  }
-}
-
-#if GTEST_HAS_STD_WSTRING
-void PrintWideStringTo(const ::std::wstring& s, ostream* os) {
-  PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-}  // namespace internal
-
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest-test-part.cc b/3rdparty/gtest/src/gtest-test-part.cc
deleted file mode 100644
index 178317a6..00000000
--- a/3rdparty/gtest/src/gtest-test-part.cc
+++ /dev/null
@@ -1,104 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-
-#include "gtest/gtest-test-part.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-
-using internal::GetUnitTestImpl;
-
-// Gets the summary of the failure message by omitting the stack trace
-// in it.
-std::string TestPartResult::ExtractSummary(const char* message) {
-  const char* const stack_trace = strstr(message, internal::kStackTraceMarker);
-  return stack_trace == nullptr ? message : std::string(message, stack_trace);
-}
-
-// Prints a TestPartResult object.
-std::ostream& operator<<(std::ostream& os, const TestPartResult& result) {
-  return os << result.file_name() << ":" << result.line_number() << ": "
-            << (result.type() == TestPartResult::kSuccess
-                    ? "Success"
-                    : result.type() == TestPartResult::kSkip
-                          ? "Skipped"
-                          : result.type() == TestPartResult::kFatalFailure
-                                ? "Fatal failure"
-                                : "Non-fatal failure")
-            << ":\n"
-            << result.message() << std::endl;
-}
-
-// Appends a TestPartResult to the array.
-void TestPartResultArray::Append(const TestPartResult& result) {
-  array_.push_back(result);
-}
-
-// Returns the TestPartResult at the given index (0-based).
-const TestPartResult& TestPartResultArray::GetTestPartResult(int index) const {
-  if (index < 0 || index >= size()) {
-    printf("\nInvalid index (%d) into TestPartResultArray.\n", index);
-    internal::posix::Abort();
-  }
-
-  return array_[static_cast<size_t>(index)];
-}
-
-// Returns the number of TestPartResult objects in the array.
-int TestPartResultArray::size() const {
-  return static_cast<int>(array_.size());
-}
-
-namespace internal {
-
-HasNewFatalFailureHelper::HasNewFatalFailureHelper()
-    : has_new_fatal_failure_(false),
-      original_reporter_(GetUnitTestImpl()->
-                         GetTestPartResultReporterForCurrentThread()) {
-  GetUnitTestImpl()->SetTestPartResultReporterForCurrentThread(this);
-}
-
-HasNewFatalFailureHelper::~HasNewFatalFailureHelper() {
-  GetUnitTestImpl()->SetTestPartResultReporterForCurrentThread(
-      original_reporter_);
-}
-
-void HasNewFatalFailureHelper::ReportTestPartResult(
-    const TestPartResult& result) {
-  if (result.fatally_failed())
-    has_new_fatal_failure_ = true;
-  original_reporter_->ReportTestPartResult(result);
-}
-
-}  // namespace internal
-
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest-typed-test.cc b/3rdparty/gtest/src/gtest-typed-test.cc
deleted file mode 100644
index 8677caf7..00000000
--- a/3rdparty/gtest/src/gtest-typed-test.cc
+++ /dev/null
@@ -1,118 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest-typed-test.h"
-
-#include "gtest/gtest.h"
-
-namespace testing {
-namespace internal {
-
-#if GTEST_HAS_TYPED_TEST_P
-
-// Skips to the first non-space char in str. Returns an empty string if str
-// contains only whitespace characters.
-static const char* SkipSpaces(const char* str) {
-  while (IsSpace(*str))
-    str++;
-  return str;
-}
-
-static std::vector<std::string> SplitIntoTestNames(const char* src) {
-  std::vector<std::string> name_vec;
-  src = SkipSpaces(src);
-  for (; src != nullptr; src = SkipComma(src)) {
-    name_vec.push_back(StripTrailingSpaces(GetPrefixUntilComma(src)));
-  }
-  return name_vec;
-}
-
-// Verifies that registered_tests match the test names in
-// registered_tests_; returns registered_tests if successful, or
-// aborts the program otherwise.
-const char* TypedTestSuitePState::VerifyRegisteredTestNames(
-    const char* file, int line, const char* registered_tests) {
-  typedef RegisteredTestsMap::const_iterator RegisteredTestIter;
-  registered_ = true;
-
-  std::vector<std::string> name_vec = SplitIntoTestNames(registered_tests);
-
-  Message errors;
-
-  std::set<std::string> tests;
-  for (std::vector<std::string>::const_iterator name_it = name_vec.begin();
-       name_it != name_vec.end(); ++name_it) {
-    const std::string& name = *name_it;
-    if (tests.count(name) != 0) {
-      errors << "Test " << name << " is listed more than once.\n";
-      continue;
-    }
-
-    bool found = false;
-    for (RegisteredTestIter it = registered_tests_.begin();
-         it != registered_tests_.end();
-         ++it) {
-      if (name == it->first) {
-        found = true;
-        break;
-      }
-    }
-
-    if (found) {
-      tests.insert(name);
-    } else {
-      errors << "No test named " << name
-             << " can be found in this test suite.\n";
-    }
-  }
-
-  for (RegisteredTestIter it = registered_tests_.begin();
-       it != registered_tests_.end();
-       ++it) {
-    if (tests.count(it->first) == 0) {
-      errors << "You forgot to list test " << it->first << ".\n";
-    }
-  }
-
-  const std::string& errors_str = errors.GetString();
-  if (errors_str != "") {
-    fprintf(stderr, "%s %s", FormatFileLocation(file, line).c_str(),
-            errors_str.c_str());
-    fflush(stderr);
-    posix::Abort();
-  }
-
-  return registered_tests;
-}
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-
-}  // namespace internal
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest.cc b/3rdparty/gtest/src/gtest.cc
deleted file mode 100644
index a5b4e5ac..00000000
--- a/3rdparty/gtest/src/gtest.cc
+++ /dev/null
@@ -1,6177 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-
-#include "gtest/gtest.h"
-#include "gtest/internal/custom/gtest.h"
-#include "gtest/gtest-spi.h"
-
-#include <ctype.h>
-#include <math.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <time.h>
-#include <wchar.h>
-#include <wctype.h>
-
-#include <algorithm>
-#include <iomanip>
-#include <limits>
-#include <list>
-#include <map>
-#include <ostream>  // NOLINT
-#include <sstream>
-#include <vector>
-
-#if GTEST_OS_LINUX
-
-# define GTEST_HAS_GETTIMEOFDAY_ 1
-
-# include <fcntl.h>  // NOLINT
-# include <limits.h>  // NOLINT
-# include <sched.h>  // NOLINT
-// Declares vsnprintf().  This header is not available on Windows.
-# include <strings.h>  // NOLINT
-# include <sys/mman.h>  // NOLINT
-# include <sys/time.h>  // NOLINT
-# include <unistd.h>  // NOLINT
-# include <string>
-
-#elif GTEST_OS_ZOS
-# define GTEST_HAS_GETTIMEOFDAY_ 1
-# include <sys/time.h>  // NOLINT
-
-// On z/OS we additionally need strings.h for strcasecmp.
-# include <strings.h>  // NOLINT
-
-#elif GTEST_OS_WINDOWS_MOBILE  // We are on Windows CE.
-
-# include <windows.h>  // NOLINT
-# undef min
-
-#elif GTEST_OS_WINDOWS  // We are on Windows proper.
-
-# include <windows.h>  // NOLINT
-# undef min
-
-# include <crtdbg.h>  // NOLINT
-# include <debugapi.h>  // NOLINT
-# include <io.h>  // NOLINT
-# include <sys/timeb.h>  // NOLINT
-# include <sys/types.h>  // NOLINT
-# include <sys/stat.h>  // NOLINT
-
-# if GTEST_OS_WINDOWS_MINGW
-// MinGW has gettimeofday() but not _ftime64().
-#  define GTEST_HAS_GETTIMEOFDAY_ 1
-#  include <sys/time.h>  // NOLINT
-# endif  // GTEST_OS_WINDOWS_MINGW
-
-#else
-
-// Assume other platforms have gettimeofday().
-# define GTEST_HAS_GETTIMEOFDAY_ 1
-
-// cpplint thinks that the header is already included, so we want to
-// silence it.
-# include <sys/time.h>  // NOLINT
-# include <unistd.h>  // NOLINT
-
-#endif  // GTEST_OS_LINUX
-
-#if GTEST_HAS_EXCEPTIONS
-# include <stdexcept>
-#endif
-
-#if GTEST_CAN_STREAM_RESULTS_
-# include <arpa/inet.h>  // NOLINT
-# include <netdb.h>  // NOLINT
-# include <sys/socket.h>  // NOLINT
-# include <sys/types.h>  // NOLINT
-#endif
-
-#include "src/gtest-internal-inl.h"
-
-#if GTEST_OS_WINDOWS
-# define vsnprintf _vsnprintf
-#endif  // GTEST_OS_WINDOWS
-
-#if GTEST_OS_MAC
-#ifndef GTEST_OS_IOS
-#include <crt_externs.h>
-#endif
-#endif
-
-#if GTEST_HAS_ABSL
-#include "absl/debugging/failure_signal_handler.h"
-#include "absl/debugging/stacktrace.h"
-#include "absl/debugging/symbolize.h"
-#include "absl/strings/str_cat.h"
-#endif  // GTEST_HAS_ABSL
-
-namespace testing {
-
-using internal::CountIf;
-using internal::ForEach;
-using internal::GetElementOr;
-using internal::Shuffle;
-
-// Constants.
-
-// A test whose test suite name or test name matches this filter is
-// disabled and not run.
-static const char kDisableTestFilter[] = "DISABLED_*:*/DISABLED_*";
-
-// A test suite whose name matches this filter is considered a death
-// test suite and will be run before test suites whose name doesn't
-// match this filter.
-static const char kDeathTestSuiteFilter[] = "*DeathTest:*DeathTest/*";
-
-// A test filter that matches everything.
-static const char kUniversalFilter[] = "*";
-
-// The default output format.
-static const char kDefaultOutputFormat[] = "xml";
-// The default output file.
-static const char kDefaultOutputFile[] = "test_detail";
-
-// The environment variable name for the test shard index.
-static const char kTestShardIndex[] = "GTEST_SHARD_INDEX";
-// The environment variable name for the total number of test shards.
-static const char kTestTotalShards[] = "GTEST_TOTAL_SHARDS";
-// The environment variable name for the test shard status file.
-static const char kTestShardStatusFile[] = "GTEST_SHARD_STATUS_FILE";
-
-namespace internal {
-
-// The text used in failure messages to indicate the start of the
-// stack trace.
-const char kStackTraceMarker[] = "\nStack trace:\n";
-
-// g_help_flag is true if and only if the --help flag or an equivalent form
-// is specified on the command line.
-bool g_help_flag = false;
-
-// Utilty function to Open File for Writing
-static FILE* OpenFileForWriting(const std::string& output_file) {
-  FILE* fileout = nullptr;
-  FilePath output_file_path(output_file);
-  FilePath output_dir(output_file_path.RemoveFileName());
-
-  if (output_dir.CreateDirectoriesRecursively()) {
-    fileout = posix::FOpen(output_file.c_str(), "w");
-  }
-  if (fileout == nullptr) {
-    GTEST_LOG_(FATAL) << "Unable to open file \"" << output_file << "\"";
-  }
-  return fileout;
-}
-
-}  // namespace internal
-
-// Bazel passes in the argument to '--test_filter' via the TESTBRIDGE_TEST_ONLY
-// environment variable.
-static const char* GetDefaultFilter() {
-  const char* const testbridge_test_only =
-      internal::posix::GetEnv("TESTBRIDGE_TEST_ONLY");
-  if (testbridge_test_only != nullptr) {
-    return testbridge_test_only;
-  }
-  return kUniversalFilter;
-}
-
-GTEST_DEFINE_bool_(
-    also_run_disabled_tests,
-    internal::BoolFromGTestEnv("also_run_disabled_tests", false),
-    "Run disabled tests too, in addition to the tests normally being run.");
-
-GTEST_DEFINE_bool_(
-    break_on_failure, internal::BoolFromGTestEnv("break_on_failure", false),
-    "True if and only if a failed assertion should be a debugger "
-    "break-point.");
-
-GTEST_DEFINE_bool_(catch_exceptions,
-                   internal::BoolFromGTestEnv("catch_exceptions", true),
-                   "True if and only if " GTEST_NAME_
-                   " should catch exceptions and treat them as test failures.");
-
-GTEST_DEFINE_string_(
-    color,
-    internal::StringFromGTestEnv("color", "auto"),
-    "Whether to use colors in the output.  Valid values: yes, no, "
-    "and auto.  'auto' means to use colors if the output is "
-    "being sent to a terminal and the TERM environment variable "
-    "is set to a terminal type that supports colors.");
-
-GTEST_DEFINE_string_(
-    filter,
-    internal::StringFromGTestEnv("filter", GetDefaultFilter()),
-    "A colon-separated list of glob (not regex) patterns "
-    "for filtering the tests to run, optionally followed by a "
-    "'-' and a : separated list of negative patterns (tests to "
-    "exclude).  A test is run if it matches one of the positive "
-    "patterns and does not match any of the negative patterns.");
-
-GTEST_DEFINE_bool_(
-    install_failure_signal_handler,
-    internal::BoolFromGTestEnv("install_failure_signal_handler", false),
-    "If true and supported on the current platform, " GTEST_NAME_ " should "
-    "install a signal handler that dumps debugging information when fatal "
-    "signals are raised.");
-
-GTEST_DEFINE_bool_(list_tests, false,
-                   "List all tests without running them.");
-
-// The net priority order after flag processing is thus:
-//   --gtest_output command line flag
-//   GTEST_OUTPUT environment variable
-//   XML_OUTPUT_FILE environment variable
-//   ''
-GTEST_DEFINE_string_(
-    output,
-    internal::StringFromGTestEnv("output",
-      internal::OutputFlagAlsoCheckEnvVar().c_str()),
-    "A format (defaults to \"xml\" but can be specified to be \"json\"), "
-    "optionally followed by a colon and an output file name or directory. "
-    "A directory is indicated by a trailing pathname separator. "
-    "Examples: \"xml:filename.xml\", \"xml::directoryname/\". "
-    "If a directory is specified, output files will be created "
-    "within that directory, with file-names based on the test "
-    "executable's name and, if necessary, made unique by adding "
-    "digits.");
-
-GTEST_DEFINE_bool_(print_time, internal::BoolFromGTestEnv("print_time", true),
-                   "True if and only if " GTEST_NAME_
-                   " should display elapsed time in text output.");
-
-GTEST_DEFINE_bool_(print_utf8, internal::BoolFromGTestEnv("print_utf8", true),
-                   "True if and only if " GTEST_NAME_
-                   " prints UTF8 characters as text.");
-
-GTEST_DEFINE_int32_(
-    random_seed,
-    internal::Int32FromGTestEnv("random_seed", 0),
-    "Random number seed to use when shuffling test orders.  Must be in range "
-    "[1, 99999], or 0 to use a seed based on the current time.");
-
-GTEST_DEFINE_int32_(
-    repeat,
-    internal::Int32FromGTestEnv("repeat", 1),
-    "How many times to repeat each test.  Specify a negative number "
-    "for repeating forever.  Useful for shaking out flaky tests.");
-
-GTEST_DEFINE_bool_(show_internal_stack_frames, false,
-                   "True if and only if " GTEST_NAME_
-                   " should include internal stack frames when "
-                   "printing test failure stack traces.");
-
-GTEST_DEFINE_bool_(shuffle, internal::BoolFromGTestEnv("shuffle", false),
-                   "True if and only if " GTEST_NAME_
-                   " should randomize tests' order on every run.");
-
-GTEST_DEFINE_int32_(
-    stack_trace_depth,
-    internal::Int32FromGTestEnv("stack_trace_depth", kMaxStackTraceDepth),
-    "The maximum number of stack frames to print when an "
-    "assertion fails.  The valid range is 0 through 100, inclusive.");
-
-GTEST_DEFINE_string_(
-    stream_result_to,
-    internal::StringFromGTestEnv("stream_result_to", ""),
-    "This flag specifies the host name and the port number on which to stream "
-    "test results. Example: \"localhost:555\". The flag is effective only on "
-    "Linux.");
-
-GTEST_DEFINE_bool_(
-    throw_on_failure,
-    internal::BoolFromGTestEnv("throw_on_failure", false),
-    "When this flag is specified, a failed assertion will throw an exception "
-    "if exceptions are enabled or exit the program with a non-zero code "
-    "otherwise. For use with an external test framework.");
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-GTEST_DEFINE_string_(
-    flagfile,
-    internal::StringFromGTestEnv("flagfile", ""),
-    "This flag specifies the flagfile to read command-line flags from.");
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-namespace internal {
-
-// Generates a random number from [0, range), using a Linear
-// Congruential Generator (LCG).  Crashes if 'range' is 0 or greater
-// than kMaxRange.
-UInt32 Random::Generate(UInt32 range) {
-  // These constants are the same as are used in glibc's rand(3).
-  // Use wider types than necessary to prevent unsigned overflow diagnostics.
-  state_ = static_cast<UInt32>(1103515245ULL*state_ + 12345U) % kMaxRange;
-
-  GTEST_CHECK_(range > 0)
-      << "Cannot generate a number in the range [0, 0).";
-  GTEST_CHECK_(range <= kMaxRange)
-      << "Generation of a number in [0, " << range << ") was requested, "
-      << "but this can only generate numbers in [0, " << kMaxRange << ").";
-
-  // Converting via modulus introduces a bit of downward bias, but
-  // it's simple, and a linear congruential generator isn't too good
-  // to begin with.
-  return state_ % range;
-}
-
-// GTestIsInitialized() returns true if and only if the user has initialized
-// Google Test.  Useful for catching the user mistake of not initializing
-// Google Test before calling RUN_ALL_TESTS().
-static bool GTestIsInitialized() { return GetArgvs().size() > 0; }
-
-// Iterates over a vector of TestSuites, keeping a running sum of the
-// results of calling a given int-returning method on each.
-// Returns the sum.
-static int SumOverTestSuiteList(const std::vector<TestSuite*>& case_list,
-                                int (TestSuite::*method)() const) {
-  int sum = 0;
-  for (size_t i = 0; i < case_list.size(); i++) {
-    sum += (case_list[i]->*method)();
-  }
-  return sum;
-}
-
-// Returns true if and only if the test suite passed.
-static bool TestSuitePassed(const TestSuite* test_suite) {
-  return test_suite->should_run() && test_suite->Passed();
-}
-
-// Returns true if and only if the test suite failed.
-static bool TestSuiteFailed(const TestSuite* test_suite) {
-  return test_suite->should_run() && test_suite->Failed();
-}
-
-// Returns true if and only if test_suite contains at least one test that
-// should run.
-static bool ShouldRunTestSuite(const TestSuite* test_suite) {
-  return test_suite->should_run();
-}
-
-// AssertHelper constructor.
-AssertHelper::AssertHelper(TestPartResult::Type type,
-                           const char* file,
-                           int line,
-                           const char* message)
-    : data_(new AssertHelperData(type, file, line, message)) {
-}
-
-AssertHelper::~AssertHelper() {
-  delete data_;
-}
-
-// Message assignment, for assertion streaming support.
-void AssertHelper::operator=(const Message& message) const {
-  UnitTest::GetInstance()->
-    AddTestPartResult(data_->type, data_->file, data_->line,
-                      AppendUserMessage(data_->message, message),
-                      UnitTest::GetInstance()->impl()
-                      ->CurrentOsStackTraceExceptTop(1)
-                      // Skips the stack frame for this function itself.
-                      );  // NOLINT
-}
-
-// A copy of all command line arguments.  Set by InitGoogleTest().
-static ::std::vector<std::string> g_argvs;
-
-::std::vector<std::string> GetArgvs() {
-#if defined(GTEST_CUSTOM_GET_ARGVS_)
-  // GTEST_CUSTOM_GET_ARGVS_() may return a container of std::string or
-  // ::string. This code converts it to the appropriate type.
-  const auto& custom = GTEST_CUSTOM_GET_ARGVS_();
-  return ::std::vector<std::string>(custom.begin(), custom.end());
-#else   // defined(GTEST_CUSTOM_GET_ARGVS_)
-  return g_argvs;
-#endif  // defined(GTEST_CUSTOM_GET_ARGVS_)
-}
-
-// Returns the current application's name, removing directory path if that
-// is present.
-FilePath GetCurrentExecutableName() {
-  FilePath result;
-
-#if GTEST_OS_WINDOWS || GTEST_OS_OS2
-  result.Set(FilePath(GetArgvs()[0]).RemoveExtension("exe"));
-#else
-  result.Set(FilePath(GetArgvs()[0]));
-#endif  // GTEST_OS_WINDOWS
-
-  return result.RemoveDirectoryName();
-}
-
-// Functions for processing the gtest_output flag.
-
-// Returns the output format, or "" for normal printed output.
-std::string UnitTestOptions::GetOutputFormat() {
-  const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
-  const char* const colon = strchr(gtest_output_flag, ':');
-  return (colon == nullptr)
-             ? std::string(gtest_output_flag)
-             : std::string(gtest_output_flag,
-                           static_cast<size_t>(colon - gtest_output_flag));
-}
-
-// Returns the name of the requested output file, or the default if none
-// was explicitly specified.
-std::string UnitTestOptions::GetAbsolutePathToOutputFile() {
-  const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
-
-  std::string format = GetOutputFormat();
-  if (format.empty())
-    format = std::string(kDefaultOutputFormat);
-
-  const char* const colon = strchr(gtest_output_flag, ':');
-  if (colon == nullptr)
-    return internal::FilePath::MakeFileName(
-        internal::FilePath(
-            UnitTest::GetInstance()->original_working_dir()),
-        internal::FilePath(kDefaultOutputFile), 0,
-        format.c_str()).string();
-
-  internal::FilePath output_name(colon + 1);
-  if (!output_name.IsAbsolutePath())
-    output_name = internal::FilePath::ConcatPaths(
-        internal::FilePath(UnitTest::GetInstance()->original_working_dir()),
-        internal::FilePath(colon + 1));
-
-  if (!output_name.IsDirectory())
-    return output_name.string();
-
-  internal::FilePath result(internal::FilePath::GenerateUniqueFileName(
-      output_name, internal::GetCurrentExecutableName(),
-      GetOutputFormat().c_str()));
-  return result.string();
-}
-
-// Returns true if and only if the wildcard pattern matches the string.
-// The first ':' or '\0' character in pattern marks the end of it.
-//
-// This recursive algorithm isn't very efficient, but is clear and
-// works well enough for matching test names, which are short.
-bool UnitTestOptions::PatternMatchesString(const char *pattern,
-                                           const char *str) {
-  switch (*pattern) {
-    case '\0':
-    case ':':  // Either ':' or '\0' marks the end of the pattern.
-      return *str == '\0';
-    case '?':  // Matches any single character.
-      return *str != '\0' && PatternMatchesString(pattern + 1, str + 1);
-    case '*':  // Matches any string (possibly empty) of characters.
-      return (*str != '\0' && PatternMatchesString(pattern, str + 1)) ||
-          PatternMatchesString(pattern + 1, str);
-    default:  // Non-special character.  Matches itself.
-      return *pattern == *str &&
-          PatternMatchesString(pattern + 1, str + 1);
-  }
-}
-
-bool UnitTestOptions::MatchesFilter(
-    const std::string& name, const char* filter) {
-  const char *cur_pattern = filter;
-  for (;;) {
-    if (PatternMatchesString(cur_pattern, name.c_str())) {
-      return true;
-    }
-
-    // Finds the next pattern in the filter.
-    cur_pattern = strchr(cur_pattern, ':');
-
-    // Returns if no more pattern can be found.
-    if (cur_pattern == nullptr) {
-      return false;
-    }
-
-    // Skips the pattern separater (the ':' character).
-    cur_pattern++;
-  }
-}
-
-// Returns true if and only if the user-specified filter matches the test
-// suite name and the test name.
-bool UnitTestOptions::FilterMatchesTest(const std::string& test_suite_name,
-                                        const std::string& test_name) {
-  const std::string& full_name = test_suite_name + "." + test_name.c_str();
-
-  // Split --gtest_filter at '-', if there is one, to separate into
-  // positive filter and negative filter portions
-  const char* const p = GTEST_FLAG(filter).c_str();
-  const char* const dash = strchr(p, '-');
-  std::string positive;
-  std::string negative;
-  if (dash == nullptr) {
-    positive = GTEST_FLAG(filter).c_str();  // Whole string is a positive filter
-    negative = "";
-  } else {
-    positive = std::string(p, dash);   // Everything up to the dash
-    negative = std::string(dash + 1);  // Everything after the dash
-    if (positive.empty()) {
-      // Treat '-test1' as the same as '*-test1'
-      positive = kUniversalFilter;
-    }
-  }
-
-  // A filter is a colon-separated list of patterns.  It matches a
-  // test if any pattern in it matches the test.
-  return (MatchesFilter(full_name, positive.c_str()) &&
-          !MatchesFilter(full_name, negative.c_str()));
-}
-
-#if GTEST_HAS_SEH
-// Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
-// given SEH exception, or EXCEPTION_CONTINUE_SEARCH otherwise.
-// This function is useful as an __except condition.
-int UnitTestOptions::GTestShouldProcessSEH(DWORD exception_code) {
-  // Google Test should handle a SEH exception if:
-  //   1. the user wants it to, AND
-  //   2. this is not a breakpoint exception, AND
-  //   3. this is not a C++ exception (VC++ implements them via SEH,
-  //      apparently).
-  //
-  // SEH exception code for C++ exceptions.
-  // (see http://support.microsoft.com/kb/185294 for more information).
-  const DWORD kCxxExceptionCode = 0xe06d7363;
-
-  bool should_handle = true;
-
-  if (!GTEST_FLAG(catch_exceptions))
-    should_handle = false;
-  else if (exception_code == EXCEPTION_BREAKPOINT)
-    should_handle = false;
-  else if (exception_code == kCxxExceptionCode)
-    should_handle = false;
-
-  return should_handle ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH;
-}
-#endif  // GTEST_HAS_SEH
-
-}  // namespace internal
-
-// The c'tor sets this object as the test part result reporter used by
-// Google Test.  The 'result' parameter specifies where to report the
-// results. Intercepts only failures from the current thread.
-ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
-    TestPartResultArray* result)
-    : intercept_mode_(INTERCEPT_ONLY_CURRENT_THREAD),
-      result_(result) {
-  Init();
-}
-
-// The c'tor sets this object as the test part result reporter used by
-// Google Test.  The 'result' parameter specifies where to report the
-// results.
-ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
-    InterceptMode intercept_mode, TestPartResultArray* result)
-    : intercept_mode_(intercept_mode),
-      result_(result) {
-  Init();
-}
-
-void ScopedFakeTestPartResultReporter::Init() {
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
-    old_reporter_ = impl->GetGlobalTestPartResultReporter();
-    impl->SetGlobalTestPartResultReporter(this);
-  } else {
-    old_reporter_ = impl->GetTestPartResultReporterForCurrentThread();
-    impl->SetTestPartResultReporterForCurrentThread(this);
-  }
-}
-
-// The d'tor restores the test part result reporter used by Google Test
-// before.
-ScopedFakeTestPartResultReporter::~ScopedFakeTestPartResultReporter() {
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
-    impl->SetGlobalTestPartResultReporter(old_reporter_);
-  } else {
-    impl->SetTestPartResultReporterForCurrentThread(old_reporter_);
-  }
-}
-
-// Increments the test part result count and remembers the result.
-// This method is from the TestPartResultReporterInterface interface.
-void ScopedFakeTestPartResultReporter::ReportTestPartResult(
-    const TestPartResult& result) {
-  result_->Append(result);
-}
-
-namespace internal {
-
-// Returns the type ID of ::testing::Test.  We should always call this
-// instead of GetTypeId< ::testing::Test>() to get the type ID of
-// testing::Test.  This is to work around a suspected linker bug when
-// using Google Test as a framework on Mac OS X.  The bug causes
-// GetTypeId< ::testing::Test>() to return different values depending
-// on whether the call is from the Google Test framework itself or
-// from user test code.  GetTestTypeId() is guaranteed to always
-// return the same value, as it always calls GetTypeId<>() from the
-// gtest.cc, which is within the Google Test framework.
-TypeId GetTestTypeId() {
-  return GetTypeId<Test>();
-}
-
-// The value of GetTestTypeId() as seen from within the Google Test
-// library.  This is solely for testing GetTestTypeId().
-extern const TypeId kTestTypeIdInGoogleTest = GetTestTypeId();
-
-// This predicate-formatter checks that 'results' contains a test part
-// failure of the given type and that the failure message contains the
-// given substring.
-static AssertionResult HasOneFailure(const char* /* results_expr */,
-                                     const char* /* type_expr */,
-                                     const char* /* substr_expr */,
-                                     const TestPartResultArray& results,
-                                     TestPartResult::Type type,
-                                     const std::string& substr) {
-  const std::string expected(type == TestPartResult::kFatalFailure ?
-                        "1 fatal failure" :
-                        "1 non-fatal failure");
-  Message msg;
-  if (results.size() != 1) {
-    msg << "Expected: " << expected << "\n"
-        << "  Actual: " << results.size() << " failures";
-    for (int i = 0; i < results.size(); i++) {
-      msg << "\n" << results.GetTestPartResult(i);
-    }
-    return AssertionFailure() << msg;
-  }
-
-  const TestPartResult& r = results.GetTestPartResult(0);
-  if (r.type() != type) {
-    return AssertionFailure() << "Expected: " << expected << "\n"
-                              << "  Actual:\n"
-                              << r;
-  }
-
-  if (strstr(r.message(), substr.c_str()) == nullptr) {
-    return AssertionFailure() << "Expected: " << expected << " containing \""
-                              << substr << "\"\n"
-                              << "  Actual:\n"
-                              << r;
-  }
-
-  return AssertionSuccess();
-}
-
-// The constructor of SingleFailureChecker remembers where to look up
-// test part results, what type of failure we expect, and what
-// substring the failure message should contain.
-SingleFailureChecker::SingleFailureChecker(const TestPartResultArray* results,
-                                           TestPartResult::Type type,
-                                           const std::string& substr)
-    : results_(results), type_(type), substr_(substr) {}
-
-// The destructor of SingleFailureChecker verifies that the given
-// TestPartResultArray contains exactly one failure that has the given
-// type and contains the given substring.  If that's not the case, a
-// non-fatal failure will be generated.
-SingleFailureChecker::~SingleFailureChecker() {
-  EXPECT_PRED_FORMAT3(HasOneFailure, *results_, type_, substr_);
-}
-
-DefaultGlobalTestPartResultReporter::DefaultGlobalTestPartResultReporter(
-    UnitTestImpl* unit_test) : unit_test_(unit_test) {}
-
-void DefaultGlobalTestPartResultReporter::ReportTestPartResult(
-    const TestPartResult& result) {
-  unit_test_->current_test_result()->AddTestPartResult(result);
-  unit_test_->listeners()->repeater()->OnTestPartResult(result);
-}
-
-DefaultPerThreadTestPartResultReporter::DefaultPerThreadTestPartResultReporter(
-    UnitTestImpl* unit_test) : unit_test_(unit_test) {}
-
-void DefaultPerThreadTestPartResultReporter::ReportTestPartResult(
-    const TestPartResult& result) {
-  unit_test_->GetGlobalTestPartResultReporter()->ReportTestPartResult(result);
-}
-
-// Returns the global test part result reporter.
-TestPartResultReporterInterface*
-UnitTestImpl::GetGlobalTestPartResultReporter() {
-  internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
-  return global_test_part_result_repoter_;
-}
-
-// Sets the global test part result reporter.
-void UnitTestImpl::SetGlobalTestPartResultReporter(
-    TestPartResultReporterInterface* reporter) {
-  internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
-  global_test_part_result_repoter_ = reporter;
-}
-
-// Returns the test part result reporter for the current thread.
-TestPartResultReporterInterface*
-UnitTestImpl::GetTestPartResultReporterForCurrentThread() {
-  return per_thread_test_part_result_reporter_.get();
-}
-
-// Sets the test part result reporter for the current thread.
-void UnitTestImpl::SetTestPartResultReporterForCurrentThread(
-    TestPartResultReporterInterface* reporter) {
-  per_thread_test_part_result_reporter_.set(reporter);
-}
-
-// Gets the number of successful test suites.
-int UnitTestImpl::successful_test_suite_count() const {
-  return CountIf(test_suites_, TestSuitePassed);
-}
-
-// Gets the number of failed test suites.
-int UnitTestImpl::failed_test_suite_count() const {
-  return CountIf(test_suites_, TestSuiteFailed);
-}
-
-// Gets the number of all test suites.
-int UnitTestImpl::total_test_suite_count() const {
-  return static_cast<int>(test_suites_.size());
-}
-
-// Gets the number of all test suites that contain at least one test
-// that should run.
-int UnitTestImpl::test_suite_to_run_count() const {
-  return CountIf(test_suites_, ShouldRunTestSuite);
-}
-
-// Gets the number of successful tests.
-int UnitTestImpl::successful_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::successful_test_count);
-}
-
-// Gets the number of skipped tests.
-int UnitTestImpl::skipped_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::skipped_test_count);
-}
-
-// Gets the number of failed tests.
-int UnitTestImpl::failed_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::failed_test_count);
-}
-
-// Gets the number of disabled tests that will be reported in the XML report.
-int UnitTestImpl::reportable_disabled_test_count() const {
-  return SumOverTestSuiteList(test_suites_,
-                              &TestSuite::reportable_disabled_test_count);
-}
-
-// Gets the number of disabled tests.
-int UnitTestImpl::disabled_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::disabled_test_count);
-}
-
-// Gets the number of tests to be printed in the XML report.
-int UnitTestImpl::reportable_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::reportable_test_count);
-}
-
-// Gets the number of all tests.
-int UnitTestImpl::total_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::total_test_count);
-}
-
-// Gets the number of tests that should run.
-int UnitTestImpl::test_to_run_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::test_to_run_count);
-}
-
-// Returns the current OS stack trace as an std::string.
-//
-// The maximum number of stack frames to be included is specified by
-// the gtest_stack_trace_depth flag.  The skip_count parameter
-// specifies the number of top frames to be skipped, which doesn't
-// count against the number of frames to be included.
-//
-// For example, if Foo() calls Bar(), which in turn calls
-// CurrentOsStackTraceExceptTop(1), Foo() will be included in the
-// trace but Bar() and CurrentOsStackTraceExceptTop() won't.
-std::string UnitTestImpl::CurrentOsStackTraceExceptTop(int skip_count) {
-  return os_stack_trace_getter()->CurrentStackTrace(
-      static_cast<int>(GTEST_FLAG(stack_trace_depth)),
-      skip_count + 1
-      // Skips the user-specified number of frames plus this function
-      // itself.
-      );  // NOLINT
-}
-
-// Returns the current time in milliseconds.
-TimeInMillis GetTimeInMillis() {
-#if GTEST_OS_WINDOWS_MOBILE || defined(__BORLANDC__)
-  // Difference between 1970-01-01 and 1601-01-01 in milliseconds.
-  // http://analogous.blogspot.com/2005/04/epoch.html
-  const TimeInMillis kJavaEpochToWinFileTimeDelta =
-    static_cast<TimeInMillis>(116444736UL) * 100000UL;
-  const DWORD kTenthMicrosInMilliSecond = 10000;
-
-  SYSTEMTIME now_systime;
-  FILETIME now_filetime;
-  ULARGE_INTEGER now_int64;
-  GetSystemTime(&now_systime);
-  if (SystemTimeToFileTime(&now_systime, &now_filetime)) {
-    now_int64.LowPart = now_filetime.dwLowDateTime;
-    now_int64.HighPart = now_filetime.dwHighDateTime;
-    now_int64.QuadPart = (now_int64.QuadPart / kTenthMicrosInMilliSecond) -
-      kJavaEpochToWinFileTimeDelta;
-    return now_int64.QuadPart;
-  }
-  return 0;
-#elif GTEST_OS_WINDOWS && !GTEST_HAS_GETTIMEOFDAY_
-  __timeb64 now;
-
-  // MSVC 8 deprecates _ftime64(), so we want to suppress warning 4996
-  // (deprecated function) there.
-  GTEST_DISABLE_MSC_DEPRECATED_PUSH_()
-  _ftime64(&now);
-  GTEST_DISABLE_MSC_DEPRECATED_POP_()
-
-  return static_cast<TimeInMillis>(now.time) * 1000 + now.millitm;
-#elif GTEST_HAS_GETTIMEOFDAY_
-  struct timeval now;
-  gettimeofday(&now, nullptr);
-  return static_cast<TimeInMillis>(now.tv_sec) * 1000 + now.tv_usec / 1000;
-#else
-# error "Don't know how to get the current time on your system."
-#endif
-}
-
-// Utilities
-
-// class String.
-
-#if GTEST_OS_WINDOWS_MOBILE
-// Creates a UTF-16 wide string from the given ANSI string, allocating
-// memory using new. The caller is responsible for deleting the return
-// value using delete[]. Returns the wide string, or NULL if the
-// input is NULL.
-LPCWSTR String::AnsiToUtf16(const char* ansi) {
-  if (!ansi) return nullptr;
-  const int length = strlen(ansi);
-  const int unicode_length =
-      MultiByteToWideChar(CP_ACP, 0, ansi, length, nullptr, 0);
-  WCHAR* unicode = new WCHAR[unicode_length + 1];
-  MultiByteToWideChar(CP_ACP, 0, ansi, length,
-                      unicode, unicode_length);
-  unicode[unicode_length] = 0;
-  return unicode;
-}
-
-// Creates an ANSI string from the given wide string, allocating
-// memory using new. The caller is responsible for deleting the return
-// value using delete[]. Returns the ANSI string, or NULL if the
-// input is NULL.
-const char* String::Utf16ToAnsi(LPCWSTR utf16_str)  {
-  if (!utf16_str) return nullptr;
-  const int ansi_length = WideCharToMultiByte(CP_ACP, 0, utf16_str, -1, nullptr,
-                                              0, nullptr, nullptr);
-  char* ansi = new char[ansi_length + 1];
-  WideCharToMultiByte(CP_ACP, 0, utf16_str, -1, ansi, ansi_length, nullptr,
-                      nullptr);
-  ansi[ansi_length] = 0;
-  return ansi;
-}
-
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-// Compares two C strings.  Returns true if and only if they have the same
-// content.
-//
-// Unlike strcmp(), this function can handle NULL argument(s).  A NULL
-// C string is considered different to any non-NULL C string,
-// including the empty string.
-bool String::CStringEquals(const char * lhs, const char * rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-
-  if (rhs == nullptr) return false;
-
-  return strcmp(lhs, rhs) == 0;
-}
-
-#if GTEST_HAS_STD_WSTRING
-
-// Converts an array of wide chars to a narrow string using the UTF-8
-// encoding, and streams the result to the given Message object.
-static void StreamWideCharsToMessage(const wchar_t* wstr, size_t length,
-                                     Message* msg) {
-  for (size_t i = 0; i != length; ) {  // NOLINT
-    if (wstr[i] != L'\0') {
-      *msg << WideStringToUtf8(wstr + i, static_cast<int>(length - i));
-      while (i != length && wstr[i] != L'\0')
-        i++;
-    } else {
-      *msg << '\0';
-      i++;
-    }
-  }
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-void SplitString(const ::std::string& str, char delimiter,
-                 ::std::vector< ::std::string>* dest) {
-  ::std::vector< ::std::string> parsed;
-  ::std::string::size_type pos = 0;
-  while (::testing::internal::AlwaysTrue()) {
-    const ::std::string::size_type colon = str.find(delimiter, pos);
-    if (colon == ::std::string::npos) {
-      parsed.push_back(str.substr(pos));
-      break;
-    } else {
-      parsed.push_back(str.substr(pos, colon - pos));
-      pos = colon + 1;
-    }
-  }
-  dest->swap(parsed);
-}
-
-}  // namespace internal
-
-// Constructs an empty Message.
-// We allocate the stringstream separately because otherwise each use of
-// ASSERT/EXPECT in a procedure adds over 200 bytes to the procedure's
-// stack frame leading to huge stack frames in some cases; gcc does not reuse
-// the stack space.
-Message::Message() : ss_(new ::std::stringstream) {
-  // By default, we want there to be enough precision when printing
-  // a double to a Message.
-  *ss_ << std::setprecision(std::numeric_limits<double>::digits10 + 2);
-}
-
-// These two overloads allow streaming a wide C string to a Message
-// using the UTF-8 encoding.
-Message& Message::operator <<(const wchar_t* wide_c_str) {
-  return *this << internal::String::ShowWideCString(wide_c_str);
-}
-Message& Message::operator <<(wchar_t* wide_c_str) {
-  return *this << internal::String::ShowWideCString(wide_c_str);
-}
-
-#if GTEST_HAS_STD_WSTRING
-// Converts the given wide string to a narrow string using the UTF-8
-// encoding, and streams the result to this Message object.
-Message& Message::operator <<(const ::std::wstring& wstr) {
-  internal::StreamWideCharsToMessage(wstr.c_str(), wstr.length(), this);
-  return *this;
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Gets the text streamed to this object so far as an std::string.
-// Each '\0' character in the buffer is replaced with "\\0".
-std::string Message::GetString() const {
-  return internal::StringStreamToString(ss_.get());
-}
-
-// AssertionResult constructors.
-// Used in EXPECT_TRUE/FALSE(assertion_result).
-AssertionResult::AssertionResult(const AssertionResult& other)
-    : success_(other.success_),
-      message_(other.message_.get() != nullptr
-                   ? new ::std::string(*other.message_)
-                   : static_cast< ::std::string*>(nullptr)) {}
-
-// Swaps two AssertionResults.
-void AssertionResult::swap(AssertionResult& other) {
-  using std::swap;
-  swap(success_, other.success_);
-  swap(message_, other.message_);
-}
-
-// Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
-AssertionResult AssertionResult::operator!() const {
-  AssertionResult negation(!success_);
-  if (message_.get() != nullptr) negation << *message_;
-  return negation;
-}
-
-// Makes a successful assertion result.
-AssertionResult AssertionSuccess() {
-  return AssertionResult(true);
-}
-
-// Makes a failed assertion result.
-AssertionResult AssertionFailure() {
-  return AssertionResult(false);
-}
-
-// Makes a failed assertion result with the given failure message.
-// Deprecated; use AssertionFailure() << message.
-AssertionResult AssertionFailure(const Message& message) {
-  return AssertionFailure() << message;
-}
-
-namespace internal {
-
-namespace edit_distance {
-std::vector<EditType> CalculateOptimalEdits(const std::vector<size_t>& left,
-                                            const std::vector<size_t>& right) {
-  std::vector<std::vector<double> > costs(
-      left.size() + 1, std::vector<double>(right.size() + 1));
-  std::vector<std::vector<EditType> > best_move(
-      left.size() + 1, std::vector<EditType>(right.size() + 1));
-
-  // Populate for empty right.
-  for (size_t l_i = 0; l_i < costs.size(); ++l_i) {
-    costs[l_i][0] = static_cast<double>(l_i);
-    best_move[l_i][0] = kRemove;
-  }
-  // Populate for empty left.
-  for (size_t r_i = 1; r_i < costs[0].size(); ++r_i) {
-    costs[0][r_i] = static_cast<double>(r_i);
-    best_move[0][r_i] = kAdd;
-  }
-
-  for (size_t l_i = 0; l_i < left.size(); ++l_i) {
-    for (size_t r_i = 0; r_i < right.size(); ++r_i) {
-      if (left[l_i] == right[r_i]) {
-        // Found a match. Consume it.
-        costs[l_i + 1][r_i + 1] = costs[l_i][r_i];
-        best_move[l_i + 1][r_i + 1] = kMatch;
-        continue;
-      }
-
-      const double add = costs[l_i + 1][r_i];
-      const double remove = costs[l_i][r_i + 1];
-      const double replace = costs[l_i][r_i];
-      if (add < remove && add < replace) {
-        costs[l_i + 1][r_i + 1] = add + 1;
-        best_move[l_i + 1][r_i + 1] = kAdd;
-      } else if (remove < add && remove < replace) {
-        costs[l_i + 1][r_i + 1] = remove + 1;
-        best_move[l_i + 1][r_i + 1] = kRemove;
-      } else {
-        // We make replace a little more expensive than add/remove to lower
-        // their priority.
-        costs[l_i + 1][r_i + 1] = replace + 1.00001;
-        best_move[l_i + 1][r_i + 1] = kReplace;
-      }
-    }
-  }
-
-  // Reconstruct the best path. We do it in reverse order.
-  std::vector<EditType> best_path;
-  for (size_t l_i = left.size(), r_i = right.size(); l_i > 0 || r_i > 0;) {
-    EditType move = best_move[l_i][r_i];
-    best_path.push_back(move);
-    l_i -= move != kAdd;
-    r_i -= move != kRemove;
-  }
-  std::reverse(best_path.begin(), best_path.end());
-  return best_path;
-}
-
-namespace {
-
-// Helper class to convert string into ids with deduplication.
-class InternalStrings {
- public:
-  size_t GetId(const std::string& str) {
-    IdMap::iterator it = ids_.find(str);
-    if (it != ids_.end()) return it->second;
-    size_t id = ids_.size();
-    return ids_[str] = id;
-  }
-
- private:
-  typedef std::map<std::string, size_t> IdMap;
-  IdMap ids_;
-};
-
-}  // namespace
-
-std::vector<EditType> CalculateOptimalEdits(
-    const std::vector<std::string>& left,
-    const std::vector<std::string>& right) {
-  std::vector<size_t> left_ids, right_ids;
-  {
-    InternalStrings intern_table;
-    for (size_t i = 0; i < left.size(); ++i) {
-      left_ids.push_back(intern_table.GetId(left[i]));
-    }
-    for (size_t i = 0; i < right.size(); ++i) {
-      right_ids.push_back(intern_table.GetId(right[i]));
-    }
-  }
-  return CalculateOptimalEdits(left_ids, right_ids);
-}
-
-namespace {
-
-// Helper class that holds the state for one hunk and prints it out to the
-// stream.
-// It reorders adds/removes when possible to group all removes before all
-// adds. It also adds the hunk header before printint into the stream.
-class Hunk {
- public:
-  Hunk(size_t left_start, size_t right_start)
-      : left_start_(left_start),
-        right_start_(right_start),
-        adds_(),
-        removes_(),
-        common_() {}
-
-  void PushLine(char edit, const char* line) {
-    switch (edit) {
-      case ' ':
-        ++common_;
-        FlushEdits();
-        hunk_.push_back(std::make_pair(' ', line));
-        break;
-      case '-':
-        ++removes_;
-        hunk_removes_.push_back(std::make_pair('-', line));
-        break;
-      case '+':
-        ++adds_;
-        hunk_adds_.push_back(std::make_pair('+', line));
-        break;
-    }
-  }
-
-  void PrintTo(std::ostream* os) {
-    PrintHeader(os);
-    FlushEdits();
-    for (std::list<std::pair<char, const char*> >::const_iterator it =
-             hunk_.begin();
-         it != hunk_.end(); ++it) {
-      *os << it->first << it->second << "\n";
-    }
-  }
-
-  bool has_edits() const { return adds_ || removes_; }
-
- private:
-  void FlushEdits() {
-    hunk_.splice(hunk_.end(), hunk_removes_);
-    hunk_.splice(hunk_.end(), hunk_adds_);
-  }
-
-  // Print a unified diff header for one hunk.
-  // The format is
-  //   "@@ -<left_start>,<left_length> +<right_start>,<right_length> @@"
-  // where the left/right parts are omitted if unnecessary.
-  void PrintHeader(std::ostream* ss) const {
-    *ss << "@@ ";
-    if (removes_) {
-      *ss << "-" << left_start_ << "," << (removes_ + common_);
-    }
-    if (removes_ && adds_) {
-      *ss << " ";
-    }
-    if (adds_) {
-      *ss << "+" << right_start_ << "," << (adds_ + common_);
-    }
-    *ss << " @@\n";
-  }
-
-  size_t left_start_, right_start_;
-  size_t adds_, removes_, common_;
-  std::list<std::pair<char, const char*> > hunk_, hunk_adds_, hunk_removes_;
-};
-
-}  // namespace
-
-// Create a list of diff hunks in Unified diff format.
-// Each hunk has a header generated by PrintHeader above plus a body with
-// lines prefixed with ' ' for no change, '-' for deletion and '+' for
-// addition.
-// 'context' represents the desired unchanged prefix/suffix around the diff.
-// If two hunks are close enough that their contexts overlap, then they are
-// joined into one hunk.
-std::string CreateUnifiedDiff(const std::vector<std::string>& left,
-                              const std::vector<std::string>& right,
-                              size_t context) {
-  const std::vector<EditType> edits = CalculateOptimalEdits(left, right);
-
-  size_t l_i = 0, r_i = 0, edit_i = 0;
-  std::stringstream ss;
-  while (edit_i < edits.size()) {
-    // Find first edit.
-    while (edit_i < edits.size() && edits[edit_i] == kMatch) {
-      ++l_i;
-      ++r_i;
-      ++edit_i;
-    }
-
-    // Find the first line to include in the hunk.
-    const size_t prefix_context = std::min(l_i, context);
-    Hunk hunk(l_i - prefix_context + 1, r_i - prefix_context + 1);
-    for (size_t i = prefix_context; i > 0; --i) {
-      hunk.PushLine(' ', left[l_i - i].c_str());
-    }
-
-    // Iterate the edits until we found enough suffix for the hunk or the input
-    // is over.
-    size_t n_suffix = 0;
-    for (; edit_i < edits.size(); ++edit_i) {
-      if (n_suffix >= context) {
-        // Continue only if the next hunk is very close.
-        auto it = edits.begin() + static_cast<int>(edit_i);
-        while (it != edits.end() && *it == kMatch) ++it;
-        if (it == edits.end() ||
-            static_cast<size_t>(it - edits.begin()) - edit_i >= context) {
-          // There is no next edit or it is too far away.
-          break;
-        }
-      }
-
-      EditType edit = edits[edit_i];
-      // Reset count when a non match is found.
-      n_suffix = edit == kMatch ? n_suffix + 1 : 0;
-
-      if (edit == kMatch || edit == kRemove || edit == kReplace) {
-        hunk.PushLine(edit == kMatch ? ' ' : '-', left[l_i].c_str());
-      }
-      if (edit == kAdd || edit == kReplace) {
-        hunk.PushLine('+', right[r_i].c_str());
-      }
-
-      // Advance indices, depending on edit type.
-      l_i += edit != kAdd;
-      r_i += edit != kRemove;
-    }
-
-    if (!hunk.has_edits()) {
-      // We are done. We don't want this hunk.
-      break;
-    }
-
-    hunk.PrintTo(&ss);
-  }
-  return ss.str();
-}
-
-}  // namespace edit_distance
-
-namespace {
-
-// The string representation of the values received in EqFailure() are already
-// escaped. Split them on escaped '\n' boundaries. Leave all other escaped
-// characters the same.
-std::vector<std::string> SplitEscapedString(const std::string& str) {
-  std::vector<std::string> lines;
-  size_t start = 0, end = str.size();
-  if (end > 2 && str[0] == '"' && str[end - 1] == '"') {
-    ++start;
-    --end;
-  }
-  bool escaped = false;
-  for (size_t i = start; i + 1 < end; ++i) {
-    if (escaped) {
-      escaped = false;
-      if (str[i] == 'n') {
-        lines.push_back(str.substr(start, i - start - 1));
-        start = i + 1;
-      }
-    } else {
-      escaped = str[i] == '\\';
-    }
-  }
-  lines.push_back(str.substr(start, end - start));
-  return lines;
-}
-
-}  // namespace
-
-// Constructs and returns the message for an equality assertion
-// (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
-//
-// The first four parameters are the expressions used in the assertion
-// and their values, as strings.  For example, for ASSERT_EQ(foo, bar)
-// where foo is 5 and bar is 6, we have:
-//
-//   lhs_expression: "foo"
-//   rhs_expression: "bar"
-//   lhs_value:      "5"
-//   rhs_value:      "6"
-//
-// The ignoring_case parameter is true if and only if the assertion is a
-// *_STRCASEEQ*.  When it's true, the string "Ignoring case" will
-// be inserted into the message.
-AssertionResult EqFailure(const char* lhs_expression,
-                          const char* rhs_expression,
-                          const std::string& lhs_value,
-                          const std::string& rhs_value,
-                          bool ignoring_case) {
-  Message msg;
-  msg << "Expected equality of these values:";
-  msg << "\n  " << lhs_expression;
-  if (lhs_value != lhs_expression) {
-    msg << "\n    Which is: " << lhs_value;
-  }
-  msg << "\n  " << rhs_expression;
-  if (rhs_value != rhs_expression) {
-    msg << "\n    Which is: " << rhs_value;
-  }
-
-  if (ignoring_case) {
-    msg << "\nIgnoring case";
-  }
-
-  if (!lhs_value.empty() && !rhs_value.empty()) {
-    const std::vector<std::string> lhs_lines =
-        SplitEscapedString(lhs_value);
-    const std::vector<std::string> rhs_lines =
-        SplitEscapedString(rhs_value);
-    if (lhs_lines.size() > 1 || rhs_lines.size() > 1) {
-      msg << "\nWith diff:\n"
-          << edit_distance::CreateUnifiedDiff(lhs_lines, rhs_lines);
-    }
-  }
-
-  return AssertionFailure() << msg;
-}
-
-// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
-std::string GetBoolAssertionFailureMessage(
-    const AssertionResult& assertion_result,
-    const char* expression_text,
-    const char* actual_predicate_value,
-    const char* expected_predicate_value) {
-  const char* actual_message = assertion_result.message();
-  Message msg;
-  msg << "Value of: " << expression_text
-      << "\n  Actual: " << actual_predicate_value;
-  if (actual_message[0] != '\0')
-    msg << " (" << actual_message << ")";
-  msg << "\nExpected: " << expected_predicate_value;
-  return msg.GetString();
-}
-
-// Helper function for implementing ASSERT_NEAR.
-AssertionResult DoubleNearPredFormat(const char* expr1,
-                                     const char* expr2,
-                                     const char* abs_error_expr,
-                                     double val1,
-                                     double val2,
-                                     double abs_error) {
-  const double diff = fabs(val1 - val2);
-  if (diff <= abs_error) return AssertionSuccess();
-
-  return AssertionFailure()
-      << "The difference between " << expr1 << " and " << expr2
-      << " is " << diff << ", which exceeds " << abs_error_expr << ", where\n"
-      << expr1 << " evaluates to " << val1 << ",\n"
-      << expr2 << " evaluates to " << val2 << ", and\n"
-      << abs_error_expr << " evaluates to " << abs_error << ".";
-}
-
-
-// Helper template for implementing FloatLE() and DoubleLE().
-template <typename RawType>
-AssertionResult FloatingPointLE(const char* expr1,
-                                const char* expr2,
-                                RawType val1,
-                                RawType val2) {
-  // Returns success if val1 is less than val2,
-  if (val1 < val2) {
-    return AssertionSuccess();
-  }
-
-  // or if val1 is almost equal to val2.
-  const FloatingPoint<RawType> lhs(val1), rhs(val2);
-  if (lhs.AlmostEquals(rhs)) {
-    return AssertionSuccess();
-  }
-
-  // Note that the above two checks will both fail if either val1 or
-  // val2 is NaN, as the IEEE floating-point standard requires that
-  // any predicate involving a NaN must return false.
-
-  ::std::stringstream val1_ss;
-  val1_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-          << val1;
-
-  ::std::stringstream val2_ss;
-  val2_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-          << val2;
-
-  return AssertionFailure()
-      << "Expected: (" << expr1 << ") <= (" << expr2 << ")\n"
-      << "  Actual: " << StringStreamToString(&val1_ss) << " vs "
-      << StringStreamToString(&val2_ss);
-}
-
-}  // namespace internal
-
-// Asserts that val1 is less than, or almost equal to, val2.  Fails
-// otherwise.  In particular, it fails if either val1 or val2 is NaN.
-AssertionResult FloatLE(const char* expr1, const char* expr2,
-                        float val1, float val2) {
-  return internal::FloatingPointLE<float>(expr1, expr2, val1, val2);
-}
-
-// Asserts that val1 is less than, or almost equal to, val2.  Fails
-// otherwise.  In particular, it fails if either val1 or val2 is NaN.
-AssertionResult DoubleLE(const char* expr1, const char* expr2,
-                         double val1, double val2) {
-  return internal::FloatingPointLE<double>(expr1, expr2, val1, val2);
-}
-
-namespace internal {
-
-// The helper function for {ASSERT|EXPECT}_EQ with int or enum
-// arguments.
-AssertionResult CmpHelperEQ(const char* lhs_expression,
-                            const char* rhs_expression,
-                            BiggestInt lhs,
-                            BiggestInt rhs) {
-  if (lhs == rhs) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   FormatForComparisonFailureMessage(lhs, rhs),
-                   FormatForComparisonFailureMessage(rhs, lhs),
-                   false);
-}
-
-// A macro for implementing the helper functions needed to implement
-// ASSERT_?? and EXPECT_?? with integer or enum arguments.  It is here
-// just to avoid copy-and-paste of similar code.
-#define GTEST_IMPL_CMP_HELPER_(op_name, op)\
-AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
-                                   BiggestInt val1, BiggestInt val2) {\
-  if (val1 op val2) {\
-    return AssertionSuccess();\
-  } else {\
-    return AssertionFailure() \
-        << "Expected: (" << expr1 << ") " #op " (" << expr2\
-        << "), actual: " << FormatForComparisonFailureMessage(val1, val2)\
-        << " vs " << FormatForComparisonFailureMessage(val2, val1);\
-  }\
-}
-
-// Implements the helper function for {ASSERT|EXPECT}_NE with int or
-// enum arguments.
-GTEST_IMPL_CMP_HELPER_(NE, !=)
-// Implements the helper function for {ASSERT|EXPECT}_LE with int or
-// enum arguments.
-GTEST_IMPL_CMP_HELPER_(LE, <=)
-// Implements the helper function for {ASSERT|EXPECT}_LT with int or
-// enum arguments.
-GTEST_IMPL_CMP_HELPER_(LT, < )
-// Implements the helper function for {ASSERT|EXPECT}_GE with int or
-// enum arguments.
-GTEST_IMPL_CMP_HELPER_(GE, >=)
-// Implements the helper function for {ASSERT|EXPECT}_GT with int or
-// enum arguments.
-GTEST_IMPL_CMP_HELPER_(GT, > )
-
-#undef GTEST_IMPL_CMP_HELPER_
-
-// The helper function for {ASSERT|EXPECT}_STREQ.
-AssertionResult CmpHelperSTREQ(const char* lhs_expression,
-                               const char* rhs_expression,
-                               const char* lhs,
-                               const char* rhs) {
-  if (String::CStringEquals(lhs, rhs)) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   PrintToString(lhs),
-                   PrintToString(rhs),
-                   false);
-}
-
-// The helper function for {ASSERT|EXPECT}_STRCASEEQ.
-AssertionResult CmpHelperSTRCASEEQ(const char* lhs_expression,
-                                   const char* rhs_expression,
-                                   const char* lhs,
-                                   const char* rhs) {
-  if (String::CaseInsensitiveCStringEquals(lhs, rhs)) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   PrintToString(lhs),
-                   PrintToString(rhs),
-                   true);
-}
-
-// The helper function for {ASSERT|EXPECT}_STRNE.
-AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                               const char* s2_expression,
-                               const char* s1,
-                               const char* s2) {
-  if (!String::CStringEquals(s1, s2)) {
-    return AssertionSuccess();
-  } else {
-    return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
-                              << s2_expression << "), actual: \""
-                              << s1 << "\" vs \"" << s2 << "\"";
-  }
-}
-
-// The helper function for {ASSERT|EXPECT}_STRCASENE.
-AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
-                                   const char* s2_expression,
-                                   const char* s1,
-                                   const char* s2) {
-  if (!String::CaseInsensitiveCStringEquals(s1, s2)) {
-    return AssertionSuccess();
-  } else {
-    return AssertionFailure()
-        << "Expected: (" << s1_expression << ") != ("
-        << s2_expression << ") (ignoring case), actual: \""
-        << s1 << "\" vs \"" << s2 << "\"";
-  }
-}
-
-}  // namespace internal
-
-namespace {
-
-// Helper functions for implementing IsSubString() and IsNotSubstring().
-
-// This group of overloaded functions return true if and only if needle
-// is a substring of haystack.  NULL is considered a substring of
-// itself only.
-
-bool IsSubstringPred(const char* needle, const char* haystack) {
-  if (needle == nullptr || haystack == nullptr) return needle == haystack;
-
-  return strstr(haystack, needle) != nullptr;
-}
-
-bool IsSubstringPred(const wchar_t* needle, const wchar_t* haystack) {
-  if (needle == nullptr || haystack == nullptr) return needle == haystack;
-
-  return wcsstr(haystack, needle) != nullptr;
-}
-
-// StringType here can be either ::std::string or ::std::wstring.
-template <typename StringType>
-bool IsSubstringPred(const StringType& needle,
-                     const StringType& haystack) {
-  return haystack.find(needle) != StringType::npos;
-}
-
-// This function implements either IsSubstring() or IsNotSubstring(),
-// depending on the value of the expected_to_be_substring parameter.
-// StringType here can be const char*, const wchar_t*, ::std::string,
-// or ::std::wstring.
-template <typename StringType>
-AssertionResult IsSubstringImpl(
-    bool expected_to_be_substring,
-    const char* needle_expr, const char* haystack_expr,
-    const StringType& needle, const StringType& haystack) {
-  if (IsSubstringPred(needle, haystack) == expected_to_be_substring)
-    return AssertionSuccess();
-
-  const bool is_wide_string = sizeof(needle[0]) > 1;
-  const char* const begin_string_quote = is_wide_string ? "L\"" : "\"";
-  return AssertionFailure()
-      << "Value of: " << needle_expr << "\n"
-      << "  Actual: " << begin_string_quote << needle << "\"\n"
-      << "Expected: " << (expected_to_be_substring ? "" : "not ")
-      << "a substring of " << haystack_expr << "\n"
-      << "Which is: " << begin_string_quote << haystack << "\"";
-}
-
-}  // namespace
-
-// IsSubstring() and IsNotSubstring() check whether needle is a
-// substring of haystack (NULL is considered a substring of itself
-// only), and return an appropriate error message when they fail.
-
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-
-#if GTEST_HAS_STD_WSTRING
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-namespace internal {
-
-#if GTEST_OS_WINDOWS
-
-namespace {
-
-// Helper function for IsHRESULT{SuccessFailure} predicates
-AssertionResult HRESULTFailureHelper(const char* expr,
-                                     const char* expected,
-                                     long hr) {  // NOLINT
-# if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_TV_TITLE
-
-  // Windows CE doesn't support FormatMessage.
-  const char error_text[] = "";
-
-# else
-
-  // Looks up the human-readable system message for the HRESULT code
-  // and since we're not passing any params to FormatMessage, we don't
-  // want inserts expanded.
-  const DWORD kFlags = FORMAT_MESSAGE_FROM_SYSTEM |
-                       FORMAT_MESSAGE_IGNORE_INSERTS;
-  const DWORD kBufSize = 4096;
-  // Gets the system's human readable message string for this HRESULT.
-  char error_text[kBufSize] = { '\0' };
-  DWORD message_length = ::FormatMessageA(kFlags,
-                                          0,   // no source, we're asking system
-                                          static_cast<DWORD>(hr),  // the error
-                                          0,   // no line width restrictions
-                                          error_text,  // output buffer
-                                          kBufSize,    // buf size
-                                          nullptr);  // no arguments for inserts
-  // Trims tailing white space (FormatMessage leaves a trailing CR-LF)
-  for (; message_length && IsSpace(error_text[message_length - 1]);
-          --message_length) {
-    error_text[message_length - 1] = '\0';
-  }
-
-# endif  // GTEST_OS_WINDOWS_MOBILE
-
-  const std::string error_hex("0x" + String::FormatHexInt(hr));
-  return ::testing::AssertionFailure()
-      << "Expected: " << expr << " " << expected << ".\n"
-      << "  Actual: " << error_hex << " " << error_text << "\n";
-}
-
-}  // namespace
-
-AssertionResult IsHRESULTSuccess(const char* expr, long hr) {  // NOLINT
-  if (SUCCEEDED(hr)) {
-    return AssertionSuccess();
-  }
-  return HRESULTFailureHelper(expr, "succeeds", hr);
-}
-
-AssertionResult IsHRESULTFailure(const char* expr, long hr) {  // NOLINT
-  if (FAILED(hr)) {
-    return AssertionSuccess();
-  }
-  return HRESULTFailureHelper(expr, "fails", hr);
-}
-
-#endif  // GTEST_OS_WINDOWS
-
-// Utility functions for encoding Unicode text (wide strings) in
-// UTF-8.
-
-// A Unicode code-point can have up to 21 bits, and is encoded in UTF-8
-// like this:
-//
-// Code-point length   Encoding
-//   0 -  7 bits       0xxxxxxx
-//   8 - 11 bits       110xxxxx 10xxxxxx
-//  12 - 16 bits       1110xxxx 10xxxxxx 10xxxxxx
-//  17 - 21 bits       11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
-
-// The maximum code-point a one-byte UTF-8 sequence can represent.
-const UInt32 kMaxCodePoint1 = (static_cast<UInt32>(1) <<  7) - 1;
-
-// The maximum code-point a two-byte UTF-8 sequence can represent.
-const UInt32 kMaxCodePoint2 = (static_cast<UInt32>(1) << (5 + 6)) - 1;
-
-// The maximum code-point a three-byte UTF-8 sequence can represent.
-const UInt32 kMaxCodePoint3 = (static_cast<UInt32>(1) << (4 + 2*6)) - 1;
-
-// The maximum code-point a four-byte UTF-8 sequence can represent.
-const UInt32 kMaxCodePoint4 = (static_cast<UInt32>(1) << (3 + 3*6)) - 1;
-
-// Chops off the n lowest bits from a bit pattern.  Returns the n
-// lowest bits.  As a side effect, the original bit pattern will be
-// shifted to the right by n bits.
-inline UInt32 ChopLowBits(UInt32* bits, int n) {
-  const UInt32 low_bits = *bits & ((static_cast<UInt32>(1) << n) - 1);
-  *bits >>= n;
-  return low_bits;
-}
-
-// Converts a Unicode code point to a narrow string in UTF-8 encoding.
-// code_point parameter is of type UInt32 because wchar_t may not be
-// wide enough to contain a code point.
-// If the code_point is not a valid Unicode code point
-// (i.e. outside of Unicode range U+0 to U+10FFFF) it will be converted
-// to "(Invalid Unicode 0xXXXXXXXX)".
-std::string CodePointToUtf8(UInt32 code_point) {
-  if (code_point > kMaxCodePoint4) {
-    return "(Invalid Unicode 0x" + String::FormatHexUInt32(code_point) + ")";
-  }
-
-  char str[5];  // Big enough for the largest valid code point.
-  if (code_point <= kMaxCodePoint1) {
-    str[1] = '\0';
-    str[0] = static_cast<char>(code_point);                          // 0xxxxxxx
-  } else if (code_point <= kMaxCodePoint2) {
-    str[2] = '\0';
-    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[0] = static_cast<char>(0xC0 | code_point);                   // 110xxxxx
-  } else if (code_point <= kMaxCodePoint3) {
-    str[3] = '\0';
-    str[2] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[0] = static_cast<char>(0xE0 | code_point);                   // 1110xxxx
-  } else {  // code_point <= kMaxCodePoint4
-    str[4] = '\0';
-    str[3] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[2] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[0] = static_cast<char>(0xF0 | code_point);                   // 11110xxx
-  }
-  return str;
-}
-
-// The following two functions only make sense if the system
-// uses UTF-16 for wide string encoding. All supported systems
-// with 16 bit wchar_t (Windows, Cygwin) do use UTF-16.
-
-// Determines if the arguments constitute UTF-16 surrogate pair
-// and thus should be combined into a single Unicode code point
-// using CreateCodePointFromUtf16SurrogatePair.
-inline bool IsUtf16SurrogatePair(wchar_t first, wchar_t second) {
-  return sizeof(wchar_t) == 2 &&
-      (first & 0xFC00) == 0xD800 && (second & 0xFC00) == 0xDC00;
-}
-
-// Creates a Unicode code point from UTF16 surrogate pair.
-inline UInt32 CreateCodePointFromUtf16SurrogatePair(wchar_t first,
-                                                    wchar_t second) {
-  const auto first_u = static_cast<UInt32>(first);
-  const auto second_u = static_cast<UInt32>(second);
-  const UInt32 mask = (1 << 10) - 1;
-  return (sizeof(wchar_t) == 2)
-             ? (((first_u & mask) << 10) | (second_u & mask)) + 0x10000
-             :
-             // This function should not be called when the condition is
-             // false, but we provide a sensible default in case it is.
-             first_u;
-}
-
-// Converts a wide string to a narrow string in UTF-8 encoding.
-// The wide string is assumed to have the following encoding:
-//   UTF-16 if sizeof(wchar_t) == 2 (on Windows, Cygwin)
-//   UTF-32 if sizeof(wchar_t) == 4 (on Linux)
-// Parameter str points to a null-terminated wide string.
-// Parameter num_chars may additionally limit the number
-// of wchar_t characters processed. -1 is used when the entire string
-// should be processed.
-// If the string contains code points that are not valid Unicode code points
-// (i.e. outside of Unicode range U+0 to U+10FFFF) they will be output
-// as '(Invalid Unicode 0xXXXXXXXX)'. If the string is in UTF16 encoding
-// and contains invalid UTF-16 surrogate pairs, values in those pairs
-// will be encoded as individual Unicode characters from Basic Normal Plane.
-std::string WideStringToUtf8(const wchar_t* str, int num_chars) {
-  if (num_chars == -1)
-    num_chars = static_cast<int>(wcslen(str));
-
-  ::std::stringstream stream;
-  for (int i = 0; i < num_chars; ++i) {
-    UInt32 unicode_code_point;
-
-    if (str[i] == L'\0') {
-      break;
-    } else if (i + 1 < num_chars && IsUtf16SurrogatePair(str[i], str[i + 1])) {
-      unicode_code_point = CreateCodePointFromUtf16SurrogatePair(str[i],
-                                                                 str[i + 1]);
-      i++;
-    } else {
-      unicode_code_point = static_cast<UInt32>(str[i]);
-    }
-
-    stream << CodePointToUtf8(unicode_code_point);
-  }
-  return StringStreamToString(&stream);
-}
-
-// Converts a wide C string to an std::string using the UTF-8 encoding.
-// NULL will be converted to "(null)".
-std::string String::ShowWideCString(const wchar_t * wide_c_str) {
-  if (wide_c_str == nullptr) return "(null)";
-
-  return internal::WideStringToUtf8(wide_c_str, -1);
-}
-
-// Compares two wide C strings.  Returns true if and only if they have the
-// same content.
-//
-// Unlike wcscmp(), this function can handle NULL argument(s).  A NULL
-// C string is considered different to any non-NULL C string,
-// including the empty string.
-bool String::WideCStringEquals(const wchar_t * lhs, const wchar_t * rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-
-  if (rhs == nullptr) return false;
-
-  return wcscmp(lhs, rhs) == 0;
-}
-
-// Helper function for *_STREQ on wide strings.
-AssertionResult CmpHelperSTREQ(const char* lhs_expression,
-                               const char* rhs_expression,
-                               const wchar_t* lhs,
-                               const wchar_t* rhs) {
-  if (String::WideCStringEquals(lhs, rhs)) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   PrintToString(lhs),
-                   PrintToString(rhs),
-                   false);
-}
-
-// Helper function for *_STRNE on wide strings.
-AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                               const char* s2_expression,
-                               const wchar_t* s1,
-                               const wchar_t* s2) {
-  if (!String::WideCStringEquals(s1, s2)) {
-    return AssertionSuccess();
-  }
-
-  return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
-                            << s2_expression << "), actual: "
-                            << PrintToString(s1)
-                            << " vs " << PrintToString(s2);
-}
-
-// Compares two C strings, ignoring case.  Returns true if and only if they have
-// the same content.
-//
-// Unlike strcasecmp(), this function can handle NULL argument(s).  A
-// NULL C string is considered different to any non-NULL C string,
-// including the empty string.
-bool String::CaseInsensitiveCStringEquals(const char * lhs, const char * rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-  if (rhs == nullptr) return false;
-  return posix::StrCaseCmp(lhs, rhs) == 0;
-}
-
-// Compares two wide C strings, ignoring case.  Returns true if and only if they
-// have the same content.
-//
-// Unlike wcscasecmp(), this function can handle NULL argument(s).
-// A NULL C string is considered different to any non-NULL wide C string,
-// including the empty string.
-// NB: The implementations on different platforms slightly differ.
-// On windows, this method uses _wcsicmp which compares according to LC_CTYPE
-// environment variable. On GNU platform this method uses wcscasecmp
-// which compares according to LC_CTYPE category of the current locale.
-// On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
-// current locale.
-bool String::CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
-                                              const wchar_t* rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-
-  if (rhs == nullptr) return false;
-
-#if GTEST_OS_WINDOWS
-  return _wcsicmp(lhs, rhs) == 0;
-#elif GTEST_OS_LINUX && !GTEST_OS_LINUX_ANDROID
-  return wcscasecmp(lhs, rhs) == 0;
-#else
-  // Android, Mac OS X and Cygwin don't define wcscasecmp.
-  // Other unknown OSes may not define it either.
-  wint_t left, right;
-  do {
-    left = towlower(static_cast<wint_t>(*lhs++));
-    right = towlower(static_cast<wint_t>(*rhs++));
-  } while (left && left == right);
-  return left == right;
-#endif  // OS selector
-}
-
-// Returns true if and only if str ends with the given suffix, ignoring case.
-// Any string is considered to end with an empty suffix.
-bool String::EndsWithCaseInsensitive(
-    const std::string& str, const std::string& suffix) {
-  const size_t str_len = str.length();
-  const size_t suffix_len = suffix.length();
-  return (str_len >= suffix_len) &&
-         CaseInsensitiveCStringEquals(str.c_str() + str_len - suffix_len,
-                                      suffix.c_str());
-}
-
-// Formats an int value as "%02d".
-std::string String::FormatIntWidth2(int value) {
-  std::stringstream ss;
-  ss << std::setfill('0') << std::setw(2) << value;
-  return ss.str();
-}
-
-// Formats an int value as "%X".
-std::string String::FormatHexUInt32(UInt32 value) {
-  std::stringstream ss;
-  ss << std::hex << std::uppercase << value;
-  return ss.str();
-}
-
-// Formats an int value as "%X".
-std::string String::FormatHexInt(int value) {
-  return FormatHexUInt32(static_cast<UInt32>(value));
-}
-
-// Formats a byte as "%02X".
-std::string String::FormatByte(unsigned char value) {
-  std::stringstream ss;
-  ss << std::setfill('0') << std::setw(2) << std::hex << std::uppercase
-     << static_cast<unsigned int>(value);
-  return ss.str();
-}
-
-// Converts the buffer in a stringstream to an std::string, converting NUL
-// bytes to "\\0" along the way.
-std::string StringStreamToString(::std::stringstream* ss) {
-  const ::std::string& str = ss->str();
-  const char* const start = str.c_str();
-  const char* const end = start + str.length();
-
-  std::string result;
-  result.reserve(static_cast<size_t>(2 * (end - start)));
-  for (const char* ch = start; ch != end; ++ch) {
-    if (*ch == '\0') {
-      result += "\\0";  // Replaces NUL with "\\0";
-    } else {
-      result += *ch;
-    }
-  }
-
-  return result;
-}
-
-// Appends the user-supplied message to the Google-Test-generated message.
-std::string AppendUserMessage(const std::string& gtest_msg,
-                              const Message& user_msg) {
-  // Appends the user message if it's non-empty.
-  const std::string user_msg_string = user_msg.GetString();
-  if (user_msg_string.empty()) {
-    return gtest_msg;
-  }
-
-  return gtest_msg + "\n" + user_msg_string;
-}
-
-}  // namespace internal
-
-// class TestResult
-
-// Creates an empty TestResult.
-TestResult::TestResult()
-    : death_test_count_(0), start_timestamp_(0), elapsed_time_(0) {}
-
-// D'tor.
-TestResult::~TestResult() {
-}
-
-// Returns the i-th test part result among all the results. i can
-// range from 0 to total_part_count() - 1. If i is not in that range,
-// aborts the program.
-const TestPartResult& TestResult::GetTestPartResult(int i) const {
-  if (i < 0 || i >= total_part_count())
-    internal::posix::Abort();
-  return test_part_results_.at(static_cast<size_t>(i));
-}
-
-// Returns the i-th test property. i can range from 0 to
-// test_property_count() - 1. If i is not in that range, aborts the
-// program.
-const TestProperty& TestResult::GetTestProperty(int i) const {
-  if (i < 0 || i >= test_property_count())
-    internal::posix::Abort();
-  return test_properties_.at(static_cast<size_t>(i));
-}
-
-// Clears the test part results.
-void TestResult::ClearTestPartResults() {
-  test_part_results_.clear();
-}
-
-// Adds a test part result to the list.
-void TestResult::AddTestPartResult(const TestPartResult& test_part_result) {
-  test_part_results_.push_back(test_part_result);
-}
-
-// Adds a test property to the list. If a property with the same key as the
-// supplied property is already represented, the value of this test_property
-// replaces the old value for that key.
-void TestResult::RecordProperty(const std::string& xml_element,
-                                const TestProperty& test_property) {
-  if (!ValidateTestProperty(xml_element, test_property)) {
-    return;
-  }
-  internal::MutexLock lock(&test_properites_mutex_);
-  const std::vector<TestProperty>::iterator property_with_matching_key =
-      std::find_if(test_properties_.begin(), test_properties_.end(),
-                   internal::TestPropertyKeyIs(test_property.key()));
-  if (property_with_matching_key == test_properties_.end()) {
-    test_properties_.push_back(test_property);
-    return;
-  }
-  property_with_matching_key->SetValue(test_property.value());
-}
-
-// The list of reserved attributes used in the <testsuites> element of XML
-// output.
-static const char* const kReservedTestSuitesAttributes[] = {
-  "disabled",
-  "errors",
-  "failures",
-  "name",
-  "random_seed",
-  "tests",
-  "time",
-  "timestamp"
-};
-
-// The list of reserved attributes used in the <testsuite> element of XML
-// output.
-static const char* const kReservedTestSuiteAttributes[] = {
-    "disabled", "errors", "failures", "name", "tests", "time", "timestamp"};
-
-// The list of reserved attributes used in the <testcase> element of XML output.
-static const char* const kReservedTestCaseAttributes[] = {
-    "classname",   "name", "status", "time",  "type_param",
-    "value_param", "file", "line"};
-
-// Use a slightly different set for allowed output to ensure existing tests can
-// still RecordProperty("result") or "RecordProperty(timestamp")
-static const char* const kReservedOutputTestCaseAttributes[] = {
-    "classname",   "name", "status", "time",   "type_param",
-    "value_param", "file", "line",   "result", "timestamp"};
-
-template <int kSize>
-std::vector<std::string> ArrayAsVector(const char* const (&array)[kSize]) {
-  return std::vector<std::string>(array, array + kSize);
-}
-
-static std::vector<std::string> GetReservedAttributesForElement(
-    const std::string& xml_element) {
-  if (xml_element == "testsuites") {
-    return ArrayAsVector(kReservedTestSuitesAttributes);
-  } else if (xml_element == "testsuite") {
-    return ArrayAsVector(kReservedTestSuiteAttributes);
-  } else if (xml_element == "testcase") {
-    return ArrayAsVector(kReservedTestCaseAttributes);
-  } else {
-    GTEST_CHECK_(false) << "Unrecognized xml_element provided: " << xml_element;
-  }
-  // This code is unreachable but some compilers may not realizes that.
-  return std::vector<std::string>();
-}
-
-// TODO(jdesprez): Merge the two getReserved attributes once skip is improved
-static std::vector<std::string> GetReservedOutputAttributesForElement(
-    const std::string& xml_element) {
-  if (xml_element == "testsuites") {
-    return ArrayAsVector(kReservedTestSuitesAttributes);
-  } else if (xml_element == "testsuite") {
-    return ArrayAsVector(kReservedTestSuiteAttributes);
-  } else if (xml_element == "testcase") {
-    return ArrayAsVector(kReservedOutputTestCaseAttributes);
-  } else {
-    GTEST_CHECK_(false) << "Unrecognized xml_element provided: " << xml_element;
-  }
-  // This code is unreachable but some compilers may not realizes that.
-  return std::vector<std::string>();
-}
-
-static std::string FormatWordList(const std::vector<std::string>& words) {
-  Message word_list;
-  for (size_t i = 0; i < words.size(); ++i) {
-    if (i > 0 && words.size() > 2) {
-      word_list << ", ";
-    }
-    if (i == words.size() - 1) {
-      word_list << "and ";
-    }
-    word_list << "'" << words[i] << "'";
-  }
-  return word_list.GetString();
-}
-
-static bool ValidateTestPropertyName(
-    const std::string& property_name,
-    const std::vector<std::string>& reserved_names) {
-  if (std::find(reserved_names.begin(), reserved_names.end(), property_name) !=
-          reserved_names.end()) {
-    ADD_FAILURE() << "Reserved key used in RecordProperty(): " << property_name
-                  << " (" << FormatWordList(reserved_names)
-                  << " are reserved by " << GTEST_NAME_ << ")";
-    return false;
-  }
-  return true;
-}
-
-// Adds a failure if the key is a reserved attribute of the element named
-// xml_element.  Returns true if the property is valid.
-bool TestResult::ValidateTestProperty(const std::string& xml_element,
-                                      const TestProperty& test_property) {
-  return ValidateTestPropertyName(test_property.key(),
-                                  GetReservedAttributesForElement(xml_element));
-}
-
-// Clears the object.
-void TestResult::Clear() {
-  test_part_results_.clear();
-  test_properties_.clear();
-  death_test_count_ = 0;
-  elapsed_time_ = 0;
-}
-
-// Returns true off the test part was skipped.
-static bool TestPartSkipped(const TestPartResult& result) {
-  return result.skipped();
-}
-
-// Returns true if and only if the test was skipped.
-bool TestResult::Skipped() const {
-  return !Failed() && CountIf(test_part_results_, TestPartSkipped) > 0;
-}
-
-// Returns true if and only if the test failed.
-bool TestResult::Failed() const {
-  for (int i = 0; i < total_part_count(); ++i) {
-    if (GetTestPartResult(i).failed())
-      return true;
-  }
-  return false;
-}
-
-// Returns true if and only if the test part fatally failed.
-static bool TestPartFatallyFailed(const TestPartResult& result) {
-  return result.fatally_failed();
-}
-
-// Returns true if and only if the test fatally failed.
-bool TestResult::HasFatalFailure() const {
-  return CountIf(test_part_results_, TestPartFatallyFailed) > 0;
-}
-
-// Returns true if and only if the test part non-fatally failed.
-static bool TestPartNonfatallyFailed(const TestPartResult& result) {
-  return result.nonfatally_failed();
-}
-
-// Returns true if and only if the test has a non-fatal failure.
-bool TestResult::HasNonfatalFailure() const {
-  return CountIf(test_part_results_, TestPartNonfatallyFailed) > 0;
-}
-
-// Gets the number of all test parts.  This is the sum of the number
-// of successful test parts and the number of failed test parts.
-int TestResult::total_part_count() const {
-  return static_cast<int>(test_part_results_.size());
-}
-
-// Returns the number of the test properties.
-int TestResult::test_property_count() const {
-  return static_cast<int>(test_properties_.size());
-}
-
-// class Test
-
-// Creates a Test object.
-
-// The c'tor saves the states of all flags.
-Test::Test()
-    : gtest_flag_saver_(new GTEST_FLAG_SAVER_) {
-}
-
-// The d'tor restores the states of all flags.  The actual work is
-// done by the d'tor of the gtest_flag_saver_ field, and thus not
-// visible here.
-Test::~Test() {
-}
-
-// Sets up the test fixture.
-//
-// A sub-class may override this.
-void Test::SetUp() {
-}
-
-// Tears down the test fixture.
-//
-// A sub-class may override this.
-void Test::TearDown() {
-}
-
-// Allows user supplied key value pairs to be recorded for later output.
-void Test::RecordProperty(const std::string& key, const std::string& value) {
-  UnitTest::GetInstance()->RecordProperty(key, value);
-}
-
-// Allows user supplied key value pairs to be recorded for later output.
-void Test::RecordProperty(const std::string& key, int value) {
-  Message value_message;
-  value_message << value;
-  RecordProperty(key, value_message.GetString().c_str());
-}
-
-namespace internal {
-
-void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
-                                    const std::string& message) {
-  // This function is a friend of UnitTest and as such has access to
-  // AddTestPartResult.
-  UnitTest::GetInstance()->AddTestPartResult(
-      result_type,
-      nullptr,  // No info about the source file where the exception occurred.
-      -1,       // We have no info on which line caused the exception.
-      message,
-      "");  // No stack trace, either.
-}
-
-}  // namespace internal
-
-// Google Test requires all tests in the same test suite to use the same test
-// fixture class.  This function checks if the current test has the
-// same fixture class as the first test in the current test suite.  If
-// yes, it returns true; otherwise it generates a Google Test failure and
-// returns false.
-bool Test::HasSameFixtureClass() {
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  const TestSuite* const test_suite = impl->current_test_suite();
-
-  // Info about the first test in the current test suite.
-  const TestInfo* const first_test_info = test_suite->test_info_list()[0];
-  const internal::TypeId first_fixture_id = first_test_info->fixture_class_id_;
-  const char* const first_test_name = first_test_info->name();
-
-  // Info about the current test.
-  const TestInfo* const this_test_info = impl->current_test_info();
-  const internal::TypeId this_fixture_id = this_test_info->fixture_class_id_;
-  const char* const this_test_name = this_test_info->name();
-
-  if (this_fixture_id != first_fixture_id) {
-    // Is the first test defined using TEST?
-    const bool first_is_TEST = first_fixture_id == internal::GetTestTypeId();
-    // Is this test defined using TEST?
-    const bool this_is_TEST = this_fixture_id == internal::GetTestTypeId();
-
-    if (first_is_TEST || this_is_TEST) {
-      // Both TEST and TEST_F appear in same test suite, which is incorrect.
-      // Tell the user how to fix this.
-
-      // Gets the name of the TEST and the name of the TEST_F.  Note
-      // that first_is_TEST and this_is_TEST cannot both be true, as
-      // the fixture IDs are different for the two tests.
-      const char* const TEST_name =
-          first_is_TEST ? first_test_name : this_test_name;
-      const char* const TEST_F_name =
-          first_is_TEST ? this_test_name : first_test_name;
-
-      ADD_FAILURE()
-          << "All tests in the same test suite must use the same test fixture\n"
-          << "class, so mixing TEST_F and TEST in the same test suite is\n"
-          << "illegal.  In test suite " << this_test_info->test_suite_name()
-          << ",\n"
-          << "test " << TEST_F_name << " is defined using TEST_F but\n"
-          << "test " << TEST_name << " is defined using TEST.  You probably\n"
-          << "want to change the TEST to TEST_F or move it to another test\n"
-          << "case.";
-    } else {
-      // Two fixture classes with the same name appear in two different
-      // namespaces, which is not allowed. Tell the user how to fix this.
-      ADD_FAILURE()
-          << "All tests in the same test suite must use the same test fixture\n"
-          << "class.  However, in test suite "
-          << this_test_info->test_suite_name() << ",\n"
-          << "you defined test " << first_test_name << " and test "
-          << this_test_name << "\n"
-          << "using two different test fixture classes.  This can happen if\n"
-          << "the two classes are from different namespaces or translation\n"
-          << "units and have the same name.  You should probably rename one\n"
-          << "of the classes to put the tests into different test suites.";
-    }
-    return false;
-  }
-
-  return true;
-}
-
-#if GTEST_HAS_SEH
-
-// Adds an "exception thrown" fatal failure to the current test.  This
-// function returns its result via an output parameter pointer because VC++
-// prohibits creation of objects with destructors on stack in functions
-// using __try (see error C2712).
-static std::string* FormatSehExceptionMessage(DWORD exception_code,
-                                              const char* location) {
-  Message message;
-  message << "SEH exception with code 0x" << std::setbase(16) <<
-    exception_code << std::setbase(10) << " thrown in " << location << ".";
-
-  return new std::string(message.GetString());
-}
-
-#endif  // GTEST_HAS_SEH
-
-namespace internal {
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Adds an "exception thrown" fatal failure to the current test.
-static std::string FormatCxxExceptionMessage(const char* description,
-                                             const char* location) {
-  Message message;
-  if (description != nullptr) {
-    message << "C++ exception with description \"" << description << "\"";
-  } else {
-    message << "Unknown C++ exception";
-  }
-  message << " thrown in " << location << ".";
-
-  return message.GetString();
-}
-
-static std::string PrintTestPartResultToString(
-    const TestPartResult& test_part_result);
-
-GoogleTestFailureException::GoogleTestFailureException(
-    const TestPartResult& failure)
-    : ::std::runtime_error(PrintTestPartResultToString(failure).c_str()) {}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// We put these helper functions in the internal namespace as IBM's xlC
-// compiler rejects the code if they were declared static.
-
-// Runs the given method and handles SEH exceptions it throws, when
-// SEH is supported; returns the 0-value for type Result in case of an
-// SEH exception.  (Microsoft compilers cannot handle SEH and C++
-// exceptions in the same function.  Therefore, we provide a separate
-// wrapper function for handling SEH exceptions.)
-template <class T, typename Result>
-Result HandleSehExceptionsInMethodIfSupported(
-    T* object, Result (T::*method)(), const char* location) {
-#if GTEST_HAS_SEH
-  __try {
-    return (object->*method)();
-  } __except (internal::UnitTestOptions::GTestShouldProcessSEH(  // NOLINT
-      GetExceptionCode())) {
-    // We create the exception message on the heap because VC++ prohibits
-    // creation of objects with destructors on stack in functions using __try
-    // (see error C2712).
-    std::string* exception_message = FormatSehExceptionMessage(
-        GetExceptionCode(), location);
-    internal::ReportFailureInUnknownLocation(TestPartResult::kFatalFailure,
-                                             *exception_message);
-    delete exception_message;
-    return static_cast<Result>(0);
-  }
-#else
-  (void)location;
-  return (object->*method)();
-#endif  // GTEST_HAS_SEH
-}
-
-// Runs the given method and catches and reports C++ and/or SEH-style
-// exceptions, if they are supported; returns the 0-value for type
-// Result in case of an SEH exception.
-template <class T, typename Result>
-Result HandleExceptionsInMethodIfSupported(
-    T* object, Result (T::*method)(), const char* location) {
-  // NOTE: The user code can affect the way in which Google Test handles
-  // exceptions by setting GTEST_FLAG(catch_exceptions), but only before
-  // RUN_ALL_TESTS() starts. It is technically possible to check the flag
-  // after the exception is caught and either report or re-throw the
-  // exception based on the flag's value:
-  //
-  // try {
-  //   // Perform the test method.
-  // } catch (...) {
-  //   if (GTEST_FLAG(catch_exceptions))
-  //     // Report the exception as failure.
-  //   else
-  //     throw;  // Re-throws the original exception.
-  // }
-  //
-  // However, the purpose of this flag is to allow the program to drop into
-  // the debugger when the exception is thrown. On most platforms, once the
-  // control enters the catch block, the exception origin information is
-  // lost and the debugger will stop the program at the point of the
-  // re-throw in this function -- instead of at the point of the original
-  // throw statement in the code under test.  For this reason, we perform
-  // the check early, sacrificing the ability to affect Google Test's
-  // exception handling in the method where the exception is thrown.
-  if (internal::GetUnitTestImpl()->catch_exceptions()) {
-#if GTEST_HAS_EXCEPTIONS
-    try {
-      return HandleSehExceptionsInMethodIfSupported(object, method, location);
-    } catch (const AssertionException&) {  // NOLINT
-      // This failure was reported already.
-    } catch (const internal::GoogleTestFailureException&) {  // NOLINT
-      // This exception type can only be thrown by a failed Google
-      // Test assertion with the intention of letting another testing
-      // framework catch it.  Therefore we just re-throw it.
-      throw;
-    } catch (const std::exception& e) {  // NOLINT
-      internal::ReportFailureInUnknownLocation(
-          TestPartResult::kFatalFailure,
-          FormatCxxExceptionMessage(e.what(), location));
-    } catch (...) {  // NOLINT
-      internal::ReportFailureInUnknownLocation(
-          TestPartResult::kFatalFailure,
-          FormatCxxExceptionMessage(nullptr, location));
-    }
-    return static_cast<Result>(0);
-#else
-    return HandleSehExceptionsInMethodIfSupported(object, method, location);
-#endif  // GTEST_HAS_EXCEPTIONS
-  } else {
-    return (object->*method)();
-  }
-}
-
-}  // namespace internal
-
-// Runs the test and updates the test result.
-void Test::Run() {
-  if (!HasSameFixtureClass()) return;
-
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(this, &Test::SetUp, "SetUp()");
-  // We will run the test only if SetUp() was successful and didn't call
-  // GTEST_SKIP().
-  if (!HasFatalFailure() && !IsSkipped()) {
-    impl->os_stack_trace_getter()->UponLeavingGTest();
-    internal::HandleExceptionsInMethodIfSupported(
-        this, &Test::TestBody, "the test body");
-  }
-
-  // However, we want to clean up as much as possible.  Hence we will
-  // always call TearDown(), even if SetUp() or the test body has
-  // failed.
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(
-      this, &Test::TearDown, "TearDown()");
-}
-
-// Returns true if and only if the current test has a fatal failure.
-bool Test::HasFatalFailure() {
-  return internal::GetUnitTestImpl()->current_test_result()->HasFatalFailure();
-}
-
-// Returns true if and only if the current test has a non-fatal failure.
-bool Test::HasNonfatalFailure() {
-  return internal::GetUnitTestImpl()->current_test_result()->
-      HasNonfatalFailure();
-}
-
-// Returns true if and only if the current test was skipped.
-bool Test::IsSkipped() {
-  return internal::GetUnitTestImpl()->current_test_result()->Skipped();
-}
-
-// class TestInfo
-
-// Constructs a TestInfo object. It assumes ownership of the test factory
-// object.
-TestInfo::TestInfo(const std::string& a_test_suite_name,
-                   const std::string& a_name, const char* a_type_param,
-                   const char* a_value_param,
-                   internal::CodeLocation a_code_location,
-                   internal::TypeId fixture_class_id,
-                   internal::TestFactoryBase* factory)
-    : test_suite_name_(a_test_suite_name),
-      name_(a_name),
-      type_param_(a_type_param ? new std::string(a_type_param) : nullptr),
-      value_param_(a_value_param ? new std::string(a_value_param) : nullptr),
-      location_(a_code_location),
-      fixture_class_id_(fixture_class_id),
-      should_run_(false),
-      is_disabled_(false),
-      matches_filter_(false),
-      factory_(factory),
-      result_() {}
-
-// Destructs a TestInfo object.
-TestInfo::~TestInfo() { delete factory_; }
-
-namespace internal {
-
-// Creates a new TestInfo object and registers it with Google Test;
-// returns the created object.
-//
-// Arguments:
-//
-//   test_suite_name:   name of the test suite
-//   name:             name of the test
-//   type_param:       the name of the test's type parameter, or NULL if
-//                     this is not a typed or a type-parameterized test.
-//   value_param:      text representation of the test's value parameter,
-//                     or NULL if this is not a value-parameterized test.
-//   code_location:    code location where the test is defined
-//   fixture_class_id: ID of the test fixture class
-//   set_up_tc:        pointer to the function that sets up the test suite
-//   tear_down_tc:     pointer to the function that tears down the test suite
-//   factory:          pointer to the factory that creates a test object.
-//                     The newly created TestInfo instance will assume
-//                     ownership of the factory object.
-TestInfo* MakeAndRegisterTestInfo(
-    const char* test_suite_name, const char* name, const char* type_param,
-    const char* value_param, CodeLocation code_location,
-    TypeId fixture_class_id, SetUpTestSuiteFunc set_up_tc,
-    TearDownTestSuiteFunc tear_down_tc, TestFactoryBase* factory) {
-  TestInfo* const test_info =
-      new TestInfo(test_suite_name, name, type_param, value_param,
-                   code_location, fixture_class_id, factory);
-  GetUnitTestImpl()->AddTestInfo(set_up_tc, tear_down_tc, test_info);
-  return test_info;
-}
-
-void ReportInvalidTestSuiteType(const char* test_suite_name,
-                                CodeLocation code_location) {
-  Message errors;
-  errors
-      << "Attempted redefinition of test suite " << test_suite_name << ".\n"
-      << "All tests in the same test suite must use the same test fixture\n"
-      << "class.  However, in test suite " << test_suite_name << ", you tried\n"
-      << "to define a test using a fixture class different from the one\n"
-      << "used earlier. This can happen if the two fixture classes are\n"
-      << "from different namespaces and have the same name. You should\n"
-      << "probably rename one of the classes to put the tests into different\n"
-      << "test suites.";
-
-  GTEST_LOG_(ERROR) << FormatFileLocation(code_location.file.c_str(),
-                                          code_location.line)
-                    << " " << errors.GetString();
-}
-}  // namespace internal
-
-namespace {
-
-// A predicate that checks the test name of a TestInfo against a known
-// value.
-//
-// This is used for implementation of the TestSuite class only.  We put
-// it in the anonymous namespace to prevent polluting the outer
-// namespace.
-//
-// TestNameIs is copyable.
-class TestNameIs {
- public:
-  // Constructor.
-  //
-  // TestNameIs has NO default constructor.
-  explicit TestNameIs(const char* name)
-      : name_(name) {}
-
-  // Returns true if and only if the test name of test_info matches name_.
-  bool operator()(const TestInfo * test_info) const {
-    return test_info && test_info->name() == name_;
-  }
-
- private:
-  std::string name_;
-};
-
-}  // namespace
-
-namespace internal {
-
-// This method expands all parameterized tests registered with macros TEST_P
-// and INSTANTIATE_TEST_SUITE_P into regular tests and registers those.
-// This will be done just once during the program runtime.
-void UnitTestImpl::RegisterParameterizedTests() {
-  if (!parameterized_tests_registered_) {
-    parameterized_test_registry_.RegisterTests();
-    parameterized_tests_registered_ = true;
-  }
-}
-
-}  // namespace internal
-
-// Creates the test object, runs it, records its result, and then
-// deletes it.
-void TestInfo::Run() {
-  if (!should_run_) return;
-
-  // Tells UnitTest where to store test result.
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->set_current_test_info(this);
-
-  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
-
-  // Notifies the unit test event listeners that a test is about to start.
-  repeater->OnTestStart(*this);
-
-  const TimeInMillis start = internal::GetTimeInMillis();
-
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-
-  // Creates the test object.
-  Test* const test = internal::HandleExceptionsInMethodIfSupported(
-      factory_, &internal::TestFactoryBase::CreateTest,
-      "the test fixture's constructor");
-
-  // Runs the test if the constructor didn't generate a fatal failure or invoke
-  // GTEST_SKIP().
-  // Note that the object will not be null
-  if (!Test::HasFatalFailure() && !Test::IsSkipped()) {
-    // This doesn't throw as all user code that can throw are wrapped into
-    // exception handling code.
-    test->Run();
-  }
-
-  if (test != nullptr) {
-    // Deletes the test object.
-    impl->os_stack_trace_getter()->UponLeavingGTest();
-    internal::HandleExceptionsInMethodIfSupported(
-        test, &Test::DeleteSelf_, "the test fixture's destructor");
-  }
-
-  result_.set_start_timestamp(start);
-  result_.set_elapsed_time(internal::GetTimeInMillis() - start);
-
-  // Notifies the unit test event listener that a test has just finished.
-  repeater->OnTestEnd(*this);
-
-  // Tells UnitTest to stop associating assertion results to this
-  // test.
-  impl->set_current_test_info(nullptr);
-}
-
-// class TestSuite
-
-// Gets the number of successful tests in this test suite.
-int TestSuite::successful_test_count() const {
-  return CountIf(test_info_list_, TestPassed);
-}
-
-// Gets the number of successful tests in this test suite.
-int TestSuite::skipped_test_count() const {
-  return CountIf(test_info_list_, TestSkipped);
-}
-
-// Gets the number of failed tests in this test suite.
-int TestSuite::failed_test_count() const {
-  return CountIf(test_info_list_, TestFailed);
-}
-
-// Gets the number of disabled tests that will be reported in the XML report.
-int TestSuite::reportable_disabled_test_count() const {
-  return CountIf(test_info_list_, TestReportableDisabled);
-}
-
-// Gets the number of disabled tests in this test suite.
-int TestSuite::disabled_test_count() const {
-  return CountIf(test_info_list_, TestDisabled);
-}
-
-// Gets the number of tests to be printed in the XML report.
-int TestSuite::reportable_test_count() const {
-  return CountIf(test_info_list_, TestReportable);
-}
-
-// Get the number of tests in this test suite that should run.
-int TestSuite::test_to_run_count() const {
-  return CountIf(test_info_list_, ShouldRunTest);
-}
-
-// Gets the number of all tests.
-int TestSuite::total_test_count() const {
-  return static_cast<int>(test_info_list_.size());
-}
-
-// Creates a TestSuite with the given name.
-//
-// Arguments:
-//
-//   name:         name of the test suite
-//   a_type_param: the name of the test suite's type parameter, or NULL if
-//                 this is not a typed or a type-parameterized test suite.
-//   set_up_tc:    pointer to the function that sets up the test suite
-//   tear_down_tc: pointer to the function that tears down the test suite
-TestSuite::TestSuite(const char* a_name, const char* a_type_param,
-                     internal::SetUpTestSuiteFunc set_up_tc,
-                     internal::TearDownTestSuiteFunc tear_down_tc)
-    : name_(a_name),
-      type_param_(a_type_param ? new std::string(a_type_param) : nullptr),
-      set_up_tc_(set_up_tc),
-      tear_down_tc_(tear_down_tc),
-      should_run_(false),
-      start_timestamp_(0),
-      elapsed_time_(0) {}
-
-// Destructor of TestSuite.
-TestSuite::~TestSuite() {
-  // Deletes every Test in the collection.
-  ForEach(test_info_list_, internal::Delete<TestInfo>);
-}
-
-// Returns the i-th test among all the tests. i can range from 0 to
-// total_test_count() - 1. If i is not in that range, returns NULL.
-const TestInfo* TestSuite::GetTestInfo(int i) const {
-  const int index = GetElementOr(test_indices_, i, -1);
-  return index < 0 ? nullptr : test_info_list_[static_cast<size_t>(index)];
-}
-
-// Returns the i-th test among all the tests. i can range from 0 to
-// total_test_count() - 1. If i is not in that range, returns NULL.
-TestInfo* TestSuite::GetMutableTestInfo(int i) {
-  const int index = GetElementOr(test_indices_, i, -1);
-  return index < 0 ? nullptr : test_info_list_[static_cast<size_t>(index)];
-}
-
-// Adds a test to this test suite.  Will delete the test upon
-// destruction of the TestSuite object.
-void TestSuite::AddTestInfo(TestInfo* test_info) {
-  test_info_list_.push_back(test_info);
-  test_indices_.push_back(static_cast<int>(test_indices_.size()));
-}
-
-// Runs every test in this TestSuite.
-void TestSuite::Run() {
-  if (!should_run_) return;
-
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->set_current_test_suite(this);
-
-  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
-
-  // Call both legacy and the new API
-  repeater->OnTestSuiteStart(*this);
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI
-  repeater->OnTestCaseStart(*this);
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI
-
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(
-      this, &TestSuite::RunSetUpTestSuite, "SetUpTestSuite()");
-
-  start_timestamp_ = internal::GetTimeInMillis();
-  for (int i = 0; i < total_test_count(); i++) {
-    GetMutableTestInfo(i)->Run();
-  }
-  elapsed_time_ = internal::GetTimeInMillis() - start_timestamp_;
-
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(
-      this, &TestSuite::RunTearDownTestSuite, "TearDownTestSuite()");
-
-  // Call both legacy and the new API
-  repeater->OnTestSuiteEnd(*this);
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI
-  repeater->OnTestCaseEnd(*this);
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI
-
-  impl->set_current_test_suite(nullptr);
-}
-
-// Clears the results of all tests in this test suite.
-void TestSuite::ClearResult() {
-  ad_hoc_test_result_.Clear();
-  ForEach(test_info_list_, TestInfo::ClearTestResult);
-}
-
-// Shuffles the tests in this test suite.
-void TestSuite::ShuffleTests(internal::Random* random) {
-  Shuffle(random, &test_indices_);
-}
-
-// Restores the test order to before the first shuffle.
-void TestSuite::UnshuffleTests() {
-  for (size_t i = 0; i < test_indices_.size(); i++) {
-    test_indices_[i] = static_cast<int>(i);
-  }
-}
-
-// Formats a countable noun.  Depending on its quantity, either the
-// singular form or the plural form is used. e.g.
-//
-// FormatCountableNoun(1, "formula", "formuli") returns "1 formula".
-// FormatCountableNoun(5, "book", "books") returns "5 books".
-static std::string FormatCountableNoun(int count,
-                                       const char * singular_form,
-                                       const char * plural_form) {
-  return internal::StreamableToString(count) + " " +
-      (count == 1 ? singular_form : plural_form);
-}
-
-// Formats the count of tests.
-static std::string FormatTestCount(int test_count) {
-  return FormatCountableNoun(test_count, "test", "tests");
-}
-
-// Formats the count of test suites.
-static std::string FormatTestSuiteCount(int test_suite_count) {
-  return FormatCountableNoun(test_suite_count, "test suite", "test suites");
-}
-
-// Converts a TestPartResult::Type enum to human-friendly string
-// representation.  Both kNonFatalFailure and kFatalFailure are translated
-// to "Failure", as the user usually doesn't care about the difference
-// between the two when viewing the test result.
-static const char * TestPartResultTypeToString(TestPartResult::Type type) {
-  switch (type) {
-    case TestPartResult::kSkip:
-      return "Skipped";
-    case TestPartResult::kSuccess:
-      return "Success";
-
-    case TestPartResult::kNonFatalFailure:
-    case TestPartResult::kFatalFailure:
-#ifdef _MSC_VER
-      return "error: ";
-#else
-      return "Failure\n";
-#endif
-    default:
-      return "Unknown result type";
-  }
-}
-
-namespace internal {
-
-// Prints a TestPartResult to an std::string.
-static std::string PrintTestPartResultToString(
-    const TestPartResult& test_part_result) {
-  return (Message()
-          << internal::FormatFileLocation(test_part_result.file_name(),
-                                          test_part_result.line_number())
-          << " " << TestPartResultTypeToString(test_part_result.type())
-          << test_part_result.message()).GetString();
-}
-
-// Prints a TestPartResult.
-static void PrintTestPartResult(const TestPartResult& test_part_result) {
-  const std::string& result =
-      PrintTestPartResultToString(test_part_result);
-  printf("%s\n", result.c_str());
-  fflush(stdout);
-  // If the test program runs in Visual Studio or a debugger, the
-  // following statements add the test part result message to the Output
-  // window such that the user can double-click on it to jump to the
-  // corresponding source code location; otherwise they do nothing.
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
-  // We don't call OutputDebugString*() on Windows Mobile, as printing
-  // to stdout is done by OutputDebugString() there already - we don't
-  // want the same message printed twice.
-  ::OutputDebugStringA(result.c_str());
-  ::OutputDebugStringA("\n");
-#endif
-}
-
-// class PrettyUnitTestResultPrinter
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
-    !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT && !GTEST_OS_WINDOWS_MINGW
-
-// Returns the character attribute for the given color.
-static WORD GetColorAttribute(GTestColor color) {
-  switch (color) {
-    case COLOR_RED:    return FOREGROUND_RED;
-    case COLOR_GREEN:  return FOREGROUND_GREEN;
-    case COLOR_YELLOW: return FOREGROUND_RED | FOREGROUND_GREEN;
-    default:           return 0;
-  }
-}
-
-static int GetBitOffset(WORD color_mask) {
-  if (color_mask == 0) return 0;
-
-  int bitOffset = 0;
-  while ((color_mask & 1) == 0) {
-    color_mask >>= 1;
-    ++bitOffset;
-  }
-  return bitOffset;
-}
-
-static WORD GetNewColor(GTestColor color, WORD old_color_attrs) {
-  // Let's reuse the BG
-  static const WORD background_mask = BACKGROUND_BLUE | BACKGROUND_GREEN |
-                                      BACKGROUND_RED | BACKGROUND_INTENSITY;
-  static const WORD foreground_mask = FOREGROUND_BLUE | FOREGROUND_GREEN |
-                                      FOREGROUND_RED | FOREGROUND_INTENSITY;
-  const WORD existing_bg = old_color_attrs & background_mask;
-
-  WORD new_color =
-      GetColorAttribute(color) | existing_bg | FOREGROUND_INTENSITY;
-  static const int bg_bitOffset = GetBitOffset(background_mask);
-  static const int fg_bitOffset = GetBitOffset(foreground_mask);
-
-  if (((new_color & background_mask) >> bg_bitOffset) ==
-      ((new_color & foreground_mask) >> fg_bitOffset)) {
-    new_color ^= FOREGROUND_INTENSITY;  // invert intensity
-  }
-  return new_color;
-}
-
-#else
-
-// Returns the ANSI color code for the given color.  COLOR_DEFAULT is
-// an invalid input.
-static const char* GetAnsiColorCode(GTestColor color) {
-  switch (color) {
-    case COLOR_RED:     return "1";
-    case COLOR_GREEN:   return "2";
-    case COLOR_YELLOW:  return "3";
-    default:
-      return nullptr;
-  }
-}
-
-#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
-
-// Returns true if and only if Google Test should use colors in the output.
-bool ShouldUseColor(bool stdout_is_tty) {
-  const char* const gtest_color = GTEST_FLAG(color).c_str();
-
-  if (String::CaseInsensitiveCStringEquals(gtest_color, "auto")) {
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
-    // On Windows the TERM variable is usually not set, but the
-    // console there does support colors.
-    return stdout_is_tty;
-#else
-    // On non-Windows platforms, we rely on the TERM variable.
-    const char* const term = posix::GetEnv("TERM");
-    const bool term_supports_color =
-        String::CStringEquals(term, "xterm") ||
-        String::CStringEquals(term, "xterm-color") ||
-        String::CStringEquals(term, "xterm-256color") ||
-        String::CStringEquals(term, "screen") ||
-        String::CStringEquals(term, "screen-256color") ||
-        String::CStringEquals(term, "tmux") ||
-        String::CStringEquals(term, "tmux-256color") ||
-        String::CStringEquals(term, "rxvt-unicode") ||
-        String::CStringEquals(term, "rxvt-unicode-256color") ||
-        String::CStringEquals(term, "linux") ||
-        String::CStringEquals(term, "cygwin");
-    return stdout_is_tty && term_supports_color;
-#endif  // GTEST_OS_WINDOWS
-  }
-
-  return String::CaseInsensitiveCStringEquals(gtest_color, "yes") ||
-      String::CaseInsensitiveCStringEquals(gtest_color, "true") ||
-      String::CaseInsensitiveCStringEquals(gtest_color, "t") ||
-      String::CStringEquals(gtest_color, "1");
-  // We take "yes", "true", "t", and "1" as meaning "yes".  If the
-  // value is neither one of these nor "auto", we treat it as "no" to
-  // be conservative.
-}
-
-// Helpers for printing colored strings to stdout. Note that on Windows, we
-// cannot simply emit special characters and have the terminal change colors.
-// This routine must actually emit the characters rather than return a string
-// that would be colored when printed, as can be done on Linux.
-void ColoredPrintf(GTestColor color, const char* fmt, ...) {
-  va_list args;
-  va_start(args, fmt);
-
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_ZOS || GTEST_OS_IOS || \
-    GTEST_OS_WINDOWS_PHONE || GTEST_OS_WINDOWS_RT || defined(ESP_PLATFORM)
-  const bool use_color = AlwaysFalse();
-#else
-  static const bool in_color_mode =
-      ShouldUseColor(posix::IsATTY(posix::FileNo(stdout)) != 0);
-  const bool use_color = in_color_mode && (color != COLOR_DEFAULT);
-#endif  // GTEST_OS_WINDOWS_MOBILE || GTEST_OS_ZOS
-
-  if (!use_color) {
-    vprintf(fmt, args);
-    va_end(args);
-    return;
-  }
-
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
-    !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT && !GTEST_OS_WINDOWS_MINGW
-  const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
-
-  // Gets the current text color.
-  CONSOLE_SCREEN_BUFFER_INFO buffer_info;
-  GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
-  const WORD old_color_attrs = buffer_info.wAttributes;
-  const WORD new_color = GetNewColor(color, old_color_attrs);
-
-  // We need to flush the stream buffers into the console before each
-  // SetConsoleTextAttribute call lest it affect the text that is already
-  // printed but has not yet reached the console.
-  fflush(stdout);
-  SetConsoleTextAttribute(stdout_handle, new_color);
-
-  vprintf(fmt, args);
-
-  fflush(stdout);
-  // Restores the text color.
-  SetConsoleTextAttribute(stdout_handle, old_color_attrs);
-#else
-  printf("\033[0;3%sm", GetAnsiColorCode(color));
-  vprintf(fmt, args);
-  printf("\033[m");  // Resets the terminal to default.
-#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
-  va_end(args);
-}
-
-// Text printed in Google Test's text output and --gtest_list_tests
-// output to label the type parameter and value parameter for a test.
-static const char kTypeParamLabel[] = "TypeParam";
-static const char kValueParamLabel[] = "GetParam()";
-
-static void PrintFullTestCommentIfPresent(const TestInfo& test_info) {
-  const char* const type_param = test_info.type_param();
-  const char* const value_param = test_info.value_param();
-
-  if (type_param != nullptr || value_param != nullptr) {
-    printf(", where ");
-    if (type_param != nullptr) {
-      printf("%s = %s", kTypeParamLabel, type_param);
-      if (value_param != nullptr) printf(" and ");
-    }
-    if (value_param != nullptr) {
-      printf("%s = %s", kValueParamLabel, value_param);
-    }
-  }
-}
-
-// This class implements the TestEventListener interface.
-//
-// Class PrettyUnitTestResultPrinter is copyable.
-class PrettyUnitTestResultPrinter : public TestEventListener {
- public:
-  PrettyUnitTestResultPrinter() {}
-  static void PrintTestName(const char* test_suite, const char* test) {
-    printf("%s.%s", test_suite, test);
-  }
-
-  // The following methods override what's in the TestEventListener class.
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationStart(const UnitTest& unit_test, int iteration) override;
-  void OnEnvironmentsSetUpStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestCase& test_case) override;
-#else
-  void OnTestSuiteStart(const TestSuite& test_suite) override;
-#endif  // OnTestCaseStart
-
-  void OnTestStart(const TestInfo& test_info) override;
-
-  void OnTestPartResult(const TestPartResult& result) override;
-  void OnTestEnd(const TestInfo& test_info) override;
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& test_case) override;
-#else
-  void OnTestSuiteEnd(const TestSuite& test_suite) override;
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnEnvironmentsTearDownStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
-
- private:
-  static void PrintFailedTests(const UnitTest& unit_test);
-  static void PrintSkippedTests(const UnitTest& unit_test);
-};
-
-  // Fired before each iteration of tests starts.
-void PrettyUnitTestResultPrinter::OnTestIterationStart(
-    const UnitTest& unit_test, int iteration) {
-  if (GTEST_FLAG(repeat) != 1)
-    printf("\nRepeating all tests (iteration %d) . . .\n\n", iteration + 1);
-
-  const char* const filter = GTEST_FLAG(filter).c_str();
-
-  // Prints the filter if it's not *.  This reminds the user that some
-  // tests may be skipped.
-  if (!String::CStringEquals(filter, kUniversalFilter)) {
-    ColoredPrintf(COLOR_YELLOW,
-                  "Note: %s filter = %s\n", GTEST_NAME_, filter);
-  }
-
-  if (internal::ShouldShard(kTestTotalShards, kTestShardIndex, false)) {
-    const Int32 shard_index = Int32FromEnvOrDie(kTestShardIndex, -1);
-    ColoredPrintf(COLOR_YELLOW,
-                  "Note: This is test shard %d of %s.\n",
-                  static_cast<int>(shard_index) + 1,
-                  internal::posix::GetEnv(kTestTotalShards));
-  }
-
-  if (GTEST_FLAG(shuffle)) {
-    ColoredPrintf(COLOR_YELLOW,
-                  "Note: Randomizing tests' orders with a seed of %d .\n",
-                  unit_test.random_seed());
-  }
-
-  ColoredPrintf(COLOR_GREEN,  "[==========] ");
-  printf("Running %s from %s.\n",
-         FormatTestCount(unit_test.test_to_run_count()).c_str(),
-         FormatTestSuiteCount(unit_test.test_suite_to_run_count()).c_str());
-  fflush(stdout);
-}
-
-void PrettyUnitTestResultPrinter::OnEnvironmentsSetUpStart(
-    const UnitTest& /*unit_test*/) {
-  ColoredPrintf(COLOR_GREEN,  "[----------] ");
-  printf("Global test environment set-up.\n");
-  fflush(stdout);
-}
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-void PrettyUnitTestResultPrinter::OnTestCaseStart(const TestCase& test_case) {
-  const std::string counts =
-      FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
-  ColoredPrintf(COLOR_GREEN, "[----------] ");
-  printf("%s from %s", counts.c_str(), test_case.name());
-  if (test_case.type_param() == nullptr) {
-    printf("\n");
-  } else {
-    printf(", where %s = %s\n", kTypeParamLabel, test_case.type_param());
-  }
-  fflush(stdout);
-}
-#else
-void PrettyUnitTestResultPrinter::OnTestSuiteStart(
-    const TestSuite& test_suite) {
-  const std::string counts =
-      FormatCountableNoun(test_suite.test_to_run_count(), "test", "tests");
-  ColoredPrintf(COLOR_GREEN, "[----------] ");
-  printf("%s from %s", counts.c_str(), test_suite.name());
-  if (test_suite.type_param() == nullptr) {
-    printf("\n");
-  } else {
-    printf(", where %s = %s\n", kTypeParamLabel, test_suite.type_param());
-  }
-  fflush(stdout);
-}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-void PrettyUnitTestResultPrinter::OnTestStart(const TestInfo& test_info) {
-  ColoredPrintf(COLOR_GREEN,  "[ RUN      ] ");
-  PrintTestName(test_info.test_suite_name(), test_info.name());
-  printf("\n");
-  fflush(stdout);
-}
-
-// Called after an assertion failure.
-void PrettyUnitTestResultPrinter::OnTestPartResult(
-    const TestPartResult& result) {
-  switch (result.type()) {
-    // If the test part succeeded, or was skipped,
-    // we don't need to do anything.
-    case TestPartResult::kSkip:
-    case TestPartResult::kSuccess:
-      return;
-    default:
-      // Print failure message from the assertion
-      // (e.g. expected this and got that).
-      PrintTestPartResult(result);
-      fflush(stdout);
-  }
-}
-
-void PrettyUnitTestResultPrinter::OnTestEnd(const TestInfo& test_info) {
-  if (test_info.result()->Passed()) {
-    ColoredPrintf(COLOR_GREEN, "[       OK ] ");
-  } else if (test_info.result()->Skipped()) {
-    ColoredPrintf(COLOR_GREEN, "[  SKIPPED ] ");
-  } else {
-    ColoredPrintf(COLOR_RED, "[  FAILED  ] ");
-  }
-  PrintTestName(test_info.test_suite_name(), test_info.name());
-  if (test_info.result()->Failed())
-    PrintFullTestCommentIfPresent(test_info);
-
-  if (GTEST_FLAG(print_time)) {
-    printf(" (%s ms)\n", internal::StreamableToString(
-           test_info.result()->elapsed_time()).c_str());
-  } else {
-    printf("\n");
-  }
-  fflush(stdout);
-}
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-void PrettyUnitTestResultPrinter::OnTestCaseEnd(const TestCase& test_case) {
-  if (!GTEST_FLAG(print_time)) return;
-
-  const std::string counts =
-      FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
-  ColoredPrintf(COLOR_GREEN, "[----------] ");
-  printf("%s from %s (%s ms total)\n\n", counts.c_str(), test_case.name(),
-         internal::StreamableToString(test_case.elapsed_time()).c_str());
-  fflush(stdout);
-}
-#else
-void PrettyUnitTestResultPrinter::OnTestSuiteEnd(const TestSuite& test_suite) {
-  if (!GTEST_FLAG(print_time)) return;
-
-  const std::string counts =
-      FormatCountableNoun(test_suite.test_to_run_count(), "test", "tests");
-  ColoredPrintf(COLOR_GREEN, "[----------] ");
-  printf("%s from %s (%s ms total)\n\n", counts.c_str(), test_suite.name(),
-         internal::StreamableToString(test_suite.elapsed_time()).c_str());
-  fflush(stdout);
-}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-void PrettyUnitTestResultPrinter::OnEnvironmentsTearDownStart(
-    const UnitTest& /*unit_test*/) {
-  ColoredPrintf(COLOR_GREEN,  "[----------] ");
-  printf("Global test environment tear-down\n");
-  fflush(stdout);
-}
-
-// Internal helper for printing the list of failed tests.
-void PrettyUnitTestResultPrinter::PrintFailedTests(const UnitTest& unit_test) {
-  const int failed_test_count = unit_test.failed_test_count();
-  if (failed_test_count == 0) {
-    return;
-  }
-
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    const TestSuite& test_suite = *unit_test.GetTestSuite(i);
-    if (!test_suite.should_run() || (test_suite.failed_test_count() == 0)) {
-      continue;
-    }
-    for (int j = 0; j < test_suite.total_test_count(); ++j) {
-      const TestInfo& test_info = *test_suite.GetTestInfo(j);
-      if (!test_info.should_run() || !test_info.result()->Failed()) {
-        continue;
-      }
-      ColoredPrintf(COLOR_RED, "[  FAILED  ] ");
-      printf("%s.%s", test_suite.name(), test_info.name());
-      PrintFullTestCommentIfPresent(test_info);
-      printf("\n");
-    }
-  }
-}
-
-// Internal helper for printing the list of skipped tests.
-void PrettyUnitTestResultPrinter::PrintSkippedTests(const UnitTest& unit_test) {
-  const int skipped_test_count = unit_test.skipped_test_count();
-  if (skipped_test_count == 0) {
-    return;
-  }
-
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    const TestSuite& test_suite = *unit_test.GetTestSuite(i);
-    if (!test_suite.should_run() || (test_suite.skipped_test_count() == 0)) {
-      continue;
-    }
-    for (int j = 0; j < test_suite.total_test_count(); ++j) {
-      const TestInfo& test_info = *test_suite.GetTestInfo(j);
-      if (!test_info.should_run() || !test_info.result()->Skipped()) {
-        continue;
-      }
-      ColoredPrintf(COLOR_GREEN, "[  SKIPPED ] ");
-      printf("%s.%s", test_suite.name(), test_info.name());
-      printf("\n");
-    }
-  }
-}
-
-void PrettyUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                     int /*iteration*/) {
-  ColoredPrintf(COLOR_GREEN,  "[==========] ");
-  printf("%s from %s ran.",
-         FormatTestCount(unit_test.test_to_run_count()).c_str(),
-         FormatTestSuiteCount(unit_test.test_suite_to_run_count()).c_str());
-  if (GTEST_FLAG(print_time)) {
-    printf(" (%s ms total)",
-           internal::StreamableToString(unit_test.elapsed_time()).c_str());
-  }
-  printf("\n");
-  ColoredPrintf(COLOR_GREEN,  "[  PASSED  ] ");
-  printf("%s.\n", FormatTestCount(unit_test.successful_test_count()).c_str());
-
-  const int skipped_test_count = unit_test.skipped_test_count();
-  if (skipped_test_count > 0) {
-    ColoredPrintf(COLOR_GREEN, "[  SKIPPED ] ");
-    printf("%s, listed below:\n", FormatTestCount(skipped_test_count).c_str());
-    PrintSkippedTests(unit_test);
-  }
-
-  int num_failures = unit_test.failed_test_count();
-  if (!unit_test.Passed()) {
-    const int failed_test_count = unit_test.failed_test_count();
-    ColoredPrintf(COLOR_RED,  "[  FAILED  ] ");
-    printf("%s, listed below:\n", FormatTestCount(failed_test_count).c_str());
-    PrintFailedTests(unit_test);
-    printf("\n%2d FAILED %s\n", num_failures,
-                        num_failures == 1 ? "TEST" : "TESTS");
-  }
-
-  int num_disabled = unit_test.reportable_disabled_test_count();
-  if (num_disabled && !GTEST_FLAG(also_run_disabled_tests)) {
-    if (!num_failures) {
-      printf("\n");  // Add a spacer if no FAILURE banner is displayed.
-    }
-    ColoredPrintf(COLOR_YELLOW,
-                  "  YOU HAVE %d DISABLED %s\n\n",
-                  num_disabled,
-                  num_disabled == 1 ? "TEST" : "TESTS");
-  }
-  // Ensure that Google Test output is printed before, e.g., heapchecker output.
-  fflush(stdout);
-}
-
-// End PrettyUnitTestResultPrinter
-
-// class TestEventRepeater
-//
-// This class forwards events to other event listeners.
-class TestEventRepeater : public TestEventListener {
- public:
-  TestEventRepeater() : forwarding_enabled_(true) {}
-  ~TestEventRepeater() override;
-  void Append(TestEventListener *listener);
-  TestEventListener* Release(TestEventListener* listener);
-
-  // Controls whether events will be forwarded to listeners_. Set to false
-  // in death test child processes.
-  bool forwarding_enabled() const { return forwarding_enabled_; }
-  void set_forwarding_enabled(bool enable) { forwarding_enabled_ = enable; }
-
-  void OnTestProgramStart(const UnitTest& unit_test) override;
-  void OnTestIterationStart(const UnitTest& unit_test, int iteration) override;
-  void OnEnvironmentsSetUpStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsSetUpEnd(const UnitTest& unit_test) override;
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestSuite& parameter) override;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestSuiteStart(const TestSuite& parameter) override;
-  void OnTestStart(const TestInfo& test_info) override;
-  void OnTestPartResult(const TestPartResult& result) override;
-  void OnTestEnd(const TestInfo& test_info) override;
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& parameter) override;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestSuiteEnd(const TestSuite& parameter) override;
-  void OnEnvironmentsTearDownStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsTearDownEnd(const UnitTest& unit_test) override;
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void OnTestProgramEnd(const UnitTest& unit_test) override;
-
- private:
-  // Controls whether events will be forwarded to listeners_. Set to false
-  // in death test child processes.
-  bool forwarding_enabled_;
-  // The list of listeners that receive events.
-  std::vector<TestEventListener*> listeners_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventRepeater);
-};
-
-TestEventRepeater::~TestEventRepeater() {
-  ForEach(listeners_, Delete<TestEventListener>);
-}
-
-void TestEventRepeater::Append(TestEventListener *listener) {
-  listeners_.push_back(listener);
-}
-
-TestEventListener* TestEventRepeater::Release(TestEventListener *listener) {
-  for (size_t i = 0; i < listeners_.size(); ++i) {
-    if (listeners_[i] == listener) {
-      listeners_.erase(listeners_.begin() + static_cast<int>(i));
-      return listener;
-    }
-  }
-
-  return nullptr;
-}
-
-// Since most methods are very similar, use macros to reduce boilerplate.
-// This defines a member that forwards the call to all listeners.
-#define GTEST_REPEATER_METHOD_(Name, Type) \
-void TestEventRepeater::Name(const Type& parameter) { \
-  if (forwarding_enabled_) { \
-    for (size_t i = 0; i < listeners_.size(); i++) { \
-      listeners_[i]->Name(parameter); \
-    } \
-  } \
-}
-// This defines a member that forwards the call to all listeners in reverse
-// order.
-#define GTEST_REVERSE_REPEATER_METHOD_(Name, Type)      \
-  void TestEventRepeater::Name(const Type& parameter) { \
-    if (forwarding_enabled_) {                          \
-      for (size_t i = listeners_.size(); i != 0; i--) { \
-        listeners_[i - 1]->Name(parameter);             \
-      }                                                 \
-    }                                                   \
-  }
-
-GTEST_REPEATER_METHOD_(OnTestProgramStart, UnitTest)
-GTEST_REPEATER_METHOD_(OnEnvironmentsSetUpStart, UnitTest)
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REPEATER_METHOD_(OnTestCaseStart, TestSuite)
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REPEATER_METHOD_(OnTestSuiteStart, TestSuite)
-GTEST_REPEATER_METHOD_(OnTestStart, TestInfo)
-GTEST_REPEATER_METHOD_(OnTestPartResult, TestPartResult)
-GTEST_REPEATER_METHOD_(OnEnvironmentsTearDownStart, UnitTest)
-GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsSetUpEnd, UnitTest)
-GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsTearDownEnd, UnitTest)
-GTEST_REVERSE_REPEATER_METHOD_(OnTestEnd, TestInfo)
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REVERSE_REPEATER_METHOD_(OnTestCaseEnd, TestSuite)
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REVERSE_REPEATER_METHOD_(OnTestSuiteEnd, TestSuite)
-GTEST_REVERSE_REPEATER_METHOD_(OnTestProgramEnd, UnitTest)
-
-#undef GTEST_REPEATER_METHOD_
-#undef GTEST_REVERSE_REPEATER_METHOD_
-
-void TestEventRepeater::OnTestIterationStart(const UnitTest& unit_test,
-                                             int iteration) {
-  if (forwarding_enabled_) {
-    for (size_t i = 0; i < listeners_.size(); i++) {
-      listeners_[i]->OnTestIterationStart(unit_test, iteration);
-    }
-  }
-}
-
-void TestEventRepeater::OnTestIterationEnd(const UnitTest& unit_test,
-                                           int iteration) {
-  if (forwarding_enabled_) {
-    for (size_t i = listeners_.size(); i > 0; i--) {
-      listeners_[i - 1]->OnTestIterationEnd(unit_test, iteration);
-    }
-  }
-}
-
-// End TestEventRepeater
-
-// This class generates an XML output file.
-class XmlUnitTestResultPrinter : public EmptyTestEventListener {
- public:
-  explicit XmlUnitTestResultPrinter(const char* output_file);
-
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void ListTestsMatchingFilter(const std::vector<TestSuite*>& test_suites);
-
-  // Prints an XML summary of all unit tests.
-  static void PrintXmlTestsList(std::ostream* stream,
-                                const std::vector<TestSuite*>& test_suites);
-
- private:
-  // Is c a whitespace character that is normalized to a space character
-  // when it appears in an XML attribute value?
-  static bool IsNormalizableWhitespace(char c) {
-    return c == 0x9 || c == 0xA || c == 0xD;
-  }
-
-  // May c appear in a well-formed XML document?
-  static bool IsValidXmlCharacter(char c) {
-    return IsNormalizableWhitespace(c) || c >= 0x20;
-  }
-
-  // Returns an XML-escaped copy of the input string str.  If
-  // is_attribute is true, the text is meant to appear as an attribute
-  // value, and normalizable whitespace is preserved by replacing it
-  // with character references.
-  static std::string EscapeXml(const std::string& str, bool is_attribute);
-
-  // Returns the given string with all characters invalid in XML removed.
-  static std::string RemoveInvalidXmlCharacters(const std::string& str);
-
-  // Convenience wrapper around EscapeXml when str is an attribute value.
-  static std::string EscapeXmlAttribute(const std::string& str) {
-    return EscapeXml(str, true);
-  }
-
-  // Convenience wrapper around EscapeXml when str is not an attribute value.
-  static std::string EscapeXmlText(const char* str) {
-    return EscapeXml(str, false);
-  }
-
-  // Verifies that the given attribute belongs to the given element and
-  // streams the attribute as XML.
-  static void OutputXmlAttribute(std::ostream* stream,
-                                 const std::string& element_name,
-                                 const std::string& name,
-                                 const std::string& value);
-
-  // Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
-  static void OutputXmlCDataSection(::std::ostream* stream, const char* data);
-
-  // Streams an XML representation of a TestInfo object.
-  static void OutputXmlTestInfo(::std::ostream* stream,
-                                const char* test_suite_name,
-                                const TestInfo& test_info);
-
-  // Prints an XML representation of a TestSuite object
-  static void PrintXmlTestSuite(::std::ostream* stream,
-                                const TestSuite& test_suite);
-
-  // Prints an XML summary of unit_test to output stream out.
-  static void PrintXmlUnitTest(::std::ostream* stream,
-                               const UnitTest& unit_test);
-
-  // Produces a string representing the test properties in a result as space
-  // delimited XML attributes based on the property key="value" pairs.
-  // When the std::string is not empty, it includes a space at the beginning,
-  // to delimit this attribute from prior attributes.
-  static std::string TestPropertiesAsXmlAttributes(const TestResult& result);
-
-  // Streams an XML representation of the test properties of a TestResult
-  // object.
-  static void OutputXmlTestProperties(std::ostream* stream,
-                                      const TestResult& result);
-
-  // The output file.
-  const std::string output_file_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(XmlUnitTestResultPrinter);
-};
-
-// Creates a new XmlUnitTestResultPrinter.
-XmlUnitTestResultPrinter::XmlUnitTestResultPrinter(const char* output_file)
-    : output_file_(output_file) {
-  if (output_file_.empty()) {
-    GTEST_LOG_(FATAL) << "XML output file may not be null";
-  }
-}
-
-// Called after the unit test ends.
-void XmlUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                  int /*iteration*/) {
-  FILE* xmlout = OpenFileForWriting(output_file_);
-  std::stringstream stream;
-  PrintXmlUnitTest(&stream, unit_test);
-  fprintf(xmlout, "%s", StringStreamToString(&stream).c_str());
-  fclose(xmlout);
-}
-
-void XmlUnitTestResultPrinter::ListTestsMatchingFilter(
-    const std::vector<TestSuite*>& test_suites) {
-  FILE* xmlout = OpenFileForWriting(output_file_);
-  std::stringstream stream;
-  PrintXmlTestsList(&stream, test_suites);
-  fprintf(xmlout, "%s", StringStreamToString(&stream).c_str());
-  fclose(xmlout);
-}
-
-// Returns an XML-escaped copy of the input string str.  If is_attribute
-// is true, the text is meant to appear as an attribute value, and
-// normalizable whitespace is preserved by replacing it with character
-// references.
-//
-// Invalid XML characters in str, if any, are stripped from the output.
-// It is expected that most, if not all, of the text processed by this
-// module will consist of ordinary English text.
-// If this module is ever modified to produce version 1.1 XML output,
-// most invalid characters can be retained using character references.
-std::string XmlUnitTestResultPrinter::EscapeXml(
-    const std::string& str, bool is_attribute) {
-  Message m;
-
-  for (size_t i = 0; i < str.size(); ++i) {
-    const char ch = str[i];
-    switch (ch) {
-      case '<':
-        m << "&lt;";
-        break;
-      case '>':
-        m << "&gt;";
-        break;
-      case '&':
-        m << "&amp;";
-        break;
-      case '\'':
-        if (is_attribute)
-          m << "&apos;";
-        else
-          m << '\'';
-        break;
-      case '"':
-        if (is_attribute)
-          m << "&quot;";
-        else
-          m << '"';
-        break;
-      default:
-        if (IsValidXmlCharacter(ch)) {
-          if (is_attribute && IsNormalizableWhitespace(ch))
-            m << "&#x" << String::FormatByte(static_cast<unsigned char>(ch))
-              << ";";
-          else
-            m << ch;
-        }
-        break;
-    }
-  }
-
-  return m.GetString();
-}
-
-// Returns the given string with all characters invalid in XML removed.
-// Currently invalid characters are dropped from the string. An
-// alternative is to replace them with certain characters such as . or ?.
-std::string XmlUnitTestResultPrinter::RemoveInvalidXmlCharacters(
-    const std::string& str) {
-  std::string output;
-  output.reserve(str.size());
-  for (std::string::const_iterator it = str.begin(); it != str.end(); ++it)
-    if (IsValidXmlCharacter(*it))
-      output.push_back(*it);
-
-  return output;
-}
-
-// The following routines generate an XML representation of a UnitTest
-// object.
-// GOOGLETEST_CM0009 DO NOT DELETE
-//
-// This is how Google Test concepts map to the DTD:
-//
-// <testsuites name="AllTests">        <-- corresponds to a UnitTest object
-//   <testsuite name="testcase-name">  <-- corresponds to a TestSuite object
-//     <testcase name="test-name">     <-- corresponds to a TestInfo object
-//       <failure message="...">...</failure>
-//       <failure message="...">...</failure>
-//       <failure message="...">...</failure>
-//                                     <-- individual assertion failures
-//     </testcase>
-//   </testsuite>
-// </testsuites>
-
-// Formats the given time in milliseconds as seconds.
-std::string FormatTimeInMillisAsSeconds(TimeInMillis ms) {
-  ::std::stringstream ss;
-  ss << (static_cast<double>(ms) * 1e-3);
-  return ss.str();
-}
-
-static bool PortableLocaltime(time_t seconds, struct tm* out) {
-#if defined(_MSC_VER)
-  return localtime_s(out, &seconds) == 0;
-#elif defined(__MINGW32__) || defined(__MINGW64__)
-  // MINGW <time.h> provides neither localtime_r nor localtime_s, but uses
-  // Windows' localtime(), which has a thread-local tm buffer.
-  struct tm* tm_ptr = localtime(&seconds);  // NOLINT
-  if (tm_ptr == nullptr) return false;
-  *out = *tm_ptr;
-  return true;
-#else
-  return localtime_r(&seconds, out) != nullptr;
-#endif
-}
-
-// Converts the given epoch time in milliseconds to a date string in the ISO
-// 8601 format, without the timezone information.
-std::string FormatEpochTimeInMillisAsIso8601(TimeInMillis ms) {
-  struct tm time_struct;
-  if (!PortableLocaltime(static_cast<time_t>(ms / 1000), &time_struct))
-    return "";
-  // YYYY-MM-DDThh:mm:ss
-  return StreamableToString(time_struct.tm_year + 1900) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mon + 1) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mday) + "T" +
-      String::FormatIntWidth2(time_struct.tm_hour) + ":" +
-      String::FormatIntWidth2(time_struct.tm_min) + ":" +
-      String::FormatIntWidth2(time_struct.tm_sec);
-}
-
-// Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
-void XmlUnitTestResultPrinter::OutputXmlCDataSection(::std::ostream* stream,
-                                                     const char* data) {
-  const char* segment = data;
-  *stream << "<![CDATA[";
-  for (;;) {
-    const char* const next_segment = strstr(segment, "]]>");
-    if (next_segment != nullptr) {
-      stream->write(
-          segment, static_cast<std::streamsize>(next_segment - segment));
-      *stream << "]]>]]&gt;<![CDATA[";
-      segment = next_segment + strlen("]]>");
-    } else {
-      *stream << segment;
-      break;
-    }
-  }
-  *stream << "]]>";
-}
-
-void XmlUnitTestResultPrinter::OutputXmlAttribute(
-    std::ostream* stream,
-    const std::string& element_name,
-    const std::string& name,
-    const std::string& value) {
-  const std::vector<std::string>& allowed_names =
-      GetReservedOutputAttributesForElement(element_name);
-
-  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
-                   allowed_names.end())
-      << "Attribute " << name << " is not allowed for element <" << element_name
-      << ">.";
-
-  *stream << " " << name << "=\"" << EscapeXmlAttribute(value) << "\"";
-}
-
-// Prints an XML representation of a TestInfo object.
-void XmlUnitTestResultPrinter::OutputXmlTestInfo(::std::ostream* stream,
-                                                 const char* test_suite_name,
-                                                 const TestInfo& test_info) {
-  const TestResult& result = *test_info.result();
-  const std::string kTestsuite = "testcase";
-
-  if (test_info.is_in_another_shard()) {
-    return;
-  }
-
-  *stream << "    <testcase";
-  OutputXmlAttribute(stream, kTestsuite, "name", test_info.name());
-
-  if (test_info.value_param() != nullptr) {
-    OutputXmlAttribute(stream, kTestsuite, "value_param",
-                       test_info.value_param());
-  }
-  if (test_info.type_param() != nullptr) {
-    OutputXmlAttribute(stream, kTestsuite, "type_param",
-                       test_info.type_param());
-  }
-  if (GTEST_FLAG(list_tests)) {
-    OutputXmlAttribute(stream, kTestsuite, "file", test_info.file());
-    OutputXmlAttribute(stream, kTestsuite, "line",
-                       StreamableToString(test_info.line()));
-    *stream << " />\n";
-    return;
-  }
-
-  OutputXmlAttribute(stream, kTestsuite, "status",
-                     test_info.should_run() ? "run" : "notrun");
-  OutputXmlAttribute(stream, kTestsuite, "result",
-                     test_info.should_run()
-                         ? (result.Skipped() ? "skipped" : "completed")
-                         : "suppressed");
-  OutputXmlAttribute(stream, kTestsuite, "time",
-                     FormatTimeInMillisAsSeconds(result.elapsed_time()));
-  OutputXmlAttribute(
-      stream, kTestsuite, "timestamp",
-      FormatEpochTimeInMillisAsIso8601(result.start_timestamp()));
-  OutputXmlAttribute(stream, kTestsuite, "classname", test_suite_name);
-
-  int failures = 0;
-  for (int i = 0; i < result.total_part_count(); ++i) {
-    const TestPartResult& part = result.GetTestPartResult(i);
-    if (part.failed()) {
-      if (++failures == 1) {
-        *stream << ">\n";
-      }
-      const std::string location =
-          internal::FormatCompilerIndependentFileLocation(part.file_name(),
-                                                          part.line_number());
-      const std::string summary = location + "\n" + part.summary();
-      *stream << "      <failure message=\""
-              << EscapeXmlAttribute(summary.c_str())
-              << "\" type=\"\">";
-      const std::string detail = location + "\n" + part.message();
-      OutputXmlCDataSection(stream, RemoveInvalidXmlCharacters(detail).c_str());
-      *stream << "</failure>\n";
-    }
-  }
-
-  if (failures == 0 && result.test_property_count() == 0) {
-    *stream << " />\n";
-  } else {
-    if (failures == 0) {
-      *stream << ">\n";
-    }
-    OutputXmlTestProperties(stream, result);
-    *stream << "    </testcase>\n";
-  }
-}
-
-// Prints an XML representation of a TestSuite object
-void XmlUnitTestResultPrinter::PrintXmlTestSuite(std::ostream* stream,
-                                                 const TestSuite& test_suite) {
-  const std::string kTestsuite = "testsuite";
-  *stream << "  <" << kTestsuite;
-  OutputXmlAttribute(stream, kTestsuite, "name", test_suite.name());
-  OutputXmlAttribute(stream, kTestsuite, "tests",
-                     StreamableToString(test_suite.reportable_test_count()));
-  if (!GTEST_FLAG(list_tests)) {
-    OutputXmlAttribute(stream, kTestsuite, "failures",
-                       StreamableToString(test_suite.failed_test_count()));
-    OutputXmlAttribute(
-        stream, kTestsuite, "disabled",
-        StreamableToString(test_suite.reportable_disabled_test_count()));
-    OutputXmlAttribute(stream, kTestsuite, "errors", "0");
-    OutputXmlAttribute(stream, kTestsuite, "time",
-                       FormatTimeInMillisAsSeconds(test_suite.elapsed_time()));
-    OutputXmlAttribute(
-        stream, kTestsuite, "timestamp",
-        FormatEpochTimeInMillisAsIso8601(test_suite.start_timestamp()));
-    *stream << TestPropertiesAsXmlAttributes(test_suite.ad_hoc_test_result());
-  }
-  *stream << ">\n";
-  for (int i = 0; i < test_suite.total_test_count(); ++i) {
-    if (test_suite.GetTestInfo(i)->is_reportable())
-      OutputXmlTestInfo(stream, test_suite.name(), *test_suite.GetTestInfo(i));
-  }
-  *stream << "  </" << kTestsuite << ">\n";
-}
-
-// Prints an XML summary of unit_test to output stream out.
-void XmlUnitTestResultPrinter::PrintXmlUnitTest(std::ostream* stream,
-                                                const UnitTest& unit_test) {
-  const std::string kTestsuites = "testsuites";
-
-  *stream << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
-  *stream << "<" << kTestsuites;
-
-  OutputXmlAttribute(stream, kTestsuites, "tests",
-                     StreamableToString(unit_test.reportable_test_count()));
-  OutputXmlAttribute(stream, kTestsuites, "failures",
-                     StreamableToString(unit_test.failed_test_count()));
-  OutputXmlAttribute(
-      stream, kTestsuites, "disabled",
-      StreamableToString(unit_test.reportable_disabled_test_count()));
-  OutputXmlAttribute(stream, kTestsuites, "errors", "0");
-  OutputXmlAttribute(stream, kTestsuites, "time",
-                     FormatTimeInMillisAsSeconds(unit_test.elapsed_time()));
-  OutputXmlAttribute(
-      stream, kTestsuites, "timestamp",
-      FormatEpochTimeInMillisAsIso8601(unit_test.start_timestamp()));
-
-  if (GTEST_FLAG(shuffle)) {
-    OutputXmlAttribute(stream, kTestsuites, "random_seed",
-                       StreamableToString(unit_test.random_seed()));
-  }
-  *stream << TestPropertiesAsXmlAttributes(unit_test.ad_hoc_test_result());
-
-  OutputXmlAttribute(stream, kTestsuites, "name", "AllTests");
-  *stream << ">\n";
-
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    if (unit_test.GetTestSuite(i)->reportable_test_count() > 0)
-      PrintXmlTestSuite(stream, *unit_test.GetTestSuite(i));
-  }
-  *stream << "</" << kTestsuites << ">\n";
-}
-
-void XmlUnitTestResultPrinter::PrintXmlTestsList(
-    std::ostream* stream, const std::vector<TestSuite*>& test_suites) {
-  const std::string kTestsuites = "testsuites";
-
-  *stream << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
-  *stream << "<" << kTestsuites;
-
-  int total_tests = 0;
-  for (auto test_suite : test_suites) {
-    total_tests += test_suite->total_test_count();
-  }
-  OutputXmlAttribute(stream, kTestsuites, "tests",
-                     StreamableToString(total_tests));
-  OutputXmlAttribute(stream, kTestsuites, "name", "AllTests");
-  *stream << ">\n";
-
-  for (auto test_suite : test_suites) {
-    PrintXmlTestSuite(stream, *test_suite);
-  }
-  *stream << "</" << kTestsuites << ">\n";
-}
-
-// Produces a string representing the test properties in a result as space
-// delimited XML attributes based on the property key="value" pairs.
-std::string XmlUnitTestResultPrinter::TestPropertiesAsXmlAttributes(
-    const TestResult& result) {
-  Message attributes;
-  for (int i = 0; i < result.test_property_count(); ++i) {
-    const TestProperty& property = result.GetTestProperty(i);
-    attributes << " " << property.key() << "="
-        << "\"" << EscapeXmlAttribute(property.value()) << "\"";
-  }
-  return attributes.GetString();
-}
-
-void XmlUnitTestResultPrinter::OutputXmlTestProperties(
-    std::ostream* stream, const TestResult& result) {
-  const std::string kProperties = "properties";
-  const std::string kProperty = "property";
-
-  if (result.test_property_count() <= 0) {
-    return;
-  }
-
-  *stream << "<" << kProperties << ">\n";
-  for (int i = 0; i < result.test_property_count(); ++i) {
-    const TestProperty& property = result.GetTestProperty(i);
-    *stream << "<" << kProperty;
-    *stream << " name=\"" << EscapeXmlAttribute(property.key()) << "\"";
-    *stream << " value=\"" << EscapeXmlAttribute(property.value()) << "\"";
-    *stream << "/>\n";
-  }
-  *stream << "</" << kProperties << ">\n";
-}
-
-// End XmlUnitTestResultPrinter
-
-// This class generates an JSON output file.
-class JsonUnitTestResultPrinter : public EmptyTestEventListener {
- public:
-  explicit JsonUnitTestResultPrinter(const char* output_file);
-
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-
-  // Prints an JSON summary of all unit tests.
-  static void PrintJsonTestList(::std::ostream* stream,
-                                const std::vector<TestSuite*>& test_suites);
-
- private:
-  // Returns an JSON-escaped copy of the input string str.
-  static std::string EscapeJson(const std::string& str);
-
-  //// Verifies that the given attribute belongs to the given element and
-  //// streams the attribute as JSON.
-  static void OutputJsonKey(std::ostream* stream,
-                            const std::string& element_name,
-                            const std::string& name,
-                            const std::string& value,
-                            const std::string& indent,
-                            bool comma = true);
-  static void OutputJsonKey(std::ostream* stream,
-                            const std::string& element_name,
-                            const std::string& name,
-                            int value,
-                            const std::string& indent,
-                            bool comma = true);
-
-  // Streams a JSON representation of a TestInfo object.
-  static void OutputJsonTestInfo(::std::ostream* stream,
-                                 const char* test_suite_name,
-                                 const TestInfo& test_info);
-
-  // Prints a JSON representation of a TestSuite object
-  static void PrintJsonTestSuite(::std::ostream* stream,
-                                 const TestSuite& test_suite);
-
-  // Prints a JSON summary of unit_test to output stream out.
-  static void PrintJsonUnitTest(::std::ostream* stream,
-                                const UnitTest& unit_test);
-
-  // Produces a string representing the test properties in a result as
-  // a JSON dictionary.
-  static std::string TestPropertiesAsJson(const TestResult& result,
-                                          const std::string& indent);
-
-  // The output file.
-  const std::string output_file_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(JsonUnitTestResultPrinter);
-};
-
-// Creates a new JsonUnitTestResultPrinter.
-JsonUnitTestResultPrinter::JsonUnitTestResultPrinter(const char* output_file)
-    : output_file_(output_file) {
-  if (output_file_.empty()) {
-    GTEST_LOG_(FATAL) << "JSON output file may not be null";
-  }
-}
-
-void JsonUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                  int /*iteration*/) {
-  FILE* jsonout = OpenFileForWriting(output_file_);
-  std::stringstream stream;
-  PrintJsonUnitTest(&stream, unit_test);
-  fprintf(jsonout, "%s", StringStreamToString(&stream).c_str());
-  fclose(jsonout);
-}
-
-// Returns an JSON-escaped copy of the input string str.
-std::string JsonUnitTestResultPrinter::EscapeJson(const std::string& str) {
-  Message m;
-
-  for (size_t i = 0; i < str.size(); ++i) {
-    const char ch = str[i];
-    switch (ch) {
-      case '\\':
-      case '"':
-      case '/':
-        m << '\\' << ch;
-        break;
-      case '\b':
-        m << "\\b";
-        break;
-      case '\t':
-        m << "\\t";
-        break;
-      case '\n':
-        m << "\\n";
-        break;
-      case '\f':
-        m << "\\f";
-        break;
-      case '\r':
-        m << "\\r";
-        break;
-      default:
-        if (ch < ' ') {
-          m << "\\u00" << String::FormatByte(static_cast<unsigned char>(ch));
-        } else {
-          m << ch;
-        }
-        break;
-    }
-  }
-
-  return m.GetString();
-}
-
-// The following routines generate an JSON representation of a UnitTest
-// object.
-
-// Formats the given time in milliseconds as seconds.
-static std::string FormatTimeInMillisAsDuration(TimeInMillis ms) {
-  ::std::stringstream ss;
-  ss << (static_cast<double>(ms) * 1e-3) << "s";
-  return ss.str();
-}
-
-// Converts the given epoch time in milliseconds to a date string in the
-// RFC3339 format, without the timezone information.
-static std::string FormatEpochTimeInMillisAsRFC3339(TimeInMillis ms) {
-  struct tm time_struct;
-  if (!PortableLocaltime(static_cast<time_t>(ms / 1000), &time_struct))
-    return "";
-  // YYYY-MM-DDThh:mm:ss
-  return StreamableToString(time_struct.tm_year + 1900) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mon + 1) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mday) + "T" +
-      String::FormatIntWidth2(time_struct.tm_hour) + ":" +
-      String::FormatIntWidth2(time_struct.tm_min) + ":" +
-      String::FormatIntWidth2(time_struct.tm_sec) + "Z";
-}
-
-static inline std::string Indent(size_t width) {
-  return std::string(width, ' ');
-}
-
-void JsonUnitTestResultPrinter::OutputJsonKey(
-    std::ostream* stream,
-    const std::string& element_name,
-    const std::string& name,
-    const std::string& value,
-    const std::string& indent,
-    bool comma) {
-  const std::vector<std::string>& allowed_names =
-      GetReservedOutputAttributesForElement(element_name);
-
-  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
-                   allowed_names.end())
-      << "Key \"" << name << "\" is not allowed for value \"" << element_name
-      << "\".";
-
-  *stream << indent << "\"" << name << "\": \"" << EscapeJson(value) << "\"";
-  if (comma)
-    *stream << ",\n";
-}
-
-void JsonUnitTestResultPrinter::OutputJsonKey(
-    std::ostream* stream,
-    const std::string& element_name,
-    const std::string& name,
-    int value,
-    const std::string& indent,
-    bool comma) {
-  const std::vector<std::string>& allowed_names =
-      GetReservedOutputAttributesForElement(element_name);
-
-  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
-                   allowed_names.end())
-      << "Key \"" << name << "\" is not allowed for value \"" << element_name
-      << "\".";
-
-  *stream << indent << "\"" << name << "\": " << StreamableToString(value);
-  if (comma)
-    *stream << ",\n";
-}
-
-// Prints a JSON representation of a TestInfo object.
-void JsonUnitTestResultPrinter::OutputJsonTestInfo(::std::ostream* stream,
-                                                   const char* test_suite_name,
-                                                   const TestInfo& test_info) {
-  const TestResult& result = *test_info.result();
-  const std::string kTestsuite = "testcase";
-  const std::string kIndent = Indent(10);
-
-  *stream << Indent(8) << "{\n";
-  OutputJsonKey(stream, kTestsuite, "name", test_info.name(), kIndent);
-
-  if (test_info.value_param() != nullptr) {
-    OutputJsonKey(stream, kTestsuite, "value_param", test_info.value_param(),
-                  kIndent);
-  }
-  if (test_info.type_param() != nullptr) {
-    OutputJsonKey(stream, kTestsuite, "type_param", test_info.type_param(),
-                  kIndent);
-  }
-  if (GTEST_FLAG(list_tests)) {
-    OutputJsonKey(stream, kTestsuite, "file", test_info.file(), kIndent);
-    OutputJsonKey(stream, kTestsuite, "line", test_info.line(), kIndent, false);
-    *stream << "\n" << Indent(8) << "}";
-    return;
-  }
-
-  OutputJsonKey(stream, kTestsuite, "status",
-                test_info.should_run() ? "RUN" : "NOTRUN", kIndent);
-  OutputJsonKey(stream, kTestsuite, "result",
-                test_info.should_run()
-                    ? (result.Skipped() ? "SKIPPED" : "COMPLETED")
-                    : "SUPPRESSED",
-                kIndent);
-  OutputJsonKey(stream, kTestsuite, "timestamp",
-                FormatEpochTimeInMillisAsRFC3339(result.start_timestamp()),
-                kIndent);
-  OutputJsonKey(stream, kTestsuite, "time",
-                FormatTimeInMillisAsDuration(result.elapsed_time()), kIndent);
-  OutputJsonKey(stream, kTestsuite, "classname", test_suite_name, kIndent,
-                false);
-  *stream << TestPropertiesAsJson(result, kIndent);
-
-  int failures = 0;
-  for (int i = 0; i < result.total_part_count(); ++i) {
-    const TestPartResult& part = result.GetTestPartResult(i);
-    if (part.failed()) {
-      *stream << ",\n";
-      if (++failures == 1) {
-        *stream << kIndent << "\"" << "failures" << "\": [\n";
-      }
-      const std::string location =
-          internal::FormatCompilerIndependentFileLocation(part.file_name(),
-                                                          part.line_number());
-      const std::string message = EscapeJson(location + "\n" + part.message());
-      *stream << kIndent << "  {\n"
-              << kIndent << "    \"failure\": \"" << message << "\",\n"
-              << kIndent << "    \"type\": \"\"\n"
-              << kIndent << "  }";
-    }
-  }
-
-  if (failures > 0)
-    *stream << "\n" << kIndent << "]";
-  *stream << "\n" << Indent(8) << "}";
-}
-
-// Prints an JSON representation of a TestSuite object
-void JsonUnitTestResultPrinter::PrintJsonTestSuite(
-    std::ostream* stream, const TestSuite& test_suite) {
-  const std::string kTestsuite = "testsuite";
-  const std::string kIndent = Indent(6);
-
-  *stream << Indent(4) << "{\n";
-  OutputJsonKey(stream, kTestsuite, "name", test_suite.name(), kIndent);
-  OutputJsonKey(stream, kTestsuite, "tests", test_suite.reportable_test_count(),
-                kIndent);
-  if (!GTEST_FLAG(list_tests)) {
-    OutputJsonKey(stream, kTestsuite, "failures",
-                  test_suite.failed_test_count(), kIndent);
-    OutputJsonKey(stream, kTestsuite, "disabled",
-                  test_suite.reportable_disabled_test_count(), kIndent);
-    OutputJsonKey(stream, kTestsuite, "errors", 0, kIndent);
-    OutputJsonKey(
-        stream, kTestsuite, "timestamp",
-        FormatEpochTimeInMillisAsRFC3339(test_suite.start_timestamp()),
-        kIndent);
-    OutputJsonKey(stream, kTestsuite, "time",
-                  FormatTimeInMillisAsDuration(test_suite.elapsed_time()),
-                  kIndent, false);
-    *stream << TestPropertiesAsJson(test_suite.ad_hoc_test_result(), kIndent)
-            << ",\n";
-  }
-
-  *stream << kIndent << "\"" << kTestsuite << "\": [\n";
-
-  bool comma = false;
-  for (int i = 0; i < test_suite.total_test_count(); ++i) {
-    if (test_suite.GetTestInfo(i)->is_reportable()) {
-      if (comma) {
-        *stream << ",\n";
-      } else {
-        comma = true;
-      }
-      OutputJsonTestInfo(stream, test_suite.name(), *test_suite.GetTestInfo(i));
-    }
-  }
-  *stream << "\n" << kIndent << "]\n" << Indent(4) << "}";
-}
-
-// Prints a JSON summary of unit_test to output stream out.
-void JsonUnitTestResultPrinter::PrintJsonUnitTest(std::ostream* stream,
-                                                  const UnitTest& unit_test) {
-  const std::string kTestsuites = "testsuites";
-  const std::string kIndent = Indent(2);
-  *stream << "{\n";
-
-  OutputJsonKey(stream, kTestsuites, "tests", unit_test.reportable_test_count(),
-                kIndent);
-  OutputJsonKey(stream, kTestsuites, "failures", unit_test.failed_test_count(),
-                kIndent);
-  OutputJsonKey(stream, kTestsuites, "disabled",
-                unit_test.reportable_disabled_test_count(), kIndent);
-  OutputJsonKey(stream, kTestsuites, "errors", 0, kIndent);
-  if (GTEST_FLAG(shuffle)) {
-    OutputJsonKey(stream, kTestsuites, "random_seed", unit_test.random_seed(),
-                  kIndent);
-  }
-  OutputJsonKey(stream, kTestsuites, "timestamp",
-                FormatEpochTimeInMillisAsRFC3339(unit_test.start_timestamp()),
-                kIndent);
-  OutputJsonKey(stream, kTestsuites, "time",
-                FormatTimeInMillisAsDuration(unit_test.elapsed_time()), kIndent,
-                false);
-
-  *stream << TestPropertiesAsJson(unit_test.ad_hoc_test_result(), kIndent)
-          << ",\n";
-
-  OutputJsonKey(stream, kTestsuites, "name", "AllTests", kIndent);
-  *stream << kIndent << "\"" << kTestsuites << "\": [\n";
-
-  bool comma = false;
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    if (unit_test.GetTestSuite(i)->reportable_test_count() > 0) {
-      if (comma) {
-        *stream << ",\n";
-      } else {
-        comma = true;
-      }
-      PrintJsonTestSuite(stream, *unit_test.GetTestSuite(i));
-    }
-  }
-
-  *stream << "\n" << kIndent << "]\n" << "}\n";
-}
-
-void JsonUnitTestResultPrinter::PrintJsonTestList(
-    std::ostream* stream, const std::vector<TestSuite*>& test_suites) {
-  const std::string kTestsuites = "testsuites";
-  const std::string kIndent = Indent(2);
-  *stream << "{\n";
-  int total_tests = 0;
-  for (auto test_suite : test_suites) {
-    total_tests += test_suite->total_test_count();
-  }
-  OutputJsonKey(stream, kTestsuites, "tests", total_tests, kIndent);
-
-  OutputJsonKey(stream, kTestsuites, "name", "AllTests", kIndent);
-  *stream << kIndent << "\"" << kTestsuites << "\": [\n";
-
-  for (size_t i = 0; i < test_suites.size(); ++i) {
-    if (i != 0) {
-      *stream << ",\n";
-    }
-    PrintJsonTestSuite(stream, *test_suites[i]);
-  }
-
-  *stream << "\n"
-          << kIndent << "]\n"
-          << "}\n";
-}
-// Produces a string representing the test properties in a result as
-// a JSON dictionary.
-std::string JsonUnitTestResultPrinter::TestPropertiesAsJson(
-    const TestResult& result, const std::string& indent) {
-  Message attributes;
-  for (int i = 0; i < result.test_property_count(); ++i) {
-    const TestProperty& property = result.GetTestProperty(i);
-    attributes << ",\n" << indent << "\"" << property.key() << "\": "
-               << "\"" << EscapeJson(property.value()) << "\"";
-  }
-  return attributes.GetString();
-}
-
-// End JsonUnitTestResultPrinter
-
-#if GTEST_CAN_STREAM_RESULTS_
-
-// Checks if str contains '=', '&', '%' or '\n' characters. If yes,
-// replaces them by "%xx" where xx is their hexadecimal value. For
-// example, replaces "=" with "%3D".  This algorithm is O(strlen(str))
-// in both time and space -- important as the input str may contain an
-// arbitrarily long test failure message and stack trace.
-std::string StreamingListener::UrlEncode(const char* str) {
-  std::string result;
-  result.reserve(strlen(str) + 1);
-  for (char ch = *str; ch != '\0'; ch = *++str) {
-    switch (ch) {
-      case '%':
-      case '=':
-      case '&':
-      case '\n':
-        result.append("%" + String::FormatByte(static_cast<unsigned char>(ch)));
-        break;
-      default:
-        result.push_back(ch);
-        break;
-    }
-  }
-  return result;
-}
-
-void StreamingListener::SocketWriter::MakeConnection() {
-  GTEST_CHECK_(sockfd_ == -1)
-      << "MakeConnection() can't be called when there is already a connection.";
-
-  addrinfo hints;
-  memset(&hints, 0, sizeof(hints));
-  hints.ai_family = AF_UNSPEC;    // To allow both IPv4 and IPv6 addresses.
-  hints.ai_socktype = SOCK_STREAM;
-  addrinfo* servinfo = nullptr;
-
-  // Use the getaddrinfo() to get a linked list of IP addresses for
-  // the given host name.
-  const int error_num = getaddrinfo(
-      host_name_.c_str(), port_num_.c_str(), &hints, &servinfo);
-  if (error_num != 0) {
-    GTEST_LOG_(WARNING) << "stream_result_to: getaddrinfo() failed: "
-                        << gai_strerror(error_num);
-  }
-
-  // Loop through all the results and connect to the first we can.
-  for (addrinfo* cur_addr = servinfo; sockfd_ == -1 && cur_addr != nullptr;
-       cur_addr = cur_addr->ai_next) {
-    sockfd_ = socket(
-        cur_addr->ai_family, cur_addr->ai_socktype, cur_addr->ai_protocol);
-    if (sockfd_ != -1) {
-      // Connect the client socket to the server socket.
-      if (connect(sockfd_, cur_addr->ai_addr, cur_addr->ai_addrlen) == -1) {
-        close(sockfd_);
-        sockfd_ = -1;
-      }
-    }
-  }
-
-  freeaddrinfo(servinfo);  // all done with this structure
-
-  if (sockfd_ == -1) {
-    GTEST_LOG_(WARNING) << "stream_result_to: failed to connect to "
-                        << host_name_ << ":" << port_num_;
-  }
-}
-
-// End of class Streaming Listener
-#endif  // GTEST_CAN_STREAM_RESULTS__
-
-// class OsStackTraceGetter
-
-const char* const OsStackTraceGetterInterface::kElidedFramesMarker =
-    "... " GTEST_NAME_ " internal frames ...";
-
-std::string OsStackTraceGetter::CurrentStackTrace(int max_depth, int skip_count)
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-#if GTEST_HAS_ABSL
-  std::string result;
-
-  if (max_depth <= 0) {
-    return result;
-  }
-
-  max_depth = std::min(max_depth, kMaxStackTraceDepth);
-
-  std::vector<void*> raw_stack(max_depth);
-  // Skips the frames requested by the caller, plus this function.
-  const int raw_stack_size =
-      absl::GetStackTrace(&raw_stack[0], max_depth, skip_count + 1);
-
-  void* caller_frame = nullptr;
-  {
-    MutexLock lock(&mutex_);
-    caller_frame = caller_frame_;
-  }
-
-  for (int i = 0; i < raw_stack_size; ++i) {
-    if (raw_stack[i] == caller_frame &&
-        !GTEST_FLAG(show_internal_stack_frames)) {
-      // Add a marker to the trace and stop adding frames.
-      absl::StrAppend(&result, kElidedFramesMarker, "\n");
-      break;
-    }
-
-    char tmp[1024];
-    const char* symbol = "(unknown)";
-    if (absl::Symbolize(raw_stack[i], tmp, sizeof(tmp))) {
-      symbol = tmp;
-    }
-
-    char line[1024];
-    snprintf(line, sizeof(line), "  %p: %s\n", raw_stack[i], symbol);
-    result += line;
-  }
-
-  return result;
-
-#else  // !GTEST_HAS_ABSL
-  static_cast<void>(max_depth);
-  static_cast<void>(skip_count);
-  return "";
-#endif  // GTEST_HAS_ABSL
-}
-
-void OsStackTraceGetter::UponLeavingGTest() GTEST_LOCK_EXCLUDED_(mutex_) {
-#if GTEST_HAS_ABSL
-  void* caller_frame = nullptr;
-  if (absl::GetStackTrace(&caller_frame, 1, 3) <= 0) {
-    caller_frame = nullptr;
-  }
-
-  MutexLock lock(&mutex_);
-  caller_frame_ = caller_frame;
-#endif  // GTEST_HAS_ABSL
-}
-
-// A helper class that creates the premature-exit file in its
-// constructor and deletes the file in its destructor.
-class ScopedPrematureExitFile {
- public:
-  explicit ScopedPrematureExitFile(const char* premature_exit_filepath)
-      : premature_exit_filepath_(premature_exit_filepath ?
-                                 premature_exit_filepath : "") {
-    // If a path to the premature-exit file is specified...
-    if (!premature_exit_filepath_.empty()) {
-      // create the file with a single "0" character in it.  I/O
-      // errors are ignored as there's nothing better we can do and we
-      // don't want to fail the test because of this.
-      FILE* pfile = posix::FOpen(premature_exit_filepath, "w");
-      fwrite("0", 1, 1, pfile);
-      fclose(pfile);
-    }
-  }
-
-  ~ScopedPrematureExitFile() {
-    if (!premature_exit_filepath_.empty()) {
-      int retval = remove(premature_exit_filepath_.c_str());
-      if (retval) {
-        GTEST_LOG_(ERROR) << "Failed to remove premature exit filepath \""
-                          << premature_exit_filepath_ << "\" with error "
-                          << retval;
-      }
-    }
-  }
-
- private:
-  const std::string premature_exit_filepath_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedPrematureExitFile);
-};
-
-}  // namespace internal
-
-// class TestEventListeners
-
-TestEventListeners::TestEventListeners()
-    : repeater_(new internal::TestEventRepeater()),
-      default_result_printer_(nullptr),
-      default_xml_generator_(nullptr) {}
-
-TestEventListeners::~TestEventListeners() { delete repeater_; }
-
-// Returns the standard listener responsible for the default console
-// output.  Can be removed from the listeners list to shut down default
-// console output.  Note that removing this object from the listener list
-// with Release transfers its ownership to the user.
-void TestEventListeners::Append(TestEventListener* listener) {
-  repeater_->Append(listener);
-}
-
-// Removes the given event listener from the list and returns it.  It then
-// becomes the caller's responsibility to delete the listener. Returns
-// NULL if the listener is not found in the list.
-TestEventListener* TestEventListeners::Release(TestEventListener* listener) {
-  if (listener == default_result_printer_)
-    default_result_printer_ = nullptr;
-  else if (listener == default_xml_generator_)
-    default_xml_generator_ = nullptr;
-  return repeater_->Release(listener);
-}
-
-// Returns repeater that broadcasts the TestEventListener events to all
-// subscribers.
-TestEventListener* TestEventListeners::repeater() { return repeater_; }
-
-// Sets the default_result_printer attribute to the provided listener.
-// The listener is also added to the listener list and previous
-// default_result_printer is removed from it and deleted. The listener can
-// also be NULL in which case it will not be added to the list. Does
-// nothing if the previous and the current listener objects are the same.
-void TestEventListeners::SetDefaultResultPrinter(TestEventListener* listener) {
-  if (default_result_printer_ != listener) {
-    // It is an error to pass this method a listener that is already in the
-    // list.
-    delete Release(default_result_printer_);
-    default_result_printer_ = listener;
-    if (listener != nullptr) Append(listener);
-  }
-}
-
-// Sets the default_xml_generator attribute to the provided listener.  The
-// listener is also added to the listener list and previous
-// default_xml_generator is removed from it and deleted. The listener can
-// also be NULL in which case it will not be added to the list. Does
-// nothing if the previous and the current listener objects are the same.
-void TestEventListeners::SetDefaultXmlGenerator(TestEventListener* listener) {
-  if (default_xml_generator_ != listener) {
-    // It is an error to pass this method a listener that is already in the
-    // list.
-    delete Release(default_xml_generator_);
-    default_xml_generator_ = listener;
-    if (listener != nullptr) Append(listener);
-  }
-}
-
-// Controls whether events will be forwarded by the repeater to the
-// listeners in the list.
-bool TestEventListeners::EventForwardingEnabled() const {
-  return repeater_->forwarding_enabled();
-}
-
-void TestEventListeners::SuppressEventForwarding() {
-  repeater_->set_forwarding_enabled(false);
-}
-
-// class UnitTest
-
-// Gets the singleton UnitTest object.  The first time this method is
-// called, a UnitTest object is constructed and returned.  Consecutive
-// calls will return the same object.
-//
-// We don't protect this under mutex_ as a user is not supposed to
-// call this before main() starts, from which point on the return
-// value will never change.
-UnitTest* UnitTest::GetInstance() {
-  // CodeGear C++Builder insists on a public destructor for the
-  // default implementation.  Use this implementation to keep good OO
-  // design with private destructor.
-
-#if defined(__BORLANDC__)
-  static UnitTest* const instance = new UnitTest;
-  return instance;
-#else
-  static UnitTest instance;
-  return &instance;
-#endif  // defined(__BORLANDC__)
-}
-
-// Gets the number of successful test suites.
-int UnitTest::successful_test_suite_count() const {
-  return impl()->successful_test_suite_count();
-}
-
-// Gets the number of failed test suites.
-int UnitTest::failed_test_suite_count() const {
-  return impl()->failed_test_suite_count();
-}
-
-// Gets the number of all test suites.
-int UnitTest::total_test_suite_count() const {
-  return impl()->total_test_suite_count();
-}
-
-// Gets the number of all test suites that contain at least one test
-// that should run.
-int UnitTest::test_suite_to_run_count() const {
-  return impl()->test_suite_to_run_count();
-}
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-int UnitTest::successful_test_case_count() const {
-  return impl()->successful_test_suite_count();
-}
-int UnitTest::failed_test_case_count() const {
-  return impl()->failed_test_suite_count();
-}
-int UnitTest::total_test_case_count() const {
-  return impl()->total_test_suite_count();
-}
-int UnitTest::test_case_to_run_count() const {
-  return impl()->test_suite_to_run_count();
-}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// Gets the number of successful tests.
-int UnitTest::successful_test_count() const {
-  return impl()->successful_test_count();
-}
-
-// Gets the number of skipped tests.
-int UnitTest::skipped_test_count() const {
-  return impl()->skipped_test_count();
-}
-
-// Gets the number of failed tests.
-int UnitTest::failed_test_count() const { return impl()->failed_test_count(); }
-
-// Gets the number of disabled tests that will be reported in the XML report.
-int UnitTest::reportable_disabled_test_count() const {
-  return impl()->reportable_disabled_test_count();
-}
-
-// Gets the number of disabled tests.
-int UnitTest::disabled_test_count() const {
-  return impl()->disabled_test_count();
-}
-
-// Gets the number of tests to be printed in the XML report.
-int UnitTest::reportable_test_count() const {
-  return impl()->reportable_test_count();
-}
-
-// Gets the number of all tests.
-int UnitTest::total_test_count() const { return impl()->total_test_count(); }
-
-// Gets the number of tests that should run.
-int UnitTest::test_to_run_count() const { return impl()->test_to_run_count(); }
-
-// Gets the time of the test program start, in ms from the start of the
-// UNIX epoch.
-internal::TimeInMillis UnitTest::start_timestamp() const {
-    return impl()->start_timestamp();
-}
-
-// Gets the elapsed time, in milliseconds.
-internal::TimeInMillis UnitTest::elapsed_time() const {
-  return impl()->elapsed_time();
-}
-
-// Returns true if and only if the unit test passed (i.e. all test suites
-// passed).
-bool UnitTest::Passed() const { return impl()->Passed(); }
-
-// Returns true if and only if the unit test failed (i.e. some test suite
-// failed or something outside of all tests failed).
-bool UnitTest::Failed() const { return impl()->Failed(); }
-
-// Gets the i-th test suite among all the test suites. i can range from 0 to
-// total_test_suite_count() - 1. If i is not in that range, returns NULL.
-const TestSuite* UnitTest::GetTestSuite(int i) const {
-  return impl()->GetTestSuite(i);
-}
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-const TestCase* UnitTest::GetTestCase(int i) const {
-  return impl()->GetTestCase(i);
-}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// Returns the TestResult containing information on test failures and
-// properties logged outside of individual test suites.
-const TestResult& UnitTest::ad_hoc_test_result() const {
-  return *impl()->ad_hoc_test_result();
-}
-
-// Gets the i-th test suite among all the test suites. i can range from 0 to
-// total_test_suite_count() - 1. If i is not in that range, returns NULL.
-TestSuite* UnitTest::GetMutableTestSuite(int i) {
-  return impl()->GetMutableSuiteCase(i);
-}
-
-// Returns the list of event listeners that can be used to track events
-// inside Google Test.
-TestEventListeners& UnitTest::listeners() {
-  return *impl()->listeners();
-}
-
-// Registers and returns a global test environment.  When a test
-// program is run, all global test environments will be set-up in the
-// order they were registered.  After all tests in the program have
-// finished, all global test environments will be torn-down in the
-// *reverse* order they were registered.
-//
-// The UnitTest object takes ownership of the given environment.
-//
-// We don't protect this under mutex_, as we only support calling it
-// from the main thread.
-Environment* UnitTest::AddEnvironment(Environment* env) {
-  if (env == nullptr) {
-    return nullptr;
-  }
-
-  impl_->environments().push_back(env);
-  return env;
-}
-
-// Adds a TestPartResult to the current TestResult object.  All Google Test
-// assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc) eventually call
-// this to report their results.  The user code should use the
-// assertion macros instead of calling this directly.
-void UnitTest::AddTestPartResult(
-    TestPartResult::Type result_type,
-    const char* file_name,
-    int line_number,
-    const std::string& message,
-    const std::string& os_stack_trace) GTEST_LOCK_EXCLUDED_(mutex_) {
-  Message msg;
-  msg << message;
-
-  internal::MutexLock lock(&mutex_);
-  if (impl_->gtest_trace_stack().size() > 0) {
-    msg << "\n" << GTEST_NAME_ << " trace:";
-
-    for (size_t i = impl_->gtest_trace_stack().size(); i > 0; --i) {
-      const internal::TraceInfo& trace = impl_->gtest_trace_stack()[i - 1];
-      msg << "\n" << internal::FormatFileLocation(trace.file, trace.line)
-          << " " << trace.message;
-    }
-  }
-
-  if (os_stack_trace.c_str() != nullptr && !os_stack_trace.empty()) {
-    msg << internal::kStackTraceMarker << os_stack_trace;
-  }
-
-  const TestPartResult result = TestPartResult(
-      result_type, file_name, line_number, msg.GetString().c_str());
-  impl_->GetTestPartResultReporterForCurrentThread()->
-      ReportTestPartResult(result);
-
-  if (result_type != TestPartResult::kSuccess &&
-      result_type != TestPartResult::kSkip) {
-    // gtest_break_on_failure takes precedence over
-    // gtest_throw_on_failure.  This allows a user to set the latter
-    // in the code (perhaps in order to use Google Test assertions
-    // with another testing framework) and specify the former on the
-    // command line for debugging.
-    if (GTEST_FLAG(break_on_failure)) {
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-      // Using DebugBreak on Windows allows gtest to still break into a debugger
-      // when a failure happens and both the --gtest_break_on_failure and
-      // the --gtest_catch_exceptions flags are specified.
-      DebugBreak();
-#elif (!defined(__native_client__)) &&            \
-    ((defined(__clang__) || defined(__GNUC__)) && \
-     (defined(__x86_64__) || defined(__i386__)))
-      // with clang/gcc we can achieve the same effect on x86 by invoking int3
-      asm("int3");
-#else
-      // Dereference nullptr through a volatile pointer to prevent the compiler
-      // from removing. We use this rather than abort() or __builtin_trap() for
-      // portability: some debuggers don't correctly trap abort().
-      *static_cast<volatile int*>(nullptr) = 1;
-#endif  // GTEST_OS_WINDOWS
-    } else if (GTEST_FLAG(throw_on_failure)) {
-#if GTEST_HAS_EXCEPTIONS
-      throw internal::GoogleTestFailureException(result);
-#else
-      // We cannot call abort() as it generates a pop-up in debug mode
-      // that cannot be suppressed in VC 7.1 or below.
-      exit(1);
-#endif
-    }
-  }
-}
-
-// Adds a TestProperty to the current TestResult object when invoked from
-// inside a test, to current TestSuite's ad_hoc_test_result_ when invoked
-// from SetUpTestSuite or TearDownTestSuite, or to the global property set
-// when invoked elsewhere.  If the result already contains a property with
-// the same key, the value will be updated.
-void UnitTest::RecordProperty(const std::string& key,
-                              const std::string& value) {
-  impl_->RecordProperty(TestProperty(key, value));
-}
-
-// Runs all tests in this UnitTest object and prints the result.
-// Returns 0 if successful, or 1 otherwise.
-//
-// We don't protect this under mutex_, as we only support calling it
-// from the main thread.
-int UnitTest::Run() {
-  const bool in_death_test_child_process =
-      internal::GTEST_FLAG(internal_run_death_test).length() > 0;
-
-  // Google Test implements this protocol for catching that a test
-  // program exits before returning control to Google Test:
-  //
-  //   1. Upon start, Google Test creates a file whose absolute path
-  //      is specified by the environment variable
-  //      TEST_PREMATURE_EXIT_FILE.
-  //   2. When Google Test has finished its work, it deletes the file.
-  //
-  // This allows a test runner to set TEST_PREMATURE_EXIT_FILE before
-  // running a Google-Test-based test program and check the existence
-  // of the file at the end of the test execution to see if it has
-  // exited prematurely.
-
-  // If we are in the child process of a death test, don't
-  // create/delete the premature exit file, as doing so is unnecessary
-  // and will confuse the parent process.  Otherwise, create/delete
-  // the file upon entering/leaving this function.  If the program
-  // somehow exits before this function has a chance to return, the
-  // premature-exit file will be left undeleted, causing a test runner
-  // that understands the premature-exit-file protocol to report the
-  // test as having failed.
-  const internal::ScopedPrematureExitFile premature_exit_file(
-      in_death_test_child_process
-          ? nullptr
-          : internal::posix::GetEnv("TEST_PREMATURE_EXIT_FILE"));
-
-  // Captures the value of GTEST_FLAG(catch_exceptions).  This value will be
-  // used for the duration of the program.
-  impl()->set_catch_exceptions(GTEST_FLAG(catch_exceptions));
-
-#if GTEST_OS_WINDOWS
-  // Either the user wants Google Test to catch exceptions thrown by the
-  // tests or this is executing in the context of death test child
-  // process. In either case the user does not want to see pop-up dialogs
-  // about crashes - they are expected.
-  if (impl()->catch_exceptions() || in_death_test_child_process) {
-# if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-    // SetErrorMode doesn't exist on CE.
-    SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOALIGNMENTFAULTEXCEPT |
-                 SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX);
-# endif  // !GTEST_OS_WINDOWS_MOBILE
-
-# if (defined(_MSC_VER) || GTEST_OS_WINDOWS_MINGW) && !GTEST_OS_WINDOWS_MOBILE
-    // Death test children can be terminated with _abort().  On Windows,
-    // _abort() can show a dialog with a warning message.  This forces the
-    // abort message to go to stderr instead.
-    _set_error_mode(_OUT_TO_STDERR);
-# endif
-
-# if defined(_MSC_VER) && !GTEST_OS_WINDOWS_MOBILE
-    // In the debug version, Visual Studio pops up a separate dialog
-    // offering a choice to debug the aborted program. We need to suppress
-    // this dialog or it will pop up for every EXPECT/ASSERT_DEATH statement
-    // executed. Google Test will notify the user of any unexpected
-    // failure via stderr.
-    if (!GTEST_FLAG(break_on_failure))
-      _set_abort_behavior(
-          0x0,                                    // Clear the following flags:
-          _WRITE_ABORT_MSG | _CALL_REPORTFAULT);  // pop-up window, core dump.
-# endif
-
-    // In debug mode, the Windows CRT can crash with an assertion over invalid
-    // input (e.g. passing an invalid file descriptor).  The default handling
-    // for these assertions is to pop up a dialog and wait for user input.
-    // Instead ask the CRT to dump such assertions to stderr non-interactively.
-    if (!IsDebuggerPresent()) {
-      (void)_CrtSetReportMode(_CRT_ASSERT,
-                              _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
-      (void)_CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
-    }
-  }
-#endif  // GTEST_OS_WINDOWS
-
-  return internal::HandleExceptionsInMethodIfSupported(
-      impl(),
-      &internal::UnitTestImpl::RunAllTests,
-      "auxiliary test code (environments or event listeners)") ? 0 : 1;
-}
-
-// Returns the working directory when the first TEST() or TEST_F() was
-// executed.
-const char* UnitTest::original_working_dir() const {
-  return impl_->original_working_dir_.c_str();
-}
-
-// Returns the TestSuite object for the test that's currently running,
-// or NULL if no test is running.
-const TestSuite* UnitTest::current_test_suite() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  return impl_->current_test_suite();
-}
-
-// Legacy API is still available but deprecated
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-const TestCase* UnitTest::current_test_case() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  return impl_->current_test_suite();
-}
-#endif
-
-// Returns the TestInfo object for the test that's currently running,
-// or NULL if no test is running.
-const TestInfo* UnitTest::current_test_info() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  return impl_->current_test_info();
-}
-
-// Returns the random seed used at the start of the current test run.
-int UnitTest::random_seed() const { return impl_->random_seed(); }
-
-// Returns ParameterizedTestSuiteRegistry object used to keep track of
-// value-parameterized tests and instantiate and register them.
-internal::ParameterizedTestSuiteRegistry&
-UnitTest::parameterized_test_registry() GTEST_LOCK_EXCLUDED_(mutex_) {
-  return impl_->parameterized_test_registry();
-}
-
-// Creates an empty UnitTest.
-UnitTest::UnitTest() {
-  impl_ = new internal::UnitTestImpl(this);
-}
-
-// Destructor of UnitTest.
-UnitTest::~UnitTest() {
-  delete impl_;
-}
-
-// Pushes a trace defined by SCOPED_TRACE() on to the per-thread
-// Google Test trace stack.
-void UnitTest::PushGTestTrace(const internal::TraceInfo& trace)
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  impl_->gtest_trace_stack().push_back(trace);
-}
-
-// Pops a trace from the per-thread Google Test trace stack.
-void UnitTest::PopGTestTrace()
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  impl_->gtest_trace_stack().pop_back();
-}
-
-namespace internal {
-
-UnitTestImpl::UnitTestImpl(UnitTest* parent)
-    : parent_(parent),
-      GTEST_DISABLE_MSC_WARNINGS_PUSH_(4355 /* using this in initializer */)
-          default_global_test_part_result_reporter_(this),
-      default_per_thread_test_part_result_reporter_(this),
-      GTEST_DISABLE_MSC_WARNINGS_POP_() global_test_part_result_repoter_(
-          &default_global_test_part_result_reporter_),
-      per_thread_test_part_result_reporter_(
-          &default_per_thread_test_part_result_reporter_),
-      parameterized_test_registry_(),
-      parameterized_tests_registered_(false),
-      last_death_test_suite_(-1),
-      current_test_suite_(nullptr),
-      current_test_info_(nullptr),
-      ad_hoc_test_result_(),
-      os_stack_trace_getter_(nullptr),
-      post_flag_parse_init_performed_(false),
-      random_seed_(0),  // Will be overridden by the flag before first use.
-      random_(0),       // Will be reseeded before first use.
-      start_timestamp_(0),
-      elapsed_time_(0),
-#if GTEST_HAS_DEATH_TEST
-      death_test_factory_(new DefaultDeathTestFactory),
-#endif
-      // Will be overridden by the flag before first use.
-      catch_exceptions_(false) {
-  listeners()->SetDefaultResultPrinter(new PrettyUnitTestResultPrinter);
-}
-
-UnitTestImpl::~UnitTestImpl() {
-  // Deletes every TestSuite.
-  ForEach(test_suites_, internal::Delete<TestSuite>);
-
-  // Deletes every Environment.
-  ForEach(environments_, internal::Delete<Environment>);
-
-  delete os_stack_trace_getter_;
-}
-
-// Adds a TestProperty to the current TestResult object when invoked in a
-// context of a test, to current test suite's ad_hoc_test_result when invoke
-// from SetUpTestSuite/TearDownTestSuite, or to the global property set
-// otherwise.  If the result already contains a property with the same key,
-// the value will be updated.
-void UnitTestImpl::RecordProperty(const TestProperty& test_property) {
-  std::string xml_element;
-  TestResult* test_result;  // TestResult appropriate for property recording.
-
-  if (current_test_info_ != nullptr) {
-    xml_element = "testcase";
-    test_result = &(current_test_info_->result_);
-  } else if (current_test_suite_ != nullptr) {
-    xml_element = "testsuite";
-    test_result = &(current_test_suite_->ad_hoc_test_result_);
-  } else {
-    xml_element = "testsuites";
-    test_result = &ad_hoc_test_result_;
-  }
-  test_result->RecordProperty(xml_element, test_property);
-}
-
-#if GTEST_HAS_DEATH_TEST
-// Disables event forwarding if the control is currently in a death test
-// subprocess. Must not be called before InitGoogleTest.
-void UnitTestImpl::SuppressTestEventsIfInSubprocess() {
-  if (internal_run_death_test_flag_.get() != nullptr)
-    listeners()->SuppressEventForwarding();
-}
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Initializes event listeners performing XML output as specified by
-// UnitTestOptions. Must not be called before InitGoogleTest.
-void UnitTestImpl::ConfigureXmlOutput() {
-  const std::string& output_format = UnitTestOptions::GetOutputFormat();
-  if (output_format == "xml") {
-    listeners()->SetDefaultXmlGenerator(new XmlUnitTestResultPrinter(
-        UnitTestOptions::GetAbsolutePathToOutputFile().c_str()));
-  } else if (output_format == "json") {
-    listeners()->SetDefaultXmlGenerator(new JsonUnitTestResultPrinter(
-        UnitTestOptions::GetAbsolutePathToOutputFile().c_str()));
-  } else if (output_format != "") {
-    GTEST_LOG_(WARNING) << "WARNING: unrecognized output format \""
-                        << output_format << "\" ignored.";
-  }
-}
-
-#if GTEST_CAN_STREAM_RESULTS_
-// Initializes event listeners for streaming test results in string form.
-// Must not be called before InitGoogleTest.
-void UnitTestImpl::ConfigureStreamingOutput() {
-  const std::string& target = GTEST_FLAG(stream_result_to);
-  if (!target.empty()) {
-    const size_t pos = target.find(':');
-    if (pos != std::string::npos) {
-      listeners()->Append(new StreamingListener(target.substr(0, pos),
-                                                target.substr(pos+1)));
-    } else {
-      GTEST_LOG_(WARNING) << "unrecognized streaming target \"" << target
-                          << "\" ignored.";
-    }
-  }
-}
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-// Performs initialization dependent upon flag values obtained in
-// ParseGoogleTestFlagsOnly.  Is called from InitGoogleTest after the call to
-// ParseGoogleTestFlagsOnly.  In case a user neglects to call InitGoogleTest
-// this function is also called from RunAllTests.  Since this function can be
-// called more than once, it has to be idempotent.
-void UnitTestImpl::PostFlagParsingInit() {
-  // Ensures that this function does not execute more than once.
-  if (!post_flag_parse_init_performed_) {
-    post_flag_parse_init_performed_ = true;
-
-#if defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)
-    // Register to send notifications about key process state changes.
-    listeners()->Append(new GTEST_CUSTOM_TEST_EVENT_LISTENER_());
-#endif  // defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)
-
-#if GTEST_HAS_DEATH_TEST
-    InitDeathTestSubprocessControlInfo();
-    SuppressTestEventsIfInSubprocess();
-#endif  // GTEST_HAS_DEATH_TEST
-
-    // Registers parameterized tests. This makes parameterized tests
-    // available to the UnitTest reflection API without running
-    // RUN_ALL_TESTS.
-    RegisterParameterizedTests();
-
-    // Configures listeners for XML output. This makes it possible for users
-    // to shut down the default XML output before invoking RUN_ALL_TESTS.
-    ConfigureXmlOutput();
-
-#if GTEST_CAN_STREAM_RESULTS_
-    // Configures listeners for streaming test results to the specified server.
-    ConfigureStreamingOutput();
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-#if GTEST_HAS_ABSL
-    if (GTEST_FLAG(install_failure_signal_handler)) {
-      absl::FailureSignalHandlerOptions options;
-      absl::InstallFailureSignalHandler(options);
-    }
-#endif  // GTEST_HAS_ABSL
-  }
-}
-
-// A predicate that checks the name of a TestSuite against a known
-// value.
-//
-// This is used for implementation of the UnitTest class only.  We put
-// it in the anonymous namespace to prevent polluting the outer
-// namespace.
-//
-// TestSuiteNameIs is copyable.
-class TestSuiteNameIs {
- public:
-  // Constructor.
-  explicit TestSuiteNameIs(const std::string& name) : name_(name) {}
-
-  // Returns true if and only if the name of test_suite matches name_.
-  bool operator()(const TestSuite* test_suite) const {
-    return test_suite != nullptr &&
-           strcmp(test_suite->name(), name_.c_str()) == 0;
-  }
-
- private:
-  std::string name_;
-};
-
-// Finds and returns a TestSuite with the given name.  If one doesn't
-// exist, creates one and returns it.  It's the CALLER'S
-// RESPONSIBILITY to ensure that this function is only called WHEN THE
-// TESTS ARE NOT SHUFFLED.
-//
-// Arguments:
-//
-//   test_suite_name: name of the test suite
-//   type_param:     the name of the test suite's type parameter, or NULL if
-//                   this is not a typed or a type-parameterized test suite.
-//   set_up_tc:      pointer to the function that sets up the test suite
-//   tear_down_tc:   pointer to the function that tears down the test suite
-TestSuite* UnitTestImpl::GetTestSuite(
-    const char* test_suite_name, const char* type_param,
-    internal::SetUpTestSuiteFunc set_up_tc,
-    internal::TearDownTestSuiteFunc tear_down_tc) {
-  // Can we find a TestSuite with the given name?
-  const auto test_suite =
-      std::find_if(test_suites_.rbegin(), test_suites_.rend(),
-                   TestSuiteNameIs(test_suite_name));
-
-  if (test_suite != test_suites_.rend()) return *test_suite;
-
-  // No.  Let's create one.
-  auto* const new_test_suite =
-      new TestSuite(test_suite_name, type_param, set_up_tc, tear_down_tc);
-
-  // Is this a death test suite?
-  if (internal::UnitTestOptions::MatchesFilter(test_suite_name,
-                                               kDeathTestSuiteFilter)) {
-    // Yes.  Inserts the test suite after the last death test suite
-    // defined so far.  This only works when the test suites haven't
-    // been shuffled.  Otherwise we may end up running a death test
-    // after a non-death test.
-    ++last_death_test_suite_;
-    test_suites_.insert(test_suites_.begin() + last_death_test_suite_,
-                        new_test_suite);
-  } else {
-    // No.  Appends to the end of the list.
-    test_suites_.push_back(new_test_suite);
-  }
-
-  test_suite_indices_.push_back(static_cast<int>(test_suite_indices_.size()));
-  return new_test_suite;
-}
-
-// Helpers for setting up / tearing down the given environment.  They
-// are for use in the ForEach() function.
-static void SetUpEnvironment(Environment* env) { env->SetUp(); }
-static void TearDownEnvironment(Environment* env) { env->TearDown(); }
-
-// Runs all tests in this UnitTest object, prints the result, and
-// returns true if all tests are successful.  If any exception is
-// thrown during a test, the test is considered to be failed, but the
-// rest of the tests will still be run.
-//
-// When parameterized tests are enabled, it expands and registers
-// parameterized tests first in RegisterParameterizedTests().
-// All other functions called from RunAllTests() may safely assume that
-// parameterized tests are ready to be counted and run.
-bool UnitTestImpl::RunAllTests() {
-  // True if and only if Google Test is initialized before RUN_ALL_TESTS() is
-  // called.
-  const bool gtest_is_initialized_before_run_all_tests = GTestIsInitialized();
-
-  // Do not run any test if the --help flag was specified.
-  if (g_help_flag)
-    return true;
-
-  // Repeats the call to the post-flag parsing initialization in case the
-  // user didn't call InitGoogleTest.
-  PostFlagParsingInit();
-
-  // Even if sharding is not on, test runners may want to use the
-  // GTEST_SHARD_STATUS_FILE to query whether the test supports the sharding
-  // protocol.
-  internal::WriteToShardStatusFileIfNeeded();
-
-  // True if and only if we are in a subprocess for running a thread-safe-style
-  // death test.
-  bool in_subprocess_for_death_test = false;
-
-#if GTEST_HAS_DEATH_TEST
-  in_subprocess_for_death_test =
-      (internal_run_death_test_flag_.get() != nullptr);
-# if defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
-  if (in_subprocess_for_death_test) {
-    GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_();
-  }
-# endif  // defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
-#endif  // GTEST_HAS_DEATH_TEST
-
-  const bool should_shard = ShouldShard(kTestTotalShards, kTestShardIndex,
-                                        in_subprocess_for_death_test);
-
-  // Compares the full test names with the filter to decide which
-  // tests to run.
-  const bool has_tests_to_run = FilterTests(should_shard
-                                              ? HONOR_SHARDING_PROTOCOL
-                                              : IGNORE_SHARDING_PROTOCOL) > 0;
-
-  // Lists the tests and exits if the --gtest_list_tests flag was specified.
-  if (GTEST_FLAG(list_tests)) {
-    // This must be called *after* FilterTests() has been called.
-    ListTestsMatchingFilter();
-    return true;
-  }
-
-  random_seed_ = GTEST_FLAG(shuffle) ?
-      GetRandomSeedFromFlag(GTEST_FLAG(random_seed)) : 0;
-
-  // True if and only if at least one test has failed.
-  bool failed = false;
-
-  TestEventListener* repeater = listeners()->repeater();
-
-  start_timestamp_ = GetTimeInMillis();
-  repeater->OnTestProgramStart(*parent_);
-
-  // How many times to repeat the tests?  We don't want to repeat them
-  // when we are inside the subprocess of a death test.
-  const int repeat = in_subprocess_for_death_test ? 1 : GTEST_FLAG(repeat);
-  // Repeats forever if the repeat count is negative.
-  const bool gtest_repeat_forever = repeat < 0;
-  for (int i = 0; gtest_repeat_forever || i != repeat; i++) {
-    // We want to preserve failures generated by ad-hoc test
-    // assertions executed before RUN_ALL_TESTS().
-    ClearNonAdHocTestResult();
-
-    const TimeInMillis start = GetTimeInMillis();
-
-    // Shuffles test suites and tests if requested.
-    if (has_tests_to_run && GTEST_FLAG(shuffle)) {
-      random()->Reseed(static_cast<UInt32>(random_seed_));
-      // This should be done before calling OnTestIterationStart(),
-      // such that a test event listener can see the actual test order
-      // in the event.
-      ShuffleTests();
-    }
-
-    // Tells the unit test event listeners that the tests are about to start.
-    repeater->OnTestIterationStart(*parent_, i);
-
-    // Runs each test suite if there is at least one test to run.
-    if (has_tests_to_run) {
-      // Sets up all environments beforehand.
-      repeater->OnEnvironmentsSetUpStart(*parent_);
-      ForEach(environments_, SetUpEnvironment);
-      repeater->OnEnvironmentsSetUpEnd(*parent_);
-
-      // Runs the tests only if there was no fatal failure or skip triggered
-      // during global set-up.
-      if (Test::IsSkipped()) {
-        // Emit diagnostics when global set-up calls skip, as it will not be
-        // emitted by default.
-        TestResult& test_result =
-            *internal::GetUnitTestImpl()->current_test_result();
-        for (int j = 0; j < test_result.total_part_count(); ++j) {
-          const TestPartResult& test_part_result =
-              test_result.GetTestPartResult(j);
-          if (test_part_result.type() == TestPartResult::kSkip) {
-            const std::string& result = test_part_result.message();
-            printf("%s\n", result.c_str());
-          }
-        }
-        fflush(stdout);
-      } else if (!Test::HasFatalFailure()) {
-        for (int test_index = 0; test_index < total_test_suite_count();
-             test_index++) {
-          GetMutableSuiteCase(test_index)->Run();
-        }
-      }
-
-      // Tears down all environments in reverse order afterwards.
-      repeater->OnEnvironmentsTearDownStart(*parent_);
-      std::for_each(environments_.rbegin(), environments_.rend(),
-                    TearDownEnvironment);
-      repeater->OnEnvironmentsTearDownEnd(*parent_);
-    }
-
-    elapsed_time_ = GetTimeInMillis() - start;
-
-    // Tells the unit test event listener that the tests have just finished.
-    repeater->OnTestIterationEnd(*parent_, i);
-
-    // Gets the result and clears it.
-    if (!Passed()) {
-      failed = true;
-    }
-
-    // Restores the original test order after the iteration.  This
-    // allows the user to quickly repro a failure that happens in the
-    // N-th iteration without repeating the first (N - 1) iterations.
-    // This is not enclosed in "if (GTEST_FLAG(shuffle)) { ... }", in
-    // case the user somehow changes the value of the flag somewhere
-    // (it's always safe to unshuffle the tests).
-    UnshuffleTests();
-
-    if (GTEST_FLAG(shuffle)) {
-      // Picks a new random seed for each iteration.
-      random_seed_ = GetNextRandomSeed(random_seed_);
-    }
-  }
-
-  repeater->OnTestProgramEnd(*parent_);
-
-  if (!gtest_is_initialized_before_run_all_tests) {
-    ColoredPrintf(
-        COLOR_RED,
-        "\nIMPORTANT NOTICE - DO NOT IGNORE:\n"
-        "This test program did NOT call " GTEST_INIT_GOOGLE_TEST_NAME_
-        "() before calling RUN_ALL_TESTS(). This is INVALID. Soon " GTEST_NAME_
-        " will start to enforce the valid usage. "
-        "Please fix it ASAP, or IT WILL START TO FAIL.\n");  // NOLINT
-#if GTEST_FOR_GOOGLE_
-    ColoredPrintf(COLOR_RED,
-                  "For more details, see http://wiki/Main/ValidGUnitMain.\n");
-#endif  // GTEST_FOR_GOOGLE_
-  }
-
-  return !failed;
-}
-
-// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
-// if the variable is present. If a file already exists at this location, this
-// function will write over it. If the variable is present, but the file cannot
-// be created, prints an error and exits.
-void WriteToShardStatusFileIfNeeded() {
-  const char* const test_shard_file = posix::GetEnv(kTestShardStatusFile);
-  if (test_shard_file != nullptr) {
-    FILE* const file = posix::FOpen(test_shard_file, "w");
-    if (file == nullptr) {
-      ColoredPrintf(COLOR_RED,
-                    "Could not write to the test shard status file \"%s\" "
-                    "specified by the %s environment variable.\n",
-                    test_shard_file, kTestShardStatusFile);
-      fflush(stdout);
-      exit(EXIT_FAILURE);
-    }
-    fclose(file);
-  }
-}
-
-// Checks whether sharding is enabled by examining the relevant
-// environment variable values. If the variables are present,
-// but inconsistent (i.e., shard_index >= total_shards), prints
-// an error and exits. If in_subprocess_for_death_test, sharding is
-// disabled because it must only be applied to the original test
-// process. Otherwise, we could filter out death tests we intended to execute.
-bool ShouldShard(const char* total_shards_env,
-                 const char* shard_index_env,
-                 bool in_subprocess_for_death_test) {
-  if (in_subprocess_for_death_test) {
-    return false;
-  }
-
-  const Int32 total_shards = Int32FromEnvOrDie(total_shards_env, -1);
-  const Int32 shard_index = Int32FromEnvOrDie(shard_index_env, -1);
-
-  if (total_shards == -1 && shard_index == -1) {
-    return false;
-  } else if (total_shards == -1 && shard_index != -1) {
-    const Message msg = Message()
-      << "Invalid environment variables: you have "
-      << kTestShardIndex << " = " << shard_index
-      << ", but have left " << kTestTotalShards << " unset.\n";
-    ColoredPrintf(COLOR_RED, "%s", msg.GetString().c_str());
-    fflush(stdout);
-    exit(EXIT_FAILURE);
-  } else if (total_shards != -1 && shard_index == -1) {
-    const Message msg = Message()
-      << "Invalid environment variables: you have "
-      << kTestTotalShards << " = " << total_shards
-      << ", but have left " << kTestShardIndex << " unset.\n";
-    ColoredPrintf(COLOR_RED, "%s", msg.GetString().c_str());
-    fflush(stdout);
-    exit(EXIT_FAILURE);
-  } else if (shard_index < 0 || shard_index >= total_shards) {
-    const Message msg = Message()
-      << "Invalid environment variables: we require 0 <= "
-      << kTestShardIndex << " < " << kTestTotalShards
-      << ", but you have " << kTestShardIndex << "=" << shard_index
-      << ", " << kTestTotalShards << "=" << total_shards << ".\n";
-    ColoredPrintf(COLOR_RED, "%s", msg.GetString().c_str());
-    fflush(stdout);
-    exit(EXIT_FAILURE);
-  }
-
-  return total_shards > 1;
-}
-
-// Parses the environment variable var as an Int32. If it is unset,
-// returns default_val. If it is not an Int32, prints an error
-// and aborts.
-Int32 Int32FromEnvOrDie(const char* var, Int32 default_val) {
-  const char* str_val = posix::GetEnv(var);
-  if (str_val == nullptr) {
-    return default_val;
-  }
-
-  Int32 result;
-  if (!ParseInt32(Message() << "The value of environment variable " << var,
-                  str_val, &result)) {
-    exit(EXIT_FAILURE);
-  }
-  return result;
-}
-
-// Given the total number of shards, the shard index, and the test id,
-// returns true if and only if the test should be run on this shard. The test id
-// is some arbitrary but unique non-negative integer assigned to each test
-// method. Assumes that 0 <= shard_index < total_shards.
-bool ShouldRunTestOnShard(int total_shards, int shard_index, int test_id) {
-  return (test_id % total_shards) == shard_index;
-}
-
-// Compares the name of each test with the user-specified filter to
-// decide whether the test should be run, then records the result in
-// each TestSuite and TestInfo object.
-// If shard_tests == true, further filters tests based on sharding
-// variables in the environment - see
-// https://github.com/google/googletest/blob/master/googletest/docs/advanced.md
-// . Returns the number of tests that should run.
-int UnitTestImpl::FilterTests(ReactionToSharding shard_tests) {
-  const Int32 total_shards = shard_tests == HONOR_SHARDING_PROTOCOL ?
-      Int32FromEnvOrDie(kTestTotalShards, -1) : -1;
-  const Int32 shard_index = shard_tests == HONOR_SHARDING_PROTOCOL ?
-      Int32FromEnvOrDie(kTestShardIndex, -1) : -1;
-
-  // num_runnable_tests are the number of tests that will
-  // run across all shards (i.e., match filter and are not disabled).
-  // num_selected_tests are the number of tests to be run on
-  // this shard.
-  int num_runnable_tests = 0;
-  int num_selected_tests = 0;
-  for (auto* test_suite : test_suites_) {
-    const std::string& test_suite_name = test_suite->name();
-    test_suite->set_should_run(false);
-
-    for (size_t j = 0; j < test_suite->test_info_list().size(); j++) {
-      TestInfo* const test_info = test_suite->test_info_list()[j];
-      const std::string test_name(test_info->name());
-      // A test is disabled if test suite name or test name matches
-      // kDisableTestFilter.
-      const bool is_disabled = internal::UnitTestOptions::MatchesFilter(
-                                   test_suite_name, kDisableTestFilter) ||
-                               internal::UnitTestOptions::MatchesFilter(
-                                   test_name, kDisableTestFilter);
-      test_info->is_disabled_ = is_disabled;
-
-      const bool matches_filter = internal::UnitTestOptions::FilterMatchesTest(
-          test_suite_name, test_name);
-      test_info->matches_filter_ = matches_filter;
-
-      const bool is_runnable =
-          (GTEST_FLAG(also_run_disabled_tests) || !is_disabled) &&
-          matches_filter;
-
-      const bool is_in_another_shard =
-          shard_tests != IGNORE_SHARDING_PROTOCOL &&
-          !ShouldRunTestOnShard(total_shards, shard_index, num_runnable_tests);
-      test_info->is_in_another_shard_ = is_in_another_shard;
-      const bool is_selected = is_runnable && !is_in_another_shard;
-
-      num_runnable_tests += is_runnable;
-      num_selected_tests += is_selected;
-
-      test_info->should_run_ = is_selected;
-      test_suite->set_should_run(test_suite->should_run() || is_selected);
-    }
-  }
-  return num_selected_tests;
-}
-
-// Prints the given C-string on a single line by replacing all '\n'
-// characters with string "\\n".  If the output takes more than
-// max_length characters, only prints the first max_length characters
-// and "...".
-static void PrintOnOneLine(const char* str, int max_length) {
-  if (str != nullptr) {
-    for (int i = 0; *str != '\0'; ++str) {
-      if (i >= max_length) {
-        printf("...");
-        break;
-      }
-      if (*str == '\n') {
-        printf("\\n");
-        i += 2;
-      } else {
-        printf("%c", *str);
-        ++i;
-      }
-    }
-  }
-}
-
-// Prints the names of the tests matching the user-specified filter flag.
-void UnitTestImpl::ListTestsMatchingFilter() {
-  // Print at most this many characters for each type/value parameter.
-  const int kMaxParamLength = 250;
-
-  for (auto* test_suite : test_suites_) {
-    bool printed_test_suite_name = false;
-
-    for (size_t j = 0; j < test_suite->test_info_list().size(); j++) {
-      const TestInfo* const test_info = test_suite->test_info_list()[j];
-      if (test_info->matches_filter_) {
-        if (!printed_test_suite_name) {
-          printed_test_suite_name = true;
-          printf("%s.", test_suite->name());
-          if (test_suite->type_param() != nullptr) {
-            printf("  # %s = ", kTypeParamLabel);
-            // We print the type parameter on a single line to make
-            // the output easy to parse by a program.
-            PrintOnOneLine(test_suite->type_param(), kMaxParamLength);
-          }
-          printf("\n");
-        }
-        printf("  %s", test_info->name());
-        if (test_info->value_param() != nullptr) {
-          printf("  # %s = ", kValueParamLabel);
-          // We print the value parameter on a single line to make the
-          // output easy to parse by a program.
-          PrintOnOneLine(test_info->value_param(), kMaxParamLength);
-        }
-        printf("\n");
-      }
-    }
-  }
-  fflush(stdout);
-  const std::string& output_format = UnitTestOptions::GetOutputFormat();
-  if (output_format == "xml" || output_format == "json") {
-    FILE* fileout = OpenFileForWriting(
-        UnitTestOptions::GetAbsolutePathToOutputFile().c_str());
-    std::stringstream stream;
-    if (output_format == "xml") {
-      XmlUnitTestResultPrinter(
-          UnitTestOptions::GetAbsolutePathToOutputFile().c_str())
-          .PrintXmlTestsList(&stream, test_suites_);
-    } else if (output_format == "json") {
-      JsonUnitTestResultPrinter(
-          UnitTestOptions::GetAbsolutePathToOutputFile().c_str())
-          .PrintJsonTestList(&stream, test_suites_);
-    }
-    fprintf(fileout, "%s", StringStreamToString(&stream).c_str());
-    fclose(fileout);
-  }
-}
-
-// Sets the OS stack trace getter.
-//
-// Does nothing if the input and the current OS stack trace getter are
-// the same; otherwise, deletes the old getter and makes the input the
-// current getter.
-void UnitTestImpl::set_os_stack_trace_getter(
-    OsStackTraceGetterInterface* getter) {
-  if (os_stack_trace_getter_ != getter) {
-    delete os_stack_trace_getter_;
-    os_stack_trace_getter_ = getter;
-  }
-}
-
-// Returns the current OS stack trace getter if it is not NULL;
-// otherwise, creates an OsStackTraceGetter, makes it the current
-// getter, and returns it.
-OsStackTraceGetterInterface* UnitTestImpl::os_stack_trace_getter() {
-  if (os_stack_trace_getter_ == nullptr) {
-#ifdef GTEST_OS_STACK_TRACE_GETTER_
-    os_stack_trace_getter_ = new GTEST_OS_STACK_TRACE_GETTER_;
-#else
-    os_stack_trace_getter_ = new OsStackTraceGetter;
-#endif  // GTEST_OS_STACK_TRACE_GETTER_
-  }
-
-  return os_stack_trace_getter_;
-}
-
-// Returns the most specific TestResult currently running.
-TestResult* UnitTestImpl::current_test_result() {
-  if (current_test_info_ != nullptr) {
-    return &current_test_info_->result_;
-  }
-  if (current_test_suite_ != nullptr) {
-    return &current_test_suite_->ad_hoc_test_result_;
-  }
-  return &ad_hoc_test_result_;
-}
-
-// Shuffles all test suites, and the tests within each test suite,
-// making sure that death tests are still run first.
-void UnitTestImpl::ShuffleTests() {
-  // Shuffles the death test suites.
-  ShuffleRange(random(), 0, last_death_test_suite_ + 1, &test_suite_indices_);
-
-  // Shuffles the non-death test suites.
-  ShuffleRange(random(), last_death_test_suite_ + 1,
-               static_cast<int>(test_suites_.size()), &test_suite_indices_);
-
-  // Shuffles the tests inside each test suite.
-  for (auto& test_suite : test_suites_) {
-    test_suite->ShuffleTests(random());
-  }
-}
-
-// Restores the test suites and tests to their order before the first shuffle.
-void UnitTestImpl::UnshuffleTests() {
-  for (size_t i = 0; i < test_suites_.size(); i++) {
-    // Unshuffles the tests in each test suite.
-    test_suites_[i]->UnshuffleTests();
-    // Resets the index of each test suite.
-    test_suite_indices_[i] = static_cast<int>(i);
-  }
-}
-
-// Returns the current OS stack trace as an std::string.
-//
-// The maximum number of stack frames to be included is specified by
-// the gtest_stack_trace_depth flag.  The skip_count parameter
-// specifies the number of top frames to be skipped, which doesn't
-// count against the number of frames to be included.
-//
-// For example, if Foo() calls Bar(), which in turn calls
-// GetCurrentOsStackTraceExceptTop(..., 1), Foo() will be included in
-// the trace but Bar() and GetCurrentOsStackTraceExceptTop() won't.
-std::string GetCurrentOsStackTraceExceptTop(UnitTest* /*unit_test*/,
-                                            int skip_count) {
-  // We pass skip_count + 1 to skip this wrapper function in addition
-  // to what the user really wants to skip.
-  return GetUnitTestImpl()->CurrentOsStackTraceExceptTop(skip_count + 1);
-}
-
-// Used by the GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_ macro to
-// suppress unreachable code warnings.
-namespace {
-class ClassUniqueToAlwaysTrue {};
-}
-
-bool IsTrue(bool condition) { return condition; }
-
-bool AlwaysTrue() {
-#if GTEST_HAS_EXCEPTIONS
-  // This condition is always false so AlwaysTrue() never actually throws,
-  // but it makes the compiler think that it may throw.
-  if (IsTrue(false))
-    throw ClassUniqueToAlwaysTrue();
-#endif  // GTEST_HAS_EXCEPTIONS
-  return true;
-}
-
-// If *pstr starts with the given prefix, modifies *pstr to be right
-// past the prefix and returns true; otherwise leaves *pstr unchanged
-// and returns false.  None of pstr, *pstr, and prefix can be NULL.
-bool SkipPrefix(const char* prefix, const char** pstr) {
-  const size_t prefix_len = strlen(prefix);
-  if (strncmp(*pstr, prefix, prefix_len) == 0) {
-    *pstr += prefix_len;
-    return true;
-  }
-  return false;
-}
-
-// Parses a string as a command line flag.  The string should have
-// the format "--flag=value".  When def_optional is true, the "=value"
-// part can be omitted.
-//
-// Returns the value of the flag, or NULL if the parsing failed.
-static const char* ParseFlagValue(const char* str, const char* flag,
-                                  bool def_optional) {
-  // str and flag must not be NULL.
-  if (str == nullptr || flag == nullptr) return nullptr;
-
-  // The flag must start with "--" followed by GTEST_FLAG_PREFIX_.
-  const std::string flag_str = std::string("--") + GTEST_FLAG_PREFIX_ + flag;
-  const size_t flag_len = flag_str.length();
-  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
-
-  // Skips the flag name.
-  const char* flag_end = str + flag_len;
-
-  // When def_optional is true, it's OK to not have a "=value" part.
-  if (def_optional && (flag_end[0] == '\0')) {
-    return flag_end;
-  }
-
-  // If def_optional is true and there are more characters after the
-  // flag name, or if def_optional is false, there must be a '=' after
-  // the flag name.
-  if (flag_end[0] != '=') return nullptr;
-
-  // Returns the string after "=".
-  return flag_end + 1;
-}
-
-// Parses a string for a bool flag, in the form of either
-// "--flag=value" or "--flag".
-//
-// In the former case, the value is taken as true as long as it does
-// not start with '0', 'f', or 'F'.
-//
-// In the latter case, the value is taken as true.
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-static bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, true);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Converts the string value to a bool.
-  *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');
-  return true;
-}
-
-// Parses a string for an Int32 flag, in the form of
-// "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseInt32Flag(const char* str, const char* flag, Int32* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  return ParseInt32(Message() << "The value of flag --" << flag,
-                    value_str, value);
-}
-
-// Parses a string for a string flag, in the form of
-// "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-template <typename String>
-static bool ParseStringFlag(const char* str, const char* flag, String* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  *value = value_str;
-  return true;
-}
-
-// Determines whether a string has a prefix that Google Test uses for its
-// flags, i.e., starts with GTEST_FLAG_PREFIX_ or GTEST_FLAG_PREFIX_DASH_.
-// If Google Test detects that a command line flag has its prefix but is not
-// recognized, it will print its help message. Flags starting with
-// GTEST_INTERNAL_PREFIX_ followed by "internal_" are considered Google Test
-// internal flags and do not trigger the help message.
-static bool HasGoogleTestFlagPrefix(const char* str) {
-  return (SkipPrefix("--", &str) ||
-          SkipPrefix("-", &str) ||
-          SkipPrefix("/", &str)) &&
-         !SkipPrefix(GTEST_FLAG_PREFIX_ "internal_", &str) &&
-         (SkipPrefix(GTEST_FLAG_PREFIX_, &str) ||
-          SkipPrefix(GTEST_FLAG_PREFIX_DASH_, &str));
-}
-
-// Prints a string containing code-encoded text.  The following escape
-// sequences can be used in the string to control the text color:
-//
-//   @@    prints a single '@' character.
-//   @R    changes the color to red.
-//   @G    changes the color to green.
-//   @Y    changes the color to yellow.
-//   @D    changes to the default terminal text color.
-//
-static void PrintColorEncoded(const char* str) {
-  GTestColor color = COLOR_DEFAULT;  // The current color.
-
-  // Conceptually, we split the string into segments divided by escape
-  // sequences.  Then we print one segment at a time.  At the end of
-  // each iteration, the str pointer advances to the beginning of the
-  // next segment.
-  for (;;) {
-    const char* p = strchr(str, '@');
-    if (p == nullptr) {
-      ColoredPrintf(color, "%s", str);
-      return;
-    }
-
-    ColoredPrintf(color, "%s", std::string(str, p).c_str());
-
-    const char ch = p[1];
-    str = p + 2;
-    if (ch == '@') {
-      ColoredPrintf(color, "@");
-    } else if (ch == 'D') {
-      color = COLOR_DEFAULT;
-    } else if (ch == 'R') {
-      color = COLOR_RED;
-    } else if (ch == 'G') {
-      color = COLOR_GREEN;
-    } else if (ch == 'Y') {
-      color = COLOR_YELLOW;
-    } else {
-      --str;
-    }
-  }
-}
-
-static const char kColorEncodedHelpMessage[] =
-"This program contains tests written using " GTEST_NAME_ ". You can use the\n"
-"following command line flags to control its behavior:\n"
-"\n"
-"Test Selection:\n"
-"  @G--" GTEST_FLAG_PREFIX_ "list_tests@D\n"
-"      List the names of all tests instead of running them. The name of\n"
-"      TEST(Foo, Bar) is \"Foo.Bar\".\n"
-"  @G--" GTEST_FLAG_PREFIX_ "filter=@YPOSTIVE_PATTERNS"
-    "[@G-@YNEGATIVE_PATTERNS]@D\n"
-"      Run only the tests whose name matches one of the positive patterns but\n"
-"      none of the negative patterns. '?' matches any single character; '*'\n"
-"      matches any substring; ':' separates two patterns.\n"
-"  @G--" GTEST_FLAG_PREFIX_ "also_run_disabled_tests@D\n"
-"      Run all disabled tests too.\n"
-"\n"
-"Test Execution:\n"
-"  @G--" GTEST_FLAG_PREFIX_ "repeat=@Y[COUNT]@D\n"
-"      Run the tests repeatedly; use a negative count to repeat forever.\n"
-"  @G--" GTEST_FLAG_PREFIX_ "shuffle@D\n"
-"      Randomize tests' orders on every iteration.\n"
-"  @G--" GTEST_FLAG_PREFIX_ "random_seed=@Y[NUMBER]@D\n"
-"      Random number seed to use for shuffling test orders (between 1 and\n"
-"      99999, or 0 to use a seed based on the current time).\n"
-"\n"
-"Test Output:\n"
-"  @G--" GTEST_FLAG_PREFIX_ "color=@Y(@Gyes@Y|@Gno@Y|@Gauto@Y)@D\n"
-"      Enable/disable colored output. The default is @Gauto@D.\n"
-"  -@G-" GTEST_FLAG_PREFIX_ "print_time=0@D\n"
-"      Don't print the elapsed time of each test.\n"
-"  @G--" GTEST_FLAG_PREFIX_ "output=@Y(@Gjson@Y|@Gxml@Y)[@G:@YDIRECTORY_PATH@G"
-    GTEST_PATH_SEP_ "@Y|@G:@YFILE_PATH]@D\n"
-"      Generate a JSON or XML report in the given directory or with the given\n"
-"      file name. @YFILE_PATH@D defaults to @Gtest_detail.xml@D.\n"
-# if GTEST_CAN_STREAM_RESULTS_
-"  @G--" GTEST_FLAG_PREFIX_ "stream_result_to=@YHOST@G:@YPORT@D\n"
-"      Stream test results to the given server.\n"
-# endif  // GTEST_CAN_STREAM_RESULTS_
-"\n"
-"Assertion Behavior:\n"
-# if GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
-"  @G--" GTEST_FLAG_PREFIX_ "death_test_style=@Y(@Gfast@Y|@Gthreadsafe@Y)@D\n"
-"      Set the default death test style.\n"
-# endif  // GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
-"  @G--" GTEST_FLAG_PREFIX_ "break_on_failure@D\n"
-"      Turn assertion failures into debugger break-points.\n"
-"  @G--" GTEST_FLAG_PREFIX_ "throw_on_failure@D\n"
-"      Turn assertion failures into C++ exceptions for use by an external\n"
-"      test framework.\n"
-"  @G--" GTEST_FLAG_PREFIX_ "catch_exceptions=0@D\n"
-"      Do not report exceptions as test failures. Instead, allow them\n"
-"      to crash the program or throw a pop-up (on Windows).\n"
-"\n"
-"Except for @G--" GTEST_FLAG_PREFIX_ "list_tests@D, you can alternatively set "
-    "the corresponding\n"
-"environment variable of a flag (all letters in upper-case). For example, to\n"
-"disable colored text output, you can either specify @G--" GTEST_FLAG_PREFIX_
-    "color=no@D or set\n"
-"the @G" GTEST_FLAG_PREFIX_UPPER_ "COLOR@D environment variable to @Gno@D.\n"
-"\n"
-"For more information, please read the " GTEST_NAME_ " documentation at\n"
-"@G" GTEST_PROJECT_URL_ "@D. If you find a bug in " GTEST_NAME_ "\n"
-"(not one in your own code or tests), please report it to\n"
-"@G<" GTEST_DEV_EMAIL_ ">@D.\n";
-
-static bool ParseGoogleTestFlag(const char* const arg) {
-  return ParseBoolFlag(arg, kAlsoRunDisabledTestsFlag,
-                       &GTEST_FLAG(also_run_disabled_tests)) ||
-      ParseBoolFlag(arg, kBreakOnFailureFlag,
-                    &GTEST_FLAG(break_on_failure)) ||
-      ParseBoolFlag(arg, kCatchExceptionsFlag,
-                    &GTEST_FLAG(catch_exceptions)) ||
-      ParseStringFlag(arg, kColorFlag, &GTEST_FLAG(color)) ||
-      ParseStringFlag(arg, kDeathTestStyleFlag,
-                      &GTEST_FLAG(death_test_style)) ||
-      ParseBoolFlag(arg, kDeathTestUseFork,
-                    &GTEST_FLAG(death_test_use_fork)) ||
-      ParseStringFlag(arg, kFilterFlag, &GTEST_FLAG(filter)) ||
-      ParseStringFlag(arg, kInternalRunDeathTestFlag,
-                      &GTEST_FLAG(internal_run_death_test)) ||
-      ParseBoolFlag(arg, kListTestsFlag, &GTEST_FLAG(list_tests)) ||
-      ParseStringFlag(arg, kOutputFlag, &GTEST_FLAG(output)) ||
-      ParseBoolFlag(arg, kPrintTimeFlag, &GTEST_FLAG(print_time)) ||
-      ParseBoolFlag(arg, kPrintUTF8Flag, &GTEST_FLAG(print_utf8)) ||
-      ParseInt32Flag(arg, kRandomSeedFlag, &GTEST_FLAG(random_seed)) ||
-      ParseInt32Flag(arg, kRepeatFlag, &GTEST_FLAG(repeat)) ||
-      ParseBoolFlag(arg, kShuffleFlag, &GTEST_FLAG(shuffle)) ||
-      ParseInt32Flag(arg, kStackTraceDepthFlag,
-                     &GTEST_FLAG(stack_trace_depth)) ||
-      ParseStringFlag(arg, kStreamResultToFlag,
-                      &GTEST_FLAG(stream_result_to)) ||
-      ParseBoolFlag(arg, kThrowOnFailureFlag,
-                    &GTEST_FLAG(throw_on_failure));
-}
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-static void LoadFlagsFromFile(const std::string& path) {
-  FILE* flagfile = posix::FOpen(path.c_str(), "r");
-  if (!flagfile) {
-    GTEST_LOG_(FATAL) << "Unable to open file \"" << GTEST_FLAG(flagfile)
-                      << "\"";
-  }
-  std::string contents(ReadEntireFile(flagfile));
-  posix::FClose(flagfile);
-  std::vector<std::string> lines;
-  SplitString(contents, '\n', &lines);
-  for (size_t i = 0; i < lines.size(); ++i) {
-    if (lines[i].empty())
-      continue;
-    if (!ParseGoogleTestFlag(lines[i].c_str()))
-      g_help_flag = true;
-  }
-}
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-// Parses the command line for Google Test flags, without initializing
-// other parts of Google Test.  The type parameter CharType can be
-// instantiated to either char or wchar_t.
-template <typename CharType>
-void ParseGoogleTestFlagsOnlyImpl(int* argc, CharType** argv) {
-  for (int i = 1; i < *argc; i++) {
-    const std::string arg_string = StreamableToString(argv[i]);
-    const char* const arg = arg_string.c_str();
-
-    using internal::ParseBoolFlag;
-    using internal::ParseInt32Flag;
-    using internal::ParseStringFlag;
-
-    bool remove_flag = false;
-    if (ParseGoogleTestFlag(arg)) {
-      remove_flag = true;
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-    } else if (ParseStringFlag(arg, kFlagfileFlag, &GTEST_FLAG(flagfile))) {
-      LoadFlagsFromFile(GTEST_FLAG(flagfile));
-      remove_flag = true;
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-    } else if (arg_string == "--help" || arg_string == "-h" ||
-               arg_string == "-?" || arg_string == "/?" ||
-               HasGoogleTestFlagPrefix(arg)) {
-      // Both help flag and unrecognized Google Test flags (excluding
-      // internal ones) trigger help display.
-      g_help_flag = true;
-    }
-
-    if (remove_flag) {
-      // Shift the remainder of the argv list left by one.  Note
-      // that argv has (*argc + 1) elements, the last one always being
-      // NULL.  The following loop moves the trailing NULL element as
-      // well.
-      for (int j = i; j != *argc; j++) {
-        argv[j] = argv[j + 1];
-      }
-
-      // Decrements the argument count.
-      (*argc)--;
-
-      // We also need to decrement the iterator as we just removed
-      // an element.
-      i--;
-    }
-  }
-
-  if (g_help_flag) {
-    // We print the help here instead of in RUN_ALL_TESTS(), as the
-    // latter may not be called at all if the user is using Google
-    // Test with another testing framework.
-    PrintColorEncoded(kColorEncodedHelpMessage);
-  }
-}
-
-// Parses the command line for Google Test flags, without initializing
-// other parts of Google Test.
-void ParseGoogleTestFlagsOnly(int* argc, char** argv) {
-  ParseGoogleTestFlagsOnlyImpl(argc, argv);
-
-  // Fix the value of *_NSGetArgc() on macOS, but if and only if
-  // *_NSGetArgv() == argv
-  // Only applicable to char** version of argv
-#if GTEST_OS_MAC
-#ifndef GTEST_OS_IOS
-  if (*_NSGetArgv() == argv) {
-    *_NSGetArgc() = *argc;
-  }
-#endif
-#endif
-}
-void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv) {
-  ParseGoogleTestFlagsOnlyImpl(argc, argv);
-}
-
-// The internal implementation of InitGoogleTest().
-//
-// The type parameter CharType can be instantiated to either char or
-// wchar_t.
-template <typename CharType>
-void InitGoogleTestImpl(int* argc, CharType** argv) {
-  // We don't want to run the initialization code twice.
-  if (GTestIsInitialized()) return;
-
-  if (*argc <= 0) return;
-
-  g_argvs.clear();
-  for (int i = 0; i != *argc; i++) {
-    g_argvs.push_back(StreamableToString(argv[i]));
-  }
-
-#if GTEST_HAS_ABSL
-  absl::InitializeSymbolizer(g_argvs[0].c_str());
-#endif  // GTEST_HAS_ABSL
-
-  ParseGoogleTestFlagsOnly(argc, argv);
-  GetUnitTestImpl()->PostFlagParsingInit();
-}
-
-}  // namespace internal
-
-// Initializes Google Test.  This must be called before calling
-// RUN_ALL_TESTS().  In particular, it parses a command line for the
-// flags that Google Test recognizes.  Whenever a Google Test flag is
-// seen, it is removed from argv, and *argc is decremented.
-//
-// No value is returned.  Instead, the Google Test flag variables are
-// updated.
-//
-// Calling the function for the second time has no user-visible effect.
-void InitGoogleTest(int* argc, char** argv) {
-#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
-#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  internal::InitGoogleTestImpl(argc, argv);
-#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-}
-
-// This overloaded version can be used in Windows programs compiled in
-// UNICODE mode.
-void InitGoogleTest(int* argc, wchar_t** argv) {
-#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
-#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  internal::InitGoogleTestImpl(argc, argv);
-#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-}
-
-// This overloaded version can be used on Arduino/embedded platforms where
-// there is no argc/argv.
-void InitGoogleTest() {
-  // Since Arduino doesn't have a command line, fake out the argc/argv arguments
-  int argc = 1;
-  const auto arg0 = "dummy";
-  char* argv0 = const_cast<char*>(arg0);
-  char** argv = &argv0;
-
-#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(&argc, argv);
-#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  internal::InitGoogleTestImpl(&argc, argv);
-#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-}
-
-std::string TempDir() {
-#if defined(GTEST_CUSTOM_TEMPDIR_FUNCTION_)
-  return GTEST_CUSTOM_TEMPDIR_FUNCTION_();
-#endif
-
-#if GTEST_OS_WINDOWS_MOBILE
-  return "\\temp\\";
-#elif GTEST_OS_WINDOWS
-  const char* temp_dir = internal::posix::GetEnv("TEMP");
-  if (temp_dir == nullptr || temp_dir[0] == '\0')
-    return "\\temp\\";
-  else if (temp_dir[strlen(temp_dir) - 1] == '\\')
-    return temp_dir;
-  else
-    return std::string(temp_dir) + "\\";
-#elif GTEST_OS_LINUX_ANDROID
-  return "/sdcard/";
-#else
-  return "/tmp/";
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-// Class ScopedTrace
-
-// Pushes the given source file location and message onto a per-thread
-// trace stack maintained by Google Test.
-void ScopedTrace::PushTrace(const char* file, int line, std::string message) {
-  internal::TraceInfo trace;
-  trace.file = file;
-  trace.line = line;
-  trace.message.swap(message);
-
-  UnitTest::GetInstance()->PushGTestTrace(trace);
-}
-
-// Pops the info pushed by the c'tor.
-ScopedTrace::~ScopedTrace()
-    GTEST_LOCK_EXCLUDED_(&UnitTest::mutex_) {
-  UnitTest::GetInstance()->PopGTestTrace();
-}
-
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest_main.cc b/3rdparty/gtest/src/gtest_main.cc
deleted file mode 100644
index f6e1dd96..00000000
--- a/3rdparty/gtest/src/gtest_main.cc
+++ /dev/null
@@ -1,47 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include <cstdio>
-#include "gtest/gtest.h"
-
-#ifdef ARDUINO
-void setup() {
-  testing::InitGoogleTest();
-}
-
-void loop() { RUN_ALL_TESTS(); }
-
-#else
-
-GTEST_API_ int main(int argc, char **argv) {
-  printf("Running main() from %s\n", __FILE__);
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-#endif
diff --git a/3rdparty/gtest/test/BUILD.bazel b/3rdparty/gtest/test/BUILD.bazel
deleted file mode 100644
index 156d5d4b..00000000
--- a/3rdparty/gtest/test/BUILD.bazel
+++ /dev/null
@@ -1,521 +0,0 @@
-# Copyright 2017 Google Inc.
-# All Rights Reserved.
-#
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#
-# Author: misterg@google.com (Gennadiy Civil)
-#
-# Bazel BUILD for The Google C++ Testing Framework (Google Test)
-
-load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_test")
-load("@rules_python//python:defs.bzl", "py_library", "py_test")
-
-licenses(["notice"])
-
-#on windows exclude gtest-tuple.h
-cc_test(
-    name = "gtest_all_test",
-    size = "small",
-    srcs = glob(
-        include = [
-            "gtest-*.cc",
-            "googletest-*.cc",
-            "*.h",
-            "googletest/include/gtest/**/*.h",
-        ],
-        exclude = [
-            "gtest-unittest-api_test.cc",
-            "googletest/src/gtest-all.cc",
-            "gtest_all_test.cc",
-            "gtest-death-test_ex_test.cc",
-            "gtest-listener_test.cc",
-            "gtest-unittest-api_test.cc",
-            "googletest-param-test-test.cc",
-            "googletest-catch-exceptions-test_.cc",
-            "googletest-color-test_.cc",
-            "googletest-env-var-test_.cc",
-            "googletest-filter-unittest_.cc",
-            "googletest-break-on-failure-unittest_.cc",
-            "googletest-listener-test.cc",
-            "googletest-output-test_.cc",
-            "googletest-list-tests-unittest_.cc",
-            "googletest-shuffle-test_.cc",
-            "googletest-uninitialized-test_.cc",
-            "googletest-death-test_ex_test.cc",
-            "googletest-param-test-test",
-            "googletest-throw-on-failure-test_.cc",
-            "googletest-param-test-invalid-name1-test_.cc",
-            "googletest-param-test-invalid-name2-test_.cc",
-        ],
-    ) + select({
-        "//:windows": [],
-        "//conditions:default": [],
-    }),
-    copts = select({
-        "//:windows": ["-DGTEST_USE_OWN_TR1_TUPLE=0"],
-        "//conditions:default": ["-DGTEST_USE_OWN_TR1_TUPLE=1"],
-    }),
-    includes = [
-        "googletest",
-        "googletest/include",
-        "googletest/include/internal",
-        "googletest/test",
-    ],
-    linkopts = select({
-        "//:windows": [],
-        "//conditions:default": ["-pthread"],
-    }),
-    deps = ["//:gtest_main"],
-)
-
-# Tests death tests.
-cc_test(
-    name = "googletest-death-test-test",
-    size = "medium",
-    srcs = ["googletest-death-test-test.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_test(
-    name = "gtest_test_macro_stack_footprint_test",
-    size = "small",
-    srcs = ["gtest_test_macro_stack_footprint_test.cc"],
-    deps = ["//:gtest"],
-)
-
-#These googletest tests have their own main()
-cc_test(
-    name = "googletest-listener-test",
-    size = "small",
-    srcs = ["googletest-listener-test.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_test(
-    name = "gtest-unittest-api_test",
-    size = "small",
-    srcs = [
-        "gtest-unittest-api_test.cc",
-    ],
-    deps = [
-        "//:gtest",
-    ],
-)
-
-cc_test(
-    name = "googletest-param-test-test",
-    size = "small",
-    srcs = [
-        "googletest-param-test-test.cc",
-        "googletest-param-test-test.h",
-        "googletest-param-test2-test.cc",
-    ],
-    deps = ["//:gtest"],
-)
-
-cc_test(
-    name = "gtest_unittest",
-    size = "small",
-    srcs = ["gtest_unittest.cc"],
-    args = ["--heap_check=strict"],
-    shard_count = 2,
-    deps = ["//:gtest_main"],
-)
-
-#  Py tests
-
-py_library(
-    name = "gtest_test_utils",
-    testonly = 1,
-    srcs = ["gtest_test_utils.py"],
-)
-
-cc_binary(
-    name = "gtest_help_test_",
-    testonly = 1,
-    srcs = ["gtest_help_test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "gtest_help_test",
-    size = "small",
-    srcs = ["gtest_help_test.py"],
-    data = [":gtest_help_test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-output-test_",
-    testonly = 1,
-    srcs = ["googletest-output-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-output-test",
-    size = "small",
-    srcs = ["googletest-output-test.py"],
-    args = select({
-        "//:has_absl": [],
-        "//conditions:default": ["--no_stacktrace_support"],
-    }),
-    data = [
-        "googletest-output-test-golden-lin.txt",
-        ":googletest-output-test_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-color-test_",
-    testonly = 1,
-    srcs = ["googletest-color-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-color-test",
-    size = "small",
-    srcs = ["googletest-color-test.py"],
-    data = [":googletest-color-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-env-var-test_",
-    testonly = 1,
-    srcs = ["googletest-env-var-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-env-var-test",
-    size = "medium",
-    srcs = ["googletest-env-var-test.py"],
-    data = [":googletest-env-var-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-filter-unittest_",
-    testonly = 1,
-    srcs = ["googletest-filter-unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-filter-unittest",
-    size = "medium",
-    srcs = ["googletest-filter-unittest.py"],
-    data = [":googletest-filter-unittest_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-break-on-failure-unittest_",
-    testonly = 1,
-    srcs = ["googletest-break-on-failure-unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-break-on-failure-unittest",
-    size = "small",
-    srcs = ["googletest-break-on-failure-unittest.py"],
-    data = [":googletest-break-on-failure-unittest_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_test(
-    name = "gtest_assert_by_exception_test",
-    size = "small",
-    srcs = ["gtest_assert_by_exception_test.cc"],
-    deps = ["//:gtest"],
-)
-
-cc_binary(
-    name = "googletest-throw-on-failure-test_",
-    testonly = 1,
-    srcs = ["googletest-throw-on-failure-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-throw-on-failure-test",
-    size = "small",
-    srcs = ["googletest-throw-on-failure-test.py"],
-    data = [":googletest-throw-on-failure-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-list-tests-unittest_",
-    testonly = 1,
-    srcs = ["googletest-list-tests-unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-cc_test(
-    name = "gtest_skip_test",
-    size = "small",
-    srcs = ["gtest_skip_test.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_test(
-    name = "gtest_skip_in_environment_setup_test",
-    size = "small",
-    srcs = ["gtest_skip_in_environment_setup_test.cc"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "gtest_skip_environment_check_output_test",
-    size = "small",
-    srcs = ["gtest_skip_environment_check_output_test.py"],
-    data = [
-        ":gtest_skip_in_environment_setup_test",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-py_test(
-    name = "googletest-list-tests-unittest",
-    size = "small",
-    srcs = ["googletest-list-tests-unittest.py"],
-    data = [":googletest-list-tests-unittest_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-shuffle-test_",
-    srcs = ["googletest-shuffle-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-shuffle-test",
-    size = "small",
-    srcs = ["googletest-shuffle-test.py"],
-    data = [":googletest-shuffle-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-catch-exceptions-no-ex-test_",
-    testonly = 1,
-    srcs = ["googletest-catch-exceptions-test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_binary(
-    name = "googletest-catch-exceptions-ex-test_",
-    testonly = 1,
-    srcs = ["googletest-catch-exceptions-test_.cc"],
-    copts = ["-fexceptions"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "googletest-catch-exceptions-test",
-    size = "small",
-    srcs = ["googletest-catch-exceptions-test.py"],
-    data = [
-        ":googletest-catch-exceptions-ex-test_",
-        ":googletest-catch-exceptions-no-ex-test_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "gtest_xml_output_unittest_",
-    testonly = 1,
-    srcs = ["gtest_xml_output_unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-cc_test(
-    name = "gtest_no_test_unittest",
-    size = "small",
-    srcs = ["gtest_no_test_unittest.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "gtest_xml_output_unittest",
-    size = "small",
-    srcs = [
-        "gtest_xml_output_unittest.py",
-        "gtest_xml_test_utils.py",
-    ],
-    args = select({
-        "//:has_absl": [],
-        "//conditions:default": ["--no_stacktrace_support"],
-    }),
-    data = [
-        # We invoke gtest_no_test_unittest to verify the XML output
-        # when the test program contains no test definition.
-        ":gtest_no_test_unittest",
-        ":gtest_xml_output_unittest_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "gtest_xml_outfile1_test_",
-    testonly = 1,
-    srcs = ["gtest_xml_outfile1_test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_binary(
-    name = "gtest_xml_outfile2_test_",
-    testonly = 1,
-    srcs = ["gtest_xml_outfile2_test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "gtest_xml_outfiles_test",
-    size = "small",
-    srcs = [
-        "gtest_xml_outfiles_test.py",
-        "gtest_xml_test_utils.py",
-    ],
-    data = [
-        ":gtest_xml_outfile1_test_",
-        ":gtest_xml_outfile2_test_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-uninitialized-test_",
-    testonly = 1,
-    srcs = ["googletest-uninitialized-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-uninitialized-test",
-    size = "medium",
-    srcs = ["googletest-uninitialized-test.py"],
-    data = ["googletest-uninitialized-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "gtest_testbridge_test_",
-    testonly = 1,
-    srcs = ["gtest_testbridge_test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-# Tests that filtering via testbridge works
-py_test(
-    name = "gtest_testbridge_test",
-    size = "small",
-    srcs = ["gtest_testbridge_test.py"],
-    data = [":gtest_testbridge_test_"],
-    deps = [":gtest_test_utils"],
-)
-
-py_test(
-    name = "googletest-json-outfiles-test",
-    size = "small",
-    srcs = [
-        "googletest-json-outfiles-test.py",
-        "gtest_json_test_utils.py",
-    ],
-    data = [
-        ":gtest_xml_outfile1_test_",
-        ":gtest_xml_outfile2_test_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-py_test(
-    name = "googletest-json-output-unittest",
-    size = "medium",
-    srcs = [
-        "googletest-json-output-unittest.py",
-        "gtest_json_test_utils.py",
-    ],
-    args = select({
-        "//:has_absl": [],
-        "//conditions:default": ["--no_stacktrace_support"],
-    }),
-    data = [
-        # We invoke gtest_no_test_unittest to verify the JSON output
-        # when the test program contains no test definition.
-        ":gtest_no_test_unittest",
-        ":gtest_xml_output_unittest_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-# Verifies interaction of death tests and exceptions.
-cc_test(
-    name = "googletest-death-test_ex_catch_test",
-    size = "medium",
-    srcs = ["googletest-death-test_ex_test.cc"],
-    copts = ["-fexceptions"],
-    defines = ["GTEST_ENABLE_CATCH_EXCEPTIONS_=1"],
-    deps = ["//:gtest"],
-)
-
-cc_binary(
-    name = "googletest-param-test-invalid-name1-test_",
-    testonly = 1,
-    srcs = ["googletest-param-test-invalid-name1-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-cc_binary(
-    name = "googletest-param-test-invalid-name2-test_",
-    testonly = 1,
-    srcs = ["googletest-param-test-invalid-name2-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-param-test-invalid-name1-test",
-    size = "small",
-    srcs = ["googletest-param-test-invalid-name1-test.py"],
-    data = [":googletest-param-test-invalid-name1-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-py_test(
-    name = "googletest-param-test-invalid-name2-test",
-    size = "small",
-    srcs = ["googletest-param-test-invalid-name2-test.py"],
-    data = [":googletest-param-test-invalid-name2-test_"],
-    deps = [":gtest_test_utils"],
-)
diff --git a/3rdparty/gtest/test/googletest-break-on-failure-unittest.py b/3rdparty/gtest/test/googletest-break-on-failure-unittest.py
deleted file mode 100644
index a5dfbc69..00000000
--- a/3rdparty/gtest/test/googletest-break-on-failure-unittest.py
+++ /dev/null
@@ -1,208 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for Google Test's break-on-failure mode.
-
-A user can ask Google Test to seg-fault when an assertion fails, using
-either the GTEST_BREAK_ON_FAILURE environment variable or the
---gtest_break_on_failure flag.  This script tests such functionality
-by invoking googletest-break-on-failure-unittest_ (a program written with
-Google Test) with different environments and command line flags.
-"""
-
-import os
-import gtest_test_utils
-
-# Constants.
-
-IS_WINDOWS = os.name == 'nt'
-
-# The environment variable for enabling/disabling the break-on-failure mode.
-BREAK_ON_FAILURE_ENV_VAR = 'GTEST_BREAK_ON_FAILURE'
-
-# The command line flag for enabling/disabling the break-on-failure mode.
-BREAK_ON_FAILURE_FLAG = 'gtest_break_on_failure'
-
-# The environment variable for enabling/disabling the throw-on-failure mode.
-THROW_ON_FAILURE_ENV_VAR = 'GTEST_THROW_ON_FAILURE'
-
-# The environment variable for enabling/disabling the catch-exceptions mode.
-CATCH_EXCEPTIONS_ENV_VAR = 'GTEST_CATCH_EXCEPTIONS'
-
-# Path to the googletest-break-on-failure-unittest_ program.
-EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'googletest-break-on-failure-unittest_')
-
-
-environ = gtest_test_utils.environ
-SetEnvVar = gtest_test_utils.SetEnvVar
-
-# Tests in this file run a Google-Test-based test program and expect it
-# to terminate prematurely.  Therefore they are incompatible with
-# the premature-exit-file protocol by design.  Unset the
-# premature-exit filepath to prevent Google Test from creating
-# the file.
-SetEnvVar(gtest_test_utils.PREMATURE_EXIT_FILE_ENV_VAR, None)
-
-
-def Run(command):
-  """Runs a command; returns 1 if it was killed by a signal, or 0 otherwise."""
-
-  p = gtest_test_utils.Subprocess(command, env=environ)
-  if p.terminated_by_signal:
-    return 1
-  else:
-    return 0
-
-
-# The tests.
-
-
-class GTestBreakOnFailureUnitTest(gtest_test_utils.TestCase):
-  """Tests using the GTEST_BREAK_ON_FAILURE environment variable or
-  the --gtest_break_on_failure flag to turn assertion failures into
-  segmentation faults.
-  """
-
-  def RunAndVerify(self, env_var_value, flag_value, expect_seg_fault):
-    """Runs googletest-break-on-failure-unittest_ and verifies that it does
-    (or does not) have a seg-fault.
-
-    Args:
-      env_var_value:    value of the GTEST_BREAK_ON_FAILURE environment
-                        variable; None if the variable should be unset.
-      flag_value:       value of the --gtest_break_on_failure flag;
-                        None if the flag should not be present.
-      expect_seg_fault: 1 if the program is expected to generate a seg-fault;
-                        0 otherwise.
-    """
-
-    SetEnvVar(BREAK_ON_FAILURE_ENV_VAR, env_var_value)
-
-    if env_var_value is None:
-      env_var_value_msg = ' is not set'
-    else:
-      env_var_value_msg = '=' + env_var_value
-
-    if flag_value is None:
-      flag = ''
-    elif flag_value == '0':
-      flag = '--%s=0' % BREAK_ON_FAILURE_FLAG
-    else:
-      flag = '--%s' % BREAK_ON_FAILURE_FLAG
-
-    command = [EXE_PATH]
-    if flag:
-      command.append(flag)
-
-    if expect_seg_fault:
-      should_or_not = 'should'
-    else:
-      should_or_not = 'should not'
-
-    has_seg_fault = Run(command)
-
-    SetEnvVar(BREAK_ON_FAILURE_ENV_VAR, None)
-
-    msg = ('when %s%s, an assertion failure in "%s" %s cause a seg-fault.' %
-           (BREAK_ON_FAILURE_ENV_VAR, env_var_value_msg, ' '.join(command),
-            should_or_not))
-    self.assert_(has_seg_fault == expect_seg_fault, msg)
-
-  def testDefaultBehavior(self):
-    """Tests the behavior of the default mode."""
-
-    self.RunAndVerify(env_var_value=None,
-                      flag_value=None,
-                      expect_seg_fault=0)
-
-  def testEnvVar(self):
-    """Tests using the GTEST_BREAK_ON_FAILURE environment variable."""
-
-    self.RunAndVerify(env_var_value='0',
-                      flag_value=None,
-                      expect_seg_fault=0)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value=None,
-                      expect_seg_fault=1)
-
-  def testFlag(self):
-    """Tests using the --gtest_break_on_failure flag."""
-
-    self.RunAndVerify(env_var_value=None,
-                      flag_value='0',
-                      expect_seg_fault=0)
-    self.RunAndVerify(env_var_value=None,
-                      flag_value='1',
-                      expect_seg_fault=1)
-
-  def testFlagOverridesEnvVar(self):
-    """Tests that the flag overrides the environment variable."""
-
-    self.RunAndVerify(env_var_value='0',
-                      flag_value='0',
-                      expect_seg_fault=0)
-    self.RunAndVerify(env_var_value='0',
-                      flag_value='1',
-                      expect_seg_fault=1)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value='0',
-                      expect_seg_fault=0)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value='1',
-                      expect_seg_fault=1)
-
-  def testBreakOnFailureOverridesThrowOnFailure(self):
-    """Tests that gtest_break_on_failure overrides gtest_throw_on_failure."""
-
-    SetEnvVar(THROW_ON_FAILURE_ENV_VAR, '1')
-    try:
-      self.RunAndVerify(env_var_value=None,
-                        flag_value='1',
-                        expect_seg_fault=1)
-    finally:
-      SetEnvVar(THROW_ON_FAILURE_ENV_VAR, None)
-
-  if IS_WINDOWS:
-    def testCatchExceptionsDoesNotInterfere(self):
-      """Tests that gtest_catch_exceptions doesn't interfere."""
-
-      SetEnvVar(CATCH_EXCEPTIONS_ENV_VAR, '1')
-      try:
-        self.RunAndVerify(env_var_value='1',
-                          flag_value='1',
-                          expect_seg_fault=1)
-      finally:
-        SetEnvVar(CATCH_EXCEPTIONS_ENV_VAR, None)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-break-on-failure-unittest_.cc b/3rdparty/gtest/test/googletest-break-on-failure-unittest_.cc
deleted file mode 100644
index f84957a2..00000000
--- a/3rdparty/gtest/test/googletest-break-on-failure-unittest_.cc
+++ /dev/null
@@ -1,86 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Unit test for Google Test's break-on-failure mode.
-//
-// A user can ask Google Test to seg-fault when an assertion fails, using
-// either the GTEST_BREAK_ON_FAILURE environment variable or the
-// --gtest_break_on_failure flag.  This file is used for testing such
-// functionality.
-//
-// This program will be invoked from a Python unit test.  It is
-// expected to fail.  Don't run it directly.
-
-#include "gtest/gtest.h"
-
-#if GTEST_OS_WINDOWS
-# include <windows.h>
-# include <stdlib.h>
-#endif
-
-namespace {
-
-// A test that's expected to fail.
-TEST(Foo, Bar) {
-  EXPECT_EQ(2, 3);
-}
-
-#if GTEST_HAS_SEH && !GTEST_OS_WINDOWS_MOBILE
-// On Windows Mobile global exception handlers are not supported.
-LONG WINAPI ExitWithExceptionCode(
-    struct _EXCEPTION_POINTERS* exception_pointers) {
-  exit(exception_pointers->ExceptionRecord->ExceptionCode);
-}
-#endif
-
-}  // namespace
-
-int main(int argc, char **argv) {
-#if GTEST_OS_WINDOWS
-  // Suppresses display of the Windows error dialog upon encountering
-  // a general protection fault (segment violation).
-  SetErrorMode(SEM_NOGPFAULTERRORBOX | SEM_FAILCRITICALERRORS);
-
-# if GTEST_HAS_SEH && !GTEST_OS_WINDOWS_MOBILE
-
-  // The default unhandled exception filter does not always exit
-  // with the exception code as exit code - for example it exits with
-  // 0 for EXCEPTION_ACCESS_VIOLATION and 1 for EXCEPTION_BREAKPOINT
-  // if the application is compiled in debug mode. Thus we use our own
-  // filter which always exits with the exception code for unhandled
-  // exceptions.
-  SetUnhandledExceptionFilter(ExitWithExceptionCode);
-
-# endif
-#endif  // GTEST_OS_WINDOWS
-  testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-catch-exceptions-test.py b/3rdparty/gtest/test/googletest-catch-exceptions-test.py
deleted file mode 100644
index 94a5b33f..00000000
--- a/3rdparty/gtest/test/googletest-catch-exceptions-test.py
+++ /dev/null
@@ -1,236 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2010 Google Inc.  All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Tests Google Test's exception catching behavior.
-
-This script invokes googletest-catch-exceptions-test_ and
-googletest-catch-exceptions-ex-test_ (programs written with
-Google Test) and verifies their output.
-"""
-
-import gtest_test_utils
-
-# Constants.
-FLAG_PREFIX = '--gtest_'
-LIST_TESTS_FLAG = FLAG_PREFIX + 'list_tests'
-NO_CATCH_EXCEPTIONS_FLAG = FLAG_PREFIX + 'catch_exceptions=0'
-FILTER_FLAG = FLAG_PREFIX + 'filter'
-
-# Path to the googletest-catch-exceptions-ex-test_ binary, compiled with
-# exceptions enabled.
-EX_EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'googletest-catch-exceptions-ex-test_')
-
-# Path to the googletest-catch-exceptions-test_ binary, compiled with
-# exceptions disabled.
-EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'googletest-catch-exceptions-no-ex-test_')
-
-environ = gtest_test_utils.environ
-SetEnvVar = gtest_test_utils.SetEnvVar
-
-# Tests in this file run a Google-Test-based test program and expect it
-# to terminate prematurely.  Therefore they are incompatible with
-# the premature-exit-file protocol by design.  Unset the
-# premature-exit filepath to prevent Google Test from creating
-# the file.
-SetEnvVar(gtest_test_utils.PREMATURE_EXIT_FILE_ENV_VAR, None)
-
-TEST_LIST = gtest_test_utils.Subprocess(
-    [EXE_PATH, LIST_TESTS_FLAG], env=environ).output
-
-SUPPORTS_SEH_EXCEPTIONS = 'ThrowsSehException' in TEST_LIST
-
-if SUPPORTS_SEH_EXCEPTIONS:
-  BINARY_OUTPUT = gtest_test_utils.Subprocess([EXE_PATH], env=environ).output
-
-EX_BINARY_OUTPUT = gtest_test_utils.Subprocess(
-    [EX_EXE_PATH], env=environ).output
-
-
-# The tests.
-if SUPPORTS_SEH_EXCEPTIONS:
-  # pylint:disable-msg=C6302
-  class CatchSehExceptionsTest(gtest_test_utils.TestCase):
-    """Tests exception-catching behavior."""
-
-
-    def TestSehExceptions(self, test_output):
-      self.assert_('SEH exception with code 0x2a thrown '
-                   'in the test fixture\'s constructor'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown '
-                   'in the test fixture\'s destructor'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in SetUpTestSuite()'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in TearDownTestSuite()'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in SetUp()'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in TearDown()'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in the test body'
-                   in test_output)
-
-    def testCatchesSehExceptionsWithCxxExceptionsEnabled(self):
-      self.TestSehExceptions(EX_BINARY_OUTPUT)
-
-    def testCatchesSehExceptionsWithCxxExceptionsDisabled(self):
-      self.TestSehExceptions(BINARY_OUTPUT)
-
-
-class CatchCxxExceptionsTest(gtest_test_utils.TestCase):
-  """Tests C++ exception-catching behavior.
-
-     Tests in this test case verify that:
-     * C++ exceptions are caught and logged as C++ (not SEH) exceptions
-     * Exception thrown affect the remainder of the test work flow in the
-       expected manner.
-  """
-
-  def testCatchesCxxExceptionsInFixtureConstructor(self):
-    self.assertTrue(
-        'C++ exception with description '
-        '"Standard C++ exception" thrown '
-        'in the test fixture\'s constructor' in EX_BINARY_OUTPUT,
-        EX_BINARY_OUTPUT)
-    self.assert_('unexpected' not in EX_BINARY_OUTPUT,
-                 'This failure belongs in this test only if '
-                 '"CxxExceptionInConstructorTest" (no quotes) '
-                 'appears on the same line as words "called unexpectedly"')
-
-  if ('CxxExceptionInDestructorTest.ThrowsExceptionInDestructor' in
-      EX_BINARY_OUTPUT):
-
-    def testCatchesCxxExceptionsInFixtureDestructor(self):
-      self.assertTrue(
-          'C++ exception with description '
-          '"Standard C++ exception" thrown '
-          'in the test fixture\'s destructor' in EX_BINARY_OUTPUT,
-          EX_BINARY_OUTPUT)
-      self.assertTrue(
-          'CxxExceptionInDestructorTest::TearDownTestSuite() '
-          'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesCxxExceptionsInSetUpTestCase(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in SetUpTestSuite()' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInConstructorTest::TearDownTestSuite() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest constructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest destructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest::SetUp() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest::TearDown() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest test body '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesCxxExceptionsInTearDownTestCase(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in TearDownTestSuite()' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesCxxExceptionsInSetUp(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in SetUp()' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTest::TearDownTestSuite() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTest destructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTest::TearDown() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assert_('unexpected' not in EX_BINARY_OUTPUT,
-                 'This failure belongs in this test only if '
-                 '"CxxExceptionInSetUpTest" (no quotes) '
-                 'appears on the same line as words "called unexpectedly"')
-
-  def testCatchesCxxExceptionsInTearDown(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in TearDown()' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTearDownTest::TearDownTestSuite() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTearDownTest destructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesCxxExceptionsInTestBody(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in the test body' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTestBodyTest::TearDownTestSuite() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTestBodyTest destructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTestBodyTest::TearDown() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesNonStdCxxExceptions(self):
-    self.assertTrue(
-        'Unknown C++ exception thrown in the test body' in EX_BINARY_OUTPUT,
-        EX_BINARY_OUTPUT)
-
-  def testUnhandledCxxExceptionsAbortTheProgram(self):
-    # Filters out SEH exception tests on Windows. Unhandled SEH exceptions
-    # cause tests to show pop-up windows there.
-    FITLER_OUT_SEH_TESTS_FLAG = FILTER_FLAG + '=-*Seh*'
-    # By default, Google Test doesn't catch the exceptions.
-    uncaught_exceptions_ex_binary_output = gtest_test_utils.Subprocess(
-        [EX_EXE_PATH,
-         NO_CATCH_EXCEPTIONS_FLAG,
-         FITLER_OUT_SEH_TESTS_FLAG],
-        env=environ).output
-
-    self.assert_('Unhandled C++ exception terminating the program'
-                 in uncaught_exceptions_ex_binary_output)
-    self.assert_('unexpected' not in uncaught_exceptions_ex_binary_output)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-catch-exceptions-test_.cc b/3rdparty/gtest/test/googletest-catch-exceptions-test_.cc
deleted file mode 100644
index 8c127d40..00000000
--- a/3rdparty/gtest/test/googletest-catch-exceptions-test_.cc
+++ /dev/null
@@ -1,293 +0,0 @@
-// Copyright 2010, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself. Tests in this file throw C++ or SEH
-// exceptions, and the output is verified by
-// googletest-catch-exceptions-test.py.
-
-#include <stdio.h>  // NOLINT
-#include <stdlib.h>  // For exit().
-
-#include "gtest/gtest.h"
-
-#if GTEST_HAS_SEH
-# include <windows.h>
-#endif
-
-#if GTEST_HAS_EXCEPTIONS
-# include <exception>  // For set_terminate().
-# include <stdexcept>
-#endif
-
-using testing::Test;
-
-#if GTEST_HAS_SEH
-
-class SehExceptionInConstructorTest : public Test {
- public:
-  SehExceptionInConstructorTest() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInConstructorTest, ThrowsExceptionInConstructor) {}
-
-class SehExceptionInDestructorTest : public Test {
- public:
-  ~SehExceptionInDestructorTest() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInDestructorTest, ThrowsExceptionInDestructor) {}
-
-class SehExceptionInSetUpTestSuiteTest : public Test {
- public:
-  static void SetUpTestSuite() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInSetUpTestSuiteTest, ThrowsExceptionInSetUpTestSuite) {}
-
-class SehExceptionInTearDownTestSuiteTest : public Test {
- public:
-  static void TearDownTestSuite() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInTearDownTestSuiteTest,
-       ThrowsExceptionInTearDownTestSuite) {}
-
-class SehExceptionInSetUpTest : public Test {
- protected:
-  virtual void SetUp() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInSetUpTest, ThrowsExceptionInSetUp) {}
-
-class SehExceptionInTearDownTest : public Test {
- protected:
-  virtual void TearDown() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInTearDownTest, ThrowsExceptionInTearDown) {}
-
-TEST(SehExceptionTest, ThrowsSehException) {
-  RaiseException(42, 0, 0, NULL);
-}
-
-#endif  // GTEST_HAS_SEH
-
-#if GTEST_HAS_EXCEPTIONS
-
-class CxxExceptionInConstructorTest : public Test {
- public:
-  CxxExceptionInConstructorTest() {
-    // Without this macro VC++ complains about unreachable code at the end of
-    // the constructor.
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(
-        throw std::runtime_error("Standard C++ exception"));
-  }
-
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInConstructorTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInConstructorTest() override {
-    ADD_FAILURE() << "CxxExceptionInConstructorTest destructor "
-                  << "called unexpectedly.";
-  }
-
-  void SetUp() override {
-    ADD_FAILURE() << "CxxExceptionInConstructorTest::SetUp() "
-                  << "called unexpectedly.";
-  }
-
-  void TearDown() override {
-    ADD_FAILURE() << "CxxExceptionInConstructorTest::TearDown() "
-                  << "called unexpectedly.";
-  }
-};
-
-TEST_F(CxxExceptionInConstructorTest, ThrowsExceptionInConstructor) {
-  ADD_FAILURE() << "CxxExceptionInConstructorTest test body "
-                << "called unexpectedly.";
-}
-
-class CxxExceptionInSetUpTestSuiteTest : public Test {
- public:
-  CxxExceptionInSetUpTestSuiteTest() {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest constructor "
-           "called as expected.\n");
-  }
-
-  static void SetUpTestSuite() {
-    throw std::runtime_error("Standard C++ exception");
-  }
-
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInSetUpTestSuiteTest() override {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest destructor "
-           "called as expected.\n");
-  }
-
-  void SetUp() override {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest::SetUp() "
-           "called as expected.\n");
-  }
-
-  void TearDown() override {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest::TearDown() "
-           "called as expected.\n");
-  }
-};
-
-TEST_F(CxxExceptionInSetUpTestSuiteTest, ThrowsExceptionInSetUpTestSuite) {
-  printf("%s",
-         "CxxExceptionInSetUpTestSuiteTest test body "
-         "called as expected.\n");
-}
-
-class CxxExceptionInTearDownTestSuiteTest : public Test {
- public:
-  static void TearDownTestSuite() {
-    throw std::runtime_error("Standard C++ exception");
-  }
-};
-
-TEST_F(CxxExceptionInTearDownTestSuiteTest,
-       ThrowsExceptionInTearDownTestSuite) {}
-
-class CxxExceptionInSetUpTest : public Test {
- public:
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInSetUpTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInSetUpTest() override {
-    printf("%s",
-           "CxxExceptionInSetUpTest destructor "
-           "called as expected.\n");
-  }
-
-  void SetUp() override { throw std::runtime_error("Standard C++ exception"); }
-
-  void TearDown() override {
-    printf("%s",
-           "CxxExceptionInSetUpTest::TearDown() "
-           "called as expected.\n");
-  }
-};
-
-TEST_F(CxxExceptionInSetUpTest, ThrowsExceptionInSetUp) {
-  ADD_FAILURE() << "CxxExceptionInSetUpTest test body "
-                << "called unexpectedly.";
-}
-
-class CxxExceptionInTearDownTest : public Test {
- public:
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInTearDownTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInTearDownTest() override {
-    printf("%s",
-           "CxxExceptionInTearDownTest destructor "
-           "called as expected.\n");
-  }
-
-  void TearDown() override {
-    throw std::runtime_error("Standard C++ exception");
-  }
-};
-
-TEST_F(CxxExceptionInTearDownTest, ThrowsExceptionInTearDown) {}
-
-class CxxExceptionInTestBodyTest : public Test {
- public:
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInTestBodyTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInTestBodyTest() override {
-    printf("%s",
-           "CxxExceptionInTestBodyTest destructor "
-           "called as expected.\n");
-  }
-
-  void TearDown() override {
-    printf("%s",
-           "CxxExceptionInTestBodyTest::TearDown() "
-           "called as expected.\n");
-  }
-};
-
-TEST_F(CxxExceptionInTestBodyTest, ThrowsStdCxxException) {
-  throw std::runtime_error("Standard C++ exception");
-}
-
-TEST(CxxExceptionTest, ThrowsNonStdCxxException) {
-  throw "C-string";
-}
-
-// This terminate handler aborts the program using exit() rather than abort().
-// This avoids showing pop-ups on Windows systems and core dumps on Unix-like
-// ones.
-void TerminateHandler() {
-  fprintf(stderr, "%s\n", "Unhandled C++ exception terminating the program.");
-  fflush(nullptr);
-  exit(3);
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-int main(int argc, char** argv) {
-#if GTEST_HAS_EXCEPTIONS
-  std::set_terminate(&TerminateHandler);
-#endif
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-color-test.py b/3rdparty/gtest/test/googletest-color-test.py
deleted file mode 100644
index f3b7c999..00000000
--- a/3rdparty/gtest/test/googletest-color-test.py
+++ /dev/null
@@ -1,127 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test correctly determines whether to use colors."""
-
-import os
-import gtest_test_utils
-
-IS_WINDOWS = os.name == 'nt'
-
-COLOR_ENV_VAR = 'GTEST_COLOR'
-COLOR_FLAG = 'gtest_color'
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-color-test_')
-
-
-def SetEnvVar(env_var, value):
-  """Sets the env variable to 'value'; unsets it when 'value' is None."""
-
-  if value is not None:
-    os.environ[env_var] = value
-  elif env_var in os.environ:
-    del os.environ[env_var]
-
-
-def UsesColor(term, color_env_var, color_flag):
-  """Runs googletest-color-test_ and returns its exit code."""
-
-  SetEnvVar('TERM', term)
-  SetEnvVar(COLOR_ENV_VAR, color_env_var)
-
-  if color_flag is None:
-    args = []
-  else:
-    args = ['--%s=%s' % (COLOR_FLAG, color_flag)]
-  p = gtest_test_utils.Subprocess([COMMAND] + args)
-  return not p.exited or p.exit_code
-
-
-class GTestColorTest(gtest_test_utils.TestCase):
-  def testNoEnvVarNoFlag(self):
-    """Tests the case when there's neither GTEST_COLOR nor --gtest_color."""
-
-    if not IS_WINDOWS:
-      self.assert_(not UsesColor('dumb', None, None))
-      self.assert_(not UsesColor('emacs', None, None))
-      self.assert_(not UsesColor('xterm-mono', None, None))
-      self.assert_(not UsesColor('unknown', None, None))
-      self.assert_(not UsesColor(None, None, None))
-    self.assert_(UsesColor('linux', None, None))
-    self.assert_(UsesColor('cygwin', None, None))
-    self.assert_(UsesColor('xterm', None, None))
-    self.assert_(UsesColor('xterm-color', None, None))
-    self.assert_(UsesColor('xterm-256color', None, None))
-
-  def testFlagOnly(self):
-    """Tests the case when there's --gtest_color but not GTEST_COLOR."""
-
-    self.assert_(not UsesColor('dumb', None, 'no'))
-    self.assert_(not UsesColor('xterm-color', None, 'no'))
-    if not IS_WINDOWS:
-      self.assert_(not UsesColor('emacs', None, 'auto'))
-    self.assert_(UsesColor('xterm', None, 'auto'))
-    self.assert_(UsesColor('dumb', None, 'yes'))
-    self.assert_(UsesColor('xterm', None, 'yes'))
-
-  def testEnvVarOnly(self):
-    """Tests the case when there's GTEST_COLOR but not --gtest_color."""
-
-    self.assert_(not UsesColor('dumb', 'no', None))
-    self.assert_(not UsesColor('xterm-color', 'no', None))
-    if not IS_WINDOWS:
-      self.assert_(not UsesColor('dumb', 'auto', None))
-    self.assert_(UsesColor('xterm-color', 'auto', None))
-    self.assert_(UsesColor('dumb', 'yes', None))
-    self.assert_(UsesColor('xterm-color', 'yes', None))
-
-  def testEnvVarAndFlag(self):
-    """Tests the case when there are both GTEST_COLOR and --gtest_color."""
-
-    self.assert_(not UsesColor('xterm-color', 'no', 'no'))
-    self.assert_(UsesColor('dumb', 'no', 'yes'))
-    self.assert_(UsesColor('xterm-color', 'no', 'auto'))
-
-  def testAliasesOfYesAndNo(self):
-    """Tests using aliases in specifying --gtest_color."""
-
-    self.assert_(UsesColor('dumb', None, 'true'))
-    self.assert_(UsesColor('dumb', None, 'YES'))
-    self.assert_(UsesColor('dumb', None, 'T'))
-    self.assert_(UsesColor('dumb', None, '1'))
-
-    self.assert_(not UsesColor('xterm', None, 'f'))
-    self.assert_(not UsesColor('xterm', None, 'false'))
-    self.assert_(not UsesColor('xterm', None, '0'))
-    self.assert_(not UsesColor('xterm', None, 'unknown'))
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-color-test_.cc b/3rdparty/gtest/test/googletest-color-test_.cc
deleted file mode 100644
index 220a3a00..00000000
--- a/3rdparty/gtest/test/googletest-color-test_.cc
+++ /dev/null
@@ -1,62 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// A helper program for testing how Google Test determines whether to use
-// colors in the output.  It prints "YES" and returns 1 if Google Test
-// decides to use colors, and prints "NO" and returns 0 otherwise.
-
-#include <stdio.h>
-
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-using testing::internal::ShouldUseColor;
-
-// The purpose of this is to ensure that the UnitTest singleton is
-// created before main() is entered, and thus that ShouldUseColor()
-// works the same way as in a real Google-Test-based test.  We don't actual
-// run the TEST itself.
-TEST(GTestColorTest, Dummy) {
-}
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  if (ShouldUseColor(true)) {
-    // Google Test decides to use colors in the output (assuming it
-    // goes to a TTY).
-    printf("YES\n");
-    return 1;
-  } else {
-    // Google Test decides not to use colors in the output.
-    printf("NO\n");
-    return 0;
-  }
-}
diff --git a/3rdparty/gtest/test/googletest-death-test-test.cc b/3rdparty/gtest/test/googletest-death-test-test.cc
deleted file mode 100644
index cba906cc..00000000
--- a/3rdparty/gtest/test/googletest-death-test-test.cc
+++ /dev/null
@@ -1,1516 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for death tests.
-
-#include "gtest/gtest-death-test.h"
-
-#include "gtest/gtest.h"
-#include "gtest/internal/gtest-filepath.h"
-
-using testing::internal::AlwaysFalse;
-using testing::internal::AlwaysTrue;
-
-#if GTEST_HAS_DEATH_TEST
-
-# if GTEST_OS_WINDOWS
-#  include <fcntl.h>           // For O_BINARY
-#  include <direct.h>          // For chdir().
-#  include <io.h>
-# else
-#  include <unistd.h>
-#  include <sys/wait.h>        // For waitpid.
-# endif  // GTEST_OS_WINDOWS
-
-# include <limits.h>
-# include <signal.h>
-# include <stdio.h>
-
-# if GTEST_OS_LINUX
-#  include <sys/time.h>
-# endif  // GTEST_OS_LINUX
-
-# include "gtest/gtest-spi.h"
-# include "src/gtest-internal-inl.h"
-
-namespace posix = ::testing::internal::posix;
-
-using testing::ContainsRegex;
-using testing::Matcher;
-using testing::Message;
-using testing::internal::DeathTest;
-using testing::internal::DeathTestFactory;
-using testing::internal::FilePath;
-using testing::internal::GetLastErrnoDescription;
-using testing::internal::GetUnitTestImpl;
-using testing::internal::InDeathTestChild;
-using testing::internal::ParseNaturalNumber;
-
-namespace testing {
-namespace internal {
-
-// A helper class whose objects replace the death test factory for a
-// single UnitTest object during their lifetimes.
-class ReplaceDeathTestFactory {
- public:
-  explicit ReplaceDeathTestFactory(DeathTestFactory* new_factory)
-      : unit_test_impl_(GetUnitTestImpl()) {
-    old_factory_ = unit_test_impl_->death_test_factory_.release();
-    unit_test_impl_->death_test_factory_.reset(new_factory);
-  }
-
-  ~ReplaceDeathTestFactory() {
-    unit_test_impl_->death_test_factory_.release();
-    unit_test_impl_->death_test_factory_.reset(old_factory_);
-  }
- private:
-  // Prevents copying ReplaceDeathTestFactory objects.
-  ReplaceDeathTestFactory(const ReplaceDeathTestFactory&);
-  void operator=(const ReplaceDeathTestFactory&);
-
-  UnitTestImpl* unit_test_impl_;
-  DeathTestFactory* old_factory_;
-};
-
-}  // namespace internal
-}  // namespace testing
-
-namespace {
-
-void DieWithMessage(const ::std::string& message) {
-  fprintf(stderr, "%s", message.c_str());
-  fflush(stderr);  // Make sure the text is printed before the process exits.
-
-  // We call _exit() instead of exit(), as the former is a direct
-  // system call and thus safer in the presence of threads.  exit()
-  // will invoke user-defined exit-hooks, which may do dangerous
-  // things that conflict with death tests.
-  //
-  // Some compilers can recognize that _exit() never returns and issue the
-  // 'unreachable code' warning for code following this function, unless
-  // fooled by a fake condition.
-  if (AlwaysTrue())
-    _exit(1);
-}
-
-void DieInside(const ::std::string& function) {
-  DieWithMessage("death inside " + function + "().");
-}
-
-// Tests that death tests work.
-
-class TestForDeathTest : public testing::Test {
- protected:
-  TestForDeathTest() : original_dir_(FilePath::GetCurrentDir()) {}
-
-  ~TestForDeathTest() override { posix::ChDir(original_dir_.c_str()); }
-
-  // A static member function that's expected to die.
-  static void StaticMemberFunction() { DieInside("StaticMemberFunction"); }
-
-  // A method of the test fixture that may die.
-  void MemberFunction() {
-    if (should_die_)
-      DieInside("MemberFunction");
-  }
-
-  // True if and only if MemberFunction() should die.
-  bool should_die_;
-  const FilePath original_dir_;
-};
-
-// A class with a member function that may die.
-class MayDie {
- public:
-  explicit MayDie(bool should_die) : should_die_(should_die) {}
-
-  // A member function that may die.
-  void MemberFunction() const {
-    if (should_die_)
-      DieInside("MayDie::MemberFunction");
-  }
-
- private:
-  // True if and only if MemberFunction() should die.
-  bool should_die_;
-};
-
-// A global function that's expected to die.
-void GlobalFunction() { DieInside("GlobalFunction"); }
-
-// A non-void function that's expected to die.
-int NonVoidFunction() {
-  DieInside("NonVoidFunction");
-  return 1;
-}
-
-// A unary function that may die.
-void DieIf(bool should_die) {
-  if (should_die)
-    DieInside("DieIf");
-}
-
-// A binary function that may die.
-bool DieIfLessThan(int x, int y) {
-  if (x < y) {
-    DieInside("DieIfLessThan");
-  }
-  return true;
-}
-
-// Tests that ASSERT_DEATH can be used outside a TEST, TEST_F, or test fixture.
-void DeathTestSubroutine() {
-  EXPECT_DEATH(GlobalFunction(), "death.*GlobalFunction");
-  ASSERT_DEATH(GlobalFunction(), "death.*GlobalFunction");
-}
-
-// Death in dbg, not opt.
-int DieInDebugElse12(int* sideeffect) {
-  if (sideeffect) *sideeffect = 12;
-
-# ifndef NDEBUG
-
-  DieInside("DieInDebugElse12");
-
-# endif  // NDEBUG
-
-  return 12;
-}
-
-# if GTEST_OS_WINDOWS
-
-// Death in dbg due to Windows CRT assertion failure, not opt.
-int DieInCRTDebugElse12(int* sideeffect) {
-  if (sideeffect) *sideeffect = 12;
-
-  // Create an invalid fd by closing a valid one
-  int fdpipe[2];
-  EXPECT_EQ(_pipe(fdpipe, 256, O_BINARY), 0);
-  EXPECT_EQ(_close(fdpipe[0]), 0);
-  EXPECT_EQ(_close(fdpipe[1]), 0);
-
-  // _dup() should crash in debug mode
-  EXPECT_EQ(_dup(fdpipe[0]), -1);
-
-  return 12;
-}
-
-#endif  // GTEST_OS_WINDOWS
-
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-// Tests the ExitedWithCode predicate.
-TEST(ExitStatusPredicateTest, ExitedWithCode) {
-  // On Windows, the process's exit code is the same as its exit status,
-  // so the predicate just compares the its input with its parameter.
-  EXPECT_TRUE(testing::ExitedWithCode(0)(0));
-  EXPECT_TRUE(testing::ExitedWithCode(1)(1));
-  EXPECT_TRUE(testing::ExitedWithCode(42)(42));
-  EXPECT_FALSE(testing::ExitedWithCode(0)(1));
-  EXPECT_FALSE(testing::ExitedWithCode(1)(0));
-}
-
-# else
-
-// Returns the exit status of a process that calls _exit(2) with a
-// given exit code.  This is a helper function for the
-// ExitStatusPredicateTest test suite.
-static int NormalExitStatus(int exit_code) {
-  pid_t child_pid = fork();
-  if (child_pid == 0) {
-    _exit(exit_code);
-  }
-  int status;
-  waitpid(child_pid, &status, 0);
-  return status;
-}
-
-// Returns the exit status of a process that raises a given signal.
-// If the signal does not cause the process to die, then it returns
-// instead the exit status of a process that exits normally with exit
-// code 1.  This is a helper function for the ExitStatusPredicateTest
-// test suite.
-static int KilledExitStatus(int signum) {
-  pid_t child_pid = fork();
-  if (child_pid == 0) {
-    raise(signum);
-    _exit(1);
-  }
-  int status;
-  waitpid(child_pid, &status, 0);
-  return status;
-}
-
-// Tests the ExitedWithCode predicate.
-TEST(ExitStatusPredicateTest, ExitedWithCode) {
-  const int status0  = NormalExitStatus(0);
-  const int status1  = NormalExitStatus(1);
-  const int status42 = NormalExitStatus(42);
-  const testing::ExitedWithCode pred0(0);
-  const testing::ExitedWithCode pred1(1);
-  const testing::ExitedWithCode pred42(42);
-  EXPECT_PRED1(pred0,  status0);
-  EXPECT_PRED1(pred1,  status1);
-  EXPECT_PRED1(pred42, status42);
-  EXPECT_FALSE(pred0(status1));
-  EXPECT_FALSE(pred42(status0));
-  EXPECT_FALSE(pred1(status42));
-}
-
-// Tests the KilledBySignal predicate.
-TEST(ExitStatusPredicateTest, KilledBySignal) {
-  const int status_segv = KilledExitStatus(SIGSEGV);
-  const int status_kill = KilledExitStatus(SIGKILL);
-  const testing::KilledBySignal pred_segv(SIGSEGV);
-  const testing::KilledBySignal pred_kill(SIGKILL);
-  EXPECT_PRED1(pred_segv, status_segv);
-  EXPECT_PRED1(pred_kill, status_kill);
-  EXPECT_FALSE(pred_segv(status_kill));
-  EXPECT_FALSE(pred_kill(status_segv));
-}
-
-# endif  // GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-// Tests that the death test macros expand to code which may or may not
-// be followed by operator<<, and that in either case the complete text
-// comprises only a single C++ statement.
-TEST_F(TestForDeathTest, SingleStatement) {
-  if (AlwaysFalse())
-    // This would fail if executed; this is a compilation test only
-    ASSERT_DEATH(return, "");
-
-  if (AlwaysTrue())
-    EXPECT_DEATH(_exit(1), "");
-  else
-    // This empty "else" branch is meant to ensure that EXPECT_DEATH
-    // doesn't expand into an "if" statement without an "else"
-    ;
-
-  if (AlwaysFalse())
-    ASSERT_DEATH(return, "") << "did not die";
-
-  if (AlwaysFalse())
-    ;
-  else
-    EXPECT_DEATH(_exit(1), "") << 1 << 2 << 3;
-}
-
-# if GTEST_USES_PCRE
-
-void DieWithEmbeddedNul() {
-  fprintf(stderr, "Hello%cmy null world.\n", '\0');
-  fflush(stderr);
-  _exit(1);
-}
-
-// Tests that EXPECT_DEATH and ASSERT_DEATH work when the error
-// message has a NUL character in it.
-TEST_F(TestForDeathTest, EmbeddedNulInMessage) {
-  EXPECT_DEATH(DieWithEmbeddedNul(), "my null world");
-  ASSERT_DEATH(DieWithEmbeddedNul(), "my null world");
-}
-
-# endif  // GTEST_USES_PCRE
-
-// Tests that death test macros expand to code which interacts well with switch
-// statements.
-TEST_F(TestForDeathTest, SwitchStatement) {
-  // Microsoft compiler usually complains about switch statements without
-  // case labels. We suppress that warning for this test.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4065)
-
-  switch (0)
-    default:
-      ASSERT_DEATH(_exit(1), "") << "exit in default switch handler";
-
-  switch (0)
-    case 0:
-      EXPECT_DEATH(_exit(1), "") << "exit in switch case";
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-}
-
-// Tests that a static member function can be used in a "fast" style
-// death test.
-TEST_F(TestForDeathTest, StaticMemberFunctionFastStyle) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  ASSERT_DEATH(StaticMemberFunction(), "death.*StaticMember");
-}
-
-// Tests that a method of the test fixture can be used in a "fast"
-// style death test.
-TEST_F(TestForDeathTest, MemberFunctionFastStyle) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  should_die_ = true;
-  EXPECT_DEATH(MemberFunction(), "inside.*MemberFunction");
-}
-
-void ChangeToRootDir() { posix::ChDir(GTEST_PATH_SEP_); }
-
-// Tests that death tests work even if the current directory has been
-// changed.
-TEST_F(TestForDeathTest, FastDeathTestInChangedDir) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-
-  ChangeToRootDir();
-  EXPECT_EXIT(_exit(1), testing::ExitedWithCode(1), "");
-
-  ChangeToRootDir();
-  ASSERT_DEATH(_exit(1), "");
-}
-
-# if GTEST_OS_LINUX
-void SigprofAction(int, siginfo_t*, void*) { /* no op */ }
-
-// Sets SIGPROF action and ITIMER_PROF timer (interval: 1ms).
-void SetSigprofActionAndTimer() {
-  struct itimerval timer;
-  timer.it_interval.tv_sec = 0;
-  timer.it_interval.tv_usec = 1;
-  timer.it_value = timer.it_interval;
-  ASSERT_EQ(0, setitimer(ITIMER_PROF, &timer, nullptr));
-  struct sigaction signal_action;
-  memset(&signal_action, 0, sizeof(signal_action));
-  sigemptyset(&signal_action.sa_mask);
-  signal_action.sa_sigaction = SigprofAction;
-  signal_action.sa_flags = SA_RESTART | SA_SIGINFO;
-  ASSERT_EQ(0, sigaction(SIGPROF, &signal_action, nullptr));
-}
-
-// Disables ITIMER_PROF timer and ignores SIGPROF signal.
-void DisableSigprofActionAndTimer(struct sigaction* old_signal_action) {
-  struct itimerval timer;
-  timer.it_interval.tv_sec = 0;
-  timer.it_interval.tv_usec = 0;
-  timer.it_value = timer.it_interval;
-  ASSERT_EQ(0, setitimer(ITIMER_PROF, &timer, nullptr));
-  struct sigaction signal_action;
-  memset(&signal_action, 0, sizeof(signal_action));
-  sigemptyset(&signal_action.sa_mask);
-  signal_action.sa_handler = SIG_IGN;
-  ASSERT_EQ(0, sigaction(SIGPROF, &signal_action, old_signal_action));
-}
-
-// Tests that death tests work when SIGPROF handler and timer are set.
-TEST_F(TestForDeathTest, FastSigprofActionSet) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  SetSigprofActionAndTimer();
-  EXPECT_DEATH(_exit(1), "");
-  struct sigaction old_signal_action;
-  DisableSigprofActionAndTimer(&old_signal_action);
-  EXPECT_TRUE(old_signal_action.sa_sigaction == SigprofAction);
-}
-
-TEST_F(TestForDeathTest, ThreadSafeSigprofActionSet) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  SetSigprofActionAndTimer();
-  EXPECT_DEATH(_exit(1), "");
-  struct sigaction old_signal_action;
-  DisableSigprofActionAndTimer(&old_signal_action);
-  EXPECT_TRUE(old_signal_action.sa_sigaction == SigprofAction);
-}
-# endif  // GTEST_OS_LINUX
-
-// Repeats a representative sample of death tests in the "threadsafe" style:
-
-TEST_F(TestForDeathTest, StaticMemberFunctionThreadsafeStyle) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  ASSERT_DEATH(StaticMemberFunction(), "death.*StaticMember");
-}
-
-TEST_F(TestForDeathTest, MemberFunctionThreadsafeStyle) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  should_die_ = true;
-  EXPECT_DEATH(MemberFunction(), "inside.*MemberFunction");
-}
-
-TEST_F(TestForDeathTest, ThreadsafeDeathTestInLoop) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-
-  for (int i = 0; i < 3; ++i)
-    EXPECT_EXIT(_exit(i), testing::ExitedWithCode(i), "") << ": i = " << i;
-}
-
-TEST_F(TestForDeathTest, ThreadsafeDeathTestInChangedDir) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-
-  ChangeToRootDir();
-  EXPECT_EXIT(_exit(1), testing::ExitedWithCode(1), "");
-
-  ChangeToRootDir();
-  ASSERT_DEATH(_exit(1), "");
-}
-
-TEST_F(TestForDeathTest, MixedStyles) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  EXPECT_DEATH(_exit(1), "");
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_DEATH(_exit(1), "");
-}
-
-# if GTEST_HAS_CLONE && GTEST_HAS_PTHREAD
-
-bool pthread_flag;
-
-void SetPthreadFlag() {
-  pthread_flag = true;
-}
-
-TEST_F(TestForDeathTest, DoesNotExecuteAtforkHooks) {
-  if (!testing::GTEST_FLAG(death_test_use_fork)) {
-    testing::GTEST_FLAG(death_test_style) = "threadsafe";
-    pthread_flag = false;
-    ASSERT_EQ(0, pthread_atfork(&SetPthreadFlag, nullptr, nullptr));
-    ASSERT_DEATH(_exit(1), "");
-    ASSERT_FALSE(pthread_flag);
-  }
-}
-
-# endif  // GTEST_HAS_CLONE && GTEST_HAS_PTHREAD
-
-// Tests that a method of another class can be used in a death test.
-TEST_F(TestForDeathTest, MethodOfAnotherClass) {
-  const MayDie x(true);
-  ASSERT_DEATH(x.MemberFunction(), "MayDie\\:\\:MemberFunction");
-}
-
-// Tests that a global function can be used in a death test.
-TEST_F(TestForDeathTest, GlobalFunction) {
-  EXPECT_DEATH(GlobalFunction(), "GlobalFunction");
-}
-
-// Tests that any value convertible to an RE works as a second
-// argument to EXPECT_DEATH.
-TEST_F(TestForDeathTest, AcceptsAnythingConvertibleToRE) {
-  static const char regex_c_str[] = "GlobalFunction";
-  EXPECT_DEATH(GlobalFunction(), regex_c_str);
-
-  const testing::internal::RE regex(regex_c_str);
-  EXPECT_DEATH(GlobalFunction(), regex);
-
-# if !GTEST_USES_PCRE
-
-  const ::std::string regex_std_str(regex_c_str);
-  EXPECT_DEATH(GlobalFunction(), regex_std_str);
-
-  // This one is tricky; a temporary pointer into another temporary.  Reference
-  // lifetime extension of the pointer is not sufficient.
-  EXPECT_DEATH(GlobalFunction(), ::std::string(regex_c_str).c_str());
-
-# endif  // !GTEST_USES_PCRE
-}
-
-// Tests that a non-void function can be used in a death test.
-TEST_F(TestForDeathTest, NonVoidFunction) {
-  ASSERT_DEATH(NonVoidFunction(), "NonVoidFunction");
-}
-
-// Tests that functions that take parameter(s) can be used in a death test.
-TEST_F(TestForDeathTest, FunctionWithParameter) {
-  EXPECT_DEATH(DieIf(true), "DieIf\\(\\)");
-  EXPECT_DEATH(DieIfLessThan(2, 3), "DieIfLessThan");
-}
-
-// Tests that ASSERT_DEATH can be used outside a TEST, TEST_F, or test fixture.
-TEST_F(TestForDeathTest, OutsideFixture) {
-  DeathTestSubroutine();
-}
-
-// Tests that death tests can be done inside a loop.
-TEST_F(TestForDeathTest, InsideLoop) {
-  for (int i = 0; i < 5; i++) {
-    EXPECT_DEATH(DieIfLessThan(-1, i), "DieIfLessThan") << "where i == " << i;
-  }
-}
-
-// Tests that a compound statement can be used in a death test.
-TEST_F(TestForDeathTest, CompoundStatement) {
-  EXPECT_DEATH({  // NOLINT
-    const int x = 2;
-    const int y = x + 1;
-    DieIfLessThan(x, y);
-  },
-  "DieIfLessThan");
-}
-
-// Tests that code that doesn't die causes a death test to fail.
-TEST_F(TestForDeathTest, DoesNotDie) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(DieIf(false), "DieIf"),
-                          "failed to die");
-}
-
-// Tests that a death test fails when the error message isn't expected.
-TEST_F(TestForDeathTest, ErrorMessageMismatch) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_DEATH(DieIf(true), "DieIfLessThan") << "End of death test message.";
-  }, "died but not with expected error");
-}
-
-// On exit, *aborted will be true if and only if the EXPECT_DEATH()
-// statement aborted the function.
-void ExpectDeathTestHelper(bool* aborted) {
-  *aborted = true;
-  EXPECT_DEATH(DieIf(false), "DieIf");  // This assertion should fail.
-  *aborted = false;
-}
-
-// Tests that EXPECT_DEATH doesn't abort the test on failure.
-TEST_F(TestForDeathTest, EXPECT_DEATH) {
-  bool aborted = true;
-  EXPECT_NONFATAL_FAILURE(ExpectDeathTestHelper(&aborted),
-                          "failed to die");
-  EXPECT_FALSE(aborted);
-}
-
-// Tests that ASSERT_DEATH does abort the test on failure.
-TEST_F(TestForDeathTest, ASSERT_DEATH) {
-  static bool aborted;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    aborted = true;
-    ASSERT_DEATH(DieIf(false), "DieIf");  // This assertion should fail.
-    aborted = false;
-  }, "failed to die");
-  EXPECT_TRUE(aborted);
-}
-
-// Tests that EXPECT_DEATH evaluates the arguments exactly once.
-TEST_F(TestForDeathTest, SingleEvaluation) {
-  int x = 3;
-  EXPECT_DEATH(DieIf((++x) == 4), "DieIf");
-
-  const char* regex = "DieIf";
-  const char* regex_save = regex;
-  EXPECT_DEATH(DieIfLessThan(3, 4), regex++);
-  EXPECT_EQ(regex_save + 1, regex);
-}
-
-// Tests that run-away death tests are reported as failures.
-TEST_F(TestForDeathTest, RunawayIsFailure) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(static_cast<void>(0), "Foo"),
-                          "failed to die.");
-}
-
-// Tests that death tests report executing 'return' in the statement as
-// failure.
-TEST_F(TestForDeathTest, ReturnIsFailure) {
-  EXPECT_FATAL_FAILURE(ASSERT_DEATH(return, "Bar"),
-                       "illegal return in test statement.");
-}
-
-// Tests that EXPECT_DEBUG_DEATH works as expected, that is, you can stream a
-// message to it, and in debug mode it:
-// 1. Asserts on death.
-// 2. Has no side effect.
-//
-// And in opt mode, it:
-// 1.  Has side effects but does not assert.
-TEST_F(TestForDeathTest, TestExpectDebugDeath) {
-  int sideeffect = 0;
-
-  // Put the regex in a local variable to make sure we don't get an "unused"
-  // warning in opt mode.
-  const char* regex = "death.*DieInDebugElse12";
-
-  EXPECT_DEBUG_DEATH(DieInDebugElse12(&sideeffect), regex)
-      << "Must accept a streamed message";
-
-# ifdef NDEBUG
-
-  // Checks that the assignment occurs in opt mode (sideeffect).
-  EXPECT_EQ(12, sideeffect);
-
-# else
-
-  // Checks that the assignment does not occur in dbg mode (no sideeffect).
-  EXPECT_EQ(0, sideeffect);
-
-# endif
-}
-
-# if GTEST_OS_WINDOWS
-
-// Tests that EXPECT_DEBUG_DEATH works as expected when in debug mode
-// the Windows CRT crashes the process with an assertion failure.
-// 1. Asserts on death.
-// 2. Has no side effect (doesn't pop up a window or wait for user input).
-//
-// And in opt mode, it:
-// 1.  Has side effects but does not assert.
-TEST_F(TestForDeathTest, CRTDebugDeath) {
-  int sideeffect = 0;
-
-  // Put the regex in a local variable to make sure we don't get an "unused"
-  // warning in opt mode.
-  const char* regex = "dup.* : Assertion failed";
-
-  EXPECT_DEBUG_DEATH(DieInCRTDebugElse12(&sideeffect), regex)
-      << "Must accept a streamed message";
-
-# ifdef NDEBUG
-
-  // Checks that the assignment occurs in opt mode (sideeffect).
-  EXPECT_EQ(12, sideeffect);
-
-# else
-
-  // Checks that the assignment does not occur in dbg mode (no sideeffect).
-  EXPECT_EQ(0, sideeffect);
-
-# endif
-}
-
-# endif  // GTEST_OS_WINDOWS
-
-// Tests that ASSERT_DEBUG_DEATH works as expected, that is, you can stream a
-// message to it, and in debug mode it:
-// 1. Asserts on death.
-// 2. Has no side effect.
-//
-// And in opt mode, it:
-// 1.  Has side effects but does not assert.
-TEST_F(TestForDeathTest, TestAssertDebugDeath) {
-  int sideeffect = 0;
-
-  ASSERT_DEBUG_DEATH(DieInDebugElse12(&sideeffect), "death.*DieInDebugElse12")
-      << "Must accept a streamed message";
-
-# ifdef NDEBUG
-
-  // Checks that the assignment occurs in opt mode (sideeffect).
-  EXPECT_EQ(12, sideeffect);
-
-# else
-
-  // Checks that the assignment does not occur in dbg mode (no sideeffect).
-  EXPECT_EQ(0, sideeffect);
-
-# endif
-}
-
-# ifndef NDEBUG
-
-void ExpectDebugDeathHelper(bool* aborted) {
-  *aborted = true;
-  EXPECT_DEBUG_DEATH(return, "") << "This is expected to fail.";
-  *aborted = false;
-}
-
-#  if GTEST_OS_WINDOWS
-TEST(PopUpDeathTest, DoesNotShowPopUpOnAbort) {
-  printf("This test should be considered failing if it shows "
-         "any pop-up dialogs.\n");
-  fflush(stdout);
-
-  EXPECT_DEATH({
-    testing::GTEST_FLAG(catch_exceptions) = false;
-    abort();
-  }, "");
-}
-#  endif  // GTEST_OS_WINDOWS
-
-// Tests that EXPECT_DEBUG_DEATH in debug mode does not abort
-// the function.
-TEST_F(TestForDeathTest, ExpectDebugDeathDoesNotAbort) {
-  bool aborted = true;
-  EXPECT_NONFATAL_FAILURE(ExpectDebugDeathHelper(&aborted), "");
-  EXPECT_FALSE(aborted);
-}
-
-void AssertDebugDeathHelper(bool* aborted) {
-  *aborted = true;
-  GTEST_LOG_(INFO) << "Before ASSERT_DEBUG_DEATH";
-  ASSERT_DEBUG_DEATH(GTEST_LOG_(INFO) << "In ASSERT_DEBUG_DEATH"; return, "")
-      << "This is expected to fail.";
-  GTEST_LOG_(INFO) << "After ASSERT_DEBUG_DEATH";
-  *aborted = false;
-}
-
-// Tests that ASSERT_DEBUG_DEATH in debug mode aborts the function on
-// failure.
-TEST_F(TestForDeathTest, AssertDebugDeathAborts) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts2) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts3) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts4) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts5) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts6) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts7) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts8) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts9) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts10) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-# endif  // _NDEBUG
-
-// Tests the *_EXIT family of macros, using a variety of predicates.
-static void TestExitMacros() {
-  EXPECT_EXIT(_exit(1),  testing::ExitedWithCode(1),  "");
-  ASSERT_EXIT(_exit(42), testing::ExitedWithCode(42), "");
-
-# if GTEST_OS_WINDOWS
-
-  // Of all signals effects on the process exit code, only those of SIGABRT
-  // are documented on Windows.
-  // See https://msdn.microsoft.com/en-us/query-bi/m/dwwzkt4c.
-  EXPECT_EXIT(raise(SIGABRT), testing::ExitedWithCode(3), "") << "b_ar";
-
-# elif !GTEST_OS_FUCHSIA
-
-  // Fuchsia has no unix signals.
-  EXPECT_EXIT(raise(SIGKILL), testing::KilledBySignal(SIGKILL), "") << "foo";
-  ASSERT_EXIT(raise(SIGUSR2), testing::KilledBySignal(SIGUSR2), "") << "bar";
-
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_EXIT(_exit(0), testing::KilledBySignal(SIGSEGV), "")
-      << "This failure is expected, too.";
-  }, "This failure is expected, too.");
-
-# endif  // GTEST_OS_WINDOWS
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_EXIT(raise(SIGSEGV), testing::ExitedWithCode(0), "")
-      << "This failure is expected.";
-  }, "This failure is expected.");
-}
-
-TEST_F(TestForDeathTest, ExitMacros) {
-  TestExitMacros();
-}
-
-TEST_F(TestForDeathTest, ExitMacrosUsingFork) {
-  testing::GTEST_FLAG(death_test_use_fork) = true;
-  TestExitMacros();
-}
-
-TEST_F(TestForDeathTest, InvalidStyle) {
-  testing::GTEST_FLAG(death_test_style) = "rococo";
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_DEATH(_exit(0), "") << "This failure is expected.";
-  }, "This failure is expected.");
-}
-
-TEST_F(TestForDeathTest, DeathTestFailedOutput) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH(DieWithMessage("death\n"),
-                   "expected message"),
-      "Actual msg:\n"
-      "[  DEATH   ] death\n");
-}
-
-TEST_F(TestForDeathTest, DeathTestUnexpectedReturnOutput) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH({
-          fprintf(stderr, "returning\n");
-          fflush(stderr);
-          return;
-        }, ""),
-      "    Result: illegal return in test statement.\n"
-      " Error msg:\n"
-      "[  DEATH   ] returning\n");
-}
-
-TEST_F(TestForDeathTest, DeathTestBadExitCodeOutput) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_EXIT(DieWithMessage("exiting with rc 1\n"),
-                  testing::ExitedWithCode(3),
-                  "expected message"),
-      "    Result: died but not with expected exit code:\n"
-      "            Exited with exit status 1\n"
-      "Actual msg:\n"
-      "[  DEATH   ] exiting with rc 1\n");
-}
-
-TEST_F(TestForDeathTest, DeathTestMultiLineMatchFail) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH(DieWithMessage("line 1\nline 2\nline 3\n"),
-                   "line 1\nxyz\nline 3\n"),
-      "Actual msg:\n"
-      "[  DEATH   ] line 1\n"
-      "[  DEATH   ] line 2\n"
-      "[  DEATH   ] line 3\n");
-}
-
-TEST_F(TestForDeathTest, DeathTestMultiLineMatchPass) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_DEATH(DieWithMessage("line 1\nline 2\nline 3\n"),
-               "line 1\nline 2\nline 3\n");
-}
-
-// A DeathTestFactory that returns MockDeathTests.
-class MockDeathTestFactory : public DeathTestFactory {
- public:
-  MockDeathTestFactory();
-  bool Create(const char* statement,
-              testing::Matcher<const std::string&> matcher, const char* file,
-              int line, DeathTest** test) override;
-
-  // Sets the parameters for subsequent calls to Create.
-  void SetParameters(bool create, DeathTest::TestRole role,
-                     int status, bool passed);
-
-  // Accessors.
-  int AssumeRoleCalls() const { return assume_role_calls_; }
-  int WaitCalls() const { return wait_calls_; }
-  size_t PassedCalls() const { return passed_args_.size(); }
-  bool PassedArgument(int n) const {
-    return passed_args_[static_cast<size_t>(n)];
-  }
-  size_t AbortCalls() const { return abort_args_.size(); }
-  DeathTest::AbortReason AbortArgument(int n) const {
-    return abort_args_[static_cast<size_t>(n)];
-  }
-  bool TestDeleted() const { return test_deleted_; }
-
- private:
-  friend class MockDeathTest;
-  // If true, Create will return a MockDeathTest; otherwise it returns
-  // NULL.
-  bool create_;
-  // The value a MockDeathTest will return from its AssumeRole method.
-  DeathTest::TestRole role_;
-  // The value a MockDeathTest will return from its Wait method.
-  int status_;
-  // The value a MockDeathTest will return from its Passed method.
-  bool passed_;
-
-  // Number of times AssumeRole was called.
-  int assume_role_calls_;
-  // Number of times Wait was called.
-  int wait_calls_;
-  // The arguments to the calls to Passed since the last call to
-  // SetParameters.
-  std::vector<bool> passed_args_;
-  // The arguments to the calls to Abort since the last call to
-  // SetParameters.
-  std::vector<DeathTest::AbortReason> abort_args_;
-  // True if the last MockDeathTest returned by Create has been
-  // deleted.
-  bool test_deleted_;
-};
-
-
-// A DeathTest implementation useful in testing.  It returns values set
-// at its creation from its various inherited DeathTest methods, and
-// reports calls to those methods to its parent MockDeathTestFactory
-// object.
-class MockDeathTest : public DeathTest {
- public:
-  MockDeathTest(MockDeathTestFactory *parent,
-                TestRole role, int status, bool passed) :
-      parent_(parent), role_(role), status_(status), passed_(passed) {
-  }
-  ~MockDeathTest() override { parent_->test_deleted_ = true; }
-  TestRole AssumeRole() override {
-    ++parent_->assume_role_calls_;
-    return role_;
-  }
-  int Wait() override {
-    ++parent_->wait_calls_;
-    return status_;
-  }
-  bool Passed(bool exit_status_ok) override {
-    parent_->passed_args_.push_back(exit_status_ok);
-    return passed_;
-  }
-  void Abort(AbortReason reason) override {
-    parent_->abort_args_.push_back(reason);
-  }
-
- private:
-  MockDeathTestFactory* const parent_;
-  const TestRole role_;
-  const int status_;
-  const bool passed_;
-};
-
-
-// MockDeathTestFactory constructor.
-MockDeathTestFactory::MockDeathTestFactory()
-    : create_(true),
-      role_(DeathTest::OVERSEE_TEST),
-      status_(0),
-      passed_(true),
-      assume_role_calls_(0),
-      wait_calls_(0),
-      passed_args_(),
-      abort_args_() {
-}
-
-
-// Sets the parameters for subsequent calls to Create.
-void MockDeathTestFactory::SetParameters(bool create,
-                                         DeathTest::TestRole role,
-                                         int status, bool passed) {
-  create_ = create;
-  role_ = role;
-  status_ = status;
-  passed_ = passed;
-
-  assume_role_calls_ = 0;
-  wait_calls_ = 0;
-  passed_args_.clear();
-  abort_args_.clear();
-}
-
-
-// Sets test to NULL (if create_ is false) or to the address of a new
-// MockDeathTest object with parameters taken from the last call
-// to SetParameters (if create_ is true).  Always returns true.
-bool MockDeathTestFactory::Create(
-    const char* /*statement*/, testing::Matcher<const std::string&> /*matcher*/,
-    const char* /*file*/, int /*line*/, DeathTest** test) {
-  test_deleted_ = false;
-  if (create_) {
-    *test = new MockDeathTest(this, role_, status_, passed_);
-  } else {
-    *test = nullptr;
-  }
-  return true;
-}
-
-// A test fixture for testing the logic of the GTEST_DEATH_TEST_ macro.
-// It installs a MockDeathTestFactory that is used for the duration
-// of the test case.
-class MacroLogicDeathTest : public testing::Test {
- protected:
-  static testing::internal::ReplaceDeathTestFactory* replacer_;
-  static MockDeathTestFactory* factory_;
-
-  static void SetUpTestSuite() {
-    factory_ = new MockDeathTestFactory;
-    replacer_ = new testing::internal::ReplaceDeathTestFactory(factory_);
-  }
-
-  static void TearDownTestSuite() {
-    delete replacer_;
-    replacer_ = nullptr;
-    delete factory_;
-    factory_ = nullptr;
-  }
-
-  // Runs a death test that breaks the rules by returning.  Such a death
-  // test cannot be run directly from a test routine that uses a
-  // MockDeathTest, or the remainder of the routine will not be executed.
-  static void RunReturningDeathTest(bool* flag) {
-    ASSERT_DEATH({  // NOLINT
-      *flag = true;
-      return;
-    }, "");
-  }
-};
-
-testing::internal::ReplaceDeathTestFactory* MacroLogicDeathTest::replacer_ =
-    nullptr;
-MockDeathTestFactory* MacroLogicDeathTest::factory_ = nullptr;
-
-// Test that nothing happens when the factory doesn't return a DeathTest:
-TEST_F(MacroLogicDeathTest, NothingHappens) {
-  bool flag = false;
-  factory_->SetParameters(false, DeathTest::OVERSEE_TEST, 0, true);
-  EXPECT_DEATH(flag = true, "");
-  EXPECT_FALSE(flag);
-  EXPECT_EQ(0, factory_->AssumeRoleCalls());
-  EXPECT_EQ(0, factory_->WaitCalls());
-  EXPECT_EQ(0U, factory_->PassedCalls());
-  EXPECT_EQ(0U, factory_->AbortCalls());
-  EXPECT_FALSE(factory_->TestDeleted());
-}
-
-// Test that the parent process doesn't run the death test code,
-// and that the Passed method returns false when the (simulated)
-// child process exits with status 0:
-TEST_F(MacroLogicDeathTest, ChildExitsSuccessfully) {
-  bool flag = false;
-  factory_->SetParameters(true, DeathTest::OVERSEE_TEST, 0, true);
-  EXPECT_DEATH(flag = true, "");
-  EXPECT_FALSE(flag);
-  EXPECT_EQ(1, factory_->AssumeRoleCalls());
-  EXPECT_EQ(1, factory_->WaitCalls());
-  ASSERT_EQ(1U, factory_->PassedCalls());
-  EXPECT_FALSE(factory_->PassedArgument(0));
-  EXPECT_EQ(0U, factory_->AbortCalls());
-  EXPECT_TRUE(factory_->TestDeleted());
-}
-
-// Tests that the Passed method was given the argument "true" when
-// the (simulated) child process exits with status 1:
-TEST_F(MacroLogicDeathTest, ChildExitsUnsuccessfully) {
-  bool flag = false;
-  factory_->SetParameters(true, DeathTest::OVERSEE_TEST, 1, true);
-  EXPECT_DEATH(flag = true, "");
-  EXPECT_FALSE(flag);
-  EXPECT_EQ(1, factory_->AssumeRoleCalls());
-  EXPECT_EQ(1, factory_->WaitCalls());
-  ASSERT_EQ(1U, factory_->PassedCalls());
-  EXPECT_TRUE(factory_->PassedArgument(0));
-  EXPECT_EQ(0U, factory_->AbortCalls());
-  EXPECT_TRUE(factory_->TestDeleted());
-}
-
-// Tests that the (simulated) child process executes the death test
-// code, and is aborted with the correct AbortReason if it
-// executes a return statement.
-TEST_F(MacroLogicDeathTest, ChildPerformsReturn) {
-  bool flag = false;
-  factory_->SetParameters(true, DeathTest::EXECUTE_TEST, 0, true);
-  RunReturningDeathTest(&flag);
-  EXPECT_TRUE(flag);
-  EXPECT_EQ(1, factory_->AssumeRoleCalls());
-  EXPECT_EQ(0, factory_->WaitCalls());
-  EXPECT_EQ(0U, factory_->PassedCalls());
-  EXPECT_EQ(1U, factory_->AbortCalls());
-  EXPECT_EQ(DeathTest::TEST_ENCOUNTERED_RETURN_STATEMENT,
-            factory_->AbortArgument(0));
-  EXPECT_TRUE(factory_->TestDeleted());
-}
-
-// Tests that the (simulated) child process is aborted with the
-// correct AbortReason if it does not die.
-TEST_F(MacroLogicDeathTest, ChildDoesNotDie) {
-  bool flag = false;
-  factory_->SetParameters(true, DeathTest::EXECUTE_TEST, 0, true);
-  EXPECT_DEATH(flag = true, "");
-  EXPECT_TRUE(flag);
-  EXPECT_EQ(1, factory_->AssumeRoleCalls());
-  EXPECT_EQ(0, factory_->WaitCalls());
-  EXPECT_EQ(0U, factory_->PassedCalls());
-  // This time there are two calls to Abort: one since the test didn't
-  // die, and another from the ReturnSentinel when it's destroyed.  The
-  // sentinel normally isn't destroyed if a test doesn't die, since
-  // _exit(2) is called in that case by ForkingDeathTest, but not by
-  // our MockDeathTest.
-  ASSERT_EQ(2U, factory_->AbortCalls());
-  EXPECT_EQ(DeathTest::TEST_DID_NOT_DIE,
-            factory_->AbortArgument(0));
-  EXPECT_EQ(DeathTest::TEST_ENCOUNTERED_RETURN_STATEMENT,
-            factory_->AbortArgument(1));
-  EXPECT_TRUE(factory_->TestDeleted());
-}
-
-// Tests that a successful death test does not register a successful
-// test part.
-TEST(SuccessRegistrationDeathTest, NoSuccessPart) {
-  EXPECT_DEATH(_exit(1), "");
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-TEST(StreamingAssertionsDeathTest, DeathTest) {
-  EXPECT_DEATH(_exit(1), "") << "unexpected failure";
-  ASSERT_DEATH(_exit(1), "") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_DEATH(_exit(0), "") << "expected failure";
-  }, "expected failure");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_DEATH(_exit(0), "") << "expected failure";
-  }, "expected failure");
-}
-
-// Tests that GetLastErrnoDescription returns an empty string when the
-// last error is 0 and non-empty string when it is non-zero.
-TEST(GetLastErrnoDescription, GetLastErrnoDescriptionWorks) {
-  errno = ENOENT;
-  EXPECT_STRNE("", GetLastErrnoDescription().c_str());
-  errno = 0;
-  EXPECT_STREQ("", GetLastErrnoDescription().c_str());
-}
-
-# if GTEST_OS_WINDOWS
-TEST(AutoHandleTest, AutoHandleWorks) {
-  HANDLE handle = ::CreateEvent(NULL, FALSE, FALSE, NULL);
-  ASSERT_NE(INVALID_HANDLE_VALUE, handle);
-
-  // Tests that the AutoHandle is correctly initialized with a handle.
-  testing::internal::AutoHandle auto_handle(handle);
-  EXPECT_EQ(handle, auto_handle.Get());
-
-  // Tests that Reset assigns INVALID_HANDLE_VALUE.
-  // Note that this cannot verify whether the original handle is closed.
-  auto_handle.Reset();
-  EXPECT_EQ(INVALID_HANDLE_VALUE, auto_handle.Get());
-
-  // Tests that Reset assigns the new handle.
-  // Note that this cannot verify whether the original handle is closed.
-  handle = ::CreateEvent(NULL, FALSE, FALSE, NULL);
-  ASSERT_NE(INVALID_HANDLE_VALUE, handle);
-  auto_handle.Reset(handle);
-  EXPECT_EQ(handle, auto_handle.Get());
-
-  // Tests that AutoHandle contains INVALID_HANDLE_VALUE by default.
-  testing::internal::AutoHandle auto_handle2;
-  EXPECT_EQ(INVALID_HANDLE_VALUE, auto_handle2.Get());
-}
-# endif  // GTEST_OS_WINDOWS
-
-# if GTEST_OS_WINDOWS
-typedef unsigned __int64 BiggestParsable;
-typedef signed __int64 BiggestSignedParsable;
-# else
-typedef unsigned long long BiggestParsable;
-typedef signed long long BiggestSignedParsable;
-# endif  // GTEST_OS_WINDOWS
-
-// We cannot use std::numeric_limits<T>::max() as it clashes with the
-// max() macro defined by <windows.h>.
-const BiggestParsable kBiggestParsableMax = ULLONG_MAX;
-const BiggestSignedParsable kBiggestSignedParsableMax = LLONG_MAX;
-
-TEST(ParseNaturalNumberTest, RejectsInvalidFormat) {
-  BiggestParsable result = 0;
-
-  // Rejects non-numbers.
-  EXPECT_FALSE(ParseNaturalNumber("non-number string", &result));
-
-  // Rejects numbers with whitespace prefix.
-  EXPECT_FALSE(ParseNaturalNumber(" 123", &result));
-
-  // Rejects negative numbers.
-  EXPECT_FALSE(ParseNaturalNumber("-123", &result));
-
-  // Rejects numbers starting with a plus sign.
-  EXPECT_FALSE(ParseNaturalNumber("+123", &result));
-  errno = 0;
-}
-
-TEST(ParseNaturalNumberTest, RejectsOverflownNumbers) {
-  BiggestParsable result = 0;
-
-  EXPECT_FALSE(ParseNaturalNumber("99999999999999999999999", &result));
-
-  signed char char_result = 0;
-  EXPECT_FALSE(ParseNaturalNumber("200", &char_result));
-  errno = 0;
-}
-
-TEST(ParseNaturalNumberTest, AcceptsValidNumbers) {
-  BiggestParsable result = 0;
-
-  result = 0;
-  ASSERT_TRUE(ParseNaturalNumber("123", &result));
-  EXPECT_EQ(123U, result);
-
-  // Check 0 as an edge case.
-  result = 1;
-  ASSERT_TRUE(ParseNaturalNumber("0", &result));
-  EXPECT_EQ(0U, result);
-
-  result = 1;
-  ASSERT_TRUE(ParseNaturalNumber("00000", &result));
-  EXPECT_EQ(0U, result);
-}
-
-TEST(ParseNaturalNumberTest, AcceptsTypeLimits) {
-  Message msg;
-  msg << kBiggestParsableMax;
-
-  BiggestParsable result = 0;
-  EXPECT_TRUE(ParseNaturalNumber(msg.GetString(), &result));
-  EXPECT_EQ(kBiggestParsableMax, result);
-
-  Message msg2;
-  msg2 << kBiggestSignedParsableMax;
-
-  BiggestSignedParsable signed_result = 0;
-  EXPECT_TRUE(ParseNaturalNumber(msg2.GetString(), &signed_result));
-  EXPECT_EQ(kBiggestSignedParsableMax, signed_result);
-
-  Message msg3;
-  msg3 << INT_MAX;
-
-  int int_result = 0;
-  EXPECT_TRUE(ParseNaturalNumber(msg3.GetString(), &int_result));
-  EXPECT_EQ(INT_MAX, int_result);
-
-  Message msg4;
-  msg4 << UINT_MAX;
-
-  unsigned int uint_result = 0;
-  EXPECT_TRUE(ParseNaturalNumber(msg4.GetString(), &uint_result));
-  EXPECT_EQ(UINT_MAX, uint_result);
-}
-
-TEST(ParseNaturalNumberTest, WorksForShorterIntegers) {
-  short short_result = 0;
-  ASSERT_TRUE(ParseNaturalNumber("123", &short_result));
-  EXPECT_EQ(123, short_result);
-
-  signed char char_result = 0;
-  ASSERT_TRUE(ParseNaturalNumber("123", &char_result));
-  EXPECT_EQ(123, char_result);
-}
-
-# if GTEST_OS_WINDOWS
-TEST(EnvironmentTest, HandleFitsIntoSizeT) {
-  ASSERT_TRUE(sizeof(HANDLE) <= sizeof(size_t));
-}
-# endif  // GTEST_OS_WINDOWS
-
-// Tests that EXPECT_DEATH_IF_SUPPORTED/ASSERT_DEATH_IF_SUPPORTED trigger
-// failures when death tests are available on the system.
-TEST(ConditionalDeathMacrosDeathTest, ExpectsDeathWhenDeathTestsAvailable) {
-  EXPECT_DEATH_IF_SUPPORTED(DieInside("CondDeathTestExpectMacro"),
-                            "death inside CondDeathTestExpectMacro");
-  ASSERT_DEATH_IF_SUPPORTED(DieInside("CondDeathTestAssertMacro"),
-                            "death inside CondDeathTestAssertMacro");
-
-  // Empty statement will not crash, which must trigger a failure.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH_IF_SUPPORTED(;, ""), "");
-  EXPECT_FATAL_FAILURE(ASSERT_DEATH_IF_SUPPORTED(;, ""), "");
-}
-
-TEST(InDeathTestChildDeathTest, ReportsDeathTestCorrectlyInFastStyle) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_FALSE(InDeathTestChild());
-  EXPECT_DEATH({
-    fprintf(stderr, InDeathTestChild() ? "Inside" : "Outside");
-    fflush(stderr);
-    _exit(1);
-  }, "Inside");
-}
-
-TEST(InDeathTestChildDeathTest, ReportsDeathTestCorrectlyInThreadSafeStyle) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  EXPECT_FALSE(InDeathTestChild());
-  EXPECT_DEATH({
-    fprintf(stderr, InDeathTestChild() ? "Inside" : "Outside");
-    fflush(stderr);
-    _exit(1);
-  }, "Inside");
-}
-
-void DieWithMessage(const char* message) {
-  fputs(message, stderr);
-  fflush(stderr);  // Make sure the text is printed before the process exits.
-  _exit(1);
-}
-
-TEST(MatcherDeathTest, DoesNotBreakBareRegexMatching) {
-  // googletest tests this, of course; here we ensure that including googlemock
-  // has not broken it.
-  EXPECT_DEATH(DieWithMessage("O, I die, Horatio."), "I d[aeiou]e");
-}
-
-TEST(MatcherDeathTest, MonomorphicMatcherMatches) {
-  EXPECT_DEATH(DieWithMessage("Behind O, I am slain!"),
-               Matcher<const std::string&>(ContainsRegex("I am slain")));
-}
-
-TEST(MatcherDeathTest, MonomorphicMatcherDoesNotMatch) {
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH(
-          DieWithMessage("Behind O, I am slain!"),
-          Matcher<const std::string&>(ContainsRegex("Ow, I am slain"))),
-      "Expected: contains regular expression \"Ow, I am slain\"");
-}
-
-TEST(MatcherDeathTest, PolymorphicMatcherMatches) {
-  EXPECT_DEATH(DieWithMessage("The rest is silence."),
-               ContainsRegex("rest is silence"));
-}
-
-TEST(MatcherDeathTest, PolymorphicMatcherDoesNotMatch) {
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH(DieWithMessage("The rest is silence."),
-                   ContainsRegex("rest is science")),
-      "Expected: contains regular expression \"rest is science\"");
-}
-
-}  // namespace
-
-#else  // !GTEST_HAS_DEATH_TEST follows
-
-namespace {
-
-using testing::internal::CaptureStderr;
-using testing::internal::GetCapturedStderr;
-
-// Tests that EXPECT_DEATH_IF_SUPPORTED/ASSERT_DEATH_IF_SUPPORTED are still
-// defined but do not trigger failures when death tests are not available on
-// the system.
-TEST(ConditionalDeathMacrosTest, WarnsWhenDeathTestsNotAvailable) {
-  // Empty statement will not crash, but that should not trigger a failure
-  // when death tests are not supported.
-  CaptureStderr();
-  EXPECT_DEATH_IF_SUPPORTED(;, "");
-  std::string output = GetCapturedStderr();
-  ASSERT_TRUE(NULL != strstr(output.c_str(),
-                             "Death tests are not supported on this platform"));
-  ASSERT_TRUE(NULL != strstr(output.c_str(), ";"));
-
-  // The streamed message should not be printed as there is no test failure.
-  CaptureStderr();
-  EXPECT_DEATH_IF_SUPPORTED(;, "") << "streamed message";
-  output = GetCapturedStderr();
-  ASSERT_TRUE(NULL == strstr(output.c_str(), "streamed message"));
-
-  CaptureStderr();
-  ASSERT_DEATH_IF_SUPPORTED(;, "");  // NOLINT
-  output = GetCapturedStderr();
-  ASSERT_TRUE(NULL != strstr(output.c_str(),
-                             "Death tests are not supported on this platform"));
-  ASSERT_TRUE(NULL != strstr(output.c_str(), ";"));
-
-  CaptureStderr();
-  ASSERT_DEATH_IF_SUPPORTED(;, "") << "streamed message";  // NOLINT
-  output = GetCapturedStderr();
-  ASSERT_TRUE(NULL == strstr(output.c_str(), "streamed message"));
-}
-
-void FuncWithAssert(int* n) {
-  ASSERT_DEATH_IF_SUPPORTED(return;, "");
-  (*n)++;
-}
-
-// Tests that ASSERT_DEATH_IF_SUPPORTED does not return from the current
-// function (as ASSERT_DEATH does) if death tests are not supported.
-TEST(ConditionalDeathMacrosTest, AssertDeatDoesNotReturnhIfUnsupported) {
-  int n = 0;
-  FuncWithAssert(&n);
-  EXPECT_EQ(1, n);
-}
-
-}  // namespace
-
-#endif  // !GTEST_HAS_DEATH_TEST
-
-namespace {
-
-// Tests that the death test macros expand to code which may or may not
-// be followed by operator<<, and that in either case the complete text
-// comprises only a single C++ statement.
-//
-// The syntax should work whether death tests are available or not.
-TEST(ConditionalDeathMacrosSyntaxDeathTest, SingleStatement) {
-  if (AlwaysFalse())
-    // This would fail if executed; this is a compilation test only
-    ASSERT_DEATH_IF_SUPPORTED(return, "");
-
-  if (AlwaysTrue())
-    EXPECT_DEATH_IF_SUPPORTED(_exit(1), "");
-  else
-    // This empty "else" branch is meant to ensure that EXPECT_DEATH
-    // doesn't expand into an "if" statement without an "else"
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ASSERT_DEATH_IF_SUPPORTED(return, "") << "did not die";
-
-  if (AlwaysFalse())
-    ;  // NOLINT
-  else
-    EXPECT_DEATH_IF_SUPPORTED(_exit(1), "") << 1 << 2 << 3;
-}
-
-// Tests that conditional death test macros expand to code which interacts
-// well with switch statements.
-TEST(ConditionalDeathMacrosSyntaxDeathTest, SwitchStatement) {
-  // Microsoft compiler usually complains about switch statements without
-  // case labels. We suppress that warning for this test.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4065)
-
-  switch (0)
-    default:
-      ASSERT_DEATH_IF_SUPPORTED(_exit(1), "")
-          << "exit in default switch handler";
-
-  switch (0)
-    case 0:
-      EXPECT_DEATH_IF_SUPPORTED(_exit(1), "") << "exit in switch case";
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-}
-
-// Tests that a test case whose name ends with "DeathTest" works fine
-// on Windows.
-TEST(NotADeathTest, Test) {
-  SUCCEED();
-}
-
-}  // namespace
diff --git a/3rdparty/gtest/test/googletest-death-test_ex_test.cc b/3rdparty/gtest/test/googletest-death-test_ex_test.cc
deleted file mode 100644
index 7ea5b946..00000000
--- a/3rdparty/gtest/test/googletest-death-test_ex_test.cc
+++ /dev/null
@@ -1,92 +0,0 @@
-// Copyright 2010, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests that verify interaction of exceptions and death tests.
-
-#include "gtest/gtest-death-test.h"
-#include "gtest/gtest.h"
-
-#if GTEST_HAS_DEATH_TEST
-
-# if GTEST_HAS_SEH
-#  include <windows.h>          // For RaiseException().
-# endif
-
-# include "gtest/gtest-spi.h"
-
-# if GTEST_HAS_EXCEPTIONS
-
-#  include <exception>  // For std::exception.
-
-// Tests that death tests report thrown exceptions as failures and that the
-// exceptions do not escape death test macros.
-TEST(CxxExceptionDeathTest, ExceptionIsFailure) {
-  try {
-    EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(throw 1, ""), "threw an exception");
-  } catch (...) {  // NOLINT
-    FAIL() << "An exception escaped a death test macro invocation "
-           << "with catch_exceptions "
-           << (testing::GTEST_FLAG(catch_exceptions) ? "enabled" : "disabled");
-  }
-}
-
-class TestException : public std::exception {
- public:
-  const char* what() const throw() override { return "exceptional message"; }
-};
-
-TEST(CxxExceptionDeathTest, PrintsMessageForStdExceptions) {
-  // Verifies that the exception message is quoted in the failure text.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(throw TestException(), ""),
-                          "exceptional message");
-  // Verifies that the location is mentioned in the failure text.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(throw TestException(), ""),
-                          __FILE__);
-}
-# endif  // GTEST_HAS_EXCEPTIONS
-
-# if GTEST_HAS_SEH
-// Tests that enabling interception of SEH exceptions with the
-// catch_exceptions flag does not interfere with SEH exceptions being
-// treated as death by death tests.
-TEST(SehExceptionDeasTest, CatchExceptionsDoesNotInterfere) {
-  EXPECT_DEATH(RaiseException(42, 0x0, 0, NULL), "")
-      << "with catch_exceptions "
-      << (testing::GTEST_FLAG(catch_exceptions) ? "enabled" : "disabled");
-}
-# endif
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-  testing::GTEST_FLAG(catch_exceptions) = GTEST_ENABLE_CATCH_EXCEPTIONS_ != 0;
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-env-var-test.py b/3rdparty/gtest/test/googletest-env-var-test.py
deleted file mode 100644
index 2f0e406a..00000000
--- a/3rdparty/gtest/test/googletest-env-var-test.py
+++ /dev/null
@@ -1,117 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test correctly parses environment variables."""
-
-import os
-import gtest_test_utils
-
-
-IS_WINDOWS = os.name == 'nt'
-IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
-
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-env-var-test_')
-
-environ = os.environ.copy()
-
-
-def AssertEq(expected, actual):
-  if expected != actual:
-    print('Expected: %s' % (expected,))
-    print('  Actual: %s' % (actual,))
-    raise AssertionError
-
-
-def SetEnvVar(env_var, value):
-  """Sets the env variable to 'value'; unsets it when 'value' is None."""
-
-  if value is not None:
-    environ[env_var] = value
-  elif env_var in environ:
-    del environ[env_var]
-
-
-def GetFlag(flag):
-  """Runs googletest-env-var-test_ and returns its output."""
-
-  args = [COMMAND]
-  if flag is not None:
-    args += [flag]
-  return gtest_test_utils.Subprocess(args, env=environ).output
-
-
-def TestFlag(flag, test_val, default_val):
-  """Verifies that the given flag is affected by the corresponding env var."""
-
-  env_var = 'GTEST_' + flag.upper()
-  SetEnvVar(env_var, test_val)
-  AssertEq(test_val, GetFlag(flag))
-  SetEnvVar(env_var, None)
-  AssertEq(default_val, GetFlag(flag))
-
-
-class GTestEnvVarTest(gtest_test_utils.TestCase):
-
-  def testEnvVarAffectsFlag(self):
-    """Tests that environment variable should affect the corresponding flag."""
-
-    TestFlag('break_on_failure', '1', '0')
-    TestFlag('color', 'yes', 'auto')
-    TestFlag('filter', 'FooTest.Bar', '*')
-    SetEnvVar('XML_OUTPUT_FILE', None)  # For 'output' test
-    TestFlag('output', 'xml:tmp/foo.xml', '')
-    TestFlag('print_time', '0', '1')
-    TestFlag('repeat', '999', '1')
-    TestFlag('throw_on_failure', '1', '0')
-    TestFlag('death_test_style', 'threadsafe', 'fast')
-    TestFlag('catch_exceptions', '0', '1')
-
-    if IS_LINUX:
-      TestFlag('death_test_use_fork', '1', '0')
-      TestFlag('stack_trace_depth', '0', '100')
-
-
-  def testXmlOutputFile(self):
-    """Tests that $XML_OUTPUT_FILE affects the output flag."""
-
-    SetEnvVar('GTEST_OUTPUT', None)
-    SetEnvVar('XML_OUTPUT_FILE', 'tmp/bar.xml')
-    AssertEq('xml:tmp/bar.xml', GetFlag('output'))
-
-  def testXmlOutputFileOverride(self):
-    """Tests that $XML_OUTPUT_FILE is overridden by $GTEST_OUTPUT."""
-
-    SetEnvVar('GTEST_OUTPUT', 'xml:tmp/foo.xml')
-    SetEnvVar('XML_OUTPUT_FILE', 'tmp/bar.xml')
-    AssertEq('xml:tmp/foo.xml', GetFlag('output'))
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-env-var-test_.cc b/3rdparty/gtest/test/googletest-env-var-test_.cc
deleted file mode 100644
index fd2aa82f..00000000
--- a/3rdparty/gtest/test/googletest-env-var-test_.cc
+++ /dev/null
@@ -1,122 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// A helper program for testing that Google Test parses the environment
-// variables correctly.
-
-#include <iostream>
-
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-using ::std::cout;
-
-namespace testing {
-
-// The purpose of this is to make the test more realistic by ensuring
-// that the UnitTest singleton is created before main() is entered.
-// We don't actual run the TEST itself.
-TEST(GTestEnvVarTest, Dummy) {
-}
-
-void PrintFlag(const char* flag) {
-  if (strcmp(flag, "break_on_failure") == 0) {
-    cout << GTEST_FLAG(break_on_failure);
-    return;
-  }
-
-  if (strcmp(flag, "catch_exceptions") == 0) {
-    cout << GTEST_FLAG(catch_exceptions);
-    return;
-  }
-
-  if (strcmp(flag, "color") == 0) {
-    cout << GTEST_FLAG(color);
-    return;
-  }
-
-  if (strcmp(flag, "death_test_style") == 0) {
-    cout << GTEST_FLAG(death_test_style);
-    return;
-  }
-
-  if (strcmp(flag, "death_test_use_fork") == 0) {
-    cout << GTEST_FLAG(death_test_use_fork);
-    return;
-  }
-
-  if (strcmp(flag, "filter") == 0) {
-    cout << GTEST_FLAG(filter);
-    return;
-  }
-
-  if (strcmp(flag, "output") == 0) {
-    cout << GTEST_FLAG(output);
-    return;
-  }
-
-  if (strcmp(flag, "print_time") == 0) {
-    cout << GTEST_FLAG(print_time);
-    return;
-  }
-
-  if (strcmp(flag, "repeat") == 0) {
-    cout << GTEST_FLAG(repeat);
-    return;
-  }
-
-  if (strcmp(flag, "stack_trace_depth") == 0) {
-    cout << GTEST_FLAG(stack_trace_depth);
-    return;
-  }
-
-  if (strcmp(flag, "throw_on_failure") == 0) {
-    cout << GTEST_FLAG(throw_on_failure);
-    return;
-  }
-
-  cout << "Invalid flag name " << flag
-       << ".  Valid names are break_on_failure, color, filter, etc.\n";
-  exit(1);
-}
-
-}  // namespace testing
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  if (argc != 2) {
-    cout << "Usage: googletest-env-var-test_ NAME_OF_FLAG\n";
-    return 1;
-  }
-
-  testing::PrintFlag(argv[1]);
-  return 0;
-}
diff --git a/3rdparty/gtest/test/googletest-filepath-test.cc b/3rdparty/gtest/test/googletest-filepath-test.cc
deleted file mode 100644
index aafad36f..00000000
--- a/3rdparty/gtest/test/googletest-filepath-test.cc
+++ /dev/null
@@ -1,649 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Google Test filepath utilities
-//
-// This file tests classes and functions used internally by
-// Google Test.  They are subject to change without notice.
-//
-// This file is #included from gtest-internal.h.
-// Do not #include this file anywhere else!
-
-#include "gtest/internal/gtest-filepath.h"
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-#if GTEST_OS_WINDOWS_MOBILE
-# include <windows.h>  // NOLINT
-#elif GTEST_OS_WINDOWS
-# include <direct.h>  // NOLINT
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-namespace testing {
-namespace internal {
-namespace {
-
-#if GTEST_OS_WINDOWS_MOBILE
-
-// Windows CE doesn't have the remove C function.
-int remove(const char* path) {
-  LPCWSTR wpath = String::AnsiToUtf16(path);
-  int ret = DeleteFile(wpath) ? 0 : -1;
-  delete [] wpath;
-  return ret;
-}
-// Windows CE doesn't have the _rmdir C function.
-int _rmdir(const char* path) {
-  FilePath filepath(path);
-  LPCWSTR wpath = String::AnsiToUtf16(
-      filepath.RemoveTrailingPathSeparator().c_str());
-  int ret = RemoveDirectory(wpath) ? 0 : -1;
-  delete [] wpath;
-  return ret;
-}
-
-#else
-
-TEST(GetCurrentDirTest, ReturnsCurrentDir) {
-  const FilePath original_dir = FilePath::GetCurrentDir();
-  EXPECT_FALSE(original_dir.IsEmpty());
-
-  posix::ChDir(GTEST_PATH_SEP_);
-  const FilePath cwd = FilePath::GetCurrentDir();
-  posix::ChDir(original_dir.c_str());
-
-# if GTEST_OS_WINDOWS || GTEST_OS_OS2
-
-  // Skips the ":".
-  const char* const cwd_without_drive = strchr(cwd.c_str(), ':');
-  ASSERT_TRUE(cwd_without_drive != NULL);
-  EXPECT_STREQ(GTEST_PATH_SEP_, cwd_without_drive + 1);
-
-# else
-
-  EXPECT_EQ(GTEST_PATH_SEP_, cwd.string());
-
-# endif
-}
-
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-TEST(IsEmptyTest, ReturnsTrueForEmptyPath) {
-  EXPECT_TRUE(FilePath("").IsEmpty());
-}
-
-TEST(IsEmptyTest, ReturnsFalseForNonEmptyPath) {
-  EXPECT_FALSE(FilePath("a").IsEmpty());
-  EXPECT_FALSE(FilePath(".").IsEmpty());
-  EXPECT_FALSE(FilePath("a/b").IsEmpty());
-  EXPECT_FALSE(FilePath("a\\b\\").IsEmpty());
-}
-
-// RemoveDirectoryName "" -> ""
-TEST(RemoveDirectoryNameTest, WhenEmptyName) {
-  EXPECT_EQ("", FilePath("").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "afile" -> "afile"
-TEST(RemoveDirectoryNameTest, ButNoDirectory) {
-  EXPECT_EQ("afile",
-      FilePath("afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "/afile" -> "afile"
-TEST(RemoveDirectoryNameTest, RootFileShouldGiveFileName) {
-  EXPECT_EQ("afile",
-      FilePath(GTEST_PATH_SEP_ "afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "adir/" -> ""
-TEST(RemoveDirectoryNameTest, WhereThereIsNoFileName) {
-  EXPECT_EQ("",
-      FilePath("adir" GTEST_PATH_SEP_).RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "adir/afile" -> "afile"
-TEST(RemoveDirectoryNameTest, ShouldGiveFileName) {
-  EXPECT_EQ("afile",
-      FilePath("adir" GTEST_PATH_SEP_ "afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "adir/subdir/afile" -> "afile"
-TEST(RemoveDirectoryNameTest, ShouldAlsoGiveFileName) {
-  EXPECT_EQ("afile",
-      FilePath("adir" GTEST_PATH_SEP_ "subdir" GTEST_PATH_SEP_ "afile")
-      .RemoveDirectoryName().string());
-}
-
-#if GTEST_HAS_ALT_PATH_SEP_
-
-// Tests that RemoveDirectoryName() works with the alternate separator
-// on Windows.
-
-// RemoveDirectoryName("/afile") -> "afile"
-TEST(RemoveDirectoryNameTest, RootFileShouldGiveFileNameForAlternateSeparator) {
-  EXPECT_EQ("afile", FilePath("/afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName("adir/") -> ""
-TEST(RemoveDirectoryNameTest, WhereThereIsNoFileNameForAlternateSeparator) {
-  EXPECT_EQ("", FilePath("adir/").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName("adir/afile") -> "afile"
-TEST(RemoveDirectoryNameTest, ShouldGiveFileNameForAlternateSeparator) {
-  EXPECT_EQ("afile", FilePath("adir/afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName("adir/subdir/afile") -> "afile"
-TEST(RemoveDirectoryNameTest, ShouldAlsoGiveFileNameForAlternateSeparator) {
-  EXPECT_EQ("afile",
-            FilePath("adir/subdir/afile").RemoveDirectoryName().string());
-}
-
-#endif
-
-// RemoveFileName "" -> "./"
-TEST(RemoveFileNameTest, EmptyName) {
-#if GTEST_OS_WINDOWS_MOBILE
-  // On Windows CE, we use the root as the current directory.
-  EXPECT_EQ(GTEST_PATH_SEP_, FilePath("").RemoveFileName().string());
-#else
-  EXPECT_EQ("." GTEST_PATH_SEP_, FilePath("").RemoveFileName().string());
-#endif
-}
-
-// RemoveFileName "adir/" -> "adir/"
-TEST(RemoveFileNameTest, ButNoFile) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_,
-      FilePath("adir" GTEST_PATH_SEP_).RemoveFileName().string());
-}
-
-// RemoveFileName "adir/afile" -> "adir/"
-TEST(RemoveFileNameTest, GivesDirName) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_,
-            FilePath("adir" GTEST_PATH_SEP_ "afile").RemoveFileName().string());
-}
-
-// RemoveFileName "adir/subdir/afile" -> "adir/subdir/"
-TEST(RemoveFileNameTest, GivesDirAndSubDirName) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_ "subdir" GTEST_PATH_SEP_,
-      FilePath("adir" GTEST_PATH_SEP_ "subdir" GTEST_PATH_SEP_ "afile")
-      .RemoveFileName().string());
-}
-
-// RemoveFileName "/afile" -> "/"
-TEST(RemoveFileNameTest, GivesRootDir) {
-  EXPECT_EQ(GTEST_PATH_SEP_,
-      FilePath(GTEST_PATH_SEP_ "afile").RemoveFileName().string());
-}
-
-#if GTEST_HAS_ALT_PATH_SEP_
-
-// Tests that RemoveFileName() works with the alternate separator on
-// Windows.
-
-// RemoveFileName("adir/") -> "adir/"
-TEST(RemoveFileNameTest, ButNoFileForAlternateSeparator) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_,
-            FilePath("adir/").RemoveFileName().string());
-}
-
-// RemoveFileName("adir/afile") -> "adir/"
-TEST(RemoveFileNameTest, GivesDirNameForAlternateSeparator) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_,
-            FilePath("adir/afile").RemoveFileName().string());
-}
-
-// RemoveFileName("adir/subdir/afile") -> "adir/subdir/"
-TEST(RemoveFileNameTest, GivesDirAndSubDirNameForAlternateSeparator) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_ "subdir" GTEST_PATH_SEP_,
-            FilePath("adir/subdir/afile").RemoveFileName().string());
-}
-
-// RemoveFileName("/afile") -> "\"
-TEST(RemoveFileNameTest, GivesRootDirForAlternateSeparator) {
-  EXPECT_EQ(GTEST_PATH_SEP_, FilePath("/afile").RemoveFileName().string());
-}
-
-#endif
-
-TEST(MakeFileNameTest, GenerateWhenNumberIsZero) {
-  FilePath actual = FilePath::MakeFileName(FilePath("foo"), FilePath("bar"),
-      0, "xml");
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateFileNameNumberGtZero) {
-  FilePath actual = FilePath::MakeFileName(FilePath("foo"), FilePath("bar"),
-      12, "xml");
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar_12.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateFileNameWithSlashNumberIsZero) {
-  FilePath actual = FilePath::MakeFileName(FilePath("foo" GTEST_PATH_SEP_),
-      FilePath("bar"), 0, "xml");
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateFileNameWithSlashNumberGtZero) {
-  FilePath actual = FilePath::MakeFileName(FilePath("foo" GTEST_PATH_SEP_),
-      FilePath("bar"), 12, "xml");
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar_12.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateWhenNumberIsZeroAndDirIsEmpty) {
-  FilePath actual = FilePath::MakeFileName(FilePath(""), FilePath("bar"),
-      0, "xml");
-  EXPECT_EQ("bar.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateWhenNumberIsNotZeroAndDirIsEmpty) {
-  FilePath actual = FilePath::MakeFileName(FilePath(""), FilePath("bar"),
-      14, "xml");
-  EXPECT_EQ("bar_14.xml", actual.string());
-}
-
-TEST(ConcatPathsTest, WorksWhenDirDoesNotEndWithPathSep) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo"),
-                                          FilePath("bar.xml"));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar.xml", actual.string());
-}
-
-TEST(ConcatPathsTest, WorksWhenPath1EndsWithPathSep) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo" GTEST_PATH_SEP_),
-                                          FilePath("bar.xml"));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar.xml", actual.string());
-}
-
-TEST(ConcatPathsTest, Path1BeingEmpty) {
-  FilePath actual = FilePath::ConcatPaths(FilePath(""),
-                                          FilePath("bar.xml"));
-  EXPECT_EQ("bar.xml", actual.string());
-}
-
-TEST(ConcatPathsTest, Path2BeingEmpty) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo"), FilePath(""));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_, actual.string());
-}
-
-TEST(ConcatPathsTest, BothPathBeingEmpty) {
-  FilePath actual = FilePath::ConcatPaths(FilePath(""),
-                                          FilePath(""));
-  EXPECT_EQ("", actual.string());
-}
-
-TEST(ConcatPathsTest, Path1ContainsPathSep) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo" GTEST_PATH_SEP_ "bar"),
-                                          FilePath("foobar.xml"));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar" GTEST_PATH_SEP_ "foobar.xml",
-            actual.string());
-}
-
-TEST(ConcatPathsTest, Path2ContainsPathSep) {
-  FilePath actual = FilePath::ConcatPaths(
-      FilePath("foo" GTEST_PATH_SEP_),
-      FilePath("bar" GTEST_PATH_SEP_ "bar.xml"));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar" GTEST_PATH_SEP_ "bar.xml",
-            actual.string());
-}
-
-TEST(ConcatPathsTest, Path2EndsWithPathSep) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo"),
-                                          FilePath("bar" GTEST_PATH_SEP_));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar" GTEST_PATH_SEP_, actual.string());
-}
-
-// RemoveTrailingPathSeparator "" -> ""
-TEST(RemoveTrailingPathSeparatorTest, EmptyString) {
-  EXPECT_EQ("", FilePath("").RemoveTrailingPathSeparator().string());
-}
-
-// RemoveTrailingPathSeparator "foo" -> "foo"
-TEST(RemoveTrailingPathSeparatorTest, FileNoSlashString) {
-  EXPECT_EQ("foo", FilePath("foo").RemoveTrailingPathSeparator().string());
-}
-
-// RemoveTrailingPathSeparator "foo/" -> "foo"
-TEST(RemoveTrailingPathSeparatorTest, ShouldRemoveTrailingSeparator) {
-  EXPECT_EQ("foo",
-      FilePath("foo" GTEST_PATH_SEP_).RemoveTrailingPathSeparator().string());
-#if GTEST_HAS_ALT_PATH_SEP_
-  EXPECT_EQ("foo", FilePath("foo/").RemoveTrailingPathSeparator().string());
-#endif
-}
-
-// RemoveTrailingPathSeparator "foo/bar/" -> "foo/bar/"
-TEST(RemoveTrailingPathSeparatorTest, ShouldRemoveLastSeparator) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ "bar" GTEST_PATH_SEP_)
-                .RemoveTrailingPathSeparator().string());
-}
-
-// RemoveTrailingPathSeparator "foo/bar" -> "foo/bar"
-TEST(RemoveTrailingPathSeparatorTest, ShouldReturnUnmodified) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ "bar")
-                .RemoveTrailingPathSeparator().string());
-}
-
-TEST(DirectoryTest, RootDirectoryExists) {
-#if GTEST_OS_WINDOWS  // We are on Windows.
-  char current_drive[_MAX_PATH];  // NOLINT
-  current_drive[0] = static_cast<char>(_getdrive() + 'A' - 1);
-  current_drive[1] = ':';
-  current_drive[2] = '\\';
-  current_drive[3] = '\0';
-  EXPECT_TRUE(FilePath(current_drive).DirectoryExists());
-#else
-  EXPECT_TRUE(FilePath("/").DirectoryExists());
-#endif  // GTEST_OS_WINDOWS
-}
-
-#if GTEST_OS_WINDOWS
-TEST(DirectoryTest, RootOfWrongDriveDoesNotExists) {
-  const int saved_drive_ = _getdrive();
-  // Find a drive that doesn't exist. Start with 'Z' to avoid common ones.
-  for (char drive = 'Z'; drive >= 'A'; drive--)
-    if (_chdrive(drive - 'A' + 1) == -1) {
-      char non_drive[_MAX_PATH];  // NOLINT
-      non_drive[0] = drive;
-      non_drive[1] = ':';
-      non_drive[2] = '\\';
-      non_drive[3] = '\0';
-      EXPECT_FALSE(FilePath(non_drive).DirectoryExists());
-      break;
-    }
-  _chdrive(saved_drive_);
-}
-#endif  // GTEST_OS_WINDOWS
-
-#if !GTEST_OS_WINDOWS_MOBILE
-// Windows CE _does_ consider an empty directory to exist.
-TEST(DirectoryTest, EmptyPathDirectoryDoesNotExist) {
-  EXPECT_FALSE(FilePath("").DirectoryExists());
-}
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-TEST(DirectoryTest, CurrentDirectoryExists) {
-#if GTEST_OS_WINDOWS  // We are on Windows.
-# ifndef _WIN32_CE  // Windows CE doesn't have a current directory.
-
-  EXPECT_TRUE(FilePath(".").DirectoryExists());
-  EXPECT_TRUE(FilePath(".\\").DirectoryExists());
-
-# endif  // _WIN32_CE
-#else
-  EXPECT_TRUE(FilePath(".").DirectoryExists());
-  EXPECT_TRUE(FilePath("./").DirectoryExists());
-#endif  // GTEST_OS_WINDOWS
-}
-
-// "foo/bar" == foo//bar" == "foo///bar"
-TEST(NormalizeTest, MultipleConsecutiveSepaparatorsInMidstring) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ "bar").string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ GTEST_PATH_SEP_ "bar").string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ GTEST_PATH_SEP_
-                     GTEST_PATH_SEP_ "bar").string());
-}
-
-// "/bar" == //bar" == "///bar"
-TEST(NormalizeTest, MultipleConsecutiveSepaparatorsAtStringStart) {
-  EXPECT_EQ(GTEST_PATH_SEP_ "bar",
-    FilePath(GTEST_PATH_SEP_ "bar").string());
-  EXPECT_EQ(GTEST_PATH_SEP_ "bar",
-    FilePath(GTEST_PATH_SEP_ GTEST_PATH_SEP_ "bar").string());
-  EXPECT_EQ(GTEST_PATH_SEP_ "bar",
-    FilePath(GTEST_PATH_SEP_ GTEST_PATH_SEP_ GTEST_PATH_SEP_ "bar").string());
-}
-
-// "foo/" == foo//" == "foo///"
-TEST(NormalizeTest, MultipleConsecutiveSepaparatorsAtStringEnd) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-    FilePath("foo" GTEST_PATH_SEP_).string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-    FilePath("foo" GTEST_PATH_SEP_ GTEST_PATH_SEP_).string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-    FilePath("foo" GTEST_PATH_SEP_ GTEST_PATH_SEP_ GTEST_PATH_SEP_).string());
-}
-
-#if GTEST_HAS_ALT_PATH_SEP_
-
-// Tests that separators at the end of the string are normalized
-// regardless of their combination (e.g. "foo\" =="foo/\" ==
-// "foo\\/").
-TEST(NormalizeTest, MixAlternateSeparatorAtStringEnd) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-            FilePath("foo/").string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-            FilePath("foo" GTEST_PATH_SEP_ "/").string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-            FilePath("foo//" GTEST_PATH_SEP_).string());
-}
-
-#endif
-
-TEST(AssignmentOperatorTest, DefaultAssignedToNonDefault) {
-  FilePath default_path;
-  FilePath non_default_path("path");
-  non_default_path = default_path;
-  EXPECT_EQ("", non_default_path.string());
-  EXPECT_EQ("", default_path.string());  // RHS var is unchanged.
-}
-
-TEST(AssignmentOperatorTest, NonDefaultAssignedToDefault) {
-  FilePath non_default_path("path");
-  FilePath default_path;
-  default_path = non_default_path;
-  EXPECT_EQ("path", default_path.string());
-  EXPECT_EQ("path", non_default_path.string());  // RHS var is unchanged.
-}
-
-TEST(AssignmentOperatorTest, ConstAssignedToNonConst) {
-  const FilePath const_default_path("const_path");
-  FilePath non_default_path("path");
-  non_default_path = const_default_path;
-  EXPECT_EQ("const_path", non_default_path.string());
-}
-
-class DirectoryCreationTest : public Test {
- protected:
-  void SetUp() override {
-    testdata_path_.Set(FilePath(
-        TempDir() + GetCurrentExecutableName().string() +
-        "_directory_creation" GTEST_PATH_SEP_ "test" GTEST_PATH_SEP_));
-    testdata_file_.Set(testdata_path_.RemoveTrailingPathSeparator());
-
-    unique_file0_.Set(FilePath::MakeFileName(testdata_path_, FilePath("unique"),
-        0, "txt"));
-    unique_file1_.Set(FilePath::MakeFileName(testdata_path_, FilePath("unique"),
-        1, "txt"));
-
-    remove(testdata_file_.c_str());
-    remove(unique_file0_.c_str());
-    remove(unique_file1_.c_str());
-    posix::RmDir(testdata_path_.c_str());
-  }
-
-  void TearDown() override {
-    remove(testdata_file_.c_str());
-    remove(unique_file0_.c_str());
-    remove(unique_file1_.c_str());
-    posix::RmDir(testdata_path_.c_str());
-  }
-
-  void CreateTextFile(const char* filename) {
-    FILE* f = posix::FOpen(filename, "w");
-    fprintf(f, "text\n");
-    fclose(f);
-  }
-
-  // Strings representing a directory and a file, with identical paths
-  // except for the trailing separator character that distinquishes
-  // a directory named 'test' from a file named 'test'. Example names:
-  FilePath testdata_path_;  // "/tmp/directory_creation/test/"
-  FilePath testdata_file_;  // "/tmp/directory_creation/test"
-  FilePath unique_file0_;  // "/tmp/directory_creation/test/unique.txt"
-  FilePath unique_file1_;  // "/tmp/directory_creation/test/unique_1.txt"
-};
-
-TEST_F(DirectoryCreationTest, CreateDirectoriesRecursively) {
-  EXPECT_FALSE(testdata_path_.DirectoryExists()) << testdata_path_.string();
-  EXPECT_TRUE(testdata_path_.CreateDirectoriesRecursively());
-  EXPECT_TRUE(testdata_path_.DirectoryExists());
-}
-
-TEST_F(DirectoryCreationTest, CreateDirectoriesForAlreadyExistingPath) {
-  EXPECT_FALSE(testdata_path_.DirectoryExists()) << testdata_path_.string();
-  EXPECT_TRUE(testdata_path_.CreateDirectoriesRecursively());
-  // Call 'create' again... should still succeed.
-  EXPECT_TRUE(testdata_path_.CreateDirectoriesRecursively());
-}
-
-TEST_F(DirectoryCreationTest, CreateDirectoriesAndUniqueFilename) {
-  FilePath file_path(FilePath::GenerateUniqueFileName(testdata_path_,
-      FilePath("unique"), "txt"));
-  EXPECT_EQ(unique_file0_.string(), file_path.string());
-  EXPECT_FALSE(file_path.FileOrDirectoryExists());  // file not there
-
-  testdata_path_.CreateDirectoriesRecursively();
-  EXPECT_FALSE(file_path.FileOrDirectoryExists());  // file still not there
-  CreateTextFile(file_path.c_str());
-  EXPECT_TRUE(file_path.FileOrDirectoryExists());
-
-  FilePath file_path2(FilePath::GenerateUniqueFileName(testdata_path_,
-      FilePath("unique"), "txt"));
-  EXPECT_EQ(unique_file1_.string(), file_path2.string());
-  EXPECT_FALSE(file_path2.FileOrDirectoryExists());  // file not there
-  CreateTextFile(file_path2.c_str());
-  EXPECT_TRUE(file_path2.FileOrDirectoryExists());
-}
-
-TEST_F(DirectoryCreationTest, CreateDirectoriesFail) {
-  // force a failure by putting a file where we will try to create a directory.
-  CreateTextFile(testdata_file_.c_str());
-  EXPECT_TRUE(testdata_file_.FileOrDirectoryExists());
-  EXPECT_FALSE(testdata_file_.DirectoryExists());
-  EXPECT_FALSE(testdata_file_.CreateDirectoriesRecursively());
-}
-
-TEST(NoDirectoryCreationTest, CreateNoDirectoriesForDefaultXmlFile) {
-  const FilePath test_detail_xml("test_detail.xml");
-  EXPECT_FALSE(test_detail_xml.CreateDirectoriesRecursively());
-}
-
-TEST(FilePathTest, DefaultConstructor) {
-  FilePath fp;
-  EXPECT_EQ("", fp.string());
-}
-
-TEST(FilePathTest, CharAndCopyConstructors) {
-  const FilePath fp("spicy");
-  EXPECT_EQ("spicy", fp.string());
-
-  const FilePath fp_copy(fp);
-  EXPECT_EQ("spicy", fp_copy.string());
-}
-
-TEST(FilePathTest, StringConstructor) {
-  const FilePath fp(std::string("cider"));
-  EXPECT_EQ("cider", fp.string());
-}
-
-TEST(FilePathTest, Set) {
-  const FilePath apple("apple");
-  FilePath mac("mac");
-  mac.Set(apple);  // Implement Set() since overloading operator= is forbidden.
-  EXPECT_EQ("apple", mac.string());
-  EXPECT_EQ("apple", apple.string());
-}
-
-TEST(FilePathTest, ToString) {
-  const FilePath file("drink");
-  EXPECT_EQ("drink", file.string());
-}
-
-TEST(FilePathTest, RemoveExtension) {
-  EXPECT_EQ("app", FilePath("app.cc").RemoveExtension("cc").string());
-  EXPECT_EQ("app", FilePath("app.exe").RemoveExtension("exe").string());
-  EXPECT_EQ("APP", FilePath("APP.EXE").RemoveExtension("exe").string());
-}
-
-TEST(FilePathTest, RemoveExtensionWhenThereIsNoExtension) {
-  EXPECT_EQ("app", FilePath("app").RemoveExtension("exe").string());
-}
-
-TEST(FilePathTest, IsDirectory) {
-  EXPECT_FALSE(FilePath("cola").IsDirectory());
-  EXPECT_TRUE(FilePath("koala" GTEST_PATH_SEP_).IsDirectory());
-#if GTEST_HAS_ALT_PATH_SEP_
-  EXPECT_TRUE(FilePath("koala/").IsDirectory());
-#endif
-}
-
-TEST(FilePathTest, IsAbsolutePath) {
-  EXPECT_FALSE(FilePath("is" GTEST_PATH_SEP_ "relative").IsAbsolutePath());
-  EXPECT_FALSE(FilePath("").IsAbsolutePath());
-#if GTEST_OS_WINDOWS
-  EXPECT_TRUE(FilePath("c:\\" GTEST_PATH_SEP_ "is_not"
-                       GTEST_PATH_SEP_ "relative").IsAbsolutePath());
-  EXPECT_FALSE(FilePath("c:foo" GTEST_PATH_SEP_ "bar").IsAbsolutePath());
-  EXPECT_TRUE(FilePath("c:/" GTEST_PATH_SEP_ "is_not"
-                       GTEST_PATH_SEP_ "relative").IsAbsolutePath());
-#else
-  EXPECT_TRUE(FilePath(GTEST_PATH_SEP_ "is_not" GTEST_PATH_SEP_ "relative")
-              .IsAbsolutePath());
-#endif  // GTEST_OS_WINDOWS
-}
-
-TEST(FilePathTest, IsRootDirectory) {
-#if GTEST_OS_WINDOWS
-  EXPECT_TRUE(FilePath("a:\\").IsRootDirectory());
-  EXPECT_TRUE(FilePath("Z:/").IsRootDirectory());
-  EXPECT_TRUE(FilePath("e://").IsRootDirectory());
-  EXPECT_FALSE(FilePath("").IsRootDirectory());
-  EXPECT_FALSE(FilePath("b:").IsRootDirectory());
-  EXPECT_FALSE(FilePath("b:a").IsRootDirectory());
-  EXPECT_FALSE(FilePath("8:/").IsRootDirectory());
-  EXPECT_FALSE(FilePath("c|/").IsRootDirectory());
-#else
-  EXPECT_TRUE(FilePath("/").IsRootDirectory());
-  EXPECT_TRUE(FilePath("//").IsRootDirectory());
-  EXPECT_FALSE(FilePath("").IsRootDirectory());
-  EXPECT_FALSE(FilePath("\\").IsRootDirectory());
-  EXPECT_FALSE(FilePath("/x").IsRootDirectory());
-#endif
-}
-
-}  // namespace
-}  // namespace internal
-}  // namespace testing
diff --git a/3rdparty/gtest/test/googletest-filter-unittest.py b/3rdparty/gtest/test/googletest-filter-unittest.py
deleted file mode 100644
index 6b32f2d2..00000000
--- a/3rdparty/gtest/test/googletest-filter-unittest.py
+++ /dev/null
@@ -1,639 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2005 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for Google Test test filters.
-
-A user can specify which test(s) in a Google Test program to run via either
-the GTEST_FILTER environment variable or the --gtest_filter flag.
-This script tests such functionality by invoking
-googletest-filter-unittest_ (a program written with Google Test) with different
-environments and command line flags.
-
-Note that test sharding may also influence which tests are filtered. Therefore,
-we test that here also.
-"""
-
-import os
-import re
-try:
-  from sets import Set as set  # For Python 2.3 compatibility
-except ImportError:
-  pass
-import sys
-import gtest_test_utils
-
-# Constants.
-
-# Checks if this platform can pass empty environment variables to child
-# processes.  We set an env variable to an empty string and invoke a python
-# script in a subprocess to print whether the variable is STILL in
-# os.environ.  We then use 'eval' to parse the child's output so that an
-# exception is thrown if the input is anything other than 'True' nor 'False'.
-CAN_PASS_EMPTY_ENV = False
-if sys.executable:
-  os.environ['EMPTY_VAR'] = ''
-  child = gtest_test_utils.Subprocess(
-      [sys.executable, '-c', 'import os; print(\'EMPTY_VAR\' in os.environ)'])
-  CAN_PASS_EMPTY_ENV = eval(child.output)
-
-
-# Check if this platform can unset environment variables in child processes.
-# We set an env variable to a non-empty string, unset it, and invoke
-# a python script in a subprocess to print whether the variable
-# is NO LONGER in os.environ.
-# We use 'eval' to parse the child's output so that an exception
-# is thrown if the input is neither 'True' nor 'False'.
-CAN_UNSET_ENV = False
-if sys.executable:
-  os.environ['UNSET_VAR'] = 'X'
-  del os.environ['UNSET_VAR']
-  child = gtest_test_utils.Subprocess(
-      [sys.executable, '-c', 'import os; print(\'UNSET_VAR\' not in os.environ)'
-      ])
-  CAN_UNSET_ENV = eval(child.output)
-
-
-# Checks if we should test with an empty filter. This doesn't
-# make sense on platforms that cannot pass empty env variables (Win32)
-# and on platforms that cannot unset variables (since we cannot tell
-# the difference between "" and NULL -- Borland and Solaris < 5.10)
-CAN_TEST_EMPTY_FILTER = (CAN_PASS_EMPTY_ENV and CAN_UNSET_ENV)
-
-
-# The environment variable for specifying the test filters.
-FILTER_ENV_VAR = 'GTEST_FILTER'
-
-# The environment variables for test sharding.
-TOTAL_SHARDS_ENV_VAR = 'GTEST_TOTAL_SHARDS'
-SHARD_INDEX_ENV_VAR = 'GTEST_SHARD_INDEX'
-SHARD_STATUS_FILE_ENV_VAR = 'GTEST_SHARD_STATUS_FILE'
-
-# The command line flag for specifying the test filters.
-FILTER_FLAG = 'gtest_filter'
-
-# The command line flag for including disabled tests.
-ALSO_RUN_DISABLED_TESTS_FLAG = 'gtest_also_run_disabled_tests'
-
-# Command to run the googletest-filter-unittest_ program.
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-filter-unittest_')
-
-# Regex for determining whether parameterized tests are enabled in the binary.
-PARAM_TEST_REGEX = re.compile(r'/ParamTest')
-
-# Regex for parsing test case names from Google Test's output.
-TEST_CASE_REGEX = re.compile(r'^\[\-+\] \d+ tests? from (\w+(/\w+)?)')
-
-# Regex for parsing test names from Google Test's output.
-TEST_REGEX = re.compile(r'^\[\s*RUN\s*\].*\.(\w+(/\w+)?)')
-
-# The command line flag to tell Google Test to output the list of tests it
-# will run.
-LIST_TESTS_FLAG = '--gtest_list_tests'
-
-# Indicates whether Google Test supports death tests.
-SUPPORTS_DEATH_TESTS = 'HasDeathTest' in gtest_test_utils.Subprocess(
-    [COMMAND, LIST_TESTS_FLAG]).output
-
-# Full names of all tests in googletest-filter-unittests_.
-PARAM_TESTS = [
-    'SeqP/ParamTest.TestX/0',
-    'SeqP/ParamTest.TestX/1',
-    'SeqP/ParamTest.TestY/0',
-    'SeqP/ParamTest.TestY/1',
-    'SeqQ/ParamTest.TestX/0',
-    'SeqQ/ParamTest.TestX/1',
-    'SeqQ/ParamTest.TestY/0',
-    'SeqQ/ParamTest.TestY/1',
-    ]
-
-DISABLED_TESTS = [
-    'BarTest.DISABLED_TestFour',
-    'BarTest.DISABLED_TestFive',
-    'BazTest.DISABLED_TestC',
-    'DISABLED_FoobarTest.Test1',
-    'DISABLED_FoobarTest.DISABLED_Test2',
-    'DISABLED_FoobarbazTest.TestA',
-    ]
-
-if SUPPORTS_DEATH_TESTS:
-  DEATH_TESTS = [
-    'HasDeathTest.Test1',
-    'HasDeathTest.Test2',
-    ]
-else:
-  DEATH_TESTS = []
-
-# All the non-disabled tests.
-ACTIVE_TESTS = [
-    'FooTest.Abc',
-    'FooTest.Xyz',
-
-    'BarTest.TestOne',
-    'BarTest.TestTwo',
-    'BarTest.TestThree',
-
-    'BazTest.TestOne',
-    'BazTest.TestA',
-    'BazTest.TestB',
-    ] + DEATH_TESTS + PARAM_TESTS
-
-param_tests_present = None
-
-# Utilities.
-
-environ = os.environ.copy()
-
-
-def SetEnvVar(env_var, value):
-  """Sets the env variable to 'value'; unsets it when 'value' is None."""
-
-  if value is not None:
-    environ[env_var] = value
-  elif env_var in environ:
-    del environ[env_var]
-
-
-def RunAndReturnOutput(args = None):
-  """Runs the test program and returns its output."""
-
-  return gtest_test_utils.Subprocess([COMMAND] + (args or []),
-                                     env=environ).output
-
-
-def RunAndExtractTestList(args = None):
-  """Runs the test program and returns its exit code and a list of tests run."""
-
-  p = gtest_test_utils.Subprocess([COMMAND] + (args or []), env=environ)
-  tests_run = []
-  test_case = ''
-  test = ''
-  for line in p.output.split('\n'):
-    match = TEST_CASE_REGEX.match(line)
-    if match is not None:
-      test_case = match.group(1)
-    else:
-      match = TEST_REGEX.match(line)
-      if match is not None:
-        test = match.group(1)
-        tests_run.append(test_case + '.' + test)
-  return (tests_run, p.exit_code)
-
-
-def InvokeWithModifiedEnv(extra_env, function, *args, **kwargs):
-  """Runs the given function and arguments in a modified environment."""
-  try:
-    original_env = environ.copy()
-    environ.update(extra_env)
-    return function(*args, **kwargs)
-  finally:
-    environ.clear()
-    environ.update(original_env)
-
-
-def RunWithSharding(total_shards, shard_index, command):
-  """Runs a test program shard and returns exit code and a list of tests run."""
-
-  extra_env = {SHARD_INDEX_ENV_VAR: str(shard_index),
-               TOTAL_SHARDS_ENV_VAR: str(total_shards)}
-  return InvokeWithModifiedEnv(extra_env, RunAndExtractTestList, command)
-
-# The unit test.
-
-
-class GTestFilterUnitTest(gtest_test_utils.TestCase):
-  """Tests the env variable or the command line flag to filter tests."""
-
-  # Utilities.
-
-  def AssertSetEqual(self, lhs, rhs):
-    """Asserts that two sets are equal."""
-
-    for elem in lhs:
-      self.assert_(elem in rhs, '%s in %s' % (elem, rhs))
-
-    for elem in rhs:
-      self.assert_(elem in lhs, '%s in %s' % (elem, lhs))
-
-  def AssertPartitionIsValid(self, set_var, list_of_sets):
-    """Asserts that list_of_sets is a valid partition of set_var."""
-
-    full_partition = []
-    for slice_var in list_of_sets:
-      full_partition.extend(slice_var)
-    self.assertEqual(len(set_var), len(full_partition))
-    self.assertEqual(set(set_var), set(full_partition))
-
-  def AdjustForParameterizedTests(self, tests_to_run):
-    """Adjust tests_to_run in case value parameterized tests are disabled."""
-
-    global param_tests_present
-    if not param_tests_present:
-      return list(set(tests_to_run) - set(PARAM_TESTS))
-    else:
-      return tests_to_run
-
-  def RunAndVerify(self, gtest_filter, tests_to_run):
-    """Checks that the binary runs correct set of tests for a given filter."""
-
-    tests_to_run = self.AdjustForParameterizedTests(tests_to_run)
-
-    # First, tests using the environment variable.
-
-    # Windows removes empty variables from the environment when passing it
-    # to a new process.  This means it is impossible to pass an empty filter
-    # into a process using the environment variable.  However, we can still
-    # test the case when the variable is not supplied (i.e., gtest_filter is
-    # None).
-    # pylint: disable-msg=C6403
-    if CAN_TEST_EMPTY_FILTER or gtest_filter != '':
-      SetEnvVar(FILTER_ENV_VAR, gtest_filter)
-      tests_run = RunAndExtractTestList()[0]
-      SetEnvVar(FILTER_ENV_VAR, None)
-      self.AssertSetEqual(tests_run, tests_to_run)
-    # pylint: enable-msg=C6403
-
-    # Next, tests using the command line flag.
-
-    if gtest_filter is None:
-      args = []
-    else:
-      args = ['--%s=%s' % (FILTER_FLAG, gtest_filter)]
-
-    tests_run = RunAndExtractTestList(args)[0]
-    self.AssertSetEqual(tests_run, tests_to_run)
-
-  def RunAndVerifyWithSharding(self, gtest_filter, total_shards, tests_to_run,
-                               args=None, check_exit_0=False):
-    """Checks that binary runs correct tests for the given filter and shard.
-
-    Runs all shards of googletest-filter-unittest_ with the given filter, and
-    verifies that the right set of tests were run. The union of tests run
-    on each shard should be identical to tests_to_run, without duplicates.
-    If check_exit_0, .
-
-    Args:
-      gtest_filter: A filter to apply to the tests.
-      total_shards: A total number of shards to split test run into.
-      tests_to_run: A set of tests expected to run.
-      args   :      Arguments to pass to the to the test binary.
-      check_exit_0: When set to a true value, make sure that all shards
-                    return 0.
-    """
-
-    tests_to_run = self.AdjustForParameterizedTests(tests_to_run)
-
-    # Windows removes empty variables from the environment when passing it
-    # to a new process.  This means it is impossible to pass an empty filter
-    # into a process using the environment variable.  However, we can still
-    # test the case when the variable is not supplied (i.e., gtest_filter is
-    # None).
-    # pylint: disable-msg=C6403
-    if CAN_TEST_EMPTY_FILTER or gtest_filter != '':
-      SetEnvVar(FILTER_ENV_VAR, gtest_filter)
-      partition = []
-      for i in range(0, total_shards):
-        (tests_run, exit_code) = RunWithSharding(total_shards, i, args)
-        if check_exit_0:
-          self.assertEqual(0, exit_code)
-        partition.append(tests_run)
-
-      self.AssertPartitionIsValid(tests_to_run, partition)
-      SetEnvVar(FILTER_ENV_VAR, None)
-    # pylint: enable-msg=C6403
-
-  def RunAndVerifyAllowingDisabled(self, gtest_filter, tests_to_run):
-    """Checks that the binary runs correct set of tests for the given filter.
-
-    Runs googletest-filter-unittest_ with the given filter, and enables
-    disabled tests. Verifies that the right set of tests were run.
-
-    Args:
-      gtest_filter: A filter to apply to the tests.
-      tests_to_run: A set of tests expected to run.
-    """
-
-    tests_to_run = self.AdjustForParameterizedTests(tests_to_run)
-
-    # Construct the command line.
-    args = ['--%s' % ALSO_RUN_DISABLED_TESTS_FLAG]
-    if gtest_filter is not None:
-      args.append('--%s=%s' % (FILTER_FLAG, gtest_filter))
-
-    tests_run = RunAndExtractTestList(args)[0]
-    self.AssertSetEqual(tests_run, tests_to_run)
-
-  def setUp(self):
-    """Sets up test case.
-
-    Determines whether value-parameterized tests are enabled in the binary and
-    sets the flags accordingly.
-    """
-
-    global param_tests_present
-    if param_tests_present is None:
-      param_tests_present = PARAM_TEST_REGEX.search(
-          RunAndReturnOutput()) is not None
-
-  def testDefaultBehavior(self):
-    """Tests the behavior of not specifying the filter."""
-
-    self.RunAndVerify(None, ACTIVE_TESTS)
-
-  def testDefaultBehaviorWithShards(self):
-    """Tests the behavior without the filter, with sharding enabled."""
-
-    self.RunAndVerifyWithSharding(None, 1, ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding(None, 2, ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding(None, len(ACTIVE_TESTS) - 1, ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding(None, len(ACTIVE_TESTS), ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding(None, len(ACTIVE_TESTS) + 1, ACTIVE_TESTS)
-
-  def testEmptyFilter(self):
-    """Tests an empty filter."""
-
-    self.RunAndVerify('', [])
-    self.RunAndVerifyWithSharding('', 1, [])
-    self.RunAndVerifyWithSharding('', 2, [])
-
-  def testBadFilter(self):
-    """Tests a filter that matches nothing."""
-
-    self.RunAndVerify('BadFilter', [])
-    self.RunAndVerifyAllowingDisabled('BadFilter', [])
-
-  def testFullName(self):
-    """Tests filtering by full name."""
-
-    self.RunAndVerify('FooTest.Xyz', ['FooTest.Xyz'])
-    self.RunAndVerifyAllowingDisabled('FooTest.Xyz', ['FooTest.Xyz'])
-    self.RunAndVerifyWithSharding('FooTest.Xyz', 5, ['FooTest.Xyz'])
-
-  def testUniversalFilters(self):
-    """Tests filters that match everything."""
-
-    self.RunAndVerify('*', ACTIVE_TESTS)
-    self.RunAndVerify('*.*', ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding('*.*', len(ACTIVE_TESTS) - 3, ACTIVE_TESTS)
-    self.RunAndVerifyAllowingDisabled('*', ACTIVE_TESTS + DISABLED_TESTS)
-    self.RunAndVerifyAllowingDisabled('*.*', ACTIVE_TESTS + DISABLED_TESTS)
-
-  def testFilterByTestCase(self):
-    """Tests filtering by test case name."""
-
-    self.RunAndVerify('FooTest.*', ['FooTest.Abc', 'FooTest.Xyz'])
-
-    BAZ_TESTS = ['BazTest.TestOne', 'BazTest.TestA', 'BazTest.TestB']
-    self.RunAndVerify('BazTest.*', BAZ_TESTS)
-    self.RunAndVerifyAllowingDisabled('BazTest.*',
-                                      BAZ_TESTS + ['BazTest.DISABLED_TestC'])
-
-  def testFilterByTest(self):
-    """Tests filtering by test name."""
-
-    self.RunAndVerify('*.TestOne', ['BarTest.TestOne', 'BazTest.TestOne'])
-
-  def testFilterDisabledTests(self):
-    """Select only the disabled tests to run."""
-
-    self.RunAndVerify('DISABLED_FoobarTest.Test1', [])
-    self.RunAndVerifyAllowingDisabled('DISABLED_FoobarTest.Test1',
-                                      ['DISABLED_FoobarTest.Test1'])
-
-    self.RunAndVerify('*DISABLED_*', [])
-    self.RunAndVerifyAllowingDisabled('*DISABLED_*', DISABLED_TESTS)
-
-    self.RunAndVerify('*.DISABLED_*', [])
-    self.RunAndVerifyAllowingDisabled('*.DISABLED_*', [
-        'BarTest.DISABLED_TestFour',
-        'BarTest.DISABLED_TestFive',
-        'BazTest.DISABLED_TestC',
-        'DISABLED_FoobarTest.DISABLED_Test2',
-        ])
-
-    self.RunAndVerify('DISABLED_*', [])
-    self.RunAndVerifyAllowingDisabled('DISABLED_*', [
-        'DISABLED_FoobarTest.Test1',
-        'DISABLED_FoobarTest.DISABLED_Test2',
-        'DISABLED_FoobarbazTest.TestA',
-        ])
-
-  def testWildcardInTestCaseName(self):
-    """Tests using wildcard in the test case name."""
-
-    self.RunAndVerify('*a*.*', [
-        'BarTest.TestOne',
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-
-        'BazTest.TestOne',
-        'BazTest.TestA',
-        'BazTest.TestB', ] + DEATH_TESTS + PARAM_TESTS)
-
-  def testWildcardInTestName(self):
-    """Tests using wildcard in the test name."""
-
-    self.RunAndVerify('*.*A*', ['FooTest.Abc', 'BazTest.TestA'])
-
-  def testFilterWithoutDot(self):
-    """Tests a filter that has no '.' in it."""
-
-    self.RunAndVerify('*z*', [
-        'FooTest.Xyz',
-
-        'BazTest.TestOne',
-        'BazTest.TestA',
-        'BazTest.TestB',
-        ])
-
-  def testTwoPatterns(self):
-    """Tests filters that consist of two patterns."""
-
-    self.RunAndVerify('Foo*.*:*A*', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-
-        'BazTest.TestA',
-        ])
-
-    # An empty pattern + a non-empty one
-    self.RunAndVerify(':*A*', ['FooTest.Abc', 'BazTest.TestA'])
-
-  def testThreePatterns(self):
-    """Tests filters that consist of three patterns."""
-
-    self.RunAndVerify('*oo*:*A*:*One', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-
-        'BarTest.TestOne',
-
-        'BazTest.TestOne',
-        'BazTest.TestA',
-        ])
-
-    # The 2nd pattern is empty.
-    self.RunAndVerify('*oo*::*One', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-
-        'BarTest.TestOne',
-
-        'BazTest.TestOne',
-        ])
-
-    # The last 2 patterns are empty.
-    self.RunAndVerify('*oo*::', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-        ])
-
-  def testNegativeFilters(self):
-    self.RunAndVerify('*-BazTest.TestOne', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-
-        'BarTest.TestOne',
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-
-        'BazTest.TestA',
-        'BazTest.TestB',
-        ] + DEATH_TESTS + PARAM_TESTS)
-
-    self.RunAndVerify('*-FooTest.Abc:BazTest.*', [
-        'FooTest.Xyz',
-
-        'BarTest.TestOne',
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-        ] + DEATH_TESTS + PARAM_TESTS)
-
-    self.RunAndVerify('BarTest.*-BarTest.TestOne', [
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-        ])
-
-    # Tests without leading '*'.
-    self.RunAndVerify('-FooTest.Abc:FooTest.Xyz:BazTest.*', [
-        'BarTest.TestOne',
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-        ] + DEATH_TESTS + PARAM_TESTS)
-
-    # Value parameterized tests.
-    self.RunAndVerify('*/*', PARAM_TESTS)
-
-    # Value parameterized tests filtering by the sequence name.
-    self.RunAndVerify('SeqP/*', [
-        'SeqP/ParamTest.TestX/0',
-        'SeqP/ParamTest.TestX/1',
-        'SeqP/ParamTest.TestY/0',
-        'SeqP/ParamTest.TestY/1',
-        ])
-
-    # Value parameterized tests filtering by the test name.
-    self.RunAndVerify('*/0', [
-        'SeqP/ParamTest.TestX/0',
-        'SeqP/ParamTest.TestY/0',
-        'SeqQ/ParamTest.TestX/0',
-        'SeqQ/ParamTest.TestY/0',
-        ])
-
-  def testFlagOverridesEnvVar(self):
-    """Tests that the filter flag overrides the filtering env. variable."""
-
-    SetEnvVar(FILTER_ENV_VAR, 'Foo*')
-    args = ['--%s=%s' % (FILTER_FLAG, '*One')]
-    tests_run = RunAndExtractTestList(args)[0]
-    SetEnvVar(FILTER_ENV_VAR, None)
-
-    self.AssertSetEqual(tests_run, ['BarTest.TestOne', 'BazTest.TestOne'])
-
-  def testShardStatusFileIsCreated(self):
-    """Tests that the shard file is created if specified in the environment."""
-
-    shard_status_file = os.path.join(gtest_test_utils.GetTempDir(),
-                                     'shard_status_file')
-    self.assert_(not os.path.exists(shard_status_file))
-
-    extra_env = {SHARD_STATUS_FILE_ENV_VAR: shard_status_file}
-    try:
-      InvokeWithModifiedEnv(extra_env, RunAndReturnOutput)
-    finally:
-      self.assert_(os.path.exists(shard_status_file))
-      os.remove(shard_status_file)
-
-  def testShardStatusFileIsCreatedWithListTests(self):
-    """Tests that the shard file is created with the "list_tests" flag."""
-
-    shard_status_file = os.path.join(gtest_test_utils.GetTempDir(),
-                                     'shard_status_file2')
-    self.assert_(not os.path.exists(shard_status_file))
-
-    extra_env = {SHARD_STATUS_FILE_ENV_VAR: shard_status_file}
-    try:
-      output = InvokeWithModifiedEnv(extra_env,
-                                     RunAndReturnOutput,
-                                     [LIST_TESTS_FLAG])
-    finally:
-      # This assertion ensures that Google Test enumerated the tests as
-      # opposed to running them.
-      self.assert_('[==========]' not in output,
-                   'Unexpected output during test enumeration.\n'
-                   'Please ensure that LIST_TESTS_FLAG is assigned the\n'
-                   'correct flag value for listing Google Test tests.')
-
-      self.assert_(os.path.exists(shard_status_file))
-      os.remove(shard_status_file)
-
-  if SUPPORTS_DEATH_TESTS:
-    def testShardingWorksWithDeathTests(self):
-      """Tests integration with death tests and sharding."""
-
-      gtest_filter = 'HasDeathTest.*:SeqP/*'
-      expected_tests = [
-          'HasDeathTest.Test1',
-          'HasDeathTest.Test2',
-
-          'SeqP/ParamTest.TestX/0',
-          'SeqP/ParamTest.TestX/1',
-          'SeqP/ParamTest.TestY/0',
-          'SeqP/ParamTest.TestY/1',
-          ]
-
-      for flag in ['--gtest_death_test_style=threadsafe',
-                   '--gtest_death_test_style=fast']:
-        self.RunAndVerifyWithSharding(gtest_filter, 3, expected_tests,
-                                      check_exit_0=True, args=[flag])
-        self.RunAndVerifyWithSharding(gtest_filter, 5, expected_tests,
-                                      check_exit_0=True, args=[flag])
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-filter-unittest_.cc b/3rdparty/gtest/test/googletest-filter-unittest_.cc
deleted file mode 100644
index d30ec9c7..00000000
--- a/3rdparty/gtest/test/googletest-filter-unittest_.cc
+++ /dev/null
@@ -1,137 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Unit test for Google Test test filters.
-//
-// A user can specify which test(s) in a Google Test program to run via
-// either the GTEST_FILTER environment variable or the --gtest_filter
-// flag.  This is used for testing such functionality.
-//
-// The program will be invoked from a Python unit test.  Don't run it
-// directly.
-
-#include "gtest/gtest.h"
-
-namespace {
-
-// Test case FooTest.
-
-class FooTest : public testing::Test {
-};
-
-TEST_F(FooTest, Abc) {
-}
-
-TEST_F(FooTest, Xyz) {
-  FAIL() << "Expected failure.";
-}
-
-// Test case BarTest.
-
-TEST(BarTest, TestOne) {
-}
-
-TEST(BarTest, TestTwo) {
-}
-
-TEST(BarTest, TestThree) {
-}
-
-TEST(BarTest, DISABLED_TestFour) {
-  FAIL() << "Expected failure.";
-}
-
-TEST(BarTest, DISABLED_TestFive) {
-  FAIL() << "Expected failure.";
-}
-
-// Test case BazTest.
-
-TEST(BazTest, TestOne) {
-  FAIL() << "Expected failure.";
-}
-
-TEST(BazTest, TestA) {
-}
-
-TEST(BazTest, TestB) {
-}
-
-TEST(BazTest, DISABLED_TestC) {
-  FAIL() << "Expected failure.";
-}
-
-// Test case HasDeathTest
-
-TEST(HasDeathTest, Test1) {
-  EXPECT_DEATH_IF_SUPPORTED(exit(1), ".*");
-}
-
-// We need at least two death tests to make sure that the all death tests
-// aren't on the first shard.
-TEST(HasDeathTest, Test2) {
-  EXPECT_DEATH_IF_SUPPORTED(exit(1), ".*");
-}
-
-// Test case FoobarTest
-
-TEST(DISABLED_FoobarTest, Test1) {
-  FAIL() << "Expected failure.";
-}
-
-TEST(DISABLED_FoobarTest, DISABLED_Test2) {
-  FAIL() << "Expected failure.";
-}
-
-// Test case FoobarbazTest
-
-TEST(DISABLED_FoobarbazTest, TestA) {
-  FAIL() << "Expected failure.";
-}
-
-class ParamTest : public testing::TestWithParam<int> {
-};
-
-TEST_P(ParamTest, TestX) {
-}
-
-TEST_P(ParamTest, TestY) {
-}
-
-INSTANTIATE_TEST_SUITE_P(SeqP, ParamTest, testing::Values(1, 2));
-INSTANTIATE_TEST_SUITE_P(SeqQ, ParamTest, testing::Values(5, 6));
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-json-outfiles-test.py b/3rdparty/gtest/test/googletest-json-outfiles-test.py
deleted file mode 100644
index 8ef47b8f..00000000
--- a/3rdparty/gtest/test/googletest-json-outfiles-test.py
+++ /dev/null
@@ -1,191 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2018, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for the gtest_json_output module."""
-
-import json
-import os
-import gtest_json_test_utils
-import gtest_test_utils
-
-GTEST_OUTPUT_SUBDIR = 'json_outfiles'
-GTEST_OUTPUT_1_TEST = 'gtest_xml_outfile1_test_'
-GTEST_OUTPUT_2_TEST = 'gtest_xml_outfile2_test_'
-
-EXPECTED_1 = {
-    u'tests':
-        1,
-    u'failures':
-        0,
-    u'disabled':
-        0,
-    u'errors':
-        0,
-    u'time':
-        u'*',
-    u'timestamp':
-        u'*',
-    u'name':
-        u'AllTests',
-    u'testsuites': [{
-        u'name':
-            u'PropertyOne',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'TestSomeProperties',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyOne',
-            u'SetUpProp': u'1',
-            u'TestSomeProperty': u'1',
-            u'TearDownProp': u'1',
-        }],
-    }],
-}
-
-EXPECTED_2 = {
-    u'tests':
-        1,
-    u'failures':
-        0,
-    u'disabled':
-        0,
-    u'errors':
-        0,
-    u'time':
-        u'*',
-    u'timestamp':
-        u'*',
-    u'name':
-        u'AllTests',
-    u'testsuites': [{
-        u'name':
-            u'PropertyTwo',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'TestSomeProperties',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'timestamp': u'*',
-            u'time': u'*',
-            u'classname': u'PropertyTwo',
-            u'SetUpProp': u'2',
-            u'TestSomeProperty': u'2',
-            u'TearDownProp': u'2',
-        }],
-    }],
-}
-
-
-class GTestJsonOutFilesTest(gtest_test_utils.TestCase):
-  """Unit test for Google Test's JSON output functionality."""
-
-  def setUp(self):
-    # We want the trailing '/' that the last "" provides in os.path.join, for
-    # telling Google Test to create an output directory instead of a single file
-    # for xml output.
-    self.output_dir_ = os.path.join(gtest_test_utils.GetTempDir(),
-                                    GTEST_OUTPUT_SUBDIR, '')
-    self.DeleteFilesAndDir()
-
-  def tearDown(self):
-    self.DeleteFilesAndDir()
-
-  def DeleteFilesAndDir(self):
-    try:
-      os.remove(os.path.join(self.output_dir_, GTEST_OUTPUT_1_TEST + '.json'))
-    except os.error:
-      pass
-    try:
-      os.remove(os.path.join(self.output_dir_, GTEST_OUTPUT_2_TEST + '.json'))
-    except os.error:
-      pass
-    try:
-      os.rmdir(self.output_dir_)
-    except os.error:
-      pass
-
-  def testOutfile1(self):
-    self._TestOutFile(GTEST_OUTPUT_1_TEST, EXPECTED_1)
-
-  def testOutfile2(self):
-    self._TestOutFile(GTEST_OUTPUT_2_TEST, EXPECTED_2)
-
-  def _TestOutFile(self, test_name, expected):
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(test_name)
-    command = [gtest_prog_path, '--gtest_output=json:%s' % self.output_dir_]
-    p = gtest_test_utils.Subprocess(command,
-                                    working_dir=gtest_test_utils.GetTempDir())
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-
-    output_file_name1 = test_name + '.json'
-    output_file1 = os.path.join(self.output_dir_, output_file_name1)
-    output_file_name2 = 'lt-' + output_file_name1
-    output_file2 = os.path.join(self.output_dir_, output_file_name2)
-    self.assert_(os.path.isfile(output_file1) or os.path.isfile(output_file2),
-                 output_file1)
-
-    if os.path.isfile(output_file1):
-      with open(output_file1) as f:
-        actual = json.load(f)
-    else:
-      with open(output_file2) as f:
-        actual = json.load(f)
-    self.assertEqual(expected, gtest_json_test_utils.normalize(actual))
-
-
-if __name__ == '__main__':
-  os.environ['GTEST_STACK_TRACE_DEPTH'] = '0'
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-json-output-unittest.py b/3rdparty/gtest/test/googletest-json-output-unittest.py
deleted file mode 100644
index 15861f75..00000000
--- a/3rdparty/gtest/test/googletest-json-output-unittest.py
+++ /dev/null
@@ -1,778 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2018, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for the gtest_json_output module."""
-
-import datetime
-import errno
-import json
-import os
-import re
-import sys
-
-import gtest_json_test_utils
-import gtest_test_utils
-
-GTEST_FILTER_FLAG = '--gtest_filter'
-GTEST_LIST_TESTS_FLAG = '--gtest_list_tests'
-GTEST_OUTPUT_FLAG = '--gtest_output'
-GTEST_DEFAULT_OUTPUT_FILE = 'test_detail.json'
-GTEST_PROGRAM_NAME = 'gtest_xml_output_unittest_'
-
-# The flag indicating stacktraces are not supported
-NO_STACKTRACE_SUPPORT_FLAG = '--no_stacktrace_support'
-
-SUPPORTS_STACK_TRACES = NO_STACKTRACE_SUPPORT_FLAG not in sys.argv
-
-if SUPPORTS_STACK_TRACES:
-  STACK_TRACE_TEMPLATE = '\nStack trace:\n*'
-else:
-  STACK_TRACE_TEMPLATE = ''
-
-EXPECTED_NON_EMPTY = {
-    u'tests':
-        24,
-    u'failures':
-        4,
-    u'disabled':
-        2,
-    u'errors':
-        0,
-    u'timestamp':
-        u'*',
-    u'time':
-        u'*',
-    u'ad_hoc_property':
-        u'42',
-    u'name':
-        u'AllTests',
-    u'testsuites': [{
-        u'name':
-            u'SuccessfulTest',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'Succeeds',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'SuccessfulTest'
-        }]
-    }, {
-        u'name':
-            u'FailedTest',
-        u'tests':
-            1,
-        u'failures':
-            1,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name':
-                u'Fails',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'FailedTest',
-            u'failures': [{
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Expected equality of these values:\n'
-                            u'  1\n  2' + STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }]
-        }]
-    }, {
-        u'name':
-            u'DisabledTest',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            1,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'DISABLED_test_not_run',
-            u'status': u'NOTRUN',
-            u'result': u'SUPPRESSED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'DisabledTest'
-        }]
-    }, {
-        u'name':
-            u'SkippedTest',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'Skipped',
-            u'status': u'RUN',
-            u'result': u'SKIPPED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'SkippedTest'
-        }]
-    }, {
-        u'name':
-            u'MixedResultTest',
-        u'tests':
-            3,
-        u'failures':
-            1,
-        u'disabled':
-            1,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'Succeeds',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'MixedResultTest'
-        }, {
-            u'name':
-                u'Fails',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'MixedResultTest',
-            u'failures': [{
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Expected equality of these values:\n'
-                            u'  1\n  2' + STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }, {
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Expected equality of these values:\n'
-                            u'  2\n  3' + STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }]
-        }, {
-            u'name': u'DISABLED_test',
-            u'status': u'NOTRUN',
-            u'result': u'SUPPRESSED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'MixedResultTest'
-        }]
-    }, {
-        u'name':
-            u'XmlQuotingTest',
-        u'tests':
-            1,
-        u'failures':
-            1,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name':
-                u'OutputsCData',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'XmlQuotingTest',
-            u'failures': [{
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Failed\nXML output: <?xml encoding="utf-8">'
-                            u'<top><![CDATA[cdata text]]></top>' +
-                            STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }]
-        }]
-    }, {
-        u'name':
-            u'InvalidCharactersTest',
-        u'tests':
-            1,
-        u'failures':
-            1,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name':
-                u'InvalidCharactersInMessage',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'InvalidCharactersTest',
-            u'failures': [{
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Failed\nInvalid characters in brackets'
-                            u' [\x01\x02]' + STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }]
-        }]
-    }, {
-        u'name':
-            u'PropertyRecordingTest',
-        u'tests':
-            4,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'SetUpTestSuite':
-            u'yes',
-        u'TearDownTestSuite':
-            u'aye',
-        u'testsuite': [{
-            u'name': u'OneProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyRecordingTest',
-            u'key_1': u'1'
-        }, {
-            u'name': u'IntValuedProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyRecordingTest',
-            u'key_int': u'1'
-        }, {
-            u'name': u'ThreeProperties',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyRecordingTest',
-            u'key_1': u'1',
-            u'key_2': u'2',
-            u'key_3': u'3'
-        }, {
-            u'name': u'TwoValuesForOneKeyUsesLastValue',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyRecordingTest',
-            u'key_1': u'2'
-        }]
-    }, {
-        u'name':
-            u'NoFixtureTest',
-        u'tests':
-            3,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'RecordProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'NoFixtureTest',
-            u'key': u'1'
-        }, {
-            u'name': u'ExternalUtilityThatCallsRecordIntValuedProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'NoFixtureTest',
-            u'key_for_utility_int': u'1'
-        }, {
-            u'name': u'ExternalUtilityThatCallsRecordStringValuedProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'NoFixtureTest',
-            u'key_for_utility_string': u'1'
-        }]
-    }, {
-        u'name':
-            u'TypedTest/0',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasTypeParamAttribute',
-            u'type_param': u'int',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'TypedTest/0'
-        }]
-    }, {
-        u'name':
-            u'TypedTest/1',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasTypeParamAttribute',
-            u'type_param': u'long',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'TypedTest/1'
-        }]
-    }, {
-        u'name':
-            u'Single/TypeParameterizedTestSuite/0',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasTypeParamAttribute',
-            u'type_param': u'int',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/TypeParameterizedTestSuite/0'
-        }]
-    }, {
-        u'name':
-            u'Single/TypeParameterizedTestSuite/1',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasTypeParamAttribute',
-            u'type_param': u'long',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/TypeParameterizedTestSuite/1'
-        }]
-    }, {
-        u'name':
-            u'Single/ValueParamTest',
-        u'tests':
-            4,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasValueParamAttribute/0',
-            u'value_param': u'33',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/ValueParamTest'
-        }, {
-            u'name': u'HasValueParamAttribute/1',
-            u'value_param': u'42',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/ValueParamTest'
-        }, {
-            u'name': u'AnotherTestThatHasValueParamAttribute/0',
-            u'value_param': u'33',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/ValueParamTest'
-        }, {
-            u'name': u'AnotherTestThatHasValueParamAttribute/1',
-            u'value_param': u'42',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/ValueParamTest'
-        }]
-    }]
-}
-
-EXPECTED_FILTERED = {
-    u'tests':
-        1,
-    u'failures':
-        0,
-    u'disabled':
-        0,
-    u'errors':
-        0,
-    u'time':
-        u'*',
-    u'timestamp':
-        u'*',
-    u'name':
-        u'AllTests',
-    u'ad_hoc_property':
-        u'42',
-    u'testsuites': [{
-        u'name':
-            u'SuccessfulTest',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'Succeeds',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'SuccessfulTest',
-        }]
-    }],
-}
-
-EXPECTED_EMPTY = {
-    u'tests': 0,
-    u'failures': 0,
-    u'disabled': 0,
-    u'errors': 0,
-    u'time': u'*',
-    u'timestamp': u'*',
-    u'name': u'AllTests',
-    u'testsuites': [],
-}
-
-GTEST_PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath(GTEST_PROGRAM_NAME)
-
-SUPPORTS_TYPED_TESTS = 'TypedTest' in gtest_test_utils.Subprocess(
-    [GTEST_PROGRAM_PATH, GTEST_LIST_TESTS_FLAG], capture_stderr=False).output
-
-
-class GTestJsonOutputUnitTest(gtest_test_utils.TestCase):
-  """Unit test for Google Test's JSON output functionality.
-  """
-
-  # This test currently breaks on platforms that do not support typed and
-  # type-parameterized tests, so we don't run it under them.
-  if SUPPORTS_TYPED_TESTS:
-
-    def testNonEmptyJsonOutput(self):
-      """Verifies JSON output for a Google Test binary with non-empty output.
-
-      Runs a test program that generates a non-empty JSON output, and
-      tests that the JSON output is expected.
-      """
-      self._TestJsonOutput(GTEST_PROGRAM_NAME, EXPECTED_NON_EMPTY, 1)
-
-  def testEmptyJsonOutput(self):
-    """Verifies JSON output for a Google Test binary without actual tests.
-
-    Runs a test program that generates an empty JSON output, and
-    tests that the JSON output is expected.
-    """
-
-    self._TestJsonOutput('gtest_no_test_unittest', EXPECTED_EMPTY, 0)
-
-  def testTimestampValue(self):
-    """Checks whether the timestamp attribute in the JSON output is valid.
-
-    Runs a test program that generates an empty JSON output, and checks if
-    the timestamp attribute in the testsuites tag is valid.
-    """
-    actual = self._GetJsonOutput('gtest_no_test_unittest', [], 0)
-    date_time_str = actual['timestamp']
-    # datetime.strptime() is only available in Python 2.5+ so we have to
-    # parse the expected datetime manually.
-    match = re.match(r'(\d+)-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)', date_time_str)
-    self.assertTrue(
-        re.match,
-        'JSON datettime string %s has incorrect format' % date_time_str)
-    date_time_from_json = datetime.datetime(
-        year=int(match.group(1)), month=int(match.group(2)),
-        day=int(match.group(3)), hour=int(match.group(4)),
-        minute=int(match.group(5)), second=int(match.group(6)))
-
-    time_delta = abs(datetime.datetime.now() - date_time_from_json)
-    # timestamp value should be near the current local time
-    self.assertTrue(time_delta < datetime.timedelta(seconds=600),
-                    'time_delta is %s' % time_delta)
-
-  def testDefaultOutputFile(self):
-    """Verifies the default output file name.
-
-    Confirms that Google Test produces an JSON output file with the expected
-    default name if no name is explicitly specified.
-    """
-    output_file = os.path.join(gtest_test_utils.GetTempDir(),
-                               GTEST_DEFAULT_OUTPUT_FILE)
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(
-        'gtest_no_test_unittest')
-    try:
-      os.remove(output_file)
-    except OSError:
-      e = sys.exc_info()[1]
-      if e.errno != errno.ENOENT:
-        raise
-
-    p = gtest_test_utils.Subprocess(
-        [gtest_prog_path, '%s=json' % GTEST_OUTPUT_FLAG],
-        working_dir=gtest_test_utils.GetTempDir())
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-    self.assert_(os.path.isfile(output_file))
-
-  def testSuppressedJsonOutput(self):
-    """Verifies that no JSON output is generated.
-
-    Tests that no JSON file is generated if the default JSON listener is
-    shut down before RUN_ALL_TESTS is invoked.
-    """
-
-    json_path = os.path.join(gtest_test_utils.GetTempDir(),
-                             GTEST_PROGRAM_NAME + 'out.json')
-    if os.path.isfile(json_path):
-      os.remove(json_path)
-
-    command = [GTEST_PROGRAM_PATH,
-               '%s=json:%s' % (GTEST_OUTPUT_FLAG, json_path),
-               '--shut_down_xml']
-    p = gtest_test_utils.Subprocess(command)
-    if p.terminated_by_signal:
-      # p.signal is available only if p.terminated_by_signal is True.
-      self.assertFalse(
-          p.terminated_by_signal,
-          '%s was killed by signal %d' % (GTEST_PROGRAM_NAME, p.signal))
-    else:
-      self.assert_(p.exited)
-      self.assertEquals(1, p.exit_code,
-                        "'%s' exited with code %s, which doesn't match "
-                        'the expected exit code %s.'
-                        % (command, p.exit_code, 1))
-
-    self.assert_(not os.path.isfile(json_path))
-
-  def testFilteredTestJsonOutput(self):
-    """Verifies JSON output when a filter is applied.
-
-    Runs a test program that executes only some tests and verifies that
-    non-selected tests do not show up in the JSON output.
-    """
-
-    self._TestJsonOutput(GTEST_PROGRAM_NAME, EXPECTED_FILTERED, 0,
-                         extra_args=['%s=SuccessfulTest.*' % GTEST_FILTER_FLAG])
-
-  def _GetJsonOutput(self, gtest_prog_name, extra_args, expected_exit_code):
-    """Returns the JSON output generated by running the program gtest_prog_name.
-
-    Furthermore, the program's exit code must be expected_exit_code.
-
-    Args:
-      gtest_prog_name: Google Test binary name.
-      extra_args: extra arguments to binary invocation.
-      expected_exit_code: program's exit code.
-    """
-    json_path = os.path.join(gtest_test_utils.GetTempDir(),
-                             gtest_prog_name + 'out.json')
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(gtest_prog_name)
-
-    command = (
-        [gtest_prog_path, '%s=json:%s' % (GTEST_OUTPUT_FLAG, json_path)] +
-        extra_args
-    )
-    p = gtest_test_utils.Subprocess(command)
-    if p.terminated_by_signal:
-      self.assert_(False,
-                   '%s was killed by signal %d' % (gtest_prog_name, p.signal))
-    else:
-      self.assert_(p.exited)
-      self.assertEquals(expected_exit_code, p.exit_code,
-                        "'%s' exited with code %s, which doesn't match "
-                        'the expected exit code %s.'
-                        % (command, p.exit_code, expected_exit_code))
-    with open(json_path) as f:
-      actual = json.load(f)
-    return actual
-
-  def _TestJsonOutput(self, gtest_prog_name, expected,
-                      expected_exit_code, extra_args=None):
-    """Checks the JSON output generated by the Google Test binary.
-
-    Asserts that the JSON document generated by running the program
-    gtest_prog_name matches expected_json, a string containing another
-    JSON document.  Furthermore, the program's exit code must be
-    expected_exit_code.
-
-    Args:
-      gtest_prog_name: Google Test binary name.
-      expected: expected output.
-      expected_exit_code: program's exit code.
-      extra_args: extra arguments to binary invocation.
-    """
-
-    actual = self._GetJsonOutput(gtest_prog_name, extra_args or [],
-                                 expected_exit_code)
-    self.assertEqual(expected, gtest_json_test_utils.normalize(actual))
-
-
-if __name__ == '__main__':
-  if NO_STACKTRACE_SUPPORT_FLAG in sys.argv:
-    # unittest.main() can't handle unknown flags
-    sys.argv.remove(NO_STACKTRACE_SUPPORT_FLAG)
-
-  os.environ['GTEST_STACK_TRACE_DEPTH'] = '1'
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-list-tests-unittest.py b/3rdparty/gtest/test/googletest-list-tests-unittest.py
deleted file mode 100644
index 81423a33..00000000
--- a/3rdparty/gtest/test/googletest-list-tests-unittest.py
+++ /dev/null
@@ -1,205 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for Google Test's --gtest_list_tests flag.
-
-A user can ask Google Test to list all tests by specifying the
---gtest_list_tests flag.  This script tests such functionality
-by invoking googletest-list-tests-unittest_ (a program written with
-Google Test) the command line flags.
-"""
-
-import re
-import gtest_test_utils
-
-# Constants.
-
-# The command line flag for enabling/disabling listing all tests.
-LIST_TESTS_FLAG = 'gtest_list_tests'
-
-# Path to the googletest-list-tests-unittest_ program.
-EXE_PATH = gtest_test_utils.GetTestExecutablePath('googletest-list-tests-unittest_')
-
-# The expected output when running googletest-list-tests-unittest_ with
-# --gtest_list_tests
-EXPECTED_OUTPUT_NO_FILTER_RE = re.compile(r"""FooDeathTest\.
-  Test1
-Foo\.
-  Bar1
-  Bar2
-  DISABLED_Bar3
-Abc\.
-  Xyz
-  Def
-FooBar\.
-  Baz
-FooTest\.
-  Test1
-  DISABLED_Test2
-  Test3
-TypedTest/0\.  # TypeParam = (VeryLo{245}|class VeryLo{239})\.\.\.
-  TestA
-  TestB
-TypedTest/1\.  # TypeParam = int\s*\*( __ptr64)?
-  TestA
-  TestB
-TypedTest/2\.  # TypeParam = .*MyArray<bool,\s*42>
-  TestA
-  TestB
-My/TypeParamTest/0\.  # TypeParam = (VeryLo{245}|class VeryLo{239})\.\.\.
-  TestA
-  TestB
-My/TypeParamTest/1\.  # TypeParam = int\s*\*( __ptr64)?
-  TestA
-  TestB
-My/TypeParamTest/2\.  # TypeParam = .*MyArray<bool,\s*42>
-  TestA
-  TestB
-MyInstantiation/ValueParamTest\.
-  TestA/0  # GetParam\(\) = one line
-  TestA/1  # GetParam\(\) = two\\nlines
-  TestA/2  # GetParam\(\) = a very\\nlo{241}\.\.\.
-  TestB/0  # GetParam\(\) = one line
-  TestB/1  # GetParam\(\) = two\\nlines
-  TestB/2  # GetParam\(\) = a very\\nlo{241}\.\.\.
-""")
-
-# The expected output when running googletest-list-tests-unittest_ with
-# --gtest_list_tests and --gtest_filter=Foo*.
-EXPECTED_OUTPUT_FILTER_FOO_RE = re.compile(r"""FooDeathTest\.
-  Test1
-Foo\.
-  Bar1
-  Bar2
-  DISABLED_Bar3
-FooBar\.
-  Baz
-FooTest\.
-  Test1
-  DISABLED_Test2
-  Test3
-""")
-
-# Utilities.
-
-
-def Run(args):
-  """Runs googletest-list-tests-unittest_ and returns the list of tests printed."""
-
-  return gtest_test_utils.Subprocess([EXE_PATH] + args,
-                                     capture_stderr=False).output
-
-
-# The unit test.
-
-
-class GTestListTestsUnitTest(gtest_test_utils.TestCase):
-  """Tests using the --gtest_list_tests flag to list all tests."""
-
-  def RunAndVerify(self, flag_value, expected_output_re, other_flag):
-    """Runs googletest-list-tests-unittest_ and verifies that it prints
-    the correct tests.
-
-    Args:
-      flag_value:         value of the --gtest_list_tests flag;
-                          None if the flag should not be present.
-      expected_output_re: regular expression that matches the expected
-                          output after running command;
-      other_flag:         a different flag to be passed to command
-                          along with gtest_list_tests;
-                          None if the flag should not be present.
-    """
-
-    if flag_value is None:
-      flag = ''
-      flag_expression = 'not set'
-    elif flag_value == '0':
-      flag = '--%s=0' % LIST_TESTS_FLAG
-      flag_expression = '0'
-    else:
-      flag = '--%s' % LIST_TESTS_FLAG
-      flag_expression = '1'
-
-    args = [flag]
-
-    if other_flag is not None:
-      args += [other_flag]
-
-    output = Run(args)
-
-    if expected_output_re:
-      self.assert_(
-          expected_output_re.match(output),
-          ('when %s is %s, the output of "%s" is "%s",\n'
-           'which does not match regex "%s"' %
-           (LIST_TESTS_FLAG, flag_expression, ' '.join(args), output,
-            expected_output_re.pattern)))
-    else:
-      self.assert_(
-          not EXPECTED_OUTPUT_NO_FILTER_RE.match(output),
-          ('when %s is %s, the output of "%s" is "%s"'%
-           (LIST_TESTS_FLAG, flag_expression, ' '.join(args), output)))
-
-  def testDefaultBehavior(self):
-    """Tests the behavior of the default mode."""
-
-    self.RunAndVerify(flag_value=None,
-                      expected_output_re=None,
-                      other_flag=None)
-
-  def testFlag(self):
-    """Tests using the --gtest_list_tests flag."""
-
-    self.RunAndVerify(flag_value='0',
-                      expected_output_re=None,
-                      other_flag=None)
-    self.RunAndVerify(flag_value='1',
-                      expected_output_re=EXPECTED_OUTPUT_NO_FILTER_RE,
-                      other_flag=None)
-
-  def testOverrideNonFilterFlags(self):
-    """Tests that --gtest_list_tests overrides the non-filter flags."""
-
-    self.RunAndVerify(flag_value='1',
-                      expected_output_re=EXPECTED_OUTPUT_NO_FILTER_RE,
-                      other_flag='--gtest_break_on_failure')
-
-  def testWithFilterFlags(self):
-    """Tests that --gtest_list_tests takes into account the
-    --gtest_filter flag."""
-
-    self.RunAndVerify(flag_value='1',
-                      expected_output_re=EXPECTED_OUTPUT_FILTER_FOO_RE,
-                      other_flag='--gtest_filter=Foo*')
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-list-tests-unittest_.cc b/3rdparty/gtest/test/googletest-list-tests-unittest_.cc
deleted file mode 100644
index 493c6f00..00000000
--- a/3rdparty/gtest/test/googletest-list-tests-unittest_.cc
+++ /dev/null
@@ -1,156 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Unit test for Google Test's --gtest_list_tests flag.
-//
-// A user can ask Google Test to list all tests that will run
-// so that when using a filter, a user will know what
-// tests to look for. The tests will not be run after listing.
-//
-// This program will be invoked from a Python unit test.
-// Don't run it directly.
-
-#include "gtest/gtest.h"
-
-// Several different test cases and tests that will be listed.
-TEST(Foo, Bar1) {
-}
-
-TEST(Foo, Bar2) {
-}
-
-TEST(Foo, DISABLED_Bar3) {
-}
-
-TEST(Abc, Xyz) {
-}
-
-TEST(Abc, Def) {
-}
-
-TEST(FooBar, Baz) {
-}
-
-class FooTest : public testing::Test {
-};
-
-TEST_F(FooTest, Test1) {
-}
-
-TEST_F(FooTest, DISABLED_Test2) {
-}
-
-TEST_F(FooTest, Test3) {
-}
-
-TEST(FooDeathTest, Test1) {
-}
-
-// A group of value-parameterized tests.
-
-class MyType {
- public:
-  explicit MyType(const std::string& a_value) : value_(a_value) {}
-
-  const std::string& value() const { return value_; }
-
- private:
-  std::string value_;
-};
-
-// Teaches Google Test how to print a MyType.
-void PrintTo(const MyType& x, std::ostream* os) {
-  *os << x.value();
-}
-
-class ValueParamTest : public testing::TestWithParam<MyType> {
-};
-
-TEST_P(ValueParamTest, TestA) {
-}
-
-TEST_P(ValueParamTest, TestB) {
-}
-
-INSTANTIATE_TEST_SUITE_P(
-    MyInstantiation, ValueParamTest,
-    testing::Values(MyType("one line"),
-                    MyType("two\nlines"),
-                    MyType("a very\nloooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong line")));  // NOLINT
-
-// A group of typed tests.
-
-// A deliberately long type name for testing the line-truncating
-// behavior when printing a type parameter.
-class VeryLoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooogName {  // NOLINT
-};
-
-template <typename T>
-class TypedTest : public testing::Test {
-};
-
-template <typename T, int kSize>
-class MyArray {
-};
-
-typedef testing::Types<VeryLoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooogName,  // NOLINT
-                       int*, MyArray<bool, 42> > MyTypes;
-
-TYPED_TEST_SUITE(TypedTest, MyTypes);
-
-TYPED_TEST(TypedTest, TestA) {
-}
-
-TYPED_TEST(TypedTest, TestB) {
-}
-
-// A group of type-parameterized tests.
-
-template <typename T>
-class TypeParamTest : public testing::Test {
-};
-
-TYPED_TEST_SUITE_P(TypeParamTest);
-
-TYPED_TEST_P(TypeParamTest, TestA) {
-}
-
-TYPED_TEST_P(TypeParamTest, TestB) {
-}
-
-REGISTER_TYPED_TEST_SUITE_P(TypeParamTest, TestA, TestB);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, TypeParamTest, MyTypes);
-
-int main(int argc, char **argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-listener-test.cc b/3rdparty/gtest/test/googletest-listener-test.cc
deleted file mode 100644
index 10457afe..00000000
--- a/3rdparty/gtest/test/googletest-listener-test.cc
+++ /dev/null
@@ -1,518 +0,0 @@
-// Copyright 2009 Google Inc. All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file verifies Google Test event listeners receive events at the
-// right times.
-
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "gtest/internal/custom/gtest.h"
-
-using ::testing::AddGlobalTestEnvironment;
-using ::testing::Environment;
-using ::testing::InitGoogleTest;
-using ::testing::Test;
-using ::testing::TestSuite;
-using ::testing::TestEventListener;
-using ::testing::TestInfo;
-using ::testing::TestPartResult;
-using ::testing::UnitTest;
-
-// Used by tests to register their events.
-std::vector<std::string>* g_events = nullptr;
-
-namespace testing {
-namespace internal {
-
-class EventRecordingListener : public TestEventListener {
- public:
-  explicit EventRecordingListener(const char* name) : name_(name) {}
-
- protected:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnTestProgramStart"));
-  }
-
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int iteration) override {
-    Message message;
-    message << GetFullMethodName("OnTestIterationStart")
-            << "(" << iteration << ")";
-    g_events->push_back(message.GetString());
-  }
-
-  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsSetUpStart"));
-  }
-
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsSetUpEnd"));
-  }
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestCase& /*test_case*/) override {
-    g_events->push_back(GetFullMethodName("OnTestCaseStart"));
-  }
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnTestStart(const TestInfo& /*test_info*/) override {
-    g_events->push_back(GetFullMethodName("OnTestStart"));
-  }
-
-  void OnTestPartResult(const TestPartResult& /*test_part_result*/) override {
-    g_events->push_back(GetFullMethodName("OnTestPartResult"));
-  }
-
-  void OnTestEnd(const TestInfo& /*test_info*/) override {
-    g_events->push_back(GetFullMethodName("OnTestEnd"));
-  }
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& /*test_case*/) override {
-    g_events->push_back(GetFullMethodName("OnTestCaseEnd"));
-  }
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsTearDownStart"));
-  }
-
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsTearDownEnd"));
-  }
-
-  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                          int iteration) override {
-    Message message;
-    message << GetFullMethodName("OnTestIterationEnd")
-            << "("  << iteration << ")";
-    g_events->push_back(message.GetString());
-  }
-
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnTestProgramEnd"));
-  }
-
- private:
-  std::string GetFullMethodName(const char* name) {
-    return name_ + "." + name;
-  }
-
-  std::string name_;
-};
-
-// This listener is using OnTestSuiteStart, OnTestSuiteEnd API
-class EventRecordingListener2 : public TestEventListener {
- public:
-  explicit EventRecordingListener2(const char* name) : name_(name) {}
-
- protected:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnTestProgramStart"));
-  }
-
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int iteration) override {
-    Message message;
-    message << GetFullMethodName("OnTestIterationStart") << "(" << iteration
-            << ")";
-    g_events->push_back(message.GetString());
-  }
-
-  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsSetUpStart"));
-  }
-
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsSetUpEnd"));
-  }
-
-  void OnTestSuiteStart(const TestSuite& /*test_suite*/) override {
-    g_events->push_back(GetFullMethodName("OnTestSuiteStart"));
-  }
-
-  void OnTestStart(const TestInfo& /*test_info*/) override {
-    g_events->push_back(GetFullMethodName("OnTestStart"));
-  }
-
-  void OnTestPartResult(const TestPartResult& /*test_part_result*/) override {
-    g_events->push_back(GetFullMethodName("OnTestPartResult"));
-  }
-
-  void OnTestEnd(const TestInfo& /*test_info*/) override {
-    g_events->push_back(GetFullMethodName("OnTestEnd"));
-  }
-
-  void OnTestSuiteEnd(const TestSuite& /*test_suite*/) override {
-    g_events->push_back(GetFullMethodName("OnTestSuiteEnd"));
-  }
-
-  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsTearDownStart"));
-  }
-
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsTearDownEnd"));
-  }
-
-  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                          int iteration) override {
-    Message message;
-    message << GetFullMethodName("OnTestIterationEnd") << "(" << iteration
-            << ")";
-    g_events->push_back(message.GetString());
-  }
-
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnTestProgramEnd"));
-  }
-
- private:
-  std::string GetFullMethodName(const char* name) { return name_ + "." + name; }
-
-  std::string name_;
-};
-
-class EnvironmentInvocationCatcher : public Environment {
- protected:
-  void SetUp() override { g_events->push_back("Environment::SetUp"); }
-
-  void TearDown() override { g_events->push_back("Environment::TearDown"); }
-};
-
-class ListenerTest : public Test {
- protected:
-  static void SetUpTestSuite() {
-    g_events->push_back("ListenerTest::SetUpTestSuite");
-  }
-
-  static void TearDownTestSuite() {
-    g_events->push_back("ListenerTest::TearDownTestSuite");
-  }
-
-  void SetUp() override { g_events->push_back("ListenerTest::SetUp"); }
-
-  void TearDown() override { g_events->push_back("ListenerTest::TearDown"); }
-};
-
-TEST_F(ListenerTest, DoesFoo) {
-  // Test execution order within a test case is not guaranteed so we are not
-  // recording the test name.
-  g_events->push_back("ListenerTest::* Test Body");
-  SUCCEED();  // Triggers OnTestPartResult.
-}
-
-TEST_F(ListenerTest, DoesBar) {
-  g_events->push_back("ListenerTest::* Test Body");
-  SUCCEED();  // Triggers OnTestPartResult.
-}
-
-}  // namespace internal
-
-}  // namespace testing
-
-using ::testing::internal::EnvironmentInvocationCatcher;
-using ::testing::internal::EventRecordingListener;
-using ::testing::internal::EventRecordingListener2;
-
-void VerifyResults(const std::vector<std::string>& data,
-                   const char* const* expected_data,
-                   size_t expected_data_size) {
-  const size_t actual_size = data.size();
-  // If the following assertion fails, a new entry will be appended to
-  // data.  Hence we save data.size() first.
-  EXPECT_EQ(expected_data_size, actual_size);
-
-  // Compares the common prefix.
-  const size_t shorter_size = expected_data_size <= actual_size ?
-      expected_data_size : actual_size;
-  size_t i = 0;
-  for (; i < shorter_size; ++i) {
-    ASSERT_STREQ(expected_data[i], data[i].c_str())
-        << "at position " << i;
-  }
-
-  // Prints extra elements in the actual data.
-  for (; i < actual_size; ++i) {
-    printf("  Actual event #%lu: %s\n",
-        static_cast<unsigned long>(i), data[i].c_str());
-  }
-}
-
-int main(int argc, char **argv) {
-  std::vector<std::string> events;
-  g_events = &events;
-  InitGoogleTest(&argc, argv);
-
-  UnitTest::GetInstance()->listeners().Append(
-      new EventRecordingListener("1st"));
-  UnitTest::GetInstance()->listeners().Append(
-      new EventRecordingListener("2nd"));
-  UnitTest::GetInstance()->listeners().Append(
-      new EventRecordingListener2("3rd"));
-
-  AddGlobalTestEnvironment(new EnvironmentInvocationCatcher);
-
-  GTEST_CHECK_(events.size() == 0)
-      << "AddGlobalTestEnvironment should not generate any events itself.";
-
-  ::testing::GTEST_FLAG(repeat) = 2;
-  int ret_val = RUN_ALL_TESTS();
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // The deprecated OnTestSuiteStart/OnTestCaseStart events are included
-  const char* const expected_events[] = {"1st.OnTestProgramStart",
-                                         "2nd.OnTestProgramStart",
-                                         "3rd.OnTestProgramStart",
-                                         "1st.OnTestIterationStart(0)",
-                                         "2nd.OnTestIterationStart(0)",
-                                         "3rd.OnTestIterationStart(0)",
-                                         "1st.OnEnvironmentsSetUpStart",
-                                         "2nd.OnEnvironmentsSetUpStart",
-                                         "3rd.OnEnvironmentsSetUpStart",
-                                         "Environment::SetUp",
-                                         "3rd.OnEnvironmentsSetUpEnd",
-                                         "2nd.OnEnvironmentsSetUpEnd",
-                                         "1st.OnEnvironmentsSetUpEnd",
-                                         "3rd.OnTestSuiteStart",
-                                         "1st.OnTestCaseStart",
-                                         "2nd.OnTestCaseStart",
-                                         "ListenerTest::SetUpTestSuite",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "ListenerTest::TearDownTestSuite",
-                                         "3rd.OnTestSuiteEnd",
-                                         "2nd.OnTestCaseEnd",
-                                         "1st.OnTestCaseEnd",
-                                         "1st.OnEnvironmentsTearDownStart",
-                                         "2nd.OnEnvironmentsTearDownStart",
-                                         "3rd.OnEnvironmentsTearDownStart",
-                                         "Environment::TearDown",
-                                         "3rd.OnEnvironmentsTearDownEnd",
-                                         "2nd.OnEnvironmentsTearDownEnd",
-                                         "1st.OnEnvironmentsTearDownEnd",
-                                         "3rd.OnTestIterationEnd(0)",
-                                         "2nd.OnTestIterationEnd(0)",
-                                         "1st.OnTestIterationEnd(0)",
-                                         "1st.OnTestIterationStart(1)",
-                                         "2nd.OnTestIterationStart(1)",
-                                         "3rd.OnTestIterationStart(1)",
-                                         "1st.OnEnvironmentsSetUpStart",
-                                         "2nd.OnEnvironmentsSetUpStart",
-                                         "3rd.OnEnvironmentsSetUpStart",
-                                         "Environment::SetUp",
-                                         "3rd.OnEnvironmentsSetUpEnd",
-                                         "2nd.OnEnvironmentsSetUpEnd",
-                                         "1st.OnEnvironmentsSetUpEnd",
-                                         "3rd.OnTestSuiteStart",
-                                         "1st.OnTestCaseStart",
-                                         "2nd.OnTestCaseStart",
-                                         "ListenerTest::SetUpTestSuite",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "ListenerTest::TearDownTestSuite",
-                                         "3rd.OnTestSuiteEnd",
-                                         "2nd.OnTestCaseEnd",
-                                         "1st.OnTestCaseEnd",
-                                         "1st.OnEnvironmentsTearDownStart",
-                                         "2nd.OnEnvironmentsTearDownStart",
-                                         "3rd.OnEnvironmentsTearDownStart",
-                                         "Environment::TearDown",
-                                         "3rd.OnEnvironmentsTearDownEnd",
-                                         "2nd.OnEnvironmentsTearDownEnd",
-                                         "1st.OnEnvironmentsTearDownEnd",
-                                         "3rd.OnTestIterationEnd(1)",
-                                         "2nd.OnTestIterationEnd(1)",
-                                         "1st.OnTestIterationEnd(1)",
-                                         "3rd.OnTestProgramEnd",
-                                         "2nd.OnTestProgramEnd",
-                                         "1st.OnTestProgramEnd"};
-#else
-  const char* const expected_events[] = {"1st.OnTestProgramStart",
-                                         "2nd.OnTestProgramStart",
-                                         "3rd.OnTestProgramStart",
-                                         "1st.OnTestIterationStart(0)",
-                                         "2nd.OnTestIterationStart(0)",
-                                         "3rd.OnTestIterationStart(0)",
-                                         "1st.OnEnvironmentsSetUpStart",
-                                         "2nd.OnEnvironmentsSetUpStart",
-                                         "3rd.OnEnvironmentsSetUpStart",
-                                         "Environment::SetUp",
-                                         "3rd.OnEnvironmentsSetUpEnd",
-                                         "2nd.OnEnvironmentsSetUpEnd",
-                                         "1st.OnEnvironmentsSetUpEnd",
-                                         "3rd.OnTestSuiteStart",
-                                         "ListenerTest::SetUpTestSuite",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "ListenerTest::TearDownTestSuite",
-                                         "3rd.OnTestSuiteEnd",
-                                         "1st.OnEnvironmentsTearDownStart",
-                                         "2nd.OnEnvironmentsTearDownStart",
-                                         "3rd.OnEnvironmentsTearDownStart",
-                                         "Environment::TearDown",
-                                         "3rd.OnEnvironmentsTearDownEnd",
-                                         "2nd.OnEnvironmentsTearDownEnd",
-                                         "1st.OnEnvironmentsTearDownEnd",
-                                         "3rd.OnTestIterationEnd(0)",
-                                         "2nd.OnTestIterationEnd(0)",
-                                         "1st.OnTestIterationEnd(0)",
-                                         "1st.OnTestIterationStart(1)",
-                                         "2nd.OnTestIterationStart(1)",
-                                         "3rd.OnTestIterationStart(1)",
-                                         "1st.OnEnvironmentsSetUpStart",
-                                         "2nd.OnEnvironmentsSetUpStart",
-                                         "3rd.OnEnvironmentsSetUpStart",
-                                         "Environment::SetUp",
-                                         "3rd.OnEnvironmentsSetUpEnd",
-                                         "2nd.OnEnvironmentsSetUpEnd",
-                                         "1st.OnEnvironmentsSetUpEnd",
-                                         "3rd.OnTestSuiteStart",
-                                         "ListenerTest::SetUpTestSuite",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "ListenerTest::TearDownTestSuite",
-                                         "3rd.OnTestSuiteEnd",
-                                         "1st.OnEnvironmentsTearDownStart",
-                                         "2nd.OnEnvironmentsTearDownStart",
-                                         "3rd.OnEnvironmentsTearDownStart",
-                                         "Environment::TearDown",
-                                         "3rd.OnEnvironmentsTearDownEnd",
-                                         "2nd.OnEnvironmentsTearDownEnd",
-                                         "1st.OnEnvironmentsTearDownEnd",
-                                         "3rd.OnTestIterationEnd(1)",
-                                         "2nd.OnTestIterationEnd(1)",
-                                         "1st.OnTestIterationEnd(1)",
-                                         "3rd.OnTestProgramEnd",
-                                         "2nd.OnTestProgramEnd",
-                                         "1st.OnTestProgramEnd"};
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  VerifyResults(events,
-                expected_events,
-                sizeof(expected_events)/sizeof(expected_events[0]));
-
-  // We need to check manually for ad hoc test failures that happen after
-  // RUN_ALL_TESTS finishes.
-  if (UnitTest::GetInstance()->Failed())
-    ret_val = 1;
-
-  return ret_val;
-}
diff --git a/3rdparty/gtest/test/googletest-message-test.cc b/3rdparty/gtest/test/googletest-message-test.cc
deleted file mode 100644
index 962d5191..00000000
--- a/3rdparty/gtest/test/googletest-message-test.cc
+++ /dev/null
@@ -1,158 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for the Message class.
-
-#include "gtest/gtest-message.h"
-
-#include "gtest/gtest.h"
-
-namespace {
-
-using ::testing::Message;
-
-// Tests the testing::Message class
-
-// Tests the default constructor.
-TEST(MessageTest, DefaultConstructor) {
-  const Message msg;
-  EXPECT_EQ("", msg.GetString());
-}
-
-// Tests the copy constructor.
-TEST(MessageTest, CopyConstructor) {
-  const Message msg1("Hello");
-  const Message msg2(msg1);
-  EXPECT_EQ("Hello", msg2.GetString());
-}
-
-// Tests constructing a Message from a C-string.
-TEST(MessageTest, ConstructsFromCString) {
-  Message msg("Hello");
-  EXPECT_EQ("Hello", msg.GetString());
-}
-
-// Tests streaming a float.
-TEST(MessageTest, StreamsFloat) {
-  const std::string s = (Message() << 1.23456F << " " << 2.34567F).GetString();
-  // Both numbers should be printed with enough precision.
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "1.234560", s.c_str());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, " 2.345669", s.c_str());
-}
-
-// Tests streaming a double.
-TEST(MessageTest, StreamsDouble) {
-  const std::string s = (Message() << 1260570880.4555497 << " "
-                                  << 1260572265.1954534).GetString();
-  // Both numbers should be printed with enough precision.
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "1260570880.45", s.c_str());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, " 1260572265.19", s.c_str());
-}
-
-// Tests streaming a non-char pointer.
-TEST(MessageTest, StreamsPointer) {
-  int n = 0;
-  int* p = &n;
-  EXPECT_NE("(null)", (Message() << p).GetString());
-}
-
-// Tests streaming a NULL non-char pointer.
-TEST(MessageTest, StreamsNullPointer) {
-  int* p = nullptr;
-  EXPECT_EQ("(null)", (Message() << p).GetString());
-}
-
-// Tests streaming a C string.
-TEST(MessageTest, StreamsCString) {
-  EXPECT_EQ("Foo", (Message() << "Foo").GetString());
-}
-
-// Tests streaming a NULL C string.
-TEST(MessageTest, StreamsNullCString) {
-  char* p = nullptr;
-  EXPECT_EQ("(null)", (Message() << p).GetString());
-}
-
-// Tests streaming std::string.
-TEST(MessageTest, StreamsString) {
-  const ::std::string str("Hello");
-  EXPECT_EQ("Hello", (Message() << str).GetString());
-}
-
-// Tests that we can output strings containing embedded NULs.
-TEST(MessageTest, StreamsStringWithEmbeddedNUL) {
-  const char char_array_with_nul[] =
-      "Here's a NUL\0 and some more string";
-  const ::std::string string_with_nul(char_array_with_nul,
-                                      sizeof(char_array_with_nul) - 1);
-  EXPECT_EQ("Here's a NUL\\0 and some more string",
-            (Message() << string_with_nul).GetString());
-}
-
-// Tests streaming a NUL char.
-TEST(MessageTest, StreamsNULChar) {
-  EXPECT_EQ("\\0", (Message() << '\0').GetString());
-}
-
-// Tests streaming int.
-TEST(MessageTest, StreamsInt) {
-  EXPECT_EQ("123", (Message() << 123).GetString());
-}
-
-// Tests that basic IO manipulators (endl, ends, and flush) can be
-// streamed to Message.
-TEST(MessageTest, StreamsBasicIoManip) {
-  EXPECT_EQ("Line 1.\nA NUL char \\0 in line 2.",
-               (Message() << "Line 1." << std::endl
-                         << "A NUL char " << std::ends << std::flush
-                         << " in line 2.").GetString());
-}
-
-// Tests Message::GetString()
-TEST(MessageTest, GetString) {
-  Message msg;
-  msg << 1 << " lamb";
-  EXPECT_EQ("1 lamb", msg.GetString());
-}
-
-// Tests streaming a Message object to an ostream.
-TEST(MessageTest, StreamsToOStream) {
-  Message msg("Hello");
-  ::std::stringstream ss;
-  ss << msg;
-  EXPECT_EQ("Hello", testing::internal::StringStreamToString(&ss));
-}
-
-// Tests that a Message object doesn't take up too much stack space.
-TEST(MessageTest, DoesNotTakeUpMuchStackSpace) {
-  EXPECT_LE(sizeof(Message), 16U);
-}
-
-}  // namespace
diff --git a/3rdparty/gtest/test/googletest-options-test.cc b/3rdparty/gtest/test/googletest-options-test.cc
deleted file mode 100644
index f07b316d..00000000
--- a/3rdparty/gtest/test/googletest-options-test.cc
+++ /dev/null
@@ -1,216 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Google Test UnitTestOptions tests
-//
-// This file tests classes and functions used internally by
-// Google Test.  They are subject to change without notice.
-//
-// This file is #included from gtest.cc, to avoid changing build or
-// make-files on Windows and other platforms. Do not #include this file
-// anywhere else!
-
-#include "gtest/gtest.h"
-
-#if GTEST_OS_WINDOWS_MOBILE
-# include <windows.h>
-#elif GTEST_OS_WINDOWS
-# include <direct.h>
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-namespace internal {
-namespace {
-
-// Turns the given relative path into an absolute path.
-FilePath GetAbsolutePathOf(const FilePath& relative_path) {
-  return FilePath::ConcatPaths(FilePath::GetCurrentDir(), relative_path);
-}
-
-// Testing UnitTestOptions::GetOutputFormat/GetOutputFile.
-
-TEST(XmlOutputTest, GetOutputFormatDefault) {
-  GTEST_FLAG(output) = "";
-  EXPECT_STREQ("", UnitTestOptions::GetOutputFormat().c_str());
-}
-
-TEST(XmlOutputTest, GetOutputFormat) {
-  GTEST_FLAG(output) = "xml:filename";
-  EXPECT_STREQ("xml", UnitTestOptions::GetOutputFormat().c_str());
-}
-
-TEST(XmlOutputTest, GetOutputFileDefault) {
-  GTEST_FLAG(output) = "";
-  EXPECT_EQ(GetAbsolutePathOf(FilePath("test_detail.xml")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST(XmlOutputTest, GetOutputFileSingleFile) {
-  GTEST_FLAG(output) = "xml:filename.abc";
-  EXPECT_EQ(GetAbsolutePathOf(FilePath("filename.abc")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST(XmlOutputTest, GetOutputFileFromDirectoryPath) {
-  GTEST_FLAG(output) = "xml:path" GTEST_PATH_SEP_;
-  const std::string expected_output_file =
-      GetAbsolutePathOf(
-          FilePath(std::string("path") + GTEST_PATH_SEP_ +
-                   GetCurrentExecutableName().string() + ".xml")).string();
-  const std::string& output_file =
-      UnitTestOptions::GetAbsolutePathToOutputFile();
-#if GTEST_OS_WINDOWS
-  EXPECT_STRCASEEQ(expected_output_file.c_str(), output_file.c_str());
-#else
-  EXPECT_EQ(expected_output_file, output_file.c_str());
-#endif
-}
-
-TEST(OutputFileHelpersTest, GetCurrentExecutableName) {
-  const std::string exe_str = GetCurrentExecutableName().string();
-#if GTEST_OS_WINDOWS
-  const bool success =
-      _strcmpi("googletest-options-test", exe_str.c_str()) == 0 ||
-      _strcmpi("gtest-options-ex_test", exe_str.c_str()) == 0 ||
-      _strcmpi("gtest_all_test", exe_str.c_str()) == 0 ||
-      _strcmpi("gtest_dll_test", exe_str.c_str()) == 0;
-#elif GTEST_OS_OS2
-  const bool success =
-      strcasecmp("googletest-options-test", exe_str.c_str()) == 0 ||
-      strcasecmp("gtest-options-ex_test", exe_str.c_str()) == 0 ||
-      strcasecmp("gtest_all_test", exe_str.c_str()) == 0 ||
-      strcasecmp("gtest_dll_test", exe_str.c_str()) == 0;
-#elif GTEST_OS_FUCHSIA
-  const bool success = exe_str == "app";
-#else
-  const bool success =
-      exe_str == "googletest-options-test" ||
-      exe_str == "gtest_all_test" ||
-      exe_str == "lt-gtest_all_test" ||
-      exe_str == "gtest_dll_test";
-#endif  // GTEST_OS_WINDOWS
-  if (!success)
-    FAIL() << "GetCurrentExecutableName() returns " << exe_str;
-}
-
-#if !GTEST_OS_FUCHSIA
-
-class XmlOutputChangeDirTest : public Test {
- protected:
-  void SetUp() override {
-    original_working_dir_ = FilePath::GetCurrentDir();
-    posix::ChDir("..");
-    // This will make the test fail if run from the root directory.
-    EXPECT_NE(original_working_dir_.string(),
-              FilePath::GetCurrentDir().string());
-  }
-
-  void TearDown() override {
-    posix::ChDir(original_working_dir_.string().c_str());
-  }
-
-  FilePath original_working_dir_;
-};
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithDefault) {
-  GTEST_FLAG(output) = "";
-  EXPECT_EQ(FilePath::ConcatPaths(original_working_dir_,
-                                  FilePath("test_detail.xml")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithDefaultXML) {
-  GTEST_FLAG(output) = "xml";
-  EXPECT_EQ(FilePath::ConcatPaths(original_working_dir_,
-                                  FilePath("test_detail.xml")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithRelativeFile) {
-  GTEST_FLAG(output) = "xml:filename.abc";
-  EXPECT_EQ(FilePath::ConcatPaths(original_working_dir_,
-                                  FilePath("filename.abc")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithRelativePath) {
-  GTEST_FLAG(output) = "xml:path" GTEST_PATH_SEP_;
-  const std::string expected_output_file =
-      FilePath::ConcatPaths(
-          original_working_dir_,
-          FilePath(std::string("path") + GTEST_PATH_SEP_ +
-                   GetCurrentExecutableName().string() + ".xml")).string();
-  const std::string& output_file =
-      UnitTestOptions::GetAbsolutePathToOutputFile();
-#if GTEST_OS_WINDOWS
-  EXPECT_STRCASEEQ(expected_output_file.c_str(), output_file.c_str());
-#else
-  EXPECT_EQ(expected_output_file, output_file.c_str());
-#endif
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithAbsoluteFile) {
-#if GTEST_OS_WINDOWS
-  GTEST_FLAG(output) = "xml:c:\\tmp\\filename.abc";
-  EXPECT_EQ(FilePath("c:\\tmp\\filename.abc").string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-#else
-  GTEST_FLAG(output) ="xml:/tmp/filename.abc";
-  EXPECT_EQ(FilePath("/tmp/filename.abc").string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-#endif
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithAbsolutePath) {
-#if GTEST_OS_WINDOWS
-  const std::string path = "c:\\tmp\\";
-#else
-  const std::string path = "/tmp/";
-#endif
-
-  GTEST_FLAG(output) = "xml:" + path;
-  const std::string expected_output_file =
-      path + GetCurrentExecutableName().string() + ".xml";
-  const std::string& output_file =
-      UnitTestOptions::GetAbsolutePathToOutputFile();
-
-#if GTEST_OS_WINDOWS
-  EXPECT_STRCASEEQ(expected_output_file.c_str(), output_file.c_str());
-#else
-  EXPECT_EQ(expected_output_file, output_file.c_str());
-#endif
-}
-
-#endif  // !GTEST_OS_FUCHSIA
-
-}  // namespace
-}  // namespace internal
-}  // namespace testing
diff --git a/3rdparty/gtest/test/googletest-output-test-golden-lin.txt b/3rdparty/gtest/test/googletest-output-test-golden-lin.txt
deleted file mode 100644
index 038de921..00000000
--- a/3rdparty/gtest/test/googletest-output-test-golden-lin.txt
+++ /dev/null
@@ -1,1140 +0,0 @@
-The non-test part of the code is expected to have 2 failures.
-
-googletest-output-test_.cc:#: Failure
-Value of: false
-  Actual: false
-Expected: true
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  2
-  3
-Stack trace: (omitted)
-
-[==========] Running 85 tests from 40 test suites.
-[----------] Global test environment set-up.
-FooEnvironment::SetUp() called.
-BarEnvironment::SetUp() called.
-[----------] 1 test from ADeathTest
-[ RUN      ] ADeathTest.ShouldRunFirst
-[       OK ] ADeathTest.ShouldRunFirst
-[----------] 1 test from ATypedDeathTest/0, where TypeParam = int
-[ RUN      ] ATypedDeathTest/0.ShouldRunFirst
-[       OK ] ATypedDeathTest/0.ShouldRunFirst
-[----------] 1 test from ATypedDeathTest/1, where TypeParam = double
-[ RUN      ] ATypedDeathTest/1.ShouldRunFirst
-[       OK ] ATypedDeathTest/1.ShouldRunFirst
-[----------] 1 test from My/ATypeParamDeathTest/0, where TypeParam = int
-[ RUN      ] My/ATypeParamDeathTest/0.ShouldRunFirst
-[       OK ] My/ATypeParamDeathTest/0.ShouldRunFirst
-[----------] 1 test from My/ATypeParamDeathTest/1, where TypeParam = double
-[ RUN      ] My/ATypeParamDeathTest/1.ShouldRunFirst
-[       OK ] My/ATypeParamDeathTest/1.ShouldRunFirst
-[----------] 2 tests from PassingTest
-[ RUN      ] PassingTest.PassingTest1
-[       OK ] PassingTest.PassingTest1
-[ RUN      ] PassingTest.PassingTest2
-[       OK ] PassingTest.PassingTest2
-[----------] 2 tests from NonfatalFailureTest
-[ RUN      ] NonfatalFailureTest.EscapesStringOperands
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  kGoldenString
-    Which is: "\"Line"
-  actual
-    Which is: "actual \"string\""
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  golden
-    Which is: "\"Line"
-  actual
-    Which is: "actual \"string\""
-Stack trace: (omitted)
-
-[  FAILED  ] NonfatalFailureTest.EscapesStringOperands
-[ RUN      ] NonfatalFailureTest.DiffForLongStrings
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  golden_str
-    Which is: "\"Line\0 1\"\nLine 2"
-  "Line 2"
-With diff:
-@@ -1,2 @@
--\"Line\0 1\"
- Line 2
-
-Stack trace: (omitted)
-
-[  FAILED  ] NonfatalFailureTest.DiffForLongStrings
-[----------] 3 tests from FatalFailureTest
-[ RUN      ] FatalFailureTest.FatalFailureInSubroutine
-(expecting a failure that x should be 1)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  x
-    Which is: 2
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.FatalFailureInSubroutine
-[ RUN      ] FatalFailureTest.FatalFailureInNestedSubroutine
-(expecting a failure that x should be 1)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  x
-    Which is: 2
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.FatalFailureInNestedSubroutine
-[ RUN      ] FatalFailureTest.NonfatalFailureInSubroutine
-(expecting a failure on false)
-googletest-output-test_.cc:#: Failure
-Value of: false
-  Actual: false
-Expected: true
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.NonfatalFailureInSubroutine
-[----------] 1 test from LoggingTest
-[ RUN      ] LoggingTest.InterleavingLoggingAndAssertions
-(expecting 2 failures on (3) >= (a[i]))
-i == 0
-i == 1
-googletest-output-test_.cc:#: Failure
-Expected: (3) >= (a[i]), actual: 3 vs 9
-Stack trace: (omitted)
-
-i == 2
-i == 3
-googletest-output-test_.cc:#: Failure
-Expected: (3) >= (a[i]), actual: 3 vs 6
-Stack trace: (omitted)
-
-[  FAILED  ] LoggingTest.InterleavingLoggingAndAssertions
-[----------] 7 tests from SCOPED_TRACETest
-[ RUN      ] SCOPED_TRACETest.AcceptedValues
-googletest-output-test_.cc:#: Failure
-Failed
-Just checking that all these values work fine.
-Google Test trace:
-googletest-output-test_.cc:#: (null)
-googletest-output-test_.cc:#: 1337
-googletest-output-test_.cc:#: std::string
-googletest-output-test_.cc:#: literal string
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.AcceptedValues
-[ RUN      ] SCOPED_TRACETest.ObeysScopes
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and shouldn't have a trace.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should have a trace.
-Google Test trace:
-googletest-output-test_.cc:#: Expected trace
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and shouldn't have a trace.
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.ObeysScopes
-[ RUN      ] SCOPED_TRACETest.WorksInLoop
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  2
-  n
-    Which is: 1
-Google Test trace:
-googletest-output-test_.cc:#: i = 1
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  n
-    Which is: 2
-Google Test trace:
-googletest-output-test_.cc:#: i = 2
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.WorksInLoop
-[ RUN      ] SCOPED_TRACETest.WorksInSubroutine
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  2
-  n
-    Which is: 1
-Google Test trace:
-googletest-output-test_.cc:#: n = 1
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  n
-    Which is: 2
-Google Test trace:
-googletest-output-test_.cc:#: n = 2
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.WorksInSubroutine
-[ RUN      ] SCOPED_TRACETest.CanBeNested
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  n
-    Which is: 2
-Google Test trace:
-googletest-output-test_.cc:#: n = 2
-googletest-output-test_.cc:#: 
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.CanBeNested
-[ RUN      ] SCOPED_TRACETest.CanBeRepeated
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should contain trace point A.
-Google Test trace:
-googletest-output-test_.cc:#: A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should contain trace point A and B.
-Google Test trace:
-googletest-output-test_.cc:#: B
-googletest-output-test_.cc:#: A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should contain trace point A, B, and C.
-Google Test trace:
-googletest-output-test_.cc:#: C
-googletest-output-test_.cc:#: B
-googletest-output-test_.cc:#: A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should contain trace point A, B, and D.
-Google Test trace:
-googletest-output-test_.cc:#: D
-googletest-output-test_.cc:#: B
-googletest-output-test_.cc:#: A
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.CanBeRepeated
-[ RUN      ] SCOPED_TRACETest.WorksConcurrently
-(expecting 6 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1 (in thread B, only trace B alive).
-Google Test trace:
-googletest-output-test_.cc:#: Trace B
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2 (in thread A, trace A & B both alive).
-Google Test trace:
-googletest-output-test_.cc:#: Trace A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #3 (in thread B, trace A & B both alive).
-Google Test trace:
-googletest-output-test_.cc:#: Trace B
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #4 (in thread B, only trace A alive).
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #5 (in thread A, only trace A alive).
-Google Test trace:
-googletest-output-test_.cc:#: Trace A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #6 (in thread A, no trace alive).
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.WorksConcurrently
-[----------] 1 test from ScopedTraceTest
-[ RUN      ] ScopedTraceTest.WithExplicitFileAndLine
-googletest-output-test_.cc:#: Failure
-Failed
-Check that the trace is attached to a particular location.
-Google Test trace:
-explicit_file.cc:123: expected trace message
-Stack trace: (omitted)
-
-[  FAILED  ] ScopedTraceTest.WithExplicitFileAndLine
-[----------] 1 test from NonFatalFailureInFixtureConstructorTest
-[ RUN      ] NonFatalFailureInFixtureConstructorTest.FailureInConstructor
-(expecting 5 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1, in the test fixture c'tor.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2, in SetUp().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #3, in the test body.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #4, in TearDown.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #5, in the test fixture d'tor.
-Stack trace: (omitted)
-
-[  FAILED  ] NonFatalFailureInFixtureConstructorTest.FailureInConstructor
-[----------] 1 test from FatalFailureInFixtureConstructorTest
-[ RUN      ] FatalFailureInFixtureConstructorTest.FailureInConstructor
-(expecting 2 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1, in the test fixture c'tor.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2, in the test fixture d'tor.
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureInFixtureConstructorTest.FailureInConstructor
-[----------] 1 test from NonFatalFailureInSetUpTest
-[ RUN      ] NonFatalFailureInSetUpTest.FailureInSetUp
-(expecting 4 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1, in SetUp().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2, in the test function.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #3, in TearDown().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #4, in the test fixture d'tor.
-Stack trace: (omitted)
-
-[  FAILED  ] NonFatalFailureInSetUpTest.FailureInSetUp
-[----------] 1 test from FatalFailureInSetUpTest
-[ RUN      ] FatalFailureInSetUpTest.FailureInSetUp
-(expecting 3 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1, in SetUp().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2, in TearDown().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #3, in the test fixture d'tor.
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureInSetUpTest.FailureInSetUp
-[----------] 1 test from AddFailureAtTest
-[ RUN      ] AddFailureAtTest.MessageContainsSpecifiedFileAndLineNumber
-foo.cc:42: Failure
-Failed
-Expected nonfatal failure in foo.cc
-Stack trace: (omitted)
-
-[  FAILED  ] AddFailureAtTest.MessageContainsSpecifiedFileAndLineNumber
-[----------] 1 test from GtestFailAtTest
-[ RUN      ] GtestFailAtTest.MessageContainsSpecifiedFileAndLineNumber
-foo.cc:42: Failure
-Failed
-Expected fatal failure in foo.cc
-Stack trace: (omitted)
-
-[  FAILED  ] GtestFailAtTest.MessageContainsSpecifiedFileAndLineNumber
-[----------] 4 tests from MixedUpTestSuiteTest
-[ RUN      ] MixedUpTestSuiteTest.FirstTestFromNamespaceFoo
-[       OK ] MixedUpTestSuiteTest.FirstTestFromNamespaceFoo
-[ RUN      ] MixedUpTestSuiteTest.SecondTestFromNamespaceFoo
-[       OK ] MixedUpTestSuiteTest.SecondTestFromNamespaceFoo
-[ RUN      ] MixedUpTestSuiteTest.ThisShouldFail
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class.  However, in test suite MixedUpTestSuiteTest,
-you defined test FirstTestFromNamespaceFoo and test ThisShouldFail
-using two different test fixture classes.  This can happen if
-the two classes are from different namespaces or translation
-units and have the same name.  You should probably rename one
-of the classes to put the tests into different test suites.
-Stack trace: (omitted)
-
-[  FAILED  ] MixedUpTestSuiteTest.ThisShouldFail
-[ RUN      ] MixedUpTestSuiteTest.ThisShouldFailToo
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class.  However, in test suite MixedUpTestSuiteTest,
-you defined test FirstTestFromNamespaceFoo and test ThisShouldFailToo
-using two different test fixture classes.  This can happen if
-the two classes are from different namespaces or translation
-units and have the same name.  You should probably rename one
-of the classes to put the tests into different test suites.
-Stack trace: (omitted)
-
-[  FAILED  ] MixedUpTestSuiteTest.ThisShouldFailToo
-[----------] 2 tests from MixedUpTestSuiteWithSameTestNameTest
-[ RUN      ] MixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-[       OK ] MixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-[ RUN      ] MixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class.  However, in test suite MixedUpTestSuiteWithSameTestNameTest,
-you defined test TheSecondTestWithThisNameShouldFail and test TheSecondTestWithThisNameShouldFail
-using two different test fixture classes.  This can happen if
-the two classes are from different namespaces or translation
-units and have the same name.  You should probably rename one
-of the classes to put the tests into different test suites.
-Stack trace: (omitted)
-
-[  FAILED  ] MixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-[----------] 2 tests from TEST_F_before_TEST_in_same_test_case
-[ RUN      ] TEST_F_before_TEST_in_same_test_case.DefinedUsingTEST_F
-[       OK ] TEST_F_before_TEST_in_same_test_case.DefinedUsingTEST_F
-[ RUN      ] TEST_F_before_TEST_in_same_test_case.DefinedUsingTESTAndShouldFail
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class, so mixing TEST_F and TEST in the same test suite is
-illegal.  In test suite TEST_F_before_TEST_in_same_test_case,
-test DefinedUsingTEST_F is defined using TEST_F but
-test DefinedUsingTESTAndShouldFail is defined using TEST.  You probably
-want to change the TEST to TEST_F or move it to another test
-case.
-Stack trace: (omitted)
-
-[  FAILED  ] TEST_F_before_TEST_in_same_test_case.DefinedUsingTESTAndShouldFail
-[----------] 2 tests from TEST_before_TEST_F_in_same_test_case
-[ RUN      ] TEST_before_TEST_F_in_same_test_case.DefinedUsingTEST
-[       OK ] TEST_before_TEST_F_in_same_test_case.DefinedUsingTEST
-[ RUN      ] TEST_before_TEST_F_in_same_test_case.DefinedUsingTEST_FAndShouldFail
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class, so mixing TEST_F and TEST in the same test suite is
-illegal.  In test suite TEST_before_TEST_F_in_same_test_case,
-test DefinedUsingTEST_FAndShouldFail is defined using TEST_F but
-test DefinedUsingTEST is defined using TEST.  You probably
-want to change the TEST to TEST_F or move it to another test
-case.
-Stack trace: (omitted)
-
-[  FAILED  ] TEST_before_TEST_F_in_same_test_case.DefinedUsingTEST_FAndShouldFail
-[----------] 8 tests from ExpectNonfatalFailureTest
-[ RUN      ] ExpectNonfatalFailureTest.CanReferenceGlobalVariables
-[       OK ] ExpectNonfatalFailureTest.CanReferenceGlobalVariables
-[ RUN      ] ExpectNonfatalFailureTest.CanReferenceLocalVariables
-[       OK ] ExpectNonfatalFailureTest.CanReferenceLocalVariables
-[ RUN      ] ExpectNonfatalFailureTest.SucceedsWhenThereIsOneNonfatalFailure
-[       OK ] ExpectNonfatalFailureTest.SucceedsWhenThereIsOneNonfatalFailure
-[ RUN      ] ExpectNonfatalFailureTest.FailsWhenThereIsNoNonfatalFailure
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenThereIsNoNonfatalFailure
-[ RUN      ] ExpectNonfatalFailureTest.FailsWhenThereAreTwoNonfatalFailures
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 2 failures
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure 1.
-Stack trace: (omitted)
-
-
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure 2.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenThereAreTwoNonfatalFailures
-[ RUN      ] ExpectNonfatalFailureTest.FailsWhenThereIsOneFatalFailure
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenThereIsOneFatalFailure
-[ RUN      ] ExpectNonfatalFailureTest.FailsWhenStatementReturns
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenStatementReturns
-[ RUN      ] ExpectNonfatalFailureTest.FailsWhenStatementThrows
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenStatementThrows
-[----------] 8 tests from ExpectFatalFailureTest
-[ RUN      ] ExpectFatalFailureTest.CanReferenceGlobalVariables
-[       OK ] ExpectFatalFailureTest.CanReferenceGlobalVariables
-[ RUN      ] ExpectFatalFailureTest.CanReferenceLocalStaticVariables
-[       OK ] ExpectFatalFailureTest.CanReferenceLocalStaticVariables
-[ RUN      ] ExpectFatalFailureTest.SucceedsWhenThereIsOneFatalFailure
-[       OK ] ExpectFatalFailureTest.SucceedsWhenThereIsOneFatalFailure
-[ RUN      ] ExpectFatalFailureTest.FailsWhenThereIsNoFatalFailure
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenThereIsNoFatalFailure
-[ RUN      ] ExpectFatalFailureTest.FailsWhenThereAreTwoFatalFailures
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 2 failures
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenThereAreTwoFatalFailures
-[ RUN      ] ExpectFatalFailureTest.FailsWhenThereIsOneNonfatalFailure
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenThereIsOneNonfatalFailure
-[ RUN      ] ExpectFatalFailureTest.FailsWhenStatementReturns
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenStatementReturns
-[ RUN      ] ExpectFatalFailureTest.FailsWhenStatementThrows
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenStatementThrows
-[----------] 2 tests from TypedTest/0, where TypeParam = int
-[ RUN      ] TypedTest/0.Success
-[       OK ] TypedTest/0.Success
-[ RUN      ] TypedTest/0.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  TypeParam()
-    Which is: 0
-Expected failure
-Stack trace: (omitted)
-
-[  FAILED  ] TypedTest/0.Failure, where TypeParam = int
-[----------] 2 tests from TypedTestWithNames/char0, where TypeParam = char
-[ RUN      ] TypedTestWithNames/char0.Success
-[       OK ] TypedTestWithNames/char0.Success
-[ RUN      ] TypedTestWithNames/char0.Failure
-googletest-output-test_.cc:#: Failure
-Failed
-Stack trace: (omitted)
-
-[  FAILED  ] TypedTestWithNames/char0.Failure, where TypeParam = char
-[----------] 2 tests from TypedTestWithNames/int1, where TypeParam = int
-[ RUN      ] TypedTestWithNames/int1.Success
-[       OK ] TypedTestWithNames/int1.Success
-[ RUN      ] TypedTestWithNames/int1.Failure
-googletest-output-test_.cc:#: Failure
-Failed
-Stack trace: (omitted)
-
-[  FAILED  ] TypedTestWithNames/int1.Failure, where TypeParam = int
-[----------] 2 tests from Unsigned/TypedTestP/0, where TypeParam = unsigned char
-[ RUN      ] Unsigned/TypedTestP/0.Success
-[       OK ] Unsigned/TypedTestP/0.Success
-[ RUN      ] Unsigned/TypedTestP/0.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1U
-    Which is: 1
-  TypeParam()
-    Which is: '\0'
-Expected failure
-Stack trace: (omitted)
-
-[  FAILED  ] Unsigned/TypedTestP/0.Failure, where TypeParam = unsigned char
-[----------] 2 tests from Unsigned/TypedTestP/1, where TypeParam = unsigned int
-[ RUN      ] Unsigned/TypedTestP/1.Success
-[       OK ] Unsigned/TypedTestP/1.Success
-[ RUN      ] Unsigned/TypedTestP/1.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1U
-    Which is: 1
-  TypeParam()
-    Which is: 0
-Expected failure
-Stack trace: (omitted)
-
-[  FAILED  ] Unsigned/TypedTestP/1.Failure, where TypeParam = unsigned int
-[----------] 2 tests from UnsignedCustomName/TypedTestP/unsignedChar0, where TypeParam = unsigned char
-[ RUN      ] UnsignedCustomName/TypedTestP/unsignedChar0.Success
-[       OK ] UnsignedCustomName/TypedTestP/unsignedChar0.Success
-[ RUN      ] UnsignedCustomName/TypedTestP/unsignedChar0.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1U
-    Which is: 1
-  TypeParam()
-    Which is: '\0'
-Expected failure
-Stack trace: (omitted)
-
-[  FAILED  ] UnsignedCustomName/TypedTestP/unsignedChar0.Failure, where TypeParam = unsigned char
-[----------] 2 tests from UnsignedCustomName/TypedTestP/unsignedInt1, where TypeParam = unsigned int
-[ RUN      ] UnsignedCustomName/TypedTestP/unsignedInt1.Success
-[       OK ] UnsignedCustomName/TypedTestP/unsignedInt1.Success
-[ RUN      ] UnsignedCustomName/TypedTestP/unsignedInt1.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1U
-    Which is: 1
-  TypeParam()
-    Which is: 0
-Expected failure
-Stack trace: (omitted)
-
-[  FAILED  ] UnsignedCustomName/TypedTestP/unsignedInt1.Failure, where TypeParam = unsigned int
-[----------] 4 tests from ExpectFailureTest
-[ RUN      ] ExpectFailureTest.ExpectFatalFailure
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Success:
-Succeeded
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure containing "Some other fatal failure expected."
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFailureTest.ExpectFatalFailure
-[ RUN      ] ExpectFailureTest.ExpectNonFatalFailure
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Success:
-Succeeded
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure containing "Some other non-fatal failure."
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFailureTest.ExpectNonFatalFailure
-[ RUN      ] ExpectFailureTest.ExpectFatalFailureOnAllThreads
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Success:
-Succeeded
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure containing "Some other fatal failure expected."
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFailureTest.ExpectFatalFailureOnAllThreads
-[ RUN      ] ExpectFailureTest.ExpectNonFatalFailureOnAllThreads
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Success:
-Succeeded
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure containing "Some other non-fatal failure."
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFailureTest.ExpectNonFatalFailureOnAllThreads
-[----------] 2 tests from ExpectFailureWithThreadsTest
-[ RUN      ] ExpectFailureWithThreadsTest.ExpectFatalFailure
-(expecting 2 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFailureWithThreadsTest.ExpectFatalFailure
-[ RUN      ] ExpectFailureWithThreadsTest.ExpectNonFatalFailure
-(expecting 2 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFailureWithThreadsTest.ExpectNonFatalFailure
-[----------] 1 test from ScopedFakeTestPartResultReporterTest
-[ RUN      ] ScopedFakeTestPartResultReporterTest.InterceptOnlyCurrentThread
-(expecting 2 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-[  FAILED  ] ScopedFakeTestPartResultReporterTest.InterceptOnlyCurrentThread
-[----------] 2 tests from DynamicFixture
-DynamicFixture::SetUpTestSuite
-[ RUN      ] DynamicFixture.DynamicTestPass
-DynamicFixture()
-DynamicFixture::SetUp
-DynamicFixture::TearDown
-~DynamicFixture()
-[       OK ] DynamicFixture.DynamicTestPass
-[ RUN      ] DynamicFixture.DynamicTestFail
-DynamicFixture()
-DynamicFixture::SetUp
-googletest-output-test_.cc:#: Failure
-Value of: Pass
-  Actual: false
-Expected: true
-Stack trace: (omitted)
-
-DynamicFixture::TearDown
-~DynamicFixture()
-[  FAILED  ] DynamicFixture.DynamicTestFail
-DynamicFixture::TearDownTestSuite
-[----------] 1 test from DynamicFixtureAnotherName
-DynamicFixture::SetUpTestSuite
-[ RUN      ] DynamicFixtureAnotherName.DynamicTestPass
-DynamicFixture()
-DynamicFixture::SetUp
-DynamicFixture::TearDown
-~DynamicFixture()
-[       OK ] DynamicFixtureAnotherName.DynamicTestPass
-DynamicFixture::TearDownTestSuite
-[----------] 2 tests from BadDynamicFixture1
-DynamicFixture::SetUpTestSuite
-[ RUN      ] BadDynamicFixture1.FixtureBase
-DynamicFixture()
-DynamicFixture::SetUp
-DynamicFixture::TearDown
-~DynamicFixture()
-[       OK ] BadDynamicFixture1.FixtureBase
-[ RUN      ] BadDynamicFixture1.TestBase
-DynamicFixture()
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class, so mixing TEST_F and TEST in the same test suite is
-illegal.  In test suite BadDynamicFixture1,
-test FixtureBase is defined using TEST_F but
-test TestBase is defined using TEST.  You probably
-want to change the TEST to TEST_F or move it to another test
-case.
-Stack trace: (omitted)
-
-~DynamicFixture()
-[  FAILED  ] BadDynamicFixture1.TestBase
-DynamicFixture::TearDownTestSuite
-[----------] 2 tests from BadDynamicFixture2
-DynamicFixture::SetUpTestSuite
-[ RUN      ] BadDynamicFixture2.FixtureBase
-DynamicFixture()
-DynamicFixture::SetUp
-DynamicFixture::TearDown
-~DynamicFixture()
-[       OK ] BadDynamicFixture2.FixtureBase
-[ RUN      ] BadDynamicFixture2.Derived
-DynamicFixture()
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class.  However, in test suite BadDynamicFixture2,
-you defined test FixtureBase and test Derived
-using two different test fixture classes.  This can happen if
-the two classes are from different namespaces or translation
-units and have the same name.  You should probably rename one
-of the classes to put the tests into different test suites.
-Stack trace: (omitted)
-
-~DynamicFixture()
-[  FAILED  ] BadDynamicFixture2.Derived
-DynamicFixture::TearDownTestSuite
-[----------] 1 test from PrintingFailingParams/FailingParamTest
-[ RUN      ] PrintingFailingParams/FailingParamTest.Fails/0
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  GetParam()
-    Which is: 2
-Stack trace: (omitted)
-
-[  FAILED  ] PrintingFailingParams/FailingParamTest.Fails/0, where GetParam() = 2
-[----------] 1 test from EmptyBasenameParamInst
-[ RUN      ] EmptyBasenameParamInst.Passes/0
-[       OK ] EmptyBasenameParamInst.Passes/0
-[----------] 2 tests from PrintingStrings/ParamTest
-[ RUN      ] PrintingStrings/ParamTest.Success/a
-[       OK ] PrintingStrings/ParamTest.Success/a
-[ RUN      ] PrintingStrings/ParamTest.Failure/a
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  "b"
-  GetParam()
-    Which is: "a"
-Expected failure
-Stack trace: (omitted)
-
-[  FAILED  ] PrintingStrings/ParamTest.Failure/a, where GetParam() = "a"
-[----------] Global test environment tear-down
-BarEnvironment::TearDown() called.
-googletest-output-test_.cc:#: Failure
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-FooEnvironment::TearDown() called.
-googletest-output-test_.cc:#: Failure
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-[==========] 85 tests from 40 test suites ran.
-[  PASSED  ] 31 tests.
-[  FAILED  ] 54 tests, listed below:
-[  FAILED  ] NonfatalFailureTest.EscapesStringOperands
-[  FAILED  ] NonfatalFailureTest.DiffForLongStrings
-[  FAILED  ] FatalFailureTest.FatalFailureInSubroutine
-[  FAILED  ] FatalFailureTest.FatalFailureInNestedSubroutine
-[  FAILED  ] FatalFailureTest.NonfatalFailureInSubroutine
-[  FAILED  ] LoggingTest.InterleavingLoggingAndAssertions
-[  FAILED  ] SCOPED_TRACETest.AcceptedValues
-[  FAILED  ] SCOPED_TRACETest.ObeysScopes
-[  FAILED  ] SCOPED_TRACETest.WorksInLoop
-[  FAILED  ] SCOPED_TRACETest.WorksInSubroutine
-[  FAILED  ] SCOPED_TRACETest.CanBeNested
-[  FAILED  ] SCOPED_TRACETest.CanBeRepeated
-[  FAILED  ] SCOPED_TRACETest.WorksConcurrently
-[  FAILED  ] ScopedTraceTest.WithExplicitFileAndLine
-[  FAILED  ] NonFatalFailureInFixtureConstructorTest.FailureInConstructor
-[  FAILED  ] FatalFailureInFixtureConstructorTest.FailureInConstructor
-[  FAILED  ] NonFatalFailureInSetUpTest.FailureInSetUp
-[  FAILED  ] FatalFailureInSetUpTest.FailureInSetUp
-[  FAILED  ] AddFailureAtTest.MessageContainsSpecifiedFileAndLineNumber
-[  FAILED  ] GtestFailAtTest.MessageContainsSpecifiedFileAndLineNumber
-[  FAILED  ] MixedUpTestSuiteTest.ThisShouldFail
-[  FAILED  ] MixedUpTestSuiteTest.ThisShouldFailToo
-[  FAILED  ] MixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-[  FAILED  ] TEST_F_before_TEST_in_same_test_case.DefinedUsingTESTAndShouldFail
-[  FAILED  ] TEST_before_TEST_F_in_same_test_case.DefinedUsingTEST_FAndShouldFail
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenThereIsNoNonfatalFailure
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenThereAreTwoNonfatalFailures
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenThereIsOneFatalFailure
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenStatementReturns
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenStatementThrows
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenThereIsNoFatalFailure
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenThereAreTwoFatalFailures
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenThereIsOneNonfatalFailure
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenStatementReturns
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenStatementThrows
-[  FAILED  ] TypedTest/0.Failure, where TypeParam = int
-[  FAILED  ] TypedTestWithNames/char0.Failure, where TypeParam = char
-[  FAILED  ] TypedTestWithNames/int1.Failure, where TypeParam = int
-[  FAILED  ] Unsigned/TypedTestP/0.Failure, where TypeParam = unsigned char
-[  FAILED  ] Unsigned/TypedTestP/1.Failure, where TypeParam = unsigned int
-[  FAILED  ] UnsignedCustomName/TypedTestP/unsignedChar0.Failure, where TypeParam = unsigned char
-[  FAILED  ] UnsignedCustomName/TypedTestP/unsignedInt1.Failure, where TypeParam = unsigned int
-[  FAILED  ] ExpectFailureTest.ExpectFatalFailure
-[  FAILED  ] ExpectFailureTest.ExpectNonFatalFailure
-[  FAILED  ] ExpectFailureTest.ExpectFatalFailureOnAllThreads
-[  FAILED  ] ExpectFailureTest.ExpectNonFatalFailureOnAllThreads
-[  FAILED  ] ExpectFailureWithThreadsTest.ExpectFatalFailure
-[  FAILED  ] ExpectFailureWithThreadsTest.ExpectNonFatalFailure
-[  FAILED  ] ScopedFakeTestPartResultReporterTest.InterceptOnlyCurrentThread
-[  FAILED  ] DynamicFixture.DynamicTestFail
-[  FAILED  ] BadDynamicFixture1.TestBase
-[  FAILED  ] BadDynamicFixture2.Derived
-[  FAILED  ] PrintingFailingParams/FailingParamTest.Fails/0, where GetParam() = 2
-[  FAILED  ] PrintingStrings/ParamTest.Failure/a, where GetParam() = "a"
-
-54 FAILED TESTS
-  YOU HAVE 1 DISABLED TEST
-
-Note: Google Test filter = FatalFailureTest.*:LoggingTest.*
-[==========] Running 4 tests from 2 test suites.
-[----------] Global test environment set-up.
-[----------] 3 tests from FatalFailureTest
-[ RUN      ] FatalFailureTest.FatalFailureInSubroutine
-(expecting a failure that x should be 1)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  x
-    Which is: 2
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.FatalFailureInSubroutine (? ms)
-[ RUN      ] FatalFailureTest.FatalFailureInNestedSubroutine
-(expecting a failure that x should be 1)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  x
-    Which is: 2
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.FatalFailureInNestedSubroutine (? ms)
-[ RUN      ] FatalFailureTest.NonfatalFailureInSubroutine
-(expecting a failure on false)
-googletest-output-test_.cc:#: Failure
-Value of: false
-  Actual: false
-Expected: true
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.NonfatalFailureInSubroutine (? ms)
-[----------] 3 tests from FatalFailureTest (? ms total)
-
-[----------] 1 test from LoggingTest
-[ RUN      ] LoggingTest.InterleavingLoggingAndAssertions
-(expecting 2 failures on (3) >= (a[i]))
-i == 0
-i == 1
-googletest-output-test_.cc:#: Failure
-Expected: (3) >= (a[i]), actual: 3 vs 9
-Stack trace: (omitted)
-
-i == 2
-i == 3
-googletest-output-test_.cc:#: Failure
-Expected: (3) >= (a[i]), actual: 3 vs 6
-Stack trace: (omitted)
-
-[  FAILED  ] LoggingTest.InterleavingLoggingAndAssertions (? ms)
-[----------] 1 test from LoggingTest (? ms total)
-
-[----------] Global test environment tear-down
-[==========] 4 tests from 2 test suites ran. (? ms total)
-[  PASSED  ] 0 tests.
-[  FAILED  ] 4 tests, listed below:
-[  FAILED  ] FatalFailureTest.FatalFailureInSubroutine
-[  FAILED  ] FatalFailureTest.FatalFailureInNestedSubroutine
-[  FAILED  ] FatalFailureTest.NonfatalFailureInSubroutine
-[  FAILED  ] LoggingTest.InterleavingLoggingAndAssertions
-
- 4 FAILED TESTS
-Note: Google Test filter = *DISABLED_*
-[==========] Running 1 test from 1 test suite.
-[----------] Global test environment set-up.
-[----------] 1 test from DisabledTestsWarningTest
-[ RUN      ] DisabledTestsWarningTest.DISABLED_AlsoRunDisabledTestsFlagSuppressesWarning
-[       OK ] DisabledTestsWarningTest.DISABLED_AlsoRunDisabledTestsFlagSuppressesWarning
-[----------] Global test environment tear-down
-[==========] 1 test from 1 test suite ran.
-[  PASSED  ] 1 test.
-Note: Google Test filter = PassingTest.*
-Note: This is test shard 2 of 2.
-[==========] Running 1 test from 1 test suite.
-[----------] Global test environment set-up.
-[----------] 1 test from PassingTest
-[ RUN      ] PassingTest.PassingTest2
-[       OK ] PassingTest.PassingTest2
-[----------] Global test environment tear-down
-[==========] 1 test from 1 test suite ran.
-[  PASSED  ] 1 test.
diff --git a/3rdparty/gtest/test/googletest-output-test.py b/3rdparty/gtest/test/googletest-output-test.py
deleted file mode 100644
index c727f17a..00000000
--- a/3rdparty/gtest/test/googletest-output-test.py
+++ /dev/null
@@ -1,346 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Tests the text output of Google C++ Testing and Mocking Framework.
-
-To update the golden file:
-googletest_output_test.py --build_dir=BUILD/DIR --gengolden
-where BUILD/DIR contains the built googletest-output-test_ file.
-googletest_output_test.py --gengolden
-googletest_output_test.py
-"""
-
-import difflib
-import os
-import re
-import sys
-import gtest_test_utils
-
-
-# The flag for generating the golden file
-GENGOLDEN_FLAG = '--gengolden'
-CATCH_EXCEPTIONS_ENV_VAR_NAME = 'GTEST_CATCH_EXCEPTIONS'
-
-# The flag indicating stacktraces are not supported
-NO_STACKTRACE_SUPPORT_FLAG = '--no_stacktrace_support'
-
-IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
-IS_WINDOWS = os.name == 'nt'
-
-GOLDEN_NAME = 'googletest-output-test-golden-lin.txt'
-
-PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath('googletest-output-test_')
-
-# At least one command we exercise must not have the
-# 'internal_skip_environment_and_ad_hoc_tests' argument.
-COMMAND_LIST_TESTS = ({}, [PROGRAM_PATH, '--gtest_list_tests'])
-COMMAND_WITH_COLOR = ({}, [PROGRAM_PATH, '--gtest_color=yes'])
-COMMAND_WITH_TIME = ({}, [PROGRAM_PATH,
-                          '--gtest_print_time',
-                          'internal_skip_environment_and_ad_hoc_tests',
-                          '--gtest_filter=FatalFailureTest.*:LoggingTest.*'])
-COMMAND_WITH_DISABLED = (
-    {}, [PROGRAM_PATH,
-         '--gtest_also_run_disabled_tests',
-         'internal_skip_environment_and_ad_hoc_tests',
-         '--gtest_filter=*DISABLED_*'])
-COMMAND_WITH_SHARDING = (
-    {'GTEST_SHARD_INDEX': '1', 'GTEST_TOTAL_SHARDS': '2'},
-    [PROGRAM_PATH,
-     'internal_skip_environment_and_ad_hoc_tests',
-     '--gtest_filter=PassingTest.*'])
-
-GOLDEN_PATH = os.path.join(gtest_test_utils.GetSourceDir(), GOLDEN_NAME)
-
-
-def ToUnixLineEnding(s):
-  """Changes all Windows/Mac line endings in s to UNIX line endings."""
-
-  return s.replace('\r\n', '\n').replace('\r', '\n')
-
-
-def RemoveLocations(test_output):
-  """Removes all file location info from a Google Test program's output.
-
-  Args:
-       test_output:  the output of a Google Test program.
-
-  Returns:
-       output with all file location info (in the form of
-       'DIRECTORY/FILE_NAME:LINE_NUMBER: 'or
-       'DIRECTORY\\FILE_NAME(LINE_NUMBER): ') replaced by
-       'FILE_NAME:#: '.
-  """
-
-  return re.sub(r'.*[/\\]((googletest-output-test_|gtest).cc)(\:\d+|\(\d+\))\: ',
-                r'\1:#: ', test_output)
-
-
-def RemoveStackTraceDetails(output):
-  """Removes all stack traces from a Google Test program's output."""
-
-  # *? means "find the shortest string that matches".
-  return re.sub(r'Stack trace:(.|\n)*?\n\n',
-                'Stack trace: (omitted)\n\n', output)
-
-
-def RemoveStackTraces(output):
-  """Removes all traces of stack traces from a Google Test program's output."""
-
-  # *? means "find the shortest string that matches".
-  return re.sub(r'Stack trace:(.|\n)*?\n\n', '', output)
-
-
-def RemoveTime(output):
-  """Removes all time information from a Google Test program's output."""
-
-  return re.sub(r'\(\d+ ms', '(? ms', output)
-
-
-def RemoveTypeInfoDetails(test_output):
-  """Removes compiler-specific type info from Google Test program's output.
-
-  Args:
-       test_output:  the output of a Google Test program.
-
-  Returns:
-       output with type information normalized to canonical form.
-  """
-
-  # some compilers output the name of type 'unsigned int' as 'unsigned'
-  return re.sub(r'unsigned int', 'unsigned', test_output)
-
-
-def NormalizeToCurrentPlatform(test_output):
-  """Normalizes platform specific output details for easier comparison."""
-
-  if IS_WINDOWS:
-    # Removes the color information that is not present on Windows.
-    test_output = re.sub('\x1b\\[(0;3\d)?m', '', test_output)
-    # Changes failure message headers into the Windows format.
-    test_output = re.sub(r': Failure\n', r': error: ', test_output)
-    # Changes file(line_number) to file:line_number.
-    test_output = re.sub(r'((\w|\.)+)\((\d+)\):', r'\1:\3:', test_output)
-
-  return test_output
-
-
-def RemoveTestCounts(output):
-  """Removes test counts from a Google Test program's output."""
-
-  output = re.sub(r'\d+ tests?, listed below',
-                  '? tests, listed below', output)
-  output = re.sub(r'\d+ FAILED TESTS',
-                  '? FAILED TESTS', output)
-  output = re.sub(r'\d+ tests? from \d+ test cases?',
-                  '? tests from ? test cases', output)
-  output = re.sub(r'\d+ tests? from ([a-zA-Z_])',
-                  r'? tests from \1', output)
-  return re.sub(r'\d+ tests?\.', '? tests.', output)
-
-
-def RemoveMatchingTests(test_output, pattern):
-  """Removes output of specified tests from a Google Test program's output.
-
-  This function strips not only the beginning and the end of a test but also
-  all output in between.
-
-  Args:
-    test_output:       A string containing the test output.
-    pattern:           A regex string that matches names of test cases or
-                       tests to remove.
-
-  Returns:
-    Contents of test_output with tests whose names match pattern removed.
-  """
-
-  test_output = re.sub(
-      r'.*\[ RUN      \] .*%s(.|\n)*?\[(  FAILED  |       OK )\] .*%s.*\n' % (
-          pattern, pattern),
-      '',
-      test_output)
-  return re.sub(r'.*%s.*\n' % pattern, '', test_output)
-
-
-def NormalizeOutput(output):
-  """Normalizes output (the output of googletest-output-test_.exe)."""
-
-  output = ToUnixLineEnding(output)
-  output = RemoveLocations(output)
-  output = RemoveStackTraceDetails(output)
-  output = RemoveTime(output)
-  return output
-
-
-def GetShellCommandOutput(env_cmd):
-  """Runs a command in a sub-process, and returns its output in a string.
-
-  Args:
-    env_cmd: The shell command. A 2-tuple where element 0 is a dict of extra
-             environment variables to set, and element 1 is a string with
-             the command and any flags.
-
-  Returns:
-    A string with the command's combined standard and diagnostic output.
-  """
-
-  # Spawns cmd in a sub-process, and gets its standard I/O file objects.
-  # Set and save the environment properly.
-  environ = os.environ.copy()
-  environ.update(env_cmd[0])
-  p = gtest_test_utils.Subprocess(env_cmd[1], env=environ)
-
-  return p.output
-
-
-def GetCommandOutput(env_cmd):
-  """Runs a command and returns its output with all file location
-  info stripped off.
-
-  Args:
-    env_cmd:  The shell command. A 2-tuple where element 0 is a dict of extra
-              environment variables to set, and element 1 is a string with
-              the command and any flags.
-  """
-
-  # Disables exception pop-ups on Windows.
-  environ, cmdline = env_cmd
-  environ = dict(environ)  # Ensures we are modifying a copy.
-  environ[CATCH_EXCEPTIONS_ENV_VAR_NAME] = '1'
-  return NormalizeOutput(GetShellCommandOutput((environ, cmdline)))
-
-
-def GetOutputOfAllCommands():
-  """Returns concatenated output from several representative commands."""
-
-  return (GetCommandOutput(COMMAND_WITH_COLOR) +
-          GetCommandOutput(COMMAND_WITH_TIME) +
-          GetCommandOutput(COMMAND_WITH_DISABLED) +
-          GetCommandOutput(COMMAND_WITH_SHARDING))
-
-
-test_list = GetShellCommandOutput(COMMAND_LIST_TESTS)
-SUPPORTS_DEATH_TESTS = 'DeathTest' in test_list
-SUPPORTS_TYPED_TESTS = 'TypedTest' in test_list
-SUPPORTS_THREADS = 'ExpectFailureWithThreadsTest' in test_list
-SUPPORTS_STACK_TRACES = NO_STACKTRACE_SUPPORT_FLAG not in sys.argv
-
-CAN_GENERATE_GOLDEN_FILE = (SUPPORTS_DEATH_TESTS and
-                            SUPPORTS_TYPED_TESTS and
-                            SUPPORTS_THREADS and
-                            SUPPORTS_STACK_TRACES)
-
-class GTestOutputTest(gtest_test_utils.TestCase):
-  def RemoveUnsupportedTests(self, test_output):
-    if not SUPPORTS_DEATH_TESTS:
-      test_output = RemoveMatchingTests(test_output, 'DeathTest')
-    if not SUPPORTS_TYPED_TESTS:
-      test_output = RemoveMatchingTests(test_output, 'TypedTest')
-      test_output = RemoveMatchingTests(test_output, 'TypedDeathTest')
-      test_output = RemoveMatchingTests(test_output, 'TypeParamDeathTest')
-    if not SUPPORTS_THREADS:
-      test_output = RemoveMatchingTests(test_output,
-                                        'ExpectFailureWithThreadsTest')
-      test_output = RemoveMatchingTests(test_output,
-                                        'ScopedFakeTestPartResultReporterTest')
-      test_output = RemoveMatchingTests(test_output,
-                                        'WorksConcurrently')
-    if not SUPPORTS_STACK_TRACES:
-      test_output = RemoveStackTraces(test_output)
-
-    return test_output
-
-  def testOutput(self):
-    output = GetOutputOfAllCommands()
-
-    golden_file = open(GOLDEN_PATH, 'rb')
-    # A mis-configured source control system can cause \r appear in EOL
-    # sequences when we read the golden file irrespective of an operating
-    # system used. Therefore, we need to strip those \r's from newlines
-    # unconditionally.
-    golden = ToUnixLineEnding(golden_file.read().decode())
-    golden_file.close()
-
-    # We want the test to pass regardless of certain features being
-    # supported or not.
-
-    # We still have to remove type name specifics in all cases.
-    normalized_actual = RemoveTypeInfoDetails(output)
-    normalized_golden = RemoveTypeInfoDetails(golden)
-
-    if CAN_GENERATE_GOLDEN_FILE:
-      self.assertEqual(normalized_golden, normalized_actual,
-                       '\n'.join(difflib.unified_diff(
-                           normalized_golden.split('\n'),
-                           normalized_actual.split('\n'),
-                           'golden', 'actual')))
-    else:
-      normalized_actual = NormalizeToCurrentPlatform(
-          RemoveTestCounts(normalized_actual))
-      normalized_golden = NormalizeToCurrentPlatform(
-          RemoveTestCounts(self.RemoveUnsupportedTests(normalized_golden)))
-
-      # This code is very handy when debugging golden file differences:
-      if os.getenv('DEBUG_GTEST_OUTPUT_TEST'):
-        open(os.path.join(
-            gtest_test_utils.GetSourceDir(),
-            '_googletest-output-test_normalized_actual.txt'), 'wb').write(
-                normalized_actual)
-        open(os.path.join(
-            gtest_test_utils.GetSourceDir(),
-            '_googletest-output-test_normalized_golden.txt'), 'wb').write(
-                normalized_golden)
-
-      self.assertEqual(normalized_golden, normalized_actual)
-
-
-if __name__ == '__main__':
-  if NO_STACKTRACE_SUPPORT_FLAG in sys.argv:
-    # unittest.main() can't handle unknown flags
-    sys.argv.remove(NO_STACKTRACE_SUPPORT_FLAG)
-
-  if GENGOLDEN_FLAG in sys.argv:
-    if CAN_GENERATE_GOLDEN_FILE:
-      output = GetOutputOfAllCommands()
-      golden_file = open(GOLDEN_PATH, 'wb')
-      golden_file.write(output)
-      golden_file.close()
-    else:
-      message = (
-          """Unable to write a golden file when compiled in an environment
-that does not support all the required features (death tests,
-typed tests, stack traces, and multiple threads).
-Please build this test and generate the golden file using Blaze on Linux.""")
-
-      sys.stderr.write(message)
-      sys.exit(1)
-  else:
-    gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-output-test_.cc b/3rdparty/gtest/test/googletest-output-test_.cc
deleted file mode 100644
index 4f716d84..00000000
--- a/3rdparty/gtest/test/googletest-output-test_.cc
+++ /dev/null
@@ -1,1157 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The purpose of this file is to generate Google Test output under
-// various conditions.  The output will then be verified by
-// googletest-output-test.py to ensure that Google Test generates the
-// desired messages.  Therefore, most tests in this file are MEANT TO
-// FAIL.
-
-#include "gtest/gtest-spi.h"
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-#include <stdlib.h>
-
-#if _MSC_VER
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4127 /* conditional expression is constant */)
-#endif  //  _MSC_VER
-
-#if GTEST_IS_THREADSAFE
-using testing::ScopedFakeTestPartResultReporter;
-using testing::TestPartResultArray;
-
-using testing::internal::Notification;
-using testing::internal::ThreadWithParam;
-#endif
-
-namespace posix = ::testing::internal::posix;
-
-// Tests catching fatal failures.
-
-// A subroutine used by the following test.
-void TestEq1(int x) {
-  ASSERT_EQ(1, x);
-}
-
-// This function calls a test subroutine, catches the fatal failure it
-// generates, and then returns early.
-void TryTestSubroutine() {
-  // Calls a subrountine that yields a fatal failure.
-  TestEq1(2);
-
-  // Catches the fatal failure and aborts the test.
-  //
-  // The testing::Test:: prefix is necessary when calling
-  // HasFatalFailure() outside of a TEST, TEST_F, or test fixture.
-  if (testing::Test::HasFatalFailure()) return;
-
-  // If we get here, something is wrong.
-  FAIL() << "This should never be reached.";
-}
-
-TEST(PassingTest, PassingTest1) {
-}
-
-TEST(PassingTest, PassingTest2) {
-}
-
-// Tests that parameters of failing parameterized tests are printed in the
-// failing test summary.
-class FailingParamTest : public testing::TestWithParam<int> {};
-
-TEST_P(FailingParamTest, Fails) {
-  EXPECT_EQ(1, GetParam());
-}
-
-// This generates a test which will fail. Google Test is expected to print
-// its parameter when it outputs the list of all failed tests.
-INSTANTIATE_TEST_SUITE_P(PrintingFailingParams,
-                         FailingParamTest,
-                         testing::Values(2));
-
-// Tests that an empty value for the test suite basename yields just
-// the test name without any prior /
-class EmptyBasenameParamInst : public testing::TestWithParam<int> {};
-
-TEST_P(EmptyBasenameParamInst, Passes) { EXPECT_EQ(1, GetParam()); }
-
-INSTANTIATE_TEST_SUITE_P(, EmptyBasenameParamInst, testing::Values(1));
-
-static const char kGoldenString[] = "\"Line\0 1\"\nLine 2";
-
-TEST(NonfatalFailureTest, EscapesStringOperands) {
-  std::string actual = "actual \"string\"";
-  EXPECT_EQ(kGoldenString, actual);
-
-  const char* golden = kGoldenString;
-  EXPECT_EQ(golden, actual);
-}
-
-TEST(NonfatalFailureTest, DiffForLongStrings) {
-  std::string golden_str(kGoldenString, sizeof(kGoldenString) - 1);
-  EXPECT_EQ(golden_str, "Line 2");
-}
-
-// Tests catching a fatal failure in a subroutine.
-TEST(FatalFailureTest, FatalFailureInSubroutine) {
-  printf("(expecting a failure that x should be 1)\n");
-
-  TryTestSubroutine();
-}
-
-// Tests catching a fatal failure in a nested subroutine.
-TEST(FatalFailureTest, FatalFailureInNestedSubroutine) {
-  printf("(expecting a failure that x should be 1)\n");
-
-  // Calls a subrountine that yields a fatal failure.
-  TryTestSubroutine();
-
-  // Catches the fatal failure and aborts the test.
-  //
-  // When calling HasFatalFailure() inside a TEST, TEST_F, or test
-  // fixture, the testing::Test:: prefix is not needed.
-  if (HasFatalFailure()) return;
-
-  // If we get here, something is wrong.
-  FAIL() << "This should never be reached.";
-}
-
-// Tests HasFatalFailure() after a failed EXPECT check.
-TEST(FatalFailureTest, NonfatalFailureInSubroutine) {
-  printf("(expecting a failure on false)\n");
-  EXPECT_TRUE(false);  // Generates a nonfatal failure
-  ASSERT_FALSE(HasFatalFailure());  // This should succeed.
-}
-
-// Tests interleaving user logging and Google Test assertions.
-TEST(LoggingTest, InterleavingLoggingAndAssertions) {
-  static const int a[4] = {
-    3, 9, 2, 6
-  };
-
-  printf("(expecting 2 failures on (3) >= (a[i]))\n");
-  for (int i = 0; i < static_cast<int>(sizeof(a)/sizeof(*a)); i++) {
-    printf("i == %d\n", i);
-    EXPECT_GE(3, a[i]);
-  }
-}
-
-// Tests the SCOPED_TRACE macro.
-
-// A helper function for testing SCOPED_TRACE.
-void SubWithoutTrace(int n) {
-  EXPECT_EQ(1, n);
-  ASSERT_EQ(2, n);
-}
-
-// Another helper function for testing SCOPED_TRACE.
-void SubWithTrace(int n) {
-  SCOPED_TRACE(testing::Message() << "n = " << n);
-
-  SubWithoutTrace(n);
-}
-
-TEST(SCOPED_TRACETest, AcceptedValues) {
-  SCOPED_TRACE("literal string");
-  SCOPED_TRACE(std::string("std::string"));
-  SCOPED_TRACE(1337);  // streamable type
-  const char* null_value = nullptr;
-  SCOPED_TRACE(null_value);
-
-  ADD_FAILURE() << "Just checking that all these values work fine.";
-}
-
-// Tests that SCOPED_TRACE() obeys lexical scopes.
-TEST(SCOPED_TRACETest, ObeysScopes) {
-  printf("(expected to fail)\n");
-
-  // There should be no trace before SCOPED_TRACE() is invoked.
-  ADD_FAILURE() << "This failure is expected, and shouldn't have a trace.";
-
-  {
-    SCOPED_TRACE("Expected trace");
-    // After SCOPED_TRACE(), a failure in the current scope should contain
-    // the trace.
-    ADD_FAILURE() << "This failure is expected, and should have a trace.";
-  }
-
-  // Once the control leaves the scope of the SCOPED_TRACE(), there
-  // should be no trace again.
-  ADD_FAILURE() << "This failure is expected, and shouldn't have a trace.";
-}
-
-// Tests that SCOPED_TRACE works inside a loop.
-TEST(SCOPED_TRACETest, WorksInLoop) {
-  printf("(expected to fail)\n");
-
-  for (int i = 1; i <= 2; i++) {
-    SCOPED_TRACE(testing::Message() << "i = " << i);
-
-    SubWithoutTrace(i);
-  }
-}
-
-// Tests that SCOPED_TRACE works in a subroutine.
-TEST(SCOPED_TRACETest, WorksInSubroutine) {
-  printf("(expected to fail)\n");
-
-  SubWithTrace(1);
-  SubWithTrace(2);
-}
-
-// Tests that SCOPED_TRACE can be nested.
-TEST(SCOPED_TRACETest, CanBeNested) {
-  printf("(expected to fail)\n");
-
-  SCOPED_TRACE("");  // A trace without a message.
-
-  SubWithTrace(2);
-}
-
-// Tests that multiple SCOPED_TRACEs can be used in the same scope.
-TEST(SCOPED_TRACETest, CanBeRepeated) {
-  printf("(expected to fail)\n");
-
-  SCOPED_TRACE("A");
-  ADD_FAILURE()
-      << "This failure is expected, and should contain trace point A.";
-
-  SCOPED_TRACE("B");
-  ADD_FAILURE()
-      << "This failure is expected, and should contain trace point A and B.";
-
-  {
-    SCOPED_TRACE("C");
-    ADD_FAILURE() << "This failure is expected, and should "
-                  << "contain trace point A, B, and C.";
-  }
-
-  SCOPED_TRACE("D");
-  ADD_FAILURE() << "This failure is expected, and should "
-                << "contain trace point A, B, and D.";
-}
-
-#if GTEST_IS_THREADSAFE
-// Tests that SCOPED_TRACE()s can be used concurrently from multiple
-// threads.  Namely, an assertion should be affected by
-// SCOPED_TRACE()s in its own thread only.
-
-// Here's the sequence of actions that happen in the test:
-//
-//   Thread A (main)                | Thread B (spawned)
-//   ===============================|================================
-//   spawns thread B                |
-//   -------------------------------+--------------------------------
-//   waits for n1                   | SCOPED_TRACE("Trace B");
-//                                  | generates failure #1
-//                                  | notifies n1
-//   -------------------------------+--------------------------------
-//   SCOPED_TRACE("Trace A");       | waits for n2
-//   generates failure #2           |
-//   notifies n2                    |
-//   -------------------------------|--------------------------------
-//   waits for n3                   | generates failure #3
-//                                  | trace B dies
-//                                  | generates failure #4
-//                                  | notifies n3
-//   -------------------------------|--------------------------------
-//   generates failure #5           | finishes
-//   trace A dies                   |
-//   generates failure #6           |
-//   -------------------------------|--------------------------------
-//   waits for thread B to finish   |
-
-struct CheckPoints {
-  Notification n1;
-  Notification n2;
-  Notification n3;
-};
-
-static void ThreadWithScopedTrace(CheckPoints* check_points) {
-  {
-    SCOPED_TRACE("Trace B");
-    ADD_FAILURE()
-        << "Expected failure #1 (in thread B, only trace B alive).";
-    check_points->n1.Notify();
-    check_points->n2.WaitForNotification();
-
-    ADD_FAILURE()
-        << "Expected failure #3 (in thread B, trace A & B both alive).";
-  }  // Trace B dies here.
-  ADD_FAILURE()
-      << "Expected failure #4 (in thread B, only trace A alive).";
-  check_points->n3.Notify();
-}
-
-TEST(SCOPED_TRACETest, WorksConcurrently) {
-  printf("(expecting 6 failures)\n");
-
-  CheckPoints check_points;
-  ThreadWithParam<CheckPoints*> thread(&ThreadWithScopedTrace, &check_points,
-                                       nullptr);
-  check_points.n1.WaitForNotification();
-
-  {
-    SCOPED_TRACE("Trace A");
-    ADD_FAILURE()
-        << "Expected failure #2 (in thread A, trace A & B both alive).";
-    check_points.n2.Notify();
-    check_points.n3.WaitForNotification();
-
-    ADD_FAILURE()
-        << "Expected failure #5 (in thread A, only trace A alive).";
-  }  // Trace A dies here.
-  ADD_FAILURE()
-      << "Expected failure #6 (in thread A, no trace alive).";
-  thread.Join();
-}
-#endif  // GTEST_IS_THREADSAFE
-
-// Tests basic functionality of the ScopedTrace utility (most of its features
-// are already tested in SCOPED_TRACETest).
-TEST(ScopedTraceTest, WithExplicitFileAndLine) {
-  testing::ScopedTrace trace("explicit_file.cc", 123, "expected trace message");
-  ADD_FAILURE() << "Check that the trace is attached to a particular location.";
-}
-
-TEST(DisabledTestsWarningTest,
-     DISABLED_AlsoRunDisabledTestsFlagSuppressesWarning) {
-  // This test body is intentionally empty.  Its sole purpose is for
-  // verifying that the --gtest_also_run_disabled_tests flag
-  // suppresses the "YOU HAVE 12 DISABLED TESTS" warning at the end of
-  // the test output.
-}
-
-// Tests using assertions outside of TEST and TEST_F.
-//
-// This function creates two failures intentionally.
-void AdHocTest() {
-  printf("The non-test part of the code is expected to have 2 failures.\n\n");
-  EXPECT_TRUE(false);
-  EXPECT_EQ(2, 3);
-}
-
-// Runs all TESTs, all TEST_Fs, and the ad hoc test.
-int RunAllTests() {
-  AdHocTest();
-  return RUN_ALL_TESTS();
-}
-
-// Tests non-fatal failures in the fixture constructor.
-class NonFatalFailureInFixtureConstructorTest : public testing::Test {
- protected:
-  NonFatalFailureInFixtureConstructorTest() {
-    printf("(expecting 5 failures)\n");
-    ADD_FAILURE() << "Expected failure #1, in the test fixture c'tor.";
-  }
-
-  ~NonFatalFailureInFixtureConstructorTest() override {
-    ADD_FAILURE() << "Expected failure #5, in the test fixture d'tor.";
-  }
-
-  void SetUp() override { ADD_FAILURE() << "Expected failure #2, in SetUp()."; }
-
-  void TearDown() override {
-    ADD_FAILURE() << "Expected failure #4, in TearDown.";
-  }
-};
-
-TEST_F(NonFatalFailureInFixtureConstructorTest, FailureInConstructor) {
-  ADD_FAILURE() << "Expected failure #3, in the test body.";
-}
-
-// Tests fatal failures in the fixture constructor.
-class FatalFailureInFixtureConstructorTest : public testing::Test {
- protected:
-  FatalFailureInFixtureConstructorTest() {
-    printf("(expecting 2 failures)\n");
-    Init();
-  }
-
-  ~FatalFailureInFixtureConstructorTest() override {
-    ADD_FAILURE() << "Expected failure #2, in the test fixture d'tor.";
-  }
-
-  void SetUp() override {
-    ADD_FAILURE() << "UNEXPECTED failure in SetUp().  "
-                  << "We should never get here, as the test fixture c'tor "
-                  << "had a fatal failure.";
-  }
-
-  void TearDown() override {
-    ADD_FAILURE() << "UNEXPECTED failure in TearDown().  "
-                  << "We should never get here, as the test fixture c'tor "
-                  << "had a fatal failure.";
-  }
-
- private:
-  void Init() {
-    FAIL() << "Expected failure #1, in the test fixture c'tor.";
-  }
-};
-
-TEST_F(FatalFailureInFixtureConstructorTest, FailureInConstructor) {
-  ADD_FAILURE() << "UNEXPECTED failure in the test body.  "
-                << "We should never get here, as the test fixture c'tor "
-                << "had a fatal failure.";
-}
-
-// Tests non-fatal failures in SetUp().
-class NonFatalFailureInSetUpTest : public testing::Test {
- protected:
-  ~NonFatalFailureInSetUpTest() override { Deinit(); }
-
-  void SetUp() override {
-    printf("(expecting 4 failures)\n");
-    ADD_FAILURE() << "Expected failure #1, in SetUp().";
-  }
-
-  void TearDown() override { FAIL() << "Expected failure #3, in TearDown()."; }
-
- private:
-  void Deinit() {
-    FAIL() << "Expected failure #4, in the test fixture d'tor.";
-  }
-};
-
-TEST_F(NonFatalFailureInSetUpTest, FailureInSetUp) {
-  FAIL() << "Expected failure #2, in the test function.";
-}
-
-// Tests fatal failures in SetUp().
-class FatalFailureInSetUpTest : public testing::Test {
- protected:
-  ~FatalFailureInSetUpTest() override { Deinit(); }
-
-  void SetUp() override {
-    printf("(expecting 3 failures)\n");
-    FAIL() << "Expected failure #1, in SetUp().";
-  }
-
-  void TearDown() override { FAIL() << "Expected failure #2, in TearDown()."; }
-
- private:
-  void Deinit() {
-    FAIL() << "Expected failure #3, in the test fixture d'tor.";
-  }
-};
-
-TEST_F(FatalFailureInSetUpTest, FailureInSetUp) {
-  FAIL() << "UNEXPECTED failure in the test function.  "
-         << "We should never get here, as SetUp() failed.";
-}
-
-TEST(AddFailureAtTest, MessageContainsSpecifiedFileAndLineNumber) {
-  ADD_FAILURE_AT("foo.cc", 42) << "Expected nonfatal failure in foo.cc";
-}
-
-TEST(GtestFailAtTest, MessageContainsSpecifiedFileAndLineNumber) {
-  GTEST_FAIL_AT("foo.cc", 42) << "Expected fatal failure in foo.cc";
-}
-
-#if GTEST_IS_THREADSAFE
-
-// A unary function that may die.
-void DieIf(bool should_die) {
-  GTEST_CHECK_(!should_die) << " - death inside DieIf().";
-}
-
-// Tests running death tests in a multi-threaded context.
-
-// Used for coordination between the main and the spawn thread.
-struct SpawnThreadNotifications {
-  SpawnThreadNotifications() {}
-
-  Notification spawn_thread_started;
-  Notification spawn_thread_ok_to_terminate;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(SpawnThreadNotifications);
-};
-
-// The function to be executed in the thread spawn by the
-// MultipleThreads test (below).
-static void ThreadRoutine(SpawnThreadNotifications* notifications) {
-  // Signals the main thread that this thread has started.
-  notifications->spawn_thread_started.Notify();
-
-  // Waits for permission to finish from the main thread.
-  notifications->spawn_thread_ok_to_terminate.WaitForNotification();
-}
-
-// This is a death-test test, but it's not named with a DeathTest
-// suffix.  It starts threads which might interfere with later
-// death tests, so it must run after all other death tests.
-class DeathTestAndMultiThreadsTest : public testing::Test {
- protected:
-  // Starts a thread and waits for it to begin.
-  void SetUp() override {
-    thread_.reset(new ThreadWithParam<SpawnThreadNotifications*>(
-        &ThreadRoutine, &notifications_, nullptr));
-    notifications_.spawn_thread_started.WaitForNotification();
-  }
-  // Tells the thread to finish, and reaps it.
-  // Depending on the version of the thread library in use,
-  // a manager thread might still be left running that will interfere
-  // with later death tests.  This is unfortunate, but this class
-  // cleans up after itself as best it can.
-  void TearDown() override {
-    notifications_.spawn_thread_ok_to_terminate.Notify();
-  }
-
- private:
-  SpawnThreadNotifications notifications_;
-  std::unique_ptr<ThreadWithParam<SpawnThreadNotifications*> > thread_;
-};
-
-#endif  // GTEST_IS_THREADSAFE
-
-// The MixedUpTestSuiteTest test case verifies that Google Test will fail a
-// test if it uses a different fixture class than what other tests in
-// the same test case use.  It deliberately contains two fixture
-// classes with the same name but defined in different namespaces.
-
-// The MixedUpTestSuiteWithSameTestNameTest test case verifies that
-// when the user defines two tests with the same test case name AND
-// same test name (but in different namespaces), the second test will
-// fail.
-
-namespace foo {
-
-class MixedUpTestSuiteTest : public testing::Test {
-};
-
-TEST_F(MixedUpTestSuiteTest, FirstTestFromNamespaceFoo) {}
-TEST_F(MixedUpTestSuiteTest, SecondTestFromNamespaceFoo) {}
-
-class MixedUpTestSuiteWithSameTestNameTest : public testing::Test {
-};
-
-TEST_F(MixedUpTestSuiteWithSameTestNameTest,
-       TheSecondTestWithThisNameShouldFail) {}
-
-}  // namespace foo
-
-namespace bar {
-
-class MixedUpTestSuiteTest : public testing::Test {
-};
-
-// The following two tests are expected to fail.  We rely on the
-// golden file to check that Google Test generates the right error message.
-TEST_F(MixedUpTestSuiteTest, ThisShouldFail) {}
-TEST_F(MixedUpTestSuiteTest, ThisShouldFailToo) {}
-
-class MixedUpTestSuiteWithSameTestNameTest : public testing::Test {
-};
-
-// Expected to fail.  We rely on the golden file to check that Google Test
-// generates the right error message.
-TEST_F(MixedUpTestSuiteWithSameTestNameTest,
-       TheSecondTestWithThisNameShouldFail) {}
-
-}  // namespace bar
-
-// The following two test cases verify that Google Test catches the user
-// error of mixing TEST and TEST_F in the same test case.  The first
-// test case checks the scenario where TEST_F appears before TEST, and
-// the second one checks where TEST appears before TEST_F.
-
-class TEST_F_before_TEST_in_same_test_case : public testing::Test {
-};
-
-TEST_F(TEST_F_before_TEST_in_same_test_case, DefinedUsingTEST_F) {}
-
-// Expected to fail.  We rely on the golden file to check that Google Test
-// generates the right error message.
-TEST(TEST_F_before_TEST_in_same_test_case, DefinedUsingTESTAndShouldFail) {}
-
-class TEST_before_TEST_F_in_same_test_case : public testing::Test {
-};
-
-TEST(TEST_before_TEST_F_in_same_test_case, DefinedUsingTEST) {}
-
-// Expected to fail.  We rely on the golden file to check that Google Test
-// generates the right error message.
-TEST_F(TEST_before_TEST_F_in_same_test_case, DefinedUsingTEST_FAndShouldFail) {
-}
-
-// Used for testing EXPECT_NONFATAL_FAILURE() and EXPECT_FATAL_FAILURE().
-int global_integer = 0;
-
-// Tests that EXPECT_NONFATAL_FAILURE() can reference global variables.
-TEST(ExpectNonfatalFailureTest, CanReferenceGlobalVariables) {
-  global_integer = 0;
-  EXPECT_NONFATAL_FAILURE({
-    EXPECT_EQ(1, global_integer) << "Expected non-fatal failure.";
-  }, "Expected non-fatal failure.");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() can reference local variables
-// (static or not).
-TEST(ExpectNonfatalFailureTest, CanReferenceLocalVariables) {
-  int m = 0;
-  static int n;
-  n = 1;
-  EXPECT_NONFATAL_FAILURE({
-    EXPECT_EQ(m, n) << "Expected non-fatal failure.";
-  }, "Expected non-fatal failure.");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() succeeds when there is exactly
-// one non-fatal failure and no fatal failure.
-TEST(ExpectNonfatalFailureTest, SucceedsWhenThereIsOneNonfatalFailure) {
-  EXPECT_NONFATAL_FAILURE({
-    ADD_FAILURE() << "Expected non-fatal failure.";
-  }, "Expected non-fatal failure.");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when there is no
-// non-fatal failure.
-TEST(ExpectNonfatalFailureTest, FailsWhenThereIsNoNonfatalFailure) {
-  printf("(expecting a failure)\n");
-  EXPECT_NONFATAL_FAILURE({
-  }, "");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when there are two
-// non-fatal failures.
-TEST(ExpectNonfatalFailureTest, FailsWhenThereAreTwoNonfatalFailures) {
-  printf("(expecting a failure)\n");
-  EXPECT_NONFATAL_FAILURE({
-    ADD_FAILURE() << "Expected non-fatal failure 1.";
-    ADD_FAILURE() << "Expected non-fatal failure 2.";
-  }, "");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when there is one fatal
-// failure.
-TEST(ExpectNonfatalFailureTest, FailsWhenThereIsOneFatalFailure) {
-  printf("(expecting a failure)\n");
-  EXPECT_NONFATAL_FAILURE({
-    FAIL() << "Expected fatal failure.";
-  }, "");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when the statement being
-// tested returns.
-TEST(ExpectNonfatalFailureTest, FailsWhenStatementReturns) {
-  printf("(expecting a failure)\n");
-  EXPECT_NONFATAL_FAILURE({
-    return;
-  }, "");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when the statement being
-// tested throws.
-TEST(ExpectNonfatalFailureTest, FailsWhenStatementThrows) {
-  printf("(expecting a failure)\n");
-  try {
-    EXPECT_NONFATAL_FAILURE({
-      throw 0;
-    }, "");
-  } catch(int) {  // NOLINT
-  }
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Tests that EXPECT_FATAL_FAILURE() can reference global variables.
-TEST(ExpectFatalFailureTest, CanReferenceGlobalVariables) {
-  global_integer = 0;
-  EXPECT_FATAL_FAILURE({
-    ASSERT_EQ(1, global_integer) << "Expected fatal failure.";
-  }, "Expected fatal failure.");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() can reference local static
-// variables.
-TEST(ExpectFatalFailureTest, CanReferenceLocalStaticVariables) {
-  static int n;
-  n = 1;
-  EXPECT_FATAL_FAILURE({
-    ASSERT_EQ(0, n) << "Expected fatal failure.";
-  }, "Expected fatal failure.");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() succeeds when there is exactly
-// one fatal failure and no non-fatal failure.
-TEST(ExpectFatalFailureTest, SucceedsWhenThereIsOneFatalFailure) {
-  EXPECT_FATAL_FAILURE({
-    FAIL() << "Expected fatal failure.";
-  }, "Expected fatal failure.");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() fails when there is no fatal
-// failure.
-TEST(ExpectFatalFailureTest, FailsWhenThereIsNoFatalFailure) {
-  printf("(expecting a failure)\n");
-  EXPECT_FATAL_FAILURE({
-  }, "");
-}
-
-// A helper for generating a fatal failure.
-void FatalFailure() {
-  FAIL() << "Expected fatal failure.";
-}
-
-// Tests that EXPECT_FATAL_FAILURE() fails when there are two
-// fatal failures.
-TEST(ExpectFatalFailureTest, FailsWhenThereAreTwoFatalFailures) {
-  printf("(expecting a failure)\n");
-  EXPECT_FATAL_FAILURE({
-    FatalFailure();
-    FatalFailure();
-  }, "");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() fails when there is one non-fatal
-// failure.
-TEST(ExpectFatalFailureTest, FailsWhenThereIsOneNonfatalFailure) {
-  printf("(expecting a failure)\n");
-  EXPECT_FATAL_FAILURE({
-    ADD_FAILURE() << "Expected non-fatal failure.";
-  }, "");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() fails when the statement being
-// tested returns.
-TEST(ExpectFatalFailureTest, FailsWhenStatementReturns) {
-  printf("(expecting a failure)\n");
-  EXPECT_FATAL_FAILURE({
-    return;
-  }, "");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Tests that EXPECT_FATAL_FAILURE() fails when the statement being
-// tested throws.
-TEST(ExpectFatalFailureTest, FailsWhenStatementThrows) {
-  printf("(expecting a failure)\n");
-  try {
-    EXPECT_FATAL_FAILURE({
-      throw 0;
-    }, "");
-  } catch(int) {  // NOLINT
-  }
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// This #ifdef block tests the output of value-parameterized tests.
-
-std::string ParamNameFunc(const testing::TestParamInfo<std::string>& info) {
-  return info.param;
-}
-
-class ParamTest : public testing::TestWithParam<std::string> {
-};
-
-TEST_P(ParamTest, Success) {
-  EXPECT_EQ("a", GetParam());
-}
-
-TEST_P(ParamTest, Failure) {
-  EXPECT_EQ("b", GetParam()) << "Expected failure";
-}
-
-INSTANTIATE_TEST_SUITE_P(PrintingStrings,
-                         ParamTest,
-                         testing::Values(std::string("a")),
-                         ParamNameFunc);
-
-// This #ifdef block tests the output of typed tests.
-#if GTEST_HAS_TYPED_TEST
-
-template <typename T>
-class TypedTest : public testing::Test {
-};
-
-TYPED_TEST_SUITE(TypedTest, testing::Types<int>);
-
-TYPED_TEST(TypedTest, Success) {
-  EXPECT_EQ(0, TypeParam());
-}
-
-TYPED_TEST(TypedTest, Failure) {
-  EXPECT_EQ(1, TypeParam()) << "Expected failure";
-}
-
-typedef testing::Types<char, int> TypesForTestWithNames;
-
-template <typename T>
-class TypedTestWithNames : public testing::Test {};
-
-class TypedTestNames {
- public:
-  template <typename T>
-  static std::string GetName(int i) {
-    if (std::is_same<T, char>::value)
-      return std::string("char") + ::testing::PrintToString(i);
-    if (std::is_same<T, int>::value)
-      return std::string("int") + ::testing::PrintToString(i);
-  }
-};
-
-TYPED_TEST_SUITE(TypedTestWithNames, TypesForTestWithNames, TypedTestNames);
-
-TYPED_TEST(TypedTestWithNames, Success) {}
-
-TYPED_TEST(TypedTestWithNames, Failure) { FAIL(); }
-
-#endif  // GTEST_HAS_TYPED_TEST
-
-// This #ifdef block tests the output of type-parameterized tests.
-#if GTEST_HAS_TYPED_TEST_P
-
-template <typename T>
-class TypedTestP : public testing::Test {
-};
-
-TYPED_TEST_SUITE_P(TypedTestP);
-
-TYPED_TEST_P(TypedTestP, Success) {
-  EXPECT_EQ(0U, TypeParam());
-}
-
-TYPED_TEST_P(TypedTestP, Failure) {
-  EXPECT_EQ(1U, TypeParam()) << "Expected failure";
-}
-
-REGISTER_TYPED_TEST_SUITE_P(TypedTestP, Success, Failure);
-
-typedef testing::Types<unsigned char, unsigned int> UnsignedTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(Unsigned, TypedTestP, UnsignedTypes);
-
-class TypedTestPNames {
- public:
-  template <typename T>
-  static std::string GetName(int i) {
-    if (std::is_same<T, unsigned char>::value) {
-      return std::string("unsignedChar") + ::testing::PrintToString(i);
-    }
-    if (std::is_same<T, unsigned int>::value) {
-      return std::string("unsignedInt") + ::testing::PrintToString(i);
-    }
-  }
-};
-
-INSTANTIATE_TYPED_TEST_SUITE_P(UnsignedCustomName, TypedTestP, UnsignedTypes,
-                              TypedTestPNames);
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-
-#if GTEST_HAS_DEATH_TEST
-
-// We rely on the golden file to verify that tests whose test case
-// name ends with DeathTest are run first.
-
-TEST(ADeathTest, ShouldRunFirst) {
-}
-
-# if GTEST_HAS_TYPED_TEST
-
-// We rely on the golden file to verify that typed tests whose test
-// case name ends with DeathTest are run first.
-
-template <typename T>
-class ATypedDeathTest : public testing::Test {
-};
-
-typedef testing::Types<int, double> NumericTypes;
-TYPED_TEST_SUITE(ATypedDeathTest, NumericTypes);
-
-TYPED_TEST(ATypedDeathTest, ShouldRunFirst) {
-}
-
-# endif  // GTEST_HAS_TYPED_TEST
-
-# if GTEST_HAS_TYPED_TEST_P
-
-
-// We rely on the golden file to verify that type-parameterized tests
-// whose test case name ends with DeathTest are run first.
-
-template <typename T>
-class ATypeParamDeathTest : public testing::Test {
-};
-
-TYPED_TEST_SUITE_P(ATypeParamDeathTest);
-
-TYPED_TEST_P(ATypeParamDeathTest, ShouldRunFirst) {
-}
-
-REGISTER_TYPED_TEST_SUITE_P(ATypeParamDeathTest, ShouldRunFirst);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, ATypeParamDeathTest, NumericTypes);
-
-# endif  // GTEST_HAS_TYPED_TEST_P
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Tests various failure conditions of
-// EXPECT_{,NON}FATAL_FAILURE{,_ON_ALL_THREADS}.
-class ExpectFailureTest : public testing::Test {
- public:  // Must be public and not protected due to a bug in g++ 3.4.2.
-  enum FailureMode {
-    FATAL_FAILURE,
-    NONFATAL_FAILURE
-  };
-  static void AddFailure(FailureMode failure) {
-    if (failure == FATAL_FAILURE) {
-      FAIL() << "Expected fatal failure.";
-    } else {
-      ADD_FAILURE() << "Expected non-fatal failure.";
-    }
-  }
-};
-
-TEST_F(ExpectFailureTest, ExpectFatalFailure) {
-  // Expected fatal failure, but succeeds.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE(SUCCEED(), "Expected fatal failure.");
-  // Expected fatal failure, but got a non-fatal failure.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE(AddFailure(NONFATAL_FAILURE), "Expected non-fatal "
-                       "failure.");
-  // Wrong message.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE(AddFailure(FATAL_FAILURE), "Some other fatal failure "
-                       "expected.");
-}
-
-TEST_F(ExpectFailureTest, ExpectNonFatalFailure) {
-  // Expected non-fatal failure, but succeeds.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE(SUCCEED(), "Expected non-fatal failure.");
-  // Expected non-fatal failure, but got a fatal failure.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE(AddFailure(FATAL_FAILURE), "Expected fatal failure.");
-  // Wrong message.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE(AddFailure(NONFATAL_FAILURE), "Some other non-fatal "
-                          "failure.");
-}
-
-#if GTEST_IS_THREADSAFE
-
-class ExpectFailureWithThreadsTest : public ExpectFailureTest {
- protected:
-  static void AddFailureInOtherThread(FailureMode failure) {
-    ThreadWithParam<FailureMode> thread(&AddFailure, failure, nullptr);
-    thread.Join();
-  }
-};
-
-TEST_F(ExpectFailureWithThreadsTest, ExpectFatalFailure) {
-  // We only intercept the current thread.
-  printf("(expecting 2 failures)\n");
-  EXPECT_FATAL_FAILURE(AddFailureInOtherThread(FATAL_FAILURE),
-                       "Expected fatal failure.");
-}
-
-TEST_F(ExpectFailureWithThreadsTest, ExpectNonFatalFailure) {
-  // We only intercept the current thread.
-  printf("(expecting 2 failures)\n");
-  EXPECT_NONFATAL_FAILURE(AddFailureInOtherThread(NONFATAL_FAILURE),
-                          "Expected non-fatal failure.");
-}
-
-typedef ExpectFailureWithThreadsTest ScopedFakeTestPartResultReporterTest;
-
-// Tests that the ScopedFakeTestPartResultReporter only catches failures from
-// the current thread if it is instantiated with INTERCEPT_ONLY_CURRENT_THREAD.
-TEST_F(ScopedFakeTestPartResultReporterTest, InterceptOnlyCurrentThread) {
-  printf("(expecting 2 failures)\n");
-  TestPartResultArray results;
-  {
-    ScopedFakeTestPartResultReporter reporter(
-        ScopedFakeTestPartResultReporter::INTERCEPT_ONLY_CURRENT_THREAD,
-        &results);
-    AddFailureInOtherThread(FATAL_FAILURE);
-    AddFailureInOtherThread(NONFATAL_FAILURE);
-  }
-  // The two failures should not have been intercepted.
-  EXPECT_EQ(0, results.size()) << "This shouldn't fail.";
-}
-
-#endif  // GTEST_IS_THREADSAFE
-
-TEST_F(ExpectFailureTest, ExpectFatalFailureOnAllThreads) {
-  // Expected fatal failure, but succeeds.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(SUCCEED(), "Expected fatal failure.");
-  // Expected fatal failure, but got a non-fatal failure.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(AddFailure(NONFATAL_FAILURE),
-                                      "Expected non-fatal failure.");
-  // Wrong message.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(AddFailure(FATAL_FAILURE),
-                                      "Some other fatal failure expected.");
-}
-
-TEST_F(ExpectFailureTest, ExpectNonFatalFailureOnAllThreads) {
-  // Expected non-fatal failure, but succeeds.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(SUCCEED(), "Expected non-fatal "
-                                         "failure.");
-  // Expected non-fatal failure, but got a fatal failure.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(AddFailure(FATAL_FAILURE),
-                                         "Expected fatal failure.");
-  // Wrong message.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(AddFailure(NONFATAL_FAILURE),
-                                         "Some other non-fatal failure.");
-}
-
-class DynamicFixture : public testing::Test {
- protected:
-  DynamicFixture() { printf("DynamicFixture()\n"); }
-  ~DynamicFixture() override { printf("~DynamicFixture()\n"); }
-  void SetUp() override { printf("DynamicFixture::SetUp\n"); }
-  void TearDown() override { printf("DynamicFixture::TearDown\n"); }
-
-  static void SetUpTestSuite() { printf("DynamicFixture::SetUpTestSuite\n"); }
-  static void TearDownTestSuite() {
-    printf("DynamicFixture::TearDownTestSuite\n");
-  }
-};
-
-template <bool Pass>
-class DynamicTest : public DynamicFixture {
- public:
-  void TestBody() override { EXPECT_TRUE(Pass); }
-};
-
-auto dynamic_test = (
-    // Register two tests with the same fixture correctly.
-    testing::RegisterTest(
-        "DynamicFixture", "DynamicTestPass", nullptr, nullptr, __FILE__,
-        __LINE__, []() -> DynamicFixture* { return new DynamicTest<true>; }),
-    testing::RegisterTest(
-        "DynamicFixture", "DynamicTestFail", nullptr, nullptr, __FILE__,
-        __LINE__, []() -> DynamicFixture* { return new DynamicTest<false>; }),
-
-    // Register the same fixture with another name. That's fine.
-    testing::RegisterTest(
-        "DynamicFixtureAnotherName", "DynamicTestPass", nullptr, nullptr,
-        __FILE__, __LINE__,
-        []() -> DynamicFixture* { return new DynamicTest<true>; }),
-
-    // Register two tests with the same fixture incorrectly.
-    testing::RegisterTest(
-        "BadDynamicFixture1", "FixtureBase", nullptr, nullptr, __FILE__,
-        __LINE__, []() -> DynamicFixture* { return new DynamicTest<true>; }),
-    testing::RegisterTest(
-        "BadDynamicFixture1", "TestBase", nullptr, nullptr, __FILE__, __LINE__,
-        []() -> testing::Test* { return new DynamicTest<true>; }),
-
-    // Register two tests with the same fixture incorrectly by ommiting the
-    // return type.
-    testing::RegisterTest(
-        "BadDynamicFixture2", "FixtureBase", nullptr, nullptr, __FILE__,
-        __LINE__, []() -> DynamicFixture* { return new DynamicTest<true>; }),
-    testing::RegisterTest("BadDynamicFixture2", "Derived", nullptr, nullptr,
-                          __FILE__, __LINE__,
-                          []() { return new DynamicTest<true>; }));
-
-// Two test environments for testing testing::AddGlobalTestEnvironment().
-
-class FooEnvironment : public testing::Environment {
- public:
-  void SetUp() override { printf("%s", "FooEnvironment::SetUp() called.\n"); }
-
-  void TearDown() override {
-    printf("%s", "FooEnvironment::TearDown() called.\n");
-    FAIL() << "Expected fatal failure.";
-  }
-};
-
-class BarEnvironment : public testing::Environment {
- public:
-  void SetUp() override { printf("%s", "BarEnvironment::SetUp() called.\n"); }
-
-  void TearDown() override {
-    printf("%s", "BarEnvironment::TearDown() called.\n");
-    ADD_FAILURE() << "Expected non-fatal failure.";
-  }
-};
-
-// The main function.
-//
-// The idea is to use Google Test to run all the tests we have defined (some
-// of them are intended to fail), and then compare the test results
-// with the "golden" file.
-int main(int argc, char **argv) {
-  testing::GTEST_FLAG(print_time) = false;
-
-  // We just run the tests, knowing some of them are intended to fail.
-  // We will use a separate Python script to compare the output of
-  // this program with the golden file.
-
-  // It's hard to test InitGoogleTest() directly, as it has many
-  // global side effects.  The following line serves as a sanity test
-  // for it.
-  testing::InitGoogleTest(&argc, argv);
-  bool internal_skip_environment_and_ad_hoc_tests =
-      std::count(argv, argv + argc,
-                 std::string("internal_skip_environment_and_ad_hoc_tests")) > 0;
-
-#if GTEST_HAS_DEATH_TEST
-  if (testing::internal::GTEST_FLAG(internal_run_death_test) != "") {
-    // Skip the usual output capturing if we're running as the child
-    // process of an threadsafe-style death test.
-# if GTEST_OS_WINDOWS
-    posix::FReopen("nul:", "w", stdout);
-# else
-    posix::FReopen("/dev/null", "w", stdout);
-# endif  // GTEST_OS_WINDOWS
-    return RUN_ALL_TESTS();
-  }
-#endif  // GTEST_HAS_DEATH_TEST
-
-  if (internal_skip_environment_and_ad_hoc_tests)
-    return RUN_ALL_TESTS();
-
-  // Registers two global test environments.
-  // The golden file verifies that they are set up in the order they
-  // are registered, and torn down in the reverse order.
-  testing::AddGlobalTestEnvironment(new FooEnvironment);
-  testing::AddGlobalTestEnvironment(new BarEnvironment);
-#if _MSC_VER
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4127
-#endif  //  _MSC_VER
-  return RunAllTests();
-}
diff --git a/3rdparty/gtest/test/googletest-param-test-invalid-name1-test.py b/3rdparty/gtest/test/googletest-param-test-invalid-name1-test.py
deleted file mode 100644
index 2a08477a..00000000
--- a/3rdparty/gtest/test/googletest-param-test-invalid-name1-test.py
+++ /dev/null
@@ -1,63 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2015 Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test warns the user when not initialized properly."""
-
-import gtest_test_utils
-
-binary_name = 'googletest-param-test-invalid-name1-test_'
-COMMAND = gtest_test_utils.GetTestExecutablePath(binary_name)
-
-
-def Assert(condition):
-  if not condition:
-    raise AssertionError
-
-
-def TestExitCodeAndOutput(command):
-  """Runs the given command and verifies its exit code and output."""
-
-  err = ('Parameterized test name \'"InvalidWithQuotes"\' is invalid')
-
-  p = gtest_test_utils.Subprocess(command)
-  Assert(p.terminated_by_signal)
-
-  # Verify the output message contains appropriate output
-  Assert(err in p.output)
-
-
-class GTestParamTestInvalidName1Test(gtest_test_utils.TestCase):
-
-  def testExitCodeAndOutput(self):
-    TestExitCodeAndOutput(COMMAND)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-param-test-invalid-name1-test_.cc b/3rdparty/gtest/test/googletest-param-test-invalid-name1-test_.cc
deleted file mode 100644
index 955d6999..00000000
--- a/3rdparty/gtest/test/googletest-param-test-invalid-name1-test_.cc
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest.h"
-
-namespace {
-class DummyTest : public ::testing::TestWithParam<const char *> {};
-
-TEST_P(DummyTest, Dummy) {
-}
-
-INSTANTIATE_TEST_SUITE_P(InvalidTestName,
-                         DummyTest,
-                         ::testing::Values("InvalidWithQuotes"),
-                         ::testing::PrintToStringParamName());
-
-}  // namespace
-
-int main(int argc, char *argv[]) {
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-
diff --git a/3rdparty/gtest/test/googletest-param-test-invalid-name2-test.py b/3rdparty/gtest/test/googletest-param-test-invalid-name2-test.py
deleted file mode 100644
index ab838f46..00000000
--- a/3rdparty/gtest/test/googletest-param-test-invalid-name2-test.py
+++ /dev/null
@@ -1,62 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2015 Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test warns the user when not initialized properly."""
-
-import gtest_test_utils
-
-binary_name = 'googletest-param-test-invalid-name2-test_'
-COMMAND = gtest_test_utils.GetTestExecutablePath(binary_name)
-
-
-def Assert(condition):
-  if not condition:
-    raise AssertionError
-
-
-def TestExitCodeAndOutput(command):
-  """Runs the given command and verifies its exit code and output."""
-
-  err = ('Duplicate parameterized test name \'a\'')
-
-  p = gtest_test_utils.Subprocess(command)
-  Assert(p.terminated_by_signal)
-
-  # Check for appropriate output
-  Assert(err in p.output)
-
-
-class GTestParamTestInvalidName2Test(gtest_test_utils.TestCase):
-
-  def testExitCodeAndOutput(self):
-    TestExitCodeAndOutput(COMMAND)
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-param-test-invalid-name2-test_.cc b/3rdparty/gtest/test/googletest-param-test-invalid-name2-test_.cc
deleted file mode 100644
index 76371df5..00000000
--- a/3rdparty/gtest/test/googletest-param-test-invalid-name2-test_.cc
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest.h"
-
-namespace {
-class DummyTest : public ::testing::TestWithParam<const char *> {};
-
-std::string StringParamTestSuffix(
-    const testing::TestParamInfo<const char*>& info) {
-  return std::string(info.param);
-}
-
-TEST_P(DummyTest, Dummy) {
-}
-
-INSTANTIATE_TEST_SUITE_P(DuplicateTestNames,
-                         DummyTest,
-                         ::testing::Values("a", "b", "a", "c"),
-                         StringParamTestSuffix);
-}  // namespace
-
-int main(int argc, char *argv[]) {
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-
-
diff --git a/3rdparty/gtest/test/googletest-param-test-test.cc b/3rdparty/gtest/test/googletest-param-test-test.cc
deleted file mode 100644
index 6c187dff..00000000
--- a/3rdparty/gtest/test/googletest-param-test-test.cc
+++ /dev/null
@@ -1,1055 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself. This file verifies that the parameter
-// generators objects produce correct parameter sequences and that
-// Google Test runtime instantiates correct tests from those sequences.
-
-#include "gtest/gtest.h"
-
-# include <algorithm>
-# include <iostream>
-# include <list>
-# include <sstream>
-# include <string>
-# include <vector>
-
-# include "src/gtest-internal-inl.h"  // for UnitTestOptions
-# include "test/googletest-param-test-test.h"
-
-using ::std::vector;
-using ::std::sort;
-
-using ::testing::AddGlobalTestEnvironment;
-using ::testing::Bool;
-using ::testing::Combine;
-using ::testing::Message;
-using ::testing::Range;
-using ::testing::TestWithParam;
-using ::testing::Values;
-using ::testing::ValuesIn;
-
-using ::testing::internal::ParamGenerator;
-using ::testing::internal::UnitTestOptions;
-
-// Prints a value to a string.
-//
-// FIXME: remove PrintValue() when we move matchers and
-// EXPECT_THAT() from Google Mock to Google Test.  At that time, we
-// can write EXPECT_THAT(x, Eq(y)) to compare two tuples x and y, as
-// EXPECT_THAT() and the matchers know how to print tuples.
-template <typename T>
-::std::string PrintValue(const T& value) {
-  return testing::PrintToString(value);
-}
-
-// Verifies that a sequence generated by the generator and accessed
-// via the iterator object matches the expected one using Google Test
-// assertions.
-template <typename T, size_t N>
-void VerifyGenerator(const ParamGenerator<T>& generator,
-                     const T (&expected_values)[N]) {
-  typename ParamGenerator<T>::iterator it = generator.begin();
-  for (size_t i = 0; i < N; ++i) {
-    ASSERT_FALSE(it == generator.end())
-        << "At element " << i << " when accessing via an iterator "
-        << "created with the copy constructor.\n";
-    // We cannot use EXPECT_EQ() here as the values may be tuples,
-    // which don't support <<.
-    EXPECT_TRUE(expected_values[i] == *it)
-        << "where i is " << i
-        << ", expected_values[i] is " << PrintValue(expected_values[i])
-        << ", *it is " << PrintValue(*it)
-        << ", and 'it' is an iterator created with the copy constructor.\n";
-    ++it;
-  }
-  EXPECT_TRUE(it == generator.end())
-        << "At the presumed end of sequence when accessing via an iterator "
-        << "created with the copy constructor.\n";
-
-  // Test the iterator assignment. The following lines verify that
-  // the sequence accessed via an iterator initialized via the
-  // assignment operator (as opposed to a copy constructor) matches
-  // just the same.
-  it = generator.begin();
-  for (size_t i = 0; i < N; ++i) {
-    ASSERT_FALSE(it == generator.end())
-        << "At element " << i << " when accessing via an iterator "
-        << "created with the assignment operator.\n";
-    EXPECT_TRUE(expected_values[i] == *it)
-        << "where i is " << i
-        << ", expected_values[i] is " << PrintValue(expected_values[i])
-        << ", *it is " << PrintValue(*it)
-        << ", and 'it' is an iterator created with the copy constructor.\n";
-    ++it;
-  }
-  EXPECT_TRUE(it == generator.end())
-        << "At the presumed end of sequence when accessing via an iterator "
-        << "created with the assignment operator.\n";
-}
-
-template <typename T>
-void VerifyGeneratorIsEmpty(const ParamGenerator<T>& generator) {
-  typename ParamGenerator<T>::iterator it = generator.begin();
-  EXPECT_TRUE(it == generator.end());
-
-  it = generator.begin();
-  EXPECT_TRUE(it == generator.end());
-}
-
-// Generator tests. They test that each of the provided generator functions
-// generates an expected sequence of values. The general test pattern
-// instantiates a generator using one of the generator functions,
-// checks the sequence produced by the generator using its iterator API,
-// and then resets the iterator back to the beginning of the sequence
-// and checks the sequence again.
-
-// Tests that iterators produced by generator functions conform to the
-// ForwardIterator concept.
-TEST(IteratorTest, ParamIteratorConformsToForwardIteratorConcept) {
-  const ParamGenerator<int> gen = Range(0, 10);
-  ParamGenerator<int>::iterator it = gen.begin();
-
-  // Verifies that iterator initialization works as expected.
-  ParamGenerator<int>::iterator it2 = it;
-  EXPECT_TRUE(*it == *it2) << "Initialized iterators must point to the "
-                           << "element same as its source points to";
-
-  // Verifies that iterator assignment works as expected.
-  ++it;
-  EXPECT_FALSE(*it == *it2);
-  it2 = it;
-  EXPECT_TRUE(*it == *it2) << "Assigned iterators must point to the "
-                           << "element same as its source points to";
-
-  // Verifies that prefix operator++() returns *this.
-  EXPECT_EQ(&it, &(++it)) << "Result of the prefix operator++ must be "
-                          << "refer to the original object";
-
-  // Verifies that the result of the postfix operator++ points to the value
-  // pointed to by the original iterator.
-  int original_value = *it;  // Have to compute it outside of macro call to be
-                             // unaffected by the parameter evaluation order.
-  EXPECT_EQ(original_value, *(it++));
-
-  // Verifies that prefix and postfix operator++() advance an iterator
-  // all the same.
-  it2 = it;
-  ++it;
-  ++it2;
-  EXPECT_TRUE(*it == *it2);
-}
-
-// Tests that Range() generates the expected sequence.
-TEST(RangeTest, IntRangeWithDefaultStep) {
-  const ParamGenerator<int> gen = Range(0, 3);
-  const int expected_values[] = {0, 1, 2};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case. Tests that Range() generates the single element sequence
-// as expected when provided with range limits that are equal.
-TEST(RangeTest, IntRangeSingleValue) {
-  const ParamGenerator<int> gen = Range(0, 1);
-  const int expected_values[] = {0};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case. Tests that Range() with generates empty sequence when
-// supplied with an empty range.
-TEST(RangeTest, IntRangeEmpty) {
-  const ParamGenerator<int> gen = Range(0, 0);
-  VerifyGeneratorIsEmpty(gen);
-}
-
-// Tests that Range() with custom step (greater then one) generates
-// the expected sequence.
-TEST(RangeTest, IntRangeWithCustomStep) {
-  const ParamGenerator<int> gen = Range(0, 9, 3);
-  const int expected_values[] = {0, 3, 6};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Range() with custom step (greater then one) generates
-// the expected sequence when the last element does not fall on the
-// upper range limit. Sequences generated by Range() must not have
-// elements beyond the range limits.
-TEST(RangeTest, IntRangeWithCustomStepOverUpperBound) {
-  const ParamGenerator<int> gen = Range(0, 4, 3);
-  const int expected_values[] = {0, 3};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Verifies that Range works with user-defined types that define
-// copy constructor, operator=(), operator+(), and operator<().
-class DogAdder {
- public:
-  explicit DogAdder(const char* a_value) : value_(a_value) {}
-  DogAdder(const DogAdder& other) : value_(other.value_.c_str()) {}
-
-  DogAdder operator=(const DogAdder& other) {
-    if (this != &other)
-      value_ = other.value_;
-    return *this;
-  }
-  DogAdder operator+(const DogAdder& other) const {
-    Message msg;
-    msg << value_.c_str() << other.value_.c_str();
-    return DogAdder(msg.GetString().c_str());
-  }
-  bool operator<(const DogAdder& other) const {
-    return value_ < other.value_;
-  }
-  const std::string& value() const { return value_; }
-
- private:
-  std::string value_;
-};
-
-TEST(RangeTest, WorksWithACustomType) {
-  const ParamGenerator<DogAdder> gen =
-      Range(DogAdder("cat"), DogAdder("catdogdog"), DogAdder("dog"));
-  ParamGenerator<DogAdder>::iterator it = gen.begin();
-
-  ASSERT_FALSE(it == gen.end());
-  EXPECT_STREQ("cat", it->value().c_str());
-
-  ASSERT_FALSE(++it == gen.end());
-  EXPECT_STREQ("catdog", it->value().c_str());
-
-  EXPECT_TRUE(++it == gen.end());
-}
-
-class IntWrapper {
- public:
-  explicit IntWrapper(int a_value) : value_(a_value) {}
-  IntWrapper(const IntWrapper& other) : value_(other.value_) {}
-
-  IntWrapper operator=(const IntWrapper& other) {
-    value_ = other.value_;
-    return *this;
-  }
-  // operator+() adds a different type.
-  IntWrapper operator+(int other) const { return IntWrapper(value_ + other); }
-  bool operator<(const IntWrapper& other) const {
-    return value_ < other.value_;
-  }
-  int value() const { return value_; }
-
- private:
-  int value_;
-};
-
-TEST(RangeTest, WorksWithACustomTypeWithDifferentIncrementType) {
-  const ParamGenerator<IntWrapper> gen = Range(IntWrapper(0), IntWrapper(2));
-  ParamGenerator<IntWrapper>::iterator it = gen.begin();
-
-  ASSERT_FALSE(it == gen.end());
-  EXPECT_EQ(0, it->value());
-
-  ASSERT_FALSE(++it == gen.end());
-  EXPECT_EQ(1, it->value());
-
-  EXPECT_TRUE(++it == gen.end());
-}
-
-// Tests that ValuesIn() with an array parameter generates
-// the expected sequence.
-TEST(ValuesInTest, ValuesInArray) {
-  int array[] = {3, 5, 8};
-  const ParamGenerator<int> gen = ValuesIn(array);
-  VerifyGenerator(gen, array);
-}
-
-// Tests that ValuesIn() with a const array parameter generates
-// the expected sequence.
-TEST(ValuesInTest, ValuesInConstArray) {
-  const int array[] = {3, 5, 8};
-  const ParamGenerator<int> gen = ValuesIn(array);
-  VerifyGenerator(gen, array);
-}
-
-// Edge case. Tests that ValuesIn() with an array parameter containing a
-// single element generates the single element sequence.
-TEST(ValuesInTest, ValuesInSingleElementArray) {
-  int array[] = {42};
-  const ParamGenerator<int> gen = ValuesIn(array);
-  VerifyGenerator(gen, array);
-}
-
-// Tests that ValuesIn() generates the expected sequence for an STL
-// container (vector).
-TEST(ValuesInTest, ValuesInVector) {
-  typedef ::std::vector<int> ContainerType;
-  ContainerType values;
-  values.push_back(3);
-  values.push_back(5);
-  values.push_back(8);
-  const ParamGenerator<int> gen = ValuesIn(values);
-
-  const int expected_values[] = {3, 5, 8};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that ValuesIn() generates the expected sequence.
-TEST(ValuesInTest, ValuesInIteratorRange) {
-  typedef ::std::vector<int> ContainerType;
-  ContainerType values;
-  values.push_back(3);
-  values.push_back(5);
-  values.push_back(8);
-  const ParamGenerator<int> gen = ValuesIn(values.begin(), values.end());
-
-  const int expected_values[] = {3, 5, 8};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case. Tests that ValuesIn() provided with an iterator range specifying a
-// single value generates a single-element sequence.
-TEST(ValuesInTest, ValuesInSingleElementIteratorRange) {
-  typedef ::std::vector<int> ContainerType;
-  ContainerType values;
-  values.push_back(42);
-  const ParamGenerator<int> gen = ValuesIn(values.begin(), values.end());
-
-  const int expected_values[] = {42};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case. Tests that ValuesIn() provided with an empty iterator range
-// generates an empty sequence.
-TEST(ValuesInTest, ValuesInEmptyIteratorRange) {
-  typedef ::std::vector<int> ContainerType;
-  ContainerType values;
-  const ParamGenerator<int> gen = ValuesIn(values.begin(), values.end());
-
-  VerifyGeneratorIsEmpty(gen);
-}
-
-// Tests that the Values() generates the expected sequence.
-TEST(ValuesTest, ValuesWorks) {
-  const ParamGenerator<int> gen = Values(3, 5, 8);
-
-  const int expected_values[] = {3, 5, 8};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Values() generates the expected sequences from elements of
-// different types convertible to ParamGenerator's parameter type.
-TEST(ValuesTest, ValuesWorksForValuesOfCompatibleTypes) {
-  const ParamGenerator<double> gen = Values(3, 5.0f, 8.0);
-
-  const double expected_values[] = {3.0, 5.0, 8.0};
-  VerifyGenerator(gen, expected_values);
-}
-
-TEST(ValuesTest, ValuesWorksForMaxLengthList) {
-  const ParamGenerator<int> gen = Values(
-      10, 20, 30, 40, 50, 60, 70, 80, 90, 100,
-      110, 120, 130, 140, 150, 160, 170, 180, 190, 200,
-      210, 220, 230, 240, 250, 260, 270, 280, 290, 300,
-      310, 320, 330, 340, 350, 360, 370, 380, 390, 400,
-      410, 420, 430, 440, 450, 460, 470, 480, 490, 500);
-
-  const int expected_values[] = {
-      10, 20, 30, 40, 50, 60, 70, 80, 90, 100,
-      110, 120, 130, 140, 150, 160, 170, 180, 190, 200,
-      210, 220, 230, 240, 250, 260, 270, 280, 290, 300,
-      310, 320, 330, 340, 350, 360, 370, 380, 390, 400,
-      410, 420, 430, 440, 450, 460, 470, 480, 490, 500};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case test. Tests that single-parameter Values() generates the sequence
-// with the single value.
-TEST(ValuesTest, ValuesWithSingleParameter) {
-  const ParamGenerator<int> gen = Values(42);
-
-  const int expected_values[] = {42};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Bool() generates sequence (false, true).
-TEST(BoolTest, BoolWorks) {
-  const ParamGenerator<bool> gen = Bool();
-
-  const bool expected_values[] = {false, true};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Combine() with two parameters generates the expected sequence.
-TEST(CombineTest, CombineWithTwoParameters) {
-  const char* foo = "foo";
-  const char* bar = "bar";
-  const ParamGenerator<std::tuple<const char*, int> > gen =
-      Combine(Values(foo, bar), Values(3, 4));
-
-  std::tuple<const char*, int> expected_values[] = {
-      std::make_tuple(foo, 3), std::make_tuple(foo, 4), std::make_tuple(bar, 3),
-      std::make_tuple(bar, 4)};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Combine() with three parameters generates the expected sequence.
-TEST(CombineTest, CombineWithThreeParameters) {
-  const ParamGenerator<std::tuple<int, int, int> > gen =
-      Combine(Values(0, 1), Values(3, 4), Values(5, 6));
-  std::tuple<int, int, int> expected_values[] = {
-      std::make_tuple(0, 3, 5), std::make_tuple(0, 3, 6),
-      std::make_tuple(0, 4, 5), std::make_tuple(0, 4, 6),
-      std::make_tuple(1, 3, 5), std::make_tuple(1, 3, 6),
-      std::make_tuple(1, 4, 5), std::make_tuple(1, 4, 6)};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that the Combine() with the first parameter generating a single value
-// sequence generates a sequence with the number of elements equal to the
-// number of elements in the sequence generated by the second parameter.
-TEST(CombineTest, CombineWithFirstParameterSingleValue) {
-  const ParamGenerator<std::tuple<int, int> > gen =
-      Combine(Values(42), Values(0, 1));
-
-  std::tuple<int, int> expected_values[] = {std::make_tuple(42, 0),
-                                            std::make_tuple(42, 1)};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that the Combine() with the second parameter generating a single value
-// sequence generates a sequence with the number of elements equal to the
-// number of elements in the sequence generated by the first parameter.
-TEST(CombineTest, CombineWithSecondParameterSingleValue) {
-  const ParamGenerator<std::tuple<int, int> > gen =
-      Combine(Values(0, 1), Values(42));
-
-  std::tuple<int, int> expected_values[] = {std::make_tuple(0, 42),
-                                            std::make_tuple(1, 42)};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that when the first parameter produces an empty sequence,
-// Combine() produces an empty sequence, too.
-TEST(CombineTest, CombineWithFirstParameterEmptyRange) {
-  const ParamGenerator<std::tuple<int, int> > gen =
-      Combine(Range(0, 0), Values(0, 1));
-  VerifyGeneratorIsEmpty(gen);
-}
-
-// Tests that when the second parameter produces an empty sequence,
-// Combine() produces an empty sequence, too.
-TEST(CombineTest, CombineWithSecondParameterEmptyRange) {
-  const ParamGenerator<std::tuple<int, int> > gen =
-      Combine(Values(0, 1), Range(1, 1));
-  VerifyGeneratorIsEmpty(gen);
-}
-
-// Edge case. Tests that combine works with the maximum number
-// of parameters supported by Google Test (currently 10).
-TEST(CombineTest, CombineWithMaxNumberOfParameters) {
-  const char* foo = "foo";
-  const char* bar = "bar";
-  const ParamGenerator<
-      std::tuple<const char*, int, int, int, int, int, int, int, int, int> >
-      gen =
-          Combine(Values(foo, bar), Values(1), Values(2), Values(3), Values(4),
-                  Values(5), Values(6), Values(7), Values(8), Values(9));
-
-  std::tuple<const char*, int, int, int, int, int, int, int, int, int>
-      expected_values[] = {std::make_tuple(foo, 1, 2, 3, 4, 5, 6, 7, 8, 9),
-                           std::make_tuple(bar, 1, 2, 3, 4, 5, 6, 7, 8, 9)};
-  VerifyGenerator(gen, expected_values);
-}
-
-class NonDefaultConstructAssignString {
- public:
-  NonDefaultConstructAssignString(const std::string& s) : str_(s) {}
-
-  const std::string& str() const { return str_; }
-
- private:
-  std::string str_;
-
-  // Not default constructible
-  NonDefaultConstructAssignString();
-  // Not assignable
-  void operator=(const NonDefaultConstructAssignString&);
-};
-
-TEST(CombineTest, NonDefaultConstructAssign) {
-  const ParamGenerator<std::tuple<int, NonDefaultConstructAssignString> > gen =
-      Combine(Values(0, 1), Values(NonDefaultConstructAssignString("A"),
-                                   NonDefaultConstructAssignString("B")));
-
-  ParamGenerator<std::tuple<int, NonDefaultConstructAssignString> >::iterator
-      it = gen.begin();
-
-  EXPECT_EQ(0, std::get<0>(*it));
-  EXPECT_EQ("A", std::get<1>(*it).str());
-  ++it;
-
-  EXPECT_EQ(0, std::get<0>(*it));
-  EXPECT_EQ("B", std::get<1>(*it).str());
-  ++it;
-
-  EXPECT_EQ(1, std::get<0>(*it));
-  EXPECT_EQ("A", std::get<1>(*it).str());
-  ++it;
-
-  EXPECT_EQ(1, std::get<0>(*it));
-  EXPECT_EQ("B", std::get<1>(*it).str());
-  ++it;
-
-  EXPECT_TRUE(it == gen.end());
-}
-
-
-// Tests that an generator produces correct sequence after being
-// assigned from another generator.
-TEST(ParamGeneratorTest, AssignmentWorks) {
-  ParamGenerator<int> gen = Values(1, 2);
-  const ParamGenerator<int> gen2 = Values(3, 4);
-  gen = gen2;
-
-  const int expected_values[] = {3, 4};
-  VerifyGenerator(gen, expected_values);
-}
-
-// This test verifies that the tests are expanded and run as specified:
-// one test per element from the sequence produced by the generator
-// specified in INSTANTIATE_TEST_SUITE_P. It also verifies that the test's
-// fixture constructor, SetUp(), and TearDown() have run and have been
-// supplied with the correct parameters.
-
-// The use of environment object allows detection of the case where no test
-// case functionality is run at all. In this case TearDownTestSuite will not
-// be able to detect missing tests, naturally.
-template <int kExpectedCalls>
-class TestGenerationEnvironment : public ::testing::Environment {
- public:
-  static TestGenerationEnvironment* Instance() {
-    static TestGenerationEnvironment* instance = new TestGenerationEnvironment;
-    return instance;
-  }
-
-  void FixtureConstructorExecuted() { fixture_constructor_count_++; }
-  void SetUpExecuted() { set_up_count_++; }
-  void TearDownExecuted() { tear_down_count_++; }
-  void TestBodyExecuted() { test_body_count_++; }
-
-  void TearDown() override {
-    // If all MultipleTestGenerationTest tests have been de-selected
-    // by the filter flag, the following checks make no sense.
-    bool perform_check = false;
-
-    for (int i = 0; i < kExpectedCalls; ++i) {
-      Message msg;
-      msg << "TestsExpandedAndRun/" << i;
-      if (UnitTestOptions::FilterMatchesTest(
-             "TestExpansionModule/MultipleTestGenerationTest",
-              msg.GetString().c_str())) {
-        perform_check = true;
-      }
-    }
-    if (perform_check) {
-      EXPECT_EQ(kExpectedCalls, fixture_constructor_count_)
-          << "Fixture constructor of ParamTestGenerationTest test case "
-          << "has not been run as expected.";
-      EXPECT_EQ(kExpectedCalls, set_up_count_)
-          << "Fixture SetUp method of ParamTestGenerationTest test case "
-          << "has not been run as expected.";
-      EXPECT_EQ(kExpectedCalls, tear_down_count_)
-          << "Fixture TearDown method of ParamTestGenerationTest test case "
-          << "has not been run as expected.";
-      EXPECT_EQ(kExpectedCalls, test_body_count_)
-          << "Test in ParamTestGenerationTest test case "
-          << "has not been run as expected.";
-    }
-  }
-
- private:
-  TestGenerationEnvironment() : fixture_constructor_count_(0), set_up_count_(0),
-                                tear_down_count_(0), test_body_count_(0) {}
-
-  int fixture_constructor_count_;
-  int set_up_count_;
-  int tear_down_count_;
-  int test_body_count_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestGenerationEnvironment);
-};
-
-const int test_generation_params[] = {36, 42, 72};
-
-class TestGenerationTest : public TestWithParam<int> {
- public:
-  enum {
-    PARAMETER_COUNT =
-        sizeof(test_generation_params)/sizeof(test_generation_params[0])
-  };
-
-  typedef TestGenerationEnvironment<PARAMETER_COUNT> Environment;
-
-  TestGenerationTest() {
-    Environment::Instance()->FixtureConstructorExecuted();
-    current_parameter_ = GetParam();
-  }
-  void SetUp() override {
-    Environment::Instance()->SetUpExecuted();
-    EXPECT_EQ(current_parameter_, GetParam());
-  }
-  void TearDown() override {
-    Environment::Instance()->TearDownExecuted();
-    EXPECT_EQ(current_parameter_, GetParam());
-  }
-
-  static void SetUpTestSuite() {
-    bool all_tests_in_test_case_selected = true;
-
-    for (int i = 0; i < PARAMETER_COUNT; ++i) {
-      Message test_name;
-      test_name << "TestsExpandedAndRun/" << i;
-      if ( !UnitTestOptions::FilterMatchesTest(
-                "TestExpansionModule/MultipleTestGenerationTest",
-                test_name.GetString())) {
-        all_tests_in_test_case_selected = false;
-      }
-    }
-    EXPECT_TRUE(all_tests_in_test_case_selected)
-        << "When running the TestGenerationTest test case all of its tests\n"
-        << "must be selected by the filter flag for the test case to pass.\n"
-        << "If not all of them are enabled, we can't reliably conclude\n"
-        << "that the correct number of tests have been generated.";
-
-    collected_parameters_.clear();
-  }
-
-  static void TearDownTestSuite() {
-    vector<int> expected_values(test_generation_params,
-                                test_generation_params + PARAMETER_COUNT);
-    // Test execution order is not guaranteed by Google Test,
-    // so the order of values in collected_parameters_ can be
-    // different and we have to sort to compare.
-    sort(expected_values.begin(), expected_values.end());
-    sort(collected_parameters_.begin(), collected_parameters_.end());
-
-    EXPECT_TRUE(collected_parameters_ == expected_values);
-  }
-
- protected:
-  int current_parameter_;
-  static vector<int> collected_parameters_;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestGenerationTest);
-};
-vector<int> TestGenerationTest::collected_parameters_;
-
-TEST_P(TestGenerationTest, TestsExpandedAndRun) {
-  Environment::Instance()->TestBodyExecuted();
-  EXPECT_EQ(current_parameter_, GetParam());
-  collected_parameters_.push_back(GetParam());
-}
-INSTANTIATE_TEST_SUITE_P(TestExpansionModule, TestGenerationTest,
-                         ValuesIn(test_generation_params));
-
-// This test verifies that the element sequence (third parameter of
-// INSTANTIATE_TEST_SUITE_P) is evaluated in InitGoogleTest() and neither at
-// the call site of INSTANTIATE_TEST_SUITE_P nor in RUN_ALL_TESTS().  For
-// that, we declare param_value_ to be a static member of
-// GeneratorEvaluationTest and initialize it to 0.  We set it to 1 in
-// main(), just before invocation of InitGoogleTest().  After calling
-// InitGoogleTest(), we set the value to 2.  If the sequence is evaluated
-// before or after InitGoogleTest, INSTANTIATE_TEST_SUITE_P will create a
-// test with parameter other than 1, and the test body will fail the
-// assertion.
-class GeneratorEvaluationTest : public TestWithParam<int> {
- public:
-  static int param_value() { return param_value_; }
-  static void set_param_value(int param_value) { param_value_ = param_value; }
-
- private:
-  static int param_value_;
-};
-int GeneratorEvaluationTest::param_value_ = 0;
-
-TEST_P(GeneratorEvaluationTest, GeneratorsEvaluatedInMain) {
-  EXPECT_EQ(1, GetParam());
-}
-INSTANTIATE_TEST_SUITE_P(GenEvalModule, GeneratorEvaluationTest,
-                         Values(GeneratorEvaluationTest::param_value()));
-
-// Tests that generators defined in a different translation unit are
-// functional. Generator extern_gen is defined in gtest-param-test_test2.cc.
-extern ParamGenerator<int> extern_gen;
-class ExternalGeneratorTest : public TestWithParam<int> {};
-TEST_P(ExternalGeneratorTest, ExternalGenerator) {
-  // Sequence produced by extern_gen contains only a single value
-  // which we verify here.
-  EXPECT_EQ(GetParam(), 33);
-}
-INSTANTIATE_TEST_SUITE_P(ExternalGeneratorModule, ExternalGeneratorTest,
-                         extern_gen);
-
-// Tests that a parameterized test case can be defined in one translation
-// unit and instantiated in another. This test will be instantiated in
-// gtest-param-test_test2.cc. ExternalInstantiationTest fixture class is
-// defined in gtest-param-test_test.h.
-TEST_P(ExternalInstantiationTest, IsMultipleOf33) {
-  EXPECT_EQ(0, GetParam() % 33);
-}
-
-// Tests that a parameterized test case can be instantiated with multiple
-// generators.
-class MultipleInstantiationTest : public TestWithParam<int> {};
-TEST_P(MultipleInstantiationTest, AllowsMultipleInstances) {
-}
-INSTANTIATE_TEST_SUITE_P(Sequence1, MultipleInstantiationTest, Values(1, 2));
-INSTANTIATE_TEST_SUITE_P(Sequence2, MultipleInstantiationTest, Range(3, 5));
-
-// Tests that a parameterized test case can be instantiated
-// in multiple translation units. This test will be instantiated
-// here and in gtest-param-test_test2.cc.
-// InstantiationInMultipleTranslationUnitsTest fixture class
-// is defined in gtest-param-test_test.h.
-TEST_P(InstantiationInMultipleTranslationUnitsTest, IsMultipleOf42) {
-  EXPECT_EQ(0, GetParam() % 42);
-}
-INSTANTIATE_TEST_SUITE_P(Sequence1, InstantiationInMultipleTranslationUnitsTest,
-                         Values(42, 42 * 2));
-
-// Tests that each iteration of parameterized test runs in a separate test
-// object.
-class SeparateInstanceTest : public TestWithParam<int> {
- public:
-  SeparateInstanceTest() : count_(0) {}
-
-  static void TearDownTestSuite() {
-    EXPECT_GE(global_count_, 2)
-        << "If some (but not all) SeparateInstanceTest tests have been "
-        << "filtered out this test will fail. Make sure that all "
-        << "GeneratorEvaluationTest are selected or de-selected together "
-        << "by the test filter.";
-  }
-
- protected:
-  int count_;
-  static int global_count_;
-};
-int SeparateInstanceTest::global_count_ = 0;
-
-TEST_P(SeparateInstanceTest, TestsRunInSeparateInstances) {
-  EXPECT_EQ(0, count_++);
-  global_count_++;
-}
-INSTANTIATE_TEST_SUITE_P(FourElemSequence, SeparateInstanceTest, Range(1, 4));
-
-// Tests that all instantiations of a test have named appropriately. Test
-// defined with TEST_P(TestSuiteName, TestName) and instantiated with
-// INSTANTIATE_TEST_SUITE_P(SequenceName, TestSuiteName, generator) must be
-// named SequenceName/TestSuiteName.TestName/i, where i is the 0-based index of
-// the sequence element used to instantiate the test.
-class NamingTest : public TestWithParam<int> {};
-
-TEST_P(NamingTest, TestsReportCorrectNamesAndParameters) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-
-  EXPECT_STREQ("ZeroToFiveSequence/NamingTest", test_info->test_suite_name());
-
-  Message index_stream;
-  index_stream << "TestsReportCorrectNamesAndParameters/" << GetParam();
-  EXPECT_STREQ(index_stream.GetString().c_str(), test_info->name());
-
-  EXPECT_EQ(::testing::PrintToString(GetParam()), test_info->value_param());
-}
-
-INSTANTIATE_TEST_SUITE_P(ZeroToFiveSequence, NamingTest, Range(0, 5));
-
-// Tests that macros in test names are expanded correctly.
-class MacroNamingTest : public TestWithParam<int> {};
-
-#define PREFIX_WITH_FOO(test_name) Foo##test_name
-#define PREFIX_WITH_MACRO(test_name) Macro##test_name
-
-TEST_P(PREFIX_WITH_MACRO(NamingTest), PREFIX_WITH_FOO(SomeTestName)) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-
-  EXPECT_STREQ("FortyTwo/MacroNamingTest", test_info->test_suite_name());
-  EXPECT_STREQ("FooSomeTestName", test_info->name());
-}
-
-INSTANTIATE_TEST_SUITE_P(FortyTwo, MacroNamingTest, Values(42));
-
-// Tests the same thing for non-parametrized tests.
-class MacroNamingTestNonParametrized : public ::testing::Test {};
-
-TEST_F(PREFIX_WITH_MACRO(NamingTestNonParametrized),
-       PREFIX_WITH_FOO(SomeTestName)) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-
-  EXPECT_STREQ("MacroNamingTestNonParametrized", test_info->test_suite_name());
-  EXPECT_STREQ("FooSomeTestName", test_info->name());
-}
-
-// Tests that user supplied custom parameter names are working correctly.
-// Runs the test with a builtin helper method which uses PrintToString,
-// as well as a custom function and custom functor to ensure all possible
-// uses work correctly.
-class CustomFunctorNamingTest : public TestWithParam<std::string> {};
-TEST_P(CustomFunctorNamingTest, CustomTestNames) {}
-
-struct CustomParamNameFunctor {
-  std::string operator()(const ::testing::TestParamInfo<std::string>& inf) {
-    return inf.param;
-  }
-};
-
-INSTANTIATE_TEST_SUITE_P(CustomParamNameFunctor, CustomFunctorNamingTest,
-                         Values(std::string("FunctorName")),
-                         CustomParamNameFunctor());
-
-INSTANTIATE_TEST_SUITE_P(AllAllowedCharacters, CustomFunctorNamingTest,
-                         Values("abcdefghijklmnopqrstuvwxyz",
-                                "ABCDEFGHIJKLMNOPQRSTUVWXYZ", "01234567890_"),
-                         CustomParamNameFunctor());
-
-inline std::string CustomParamNameFunction(
-    const ::testing::TestParamInfo<std::string>& inf) {
-  return inf.param;
-}
-
-class CustomFunctionNamingTest : public TestWithParam<std::string> {};
-TEST_P(CustomFunctionNamingTest, CustomTestNames) {}
-
-INSTANTIATE_TEST_SUITE_P(CustomParamNameFunction, CustomFunctionNamingTest,
-                         Values(std::string("FunctionName")),
-                         CustomParamNameFunction);
-
-INSTANTIATE_TEST_SUITE_P(CustomParamNameFunctionP, CustomFunctionNamingTest,
-                         Values(std::string("FunctionNameP")),
-                         &CustomParamNameFunction);
-
-// Test custom naming with a lambda
-
-class CustomLambdaNamingTest : public TestWithParam<std::string> {};
-TEST_P(CustomLambdaNamingTest, CustomTestNames) {}
-
-INSTANTIATE_TEST_SUITE_P(CustomParamNameLambda, CustomLambdaNamingTest,
-                         Values(std::string("LambdaName")),
-                         [](const ::testing::TestParamInfo<std::string>& inf) {
-                           return inf.param;
-                         });
-
-TEST(CustomNamingTest, CheckNameRegistry) {
-  ::testing::UnitTest* unit_test = ::testing::UnitTest::GetInstance();
-  std::set<std::string> test_names;
-  for (int suite_num = 0; suite_num < unit_test->total_test_suite_count();
-       ++suite_num) {
-    const ::testing::TestSuite* test_suite = unit_test->GetTestSuite(suite_num);
-    for (int test_num = 0; test_num < test_suite->total_test_count();
-         ++test_num) {
-      const ::testing::TestInfo* test_info = test_suite->GetTestInfo(test_num);
-      test_names.insert(std::string(test_info->name()));
-    }
-  }
-  EXPECT_EQ(1u, test_names.count("CustomTestNames/FunctorName"));
-  EXPECT_EQ(1u, test_names.count("CustomTestNames/FunctionName"));
-  EXPECT_EQ(1u, test_names.count("CustomTestNames/FunctionNameP"));
-  EXPECT_EQ(1u, test_names.count("CustomTestNames/LambdaName"));
-}
-
-// Test a numeric name to ensure PrintToStringParamName works correctly.
-
-class CustomIntegerNamingTest : public TestWithParam<int> {};
-
-TEST_P(CustomIntegerNamingTest, TestsReportCorrectNames) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-  Message test_name_stream;
-  test_name_stream << "TestsReportCorrectNames/" << GetParam();
-  EXPECT_STREQ(test_name_stream.GetString().c_str(), test_info->name());
-}
-
-INSTANTIATE_TEST_SUITE_P(PrintToString, CustomIntegerNamingTest, Range(0, 5),
-                         ::testing::PrintToStringParamName());
-
-// Test a custom struct with PrintToString.
-
-struct CustomStruct {
-  explicit CustomStruct(int value) : x(value) {}
-  int x;
-};
-
-std::ostream& operator<<(std::ostream& stream, const CustomStruct& val) {
-  stream << val.x;
-  return stream;
-}
-
-class CustomStructNamingTest : public TestWithParam<CustomStruct> {};
-
-TEST_P(CustomStructNamingTest, TestsReportCorrectNames) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-  Message test_name_stream;
-  test_name_stream << "TestsReportCorrectNames/" << GetParam();
-  EXPECT_STREQ(test_name_stream.GetString().c_str(), test_info->name());
-}
-
-INSTANTIATE_TEST_SUITE_P(PrintToString, CustomStructNamingTest,
-                         Values(CustomStruct(0), CustomStruct(1)),
-                         ::testing::PrintToStringParamName());
-
-// Test that using a stateful parameter naming function works as expected.
-
-struct StatefulNamingFunctor {
-  StatefulNamingFunctor() : sum(0) {}
-  std::string operator()(const ::testing::TestParamInfo<int>& info) {
-    int value = info.param + sum;
-    sum += info.param;
-    return ::testing::PrintToString(value);
-  }
-  int sum;
-};
-
-class StatefulNamingTest : public ::testing::TestWithParam<int> {
- protected:
-  StatefulNamingTest() : sum_(0) {}
-  int sum_;
-};
-
-TEST_P(StatefulNamingTest, TestsReportCorrectNames) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-  sum_ += GetParam();
-  Message test_name_stream;
-  test_name_stream << "TestsReportCorrectNames/" << sum_;
-  EXPECT_STREQ(test_name_stream.GetString().c_str(), test_info->name());
-}
-
-INSTANTIATE_TEST_SUITE_P(StatefulNamingFunctor, StatefulNamingTest, Range(0, 5),
-                         StatefulNamingFunctor());
-
-// Class that cannot be streamed into an ostream.  It needs to be copyable
-// (and, in case of MSVC, also assignable) in order to be a test parameter
-// type.  Its default copy constructor and assignment operator do exactly
-// what we need.
-class Unstreamable {
- public:
-  explicit Unstreamable(int value) : value_(value) {}
-  // -Wunused-private-field: dummy accessor for `value_`.
-  const int& dummy_value() const { return value_; }
-
- private:
-  int value_;
-};
-
-class CommentTest : public TestWithParam<Unstreamable> {};
-
-TEST_P(CommentTest, TestsCorrectlyReportUnstreamableParams) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-
-  EXPECT_EQ(::testing::PrintToString(GetParam()), test_info->value_param());
-}
-
-INSTANTIATE_TEST_SUITE_P(InstantiationWithComments, CommentTest,
-                         Values(Unstreamable(1)));
-
-// Verify that we can create a hierarchy of test fixtures, where the base
-// class fixture is not parameterized and the derived class is. In this case
-// ParameterizedDerivedTest inherits from NonParameterizedBaseTest.  We
-// perform simple tests on both.
-class NonParameterizedBaseTest : public ::testing::Test {
- public:
-  NonParameterizedBaseTest() : n_(17) { }
- protected:
-  int n_;
-};
-
-class ParameterizedDerivedTest : public NonParameterizedBaseTest,
-                                 public ::testing::WithParamInterface<int> {
- protected:
-  ParameterizedDerivedTest() : count_(0) { }
-  int count_;
-  static int global_count_;
-};
-
-int ParameterizedDerivedTest::global_count_ = 0;
-
-TEST_F(NonParameterizedBaseTest, FixtureIsInitialized) {
-  EXPECT_EQ(17, n_);
-}
-
-TEST_P(ParameterizedDerivedTest, SeesSequence) {
-  EXPECT_EQ(17, n_);
-  EXPECT_EQ(0, count_++);
-  EXPECT_EQ(GetParam(), global_count_++);
-}
-
-class ParameterizedDeathTest : public ::testing::TestWithParam<int> { };
-
-TEST_F(ParameterizedDeathTest, GetParamDiesFromTestF) {
-  EXPECT_DEATH_IF_SUPPORTED(GetParam(),
-                            ".* value-parameterized test .*");
-}
-
-INSTANTIATE_TEST_SUITE_P(RangeZeroToFive, ParameterizedDerivedTest,
-                         Range(0, 5));
-
-// Tests param generator working with Enums
-enum MyEnums {
-  ENUM1 = 1,
-  ENUM2 = 3,
-  ENUM3 = 8,
-};
-
-class MyEnumTest : public testing::TestWithParam<MyEnums> {};
-
-TEST_P(MyEnumTest, ChecksParamMoreThanZero) { EXPECT_GE(10, GetParam()); }
-INSTANTIATE_TEST_SUITE_P(MyEnumTests, MyEnumTest,
-                         ::testing::Values(ENUM1, ENUM2, 0));
-
-int main(int argc, char **argv) {
-  // Used in TestGenerationTest test suite.
-  AddGlobalTestEnvironment(TestGenerationTest::Environment::Instance());
-  // Used in GeneratorEvaluationTest test suite. Tests that the updated value
-  // will be picked up for instantiating tests in GeneratorEvaluationTest.
-  GeneratorEvaluationTest::set_param_value(1);
-
-  ::testing::InitGoogleTest(&argc, argv);
-
-  // Used in GeneratorEvaluationTest test suite. Tests that value updated
-  // here will NOT be used for instantiating tests in
-  // GeneratorEvaluationTest.
-  GeneratorEvaluationTest::set_param_value(2);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-param-test-test.h b/3rdparty/gtest/test/googletest-param-test-test.h
deleted file mode 100644
index 64805701..00000000
--- a/3rdparty/gtest/test/googletest-param-test-test.h
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file provides classes and functions used internally
-// for testing Google Test itself.
-
-#ifndef GTEST_TEST_GTEST_PARAM_TEST_TEST_H_
-#define GTEST_TEST_GTEST_PARAM_TEST_TEST_H_
-
-#include "gtest/gtest.h"
-
-// Test fixture for testing definition and instantiation of a test
-// in separate translation units.
-class ExternalInstantiationTest : public ::testing::TestWithParam<int> {
-};
-
-// Test fixture for testing instantiation of a test in multiple
-// translation units.
-class InstantiationInMultipleTranslationUnitsTest
-    : public ::testing::TestWithParam<int> {
-};
-
-#endif  // GTEST_TEST_GTEST_PARAM_TEST_TEST_H_
diff --git a/3rdparty/gtest/test/googletest-param-test2-test.cc b/3rdparty/gtest/test/googletest-param-test2-test.cc
deleted file mode 100644
index 2a29fb1d..00000000
--- a/3rdparty/gtest/test/googletest-param-test2-test.cc
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself.  This verifies that the basic constructs of
-// Google Test work.
-
-#include "gtest/gtest.h"
-#include "test/googletest-param-test-test.h"
-
-using ::testing::Values;
-using ::testing::internal::ParamGenerator;
-
-// Tests that generators defined in a different translation unit
-// are functional. The test using extern_gen is defined
-// in googletest-param-test-test.cc.
-ParamGenerator<int> extern_gen = Values(33);
-
-// Tests that a parameterized test case can be defined in one translation unit
-// and instantiated in another. The test is defined in
-// googletest-param-test-test.cc and ExternalInstantiationTest fixture class is
-// defined in gtest-param-test_test.h.
-INSTANTIATE_TEST_SUITE_P(MultiplesOf33,
-                         ExternalInstantiationTest,
-                         Values(33, 66));
-
-// Tests that a parameterized test case can be instantiated
-// in multiple translation units. Another instantiation is defined
-// in googletest-param-test-test.cc and
-// InstantiationInMultipleTranslationUnitsTest fixture is defined in
-// gtest-param-test_test.h
-INSTANTIATE_TEST_SUITE_P(Sequence2,
-                         InstantiationInMultipleTranslationUnitsTest,
-                         Values(42*3, 42*4, 42*5));
-
diff --git a/3rdparty/gtest/test/googletest-port-test.cc b/3rdparty/gtest/test/googletest-port-test.cc
deleted file mode 100644
index 60d637c3..00000000
--- a/3rdparty/gtest/test/googletest-port-test.cc
+++ /dev/null
@@ -1,1272 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// This file tests the internal cross-platform support utilities.
-#include <stdio.h>
-
-#include "gtest/internal/gtest-port.h"
-
-#if GTEST_OS_MAC
-# include <time.h>
-#endif  // GTEST_OS_MAC
-
-#include <list>
-#include <memory>
-#include <utility>  // For std::pair and std::make_pair.
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-#include "src/gtest-internal-inl.h"
-
-using std::make_pair;
-using std::pair;
-
-namespace testing {
-namespace internal {
-
-TEST(IsXDigitTest, WorksForNarrowAscii) {
-  EXPECT_TRUE(IsXDigit('0'));
-  EXPECT_TRUE(IsXDigit('9'));
-  EXPECT_TRUE(IsXDigit('A'));
-  EXPECT_TRUE(IsXDigit('F'));
-  EXPECT_TRUE(IsXDigit('a'));
-  EXPECT_TRUE(IsXDigit('f'));
-
-  EXPECT_FALSE(IsXDigit('-'));
-  EXPECT_FALSE(IsXDigit('g'));
-  EXPECT_FALSE(IsXDigit('G'));
-}
-
-TEST(IsXDigitTest, ReturnsFalseForNarrowNonAscii) {
-  EXPECT_FALSE(IsXDigit(static_cast<char>('\x80')));
-  EXPECT_FALSE(IsXDigit(static_cast<char>('0' | '\x80')));
-}
-
-TEST(IsXDigitTest, WorksForWideAscii) {
-  EXPECT_TRUE(IsXDigit(L'0'));
-  EXPECT_TRUE(IsXDigit(L'9'));
-  EXPECT_TRUE(IsXDigit(L'A'));
-  EXPECT_TRUE(IsXDigit(L'F'));
-  EXPECT_TRUE(IsXDigit(L'a'));
-  EXPECT_TRUE(IsXDigit(L'f'));
-
-  EXPECT_FALSE(IsXDigit(L'-'));
-  EXPECT_FALSE(IsXDigit(L'g'));
-  EXPECT_FALSE(IsXDigit(L'G'));
-}
-
-TEST(IsXDigitTest, ReturnsFalseForWideNonAscii) {
-  EXPECT_FALSE(IsXDigit(static_cast<wchar_t>(0x80)));
-  EXPECT_FALSE(IsXDigit(static_cast<wchar_t>(L'0' | 0x80)));
-  EXPECT_FALSE(IsXDigit(static_cast<wchar_t>(L'0' | 0x100)));
-}
-
-class Base {
- public:
-  // Copy constructor and assignment operator do exactly what we need, so we
-  // use them.
-  Base() : member_(0) {}
-  explicit Base(int n) : member_(n) {}
-  virtual ~Base() {}
-  int member() { return member_; }
-
- private:
-  int member_;
-};
-
-class Derived : public Base {
- public:
-  explicit Derived(int n) : Base(n) {}
-};
-
-TEST(ImplicitCastTest, ConvertsPointers) {
-  Derived derived(0);
-  EXPECT_TRUE(&derived == ::testing::internal::ImplicitCast_<Base*>(&derived));
-}
-
-TEST(ImplicitCastTest, CanUseInheritance) {
-  Derived derived(1);
-  Base base = ::testing::internal::ImplicitCast_<Base>(derived);
-  EXPECT_EQ(derived.member(), base.member());
-}
-
-class Castable {
- public:
-  explicit Castable(bool* converted) : converted_(converted) {}
-  operator Base() {
-    *converted_ = true;
-    return Base();
-  }
-
- private:
-  bool* converted_;
-};
-
-TEST(ImplicitCastTest, CanUseNonConstCastOperator) {
-  bool converted = false;
-  Castable castable(&converted);
-  Base base = ::testing::internal::ImplicitCast_<Base>(castable);
-  EXPECT_TRUE(converted);
-}
-
-class ConstCastable {
- public:
-  explicit ConstCastable(bool* converted) : converted_(converted) {}
-  operator Base() const {
-    *converted_ = true;
-    return Base();
-  }
-
- private:
-  bool* converted_;
-};
-
-TEST(ImplicitCastTest, CanUseConstCastOperatorOnConstValues) {
-  bool converted = false;
-  const ConstCastable const_castable(&converted);
-  Base base = ::testing::internal::ImplicitCast_<Base>(const_castable);
-  EXPECT_TRUE(converted);
-}
-
-class ConstAndNonConstCastable {
- public:
-  ConstAndNonConstCastable(bool* converted, bool* const_converted)
-      : converted_(converted), const_converted_(const_converted) {}
-  operator Base() {
-    *converted_ = true;
-    return Base();
-  }
-  operator Base() const {
-    *const_converted_ = true;
-    return Base();
-  }
-
- private:
-  bool* converted_;
-  bool* const_converted_;
-};
-
-TEST(ImplicitCastTest, CanSelectBetweenConstAndNonConstCasrAppropriately) {
-  bool converted = false;
-  bool const_converted = false;
-  ConstAndNonConstCastable castable(&converted, &const_converted);
-  Base base = ::testing::internal::ImplicitCast_<Base>(castable);
-  EXPECT_TRUE(converted);
-  EXPECT_FALSE(const_converted);
-
-  converted = false;
-  const_converted = false;
-  const ConstAndNonConstCastable const_castable(&converted, &const_converted);
-  base = ::testing::internal::ImplicitCast_<Base>(const_castable);
-  EXPECT_FALSE(converted);
-  EXPECT_TRUE(const_converted);
-}
-
-class To {
- public:
-  To(bool* converted) { *converted = true; }  // NOLINT
-};
-
-TEST(ImplicitCastTest, CanUseImplicitConstructor) {
-  bool converted = false;
-  To to = ::testing::internal::ImplicitCast_<To>(&converted);
-  (void)to;
-  EXPECT_TRUE(converted);
-}
-
-TEST(GtestCheckSyntaxTest, BehavesLikeASingleStatement) {
-  if (AlwaysFalse())
-    GTEST_CHECK_(false) << "This should never be executed; "
-                           "It's a compilation test only.";
-
-  if (AlwaysTrue())
-    GTEST_CHECK_(true);
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ;  // NOLINT
-  else
-    GTEST_CHECK_(true) << "";
-}
-
-TEST(GtestCheckSyntaxTest, WorksWithSwitch) {
-  switch (0) {
-    case 1:
-      break;
-    default:
-      GTEST_CHECK_(true);
-  }
-
-  switch (0)
-    case 0:
-      GTEST_CHECK_(true) << "Check failed in switch case";
-}
-
-// Verifies behavior of FormatFileLocation.
-TEST(FormatFileLocationTest, FormatsFileLocation) {
-  EXPECT_PRED_FORMAT2(IsSubstring, "foo.cc", FormatFileLocation("foo.cc", 42));
-  EXPECT_PRED_FORMAT2(IsSubstring, "42", FormatFileLocation("foo.cc", 42));
-}
-
-TEST(FormatFileLocationTest, FormatsUnknownFile) {
-  EXPECT_PRED_FORMAT2(IsSubstring, "unknown file",
-                      FormatFileLocation(nullptr, 42));
-  EXPECT_PRED_FORMAT2(IsSubstring, "42", FormatFileLocation(nullptr, 42));
-}
-
-TEST(FormatFileLocationTest, FormatsUknownLine) {
-  EXPECT_EQ("foo.cc:", FormatFileLocation("foo.cc", -1));
-}
-
-TEST(FormatFileLocationTest, FormatsUknownFileAndLine) {
-  EXPECT_EQ("unknown file:", FormatFileLocation(nullptr, -1));
-}
-
-// Verifies behavior of FormatCompilerIndependentFileLocation.
-TEST(FormatCompilerIndependentFileLocationTest, FormatsFileLocation) {
-  EXPECT_EQ("foo.cc:42", FormatCompilerIndependentFileLocation("foo.cc", 42));
-}
-
-TEST(FormatCompilerIndependentFileLocationTest, FormatsUknownFile) {
-  EXPECT_EQ("unknown file:42",
-            FormatCompilerIndependentFileLocation(nullptr, 42));
-}
-
-TEST(FormatCompilerIndependentFileLocationTest, FormatsUknownLine) {
-  EXPECT_EQ("foo.cc", FormatCompilerIndependentFileLocation("foo.cc", -1));
-}
-
-TEST(FormatCompilerIndependentFileLocationTest, FormatsUknownFileAndLine) {
-  EXPECT_EQ("unknown file", FormatCompilerIndependentFileLocation(nullptr, -1));
-}
-
-#if GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_QNX || GTEST_OS_FUCHSIA || \
-    GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
-    GTEST_OS_NETBSD || GTEST_OS_OPENBSD
-void* ThreadFunc(void* data) {
-  internal::Mutex* mutex = static_cast<internal::Mutex*>(data);
-  mutex->Lock();
-  mutex->Unlock();
-  return nullptr;
-}
-
-TEST(GetThreadCountTest, ReturnsCorrectValue) {
-  const size_t starting_count = GetThreadCount();
-  pthread_t       thread_id;
-
-  internal::Mutex mutex;
-  {
-    internal::MutexLock lock(&mutex);
-    pthread_attr_t  attr;
-    ASSERT_EQ(0, pthread_attr_init(&attr));
-    ASSERT_EQ(0, pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE));
-
-    const int status = pthread_create(&thread_id, &attr, &ThreadFunc, &mutex);
-    ASSERT_EQ(0, pthread_attr_destroy(&attr));
-    ASSERT_EQ(0, status);
-    EXPECT_EQ(starting_count + 1, GetThreadCount());
-  }
-
-  void* dummy;
-  ASSERT_EQ(0, pthread_join(thread_id, &dummy));
-
-  // The OS may not immediately report the updated thread count after
-  // joining a thread, causing flakiness in this test. To counter that, we
-  // wait for up to .5 seconds for the OS to report the correct value.
-  for (int i = 0; i < 5; ++i) {
-    if (GetThreadCount() == starting_count)
-      break;
-
-    SleepMilliseconds(100);
-  }
-
-  EXPECT_EQ(starting_count, GetThreadCount());
-}
-#else
-TEST(GetThreadCountTest, ReturnsZeroWhenUnableToCountThreads) {
-  EXPECT_EQ(0U, GetThreadCount());
-}
-#endif  // GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_QNX || GTEST_OS_FUCHSIA
-
-TEST(GtestCheckDeathTest, DiesWithCorrectOutputOnFailure) {
-  const bool a_false_condition = false;
-  const char regex[] =
-#ifdef _MSC_VER
-     "googletest-port-test\\.cc\\(\\d+\\):"
-#elif GTEST_USES_POSIX_RE
-     "googletest-port-test\\.cc:[0-9]+"
-#else
-     "googletest-port-test\\.cc:\\d+"
-#endif  // _MSC_VER
-     ".*a_false_condition.*Extra info.*";
-
-  EXPECT_DEATH_IF_SUPPORTED(GTEST_CHECK_(a_false_condition) << "Extra info",
-                            regex);
-}
-
-#if GTEST_HAS_DEATH_TEST
-
-TEST(GtestCheckDeathTest, LivesSilentlyOnSuccess) {
-  EXPECT_EXIT({
-      GTEST_CHECK_(true) << "Extra info";
-      ::std::cerr << "Success\n";
-      exit(0); },
-      ::testing::ExitedWithCode(0), "Success");
-}
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Verifies that Google Test choose regular expression engine appropriate to
-// the platform. The test will produce compiler errors in case of failure.
-// For simplicity, we only cover the most important platforms here.
-TEST(RegexEngineSelectionTest, SelectsCorrectRegexEngine) {
-#if !GTEST_USES_PCRE
-# if GTEST_HAS_POSIX_RE
-
-  EXPECT_TRUE(GTEST_USES_POSIX_RE);
-
-# else
-
-  EXPECT_TRUE(GTEST_USES_SIMPLE_RE);
-
-# endif
-#endif  // !GTEST_USES_PCRE
-}
-
-#if GTEST_USES_POSIX_RE
-
-# if GTEST_HAS_TYPED_TEST
-
-template <typename Str>
-class RETest : public ::testing::Test {};
-
-// Defines StringTypes as the list of all string types that class RE
-// supports.
-typedef testing::Types< ::std::string, const char*> StringTypes;
-
-TYPED_TEST_SUITE(RETest, StringTypes);
-
-// Tests RE's implicit constructors.
-TYPED_TEST(RETest, ImplicitConstructorWorks) {
-  const RE empty(TypeParam(""));
-  EXPECT_STREQ("", empty.pattern());
-
-  const RE simple(TypeParam("hello"));
-  EXPECT_STREQ("hello", simple.pattern());
-
-  const RE normal(TypeParam(".*(\\w+)"));
-  EXPECT_STREQ(".*(\\w+)", normal.pattern());
-}
-
-// Tests that RE's constructors reject invalid regular expressions.
-TYPED_TEST(RETest, RejectsInvalidRegex) {
-  EXPECT_NONFATAL_FAILURE({
-    const RE invalid(TypeParam("?"));
-  }, "\"?\" is not a valid POSIX Extended regular expression.");
-}
-
-// Tests RE::FullMatch().
-TYPED_TEST(RETest, FullMatchWorks) {
-  const RE empty(TypeParam(""));
-  EXPECT_TRUE(RE::FullMatch(TypeParam(""), empty));
-  EXPECT_FALSE(RE::FullMatch(TypeParam("a"), empty));
-
-  const RE re(TypeParam("a.*z"));
-  EXPECT_TRUE(RE::FullMatch(TypeParam("az"), re));
-  EXPECT_TRUE(RE::FullMatch(TypeParam("axyz"), re));
-  EXPECT_FALSE(RE::FullMatch(TypeParam("baz"), re));
-  EXPECT_FALSE(RE::FullMatch(TypeParam("azy"), re));
-}
-
-// Tests RE::PartialMatch().
-TYPED_TEST(RETest, PartialMatchWorks) {
-  const RE empty(TypeParam(""));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam(""), empty));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("a"), empty));
-
-  const RE re(TypeParam("a.*z"));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("az"), re));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("axyz"), re));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("baz"), re));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("azy"), re));
-  EXPECT_FALSE(RE::PartialMatch(TypeParam("zza"), re));
-}
-
-# endif  // GTEST_HAS_TYPED_TEST
-
-#elif GTEST_USES_SIMPLE_RE
-
-TEST(IsInSetTest, NulCharIsNotInAnySet) {
-  EXPECT_FALSE(IsInSet('\0', ""));
-  EXPECT_FALSE(IsInSet('\0', "\0"));
-  EXPECT_FALSE(IsInSet('\0', "a"));
-}
-
-TEST(IsInSetTest, WorksForNonNulChars) {
-  EXPECT_FALSE(IsInSet('a', "Ab"));
-  EXPECT_FALSE(IsInSet('c', ""));
-
-  EXPECT_TRUE(IsInSet('b', "bcd"));
-  EXPECT_TRUE(IsInSet('b', "ab"));
-}
-
-TEST(IsAsciiDigitTest, IsFalseForNonDigit) {
-  EXPECT_FALSE(IsAsciiDigit('\0'));
-  EXPECT_FALSE(IsAsciiDigit(' '));
-  EXPECT_FALSE(IsAsciiDigit('+'));
-  EXPECT_FALSE(IsAsciiDigit('-'));
-  EXPECT_FALSE(IsAsciiDigit('.'));
-  EXPECT_FALSE(IsAsciiDigit('a'));
-}
-
-TEST(IsAsciiDigitTest, IsTrueForDigit) {
-  EXPECT_TRUE(IsAsciiDigit('0'));
-  EXPECT_TRUE(IsAsciiDigit('1'));
-  EXPECT_TRUE(IsAsciiDigit('5'));
-  EXPECT_TRUE(IsAsciiDigit('9'));
-}
-
-TEST(IsAsciiPunctTest, IsFalseForNonPunct) {
-  EXPECT_FALSE(IsAsciiPunct('\0'));
-  EXPECT_FALSE(IsAsciiPunct(' '));
-  EXPECT_FALSE(IsAsciiPunct('\n'));
-  EXPECT_FALSE(IsAsciiPunct('a'));
-  EXPECT_FALSE(IsAsciiPunct('0'));
-}
-
-TEST(IsAsciiPunctTest, IsTrueForPunct) {
-  for (const char* p = "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~"; *p; p++) {
-    EXPECT_PRED1(IsAsciiPunct, *p);
-  }
-}
-
-TEST(IsRepeatTest, IsFalseForNonRepeatChar) {
-  EXPECT_FALSE(IsRepeat('\0'));
-  EXPECT_FALSE(IsRepeat(' '));
-  EXPECT_FALSE(IsRepeat('a'));
-  EXPECT_FALSE(IsRepeat('1'));
-  EXPECT_FALSE(IsRepeat('-'));
-}
-
-TEST(IsRepeatTest, IsTrueForRepeatChar) {
-  EXPECT_TRUE(IsRepeat('?'));
-  EXPECT_TRUE(IsRepeat('*'));
-  EXPECT_TRUE(IsRepeat('+'));
-}
-
-TEST(IsAsciiWhiteSpaceTest, IsFalseForNonWhiteSpace) {
-  EXPECT_FALSE(IsAsciiWhiteSpace('\0'));
-  EXPECT_FALSE(IsAsciiWhiteSpace('a'));
-  EXPECT_FALSE(IsAsciiWhiteSpace('1'));
-  EXPECT_FALSE(IsAsciiWhiteSpace('+'));
-  EXPECT_FALSE(IsAsciiWhiteSpace('_'));
-}
-
-TEST(IsAsciiWhiteSpaceTest, IsTrueForWhiteSpace) {
-  EXPECT_TRUE(IsAsciiWhiteSpace(' '));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\n'));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\r'));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\t'));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\v'));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\f'));
-}
-
-TEST(IsAsciiWordCharTest, IsFalseForNonWordChar) {
-  EXPECT_FALSE(IsAsciiWordChar('\0'));
-  EXPECT_FALSE(IsAsciiWordChar('+'));
-  EXPECT_FALSE(IsAsciiWordChar('.'));
-  EXPECT_FALSE(IsAsciiWordChar(' '));
-  EXPECT_FALSE(IsAsciiWordChar('\n'));
-}
-
-TEST(IsAsciiWordCharTest, IsTrueForLetter) {
-  EXPECT_TRUE(IsAsciiWordChar('a'));
-  EXPECT_TRUE(IsAsciiWordChar('b'));
-  EXPECT_TRUE(IsAsciiWordChar('A'));
-  EXPECT_TRUE(IsAsciiWordChar('Z'));
-}
-
-TEST(IsAsciiWordCharTest, IsTrueForDigit) {
-  EXPECT_TRUE(IsAsciiWordChar('0'));
-  EXPECT_TRUE(IsAsciiWordChar('1'));
-  EXPECT_TRUE(IsAsciiWordChar('7'));
-  EXPECT_TRUE(IsAsciiWordChar('9'));
-}
-
-TEST(IsAsciiWordCharTest, IsTrueForUnderscore) {
-  EXPECT_TRUE(IsAsciiWordChar('_'));
-}
-
-TEST(IsValidEscapeTest, IsFalseForNonPrintable) {
-  EXPECT_FALSE(IsValidEscape('\0'));
-  EXPECT_FALSE(IsValidEscape('\007'));
-}
-
-TEST(IsValidEscapeTest, IsFalseForDigit) {
-  EXPECT_FALSE(IsValidEscape('0'));
-  EXPECT_FALSE(IsValidEscape('9'));
-}
-
-TEST(IsValidEscapeTest, IsFalseForWhiteSpace) {
-  EXPECT_FALSE(IsValidEscape(' '));
-  EXPECT_FALSE(IsValidEscape('\n'));
-}
-
-TEST(IsValidEscapeTest, IsFalseForSomeLetter) {
-  EXPECT_FALSE(IsValidEscape('a'));
-  EXPECT_FALSE(IsValidEscape('Z'));
-}
-
-TEST(IsValidEscapeTest, IsTrueForPunct) {
-  EXPECT_TRUE(IsValidEscape('.'));
-  EXPECT_TRUE(IsValidEscape('-'));
-  EXPECT_TRUE(IsValidEscape('^'));
-  EXPECT_TRUE(IsValidEscape('$'));
-  EXPECT_TRUE(IsValidEscape('('));
-  EXPECT_TRUE(IsValidEscape(']'));
-  EXPECT_TRUE(IsValidEscape('{'));
-  EXPECT_TRUE(IsValidEscape('|'));
-}
-
-TEST(IsValidEscapeTest, IsTrueForSomeLetter) {
-  EXPECT_TRUE(IsValidEscape('d'));
-  EXPECT_TRUE(IsValidEscape('D'));
-  EXPECT_TRUE(IsValidEscape('s'));
-  EXPECT_TRUE(IsValidEscape('S'));
-  EXPECT_TRUE(IsValidEscape('w'));
-  EXPECT_TRUE(IsValidEscape('W'));
-}
-
-TEST(AtomMatchesCharTest, EscapedPunct) {
-  EXPECT_FALSE(AtomMatchesChar(true, '\\', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, '\\', ' '));
-  EXPECT_FALSE(AtomMatchesChar(true, '_', '.'));
-  EXPECT_FALSE(AtomMatchesChar(true, '.', 'a'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, '\\', '\\'));
-  EXPECT_TRUE(AtomMatchesChar(true, '_', '_'));
-  EXPECT_TRUE(AtomMatchesChar(true, '+', '+'));
-  EXPECT_TRUE(AtomMatchesChar(true, '.', '.'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_d) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'd', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'd', 'a'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'd', '.'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'd', '0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'd', '9'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_D) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'D', '0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'D', '9'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'D', '\0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'D', 'a'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'D', '-'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_s) {
-  EXPECT_FALSE(AtomMatchesChar(true, 's', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 's', 'a'));
-  EXPECT_FALSE(AtomMatchesChar(true, 's', '.'));
-  EXPECT_FALSE(AtomMatchesChar(true, 's', '9'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 's', ' '));
-  EXPECT_TRUE(AtomMatchesChar(true, 's', '\n'));
-  EXPECT_TRUE(AtomMatchesChar(true, 's', '\t'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_S) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'S', ' '));
-  EXPECT_FALSE(AtomMatchesChar(true, 'S', '\r'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'S', '\0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'S', 'a'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'S', '9'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_w) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'w', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'w', '+'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'w', ' '));
-  EXPECT_FALSE(AtomMatchesChar(true, 'w', '\n'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'w', '0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'w', 'b'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'w', 'C'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'w', '_'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_W) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'W', 'A'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'W', 'b'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'W', '9'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'W', '_'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'W', '\0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'W', '*'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'W', '\n'));
-}
-
-TEST(AtomMatchesCharTest, EscapedWhiteSpace) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'f', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'f', '\n'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'n', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'n', '\r'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'r', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'r', 'a'));
-  EXPECT_FALSE(AtomMatchesChar(true, 't', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 't', 't'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'v', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'v', '\f'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'f', '\f'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'n', '\n'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'r', '\r'));
-  EXPECT_TRUE(AtomMatchesChar(true, 't', '\t'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'v', '\v'));
-}
-
-TEST(AtomMatchesCharTest, UnescapedDot) {
-  EXPECT_FALSE(AtomMatchesChar(false, '.', '\n'));
-
-  EXPECT_TRUE(AtomMatchesChar(false, '.', '\0'));
-  EXPECT_TRUE(AtomMatchesChar(false, '.', '.'));
-  EXPECT_TRUE(AtomMatchesChar(false, '.', 'a'));
-  EXPECT_TRUE(AtomMatchesChar(false, '.', ' '));
-}
-
-TEST(AtomMatchesCharTest, UnescapedChar) {
-  EXPECT_FALSE(AtomMatchesChar(false, 'a', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(false, 'a', 'b'));
-  EXPECT_FALSE(AtomMatchesChar(false, '$', 'a'));
-
-  EXPECT_TRUE(AtomMatchesChar(false, '$', '$'));
-  EXPECT_TRUE(AtomMatchesChar(false, '5', '5'));
-  EXPECT_TRUE(AtomMatchesChar(false, 'Z', 'Z'));
-}
-
-TEST(ValidateRegexTest, GeneratesFailureAndReturnsFalseForInvalid) {
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex(NULL)),
-                          "NULL is not a valid simple regular expression");
-  EXPECT_NONFATAL_FAILURE(
-      ASSERT_FALSE(ValidateRegex("a\\")),
-      "Syntax error at index 1 in simple regular expression \"a\\\": ");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("a\\")),
-                          "'\\' cannot appear at the end");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("\\n\\")),
-                          "'\\' cannot appear at the end");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("\\s\\hb")),
-                          "invalid escape sequence \"\\h\"");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("^^")),
-                          "'^' can only appear at the beginning");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex(".*^b")),
-                          "'^' can only appear at the beginning");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("$$")),
-                          "'$' can only appear at the end");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("^$a")),
-                          "'$' can only appear at the end");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("a(b")),
-                          "'(' is unsupported");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("ab)")),
-                          "')' is unsupported");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("[ab")),
-                          "'[' is unsupported");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("a{2")),
-                          "'{' is unsupported");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("?")),
-                          "'?' can only follow a repeatable token");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("^*")),
-                          "'*' can only follow a repeatable token");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("5*+")),
-                          "'+' can only follow a repeatable token");
-}
-
-TEST(ValidateRegexTest, ReturnsTrueForValid) {
-  EXPECT_TRUE(ValidateRegex(""));
-  EXPECT_TRUE(ValidateRegex("a"));
-  EXPECT_TRUE(ValidateRegex(".*"));
-  EXPECT_TRUE(ValidateRegex("^a_+"));
-  EXPECT_TRUE(ValidateRegex("^a\\t\\&?"));
-  EXPECT_TRUE(ValidateRegex("09*$"));
-  EXPECT_TRUE(ValidateRegex("^Z$"));
-  EXPECT_TRUE(ValidateRegex("a\\^Z\\$\\(\\)\\|\\[\\]\\{\\}"));
-}
-
-TEST(MatchRepetitionAndRegexAtHeadTest, WorksForZeroOrOne) {
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "a", "ba"));
-  // Repeating more than once.
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "b", "aab"));
-
-  // Repeating zero times.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "b", "ba"));
-  // Repeating once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "b", "ab"));
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '#', '?', ".", "##"));
-}
-
-TEST(MatchRepetitionAndRegexAtHeadTest, WorksForZeroOrMany) {
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, '.', '*', "a$", "baab"));
-
-  // Repeating zero times.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '.', '*', "b", "bc"));
-  // Repeating once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '.', '*', "b", "abc"));
-  // Repeating more than once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(true, 'w', '*', "-", "ab_1-g"));
-}
-
-TEST(MatchRepetitionAndRegexAtHeadTest, WorksForOneOrMany) {
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, '.', '+', "a$", "baab"));
-  // Repeating zero times.
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, '.', '+', "b", "bc"));
-
-  // Repeating once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '.', '+', "b", "abc"));
-  // Repeating more than once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(true, 'w', '+', "-", "ab_1-g"));
-}
-
-TEST(MatchRegexAtHeadTest, ReturnsTrueForEmptyRegex) {
-  EXPECT_TRUE(MatchRegexAtHead("", ""));
-  EXPECT_TRUE(MatchRegexAtHead("", "ab"));
-}
-
-TEST(MatchRegexAtHeadTest, WorksWhenDollarIsInRegex) {
-  EXPECT_FALSE(MatchRegexAtHead("$", "a"));
-
-  EXPECT_TRUE(MatchRegexAtHead("$", ""));
-  EXPECT_TRUE(MatchRegexAtHead("a$", "a"));
-}
-
-TEST(MatchRegexAtHeadTest, WorksWhenRegexStartsWithEscapeSequence) {
-  EXPECT_FALSE(MatchRegexAtHead("\\w", "+"));
-  EXPECT_FALSE(MatchRegexAtHead("\\W", "ab"));
-
-  EXPECT_TRUE(MatchRegexAtHead("\\sa", "\nab"));
-  EXPECT_TRUE(MatchRegexAtHead("\\d", "1a"));
-}
-
-TEST(MatchRegexAtHeadTest, WorksWhenRegexStartsWithRepetition) {
-  EXPECT_FALSE(MatchRegexAtHead(".+a", "abc"));
-  EXPECT_FALSE(MatchRegexAtHead("a?b", "aab"));
-
-  EXPECT_TRUE(MatchRegexAtHead(".*a", "bc12-ab"));
-  EXPECT_TRUE(MatchRegexAtHead("a?b", "b"));
-  EXPECT_TRUE(MatchRegexAtHead("a?b", "ab"));
-}
-
-TEST(MatchRegexAtHeadTest,
-     WorksWhenRegexStartsWithRepetionOfEscapeSequence) {
-  EXPECT_FALSE(MatchRegexAtHead("\\.+a", "abc"));
-  EXPECT_FALSE(MatchRegexAtHead("\\s?b", "  b"));
-
-  EXPECT_TRUE(MatchRegexAtHead("\\(*a", "((((ab"));
-  EXPECT_TRUE(MatchRegexAtHead("\\^?b", "^b"));
-  EXPECT_TRUE(MatchRegexAtHead("\\\\?b", "b"));
-  EXPECT_TRUE(MatchRegexAtHead("\\\\?b", "\\b"));
-}
-
-TEST(MatchRegexAtHeadTest, MatchesSequentially) {
-  EXPECT_FALSE(MatchRegexAtHead("ab.*c", "acabc"));
-
-  EXPECT_TRUE(MatchRegexAtHead("ab.*c", "ab-fsc"));
-}
-
-TEST(MatchRegexAnywhereTest, ReturnsFalseWhenStringIsNull) {
-  EXPECT_FALSE(MatchRegexAnywhere("", NULL));
-}
-
-TEST(MatchRegexAnywhereTest, WorksWhenRegexStartsWithCaret) {
-  EXPECT_FALSE(MatchRegexAnywhere("^a", "ba"));
-  EXPECT_FALSE(MatchRegexAnywhere("^$", "a"));
-
-  EXPECT_TRUE(MatchRegexAnywhere("^a", "ab"));
-  EXPECT_TRUE(MatchRegexAnywhere("^", "ab"));
-  EXPECT_TRUE(MatchRegexAnywhere("^$", ""));
-}
-
-TEST(MatchRegexAnywhereTest, ReturnsFalseWhenNoMatch) {
-  EXPECT_FALSE(MatchRegexAnywhere("a", "bcde123"));
-  EXPECT_FALSE(MatchRegexAnywhere("a.+a", "--aa88888888"));
-}
-
-TEST(MatchRegexAnywhereTest, ReturnsTrueWhenMatchingPrefix) {
-  EXPECT_TRUE(MatchRegexAnywhere("\\w+", "ab1_ - 5"));
-  EXPECT_TRUE(MatchRegexAnywhere(".*=", "="));
-  EXPECT_TRUE(MatchRegexAnywhere("x.*ab?.*bc", "xaaabc"));
-}
-
-TEST(MatchRegexAnywhereTest, ReturnsTrueWhenMatchingNonPrefix) {
-  EXPECT_TRUE(MatchRegexAnywhere("\\w+", "$$$ ab1_ - 5"));
-  EXPECT_TRUE(MatchRegexAnywhere("\\.+=", "=  ...="));
-}
-
-// Tests RE's implicit constructors.
-TEST(RETest, ImplicitConstructorWorks) {
-  const RE empty("");
-  EXPECT_STREQ("", empty.pattern());
-
-  const RE simple("hello");
-  EXPECT_STREQ("hello", simple.pattern());
-}
-
-// Tests that RE's constructors reject invalid regular expressions.
-TEST(RETest, RejectsInvalidRegex) {
-  EXPECT_NONFATAL_FAILURE({
-    const RE normal(NULL);
-  }, "NULL is not a valid simple regular expression");
-
-  EXPECT_NONFATAL_FAILURE({
-    const RE normal(".*(\\w+");
-  }, "'(' is unsupported");
-
-  EXPECT_NONFATAL_FAILURE({
-    const RE invalid("^?");
-  }, "'?' can only follow a repeatable token");
-}
-
-// Tests RE::FullMatch().
-TEST(RETest, FullMatchWorks) {
-  const RE empty("");
-  EXPECT_TRUE(RE::FullMatch("", empty));
-  EXPECT_FALSE(RE::FullMatch("a", empty));
-
-  const RE re1("a");
-  EXPECT_TRUE(RE::FullMatch("a", re1));
-
-  const RE re("a.*z");
-  EXPECT_TRUE(RE::FullMatch("az", re));
-  EXPECT_TRUE(RE::FullMatch("axyz", re));
-  EXPECT_FALSE(RE::FullMatch("baz", re));
-  EXPECT_FALSE(RE::FullMatch("azy", re));
-}
-
-// Tests RE::PartialMatch().
-TEST(RETest, PartialMatchWorks) {
-  const RE empty("");
-  EXPECT_TRUE(RE::PartialMatch("", empty));
-  EXPECT_TRUE(RE::PartialMatch("a", empty));
-
-  const RE re("a.*z");
-  EXPECT_TRUE(RE::PartialMatch("az", re));
-  EXPECT_TRUE(RE::PartialMatch("axyz", re));
-  EXPECT_TRUE(RE::PartialMatch("baz", re));
-  EXPECT_TRUE(RE::PartialMatch("azy", re));
-  EXPECT_FALSE(RE::PartialMatch("zza", re));
-}
-
-#endif  // GTEST_USES_POSIX_RE
-
-#if !GTEST_OS_WINDOWS_MOBILE
-
-TEST(CaptureTest, CapturesStdout) {
-  CaptureStdout();
-  fprintf(stdout, "abc");
-  EXPECT_STREQ("abc", GetCapturedStdout().c_str());
-
-  CaptureStdout();
-  fprintf(stdout, "def%cghi", '\0');
-  EXPECT_EQ(::std::string("def\0ghi", 7), ::std::string(GetCapturedStdout()));
-}
-
-TEST(CaptureTest, CapturesStderr) {
-  CaptureStderr();
-  fprintf(stderr, "jkl");
-  EXPECT_STREQ("jkl", GetCapturedStderr().c_str());
-
-  CaptureStderr();
-  fprintf(stderr, "jkl%cmno", '\0');
-  EXPECT_EQ(::std::string("jkl\0mno", 7), ::std::string(GetCapturedStderr()));
-}
-
-// Tests that stdout and stderr capture don't interfere with each other.
-TEST(CaptureTest, CapturesStdoutAndStderr) {
-  CaptureStdout();
-  CaptureStderr();
-  fprintf(stdout, "pqr");
-  fprintf(stderr, "stu");
-  EXPECT_STREQ("pqr", GetCapturedStdout().c_str());
-  EXPECT_STREQ("stu", GetCapturedStderr().c_str());
-}
-
-TEST(CaptureDeathTest, CannotReenterStdoutCapture) {
-  CaptureStdout();
-  EXPECT_DEATH_IF_SUPPORTED(CaptureStdout(),
-                            "Only one stdout capturer can exist at a time");
-  GetCapturedStdout();
-
-  // We cannot test stderr capturing using death tests as they use it
-  // themselves.
-}
-
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-TEST(ThreadLocalTest, DefaultConstructorInitializesToDefaultValues) {
-  ThreadLocal<int> t1;
-  EXPECT_EQ(0, t1.get());
-
-  ThreadLocal<void*> t2;
-  EXPECT_TRUE(t2.get() == nullptr);
-}
-
-TEST(ThreadLocalTest, SingleParamConstructorInitializesToParam) {
-  ThreadLocal<int> t1(123);
-  EXPECT_EQ(123, t1.get());
-
-  int i = 0;
-  ThreadLocal<int*> t2(&i);
-  EXPECT_EQ(&i, t2.get());
-}
-
-class NoDefaultContructor {
- public:
-  explicit NoDefaultContructor(const char*) {}
-  NoDefaultContructor(const NoDefaultContructor&) {}
-};
-
-TEST(ThreadLocalTest, ValueDefaultContructorIsNotRequiredForParamVersion) {
-  ThreadLocal<NoDefaultContructor> bar(NoDefaultContructor("foo"));
-  bar.pointer();
-}
-
-TEST(ThreadLocalTest, GetAndPointerReturnSameValue) {
-  ThreadLocal<std::string> thread_local_string;
-
-  EXPECT_EQ(thread_local_string.pointer(), &(thread_local_string.get()));
-
-  // Verifies the condition still holds after calling set.
-  thread_local_string.set("foo");
-  EXPECT_EQ(thread_local_string.pointer(), &(thread_local_string.get()));
-}
-
-TEST(ThreadLocalTest, PointerAndConstPointerReturnSameValue) {
-  ThreadLocal<std::string> thread_local_string;
-  const ThreadLocal<std::string>& const_thread_local_string =
-      thread_local_string;
-
-  EXPECT_EQ(thread_local_string.pointer(), const_thread_local_string.pointer());
-
-  thread_local_string.set("foo");
-  EXPECT_EQ(thread_local_string.pointer(), const_thread_local_string.pointer());
-}
-
-#if GTEST_IS_THREADSAFE
-
-void AddTwo(int* param) { *param += 2; }
-
-TEST(ThreadWithParamTest, ConstructorExecutesThreadFunc) {
-  int i = 40;
-  ThreadWithParam<int*> thread(&AddTwo, &i, nullptr);
-  thread.Join();
-  EXPECT_EQ(42, i);
-}
-
-TEST(MutexDeathTest, AssertHeldShouldAssertWhenNotLocked) {
-  // AssertHeld() is flaky only in the presence of multiple threads accessing
-  // the lock. In this case, the test is robust.
-  EXPECT_DEATH_IF_SUPPORTED({
-    Mutex m;
-    { MutexLock lock(&m); }
-    m.AssertHeld();
-  },
-  "thread .*hold");
-}
-
-TEST(MutexTest, AssertHeldShouldNotAssertWhenLocked) {
-  Mutex m;
-  MutexLock lock(&m);
-  m.AssertHeld();
-}
-
-class AtomicCounterWithMutex {
- public:
-  explicit AtomicCounterWithMutex(Mutex* mutex) :
-    value_(0), mutex_(mutex), random_(42) {}
-
-  void Increment() {
-    MutexLock lock(mutex_);
-    int temp = value_;
-    {
-      // We need to put up a memory barrier to prevent reads and writes to
-      // value_ rearranged with the call to SleepMilliseconds when observed
-      // from other threads.
-#if GTEST_HAS_PTHREAD
-      // On POSIX, locking a mutex puts up a memory barrier.  We cannot use
-      // Mutex and MutexLock here or rely on their memory barrier
-      // functionality as we are testing them here.
-      pthread_mutex_t memory_barrier_mutex;
-      GTEST_CHECK_POSIX_SUCCESS_(
-          pthread_mutex_init(&memory_barrier_mutex, nullptr));
-      GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_lock(&memory_barrier_mutex));
-
-      SleepMilliseconds(static_cast<int>(random_.Generate(30)));
-
-      GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_unlock(&memory_barrier_mutex));
-      GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_destroy(&memory_barrier_mutex));
-#elif GTEST_OS_WINDOWS
-      // On Windows, performing an interlocked access puts up a memory barrier.
-      volatile LONG dummy = 0;
-      ::InterlockedIncrement(&dummy);
-      SleepMilliseconds(static_cast<int>(random_.Generate(30)));
-      ::InterlockedIncrement(&dummy);
-#else
-# error "Memory barrier not implemented on this platform."
-#endif  // GTEST_HAS_PTHREAD
-    }
-    value_ = temp + 1;
-  }
-  int value() const { return value_; }
-
- private:
-  volatile int value_;
-  Mutex* const mutex_;  // Protects value_.
-  Random       random_;
-};
-
-void CountingThreadFunc(pair<AtomicCounterWithMutex*, int> param) {
-  for (int i = 0; i < param.second; ++i)
-      param.first->Increment();
-}
-
-// Tests that the mutex only lets one thread at a time to lock it.
-TEST(MutexTest, OnlyOneThreadCanLockAtATime) {
-  Mutex mutex;
-  AtomicCounterWithMutex locked_counter(&mutex);
-
-  typedef ThreadWithParam<pair<AtomicCounterWithMutex*, int> > ThreadType;
-  const int kCycleCount = 20;
-  const int kThreadCount = 7;
-  std::unique_ptr<ThreadType> counting_threads[kThreadCount];
-  Notification threads_can_start;
-  // Creates and runs kThreadCount threads that increment locked_counter
-  // kCycleCount times each.
-  for (int i = 0; i < kThreadCount; ++i) {
-    counting_threads[i].reset(new ThreadType(&CountingThreadFunc,
-                                             make_pair(&locked_counter,
-                                                       kCycleCount),
-                                             &threads_can_start));
-  }
-  threads_can_start.Notify();
-  for (int i = 0; i < kThreadCount; ++i)
-    counting_threads[i]->Join();
-
-  // If the mutex lets more than one thread to increment the counter at a
-  // time, they are likely to encounter a race condition and have some
-  // increments overwritten, resulting in the lower then expected counter
-  // value.
-  EXPECT_EQ(kCycleCount * kThreadCount, locked_counter.value());
-}
-
-template <typename T>
-void RunFromThread(void (func)(T), T param) {
-  ThreadWithParam<T> thread(func, param, nullptr);
-  thread.Join();
-}
-
-void RetrieveThreadLocalValue(
-    pair<ThreadLocal<std::string>*, std::string*> param) {
-  *param.second = param.first->get();
-}
-
-TEST(ThreadLocalTest, ParameterizedConstructorSetsDefault) {
-  ThreadLocal<std::string> thread_local_string("foo");
-  EXPECT_STREQ("foo", thread_local_string.get().c_str());
-
-  thread_local_string.set("bar");
-  EXPECT_STREQ("bar", thread_local_string.get().c_str());
-
-  std::string result;
-  RunFromThread(&RetrieveThreadLocalValue,
-                make_pair(&thread_local_string, &result));
-  EXPECT_STREQ("foo", result.c_str());
-}
-
-// Keeps track of whether of destructors being called on instances of
-// DestructorTracker.  On Windows, waits for the destructor call reports.
-class DestructorCall {
- public:
-  DestructorCall() {
-    invoked_ = false;
-#if GTEST_OS_WINDOWS
-    wait_event_.Reset(::CreateEvent(NULL, TRUE, FALSE, NULL));
-    GTEST_CHECK_(wait_event_.Get() != NULL);
-#endif
-  }
-
-  bool CheckDestroyed() const {
-#if GTEST_OS_WINDOWS
-    if (::WaitForSingleObject(wait_event_.Get(), 1000) != WAIT_OBJECT_0)
-      return false;
-#endif
-    return invoked_;
-  }
-
-  void ReportDestroyed() {
-    invoked_ = true;
-#if GTEST_OS_WINDOWS
-    ::SetEvent(wait_event_.Get());
-#endif
-  }
-
-  static std::vector<DestructorCall*>& List() { return *list_; }
-
-  static void ResetList() {
-    for (size_t i = 0; i < list_->size(); ++i) {
-      delete list_->at(i);
-    }
-    list_->clear();
-  }
-
- private:
-  bool invoked_;
-#if GTEST_OS_WINDOWS
-  AutoHandle wait_event_;
-#endif
-  static std::vector<DestructorCall*>* const list_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DestructorCall);
-};
-
-std::vector<DestructorCall*>* const DestructorCall::list_ =
-    new std::vector<DestructorCall*>;
-
-// DestructorTracker keeps track of whether its instances have been
-// destroyed.
-class DestructorTracker {
- public:
-  DestructorTracker() : index_(GetNewIndex()) {}
-  DestructorTracker(const DestructorTracker& /* rhs */)
-      : index_(GetNewIndex()) {}
-  ~DestructorTracker() {
-    // We never access DestructorCall::List() concurrently, so we don't need
-    // to protect this access with a mutex.
-    DestructorCall::List()[index_]->ReportDestroyed();
-  }
-
- private:
-  static size_t GetNewIndex() {
-    DestructorCall::List().push_back(new DestructorCall);
-    return DestructorCall::List().size() - 1;
-  }
-  const size_t index_;
-
-  GTEST_DISALLOW_ASSIGN_(DestructorTracker);
-};
-
-typedef ThreadLocal<DestructorTracker>* ThreadParam;
-
-void CallThreadLocalGet(ThreadParam thread_local_param) {
-  thread_local_param->get();
-}
-
-// Tests that when a ThreadLocal object dies in a thread, it destroys
-// the managed object for that thread.
-TEST(ThreadLocalTest, DestroysManagedObjectForOwnThreadWhenDying) {
-  DestructorCall::ResetList();
-
-  {
-    ThreadLocal<DestructorTracker> thread_local_tracker;
-    ASSERT_EQ(0U, DestructorCall::List().size());
-
-    // This creates another DestructorTracker object for the main thread.
-    thread_local_tracker.get();
-    ASSERT_EQ(1U, DestructorCall::List().size());
-    ASSERT_FALSE(DestructorCall::List()[0]->CheckDestroyed());
-  }
-
-  // Now thread_local_tracker has died.
-  ASSERT_EQ(1U, DestructorCall::List().size());
-  EXPECT_TRUE(DestructorCall::List()[0]->CheckDestroyed());
-
-  DestructorCall::ResetList();
-}
-
-// Tests that when a thread exits, the thread-local object for that
-// thread is destroyed.
-TEST(ThreadLocalTest, DestroysManagedObjectAtThreadExit) {
-  DestructorCall::ResetList();
-
-  {
-    ThreadLocal<DestructorTracker> thread_local_tracker;
-    ASSERT_EQ(0U, DestructorCall::List().size());
-
-    // This creates another DestructorTracker object in the new thread.
-    ThreadWithParam<ThreadParam> thread(&CallThreadLocalGet,
-                                        &thread_local_tracker, nullptr);
-    thread.Join();
-
-    // The thread has exited, and we should have a DestroyedTracker
-    // instance created for it. But it may not have been destroyed yet.
-    ASSERT_EQ(1U, DestructorCall::List().size());
-  }
-
-  // The thread has exited and thread_local_tracker has died.
-  ASSERT_EQ(1U, DestructorCall::List().size());
-  EXPECT_TRUE(DestructorCall::List()[0]->CheckDestroyed());
-
-  DestructorCall::ResetList();
-}
-
-TEST(ThreadLocalTest, ThreadLocalMutationsAffectOnlyCurrentThread) {
-  ThreadLocal<std::string> thread_local_string;
-  thread_local_string.set("Foo");
-  EXPECT_STREQ("Foo", thread_local_string.get().c_str());
-
-  std::string result;
-  RunFromThread(&RetrieveThreadLocalValue,
-                make_pair(&thread_local_string, &result));
-  EXPECT_TRUE(result.empty());
-}
-
-#endif  // GTEST_IS_THREADSAFE
-
-#if GTEST_OS_WINDOWS
-TEST(WindowsTypesTest, HANDLEIsVoidStar) {
-  StaticAssertTypeEq<HANDLE, void*>();
-}
-
-#if GTEST_OS_WINDOWS_MINGW && !defined(__MINGW64_VERSION_MAJOR)
-TEST(WindowsTypesTest, _CRITICAL_SECTIONIs_CRITICAL_SECTION) {
-  StaticAssertTypeEq<CRITICAL_SECTION, _CRITICAL_SECTION>();
-}
-#else
-TEST(WindowsTypesTest, CRITICAL_SECTIONIs_RTL_CRITICAL_SECTION) {
-  StaticAssertTypeEq<CRITICAL_SECTION, _RTL_CRITICAL_SECTION>();
-}
-#endif
-
-#endif  // GTEST_OS_WINDOWS
-
-}  // namespace internal
-}  // namespace testing
diff --git a/3rdparty/gtest/test/googletest-printers-test.cc b/3rdparty/gtest/test/googletest-printers-test.cc
deleted file mode 100644
index 4bdc9add..00000000
--- a/3rdparty/gtest/test/googletest-printers-test.cc
+++ /dev/null
@@ -1,1620 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Test - The Google C++ Testing and Mocking Framework
-//
-// This file tests the universal value printer.
-
-#include <ctype.h>
-#include <limits.h>
-#include <string.h>
-#include <algorithm>
-#include <deque>
-#include <forward_list>
-#include <list>
-#include <map>
-#include <set>
-#include <sstream>
-#include <string>
-#include <unordered_map>
-#include <unordered_set>
-#include <utility>
-#include <vector>
-
-#include "gtest/gtest-printers.h"
-#include "gtest/gtest.h"
-
-// Some user-defined types for testing the universal value printer.
-
-// An anonymous enum type.
-enum AnonymousEnum {
-  kAE1 = -1,
-  kAE2 = 1
-};
-
-// An enum without a user-defined printer.
-enum EnumWithoutPrinter {
-  kEWP1 = -2,
-  kEWP2 = 42
-};
-
-// An enum with a << operator.
-enum EnumWithStreaming {
-  kEWS1 = 10
-};
-
-std::ostream& operator<<(std::ostream& os, EnumWithStreaming e) {
-  return os << (e == kEWS1 ? "kEWS1" : "invalid");
-}
-
-// An enum with a PrintTo() function.
-enum EnumWithPrintTo {
-  kEWPT1 = 1
-};
-
-void PrintTo(EnumWithPrintTo e, std::ostream* os) {
-  *os << (e == kEWPT1 ? "kEWPT1" : "invalid");
-}
-
-// A class implicitly convertible to BiggestInt.
-class BiggestIntConvertible {
- public:
-  operator ::testing::internal::BiggestInt() const { return 42; }
-};
-
-// A user-defined unprintable class template in the global namespace.
-template <typename T>
-class UnprintableTemplateInGlobal {
- public:
-  UnprintableTemplateInGlobal() : value_() {}
- private:
-  T value_;
-};
-
-// A user-defined streamable type in the global namespace.
-class StreamableInGlobal {
- public:
-  virtual ~StreamableInGlobal() {}
-};
-
-inline void operator<<(::std::ostream& os, const StreamableInGlobal& /* x */) {
-  os << "StreamableInGlobal";
-}
-
-void operator<<(::std::ostream& os, const StreamableInGlobal* /* x */) {
-  os << "StreamableInGlobal*";
-}
-
-namespace foo {
-
-// A user-defined unprintable type in a user namespace.
-class UnprintableInFoo {
- public:
-  UnprintableInFoo() : z_(0) { memcpy(xy_, "\xEF\x12\x0\x0\x34\xAB\x0\x0", 8); }
-  double z() const { return z_; }
- private:
-  char xy_[8];
-  double z_;
-};
-
-// A user-defined printable type in a user-chosen namespace.
-struct PrintableViaPrintTo {
-  PrintableViaPrintTo() : value() {}
-  int value;
-};
-
-void PrintTo(const PrintableViaPrintTo& x, ::std::ostream* os) {
-  *os << "PrintableViaPrintTo: " << x.value;
-}
-
-// A type with a user-defined << for printing its pointer.
-struct PointerPrintable {
-};
-
-::std::ostream& operator<<(::std::ostream& os,
-                           const PointerPrintable* /* x */) {
-  return os << "PointerPrintable*";
-}
-
-// A user-defined printable class template in a user-chosen namespace.
-template <typename T>
-class PrintableViaPrintToTemplate {
- public:
-  explicit PrintableViaPrintToTemplate(const T& a_value) : value_(a_value) {}
-
-  const T& value() const { return value_; }
- private:
-  T value_;
-};
-
-template <typename T>
-void PrintTo(const PrintableViaPrintToTemplate<T>& x, ::std::ostream* os) {
-  *os << "PrintableViaPrintToTemplate: " << x.value();
-}
-
-// A user-defined streamable class template in a user namespace.
-template <typename T>
-class StreamableTemplateInFoo {
- public:
-  StreamableTemplateInFoo() : value_() {}
-
-  const T& value() const { return value_; }
- private:
-  T value_;
-};
-
-template <typename T>
-inline ::std::ostream& operator<<(::std::ostream& os,
-                                  const StreamableTemplateInFoo<T>& x) {
-  return os << "StreamableTemplateInFoo: " << x.value();
-}
-
-// A user-defined streamable but recursivly-defined container type in
-// a user namespace, it mimics therefore std::filesystem::path or
-// boost::filesystem::path.
-class PathLike {
- public:
-  struct iterator {
-    typedef PathLike value_type;
-
-    iterator& operator++();
-    PathLike& operator*();
-  };
-
-  using value_type = char;
-  using const_iterator = iterator;
-
-  PathLike() {}
-
-  iterator begin() const { return iterator(); }
-  iterator end() const { return iterator(); }
-
-  friend ::std::ostream& operator<<(::std::ostream& os, const PathLike&) {
-    return os << "Streamable-PathLike";
-  }
-};
-
-}  // namespace foo
-
-namespace testing {
-namespace gtest_printers_test {
-
-using ::std::deque;
-using ::std::list;
-using ::std::make_pair;
-using ::std::map;
-using ::std::multimap;
-using ::std::multiset;
-using ::std::pair;
-using ::std::set;
-using ::std::vector;
-using ::testing::PrintToString;
-using ::testing::internal::FormatForComparisonFailureMessage;
-using ::testing::internal::ImplicitCast_;
-using ::testing::internal::NativeArray;
-using ::testing::internal::RE;
-using ::testing::internal::RelationToSourceReference;
-using ::testing::internal::Strings;
-using ::testing::internal::UniversalPrint;
-using ::testing::internal::UniversalPrinter;
-using ::testing::internal::UniversalTersePrint;
-using ::testing::internal::UniversalTersePrintTupleFieldsToStrings;
-
-// Prints a value to a string using the universal value printer.  This
-// is a helper for testing UniversalPrinter<T>::Print() for various types.
-template <typename T>
-std::string Print(const T& value) {
-  ::std::stringstream ss;
-  UniversalPrinter<T>::Print(value, &ss);
-  return ss.str();
-}
-
-// Prints a value passed by reference to a string, using the universal
-// value printer.  This is a helper for testing
-// UniversalPrinter<T&>::Print() for various types.
-template <typename T>
-std::string PrintByRef(const T& value) {
-  ::std::stringstream ss;
-  UniversalPrinter<T&>::Print(value, &ss);
-  return ss.str();
-}
-
-// Tests printing various enum types.
-
-TEST(PrintEnumTest, AnonymousEnum) {
-  EXPECT_EQ("-1", Print(kAE1));
-  EXPECT_EQ("1", Print(kAE2));
-}
-
-TEST(PrintEnumTest, EnumWithoutPrinter) {
-  EXPECT_EQ("-2", Print(kEWP1));
-  EXPECT_EQ("42", Print(kEWP2));
-}
-
-TEST(PrintEnumTest, EnumWithStreaming) {
-  EXPECT_EQ("kEWS1", Print(kEWS1));
-  EXPECT_EQ("invalid", Print(static_cast<EnumWithStreaming>(0)));
-}
-
-TEST(PrintEnumTest, EnumWithPrintTo) {
-  EXPECT_EQ("kEWPT1", Print(kEWPT1));
-  EXPECT_EQ("invalid", Print(static_cast<EnumWithPrintTo>(0)));
-}
-
-// Tests printing a class implicitly convertible to BiggestInt.
-
-TEST(PrintClassTest, BiggestIntConvertible) {
-  EXPECT_EQ("42", Print(BiggestIntConvertible()));
-}
-
-// Tests printing various char types.
-
-// char.
-TEST(PrintCharTest, PlainChar) {
-  EXPECT_EQ("'\\0'", Print('\0'));
-  EXPECT_EQ("'\\'' (39, 0x27)", Print('\''));
-  EXPECT_EQ("'\"' (34, 0x22)", Print('"'));
-  EXPECT_EQ("'?' (63, 0x3F)", Print('?'));
-  EXPECT_EQ("'\\\\' (92, 0x5C)", Print('\\'));
-  EXPECT_EQ("'\\a' (7)", Print('\a'));
-  EXPECT_EQ("'\\b' (8)", Print('\b'));
-  EXPECT_EQ("'\\f' (12, 0xC)", Print('\f'));
-  EXPECT_EQ("'\\n' (10, 0xA)", Print('\n'));
-  EXPECT_EQ("'\\r' (13, 0xD)", Print('\r'));
-  EXPECT_EQ("'\\t' (9)", Print('\t'));
-  EXPECT_EQ("'\\v' (11, 0xB)", Print('\v'));
-  EXPECT_EQ("'\\x7F' (127)", Print('\x7F'));
-  EXPECT_EQ("'\\xFF' (255)", Print('\xFF'));
-  EXPECT_EQ("' ' (32, 0x20)", Print(' '));
-  EXPECT_EQ("'a' (97, 0x61)", Print('a'));
-}
-
-// signed char.
-TEST(PrintCharTest, SignedChar) {
-  EXPECT_EQ("'\\0'", Print(static_cast<signed char>('\0')));
-  EXPECT_EQ("'\\xCE' (-50)",
-            Print(static_cast<signed char>(-50)));
-}
-
-// unsigned char.
-TEST(PrintCharTest, UnsignedChar) {
-  EXPECT_EQ("'\\0'", Print(static_cast<unsigned char>('\0')));
-  EXPECT_EQ("'b' (98, 0x62)",
-            Print(static_cast<unsigned char>('b')));
-}
-
-// Tests printing other simple, built-in types.
-
-// bool.
-TEST(PrintBuiltInTypeTest, Bool) {
-  EXPECT_EQ("false", Print(false));
-  EXPECT_EQ("true", Print(true));
-}
-
-// wchar_t.
-TEST(PrintBuiltInTypeTest, Wchar_t) {
-  EXPECT_EQ("L'\\0'", Print(L'\0'));
-  EXPECT_EQ("L'\\'' (39, 0x27)", Print(L'\''));
-  EXPECT_EQ("L'\"' (34, 0x22)", Print(L'"'));
-  EXPECT_EQ("L'?' (63, 0x3F)", Print(L'?'));
-  EXPECT_EQ("L'\\\\' (92, 0x5C)", Print(L'\\'));
-  EXPECT_EQ("L'\\a' (7)", Print(L'\a'));
-  EXPECT_EQ("L'\\b' (8)", Print(L'\b'));
-  EXPECT_EQ("L'\\f' (12, 0xC)", Print(L'\f'));
-  EXPECT_EQ("L'\\n' (10, 0xA)", Print(L'\n'));
-  EXPECT_EQ("L'\\r' (13, 0xD)", Print(L'\r'));
-  EXPECT_EQ("L'\\t' (9)", Print(L'\t'));
-  EXPECT_EQ("L'\\v' (11, 0xB)", Print(L'\v'));
-  EXPECT_EQ("L'\\x7F' (127)", Print(L'\x7F'));
-  EXPECT_EQ("L'\\xFF' (255)", Print(L'\xFF'));
-  EXPECT_EQ("L' ' (32, 0x20)", Print(L' '));
-  EXPECT_EQ("L'a' (97, 0x61)", Print(L'a'));
-  EXPECT_EQ("L'\\x576' (1398)", Print(static_cast<wchar_t>(0x576)));
-  EXPECT_EQ("L'\\xC74D' (51021)", Print(static_cast<wchar_t>(0xC74D)));
-}
-
-// Test that Int64 provides more storage than wchar_t.
-TEST(PrintTypeSizeTest, Wchar_t) {
-  EXPECT_LT(sizeof(wchar_t), sizeof(testing::internal::Int64));
-}
-
-// Various integer types.
-TEST(PrintBuiltInTypeTest, Integer) {
-  EXPECT_EQ("'\\xFF' (255)", Print(static_cast<unsigned char>(255)));  // uint8
-  EXPECT_EQ("'\\x80' (-128)", Print(static_cast<signed char>(-128)));  // int8
-  EXPECT_EQ("65535", Print(USHRT_MAX));  // uint16
-  EXPECT_EQ("-32768", Print(SHRT_MIN));  // int16
-  EXPECT_EQ("4294967295", Print(UINT_MAX));  // uint32
-  EXPECT_EQ("-2147483648", Print(INT_MIN));  // int32
-  EXPECT_EQ("18446744073709551615",
-            Print(static_cast<testing::internal::UInt64>(-1)));  // uint64
-  EXPECT_EQ("-9223372036854775808",
-            Print(static_cast<testing::internal::Int64>(1) << 63));  // int64
-}
-
-// Size types.
-TEST(PrintBuiltInTypeTest, Size_t) {
-  EXPECT_EQ("1", Print(sizeof('a')));  // size_t.
-#if !GTEST_OS_WINDOWS
-  // Windows has no ssize_t type.
-  EXPECT_EQ("-2", Print(static_cast<ssize_t>(-2)));  // ssize_t.
-#endif  // !GTEST_OS_WINDOWS
-}
-
-// Floating-points.
-TEST(PrintBuiltInTypeTest, FloatingPoints) {
-  EXPECT_EQ("1.5", Print(1.5f));   // float
-  EXPECT_EQ("-2.5", Print(-2.5));  // double
-}
-
-// Since ::std::stringstream::operator<<(const void *) formats the pointer
-// output differently with different compilers, we have to create the expected
-// output first and use it as our expectation.
-static std::string PrintPointer(const void* p) {
-  ::std::stringstream expected_result_stream;
-  expected_result_stream << p;
-  return expected_result_stream.str();
-}
-
-// Tests printing C strings.
-
-// const char*.
-TEST(PrintCStringTest, Const) {
-  const char* p = "World";
-  EXPECT_EQ(PrintPointer(p) + " pointing to \"World\"", Print(p));
-}
-
-// char*.
-TEST(PrintCStringTest, NonConst) {
-  char p[] = "Hi";
-  EXPECT_EQ(PrintPointer(p) + " pointing to \"Hi\"",
-            Print(static_cast<char*>(p)));
-}
-
-// NULL C string.
-TEST(PrintCStringTest, Null) {
-  const char* p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests that C strings are escaped properly.
-TEST(PrintCStringTest, EscapesProperly) {
-  const char* p = "'\"?\\\a\b\f\n\r\t\v\x7F\xFF a";
-  EXPECT_EQ(PrintPointer(p) + " pointing to \"'\\\"?\\\\\\a\\b\\f"
-            "\\n\\r\\t\\v\\x7F\\xFF a\"",
-            Print(p));
-}
-
-// MSVC compiler can be configured to define whar_t as a typedef
-// of unsigned short. Defining an overload for const wchar_t* in that case
-// would cause pointers to unsigned shorts be printed as wide strings,
-// possibly accessing more memory than intended and causing invalid
-// memory accesses. MSVC defines _NATIVE_WCHAR_T_DEFINED symbol when
-// wchar_t is implemented as a native type.
-#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
-
-// const wchar_t*.
-TEST(PrintWideCStringTest, Const) {
-  const wchar_t* p = L"World";
-  EXPECT_EQ(PrintPointer(p) + " pointing to L\"World\"", Print(p));
-}
-
-// wchar_t*.
-TEST(PrintWideCStringTest, NonConst) {
-  wchar_t p[] = L"Hi";
-  EXPECT_EQ(PrintPointer(p) + " pointing to L\"Hi\"",
-            Print(static_cast<wchar_t*>(p)));
-}
-
-// NULL wide C string.
-TEST(PrintWideCStringTest, Null) {
-  const wchar_t* p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests that wide C strings are escaped properly.
-TEST(PrintWideCStringTest, EscapesProperly) {
-  const wchar_t s[] = {'\'', '"', '?', '\\', '\a', '\b', '\f', '\n', '\r',
-                       '\t', '\v', 0xD3, 0x576, 0x8D3, 0xC74D, ' ', 'a', '\0'};
-  EXPECT_EQ(PrintPointer(s) + " pointing to L\"'\\\"?\\\\\\a\\b\\f"
-            "\\n\\r\\t\\v\\xD3\\x576\\x8D3\\xC74D a\"",
-            Print(static_cast<const wchar_t*>(s)));
-}
-#endif  // native wchar_t
-
-// Tests printing pointers to other char types.
-
-// signed char*.
-TEST(PrintCharPointerTest, SignedChar) {
-  signed char* p = reinterpret_cast<signed char*>(0x1234);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// const signed char*.
-TEST(PrintCharPointerTest, ConstSignedChar) {
-  signed char* p = reinterpret_cast<signed char*>(0x1234);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// unsigned char*.
-TEST(PrintCharPointerTest, UnsignedChar) {
-  unsigned char* p = reinterpret_cast<unsigned char*>(0x1234);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// const unsigned char*.
-TEST(PrintCharPointerTest, ConstUnsignedChar) {
-  const unsigned char* p = reinterpret_cast<const unsigned char*>(0x1234);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests printing pointers to simple, built-in types.
-
-// bool*.
-TEST(PrintPointerToBuiltInTypeTest, Bool) {
-  bool* p = reinterpret_cast<bool*>(0xABCD);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// void*.
-TEST(PrintPointerToBuiltInTypeTest, Void) {
-  void* p = reinterpret_cast<void*>(0xABCD);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// const void*.
-TEST(PrintPointerToBuiltInTypeTest, ConstVoid) {
-  const void* p = reinterpret_cast<const void*>(0xABCD);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests printing pointers to pointers.
-TEST(PrintPointerToPointerTest, IntPointerPointer) {
-  int** p = reinterpret_cast<int**>(0xABCD);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests printing (non-member) function pointers.
-
-void MyFunction(int /* n */) {}
-
-TEST(PrintPointerTest, NonMemberFunctionPointer) {
-  // We cannot directly cast &MyFunction to const void* because the
-  // standard disallows casting between pointers to functions and
-  // pointers to objects, and some compilers (e.g. GCC 3.4) enforce
-  // this limitation.
-  EXPECT_EQ(
-      PrintPointer(reinterpret_cast<const void*>(
-          reinterpret_cast<internal::BiggestInt>(&MyFunction))),
-      Print(&MyFunction));
-  int (*p)(bool) = NULL;  // NOLINT
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// An assertion predicate determining whether a one string is a prefix for
-// another.
-template <typename StringType>
-AssertionResult HasPrefix(const StringType& str, const StringType& prefix) {
-  if (str.find(prefix, 0) == 0)
-    return AssertionSuccess();
-
-  const bool is_wide_string = sizeof(prefix[0]) > 1;
-  const char* const begin_string_quote = is_wide_string ? "L\"" : "\"";
-  return AssertionFailure()
-      << begin_string_quote << prefix << "\" is not a prefix of "
-      << begin_string_quote << str << "\"\n";
-}
-
-// Tests printing member variable pointers.  Although they are called
-// pointers, they don't point to a location in the address space.
-// Their representation is implementation-defined.  Thus they will be
-// printed as raw bytes.
-
-struct Foo {
- public:
-  virtual ~Foo() {}
-  int MyMethod(char x) { return x + 1; }
-  virtual char MyVirtualMethod(int /* n */) { return 'a'; }
-
-  int value;
-};
-
-TEST(PrintPointerTest, MemberVariablePointer) {
-  EXPECT_TRUE(HasPrefix(Print(&Foo::value),
-                        Print(sizeof(&Foo::value)) + "-byte object "));
-  int Foo::*p = NULL;  // NOLINT
-  EXPECT_TRUE(HasPrefix(Print(p),
-                        Print(sizeof(p)) + "-byte object "));
-}
-
-// Tests printing member function pointers.  Although they are called
-// pointers, they don't point to a location in the address space.
-// Their representation is implementation-defined.  Thus they will be
-// printed as raw bytes.
-TEST(PrintPointerTest, MemberFunctionPointer) {
-  EXPECT_TRUE(HasPrefix(Print(&Foo::MyMethod),
-                        Print(sizeof(&Foo::MyMethod)) + "-byte object "));
-  EXPECT_TRUE(
-      HasPrefix(Print(&Foo::MyVirtualMethod),
-                Print(sizeof((&Foo::MyVirtualMethod))) + "-byte object "));
-  int (Foo::*p)(char) = NULL;  // NOLINT
-  EXPECT_TRUE(HasPrefix(Print(p),
-                        Print(sizeof(p)) + "-byte object "));
-}
-
-// Tests printing C arrays.
-
-// The difference between this and Print() is that it ensures that the
-// argument is a reference to an array.
-template <typename T, size_t N>
-std::string PrintArrayHelper(T (&a)[N]) {
-  return Print(a);
-}
-
-// One-dimensional array.
-TEST(PrintArrayTest, OneDimensionalArray) {
-  int a[5] = { 1, 2, 3, 4, 5 };
-  EXPECT_EQ("{ 1, 2, 3, 4, 5 }", PrintArrayHelper(a));
-}
-
-// Two-dimensional array.
-TEST(PrintArrayTest, TwoDimensionalArray) {
-  int a[2][5] = {
-    { 1, 2, 3, 4, 5 },
-    { 6, 7, 8, 9, 0 }
-  };
-  EXPECT_EQ("{ { 1, 2, 3, 4, 5 }, { 6, 7, 8, 9, 0 } }", PrintArrayHelper(a));
-}
-
-// Array of const elements.
-TEST(PrintArrayTest, ConstArray) {
-  const bool a[1] = { false };
-  EXPECT_EQ("{ false }", PrintArrayHelper(a));
-}
-
-// char array without terminating NUL.
-TEST(PrintArrayTest, CharArrayWithNoTerminatingNul) {
-  // Array a contains '\0' in the middle and doesn't end with '\0'.
-  char a[] = { 'H', '\0', 'i' };
-  EXPECT_EQ("\"H\\0i\" (no terminating NUL)", PrintArrayHelper(a));
-}
-
-// const char array with terminating NUL.
-TEST(PrintArrayTest, ConstCharArrayWithTerminatingNul) {
-  const char a[] = "\0Hi";
-  EXPECT_EQ("\"\\0Hi\"", PrintArrayHelper(a));
-}
-
-// const wchar_t array without terminating NUL.
-TEST(PrintArrayTest, WCharArrayWithNoTerminatingNul) {
-  // Array a contains '\0' in the middle and doesn't end with '\0'.
-  const wchar_t a[] = { L'H', L'\0', L'i' };
-  EXPECT_EQ("L\"H\\0i\" (no terminating NUL)", PrintArrayHelper(a));
-}
-
-// wchar_t array with terminating NUL.
-TEST(PrintArrayTest, WConstCharArrayWithTerminatingNul) {
-  const wchar_t a[] = L"\0Hi";
-  EXPECT_EQ("L\"\\0Hi\"", PrintArrayHelper(a));
-}
-
-// Array of objects.
-TEST(PrintArrayTest, ObjectArray) {
-  std::string a[3] = {"Hi", "Hello", "Ni hao"};
-  EXPECT_EQ("{ \"Hi\", \"Hello\", \"Ni hao\" }", PrintArrayHelper(a));
-}
-
-// Array with many elements.
-TEST(PrintArrayTest, BigArray) {
-  int a[100] = { 1, 2, 3 };
-  EXPECT_EQ("{ 1, 2, 3, 0, 0, 0, 0, 0, ..., 0, 0, 0, 0, 0, 0, 0, 0 }",
-            PrintArrayHelper(a));
-}
-
-// Tests printing ::string and ::std::string.
-
-// ::std::string.
-TEST(PrintStringTest, StringInStdNamespace) {
-  const char s[] = "'\"?\\\a\b\f\n\0\r\t\v\x7F\xFF a";
-  const ::std::string str(s, sizeof(s));
-  EXPECT_EQ("\"'\\\"?\\\\\\a\\b\\f\\n\\0\\r\\t\\v\\x7F\\xFF a\\0\"",
-            Print(str));
-}
-
-TEST(PrintStringTest, StringAmbiguousHex) {
-  // "\x6BANANA" is ambiguous, it can be interpreted as starting with either of:
-  // '\x6', '\x6B', or '\x6BA'.
-
-  // a hex escaping sequence following by a decimal digit
-  EXPECT_EQ("\"0\\x12\" \"3\"", Print(::std::string("0\x12" "3")));
-  // a hex escaping sequence following by a hex digit (lower-case)
-  EXPECT_EQ("\"mm\\x6\" \"bananas\"", Print(::std::string("mm\x6" "bananas")));
-  // a hex escaping sequence following by a hex digit (upper-case)
-  EXPECT_EQ("\"NOM\\x6\" \"BANANA\"", Print(::std::string("NOM\x6" "BANANA")));
-  // a hex escaping sequence following by a non-xdigit
-  EXPECT_EQ("\"!\\x5-!\"", Print(::std::string("!\x5-!")));
-}
-
-// Tests printing ::std::wstring.
-#if GTEST_HAS_STD_WSTRING
-// ::std::wstring.
-TEST(PrintWideStringTest, StringInStdNamespace) {
-  const wchar_t s[] = L"'\"?\\\a\b\f\n\0\r\t\v\xD3\x576\x8D3\xC74D a";
-  const ::std::wstring str(s, sizeof(s)/sizeof(wchar_t));
-  EXPECT_EQ("L\"'\\\"?\\\\\\a\\b\\f\\n\\0\\r\\t\\v"
-            "\\xD3\\x576\\x8D3\\xC74D a\\0\"",
-            Print(str));
-}
-
-TEST(PrintWideStringTest, StringAmbiguousHex) {
-  // same for wide strings.
-  EXPECT_EQ("L\"0\\x12\" L\"3\"", Print(::std::wstring(L"0\x12" L"3")));
-  EXPECT_EQ("L\"mm\\x6\" L\"bananas\"",
-            Print(::std::wstring(L"mm\x6" L"bananas")));
-  EXPECT_EQ("L\"NOM\\x6\" L\"BANANA\"",
-            Print(::std::wstring(L"NOM\x6" L"BANANA")));
-  EXPECT_EQ("L\"!\\x5-!\"", Print(::std::wstring(L"!\x5-!")));
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Tests printing types that support generic streaming (i.e. streaming
-// to std::basic_ostream<Char, CharTraits> for any valid Char and
-// CharTraits types).
-
-// Tests printing a non-template type that supports generic streaming.
-
-class AllowsGenericStreaming {};
-
-template <typename Char, typename CharTraits>
-std::basic_ostream<Char, CharTraits>& operator<<(
-    std::basic_ostream<Char, CharTraits>& os,
-    const AllowsGenericStreaming& /* a */) {
-  return os << "AllowsGenericStreaming";
-}
-
-TEST(PrintTypeWithGenericStreamingTest, NonTemplateType) {
-  AllowsGenericStreaming a;
-  EXPECT_EQ("AllowsGenericStreaming", Print(a));
-}
-
-// Tests printing a template type that supports generic streaming.
-
-template <typename T>
-class AllowsGenericStreamingTemplate {};
-
-template <typename Char, typename CharTraits, typename T>
-std::basic_ostream<Char, CharTraits>& operator<<(
-    std::basic_ostream<Char, CharTraits>& os,
-    const AllowsGenericStreamingTemplate<T>& /* a */) {
-  return os << "AllowsGenericStreamingTemplate";
-}
-
-TEST(PrintTypeWithGenericStreamingTest, TemplateType) {
-  AllowsGenericStreamingTemplate<int> a;
-  EXPECT_EQ("AllowsGenericStreamingTemplate", Print(a));
-}
-
-// Tests printing a type that supports generic streaming and can be
-// implicitly converted to another printable type.
-
-template <typename T>
-class AllowsGenericStreamingAndImplicitConversionTemplate {
- public:
-  operator bool() const { return false; }
-};
-
-template <typename Char, typename CharTraits, typename T>
-std::basic_ostream<Char, CharTraits>& operator<<(
-    std::basic_ostream<Char, CharTraits>& os,
-    const AllowsGenericStreamingAndImplicitConversionTemplate<T>& /* a */) {
-  return os << "AllowsGenericStreamingAndImplicitConversionTemplate";
-}
-
-TEST(PrintTypeWithGenericStreamingTest, TypeImplicitlyConvertible) {
-  AllowsGenericStreamingAndImplicitConversionTemplate<int> a;
-  EXPECT_EQ("AllowsGenericStreamingAndImplicitConversionTemplate", Print(a));
-}
-
-#if GTEST_HAS_ABSL
-
-// Tests printing ::absl::string_view.
-
-TEST(PrintStringViewTest, SimpleStringView) {
-  const ::absl::string_view sp = "Hello";
-  EXPECT_EQ("\"Hello\"", Print(sp));
-}
-
-TEST(PrintStringViewTest, UnprintableCharacters) {
-  const char str[] = "NUL (\0) and \r\t";
-  const ::absl::string_view sp(str, sizeof(str) - 1);
-  EXPECT_EQ("\"NUL (\\0) and \\r\\t\"", Print(sp));
-}
-
-#endif  // GTEST_HAS_ABSL
-
-// Tests printing STL containers.
-
-TEST(PrintStlContainerTest, EmptyDeque) {
-  deque<char> empty;
-  EXPECT_EQ("{}", Print(empty));
-}
-
-TEST(PrintStlContainerTest, NonEmptyDeque) {
-  deque<int> non_empty;
-  non_empty.push_back(1);
-  non_empty.push_back(3);
-  EXPECT_EQ("{ 1, 3 }", Print(non_empty));
-}
-
-
-TEST(PrintStlContainerTest, OneElementHashMap) {
-  ::std::unordered_map<int, char> map1;
-  map1[1] = 'a';
-  EXPECT_EQ("{ (1, 'a' (97, 0x61)) }", Print(map1));
-}
-
-TEST(PrintStlContainerTest, HashMultiMap) {
-  ::std::unordered_multimap<int, bool> map1;
-  map1.insert(make_pair(5, true));
-  map1.insert(make_pair(5, false));
-
-  // Elements of hash_multimap can be printed in any order.
-  const std::string result = Print(map1);
-  EXPECT_TRUE(result == "{ (5, true), (5, false) }" ||
-              result == "{ (5, false), (5, true) }")
-                  << " where Print(map1) returns \"" << result << "\".";
-}
-
-
-
-TEST(PrintStlContainerTest, HashSet) {
-  ::std::unordered_set<int> set1;
-  set1.insert(1);
-  EXPECT_EQ("{ 1 }", Print(set1));
-}
-
-TEST(PrintStlContainerTest, HashMultiSet) {
-  const int kSize = 5;
-  int a[kSize] = { 1, 1, 2, 5, 1 };
-  ::std::unordered_multiset<int> set1(a, a + kSize);
-
-  // Elements of hash_multiset can be printed in any order.
-  const std::string result = Print(set1);
-  const std::string expected_pattern = "{ d, d, d, d, d }";  // d means a digit.
-
-  // Verifies the result matches the expected pattern; also extracts
-  // the numbers in the result.
-  ASSERT_EQ(expected_pattern.length(), result.length());
-  std::vector<int> numbers;
-  for (size_t i = 0; i != result.length(); i++) {
-    if (expected_pattern[i] == 'd') {
-      ASSERT_NE(isdigit(static_cast<unsigned char>(result[i])), 0);
-      numbers.push_back(result[i] - '0');
-    } else {
-      EXPECT_EQ(expected_pattern[i], result[i]) << " where result is "
-                                                << result;
-    }
-  }
-
-  // Makes sure the result contains the right numbers.
-  std::sort(numbers.begin(), numbers.end());
-  std::sort(a, a + kSize);
-  EXPECT_TRUE(std::equal(a, a + kSize, numbers.begin()));
-}
-
-
-TEST(PrintStlContainerTest, List) {
-  const std::string a[] = {"hello", "world"};
-  const list<std::string> strings(a, a + 2);
-  EXPECT_EQ("{ \"hello\", \"world\" }", Print(strings));
-}
-
-TEST(PrintStlContainerTest, Map) {
-  map<int, bool> map1;
-  map1[1] = true;
-  map1[5] = false;
-  map1[3] = true;
-  EXPECT_EQ("{ (1, true), (3, true), (5, false) }", Print(map1));
-}
-
-TEST(PrintStlContainerTest, MultiMap) {
-  multimap<bool, int> map1;
-  // The make_pair template function would deduce the type as
-  // pair<bool, int> here, and since the key part in a multimap has to
-  // be constant, without a templated ctor in the pair class (as in
-  // libCstd on Solaris), make_pair call would fail to compile as no
-  // implicit conversion is found.  Thus explicit typename is used
-  // here instead.
-  map1.insert(pair<const bool, int>(true, 0));
-  map1.insert(pair<const bool, int>(true, 1));
-  map1.insert(pair<const bool, int>(false, 2));
-  EXPECT_EQ("{ (false, 2), (true, 0), (true, 1) }", Print(map1));
-}
-
-TEST(PrintStlContainerTest, Set) {
-  const unsigned int a[] = { 3, 0, 5 };
-  set<unsigned int> set1(a, a + 3);
-  EXPECT_EQ("{ 0, 3, 5 }", Print(set1));
-}
-
-TEST(PrintStlContainerTest, MultiSet) {
-  const int a[] = { 1, 1, 2, 5, 1 };
-  multiset<int> set1(a, a + 5);
-  EXPECT_EQ("{ 1, 1, 1, 2, 5 }", Print(set1));
-}
-
-
-TEST(PrintStlContainerTest, SinglyLinkedList) {
-  int a[] = { 9, 2, 8 };
-  const std::forward_list<int> ints(a, a + 3);
-  EXPECT_EQ("{ 9, 2, 8 }", Print(ints));
-}
-
-TEST(PrintStlContainerTest, Pair) {
-  pair<const bool, int> p(true, 5);
-  EXPECT_EQ("(true, 5)", Print(p));
-}
-
-TEST(PrintStlContainerTest, Vector) {
-  vector<int> v;
-  v.push_back(1);
-  v.push_back(2);
-  EXPECT_EQ("{ 1, 2 }", Print(v));
-}
-
-TEST(PrintStlContainerTest, LongSequence) {
-  const int a[100] = { 1, 2, 3 };
-  const vector<int> v(a, a + 100);
-  EXPECT_EQ("{ 1, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, "
-            "0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ... }", Print(v));
-}
-
-TEST(PrintStlContainerTest, NestedContainer) {
-  const int a1[] = { 1, 2 };
-  const int a2[] = { 3, 4, 5 };
-  const list<int> l1(a1, a1 + 2);
-  const list<int> l2(a2, a2 + 3);
-
-  vector<list<int> > v;
-  v.push_back(l1);
-  v.push_back(l2);
-  EXPECT_EQ("{ { 1, 2 }, { 3, 4, 5 } }", Print(v));
-}
-
-TEST(PrintStlContainerTest, OneDimensionalNativeArray) {
-  const int a[3] = { 1, 2, 3 };
-  NativeArray<int> b(a, 3, RelationToSourceReference());
-  EXPECT_EQ("{ 1, 2, 3 }", Print(b));
-}
-
-TEST(PrintStlContainerTest, TwoDimensionalNativeArray) {
-  const int a[2][3] = { { 1, 2, 3 }, { 4, 5, 6 } };
-  NativeArray<int[3]> b(a, 2, RelationToSourceReference());
-  EXPECT_EQ("{ { 1, 2, 3 }, { 4, 5, 6 } }", Print(b));
-}
-
-// Tests that a class named iterator isn't treated as a container.
-
-struct iterator {
-  char x;
-};
-
-TEST(PrintStlContainerTest, Iterator) {
-  iterator it = {};
-  EXPECT_EQ("1-byte object <00>", Print(it));
-}
-
-// Tests that a class named const_iterator isn't treated as a container.
-
-struct const_iterator {
-  char x;
-};
-
-TEST(PrintStlContainerTest, ConstIterator) {
-  const_iterator it = {};
-  EXPECT_EQ("1-byte object <00>", Print(it));
-}
-
-// Tests printing ::std::tuples.
-
-// Tuples of various arities.
-TEST(PrintStdTupleTest, VariousSizes) {
-  ::std::tuple<> t0;
-  EXPECT_EQ("()", Print(t0));
-
-  ::std::tuple<int> t1(5);
-  EXPECT_EQ("(5)", Print(t1));
-
-  ::std::tuple<char, bool> t2('a', true);
-  EXPECT_EQ("('a' (97, 0x61), true)", Print(t2));
-
-  ::std::tuple<bool, int, int> t3(false, 2, 3);
-  EXPECT_EQ("(false, 2, 3)", Print(t3));
-
-  ::std::tuple<bool, int, int, int> t4(false, 2, 3, 4);
-  EXPECT_EQ("(false, 2, 3, 4)", Print(t4));
-
-  const char* const str = "8";
-  ::std::tuple<bool, char, short, testing::internal::Int32,  // NOLINT
-               testing::internal::Int64, float, double, const char*, void*,
-               std::string>
-      t10(false, 'a', static_cast<short>(3), 4, 5, 1.5F, -2.5, str,  // NOLINT
-          nullptr, "10");
-  EXPECT_EQ("(false, 'a' (97, 0x61), 3, 4, 5, 1.5, -2.5, " + PrintPointer(str) +
-            " pointing to \"8\", NULL, \"10\")",
-            Print(t10));
-}
-
-// Nested tuples.
-TEST(PrintStdTupleTest, NestedTuple) {
-  ::std::tuple< ::std::tuple<int, bool>, char> nested(
-      ::std::make_tuple(5, true), 'a');
-  EXPECT_EQ("((5, true), 'a' (97, 0x61))", Print(nested));
-}
-
-TEST(PrintNullptrT, Basic) {
-  EXPECT_EQ("(nullptr)", Print(nullptr));
-}
-
-TEST(PrintReferenceWrapper, Printable) {
-  int x = 5;
-  EXPECT_EQ("@" + PrintPointer(&x) + " 5", Print(std::ref(x)));
-  EXPECT_EQ("@" + PrintPointer(&x) + " 5", Print(std::cref(x)));
-}
-
-TEST(PrintReferenceWrapper, Unprintable) {
-  ::foo::UnprintableInFoo up;
-  EXPECT_EQ(
-      "@" + PrintPointer(&up) +
-          " 16-byte object <EF-12 00-00 34-AB 00-00 00-00 00-00 00-00 00-00>",
-      Print(std::ref(up)));
-  EXPECT_EQ(
-      "@" + PrintPointer(&up) +
-          " 16-byte object <EF-12 00-00 34-AB 00-00 00-00 00-00 00-00 00-00>",
-      Print(std::cref(up)));
-}
-
-// Tests printing user-defined unprintable types.
-
-// Unprintable types in the global namespace.
-TEST(PrintUnprintableTypeTest, InGlobalNamespace) {
-  EXPECT_EQ("1-byte object <00>",
-            Print(UnprintableTemplateInGlobal<char>()));
-}
-
-// Unprintable types in a user namespace.
-TEST(PrintUnprintableTypeTest, InUserNamespace) {
-  EXPECT_EQ("16-byte object <EF-12 00-00 34-AB 00-00 00-00 00-00 00-00 00-00>",
-            Print(::foo::UnprintableInFoo()));
-}
-
-// Unprintable types are that too big to be printed completely.
-
-struct Big {
-  Big() { memset(array, 0, sizeof(array)); }
-  char array[257];
-};
-
-TEST(PrintUnpritableTypeTest, BigObject) {
-  EXPECT_EQ("257-byte object <00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 ... 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00>",
-            Print(Big()));
-}
-
-// Tests printing user-defined streamable types.
-
-// Streamable types in the global namespace.
-TEST(PrintStreamableTypeTest, InGlobalNamespace) {
-  StreamableInGlobal x;
-  EXPECT_EQ("StreamableInGlobal", Print(x));
-  EXPECT_EQ("StreamableInGlobal*", Print(&x));
-}
-
-// Printable template types in a user namespace.
-TEST(PrintStreamableTypeTest, TemplateTypeInUserNamespace) {
-  EXPECT_EQ("StreamableTemplateInFoo: 0",
-            Print(::foo::StreamableTemplateInFoo<int>()));
-}
-
-// Tests printing a user-defined recursive container type that has a <<
-// operator.
-TEST(PrintStreamableTypeTest, PathLikeInUserNamespace) {
-  ::foo::PathLike x;
-  EXPECT_EQ("Streamable-PathLike", Print(x));
-  const ::foo::PathLike cx;
-  EXPECT_EQ("Streamable-PathLike", Print(cx));
-}
-
-// Tests printing user-defined types that have a PrintTo() function.
-TEST(PrintPrintableTypeTest, InUserNamespace) {
-  EXPECT_EQ("PrintableViaPrintTo: 0",
-            Print(::foo::PrintableViaPrintTo()));
-}
-
-// Tests printing a pointer to a user-defined type that has a <<
-// operator for its pointer.
-TEST(PrintPrintableTypeTest, PointerInUserNamespace) {
-  ::foo::PointerPrintable x;
-  EXPECT_EQ("PointerPrintable*", Print(&x));
-}
-
-// Tests printing user-defined class template that have a PrintTo() function.
-TEST(PrintPrintableTypeTest, TemplateInUserNamespace) {
-  EXPECT_EQ("PrintableViaPrintToTemplate: 5",
-            Print(::foo::PrintableViaPrintToTemplate<int>(5)));
-}
-
-// Tests that the universal printer prints both the address and the
-// value of a reference.
-TEST(PrintReferenceTest, PrintsAddressAndValue) {
-  int n = 5;
-  EXPECT_EQ("@" + PrintPointer(&n) + " 5", PrintByRef(n));
-
-  int a[2][3] = {
-    { 0, 1, 2 },
-    { 3, 4, 5 }
-  };
-  EXPECT_EQ("@" + PrintPointer(a) + " { { 0, 1, 2 }, { 3, 4, 5 } }",
-            PrintByRef(a));
-
-  const ::foo::UnprintableInFoo x;
-  EXPECT_EQ("@" + PrintPointer(&x) + " 16-byte object "
-            "<EF-12 00-00 34-AB 00-00 00-00 00-00 00-00 00-00>",
-            PrintByRef(x));
-}
-
-// Tests that the universal printer prints a function pointer passed by
-// reference.
-TEST(PrintReferenceTest, HandlesFunctionPointer) {
-  void (*fp)(int n) = &MyFunction;
-  const std::string fp_pointer_string =
-      PrintPointer(reinterpret_cast<const void*>(&fp));
-  // We cannot directly cast &MyFunction to const void* because the
-  // standard disallows casting between pointers to functions and
-  // pointers to objects, and some compilers (e.g. GCC 3.4) enforce
-  // this limitation.
-  const std::string fp_string = PrintPointer(reinterpret_cast<const void*>(
-      reinterpret_cast<internal::BiggestInt>(fp)));
-  EXPECT_EQ("@" + fp_pointer_string + " " + fp_string,
-            PrintByRef(fp));
-}
-
-// Tests that the universal printer prints a member function pointer
-// passed by reference.
-TEST(PrintReferenceTest, HandlesMemberFunctionPointer) {
-  int (Foo::*p)(char ch) = &Foo::MyMethod;
-  EXPECT_TRUE(HasPrefix(
-      PrintByRef(p),
-      "@" + PrintPointer(reinterpret_cast<const void*>(&p)) + " " +
-          Print(sizeof(p)) + "-byte object "));
-
-  char (Foo::*p2)(int n) = &Foo::MyVirtualMethod;
-  EXPECT_TRUE(HasPrefix(
-      PrintByRef(p2),
-      "@" + PrintPointer(reinterpret_cast<const void*>(&p2)) + " " +
-          Print(sizeof(p2)) + "-byte object "));
-}
-
-// Tests that the universal printer prints a member variable pointer
-// passed by reference.
-TEST(PrintReferenceTest, HandlesMemberVariablePointer) {
-  int Foo::*p = &Foo::value;  // NOLINT
-  EXPECT_TRUE(HasPrefix(
-      PrintByRef(p),
-      "@" + PrintPointer(&p) + " " + Print(sizeof(p)) + "-byte object "));
-}
-
-// Tests that FormatForComparisonFailureMessage(), which is used to print
-// an operand in a comparison assertion (e.g. ASSERT_EQ) when the assertion
-// fails, formats the operand in the desired way.
-
-// scalar
-TEST(FormatForComparisonFailureMessageTest, WorksForScalar) {
-  EXPECT_STREQ("123",
-               FormatForComparisonFailureMessage(123, 124).c_str());
-}
-
-// non-char pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForNonCharPointer) {
-  int n = 0;
-  EXPECT_EQ(PrintPointer(&n),
-            FormatForComparisonFailureMessage(&n, &n).c_str());
-}
-
-// non-char array
-TEST(FormatForComparisonFailureMessageTest, FormatsNonCharArrayAsPointer) {
-  // In expression 'array == x', 'array' is compared by pointer.
-  // Therefore we want to print an array operand as a pointer.
-  int n[] = { 1, 2, 3 };
-  EXPECT_EQ(PrintPointer(n),
-            FormatForComparisonFailureMessage(n, n).c_str());
-}
-
-// Tests formatting a char pointer when it's compared with another pointer.
-// In this case we want to print it as a raw pointer, as the comparison is by
-// pointer.
-
-// char pointer vs pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForCharPointerVsPointer) {
-  // In expression 'p == x', where 'p' and 'x' are (const or not) char
-  // pointers, the operands are compared by pointer.  Therefore we
-  // want to print 'p' as a pointer instead of a C string (we don't
-  // even know if it's supposed to point to a valid C string).
-
-  // const char*
-  const char* s = "hello";
-  EXPECT_EQ(PrintPointer(s),
-            FormatForComparisonFailureMessage(s, s).c_str());
-
-  // char*
-  char ch = 'a';
-  EXPECT_EQ(PrintPointer(&ch),
-            FormatForComparisonFailureMessage(&ch, &ch).c_str());
-}
-
-// wchar_t pointer vs pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharPointerVsPointer) {
-  // In expression 'p == x', where 'p' and 'x' are (const or not) char
-  // pointers, the operands are compared by pointer.  Therefore we
-  // want to print 'p' as a pointer instead of a wide C string (we don't
-  // even know if it's supposed to point to a valid wide C string).
-
-  // const wchar_t*
-  const wchar_t* s = L"hello";
-  EXPECT_EQ(PrintPointer(s),
-            FormatForComparisonFailureMessage(s, s).c_str());
-
-  // wchar_t*
-  wchar_t ch = L'a';
-  EXPECT_EQ(PrintPointer(&ch),
-            FormatForComparisonFailureMessage(&ch, &ch).c_str());
-}
-
-// Tests formatting a char pointer when it's compared to a string object.
-// In this case we want to print the char pointer as a C string.
-
-// char pointer vs std::string
-TEST(FormatForComparisonFailureMessageTest, WorksForCharPointerVsStdString) {
-  const char* s = "hello \"world";
-  EXPECT_STREQ("\"hello \\\"world\"",  // The string content should be escaped.
-               FormatForComparisonFailureMessage(s, ::std::string()).c_str());
-
-  // char*
-  char str[] = "hi\1";
-  char* p = str;
-  EXPECT_STREQ("\"hi\\x1\"",  // The string content should be escaped.
-               FormatForComparisonFailureMessage(p, ::std::string()).c_str());
-}
-
-#if GTEST_HAS_STD_WSTRING
-// wchar_t pointer vs std::wstring
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharPointerVsStdWString) {
-  const wchar_t* s = L"hi \"world";
-  EXPECT_STREQ("L\"hi \\\"world\"",  // The string content should be escaped.
-               FormatForComparisonFailureMessage(s, ::std::wstring()).c_str());
-
-  // wchar_t*
-  wchar_t str[] = L"hi\1";
-  wchar_t* p = str;
-  EXPECT_STREQ("L\"hi\\x1\"",  // The string content should be escaped.
-               FormatForComparisonFailureMessage(p, ::std::wstring()).c_str());
-}
-#endif
-
-// Tests formatting a char array when it's compared with a pointer or array.
-// In this case we want to print the array as a row pointer, as the comparison
-// is by pointer.
-
-// char array vs pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForCharArrayVsPointer) {
-  char str[] = "hi \"world\"";
-  char* p = nullptr;
-  EXPECT_EQ(PrintPointer(str),
-            FormatForComparisonFailureMessage(str, p).c_str());
-}
-
-// char array vs char array
-TEST(FormatForComparisonFailureMessageTest, WorksForCharArrayVsCharArray) {
-  const char str[] = "hi \"world\"";
-  EXPECT_EQ(PrintPointer(str),
-            FormatForComparisonFailureMessage(str, str).c_str());
-}
-
-// wchar_t array vs pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharArrayVsPointer) {
-  wchar_t str[] = L"hi \"world\"";
-  wchar_t* p = nullptr;
-  EXPECT_EQ(PrintPointer(str),
-            FormatForComparisonFailureMessage(str, p).c_str());
-}
-
-// wchar_t array vs wchar_t array
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharArrayVsWCharArray) {
-  const wchar_t str[] = L"hi \"world\"";
-  EXPECT_EQ(PrintPointer(str),
-            FormatForComparisonFailureMessage(str, str).c_str());
-}
-
-// Tests formatting a char array when it's compared with a string object.
-// In this case we want to print the array as a C string.
-
-// char array vs std::string
-TEST(FormatForComparisonFailureMessageTest, WorksForCharArrayVsStdString) {
-  const char str[] = "hi \"world\"";
-  EXPECT_STREQ("\"hi \\\"world\\\"\"",  // The content should be escaped.
-               FormatForComparisonFailureMessage(str, ::std::string()).c_str());
-}
-
-#if GTEST_HAS_STD_WSTRING
-// wchar_t array vs std::wstring
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharArrayVsStdWString) {
-  const wchar_t str[] = L"hi \"w\0rld\"";
-  EXPECT_STREQ(
-      "L\"hi \\\"w\"",  // The content should be escaped.
-                        // Embedded NUL terminates the string.
-      FormatForComparisonFailureMessage(str, ::std::wstring()).c_str());
-}
-#endif
-
-// Useful for testing PrintToString().  We cannot use EXPECT_EQ()
-// there as its implementation uses PrintToString().  The caller must
-// ensure that 'value' has no side effect.
-#define EXPECT_PRINT_TO_STRING_(value, expected_string)         \
-  EXPECT_TRUE(PrintToString(value) == (expected_string))        \
-      << " where " #value " prints as " << (PrintToString(value))
-
-TEST(PrintToStringTest, WorksForScalar) {
-  EXPECT_PRINT_TO_STRING_(123, "123");
-}
-
-TEST(PrintToStringTest, WorksForPointerToConstChar) {
-  const char* p = "hello";
-  EXPECT_PRINT_TO_STRING_(p, "\"hello\"");
-}
-
-TEST(PrintToStringTest, WorksForPointerToNonConstChar) {
-  char s[] = "hello";
-  char* p = s;
-  EXPECT_PRINT_TO_STRING_(p, "\"hello\"");
-}
-
-TEST(PrintToStringTest, EscapesForPointerToConstChar) {
-  const char* p = "hello\n";
-  EXPECT_PRINT_TO_STRING_(p, "\"hello\\n\"");
-}
-
-TEST(PrintToStringTest, EscapesForPointerToNonConstChar) {
-  char s[] = "hello\1";
-  char* p = s;
-  EXPECT_PRINT_TO_STRING_(p, "\"hello\\x1\"");
-}
-
-TEST(PrintToStringTest, WorksForArray) {
-  int n[3] = { 1, 2, 3 };
-  EXPECT_PRINT_TO_STRING_(n, "{ 1, 2, 3 }");
-}
-
-TEST(PrintToStringTest, WorksForCharArray) {
-  char s[] = "hello";
-  EXPECT_PRINT_TO_STRING_(s, "\"hello\"");
-}
-
-TEST(PrintToStringTest, WorksForCharArrayWithEmbeddedNul) {
-  const char str_with_nul[] = "hello\0 world";
-  EXPECT_PRINT_TO_STRING_(str_with_nul, "\"hello\\0 world\"");
-
-  char mutable_str_with_nul[] = "hello\0 world";
-  EXPECT_PRINT_TO_STRING_(mutable_str_with_nul, "\"hello\\0 world\"");
-}
-
-  TEST(PrintToStringTest, ContainsNonLatin) {
-  // Sanity test with valid UTF-8. Prints both in hex and as text.
-  std::string non_ascii_str = ::std::string("오전 4:30");
-  EXPECT_PRINT_TO_STRING_(non_ascii_str,
-                          "\"\\xEC\\x98\\xA4\\xEC\\xA0\\x84 4:30\"\n"
-                          "    As Text: \"오전 4:30\"");
-  non_ascii_str = ::std::string("From ä — ẑ");
-  EXPECT_PRINT_TO_STRING_(non_ascii_str,
-                          "\"From \\xC3\\xA4 \\xE2\\x80\\x94 \\xE1\\xBA\\x91\""
-                          "\n    As Text: \"From ä — ẑ\"");
-}
-
-TEST(IsValidUTF8Test, IllFormedUTF8) {
-  // The following test strings are ill-formed UTF-8 and are printed
-  // as hex only (or ASCII, in case of ASCII bytes) because IsValidUTF8() is
-  // expected to fail, thus output does not contain "As Text:".
-
-  static const char *const kTestdata[][2] = {
-    // 2-byte lead byte followed by a single-byte character.
-    {"\xC3\x74", "\"\\xC3t\""},
-    // Valid 2-byte character followed by an orphan trail byte.
-    {"\xC3\x84\xA4", "\"\\xC3\\x84\\xA4\""},
-    // Lead byte without trail byte.
-    {"abc\xC3", "\"abc\\xC3\""},
-    // 3-byte lead byte, single-byte character, orphan trail byte.
-    {"x\xE2\x70\x94", "\"x\\xE2p\\x94\""},
-    // Truncated 3-byte character.
-    {"\xE2\x80", "\"\\xE2\\x80\""},
-    // Truncated 3-byte character followed by valid 2-byte char.
-    {"\xE2\x80\xC3\x84", "\"\\xE2\\x80\\xC3\\x84\""},
-    // Truncated 3-byte character followed by a single-byte character.
-    {"\xE2\x80\x7A", "\"\\xE2\\x80z\""},
-    // 3-byte lead byte followed by valid 3-byte character.
-    {"\xE2\xE2\x80\x94", "\"\\xE2\\xE2\\x80\\x94\""},
-    // 4-byte lead byte followed by valid 3-byte character.
-    {"\xF0\xE2\x80\x94", "\"\\xF0\\xE2\\x80\\x94\""},
-    // Truncated 4-byte character.
-    {"\xF0\xE2\x80", "\"\\xF0\\xE2\\x80\""},
-     // Invalid UTF-8 byte sequences embedded in other chars.
-    {"abc\xE2\x80\x94\xC3\x74xyc", "\"abc\\xE2\\x80\\x94\\xC3txyc\""},
-    {"abc\xC3\x84\xE2\x80\xC3\x84xyz",
-     "\"abc\\xC3\\x84\\xE2\\x80\\xC3\\x84xyz\""},
-    // Non-shortest UTF-8 byte sequences are also ill-formed.
-    // The classics: xC0, xC1 lead byte.
-    {"\xC0\x80", "\"\\xC0\\x80\""},
-    {"\xC1\x81", "\"\\xC1\\x81\""},
-    // Non-shortest sequences.
-    {"\xE0\x80\x80", "\"\\xE0\\x80\\x80\""},
-    {"\xf0\x80\x80\x80", "\"\\xF0\\x80\\x80\\x80\""},
-    // Last valid code point before surrogate range, should be printed as text,
-    // too.
-    {"\xED\x9F\xBF", "\"\\xED\\x9F\\xBF\"\n    As Text: \"퟿\""},
-    // Start of surrogate lead. Surrogates are not printed as text.
-    {"\xED\xA0\x80", "\"\\xED\\xA0\\x80\""},
-    // Last non-private surrogate lead.
-    {"\xED\xAD\xBF", "\"\\xED\\xAD\\xBF\""},
-    // First private-use surrogate lead.
-    {"\xED\xAE\x80", "\"\\xED\\xAE\\x80\""},
-    // Last private-use surrogate lead.
-    {"\xED\xAF\xBF", "\"\\xED\\xAF\\xBF\""},
-    // Mid-point of surrogate trail.
-    {"\xED\xB3\xBF", "\"\\xED\\xB3\\xBF\""},
-    // First valid code point after surrogate range, should be printed as text,
-    // too.
-    {"\xEE\x80\x80", "\"\\xEE\\x80\\x80\"\n    As Text: \"\""}
-  };
-
-  for (int i = 0; i < int(sizeof(kTestdata)/sizeof(kTestdata[0])); ++i) {
-    EXPECT_PRINT_TO_STRING_(kTestdata[i][0], kTestdata[i][1]);
-  }
-}
-
-#undef EXPECT_PRINT_TO_STRING_
-
-TEST(UniversalTersePrintTest, WorksForNonReference) {
-  ::std::stringstream ss;
-  UniversalTersePrint(123, &ss);
-  EXPECT_EQ("123", ss.str());
-}
-
-TEST(UniversalTersePrintTest, WorksForReference) {
-  const int& n = 123;
-  ::std::stringstream ss;
-  UniversalTersePrint(n, &ss);
-  EXPECT_EQ("123", ss.str());
-}
-
-TEST(UniversalTersePrintTest, WorksForCString) {
-  const char* s1 = "abc";
-  ::std::stringstream ss1;
-  UniversalTersePrint(s1, &ss1);
-  EXPECT_EQ("\"abc\"", ss1.str());
-
-  char* s2 = const_cast<char*>(s1);
-  ::std::stringstream ss2;
-  UniversalTersePrint(s2, &ss2);
-  EXPECT_EQ("\"abc\"", ss2.str());
-
-  const char* s3 = nullptr;
-  ::std::stringstream ss3;
-  UniversalTersePrint(s3, &ss3);
-  EXPECT_EQ("NULL", ss3.str());
-}
-
-TEST(UniversalPrintTest, WorksForNonReference) {
-  ::std::stringstream ss;
-  UniversalPrint(123, &ss);
-  EXPECT_EQ("123", ss.str());
-}
-
-TEST(UniversalPrintTest, WorksForReference) {
-  const int& n = 123;
-  ::std::stringstream ss;
-  UniversalPrint(n, &ss);
-  EXPECT_EQ("123", ss.str());
-}
-
-TEST(UniversalPrintTest, WorksForCString) {
-  const char* s1 = "abc";
-  ::std::stringstream ss1;
-  UniversalPrint(s1, &ss1);
-  EXPECT_EQ(PrintPointer(s1) + " pointing to \"abc\"", std::string(ss1.str()));
-
-  char* s2 = const_cast<char*>(s1);
-  ::std::stringstream ss2;
-  UniversalPrint(s2, &ss2);
-  EXPECT_EQ(PrintPointer(s2) + " pointing to \"abc\"", std::string(ss2.str()));
-
-  const char* s3 = nullptr;
-  ::std::stringstream ss3;
-  UniversalPrint(s3, &ss3);
-  EXPECT_EQ("NULL", ss3.str());
-}
-
-TEST(UniversalPrintTest, WorksForCharArray) {
-  const char str[] = "\"Line\0 1\"\nLine 2";
-  ::std::stringstream ss1;
-  UniversalPrint(str, &ss1);
-  EXPECT_EQ("\"\\\"Line\\0 1\\\"\\nLine 2\"", ss1.str());
-
-  const char mutable_str[] = "\"Line\0 1\"\nLine 2";
-  ::std::stringstream ss2;
-  UniversalPrint(mutable_str, &ss2);
-  EXPECT_EQ("\"\\\"Line\\0 1\\\"\\nLine 2\"", ss2.str());
-}
-
-TEST(UniversalTersePrintTupleFieldsToStringsTestWithStd, PrintsEmptyTuple) {
-  Strings result = UniversalTersePrintTupleFieldsToStrings(::std::make_tuple());
-  EXPECT_EQ(0u, result.size());
-}
-
-TEST(UniversalTersePrintTupleFieldsToStringsTestWithStd, PrintsOneTuple) {
-  Strings result = UniversalTersePrintTupleFieldsToStrings(
-      ::std::make_tuple(1));
-  ASSERT_EQ(1u, result.size());
-  EXPECT_EQ("1", result[0]);
-}
-
-TEST(UniversalTersePrintTupleFieldsToStringsTestWithStd, PrintsTwoTuple) {
-  Strings result = UniversalTersePrintTupleFieldsToStrings(
-      ::std::make_tuple(1, 'a'));
-  ASSERT_EQ(2u, result.size());
-  EXPECT_EQ("1", result[0]);
-  EXPECT_EQ("'a' (97, 0x61)", result[1]);
-}
-
-TEST(UniversalTersePrintTupleFieldsToStringsTestWithStd, PrintsTersely) {
-  const int n = 1;
-  Strings result = UniversalTersePrintTupleFieldsToStrings(
-      ::std::tuple<const int&, const char*>(n, "a"));
-  ASSERT_EQ(2u, result.size());
-  EXPECT_EQ("1", result[0]);
-  EXPECT_EQ("\"a\"", result[1]);
-}
-
-#if GTEST_HAS_ABSL
-
-TEST(PrintOptionalTest, Basic) {
-  absl::optional<int> value;
-  EXPECT_EQ("(nullopt)", PrintToString(value));
-  value = {7};
-  EXPECT_EQ("(7)", PrintToString(value));
-  EXPECT_EQ("(1.1)", PrintToString(absl::optional<double>{1.1}));
-  EXPECT_EQ("(\"A\")", PrintToString(absl::optional<std::string>{"A"}));
-}
-
-struct NonPrintable {
-  unsigned char contents = 17;
-};
-
-TEST(PrintOneofTest, Basic) {
-  using Type = absl::variant<int, StreamableInGlobal, NonPrintable>;
-  EXPECT_EQ("('int' with value 7)", PrintToString(Type(7)));
-  EXPECT_EQ("('StreamableInGlobal' with value StreamableInGlobal)",
-            PrintToString(Type(StreamableInGlobal{})));
-  EXPECT_EQ(
-      "('testing::gtest_printers_test::NonPrintable' with value 1-byte object "
-      "<11>)",
-      PrintToString(Type(NonPrintable{})));
-}
-#endif  // GTEST_HAS_ABSL
-namespace {
-class string_ref;
-
-/**
- * This is a synthetic pointer to a fixed size string.
- */
-class string_ptr {
- public:
-  string_ptr(const char* data, size_t size) : data_(data), size_(size) {}
-
-  string_ptr& operator++() noexcept {
-    data_ += size_;
-    return *this;
-  }
-
-  string_ref operator*() const noexcept;
-
- private:
-  const char* data_;
-  size_t size_;
-};
-
-/**
- * This is a synthetic reference of a fixed size string.
- */
-class string_ref {
- public:
-  string_ref(const char* data, size_t size) : data_(data), size_(size) {}
-
-  string_ptr operator&() const noexcept { return {data_, size_}; }  // NOLINT
-
-  bool operator==(const char* s) const noexcept {
-    if (size_ > 0 && data_[size_ - 1] != 0) {
-      return std::string(data_, size_) == std::string(s);
-    } else {
-      return std::string(data_) == std::string(s);
-    }
-  }
-
- private:
-  const char* data_;
-  size_t size_;
-};
-
-string_ref string_ptr::operator*() const noexcept { return {data_, size_}; }
-
-TEST(string_ref, compare) {
-  const char* s = "alex\0davidjohn\0";
-  string_ptr ptr(s, 5);
-  EXPECT_EQ(*ptr, "alex");
-  EXPECT_TRUE(*ptr == "alex");
-  ++ptr;
-  EXPECT_EQ(*ptr, "david");
-  EXPECT_TRUE(*ptr == "david");
-  ++ptr;
-  EXPECT_EQ(*ptr, "john");
-}
-
-}  // namespace
-
-}  // namespace gtest_printers_test
-}  // namespace testing
diff --git a/3rdparty/gtest/test/googletest-shuffle-test.py b/3rdparty/gtest/test/googletest-shuffle-test.py
deleted file mode 100644
index 573cc5ec..00000000
--- a/3rdparty/gtest/test/googletest-shuffle-test.py
+++ /dev/null
@@ -1,323 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that test shuffling works."""
-
-import os
-import gtest_test_utils
-
-# Command to run the googletest-shuffle-test_ program.
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-shuffle-test_')
-
-# The environment variables for test sharding.
-TOTAL_SHARDS_ENV_VAR = 'GTEST_TOTAL_SHARDS'
-SHARD_INDEX_ENV_VAR = 'GTEST_SHARD_INDEX'
-
-TEST_FILTER = 'A*.A:A*.B:C*'
-
-ALL_TESTS = []
-ACTIVE_TESTS = []
-FILTERED_TESTS = []
-SHARDED_TESTS = []
-
-SHUFFLED_ALL_TESTS = []
-SHUFFLED_ACTIVE_TESTS = []
-SHUFFLED_FILTERED_TESTS = []
-SHUFFLED_SHARDED_TESTS = []
-
-
-def AlsoRunDisabledTestsFlag():
-  return '--gtest_also_run_disabled_tests'
-
-
-def FilterFlag(test_filter):
-  return '--gtest_filter=%s' % (test_filter,)
-
-
-def RepeatFlag(n):
-  return '--gtest_repeat=%s' % (n,)
-
-
-def ShuffleFlag():
-  return '--gtest_shuffle'
-
-
-def RandomSeedFlag(n):
-  return '--gtest_random_seed=%s' % (n,)
-
-
-def RunAndReturnOutput(extra_env, args):
-  """Runs the test program and returns its output."""
-
-  environ_copy = os.environ.copy()
-  environ_copy.update(extra_env)
-
-  return gtest_test_utils.Subprocess([COMMAND] + args, env=environ_copy).output
-
-
-def GetTestsForAllIterations(extra_env, args):
-  """Runs the test program and returns a list of test lists.
-
-  Args:
-    extra_env: a map from environment variables to their values
-    args: command line flags to pass to googletest-shuffle-test_
-
-  Returns:
-    A list where the i-th element is the list of tests run in the i-th
-    test iteration.
-  """
-
-  test_iterations = []
-  for line in RunAndReturnOutput(extra_env, args).split('\n'):
-    if line.startswith('----'):
-      tests = []
-      test_iterations.append(tests)
-    elif line.strip():
-      tests.append(line.strip())  # 'TestCaseName.TestName'
-
-  return test_iterations
-
-
-def GetTestCases(tests):
-  """Returns a list of test cases in the given full test names.
-
-  Args:
-    tests: a list of full test names
-
-  Returns:
-    A list of test cases from 'tests', in their original order.
-    Consecutive duplicates are removed.
-  """
-
-  test_cases = []
-  for test in tests:
-    test_case = test.split('.')[0]
-    if not test_case in test_cases:
-      test_cases.append(test_case)
-
-  return test_cases
-
-
-def CalculateTestLists():
-  """Calculates the list of tests run under different flags."""
-
-  if not ALL_TESTS:
-    ALL_TESTS.extend(
-        GetTestsForAllIterations({}, [AlsoRunDisabledTestsFlag()])[0])
-
-  if not ACTIVE_TESTS:
-    ACTIVE_TESTS.extend(GetTestsForAllIterations({}, [])[0])
-
-  if not FILTERED_TESTS:
-    FILTERED_TESTS.extend(
-        GetTestsForAllIterations({}, [FilterFlag(TEST_FILTER)])[0])
-
-  if not SHARDED_TESTS:
-    SHARDED_TESTS.extend(
-        GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                  SHARD_INDEX_ENV_VAR: '1'},
-                                 [])[0])
-
-  if not SHUFFLED_ALL_TESTS:
-    SHUFFLED_ALL_TESTS.extend(GetTestsForAllIterations(
-        {}, [AlsoRunDisabledTestsFlag(), ShuffleFlag(), RandomSeedFlag(1)])[0])
-
-  if not SHUFFLED_ACTIVE_TESTS:
-    SHUFFLED_ACTIVE_TESTS.extend(GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(1)])[0])
-
-  if not SHUFFLED_FILTERED_TESTS:
-    SHUFFLED_FILTERED_TESTS.extend(GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(1), FilterFlag(TEST_FILTER)])[0])
-
-  if not SHUFFLED_SHARDED_TESTS:
-    SHUFFLED_SHARDED_TESTS.extend(
-        GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                  SHARD_INDEX_ENV_VAR: '1'},
-                                 [ShuffleFlag(), RandomSeedFlag(1)])[0])
-
-
-class GTestShuffleUnitTest(gtest_test_utils.TestCase):
-  """Tests test shuffling."""
-
-  def setUp(self):
-    CalculateTestLists()
-
-  def testShufflePreservesNumberOfTests(self):
-    self.assertEqual(len(ALL_TESTS), len(SHUFFLED_ALL_TESTS))
-    self.assertEqual(len(ACTIVE_TESTS), len(SHUFFLED_ACTIVE_TESTS))
-    self.assertEqual(len(FILTERED_TESTS), len(SHUFFLED_FILTERED_TESTS))
-    self.assertEqual(len(SHARDED_TESTS), len(SHUFFLED_SHARDED_TESTS))
-
-  def testShuffleChangesTestOrder(self):
-    self.assert_(SHUFFLED_ALL_TESTS != ALL_TESTS, SHUFFLED_ALL_TESTS)
-    self.assert_(SHUFFLED_ACTIVE_TESTS != ACTIVE_TESTS, SHUFFLED_ACTIVE_TESTS)
-    self.assert_(SHUFFLED_FILTERED_TESTS != FILTERED_TESTS,
-                 SHUFFLED_FILTERED_TESTS)
-    self.assert_(SHUFFLED_SHARDED_TESTS != SHARDED_TESTS,
-                 SHUFFLED_SHARDED_TESTS)
-
-  def testShuffleChangesTestCaseOrder(self):
-    self.assert_(GetTestCases(SHUFFLED_ALL_TESTS) != GetTestCases(ALL_TESTS),
-                 GetTestCases(SHUFFLED_ALL_TESTS))
-    self.assert_(
-        GetTestCases(SHUFFLED_ACTIVE_TESTS) != GetTestCases(ACTIVE_TESTS),
-        GetTestCases(SHUFFLED_ACTIVE_TESTS))
-    self.assert_(
-        GetTestCases(SHUFFLED_FILTERED_TESTS) != GetTestCases(FILTERED_TESTS),
-        GetTestCases(SHUFFLED_FILTERED_TESTS))
-    self.assert_(
-        GetTestCases(SHUFFLED_SHARDED_TESTS) != GetTestCases(SHARDED_TESTS),
-        GetTestCases(SHUFFLED_SHARDED_TESTS))
-
-  def testShuffleDoesNotRepeatTest(self):
-    for test in SHUFFLED_ALL_TESTS:
-      self.assertEqual(1, SHUFFLED_ALL_TESTS.count(test),
-                       '%s appears more than once' % (test,))
-    for test in SHUFFLED_ACTIVE_TESTS:
-      self.assertEqual(1, SHUFFLED_ACTIVE_TESTS.count(test),
-                       '%s appears more than once' % (test,))
-    for test in SHUFFLED_FILTERED_TESTS:
-      self.assertEqual(1, SHUFFLED_FILTERED_TESTS.count(test),
-                       '%s appears more than once' % (test,))
-    for test in SHUFFLED_SHARDED_TESTS:
-      self.assertEqual(1, SHUFFLED_SHARDED_TESTS.count(test),
-                       '%s appears more than once' % (test,))
-
-  def testShuffleDoesNotCreateNewTest(self):
-    for test in SHUFFLED_ALL_TESTS:
-      self.assert_(test in ALL_TESTS, '%s is an invalid test' % (test,))
-    for test in SHUFFLED_ACTIVE_TESTS:
-      self.assert_(test in ACTIVE_TESTS, '%s is an invalid test' % (test,))
-    for test in SHUFFLED_FILTERED_TESTS:
-      self.assert_(test in FILTERED_TESTS, '%s is an invalid test' % (test,))
-    for test in SHUFFLED_SHARDED_TESTS:
-      self.assert_(test in SHARDED_TESTS, '%s is an invalid test' % (test,))
-
-  def testShuffleIncludesAllTests(self):
-    for test in ALL_TESTS:
-      self.assert_(test in SHUFFLED_ALL_TESTS, '%s is missing' % (test,))
-    for test in ACTIVE_TESTS:
-      self.assert_(test in SHUFFLED_ACTIVE_TESTS, '%s is missing' % (test,))
-    for test in FILTERED_TESTS:
-      self.assert_(test in SHUFFLED_FILTERED_TESTS, '%s is missing' % (test,))
-    for test in SHARDED_TESTS:
-      self.assert_(test in SHUFFLED_SHARDED_TESTS, '%s is missing' % (test,))
-
-  def testShuffleLeavesDeathTestsAtFront(self):
-    non_death_test_found = False
-    for test in SHUFFLED_ACTIVE_TESTS:
-      if 'DeathTest.' in test:
-        self.assert_(not non_death_test_found,
-                     '%s appears after a non-death test' % (test,))
-      else:
-        non_death_test_found = True
-
-  def _VerifyTestCasesDoNotInterleave(self, tests):
-    test_cases = []
-    for test in tests:
-      [test_case, _] = test.split('.')
-      if test_cases and test_cases[-1] != test_case:
-        test_cases.append(test_case)
-        self.assertEqual(1, test_cases.count(test_case),
-                         'Test case %s is not grouped together in %s' %
-                         (test_case, tests))
-
-  def testShuffleDoesNotInterleaveTestCases(self):
-    self._VerifyTestCasesDoNotInterleave(SHUFFLED_ALL_TESTS)
-    self._VerifyTestCasesDoNotInterleave(SHUFFLED_ACTIVE_TESTS)
-    self._VerifyTestCasesDoNotInterleave(SHUFFLED_FILTERED_TESTS)
-    self._VerifyTestCasesDoNotInterleave(SHUFFLED_SHARDED_TESTS)
-
-  def testShuffleRestoresOrderAfterEachIteration(self):
-    # Get the test lists in all 3 iterations, using random seed 1, 2,
-    # and 3 respectively.  Google Test picks a different seed in each
-    # iteration, and this test depends on the current implementation
-    # picking successive numbers.  This dependency is not ideal, but
-    # makes the test much easier to write.
-    [tests_in_iteration1, tests_in_iteration2, tests_in_iteration3] = (
-        GetTestsForAllIterations(
-            {}, [ShuffleFlag(), RandomSeedFlag(1), RepeatFlag(3)]))
-
-    # Make sure running the tests with random seed 1 gets the same
-    # order as in iteration 1 above.
-    [tests_with_seed1] = GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(1)])
-    self.assertEqual(tests_in_iteration1, tests_with_seed1)
-
-    # Make sure running the tests with random seed 2 gets the same
-    # order as in iteration 2 above.  Success means that Google Test
-    # correctly restores the test order before re-shuffling at the
-    # beginning of iteration 2.
-    [tests_with_seed2] = GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(2)])
-    self.assertEqual(tests_in_iteration2, tests_with_seed2)
-
-    # Make sure running the tests with random seed 3 gets the same
-    # order as in iteration 3 above.  Success means that Google Test
-    # correctly restores the test order before re-shuffling at the
-    # beginning of iteration 3.
-    [tests_with_seed3] = GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(3)])
-    self.assertEqual(tests_in_iteration3, tests_with_seed3)
-
-  def testShuffleGeneratesNewOrderInEachIteration(self):
-    [tests_in_iteration1, tests_in_iteration2, tests_in_iteration3] = (
-        GetTestsForAllIterations(
-            {}, [ShuffleFlag(), RandomSeedFlag(1), RepeatFlag(3)]))
-
-    self.assert_(tests_in_iteration1 != tests_in_iteration2,
-                 tests_in_iteration1)
-    self.assert_(tests_in_iteration1 != tests_in_iteration3,
-                 tests_in_iteration1)
-    self.assert_(tests_in_iteration2 != tests_in_iteration3,
-                 tests_in_iteration2)
-
-  def testShuffleShardedTestsPreservesPartition(self):
-    # If we run M tests on N shards, the same M tests should be run in
-    # total, regardless of the random seeds used by the shards.
-    [tests1] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                         SHARD_INDEX_ENV_VAR: '0'},
-                                        [ShuffleFlag(), RandomSeedFlag(1)])
-    [tests2] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                         SHARD_INDEX_ENV_VAR: '1'},
-                                        [ShuffleFlag(), RandomSeedFlag(20)])
-    [tests3] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                         SHARD_INDEX_ENV_VAR: '2'},
-                                        [ShuffleFlag(), RandomSeedFlag(25)])
-    sorted_sharded_tests = tests1 + tests2 + tests3
-    sorted_sharded_tests.sort()
-    sorted_active_tests = []
-    sorted_active_tests.extend(ACTIVE_TESTS)
-    sorted_active_tests.sort()
-    self.assertEqual(sorted_active_tests, sorted_sharded_tests)
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-shuffle-test_.cc b/3rdparty/gtest/test/googletest-shuffle-test_.cc
deleted file mode 100644
index c1fc1066..00000000
--- a/3rdparty/gtest/test/googletest-shuffle-test_.cc
+++ /dev/null
@@ -1,101 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Verifies that test shuffling works.
-
-#include "gtest/gtest.h"
-
-namespace {
-
-using ::testing::EmptyTestEventListener;
-using ::testing::InitGoogleTest;
-using ::testing::Message;
-using ::testing::Test;
-using ::testing::TestEventListeners;
-using ::testing::TestInfo;
-using ::testing::UnitTest;
-
-// The test methods are empty, as the sole purpose of this program is
-// to print the test names before/after shuffling.
-
-class A : public Test {};
-TEST_F(A, A) {}
-TEST_F(A, B) {}
-
-TEST(ADeathTest, A) {}
-TEST(ADeathTest, B) {}
-TEST(ADeathTest, C) {}
-
-TEST(B, A) {}
-TEST(B, B) {}
-TEST(B, C) {}
-TEST(B, DISABLED_D) {}
-TEST(B, DISABLED_E) {}
-
-TEST(BDeathTest, A) {}
-TEST(BDeathTest, B) {}
-
-TEST(C, A) {}
-TEST(C, B) {}
-TEST(C, C) {}
-TEST(C, DISABLED_D) {}
-
-TEST(CDeathTest, A) {}
-
-TEST(DISABLED_D, A) {}
-TEST(DISABLED_D, DISABLED_B) {}
-
-// This printer prints the full test names only, starting each test
-// iteration with a "----" marker.
-class TestNamePrinter : public EmptyTestEventListener {
- public:
-  void OnTestIterationStart(const UnitTest& /* unit_test */,
-                            int /* iteration */) override {
-    printf("----\n");
-  }
-
-  void OnTestStart(const TestInfo& test_info) override {
-    printf("%s.%s\n", test_info.test_case_name(), test_info.name());
-  }
-};
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-
-  // Replaces the default printer with TestNamePrinter, which prints
-  // the test name only.
-  TestEventListeners& listeners = UnitTest::GetInstance()->listeners();
-  delete listeners.Release(listeners.default_result_printer());
-  listeners.Append(new TestNamePrinter);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-test-part-test.cc b/3rdparty/gtest/test/googletest-test-part-test.cc
deleted file mode 100644
index 44cf7ca0..00000000
--- a/3rdparty/gtest/test/googletest-test-part-test.cc
+++ /dev/null
@@ -1,230 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include "gtest/gtest-test-part.h"
-
-#include "gtest/gtest.h"
-
-using testing::Message;
-using testing::Test;
-using testing::TestPartResult;
-using testing::TestPartResultArray;
-
-namespace {
-
-// Tests the TestPartResult class.
-
-// The test fixture for testing TestPartResult.
-class TestPartResultTest : public Test {
- protected:
-  TestPartResultTest()
-      : r1_(TestPartResult::kSuccess, "foo/bar.cc", 10, "Success!"),
-        r2_(TestPartResult::kNonFatalFailure, "foo/bar.cc", -1, "Failure!"),
-        r3_(TestPartResult::kFatalFailure, nullptr, -1, "Failure!"),
-        r4_(TestPartResult::kSkip, "foo/bar.cc", 2, "Skipped!") {}
-
-  TestPartResult r1_, r2_, r3_, r4_;
-};
-
-
-TEST_F(TestPartResultTest, ConstructorWorks) {
-  Message message;
-  message << "something is terribly wrong";
-  message << static_cast<const char*>(testing::internal::kStackTraceMarker);
-  message << "some unimportant stack trace";
-
-  const TestPartResult result(TestPartResult::kNonFatalFailure,
-                              "some_file.cc",
-                              42,
-                              message.GetString().c_str());
-
-  EXPECT_EQ(TestPartResult::kNonFatalFailure, result.type());
-  EXPECT_STREQ("some_file.cc", result.file_name());
-  EXPECT_EQ(42, result.line_number());
-  EXPECT_STREQ(message.GetString().c_str(), result.message());
-  EXPECT_STREQ("something is terribly wrong", result.summary());
-}
-
-TEST_F(TestPartResultTest, ResultAccessorsWork) {
-  const TestPartResult success(TestPartResult::kSuccess,
-                               "file.cc",
-                               42,
-                               "message");
-  EXPECT_TRUE(success.passed());
-  EXPECT_FALSE(success.failed());
-  EXPECT_FALSE(success.nonfatally_failed());
-  EXPECT_FALSE(success.fatally_failed());
-  EXPECT_FALSE(success.skipped());
-
-  const TestPartResult nonfatal_failure(TestPartResult::kNonFatalFailure,
-                                        "file.cc",
-                                        42,
-                                        "message");
-  EXPECT_FALSE(nonfatal_failure.passed());
-  EXPECT_TRUE(nonfatal_failure.failed());
-  EXPECT_TRUE(nonfatal_failure.nonfatally_failed());
-  EXPECT_FALSE(nonfatal_failure.fatally_failed());
-  EXPECT_FALSE(nonfatal_failure.skipped());
-
-  const TestPartResult fatal_failure(TestPartResult::kFatalFailure,
-                                     "file.cc",
-                                     42,
-                                     "message");
-  EXPECT_FALSE(fatal_failure.passed());
-  EXPECT_TRUE(fatal_failure.failed());
-  EXPECT_FALSE(fatal_failure.nonfatally_failed());
-  EXPECT_TRUE(fatal_failure.fatally_failed());
-  EXPECT_FALSE(fatal_failure.skipped());
-
-  const TestPartResult skip(TestPartResult::kSkip, "file.cc", 42, "message");
-  EXPECT_FALSE(skip.passed());
-  EXPECT_FALSE(skip.failed());
-  EXPECT_FALSE(skip.nonfatally_failed());
-  EXPECT_FALSE(skip.fatally_failed());
-  EXPECT_TRUE(skip.skipped());
-}
-
-// Tests TestPartResult::type().
-TEST_F(TestPartResultTest, type) {
-  EXPECT_EQ(TestPartResult::kSuccess, r1_.type());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure, r2_.type());
-  EXPECT_EQ(TestPartResult::kFatalFailure, r3_.type());
-  EXPECT_EQ(TestPartResult::kSkip, r4_.type());
-}
-
-// Tests TestPartResult::file_name().
-TEST_F(TestPartResultTest, file_name) {
-  EXPECT_STREQ("foo/bar.cc", r1_.file_name());
-  EXPECT_STREQ(nullptr, r3_.file_name());
-  EXPECT_STREQ("foo/bar.cc", r4_.file_name());
-}
-
-// Tests TestPartResult::line_number().
-TEST_F(TestPartResultTest, line_number) {
-  EXPECT_EQ(10, r1_.line_number());
-  EXPECT_EQ(-1, r2_.line_number());
-  EXPECT_EQ(2, r4_.line_number());
-}
-
-// Tests TestPartResult::message().
-TEST_F(TestPartResultTest, message) {
-  EXPECT_STREQ("Success!", r1_.message());
-  EXPECT_STREQ("Skipped!", r4_.message());
-}
-
-// Tests TestPartResult::passed().
-TEST_F(TestPartResultTest, Passed) {
-  EXPECT_TRUE(r1_.passed());
-  EXPECT_FALSE(r2_.passed());
-  EXPECT_FALSE(r3_.passed());
-  EXPECT_FALSE(r4_.passed());
-}
-
-// Tests TestPartResult::failed().
-TEST_F(TestPartResultTest, Failed) {
-  EXPECT_FALSE(r1_.failed());
-  EXPECT_TRUE(r2_.failed());
-  EXPECT_TRUE(r3_.failed());
-  EXPECT_FALSE(r4_.failed());
-}
-
-// Tests TestPartResult::failed().
-TEST_F(TestPartResultTest, Skipped) {
-  EXPECT_FALSE(r1_.skipped());
-  EXPECT_FALSE(r2_.skipped());
-  EXPECT_FALSE(r3_.skipped());
-  EXPECT_TRUE(r4_.skipped());
-}
-
-// Tests TestPartResult::fatally_failed().
-TEST_F(TestPartResultTest, FatallyFailed) {
-  EXPECT_FALSE(r1_.fatally_failed());
-  EXPECT_FALSE(r2_.fatally_failed());
-  EXPECT_TRUE(r3_.fatally_failed());
-  EXPECT_FALSE(r4_.fatally_failed());
-}
-
-// Tests TestPartResult::nonfatally_failed().
-TEST_F(TestPartResultTest, NonfatallyFailed) {
-  EXPECT_FALSE(r1_.nonfatally_failed());
-  EXPECT_TRUE(r2_.nonfatally_failed());
-  EXPECT_FALSE(r3_.nonfatally_failed());
-  EXPECT_FALSE(r4_.nonfatally_failed());
-}
-
-// Tests the TestPartResultArray class.
-
-class TestPartResultArrayTest : public Test {
- protected:
-  TestPartResultArrayTest()
-      : r1_(TestPartResult::kNonFatalFailure, "foo/bar.cc", -1, "Failure 1"),
-        r2_(TestPartResult::kFatalFailure, "foo/bar.cc", -1, "Failure 2") {}
-
-  const TestPartResult r1_, r2_;
-};
-
-// Tests that TestPartResultArray initially has size 0.
-TEST_F(TestPartResultArrayTest, InitialSizeIsZero) {
-  TestPartResultArray results;
-  EXPECT_EQ(0, results.size());
-}
-
-// Tests that TestPartResultArray contains the given TestPartResult
-// after one Append() operation.
-TEST_F(TestPartResultArrayTest, ContainsGivenResultAfterAppend) {
-  TestPartResultArray results;
-  results.Append(r1_);
-  EXPECT_EQ(1, results.size());
-  EXPECT_STREQ("Failure 1", results.GetTestPartResult(0).message());
-}
-
-// Tests that TestPartResultArray contains the given TestPartResults
-// after two Append() operations.
-TEST_F(TestPartResultArrayTest, ContainsGivenResultsAfterTwoAppends) {
-  TestPartResultArray results;
-  results.Append(r1_);
-  results.Append(r2_);
-  EXPECT_EQ(2, results.size());
-  EXPECT_STREQ("Failure 1", results.GetTestPartResult(0).message());
-  EXPECT_STREQ("Failure 2", results.GetTestPartResult(1).message());
-}
-
-typedef TestPartResultArrayTest TestPartResultArrayDeathTest;
-
-// Tests that the program dies when GetTestPartResult() is called with
-// an invalid index.
-TEST_F(TestPartResultArrayDeathTest, DiesWhenIndexIsOutOfBound) {
-  TestPartResultArray results;
-  results.Append(r1_);
-
-  EXPECT_DEATH_IF_SUPPORTED(results.GetTestPartResult(-1), "");
-  EXPECT_DEATH_IF_SUPPORTED(results.GetTestPartResult(1), "");
-}
-
-}  // namespace
diff --git a/3rdparty/gtest/test/googletest-test2_test.cc b/3rdparty/gtest/test/googletest-test2_test.cc
deleted file mode 100644
index 2e425dae..00000000
--- a/3rdparty/gtest/test/googletest-test2_test.cc
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself.  This verifies that the basic constructs of
-// Google Test work.
-
-#include "gtest/gtest.h"
-#include "googletest-param-test-test.h"
-
-using ::testing::Values;
-using ::testing::internal::ParamGenerator;
-
-// Tests that generators defined in a different translation unit
-// are functional. The test using extern_gen_2 is defined
-// in googletest-param-test-test.cc.
-ParamGenerator<int> extern_gen_2 = Values(33);
-
-// Tests that a parameterized test case can be defined in one translation unit
-// and instantiated in another. The test is defined in
-// googletest-param-test-test.cc and ExternalInstantiationTest fixture class is
-// defined in gtest-param-test_test.h.
-INSTANTIATE_TEST_SUITE_P(MultiplesOf33,
-                         ExternalInstantiationTest,
-                         Values(33, 66));
-
-// Tests that a parameterized test case can be instantiated
-// in multiple translation units. Another instantiation is defined
-// in googletest-param-test-test.cc and
-// InstantiationInMultipleTranslationUnitsTest fixture is defined in
-// gtest-param-test_test.h
-INSTANTIATE_TEST_SUITE_P(Sequence2,
-                         InstantiationInMultipleTranslationUnitsTest,
-                         Values(42*3, 42*4, 42*5));
-
diff --git a/3rdparty/gtest/test/googletest-throw-on-failure-test.py b/3rdparty/gtest/test/googletest-throw-on-failure-test.py
deleted file mode 100644
index ea627c47..00000000
--- a/3rdparty/gtest/test/googletest-throw-on-failure-test.py
+++ /dev/null
@@ -1,168 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Tests Google Test's throw-on-failure mode with exceptions disabled.
-
-This script invokes googletest-throw-on-failure-test_ (a program written with
-Google Test) with different environments and command line flags.
-"""
-
-import os
-import gtest_test_utils
-
-
-# Constants.
-
-# The command line flag for enabling/disabling the throw-on-failure mode.
-THROW_ON_FAILURE = 'gtest_throw_on_failure'
-
-# Path to the googletest-throw-on-failure-test_ program, compiled with
-# exceptions disabled.
-EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'googletest-throw-on-failure-test_')
-
-
-# Utilities.
-
-
-def SetEnvVar(env_var, value):
-  """Sets an environment variable to a given value; unsets it when the
-  given value is None.
-  """
-
-  env_var = env_var.upper()
-  if value is not None:
-    os.environ[env_var] = value
-  elif env_var in os.environ:
-    del os.environ[env_var]
-
-
-def Run(command):
-  """Runs a command; returns True/False if its exit code is/isn't 0."""
-
-  print('Running "%s". . .' % ' '.join(command))
-  p = gtest_test_utils.Subprocess(command)
-  return p.exited and p.exit_code == 0
-
-
-# The tests.
-class ThrowOnFailureTest(gtest_test_utils.TestCase):
-  """Tests the throw-on-failure mode."""
-
-  def RunAndVerify(self, env_var_value, flag_value, should_fail):
-    """Runs googletest-throw-on-failure-test_ and verifies that it does
-    (or does not) exit with a non-zero code.
-
-    Args:
-      env_var_value:    value of the GTEST_BREAK_ON_FAILURE environment
-                        variable; None if the variable should be unset.
-      flag_value:       value of the --gtest_break_on_failure flag;
-                        None if the flag should not be present.
-      should_fail:      True if and only if the program is expected to fail.
-    """
-
-    SetEnvVar(THROW_ON_FAILURE, env_var_value)
-
-    if env_var_value is None:
-      env_var_value_msg = ' is not set'
-    else:
-      env_var_value_msg = '=' + env_var_value
-
-    if flag_value is None:
-      flag = ''
-    elif flag_value == '0':
-      flag = '--%s=0' % THROW_ON_FAILURE
-    else:
-      flag = '--%s' % THROW_ON_FAILURE
-
-    command = [EXE_PATH]
-    if flag:
-      command.append(flag)
-
-    if should_fail:
-      should_or_not = 'should'
-    else:
-      should_or_not = 'should not'
-
-    failed = not Run(command)
-
-    SetEnvVar(THROW_ON_FAILURE, None)
-
-    msg = ('when %s%s, an assertion failure in "%s" %s cause a non-zero '
-           'exit code.' %
-           (THROW_ON_FAILURE, env_var_value_msg, ' '.join(command),
-            should_or_not))
-    self.assert_(failed == should_fail, msg)
-
-  def testDefaultBehavior(self):
-    """Tests the behavior of the default mode."""
-
-    self.RunAndVerify(env_var_value=None, flag_value=None, should_fail=False)
-
-  def testThrowOnFailureEnvVar(self):
-    """Tests using the GTEST_THROW_ON_FAILURE environment variable."""
-
-    self.RunAndVerify(env_var_value='0',
-                      flag_value=None,
-                      should_fail=False)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value=None,
-                      should_fail=True)
-
-  def testThrowOnFailureFlag(self):
-    """Tests using the --gtest_throw_on_failure flag."""
-
-    self.RunAndVerify(env_var_value=None,
-                      flag_value='0',
-                      should_fail=False)
-    self.RunAndVerify(env_var_value=None,
-                      flag_value='1',
-                      should_fail=True)
-
-  def testThrowOnFailureFlagOverridesEnvVar(self):
-    """Tests that --gtest_throw_on_failure overrides GTEST_THROW_ON_FAILURE."""
-
-    self.RunAndVerify(env_var_value='0',
-                      flag_value='0',
-                      should_fail=False)
-    self.RunAndVerify(env_var_value='0',
-                      flag_value='1',
-                      should_fail=True)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value='0',
-                      should_fail=False)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value='1',
-                      should_fail=True)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-throw-on-failure-test_.cc b/3rdparty/gtest/test/googletest-throw-on-failure-test_.cc
deleted file mode 100644
index 83bb914c..00000000
--- a/3rdparty/gtest/test/googletest-throw-on-failure-test_.cc
+++ /dev/null
@@ -1,71 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests Google Test's throw-on-failure mode with exceptions disabled.
-//
-// This program must be compiled with exceptions disabled.  It will be
-// invoked by googletest-throw-on-failure-test.py, and is expected to exit
-// with non-zero in the throw-on-failure mode or 0 otherwise.
-
-#include "gtest/gtest.h"
-
-#include <stdio.h>                      // for fflush, fprintf, NULL, etc.
-#include <stdlib.h>                     // for exit
-#include <exception>                    // for set_terminate
-
-// This terminate handler aborts the program using exit() rather than abort().
-// This avoids showing pop-ups on Windows systems and core dumps on Unix-like
-// ones.
-void TerminateHandler() {
-  fprintf(stderr, "%s\n", "Unhandled C++ exception terminating the program.");
-  fflush(nullptr);
-  exit(1);
-}
-
-int main(int argc, char** argv) {
-#if GTEST_HAS_EXCEPTIONS
-  std::set_terminate(&TerminateHandler);
-#endif
-  testing::InitGoogleTest(&argc, argv);
-
-  // We want to ensure that people can use Google Test assertions in
-  // other testing frameworks, as long as they initialize Google Test
-  // properly and set the throw-on-failure mode.  Therefore, we don't
-  // use Google Test's constructs for defining and running tests
-  // (e.g. TEST and RUN_ALL_TESTS) here.
-
-  // In the throw-on-failure mode with exceptions disabled, this
-  // assertion will cause the program to exit with a non-zero code.
-  EXPECT_EQ(2, 3);
-
-  // When not in the throw-on-failure mode, the control will reach
-  // here.
-  return 0;
-}
diff --git a/3rdparty/gtest/test/googletest-uninitialized-test.py b/3rdparty/gtest/test/googletest-uninitialized-test.py
deleted file mode 100644
index 69595a0d..00000000
--- a/3rdparty/gtest/test/googletest-uninitialized-test.py
+++ /dev/null
@@ -1,67 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test warns the user when not initialized properly."""
-
-import gtest_test_utils
-
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-uninitialized-test_')
-
-
-def Assert(condition):
-  if not condition:
-    raise AssertionError
-
-
-def AssertEq(expected, actual):
-  if expected != actual:
-    print('Expected: %s' % (expected,))
-    print('  Actual: %s' % (actual,))
-    raise AssertionError
-
-
-def TestExitCodeAndOutput(command):
-  """Runs the given command and verifies its exit code and output."""
-
-  # Verifies that 'command' exits with code 1.
-  p = gtest_test_utils.Subprocess(command)
-  if p.exited and p.exit_code == 0:
-    Assert('IMPORTANT NOTICE' in p.output);
-  Assert('InitGoogleTest' in p.output)
-
-
-class GTestUninitializedTest(gtest_test_utils.TestCase):
-  def testExitCodeAndOutput(self):
-    TestExitCodeAndOutput(COMMAND)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-uninitialized-test_.cc b/3rdparty/gtest/test/googletest-uninitialized-test_.cc
deleted file mode 100644
index b4434d51..00000000
--- a/3rdparty/gtest/test/googletest-uninitialized-test_.cc
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest.h"
-
-TEST(DummyTest, Dummy) {
-  // This test doesn't verify anything.  We just need it to create a
-  // realistic stage for testing the behavior of Google Test when
-  // RUN_ALL_TESTS() is called without
-  // testing::InitGoogleTest() being called first.
-}
-
-int main() {
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/gtest-typed-test2_test.cc b/3rdparty/gtest/test/gtest-typed-test2_test.cc
deleted file mode 100644
index 70001604..00000000
--- a/3rdparty/gtest/test/gtest-typed-test2_test.cc
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include <vector>
-
-#include "test/gtest-typed-test_test.h"
-#include "gtest/gtest.h"
-
-#if GTEST_HAS_TYPED_TEST_P
-
-// Tests that the same type-parameterized test case can be
-// instantiated in different translation units linked together.
-// (ContainerTest is also instantiated in gtest-typed-test_test.cc.)
-INSTANTIATE_TYPED_TEST_SUITE_P(Vector, ContainerTest,
-                               testing::Types<std::vector<int> >);
-
-#endif  // GTEST_HAS_TYPED_TEST_P
diff --git a/3rdparty/gtest/test/gtest-typed-test_test.cc b/3rdparty/gtest/test/gtest-typed-test_test.cc
deleted file mode 100644
index 5411832a..00000000
--- a/3rdparty/gtest/test/gtest-typed-test_test.cc
+++ /dev/null
@@ -1,462 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "test/gtest-typed-test_test.h"
-
-#include <set>
-#include <type_traits>
-#include <vector>
-
-#include "gtest/gtest.h"
-
-#if _MSC_VER
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4127 /* conditional expression is constant */)
-#endif  //  _MSC_VER
-
-using testing::Test;
-
-// Used for testing that SetUpTestSuite()/TearDownTestSuite(), fixture
-// ctor/dtor, and SetUp()/TearDown() work correctly in typed tests and
-// type-parameterized test.
-template <typename T>
-class CommonTest : public Test {
-  // For some technical reason, SetUpTestSuite() and TearDownTestSuite()
-  // must be public.
- public:
-  static void SetUpTestSuite() {
-    shared_ = new T(5);
-  }
-
-  static void TearDownTestSuite() {
-    delete shared_;
-    shared_ = nullptr;
-  }
-
-  // This 'protected:' is optional.  There's no harm in making all
-  // members of this fixture class template public.
- protected:
-  // We used to use std::list here, but switched to std::vector since
-  // MSVC's <list> doesn't compile cleanly with /W4.
-  typedef std::vector<T> Vector;
-  typedef std::set<int> IntSet;
-
-  CommonTest() : value_(1) {}
-
-  ~CommonTest() override { EXPECT_EQ(3, value_); }
-
-  void SetUp() override {
-    EXPECT_EQ(1, value_);
-    value_++;
-  }
-
-  void TearDown() override {
-    EXPECT_EQ(2, value_);
-    value_++;
-  }
-
-  T value_;
-  static T* shared_;
-};
-
-template <typename T>
-T* CommonTest<T>::shared_ = nullptr;
-
-// This #ifdef block tests typed tests.
-#if GTEST_HAS_TYPED_TEST
-
-using testing::Types;
-
-// Tests that SetUpTestSuite()/TearDownTestSuite(), fixture ctor/dtor,
-// and SetUp()/TearDown() work correctly in typed tests
-
-typedef Types<char, int> TwoTypes;
-TYPED_TEST_SUITE(CommonTest, TwoTypes);
-
-TYPED_TEST(CommonTest, ValuesAreCorrect) {
-  // Static members of the fixture class template can be visited via
-  // the TestFixture:: prefix.
-  EXPECT_EQ(5, *TestFixture::shared_);
-
-  // Typedefs in the fixture class template can be visited via the
-  // "typename TestFixture::" prefix.
-  typename TestFixture::Vector empty;
-  EXPECT_EQ(0U, empty.size());
-
-  typename TestFixture::IntSet empty2;
-  EXPECT_EQ(0U, empty2.size());
-
-  // Non-static members of the fixture class must be visited via
-  // 'this', as required by C++ for class templates.
-  EXPECT_EQ(2, this->value_);
-}
-
-// The second test makes sure shared_ is not deleted after the first
-// test.
-TYPED_TEST(CommonTest, ValuesAreStillCorrect) {
-  // Static members of the fixture class template can also be visited
-  // via 'this'.
-  ASSERT_TRUE(this->shared_ != nullptr);
-  EXPECT_EQ(5, *this->shared_);
-
-  // TypeParam can be used to refer to the type parameter.
-  EXPECT_EQ(static_cast<TypeParam>(2), this->value_);
-}
-
-// Tests that multiple TYPED_TEST_SUITE's can be defined in the same
-// translation unit.
-
-template <typename T>
-class TypedTest1 : public Test {
-};
-
-// Verifies that the second argument of TYPED_TEST_SUITE can be a
-// single type.
-TYPED_TEST_SUITE(TypedTest1, int);
-TYPED_TEST(TypedTest1, A) {}
-
-template <typename T>
-class TypedTest2 : public Test {
-};
-
-// Verifies that the second argument of TYPED_TEST_SUITE can be a
-// Types<...> type list.
-TYPED_TEST_SUITE(TypedTest2, Types<int>);
-
-// This also verifies that tests from different typed test cases can
-// share the same name.
-TYPED_TEST(TypedTest2, A) {}
-
-// Tests that a typed test case can be defined in a namespace.
-
-namespace library1 {
-
-template <typename T>
-class NumericTest : public Test {
-};
-
-typedef Types<int, long> NumericTypes;
-TYPED_TEST_SUITE(NumericTest, NumericTypes);
-
-TYPED_TEST(NumericTest, DefaultIsZero) {
-  EXPECT_EQ(0, TypeParam());
-}
-
-}  // namespace library1
-
-// Tests that custom names work.
-template <typename T>
-class TypedTestWithNames : public Test {};
-
-class TypedTestNames {
- public:
-  template <typename T>
-  static std::string GetName(int i) {
-    if (std::is_same<T, char>::value) {
-      return std::string("char") + ::testing::PrintToString(i);
-    }
-    if (std::is_same<T, int>::value) {
-      return std::string("int") + ::testing::PrintToString(i);
-    }
-  }
-};
-
-TYPED_TEST_SUITE(TypedTestWithNames, TwoTypes, TypedTestNames);
-
-TYPED_TEST(TypedTestWithNames, TestSuiteName) {
-  if (std::is_same<TypeParam, char>::value) {
-    EXPECT_STREQ(::testing::UnitTest::GetInstance()
-                     ->current_test_info()
-                     ->test_case_name(),
-                 "TypedTestWithNames/char0");
-  }
-  if (std::is_same<TypeParam, int>::value) {
-    EXPECT_STREQ(::testing::UnitTest::GetInstance()
-                     ->current_test_info()
-                     ->test_case_name(),
-                 "TypedTestWithNames/int1");
-  }
-}
-
-#endif  // GTEST_HAS_TYPED_TEST
-
-// This #ifdef block tests type-parameterized tests.
-#if GTEST_HAS_TYPED_TEST_P
-
-using testing::Types;
-using testing::internal::TypedTestSuitePState;
-
-// Tests TypedTestSuitePState.
-
-class TypedTestSuitePStateTest : public Test {
- protected:
-  void SetUp() override {
-    state_.AddTestName("foo.cc", 0, "FooTest", "A");
-    state_.AddTestName("foo.cc", 0, "FooTest", "B");
-    state_.AddTestName("foo.cc", 0, "FooTest", "C");
-  }
-
-  TypedTestSuitePState state_;
-};
-
-TEST_F(TypedTestSuitePStateTest, SucceedsForMatchingList) {
-  const char* tests = "A, B, C";
-  EXPECT_EQ(tests,
-            state_.VerifyRegisteredTestNames("foo.cc", 1, tests));
-}
-
-// Makes sure that the order of the tests and spaces around the names
-// don't matter.
-TEST_F(TypedTestSuitePStateTest, IgnoresOrderAndSpaces) {
-  const char* tests = "A,C,   B";
-  EXPECT_EQ(tests,
-            state_.VerifyRegisteredTestNames("foo.cc", 1, tests));
-}
-
-using TypedTestSuitePStateDeathTest = TypedTestSuitePStateTest;
-
-TEST_F(TypedTestSuitePStateDeathTest, DetectsDuplicates) {
-  EXPECT_DEATH_IF_SUPPORTED(
-      state_.VerifyRegisteredTestNames("foo.cc", 1, "A, B, A, C"),
-      "foo\\.cc.1.?: Test A is listed more than once\\.");
-}
-
-TEST_F(TypedTestSuitePStateDeathTest, DetectsExtraTest) {
-  EXPECT_DEATH_IF_SUPPORTED(
-      state_.VerifyRegisteredTestNames("foo.cc", 1, "A, B, C, D"),
-      "foo\\.cc.1.?: No test named D can be found in this test suite\\.");
-}
-
-TEST_F(TypedTestSuitePStateDeathTest, DetectsMissedTest) {
-  EXPECT_DEATH_IF_SUPPORTED(
-      state_.VerifyRegisteredTestNames("foo.cc", 1, "A, C"),
-      "foo\\.cc.1.?: You forgot to list test B\\.");
-}
-
-// Tests that defining a test for a parameterized test case generates
-// a run-time error if the test case has been registered.
-TEST_F(TypedTestSuitePStateDeathTest, DetectsTestAfterRegistration) {
-  state_.VerifyRegisteredTestNames("foo.cc", 1, "A, B, C");
-  EXPECT_DEATH_IF_SUPPORTED(
-      state_.AddTestName("foo.cc", 2, "FooTest", "D"),
-      "foo\\.cc.2.?: Test D must be defined before REGISTER_TYPED_TEST_SUITE_P"
-      "\\(FooTest, \\.\\.\\.\\)\\.");
-}
-
-// Tests that SetUpTestSuite()/TearDownTestSuite(), fixture ctor/dtor,
-// and SetUp()/TearDown() work correctly in type-parameterized tests.
-
-template <typename T>
-class DerivedTest : public CommonTest<T> {
-};
-
-TYPED_TEST_SUITE_P(DerivedTest);
-
-TYPED_TEST_P(DerivedTest, ValuesAreCorrect) {
-  // Static members of the fixture class template can be visited via
-  // the TestFixture:: prefix.
-  EXPECT_EQ(5, *TestFixture::shared_);
-
-  // Non-static members of the fixture class must be visited via
-  // 'this', as required by C++ for class templates.
-  EXPECT_EQ(2, this->value_);
-}
-
-// The second test makes sure shared_ is not deleted after the first
-// test.
-TYPED_TEST_P(DerivedTest, ValuesAreStillCorrect) {
-  // Static members of the fixture class template can also be visited
-  // via 'this'.
-  ASSERT_TRUE(this->shared_ != nullptr);
-  EXPECT_EQ(5, *this->shared_);
-  EXPECT_EQ(2, this->value_);
-}
-
-REGISTER_TYPED_TEST_SUITE_P(DerivedTest,
-                           ValuesAreCorrect, ValuesAreStillCorrect);
-
-typedef Types<short, long> MyTwoTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, DerivedTest, MyTwoTypes);
-
-// Tests that custom names work with type parametrized tests. We reuse the
-// TwoTypes from above here.
-template <typename T>
-class TypeParametrizedTestWithNames : public Test {};
-
-TYPED_TEST_SUITE_P(TypeParametrizedTestWithNames);
-
-TYPED_TEST_P(TypeParametrizedTestWithNames, TestSuiteName) {
-  if (std::is_same<TypeParam, char>::value) {
-    EXPECT_STREQ(::testing::UnitTest::GetInstance()
-                     ->current_test_info()
-                     ->test_case_name(),
-                 "CustomName/TypeParametrizedTestWithNames/parChar0");
-  }
-  if (std::is_same<TypeParam, int>::value) {
-    EXPECT_STREQ(::testing::UnitTest::GetInstance()
-                     ->current_test_info()
-                     ->test_case_name(),
-                 "CustomName/TypeParametrizedTestWithNames/parInt1");
-  }
-}
-
-REGISTER_TYPED_TEST_SUITE_P(TypeParametrizedTestWithNames, TestSuiteName);
-
-class TypeParametrizedTestNames {
- public:
-  template <typename T>
-  static std::string GetName(int i) {
-    if (std::is_same<T, char>::value) {
-      return std::string("parChar") + ::testing::PrintToString(i);
-    }
-    if (std::is_same<T, int>::value) {
-      return std::string("parInt") + ::testing::PrintToString(i);
-    }
-  }
-};
-
-INSTANTIATE_TYPED_TEST_SUITE_P(CustomName, TypeParametrizedTestWithNames,
-                              TwoTypes, TypeParametrizedTestNames);
-
-// Tests that multiple TYPED_TEST_SUITE_P's can be defined in the same
-// translation unit.
-
-template <typename T>
-class TypedTestP1 : public Test {
-};
-
-TYPED_TEST_SUITE_P(TypedTestP1);
-
-// For testing that the code between TYPED_TEST_SUITE_P() and
-// TYPED_TEST_P() is not enclosed in a namespace.
-using IntAfterTypedTestSuiteP = int;
-
-TYPED_TEST_P(TypedTestP1, A) {}
-TYPED_TEST_P(TypedTestP1, B) {}
-
-// For testing that the code between TYPED_TEST_P() and
-// REGISTER_TYPED_TEST_SUITE_P() is not enclosed in a namespace.
-using IntBeforeRegisterTypedTestSuiteP = int;
-
-REGISTER_TYPED_TEST_SUITE_P(TypedTestP1, A, B);
-
-template <typename T>
-class TypedTestP2 : public Test {
-};
-
-TYPED_TEST_SUITE_P(TypedTestP2);
-
-// This also verifies that tests from different type-parameterized
-// test cases can share the same name.
-TYPED_TEST_P(TypedTestP2, A) {}
-
-REGISTER_TYPED_TEST_SUITE_P(TypedTestP2, A);
-
-// Verifies that the code between TYPED_TEST_SUITE_P() and
-// REGISTER_TYPED_TEST_SUITE_P() is not enclosed in a namespace.
-IntAfterTypedTestSuiteP after = 0;
-IntBeforeRegisterTypedTestSuiteP before = 0;
-
-// Verifies that the last argument of INSTANTIATE_TYPED_TEST_SUITE_P()
-// can be either a single type or a Types<...> type list.
-INSTANTIATE_TYPED_TEST_SUITE_P(Int, TypedTestP1, int);
-INSTANTIATE_TYPED_TEST_SUITE_P(Int, TypedTestP2, Types<int>);
-
-// Tests that the same type-parameterized test case can be
-// instantiated more than once in the same translation unit.
-INSTANTIATE_TYPED_TEST_SUITE_P(Double, TypedTestP2, Types<double>);
-
-// Tests that the same type-parameterized test case can be
-// instantiated in different translation units linked together.
-// (ContainerTest is also instantiated in gtest-typed-test_test.cc.)
-typedef Types<std::vector<double>, std::set<char> > MyContainers;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, ContainerTest, MyContainers);
-
-// Tests that a type-parameterized test case can be defined and
-// instantiated in a namespace.
-
-namespace library2 {
-
-template <typename T>
-class NumericTest : public Test {
-};
-
-TYPED_TEST_SUITE_P(NumericTest);
-
-TYPED_TEST_P(NumericTest, DefaultIsZero) {
-  EXPECT_EQ(0, TypeParam());
-}
-
-TYPED_TEST_P(NumericTest, ZeroIsLessThanOne) {
-  EXPECT_LT(TypeParam(0), TypeParam(1));
-}
-
-REGISTER_TYPED_TEST_SUITE_P(NumericTest,
-                           DefaultIsZero, ZeroIsLessThanOne);
-typedef Types<int, double> NumericTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, NumericTest, NumericTypes);
-
-static const char* GetTestName() {
-  return testing::UnitTest::GetInstance()->current_test_info()->name();
-}
-// Test the stripping of space from test names
-template <typename T> class TrimmedTest : public Test { };
-TYPED_TEST_SUITE_P(TrimmedTest);
-TYPED_TEST_P(TrimmedTest, Test1) { EXPECT_STREQ("Test1", GetTestName()); }
-TYPED_TEST_P(TrimmedTest, Test2) { EXPECT_STREQ("Test2", GetTestName()); }
-TYPED_TEST_P(TrimmedTest, Test3) { EXPECT_STREQ("Test3", GetTestName()); }
-TYPED_TEST_P(TrimmedTest, Test4) { EXPECT_STREQ("Test4", GetTestName()); }
-TYPED_TEST_P(TrimmedTest, Test5) { EXPECT_STREQ("Test5", GetTestName()); }
-REGISTER_TYPED_TEST_SUITE_P(
-    TrimmedTest,
-    Test1, Test2,Test3 , Test4 ,Test5 );  // NOLINT
-template <typename T1, typename T2> struct MyPair {};
-// Be sure to try a type with a comma in its name just in case it matters.
-typedef Types<int, double, MyPair<int, int> > TrimTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, TrimmedTest, TrimTypes);
-
-}  // namespace library2
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-
-#if !defined(GTEST_HAS_TYPED_TEST) && !defined(GTEST_HAS_TYPED_TEST_P)
-
-// Google Test may not support type-parameterized tests with some
-// compilers. If we use conditional compilation to compile out all
-// code referring to the gtest_main library, MSVC linker will not link
-// that library at all and consequently complain about missing entry
-// point defined in that library (fatal error LNK1561: entry point
-// must be defined). This dummy test keeps gtest_main linked in.
-TEST(DummyTest, TypedTestsAreNotSupportedOnThisPlatform) {}
-
-#if _MSC_VER
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4127
-#endif                             //  _MSC_VER
-
-#endif  // #if !defined(GTEST_HAS_TYPED_TEST) && !defined(GTEST_HAS_TYPED_TEST_P)
diff --git a/3rdparty/gtest/test/gtest-typed-test_test.h b/3rdparty/gtest/test/gtest-typed-test_test.h
deleted file mode 100644
index 23137b7e..00000000
--- a/3rdparty/gtest/test/gtest-typed-test_test.h
+++ /dev/null
@@ -1,65 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#ifndef GTEST_TEST_GTEST_TYPED_TEST_TEST_H_
-#define GTEST_TEST_GTEST_TYPED_TEST_TEST_H_
-
-#include "gtest/gtest.h"
-
-#if GTEST_HAS_TYPED_TEST_P
-
-using testing::Test;
-
-// For testing that the same type-parameterized test case can be
-// instantiated in different translation units linked together.
-// ContainerTest will be instantiated in both gtest-typed-test_test.cc
-// and gtest-typed-test2_test.cc.
-
-template <typename T>
-class ContainerTest : public Test {
-};
-
-TYPED_TEST_SUITE_P(ContainerTest);
-
-TYPED_TEST_P(ContainerTest, CanBeDefaultConstructed) {
-  TypeParam container;
-}
-
-TYPED_TEST_P(ContainerTest, InitialSizeIsZero) {
-  TypeParam container;
-  EXPECT_EQ(0U, container.size());
-}
-
-REGISTER_TYPED_TEST_SUITE_P(ContainerTest,
-                            CanBeDefaultConstructed, InitialSizeIsZero);
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-
-#endif  // GTEST_TEST_GTEST_TYPED_TEST_TEST_H_
diff --git a/3rdparty/gtest/test/gtest-unittest-api_test.cc b/3rdparty/gtest/test/gtest-unittest-api_test.cc
deleted file mode 100644
index 480a41fb..00000000
--- a/3rdparty/gtest/test/gtest-unittest-api_test.cc
+++ /dev/null
@@ -1,340 +0,0 @@
-// Copyright 2009 Google Inc.  All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file contains tests verifying correctness of data provided via
-// UnitTest's public methods.
-
-#include "gtest/gtest.h"
-
-#include <string.h>  // For strcmp.
-#include <algorithm>
-
-using ::testing::InitGoogleTest;
-
-namespace testing {
-namespace internal {
-
-template <typename T>
-struct LessByName {
-  bool operator()(const T* a, const T* b) {
-    return strcmp(a->name(), b->name()) < 0;
-  }
-};
-
-class UnitTestHelper {
- public:
-  // Returns the array of pointers to all test suites sorted by the test suite
-  // name.  The caller is responsible for deleting the array.
-  static TestSuite const** GetSortedTestSuites() {
-    UnitTest& unit_test = *UnitTest::GetInstance();
-    auto const** const test_suites =
-        new const TestSuite*[unit_test.total_test_suite_count()];
-
-    for (int i = 0; i < unit_test.total_test_suite_count(); ++i)
-      test_suites[i] = unit_test.GetTestSuite(i);
-
-    std::sort(test_suites,
-              test_suites + unit_test.total_test_suite_count(),
-              LessByName<TestSuite>());
-    return test_suites;
-  }
-
-  // Returns the test suite by its name.  The caller doesn't own the returned
-  // pointer.
-  static const TestSuite* FindTestSuite(const char* name) {
-    UnitTest& unit_test = *UnitTest::GetInstance();
-    for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-      const TestSuite* test_suite = unit_test.GetTestSuite(i);
-      if (0 == strcmp(test_suite->name(), name))
-        return test_suite;
-    }
-    return nullptr;
-  }
-
-  // Returns the array of pointers to all tests in a particular test suite
-  // sorted by the test name.  The caller is responsible for deleting the
-  // array.
-  static TestInfo const** GetSortedTests(const TestSuite* test_suite) {
-    TestInfo const** const tests =
-        new const TestInfo*[test_suite->total_test_count()];
-
-    for (int i = 0; i < test_suite->total_test_count(); ++i)
-      tests[i] = test_suite->GetTestInfo(i);
-
-    std::sort(tests, tests + test_suite->total_test_count(),
-              LessByName<TestInfo>());
-    return tests;
-  }
-};
-
-#if GTEST_HAS_TYPED_TEST
-template <typename T> class TestSuiteWithCommentTest : public Test {};
-TYPED_TEST_SUITE(TestSuiteWithCommentTest, Types<int>);
-TYPED_TEST(TestSuiteWithCommentTest, Dummy) {}
-
-const int kTypedTestSuites = 1;
-const int kTypedTests = 1;
-#else
-const int kTypedTestSuites = 0;
-const int kTypedTests = 0;
-#endif  // GTEST_HAS_TYPED_TEST
-
-// We can only test the accessors that do not change value while tests run.
-// Since tests can be run in any order, the values the accessors that track
-// test execution (such as failed_test_count) can not be predicted.
-TEST(ApiTest, UnitTestImmutableAccessorsWork) {
-  UnitTest* unit_test = UnitTest::GetInstance();
-
-  ASSERT_EQ(2 + kTypedTestSuites, unit_test->total_test_suite_count());
-  EXPECT_EQ(1 + kTypedTestSuites, unit_test->test_suite_to_run_count());
-  EXPECT_EQ(2, unit_test->disabled_test_count());
-  EXPECT_EQ(5 + kTypedTests, unit_test->total_test_count());
-  EXPECT_EQ(3 + kTypedTests, unit_test->test_to_run_count());
-
-  const TestSuite** const test_suites = UnitTestHelper::GetSortedTestSuites();
-
-  EXPECT_STREQ("ApiTest", test_suites[0]->name());
-  EXPECT_STREQ("DISABLED_Test", test_suites[1]->name());
-#if GTEST_HAS_TYPED_TEST
-  EXPECT_STREQ("TestSuiteWithCommentTest/0", test_suites[2]->name());
-#endif  // GTEST_HAS_TYPED_TEST
-
-  delete[] test_suites;
-
-  // The following lines initiate actions to verify certain methods in
-  // FinalSuccessChecker::TearDown.
-
-  // Records a test property to verify TestResult::GetTestProperty().
-  RecordProperty("key", "value");
-}
-
-AssertionResult IsNull(const char* str) {
-  if (str != nullptr) {
-    return testing::AssertionFailure() << "argument is " << str;
-  }
-  return AssertionSuccess();
-}
-
-TEST(ApiTest, TestSuiteImmutableAccessorsWork) {
-  const TestSuite* test_suite = UnitTestHelper::FindTestSuite("ApiTest");
-  ASSERT_TRUE(test_suite != nullptr);
-
-  EXPECT_STREQ("ApiTest", test_suite->name());
-  EXPECT_TRUE(IsNull(test_suite->type_param()));
-  EXPECT_TRUE(test_suite->should_run());
-  EXPECT_EQ(1, test_suite->disabled_test_count());
-  EXPECT_EQ(3, test_suite->test_to_run_count());
-  ASSERT_EQ(4, test_suite->total_test_count());
-
-  const TestInfo** tests = UnitTestHelper::GetSortedTests(test_suite);
-
-  EXPECT_STREQ("DISABLED_Dummy1", tests[0]->name());
-  EXPECT_STREQ("ApiTest", tests[0]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[0]->value_param()));
-  EXPECT_TRUE(IsNull(tests[0]->type_param()));
-  EXPECT_FALSE(tests[0]->should_run());
-
-  EXPECT_STREQ("TestSuiteDisabledAccessorsWork", tests[1]->name());
-  EXPECT_STREQ("ApiTest", tests[1]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[1]->value_param()));
-  EXPECT_TRUE(IsNull(tests[1]->type_param()));
-  EXPECT_TRUE(tests[1]->should_run());
-
-  EXPECT_STREQ("TestSuiteImmutableAccessorsWork", tests[2]->name());
-  EXPECT_STREQ("ApiTest", tests[2]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[2]->value_param()));
-  EXPECT_TRUE(IsNull(tests[2]->type_param()));
-  EXPECT_TRUE(tests[2]->should_run());
-
-  EXPECT_STREQ("UnitTestImmutableAccessorsWork", tests[3]->name());
-  EXPECT_STREQ("ApiTest", tests[3]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[3]->value_param()));
-  EXPECT_TRUE(IsNull(tests[3]->type_param()));
-  EXPECT_TRUE(tests[3]->should_run());
-
-  delete[] tests;
-  tests = nullptr;
-
-#if GTEST_HAS_TYPED_TEST
-  test_suite = UnitTestHelper::FindTestSuite("TestSuiteWithCommentTest/0");
-  ASSERT_TRUE(test_suite != nullptr);
-
-  EXPECT_STREQ("TestSuiteWithCommentTest/0", test_suite->name());
-  EXPECT_STREQ(GetTypeName<int>().c_str(), test_suite->type_param());
-  EXPECT_TRUE(test_suite->should_run());
-  EXPECT_EQ(0, test_suite->disabled_test_count());
-  EXPECT_EQ(1, test_suite->test_to_run_count());
-  ASSERT_EQ(1, test_suite->total_test_count());
-
-  tests = UnitTestHelper::GetSortedTests(test_suite);
-
-  EXPECT_STREQ("Dummy", tests[0]->name());
-  EXPECT_STREQ("TestSuiteWithCommentTest/0", tests[0]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[0]->value_param()));
-  EXPECT_STREQ(GetTypeName<int>().c_str(), tests[0]->type_param());
-  EXPECT_TRUE(tests[0]->should_run());
-
-  delete[] tests;
-#endif  // GTEST_HAS_TYPED_TEST
-}
-
-TEST(ApiTest, TestSuiteDisabledAccessorsWork) {
-  const TestSuite* test_suite = UnitTestHelper::FindTestSuite("DISABLED_Test");
-  ASSERT_TRUE(test_suite != nullptr);
-
-  EXPECT_STREQ("DISABLED_Test", test_suite->name());
-  EXPECT_TRUE(IsNull(test_suite->type_param()));
-  EXPECT_FALSE(test_suite->should_run());
-  EXPECT_EQ(1, test_suite->disabled_test_count());
-  EXPECT_EQ(0, test_suite->test_to_run_count());
-  ASSERT_EQ(1, test_suite->total_test_count());
-
-  const TestInfo* const test_info = test_suite->GetTestInfo(0);
-  EXPECT_STREQ("Dummy2", test_info->name());
-  EXPECT_STREQ("DISABLED_Test", test_info->test_suite_name());
-  EXPECT_TRUE(IsNull(test_info->value_param()));
-  EXPECT_TRUE(IsNull(test_info->type_param()));
-  EXPECT_FALSE(test_info->should_run());
-}
-
-// These two tests are here to provide support for testing
-// test_suite_to_run_count, disabled_test_count, and test_to_run_count.
-TEST(ApiTest, DISABLED_Dummy1) {}
-TEST(DISABLED_Test, Dummy2) {}
-
-class FinalSuccessChecker : public Environment {
- protected:
-  void TearDown() override {
-    UnitTest* unit_test = UnitTest::GetInstance();
-
-    EXPECT_EQ(1 + kTypedTestSuites, unit_test->successful_test_suite_count());
-    EXPECT_EQ(3 + kTypedTests, unit_test->successful_test_count());
-    EXPECT_EQ(0, unit_test->failed_test_suite_count());
-    EXPECT_EQ(0, unit_test->failed_test_count());
-    EXPECT_TRUE(unit_test->Passed());
-    EXPECT_FALSE(unit_test->Failed());
-    ASSERT_EQ(2 + kTypedTestSuites, unit_test->total_test_suite_count());
-
-    const TestSuite** const test_suites = UnitTestHelper::GetSortedTestSuites();
-
-    EXPECT_STREQ("ApiTest", test_suites[0]->name());
-    EXPECT_TRUE(IsNull(test_suites[0]->type_param()));
-    EXPECT_TRUE(test_suites[0]->should_run());
-    EXPECT_EQ(1, test_suites[0]->disabled_test_count());
-    ASSERT_EQ(4, test_suites[0]->total_test_count());
-    EXPECT_EQ(3, test_suites[0]->successful_test_count());
-    EXPECT_EQ(0, test_suites[0]->failed_test_count());
-    EXPECT_TRUE(test_suites[0]->Passed());
-    EXPECT_FALSE(test_suites[0]->Failed());
-
-    EXPECT_STREQ("DISABLED_Test", test_suites[1]->name());
-    EXPECT_TRUE(IsNull(test_suites[1]->type_param()));
-    EXPECT_FALSE(test_suites[1]->should_run());
-    EXPECT_EQ(1, test_suites[1]->disabled_test_count());
-    ASSERT_EQ(1, test_suites[1]->total_test_count());
-    EXPECT_EQ(0, test_suites[1]->successful_test_count());
-    EXPECT_EQ(0, test_suites[1]->failed_test_count());
-
-#if GTEST_HAS_TYPED_TEST
-    EXPECT_STREQ("TestSuiteWithCommentTest/0", test_suites[2]->name());
-    EXPECT_STREQ(GetTypeName<int>().c_str(), test_suites[2]->type_param());
-    EXPECT_TRUE(test_suites[2]->should_run());
-    EXPECT_EQ(0, test_suites[2]->disabled_test_count());
-    ASSERT_EQ(1, test_suites[2]->total_test_count());
-    EXPECT_EQ(1, test_suites[2]->successful_test_count());
-    EXPECT_EQ(0, test_suites[2]->failed_test_count());
-    EXPECT_TRUE(test_suites[2]->Passed());
-    EXPECT_FALSE(test_suites[2]->Failed());
-#endif  // GTEST_HAS_TYPED_TEST
-
-    const TestSuite* test_suite = UnitTestHelper::FindTestSuite("ApiTest");
-    const TestInfo** tests = UnitTestHelper::GetSortedTests(test_suite);
-    EXPECT_STREQ("DISABLED_Dummy1", tests[0]->name());
-    EXPECT_STREQ("ApiTest", tests[0]->test_suite_name());
-    EXPECT_FALSE(tests[0]->should_run());
-
-    EXPECT_STREQ("TestSuiteDisabledAccessorsWork", tests[1]->name());
-    EXPECT_STREQ("ApiTest", tests[1]->test_suite_name());
-    EXPECT_TRUE(IsNull(tests[1]->value_param()));
-    EXPECT_TRUE(IsNull(tests[1]->type_param()));
-    EXPECT_TRUE(tests[1]->should_run());
-    EXPECT_TRUE(tests[1]->result()->Passed());
-    EXPECT_EQ(0, tests[1]->result()->test_property_count());
-
-    EXPECT_STREQ("TestSuiteImmutableAccessorsWork", tests[2]->name());
-    EXPECT_STREQ("ApiTest", tests[2]->test_suite_name());
-    EXPECT_TRUE(IsNull(tests[2]->value_param()));
-    EXPECT_TRUE(IsNull(tests[2]->type_param()));
-    EXPECT_TRUE(tests[2]->should_run());
-    EXPECT_TRUE(tests[2]->result()->Passed());
-    EXPECT_EQ(0, tests[2]->result()->test_property_count());
-
-    EXPECT_STREQ("UnitTestImmutableAccessorsWork", tests[3]->name());
-    EXPECT_STREQ("ApiTest", tests[3]->test_suite_name());
-    EXPECT_TRUE(IsNull(tests[3]->value_param()));
-    EXPECT_TRUE(IsNull(tests[3]->type_param()));
-    EXPECT_TRUE(tests[3]->should_run());
-    EXPECT_TRUE(tests[3]->result()->Passed());
-    EXPECT_EQ(1, tests[3]->result()->test_property_count());
-    const TestProperty& property = tests[3]->result()->GetTestProperty(0);
-    EXPECT_STREQ("key", property.key());
-    EXPECT_STREQ("value", property.value());
-
-    delete[] tests;
-
-#if GTEST_HAS_TYPED_TEST
-    test_suite = UnitTestHelper::FindTestSuite("TestSuiteWithCommentTest/0");
-    tests = UnitTestHelper::GetSortedTests(test_suite);
-
-    EXPECT_STREQ("Dummy", tests[0]->name());
-    EXPECT_STREQ("TestSuiteWithCommentTest/0", tests[0]->test_suite_name());
-    EXPECT_TRUE(IsNull(tests[0]->value_param()));
-    EXPECT_STREQ(GetTypeName<int>().c_str(), tests[0]->type_param());
-    EXPECT_TRUE(tests[0]->should_run());
-    EXPECT_TRUE(tests[0]->result()->Passed());
-    EXPECT_EQ(0, tests[0]->result()->test_property_count());
-
-    delete[] tests;
-#endif  // GTEST_HAS_TYPED_TEST
-    delete[] test_suites;
-  }
-};
-
-}  // namespace internal
-}  // namespace testing
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-
-  AddGlobalTestEnvironment(new testing::internal::FinalSuccessChecker());
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/gtest_all_test.cc b/3rdparty/gtest/test/gtest_all_test.cc
deleted file mode 100644
index 615b29b7..00000000
--- a/3rdparty/gtest/test/gtest_all_test.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google C++ Testing and Mocking Framework (Google Test)
-//
-// Sometimes it's desirable to build most of Google Test's own tests
-// by compiling a single file.  This file serves this purpose.
-#include "test/googletest-filepath-test.cc"
-#include "test/googletest-message-test.cc"
-#include "test/googletest-options-test.cc"
-#include "test/googletest-port-test.cc"
-#include "test/googletest-test-part-test.cc"
-#include "test/gtest-typed-test2_test.cc"
-#include "test/gtest-typed-test_test.cc"
-#include "test/gtest_pred_impl_unittest.cc"
-#include "test/gtest_prod_test.cc"
-#include "test/gtest_skip_test.cc"
-#include "test/gtest_unittest.cc"
-#include "test/production.cc"
diff --git a/3rdparty/gtest/test/gtest_assert_by_exception_test.cc b/3rdparty/gtest/test/gtest_assert_by_exception_test.cc
deleted file mode 100644
index ada4cb30..00000000
--- a/3rdparty/gtest/test/gtest_assert_by_exception_test.cc
+++ /dev/null
@@ -1,116 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests Google Test's assert-by-exception mode with exceptions enabled.
-
-#include "gtest/gtest.h"
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdexcept>
-
-class ThrowListener : public testing::EmptyTestEventListener {
-  void OnTestPartResult(const testing::TestPartResult& result) override {
-    if (result.type() == testing::TestPartResult::kFatalFailure) {
-      throw testing::AssertionException(result);
-    }
-  }
-};
-
-// Prints the given failure message and exits the program with
-// non-zero.  We use this instead of a Google Test assertion to
-// indicate a failure, as the latter is been tested and cannot be
-// relied on.
-void Fail(const char* msg) {
-  printf("FAILURE: %s\n", msg);
-  fflush(stdout);
-  exit(1);
-}
-
-static void AssertFalse() {
-  ASSERT_EQ(2, 3) << "Expected failure";
-}
-
-// Tests that an assertion failure throws a subclass of
-// std::runtime_error.
-TEST(Test, Test) {
-  // A successful assertion shouldn't throw.
-  try {
-    EXPECT_EQ(3, 3);
-  } catch(...) {
-    Fail("A successful assertion wrongfully threw.");
-  }
-
-  // A successful assertion shouldn't throw.
-  try {
-    EXPECT_EQ(3, 4);
-  } catch(...) {
-    Fail("A failed non-fatal assertion wrongfully threw.");
-  }
-
-  // A failed assertion should throw.
-  try {
-    AssertFalse();
-  } catch(const testing::AssertionException& e) {
-    if (strstr(e.what(), "Expected failure") != nullptr) throw;
-
-    printf("%s",
-           "A failed assertion did throw an exception of the right type, "
-           "but the message is incorrect.  Instead of containing \"Expected "
-           "failure\", it is:\n");
-    Fail(e.what());
-  } catch(...) {
-    Fail("A failed assertion threw the wrong type of exception.");
-  }
-  Fail("A failed assertion should've thrown but didn't.");
-}
-
-int kTestForContinuingTest = 0;
-
-TEST(Test, Test2) {
-  kTestForContinuingTest = 1;
-}
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-  testing::UnitTest::GetInstance()->listeners().Append(new ThrowListener);
-
-  int result = RUN_ALL_TESTS();
-  if (result == 0) {
-    printf("RUN_ALL_TESTS returned %d\n", result);
-    Fail("Expected failure instead.");
-  }
-
-  if (kTestForContinuingTest == 0) {
-    Fail("Should have continued with other tests, but did not.");
-  }
-  return 0;
-}
diff --git a/3rdparty/gtest/test/gtest_environment_test.cc b/3rdparty/gtest/test/gtest_environment_test.cc
deleted file mode 100644
index 064bfc50..00000000
--- a/3rdparty/gtest/test/gtest_environment_test.cc
+++ /dev/null
@@ -1,188 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests using global test environments.
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-GTEST_DECLARE_string_(filter);
-}
-
-namespace {
-
-enum FailureType {
-  NO_FAILURE, NON_FATAL_FAILURE, FATAL_FAILURE
-};
-
-// For testing using global test environments.
-class MyEnvironment : public testing::Environment {
- public:
-  MyEnvironment() { Reset(); }
-
-  // Depending on the value of failure_in_set_up_, SetUp() will
-  // generate a non-fatal failure, generate a fatal failure, or
-  // succeed.
-  void SetUp() override {
-    set_up_was_run_ = true;
-
-    switch (failure_in_set_up_) {
-      case NON_FATAL_FAILURE:
-        ADD_FAILURE() << "Expected non-fatal failure in global set-up.";
-        break;
-      case FATAL_FAILURE:
-        FAIL() << "Expected fatal failure in global set-up.";
-        break;
-      default:
-        break;
-    }
-  }
-
-  // Generates a non-fatal failure.
-  void TearDown() override {
-    tear_down_was_run_ = true;
-    ADD_FAILURE() << "Expected non-fatal failure in global tear-down.";
-  }
-
-  // Resets the state of the environment s.t. it can be reused.
-  void Reset() {
-    failure_in_set_up_ = NO_FAILURE;
-    set_up_was_run_ = false;
-    tear_down_was_run_ = false;
-  }
-
-  // We call this function to set the type of failure SetUp() should
-  // generate.
-  void set_failure_in_set_up(FailureType type) {
-    failure_in_set_up_ = type;
-  }
-
-  // Was SetUp() run?
-  bool set_up_was_run() const { return set_up_was_run_; }
-
-  // Was TearDown() run?
-  bool tear_down_was_run() const { return tear_down_was_run_; }
-
- private:
-  FailureType failure_in_set_up_;
-  bool set_up_was_run_;
-  bool tear_down_was_run_;
-};
-
-// Was the TEST run?
-bool test_was_run;
-
-// The sole purpose of this TEST is to enable us to check whether it
-// was run.
-TEST(FooTest, Bar) {
-  test_was_run = true;
-}
-
-// Prints the message and aborts the program if condition is false.
-void Check(bool condition, const char* msg) {
-  if (!condition) {
-    printf("FAILED: %s\n", msg);
-    testing::internal::posix::Abort();
-  }
-}
-
-// Runs the tests.  Return true if and only if successful.
-//
-// The 'failure' parameter specifies the type of failure that should
-// be generated by the global set-up.
-int RunAllTests(MyEnvironment* env, FailureType failure) {
-  env->Reset();
-  env->set_failure_in_set_up(failure);
-  test_was_run = false;
-  testing::internal::GetUnitTestImpl()->ClearAdHocTestResult();
-  return RUN_ALL_TESTS();
-}
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  // Registers a global test environment, and verifies that the
-  // registration function returns its argument.
-  MyEnvironment* const env = new MyEnvironment;
-  Check(testing::AddGlobalTestEnvironment(env) == env,
-        "AddGlobalTestEnvironment() should return its argument.");
-
-  // Verifies that RUN_ALL_TESTS() runs the tests when the global
-  // set-up is successful.
-  Check(RunAllTests(env, NO_FAILURE) != 0,
-        "RUN_ALL_TESTS() should return non-zero, as the global tear-down "
-        "should generate a failure.");
-  Check(test_was_run,
-        "The tests should run, as the global set-up should generate no "
-        "failure");
-  Check(env->tear_down_was_run(),
-        "The global tear-down should run, as the global set-up was run.");
-
-  // Verifies that RUN_ALL_TESTS() runs the tests when the global
-  // set-up generates no fatal failure.
-  Check(RunAllTests(env, NON_FATAL_FAILURE) != 0,
-        "RUN_ALL_TESTS() should return non-zero, as both the global set-up "
-        "and the global tear-down should generate a non-fatal failure.");
-  Check(test_was_run,
-        "The tests should run, as the global set-up should generate no "
-        "fatal failure.");
-  Check(env->tear_down_was_run(),
-        "The global tear-down should run, as the global set-up was run.");
-
-  // Verifies that RUN_ALL_TESTS() runs no test when the global set-up
-  // generates a fatal failure.
-  Check(RunAllTests(env, FATAL_FAILURE) != 0,
-        "RUN_ALL_TESTS() should return non-zero, as the global set-up "
-        "should generate a fatal failure.");
-  Check(!test_was_run,
-        "The tests should not run, as the global set-up should generate "
-        "a fatal failure.");
-  Check(env->tear_down_was_run(),
-        "The global tear-down should run, as the global set-up was run.");
-
-  // Verifies that RUN_ALL_TESTS() doesn't do global set-up or
-  // tear-down when there is no test to run.
-  testing::GTEST_FLAG(filter) = "-*";
-  Check(RunAllTests(env, NO_FAILURE) == 0,
-        "RUN_ALL_TESTS() should return zero, as there is no test to run.");
-  Check(!env->set_up_was_run(),
-        "The global set-up should not run, as there is no test to run.");
-  Check(!env->tear_down_was_run(),
-        "The global tear-down should not run, "
-        "as the global set-up was not run.");
-
-  printf("PASS\n");
-  return 0;
-}
diff --git a/3rdparty/gtest/test/gtest_help_test.py b/3rdparty/gtest/test/gtest_help_test.py
deleted file mode 100644
index 582d24c2..00000000
--- a/3rdparty/gtest/test/gtest_help_test.py
+++ /dev/null
@@ -1,170 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Tests the --help flag of Google C++ Testing and Mocking Framework.
-
-SYNOPSIS
-       gtest_help_test.py --build_dir=BUILD/DIR
-         # where BUILD/DIR contains the built gtest_help_test_ file.
-       gtest_help_test.py
-"""
-
-import os
-import re
-import gtest_test_utils
-
-
-IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
-IS_WINDOWS = os.name == 'nt'
-
-PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath('gtest_help_test_')
-FLAG_PREFIX = '--gtest_'
-DEATH_TEST_STYLE_FLAG = FLAG_PREFIX + 'death_test_style'
-STREAM_RESULT_TO_FLAG = FLAG_PREFIX + 'stream_result_to'
-UNKNOWN_FLAG = FLAG_PREFIX + 'unknown_flag_for_testing'
-LIST_TESTS_FLAG = FLAG_PREFIX + 'list_tests'
-INCORRECT_FLAG_VARIANTS = [re.sub('^--', '-', LIST_TESTS_FLAG),
-                           re.sub('^--', '/', LIST_TESTS_FLAG),
-                           re.sub('_', '-', LIST_TESTS_FLAG)]
-INTERNAL_FLAG_FOR_TESTING = FLAG_PREFIX + 'internal_flag_for_testing'
-
-SUPPORTS_DEATH_TESTS = "DeathTest" in gtest_test_utils.Subprocess(
-    [PROGRAM_PATH, LIST_TESTS_FLAG]).output
-
-# The help message must match this regex.
-HELP_REGEX = re.compile(
-    FLAG_PREFIX + r'list_tests.*' +
-    FLAG_PREFIX + r'filter=.*' +
-    FLAG_PREFIX + r'also_run_disabled_tests.*' +
-    FLAG_PREFIX + r'repeat=.*' +
-    FLAG_PREFIX + r'shuffle.*' +
-    FLAG_PREFIX + r'random_seed=.*' +
-    FLAG_PREFIX + r'color=.*' +
-    FLAG_PREFIX + r'print_time.*' +
-    FLAG_PREFIX + r'output=.*' +
-    FLAG_PREFIX + r'break_on_failure.*' +
-    FLAG_PREFIX + r'throw_on_failure.*' +
-    FLAG_PREFIX + r'catch_exceptions=0.*',
-    re.DOTALL)
-
-
-def RunWithFlag(flag):
-  """Runs gtest_help_test_ with the given flag.
-
-  Returns:
-    the exit code and the text output as a tuple.
-  Args:
-    flag: the command-line flag to pass to gtest_help_test_, or None.
-  """
-
-  if flag is None:
-    command = [PROGRAM_PATH]
-  else:
-    command = [PROGRAM_PATH, flag]
-  child = gtest_test_utils.Subprocess(command)
-  return child.exit_code, child.output
-
-
-class GTestHelpTest(gtest_test_utils.TestCase):
-  """Tests the --help flag and its equivalent forms."""
-
-  def TestHelpFlag(self, flag):
-    """Verifies correct behavior when help flag is specified.
-
-    The right message must be printed and the tests must
-    skipped when the given flag is specified.
-
-    Args:
-      flag:  A flag to pass to the binary or None.
-    """
-
-    exit_code, output = RunWithFlag(flag)
-    self.assertEquals(0, exit_code)
-    self.assert_(HELP_REGEX.search(output), output)
-
-    if IS_LINUX:
-      self.assert_(STREAM_RESULT_TO_FLAG in output, output)
-    else:
-      self.assert_(STREAM_RESULT_TO_FLAG not in output, output)
-
-    if SUPPORTS_DEATH_TESTS and not IS_WINDOWS:
-      self.assert_(DEATH_TEST_STYLE_FLAG in output, output)
-    else:
-      self.assert_(DEATH_TEST_STYLE_FLAG not in output, output)
-
-  def TestNonHelpFlag(self, flag):
-    """Verifies correct behavior when no help flag is specified.
-
-    Verifies that when no help flag is specified, the tests are run
-    and the help message is not printed.
-
-    Args:
-      flag:  A flag to pass to the binary or None.
-    """
-
-    exit_code, output = RunWithFlag(flag)
-    self.assert_(exit_code != 0)
-    self.assert_(not HELP_REGEX.search(output), output)
-
-  def testPrintsHelpWithFullFlag(self):
-    self.TestHelpFlag('--help')
-
-  def testPrintsHelpWithShortFlag(self):
-    self.TestHelpFlag('-h')
-
-  def testPrintsHelpWithQuestionFlag(self):
-    self.TestHelpFlag('-?')
-
-  def testPrintsHelpWithWindowsStyleQuestionFlag(self):
-    self.TestHelpFlag('/?')
-
-  def testPrintsHelpWithUnrecognizedGoogleTestFlag(self):
-    self.TestHelpFlag(UNKNOWN_FLAG)
-
-  def testPrintsHelpWithIncorrectFlagStyle(self):
-    for incorrect_flag in INCORRECT_FLAG_VARIANTS:
-      self.TestHelpFlag(incorrect_flag)
-
-  def testRunsTestsWithoutHelpFlag(self):
-    """Verifies that when no help flag is specified, the tests are run
-    and the help message is not printed."""
-
-    self.TestNonHelpFlag(None)
-
-  def testRunsTestsWithGtestInternalFlag(self):
-    """Verifies that the tests are run and no help message is printed when
-    a flag starting with Google Test prefix and 'internal_' is supplied."""
-
-    self.TestNonHelpFlag(INTERNAL_FLAG_FOR_TESTING)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/gtest_help_test_.cc b/3rdparty/gtest/test/gtest_help_test_.cc
deleted file mode 100644
index 750ae6ce..00000000
--- a/3rdparty/gtest/test/gtest_help_test_.cc
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This program is meant to be run by gtest_help_test.py.  Do not run
-// it directly.
-
-#include "gtest/gtest.h"
-
-// When a help flag is specified, this program should skip the tests
-// and exit with 0; otherwise the following test will be executed,
-// causing this program to exit with a non-zero code.
-TEST(HelpFlagTest, ShouldNotBeRun) {
-  ASSERT_TRUE(false) << "Tests shouldn't be run when --help is specified.";
-}
-
-#if GTEST_HAS_DEATH_TEST
-TEST(DeathTest, UsedByPythonScriptToDetectSupportForDeathTestsInThisBinary) {}
-#endif
diff --git a/3rdparty/gtest/test/gtest_json_test_utils.py b/3rdparty/gtest/test/gtest_json_test_utils.py
deleted file mode 100644
index 62bbfc28..00000000
--- a/3rdparty/gtest/test/gtest_json_test_utils.py
+++ /dev/null
@@ -1,60 +0,0 @@
-# Copyright 2018, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test utilities for gtest_json_output."""
-
-import re
-
-
-def normalize(obj):
-  """Normalize output object.
-
-  Args:
-     obj: Google Test's JSON output object to normalize.
-
-  Returns:
-     Normalized output without any references to transient information that may
-     change from run to run.
-  """
-  def _normalize(key, value):
-    if key == 'time':
-      return re.sub(r'^\d+(\.\d+)?s$', '*', value)
-    elif key == 'timestamp':
-      return re.sub(r'^\d{4}-\d\d-\d\dT\d\d:\d\d:\d\dZ$', '*', value)
-    elif key == 'failure':
-      value = re.sub(r'^.*[/\\](.*:)\d+\n', '\\1*\n', value)
-      return re.sub(r'Stack trace:\n(.|\n)*', 'Stack trace:\n*', value)
-    else:
-      return normalize(value)
-  if isinstance(obj, dict):
-    return {k: _normalize(k, v) for k, v in obj.items()}
-  if isinstance(obj, list):
-    return [normalize(x) for x in obj]
-  else:
-    return obj
diff --git a/3rdparty/gtest/test/gtest_list_output_unittest.py b/3rdparty/gtest/test/gtest_list_output_unittest.py
deleted file mode 100644
index 3bba7ea2..00000000
--- a/3rdparty/gtest/test/gtest_list_output_unittest.py
+++ /dev/null
@@ -1,141 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""Unit test for Google Test's --gtest_list_tests flag.
-
-A user can ask Google Test to list all tests by specifying the
---gtest_list_tests flag. If output is requested, via --gtest_output=xml
-or --gtest_output=json, the tests are listed, with extra information in the
-output file.
-This script tests such functionality by invoking gtest_list_output_unittest_
- (a program written with Google Test) the command line flags.
-"""
-
-import os
-import re
-import gtest_test_utils
-
-GTEST_LIST_TESTS_FLAG = '--gtest_list_tests'
-GTEST_OUTPUT_FLAG = '--gtest_output'
-
-EXPECTED_XML = """<\?xml version="1.0" encoding="UTF-8"\?>
-<testsuites tests="2" name="AllTests">
-  <testsuite name="FooTest" tests="2">
-    <testcase name="Test1" file=".*gtest_list_output_unittest_.cc" line="43" />
-    <testcase name="Test2" file=".*gtest_list_output_unittest_.cc" line="45" />
-  </testsuite>
-</testsuites>
-"""
-
-EXPECTED_JSON = """{
-  "tests": 2,
-  "name": "AllTests",
-  "testsuites": \[
-    {
-      "name": "FooTest",
-      "tests": 2,
-      "testsuite": \[
-        {
-          "name": "Test1",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 43
-        },
-        {
-          "name": "Test2",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 45
-        }
-      \]
-    }
-  \]
-}
-"""
-
-
-class GTestListTestsOutputUnitTest(gtest_test_utils.TestCase):
-  """Unit test for Google Test's list tests with output to file functionality.
-  """
-
-  def testXml(self):
-    """Verifies XML output for listing tests in a Google Test binary.
-
-    Runs a test program that generates an empty XML output, and
-    tests that the XML output is expected.
-    """
-    self._TestOutput('xml', EXPECTED_XML)
-
-  def testJSON(self):
-    """Verifies XML output for listing tests in a Google Test binary.
-
-    Runs a test program that generates an empty XML output, and
-    tests that the XML output is expected.
-    """
-    self._TestOutput('json', EXPECTED_JSON)
-
-  def _GetOutput(self, out_format):
-    file_path = os.path.join(gtest_test_utils.GetTempDir(),
-                             'test_out.' + out_format)
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(
-        'gtest_list_output_unittest_')
-
-    command = ([
-        gtest_prog_path,
-        '%s=%s:%s' % (GTEST_OUTPUT_FLAG, out_format, file_path),
-        '--gtest_list_tests'
-    ])
-    environ_copy = os.environ.copy()
-    p = gtest_test_utils.Subprocess(
-        command, env=environ_copy, working_dir=gtest_test_utils.GetTempDir())
-
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-    with open(file_path) as f:
-      result = f.read()
-    return result
-
-  def _TestOutput(self, test_format, expected_output):
-    actual = self._GetOutput(test_format)
-    actual_lines = actual.splitlines()
-    expected_lines = expected_output.splitlines()
-    line_count = 0
-    for actual_line in actual_lines:
-      expected_line = expected_lines[line_count]
-      expected_line_re = re.compile(expected_line.strip())
-      self.assert_(
-          expected_line_re.match(actual_line.strip()),
-          ('actual output of "%s",\n'
-           'which does not match expected regex of "%s"\n'
-           'on line %d' % (actual, expected_output, line_count)))
-      line_count = line_count + 1
-
-
-if __name__ == '__main__':
-  os.environ['GTEST_STACK_TRACE_DEPTH'] = '1'
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/gtest_list_output_unittest_.cc b/3rdparty/gtest/test/gtest_list_output_unittest_.cc
deleted file mode 100644
index b1c7b4de..00000000
--- a/3rdparty/gtest/test/gtest_list_output_unittest_.cc
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2018, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Author: david.schuldenfrei@gmail.com (David Schuldenfrei)
-
-// Unit test for Google Test's --gtest_list_tests and --gtest_output flag.
-//
-// A user can ask Google Test to list all tests that will run,
-// and have the output saved in a Json/Xml file.
-// The tests will not be run after listing.
-//
-// This program will be invoked from a Python unit test.
-// Don't run it directly.
-
-#include "gtest/gtest.h"
-
-TEST(FooTest, Test1) {}
-
-TEST(FooTest, Test2) {}
-
-int main(int argc, char **argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/gtest_main_unittest.cc b/3rdparty/gtest/test/gtest_main_unittest.cc
deleted file mode 100644
index eddedeab..00000000
--- a/3rdparty/gtest/test/gtest_main_unittest.cc
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest.h"
-
-// Tests that we don't have to define main() when we link to
-// gtest_main instead of gtest.
-
-namespace {
-
-TEST(GTestMainTest, ShouldSucceed) {
-}
-
-}  // namespace
-
-// We are using the main() function defined in gtest_main.cc, so we
-// don't define it here.
diff --git a/3rdparty/gtest/test/gtest_no_test_unittest.cc b/3rdparty/gtest/test/gtest_no_test_unittest.cc
deleted file mode 100644
index d4f88dbf..00000000
--- a/3rdparty/gtest/test/gtest_no_test_unittest.cc
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Tests that a Google Test program that has no test defined can run
-// successfully.
-
-#include "gtest/gtest.h"
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  // An ad-hoc assertion outside of all tests.
-  //
-  // This serves three purposes:
-  //
-  // 1. It verifies that an ad-hoc assertion can be executed even if
-  //    no test is defined.
-  // 2. It verifies that a failed ad-hoc assertion causes the test
-  //    program to fail.
-  // 3. We had a bug where the XML output won't be generated if an
-  //    assertion is executed before RUN_ALL_TESTS() is called, even
-  //    though --gtest_output=xml is specified.  This makes sure the
-  //    bug is fixed and doesn't regress.
-  EXPECT_EQ(1, 2);
-
-  // The above EXPECT_EQ() should cause RUN_ALL_TESTS() to return non-zero.
-  return RUN_ALL_TESTS() ? 0 : 1;
-}
diff --git a/3rdparty/gtest/test/gtest_pred_impl_unittest.cc b/3rdparty/gtest/test/gtest_pred_impl_unittest.cc
deleted file mode 100644
index 1afe5e2d..00000000
--- a/3rdparty/gtest/test/gtest_pred_impl_unittest.cc
+++ /dev/null
@@ -1,2427 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file is AUTOMATICALLY GENERATED on 01/02/2019 by command
-// 'gen_gtest_pred_impl.py 5'.  DO NOT EDIT BY HAND!
-
-// Regression test for gtest_pred_impl.h
-//
-// This file is generated by a script and quite long.  If you intend to
-// learn how Google Test works by reading its unit tests, read
-// gtest_unittest.cc instead.
-//
-// This is intended as a regression test for the Google Test predicate
-// assertions.  We compile it as part of the gtest_unittest target
-// only to keep the implementation tidy and compact, as it is quite
-// involved to set up the stage for testing Google Test using Google
-// Test itself.
-//
-// Currently, gtest_unittest takes ~11 seconds to run in the testing
-// daemon.  In the future, if it grows too large and needs much more
-// time to finish, we should consider separating this file into a
-// stand-alone regression test.
-
-#include <iostream>
-
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-
-// A user-defined data type.
-struct Bool {
-  explicit Bool(int val) : value(val != 0) {}
-
-  bool operator>(int n) const { return value > Bool(n).value; }
-
-  Bool operator+(const Bool& rhs) const { return Bool(value + rhs.value); }
-
-  bool operator==(const Bool& rhs) const { return value == rhs.value; }
-
-  bool value;
-};
-
-// Enables Bool to be used in assertions.
-std::ostream& operator<<(std::ostream& os, const Bool& x) {
-  return os << (x.value ? "true" : "false");
-}
-
-// Sample functions/functors for testing unary predicate assertions.
-
-// A unary predicate function.
-template <typename T1>
-bool PredFunction1(T1 v1) {
-  return v1 > 0;
-}
-
-// The following two functions are needed to circumvent a bug in
-// gcc 2.95.3, which sometimes has problem with the above template
-// function.
-bool PredFunction1Int(int v1) {
-  return v1 > 0;
-}
-bool PredFunction1Bool(Bool v1) {
-  return v1 > 0;
-}
-
-// A unary predicate functor.
-struct PredFunctor1 {
-  template <typename T1>
-  bool operator()(const T1& v1) {
-    return v1 > 0;
-  }
-};
-
-// A unary predicate-formatter function.
-template <typename T1>
-testing::AssertionResult PredFormatFunction1(const char* e1,
-                                             const T1& v1) {
-  if (PredFunction1(v1))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1
-      << " is expected to be positive, but evaluates to "
-      << v1 << ".";
-}
-
-// A unary predicate-formatter functor.
-struct PredFormatFunctor1 {
-  template <typename T1>
-  testing::AssertionResult operator()(const char* e1,
-                                      const T1& v1) const {
-    return PredFormatFunction1(e1, v1);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT1.
-
-class Predicate1Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-};
-
-bool Predicate1Test::expected_to_finish_;
-bool Predicate1Test::finished_;
-int Predicate1Test::n1_;
-
-typedef Predicate1Test EXPECT_PRED_FORMAT1Test;
-typedef Predicate1Test ASSERT_PRED_FORMAT1Test;
-typedef Predicate1Test EXPECT_PRED1Test;
-typedef Predicate1Test ASSERT_PRED1Test;
-
-// Tests a successful EXPECT_PRED1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED1Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED1(PredFunction1Int,
-               ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED1Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED1(PredFunction1Bool,
-               Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED1Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED1(PredFunctor1(),
-               ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED1Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED1(PredFunctor1(),
-               Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED1Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(PredFunction1Int,
-                 n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED1Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(PredFunction1Bool,
-                 Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED1Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(PredFunctor1(),
-                 n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED1Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(PredFunctor1(),
-                 Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED1Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED1(PredFunction1Int,
-               ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED1Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED1(PredFunction1Bool,
-               Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED1Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED1(PredFunctor1(),
-               ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED1Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED1(PredFunctor1(),
-               Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED1Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED1(PredFunction1Int,
-                 n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED1Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED1(PredFunction1Bool,
-                 Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED1Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED1(PredFunctor1(),
-                 n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED1Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED1(PredFunctor1(),
-                 Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT1(PredFormatFunction1,
-                      ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT1(PredFormatFunction1,
-                      Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT1(PredFormatFunctor1(),
-                      ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT1(PredFormatFunctor1(),
-                      Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT1(PredFormatFunction1,
-                        n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT1(PredFormatFunction1,
-                        Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT1(PredFormatFunctor1(),
-                        n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT1(PredFormatFunctor1(),
-                        Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT1(PredFormatFunction1,
-                      ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT1(PredFormatFunction1,
-                      Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT1(PredFormatFunctor1(),
-                      ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT1(PredFormatFunctor1(),
-                      Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(PredFormatFunction1,
-                        n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(PredFormatFunction1,
-                        Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(PredFormatFunctor1(),
-                        n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(PredFormatFunctor1(),
-                        Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-// Sample functions/functors for testing binary predicate assertions.
-
-// A binary predicate function.
-template <typename T1, typename T2>
-bool PredFunction2(T1 v1, T2 v2) {
-  return v1 + v2 > 0;
-}
-
-// The following two functions are needed to circumvent a bug in
-// gcc 2.95.3, which sometimes has problem with the above template
-// function.
-bool PredFunction2Int(int v1, int v2) {
-  return v1 + v2 > 0;
-}
-bool PredFunction2Bool(Bool v1, Bool v2) {
-  return v1 + v2 > 0;
-}
-
-// A binary predicate functor.
-struct PredFunctor2 {
-  template <typename T1, typename T2>
-  bool operator()(const T1& v1,
-                  const T2& v2) {
-    return v1 + v2 > 0;
-  }
-};
-
-// A binary predicate-formatter function.
-template <typename T1, typename T2>
-testing::AssertionResult PredFormatFunction2(const char* e1,
-                                             const char* e2,
-                                             const T1& v1,
-                                             const T2& v2) {
-  if (PredFunction2(v1, v2))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1 << " + " << e2
-      << " is expected to be positive, but evaluates to "
-      << v1 + v2 << ".";
-}
-
-// A binary predicate-formatter functor.
-struct PredFormatFunctor2 {
-  template <typename T1, typename T2>
-  testing::AssertionResult operator()(const char* e1,
-                                      const char* e2,
-                                      const T1& v1,
-                                      const T2& v2) const {
-    return PredFormatFunction2(e1, e2, v1, v2);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT2.
-
-class Predicate2Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = n2_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-    EXPECT_EQ(1, n2_) <<
-        "The predicate assertion didn't evaluate argument 3 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-  static int n2_;
-};
-
-bool Predicate2Test::expected_to_finish_;
-bool Predicate2Test::finished_;
-int Predicate2Test::n1_;
-int Predicate2Test::n2_;
-
-typedef Predicate2Test EXPECT_PRED_FORMAT2Test;
-typedef Predicate2Test ASSERT_PRED_FORMAT2Test;
-typedef Predicate2Test EXPECT_PRED2Test;
-typedef Predicate2Test ASSERT_PRED2Test;
-
-// Tests a successful EXPECT_PRED2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED2Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED2(PredFunction2Int,
-               ++n1_,
-               ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED2Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED2(PredFunction2Bool,
-               Bool(++n1_),
-               Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED2Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED2(PredFunctor2(),
-               ++n1_,
-               ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED2Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED2(PredFunctor2(),
-               Bool(++n1_),
-               Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED2Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(PredFunction2Int,
-                 n1_++,
-                 n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED2Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(PredFunction2Bool,
-                 Bool(n1_++),
-                 Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED2Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(PredFunctor2(),
-                 n1_++,
-                 n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED2Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(PredFunctor2(),
-                 Bool(n1_++),
-                 Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED2Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED2(PredFunction2Int,
-               ++n1_,
-               ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED2Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED2(PredFunction2Bool,
-               Bool(++n1_),
-               Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED2Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED2(PredFunctor2(),
-               ++n1_,
-               ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED2Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED2(PredFunctor2(),
-               Bool(++n1_),
-               Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED2Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED2(PredFunction2Int,
-                 n1_++,
-                 n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED2Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED2(PredFunction2Bool,
-                 Bool(n1_++),
-                 Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED2Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED2(PredFunctor2(),
-                 n1_++,
-                 n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED2Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED2(PredFunctor2(),
-                 Bool(n1_++),
-                 Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT2(PredFormatFunction2,
-                      ++n1_,
-                      ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT2(PredFormatFunction2,
-                      Bool(++n1_),
-                      Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT2(PredFormatFunctor2(),
-                      ++n1_,
-                      ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT2(PredFormatFunctor2(),
-                      Bool(++n1_),
-                      Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(PredFormatFunction2,
-                        n1_++,
-                        n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(PredFormatFunction2,
-                        Bool(n1_++),
-                        Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(PredFormatFunctor2(),
-                        n1_++,
-                        n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(PredFormatFunctor2(),
-                        Bool(n1_++),
-                        Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT2(PredFormatFunction2,
-                      ++n1_,
-                      ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT2(PredFormatFunction2,
-                      Bool(++n1_),
-                      Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT2(PredFormatFunctor2(),
-                      ++n1_,
-                      ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT2(PredFormatFunctor2(),
-                      Bool(++n1_),
-                      Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(PredFormatFunction2,
-                        n1_++,
-                        n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(PredFormatFunction2,
-                        Bool(n1_++),
-                        Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(PredFormatFunctor2(),
-                        n1_++,
-                        n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(PredFormatFunctor2(),
-                        Bool(n1_++),
-                        Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-// Sample functions/functors for testing ternary predicate assertions.
-
-// A ternary predicate function.
-template <typename T1, typename T2, typename T3>
-bool PredFunction3(T1 v1, T2 v2, T3 v3) {
-  return v1 + v2 + v3 > 0;
-}
-
-// The following two functions are needed to circumvent a bug in
-// gcc 2.95.3, which sometimes has problem with the above template
-// function.
-bool PredFunction3Int(int v1, int v2, int v3) {
-  return v1 + v2 + v3 > 0;
-}
-bool PredFunction3Bool(Bool v1, Bool v2, Bool v3) {
-  return v1 + v2 + v3 > 0;
-}
-
-// A ternary predicate functor.
-struct PredFunctor3 {
-  template <typename T1, typename T2, typename T3>
-  bool operator()(const T1& v1,
-                  const T2& v2,
-                  const T3& v3) {
-    return v1 + v2 + v3 > 0;
-  }
-};
-
-// A ternary predicate-formatter function.
-template <typename T1, typename T2, typename T3>
-testing::AssertionResult PredFormatFunction3(const char* e1,
-                                             const char* e2,
-                                             const char* e3,
-                                             const T1& v1,
-                                             const T2& v2,
-                                             const T3& v3) {
-  if (PredFunction3(v1, v2, v3))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1 << " + " << e2 << " + " << e3
-      << " is expected to be positive, but evaluates to "
-      << v1 + v2 + v3 << ".";
-}
-
-// A ternary predicate-formatter functor.
-struct PredFormatFunctor3 {
-  template <typename T1, typename T2, typename T3>
-  testing::AssertionResult operator()(const char* e1,
-                                      const char* e2,
-                                      const char* e3,
-                                      const T1& v1,
-                                      const T2& v2,
-                                      const T3& v3) const {
-    return PredFormatFunction3(e1, e2, e3, v1, v2, v3);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT3.
-
-class Predicate3Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = n2_ = n3_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-    EXPECT_EQ(1, n2_) <<
-        "The predicate assertion didn't evaluate argument 3 "
-        "exactly once.";
-    EXPECT_EQ(1, n3_) <<
-        "The predicate assertion didn't evaluate argument 4 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-  static int n2_;
-  static int n3_;
-};
-
-bool Predicate3Test::expected_to_finish_;
-bool Predicate3Test::finished_;
-int Predicate3Test::n1_;
-int Predicate3Test::n2_;
-int Predicate3Test::n3_;
-
-typedef Predicate3Test EXPECT_PRED_FORMAT3Test;
-typedef Predicate3Test ASSERT_PRED_FORMAT3Test;
-typedef Predicate3Test EXPECT_PRED3Test;
-typedef Predicate3Test ASSERT_PRED3Test;
-
-// Tests a successful EXPECT_PRED3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED3Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED3(PredFunction3Int,
-               ++n1_,
-               ++n2_,
-               ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED3Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED3(PredFunction3Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED3Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED3(PredFunctor3(),
-               ++n1_,
-               ++n2_,
-               ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED3Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED3(PredFunctor3(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED3Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(PredFunction3Int,
-                 n1_++,
-                 n2_++,
-                 n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED3Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(PredFunction3Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED3Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(PredFunctor3(),
-                 n1_++,
-                 n2_++,
-                 n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED3Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(PredFunctor3(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED3Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED3(PredFunction3Int,
-               ++n1_,
-               ++n2_,
-               ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED3Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED3(PredFunction3Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED3Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED3(PredFunctor3(),
-               ++n1_,
-               ++n2_,
-               ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED3Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED3(PredFunctor3(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED3Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(PredFunction3Int,
-                 n1_++,
-                 n2_++,
-                 n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED3Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(PredFunction3Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED3Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(PredFunctor3(),
-                 n1_++,
-                 n2_++,
-                 n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED3Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(PredFunctor3(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT3(PredFormatFunction3,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT3(PredFormatFunction3,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT3(PredFormatFunctor3(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT3(PredFormatFunctor3(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT3(PredFormatFunction3,
-                        n1_++,
-                        n2_++,
-                        n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT3(PredFormatFunction3,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT3(PredFormatFunctor3(),
-                        n1_++,
-                        n2_++,
-                        n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT3(PredFormatFunctor3(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT3(PredFormatFunction3,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT3(PredFormatFunction3,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT3(PredFormatFunctor3(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT3(PredFormatFunctor3(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT3(PredFormatFunction3,
-                        n1_++,
-                        n2_++,
-                        n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT3(PredFormatFunction3,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT3(PredFormatFunctor3(),
-                        n1_++,
-                        n2_++,
-                        n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT3(PredFormatFunctor3(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-// Sample functions/functors for testing 4-ary predicate assertions.
-
-// A 4-ary predicate function.
-template <typename T1, typename T2, typename T3, typename T4>
-bool PredFunction4(T1 v1, T2 v2, T3 v3, T4 v4) {
-  return v1 + v2 + v3 + v4 > 0;
-}
-
-// The following two functions are needed to circumvent a bug in
-// gcc 2.95.3, which sometimes has problem with the above template
-// function.
-bool PredFunction4Int(int v1, int v2, int v3, int v4) {
-  return v1 + v2 + v3 + v4 > 0;
-}
-bool PredFunction4Bool(Bool v1, Bool v2, Bool v3, Bool v4) {
-  return v1 + v2 + v3 + v4 > 0;
-}
-
-// A 4-ary predicate functor.
-struct PredFunctor4 {
-  template <typename T1, typename T2, typename T3, typename T4>
-  bool operator()(const T1& v1,
-                  const T2& v2,
-                  const T3& v3,
-                  const T4& v4) {
-    return v1 + v2 + v3 + v4 > 0;
-  }
-};
-
-// A 4-ary predicate-formatter function.
-template <typename T1, typename T2, typename T3, typename T4>
-testing::AssertionResult PredFormatFunction4(const char* e1,
-                                             const char* e2,
-                                             const char* e3,
-                                             const char* e4,
-                                             const T1& v1,
-                                             const T2& v2,
-                                             const T3& v3,
-                                             const T4& v4) {
-  if (PredFunction4(v1, v2, v3, v4))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1 << " + " << e2 << " + " << e3 << " + " << e4
-      << " is expected to be positive, but evaluates to "
-      << v1 + v2 + v3 + v4 << ".";
-}
-
-// A 4-ary predicate-formatter functor.
-struct PredFormatFunctor4 {
-  template <typename T1, typename T2, typename T3, typename T4>
-  testing::AssertionResult operator()(const char* e1,
-                                      const char* e2,
-                                      const char* e3,
-                                      const char* e4,
-                                      const T1& v1,
-                                      const T2& v2,
-                                      const T3& v3,
-                                      const T4& v4) const {
-    return PredFormatFunction4(e1, e2, e3, e4, v1, v2, v3, v4);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT4.
-
-class Predicate4Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = n2_ = n3_ = n4_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-    EXPECT_EQ(1, n2_) <<
-        "The predicate assertion didn't evaluate argument 3 "
-        "exactly once.";
-    EXPECT_EQ(1, n3_) <<
-        "The predicate assertion didn't evaluate argument 4 "
-        "exactly once.";
-    EXPECT_EQ(1, n4_) <<
-        "The predicate assertion didn't evaluate argument 5 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-  static int n2_;
-  static int n3_;
-  static int n4_;
-};
-
-bool Predicate4Test::expected_to_finish_;
-bool Predicate4Test::finished_;
-int Predicate4Test::n1_;
-int Predicate4Test::n2_;
-int Predicate4Test::n3_;
-int Predicate4Test::n4_;
-
-typedef Predicate4Test EXPECT_PRED_FORMAT4Test;
-typedef Predicate4Test ASSERT_PRED_FORMAT4Test;
-typedef Predicate4Test EXPECT_PRED4Test;
-typedef Predicate4Test ASSERT_PRED4Test;
-
-// Tests a successful EXPECT_PRED4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED4Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED4(PredFunction4Int,
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED4Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED4(PredFunction4Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED4Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED4(PredFunctor4(),
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED4Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED4(PredFunctor4(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED4Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED4(PredFunction4Int,
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED4Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED4(PredFunction4Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED4Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED4(PredFunctor4(),
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED4Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED4(PredFunctor4(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED4Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED4(PredFunction4Int,
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED4Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED4(PredFunction4Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED4Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED4(PredFunctor4(),
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED4Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED4(PredFunctor4(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED4Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED4(PredFunction4Int,
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED4Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED4(PredFunction4Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED4Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED4(PredFunctor4(),
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED4Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED4(PredFunctor4(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT4(PredFormatFunction4,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT4(PredFormatFunction4,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT4(PredFormatFunctor4(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT4(PredFormatFunctor4(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(PredFormatFunction4,
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(PredFormatFunction4,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(PredFormatFunctor4(),
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(PredFormatFunctor4(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT4(PredFormatFunction4,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT4(PredFormatFunction4,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT4(PredFormatFunctor4(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT4(PredFormatFunctor4(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT4(PredFormatFunction4,
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT4(PredFormatFunction4,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT4(PredFormatFunctor4(),
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT4(PredFormatFunctor4(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-// Sample functions/functors for testing 5-ary predicate assertions.
-
-// A 5-ary predicate function.
-template <typename T1, typename T2, typename T3, typename T4, typename T5>
-bool PredFunction5(T1 v1, T2 v2, T3 v3, T4 v4, T5 v5) {
-  return v1 + v2 + v3 + v4 + v5 > 0;
-}
-
-// The following two functions are needed to circumvent a bug in
-// gcc 2.95.3, which sometimes has problem with the above template
-// function.
-bool PredFunction5Int(int v1, int v2, int v3, int v4, int v5) {
-  return v1 + v2 + v3 + v4 + v5 > 0;
-}
-bool PredFunction5Bool(Bool v1, Bool v2, Bool v3, Bool v4, Bool v5) {
-  return v1 + v2 + v3 + v4 + v5 > 0;
-}
-
-// A 5-ary predicate functor.
-struct PredFunctor5 {
-  template <typename T1, typename T2, typename T3, typename T4, typename T5>
-  bool operator()(const T1& v1,
-                  const T2& v2,
-                  const T3& v3,
-                  const T4& v4,
-                  const T5& v5) {
-    return v1 + v2 + v3 + v4 + v5 > 0;
-  }
-};
-
-// A 5-ary predicate-formatter function.
-template <typename T1, typename T2, typename T3, typename T4, typename T5>
-testing::AssertionResult PredFormatFunction5(const char* e1,
-                                             const char* e2,
-                                             const char* e3,
-                                             const char* e4,
-                                             const char* e5,
-                                             const T1& v1,
-                                             const T2& v2,
-                                             const T3& v3,
-                                             const T4& v4,
-                                             const T5& v5) {
-  if (PredFunction5(v1, v2, v3, v4, v5))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1 << " + " << e2 << " + " << e3 << " + " << e4 << " + " << e5
-      << " is expected to be positive, but evaluates to "
-      << v1 + v2 + v3 + v4 + v5 << ".";
-}
-
-// A 5-ary predicate-formatter functor.
-struct PredFormatFunctor5 {
-  template <typename T1, typename T2, typename T3, typename T4, typename T5>
-  testing::AssertionResult operator()(const char* e1,
-                                      const char* e2,
-                                      const char* e3,
-                                      const char* e4,
-                                      const char* e5,
-                                      const T1& v1,
-                                      const T2& v2,
-                                      const T3& v3,
-                                      const T4& v4,
-                                      const T5& v5) const {
-    return PredFormatFunction5(e1, e2, e3, e4, e5, v1, v2, v3, v4, v5);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT5.
-
-class Predicate5Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = n2_ = n3_ = n4_ = n5_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-    EXPECT_EQ(1, n2_) <<
-        "The predicate assertion didn't evaluate argument 3 "
-        "exactly once.";
-    EXPECT_EQ(1, n3_) <<
-        "The predicate assertion didn't evaluate argument 4 "
-        "exactly once.";
-    EXPECT_EQ(1, n4_) <<
-        "The predicate assertion didn't evaluate argument 5 "
-        "exactly once.";
-    EXPECT_EQ(1, n5_) <<
-        "The predicate assertion didn't evaluate argument 6 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-  static int n2_;
-  static int n3_;
-  static int n4_;
-  static int n5_;
-};
-
-bool Predicate5Test::expected_to_finish_;
-bool Predicate5Test::finished_;
-int Predicate5Test::n1_;
-int Predicate5Test::n2_;
-int Predicate5Test::n3_;
-int Predicate5Test::n4_;
-int Predicate5Test::n5_;
-
-typedef Predicate5Test EXPECT_PRED_FORMAT5Test;
-typedef Predicate5Test ASSERT_PRED_FORMAT5Test;
-typedef Predicate5Test EXPECT_PRED5Test;
-typedef Predicate5Test ASSERT_PRED5Test;
-
-// Tests a successful EXPECT_PRED5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED5Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED5(PredFunction5Int,
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_,
-               ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED5Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED5(PredFunction5Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_),
-               Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED5Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED5(PredFunctor5(),
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_,
-               ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED5Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED5(PredFunctor5(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_),
-               Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED5Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED5(PredFunction5Int,
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++,
-                 n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED5Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED5(PredFunction5Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++),
-                 Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED5Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED5(PredFunctor5(),
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++,
-                 n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED5Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED5(PredFunctor5(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++),
-                 Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED5Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED5(PredFunction5Int,
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_,
-               ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED5Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED5(PredFunction5Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_),
-               Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED5Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED5(PredFunctor5(),
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_,
-               ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED5Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED5(PredFunctor5(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_),
-               Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED5Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED5(PredFunction5Int,
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++,
-                 n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED5Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED5(PredFunction5Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++),
-                 Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED5Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED5(PredFunctor5(),
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++,
-                 n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED5Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED5(PredFunctor5(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++),
-                 Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT5(PredFormatFunction5,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_,
-                      ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT5(PredFormatFunction5,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_),
-                      Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT5(PredFormatFunctor5(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_,
-                      ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT5(PredFormatFunctor5(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_),
-                      Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT5(PredFormatFunction5,
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++,
-                        n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT5(PredFormatFunction5,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++),
-                        Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT5(PredFormatFunctor5(),
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++,
-                        n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT5(PredFormatFunctor5(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++),
-                        Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT5(PredFormatFunction5,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_,
-                      ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT5(PredFormatFunction5,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_),
-                      Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT5(PredFormatFunctor5(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_,
-                      ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT5(PredFormatFunctor5(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_),
-                      Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(PredFormatFunction5,
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++,
-                        n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(PredFormatFunction5,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++),
-                        Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(PredFormatFunctor5(),
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++,
-                        n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(PredFormatFunctor5(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++),
-                        Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
diff --git a/3rdparty/gtest/test/gtest_premature_exit_test.cc b/3rdparty/gtest/test/gtest_premature_exit_test.cc
deleted file mode 100644
index 1d1187ef..00000000
--- a/3rdparty/gtest/test/gtest_premature_exit_test.cc
+++ /dev/null
@@ -1,126 +0,0 @@
-// Copyright 2013, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests that Google Test manipulates the premature-exit-detection
-// file correctly.
-
-#include <stdio.h>
-
-#include "gtest/gtest.h"
-
-using ::testing::InitGoogleTest;
-using ::testing::Test;
-using ::testing::internal::posix::GetEnv;
-using ::testing::internal::posix::Stat;
-using ::testing::internal::posix::StatStruct;
-
-namespace {
-
-class PrematureExitTest : public Test {
- public:
-  // Returns true if and only if the given file exists.
-  static bool FileExists(const char* filepath) {
-    StatStruct stat;
-    return Stat(filepath, &stat) == 0;
-  }
-
- protected:
-  PrematureExitTest() {
-    premature_exit_file_path_ = GetEnv("TEST_PREMATURE_EXIT_FILE");
-
-    // Normalize NULL to "" for ease of handling.
-    if (premature_exit_file_path_ == nullptr) {
-      premature_exit_file_path_ = "";
-    }
-  }
-
-  // Returns true if and only if the premature-exit file exists.
-  bool PrematureExitFileExists() const {
-    return FileExists(premature_exit_file_path_);
-  }
-
-  const char* premature_exit_file_path_;
-};
-
-typedef PrematureExitTest PrematureExitDeathTest;
-
-// Tests that:
-//   - the premature-exit file exists during the execution of a
-//     death test (EXPECT_DEATH*), and
-//   - a death test doesn't interfere with the main test process's
-//     handling of the premature-exit file.
-TEST_F(PrematureExitDeathTest, FileExistsDuringExecutionOfDeathTest) {
-  if (*premature_exit_file_path_ == '\0') {
-    return;
-  }
-
-  EXPECT_DEATH_IF_SUPPORTED({
-      // If the file exists, crash the process such that the main test
-      // process will catch the (expected) crash and report a success;
-      // otherwise don't crash, which will cause the main test process
-      // to report that the death test has failed.
-      if (PrematureExitFileExists()) {
-        exit(1);
-      }
-    }, "");
-}
-
-// Tests that the premature-exit file exists during the execution of a
-// normal (non-death) test.
-TEST_F(PrematureExitTest, PrematureExitFileExistsDuringTestExecution) {
-  if (*premature_exit_file_path_ == '\0') {
-    return;
-  }
-
-  EXPECT_TRUE(PrematureExitFileExists())
-      << " file " << premature_exit_file_path_
-      << " should exist during test execution, but doesn't.";
-}
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-  const int exit_code = RUN_ALL_TESTS();
-
-  // Test that the premature-exit file is deleted upon return from
-  // RUN_ALL_TESTS().
-  const char* const filepath = GetEnv("TEST_PREMATURE_EXIT_FILE");
-  if (filepath != nullptr && *filepath != '\0') {
-    if (PrematureExitTest::FileExists(filepath)) {
-      printf(
-          "File %s shouldn't exist after the test program finishes, but does.",
-          filepath);
-      return 1;
-    }
-  }
-
-  return exit_code;
-}
diff --git a/3rdparty/gtest/test/gtest_prod_test.cc b/3rdparty/gtest/test/gtest_prod_test.cc
deleted file mode 100644
index ede81a0d..00000000
--- a/3rdparty/gtest/test/gtest_prod_test.cc
+++ /dev/null
@@ -1,56 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Unit test for gtest_prod.h.
-
-#include "production.h"
-#include "gtest/gtest.h"
-
-// Tests that private members can be accessed from a TEST declared as
-// a friend of the class.
-TEST(PrivateCodeTest, CanAccessPrivateMembers) {
-  PrivateCode a;
-  EXPECT_EQ(0, a.x_);
-
-  a.set_x(1);
-  EXPECT_EQ(1, a.x_);
-}
-
-typedef testing::Test PrivateCodeFixtureTest;
-
-// Tests that private members can be accessed from a TEST_F declared
-// as a friend of the class.
-TEST_F(PrivateCodeFixtureTest, CanAccessPrivateMembers) {
-  PrivateCode a;
-  EXPECT_EQ(0, a.x_);
-
-  a.set_x(2);
-  EXPECT_EQ(2, a.x_);
-}
diff --git a/3rdparty/gtest/test/gtest_repeat_test.cc b/3rdparty/gtest/test/gtest_repeat_test.cc
deleted file mode 100644
index 7da4a15e..00000000
--- a/3rdparty/gtest/test/gtest_repeat_test.cc
+++ /dev/null
@@ -1,233 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests the --gtest_repeat=number flag.
-
-#include <stdlib.h>
-#include <iostream>
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-
-GTEST_DECLARE_string_(death_test_style);
-GTEST_DECLARE_string_(filter);
-GTEST_DECLARE_int32_(repeat);
-
-}  // namespace testing
-
-using testing::GTEST_FLAG(death_test_style);
-using testing::GTEST_FLAG(filter);
-using testing::GTEST_FLAG(repeat);
-
-namespace {
-
-// We need this when we are testing Google Test itself and therefore
-// cannot use Google Test assertions.
-#define GTEST_CHECK_INT_EQ_(expected, actual) \
-  do {\
-    const int expected_val = (expected);\
-    const int actual_val = (actual);\
-    if (::testing::internal::IsTrue(expected_val != actual_val)) {\
-      ::std::cout << "Value of: " #actual "\n"\
-                  << "  Actual: " << actual_val << "\n"\
-                  << "Expected: " #expected "\n"\
-                  << "Which is: " << expected_val << "\n";\
-      ::testing::internal::posix::Abort();\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-
-// Used for verifying that global environment set-up and tear-down are
-// inside the --gtest_repeat loop.
-
-int g_environment_set_up_count = 0;
-int g_environment_tear_down_count = 0;
-
-class MyEnvironment : public testing::Environment {
- public:
-  MyEnvironment() {}
-  void SetUp() override { g_environment_set_up_count++; }
-  void TearDown() override { g_environment_tear_down_count++; }
-};
-
-// A test that should fail.
-
-int g_should_fail_count = 0;
-
-TEST(FooTest, ShouldFail) {
-  g_should_fail_count++;
-  EXPECT_EQ(0, 1) << "Expected failure.";
-}
-
-// A test that should pass.
-
-int g_should_pass_count = 0;
-
-TEST(FooTest, ShouldPass) {
-  g_should_pass_count++;
-}
-
-// A test that contains a thread-safe death test and a fast death
-// test.  It should pass.
-
-int g_death_test_count = 0;
-
-TEST(BarDeathTest, ThreadSafeAndFast) {
-  g_death_test_count++;
-
-  GTEST_FLAG(death_test_style) = "threadsafe";
-  EXPECT_DEATH_IF_SUPPORTED(::testing::internal::posix::Abort(), "");
-
-  GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_DEATH_IF_SUPPORTED(::testing::internal::posix::Abort(), "");
-}
-
-int g_param_test_count = 0;
-
-const int kNumberOfParamTests = 10;
-
-class MyParamTest : public testing::TestWithParam<int> {};
-
-TEST_P(MyParamTest, ShouldPass) {
-  GTEST_CHECK_INT_EQ_(g_param_test_count % kNumberOfParamTests, GetParam());
-  g_param_test_count++;
-}
-INSTANTIATE_TEST_SUITE_P(MyParamSequence,
-                         MyParamTest,
-                         testing::Range(0, kNumberOfParamTests));
-
-// Resets the count for each test.
-void ResetCounts() {
-  g_environment_set_up_count = 0;
-  g_environment_tear_down_count = 0;
-  g_should_fail_count = 0;
-  g_should_pass_count = 0;
-  g_death_test_count = 0;
-  g_param_test_count = 0;
-}
-
-// Checks that the count for each test is expected.
-void CheckCounts(int expected) {
-  GTEST_CHECK_INT_EQ_(expected, g_environment_set_up_count);
-  GTEST_CHECK_INT_EQ_(expected, g_environment_tear_down_count);
-  GTEST_CHECK_INT_EQ_(expected, g_should_fail_count);
-  GTEST_CHECK_INT_EQ_(expected, g_should_pass_count);
-  GTEST_CHECK_INT_EQ_(expected, g_death_test_count);
-  GTEST_CHECK_INT_EQ_(expected * kNumberOfParamTests, g_param_test_count);
-}
-
-// Tests the behavior of Google Test when --gtest_repeat is not specified.
-void TestRepeatUnspecified() {
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(1, RUN_ALL_TESTS());
-  CheckCounts(1);
-}
-
-// Tests the behavior of Google Test when --gtest_repeat has the given value.
-void TestRepeat(int repeat) {
-  GTEST_FLAG(repeat) = repeat;
-
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(repeat > 0 ? 1 : 0, RUN_ALL_TESTS());
-  CheckCounts(repeat);
-}
-
-// Tests using --gtest_repeat when --gtest_filter specifies an empty
-// set of tests.
-void TestRepeatWithEmptyFilter(int repeat) {
-  GTEST_FLAG(repeat) = repeat;
-  GTEST_FLAG(filter) = "None";
-
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(0, RUN_ALL_TESTS());
-  CheckCounts(0);
-}
-
-// Tests using --gtest_repeat when --gtest_filter specifies a set of
-// successful tests.
-void TestRepeatWithFilterForSuccessfulTests(int repeat) {
-  GTEST_FLAG(repeat) = repeat;
-  GTEST_FLAG(filter) = "*-*ShouldFail";
-
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(0, RUN_ALL_TESTS());
-  GTEST_CHECK_INT_EQ_(repeat, g_environment_set_up_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_environment_tear_down_count);
-  GTEST_CHECK_INT_EQ_(0, g_should_fail_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_should_pass_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_death_test_count);
-  GTEST_CHECK_INT_EQ_(repeat * kNumberOfParamTests, g_param_test_count);
-}
-
-// Tests using --gtest_repeat when --gtest_filter specifies a set of
-// failed tests.
-void TestRepeatWithFilterForFailedTests(int repeat) {
-  GTEST_FLAG(repeat) = repeat;
-  GTEST_FLAG(filter) = "*ShouldFail";
-
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(1, RUN_ALL_TESTS());
-  GTEST_CHECK_INT_EQ_(repeat, g_environment_set_up_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_environment_tear_down_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_should_fail_count);
-  GTEST_CHECK_INT_EQ_(0, g_should_pass_count);
-  GTEST_CHECK_INT_EQ_(0, g_death_test_count);
-  GTEST_CHECK_INT_EQ_(0, g_param_test_count);
-}
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  testing::AddGlobalTestEnvironment(new MyEnvironment);
-
-  TestRepeatUnspecified();
-  TestRepeat(0);
-  TestRepeat(1);
-  TestRepeat(5);
-
-  TestRepeatWithEmptyFilter(2);
-  TestRepeatWithEmptyFilter(3);
-
-  TestRepeatWithFilterForSuccessfulTests(3);
-
-  TestRepeatWithFilterForFailedTests(4);
-
-  // It would be nice to verify that the tests indeed loop forever
-  // when GTEST_FLAG(repeat) is negative, but this test will be quite
-  // complicated to write.  Since this flag is for interactive
-  // debugging only and doesn't affect the normal test result, such a
-  // test would be an overkill.
-
-  printf("PASS\n");
-  return 0;
-}
diff --git a/3rdparty/gtest/test/gtest_skip_environment_check_output_test.py b/3rdparty/gtest/test/gtest_skip_environment_check_output_test.py
deleted file mode 100644
index 6e791556..00000000
--- a/3rdparty/gtest/test/gtest_skip_environment_check_output_test.py
+++ /dev/null
@@ -1,54 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2019 Google LLC.  All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""Tests Google Test's gtest skip in environment setup  behavior.
-
-This script invokes gtest_skip_in_environment_setup_test_ and verifies its
-output.
-"""
-
-import gtest_test_utils
-
-# Path to the gtest_skip_in_environment_setup_test binary
-EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'gtest_skip_in_environment_setup_test')
-
-OUTPUT = gtest_test_utils.Subprocess([EXE_PATH]).output
-
-
-# Test.
-class SkipEntireEnvironmentTest(gtest_test_utils.TestCase):
-
-  def testSkipEntireEnvironmentTest(self):
-    self.assertIn('Skipping the entire environment', OUTPUT)
-    self.assertNotIn('FAILED', OUTPUT)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/gtest_skip_in_environment_setup_test.cc b/3rdparty/gtest/test/gtest_skip_in_environment_setup_test.cc
deleted file mode 100644
index 93723106..00000000
--- a/3rdparty/gtest/test/gtest_skip_in_environment_setup_test.cc
+++ /dev/null
@@ -1,49 +0,0 @@
-// Copyright 2019, Google LLC.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google LLC. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// This test verifies that skipping in the environment results in the
-// testcases being skipped.
-
-#include <iostream>
-#include "gtest/gtest.h"
-
-class SetupEnvironment : public testing::Environment {
- public:
-  void SetUp() override { GTEST_SKIP() << "Skipping the entire environment"; }
-};
-
-TEST(Test, AlwaysFails) { EXPECT_EQ(true, false); }
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  testing::AddGlobalTestEnvironment(new SetupEnvironment());
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/gtest_skip_test.cc b/3rdparty/gtest/test/gtest_skip_test.cc
deleted file mode 100644
index 717e105e..00000000
--- a/3rdparty/gtest/test/gtest_skip_test.cc
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Author: arseny.aprelev@gmail.com (Arseny Aprelev)
-//
-
-#include "gtest/gtest.h"
-
-using ::testing::Test;
-
-TEST(SkipTest, DoesSkip) {
-  GTEST_SKIP();
-  EXPECT_EQ(0, 1);
-}
-
-class Fixture : public Test {
- protected:
-  void SetUp() override {
-    GTEST_SKIP() << "skipping all tests for this fixture";
-  }
-};
-
-TEST_F(Fixture, SkipsOneTest) {
-  EXPECT_EQ(5, 7);
-}
-
-TEST_F(Fixture, SkipsAnotherTest) {
-  EXPECT_EQ(99, 100);
-}
diff --git a/3rdparty/gtest/test/gtest_sole_header_test.cc b/3rdparty/gtest/test/gtest_sole_header_test.cc
deleted file mode 100644
index 1d94ac6b..00000000
--- a/3rdparty/gtest/test/gtest_sole_header_test.cc
+++ /dev/null
@@ -1,56 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// This test verifies that it's possible to use Google Test by including
-// the gtest.h header file alone.
-
-#include "gtest/gtest.h"
-
-namespace {
-
-void Subroutine() {
-  EXPECT_EQ(42, 42);
-}
-
-TEST(NoFatalFailureTest, ExpectNoFatalFailure) {
-  EXPECT_NO_FATAL_FAILURE(;);
-  EXPECT_NO_FATAL_FAILURE(SUCCEED());
-  EXPECT_NO_FATAL_FAILURE(Subroutine());
-  EXPECT_NO_FATAL_FAILURE({ SUCCEED(); });
-}
-
-TEST(NoFatalFailureTest, AssertNoFatalFailure) {
-  ASSERT_NO_FATAL_FAILURE(;);
-  ASSERT_NO_FATAL_FAILURE(SUCCEED());
-  ASSERT_NO_FATAL_FAILURE(Subroutine());
-  ASSERT_NO_FATAL_FAILURE({ SUCCEED(); });
-}
-
-}  // namespace
diff --git a/3rdparty/gtest/test/gtest_stress_test.cc b/3rdparty/gtest/test/gtest_stress_test.cc
deleted file mode 100644
index 84348191..00000000
--- a/3rdparty/gtest/test/gtest_stress_test.cc
+++ /dev/null
@@ -1,248 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests that SCOPED_TRACE() and various Google Test assertions can be
-// used in a large number of threads concurrently.
-
-#include "gtest/gtest.h"
-
-#include <vector>
-
-#include "src/gtest-internal-inl.h"
-
-#if GTEST_IS_THREADSAFE
-
-namespace testing {
-namespace {
-
-using internal::Notification;
-using internal::TestPropertyKeyIs;
-using internal::ThreadWithParam;
-
-// In order to run tests in this file, for platforms where Google Test is
-// thread safe, implement ThreadWithParam. See the description of its API
-// in gtest-port.h, where it is defined for already supported platforms.
-
-// How many threads to create?
-const int kThreadCount = 50;
-
-std::string IdToKey(int id, const char* suffix) {
-  Message key;
-  key << "key_" << id << "_" << suffix;
-  return key.GetString();
-}
-
-std::string IdToString(int id) {
-  Message id_message;
-  id_message << id;
-  return id_message.GetString();
-}
-
-void ExpectKeyAndValueWereRecordedForId(
-    const std::vector<TestProperty>& properties,
-    int id, const char* suffix) {
-  TestPropertyKeyIs matches_key(IdToKey(id, suffix).c_str());
-  const std::vector<TestProperty>::const_iterator property =
-      std::find_if(properties.begin(), properties.end(), matches_key);
-  ASSERT_TRUE(property != properties.end())
-      << "expecting " << suffix << " value for id " << id;
-  EXPECT_STREQ(IdToString(id).c_str(), property->value());
-}
-
-// Calls a large number of Google Test assertions, where exactly one of them
-// will fail.
-void ManyAsserts(int id) {
-  GTEST_LOG_(INFO) << "Thread #" << id << " running...";
-
-  SCOPED_TRACE(Message() << "Thread #" << id);
-
-  for (int i = 0; i < kThreadCount; i++) {
-    SCOPED_TRACE(Message() << "Iteration #" << i);
-
-    // A bunch of assertions that should succeed.
-    EXPECT_TRUE(true);
-    ASSERT_FALSE(false) << "This shouldn't fail.";
-    EXPECT_STREQ("a", "a");
-    ASSERT_LE(5, 6);
-    EXPECT_EQ(i, i) << "This shouldn't fail.";
-
-    // RecordProperty() should interact safely with other threads as well.
-    // The shared_key forces property updates.
-    Test::RecordProperty(IdToKey(id, "string").c_str(), IdToString(id).c_str());
-    Test::RecordProperty(IdToKey(id, "int").c_str(), id);
-    Test::RecordProperty("shared_key", IdToString(id).c_str());
-
-    // This assertion should fail kThreadCount times per thread.  It
-    // is for testing whether Google Test can handle failed assertions in a
-    // multi-threaded context.
-    EXPECT_LT(i, 0) << "This should always fail.";
-  }
-}
-
-void CheckTestFailureCount(int expected_failures) {
-  const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
-  const TestResult* const result = info->result();
-  GTEST_CHECK_(expected_failures == result->total_part_count())
-      << "Logged " << result->total_part_count() << " failures "
-      << " vs. " << expected_failures << " expected";
-}
-
-// Tests using SCOPED_TRACE() and Google Test assertions in many threads
-// concurrently.
-TEST(StressTest, CanUseScopedTraceAndAssertionsInManyThreads) {
-  {
-    std::unique_ptr<ThreadWithParam<int> > threads[kThreadCount];
-    Notification threads_can_start;
-    for (int i = 0; i != kThreadCount; i++)
-      threads[i].reset(new ThreadWithParam<int>(&ManyAsserts,
-                                                i,
-                                                &threads_can_start));
-
-    threads_can_start.Notify();
-
-    // Blocks until all the threads are done.
-    for (int i = 0; i != kThreadCount; i++)
-      threads[i]->Join();
-  }
-
-  // Ensures that kThreadCount*kThreadCount failures have been reported.
-  const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
-  const TestResult* const result = info->result();
-
-  std::vector<TestProperty> properties;
-  // We have no access to the TestResult's list of properties but we can
-  // copy them one by one.
-  for (int i = 0; i < result->test_property_count(); ++i)
-    properties.push_back(result->GetTestProperty(i));
-
-  EXPECT_EQ(kThreadCount * 2 + 1, result->test_property_count())
-      << "String and int values recorded on each thread, "
-      << "as well as one shared_key";
-  for (int i = 0; i < kThreadCount; ++i) {
-    ExpectKeyAndValueWereRecordedForId(properties, i, "string");
-    ExpectKeyAndValueWereRecordedForId(properties, i, "int");
-  }
-  CheckTestFailureCount(kThreadCount*kThreadCount);
-}
-
-void FailingThread(bool is_fatal) {
-  if (is_fatal)
-    FAIL() << "Fatal failure in some other thread. "
-           << "(This failure is expected.)";
-  else
-    ADD_FAILURE() << "Non-fatal failure in some other thread. "
-                  << "(This failure is expected.)";
-}
-
-void GenerateFatalFailureInAnotherThread(bool is_fatal) {
-  ThreadWithParam<bool> thread(&FailingThread, is_fatal, nullptr);
-  thread.Join();
-}
-
-TEST(NoFatalFailureTest, ExpectNoFatalFailureIgnoresFailuresInOtherThreads) {
-  EXPECT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
-  // We should only have one failure (the one from
-  // GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
-  // should succeed.
-  CheckTestFailureCount(1);
-}
-
-void AssertNoFatalFailureIgnoresFailuresInOtherThreads() {
-  ASSERT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
-}
-TEST(NoFatalFailureTest, AssertNoFatalFailureIgnoresFailuresInOtherThreads) {
-  // Using a subroutine, to make sure, that the test continues.
-  AssertNoFatalFailureIgnoresFailuresInOtherThreads();
-  // We should only have one failure (the one from
-  // GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
-  // should succeed.
-  CheckTestFailureCount(1);
-}
-
-TEST(FatalFailureTest, ExpectFatalFailureIgnoresFailuresInOtherThreads) {
-  // This statement should fail, since the current thread doesn't generate a
-  // fatal failure, only another one does.
-  EXPECT_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true), "expected");
-  CheckTestFailureCount(2);
-}
-
-TEST(FatalFailureOnAllThreadsTest, ExpectFatalFailureOnAllThreads) {
-  // This statement should succeed, because failures in all threads are
-  // considered.
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(
-      GenerateFatalFailureInAnotherThread(true), "expected");
-  CheckTestFailureCount(0);
-  // We need to add a failure, because main() checks that there are failures.
-  // But when only this test is run, we shouldn't have any failures.
-  ADD_FAILURE() << "This is an expected non-fatal failure.";
-}
-
-TEST(NonFatalFailureTest, ExpectNonFatalFailureIgnoresFailuresInOtherThreads) {
-  // This statement should fail, since the current thread doesn't generate a
-  // fatal failure, only another one does.
-  EXPECT_NONFATAL_FAILURE(GenerateFatalFailureInAnotherThread(false),
-                          "expected");
-  CheckTestFailureCount(2);
-}
-
-TEST(NonFatalFailureOnAllThreadsTest, ExpectNonFatalFailureOnAllThreads) {
-  // This statement should succeed, because failures in all threads are
-  // considered.
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(
-      GenerateFatalFailureInAnotherThread(false), "expected");
-  CheckTestFailureCount(0);
-  // We need to add a failure, because main() checks that there are failures,
-  // But when only this test is run, we shouldn't have any failures.
-  ADD_FAILURE() << "This is an expected non-fatal failure.";
-}
-
-}  // namespace
-}  // namespace testing
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  const int result = RUN_ALL_TESTS();  // Expected to fail.
-  GTEST_CHECK_(result == 1) << "RUN_ALL_TESTS() did not fail as expected";
-
-  printf("\nPASS\n");
-  return 0;
-}
-
-#else
-TEST(StressTest,
-     DISABLED_ThreadSafetyTestsAreSkippedWhenGoogleTestIsNotThreadSafe) {
-}
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-#endif  // GTEST_IS_THREADSAFE
diff --git a/3rdparty/gtest/test/gtest_test_macro_stack_footprint_test.cc b/3rdparty/gtest/test/gtest_test_macro_stack_footprint_test.cc
deleted file mode 100644
index a48db050..00000000
--- a/3rdparty/gtest/test/gtest_test_macro_stack_footprint_test.cc
+++ /dev/null
@@ -1,89 +0,0 @@
-// Copyright 2013, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Each TEST() expands to some static registration logic.  GCC puts all
-// such static initialization logic for a translation unit in a common,
-// internal function.  Since Google's build system restricts how much
-// stack space a function can use, there's a limit on how many TEST()s
-// one can put in a single C++ test file.  This test ensures that a large
-// number of TEST()s can be defined in the same translation unit.
-
-#include "gtest/gtest.h"
-
-// This macro defines 10 dummy tests.
-#define TEN_TESTS_(test_case_name) \
-  TEST(test_case_name, T0) {} \
-  TEST(test_case_name, T1) {} \
-  TEST(test_case_name, T2) {} \
-  TEST(test_case_name, T3) {} \
-  TEST(test_case_name, T4) {} \
-  TEST(test_case_name, T5) {} \
-  TEST(test_case_name, T6) {} \
-  TEST(test_case_name, T7) {} \
-  TEST(test_case_name, T8) {} \
-  TEST(test_case_name, T9) {}
-
-// This macro defines 100 dummy tests.
-#define HUNDRED_TESTS_(test_case_name_prefix) \
-  TEN_TESTS_(test_case_name_prefix ## 0) \
-  TEN_TESTS_(test_case_name_prefix ## 1) \
-  TEN_TESTS_(test_case_name_prefix ## 2) \
-  TEN_TESTS_(test_case_name_prefix ## 3) \
-  TEN_TESTS_(test_case_name_prefix ## 4) \
-  TEN_TESTS_(test_case_name_prefix ## 5) \
-  TEN_TESTS_(test_case_name_prefix ## 6) \
-  TEN_TESTS_(test_case_name_prefix ## 7) \
-  TEN_TESTS_(test_case_name_prefix ## 8) \
-  TEN_TESTS_(test_case_name_prefix ## 9)
-
-// This macro defines 1000 dummy tests.
-#define THOUSAND_TESTS_(test_case_name_prefix) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 0) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 1) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 2) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 3) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 4) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 5) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 6) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 7) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 8) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 9)
-
-// Ensures that we can define 1000 TEST()s in the same translation
-// unit.
-THOUSAND_TESTS_(T)
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  // We don't actually need to run the dummy tests - the purpose is to
-  // ensure that they compile.
-  return 0;
-}
diff --git a/3rdparty/gtest/test/gtest_test_utils.py b/3rdparty/gtest/test/gtest_test_utils.py
deleted file mode 100644
index ef9363c3..00000000
--- a/3rdparty/gtest/test/gtest_test_utils.py
+++ /dev/null
@@ -1,314 +0,0 @@
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test utilities for Google C++ Testing and Mocking Framework."""
-# Suppresses the 'Import not at the top of the file' lint complaint.
-# pylint: disable-msg=C6204
-
-import os
-import sys
-
-IS_WINDOWS = os.name == 'nt'
-IS_CYGWIN = os.name == 'posix' and 'CYGWIN' in os.uname()[0]
-IS_OS2 = os.name == 'os2'
-
-import atexit
-import shutil
-import tempfile
-import unittest as _test_module
-
-try:
-  import subprocess
-  _SUBPROCESS_MODULE_AVAILABLE = True
-except:
-  import popen2
-  _SUBPROCESS_MODULE_AVAILABLE = False
-# pylint: enable-msg=C6204
-
-GTEST_OUTPUT_VAR_NAME = 'GTEST_OUTPUT'
-
-# The environment variable for specifying the path to the premature-exit file.
-PREMATURE_EXIT_FILE_ENV_VAR = 'TEST_PREMATURE_EXIT_FILE'
-
-environ = os.environ.copy()
-
-
-def SetEnvVar(env_var, value):
-  """Sets/unsets an environment variable to a given value."""
-
-  if value is not None:
-    environ[env_var] = value
-  elif env_var in environ:
-    del environ[env_var]
-
-
-# Here we expose a class from a particular module, depending on the
-# environment. The comment suppresses the 'Invalid variable name' lint
-# complaint.
-TestCase = _test_module.TestCase  # pylint: disable=C6409
-
-# Initially maps a flag to its default value. After
-# _ParseAndStripGTestFlags() is called, maps a flag to its actual value.
-_flag_map = {'source_dir': os.path.dirname(sys.argv[0]),
-             'build_dir': os.path.dirname(sys.argv[0])}
-_gtest_flags_are_parsed = False
-
-
-def _ParseAndStripGTestFlags(argv):
-  """Parses and strips Google Test flags from argv.  This is idempotent."""
-
-  # Suppresses the lint complaint about a global variable since we need it
-  # here to maintain module-wide state.
-  global _gtest_flags_are_parsed  # pylint: disable=W0603
-  if _gtest_flags_are_parsed:
-    return
-
-  _gtest_flags_are_parsed = True
-  for flag in _flag_map:
-    # The environment variable overrides the default value.
-    if flag.upper() in os.environ:
-      _flag_map[flag] = os.environ[flag.upper()]
-
-    # The command line flag overrides the environment variable.
-    i = 1  # Skips the program name.
-    while i < len(argv):
-      prefix = '--' + flag + '='
-      if argv[i].startswith(prefix):
-        _flag_map[flag] = argv[i][len(prefix):]
-        del argv[i]
-        break
-      else:
-        # We don't increment i in case we just found a --gtest_* flag
-        # and removed it from argv.
-        i += 1
-
-
-def GetFlag(flag):
-  """Returns the value of the given flag."""
-
-  # In case GetFlag() is called before Main(), we always call
-  # _ParseAndStripGTestFlags() here to make sure the --gtest_* flags
-  # are parsed.
-  _ParseAndStripGTestFlags(sys.argv)
-
-  return _flag_map[flag]
-
-
-def GetSourceDir():
-  """Returns the absolute path of the directory where the .py files are."""
-
-  return os.path.abspath(GetFlag('source_dir'))
-
-
-def GetBuildDir():
-  """Returns the absolute path of the directory where the test binaries are."""
-
-  return os.path.abspath(GetFlag('build_dir'))
-
-
-_temp_dir = None
-
-def _RemoveTempDir():
-  if _temp_dir:
-    shutil.rmtree(_temp_dir, ignore_errors=True)
-
-atexit.register(_RemoveTempDir)
-
-
-def GetTempDir():
-  global _temp_dir
-  if not _temp_dir:
-    _temp_dir = tempfile.mkdtemp()
-  return _temp_dir
-
-
-def GetTestExecutablePath(executable_name, build_dir=None):
-  """Returns the absolute path of the test binary given its name.
-
-  The function will print a message and abort the program if the resulting file
-  doesn't exist.
-
-  Args:
-    executable_name: name of the test binary that the test script runs.
-    build_dir:       directory where to look for executables, by default
-                     the result of GetBuildDir().
-
-  Returns:
-    The absolute path of the test binary.
-  """
-
-  path = os.path.abspath(os.path.join(build_dir or GetBuildDir(),
-                                      executable_name))
-  if (IS_WINDOWS or IS_CYGWIN or IS_OS2) and not path.endswith('.exe'):
-    path += '.exe'
-
-  if not os.path.exists(path):
-    message = (
-        'Unable to find the test binary "%s". Please make sure to provide\n'
-        'a path to the binary via the --build_dir flag or the BUILD_DIR\n'
-        'environment variable.' % path)
-    print >> sys.stderr, message
-    sys.exit(1)
-
-  return path
-
-
-def GetExitStatus(exit_code):
-  """Returns the argument to exit(), or -1 if exit() wasn't called.
-
-  Args:
-    exit_code: the result value of os.system(command).
-  """
-
-  if os.name == 'nt':
-    # On Windows, os.WEXITSTATUS() doesn't work and os.system() returns
-    # the argument to exit() directly.
-    return exit_code
-  else:
-    # On Unix, os.WEXITSTATUS() must be used to extract the exit status
-    # from the result of os.system().
-    if os.WIFEXITED(exit_code):
-      return os.WEXITSTATUS(exit_code)
-    else:
-      return -1
-
-
-class Subprocess:
-  def __init__(self, command, working_dir=None, capture_stderr=True, env=None):
-    """Changes into a specified directory, if provided, and executes a command.
-
-    Restores the old directory afterwards.
-
-    Args:
-      command:        The command to run, in the form of sys.argv.
-      working_dir:    The directory to change into.
-      capture_stderr: Determines whether to capture stderr in the output member
-                      or to discard it.
-      env:            Dictionary with environment to pass to the subprocess.
-
-    Returns:
-      An object that represents outcome of the executed process. It has the
-      following attributes:
-        terminated_by_signal   True if and only if the child process has been
-                               terminated by a signal.
-        signal                 Sygnal that terminated the child process.
-        exited                 True if and only if the child process exited
-                               normally.
-        exit_code              The code with which the child process exited.
-        output                 Child process's stdout and stderr output
-                               combined in a string.
-    """
-
-    # The subprocess module is the preferrable way of running programs
-    # since it is available and behaves consistently on all platforms,
-    # including Windows. But it is only available starting in python 2.4.
-    # In earlier python versions, we revert to the popen2 module, which is
-    # available in python 2.0 and later but doesn't provide required
-    # functionality (Popen4) under Windows. This allows us to support Mac
-    # OS X 10.4 Tiger, which has python 2.3 installed.
-    if _SUBPROCESS_MODULE_AVAILABLE:
-      if capture_stderr:
-        stderr = subprocess.STDOUT
-      else:
-        stderr = subprocess.PIPE
-
-      p = subprocess.Popen(command,
-                           stdout=subprocess.PIPE, stderr=stderr,
-                           cwd=working_dir, universal_newlines=True, env=env)
-      # communicate returns a tuple with the file object for the child's
-      # output.
-      self.output = p.communicate()[0]
-      self._return_code = p.returncode
-    else:
-      old_dir = os.getcwd()
-
-      def _ReplaceEnvDict(dest, src):
-        # Changes made by os.environ.clear are not inheritable by child
-        # processes until Python 2.6. To produce inheritable changes we have
-        # to delete environment items with the del statement.
-        for key in dest.keys():
-          del dest[key]
-        dest.update(src)
-
-      # When 'env' is not None, backup the environment variables and replace
-      # them with the passed 'env'. When 'env' is None, we simply use the
-      # current 'os.environ' for compatibility with the subprocess.Popen
-      # semantics used above.
-      if env is not None:
-        old_environ = os.environ.copy()
-        _ReplaceEnvDict(os.environ, env)
-
-      try:
-        if working_dir is not None:
-          os.chdir(working_dir)
-        if capture_stderr:
-          p = popen2.Popen4(command)
-        else:
-          p = popen2.Popen3(command)
-        p.tochild.close()
-        self.output = p.fromchild.read()
-        ret_code = p.wait()
-      finally:
-        os.chdir(old_dir)
-
-        # Restore the old environment variables
-        # if they were replaced.
-        if env is not None:
-          _ReplaceEnvDict(os.environ, old_environ)
-
-      # Converts ret_code to match the semantics of
-      # subprocess.Popen.returncode.
-      if os.WIFSIGNALED(ret_code):
-        self._return_code = -os.WTERMSIG(ret_code)
-      else:  # os.WIFEXITED(ret_code) should return True here.
-        self._return_code = os.WEXITSTATUS(ret_code)
-
-    if self._return_code < 0:
-      self.terminated_by_signal = True
-      self.exited = False
-      self.signal = -self._return_code
-    else:
-      self.terminated_by_signal = False
-      self.exited = True
-      self.exit_code = self._return_code
-
-
-def Main():
-  """Runs the unit test."""
-
-  # We must call _ParseAndStripGTestFlags() before calling
-  # unittest.main().  Otherwise the latter will be confused by the
-  # --gtest_* flags.
-  _ParseAndStripGTestFlags(sys.argv)
-  # The tested binaries should not be writing XML output files unless the
-  # script explicitly instructs them to.
-  if GTEST_OUTPUT_VAR_NAME in os.environ:
-    del os.environ[GTEST_OUTPUT_VAR_NAME]
-
-  _test_module.main()
diff --git a/3rdparty/gtest/test/gtest_testbridge_test.py b/3rdparty/gtest/test/gtest_testbridge_test.py
deleted file mode 100644
index 87ffad73..00000000
--- a/3rdparty/gtest/test/gtest_testbridge_test.py
+++ /dev/null
@@ -1,63 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2018 Google LLC. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""Verifies that Google Test uses filter provided via testbridge."""
-
-import os
-
-import gtest_test_utils
-
-binary_name = 'gtest_testbridge_test_'
-COMMAND = gtest_test_utils.GetTestExecutablePath(binary_name)
-TESTBRIDGE_NAME = 'TESTBRIDGE_TEST_ONLY'
-
-
-def Assert(condition):
-  if not condition:
-    raise AssertionError
-
-
-class GTestTestFilterTest(gtest_test_utils.TestCase):
-
-  def testTestExecutionIsFiltered(self):
-    """Tests that the test filter is picked up from the testbridge env var."""
-    subprocess_env = os.environ.copy()
-
-    subprocess_env[TESTBRIDGE_NAME] = '*.TestThatSucceeds'
-    p = gtest_test_utils.Subprocess(COMMAND, env=subprocess_env)
-
-    self.assertEquals(0, p.exit_code)
-
-    Assert('filter = *.TestThatSucceeds' in p.output)
-    Assert('[       OK ] TestFilterTest.TestThatSucceeds' in p.output)
-    Assert('[  PASSED  ] 1 test.' in p.output)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/gtest_testbridge_test_.cc b/3rdparty/gtest/test/gtest_testbridge_test_.cc
deleted file mode 100644
index 24617b20..00000000
--- a/3rdparty/gtest/test/gtest_testbridge_test_.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2018, Google LLC.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This program is meant to be run by gtest_test_filter_test.py.  Do not run
-// it directly.
-
-#include "gtest/gtest.h"
-
-// These tests are used to detect if filtering is working. Only
-// 'TestThatSucceeds' should ever run.
-
-TEST(TestFilterTest, TestThatSucceeds) {}
-
-TEST(TestFilterTest, TestThatFails) {
-  ASSERT_TRUE(false) << "This test should never be run.";
-}
diff --git a/3rdparty/gtest/test/gtest_throw_on_failure_ex_test.cc b/3rdparty/gtest/test/gtest_throw_on_failure_ex_test.cc
deleted file mode 100644
index 1d95adbf..00000000
--- a/3rdparty/gtest/test/gtest_throw_on_failure_ex_test.cc
+++ /dev/null
@@ -1,90 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests Google Test's throw-on-failure mode with exceptions enabled.
-
-#include "gtest/gtest.h"
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdexcept>
-
-// Prints the given failure message and exits the program with
-// non-zero.  We use this instead of a Google Test assertion to
-// indicate a failure, as the latter is been tested and cannot be
-// relied on.
-void Fail(const char* msg) {
-  printf("FAILURE: %s\n", msg);
-  fflush(stdout);
-  exit(1);
-}
-
-// Tests that an assertion failure throws a subclass of
-// std::runtime_error.
-void TestFailureThrowsRuntimeError() {
-  testing::GTEST_FLAG(throw_on_failure) = true;
-
-  // A successful assertion shouldn't throw.
-  try {
-    EXPECT_EQ(3, 3);
-  } catch(...) {
-    Fail("A successful assertion wrongfully threw.");
-  }
-
-  // A failed assertion should throw a subclass of std::runtime_error.
-  try {
-    EXPECT_EQ(2, 3) << "Expected failure";
-  } catch(const std::runtime_error& e) {
-    if (strstr(e.what(), "Expected failure") != nullptr) return;
-
-    printf("%s",
-           "A failed assertion did throw an exception of the right type, "
-           "but the message is incorrect.  Instead of containing \"Expected "
-           "failure\", it is:\n");
-    Fail(e.what());
-  } catch(...) {
-    Fail("A failed assertion threw the wrong type of exception.");
-  }
-  Fail("A failed assertion should've thrown but didn't.");
-}
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  // We want to ensure that people can use Google Test assertions in
-  // other testing frameworks, as long as they initialize Google Test
-  // properly and set the thrown-on-failure mode.  Therefore, we don't
-  // use Google Test's constructs for defining and running tests
-  // (e.g. TEST and RUN_ALL_TESTS) here.
-
-  TestFailureThrowsRuntimeError();
-  return 0;
-}
diff --git a/3rdparty/gtest/test/gtest_unittest.cc b/3rdparty/gtest/test/gtest_unittest.cc
deleted file mode 100644
index 39749b7b..00000000
--- a/3rdparty/gtest/test/gtest_unittest.cc
+++ /dev/null
@@ -1,7488 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself.  This verifies that the basic constructs of
-// Google Test work.
-
-#include "gtest/gtest.h"
-
-// Verifies that the command line flag variables can be accessed in
-// code once "gtest.h" has been #included.
-// Do not move it after other gtest #includes.
-TEST(CommandLineFlagsTest, CanBeAccessedInCodeOnceGTestHIsIncluded) {
-  bool dummy = testing::GTEST_FLAG(also_run_disabled_tests)
-      || testing::GTEST_FLAG(break_on_failure)
-      || testing::GTEST_FLAG(catch_exceptions)
-      || testing::GTEST_FLAG(color) != "unknown"
-      || testing::GTEST_FLAG(filter) != "unknown"
-      || testing::GTEST_FLAG(list_tests)
-      || testing::GTEST_FLAG(output) != "unknown"
-      || testing::GTEST_FLAG(print_time)
-      || testing::GTEST_FLAG(random_seed)
-      || testing::GTEST_FLAG(repeat) > 0
-      || testing::GTEST_FLAG(show_internal_stack_frames)
-      || testing::GTEST_FLAG(shuffle)
-      || testing::GTEST_FLAG(stack_trace_depth) > 0
-      || testing::GTEST_FLAG(stream_result_to) != "unknown"
-      || testing::GTEST_FLAG(throw_on_failure);
-  EXPECT_TRUE(dummy || !dummy);  // Suppresses warning that dummy is unused.
-}
-
-#include <limits.h>  // For INT_MAX.
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#include <map>
-#include <ostream>
-#include <type_traits>
-#include <unordered_set>
-#include <vector>
-
-#include "gtest/gtest-spi.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-namespace internal {
-
-#if GTEST_CAN_STREAM_RESULTS_
-
-class StreamingListenerTest : public Test {
- public:
-  class FakeSocketWriter : public StreamingListener::AbstractSocketWriter {
-   public:
-    // Sends a string to the socket.
-    void Send(const std::string& message) override { output_ += message; }
-
-    std::string output_;
-  };
-
-  StreamingListenerTest()
-      : fake_sock_writer_(new FakeSocketWriter),
-        streamer_(fake_sock_writer_),
-        test_info_obj_("FooTest", "Bar", nullptr, nullptr,
-                       CodeLocation(__FILE__, __LINE__), nullptr, nullptr) {}
-
- protected:
-  std::string* output() { return &(fake_sock_writer_->output_); }
-
-  FakeSocketWriter* const fake_sock_writer_;
-  StreamingListener streamer_;
-  UnitTest unit_test_;
-  TestInfo test_info_obj_;  // The name test_info_ was taken by testing::Test.
-};
-
-TEST_F(StreamingListenerTest, OnTestProgramEnd) {
-  *output() = "";
-  streamer_.OnTestProgramEnd(unit_test_);
-  EXPECT_EQ("event=TestProgramEnd&passed=1\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestIterationEnd) {
-  *output() = "";
-  streamer_.OnTestIterationEnd(unit_test_, 42);
-  EXPECT_EQ("event=TestIterationEnd&passed=1&elapsed_time=0ms\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestCaseStart) {
-  *output() = "";
-  streamer_.OnTestCaseStart(TestCase("FooTest", "Bar", nullptr, nullptr));
-  EXPECT_EQ("event=TestCaseStart&name=FooTest\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestCaseEnd) {
-  *output() = "";
-  streamer_.OnTestCaseEnd(TestCase("FooTest", "Bar", nullptr, nullptr));
-  EXPECT_EQ("event=TestCaseEnd&passed=1&elapsed_time=0ms\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestStart) {
-  *output() = "";
-  streamer_.OnTestStart(test_info_obj_);
-  EXPECT_EQ("event=TestStart&name=Bar\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestEnd) {
-  *output() = "";
-  streamer_.OnTestEnd(test_info_obj_);
-  EXPECT_EQ("event=TestEnd&passed=1&elapsed_time=0ms\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestPartResult) {
-  *output() = "";
-  streamer_.OnTestPartResult(TestPartResult(
-      TestPartResult::kFatalFailure, "foo.cc", 42, "failed=\n&%"));
-
-  // Meta characters in the failure message should be properly escaped.
-  EXPECT_EQ(
-      "event=TestPartResult&file=foo.cc&line=42&message=failed%3D%0A%26%25\n",
-      *output());
-}
-
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-// Provides access to otherwise private parts of the TestEventListeners class
-// that are needed to test it.
-class TestEventListenersAccessor {
- public:
-  static TestEventListener* GetRepeater(TestEventListeners* listeners) {
-    return listeners->repeater();
-  }
-
-  static void SetDefaultResultPrinter(TestEventListeners* listeners,
-                                      TestEventListener* listener) {
-    listeners->SetDefaultResultPrinter(listener);
-  }
-  static void SetDefaultXmlGenerator(TestEventListeners* listeners,
-                                     TestEventListener* listener) {
-    listeners->SetDefaultXmlGenerator(listener);
-  }
-
-  static bool EventForwardingEnabled(const TestEventListeners& listeners) {
-    return listeners.EventForwardingEnabled();
-  }
-
-  static void SuppressEventForwarding(TestEventListeners* listeners) {
-    listeners->SuppressEventForwarding();
-  }
-};
-
-class UnitTestRecordPropertyTestHelper : public Test {
- protected:
-  UnitTestRecordPropertyTestHelper() {}
-
-  // Forwards to UnitTest::RecordProperty() to bypass access controls.
-  void UnitTestRecordProperty(const char* key, const std::string& value) {
-    unit_test_.RecordProperty(key, value);
-  }
-
-  UnitTest unit_test_;
-};
-
-}  // namespace internal
-}  // namespace testing
-
-using testing::AssertionFailure;
-using testing::AssertionResult;
-using testing::AssertionSuccess;
-using testing::DoubleLE;
-using testing::EmptyTestEventListener;
-using testing::Environment;
-using testing::FloatLE;
-using testing::GTEST_FLAG(also_run_disabled_tests);
-using testing::GTEST_FLAG(break_on_failure);
-using testing::GTEST_FLAG(catch_exceptions);
-using testing::GTEST_FLAG(color);
-using testing::GTEST_FLAG(death_test_use_fork);
-using testing::GTEST_FLAG(filter);
-using testing::GTEST_FLAG(list_tests);
-using testing::GTEST_FLAG(output);
-using testing::GTEST_FLAG(print_time);
-using testing::GTEST_FLAG(random_seed);
-using testing::GTEST_FLAG(repeat);
-using testing::GTEST_FLAG(show_internal_stack_frames);
-using testing::GTEST_FLAG(shuffle);
-using testing::GTEST_FLAG(stack_trace_depth);
-using testing::GTEST_FLAG(stream_result_to);
-using testing::GTEST_FLAG(throw_on_failure);
-using testing::IsNotSubstring;
-using testing::IsSubstring;
-using testing::Message;
-using testing::ScopedFakeTestPartResultReporter;
-using testing::StaticAssertTypeEq;
-using testing::Test;
-using testing::TestCase;
-using testing::TestEventListeners;
-using testing::TestInfo;
-using testing::TestPartResult;
-using testing::TestPartResultArray;
-using testing::TestProperty;
-using testing::TestResult;
-using testing::TimeInMillis;
-using testing::UnitTest;
-using testing::internal::AlwaysFalse;
-using testing::internal::AlwaysTrue;
-using testing::internal::AppendUserMessage;
-using testing::internal::ArrayAwareFind;
-using testing::internal::ArrayEq;
-using testing::internal::CodePointToUtf8;
-using testing::internal::CopyArray;
-using testing::internal::CountIf;
-using testing::internal::EqFailure;
-using testing::internal::FloatingPoint;
-using testing::internal::ForEach;
-using testing::internal::FormatEpochTimeInMillisAsIso8601;
-using testing::internal::FormatTimeInMillisAsSeconds;
-using testing::internal::GTestFlagSaver;
-using testing::internal::GetCurrentOsStackTraceExceptTop;
-using testing::internal::GetElementOr;
-using testing::internal::GetNextRandomSeed;
-using testing::internal::GetRandomSeedFromFlag;
-using testing::internal::GetTestTypeId;
-using testing::internal::GetTimeInMillis;
-using testing::internal::GetTypeId;
-using testing::internal::GetUnitTestImpl;
-using testing::internal::Int32;
-using testing::internal::Int32FromEnvOrDie;
-using testing::internal::IsAProtocolMessage;
-using testing::internal::IsContainer;
-using testing::internal::IsContainerTest;
-using testing::internal::IsNotContainer;
-using testing::internal::NativeArray;
-using testing::internal::OsStackTraceGetter;
-using testing::internal::OsStackTraceGetterInterface;
-using testing::internal::ParseInt32Flag;
-using testing::internal::RelationToSourceCopy;
-using testing::internal::RelationToSourceReference;
-using testing::internal::ShouldRunTestOnShard;
-using testing::internal::ShouldShard;
-using testing::internal::ShouldUseColor;
-using testing::internal::Shuffle;
-using testing::internal::ShuffleRange;
-using testing::internal::SkipPrefix;
-using testing::internal::StreamableToString;
-using testing::internal::String;
-using testing::internal::TestEventListenersAccessor;
-using testing::internal::TestResultAccessor;
-using testing::internal::UInt32;
-using testing::internal::UnitTestImpl;
-using testing::internal::WideStringToUtf8;
-using testing::internal::edit_distance::CalculateOptimalEdits;
-using testing::internal::edit_distance::CreateUnifiedDiff;
-using testing::internal::edit_distance::EditType;
-using testing::internal::kMaxRandomSeed;
-using testing::internal::kTestTypeIdInGoogleTest;
-using testing::kMaxStackTraceDepth;
-
-#if GTEST_HAS_STREAM_REDIRECTION
-using testing::internal::CaptureStdout;
-using testing::internal::GetCapturedStdout;
-#endif
-
-#if GTEST_IS_THREADSAFE
-using testing::internal::ThreadWithParam;
-#endif
-
-class TestingVector : public std::vector<int> {
-};
-
-::std::ostream& operator<<(::std::ostream& os,
-                           const TestingVector& vector) {
-  os << "{ ";
-  for (size_t i = 0; i < vector.size(); i++) {
-    os << vector[i] << " ";
-  }
-  os << "}";
-  return os;
-}
-
-// This line tests that we can define tests in an unnamed namespace.
-namespace {
-
-TEST(GetRandomSeedFromFlagTest, HandlesZero) {
-  const int seed = GetRandomSeedFromFlag(0);
-  EXPECT_LE(1, seed);
-  EXPECT_LE(seed, static_cast<int>(kMaxRandomSeed));
-}
-
-TEST(GetRandomSeedFromFlagTest, PreservesValidSeed) {
-  EXPECT_EQ(1, GetRandomSeedFromFlag(1));
-  EXPECT_EQ(2, GetRandomSeedFromFlag(2));
-  EXPECT_EQ(kMaxRandomSeed - 1, GetRandomSeedFromFlag(kMaxRandomSeed - 1));
-  EXPECT_EQ(static_cast<int>(kMaxRandomSeed),
-            GetRandomSeedFromFlag(kMaxRandomSeed));
-}
-
-TEST(GetRandomSeedFromFlagTest, NormalizesInvalidSeed) {
-  const int seed1 = GetRandomSeedFromFlag(-1);
-  EXPECT_LE(1, seed1);
-  EXPECT_LE(seed1, static_cast<int>(kMaxRandomSeed));
-
-  const int seed2 = GetRandomSeedFromFlag(kMaxRandomSeed + 1);
-  EXPECT_LE(1, seed2);
-  EXPECT_LE(seed2, static_cast<int>(kMaxRandomSeed));
-}
-
-TEST(GetNextRandomSeedTest, WorksForValidInput) {
-  EXPECT_EQ(2, GetNextRandomSeed(1));
-  EXPECT_EQ(3, GetNextRandomSeed(2));
-  EXPECT_EQ(static_cast<int>(kMaxRandomSeed),
-            GetNextRandomSeed(kMaxRandomSeed - 1));
-  EXPECT_EQ(1, GetNextRandomSeed(kMaxRandomSeed));
-
-  // We deliberately don't test GetNextRandomSeed() with invalid
-  // inputs, as that requires death tests, which are expensive.  This
-  // is fine as GetNextRandomSeed() is internal and has a
-  // straightforward definition.
-}
-
-static void ClearCurrentTestPartResults() {
-  TestResultAccessor::ClearTestPartResults(
-      GetUnitTestImpl()->current_test_result());
-}
-
-// Tests GetTypeId.
-
-TEST(GetTypeIdTest, ReturnsSameValueForSameType) {
-  EXPECT_EQ(GetTypeId<int>(), GetTypeId<int>());
-  EXPECT_EQ(GetTypeId<Test>(), GetTypeId<Test>());
-}
-
-class SubClassOfTest : public Test {};
-class AnotherSubClassOfTest : public Test {};
-
-TEST(GetTypeIdTest, ReturnsDifferentValuesForDifferentTypes) {
-  EXPECT_NE(GetTypeId<int>(), GetTypeId<const int>());
-  EXPECT_NE(GetTypeId<int>(), GetTypeId<char>());
-  EXPECT_NE(GetTypeId<int>(), GetTestTypeId());
-  EXPECT_NE(GetTypeId<SubClassOfTest>(), GetTestTypeId());
-  EXPECT_NE(GetTypeId<AnotherSubClassOfTest>(), GetTestTypeId());
-  EXPECT_NE(GetTypeId<AnotherSubClassOfTest>(), GetTypeId<SubClassOfTest>());
-}
-
-// Verifies that GetTestTypeId() returns the same value, no matter it
-// is called from inside Google Test or outside of it.
-TEST(GetTestTypeIdTest, ReturnsTheSameValueInsideOrOutsideOfGoogleTest) {
-  EXPECT_EQ(kTestTypeIdInGoogleTest, GetTestTypeId());
-}
-
-// Tests CanonicalizeForStdLibVersioning.
-
-using ::testing::internal::CanonicalizeForStdLibVersioning;
-
-TEST(CanonicalizeForStdLibVersioning, LeavesUnversionedNamesUnchanged) {
-  EXPECT_EQ("std::bind", CanonicalizeForStdLibVersioning("std::bind"));
-  EXPECT_EQ("std::_", CanonicalizeForStdLibVersioning("std::_"));
-  EXPECT_EQ("std::__foo", CanonicalizeForStdLibVersioning("std::__foo"));
-  EXPECT_EQ("gtl::__1::x", CanonicalizeForStdLibVersioning("gtl::__1::x"));
-  EXPECT_EQ("__1::x", CanonicalizeForStdLibVersioning("__1::x"));
-  EXPECT_EQ("::__1::x", CanonicalizeForStdLibVersioning("::__1::x"));
-}
-
-TEST(CanonicalizeForStdLibVersioning, ElidesDoubleUnderNames) {
-  EXPECT_EQ("std::bind", CanonicalizeForStdLibVersioning("std::__1::bind"));
-  EXPECT_EQ("std::_", CanonicalizeForStdLibVersioning("std::__1::_"));
-
-  EXPECT_EQ("std::bind", CanonicalizeForStdLibVersioning("std::__g::bind"));
-  EXPECT_EQ("std::_", CanonicalizeForStdLibVersioning("std::__g::_"));
-
-  EXPECT_EQ("std::bind",
-            CanonicalizeForStdLibVersioning("std::__google::bind"));
-  EXPECT_EQ("std::_", CanonicalizeForStdLibVersioning("std::__google::_"));
-}
-
-// Tests FormatTimeInMillisAsSeconds().
-
-TEST(FormatTimeInMillisAsSecondsTest, FormatsZero) {
-  EXPECT_EQ("0", FormatTimeInMillisAsSeconds(0));
-}
-
-TEST(FormatTimeInMillisAsSecondsTest, FormatsPositiveNumber) {
-  EXPECT_EQ("0.003", FormatTimeInMillisAsSeconds(3));
-  EXPECT_EQ("0.01", FormatTimeInMillisAsSeconds(10));
-  EXPECT_EQ("0.2", FormatTimeInMillisAsSeconds(200));
-  EXPECT_EQ("1.2", FormatTimeInMillisAsSeconds(1200));
-  EXPECT_EQ("3", FormatTimeInMillisAsSeconds(3000));
-}
-
-TEST(FormatTimeInMillisAsSecondsTest, FormatsNegativeNumber) {
-  EXPECT_EQ("-0.003", FormatTimeInMillisAsSeconds(-3));
-  EXPECT_EQ("-0.01", FormatTimeInMillisAsSeconds(-10));
-  EXPECT_EQ("-0.2", FormatTimeInMillisAsSeconds(-200));
-  EXPECT_EQ("-1.2", FormatTimeInMillisAsSeconds(-1200));
-  EXPECT_EQ("-3", FormatTimeInMillisAsSeconds(-3000));
-}
-
-// Tests FormatEpochTimeInMillisAsIso8601().  The correctness of conversion
-// for particular dates below was verified in Python using
-// datetime.datetime.fromutctimestamp(<timetamp>/1000).
-
-// FormatEpochTimeInMillisAsIso8601 depends on the current timezone, so we
-// have to set up a particular timezone to obtain predictable results.
-class FormatEpochTimeInMillisAsIso8601Test : public Test {
- public:
-  // On Cygwin, GCC doesn't allow unqualified integer literals to exceed
-  // 32 bits, even when 64-bit integer types are available.  We have to
-  // force the constants to have a 64-bit type here.
-  static const TimeInMillis kMillisPerSec = 1000;
-
- private:
-  void SetUp() override {
-    saved_tz_ = nullptr;
-
-    GTEST_DISABLE_MSC_DEPRECATED_PUSH_(/* getenv, strdup: deprecated */)
-    if (getenv("TZ"))
-      saved_tz_ = strdup(getenv("TZ"));
-    GTEST_DISABLE_MSC_DEPRECATED_POP_()
-
-    // Set up the time zone for FormatEpochTimeInMillisAsIso8601 to use.  We
-    // cannot use the local time zone because the function's output depends
-    // on the time zone.
-    SetTimeZone("UTC+00");
-  }
-
-  void TearDown() override {
-    SetTimeZone(saved_tz_);
-    free(const_cast<char*>(saved_tz_));
-    saved_tz_ = nullptr;
-  }
-
-  static void SetTimeZone(const char* time_zone) {
-    // tzset() distinguishes between the TZ variable being present and empty
-    // and not being present, so we have to consider the case of time_zone
-    // being NULL.
-#if _MSC_VER || GTEST_OS_WINDOWS_MINGW
-    // ...Unless it's MSVC, whose standard library's _putenv doesn't
-    // distinguish between an empty and a missing variable.
-    const std::string env_var =
-        std::string("TZ=") + (time_zone ? time_zone : "");
-    _putenv(env_var.c_str());
-    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4996 /* deprecated function */)
-    tzset();
-    GTEST_DISABLE_MSC_WARNINGS_POP_()
-#else
-    if (time_zone) {
-      setenv(("TZ"), time_zone, 1);
-    } else {
-      unsetenv("TZ");
-    }
-    tzset();
-#endif
-  }
-
-  const char* saved_tz_;
-};
-
-const TimeInMillis FormatEpochTimeInMillisAsIso8601Test::kMillisPerSec;
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, PrintsTwoDigitSegments) {
-  EXPECT_EQ("2011-10-31T18:52:42",
-            FormatEpochTimeInMillisAsIso8601(1320087162 * kMillisPerSec));
-}
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, MillisecondsDoNotAffectResult) {
-  EXPECT_EQ(
-      "2011-10-31T18:52:42",
-      FormatEpochTimeInMillisAsIso8601(1320087162 * kMillisPerSec + 234));
-}
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, PrintsLeadingZeroes) {
-  EXPECT_EQ("2011-09-03T05:07:02",
-            FormatEpochTimeInMillisAsIso8601(1315026422 * kMillisPerSec));
-}
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, Prints24HourTime) {
-  EXPECT_EQ("2011-09-28T17:08:22",
-            FormatEpochTimeInMillisAsIso8601(1317229702 * kMillisPerSec));
-}
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, PrintsEpochStart) {
-  EXPECT_EQ("1970-01-01T00:00:00", FormatEpochTimeInMillisAsIso8601(0));
-}
-
-# ifdef __BORLANDC__
-// Silences warnings: "Condition is always true", "Unreachable code"
-#  pragma option push -w-ccc -w-rch
-# endif
-
-// Tests that the LHS of EXPECT_EQ or ASSERT_EQ can be used as a null literal
-// when the RHS is a pointer type.
-TEST(NullLiteralTest, LHSAllowsNullLiterals) {
-  EXPECT_EQ(0, static_cast<void*>(nullptr));     // NOLINT
-  ASSERT_EQ(0, static_cast<void*>(nullptr));     // NOLINT
-  EXPECT_EQ(NULL, static_cast<void*>(nullptr));  // NOLINT
-  ASSERT_EQ(NULL, static_cast<void*>(nullptr));  // NOLINT
-  EXPECT_EQ(nullptr, static_cast<void*>(nullptr));
-  ASSERT_EQ(nullptr, static_cast<void*>(nullptr));
-
-  const int* const p = nullptr;
-  EXPECT_EQ(0, p);     // NOLINT
-  ASSERT_EQ(0, p);     // NOLINT
-  EXPECT_EQ(NULL, p);  // NOLINT
-  ASSERT_EQ(NULL, p);  // NOLINT
-  EXPECT_EQ(nullptr, p);
-  ASSERT_EQ(nullptr, p);
-}
-
-struct ConvertToAll {
-  template <typename T>
-  operator T() const {  // NOLINT
-    return T();
-  }
-};
-
-struct ConvertToPointer {
-  template <class T>
-  operator T*() const {  // NOLINT
-    return nullptr;
-  }
-};
-
-struct ConvertToAllButNoPointers {
-  template <typename T,
-            typename std::enable_if<!std::is_pointer<T>::value, int>::type = 0>
-  operator T() const {  // NOLINT
-    return T();
-  }
-};
-
-struct MyType {};
-inline bool operator==(MyType const&, MyType const&) { return true; }
-
-TEST(NullLiteralTest, ImplicitConversion) {
-  EXPECT_EQ(ConvertToPointer{}, static_cast<void*>(nullptr));
-#if !defined(__GNUC__) || defined(__clang__)
-  // Disabled due to GCC bug gcc.gnu.org/PR89580
-  EXPECT_EQ(ConvertToAll{}, static_cast<void*>(nullptr));
-#endif
-  EXPECT_EQ(ConvertToAll{}, MyType{});
-  EXPECT_EQ(ConvertToAllButNoPointers{}, MyType{});
-}
-
-#ifdef __clang__
-#pragma clang diagnostic push
-#if __has_warning("-Wzero-as-null-pointer-constant")
-#pragma clang diagnostic error "-Wzero-as-null-pointer-constant"
-#endif
-#endif
-
-TEST(NullLiteralTest, NoConversionNoWarning) {
-  // Test that gtests detection and handling of null pointer constants
-  // doesn't trigger a warning when '0' isn't actually used as null.
-  EXPECT_EQ(0, 0);
-  ASSERT_EQ(0, 0);
-}
-
-#ifdef __clang__
-#pragma clang diagnostic pop
-#endif
-
-# ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them.
-#  pragma option pop
-# endif
-
-//
-// Tests CodePointToUtf8().
-
-// Tests that the NUL character L'\0' is encoded correctly.
-TEST(CodePointToUtf8Test, CanEncodeNul) {
-  EXPECT_EQ("", CodePointToUtf8(L'\0'));
-}
-
-// Tests that ASCII characters are encoded correctly.
-TEST(CodePointToUtf8Test, CanEncodeAscii) {
-  EXPECT_EQ("a", CodePointToUtf8(L'a'));
-  EXPECT_EQ("Z", CodePointToUtf8(L'Z'));
-  EXPECT_EQ("&", CodePointToUtf8(L'&'));
-  EXPECT_EQ("\x7F", CodePointToUtf8(L'\x7F'));
-}
-
-// Tests that Unicode code-points that have 8 to 11 bits are encoded
-// as 110xxxxx 10xxxxxx.
-TEST(CodePointToUtf8Test, CanEncode8To11Bits) {
-  // 000 1101 0011 => 110-00011 10-010011
-  EXPECT_EQ("\xC3\x93", CodePointToUtf8(L'\xD3'));
-
-  // 101 0111 0110 => 110-10101 10-110110
-  // Some compilers (e.g., GCC on MinGW) cannot handle non-ASCII codepoints
-  // in wide strings and wide chars. In order to accommodate them, we have to
-  // introduce such character constants as integers.
-  EXPECT_EQ("\xD5\xB6",
-            CodePointToUtf8(static_cast<wchar_t>(0x576)));
-}
-
-// Tests that Unicode code-points that have 12 to 16 bits are encoded
-// as 1110xxxx 10xxxxxx 10xxxxxx.
-TEST(CodePointToUtf8Test, CanEncode12To16Bits) {
-  // 0000 1000 1101 0011 => 1110-0000 10-100011 10-010011
-  EXPECT_EQ("\xE0\xA3\x93",
-            CodePointToUtf8(static_cast<wchar_t>(0x8D3)));
-
-  // 1100 0111 0100 1101 => 1110-1100 10-011101 10-001101
-  EXPECT_EQ("\xEC\x9D\x8D",
-            CodePointToUtf8(static_cast<wchar_t>(0xC74D)));
-}
-
-#if !GTEST_WIDE_STRING_USES_UTF16_
-// Tests in this group require a wchar_t to hold > 16 bits, and thus
-// are skipped on Windows, and Cygwin, where a wchar_t is
-// 16-bit wide. This code may not compile on those systems.
-
-// Tests that Unicode code-points that have 17 to 21 bits are encoded
-// as 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx.
-TEST(CodePointToUtf8Test, CanEncode17To21Bits) {
-  // 0 0001 0000 1000 1101 0011 => 11110-000 10-010000 10-100011 10-010011
-  EXPECT_EQ("\xF0\x90\xA3\x93", CodePointToUtf8(L'\x108D3'));
-
-  // 0 0001 0000 0100 0000 0000 => 11110-000 10-010000 10-010000 10-000000
-  EXPECT_EQ("\xF0\x90\x90\x80", CodePointToUtf8(L'\x10400'));
-
-  // 1 0000 1000 0110 0011 0100 => 11110-100 10-001000 10-011000 10-110100
-  EXPECT_EQ("\xF4\x88\x98\xB4", CodePointToUtf8(L'\x108634'));
-}
-
-// Tests that encoding an invalid code-point generates the expected result.
-TEST(CodePointToUtf8Test, CanEncodeInvalidCodePoint) {
-  EXPECT_EQ("(Invalid Unicode 0x1234ABCD)", CodePointToUtf8(L'\x1234ABCD'));
-}
-
-#endif  // !GTEST_WIDE_STRING_USES_UTF16_
-
-// Tests WideStringToUtf8().
-
-// Tests that the NUL character L'\0' is encoded correctly.
-TEST(WideStringToUtf8Test, CanEncodeNul) {
-  EXPECT_STREQ("", WideStringToUtf8(L"", 0).c_str());
-  EXPECT_STREQ("", WideStringToUtf8(L"", -1).c_str());
-}
-
-// Tests that ASCII strings are encoded correctly.
-TEST(WideStringToUtf8Test, CanEncodeAscii) {
-  EXPECT_STREQ("a", WideStringToUtf8(L"a", 1).c_str());
-  EXPECT_STREQ("ab", WideStringToUtf8(L"ab", 2).c_str());
-  EXPECT_STREQ("a", WideStringToUtf8(L"a", -1).c_str());
-  EXPECT_STREQ("ab", WideStringToUtf8(L"ab", -1).c_str());
-}
-
-// Tests that Unicode code-points that have 8 to 11 bits are encoded
-// as 110xxxxx 10xxxxxx.
-TEST(WideStringToUtf8Test, CanEncode8To11Bits) {
-  // 000 1101 0011 => 110-00011 10-010011
-  EXPECT_STREQ("\xC3\x93", WideStringToUtf8(L"\xD3", 1).c_str());
-  EXPECT_STREQ("\xC3\x93", WideStringToUtf8(L"\xD3", -1).c_str());
-
-  // 101 0111 0110 => 110-10101 10-110110
-  const wchar_t s[] = { 0x576, '\0' };
-  EXPECT_STREQ("\xD5\xB6", WideStringToUtf8(s, 1).c_str());
-  EXPECT_STREQ("\xD5\xB6", WideStringToUtf8(s, -1).c_str());
-}
-
-// Tests that Unicode code-points that have 12 to 16 bits are encoded
-// as 1110xxxx 10xxxxxx 10xxxxxx.
-TEST(WideStringToUtf8Test, CanEncode12To16Bits) {
-  // 0000 1000 1101 0011 => 1110-0000 10-100011 10-010011
-  const wchar_t s1[] = { 0x8D3, '\0' };
-  EXPECT_STREQ("\xE0\xA3\x93", WideStringToUtf8(s1, 1).c_str());
-  EXPECT_STREQ("\xE0\xA3\x93", WideStringToUtf8(s1, -1).c_str());
-
-  // 1100 0111 0100 1101 => 1110-1100 10-011101 10-001101
-  const wchar_t s2[] = { 0xC74D, '\0' };
-  EXPECT_STREQ("\xEC\x9D\x8D", WideStringToUtf8(s2, 1).c_str());
-  EXPECT_STREQ("\xEC\x9D\x8D", WideStringToUtf8(s2, -1).c_str());
-}
-
-// Tests that the conversion stops when the function encounters \0 character.
-TEST(WideStringToUtf8Test, StopsOnNulCharacter) {
-  EXPECT_STREQ("ABC", WideStringToUtf8(L"ABC\0XYZ", 100).c_str());
-}
-
-// Tests that the conversion stops when the function reaches the limit
-// specified by the 'length' parameter.
-TEST(WideStringToUtf8Test, StopsWhenLengthLimitReached) {
-  EXPECT_STREQ("ABC", WideStringToUtf8(L"ABCDEF", 3).c_str());
-}
-
-#if !GTEST_WIDE_STRING_USES_UTF16_
-// Tests that Unicode code-points that have 17 to 21 bits are encoded
-// as 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx. This code may not compile
-// on the systems using UTF-16 encoding.
-TEST(WideStringToUtf8Test, CanEncode17To21Bits) {
-  // 0 0001 0000 1000 1101 0011 => 11110-000 10-010000 10-100011 10-010011
-  EXPECT_STREQ("\xF0\x90\xA3\x93", WideStringToUtf8(L"\x108D3", 1).c_str());
-  EXPECT_STREQ("\xF0\x90\xA3\x93", WideStringToUtf8(L"\x108D3", -1).c_str());
-
-  // 1 0000 1000 0110 0011 0100 => 11110-100 10-001000 10-011000 10-110100
-  EXPECT_STREQ("\xF4\x88\x98\xB4", WideStringToUtf8(L"\x108634", 1).c_str());
-  EXPECT_STREQ("\xF4\x88\x98\xB4", WideStringToUtf8(L"\x108634", -1).c_str());
-}
-
-// Tests that encoding an invalid code-point generates the expected result.
-TEST(WideStringToUtf8Test, CanEncodeInvalidCodePoint) {
-  EXPECT_STREQ("(Invalid Unicode 0xABCDFF)",
-               WideStringToUtf8(L"\xABCDFF", -1).c_str());
-}
-#else  // !GTEST_WIDE_STRING_USES_UTF16_
-// Tests that surrogate pairs are encoded correctly on the systems using
-// UTF-16 encoding in the wide strings.
-TEST(WideStringToUtf8Test, CanEncodeValidUtf16SUrrogatePairs) {
-  const wchar_t s[] = { 0xD801, 0xDC00, '\0' };
-  EXPECT_STREQ("\xF0\x90\x90\x80", WideStringToUtf8(s, -1).c_str());
-}
-
-// Tests that encoding an invalid UTF-16 surrogate pair
-// generates the expected result.
-TEST(WideStringToUtf8Test, CanEncodeInvalidUtf16SurrogatePair) {
-  // Leading surrogate is at the end of the string.
-  const wchar_t s1[] = { 0xD800, '\0' };
-  EXPECT_STREQ("\xED\xA0\x80", WideStringToUtf8(s1, -1).c_str());
-  // Leading surrogate is not followed by the trailing surrogate.
-  const wchar_t s2[] = { 0xD800, 'M', '\0' };
-  EXPECT_STREQ("\xED\xA0\x80M", WideStringToUtf8(s2, -1).c_str());
-  // Trailing surrogate appearas without a leading surrogate.
-  const wchar_t s3[] = { 0xDC00, 'P', 'Q', 'R', '\0' };
-  EXPECT_STREQ("\xED\xB0\x80PQR", WideStringToUtf8(s3, -1).c_str());
-}
-#endif  // !GTEST_WIDE_STRING_USES_UTF16_
-
-// Tests that codepoint concatenation works correctly.
-#if !GTEST_WIDE_STRING_USES_UTF16_
-TEST(WideStringToUtf8Test, ConcatenatesCodepointsCorrectly) {
-  const wchar_t s[] = { 0x108634, 0xC74D, '\n', 0x576, 0x8D3, 0x108634, '\0'};
-  EXPECT_STREQ(
-      "\xF4\x88\x98\xB4"
-          "\xEC\x9D\x8D"
-          "\n"
-          "\xD5\xB6"
-          "\xE0\xA3\x93"
-          "\xF4\x88\x98\xB4",
-      WideStringToUtf8(s, -1).c_str());
-}
-#else
-TEST(WideStringToUtf8Test, ConcatenatesCodepointsCorrectly) {
-  const wchar_t s[] = { 0xC74D, '\n', 0x576, 0x8D3, '\0'};
-  EXPECT_STREQ(
-      "\xEC\x9D\x8D" "\n" "\xD5\xB6" "\xE0\xA3\x93",
-      WideStringToUtf8(s, -1).c_str());
-}
-#endif  // !GTEST_WIDE_STRING_USES_UTF16_
-
-// Tests the Random class.
-
-TEST(RandomDeathTest, GeneratesCrashesOnInvalidRange) {
-  testing::internal::Random random(42);
-  EXPECT_DEATH_IF_SUPPORTED(
-      random.Generate(0),
-      "Cannot generate a number in the range \\[0, 0\\)");
-  EXPECT_DEATH_IF_SUPPORTED(
-      random.Generate(testing::internal::Random::kMaxRange + 1),
-      "Generation of a number in \\[0, 2147483649\\) was requested, "
-      "but this can only generate numbers in \\[0, 2147483648\\)");
-}
-
-TEST(RandomTest, GeneratesNumbersWithinRange) {
-  const UInt32 kRange = 10000;
-  testing::internal::Random random(12345);
-  for (int i = 0; i < 10; i++) {
-    EXPECT_LT(random.Generate(kRange), kRange) << " for iteration " << i;
-  }
-
-  testing::internal::Random random2(testing::internal::Random::kMaxRange);
-  for (int i = 0; i < 10; i++) {
-    EXPECT_LT(random2.Generate(kRange), kRange) << " for iteration " << i;
-  }
-}
-
-TEST(RandomTest, RepeatsWhenReseeded) {
-  const int kSeed = 123;
-  const int kArraySize = 10;
-  const UInt32 kRange = 10000;
-  UInt32 values[kArraySize];
-
-  testing::internal::Random random(kSeed);
-  for (int i = 0; i < kArraySize; i++) {
-    values[i] = random.Generate(kRange);
-  }
-
-  random.Reseed(kSeed);
-  for (int i = 0; i < kArraySize; i++) {
-    EXPECT_EQ(values[i], random.Generate(kRange)) << " for iteration " << i;
-  }
-}
-
-// Tests STL container utilities.
-
-// Tests CountIf().
-
-static bool IsPositive(int n) { return n > 0; }
-
-TEST(ContainerUtilityTest, CountIf) {
-  std::vector<int> v;
-  EXPECT_EQ(0, CountIf(v, IsPositive));  // Works for an empty container.
-
-  v.push_back(-1);
-  v.push_back(0);
-  EXPECT_EQ(0, CountIf(v, IsPositive));  // Works when no value satisfies.
-
-  v.push_back(2);
-  v.push_back(-10);
-  v.push_back(10);
-  EXPECT_EQ(2, CountIf(v, IsPositive));
-}
-
-// Tests ForEach().
-
-static int g_sum = 0;
-static void Accumulate(int n) { g_sum += n; }
-
-TEST(ContainerUtilityTest, ForEach) {
-  std::vector<int> v;
-  g_sum = 0;
-  ForEach(v, Accumulate);
-  EXPECT_EQ(0, g_sum);  // Works for an empty container;
-
-  g_sum = 0;
-  v.push_back(1);
-  ForEach(v, Accumulate);
-  EXPECT_EQ(1, g_sum);  // Works for a container with one element.
-
-  g_sum = 0;
-  v.push_back(20);
-  v.push_back(300);
-  ForEach(v, Accumulate);
-  EXPECT_EQ(321, g_sum);
-}
-
-// Tests GetElementOr().
-TEST(ContainerUtilityTest, GetElementOr) {
-  std::vector<char> a;
-  EXPECT_EQ('x', GetElementOr(a, 0, 'x'));
-
-  a.push_back('a');
-  a.push_back('b');
-  EXPECT_EQ('a', GetElementOr(a, 0, 'x'));
-  EXPECT_EQ('b', GetElementOr(a, 1, 'x'));
-  EXPECT_EQ('x', GetElementOr(a, -2, 'x'));
-  EXPECT_EQ('x', GetElementOr(a, 2, 'x'));
-}
-
-TEST(ContainerUtilityDeathTest, ShuffleRange) {
-  std::vector<int> a;
-  a.push_back(0);
-  a.push_back(1);
-  a.push_back(2);
-  testing::internal::Random random(1);
-
-  EXPECT_DEATH_IF_SUPPORTED(
-      ShuffleRange(&random, -1, 1, &a),
-      "Invalid shuffle range start -1: must be in range \\[0, 3\\]");
-  EXPECT_DEATH_IF_SUPPORTED(
-      ShuffleRange(&random, 4, 4, &a),
-      "Invalid shuffle range start 4: must be in range \\[0, 3\\]");
-  EXPECT_DEATH_IF_SUPPORTED(
-      ShuffleRange(&random, 3, 2, &a),
-      "Invalid shuffle range finish 2: must be in range \\[3, 3\\]");
-  EXPECT_DEATH_IF_SUPPORTED(
-      ShuffleRange(&random, 3, 4, &a),
-      "Invalid shuffle range finish 4: must be in range \\[3, 3\\]");
-}
-
-class VectorShuffleTest : public Test {
- protected:
-  static const size_t kVectorSize = 20;
-
-  VectorShuffleTest() : random_(1) {
-    for (int i = 0; i < static_cast<int>(kVectorSize); i++) {
-      vector_.push_back(i);
-    }
-  }
-
-  static bool VectorIsCorrupt(const TestingVector& vector) {
-    if (kVectorSize != vector.size()) {
-      return true;
-    }
-
-    bool found_in_vector[kVectorSize] = { false };
-    for (size_t i = 0; i < vector.size(); i++) {
-      const int e = vector[i];
-      if (e < 0 || e >= static_cast<int>(kVectorSize) || found_in_vector[e]) {
-        return true;
-      }
-      found_in_vector[e] = true;
-    }
-
-    // Vector size is correct, elements' range is correct, no
-    // duplicate elements.  Therefore no corruption has occurred.
-    return false;
-  }
-
-  static bool VectorIsNotCorrupt(const TestingVector& vector) {
-    return !VectorIsCorrupt(vector);
-  }
-
-  static bool RangeIsShuffled(const TestingVector& vector, int begin, int end) {
-    for (int i = begin; i < end; i++) {
-      if (i != vector[static_cast<size_t>(i)]) {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  static bool RangeIsUnshuffled(
-      const TestingVector& vector, int begin, int end) {
-    return !RangeIsShuffled(vector, begin, end);
-  }
-
-  static bool VectorIsShuffled(const TestingVector& vector) {
-    return RangeIsShuffled(vector, 0, static_cast<int>(vector.size()));
-  }
-
-  static bool VectorIsUnshuffled(const TestingVector& vector) {
-    return !VectorIsShuffled(vector);
-  }
-
-  testing::internal::Random random_;
-  TestingVector vector_;
-};  // class VectorShuffleTest
-
-const size_t VectorShuffleTest::kVectorSize;
-
-TEST_F(VectorShuffleTest, HandlesEmptyRange) {
-  // Tests an empty range at the beginning...
-  ShuffleRange(&random_, 0, 0, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...in the middle...
-  ShuffleRange(&random_, kVectorSize/2, kVectorSize/2, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...at the end...
-  ShuffleRange(&random_, kVectorSize - 1, kVectorSize - 1, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...and past the end.
-  ShuffleRange(&random_, kVectorSize, kVectorSize, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-}
-
-TEST_F(VectorShuffleTest, HandlesRangeOfSizeOne) {
-  // Tests a size one range at the beginning...
-  ShuffleRange(&random_, 0, 1, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...in the middle...
-  ShuffleRange(&random_, kVectorSize/2, kVectorSize/2 + 1, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...and at the end.
-  ShuffleRange(&random_, kVectorSize - 1, kVectorSize, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-}
-
-// Because we use our own random number generator and a fixed seed,
-// we can guarantee that the following "random" tests will succeed.
-
-TEST_F(VectorShuffleTest, ShufflesEntireVector) {
-  Shuffle(&random_, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  EXPECT_FALSE(VectorIsUnshuffled(vector_)) << vector_;
-
-  // Tests the first and last elements in particular to ensure that
-  // there are no off-by-one problems in our shuffle algorithm.
-  EXPECT_NE(0, vector_[0]);
-  EXPECT_NE(static_cast<int>(kVectorSize - 1), vector_[kVectorSize - 1]);
-}
-
-TEST_F(VectorShuffleTest, ShufflesStartOfVector) {
-  const int kRangeSize = kVectorSize/2;
-
-  ShuffleRange(&random_, 0, kRangeSize, &vector_);
-
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  EXPECT_PRED3(RangeIsShuffled, vector_, 0, kRangeSize);
-  EXPECT_PRED3(RangeIsUnshuffled, vector_, kRangeSize,
-               static_cast<int>(kVectorSize));
-}
-
-TEST_F(VectorShuffleTest, ShufflesEndOfVector) {
-  const int kRangeSize = kVectorSize / 2;
-  ShuffleRange(&random_, kRangeSize, kVectorSize, &vector_);
-
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  EXPECT_PRED3(RangeIsUnshuffled, vector_, 0, kRangeSize);
-  EXPECT_PRED3(RangeIsShuffled, vector_, kRangeSize,
-               static_cast<int>(kVectorSize));
-}
-
-TEST_F(VectorShuffleTest, ShufflesMiddleOfVector) {
-  const int kRangeSize = static_cast<int>(kVectorSize) / 3;
-  ShuffleRange(&random_, kRangeSize, 2*kRangeSize, &vector_);
-
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  EXPECT_PRED3(RangeIsUnshuffled, vector_, 0, kRangeSize);
-  EXPECT_PRED3(RangeIsShuffled, vector_, kRangeSize, 2*kRangeSize);
-  EXPECT_PRED3(RangeIsUnshuffled, vector_, 2 * kRangeSize,
-               static_cast<int>(kVectorSize));
-}
-
-TEST_F(VectorShuffleTest, ShufflesRepeatably) {
-  TestingVector vector2;
-  for (size_t i = 0; i < kVectorSize; i++) {
-    vector2.push_back(static_cast<int>(i));
-  }
-
-  random_.Reseed(1234);
-  Shuffle(&random_, &vector_);
-  random_.Reseed(1234);
-  Shuffle(&random_, &vector2);
-
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector2);
-
-  for (size_t i = 0; i < kVectorSize; i++) {
-    EXPECT_EQ(vector_[i], vector2[i]) << " where i is " << i;
-  }
-}
-
-// Tests the size of the AssertHelper class.
-
-TEST(AssertHelperTest, AssertHelperIsSmall) {
-  // To avoid breaking clients that use lots of assertions in one
-  // function, we cannot grow the size of AssertHelper.
-  EXPECT_LE(sizeof(testing::internal::AssertHelper), sizeof(void*));
-}
-
-// Tests String::EndsWithCaseInsensitive().
-TEST(StringTest, EndsWithCaseInsensitive) {
-  EXPECT_TRUE(String::EndsWithCaseInsensitive("foobar", "BAR"));
-  EXPECT_TRUE(String::EndsWithCaseInsensitive("foobaR", "bar"));
-  EXPECT_TRUE(String::EndsWithCaseInsensitive("foobar", ""));
-  EXPECT_TRUE(String::EndsWithCaseInsensitive("", ""));
-
-  EXPECT_FALSE(String::EndsWithCaseInsensitive("Foobar", "foo"));
-  EXPECT_FALSE(String::EndsWithCaseInsensitive("foobar", "Foo"));
-  EXPECT_FALSE(String::EndsWithCaseInsensitive("", "foo"));
-}
-
-// C++Builder's preprocessor is buggy; it fails to expand macros that
-// appear in macro parameters after wide char literals.  Provide an alias
-// for NULL as a workaround.
-static const wchar_t* const kNull = nullptr;
-
-// Tests String::CaseInsensitiveWideCStringEquals
-TEST(StringTest, CaseInsensitiveWideCStringEquals) {
-  EXPECT_TRUE(String::CaseInsensitiveWideCStringEquals(nullptr, nullptr));
-  EXPECT_FALSE(String::CaseInsensitiveWideCStringEquals(kNull, L""));
-  EXPECT_FALSE(String::CaseInsensitiveWideCStringEquals(L"", kNull));
-  EXPECT_FALSE(String::CaseInsensitiveWideCStringEquals(kNull, L"foobar"));
-  EXPECT_FALSE(String::CaseInsensitiveWideCStringEquals(L"foobar", kNull));
-  EXPECT_TRUE(String::CaseInsensitiveWideCStringEquals(L"foobar", L"foobar"));
-  EXPECT_TRUE(String::CaseInsensitiveWideCStringEquals(L"foobar", L"FOOBAR"));
-  EXPECT_TRUE(String::CaseInsensitiveWideCStringEquals(L"FOOBAR", L"foobar"));
-}
-
-#if GTEST_OS_WINDOWS
-
-// Tests String::ShowWideCString().
-TEST(StringTest, ShowWideCString) {
-  EXPECT_STREQ("(null)",
-               String::ShowWideCString(NULL).c_str());
-  EXPECT_STREQ("", String::ShowWideCString(L"").c_str());
-  EXPECT_STREQ("foo", String::ShowWideCString(L"foo").c_str());
-}
-
-# if GTEST_OS_WINDOWS_MOBILE
-TEST(StringTest, AnsiAndUtf16Null) {
-  EXPECT_EQ(NULL, String::AnsiToUtf16(NULL));
-  EXPECT_EQ(NULL, String::Utf16ToAnsi(NULL));
-}
-
-TEST(StringTest, AnsiAndUtf16ConvertBasic) {
-  const char* ansi = String::Utf16ToAnsi(L"str");
-  EXPECT_STREQ("str", ansi);
-  delete [] ansi;
-  const WCHAR* utf16 = String::AnsiToUtf16("str");
-  EXPECT_EQ(0, wcsncmp(L"str", utf16, 3));
-  delete [] utf16;
-}
-
-TEST(StringTest, AnsiAndUtf16ConvertPathChars) {
-  const char* ansi = String::Utf16ToAnsi(L".:\\ \"*?");
-  EXPECT_STREQ(".:\\ \"*?", ansi);
-  delete [] ansi;
-  const WCHAR* utf16 = String::AnsiToUtf16(".:\\ \"*?");
-  EXPECT_EQ(0, wcsncmp(L".:\\ \"*?", utf16, 3));
-  delete [] utf16;
-}
-# endif  // GTEST_OS_WINDOWS_MOBILE
-
-#endif  // GTEST_OS_WINDOWS
-
-// Tests TestProperty construction.
-TEST(TestPropertyTest, StringValue) {
-  TestProperty property("key", "1");
-  EXPECT_STREQ("key", property.key());
-  EXPECT_STREQ("1", property.value());
-}
-
-// Tests TestProperty replacing a value.
-TEST(TestPropertyTest, ReplaceStringValue) {
-  TestProperty property("key", "1");
-  EXPECT_STREQ("1", property.value());
-  property.SetValue("2");
-  EXPECT_STREQ("2", property.value());
-}
-
-// AddFatalFailure() and AddNonfatalFailure() must be stand-alone
-// functions (i.e. their definitions cannot be inlined at the call
-// sites), or C++Builder won't compile the code.
-static void AddFatalFailure() {
-  FAIL() << "Expected fatal failure.";
-}
-
-static void AddNonfatalFailure() {
-  ADD_FAILURE() << "Expected non-fatal failure.";
-}
-
-class ScopedFakeTestPartResultReporterTest : public Test {
- public:  // Must be public and not protected due to a bug in g++ 3.4.2.
-  enum FailureMode {
-    FATAL_FAILURE,
-    NONFATAL_FAILURE
-  };
-  static void AddFailure(FailureMode failure) {
-    if (failure == FATAL_FAILURE) {
-      AddFatalFailure();
-    } else {
-      AddNonfatalFailure();
-    }
-  }
-};
-
-// Tests that ScopedFakeTestPartResultReporter intercepts test
-// failures.
-TEST_F(ScopedFakeTestPartResultReporterTest, InterceptsTestFailures) {
-  TestPartResultArray results;
-  {
-    ScopedFakeTestPartResultReporter reporter(
-        ScopedFakeTestPartResultReporter::INTERCEPT_ONLY_CURRENT_THREAD,
-        &results);
-    AddFailure(NONFATAL_FAILURE);
-    AddFailure(FATAL_FAILURE);
-  }
-
-  EXPECT_EQ(2, results.size());
-  EXPECT_TRUE(results.GetTestPartResult(0).nonfatally_failed());
-  EXPECT_TRUE(results.GetTestPartResult(1).fatally_failed());
-}
-
-TEST_F(ScopedFakeTestPartResultReporterTest, DeprecatedConstructor) {
-  TestPartResultArray results;
-  {
-    // Tests, that the deprecated constructor still works.
-    ScopedFakeTestPartResultReporter reporter(&results);
-    AddFailure(NONFATAL_FAILURE);
-  }
-  EXPECT_EQ(1, results.size());
-}
-
-#if GTEST_IS_THREADSAFE
-
-class ScopedFakeTestPartResultReporterWithThreadsTest
-  : public ScopedFakeTestPartResultReporterTest {
- protected:
-  static void AddFailureInOtherThread(FailureMode failure) {
-    ThreadWithParam<FailureMode> thread(&AddFailure, failure, nullptr);
-    thread.Join();
-  }
-};
-
-TEST_F(ScopedFakeTestPartResultReporterWithThreadsTest,
-       InterceptsTestFailuresInAllThreads) {
-  TestPartResultArray results;
-  {
-    ScopedFakeTestPartResultReporter reporter(
-        ScopedFakeTestPartResultReporter::INTERCEPT_ALL_THREADS, &results);
-    AddFailure(NONFATAL_FAILURE);
-    AddFailure(FATAL_FAILURE);
-    AddFailureInOtherThread(NONFATAL_FAILURE);
-    AddFailureInOtherThread(FATAL_FAILURE);
-  }
-
-  EXPECT_EQ(4, results.size());
-  EXPECT_TRUE(results.GetTestPartResult(0).nonfatally_failed());
-  EXPECT_TRUE(results.GetTestPartResult(1).fatally_failed());
-  EXPECT_TRUE(results.GetTestPartResult(2).nonfatally_failed());
-  EXPECT_TRUE(results.GetTestPartResult(3).fatally_failed());
-}
-
-#endif  // GTEST_IS_THREADSAFE
-
-// Tests EXPECT_FATAL_FAILURE{,ON_ALL_THREADS}.  Makes sure that they
-// work even if the failure is generated in a called function rather than
-// the current context.
-
-typedef ScopedFakeTestPartResultReporterTest ExpectFatalFailureTest;
-
-TEST_F(ExpectFatalFailureTest, CatchesFatalFaliure) {
-  EXPECT_FATAL_FAILURE(AddFatalFailure(), "Expected fatal failure.");
-}
-
-TEST_F(ExpectFatalFailureTest, AcceptsStdStringObject) {
-  EXPECT_FATAL_FAILURE(AddFatalFailure(),
-                       ::std::string("Expected fatal failure."));
-}
-
-TEST_F(ExpectFatalFailureTest, CatchesFatalFailureOnAllThreads) {
-  // We have another test below to verify that the macro catches fatal
-  // failures generated on another thread.
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(AddFatalFailure(),
-                                      "Expected fatal failure.");
-}
-
-#ifdef __BORLANDC__
-// Silences warnings: "Condition is always true"
-# pragma option push -w-ccc
-#endif
-
-// Tests that EXPECT_FATAL_FAILURE() can be used in a non-void
-// function even when the statement in it contains ASSERT_*.
-
-int NonVoidFunction() {
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(false), "");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(FAIL(), "");
-  return 0;
-}
-
-TEST_F(ExpectFatalFailureTest, CanBeUsedInNonVoidFunction) {
-  NonVoidFunction();
-}
-
-// Tests that EXPECT_FATAL_FAILURE(statement, ...) doesn't abort the
-// current function even though 'statement' generates a fatal failure.
-
-void DoesNotAbortHelper(bool* aborted) {
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(false), "");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(FAIL(), "");
-
-  *aborted = false;
-}
-
-#ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them.
-# pragma option pop
-#endif
-
-TEST_F(ExpectFatalFailureTest, DoesNotAbort) {
-  bool aborted = true;
-  DoesNotAbortHelper(&aborted);
-  EXPECT_FALSE(aborted);
-}
-
-// Tests that the EXPECT_FATAL_FAILURE{,_ON_ALL_THREADS} accepts a
-// statement that contains a macro which expands to code containing an
-// unprotected comma.
-
-static int global_var = 0;
-#define GTEST_USE_UNPROTECTED_COMMA_ global_var++, global_var++
-
-TEST_F(ExpectFatalFailureTest, AcceptsMacroThatExpandsToUnprotectedComma) {
-#ifndef __BORLANDC__
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE({
-    GTEST_USE_UNPROTECTED_COMMA_;
-    AddFatalFailure();
-  }, "");
-#endif
-
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS({
-    GTEST_USE_UNPROTECTED_COMMA_;
-    AddFatalFailure();
-  }, "");
-}
-
-// Tests EXPECT_NONFATAL_FAILURE{,ON_ALL_THREADS}.
-
-typedef ScopedFakeTestPartResultReporterTest ExpectNonfatalFailureTest;
-
-TEST_F(ExpectNonfatalFailureTest, CatchesNonfatalFailure) {
-  EXPECT_NONFATAL_FAILURE(AddNonfatalFailure(),
-                          "Expected non-fatal failure.");
-}
-
-TEST_F(ExpectNonfatalFailureTest, AcceptsStdStringObject) {
-  EXPECT_NONFATAL_FAILURE(AddNonfatalFailure(),
-                          ::std::string("Expected non-fatal failure."));
-}
-
-TEST_F(ExpectNonfatalFailureTest, CatchesNonfatalFailureOnAllThreads) {
-  // We have another test below to verify that the macro catches
-  // non-fatal failures generated on another thread.
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(AddNonfatalFailure(),
-                                         "Expected non-fatal failure.");
-}
-
-// Tests that the EXPECT_NONFATAL_FAILURE{,_ON_ALL_THREADS} accepts a
-// statement that contains a macro which expands to code containing an
-// unprotected comma.
-TEST_F(ExpectNonfatalFailureTest, AcceptsMacroThatExpandsToUnprotectedComma) {
-  EXPECT_NONFATAL_FAILURE({
-    GTEST_USE_UNPROTECTED_COMMA_;
-    AddNonfatalFailure();
-  }, "");
-
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS({
-    GTEST_USE_UNPROTECTED_COMMA_;
-    AddNonfatalFailure();
-  }, "");
-}
-
-#if GTEST_IS_THREADSAFE
-
-typedef ScopedFakeTestPartResultReporterWithThreadsTest
-    ExpectFailureWithThreadsTest;
-
-TEST_F(ExpectFailureWithThreadsTest, ExpectFatalFailureOnAllThreads) {
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(AddFailureInOtherThread(FATAL_FAILURE),
-                                      "Expected fatal failure.");
-}
-
-TEST_F(ExpectFailureWithThreadsTest, ExpectNonFatalFailureOnAllThreads) {
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(
-      AddFailureInOtherThread(NONFATAL_FAILURE), "Expected non-fatal failure.");
-}
-
-#endif  // GTEST_IS_THREADSAFE
-
-// Tests the TestProperty class.
-
-TEST(TestPropertyTest, ConstructorWorks) {
-  const TestProperty property("key", "value");
-  EXPECT_STREQ("key", property.key());
-  EXPECT_STREQ("value", property.value());
-}
-
-TEST(TestPropertyTest, SetValue) {
-  TestProperty property("key", "value_1");
-  EXPECT_STREQ("key", property.key());
-  property.SetValue("value_2");
-  EXPECT_STREQ("key", property.key());
-  EXPECT_STREQ("value_2", property.value());
-}
-
-// Tests the TestResult class
-
-// The test fixture for testing TestResult.
-class TestResultTest : public Test {
- protected:
-  typedef std::vector<TestPartResult> TPRVector;
-
-  // We make use of 2 TestPartResult objects,
-  TestPartResult * pr1, * pr2;
-
-  // ... and 3 TestResult objects.
-  TestResult * r0, * r1, * r2;
-
-  void SetUp() override {
-    // pr1 is for success.
-    pr1 = new TestPartResult(TestPartResult::kSuccess,
-                             "foo/bar.cc",
-                             10,
-                             "Success!");
-
-    // pr2 is for fatal failure.
-    pr2 = new TestPartResult(TestPartResult::kFatalFailure,
-                             "foo/bar.cc",
-                             -1,  // This line number means "unknown"
-                             "Failure!");
-
-    // Creates the TestResult objects.
-    r0 = new TestResult();
-    r1 = new TestResult();
-    r2 = new TestResult();
-
-    // In order to test TestResult, we need to modify its internal
-    // state, in particular the TestPartResult vector it holds.
-    // test_part_results() returns a const reference to this vector.
-    // We cast it to a non-const object s.t. it can be modified
-    TPRVector* results1 = const_cast<TPRVector*>(
-        &TestResultAccessor::test_part_results(*r1));
-    TPRVector* results2 = const_cast<TPRVector*>(
-        &TestResultAccessor::test_part_results(*r2));
-
-    // r0 is an empty TestResult.
-
-    // r1 contains a single SUCCESS TestPartResult.
-    results1->push_back(*pr1);
-
-    // r2 contains a SUCCESS, and a FAILURE.
-    results2->push_back(*pr1);
-    results2->push_back(*pr2);
-  }
-
-  void TearDown() override {
-    delete pr1;
-    delete pr2;
-
-    delete r0;
-    delete r1;
-    delete r2;
-  }
-
-  // Helper that compares two TestPartResults.
-  static void CompareTestPartResult(const TestPartResult& expected,
-                                    const TestPartResult& actual) {
-    EXPECT_EQ(expected.type(), actual.type());
-    EXPECT_STREQ(expected.file_name(), actual.file_name());
-    EXPECT_EQ(expected.line_number(), actual.line_number());
-    EXPECT_STREQ(expected.summary(), actual.summary());
-    EXPECT_STREQ(expected.message(), actual.message());
-    EXPECT_EQ(expected.passed(), actual.passed());
-    EXPECT_EQ(expected.failed(), actual.failed());
-    EXPECT_EQ(expected.nonfatally_failed(), actual.nonfatally_failed());
-    EXPECT_EQ(expected.fatally_failed(), actual.fatally_failed());
-  }
-};
-
-// Tests TestResult::total_part_count().
-TEST_F(TestResultTest, total_part_count) {
-  ASSERT_EQ(0, r0->total_part_count());
-  ASSERT_EQ(1, r1->total_part_count());
-  ASSERT_EQ(2, r2->total_part_count());
-}
-
-// Tests TestResult::Passed().
-TEST_F(TestResultTest, Passed) {
-  ASSERT_TRUE(r0->Passed());
-  ASSERT_TRUE(r1->Passed());
-  ASSERT_FALSE(r2->Passed());
-}
-
-// Tests TestResult::Failed().
-TEST_F(TestResultTest, Failed) {
-  ASSERT_FALSE(r0->Failed());
-  ASSERT_FALSE(r1->Failed());
-  ASSERT_TRUE(r2->Failed());
-}
-
-// Tests TestResult::GetTestPartResult().
-
-typedef TestResultTest TestResultDeathTest;
-
-TEST_F(TestResultDeathTest, GetTestPartResult) {
-  CompareTestPartResult(*pr1, r2->GetTestPartResult(0));
-  CompareTestPartResult(*pr2, r2->GetTestPartResult(1));
-  EXPECT_DEATH_IF_SUPPORTED(r2->GetTestPartResult(2), "");
-  EXPECT_DEATH_IF_SUPPORTED(r2->GetTestPartResult(-1), "");
-}
-
-// Tests TestResult has no properties when none are added.
-TEST(TestResultPropertyTest, NoPropertiesFoundWhenNoneAreAdded) {
-  TestResult test_result;
-  ASSERT_EQ(0, test_result.test_property_count());
-}
-
-// Tests TestResult has the expected property when added.
-TEST(TestResultPropertyTest, OnePropertyFoundWhenAdded) {
-  TestResult test_result;
-  TestProperty property("key_1", "1");
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property);
-  ASSERT_EQ(1, test_result.test_property_count());
-  const TestProperty& actual_property = test_result.GetTestProperty(0);
-  EXPECT_STREQ("key_1", actual_property.key());
-  EXPECT_STREQ("1", actual_property.value());
-}
-
-// Tests TestResult has multiple properties when added.
-TEST(TestResultPropertyTest, MultiplePropertiesFoundWhenAdded) {
-  TestResult test_result;
-  TestProperty property_1("key_1", "1");
-  TestProperty property_2("key_2", "2");
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_1);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_2);
-  ASSERT_EQ(2, test_result.test_property_count());
-  const TestProperty& actual_property_1 = test_result.GetTestProperty(0);
-  EXPECT_STREQ("key_1", actual_property_1.key());
-  EXPECT_STREQ("1", actual_property_1.value());
-
-  const TestProperty& actual_property_2 = test_result.GetTestProperty(1);
-  EXPECT_STREQ("key_2", actual_property_2.key());
-  EXPECT_STREQ("2", actual_property_2.value());
-}
-
-// Tests TestResult::RecordProperty() overrides values for duplicate keys.
-TEST(TestResultPropertyTest, OverridesValuesForDuplicateKeys) {
-  TestResult test_result;
-  TestProperty property_1_1("key_1", "1");
-  TestProperty property_2_1("key_2", "2");
-  TestProperty property_1_2("key_1", "12");
-  TestProperty property_2_2("key_2", "22");
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_1_1);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_2_1);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_1_2);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_2_2);
-
-  ASSERT_EQ(2, test_result.test_property_count());
-  const TestProperty& actual_property_1 = test_result.GetTestProperty(0);
-  EXPECT_STREQ("key_1", actual_property_1.key());
-  EXPECT_STREQ("12", actual_property_1.value());
-
-  const TestProperty& actual_property_2 = test_result.GetTestProperty(1);
-  EXPECT_STREQ("key_2", actual_property_2.key());
-  EXPECT_STREQ("22", actual_property_2.value());
-}
-
-// Tests TestResult::GetTestProperty().
-TEST(TestResultPropertyTest, GetTestProperty) {
-  TestResult test_result;
-  TestProperty property_1("key_1", "1");
-  TestProperty property_2("key_2", "2");
-  TestProperty property_3("key_3", "3");
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_1);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_2);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_3);
-
-  const TestProperty& fetched_property_1 = test_result.GetTestProperty(0);
-  const TestProperty& fetched_property_2 = test_result.GetTestProperty(1);
-  const TestProperty& fetched_property_3 = test_result.GetTestProperty(2);
-
-  EXPECT_STREQ("key_1", fetched_property_1.key());
-  EXPECT_STREQ("1", fetched_property_1.value());
-
-  EXPECT_STREQ("key_2", fetched_property_2.key());
-  EXPECT_STREQ("2", fetched_property_2.value());
-
-  EXPECT_STREQ("key_3", fetched_property_3.key());
-  EXPECT_STREQ("3", fetched_property_3.value());
-
-  EXPECT_DEATH_IF_SUPPORTED(test_result.GetTestProperty(3), "");
-  EXPECT_DEATH_IF_SUPPORTED(test_result.GetTestProperty(-1), "");
-}
-
-// Tests the Test class.
-//
-// It's difficult to test every public method of this class (we are
-// already stretching the limit of Google Test by using it to test itself!).
-// Fortunately, we don't have to do that, as we are already testing
-// the functionalities of the Test class extensively by using Google Test
-// alone.
-//
-// Therefore, this section only contains one test.
-
-// Tests that GTestFlagSaver works on Windows and Mac.
-
-class GTestFlagSaverTest : public Test {
- protected:
-  // Saves the Google Test flags such that we can restore them later, and
-  // then sets them to their default values.  This will be called
-  // before the first test in this test case is run.
-  static void SetUpTestSuite() {
-    saver_ = new GTestFlagSaver;
-
-    GTEST_FLAG(also_run_disabled_tests) = false;
-    GTEST_FLAG(break_on_failure) = false;
-    GTEST_FLAG(catch_exceptions) = false;
-    GTEST_FLAG(death_test_use_fork) = false;
-    GTEST_FLAG(color) = "auto";
-    GTEST_FLAG(filter) = "";
-    GTEST_FLAG(list_tests) = false;
-    GTEST_FLAG(output) = "";
-    GTEST_FLAG(print_time) = true;
-    GTEST_FLAG(random_seed) = 0;
-    GTEST_FLAG(repeat) = 1;
-    GTEST_FLAG(shuffle) = false;
-    GTEST_FLAG(stack_trace_depth) = kMaxStackTraceDepth;
-    GTEST_FLAG(stream_result_to) = "";
-    GTEST_FLAG(throw_on_failure) = false;
-  }
-
-  // Restores the Google Test flags that the tests have modified.  This will
-  // be called after the last test in this test case is run.
-  static void TearDownTestSuite() {
-    delete saver_;
-    saver_ = nullptr;
-  }
-
-  // Verifies that the Google Test flags have their default values, and then
-  // modifies each of them.
-  void VerifyAndModifyFlags() {
-    EXPECT_FALSE(GTEST_FLAG(also_run_disabled_tests));
-    EXPECT_FALSE(GTEST_FLAG(break_on_failure));
-    EXPECT_FALSE(GTEST_FLAG(catch_exceptions));
-    EXPECT_STREQ("auto", GTEST_FLAG(color).c_str());
-    EXPECT_FALSE(GTEST_FLAG(death_test_use_fork));
-    EXPECT_STREQ("", GTEST_FLAG(filter).c_str());
-    EXPECT_FALSE(GTEST_FLAG(list_tests));
-    EXPECT_STREQ("", GTEST_FLAG(output).c_str());
-    EXPECT_TRUE(GTEST_FLAG(print_time));
-    EXPECT_EQ(0, GTEST_FLAG(random_seed));
-    EXPECT_EQ(1, GTEST_FLAG(repeat));
-    EXPECT_FALSE(GTEST_FLAG(shuffle));
-    EXPECT_EQ(kMaxStackTraceDepth, GTEST_FLAG(stack_trace_depth));
-    EXPECT_STREQ("", GTEST_FLAG(stream_result_to).c_str());
-    EXPECT_FALSE(GTEST_FLAG(throw_on_failure));
-
-    GTEST_FLAG(also_run_disabled_tests) = true;
-    GTEST_FLAG(break_on_failure) = true;
-    GTEST_FLAG(catch_exceptions) = true;
-    GTEST_FLAG(color) = "no";
-    GTEST_FLAG(death_test_use_fork) = true;
-    GTEST_FLAG(filter) = "abc";
-    GTEST_FLAG(list_tests) = true;
-    GTEST_FLAG(output) = "xml:foo.xml";
-    GTEST_FLAG(print_time) = false;
-    GTEST_FLAG(random_seed) = 1;
-    GTEST_FLAG(repeat) = 100;
-    GTEST_FLAG(shuffle) = true;
-    GTEST_FLAG(stack_trace_depth) = 1;
-    GTEST_FLAG(stream_result_to) = "localhost:1234";
-    GTEST_FLAG(throw_on_failure) = true;
-  }
-
- private:
-  // For saving Google Test flags during this test case.
-  static GTestFlagSaver* saver_;
-};
-
-GTestFlagSaver* GTestFlagSaverTest::saver_ = nullptr;
-
-// Google Test doesn't guarantee the order of tests.  The following two
-// tests are designed to work regardless of their order.
-
-// Modifies the Google Test flags in the test body.
-TEST_F(GTestFlagSaverTest, ModifyGTestFlags) {
-  VerifyAndModifyFlags();
-}
-
-// Verifies that the Google Test flags in the body of the previous test were
-// restored to their original values.
-TEST_F(GTestFlagSaverTest, VerifyGTestFlags) {
-  VerifyAndModifyFlags();
-}
-
-// Sets an environment variable with the given name to the given
-// value.  If the value argument is "", unsets the environment
-// variable.  The caller must ensure that both arguments are not NULL.
-static void SetEnv(const char* name, const char* value) {
-#if GTEST_OS_WINDOWS_MOBILE
-  // Environment variables are not supported on Windows CE.
-  return;
-#elif defined(__BORLANDC__) || defined(__SunOS_5_8) || defined(__SunOS_5_9)
-  // C++Builder's putenv only stores a pointer to its parameter; we have to
-  // ensure that the string remains valid as long as it might be needed.
-  // We use an std::map to do so.
-  static std::map<std::string, std::string*> added_env;
-
-  // Because putenv stores a pointer to the string buffer, we can't delete the
-  // previous string (if present) until after it's replaced.
-  std::string *prev_env = NULL;
-  if (added_env.find(name) != added_env.end()) {
-    prev_env = added_env[name];
-  }
-  added_env[name] = new std::string(
-      (Message() << name << "=" << value).GetString());
-
-  // The standard signature of putenv accepts a 'char*' argument. Other
-  // implementations, like C++Builder's, accept a 'const char*'.
-  // We cast away the 'const' since that would work for both variants.
-  putenv(const_cast<char*>(added_env[name]->c_str()));
-  delete prev_env;
-#elif GTEST_OS_WINDOWS  // If we are on Windows proper.
-  _putenv((Message() << name << "=" << value).GetString().c_str());
-#else
-  if (*value == '\0') {
-    unsetenv(name);
-  } else {
-    setenv(name, value, 1);
-  }
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-#if !GTEST_OS_WINDOWS_MOBILE
-// Environment variables are not supported on Windows CE.
-
-using testing::internal::Int32FromGTestEnv;
-
-// Tests Int32FromGTestEnv().
-
-// Tests that Int32FromGTestEnv() returns the default value when the
-// environment variable is not set.
-TEST(Int32FromGTestEnvTest, ReturnsDefaultWhenVariableIsNotSet) {
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "");
-  EXPECT_EQ(10, Int32FromGTestEnv("temp", 10));
-}
-
-# if !defined(GTEST_GET_INT32_FROM_ENV_)
-
-// Tests that Int32FromGTestEnv() returns the default value when the
-// environment variable overflows as an Int32.
-TEST(Int32FromGTestEnvTest, ReturnsDefaultWhenValueOverflows) {
-  printf("(expecting 2 warnings)\n");
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "12345678987654321");
-  EXPECT_EQ(20, Int32FromGTestEnv("temp", 20));
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "-12345678987654321");
-  EXPECT_EQ(30, Int32FromGTestEnv("temp", 30));
-}
-
-// Tests that Int32FromGTestEnv() returns the default value when the
-// environment variable does not represent a valid decimal integer.
-TEST(Int32FromGTestEnvTest, ReturnsDefaultWhenValueIsInvalid) {
-  printf("(expecting 2 warnings)\n");
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "A1");
-  EXPECT_EQ(40, Int32FromGTestEnv("temp", 40));
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "12X");
-  EXPECT_EQ(50, Int32FromGTestEnv("temp", 50));
-}
-
-# endif  // !defined(GTEST_GET_INT32_FROM_ENV_)
-
-// Tests that Int32FromGTestEnv() parses and returns the value of the
-// environment variable when it represents a valid decimal integer in
-// the range of an Int32.
-TEST(Int32FromGTestEnvTest, ParsesAndReturnsValidValue) {
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "123");
-  EXPECT_EQ(123, Int32FromGTestEnv("temp", 0));
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "-321");
-  EXPECT_EQ(-321, Int32FromGTestEnv("temp", 0));
-}
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Tests ParseInt32Flag().
-
-// Tests that ParseInt32Flag() returns false and doesn't change the
-// output value when the flag has wrong format
-TEST(ParseInt32FlagTest, ReturnsFalseForInvalidFlag) {
-  Int32 value = 123;
-  EXPECT_FALSE(ParseInt32Flag("--a=100", "b", &value));
-  EXPECT_EQ(123, value);
-
-  EXPECT_FALSE(ParseInt32Flag("a=100", "a", &value));
-  EXPECT_EQ(123, value);
-}
-
-// Tests that ParseInt32Flag() returns false and doesn't change the
-// output value when the flag overflows as an Int32.
-TEST(ParseInt32FlagTest, ReturnsDefaultWhenValueOverflows) {
-  printf("(expecting 2 warnings)\n");
-
-  Int32 value = 123;
-  EXPECT_FALSE(ParseInt32Flag("--abc=12345678987654321", "abc", &value));
-  EXPECT_EQ(123, value);
-
-  EXPECT_FALSE(ParseInt32Flag("--abc=-12345678987654321", "abc", &value));
-  EXPECT_EQ(123, value);
-}
-
-// Tests that ParseInt32Flag() returns false and doesn't change the
-// output value when the flag does not represent a valid decimal
-// integer.
-TEST(ParseInt32FlagTest, ReturnsDefaultWhenValueIsInvalid) {
-  printf("(expecting 2 warnings)\n");
-
-  Int32 value = 123;
-  EXPECT_FALSE(ParseInt32Flag("--abc=A1", "abc", &value));
-  EXPECT_EQ(123, value);
-
-  EXPECT_FALSE(ParseInt32Flag("--abc=12X", "abc", &value));
-  EXPECT_EQ(123, value);
-}
-
-// Tests that ParseInt32Flag() parses the value of the flag and
-// returns true when the flag represents a valid decimal integer in
-// the range of an Int32.
-TEST(ParseInt32FlagTest, ParsesAndReturnsValidValue) {
-  Int32 value = 123;
-  EXPECT_TRUE(ParseInt32Flag("--" GTEST_FLAG_PREFIX_ "abc=456", "abc", &value));
-  EXPECT_EQ(456, value);
-
-  EXPECT_TRUE(ParseInt32Flag("--" GTEST_FLAG_PREFIX_ "abc=-789",
-                             "abc", &value));
-  EXPECT_EQ(-789, value);
-}
-
-// Tests that Int32FromEnvOrDie() parses the value of the var or
-// returns the correct default.
-// Environment variables are not supported on Windows CE.
-#if !GTEST_OS_WINDOWS_MOBILE
-TEST(Int32FromEnvOrDieTest, ParsesAndReturnsValidValue) {
-  EXPECT_EQ(333, Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", 333));
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", "123");
-  EXPECT_EQ(123, Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", 333));
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", "-123");
-  EXPECT_EQ(-123, Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", 333));
-}
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Tests that Int32FromEnvOrDie() aborts with an error message
-// if the variable is not an Int32.
-TEST(Int32FromEnvOrDieDeathTest, AbortsOnFailure) {
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "VAR", "xxx");
-  EXPECT_DEATH_IF_SUPPORTED(
-      Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "VAR", 123),
-      ".*");
-}
-
-// Tests that Int32FromEnvOrDie() aborts with an error message
-// if the variable cannot be represented by an Int32.
-TEST(Int32FromEnvOrDieDeathTest, AbortsOnInt32Overflow) {
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "VAR", "1234567891234567891234");
-  EXPECT_DEATH_IF_SUPPORTED(
-      Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "VAR", 123),
-      ".*");
-}
-
-// Tests that ShouldRunTestOnShard() selects all tests
-// where there is 1 shard.
-TEST(ShouldRunTestOnShardTest, IsPartitionWhenThereIsOneShard) {
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 0));
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 1));
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 2));
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 3));
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 4));
-}
-
-class ShouldShardTest : public testing::Test {
- protected:
-  void SetUp() override {
-    index_var_ = GTEST_FLAG_PREFIX_UPPER_ "INDEX";
-    total_var_ = GTEST_FLAG_PREFIX_UPPER_ "TOTAL";
-  }
-
-  void TearDown() override {
-    SetEnv(index_var_, "");
-    SetEnv(total_var_, "");
-  }
-
-  const char* index_var_;
-  const char* total_var_;
-};
-
-// Tests that sharding is disabled if neither of the environment variables
-// are set.
-TEST_F(ShouldShardTest, ReturnsFalseWhenNeitherEnvVarIsSet) {
-  SetEnv(index_var_, "");
-  SetEnv(total_var_, "");
-
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-}
-
-// Tests that sharding is not enabled if total_shards  == 1.
-TEST_F(ShouldShardTest, ReturnsFalseWhenTotalShardIsOne) {
-  SetEnv(index_var_, "0");
-  SetEnv(total_var_, "1");
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-}
-
-// Tests that sharding is enabled if total_shards > 1 and
-// we are not in a death test subprocess.
-// Environment variables are not supported on Windows CE.
-#if !GTEST_OS_WINDOWS_MOBILE
-TEST_F(ShouldShardTest, WorksWhenShardEnvVarsAreValid) {
-  SetEnv(index_var_, "4");
-  SetEnv(total_var_, "22");
-  EXPECT_TRUE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-
-  SetEnv(index_var_, "8");
-  SetEnv(total_var_, "9");
-  EXPECT_TRUE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-
-  SetEnv(index_var_, "0");
-  SetEnv(total_var_, "9");
-  EXPECT_TRUE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-}
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Tests that we exit in error if the sharding values are not valid.
-
-typedef ShouldShardTest ShouldShardDeathTest;
-
-TEST_F(ShouldShardDeathTest, AbortsWhenShardingEnvVarsAreInvalid) {
-  SetEnv(index_var_, "4");
-  SetEnv(total_var_, "4");
-  EXPECT_DEATH_IF_SUPPORTED(ShouldShard(total_var_, index_var_, false), ".*");
-
-  SetEnv(index_var_, "4");
-  SetEnv(total_var_, "-2");
-  EXPECT_DEATH_IF_SUPPORTED(ShouldShard(total_var_, index_var_, false), ".*");
-
-  SetEnv(index_var_, "5");
-  SetEnv(total_var_, "");
-  EXPECT_DEATH_IF_SUPPORTED(ShouldShard(total_var_, index_var_, false), ".*");
-
-  SetEnv(index_var_, "");
-  SetEnv(total_var_, "5");
-  EXPECT_DEATH_IF_SUPPORTED(ShouldShard(total_var_, index_var_, false), ".*");
-}
-
-// Tests that ShouldRunTestOnShard is a partition when 5
-// shards are used.
-TEST(ShouldRunTestOnShardTest, IsPartitionWhenThereAreFiveShards) {
-  // Choose an arbitrary number of tests and shards.
-  const int num_tests = 17;
-  const int num_shards = 5;
-
-  // Check partitioning: each test should be on exactly 1 shard.
-  for (int test_id = 0; test_id < num_tests; test_id++) {
-    int prev_selected_shard_index = -1;
-    for (int shard_index = 0; shard_index < num_shards; shard_index++) {
-      if (ShouldRunTestOnShard(num_shards, shard_index, test_id)) {
-        if (prev_selected_shard_index < 0) {
-          prev_selected_shard_index = shard_index;
-        } else {
-          ADD_FAILURE() << "Shard " << prev_selected_shard_index << " and "
-            << shard_index << " are both selected to run test " << test_id;
-        }
-      }
-    }
-  }
-
-  // Check balance: This is not required by the sharding protocol, but is a
-  // desirable property for performance.
-  for (int shard_index = 0; shard_index < num_shards; shard_index++) {
-    int num_tests_on_shard = 0;
-    for (int test_id = 0; test_id < num_tests; test_id++) {
-      num_tests_on_shard +=
-        ShouldRunTestOnShard(num_shards, shard_index, test_id);
-    }
-    EXPECT_GE(num_tests_on_shard, num_tests / num_shards);
-  }
-}
-
-// For the same reason we are not explicitly testing everything in the
-// Test class, there are no separate tests for the following classes
-// (except for some trivial cases):
-//
-//   TestSuite, UnitTest, UnitTestResultPrinter.
-//
-// Similarly, there are no separate tests for the following macros:
-//
-//   TEST, TEST_F, RUN_ALL_TESTS
-
-TEST(UnitTestTest, CanGetOriginalWorkingDir) {
-  ASSERT_TRUE(UnitTest::GetInstance()->original_working_dir() != nullptr);
-  EXPECT_STRNE(UnitTest::GetInstance()->original_working_dir(), "");
-}
-
-TEST(UnitTestTest, ReturnsPlausibleTimestamp) {
-  EXPECT_LT(0, UnitTest::GetInstance()->start_timestamp());
-  EXPECT_LE(UnitTest::GetInstance()->start_timestamp(), GetTimeInMillis());
-}
-
-// When a property using a reserved key is supplied to this function, it
-// tests that a non-fatal failure is added, a fatal failure is not added,
-// and that the property is not recorded.
-void ExpectNonFatalFailureRecordingPropertyWithReservedKey(
-    const TestResult& test_result, const char* key) {
-  EXPECT_NONFATAL_FAILURE(Test::RecordProperty(key, "1"), "Reserved key");
-  ASSERT_EQ(0, test_result.test_property_count()) << "Property for key '" << key
-                                                  << "' recorded unexpectedly.";
-}
-
-void ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-    const char* key) {
-  const TestInfo* test_info = UnitTest::GetInstance()->current_test_info();
-  ASSERT_TRUE(test_info != nullptr);
-  ExpectNonFatalFailureRecordingPropertyWithReservedKey(*test_info->result(),
-                                                        key);
-}
-
-void ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-    const char* key) {
-  const testing::TestSuite* test_suite =
-      UnitTest::GetInstance()->current_test_suite();
-  ASSERT_TRUE(test_suite != nullptr);
-  ExpectNonFatalFailureRecordingPropertyWithReservedKey(
-      test_suite->ad_hoc_test_result(), key);
-}
-
-void ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-    const char* key) {
-  ExpectNonFatalFailureRecordingPropertyWithReservedKey(
-      UnitTest::GetInstance()->ad_hoc_test_result(), key);
-}
-
-// Tests that property recording functions in UnitTest outside of tests
-// functions correcly.  Creating a separate instance of UnitTest ensures it
-// is in a state similar to the UnitTest's singleton's between tests.
-class UnitTestRecordPropertyTest :
-    public testing::internal::UnitTestRecordPropertyTestHelper {
- public:
-  static void SetUpTestSuite() {
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "disabled");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "errors");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "failures");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "name");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "tests");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "time");
-
-    Test::RecordProperty("test_case_key_1", "1");
-
-    const testing::TestSuite* test_suite =
-        UnitTest::GetInstance()->current_test_suite();
-
-    ASSERT_TRUE(test_suite != nullptr);
-
-    ASSERT_EQ(1, test_suite->ad_hoc_test_result().test_property_count());
-    EXPECT_STREQ("test_case_key_1",
-                 test_suite->ad_hoc_test_result().GetTestProperty(0).key());
-    EXPECT_STREQ("1",
-                 test_suite->ad_hoc_test_result().GetTestProperty(0).value());
-  }
-};
-
-// Tests TestResult has the expected property when added.
-TEST_F(UnitTestRecordPropertyTest, OnePropertyFoundWhenAdded) {
-  UnitTestRecordProperty("key_1", "1");
-
-  ASSERT_EQ(1, unit_test_.ad_hoc_test_result().test_property_count());
-
-  EXPECT_STREQ("key_1",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).key());
-  EXPECT_STREQ("1",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).value());
-}
-
-// Tests TestResult has multiple properties when added.
-TEST_F(UnitTestRecordPropertyTest, MultiplePropertiesFoundWhenAdded) {
-  UnitTestRecordProperty("key_1", "1");
-  UnitTestRecordProperty("key_2", "2");
-
-  ASSERT_EQ(2, unit_test_.ad_hoc_test_result().test_property_count());
-
-  EXPECT_STREQ("key_1",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).key());
-  EXPECT_STREQ("1", unit_test_.ad_hoc_test_result().GetTestProperty(0).value());
-
-  EXPECT_STREQ("key_2",
-               unit_test_.ad_hoc_test_result().GetTestProperty(1).key());
-  EXPECT_STREQ("2", unit_test_.ad_hoc_test_result().GetTestProperty(1).value());
-}
-
-// Tests TestResult::RecordProperty() overrides values for duplicate keys.
-TEST_F(UnitTestRecordPropertyTest, OverridesValuesForDuplicateKeys) {
-  UnitTestRecordProperty("key_1", "1");
-  UnitTestRecordProperty("key_2", "2");
-  UnitTestRecordProperty("key_1", "12");
-  UnitTestRecordProperty("key_2", "22");
-
-  ASSERT_EQ(2, unit_test_.ad_hoc_test_result().test_property_count());
-
-  EXPECT_STREQ("key_1",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).key());
-  EXPECT_STREQ("12",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).value());
-
-  EXPECT_STREQ("key_2",
-               unit_test_.ad_hoc_test_result().GetTestProperty(1).key());
-  EXPECT_STREQ("22",
-               unit_test_.ad_hoc_test_result().GetTestProperty(1).value());
-}
-
-TEST_F(UnitTestRecordPropertyTest,
-       AddFailureInsideTestsWhenUsingTestSuiteReservedKeys) {
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "name");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "value_param");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "type_param");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "status");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "time");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "classname");
-}
-
-TEST_F(UnitTestRecordPropertyTest,
-       AddRecordWithReservedKeysGeneratesCorrectPropertyList) {
-  EXPECT_NONFATAL_FAILURE(
-      Test::RecordProperty("name", "1"),
-      "'classname', 'name', 'status', 'time', 'type_param', 'value_param',"
-      " 'file', and 'line' are reserved");
-}
-
-class UnitTestRecordPropertyTestEnvironment : public Environment {
- public:
-  void TearDown() override {
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "tests");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "failures");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "disabled");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "errors");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "name");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "timestamp");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "time");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "random_seed");
-  }
-};
-
-// This will test property recording outside of any test or test case.
-static Environment* record_property_env GTEST_ATTRIBUTE_UNUSED_ =
-    AddGlobalTestEnvironment(new UnitTestRecordPropertyTestEnvironment);
-
-// This group of tests is for predicate assertions (ASSERT_PRED*, etc)
-// of various arities.  They do not attempt to be exhaustive.  Rather,
-// view them as smoke tests that can be easily reviewed and verified.
-// A more complete set of tests for predicate assertions can be found
-// in gtest_pred_impl_unittest.cc.
-
-// First, some predicates and predicate-formatters needed by the tests.
-
-// Returns true if and only if the argument is an even number.
-bool IsEven(int n) {
-  return (n % 2) == 0;
-}
-
-// A functor that returns true if and only if the argument is an even number.
-struct IsEvenFunctor {
-  bool operator()(int n) { return IsEven(n); }
-};
-
-// A predicate-formatter function that asserts the argument is an even
-// number.
-AssertionResult AssertIsEven(const char* expr, int n) {
-  if (IsEven(n)) {
-    return AssertionSuccess();
-  }
-
-  Message msg;
-  msg << expr << " evaluates to " << n << ", which is not even.";
-  return AssertionFailure(msg);
-}
-
-// A predicate function that returns AssertionResult for use in
-// EXPECT/ASSERT_TRUE/FALSE.
-AssertionResult ResultIsEven(int n) {
-  if (IsEven(n))
-    return AssertionSuccess() << n << " is even";
-  else
-    return AssertionFailure() << n << " is odd";
-}
-
-// A predicate function that returns AssertionResult but gives no
-// explanation why it succeeds. Needed for testing that
-// EXPECT/ASSERT_FALSE handles such functions correctly.
-AssertionResult ResultIsEvenNoExplanation(int n) {
-  if (IsEven(n))
-    return AssertionSuccess();
-  else
-    return AssertionFailure() << n << " is odd";
-}
-
-// A predicate-formatter functor that asserts the argument is an even
-// number.
-struct AssertIsEvenFunctor {
-  AssertionResult operator()(const char* expr, int n) {
-    return AssertIsEven(expr, n);
-  }
-};
-
-// Returns true if and only if the sum of the arguments is an even number.
-bool SumIsEven2(int n1, int n2) {
-  return IsEven(n1 + n2);
-}
-
-// A functor that returns true if and only if the sum of the arguments is an
-// even number.
-struct SumIsEven3Functor {
-  bool operator()(int n1, int n2, int n3) {
-    return IsEven(n1 + n2 + n3);
-  }
-};
-
-// A predicate-formatter function that asserts the sum of the
-// arguments is an even number.
-AssertionResult AssertSumIsEven4(
-    const char* e1, const char* e2, const char* e3, const char* e4,
-    int n1, int n2, int n3, int n4) {
-  const int sum = n1 + n2 + n3 + n4;
-  if (IsEven(sum)) {
-    return AssertionSuccess();
-  }
-
-  Message msg;
-  msg << e1 << " + " << e2 << " + " << e3 << " + " << e4
-      << " (" << n1 << " + " << n2 << " + " << n3 << " + " << n4
-      << ") evaluates to " << sum << ", which is not even.";
-  return AssertionFailure(msg);
-}
-
-// A predicate-formatter functor that asserts the sum of the arguments
-// is an even number.
-struct AssertSumIsEven5Functor {
-  AssertionResult operator()(
-      const char* e1, const char* e2, const char* e3, const char* e4,
-      const char* e5, int n1, int n2, int n3, int n4, int n5) {
-    const int sum = n1 + n2 + n3 + n4 + n5;
-    if (IsEven(sum)) {
-      return AssertionSuccess();
-    }
-
-    Message msg;
-    msg << e1 << " + " << e2 << " + " << e3 << " + " << e4 << " + " << e5
-        << " ("
-        << n1 << " + " << n2 << " + " << n3 << " + " << n4 << " + " << n5
-        << ") evaluates to " << sum << ", which is not even.";
-    return AssertionFailure(msg);
-  }
-};
-
-
-// Tests unary predicate assertions.
-
-// Tests unary predicate assertions that don't use a custom formatter.
-TEST(Pred1Test, WithoutFormat) {
-  // Success cases.
-  EXPECT_PRED1(IsEvenFunctor(), 2) << "This failure is UNEXPECTED!";
-  ASSERT_PRED1(IsEven, 4);
-
-  // Failure cases.
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(IsEven, 5) << "This failure is expected.";
-  }, "This failure is expected.");
-  EXPECT_FATAL_FAILURE(ASSERT_PRED1(IsEvenFunctor(), 5),
-                       "evaluates to false");
-}
-
-// Tests unary predicate assertions that use a custom formatter.
-TEST(Pred1Test, WithFormat) {
-  // Success cases.
-  EXPECT_PRED_FORMAT1(AssertIsEven, 2);
-  ASSERT_PRED_FORMAT1(AssertIsEvenFunctor(), 4)
-    << "This failure is UNEXPECTED!";
-
-  // Failure cases.
-  const int n = 5;
-  EXPECT_NONFATAL_FAILURE(EXPECT_PRED_FORMAT1(AssertIsEvenFunctor(), n),
-                          "n evaluates to 5, which is not even.");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(AssertIsEven, 5) << "This failure is expected.";
-  }, "This failure is expected.");
-}
-
-// Tests that unary predicate assertions evaluates their arguments
-// exactly once.
-TEST(Pred1Test, SingleEvaluationOnFailure) {
-  // A success case.
-  static int n = 0;
-  EXPECT_PRED1(IsEven, n++);
-  EXPECT_EQ(1, n) << "The argument is not evaluated exactly once.";
-
-  // A failure case.
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(AssertIsEvenFunctor(), n++)
-        << "This failure is expected.";
-  }, "This failure is expected.");
-  EXPECT_EQ(2, n) << "The argument is not evaluated exactly once.";
-}
-
-
-// Tests predicate assertions whose arity is >= 2.
-
-// Tests predicate assertions that don't use a custom formatter.
-TEST(PredTest, WithoutFormat) {
-  // Success cases.
-  ASSERT_PRED2(SumIsEven2, 2, 4) << "This failure is UNEXPECTED!";
-  EXPECT_PRED3(SumIsEven3Functor(), 4, 6, 8);
-
-  // Failure cases.
-  const int n1 = 1;
-  const int n2 = 2;
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(SumIsEven2, n1, n2) << "This failure is expected.";
-  }, "This failure is expected.");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(SumIsEven3Functor(), 1, 2, 4);
-  }, "evaluates to false");
-}
-
-// Tests predicate assertions that use a custom formatter.
-TEST(PredTest, WithFormat) {
-  // Success cases.
-  ASSERT_PRED_FORMAT4(AssertSumIsEven4, 4, 6, 8, 10) <<
-    "This failure is UNEXPECTED!";
-  EXPECT_PRED_FORMAT5(AssertSumIsEven5Functor(), 2, 4, 6, 8, 10);
-
-  // Failure cases.
-  const int n1 = 1;
-  const int n2 = 2;
-  const int n3 = 4;
-  const int n4 = 6;
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(AssertSumIsEven4, n1, n2, n3, n4);
-  }, "evaluates to 13, which is not even.");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(AssertSumIsEven5Functor(), 1, 2, 4, 6, 8)
-        << "This failure is expected.";
-  }, "This failure is expected.");
-}
-
-// Tests that predicate assertions evaluates their arguments
-// exactly once.
-TEST(PredTest, SingleEvaluationOnFailure) {
-  // A success case.
-  int n1 = 0;
-  int n2 = 0;
-  EXPECT_PRED2(SumIsEven2, n1++, n2++);
-  EXPECT_EQ(1, n1) << "Argument 1 is not evaluated exactly once.";
-  EXPECT_EQ(1, n2) << "Argument 2 is not evaluated exactly once.";
-
-  // Another success case.
-  n1 = n2 = 0;
-  int n3 = 0;
-  int n4 = 0;
-  int n5 = 0;
-  ASSERT_PRED_FORMAT5(AssertSumIsEven5Functor(),
-                      n1++, n2++, n3++, n4++, n5++)
-                        << "This failure is UNEXPECTED!";
-  EXPECT_EQ(1, n1) << "Argument 1 is not evaluated exactly once.";
-  EXPECT_EQ(1, n2) << "Argument 2 is not evaluated exactly once.";
-  EXPECT_EQ(1, n3) << "Argument 3 is not evaluated exactly once.";
-  EXPECT_EQ(1, n4) << "Argument 4 is not evaluated exactly once.";
-  EXPECT_EQ(1, n5) << "Argument 5 is not evaluated exactly once.";
-
-  // A failure case.
-  n1 = n2 = n3 = 0;
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(SumIsEven3Functor(), ++n1, n2++, n3++)
-        << "This failure is expected.";
-  }, "This failure is expected.");
-  EXPECT_EQ(1, n1) << "Argument 1 is not evaluated exactly once.";
-  EXPECT_EQ(1, n2) << "Argument 2 is not evaluated exactly once.";
-  EXPECT_EQ(1, n3) << "Argument 3 is not evaluated exactly once.";
-
-  // Another failure case.
-  n1 = n2 = n3 = n4 = 0;
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(AssertSumIsEven4, ++n1, n2++, n3++, n4++);
-  }, "evaluates to 1, which is not even.");
-  EXPECT_EQ(1, n1) << "Argument 1 is not evaluated exactly once.";
-  EXPECT_EQ(1, n2) << "Argument 2 is not evaluated exactly once.";
-  EXPECT_EQ(1, n3) << "Argument 3 is not evaluated exactly once.";
-  EXPECT_EQ(1, n4) << "Argument 4 is not evaluated exactly once.";
-}
-
-// Test predicate assertions for sets
-TEST(PredTest, ExpectPredEvalFailure) {
-  std::set<int> set_a = {2, 1, 3, 4, 5};
-  std::set<int> set_b = {0, 4, 8};
-  const auto compare_sets = [] (std::set<int>, std::set<int>) { return false; };
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_PRED2(compare_sets, set_a, set_b),
-      "compare_sets(set_a, set_b) evaluates to false, where\nset_a evaluates "
-      "to { 1, 2, 3, 4, 5 }\nset_b evaluates to { 0, 4, 8 }");
-}
-
-// Some helper functions for testing using overloaded/template
-// functions with ASSERT_PREDn and EXPECT_PREDn.
-
-bool IsPositive(double x) {
-  return x > 0;
-}
-
-template <typename T>
-bool IsNegative(T x) {
-  return x < 0;
-}
-
-template <typename T1, typename T2>
-bool GreaterThan(T1 x1, T2 x2) {
-  return x1 > x2;
-}
-
-// Tests that overloaded functions can be used in *_PRED* as long as
-// their types are explicitly specified.
-TEST(PredicateAssertionTest, AcceptsOverloadedFunction) {
-  // C++Builder requires C-style casts rather than static_cast.
-  EXPECT_PRED1((bool (*)(int))(IsPositive), 5);  // NOLINT
-  ASSERT_PRED1((bool (*)(double))(IsPositive), 6.0);  // NOLINT
-}
-
-// Tests that template functions can be used in *_PRED* as long as
-// their types are explicitly specified.
-TEST(PredicateAssertionTest, AcceptsTemplateFunction) {
-  EXPECT_PRED1(IsNegative<int>, -5);
-  // Makes sure that we can handle templates with more than one
-  // parameter.
-  ASSERT_PRED2((GreaterThan<int, int>), 5, 0);
-}
-
-
-// Some helper functions for testing using overloaded/template
-// functions with ASSERT_PRED_FORMATn and EXPECT_PRED_FORMATn.
-
-AssertionResult IsPositiveFormat(const char* /* expr */, int n) {
-  return n > 0 ? AssertionSuccess() :
-      AssertionFailure(Message() << "Failure");
-}
-
-AssertionResult IsPositiveFormat(const char* /* expr */, double x) {
-  return x > 0 ? AssertionSuccess() :
-      AssertionFailure(Message() << "Failure");
-}
-
-template <typename T>
-AssertionResult IsNegativeFormat(const char* /* expr */, T x) {
-  return x < 0 ? AssertionSuccess() :
-      AssertionFailure(Message() << "Failure");
-}
-
-template <typename T1, typename T2>
-AssertionResult EqualsFormat(const char* /* expr1 */, const char* /* expr2 */,
-                             const T1& x1, const T2& x2) {
-  return x1 == x2 ? AssertionSuccess() :
-      AssertionFailure(Message() << "Failure");
-}
-
-// Tests that overloaded functions can be used in *_PRED_FORMAT*
-// without explicitly specifying their types.
-TEST(PredicateFormatAssertionTest, AcceptsOverloadedFunction) {
-  EXPECT_PRED_FORMAT1(IsPositiveFormat, 5);
-  ASSERT_PRED_FORMAT1(IsPositiveFormat, 6.0);
-}
-
-// Tests that template functions can be used in *_PRED_FORMAT* without
-// explicitly specifying their types.
-TEST(PredicateFormatAssertionTest, AcceptsTemplateFunction) {
-  EXPECT_PRED_FORMAT1(IsNegativeFormat, -5);
-  ASSERT_PRED_FORMAT2(EqualsFormat, 3, 3);
-}
-
-
-// Tests string assertions.
-
-// Tests ASSERT_STREQ with non-NULL arguments.
-TEST(StringAssertionTest, ASSERT_STREQ) {
-  const char * const p1 = "good";
-  ASSERT_STREQ(p1, p1);
-
-  // Let p2 have the same content as p1, but be at a different address.
-  const char p2[] = "good";
-  ASSERT_STREQ(p1, p2);
-
-  EXPECT_FATAL_FAILURE(ASSERT_STREQ("bad", "good"),
-                       "  \"bad\"\n  \"good\"");
-}
-
-// Tests ASSERT_STREQ with NULL arguments.
-TEST(StringAssertionTest, ASSERT_STREQ_Null) {
-  ASSERT_STREQ(static_cast<const char*>(nullptr), nullptr);
-  EXPECT_FATAL_FAILURE(ASSERT_STREQ(nullptr, "non-null"), "non-null");
-}
-
-// Tests ASSERT_STREQ with NULL arguments.
-TEST(StringAssertionTest, ASSERT_STREQ_Null2) {
-  EXPECT_FATAL_FAILURE(ASSERT_STREQ("non-null", nullptr), "non-null");
-}
-
-// Tests ASSERT_STRNE.
-TEST(StringAssertionTest, ASSERT_STRNE) {
-  ASSERT_STRNE("hi", "Hi");
-  ASSERT_STRNE("Hi", nullptr);
-  ASSERT_STRNE(nullptr, "Hi");
-  ASSERT_STRNE("", nullptr);
-  ASSERT_STRNE(nullptr, "");
-  ASSERT_STRNE("", "Hi");
-  ASSERT_STRNE("Hi", "");
-  EXPECT_FATAL_FAILURE(ASSERT_STRNE("Hi", "Hi"),
-                       "\"Hi\" vs \"Hi\"");
-}
-
-// Tests ASSERT_STRCASEEQ.
-TEST(StringAssertionTest, ASSERT_STRCASEEQ) {
-  ASSERT_STRCASEEQ("hi", "Hi");
-  ASSERT_STRCASEEQ(static_cast<const char*>(nullptr), nullptr);
-
-  ASSERT_STRCASEEQ("", "");
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASEEQ("Hi", "hi2"),
-                       "Ignoring case");
-}
-
-// Tests ASSERT_STRCASENE.
-TEST(StringAssertionTest, ASSERT_STRCASENE) {
-  ASSERT_STRCASENE("hi1", "Hi2");
-  ASSERT_STRCASENE("Hi", nullptr);
-  ASSERT_STRCASENE(nullptr, "Hi");
-  ASSERT_STRCASENE("", nullptr);
-  ASSERT_STRCASENE(nullptr, "");
-  ASSERT_STRCASENE("", "Hi");
-  ASSERT_STRCASENE("Hi", "");
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASENE("Hi", "hi"),
-                       "(ignoring case)");
-}
-
-// Tests *_STREQ on wide strings.
-TEST(StringAssertionTest, STREQ_Wide) {
-  // NULL strings.
-  ASSERT_STREQ(static_cast<const wchar_t*>(nullptr), nullptr);
-
-  // Empty strings.
-  ASSERT_STREQ(L"", L"");
-
-  // Non-null vs NULL.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STREQ(L"non-null", nullptr), "non-null");
-
-  // Equal strings.
-  EXPECT_STREQ(L"Hi", L"Hi");
-
-  // Unequal strings.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STREQ(L"abc", L"Abc"),
-                          "Abc");
-
-  // Strings containing wide characters.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STREQ(L"abc\x8119", L"abc\x8120"),
-                          "abc");
-
-  // The streaming variation.
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_STREQ(L"abc\x8119", L"abc\x8121") << "Expected failure";
-  }, "Expected failure");
-}
-
-// Tests *_STRNE on wide strings.
-TEST(StringAssertionTest, STRNE_Wide) {
-  // NULL strings.
-  EXPECT_NONFATAL_FAILURE(
-      {  // NOLINT
-        EXPECT_STRNE(static_cast<const wchar_t*>(nullptr), nullptr);
-      },
-      "");
-
-  // Empty strings.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE(L"", L""),
-                          "L\"\"");
-
-  // Non-null vs NULL.
-  ASSERT_STRNE(L"non-null", nullptr);
-
-  // Equal strings.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE(L"Hi", L"Hi"),
-                          "L\"Hi\"");
-
-  // Unequal strings.
-  EXPECT_STRNE(L"abc", L"Abc");
-
-  // Strings containing wide characters.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE(L"abc\x8119", L"abc\x8119"),
-                          "abc");
-
-  // The streaming variation.
-  ASSERT_STRNE(L"abc\x8119", L"abc\x8120") << "This shouldn't happen";
-}
-
-// Tests for ::testing::IsSubstring().
-
-// Tests that IsSubstring() returns the correct result when the input
-// argument type is const char*.
-TEST(IsSubstringTest, ReturnsCorrectResultForCString) {
-  EXPECT_FALSE(IsSubstring("", "", nullptr, "a"));
-  EXPECT_FALSE(IsSubstring("", "", "b", nullptr));
-  EXPECT_FALSE(IsSubstring("", "", "needle", "haystack"));
-
-  EXPECT_TRUE(IsSubstring("", "", static_cast<const char*>(nullptr), nullptr));
-  EXPECT_TRUE(IsSubstring("", "", "needle", "two needles"));
-}
-
-// Tests that IsSubstring() returns the correct result when the input
-// argument type is const wchar_t*.
-TEST(IsSubstringTest, ReturnsCorrectResultForWideCString) {
-  EXPECT_FALSE(IsSubstring("", "", kNull, L"a"));
-  EXPECT_FALSE(IsSubstring("", "", L"b", kNull));
-  EXPECT_FALSE(IsSubstring("", "", L"needle", L"haystack"));
-
-  EXPECT_TRUE(
-      IsSubstring("", "", static_cast<const wchar_t*>(nullptr), nullptr));
-  EXPECT_TRUE(IsSubstring("", "", L"needle", L"two needles"));
-}
-
-// Tests that IsSubstring() generates the correct message when the input
-// argument type is const char*.
-TEST(IsSubstringTest, GeneratesCorrectMessageForCString) {
-  EXPECT_STREQ("Value of: needle_expr\n"
-               "  Actual: \"needle\"\n"
-               "Expected: a substring of haystack_expr\n"
-               "Which is: \"haystack\"",
-               IsSubstring("needle_expr", "haystack_expr",
-                           "needle", "haystack").failure_message());
-}
-
-// Tests that IsSubstring returns the correct result when the input
-// argument type is ::std::string.
-TEST(IsSubstringTest, ReturnsCorrectResultsForStdString) {
-  EXPECT_TRUE(IsSubstring("", "", std::string("hello"), "ahellob"));
-  EXPECT_FALSE(IsSubstring("", "", "hello", std::string("world")));
-}
-
-#if GTEST_HAS_STD_WSTRING
-// Tests that IsSubstring returns the correct result when the input
-// argument type is ::std::wstring.
-TEST(IsSubstringTest, ReturnsCorrectResultForStdWstring) {
-  EXPECT_TRUE(IsSubstring("", "", ::std::wstring(L"needle"), L"two needles"));
-  EXPECT_FALSE(IsSubstring("", "", L"needle", ::std::wstring(L"haystack")));
-}
-
-// Tests that IsSubstring() generates the correct message when the input
-// argument type is ::std::wstring.
-TEST(IsSubstringTest, GeneratesCorrectMessageForWstring) {
-  EXPECT_STREQ("Value of: needle_expr\n"
-               "  Actual: L\"needle\"\n"
-               "Expected: a substring of haystack_expr\n"
-               "Which is: L\"haystack\"",
-               IsSubstring(
-                   "needle_expr", "haystack_expr",
-                   ::std::wstring(L"needle"), L"haystack").failure_message());
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Tests for ::testing::IsNotSubstring().
-
-// Tests that IsNotSubstring() returns the correct result when the input
-// argument type is const char*.
-TEST(IsNotSubstringTest, ReturnsCorrectResultForCString) {
-  EXPECT_TRUE(IsNotSubstring("", "", "needle", "haystack"));
-  EXPECT_FALSE(IsNotSubstring("", "", "needle", "two needles"));
-}
-
-// Tests that IsNotSubstring() returns the correct result when the input
-// argument type is const wchar_t*.
-TEST(IsNotSubstringTest, ReturnsCorrectResultForWideCString) {
-  EXPECT_TRUE(IsNotSubstring("", "", L"needle", L"haystack"));
-  EXPECT_FALSE(IsNotSubstring("", "", L"needle", L"two needles"));
-}
-
-// Tests that IsNotSubstring() generates the correct message when the input
-// argument type is const wchar_t*.
-TEST(IsNotSubstringTest, GeneratesCorrectMessageForWideCString) {
-  EXPECT_STREQ("Value of: needle_expr\n"
-               "  Actual: L\"needle\"\n"
-               "Expected: not a substring of haystack_expr\n"
-               "Which is: L\"two needles\"",
-               IsNotSubstring(
-                   "needle_expr", "haystack_expr",
-                   L"needle", L"two needles").failure_message());
-}
-
-// Tests that IsNotSubstring returns the correct result when the input
-// argument type is ::std::string.
-TEST(IsNotSubstringTest, ReturnsCorrectResultsForStdString) {
-  EXPECT_FALSE(IsNotSubstring("", "", std::string("hello"), "ahellob"));
-  EXPECT_TRUE(IsNotSubstring("", "", "hello", std::string("world")));
-}
-
-// Tests that IsNotSubstring() generates the correct message when the input
-// argument type is ::std::string.
-TEST(IsNotSubstringTest, GeneratesCorrectMessageForStdString) {
-  EXPECT_STREQ("Value of: needle_expr\n"
-               "  Actual: \"needle\"\n"
-               "Expected: not a substring of haystack_expr\n"
-               "Which is: \"two needles\"",
-               IsNotSubstring(
-                   "needle_expr", "haystack_expr",
-                   ::std::string("needle"), "two needles").failure_message());
-}
-
-#if GTEST_HAS_STD_WSTRING
-
-// Tests that IsNotSubstring returns the correct result when the input
-// argument type is ::std::wstring.
-TEST(IsNotSubstringTest, ReturnsCorrectResultForStdWstring) {
-  EXPECT_FALSE(
-      IsNotSubstring("", "", ::std::wstring(L"needle"), L"two needles"));
-  EXPECT_TRUE(IsNotSubstring("", "", L"needle", ::std::wstring(L"haystack")));
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Tests floating-point assertions.
-
-template <typename RawType>
-class FloatingPointTest : public Test {
- protected:
-  // Pre-calculated numbers to be used by the tests.
-  struct TestValues {
-    RawType close_to_positive_zero;
-    RawType close_to_negative_zero;
-    RawType further_from_negative_zero;
-
-    RawType close_to_one;
-    RawType further_from_one;
-
-    RawType infinity;
-    RawType close_to_infinity;
-    RawType further_from_infinity;
-
-    RawType nan1;
-    RawType nan2;
-  };
-
-  typedef typename testing::internal::FloatingPoint<RawType> Floating;
-  typedef typename Floating::Bits Bits;
-
-  void SetUp() override {
-    const size_t max_ulps = Floating::kMaxUlps;
-
-    // The bits that represent 0.0.
-    const Bits zero_bits = Floating(0).bits();
-
-    // Makes some numbers close to 0.0.
-    values_.close_to_positive_zero = Floating::ReinterpretBits(
-        zero_bits + max_ulps/2);
-    values_.close_to_negative_zero = -Floating::ReinterpretBits(
-        zero_bits + max_ulps - max_ulps/2);
-    values_.further_from_negative_zero = -Floating::ReinterpretBits(
-        zero_bits + max_ulps + 1 - max_ulps/2);
-
-    // The bits that represent 1.0.
-    const Bits one_bits = Floating(1).bits();
-
-    // Makes some numbers close to 1.0.
-    values_.close_to_one = Floating::ReinterpretBits(one_bits + max_ulps);
-    values_.further_from_one = Floating::ReinterpretBits(
-        one_bits + max_ulps + 1);
-
-    // +infinity.
-    values_.infinity = Floating::Infinity();
-
-    // The bits that represent +infinity.
-    const Bits infinity_bits = Floating(values_.infinity).bits();
-
-    // Makes some numbers close to infinity.
-    values_.close_to_infinity = Floating::ReinterpretBits(
-        infinity_bits - max_ulps);
-    values_.further_from_infinity = Floating::ReinterpretBits(
-        infinity_bits - max_ulps - 1);
-
-    // Makes some NAN's.  Sets the most significant bit of the fraction so that
-    // our NaN's are quiet; trying to process a signaling NaN would raise an
-    // exception if our environment enables floating point exceptions.
-    values_.nan1 = Floating::ReinterpretBits(Floating::kExponentBitMask
-        | (static_cast<Bits>(1) << (Floating::kFractionBitCount - 1)) | 1);
-    values_.nan2 = Floating::ReinterpretBits(Floating::kExponentBitMask
-        | (static_cast<Bits>(1) << (Floating::kFractionBitCount - 1)) | 200);
-  }
-
-  void TestSize() {
-    EXPECT_EQ(sizeof(RawType), sizeof(Bits));
-  }
-
-  static TestValues values_;
-};
-
-template <typename RawType>
-typename FloatingPointTest<RawType>::TestValues
-    FloatingPointTest<RawType>::values_;
-
-// Instantiates FloatingPointTest for testing *_FLOAT_EQ.
-typedef FloatingPointTest<float> FloatTest;
-
-// Tests that the size of Float::Bits matches the size of float.
-TEST_F(FloatTest, Size) {
-  TestSize();
-}
-
-// Tests comparing with +0 and -0.
-TEST_F(FloatTest, Zeros) {
-  EXPECT_FLOAT_EQ(0.0, -0.0);
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(-0.0, 1.0),
-                          "1.0");
-  EXPECT_FATAL_FAILURE(ASSERT_FLOAT_EQ(0.0, 1.5),
-                       "1.5");
-}
-
-// Tests comparing numbers close to 0.
-//
-// This ensures that *_FLOAT_EQ handles the sign correctly and no
-// overflow occurs when comparing numbers whose absolute value is very
-// small.
-TEST_F(FloatTest, AlmostZeros) {
-  // In C++Builder, names within local classes (such as used by
-  // EXPECT_FATAL_FAILURE) cannot be resolved against static members of the
-  // scoping class.  Use a static local alias as a workaround.
-  // We use the assignment syntax since some compilers, like Sun Studio,
-  // don't allow initializing references using construction syntax
-  // (parentheses).
-  static const FloatTest::TestValues& v = this->values_;
-
-  EXPECT_FLOAT_EQ(0.0, v.close_to_positive_zero);
-  EXPECT_FLOAT_EQ(-0.0, v.close_to_negative_zero);
-  EXPECT_FLOAT_EQ(v.close_to_positive_zero, v.close_to_negative_zero);
-
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_FLOAT_EQ(v.close_to_positive_zero,
-                    v.further_from_negative_zero);
-  }, "v.further_from_negative_zero");
-}
-
-// Tests comparing numbers close to each other.
-TEST_F(FloatTest, SmallDiff) {
-  EXPECT_FLOAT_EQ(1.0, values_.close_to_one);
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(1.0, values_.further_from_one),
-                          "values_.further_from_one");
-}
-
-// Tests comparing numbers far apart.
-TEST_F(FloatTest, LargeDiff) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(2.5, 3.0),
-                          "3.0");
-}
-
-// Tests comparing with infinity.
-//
-// This ensures that no overflow occurs when comparing numbers whose
-// absolute value is very large.
-TEST_F(FloatTest, Infinity) {
-  EXPECT_FLOAT_EQ(values_.infinity, values_.close_to_infinity);
-  EXPECT_FLOAT_EQ(-values_.infinity, -values_.close_to_infinity);
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(values_.infinity, -values_.infinity),
-                          "-values_.infinity");
-
-  // This is interesting as the representations of infinity and nan1
-  // are only 1 DLP apart.
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(values_.infinity, values_.nan1),
-                          "values_.nan1");
-}
-
-// Tests that comparing with NAN always returns false.
-TEST_F(FloatTest, NaN) {
-  // In C++Builder, names within local classes (such as used by
-  // EXPECT_FATAL_FAILURE) cannot be resolved against static members of the
-  // scoping class.  Use a static local alias as a workaround.
-  // We use the assignment syntax since some compilers, like Sun Studio,
-  // don't allow initializing references using construction syntax
-  // (parentheses).
-  static const FloatTest::TestValues& v = this->values_;
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(v.nan1, v.nan1),
-                          "v.nan1");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(v.nan1, v.nan2),
-                          "v.nan2");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(1.0, v.nan1),
-                          "v.nan1");
-
-  EXPECT_FATAL_FAILURE(ASSERT_FLOAT_EQ(v.nan1, v.infinity),
-                       "v.infinity");
-}
-
-// Tests that *_FLOAT_EQ are reflexive.
-TEST_F(FloatTest, Reflexive) {
-  EXPECT_FLOAT_EQ(0.0, 0.0);
-  EXPECT_FLOAT_EQ(1.0, 1.0);
-  ASSERT_FLOAT_EQ(values_.infinity, values_.infinity);
-}
-
-// Tests that *_FLOAT_EQ are commutative.
-TEST_F(FloatTest, Commutative) {
-  // We already tested EXPECT_FLOAT_EQ(1.0, values_.close_to_one).
-  EXPECT_FLOAT_EQ(values_.close_to_one, 1.0);
-
-  // We already tested EXPECT_FLOAT_EQ(1.0, values_.further_from_one).
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(values_.further_from_one, 1.0),
-                          "1.0");
-}
-
-// Tests EXPECT_NEAR.
-TEST_F(FloatTest, EXPECT_NEAR) {
-  EXPECT_NEAR(-1.0f, -1.1f, 0.2f);
-  EXPECT_NEAR(2.0f, 3.0f, 1.0f);
-  EXPECT_NONFATAL_FAILURE(EXPECT_NEAR(1.0f,1.5f, 0.25f),  // NOLINT
-                          "The difference between 1.0f and 1.5f is 0.5, "
-                          "which exceeds 0.25f");
-  // To work around a bug in gcc 2.95.0, there is intentionally no
-  // space after the first comma in the previous line.
-}
-
-// Tests ASSERT_NEAR.
-TEST_F(FloatTest, ASSERT_NEAR) {
-  ASSERT_NEAR(-1.0f, -1.1f, 0.2f);
-  ASSERT_NEAR(2.0f, 3.0f, 1.0f);
-  EXPECT_FATAL_FAILURE(ASSERT_NEAR(1.0f,1.5f, 0.25f),  // NOLINT
-                       "The difference between 1.0f and 1.5f is 0.5, "
-                       "which exceeds 0.25f");
-  // To work around a bug in gcc 2.95.0, there is intentionally no
-  // space after the first comma in the previous line.
-}
-
-// Tests the cases where FloatLE() should succeed.
-TEST_F(FloatTest, FloatLESucceeds) {
-  EXPECT_PRED_FORMAT2(FloatLE, 1.0f, 2.0f);  // When val1 < val2,
-  ASSERT_PRED_FORMAT2(FloatLE, 1.0f, 1.0f);  // val1 == val2,
-
-  // or when val1 is greater than, but almost equals to, val2.
-  EXPECT_PRED_FORMAT2(FloatLE, values_.close_to_positive_zero, 0.0f);
-}
-
-// Tests the cases where FloatLE() should fail.
-TEST_F(FloatTest, FloatLEFails) {
-  // When val1 is greater than val2 by a large margin,
-  EXPECT_NONFATAL_FAILURE(EXPECT_PRED_FORMAT2(FloatLE, 2.0f, 1.0f),
-                          "(2.0f) <= (1.0f)");
-
-  // or by a small yet non-negligible margin,
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(FloatLE, values_.further_from_one, 1.0f);
-  }, "(values_.further_from_one) <= (1.0f)");
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(FloatLE, values_.nan1, values_.infinity);
-  }, "(values_.nan1) <= (values_.infinity)");
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(FloatLE, -values_.infinity, values_.nan1);
-  }, "(-values_.infinity) <= (values_.nan1)");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(FloatLE, values_.nan1, values_.nan1);
-  }, "(values_.nan1) <= (values_.nan1)");
-}
-
-// Instantiates FloatingPointTest for testing *_DOUBLE_EQ.
-typedef FloatingPointTest<double> DoubleTest;
-
-// Tests that the size of Double::Bits matches the size of double.
-TEST_F(DoubleTest, Size) {
-  TestSize();
-}
-
-// Tests comparing with +0 and -0.
-TEST_F(DoubleTest, Zeros) {
-  EXPECT_DOUBLE_EQ(0.0, -0.0);
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(-0.0, 1.0),
-                          "1.0");
-  EXPECT_FATAL_FAILURE(ASSERT_DOUBLE_EQ(0.0, 1.0),
-                       "1.0");
-}
-
-// Tests comparing numbers close to 0.
-//
-// This ensures that *_DOUBLE_EQ handles the sign correctly and no
-// overflow occurs when comparing numbers whose absolute value is very
-// small.
-TEST_F(DoubleTest, AlmostZeros) {
-  // In C++Builder, names within local classes (such as used by
-  // EXPECT_FATAL_FAILURE) cannot be resolved against static members of the
-  // scoping class.  Use a static local alias as a workaround.
-  // We use the assignment syntax since some compilers, like Sun Studio,
-  // don't allow initializing references using construction syntax
-  // (parentheses).
-  static const DoubleTest::TestValues& v = this->values_;
-
-  EXPECT_DOUBLE_EQ(0.0, v.close_to_positive_zero);
-  EXPECT_DOUBLE_EQ(-0.0, v.close_to_negative_zero);
-  EXPECT_DOUBLE_EQ(v.close_to_positive_zero, v.close_to_negative_zero);
-
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_DOUBLE_EQ(v.close_to_positive_zero,
-                     v.further_from_negative_zero);
-  }, "v.further_from_negative_zero");
-}
-
-// Tests comparing numbers close to each other.
-TEST_F(DoubleTest, SmallDiff) {
-  EXPECT_DOUBLE_EQ(1.0, values_.close_to_one);
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(1.0, values_.further_from_one),
-                          "values_.further_from_one");
-}
-
-// Tests comparing numbers far apart.
-TEST_F(DoubleTest, LargeDiff) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(2.0, 3.0),
-                          "3.0");
-}
-
-// Tests comparing with infinity.
-//
-// This ensures that no overflow occurs when comparing numbers whose
-// absolute value is very large.
-TEST_F(DoubleTest, Infinity) {
-  EXPECT_DOUBLE_EQ(values_.infinity, values_.close_to_infinity);
-  EXPECT_DOUBLE_EQ(-values_.infinity, -values_.close_to_infinity);
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(values_.infinity, -values_.infinity),
-                          "-values_.infinity");
-
-  // This is interesting as the representations of infinity_ and nan1_
-  // are only 1 DLP apart.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(values_.infinity, values_.nan1),
-                          "values_.nan1");
-}
-
-// Tests that comparing with NAN always returns false.
-TEST_F(DoubleTest, NaN) {
-  static const DoubleTest::TestValues& v = this->values_;
-
-  // Nokia's STLport crashes if we try to output infinity or NaN.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(v.nan1, v.nan1),
-                          "v.nan1");
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(v.nan1, v.nan2), "v.nan2");
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(1.0, v.nan1), "v.nan1");
-  EXPECT_FATAL_FAILURE(ASSERT_DOUBLE_EQ(v.nan1, v.infinity),
-                       "v.infinity");
-}
-
-// Tests that *_DOUBLE_EQ are reflexive.
-TEST_F(DoubleTest, Reflexive) {
-  EXPECT_DOUBLE_EQ(0.0, 0.0);
-  EXPECT_DOUBLE_EQ(1.0, 1.0);
-  ASSERT_DOUBLE_EQ(values_.infinity, values_.infinity);
-}
-
-// Tests that *_DOUBLE_EQ are commutative.
-TEST_F(DoubleTest, Commutative) {
-  // We already tested EXPECT_DOUBLE_EQ(1.0, values_.close_to_one).
-  EXPECT_DOUBLE_EQ(values_.close_to_one, 1.0);
-
-  // We already tested EXPECT_DOUBLE_EQ(1.0, values_.further_from_one).
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(values_.further_from_one, 1.0),
-                          "1.0");
-}
-
-// Tests EXPECT_NEAR.
-TEST_F(DoubleTest, EXPECT_NEAR) {
-  EXPECT_NEAR(-1.0, -1.1, 0.2);
-  EXPECT_NEAR(2.0, 3.0, 1.0);
-  EXPECT_NONFATAL_FAILURE(EXPECT_NEAR(1.0, 1.5, 0.25),  // NOLINT
-                          "The difference between 1.0 and 1.5 is 0.5, "
-                          "which exceeds 0.25");
-  // To work around a bug in gcc 2.95.0, there is intentionally no
-  // space after the first comma in the previous statement.
-}
-
-// Tests ASSERT_NEAR.
-TEST_F(DoubleTest, ASSERT_NEAR) {
-  ASSERT_NEAR(-1.0, -1.1, 0.2);
-  ASSERT_NEAR(2.0, 3.0, 1.0);
-  EXPECT_FATAL_FAILURE(ASSERT_NEAR(1.0, 1.5, 0.25),  // NOLINT
-                       "The difference between 1.0 and 1.5 is 0.5, "
-                       "which exceeds 0.25");
-  // To work around a bug in gcc 2.95.0, there is intentionally no
-  // space after the first comma in the previous statement.
-}
-
-// Tests the cases where DoubleLE() should succeed.
-TEST_F(DoubleTest, DoubleLESucceeds) {
-  EXPECT_PRED_FORMAT2(DoubleLE, 1.0, 2.0);  // When val1 < val2,
-  ASSERT_PRED_FORMAT2(DoubleLE, 1.0, 1.0);  // val1 == val2,
-
-  // or when val1 is greater than, but almost equals to, val2.
-  EXPECT_PRED_FORMAT2(DoubleLE, values_.close_to_positive_zero, 0.0);
-}
-
-// Tests the cases where DoubleLE() should fail.
-TEST_F(DoubleTest, DoubleLEFails) {
-  // When val1 is greater than val2 by a large margin,
-  EXPECT_NONFATAL_FAILURE(EXPECT_PRED_FORMAT2(DoubleLE, 2.0, 1.0),
-                          "(2.0) <= (1.0)");
-
-  // or by a small yet non-negligible margin,
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(DoubleLE, values_.further_from_one, 1.0);
-  }, "(values_.further_from_one) <= (1.0)");
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(DoubleLE, values_.nan1, values_.infinity);
-  }, "(values_.nan1) <= (values_.infinity)");
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(DoubleLE, -values_.infinity, values_.nan1);
-  }, " (-values_.infinity) <= (values_.nan1)");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(DoubleLE, values_.nan1, values_.nan1);
-  }, "(values_.nan1) <= (values_.nan1)");
-}
-
-
-// Verifies that a test or test case whose name starts with DISABLED_ is
-// not run.
-
-// A test whose name starts with DISABLED_.
-// Should not run.
-TEST(DisabledTest, DISABLED_TestShouldNotRun) {
-  FAIL() << "Unexpected failure: Disabled test should not be run.";
-}
-
-// A test whose name does not start with DISABLED_.
-// Should run.
-TEST(DisabledTest, NotDISABLED_TestShouldRun) {
-  EXPECT_EQ(1, 1);
-}
-
-// A test case whose name starts with DISABLED_.
-// Should not run.
-TEST(DISABLED_TestSuite, TestShouldNotRun) {
-  FAIL() << "Unexpected failure: Test in disabled test case should not be run.";
-}
-
-// A test case and test whose names start with DISABLED_.
-// Should not run.
-TEST(DISABLED_TestSuite, DISABLED_TestShouldNotRun) {
-  FAIL() << "Unexpected failure: Test in disabled test case should not be run.";
-}
-
-// Check that when all tests in a test case are disabled, SetUpTestSuite() and
-// TearDownTestSuite() are not called.
-class DisabledTestsTest : public Test {
- protected:
-  static void SetUpTestSuite() {
-    FAIL() << "Unexpected failure: All tests disabled in test case. "
-              "SetUpTestSuite() should not be called.";
-  }
-
-  static void TearDownTestSuite() {
-    FAIL() << "Unexpected failure: All tests disabled in test case. "
-              "TearDownTestSuite() should not be called.";
-  }
-};
-
-TEST_F(DisabledTestsTest, DISABLED_TestShouldNotRun_1) {
-  FAIL() << "Unexpected failure: Disabled test should not be run.";
-}
-
-TEST_F(DisabledTestsTest, DISABLED_TestShouldNotRun_2) {
-  FAIL() << "Unexpected failure: Disabled test should not be run.";
-}
-
-// Tests that disabled typed tests aren't run.
-
-#if GTEST_HAS_TYPED_TEST
-
-template <typename T>
-class TypedTest : public Test {
-};
-
-typedef testing::Types<int, double> NumericTypes;
-TYPED_TEST_SUITE(TypedTest, NumericTypes);
-
-TYPED_TEST(TypedTest, DISABLED_ShouldNotRun) {
-  FAIL() << "Unexpected failure: Disabled typed test should not run.";
-}
-
-template <typename T>
-class DISABLED_TypedTest : public Test {
-};
-
-TYPED_TEST_SUITE(DISABLED_TypedTest, NumericTypes);
-
-TYPED_TEST(DISABLED_TypedTest, ShouldNotRun) {
-  FAIL() << "Unexpected failure: Disabled typed test should not run.";
-}
-
-#endif  // GTEST_HAS_TYPED_TEST
-
-// Tests that disabled type-parameterized tests aren't run.
-
-#if GTEST_HAS_TYPED_TEST_P
-
-template <typename T>
-class TypedTestP : public Test {
-};
-
-TYPED_TEST_SUITE_P(TypedTestP);
-
-TYPED_TEST_P(TypedTestP, DISABLED_ShouldNotRun) {
-  FAIL() << "Unexpected failure: "
-         << "Disabled type-parameterized test should not run.";
-}
-
-REGISTER_TYPED_TEST_SUITE_P(TypedTestP, DISABLED_ShouldNotRun);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, TypedTestP, NumericTypes);
-
-template <typename T>
-class DISABLED_TypedTestP : public Test {
-};
-
-TYPED_TEST_SUITE_P(DISABLED_TypedTestP);
-
-TYPED_TEST_P(DISABLED_TypedTestP, ShouldNotRun) {
-  FAIL() << "Unexpected failure: "
-         << "Disabled type-parameterized test should not run.";
-}
-
-REGISTER_TYPED_TEST_SUITE_P(DISABLED_TypedTestP, ShouldNotRun);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, DISABLED_TypedTestP, NumericTypes);
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-
-// Tests that assertion macros evaluate their arguments exactly once.
-
-class SingleEvaluationTest : public Test {
- public:  // Must be public and not protected due to a bug in g++ 3.4.2.
-  // This helper function is needed by the FailedASSERT_STREQ test
-  // below.  It's public to work around C++Builder's bug with scoping local
-  // classes.
-  static void CompareAndIncrementCharPtrs() {
-    ASSERT_STREQ(p1_++, p2_++);
-  }
-
-  // This helper function is needed by the FailedASSERT_NE test below.  It's
-  // public to work around C++Builder's bug with scoping local classes.
-  static void CompareAndIncrementInts() {
-    ASSERT_NE(a_++, b_++);
-  }
-
- protected:
-  SingleEvaluationTest() {
-    p1_ = s1_;
-    p2_ = s2_;
-    a_ = 0;
-    b_ = 0;
-  }
-
-  static const char* const s1_;
-  static const char* const s2_;
-  static const char* p1_;
-  static const char* p2_;
-
-  static int a_;
-  static int b_;
-};
-
-const char* const SingleEvaluationTest::s1_ = "01234";
-const char* const SingleEvaluationTest::s2_ = "abcde";
-const char* SingleEvaluationTest::p1_;
-const char* SingleEvaluationTest::p2_;
-int SingleEvaluationTest::a_;
-int SingleEvaluationTest::b_;
-
-// Tests that when ASSERT_STREQ fails, it evaluates its arguments
-// exactly once.
-TEST_F(SingleEvaluationTest, FailedASSERT_STREQ) {
-  EXPECT_FATAL_FAILURE(SingleEvaluationTest::CompareAndIncrementCharPtrs(),
-                       "p2_++");
-  EXPECT_EQ(s1_ + 1, p1_);
-  EXPECT_EQ(s2_ + 1, p2_);
-}
-
-// Tests that string assertion arguments are evaluated exactly once.
-TEST_F(SingleEvaluationTest, ASSERT_STR) {
-  // successful EXPECT_STRNE
-  EXPECT_STRNE(p1_++, p2_++);
-  EXPECT_EQ(s1_ + 1, p1_);
-  EXPECT_EQ(s2_ + 1, p2_);
-
-  // failed EXPECT_STRCASEEQ
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRCASEEQ(p1_++, p2_++),
-                          "Ignoring case");
-  EXPECT_EQ(s1_ + 2, p1_);
-  EXPECT_EQ(s2_ + 2, p2_);
-}
-
-// Tests that when ASSERT_NE fails, it evaluates its arguments exactly
-// once.
-TEST_F(SingleEvaluationTest, FailedASSERT_NE) {
-  EXPECT_FATAL_FAILURE(SingleEvaluationTest::CompareAndIncrementInts(),
-                       "(a_++) != (b_++)");
-  EXPECT_EQ(1, a_);
-  EXPECT_EQ(1, b_);
-}
-
-// Tests that assertion arguments are evaluated exactly once.
-TEST_F(SingleEvaluationTest, OtherCases) {
-  // successful EXPECT_TRUE
-  EXPECT_TRUE(0 == a_++);  // NOLINT
-  EXPECT_EQ(1, a_);
-
-  // failed EXPECT_TRUE
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(-1 == a_++), "-1 == a_++");
-  EXPECT_EQ(2, a_);
-
-  // successful EXPECT_GT
-  EXPECT_GT(a_++, b_++);
-  EXPECT_EQ(3, a_);
-  EXPECT_EQ(1, b_);
-
-  // failed EXPECT_LT
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(a_++, b_++), "(a_++) < (b_++)");
-  EXPECT_EQ(4, a_);
-  EXPECT_EQ(2, b_);
-
-  // successful ASSERT_TRUE
-  ASSERT_TRUE(0 < a_++);  // NOLINT
-  EXPECT_EQ(5, a_);
-
-  // successful ASSERT_GT
-  ASSERT_GT(a_++, b_++);
-  EXPECT_EQ(6, a_);
-  EXPECT_EQ(3, b_);
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-void ThrowAnInteger() {
-  throw 1;
-}
-
-// Tests that assertion arguments are evaluated exactly once.
-TEST_F(SingleEvaluationTest, ExceptionTests) {
-  // successful EXPECT_THROW
-  EXPECT_THROW({  // NOLINT
-    a_++;
-    ThrowAnInteger();
-  }, int);
-  EXPECT_EQ(1, a_);
-
-  // failed EXPECT_THROW, throws different
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW({  // NOLINT
-    a_++;
-    ThrowAnInteger();
-  }, bool), "throws a different type");
-  EXPECT_EQ(2, a_);
-
-  // failed EXPECT_THROW, throws nothing
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(a_++, bool), "throws nothing");
-  EXPECT_EQ(3, a_);
-
-  // successful EXPECT_NO_THROW
-  EXPECT_NO_THROW(a_++);
-  EXPECT_EQ(4, a_);
-
-  // failed EXPECT_NO_THROW
-  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW({  // NOLINT
-    a_++;
-    ThrowAnInteger();
-  }), "it throws");
-  EXPECT_EQ(5, a_);
-
-  // successful EXPECT_ANY_THROW
-  EXPECT_ANY_THROW({  // NOLINT
-    a_++;
-    ThrowAnInteger();
-  });
-  EXPECT_EQ(6, a_);
-
-  // failed EXPECT_ANY_THROW
-  EXPECT_NONFATAL_FAILURE(EXPECT_ANY_THROW(a_++), "it doesn't");
-  EXPECT_EQ(7, a_);
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Tests {ASSERT|EXPECT}_NO_FATAL_FAILURE.
-class NoFatalFailureTest : public Test {
- protected:
-  void Succeeds() {}
-  void FailsNonFatal() {
-    ADD_FAILURE() << "some non-fatal failure";
-  }
-  void Fails() {
-    FAIL() << "some fatal failure";
-  }
-
-  void DoAssertNoFatalFailureOnFails() {
-    ASSERT_NO_FATAL_FAILURE(Fails());
-    ADD_FAILURE() << "should not reach here.";
-  }
-
-  void DoExpectNoFatalFailureOnFails() {
-    EXPECT_NO_FATAL_FAILURE(Fails());
-    ADD_FAILURE() << "other failure";
-  }
-};
-
-TEST_F(NoFatalFailureTest, NoFailure) {
-  EXPECT_NO_FATAL_FAILURE(Succeeds());
-  ASSERT_NO_FATAL_FAILURE(Succeeds());
-}
-
-TEST_F(NoFatalFailureTest, NonFatalIsNoFailure) {
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_NO_FATAL_FAILURE(FailsNonFatal()),
-      "some non-fatal failure");
-  EXPECT_NONFATAL_FAILURE(
-      ASSERT_NO_FATAL_FAILURE(FailsNonFatal()),
-      "some non-fatal failure");
-}
-
-TEST_F(NoFatalFailureTest, AssertNoFatalFailureOnFatalFailure) {
-  TestPartResultArray gtest_failures;
-  {
-    ScopedFakeTestPartResultReporter gtest_reporter(&gtest_failures);
-    DoAssertNoFatalFailureOnFails();
-  }
-  ASSERT_EQ(2, gtest_failures.size());
-  EXPECT_EQ(TestPartResult::kFatalFailure,
-            gtest_failures.GetTestPartResult(0).type());
-  EXPECT_EQ(TestPartResult::kFatalFailure,
-            gtest_failures.GetTestPartResult(1).type());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "some fatal failure",
-                      gtest_failures.GetTestPartResult(0).message());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "it does",
-                      gtest_failures.GetTestPartResult(1).message());
-}
-
-TEST_F(NoFatalFailureTest, ExpectNoFatalFailureOnFatalFailure) {
-  TestPartResultArray gtest_failures;
-  {
-    ScopedFakeTestPartResultReporter gtest_reporter(&gtest_failures);
-    DoExpectNoFatalFailureOnFails();
-  }
-  ASSERT_EQ(3, gtest_failures.size());
-  EXPECT_EQ(TestPartResult::kFatalFailure,
-            gtest_failures.GetTestPartResult(0).type());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure,
-            gtest_failures.GetTestPartResult(1).type());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure,
-            gtest_failures.GetTestPartResult(2).type());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "some fatal failure",
-                      gtest_failures.GetTestPartResult(0).message());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "it does",
-                      gtest_failures.GetTestPartResult(1).message());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "other failure",
-                      gtest_failures.GetTestPartResult(2).message());
-}
-
-TEST_F(NoFatalFailureTest, MessageIsStreamable) {
-  TestPartResultArray gtest_failures;
-  {
-    ScopedFakeTestPartResultReporter gtest_reporter(&gtest_failures);
-    EXPECT_NO_FATAL_FAILURE(FAIL() << "foo") << "my message";
-  }
-  ASSERT_EQ(2, gtest_failures.size());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure,
-            gtest_failures.GetTestPartResult(0).type());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure,
-            gtest_failures.GetTestPartResult(1).type());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "foo",
-                      gtest_failures.GetTestPartResult(0).message());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "my message",
-                      gtest_failures.GetTestPartResult(1).message());
-}
-
-// Tests non-string assertions.
-
-std::string EditsToString(const std::vector<EditType>& edits) {
-  std::string out;
-  for (size_t i = 0; i < edits.size(); ++i) {
-    static const char kEdits[] = " +-/";
-    out.append(1, kEdits[edits[i]]);
-  }
-  return out;
-}
-
-std::vector<size_t> CharsToIndices(const std::string& str) {
-  std::vector<size_t> out;
-  for (size_t i = 0; i < str.size(); ++i) {
-    out.push_back(static_cast<size_t>(str[i]));
-  }
-  return out;
-}
-
-std::vector<std::string> CharsToLines(const std::string& str) {
-  std::vector<std::string> out;
-  for (size_t i = 0; i < str.size(); ++i) {
-    out.push_back(str.substr(i, 1));
-  }
-  return out;
-}
-
-TEST(EditDistance, TestSuites) {
-  struct Case {
-    int line;
-    const char* left;
-    const char* right;
-    const char* expected_edits;
-    const char* expected_diff;
-  };
-  static const Case kCases[] = {
-      // No change.
-      {__LINE__, "A", "A", " ", ""},
-      {__LINE__, "ABCDE", "ABCDE", "     ", ""},
-      // Simple adds.
-      {__LINE__, "X", "XA", " +", "@@ +1,2 @@\n X\n+A\n"},
-      {__LINE__, "X", "XABCD", " ++++", "@@ +1,5 @@\n X\n+A\n+B\n+C\n+D\n"},
-      // Simple removes.
-      {__LINE__, "XA", "X", " -", "@@ -1,2 @@\n X\n-A\n"},
-      {__LINE__, "XABCD", "X", " ----", "@@ -1,5 @@\n X\n-A\n-B\n-C\n-D\n"},
-      // Simple replaces.
-      {__LINE__, "A", "a", "/", "@@ -1,1 +1,1 @@\n-A\n+a\n"},
-      {__LINE__, "ABCD", "abcd", "////",
-       "@@ -1,4 +1,4 @@\n-A\n-B\n-C\n-D\n+a\n+b\n+c\n+d\n"},
-      // Path finding.
-      {__LINE__, "ABCDEFGH", "ABXEGH1", "  -/ -  +",
-       "@@ -1,8 +1,7 @@\n A\n B\n-C\n-D\n+X\n E\n-F\n G\n H\n+1\n"},
-      {__LINE__, "AAAABCCCC", "ABABCDCDC", "- /   + / ",
-       "@@ -1,9 +1,9 @@\n-A\n A\n-A\n+B\n A\n B\n C\n+D\n C\n-C\n+D\n C\n"},
-      {__LINE__, "ABCDE", "BCDCD", "-   +/",
-       "@@ -1,5 +1,5 @@\n-A\n B\n C\n D\n-E\n+C\n+D\n"},
-      {__LINE__, "ABCDEFGHIJKL", "BCDCDEFGJKLJK", "- ++     --   ++",
-       "@@ -1,4 +1,5 @@\n-A\n B\n+C\n+D\n C\n D\n"
-       "@@ -6,7 +7,7 @@\n F\n G\n-H\n-I\n J\n K\n L\n+J\n+K\n"},
-      {}};
-  for (const Case* c = kCases; c->left; ++c) {
-    EXPECT_TRUE(c->expected_edits ==
-                EditsToString(CalculateOptimalEdits(CharsToIndices(c->left),
-                                                    CharsToIndices(c->right))))
-        << "Left <" << c->left << "> Right <" << c->right << "> Edits <"
-        << EditsToString(CalculateOptimalEdits(
-               CharsToIndices(c->left), CharsToIndices(c->right))) << ">";
-    EXPECT_TRUE(c->expected_diff == CreateUnifiedDiff(CharsToLines(c->left),
-                                                      CharsToLines(c->right)))
-        << "Left <" << c->left << "> Right <" << c->right << "> Diff <"
-        << CreateUnifiedDiff(CharsToLines(c->left), CharsToLines(c->right))
-        << ">";
-  }
-}
-
-// Tests EqFailure(), used for implementing *EQ* assertions.
-TEST(AssertionTest, EqFailure) {
-  const std::string foo_val("5"), bar_val("6");
-  const std::string msg1(
-      EqFailure("foo", "bar", foo_val, bar_val, false)
-      .failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  foo\n"
-      "    Which is: 5\n"
-      "  bar\n"
-      "    Which is: 6",
-      msg1.c_str());
-
-  const std::string msg2(
-      EqFailure("foo", "6", foo_val, bar_val, false)
-      .failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  foo\n"
-      "    Which is: 5\n"
-      "  6",
-      msg2.c_str());
-
-  const std::string msg3(
-      EqFailure("5", "bar", foo_val, bar_val, false)
-      .failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  5\n"
-      "  bar\n"
-      "    Which is: 6",
-      msg3.c_str());
-
-  const std::string msg4(
-      EqFailure("5", "6", foo_val, bar_val, false).failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  5\n"
-      "  6",
-      msg4.c_str());
-
-  const std::string msg5(
-      EqFailure("foo", "bar",
-                std::string("\"x\""), std::string("\"y\""),
-                true).failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  foo\n"
-      "    Which is: \"x\"\n"
-      "  bar\n"
-      "    Which is: \"y\"\n"
-      "Ignoring case",
-      msg5.c_str());
-}
-
-TEST(AssertionTest, EqFailureWithDiff) {
-  const std::string left(
-      "1\\n2XXX\\n3\\n5\\n6\\n7\\n8\\n9\\n10\\n11\\n12XXX\\n13\\n14\\n15");
-  const std::string right(
-      "1\\n2\\n3\\n4\\n5\\n6\\n7\\n8\\n9\\n11\\n12\\n13\\n14");
-  const std::string msg1(
-      EqFailure("left", "right", left, right, false).failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  left\n"
-      "    Which is: "
-      "1\\n2XXX\\n3\\n5\\n6\\n7\\n8\\n9\\n10\\n11\\n12XXX\\n13\\n14\\n15\n"
-      "  right\n"
-      "    Which is: 1\\n2\\n3\\n4\\n5\\n6\\n7\\n8\\n9\\n11\\n12\\n13\\n14\n"
-      "With diff:\n@@ -1,5 +1,6 @@\n 1\n-2XXX\n+2\n 3\n+4\n 5\n 6\n"
-      "@@ -7,8 +8,6 @@\n 8\n 9\n-10\n 11\n-12XXX\n+12\n 13\n 14\n-15\n",
-      msg1.c_str());
-}
-
-// Tests AppendUserMessage(), used for implementing the *EQ* macros.
-TEST(AssertionTest, AppendUserMessage) {
-  const std::string foo("foo");
-
-  Message msg;
-  EXPECT_STREQ("foo",
-               AppendUserMessage(foo, msg).c_str());
-
-  msg << "bar";
-  EXPECT_STREQ("foo\nbar",
-               AppendUserMessage(foo, msg).c_str());
-}
-
-#ifdef __BORLANDC__
-// Silences warnings: "Condition is always true", "Unreachable code"
-# pragma option push -w-ccc -w-rch
-#endif
-
-// Tests ASSERT_TRUE.
-TEST(AssertionTest, ASSERT_TRUE) {
-  ASSERT_TRUE(2 > 1);  // NOLINT
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(2 < 1),
-                       "2 < 1");
-}
-
-// Tests ASSERT_TRUE(predicate) for predicates returning AssertionResult.
-TEST(AssertionTest, AssertTrueWithAssertionResult) {
-  ASSERT_TRUE(ResultIsEven(2));
-#ifndef __BORLANDC__
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(ResultIsEven(3)),
-                       "Value of: ResultIsEven(3)\n"
-                       "  Actual: false (3 is odd)\n"
-                       "Expected: true");
-#endif
-  ASSERT_TRUE(ResultIsEvenNoExplanation(2));
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(ResultIsEvenNoExplanation(3)),
-                       "Value of: ResultIsEvenNoExplanation(3)\n"
-                       "  Actual: false (3 is odd)\n"
-                       "Expected: true");
-}
-
-// Tests ASSERT_FALSE.
-TEST(AssertionTest, ASSERT_FALSE) {
-  ASSERT_FALSE(2 < 1);  // NOLINT
-  EXPECT_FATAL_FAILURE(ASSERT_FALSE(2 > 1),
-                       "Value of: 2 > 1\n"
-                       "  Actual: true\n"
-                       "Expected: false");
-}
-
-// Tests ASSERT_FALSE(predicate) for predicates returning AssertionResult.
-TEST(AssertionTest, AssertFalseWithAssertionResult) {
-  ASSERT_FALSE(ResultIsEven(3));
-#ifndef __BORLANDC__
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE(ASSERT_FALSE(ResultIsEven(2)),
-                       "Value of: ResultIsEven(2)\n"
-                       "  Actual: true (2 is even)\n"
-                       "Expected: false");
-#endif
-  ASSERT_FALSE(ResultIsEvenNoExplanation(3));
-  EXPECT_FATAL_FAILURE(ASSERT_FALSE(ResultIsEvenNoExplanation(2)),
-                       "Value of: ResultIsEvenNoExplanation(2)\n"
-                       "  Actual: true\n"
-                       "Expected: false");
-}
-
-#ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them
-# pragma option pop
-#endif
-
-// Tests using ASSERT_EQ on double values.  The purpose is to make
-// sure that the specialization we did for integer and anonymous enums
-// isn't used for double arguments.
-TEST(ExpectTest, ASSERT_EQ_Double) {
-  // A success.
-  ASSERT_EQ(5.6, 5.6);
-
-  // A failure.
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(5.1, 5.2),
-                       "5.1");
-}
-
-// Tests ASSERT_EQ.
-TEST(AssertionTest, ASSERT_EQ) {
-  ASSERT_EQ(5, 2 + 3);
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(5, 2*3),
-                       "Expected equality of these values:\n"
-                       "  5\n"
-                       "  2*3\n"
-                       "    Which is: 6");
-}
-
-// Tests ASSERT_EQ(NULL, pointer).
-TEST(AssertionTest, ASSERT_EQ_NULL) {
-  // A success.
-  const char* p = nullptr;
-  // Some older GCC versions may issue a spurious warning in this or the next
-  // assertion statement. This warning should not be suppressed with
-  // static_cast since the test verifies the ability to use bare NULL as the
-  // expected parameter to the macro.
-  ASSERT_EQ(nullptr, p);
-
-  // A failure.
-  static int n = 0;
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(nullptr, &n), "  &n\n    Which is:");
-}
-
-// Tests ASSERT_EQ(0, non_pointer).  Since the literal 0 can be
-// treated as a null pointer by the compiler, we need to make sure
-// that ASSERT_EQ(0, non_pointer) isn't interpreted by Google Test as
-// ASSERT_EQ(static_cast<void*>(NULL), non_pointer).
-TEST(ExpectTest, ASSERT_EQ_0) {
-  int n = 0;
-
-  // A success.
-  ASSERT_EQ(0, n);
-
-  // A failure.
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(0, 5.6),
-                       "  0\n  5.6");
-}
-
-// Tests ASSERT_NE.
-TEST(AssertionTest, ASSERT_NE) {
-  ASSERT_NE(6, 7);
-  EXPECT_FATAL_FAILURE(ASSERT_NE('a', 'a'),
-                       "Expected: ('a') != ('a'), "
-                       "actual: 'a' (97, 0x61) vs 'a' (97, 0x61)");
-}
-
-// Tests ASSERT_LE.
-TEST(AssertionTest, ASSERT_LE) {
-  ASSERT_LE(2, 3);
-  ASSERT_LE(2, 2);
-  EXPECT_FATAL_FAILURE(ASSERT_LE(2, 0),
-                       "Expected: (2) <= (0), actual: 2 vs 0");
-}
-
-// Tests ASSERT_LT.
-TEST(AssertionTest, ASSERT_LT) {
-  ASSERT_LT(2, 3);
-  EXPECT_FATAL_FAILURE(ASSERT_LT(2, 2),
-                       "Expected: (2) < (2), actual: 2 vs 2");
-}
-
-// Tests ASSERT_GE.
-TEST(AssertionTest, ASSERT_GE) {
-  ASSERT_GE(2, 1);
-  ASSERT_GE(2, 2);
-  EXPECT_FATAL_FAILURE(ASSERT_GE(2, 3),
-                       "Expected: (2) >= (3), actual: 2 vs 3");
-}
-
-// Tests ASSERT_GT.
-TEST(AssertionTest, ASSERT_GT) {
-  ASSERT_GT(2, 1);
-  EXPECT_FATAL_FAILURE(ASSERT_GT(2, 2),
-                       "Expected: (2) > (2), actual: 2 vs 2");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-void ThrowNothing() {}
-
-// Tests ASSERT_THROW.
-TEST(AssertionTest, ASSERT_THROW) {
-  ASSERT_THROW(ThrowAnInteger(), int);
-
-# ifndef __BORLANDC__
-
-  // ICE's in C++Builder 2007 and 2009.
-  EXPECT_FATAL_FAILURE(
-      ASSERT_THROW(ThrowAnInteger(), bool),
-      "Expected: ThrowAnInteger() throws an exception of type bool.\n"
-      "  Actual: it throws a different type.");
-# endif
-
-  EXPECT_FATAL_FAILURE(
-      ASSERT_THROW(ThrowNothing(), bool),
-      "Expected: ThrowNothing() throws an exception of type bool.\n"
-      "  Actual: it throws nothing.");
-}
-
-// Tests ASSERT_NO_THROW.
-TEST(AssertionTest, ASSERT_NO_THROW) {
-  ASSERT_NO_THROW(ThrowNothing());
-  EXPECT_FATAL_FAILURE(ASSERT_NO_THROW(ThrowAnInteger()),
-                       "Expected: ThrowAnInteger() doesn't throw an exception."
-                       "\n  Actual: it throws.");
-}
-
-// Tests ASSERT_ANY_THROW.
-TEST(AssertionTest, ASSERT_ANY_THROW) {
-  ASSERT_ANY_THROW(ThrowAnInteger());
-  EXPECT_FATAL_FAILURE(
-      ASSERT_ANY_THROW(ThrowNothing()),
-      "Expected: ThrowNothing() throws an exception.\n"
-      "  Actual: it doesn't.");
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Makes sure we deal with the precedence of <<.  This test should
-// compile.
-TEST(AssertionTest, AssertPrecedence) {
-  ASSERT_EQ(1 < 2, true);
-  bool false_value = false;
-  ASSERT_EQ(true && false_value, false);
-}
-
-// A subroutine used by the following test.
-void TestEq1(int x) {
-  ASSERT_EQ(1, x);
-}
-
-// Tests calling a test subroutine that's not part of a fixture.
-TEST(AssertionTest, NonFixtureSubroutine) {
-  EXPECT_FATAL_FAILURE(TestEq1(2),
-                       "  x\n    Which is: 2");
-}
-
-// An uncopyable class.
-class Uncopyable {
- public:
-  explicit Uncopyable(int a_value) : value_(a_value) {}
-
-  int value() const { return value_; }
-  bool operator==(const Uncopyable& rhs) const {
-    return value() == rhs.value();
-  }
- private:
-  // This constructor deliberately has no implementation, as we don't
-  // want this class to be copyable.
-  Uncopyable(const Uncopyable&);  // NOLINT
-
-  int value_;
-};
-
-::std::ostream& operator<<(::std::ostream& os, const Uncopyable& value) {
-  return os << value.value();
-}
-
-
-bool IsPositiveUncopyable(const Uncopyable& x) {
-  return x.value() > 0;
-}
-
-// A subroutine used by the following test.
-void TestAssertNonPositive() {
-  Uncopyable y(-1);
-  ASSERT_PRED1(IsPositiveUncopyable, y);
-}
-// A subroutine used by the following test.
-void TestAssertEqualsUncopyable() {
-  Uncopyable x(5);
-  Uncopyable y(-1);
-  ASSERT_EQ(x, y);
-}
-
-// Tests that uncopyable objects can be used in assertions.
-TEST(AssertionTest, AssertWorksWithUncopyableObject) {
-  Uncopyable x(5);
-  ASSERT_PRED1(IsPositiveUncopyable, x);
-  ASSERT_EQ(x, x);
-  EXPECT_FATAL_FAILURE(TestAssertNonPositive(),
-    "IsPositiveUncopyable(y) evaluates to false, where\ny evaluates to -1");
-  EXPECT_FATAL_FAILURE(TestAssertEqualsUncopyable(),
-                       "Expected equality of these values:\n"
-                       "  x\n    Which is: 5\n  y\n    Which is: -1");
-}
-
-// Tests that uncopyable objects can be used in expects.
-TEST(AssertionTest, ExpectWorksWithUncopyableObject) {
-  Uncopyable x(5);
-  EXPECT_PRED1(IsPositiveUncopyable, x);
-  Uncopyable y(-1);
-  EXPECT_NONFATAL_FAILURE(EXPECT_PRED1(IsPositiveUncopyable, y),
-    "IsPositiveUncopyable(y) evaluates to false, where\ny evaluates to -1");
-  EXPECT_EQ(x, x);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(x, y),
-                          "Expected equality of these values:\n"
-                          "  x\n    Which is: 5\n  y\n    Which is: -1");
-}
-
-enum NamedEnum {
-  kE1 = 0,
-  kE2 = 1
-};
-
-TEST(AssertionTest, NamedEnum) {
-  EXPECT_EQ(kE1, kE1);
-  EXPECT_LT(kE1, kE2);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(kE1, kE2), "Which is: 0");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(kE1, kE2), "Which is: 1");
-}
-
-// Sun Studio and HP aCC2reject this code.
-#if !defined(__SUNPRO_CC) && !defined(__HP_aCC)
-
-// Tests using assertions with anonymous enums.
-enum {
-  kCaseA = -1,
-
-# if GTEST_OS_LINUX
-
-  // We want to test the case where the size of the anonymous enum is
-  // larger than sizeof(int), to make sure our implementation of the
-  // assertions doesn't truncate the enums.  However, MSVC
-  // (incorrectly) doesn't allow an enum value to exceed the range of
-  // an int, so this has to be conditionally compiled.
-  //
-  // On Linux, kCaseB and kCaseA have the same value when truncated to
-  // int size.  We want to test whether this will confuse the
-  // assertions.
-  kCaseB = testing::internal::kMaxBiggestInt,
-
-# else
-
-  kCaseB = INT_MAX,
-
-# endif  // GTEST_OS_LINUX
-
-  kCaseC = 42
-};
-
-TEST(AssertionTest, AnonymousEnum) {
-# if GTEST_OS_LINUX
-
-  EXPECT_EQ(static_cast<int>(kCaseA), static_cast<int>(kCaseB));
-
-# endif  // GTEST_OS_LINUX
-
-  EXPECT_EQ(kCaseA, kCaseA);
-  EXPECT_NE(kCaseA, kCaseB);
-  EXPECT_LT(kCaseA, kCaseB);
-  EXPECT_LE(kCaseA, kCaseB);
-  EXPECT_GT(kCaseB, kCaseA);
-  EXPECT_GE(kCaseA, kCaseA);
-  EXPECT_NONFATAL_FAILURE(EXPECT_GE(kCaseA, kCaseB),
-                          "(kCaseA) >= (kCaseB)");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GE(kCaseA, kCaseC),
-                          "-1 vs 42");
-
-  ASSERT_EQ(kCaseA, kCaseA);
-  ASSERT_NE(kCaseA, kCaseB);
-  ASSERT_LT(kCaseA, kCaseB);
-  ASSERT_LE(kCaseA, kCaseB);
-  ASSERT_GT(kCaseB, kCaseA);
-  ASSERT_GE(kCaseA, kCaseA);
-
-# ifndef __BORLANDC__
-
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(kCaseA, kCaseB),
-                       "  kCaseB\n    Which is: ");
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(kCaseA, kCaseC),
-                       "\n    Which is: 42");
-# endif
-
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(kCaseA, kCaseC),
-                       "\n    Which is: -1");
-}
-
-#endif  // !GTEST_OS_MAC && !defined(__SUNPRO_CC)
-
-#if GTEST_OS_WINDOWS
-
-static HRESULT UnexpectedHRESULTFailure() {
-  return E_UNEXPECTED;
-}
-
-static HRESULT OkHRESULTSuccess() {
-  return S_OK;
-}
-
-static HRESULT FalseHRESULTSuccess() {
-  return S_FALSE;
-}
-
-// HRESULT assertion tests test both zero and non-zero
-// success codes as well as failure message for each.
-//
-// Windows CE doesn't support message texts.
-TEST(HRESULTAssertionTest, EXPECT_HRESULT_SUCCEEDED) {
-  EXPECT_HRESULT_SUCCEEDED(S_OK);
-  EXPECT_HRESULT_SUCCEEDED(S_FALSE);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_HRESULT_SUCCEEDED(UnexpectedHRESULTFailure()),
-    "Expected: (UnexpectedHRESULTFailure()) succeeds.\n"
-    "  Actual: 0x8000FFFF");
-}
-
-TEST(HRESULTAssertionTest, ASSERT_HRESULT_SUCCEEDED) {
-  ASSERT_HRESULT_SUCCEEDED(S_OK);
-  ASSERT_HRESULT_SUCCEEDED(S_FALSE);
-
-  EXPECT_FATAL_FAILURE(ASSERT_HRESULT_SUCCEEDED(UnexpectedHRESULTFailure()),
-    "Expected: (UnexpectedHRESULTFailure()) succeeds.\n"
-    "  Actual: 0x8000FFFF");
-}
-
-TEST(HRESULTAssertionTest, EXPECT_HRESULT_FAILED) {
-  EXPECT_HRESULT_FAILED(E_UNEXPECTED);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_HRESULT_FAILED(OkHRESULTSuccess()),
-    "Expected: (OkHRESULTSuccess()) fails.\n"
-    "  Actual: 0x0");
-  EXPECT_NONFATAL_FAILURE(EXPECT_HRESULT_FAILED(FalseHRESULTSuccess()),
-    "Expected: (FalseHRESULTSuccess()) fails.\n"
-    "  Actual: 0x1");
-}
-
-TEST(HRESULTAssertionTest, ASSERT_HRESULT_FAILED) {
-  ASSERT_HRESULT_FAILED(E_UNEXPECTED);
-
-# ifndef __BORLANDC__
-
-  // ICE's in C++Builder 2007 and 2009.
-  EXPECT_FATAL_FAILURE(ASSERT_HRESULT_FAILED(OkHRESULTSuccess()),
-    "Expected: (OkHRESULTSuccess()) fails.\n"
-    "  Actual: 0x0");
-# endif
-
-  EXPECT_FATAL_FAILURE(ASSERT_HRESULT_FAILED(FalseHRESULTSuccess()),
-    "Expected: (FalseHRESULTSuccess()) fails.\n"
-    "  Actual: 0x1");
-}
-
-// Tests that streaming to the HRESULT macros works.
-TEST(HRESULTAssertionTest, Streaming) {
-  EXPECT_HRESULT_SUCCEEDED(S_OK) << "unexpected failure";
-  ASSERT_HRESULT_SUCCEEDED(S_OK) << "unexpected failure";
-  EXPECT_HRESULT_FAILED(E_UNEXPECTED) << "unexpected failure";
-  ASSERT_HRESULT_FAILED(E_UNEXPECTED) << "unexpected failure";
-
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_HRESULT_SUCCEEDED(E_UNEXPECTED) << "expected failure",
-      "expected failure");
-
-# ifndef __BORLANDC__
-
-  // ICE's in C++Builder 2007 and 2009.
-  EXPECT_FATAL_FAILURE(
-      ASSERT_HRESULT_SUCCEEDED(E_UNEXPECTED) << "expected failure",
-      "expected failure");
-# endif
-
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_HRESULT_FAILED(S_OK) << "expected failure",
-      "expected failure");
-
-  EXPECT_FATAL_FAILURE(
-      ASSERT_HRESULT_FAILED(S_OK) << "expected failure",
-      "expected failure");
-}
-
-#endif  // GTEST_OS_WINDOWS
-
-#ifdef __BORLANDC__
-// Silences warnings: "Condition is always true", "Unreachable code"
-# pragma option push -w-ccc -w-rch
-#endif
-
-// Tests that the assertion macros behave like single statements.
-TEST(AssertionSyntaxTest, BasicAssertionsBehavesLikeSingleStatement) {
-  if (AlwaysFalse())
-    ASSERT_TRUE(false) << "This should never be executed; "
-                          "It's a compilation test only.";
-
-  if (AlwaysTrue())
-    EXPECT_FALSE(false);
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ASSERT_LT(1, 3);
-
-  if (AlwaysFalse())
-    ;  // NOLINT
-  else
-    EXPECT_GT(3, 2) << "";
-}
-
-#if GTEST_HAS_EXCEPTIONS
-// Tests that the compiler will not complain about unreachable code in the
-// EXPECT_THROW/EXPECT_ANY_THROW/EXPECT_NO_THROW macros.
-TEST(ExpectThrowTest, DoesNotGenerateUnreachableCodeWarning) {
-  int n = 0;
-
-  EXPECT_THROW(throw 1, int);
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(n++, int), "");
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(throw 1, const char*), "");
-  EXPECT_NO_THROW(n++);
-  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW(throw 1), "");
-  EXPECT_ANY_THROW(throw 1);
-  EXPECT_NONFATAL_FAILURE(EXPECT_ANY_THROW(n++), "");
-}
-
-TEST(AssertionSyntaxTest, ExceptionAssertionsBehavesLikeSingleStatement) {
-  if (AlwaysFalse())
-    EXPECT_THROW(ThrowNothing(), bool);
-
-  if (AlwaysTrue())
-    EXPECT_THROW(ThrowAnInteger(), int);
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    EXPECT_NO_THROW(ThrowAnInteger());
-
-  if (AlwaysTrue())
-    EXPECT_NO_THROW(ThrowNothing());
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    EXPECT_ANY_THROW(ThrowNothing());
-
-  if (AlwaysTrue())
-    EXPECT_ANY_THROW(ThrowAnInteger());
-  else
-    ;  // NOLINT
-}
-#endif  // GTEST_HAS_EXCEPTIONS
-
-TEST(AssertionSyntaxTest, NoFatalFailureAssertionsBehavesLikeSingleStatement) {
-  if (AlwaysFalse())
-    EXPECT_NO_FATAL_FAILURE(FAIL()) << "This should never be executed. "
-                                    << "It's a compilation test only.";
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ASSERT_NO_FATAL_FAILURE(FAIL()) << "";
-  else
-    ;  // NOLINT
-
-  if (AlwaysTrue())
-    EXPECT_NO_FATAL_FAILURE(SUCCEED());
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ;  // NOLINT
-  else
-    ASSERT_NO_FATAL_FAILURE(SUCCEED());
-}
-
-// Tests that the assertion macros work well with switch statements.
-TEST(AssertionSyntaxTest, WorksWithSwitch) {
-  switch (0) {
-    case 1:
-      break;
-    default:
-      ASSERT_TRUE(true);
-  }
-
-  switch (0)
-    case 0:
-      EXPECT_FALSE(false) << "EXPECT_FALSE failed in switch case";
-
-  // Binary assertions are implemented using a different code path
-  // than the Boolean assertions.  Hence we test them separately.
-  switch (0) {
-    case 1:
-    default:
-      ASSERT_EQ(1, 1) << "ASSERT_EQ failed in default switch handler";
-  }
-
-  switch (0)
-    case 0:
-      EXPECT_NE(1, 2);
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-void ThrowAString() {
-    throw "std::string";
-}
-
-// Test that the exception assertion macros compile and work with const
-// type qualifier.
-TEST(AssertionSyntaxTest, WorksWithConst) {
-    ASSERT_THROW(ThrowAString(), const char*);
-
-    EXPECT_THROW(ThrowAString(), const char*);
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-}  // namespace
-
-namespace testing {
-
-// Tests that Google Test tracks SUCCEED*.
-TEST(SuccessfulAssertionTest, SUCCEED) {
-  SUCCEED();
-  SUCCEED() << "OK";
-  EXPECT_EQ(2, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-// Tests that Google Test doesn't track successful EXPECT_*.
-TEST(SuccessfulAssertionTest, EXPECT) {
-  EXPECT_TRUE(true);
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-// Tests that Google Test doesn't track successful EXPECT_STR*.
-TEST(SuccessfulAssertionTest, EXPECT_STR) {
-  EXPECT_STREQ("", "");
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-// Tests that Google Test doesn't track successful ASSERT_*.
-TEST(SuccessfulAssertionTest, ASSERT) {
-  ASSERT_TRUE(true);
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-// Tests that Google Test doesn't track successful ASSERT_STR*.
-TEST(SuccessfulAssertionTest, ASSERT_STR) {
-  ASSERT_STREQ("", "");
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-}  // namespace testing
-
-namespace {
-
-// Tests the message streaming variation of assertions.
-
-TEST(AssertionWithMessageTest, EXPECT) {
-  EXPECT_EQ(1, 1) << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE(1, 1) << "Expected failure #1.",
-                          "Expected failure #1");
-  EXPECT_LE(1, 2) << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(1, 0) << "Expected failure #2.",
-                          "Expected failure #2.");
-  EXPECT_GE(1, 0) << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(1, 2) << "Expected failure #3.",
-                          "Expected failure #3.");
-
-  EXPECT_STREQ("1", "1") << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE("1", "1") << "Expected failure #4.",
-                          "Expected failure #4.");
-  EXPECT_STRCASEEQ("a", "A") << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRCASENE("a", "A") << "Expected failure #5.",
-                          "Expected failure #5.");
-
-  EXPECT_FLOAT_EQ(1, 1) << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(1, 1.2) << "Expected failure #6.",
-                          "Expected failure #6.");
-  EXPECT_NEAR(1, 1.1, 0.2) << "This should succeed.";
-}
-
-TEST(AssertionWithMessageTest, ASSERT) {
-  ASSERT_EQ(1, 1) << "This should succeed.";
-  ASSERT_NE(1, 2) << "This should succeed.";
-  ASSERT_LE(1, 2) << "This should succeed.";
-  ASSERT_LT(1, 2) << "This should succeed.";
-  ASSERT_GE(1, 0) << "This should succeed.";
-  EXPECT_FATAL_FAILURE(ASSERT_GT(1, 2) << "Expected failure.",
-                       "Expected failure.");
-}
-
-TEST(AssertionWithMessageTest, ASSERT_STR) {
-  ASSERT_STREQ("1", "1") << "This should succeed.";
-  ASSERT_STRNE("1", "2") << "This should succeed.";
-  ASSERT_STRCASEEQ("a", "A") << "This should succeed.";
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASENE("a", "A") << "Expected failure.",
-                       "Expected failure.");
-}
-
-TEST(AssertionWithMessageTest, ASSERT_FLOATING) {
-  ASSERT_FLOAT_EQ(1, 1) << "This should succeed.";
-  ASSERT_DOUBLE_EQ(1, 1) << "This should succeed.";
-  EXPECT_FATAL_FAILURE(ASSERT_NEAR(1,1.2, 0.1) << "Expect failure.",  // NOLINT
-                       "Expect failure.");
-  // To work around a bug in gcc 2.95.0, there is intentionally no
-  // space after the first comma in the previous statement.
-}
-
-// Tests using ASSERT_FALSE with a streamed message.
-TEST(AssertionWithMessageTest, ASSERT_FALSE) {
-  ASSERT_FALSE(false) << "This shouldn't fail.";
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_FALSE(true) << "Expected failure: " << 2 << " > " << 1
-                       << " evaluates to " << true;
-  }, "Expected failure");
-}
-
-// Tests using FAIL with a streamed message.
-TEST(AssertionWithMessageTest, FAIL) {
-  EXPECT_FATAL_FAILURE(FAIL() << 0,
-                       "0");
-}
-
-// Tests using SUCCEED with a streamed message.
-TEST(AssertionWithMessageTest, SUCCEED) {
-  SUCCEED() << "Success == " << 1;
-}
-
-// Tests using ASSERT_TRUE with a streamed message.
-TEST(AssertionWithMessageTest, ASSERT_TRUE) {
-  ASSERT_TRUE(true) << "This should succeed.";
-  ASSERT_TRUE(true) << true;
-  EXPECT_FATAL_FAILURE(
-      {  // NOLINT
-        ASSERT_TRUE(false) << static_cast<const char*>(nullptr)
-                           << static_cast<char*>(nullptr);
-      },
-      "(null)(null)");
-}
-
-#if GTEST_OS_WINDOWS
-// Tests using wide strings in assertion messages.
-TEST(AssertionWithMessageTest, WideStringMessage) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_TRUE(false) << L"This failure is expected.\x8119";
-  }, "This failure is expected.");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_EQ(1, 2) << "This failure is "
-                    << L"expected too.\x8120";
-  }, "This failure is expected too.");
-}
-#endif  // GTEST_OS_WINDOWS
-
-// Tests EXPECT_TRUE.
-TEST(ExpectTest, EXPECT_TRUE) {
-  EXPECT_TRUE(true) << "Intentional success";
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(false) << "Intentional failure #1.",
-                          "Intentional failure #1.");
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(false) << "Intentional failure #2.",
-                          "Intentional failure #2.");
-  EXPECT_TRUE(2 > 1);  // NOLINT
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(2 < 1),
-                          "Value of: 2 < 1\n"
-                          "  Actual: false\n"
-                          "Expected: true");
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(2 > 3),
-                          "2 > 3");
-}
-
-// Tests EXPECT_TRUE(predicate) for predicates returning AssertionResult.
-TEST(ExpectTest, ExpectTrueWithAssertionResult) {
-  EXPECT_TRUE(ResultIsEven(2));
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(ResultIsEven(3)),
-                          "Value of: ResultIsEven(3)\n"
-                          "  Actual: false (3 is odd)\n"
-                          "Expected: true");
-  EXPECT_TRUE(ResultIsEvenNoExplanation(2));
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(ResultIsEvenNoExplanation(3)),
-                          "Value of: ResultIsEvenNoExplanation(3)\n"
-                          "  Actual: false (3 is odd)\n"
-                          "Expected: true");
-}
-
-// Tests EXPECT_FALSE with a streamed message.
-TEST(ExpectTest, EXPECT_FALSE) {
-  EXPECT_FALSE(2 < 1);  // NOLINT
-  EXPECT_FALSE(false) << "Intentional success";
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(true) << "Intentional failure #1.",
-                          "Intentional failure #1.");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(true) << "Intentional failure #2.",
-                          "Intentional failure #2.");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(2 > 1),
-                          "Value of: 2 > 1\n"
-                          "  Actual: true\n"
-                          "Expected: false");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(2 < 3),
-                          "2 < 3");
-}
-
-// Tests EXPECT_FALSE(predicate) for predicates returning AssertionResult.
-TEST(ExpectTest, ExpectFalseWithAssertionResult) {
-  EXPECT_FALSE(ResultIsEven(3));
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(ResultIsEven(2)),
-                          "Value of: ResultIsEven(2)\n"
-                          "  Actual: true (2 is even)\n"
-                          "Expected: false");
-  EXPECT_FALSE(ResultIsEvenNoExplanation(3));
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(ResultIsEvenNoExplanation(2)),
-                          "Value of: ResultIsEvenNoExplanation(2)\n"
-                          "  Actual: true\n"
-                          "Expected: false");
-}
-
-#ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them
-# pragma option pop
-#endif
-
-// Tests EXPECT_EQ.
-TEST(ExpectTest, EXPECT_EQ) {
-  EXPECT_EQ(5, 2 + 3);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(5, 2*3),
-                          "Expected equality of these values:\n"
-                          "  5\n"
-                          "  2*3\n"
-                          "    Which is: 6");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(5, 2 - 3),
-                          "2 - 3");
-}
-
-// Tests using EXPECT_EQ on double values.  The purpose is to make
-// sure that the specialization we did for integer and anonymous enums
-// isn't used for double arguments.
-TEST(ExpectTest, EXPECT_EQ_Double) {
-  // A success.
-  EXPECT_EQ(5.6, 5.6);
-
-  // A failure.
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(5.1, 5.2),
-                          "5.1");
-}
-
-// Tests EXPECT_EQ(NULL, pointer).
-TEST(ExpectTest, EXPECT_EQ_NULL) {
-  // A success.
-  const char* p = nullptr;
-  // Some older GCC versions may issue a spurious warning in this or the next
-  // assertion statement. This warning should not be suppressed with
-  // static_cast since the test verifies the ability to use bare NULL as the
-  // expected parameter to the macro.
-  EXPECT_EQ(nullptr, p);
-
-  // A failure.
-  int n = 0;
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(nullptr, &n), "  &n\n    Which is:");
-}
-
-// Tests EXPECT_EQ(0, non_pointer).  Since the literal 0 can be
-// treated as a null pointer by the compiler, we need to make sure
-// that EXPECT_EQ(0, non_pointer) isn't interpreted by Google Test as
-// EXPECT_EQ(static_cast<void*>(NULL), non_pointer).
-TEST(ExpectTest, EXPECT_EQ_0) {
-  int n = 0;
-
-  // A success.
-  EXPECT_EQ(0, n);
-
-  // A failure.
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(0, 5.6),
-                          "  0\n  5.6");
-}
-
-// Tests EXPECT_NE.
-TEST(ExpectTest, EXPECT_NE) {
-  EXPECT_NE(6, 7);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE('a', 'a'),
-                          "Expected: ('a') != ('a'), "
-                          "actual: 'a' (97, 0x61) vs 'a' (97, 0x61)");
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE(2, 2),
-                          "2");
-  char* const p0 = nullptr;
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE(p0, p0),
-                          "p0");
-  // Only way to get the Nokia compiler to compile the cast
-  // is to have a separate void* variable first. Putting
-  // the two casts on the same line doesn't work, neither does
-  // a direct C-style to char*.
-  void* pv1 = (void*)0x1234;  // NOLINT
-  char* const p1 = reinterpret_cast<char*>(pv1);
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE(p1, p1),
-                          "p1");
-}
-
-// Tests EXPECT_LE.
-TEST(ExpectTest, EXPECT_LE) {
-  EXPECT_LE(2, 3);
-  EXPECT_LE(2, 2);
-  EXPECT_NONFATAL_FAILURE(EXPECT_LE(2, 0),
-                          "Expected: (2) <= (0), actual: 2 vs 0");
-  EXPECT_NONFATAL_FAILURE(EXPECT_LE(1.1, 0.9),
-                          "(1.1) <= (0.9)");
-}
-
-// Tests EXPECT_LT.
-TEST(ExpectTest, EXPECT_LT) {
-  EXPECT_LT(2, 3);
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(2, 2),
-                          "Expected: (2) < (2), actual: 2 vs 2");
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(2, 1),
-                          "(2) < (1)");
-}
-
-// Tests EXPECT_GE.
-TEST(ExpectTest, EXPECT_GE) {
-  EXPECT_GE(2, 1);
-  EXPECT_GE(2, 2);
-  EXPECT_NONFATAL_FAILURE(EXPECT_GE(2, 3),
-                          "Expected: (2) >= (3), actual: 2 vs 3");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GE(0.9, 1.1),
-                          "(0.9) >= (1.1)");
-}
-
-// Tests EXPECT_GT.
-TEST(ExpectTest, EXPECT_GT) {
-  EXPECT_GT(2, 1);
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(2, 2),
-                          "Expected: (2) > (2), actual: 2 vs 2");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(2, 3),
-                          "(2) > (3)");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Tests EXPECT_THROW.
-TEST(ExpectTest, EXPECT_THROW) {
-  EXPECT_THROW(ThrowAnInteger(), int);
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(ThrowAnInteger(), bool),
-                          "Expected: ThrowAnInteger() throws an exception of "
-                          "type bool.\n  Actual: it throws a different type.");
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_THROW(ThrowNothing(), bool),
-      "Expected: ThrowNothing() throws an exception of type bool.\n"
-      "  Actual: it throws nothing.");
-}
-
-// Tests EXPECT_NO_THROW.
-TEST(ExpectTest, EXPECT_NO_THROW) {
-  EXPECT_NO_THROW(ThrowNothing());
-  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW(ThrowAnInteger()),
-                          "Expected: ThrowAnInteger() doesn't throw an "
-                          "exception.\n  Actual: it throws.");
-}
-
-// Tests EXPECT_ANY_THROW.
-TEST(ExpectTest, EXPECT_ANY_THROW) {
-  EXPECT_ANY_THROW(ThrowAnInteger());
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_ANY_THROW(ThrowNothing()),
-      "Expected: ThrowNothing() throws an exception.\n"
-      "  Actual: it doesn't.");
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Make sure we deal with the precedence of <<.
-TEST(ExpectTest, ExpectPrecedence) {
-  EXPECT_EQ(1 < 2, true);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(true, true && false),
-                          "  true && false\n    Which is: false");
-}
-
-
-// Tests the StreamableToString() function.
-
-// Tests using StreamableToString() on a scalar.
-TEST(StreamableToStringTest, Scalar) {
-  EXPECT_STREQ("5", StreamableToString(5).c_str());
-}
-
-// Tests using StreamableToString() on a non-char pointer.
-TEST(StreamableToStringTest, Pointer) {
-  int n = 0;
-  int* p = &n;
-  EXPECT_STRNE("(null)", StreamableToString(p).c_str());
-}
-
-// Tests using StreamableToString() on a NULL non-char pointer.
-TEST(StreamableToStringTest, NullPointer) {
-  int* p = nullptr;
-  EXPECT_STREQ("(null)", StreamableToString(p).c_str());
-}
-
-// Tests using StreamableToString() on a C string.
-TEST(StreamableToStringTest, CString) {
-  EXPECT_STREQ("Foo", StreamableToString("Foo").c_str());
-}
-
-// Tests using StreamableToString() on a NULL C string.
-TEST(StreamableToStringTest, NullCString) {
-  char* p = nullptr;
-  EXPECT_STREQ("(null)", StreamableToString(p).c_str());
-}
-
-// Tests using streamable values as assertion messages.
-
-// Tests using std::string as an assertion message.
-TEST(StreamableTest, string) {
-  static const std::string str(
-      "This failure message is a std::string, and is expected.");
-  EXPECT_FATAL_FAILURE(FAIL() << str,
-                       str.c_str());
-}
-
-// Tests that we can output strings containing embedded NULs.
-// Limited to Linux because we can only do this with std::string's.
-TEST(StreamableTest, stringWithEmbeddedNUL) {
-  static const char char_array_with_nul[] =
-      "Here's a NUL\0 and some more string";
-  static const std::string string_with_nul(char_array_with_nul,
-                                           sizeof(char_array_with_nul)
-                                           - 1);  // drops the trailing NUL
-  EXPECT_FATAL_FAILURE(FAIL() << string_with_nul,
-                       "Here's a NUL\\0 and some more string");
-}
-
-// Tests that we can output a NUL char.
-TEST(StreamableTest, NULChar) {
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    FAIL() << "A NUL" << '\0' << " and some more string";
-  }, "A NUL\\0 and some more string");
-}
-
-// Tests using int as an assertion message.
-TEST(StreamableTest, int) {
-  EXPECT_FATAL_FAILURE(FAIL() << 900913,
-                       "900913");
-}
-
-// Tests using NULL char pointer as an assertion message.
-//
-// In MSVC, streaming a NULL char * causes access violation.  Google Test
-// implemented a workaround (substituting "(null)" for NULL).  This
-// tests whether the workaround works.
-TEST(StreamableTest, NullCharPtr) {
-  EXPECT_FATAL_FAILURE(FAIL() << static_cast<const char*>(nullptr), "(null)");
-}
-
-// Tests that basic IO manipulators (endl, ends, and flush) can be
-// streamed to testing::Message.
-TEST(StreamableTest, BasicIoManip) {
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    FAIL() << "Line 1." << std::endl
-           << "A NUL char " << std::ends << std::flush << " in line 2.";
-  }, "Line 1.\nA NUL char \\0 in line 2.");
-}
-
-// Tests the macros that haven't been covered so far.
-
-void AddFailureHelper(bool* aborted) {
-  *aborted = true;
-  ADD_FAILURE() << "Intentional failure.";
-  *aborted = false;
-}
-
-// Tests ADD_FAILURE.
-TEST(MacroTest, ADD_FAILURE) {
-  bool aborted = true;
-  EXPECT_NONFATAL_FAILURE(AddFailureHelper(&aborted),
-                          "Intentional failure.");
-  EXPECT_FALSE(aborted);
-}
-
-// Tests ADD_FAILURE_AT.
-TEST(MacroTest, ADD_FAILURE_AT) {
-  // Verifies that ADD_FAILURE_AT does generate a nonfatal failure and
-  // the failure message contains the user-streamed part.
-  EXPECT_NONFATAL_FAILURE(ADD_FAILURE_AT("foo.cc", 42) << "Wrong!", "Wrong!");
-
-  // Verifies that the user-streamed part is optional.
-  EXPECT_NONFATAL_FAILURE(ADD_FAILURE_AT("foo.cc", 42), "Failed");
-
-  // Unfortunately, we cannot verify that the failure message contains
-  // the right file path and line number the same way, as
-  // EXPECT_NONFATAL_FAILURE() doesn't get to see the file path and
-  // line number.  Instead, we do that in googletest-output-test_.cc.
-}
-
-// Tests FAIL.
-TEST(MacroTest, FAIL) {
-  EXPECT_FATAL_FAILURE(FAIL(),
-                       "Failed");
-  EXPECT_FATAL_FAILURE(FAIL() << "Intentional failure.",
-                       "Intentional failure.");
-}
-
-// Tests GTEST_FAIL_AT.
-TEST(MacroTest, GTEST_FAIL_AT) {
-  // Verifies that GTEST_FAIL_AT does generate a fatal failure and
-  // the failure message contains the user-streamed part.
-  EXPECT_FATAL_FAILURE(GTEST_FAIL_AT("foo.cc", 42) << "Wrong!", "Wrong!");
-
-  // Verifies that the user-streamed part is optional.
-  EXPECT_FATAL_FAILURE(GTEST_FAIL_AT("foo.cc", 42), "Failed");
-
-  // See the ADD_FAIL_AT test above to see how we test that the failure message
-  // contains the right filename and line number -- the same applies here.
-}
-
-// Tests SUCCEED
-TEST(MacroTest, SUCCEED) {
-  SUCCEED();
-  SUCCEED() << "Explicit success.";
-}
-
-// Tests for EXPECT_EQ() and ASSERT_EQ().
-//
-// These tests fail *intentionally*, s.t. the failure messages can be
-// generated and tested.
-//
-// We have different tests for different argument types.
-
-// Tests using bool values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, Bool) {
-  EXPECT_EQ(true,  true);
-  EXPECT_FATAL_FAILURE({
-      bool false_value = false;
-      ASSERT_EQ(false_value, true);
-    }, "  false_value\n    Which is: false\n  true");
-}
-
-// Tests using int values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, Int) {
-  ASSERT_EQ(32, 32);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(32, 33),
-                          "  32\n  33");
-}
-
-// Tests using time_t values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, Time_T) {
-  EXPECT_EQ(static_cast<time_t>(0),
-            static_cast<time_t>(0));
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(static_cast<time_t>(0),
-                                 static_cast<time_t>(1234)),
-                       "1234");
-}
-
-// Tests using char values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, Char) {
-  ASSERT_EQ('z', 'z');
-  const char ch = 'b';
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ('\0', ch),
-                          "  ch\n    Which is: 'b'");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ('a', ch),
-                          "  ch\n    Which is: 'b'");
-}
-
-// Tests using wchar_t values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, WideChar) {
-  EXPECT_EQ(L'b', L'b');
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(L'\0', L'x'),
-                          "Expected equality of these values:\n"
-                          "  L'\0'\n"
-                          "    Which is: L'\0' (0, 0x0)\n"
-                          "  L'x'\n"
-                          "    Which is: L'x' (120, 0x78)");
-
-  static wchar_t wchar;
-  wchar = L'b';
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(L'a', wchar),
-                          "wchar");
-  wchar = 0x8119;
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(static_cast<wchar_t>(0x8120), wchar),
-                       "  wchar\n    Which is: L'");
-}
-
-// Tests using ::std::string values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, StdString) {
-  // Compares a const char* to an std::string that has identical
-  // content.
-  ASSERT_EQ("Test", ::std::string("Test"));
-
-  // Compares two identical std::strings.
-  static const ::std::string str1("A * in the middle");
-  static const ::std::string str2(str1);
-  EXPECT_EQ(str1, str2);
-
-  // Compares a const char* to an std::string that has different
-  // content
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ("Test", ::std::string("test")),
-                          "\"test\"");
-
-  // Compares an std::string to a char* that has different content.
-  char* const p1 = const_cast<char*>("foo");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(::std::string("bar"), p1),
-                          "p1");
-
-  // Compares two std::strings that have different contents, one of
-  // which having a NUL character in the middle.  This should fail.
-  static ::std::string str3(str1);
-  str3.at(2) = '\0';
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(str1, str3),
-                       "  str3\n    Which is: \"A \\0 in the middle\"");
-}
-
-#if GTEST_HAS_STD_WSTRING
-
-// Tests using ::std::wstring values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, StdWideString) {
-  // Compares two identical std::wstrings.
-  const ::std::wstring wstr1(L"A * in the middle");
-  const ::std::wstring wstr2(wstr1);
-  ASSERT_EQ(wstr1, wstr2);
-
-  // Compares an std::wstring to a const wchar_t* that has identical
-  // content.
-  const wchar_t kTestX8119[] = { 'T', 'e', 's', 't', 0x8119, '\0' };
-  EXPECT_EQ(::std::wstring(kTestX8119), kTestX8119);
-
-  // Compares an std::wstring to a const wchar_t* that has different
-  // content.
-  const wchar_t kTestX8120[] = { 'T', 'e', 's', 't', 0x8120, '\0' };
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_EQ(::std::wstring(kTestX8119), kTestX8120);
-  }, "kTestX8120");
-
-  // Compares two std::wstrings that have different contents, one of
-  // which having a NUL character in the middle.
-  ::std::wstring wstr3(wstr1);
-  wstr3.at(2) = L'\0';
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(wstr1, wstr3),
-                          "wstr3");
-
-  // Compares a wchar_t* to an std::wstring that has different
-  // content.
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_EQ(const_cast<wchar_t*>(L"foo"), ::std::wstring(L"bar"));
-  }, "");
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Tests using char pointers in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, CharPointer) {
-  char* const p0 = nullptr;
-  // Only way to get the Nokia compiler to compile the cast
-  // is to have a separate void* variable first. Putting
-  // the two casts on the same line doesn't work, neither does
-  // a direct C-style to char*.
-  void* pv1 = (void*)0x1234;  // NOLINT
-  void* pv2 = (void*)0xABC0;  // NOLINT
-  char* const p1 = reinterpret_cast<char*>(pv1);
-  char* const p2 = reinterpret_cast<char*>(pv2);
-  ASSERT_EQ(p1, p1);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p0, p2),
-                          "  p2\n    Which is:");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p1, p2),
-                          "  p2\n    Which is:");
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(reinterpret_cast<char*>(0x1234),
-                                 reinterpret_cast<char*>(0xABC0)),
-                       "ABC0");
-}
-
-// Tests using wchar_t pointers in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, WideCharPointer) {
-  wchar_t* const p0 = nullptr;
-  // Only way to get the Nokia compiler to compile the cast
-  // is to have a separate void* variable first. Putting
-  // the two casts on the same line doesn't work, neither does
-  // a direct C-style to char*.
-  void* pv1 = (void*)0x1234;  // NOLINT
-  void* pv2 = (void*)0xABC0;  // NOLINT
-  wchar_t* const p1 = reinterpret_cast<wchar_t*>(pv1);
-  wchar_t* const p2 = reinterpret_cast<wchar_t*>(pv2);
-  EXPECT_EQ(p0, p0);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p0, p2),
-                          "  p2\n    Which is:");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p1, p2),
-                          "  p2\n    Which is:");
-  void* pv3 = (void*)0x1234;  // NOLINT
-  void* pv4 = (void*)0xABC0;  // NOLINT
-  const wchar_t* p3 = reinterpret_cast<const wchar_t*>(pv3);
-  const wchar_t* p4 = reinterpret_cast<const wchar_t*>(pv4);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p3, p4),
-                          "p4");
-}
-
-// Tests using other types of pointers in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, OtherPointer) {
-  ASSERT_EQ(static_cast<const int*>(nullptr), static_cast<const int*>(nullptr));
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(static_cast<const int*>(nullptr),
-                                 reinterpret_cast<const int*>(0x1234)),
-                       "0x1234");
-}
-
-// A class that supports binary comparison operators but not streaming.
-class UnprintableChar {
- public:
-  explicit UnprintableChar(char ch) : char_(ch) {}
-
-  bool operator==(const UnprintableChar& rhs) const {
-    return char_ == rhs.char_;
-  }
-  bool operator!=(const UnprintableChar& rhs) const {
-    return char_ != rhs.char_;
-  }
-  bool operator<(const UnprintableChar& rhs) const {
-    return char_ < rhs.char_;
-  }
-  bool operator<=(const UnprintableChar& rhs) const {
-    return char_ <= rhs.char_;
-  }
-  bool operator>(const UnprintableChar& rhs) const {
-    return char_ > rhs.char_;
-  }
-  bool operator>=(const UnprintableChar& rhs) const {
-    return char_ >= rhs.char_;
-  }
-
- private:
-  char char_;
-};
-
-// Tests that ASSERT_EQ() and friends don't require the arguments to
-// be printable.
-TEST(ComparisonAssertionTest, AcceptsUnprintableArgs) {
-  const UnprintableChar x('x'), y('y');
-  ASSERT_EQ(x, x);
-  EXPECT_NE(x, y);
-  ASSERT_LT(x, y);
-  EXPECT_LE(x, y);
-  ASSERT_GT(y, x);
-  EXPECT_GE(x, x);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(x, y), "1-byte object <78>");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(x, y), "1-byte object <79>");
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(y, y), "1-byte object <79>");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(x, y), "1-byte object <78>");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(x, y), "1-byte object <79>");
-
-  // Code tested by EXPECT_FATAL_FAILURE cannot reference local
-  // variables, so we have to write UnprintableChar('x') instead of x.
-#ifndef __BORLANDC__
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE(ASSERT_NE(UnprintableChar('x'), UnprintableChar('x')),
-                       "1-byte object <78>");
-  EXPECT_FATAL_FAILURE(ASSERT_LE(UnprintableChar('y'), UnprintableChar('x')),
-                       "1-byte object <78>");
-#endif
-  EXPECT_FATAL_FAILURE(ASSERT_LE(UnprintableChar('y'), UnprintableChar('x')),
-                       "1-byte object <79>");
-  EXPECT_FATAL_FAILURE(ASSERT_GE(UnprintableChar('x'), UnprintableChar('y')),
-                       "1-byte object <78>");
-  EXPECT_FATAL_FAILURE(ASSERT_GE(UnprintableChar('x'), UnprintableChar('y')),
-                       "1-byte object <79>");
-}
-
-// Tests the FRIEND_TEST macro.
-
-// This class has a private member we want to test.  We will test it
-// both in a TEST and in a TEST_F.
-class Foo {
- public:
-  Foo() {}
-
- private:
-  int Bar() const { return 1; }
-
-  // Declares the friend tests that can access the private member
-  // Bar().
-  FRIEND_TEST(FRIEND_TEST_Test, TEST);
-  FRIEND_TEST(FRIEND_TEST_Test2, TEST_F);
-};
-
-// Tests that the FRIEND_TEST declaration allows a TEST to access a
-// class's private members.  This should compile.
-TEST(FRIEND_TEST_Test, TEST) {
-  ASSERT_EQ(1, Foo().Bar());
-}
-
-// The fixture needed to test using FRIEND_TEST with TEST_F.
-class FRIEND_TEST_Test2 : public Test {
- protected:
-  Foo foo;
-};
-
-// Tests that the FRIEND_TEST declaration allows a TEST_F to access a
-// class's private members.  This should compile.
-TEST_F(FRIEND_TEST_Test2, TEST_F) {
-  ASSERT_EQ(1, foo.Bar());
-}
-
-// Tests the life cycle of Test objects.
-
-// The test fixture for testing the life cycle of Test objects.
-//
-// This class counts the number of live test objects that uses this
-// fixture.
-class TestLifeCycleTest : public Test {
- protected:
-  // Constructor.  Increments the number of test objects that uses
-  // this fixture.
-  TestLifeCycleTest() { count_++; }
-
-  // Destructor.  Decrements the number of test objects that uses this
-  // fixture.
-  ~TestLifeCycleTest() override { count_--; }
-
-  // Returns the number of live test objects that uses this fixture.
-  int count() const { return count_; }
-
- private:
-  static int count_;
-};
-
-int TestLifeCycleTest::count_ = 0;
-
-// Tests the life cycle of test objects.
-TEST_F(TestLifeCycleTest, Test1) {
-  // There should be only one test object in this test case that's
-  // currently alive.
-  ASSERT_EQ(1, count());
-}
-
-// Tests the life cycle of test objects.
-TEST_F(TestLifeCycleTest, Test2) {
-  // After Test1 is done and Test2 is started, there should still be
-  // only one live test object, as the object for Test1 should've been
-  // deleted.
-  ASSERT_EQ(1, count());
-}
-
-}  // namespace
-
-// Tests that the copy constructor works when it is NOT optimized away by
-// the compiler.
-TEST(AssertionResultTest, CopyConstructorWorksWhenNotOptimied) {
-  // Checks that the copy constructor doesn't try to dereference NULL pointers
-  // in the source object.
-  AssertionResult r1 = AssertionSuccess();
-  AssertionResult r2 = r1;
-  // The following line is added to prevent the compiler from optimizing
-  // away the constructor call.
-  r1 << "abc";
-
-  AssertionResult r3 = r1;
-  EXPECT_EQ(static_cast<bool>(r3), static_cast<bool>(r1));
-  EXPECT_STREQ("abc", r1.message());
-}
-
-// Tests that AssertionSuccess and AssertionFailure construct
-// AssertionResult objects as expected.
-TEST(AssertionResultTest, ConstructionWorks) {
-  AssertionResult r1 = AssertionSuccess();
-  EXPECT_TRUE(r1);
-  EXPECT_STREQ("", r1.message());
-
-  AssertionResult r2 = AssertionSuccess() << "abc";
-  EXPECT_TRUE(r2);
-  EXPECT_STREQ("abc", r2.message());
-
-  AssertionResult r3 = AssertionFailure();
-  EXPECT_FALSE(r3);
-  EXPECT_STREQ("", r3.message());
-
-  AssertionResult r4 = AssertionFailure() << "def";
-  EXPECT_FALSE(r4);
-  EXPECT_STREQ("def", r4.message());
-
-  AssertionResult r5 = AssertionFailure(Message() << "ghi");
-  EXPECT_FALSE(r5);
-  EXPECT_STREQ("ghi", r5.message());
-}
-
-// Tests that the negation flips the predicate result but keeps the message.
-TEST(AssertionResultTest, NegationWorks) {
-  AssertionResult r1 = AssertionSuccess() << "abc";
-  EXPECT_FALSE(!r1);
-  EXPECT_STREQ("abc", (!r1).message());
-
-  AssertionResult r2 = AssertionFailure() << "def";
-  EXPECT_TRUE(!r2);
-  EXPECT_STREQ("def", (!r2).message());
-}
-
-TEST(AssertionResultTest, StreamingWorks) {
-  AssertionResult r = AssertionSuccess();
-  r << "abc" << 'd' << 0 << true;
-  EXPECT_STREQ("abcd0true", r.message());
-}
-
-TEST(AssertionResultTest, CanStreamOstreamManipulators) {
-  AssertionResult r = AssertionSuccess();
-  r << "Data" << std::endl << std::flush << std::ends << "Will be visible";
-  EXPECT_STREQ("Data\n\\0Will be visible", r.message());
-}
-
-// The next test uses explicit conversion operators
-
-TEST(AssertionResultTest, ConstructibleFromContextuallyConvertibleToBool) {
-  struct ExplicitlyConvertibleToBool {
-    explicit operator bool() const { return value; }
-    bool value;
-  };
-  ExplicitlyConvertibleToBool v1 = {false};
-  ExplicitlyConvertibleToBool v2 = {true};
-  EXPECT_FALSE(v1);
-  EXPECT_TRUE(v2);
-}
-
-struct ConvertibleToAssertionResult {
-  operator AssertionResult() const { return AssertionResult(true); }
-};
-
-TEST(AssertionResultTest, ConstructibleFromImplicitlyConvertible) {
-  ConvertibleToAssertionResult obj;
-  EXPECT_TRUE(obj);
-}
-
-// Tests streaming a user type whose definition and operator << are
-// both in the global namespace.
-class Base {
- public:
-  explicit Base(int an_x) : x_(an_x) {}
-  int x() const { return x_; }
- private:
-  int x_;
-};
-std::ostream& operator<<(std::ostream& os,
-                         const Base& val) {
-  return os << val.x();
-}
-std::ostream& operator<<(std::ostream& os,
-                         const Base* pointer) {
-  return os << "(" << pointer->x() << ")";
-}
-
-TEST(MessageTest, CanStreamUserTypeInGlobalNameSpace) {
-  Message msg;
-  Base a(1);
-
-  msg << a << &a;  // Uses ::operator<<.
-  EXPECT_STREQ("1(1)", msg.GetString().c_str());
-}
-
-// Tests streaming a user type whose definition and operator<< are
-// both in an unnamed namespace.
-namespace {
-class MyTypeInUnnamedNameSpace : public Base {
- public:
-  explicit MyTypeInUnnamedNameSpace(int an_x): Base(an_x) {}
-};
-std::ostream& operator<<(std::ostream& os,
-                         const MyTypeInUnnamedNameSpace& val) {
-  return os << val.x();
-}
-std::ostream& operator<<(std::ostream& os,
-                         const MyTypeInUnnamedNameSpace* pointer) {
-  return os << "(" << pointer->x() << ")";
-}
-}  // namespace
-
-TEST(MessageTest, CanStreamUserTypeInUnnamedNameSpace) {
-  Message msg;
-  MyTypeInUnnamedNameSpace a(1);
-
-  msg << a << &a;  // Uses <unnamed_namespace>::operator<<.
-  EXPECT_STREQ("1(1)", msg.GetString().c_str());
-}
-
-// Tests streaming a user type whose definition and operator<< are
-// both in a user namespace.
-namespace namespace1 {
-class MyTypeInNameSpace1 : public Base {
- public:
-  explicit MyTypeInNameSpace1(int an_x): Base(an_x) {}
-};
-std::ostream& operator<<(std::ostream& os,
-                         const MyTypeInNameSpace1& val) {
-  return os << val.x();
-}
-std::ostream& operator<<(std::ostream& os,
-                         const MyTypeInNameSpace1* pointer) {
-  return os << "(" << pointer->x() << ")";
-}
-}  // namespace namespace1
-
-TEST(MessageTest, CanStreamUserTypeInUserNameSpace) {
-  Message msg;
-  namespace1::MyTypeInNameSpace1 a(1);
-
-  msg << a << &a;  // Uses namespace1::operator<<.
-  EXPECT_STREQ("1(1)", msg.GetString().c_str());
-}
-
-// Tests streaming a user type whose definition is in a user namespace
-// but whose operator<< is in the global namespace.
-namespace namespace2 {
-class MyTypeInNameSpace2 : public ::Base {
- public:
-  explicit MyTypeInNameSpace2(int an_x): Base(an_x) {}
-};
-}  // namespace namespace2
-std::ostream& operator<<(std::ostream& os,
-                         const namespace2::MyTypeInNameSpace2& val) {
-  return os << val.x();
-}
-std::ostream& operator<<(std::ostream& os,
-                         const namespace2::MyTypeInNameSpace2* pointer) {
-  return os << "(" << pointer->x() << ")";
-}
-
-TEST(MessageTest, CanStreamUserTypeInUserNameSpaceWithStreamOperatorInGlobal) {
-  Message msg;
-  namespace2::MyTypeInNameSpace2 a(1);
-
-  msg << a << &a;  // Uses ::operator<<.
-  EXPECT_STREQ("1(1)", msg.GetString().c_str());
-}
-
-// Tests streaming NULL pointers to testing::Message.
-TEST(MessageTest, NullPointers) {
-  Message msg;
-  char* const p1 = nullptr;
-  unsigned char* const p2 = nullptr;
-  int* p3 = nullptr;
-  double* p4 = nullptr;
-  bool* p5 = nullptr;
-  Message* p6 = nullptr;
-
-  msg << p1 << p2 << p3 << p4 << p5 << p6;
-  ASSERT_STREQ("(null)(null)(null)(null)(null)(null)",
-               msg.GetString().c_str());
-}
-
-// Tests streaming wide strings to testing::Message.
-TEST(MessageTest, WideStrings) {
-  // Streams a NULL of type const wchar_t*.
-  const wchar_t* const_wstr = nullptr;
-  EXPECT_STREQ("(null)",
-               (Message() << const_wstr).GetString().c_str());
-
-  // Streams a NULL of type wchar_t*.
-  wchar_t* wstr = nullptr;
-  EXPECT_STREQ("(null)",
-               (Message() << wstr).GetString().c_str());
-
-  // Streams a non-NULL of type const wchar_t*.
-  const_wstr = L"abc\x8119";
-  EXPECT_STREQ("abc\xe8\x84\x99",
-               (Message() << const_wstr).GetString().c_str());
-
-  // Streams a non-NULL of type wchar_t*.
-  wstr = const_cast<wchar_t*>(const_wstr);
-  EXPECT_STREQ("abc\xe8\x84\x99",
-               (Message() << wstr).GetString().c_str());
-}
-
-
-// This line tests that we can define tests in the testing namespace.
-namespace testing {
-
-// Tests the TestInfo class.
-
-class TestInfoTest : public Test {
- protected:
-  static const TestInfo* GetTestInfo(const char* test_name) {
-    const TestSuite* const test_suite =
-        GetUnitTestImpl()->GetTestSuite("TestInfoTest", "", nullptr, nullptr);
-
-    for (int i = 0; i < test_suite->total_test_count(); ++i) {
-      const TestInfo* const test_info = test_suite->GetTestInfo(i);
-      if (strcmp(test_name, test_info->name()) == 0)
-        return test_info;
-    }
-    return nullptr;
-  }
-
-  static const TestResult* GetTestResult(
-      const TestInfo* test_info) {
-    return test_info->result();
-  }
-};
-
-// Tests TestInfo::test_case_name() and TestInfo::name().
-TEST_F(TestInfoTest, Names) {
-  const TestInfo* const test_info = GetTestInfo("Names");
-
-  ASSERT_STREQ("TestInfoTest", test_info->test_case_name());
-  ASSERT_STREQ("Names", test_info->name());
-}
-
-// Tests TestInfo::result().
-TEST_F(TestInfoTest, result) {
-  const TestInfo* const test_info = GetTestInfo("result");
-
-  // Initially, there is no TestPartResult for this test.
-  ASSERT_EQ(0, GetTestResult(test_info)->total_part_count());
-
-  // After the previous assertion, there is still none.
-  ASSERT_EQ(0, GetTestResult(test_info)->total_part_count());
-}
-
-#define VERIFY_CODE_LOCATION \
-  const int expected_line = __LINE__ - 1; \
-  const TestInfo* const test_info = GetUnitTestImpl()->current_test_info(); \
-  ASSERT_TRUE(test_info); \
-  EXPECT_STREQ(__FILE__, test_info->file()); \
-  EXPECT_EQ(expected_line, test_info->line())
-
-TEST(CodeLocationForTEST, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-class CodeLocationForTESTF : public Test {
-};
-
-TEST_F(CodeLocationForTESTF, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-class CodeLocationForTESTP : public TestWithParam<int> {
-};
-
-TEST_P(CodeLocationForTESTP, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-INSTANTIATE_TEST_SUITE_P(, CodeLocationForTESTP, Values(0));
-
-template <typename T>
-class CodeLocationForTYPEDTEST : public Test {
-};
-
-TYPED_TEST_SUITE(CodeLocationForTYPEDTEST, int);
-
-TYPED_TEST(CodeLocationForTYPEDTEST, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-template <typename T>
-class CodeLocationForTYPEDTESTP : public Test {
-};
-
-TYPED_TEST_SUITE_P(CodeLocationForTYPEDTESTP);
-
-TYPED_TEST_P(CodeLocationForTYPEDTESTP, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-REGISTER_TYPED_TEST_SUITE_P(CodeLocationForTYPEDTESTP, Verify);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, CodeLocationForTYPEDTESTP, int);
-
-#undef VERIFY_CODE_LOCATION
-
-// Tests setting up and tearing down a test case.
-// Legacy API is deprecated but still available
-#ifndef REMOVE_LEGACY_TEST_CASEAPI
-class SetUpTestCaseTest : public Test {
- protected:
-  // This will be called once before the first test in this test case
-  // is run.
-  static void SetUpTestCase() {
-    printf("Setting up the test case . . .\n");
-
-    // Initializes some shared resource.  In this simple example, we
-    // just create a C string.  More complex stuff can be done if
-    // desired.
-    shared_resource_ = "123";
-
-    // Increments the number of test cases that have been set up.
-    counter_++;
-
-    // SetUpTestCase() should be called only once.
-    EXPECT_EQ(1, counter_);
-  }
-
-  // This will be called once after the last test in this test case is
-  // run.
-  static void TearDownTestCase() {
-    printf("Tearing down the test case . . .\n");
-
-    // Decrements the number of test cases that have been set up.
-    counter_--;
-
-    // TearDownTestCase() should be called only once.
-    EXPECT_EQ(0, counter_);
-
-    // Cleans up the shared resource.
-    shared_resource_ = nullptr;
-  }
-
-  // This will be called before each test in this test case.
-  void SetUp() override {
-    // SetUpTestCase() should be called only once, so counter_ should
-    // always be 1.
-    EXPECT_EQ(1, counter_);
-  }
-
-  // Number of test cases that have been set up.
-  static int counter_;
-
-  // Some resource to be shared by all tests in this test case.
-  static const char* shared_resource_;
-};
-
-int SetUpTestCaseTest::counter_ = 0;
-const char* SetUpTestCaseTest::shared_resource_ = nullptr;
-
-// A test that uses the shared resource.
-TEST_F(SetUpTestCaseTest, Test1) { EXPECT_STRNE(nullptr, shared_resource_); }
-
-// Another test that uses the shared resource.
-TEST_F(SetUpTestCaseTest, Test2) {
-  EXPECT_STREQ("123", shared_resource_);
-}
-#endif  //  REMOVE_LEGACY_TEST_CASEAPI
-
-// Tests SetupTestSuite/TearDown TestSuite
-class SetUpTestSuiteTest : public Test {
- protected:
-  // This will be called once before the first test in this test case
-  // is run.
-  static void SetUpTestSuite() {
-    printf("Setting up the test suite . . .\n");
-
-    // Initializes some shared resource.  In this simple example, we
-    // just create a C string.  More complex stuff can be done if
-    // desired.
-    shared_resource_ = "123";
-
-    // Increments the number of test cases that have been set up.
-    counter_++;
-
-    // SetUpTestSuite() should be called only once.
-    EXPECT_EQ(1, counter_);
-  }
-
-  // This will be called once after the last test in this test case is
-  // run.
-  static void TearDownTestSuite() {
-    printf("Tearing down the test suite . . .\n");
-
-    // Decrements the number of test suites that have been set up.
-    counter_--;
-
-    // TearDownTestSuite() should be called only once.
-    EXPECT_EQ(0, counter_);
-
-    // Cleans up the shared resource.
-    shared_resource_ = nullptr;
-  }
-
-  // This will be called before each test in this test case.
-  void SetUp() override {
-    // SetUpTestSuite() should be called only once, so counter_ should
-    // always be 1.
-    EXPECT_EQ(1, counter_);
-  }
-
-  // Number of test suites that have been set up.
-  static int counter_;
-
-  // Some resource to be shared by all tests in this test case.
-  static const char* shared_resource_;
-};
-
-int SetUpTestSuiteTest::counter_ = 0;
-const char* SetUpTestSuiteTest::shared_resource_ = nullptr;
-
-// A test that uses the shared resource.
-TEST_F(SetUpTestSuiteTest, TestSetupTestSuite1) {
-  EXPECT_STRNE(nullptr, shared_resource_);
-}
-
-// Another test that uses the shared resource.
-TEST_F(SetUpTestSuiteTest, TestSetupTestSuite2) {
-  EXPECT_STREQ("123", shared_resource_);
-}
-
-// The ParseFlagsTest test case tests ParseGoogleTestFlagsOnly.
-
-// The Flags struct stores a copy of all Google Test flags.
-struct Flags {
-  // Constructs a Flags struct where each flag has its default value.
-  Flags() : also_run_disabled_tests(false),
-            break_on_failure(false),
-            catch_exceptions(false),
-            death_test_use_fork(false),
-            filter(""),
-            list_tests(false),
-            output(""),
-            print_time(true),
-            random_seed(0),
-            repeat(1),
-            shuffle(false),
-            stack_trace_depth(kMaxStackTraceDepth),
-            stream_result_to(""),
-            throw_on_failure(false) {}
-
-  // Factory methods.
-
-  // Creates a Flags struct where the gtest_also_run_disabled_tests flag has
-  // the given value.
-  static Flags AlsoRunDisabledTests(bool also_run_disabled_tests) {
-    Flags flags;
-    flags.also_run_disabled_tests = also_run_disabled_tests;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_break_on_failure flag has
-  // the given value.
-  static Flags BreakOnFailure(bool break_on_failure) {
-    Flags flags;
-    flags.break_on_failure = break_on_failure;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_catch_exceptions flag has
-  // the given value.
-  static Flags CatchExceptions(bool catch_exceptions) {
-    Flags flags;
-    flags.catch_exceptions = catch_exceptions;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_death_test_use_fork flag has
-  // the given value.
-  static Flags DeathTestUseFork(bool death_test_use_fork) {
-    Flags flags;
-    flags.death_test_use_fork = death_test_use_fork;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_filter flag has the given
-  // value.
-  static Flags Filter(const char* filter) {
-    Flags flags;
-    flags.filter = filter;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_list_tests flag has the
-  // given value.
-  static Flags ListTests(bool list_tests) {
-    Flags flags;
-    flags.list_tests = list_tests;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_output flag has the given
-  // value.
-  static Flags Output(const char* output) {
-    Flags flags;
-    flags.output = output;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_print_time flag has the given
-  // value.
-  static Flags PrintTime(bool print_time) {
-    Flags flags;
-    flags.print_time = print_time;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_random_seed flag has the given
-  // value.
-  static Flags RandomSeed(Int32 random_seed) {
-    Flags flags;
-    flags.random_seed = random_seed;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_repeat flag has the given
-  // value.
-  static Flags Repeat(Int32 repeat) {
-    Flags flags;
-    flags.repeat = repeat;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_shuffle flag has the given
-  // value.
-  static Flags Shuffle(bool shuffle) {
-    Flags flags;
-    flags.shuffle = shuffle;
-    return flags;
-  }
-
-  // Creates a Flags struct where the GTEST_FLAG(stack_trace_depth) flag has
-  // the given value.
-  static Flags StackTraceDepth(Int32 stack_trace_depth) {
-    Flags flags;
-    flags.stack_trace_depth = stack_trace_depth;
-    return flags;
-  }
-
-  // Creates a Flags struct where the GTEST_FLAG(stream_result_to) flag has
-  // the given value.
-  static Flags StreamResultTo(const char* stream_result_to) {
-    Flags flags;
-    flags.stream_result_to = stream_result_to;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_throw_on_failure flag has
-  // the given value.
-  static Flags ThrowOnFailure(bool throw_on_failure) {
-    Flags flags;
-    flags.throw_on_failure = throw_on_failure;
-    return flags;
-  }
-
-  // These fields store the flag values.
-  bool also_run_disabled_tests;
-  bool break_on_failure;
-  bool catch_exceptions;
-  bool death_test_use_fork;
-  const char* filter;
-  bool list_tests;
-  const char* output;
-  bool print_time;
-  Int32 random_seed;
-  Int32 repeat;
-  bool shuffle;
-  Int32 stack_trace_depth;
-  const char* stream_result_to;
-  bool throw_on_failure;
-};
-
-// Fixture for testing ParseGoogleTestFlagsOnly().
-class ParseFlagsTest : public Test {
- protected:
-  // Clears the flags before each test.
-  void SetUp() override {
-    GTEST_FLAG(also_run_disabled_tests) = false;
-    GTEST_FLAG(break_on_failure) = false;
-    GTEST_FLAG(catch_exceptions) = false;
-    GTEST_FLAG(death_test_use_fork) = false;
-    GTEST_FLAG(filter) = "";
-    GTEST_FLAG(list_tests) = false;
-    GTEST_FLAG(output) = "";
-    GTEST_FLAG(print_time) = true;
-    GTEST_FLAG(random_seed) = 0;
-    GTEST_FLAG(repeat) = 1;
-    GTEST_FLAG(shuffle) = false;
-    GTEST_FLAG(stack_trace_depth) = kMaxStackTraceDepth;
-    GTEST_FLAG(stream_result_to) = "";
-    GTEST_FLAG(throw_on_failure) = false;
-  }
-
-  // Asserts that two narrow or wide string arrays are equal.
-  template <typename CharType>
-  static void AssertStringArrayEq(int size1, CharType** array1, int size2,
-                                  CharType** array2) {
-    ASSERT_EQ(size1, size2) << " Array sizes different.";
-
-    for (int i = 0; i != size1; i++) {
-      ASSERT_STREQ(array1[i], array2[i]) << " where i == " << i;
-    }
-  }
-
-  // Verifies that the flag values match the expected values.
-  static void CheckFlags(const Flags& expected) {
-    EXPECT_EQ(expected.also_run_disabled_tests,
-              GTEST_FLAG(also_run_disabled_tests));
-    EXPECT_EQ(expected.break_on_failure, GTEST_FLAG(break_on_failure));
-    EXPECT_EQ(expected.catch_exceptions, GTEST_FLAG(catch_exceptions));
-    EXPECT_EQ(expected.death_test_use_fork, GTEST_FLAG(death_test_use_fork));
-    EXPECT_STREQ(expected.filter, GTEST_FLAG(filter).c_str());
-    EXPECT_EQ(expected.list_tests, GTEST_FLAG(list_tests));
-    EXPECT_STREQ(expected.output, GTEST_FLAG(output).c_str());
-    EXPECT_EQ(expected.print_time, GTEST_FLAG(print_time));
-    EXPECT_EQ(expected.random_seed, GTEST_FLAG(random_seed));
-    EXPECT_EQ(expected.repeat, GTEST_FLAG(repeat));
-    EXPECT_EQ(expected.shuffle, GTEST_FLAG(shuffle));
-    EXPECT_EQ(expected.stack_trace_depth, GTEST_FLAG(stack_trace_depth));
-    EXPECT_STREQ(expected.stream_result_to,
-                 GTEST_FLAG(stream_result_to).c_str());
-    EXPECT_EQ(expected.throw_on_failure, GTEST_FLAG(throw_on_failure));
-  }
-
-  // Parses a command line (specified by argc1 and argv1), then
-  // verifies that the flag values are expected and that the
-  // recognized flags are removed from the command line.
-  template <typename CharType>
-  static void TestParsingFlags(int argc1, const CharType** argv1,
-                               int argc2, const CharType** argv2,
-                               const Flags& expected, bool should_print_help) {
-    const bool saved_help_flag = ::testing::internal::g_help_flag;
-    ::testing::internal::g_help_flag = false;
-
-# if GTEST_HAS_STREAM_REDIRECTION
-    CaptureStdout();
-# endif
-
-    // Parses the command line.
-    internal::ParseGoogleTestFlagsOnly(&argc1, const_cast<CharType**>(argv1));
-
-# if GTEST_HAS_STREAM_REDIRECTION
-    const std::string captured_stdout = GetCapturedStdout();
-# endif
-
-    // Verifies the flag values.
-    CheckFlags(expected);
-
-    // Verifies that the recognized flags are removed from the command
-    // line.
-    AssertStringArrayEq(argc1 + 1, argv1, argc2 + 1, argv2);
-
-    // ParseGoogleTestFlagsOnly should neither set g_help_flag nor print the
-    // help message for the flags it recognizes.
-    EXPECT_EQ(should_print_help, ::testing::internal::g_help_flag);
-
-# if GTEST_HAS_STREAM_REDIRECTION
-    const char* const expected_help_fragment =
-        "This program contains tests written using";
-    if (should_print_help) {
-      EXPECT_PRED_FORMAT2(IsSubstring, expected_help_fragment, captured_stdout);
-    } else {
-      EXPECT_PRED_FORMAT2(IsNotSubstring,
-                          expected_help_fragment, captured_stdout);
-    }
-# endif  // GTEST_HAS_STREAM_REDIRECTION
-
-    ::testing::internal::g_help_flag = saved_help_flag;
-  }
-
-  // This macro wraps TestParsingFlags s.t. the user doesn't need
-  // to specify the array sizes.
-
-# define GTEST_TEST_PARSING_FLAGS_(argv1, argv2, expected, should_print_help) \
-  TestParsingFlags(sizeof(argv1)/sizeof(*argv1) - 1, argv1, \
-                   sizeof(argv2)/sizeof(*argv2) - 1, argv2, \
-                   expected, should_print_help)
-};
-
-// Tests parsing an empty command line.
-TEST_F(ParseFlagsTest, Empty) {
-  const char* argv[] = {nullptr};
-
-  const char* argv2[] = {nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags(), false);
-}
-
-// Tests parsing a command line that has no flag.
-TEST_F(ParseFlagsTest, NoFlag) {
-  const char* argv[] = {"foo.exe", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags(), false);
-}
-
-// Tests parsing a bad --gtest_filter flag.
-TEST_F(ParseFlagsTest, FilterBad) {
-  const char* argv[] = {"foo.exe", "--gtest_filter", nullptr};
-
-  const char* argv2[] = {"foo.exe", "--gtest_filter", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter(""), true);
-}
-
-// Tests parsing an empty --gtest_filter flag.
-TEST_F(ParseFlagsTest, FilterEmpty) {
-  const char* argv[] = {"foo.exe", "--gtest_filter=", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter(""), false);
-}
-
-// Tests parsing a non-empty --gtest_filter flag.
-TEST_F(ParseFlagsTest, FilterNonEmpty) {
-  const char* argv[] = {"foo.exe", "--gtest_filter=abc", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter("abc"), false);
-}
-
-// Tests parsing --gtest_break_on_failure.
-TEST_F(ParseFlagsTest, BreakOnFailureWithoutValue) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(true), false);
-}
-
-// Tests parsing --gtest_break_on_failure=0.
-TEST_F(ParseFlagsTest, BreakOnFailureFalse_0) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(false), false);
-}
-
-// Tests parsing --gtest_break_on_failure=f.
-TEST_F(ParseFlagsTest, BreakOnFailureFalse_f) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure=f", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(false), false);
-}
-
-// Tests parsing --gtest_break_on_failure=F.
-TEST_F(ParseFlagsTest, BreakOnFailureFalse_F) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure=F", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(false), false);
-}
-
-// Tests parsing a --gtest_break_on_failure flag that has a "true"
-// definition.
-TEST_F(ParseFlagsTest, BreakOnFailureTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(true), false);
-}
-
-// Tests parsing --gtest_catch_exceptions.
-TEST_F(ParseFlagsTest, CatchExceptions) {
-  const char* argv[] = {"foo.exe", "--gtest_catch_exceptions", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::CatchExceptions(true), false);
-}
-
-// Tests parsing --gtest_death_test_use_fork.
-TEST_F(ParseFlagsTest, DeathTestUseFork) {
-  const char* argv[] = {"foo.exe", "--gtest_death_test_use_fork", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::DeathTestUseFork(true), false);
-}
-
-// Tests having the same flag twice with different values.  The
-// expected behavior is that the one coming last takes precedence.
-TEST_F(ParseFlagsTest, DuplicatedFlags) {
-  const char* argv[] = {"foo.exe", "--gtest_filter=a", "--gtest_filter=b",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter("b"), false);
-}
-
-// Tests having an unrecognized flag on the command line.
-TEST_F(ParseFlagsTest, UnrecognizedFlag) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure",
-                        "bar",  // Unrecognized by Google Test.
-                        "--gtest_filter=b", nullptr};
-
-  const char* argv2[] = {"foo.exe", "bar", nullptr};
-
-  Flags flags;
-  flags.break_on_failure = true;
-  flags.filter = "b";
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, flags, false);
-}
-
-// Tests having a --gtest_list_tests flag
-TEST_F(ParseFlagsTest, ListTestsFlag) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(true), false);
-}
-
-// Tests having a --gtest_list_tests flag with a "true" value
-TEST_F(ParseFlagsTest, ListTestsTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(true), false);
-}
-
-// Tests having a --gtest_list_tests flag with a "false" value
-TEST_F(ParseFlagsTest, ListTestsFalse) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(false), false);
-}
-
-// Tests parsing --gtest_list_tests=f.
-TEST_F(ParseFlagsTest, ListTestsFalse_f) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests=f", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(false), false);
-}
-
-// Tests parsing --gtest_list_tests=F.
-TEST_F(ParseFlagsTest, ListTestsFalse_F) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests=F", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(false), false);
-}
-
-// Tests parsing --gtest_output (invalid).
-TEST_F(ParseFlagsTest, OutputEmpty) {
-  const char* argv[] = {"foo.exe", "--gtest_output", nullptr};
-
-  const char* argv2[] = {"foo.exe", "--gtest_output", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags(), true);
-}
-
-// Tests parsing --gtest_output=xml
-TEST_F(ParseFlagsTest, OutputXml) {
-  const char* argv[] = {"foo.exe", "--gtest_output=xml", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Output("xml"), false);
-}
-
-// Tests parsing --gtest_output=xml:file
-TEST_F(ParseFlagsTest, OutputXmlFile) {
-  const char* argv[] = {"foo.exe", "--gtest_output=xml:file", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Output("xml:file"), false);
-}
-
-// Tests parsing --gtest_output=xml:directory/path/
-TEST_F(ParseFlagsTest, OutputXmlDirectory) {
-  const char* argv[] = {"foo.exe", "--gtest_output=xml:directory/path/",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2,
-                            Flags::Output("xml:directory/path/"), false);
-}
-
-// Tests having a --gtest_print_time flag
-TEST_F(ParseFlagsTest, PrintTimeFlag) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(true), false);
-}
-
-// Tests having a --gtest_print_time flag with a "true" value
-TEST_F(ParseFlagsTest, PrintTimeTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(true), false);
-}
-
-// Tests having a --gtest_print_time flag with a "false" value
-TEST_F(ParseFlagsTest, PrintTimeFalse) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(false), false);
-}
-
-// Tests parsing --gtest_print_time=f.
-TEST_F(ParseFlagsTest, PrintTimeFalse_f) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time=f", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(false), false);
-}
-
-// Tests parsing --gtest_print_time=F.
-TEST_F(ParseFlagsTest, PrintTimeFalse_F) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time=F", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(false), false);
-}
-
-// Tests parsing --gtest_random_seed=number
-TEST_F(ParseFlagsTest, RandomSeed) {
-  const char* argv[] = {"foo.exe", "--gtest_random_seed=1000", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::RandomSeed(1000), false);
-}
-
-// Tests parsing --gtest_repeat=number
-TEST_F(ParseFlagsTest, Repeat) {
-  const char* argv[] = {"foo.exe", "--gtest_repeat=1000", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Repeat(1000), false);
-}
-
-// Tests having a --gtest_also_run_disabled_tests flag
-TEST_F(ParseFlagsTest, AlsoRunDisabledTestsFlag) {
-  const char* argv[] = {"foo.exe", "--gtest_also_run_disabled_tests", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::AlsoRunDisabledTests(true),
-                            false);
-}
-
-// Tests having a --gtest_also_run_disabled_tests flag with a "true" value
-TEST_F(ParseFlagsTest, AlsoRunDisabledTestsTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_also_run_disabled_tests=1",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::AlsoRunDisabledTests(true),
-                            false);
-}
-
-// Tests having a --gtest_also_run_disabled_tests flag with a "false" value
-TEST_F(ParseFlagsTest, AlsoRunDisabledTestsFalse) {
-  const char* argv[] = {"foo.exe", "--gtest_also_run_disabled_tests=0",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::AlsoRunDisabledTests(false),
-                            false);
-}
-
-// Tests parsing --gtest_shuffle.
-TEST_F(ParseFlagsTest, ShuffleWithoutValue) {
-  const char* argv[] = {"foo.exe", "--gtest_shuffle", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Shuffle(true), false);
-}
-
-// Tests parsing --gtest_shuffle=0.
-TEST_F(ParseFlagsTest, ShuffleFalse_0) {
-  const char* argv[] = {"foo.exe", "--gtest_shuffle=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Shuffle(false), false);
-}
-
-// Tests parsing a --gtest_shuffle flag that has a "true" definition.
-TEST_F(ParseFlagsTest, ShuffleTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_shuffle=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Shuffle(true), false);
-}
-
-// Tests parsing --gtest_stack_trace_depth=number.
-TEST_F(ParseFlagsTest, StackTraceDepth) {
-  const char* argv[] = {"foo.exe", "--gtest_stack_trace_depth=5", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::StackTraceDepth(5), false);
-}
-
-TEST_F(ParseFlagsTest, StreamResultTo) {
-  const char* argv[] = {"foo.exe", "--gtest_stream_result_to=localhost:1234",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(
-      argv, argv2, Flags::StreamResultTo("localhost:1234"), false);
-}
-
-// Tests parsing --gtest_throw_on_failure.
-TEST_F(ParseFlagsTest, ThrowOnFailureWithoutValue) {
-  const char* argv[] = {"foo.exe", "--gtest_throw_on_failure", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ThrowOnFailure(true), false);
-}
-
-// Tests parsing --gtest_throw_on_failure=0.
-TEST_F(ParseFlagsTest, ThrowOnFailureFalse_0) {
-  const char* argv[] = {"foo.exe", "--gtest_throw_on_failure=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ThrowOnFailure(false), false);
-}
-
-// Tests parsing a --gtest_throw_on_failure flag that has a "true"
-// definition.
-TEST_F(ParseFlagsTest, ThrowOnFailureTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_throw_on_failure=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ThrowOnFailure(true), false);
-}
-
-# if GTEST_OS_WINDOWS
-// Tests parsing wide strings.
-TEST_F(ParseFlagsTest, WideStrings) {
-  const wchar_t* argv[] = {
-    L"foo.exe",
-    L"--gtest_filter=Foo*",
-    L"--gtest_list_tests=1",
-    L"--gtest_break_on_failure",
-    L"--non_gtest_flag",
-    NULL
-  };
-
-  const wchar_t* argv2[] = {
-    L"foo.exe",
-    L"--non_gtest_flag",
-    NULL
-  };
-
-  Flags expected_flags;
-  expected_flags.break_on_failure = true;
-  expected_flags.filter = "Foo*";
-  expected_flags.list_tests = true;
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, expected_flags, false);
-}
-# endif  // GTEST_OS_WINDOWS
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-class FlagfileTest : public ParseFlagsTest {
- public:
-  virtual void SetUp() {
-    ParseFlagsTest::SetUp();
-
-    testdata_path_.Set(internal::FilePath(
-        testing::TempDir() + internal::GetCurrentExecutableName().string() +
-        "_flagfile_test"));
-    testing::internal::posix::RmDir(testdata_path_.c_str());
-    EXPECT_TRUE(testdata_path_.CreateFolder());
-  }
-
-  virtual void TearDown() {
-    testing::internal::posix::RmDir(testdata_path_.c_str());
-    ParseFlagsTest::TearDown();
-  }
-
-  internal::FilePath CreateFlagfile(const char* contents) {
-    internal::FilePath file_path(internal::FilePath::GenerateUniqueFileName(
-        testdata_path_, internal::FilePath("unique"), "txt"));
-    FILE* f = testing::internal::posix::FOpen(file_path.c_str(), "w");
-    fprintf(f, "%s", contents);
-    fclose(f);
-    return file_path;
-  }
-
- private:
-  internal::FilePath testdata_path_;
-};
-
-// Tests an empty flagfile.
-TEST_F(FlagfileTest, Empty) {
-  internal::FilePath flagfile_path(CreateFlagfile(""));
-  std::string flagfile_flag =
-      std::string("--" GTEST_FLAG_PREFIX_ "flagfile=") + flagfile_path.c_str();
-
-  const char* argv[] = {"foo.exe", flagfile_flag.c_str(), nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags(), false);
-}
-
-// Tests passing a non-empty --gtest_filter flag via --gtest_flagfile.
-TEST_F(FlagfileTest, FilterNonEmpty) {
-  internal::FilePath flagfile_path(CreateFlagfile(
-      "--"  GTEST_FLAG_PREFIX_  "filter=abc"));
-  std::string flagfile_flag =
-      std::string("--" GTEST_FLAG_PREFIX_ "flagfile=") + flagfile_path.c_str();
-
-  const char* argv[] = {"foo.exe", flagfile_flag.c_str(), nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter("abc"), false);
-}
-
-// Tests passing several flags via --gtest_flagfile.
-TEST_F(FlagfileTest, SeveralFlags) {
-  internal::FilePath flagfile_path(CreateFlagfile(
-      "--"  GTEST_FLAG_PREFIX_  "filter=abc\n"
-      "--"  GTEST_FLAG_PREFIX_  "break_on_failure\n"
-      "--"  GTEST_FLAG_PREFIX_  "list_tests"));
-  std::string flagfile_flag =
-      std::string("--" GTEST_FLAG_PREFIX_ "flagfile=") + flagfile_path.c_str();
-
-  const char* argv[] = {"foo.exe", flagfile_flag.c_str(), nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  Flags expected_flags;
-  expected_flags.break_on_failure = true;
-  expected_flags.filter = "abc";
-  expected_flags.list_tests = true;
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, expected_flags, false);
-}
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-// Tests current_test_info() in UnitTest.
-class CurrentTestInfoTest : public Test {
- protected:
-  // Tests that current_test_info() returns NULL before the first test in
-  // the test case is run.
-  static void SetUpTestSuite() {
-    // There should be no tests running at this point.
-    const TestInfo* test_info =
-      UnitTest::GetInstance()->current_test_info();
-    EXPECT_TRUE(test_info == nullptr)
-        << "There should be no tests running at this point.";
-  }
-
-  // Tests that current_test_info() returns NULL after the last test in
-  // the test case has run.
-  static void TearDownTestSuite() {
-    const TestInfo* test_info =
-      UnitTest::GetInstance()->current_test_info();
-    EXPECT_TRUE(test_info == nullptr)
-        << "There should be no tests running at this point.";
-  }
-};
-
-// Tests that current_test_info() returns TestInfo for currently running
-// test by checking the expected test name against the actual one.
-TEST_F(CurrentTestInfoTest, WorksForFirstTestInATestSuite) {
-  const TestInfo* test_info =
-    UnitTest::GetInstance()->current_test_info();
-  ASSERT_TRUE(nullptr != test_info)
-      << "There is a test running so we should have a valid TestInfo.";
-  EXPECT_STREQ("CurrentTestInfoTest", test_info->test_case_name())
-      << "Expected the name of the currently running test case.";
-  EXPECT_STREQ("WorksForFirstTestInATestSuite", test_info->name())
-      << "Expected the name of the currently running test.";
-}
-
-// Tests that current_test_info() returns TestInfo for currently running
-// test by checking the expected test name against the actual one.  We
-// use this test to see that the TestInfo object actually changed from
-// the previous invocation.
-TEST_F(CurrentTestInfoTest, WorksForSecondTestInATestSuite) {
-  const TestInfo* test_info =
-    UnitTest::GetInstance()->current_test_info();
-  ASSERT_TRUE(nullptr != test_info)
-      << "There is a test running so we should have a valid TestInfo.";
-  EXPECT_STREQ("CurrentTestInfoTest", test_info->test_case_name())
-      << "Expected the name of the currently running test case.";
-  EXPECT_STREQ("WorksForSecondTestInATestSuite", test_info->name())
-      << "Expected the name of the currently running test.";
-}
-
-}  // namespace testing
-
-
-// These two lines test that we can define tests in a namespace that
-// has the name "testing" and is nested in another namespace.
-namespace my_namespace {
-namespace testing {
-
-// Makes sure that TEST knows to use ::testing::Test instead of
-// ::my_namespace::testing::Test.
-class Test {};
-
-// Makes sure that an assertion knows to use ::testing::Message instead of
-// ::my_namespace::testing::Message.
-class Message {};
-
-// Makes sure that an assertion knows to use
-// ::testing::AssertionResult instead of
-// ::my_namespace::testing::AssertionResult.
-class AssertionResult {};
-
-// Tests that an assertion that should succeed works as expected.
-TEST(NestedTestingNamespaceTest, Success) {
-  EXPECT_EQ(1, 1) << "This shouldn't fail.";
-}
-
-// Tests that an assertion that should fail works as expected.
-TEST(NestedTestingNamespaceTest, Failure) {
-  EXPECT_FATAL_FAILURE(FAIL() << "This failure is expected.",
-                       "This failure is expected.");
-}
-
-}  // namespace testing
-}  // namespace my_namespace
-
-// Tests that one can call superclass SetUp and TearDown methods--
-// that is, that they are not private.
-// No tests are based on this fixture; the test "passes" if it compiles
-// successfully.
-class ProtectedFixtureMethodsTest : public Test {
- protected:
-  void SetUp() override { Test::SetUp(); }
-  void TearDown() override { Test::TearDown(); }
-};
-
-// StreamingAssertionsTest tests the streaming versions of a representative
-// sample of assertions.
-TEST(StreamingAssertionsTest, Unconditional) {
-  SUCCEED() << "expected success";
-  EXPECT_NONFATAL_FAILURE(ADD_FAILURE() << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(FAIL() << "expected failure",
-                       "expected failure");
-}
-
-#ifdef __BORLANDC__
-// Silences warnings: "Condition is always true", "Unreachable code"
-# pragma option push -w-ccc -w-rch
-#endif
-
-TEST(StreamingAssertionsTest, Truth) {
-  EXPECT_TRUE(true) << "unexpected failure";
-  ASSERT_TRUE(true) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(false) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(false) << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, Truth2) {
-  EXPECT_FALSE(false) << "unexpected failure";
-  ASSERT_FALSE(false) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(true) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_FALSE(true) << "expected failure",
-                       "expected failure");
-}
-
-#ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them
-# pragma option pop
-#endif
-
-TEST(StreamingAssertionsTest, IntegerEquals) {
-  EXPECT_EQ(1, 1) << "unexpected failure";
-  ASSERT_EQ(1, 1) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(1, 2) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(1, 2) << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, IntegerLessThan) {
-  EXPECT_LT(1, 2) << "unexpected failure";
-  ASSERT_LT(1, 2) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(2, 1) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_LT(2, 1) << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, StringsEqual) {
-  EXPECT_STREQ("foo", "foo") << "unexpected failure";
-  ASSERT_STREQ("foo", "foo") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STREQ("foo", "bar") << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_STREQ("foo", "bar") << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, StringsNotEqual) {
-  EXPECT_STRNE("foo", "bar") << "unexpected failure";
-  ASSERT_STRNE("foo", "bar") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE("foo", "foo") << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_STRNE("foo", "foo") << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, StringsEqualIgnoringCase) {
-  EXPECT_STRCASEEQ("foo", "FOO") << "unexpected failure";
-  ASSERT_STRCASEEQ("foo", "FOO") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRCASEEQ("foo", "bar") << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASEEQ("foo", "bar") << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, StringNotEqualIgnoringCase) {
-  EXPECT_STRCASENE("foo", "bar") << "unexpected failure";
-  ASSERT_STRCASENE("foo", "bar") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRCASENE("foo", "FOO") << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASENE("bar", "BAR") << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, FloatingPointEquals) {
-  EXPECT_FLOAT_EQ(1.0, 1.0) << "unexpected failure";
-  ASSERT_FLOAT_EQ(1.0, 1.0) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(0.0, 1.0) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_FLOAT_EQ(0.0, 1.0) << "expected failure",
-                       "expected failure");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-TEST(StreamingAssertionsTest, Throw) {
-  EXPECT_THROW(ThrowAnInteger(), int) << "unexpected failure";
-  ASSERT_THROW(ThrowAnInteger(), int) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(ThrowAnInteger(), bool) <<
-                          "expected failure", "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_THROW(ThrowAnInteger(), bool) <<
-                       "expected failure", "expected failure");
-}
-
-TEST(StreamingAssertionsTest, NoThrow) {
-  EXPECT_NO_THROW(ThrowNothing()) << "unexpected failure";
-  ASSERT_NO_THROW(ThrowNothing()) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW(ThrowAnInteger()) <<
-                          "expected failure", "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_NO_THROW(ThrowAnInteger()) <<
-                       "expected failure", "expected failure");
-}
-
-TEST(StreamingAssertionsTest, AnyThrow) {
-  EXPECT_ANY_THROW(ThrowAnInteger()) << "unexpected failure";
-  ASSERT_ANY_THROW(ThrowAnInteger()) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_ANY_THROW(ThrowNothing()) <<
-                          "expected failure", "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_ANY_THROW(ThrowNothing()) <<
-                       "expected failure", "expected failure");
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Tests that Google Test correctly decides whether to use colors in the output.
-
-TEST(ColoredOutputTest, UsesColorsWhenGTestColorFlagIsYes) {
-  GTEST_FLAG(color) = "yes";
-
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-
-  SetEnv("TERM", "dumb");  // TERM doesn't support colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-}
-
-TEST(ColoredOutputTest, UsesColorsWhenGTestColorFlagIsAliasOfYes) {
-  SetEnv("TERM", "dumb");  // TERM doesn't support colors.
-
-  GTEST_FLAG(color) = "True";
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-
-  GTEST_FLAG(color) = "t";
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-
-  GTEST_FLAG(color) = "1";
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-}
-
-TEST(ColoredOutputTest, UsesNoColorWhenGTestColorFlagIsNo) {
-  GTEST_FLAG(color) = "no";
-
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-  EXPECT_FALSE(ShouldUseColor(false));  // Stdout is not a TTY.
-
-  SetEnv("TERM", "dumb");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-  EXPECT_FALSE(ShouldUseColor(false));  // Stdout is not a TTY.
-}
-
-TEST(ColoredOutputTest, UsesNoColorWhenGTestColorFlagIsInvalid) {
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-
-  GTEST_FLAG(color) = "F";
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  GTEST_FLAG(color) = "0";
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  GTEST_FLAG(color) = "unknown";
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-}
-
-TEST(ColoredOutputTest, UsesColorsWhenStdoutIsTty) {
-  GTEST_FLAG(color) = "auto";
-
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-  EXPECT_FALSE(ShouldUseColor(false));  // Stdout is not a TTY.
-  EXPECT_TRUE(ShouldUseColor(true));    // Stdout is a TTY.
-}
-
-TEST(ColoredOutputTest, UsesColorsWhenTermSupportsColors) {
-  GTEST_FLAG(color) = "auto";
-
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
-  // On Windows, we ignore the TERM variable as it's usually not set.
-
-  SetEnv("TERM", "dumb");
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "");
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm");
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-#else
-  // On non-Windows platforms, we rely on TERM to determine if the
-  // terminal supports colors.
-
-  SetEnv("TERM", "dumb");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "emacs");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "vt100");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm-mono");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm-color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm-256color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "screen");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "screen-256color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "tmux");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "tmux-256color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "rxvt-unicode");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "rxvt-unicode-256color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "linux");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "cygwin");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-#endif  // GTEST_OS_WINDOWS
-}
-
-// Verifies that StaticAssertTypeEq works in a namespace scope.
-
-static bool dummy1 GTEST_ATTRIBUTE_UNUSED_ = StaticAssertTypeEq<bool, bool>();
-static bool dummy2 GTEST_ATTRIBUTE_UNUSED_ =
-    StaticAssertTypeEq<const int, const int>();
-
-// Verifies that StaticAssertTypeEq works in a class.
-
-template <typename T>
-class StaticAssertTypeEqTestHelper {
- public:
-  StaticAssertTypeEqTestHelper() { StaticAssertTypeEq<bool, T>(); }
-};
-
-TEST(StaticAssertTypeEqTest, WorksInClass) {
-  StaticAssertTypeEqTestHelper<bool>();
-}
-
-// Verifies that StaticAssertTypeEq works inside a function.
-
-typedef int IntAlias;
-
-TEST(StaticAssertTypeEqTest, CompilesForEqualTypes) {
-  StaticAssertTypeEq<int, IntAlias>();
-  StaticAssertTypeEq<int*, IntAlias*>();
-}
-
-TEST(HasNonfatalFailureTest, ReturnsFalseWhenThereIsNoFailure) {
-  EXPECT_FALSE(HasNonfatalFailure());
-}
-
-static void FailFatally() { FAIL(); }
-
-TEST(HasNonfatalFailureTest, ReturnsFalseWhenThereIsOnlyFatalFailure) {
-  FailFatally();
-  const bool has_nonfatal_failure = HasNonfatalFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_FALSE(has_nonfatal_failure);
-}
-
-TEST(HasNonfatalFailureTest, ReturnsTrueWhenThereIsNonfatalFailure) {
-  ADD_FAILURE();
-  const bool has_nonfatal_failure = HasNonfatalFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_nonfatal_failure);
-}
-
-TEST(HasNonfatalFailureTest, ReturnsTrueWhenThereAreFatalAndNonfatalFailures) {
-  FailFatally();
-  ADD_FAILURE();
-  const bool has_nonfatal_failure = HasNonfatalFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_nonfatal_failure);
-}
-
-// A wrapper for calling HasNonfatalFailure outside of a test body.
-static bool HasNonfatalFailureHelper() {
-  return testing::Test::HasNonfatalFailure();
-}
-
-TEST(HasNonfatalFailureTest, WorksOutsideOfTestBody) {
-  EXPECT_FALSE(HasNonfatalFailureHelper());
-}
-
-TEST(HasNonfatalFailureTest, WorksOutsideOfTestBody2) {
-  ADD_FAILURE();
-  const bool has_nonfatal_failure = HasNonfatalFailureHelper();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_nonfatal_failure);
-}
-
-TEST(HasFailureTest, ReturnsFalseWhenThereIsNoFailure) {
-  EXPECT_FALSE(HasFailure());
-}
-
-TEST(HasFailureTest, ReturnsTrueWhenThereIsFatalFailure) {
-  FailFatally();
-  const bool has_failure = HasFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_failure);
-}
-
-TEST(HasFailureTest, ReturnsTrueWhenThereIsNonfatalFailure) {
-  ADD_FAILURE();
-  const bool has_failure = HasFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_failure);
-}
-
-TEST(HasFailureTest, ReturnsTrueWhenThereAreFatalAndNonfatalFailures) {
-  FailFatally();
-  ADD_FAILURE();
-  const bool has_failure = HasFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_failure);
-}
-
-// A wrapper for calling HasFailure outside of a test body.
-static bool HasFailureHelper() { return testing::Test::HasFailure(); }
-
-TEST(HasFailureTest, WorksOutsideOfTestBody) {
-  EXPECT_FALSE(HasFailureHelper());
-}
-
-TEST(HasFailureTest, WorksOutsideOfTestBody2) {
-  ADD_FAILURE();
-  const bool has_failure = HasFailureHelper();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_failure);
-}
-
-class TestListener : public EmptyTestEventListener {
- public:
-  TestListener() : on_start_counter_(nullptr), is_destroyed_(nullptr) {}
-  TestListener(int* on_start_counter, bool* is_destroyed)
-      : on_start_counter_(on_start_counter),
-        is_destroyed_(is_destroyed) {}
-
-  ~TestListener() override {
-    if (is_destroyed_)
-      *is_destroyed_ = true;
-  }
-
- protected:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {
-    if (on_start_counter_ != nullptr) (*on_start_counter_)++;
-  }
-
- private:
-  int* on_start_counter_;
-  bool* is_destroyed_;
-};
-
-// Tests the constructor.
-TEST(TestEventListenersTest, ConstructionWorks) {
-  TestEventListeners listeners;
-
-  EXPECT_TRUE(TestEventListenersAccessor::GetRepeater(&listeners) != nullptr);
-  EXPECT_TRUE(listeners.default_result_printer() == nullptr);
-  EXPECT_TRUE(listeners.default_xml_generator() == nullptr);
-}
-
-// Tests that the TestEventListeners destructor deletes all the listeners it
-// owns.
-TEST(TestEventListenersTest, DestructionWorks) {
-  bool default_result_printer_is_destroyed = false;
-  bool default_xml_printer_is_destroyed = false;
-  bool extra_listener_is_destroyed = false;
-  TestListener* default_result_printer =
-      new TestListener(nullptr, &default_result_printer_is_destroyed);
-  TestListener* default_xml_printer =
-      new TestListener(nullptr, &default_xml_printer_is_destroyed);
-  TestListener* extra_listener =
-      new TestListener(nullptr, &extra_listener_is_destroyed);
-
-  {
-    TestEventListeners listeners;
-    TestEventListenersAccessor::SetDefaultResultPrinter(&listeners,
-                                                        default_result_printer);
-    TestEventListenersAccessor::SetDefaultXmlGenerator(&listeners,
-                                                       default_xml_printer);
-    listeners.Append(extra_listener);
-  }
-  EXPECT_TRUE(default_result_printer_is_destroyed);
-  EXPECT_TRUE(default_xml_printer_is_destroyed);
-  EXPECT_TRUE(extra_listener_is_destroyed);
-}
-
-// Tests that a listener Append'ed to a TestEventListeners list starts
-// receiving events.
-TEST(TestEventListenersTest, Append) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-  {
-    TestEventListeners listeners;
-    listeners.Append(listener);
-    TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-        *UnitTest::GetInstance());
-    EXPECT_EQ(1, on_start_counter);
-  }
-  EXPECT_TRUE(is_destroyed);
-}
-
-// Tests that listeners receive events in the order they were appended to
-// the list, except for *End requests, which must be received in the reverse
-// order.
-class SequenceTestingListener : public EmptyTestEventListener {
- public:
-  SequenceTestingListener(std::vector<std::string>* vector, const char* id)
-      : vector_(vector), id_(id) {}
-
- protected:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {
-    vector_->push_back(GetEventDescription("OnTestProgramStart"));
-  }
-
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {
-    vector_->push_back(GetEventDescription("OnTestProgramEnd"));
-  }
-
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int /*iteration*/) override {
-    vector_->push_back(GetEventDescription("OnTestIterationStart"));
-  }
-
-  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                          int /*iteration*/) override {
-    vector_->push_back(GetEventDescription("OnTestIterationEnd"));
-  }
-
- private:
-  std::string GetEventDescription(const char* method) {
-    Message message;
-    message << id_ << "." << method;
-    return message.GetString();
-  }
-
-  std::vector<std::string>* vector_;
-  const char* const id_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(SequenceTestingListener);
-};
-
-TEST(EventListenerTest, AppendKeepsOrder) {
-  std::vector<std::string> vec;
-  TestEventListeners listeners;
-  listeners.Append(new SequenceTestingListener(&vec, "1st"));
-  listeners.Append(new SequenceTestingListener(&vec, "2nd"));
-  listeners.Append(new SequenceTestingListener(&vec, "3rd"));
-
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-  ASSERT_EQ(3U, vec.size());
-  EXPECT_STREQ("1st.OnTestProgramStart", vec[0].c_str());
-  EXPECT_STREQ("2nd.OnTestProgramStart", vec[1].c_str());
-  EXPECT_STREQ("3rd.OnTestProgramStart", vec[2].c_str());
-
-  vec.clear();
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramEnd(
-      *UnitTest::GetInstance());
-  ASSERT_EQ(3U, vec.size());
-  EXPECT_STREQ("3rd.OnTestProgramEnd", vec[0].c_str());
-  EXPECT_STREQ("2nd.OnTestProgramEnd", vec[1].c_str());
-  EXPECT_STREQ("1st.OnTestProgramEnd", vec[2].c_str());
-
-  vec.clear();
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestIterationStart(
-      *UnitTest::GetInstance(), 0);
-  ASSERT_EQ(3U, vec.size());
-  EXPECT_STREQ("1st.OnTestIterationStart", vec[0].c_str());
-  EXPECT_STREQ("2nd.OnTestIterationStart", vec[1].c_str());
-  EXPECT_STREQ("3rd.OnTestIterationStart", vec[2].c_str());
-
-  vec.clear();
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestIterationEnd(
-      *UnitTest::GetInstance(), 0);
-  ASSERT_EQ(3U, vec.size());
-  EXPECT_STREQ("3rd.OnTestIterationEnd", vec[0].c_str());
-  EXPECT_STREQ("2nd.OnTestIterationEnd", vec[1].c_str());
-  EXPECT_STREQ("1st.OnTestIterationEnd", vec[2].c_str());
-}
-
-// Tests that a listener removed from a TestEventListeners list stops receiving
-// events and is not deleted when the list is destroyed.
-TEST(TestEventListenersTest, Release) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  // Although Append passes the ownership of this object to the list,
-  // the following calls release it, and we need to delete it before the
-  // test ends.
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-  {
-    TestEventListeners listeners;
-    listeners.Append(listener);
-    EXPECT_EQ(listener, listeners.Release(listener));
-    TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-        *UnitTest::GetInstance());
-    EXPECT_TRUE(listeners.Release(listener) == nullptr);
-  }
-  EXPECT_EQ(0, on_start_counter);
-  EXPECT_FALSE(is_destroyed);
-  delete listener;
-}
-
-// Tests that no events are forwarded when event forwarding is disabled.
-TEST(EventListenerTest, SuppressEventForwarding) {
-  int on_start_counter = 0;
-  TestListener* listener = new TestListener(&on_start_counter, nullptr);
-
-  TestEventListeners listeners;
-  listeners.Append(listener);
-  ASSERT_TRUE(TestEventListenersAccessor::EventForwardingEnabled(listeners));
-  TestEventListenersAccessor::SuppressEventForwarding(&listeners);
-  ASSERT_FALSE(TestEventListenersAccessor::EventForwardingEnabled(listeners));
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-  EXPECT_EQ(0, on_start_counter);
-}
-
-// Tests that events generated by Google Test are not forwarded in
-// death test subprocesses.
-TEST(EventListenerDeathTest, EventsNotForwardedInDeathTestSubprecesses) {
-  EXPECT_DEATH_IF_SUPPORTED({
-      GTEST_CHECK_(TestEventListenersAccessor::EventForwardingEnabled(
-          *GetUnitTestImpl()->listeners())) << "expected failure";},
-      "expected failure");
-}
-
-// Tests that a listener installed via SetDefaultResultPrinter() starts
-// receiving events and is returned via default_result_printer() and that
-// the previous default_result_printer is removed from the list and deleted.
-TEST(EventListenerTest, default_result_printer) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-
-  TestEventListeners listeners;
-  TestEventListenersAccessor::SetDefaultResultPrinter(&listeners, listener);
-
-  EXPECT_EQ(listener, listeners.default_result_printer());
-
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-
-  EXPECT_EQ(1, on_start_counter);
-
-  // Replacing default_result_printer with something else should remove it
-  // from the list and destroy it.
-  TestEventListenersAccessor::SetDefaultResultPrinter(&listeners, nullptr);
-
-  EXPECT_TRUE(listeners.default_result_printer() == nullptr);
-  EXPECT_TRUE(is_destroyed);
-
-  // After broadcasting an event the counter is still the same, indicating
-  // the listener is not in the list anymore.
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-  EXPECT_EQ(1, on_start_counter);
-}
-
-// Tests that the default_result_printer listener stops receiving events
-// when removed via Release and that is not owned by the list anymore.
-TEST(EventListenerTest, RemovingDefaultResultPrinterWorks) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  // Although Append passes the ownership of this object to the list,
-  // the following calls release it, and we need to delete it before the
-  // test ends.
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-  {
-    TestEventListeners listeners;
-    TestEventListenersAccessor::SetDefaultResultPrinter(&listeners, listener);
-
-    EXPECT_EQ(listener, listeners.Release(listener));
-    EXPECT_TRUE(listeners.default_result_printer() == nullptr);
-    EXPECT_FALSE(is_destroyed);
-
-    // Broadcasting events now should not affect default_result_printer.
-    TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-        *UnitTest::GetInstance());
-    EXPECT_EQ(0, on_start_counter);
-  }
-  // Destroying the list should not affect the listener now, too.
-  EXPECT_FALSE(is_destroyed);
-  delete listener;
-}
-
-// Tests that a listener installed via SetDefaultXmlGenerator() starts
-// receiving events and is returned via default_xml_generator() and that
-// the previous default_xml_generator is removed from the list and deleted.
-TEST(EventListenerTest, default_xml_generator) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-
-  TestEventListeners listeners;
-  TestEventListenersAccessor::SetDefaultXmlGenerator(&listeners, listener);
-
-  EXPECT_EQ(listener, listeners.default_xml_generator());
-
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-
-  EXPECT_EQ(1, on_start_counter);
-
-  // Replacing default_xml_generator with something else should remove it
-  // from the list and destroy it.
-  TestEventListenersAccessor::SetDefaultXmlGenerator(&listeners, nullptr);
-
-  EXPECT_TRUE(listeners.default_xml_generator() == nullptr);
-  EXPECT_TRUE(is_destroyed);
-
-  // After broadcasting an event the counter is still the same, indicating
-  // the listener is not in the list anymore.
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-  EXPECT_EQ(1, on_start_counter);
-}
-
-// Tests that the default_xml_generator listener stops receiving events
-// when removed via Release and that is not owned by the list anymore.
-TEST(EventListenerTest, RemovingDefaultXmlGeneratorWorks) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  // Although Append passes the ownership of this object to the list,
-  // the following calls release it, and we need to delete it before the
-  // test ends.
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-  {
-    TestEventListeners listeners;
-    TestEventListenersAccessor::SetDefaultXmlGenerator(&listeners, listener);
-
-    EXPECT_EQ(listener, listeners.Release(listener));
-    EXPECT_TRUE(listeners.default_xml_generator() == nullptr);
-    EXPECT_FALSE(is_destroyed);
-
-    // Broadcasting events now should not affect default_xml_generator.
-    TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-        *UnitTest::GetInstance());
-    EXPECT_EQ(0, on_start_counter);
-  }
-  // Destroying the list should not affect the listener now, too.
-  EXPECT_FALSE(is_destroyed);
-  delete listener;
-}
-
-// Sanity tests to ensure that the alternative, verbose spellings of
-// some of the macros work.  We don't test them thoroughly as that
-// would be quite involved.  Since their implementations are
-// straightforward, and they are rarely used, we'll just rely on the
-// users to tell us when they are broken.
-GTEST_TEST(AlternativeNameTest, Works) {  // GTEST_TEST is the same as TEST.
-  GTEST_SUCCEED() << "OK";  // GTEST_SUCCEED is the same as SUCCEED.
-
-  // GTEST_FAIL is the same as FAIL.
-  EXPECT_FATAL_FAILURE(GTEST_FAIL() << "An expected failure",
-                       "An expected failure");
-
-  // GTEST_ASSERT_XY is the same as ASSERT_XY.
-
-  GTEST_ASSERT_EQ(0, 0);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_EQ(0, 1) << "An expected failure",
-                       "An expected failure");
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_EQ(1, 0) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_NE(0, 1);
-  GTEST_ASSERT_NE(1, 0);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_NE(0, 0) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_LE(0, 0);
-  GTEST_ASSERT_LE(0, 1);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_LE(1, 0) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_LT(0, 1);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_LT(0, 0) << "An expected failure",
-                       "An expected failure");
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_LT(1, 0) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_GE(0, 0);
-  GTEST_ASSERT_GE(1, 0);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_GE(0, 1) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_GT(1, 0);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_GT(0, 1) << "An expected failure",
-                       "An expected failure");
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_GT(1, 1) << "An expected failure",
-                       "An expected failure");
-}
-
-// Tests for internal utilities necessary for implementation of the universal
-// printing.
-
-class ConversionHelperBase {};
-class ConversionHelperDerived : public ConversionHelperBase {};
-
-// Tests that IsAProtocolMessage<T>::value is a compile-time constant.
-TEST(IsAProtocolMessageTest, ValueIsCompileTimeConstant) {
-  GTEST_COMPILE_ASSERT_(IsAProtocolMessage<::proto2::Message>::value,
-                        const_true);
-  GTEST_COMPILE_ASSERT_(!IsAProtocolMessage<int>::value, const_false);
-}
-
-// Tests that IsAProtocolMessage<T>::value is true when T is
-// proto2::Message or a sub-class of it.
-TEST(IsAProtocolMessageTest, ValueIsTrueWhenTypeIsAProtocolMessage) {
-  EXPECT_TRUE(IsAProtocolMessage< ::proto2::Message>::value);
-}
-
-// Tests that IsAProtocolMessage<T>::value is false when T is neither
-// ::proto2::Message nor a sub-class of it.
-TEST(IsAProtocolMessageTest, ValueIsFalseWhenTypeIsNotAProtocolMessage) {
-  EXPECT_FALSE(IsAProtocolMessage<int>::value);
-  EXPECT_FALSE(IsAProtocolMessage<const ConversionHelperBase>::value);
-}
-
-// Tests GTEST_REMOVE_REFERENCE_AND_CONST_.
-
-template <typename T1, typename T2>
-void TestGTestRemoveReferenceAndConst() {
-  static_assert(std::is_same<T1, GTEST_REMOVE_REFERENCE_AND_CONST_(T2)>::value,
-                "GTEST_REMOVE_REFERENCE_AND_CONST_ failed.");
-}
-
-TEST(RemoveReferenceToConstTest, Works) {
-  TestGTestRemoveReferenceAndConst<int, int>();
-  TestGTestRemoveReferenceAndConst<double, double&>();
-  TestGTestRemoveReferenceAndConst<char, const char>();
-  TestGTestRemoveReferenceAndConst<char, const char&>();
-  TestGTestRemoveReferenceAndConst<const char*, const char*>();
-}
-
-// Tests GTEST_REFERENCE_TO_CONST_.
-
-template <typename T1, typename T2>
-void TestGTestReferenceToConst() {
-  static_assert(std::is_same<T1, GTEST_REFERENCE_TO_CONST_(T2)>::value,
-                "GTEST_REFERENCE_TO_CONST_ failed.");
-}
-
-TEST(GTestReferenceToConstTest, Works) {
-  TestGTestReferenceToConst<const char&, char>();
-  TestGTestReferenceToConst<const int&, const int>();
-  TestGTestReferenceToConst<const double&, double>();
-  TestGTestReferenceToConst<const std::string&, const std::string&>();
-}
-
-
-// Tests IsContainerTest.
-
-class NonContainer {};
-
-TEST(IsContainerTestTest, WorksForNonContainer) {
-  EXPECT_EQ(sizeof(IsNotContainer), sizeof(IsContainerTest<int>(0)));
-  EXPECT_EQ(sizeof(IsNotContainer), sizeof(IsContainerTest<char[5]>(0)));
-  EXPECT_EQ(sizeof(IsNotContainer), sizeof(IsContainerTest<NonContainer>(0)));
-}
-
-TEST(IsContainerTestTest, WorksForContainer) {
-  EXPECT_EQ(sizeof(IsContainer),
-            sizeof(IsContainerTest<std::vector<bool> >(0)));
-  EXPECT_EQ(sizeof(IsContainer),
-            sizeof(IsContainerTest<std::map<int, double> >(0)));
-}
-
-struct ConstOnlyContainerWithPointerIterator {
-  using const_iterator = int*;
-  const_iterator begin() const;
-  const_iterator end() const;
-};
-
-struct ConstOnlyContainerWithClassIterator {
-  struct const_iterator {
-    const int& operator*() const;
-    const_iterator& operator++(/* pre-increment */);
-  };
-  const_iterator begin() const;
-  const_iterator end() const;
-};
-
-TEST(IsContainerTestTest, ConstOnlyContainer) {
-  EXPECT_EQ(sizeof(IsContainer),
-            sizeof(IsContainerTest<ConstOnlyContainerWithPointerIterator>(0)));
-  EXPECT_EQ(sizeof(IsContainer),
-            sizeof(IsContainerTest<ConstOnlyContainerWithClassIterator>(0)));
-}
-
-// Tests IsHashTable.
-struct AHashTable {
-  typedef void hasher;
-};
-struct NotReallyAHashTable {
-  typedef void hasher;
-  typedef void reverse_iterator;
-};
-TEST(IsHashTable, Basic) {
-  EXPECT_TRUE(testing::internal::IsHashTable<AHashTable>::value);
-  EXPECT_FALSE(testing::internal::IsHashTable<NotReallyAHashTable>::value);
-  EXPECT_FALSE(testing::internal::IsHashTable<std::vector<int>>::value);
-  EXPECT_TRUE(testing::internal::IsHashTable<std::unordered_set<int>>::value);
-}
-
-// Tests ArrayEq().
-
-TEST(ArrayEqTest, WorksForDegeneratedArrays) {
-  EXPECT_TRUE(ArrayEq(5, 5L));
-  EXPECT_FALSE(ArrayEq('a', 0));
-}
-
-TEST(ArrayEqTest, WorksForOneDimensionalArrays) {
-  // Note that a and b are distinct but compatible types.
-  const int a[] = { 0, 1 };
-  long b[] = { 0, 1 };
-  EXPECT_TRUE(ArrayEq(a, b));
-  EXPECT_TRUE(ArrayEq(a, 2, b));
-
-  b[0] = 2;
-  EXPECT_FALSE(ArrayEq(a, b));
-  EXPECT_FALSE(ArrayEq(a, 1, b));
-}
-
-TEST(ArrayEqTest, WorksForTwoDimensionalArrays) {
-  const char a[][3] = { "hi", "lo" };
-  const char b[][3] = { "hi", "lo" };
-  const char c[][3] = { "hi", "li" };
-
-  EXPECT_TRUE(ArrayEq(a, b));
-  EXPECT_TRUE(ArrayEq(a, 2, b));
-
-  EXPECT_FALSE(ArrayEq(a, c));
-  EXPECT_FALSE(ArrayEq(a, 2, c));
-}
-
-// Tests ArrayAwareFind().
-
-TEST(ArrayAwareFindTest, WorksForOneDimensionalArray) {
-  const char a[] = "hello";
-  EXPECT_EQ(a + 4, ArrayAwareFind(a, a + 5, 'o'));
-  EXPECT_EQ(a + 5, ArrayAwareFind(a, a + 5, 'x'));
-}
-
-TEST(ArrayAwareFindTest, WorksForTwoDimensionalArray) {
-  int a[][2] = { { 0, 1 }, { 2, 3 }, { 4, 5 } };
-  const int b[2] = { 2, 3 };
-  EXPECT_EQ(a + 1, ArrayAwareFind(a, a + 3, b));
-
-  const int c[2] = { 6, 7 };
-  EXPECT_EQ(a + 3, ArrayAwareFind(a, a + 3, c));
-}
-
-// Tests CopyArray().
-
-TEST(CopyArrayTest, WorksForDegeneratedArrays) {
-  int n = 0;
-  CopyArray('a', &n);
-  EXPECT_EQ('a', n);
-}
-
-TEST(CopyArrayTest, WorksForOneDimensionalArrays) {
-  const char a[3] = "hi";
-  int b[3];
-#ifndef __BORLANDC__  // C++Builder cannot compile some array size deductions.
-  CopyArray(a, &b);
-  EXPECT_TRUE(ArrayEq(a, b));
-#endif
-
-  int c[3];
-  CopyArray(a, 3, c);
-  EXPECT_TRUE(ArrayEq(a, c));
-}
-
-TEST(CopyArrayTest, WorksForTwoDimensionalArrays) {
-  const int a[2][3] = { { 0, 1, 2 }, { 3, 4, 5 } };
-  int b[2][3];
-#ifndef __BORLANDC__  // C++Builder cannot compile some array size deductions.
-  CopyArray(a, &b);
-  EXPECT_TRUE(ArrayEq(a, b));
-#endif
-
-  int c[2][3];
-  CopyArray(a, 2, c);
-  EXPECT_TRUE(ArrayEq(a, c));
-}
-
-// Tests NativeArray.
-
-TEST(NativeArrayTest, ConstructorFromArrayWorks) {
-  const int a[3] = { 0, 1, 2 };
-  NativeArray<int> na(a, 3, RelationToSourceReference());
-  EXPECT_EQ(3U, na.size());
-  EXPECT_EQ(a, na.begin());
-}
-
-TEST(NativeArrayTest, CreatesAndDeletesCopyOfArrayWhenAskedTo) {
-  typedef int Array[2];
-  Array* a = new Array[1];
-  (*a)[0] = 0;
-  (*a)[1] = 1;
-  NativeArray<int> na(*a, 2, RelationToSourceCopy());
-  EXPECT_NE(*a, na.begin());
-  delete[] a;
-  EXPECT_EQ(0, na.begin()[0]);
-  EXPECT_EQ(1, na.begin()[1]);
-
-  // We rely on the heap checker to verify that na deletes the copy of
-  // array.
-}
-
-TEST(NativeArrayTest, TypeMembersAreCorrect) {
-  StaticAssertTypeEq<char, NativeArray<char>::value_type>();
-  StaticAssertTypeEq<int[2], NativeArray<int[2]>::value_type>();
-
-  StaticAssertTypeEq<const char*, NativeArray<char>::const_iterator>();
-  StaticAssertTypeEq<const bool(*)[2], NativeArray<bool[2]>::const_iterator>();
-}
-
-TEST(NativeArrayTest, MethodsWork) {
-  const int a[3] = { 0, 1, 2 };
-  NativeArray<int> na(a, 3, RelationToSourceCopy());
-  ASSERT_EQ(3U, na.size());
-  EXPECT_EQ(3, na.end() - na.begin());
-
-  NativeArray<int>::const_iterator it = na.begin();
-  EXPECT_EQ(0, *it);
-  ++it;
-  EXPECT_EQ(1, *it);
-  it++;
-  EXPECT_EQ(2, *it);
-  ++it;
-  EXPECT_EQ(na.end(), it);
-
-  EXPECT_TRUE(na == na);
-
-  NativeArray<int> na2(a, 3, RelationToSourceReference());
-  EXPECT_TRUE(na == na2);
-
-  const int b1[3] = { 0, 1, 1 };
-  const int b2[4] = { 0, 1, 2, 3 };
-  EXPECT_FALSE(na == NativeArray<int>(b1, 3, RelationToSourceReference()));
-  EXPECT_FALSE(na == NativeArray<int>(b2, 4, RelationToSourceCopy()));
-}
-
-TEST(NativeArrayTest, WorksForTwoDimensionalArray) {
-  const char a[2][3] = { "hi", "lo" };
-  NativeArray<char[3]> na(a, 2, RelationToSourceReference());
-  ASSERT_EQ(2U, na.size());
-  EXPECT_EQ(a, na.begin());
-}
-
-// IndexSequence
-TEST(IndexSequence, MakeIndexSequence) {
-  using testing::internal::IndexSequence;
-  using testing::internal::MakeIndexSequence;
-  EXPECT_TRUE(
-      (std::is_same<IndexSequence<>, MakeIndexSequence<0>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<IndexSequence<0>, MakeIndexSequence<1>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<IndexSequence<0, 1>, MakeIndexSequence<2>::type>::value));
-  EXPECT_TRUE((
-      std::is_same<IndexSequence<0, 1, 2>, MakeIndexSequence<3>::type>::value));
-  EXPECT_TRUE(
-      (std::is_base_of<IndexSequence<0, 1, 2>, MakeIndexSequence<3>>::value));
-}
-
-// ElemFromList
-TEST(ElemFromList, Basic) {
-  using testing::internal::ElemFromList;
-  using Idx = testing::internal::MakeIndexSequence<3>::type;
-  EXPECT_TRUE((
-      std::is_same<int, ElemFromList<0, Idx, int, double, char>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<double,
-                    ElemFromList<1, Idx, int, double, char>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<char,
-                    ElemFromList<2, Idx, int, double, char>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<
-          char, ElemFromList<7, testing::internal::MakeIndexSequence<12>::type,
-                             int, int, int, int, int, int, int, char, int, int,
-                             int, int>::type>::value));
-}
-
-// FlatTuple
-TEST(FlatTuple, Basic) {
-  using testing::internal::FlatTuple;
-
-  FlatTuple<int, double, const char*> tuple = {};
-  EXPECT_EQ(0, tuple.Get<0>());
-  EXPECT_EQ(0.0, tuple.Get<1>());
-  EXPECT_EQ(nullptr, tuple.Get<2>());
-
-  tuple = FlatTuple<int, double, const char*>(7, 3.2, "Foo");
-  EXPECT_EQ(7, tuple.Get<0>());
-  EXPECT_EQ(3.2, tuple.Get<1>());
-  EXPECT_EQ(std::string("Foo"), tuple.Get<2>());
-
-  tuple.Get<1>() = 5.1;
-  EXPECT_EQ(5.1, tuple.Get<1>());
-}
-
-TEST(FlatTuple, ManyTypes) {
-  using testing::internal::FlatTuple;
-
-  // Instantiate FlatTuple with 257 ints.
-  // Tests show that we can do it with thousands of elements, but very long
-  // compile times makes it unusuitable for this test.
-#define GTEST_FLAT_TUPLE_INT8 int, int, int, int, int, int, int, int,
-#define GTEST_FLAT_TUPLE_INT16 GTEST_FLAT_TUPLE_INT8 GTEST_FLAT_TUPLE_INT8
-#define GTEST_FLAT_TUPLE_INT32 GTEST_FLAT_TUPLE_INT16 GTEST_FLAT_TUPLE_INT16
-#define GTEST_FLAT_TUPLE_INT64 GTEST_FLAT_TUPLE_INT32 GTEST_FLAT_TUPLE_INT32
-#define GTEST_FLAT_TUPLE_INT128 GTEST_FLAT_TUPLE_INT64 GTEST_FLAT_TUPLE_INT64
-#define GTEST_FLAT_TUPLE_INT256 GTEST_FLAT_TUPLE_INT128 GTEST_FLAT_TUPLE_INT128
-
-  // Let's make sure that we can have a very long list of types without blowing
-  // up the template instantiation depth.
-  FlatTuple<GTEST_FLAT_TUPLE_INT256 int> tuple;
-
-  tuple.Get<0>() = 7;
-  tuple.Get<99>() = 17;
-  tuple.Get<256>() = 1000;
-  EXPECT_EQ(7, tuple.Get<0>());
-  EXPECT_EQ(17, tuple.Get<99>());
-  EXPECT_EQ(1000, tuple.Get<256>());
-}
-
-// Tests SkipPrefix().
-
-TEST(SkipPrefixTest, SkipsWhenPrefixMatches) {
-  const char* const str = "hello";
-
-  const char* p = str;
-  EXPECT_TRUE(SkipPrefix("", &p));
-  EXPECT_EQ(str, p);
-
-  p = str;
-  EXPECT_TRUE(SkipPrefix("hell", &p));
-  EXPECT_EQ(str + 4, p);
-}
-
-TEST(SkipPrefixTest, DoesNotSkipWhenPrefixDoesNotMatch) {
-  const char* const str = "world";
-
-  const char* p = str;
-  EXPECT_FALSE(SkipPrefix("W", &p));
-  EXPECT_EQ(str, p);
-
-  p = str;
-  EXPECT_FALSE(SkipPrefix("world!", &p));
-  EXPECT_EQ(str, p);
-}
-
-// Tests ad_hoc_test_result().
-
-class AdHocTestResultTest : public testing::Test {
- protected:
-  static void SetUpTestSuite() {
-    FAIL() << "A failure happened inside SetUpTestSuite().";
-  }
-};
-
-TEST_F(AdHocTestResultTest, AdHocTestResultForTestSuiteShowsFailure) {
-  const testing::TestResult& test_result = testing::UnitTest::GetInstance()
-                                               ->current_test_suite()
-                                               ->ad_hoc_test_result();
-  EXPECT_TRUE(test_result.Failed());
-}
-
-TEST_F(AdHocTestResultTest, AdHocTestResultTestForUnitTestDoesNotShowFailure) {
-  const testing::TestResult& test_result =
-      testing::UnitTest::GetInstance()->ad_hoc_test_result();
-  EXPECT_FALSE(test_result.Failed());
-}
-
-class DynamicUnitTestFixture : public testing::Test {};
-
-class DynamicTest : public DynamicUnitTestFixture {
-  void TestBody() override { EXPECT_TRUE(true); }
-};
-
-auto* dynamic_test = testing::RegisterTest(
-    "DynamicUnitTestFixture", "DynamicTest", "TYPE", "VALUE", __FILE__,
-    __LINE__, []() -> DynamicUnitTestFixture* { return new DynamicTest; });
-
-TEST(RegisterTest, WasRegistered) {
-  auto* unittest = testing::UnitTest::GetInstance();
-  for (int i = 0; i < unittest->total_test_suite_count(); ++i) {
-    auto* tests = unittest->GetTestSuite(i);
-    if (tests->name() != std::string("DynamicUnitTestFixture")) continue;
-    for (int j = 0; j < tests->total_test_count(); ++j) {
-      if (tests->GetTestInfo(j)->name() != std::string("DynamicTest")) continue;
-      // Found it.
-      EXPECT_STREQ(tests->GetTestInfo(j)->value_param(), "VALUE");
-      EXPECT_STREQ(tests->GetTestInfo(j)->type_param(), "TYPE");
-      return;
-    }
-  }
-
-  FAIL() << "Didn't find the test!";
-}
diff --git a/3rdparty/gtest/test/gtest_xml_outfile1_test_.cc b/3rdparty/gtest/test/gtest_xml_outfile1_test_.cc
deleted file mode 100644
index 19aa252a..00000000
--- a/3rdparty/gtest/test/gtest_xml_outfile1_test_.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// gtest_xml_outfile1_test_ writes some xml via TestProperty used by
-// gtest_xml_outfiles_test.py
-
-#include "gtest/gtest.h"
-
-class PropertyOne : public testing::Test {
- protected:
-  void SetUp() override { RecordProperty("SetUpProp", 1); }
-  void TearDown() override { RecordProperty("TearDownProp", 1); }
-};
-
-TEST_F(PropertyOne, TestSomeProperties) {
-  RecordProperty("TestSomeProperty", 1);
-}
diff --git a/3rdparty/gtest/test/gtest_xml_outfile2_test_.cc b/3rdparty/gtest/test/gtest_xml_outfile2_test_.cc
deleted file mode 100644
index f9a2a6e9..00000000
--- a/3rdparty/gtest/test/gtest_xml_outfile2_test_.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// gtest_xml_outfile2_test_ writes some xml via TestProperty used by
-// gtest_xml_outfiles_test.py
-
-#include "gtest/gtest.h"
-
-class PropertyTwo : public testing::Test {
- protected:
-  void SetUp() override { RecordProperty("SetUpProp", 2); }
-  void TearDown() override { RecordProperty("TearDownProp", 2); }
-};
-
-TEST_F(PropertyTwo, TestSomeProperties) {
-  RecordProperty("TestSomeProperty", 2);
-}
diff --git a/3rdparty/gtest/test/gtest_xml_outfiles_test.py b/3rdparty/gtest/test/gtest_xml_outfiles_test.py
deleted file mode 100644
index e093f6f0..00000000
--- a/3rdparty/gtest/test/gtest_xml_outfiles_test.py
+++ /dev/null
@@ -1,135 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for the gtest_xml_output module."""
-
-import os
-from xml.dom import minidom, Node
-import gtest_test_utils
-import gtest_xml_test_utils
-
-GTEST_OUTPUT_SUBDIR = "xml_outfiles"
-GTEST_OUTPUT_1_TEST = "gtest_xml_outfile1_test_"
-GTEST_OUTPUT_2_TEST = "gtest_xml_outfile2_test_"
-
-EXPECTED_XML_1 = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*" name="AllTests">
-  <testsuite name="PropertyOne" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="TestSomeProperties" status="run" result="completed" time="*" timestamp="*" classname="PropertyOne">
-      <properties>
-        <property name="SetUpProp" value="1"/>
-        <property name="TestSomeProperty" value="1"/>
-        <property name="TearDownProp" value="1"/>
-      </properties>
-    </testcase>
-  </testsuite>
-</testsuites>
-"""
-
-EXPECTED_XML_2 = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*" name="AllTests">
-  <testsuite name="PropertyTwo" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="TestSomeProperties" status="run" result="completed" time="*" timestamp="*" classname="PropertyTwo">
-      <properties>
-        <property name="SetUpProp" value="2"/>
-        <property name="TestSomeProperty" value="2"/>
-        <property name="TearDownProp" value="2"/>
-      </properties>
-    </testcase>
-  </testsuite>
-</testsuites>
-"""
-
-
-class GTestXMLOutFilesTest(gtest_xml_test_utils.GTestXMLTestCase):
-  """Unit test for Google Test's XML output functionality."""
-
-  def setUp(self):
-    # We want the trailing '/' that the last "" provides in os.path.join, for
-    # telling Google Test to create an output directory instead of a single file
-    # for xml output.
-    self.output_dir_ = os.path.join(gtest_test_utils.GetTempDir(),
-                                    GTEST_OUTPUT_SUBDIR, "")
-    self.DeleteFilesAndDir()
-
-  def tearDown(self):
-    self.DeleteFilesAndDir()
-
-  def DeleteFilesAndDir(self):
-    try:
-      os.remove(os.path.join(self.output_dir_, GTEST_OUTPUT_1_TEST + ".xml"))
-    except os.error:
-      pass
-    try:
-      os.remove(os.path.join(self.output_dir_, GTEST_OUTPUT_2_TEST + ".xml"))
-    except os.error:
-      pass
-    try:
-      os.rmdir(self.output_dir_)
-    except os.error:
-      pass
-
-  def testOutfile1(self):
-    self._TestOutFile(GTEST_OUTPUT_1_TEST, EXPECTED_XML_1)
-
-  def testOutfile2(self):
-    self._TestOutFile(GTEST_OUTPUT_2_TEST, EXPECTED_XML_2)
-
-  def _TestOutFile(self, test_name, expected_xml):
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(test_name)
-    command = [gtest_prog_path, "--gtest_output=xml:%s" % self.output_dir_]
-    p = gtest_test_utils.Subprocess(command,
-                                    working_dir=gtest_test_utils.GetTempDir())
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-
-    output_file_name1 = test_name + ".xml"
-    output_file1 = os.path.join(self.output_dir_, output_file_name1)
-    output_file_name2 = 'lt-' + output_file_name1
-    output_file2 = os.path.join(self.output_dir_, output_file_name2)
-    self.assert_(os.path.isfile(output_file1) or os.path.isfile(output_file2),
-                 output_file1)
-
-    expected = minidom.parseString(expected_xml)
-    if os.path.isfile(output_file1):
-      actual = minidom.parse(output_file1)
-    else:
-      actual = minidom.parse(output_file2)
-    self.NormalizeXml(actual.documentElement)
-    self.AssertEquivalentNodes(expected.documentElement,
-                               actual.documentElement)
-    expected.unlink()
-    actual.unlink()
-
-
-if __name__ == "__main__":
-  os.environ["GTEST_STACK_TRACE_DEPTH"] = "0"
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/gtest_xml_output_unittest.py b/3rdparty/gtest/test/gtest_xml_output_unittest.py
deleted file mode 100644
index 63b1af0b..00000000
--- a/3rdparty/gtest/test/gtest_xml_output_unittest.py
+++ /dev/null
@@ -1,389 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for the gtest_xml_output module"""
-
-import datetime
-import errno
-import os
-import re
-import sys
-from xml.dom import minidom, Node
-
-import gtest_test_utils
-import gtest_xml_test_utils
-
-GTEST_FILTER_FLAG = '--gtest_filter'
-GTEST_LIST_TESTS_FLAG = '--gtest_list_tests'
-GTEST_OUTPUT_FLAG = '--gtest_output'
-GTEST_DEFAULT_OUTPUT_FILE = 'test_detail.xml'
-GTEST_PROGRAM_NAME = 'gtest_xml_output_unittest_'
-
-# The flag indicating stacktraces are not supported
-NO_STACKTRACE_SUPPORT_FLAG = '--no_stacktrace_support'
-
-# The environment variables for test sharding.
-TOTAL_SHARDS_ENV_VAR = 'GTEST_TOTAL_SHARDS'
-SHARD_INDEX_ENV_VAR = 'GTEST_SHARD_INDEX'
-SHARD_STATUS_FILE_ENV_VAR = 'GTEST_SHARD_STATUS_FILE'
-
-SUPPORTS_STACK_TRACES = NO_STACKTRACE_SUPPORT_FLAG not in sys.argv
-
-if SUPPORTS_STACK_TRACES:
-  STACK_TRACE_TEMPLATE = '\nStack trace:\n*'
-else:
-  STACK_TRACE_TEMPLATE = ''
-  # unittest.main() can't handle unknown flags
-  sys.argv.remove(NO_STACKTRACE_SUPPORT_FLAG)
-
-EXPECTED_NON_EMPTY_XML = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="24" failures="4" disabled="2" errors="0" time="*" timestamp="*" name="AllTests" ad_hoc_property="42">
-  <testsuite name="SuccessfulTest" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="Succeeds" status="run" result="completed" time="*" timestamp="*" classname="SuccessfulTest"/>
-  </testsuite>
-  <testsuite name="FailedTest" tests="1" failures="1" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="Fails" status="run" result="completed" time="*" timestamp="*" classname="FailedTest">
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Expected equality of these values:&#x0A;  1&#x0A;  2" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Expected equality of these values:
-  1
-  2%(stack)s]]></failure>
-    </testcase>
-  </testsuite>
-  <testsuite name="MixedResultTest" tests="3" failures="1" disabled="1" errors="0" time="*" timestamp="*">
-    <testcase name="Succeeds" status="run" result="completed" time="*" timestamp="*" classname="MixedResultTest"/>
-    <testcase name="Fails" status="run" result="completed" time="*" timestamp="*" classname="MixedResultTest">
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Expected equality of these values:&#x0A;  1&#x0A;  2" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Expected equality of these values:
-  1
-  2%(stack)s]]></failure>
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Expected equality of these values:&#x0A;  2&#x0A;  3" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Expected equality of these values:
-  2
-  3%(stack)s]]></failure>
-    </testcase>
-    <testcase name="DISABLED_test" status="notrun" result="suppressed" time="*" timestamp="*" classname="MixedResultTest"/>
-  </testsuite>
-  <testsuite name="XmlQuotingTest" tests="1" failures="1" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="OutputsCData" status="run" result="completed" time="*" timestamp="*" classname="XmlQuotingTest">
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Failed&#x0A;XML output: &lt;?xml encoding=&quot;utf-8&quot;&gt;&lt;top&gt;&lt;![CDATA[cdata text]]&gt;&lt;/top&gt;" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Failed
-XML output: <?xml encoding="utf-8"><top><![CDATA[cdata text]]>]]&gt;<![CDATA[</top>%(stack)s]]></failure>
-    </testcase>
-  </testsuite>
-  <testsuite name="InvalidCharactersTest" tests="1" failures="1" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="InvalidCharactersInMessage" status="run" result="completed" time="*" timestamp="*" classname="InvalidCharactersTest">
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Failed&#x0A;Invalid characters in brackets []" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Failed
-Invalid characters in brackets []%(stack)s]]></failure>
-    </testcase>
-  </testsuite>
-  <testsuite name="DisabledTest" tests="1" failures="0" disabled="1" errors="0" time="*" timestamp="*">
-    <testcase name="DISABLED_test_not_run" status="notrun" result="suppressed" time="*" timestamp="*" classname="DisabledTest"/>
-  </testsuite>
-  <testsuite name="SkippedTest" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="Skipped" status="run" result="skipped" time="*" timestamp="*" classname="SkippedTest"/>
-  </testsuite>
-  <testsuite name="PropertyRecordingTest" tests="4" failures="0" disabled="0" errors="0" time="*" timestamp="*" SetUpTestSuite="yes" TearDownTestSuite="aye">
-    <testcase name="OneProperty" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_1" value="1"/>
-      </properties>
-    </testcase>
-    <testcase name="IntValuedProperty" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_int" value="1"/>
-      </properties>
-    </testcase>
-    <testcase name="ThreeProperties" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_1" value="1"/>
-        <property name="key_2" value="2"/>
-        <property name="key_3" value="3"/>
-      </properties>
-    </testcase>
-    <testcase name="TwoValuesForOneKeyUsesLastValue" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_1" value="2"/>
-      </properties>
-    </testcase>
-  </testsuite>
-  <testsuite name="NoFixtureTest" tests="3" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-     <testcase name="RecordProperty" status="run" result="completed" time="*" timestamp="*" classname="NoFixtureTest">
-       <properties>
-         <property name="key" value="1"/>
-       </properties>
-     </testcase>
-     <testcase name="ExternalUtilityThatCallsRecordIntValuedProperty" status="run" result="completed" time="*" timestamp="*" classname="NoFixtureTest">
-       <properties>
-         <property name="key_for_utility_int" value="1"/>
-       </properties>
-     </testcase>
-     <testcase name="ExternalUtilityThatCallsRecordStringValuedProperty" status="run" result="completed" time="*" timestamp="*" classname="NoFixtureTest">
-       <properties>
-         <property name="key_for_utility_string" value="1"/>
-       </properties>
-     </testcase>
-  </testsuite>
-  <testsuite name="Single/ValueParamTest" tests="4" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasValueParamAttribute/0" value_param="33" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-    <testcase name="HasValueParamAttribute/1" value_param="42" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-    <testcase name="AnotherTestThatHasValueParamAttribute/0" value_param="33" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-    <testcase name="AnotherTestThatHasValueParamAttribute/1" value_param="42" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-  </testsuite>
-  <testsuite name="TypedTest/0" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasTypeParamAttribute" type_param="*" status="run" result="completed" time="*" timestamp="*" classname="TypedTest/0" />
-  </testsuite>
-  <testsuite name="TypedTest/1" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasTypeParamAttribute" type_param="*" status="run" result="completed" time="*" timestamp="*" classname="TypedTest/1" />
-  </testsuite>
-  <testsuite name="Single/TypeParameterizedTestSuite/0" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasTypeParamAttribute" type_param="*" status="run" result="completed" time="*" timestamp="*" classname="Single/TypeParameterizedTestSuite/0" />
-  </testsuite>
-  <testsuite name="Single/TypeParameterizedTestSuite/1" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasTypeParamAttribute" type_param="*" status="run" result="completed" time="*" timestamp="*" classname="Single/TypeParameterizedTestSuite/1" />
-  </testsuite>
-</testsuites>""" % {
-    'stack': STACK_TRACE_TEMPLATE
-}
-
-EXPECTED_FILTERED_TEST_XML = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="1" failures="0" disabled="0" errors="0" time="*"
-            timestamp="*" name="AllTests" ad_hoc_property="42">
-  <testsuite name="SuccessfulTest" tests="1" failures="0" disabled="0"
-             errors="0" time="*" timestamp="*">
-    <testcase name="Succeeds" status="run" result="completed" time="*" timestamp="*" classname="SuccessfulTest"/>
-  </testsuite>
-</testsuites>"""
-
-EXPECTED_SHARDED_TEST_XML = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="3" failures="0" disabled="0" errors="0" time="*" timestamp="*" name="AllTests" ad_hoc_property="42">
-  <testsuite name="SuccessfulTest" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="Succeeds" status="run" result="completed" time="*" timestamp="*" classname="SuccessfulTest"/>
-  </testsuite>
-  <testsuite name="PropertyRecordingTest" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*" SetUpTestSuite="yes" TearDownTestSuite="aye">
-    <testcase name="TwoValuesForOneKeyUsesLastValue" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_1" value="2"/>
-      </properties>
-    </testcase>
-  </testsuite>
-  <testsuite name="Single/ValueParamTest" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="AnotherTestThatHasValueParamAttribute/0" value_param="33" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-  </testsuite>
-</testsuites>"""
-
-EXPECTED_EMPTY_XML = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="0" failures="0" disabled="0" errors="0" time="*"
-            timestamp="*" name="AllTests">
-</testsuites>"""
-
-GTEST_PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath(GTEST_PROGRAM_NAME)
-
-SUPPORTS_TYPED_TESTS = 'TypedTest' in gtest_test_utils.Subprocess(
-    [GTEST_PROGRAM_PATH, GTEST_LIST_TESTS_FLAG], capture_stderr=False).output
-
-
-class GTestXMLOutputUnitTest(gtest_xml_test_utils.GTestXMLTestCase):
-  """
-  Unit test for Google Test's XML output functionality.
-  """
-
-  # This test currently breaks on platforms that do not support typed and
-  # type-parameterized tests, so we don't run it under them.
-  if SUPPORTS_TYPED_TESTS:
-    def testNonEmptyXmlOutput(self):
-      """
-      Runs a test program that generates a non-empty XML output, and
-      tests that the XML output is expected.
-      """
-      self._TestXmlOutput(GTEST_PROGRAM_NAME, EXPECTED_NON_EMPTY_XML, 1)
-
-  def testEmptyXmlOutput(self):
-    """Verifies XML output for a Google Test binary without actual tests.
-
-    Runs a test program that generates an empty XML output, and
-    tests that the XML output is expected.
-    """
-
-    self._TestXmlOutput('gtest_no_test_unittest', EXPECTED_EMPTY_XML, 0)
-
-  def testTimestampValue(self):
-    """Checks whether the timestamp attribute in the XML output is valid.
-
-    Runs a test program that generates an empty XML output, and checks if
-    the timestamp attribute in the testsuites tag is valid.
-    """
-    actual = self._GetXmlOutput('gtest_no_test_unittest', [], {}, 0)
-    date_time_str = actual.documentElement.getAttributeNode('timestamp').value
-    # datetime.strptime() is only available in Python 2.5+ so we have to
-    # parse the expected datetime manually.
-    match = re.match(r'(\d+)-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)', date_time_str)
-    self.assertTrue(
-        re.match,
-        'XML datettime string %s has incorrect format' % date_time_str)
-    date_time_from_xml = datetime.datetime(
-        year=int(match.group(1)), month=int(match.group(2)),
-        day=int(match.group(3)), hour=int(match.group(4)),
-        minute=int(match.group(5)), second=int(match.group(6)))
-
-    time_delta = abs(datetime.datetime.now() - date_time_from_xml)
-    # timestamp value should be near the current local time
-    self.assertTrue(time_delta < datetime.timedelta(seconds=600),
-                    'time_delta is %s' % time_delta)
-    actual.unlink()
-
-  def testDefaultOutputFile(self):
-    """
-    Confirms that Google Test produces an XML output file with the expected
-    default name if no name is explicitly specified.
-    """
-    output_file = os.path.join(gtest_test_utils.GetTempDir(),
-                               GTEST_DEFAULT_OUTPUT_FILE)
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(
-        'gtest_no_test_unittest')
-    try:
-      os.remove(output_file)
-    except OSError:
-      e = sys.exc_info()[1]
-      if e.errno != errno.ENOENT:
-        raise
-
-    p = gtest_test_utils.Subprocess(
-        [gtest_prog_path, '%s=xml' % GTEST_OUTPUT_FLAG],
-        working_dir=gtest_test_utils.GetTempDir())
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-    self.assert_(os.path.isfile(output_file))
-
-  def testSuppressedXmlOutput(self):
-    """
-    Tests that no XML file is generated if the default XML listener is
-    shut down before RUN_ALL_TESTS is invoked.
-    """
-
-    xml_path = os.path.join(gtest_test_utils.GetTempDir(),
-                            GTEST_PROGRAM_NAME + 'out.xml')
-    if os.path.isfile(xml_path):
-      os.remove(xml_path)
-
-    command = [GTEST_PROGRAM_PATH,
-               '%s=xml:%s' % (GTEST_OUTPUT_FLAG, xml_path),
-               '--shut_down_xml']
-    p = gtest_test_utils.Subprocess(command)
-    if p.terminated_by_signal:
-      # p.signal is available only if p.terminated_by_signal is True.
-      self.assertFalse(
-          p.terminated_by_signal,
-          '%s was killed by signal %d' % (GTEST_PROGRAM_NAME, p.signal))
-    else:
-      self.assert_(p.exited)
-      self.assertEquals(1, p.exit_code,
-                        "'%s' exited with code %s, which doesn't match "
-                        'the expected exit code %s.'
-                        % (command, p.exit_code, 1))
-
-    self.assert_(not os.path.isfile(xml_path))
-
-  def testFilteredTestXmlOutput(self):
-    """Verifies XML output when a filter is applied.
-
-    Runs a test program that executes only some tests and verifies that
-    non-selected tests do not show up in the XML output.
-    """
-
-    self._TestXmlOutput(GTEST_PROGRAM_NAME, EXPECTED_FILTERED_TEST_XML, 0,
-                        extra_args=['%s=SuccessfulTest.*' % GTEST_FILTER_FLAG])
-
-  def testShardedTestXmlOutput(self):
-    """Verifies XML output when run using multiple shards.
-
-    Runs a test program that executes only one shard and verifies that tests
-    from other shards do not show up in the XML output.
-    """
-
-    self._TestXmlOutput(
-        GTEST_PROGRAM_NAME,
-        EXPECTED_SHARDED_TEST_XML,
-        0,
-        extra_env={SHARD_INDEX_ENV_VAR: '0',
-                   TOTAL_SHARDS_ENV_VAR: '10'})
-
-  def _GetXmlOutput(self, gtest_prog_name, extra_args, extra_env,
-                    expected_exit_code):
-    """
-    Returns the xml output generated by running the program gtest_prog_name.
-    Furthermore, the program's exit code must be expected_exit_code.
-    """
-    xml_path = os.path.join(gtest_test_utils.GetTempDir(),
-                            gtest_prog_name + 'out.xml')
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(gtest_prog_name)
-
-    command = ([gtest_prog_path, '%s=xml:%s' % (GTEST_OUTPUT_FLAG, xml_path)] +
-               extra_args)
-    environ_copy = os.environ.copy()
-    if extra_env:
-      environ_copy.update(extra_env)
-    p = gtest_test_utils.Subprocess(command, env=environ_copy)
-
-    if p.terminated_by_signal:
-      self.assert_(False,
-                   '%s was killed by signal %d' % (gtest_prog_name, p.signal))
-    else:
-      self.assert_(p.exited)
-      self.assertEquals(expected_exit_code, p.exit_code,
-                        "'%s' exited with code %s, which doesn't match "
-                        'the expected exit code %s.'
-                        % (command, p.exit_code, expected_exit_code))
-    actual = minidom.parse(xml_path)
-    return actual
-
-  def _TestXmlOutput(self, gtest_prog_name, expected_xml,
-                     expected_exit_code, extra_args=None, extra_env=None):
-    """
-    Asserts that the XML document generated by running the program
-    gtest_prog_name matches expected_xml, a string containing another
-    XML document.  Furthermore, the program's exit code must be
-    expected_exit_code.
-    """
-
-    actual = self._GetXmlOutput(gtest_prog_name, extra_args or [],
-                                extra_env or {}, expected_exit_code)
-    expected = minidom.parseString(expected_xml)
-    self.NormalizeXml(actual.documentElement)
-    self.AssertEquivalentNodes(expected.documentElement,
-                               actual.documentElement)
-    expected.unlink()
-    actual.unlink()
-
-
-if __name__ == '__main__':
-  os.environ['GTEST_STACK_TRACE_DEPTH'] = '1'
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/gtest_xml_output_unittest_.cc b/3rdparty/gtest/test/gtest_xml_output_unittest_.cc
deleted file mode 100644
index c95fd66c..00000000
--- a/3rdparty/gtest/test/gtest_xml_output_unittest_.cc
+++ /dev/null
@@ -1,188 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Unit test for Google Test XML output.
-//
-// A user can specify XML output in a Google Test program to run via
-// either the GTEST_OUTPUT environment variable or the --gtest_output
-// flag.  This is used for testing such functionality.
-//
-// This program will be invoked from a Python unit test.  Don't run it
-// directly.
-
-#include "gtest/gtest.h"
-
-using ::testing::InitGoogleTest;
-using ::testing::TestEventListeners;
-using ::testing::TestWithParam;
-using ::testing::UnitTest;
-using ::testing::Test;
-using ::testing::Values;
-
-class SuccessfulTest : public Test {
-};
-
-TEST_F(SuccessfulTest, Succeeds) {
-  SUCCEED() << "This is a success.";
-  ASSERT_EQ(1, 1);
-}
-
-class FailedTest : public Test {
-};
-
-TEST_F(FailedTest, Fails) {
-  ASSERT_EQ(1, 2);
-}
-
-class DisabledTest : public Test {
-};
-
-TEST_F(DisabledTest, DISABLED_test_not_run) {
-  FAIL() << "Unexpected failure: Disabled test should not be run";
-}
-
-class SkippedTest : public Test {
-};
-
-TEST_F(SkippedTest, Skipped) {
-  GTEST_SKIP();
-}
-
-TEST(MixedResultTest, Succeeds) {
-  EXPECT_EQ(1, 1);
-  ASSERT_EQ(1, 1);
-}
-
-TEST(MixedResultTest, Fails) {
-  EXPECT_EQ(1, 2);
-  ASSERT_EQ(2, 3);
-}
-
-TEST(MixedResultTest, DISABLED_test) {
-  FAIL() << "Unexpected failure: Disabled test should not be run";
-}
-
-TEST(XmlQuotingTest, OutputsCData) {
-  FAIL() << "XML output: "
-            "<?xml encoding=\"utf-8\"><top><![CDATA[cdata text]]></top>";
-}
-
-// Helps to test that invalid characters produced by test code do not make
-// it into the XML file.
-TEST(InvalidCharactersTest, InvalidCharactersInMessage) {
-  FAIL() << "Invalid characters in brackets [\x1\x2]";
-}
-
-class PropertyRecordingTest : public Test {
- public:
-  static void SetUpTestSuite() { RecordProperty("SetUpTestSuite", "yes"); }
-  static void TearDownTestSuite() {
-    RecordProperty("TearDownTestSuite", "aye");
-  }
-};
-
-TEST_F(PropertyRecordingTest, OneProperty) {
-  RecordProperty("key_1", "1");
-}
-
-TEST_F(PropertyRecordingTest, IntValuedProperty) {
-  RecordProperty("key_int", 1);
-}
-
-TEST_F(PropertyRecordingTest, ThreeProperties) {
-  RecordProperty("key_1", "1");
-  RecordProperty("key_2", "2");
-  RecordProperty("key_3", "3");
-}
-
-TEST_F(PropertyRecordingTest, TwoValuesForOneKeyUsesLastValue) {
-  RecordProperty("key_1", "1");
-  RecordProperty("key_1", "2");
-}
-
-TEST(NoFixtureTest, RecordProperty) {
-  RecordProperty("key", "1");
-}
-
-void ExternalUtilityThatCallsRecordProperty(const std::string& key, int value) {
-  testing::Test::RecordProperty(key, value);
-}
-
-void ExternalUtilityThatCallsRecordProperty(const std::string& key,
-                                            const std::string& value) {
-  testing::Test::RecordProperty(key, value);
-}
-
-TEST(NoFixtureTest, ExternalUtilityThatCallsRecordIntValuedProperty) {
-  ExternalUtilityThatCallsRecordProperty("key_for_utility_int", 1);
-}
-
-TEST(NoFixtureTest, ExternalUtilityThatCallsRecordStringValuedProperty) {
-  ExternalUtilityThatCallsRecordProperty("key_for_utility_string", "1");
-}
-
-// Verifies that the test parameter value is output in the 'value_param'
-// XML attribute for value-parameterized tests.
-class ValueParamTest : public TestWithParam<int> {};
-TEST_P(ValueParamTest, HasValueParamAttribute) {}
-TEST_P(ValueParamTest, AnotherTestThatHasValueParamAttribute) {}
-INSTANTIATE_TEST_SUITE_P(Single, ValueParamTest, Values(33, 42));
-
-#if GTEST_HAS_TYPED_TEST
-// Verifies that the type parameter name is output in the 'type_param'
-// XML attribute for typed tests.
-template <typename T> class TypedTest : public Test {};
-typedef testing::Types<int, long> TypedTestTypes;
-TYPED_TEST_SUITE(TypedTest, TypedTestTypes);
-TYPED_TEST(TypedTest, HasTypeParamAttribute) {}
-#endif
-
-#if GTEST_HAS_TYPED_TEST_P
-// Verifies that the type parameter name is output in the 'type_param'
-// XML attribute for type-parameterized tests.
-template <typename T>
-class TypeParameterizedTestSuite : public Test {};
-TYPED_TEST_SUITE_P(TypeParameterizedTestSuite);
-TYPED_TEST_P(TypeParameterizedTestSuite, HasTypeParamAttribute) {}
-REGISTER_TYPED_TEST_SUITE_P(TypeParameterizedTestSuite, HasTypeParamAttribute);
-typedef testing::Types<int, long> TypeParameterizedTestSuiteTypes;  // NOLINT
-INSTANTIATE_TYPED_TEST_SUITE_P(Single, TypeParameterizedTestSuite,
-                               TypeParameterizedTestSuiteTypes);
-#endif
-
-int main(int argc, char** argv) {
-  InitGoogleTest(&argc, argv);
-
-  if (argc > 1 && strcmp(argv[1], "--shut_down_xml") == 0) {
-    TestEventListeners& listeners = UnitTest::GetInstance()->listeners();
-    delete listeners.Release(listeners.default_xml_generator());
-  }
-  testing::Test::RecordProperty("ad_hoc_property", "42");
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/gtest_xml_test_utils.py b/3rdparty/gtest/test/gtest_xml_test_utils.py
deleted file mode 100644
index 9914a49e..00000000
--- a/3rdparty/gtest/test/gtest_xml_test_utils.py
+++ /dev/null
@@ -1,196 +0,0 @@
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test utilities for gtest_xml_output"""
-
-import re
-from xml.dom import minidom, Node
-import gtest_test_utils
-
-GTEST_DEFAULT_OUTPUT_FILE = 'test_detail.xml'
-
-class GTestXMLTestCase(gtest_test_utils.TestCase):
-  """
-  Base class for tests of Google Test's XML output functionality.
-  """
-
-
-  def AssertEquivalentNodes(self, expected_node, actual_node):
-    """
-    Asserts that actual_node (a DOM node object) is equivalent to
-    expected_node (another DOM node object), in that either both of
-    them are CDATA nodes and have the same value, or both are DOM
-    elements and actual_node meets all of the following conditions:
-
-    *  It has the same tag name as expected_node.
-    *  It has the same set of attributes as expected_node, each with
-       the same value as the corresponding attribute of expected_node.
-       Exceptions are any attribute named "time", which needs only be
-       convertible to a floating-point number and any attribute named
-       "type_param" which only has to be non-empty.
-    *  It has an equivalent set of child nodes (including elements and
-       CDATA sections) as expected_node.  Note that we ignore the
-       order of the children as they are not guaranteed to be in any
-       particular order.
-    """
-
-    if expected_node.nodeType == Node.CDATA_SECTION_NODE:
-      self.assertEquals(Node.CDATA_SECTION_NODE, actual_node.nodeType)
-      self.assertEquals(expected_node.nodeValue, actual_node.nodeValue)
-      return
-
-    self.assertEquals(Node.ELEMENT_NODE, actual_node.nodeType)
-    self.assertEquals(Node.ELEMENT_NODE, expected_node.nodeType)
-    self.assertEquals(expected_node.tagName, actual_node.tagName)
-
-    expected_attributes = expected_node.attributes
-    actual_attributes   = actual_node  .attributes
-    self.assertEquals(
-        expected_attributes.length, actual_attributes.length,
-        'attribute numbers differ in element %s:\nExpected: %r\nActual: %r' % (
-            actual_node.tagName, expected_attributes.keys(),
-            actual_attributes.keys()))
-    for i in range(expected_attributes.length):
-      expected_attr = expected_attributes.item(i)
-      actual_attr   = actual_attributes.get(expected_attr.name)
-      self.assert_(
-          actual_attr is not None,
-          'expected attribute %s not found in element %s' %
-          (expected_attr.name, actual_node.tagName))
-      self.assertEquals(
-          expected_attr.value, actual_attr.value,
-          ' values of attribute %s in element %s differ: %s vs %s' %
-          (expected_attr.name, actual_node.tagName,
-           expected_attr.value, actual_attr.value))
-
-    expected_children = self._GetChildren(expected_node)
-    actual_children = self._GetChildren(actual_node)
-    self.assertEquals(
-        len(expected_children), len(actual_children),
-        'number of child elements differ in element ' + actual_node.tagName)
-    for child_id, child in expected_children.items():
-      self.assert_(child_id in actual_children,
-                   '<%s> is not in <%s> (in element %s)' %
-                   (child_id, actual_children, actual_node.tagName))
-      self.AssertEquivalentNodes(child, actual_children[child_id])
-
-  identifying_attribute = {
-      'testsuites': 'name',
-      'testsuite': 'name',
-      'testcase': 'name',
-      'failure': 'message',
-      'property': 'name',
-  }
-
-  def _GetChildren(self, element):
-    """
-    Fetches all of the child nodes of element, a DOM Element object.
-    Returns them as the values of a dictionary keyed by the IDs of the
-    children.  For <testsuites>, <testsuite>, <testcase>, and <property>
-    elements, the ID is the value of their "name" attribute; for <failure>
-    elements, it is the value of the "message" attribute; for <properties>
-    elements, it is the value of their parent's "name" attribute plus the
-    literal string "properties"; CDATA sections and non-whitespace
-    text nodes are concatenated into a single CDATA section with ID
-    "detail".  An exception is raised if any element other than the above
-    four is encountered, if two child elements with the same identifying
-    attributes are encountered, or if any other type of node is encountered.
-    """
-
-    children = {}
-    for child in element.childNodes:
-      if child.nodeType == Node.ELEMENT_NODE:
-        if child.tagName == 'properties':
-          self.assert_(child.parentNode is not None,
-                       'Encountered <properties> element without a parent')
-          child_id = child.parentNode.getAttribute('name') + '-properties'
-        else:
-          self.assert_(child.tagName in self.identifying_attribute,
-                       'Encountered unknown element <%s>' % child.tagName)
-          child_id = child.getAttribute(
-              self.identifying_attribute[child.tagName])
-        self.assert_(child_id not in children)
-        children[child_id] = child
-      elif child.nodeType in [Node.TEXT_NODE, Node.CDATA_SECTION_NODE]:
-        if 'detail' not in children:
-          if (child.nodeType == Node.CDATA_SECTION_NODE or
-              not child.nodeValue.isspace()):
-            children['detail'] = child.ownerDocument.createCDATASection(
-                child.nodeValue)
-        else:
-          children['detail'].nodeValue += child.nodeValue
-      else:
-        self.fail('Encountered unexpected node type %d' % child.nodeType)
-    return children
-
-  def NormalizeXml(self, element):
-    """
-    Normalizes Google Test's XML output to eliminate references to transient
-    information that may change from run to run.
-
-    *  The "time" attribute of <testsuites>, <testsuite> and <testcase>
-       elements is replaced with a single asterisk, if it contains
-       only digit characters.
-    *  The "timestamp" attribute of <testsuites> elements is replaced with a
-       single asterisk, if it contains a valid ISO8601 datetime value.
-    *  The "type_param" attribute of <testcase> elements is replaced with a
-       single asterisk (if it sn non-empty) as it is the type name returned
-       by the compiler and is platform dependent.
-    *  The line info reported in the first line of the "message"
-       attribute and CDATA section of <failure> elements is replaced with the
-       file's basename and a single asterisk for the line number.
-    *  The directory names in file paths are removed.
-    *  The stack traces are removed.
-    """
-
-    if element.tagName in ('testsuites', 'testsuite', 'testcase'):
-      timestamp = element.getAttributeNode('timestamp')
-      timestamp.value = re.sub(r'^\d{4}-\d\d-\d\dT\d\d:\d\d:\d\d$',
-                               '*', timestamp.value)
-    if element.tagName in ('testsuites', 'testsuite', 'testcase'):
-      time = element.getAttributeNode('time')
-      time.value = re.sub(r'^\d+(\.\d+)?$', '*', time.value)
-      type_param = element.getAttributeNode('type_param')
-      if type_param and type_param.value:
-        type_param.value = '*'
-    elif element.tagName == 'failure':
-      source_line_pat = r'^.*[/\\](.*:)\d+\n'
-      # Replaces the source line information with a normalized form.
-      message = element.getAttributeNode('message')
-      message.value = re.sub(source_line_pat, '\\1*\n', message.value)
-      for child in element.childNodes:
-        if child.nodeType == Node.CDATA_SECTION_NODE:
-          # Replaces the source line information with a normalized form.
-          cdata = re.sub(source_line_pat, '\\1*\n', child.nodeValue)
-          # Removes the actual stack trace.
-          child.nodeValue = re.sub(r'Stack trace:\n(.|\n)*',
-                                   'Stack trace:\n*', cdata)
-    for child in element.childNodes:
-      if child.nodeType == Node.ELEMENT_NODE:
-        self.NormalizeXml(child)
diff --git a/3rdparty/gtest/test/production.cc b/3rdparty/gtest/test/production.cc
deleted file mode 100644
index 0f69f6db..00000000
--- a/3rdparty/gtest/test/production.cc
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// This is part of the unit test for gtest_prod.h.
-
-#include "production.h"
-
-PrivateCode::PrivateCode() : x_(0) {}
diff --git a/3rdparty/gtest/test/production.h b/3rdparty/gtest/test/production.h
deleted file mode 100644
index 542723b7..00000000
--- a/3rdparty/gtest/test/production.h
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// This is part of the unit test for gtest_prod.h.
-
-#ifndef GTEST_TEST_PRODUCTION_H_
-#define GTEST_TEST_PRODUCTION_H_
-
-#include "gtest/gtest_prod.h"
-
-class PrivateCode {
- public:
-  // Declares a friend test that does not use a fixture.
-  FRIEND_TEST(PrivateCodeTest, CanAccessPrivateMembers);
-
-  // Declares a friend test that uses a fixture.
-  FRIEND_TEST(PrivateCodeFixtureTest, CanAccessPrivateMembers);
-
-  PrivateCode();
-
-  int x() const { return x_; }
- private:
-  void set_x(int an_x) { x_ = an_x; }
-  int x_;
-};
-
-#endif  // GTEST_TEST_PRODUCTION_H_
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 046eb217..25cad5f3 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.11)
 project(cpp-ipc)
 
 option(LIBIPC_BUILD_TESTS       "Build all of libipc's own tests."                      OFF)
@@ -41,6 +41,18 @@ set(LIBRARY_OUTPUT_PATH    ${CMAKE_BINARY_DIR}/bin)
 set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin)
 set(LIBIPC_PROJECT_DIR     ${PROJECT_SOURCE_DIR})
 
+# FetchContent Support
+include(FetchContent)
+if(${CMAKE_VERSION} VERSION_LESS 3.14)
+  macro(FetchContent_MakeAvailable NAME)
+    FetchContent_GetProperties(${NAME})
+    if(NOT ${NAME}_POPULATED)
+      FetchContent_Populate(${NAME})
+      add_subdirectory(${${NAME}_SOURCE_DIR} ${${NAME}_BINARY_DIR})
+    endif()
+  endmacro()
+endif()
+
 # Unicode Support
 add_definitions(-DUNICODE -D_UNICODE)
 
@@ -48,13 +60,6 @@ add_subdirectory(3rdparty/fmt)
 add_subdirectory(src)
 
 if (LIBIPC_BUILD_TESTS)
-  set(GOOGLETEST_VERSION 1.10.0)
-  if (LIBIPC_USE_STATIC_CRT)
-      set(gtest_force_shared_crt OFF)
-  else()
-      set(gtest_force_shared_crt ON)
-  endif()
-  add_subdirectory(3rdparty/gtest)
   add_subdirectory(test)
 endif()
 
@@ -65,8 +70,6 @@ endif()
 # endif()
 
 if (LIBIPC_BUILD_BENCHMARK)
-  set(BENCHMARK_ENABLE_TESTING OFF)
-  add_subdirectory(3rdparty/benchmark)
   add_subdirectory(benchmark)
 endif()
 
diff --git a/benchmark/CMakeLists.txt b/benchmark/CMakeLists.txt
index 40879e87..0828b56f 100644
--- a/benchmark/CMakeLists.txt
+++ b/benchmark/CMakeLists.txt
@@ -10,6 +10,15 @@ else()
   add_definitions(-D_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING)
 endif()
 
+FetchContent_Declare(googlebenchmark
+  GIT_REPOSITORY https://github.com/google/benchmark.git
+  GIT_TAG        v1.7.0
+)
+set(BENCHMARK_ENABLE_TESTING OFF)
+set(BENCHMARK_ENABLE_INSTALL OFF)
+add_definitions(-DBENCHMARK_STATIC_DEFINE)
+FetchContent_MakeAvailable(googlebenchmark)
+
 include_directories(
   ${LIBIPC_PROJECT_DIR}/include 
   ${LIBIPC_PROJECT_DIR}/src
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index f534f3fc..1b0c4236 100755
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -8,6 +8,17 @@ if(NOT MSVC)
     -Wno-unused-function)
 endif()
 
+FetchContent_Declare(googletest
+  GIT_REPOSITORY https://github.com/google/googletest.git
+  GIT_TAG        v1.12.0
+)
+if (LIBIPC_USE_STATIC_CRT)
+  set(gtest_force_shared_crt OFF)
+else()
+  set(gtest_force_shared_crt ON)
+endif()
+FetchContent_MakeAvailable(googletest)
+
 include_directories(
   ${LIBIPC_PROJECT_DIR}/include 
   ${LIBIPC_PROJECT_DIR}/src
@@ -24,6 +35,4 @@ file(GLOB HEAD_FILES
 
 add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
 
-link_directories(${LIBIPC_PROJECT_DIR}/3rdparty/gperftools)
 target_link_libraries(${PROJECT_NAME} gtest_main imp pmr ipc)
-#target_link_libraries(${PROJECT_NAME} tcmalloc_minimal)

From 4981ce7b9c1381b27c71d2b68b341123b22f31a9 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 26 Nov 2022 14:57:36 +0800
Subject: [PATCH 106/272] del: 3rdparty

---
 3rdparty/fmt/.clang-format                    |     8 -
 3rdparty/fmt/.gitignore                       |    37 -
 3rdparty/fmt/CMakeLists.txt                   |   415 -
 3rdparty/fmt/CONTRIBUTING.md                  |    20 -
 3rdparty/fmt/ChangeLog.rst                    |  4738 -----
 3rdparty/fmt/LICENSE.rst                      |    27 -
 3rdparty/fmt/README.rst                       |   528 -
 3rdparty/fmt/doc/CMakeLists.txt               |    17 -
 3rdparty/fmt/doc/_static/bootstrap.min.js     |     7 -
 3rdparty/fmt/doc/_static/breathe.css          |    28 -
 .../fonts/glyphicons-halflings-regular.eot    |   Bin 20335 -> 0 bytes
 .../fonts/glyphicons-halflings-regular.svg    |   229 -
 .../fonts/glyphicons-halflings-regular.ttf    |   Bin 41280 -> 0 bytes
 .../fonts/glyphicons-halflings-regular.woff   |   Bin 23320 -> 0 bytes
 3rdparty/fmt/doc/_templates/layout.html       |   148 -
 3rdparty/fmt/doc/_templates/search.html       |    55 -
 3rdparty/fmt/doc/api.rst                      |   556 -
 3rdparty/fmt/doc/basic-bootstrap/README       |     2 -
 3rdparty/fmt/doc/basic-bootstrap/layout.html  |   208 -
 3rdparty/fmt/doc/basic-bootstrap/theme.conf   |     2 -
 3rdparty/fmt/doc/bootstrap/alerts.less        |    73 -
 3rdparty/fmt/doc/bootstrap/badges.less        |    66 -
 3rdparty/fmt/doc/bootstrap/bootstrap.less     |    50 -
 3rdparty/fmt/doc/bootstrap/breadcrumbs.less   |    26 -
 3rdparty/fmt/doc/bootstrap/button-groups.less |   243 -
 3rdparty/fmt/doc/bootstrap/buttons.less       |   160 -
 3rdparty/fmt/doc/bootstrap/carousel.less      |   269 -
 3rdparty/fmt/doc/bootstrap/close.less         |    34 -
 3rdparty/fmt/doc/bootstrap/code.less          |    69 -
 .../doc/bootstrap/component-animations.less   |    33 -
 3rdparty/fmt/doc/bootstrap/dropdowns.less     |   214 -
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diff --git a/3rdparty/fmt/.clang-format b/3rdparty/fmt/.clang-format
deleted file mode 100644
index df55d340..00000000
--- a/3rdparty/fmt/.clang-format
+++ /dev/null
@@ -1,8 +0,0 @@
-# Run manually to reformat a file:
-# clang-format -i --style=file <file>
-Language: Cpp
-BasedOnStyle: Google
-IndentPPDirectives: AfterHash
-IndentCaseLabels: false
-AlwaysBreakTemplateDeclarations: false
-DerivePointerAlignment: false
diff --git a/3rdparty/fmt/.gitignore b/3rdparty/fmt/.gitignore
deleted file mode 100644
index 8a37cb98..00000000
--- a/3rdparty/fmt/.gitignore
+++ /dev/null
@@ -1,37 +0,0 @@
-.vscode/
-.vs/
-
-*.iml
-.idea/
-.externalNativeBuild/
-.gradle/
-gradle/
-gradlew*
-local.properties
-build/
-support/.cxx
-
-bin/
-/_CPack_Packages
-/CMakeScripts
-/doc/doxyxml
-/doc/html
-/doc/node_modules
-virtualenv
-/Testing
-/install_manifest.txt
-*~
-*.a
-*.so*
-*.xcodeproj
-*.zip
-cmake_install.cmake
-CPack*.cmake
-fmt-*.cmake
-CTestTestfile.cmake
-CMakeCache.txt
-CMakeFiles
-FMT.build
-Makefile
-run-msbuild.bat
-fmt.pc
diff --git a/3rdparty/fmt/CMakeLists.txt b/3rdparty/fmt/CMakeLists.txt
deleted file mode 100644
index 3bf80f80..00000000
--- a/3rdparty/fmt/CMakeLists.txt
+++ /dev/null
@@ -1,415 +0,0 @@
-cmake_minimum_required(VERSION 3.1...3.18)
-
-# Fallback for using newer policies on CMake <3.12.
-if(${CMAKE_VERSION} VERSION_LESS 3.12)
-  cmake_policy(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION})
-endif()
-
-# Determine if fmt is built as a subproject (using add_subdirectory)
-# or if it is the master project.
-if (NOT DEFINED FMT_MASTER_PROJECT)
-  set(FMT_MASTER_PROJECT OFF)
-  if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
-    set(FMT_MASTER_PROJECT ON)
-    message(STATUS "CMake version: ${CMAKE_VERSION}")
-  endif ()
-endif ()
-
-# Joins arguments and places the results in ${result_var}.
-function(join result_var)
-  set(result "")
-  foreach (arg ${ARGN})
-    set(result "${result}${arg}")
-  endforeach ()
-  set(${result_var} "${result}" PARENT_SCOPE)
-endfunction()
-
-function(enable_module target)
-  if (MSVC)
-    set(BMI ${CMAKE_CURRENT_BINARY_DIR}/${target}.ifc)
-    target_compile_options(${target}
-      PRIVATE /interface /ifcOutput ${BMI}
-      INTERFACE /reference fmt=${BMI})
-  endif ()
-  set_target_properties(${target} PROPERTIES ADDITIONAL_CLEAN_FILES ${BMI})
-  set_source_files_properties(${BMI} PROPERTIES GENERATED ON)
-endfunction()
-
-include(CMakeParseArguments)
-
-# Sets a cache variable with a docstring joined from multiple arguments:
-#   set(<variable> <value>... CACHE <type> <docstring>...)
-# This allows splitting a long docstring for readability.
-function(set_verbose)
-  # cmake_parse_arguments is broken in CMake 3.4 (cannot parse CACHE) so use
-  # list instead.
-  list(GET ARGN 0 var)
-  list(REMOVE_AT ARGN 0)
-  list(GET ARGN 0 val)
-  list(REMOVE_AT ARGN 0)
-  list(REMOVE_AT ARGN 0)
-  list(GET ARGN 0 type)
-  list(REMOVE_AT ARGN 0)
-  join(doc ${ARGN})
-  set(${var} ${val} CACHE ${type} ${doc})
-endfunction()
-
-# Set the default CMAKE_BUILD_TYPE to Release.
-# This should be done before the project command since the latter can set
-# CMAKE_BUILD_TYPE itself (it does so for nmake).
-if (FMT_MASTER_PROJECT AND NOT CMAKE_BUILD_TYPE)
-  set_verbose(CMAKE_BUILD_TYPE Release CACHE STRING
-              "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or "
-              "CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.")
-endif ()
-
-project(FMT CXX)
-include(GNUInstallDirs)
-set_verbose(FMT_INC_DIR ${CMAKE_INSTALL_INCLUDEDIR} CACHE STRING
-            "Installation directory for include files, a relative path that "
-            "will be joined with ${CMAKE_INSTALL_PREFIX} or an absolute path.")
-
-option(FMT_PEDANTIC "Enable extra warnings and expensive tests." OFF)
-option(FMT_WERROR "Halt the compilation with an error on compiler warnings."
-       OFF)
-
-# Options that control generation of various targets.
-option(FMT_DOC "Generate the doc target." ${FMT_MASTER_PROJECT})
-option(FMT_INSTALL "Generate the install target." ${FMT_MASTER_PROJECT})
-option(FMT_TEST "Generate the test target." ${FMT_MASTER_PROJECT})
-option(FMT_FUZZ "Generate the fuzz target." OFF)
-option(FMT_CUDA_TEST "Generate the cuda-test target." OFF)
-option(FMT_OS "Include core requiring OS (Windows/Posix) " ON)
-option(FMT_MODULE "Build a module instead of a traditional library." OFF)
-option(FMT_SYSTEM_HEADERS "Expose headers with marking them as system." OFF)
-
-set(FMT_CAN_MODULE OFF)
-if (CMAKE_CXX_STANDARD GREATER 17 AND
-    # msvc 16.10-pre4
-    MSVC AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 19.29.30035)
-  set(FMT_CAN_MODULE OFF)
-endif ()
-if (NOT FMT_CAN_MODULE)
-  set(FMT_MODULE OFF)
-  message(STATUS "Module support is disabled.")
-endif ()
-if (FMT_TEST AND FMT_MODULE)
-  # The tests require {fmt} to be compiled as traditional library
-  message(STATUS "Testing is incompatible with build mode 'module'.")
-endif ()
-set(FMT_SYSTEM_HEADERS_ATTRIBUTE "")
-if (FMT_SYSTEM_HEADERS)
-  set(FMT_SYSTEM_HEADERS_ATTRIBUTE SYSTEM)
-endif ()
-
-# Get version from core.h
-file(READ include/fmt/core.h core_h)
-if (NOT core_h MATCHES "FMT_VERSION ([0-9]+)([0-9][0-9])([0-9][0-9])")
-  message(FATAL_ERROR "Cannot get FMT_VERSION from core.h.")
-endif ()
-# Use math to skip leading zeros if any.
-math(EXPR CPACK_PACKAGE_VERSION_MAJOR ${CMAKE_MATCH_1})
-math(EXPR CPACK_PACKAGE_VERSION_MINOR ${CMAKE_MATCH_2})
-math(EXPR CPACK_PACKAGE_VERSION_PATCH ${CMAKE_MATCH_3})
-join(FMT_VERSION ${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.
-                 ${CPACK_PACKAGE_VERSION_PATCH})
-message(STATUS "Version: ${FMT_VERSION}")
-
-message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
-
-if (NOT CMAKE_RUNTIME_OUTPUT_DIRECTORY)
-  set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
-endif ()
-
-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
-  "${CMAKE_CURRENT_SOURCE_DIR}/support/cmake")
-
-include(cxx14)
-include(CheckCXXCompilerFlag)
-include(JoinPaths)
-
-list(FIND CMAKE_CXX_COMPILE_FEATURES "cxx_variadic_templates" index)
-if (${index} GREATER -1)
-  # Use cxx_variadic_templates instead of more appropriate cxx_std_11 for
-  # compatibility with older CMake versions.
-  set(FMT_REQUIRED_FEATURES cxx_variadic_templates)
-endif ()
-message(STATUS "Required features: ${FMT_REQUIRED_FEATURES}")
-
-if (FMT_MASTER_PROJECT AND NOT DEFINED CMAKE_CXX_VISIBILITY_PRESET)
-  set_verbose(CMAKE_CXX_VISIBILITY_PRESET hidden CACHE STRING
-              "Preset for the export of private symbols")
-  set_property(CACHE CMAKE_CXX_VISIBILITY_PRESET PROPERTY STRINGS
-               hidden default)
-endif ()
-
-if (FMT_MASTER_PROJECT AND NOT DEFINED CMAKE_VISIBILITY_INLINES_HIDDEN)
-  set_verbose(CMAKE_VISIBILITY_INLINES_HIDDEN ON CACHE BOOL
-              "Whether to add a compile flag to hide symbols of inline functions")
-endif ()
-
-if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
-  set(PEDANTIC_COMPILE_FLAGS -pedantic-errors -Wall -Wextra -pedantic
-      -Wold-style-cast -Wundef
-      -Wredundant-decls -Wwrite-strings -Wpointer-arith
-      -Wcast-qual -Wformat=2 -Wmissing-include-dirs
-      -Wcast-align
-      -Wctor-dtor-privacy -Wdisabled-optimization
-      -Winvalid-pch -Woverloaded-virtual
-      -Wconversion -Wundef
-      -Wno-ctor-dtor-privacy -Wno-format-nonliteral)
-  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.6)
-      set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS}
-         -Wno-dangling-else -Wno-unused-local-typedefs)
-  endif ()
-  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
-      set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wdouble-promotion
-          -Wtrampolines -Wzero-as-null-pointer-constant -Wuseless-cast
-          -Wvector-operation-performance -Wsized-deallocation -Wshadow)
-  endif ()
-  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.0)
-      set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wshift-overflow=2
-          -Wnull-dereference -Wduplicated-cond)
-  endif ()
-  set(WERROR_FLAG -Werror)
-endif ()
-
-if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-  set(PEDANTIC_COMPILE_FLAGS -Wall -Wextra -pedantic -Wconversion -Wundef
-      -Wdeprecated -Wweak-vtables -Wshadow
-      -Wno-gnu-zero-variadic-macro-arguments)
-  check_cxx_compiler_flag(-Wzero-as-null-pointer-constant HAS_NULLPTR_WARNING)
-  if (HAS_NULLPTR_WARNING)
-    set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS}
-        -Wzero-as-null-pointer-constant)
-  endif ()
-  set(WERROR_FLAG -Werror)
-endif ()
-
-if (MSVC)
-  set(PEDANTIC_COMPILE_FLAGS /W3)
-  set(WERROR_FLAG /WX)
-endif ()
-
-if (FMT_MASTER_PROJECT AND CMAKE_GENERATOR MATCHES "Visual Studio")
-  # If Microsoft SDK is installed create script run-msbuild.bat that
-  # calls SetEnv.cmd to set up build environment and runs msbuild.
-  # It is useful when building Visual Studio projects with the SDK
-  # toolchain rather than Visual Studio.
-  include(FindSetEnv)
-  if (WINSDK_SETENV)
-    set(MSBUILD_SETUP "call \"${WINSDK_SETENV}\"")
-  endif ()
-  # Set FrameworkPathOverride to get rid of MSB3644 warnings.
-  join(netfxpath
-       "C:\\Program Files\\Reference Assemblies\\Microsoft\\Framework\\"
-       ".NETFramework\\v4.0")
-  file(WRITE run-msbuild.bat "
-    ${MSBUILD_SETUP}
-    ${CMAKE_MAKE_PROGRAM} -p:FrameworkPathOverride=\"${netfxpath}\" %*")
-endif ()
-
-set(strtod_l_headers stdlib.h)
-if (APPLE)
-  set(strtod_l_headers ${strtod_l_headers} xlocale.h)
-endif ()
-
-include(CheckSymbolExists)
-if (WIN32)
-  check_symbol_exists(_strtod_l "${strtod_l_headers}" HAVE_STRTOD_L)
-else ()
-  check_symbol_exists(strtod_l "${strtod_l_headers}" HAVE_STRTOD_L)
-endif ()
-
-function(add_headers VAR)
-  set(headers ${${VAR}})
-  foreach (header ${ARGN})
-    set(headers ${headers} include/fmt/${header})
-  endforeach()
-  set(${VAR} ${headers} PARENT_SCOPE)
-endfunction()
-
-# Define the fmt library, its includes and the needed defines.
-add_headers(FMT_HEADERS args.h chrono.h color.h compile.h core.h format.h
-                        format-inl.h locale.h os.h ostream.h printf.h ranges.h
-                        xchar.h)
-if (FMT_MODULE)
-  set(FMT_SOURCES src/fmt.cc)
-elseif (FMT_OS)
-  set(FMT_SOURCES src/format.cc src/os.cc)
-else()
-  set(FMT_SOURCES src/format.cc)
-endif ()
-
-add_library(fmt ${FMT_SOURCES} ${FMT_HEADERS} README.rst ChangeLog.rst)
-add_library(fmt::fmt ALIAS fmt)
-
-if (HAVE_STRTOD_L)
-  target_compile_definitions(fmt PUBLIC FMT_LOCALE)
-endif ()
-
-if (MINGW)
-  check_cxx_compiler_flag("-Wa,-mbig-obj" FMT_HAS_MBIG_OBJ)
-  if (${FMT_HAS_MBIG_OBJ})
-    target_compile_options(fmt PUBLIC "-Wa,-mbig-obj")
-  endif()
-endif ()
-
-if (FMT_WERROR)
-  target_compile_options(fmt PRIVATE ${WERROR_FLAG})
-endif ()
-if (FMT_PEDANTIC)
-  target_compile_options(fmt PRIVATE ${PEDANTIC_COMPILE_FLAGS})
-endif ()
-if (FMT_MODULE)
-  enable_module(fmt)
-endif ()
-
-target_compile_features(fmt INTERFACE ${FMT_REQUIRED_FEATURES})
-
-target_include_directories(fmt ${FMT_SYSTEM_HEADERS_ATTRIBUTE} PUBLIC
-  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-  $<INSTALL_INTERFACE:${FMT_INC_DIR}>)
-
-set(FMT_DEBUG_POSTFIX d CACHE STRING "Debug library postfix.")
-
-set_target_properties(fmt PROPERTIES
-  VERSION ${FMT_VERSION} SOVERSION ${CPACK_PACKAGE_VERSION_MAJOR}
-  DEBUG_POSTFIX "${FMT_DEBUG_POSTFIX}")
-
-# Set FMT_LIB_NAME for pkg-config fmt.pc. We cannot use the OUTPUT_NAME target
-# property because it's not set by default.
-set(FMT_LIB_NAME fmt)
-if (CMAKE_BUILD_TYPE STREQUAL "Debug")
-  set(FMT_LIB_NAME ${FMT_LIB_NAME}${FMT_DEBUG_POSTFIX})
-endif ()
-
-if (BUILD_SHARED_LIBS)
-  if (UNIX AND NOT APPLE AND NOT ${CMAKE_SYSTEM_NAME} MATCHES "SunOS" AND
-      NOT EMSCRIPTEN)
-    # Fix rpmlint warning:
-    # unused-direct-shlib-dependency /usr/lib/libformat.so.1.1.0 /lib/libm.so.6.
-    target_link_libraries(fmt -Wl,--as-needed)
-  endif ()
-  target_compile_definitions(fmt PRIVATE FMT_EXPORT INTERFACE FMT_SHARED)
-endif ()
-if (FMT_SAFE_DURATION_CAST)
-  target_compile_definitions(fmt PUBLIC FMT_SAFE_DURATION_CAST)
-endif()
-
-add_library(fmt-header-only INTERFACE)
-add_library(fmt::fmt-header-only ALIAS fmt-header-only)
-
-target_compile_definitions(fmt-header-only INTERFACE FMT_HEADER_ONLY=1)
-target_compile_features(fmt-header-only INTERFACE ${FMT_REQUIRED_FEATURES})
-
-target_include_directories(fmt-header-only ${FMT_SYSTEM_HEADERS_ATTRIBUTE} INTERFACE
-  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-  $<INSTALL_INTERFACE:${FMT_INC_DIR}>)
-
-# Install targets.
-if (FMT_INSTALL)
-  include(CMakePackageConfigHelpers)
-  set_verbose(FMT_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/fmt CACHE STRING
-              "Installation directory for cmake files, a relative path that "
-              "will be joined with ${CMAKE_INSTALL_PREFIX} or an absolute "
-              "path.")
-  set(version_config ${PROJECT_BINARY_DIR}/fmt-config-version.cmake)
-  set(project_config ${PROJECT_BINARY_DIR}/fmt-config.cmake)
-  set(pkgconfig ${PROJECT_BINARY_DIR}/fmt.pc)
-  set(targets_export_name fmt-targets)
-
-  set_verbose(FMT_LIB_DIR ${CMAKE_INSTALL_LIBDIR} CACHE STRING
-              "Installation directory for libraries, a relative path that "
-              "will be joined to ${CMAKE_INSTALL_PREFIX} or an absolute path.")
-
-  set_verbose(FMT_PKGCONFIG_DIR ${CMAKE_INSTALL_LIBDIR}/pkgconfig CACHE PATH
-              "Installation directory for pkgconfig (.pc) files, a relative "
-              "path that will be joined with ${CMAKE_INSTALL_PREFIX} or an "
-              "absolute path.")
-
-  # Generate the version, config and target files into the build directory.
-  write_basic_package_version_file(
-    ${version_config}
-    VERSION ${FMT_VERSION}
-    COMPATIBILITY AnyNewerVersion)
-
-  join_paths(libdir_for_pc_file "\${exec_prefix}" "${FMT_LIB_DIR}")
-  join_paths(includedir_for_pc_file "\${prefix}" "${FMT_INC_DIR}")
-
-  configure_file(
-    "${PROJECT_SOURCE_DIR}/support/cmake/fmt.pc.in"
-    "${pkgconfig}"
-    @ONLY)
-  configure_package_config_file(
-    ${PROJECT_SOURCE_DIR}/support/cmake/fmt-config.cmake.in
-    ${project_config}
-    INSTALL_DESTINATION ${FMT_CMAKE_DIR})
-
-  set(INSTALL_TARGETS fmt fmt-header-only)
-
-  # Install the library and headers.
-  install(TARGETS ${INSTALL_TARGETS} EXPORT ${targets_export_name}
-          LIBRARY DESTINATION ${FMT_LIB_DIR}
-          ARCHIVE DESTINATION ${FMT_LIB_DIR}
-          RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-
-  # Use a namespace because CMake provides better diagnostics for namespaced
-  # imported targets.
-  export(TARGETS ${INSTALL_TARGETS} NAMESPACE fmt::
-         FILE ${PROJECT_BINARY_DIR}/${targets_export_name}.cmake)
-
-  # Install version, config and target files.
-  install(
-    FILES ${project_config} ${version_config}
-    DESTINATION ${FMT_CMAKE_DIR})
-  install(EXPORT ${targets_export_name} DESTINATION ${FMT_CMAKE_DIR}
-          NAMESPACE fmt::)
-
-  install(FILES $<TARGET_PDB_FILE:${INSTALL_TARGETS}>
-          DESTINATION ${FMT_LIB_DIR} OPTIONAL)
-  install(FILES ${FMT_HEADERS} DESTINATION "${FMT_INC_DIR}/fmt")
-  install(FILES "${pkgconfig}" DESTINATION "${FMT_PKGCONFIG_DIR}")
-endif ()
-
-if (FMT_DOC)
-  add_subdirectory(doc)
-endif ()
-
-if (FMT_TEST)
-  enable_testing()
-  add_subdirectory(test)
-endif ()
-
-# Control fuzzing independent of the unit tests.
-if (FMT_FUZZ)
-  add_subdirectory(test/fuzzing)
-
-  # The FMT_FUZZ macro is used to prevent resource exhaustion in fuzzing
-  # mode and make fuzzing practically possible. It is similar to
-  # FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION but uses a different name to
-  # avoid interfering with fuzzing of projects that use {fmt}.
-  # See also https://llvm.org/docs/LibFuzzer.html#fuzzer-friendly-build-mode.
-  target_compile_definitions(fmt PUBLIC FMT_FUZZ)
-endif ()
-
-set(gitignore ${PROJECT_SOURCE_DIR}/.gitignore)
-if (FMT_MASTER_PROJECT AND EXISTS ${gitignore})
-  # Get the list of ignored files from .gitignore.
-  file (STRINGS ${gitignore} lines)
-  list(REMOVE_ITEM lines /doc/html)
-  foreach (line ${lines})
-    string(REPLACE "." "[.]" line "${line}")
-    string(REPLACE "*" ".*" line "${line}")
-    set(ignored_files ${ignored_files} "${line}$" "${line}/")
-  endforeach ()
-  set(ignored_files ${ignored_files}
-    /.git /breathe /format-benchmark sphinx/ .buildinfo .doctrees)
-
-  set(CPACK_SOURCE_GENERATOR ZIP)
-  set(CPACK_SOURCE_IGNORE_FILES ${ignored_files})
-  set(CPACK_SOURCE_PACKAGE_FILE_NAME fmt-${FMT_VERSION})
-  set(CPACK_PACKAGE_NAME fmt)
-  set(CPACK_RESOURCE_FILE_README ${PROJECT_SOURCE_DIR}/README.rst)
-  include(CPack)
-endif ()
diff --git a/3rdparty/fmt/CONTRIBUTING.md b/3rdparty/fmt/CONTRIBUTING.md
deleted file mode 100644
index b82f1450..00000000
--- a/3rdparty/fmt/CONTRIBUTING.md
+++ /dev/null
@@ -1,20 +0,0 @@
-Contributing to {fmt}
-=====================
-
-By submitting a pull request or a patch, you represent that you have the right
-to license your contribution to the {fmt} project owners and the community,
-agree that your contributions are licensed under the {fmt} license, and agree
-to future changes to the licensing.
-
-All C++ code must adhere to [Google C++ Style Guide](
-https://google.github.io/styleguide/cppguide.html) with the following
-exceptions:
-
-* Exceptions are permitted
-* snake_case should be used instead of UpperCamelCase for function and type
-  names
-
-All documentation must adhere to the [Google Developer Documentation Style
-Guide](https://developers.google.com/style).
-
-Thanks for contributing!
diff --git a/3rdparty/fmt/ChangeLog.rst b/3rdparty/fmt/ChangeLog.rst
deleted file mode 100644
index 18b84c7d..00000000
--- a/3rdparty/fmt/ChangeLog.rst
+++ /dev/null
@@ -1,4738 +0,0 @@
-8.1.1 - 2022-01-06
-------------------
-
-* Restored ABI compatibility with version 8.0.x
-  (`#2695 <https://github.com/fmtlib/fmt/issues/2695>`_,
-  `#2696 <https://github.com/fmtlib/fmt/pull/2696>`_).
-  Thanks `@saraedum (Julian Rüth) <https://github.com/saraedum>`_.
-
-* Fixed chorno formatting on big endian systems
-  (`#2698 <https://github.com/fmtlib/fmt/issues/2698>`_,
-  `#2699 <https://github.com/fmtlib/fmt/pull/2699>`_).
-  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_ and
-  `@xvitaly (Vitaly Zaitsev) <https://github.com/xvitaly>`_.
-
-* Fixed a linkage error with mingw
-  (`#2691 <https://github.com/fmtlib/fmt/issues/2691>`_,
-  `#2692 <https://github.com/fmtlib/fmt/pull/2692>`_).
-  Thanks `@rbberger (Richard Berger) <https://github.com/rbberger>`_.
-
-8.1.0 - 2022-01-02
-------------------
-
-* Optimized chrono formatting
-  (`#2500 <https://github.com/fmtlib/fmt/pull/2500>`_,
-  `#2537 <https://github.com/fmtlib/fmt/pull/2537>`_,
-  `#2541 <https://github.com/fmtlib/fmt/issues/2541>`_,
-  `#2544 <https://github.com/fmtlib/fmt/pull/2544>`_,
-  `#2550 <https://github.com/fmtlib/fmt/pull/2550>`_,
-  `#2551 <https://github.com/fmtlib/fmt/pull/2551>`_,
-  `#2576 <https://github.com/fmtlib/fmt/pull/2576>`_,
-  `#2577 <https://github.com/fmtlib/fmt/issues/2577>`_,
-  `#2586 <https://github.com/fmtlib/fmt/pull/2586>`_,
-  `#2591 <https://github.com/fmtlib/fmt/pull/2591>`_,
-  `#2594 <https://github.com/fmtlib/fmt/pull/2594>`_,
-  `#2602 <https://github.com/fmtlib/fmt/pull/2602>`_,
-  `#2617 <https://github.com/fmtlib/fmt/pull/2617>`_,
-  `#2628 <https://github.com/fmtlib/fmt/issues/2628>`_,
-  `#2633 <https://github.com/fmtlib/fmt/pull/2633>`_,
-  `#2670 <https://github.com/fmtlib/fmt/issues/2670>`_,
-  `#2671 <https://github.com/fmtlib/fmt/pull/2671>`_).
-
-  Processing of some specifiers such as ``%z`` and ``%Y`` is now up to 10-20
-  times faster, for example on GCC 11 with libstdc++::
-
-    ----------------------------------------------------------------------------
-    Benchmark                                  Before             After
-    ----------------------------------------------------------------------------
-    FMTFormatter_z                             261 ns             26.3 ns
-    FMTFormatterCompile_z                      246 ns             11.6 ns
-    FMTFormatter_Y                             263 ns             26.1 ns
-    FMTFormatterCompile_Y                      244 ns             10.5 ns
-    ----------------------------------------------------------------------------
-
-  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_ and
-  `@toughengineer (Pavel Novikov) <https://github.com/toughengineer>`_.
-
-* Implemented subsecond formatting for chrono durations
-  (`#2623 <https://github.com/fmtlib/fmt/pull/2623>`_).
-  For example (`godbolt <https://godbolt.org/z/es7vWTETe>`__):
-
-  .. code:: c++
-
-     #include <fmt/chrono.h>
-
-     int main() {
-       fmt::print("{:%S}", std::chrono::milliseconds(1234));
-     }
-
-  prints "01.234".
-
-  Thanks `@matrackif <https://github.com/matrackif>`_.
-
-* Fixed handling of precision 0 when formatting chrono durations
-  (`#2587 <https://github.com/fmtlib/fmt/issues/2587>`_,
-  `#2588 <https://github.com/fmtlib/fmt/pull/2588>`_).
-  Thanks `@lukester1975 <https://github.com/lukester1975>`_.
-
-* Fixed an overflow on invalid inputs in the ``tm`` formatter
-  (`#2564 <https://github.com/fmtlib/fmt/pull/2564>`_).
-  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
-
-* Added ``fmt::group_digits`` that formats integers with a non-localized digit
-  separator (comma) for groups of three digits.
-  For example (`godbolt <https://godbolt.org/z/TxGxG9Poq>`__):
-
-  .. code:: c++
-
-     #include <fmt/format.h>
-
-     int main() {
-       fmt::print("{} dollars", fmt::group_digits(1000000));
-     }
-
-  prints "1,000,000 dollars".
-
-* Added support for faint, conceal, reverse and blink text styles
-  (`#2394 <https://github.com/fmtlib/fmt/pull/2394>`_):
-
-  https://user-images.githubusercontent.com/576385/147710227-c68f5317-f8fa-42c3-9123-7c4ba3c398cb.mp4
-
-  Thanks `@benit8 (Benoît Lormeau) <https://github.com/benit8>`_ and
-  `@data-man (Dmitry Atamanov) <https://github.com/data-man>`_.
-
-* Added experimental support for compile-time floating point formatting
-  (`#2426 <https://github.com/fmtlib/fmt/pull/2426>`_,
-  `#2470 <https://github.com/fmtlib/fmt/pull/2470>`_).
-  It is currently limited to the header-only mode.
-  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
-
-* Added UDL-based named argument support to compile-time format string checks
-  (`#2640 <https://github.com/fmtlib/fmt/issues/2640>`_,
-  `#2649 <https://github.com/fmtlib/fmt/pull/2649>`_).
-  For example (`godbolt <https://godbolt.org/z/ohGbbvonv>`__):
-
-  .. code:: c++
-
-     #include <fmt/format.h>
-
-     int main() {
-       using namespace fmt::literals;
-       fmt::print("{answer:s}", "answer"_a=42);
-     }
-
-  gives a compile-time error on compilers with C++20 ``consteval`` and non-type
-  template parameter support (gcc 10+) because ``s`` is not a valid format
-  specifier for an integer.
-
-  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
-
-* Implemented escaping of string range elements.
-  For example (`godbolt <https://godbolt.org/z/rKvM1vKf3>`__):
-
-  .. code:: c++
-
-     #include <fmt/ranges.h>
-     #include <vector>
-
-     int main() {
-       fmt::print("{}", std::vector<std::string>{"\naan"});
-     }
-
-  is now printed as::
-
-    ["\naan"]
-
-  instead of::
-  
-    ["
-    aan"]
-
-* Switched to JSON-like representation of maps and sets for consistency with
-  Python's ``str.format``.
-  For example (`godbolt <https://godbolt.org/z/seKjoY9W5>`__):
-
-  .. code:: c++
-
-     #include <fmt/ranges.h>
-     #include <map>
-
-     int main() {
-       fmt::print("{}", std::map<std::string, int>{{"answer", 42}});
-     }
-
-  is now printed as::
-
-    {"answer": 42}
-
-* Extended ``fmt::join`` to support C++20-only ranges
-  (`#2549 <https://github.com/fmtlib/fmt/pull/2549>`_).
-  Thanks `@BRevzin (Barry Revzin) <https://github.com/BRevzin>`_.
-
-* Optimized handling of non-const-iterable ranges and implemented initial
-  support for non-const-formattable types.
-
-* Disabled implicit conversions of scoped enums to integers that was
-  accidentally introduced in earlier versions
-  (`#1841 <https://github.com/fmtlib/fmt/pull/1841>`_).
-
-* Deprecated implicit conversion of ``[const] signed char*`` and 
-  ``[const] unsigned char*`` to C strings.
-
-* Deprecated ``_format``, a legacy UDL-based format API
-  (`#2646 <https://github.com/fmtlib/fmt/pull/2646>`_).
-  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
-
-* Marked ``format``, ``formatted_size`` and ``to_string`` as ``[[nodiscard]]``
-  (`#2612 <https://github.com/fmtlib/fmt/pull/2612>`_).
-  `@0x8000-0000 (Florin Iucha) <https://github.com/0x8000-0000>`_.
-
-* Added missing diagnostic when trying to format function and member pointers
-  as well as objects convertible to pointers which is explicitly disallowed
-  (`#2598 <https://github.com/fmtlib/fmt/issues/2598>`_,
-  `#2609 <https://github.com/fmtlib/fmt/pull/2609>`_,
-  `#2610 <https://github.com/fmtlib/fmt/pull/2610>`_).
-  Thanks `@AlexGuteniev (Alex Guteniev) <https://github.com/AlexGuteniev>`_.
-
-* Optimized writing to a contiguous buffer with ``format_to_n``
-  (`#2489 <https://github.com/fmtlib/fmt/pull/2489>`_).
-  Thanks `@Roman-Koshelev <https://github.com/Roman-Koshelev>`_.
-
-* Optimized writing to non-``char`` buffers
-  (`#2477 <https://github.com/fmtlib/fmt/pull/2477>`_).
-  Thanks `@Roman-Koshelev <https://github.com/Roman-Koshelev>`_.
-
-* Decimal point is now localized when using the ``L`` specifier.
-
-* Improved floating point formatter implementation
-  (`#2498 <https://github.com/fmtlib/fmt/pull/2498>`_,
-  `#2499 <https://github.com/fmtlib/fmt/pull/2499>`_).
-  Thanks `@Roman-Koshelev <https://github.com/Roman-Koshelev>`_.
-
-* Fixed handling of very large precision in fixed format
-  (`#2616 <https://github.com/fmtlib/fmt/pull/2616>`_).
-
-* Made a table of cached powers used in FP formatting static
-  (`#2509 <https://github.com/fmtlib/fmt/pull/2509>`_).
-  Thanks `@jk-jeon (Junekey Jeon) <https://github.com/jk-jeon>`_.
-
-* Resolved a lookup ambiguity with C++20 format-related functions due to ADL
-  (`#2639 <https://github.com/fmtlib/fmt/issues/2639>`_,
-  `#2641 <https://github.com/fmtlib/fmt/pull/2641>`_).
-  Thanks `@mkurdej (Marek Kurdej) <https://github.com/mkurdej>`_.
-
-* Removed unnecessary inline namespace qualification
-  (`#2642 <https://github.com/fmtlib/fmt/issues/2642>`_,
-  `#2643 <https://github.com/fmtlib/fmt/pull/2643>`_).
-  Thanks `@mkurdej (Marek Kurdej) <https://github.com/mkurdej>`_.
-
-* Implemented argument forwarding in ``format_to_n``
-  (`#2462 <https://github.com/fmtlib/fmt/issues/2462>`_,
-  `#2463 <https://github.com/fmtlib/fmt/pull/2463>`_).
-  Thanks `@owent (WenTao Ou) <https://github.com/owent>`_.
-
-* Fixed handling of implicit conversions in ``fmt::to_string`` and format string
-  compilation (`#2565 <https://github.com/fmtlib/fmt/issues/2565>`_).
-
-* Changed the default access mode of files created by ``fmt::output_file`` to
-  ``-rw-r--r--`` for consistency with ``fopen``
-  (`#2530 <https://github.com/fmtlib/fmt/issues/2530>`_).
-
-* Make ``fmt::ostream::flush`` public
-  (`#2435 <https://github.com/fmtlib/fmt/issues/2435>`_).
-
-* Improved C++14/17 attribute detection
-  (`#2615 <https://github.com/fmtlib/fmt/pull/2615>`_).
-  Thanks `@AlexGuteniev (Alex Guteniev) <https://github.com/AlexGuteniev>`_.
-
-* Improved ``consteval`` detection for MSVC
-  (`#2559 <https://github.com/fmtlib/fmt/pull/2559>`_).
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
-
-* Improved documentation
-  (`#2406 <https://github.com/fmtlib/fmt/issues/2406>`_,
-  `#2446 <https://github.com/fmtlib/fmt/pull/2446>`_,
-  `#2493 <https://github.com/fmtlib/fmt/issues/2493>`_,
-  `#2513 <https://github.com/fmtlib/fmt/issues/2513>`_,
-  `#2515 <https://github.com/fmtlib/fmt/pull/2515>`_,
-  `#2522 <https://github.com/fmtlib/fmt/issues/2522>`_,
-  `#2562 <https://github.com/fmtlib/fmt/pull/2562>`_,
-  `#2575 <https://github.com/fmtlib/fmt/pull/2575>`_,
-  `#2606 <https://github.com/fmtlib/fmt/pull/2606>`_,
-  `#2620 <https://github.com/fmtlib/fmt/pull/2620>`_,
-  `#2676 <https://github.com/fmtlib/fmt/issues/2676>`_).
-  Thanks `@sobolevn (Nikita Sobolev) <https://github.com/sobolevn>`_,
-  `@UnePierre (Max FERGER) <https://github.com/UnePierre>`_,
-  `@zhsj <https://github.com/zhsj>`_,
-  `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_,
-  `@ericcurtin (Eric Curtin) <https://github.com/ericcurtin>`_,
-  `@Lounarok <https://github.com/Lounarok>`_.
-
-* Improved fuzzers and added a fuzzer for chrono timepoint formatting
-  (`#2461 <https://github.com/fmtlib/fmt/pull/2461>`_,
-  `#2469 <https://github.com/fmtlib/fmt/pull/2469>`_).
-  `@pauldreik (Paul Dreik) <https://github.com/pauldreik>`_,
-
-* Added the ``FMT_SYSTEM_HEADERS`` CMake option setting which marks {fmt}'s
-  headers as system. It can be used to suppress warnings
-  (`#2644 <https://github.com/fmtlib/fmt/issues/2644>`_,
-  `#2651 <https://github.com/fmtlib/fmt/pull/2651>`_).
-  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
-
-* Added the Bazel build system support
-  (`#2505 <https://github.com/fmtlib/fmt/pull/2505>`_,
-  `#2516 <https://github.com/fmtlib/fmt/pull/2516>`_).
-  Thanks `@Vertexwahn <https://github.com/Vertexwahn>`_.
-
-* Improved build configuration and tests
-  (`#2437 <https://github.com/fmtlib/fmt/issues/2437>`_,
-  `#2558 <https://github.com/fmtlib/fmt/pull/2558>`_,
-  `#2648 <https://github.com/fmtlib/fmt/pull/2648>`_,
-  `#2650 <https://github.com/fmtlib/fmt/pull/2650>`_,
-  `#2663 <https://github.com/fmtlib/fmt/pull/2663>`_,
-  `#2677 <https://github.com/fmtlib/fmt/pull/2677>`_).
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
-  `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_,
-  `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
-
-* Fixed various warnings and compilation issues
-  (`#2353 <https://github.com/fmtlib/fmt/pull/2353>`_,
-  `#2356 <https://github.com/fmtlib/fmt/pull/2356>`_,
-  `#2399 <https://github.com/fmtlib/fmt/pull/2399>`_,
-  `#2408 <https://github.com/fmtlib/fmt/issues/2408>`_,
-  `#2414 <https://github.com/fmtlib/fmt/pull/2414>`_,
-  `#2427 <https://github.com/fmtlib/fmt/pull/2427>`_,
-  `#2432 <https://github.com/fmtlib/fmt/pull/2432>`_,
-  `#2442 <https://github.com/fmtlib/fmt/pull/2442>`_,
-  `#2434 <https://github.com/fmtlib/fmt/pull/2434>`_,
-  `#2439 <https://github.com/fmtlib/fmt/issues/2439>`_,
-  `#2447 <https://github.com/fmtlib/fmt/pull/2447>`_,
-  `#2450 <https://github.com/fmtlib/fmt/pull/2450>`_,
-  `#2455 <https://github.com/fmtlib/fmt/issues/2455>`_,
-  `#2465 <https://github.com/fmtlib/fmt/issues/2465>`_,
-  `#2472 <https://github.com/fmtlib/fmt/issues/2472>`_,
-  `#2474 <https://github.com/fmtlib/fmt/issues/2474>`_,
-  `#2476 <https://github.com/fmtlib/fmt/pull/2476>`_,
-  `#2478 <https://github.com/fmtlib/fmt/issues/2478>`_,
-  `#2479 <https://github.com/fmtlib/fmt/issues/2479>`_,
-  `#2481 <https://github.com/fmtlib/fmt/issues/2481>`_,
-  `#2482 <https://github.com/fmtlib/fmt/pull/2482>`_,
-  `#2483 <https://github.com/fmtlib/fmt/pull/2483>`_,
-  `#2490 <https://github.com/fmtlib/fmt/issues/2490>`_,
-  `#2491 <https://github.com/fmtlib/fmt/pull/2491>`_,
-  `#2510 <https://github.com/fmtlib/fmt/pull/2510>`_,
-  `#2518 <https://github.com/fmtlib/fmt/pull/2518>`_,
-  `#2528 <https://github.com/fmtlib/fmt/issues/2528>`_,
-  `#2529 <https://github.com/fmtlib/fmt/pull/2529>`_,
-  `#2539 <https://github.com/fmtlib/fmt/pull/2539>`_,
-  `#2540 <https://github.com/fmtlib/fmt/issues/2540>`_,
-  `#2545 <https://github.com/fmtlib/fmt/pull/2545>`_,
-  `#2555 <https://github.com/fmtlib/fmt/pull/2555>`_,
-  `#2557 <https://github.com/fmtlib/fmt/issues/2557>`_,
-  `#2570 <https://github.com/fmtlib/fmt/issues/2570>`_,
-  `#2573 <https://github.com/fmtlib/fmt/pull/2573>`_,
-  `#2582 <https://github.com/fmtlib/fmt/pull/2582>`_,
-  `#2605 <https://github.com/fmtlib/fmt/issues/2605>`_,
-  `#2611 <https://github.com/fmtlib/fmt/pull/2611>`_,
-  `#2647 <https://github.com/fmtlib/fmt/pull/2647>`_,
-  `#2627 <https://github.com/fmtlib/fmt/issues/2627>`_,
-  `#2630 <https://github.com/fmtlib/fmt/pull/2630>`_,
-  `#2635 <https://github.com/fmtlib/fmt/issues/2635>`_,
-  `#2638 <https://github.com/fmtlib/fmt/issues/2638>`_,
-  `#2653 <https://github.com/fmtlib/fmt/issues/2653>`_,
-  `#2654 <https://github.com/fmtlib/fmt/issues/2654>`_,
-  `#2661 <https://github.com/fmtlib/fmt/issues/2661>`_,
-  `#2664 <https://github.com/fmtlib/fmt/pull/2664>`_,
-  `#2684 <https://github.com/fmtlib/fmt/pull/2684>`_).
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
-  `@mwinterb <https://github.com/mwinterb>`_,
-  `@cdacamar (Cameron DaCamara) <https://github.com/cdacamar>`_,
-  `@TrebledJ (Johnathan) <https://github.com/TrebledJ>`_,
-  `@bodomartin (brm) <https://github.com/bodomartin>`_,
-  `@cquammen (Cory Quammen) <https://github.com/cquammen>`_,
-  `@white238 (Chris White) <https://github.com/white238>`_,
-  `@mmarkeloff (Max) <https://github.com/mmarkeloff>`_,
-  `@palacaze (Pierre-Antoine Lacaze) <https://github.com/palacaze>`_,
-  `@jcelerier (Jean-Michaël Celerier) <https://github.com/jcelerier>`_,
-  `@mborn-adi (Mathias Born) <https://github.com/mborn-adi>`_,
-  `@BrukerJWD (Jonathan W) <https://github.com/BrukerJWD>`_,
-  `@spyridon97 (Spiros Tsalikis) <https://github.com/spyridon97>`_,
-  `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_,
-  `@oliverlee (Oliver Lee) <https://github.com/oliverlee>`_,
-  `@joshessman-llnl (Josh Essman) <https://github.com/joshessman-llnl>`_,
-  `@akohlmey (Axel Kohlmeyer) <https://github.com/akohlmey>`_,
-  `@timkalu <https://github.com/timkalu>`_,
-  `@olupton (Olli Lupton) <https://github.com/olupton>`_,
-  `@Acretock <https://github.com/Acretock>`_,
-  `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_,
-  `@andrewcorrigan (Andrew Corrigan) <https://github.com/andrewcorrigan>`_,
-  `@lucpelletier <https://github.com/lucpelletier>`_,
-  `@HazardyKnusperkeks (Björn Schäpers) <https://github.com/HazardyKnusperkeks>`_.
-
-8.0.1 - 2021-07-02
-------------------
-
-* Fixed the version number in the inline namespace
-  (`#2374 <https://github.com/fmtlib/fmt/issues/2374>`_).
-
-* Added a missing presentation type check for ``std::string``
-  (`#2402 <https://github.com/fmtlib/fmt/issues/2402>`_).
-
-* Fixed a linkage error when mixing code built with clang and gcc
-  (`#2377 <https://github.com/fmtlib/fmt/issues/2377>`_).
-
-* Fixed documentation issues
-  (`#2396 <https://github.com/fmtlib/fmt/pull/2396>`_,
-  `#2403 <https://github.com/fmtlib/fmt/issues/2403>`_,
-  `#2406 <https://github.com/fmtlib/fmt/issues/2406>`_).
-  Thanks `@mkurdej (Marek Kurdej) <https://github.com/mkurdej>`_.
-
-* Removed dead code in FP formatter (
-  `#2398 <https://github.com/fmtlib/fmt/pull/2398>`_).
-  Thanks `@javierhonduco (Javier Honduvilla Coto)
-  <https://github.com/javierhonduco>`_.
-
-* Fixed various warnings and compilation issues
-  (`#2351 <https://github.com/fmtlib/fmt/issues/2351>`_,
-  `#2359 <https://github.com/fmtlib/fmt/issues/2359>`_,
-  `#2365 <https://github.com/fmtlib/fmt/pull/2365>`_,
-  `#2368 <https://github.com/fmtlib/fmt/issues/2368>`_,
-  `#2370 <https://github.com/fmtlib/fmt/pull/2370>`_,
-  `#2376 <https://github.com/fmtlib/fmt/pull/2376>`_,
-  `#2381 <https://github.com/fmtlib/fmt/pull/2381>`_,
-  `#2382 <https://github.com/fmtlib/fmt/pull/2382>`_,
-  `#2386 <https://github.com/fmtlib/fmt/issues/2386>`_,
-  `#2389 <https://github.com/fmtlib/fmt/pull/2389>`_,
-  `#2395 <https://github.com/fmtlib/fmt/pull/2395>`_,
-  `#2397 <https://github.com/fmtlib/fmt/pull/2397>`_,
-  `#2400 <https://github.com/fmtlib/fmt/issues/2400>`_,
-  `#2401 <https://github.com/fmtlib/fmt/issues/2401>`_,
-  `#2407 <https://github.com/fmtlib/fmt/pull/2407>`_).
-  Thanks `@zx2c4 (Jason A. Donenfeld) <https://github.com/zx2c4>`_,
-  `@AidanSun05 (Aidan Sun) <https://github.com/AidanSun05>`_,
-  `@mattiasljungstrom (Mattias Ljungström)
-  <https://github.com/mattiasljungstrom>`_,
-  `@joemmett (Jonathan Emmett) <https://github.com/joemmett>`_,
-  `@erengy (Eren Okka) <https://github.com/erengy>`_,
-  `@patlkli (Patrick Geltinger) <https://github.com/patlkli>`_,
-  `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
-  `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
-
-8.0.0 - 2021-06-21
-------------------
-
-* Enabled compile-time format string checks by default.
-  For example (`godbolt <https://godbolt.org/z/sMxcohGjz>`__):
-
-  .. code:: c++
-
-     #include <fmt/core.h>
-
-     int main() {
-       fmt::print("{:d}", "I am not a number");
-     }
-
-  gives a compile-time error on compilers with C++20 ``consteval`` support
-  (gcc 10+, clang 11+) because ``d`` is not a valid format specifier for a
-  string.
-
-  To pass a runtime string wrap it in ``fmt::runtime``:
-
-  .. code:: c++
-
-     fmt::print(fmt::runtime("{:d}"), "I am not a number");
-
-* Added compile-time formatting
-  (`#2019 <https://github.com/fmtlib/fmt/pull/2019>`_,
-  `#2044 <https://github.com/fmtlib/fmt/pull/2044>`_,
-  `#2056 <https://github.com/fmtlib/fmt/pull/2056>`_,
-  `#2072 <https://github.com/fmtlib/fmt/pull/2072>`_,
-  `#2075 <https://github.com/fmtlib/fmt/pull/2075>`_,
-  `#2078 <https://github.com/fmtlib/fmt/issues/2078>`_,
-  `#2129 <https://github.com/fmtlib/fmt/pull/2129>`_,
-  `#2326 <https://github.com/fmtlib/fmt/pull/2326>`_).
-  For example (`godbolt <https://godbolt.org/z/Mxx9d89jM>`__):
-
-  .. code:: c++
-
-     #include <fmt/compile.h>
-
-     consteval auto compile_time_itoa(int value) -> std::array<char, 10> {
-       auto result = std::array<char, 10>();
-       fmt::format_to(result.data(), FMT_COMPILE("{}"), value);
-       return result;
-     }
-
-     constexpr auto answer = compile_time_itoa(42);
-
-  Most of the formatting functionality is available at compile time with a
-  notable exception of floating-point numbers and pointers.
-  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
-
-* Optimized handling of format specifiers during format string compilation.
-  For example, hexadecimal formatting (``"{:x}"``) is now 3-7x faster than
-  before when using ``format_to`` with format string compilation and a
-  stack-allocated buffer (`#1944 <https://github.com/fmtlib/fmt/issues/1944>`_).
-
-  Before (7.1.3)::
-
-    ----------------------------------------------------------------------------
-    Benchmark                                  Time             CPU   Iterations
-    ----------------------------------------------------------------------------
-    FMTCompileOld/0                         15.5 ns         15.5 ns     43302898
-    FMTCompileOld/42                        16.6 ns         16.6 ns     43278267
-    FMTCompileOld/273123                    18.7 ns         18.6 ns     37035861
-    FMTCompileOld/9223372036854775807       19.4 ns         19.4 ns     35243000
-    ----------------------------------------------------------------------------
-
-  After (8.x)::
-
-    ----------------------------------------------------------------------------
-    Benchmark                                  Time             CPU   Iterations
-    ----------------------------------------------------------------------------
-    FMTCompileNew/0                         1.99 ns         1.99 ns    360523686
-    FMTCompileNew/42                        2.33 ns         2.33 ns    279865664
-    FMTCompileNew/273123                    3.72 ns         3.71 ns    190230315
-    FMTCompileNew/9223372036854775807       5.28 ns         5.26 ns    130711631
-    ----------------------------------------------------------------------------
-
-  It is even faster than ``std::to_chars`` from libc++ compiled with clang on
-  macOS::
-
-    ----------------------------------------------------------------------------
-    Benchmark                                  Time             CPU   Iterations
-    ----------------------------------------------------------------------------
-    ToChars/0                               4.42 ns         4.41 ns    160196630
-    ToChars/42                              5.00 ns         4.98 ns    140735201
-    ToChars/273123                          7.26 ns         7.24 ns     95784130
-    ToChars/9223372036854775807             8.77 ns         8.75 ns     75872534
-    ----------------------------------------------------------------------------
-
-  In other cases, especially involving ``std::string`` construction, the
-  speed up is usually lower because handling format specifiers takes a smaller
-  fraction of the total time.
-
-* Added the ``_cf`` user-defined literal to represent a compiled format string.
-  It can be used instead of the ``FMT_COMPILE`` macro
-  (`#2043 <https://github.com/fmtlib/fmt/pull/2043>`_,
-  `#2242 <https://github.com/fmtlib/fmt/pull/2242>`_):
-
-  .. code:: c++
-
-     #include <fmt/compile.h>
-
-     using namespace fmt::literals;
-     auto s = fmt::format(FMT_COMPILE("{}"), 42); // 🙁 not modern
-     auto s = fmt::format("{}"_cf, 42);           // 🙂 modern as hell
-
-  It requires compiler support for class types in non-type template parameters
-  (a C++20 feature) which is available in GCC 9.3+.
-  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
-
-* Format string compilation now requires ``format`` functions of ``formatter``
-  specializations for user-defined types to be ``const``:
-
-  .. code:: c++
-
-     template <> struct fmt::formatter<my_type>: formatter<string_view> {
-       template <typename FormatContext>
-       auto format(my_type obj, FormatContext& ctx) const {  // Note const here.
-         // ...
-       }
-     };
-
-* Added UDL-based named argument support to format string compilation
-  (`#2243 <https://github.com/fmtlib/fmt/pull/2243>`_,
-  `#2281 <https://github.com/fmtlib/fmt/pull/2281>`_). For example:
-
-  .. code:: c++
-
-     #include <fmt/compile.h>
-
-     using namespace fmt::literals;
-     auto s = fmt::format(FMT_COMPILE("{answer}"), "answer"_a = 42);
-
-  Here the argument named "answer" is resolved at compile time with no
-  runtime overhead.
-  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
-
-* Added format string compilation support to ``fmt::print``
-  (`#2280 <https://github.com/fmtlib/fmt/issues/2280>`_,
-  `#2304 <https://github.com/fmtlib/fmt/pull/2304>`_).
-  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
-
-* Added initial support for compiling {fmt} as a C++20 module
-  (`#2235 <https://github.com/fmtlib/fmt/pull/2235>`_,
-  `#2240 <https://github.com/fmtlib/fmt/pull/2240>`_,
-  `#2260 <https://github.com/fmtlib/fmt/pull/2260>`_,
-  `#2282 <https://github.com/fmtlib/fmt/pull/2282>`_,
-  `#2283 <https://github.com/fmtlib/fmt/pull/2283>`_,
-  `#2288 <https://github.com/fmtlib/fmt/pull/2288>`_,
-  `#2298 <https://github.com/fmtlib/fmt/pull/2298>`_,
-  `#2306 <https://github.com/fmtlib/fmt/pull/2306>`_,
-  `#2307 <https://github.com/fmtlib/fmt/pull/2307>`_,
-  `#2309 <https://github.com/fmtlib/fmt/pull/2309>`_,
-  `#2318 <https://github.com/fmtlib/fmt/pull/2318>`_,
-  `#2324 <https://github.com/fmtlib/fmt/pull/2324>`_,
-  `#2332 <https://github.com/fmtlib/fmt/pull/2332>`_,
-  `#2340 <https://github.com/fmtlib/fmt/pull/2340>`_).
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
-
-* Made symbols private by default reducing shared library size
-  (`#2301 <https://github.com/fmtlib/fmt/pull/2301>`_). For example there was
-  a ~15% reported reduction on one platform.
-  Thanks `@sergiud (Sergiu Deitsch) <https://github.com/sergiud>`_.
-
-* Optimized includes making the result of preprocessing ``fmt/format.h``
-  ~20% smaller with libstdc++/C++20 and slightly improving build times
-  (`#1998 <https://github.com/fmtlib/fmt/issues/1998>`_).
-
-* Added support of ranges with non-const ``begin`` / ``end``
-  (`#1953 <https://github.com/fmtlib/fmt/pull/1953>`_).
-  Thanks `@kitegi (sarah) <https://github.com/kitegi>`_.
-
-* Added support of ``std::byte`` and other formattable types to ``fmt::join``
-  (`#1981 <https://github.com/fmtlib/fmt/issues/1981>`_,
-  `#2040 <https://github.com/fmtlib/fmt/issues/2040>`_,
-  `#2050 <https://github.com/fmtlib/fmt/pull/2050>`_,
-  `#2262 <https://github.com/fmtlib/fmt/issues/2262>`_). For example:
-
-  .. code:: c++
-
-     #include <fmt/format.h>
-     #include <cstddef>
-     #include <vector>
-
-     int main() {
-       auto bytes = std::vector{std::byte(4), std::byte(2)};
-       fmt::print("{}", fmt::join(bytes, ""));
-     }
-
-  prints "42".
-
-  Thanks `@kamibo (Camille Bordignon) <https://github.com/kamibo>`_.
-
-* Implemented the default format for ``std::chrono::system_clock``
-  (`#2319 <https://github.com/fmtlib/fmt/issues/2319>`_,
-  `#2345 <https://github.com/fmtlib/fmt/pull/2345>`_). For example:
-
-  .. code:: c++
-
-     #include <fmt/chrono.h>
-
-     int main() {
-       fmt::print("{}", std::chrono::system_clock::now());
-     }
-
-  prints "2021-06-18 15:22:00" (the output depends on the current date and
-  time). Thanks `@sunmy2019 <https://github.com/sunmy2019>`_.
-
-* Made more chrono specifiers locale independent by default. Use the ``'L'``
-  specifier to get localized formatting. For example:
-
-  .. code:: c++
-
-     #include <fmt/chrono.h>
-
-     int main() {
-       std::locale::global(std::locale("ru_RU.UTF-8"));
-       auto monday = std::chrono::weekday(1);
-       fmt::print("{}\n", monday);   // prints "Mon"
-       fmt::print("{:L}\n", monday); // prints "пн"
-     }
-
-* Improved locale handling in chrono formatting
-  (`#2337 <https://github.com/fmtlib/fmt/issues/2337>`_,
-  `#2349 <https://github.com/fmtlib/fmt/pull/2349>`_,
-  `#2350 <https://github.com/fmtlib/fmt/pull/2350>`_).
-  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
-
-* Deprecated ``fmt/locale.h`` moving the formatting functions that take a
-  locale to ``fmt/format.h`` (``char``) and ``fmt/xchar`` (other overloads).
-  This doesn't introduce a dependency on ``<locale>`` so there is virtually no
-  compile time effect.
-
-* Deprecated an undocumented ``format_to`` overload that takes
-  ``basic_memory_buffer``.
-
-* Made parameter order in ``vformat_to`` consistent with ``format_to``
-  (`#2327 <https://github.com/fmtlib/fmt/issues/2327>`_).
-
-* Added support for time points with arbitrary durations
-  (`#2208 <https://github.com/fmtlib/fmt/issues/2208>`_). For example:
-
-  .. code:: c++
-
-     #include <fmt/chrono.h>
-
-     int main() {
-       using tp = std::chrono::time_point<
-         std::chrono::system_clock, std::chrono::seconds>;
-       fmt::print("{:%S}", tp(std::chrono::seconds(42)));
-     }
-
-  prints "42".
-
-* Formatting floating-point numbers no longer produces trailing zeros by default
-  for consistency with ``std::format``. For example:
-
-  .. code:: c++
-
-     #include <fmt/core.h>
-
-     int main() {
-       fmt::print("{0:.3}", 1.1);
-     }
-
-  prints "1.1". Use the ``'#'`` specifier to keep trailing zeros.
-
-* Dropped a limit on the number of elements in a range and replaced ``{}`` with
-  ``[]`` as range delimiters for consistency with Python's ``str.format``.
-
-* The ``'L'`` specifier for locale-specific numeric formatting can now be
-  combined with presentation specifiers as in ``std::format``. For example:
-
-  .. code:: c++
-
-     #include <fmt/core.h>
-     #include <locale>
-
-     int main() {
-       std::locale::global(std::locale("fr_FR.UTF-8"));
-       fmt::print("{0:.2Lf}", 0.42);
-     }
-
-  prints "0,42". The deprecated ``'n'`` specifier has been removed.
-
-* Made the ``0`` specifier ignored for infinity and NaN
-  (`#2305 <https://github.com/fmtlib/fmt/issues/2305>`_,
-  `#2310 <https://github.com/fmtlib/fmt/pull/2310>`_).
-  Thanks `@Liedtke (Matthias Liedtke) <https://github.com/Liedtke>`_.
-
-* Made the hexfloat formatting use the right alignment by default
-  (`#2308 <https://github.com/fmtlib/fmt/issues/2308>`_,
-  `#2317 <https://github.com/fmtlib/fmt/pull/2317>`_).
-  Thanks `@Liedtke (Matthias Liedtke) <https://github.com/Liedtke>`_.
-
-* Removed the deprecated numeric alignment (``'='``). Use the ``'0'`` specifier
-  instead.
-
-* Removed the deprecated ``fmt/posix.h`` header that has been replaced with
-  ``fmt/os.h``.
-
-* Removed the deprecated ``format_to_n_context``, ``format_to_n_args`` and
-  ``make_format_to_n_args``. They have been replaced with ``format_context``,
-  ``format_args` and ``make_format_args`` respectively.
-
-* Moved ``wchar_t``-specific functions and types to ``fmt/xchar.h``.
-  You can define ``FMT_DEPRECATED_INCLUDE_XCHAR`` to automatically include
-  ``fmt/xchar.h`` from ``fmt/format.h`` but this will be disabled in the next
-  major release.
-
-* Fixed handling of the ``'+'`` specifier in localized formatting
-  (`#2133 <https://github.com/fmtlib/fmt/issues/2133>`_).
-
-* Added support for the ``'s'`` format specifier that gives textual
-  representation of ``bool``
-  (`#2094 <https://github.com/fmtlib/fmt/issues/2094>`_,
-  `#2109 <https://github.com/fmtlib/fmt/pull/2109>`_). For example:
-
-  .. code:: c++
-
-     #include <fmt/core.h>
-
-     int main() {
-       fmt::print("{:s}", true);
-     }
-
-  prints "true".
-  Thanks `@powercoderlol (Ivan Polyakov) <https://github.com/powercoderlol>`_.
-
-* Made ``fmt::ptr`` work with function pointers
-  (`#2131 <https://github.com/fmtlib/fmt/pull/2131>`_). For example:
-
-  .. code:: c++
-
-     #include <fmt/format.h>
-
-     int main() {
-       fmt::print("My main: {}\n", fmt::ptr(main));
-     }
-
-  Thanks `@mikecrowe (Mike Crowe) <https://github.com/mikecrowe>`_.
-
-* The undocumented support for specializing ``formatter`` for pointer types
-  has been removed.
-
-* Fixed ``fmt::formatted_size`` with format string compilation
-  (`#2141 <https://github.com/fmtlib/fmt/pull/2141>`_,
-  `#2161 <https://github.com/fmtlib/fmt/pull/2161>`_).
-  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
-
-* Fixed handling of empty format strings during format string compilation
-  (`#2042 <https://github.com/fmtlib/fmt/issues/2042>`_):
-
-  .. code:: c++
-
-     auto s = fmt::format(FMT_COMPILE(""));
-
-  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
-
-* Fixed handling of enums in ``fmt::to_string``
-  (`#2036 <https://github.com/fmtlib/fmt/issues/2036>`_).
-
-* Improved width computation
-  (`#2033 <https://github.com/fmtlib/fmt/issues/2033>`_,
-  `#2091 <https://github.com/fmtlib/fmt/issues/2091>`_). For example:
-
-  .. code:: c++
-
-     #include <fmt/core.h>
-
-     int main() {
-       fmt::print("{:-<10}{}\n", "你好", "世界");
-       fmt::print("{:-<10}{}\n", "hello", "world");
-     }
-
-  prints
-
-  .. image:: https://user-images.githubusercontent.com/576385/
-             119840373-cea3ca80-beb9-11eb-91e0-54266c48e181.png
-
-  on a modern terminal.
-
-* The experimental fast output stream (``fmt::ostream``) is now truncated by
-  default for consistency with ``fopen``
-  (`#2018 <https://github.com/fmtlib/fmt/issues/2018>`_). For example:
-
-  .. code:: c++
-
-     #include <fmt/os.h>
-
-     int main() {
-       fmt::ostream out1 = fmt::output_file("guide");
-       out1.print("Zaphod");
-       out1.close();
-       fmt::ostream out2 = fmt::output_file("guide");
-       out2.print("Ford");
-     }
-
-  writes "Ford" to the file "guide". To preserve the old file content if any
-  pass ``fmt::file::WRONLY | fmt::file::CREATE`` flags to ``fmt::output_file``.
-
-* Fixed moving of ``fmt::ostream`` that holds buffered data
-  (`#2197 <https://github.com/fmtlib/fmt/issues/2197>`_,
-  `#2198 <https://github.com/fmtlib/fmt/pull/2198>`_).
-  Thanks `@vtta <https://github.com/vtta>`_.
-
-* Replaced the ``fmt::system_error`` exception with a function of the same
-  name that constructs ``std::system_error``
-  (`#2266 <https://github.com/fmtlib/fmt/issues/2266>`_).
-
-* Replaced the ``fmt::windows_error`` exception with a function of the same
-  name that constructs ``std::system_error`` with the category returned by
-  ``fmt::system_category()``
-  (`#2274 <https://github.com/fmtlib/fmt/issues/2274>`_,
-  `#2275 <https://github.com/fmtlib/fmt/pull/2275>`_).
-  The latter is similar to ``std::sytem_category`` but correctly handles UTF-8.
-  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
-
-* Replaced ``fmt::error_code`` with ``std::error_code`` and made it formattable
-  (`#2269 <https://github.com/fmtlib/fmt/issues/2269>`_,
-  `#2270 <https://github.com/fmtlib/fmt/pull/2270>`_,
-  `#2273 <https://github.com/fmtlib/fmt/pull/2273>`_).
-  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
- 
-* Added speech synthesis support
-  (`#2206 <https://github.com/fmtlib/fmt/pull/2206>`_).
-
-* Made ``format_to`` work with a memory buffer that has a custom allocator
-  (`#2300 <https://github.com/fmtlib/fmt/pull/2300>`_).
-  Thanks `@voxmea <https://github.com/voxmea>`_.
-
-* Added ``Allocator::max_size`` support to ``basic_memory_buffer``.
-  (`#1960 <https://github.com/fmtlib/fmt/pull/1960>`_).
-  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
-
-* Added wide string support to ``fmt::join``
-  (`#2236 <https://github.com/fmtlib/fmt/pull/2236>`_).
-  Thanks `@crbrz <https://github.com/crbrz>`_.
-
-* Made iterators passed to ``formatter`` specializations via a format context
-  satisfy C++20 ``std::output_iterator`` requirements
-  (`#2156 <https://github.com/fmtlib/fmt/issues/2156>`_,
-  `#2158 <https://github.com/fmtlib/fmt/pull/2158>`_,
-  `#2195 <https://github.com/fmtlib/fmt/issues/2195>`_,
-  `#2204 <https://github.com/fmtlib/fmt/pull/2204>`_).
-  Thanks `@randomnetcat (Jason Cobb) <https://github.com/randomnetcat>`_.
-
-* Optimized the ``printf`` implementation
-  (`#1982 <https://github.com/fmtlib/fmt/pull/1982>`_,
-  `#1984 <https://github.com/fmtlib/fmt/pull/1984>`_,
-  `#2016 <https://github.com/fmtlib/fmt/pull/2016>`_,
-  `#2164 <https://github.com/fmtlib/fmt/pull/2164>`_).
-  Thanks `@rimathia <https://github.com/rimathia>`_ and
-  `@moiwi <https://github.com/moiwi>`_.
-
-* Improved detection of ``constexpr`` ``char_traits``
-  (`#2246 <https://github.com/fmtlib/fmt/pull/2246>`_,
-  `#2257 <https://github.com/fmtlib/fmt/pull/2257>`_).
-  Thanks `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_.
-
-* Fixed writing to ``stdout`` when it is redirected to ``NUL`` on Windows
-  (`#2080 <https://github.com/fmtlib/fmt/issues/2080>`_).
-
-* Fixed exception propagation from iterators
-  (`#2097 <https://github.com/fmtlib/fmt/issues/2097>`_).
-  
-* Improved ``strftime`` error handling 
-  (`#2238 <https://github.com/fmtlib/fmt/issues/2238>`_,
-  `#2244 <https://github.com/fmtlib/fmt/pull/2244>`_).
-  Thanks `@yumeyao <https://github.com/yumeyao>`_.
-
-* Stopped using deprecated GCC UDL template extension.
-
-* Added ``fmt/args.h`` to the install target
-  (`#2096 <https://github.com/fmtlib/fmt/issues/2096>`_).
-
-* Error messages are now passed to assert when exceptions are disabled
-  (`#2145 <https://github.com/fmtlib/fmt/pull/2145>`_).
-  Thanks `@NobodyXu (Jiahao XU) <https://github.com/NobodyXu>`_.
-
-* Added the ``FMT_MASTER_PROJECT`` CMake option to control build and install
-  targets when {fmt} is included via ``add_subdirectory``
-  (`#2098 <https://github.com/fmtlib/fmt/issues/2098>`_,
-  `#2100 <https://github.com/fmtlib/fmt/pull/2100>`_).
-  Thanks `@randomizedthinking <https://github.com/randomizedthinking>`_.
-
-* Improved build configuration
-  (`#2026 <https://github.com/fmtlib/fmt/pull/2026>`_,
-  `#2122 <https://github.com/fmtlib/fmt/pull/2122>`_).
-  Thanks `@luncliff (Park DongHa) <https://github.com/luncliff>`_ and
-  `@ibaned (Dan Ibanez) <https://github.com/ibaned>`_.
-
-* Fixed various warnings and compilation issues
-  (`#1947 <https://github.com/fmtlib/fmt/issues/1947>`_,
-  `#1959 <https://github.com/fmtlib/fmt/pull/1959>`_,
-  `#1963 <https://github.com/fmtlib/fmt/pull/1963>`_,
-  `#1965 <https://github.com/fmtlib/fmt/pull/1965>`_,
-  `#1966 <https://github.com/fmtlib/fmt/issues/1966>`_,
-  `#1974 <https://github.com/fmtlib/fmt/pull/1974>`_,
-  `#1975 <https://github.com/fmtlib/fmt/pull/1975>`_,
-  `#1990 <https://github.com/fmtlib/fmt/pull/1990>`_,
-  `#2000 <https://github.com/fmtlib/fmt/issues/2000>`_,
-  `#2001 <https://github.com/fmtlib/fmt/pull/2001>`_,
-  `#2002 <https://github.com/fmtlib/fmt/issues/2002>`_,
-  `#2004 <https://github.com/fmtlib/fmt/issues/2004>`_,
-  `#2006 <https://github.com/fmtlib/fmt/pull/2006>`_,
-  `#2009 <https://github.com/fmtlib/fmt/pull/2009>`_,
-  `#2010 <https://github.com/fmtlib/fmt/pull/2010>`_,
-  `#2038 <https://github.com/fmtlib/fmt/issues/2038>`_,
-  `#2039 <https://github.com/fmtlib/fmt/issues/2039>`_,
-  `#2047 <https://github.com/fmtlib/fmt/issues/2047>`_,
-  `#2053 <https://github.com/fmtlib/fmt/pull/2053>`_,
-  `#2059 <https://github.com/fmtlib/fmt/issues/2059>`_,
-  `#2065 <https://github.com/fmtlib/fmt/pull/2065>`_,
-  `#2067 <https://github.com/fmtlib/fmt/pull/2067>`_,
-  `#2068 <https://github.com/fmtlib/fmt/pull/2068>`_,
-  `#2073 <https://github.com/fmtlib/fmt/pull/2073>`_,
-  `#2103 <https://github.com/fmtlib/fmt/issues/2103>`_,
-  `#2105 <https://github.com/fmtlib/fmt/issues/2105>`_,
-  `#2106 <https://github.com/fmtlib/fmt/pull/2106>`_,
-  `#2107 <https://github.com/fmtlib/fmt/pull/2107>`_,
-  `#2116 <https://github.com/fmtlib/fmt/issues/2116>`_,
-  `#2117 <https://github.com/fmtlib/fmt/pull/2117>`_,
-  `#2118 <https://github.com/fmtlib/fmt/issues/2118>`_,
-  `#2119 <https://github.com/fmtlib/fmt/pull/2119>`_,
-  `#2127 <https://github.com/fmtlib/fmt/issues/2127>`_,
-  `#2128 <https://github.com/fmtlib/fmt/pull/2128>`_,
-  `#2140 <https://github.com/fmtlib/fmt/issues/2140>`_,
-  `#2142 <https://github.com/fmtlib/fmt/issues/2142>`_,
-  `#2143 <https://github.com/fmtlib/fmt/pull/2143>`_,
-  `#2144 <https://github.com/fmtlib/fmt/pull/2144>`_,
-  `#2147 <https://github.com/fmtlib/fmt/issues/2147>`_,
-  `#2148 <https://github.com/fmtlib/fmt/issues/2148>`_,
-  `#2149 <https://github.com/fmtlib/fmt/issues/2149>`_,
-  `#2152 <https://github.com/fmtlib/fmt/pull/2152>`_,
-  `#2160 <https://github.com/fmtlib/fmt/pull/2160>`_,
-  `#2170 <https://github.com/fmtlib/fmt/issues/2170>`_,
-  `#2175 <https://github.com/fmtlib/fmt/issues/2175>`_,
-  `#2176 <https://github.com/fmtlib/fmt/issues/2176>`_,
-  `#2177 <https://github.com/fmtlib/fmt/pull/2177>`_,
-  `#2178 <https://github.com/fmtlib/fmt/issues/2178>`_,
-  `#2179 <https://github.com/fmtlib/fmt/pull/2179>`_,
-  `#2180 <https://github.com/fmtlib/fmt/issues/2180>`_,
-  `#2181 <https://github.com/fmtlib/fmt/issues/2181>`_,
-  `#2183 <https://github.com/fmtlib/fmt/pull/2183>`_,
-  `#2184 <https://github.com/fmtlib/fmt/issues/2184>`_,
-  `#2185 <https://github.com/fmtlib/fmt/issues/2185>`_,
-  `#2186 <https://github.com/fmtlib/fmt/pull/2186>`_,
-  `#2187 <https://github.com/fmtlib/fmt/pull/2187>`_,
-  `#2190 <https://github.com/fmtlib/fmt/pull/2190>`_,
-  `#2192 <https://github.com/fmtlib/fmt/pull/2192>`_,
-  `#2194 <https://github.com/fmtlib/fmt/pull/2194>`_,
-  `#2205 <https://github.com/fmtlib/fmt/pull/2205>`_,
-  `#2210 <https://github.com/fmtlib/fmt/issues/2210>`_,
-  `#2211 <https://github.com/fmtlib/fmt/pull/2211>`_,
-  `#2215 <https://github.com/fmtlib/fmt/pull/2215>`_,
-  `#2216 <https://github.com/fmtlib/fmt/pull/2216>`_,
-  `#2218 <https://github.com/fmtlib/fmt/pull/2218>`_,
-  `#2220 <https://github.com/fmtlib/fmt/pull/2220>`_,
-  `#2228 <https://github.com/fmtlib/fmt/issues/2228>`_,
-  `#2229 <https://github.com/fmtlib/fmt/pull/2229>`_,
-  `#2230 <https://github.com/fmtlib/fmt/pull/2230>`_,
-  `#2233 <https://github.com/fmtlib/fmt/issues/2233>`_,
-  `#2239 <https://github.com/fmtlib/fmt/pull/2239>`_,
-  `#2248 <https://github.com/fmtlib/fmt/issues/2248>`_,
-  `#2252 <https://github.com/fmtlib/fmt/issues/2252>`_,
-  `#2253 <https://github.com/fmtlib/fmt/pull/2253>`_,
-  `#2255 <https://github.com/fmtlib/fmt/pull/2255>`_,
-  `#2261 <https://github.com/fmtlib/fmt/issues/2261>`_,
-  `#2278 <https://github.com/fmtlib/fmt/issues/2278>`_,
-  `#2284 <https://github.com/fmtlib/fmt/issues/2284>`_,
-  `#2287 <https://github.com/fmtlib/fmt/pull/2287>`_,
-  `#2289 <https://github.com/fmtlib/fmt/pull/2289>`_,
-  `#2290 <https://github.com/fmtlib/fmt/pull/2290>`_,
-  `#2293 <https://github.com/fmtlib/fmt/pull/2293>`_,
-  `#2295 <https://github.com/fmtlib/fmt/issues/2295>`_,
-  `#2296 <https://github.com/fmtlib/fmt/pull/2296>`_,
-  `#2297 <https://github.com/fmtlib/fmt/pull/2297>`_,
-  `#2311 <https://github.com/fmtlib/fmt/issues/2311>`_,
-  `#2313 <https://github.com/fmtlib/fmt/pull/2313>`_,
-  `#2315 <https://github.com/fmtlib/fmt/pull/2315>`_,
-  `#2320 <https://github.com/fmtlib/fmt/issues/2320>`_,
-  `#2321 <https://github.com/fmtlib/fmt/pull/2321>`_,
-  `#2323 <https://github.com/fmtlib/fmt/pull/2323>`_,
-  `#2328 <https://github.com/fmtlib/fmt/issues/2328>`_,
-  `#2329 <https://github.com/fmtlib/fmt/pull/2329>`_,
-  `#2333 <https://github.com/fmtlib/fmt/pull/2333>`_,
-  `#2338 <https://github.com/fmtlib/fmt/pull/2338>`_,
-  `#2341 <https://github.com/fmtlib/fmt/pull/2341>`_).
-  Thanks `@darklukee <https://github.com/darklukee>`_,
-  `@fagg (Ashton Fagg) <https://github.com/fagg>`_,
-  `@killerbot242 (Lieven de Cock) <https://github.com/killerbot242>`_,
-  `@jgopel (Jonathan Gopel) <https://github.com/jgopel>`_,
-  `@yeswalrus (Walter Gray) <https://github.com/yeswalrus>`_,
-  `@Finkman <https://github.com/Finkman>`_,
-  `@HazardyKnusperkeks (Björn Schäpers) <https://github.com/HazardyKnusperkeks>`_,
-  `@dkavolis (Daumantas Kavolis) <https://github.com/dkavolis>`_,
-  `@concatime (Issam Maghni) <https://github.com/concatime>`_,
-  `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_,
-  `@summivox (Yin Zhong) <https://github.com/summivox>`_,
-  `@yNeo <https://github.com/yNeo>`_,
-  `@Apache-HB (Elliot) <https://github.com/Apache-HB>`_,
-  `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_,
-  `@toojays (John Steele Scott) <https://github.com/toojays>`_,
-  `@Brainy0207 <https://github.com/Brainy0207>`_,
-  `@vadz (VZ) <https://github.com/vadz>`_,
-  `@imsherlock (Ryan Sherlock) <https://github.com/imsherlock>`_,
-  `@phprus (Vladislav Shchapov) <https://github.com/phprus>`_,
-  `@white238 (Chris White) <https://github.com/white238>`_,
-  `@yafshar (Yaser Afshar) <https://github.com/yafshar>`_,
-  `@BillyDonahue (Billy Donahue) <https://github.com/BillyDonahue>`_,
-  `@jstaahl <https://github.com/jstaahl>`_,
-  `@denchat <https://github.com/denchat>`_,
-  `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
-  `@ilyakurdyukov (Ilya Kurdyukov) <https://github.com/ilyakurdyukov>`_,
-  `@ilmai <https://github.com/ilmai>`_,
-  `@JessyDL (Jessy De Lannoit) <https://github.com/JessyDL>`_,
-  `@sergiud (Sergiu Deitsch) <https://github.com/sergiud>`_,
-  `@mwinterb <https://github.com/mwinterb>`_,
-  `@sven-herrmann <https://github.com/sven-herrmann>`_,
-  `@jmelas (John Melas) <https://github.com/jmelas>`_,
-  `@twoixter (Jose Miguel Pérez) <https://github.com/twoixter>`_,
-  `@crbrz <https://github.com/crbrz>`_,
-  `@upsj (Tobias Ribizel) <https://github.com/upsj>`_.
-
-* Improved documentation
-  (`#1986 <https://github.com/fmtlib/fmt/issues/1986>`_,
-  `#2051 <https://github.com/fmtlib/fmt/pull/2051>`_,
-  `#2057 <https://github.com/fmtlib/fmt/issues/2057>`_,
-  `#2081 <https://github.com/fmtlib/fmt/pull/2081>`_,
-  `#2084 <https://github.com/fmtlib/fmt/issues/2084>`_,
-  `#2312 <https://github.com/fmtlib/fmt/pull/2312>`_).
-  Thanks `@imba-tjd (谭九鼎) <https://github.com/imba-tjd>`_,
-  `@0x416c69 (AlιAѕѕaѕѕιN) <https://github.com/0x416c69>`_,
-  `@mordante <https://github.com/mordante>`_.
-
-* Continuous integration and test improvements
-  (`#1969 <https://github.com/fmtlib/fmt/issues/1969>`_,
-  `#1991 <https://github.com/fmtlib/fmt/pull/1991>`_,
-  `#2020 <https://github.com/fmtlib/fmt/pull/2020>`_,
-  `#2110 <https://github.com/fmtlib/fmt/pull/2110>`_,
-  `#2114 <https://github.com/fmtlib/fmt/pull/2114>`_,
-  `#2196 <https://github.com/fmtlib/fmt/issues/2196>`_,
-  `#2217 <https://github.com/fmtlib/fmt/pull/2217>`_,
-  `#2247 <https://github.com/fmtlib/fmt/pull/2247>`_,
-  `#2256 <https://github.com/fmtlib/fmt/pull/2256>`_,
-  `#2336 <https://github.com/fmtlib/fmt/pull/2336>`_,
-  `#2346 <https://github.com/fmtlib/fmt/pull/2346>`_).
-  Thanks `@jgopel (Jonathan Gopel) <https://github.com/jgopel>`_,
-  `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_ and
-  `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
-  
-7.1.3 - 2020-11-24
-------------------
-
-* Fixed handling of buffer boundaries in ``format_to_n``
-  (`#1996 <https://github.com/fmtlib/fmt/issues/1996>`_,
-  `#2029 <https://github.com/fmtlib/fmt/issues/2029>`_).
-
-* Fixed linkage errors when linking with a shared library
-  (`#2011 <https://github.com/fmtlib/fmt/issues/2011>`_).
-
-* Reintroduced ostream support to range formatters
-  (`#2014 <https://github.com/fmtlib/fmt/issues/2014>`_).
-
-* Worked around an issue with mixing std versions in gcc
-  (`#2017 <https://github.com/fmtlib/fmt/issues/2017>`_).
-
-7.1.2 - 2020-11-04
-------------------
-
-* Fixed floating point formatting with large precision
-  (`#1976 <https://github.com/fmtlib/fmt/issues/1976>`_).
-
-7.1.1 - 2020-11-01
-------------------
-
-* Fixed ABI compatibility with 7.0.x
-  (`#1961 <https://github.com/fmtlib/fmt/issues/1961>`_).
-
-* Added the ``FMT_ARM_ABI_COMPATIBILITY`` macro to work around ABI
-  incompatibility between GCC and Clang on ARM
-  (`#1919 <https://github.com/fmtlib/fmt/issues/1919>`_).
-
-* Worked around a SFINAE bug in GCC 8
-  (`#1957 <https://github.com/fmtlib/fmt/issues/1957>`_).
-
-* Fixed linkage errors when building with GCC's LTO
-  (`#1955 <https://github.com/fmtlib/fmt/issues/1955>`_).
-
-* Fixed a compilation error when building without ``__builtin_clz`` or equivalent
-  (`#1968 <https://github.com/fmtlib/fmt/pull/1968>`_).
-  Thanks `@tohammer (Tobias Hammer) <https://github.com/tohammer>`_.
-
-* Fixed a sign conversion warning
-  (`#1964 <https://github.com/fmtlib/fmt/pull/1964>`_).
-  Thanks `@OptoCloud <https://github.com/OptoCloud>`_.
-
-7.1.0 - 2020-10-25
-------------------
-
-* Switched from `Grisu3
-  <https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf>`_
-  to `Dragonbox <https://github.com/jk-jeon/dragonbox>`_ for the default
-  floating-point formatting which gives the shortest decimal representation
-  with round-trip guarantee and correct rounding
-  (`#1882 <https://github.com/fmtlib/fmt/pull/1882>`_,
-  `#1887 <https://github.com/fmtlib/fmt/pull/1887>`_,
-  `#1894 <https://github.com/fmtlib/fmt/pull/1894>`_). This makes {fmt} up to
-  20-30x faster than common implementations of ``std::ostringstream`` and
-  ``sprintf`` on `dtoa-benchmark <https://github.com/fmtlib/dtoa-benchmark>`_
-  and faster than double-conversion and Ryū:
-
-  .. image:: https://user-images.githubusercontent.com/576385/
-             95684665-11719600-0ba8-11eb-8e5b-972ff4e49428.png
-
-  It is possible to get even better performance at the cost of larger binary
-  size by compiling with the ``FMT_USE_FULL_CACHE_DRAGONBOX`` macro set to 1.
-
-  Thanks `@jk-jeon (Junekey Jeon) <https://github.com/jk-jeon>`_.
-
-* Added an experimental unsynchronized file output API which, together with
-  `format string compilation <https://fmt.dev/latest/api.html#compile-api>`_,
-  can give `5-9 times speed up compared to fprintf
-  <https://www.zverovich.net/2020/08/04/optimal-file-buffer-size.html>`_
-  on common platforms (`godbolt <https://godbolt.org/z/nsTcG8>`__):
-
-  .. code:: c++
-
-     #include <fmt/os.h>
-
-     int main() {
-       auto f = fmt::output_file("guide");
-       f.print("The answer is {}.", 42);
-     }
-
-* Added a formatter for ``std::chrono::time_point<system_clock>``
-  (`#1819 <https://github.com/fmtlib/fmt/issues/1819>`_,
-  `#1837 <https://github.com/fmtlib/fmt/pull/1837>`_). For example
-  (`godbolt <https://godbolt.org/z/c4M6fh>`__):
-
-  .. code:: c++
-
-     #include <fmt/chrono.h>
-
-     int main() {
-       auto now = std::chrono::system_clock::now();
-       fmt::print("The time is {:%H:%M:%S}.\n", now);
-     }
-
-  Thanks `@adamburgess (Adam Burgess) <https://github.com/adamburgess>`_.
-
-* Added support for ranges with non-const ``begin``/``end`` to ``fmt::join``
-  (`#1784 <https://github.com/fmtlib/fmt/issues/1784>`_,
-  `#1786 <https://github.com/fmtlib/fmt/pull/1786>`_). For example
-  (`godbolt <https://godbolt.org/z/jP63Tv>`__):
-
-  .. code:: c++
-
-     #include <fmt/ranges.h>
-     #include <range/v3/view/filter.hpp>
-
-     int main() {
-       using std::literals::string_literals::operator""s;
-       auto strs = std::array{"a"s, "bb"s, "ccc"s};
-       auto range = strs | ranges::views::filter(
-         [] (const std::string &x) { return x.size() != 2; }
-       );
-       fmt::print("{}\n", fmt::join(range, ""));
-     }
-
-  prints "accc".
-
-  Thanks `@tonyelewis (Tony E Lewis) <https://github.com/tonyelewis>`_.
-
-* Added a ``memory_buffer::append`` overload that takes a range
-  (`#1806 <https://github.com/fmtlib/fmt/pull/1806>`_).
-  Thanks `@BRevzin (Barry Revzin) <https://github.com/BRevzin>`_.
-
-* Improved handling of single code units in ``FMT_COMPILE``. For example:
-
-  .. code:: c++
-
-     #include <fmt/compile.h>
-
-     char* f(char* buf) {
-       return fmt::format_to(buf, FMT_COMPILE("x{}"), 42);
-     }
-
-  compiles to just (`godbolt <https://godbolt.org/z/5vncz3>`__):
-
-  .. code:: asm
-
-     _Z1fPc:
-       movb $120, (%rdi)
-       xorl %edx, %edx
-       cmpl $42, _ZN3fmt2v76detail10basic_dataIvE23zero_or_powers_of_10_32E+8(%rip)
-       movl $3, %eax
-       seta %dl
-       subl %edx, %eax
-       movzwl _ZN3fmt2v76detail10basic_dataIvE6digitsE+84(%rip), %edx
-       cltq
-       addq %rdi, %rax
-       movw %dx, -2(%rax)
-       ret
-
-  Here a single ``mov`` instruction writes ``'x'`` (``$120``) to the output
-  buffer.
-
-* Added dynamic width support to format string compilation
-  (`#1809 <https://github.com/fmtlib/fmt/issues/1809>`_).
-
-* Improved error reporting for unformattable types: now you'll get the type name
-  directly in the error message instead of the note:
-
-  .. code:: c++
-
-     #include <fmt/core.h>
-
-     struct how_about_no {};
-
-     int main() {
-       fmt::print("{}", how_about_no());
-     }
-
-  Error (`godbolt <https://godbolt.org/z/GoxM4e>`__):
-
-  ``fmt/core.h:1438:3: error: static_assert failed due to requirement
-  'fmt::v7::formattable<how_about_no>()' "Cannot format an argument.
-  To make type T formattable provide a formatter<T> specialization:
-  https://fmt.dev/latest/api.html#udt"
-  ...``
-
-* Added the `make_args_checked <https://fmt.dev/7.1.0/api.html#argument-lists>`_
-  function template that allows you to write formatting functions with
-  compile-time format string checks and avoid binary code bloat
-  (`godbolt <https://godbolt.org/z/PEf9qr>`__):
-
-  .. code:: c++
-
-     void vlog(const char* file, int line, fmt::string_view format,
-               fmt::format_args args) {
-       fmt::print("{}: {}: ", file, line);
-       fmt::vprint(format, args);
-     }
-
-     template <typename S, typename... Args>
-     void log(const char* file, int line, const S& format, Args&&... args) {
-       vlog(file, line, format,
-           fmt::make_args_checked<Args...>(format, args...));
-     }
-
-     #define MY_LOG(format, ...) \
-       log(__FILE__, __LINE__, FMT_STRING(format), __VA_ARGS__)
-
-     MY_LOG("invalid squishiness: {}", 42);
-
-* Replaced ``snprintf`` fallback with a faster internal IEEE 754 ``float`` and
-  ``double`` formatter for arbitrary precision. For example
-  (`godbolt <https://godbolt.org/z/dPhWvj>`__):
-
-  .. code:: c++
-
-     #include <fmt/core.h>
-
-     int main() {
-       fmt::print("{:.500}\n", 4.9406564584124654E-324);
-     }
-
-  prints
-
-  ``4.9406564584124654417656879286822137236505980261432476442558568250067550727020875186529983636163599237979656469544571773092665671035593979639877479601078187812630071319031140452784581716784898210368871863605699873072305000638740915356498438731247339727316961514003171538539807412623856559117102665855668676818703956031062493194527159149245532930545654440112748012970999954193198940908041656332452475714786901472678015935523861155013480352649347201937902681071074917033322268447533357208324319360923829e-324``.
-
-* Made ``format_to_n`` and ``formatted_size`` part of the `core API
-  <https://fmt.dev/latest/api.html#core-api>`__
-  (`godbolt <https://godbolt.org/z/sPjY1K>`__):
-
-  .. code:: c++
-
-     #include <fmt/core.h>
-
-     int main() {
-       char buffer[10];
-       auto result = fmt::format_to_n(buffer, sizeof(buffer), "{}", 42);
-     }
-
-* Added ``fmt::format_to_n`` overload with format string compilation
-  (`#1764 <https://github.com/fmtlib/fmt/issues/1764>`_,
-  `#1767 <https://github.com/fmtlib/fmt/pull/1767>`_,
-  `#1869 <https://github.com/fmtlib/fmt/pull/1869>`_). For example
-  (`godbolt <https://godbolt.org/z/93h86q>`__):
-
-  .. code:: c++
-
-     #include <fmt/compile.h>
-
-     int main() {
-       char buffer[8];
-       fmt::format_to_n(buffer, sizeof(buffer), FMT_COMPILE("{}"), 42);
-     }
-
-  Thanks `@Kurkin (Dmitry Kurkin) <https://github.com/Kurkin>`_,
-  `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
-
-* Added ``fmt::format_to`` overload that take ``text_style``
-  (`#1593 <https://github.com/fmtlib/fmt/issues/1593>`_,
-  `#1842 <https://github.com/fmtlib/fmt/issues/1842>`_,
-  `#1843 <https://github.com/fmtlib/fmt/pull/1843>`_). For example
-  (`godbolt <https://godbolt.org/z/91153r>`__):
-
-  .. code:: c++
-
-     #include <fmt/color.h>
-
-     int main() {
-       std::string out;
-       fmt::format_to(std::back_inserter(out),
-                      fmt::emphasis::bold | fg(fmt::color::red),
-                      "The answer is {}.", 42);
-     }
-
-  Thanks `@Naios (Denis Blank) <https://github.com/Naios>`_.
-
-* Made the ``'#'`` specifier emit trailing zeros in addition to the decimal
-  point (`#1797 <https://github.com/fmtlib/fmt/issues/1797>`_). For example
-  (`godbolt <https://godbolt.org/z/bhdcW9>`__):
-
-  .. code:: c++
-
-     #include <fmt/core.h>
-
-     int main() {
-       fmt::print("{:#.2g}", 0.5);
-     }
-
-  prints ``0.50``.
-
-* Changed the default floating point format to not include ``.0`` for
-  consistency with ``std::format`` and ``std::to_chars``
-  (`#1893 <https://github.com/fmtlib/fmt/issues/1893>`_,
-  `#1943 <https://github.com/fmtlib/fmt/issues/1943>`_). It is possible to get
-  the decimal point and trailing zero with the ``#`` specifier.
-
-* Fixed an issue with floating-point formatting that could result in addition of
-  a non-significant trailing zero in rare cases e.g. ``1.00e-34`` instead of
-  ``1.0e-34`` (`#1873 <https://github.com/fmtlib/fmt/issues/1873>`_,
-  `#1917 <https://github.com/fmtlib/fmt/issues/1917>`_).
-
-* Made ``fmt::to_string`` fallback on ``ostream`` insertion operator if
-  the ``formatter`` specialization is not provided
-  (`#1815 <https://github.com/fmtlib/fmt/issues/1815>`_,
-  `#1829 <https://github.com/fmtlib/fmt/pull/1829>`_).
-  Thanks `@alexezeder (Alexey Ochapov) <https://github.com/alexezeder>`_.
-
-* Added support for the append mode to the experimental file API and
-  improved ``fcntl.h`` detection.
-  (`#1847 <https://github.com/fmtlib/fmt/pull/1847>`_,
-  `#1848 <https://github.com/fmtlib/fmt/pull/1848>`_).
-  Thanks `@t-wiser <https://github.com/t-wiser>`_.
-
-* Fixed handling of types that have both an implicit conversion operator and
-  an overloaded ``ostream`` insertion operator
-  (`#1766 <https://github.com/fmtlib/fmt/issues/1766>`_).
-
-* Fixed a slicing issue in an internal iterator type
-  (`#1822 <https://github.com/fmtlib/fmt/pull/1822>`_).
-  Thanks `@BRevzin (Barry Revzin) <https://github.com/BRevzin>`_.
-
-* Fixed an issue in locale-specific integer formatting
-  (`#1927 <https://github.com/fmtlib/fmt/issues/1927>`_).
-
-* Fixed handling of exotic code unit types
-  (`#1870 <https://github.com/fmtlib/fmt/issues/1870>`_,
-  `#1932 <https://github.com/fmtlib/fmt/issues/1932>`_).
-
-* Improved ``FMT_ALWAYS_INLINE``
-  (`#1878 <https://github.com/fmtlib/fmt/pull/1878>`_).
-  Thanks `@jk-jeon (Junekey Jeon) <https://github.com/jk-jeon>`_.
-
-* Removed dependency on ``windows.h``
-  (`#1900 <https://github.com/fmtlib/fmt/pull/1900>`_).
-  Thanks `@bernd5 (Bernd Baumanns) <https://github.com/bernd5>`_.
-
-* Optimized counting of decimal digits on MSVC
-  (`#1890 <https://github.com/fmtlib/fmt/pull/1890>`_).
-  Thanks `@mwinterb <https://github.com/mwinterb>`_.
-
-* Improved documentation
-  (`#1772 <https://github.com/fmtlib/fmt/issues/1772>`_,
-  `#1775 <https://github.com/fmtlib/fmt/pull/1775>`_,
-  `#1792 <https://github.com/fmtlib/fmt/pull/1792>`_,
-  `#1838 <https://github.com/fmtlib/fmt/pull/1838>`_,
-  `#1888 <https://github.com/fmtlib/fmt/pull/1888>`_,
-  `#1918 <https://github.com/fmtlib/fmt/pull/1918>`_,
-  `#1939 <https://github.com/fmtlib/fmt/pull/1939>`_).
-  Thanks `@leolchat (Léonard Gérard) <https://github.com/leolchat>`_,
-  `@pepsiman (Malcolm Parsons) <https://github.com/pepsiman>`_,
-  `@Klaim (Joël Lamotte) <https://github.com/Klaim>`_,
-  `@ravijanjam (Ravi J) <https://github.com/ravijanjam>`_,
-  `@francesco-st <https://github.com/francesco-st>`_,
-  `@udnaan (Adnan) <https://github.com/udnaan>`_.
-
-* Added the ``FMT_REDUCE_INT_INSTANTIATIONS`` CMake option that reduces the
-  binary code size at the cost of some integer formatting performance. This can
-  be useful for extremely memory-constrained embedded systems
-  (`#1778 <https://github.com/fmtlib/fmt/issues/1778>`_,
-  `#1781 <https://github.com/fmtlib/fmt/pull/1781>`_).
-  Thanks `@kammce (Khalil Estell) <https://github.com/kammce>`_.
-
-* Added the ``FMT_USE_INLINE_NAMESPACES`` macro to control usage of inline
-  namespaces (`#1945 <https://github.com/fmtlib/fmt/pull/1945>`_).
-  Thanks `@darklukee <https://github.com/darklukee>`_.
-
-* Improved build configuration
-  (`#1760 <https://github.com/fmtlib/fmt/pull/1760>`_,
-  `#1770 <https://github.com/fmtlib/fmt/pull/1770>`_,
-  `#1779 <https://github.com/fmtlib/fmt/issues/1779>`_,
-  `#1783 <https://github.com/fmtlib/fmt/pull/1783>`_,
-  `#1823 <https://github.com/fmtlib/fmt/pull/1823>`_).
-  Thanks `@dvetutnev (Dmitriy Vetutnev) <https://github.com/dvetutnev>`_,
-  `@xvitaly (Vitaly Zaitsev) <https://github.com/xvitaly>`_,
-  `@tambry (Raul Tambre) <https://github.com/tambry>`_,
-  `@medithe <https://github.com/medithe>`_,
-  `@martinwuehrer (Martin Wührer) <https://github.com/martinwuehrer>`_.
-
-* Fixed various warnings and compilation issues
-  (`#1790 <https://github.com/fmtlib/fmt/pull/1790>`_,
-  `#1802 <https://github.com/fmtlib/fmt/pull/1802>`_,
-  `#1808 <https://github.com/fmtlib/fmt/pull/1808>`_,
-  `#1810 <https://github.com/fmtlib/fmt/issues/1810>`_,
-  `#1811 <https://github.com/fmtlib/fmt/issues/1811>`_,
-  `#1812 <https://github.com/fmtlib/fmt/pull/1812>`_,
-  `#1814 <https://github.com/fmtlib/fmt/pull/1814>`_,
-  `#1816 <https://github.com/fmtlib/fmt/pull/1816>`_,
-  `#1817 <https://github.com/fmtlib/fmt/pull/1817>`_,
-  `#1818 <https://github.com/fmtlib/fmt/pull/1818>`_,
-  `#1825 <https://github.com/fmtlib/fmt/issues/1825>`_,
-  `#1836 <https://github.com/fmtlib/fmt/pull/1836>`_,
-  `#1855 <https://github.com/fmtlib/fmt/pull/1855>`_,
-  `#1856 <https://github.com/fmtlib/fmt/pull/1856>`_,
-  `#1860 <https://github.com/fmtlib/fmt/pull/1860>`_,
-  `#1877 <https://github.com/fmtlib/fmt/pull/1877>`_,
-  `#1879 <https://github.com/fmtlib/fmt/pull/1879>`_,
-  `#1880 <https://github.com/fmtlib/fmt/pull/1880>`_,
-  `#1896 <https://github.com/fmtlib/fmt/issues/1896>`_,
-  `#1897 <https://github.com/fmtlib/fmt/pull/1897>`_,
-  `#1898 <https://github.com/fmtlib/fmt/pull/1898>`_,
-  `#1904 <https://github.com/fmtlib/fmt/issues/1904>`_,
-  `#1908 <https://github.com/fmtlib/fmt/pull/1908>`_,
-  `#1911 <https://github.com/fmtlib/fmt/issues/1911>`_,
-  `#1912 <https://github.com/fmtlib/fmt/issues/1912>`_,
-  `#1928 <https://github.com/fmtlib/fmt/issues/1928>`_,
-  `#1929 <https://github.com/fmtlib/fmt/pull/1929>`_,
-  `#1935 <https://github.com/fmtlib/fmt/issues/1935>`_,
-  `#1937 <https://github.com/fmtlib/fmt/pull/1937>`_,
-  `#1942 <https://github.com/fmtlib/fmt/pull/1942>`_,
-  `#1949 <https://github.com/fmtlib/fmt/issues/1949>`_).
-  Thanks `@TheQwertiest <https://github.com/TheQwertiest>`_,
-  `@medithe <https://github.com/medithe>`_,
-  `@martinwuehrer (Martin Wührer) <https://github.com/martinwuehrer>`_,
-  `@n16h7hunt3r <https://github.com/n16h7hunt3r>`_,
-  `@Othereum (Seokjin Lee) <https://github.com/Othereum>`_,
-  `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
-  `@AlexanderLanin (Alexander Lanin) <https://github.com/AlexanderLanin>`_,
-  `@gcerretani (Giovanni Cerretani) <https://github.com/gcerretani>`_,
-  `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_,
-  `@noizefloor (Jan Schwers) <https://github.com/noizefloor>`_,
-  `@akohlmey (Axel Kohlmeyer) <https://github.com/akohlmey>`_,
-  `@jk-jeon (Junekey Jeon) <https://github.com/jk-jeon>`_,
-  `@rimathia <https://github.com/rimathia>`_,
-  `@rglarix (Riccardo Ghetta (larix)) <https://github.com/rglarix>`_,
-  `@moiwi <https://github.com/moiwi>`_,
-  `@heckad (Kazantcev Andrey) <https://github.com/heckad>`_,
-  `@MarcDirven <https://github.com/MarcDirven>`_.
-  `@BartSiwek (Bart Siwek) <https://github.com/BartSiwek>`_,
-  `@darklukee <https://github.com/darklukee>`_.
-
-7.0.3 - 2020-08-06
-------------------
-
-* Worked around broken ``numeric_limits`` for 128-bit integers
-  (`#1787 <https://github.com/fmtlib/fmt/issues/1787>`_).
-
-* Added error reporting on missing named arguments
-  (`#1796 <https://github.com/fmtlib/fmt/issues/1796>`_).
-
-* Stopped using 128-bit integers with clang-cl
-  (`#1800 <https://github.com/fmtlib/fmt/pull/1800>`_).
-  Thanks `@Kingcom <https://github.com/Kingcom>`_.
-
-* Fixed issues in locale-specific integer formatting
-  (`#1782 <https://github.com/fmtlib/fmt/issues/1782>`_,
-  `#1801 <https://github.com/fmtlib/fmt/issues/1801>`_).
-
-7.0.2 - 2020-07-29
-------------------
-
-* Worked around broken ``numeric_limits`` for 128-bit integers
-  (`#1725 <https://github.com/fmtlib/fmt/issues/1725>`_).
-
-* Fixed compatibility with CMake 3.4
-  (`#1779 <https://github.com/fmtlib/fmt/issues/1779>`_).
-
-* Fixed handling of digit separators in locale-specific formatting
-  (`#1782 <https://github.com/fmtlib/fmt/issues/1782>`_).
-
-7.0.1 - 2020-07-07
-------------------
-
-* Updated the inline version namespace name.
-
-* Worked around a gcc bug in mangling of alias templates
-  (`#1753 <https://github.com/fmtlib/fmt/issues/1753>`_).
-
-* Fixed a linkage error on Windows
-  (`#1757 <https://github.com/fmtlib/fmt/issues/1757>`_).
-  Thanks `@Kurkin (Dmitry Kurkin) <https://github.com/Kurkin>`_.
-
-* Fixed minor issues with the documentation.
-
-7.0.0 - 2020-07-05
-------------------
-
-* Reduced the library size. For example, on macOS a stripped test binary
-  statically linked with {fmt} `shrank from ~368k to less than 100k
-  <http://www.zverovich.net/2020/05/21/reducing-library-size.html>`_.
-
-* Added a simpler and more efficient `format string compilation API
-  <https://fmt.dev/7.0.0/api.html#compile-api>`_:
-
-  .. code:: c++
-
-     #include <fmt/compile.h>
-
-     // Converts 42 into std::string using the most efficient method and no
-     // runtime format string processing.
-     std::string s = fmt::format(FMT_COMPILE("{}"), 42);
-
-  The old ``fmt::compile`` API is now deprecated.
-
-* Optimized integer formatting: ``format_to`` with format string compilation
-  and a stack-allocated buffer is now `faster than to_chars on both
-  libc++ and libstdc++
-  <http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html>`_.
-
-* Optimized handling of small format strings. For example,
-
-  .. code:: c++
-
-      fmt::format("Result: {}: ({},{},{},{})", str1, str2, str3, str4, str5)
-
-  is now ~40% faster (`#1685 <https://github.com/fmtlib/fmt/issues/1685>`_).
-
-* Applied extern templates to improve compile times when using the core API
-  and ``fmt/format.h`` (`#1452 <https://github.com/fmtlib/fmt/issues/1452>`_).
-  For example, on macOS with clang the compile time of a test translation unit
-  dropped from 2.3s to 0.3s with ``-O2`` and from 0.6s to 0.3s with the default
-  settings (``-O0``).
-
-  Before (``-O2``)::
-
-    % time c++ -c test.cc -I include -std=c++17 -O2
-    c++ -c test.cc -I include -std=c++17 -O2  2.22s user 0.08s system 99% cpu 2.311 total
-
-  After (``-O2``)::
-
-    % time c++ -c test.cc -I include -std=c++17 -O2
-    c++ -c test.cc -I include -std=c++17 -O2  0.26s user 0.04s system 98% cpu 0.303 total
-
-  Before (default)::
-
-    % time c++ -c test.cc -I include -std=c++17
-    c++ -c test.cc -I include -std=c++17  0.53s user 0.06s system 98% cpu 0.601 total
-
-  After (default)::
-
-    % time c++ -c test.cc -I include -std=c++17
-    c++ -c test.cc -I include -std=c++17  0.24s user 0.06s system 98% cpu 0.301 total
-
-  It is still recommended to use ``fmt/core.h`` instead of ``fmt/format.h`` but
-  the compile time difference is now smaller. Thanks
-  `@alex3d <https://github.com/alex3d>`_ for the suggestion.
-
-* Named arguments are now stored on stack (no dynamic memory allocations) and
-  the compiled code is more compact and efficient. For example
-
-  .. code:: c++
-
-     #include <fmt/core.h>
-
-     int main() {
-       fmt::print("The answer is {answer}\n", fmt::arg("answer", 42));
-     }
-
-  compiles to just (`godbolt <https://godbolt.org/z/NcfEp_>`__)
-
-  .. code:: asm
-
-      .LC0:
-              .string "answer"
-      .LC1:
-              .string "The answer is {answer}\n"
-      main:
-              sub     rsp, 56
-              mov     edi, OFFSET FLAT:.LC1
-              mov     esi, 23
-              movabs  rdx, 4611686018427387905
-              lea     rax, [rsp+32]
-              lea     rcx, [rsp+16]
-              mov     QWORD PTR [rsp+8], 1
-              mov     QWORD PTR [rsp], rax
-              mov     DWORD PTR [rsp+16], 42
-              mov     QWORD PTR [rsp+32], OFFSET FLAT:.LC0
-              mov     DWORD PTR [rsp+40], 0
-              call    fmt::v6::vprint(fmt::v6::basic_string_view<char>,
-                                      fmt::v6::format_args)
-              xor     eax, eax
-              add     rsp, 56
-              ret
-
-          .L.str.1:
-                  .asciz  "answer"
-
-* Implemented compile-time checks for dynamic width and precision
-  (`#1614 <https://github.com/fmtlib/fmt/issues/1614>`_):
-
-  .. code:: c++
-
-     #include <fmt/format.h>
-
-     int main() {
-       fmt::print(FMT_STRING("{0:{1}}"), 42);
-     }
-
-  now gives a compilation error because argument 1 doesn't exist::
-
-    In file included from test.cc:1:
-    include/fmt/format.h:2726:27: error: constexpr variable 'invalid_format' must be
-    initialized by a constant expression
-      FMT_CONSTEXPR_DECL bool invalid_format =
-                              ^
-    ...
-    include/fmt/core.h:569:26: note: in call to
-    '&checker(s, {}).context_->on_error(&"argument not found"[0])'
-        if (id >= num_args_) on_error("argument not found");
-                            ^
-
-* Added sentinel support to ``fmt::join``
-  (`#1689 <https://github.com/fmtlib/fmt/pull/1689>`_)
-
-  .. code:: c++
-
-    struct zstring_sentinel {};
-    bool operator==(const char* p, zstring_sentinel) { return *p == '\0'; }
-    bool operator!=(const char* p, zstring_sentinel) { return *p != '\0'; }
-
-    struct zstring {
-      const char* p;
-      const char* begin() const { return p; }
-      zstring_sentinel end() const { return {}; }
-    };
-
-    auto s = fmt::format("{}", fmt::join(zstring{"hello"}, "_"));
-    // s == "h_e_l_l_o"
-
-  Thanks `@BRevzin (Barry Revzin) <https://github.com/BRevzin>`_.
-
-* Added support for named arguments, ``clear`` and ``reserve`` to
-  ``dynamic_format_arg_store``
-  (`#1655 <https://github.com/fmtlib/fmt/issues/1655>`_,
-  `#1663 <https://github.com/fmtlib/fmt/pull/1663>`_,
-  `#1674 <https://github.com/fmtlib/fmt/pull/1674>`_,
-  `#1677 <https://github.com/fmtlib/fmt/pull/1677>`_).
-  Thanks `@vsolontsov-ll (Vladimir Solontsov)
-  <https://github.com/vsolontsov-ll>`_.
-
-* Added support for the ``'c'`` format specifier to integral types for
-  compatibility with ``std::format``
-  (`#1652 <https://github.com/fmtlib/fmt/issues/1652>`_).
-
-* Replaced the ``'n'`` format specifier with ``'L'`` for compatibility with
-  ``std::format`` (`#1624 <https://github.com/fmtlib/fmt/issues/1624>`_).
-  The ``'n'`` specifier can be enabled via the ``FMT_DEPRECATED_N_SPECIFIER``
-  macro.
-
-* The ``'='`` format specifier is now disabled by default for compatibility with
-  ``std::format``. It can be enabled via the ``FMT_DEPRECATED_NUMERIC_ALIGN``
-  macro.
-
-* Removed the following deprecated APIs:
-
-  * ``FMT_STRING_ALIAS`` and ``fmt`` macros - replaced by ``FMT_STRING``
-  * ``fmt::basic_string_view::char_type`` - replaced by
-    ``fmt::basic_string_view::value_type``
-  * ``convert_to_int``
-  * ``format_arg_store::types``
-  * ``*parse_context`` - replaced by ``*format_parse_context``
-  * ``FMT_DEPRECATED_INCLUDE_OS``
-  * ``FMT_DEPRECATED_PERCENT`` - incompatible with ``std::format``
-  * ``*writer`` - replaced by compiled format API
-
-* Renamed the ``internal`` namespace to ``detail``
-  (`#1538 <https://github.com/fmtlib/fmt/issues/1538>`_). The former is still
-  provided as an alias if the ``FMT_USE_INTERNAL`` macro is defined.
-
-* Improved compatibility between ``fmt::printf`` with the standard specs
-  (`#1595 <https://github.com/fmtlib/fmt/issues/1595>`_,
-  `#1682 <https://github.com/fmtlib/fmt/pull/1682>`_,
-  `#1683 <https://github.com/fmtlib/fmt/pull/1683>`_,
-  `#1687 <https://github.com/fmtlib/fmt/pull/1687>`_,
-  `#1699 <https://github.com/fmtlib/fmt/pull/1699>`_).
-  Thanks `@rimathia <https://github.com/rimathia>`_.
-
-* Fixed handling of ``operator<<`` overloads that use ``copyfmt``
-  (`#1666 <https://github.com/fmtlib/fmt/issues/1666>`_).
-
-* Added the ``FMT_OS`` CMake option to control inclusion of OS-specific APIs
-  in the fmt target. This can be useful for embedded platforms
-  (`#1654 <https://github.com/fmtlib/fmt/issues/1654>`_,
-  `#1656 <https://github.com/fmtlib/fmt/pull/1656>`_).
-  Thanks `@kwesolowski (Krzysztof Wesolowski)
-  <https://github.com/kwesolowski>`_.
-
-* Replaced ``FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION`` with the ``FMT_FUZZ``
-  macro to prevent interferring with fuzzing of projects using {fmt}
-  (`#1650 <https://github.com/fmtlib/fmt/pull/1650>`_).
-  Thanks `@asraa (Asra Ali) <https://github.com/asraa>`_.
-
-* Fixed compatibility with emscripten
-  (`#1636 <https://github.com/fmtlib/fmt/issues/1636>`_,
-  `#1637 <https://github.com/fmtlib/fmt/pull/1637>`_).
-  Thanks `@ArthurSonzogni (Arthur Sonzogni)
-  <https://github.com/ArthurSonzogni>`_.
-
-* Improved documentation
-  (`#704 <https://github.com/fmtlib/fmt/issues/704>`_,
-  `#1643 <https://github.com/fmtlib/fmt/pull/1643>`_,
-  `#1660 <https://github.com/fmtlib/fmt/pull/1660>`_,
-  `#1681 <https://github.com/fmtlib/fmt/pull/1681>`_,
-  `#1691 <https://github.com/fmtlib/fmt/pull/1691>`_,
-  `#1706 <https://github.com/fmtlib/fmt/pull/1706>`_,
-  `#1714 <https://github.com/fmtlib/fmt/pull/1714>`_,
-  `#1721 <https://github.com/fmtlib/fmt/pull/1721>`_,
-  `#1739 <https://github.com/fmtlib/fmt/pull/1739>`_,
-  `#1740 <https://github.com/fmtlib/fmt/pull/1740>`_,
-  `#1741 <https://github.com/fmtlib/fmt/pull/1741>`_,
-  `#1751 <https://github.com/fmtlib/fmt/pull/1751>`_).
-  Thanks `@senior7515 (Alexander Gallego) <https://github.com/senior7515>`_,
-  `@lsr0 (Lindsay Roberts) <https://github.com/lsr0>`_,
-  `@puetzk (Kevin Puetz) <https://github.com/puetzk>`_,
-  `@fpelliccioni (Fernando Pelliccioni) <https://github.com/fpelliccioni>`_,
-  Alexey Kuzmenko, `@jelly (jelle van der Waa) <https://github.com/jelly>`_,
-  `@claremacrae (Clare Macrae) <https://github.com/claremacrae>`_,
-  `@jiapengwen (文佳鹏) <https://github.com/jiapengwen>`_,
-  `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
-  `@alexey-milovidov <https://github.com/alexey-milovidov>`_.
-
-* Implemented various build configuration fixes and improvements
-  (`#1603 <https://github.com/fmtlib/fmt/pull/1603>`_,
-  `#1657 <https://github.com/fmtlib/fmt/pull/1657>`_,
-  `#1702 <https://github.com/fmtlib/fmt/pull/1702>`_,
-  `#1728 <https://github.com/fmtlib/fmt/pull/1728>`_).
-  Thanks `@scramsby (Scott Ramsby) <https://github.com/scramsby>`_,
-  `@jtojnar (Jan Tojnar) <https://github.com/jtojnar>`_,
-  `@orivej (Orivej Desh) <https://github.com/orivej>`_,
-  `@flagarde <https://github.com/flagarde>`_.
-
-* Fixed various warnings and compilation issues
-  (`#1616 <https://github.com/fmtlib/fmt/pull/1616>`_,
-  `#1620 <https://github.com/fmtlib/fmt/issues/1620>`_,
-  `#1622 <https://github.com/fmtlib/fmt/issues/1622>`_,
-  `#1625 <https://github.com/fmtlib/fmt/issues/1625>`_,
-  `#1627 <https://github.com/fmtlib/fmt/pull/1627>`_,
-  `#1628 <https://github.com/fmtlib/fmt/issues/1628>`_,
-  `#1629 <https://github.com/fmtlib/fmt/pull/1629>`_,
-  `#1631 <https://github.com/fmtlib/fmt/issues/1631>`_,
-  `#1633 <https://github.com/fmtlib/fmt/pull/1633>`_,
-  `#1649 <https://github.com/fmtlib/fmt/pull/1649>`_,
-  `#1658 <https://github.com/fmtlib/fmt/issues/1658>`_,
-  `#1661 <https://github.com/fmtlib/fmt/pull/1661>`_,
-  `#1667 <https://github.com/fmtlib/fmt/pull/1667>`_,
-  `#1668 <https://github.com/fmtlib/fmt/issues/1668>`_,
-  `#1669 <https://github.com/fmtlib/fmt/pull/1669>`_,
-  `#1692 <https://github.com/fmtlib/fmt/issues/1692>`_,
-  `#1696 <https://github.com/fmtlib/fmt/pull/1696>`_,
-  `#1697 <https://github.com/fmtlib/fmt/pull/1697>`_,
-  `#1707 <https://github.com/fmtlib/fmt/issues/1707>`_,
-  `#1712 <https://github.com/fmtlib/fmt/pull/1712>`_,
-  `#1716 <https://github.com/fmtlib/fmt/pull/1716>`_,
-  `#1722 <https://github.com/fmtlib/fmt/pull/1722>`_,
-  `#1724 <https://github.com/fmtlib/fmt/issues/1724>`_,
-  `#1729 <https://github.com/fmtlib/fmt/pull/1729>`_,
-  `#1738 <https://github.com/fmtlib/fmt/pull/1738>`_,
-  `#1742 <https://github.com/fmtlib/fmt/issues/1742>`_,
-  `#1743 <https://github.com/fmtlib/fmt/issues/1743>`_,
-  `#1744 <https://github.com/fmtlib/fmt/pull/1744>`_,
-  `#1747 <https://github.com/fmtlib/fmt/issues/1747>`_,
-  `#1750 <https://github.com/fmtlib/fmt/pull/1750>`_).
-  Thanks `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
-  `@gabime (Gabi Melman) <https://github.com/gabime>`_,
-  `@johnor (Johan) <https://github.com/johnor>`_,
-  `@Kurkin (Dmitry Kurkin) <https://github.com/Kurkin>`_,
-  `@invexed (James Beach) <https://github.com/invexed>`_,
-  `@peterbell10 <https://github.com/peterbell10>`_,
-  `@daixtrose (Markus Werle) <https://github.com/daixtrose>`_,
-  `@petrutlucian94 (Lucian Petrut) <https://github.com/petrutlucian94>`_,
-  `@Neargye (Daniil Goncharov) <https://github.com/Neargye>`_,
-  `@ambitslix (Attila M. Szilagyi) <https://github.com/ambitslix>`_,
-  `@gabime (Gabi Melman) <https://github.com/gabime>`_,
-  `@erthink (Leonid Yuriev) <https://github.com/erthink>`_,
-  `@tohammer (Tobias Hammer) <https://github.com/tohammer>`_,
-  `@0x8000-0000 (Florin Iucha) <https://github.com/0x8000-0000>`_.
-
-6.2.1 - 2020-05-09
-------------------
-
-* Fixed ostream support in ``sprintf``
-  (`#1631 <https://github.com/fmtlib/fmt/issues/1631>`_).
-
-* Fixed type detection when using implicit conversion to ``string_view`` and
-  ostream ``operator<<`` inconsistently
-  (`#1662 <https://github.com/fmtlib/fmt/issues/1662>`_).
-
-6.2.0 - 2020-04-05
-------------------
-
-* Improved error reporting when trying to format an object of a non-formattable
-  type:
-
-  .. code:: c++
-
-     fmt::format("{}", S());
-
-  now gives::
-
-    include/fmt/core.h:1015:5: error: static_assert failed due to requirement
-    'formattable' "Cannot format argument. To make type T formattable provide a
-    formatter<T> specialization:
-    https://fmt.dev/latest/api.html#formatting-user-defined-types"
-        static_assert(
-        ^
-    ...
-    note: in instantiation of function template specialization
-    'fmt::v6::format<char [3], S, char>' requested here
-      fmt::format("{}", S());
-           ^
-
-  if ``S`` is not formattable.
-
-* Reduced the library size by ~10%.
-
-* Always print decimal point if ``#`` is specified
-  (`#1476 <https://github.com/fmtlib/fmt/issues/1476>`_,
-  `#1498 <https://github.com/fmtlib/fmt/issues/1498>`_):
-
-  .. code:: c++
-
-     fmt::print("{:#.0f}", 42.0);
-
-  now prints ``42.``
-
-* Implemented the ``'L'`` specifier for locale-specific numeric formatting to
-  improve compatibility with ``std::format``. The ``'n'`` specifier is now
-  deprecated and will be removed in the next major release.
-
-* Moved OS-specific APIs such as ``windows_error`` from ``fmt/format.h`` to
-  ``fmt/os.h``. You can define ``FMT_DEPRECATED_INCLUDE_OS`` to automatically
-  include ``fmt/os.h`` from ``fmt/format.h`` for compatibility but this will be
-  disabled in the next major release.
-
-* Added precision overflow detection in floating-point formatting.
-
-* Implemented detection of invalid use of ``fmt::arg``.
-
-* Used ``type_identity`` to block unnecessary template argument deduction.
-  Thanks Tim Song.
-
-* Improved UTF-8 handling
-  (`#1109 <https://github.com/fmtlib/fmt/issues/1109>`_):
-
-  .. code:: c++
-
-     fmt::print("┌{0:─^{2}}┐\n"
-                "│{1: ^{2}}│\n"
-                "└{0:─^{2}}┘\n", "", "Привет, мир!", 20);
-
-  now prints::
-
-     ┌────────────────────┐
-     │    Привет, мир!    │
-     └────────────────────┘
-
-  on systems that support Unicode.
-
-* Added experimental dynamic argument storage
-  (`#1170 <https://github.com/fmtlib/fmt/issues/1170>`_,
-  `#1584 <https://github.com/fmtlib/fmt/pull/1584>`_):
-
-  .. code:: c++
-
-     fmt::dynamic_format_arg_store<fmt::format_context> store;
-     store.push_back("answer");
-     store.push_back(42);
-     fmt::vprint("The {} is {}.\n", store);
-  
-  prints::
-
-     The answer is 42.
-
-  Thanks `@vsolontsov-ll (Vladimir Solontsov)
-  <https://github.com/vsolontsov-ll>`_.
-
-* Made ``fmt::join`` accept ``initializer_list``
-  (`#1591 <https://github.com/fmtlib/fmt/pull/1591>`_).
-  Thanks `@Rapotkinnik (Nikolay Rapotkin) <https://github.com/Rapotkinnik>`_.
-
-* Fixed handling of empty tuples
-  (`#1588 <https://github.com/fmtlib/fmt/issues/1588>`_).
-
-* Fixed handling of output iterators in ``format_to_n``
-  (`#1506 <https://github.com/fmtlib/fmt/issues/1506>`_).
-
-* Fixed formatting of ``std::chrono::duration`` types to wide output
-  (`#1533 <https://github.com/fmtlib/fmt/pull/1533>`_).
-  Thanks `@zeffy (pilao) <https://github.com/zeffy>`_.
-
-* Added const ``begin`` and ``end`` overload to buffers
-  (`#1553 <https://github.com/fmtlib/fmt/pull/1553>`_).
-  Thanks `@dominicpoeschko <https://github.com/dominicpoeschko>`_.
-
-* Added the ability to disable floating-point formatting via ``FMT_USE_FLOAT``,
-  ``FMT_USE_DOUBLE`` and ``FMT_USE_LONG_DOUBLE`` macros for extremely
-  memory-constrained embedded system
-  (`#1590 <https://github.com/fmtlib/fmt/pull/1590>`_).
-  Thanks `@albaguirre (Alberto Aguirre) <https://github.com/albaguirre>`_.
-
-* Made ``FMT_STRING`` work with ``constexpr`` ``string_view``
-  (`#1589 <https://github.com/fmtlib/fmt/pull/1589>`_).
-  Thanks `@scramsby (Scott Ramsby) <https://github.com/scramsby>`_.
-
-* Implemented a minor optimization in the format string parser
-  (`#1560 <https://github.com/fmtlib/fmt/pull/1560>`_).
-  Thanks `@IkarusDeveloper <https://github.com/IkarusDeveloper>`_.
-
-* Improved attribute detection
-  (`#1469 <https://github.com/fmtlib/fmt/pull/1469>`_,
-  `#1475 <https://github.com/fmtlib/fmt/pull/1475>`_,
-  `#1576 <https://github.com/fmtlib/fmt/pull/1576>`_).
-  Thanks `@federico-busato (Federico) <https://github.com/federico-busato>`_,
-  `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_,
-  `@refnum <https://github.com/refnum>`_.
-
-* Improved documentation
-  (`#1481 <https://github.com/fmtlib/fmt/pull/1481>`_,
-  `#1523 <https://github.com/fmtlib/fmt/pull/1523>`_).
-  Thanks `@JackBoosY (Jack·Boos·Yu) <https://github.com/JackBoosY>`_,
-  `@imba-tjd (谭九鼎) <https://github.com/imba-tjd>`_.
-
-* Fixed symbol visibility on Linux when compiling with ``-fvisibility=hidden``
-  (`#1535 <https://github.com/fmtlib/fmt/pull/1535>`_).
-  Thanks `@milianw (Milian Wolff) <https://github.com/milianw>`_.
-
-* Implemented various build configuration fixes and improvements
-  (`#1264 <https://github.com/fmtlib/fmt/issues/1264>`_,
-  `#1460 <https://github.com/fmtlib/fmt/issues/1460>`_,
-  `#1534 <https://github.com/fmtlib/fmt/pull/1534>`_,
-  `#1536 <https://github.com/fmtlib/fmt/issues/1536>`_,
-  `#1545 <https://github.com/fmtlib/fmt/issues/1545>`_,
-  `#1546 <https://github.com/fmtlib/fmt/pull/1546>`_,
-  `#1566 <https://github.com/fmtlib/fmt/issues/1566>`_,
-  `#1582 <https://github.com/fmtlib/fmt/pull/1582>`_,
-  `#1597 <https://github.com/fmtlib/fmt/issues/1597>`_,
-  `#1598 <https://github.com/fmtlib/fmt/pull/1598>`_).
-  Thanks `@ambitslix (Attila M. Szilagyi) <https://github.com/ambitslix>`_,
-  `@jwillikers (Jordan Williams) <https://github.com/jwillikers>`_,
-  `@stac47 (Laurent Stacul) <https://github.com/stac47>`_.
-
-* Fixed various warnings and compilation issues
-  (`#1433 <https://github.com/fmtlib/fmt/pull/1433>`_,
-  `#1461 <https://github.com/fmtlib/fmt/issues/1461>`_,
-  `#1470 <https://github.com/fmtlib/fmt/pull/1470>`_,
-  `#1480 <https://github.com/fmtlib/fmt/pull/1480>`_,
-  `#1485 <https://github.com/fmtlib/fmt/pull/1485>`_,
-  `#1492 <https://github.com/fmtlib/fmt/pull/1492>`_,
-  `#1493 <https://github.com/fmtlib/fmt/issues/1493>`_,
-  `#1504 <https://github.com/fmtlib/fmt/issues/1504>`_,
-  `#1505 <https://github.com/fmtlib/fmt/pull/1505>`_,
-  `#1512 <https://github.com/fmtlib/fmt/pull/1512>`_,
-  `#1515 <https://github.com/fmtlib/fmt/issues/1515>`_,
-  `#1516 <https://github.com/fmtlib/fmt/pull/1516>`_,
-  `#1518 <https://github.com/fmtlib/fmt/pull/1518>`_,
-  `#1519 <https://github.com/fmtlib/fmt/pull/1519>`_,
-  `#1520 <https://github.com/fmtlib/fmt/pull/1520>`_,
-  `#1521 <https://github.com/fmtlib/fmt/pull/1521>`_,
-  `#1522 <https://github.com/fmtlib/fmt/pull/1522>`_,
-  `#1524 <https://github.com/fmtlib/fmt/issues/1524>`_,
-  `#1530 <https://github.com/fmtlib/fmt/pull/1530>`_,
-  `#1531 <https://github.com/fmtlib/fmt/issues/1531>`_,
-  `#1532 <https://github.com/fmtlib/fmt/pull/1532>`_,
-  `#1539 <https://github.com/fmtlib/fmt/issues/1539>`_,
-  `#1547 <https://github.com/fmtlib/fmt/issues/1547>`_,
-  `#1548 <https://github.com/fmtlib/fmt/issues/1548>`_,
-  `#1554 <https://github.com/fmtlib/fmt/pull/1554>`_,
-  `#1567 <https://github.com/fmtlib/fmt/issues/1567>`_,
-  `#1568 <https://github.com/fmtlib/fmt/pull/1568>`_,
-  `#1569 <https://github.com/fmtlib/fmt/pull/1569>`_,
-  `#1571 <https://github.com/fmtlib/fmt/pull/1571>`_,
-  `#1573 <https://github.com/fmtlib/fmt/pull/1573>`_,
-  `#1575 <https://github.com/fmtlib/fmt/pull/1575>`_,
-  `#1581 <https://github.com/fmtlib/fmt/pull/1581>`_,
-  `#1583 <https://github.com/fmtlib/fmt/issues/1583>`_,
-  `#1586 <https://github.com/fmtlib/fmt/issues/1586>`_,
-  `#1587 <https://github.com/fmtlib/fmt/issues/1587>`_,
-  `#1594 <https://github.com/fmtlib/fmt/issues/1594>`_,
-  `#1596 <https://github.com/fmtlib/fmt/pull/1596>`_,
-  `#1604 <https://github.com/fmtlib/fmt/issues/1604>`_,
-  `#1606 <https://github.com/fmtlib/fmt/pull/1606>`_,
-  `#1607 <https://github.com/fmtlib/fmt/issues/1607>`_,
-  `#1609 <https://github.com/fmtlib/fmt/issues/1609>`_).
-  Thanks `@marti4d (Chris Martin) <https://github.com/marti4d>`_,
-  `@iPherian <https://github.com/iPherian>`_,
-  `@parkertomatoes <https://github.com/parkertomatoes>`_,
-  `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
-  `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_,
-  `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
-  `@torsten48 <https://github.com/torsten48>`_,
-  `@tohammer (Tobias Hammer) <https://github.com/tohammer>`_,
-  `@lefticus (Jason Turner) <https://github.com/lefticus>`_,
-  `@ryusakki (Haise) <https://github.com/ryusakki>`_,
-  `@adnsv (Alex Denisov) <https://github.com/adnsv>`_,
-  `@fghzxm <https://github.com/fghzxm>`_,
-  `@refnum <https://github.com/refnum>`_,
-  `@pramodk (Pramod Kumbhar) <https://github.com/pramodk>`_,
-  `@Spirrwell <https://github.com/Spirrwell>`_,
-  `@scramsby (Scott Ramsby) <https://github.com/scramsby>`_.
-
-6.1.2 - 2019-12-11
-------------------
-
-* Fixed ABI compatibility with ``libfmt.so.6.0.0``
-  (`#1471 <https://github.com/fmtlib/fmt/issues/1471>`_).
-
-* Fixed handling types convertible to ``std::string_view``
-  (`#1451 <https://github.com/fmtlib/fmt/pull/1451>`_).
-  Thanks `@denizevrenci (Deniz Evrenci) <https://github.com/denizevrenci>`_.
-
-* Made CUDA test an opt-in enabled via the ``FMT_CUDA_TEST`` CMake option.
-
-* Fixed sign conversion warnings
-  (`#1440 <https://github.com/fmtlib/fmt/pull/1440>`_).
-  Thanks `@0x8000-0000 (Florin Iucha) <https://github.com/0x8000-0000>`_.
-
-6.1.1 - 2019-12-04
-------------------
-
-* Fixed shared library build on Windows
-  (`#1443 <https://github.com/fmtlib/fmt/pull/1443>`_,
-  `#1445 <https://github.com/fmtlib/fmt/issues/1445>`_,
-  `#1446 <https://github.com/fmtlib/fmt/pull/1446>`_,
-  `#1450 <https://github.com/fmtlib/fmt/issues/1450>`_).
-  Thanks `@egorpugin (Egor Pugin) <https://github.com/egorpugin>`_,
-  `@bbolli (Beat Bolli) <https://github.com/bbolli>`_.
-
-* Added a missing decimal point in exponent notation with trailing zeros.
-
-* Removed deprecated ``format_arg_store::TYPES``.
-
-6.1.0 - 2019-12-01
-------------------
-
-* {fmt} now formats IEEE 754 ``float`` and ``double`` using the shortest decimal
-  representation with correct rounding by default:
-
-  .. code:: c++
-
-     #include <cmath>
-     #include <fmt/core.h>
-
-     int main() {
-       fmt::print("{}", M_PI);
-     }
-
-  prints ``3.141592653589793``.
-
-* Made the fast binary to decimal floating-point formatter the default,
-  simplified it and improved performance. {fmt} is now 15 times faster than
-  libc++'s ``std::ostringstream``, 11 times faster than ``printf`` and 10%
-  faster than double-conversion on `dtoa-benchmark
-  <https://github.com/fmtlib/dtoa-benchmark>`_:
-
-  ==================  =========  =======
-  Function            Time (ns)  Speedup
-  ==================  =========  =======
-  ostringstream        1,346.30    1.00x
-  ostrstream           1,195.74    1.13x
-  sprintf                995.08    1.35x
-  doubleconv              99.10   13.59x
-  fmt                     88.34   15.24x
-  ==================  =========  =======
-
-  .. image:: https://user-images.githubusercontent.com/576385/
-             69767160-cdaca400-112f-11ea-9fc5-347c9f83caad.png
-
-* {fmt} no longer converts ``float`` arguments to ``double``. In particular this
-  improves the default (shortest) representation of floats and makes
-  ``fmt::format`` consistent with ``std::format`` specs
-  (`#1336 <https://github.com/fmtlib/fmt/issues/1336>`_,
-  `#1353 <https://github.com/fmtlib/fmt/issues/1353>`_,
-  `#1360 <https://github.com/fmtlib/fmt/pull/1360>`_,
-  `#1361 <https://github.com/fmtlib/fmt/pull/1361>`_):
-
-  .. code:: c++
-
-     fmt::print("{}", 0.1f);
-
-  prints ``0.1`` instead of ``0.10000000149011612``.
-
-  Thanks `@orivej (Orivej Desh) <https://github.com/orivej>`_.
-
-* Made floating-point formatting output consistent with ``printf``/iostreams
-  (`#1376 <https://github.com/fmtlib/fmt/issues/1376>`_,
-  `#1417 <https://github.com/fmtlib/fmt/issues/1417>`_).
-
-* Added support for 128-bit integers
-  (`#1287 <https://github.com/fmtlib/fmt/pull/1287>`_):
-
-  .. code:: c++
-
-     fmt::print("{}", std::numeric_limits<__int128_t>::max());
-
-  prints ``170141183460469231731687303715884105727``.
-
-  Thanks `@denizevrenci (Deniz Evrenci) <https://github.com/denizevrenci>`_.
-
-* The overload of ``print`` that takes ``text_style`` is now atomic, i.e. the
-  output from different threads doesn't interleave
-  (`#1351 <https://github.com/fmtlib/fmt/pull/1351>`_).
-  Thanks `@tankiJong (Tanki Zhang) <https://github.com/tankiJong>`_.
-
-* Made compile time in the header-only mode ~20% faster by reducing the number
-  of template instantiations. ``wchar_t`` overload of ``vprint`` was moved from
-  ``fmt/core.h`` to ``fmt/format.h``.
-
-* Added an overload of ``fmt::join`` that works with tuples
-  (`#1322 <https://github.com/fmtlib/fmt/issues/1322>`_,
-  `#1330 <https://github.com/fmtlib/fmt/pull/1330>`_):
-
-  .. code:: c++
-
-     #include <tuple>
-     #include <fmt/ranges.h>
-
-     int main() {
-       std::tuple<char, int, float> t{'a', 1, 2.0f};
-       fmt::print("{}", t);
-     }
-
-  prints ``('a', 1, 2.0)``.
-
-  Thanks `@jeremyong (Jeremy Ong) <https://github.com/jeremyong>`_.
-
-* Changed formatting of octal zero with prefix from "00" to "0":
-
-  .. code:: c++
-
-     fmt::print("{:#o}", 0);
-
-  prints ``0``.
-
-* The locale is now passed to ostream insertion (``<<``) operators
-  (`#1406 <https://github.com/fmtlib/fmt/pull/1406>`_):
-
-  .. code:: c++
-
-     #include <fmt/locale.h>
-     #include <fmt/ostream.h>
-
-     struct S {
-       double value;
-     };
-
-     std::ostream& operator<<(std::ostream& os, S s) {
-       return os << s.value;
-     }
-
-     int main() {
-       auto s = fmt::format(std::locale("fr_FR.UTF-8"), "{}", S{0.42});
-       // s == "0,42"
-     }
-
-  Thanks `@dlaugt (Daniel Laügt) <https://github.com/dlaugt>`_.
-
-* Locale-specific number formatting now uses grouping
-  (`#1393 <https://github.com/fmtlib/fmt/issues/1393>`_
-  `#1394 <https://github.com/fmtlib/fmt/pull/1394>`_).
-  Thanks `@skrdaniel <https://github.com/skrdaniel>`_.
-
-* Fixed handling of types with deleted implicit rvalue conversion to
-  ``const char**`` (`#1421 <https://github.com/fmtlib/fmt/issues/1421>`_):
-
-  .. code:: c++
-
-     struct mystring {
-       operator const char*() const&;
-       operator const char*() &;
-       operator const char*() const&& = delete;
-       operator const char*() && = delete;
-     };
-     mystring str;
-     fmt::print("{}", str); // now compiles
-
-* Enums are now mapped to correct underlying types instead of ``int``
-  (`#1286 <https://github.com/fmtlib/fmt/pull/1286>`_).
-  Thanks `@agmt (Egor Seredin) <https://github.com/agmt>`_.
-
-* Enum classes are no longer implicitly converted to ``int``
-  (`#1424 <https://github.com/fmtlib/fmt/issues/1424>`_).
-
-* Added ``basic_format_parse_context`` for consistency with C++20
-  ``std::format`` and deprecated ``basic_parse_context``.
-
-* Fixed handling of UTF-8 in precision
-  (`#1389 <https://github.com/fmtlib/fmt/issues/1389>`_,
-  `#1390 <https://github.com/fmtlib/fmt/pull/1390>`_).
-  Thanks `@tajtiattila (Attila Tajti) <https://github.com/tajtiattila>`_.
-
-* {fmt} can now be installed on Linux, macOS and Windows with
-  `Conda <https://docs.conda.io/en/latest/>`__ using its
-  `conda-forge <https://conda-forge.org>`__
-  `package <https://github.com/conda-forge/fmt-feedstock>`__
-  (`#1410 <https://github.com/fmtlib/fmt/pull/1410>`_)::
-
-    conda install -c conda-forge fmt
-
-  Thanks `@tdegeus (Tom de Geus) <https://github.com/tdegeus>`_.
-
-* Added a CUDA test (`#1285 <https://github.com/fmtlib/fmt/pull/1285>`_,
-  `#1317 <https://github.com/fmtlib/fmt/pull/1317>`_).
-  Thanks `@luncliff (Park DongHa) <https://github.com/luncliff>`_ and
-  `@risa2000 <https://github.com/risa2000>`_.
-
-* Improved documentation (`#1276 <https://github.com/fmtlib/fmt/pull/1276>`_,
-  `#1291 <https://github.com/fmtlib/fmt/issues/1291>`_,
-  `#1296 <https://github.com/fmtlib/fmt/issues/1296>`_,
-  `#1315 <https://github.com/fmtlib/fmt/pull/1315>`_,
-  `#1332 <https://github.com/fmtlib/fmt/pull/1332>`_,
-  `#1337 <https://github.com/fmtlib/fmt/pull/1337>`_,
-  `#1395 <https://github.com/fmtlib/fmt/issues/1395>`_
-  `#1418 <https://github.com/fmtlib/fmt/pull/1418>`_).
-  Thanks
-  `@waywardmonkeys (Bruce Mitchener) <https://github.com/waywardmonkeys>`_,
-  `@pauldreik (Paul Dreik) <https://github.com/pauldreik>`_,
-  `@jackoalan (Jack Andersen) <https://github.com/jackoalan>`_.
-
-* Various code improvements
-  (`#1358 <https://github.com/fmtlib/fmt/pull/1358>`_,
-  `#1407 <https://github.com/fmtlib/fmt/pull/1407>`_).
-  Thanks `@orivej (Orivej Desh) <https://github.com/orivej>`_,
-  `@dpacbach (David P. Sicilia) <https://github.com/dpacbach>`_,
-
-* Fixed compile-time format string checks for user-defined types
-  (`#1292 <https://github.com/fmtlib/fmt/issues/1292>`_).
-
-* Worked around a false positive in ``unsigned-integer-overflow`` sanitizer
-  (`#1377 <https://github.com/fmtlib/fmt/issues/1377>`_).
-
-* Fixed various warnings and compilation issues
-  (`#1273 <https://github.com/fmtlib/fmt/issues/1273>`_,
-  `#1278 <https://github.com/fmtlib/fmt/pull/1278>`_,
-  `#1280 <https://github.com/fmtlib/fmt/pull/1280>`_,
-  `#1281 <https://github.com/fmtlib/fmt/issues/1281>`_,
-  `#1288 <https://github.com/fmtlib/fmt/issues/1288>`_,
-  `#1290 <https://github.com/fmtlib/fmt/pull/1290>`_,
-  `#1301 <https://github.com/fmtlib/fmt/pull/1301>`_,
-  `#1305 <https://github.com/fmtlib/fmt/issues/1305>`_,
-  `#1306 <https://github.com/fmtlib/fmt/issues/1306>`_,
-  `#1309 <https://github.com/fmtlib/fmt/issues/1309>`_,
-  `#1312 <https://github.com/fmtlib/fmt/pull/1312>`_,
-  `#1313 <https://github.com/fmtlib/fmt/issues/1313>`_,
-  `#1316 <https://github.com/fmtlib/fmt/issues/1316>`_,
-  `#1319 <https://github.com/fmtlib/fmt/issues/1319>`_,
-  `#1320 <https://github.com/fmtlib/fmt/pull/1320>`_,
-  `#1326 <https://github.com/fmtlib/fmt/pull/1326>`_,
-  `#1328 <https://github.com/fmtlib/fmt/pull/1328>`_,
-  `#1344 <https://github.com/fmtlib/fmt/issues/1344>`_,
-  `#1345 <https://github.com/fmtlib/fmt/pull/1345>`_,
-  `#1347 <https://github.com/fmtlib/fmt/pull/1347>`_,
-  `#1349 <https://github.com/fmtlib/fmt/pull/1349>`_,
-  `#1354 <https://github.com/fmtlib/fmt/issues/1354>`_,
-  `#1362 <https://github.com/fmtlib/fmt/issues/1362>`_,
-  `#1366 <https://github.com/fmtlib/fmt/issues/1366>`_,
-  `#1364 <https://github.com/fmtlib/fmt/pull/1364>`_,
-  `#1370 <https://github.com/fmtlib/fmt/pull/1370>`_,
-  `#1371 <https://github.com/fmtlib/fmt/pull/1371>`_,
-  `#1385 <https://github.com/fmtlib/fmt/issues/1385>`_,
-  `#1388 <https://github.com/fmtlib/fmt/issues/1388>`_,
-  `#1397 <https://github.com/fmtlib/fmt/pull/1397>`_,
-  `#1414 <https://github.com/fmtlib/fmt/pull/1414>`_,
-  `#1416 <https://github.com/fmtlib/fmt/pull/1416>`_,
-  `#1422 <https://github.com/fmtlib/fmt/issues/1422>`_
-  `#1427 <https://github.com/fmtlib/fmt/pull/1427>`_,
-  `#1431 <https://github.com/fmtlib/fmt/issues/1431>`_,
-  `#1433 <https://github.com/fmtlib/fmt/pull/1433>`_).
-  Thanks `@hhb <https://github.com/hhb>`_,
-  `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
-  `@gabime (Gabi Melman) <https://github.com/gabime>`_,
-  `@neheb (Rosen Penev) <https://github.com/neheb>`_,
-  `@vedranmiletic (Vedran Miletić) <https://github.com/vedranmiletic>`_,
-  `@dkavolis (Daumantas Kavolis) <https://github.com/dkavolis>`_,
-  `@mwinterb <https://github.com/mwinterb>`_,
-  `@orivej (Orivej Desh) <https://github.com/orivej>`_,
-  `@denizevrenci (Deniz Evrenci) <https://github.com/denizevrenci>`_
-  `@leonklingele <https://github.com/leonklingele>`_,
-  `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_,
-  `@kent-tri <https://github.com/kent-tri>`_,
-  `@0x8000-0000 (Florin Iucha) <https://github.com/0x8000-0000>`_,
-  `@marti4d (Chris Martin) <https://github.com/marti4d>`_.
-
-6.0.0 - 2019-08-26
-------------------
-
-* Switched to the `MIT license
-  <https://github.com/fmtlib/fmt/blob/5a4b24613ba16cc689977c3b5bd8274a3ba1dd1f/LICENSE.rst>`_
-  with an optional exception that allows distributing binary code without
-  attribution.
-
-* Floating-point formatting is now locale-independent by default:
-
-  .. code:: c++
-
-     #include <locale>
-     #include <fmt/core.h>
-
-     int main() {
-       std::locale::global(std::locale("ru_RU.UTF-8"));
-       fmt::print("value = {}", 4.2);
-     }
-
-  prints "value = 4.2" regardless of the locale.
-
-  For locale-specific formatting use the ``n`` specifier:
-
-  .. code:: c++
-
-     std::locale::global(std::locale("ru_RU.UTF-8"));
-     fmt::print("value = {:n}", 4.2);
-
-  prints "value = 4,2".
-
-* Added an experimental Grisu floating-point formatting algorithm
-  implementation (disabled by default). To enable it compile with the
-  ``FMT_USE_GRISU`` macro defined to 1:
-
-  .. code:: c++
-
-     #define FMT_USE_GRISU 1
-     #include <fmt/format.h>
-
-     auto s = fmt::format("{}", 4.2); // formats 4.2 using Grisu
-
-  With Grisu enabled, {fmt} is 13x faster than ``std::ostringstream`` (libc++)
-  and 10x faster than ``sprintf`` on `dtoa-benchmark
-  <https://github.com/fmtlib/dtoa-benchmark>`_ (`full results
-  <https://fmt.dev/unknown_mac64_clang10.0.html>`_):
-
-  .. image:: https://user-images.githubusercontent.com/576385/
-             54883977-9fe8c000-4e28-11e9-8bde-272d122e7c52.jpg
-
-* Separated formatting and parsing contexts for consistency with
-  `C++20 std::format <http://eel.is/c++draft/format>`_, removing the
-  undocumented ``basic_format_context::parse_context()`` function.
-
-* Added `oss-fuzz <https://github.com/google/oss-fuzz>`_ support
-  (`#1199 <https://github.com/fmtlib/fmt/pull/1199>`_).
-  Thanks `@pauldreik (Paul Dreik) <https://github.com/pauldreik>`_.
-
-* ``formatter`` specializations now always take precedence over ``operator<<``
-  (`#952 <https://github.com/fmtlib/fmt/issues/952>`_):
-
-  .. code:: c++
-
-     #include <iostream>
-     #include <fmt/ostream.h>
-
-     struct S {};
-
-     std::ostream& operator<<(std::ostream& os, S) {
-       return os << 1;
-     }
-
-     template <>
-     struct fmt::formatter<S> : fmt::formatter<int> {
-       auto format(S, format_context& ctx) {
-         return formatter<int>::format(2, ctx);
-       }
-     };
-
-     int main() {
-       std::cout << S() << "\n"; // prints 1 using operator<<
-       fmt::print("{}\n", S());  // prints 2 using formatter
-     }
-
-* Introduced the experimental ``fmt::compile`` function that does format string
-  compilation (`#618 <https://github.com/fmtlib/fmt/issues/618>`_,
-  `#1169 <https://github.com/fmtlib/fmt/issues/1169>`_,
-  `#1171 <https://github.com/fmtlib/fmt/pull/1171>`_):
-
-  .. code:: c++
-
-     #include <fmt/compile.h>
-
-     auto f = fmt::compile<int>("{}");
-     std::string s = fmt::format(f, 42); // can be called multiple times to
-                                         // format different values
-     // s == "42"
-
-  It moves the cost of parsing a format string outside of the format function
-  which can be beneficial when identically formatting many objects of the same
-  types. Thanks `@stryku (Mateusz Janek) <https://github.com/stryku>`_.
-
-* Added experimental ``%`` format specifier that formats floating-point values
-  as percentages (`#1060 <https://github.com/fmtlib/fmt/pull/1060>`_,
-  `#1069 <https://github.com/fmtlib/fmt/pull/1069>`_,
-  `#1071 <https://github.com/fmtlib/fmt/pull/1071>`_):
-
-  .. code:: c++
-
-     auto s = fmt::format("{:.1%}", 0.42); // s == "42.0%"
-
-  Thanks `@gawain-bolton (Gawain Bolton) <https://github.com/gawain-bolton>`_.
-
-* Implemented precision for floating-point durations
-  (`#1004 <https://github.com/fmtlib/fmt/issues/1004>`_,
-  `#1012 <https://github.com/fmtlib/fmt/pull/1012>`_):
-
-  .. code:: c++
-
-     auto s = fmt::format("{:.1}", std::chrono::duration<double>(1.234));
-     // s == 1.2s
-
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
-
-* Implemented ``chrono`` format specifiers ``%Q`` and ``%q`` that give the value
-  and the unit respectively (`#1019 <https://github.com/fmtlib/fmt/pull/1019>`_):
-
-  .. code:: c++
-
-     auto value = fmt::format("{:%Q}", 42s); // value == "42"
-     auto unit  = fmt::format("{:%q}", 42s); // unit == "s"
-
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
-
-* Fixed handling of dynamic width in chrono formatter:
-
-  .. code:: c++
-
-     auto s = fmt::format("{0:{1}%H:%M:%S}", std::chrono::seconds(12345), 12);
-     //                        ^ width argument index                     ^ width
-     // s == "03:25:45    "
-
-  Thanks Howard Hinnant.
-
-* Removed deprecated ``fmt/time.h``. Use ``fmt/chrono.h`` instead.
-
-* Added ``fmt::format`` and ``fmt::vformat`` overloads that take ``text_style``
-  (`#993 <https://github.com/fmtlib/fmt/issues/993>`_,
-  `#994 <https://github.com/fmtlib/fmt/pull/994>`_):
-
-  .. code:: c++
-
-     #include <fmt/color.h>
-
-     std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red),
-                                       "The answer is {}.", 42);
-
-  Thanks `@Naios (Denis Blank) <https://github.com/Naios>`_.
-
-* Removed the deprecated color API (``print_colored``). Use the new API, namely
-  ``print`` overloads that take ``text_style`` instead.
-
-* Made ``std::unique_ptr`` and ``std::shared_ptr`` formattable as pointers via
-  ``fmt::ptr`` (`#1121 <https://github.com/fmtlib/fmt/pull/1121>`_):
-
-  .. code:: c++
-
-     std::unique_ptr<int> p = ...;
-     fmt::print("{}", fmt::ptr(p)); // prints p as a pointer
-
-  Thanks `@sighingnow (Tao He) <https://github.com/sighingnow>`_.
-
-* Made ``print`` and ``vprint`` report I/O errors
-  (`#1098 <https://github.com/fmtlib/fmt/issues/1098>`_,
-  `#1099 <https://github.com/fmtlib/fmt/pull/1099>`_).
-  Thanks `@BillyDonahue (Billy Donahue) <https://github.com/BillyDonahue>`_.
-
-* Marked deprecated APIs with the ``[[deprecated]]`` attribute and removed
-  internal uses of deprecated APIs
-  (`#1022 <https://github.com/fmtlib/fmt/pull/1022>`_).
-  Thanks `@eliaskosunen (Elias Kosunen) <https://github.com/eliaskosunen>`_.
-
-* Modernized the codebase using more C++11 features and removing workarounds.
-  Most importantly, ``buffer_context`` is now an alias template, so
-  use ``buffer_context<T>`` instead of ``buffer_context<T>::type``.
-  These features require GCC 4.8 or later.
-
-* ``formatter`` specializations now always take precedence over implicit
-  conversions to ``int`` and the undocumented ``convert_to_int`` trait
-  is now deprecated.
-
-* Moved the undocumented ``basic_writer``, ``writer``, and ``wwriter`` types
-  to the ``internal`` namespace.
-
-* Removed deprecated ``basic_format_context::begin()``. Use ``out()`` instead.
-
-* Disallowed passing the result of ``join`` as an lvalue to prevent misuse.
-
-* Refactored the undocumented structs that represent parsed format specifiers
-  to simplify the API and allow multibyte fill.
-
-* Moved SFINAE to template parameters to reduce symbol sizes.
-
-* Switched to ``fputws`` for writing wide strings so that it's no longer
-  required to call ``_setmode`` on Windows
-  (`#1229 <https://github.com/fmtlib/fmt/issues/1229>`_,
-  `#1243 <https://github.com/fmtlib/fmt/pull/1243>`_).
-  Thanks `@jackoalan (Jack Andersen) <https://github.com/jackoalan>`_.
-
-* Improved literal-based API
-  (`#1254 <https://github.com/fmtlib/fmt/pull/1254>`_).
-  Thanks `@sylveon (Charles Milette) <https://github.com/sylveon>`_.
-
-* Added support for exotic platforms without ``uintptr_t`` such as IBM i
-  (AS/400) which has 128-bit pointers and only 64-bit integers
-  (`#1059 <https://github.com/fmtlib/fmt/issues/1059>`_).
-
-* Added `Sublime Text syntax highlighting config
-  <https://github.com/fmtlib/fmt/blob/master/support/C%2B%2B.sublime-syntax>`_
-  (`#1037 <https://github.com/fmtlib/fmt/issues/1037>`_).
-  Thanks `@Kronuz (Germán Méndez Bravo) <https://github.com/Kronuz>`_.
-
-* Added the ``FMT_ENFORCE_COMPILE_STRING`` macro to enforce the use of
-  compile-time format strings
-  (`#1231 <https://github.com/fmtlib/fmt/pull/1231>`_).
-  Thanks `@jackoalan (Jack Andersen) <https://github.com/jackoalan>`_.
-
-* Stopped setting ``CMAKE_BUILD_TYPE`` if {fmt} is a subproject
-  (`#1081 <https://github.com/fmtlib/fmt/issues/1081>`_).
-
-* Various build improvements
-  (`#1039 <https://github.com/fmtlib/fmt/pull/1039>`_,
-  `#1078 <https://github.com/fmtlib/fmt/pull/1078>`_,
-  `#1091 <https://github.com/fmtlib/fmt/pull/1091>`_,
-  `#1103 <https://github.com/fmtlib/fmt/pull/1103>`_,
-  `#1177 <https://github.com/fmtlib/fmt/pull/1177>`_).
-  Thanks `@luncliff (Park DongHa) <https://github.com/luncliff>`_,
-  `@jasonszang (Jason Shuo Zang) <https://github.com/jasonszang>`_,
-  `@olafhering (Olaf Hering) <https://github.com/olafhering>`_,
-  `@Lecetem <https://github.com/Lectem>`_,
-  `@pauldreik (Paul Dreik) <https://github.com/pauldreik>`_.
-
-* Improved documentation
-  (`#1049 <https://github.com/fmtlib/fmt/issues/1049>`_,
-  `#1051 <https://github.com/fmtlib/fmt/pull/1051>`_,
-  `#1083 <https://github.com/fmtlib/fmt/pull/1083>`_,
-  `#1113 <https://github.com/fmtlib/fmt/pull/1113>`_,
-  `#1114 <https://github.com/fmtlib/fmt/pull/1114>`_,
-  `#1146 <https://github.com/fmtlib/fmt/issues/1146>`_,
-  `#1180 <https://github.com/fmtlib/fmt/issues/1180>`_,
-  `#1250 <https://github.com/fmtlib/fmt/pull/1250>`_,
-  `#1252 <https://github.com/fmtlib/fmt/pull/1252>`_,
-  `#1265 <https://github.com/fmtlib/fmt/pull/1265>`_).
-  Thanks `@mikelui (Michael Lui) <https://github.com/mikelui>`_,
-  `@foonathan (Jonathan Müller) <https://github.com/foonathan>`_,
-  `@BillyDonahue (Billy Donahue) <https://github.com/BillyDonahue>`_,
-  `@jwakely (Jonathan Wakely) <https://github.com/jwakely>`_,
-  `@kaisbe (Kais Ben Salah) <https://github.com/kaisbe>`_,
-  `@sdebionne (Samuel Debionne) <https://github.com/sdebionne>`_.
-
-* Fixed ambiguous formatter specialization in ``fmt/ranges.h``
-  (`#1123 <https://github.com/fmtlib/fmt/issues/1123>`_).
-
-* Fixed formatting of a non-empty ``std::filesystem::path`` which is an
-  infinitely deep range of its components
-  (`#1268 <https://github.com/fmtlib/fmt/issues/1268>`_).
-
-* Fixed handling of general output iterators when formatting characters
-  (`#1056 <https://github.com/fmtlib/fmt/issues/1056>`_,
-  `#1058 <https://github.com/fmtlib/fmt/pull/1058>`_).
-  Thanks `@abolz (Alexander Bolz) <https://github.com/abolz>`_.
-
-* Fixed handling of output iterators in ``formatter`` specialization for
-  ranges (`#1064 <https://github.com/fmtlib/fmt/issues/1064>`_).
-
-* Fixed handling of exotic character types
-  (`#1188 <https://github.com/fmtlib/fmt/issues/1188>`_).
-
-* Made chrono formatting work with exceptions disabled
-  (`#1062 <https://github.com/fmtlib/fmt/issues/1062>`_).
-
-* Fixed DLL visibility issues
-  (`#1134 <https://github.com/fmtlib/fmt/pull/1134>`_,
-  `#1147 <https://github.com/fmtlib/fmt/pull/1147>`_).
-  Thanks `@denchat <https://github.com/denchat>`_.
-
-* Disabled the use of UDL template extension on GCC 9
-  (`#1148 <https://github.com/fmtlib/fmt/issues/1148>`_).
-
-* Removed misplaced ``format`` compile-time checks from ``printf``
-  (`#1173 <https://github.com/fmtlib/fmt/issues/1173>`_).
-
-* Fixed issues in the experimental floating-point formatter
-  (`#1072 <https://github.com/fmtlib/fmt/issues/1072>`_,
-  `#1129 <https://github.com/fmtlib/fmt/issues/1129>`_,
-  `#1153 <https://github.com/fmtlib/fmt/issues/1153>`_,
-  `#1155 <https://github.com/fmtlib/fmt/pull/1155>`_,
-  `#1210 <https://github.com/fmtlib/fmt/issues/1210>`_,
-  `#1222 <https://github.com/fmtlib/fmt/issues/1222>`_).
-  Thanks `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_.
-
-* Fixed bugs discovered by fuzzing or during fuzzing integration
-  (`#1124 <https://github.com/fmtlib/fmt/issues/1124>`_,
-  `#1127 <https://github.com/fmtlib/fmt/issues/1127>`_,
-  `#1132 <https://github.com/fmtlib/fmt/issues/1132>`_,
-  `#1135 <https://github.com/fmtlib/fmt/pull/1135>`_,
-  `#1136 <https://github.com/fmtlib/fmt/issues/1136>`_,
-  `#1141 <https://github.com/fmtlib/fmt/issues/1141>`_,
-  `#1142 <https://github.com/fmtlib/fmt/issues/1142>`_,
-  `#1178 <https://github.com/fmtlib/fmt/issues/1178>`_,
-  `#1179 <https://github.com/fmtlib/fmt/issues/1179>`_,
-  `#1194 <https://github.com/fmtlib/fmt/issues/1194>`_).
-  Thanks `@pauldreik (Paul Dreik) <https://github.com/pauldreik>`_.
-
-* Fixed building tests on FreeBSD and Hurd
-  (`#1043 <https://github.com/fmtlib/fmt/issues/1043>`_).
-  Thanks `@jackyf (Eugene V. Lyubimkin) <https://github.com/jackyf>`_.
-
-* Fixed various warnings and compilation issues
-  (`#998 <https://github.com/fmtlib/fmt/pull/998>`_,
-  `#1006 <https://github.com/fmtlib/fmt/pull/1006>`_,
-  `#1008 <https://github.com/fmtlib/fmt/issues/1008>`_,
-  `#1011 <https://github.com/fmtlib/fmt/issues/1011>`_,
-  `#1025 <https://github.com/fmtlib/fmt/issues/1025>`_,
-  `#1027 <https://github.com/fmtlib/fmt/pull/1027>`_,
-  `#1028 <https://github.com/fmtlib/fmt/pull/1028>`_,
-  `#1029 <https://github.com/fmtlib/fmt/pull/1029>`_,
-  `#1030 <https://github.com/fmtlib/fmt/pull/1030>`_,
-  `#1031 <https://github.com/fmtlib/fmt/pull/1031>`_,
-  `#1054 <https://github.com/fmtlib/fmt/pull/1054>`_,
-  `#1063 <https://github.com/fmtlib/fmt/issues/1063>`_,
-  `#1068 <https://github.com/fmtlib/fmt/pull/1068>`_,
-  `#1074 <https://github.com/fmtlib/fmt/pull/1074>`_,
-  `#1075 <https://github.com/fmtlib/fmt/pull/1075>`_,
-  `#1079 <https://github.com/fmtlib/fmt/pull/1079>`_,
-  `#1086 <https://github.com/fmtlib/fmt/pull/1086>`_,
-  `#1088 <https://github.com/fmtlib/fmt/issues/1088>`_,
-  `#1089 <https://github.com/fmtlib/fmt/pull/1089>`_,
-  `#1094 <https://github.com/fmtlib/fmt/pull/1094>`_,
-  `#1101 <https://github.com/fmtlib/fmt/issues/1101>`_,
-  `#1102 <https://github.com/fmtlib/fmt/pull/1102>`_,
-  `#1105 <https://github.com/fmtlib/fmt/issues/1105>`_,
-  `#1107 <https://github.com/fmtlib/fmt/pull/1107>`_,
-  `#1115 <https://github.com/fmtlib/fmt/issues/1115>`_,
-  `#1117 <https://github.com/fmtlib/fmt/issues/1117>`_,
-  `#1118 <https://github.com/fmtlib/fmt/issues/1118>`_,
-  `#1120 <https://github.com/fmtlib/fmt/issues/1120>`_,
-  `#1123 <https://github.com/fmtlib/fmt/issues/1123>`_,
-  `#1139 <https://github.com/fmtlib/fmt/pull/1139>`_,
-  `#1140 <https://github.com/fmtlib/fmt/issues/1140>`_,
-  `#1143 <https://github.com/fmtlib/fmt/issues/1143>`_,
-  `#1144 <https://github.com/fmtlib/fmt/pull/1144>`_,
-  `#1150 <https://github.com/fmtlib/fmt/pull/1150>`_,
-  `#1151 <https://github.com/fmtlib/fmt/pull/1151>`_,
-  `#1152 <https://github.com/fmtlib/fmt/issues/1152>`_,
-  `#1154 <https://github.com/fmtlib/fmt/issues/1154>`_,
-  `#1156 <https://github.com/fmtlib/fmt/issues/1156>`_,
-  `#1159 <https://github.com/fmtlib/fmt/pull/1159>`_,
-  `#1175 <https://github.com/fmtlib/fmt/issues/1175>`_,
-  `#1181 <https://github.com/fmtlib/fmt/issues/1181>`_,
-  `#1186 <https://github.com/fmtlib/fmt/issues/1186>`_,
-  `#1187 <https://github.com/fmtlib/fmt/pull/1187>`_,
-  `#1191 <https://github.com/fmtlib/fmt/pull/1191>`_,
-  `#1197 <https://github.com/fmtlib/fmt/issues/1197>`_,
-  `#1200 <https://github.com/fmtlib/fmt/issues/1200>`_,
-  `#1203 <https://github.com/fmtlib/fmt/issues/1203>`_,
-  `#1205 <https://github.com/fmtlib/fmt/issues/1205>`_,
-  `#1206 <https://github.com/fmtlib/fmt/pull/1206>`_,
-  `#1213 <https://github.com/fmtlib/fmt/issues/1213>`_,
-  `#1214 <https://github.com/fmtlib/fmt/issues/1214>`_,
-  `#1217 <https://github.com/fmtlib/fmt/pull/1217>`_,
-  `#1228 <https://github.com/fmtlib/fmt/issues/1228>`_,
-  `#1230 <https://github.com/fmtlib/fmt/pull/1230>`_,
-  `#1232 <https://github.com/fmtlib/fmt/issues/1232>`_,
-  `#1235 <https://github.com/fmtlib/fmt/pull/1235>`_,
-  `#1236 <https://github.com/fmtlib/fmt/pull/1236>`_,
-  `#1240 <https://github.com/fmtlib/fmt/issues/1240>`_).
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
-  `@mwinterb <https://github.com/mwinterb>`_,
-  `@eliaskosunen (Elias Kosunen) <https://github.com/eliaskosunen>`_,
-  `@morinmorin <https://github.com/morinmorin>`_,
-  `@ricco19 (Brian Ricciardelli) <https://github.com/ricco19>`_,
-  `@waywardmonkeys (Bruce Mitchener) <https://github.com/waywardmonkeys>`_,
-  `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_,
-  `@remyabel <https://github.com/remyabel>`_,
-  `@pauldreik (Paul Dreik) <https://github.com/pauldreik>`_,
-  `@gsjaardema (Greg Sjaardema) <https://github.com/gsjaardema>`_,
-  `@rcane (Ronny Krüger) <https://github.com/rcane>`_,
-  `@mocabe <https://github.com/mocabe>`_,
-  `@denchat <https://github.com/denchat>`_,
-  `@cjdb (Christopher Di Bella) <https://github.com/cjdb>`_,
-  `@HazardyKnusperkeks (Björn Schäpers) <https://github.com/HazardyKnusperkeks>`_,
-  `@vedranmiletic (Vedran Miletić) <https://github.com/vedranmiletic>`_,
-  `@jackoalan (Jack Andersen) <https://github.com/jackoalan>`_,
-  `@DaanDeMeyer (Daan De Meyer) <https://github.com/DaanDeMeyer>`_,
-  `@starkmapper (Mark Stapper) <https://github.com/starkmapper>`_.
-
-5.3.0 - 2018-12-28
-------------------
-
-* Introduced experimental chrono formatting support:
-
-  .. code:: c++
-
-     #include <fmt/chrono.h>
-
-     int main() {
-       using namespace std::literals::chrono_literals;
-       fmt::print("Default format: {} {}\n", 42s, 100ms);
-       fmt::print("strftime-like format: {:%H:%M:%S}\n", 3h + 15min + 30s);
-     }
-
-  prints::
-
-     Default format: 42s 100ms
-     strftime-like format: 03:15:30
-
-* Added experimental support for emphasis (bold, italic, underline,
-  strikethrough), colored output to a file stream, and improved colored
-  formatting API
-  (`#961 <https://github.com/fmtlib/fmt/pull/961>`_,
-  `#967 <https://github.com/fmtlib/fmt/pull/967>`_,
-  `#973 <https://github.com/fmtlib/fmt/pull/973>`_):
-
-  .. code:: c++
-
-     #include <fmt/color.h>
-
-     int main() {
-       print(fg(fmt::color::crimson) | fmt::emphasis::bold,
-             "Hello, {}!\n", "world");
-       print(fg(fmt::color::floral_white) | bg(fmt::color::slate_gray) |
-             fmt::emphasis::underline, "Hello, {}!\n", "мир");
-       print(fg(fmt::color::steel_blue) | fmt::emphasis::italic,
-             "Hello, {}!\n", "世界");
-     }
-
-  prints the following on modern terminals with RGB color support:
-
-  .. image:: https://user-images.githubusercontent.com/576385/
-             50405788-b66e7500-076e-11e9-9592-7324d1f951d8.png
-
-  Thanks `@Rakete1111 (Nicolas) <https://github.com/Rakete1111>`_.
-
-* Added support for 4-bit terminal colors
-  (`#968 <https://github.com/fmtlib/fmt/issues/968>`_,
-  `#974 <https://github.com/fmtlib/fmt/pull/974>`_)
-
-  .. code:: c++
-
-     #include <fmt/color.h>
-
-     int main() {
-       print(fg(fmt::terminal_color::red), "stop\n");
-     }
-
-  Note that these colors vary by terminal:
-
-  .. image:: https://user-images.githubusercontent.com/576385/
-             50405925-dbfc7e00-0770-11e9-9b85-333fab0af9ac.png
-
-  Thanks `@Rakete1111 (Nicolas) <https://github.com/Rakete1111>`_.
-
-* Parameterized formatting functions on the type of the format string
-  (`#880 <https://github.com/fmtlib/fmt/issues/880>`_,
-  `#881 <https://github.com/fmtlib/fmt/pull/881>`_,
-  `#883 <https://github.com/fmtlib/fmt/pull/883>`_,
-  `#885 <https://github.com/fmtlib/fmt/pull/885>`_,
-  `#897 <https://github.com/fmtlib/fmt/pull/897>`_,
-  `#920 <https://github.com/fmtlib/fmt/issues/920>`_).
-  Any object of type ``S`` that has an overloaded ``to_string_view(const S&)``
-  returning ``fmt::string_view`` can be used as a format string:
-
-  .. code:: c++
-
-     namespace my_ns {
-     inline string_view to_string_view(const my_string& s) {
-       return {s.data(), s.length()};
-     }
-     }
-
-     std::string message = fmt::format(my_string("The answer is {}."), 42);
-
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
-
-* Made ``std::string_view`` work as a format string
-  (`#898 <https://github.com/fmtlib/fmt/pull/898>`_):
-
-  .. code:: c++
-
-     auto message = fmt::format(std::string_view("The answer is {}."), 42);
-
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
-
-* Added wide string support to compile-time format string checks
-  (`#924 <https://github.com/fmtlib/fmt/pull/924>`_):
-
-  .. code:: c++
-
-     print(fmt(L"{:f}"), 42); // compile-time error: invalid type specifier
-
-  Thanks `@XZiar <https://github.com/XZiar>`_.
-
-* Made colored print functions work with wide strings
-  (`#867 <https://github.com/fmtlib/fmt/pull/867>`_):
-
-  .. code:: c++
-
-     #include <fmt/color.h>
-
-     int main() {
-       print(fg(fmt::color::red), L"{}\n", 42);
-     }
-
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
-
-* Introduced experimental Unicode support
-  (`#628 <https://github.com/fmtlib/fmt/issues/628>`_,
-  `#891 <https://github.com/fmtlib/fmt/pull/891>`_):
-
-  .. code:: c++
-
-     using namespace fmt::literals;
-     auto s = fmt::format("{:*^5}"_u, "🤡"_u); // s == "**🤡**"_u
-
-* Improved locale support:
-
-  .. code:: c++
-
-     #include <fmt/locale.h>
-
-     struct numpunct : std::numpunct<char> {
-      protected:
-       char do_thousands_sep() const override { return '~'; }
-     };
-
-     std::locale loc;
-     auto s = fmt::format(std::locale(loc, new numpunct()), "{:n}", 1234567);
-     // s == "1~234~567"
-
-* Constrained formatting functions on proper iterator types
-  (`#921 <https://github.com/fmtlib/fmt/pull/921>`_).
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
-
-* Added ``make_printf_args`` and ``make_wprintf_args`` functions
-  (`#934 <https://github.com/fmtlib/fmt/pull/934>`_).
-  Thanks `@tnovotny <https://github.com/tnovotny>`_.
-
-* Deprecated ``fmt::visit``, ``parse_context``, and ``wparse_context``.
-  Use ``fmt::visit_format_arg``, ``format_parse_context``, and
-  ``wformat_parse_context`` instead.
-
-* Removed undocumented ``basic_fixed_buffer`` which has been superseded by the
-  iterator-based API
-  (`#873 <https://github.com/fmtlib/fmt/issues/873>`_,
-  `#902 <https://github.com/fmtlib/fmt/pull/902>`_).
-  Thanks `@superfunc (hollywood programmer) <https://github.com/superfunc>`_.
-
-* Disallowed repeated leading zeros in an argument ID:
-
-  .. code:: c++
-
-     fmt::print("{000}", 42); // error
-
-* Reintroduced support for gcc 4.4.
-
-* Fixed compilation on platforms with exotic ``double``
-  (`#878 <https://github.com/fmtlib/fmt/issues/878>`_).
-
-* Improved documentation
-  (`#164 <https://github.com/fmtlib/fmt/issues/164>`_,
-  `#877 <https://github.com/fmtlib/fmt/issues/877>`_,
-  `#901 <https://github.com/fmtlib/fmt/pull/901>`_,
-  `#906 <https://github.com/fmtlib/fmt/pull/906>`_,
-  `#979 <https://github.com/fmtlib/fmt/pull/979>`_).
-  Thanks `@kookjr (Mathew Cucuzella) <https://github.com/kookjr>`_,
-  `@DarkDimius (Dmitry Petrashko) <https://github.com/DarkDimius>`_,
-  `@HecticSerenity <https://github.com/HecticSerenity>`_.
-
-* Added pkgconfig support which makes it easier to consume the library from
-  meson and other build systems
-  (`#916 <https://github.com/fmtlib/fmt/pull/916>`_).
-  Thanks `@colemickens (Cole Mickens) <https://github.com/colemickens>`_.
-
-* Various build improvements
-  (`#909 <https://github.com/fmtlib/fmt/pull/909>`_,
-  `#926 <https://github.com/fmtlib/fmt/pull/926>`_,
-  `#937 <https://github.com/fmtlib/fmt/pull/937>`_,
-  `#953 <https://github.com/fmtlib/fmt/pull/953>`_,
-  `#959 <https://github.com/fmtlib/fmt/pull/959>`_).
-  Thanks `@tchaikov (Kefu Chai) <https://github.com/tchaikov>`_,
-  `@luncliff (Park DongHa) <https://github.com/luncliff>`_,
-  `@AndreasSchoenle (Andreas Schönle) <https://github.com/AndreasSchoenle>`_,
-  `@hotwatermorning <https://github.com/hotwatermorning>`_,
-  `@Zefz (JohanJansen) <https://github.com/Zefz>`_.
-
-* Improved ``string_view`` construction performance
-  (`#914 <https://github.com/fmtlib/fmt/pull/914>`_).
-  Thanks `@gabime (Gabi Melman) <https://github.com/gabime>`_.
-
-* Fixed non-matching char types
-  (`#895 <https://github.com/fmtlib/fmt/pull/895>`_).
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
-
-* Fixed ``format_to_n`` with ``std::back_insert_iterator``
-  (`#913 <https://github.com/fmtlib/fmt/pull/913>`_).
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
-
-* Fixed locale-dependent formatting
-  (`#905 <https://github.com/fmtlib/fmt/issues/905>`_).
-
-* Fixed various compiler warnings and errors
-  (`#882 <https://github.com/fmtlib/fmt/pull/882>`_,
-  `#886 <https://github.com/fmtlib/fmt/pull/886>`_,
-  `#933 <https://github.com/fmtlib/fmt/pull/933>`_,
-  `#941 <https://github.com/fmtlib/fmt/pull/941>`_,
-  `#931 <https://github.com/fmtlib/fmt/issues/931>`_,
-  `#943 <https://github.com/fmtlib/fmt/pull/943>`_,
-  `#954 <https://github.com/fmtlib/fmt/pull/954>`_,
-  `#956 <https://github.com/fmtlib/fmt/pull/956>`_,
-  `#962 <https://github.com/fmtlib/fmt/pull/962>`_,
-  `#965 <https://github.com/fmtlib/fmt/issues/965>`_,
-  `#977 <https://github.com/fmtlib/fmt/issues/977>`_,
-  `#983 <https://github.com/fmtlib/fmt/pull/983>`_,
-  `#989 <https://github.com/fmtlib/fmt/pull/989>`_).
-  Thanks `@Luthaf (Guillaume Fraux) <https://github.com/Luthaf>`_,
-  `@stevenhoving (Steven Hoving) <https://github.com/stevenhoving>`_,
-  `@christinaa (Kristina Brooks) <https://github.com/christinaa>`_,
-  `@lgritz (Larry Gritz) <https://github.com/lgritz>`_,
-  `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
-  `@0x8000-0000 (Sign Bit) <https://github.com/0x8000-0000>`_,
-  `@liuping1997 <https://github.com/liuping1997>`_.
-
-5.2.1 - 2018-09-21
-------------------
-
-* Fixed ``visit`` lookup issues on gcc 7 & 8
-  (`#870 <https://github.com/fmtlib/fmt/pull/870>`_).
-  Thanks `@medithe <https://github.com/medithe>`_.
-
-* Fixed linkage errors on older gcc.
-
-* Prevented ``fmt/range.h`` from specializing ``fmt::basic_string_view``
-  (`#865 <https://github.com/fmtlib/fmt/issues/865>`_,
-  `#868 <https://github.com/fmtlib/fmt/pull/868>`_).
-  Thanks `@hhggit (dual) <https://github.com/hhggit>`_.
-
-* Improved error message when formatting unknown types
-  (`#872 <https://github.com/fmtlib/fmt/pull/872>`_).
-  Thanks `@foonathan (Jonathan Müller) <https://github.com/foonathan>`_,
-
-* Disabled templated user-defined literals when compiled under nvcc
-  (`#875 <https://github.com/fmtlib/fmt/pull/875>`_).
-  Thanks `@CandyGumdrop (Candy Gumdrop) <https://github.com/CandyGumdrop>`_,
-
-* Fixed ``format_to`` formatting to ``wmemory_buffer``
-  (`#874 <https://github.com/fmtlib/fmt/issues/874>`_).
-
-5.2.0 - 2018-09-13
-------------------
-
-* Optimized format string parsing and argument processing which resulted in up
-  to 5x speed up on long format strings and significant performance boost on
-  various benchmarks. For example, version 5.2 is 2.22x faster than 5.1 on
-  decimal integer formatting with ``format_to`` (macOS, clang-902.0.39.2):
-
-  ==================  =======  =======
-  Method              Time, s  Speedup
-  ==================  =======  =======
-  fmt::format 5.1      0.58
-  fmt::format 5.2      0.35     1.66x
-  fmt::format_to 5.1   0.51
-  fmt::format_to 5.2   0.23     2.22x
-  sprintf              0.71
-  std::to_string       1.01
-  std::stringstream    1.73
-  ==================  =======  =======
-
-* Changed the ``fmt`` macro from opt-out to opt-in to prevent name collisions.
-  To enable it define the ``FMT_STRING_ALIAS`` macro to 1 before including
-  ``fmt/format.h``:
-
-  .. code:: c++
-
-     #define FMT_STRING_ALIAS 1
-     #include <fmt/format.h>
-     std::string answer = format(fmt("{}"), 42);
-
-* Added compile-time format string checks to ``format_to`` overload that takes
-  ``fmt::memory_buffer`` (`#783 <https://github.com/fmtlib/fmt/issues/783>`_):
-
-  .. code:: c++
-
-     fmt::memory_buffer buf;
-     // Compile-time error: invalid type specifier.
-     fmt::format_to(buf, fmt("{:d}"), "foo");
-
-* Moved experimental color support to ``fmt/color.h`` and enabled the
-  new API by default. The old API can be enabled by defining the
-  ``FMT_DEPRECATED_COLORS`` macro.
-
-* Added formatting support for types explicitly convertible to
-  ``fmt::string_view``:
-
-  .. code:: c++
-
-     struct foo {
-       explicit operator fmt::string_view() const { return "foo"; }
-     };
-     auto s = format("{}", foo());
-
-  In particular, this makes formatting function work with
-  ``folly::StringPiece``.
-
-* Implemented preliminary support for ``char*_t`` by replacing the ``format``
-  function overloads with a single function template parameterized on the string
-  type.
-
-* Added support for dynamic argument lists
-  (`#814 <https://github.com/fmtlib/fmt/issues/814>`_,
-  `#819 <https://github.com/fmtlib/fmt/pull/819>`_).
-  Thanks `@MikePopoloski (Michael Popoloski)
-  <https://github.com/MikePopoloski>`_.
-
-* Reduced executable size overhead for embedded targets using newlib nano by
-  making locale dependency optional
-  (`#839 <https://github.com/fmtlib/fmt/pull/839>`_).
-  Thanks `@teajay-fr (Thomas Benard) <https://github.com/teajay-fr>`_.
-
-* Keep ``noexcept`` specifier when exceptions are disabled
-  (`#801 <https://github.com/fmtlib/fmt/issues/801>`_,
-  `#810 <https://github.com/fmtlib/fmt/pull/810>`_).
-  Thanks `@qis (Alexej Harm) <https://github.com/qis>`_.
-
-* Fixed formatting of user-defined types providing ``operator<<`` with
-  ``format_to_n``
-  (`#806 <https://github.com/fmtlib/fmt/pull/806>`_).
-  Thanks `@mkurdej (Marek Kurdej) <https://github.com/mkurdej>`_.
-
-* Fixed dynamic linkage of new symbols
-  (`#808 <https://github.com/fmtlib/fmt/issues/808>`_).
-
-* Fixed global initialization issue
-  (`#807 <https://github.com/fmtlib/fmt/issues/807>`_):
-
-  .. code:: c++
-
-     // This works on compilers with constexpr support.
-     static const std::string answer = fmt::format("{}", 42);
-
-* Fixed various compiler warnings and errors
-  (`#804 <https://github.com/fmtlib/fmt/pull/804>`_,
-  `#809 <https://github.com/fmtlib/fmt/issues/809>`_,
-  `#811 <https://github.com/fmtlib/fmt/pull/811>`_,
-  `#822 <https://github.com/fmtlib/fmt/issues/822>`_,
-  `#827 <https://github.com/fmtlib/fmt/pull/827>`_,
-  `#830 <https://github.com/fmtlib/fmt/issues/830>`_,
-  `#838 <https://github.com/fmtlib/fmt/pull/838>`_,
-  `#843 <https://github.com/fmtlib/fmt/issues/843>`_,
-  `#844 <https://github.com/fmtlib/fmt/pull/844>`_,
-  `#851 <https://github.com/fmtlib/fmt/issues/851>`_,
-  `#852 <https://github.com/fmtlib/fmt/pull/852>`_,
-  `#854 <https://github.com/fmtlib/fmt/pull/854>`_).
-  Thanks `@henryiii (Henry Schreiner) <https://github.com/henryiii>`_,
-  `@medithe <https://github.com/medithe>`_, and
-  `@eliasdaler (Elias Daler) <https://github.com/eliasdaler>`_.
-
-5.1.0 - 2018-07-05
-------------------
-
-* Added experimental support for RGB color output enabled with
-  the ``FMT_EXTENDED_COLORS`` macro:
-
-  .. code:: c++
-
-     #define FMT_EXTENDED_COLORS
-     #define FMT_HEADER_ONLY // or compile fmt with FMT_EXTENDED_COLORS defined
-     #include <fmt/format.h>
-
-     fmt::print(fmt::color::steel_blue, "Some beautiful text");
-
-  The old API (the ``print_colored`` and ``vprint_colored`` functions and the
-  ``color`` enum) is now deprecated.
-  (`#762 <https://github.com/fmtlib/fmt/issues/762>`_
-  `#767 <https://github.com/fmtlib/fmt/pull/767>`_).
-  thanks `@Remotion (Remo) <https://github.com/Remotion>`_.
-
-* Added quotes to strings in ranges and tuples
-  (`#766 <https://github.com/fmtlib/fmt/pull/766>`_).
-  Thanks `@Remotion (Remo) <https://github.com/Remotion>`_.
-
-* Made ``format_to`` work with ``basic_memory_buffer``
-  (`#776 <https://github.com/fmtlib/fmt/issues/776>`_).
-
-* Added ``vformat_to_n`` and ``wchar_t`` overload of ``format_to_n``
-  (`#764 <https://github.com/fmtlib/fmt/issues/764>`_,
-  `#769 <https://github.com/fmtlib/fmt/issues/769>`_).
-
-* Made ``is_range`` and ``is_tuple_like`` part of public (experimental) API
-  to allow specialization for user-defined types
-  (`#751 <https://github.com/fmtlib/fmt/issues/751>`_,
-  `#759 <https://github.com/fmtlib/fmt/pull/759>`_).
-  Thanks `@drrlvn (Dror Levin) <https://github.com/drrlvn>`_.
-
-* Added more compilers to continuous integration and increased ``FMT_PEDANTIC``
-  warning levels
-  (`#736 <https://github.com/fmtlib/fmt/pull/736>`_).
-  Thanks `@eliaskosunen (Elias Kosunen) <https://github.com/eliaskosunen>`_.
-
-* Fixed compilation with MSVC 2013.
-
-* Fixed handling of user-defined types in ``format_to``
-  (`#793 <https://github.com/fmtlib/fmt/issues/793>`_).
-
-* Forced linking of inline ``vformat`` functions into the library
-  (`#795 <https://github.com/fmtlib/fmt/issues/795>`_).
-
-* Fixed incorrect call to on_align in ``'{:}='``
-  (`#750 <https://github.com/fmtlib/fmt/issues/750>`_).
-
-* Fixed floating-point formatting to a non-back_insert_iterator with sign &
-  numeric alignment specified
-  (`#756 <https://github.com/fmtlib/fmt/issues/756>`_).
-
-* Fixed formatting to an array with ``format_to_n``
-  (`#778 <https://github.com/fmtlib/fmt/issues/778>`_).
-
-* Fixed formatting of more than 15 named arguments
-  (`#754 <https://github.com/fmtlib/fmt/issues/754>`_).
-
-* Fixed handling of compile-time strings when including ``fmt/ostream.h``.
-  (`#768 <https://github.com/fmtlib/fmt/issues/768>`_).
-
-* Fixed various compiler warnings and errors
-  (`#742 <https://github.com/fmtlib/fmt/issues/742>`_,
-  `#748 <https://github.com/fmtlib/fmt/issues/748>`_,
-  `#752 <https://github.com/fmtlib/fmt/issues/752>`_,
-  `#770 <https://github.com/fmtlib/fmt/issues/770>`_,
-  `#775 <https://github.com/fmtlib/fmt/pull/775>`_,
-  `#779 <https://github.com/fmtlib/fmt/issues/779>`_,
-  `#780 <https://github.com/fmtlib/fmt/pull/780>`_,
-  `#790 <https://github.com/fmtlib/fmt/pull/790>`_,
-  `#792 <https://github.com/fmtlib/fmt/pull/792>`_,
-  `#800 <https://github.com/fmtlib/fmt/pull/800>`_).
-  Thanks `@Remotion (Remo) <https://github.com/Remotion>`_,
-  `@gabime (Gabi Melman) <https://github.com/gabime>`_,
-  `@foonathan (Jonathan Müller) <https://github.com/foonathan>`_,
-  `@Dark-Passenger (Dhruv Paranjape) <https://github.com/Dark-Passenger>`_, and
-  `@0x8000-0000 (Sign Bit) <https://github.com/0x8000-0000>`_.
-
-5.0.0 - 2018-05-21
-------------------
-
-* Added a requirement for partial C++11 support, most importantly variadic
-  templates and type traits, and dropped ``FMT_VARIADIC_*`` emulation macros.
-  Variadic templates are available since GCC 4.4, Clang 2.9 and MSVC 18.0 (2013).
-  For older compilers use {fmt} `version 4.x
-  <https://github.com/fmtlib/fmt/releases/tag/4.1.0>`_ which continues to be
-  maintained and works with C++98 compilers.
-
-* Renamed symbols to follow standard C++ naming conventions and proposed a subset
-  of the library for standardization in `P0645R2 Text Formatting
-  <https://wg21.link/P0645>`_.
-
-* Implemented ``constexpr`` parsing of format strings and `compile-time format
-  string checks
-  <https://fmt.dev/latest/api.html#compile-time-format-string-checks>`_. For
-  example
-
-  .. code:: c++
-
-     #include <fmt/format.h>
-
-     std::string s = format(fmt("{:d}"), "foo");
-
-  gives a compile-time error because ``d`` is an invalid specifier for strings
-  (`godbolt <https://godbolt.org/g/rnCy9Q>`__)::
-
-     ...
-     <source>:4:19: note: in instantiation of function template specialization 'fmt::v5::format<S, char [4]>' requested here
-       std::string s = format(fmt("{:d}"), "foo");
-                       ^
-     format.h:1337:13: note: non-constexpr function 'on_error' cannot be used in a constant expression
-         handler.on_error("invalid type specifier");
-
-  Compile-time checks require relaxed ``constexpr`` (C++14 feature) support. If
-  the latter is not available, checks will be performed at runtime.
-
-* Separated format string parsing and formatting in the extension API to enable
-  compile-time format string processing. For example
-
-  .. code:: c++
-
-     struct Answer {};
-
-     namespace fmt {
-     template <>
-     struct formatter<Answer> {
-       constexpr auto parse(parse_context& ctx) {
-         auto it = ctx.begin();
-         spec = *it;
-         if (spec != 'd' && spec != 's')
-           throw format_error("invalid specifier");
-         return ++it;
-       }
-
-       template <typename FormatContext>
-       auto format(Answer, FormatContext& ctx) {
-         return spec == 's' ?
-           format_to(ctx.begin(), "{}", "fourty-two") :
-           format_to(ctx.begin(), "{}", 42);
-       }
-
-       char spec = 0;
-     };
-     }
-
-     std::string s = format(fmt("{:x}"), Answer());
-
-  gives a compile-time error due to invalid format specifier (`godbolt
-  <https://godbolt.org/g/2jQ1Dv>`__)::
-
-     ...
-     <source>:12:45: error: expression '<throw-expression>' is not a constant expression
-            throw format_error("invalid specifier");
-
-* Added `iterator support
-  <https://fmt.dev/latest/api.html#output-iterator-support>`_:
-
-  .. code:: c++
-
-     #include <vector>
-     #include <fmt/format.h>
-
-     std::vector<char> out;
-     fmt::format_to(std::back_inserter(out), "{}", 42);
-
-* Added the `format_to_n
-  <https://fmt.dev/latest/api.html#_CPPv2N3fmt11format_to_nE8OutputItNSt6size_tE11string_viewDpRK4Args>`_
-  function that restricts the output to the specified number of characters
-  (`#298 <https://github.com/fmtlib/fmt/issues/298>`_):
-
-  .. code:: c++
-
-     char out[4];
-     fmt::format_to_n(out, sizeof(out), "{}", 12345);
-     // out == "1234" (without terminating '\0')
-
-* Added the `formatted_size
-  <https://fmt.dev/latest/api.html#_CPPv2N3fmt14formatted_sizeE11string_viewDpRK4Args>`_
-  function for computing the output size:
-
-  .. code:: c++
-
-     #include <fmt/format.h>
-
-     auto size = fmt::formatted_size("{}", 12345); // size == 5
-
-* Improved compile times by reducing dependencies on standard headers and
-  providing a lightweight `core API <https://fmt.dev/latest/api.html#core-api>`_:
-
-  .. code:: c++
-
-     #include <fmt/core.h>
-
-     fmt::print("The answer is {}.", 42);
-
-  See `Compile time and code bloat
-  <https://github.com/fmtlib/fmt#compile-time-and-code-bloat>`_.
-
-* Added the `make_format_args
-  <https://fmt.dev/latest/api.html#_CPPv2N3fmt16make_format_argsEDpRK4Args>`_
-  function for capturing formatting arguments:
-
-  .. code:: c++
-  
-     // Prints formatted error message.
-     void vreport_error(const char *format, fmt::format_args args) {
-       fmt::print("Error: ");
-       fmt::vprint(format, args);
-     }
-     template <typename... Args>
-     void report_error(const char *format, const Args & ... args) {
-       vreport_error(format, fmt::make_format_args(args...));
-     }
-
-* Added the ``make_printf_args`` function for capturing ``printf`` arguments
-  (`#687 <https://github.com/fmtlib/fmt/issues/687>`_,
-  `#694 <https://github.com/fmtlib/fmt/pull/694>`_).
-  Thanks `@Kronuz (Germán Méndez Bravo) <https://github.com/Kronuz>`_.
-
-* Added prefix ``v`` to non-variadic functions taking ``format_args`` to
-  distinguish them from variadic ones:
-
-  .. code:: c++
-
-     std::string vformat(string_view format_str, format_args args);
-     
-     template <typename... Args>
-     std::string format(string_view format_str, const Args & ... args);
-
-* Added experimental support for formatting ranges, containers and tuple-like
-  types in ``fmt/ranges.h`` (`#735 <https://github.com/fmtlib/fmt/pull/735>`_):
-
-  .. code:: c++
-
-     #include <fmt/ranges.h>
-
-     std::vector<int> v = {1, 2, 3};
-     fmt::print("{}", v); // prints {1, 2, 3}
-
-  Thanks `@Remotion (Remo) <https://github.com/Remotion>`_.
-
-* Implemented ``wchar_t`` date and time formatting
-  (`#712 <https://github.com/fmtlib/fmt/pull/712>`_):
-
-  .. code:: c++
-
-     #include <fmt/time.h>
-
-     std::time_t t = std::time(nullptr);
-     auto s = fmt::format(L"The date is {:%Y-%m-%d}.", *std::localtime(&t));
-
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
-
-* Provided more wide string overloads
-  (`#724 <https://github.com/fmtlib/fmt/pull/724>`_).
-  Thanks `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_.
-
-* Switched from a custom null-terminated string view class to ``string_view``
-  in the format API and provided ``fmt::string_view`` which implements a subset
-  of ``std::string_view`` API for pre-C++17 systems.
-
-* Added support for ``std::experimental::string_view``
-  (`#607 <https://github.com/fmtlib/fmt/pull/607>`_):
-
-  .. code:: c++
-
-     #include <fmt/core.h>
-     #include <experimental/string_view>
-
-     fmt::print("{}", std::experimental::string_view("foo"));
-
-  Thanks `@virgiliofornazin (Virgilio Alexandre Fornazin)
-  <https://github.com/virgiliofornazin>`__.
-
-* Allowed mixing named and automatic arguments:
-
-  .. code:: c++
-
-     fmt::format("{} {two}", 1, fmt::arg("two", 2));
-
-* Removed the write API in favor of the `format API
-  <https://fmt.dev/latest/api.html#format-api>`_ with compile-time handling of
-  format strings.
-
-* Disallowed formatting of multibyte strings into a wide character target
-  (`#606 <https://github.com/fmtlib/fmt/pull/606>`_).
-
-* Improved documentation
-  (`#515 <https://github.com/fmtlib/fmt/pull/515>`_,
-  `#614 <https://github.com/fmtlib/fmt/issues/614>`_,
-  `#617 <https://github.com/fmtlib/fmt/pull/617>`_,
-  `#661 <https://github.com/fmtlib/fmt/pull/661>`_,
-  `#680 <https://github.com/fmtlib/fmt/pull/680>`_).
-  Thanks `@ibell (Ian Bell) <https://github.com/ibell>`_,
-  `@mihaitodor (Mihai Todor) <https://github.com/mihaitodor>`_, and
-  `@johnthagen <https://github.com/johnthagen>`_.
-
-* Implemented more efficient handling of large number of format arguments.
-
-* Introduced an inline namespace for symbol versioning.
-
-* Added debug postfix ``d`` to the ``fmt`` library name
-  (`#636 <https://github.com/fmtlib/fmt/issues/636>`_).
-
-* Removed unnecessary ``fmt/`` prefix in includes
-  (`#397 <https://github.com/fmtlib/fmt/pull/397>`_).
-  Thanks `@chronoxor (Ivan Shynkarenka) <https://github.com/chronoxor>`_.
-
-* Moved ``fmt/*.h`` to ``include/fmt/*.h`` to prevent irrelevant files and
-  directories appearing on the include search paths when fmt is used as a
-  subproject and moved source files to the ``src`` directory.
-
-* Added qmake project file ``support/fmt.pro``
-  (`#641 <https://github.com/fmtlib/fmt/pull/641>`_).
-  Thanks `@cowo78 (Giuseppe Corbelli) <https://github.com/cowo78>`_.
-
-* Added Gradle build file ``support/build.gradle``
-  (`#649 <https://github.com/fmtlib/fmt/pull/649>`_).
-  Thanks `@luncliff (Park DongHa) <https://github.com/luncliff>`_.
-
-* Removed ``FMT_CPPFORMAT`` CMake option.
-
-* Fixed a name conflict with the macro ``CHAR_WIDTH`` in glibc
-  (`#616 <https://github.com/fmtlib/fmt/pull/616>`_).
-  Thanks `@aroig (Abdó Roig-Maranges) <https://github.com/aroig>`_.
-
-* Fixed handling of nested braces in ``fmt::join``
-  (`#638 <https://github.com/fmtlib/fmt/issues/638>`_).
-
-* Added ``SOURCELINK_SUFFIX`` for compatibility with Sphinx 1.5
-  (`#497 <https://github.com/fmtlib/fmt/pull/497>`_).
-  Thanks `@ginggs (Graham Inggs) <https://github.com/ginggs>`_.
-
-* Added a missing ``inline`` in the header-only mode
-  (`#626 <https://github.com/fmtlib/fmt/pull/626>`_).
-  Thanks `@aroig (Abdó Roig-Maranges) <https://github.com/aroig>`_.
-
-* Fixed various compiler warnings
-  (`#640 <https://github.com/fmtlib/fmt/pull/640>`_,
-  `#656 <https://github.com/fmtlib/fmt/pull/656>`_,
-  `#679 <https://github.com/fmtlib/fmt/pull/679>`_,
-  `#681 <https://github.com/fmtlib/fmt/pull/681>`_,
-  `#705 <https://github.com/fmtlib/fmt/pull/705>`__,
-  `#715 <https://github.com/fmtlib/fmt/issues/715>`_,
-  `#717 <https://github.com/fmtlib/fmt/pull/717>`_,
-  `#720 <https://github.com/fmtlib/fmt/pull/720>`_,
-  `#723 <https://github.com/fmtlib/fmt/pull/723>`_,
-  `#726 <https://github.com/fmtlib/fmt/pull/726>`_,
-  `#730 <https://github.com/fmtlib/fmt/pull/730>`_,
-  `#739 <https://github.com/fmtlib/fmt/pull/739>`_).
-  Thanks `@peterbell10 <https://github.com/peterbell10>`_,
-  `@LarsGullik <https://github.com/LarsGullik>`_,
-  `@foonathan (Jonathan Müller) <https://github.com/foonathan>`_,
-  `@eliaskosunen (Elias Kosunen) <https://github.com/eliaskosunen>`_,
-  `@christianparpart (Christian Parpart) <https://github.com/christianparpart>`_,
-  `@DanielaE (Daniela Engert) <https://github.com/DanielaE>`_,
-  and `@mwinterb <https://github.com/mwinterb>`_.
-
-* Worked around an MSVC bug and fixed several warnings
-  (`#653 <https://github.com/fmtlib/fmt/pull/653>`_).
-  Thanks `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_.
-
-* Worked around GCC bug 67371
-  (`#682 <https://github.com/fmtlib/fmt/issues/682>`_).
-
-* Fixed compilation with ``-fno-exceptions``
-  (`#655 <https://github.com/fmtlib/fmt/pull/655>`_).
-  Thanks `@chenxiaolong (Andrew Gunnerson) <https://github.com/chenxiaolong>`_.
-
-* Made ``constexpr remove_prefix`` gcc version check tighter
-  (`#648 <https://github.com/fmtlib/fmt/issues/648>`_).
-
-* Renamed internal type enum constants to prevent collision with poorly written
-  C libraries (`#644 <https://github.com/fmtlib/fmt/issues/644>`_).
-
-* Added detection of ``wostream operator<<``
-  (`#650 <https://github.com/fmtlib/fmt/issues/650>`_).
-
-* Fixed compilation on OpenBSD
-  (`#660 <https://github.com/fmtlib/fmt/pull/660>`_).
-  Thanks `@hubslave <https://github.com/hubslave>`_.
-
-* Fixed compilation on FreeBSD 12
-  (`#732 <https://github.com/fmtlib/fmt/pull/732>`_).
-  Thanks `@dankm <https://github.com/dankm>`_.
-
-* Fixed compilation when there is a mismatch between ``-std`` options between
-  the library and user code
-  (`#664 <https://github.com/fmtlib/fmt/issues/664>`_).
-
-* Fixed compilation with GCC 7 and ``-std=c++11``
-  (`#734 <https://github.com/fmtlib/fmt/issues/734>`_).
-
-* Improved generated binary code on GCC 7 and older
-  (`#668 <https://github.com/fmtlib/fmt/issues/668>`_).
-
-* Fixed handling of numeric alignment with no width 
-  (`#675 <https://github.com/fmtlib/fmt/issues/675>`_).
-
-* Fixed handling of empty strings in UTF8/16 converters
-  (`#676 <https://github.com/fmtlib/fmt/pull/676>`_).
-  Thanks `@vgalka-sl (Vasili Galka) <https://github.com/vgalka-sl>`_.
-
-* Fixed formatting of an empty ``string_view``
-  (`#689 <https://github.com/fmtlib/fmt/issues/689>`_).
-
-* Fixed detection of ``string_view`` on libc++ 
-  (`#686 <https://github.com/fmtlib/fmt/issues/686>`_).
-
-* Fixed DLL issues (`#696 <https://github.com/fmtlib/fmt/pull/696>`_).
-  Thanks `@sebkoenig <https://github.com/sebkoenig>`_.
-
-* Fixed compile checks for mixing narrow and wide strings
-  (`#690 <https://github.com/fmtlib/fmt/issues/690>`_).
-
-* Disabled unsafe implicit conversion to ``std::string``
-  (`#729 <https://github.com/fmtlib/fmt/issues/729>`_).
-
-* Fixed handling of reused format specs (as in ``fmt::join``) for pointers
-  (`#725 <https://github.com/fmtlib/fmt/pull/725>`_).
-  Thanks `@mwinterb <https://github.com/mwinterb>`_.
-
-* Fixed installation of ``fmt/ranges.h``
-  (`#738 <https://github.com/fmtlib/fmt/pull/738>`_).
-  Thanks `@sv1990 <https://github.com/sv1990>`_.
-
-4.1.0 - 2017-12-20
-------------------
-
-* Added ``fmt::to_wstring()`` in addition to ``fmt::to_string()``
-  (`#559 <https://github.com/fmtlib/fmt/pull/559>`_).
-  Thanks `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_.
-
-* Added support for C++17 ``std::string_view``
-  (`#571 <https://github.com/fmtlib/fmt/pull/571>`_ and
-  `#578 <https://github.com/fmtlib/fmt/pull/578>`_).
-  Thanks `@thelostt (Mário Feroldi) <https://github.com/thelostt>`_ and
-  `@mwinterb <https://github.com/mwinterb>`_.
-
-* Enabled stream exceptions to catch errors
-  (`#581 <https://github.com/fmtlib/fmt/issues/581>`_).
-  Thanks `@crusader-mike <https://github.com/crusader-mike>`_.
-
-* Allowed formatting of class hierarchies with ``fmt::format_arg()``
-  (`#547 <https://github.com/fmtlib/fmt/pull/547>`_).
-  Thanks `@rollbear (Björn Fahller) <https://github.com/rollbear>`_.
-
-* Removed limitations on character types
-  (`#563 <https://github.com/fmtlib/fmt/pull/563>`_).
-  Thanks `@Yelnats321 (Elnar Dakeshov) <https://github.com/Yelnats321>`_.
-
-* Conditionally enabled use of ``std::allocator_traits``
-  (`#583 <https://github.com/fmtlib/fmt/pull/583>`_).
-  Thanks `@mwinterb <https://github.com/mwinterb>`_.
-
-* Added support for ``const`` variadic member function emulation with
-  ``FMT_VARIADIC_CONST`` (`#591 <https://github.com/fmtlib/fmt/pull/591>`_).
-  Thanks `@ludekvodicka (Ludek Vodicka) <https://github.com/ludekvodicka>`_.
-
-* Various bugfixes: bad overflow check, unsupported implicit type conversion
-  when determining formatting function, test segfaults
-  (`#551 <https://github.com/fmtlib/fmt/issues/551>`_), ill-formed macros
-  (`#542 <https://github.com/fmtlib/fmt/pull/542>`_) and ambiguous overloads
-  (`#580 <https://github.com/fmtlib/fmt/issues/580>`_).
-  Thanks `@xylosper (Byoung-young Lee) <https://github.com/xylosper>`_.
-
-* Prevented warnings on MSVC (`#605 <https://github.com/fmtlib/fmt/pull/605>`_,
-  `#602 <https://github.com/fmtlib/fmt/pull/602>`_, and
-  `#545 <https://github.com/fmtlib/fmt/pull/545>`_),
-  clang (`#582 <https://github.com/fmtlib/fmt/pull/582>`_),
-  GCC (`#573 <https://github.com/fmtlib/fmt/issues/573>`_),
-  various conversion warnings (`#609 <https://github.com/fmtlib/fmt/pull/609>`_,
-  `#567 <https://github.com/fmtlib/fmt/pull/567>`_,
-  `#553 <https://github.com/fmtlib/fmt/pull/553>`_ and
-  `#553 <https://github.com/fmtlib/fmt/pull/553>`_), and added ``override`` and
-  ``[[noreturn]]`` (`#549 <https://github.com/fmtlib/fmt/pull/549>`_ and
-  `#555 <https://github.com/fmtlib/fmt/issues/555>`_).
-  Thanks `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_,
-  `@virgiliofornazin (Virgilio Alexandre Fornazin)
-  <https://gihtub.com/virgiliofornazin>`_,
-  `@alexanderbock (Alexander Bock) <https://github.com/alexanderbock>`_,
-  `@yumetodo <https://github.com/yumetodo>`_,
-  `@VaderY (Császár Mátyás) <https://github.com/VaderY>`_,
-  `@jpcima (JP Cimalando) <https://github.com/jpcima>`_,
-  `@thelostt (Mário Feroldi) <https://github.com/thelostt>`_, and
-  `@Manu343726 (Manu Sánchez) <https://github.com/Manu343726>`_.
-
-* Improved CMake: Used ``GNUInstallDirs`` to set installation location
-  (`#610 <https://github.com/fmtlib/fmt/pull/610>`_) and fixed warnings
-  (`#536 <https://github.com/fmtlib/fmt/pull/536>`_ and
-  `#556 <https://github.com/fmtlib/fmt/pull/556>`_).
-  Thanks `@mikecrowe (Mike Crowe) <https://github.com/mikecrowe>`_,
-  `@evgen231 <https://github.com/evgen231>`_ and
-  `@henryiii (Henry Schreiner) <https://github.com/henryiii>`_.
-
-4.0.0 - 2017-06-27
-------------------
-
-* Removed old compatibility headers ``cppformat/*.h`` and CMake options
-  (`#527 <https://github.com/fmtlib/fmt/pull/527>`_).
-  Thanks `@maddinat0r (Alex Martin) <https://github.com/maddinat0r>`_.
-
-* Added ``string.h`` containing ``fmt::to_string()`` as alternative to
-  ``std::to_string()`` as well as other string writer functionality
-  (`#326 <https://github.com/fmtlib/fmt/issues/326>`_ and
-  `#441 <https://github.com/fmtlib/fmt/pull/441>`_):
-
-  .. code:: c++
-
-    #include "fmt/string.h"
-  
-    std::string answer = fmt::to_string(42);
-
-  Thanks to `@glebov-andrey (Andrey Glebov)
-  <https://github.com/glebov-andrey>`_.
-
-* Moved ``fmt::printf()`` to new ``printf.h`` header and allowed ``%s`` as
-  generic specifier (`#453 <https://github.com/fmtlib/fmt/pull/453>`_),
-  made ``%.f`` more conformant to regular ``printf()``
-  (`#490 <https://github.com/fmtlib/fmt/pull/490>`_), added custom writer
-  support (`#476 <https://github.com/fmtlib/fmt/issues/476>`_) and implemented
-  missing custom argument formatting
-  (`#339 <https://github.com/fmtlib/fmt/pull/339>`_ and
-  `#340 <https://github.com/fmtlib/fmt/pull/340>`_):
-
-  .. code:: c++
-
-    #include "fmt/printf.h"
- 
-    // %s format specifier can be used with any argument type.
-    fmt::printf("%s", 42);
-
-  Thanks `@mojoBrendan <https://github.com/mojoBrendan>`_,
-  `@manylegged (Arthur Danskin) <https://github.com/manylegged>`_ and
-  `@spacemoose (Glen Stark) <https://github.com/spacemoose>`_.
-  See also `#360 <https://github.com/fmtlib/fmt/issues/360>`_,
-  `#335 <https://github.com/fmtlib/fmt/issues/335>`_ and
-  `#331 <https://github.com/fmtlib/fmt/issues/331>`_.
-
-* Added ``container.h`` containing a ``BasicContainerWriter``
-  to write to containers like ``std::vector``
-  (`#450 <https://github.com/fmtlib/fmt/pull/450>`_).
-  Thanks `@polyvertex (Jean-Charles Lefebvre) <https://github.com/polyvertex>`_.
-
-* Added ``fmt::join()`` function that takes a range and formats
-  its elements separated by a given string
-  (`#466 <https://github.com/fmtlib/fmt/pull/466>`_):
-
-  .. code:: c++
-
-    #include "fmt/format.h"
- 
-    std::vector<double> v = {1.2, 3.4, 5.6};
-    // Prints "(+01.20, +03.40, +05.60)".
-    fmt::print("({:+06.2f})", fmt::join(v.begin(), v.end(), ", "));
-
-  Thanks `@olivier80 <https://github.com/olivier80>`_.
-
-* Added support for custom formatting specifications to simplify customization
-  of built-in formatting (`#444 <https://github.com/fmtlib/fmt/pull/444>`_).
-  Thanks `@polyvertex (Jean-Charles Lefebvre) <https://github.com/polyvertex>`_.
-  See also `#439 <https://github.com/fmtlib/fmt/issues/439>`_.
-
-* Added ``fmt::format_system_error()`` for error code formatting
-  (`#323 <https://github.com/fmtlib/fmt/issues/323>`_ and
-  `#526 <https://github.com/fmtlib/fmt/pull/526>`_).
-  Thanks `@maddinat0r (Alex Martin) <https://github.com/maddinat0r>`_.
-
-* Added thread-safe ``fmt::localtime()`` and ``fmt::gmtime()``
-  as replacement   for the standard version to ``time.h``
-  (`#396 <https://github.com/fmtlib/fmt/pull/396>`_).
-  Thanks `@codicodi <https://github.com/codicodi>`_.
-
-* Internal improvements to ``NamedArg`` and ``ArgLists``
-  (`#389 <https://github.com/fmtlib/fmt/pull/389>`_ and
-  `#390 <https://github.com/fmtlib/fmt/pull/390>`_).
-  Thanks `@chronoxor <https://github.com/chronoxor>`_.
-
-* Fixed crash due to bug in ``FormatBuf``
-  (`#493 <https://github.com/fmtlib/fmt/pull/493>`_).
-  Thanks `@effzeh <https://github.com/effzeh>`_. See also
-  `#480 <https://github.com/fmtlib/fmt/issues/480>`_ and
-  `#491 <https://github.com/fmtlib/fmt/issues/491>`_.
-
-* Fixed handling of wide strings in ``fmt::StringWriter``.
-
-* Improved compiler error messages
-  (`#357 <https://github.com/fmtlib/fmt/issues/357>`_).
-
-* Fixed various warnings and issues with various compilers
-  (`#494 <https://github.com/fmtlib/fmt/pull/494>`_,
-  `#499 <https://github.com/fmtlib/fmt/pull/499>`_,
-  `#483 <https://github.com/fmtlib/fmt/pull/483>`_,
-  `#485 <https://github.com/fmtlib/fmt/pull/485>`_,
-  `#482 <https://github.com/fmtlib/fmt/pull/482>`_,
-  `#475 <https://github.com/fmtlib/fmt/pull/475>`_,
-  `#473 <https://github.com/fmtlib/fmt/pull/473>`_ and
-  `#414 <https://github.com/fmtlib/fmt/pull/414>`_).
-  Thanks `@chronoxor <https://github.com/chronoxor>`_,
-  `@zhaohuaxishi <https://github.com/zhaohuaxishi>`_,
-  `@pkestene (Pierre Kestener) <https://github.com/pkestene>`_,
-  `@dschmidt (Dominik Schmidt) <https://github.com/dschmidt>`_ and
-  `@0x414c (Alexey Gorishny) <https://github.com/0x414c>`_ .
-
-* Improved CMake: targets are now namespaced
-  (`#511 <https://github.com/fmtlib/fmt/pull/511>`_ and
-  `#513 <https://github.com/fmtlib/fmt/pull/513>`_), supported header-only
-  ``printf.h`` (`#354 <https://github.com/fmtlib/fmt/pull/354>`_), fixed issue
-  with minimal supported library subset
-  (`#418 <https://github.com/fmtlib/fmt/issues/418>`_,
-  `#419 <https://github.com/fmtlib/fmt/pull/419>`_ and
-  `#420 <https://github.com/fmtlib/fmt/pull/420>`_).
-  Thanks `@bjoernthiel (Bjoern Thiel) <https://github.com/bjoernthiel>`_,
-  `@niosHD (Mario Werner) <https://github.com/niosHD>`_,
-  `@LogicalKnight (Sean LK) <https://github.com/LogicalKnight>`_ and
-  `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_.
-
-* Improved documentation. Thanks to
-  `@pwm1234 (Phil) <https://github.com/pwm1234>`_ for
-  `#393 <https://github.com/fmtlib/fmt/pull/393>`_.
-
-3.0.2 - 2017-06-14
-------------------
-
-* Added ``FMT_VERSION`` macro
-  (`#411 <https://github.com/fmtlib/fmt/issues/411>`_).
-
-* Used ``FMT_NULL`` instead of literal ``0``
-  (`#409 <https://github.com/fmtlib/fmt/pull/409>`_).
-  Thanks `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_.
-
-* Added extern templates for ``format_float``
-  (`#413 <https://github.com/fmtlib/fmt/issues/413>`_).
-
-* Fixed implicit conversion issue
-  (`#507 <https://github.com/fmtlib/fmt/issues/507>`_).
-
-* Fixed signbit detection (`#423 <https://github.com/fmtlib/fmt/issues/423>`_).
-
-* Fixed naming collision (`#425 <https://github.com/fmtlib/fmt/issues/425>`_).
-
-* Fixed missing intrinsic for C++/CLI
-  (`#457 <https://github.com/fmtlib/fmt/pull/457>`_).
-  Thanks `@calumr (Calum Robinson) <https://github.com/calumr>`_
-
-* Fixed Android detection (`#458 <https://github.com/fmtlib/fmt/pull/458>`_).
-  Thanks `@Gachapen (Magnus Bjerke Vik) <https://github.com/Gachapen>`_.
-
-* Use lean ``windows.h`` if not in header-only mode
-  (`#503 <https://github.com/fmtlib/fmt/pull/503>`_).
-  Thanks `@Quentin01 (Quentin Buathier) <https://github.com/Quentin01>`_.
-
-* Fixed issue with CMake exporting C++11 flag
-  (`#445 <https://github.com/fmtlib/fmt/pull/455>`_).
-  Thanks `@EricWF (Eric) <https://github.com/EricWF>`_.
-
-* Fixed issue with nvcc and MSVC compiler bug and MinGW
-  (`#505 <https://github.com/fmtlib/fmt/issues/505>`_).
-
-* Fixed DLL issues (`#469 <https://github.com/fmtlib/fmt/pull/469>`_ and
-  `#502 <https://github.com/fmtlib/fmt/pull/502>`_).
-  Thanks `@richardeakin (Richard Eakin) <https://github.com/richardeakin>`_ and
-  `@AndreasSchoenle (Andreas Schönle) <https://github.com/AndreasSchoenle>`_.
-
-* Fixed test compilation under FreeBSD
-  (`#433 <https://github.com/fmtlib/fmt/issues/433>`_).
-
-* Fixed various warnings (`#403 <https://github.com/fmtlib/fmt/pull/403>`_,
-  `#410 <https://github.com/fmtlib/fmt/pull/410>`_ and
-  `#510 <https://github.com/fmtlib/fmt/pull/510>`_).
-  Thanks `@Lecetem <https://github.com/Lectem>`_,
-  `@chenhayat (Chen Hayat) <https://github.com/chenhayat>`_ and
-  `@trozen <https://github.com/trozen>`_.
-
-* Worked around a broken ``__builtin_clz`` in clang with MS codegen
-  (`#519 <https://github.com/fmtlib/fmt/issues/519>`_).
-
-* Removed redundant include
-  (`#479 <https://github.com/fmtlib/fmt/issues/479>`_).
-
-* Fixed documentation issues.
-
-3.0.1 - 2016-11-01
-------------------
-* Fixed handling of thousands separator
-  (`#353 <https://github.com/fmtlib/fmt/issues/353>`_).
-
-* Fixed handling of ``unsigned char`` strings
-  (`#373 <https://github.com/fmtlib/fmt/issues/373>`_).
-
-* Corrected buffer growth when formatting time
-  (`#367 <https://github.com/fmtlib/fmt/issues/367>`_).
-
-* Removed warnings under MSVC and clang
-  (`#318 <https://github.com/fmtlib/fmt/issues/318>`_,
-  `#250 <https://github.com/fmtlib/fmt/issues/250>`_, also merged
-  `#385 <https://github.com/fmtlib/fmt/pull/385>`_ and
-  `#361 <https://github.com/fmtlib/fmt/pull/361>`_).
-  Thanks `@jcelerier (Jean-Michaël Celerier) <https://github.com/jcelerier>`_
-  and `@nmoehrle (Nils Moehrle) <https://github.com/nmoehrle>`_.
-
-* Fixed compilation issues under Android
-  (`#327 <https://github.com/fmtlib/fmt/pull/327>`_,
-  `#345 <https://github.com/fmtlib/fmt/issues/345>`_ and
-  `#381 <https://github.com/fmtlib/fmt/pull/381>`_),
-  FreeBSD (`#358 <https://github.com/fmtlib/fmt/pull/358>`_),
-  Cygwin (`#388 <https://github.com/fmtlib/fmt/issues/388>`_),
-  MinGW (`#355 <https://github.com/fmtlib/fmt/issues/355>`_) as well as other
-  issues (`#350 <https://github.com/fmtlib/fmt/issues/350>`_,
-  `#366 <https://github.com/fmtlib/fmt/issues/355>`_,
-  `#348 <https://github.com/fmtlib/fmt/pull/348>`_,
-  `#402 <https://github.com/fmtlib/fmt/pull/402>`_,
-  `#405 <https://github.com/fmtlib/fmt/pull/405>`_).
-  Thanks to `@dpantele (Dmitry) <https://github.com/dpantele>`_,
-  `@hghwng (Hugh Wang) <https://github.com/hghwng>`_,
-  `@arvedarved (Tilman Keskinöz) <https://github.com/arvedarved>`_,
-  `@LogicalKnight (Sean) <https://github.com/LogicalKnight>`_ and
-  `@JanHellwig (Jan Hellwig) <https://github.com/janhellwig>`_.
-
-* Fixed some documentation issues and extended specification
-  (`#320 <https://github.com/fmtlib/fmt/issues/320>`_,
-  `#333 <https://github.com/fmtlib/fmt/pull/333>`_,
-  `#347 <https://github.com/fmtlib/fmt/issues/347>`_,
-  `#362 <https://github.com/fmtlib/fmt/pull/362>`_).
-  Thanks to `@smellman (Taro Matsuzawa aka. btm)
-  <https://github.com/smellman>`_.
-
-3.0.0 - 2016-05-07
-------------------
-
-* The project has been renamed from C++ Format (cppformat) to fmt for
-  consistency with the used namespace and macro prefix
-  (`#307 <https://github.com/fmtlib/fmt/issues/307>`_).
-  Library headers are now located in the ``fmt`` directory:
-
-  .. code:: c++
-
-    #include "fmt/format.h"
-
-  Including ``format.h`` from the ``cppformat`` directory is deprecated
-  but works via a proxy header which will be removed in the next major version.
-  
-  The documentation is now available at https://fmt.dev.
-
-* Added support for `strftime <http://en.cppreference.com/w/cpp/chrono/c/strftime>`_-like
-  `date and time formatting <https://fmt.dev/3.0.0/api.html#date-and-time-formatting>`_
-  (`#283 <https://github.com/fmtlib/fmt/issues/283>`_):
-
-  .. code:: c++
-
-    #include "fmt/time.h"
-
-    std::time_t t = std::time(nullptr);
-    // Prints "The date is 2016-04-29." (with the current date)
-    fmt::print("The date is {:%Y-%m-%d}.", *std::localtime(&t));
-
-* ``std::ostream`` support including formatting of user-defined types that provide
-  overloaded ``operator<<`` has been moved to ``fmt/ostream.h``:
-
-  .. code:: c++
-
-    #include "fmt/ostream.h"
-
-    class Date {
-      int year_, month_, day_;
-    public:
-      Date(int year, int month, int day) : year_(year), month_(month), day_(day) {}
-
-      friend std::ostream &operator<<(std::ostream &os, const Date &d) {
-        return os << d.year_ << '-' << d.month_ << '-' << d.day_;
-      }
-    };
-
-    std::string s = fmt::format("The date is {}", Date(2012, 12, 9));
-    // s == "The date is 2012-12-9"
-
-* Added support for `custom argument formatters
-  <https://fmt.dev/3.0.0/api.html#argument-formatters>`_
-  (`#235 <https://github.com/fmtlib/fmt/issues/235>`_).
-
-* Added support for locale-specific integer formatting with the ``n`` specifier
-  (`#305 <https://github.com/fmtlib/fmt/issues/305>`_):
-
-  .. code:: c++
-
-    std::setlocale(LC_ALL, "en_US.utf8");
-    fmt::print("cppformat: {:n}\n", 1234567); // prints 1,234,567
-
-* Sign is now preserved when formatting an integer with an incorrect ``printf``
-  format specifier (`#265 <https://github.com/fmtlib/fmt/issues/265>`_):
-
-  .. code:: c++
-
-    fmt::printf("%lld", -42); // prints -42
-
-  Note that it would be an undefined behavior in ``std::printf``.
-
-* Length modifiers such as ``ll`` are now optional in printf formatting
-  functions and the correct type is determined automatically
-  (`#255 <https://github.com/fmtlib/fmt/issues/255>`_):
-
-  .. code:: c++
-
-    fmt::printf("%d", std::numeric_limits<long long>::max());
-
-  Note that it would be an undefined behavior in ``std::printf``.
-
-* Added initial support for custom formatters
-  (`#231 <https://github.com/fmtlib/fmt/issues/231>`_).
-
-* Fixed detection of user-defined literal support on Intel C++ compiler
-  (`#311 <https://github.com/fmtlib/fmt/issues/311>`_,
-  `#312 <https://github.com/fmtlib/fmt/pull/312>`_).
-  Thanks to `@dean0x7d (Dean Moldovan) <https://github.com/dean0x7d>`_ and
-  `@speth (Ray Speth) <https://github.com/speth>`_.
-
-* Reduced compile time
-  (`#243 <https://github.com/fmtlib/fmt/pull/243>`_,
-  `#249 <https://github.com/fmtlib/fmt/pull/249>`_,
-  `#317 <https://github.com/fmtlib/fmt/issues/317>`_):
-
-  .. image:: https://cloud.githubusercontent.com/assets/4831417/11614060/
-             b9e826d2-9c36-11e5-8666-d4131bf503ef.png
-
-  .. image:: https://cloud.githubusercontent.com/assets/4831417/11614080/
-             6ac903cc-9c37-11e5-8165-26df6efae364.png
-
-  Thanks to `@dean0x7d (Dean Moldovan) <https://github.com/dean0x7d>`_.
-
-* Compile test fixes (`#313 <https://github.com/fmtlib/fmt/pull/313>`_).
-  Thanks to `@dean0x7d (Dean Moldovan) <https://github.com/dean0x7d>`_.
-
-* Documentation fixes (`#239 <https://github.com/fmtlib/fmt/pull/239>`_,
-  `#248 <https://github.com/fmtlib/fmt/issues/248>`_,
-  `#252 <https://github.com/fmtlib/fmt/issues/252>`_,
-  `#258 <https://github.com/fmtlib/fmt/pull/258>`_,
-  `#260 <https://github.com/fmtlib/fmt/issues/260>`_,
-  `#301 <https://github.com/fmtlib/fmt/issues/301>`_,
-  `#309 <https://github.com/fmtlib/fmt/pull/309>`_).
-  Thanks to `@ReadmeCritic <https://github.com/ReadmeCritic>`_
-  `@Gachapen (Magnus Bjerke Vik) <https://github.com/Gachapen>`_ and
-  `@jwilk (Jakub Wilk) <https://github.com/jwilk>`_.
-
-* Fixed compiler and sanitizer warnings
-  (`#244 <https://github.com/fmtlib/fmt/issues/244>`_,
-  `#256 <https://github.com/fmtlib/fmt/pull/256>`_,
-  `#259 <https://github.com/fmtlib/fmt/pull/259>`_,
-  `#263 <https://github.com/fmtlib/fmt/issues/263>`_,
-  `#274 <https://github.com/fmtlib/fmt/issues/274>`_,
-  `#277 <https://github.com/fmtlib/fmt/pull/277>`_,
-  `#286 <https://github.com/fmtlib/fmt/pull/286>`_,
-  `#291 <https://github.com/fmtlib/fmt/issues/291>`_,
-  `#296 <https://github.com/fmtlib/fmt/issues/296>`_,
-  `#308 <https://github.com/fmtlib/fmt/issues/308>`_)
-  Thanks to `@mwinterb <https://github.com/mwinterb>`_,
-  `@pweiskircher (Patrik Weiskircher) <https://github.com/pweiskircher>`_,
-  `@Naios <https://github.com/Naios>`_.
-
-* Improved compatibility with Windows Store apps
-  (`#280 <https://github.com/fmtlib/fmt/issues/280>`_,
-  `#285 <https://github.com/fmtlib/fmt/pull/285>`_)
-  Thanks to `@mwinterb <https://github.com/mwinterb>`_.
-
-* Added tests of compatibility with older C++ standards
-  (`#273 <https://github.com/fmtlib/fmt/pull/273>`_).
-  Thanks to `@niosHD <https://github.com/niosHD>`_.
-
-* Fixed Android build (`#271 <https://github.com/fmtlib/fmt/pull/271>`_).
-  Thanks to `@newnon <https://github.com/newnon>`_.
-
-* Changed ``ArgMap`` to be backed by a vector instead of a map.
-  (`#261 <https://github.com/fmtlib/fmt/issues/261>`_,
-  `#262 <https://github.com/fmtlib/fmt/pull/262>`_).
-  Thanks to `@mwinterb <https://github.com/mwinterb>`_.
-
-* Added ``fprintf`` overload that writes to a ``std::ostream``
-  (`#251 <https://github.com/fmtlib/fmt/pull/251>`_).
-  Thanks to `nickhutchinson (Nicholas Hutchinson) <https://github.com/nickhutchinson>`_.
-
-* Export symbols when building a Windows DLL
-  (`#245 <https://github.com/fmtlib/fmt/pull/245>`_).
-  Thanks to `macdems (Maciek Dems) <https://github.com/macdems>`_.
-
-* Fixed compilation on Cygwin (`#304 <https://github.com/fmtlib/fmt/issues/304>`_).
-
-* Implemented a workaround for a bug in Apple LLVM version 4.2 of clang
-  (`#276 <https://github.com/fmtlib/fmt/issues/276>`_).
-
-* Implemented a workaround for Google Test bug
-  `#705 <https://github.com/google/googletest/issues/705>`_ on gcc 6
-  (`#268 <https://github.com/fmtlib/fmt/issues/268>`_).
-  Thanks to `octoploid <https://github.com/octoploid>`_.
-
-* Removed Biicode support because the latter has been discontinued.
-
-2.1.1 - 2016-04-11
-------------------
-
-* The install location for generated CMake files is now configurable via
-  the ``FMT_CMAKE_DIR`` CMake variable
-  (`#299 <https://github.com/fmtlib/fmt/pull/299>`_).
-  Thanks to `@niosHD <https://github.com/niosHD>`_.
-
-* Documentation fixes (`#252 <https://github.com/fmtlib/fmt/issues/252>`_).
-
-2.1.0 - 2016-03-21
-------------------
-
-* Project layout and build system improvements
-  (`#267 <https://github.com/fmtlib/fmt/pull/267>`_):
-
-  * The code have been moved to the ``cppformat`` directory.
-    Including ``format.h`` from the top-level directory is deprecated
-    but works via a proxy header which will be removed in the next
-    major version.
-
-  * C++ Format CMake targets now have proper interface definitions.
-
-  * Installed version of the library now supports the header-only
-    configuration.
-
-  * Targets ``doc``, ``install``, and ``test`` are now disabled if C++ Format
-    is included as a CMake subproject. They can be enabled by setting
-    ``FMT_DOC``, ``FMT_INSTALL``, and ``FMT_TEST`` in the parent project.
-
-  Thanks to `@niosHD <https://github.com/niosHD>`_.
-
-2.0.1 - 2016-03-13
-------------------
-
-* Improved CMake find and package support
-  (`#264 <https://github.com/fmtlib/fmt/issues/264>`_).
-  Thanks to `@niosHD <https://github.com/niosHD>`_.
-
-* Fix compile error with Android NDK and mingw32
-  (`#241 <https://github.com/fmtlib/fmt/issues/241>`_).
-  Thanks to `@Gachapen (Magnus Bjerke Vik) <https://github.com/Gachapen>`_.
-
-* Documentation fixes
-  (`#248 <https://github.com/fmtlib/fmt/issues/248>`_,
-  `#260 <https://github.com/fmtlib/fmt/issues/260>`_).
-
-2.0.0 - 2015-12-01
-------------------
-
-General
-~~~~~~~
-
-* [Breaking] Named arguments
-  (`#169 <https://github.com/fmtlib/fmt/pull/169>`_,
-  `#173 <https://github.com/fmtlib/fmt/pull/173>`_,
-  `#174 <https://github.com/fmtlib/fmt/pull/174>`_):
-
-  .. code:: c++
-
-    fmt::print("The answer is {answer}.", fmt::arg("answer", 42));
-
-  Thanks to `@jamboree <https://github.com/jamboree>`_.
-
-* [Experimental] User-defined literals for format and named arguments
-  (`#204 <https://github.com/fmtlib/fmt/pull/204>`_,
-  `#206 <https://github.com/fmtlib/fmt/pull/206>`_,
-  `#207 <https://github.com/fmtlib/fmt/pull/207>`_):
-
-  .. code:: c++
-
-    using namespace fmt::literals;
-    fmt::print("The answer is {answer}.", "answer"_a=42);
-
-  Thanks to `@dean0x7d (Dean Moldovan) <https://github.com/dean0x7d>`_.
-
-* [Breaking] Formatting of more than 16 arguments is now supported when using
-  variadic templates
-  (`#141 <https://github.com/fmtlib/fmt/issues/141>`_).
-  Thanks to `@Shauren <https://github.com/Shauren>`_.
-
-* Runtime width specification
-  (`#168 <https://github.com/fmtlib/fmt/pull/168>`_):
-
-  .. code:: c++
-
-    fmt::format("{0:{1}}", 42, 5); // gives "   42"
-
-  Thanks to `@jamboree <https://github.com/jamboree>`_.
-
-* [Breaking] Enums are now formatted with an overloaded ``std::ostream`` insertion
-  operator (``operator<<``) if available
-  (`#232 <https://github.com/fmtlib/fmt/issues/232>`_).
-
-* [Breaking] Changed default ``bool`` format to textual, "true" or "false"
-  (`#170 <https://github.com/fmtlib/fmt/issues/170>`_):
-
-  .. code:: c++
-  
-    fmt::print("{}", true); // prints "true"
-
-  To print ``bool`` as a number use numeric format specifier such as ``d``:
-
-  .. code:: c++
-
-    fmt::print("{:d}", true); // prints "1"
-
-* ``fmt::printf`` and ``fmt::sprintf`` now support formatting of ``bool`` with the
-  ``%s`` specifier giving textual output, "true" or "false"
-  (`#223 <https://github.com/fmtlib/fmt/pull/223>`_):
-
-  .. code:: c++
-
-    fmt::printf("%s", true); // prints "true"
-
-  Thanks to `@LarsGullik <https://github.com/LarsGullik>`_.
-
-* [Breaking] ``signed char`` and ``unsigned char`` are now formatted as integers by default
-  (`#217 <https://github.com/fmtlib/fmt/pull/217>`_).
-
-* [Breaking] Pointers to C strings can now be formatted with the ``p`` specifier
-  (`#223 <https://github.com/fmtlib/fmt/pull/223>`_):
-
-  .. code:: c++
-
-    fmt::print("{:p}", "test"); // prints pointer value
-
-  Thanks to `@LarsGullik <https://github.com/LarsGullik>`_.
-
-* [Breaking] ``fmt::printf`` and ``fmt::sprintf`` now print null pointers as ``(nil)``
-  and null strings as ``(null)`` for consistency with glibc
-  (`#226 <https://github.com/fmtlib/fmt/pull/226>`_).
-  Thanks to `@LarsGullik <https://github.com/LarsGullik>`_.
-
-* [Breaking] ``fmt::(s)printf`` now supports formatting of objects of user-defined types
-  that provide an overloaded ``std::ostream`` insertion operator (``operator<<``)
-  (`#201 <https://github.com/fmtlib/fmt/issues/201>`_):
-
-  .. code:: c++
-
-    fmt::printf("The date is %s", Date(2012, 12, 9));
-
-* [Breaking] The ``Buffer`` template is now part of the public API and can be used
-  to implement custom memory buffers
-  (`#140 <https://github.com/fmtlib/fmt/issues/140>`_).
-  Thanks to `@polyvertex (Jean-Charles Lefebvre) <https://github.com/polyvertex>`_.
-
-* [Breaking] Improved compatibility between ``BasicStringRef`` and
-  `std::experimental::basic_string_view
-  <http://en.cppreference.com/w/cpp/experimental/basic_string_view>`_
-  (`#100 <https://github.com/fmtlib/fmt/issues/100>`_,
-  `#159 <https://github.com/fmtlib/fmt/issues/159>`_,
-  `#183 <https://github.com/fmtlib/fmt/issues/183>`_):
-
-  - Comparison operators now compare string content, not pointers
-  - ``BasicStringRef::c_str`` replaced by ``BasicStringRef::data``
-  - ``BasicStringRef`` is no longer assumed to be null-terminated
-
-  References to null-terminated strings are now represented by a new class,
-  ``BasicCStringRef``.
-
-* Dependency on pthreads introduced by Google Test is now optional
-  (`#185 <https://github.com/fmtlib/fmt/issues/185>`_).
-
-* New CMake options ``FMT_DOC``, ``FMT_INSTALL`` and ``FMT_TEST`` to control
-  generation of ``doc``, ``install`` and ``test`` targets respectively, on by default
-  (`#197 <https://github.com/fmtlib/fmt/issues/197>`_,
-  `#198 <https://github.com/fmtlib/fmt/issues/198>`_,
-  `#200 <https://github.com/fmtlib/fmt/issues/200>`_).
-  Thanks to `@maddinat0r (Alex Martin) <https://github.com/maddinat0r>`_.
-
-* ``noexcept`` is now used when compiling with MSVC2015
-  (`#215 <https://github.com/fmtlib/fmt/pull/215>`_).
-  Thanks to `@dmkrepo (Dmitriy) <https://github.com/dmkrepo>`_.
-
-* Added an option to disable use of ``windows.h`` when ``FMT_USE_WINDOWS_H``
-  is defined as 0 before including ``format.h``
-  (`#171 <https://github.com/fmtlib/fmt/issues/171>`_).
-  Thanks to `@alfps (Alf P. Steinbach) <https://github.com/alfps>`_.
-
-* [Breaking] ``windows.h`` is now included with ``NOMINMAX`` unless
-  ``FMT_WIN_MINMAX`` is defined. This is done to prevent breaking code using
-  ``std::min`` and ``std::max`` and only affects the header-only configuration
-  (`#152 <https://github.com/fmtlib/fmt/issues/152>`_,
-  `#153 <https://github.com/fmtlib/fmt/pull/153>`_,
-  `#154 <https://github.com/fmtlib/fmt/pull/154>`_).
-  Thanks to `@DevO2012 <https://github.com/DevO2012>`_.
-
-* Improved support for custom character types
-  (`#171 <https://github.com/fmtlib/fmt/issues/171>`_).
-  Thanks to `@alfps (Alf P. Steinbach) <https://github.com/alfps>`_.
-
-* Added an option to disable use of IOStreams when ``FMT_USE_IOSTREAMS``
-  is defined as 0 before including ``format.h``
-  (`#205 <https://github.com/fmtlib/fmt/issues/205>`_,
-  `#208 <https://github.com/fmtlib/fmt/pull/208>`_).
-  Thanks to `@JodiTheTigger <https://github.com/JodiTheTigger>`_.
-
-* Improved detection of ``isnan``, ``isinf`` and ``signbit``.
-
-Optimization
-~~~~~~~~~~~~
-
-* Made formatting of user-defined types more efficient with a custom stream buffer
-  (`#92 <https://github.com/fmtlib/fmt/issues/92>`_,
-  `#230 <https://github.com/fmtlib/fmt/pull/230>`_).
-  Thanks to `@NotImplemented <https://github.com/NotImplemented>`_.
-
-* Further improved performance of ``fmt::Writer`` on integer formatting
-  and fixed a minor regression. Now it is ~7% faster than ``karma::generate``
-  on Karma's benchmark
-  (`#186 <https://github.com/fmtlib/fmt/issues/186>`_).
-
-* [Breaking] Reduced `compiled code size
-  <https://github.com/fmtlib/fmt#compile-time-and-code-bloat>`_
-  (`#143 <https://github.com/fmtlib/fmt/issues/143>`_,
-  `#149 <https://github.com/fmtlib/fmt/pull/149>`_).
-
-Distribution
-~~~~~~~~~~~~
-
-* [Breaking] Headers are now installed in
-  ``${CMAKE_INSTALL_PREFIX}/include/cppformat``
-  (`#178 <https://github.com/fmtlib/fmt/issues/178>`_).
-  Thanks to `@jackyf (Eugene V. Lyubimkin) <https://github.com/jackyf>`_.
-
-* [Breaking] Changed the library name from ``format`` to ``cppformat``
-  for consistency with the project name and to avoid potential conflicts
-  (`#178 <https://github.com/fmtlib/fmt/issues/178>`_).
-  Thanks to `@jackyf (Eugene V. Lyubimkin) <https://github.com/jackyf>`_.
-
-* C++ Format is now available in `Debian <https://www.debian.org/>`_ GNU/Linux
-  (`stretch <https://packages.debian.org/source/stretch/cppformat>`_,
-  `sid <https://packages.debian.org/source/sid/cppformat>`_) and 
-  derived distributions such as
-  `Ubuntu <https://launchpad.net/ubuntu/+source/cppformat>`_ 15.10 and later
-  (`#155 <https://github.com/fmtlib/fmt/issues/155>`_)::
-
-    $ sudo apt-get install libcppformat1-dev
-
-  Thanks to `@jackyf (Eugene V. Lyubimkin) <https://github.com/jackyf>`_.
-
-* `Packages for Fedora and RHEL <https://admin.fedoraproject.org/pkgdb/package/cppformat/>`_
-  are now available. Thanks to Dave Johansen.
-  
-* C++ Format can now be installed via `Homebrew <http://brew.sh/>`_ on OS X
-  (`#157 <https://github.com/fmtlib/fmt/issues/157>`_)::
-
-    $ brew install cppformat
-
-  Thanks to `@ortho <https://github.com/ortho>`_, Anatoliy Bulukin.
-
-Documentation
-~~~~~~~~~~~~~
-
-* Migrated from ReadTheDocs to GitHub Pages for better responsiveness
-  and reliability
-  (`#128 <https://github.com/fmtlib/fmt/issues/128>`_).
-  New documentation address is http://cppformat.github.io/.
-
-
-* Added `Building the documentation
-  <https://fmt.dev/2.0.0/usage.html#building-the-documentation>`_
-  section to the documentation.
-
-* Documentation build script is now compatible with Python 3 and newer pip versions.
-  (`#189 <https://github.com/fmtlib/fmt/pull/189>`_,
-  `#209 <https://github.com/fmtlib/fmt/issues/209>`_).
-  Thanks to `@JodiTheTigger <https://github.com/JodiTheTigger>`_ and
-  `@xentec <https://github.com/xentec>`_.
-  
-* Documentation fixes and improvements
-  (`#36 <https://github.com/fmtlib/fmt/issues/36>`_,
-  `#75 <https://github.com/fmtlib/fmt/issues/75>`_,
-  `#125 <https://github.com/fmtlib/fmt/issues/125>`_,
-  `#160 <https://github.com/fmtlib/fmt/pull/160>`_,
-  `#161 <https://github.com/fmtlib/fmt/pull/161>`_,
-  `#162 <https://github.com/fmtlib/fmt/issues/162>`_,
-  `#165 <https://github.com/fmtlib/fmt/issues/165>`_,
-  `#210 <https://github.com/fmtlib/fmt/issues/210>`_).
-  Thanks to `@syohex (Syohei YOSHIDA) <https://github.com/syohex>`_ and
-  bug reporters.
-
-* Fixed out-of-tree documentation build
-  (`#177 <https://github.com/fmtlib/fmt/issues/177>`_).
-  Thanks to `@jackyf (Eugene V. Lyubimkin) <https://github.com/jackyf>`_.
-
-Fixes
-~~~~~
-
-* Fixed ``initializer_list`` detection
-  (`#136 <https://github.com/fmtlib/fmt/issues/136>`_).
-  Thanks to `@Gachapen (Magnus Bjerke Vik) <https://github.com/Gachapen>`_.
-
-* [Breaking] Fixed formatting of enums with numeric format specifiers in
-  ``fmt::(s)printf`` 
-  (`#131 <https://github.com/fmtlib/fmt/issues/131>`_,
-  `#139 <https://github.com/fmtlib/fmt/issues/139>`_):
-
-  .. code:: c++
-
-    enum { ANSWER = 42 };
-    fmt::printf("%d", ANSWER);
-
-  Thanks to `@Naios <https://github.com/Naios>`_.
-
-* Improved compatibility with old versions of MinGW
-  (`#129 <https://github.com/fmtlib/fmt/issues/129>`_,
-  `#130 <https://github.com/fmtlib/fmt/pull/130>`_,
-  `#132 <https://github.com/fmtlib/fmt/issues/132>`_).
-  Thanks to `@cstamford (Christopher Stamford) <https://github.com/cstamford>`_.
-
-* Fixed a compile error on MSVC with disabled exceptions
-  (`#144 <https://github.com/fmtlib/fmt/issues/144>`_).
-
-* Added a workaround for broken implementation of variadic templates in MSVC2012
-  (`#148 <https://github.com/fmtlib/fmt/issues/148>`_).
-
-* Placed the anonymous namespace within ``fmt`` namespace for the header-only
-  configuration
-  (`#171 <https://github.com/fmtlib/fmt/issues/171>`_).
-  Thanks to `@alfps (Alf P. Steinbach) <https://github.com/alfps>`_.
-
-* Fixed issues reported by Coverity Scan
-  (`#187 <https://github.com/fmtlib/fmt/issues/187>`_,
-  `#192 <https://github.com/fmtlib/fmt/issues/192>`_).
-
-* Implemented a workaround for a name lookup bug in MSVC2010
-  (`#188 <https://github.com/fmtlib/fmt/issues/188>`_).
-
-* Fixed compiler warnings
-  (`#95 <https://github.com/fmtlib/fmt/issues/95>`_,
-  `#96 <https://github.com/fmtlib/fmt/issues/96>`_,
-  `#114 <https://github.com/fmtlib/fmt/pull/114>`_,
-  `#135 <https://github.com/fmtlib/fmt/issues/135>`_,
-  `#142 <https://github.com/fmtlib/fmt/issues/142>`_,
-  `#145 <https://github.com/fmtlib/fmt/issues/145>`_,
-  `#146 <https://github.com/fmtlib/fmt/issues/146>`_,
-  `#158 <https://github.com/fmtlib/fmt/issues/158>`_,
-  `#163 <https://github.com/fmtlib/fmt/issues/163>`_,
-  `#175 <https://github.com/fmtlib/fmt/issues/175>`_,
-  `#190 <https://github.com/fmtlib/fmt/issues/190>`_,
-  `#191 <https://github.com/fmtlib/fmt/pull/191>`_,
-  `#194 <https://github.com/fmtlib/fmt/issues/194>`_,
-  `#196 <https://github.com/fmtlib/fmt/pull/196>`_,
-  `#216 <https://github.com/fmtlib/fmt/issues/216>`_,
-  `#218 <https://github.com/fmtlib/fmt/pull/218>`_,
-  `#220 <https://github.com/fmtlib/fmt/pull/220>`_,
-  `#229 <https://github.com/fmtlib/fmt/pull/229>`_,
-  `#233 <https://github.com/fmtlib/fmt/issues/233>`_,
-  `#234 <https://github.com/fmtlib/fmt/issues/234>`_,
-  `#236 <https://github.com/fmtlib/fmt/pull/236>`_,
-  `#281 <https://github.com/fmtlib/fmt/issues/281>`_,
-  `#289 <https://github.com/fmtlib/fmt/issues/289>`_).
-  Thanks to `@seanmiddleditch (Sean Middleditch) <https://github.com/seanmiddleditch>`_,
-  `@dixlorenz (Dix Lorenz) <https://github.com/dixlorenz>`_,
-  `@CarterLi (李通洲) <https://github.com/CarterLi>`_,
-  `@Naios <https://github.com/Naios>`_,
-  `@fmatthew5876 (Matthew Fioravante) <https://github.com/fmatthew5876>`_,
-  `@LevskiWeng (Levski Weng) <https://github.com/LevskiWeng>`_,
-  `@rpopescu <https://github.com/rpopescu>`_,
-  `@gabime (Gabi Melman) <https://github.com/gabime>`_,
-  `@cubicool (Jeremy Moles) <https://github.com/cubicool>`_,
-  `@jkflying (Julian Kent) <https://github.com/jkflying>`_,
-  `@LogicalKnight (Sean L) <https://github.com/LogicalKnight>`_,
-  `@inguin (Ingo van Lil) <https://github.com/inguin>`_ and
-  `@Jopie64 (Johan) <https://github.com/Jopie64>`_.
-
-* Fixed portability issues (mostly causing test failures) on ARM, ppc64, ppc64le,
-  s390x and SunOS 5.11 i386
-  (`#138 <https://github.com/fmtlib/fmt/issues/138>`_,
-  `#179 <https://github.com/fmtlib/fmt/issues/179>`_,
-  `#180 <https://github.com/fmtlib/fmt/issues/180>`_,
-  `#202 <https://github.com/fmtlib/fmt/issues/202>`_,
-  `#225 <https://github.com/fmtlib/fmt/issues/225>`_,
-  `Red Hat Bugzilla Bug 1260297 <https://bugzilla.redhat.com/show_bug.cgi?id=1260297>`_).
-  Thanks to `@Naios <https://github.com/Naios>`_,
-  `@jackyf (Eugene V. Lyubimkin) <https://github.com/jackyf>`_ and Dave Johansen.
-
-* Fixed a name conflict with macro ``free`` defined in
-  ``crtdbg.h`` when ``_CRTDBG_MAP_ALLOC`` is set
-  (`#211 <https://github.com/fmtlib/fmt/issues/211>`_).
-
-* Fixed shared library build on OS X
-  (`#212 <https://github.com/fmtlib/fmt/pull/212>`_).
-  Thanks to `@dean0x7d (Dean Moldovan) <https://github.com/dean0x7d>`_.
-
-* Fixed an overload conflict on MSVC when ``/Zc:wchar_t-`` option is specified
-  (`#214 <https://github.com/fmtlib/fmt/pull/214>`_).
-  Thanks to `@slavanap (Vyacheslav Napadovsky) <https://github.com/slavanap>`_.
-
-* Improved compatibility with MSVC 2008
-  (`#236 <https://github.com/fmtlib/fmt/pull/236>`_).
-  Thanks to `@Jopie64 (Johan) <https://github.com/Jopie64>`_.
-
-* Improved compatibility with bcc32
-  (`#227 <https://github.com/fmtlib/fmt/issues/227>`_).
-
-* Fixed ``static_assert`` detection on Clang
-  (`#228 <https://github.com/fmtlib/fmt/pull/228>`_).
-  Thanks to `@dean0x7d (Dean Moldovan) <https://github.com/dean0x7d>`_.
-
-1.1.0 - 2015-03-06
-------------------
-
-* Added ``BasicArrayWriter``, a class template that provides operations for
-  formatting and writing data into a fixed-size array
-  (`#105 <https://github.com/fmtlib/fmt/issues/105>`_ and
-  `#122 <https://github.com/fmtlib/fmt/issues/122>`_):
-
-  .. code:: c++
-  
-    char buffer[100];
-    fmt::ArrayWriter w(buffer);
-    w.write("The answer is {}", 42);
-
-* Added `0 A.D. <http://play0ad.com/>`_ and `PenUltima Online (POL)
-  <http://www.polserver.com/>`_ to the list of notable projects using C++ Format.
-
-* C++ Format now uses MSVC intrinsics for better formatting performance
-  (`#115 <https://github.com/fmtlib/fmt/pull/115>`_,
-  `#116 <https://github.com/fmtlib/fmt/pull/116>`_,
-  `#118 <https://github.com/fmtlib/fmt/pull/118>`_ and
-  `#121 <https://github.com/fmtlib/fmt/pull/121>`_).
-  Previously these optimizations where only used on GCC and Clang.
-  Thanks to `@CarterLi <https://github.com/CarterLi>`_ and
-  `@objectx <https://github.com/objectx>`_.
-
-* CMake install target (`#119 <https://github.com/fmtlib/fmt/pull/119>`_).
-  Thanks to `@TrentHouliston <https://github.com/TrentHouliston>`_.
-
-  You can now install C++ Format with ``make install`` command.
-
-* Improved `Biicode <http://www.biicode.com/>`_ support
-  (`#98 <https://github.com/fmtlib/fmt/pull/98>`_ and
-  `#104 <https://github.com/fmtlib/fmt/pull/104>`_). Thanks to
-  `@MariadeAnton <https://github.com/MariadeAnton>`_ and
-  `@franramirez688 <https://github.com/franramirez688>`_.
-
-* Improved support for building with `Android NDK
-  <https://developer.android.com/tools/sdk/ndk/index.html>`_
-  (`#107 <https://github.com/fmtlib/fmt/pull/107>`_).
-  Thanks to `@newnon <https://github.com/newnon>`_.
-  
-  The `android-ndk-example <https://github.com/fmtlib/android-ndk-example>`_
-  repository provides and example of using C++ Format with Android NDK:
-
-  .. image:: https://raw.githubusercontent.com/fmtlib/android-ndk-example/
-            master/screenshot.png
-
-* Improved documentation of ``SystemError`` and ``WindowsError``
-  (`#54 <https://github.com/fmtlib/fmt/issues/54>`_).
-
-* Various code improvements
-  (`#110 <https://github.com/fmtlib/fmt/pull/110>`_,
-  `#111 <https://github.com/fmtlib/fmt/pull/111>`_
-  `#112 <https://github.com/fmtlib/fmt/pull/112>`_).
-  Thanks to `@CarterLi <https://github.com/CarterLi>`_.
-
-* Improved compile-time errors when formatting wide into narrow strings
-  (`#117 <https://github.com/fmtlib/fmt/issues/117>`_).
-
-* Fixed ``BasicWriter::write`` without formatting arguments when C++11 support
-  is disabled (`#109 <https://github.com/fmtlib/fmt/issues/109>`_).
-
-* Fixed header-only build on OS X with GCC 4.9
-  (`#124 <https://github.com/fmtlib/fmt/issues/124>`_).
-
-* Fixed packaging issues (`#94 <https://github.com/fmtlib/fmt/issues/94>`_).
-
-* Added `changelog <https://github.com/fmtlib/fmt/blob/master/ChangeLog.rst>`_
-  (`#103 <https://github.com/fmtlib/fmt/issues/103>`_).
-
-1.0.0 - 2015-02-05
-------------------
-
-* Add support for a header-only configuration when ``FMT_HEADER_ONLY`` is
-  defined before including ``format.h``:
-
-  .. code:: c++
-
-    #define FMT_HEADER_ONLY
-    #include "format.h"
-
-* Compute string length in the constructor of ``BasicStringRef``
-  instead of the ``size`` method
-  (`#79 <https://github.com/fmtlib/fmt/issues/79>`_).
-  This eliminates size computation for string literals on reasonable optimizing
-  compilers.
-
-* Fix formatting of types with overloaded ``operator <<`` for ``std::wostream``
-  (`#86 <https://github.com/fmtlib/fmt/issues/86>`_):
-
-  .. code:: c++
-
-    fmt::format(L"The date is {0}", Date(2012, 12, 9));
-
-* Fix linkage of tests on Arch Linux
-  (`#89 <https://github.com/fmtlib/fmt/issues/89>`_).
-
-* Allow precision specifier for non-float arguments
-  (`#90 <https://github.com/fmtlib/fmt/issues/90>`_):
-
-  .. code:: c++
-
-    fmt::print("{:.3}\n", "Carpet"); // prints "Car"
-
-* Fix build on Android NDK
-  (`#93 <https://github.com/fmtlib/fmt/issues/93>`_)
-
-* Improvements to documentation build procedure.
-
-* Remove ``FMT_SHARED`` CMake variable in favor of standard `BUILD_SHARED_LIBS
-  <http://www.cmake.org/cmake/help/v3.0/variable/BUILD_SHARED_LIBS.html>`_.
-
-* Fix error handling in ``fmt::fprintf``.
-
-* Fix a number of warnings.
-
-0.12.0 - 2014-10-25
--------------------
-
-* [Breaking] Improved separation between formatting and buffer management.
-  ``Writer`` is now a base class that cannot be instantiated directly.
-  The new ``MemoryWriter`` class implements the default buffer management
-  with small allocations done on stack. So ``fmt::Writer`` should be replaced
-  with ``fmt::MemoryWriter`` in variable declarations.
-
-  Old code:
-
-  .. code:: c++
-
-    fmt::Writer w;
-
-  New code: 
-
-  .. code:: c++
-
-    fmt::MemoryWriter w;
-
-  If you pass ``fmt::Writer`` by reference, you can continue to do so:
-
-  .. code:: c++
-
-      void f(fmt::Writer &w);
-
-  This doesn't affect the formatting API.
-
-* Support for custom memory allocators
-  (`#69 <https://github.com/fmtlib/fmt/issues/69>`_)
-
-* Formatting functions now accept `signed char` and `unsigned char` strings as
-  arguments (`#73 <https://github.com/fmtlib/fmt/issues/73>`_):
-
-  .. code:: c++
-
-    auto s = format("GLSL version: {}", glGetString(GL_VERSION));
-
-* Reduced code bloat. According to the new `benchmark results
-  <https://github.com/fmtlib/fmt#compile-time-and-code-bloat>`_,
-  cppformat is close to ``printf`` and by the order of magnitude better than
-  Boost Format in terms of compiled code size.
-
-* Improved appearance of the documentation on mobile by using the `Sphinx
-  Bootstrap theme <http://ryan-roemer.github.io/sphinx-bootstrap-theme/>`_:
-
-  .. |old| image:: https://cloud.githubusercontent.com/assets/576385/4792130/
-                   cd256436-5de3-11e4-9a62-c077d0c2b003.png
-
-  .. |new| image:: https://cloud.githubusercontent.com/assets/576385/4792131/
-                   cd29896c-5de3-11e4-8f59-cac952942bf0.png
-  
-  +-------+-------+
-  |  Old  |  New  |
-  +-------+-------+
-  | |old| | |new| |
-  +-------+-------+
-
-0.11.0 - 2014-08-21
--------------------
-
-* Safe printf implementation with a POSIX extension for positional arguments:
-
-  .. code:: c++
-
-    fmt::printf("Elapsed time: %.2f seconds", 1.23);
-    fmt::printf("%1$s, %3$d %2$s", weekday, month, day);
-
-* Arguments of ``char`` type can now be formatted as integers
-  (Issue `#55 <https://github.com/fmtlib/fmt/issues/55>`_):
-
-  .. code:: c++
-
-    fmt::format("0x{0:02X}", 'a');
-
-* Deprecated parts of the API removed.
-
-* The library is now built and tested on MinGW with Appveyor in addition to
-  existing test platforms Linux/GCC, OS X/Clang, Windows/MSVC.
-
-0.10.0 - 2014-07-01
--------------------
-
-**Improved API**
-
-* All formatting methods are now implemented as variadic functions instead
-  of using ``operator<<`` for feeding arbitrary arguments into a temporary
-  formatter object. This works both with C++11 where variadic templates are
-  used and with older standards where variadic functions are emulated by
-  providing lightweight wrapper functions defined with the ``FMT_VARIADIC``
-  macro. You can use this macro for defining your own portable variadic
-  functions:
-
-  .. code:: c++
-
-    void report_error(const char *format, const fmt::ArgList &args) {
-      fmt::print("Error: {}");
-      fmt::print(format, args);
-    }
-    FMT_VARIADIC(void, report_error, const char *)
-
-    report_error("file not found: {}", path);
-
-  Apart from a more natural syntax, this also improves performance as there
-  is no need to construct temporary formatter objects and control arguments'
-  lifetimes. Because the wrapper functions are very lightweight, this doesn't
-  cause code bloat even in pre-C++11 mode.
-
-* Simplified common case of formatting an ``std::string``. Now it requires a
-  single function call:
-
-  .. code:: c++
-
-    std::string s = format("The answer is {}.", 42);
-
-  Previously it required 2 function calls:
-
-  .. code:: c++
-
-    std::string s = str(Format("The answer is {}.") << 42);
-
-  Instead of unsafe ``c_str`` function, ``fmt::Writer`` should be used directly
-  to bypass creation of ``std::string``:
-
-  .. code:: c++
-
-    fmt::Writer w;
-    w.write("The answer is {}.", 42);
-    w.c_str();  // returns a C string
-
-  This doesn't do dynamic memory allocation for small strings and is less error
-  prone as the lifetime of the string is the same as for ``std::string::c_str``
-  which is well understood (hopefully).
-
-* Improved consistency in naming functions that are a part of the public API.
-  Now all public functions are lowercase following the standard library
-  conventions. Previously it was a combination of lowercase and
-  CapitalizedWords.
-  Issue `#50 <https://github.com/fmtlib/fmt/issues/50>`_.
-
-* Old functions are marked as deprecated and will be removed in the next
-  release.
-
-**Other Changes**
-
-* Experimental support for printf format specifications (work in progress):
-
-  .. code:: c++
-
-    fmt::printf("The answer is %d.", 42);
-    std::string s = fmt::sprintf("Look, a %s!", "string");
-
-* Support for hexadecimal floating point format specifiers ``a`` and ``A``:
-
-  .. code:: c++
-
-    print("{:a}", -42.0); // Prints -0x1.5p+5
-    print("{:A}", -42.0); // Prints -0X1.5P+5
-
-* CMake option ``FMT_SHARED`` that specifies whether to build format as a
-  shared library (off by default).
-
-0.9.0 - 2014-05-13
-------------------
-
-* More efficient implementation of variadic formatting functions.
-
-* ``Writer::Format`` now has a variadic overload:
-
-  .. code:: c++
-
-    Writer out;
-    out.Format("Look, I'm {}!", "variadic");
-
-* For efficiency and consistency with other overloads, variadic overload of
-  the ``Format`` function now returns ``Writer`` instead of ``std::string``.
-  Use the ``str`` function to convert it to ``std::string``:
-
-  .. code:: c++
-
-    std::string s = str(Format("Look, I'm {}!", "variadic"));
-
-* Replaced formatter actions with output sinks: ``NoAction`` -> ``NullSink``,
-  ``Write`` -> ``FileSink``, ``ColorWriter`` -> ``ANSITerminalSink``.
-  This improves naming consistency and shouldn't affect client code unless
-  these classes are used directly which should be rarely needed.
-
-* Added ``ThrowSystemError`` function that formats a message and throws
-  ``SystemError`` containing the formatted message and system-specific error
-  description. For example, the following code
-
-  .. code:: c++
-
-    FILE *f = fopen(filename, "r");
-    if (!f)
-      ThrowSystemError(errno, "Failed to open file '{}'") << filename;
-
-  will throw ``SystemError`` exception with description
-  "Failed to open file '<filename>': No such file or directory" if file
-  doesn't exist.
-
-* Support for AppVeyor continuous integration platform.
-
-* ``Format`` now throws ``SystemError`` in case of I/O errors.
-
-* Improve test infrastructure. Print functions are now tested by redirecting
-  the output to a pipe.
-
-0.8.0 - 2014-04-14
-------------------
-
-* Initial release
diff --git a/3rdparty/fmt/LICENSE.rst b/3rdparty/fmt/LICENSE.rst
deleted file mode 100644
index f0ec3db4..00000000
--- a/3rdparty/fmt/LICENSE.rst
+++ /dev/null
@@ -1,27 +0,0 @@
-Copyright (c) 2012 - present, Victor Zverovich
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
---- Optional exception to the license ---
-
-As an exception, if, as a result of your compiling your source code, portions
-of this Software are embedded into a machine-executable object form of such
-source code, you may redistribute such embedded portions in such object form
-without including the above copyright and permission notices.
diff --git a/3rdparty/fmt/README.rst b/3rdparty/fmt/README.rst
deleted file mode 100644
index 394f28d9..00000000
--- a/3rdparty/fmt/README.rst
+++ /dev/null
@@ -1,528 +0,0 @@
-{fmt}
-=====
-
-.. image:: https://github.com/fmtlib/fmt/workflows/linux/badge.svg
-   :target: https://github.com/fmtlib/fmt/actions?query=workflow%3Alinux
-
-.. image:: https://github.com/fmtlib/fmt/workflows/macos/badge.svg
-   :target: https://github.com/fmtlib/fmt/actions?query=workflow%3Amacos
-
-.. image:: https://github.com/fmtlib/fmt/workflows/windows/badge.svg
-   :target: https://github.com/fmtlib/fmt/actions?query=workflow%3Awindows
-
-.. image:: https://ci.appveyor.com/api/projects/status/ehjkiefde6gucy1v?svg=true
-   :target: https://ci.appveyor.com/project/vitaut/fmt
-
-.. image:: https://oss-fuzz-build-logs.storage.googleapis.com/badges/fmt.svg
-   :alt: fmt is continuously fuzzed at oss-fuzz
-   :target: https://bugs.chromium.org/p/oss-fuzz/issues/list?\
-            colspec=ID%20Type%20Component%20Status%20Proj%20Reported%20Owner%20\
-            Summary&q=proj%3Dfmt&can=1
-
-.. image:: https://img.shields.io/badge/stackoverflow-fmt-blue.svg
-   :alt: Ask questions at StackOverflow with the tag fmt
-   :target: https://stackoverflow.com/questions/tagged/fmt
-
-**{fmt}** is an open-source formatting library providing a fast and safe
-alternative to C stdio and C++ iostreams.
-
-If you like this project, please consider donating to the BYSOL
-Foundation that helps victims of political repressions in Belarus:
-https://bysol.org/en/bs/general/.
-
-`Documentation <https://fmt.dev>`__
-
-Q&A: ask questions on `StackOverflow with the tag fmt
-<https://stackoverflow.com/questions/tagged/fmt>`_.
-
-Try {fmt} in `Compiler Explorer <https://godbolt.org/z/Eq5763>`_.
-
-Features
---------
-
-* Simple `format API <https://fmt.dev/latest/api.html>`_ with positional arguments
-  for localization
-* Implementation of `C++20 std::format
-  <https://en.cppreference.com/w/cpp/utility/format>`__
-* `Format string syntax <https://fmt.dev/latest/syntax.html>`_ similar to Python's
-  `format <https://docs.python.org/3/library/stdtypes.html#str.format>`_
-* Fast IEEE 754 floating-point formatter with correct rounding, shortness and
-  round-trip guarantees
-* Safe `printf implementation
-  <https://fmt.dev/latest/api.html#printf-formatting>`_ including the POSIX
-  extension for positional arguments
-* Extensibility: `support for user-defined types
-  <https://fmt.dev/latest/api.html#formatting-user-defined-types>`_
-* High performance: faster than common standard library implementations of
-  ``(s)printf``, iostreams, ``to_string`` and ``to_chars``, see `Speed tests`_
-  and `Converting a hundred million integers to strings per second
-  <http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html>`_
-* Small code size both in terms of source code with the minimum configuration
-  consisting of just three files, ``core.h``, ``format.h`` and ``format-inl.h``,
-  and compiled code; see `Compile time and code bloat`_
-* Reliability: the library has an extensive set of `tests
-  <https://github.com/fmtlib/fmt/tree/master/test>`_ and is `continuously fuzzed
-  <https://bugs.chromium.org/p/oss-fuzz/issues/list?colspec=ID%20Type%20
-  Component%20Status%20Proj%20Reported%20Owner%20Summary&q=proj%3Dfmt&can=1>`_
-* Safety: the library is fully type safe, errors in format strings can be
-  reported at compile time, automatic memory management prevents buffer overflow
-  errors
-* Ease of use: small self-contained code base, no external dependencies,
-  permissive MIT `license
-  <https://github.com/fmtlib/fmt/blob/master/LICENSE.rst>`_
-* `Portability <https://fmt.dev/latest/index.html#portability>`_ with
-  consistent output across platforms and support for older compilers
-* Clean warning-free codebase even on high warning levels such as
-  ``-Wall -Wextra -pedantic``
-* Locale-independence by default
-* Optional header-only configuration enabled with the ``FMT_HEADER_ONLY`` macro
-
-See the `documentation <https://fmt.dev>`_ for more details.
-
-Examples
---------
-
-**Print to stdout** (`run <https://godbolt.org/z/Tevcjh>`_)
-
-.. code:: c++
-
-    #include <fmt/core.h>
-    
-    int main() {
-      fmt::print("Hello, world!\n");
-    }
-
-**Format a string** (`run <https://godbolt.org/z/oK8h33>`_)
-
-.. code:: c++
-
-    std::string s = fmt::format("The answer is {}.", 42);
-    // s == "The answer is 42."
-
-**Format a string using positional arguments** (`run <https://godbolt.org/z/Yn7Txe>`_)
-
-.. code:: c++
-
-    std::string s = fmt::format("I'd rather be {1} than {0}.", "right", "happy");
-    // s == "I'd rather be happy than right."
-
-**Print chrono durations** (`run <https://godbolt.org/z/K8s4Mc>`_)
-
-.. code:: c++
-
-    #include <fmt/chrono.h>
-
-    int main() {
-      using namespace std::literals::chrono_literals;
-      fmt::print("Default format: {} {}\n", 42s, 100ms);
-      fmt::print("strftime-like format: {:%H:%M:%S}\n", 3h + 15min + 30s);
-    }
-
-Output::
-
-    Default format: 42s 100ms
-    strftime-like format: 03:15:30
-
-**Print a container** (`run <https://godbolt.org/z/MjsY7c>`_)
-
-.. code:: c++
-
-    #include <vector>
-    #include <fmt/ranges.h>
-
-    int main() {
-      std::vector<int> v = {1, 2, 3};
-      fmt::print("{}\n", v);
-    }
-
-Output::
-
-    [1, 2, 3]
-
-**Check a format string at compile time**
-
-.. code:: c++
-
-    std::string s = fmt::format("{:d}", "I am not a number");
-
-This gives a compile-time error in C++20 because ``d`` is an invalid format
-specifier for a string.
-
-**Write a file from a single thread**
-
-.. code:: c++
-
-    #include <fmt/os.h>
-
-    int main() {
-      auto out = fmt::output_file("guide.txt");
-      out.print("Don't {}", "Panic");
-    }
-
-This can be `5 to 9 times faster than fprintf
-<http://www.zverovich.net/2020/08/04/optimal-file-buffer-size.html>`_.
-
-**Print with colors and text styles**
-
-.. code:: c++
-
-    #include <fmt/color.h>
-
-    int main() {
-      fmt::print(fg(fmt::color::crimson) | fmt::emphasis::bold,
-                 "Hello, {}!\n", "world");
-      fmt::print(fg(fmt::color::floral_white) | bg(fmt::color::slate_gray) |
-                 fmt::emphasis::underline, "Hello, {}!\n", "мир");
-      fmt::print(fg(fmt::color::steel_blue) | fmt::emphasis::italic,
-                 "Hello, {}!\n", "世界");
-    }
-
-Output on a modern terminal:
-
-.. image:: https://user-images.githubusercontent.com/
-           576385/88485597-d312f600-cf2b-11ea-9cbe-61f535a86e28.png
-
-Benchmarks
-----------
-
-Speed tests
-~~~~~~~~~~~
-
-================= ============= ===========
-Library           Method        Run Time, s
-================= ============= ===========
-libc              printf          1.04
-libc++            std::ostream    3.05
-{fmt} 6.1.1       fmt::print      0.75
-Boost Format 1.67 boost::format   7.24
-Folly Format      folly::format   2.23
-================= ============= ===========
-
-{fmt} is the fastest of the benchmarked methods, ~35% faster than ``printf``.
-
-The above results were generated by building ``tinyformat_test.cpp`` on macOS
-10.14.6 with ``clang++ -O3 -DNDEBUG -DSPEED_TEST -DHAVE_FORMAT``, and taking the
-best of three runs. In the test, the format string ``"%0.10f:%04d:%+g:%s:%p:%c:%%\n"``
-or equivalent is filled 2,000,000 times with output sent to ``/dev/null``; for
-further details refer to the `source
-<https://github.com/fmtlib/format-benchmark/blob/master/src/tinyformat-test.cc>`_.
-
-{fmt} is up to 20-30x faster than ``std::ostringstream`` and ``sprintf`` on
-floating-point formatting (`dtoa-benchmark <https://github.com/fmtlib/dtoa-benchmark>`_)
-and faster than `double-conversion <https://github.com/google/double-conversion>`_ and
-`ryu <https://github.com/ulfjack/ryu>`_:
-
-.. image:: https://user-images.githubusercontent.com/576385/
-           95684665-11719600-0ba8-11eb-8e5b-972ff4e49428.png
-   :target: https://fmt.dev/unknown_mac64_clang12.0.html
-
-Compile time and code bloat
-~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-The script `bloat-test.py
-<https://github.com/fmtlib/format-benchmark/blob/master/bloat-test.py>`_
-from `format-benchmark <https://github.com/fmtlib/format-benchmark>`_
-tests compile time and code bloat for nontrivial projects.
-It generates 100 translation units and uses ``printf()`` or its alternative
-five times in each to simulate a medium sized project.  The resulting
-executable size and compile time (Apple LLVM version 8.1.0 (clang-802.0.42),
-macOS Sierra, best of three) is shown in the following tables.
-
-**Optimized build (-O3)**
-
-============= =============== ==================== ==================
-Method        Compile Time, s Executable size, KiB Stripped size, KiB
-============= =============== ==================== ==================
-printf                    2.6                   29                 26
-printf+string            16.4                   29                 26
-iostreams                31.1                   59                 55
-{fmt}                    19.0                   37                 34
-Boost Format             91.9                  226                203
-Folly Format            115.7                  101                 88
-============= =============== ==================== ==================
-
-As you can see, {fmt} has 60% less overhead in terms of resulting binary code
-size compared to iostreams and comes pretty close to ``printf``. Boost Format
-and Folly Format have the largest overheads.
-
-``printf+string`` is the same as ``printf`` but with extra ``<string>``
-include to measure the overhead of the latter.
-
-**Non-optimized build**
-
-============= =============== ==================== ==================
-Method        Compile Time, s Executable size, KiB Stripped size, KiB
-============= =============== ==================== ==================
-printf                    2.2                   33                 30
-printf+string            16.0                   33                 30
-iostreams                28.3                   56                 52
-{fmt}                    18.2                   59                 50
-Boost Format             54.1                  365                303
-Folly Format             79.9                  445                430
-============= =============== ==================== ==================
-
-``libc``, ``lib(std)c++`` and ``libfmt`` are all linked as shared libraries to
-compare formatting function overhead only. Boost Format is a
-header-only library so it doesn't provide any linkage options.
-
-Running the tests
-~~~~~~~~~~~~~~~~~
-
-Please refer to `Building the library`__ for the instructions on how to build
-the library and run the unit tests.
-
-__ https://fmt.dev/latest/usage.html#building-the-library
-
-Benchmarks reside in a separate repository,
-`format-benchmarks <https://github.com/fmtlib/format-benchmark>`_,
-so to run the benchmarks you first need to clone this repository and
-generate Makefiles with CMake::
-
-    $ git clone --recursive https://github.com/fmtlib/format-benchmark.git
-    $ cd format-benchmark
-    $ cmake .
-
-Then you can run the speed test::
-
-    $ make speed-test
-
-or the bloat test::
-
-    $ make bloat-test
-    
-Migrating code
---------------
-
-`clang-tidy-fmt <https://github.com/mikecrowe/clang-tidy-fmt>`_ provides clang
-tidy checks for converting occurrences of ``printf`` and ``fprintf`` to
-``fmt::print``.
-
-Projects using this library
----------------------------
-
-* `0 A.D. <https://play0ad.com/>`_: a free, open-source, cross-platform
-  real-time strategy game
-
-* `2GIS <https://2gis.ru/>`_: free business listings with a city map
-
-* `AMPL/MP <https://github.com/ampl/mp>`_:
-  an open-source library for mathematical programming
-
-* `Aseprite <https://github.com/aseprite/aseprite>`_:
-  animated sprite editor & pixel art tool 
-
-* `AvioBook <https://www.aviobook.aero/en>`_: a comprehensive aircraft
-  operations suite
-  
-* `Blizzard Battle.net <https://battle.net/>`_: an online gaming platform
-  
-* `Celestia <https://celestia.space/>`_: real-time 3D visualization of space
-
-* `Ceph <https://ceph.com/>`_: a scalable distributed storage system
-
-* `ccache <https://ccache.dev/>`_: a compiler cache
-
-* `ClickHouse <https://github.com/ClickHouse/ClickHouse>`_: analytical database
-  management system
-
-* `CUAUV <https://cuauv.org/>`_: Cornell University's autonomous underwater
-  vehicle
-
-* `Drake <https://drake.mit.edu/>`_: a planning, control, and analysis toolbox
-  for nonlinear dynamical systems (MIT)
-
-* `Envoy <https://lyft.github.io/envoy/>`_: C++ L7 proxy and communication bus
-  (Lyft)
-
-* `FiveM <https://fivem.net/>`_: a modification framework for GTA V
-
-* `fmtlog <https://github.com/MengRao/fmtlog>`_: a performant fmtlib-style
-  logging library with latency in nanoseconds
-
-* `Folly <https://github.com/facebook/folly>`_: Facebook open-source library
-
-* `Grand Mountain Adventure
-  <https://store.steampowered.com/app/1247360/Grand_Mountain_Adventure/>`_:
-  A beautiful open-world ski & snowboarding game
-
-* `HarpyWar/pvpgn <https://github.com/pvpgn/pvpgn-server>`_:
-  Player vs Player Gaming Network with tweaks
-
-* `KBEngine <https://github.com/kbengine/kbengine>`_: an open-source MMOG server
-  engine
-
-* `Keypirinha <https://keypirinha.com/>`_: a semantic launcher for Windows
-
-* `Kodi <https://kodi.tv/>`_ (formerly xbmc): home theater software
-
-* `Knuth <https://kth.cash/>`_: high-performance Bitcoin full-node
-
-* `Microsoft Verona <https://github.com/microsoft/verona>`_:
-  research programming language for concurrent ownership
-
-* `MongoDB <https://mongodb.com/>`_: distributed document database
-
-* `MongoDB Smasher <https://github.com/duckie/mongo_smasher>`_: a small tool to
-  generate randomized datasets
-
-* `OpenSpace <https://openspaceproject.com/>`_: an open-source
-  astrovisualization framework
-
-* `PenUltima Online (POL) <https://www.polserver.com/>`_:
-  an MMO server, compatible with most Ultima Online clients
-
-* `PyTorch <https://github.com/pytorch/pytorch>`_: an open-source machine
-  learning library
-
-* `quasardb <https://www.quasardb.net/>`_: a distributed, high-performance,
-  associative database
-  
-* `Quill <https://github.com/odygrd/quill>`_: asynchronous low-latency logging library
-
-* `QKW <https://github.com/ravijanjam/qkw>`_: generalizing aliasing to simplify
-  navigation, and executing complex multi-line terminal command sequences
-
-* `redis-cerberus <https://github.com/HunanTV/redis-cerberus>`_: a Redis cluster
-  proxy
-
-* `redpanda <https://vectorized.io/redpanda>`_: a 10x faster Kafka® replacement
-  for mission critical systems written in C++
-
-* `rpclib <http://rpclib.net/>`_: a modern C++ msgpack-RPC server and client
-  library
-
-* `Salesforce Analytics Cloud
-  <https://www.salesforce.com/analytics-cloud/overview/>`_:
-  business intelligence software
-
-* `Scylla <https://www.scylladb.com/>`_: a Cassandra-compatible NoSQL data store
-  that can handle 1 million transactions per second on a single server
-
-* `Seastar <http://www.seastar-project.org/>`_: an advanced, open-source C++
-  framework for high-performance server applications on modern hardware
-
-* `spdlog <https://github.com/gabime/spdlog>`_: super fast C++ logging library
-
-* `Stellar <https://www.stellar.org/>`_: financial platform
-
-* `Touch Surgery <https://www.touchsurgery.com/>`_: surgery simulator
-
-* `TrinityCore <https://github.com/TrinityCore/TrinityCore>`_: open-source
-  MMORPG framework
-
-* `Windows Terminal <https://github.com/microsoft/terminal>`_: the new Windows
-  terminal
-
-`More... <https://github.com/search?q=fmtlib&type=Code>`_
-
-If you are aware of other projects using this library, please let me know
-by `email <mailto:victor.zverovich@gmail.com>`_ or by submitting an
-`issue <https://github.com/fmtlib/fmt/issues>`_.
-
-Motivation
-----------
-
-So why yet another formatting library?
-
-There are plenty of methods for doing this task, from standard ones like
-the printf family of function and iostreams to Boost Format and FastFormat
-libraries. The reason for creating a new library is that every existing
-solution that I found either had serious issues or didn't provide
-all the features I needed.
-
-printf
-~~~~~~
-
-The good thing about ``printf`` is that it is pretty fast and readily available
-being a part of the C standard library. The main drawback is that it
-doesn't support user-defined types. ``printf`` also has safety issues although
-they are somewhat mitigated with `__attribute__ ((format (printf, ...))
-<https://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html>`_ in GCC.
-There is a POSIX extension that adds positional arguments required for
-`i18n <https://en.wikipedia.org/wiki/Internationalization_and_localization>`_
-to ``printf`` but it is not a part of C99 and may not be available on some
-platforms.
-
-iostreams
-~~~~~~~~~
-
-The main issue with iostreams is best illustrated with an example:
-
-.. code:: c++
-
-    std::cout << std::setprecision(2) << std::fixed << 1.23456 << "\n";
-
-which is a lot of typing compared to printf:
-
-.. code:: c++
-
-    printf("%.2f\n", 1.23456);
-
-Matthew Wilson, the author of FastFormat, called this "chevron hell". iostreams
-don't support positional arguments by design.
-
-The good part is that iostreams support user-defined types and are safe although
-error handling is awkward.
-
-Boost Format
-~~~~~~~~~~~~
-
-This is a very powerful library which supports both ``printf``-like format
-strings and positional arguments. Its main drawback is performance. According to
-various benchmarks, it is much slower than other methods considered here. Boost
-Format also has excessive build times and severe code bloat issues (see
-`Benchmarks`_).
-
-FastFormat
-~~~~~~~~~~
-
-This is an interesting library which is fast, safe and has positional arguments.
-However, it has significant limitations, citing its author:
-
-    Three features that have no hope of being accommodated within the
-    current design are:
-
-    * Leading zeros (or any other non-space padding)
-    * Octal/hexadecimal encoding
-    * Runtime width/alignment specification
-
-It is also quite big and has a heavy dependency, STLSoft, which might be too
-restrictive for using it in some projects.
-
-Boost Spirit.Karma
-~~~~~~~~~~~~~~~~~~
-
-This is not really a formatting library but I decided to include it here for
-completeness. As iostreams, it suffers from the problem of mixing verbatim text
-with arguments. The library is pretty fast, but slower on integer formatting
-than ``fmt::format_to`` with format string compilation on Karma's own benchmark,
-see `Converting a hundred million integers to strings per second
-<http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html>`_.
-
-License
--------
-
-{fmt} is distributed under the MIT `license
-<https://github.com/fmtlib/fmt/blob/master/LICENSE.rst>`_.
-
-Documentation License
----------------------
-
-The `Format String Syntax <https://fmt.dev/latest/syntax.html>`_
-section in the documentation is based on the one from Python `string module
-documentation <https://docs.python.org/3/library/string.html#module-string>`_.
-For this reason the documentation is distributed under the Python Software
-Foundation license available in `doc/python-license.txt
-<https://raw.github.com/fmtlib/fmt/master/doc/python-license.txt>`_.
-It only applies if you distribute the documentation of {fmt}.
-
-Maintainers
------------
-
-The {fmt} library is maintained by Victor Zverovich (`vitaut
-<https://github.com/vitaut>`_) and Jonathan Müller (`foonathan
-<https://github.com/foonathan>`_) with contributions from many other people.
-See `Contributors <https://github.com/fmtlib/fmt/graphs/contributors>`_ and
-`Releases <https://github.com/fmtlib/fmt/releases>`_ for some of the names.
-Let us know if your contribution is not listed or mentioned incorrectly and
-we'll make it right.
diff --git a/3rdparty/fmt/doc/CMakeLists.txt b/3rdparty/fmt/doc/CMakeLists.txt
deleted file mode 100644
index 06848450..00000000
--- a/3rdparty/fmt/doc/CMakeLists.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-find_program(DOXYGEN doxygen)
-if (NOT DOXYGEN)
-  message(STATUS "Target 'doc' disabled (requires doxygen)")
-  return ()
-endif ()
-
-find_package(PythonInterp QUIET REQUIRED)
-
-add_custom_target(doc
-  COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/build.py
-                               ${FMT_VERSION}
-  SOURCES api.rst syntax.rst usage.rst build.py conf.py _templates/layout.html)
-
-include(GNUInstallDirs)
-install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/html/
-        DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/doc/fmt OPTIONAL
-        PATTERN ".doctrees" EXCLUDE)
diff --git a/3rdparty/fmt/doc/_static/bootstrap.min.js b/3rdparty/fmt/doc/_static/bootstrap.min.js
deleted file mode 100644
index c8f82e59..00000000
--- a/3rdparty/fmt/doc/_static/bootstrap.min.js
+++ /dev/null
@@ -1,7 +0,0 @@
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- * Bootstrap v3.3.4 (http://getbootstrap.com)
- * Copyright 2011-2015 Twitter, Inc.
- * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
- */
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diff --git a/3rdparty/fmt/doc/_templates/layout.html b/3rdparty/fmt/doc/_templates/layout.html
deleted file mode 100644
index 333a606c..00000000
--- a/3rdparty/fmt/doc/_templates/layout.html
+++ /dev/null
@@ -1,148 +0,0 @@
-{% extends "!layout.html" %}
-
-{% block extrahead %}
-<meta name="description" content="Small, safe and fast formatting library">
-<meta name="keywords" content="C++, formatting, printf, string, library">
-<meta name="author" content="Victor Zverovich">
-<link rel="stylesheet" href="_static/fmt.css">
-{# Google Analytics #}
-<script async src="https://www.googletagmanager.com/gtag/js?id=UA-20116650-4"></script>
-<script>
-  window.dataLayer = window.dataLayer || [];
-  function gtag(){dataLayer.push(arguments);}
-  gtag('js', new Date());
-
-  gtag('config', 'UA-20116650-4');
-</script>
-{% endblock %}
-
-{%- macro searchform(classes, button) %}
-<form class="{{classes}}" role="search" action="{{ pathto('search') }}"
-      method="get">
-  <div class="form-group">
-    <input type="text" name="q" class="form-control"
-           {{ 'placeholder="Search"' if not button }} >
-  </div>
-  <input type="hidden" name="check_keywords" value="yes" />
-  <input type="hidden" name="area" value="default" />
-  {% if button %}
-    <input type="submit" class="btn btn-default" value="search">
-  {% endif %}
-</form>
-{%- endmacro %}
-
-{% block header %}
-<nav class="navbar navbar-inverse">
-  <div class="tb-container">
-    <div class="row">
-      <div class="navbar-content">
-        {# Brand and toggle get grouped for better mobile display #}
-        <div class="navbar-header">
-          <button type="button" class="navbar-toggle collapsed"
-                  data-toggle="collapse" data-target=".navbar-collapse">
-            <span class="sr-only">Toggle navigation</span>
-            <span class="icon-bar"></span>
-            <span class="icon-bar"></span>
-            <span class="icon-bar"></span>
-          </button>
-          <a class="navbar-brand" href="index.html">{fmt}</a>
-        </div>
-
-        {# Collect the nav links, forms, and other content for toggling #}
-        <div class="collapse navbar-collapse">
-          <ul class="nav navbar-nav">
-            <li class="dropdown">
-              <a href="#" class="dropdown-toggle" data-toggle="dropdown"
-                 role="button" aria-expanded="false">{{ version }}
-                <span class="caret"></span></a>
-              <ul class="dropdown-menu" role="menu">
-                {% for v in versions.split(',') %}
-                <li><a href="https://fmt.dev/{{v}}">{{v}}</a></li>
-                {% endfor %}
-              </ul>
-            </li>
-            {% for name in ['Contents', 'Usage', 'API', 'Syntax'] %}
-              {% if pagename == name.lower() %}
-              <li class="active"><a href="{{name.lower()}}.html">{{name}}
-                <span class="sr-only">(current)</span></a></li>
-              {%else%}
-              <li><a href="{{name.lower()}}.html">{{name}}</a></li>
-              {%endif%}
-            {% endfor %}
-          </ul>
-          {% if pagename != 'search' %}
-            {{ searchform('navbar-form navbar-right', False) }}
-          {%endif%}
-        </div> {# /.navbar-collapse #}
-      </div> {# /.col-md-offset-2 #}
-    </div> {# /.row #}
-  </div> {# /.tb-container #}
-</nav>
-{% if pagename == "index" %}
-{% set download_url = 'https://github.com/fmtlib/fmt/releases/download' %}
-<div class="jumbotron">
-  <div class="tb-container">
-    <h1>{fmt}</h1>
-    <p class="lead">A modern formatting library</p>
-    <div class="btn-group" role="group">
-      {% set name = 'fmt' if version.split('.')[0]|int >= 3 else 'cppformat' %}
-      <a class="btn btn-success"
-         href="{{download_url}}/{{version}}/{{name}}-{{version}}.zip">
-           <span class="glyphicon glyphicon-download"></span> Download
-      </a>
-      <button type="button" class="btn btn-success dropdown-toggle"
-        data-toggle="dropdown"><span class="caret"></span></button>
-      <ul class="dropdown-menu">
-      {% for v in versions.split(',') %}
-      {% set name = 'fmt' if v.split('.')[0]|int >= 3 else 'cppformat' %}
-        <li><a href="{{download_url}}/{{v}}/{{name}}-{{v}}.zip">Version {{v}}
-          </a></li>
-      {% endfor %}
-      </ul>
-    </div>
-  </div>
-</div>
-{% endif %}
-{% endblock %}
-
-{# Disable relbars. #}
-{% block relbar1 %}
-{% endblock %}
-{% block relbar2 %}
-{% endblock %}
-
-{% block content %}
-<div class="tb-container">
-  <div class="row">
-    {# Sidebar is currently disabled.
-    <div class="bs-sidebar">
-      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
-        <div class="sphinxsidebarwrapper">
-          {%- block sidebarlogo %}
-          {%- if logo %}
-            <p class="logo"><a href="{{ pathto(master_doc) }}">
-              <img class="logo" src="{{ pathto('_static/' + logo, 1) }}"
-                   alt="Logo"/>
-            </a></p>
-          {%- endif %}
-          {%- endblock %}
-          {%- for sidebartemplate in sidebars %}
-          {%- include sidebartemplate %}
-          {%- endfor %}
-        </div>
-      </div>
-    </div>
-    #}
-
-    <div class="content">
-      {% block body %} {% endblock %}
-    </div>
-  </div>
-</div>
-{% endblock %}
-
-{% block footer %}
-{{ super() }}
-{# Placed at the end of the document so the pages load faster. #}
-<script src="_static/bootstrap.min.js"></script>
-{% endblock %}
diff --git a/3rdparty/fmt/doc/_templates/search.html b/3rdparty/fmt/doc/_templates/search.html
deleted file mode 100644
index 488e0b5d..00000000
--- a/3rdparty/fmt/doc/_templates/search.html
+++ /dev/null
@@ -1,55 +0,0 @@
-{#
-    basic/search.html
-    ~~~~~~~~~~~~~~~~~
-
-    Template for the search page.
-
-    :copyright: Copyright 2007-2015 by the Sphinx team, see AUTHORS.
-    :license: BSD, see LICENSE for details.
-#}
-{%- extends "layout.html" %}
-{% set title = _('Search') %}
-{% set script_files = script_files + ['_static/searchtools.js'] %}
-{% block extrahead %}
-  <script type="text/javascript">
-    jQuery(function() { Search.loadIndex("{{ pathto('searchindex.js', 1) }}"); });
-  </script>
-  {# this is used when loading the search index using $.ajax fails,
-     such as on Chrome for documents on localhost #}
-  <script type="text/javascript" id="searchindexloader"></script>
-  {{ super() }}
-{% endblock %}
-{% block body %}
-  <h1 id="search-documentation">{{ _('Search') }}</h1>
-  <div id="fallback" class="admonition warning">
-  <script type="text/javascript">$('#fallback').hide();</script>
-  <p>
-    {% trans %}Please activate JavaScript to enable the search
-    functionality.{% endtrans %}
-  </p>
-  </div>
-  <p>
-    {% trans %}From here you can search these documents. Enter your search
-    words into the box below and click "search". Note that the search
-    function will automatically search for all of the words. Pages
-    containing fewer words won't appear in the result list.{% endtrans %}
-  </p>
-  {{ searchform('form-inline', True) }}
-  {% if search_performed %}
-    <h2>{{ _('Search Results') }}</h2>
-    {% if not search_results %}
-      <p>{{ _('Your search did not match any documents. Please make sure that all words are spelled correctly and that you\'ve selected enough categories.') }}</p>
-    {% endif %}
-  {% endif %}
-  <div id="search-results">
-  {% if search_results %}
-    <ul>
-    {% for href, caption, context in search_results %}
-      <li><a href="{{ pathto(item.href) }}">{{ caption }}</a>
-        <div class="context">{{ context|e }}</div>
-      </li>
-    {% endfor %}
-    </ul>
-  {% endif %}
-  </div>
-{% endblock %}
diff --git a/3rdparty/fmt/doc/api.rst b/3rdparty/fmt/doc/api.rst
deleted file mode 100644
index 93fb3faf..00000000
--- a/3rdparty/fmt/doc/api.rst
+++ /dev/null
@@ -1,556 +0,0 @@
-.. _string-formatting-api:
-
-*************
-API Reference
-*************
-
-The {fmt} library API consists of the following parts:
-
-* :ref:`fmt/core.h <core-api>`: the core API providing main formatting functions
-  for ``char``/UTF-8 with compile-time checks and minimal dependencies
-* :ref:`fmt/format.h <format-api>`: the full format API providing additional
-  formatting functions and locale support
-* :ref:`fmt/ranges.h <ranges-api>`: formatting of ranges and tuples
-* :ref:`fmt/chrono.h <chrono-api>`: date and time formatting
-* :ref:`fmt/compile.h <compile-api>`: format string compilation
-* :ref:`fmt/color.h <color-api>`: terminal color and text style
-* :ref:`fmt/os.h <os-api>`: system APIs
-* :ref:`fmt/ostream.h <ostream-api>`: ``std::ostream`` support
-* :ref:`fmt/printf.h <printf-api>`: ``printf`` formatting
-* :ref:`fmt/xchar.h <xchar-api>`: optional ``wchar_t`` support 
-
-All functions and types provided by the library reside in namespace ``fmt`` and
-macros have prefix ``FMT_``.
-
-.. _core-api:
-
-Core API
-========
-
-``fmt/core.h`` defines the core API which provides main formatting functions for
-``char``/UTF-8 with compile-time checks. It has minimal include dependencies for
-better compile times. This header is only beneficial when using {fmt} as a
-library and not in the header-only mode.
-
-The following functions use :ref:`format string syntax <syntax>`
-similar to that of Python's `str.format
-<https://docs.python.org/3/library/stdtypes.html#str.format>`_.
-They take *fmt* and *args* as arguments.
-
-*fmt* is a format string that contains literal text and replacement fields
-surrounded by braces ``{}``. The fields are replaced with formatted arguments
-in the resulting string. `~fmt::format_string` is a format string which can be
-implicitly constructed from a string literal or a ``constexpr`` string and is
-checked at compile time in C++20. To pass a runtime format string wrap it in
-`fmt::runtime`.
-
-*args* is an argument list representing objects to be formatted.
-
-.. _format:
-
-.. doxygenfunction:: format(format_string<T...> fmt, T&&... args) -> std::string
-.. doxygenfunction:: vformat(string_view fmt, format_args args) -> std::string
-
-.. doxygenfunction:: format_to(OutputIt out, format_string<T...> fmt, T&&... args) -> OutputIt
-.. doxygenfunction:: format_to_n(OutputIt out, size_t n, format_string<T...> fmt, T&&... args) -> format_to_n_result<OutputIt>
-.. doxygenfunction:: formatted_size(format_string<T...> fmt, T&&... args) -> size_t
-
-.. doxygenstruct:: fmt::format_to_n_result
-   :members:
-
-.. _print:
-
-.. doxygenfunction:: fmt::print(format_string<T...> fmt, T&&... args)
-.. doxygenfunction:: fmt::vprint(string_view fmt, format_args args)
-
-.. doxygenfunction:: print(std::FILE *f, format_string<T...> fmt, T&&... args)
-.. doxygenfunction:: vprint(std::FILE *f, string_view fmt, format_args args)
-
-Compile-time Format String Checks
----------------------------------
-
-Compile-time checks are enabled when using ``FMT_STRING``. They support built-in
-and string types as well as user-defined types with ``constexpr`` ``parse``
-functions in their ``formatter`` specializations.
-Requires C++14 and is a no-op in C++11.
-
-.. doxygendefine:: FMT_STRING
-
-To force the use of compile-time checks, define the preprocessor variable
-``FMT_ENFORCE_COMPILE_STRING``. When set, functions accepting ``FMT_STRING``
-will fail to compile with regular strings. Runtime-checked
-formatting is still possible using ``fmt::vformat``, ``fmt::vprint``, etc.
-
-.. doxygenclass:: fmt::basic_format_string
-   :members:
-
-.. doxygentypedef:: fmt::format_string
-
-.. doxygenfunction:: fmt::runtime(const S&)
-
-Named Arguments
----------------
-
-.. doxygenfunction:: fmt::arg(const S&, const T&)
-
-Named arguments are not supported in compile-time checks at the moment.
-
-Argument Lists
---------------
-
-You can create your own formatting function with compile-time checks and small
-binary footprint, for example (https://godbolt.org/z/oba4Mc):
-
-.. code:: c++
-
-    #include <fmt/format.h>
-
-    void vlog(const char* file, int line, fmt::string_view format,
-              fmt::format_args args) {
-      fmt::print("{}: {}: ", file, line);
-      fmt::vprint(format, args);
-    }
-
-    template <typename S, typename... Args>
-    void log(const char* file, int line, const S& format, Args&&... args) {
-      vlog(file, line, format,
-          fmt::make_args_checked<Args...>(format, args...));
-    }
-
-    #define MY_LOG(format, ...) \
-      log(__FILE__, __LINE__, FMT_STRING(format), __VA_ARGS__)
-
-    MY_LOG("invalid squishiness: {}", 42);
-
-Note that ``vlog`` is not parameterized on argument types which improves compile
-times and reduces binary code size compared to a fully parameterized version.
-
-.. doxygenfunction:: fmt::make_args_checked(const S&, const remove_reference_t<Args>&...)
-
-.. doxygenfunction:: fmt::make_format_args(const Args&...)
-
-.. doxygenclass:: fmt::format_arg_store
-   :members:
-
-.. doxygenclass:: fmt::dynamic_format_arg_store
-   :members:
-
-.. doxygenclass:: fmt::basic_format_args
-   :members:
-
-.. doxygentypedef:: fmt::format_args
-
-.. doxygenclass:: fmt::basic_format_arg
-   :members:
-
-.. doxygenclass:: fmt::basic_format_context
-   :members:
-
-.. doxygentypedef:: fmt::format_context
-
-Compatibility
--------------
-
-.. doxygenclass:: fmt::basic_string_view
-   :members:
-
-.. doxygentypedef:: fmt::string_view
-
-Locale
-------
-
-All formatting is locale-independent by default. Use the ``'L'`` format
-specifier to insert the appropriate number separator characters from the
-locale::
-
-  #include <fmt/core.h>
-  #include <locale>
-
-  std::locale::global(std::locale("en_US.UTF-8"));
-  auto s = fmt::format("{:L}", 1000000);  // s == "1,000,000"
-
-.. _format-api:
-
-Format API
-==========
-
-``fmt/format.h`` defines the full format API providing additional formatting
-functions and locale support.
-
-.. _udt:
-
-Formatting User-defined Types
------------------------------
-
-To make a user-defined type formattable, specialize the ``formatter<T>`` struct
-template and implement ``parse`` and ``format`` methods::
-
-  #include <fmt/format.h>
-
-  struct point {
-    double x, y;
-  };
-
-  template <> struct fmt::formatter<point> {
-    // Presentation format: 'f' - fixed, 'e' - exponential.
-    char presentation = 'f';
-
-    // Parses format specifications of the form ['f' | 'e'].
-    constexpr auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
-      // [ctx.begin(), ctx.end()) is a character range that contains a part of
-      // the format string starting from the format specifications to be parsed,
-      // e.g. in
-      //
-      //   fmt::format("{:f} - point of interest", point{1, 2});
-      //
-      // the range will contain "f} - point of interest". The formatter should
-      // parse specifiers until '}' or the end of the range. In this example
-      // the formatter should parse the 'f' specifier and return an iterator
-      // pointing to '}'.
-
-      // Parse the presentation format and store it in the formatter:
-      auto it = ctx.begin(), end = ctx.end();
-      if (it != end && (*it == 'f' || *it == 'e')) presentation = *it++;
-
-      // Check if reached the end of the range:
-      if (it != end && *it != '}') throw format_error("invalid format");
-
-      // Return an iterator past the end of the parsed range:
-      return it;
-    }
-
-    // Formats the point p using the parsed format specification (presentation)
-    // stored in this formatter.
-    template <typename FormatContext>
-    auto format(const point& p, FormatContext& ctx) -> decltype(ctx.out()) {
-      // ctx.out() is an output iterator to write to.
-      return presentation == 'f'
-                ? format_to(ctx.out(), "({:.1f}, {:.1f})", p.x, p.y)
-                : format_to(ctx.out(), "({:.1e}, {:.1e})", p.x, p.y);
-    }
-  };
-
-Then you can pass objects of type ``point`` to any formatting function::
-
-  point p = {1, 2};
-  std::string s = fmt::format("{:f}", p);
-  // s == "(1.0, 2.0)"
-
-You can also reuse existing formatters via inheritance or composition, for
-example::
-
-  enum class color {red, green, blue};
-
-  template <> struct fmt::formatter<color>: formatter<string_view> {
-    // parse is inherited from formatter<string_view>.
-    template <typename FormatContext>
-    auto format(color c, FormatContext& ctx) {
-      string_view name = "unknown";
-      switch (c) {
-      case color::red:   name = "red"; break;
-      case color::green: name = "green"; break;
-      case color::blue:  name = "blue"; break;
-      }
-      return formatter<string_view>::format(name, ctx);
-    }
-  };
-
-Since ``parse`` is inherited from ``formatter<string_view>`` it will recognize
-all string format specifications, for example
-
-.. code-block:: c++
-
-   fmt::format("{:>10}", color::blue)
-
-will return ``"      blue"``.
-
-You can also write a formatter for a hierarchy of classes::
-
-  #include <type_traits>
-  #include <fmt/format.h>
-
-  struct A {
-    virtual ~A() {}
-    virtual std::string name() const { return "A"; }
-  };
-
-  struct B : A {
-    virtual std::string name() const { return "B"; }
-  };
-
-  template <typename T>
-  struct fmt::formatter<T, std::enable_if_t<std::is_base_of<A, T>::value, char>> :
-      fmt::formatter<std::string> {
-    template <typename FormatCtx>
-    auto format(const A& a, FormatCtx& ctx) {
-      return fmt::formatter<std::string>::format(a.name(), ctx);
-    }
-  };
-
-  int main() {
-    B b;
-    A& a = b;
-    fmt::print("{}", a); // prints "B"
-  }
-
-If a type provides both a ``formatter`` specialization and an implicit
-conversion to a formattable type, the specialization takes precedence over the
-conversion.
-
-.. doxygenclass:: fmt::basic_format_parse_context
-   :members:
-
-Literal-based API
------------------
-
-The following user-defined literals are defined in ``fmt/format.h``.
-
-.. doxygenfunction:: operator""_format(const char *s, size_t n) -> detail::udl_formatter<char> 
-
-.. doxygenfunction:: operator""_a(const char *s, size_t) -> detail::udl_arg<char>
-
-Utilities
----------
-
-.. doxygenfunction:: fmt::ptr(T p) -> const void*
-.. doxygenfunction:: fmt::ptr(const std::unique_ptr<T> &p) -> const void*
-.. doxygenfunction:: fmt::ptr(const std::shared_ptr<T> &p) -> const void*
-
-.. doxygenfunction:: fmt::to_string(const T &value) -> std::string
-
-.. doxygenfunction:: fmt::to_string_view(const Char *s) -> basic_string_view<Char>
-
-.. doxygenfunction:: fmt::join(Range &&range, string_view sep) -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>>
-
-.. doxygenfunction:: fmt::join(It begin, Sentinel end, string_view sep) -> join_view<It, Sentinel>
-
-.. doxygenfunction:: fmt::group_digits(T value) -> group_digits_view<T>
-
-.. doxygenclass:: fmt::detail::buffer
-   :members:
-
-.. doxygenclass:: fmt::basic_memory_buffer
-   :protected-members:
-   :members:
-
-System Errors
--------------
-
-{fmt} does not use ``errno`` to communicate errors to the user, but it may call
-system functions which set ``errno``. Users should not make any assumptions
-about the value of ``errno`` being preserved by library functions.
-
-.. doxygenfunction:: fmt::system_error
-
-.. doxygenfunction:: fmt::format_system_error
-
-Custom Allocators
------------------
-
-The {fmt} library supports custom dynamic memory allocators.
-A custom allocator class can be specified as a template argument to
-:class:`fmt::basic_memory_buffer`::
-
-    using custom_memory_buffer = 
-      fmt::basic_memory_buffer<char, fmt::inline_buffer_size, custom_allocator>;
-
-It is also possible to write a formatting function that uses a custom
-allocator::
-
-    using custom_string =
-      std::basic_string<char, std::char_traits<char>, custom_allocator>;
-
-    custom_string vformat(custom_allocator alloc, fmt::string_view format_str,
-                          fmt::format_args args) {
-      auto buf = custom_memory_buffer(alloc);
-      fmt::vformat_to(std::back_inserter(buf), format_str, args);
-      return custom_string(buf.data(), buf.size(), alloc);
-    }
-
-    template <typename ...Args>
-    inline custom_string format(custom_allocator alloc,
-                                fmt::string_view format_str,
-                                const Args& ... args) {
-      return vformat(alloc, format_str, fmt::make_format_args(args...));
-    }
-
-The allocator will be used for the output container only. Formatting functions
-normally don't do any allocations for built-in and string types except for
-non-default floating-point formatting that occasionally falls back on
-``sprintf``.
-
-.. _ranges-api:
-
-Ranges and Tuple Formatting
-===========================
-
-The library also supports convenient formatting of ranges and tuples::
-
-  #include <fmt/ranges.h>
-
-  std::tuple<char, int, float> t{'a', 1, 2.0f};
-  // Prints "('a', 1, 2.0)"
-  fmt::print("{}", t);
-
-
-NOTE: currently, the overload of ``fmt::join`` for iterables exists in the main
-``format.h`` header, but expect this to change in the future.
-
-Using ``fmt::join``, you can separate tuple elements with a custom separator::
-
-  #include <fmt/ranges.h>
-
-  std::tuple<int, char> t = {1, 'a'};
-  // Prints "1, a"
-  fmt::print("{}", fmt::join(t, ", "));
-
-.. _chrono-api:
-
-Date and Time Formatting
-========================
-
-``fmt/chrono.h`` provides formatters for
-
-* `std::chrono::duration <https://en.cppreference.com/w/cpp/chrono/duration>`_
-* `std::chrono::time_point
-  <https://en.cppreference.com/w/cpp/chrono/time_point>`_
-* `std::tm <https://en.cppreference.com/w/cpp/chrono/c/tm>`_
-
-The format syntax is described in :ref:`chrono-specs`.
-
-**Example**::
-
-  #include <fmt/chrono.h>
-
-  int main() {
-    std::time_t t = std::time(nullptr);
-
-    // Prints "The date is 2020-11-07." (with the current date):
-    fmt::print("The date is {:%Y-%m-%d}.", fmt::localtime(t));
-
-    using namespace std::literals::chrono_literals;
-
-    // Prints "Default format: 42s 100ms":
-    fmt::print("Default format: {} {}\n", 42s, 100ms);
-
-    // Prints "strftime-like format: 03:15:30":
-    fmt::print("strftime-like format: {:%H:%M:%S}\n", 3h + 15min + 30s);
-  }
-
-.. doxygenfunction:: localtime(std::time_t time)
-
-.. doxygenfunction:: gmtime(std::time_t time)
-
-.. _compile-api:
-
-Format string compilation
-=========================
-
-``fmt/compile.h`` provides format string compilation support when using
-``FMT_COMPILE``. Format strings are parsed, checked and converted into efficient
-formatting code at compile-time. This supports arguments of built-in and string
-types as well as user-defined types with ``constexpr`` ``parse`` functions in
-their ``formatter`` specializations. Format string compilation can generate more
-binary code compared to the default API and is only recommended in places where
-formatting is a performance bottleneck.
-
-.. doxygendefine:: FMT_COMPILE
-
-.. _color-api:
-
-Terminal color and text style
-=============================
-
-``fmt/color.h`` provides support for terminal color and text style output.
-
-.. doxygenfunction:: print(const text_style &ts, const S &format_str, const Args&... args)
-
-.. doxygenfunction:: fg(detail::color_type)
-
-.. doxygenfunction:: bg(detail::color_type)
-
-.. _os-api:
-
-System APIs
-===========
-
-.. doxygenclass:: fmt::ostream
-   :members:
-
-.. doxygenfunction:: fmt::windows_error
-   :members:
-
-.. _ostream-api:
-
-``std::ostream`` Support
-========================
-
-``fmt/ostream.h`` provides ``std::ostream`` support including formatting of
-user-defined types that have an overloaded insertion operator (``operator<<``)::
-
-  #include <fmt/ostream.h>
-
-  class date {
-    int year_, month_, day_;
-  public:
-    date(int year, int month, int day): year_(year), month_(month), day_(day) {}
-
-    friend std::ostream& operator<<(std::ostream& os, const date& d) {
-      return os << d.year_ << '-' << d.month_ << '-' << d.day_;
-    }
-  };
-
-  std::string s = fmt::format("The date is {}", date(2012, 12, 9));
-  // s == "The date is 2012-12-9"
-
-{fmt} only supports insertion operators that are defined in the same namespaces
-as the types they format and can be found with the argument-dependent lookup.
-
-.. doxygenfunction:: print(std::basic_ostream<Char> &os, const S &format_str, Args&&... args)
-
-.. _printf-api:
-
-``printf`` Formatting
-=====================
-
-The header ``fmt/printf.h`` provides ``printf``-like formatting functionality.
-The following functions use `printf format string syntax
-<https://pubs.opengroup.org/onlinepubs/009695399/functions/fprintf.html>`_ with
-the POSIX extension for positional arguments. Unlike their standard
-counterparts, the ``fmt`` functions are type-safe and throw an exception if an
-argument type doesn't match its format specification.
-
-.. doxygenfunction:: printf(const S &format_str, const T&... args)
-
-.. doxygenfunction:: fprintf(std::FILE *f, const S &fmt, const T&... args) -> int
-
-.. doxygenfunction:: sprintf(const S&, const T&...)
-
-.. _xchar-api:
-
-``wchar_t`` Support
-===================
-
-The optional header ``fmt/xchar.h`` provides support for ``wchar_t`` and exotic
-character types.
-
-.. doxygenstruct:: fmt::is_char
-
-.. doxygentypedef:: fmt::wstring_view
-
-.. doxygentypedef:: fmt::wformat_context
-
-.. doxygenfunction:: fmt::to_wstring(const T &value)
-
-Compatibility with C++20 ``std::format``
-========================================
-
-{fmt} implements nearly all of the `C++20 formatting library
-<https://en.cppreference.com/w/cpp/utility/format>`_ with the following
-differences:
-
-* Names are defined in the ``fmt`` namespace instead of ``std`` to avoid
-  collisions with standard library implementations.
-* Width calculation doesn't use grapheme clusterization. The latter has been
-  implemented in a separate branch but hasn't been integrated yet.
-* Most C++20 chrono types are not supported yet.
diff --git a/3rdparty/fmt/doc/basic-bootstrap/README b/3rdparty/fmt/doc/basic-bootstrap/README
deleted file mode 100644
index ba67700d..00000000
--- a/3rdparty/fmt/doc/basic-bootstrap/README
+++ /dev/null
@@ -1,2 +0,0 @@
-Sphinx basic theme with Bootstrap support. Modifications are kept to
-a minimum to simplify integration in case of changes to Sphinx theming.
diff --git a/3rdparty/fmt/doc/basic-bootstrap/layout.html b/3rdparty/fmt/doc/basic-bootstrap/layout.html
deleted file mode 100644
index 5519c4b5..00000000
--- a/3rdparty/fmt/doc/basic-bootstrap/layout.html
+++ /dev/null
@@ -1,208 +0,0 @@
-{#
-    basic/layout.html
-    ~~~~~~~~~~~~~~~~~
-
-    Master layout template for Sphinx themes.
-
-    :copyright: Copyright 2007-2015 by the Sphinx team, see AUTHORS.
-    :license: BSD, see LICENSE for details.
-#}
-{%- block doctype -%}
-<!DOCTYPE html>
-{%- endblock %}
-{%- set reldelim1 = reldelim1 is not defined and ' &raquo;' or reldelim1 %}
-{%- set reldelim2 = reldelim2 is not defined and ' |' or reldelim2 %}
-{%- set render_sidebar = (not embedded) and (not theme_nosidebar|tobool) and
-                         (sidebars != []) %}
-{%- set url_root = pathto('', 1) %}
-{# XXX necessary? #}
-{%- if url_root == '#' %}{% set url_root = '' %}{% endif %}
-{%- if not embedded and docstitle %}
-  {%- set titlesuffix = " &mdash; "|safe + docstitle|e %}
-{%- else %}
-  {%- set titlesuffix = "" %}
-{%- endif %}
-
-{%- macro relbar() %}
-    <div class="related" role="navigation" aria-label="related navigation">
-      <h3>{{ _('Navigation') }}</h3>
-      <ul>
-        {%- for rellink in rellinks %}
-        <li class="right" {% if loop.first %}style="margin-right: 10px"{% endif %}>
-          <a href="{{ pathto(rellink[0]) }}" title="{{ rellink[1]|striptags|e }}"
-             {{ accesskey(rellink[2]) }}>{{ rellink[3] }}</a>
-          {%- if not loop.first %}{{ reldelim2 }}{% endif %}</li>
-        {%- endfor %}
-        {%- block rootrellink %}
-        <li class="nav-item nav-item-0"><a href="{{ pathto(master_doc) }}">{{ shorttitle|e }}</a>{{ reldelim1 }}</li>
-        {%- endblock %}
-        {%- for parent in parents %}
-          <li class="nav-item nav-item-{{ loop.index }}"><a href="{{ parent.link|e }}" {% if loop.last %}{{ accesskey("U") }}{% endif %}>{{ parent.title }}</a>{{ reldelim1 }}</li>
-        {%- endfor %}
-        {%- block relbaritems %} {% endblock %}
-      </ul>
-    </div>
-{%- endmacro %}
-
-{%- macro sidebar() %}
-      {%- if render_sidebar %}
-      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
-        <div class="sphinxsidebarwrapper">
-          {%- block sidebarlogo %}
-          {%- if logo %}
-            <p class="logo"><a href="{{ pathto(master_doc) }}">
-              <img class="logo" src="{{ pathto('_static/' + logo, 1) }}" alt="Logo"/>
-            </a></p>
-          {%- endif %}
-          {%- endblock %}
-          {%- if sidebars != None %}
-            {#- new style sidebar: explicitly include/exclude templates #}
-            {%- for sidebartemplate in sidebars %}
-            {%- include sidebartemplate %}
-            {%- endfor %}
-          {%- else %}
-            {#- old style sidebars: using blocks -- should be deprecated #}
-            {%- block sidebartoc %}
-            {%- include "localtoc.html" %}
-            {%- endblock %}
-            {%- block sidebarrel %}
-            {%- include "relations.html" %}
-            {%- endblock %}
-            {%- block sidebarsourcelink %}
-            {%- include "sourcelink.html" %}
-            {%- endblock %}
-            {%- if customsidebar %}
-            {%- include customsidebar %}
-            {%- endif %}
-            {%- block sidebarsearch %}
-            {%- include "searchbox.html" %}
-            {%- endblock %}
-          {%- endif %}
-        </div>
-      </div>
-      {%- endif %}
-{%- endmacro %}
-
-{%- macro script() %}
-    <script type="text/javascript">
-      var DOCUMENTATION_OPTIONS = {
-        URL_ROOT:    '{{ url_root }}',
-        VERSION:     '{{ release|e }}',
-        COLLAPSE_INDEX: false,
-        FILE_SUFFIX: '{{ '' if no_search_suffix else file_suffix }}',
-        LINK_SUFFIX: '{{ link_suffix }}',
-        SOURCELINK_SUFFIX: '{{ sourcelink_suffix }}',
-        HAS_SOURCE:  {{ has_source|lower }},
-        SOURCELINK_SUFFIX:  '{{ sourcelink_suffix }}'
-      };
-    </script>
-    {%- for scriptfile in script_files %}
-    {{ js_tag(scriptfile) }}
-    {%- endfor %}
-{%- endmacro %}
-
-{%- macro css() %}
-    <link rel="stylesheet" href="{{ pathto('_static/' + style, 1) }}" type="text/css" />
-    <link rel="stylesheet" href="{{ pathto('_static/pygments.css', 1) }}" type="text/css" />
-    {%- for cssfile in css_files %}
-    <link rel="stylesheet" href="{{ pathto(cssfile, 1) }}" type="text/css" />
-    {%- endfor %}
-{%- endmacro %}
-
-<html lang="en">
-  <head>
-    <meta charset="{{ encoding }}">
-    <meta http-equiv="X-UA-Compatible" content="IE=edge">
-    <meta name="viewport" content="width=device-width, initial-scale=1">
-    {# The above 3 meta tags *must* come first in the head; any other head content
-       must come *after* these tags. #}
-    {{ metatags }}
-    {%- block htmltitle %}
-    <title>{{ title|striptags|e }}{{ titlesuffix }}</title>
-    {%- endblock %}
-    {{ css() }}
-    {%- if not embedded %}
-    {{ script() }}
-    {%- if use_opensearch %}
-    <link rel="search" type="application/opensearchdescription+xml"
-          title="{% trans docstitle=docstitle|e %}Search within {{ docstitle }}{% endtrans %}"
-          href="{{ pathto('_static/opensearch.xml', 1) }}"/>
-    {%- endif %}
-    {%- if favicon %}
-    <link rel="shortcut icon" href="{{ pathto('_static/' + favicon, 1) }}"/>
-    {%- endif %}
-    {%- endif %}
-{%- block linktags %}
-    {%- if hasdoc('about') %}
-    <link rel="author" title="{{ _('About these documents') }}" href="{{ pathto('about') }}" />
-    {%- endif %}
-    {%- if hasdoc('genindex') %}
-    <link rel="index" title="{{ _('Index') }}" href="{{ pathto('genindex') }}" />
-    {%- endif %}
-    {%- if hasdoc('search') %}
-    <link rel="search" title="{{ _('Search') }}" href="{{ pathto('search') }}" />
-    {%- endif %}
-    {%- if hasdoc('copyright') %}
-    <link rel="copyright" title="{{ _('Copyright') }}" href="{{ pathto('copyright') }}" />
-    {%- endif %}
-    {%- if parents %}
-    <link rel="up" title="{{ parents[-1].title|striptags|e }}" href="{{ parents[-1].link|e }}" />
-    {%- endif %}
-    {%- if next %}
-    <link rel="next" title="{{ next.title|striptags|e }}" href="{{ next.link|e }}" />
-    {%- endif %}
-    {%- if prev %}
-    <link rel="prev" title="{{ prev.title|striptags|e }}" href="{{ prev.link|e }}" />
-    {%- endif %}
-{%- endblock %}
-{%- block extrahead %} {% endblock %}
-  </head>
-  <body role="document">
-{%- block header %}{% endblock %}
-
-{%- block relbar1 %}{{ relbar() }}{% endblock %}
-
-{%- block content %}
-  {%- block sidebar1 %} {# possible location for sidebar #} {% endblock %}
-
-    <div class="document">
-  {%- block document %}
-      <div class="documentwrapper">
-      {%- if render_sidebar %}
-        <div class="bodywrapper">
-      {%- endif %}
-          <div class="body" role="main">
-            {% block body %} {% endblock %}
-          </div>
-      {%- if render_sidebar %}
-        </div>
-      {%- endif %}
-      </div>
-  {%- endblock %}
-
-  {%- block sidebar2 %}{{ sidebar() }}{% endblock %}
-      <div class="clearer"></div>
-    </div>
-{%- endblock %}
-
-{%- block relbar2 %}{{ relbar() }}{% endblock %}
-
-{%- block footer %}
-    <div class="footer" role="contentinfo">
-    {%- if show_copyright %}
-      {%- if hasdoc('copyright') %}
-        {% trans path=pathto('copyright'), copyright=copyright|e %}&copy; <a href="{{ path }}">Copyright</a> {{ copyright }}.{% endtrans %}
-      {%- else %}
-        {% trans copyright=copyright|e %}&copy; Copyright {{ copyright }}.{% endtrans %}
-      {%- endif %}
-    {%- endif %}
-    {%- if last_updated %}
-      {% trans last_updated=last_updated|e %}Last updated on {{ last_updated }}.{% endtrans %}
-    {%- endif %}
-    {%- if show_sphinx %}
-      {% trans sphinx_version=sphinx_version|e %}Created using <a href="http://sphinx-doc.org/">Sphinx</a> {{ sphinx_version }}.{% endtrans %}
-    {%- endif %}
-    </div>
-{%- endblock %}
-  </body>
-</html>
diff --git a/3rdparty/fmt/doc/basic-bootstrap/theme.conf b/3rdparty/fmt/doc/basic-bootstrap/theme.conf
deleted file mode 100644
index 89e03bbd..00000000
--- a/3rdparty/fmt/doc/basic-bootstrap/theme.conf
+++ /dev/null
@@ -1,2 +0,0 @@
-[theme]
-inherit = basic
diff --git a/3rdparty/fmt/doc/bootstrap/alerts.less b/3rdparty/fmt/doc/bootstrap/alerts.less
deleted file mode 100644
index c4199db9..00000000
--- a/3rdparty/fmt/doc/bootstrap/alerts.less
+++ /dev/null
@@ -1,73 +0,0 @@
-//
-// Alerts
-// --------------------------------------------------
-
-
-// Base styles
-// -------------------------
-
-.alert {
-  padding: @alert-padding;
-  margin-bottom: @line-height-computed;
-  border: 1px solid transparent;
-  border-radius: @alert-border-radius;
-
-  // Headings for larger alerts
-  h4 {
-    margin-top: 0;
-    // Specified for the h4 to prevent conflicts of changing @headings-color
-    color: inherit;
-  }
-
-  // Provide class for links that match alerts
-  .alert-link {
-    font-weight: @alert-link-font-weight;
-  }
-
-  // Improve alignment and spacing of inner content
-  > p,
-  > ul {
-    margin-bottom: 0;
-  }
-
-  > p + p {
-    margin-top: 5px;
-  }
-}
-
-// Dismissible alerts
-//
-// Expand the right padding and account for the close button's positioning.
-
-.alert-dismissable, // The misspelled .alert-dismissable was deprecated in 3.2.0.
-.alert-dismissible {
-  padding-right: (@alert-padding + 20);
-
-  // Adjust close link position
-  .close {
-    position: relative;
-    top: -2px;
-    right: -21px;
-    color: inherit;
-  }
-}
-
-// Alternate styles
-//
-// Generate contextual modifier classes for colorizing the alert.
-
-.alert-success {
-  .alert-variant(@alert-success-bg; @alert-success-border; @alert-success-text);
-}
-
-.alert-info {
-  .alert-variant(@alert-info-bg; @alert-info-border; @alert-info-text);
-}
-
-.alert-warning {
-  .alert-variant(@alert-warning-bg; @alert-warning-border; @alert-warning-text);
-}
-
-.alert-danger {
-  .alert-variant(@alert-danger-bg; @alert-danger-border; @alert-danger-text);
-}
diff --git a/3rdparty/fmt/doc/bootstrap/badges.less b/3rdparty/fmt/doc/bootstrap/badges.less
deleted file mode 100644
index c70bb939..00000000
--- a/3rdparty/fmt/doc/bootstrap/badges.less
+++ /dev/null
@@ -1,66 +0,0 @@
-//
-// Badges
-// --------------------------------------------------
-
-
-// Base class
-.badge {
-  display: inline-block;
-  min-width: 10px;
-  padding: 3px 7px;
-  font-size: @font-size-small;
-  font-weight: @badge-font-weight;
-  color: @badge-color;
-  line-height: @badge-line-height;
-  vertical-align: baseline;
-  white-space: nowrap;
-  text-align: center;
-  background-color: @badge-bg;
-  border-radius: @badge-border-radius;
-
-  // Empty badges collapse automatically (not available in IE8)
-  &:empty {
-    display: none;
-  }
-
-  // Quick fix for badges in buttons
-  .btn & {
-    position: relative;
-    top: -1px;
-  }
-
-  .btn-xs &,
-  .btn-group-xs > .btn & {
-    top: 0;
-    padding: 1px 5px;
-  }
-
-  // Hover state, but only for links
-  a& {
-    &:hover,
-    &:focus {
-      color: @badge-link-hover-color;
-      text-decoration: none;
-      cursor: pointer;
-    }
-  }
-
-  // Account for badges in navs
-  .list-group-item.active > &,
-  .nav-pills > .active > a > & {
-    color: @badge-active-color;
-    background-color: @badge-active-bg;
-  }
-
-  .list-group-item > & {
-    float: right;
-  }
-
-  .list-group-item > & + & {
-    margin-right: 5px;
-  }
-
-  .nav-pills > li > a > & {
-    margin-left: 3px;
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/bootstrap.less b/3rdparty/fmt/doc/bootstrap/bootstrap.less
deleted file mode 100644
index 61b77474..00000000
--- a/3rdparty/fmt/doc/bootstrap/bootstrap.less
+++ /dev/null
@@ -1,50 +0,0 @@
-// Core variables and mixins
-@import "variables.less";
-@import "mixins.less";
-
-// Reset and dependencies
-@import "normalize.less";
-@import "print.less";
-@import "glyphicons.less";
-
-// Core CSS
-@import "scaffolding.less";
-@import "type.less";
-@import "code.less";
-@import "grid.less";
-@import "tables.less";
-@import "forms.less";
-@import "buttons.less";
-
-// Components
-@import "component-animations.less";
-@import "dropdowns.less";
-@import "button-groups.less";
-@import "input-groups.less";
-@import "navs.less";
-@import "navbar.less";
-@import "breadcrumbs.less";
-@import "pagination.less";
-@import "pager.less";
-@import "labels.less";
-@import "badges.less";
-@import "jumbotron.less";
-@import "thumbnails.less";
-@import "alerts.less";
-@import "progress-bars.less";
-@import "media.less";
-@import "list-group.less";
-@import "panels.less";
-@import "responsive-embed.less";
-@import "wells.less";
-@import "close.less";
-
-// Components w/ JavaScript
-@import "modals.less";
-@import "tooltip.less";
-@import "popovers.less";
-@import "carousel.less";
-
-// Utility classes
-@import "utilities.less";
-@import "responsive-utilities.less";
diff --git a/3rdparty/fmt/doc/bootstrap/breadcrumbs.less b/3rdparty/fmt/doc/bootstrap/breadcrumbs.less
deleted file mode 100644
index cb01d503..00000000
--- a/3rdparty/fmt/doc/bootstrap/breadcrumbs.less
+++ /dev/null
@@ -1,26 +0,0 @@
-//
-// Breadcrumbs
-// --------------------------------------------------
-
-
-.breadcrumb {
-  padding: @breadcrumb-padding-vertical @breadcrumb-padding-horizontal;
-  margin-bottom: @line-height-computed;
-  list-style: none;
-  background-color: @breadcrumb-bg;
-  border-radius: @border-radius-base;
-
-  > li {
-    display: inline-block;
-
-    + li:before {
-      content: "@{breadcrumb-separator}\00a0"; // Unicode space added since inline-block means non-collapsing white-space
-      padding: 0 5px;
-      color: @breadcrumb-color;
-    }
-  }
-
-  > .active {
-    color: @breadcrumb-active-color;
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/button-groups.less b/3rdparty/fmt/doc/bootstrap/button-groups.less
deleted file mode 100644
index 13c1800d..00000000
--- a/3rdparty/fmt/doc/bootstrap/button-groups.less
+++ /dev/null
@@ -1,243 +0,0 @@
-//
-// Button groups
-// --------------------------------------------------
-
-// Make the div behave like a button
-.btn-group,
-.btn-group-vertical {
-  position: relative;
-  display: inline-block;
-  vertical-align: middle; // match .btn alignment given font-size hack above
-  > .btn {
-    position: relative;
-    float: left;
-    // Bring the "active" button to the front
-    &:hover,
-    &:focus,
-    &:active,
-    &.active {
-      z-index: 2;
-    }
-  }
-}
-
-// Prevent double borders when buttons are next to each other
-.btn-group {
-  .btn + .btn,
-  .btn + .btn-group,
-  .btn-group + .btn,
-  .btn-group + .btn-group {
-    margin-left: -1px;
-  }
-}
-
-// Optional: Group multiple button groups together for a toolbar
-.btn-toolbar {
-  margin-left: -5px; // Offset the first child's margin
-  &:extend(.clearfix all);
-
-  .btn-group,
-  .input-group {
-    float: left;
-  }
-  > .btn,
-  > .btn-group,
-  > .input-group {
-    margin-left: 5px;
-  }
-}
-
-.btn-group > .btn:not(:first-child):not(:last-child):not(.dropdown-toggle) {
-  border-radius: 0;
-}
-
-// Set corners individual because sometimes a single button can be in a .btn-group and we need :first-child and :last-child to both match
-.btn-group > .btn:first-child {
-  margin-left: 0;
-  &:not(:last-child):not(.dropdown-toggle) {
-    .border-right-radius(0);
-  }
-}
-// Need .dropdown-toggle since :last-child doesn't apply given a .dropdown-menu immediately after it
-.btn-group > .btn:last-child:not(:first-child),
-.btn-group > .dropdown-toggle:not(:first-child) {
-  .border-left-radius(0);
-}
-
-// Custom edits for including btn-groups within btn-groups (useful for including dropdown buttons within a btn-group)
-.btn-group > .btn-group {
-  float: left;
-}
-.btn-group > .btn-group:not(:first-child):not(:last-child) > .btn {
-  border-radius: 0;
-}
-.btn-group > .btn-group:first-child:not(:last-child) {
-  > .btn:last-child,
-  > .dropdown-toggle {
-    .border-right-radius(0);
-  }
-}
-.btn-group > .btn-group:last-child:not(:first-child) > .btn:first-child {
-  .border-left-radius(0);
-}
-
-// On active and open, don't show outline
-.btn-group .dropdown-toggle:active,
-.btn-group.open .dropdown-toggle {
-  outline: 0;
-}
-
-
-// Sizing
-//
-// Remix the default button sizing classes into new ones for easier manipulation.
-
-.btn-group-xs > .btn { &:extend(.btn-xs); }
-.btn-group-sm > .btn { &:extend(.btn-sm); }
-.btn-group-lg > .btn { &:extend(.btn-lg); }
-
-
-// Split button dropdowns
-// ----------------------
-
-// Give the line between buttons some depth
-.btn-group > .btn + .dropdown-toggle {
-  padding-left: 8px;
-  padding-right: 8px;
-}
-.btn-group > .btn-lg + .dropdown-toggle {
-  padding-left: 12px;
-  padding-right: 12px;
-}
-
-// The clickable button for toggling the menu
-// Remove the gradient and set the same inset shadow as the :active state
-.btn-group.open .dropdown-toggle {
-  .box-shadow(inset 0 3px 5px rgba(0,0,0,.125));
-
-  // Show no shadow for `.btn-link` since it has no other button styles.
-  &.btn-link {
-    .box-shadow(none);
-  }
-}
-
-
-// Reposition the caret
-.btn .caret {
-  margin-left: 0;
-}
-// Carets in other button sizes
-.btn-lg .caret {
-  border-width: @caret-width-large @caret-width-large 0;
-  border-bottom-width: 0;
-}
-// Upside down carets for .dropup
-.dropup .btn-lg .caret {
-  border-width: 0 @caret-width-large @caret-width-large;
-}
-
-
-// Vertical button groups
-// ----------------------
-
-.btn-group-vertical {
-  > .btn,
-  > .btn-group,
-  > .btn-group > .btn {
-    display: block;
-    float: none;
-    width: 100%;
-    max-width: 100%;
-  }
-
-  // Clear floats so dropdown menus can be properly placed
-  > .btn-group {
-    &:extend(.clearfix all);
-    > .btn {
-      float: none;
-    }
-  }
-
-  > .btn + .btn,
-  > .btn + .btn-group,
-  > .btn-group + .btn,
-  > .btn-group + .btn-group {
-    margin-top: -1px;
-    margin-left: 0;
-  }
-}
-
-.btn-group-vertical > .btn {
-  &:not(:first-child):not(:last-child) {
-    border-radius: 0;
-  }
-  &:first-child:not(:last-child) {
-    border-top-right-radius: @border-radius-base;
-    .border-bottom-radius(0);
-  }
-  &:last-child:not(:first-child) {
-    border-bottom-left-radius: @border-radius-base;
-    .border-top-radius(0);
-  }
-}
-.btn-group-vertical > .btn-group:not(:first-child):not(:last-child) > .btn {
-  border-radius: 0;
-}
-.btn-group-vertical > .btn-group:first-child:not(:last-child) {
-  > .btn:last-child,
-  > .dropdown-toggle {
-    .border-bottom-radius(0);
-  }
-}
-.btn-group-vertical > .btn-group:last-child:not(:first-child) > .btn:first-child {
-  .border-top-radius(0);
-}
-
-
-// Justified button groups
-// ----------------------
-
-.btn-group-justified {
-  display: table;
-  width: 100%;
-  table-layout: fixed;
-  border-collapse: separate;
-  > .btn,
-  > .btn-group {
-    float: none;
-    display: table-cell;
-    width: 1%;
-  }
-  > .btn-group .btn {
-    width: 100%;
-  }
-
-  > .btn-group .dropdown-menu {
-    left: auto;
-  }
-}
-
-
-// Checkbox and radio options
-//
-// In order to support the browser's form validation feedback, powered by the
-// `required` attribute, we have to "hide" the inputs via `clip`. We cannot use
-// `display: none;` or `visibility: hidden;` as that also hides the popover.
-// Simply visually hiding the inputs via `opacity` would leave them clickable in
-// certain cases which is prevented by using `clip` and `pointer-events`.
-// This way, we ensure a DOM element is visible to position the popover from.
-//
-// See https://github.com/twbs/bootstrap/pull/12794 and
-// https://github.com/twbs/bootstrap/pull/14559 for more information.
-
-[data-toggle="buttons"] {
-  > .btn,
-  > .btn-group > .btn {
-    input[type="radio"],
-    input[type="checkbox"] {
-      position: absolute;
-      clip: rect(0,0,0,0);
-      pointer-events: none;
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/buttons.less b/3rdparty/fmt/doc/bootstrap/buttons.less
deleted file mode 100644
index 5a746049..00000000
--- a/3rdparty/fmt/doc/bootstrap/buttons.less
+++ /dev/null
@@ -1,160 +0,0 @@
-//
-// Buttons
-// --------------------------------------------------
-
-
-// Base styles
-// --------------------------------------------------
-
-.btn {
-  display: inline-block;
-  margin-bottom: 0; // For input.btn
-  font-weight: @btn-font-weight;
-  text-align: center;
-  vertical-align: middle;
-  touch-action: manipulation;
-  cursor: pointer;
-  background-image: none; // Reset unusual Firefox-on-Android default style; see https://github.com/necolas/normalize.css/issues/214
-  border: 1px solid transparent;
-  white-space: nowrap;
-  .button-size(@padding-base-vertical; @padding-base-horizontal; @font-size-base; @line-height-base; @border-radius-base);
-  .user-select(none);
-
-  &,
-  &:active,
-  &.active {
-    &:focus,
-    &.focus {
-      .tab-focus();
-    }
-  }
-
-  &:hover,
-  &:focus,
-  &.focus {
-    color: @btn-default-color;
-    text-decoration: none;
-  }
-
-  &:active,
-  &.active {
-    outline: 0;
-    background-image: none;
-    .box-shadow(inset 0 3px 5px rgba(0,0,0,.125));
-  }
-
-  &.disabled,
-  &[disabled],
-  fieldset[disabled] & {
-    cursor: @cursor-disabled;
-    pointer-events: none; // Future-proof disabling of clicks
-    .opacity(.65);
-    .box-shadow(none);
-  }
-}
-
-
-// Alternate buttons
-// --------------------------------------------------
-
-.btn-default {
-  .button-variant(@btn-default-color; @btn-default-bg; @btn-default-border);
-}
-.btn-primary {
-  .button-variant(@btn-primary-color; @btn-primary-bg; @btn-primary-border);
-}
-// Success appears as green
-.btn-success {
-  .button-variant(@btn-success-color; @btn-success-bg; @btn-success-border);
-}
-// Info appears as blue-green
-.btn-info {
-  .button-variant(@btn-info-color; @btn-info-bg; @btn-info-border);
-}
-// Warning appears as orange
-.btn-warning {
-  .button-variant(@btn-warning-color; @btn-warning-bg; @btn-warning-border);
-}
-// Danger and error appear as red
-.btn-danger {
-  .button-variant(@btn-danger-color; @btn-danger-bg; @btn-danger-border);
-}
-
-
-// Link buttons
-// -------------------------
-
-// Make a button look and behave like a link
-.btn-link {
-  color: @link-color;
-  font-weight: normal;
-  border-radius: 0;
-
-  &,
-  &:active,
-  &.active,
-  &[disabled],
-  fieldset[disabled] & {
-    background-color: transparent;
-    .box-shadow(none);
-  }
-  &,
-  &:hover,
-  &:focus,
-  &:active {
-    border-color: transparent;
-  }
-  &:hover,
-  &:focus {
-    color: @link-hover-color;
-    text-decoration: @link-hover-decoration;
-    background-color: transparent;
-  }
-  &[disabled],
-  fieldset[disabled] & {
-    &:hover,
-    &:focus {
-      color: @btn-link-disabled-color;
-      text-decoration: none;
-    }
-  }
-}
-
-
-// Button Sizes
-// --------------------------------------------------
-
-.btn-lg {
-  // line-height: ensure even-numbered height of button next to large input
-  .button-size(@padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @border-radius-large);
-}
-.btn-sm {
-  // line-height: ensure proper height of button next to small input
-  .button-size(@padding-small-vertical; @padding-small-horizontal; @font-size-small; @line-height-small; @border-radius-small);
-}
-.btn-xs {
-  .button-size(@padding-xs-vertical; @padding-xs-horizontal; @font-size-small; @line-height-small; @border-radius-small);
-}
-
-
-// Block button
-// --------------------------------------------------
-
-.btn-block {
-  display: block;
-  width: 100%;
-}
-
-// Vertically space out multiple block buttons
-.btn-block + .btn-block {
-  margin-top: 5px;
-}
-
-// Specificity overrides
-input[type="submit"],
-input[type="reset"],
-input[type="button"] {
-  &.btn-block {
-    width: 100%;
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/carousel.less b/3rdparty/fmt/doc/bootstrap/carousel.less
deleted file mode 100644
index 4bbe946d..00000000
--- a/3rdparty/fmt/doc/bootstrap/carousel.less
+++ /dev/null
@@ -1,269 +0,0 @@
-//
-// Carousel
-// --------------------------------------------------
-
-
-// Wrapper for the slide container and indicators
-.carousel {
-  position: relative;
-}
-
-.carousel-inner {
-  position: relative;
-  overflow: hidden;
-  width: 100%;
-
-  > .item {
-    display: none;
-    position: relative;
-    .transition(.6s ease-in-out left);
-
-    // Account for jankitude on images
-    > img,
-    > a > img {
-      &:extend(.img-responsive);
-      line-height: 1;
-    }
-
-    // WebKit CSS3 transforms for supported devices
-    @media all and (transform-3d), (-webkit-transform-3d) {
-      .transition-transform(~'0.6s ease-in-out');
-      .backface-visibility(~'hidden');
-      .perspective(1000);
-
-      &.next,
-      &.active.right {
-        .translate3d(100%, 0, 0);
-        left: 0;
-      }
-      &.prev,
-      &.active.left {
-        .translate3d(-100%, 0, 0);
-        left: 0;
-      }
-      &.next.left,
-      &.prev.right,
-      &.active {
-        .translate3d(0, 0, 0);
-        left: 0;
-      }
-    }
-  }
-
-  > .active,
-  > .next,
-  > .prev {
-    display: block;
-  }
-
-  > .active {
-    left: 0;
-  }
-
-  > .next,
-  > .prev {
-    position: absolute;
-    top: 0;
-    width: 100%;
-  }
-
-  > .next {
-    left: 100%;
-  }
-  > .prev {
-    left: -100%;
-  }
-  > .next.left,
-  > .prev.right {
-    left: 0;
-  }
-
-  > .active.left {
-    left: -100%;
-  }
-  > .active.right {
-    left: 100%;
-  }
-
-}
-
-// Left/right controls for nav
-// ---------------------------
-
-.carousel-control {
-  position: absolute;
-  top: 0;
-  left: 0;
-  bottom: 0;
-  width: @carousel-control-width;
-  .opacity(@carousel-control-opacity);
-  font-size: @carousel-control-font-size;
-  color: @carousel-control-color;
-  text-align: center;
-  text-shadow: @carousel-text-shadow;
-  // We can't have this transition here because WebKit cancels the carousel
-  // animation if you trip this while in the middle of another animation.
-
-  // Set gradients for backgrounds
-  &.left {
-    #gradient > .horizontal(@start-color: rgba(0,0,0,.5); @end-color: rgba(0,0,0,.0001));
-  }
-  &.right {
-    left: auto;
-    right: 0;
-    #gradient > .horizontal(@start-color: rgba(0,0,0,.0001); @end-color: rgba(0,0,0,.5));
-  }
-
-  // Hover/focus state
-  &:hover,
-  &:focus {
-    outline: 0;
-    color: @carousel-control-color;
-    text-decoration: none;
-    .opacity(.9);
-  }
-
-  // Toggles
-  .icon-prev,
-  .icon-next,
-  .glyphicon-chevron-left,
-  .glyphicon-chevron-right {
-    position: absolute;
-    top: 50%;
-    z-index: 5;
-    display: inline-block;
-  }
-  .icon-prev,
-  .glyphicon-chevron-left {
-    left: 50%;
-    margin-left: -10px;
-  }
-  .icon-next,
-  .glyphicon-chevron-right {
-    right: 50%;
-    margin-right: -10px;
-  }
-  .icon-prev,
-  .icon-next {
-    width:  20px;
-    height: 20px;
-    margin-top: -10px;
-    line-height: 1;
-    font-family: serif;
-  }
-
-
-  .icon-prev {
-    &:before {
-      content: '\2039';// SINGLE LEFT-POINTING ANGLE QUOTATION MARK (U+2039)
-    }
-  }
-  .icon-next {
-    &:before {
-      content: '\203a';// SINGLE RIGHT-POINTING ANGLE QUOTATION MARK (U+203A)
-    }
-  }
-}
-
-// Optional indicator pips
-//
-// Add an unordered list with the following class and add a list item for each
-// slide your carousel holds.
-
-.carousel-indicators {
-  position: absolute;
-  bottom: 10px;
-  left: 50%;
-  z-index: 15;
-  width: 60%;
-  margin-left: -30%;
-  padding-left: 0;
-  list-style: none;
-  text-align: center;
-
-  li {
-    display: inline-block;
-    width:  10px;
-    height: 10px;
-    margin: 1px;
-    text-indent: -999px;
-    border: 1px solid @carousel-indicator-border-color;
-    border-radius: 10px;
-    cursor: pointer;
-
-    // IE8-9 hack for event handling
-    //
-    // Internet Explorer 8-9 does not support clicks on elements without a set
-    // `background-color`. We cannot use `filter` since that's not viewed as a
-    // background color by the browser. Thus, a hack is needed.
-    // See https://developer.mozilla.org/en-US/docs/Web/Events/click#Internet_Explorer
-    //
-    // For IE8, we set solid black as it doesn't support `rgba()`. For IE9, we
-    // set alpha transparency for the best results possible.
-    background-color: #000 \9; // IE8
-    background-color: rgba(0,0,0,0); // IE9
-  }
-  .active {
-    margin: 0;
-    width:  12px;
-    height: 12px;
-    background-color: @carousel-indicator-active-bg;
-  }
-}
-
-// Optional captions
-// -----------------------------
-// Hidden by default for smaller viewports
-.carousel-caption {
-  position: absolute;
-  left: 15%;
-  right: 15%;
-  bottom: 20px;
-  z-index: 10;
-  padding-top: 20px;
-  padding-bottom: 20px;
-  color: @carousel-caption-color;
-  text-align: center;
-  text-shadow: @carousel-text-shadow;
-  & .btn {
-    text-shadow: none; // No shadow for button elements in carousel-caption
-  }
-}
-
-
-// Scale up controls for tablets and up
-@media screen and (min-width: @screen-sm-min) {
-
-  // Scale up the controls a smidge
-  .carousel-control {
-    .glyphicon-chevron-left,
-    .glyphicon-chevron-right,
-    .icon-prev,
-    .icon-next {
-      width: 30px;
-      height: 30px;
-      margin-top: -15px;
-      font-size: 30px;
-    }
-    .glyphicon-chevron-left,
-    .icon-prev {
-      margin-left: -15px;
-    }
-    .glyphicon-chevron-right,
-    .icon-next {
-      margin-right: -15px;
-    }
-  }
-
-  // Show and left align the captions
-  .carousel-caption {
-    left: 20%;
-    right: 20%;
-    padding-bottom: 30px;
-  }
-
-  // Move up the indicators
-  .carousel-indicators {
-    bottom: 20px;
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/close.less b/3rdparty/fmt/doc/bootstrap/close.less
deleted file mode 100644
index 6d5bfe08..00000000
--- a/3rdparty/fmt/doc/bootstrap/close.less
+++ /dev/null
@@ -1,34 +0,0 @@
-//
-// Close icons
-// --------------------------------------------------
-
-
-.close {
-  float: right;
-  font-size: (@font-size-base * 1.5);
-  font-weight: @close-font-weight;
-  line-height: 1;
-  color: @close-color;
-  text-shadow: @close-text-shadow;
-  .opacity(.2);
-
-  &:hover,
-  &:focus {
-    color: @close-color;
-    text-decoration: none;
-    cursor: pointer;
-    .opacity(.5);
-  }
-
-  // Additional properties for button version
-  // iOS requires the button element instead of an anchor tag.
-  // If you want the anchor version, it requires `href="#"`.
-  // See https://developer.mozilla.org/en-US/docs/Web/Events/click#Safari_Mobile
-  button& {
-    padding: 0;
-    cursor: pointer;
-    background: transparent;
-    border: 0;
-    -webkit-appearance: none;
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/code.less b/3rdparty/fmt/doc/bootstrap/code.less
deleted file mode 100644
index a08b4d48..00000000
--- a/3rdparty/fmt/doc/bootstrap/code.less
+++ /dev/null
@@ -1,69 +0,0 @@
-//
-// Code (inline and block)
-// --------------------------------------------------
-
-
-// Inline and block code styles
-code,
-kbd,
-pre,
-samp {
-  font-family: @font-family-monospace;
-}
-
-// Inline code
-code {
-  padding: 2px 4px;
-  font-size: 90%;
-  color: @code-color;
-  background-color: @code-bg;
-  border-radius: @border-radius-base;
-}
-
-// User input typically entered via keyboard
-kbd {
-  padding: 2px 4px;
-  font-size: 90%;
-  color: @kbd-color;
-  background-color: @kbd-bg;
-  border-radius: @border-radius-small;
-  box-shadow: inset 0 -1px 0 rgba(0,0,0,.25);
-
-  kbd {
-    padding: 0;
-    font-size: 100%;
-    font-weight: bold;
-    box-shadow: none;
-  }
-}
-
-// Blocks of code
-pre {
-  display: block;
-  padding: ((@line-height-computed - 1) / 2);
-  margin: 0 0 (@line-height-computed / 2);
-  font-size: (@font-size-base - 1); // 14px to 13px
-  line-height: @line-height-base;
-  word-break: break-all;
-  word-wrap: break-word;
-  color: @pre-color;
-  background-color: @pre-bg;
-  border: 1px solid @pre-border-color;
-  border-radius: @border-radius-base;
-
-  // Account for some code outputs that place code tags in pre tags
-  code {
-    padding: 0;
-    font-size: inherit;
-    color: inherit;
-    white-space: pre-wrap;
-    background-color: transparent;
-    border-radius: 0;
-  }
-}
-
-// Enable scrollable blocks of code
-.pre-scrollable {
-  max-height: @pre-scrollable-max-height;
-  overflow-y: scroll;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/component-animations.less b/3rdparty/fmt/doc/bootstrap/component-animations.less
deleted file mode 100644
index 0bcee910..00000000
--- a/3rdparty/fmt/doc/bootstrap/component-animations.less
+++ /dev/null
@@ -1,33 +0,0 @@
-//
-// Component animations
-// --------------------------------------------------
-
-// Heads up!
-//
-// We don't use the `.opacity()` mixin here since it causes a bug with text
-// fields in IE7-8. Source: https://github.com/twbs/bootstrap/pull/3552.
-
-.fade {
-  opacity: 0;
-  .transition(opacity .15s linear);
-  &.in {
-    opacity: 1;
-  }
-}
-
-.collapse {
-  display: none;
-
-  &.in      { display: block; }
-  tr&.in    { display: table-row; }
-  tbody&.in { display: table-row-group; }
-}
-
-.collapsing {
-  position: relative;
-  height: 0;
-  overflow: hidden;
-  .transition-property(~"height, visibility");
-  .transition-duration(.35s);
-  .transition-timing-function(ease);
-}
diff --git a/3rdparty/fmt/doc/bootstrap/dropdowns.less b/3rdparty/fmt/doc/bootstrap/dropdowns.less
deleted file mode 100644
index af344607..00000000
--- a/3rdparty/fmt/doc/bootstrap/dropdowns.less
+++ /dev/null
@@ -1,214 +0,0 @@
-//
-// Dropdown menus
-// --------------------------------------------------
-
-
-// Dropdown arrow/caret
-.caret {
-  display: inline-block;
-  width: 0;
-  height: 0;
-  margin-left: 2px;
-  vertical-align: middle;
-  border-top:   @caret-width-base dashed;
-  border-right: @caret-width-base solid transparent;
-  border-left:  @caret-width-base solid transparent;
-}
-
-// The dropdown wrapper (div)
-.dropup,
-.dropdown {
-  position: relative;
-}
-
-// Prevent the focus on the dropdown toggle when closing dropdowns
-.dropdown-toggle:focus {
-  outline: 0;
-}
-
-// The dropdown menu (ul)
-.dropdown-menu {
-  position: absolute;
-  top: 100%;
-  left: 0;
-  z-index: @zindex-dropdown;
-  display: none; // none by default, but block on "open" of the menu
-  float: left;
-  min-width: 160px;
-  padding: 5px 0;
-  margin: 2px 0 0; // override default ul
-  list-style: none;
-  font-size: @font-size-base;
-  text-align: left; // Ensures proper alignment if parent has it changed (e.g., modal footer)
-  background-color: @dropdown-bg;
-  border: 1px solid @dropdown-fallback-border; // IE8 fallback
-  border: 1px solid @dropdown-border;
-  border-radius: @border-radius-base;
-  .box-shadow(0 6px 12px rgba(0,0,0,.175));
-  background-clip: padding-box;
-
-  // Aligns the dropdown menu to right
-  //
-  // Deprecated as of 3.1.0 in favor of `.dropdown-menu-[dir]`
-  &.pull-right {
-    right: 0;
-    left: auto;
-  }
-
-  // Dividers (basically an hr) within the dropdown
-  .divider {
-    .nav-divider(@dropdown-divider-bg);
-  }
-
-  // Links within the dropdown menu
-  > li > a {
-    display: block;
-    padding: 3px 20px;
-    clear: both;
-    font-weight: normal;
-    line-height: @line-height-base;
-    color: @dropdown-link-color;
-    white-space: nowrap; // prevent links from randomly breaking onto new lines
-  }
-}
-
-// Hover/Focus state
-.dropdown-menu > li > a {
-  &:hover,
-  &:focus {
-    text-decoration: none;
-    color: @dropdown-link-hover-color;
-    background-color: @dropdown-link-hover-bg;
-  }
-}
-
-// Active state
-.dropdown-menu > .active > a {
-  &,
-  &:hover,
-  &:focus {
-    color: @dropdown-link-active-color;
-    text-decoration: none;
-    outline: 0;
-    background-color: @dropdown-link-active-bg;
-  }
-}
-
-// Disabled state
-//
-// Gray out text and ensure the hover/focus state remains gray
-
-.dropdown-menu > .disabled > a {
-  &,
-  &:hover,
-  &:focus {
-    color: @dropdown-link-disabled-color;
-  }
-
-  // Nuke hover/focus effects
-  &:hover,
-  &:focus {
-    text-decoration: none;
-    background-color: transparent;
-    background-image: none; // Remove CSS gradient
-    .reset-filter();
-    cursor: @cursor-disabled;
-  }
-}
-
-// Open state for the dropdown
-.open {
-  // Show the menu
-  > .dropdown-menu {
-    display: block;
-  }
-
-  // Remove the outline when :focus is triggered
-  > a {
-    outline: 0;
-  }
-}
-
-// Menu positioning
-//
-// Add extra class to `.dropdown-menu` to flip the alignment of the dropdown
-// menu with the parent.
-.dropdown-menu-right {
-  left: auto; // Reset the default from `.dropdown-menu`
-  right: 0;
-}
-// With v3, we enabled auto-flipping if you have a dropdown within a right
-// aligned nav component. To enable the undoing of that, we provide an override
-// to restore the default dropdown menu alignment.
-//
-// This is only for left-aligning a dropdown menu within a `.navbar-right` or
-// `.pull-right` nav component.
-.dropdown-menu-left {
-  left: 0;
-  right: auto;
-}
-
-// Dropdown section headers
-.dropdown-header {
-  display: block;
-  padding: 3px 20px;
-  font-size: @font-size-small;
-  line-height: @line-height-base;
-  color: @dropdown-header-color;
-  white-space: nowrap; // as with > li > a
-}
-
-// Backdrop to catch body clicks on mobile, etc.
-.dropdown-backdrop {
-  position: fixed;
-  left: 0;
-  right: 0;
-  bottom: 0;
-  top: 0;
-  z-index: (@zindex-dropdown - 10);
-}
-
-// Right aligned dropdowns
-.pull-right > .dropdown-menu {
-  right: 0;
-  left: auto;
-}
-
-// Allow for dropdowns to go bottom up (aka, dropup-menu)
-//
-// Just add .dropup after the standard .dropdown class and you're set, bro.
-// TODO: abstract this so that the navbar fixed styles are not placed here?
-
-.dropup,
-.navbar-fixed-bottom .dropdown {
-  // Reverse the caret
-  .caret {
-    border-top: 0;
-    border-bottom: @caret-width-base solid;
-    content: "";
-  }
-  // Different positioning for bottom up menu
-  .dropdown-menu {
-    top: auto;
-    bottom: 100%;
-    margin-bottom: 2px;
-  }
-}
-
-
-// Component alignment
-//
-// Reiterate per navbar.less and the modified component alignment there.
-
-@media (min-width: @grid-float-breakpoint) {
-  .navbar-right {
-    .dropdown-menu {
-      .dropdown-menu-right();
-    }
-    // Necessary for overrides of the default right aligned menu.
-    // Will remove come v4 in all likelihood.
-    .dropdown-menu-left {
-      .dropdown-menu-left();
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/forms.less b/3rdparty/fmt/doc/bootstrap/forms.less
deleted file mode 100644
index e4b50629..00000000
--- a/3rdparty/fmt/doc/bootstrap/forms.less
+++ /dev/null
@@ -1,574 +0,0 @@
-//
-// Forms
-// --------------------------------------------------
-
-
-// Normalize non-controls
-//
-// Restyle and baseline non-control form elements.
-
-fieldset {
-  padding: 0;
-  margin: 0;
-  border: 0;
-  // Chrome and Firefox set a `min-width: min-content;` on fieldsets,
-  // so we reset that to ensure it behaves more like a standard block element.
-  // See https://github.com/twbs/bootstrap/issues/12359.
-  min-width: 0;
-}
-
-legend {
-  display: block;
-  width: 100%;
-  padding: 0;
-  margin-bottom: @line-height-computed;
-  font-size: (@font-size-base * 1.5);
-  line-height: inherit;
-  color: @legend-color;
-  border: 0;
-  border-bottom: 1px solid @legend-border-color;
-}
-
-label {
-  display: inline-block;
-  max-width: 100%; // Force IE8 to wrap long content (see https://github.com/twbs/bootstrap/issues/13141)
-  margin-bottom: 5px;
-  font-weight: bold;
-}
-
-
-// Normalize form controls
-//
-// While most of our form styles require extra classes, some basic normalization
-// is required to ensure optimum display with or without those classes to better
-// address browser inconsistencies.
-
-// Override content-box in Normalize (* isn't specific enough)
-input[type="search"] {
-  .box-sizing(border-box);
-}
-
-// Position radios and checkboxes better
-input[type="radio"],
-input[type="checkbox"] {
-  margin: 4px 0 0;
-  margin-top: 1px \9; // IE8-9
-  line-height: normal;
-}
-
-// Set the height of file controls to match text inputs
-input[type="file"] {
-  display: block;
-}
-
-// Make range inputs behave like textual form controls
-input[type="range"] {
-  display: block;
-  width: 100%;
-}
-
-// Make multiple select elements height not fixed
-select[multiple],
-select[size] {
-  height: auto;
-}
-
-// Focus for file, radio, and checkbox
-input[type="file"]:focus,
-input[type="radio"]:focus,
-input[type="checkbox"]:focus {
-  .tab-focus();
-}
-
-// Adjust output element
-output {
-  display: block;
-  padding-top: (@padding-base-vertical + 1);
-  font-size: @font-size-base;
-  line-height: @line-height-base;
-  color: @input-color;
-}
-
-
-// Common form controls
-//
-// Shared size and type resets for form controls. Apply `.form-control` to any
-// of the following form controls:
-//
-// select
-// textarea
-// input[type="text"]
-// input[type="password"]
-// input[type="datetime"]
-// input[type="datetime-local"]
-// input[type="date"]
-// input[type="month"]
-// input[type="time"]
-// input[type="week"]
-// input[type="number"]
-// input[type="email"]
-// input[type="url"]
-// input[type="search"]
-// input[type="tel"]
-// input[type="color"]
-
-.form-control {
-  display: block;
-  width: 100%;
-  height: @input-height-base; // Make inputs at least the height of their button counterpart (base line-height + padding + border)
-  padding: @padding-base-vertical @padding-base-horizontal;
-  font-size: @font-size-base;
-  line-height: @line-height-base;
-  color: @input-color;
-  background-color: @input-bg;
-  background-image: none; // Reset unusual Firefox-on-Android default style; see https://github.com/necolas/normalize.css/issues/214
-  border: 1px solid @input-border;
-  border-radius: @input-border-radius; // Note: This has no effect on <select>s in some browsers, due to the limited stylability of <select>s in CSS.
-  .box-shadow(inset 0 1px 1px rgba(0,0,0,.075));
-  .transition(~"border-color ease-in-out .15s, box-shadow ease-in-out .15s");
-
-  // Customize the `:focus` state to imitate native WebKit styles.
-  .form-control-focus();
-
-  // Placeholder
-  .placeholder();
-
-  // Disabled and read-only inputs
-  //
-  // HTML5 says that controls under a fieldset > legend:first-child won't be
-  // disabled if the fieldset is disabled. Due to implementation difficulty, we
-  // don't honor that edge case; we style them as disabled anyway.
-  &[disabled],
-  &[readonly],
-  fieldset[disabled] & {
-    background-color: @input-bg-disabled;
-    opacity: 1; // iOS fix for unreadable disabled content; see https://github.com/twbs/bootstrap/issues/11655
-  }
-
-  &[disabled],
-  fieldset[disabled] & {
-    cursor: @cursor-disabled;
-  }
-
-  // Reset height for `textarea`s
-  textarea& {
-    height: auto;
-  }
-}
-
-
-// Search inputs in iOS
-//
-// This overrides the extra rounded corners on search inputs in iOS so that our
-// `.form-control` class can properly style them. Note that this cannot simply
-// be added to `.form-control` as it's not specific enough. For details, see
-// https://github.com/twbs/bootstrap/issues/11586.
-
-input[type="search"] {
-  -webkit-appearance: none;
-}
-
-
-// Special styles for iOS temporal inputs
-//
-// In Mobile Safari, setting `display: block` on temporal inputs causes the
-// text within the input to become vertically misaligned. As a workaround, we
-// set a pixel line-height that matches the given height of the input, but only
-// for Safari. See https://bugs.webkit.org/show_bug.cgi?id=139848
-
-@media screen and (-webkit-min-device-pixel-ratio: 0) {
-  input[type="date"],
-  input[type="time"],
-  input[type="datetime-local"],
-  input[type="month"] {
-    line-height: @input-height-base;
-
-    &.input-sm,
-    .input-group-sm & {
-      line-height: @input-height-small;
-    }
-
-    &.input-lg,
-    .input-group-lg & {
-      line-height: @input-height-large;
-    }
-  }
-}
-
-
-// Form groups
-//
-// Designed to help with the organization and spacing of vertical forms. For
-// horizontal forms, use the predefined grid classes.
-
-.form-group {
-  margin-bottom: @form-group-margin-bottom;
-}
-
-
-// Checkboxes and radios
-//
-// Indent the labels to position radios/checkboxes as hanging controls.
-
-.radio,
-.checkbox {
-  position: relative;
-  display: block;
-  margin-top: 10px;
-  margin-bottom: 10px;
-
-  label {
-    min-height: @line-height-computed; // Ensure the input doesn't jump when there is no text
-    padding-left: 20px;
-    margin-bottom: 0;
-    font-weight: normal;
-    cursor: pointer;
-  }
-}
-.radio input[type="radio"],
-.radio-inline input[type="radio"],
-.checkbox input[type="checkbox"],
-.checkbox-inline input[type="checkbox"] {
-  position: absolute;
-  margin-left: -20px;
-  margin-top: 4px \9;
-}
-
-.radio + .radio,
-.checkbox + .checkbox {
-  margin-top: -5px; // Move up sibling radios or checkboxes for tighter spacing
-}
-
-// Radios and checkboxes on same line
-.radio-inline,
-.checkbox-inline {
-  position: relative;
-  display: inline-block;
-  padding-left: 20px;
-  margin-bottom: 0;
-  vertical-align: middle;
-  font-weight: normal;
-  cursor: pointer;
-}
-.radio-inline + .radio-inline,
-.checkbox-inline + .checkbox-inline {
-  margin-top: 0;
-  margin-left: 10px; // space out consecutive inline controls
-}
-
-// Apply same disabled cursor tweak as for inputs
-// Some special care is needed because <label>s don't inherit their parent's `cursor`.
-//
-// Note: Neither radios nor checkboxes can be readonly.
-input[type="radio"],
-input[type="checkbox"] {
-  &[disabled],
-  &.disabled,
-  fieldset[disabled] & {
-    cursor: @cursor-disabled;
-  }
-}
-// These classes are used directly on <label>s
-.radio-inline,
-.checkbox-inline {
-  &.disabled,
-  fieldset[disabled] & {
-    cursor: @cursor-disabled;
-  }
-}
-// These classes are used on elements with <label> descendants
-.radio,
-.checkbox {
-  &.disabled,
-  fieldset[disabled] & {
-    label {
-      cursor: @cursor-disabled;
-    }
-  }
-}
-
-
-// Static form control text
-//
-// Apply class to a `p` element to make any string of text align with labels in
-// a horizontal form layout.
-
-.form-control-static {
-  // Size it appropriately next to real form controls
-  padding-top: (@padding-base-vertical + 1);
-  padding-bottom: (@padding-base-vertical + 1);
-  // Remove default margin from `p`
-  margin-bottom: 0;
-  min-height: (@line-height-computed + @font-size-base);
-
-  &.input-lg,
-  &.input-sm {
-    padding-left: 0;
-    padding-right: 0;
-  }
-}
-
-
-// Form control sizing
-//
-// Build on `.form-control` with modifier classes to decrease or increase the
-// height and font-size of form controls.
-//
-// The `.form-group-* form-control` variations are sadly duplicated to avoid the
-// issue documented in https://github.com/twbs/bootstrap/issues/15074.
-
-.input-sm {
-  .input-size(@input-height-small; @padding-small-vertical; @padding-small-horizontal; @font-size-small; @line-height-small; @input-border-radius-small);
-}
-.form-group-sm {
-  .form-control {
-    .input-size(@input-height-small; @padding-small-vertical; @padding-small-horizontal; @font-size-small; @line-height-small; @input-border-radius-small);
-  }
-  .form-control-static {
-    height: @input-height-small;
-    padding: @padding-small-vertical @padding-small-horizontal;
-    font-size: @font-size-small;
-    line-height: @line-height-small;
-    min-height: (@line-height-computed + @font-size-small);
-  }
-}
-
-.input-lg {
-  .input-size(@input-height-large; @padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @input-border-radius-large);
-}
-.form-group-lg {
-  .form-control {
-    .input-size(@input-height-large; @padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @input-border-radius-large);
-  }
-  .form-control-static {
-    height: @input-height-large;
-    padding: @padding-large-vertical @padding-large-horizontal;
-    font-size: @font-size-large;
-    line-height: @line-height-large;
-    min-height: (@line-height-computed + @font-size-large);
-  }
-}
-
-
-// Form control feedback states
-//
-// Apply contextual and semantic states to individual form controls.
-
-.has-feedback {
-  // Enable absolute positioning
-  position: relative;
-
-  // Ensure icons don't overlap text
-  .form-control {
-    padding-right: (@input-height-base * 1.25);
-  }
-}
-// Feedback icon (requires .glyphicon classes)
-.form-control-feedback {
-  position: absolute;
-  top: 0;
-  right: 0;
-  z-index: 2; // Ensure icon is above input groups
-  display: block;
-  width: @input-height-base;
-  height: @input-height-base;
-  line-height: @input-height-base;
-  text-align: center;
-  pointer-events: none;
-}
-.input-lg + .form-control-feedback {
-  width: @input-height-large;
-  height: @input-height-large;
-  line-height: @input-height-large;
-}
-.input-sm + .form-control-feedback {
-  width: @input-height-small;
-  height: @input-height-small;
-  line-height: @input-height-small;
-}
-
-// Feedback states
-.has-success {
-  .form-control-validation(@state-success-text; @state-success-text; @state-success-bg);
-}
-.has-warning {
-  .form-control-validation(@state-warning-text; @state-warning-text; @state-warning-bg);
-}
-.has-error {
-  .form-control-validation(@state-danger-text; @state-danger-text; @state-danger-bg);
-}
-
-// Reposition feedback icon if input has visible label above
-.has-feedback label {
-
-  & ~ .form-control-feedback {
-     top: (@line-height-computed + 5); // Height of the `label` and its margin
-  }
-  &.sr-only ~ .form-control-feedback {
-     top: 0;
-  }
-}
-
-
-// Help text
-//
-// Apply to any element you wish to create light text for placement immediately
-// below a form control. Use for general help, formatting, or instructional text.
-
-.help-block {
-  display: block; // account for any element using help-block
-  margin-top: 5px;
-  margin-bottom: 10px;
-  color: lighten(@text-color, 25%); // lighten the text some for contrast
-}
-
-
-// Inline forms
-//
-// Make forms appear inline(-block) by adding the `.form-inline` class. Inline
-// forms begin stacked on extra small (mobile) devices and then go inline when
-// viewports reach <768px.
-//
-// Requires wrapping inputs and labels with `.form-group` for proper display of
-// default HTML form controls and our custom form controls (e.g., input groups).
-//
-// Heads up! This is mixin-ed into `.navbar-form` in navbars.less.
-
-.form-inline {
-
-  // Kick in the inline
-  @media (min-width: @screen-sm-min) {
-    // Inline-block all the things for "inline"
-    .form-group {
-      display: inline-block;
-      margin-bottom: 0;
-      vertical-align: middle;
-    }
-
-    // In navbar-form, allow folks to *not* use `.form-group`
-    .form-control {
-      display: inline-block;
-      width: auto; // Prevent labels from stacking above inputs in `.form-group`
-      vertical-align: middle;
-    }
-
-    // Make static controls behave like regular ones
-    .form-control-static {
-      display: inline-block;
-    }
-
-    .input-group {
-      display: inline-table;
-      vertical-align: middle;
-
-      .input-group-addon,
-      .input-group-btn,
-      .form-control {
-        width: auto;
-      }
-    }
-
-    // Input groups need that 100% width though
-    .input-group > .form-control {
-      width: 100%;
-    }
-
-    .control-label {
-      margin-bottom: 0;
-      vertical-align: middle;
-    }
-
-    // Remove default margin on radios/checkboxes that were used for stacking, and
-    // then undo the floating of radios and checkboxes to match.
-    .radio,
-    .checkbox {
-      display: inline-block;
-      margin-top: 0;
-      margin-bottom: 0;
-      vertical-align: middle;
-
-      label {
-        padding-left: 0;
-      }
-    }
-    .radio input[type="radio"],
-    .checkbox input[type="checkbox"] {
-      position: relative;
-      margin-left: 0;
-    }
-
-    // Re-override the feedback icon.
-    .has-feedback .form-control-feedback {
-      top: 0;
-    }
-  }
-}
-
-
-// Horizontal forms
-//
-// Horizontal forms are built on grid classes and allow you to create forms with
-// labels on the left and inputs on the right.
-
-.form-horizontal {
-
-  // Consistent vertical alignment of radios and checkboxes
-  //
-  // Labels also get some reset styles, but that is scoped to a media query below.
-  .radio,
-  .checkbox,
-  .radio-inline,
-  .checkbox-inline {
-    margin-top: 0;
-    margin-bottom: 0;
-    padding-top: (@padding-base-vertical + 1); // Default padding plus a border
-  }
-  // Account for padding we're adding to ensure the alignment and of help text
-  // and other content below items
-  .radio,
-  .checkbox {
-    min-height: (@line-height-computed + (@padding-base-vertical + 1));
-  }
-
-  // Make form groups behave like rows
-  .form-group {
-    .make-row();
-  }
-
-  // Reset spacing and right align labels, but scope to media queries so that
-  // labels on narrow viewports stack the same as a default form example.
-  @media (min-width: @screen-sm-min) {
-    .control-label {
-      text-align: right;
-      margin-bottom: 0;
-      padding-top: (@padding-base-vertical + 1); // Default padding plus a border
-    }
-  }
-
-  // Validation states
-  //
-  // Reposition the icon because it's now within a grid column and columns have
-  // `position: relative;` on them. Also accounts for the grid gutter padding.
-  .has-feedback .form-control-feedback {
-    right: (@grid-gutter-width / 2);
-  }
-
-  // Form group sizes
-  //
-  // Quick utility class for applying `.input-lg` and `.input-sm` styles to the
-  // inputs and labels within a `.form-group`.
-  .form-group-lg {
-    @media (min-width: @screen-sm-min) {
-      .control-label {
-        padding-top: ((@padding-large-vertical * @line-height-large) + 1);
-      }
-    }
-  }
-  .form-group-sm {
-    @media (min-width: @screen-sm-min) {
-      .control-label {
-        padding-top: (@padding-small-vertical + 1);
-      }
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/glyphicons.less b/3rdparty/fmt/doc/bootstrap/glyphicons.less
deleted file mode 100644
index 335d80aa..00000000
--- a/3rdparty/fmt/doc/bootstrap/glyphicons.less
+++ /dev/null
@@ -1,305 +0,0 @@
-//
-// Glyphicons for Bootstrap
-//
-// Since icons are fonts, they can be placed anywhere text is placed and are
-// thus automatically sized to match the surrounding child. To use, create an
-// inline element with the appropriate classes, like so:
-//
-// <a href="#"><span class="glyphicon glyphicon-star"></span> Star</a>
-
-// Import the fonts
-@font-face {
-  font-family: 'Glyphicons Halflings';
-  src: url('@{icon-font-path}@{icon-font-name}.eot');
-  src: url('@{icon-font-path}@{icon-font-name}.eot?#iefix') format('embedded-opentype'),
-       url('@{icon-font-path}@{icon-font-name}.woff2') format('woff2'),
-       url('@{icon-font-path}@{icon-font-name}.woff') format('woff'),
-       url('@{icon-font-path}@{icon-font-name}.ttf') format('truetype'),
-       url('@{icon-font-path}@{icon-font-name}.svg#@{icon-font-svg-id}') format('svg');
-}
-
-// Catchall baseclass
-.glyphicon {
-  position: relative;
-  top: 1px;
-  display: inline-block;
-  font-family: 'Glyphicons Halflings';
-  font-style: normal;
-  font-weight: normal;
-  line-height: 1;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-}
-
-// Individual icons
-.glyphicon-asterisk               { &:before { content: "\2a"; } }
-.glyphicon-plus                   { &:before { content: "\2b"; } }
-.glyphicon-euro,
-.glyphicon-eur                    { &:before { content: "\20ac"; } }
-.glyphicon-minus                  { &:before { content: "\2212"; } }
-.glyphicon-cloud                  { &:before { content: "\2601"; } }
-.glyphicon-envelope               { &:before { content: "\2709"; } }
-.glyphicon-pencil                 { &:before { content: "\270f"; } }
-.glyphicon-glass                  { &:before { content: "\e001"; } }
-.glyphicon-music                  { &:before { content: "\e002"; } }
-.glyphicon-search                 { &:before { content: "\e003"; } }
-.glyphicon-heart                  { &:before { content: "\e005"; } }
-.glyphicon-star                   { &:before { content: "\e006"; } }
-.glyphicon-star-empty             { &:before { content: "\e007"; } }
-.glyphicon-user                   { &:before { content: "\e008"; } }
-.glyphicon-film                   { &:before { content: "\e009"; } }
-.glyphicon-th-large               { &:before { content: "\e010"; } }
-.glyphicon-th                     { &:before { content: "\e011"; } }
-.glyphicon-th-list                { &:before { content: "\e012"; } }
-.glyphicon-ok                     { &:before { content: "\e013"; } }
-.glyphicon-remove                 { &:before { content: "\e014"; } }
-.glyphicon-zoom-in                { &:before { content: "\e015"; } }
-.glyphicon-zoom-out               { &:before { content: "\e016"; } }
-.glyphicon-off                    { &:before { content: "\e017"; } }
-.glyphicon-signal                 { &:before { content: "\e018"; } }
-.glyphicon-cog                    { &:before { content: "\e019"; } }
-.glyphicon-trash                  { &:before { content: "\e020"; } }
-.glyphicon-home                   { &:before { content: "\e021"; } }
-.glyphicon-file                   { &:before { content: "\e022"; } }
-.glyphicon-time                   { &:before { content: "\e023"; } }
-.glyphicon-road                   { &:before { content: "\e024"; } }
-.glyphicon-download-alt           { &:before { content: "\e025"; } }
-.glyphicon-download               { &:before { content: "\e026"; } }
-.glyphicon-upload                 { &:before { content: "\e027"; } }
-.glyphicon-inbox                  { &:before { content: "\e028"; } }
-.glyphicon-play-circle            { &:before { content: "\e029"; } }
-.glyphicon-repeat                 { &:before { content: "\e030"; } }
-.glyphicon-refresh                { &:before { content: "\e031"; } }
-.glyphicon-list-alt               { &:before { content: "\e032"; } }
-.glyphicon-lock                   { &:before { content: "\e033"; } }
-.glyphicon-flag                   { &:before { content: "\e034"; } }
-.glyphicon-headphones             { &:before { content: "\e035"; } }
-.glyphicon-volume-off             { &:before { content: "\e036"; } }
-.glyphicon-volume-down            { &:before { content: "\e037"; } }
-.glyphicon-volume-up              { &:before { content: "\e038"; } }
-.glyphicon-qrcode                 { &:before { content: "\e039"; } }
-.glyphicon-barcode                { &:before { content: "\e040"; } }
-.glyphicon-tag                    { &:before { content: "\e041"; } }
-.glyphicon-tags                   { &:before { content: "\e042"; } }
-.glyphicon-book                   { &:before { content: "\e043"; } }
-.glyphicon-bookmark               { &:before { content: "\e044"; } }
-.glyphicon-print                  { &:before { content: "\e045"; } }
-.glyphicon-camera                 { &:before { content: "\e046"; } }
-.glyphicon-font                   { &:before { content: "\e047"; } }
-.glyphicon-bold                   { &:before { content: "\e048"; } }
-.glyphicon-italic                 { &:before { content: "\e049"; } }
-.glyphicon-text-height            { &:before { content: "\e050"; } }
-.glyphicon-text-width             { &:before { content: "\e051"; } }
-.glyphicon-align-left             { &:before { content: "\e052"; } }
-.glyphicon-align-center           { &:before { content: "\e053"; } }
-.glyphicon-align-right            { &:before { content: "\e054"; } }
-.glyphicon-align-justify          { &:before { content: "\e055"; } }
-.glyphicon-list                   { &:before { content: "\e056"; } }
-.glyphicon-indent-left            { &:before { content: "\e057"; } }
-.glyphicon-indent-right           { &:before { content: "\e058"; } }
-.glyphicon-facetime-video         { &:before { content: "\e059"; } }
-.glyphicon-picture                { &:before { content: "\e060"; } }
-.glyphicon-map-marker             { &:before { content: "\e062"; } }
-.glyphicon-adjust                 { &:before { content: "\e063"; } }
-.glyphicon-tint                   { &:before { content: "\e064"; } }
-.glyphicon-edit                   { &:before { content: "\e065"; } }
-.glyphicon-share                  { &:before { content: "\e066"; } }
-.glyphicon-check                  { &:before { content: "\e067"; } }
-.glyphicon-move                   { &:before { content: "\e068"; } }
-.glyphicon-step-backward          { &:before { content: "\e069"; } }
-.glyphicon-fast-backward          { &:before { content: "\e070"; } }
-.glyphicon-backward               { &:before { content: "\e071"; } }
-.glyphicon-play                   { &:before { content: "\e072"; } }
-.glyphicon-pause                  { &:before { content: "\e073"; } }
-.glyphicon-stop                   { &:before { content: "\e074"; } }
-.glyphicon-forward                { &:before { content: "\e075"; } }
-.glyphicon-fast-forward           { &:before { content: "\e076"; } }
-.glyphicon-step-forward           { &:before { content: "\e077"; } }
-.glyphicon-eject                  { &:before { content: "\e078"; } }
-.glyphicon-chevron-left           { &:before { content: "\e079"; } }
-.glyphicon-chevron-right          { &:before { content: "\e080"; } }
-.glyphicon-plus-sign              { &:before { content: "\e081"; } }
-.glyphicon-minus-sign             { &:before { content: "\e082"; } }
-.glyphicon-remove-sign            { &:before { content: "\e083"; } }
-.glyphicon-ok-sign                { &:before { content: "\e084"; } }
-.glyphicon-question-sign          { &:before { content: "\e085"; } }
-.glyphicon-info-sign              { &:before { content: "\e086"; } }
-.glyphicon-screenshot             { &:before { content: "\e087"; } }
-.glyphicon-remove-circle          { &:before { content: "\e088"; } }
-.glyphicon-ok-circle              { &:before { content: "\e089"; } }
-.glyphicon-ban-circle             { &:before { content: "\e090"; } }
-.glyphicon-arrow-left             { &:before { content: "\e091"; } }
-.glyphicon-arrow-right            { &:before { content: "\e092"; } }
-.glyphicon-arrow-up               { &:before { content: "\e093"; } }
-.glyphicon-arrow-down             { &:before { content: "\e094"; } }
-.glyphicon-share-alt              { &:before { content: "\e095"; } }
-.glyphicon-resize-full            { &:before { content: "\e096"; } }
-.glyphicon-resize-small           { &:before { content: "\e097"; } }
-.glyphicon-exclamation-sign       { &:before { content: "\e101"; } }
-.glyphicon-gift                   { &:before { content: "\e102"; } }
-.glyphicon-leaf                   { &:before { content: "\e103"; } }
-.glyphicon-fire                   { &:before { content: "\e104"; } }
-.glyphicon-eye-open               { &:before { content: "\e105"; } }
-.glyphicon-eye-close              { &:before { content: "\e106"; } }
-.glyphicon-warning-sign           { &:before { content: "\e107"; } }
-.glyphicon-plane                  { &:before { content: "\e108"; } }
-.glyphicon-calendar               { &:before { content: "\e109"; } }
-.glyphicon-random                 { &:before { content: "\e110"; } }
-.glyphicon-comment                { &:before { content: "\e111"; } }
-.glyphicon-magnet                 { &:before { content: "\e112"; } }
-.glyphicon-chevron-up             { &:before { content: "\e113"; } }
-.glyphicon-chevron-down           { &:before { content: "\e114"; } }
-.glyphicon-retweet                { &:before { content: "\e115"; } }
-.glyphicon-shopping-cart          { &:before { content: "\e116"; } }
-.glyphicon-folder-close           { &:before { content: "\e117"; } }
-.glyphicon-folder-open            { &:before { content: "\e118"; } }
-.glyphicon-resize-vertical        { &:before { content: "\e119"; } }
-.glyphicon-resize-horizontal      { &:before { content: "\e120"; } }
-.glyphicon-hdd                    { &:before { content: "\e121"; } }
-.glyphicon-bullhorn               { &:before { content: "\e122"; } }
-.glyphicon-bell                   { &:before { content: "\e123"; } }
-.glyphicon-certificate            { &:before { content: "\e124"; } }
-.glyphicon-thumbs-up              { &:before { content: "\e125"; } }
-.glyphicon-thumbs-down            { &:before { content: "\e126"; } }
-.glyphicon-hand-right             { &:before { content: "\e127"; } }
-.glyphicon-hand-left              { &:before { content: "\e128"; } }
-.glyphicon-hand-up                { &:before { content: "\e129"; } }
-.glyphicon-hand-down              { &:before { content: "\e130"; } }
-.glyphicon-circle-arrow-right     { &:before { content: "\e131"; } }
-.glyphicon-circle-arrow-left      { &:before { content: "\e132"; } }
-.glyphicon-circle-arrow-up        { &:before { content: "\e133"; } }
-.glyphicon-circle-arrow-down      { &:before { content: "\e134"; } }
-.glyphicon-globe                  { &:before { content: "\e135"; } }
-.glyphicon-wrench                 { &:before { content: "\e136"; } }
-.glyphicon-tasks                  { &:before { content: "\e137"; } }
-.glyphicon-filter                 { &:before { content: "\e138"; } }
-.glyphicon-briefcase              { &:before { content: "\e139"; } }
-.glyphicon-fullscreen             { &:before { content: "\e140"; } }
-.glyphicon-dashboard              { &:before { content: "\e141"; } }
-.glyphicon-paperclip              { &:before { content: "\e142"; } }
-.glyphicon-heart-empty            { &:before { content: "\e143"; } }
-.glyphicon-link                   { &:before { content: "\e144"; } }
-.glyphicon-phone                  { &:before { content: "\e145"; } }
-.glyphicon-pushpin                { &:before { content: "\e146"; } }
-.glyphicon-usd                    { &:before { content: "\e148"; } }
-.glyphicon-gbp                    { &:before { content: "\e149"; } }
-.glyphicon-sort                   { &:before { content: "\e150"; } }
-.glyphicon-sort-by-alphabet       { &:before { content: "\e151"; } }
-.glyphicon-sort-by-alphabet-alt   { &:before { content: "\e152"; } }
-.glyphicon-sort-by-order          { &:before { content: "\e153"; } }
-.glyphicon-sort-by-order-alt      { &:before { content: "\e154"; } }
-.glyphicon-sort-by-attributes     { &:before { content: "\e155"; } }
-.glyphicon-sort-by-attributes-alt { &:before { content: "\e156"; } }
-.glyphicon-unchecked              { &:before { content: "\e157"; } }
-.glyphicon-expand                 { &:before { content: "\e158"; } }
-.glyphicon-collapse-down          { &:before { content: "\e159"; } }
-.glyphicon-collapse-up            { &:before { content: "\e160"; } }
-.glyphicon-log-in                 { &:before { content: "\e161"; } }
-.glyphicon-flash                  { &:before { content: "\e162"; } }
-.glyphicon-log-out                { &:before { content: "\e163"; } }
-.glyphicon-new-window             { &:before { content: "\e164"; } }
-.glyphicon-record                 { &:before { content: "\e165"; } }
-.glyphicon-save                   { &:before { content: "\e166"; } }
-.glyphicon-open                   { &:before { content: "\e167"; } }
-.glyphicon-saved                  { &:before { content: "\e168"; } }
-.glyphicon-import                 { &:before { content: "\e169"; } }
-.glyphicon-export                 { &:before { content: "\e170"; } }
-.glyphicon-send                   { &:before { content: "\e171"; } }
-.glyphicon-floppy-disk            { &:before { content: "\e172"; } }
-.glyphicon-floppy-saved           { &:before { content: "\e173"; } }
-.glyphicon-floppy-remove          { &:before { content: "\e174"; } }
-.glyphicon-floppy-save            { &:before { content: "\e175"; } }
-.glyphicon-floppy-open            { &:before { content: "\e176"; } }
-.glyphicon-credit-card            { &:before { content: "\e177"; } }
-.glyphicon-transfer               { &:before { content: "\e178"; } }
-.glyphicon-cutlery                { &:before { content: "\e179"; } }
-.glyphicon-header                 { &:before { content: "\e180"; } }
-.glyphicon-compressed             { &:before { content: "\e181"; } }
-.glyphicon-earphone               { &:before { content: "\e182"; } }
-.glyphicon-phone-alt              { &:before { content: "\e183"; } }
-.glyphicon-tower                  { &:before { content: "\e184"; } }
-.glyphicon-stats                  { &:before { content: "\e185"; } }
-.glyphicon-sd-video               { &:before { content: "\e186"; } }
-.glyphicon-hd-video               { &:before { content: "\e187"; } }
-.glyphicon-subtitles              { &:before { content: "\e188"; } }
-.glyphicon-sound-stereo           { &:before { content: "\e189"; } }
-.glyphicon-sound-dolby            { &:before { content: "\e190"; } }
-.glyphicon-sound-5-1              { &:before { content: "\e191"; } }
-.glyphicon-sound-6-1              { &:before { content: "\e192"; } }
-.glyphicon-sound-7-1              { &:before { content: "\e193"; } }
-.glyphicon-copyright-mark         { &:before { content: "\e194"; } }
-.glyphicon-registration-mark      { &:before { content: "\e195"; } }
-.glyphicon-cloud-download         { &:before { content: "\e197"; } }
-.glyphicon-cloud-upload           { &:before { content: "\e198"; } }
-.glyphicon-tree-conifer           { &:before { content: "\e199"; } }
-.glyphicon-tree-deciduous         { &:before { content: "\e200"; } }
-.glyphicon-cd                     { &:before { content: "\e201"; } }
-.glyphicon-save-file              { &:before { content: "\e202"; } }
-.glyphicon-open-file              { &:before { content: "\e203"; } }
-.glyphicon-level-up               { &:before { content: "\e204"; } }
-.glyphicon-copy                   { &:before { content: "\e205"; } }
-.glyphicon-paste                  { &:before { content: "\e206"; } }
-// The following 2 Glyphicons are omitted for the time being because
-// they currently use Unicode codepoints that are outside the
-// Basic Multilingual Plane (BMP). Older buggy versions of WebKit can't handle
-// non-BMP codepoints in CSS string escapes, and thus can't display these two icons.
-// Notably, the bug affects some older versions of the Android Browser.
-// More info: https://github.com/twbs/bootstrap/issues/10106
-// .glyphicon-door                   { &:before { content: "\1f6aa"; } }
-// .glyphicon-key                    { &:before { content: "\1f511"; } }
-.glyphicon-alert                  { &:before { content: "\e209"; } }
-.glyphicon-equalizer              { &:before { content: "\e210"; } }
-.glyphicon-king                   { &:before { content: "\e211"; } }
-.glyphicon-queen                  { &:before { content: "\e212"; } }
-.glyphicon-pawn                   { &:before { content: "\e213"; } }
-.glyphicon-bishop                 { &:before { content: "\e214"; } }
-.glyphicon-knight                 { &:before { content: "\e215"; } }
-.glyphicon-baby-formula           { &:before { content: "\e216"; } }
-.glyphicon-tent                   { &:before { content: "\26fa"; } }
-.glyphicon-blackboard             { &:before { content: "\e218"; } }
-.glyphicon-bed                    { &:before { content: "\e219"; } }
-.glyphicon-apple                  { &:before { content: "\f8ff"; } }
-.glyphicon-erase                  { &:before { content: "\e221"; } }
-.glyphicon-hourglass              { &:before { content: "\231b"; } }
-.glyphicon-lamp                   { &:before { content: "\e223"; } }
-.glyphicon-duplicate              { &:before { content: "\e224"; } }
-.glyphicon-piggy-bank             { &:before { content: "\e225"; } }
-.glyphicon-scissors               { &:before { content: "\e226"; } }
-.glyphicon-bitcoin                { &:before { content: "\e227"; } }
-.glyphicon-btc                    { &:before { content: "\e227"; } }
-.glyphicon-xbt                    { &:before { content: "\e227"; } }
-.glyphicon-yen                    { &:before { content: "\00a5"; } }
-.glyphicon-jpy                    { &:before { content: "\00a5"; } }
-.glyphicon-ruble                  { &:before { content: "\20bd"; } }
-.glyphicon-rub                    { &:before { content: "\20bd"; } }
-.glyphicon-scale                  { &:before { content: "\e230"; } }
-.glyphicon-ice-lolly              { &:before { content: "\e231"; } }
-.glyphicon-ice-lolly-tasted       { &:before { content: "\e232"; } }
-.glyphicon-education              { &:before { content: "\e233"; } }
-.glyphicon-option-horizontal      { &:before { content: "\e234"; } }
-.glyphicon-option-vertical        { &:before { content: "\e235"; } }
-.glyphicon-menu-hamburger         { &:before { content: "\e236"; } }
-.glyphicon-modal-window           { &:before { content: "\e237"; } }
-.glyphicon-oil                    { &:before { content: "\e238"; } }
-.glyphicon-grain                  { &:before { content: "\e239"; } }
-.glyphicon-sunglasses             { &:before { content: "\e240"; } }
-.glyphicon-text-size              { &:before { content: "\e241"; } }
-.glyphicon-text-color             { &:before { content: "\e242"; } }
-.glyphicon-text-background        { &:before { content: "\e243"; } }
-.glyphicon-object-align-top       { &:before { content: "\e244"; } }
-.glyphicon-object-align-bottom    { &:before { content: "\e245"; } }
-.glyphicon-object-align-horizontal{ &:before { content: "\e246"; } }
-.glyphicon-object-align-left      { &:before { content: "\e247"; } }
-.glyphicon-object-align-vertical  { &:before { content: "\e248"; } }
-.glyphicon-object-align-right     { &:before { content: "\e249"; } }
-.glyphicon-triangle-right         { &:before { content: "\e250"; } }
-.glyphicon-triangle-left          { &:before { content: "\e251"; } }
-.glyphicon-triangle-bottom        { &:before { content: "\e252"; } }
-.glyphicon-triangle-top           { &:before { content: "\e253"; } }
-.glyphicon-console                { &:before { content: "\e254"; } }
-.glyphicon-superscript            { &:before { content: "\e255"; } }
-.glyphicon-subscript              { &:before { content: "\e256"; } }
-.glyphicon-menu-left              { &:before { content: "\e257"; } }
-.glyphicon-menu-right             { &:before { content: "\e258"; } }
-.glyphicon-menu-down              { &:before { content: "\e259"; } }
-.glyphicon-menu-up                { &:before { content: "\e260"; } }
diff --git a/3rdparty/fmt/doc/bootstrap/grid.less b/3rdparty/fmt/doc/bootstrap/grid.less
deleted file mode 100644
index 2e61c942..00000000
--- a/3rdparty/fmt/doc/bootstrap/grid.less
+++ /dev/null
@@ -1,84 +0,0 @@
-//
-// Grid system
-// --------------------------------------------------
-
-
-// Container widths
-//
-// Set the container width, and override it for fixed navbars in media queries.
-
-.tb-container {
-  .container-fixed();
-
-  @media (min-width: @screen-sm-min) {
-    width: @container-sm;
-  }
-  @media (min-width: @screen-md-min) {
-    width: @container-md;
-  }
-  @media (min-width: @screen-lg-min) {
-    width: @container-lg;
-  }
-}
-
-
-// Fluid container
-//
-// Utilizes the mixin meant for fixed width containers, but without any defined
-// width for fluid, full width layouts.
-
-.container-fluid {
-  .container-fixed();
-}
-
-
-// Row
-//
-// Rows contain and clear the floats of your columns.
-
-.row {
-  .make-row();
-}
-
-
-// Columns
-//
-// Common styles for small and large grid columns
-
-.make-grid-columns();
-
-
-// Extra small grid
-//
-// Columns, offsets, pushes, and pulls for extra small devices like
-// smartphones.
-
-.make-grid(xs);
-
-
-// Small grid
-//
-// Columns, offsets, pushes, and pulls for the small device range, from phones
-// to tablets.
-
-@media (min-width: @screen-sm-min) {
-  .make-grid(sm);
-}
-
-
-// Medium grid
-//
-// Columns, offsets, pushes, and pulls for the desktop device range.
-
-@media (min-width: @screen-md-min) {
-  .make-grid(md);
-}
-
-
-// Large grid
-//
-// Columns, offsets, pushes, and pulls for the large desktop device range.
-
-@media (min-width: @screen-lg-min) {
-  .make-grid(lg);
-}
diff --git a/3rdparty/fmt/doc/bootstrap/input-groups.less b/3rdparty/fmt/doc/bootstrap/input-groups.less
deleted file mode 100644
index a8712f25..00000000
--- a/3rdparty/fmt/doc/bootstrap/input-groups.less
+++ /dev/null
@@ -1,166 +0,0 @@
-//
-// Input groups
-// --------------------------------------------------
-
-// Base styles
-// -------------------------
-.input-group {
-  position: relative; // For dropdowns
-  display: table;
-  border-collapse: separate; // prevent input groups from inheriting border styles from table cells when placed within a table
-
-  // Undo padding and float of grid classes
-  &[class*="col-"] {
-    float: none;
-    padding-left: 0;
-    padding-right: 0;
-  }
-
-  .form-control {
-    // Ensure that the input is always above the *appended* addon button for
-    // proper border colors.
-    position: relative;
-    z-index: 2;
-
-    // IE9 fubars the placeholder attribute in text inputs and the arrows on
-    // select elements in input groups. To fix it, we float the input. Details:
-    // https://github.com/twbs/bootstrap/issues/11561#issuecomment-28936855
-    float: left;
-
-    width: 100%;
-    margin-bottom: 0;
-  }
-}
-
-// Sizing options
-//
-// Remix the default form control sizing classes into new ones for easier
-// manipulation.
-
-.input-group-lg > .form-control,
-.input-group-lg > .input-group-addon,
-.input-group-lg > .input-group-btn > .btn {
-  .input-lg();
-}
-.input-group-sm > .form-control,
-.input-group-sm > .input-group-addon,
-.input-group-sm > .input-group-btn > .btn {
-  .input-sm();
-}
-
-
-// Display as table-cell
-// -------------------------
-.input-group-addon,
-.input-group-btn,
-.input-group .form-control {
-  display: table-cell;
-
-  &:not(:first-child):not(:last-child) {
-    border-radius: 0;
-  }
-}
-// Addon and addon wrapper for buttons
-.input-group-addon,
-.input-group-btn {
-  width: 1%;
-  white-space: nowrap;
-  vertical-align: middle; // Match the inputs
-}
-
-// Text input groups
-// -------------------------
-.input-group-addon {
-  padding: @padding-base-vertical @padding-base-horizontal;
-  font-size: @font-size-base;
-  font-weight: normal;
-  line-height: 1;
-  color: @input-color;
-  text-align: center;
-  background-color: @input-group-addon-bg;
-  border: 1px solid @input-group-addon-border-color;
-  border-radius: @border-radius-base;
-
-  // Sizing
-  &.input-sm {
-    padding: @padding-small-vertical @padding-small-horizontal;
-    font-size: @font-size-small;
-    border-radius: @border-radius-small;
-  }
-  &.input-lg {
-    padding: @padding-large-vertical @padding-large-horizontal;
-    font-size: @font-size-large;
-    border-radius: @border-radius-large;
-  }
-
-  // Nuke default margins from checkboxes and radios to vertically center within.
-  input[type="radio"],
-  input[type="checkbox"] {
-    margin-top: 0;
-  }
-}
-
-// Reset rounded corners
-.input-group .form-control:first-child,
-.input-group-addon:first-child,
-.input-group-btn:first-child > .btn,
-.input-group-btn:first-child > .btn-group > .btn,
-.input-group-btn:first-child > .dropdown-toggle,
-.input-group-btn:last-child > .btn:not(:last-child):not(.dropdown-toggle),
-.input-group-btn:last-child > .btn-group:not(:last-child) > .btn {
-  .border-right-radius(0);
-}
-.input-group-addon:first-child {
-  border-right: 0;
-}
-.input-group .form-control:last-child,
-.input-group-addon:last-child,
-.input-group-btn:last-child > .btn,
-.input-group-btn:last-child > .btn-group > .btn,
-.input-group-btn:last-child > .dropdown-toggle,
-.input-group-btn:first-child > .btn:not(:first-child),
-.input-group-btn:first-child > .btn-group:not(:first-child) > .btn {
-  .border-left-radius(0);
-}
-.input-group-addon:last-child {
-  border-left: 0;
-}
-
-// Button input groups
-// -------------------------
-.input-group-btn {
-  position: relative;
-  // Jankily prevent input button groups from wrapping with `white-space` and
-  // `font-size` in combination with `inline-block` on buttons.
-  font-size: 0;
-  white-space: nowrap;
-
-  // Negative margin for spacing, position for bringing hovered/focused/actived
-  // element above the siblings.
-  > .btn {
-    position: relative;
-    + .btn {
-      margin-left: -1px;
-    }
-    // Bring the "active" button to the front
-    &:hover,
-    &:focus,
-    &:active {
-      z-index: 2;
-    }
-  }
-
-  // Negative margin to only have a 1px border between the two
-  &:first-child {
-    > .btn,
-    > .btn-group {
-      margin-right: -1px;
-    }
-  }
-  &:last-child {
-    > .btn,
-    > .btn-group {
-      margin-left: -1px;
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/jumbotron.less b/3rdparty/fmt/doc/bootstrap/jumbotron.less
deleted file mode 100644
index 909580f9..00000000
--- a/3rdparty/fmt/doc/bootstrap/jumbotron.less
+++ /dev/null
@@ -1,50 +0,0 @@
-//
-// Jumbotron
-// --------------------------------------------------
-
-
-.jumbotron {
-  padding: @jumbotron-padding (@jumbotron-padding / 2);
-  margin-bottom: @jumbotron-padding;
-  color: @jumbotron-color;
-  background-color: @jumbotron-bg;
-
-  h1,
-  .h1 {
-    color: @jumbotron-heading-color;
-  }
-
-  p {
-    margin-bottom: (@jumbotron-padding / 2);
-    font-size: @jumbotron-font-size;
-    font-weight: 200;
-  }
-
-  > hr {
-    border-top-color: darken(@jumbotron-bg, 10%);
-  }
-
-  .tb-container &,
-  .container-fluid & {
-    border-radius: @border-radius-large; // Only round corners at higher resolutions if contained in a container
-  }
-
-  .tb-container {
-    max-width: 100%;
-  }
-
-  @media screen and (min-width: @screen-sm-min) {
-    padding: (@jumbotron-padding * 1.6) 0;
-
-    .tb-container &,
-    .container-fluid & {
-      padding-left:  (@jumbotron-padding * 2);
-      padding-right: (@jumbotron-padding * 2);
-    }
-
-    h1,
-    .h1 {
-      font-size: (@font-size-base * 4.5);
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/labels.less b/3rdparty/fmt/doc/bootstrap/labels.less
deleted file mode 100644
index 9a5a2700..00000000
--- a/3rdparty/fmt/doc/bootstrap/labels.less
+++ /dev/null
@@ -1,64 +0,0 @@
-//
-// Labels
-// --------------------------------------------------
-
-.label {
-  display: inline;
-  padding: .2em .6em .3em;
-  font-size: 75%;
-  font-weight: bold;
-  line-height: 1;
-  color: @label-color;
-  text-align: center;
-  white-space: nowrap;
-  vertical-align: baseline;
-  border-radius: .25em;
-
-  // Add hover effects, but only for links
-  a& {
-    &:hover,
-    &:focus {
-      color: @label-link-hover-color;
-      text-decoration: none;
-      cursor: pointer;
-    }
-  }
-
-  // Empty labels collapse automatically (not available in IE8)
-  &:empty {
-    display: none;
-  }
-
-  // Quick fix for labels in buttons
-  .btn & {
-    position: relative;
-    top: -1px;
-  }
-}
-
-// Colors
-// Contextual variations (linked labels get darker on :hover)
-
-.label-default {
-  .label-variant(@label-default-bg);
-}
-
-.label-primary {
-  .label-variant(@label-primary-bg);
-}
-
-.label-success {
-  .label-variant(@label-success-bg);
-}
-
-.label-info {
-  .label-variant(@label-info-bg);
-}
-
-.label-warning {
-  .label-variant(@label-warning-bg);
-}
-
-.label-danger {
-  .label-variant(@label-danger-bg);
-}
diff --git a/3rdparty/fmt/doc/bootstrap/list-group.less b/3rdparty/fmt/doc/bootstrap/list-group.less
deleted file mode 100644
index 1462ce16..00000000
--- a/3rdparty/fmt/doc/bootstrap/list-group.less
+++ /dev/null
@@ -1,124 +0,0 @@
-//
-// List groups
-// --------------------------------------------------
-
-
-// Base class
-//
-// Easily usable on <ul>, <ol>, or <div>.
-
-.list-group {
-  // No need to set list-style: none; since .list-group-item is block level
-  margin-bottom: 20px;
-  padding-left: 0; // reset padding because ul and ol
-}
-
-
-// Individual list items
-//
-// Use on `li`s or `div`s within the `.list-group` parent.
-
-.list-group-item {
-  position: relative;
-  display: block;
-  padding: 10px 15px;
-  // Place the border on the list items and negative margin up for better styling
-  margin-bottom: -1px;
-  background-color: @list-group-bg;
-  border: 1px solid @list-group-border;
-
-  // Round the first and last items
-  &:first-child {
-    .border-top-radius(@list-group-border-radius);
-  }
-  &:last-child {
-    margin-bottom: 0;
-    .border-bottom-radius(@list-group-border-radius);
-  }
-}
-
-
-// Linked list items
-//
-// Use anchor elements instead of `li`s or `div`s to create linked list items.
-// Includes an extra `.active` modifier class for showing selected items.
-
-a.list-group-item {
-  color: @list-group-link-color;
-
-  .list-group-item-heading {
-    color: @list-group-link-heading-color;
-  }
-
-  // Hover state
-  &:hover,
-  &:focus {
-    text-decoration: none;
-    color: @list-group-link-hover-color;
-    background-color: @list-group-hover-bg;
-  }
-}
-
-.list-group-item {
-  // Disabled state
-  &.disabled,
-  &.disabled:hover,
-  &.disabled:focus {
-    background-color: @list-group-disabled-bg;
-    color: @list-group-disabled-color;
-    cursor: @cursor-disabled;
-
-    // Force color to inherit for custom content
-    .list-group-item-heading {
-      color: inherit;
-    }
-    .list-group-item-text {
-      color: @list-group-disabled-text-color;
-    }
-  }
-
-  // Active class on item itself, not parent
-  &.active,
-  &.active:hover,
-  &.active:focus {
-    z-index: 2; // Place active items above their siblings for proper border styling
-    color: @list-group-active-color;
-    background-color: @list-group-active-bg;
-    border-color: @list-group-active-border;
-
-    // Force color to inherit for custom content
-    .list-group-item-heading,
-    .list-group-item-heading > small,
-    .list-group-item-heading > .small {
-      color: inherit;
-    }
-    .list-group-item-text {
-      color: @list-group-active-text-color;
-    }
-  }
-}
-
-
-// Contextual variants
-//
-// Add modifier classes to change text and background color on individual items.
-// Organizationally, this must come after the `:hover` states.
-
-.list-group-item-variant(success; @state-success-bg; @state-success-text);
-.list-group-item-variant(info; @state-info-bg; @state-info-text);
-.list-group-item-variant(warning; @state-warning-bg; @state-warning-text);
-.list-group-item-variant(danger; @state-danger-bg; @state-danger-text);
-
-
-// Custom content options
-//
-// Extra classes for creating well-formatted content within `.list-group-item`s.
-
-.list-group-item-heading {
-  margin-top: 0;
-  margin-bottom: 5px;
-}
-.list-group-item-text {
-  margin-bottom: 0;
-  line-height: 1.3;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/media.less b/3rdparty/fmt/doc/bootstrap/media.less
deleted file mode 100644
index a6bf7819..00000000
--- a/3rdparty/fmt/doc/bootstrap/media.less
+++ /dev/null
@@ -1,61 +0,0 @@
-.media {
-  // Proper spacing between instances of .media
-  margin-top: 15px;
-
-  &:first-child {
-    margin-top: 0;
-  }
-}
-
-.media,
-.media-body {
-  zoom: 1;
-  overflow: hidden;
-}
-
-.media-body {
-  width: 10000px;
-}
-
-.media-object {
-  display: block;
-}
-
-.media-right,
-.media > .pull-right {
-  padding-left: 10px;
-}
-
-.media-left,
-.media > .pull-left {
-  padding-right: 10px;
-}
-
-.media-left,
-.media-right,
-.media-body {
-  display: table-cell;
-  vertical-align: top;
-}
-
-.media-middle {
-  vertical-align: middle;
-}
-
-.media-bottom {
-  vertical-align: bottom;
-}
-
-// Reset margins on headings for tighter default spacing
-.media-heading {
-  margin-top: 0;
-  margin-bottom: 5px;
-}
-
-// Media list variation
-//
-// Undo default ul/ol styles
-.media-list {
-  padding-left: 0;
-  list-style: none;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins.less b/3rdparty/fmt/doc/bootstrap/mixins.less
deleted file mode 100644
index af4408fc..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins.less
+++ /dev/null
@@ -1,39 +0,0 @@
-// Mixins
-// --------------------------------------------------
-
-// Utilities
-@import "mixins/hide-text.less";
-@import "mixins/opacity.less";
-@import "mixins/image.less";
-@import "mixins/labels.less";
-@import "mixins/reset-filter.less";
-@import "mixins/resize.less";
-@import "mixins/responsive-visibility.less";
-@import "mixins/size.less";
-@import "mixins/tab-focus.less";
-@import "mixins/text-emphasis.less";
-@import "mixins/text-overflow.less";
-@import "mixins/vendor-prefixes.less";
-
-// Components
-@import "mixins/alerts.less";
-@import "mixins/buttons.less";
-@import "mixins/panels.less";
-@import "mixins/pagination.less";
-@import "mixins/list-group.less";
-@import "mixins/nav-divider.less";
-@import "mixins/forms.less";
-@import "mixins/progress-bar.less";
-@import "mixins/table-row.less";
-
-// Skins
-@import "mixins/background-variant.less";
-@import "mixins/border-radius.less";
-@import "mixins/gradients.less";
-
-// Layout
-@import "mixins/clearfix.less";
-@import "mixins/center-block.less";
-@import "mixins/nav-vertical-align.less";
-@import "mixins/grid-framework.less";
-@import "mixins/grid.less";
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/alerts.less b/3rdparty/fmt/doc/bootstrap/mixins/alerts.less
deleted file mode 100644
index 396196f4..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/alerts.less
+++ /dev/null
@@ -1,14 +0,0 @@
-// Alerts
-
-.alert-variant(@background; @border; @text-color) {
-  background-color: @background;
-  border-color: @border;
-  color: @text-color;
-
-  hr {
-    border-top-color: darken(@border, 5%);
-  }
-  .alert-link {
-    color: darken(@text-color, 10%);
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/background-variant.less b/3rdparty/fmt/doc/bootstrap/mixins/background-variant.less
deleted file mode 100644
index 556e490d..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/background-variant.less
+++ /dev/null
@@ -1,8 +0,0 @@
-// Contextual backgrounds
-
-.bg-variant(@color) {
-  background-color: @color;
-  a&:hover {
-    background-color: darken(@color, 10%);
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/border-radius.less b/3rdparty/fmt/doc/bootstrap/mixins/border-radius.less
deleted file mode 100644
index ca05dbf4..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/border-radius.less
+++ /dev/null
@@ -1,18 +0,0 @@
-// Single side border-radius
-
-.border-top-radius(@radius) {
-  border-top-right-radius: @radius;
-   border-top-left-radius: @radius;
-}
-.border-right-radius(@radius) {
-  border-bottom-right-radius: @radius;
-     border-top-right-radius: @radius;
-}
-.border-bottom-radius(@radius) {
-  border-bottom-right-radius: @radius;
-   border-bottom-left-radius: @radius;
-}
-.border-left-radius(@radius) {
-  border-bottom-left-radius: @radius;
-     border-top-left-radius: @radius;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/buttons.less b/3rdparty/fmt/doc/bootstrap/mixins/buttons.less
deleted file mode 100644
index 92d8a056..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/buttons.less
+++ /dev/null
@@ -1,52 +0,0 @@
-// Button variants
-//
-// Easily pump out default styles, as well as :hover, :focus, :active,
-// and disabled options for all buttons
-
-.button-variant(@color; @background; @border) {
-  color: @color;
-  background-color: @background;
-  border-color: @border;
-
-  &:hover,
-  &:focus,
-  &.focus,
-  &:active,
-  &.active,
-  .open > .dropdown-toggle& {
-    color: @color;
-    background-color: darken(@background, 10%);
-        border-color: darken(@border, 12%);
-  }
-  &:active,
-  &.active,
-  .open > .dropdown-toggle& {
-    background-image: none;
-  }
-  &.disabled,
-  &[disabled],
-  fieldset[disabled] & {
-    &,
-    &:hover,
-    &:focus,
-    &.focus,
-    &:active,
-    &.active {
-      background-color: @background;
-          border-color: @border;
-    }
-  }
-
-  .badge {
-    color: @background;
-    background-color: @color;
-  }
-}
-
-// Button sizes
-.button-size(@padding-vertical; @padding-horizontal; @font-size; @line-height; @border-radius) {
-  padding: @padding-vertical @padding-horizontal;
-  font-size: @font-size;
-  line-height: @line-height;
-  border-radius: @border-radius;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/center-block.less b/3rdparty/fmt/doc/bootstrap/mixins/center-block.less
deleted file mode 100644
index d18d6de9..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/center-block.less
+++ /dev/null
@@ -1,7 +0,0 @@
-// Center-align a block level element
-
-.center-block() {
-  display: block;
-  margin-left: auto;
-  margin-right: auto;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/clearfix.less b/3rdparty/fmt/doc/bootstrap/mixins/clearfix.less
deleted file mode 100644
index 3f7a3820..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/clearfix.less
+++ /dev/null
@@ -1,22 +0,0 @@
-// Clearfix
-//
-// For modern browsers
-// 1. The space content is one way to avoid an Opera bug when the
-//    contenteditable attribute is included anywhere else in the document.
-//    Otherwise it causes space to appear at the top and bottom of elements
-//    that are clearfixed.
-// 2. The use of `table` rather than `block` is only necessary if using
-//    `:before` to contain the top-margins of child elements.
-//
-// Source: http://nicolasgallagher.com/micro-clearfix-hack/
-
-.clearfix() {
-  &:before,
-  &:after {
-    content: " "; // 1
-    display: table; // 2
-  }
-  &:after {
-    clear: both;
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/forms.less b/3rdparty/fmt/doc/bootstrap/mixins/forms.less
deleted file mode 100644
index 6f55ed96..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/forms.less
+++ /dev/null
@@ -1,85 +0,0 @@
-// Form validation states
-//
-// Used in forms.less to generate the form validation CSS for warnings, errors,
-// and successes.
-
-.form-control-validation(@text-color: #555; @border-color: #ccc; @background-color: #f5f5f5) {
-  // Color the label and help text
-  .help-block,
-  .control-label,
-  .radio,
-  .checkbox,
-  .radio-inline,
-  .checkbox-inline,
-  &.radio label,
-  &.checkbox label,
-  &.radio-inline label,
-  &.checkbox-inline label  {
-    color: @text-color;
-  }
-  // Set the border and box shadow on specific inputs to match
-  .form-control {
-    border-color: @border-color;
-    .box-shadow(inset 0 1px 1px rgba(0,0,0,.075)); // Redeclare so transitions work
-    &:focus {
-      border-color: darken(@border-color, 10%);
-      @shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 6px lighten(@border-color, 20%);
-      .box-shadow(@shadow);
-    }
-  }
-  // Set validation states also for addons
-  .input-group-addon {
-    color: @text-color;
-    border-color: @border-color;
-    background-color: @background-color;
-  }
-  // Optional feedback icon
-  .form-control-feedback {
-    color: @text-color;
-  }
-}
-
-
-// Form control focus state
-//
-// Generate a customized focus state and for any input with the specified color,
-// which defaults to the `@input-border-focus` variable.
-//
-// We highly encourage you to not customize the default value, but instead use
-// this to tweak colors on an as-needed basis. This aesthetic change is based on
-// WebKit's default styles, but applicable to a wider range of browsers. Its
-// usability and accessibility should be taken into account with any change.
-//
-// Example usage: change the default blue border and shadow to white for better
-// contrast against a dark gray background.
-.form-control-focus(@color: @input-border-focus) {
-  @color-rgba: rgba(red(@color), green(@color), blue(@color), .6);
-  &:focus {
-    border-color: @color;
-    outline: 0;
-    .box-shadow(~"inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px @{color-rgba}");
-  }
-}
-
-// Form control sizing
-//
-// Relative text size, padding, and border-radii changes for form controls. For
-// horizontal sizing, wrap controls in the predefined grid classes. `<select>`
-// element gets special love because it's special, and that's a fact!
-.input-size(@input-height; @padding-vertical; @padding-horizontal; @font-size; @line-height; @border-radius) {
-  height: @input-height;
-  padding: @padding-vertical @padding-horizontal;
-  font-size: @font-size;
-  line-height: @line-height;
-  border-radius: @border-radius;
-
-  select& {
-    height: @input-height;
-    line-height: @input-height;
-  }
-
-  textarea&,
-  select[multiple]& {
-    height: auto;
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/gradients.less b/3rdparty/fmt/doc/bootstrap/mixins/gradients.less
deleted file mode 100644
index 0b88a89c..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/gradients.less
+++ /dev/null
@@ -1,59 +0,0 @@
-// Gradients
-
-#gradient {
-
-  // Horizontal gradient, from left to right
-  //
-  // Creates two color stops, start and end, by specifying a color and position for each color stop.
-  // Color stops are not available in IE9 and below.
-  .horizontal(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) {
-    background-image: -webkit-linear-gradient(left, @start-color @start-percent, @end-color @end-percent); // Safari 5.1-6, Chrome 10+
-    background-image: -o-linear-gradient(left, @start-color @start-percent, @end-color @end-percent); // Opera 12
-    background-image: linear-gradient(to right, @start-color @start-percent, @end-color @end-percent); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
-    background-repeat: repeat-x;
-    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",argb(@start-color),argb(@end-color))); // IE9 and down
-  }
-
-  // Vertical gradient, from top to bottom
-  //
-  // Creates two color stops, start and end, by specifying a color and position for each color stop.
-  // Color stops are not available in IE9 and below.
-  .vertical(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) {
-    background-image: -webkit-linear-gradient(top, @start-color @start-percent, @end-color @end-percent);  // Safari 5.1-6, Chrome 10+
-    background-image: -o-linear-gradient(top, @start-color @start-percent, @end-color @end-percent);  // Opera 12
-    background-image: linear-gradient(to bottom, @start-color @start-percent, @end-color @end-percent); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
-    background-repeat: repeat-x;
-    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@start-color),argb(@end-color))); // IE9 and down
-  }
-
-  .directional(@start-color: #555; @end-color: #333; @deg: 45deg) {
-    background-repeat: repeat-x;
-    background-image: -webkit-linear-gradient(@deg, @start-color, @end-color); // Safari 5.1-6, Chrome 10+
-    background-image: -o-linear-gradient(@deg, @start-color, @end-color); // Opera 12
-    background-image: linear-gradient(@deg, @start-color, @end-color); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
-  }
-  .horizontal-three-colors(@start-color: #00b3ee; @mid-color: #7a43b6; @color-stop: 50%; @end-color: #c3325f) {
-    background-image: -webkit-linear-gradient(left, @start-color, @mid-color @color-stop, @end-color);
-    background-image: -o-linear-gradient(left, @start-color, @mid-color @color-stop, @end-color);
-    background-image: linear-gradient(to right, @start-color, @mid-color @color-stop, @end-color);
-    background-repeat: no-repeat;
-    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",argb(@start-color),argb(@end-color))); // IE9 and down, gets no color-stop at all for proper fallback
-  }
-  .vertical-three-colors(@start-color: #00b3ee; @mid-color: #7a43b6; @color-stop: 50%; @end-color: #c3325f) {
-    background-image: -webkit-linear-gradient(@start-color, @mid-color @color-stop, @end-color);
-    background-image: -o-linear-gradient(@start-color, @mid-color @color-stop, @end-color);
-    background-image: linear-gradient(@start-color, @mid-color @color-stop, @end-color);
-    background-repeat: no-repeat;
-    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@start-color),argb(@end-color))); // IE9 and down, gets no color-stop at all for proper fallback
-  }
-  .radial(@inner-color: #555; @outer-color: #333) {
-    background-image: -webkit-radial-gradient(circle, @inner-color, @outer-color);
-    background-image: radial-gradient(circle, @inner-color, @outer-color);
-    background-repeat: no-repeat;
-  }
-  .striped(@color: rgba(255,255,255,.15); @angle: 45deg) {
-    background-image: -webkit-linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);
-    background-image: -o-linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);
-    background-image: linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/grid-framework.less b/3rdparty/fmt/doc/bootstrap/mixins/grid-framework.less
deleted file mode 100644
index f3b3929d..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/grid-framework.less
+++ /dev/null
@@ -1,91 +0,0 @@
-// Framework grid generation
-//
-// Used only by Bootstrap to generate the correct number of grid classes given
-// any value of `@grid-columns`.
-
-.make-grid-columns() {
-  // Common styles for all sizes of grid columns, widths 1-12
-  .col(@index) { // initial
-    @item: ~".col-xs-@{index}, .col-sm-@{index}, .col-md-@{index}, .col-lg-@{index}";
-    .col((@index + 1), @item);
-  }
-  .col(@index, @list) when (@index =< @grid-columns) { // general; "=<" isn't a typo
-    @item: ~".col-xs-@{index}, .col-sm-@{index}, .col-md-@{index}, .col-lg-@{index}";
-    .col((@index + 1), ~"@{list}, @{item}");
-  }
-  .col(@index, @list) when (@index > @grid-columns) { // terminal
-    @{list} {
-      position: relative;
-      // Prevent columns from collapsing when empty
-      min-height: 1px;
-      // Inner gutter via padding
-      padding-left:  (@grid-gutter-width / 2);
-      padding-right: (@grid-gutter-width / 2);
-    }
-  }
-  .col(1); // kickstart it
-}
-
-.float-grid-columns(@class) {
-  .col(@index) { // initial
-    @item: ~".col-@{class}-@{index}";
-    .col((@index + 1), @item);
-  }
-  .col(@index, @list) when (@index =< @grid-columns) { // general
-    @item: ~".col-@{class}-@{index}";
-    .col((@index + 1), ~"@{list}, @{item}");
-  }
-  .col(@index, @list) when (@index > @grid-columns) { // terminal
-    @{list} {
-      float: left;
-    }
-  }
-  .col(1); // kickstart it
-}
-
-.calc-grid-column(@index, @class, @type) when (@type = width) and (@index > 0) {
-  .col-@{class}-@{index} {
-    width: percentage((@index / @grid-columns));
-  }
-}
-.calc-grid-column(@index, @class, @type) when (@type = push) and (@index > 0) {
-  .col-@{class}-push-@{index} {
-    left: percentage((@index / @grid-columns));
-  }
-}
-.calc-grid-column(@index, @class, @type) when (@type = push) and (@index = 0) {
-  .col-@{class}-push-0 {
-    left: auto;
-  }
-}
-.calc-grid-column(@index, @class, @type) when (@type = pull) and (@index > 0) {
-  .col-@{class}-pull-@{index} {
-    right: percentage((@index / @grid-columns));
-  }
-}
-.calc-grid-column(@index, @class, @type) when (@type = pull) and (@index = 0) {
-  .col-@{class}-pull-0 {
-    right: auto;
-  }
-}
-.calc-grid-column(@index, @class, @type) when (@type = offset) {
-  .col-@{class}-offset-@{index} {
-    margin-left: percentage((@index / @grid-columns));
-  }
-}
-
-// Basic looping in LESS
-.loop-grid-columns(@index, @class, @type) when (@index >= 0) {
-  .calc-grid-column(@index, @class, @type);
-  // next iteration
-  .loop-grid-columns((@index - 1), @class, @type);
-}
-
-// Create grid for specific class
-.make-grid(@class) {
-  .float-grid-columns(@class);
-  .loop-grid-columns(@grid-columns, @class, width);
-  .loop-grid-columns(@grid-columns, @class, pull);
-  .loop-grid-columns(@grid-columns, @class, push);
-  .loop-grid-columns(@grid-columns, @class, offset);
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/grid.less b/3rdparty/fmt/doc/bootstrap/mixins/grid.less
deleted file mode 100644
index cae5eaff..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/grid.less
+++ /dev/null
@@ -1,122 +0,0 @@
-// Grid system
-//
-// Generate semantic grid columns with these mixins.
-
-// Centered container element
-.container-fixed(@gutter: @grid-gutter-width) {
-  margin-right: auto;
-  margin-left: auto;
-  padding-left:  (@gutter / 2);
-  padding-right: (@gutter / 2);
-  &:extend(.clearfix all);
-}
-
-// Creates a wrapper for a series of columns
-.make-row(@gutter: @grid-gutter-width) {
-  margin-left:  (@gutter / -2);
-  margin-right: (@gutter / -2);
-  &:extend(.clearfix all);
-}
-
-// Generate the extra small columns
-.make-xs-column(@columns; @gutter: @grid-gutter-width) {
-  position: relative;
-  float: left;
-  width: percentage((@columns / @grid-columns));
-  min-height: 1px;
-  padding-left:  (@gutter / 2);
-  padding-right: (@gutter / 2);
-}
-.make-xs-column-offset(@columns) {
-  margin-left: percentage((@columns / @grid-columns));
-}
-.make-xs-column-push(@columns) {
-  left: percentage((@columns / @grid-columns));
-}
-.make-xs-column-pull(@columns) {
-  right: percentage((@columns / @grid-columns));
-}
-
-// Generate the small columns
-.make-sm-column(@columns; @gutter: @grid-gutter-width) {
-  position: relative;
-  min-height: 1px;
-  padding-left:  (@gutter / 2);
-  padding-right: (@gutter / 2);
-
-  @media (min-width: @screen-sm-min) {
-    float: left;
-    width: percentage((@columns / @grid-columns));
-  }
-}
-.make-sm-column-offset(@columns) {
-  @media (min-width: @screen-sm-min) {
-    margin-left: percentage((@columns / @grid-columns));
-  }
-}
-.make-sm-column-push(@columns) {
-  @media (min-width: @screen-sm-min) {
-    left: percentage((@columns / @grid-columns));
-  }
-}
-.make-sm-column-pull(@columns) {
-  @media (min-width: @screen-sm-min) {
-    right: percentage((@columns / @grid-columns));
-  }
-}
-
-// Generate the medium columns
-.make-md-column(@columns; @gutter: @grid-gutter-width) {
-  position: relative;
-  min-height: 1px;
-  padding-left:  (@gutter / 2);
-  padding-right: (@gutter / 2);
-
-  @media (min-width: @screen-md-min) {
-    float: left;
-    width: percentage((@columns / @grid-columns));
-  }
-}
-.make-md-column-offset(@columns) {
-  @media (min-width: @screen-md-min) {
-    margin-left: percentage((@columns / @grid-columns));
-  }
-}
-.make-md-column-push(@columns) {
-  @media (min-width: @screen-md-min) {
-    left: percentage((@columns / @grid-columns));
-  }
-}
-.make-md-column-pull(@columns) {
-  @media (min-width: @screen-md-min) {
-    right: percentage((@columns / @grid-columns));
-  }
-}
-
-// Generate the large columns
-.make-lg-column(@columns; @gutter: @grid-gutter-width) {
-  position: relative;
-  min-height: 1px;
-  padding-left:  (@gutter / 2);
-  padding-right: (@gutter / 2);
-
-  @media (min-width: @screen-lg-min) {
-    float: left;
-    width: percentage((@columns / @grid-columns));
-  }
-}
-.make-lg-column-offset(@columns) {
-  @media (min-width: @screen-lg-min) {
-    margin-left: percentage((@columns / @grid-columns));
-  }
-}
-.make-lg-column-push(@columns) {
-  @media (min-width: @screen-lg-min) {
-    left: percentage((@columns / @grid-columns));
-  }
-}
-.make-lg-column-pull(@columns) {
-  @media (min-width: @screen-lg-min) {
-    right: percentage((@columns / @grid-columns));
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/hide-text.less b/3rdparty/fmt/doc/bootstrap/mixins/hide-text.less
deleted file mode 100644
index c2315e57..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/hide-text.less
+++ /dev/null
@@ -1,21 +0,0 @@
-// CSS image replacement
-//
-// Heads up! v3 launched with with only `.hide-text()`, but per our pattern for
-// mixins being reused as classes with the same name, this doesn't hold up. As
-// of v3.0.1 we have added `.text-hide()` and deprecated `.hide-text()`.
-//
-// Source: https://github.com/h5bp/html5-boilerplate/commit/aa0396eae757
-
-// Deprecated as of v3.0.1 (will be removed in v4)
-.hide-text() {
-  font: ~"0/0" a;
-  color: transparent;
-  text-shadow: none;
-  background-color: transparent;
-  border: 0;
-}
-
-// New mixin to use as of v3.0.1
-.text-hide() {
-  .hide-text();
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/image.less b/3rdparty/fmt/doc/bootstrap/mixins/image.less
deleted file mode 100644
index f233cb3e..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/image.less
+++ /dev/null
@@ -1,33 +0,0 @@
-// Image Mixins
-// - Responsive image
-// - Retina image
-
-
-// Responsive image
-//
-// Keep images from scaling beyond the width of their parents.
-.img-responsive(@display: block) {
-  display: @display;
-  max-width: 100%; // Part 1: Set a maximum relative to the parent
-  height: auto; // Part 2: Scale the height according to the width, otherwise you get stretching
-}
-
-
-// Retina image
-//
-// Short retina mixin for setting background-image and -size. Note that the
-// spelling of `min--moz-device-pixel-ratio` is intentional.
-.img-retina(@file-1x; @file-2x; @width-1x; @height-1x) {
-  background-image: url("@{file-1x}");
-
-  @media
-  only screen and (-webkit-min-device-pixel-ratio: 2),
-  only screen and (   min--moz-device-pixel-ratio: 2),
-  only screen and (     -o-min-device-pixel-ratio: 2/1),
-  only screen and (        min-device-pixel-ratio: 2),
-  only screen and (                min-resolution: 192dpi),
-  only screen and (                min-resolution: 2dppx) {
-    background-image: url("@{file-2x}");
-    background-size: @width-1x @height-1x;
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/labels.less b/3rdparty/fmt/doc/bootstrap/mixins/labels.less
deleted file mode 100644
index 9f7a67ee..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/labels.less
+++ /dev/null
@@ -1,12 +0,0 @@
-// Labels
-
-.label-variant(@color) {
-  background-color: @color;
-
-  &[href] {
-    &:hover,
-    &:focus {
-      background-color: darken(@color, 10%);
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/list-group.less b/3rdparty/fmt/doc/bootstrap/mixins/list-group.less
deleted file mode 100644
index 8b5b065c..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/list-group.less
+++ /dev/null
@@ -1,29 +0,0 @@
-// List Groups
-
-.list-group-item-variant(@state; @background; @color) {
-  .list-group-item-@{state} {
-    color: @color;
-    background-color: @background;
-
-    a& {
-      color: @color;
-
-      .list-group-item-heading {
-        color: inherit;
-      }
-
-      &:hover,
-      &:focus {
-        color: @color;
-        background-color: darken(@background, 5%);
-      }
-      &.active,
-      &.active:hover,
-      &.active:focus {
-        color: #fff;
-        background-color: @color;
-        border-color: @color;
-      }
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/nav-divider.less b/3rdparty/fmt/doc/bootstrap/mixins/nav-divider.less
deleted file mode 100644
index feb1e9ed..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/nav-divider.less
+++ /dev/null
@@ -1,10 +0,0 @@
-// Horizontal dividers
-//
-// Dividers (basically an hr) within dropdowns and nav lists
-
-.nav-divider(@color: #e5e5e5) {
-  height: 1px;
-  margin: ((@line-height-computed / 2) - 1) 0;
-  overflow: hidden;
-  background-color: @color;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/nav-vertical-align.less b/3rdparty/fmt/doc/bootstrap/mixins/nav-vertical-align.less
deleted file mode 100644
index d458c786..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/nav-vertical-align.less
+++ /dev/null
@@ -1,9 +0,0 @@
-// Navbar vertical align
-//
-// Vertically center elements in the navbar.
-// Example: an element has a height of 30px, so write out `.navbar-vertical-align(30px);` to calculate the appropriate top margin.
-
-.navbar-vertical-align(@element-height) {
-  margin-top: ((@navbar-height - @element-height) / 2);
-  margin-bottom: ((@navbar-height - @element-height) / 2);
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/opacity.less b/3rdparty/fmt/doc/bootstrap/mixins/opacity.less
deleted file mode 100644
index 33ed25ce..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/opacity.less
+++ /dev/null
@@ -1,8 +0,0 @@
-// Opacity
-
-.opacity(@opacity) {
-  opacity: @opacity;
-  // IE8 filter
-  @opacity-ie: (@opacity * 100);
-  filter: ~"alpha(opacity=@{opacity-ie})";
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/pagination.less b/3rdparty/fmt/doc/bootstrap/mixins/pagination.less
deleted file mode 100644
index 7deb505d..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/pagination.less
+++ /dev/null
@@ -1,23 +0,0 @@
-// Pagination
-
-.pagination-size(@padding-vertical; @padding-horizontal; @font-size; @border-radius) {
-  > li {
-    > a,
-    > span {
-      padding: @padding-vertical @padding-horizontal;
-      font-size: @font-size;
-    }
-    &:first-child {
-      > a,
-      > span {
-        .border-left-radius(@border-radius);
-      }
-    }
-    &:last-child {
-      > a,
-      > span {
-        .border-right-radius(@border-radius);
-      }
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/panels.less b/3rdparty/fmt/doc/bootstrap/mixins/panels.less
deleted file mode 100644
index 49ee10d4..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/panels.less
+++ /dev/null
@@ -1,24 +0,0 @@
-// Panels
-
-.panel-variant(@border; @heading-text-color; @heading-bg-color; @heading-border) {
-  border-color: @border;
-
-  & > .panel-heading {
-    color: @heading-text-color;
-    background-color: @heading-bg-color;
-    border-color: @heading-border;
-
-    + .panel-collapse > .panel-body {
-      border-top-color: @border;
-    }
-    .badge {
-      color: @heading-bg-color;
-      background-color: @heading-text-color;
-    }
-  }
-  & > .panel-footer {
-    + .panel-collapse > .panel-body {
-      border-bottom-color: @border;
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/progress-bar.less b/3rdparty/fmt/doc/bootstrap/mixins/progress-bar.less
deleted file mode 100644
index f07996a3..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/progress-bar.less
+++ /dev/null
@@ -1,10 +0,0 @@
-// Progress bars
-
-.progress-bar-variant(@color) {
-  background-color: @color;
-
-  // Deprecated parent class requirement as of v3.2.0
-  .progress-striped & {
-    #gradient > .striped();
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/reset-filter.less b/3rdparty/fmt/doc/bootstrap/mixins/reset-filter.less
deleted file mode 100644
index 68cdb5e1..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/reset-filter.less
+++ /dev/null
@@ -1,8 +0,0 @@
-// Reset filters for IE
-//
-// When you need to remove a gradient background, do not forget to use this to reset
-// the IE filter for IE9 and below.
-
-.reset-filter() {
-  filter: e(%("progid:DXImageTransform.Microsoft.gradient(enabled = false)"));
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/resize.less b/3rdparty/fmt/doc/bootstrap/mixins/resize.less
deleted file mode 100644
index 3acd3afd..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/resize.less
+++ /dev/null
@@ -1,6 +0,0 @@
-// Resize anything
-
-.resizable(@direction) {
-  resize: @direction; // Options: horizontal, vertical, both
-  overflow: auto; // Per CSS3 UI, `resize` only applies when `overflow` isn't `visible`
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/responsive-visibility.less b/3rdparty/fmt/doc/bootstrap/mixins/responsive-visibility.less
deleted file mode 100644
index f7951c3d..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/responsive-visibility.less
+++ /dev/null
@@ -1,15 +0,0 @@
-// Responsive utilities
-
-//
-// More easily include all the states for responsive-utilities.less.
-.responsive-visibility() {
-  display: block !important;
-  table&  { display: table; }
-  tr&     { display: table-row !important; }
-  th&,
-  td&     { display: table-cell !important; }
-}
-
-.responsive-invisibility() {
-  display: none !important;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/size.less b/3rdparty/fmt/doc/bootstrap/mixins/size.less
deleted file mode 100644
index a8be6508..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/size.less
+++ /dev/null
@@ -1,10 +0,0 @@
-// Sizing shortcuts
-
-.size(@width; @height) {
-  width: @width;
-  height: @height;
-}
-
-.square(@size) {
-  .size(@size; @size);
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/tab-focus.less b/3rdparty/fmt/doc/bootstrap/mixins/tab-focus.less
deleted file mode 100644
index 1f1f05ab..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/tab-focus.less
+++ /dev/null
@@ -1,9 +0,0 @@
-// WebKit-style focus
-
-.tab-focus() {
-  // Default
-  outline: thin dotted;
-  // WebKit
-  outline: 5px auto -webkit-focus-ring-color;
-  outline-offset: -2px;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/table-row.less b/3rdparty/fmt/doc/bootstrap/mixins/table-row.less
deleted file mode 100644
index 0f287f1a..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/table-row.less
+++ /dev/null
@@ -1,28 +0,0 @@
-// Tables
-
-.table-row-variant(@state; @background) {
-  // Exact selectors below required to override `.table-striped` and prevent
-  // inheritance to nested tables.
-  .table > thead > tr,
-  .table > tbody > tr,
-  .table > tfoot > tr {
-    > td.@{state},
-    > th.@{state},
-    &.@{state} > td,
-    &.@{state} > th {
-      background-color: @background;
-    }
-  }
-
-  // Hover states for `.table-hover`
-  // Note: this is not available for cells or rows within `thead` or `tfoot`.
-  .table-hover > tbody > tr {
-    > td.@{state}:hover,
-    > th.@{state}:hover,
-    &.@{state}:hover > td,
-    &:hover > .@{state},
-    &.@{state}:hover > th {
-      background-color: darken(@background, 5%);
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/text-emphasis.less b/3rdparty/fmt/doc/bootstrap/mixins/text-emphasis.less
deleted file mode 100644
index 0868ef9f..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/text-emphasis.less
+++ /dev/null
@@ -1,8 +0,0 @@
-// Typography
-
-.text-emphasis-variant(@color) {
-  color: @color;
-  a&:hover {
-    color: darken(@color, 10%);
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/text-overflow.less b/3rdparty/fmt/doc/bootstrap/mixins/text-overflow.less
deleted file mode 100644
index c11ad2fb..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/text-overflow.less
+++ /dev/null
@@ -1,8 +0,0 @@
-// Text overflow
-// Requires inline-block or block for proper styling
-
-.text-overflow() {
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/mixins/vendor-prefixes.less b/3rdparty/fmt/doc/bootstrap/mixins/vendor-prefixes.less
deleted file mode 100644
index afd3331c..00000000
--- a/3rdparty/fmt/doc/bootstrap/mixins/vendor-prefixes.less
+++ /dev/null
@@ -1,227 +0,0 @@
-// Vendor Prefixes
-//
-// All vendor mixins are deprecated as of v3.2.0 due to the introduction of
-// Autoprefixer in our Gruntfile. They will be removed in v4.
-
-// - Animations
-// - Backface visibility
-// - Box shadow
-// - Box sizing
-// - Content columns
-// - Hyphens
-// - Placeholder text
-// - Transformations
-// - Transitions
-// - User Select
-
-
-// Animations
-.animation(@animation) {
-  -webkit-animation: @animation;
-       -o-animation: @animation;
-          animation: @animation;
-}
-.animation-name(@name) {
-  -webkit-animation-name: @name;
-          animation-name: @name;
-}
-.animation-duration(@duration) {
-  -webkit-animation-duration: @duration;
-          animation-duration: @duration;
-}
-.animation-timing-function(@timing-function) {
-  -webkit-animation-timing-function: @timing-function;
-          animation-timing-function: @timing-function;
-}
-.animation-delay(@delay) {
-  -webkit-animation-delay: @delay;
-          animation-delay: @delay;
-}
-.animation-iteration-count(@iteration-count) {
-  -webkit-animation-iteration-count: @iteration-count;
-          animation-iteration-count: @iteration-count;
-}
-.animation-direction(@direction) {
-  -webkit-animation-direction: @direction;
-          animation-direction: @direction;
-}
-.animation-fill-mode(@fill-mode) {
-  -webkit-animation-fill-mode: @fill-mode;
-          animation-fill-mode: @fill-mode;
-}
-
-// Backface visibility
-// Prevent browsers from flickering when using CSS 3D transforms.
-// Default value is `visible`, but can be changed to `hidden`
-
-.backface-visibility(@visibility){
-  -webkit-backface-visibility: @visibility;
-     -moz-backface-visibility: @visibility;
-          backface-visibility: @visibility;
-}
-
-// Drop shadows
-//
-// Note: Deprecated `.box-shadow()` as of v3.1.0 since all of Bootstrap's
-// supported browsers that have box shadow capabilities now support it.
-
-.box-shadow(@shadow) {
-  -webkit-box-shadow: @shadow; // iOS <4.3 & Android <4.1
-          box-shadow: @shadow;
-}
-
-// Box sizing
-.box-sizing(@boxmodel) {
-  -webkit-box-sizing: @boxmodel;
-     -moz-box-sizing: @boxmodel;
-          box-sizing: @boxmodel;
-}
-
-// CSS3 Content Columns
-.content-columns(@column-count; @column-gap: @grid-gutter-width) {
-  -webkit-column-count: @column-count;
-     -moz-column-count: @column-count;
-          column-count: @column-count;
-  -webkit-column-gap: @column-gap;
-     -moz-column-gap: @column-gap;
-          column-gap: @column-gap;
-}
-
-// Optional hyphenation
-.hyphens(@mode: auto) {
-  word-wrap: break-word;
-  -webkit-hyphens: @mode;
-     -moz-hyphens: @mode;
-      -ms-hyphens: @mode; // IE10+
-       -o-hyphens: @mode;
-          hyphens: @mode;
-}
-
-// Placeholder text
-.placeholder(@color: @input-color-placeholder) {
-  // Firefox
-  &::-moz-placeholder {
-    color: @color;
-    opacity: 1; // Override Firefox's unusual default opacity; see https://github.com/twbs/bootstrap/pull/11526
-  }
-  &:-ms-input-placeholder { color: @color; } // Internet Explorer 10+
-  &::-webkit-input-placeholder  { color: @color; } // Safari and Chrome
-}
-
-// Transformations
-.scale(@ratio) {
-  -webkit-transform: scale(@ratio);
-      -ms-transform: scale(@ratio); // IE9 only
-       -o-transform: scale(@ratio);
-          transform: scale(@ratio);
-}
-.scale(@ratioX; @ratioY) {
-  -webkit-transform: scale(@ratioX, @ratioY);
-      -ms-transform: scale(@ratioX, @ratioY); // IE9 only
-       -o-transform: scale(@ratioX, @ratioY);
-          transform: scale(@ratioX, @ratioY);
-}
-.scaleX(@ratio) {
-  -webkit-transform: scaleX(@ratio);
-      -ms-transform: scaleX(@ratio); // IE9 only
-       -o-transform: scaleX(@ratio);
-          transform: scaleX(@ratio);
-}
-.scaleY(@ratio) {
-  -webkit-transform: scaleY(@ratio);
-      -ms-transform: scaleY(@ratio); // IE9 only
-       -o-transform: scaleY(@ratio);
-          transform: scaleY(@ratio);
-}
-.skew(@x; @y) {
-  -webkit-transform: skewX(@x) skewY(@y);
-      -ms-transform: skewX(@x) skewY(@y); // See https://github.com/twbs/bootstrap/issues/4885; IE9+
-       -o-transform: skewX(@x) skewY(@y);
-          transform: skewX(@x) skewY(@y);
-}
-.translate(@x; @y) {
-  -webkit-transform: translate(@x, @y);
-      -ms-transform: translate(@x, @y); // IE9 only
-       -o-transform: translate(@x, @y);
-          transform: translate(@x, @y);
-}
-.translate3d(@x; @y; @z) {
-  -webkit-transform: translate3d(@x, @y, @z);
-          transform: translate3d(@x, @y, @z);
-}
-.rotate(@degrees) {
-  -webkit-transform: rotate(@degrees);
-      -ms-transform: rotate(@degrees); // IE9 only
-       -o-transform: rotate(@degrees);
-          transform: rotate(@degrees);
-}
-.rotateX(@degrees) {
-  -webkit-transform: rotateX(@degrees);
-      -ms-transform: rotateX(@degrees); // IE9 only
-       -o-transform: rotateX(@degrees);
-          transform: rotateX(@degrees);
-}
-.rotateY(@degrees) {
-  -webkit-transform: rotateY(@degrees);
-      -ms-transform: rotateY(@degrees); // IE9 only
-       -o-transform: rotateY(@degrees);
-          transform: rotateY(@degrees);
-}
-.perspective(@perspective) {
-  -webkit-perspective: @perspective;
-     -moz-perspective: @perspective;
-          perspective: @perspective;
-}
-.perspective-origin(@perspective) {
-  -webkit-perspective-origin: @perspective;
-     -moz-perspective-origin: @perspective;
-          perspective-origin: @perspective;
-}
-.transform-origin(@origin) {
-  -webkit-transform-origin: @origin;
-     -moz-transform-origin: @origin;
-      -ms-transform-origin: @origin; // IE9 only
-          transform-origin: @origin;
-}
-
-
-// Transitions
-
-.transition(@transition) {
-  -webkit-transition: @transition;
-       -o-transition: @transition;
-          transition: @transition;
-}
-.transition-property(@transition-property) {
-  -webkit-transition-property: @transition-property;
-          transition-property: @transition-property;
-}
-.transition-delay(@transition-delay) {
-  -webkit-transition-delay: @transition-delay;
-          transition-delay: @transition-delay;
-}
-.transition-duration(@transition-duration) {
-  -webkit-transition-duration: @transition-duration;
-          transition-duration: @transition-duration;
-}
-.transition-timing-function(@timing-function) {
-  -webkit-transition-timing-function: @timing-function;
-          transition-timing-function: @timing-function;
-}
-.transition-transform(@transition) {
-  -webkit-transition: -webkit-transform @transition;
-     -moz-transition: -moz-transform @transition;
-       -o-transition: -o-transform @transition;
-          transition: transform @transition;
-}
-
-
-// User select
-// For selecting text on the page
-
-.user-select(@select) {
-  -webkit-user-select: @select;
-     -moz-user-select: @select;
-      -ms-user-select: @select; // IE10+
-          user-select: @select;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/modals.less b/3rdparty/fmt/doc/bootstrap/modals.less
deleted file mode 100644
index 1de62205..00000000
--- a/3rdparty/fmt/doc/bootstrap/modals.less
+++ /dev/null
@@ -1,150 +0,0 @@
-//
-// Modals
-// --------------------------------------------------
-
-// .modal-open      - body class for killing the scroll
-// .modal           - container to scroll within
-// .modal-dialog    - positioning shell for the actual modal
-// .modal-content   - actual modal w/ bg and corners and shit
-
-// Kill the scroll on the body
-.modal-open {
-  overflow: hidden;
-}
-
-// Container that the modal scrolls within
-.modal {
-  display: none;
-  overflow: hidden;
-  position: fixed;
-  top: 0;
-  right: 0;
-  bottom: 0;
-  left: 0;
-  z-index: @zindex-modal;
-  -webkit-overflow-scrolling: touch;
-
-  // Prevent Chrome on Windows from adding a focus outline. For details, see
-  // https://github.com/twbs/bootstrap/pull/10951.
-  outline: 0;
-
-  // When fading in the modal, animate it to slide down
-  &.fade .modal-dialog {
-    .translate(0, -25%);
-    .transition-transform(~"0.3s ease-out");
-  }
-  &.in .modal-dialog { .translate(0, 0) }
-}
-.modal-open .modal {
-  overflow-x: hidden;
-  overflow-y: auto;
-}
-
-// Shell div to position the modal with bottom padding
-.modal-dialog {
-  position: relative;
-  width: auto;
-  margin: 10px;
-}
-
-// Actual modal
-.modal-content {
-  position: relative;
-  background-color: @modal-content-bg;
-  border: 1px solid @modal-content-fallback-border-color; //old browsers fallback (ie8 etc)
-  border: 1px solid @modal-content-border-color;
-  border-radius: @border-radius-large;
-  .box-shadow(0 3px 9px rgba(0,0,0,.5));
-  background-clip: padding-box;
-  // Remove focus outline from opened modal
-  outline: 0;
-}
-
-// Modal background
-.modal-backdrop {
-  position: fixed;
-  top: 0;
-  right: 0;
-  bottom: 0;
-  left: 0;
-  z-index: @zindex-modal-background;
-  background-color: @modal-backdrop-bg;
-  // Fade for backdrop
-  &.fade { .opacity(0); }
-  &.in { .opacity(@modal-backdrop-opacity); }
-}
-
-// Modal header
-// Top section of the modal w/ title and dismiss
-.modal-header {
-  padding: @modal-title-padding;
-  border-bottom: 1px solid @modal-header-border-color;
-  min-height: (@modal-title-padding + @modal-title-line-height);
-}
-// Close icon
-.modal-header .close {
-  margin-top: -2px;
-}
-
-// Title text within header
-.modal-title {
-  margin: 0;
-  line-height: @modal-title-line-height;
-}
-
-// Modal body
-// Where all modal content resides (sibling of .modal-header and .modal-footer)
-.modal-body {
-  position: relative;
-  padding: @modal-inner-padding;
-}
-
-// Footer (for actions)
-.modal-footer {
-  padding: @modal-inner-padding;
-  text-align: right; // right align buttons
-  border-top: 1px solid @modal-footer-border-color;
-  &:extend(.clearfix all); // clear it in case folks use .pull-* classes on buttons
-
-  // Properly space out buttons
-  .btn + .btn {
-    margin-left: 5px;
-    margin-bottom: 0; // account for input[type="submit"] which gets the bottom margin like all other inputs
-  }
-  // but override that for button groups
-  .btn-group .btn + .btn {
-    margin-left: -1px;
-  }
-  // and override it for block buttons as well
-  .btn-block + .btn-block {
-    margin-left: 0;
-  }
-}
-
-// Measure scrollbar width for padding body during modal show/hide
-.modal-scrollbar-measure {
-  position: absolute;
-  top: -9999px;
-  width: 50px;
-  height: 50px;
-  overflow: scroll;
-}
-
-// Scale up the modal
-@media (min-width: @screen-sm-min) {
-  // Automatically set modal's width for larger viewports
-  .modal-dialog {
-    width: @modal-md;
-    margin: 30px auto;
-  }
-  .modal-content {
-    .box-shadow(0 5px 15px rgba(0,0,0,.5));
-  }
-
-  // Modal sizes
-  .modal-sm { width: @modal-sm; }
-}
-
-@media (min-width: @screen-md-min) {
-  .modal-lg { width: @modal-lg; }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/navbar.less b/3rdparty/fmt/doc/bootstrap/navbar.less
deleted file mode 100644
index 03f4e2ac..00000000
--- a/3rdparty/fmt/doc/bootstrap/navbar.less
+++ /dev/null
@@ -1,660 +0,0 @@
-//
-// Navbars
-// --------------------------------------------------
-
-
-// Wrapper and base class
-//
-// Provide a static navbar from which we expand to create full-width, fixed, and
-// other navbar variations.
-
-.navbar {
-  position: relative;
-  min-height: @navbar-height; // Ensure a navbar always shows (e.g., without a .navbar-brand in collapsed mode)
-  margin-bottom: @navbar-margin-bottom;
-  border: 1px solid transparent;
-
-  // Prevent floats from breaking the navbar
-  &:extend(.clearfix all);
-
-  @media (min-width: @grid-float-breakpoint) {
-    border-radius: @navbar-border-radius;
-  }
-}
-
-
-// Navbar heading
-//
-// Groups `.navbar-brand` and `.navbar-toggle` into a single component for easy
-// styling of responsive aspects.
-
-.navbar-header {
-  &:extend(.clearfix all);
-
-  @media (min-width: @grid-float-breakpoint) {
-    float: left;
-  }
-}
-
-
-// Navbar collapse (body)
-//
-// Group your navbar content into this for easy collapsing and expanding across
-// various device sizes. By default, this content is collapsed when <768px, but
-// will expand past that for a horizontal display.
-//
-// To start (on mobile devices) the navbar links, forms, and buttons are stacked
-// vertically and include a `max-height` to overflow in case you have too much
-// content for the user's viewport.
-
-.navbar-collapse {
-  overflow-x: visible;
-  padding-right: @navbar-padding-horizontal;
-  padding-left:  @navbar-padding-horizontal;
-  border-top: 1px solid transparent;
-  box-shadow: inset 0 1px 0 rgba(255,255,255,.1);
-  &:extend(.clearfix all);
-  -webkit-overflow-scrolling: touch;
-
-  &.in {
-    overflow-y: auto;
-  }
-
-  @media (min-width: @grid-float-breakpoint) {
-    width: auto;
-    border-top: 0;
-    box-shadow: none;
-
-    &.collapse {
-      display: block !important;
-      height: auto !important;
-      padding-bottom: 0; // Override default setting
-      overflow: visible !important;
-    }
-
-    &.in {
-      overflow-y: visible;
-    }
-
-    // Undo the collapse side padding for navbars with containers to ensure
-    // alignment of right-aligned contents.
-    .navbar-fixed-top &,
-    .navbar-static-top &,
-    .navbar-fixed-bottom & {
-      padding-left: 0;
-      padding-right: 0;
-    }
-  }
-}
-
-.navbar-fixed-top,
-.navbar-fixed-bottom {
-  .navbar-collapse {
-    max-height: @navbar-collapse-max-height;
-
-    @media (max-device-width: @screen-xs-min) and (orientation: landscape) {
-      max-height: 200px;
-    }
-  }
-}
-
-
-// Both navbar header and collapse
-//
-// When a container is present, change the behavior of the header and collapse.
-
-.tb-container,
-.container-fluid {
-  > .navbar-header,
-  > .navbar-collapse {
-    margin-right: -@navbar-padding-horizontal;
-    margin-left:  -@navbar-padding-horizontal;
-
-    @media (min-width: @grid-float-breakpoint) {
-      margin-right: 0;
-      margin-left:  0;
-    }
-  }
-}
-
-
-//
-// Navbar alignment options
-//
-// Display the navbar across the entirety of the page or fixed it to the top or
-// bottom of the page.
-
-// Static top (unfixed, but 100% wide) navbar
-.navbar-static-top {
-  z-index: @zindex-navbar;
-  border-width: 0 0 1px;
-
-  @media (min-width: @grid-float-breakpoint) {
-    border-radius: 0;
-  }
-}
-
-// Fix the top/bottom navbars when screen real estate supports it
-.navbar-fixed-top,
-.navbar-fixed-bottom {
-  position: fixed;
-  right: 0;
-  left: 0;
-  z-index: @zindex-navbar-fixed;
-
-  // Undo the rounded corners
-  @media (min-width: @grid-float-breakpoint) {
-    border-radius: 0;
-  }
-}
-.navbar-fixed-top {
-  top: 0;
-  border-width: 0 0 1px;
-}
-.navbar-fixed-bottom {
-  bottom: 0;
-  margin-bottom: 0; // override .navbar defaults
-  border-width: 1px 0 0;
-}
-
-
-// Brand/project name
-
-.navbar-brand {
-  float: left;
-  padding: @navbar-padding-vertical @navbar-padding-horizontal;
-  font-size: @font-size-large;
-  line-height: @line-height-computed;
-  height: @navbar-height;
-
-  &:hover,
-  &:focus {
-    text-decoration: none;
-  }
-
-  > img {
-    display: block;
-  }
-
-  @media (min-width: @grid-float-breakpoint) {
-    .navbar > .tb-container &,
-    .navbar > .container-fluid & {
-      margin-left: -@navbar-padding-horizontal;
-    }
-  }
-}
-
-
-// Navbar toggle
-//
-// Custom button for toggling the `.navbar-collapse`, powered by the collapse
-// JavaScript plugin.
-
-.navbar-toggle {
-  position: relative;
-  float: right;
-  margin-right: @navbar-padding-horizontal;
-  padding: 9px 10px;
-  .navbar-vertical-align(34px);
-  background-color: transparent;
-  background-image: none; // Reset unusual Firefox-on-Android default style; see https://github.com/necolas/normalize.css/issues/214
-  border: 1px solid transparent;
-  border-radius: @border-radius-base;
-
-  // We remove the `outline` here, but later compensate by attaching `:hover`
-  // styles to `:focus`.
-  &:focus {
-    outline: 0;
-  }
-
-  // Bars
-  .icon-bar {
-    display: block;
-    width: 22px;
-    height: 2px;
-    border-radius: 1px;
-  }
-  .icon-bar + .icon-bar {
-    margin-top: 4px;
-  }
-
-  @media (min-width: @grid-float-breakpoint) {
-    display: none;
-  }
-}
-
-
-// Navbar nav links
-//
-// Builds on top of the `.nav` components with its own modifier class to make
-// the nav the full height of the horizontal nav (above 768px).
-
-.navbar-nav {
-  margin: (@navbar-padding-vertical / 2) -@navbar-padding-horizontal;
-
-  > li > a {
-    padding-top:    10px;
-    padding-bottom: 10px;
-    line-height: @line-height-computed;
-  }
-
-  @media (max-width: @grid-float-breakpoint-max) {
-    // Dropdowns get custom display when collapsed
-    .open .dropdown-menu {
-      position: static;
-      float: none;
-      width: auto;
-      margin-top: 0;
-      background-color: transparent;
-      border: 0;
-      box-shadow: none;
-      > li > a,
-      .dropdown-header {
-        padding: 5px 15px 5px 25px;
-      }
-      > li > a {
-        line-height: @line-height-computed;
-        &:hover,
-        &:focus {
-          background-image: none;
-        }
-      }
-    }
-  }
-
-  // Uncollapse the nav
-  @media (min-width: @grid-float-breakpoint) {
-    float: left;
-    margin: 0;
-
-    > li {
-      float: left;
-      > a {
-        padding-top:    @navbar-padding-vertical;
-        padding-bottom: @navbar-padding-vertical;
-      }
-    }
-  }
-}
-
-
-// Navbar form
-//
-// Extension of the `.form-inline` with some extra flavor for optimum display in
-// our navbars.
-
-.navbar-form {
-  margin-left: -@navbar-padding-horizontal;
-  margin-right: -@navbar-padding-horizontal;
-  padding: 10px @navbar-padding-horizontal;
-  border-top: 1px solid transparent;
-  border-bottom: 1px solid transparent;
-  @shadow: inset 0 1px 0 rgba(255,255,255,.1), 0 1px 0 rgba(255,255,255,.1);
-  .box-shadow(@shadow);
-
-  // Mixin behavior for optimum display
-  .form-inline();
-
-  .form-group {
-    @media (max-width: @grid-float-breakpoint-max) {
-      margin-bottom: 5px;
-
-      &:last-child {
-        margin-bottom: 0;
-      }
-    }
-  }
-
-  // Vertically center in expanded, horizontal navbar
-  .navbar-vertical-align(@input-height-base);
-
-  // Undo 100% width for pull classes
-  @media (min-width: @grid-float-breakpoint) {
-    width: auto;
-    border: 0;
-    margin-left: 0;
-    margin-right: 0;
-    padding-top: 0;
-    padding-bottom: 0;
-    .box-shadow(none);
-  }
-}
-
-
-// Dropdown menus
-
-// Menu position and menu carets
-.navbar-nav > li > .dropdown-menu {
-  margin-top: 0;
-  .border-top-radius(0);
-}
-// Menu position and menu caret support for dropups via extra dropup class
-.navbar-fixed-bottom .navbar-nav > li > .dropdown-menu {
-  margin-bottom: 0;
-  .border-top-radius(@navbar-border-radius);
-  .border-bottom-radius(0);
-}
-
-
-// Buttons in navbars
-//
-// Vertically center a button within a navbar (when *not* in a form).
-
-.navbar-btn {
-  .navbar-vertical-align(@input-height-base);
-
-  &.btn-sm {
-    .navbar-vertical-align(@input-height-small);
-  }
-  &.btn-xs {
-    .navbar-vertical-align(22);
-  }
-}
-
-
-// Text in navbars
-//
-// Add a class to make any element properly align itself vertically within the navbars.
-
-.navbar-text {
-  .navbar-vertical-align(@line-height-computed);
-
-  @media (min-width: @grid-float-breakpoint) {
-    float: left;
-    margin-left: @navbar-padding-horizontal;
-    margin-right: @navbar-padding-horizontal;
-  }
-}
-
-
-// Component alignment
-//
-// Repurpose the pull utilities as their own navbar utilities to avoid specificity
-// issues with parents and chaining. Only do this when the navbar is uncollapsed
-// though so that navbar contents properly stack and align in mobile.
-//
-// Declared after the navbar components to ensure more specificity on the margins.
-
-@media (min-width: @grid-float-breakpoint) {
-  .navbar-left  { .pull-left(); }
-  .navbar-right {
-    .pull-right();
-    margin-right: -@navbar-padding-horizontal;
-
-    ~ .navbar-right {
-      margin-right: 0;
-    }
-  }
-}
-
-
-// Alternate navbars
-// --------------------------------------------------
-
-// Default navbar
-.navbar-default {
-  background-color: @navbar-default-bg;
-  border-color: @navbar-default-border;
-
-  .navbar-brand {
-    color: @navbar-default-brand-color;
-    &:hover,
-    &:focus {
-      color: @navbar-default-brand-hover-color;
-      background-color: @navbar-default-brand-hover-bg;
-    }
-  }
-
-  .navbar-text {
-    color: @navbar-default-color;
-  }
-
-  .navbar-nav {
-    > li > a {
-      color: @navbar-default-link-color;
-
-      &:hover,
-      &:focus {
-        color: @navbar-default-link-hover-color;
-        background-color: @navbar-default-link-hover-bg;
-      }
-    }
-    > .active > a {
-      &,
-      &:hover,
-      &:focus {
-        color: @navbar-default-link-active-color;
-        background-color: @navbar-default-link-active-bg;
-      }
-    }
-    > .disabled > a {
-      &,
-      &:hover,
-      &:focus {
-        color: @navbar-default-link-disabled-color;
-        background-color: @navbar-default-link-disabled-bg;
-      }
-    }
-  }
-
-  .navbar-toggle {
-    border-color: @navbar-default-toggle-border-color;
-    &:hover,
-    &:focus {
-      background-color: @navbar-default-toggle-hover-bg;
-    }
-    .icon-bar {
-      background-color: @navbar-default-toggle-icon-bar-bg;
-    }
-  }
-
-  .navbar-collapse,
-  .navbar-form {
-    border-color: @navbar-default-border;
-  }
-
-  // Dropdown menu items
-  .navbar-nav {
-    // Remove background color from open dropdown
-    > .open > a {
-      &,
-      &:hover,
-      &:focus {
-        background-color: @navbar-default-link-active-bg;
-        color: @navbar-default-link-active-color;
-      }
-    }
-
-    @media (max-width: @grid-float-breakpoint-max) {
-      // Dropdowns get custom display when collapsed
-      .open .dropdown-menu {
-        > li > a {
-          color: @navbar-default-link-color;
-          &:hover,
-          &:focus {
-            color: @navbar-default-link-hover-color;
-            background-color: @navbar-default-link-hover-bg;
-          }
-        }
-        > .active > a {
-          &,
-          &:hover,
-          &:focus {
-            color: @navbar-default-link-active-color;
-            background-color: @navbar-default-link-active-bg;
-          }
-        }
-        > .disabled > a {
-          &,
-          &:hover,
-          &:focus {
-            color: @navbar-default-link-disabled-color;
-            background-color: @navbar-default-link-disabled-bg;
-          }
-        }
-      }
-    }
-  }
-
-
-  // Links in navbars
-  //
-  // Add a class to ensure links outside the navbar nav are colored correctly.
-
-  .navbar-link {
-    color: @navbar-default-link-color;
-    &:hover {
-      color: @navbar-default-link-hover-color;
-    }
-  }
-
-  .btn-link {
-    color: @navbar-default-link-color;
-    &:hover,
-    &:focus {
-      color: @navbar-default-link-hover-color;
-    }
-    &[disabled],
-    fieldset[disabled] & {
-      &:hover,
-      &:focus {
-        color: @navbar-default-link-disabled-color;
-      }
-    }
-  }
-}
-
-// Inverse navbar
-
-.navbar-inverse {
-  background-color: @navbar-inverse-bg;
-  border-color: @navbar-inverse-border;
-
-  .navbar-brand {
-    color: @navbar-inverse-brand-color;
-    &:hover,
-    &:focus {
-      color: @navbar-inverse-brand-hover-color;
-      background-color: @navbar-inverse-brand-hover-bg;
-    }
-  }
-
-  .navbar-text {
-    color: @navbar-inverse-color;
-  }
-
-  .navbar-nav {
-    > li > a {
-      color: @navbar-inverse-link-color;
-
-      &:hover,
-      &:focus {
-        color: @navbar-inverse-link-hover-color;
-        background-color: @navbar-inverse-link-hover-bg;
-      }
-    }
-    > .active > a {
-      &,
-      &:hover,
-      &:focus {
-        color: @navbar-inverse-link-active-color;
-        background-color: @navbar-inverse-link-active-bg;
-      }
-    }
-    > .disabled > a {
-      &,
-      &:hover,
-      &:focus {
-        color: @navbar-inverse-link-disabled-color;
-        background-color: @navbar-inverse-link-disabled-bg;
-      }
-    }
-  }
-
-  // Darken the responsive nav toggle
-  .navbar-toggle {
-    border-color: @navbar-inverse-toggle-border-color;
-    &:hover,
-    &:focus {
-      background-color: @navbar-inverse-toggle-hover-bg;
-    }
-    .icon-bar {
-      background-color: @navbar-inverse-toggle-icon-bar-bg;
-    }
-  }
-
-  .navbar-collapse,
-  .navbar-form {
-    border-color: darken(@navbar-inverse-bg, 7%);
-  }
-
-  // Dropdowns
-  .navbar-nav {
-    > .open > a {
-      &,
-      &:hover,
-      &:focus {
-        background-color: @navbar-inverse-link-active-bg;
-        color: @navbar-inverse-link-active-color;
-      }
-    }
-
-    @media (max-width: @grid-float-breakpoint-max) {
-      // Dropdowns get custom display
-      .open .dropdown-menu {
-        > .dropdown-header {
-          border-color: @navbar-inverse-border;
-        }
-        .divider {
-          background-color: @navbar-inverse-border;
-        }
-        > li > a {
-          color: @navbar-inverse-link-color;
-          &:hover,
-          &:focus {
-            color: @navbar-inverse-link-hover-color;
-            background-color: @navbar-inverse-link-hover-bg;
-          }
-        }
-        > .active > a {
-          &,
-          &:hover,
-          &:focus {
-            color: @navbar-inverse-link-active-color;
-            background-color: @navbar-inverse-link-active-bg;
-          }
-        }
-        > .disabled > a {
-          &,
-          &:hover,
-          &:focus {
-            color: @navbar-inverse-link-disabled-color;
-            background-color: @navbar-inverse-link-disabled-bg;
-          }
-        }
-      }
-    }
-  }
-
-  .navbar-link {
-    color: @navbar-inverse-link-color;
-    &:hover {
-      color: @navbar-inverse-link-hover-color;
-    }
-  }
-
-  .btn-link {
-    color: @navbar-inverse-link-color;
-    &:hover,
-    &:focus {
-      color: @navbar-inverse-link-hover-color;
-    }
-    &[disabled],
-    fieldset[disabled] & {
-      &:hover,
-      &:focus {
-        color: @navbar-inverse-link-disabled-color;
-      }
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/navs.less b/3rdparty/fmt/doc/bootstrap/navs.less
deleted file mode 100644
index a3d11b13..00000000
--- a/3rdparty/fmt/doc/bootstrap/navs.less
+++ /dev/null
@@ -1,242 +0,0 @@
-//
-// Navs
-// --------------------------------------------------
-
-
-// Base class
-// --------------------------------------------------
-
-.nav {
-  margin-bottom: 0;
-  padding-left: 0; // Override default ul/ol
-  list-style: none;
-  &:extend(.clearfix all);
-
-  > li {
-    position: relative;
-    display: block;
-
-    > a {
-      position: relative;
-      display: block;
-      padding: @nav-link-padding;
-      &:hover,
-      &:focus {
-        text-decoration: none;
-        background-color: @nav-link-hover-bg;
-      }
-    }
-
-    // Disabled state sets text to gray and nukes hover/tab effects
-    &.disabled > a {
-      color: @nav-disabled-link-color;
-
-      &:hover,
-      &:focus {
-        color: @nav-disabled-link-hover-color;
-        text-decoration: none;
-        background-color: transparent;
-        cursor: @cursor-disabled;
-      }
-    }
-  }
-
-  // Open dropdowns
-  .open > a {
-    &,
-    &:hover,
-    &:focus {
-      background-color: @nav-link-hover-bg;
-      border-color: @link-color;
-    }
-  }
-
-  // Nav dividers (deprecated with v3.0.1)
-  //
-  // This should have been removed in v3 with the dropping of `.nav-list`, but
-  // we missed it. We don't currently support this anywhere, but in the interest
-  // of maintaining backward compatibility in case you use it, it's deprecated.
-  .nav-divider {
-    .nav-divider();
-  }
-
-  // Prevent IE8 from misplacing imgs
-  //
-  // See https://github.com/h5bp/html5-boilerplate/issues/984#issuecomment-3985989
-  > li > a > img {
-    max-width: none;
-  }
-}
-
-
-// Tabs
-// -------------------------
-
-// Give the tabs something to sit on
-.nav-tabs {
-  border-bottom: 1px solid @nav-tabs-border-color;
-  > li {
-    float: left;
-    // Make the list-items overlay the bottom border
-    margin-bottom: -1px;
-
-    // Actual tabs (as links)
-    > a {
-      margin-right: 2px;
-      line-height: @line-height-base;
-      border: 1px solid transparent;
-      border-radius: @border-radius-base @border-radius-base 0 0;
-      &:hover {
-        border-color: @nav-tabs-link-hover-border-color @nav-tabs-link-hover-border-color @nav-tabs-border-color;
-      }
-    }
-
-    // Active state, and its :hover to override normal :hover
-    &.active > a {
-      &,
-      &:hover,
-      &:focus {
-        color: @nav-tabs-active-link-hover-color;
-        background-color: @nav-tabs-active-link-hover-bg;
-        border: 1px solid @nav-tabs-active-link-hover-border-color;
-        border-bottom-color: transparent;
-        cursor: default;
-      }
-    }
-  }
-  // pulling this in mainly for less shorthand
-  &.nav-justified {
-    .nav-justified();
-    .nav-tabs-justified();
-  }
-}
-
-
-// Pills
-// -------------------------
-.nav-pills {
-  > li {
-    float: left;
-
-    // Links rendered as pills
-    > a {
-      border-radius: @nav-pills-border-radius;
-    }
-    + li {
-      margin-left: 2px;
-    }
-
-    // Active state
-    &.active > a {
-      &,
-      &:hover,
-      &:focus {
-        color: @nav-pills-active-link-hover-color;
-        background-color: @nav-pills-active-link-hover-bg;
-      }
-    }
-  }
-}
-
-
-// Stacked pills
-.nav-stacked {
-  > li {
-    float: none;
-    + li {
-      margin-top: 2px;
-      margin-left: 0; // no need for this gap between nav items
-    }
-  }
-}
-
-
-// Nav variations
-// --------------------------------------------------
-
-// Justified nav links
-// -------------------------
-
-.nav-justified {
-  width: 100%;
-
-  > li {
-    float: none;
-    > a {
-      text-align: center;
-      margin-bottom: 5px;
-    }
-  }
-
-  > .dropdown .dropdown-menu {
-    top: auto;
-    left: auto;
-  }
-
-  @media (min-width: @screen-sm-min) {
-    > li {
-      display: table-cell;
-      width: 1%;
-      > a {
-        margin-bottom: 0;
-      }
-    }
-  }
-}
-
-// Move borders to anchors instead of bottom of list
-//
-// Mixin for adding on top the shared `.nav-justified` styles for our tabs
-.nav-tabs-justified {
-  border-bottom: 0;
-
-  > li > a {
-    // Override margin from .nav-tabs
-    margin-right: 0;
-    border-radius: @border-radius-base;
-  }
-
-  > .active > a,
-  > .active > a:hover,
-  > .active > a:focus {
-    border: 1px solid @nav-tabs-justified-link-border-color;
-  }
-
-  @media (min-width: @screen-sm-min) {
-    > li > a {
-      border-bottom: 1px solid @nav-tabs-justified-link-border-color;
-      border-radius: @border-radius-base @border-radius-base 0 0;
-    }
-    > .active > a,
-    > .active > a:hover,
-    > .active > a:focus {
-      border-bottom-color: @nav-tabs-justified-active-link-border-color;
-    }
-  }
-}
-
-
-// Tabbable tabs
-// -------------------------
-
-// Hide tabbable panes to start, show them when `.active`
-.tab-content {
-  > .tab-pane {
-    display: none;
-  }
-  > .active {
-    display: block;
-  }
-}
-
-
-// Dropdowns
-// -------------------------
-
-// Specific dropdowns
-.nav-tabs .dropdown-menu {
-  // make dropdown border overlap tab border
-  margin-top: -1px;
-  // Remove the top rounded corners here since there is a hard edge above the menu
-  .border-top-radius(0);
-}
diff --git a/3rdparty/fmt/doc/bootstrap/normalize.less b/3rdparty/fmt/doc/bootstrap/normalize.less
deleted file mode 100644
index 62a085a4..00000000
--- a/3rdparty/fmt/doc/bootstrap/normalize.less
+++ /dev/null
@@ -1,427 +0,0 @@
-/*! normalize.css v3.0.2 | MIT License | git.io/normalize */
-
-//
-// 1. Set default font family to sans-serif.
-// 2. Prevent iOS text size adjust after orientation change, without disabling
-//    user zoom.
-//
-
-html {
-  font-family: sans-serif; // 1
-  -ms-text-size-adjust: 100%; // 2
-  -webkit-text-size-adjust: 100%; // 2
-}
-
-//
-// Remove default margin.
-//
-
-body {
-  margin: 0;
-}
-
-// HTML5 display definitions
-// ==========================================================================
-
-//
-// Correct `block` display not defined for any HTML5 element in IE 8/9.
-// Correct `block` display not defined for `details` or `summary` in IE 10/11
-// and Firefox.
-// Correct `block` display not defined for `main` in IE 11.
-//
-
-article,
-aside,
-details,
-figcaption,
-figure,
-footer,
-header,
-hgroup,
-main,
-menu,
-nav,
-section,
-summary {
-  display: block;
-}
-
-//
-// 1. Correct `inline-block` display not defined in IE 8/9.
-// 2. Normalize vertical alignment of `progress` in Chrome, Firefox, and Opera.
-//
-
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; // 1
-  vertical-align: baseline; // 2
-}
-
-//
-// Prevent modern browsers from displaying `audio` without controls.
-// Remove excess height in iOS 5 devices.
-//
-
-audio:not([controls]) {
-  display: none;
-  height: 0;
-}
-
-//
-// Address `[hidden]` styling not present in IE 8/9/10.
-// Hide the `template` element in IE 8/9/11, Safari, and Firefox < 22.
-//
-
-[hidden],
-template {
-  display: none;
-}
-
-// Links
-// ==========================================================================
-
-//
-// Remove the gray background color from active links in IE 10.
-//
-
-a {
-  background-color: transparent;
-}
-
-//
-// Improve readability when focused and also mouse hovered in all browsers.
-//
-
-a:active,
-a:hover {
-  outline: 0;
-}
-
-// Text-level semantics
-// ==========================================================================
-
-//
-// Address styling not present in IE 8/9/10/11, Safari, and Chrome.
-//
-
-abbr[title] {
-  border-bottom: 1px dotted;
-}
-
-//
-// Address style set to `bolder` in Firefox 4+, Safari, and Chrome.
-//
-
-b,
-strong {
-  font-weight: bold;
-}
-
-//
-// Address styling not present in Safari and Chrome.
-//
-
-dfn {
-  font-style: italic;
-}
-
-//
-// Address variable `h1` font-size and margin within `section` and `article`
-// contexts in Firefox 4+, Safari, and Chrome.
-//
-
-h1 {
-  font-size: 2em;
-  margin: 0.67em 0;
-}
-
-//
-// Address styling not present in IE 8/9.
-//
-
-mark {
-  background: #ff0;
-  color: #000;
-}
-
-//
-// Address inconsistent and variable font size in all browsers.
-//
-
-small {
-  font-size: 80%;
-}
-
-//
-// Prevent `sub` and `sup` affecting `line-height` in all browsers.
-//
-
-sub,
-sup {
-  font-size: 75%;
-  line-height: 0;
-  position: relative;
-  vertical-align: baseline;
-}
-
-sup {
-  top: -0.5em;
-}
-
-sub {
-  bottom: -0.25em;
-}
-
-// Embedded content
-// ==========================================================================
-
-//
-// Remove border when inside `a` element in IE 8/9/10.
-//
-
-img {
-  border: 0;
-}
-
-//
-// Correct overflow not hidden in IE 9/10/11.
-//
-
-svg:not(:root) {
-  overflow: hidden;
-}
-
-// Grouping content
-// ==========================================================================
-
-//
-// Address margin not present in IE 8/9 and Safari.
-//
-
-figure {
-  margin: 1em 40px;
-}
-
-//
-// Address differences between Firefox and other browsers.
-//
-
-hr {
-  -moz-box-sizing: content-box;
-  box-sizing: content-box;
-  height: 0;
-}
-
-//
-// Contain overflow in all browsers.
-//
-
-pre {
-  overflow: auto;
-}
-
-//
-// Address odd `em`-unit font size rendering in all browsers.
-//
-
-code,
-kbd,
-pre,
-samp {
-  font-family: monospace, monospace;
-  font-size: 1em;
-}
-
-// Forms
-// ==========================================================================
-
-//
-// Known limitation: by default, Chrome and Safari on OS X allow very limited
-// styling of `select`, unless a `border` property is set.
-//
-
-//
-// 1. Correct color not being inherited.
-//    Known issue: affects color of disabled elements.
-// 2. Correct font properties not being inherited.
-// 3. Address margins set differently in Firefox 4+, Safari, and Chrome.
-//
-
-button,
-input,
-optgroup,
-select,
-textarea {
-  color: inherit; // 1
-  font: inherit; // 2
-  margin: 0; // 3
-}
-
-//
-// Address `overflow` set to `hidden` in IE 8/9/10/11.
-//
-
-button {
-  overflow: visible;
-}
-
-//
-// Address inconsistent `text-transform` inheritance for `button` and `select`.
-// All other form control elements do not inherit `text-transform` values.
-// Correct `button` style inheritance in Firefox, IE 8/9/10/11, and Opera.
-// Correct `select` style inheritance in Firefox.
-//
-
-button,
-select {
-  text-transform: none;
-}
-
-//
-// 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
-//    and `video` controls.
-// 2. Correct inability to style clickable `input` types in iOS.
-// 3. Improve usability and consistency of cursor style between image-type
-//    `input` and others.
-//
-
-button,
-html input[type="button"], // 1
-input[type="reset"],
-input[type="submit"] {
-  -webkit-appearance: button; // 2
-  cursor: pointer; // 3
-}
-
-//
-// Re-set default cursor for disabled elements.
-//
-
-button[disabled],
-html input[disabled] {
-  cursor: default;
-}
-
-//
-// Remove inner padding and border in Firefox 4+.
-//
-
-button::-moz-focus-inner,
-input::-moz-focus-inner {
-  border: 0;
-  padding: 0;
-}
-
-//
-// Address Firefox 4+ setting `line-height` on `input` using `!important` in
-// the UA stylesheet.
-//
-
-input {
-  line-height: normal;
-}
-
-//
-// It's recommended that you don't attempt to style these elements.
-// Firefox's implementation doesn't respect box-sizing, padding, or width.
-//
-// 1. Address box sizing set to `content-box` in IE 8/9/10.
-// 2. Remove excess padding in IE 8/9/10.
-//
-
-input[type="checkbox"],
-input[type="radio"] {
-  box-sizing: border-box; // 1
-  padding: 0; // 2
-}
-
-//
-// Fix the cursor style for Chrome's increment/decrement buttons. For certain
-// `font-size` values of the `input`, it causes the cursor style of the
-// decrement button to change from `default` to `text`.
-//
-
-input[type="number"]::-webkit-inner-spin-button,
-input[type="number"]::-webkit-outer-spin-button {
-  height: auto;
-}
-
-//
-// 1. Address `appearance` set to `searchfield` in Safari and Chrome.
-// 2. Address `box-sizing` set to `border-box` in Safari and Chrome
-//    (include `-moz` to future-proof).
-//
-
-input[type="search"] {
-  -webkit-appearance: textfield; // 1
-  -moz-box-sizing: content-box;
-  -webkit-box-sizing: content-box; // 2
-  box-sizing: content-box;
-}
-
-//
-// Remove inner padding and search cancel button in Safari and Chrome on OS X.
-// Safari (but not Chrome) clips the cancel button when the search input has
-// padding (and `textfield` appearance).
-//
-
-input[type="search"]::-webkit-search-cancel-button,
-input[type="search"]::-webkit-search-decoration {
-  -webkit-appearance: none;
-}
-
-//
-// Define consistent border, margin, and padding.
-//
-
-fieldset {
-  border: 1px solid #c0c0c0;
-  margin: 0 2px;
-  padding: 0.35em 0.625em 0.75em;
-}
-
-//
-// 1. Correct `color` not being inherited in IE 8/9/10/11.
-// 2. Remove padding so people aren't caught out if they zero out fieldsets.
-//
-
-legend {
-  border: 0; // 1
-  padding: 0; // 2
-}
-
-//
-// Remove default vertical scrollbar in IE 8/9/10/11.
-//
-
-textarea {
-  overflow: auto;
-}
-
-//
-// Don't inherit the `font-weight` (applied by a rule above).
-// NOTE: the default cannot safely be changed in Chrome and Safari on OS X.
-//
-
-optgroup {
-  font-weight: bold;
-}
-
-// Tables
-// ==========================================================================
-
-//
-// Remove most spacing between table cells.
-//
-
-table {
-  border-collapse: collapse;
-  border-spacing: 0;
-}
-
-td,
-th {
-  padding: 0;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/pager.less b/3rdparty/fmt/doc/bootstrap/pager.less
deleted file mode 100644
index 41abaaad..00000000
--- a/3rdparty/fmt/doc/bootstrap/pager.less
+++ /dev/null
@@ -1,54 +0,0 @@
-//
-// Pager pagination
-// --------------------------------------------------
-
-
-.pager {
-  padding-left: 0;
-  margin: @line-height-computed 0;
-  list-style: none;
-  text-align: center;
-  &:extend(.clearfix all);
-  li {
-    display: inline;
-    > a,
-    > span {
-      display: inline-block;
-      padding: 5px 14px;
-      background-color: @pager-bg;
-      border: 1px solid @pager-border;
-      border-radius: @pager-border-radius;
-    }
-
-    > a:hover,
-    > a:focus {
-      text-decoration: none;
-      background-color: @pager-hover-bg;
-    }
-  }
-
-  .next {
-    > a,
-    > span {
-      float: right;
-    }
-  }
-
-  .previous {
-    > a,
-    > span {
-      float: left;
-    }
-  }
-
-  .disabled {
-    > a,
-    > a:hover,
-    > a:focus,
-    > span {
-      color: @pager-disabled-color;
-      background-color: @pager-bg;
-      cursor: @cursor-disabled;
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/pagination.less b/3rdparty/fmt/doc/bootstrap/pagination.less
deleted file mode 100644
index 38c4c3d3..00000000
--- a/3rdparty/fmt/doc/bootstrap/pagination.less
+++ /dev/null
@@ -1,88 +0,0 @@
-//
-// Pagination (multiple pages)
-// --------------------------------------------------
-.pagination {
-  display: inline-block;
-  padding-left: 0;
-  margin: @line-height-computed 0;
-  border-radius: @border-radius-base;
-
-  > li {
-    display: inline; // Remove list-style and block-level defaults
-    > a,
-    > span {
-      position: relative;
-      float: left; // Collapse white-space
-      padding: @padding-base-vertical @padding-base-horizontal;
-      line-height: @line-height-base;
-      text-decoration: none;
-      color: @pagination-color;
-      background-color: @pagination-bg;
-      border: 1px solid @pagination-border;
-      margin-left: -1px;
-    }
-    &:first-child {
-      > a,
-      > span {
-        margin-left: 0;
-        .border-left-radius(@border-radius-base);
-      }
-    }
-    &:last-child {
-      > a,
-      > span {
-        .border-right-radius(@border-radius-base);
-      }
-    }
-  }
-
-  > li > a,
-  > li > span {
-    &:hover,
-    &:focus {
-      color: @pagination-hover-color;
-      background-color: @pagination-hover-bg;
-      border-color: @pagination-hover-border;
-    }
-  }
-
-  > .active > a,
-  > .active > span {
-    &,
-    &:hover,
-    &:focus {
-      z-index: 2;
-      color: @pagination-active-color;
-      background-color: @pagination-active-bg;
-      border-color: @pagination-active-border;
-      cursor: default;
-    }
-  }
-
-  > .disabled {
-    > span,
-    > span:hover,
-    > span:focus,
-    > a,
-    > a:hover,
-    > a:focus {
-      color: @pagination-disabled-color;
-      background-color: @pagination-disabled-bg;
-      border-color: @pagination-disabled-border;
-      cursor: @cursor-disabled;
-    }
-  }
-}
-
-// Sizing
-// --------------------------------------------------
-
-// Large
-.pagination-lg {
-  .pagination-size(@padding-large-vertical; @padding-large-horizontal; @font-size-large; @border-radius-large);
-}
-
-// Small
-.pagination-sm {
-  .pagination-size(@padding-small-vertical; @padding-small-horizontal; @font-size-small; @border-radius-small);
-}
diff --git a/3rdparty/fmt/doc/bootstrap/panels.less b/3rdparty/fmt/doc/bootstrap/panels.less
deleted file mode 100644
index 04eb2b39..00000000
--- a/3rdparty/fmt/doc/bootstrap/panels.less
+++ /dev/null
@@ -1,265 +0,0 @@
-//
-// Panels
-// --------------------------------------------------
-
-
-// Base class
-.panel {
-  margin-bottom: @line-height-computed;
-  background-color: @panel-bg;
-  border: 1px solid transparent;
-  border-radius: @panel-border-radius;
-  .box-shadow(0 1px 1px rgba(0,0,0,.05));
-}
-
-// Panel contents
-.panel-body {
-  padding: @panel-body-padding;
-  &:extend(.clearfix all);
-}
-
-// Optional heading
-.panel-heading {
-  padding: @panel-heading-padding;
-  border-bottom: 1px solid transparent;
-  .border-top-radius((@panel-border-radius - 1));
-
-  > .dropdown .dropdown-toggle {
-    color: inherit;
-  }
-}
-
-// Within heading, strip any `h*` tag of its default margins for spacing.
-.panel-title {
-  margin-top: 0;
-  margin-bottom: 0;
-  font-size: ceil((@font-size-base * 1.125));
-  color: inherit;
-
-  > a,
-  > small,
-  > .small,
-  > small > a,
-  > .small > a {
-    color: inherit;
-  }
-}
-
-// Optional footer (stays gray in every modifier class)
-.panel-footer {
-  padding: @panel-footer-padding;
-  background-color: @panel-footer-bg;
-  border-top: 1px solid @panel-inner-border;
-  .border-bottom-radius((@panel-border-radius - 1));
-}
-
-
-// List groups in panels
-//
-// By default, space out list group content from panel headings to account for
-// any kind of custom content between the two.
-
-.panel {
-  > .list-group,
-  > .panel-collapse > .list-group {
-    margin-bottom: 0;
-
-    .list-group-item {
-      border-width: 1px 0;
-      border-radius: 0;
-    }
-
-    // Add border top radius for first one
-    &:first-child {
-      .list-group-item:first-child {
-        border-top: 0;
-        .border-top-radius((@panel-border-radius - 1));
-      }
-    }
-    // Add border bottom radius for last one
-    &:last-child {
-      .list-group-item:last-child {
-        border-bottom: 0;
-        .border-bottom-radius((@panel-border-radius - 1));
-      }
-    }
-  }
-}
-// Collapse space between when there's no additional content.
-.panel-heading + .list-group {
-  .list-group-item:first-child {
-    border-top-width: 0;
-  }
-}
-.list-group + .panel-footer {
-  border-top-width: 0;
-}
-
-// Tables in panels
-//
-// Place a non-bordered `.table` within a panel (not within a `.panel-body`) and
-// watch it go full width.
-
-.panel {
-  > .table,
-  > .table-responsive > .table,
-  > .panel-collapse > .table {
-    margin-bottom: 0;
-
-    caption {
-      padding-left: @panel-body-padding;
-      padding-right: @panel-body-padding;
-    }
-  }
-  // Add border top radius for first one
-  > .table:first-child,
-  > .table-responsive:first-child > .table:first-child {
-    .border-top-radius((@panel-border-radius - 1));
-
-    > thead:first-child,
-    > tbody:first-child {
-      > tr:first-child {
-        border-top-left-radius: (@panel-border-radius - 1);
-        border-top-right-radius: (@panel-border-radius - 1);
-
-        td:first-child,
-        th:first-child {
-          border-top-left-radius: (@panel-border-radius - 1);
-        }
-        td:last-child,
-        th:last-child {
-          border-top-right-radius: (@panel-border-radius - 1);
-        }
-      }
-    }
-  }
-  // Add border bottom radius for last one
-  > .table:last-child,
-  > .table-responsive:last-child > .table:last-child {
-    .border-bottom-radius((@panel-border-radius - 1));
-
-    > tbody:last-child,
-    > tfoot:last-child {
-      > tr:last-child {
-        border-bottom-left-radius: (@panel-border-radius - 1);
-        border-bottom-right-radius: (@panel-border-radius - 1);
-
-        td:first-child,
-        th:first-child {
-          border-bottom-left-radius: (@panel-border-radius - 1);
-        }
-        td:last-child,
-        th:last-child {
-          border-bottom-right-radius: (@panel-border-radius - 1);
-        }
-      }
-    }
-  }
-  > .panel-body + .table,
-  > .panel-body + .table-responsive,
-  > .table + .panel-body,
-  > .table-responsive + .panel-body {
-    border-top: 1px solid @table-border-color;
-  }
-  > .table > tbody:first-child > tr:first-child th,
-  > .table > tbody:first-child > tr:first-child td {
-    border-top: 0;
-  }
-  > .table-bordered,
-  > .table-responsive > .table-bordered {
-    border: 0;
-    > thead,
-    > tbody,
-    > tfoot {
-      > tr {
-        > th:first-child,
-        > td:first-child {
-          border-left: 0;
-        }
-        > th:last-child,
-        > td:last-child {
-          border-right: 0;
-        }
-      }
-    }
-    > thead,
-    > tbody {
-      > tr:first-child {
-        > td,
-        > th {
-          border-bottom: 0;
-        }
-      }
-    }
-    > tbody,
-    > tfoot {
-      > tr:last-child {
-        > td,
-        > th {
-          border-bottom: 0;
-        }
-      }
-    }
-  }
-  > .table-responsive {
-    border: 0;
-    margin-bottom: 0;
-  }
-}
-
-
-// Collapsable panels (aka, accordion)
-//
-// Wrap a series of panels in `.panel-group` to turn them into an accordion with
-// the help of our collapse JavaScript plugin.
-
-.panel-group {
-  margin-bottom: @line-height-computed;
-
-  // Tighten up margin so it's only between panels
-  .panel {
-    margin-bottom: 0;
-    border-radius: @panel-border-radius;
-
-    + .panel {
-      margin-top: 5px;
-    }
-  }
-
-  .panel-heading {
-    border-bottom: 0;
-
-    + .panel-collapse > .panel-body,
-    + .panel-collapse > .list-group {
-      border-top: 1px solid @panel-inner-border;
-    }
-  }
-
-  .panel-footer {
-    border-top: 0;
-    + .panel-collapse .panel-body {
-      border-bottom: 1px solid @panel-inner-border;
-    }
-  }
-}
-
-
-// Contextual variations
-.panel-default {
-  .panel-variant(@panel-default-border; @panel-default-text; @panel-default-heading-bg; @panel-default-border);
-}
-.panel-primary {
-  .panel-variant(@panel-primary-border; @panel-primary-text; @panel-primary-heading-bg; @panel-primary-border);
-}
-.panel-success {
-  .panel-variant(@panel-success-border; @panel-success-text; @panel-success-heading-bg; @panel-success-border);
-}
-.panel-info {
-  .panel-variant(@panel-info-border; @panel-info-text; @panel-info-heading-bg; @panel-info-border);
-}
-.panel-warning {
-  .panel-variant(@panel-warning-border; @panel-warning-text; @panel-warning-heading-bg; @panel-warning-border);
-}
-.panel-danger {
-  .panel-variant(@panel-danger-border; @panel-danger-text; @panel-danger-heading-bg; @panel-danger-border);
-}
diff --git a/3rdparty/fmt/doc/bootstrap/popovers.less b/3rdparty/fmt/doc/bootstrap/popovers.less
deleted file mode 100644
index 2748eead..00000000
--- a/3rdparty/fmt/doc/bootstrap/popovers.less
+++ /dev/null
@@ -1,135 +0,0 @@
-//
-// Popovers
-// --------------------------------------------------
-
-
-.popover {
-  position: absolute;
-  top: 0;
-  left: 0;
-  z-index: @zindex-popover;
-  display: none;
-  max-width: @popover-max-width;
-  padding: 1px;
-  // Reset font and text properties given new insertion method
-  font-family: @font-family-base;
-  font-size: @font-size-base;
-  font-weight: normal;
-  line-height: @line-height-base;
-  text-align: left;
-  background-color: @popover-bg;
-  background-clip: padding-box;
-  border: 1px solid @popover-fallback-border-color;
-  border: 1px solid @popover-border-color;
-  border-radius: @border-radius-large;
-  .box-shadow(0 5px 10px rgba(0,0,0,.2));
-
-  // Overrides for proper insertion
-  white-space: normal;
-
-  // Offset the popover to account for the popover arrow
-  &.top     { margin-top: -@popover-arrow-width; }
-  &.right   { margin-left: @popover-arrow-width; }
-  &.bottom  { margin-top: @popover-arrow-width; }
-  &.left    { margin-left: -@popover-arrow-width; }
-}
-
-.popover-title {
-  margin: 0; // reset heading margin
-  padding: 8px 14px;
-  font-size: @font-size-base;
-  background-color: @popover-title-bg;
-  border-bottom: 1px solid darken(@popover-title-bg, 5%);
-  border-radius: (@border-radius-large - 1) (@border-radius-large - 1) 0 0;
-}
-
-.popover-content {
-  padding: 9px 14px;
-}
-
-// Arrows
-//
-// .arrow is outer, .arrow:after is inner
-
-.popover > .arrow {
-  &,
-  &:after {
-    position: absolute;
-    display: block;
-    width: 0;
-    height: 0;
-    border-color: transparent;
-    border-style: solid;
-  }
-}
-.popover > .arrow {
-  border-width: @popover-arrow-outer-width;
-}
-.popover > .arrow:after {
-  border-width: @popover-arrow-width;
-  content: "";
-}
-
-.popover {
-  &.top > .arrow {
-    left: 50%;
-    margin-left: -@popover-arrow-outer-width;
-    border-bottom-width: 0;
-    border-top-color: @popover-arrow-outer-fallback-color; // IE8 fallback
-    border-top-color: @popover-arrow-outer-color;
-    bottom: -@popover-arrow-outer-width;
-    &:after {
-      content: " ";
-      bottom: 1px;
-      margin-left: -@popover-arrow-width;
-      border-bottom-width: 0;
-      border-top-color: @popover-arrow-color;
-    }
-  }
-  &.right > .arrow {
-    top: 50%;
-    left: -@popover-arrow-outer-width;
-    margin-top: -@popover-arrow-outer-width;
-    border-left-width: 0;
-    border-right-color: @popover-arrow-outer-fallback-color; // IE8 fallback
-    border-right-color: @popover-arrow-outer-color;
-    &:after {
-      content: " ";
-      left: 1px;
-      bottom: -@popover-arrow-width;
-      border-left-width: 0;
-      border-right-color: @popover-arrow-color;
-    }
-  }
-  &.bottom > .arrow {
-    left: 50%;
-    margin-left: -@popover-arrow-outer-width;
-    border-top-width: 0;
-    border-bottom-color: @popover-arrow-outer-fallback-color; // IE8 fallback
-    border-bottom-color: @popover-arrow-outer-color;
-    top: -@popover-arrow-outer-width;
-    &:after {
-      content: " ";
-      top: 1px;
-      margin-left: -@popover-arrow-width;
-      border-top-width: 0;
-      border-bottom-color: @popover-arrow-color;
-    }
-  }
-
-  &.left > .arrow {
-    top: 50%;
-    right: -@popover-arrow-outer-width;
-    margin-top: -@popover-arrow-outer-width;
-    border-right-width: 0;
-    border-left-color: @popover-arrow-outer-fallback-color; // IE8 fallback
-    border-left-color: @popover-arrow-outer-color;
-    &:after {
-      content: " ";
-      right: 1px;
-      border-right-width: 0;
-      border-left-color: @popover-arrow-color;
-      bottom: -@popover-arrow-width;
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/print.less b/3rdparty/fmt/doc/bootstrap/print.less
deleted file mode 100644
index 94ca58f1..00000000
--- a/3rdparty/fmt/doc/bootstrap/print.less
+++ /dev/null
@@ -1,107 +0,0 @@
-/*! Source: https://github.com/h5bp/html5-boilerplate/blob/master/src/css/main.css */
-
-// ==========================================================================
-// Print styles.
-// Inlined to avoid the additional HTTP request: h5bp.com/r
-// ==========================================================================
-
-@media print {
-    *,
-    *:before,
-    *:after {
-        background: transparent !important;
-        color: #000 !important; // Black prints faster: h5bp.com/s
-        box-shadow: none !important;
-        text-shadow: none !important;
-    }
-
-    a,
-    a:visited {
-        text-decoration: underline;
-    }
-
-    a[href]:after {
-        content: " (" attr(href) ")";
-    }
-
-    abbr[title]:after {
-        content: " (" attr(title) ")";
-    }
-
-    // Don't show links that are fragment identifiers,
-    // or use the `javascript:` pseudo protocol
-    a[href^="#"]:after,
-    a[href^="javascript:"]:after {
-        content: "";
-    }
-
-    pre,
-    blockquote {
-        border: 1px solid #999;
-        page-break-inside: avoid;
-    }
-
-    thead {
-        display: table-header-group; // h5bp.com/t
-    }
-
-    tr,
-    img {
-        page-break-inside: avoid;
-    }
-
-    img {
-        max-width: 100% !important;
-    }
-
-    p,
-    h2,
-    h3 {
-        orphans: 3;
-        widows: 3;
-    }
-
-    h2,
-    h3 {
-        page-break-after: avoid;
-    }
-
-    // Bootstrap specific changes start
-    //
-    // Chrome (OSX) fix for https://github.com/twbs/bootstrap/issues/11245
-    // Once fixed, we can just straight up remove this.
-    select {
-        background: #fff !important;
-    }
-
-    // Bootstrap components
-    .navbar {
-        display: none;
-    }
-    .btn,
-    .dropup > .btn {
-        > .caret {
-            border-top-color: #000 !important;
-        }
-    }
-    .label {
-        border: 1px solid #000;
-    }
-
-    .table {
-        border-collapse: collapse !important;
-
-        td,
-        th {
-            background-color: #fff !important;
-        }
-    }
-    .table-bordered {
-        th,
-        td {
-            border: 1px solid #ddd !important;
-        }
-    }
-
-    // Bootstrap specific changes end
-}
diff --git a/3rdparty/fmt/doc/bootstrap/progress-bars.less b/3rdparty/fmt/doc/bootstrap/progress-bars.less
deleted file mode 100644
index 8868a1fe..00000000
--- a/3rdparty/fmt/doc/bootstrap/progress-bars.less
+++ /dev/null
@@ -1,87 +0,0 @@
-//
-// Progress bars
-// --------------------------------------------------
-
-
-// Bar animations
-// -------------------------
-
-// WebKit
-@-webkit-keyframes progress-bar-stripes {
-  from  { background-position: 40px 0; }
-  to    { background-position: 0 0; }
-}
-
-// Spec and IE10+
-@keyframes progress-bar-stripes {
-  from  { background-position: 40px 0; }
-  to    { background-position: 0 0; }
-}
-
-
-// Bar itself
-// -------------------------
-
-// Outer container
-.progress {
-  overflow: hidden;
-  height: @line-height-computed;
-  margin-bottom: @line-height-computed;
-  background-color: @progress-bg;
-  border-radius: @progress-border-radius;
-  .box-shadow(inset 0 1px 2px rgba(0,0,0,.1));
-}
-
-// Bar of progress
-.progress-bar {
-  float: left;
-  width: 0%;
-  height: 100%;
-  font-size: @font-size-small;
-  line-height: @line-height-computed;
-  color: @progress-bar-color;
-  text-align: center;
-  background-color: @progress-bar-bg;
-  .box-shadow(inset 0 -1px 0 rgba(0,0,0,.15));
-  .transition(width .6s ease);
-}
-
-// Striped bars
-//
-// `.progress-striped .progress-bar` is deprecated as of v3.2.0 in favor of the
-// `.progress-bar-striped` class, which you just add to an existing
-// `.progress-bar`.
-.progress-striped .progress-bar,
-.progress-bar-striped {
-  #gradient > .striped();
-  background-size: 40px 40px;
-}
-
-// Call animation for the active one
-//
-// `.progress.active .progress-bar` is deprecated as of v3.2.0 in favor of the
-// `.progress-bar.active` approach.
-.progress.active .progress-bar,
-.progress-bar.active {
-  .animation(progress-bar-stripes 2s linear infinite);
-}
-
-
-// Variations
-// -------------------------
-
-.progress-bar-success {
-  .progress-bar-variant(@progress-bar-success-bg);
-}
-
-.progress-bar-info {
-  .progress-bar-variant(@progress-bar-info-bg);
-}
-
-.progress-bar-warning {
-  .progress-bar-variant(@progress-bar-warning-bg);
-}
-
-.progress-bar-danger {
-  .progress-bar-variant(@progress-bar-danger-bg);
-}
diff --git a/3rdparty/fmt/doc/bootstrap/responsive-embed.less b/3rdparty/fmt/doc/bootstrap/responsive-embed.less
deleted file mode 100644
index 080a5118..00000000
--- a/3rdparty/fmt/doc/bootstrap/responsive-embed.less
+++ /dev/null
@@ -1,35 +0,0 @@
-// Embeds responsive
-//
-// Credit: Nicolas Gallagher and SUIT CSS.
-
-.embed-responsive {
-  position: relative;
-  display: block;
-  height: 0;
-  padding: 0;
-  overflow: hidden;
-
-  .embed-responsive-item,
-  iframe,
-  embed,
-  object,
-  video {
-    position: absolute;
-    top: 0;
-    left: 0;
-    bottom: 0;
-    height: 100%;
-    width: 100%;
-    border: 0;
-  }
-}
-
-// Modifier class for 16:9 aspect ratio
-.embed-responsive-16by9 {
-  padding-bottom: 56.25%;
-}
-
-// Modifier class for 4:3 aspect ratio
-.embed-responsive-4by3 {
-  padding-bottom: 75%;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/responsive-utilities.less b/3rdparty/fmt/doc/bootstrap/responsive-utilities.less
deleted file mode 100644
index b1db31d7..00000000
--- a/3rdparty/fmt/doc/bootstrap/responsive-utilities.less
+++ /dev/null
@@ -1,194 +0,0 @@
-//
-// Responsive: Utility classes
-// --------------------------------------------------
-
-
-// IE10 in Windows (Phone) 8
-//
-// Support for responsive views via media queries is kind of borked in IE10, for
-// Surface/desktop in split view and for Windows Phone 8. This particular fix
-// must be accompanied by a snippet of JavaScript to sniff the user agent and
-// apply some conditional CSS to *only* the Surface/desktop Windows 8. Look at
-// our Getting Started page for more information on this bug.
-//
-// For more information, see the following:
-//
-// Issue: https://github.com/twbs/bootstrap/issues/10497
-// Docs: http://getbootstrap.com/getting-started/#support-ie10-width
-// Source: http://timkadlec.com/2013/01/windows-phone-8-and-device-width/
-// Source: http://timkadlec.com/2012/10/ie10-snap-mode-and-responsive-design/
-
-@-ms-viewport {
-  width: device-width;
-}
-
-
-// Visibility utilities
-// Note: Deprecated .visible-xs, .visible-sm, .visible-md, and .visible-lg as of v3.2.0
-.visible-xs,
-.visible-sm,
-.visible-md,
-.visible-lg {
-  .responsive-invisibility();
-}
-
-.visible-xs-block,
-.visible-xs-inline,
-.visible-xs-inline-block,
-.visible-sm-block,
-.visible-sm-inline,
-.visible-sm-inline-block,
-.visible-md-block,
-.visible-md-inline,
-.visible-md-inline-block,
-.visible-lg-block,
-.visible-lg-inline,
-.visible-lg-inline-block {
-  display: none !important;
-}
-
-.visible-xs {
-  @media (max-width: @screen-xs-max) {
-    .responsive-visibility();
-  }
-}
-.visible-xs-block {
-  @media (max-width: @screen-xs-max) {
-    display: block !important;
-  }
-}
-.visible-xs-inline {
-  @media (max-width: @screen-xs-max) {
-    display: inline !important;
-  }
-}
-.visible-xs-inline-block {
-  @media (max-width: @screen-xs-max) {
-    display: inline-block !important;
-  }
-}
-
-.visible-sm {
-  @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
-    .responsive-visibility();
-  }
-}
-.visible-sm-block {
-  @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
-    display: block !important;
-  }
-}
-.visible-sm-inline {
-  @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
-    display: inline !important;
-  }
-}
-.visible-sm-inline-block {
-  @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
-    display: inline-block !important;
-  }
-}
-
-.visible-md {
-  @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
-    .responsive-visibility();
-  }
-}
-.visible-md-block {
-  @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
-    display: block !important;
-  }
-}
-.visible-md-inline {
-  @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
-    display: inline !important;
-  }
-}
-.visible-md-inline-block {
-  @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
-    display: inline-block !important;
-  }
-}
-
-.visible-lg {
-  @media (min-width: @screen-lg-min) {
-    .responsive-visibility();
-  }
-}
-.visible-lg-block {
-  @media (min-width: @screen-lg-min) {
-    display: block !important;
-  }
-}
-.visible-lg-inline {
-  @media (min-width: @screen-lg-min) {
-    display: inline !important;
-  }
-}
-.visible-lg-inline-block {
-  @media (min-width: @screen-lg-min) {
-    display: inline-block !important;
-  }
-}
-
-.hidden-xs {
-  @media (max-width: @screen-xs-max) {
-    .responsive-invisibility();
-  }
-}
-.hidden-sm {
-  @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
-    .responsive-invisibility();
-  }
-}
-.hidden-md {
-  @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
-    .responsive-invisibility();
-  }
-}
-.hidden-lg {
-  @media (min-width: @screen-lg-min) {
-    .responsive-invisibility();
-  }
-}
-
-
-// Print utilities
-//
-// Media queries are placed on the inside to be mixin-friendly.
-
-// Note: Deprecated .visible-print as of v3.2.0
-.visible-print {
-  .responsive-invisibility();
-
-  @media print {
-    .responsive-visibility();
-  }
-}
-.visible-print-block {
-  display: none !important;
-
-  @media print {
-    display: block !important;
-  }
-}
-.visible-print-inline {
-  display: none !important;
-
-  @media print {
-    display: inline !important;
-  }
-}
-.visible-print-inline-block {
-  display: none !important;
-
-  @media print {
-    display: inline-block !important;
-  }
-}
-
-.hidden-print {
-  @media print {
-    .responsive-invisibility();
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/scaffolding.less b/3rdparty/fmt/doc/bootstrap/scaffolding.less
deleted file mode 100644
index 47b1d5a1..00000000
--- a/3rdparty/fmt/doc/bootstrap/scaffolding.less
+++ /dev/null
@@ -1,162 +0,0 @@
-//
-// Scaffolding
-// --------------------------------------------------
-
-
-// Reset the box-sizing
-//
-// Heads up! This reset may cause conflicts with some third-party widgets.
-// For recommendations on resolving such conflicts, see
-// http://getbootstrap.com/getting-started/#third-box-sizing
-* {
-  .box-sizing(border-box);
-}
-*:before,
-*:after {
-  .box-sizing(border-box);
-}
-
-
-// Body reset
-
-html {
-  font-size: 10px;
-  -webkit-tap-highlight-color: rgba(0,0,0,0);
-}
-
-body {
-  font-family: @font-family-base;
-  font-size: @font-size-base;
-  line-height: @line-height-base;
-  color: @text-color;
-  background-color: @body-bg;
-}
-
-// Reset fonts for relevant elements
-input,
-button,
-select,
-textarea {
-  font-family: inherit;
-  font-size: inherit;
-  line-height: inherit;
-}
-
-
-// Links
-
-a {
-  color: @link-color;
-  text-decoration: none;
-
-  &:hover,
-  &:focus {
-    color: @link-hover-color;
-    text-decoration: @link-hover-decoration;
-  }
-
-  &:focus {
-    .tab-focus();
-  }
-}
-
-
-// Figures
-//
-// We reset this here because previously Normalize had no `figure` margins. This
-// ensures we don't break anyone's use of the element.
-
-figure {
-  margin: 0;
-}
-
-
-// Images
-
-img {
-  vertical-align: middle;
-}
-
-// Responsive images (ensure images don't scale beyond their parents)
-.img-responsive {
-  .img-responsive();
-}
-
-// Rounded corners
-.img-rounded {
-  border-radius: @border-radius-large;
-}
-
-// Image thumbnails
-//
-// Heads up! This is mixin-ed into thumbnails.less for `.thumbnail`.
-.img-thumbnail {
-  padding: @thumbnail-padding;
-  line-height: @line-height-base;
-  background-color: @thumbnail-bg;
-  border: 1px solid @thumbnail-border;
-  border-radius: @thumbnail-border-radius;
-  .transition(all .2s ease-in-out);
-
-  // Keep them at most 100% wide
-  .img-responsive(inline-block);
-}
-
-// Perfect circle
-.img-circle {
-  border-radius: 50%; // set radius in percents
-}
-
-
-// Horizontal rules
-
-hr {
-  margin-top:    @line-height-computed;
-  margin-bottom: @line-height-computed;
-  border: 0;
-  border-top: 1px solid @hr-border;
-}
-
-
-// Only display content to screen readers
-//
-// See: http://a11yproject.com/posts/how-to-hide-content/
-
-.sr-only {
-  position: absolute;
-  width: 1px;
-  height: 1px;
-  margin: -1px;
-  padding: 0;
-  overflow: hidden;
-  clip: rect(0,0,0,0);
-  border: 0;
-}
-
-// Use in conjunction with .sr-only to only display content when it's focused.
-// Useful for "Skip to main content" links; see http://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1
-// Credit: HTML5 Boilerplate
-
-.sr-only-focusable {
-  &:active,
-  &:focus {
-    position: static;
-    width: auto;
-    height: auto;
-    margin: 0;
-    overflow: visible;
-    clip: auto;
-  }
-}
-
-
-// iOS "clickable elements" fix for role="button"
-//
-// Fixes "clickability" issue (and more generally, the firing of events such as focus as well)
-// for traditionally non-focusable elements with role="button"
-// see https://developer.mozilla.org/en-US/docs/Web/Events/click#Safari_Mobile
-// Upstream patch for normalize.css submitted: https://github.com/necolas/normalize.css/pull/379 - remove this fix once that is merged
-
-[role="button"] {
-  cursor: pointer;
-}
\ No newline at end of file
diff --git a/3rdparty/fmt/doc/bootstrap/tables.less b/3rdparty/fmt/doc/bootstrap/tables.less
deleted file mode 100644
index 2242c036..00000000
--- a/3rdparty/fmt/doc/bootstrap/tables.less
+++ /dev/null
@@ -1,234 +0,0 @@
-//
-// Tables
-// --------------------------------------------------
-
-
-table {
-  background-color: @table-bg;
-}
-caption {
-  padding-top: @table-cell-padding;
-  padding-bottom: @table-cell-padding;
-  color: @text-muted;
-  text-align: left;
-}
-th {
-  text-align: left;
-}
-
-
-// Baseline styles
-
-.table {
-  width: 100%;
-  max-width: 100%;
-  margin-bottom: @line-height-computed;
-  // Cells
-  > thead,
-  > tbody,
-  > tfoot {
-    > tr {
-      > th,
-      > td {
-        padding: @table-cell-padding;
-        line-height: @line-height-base;
-        vertical-align: top;
-        border-top: 1px solid @table-border-color;
-      }
-    }
-  }
-  // Bottom align for column headings
-  > thead > tr > th {
-    vertical-align: bottom;
-    border-bottom: 2px solid @table-border-color;
-  }
-  // Remove top border from thead by default
-  > caption + thead,
-  > colgroup + thead,
-  > thead:first-child {
-    > tr:first-child {
-      > th,
-      > td {
-        border-top: 0;
-      }
-    }
-  }
-  // Account for multiple tbody instances
-  > tbody + tbody {
-    border-top: 2px solid @table-border-color;
-  }
-
-  // Nesting
-  .table {
-    background-color: @body-bg;
-  }
-}
-
-
-// Condensed table w/ half padding
-
-.table-condensed {
-  > thead,
-  > tbody,
-  > tfoot {
-    > tr {
-      > th,
-      > td {
-        padding: @table-condensed-cell-padding;
-      }
-    }
-  }
-}
-
-
-// Bordered version
-//
-// Add borders all around the table and between all the columns.
-
-.table-bordered {
-  border: 1px solid @table-border-color;
-  > thead,
-  > tbody,
-  > tfoot {
-    > tr {
-      > th,
-      > td {
-        border: 1px solid @table-border-color;
-      }
-    }
-  }
-  > thead > tr {
-    > th,
-    > td {
-      border-bottom-width: 2px;
-    }
-  }
-}
-
-
-// Zebra-striping
-//
-// Default zebra-stripe styles (alternating gray and transparent backgrounds)
-
-.table-striped {
-  > tbody > tr:nth-of-type(odd) {
-    background-color: @table-bg-accent;
-  }
-}
-
-
-// Hover effect
-//
-// Placed here since it has to come after the potential zebra striping
-
-.table-hover {
-  > tbody > tr:hover {
-    background-color: @table-bg-hover;
-  }
-}
-
-
-// Table cell sizing
-//
-// Reset default table behavior
-
-table col[class*="col-"] {
-  position: static; // Prevent border hiding in Firefox and IE9-11 (see https://github.com/twbs/bootstrap/issues/11623)
-  float: none;
-  display: table-column;
-}
-table {
-  td,
-  th {
-    &[class*="col-"] {
-      position: static; // Prevent border hiding in Firefox and IE9-11 (see https://github.com/twbs/bootstrap/issues/11623)
-      float: none;
-      display: table-cell;
-    }
-  }
-}
-
-
-// Table backgrounds
-//
-// Exact selectors below required to override `.table-striped` and prevent
-// inheritance to nested tables.
-
-// Generate the contextual variants
-.table-row-variant(active; @table-bg-active);
-.table-row-variant(success; @state-success-bg);
-.table-row-variant(info; @state-info-bg);
-.table-row-variant(warning; @state-warning-bg);
-.table-row-variant(danger; @state-danger-bg);
-
-
-// Responsive tables
-//
-// Wrap your tables in `.table-responsive` and we'll make them mobile friendly
-// by enabling horizontal scrolling. Only applies <768px. Everything above that
-// will display normally.
-
-.table-responsive {
-  overflow-x: auto;
-  min-height: 0.01%; // Workaround for IE9 bug (see https://github.com/twbs/bootstrap/issues/14837)
-
-  @media screen and (max-width: @screen-xs-max) {
-    width: 100%;
-    margin-bottom: (@line-height-computed * 0.75);
-    overflow-y: hidden;
-    -ms-overflow-style: -ms-autohiding-scrollbar;
-    border: 1px solid @table-border-color;
-
-    // Tighten up spacing
-    > .table {
-      margin-bottom: 0;
-
-      // Ensure the content doesn't wrap
-      > thead,
-      > tbody,
-      > tfoot {
-        > tr {
-          > th,
-          > td {
-            white-space: nowrap;
-          }
-        }
-      }
-    }
-
-    // Special overrides for the bordered tables
-    > .table-bordered {
-      border: 0;
-
-      // Nuke the appropriate borders so that the parent can handle them
-      > thead,
-      > tbody,
-      > tfoot {
-        > tr {
-          > th:first-child,
-          > td:first-child {
-            border-left: 0;
-          }
-          > th:last-child,
-          > td:last-child {
-            border-right: 0;
-          }
-        }
-      }
-
-      // Only nuke the last row's bottom-border in `tbody` and `tfoot` since
-      // chances are there will be only one `tr` in a `thead` and that would
-      // remove the border altogether.
-      > tbody,
-      > tfoot {
-        > tr:last-child {
-          > th,
-          > td {
-            border-bottom: 0;
-          }
-        }
-      }
-
-    }
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/theme.less b/3rdparty/fmt/doc/bootstrap/theme.less
deleted file mode 100644
index 6f2eb621..00000000
--- a/3rdparty/fmt/doc/bootstrap/theme.less
+++ /dev/null
@@ -1,273 +0,0 @@
-
-//
-// Load core variables and mixins
-// --------------------------------------------------
-
-@import "variables.less";
-@import "mixins.less";
-
-
-//
-// Buttons
-// --------------------------------------------------
-
-// Common styles
-.btn-default,
-.btn-primary,
-.btn-success,
-.btn-info,
-.btn-warning,
-.btn-danger {
-  text-shadow: 0 -1px 0 rgba(0,0,0,.2);
-  @shadow: inset 0 1px 0 rgba(255,255,255,.15), 0 1px 1px rgba(0,0,0,.075);
-  .box-shadow(@shadow);
-
-  // Reset the shadow
-  &:active,
-  &.active {
-    .box-shadow(inset 0 3px 5px rgba(0,0,0,.125));
-  }
-
-  .badge {
-    text-shadow: none;
-  }
-}
-
-// Mixin for generating new styles
-.btn-styles(@btn-color: #555) {
-  #gradient > .vertical(@start-color: @btn-color; @end-color: darken(@btn-color, 12%));
-  .reset-filter(); // Disable gradients for IE9 because filter bleeds through rounded corners; see https://github.com/twbs/bootstrap/issues/10620
-  background-repeat: repeat-x;
-  border-color: darken(@btn-color, 14%);
-
-  &:hover,
-  &:focus  {
-    background-color: darken(@btn-color, 12%);
-    background-position: 0 -15px;
-  }
-
-  &:active,
-  &.active {
-    background-color: darken(@btn-color, 12%);
-    border-color: darken(@btn-color, 14%);
-  }
-
-  &.disabled,
-  &:disabled,
-  &[disabled] {
-    background-color: darken(@btn-color, 12%);
-    background-image: none;
-  }
-}
-
-// Common styles
-.btn {
-  // Remove the gradient for the pressed/active state
-  &:active,
-  &.active {
-    background-image: none;
-  }
-}
-
-// Apply the mixin to the buttons
-.btn-default { .btn-styles(@btn-default-bg); text-shadow: 0 1px 0 #fff; border-color: #ccc; }
-.btn-primary { .btn-styles(@btn-primary-bg); }
-.btn-success { .btn-styles(@btn-success-bg); }
-.btn-info    { .btn-styles(@btn-info-bg); }
-.btn-warning { .btn-styles(@btn-warning-bg); }
-.btn-danger  { .btn-styles(@btn-danger-bg); }
-
-
-//
-// Images
-// --------------------------------------------------
-
-.thumbnail,
-.img-thumbnail {
-  .box-shadow(0 1px 2px rgba(0,0,0,.075));
-}
-
-
-//
-// Dropdowns
-// --------------------------------------------------
-
-.dropdown-menu > li > a:hover,
-.dropdown-menu > li > a:focus {
-  #gradient > .vertical(@start-color: @dropdown-link-hover-bg; @end-color: darken(@dropdown-link-hover-bg, 5%));
-  background-color: darken(@dropdown-link-hover-bg, 5%);
-}
-.dropdown-menu > .active > a,
-.dropdown-menu > .active > a:hover,
-.dropdown-menu > .active > a:focus {
-  #gradient > .vertical(@start-color: @dropdown-link-active-bg; @end-color: darken(@dropdown-link-active-bg, 5%));
-  background-color: darken(@dropdown-link-active-bg, 5%);
-}
-
-
-//
-// Navbar
-// --------------------------------------------------
-
-// Default navbar
-.navbar-default {
-  #gradient > .vertical(@start-color: lighten(@navbar-default-bg, 10%); @end-color: @navbar-default-bg);
-  .reset-filter(); // Remove gradient in IE<10 to fix bug where dropdowns don't get triggered
-  border-radius: @navbar-border-radius;
-  @shadow: inset 0 1px 0 rgba(255,255,255,.15), 0 1px 5px rgba(0,0,0,.075);
-  .box-shadow(@shadow);
-
-  .navbar-nav > .open > a,
-  .navbar-nav > .active > a {
-    #gradient > .vertical(@start-color: darken(@navbar-default-link-active-bg, 5%); @end-color: darken(@navbar-default-link-active-bg, 2%));
-    .box-shadow(inset 0 3px 9px rgba(0,0,0,.075));
-  }
-}
-.navbar-brand,
-.navbar-nav > li > a {
-  text-shadow: 0 1px 0 rgba(255,255,255,.25);
-}
-
-// Inverted navbar
-.navbar-inverse {
-  #gradient > .vertical(@start-color: lighten(@navbar-inverse-bg, 10%); @end-color: @navbar-inverse-bg);
-  .reset-filter(); // Remove gradient in IE<10 to fix bug where dropdowns don't get triggered; see https://github.com/twbs/bootstrap/issues/10257
-
-  .navbar-nav > .open > a,
-  .navbar-nav > .active > a {
-    #gradient > .vertical(@start-color: @navbar-inverse-link-active-bg; @end-color: lighten(@navbar-inverse-link-active-bg, 2.5%));
-    .box-shadow(inset 0 3px 9px rgba(0,0,0,.25));
-  }
-
-  .navbar-brand,
-  .navbar-nav > li > a {
-    text-shadow: 0 -1px 0 rgba(0,0,0,.25);
-  }
-}
-
-// Undo rounded corners in static and fixed navbars
-.navbar-static-top,
-.navbar-fixed-top,
-.navbar-fixed-bottom {
-  border-radius: 0;
-}
-
-// Fix active state of dropdown items in collapsed mode
-@media (max-width: @grid-float-breakpoint-max) {
-  .navbar .navbar-nav .open .dropdown-menu > .active > a {
-    &,
-    &:hover,
-    &:focus {
-      color: #fff;
-      #gradient > .vertical(@start-color: @dropdown-link-active-bg; @end-color: darken(@dropdown-link-active-bg, 5%));
-    }
-  }
-}
-
-
-//
-// Alerts
-// --------------------------------------------------
-
-// Common styles
-.alert {
-  text-shadow: 0 1px 0 rgba(255,255,255,.2);
-  @shadow: inset 0 1px 0 rgba(255,255,255,.25), 0 1px 2px rgba(0,0,0,.05);
-  .box-shadow(@shadow);
-}
-
-// Mixin for generating new styles
-.alert-styles(@color) {
-  #gradient > .vertical(@start-color: @color; @end-color: darken(@color, 7.5%));
-  border-color: darken(@color, 15%);
-}
-
-// Apply the mixin to the alerts
-.alert-success    { .alert-styles(@alert-success-bg); }
-.alert-info       { .alert-styles(@alert-info-bg); }
-.alert-warning    { .alert-styles(@alert-warning-bg); }
-.alert-danger     { .alert-styles(@alert-danger-bg); }
-
-
-//
-// Progress bars
-// --------------------------------------------------
-
-// Give the progress background some depth
-.progress {
-  #gradient > .vertical(@start-color: darken(@progress-bg, 4%); @end-color: @progress-bg)
-}
-
-// Mixin for generating new styles
-.progress-bar-styles(@color) {
-  #gradient > .vertical(@start-color: @color; @end-color: darken(@color, 10%));
-}
-
-// Apply the mixin to the progress bars
-.progress-bar            { .progress-bar-styles(@progress-bar-bg); }
-.progress-bar-success    { .progress-bar-styles(@progress-bar-success-bg); }
-.progress-bar-info       { .progress-bar-styles(@progress-bar-info-bg); }
-.progress-bar-warning    { .progress-bar-styles(@progress-bar-warning-bg); }
-.progress-bar-danger     { .progress-bar-styles(@progress-bar-danger-bg); }
-
-// Reset the striped class because our mixins don't do multiple gradients and
-// the above custom styles override the new `.progress-bar-striped` in v3.2.0.
-.progress-bar-striped {
-  #gradient > .striped();
-}
-
-
-//
-// List groups
-// --------------------------------------------------
-
-.list-group {
-  border-radius: @border-radius-base;
-  .box-shadow(0 1px 2px rgba(0,0,0,.075));
-}
-.list-group-item.active,
-.list-group-item.active:hover,
-.list-group-item.active:focus {
-  text-shadow: 0 -1px 0 darken(@list-group-active-bg, 10%);
-  #gradient > .vertical(@start-color: @list-group-active-bg; @end-color: darken(@list-group-active-bg, 7.5%));
-  border-color: darken(@list-group-active-border, 7.5%);
-
-  .badge {
-    text-shadow: none;
-  }
-}
-
-
-//
-// Panels
-// --------------------------------------------------
-
-// Common styles
-.panel {
-  .box-shadow(0 1px 2px rgba(0,0,0,.05));
-}
-
-// Mixin for generating new styles
-.panel-heading-styles(@color) {
-  #gradient > .vertical(@start-color: @color; @end-color: darken(@color, 5%));
-}
-
-// Apply the mixin to the panel headings only
-.panel-default > .panel-heading   { .panel-heading-styles(@panel-default-heading-bg); }
-.panel-primary > .panel-heading   { .panel-heading-styles(@panel-primary-heading-bg); }
-.panel-success > .panel-heading   { .panel-heading-styles(@panel-success-heading-bg); }
-.panel-info > .panel-heading      { .panel-heading-styles(@panel-info-heading-bg); }
-.panel-warning > .panel-heading   { .panel-heading-styles(@panel-warning-heading-bg); }
-.panel-danger > .panel-heading    { .panel-heading-styles(@panel-danger-heading-bg); }
-
-
-//
-// Wells
-// --------------------------------------------------
-
-.well {
-  #gradient > .vertical(@start-color: darken(@well-bg, 5%); @end-color: @well-bg);
-  border-color: darken(@well-bg, 10%);
-  @shadow: inset 0 1px 3px rgba(0,0,0,.05), 0 1px 0 rgba(255,255,255,.1);
-  .box-shadow(@shadow);
-}
diff --git a/3rdparty/fmt/doc/bootstrap/thumbnails.less b/3rdparty/fmt/doc/bootstrap/thumbnails.less
deleted file mode 100644
index 0713e67d..00000000
--- a/3rdparty/fmt/doc/bootstrap/thumbnails.less
+++ /dev/null
@@ -1,36 +0,0 @@
-//
-// Thumbnails
-// --------------------------------------------------
-
-
-// Mixin and adjust the regular image class
-.thumbnail {
-  display: block;
-  padding: @thumbnail-padding;
-  margin-bottom: @line-height-computed;
-  line-height: @line-height-base;
-  background-color: @thumbnail-bg;
-  border: 1px solid @thumbnail-border;
-  border-radius: @thumbnail-border-radius;
-  .transition(border .2s ease-in-out);
-
-  > img,
-  a > img {
-    &:extend(.img-responsive);
-    margin-left: auto;
-    margin-right: auto;
-  }
-
-  // Add a hover state for linked versions only
-  a&:hover,
-  a&:focus,
-  a&.active {
-    border-color: @link-color;
-  }
-
-  // Image captions
-  .caption {
-    padding: @thumbnail-caption-padding;
-    color: @thumbnail-caption-color;
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/tooltip.less b/3rdparty/fmt/doc/bootstrap/tooltip.less
deleted file mode 100644
index 9d568474..00000000
--- a/3rdparty/fmt/doc/bootstrap/tooltip.less
+++ /dev/null
@@ -1,102 +0,0 @@
-//
-// Tooltips
-// --------------------------------------------------
-
-
-// Base class
-.tooltip {
-  position: absolute;
-  z-index: @zindex-tooltip;
-  display: block;
-  // Reset font and text properties given new insertion method
-  font-family: @font-family-base;
-  font-size: @font-size-small;
-  font-weight: normal;
-  line-height: 1.4;
-  .opacity(0);
-
-  &.in     { .opacity(@tooltip-opacity); }
-  &.top    { margin-top:  -3px; padding: @tooltip-arrow-width 0; }
-  &.right  { margin-left:  3px; padding: 0 @tooltip-arrow-width; }
-  &.bottom { margin-top:   3px; padding: @tooltip-arrow-width 0; }
-  &.left   { margin-left: -3px; padding: 0 @tooltip-arrow-width; }
-}
-
-// Wrapper for the tooltip content
-.tooltip-inner {
-  max-width: @tooltip-max-width;
-  padding: 3px 8px;
-  color: @tooltip-color;
-  text-align: center;
-  text-decoration: none;
-  background-color: @tooltip-bg;
-  border-radius: @border-radius-base;
-}
-
-// Arrows
-.tooltip-arrow {
-  position: absolute;
-  width: 0;
-  height: 0;
-  border-color: transparent;
-  border-style: solid;
-}
-// Note: Deprecated .top-left, .top-right, .bottom-left, and .bottom-right as of v3.3.1
-.tooltip {
-  &.top .tooltip-arrow {
-    bottom: 0;
-    left: 50%;
-    margin-left: -@tooltip-arrow-width;
-    border-width: @tooltip-arrow-width @tooltip-arrow-width 0;
-    border-top-color: @tooltip-arrow-color;
-  }
-  &.top-left .tooltip-arrow {
-    bottom: 0;
-    right: @tooltip-arrow-width;
-    margin-bottom: -@tooltip-arrow-width;
-    border-width: @tooltip-arrow-width @tooltip-arrow-width 0;
-    border-top-color: @tooltip-arrow-color;
-  }
-  &.top-right .tooltip-arrow {
-    bottom: 0;
-    left: @tooltip-arrow-width;
-    margin-bottom: -@tooltip-arrow-width;
-    border-width: @tooltip-arrow-width @tooltip-arrow-width 0;
-    border-top-color: @tooltip-arrow-color;
-  }
-  &.right .tooltip-arrow {
-    top: 50%;
-    left: 0;
-    margin-top: -@tooltip-arrow-width;
-    border-width: @tooltip-arrow-width @tooltip-arrow-width @tooltip-arrow-width 0;
-    border-right-color: @tooltip-arrow-color;
-  }
-  &.left .tooltip-arrow {
-    top: 50%;
-    right: 0;
-    margin-top: -@tooltip-arrow-width;
-    border-width: @tooltip-arrow-width 0 @tooltip-arrow-width @tooltip-arrow-width;
-    border-left-color: @tooltip-arrow-color;
-  }
-  &.bottom .tooltip-arrow {
-    top: 0;
-    left: 50%;
-    margin-left: -@tooltip-arrow-width;
-    border-width: 0 @tooltip-arrow-width @tooltip-arrow-width;
-    border-bottom-color: @tooltip-arrow-color;
-  }
-  &.bottom-left .tooltip-arrow {
-    top: 0;
-    right: @tooltip-arrow-width;
-    margin-top: -@tooltip-arrow-width;
-    border-width: 0 @tooltip-arrow-width @tooltip-arrow-width;
-    border-bottom-color: @tooltip-arrow-color;
-  }
-  &.bottom-right .tooltip-arrow {
-    top: 0;
-    left: @tooltip-arrow-width;
-    margin-top: -@tooltip-arrow-width;
-    border-width: 0 @tooltip-arrow-width @tooltip-arrow-width;
-    border-bottom-color: @tooltip-arrow-color;
-  }
-}
diff --git a/3rdparty/fmt/doc/bootstrap/type.less b/3rdparty/fmt/doc/bootstrap/type.less
deleted file mode 100644
index 68ba6017..00000000
--- a/3rdparty/fmt/doc/bootstrap/type.less
+++ /dev/null
@@ -1,302 +0,0 @@
-//
-// Typography
-// --------------------------------------------------
-
-
-// Headings
-// -------------------------
-
-h1, h2, h3, h4, h5, h6,
-.h1, .h2, .h3, .h4, .h5, .h6 {
-  font-family: @headings-font-family;
-  font-weight: @headings-font-weight;
-  line-height: @headings-line-height;
-  color: @headings-color;
-
-  small,
-  .small {
-    font-weight: normal;
-    line-height: 1;
-    color: @headings-small-color;
-  }
-}
-
-h1, .h1,
-h2, .h2,
-h3, .h3 {
-  margin-top: @line-height-computed;
-  margin-bottom: (@line-height-computed / 2);
-
-  small,
-  .small {
-    font-size: 65%;
-  }
-}
-h4, .h4,
-h5, .h5,
-h6, .h6 {
-  margin-top: (@line-height-computed / 2);
-  margin-bottom: (@line-height-computed / 2);
-
-  small,
-  .small {
-    font-size: 75%;
-  }
-}
-
-h1, .h1 { font-size: @font-size-h1; }
-h2, .h2 { font-size: @font-size-h2; }
-h3, .h3 { font-size: @font-size-h3; }
-h4, .h4 { font-size: @font-size-h4; }
-h5, .h5 { font-size: @font-size-h5; }
-h6, .h6 { font-size: @font-size-h6; }
-
-
-// Body text
-// -------------------------
-
-p {
-  margin: 0 0 (@line-height-computed / 2);
-}
-
-.lead {
-  margin-bottom: @line-height-computed;
-  font-size: floor((@font-size-base * 1.15));
-  font-weight: 300;
-  line-height: 1.4;
-
-  @media (min-width: @screen-sm-min) {
-    font-size: (@font-size-base * 1.5);
-  }
-}
-
-
-// Emphasis & misc
-// -------------------------
-
-// Ex: (12px small font / 14px base font) * 100% = about 85%
-small,
-.small {
-  font-size: floor((100% * @font-size-small / @font-size-base));
-}
-
-mark,
-.mark {
-  background-color: @state-warning-bg;
-  padding: .2em;
-}
-
-// Alignment
-.text-left           { text-align: left; }
-.text-right          { text-align: right; }
-.text-center         { text-align: center; }
-.text-justify        { text-align: justify; }
-.text-nowrap         { white-space: nowrap; }
-
-// Transformation
-.text-lowercase      { text-transform: lowercase; }
-.text-uppercase      { text-transform: uppercase; }
-.text-capitalize     { text-transform: capitalize; }
-
-// Contextual colors
-.text-muted {
-  color: @text-muted;
-}
-.text-primary {
-  .text-emphasis-variant(@brand-primary);
-}
-.text-success {
-  .text-emphasis-variant(@state-success-text);
-}
-.text-info {
-  .text-emphasis-variant(@state-info-text);
-}
-.text-warning {
-  .text-emphasis-variant(@state-warning-text);
-}
-.text-danger {
-  .text-emphasis-variant(@state-danger-text);
-}
-
-// Contextual backgrounds
-// For now we'll leave these alongside the text classes until v4 when we can
-// safely shift things around (per SemVer rules).
-.bg-primary {
-  // Given the contrast here, this is the only class to have its color inverted
-  // automatically.
-  color: #fff;
-  .bg-variant(@brand-primary);
-}
-.bg-success {
-  .bg-variant(@state-success-bg);
-}
-.bg-info {
-  .bg-variant(@state-info-bg);
-}
-.bg-warning {
-  .bg-variant(@state-warning-bg);
-}
-.bg-danger {
-  .bg-variant(@state-danger-bg);
-}
-
-
-// Page header
-// -------------------------
-
-.page-header {
-  padding-bottom: ((@line-height-computed / 2) - 1);
-  margin: (@line-height-computed * 2) 0 @line-height-computed;
-  border-bottom: 1px solid @page-header-border-color;
-}
-
-
-// Lists
-// -------------------------
-
-// Unordered and Ordered lists
-ul,
-ol {
-  margin-top: 0;
-  margin-bottom: (@line-height-computed / 2);
-  ul,
-  ol {
-    margin-bottom: 0;
-  }
-}
-
-// List options
-
-// Unstyled keeps list items block level, just removes default browser padding and list-style
-.list-unstyled {
-  padding-left: 0;
-  list-style: none;
-}
-
-// Inline turns list items into inline-block
-.list-inline {
-  .list-unstyled();
-  margin-left: -5px;
-
-  > li {
-    display: inline-block;
-    padding-left: 5px;
-    padding-right: 5px;
-  }
-}
-
-// Description Lists
-dl {
-  margin-top: 0; // Remove browser default
-  margin-bottom: @line-height-computed;
-}
-dt,
-dd {
-  line-height: @line-height-base;
-}
-dt {
-  font-weight: bold;
-}
-dd {
-  margin-left: 0; // Undo browser default
-}
-
-// Horizontal description lists
-//
-// Defaults to being stacked without any of the below styles applied, until the
-// grid breakpoint is reached (default of ~768px).
-
-.dl-horizontal {
-  dd {
-    &:extend(.clearfix all); // Clear the floated `dt` if an empty `dd` is present
-  }
-
-  @media (min-width: @grid-float-breakpoint) {
-    dt {
-      float: left;
-      width: (@dl-horizontal-offset - 20);
-      clear: left;
-      text-align: right;
-      .text-overflow();
-    }
-    dd {
-      margin-left: @dl-horizontal-offset;
-    }
-  }
-}
-
-
-// Misc
-// -------------------------
-
-// Abbreviations and acronyms
-abbr[title],
-// Add data-* attribute to help out our tooltip plugin, per https://github.com/twbs/bootstrap/issues/5257
-abbr[data-original-title] {
-  cursor: help;
-  border-bottom: 1px dotted @abbr-border-color;
-}
-.initialism {
-  font-size: 90%;
-  .text-uppercase();
-}
-
-// Blockquotes
-blockquote {
-  padding: (@line-height-computed / 2) @line-height-computed;
-  margin: 0 0 @line-height-computed;
-  font-size: @blockquote-font-size;
-  border-left: 5px solid @blockquote-border-color;
-
-  p,
-  ul,
-  ol {
-    &:last-child {
-      margin-bottom: 0;
-    }
-  }
-
-  // Note: Deprecated small and .small as of v3.1.0
-  // Context: https://github.com/twbs/bootstrap/issues/11660
-  footer,
-  small,
-  .small {
-    display: block;
-    font-size: 80%; // back to default font-size
-    line-height: @line-height-base;
-    color: @blockquote-small-color;
-
-    &:before {
-      content: '\2014 \00A0'; // em dash, nbsp
-    }
-  }
-}
-
-// Opposite alignment of blockquote
-//
-// Heads up: `blockquote.pull-right` has been deprecated as of v3.1.0.
-.blockquote-reverse,
-blockquote.pull-right {
-  padding-right: 15px;
-  padding-left: 0;
-  border-right: 5px solid @blockquote-border-color;
-  border-left: 0;
-  text-align: right;
-
-  // Account for citation
-  footer,
-  small,
-  .small {
-    &:before { content: ''; }
-    &:after {
-      content: '\00A0 \2014'; // nbsp, em dash
-    }
-  }
-}
-
-// Addresses
-address {
-  margin-bottom: @line-height-computed;
-  font-style: normal;
-  line-height: @line-height-base;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/utilities.less b/3rdparty/fmt/doc/bootstrap/utilities.less
deleted file mode 100644
index 7a8ca27a..00000000
--- a/3rdparty/fmt/doc/bootstrap/utilities.less
+++ /dev/null
@@ -1,55 +0,0 @@
-//
-// Utility classes
-// --------------------------------------------------
-
-
-// Floats
-// -------------------------
-
-.clearfix {
-  .clearfix();
-}
-.center-block {
-  .center-block();
-}
-.pull-right {
-  float: right !important;
-}
-.pull-left {
-  float: left !important;
-}
-
-
-// Toggling content
-// -------------------------
-
-// Note: Deprecated .hide in favor of .hidden or .sr-only (as appropriate) in v3.0.1
-.hide {
-  display: none !important;
-}
-.show {
-  display: block !important;
-}
-.invisible {
-  visibility: hidden;
-}
-.text-hide {
-  .text-hide();
-}
-
-
-// Hide from screenreaders and browsers
-//
-// Credit: HTML5 Boilerplate
-
-.hidden {
-  display: none !important;
-}
-
-
-// For Affix plugin
-// -------------------------
-
-.affix {
-  position: fixed;
-}
diff --git a/3rdparty/fmt/doc/bootstrap/variables.less b/3rdparty/fmt/doc/bootstrap/variables.less
deleted file mode 100644
index b5fb9d02..00000000
--- a/3rdparty/fmt/doc/bootstrap/variables.less
+++ /dev/null
@@ -1,861 +0,0 @@
-//
-// Variables
-// --------------------------------------------------
-
-
-//== Colors
-//
-//## Gray and brand colors for use across Bootstrap.
-
-@gray-base:              #000;
-@gray-darker:            lighten(@gray-base, 13.5%); // #222
-@gray-dark:              lighten(@gray-base, 20%);   // #333
-@gray:                   lighten(@gray-base, 33.5%); // #555
-@gray-light:             lighten(@gray-base, 46.7%); // #777
-@gray-lighter:           lighten(@gray-base, 93.5%); // #eee
-
-@brand-primary:         darken(#428bca, 6.5%); // #337ab7
-@brand-success:         #5cb85c;
-@brand-info:            #5bc0de;
-@brand-warning:         #f0ad4e;
-@brand-danger:          #d9534f;
-
-
-//== Scaffolding
-//
-//## Settings for some of the most global styles.
-
-//** Background color for `<body>`.
-@body-bg:               #fff;
-//** Global text color on `<body>`.
-@text-color:            @gray-dark;
-
-//** Global textual link color.
-@link-color:            @brand-primary;
-//** Link hover color set via `darken()` function.
-@link-hover-color:      darken(@link-color, 15%);
-//** Link hover decoration.
-@link-hover-decoration: underline;
-
-
-//== Typography
-//
-//## Font, line-height, and color for body text, headings, and more.
-
-@font-family-sans-serif:  "Helvetica Neue", Helvetica, Arial, sans-serif;
-@font-family-serif:       Georgia, "Times New Roman", Times, serif;
-//** Default monospace fonts for `<code>`, `<kbd>`, and `<pre>`.
-@font-family-monospace:   Menlo, Monaco, Consolas, "Courier New", monospace;
-@font-family-base:        @font-family-sans-serif;
-
-@font-size-base:          14px;
-@font-size-large:         ceil((@font-size-base * 1.25)); // ~18px
-@font-size-small:         ceil((@font-size-base * 0.85)); // ~12px
-
-@font-size-h1:            floor((@font-size-base * 2.6)); // ~36px
-@font-size-h2:            floor((@font-size-base * 2.15)); // ~30px
-@font-size-h3:            ceil((@font-size-base * 1.7)); // ~24px
-@font-size-h4:            ceil((@font-size-base * 1.25)); // ~18px
-@font-size-h5:            @font-size-base;
-@font-size-h6:            ceil((@font-size-base * 0.85)); // ~12px
-
-//** Unit-less `line-height` for use in components like buttons.
-@line-height-base:        1.428571429; // 20/14
-//** Computed "line-height" (`font-size` * `line-height`) for use with `margin`, `padding`, etc.
-@line-height-computed:    floor((@font-size-base * @line-height-base)); // ~20px
-
-//** By default, this inherits from the `<body>`.
-@headings-font-family:    inherit;
-@headings-font-weight:    500;
-@headings-line-height:    1.1;
-@headings-color:          inherit;
-
-
-//== Iconography
-//
-//## Specify custom location and filename of the included Glyphicons icon font. Useful for those including Bootstrap via Bower.
-
-//** Load fonts from this directory.
-@icon-font-path:          "../fonts/";
-//** File name for all font files.
-@icon-font-name:          "glyphicons-halflings-regular";
-//** Element ID within SVG icon file.
-@icon-font-svg-id:        "glyphicons_halflingsregular";
-
-
-//== Components
-//
-//## Define common padding and border radius sizes and more. Values based on 14px text and 1.428 line-height (~20px to start).
-
-@padding-base-vertical:     6px;
-@padding-base-horizontal:   12px;
-
-@padding-large-vertical:    10px;
-@padding-large-horizontal:  16px;
-
-@padding-small-vertical:    5px;
-@padding-small-horizontal:  10px;
-
-@padding-xs-vertical:       1px;
-@padding-xs-horizontal:     5px;
-
-@line-height-large:         1.3333333; // extra decimals for Win 8.1 Chrome
-@line-height-small:         1.5;
-
-@border-radius-base:        4px;
-@border-radius-large:       6px;
-@border-radius-small:       3px;
-
-//** Global color for active items (e.g., navs or dropdowns).
-@component-active-color:    #fff;
-//** Global background color for active items (e.g., navs or dropdowns).
-@component-active-bg:       @brand-primary;
-
-//** Width of the `border` for generating carets that indicator dropdowns.
-@caret-width-base:          4px;
-//** Carets increase slightly in size for larger components.
-@caret-width-large:         5px;
-
-
-//== Tables
-//
-//## Customizes the `.table` component with basic values, each used across all table variations.
-
-//** Padding for `<th>`s and `<td>`s.
-@table-cell-padding:            8px;
-//** Padding for cells in `.table-condensed`.
-@table-condensed-cell-padding:  5px;
-
-//** Default background color used for all tables.
-@table-bg:                      transparent;
-//** Background color used for `.table-striped`.
-@table-bg-accent:               #f9f9f9;
-//** Background color used for `.table-hover`.
-@table-bg-hover:                #f5f5f5;
-@table-bg-active:               @table-bg-hover;
-
-//** Border color for table and cell borders.
-@table-border-color:            #ddd;
-
-
-//== Buttons
-//
-//## For each of Bootstrap's buttons, define text, background and border color.
-
-@btn-font-weight:                normal;
-
-@btn-default-color:              #333;
-@btn-default-bg:                 #fff;
-@btn-default-border:             #ccc;
-
-@btn-primary-color:              #fff;
-@btn-primary-bg:                 @brand-primary;
-@btn-primary-border:             darken(@btn-primary-bg, 5%);
-
-@btn-success-color:              #fff;
-@btn-success-bg:                 @brand-success;
-@btn-success-border:             darken(@btn-success-bg, 5%);
-
-@btn-info-color:                 #fff;
-@btn-info-bg:                    @brand-info;
-@btn-info-border:                darken(@btn-info-bg, 5%);
-
-@btn-warning-color:              #fff;
-@btn-warning-bg:                 @brand-warning;
-@btn-warning-border:             darken(@btn-warning-bg, 5%);
-
-@btn-danger-color:               #fff;
-@btn-danger-bg:                  @brand-danger;
-@btn-danger-border:              darken(@btn-danger-bg, 5%);
-
-@btn-link-disabled-color:        @gray-light;
-
-
-//== Forms
-//
-//##
-
-//** `<input>` background color
-@input-bg:                       #fff;
-//** `<input disabled>` background color
-@input-bg-disabled:              @gray-lighter;
-
-//** Text color for `<input>`s
-@input-color:                    @gray;
-//** `<input>` border color
-@input-border:                   #ccc;
-
-// TODO: Rename `@input-border-radius` to `@input-border-radius-base` in v4
-//** Default `.form-control` border radius
-// This has no effect on `<select>`s in some browsers, due to the limited stylability of `<select>`s in CSS.
-@input-border-radius:            @border-radius-base;
-//** Large `.form-control` border radius
-@input-border-radius-large:      @border-radius-large;
-//** Small `.form-control` border radius
-@input-border-radius-small:      @border-radius-small;
-
-//** Border color for inputs on focus
-@input-border-focus:             #66afe9;
-
-//** Placeholder text color
-@input-color-placeholder:        #999;
-
-//** Default `.form-control` height
-@input-height-base:              (@line-height-computed + (@padding-base-vertical * 2) + 2);
-//** Large `.form-control` height
-@input-height-large:             (ceil(@font-size-large * @line-height-large) + (@padding-large-vertical * 2) + 2);
-//** Small `.form-control` height
-@input-height-small:             (floor(@font-size-small * @line-height-small) + (@padding-small-vertical * 2) + 2);
-
-//** `.form-group` margin
-@form-group-margin-bottom:       15px;
-
-@legend-color:                   @gray-dark;
-@legend-border-color:            #e5e5e5;
-
-//** Background color for textual input addons
-@input-group-addon-bg:           @gray-lighter;
-//** Border color for textual input addons
-@input-group-addon-border-color: @input-border;
-
-//** Disabled cursor for form controls and buttons.
-@cursor-disabled:                not-allowed;
-
-
-//== Dropdowns
-//
-//## Dropdown menu container and contents.
-
-//** Background for the dropdown menu.
-@dropdown-bg:                    #fff;
-//** Dropdown menu `border-color`.
-@dropdown-border:                rgba(0,0,0,.15);
-//** Dropdown menu `border-color` **for IE8**.
-@dropdown-fallback-border:       #ccc;
-//** Divider color for between dropdown items.
-@dropdown-divider-bg:            #e5e5e5;
-
-//** Dropdown link text color.
-@dropdown-link-color:            @gray-dark;
-//** Hover color for dropdown links.
-@dropdown-link-hover-color:      darken(@gray-dark, 5%);
-//** Hover background for dropdown links.
-@dropdown-link-hover-bg:         #f5f5f5;
-
-//** Active dropdown menu item text color.
-@dropdown-link-active-color:     @component-active-color;
-//** Active dropdown menu item background color.
-@dropdown-link-active-bg:        @component-active-bg;
-
-//** Disabled dropdown menu item background color.
-@dropdown-link-disabled-color:   @gray-light;
-
-//** Text color for headers within dropdown menus.
-@dropdown-header-color:          @gray-light;
-
-//** Deprecated `@dropdown-caret-color` as of v3.1.0
-@dropdown-caret-color:           #000;
-
-
-//-- Z-index master list
-//
-// Warning: Avoid customizing these values. They're used for a bird's eye view
-// of components dependent on the z-axis and are designed to all work together.
-//
-// Note: These variables are not generated into the Customizer.
-
-@zindex-navbar:            1000;
-@zindex-dropdown:          1000;
-@zindex-popover:           1060;
-@zindex-tooltip:           1070;
-@zindex-navbar-fixed:      1030;
-@zindex-modal-background:  1040;
-@zindex-modal:             1050;
-
-
-//== Media queries breakpoints
-//
-//## Define the breakpoints at which your layout will change, adapting to different screen sizes.
-
-// Extra small screen / phone
-//** Deprecated `@screen-xs` as of v3.0.1
-@screen-xs:                  480px;
-//** Deprecated `@screen-xs-min` as of v3.2.0
-@screen-xs-min:              @screen-xs;
-//** Deprecated `@screen-phone` as of v3.0.1
-@screen-phone:               @screen-xs-min;
-
-// Small screen / tablet
-//** Deprecated `@screen-sm` as of v3.0.1
-@screen-sm:                  768px;
-@screen-sm-min:              @screen-sm;
-//** Deprecated `@screen-tablet` as of v3.0.1
-@screen-tablet:              @screen-sm-min;
-
-// Medium screen / desktop
-//** Deprecated `@screen-md` as of v3.0.1
-@screen-md:                  992px;
-@screen-md-min:              @screen-md;
-//** Deprecated `@screen-desktop` as of v3.0.1
-@screen-desktop:             @screen-md-min;
-
-// Large screen / wide desktop
-//** Deprecated `@screen-lg` as of v3.0.1
-@screen-lg:                  1200px;
-@screen-lg-min:              @screen-lg;
-//** Deprecated `@screen-lg-desktop` as of v3.0.1
-@screen-lg-desktop:          @screen-lg-min;
-
-// So media queries don't overlap when required, provide a maximum
-@screen-xs-max:              (@screen-sm-min - 1);
-@screen-sm-max:              (@screen-md-min - 1);
-@screen-md-max:              (@screen-lg-min - 1);
-
-
-//== Grid system
-//
-//## Define your custom responsive grid.
-
-//** Number of columns in the grid.
-@grid-columns:              12;
-//** Padding between columns. Gets divided in half for the left and right.
-@grid-gutter-width:         30px;
-// Navbar collapse
-//** Point at which the navbar becomes uncollapsed.
-@grid-float-breakpoint:     @screen-sm-min;
-//** Point at which the navbar begins collapsing.
-@grid-float-breakpoint-max: (@grid-float-breakpoint - 1);
-
-
-//== Container sizes
-//
-//## Define the maximum width of `.container` for different screen sizes.
-
-// Small screen / tablet
-@container-tablet:             (720px + @grid-gutter-width);
-//** For `@screen-sm-min` and up.
-@container-sm:                 @container-tablet;
-
-// Medium screen / desktop
-@container-desktop:            (940px + @grid-gutter-width);
-//** For `@screen-md-min` and up.
-@container-md:                 @container-desktop;
-
-// Large screen / wide desktop
-@container-large-desktop:      (1140px + @grid-gutter-width);
-//** For `@screen-lg-min` and up.
-@container-lg:                 @container-large-desktop;
-
-
-//== Navbar
-//
-//##
-
-// Basics of a navbar
-@navbar-height:                    50px;
-@navbar-margin-bottom:             @line-height-computed;
-@navbar-border-radius:             @border-radius-base;
-@navbar-padding-horizontal:        floor((@grid-gutter-width / 2));
-@navbar-padding-vertical:          ((@navbar-height - @line-height-computed) / 2);
-@navbar-collapse-max-height:       340px;
-
-@navbar-default-color:             #777;
-@navbar-default-bg:                #f8f8f8;
-@navbar-default-border:            darken(@navbar-default-bg, 6.5%);
-
-// Navbar links
-@navbar-default-link-color:                #777;
-@navbar-default-link-hover-color:          #333;
-@navbar-default-link-hover-bg:             transparent;
-@navbar-default-link-active-color:         #555;
-@navbar-default-link-active-bg:            darken(@navbar-default-bg, 6.5%);
-@navbar-default-link-disabled-color:       #ccc;
-@navbar-default-link-disabled-bg:          transparent;
-
-// Navbar brand label
-@navbar-default-brand-color:               @navbar-default-link-color;
-@navbar-default-brand-hover-color:         darken(@navbar-default-brand-color, 10%);
-@navbar-default-brand-hover-bg:            transparent;
-
-// Navbar toggle
-@navbar-default-toggle-hover-bg:           #ddd;
-@navbar-default-toggle-icon-bar-bg:        #888;
-@navbar-default-toggle-border-color:       #ddd;
-
-
-// Inverted navbar
-// Reset inverted navbar basics
-@navbar-inverse-color:                      lighten(@gray-light, 15%);
-@navbar-inverse-bg:                         #222;
-@navbar-inverse-border:                     darken(@navbar-inverse-bg, 10%);
-
-// Inverted navbar links
-@navbar-inverse-link-color:                 lighten(@gray-light, 15%);
-@navbar-inverse-link-hover-color:           #fff;
-@navbar-inverse-link-hover-bg:              transparent;
-@navbar-inverse-link-active-color:          @navbar-inverse-link-hover-color;
-@navbar-inverse-link-active-bg:             darken(@navbar-inverse-bg, 10%);
-@navbar-inverse-link-disabled-color:        #444;
-@navbar-inverse-link-disabled-bg:           transparent;
-
-// Inverted navbar brand label
-@navbar-inverse-brand-color:                @navbar-inverse-link-color;
-@navbar-inverse-brand-hover-color:          #fff;
-@navbar-inverse-brand-hover-bg:             transparent;
-
-// Inverted navbar toggle
-@navbar-inverse-toggle-hover-bg:            #333;
-@navbar-inverse-toggle-icon-bar-bg:         #fff;
-@navbar-inverse-toggle-border-color:        #333;
-
-
-//== Navs
-//
-//##
-
-//=== Shared nav styles
-@nav-link-padding:                          10px 15px;
-@nav-link-hover-bg:                         @gray-lighter;
-
-@nav-disabled-link-color:                   @gray-light;
-@nav-disabled-link-hover-color:             @gray-light;
-
-//== Tabs
-@nav-tabs-border-color:                     #ddd;
-
-@nav-tabs-link-hover-border-color:          @gray-lighter;
-
-@nav-tabs-active-link-hover-bg:             @body-bg;
-@nav-tabs-active-link-hover-color:          @gray;
-@nav-tabs-active-link-hover-border-color:   #ddd;
-
-@nav-tabs-justified-link-border-color:            #ddd;
-@nav-tabs-justified-active-link-border-color:     @body-bg;
-
-//== Pills
-@nav-pills-border-radius:                   @border-radius-base;
-@nav-pills-active-link-hover-bg:            @component-active-bg;
-@nav-pills-active-link-hover-color:         @component-active-color;
-
-
-//== Pagination
-//
-//##
-
-@pagination-color:                     @link-color;
-@pagination-bg:                        #fff;
-@pagination-border:                    #ddd;
-
-@pagination-hover-color:               @link-hover-color;
-@pagination-hover-bg:                  @gray-lighter;
-@pagination-hover-border:              #ddd;
-
-@pagination-active-color:              #fff;
-@pagination-active-bg:                 @brand-primary;
-@pagination-active-border:             @brand-primary;
-
-@pagination-disabled-color:            @gray-light;
-@pagination-disabled-bg:               #fff;
-@pagination-disabled-border:           #ddd;
-
-
-//== Pager
-//
-//##
-
-@pager-bg:                             @pagination-bg;
-@pager-border:                         @pagination-border;
-@pager-border-radius:                  15px;
-
-@pager-hover-bg:                       @pagination-hover-bg;
-
-@pager-active-bg:                      @pagination-active-bg;
-@pager-active-color:                   @pagination-active-color;
-
-@pager-disabled-color:                 @pagination-disabled-color;
-
-
-//== Jumbotron
-//
-//##
-
-@jumbotron-padding:              30px;
-@jumbotron-color:                inherit;
-@jumbotron-bg:                   @gray-lighter;
-@jumbotron-heading-color:        inherit;
-@jumbotron-font-size:            ceil((@font-size-base * 1.5));
-
-
-//== Form states and alerts
-//
-//## Define colors for form feedback states and, by default, alerts.
-
-@state-success-text:             #3c763d;
-@state-success-bg:               #dff0d8;
-@state-success-border:           darken(spin(@state-success-bg, -10), 5%);
-
-@state-info-text:                #31708f;
-@state-info-bg:                  #d9edf7;
-@state-info-border:              darken(spin(@state-info-bg, -10), 7%);
-
-@state-warning-text:             #8a6d3b;
-@state-warning-bg:               #fcf8e3;
-@state-warning-border:           darken(spin(@state-warning-bg, -10), 5%);
-
-@state-danger-text:              #a94442;
-@state-danger-bg:                #f2dede;
-@state-danger-border:            darken(spin(@state-danger-bg, -10), 5%);
-
-
-//== Tooltips
-//
-//##
-
-//** Tooltip max width
-@tooltip-max-width:           200px;
-//** Tooltip text color
-@tooltip-color:               #fff;
-//** Tooltip background color
-@tooltip-bg:                  #000;
-@tooltip-opacity:             .9;
-
-//** Tooltip arrow width
-@tooltip-arrow-width:         5px;
-//** Tooltip arrow color
-@tooltip-arrow-color:         @tooltip-bg;
-
-
-//== Popovers
-//
-//##
-
-//** Popover body background color
-@popover-bg:                          #fff;
-//** Popover maximum width
-@popover-max-width:                   276px;
-//** Popover border color
-@popover-border-color:                rgba(0,0,0,.2);
-//** Popover fallback border color
-@popover-fallback-border-color:       #ccc;
-
-//** Popover title background color
-@popover-title-bg:                    darken(@popover-bg, 3%);
-
-//** Popover arrow width
-@popover-arrow-width:                 10px;
-//** Popover arrow color
-@popover-arrow-color:                 @popover-bg;
-
-//** Popover outer arrow width
-@popover-arrow-outer-width:           (@popover-arrow-width + 1);
-//** Popover outer arrow color
-@popover-arrow-outer-color:           fadein(@popover-border-color, 5%);
-//** Popover outer arrow fallback color
-@popover-arrow-outer-fallback-color:  darken(@popover-fallback-border-color, 20%);
-
-
-//== Labels
-//
-//##
-
-//** Default label background color
-@label-default-bg:            @gray-light;
-//** Primary label background color
-@label-primary-bg:            @brand-primary;
-//** Success label background color
-@label-success-bg:            @brand-success;
-//** Info label background color
-@label-info-bg:               @brand-info;
-//** Warning label background color
-@label-warning-bg:            @brand-warning;
-//** Danger label background color
-@label-danger-bg:             @brand-danger;
-
-//** Default label text color
-@label-color:                 #fff;
-//** Default text color of a linked label
-@label-link-hover-color:      #fff;
-
-
-//== Modals
-//
-//##
-
-//** Padding applied to the modal body
-@modal-inner-padding:         15px;
-
-//** Padding applied to the modal title
-@modal-title-padding:         15px;
-//** Modal title line-height
-@modal-title-line-height:     @line-height-base;
-
-//** Background color of modal content area
-@modal-content-bg:                             #fff;
-//** Modal content border color
-@modal-content-border-color:                   rgba(0,0,0,.2);
-//** Modal content border color **for IE8**
-@modal-content-fallback-border-color:          #999;
-
-//** Modal backdrop background color
-@modal-backdrop-bg:           #000;
-//** Modal backdrop opacity
-@modal-backdrop-opacity:      .5;
-//** Modal header border color
-@modal-header-border-color:   #e5e5e5;
-//** Modal footer border color
-@modal-footer-border-color:   @modal-header-border-color;
-
-@modal-lg:                    900px;
-@modal-md:                    600px;
-@modal-sm:                    300px;
-
-
-//== Alerts
-//
-//## Define alert colors, border radius, and padding.
-
-@alert-padding:               15px;
-@alert-border-radius:         @border-radius-base;
-@alert-link-font-weight:      bold;
-
-@alert-success-bg:            @state-success-bg;
-@alert-success-text:          @state-success-text;
-@alert-success-border:        @state-success-border;
-
-@alert-info-bg:               @state-info-bg;
-@alert-info-text:             @state-info-text;
-@alert-info-border:           @state-info-border;
-
-@alert-warning-bg:            @state-warning-bg;
-@alert-warning-text:          @state-warning-text;
-@alert-warning-border:        @state-warning-border;
-
-@alert-danger-bg:             @state-danger-bg;
-@alert-danger-text:           @state-danger-text;
-@alert-danger-border:         @state-danger-border;
-
-
-//== Progress bars
-//
-//##
-
-//** Background color of the whole progress component
-@progress-bg:                 #f5f5f5;
-//** Progress bar text color
-@progress-bar-color:          #fff;
-//** Variable for setting rounded corners on progress bar.
-@progress-border-radius:      @border-radius-base;
-
-//** Default progress bar color
-@progress-bar-bg:             @brand-primary;
-//** Success progress bar color
-@progress-bar-success-bg:     @brand-success;
-//** Warning progress bar color
-@progress-bar-warning-bg:     @brand-warning;
-//** Danger progress bar color
-@progress-bar-danger-bg:      @brand-danger;
-//** Info progress bar color
-@progress-bar-info-bg:        @brand-info;
-
-
-//== List group
-//
-//##
-
-//** Background color on `.list-group-item`
-@list-group-bg:                 #fff;
-//** `.list-group-item` border color
-@list-group-border:             #ddd;
-//** List group border radius
-@list-group-border-radius:      @border-radius-base;
-
-//** Background color of single list items on hover
-@list-group-hover-bg:           #f5f5f5;
-//** Text color of active list items
-@list-group-active-color:       @component-active-color;
-//** Background color of active list items
-@list-group-active-bg:          @component-active-bg;
-//** Border color of active list elements
-@list-group-active-border:      @list-group-active-bg;
-//** Text color for content within active list items
-@list-group-active-text-color:  lighten(@list-group-active-bg, 40%);
-
-//** Text color of disabled list items
-@list-group-disabled-color:      @gray-light;
-//** Background color of disabled list items
-@list-group-disabled-bg:         @gray-lighter;
-//** Text color for content within disabled list items
-@list-group-disabled-text-color: @list-group-disabled-color;
-
-@list-group-link-color:         #555;
-@list-group-link-hover-color:   @list-group-link-color;
-@list-group-link-heading-color: #333;
-
-
-//== Panels
-//
-//##
-
-@panel-bg:                    #fff;
-@panel-body-padding:          15px;
-@panel-heading-padding:       10px 15px;
-@panel-footer-padding:        @panel-heading-padding;
-@panel-border-radius:         @border-radius-base;
-
-//** Border color for elements within panels
-@panel-inner-border:          #ddd;
-@panel-footer-bg:             #f5f5f5;
-
-@panel-default-text:          @gray-dark;
-@panel-default-border:        #ddd;
-@panel-default-heading-bg:    #f5f5f5;
-
-@panel-primary-text:          #fff;
-@panel-primary-border:        @brand-primary;
-@panel-primary-heading-bg:    @brand-primary;
-
-@panel-success-text:          @state-success-text;
-@panel-success-border:        @state-success-border;
-@panel-success-heading-bg:    @state-success-bg;
-
-@panel-info-text:             @state-info-text;
-@panel-info-border:           @state-info-border;
-@panel-info-heading-bg:       @state-info-bg;
-
-@panel-warning-text:          @state-warning-text;
-@panel-warning-border:        @state-warning-border;
-@panel-warning-heading-bg:    @state-warning-bg;
-
-@panel-danger-text:           @state-danger-text;
-@panel-danger-border:         @state-danger-border;
-@panel-danger-heading-bg:     @state-danger-bg;
-
-
-//== Thumbnails
-//
-//##
-
-//** Padding around the thumbnail image
-@thumbnail-padding:           4px;
-//** Thumbnail background color
-@thumbnail-bg:                @body-bg;
-//** Thumbnail border color
-@thumbnail-border:            #ddd;
-//** Thumbnail border radius
-@thumbnail-border-radius:     @border-radius-base;
-
-//** Custom text color for thumbnail captions
-@thumbnail-caption-color:     @text-color;
-//** Padding around the thumbnail caption
-@thumbnail-caption-padding:   9px;
-
-
-//== Wells
-//
-//##
-
-@well-bg:                     #f5f5f5;
-@well-border:                 darken(@well-bg, 7%);
-
-
-//== Badges
-//
-//##
-
-@badge-color:                 #fff;
-//** Linked badge text color on hover
-@badge-link-hover-color:      #fff;
-@badge-bg:                    @gray-light;
-
-//** Badge text color in active nav link
-@badge-active-color:          @link-color;
-//** Badge background color in active nav link
-@badge-active-bg:             #fff;
-
-@badge-font-weight:           bold;
-@badge-line-height:           1;
-@badge-border-radius:         10px;
-
-
-//== Breadcrumbs
-//
-//##
-
-@breadcrumb-padding-vertical:   8px;
-@breadcrumb-padding-horizontal: 15px;
-//** Breadcrumb background color
-@breadcrumb-bg:                 #f5f5f5;
-//** Breadcrumb text color
-@breadcrumb-color:              #ccc;
-//** Text color of current page in the breadcrumb
-@breadcrumb-active-color:       @gray-light;
-//** Textual separator for between breadcrumb elements
-@breadcrumb-separator:          "/";
-
-
-//== Carousel
-//
-//##
-
-@carousel-text-shadow:                        0 1px 2px rgba(0,0,0,.6);
-
-@carousel-control-color:                      #fff;
-@carousel-control-width:                      15%;
-@carousel-control-opacity:                    .5;
-@carousel-control-font-size:                  20px;
-
-@carousel-indicator-active-bg:                #fff;
-@carousel-indicator-border-color:             #fff;
-
-@carousel-caption-color:                      #fff;
-
-
-//== Close
-//
-//##
-
-@close-font-weight:           bold;
-@close-color:                 #000;
-@close-text-shadow:           0 1px 0 #fff;
-
-
-//== Code
-//
-//##
-
-@code-color:                  #c7254e;
-@code-bg:                     #f9f2f4;
-
-@kbd-color:                   #fff;
-@kbd-bg:                      #333;
-
-@pre-bg:                      #f5f5f5;
-@pre-color:                   @gray-dark;
-@pre-border-color:            #ccc;
-@pre-scrollable-max-height:   340px;
-
-
-//== Type
-//
-//##
-
-//** Horizontal offset for forms and lists.
-@component-offset-horizontal: 180px;
-//** Text muted color
-@text-muted:                  @gray-light;
-//** Abbreviations and acronyms border color
-@abbr-border-color:           @gray-light;
-//** Headings small color
-@headings-small-color:        @gray-light;
-//** Blockquote small color
-@blockquote-small-color:      @gray-light;
-//** Blockquote font size
-@blockquote-font-size:        (@font-size-base * 1.25);
-//** Blockquote border color
-@blockquote-border-color:     @gray-lighter;
-//** Page header border color
-@page-header-border-color:    @gray-lighter;
-//** Width of horizontal description list titles
-@dl-horizontal-offset:        @component-offset-horizontal;
-//** Horizontal line color.
-@hr-border:                   @gray-lighter;
diff --git a/3rdparty/fmt/doc/bootstrap/wells.less b/3rdparty/fmt/doc/bootstrap/wells.less
deleted file mode 100644
index 15d072b0..00000000
--- a/3rdparty/fmt/doc/bootstrap/wells.less
+++ /dev/null
@@ -1,29 +0,0 @@
-//
-// Wells
-// --------------------------------------------------
-
-
-// Base class
-.well {
-  min-height: 20px;
-  padding: 19px;
-  margin-bottom: 20px;
-  background-color: @well-bg;
-  border: 1px solid @well-border;
-  border-radius: @border-radius-base;
-  .box-shadow(inset 0 1px 1px rgba(0,0,0,.05));
-  blockquote {
-    border-color: #ddd;
-    border-color: rgba(0,0,0,.15);
-  }
-}
-
-// Sizes
-.well-lg {
-  padding: 24px;
-  border-radius: @border-radius-large;
-}
-.well-sm {
-  padding: 9px;
-  border-radius: @border-radius-small;
-}
diff --git a/3rdparty/fmt/doc/build.py b/3rdparty/fmt/doc/build.py
deleted file mode 100644
index ae1ccfc8..00000000
--- a/3rdparty/fmt/doc/build.py
+++ /dev/null
@@ -1,118 +0,0 @@
-#!/usr/bin/env python3
-# Build the documentation.
-
-import errno, os, re, sys
-from subprocess import check_call, CalledProcessError, Popen, PIPE, STDOUT
-
-versions = ['1.0.0', '1.1.0', '2.0.0', '3.0.2', '4.0.0', '4.1.0', '5.0.0', '5.1.0', '5.2.0', '5.2.1', '5.3.0', '6.0.0', '6.1.0', '6.1.1', '6.1.2', '6.2.0', '6.2.1', '7.0.0', '7.0.1', '7.0.2', '7.0.3', '7.1.0', '7.1.1', '7.1.2', '7.1.3', '8.0.0', '8.0.1', '8.1.0', '8.1.1']
-
-class Pip:
-  def __init__(self, venv_dir):
-    self.path = os.path.join(venv_dir, 'bin', 'pip')
-
-  def install(self, package, commit=None):
-    "Install package using pip."
-    if commit:
-      package = 'git+https://github.com/{0}.git@{1}'.format(package, commit)
-    print('Installing {0}'.format(package))
-    check_call([self.path, 'install', package])
-
-def create_build_env(venv_dir='virtualenv'):
-  # Create virtualenv.
-  if not os.path.exists(venv_dir):
-    check_call(['python3', '-m', 'venv', venv_dir])
-  # Install Sphinx and Breathe. Require the exact version of Sphinx which is
-  # compatible with Breathe.
-  pip = Pip(venv_dir)
-  pip.install('wheel')
-  pip.install('six')
-  # See: https://github.com/sphinx-doc/sphinx/issues/9777
-  pip.install('docutils==0.17.1')
-  pip.install('sphinx-doc/sphinx', 'v3.3.0')
-  pip.install('michaeljones/breathe', 'v4.25.0')
-
-def build_docs(version='dev', **kwargs):
-  doc_dir = kwargs.get('doc_dir', os.path.dirname(os.path.realpath(__file__)))
-  work_dir = kwargs.get('work_dir', '.')
-  include_dir = kwargs.get(
-      'include_dir', os.path.join(os.path.dirname(doc_dir), 'include', 'fmt'))
-  # Build docs.
-  cmd = ['doxygen', '-']
-  p = Popen(cmd, stdin=PIPE, stdout=PIPE, stderr=STDOUT)
-  doxyxml_dir = os.path.join(work_dir, 'doxyxml')
-  out, _ = p.communicate(input=r'''
-      PROJECT_NAME      = fmt
-      GENERATE_LATEX    = NO
-      GENERATE_MAN      = NO
-      GENERATE_RTF      = NO
-      CASE_SENSE_NAMES  = NO
-      INPUT             = {0}/chrono.h {0}/color.h {0}/core.h {0}/compile.h \
-                          {0}/format.h {0}/os.h {0}/ostream.h {0}/printf.h \
-                          {0}/xchar.h
-      QUIET             = YES
-      JAVADOC_AUTOBRIEF = YES
-      AUTOLINK_SUPPORT  = NO
-      GENERATE_HTML     = NO
-      GENERATE_XML      = YES
-      XML_OUTPUT        = {1}
-      ALIASES           = "rst=\verbatim embed:rst"
-      ALIASES          += "endrst=\endverbatim"
-      MACRO_EXPANSION   = YES
-      PREDEFINED        = _WIN32=1 \
-                          __linux__=1 \
-                          FMT_ENABLE_IF(...)= \
-                          FMT_USE_VARIADIC_TEMPLATES=1 \
-                          FMT_USE_RVALUE_REFERENCES=1 \
-                          FMT_USE_USER_DEFINED_LITERALS=1 \
-                          FMT_USE_ALIAS_TEMPLATES=1 \
-                          FMT_API= \
-                          "FMT_BEGIN_NAMESPACE=namespace fmt {{" \
-                          "FMT_END_NAMESPACE=}}" \
-                          "FMT_STRING_ALIAS=1" \
-                          "FMT_VARIADIC(...)=" \
-                          "FMT_VARIADIC_W(...)=" \
-                          "FMT_DOC=1"
-      EXCLUDE_SYMBOLS   = fmt::formatter fmt::printf_formatter fmt::arg_join \
-                          fmt::basic_format_arg::handle
-    '''.format(include_dir, doxyxml_dir).encode('UTF-8'))
-  out = out.decode('utf-8')
-  internal_symbols = [
-    'fmt::detail::.*',
-    'basic_data<>',
-    'fmt::type_identity',
-    'fmt::dynamic_formatter'
-  ]
-  noisy_warnings = [
-    'warning: (Compound|Member .* of class) (' + '|'.join(internal_symbols) + \
-      ') is not documented.',
-    'warning: Internal inconsistency: .* does not belong to any container!'
-  ]
-  for w in noisy_warnings:
-      out = re.sub('.*' + w + '\n', '', out)
-  print(out)
-  if p.returncode != 0:
-    raise CalledProcessError(p.returncode, cmd)
-
-  html_dir = os.path.join(work_dir, 'html')
-  main_versions = reversed(versions[-3:])
-  check_call([os.path.join(work_dir, 'virtualenv', 'bin', 'sphinx-build'),
-              '-Dbreathe_projects.format=' + os.path.abspath(doxyxml_dir),
-              '-Dversion=' + version, '-Drelease=' + version,
-              '-Aversion=' + version, '-Aversions=' + ','.join(main_versions),
-              '-b', 'html', doc_dir, html_dir])
-  try:
-    check_call(['lessc', '--verbose', '--clean-css',
-                '--include-path=' + os.path.join(doc_dir, 'bootstrap'),
-                os.path.join(doc_dir, 'fmt.less'),
-                os.path.join(html_dir, '_static', 'fmt.css')])
-  except OSError as e:
-    if e.errno != errno.ENOENT:
-      raise
-    print('lessc not found; make sure that Less (http://lesscss.org/) ' +
-          'is installed')
-    sys.exit(1)
-  return html_dir
-
-if __name__ == '__main__':
-  create_build_env()
-  build_docs(sys.argv[1])
diff --git a/3rdparty/fmt/doc/conf.py b/3rdparty/fmt/doc/conf.py
deleted file mode 100644
index 0756192b..00000000
--- a/3rdparty/fmt/doc/conf.py
+++ /dev/null
@@ -1,256 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# format documentation build configuration file, created by
-# sphinx-quickstart on Tue Dec 18 06:46:16 2012.
-#
-# This file is execfile()d with the current directory set to its containing dir.
-#
-# Note that not all possible configuration values are present in this
-# autogenerated file.
-#
-# All configuration values have a default; values that are commented out
-# serve to show the default.
-
-import sys, os, re, subprocess
-
-# If extensions (or modules to document with autodoc) are in another directory,
-# add these directories to sys.path here. If the directory is relative to the
-# documentation root, use os.path.abspath to make it absolute, like shown here.
-#sys.path.insert(0, os.path.abspath('.'))
-
-# -- General configuration -----------------------------------------------------
-
-# If your documentation needs a minimal Sphinx version, state it here.
-needs_sphinx = '1.2'
-
-if os.environ.get('READTHEDOCS', None) == 'True':
-  subprocess.call('doxygen')
-
-# Add any Sphinx extension module names here, as strings. They can be extensions
-# coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = ['sphinx.ext.ifconfig', 'breathe']
-
-breathe_default_project = "format"
-breathe_domain_by_extension = {"h" : "cpp"}
-
-# Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
-
-# The suffix of source filenames.
-source_suffix = '.rst'
-
-# The encoding of source files.
-#source_encoding = 'utf-8-sig'
-
-# The master toctree document.
-#master_doc = 'contents'
-
-# General information about the project.
-project = u'fmt'
-copyright = u'2012-present, Victor Zverovich'
-
-# The version info for the project you're documenting, acts as replacement for
-# |version| and |release|, also used in various other places throughout the
-# built documents.
-#
-# The short X.Y version.
-
-# Version and release are passed from CMake.
-#version = None
-
-# The full version, including alpha/beta/rc tags.
-#release = version
-
-# The language for content autogenerated by Sphinx. Refer to documentation
-# for a list of supported languages.
-#language = None
-
-# There are two options for replacing |today|: either, you set today to some
-# non-false value, then it is used:
-#today = ''
-# Else, today_fmt is used as the format for a strftime call.
-#today_fmt = '%B %d, %Y'
-
-# List of patterns, relative to source directory, that match files and
-# directories to ignore when looking for source files.
-exclude_patterns = ['virtualenv']
-
-# The reST default role (used for this markup: `text`) to use for all documents.
-default_role = 'cpp:any'
-
-# If true, '()' will be appended to :func: etc. cross-reference text.
-#add_function_parentheses = True
-
-# If true, the current module name will be prepended to all description
-# unit titles (such as .. function::).
-#add_module_names = True
-
-# If true, sectionauthor and moduleauthor directives will be shown in the
-# output. They are ignored by default.
-#show_authors = False
-
-# The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
-
-highlight_language = 'c++'
-
-primary_domain = 'cpp'
-
-# A list of ignored prefixes for module index sorting.
-#modindex_common_prefix = []
-
-
-# -- Options for HTML output ---------------------------------------------------
-
-# The theme to use for HTML and HTML Help pages.  See the documentation for
-# a list of builtin themes.
-html_theme = 'basic-bootstrap'
-
-# Theme options are theme-specific and customize the look and feel of a theme
-# further.  For a list of options available for each theme, see the
-# documentation.
-#html_theme_options = {}
-
-# Add any paths that contain custom themes here, relative to this directory.
-html_theme_path = ['.']
-
-# The name for this set of Sphinx documents.  If None, it defaults to
-# "<project> v<release> documentation".
-#html_title = None
-
-# A shorter title for the navigation bar.  Default is the same as html_title.
-#html_short_title = None
-
-# The name of an image file (relative to this directory) to place at the top
-# of the sidebar.
-#html_logo = None
-
-# The name of an image file (within the static path) to use as favicon of the
-# docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
-# pixels large.
-#html_favicon = None
-
-# Add any paths that contain custom static files (such as style sheets) here,
-# relative to this directory. They are copied after the builtin static files,
-# so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
-
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-#html_last_updated_fmt = '%b %d, %Y'
-
-# If true, SmartyPants will be used to convert quotes and dashes to
-# typographically correct entities.
-#html_use_smartypants = True
-
-# Custom sidebar templates, maps document names to template names.
-html_sidebars = {
-  '**': ['localtoc.html', 'relations.html', 'sourcelink.html', 'searchbox.html']
-}
-
-# Additional templates that should be rendered to pages, maps page names to
-# template names.
-#html_additional_pages = {}
-
-# If false, no module index is generated.
-#html_domain_indices = True
-
-# If false, no index is generated.
-#html_use_index = True
-
-# If true, the index is split into individual pages for each letter.
-#html_split_index = False
-
-# If true, links to the reST sources are added to the pages.
-#html_show_sourcelink = True
-
-# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
-#html_show_sphinx = True
-
-# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
-#html_show_copyright = True
-
-# If true, an OpenSearch description file will be output, and all pages will
-# contain a <link> tag referring to it.  The value of this option must be the
-# base URL from which the finished HTML is served.
-#html_use_opensearch = ''
-
-# This is the file name suffix for HTML files (e.g. ".xhtml").
-#html_file_suffix = None
-
-# Output file base name for HTML help builder.
-htmlhelp_basename = 'formatdoc'
-
-
-# -- Options for LaTeX output --------------------------------------------------
-
-latex_elements = {
-# The paper size ('letterpaper' or 'a4paper').
-#'papersize': 'letterpaper',
-
-# The font size ('10pt', '11pt' or '12pt').
-#'pointsize': '10pt',
-
-# Additional stuff for the LaTeX preamble.
-#'preamble': '',
-}
-
-# Grouping the document tree into LaTeX files. List of tuples
-# (source start file, target name, title, author, documentclass [howto/manual]).
-latex_documents = [
-  ('index', 'format.tex', u'fmt documentation',
-   u'Victor Zverovich', 'manual'),
-]
-
-# The name of an image file (relative to this directory) to place at the top of
-# the title page.
-#latex_logo = None
-
-# For "manual" documents, if this is true, then toplevel headings are parts,
-# not chapters.
-#latex_use_parts = False
-
-# If true, show page references after internal links.
-#latex_show_pagerefs = False
-
-# If true, show URL addresses after external links.
-#latex_show_urls = False
-
-# Documents to append as an appendix to all manuals.
-#latex_appendices = []
-
-# If false, no module index is generated.
-#latex_domain_indices = True
-
-
-# -- Options for manual page output --------------------------------------------
-
-# One entry per manual page. List of tuples
-# (source start file, name, description, authors, manual section).
-man_pages = [
-    ('index', 'fmt', u'fmt documentation', [u'Victor Zverovich'], 1)
-]
-
-# If true, show URL addresses after external links.
-#man_show_urls = False
-
-
-# -- Options for Texinfo output ------------------------------------------------
-
-# Grouping the document tree into Texinfo files. List of tuples
-# (source start file, target name, title, author,
-#  dir menu entry, description, category)
-texinfo_documents = [
-  ('index', 'fmt', u'fmt documentation',
-   u'Victor Zverovich', 'fmt', 'One line description of project.',
-   'Miscellaneous'),
-]
-
-# Documents to append as an appendix to all manuals.
-#texinfo_appendices = []
-
-# If false, no module index is generated.
-#texinfo_domain_indices = True
-
-# How to display URL addresses: 'footnote', 'no', or 'inline'.
-#texinfo_show_urls = 'footnote'
diff --git a/3rdparty/fmt/doc/contents.rst b/3rdparty/fmt/doc/contents.rst
deleted file mode 100644
index d38691e4..00000000
--- a/3rdparty/fmt/doc/contents.rst
+++ /dev/null
@@ -1,10 +0,0 @@
-########
-Contents
-########
-
-.. toctree::
-   :maxdepth: 2
-
-   usage
-   api
-   syntax
diff --git a/3rdparty/fmt/doc/fmt.less b/3rdparty/fmt/doc/fmt.less
deleted file mode 100644
index 3a97b9fd..00000000
--- a/3rdparty/fmt/doc/fmt.less
+++ /dev/null
@@ -1,71 +0,0 @@
-@import 'bootstrap.less';
-
-@header-bg: #094d75;
-@icon-font-path: "fonts/";
-
-html {
-  overflow-y: scroll;
-}
-
-.navbar {
-  border-radius: 0;
-  margin-bottom: 0;
-  background-color: darken(@header-bg, 10%);
-}
-
-.jumbotron {
-  #gradient > .vertical(@header-bg; darken(@header-bg, 2%); 50%; 50%);
-  background-size: 100% 4px;
-  background-color: @header-bg;
-  background-repeat: repeat-y;
-  color: white;
-  text-align: center;
-}
-
-div.sphinxsidebar {
-  margin-left: 0;
-}
-
-// Keep content not too wide for better readability.
-.navbar-content, .content {
-  .make-md-column-offset(1);
-  .make-md-column(10);
-  .make-lg-column-offset(2);
-  .make-lg-column(8);
-}
-
-.footer {
-  padding-top: 20px;
-  padding-bottom: 20px;
-  border-top: 1px solid @gray-lighter;
-  text-align: center;
-}
-
-// Indent descriptions of classes, functions and macros.
-.class dd, .function dd, .macro dd {
-  margin-left: 20px;
-}
-
-// Remove Bootstrap padding for Sphinx containers.
-.breathe-sectiondef.container {
-  padding: 0;
-}
-
-// Remove Bootstrap padding for Sphinx code elements in API signatures.
-.descclassname, .descname {
-  padding: 0;
-}
-
-// Override center alignment in tables.
-td {
-  text-align: left;
-}
-
-p.rubric {
-  margin-top: 10px;
-}
-
-.github-btn {
-  border: 0;
-  overflow: hidden;
-}
diff --git a/3rdparty/fmt/doc/index.rst b/3rdparty/fmt/doc/index.rst
deleted file mode 100644
index 92221225..00000000
--- a/3rdparty/fmt/doc/index.rst
+++ /dev/null
@@ -1,198 +0,0 @@
-Overview
-========
-
-**{fmt}** is an open-source formatting library providing a fast and safe
-alternative to C stdio and C++ iostreams.
-
-.. raw:: html
-
-   <div class="panel panel-default">
-     <div class="panel-heading">What users say:</div>
-     <div class="panel-body">
-       Thanks for creating this library. It’s been a hole in C++ for
-       a long time. I’ve used both <code>boost::format</code> and
-       <code>loki::SPrintf</code>, and neither felt like the right answer.
-       This does.
-     </div>
-   </div>
-
-.. _format-api-intro:
-
-Format API
-----------
-
-The format API is similar in spirit to the C ``printf`` family of function but
-is safer, simpler and several times `faster
-<https://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html>`_
-than common standard library implementations.
-The `format string syntax <syntax.html>`_ is similar to the one used by
-`str.format <https://docs.python.org/3/library/stdtypes.html#str.format>`_ in
-Python:
-
-.. code:: c++
-
-  std::string s = fmt::format("The answer is {}.", 42);
-  
-The ``fmt::format`` function returns a string "The answer is 42.". You can use
-``fmt::memory_buffer`` to avoid constructing ``std::string``:
-
-.. code:: c++
-
-  auto out = fmt::memory_buffer();
-  format_to(std::back_inserter(out),
-            "For a moment, {} happened.", "nothing");
-  auto data = out.data(); // pointer to the formatted data
-  auto size = out.size(); // size of the formatted data
-
-The ``fmt::print`` function performs formatting and writes the result to a stream:
-
-.. code:: c++
-
-  fmt::print(stderr, "System error code = {}\n", errno);
-
-If you omit the file argument the function will print to ``stdout``:
-
-.. code:: c++
-
-  fmt::print("Don't {}\n", "panic");
-
-The format API also supports positional arguments useful for localization:
-
-.. code:: c++
-
-  fmt::print("I'd rather be {1} than {0}.", "right", "happy");
-
-You can pass named arguments with ``fmt::arg``:
-
-.. code:: c++
-
-  fmt::print("Hello, {name}! The answer is {number}. Goodbye, {name}.",
-             fmt::arg("name", "World"), fmt::arg("number", 42));
-
-If your compiler supports C++11 user-defined literals, the suffix ``_a`` offers 
-an alternative, slightly terser syntax for named arguments:
-
-.. code:: c++
-
-  using namespace fmt::literals;
-  fmt::print("Hello, {name}! The answer is {number}. Goodbye, {name}.",
-             "name"_a="World", "number"_a=42);
-
-.. _safety:
-
-Safety
-------
-
-The library is fully type safe, automatic memory management prevents buffer
-overflow, errors in format strings are reported using exceptions or at compile
-time. For example, the code
-
-.. code:: c++
-
-  fmt::format("The answer is {:d}", "forty-two");
-
-throws the ``format_error`` exception because the argument ``"forty-two"`` is a
-string while the format code ``d`` only applies to integers.
-
-The code
-
-.. code:: c++
-
-  format(FMT_STRING("The answer is {:d}"), "forty-two");
-
-reports a compile-time error on compilers that support relaxed ``constexpr``.
-See `here <api.html#c.fmt>`_ for details.
-
-The following code
-
-.. code:: c++
-
-  fmt::format("Cyrillic letter {}", L'\x42e');
-  
-produces a compile-time error because wide character ``L'\x42e'`` cannot be
-formatted into a narrow string. For comparison, writing a wide character to
-``std::ostream`` results in its numeric value being written to the stream
-(i.e. 1070 instead of letter 'ю' which is represented by ``L'\x42e'`` if we
-use Unicode) which is rarely desirable.
-
-Compact Binary Code
--------------------
-
-The library produces compact per-call compiled code. For example
-(`godbolt <https://godbolt.org/g/TZU4KF>`_),
-
-.. code:: c++
-
-   #include <fmt/core.h>
-
-   int main() {
-     fmt::print("The answer is {}.", 42);
-   }
-
-compiles to just
-
-.. code:: asm
-
-   main: # @main
-     sub rsp, 24
-     mov qword ptr [rsp], 42
-     mov rcx, rsp
-     mov edi, offset .L.str
-     mov esi, 17
-     mov edx, 1
-     call fmt::v7::vprint(fmt::v7::basic_string_view<char>, fmt::v7::format_args)
-     xor eax, eax
-     add rsp, 24
-     ret
-   .L.str:
-     .asciz "The answer is {}."
-
-.. _portability:
-
-Portability
------------
-
-The library is highly portable and relies only on a small set of C++11 features:
-
-* variadic templates
-* type traits
-* rvalue references
-* decltype
-* trailing return types
-* deleted functions
-* alias templates
-
-These are available in GCC 4.8, Clang 3.4, MSVC 19.0 (2015) and more recent
-compiler version. For older compilers use {fmt} `version 4.x
-<https://github.com/fmtlib/fmt/releases/tag/4.1.0>`_ which is maintained and
-only requires C++98.
-
-The output of all formatting functions is consistent across platforms.
-For example,
-
-.. code::
-
-  fmt::print("{}", std::numeric_limits<double>::infinity());
-
-always prints ``inf`` while the output of ``printf`` is platform-dependent.
-
-.. _ease-of-use:
-
-Ease of Use
------------
-
-{fmt} has a small self-contained code base with the core library consisting of
-just three header files and no external dependencies.
-A permissive MIT `license <https://github.com/fmtlib/fmt#license>`_ allows
-using the library both in open-source and commercial projects.
-
-`Learn more... <contents.html>`_
-
-.. raw:: html
-
-  <a class="btn btn-success" href="https://github.com/fmtlib/fmt">GitHub Repository</a>
-
-  <div class="section footer">
-    <iframe src="https://ghbtns.com/github-btn.html?user=fmtlib&amp;repo=fmt&amp;type=watch&amp;count=true"
-            class="github-btn" width="100" height="20"></iframe>
-  </div>
diff --git a/3rdparty/fmt/doc/python-license.txt b/3rdparty/fmt/doc/python-license.txt
deleted file mode 100644
index 88eed1f9..00000000
--- a/3rdparty/fmt/doc/python-license.txt
+++ /dev/null
@@ -1,290 +0,0 @@
-A. HISTORY OF THE SOFTWARE
-==========================
-
-Python was created in the early 1990s by Guido van Rossum at Stichting
-Mathematisch Centrum (CWI, see http://www.cwi.nl) in the Netherlands
-as a successor of a language called ABC.  Guido remains Python's
-principal author, although it includes many contributions from others.
-
-In 1995, Guido continued his work on Python at the Corporation for
-National Research Initiatives (CNRI, see http://www.cnri.reston.va.us)
-in Reston, Virginia where he released several versions of the
-software.
-
-In May 2000, Guido and the Python core development team moved to
-BeOpen.com to form the BeOpen PythonLabs team.  In October of the same
-year, the PythonLabs team moved to Digital Creations (now Zope
-Corporation, see http://www.zope.com).  In 2001, the Python Software
-Foundation (PSF, see http://www.python.org/psf/) was formed, a
-non-profit organization created specifically to own Python-related
-Intellectual Property.  Zope Corporation is a sponsoring member of
-the PSF.
-
-All Python releases are Open Source (see http://www.opensource.org for
-the Open Source Definition).  Historically, most, but not all, Python
-releases have also been GPL-compatible; the table below summarizes
-the various releases.
-
-    Release         Derived     Year        Owner       GPL-
-                    from                                compatible? (1)
-
-    0.9.0 thru 1.2              1991-1995   CWI         yes
-    1.3 thru 1.5.2  1.2         1995-1999   CNRI        yes
-    1.6             1.5.2       2000        CNRI        no
-    2.0             1.6         2000        BeOpen.com  no
-    1.6.1           1.6         2001        CNRI        yes (2)
-    2.1             2.0+1.6.1   2001        PSF         no
-    2.0.1           2.0+1.6.1   2001        PSF         yes
-    2.1.1           2.1+2.0.1   2001        PSF         yes
-    2.2             2.1.1       2001        PSF         yes
-    2.1.2           2.1.1       2002        PSF         yes
-    2.1.3           2.1.2       2002        PSF         yes
-    2.2.1           2.2         2002        PSF         yes
-    2.2.2           2.2.1       2002        PSF         yes
-    2.2.3           2.2.2       2003        PSF         yes
-    2.3             2.2.2       2002-2003   PSF         yes
-    2.3.1           2.3         2002-2003   PSF         yes
-    2.3.2           2.3.1       2002-2003   PSF         yes
-    2.3.3           2.3.2       2002-2003   PSF         yes
-    2.3.4           2.3.3       2004        PSF         yes
-    2.3.5           2.3.4       2005        PSF         yes
-    2.4             2.3         2004        PSF         yes
-    2.4.1           2.4         2005        PSF         yes
-    2.4.2           2.4.1       2005        PSF         yes
-    2.4.3           2.4.2       2006        PSF         yes
-    2.4.4           2.4.3       2006        PSF         yes
-    2.5             2.4         2006        PSF         yes
-    2.5.1           2.5         2007        PSF         yes
-    2.5.2           2.5.1       2008        PSF         yes
-    2.5.3           2.5.2       2008        PSF         yes
-    2.6             2.5         2008        PSF         yes
-    2.6.1           2.6         2008        PSF         yes
-    2.6.2           2.6.1       2009        PSF         yes
-    2.6.3           2.6.2       2009        PSF         yes
-    2.6.4           2.6.3       2009        PSF         yes
-    2.6.5           2.6.4       2010        PSF         yes
-    3.0             2.6         2008        PSF         yes
-    3.0.1           3.0         2009        PSF         yes
-    3.1             3.0.1       2009        PSF         yes
-    3.1.1           3.1         2009        PSF         yes
-    3.1.2           3.1.1       2010        PSF         yes
-    3.1.3           3.1.2       2010        PSF         yes
-    3.1.4           3.1.3       2011        PSF         yes
-    3.2             3.1         2011        PSF         yes
-    3.2.1           3.2         2011        PSF         yes
-    3.2.2           3.2.1       2011        PSF         yes
-    3.2.3           3.2.2       2012        PSF         yes
-    3.3.0           3.2         2012        PSF         yes
-
-Footnotes:
-
-(1) GPL-compatible doesn't mean that we're distributing Python under
-    the GPL.  All Python licenses, unlike the GPL, let you distribute
-    a modified version without making your changes open source.  The
-    GPL-compatible licenses make it possible to combine Python with
-    other software that is released under the GPL; the others don't.
-
-(2) According to Richard Stallman, 1.6.1 is not GPL-compatible,
-    because its license has a choice of law clause.  According to
-    CNRI, however, Stallman's lawyer has told CNRI's lawyer that 1.6.1
-    is "not incompatible" with the GPL.
-
-Thanks to the many outside volunteers who have worked under Guido's
-direction to make these releases possible.
-
-
-B. TERMS AND CONDITIONS FOR ACCESSING OR OTHERWISE USING PYTHON
-===============================================================
-
-PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
---------------------------------------------
-
-1. This LICENSE AGREEMENT is between the Python Software Foundation
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diff --git a/3rdparty/fmt/doc/syntax.rst b/3rdparty/fmt/doc/syntax.rst
deleted file mode 100644
index 9d3cb57c..00000000
--- a/3rdparty/fmt/doc/syntax.rst
+++ /dev/null
@@ -1,487 +0,0 @@
-.. _syntax:
-
-********************
-Format String Syntax
-********************
-
-Formatting functions such as :ref:`fmt::format() <format>` and
-:ref:`fmt::print() <print>` use the same format string syntax described in this
-section.
-
-Format strings contain "replacement fields" surrounded by curly braces ``{}``.
-Anything that is not contained in braces is considered literal text, which is
-copied unchanged to the output.  If you need to include a brace character in the
-literal text, it can be escaped by doubling: ``{{`` and ``}}``.
-
-The grammar for a replacement field is as follows:
-
-.. productionlist:: sf
-   replacement_field: "{" [`arg_id`] [":" (`format_spec` | `chrono_format_spec`)] "}"
-   arg_id: `integer` | `identifier`
-   integer: `digit`+
-   digit: "0"..."9"
-   identifier: `id_start` `id_continue`*
-   id_start: "a"..."z" | "A"..."Z" | "_"
-   id_continue: `id_start` | `digit`
-
-In less formal terms, the replacement field can start with an *arg_id*
-that specifies the argument whose value is to be formatted and inserted into
-the output instead of the replacement field.
-The *arg_id* is optionally followed by a *format_spec*, which is preceded by a
-colon ``':'``.  These specify a non-default format for the replacement value.
-
-See also the :ref:`formatspec` section.
-
-If the numerical arg_ids in a format string are 0, 1, 2, ... in sequence,
-they can all be omitted (not just some) and the numbers 0, 1, 2, ... will be
-automatically inserted in that order.
-
-Named arguments can be referred to by their names or indices.
-
-Some simple format string examples::
-
-   "First, thou shalt count to {0}" // References the first argument
-   "Bring me a {}"                  // Implicitly references the first argument
-   "From {} to {}"                  // Same as "From {0} to {1}"
-
-The *format_spec* field contains a specification of how the value should be
-presented, including such details as field width, alignment, padding, decimal
-precision and so on.  Each value type can define its own "formatting
-mini-language" or interpretation of the *format_spec*.
-
-Most built-in types support a common formatting mini-language, which is
-described in the next section.
-
-A *format_spec* field can also include nested replacement fields in certain
-positions within it. These nested replacement fields can contain only an
-argument id; format specifications are not allowed. This allows the formatting
-of a value to be dynamically specified.
-
-See the :ref:`formatexamples` section for some examples.
-
-.. _formatspec:
-
-Format Specification Mini-Language
-==================================
-
-"Format specifications" are used within replacement fields contained within a
-format string to define how individual values are presented (see
-:ref:`syntax`).  Each formattable type may define how the format
-specification is to be interpreted.
-
-Most built-in types implement the following options for format specifications,
-although some of the formatting options are only supported by the numeric types.
-
-The general form of a *standard format specifier* is:
-
-.. productionlist:: sf
-   format_spec: [[`fill`]`align`][`sign`]["#"]["0"][`width`]["." `precision`]["L"][`type`]
-   fill: <a character other than '{' or '}'>
-   align: "<" | ">" | "^"
-   sign: "+" | "-" | " "
-   width: `integer` | "{" [`arg_id`] "}"
-   precision: `integer` | "{" [`arg_id`] "}"
-   type: "a" | "A" | "b" | "B" | "c" | "d" | "e" | "E" | "f" | "F" | "g" | "G" |
-       : "o" | "p" | "s" | "x" | "X"
-
-The *fill* character can be any Unicode code point other than ``'{'`` or
-``'}'``. The presence of a fill character is signaled by the character following
-it, which must be one of the alignment options. If the second character of
-*format_spec* is not a valid alignment option, then it is assumed that both the
-fill character and the alignment option are absent.
-
-The meaning of the various alignment options is as follows:
-
-+---------+----------------------------------------------------------+
-| Option  | Meaning                                                  |
-+=========+==========================================================+
-| ``'<'`` | Forces the field to be left-aligned within the available |
-|         | space (this is the default for most objects).            |
-+---------+----------------------------------------------------------+
-| ``'>'`` | Forces the field to be right-aligned within the          |
-|         | available space (this is the default for numbers).       |
-+---------+----------------------------------------------------------+
-| ``'^'`` | Forces the field to be centered within the available     |
-|         | space.                                                   |
-+---------+----------------------------------------------------------+
-
-Note that unless a minimum field width is defined, the field width will always
-be the same size as the data to fill it, so that the alignment option has no
-meaning in this case.
-
-The *sign* option is only valid for number types, and can be one of the
-following:
-
-+---------+------------------------------------------------------------+
-| Option  | Meaning                                                    |
-+=========+============================================================+
-| ``'+'`` | indicates that a sign should be used for both              |
-|         | nonnegative as well as negative numbers.                   |
-+---------+------------------------------------------------------------+
-| ``'-'`` | indicates that a sign should be used only for negative     |
-|         | numbers (this is the default behavior).                    |
-+---------+------------------------------------------------------------+
-| space   | indicates that a leading space should be used on           |
-|         | nonnegative numbers, and a minus sign on negative numbers. |
-+---------+------------------------------------------------------------+
-
-The ``'#'`` option causes the "alternate form" to be used for the
-conversion.  The alternate form is defined differently for different
-types.  This option is only valid for integer and floating-point types.
-For integers, when binary, octal, or hexadecimal output is used, this
-option adds the prefix respective ``"0b"`` (``"0B"``), ``"0"``, or
-``"0x"`` (``"0X"``) to the output value.  Whether the prefix is
-lower-case or upper-case is determined by the case of the type
-specifier, for example, the prefix ``"0x"`` is used for the type ``'x'``
-and ``"0X"`` is used for ``'X'``.  For floating-point numbers the
-alternate form causes the result of the conversion to always contain a
-decimal-point character, even if no digits follow it. Normally, a
-decimal-point character appears in the result of these conversions
-only if a digit follows it. In addition, for ``'g'`` and ``'G'``
-conversions, trailing zeros are not removed from the result.
-
-.. ifconfig:: False
-
-   The ``','`` option signals the use of a comma for a thousands separator.
-   For a locale aware separator, use the ``'L'`` integer presentation type
-   instead.
-
-*width* is a decimal integer defining the minimum field width.  If not
-specified, then the field width will be determined by the content.
-
-Preceding the *width* field by a zero (``'0'``) character enables sign-aware
-zero-padding for numeric types. It forces the padding to be placed after the
-sign or base (if any) but before the digits. This is used for printing fields in
-the form '+000000120'. This option is only valid for numeric types and it has no
-effect on formatting of infinity and NaN.
-
-The *precision* is a decimal number indicating how many digits should be
-displayed after the decimal point for a floating-point value formatted with
-``'f'`` and ``'F'``, or before and after the decimal point for a floating-point
-value formatted with ``'g'`` or ``'G'``.  For non-number types the field
-indicates the maximum field size - in other words, how many characters will be
-used from the field content. The *precision* is not allowed for integer,
-character, Boolean, and pointer values. Note that a C string must be
-null-terminated even if precision is specified.
-
-The ``'L'`` option uses the current locale setting to insert the appropriate
-number separator characters. This option is only valid for numeric types.
-
-Finally, the *type* determines how the data should be presented.
-
-The available string presentation types are:
-
-+---------+----------------------------------------------------------+
-| Type    | Meaning                                                  |
-+=========+==========================================================+
-| ``'s'`` | String format. This is the default type for strings and  |
-|         | may be omitted.                                          |
-+---------+----------------------------------------------------------+
-| none    | The same as ``'s'``.                                     |
-+---------+----------------------------------------------------------+
-
-The available character presentation types are:
-
-+---------+----------------------------------------------------------+
-| Type    | Meaning                                                  |
-+=========+==========================================================+
-| ``'c'`` | Character format. This is the default type for           |
-|         | characters and may be omitted.                           |
-+---------+----------------------------------------------------------+
-| none    | The same as ``'c'``.                                     |
-+---------+----------------------------------------------------------+
-
-The available integer presentation types are:
-
-+---------+----------------------------------------------------------+
-| Type    | Meaning                                                  |
-+=========+==========================================================+
-| ``'b'`` | Binary format. Outputs the number in base 2. Using the   |
-|         | ``'#'`` option with this type adds the prefix ``"0b"``   |
-|         | to the output value.                                     |
-+---------+----------------------------------------------------------+
-| ``'B'`` | Binary format. Outputs the number in base 2. Using the   |
-|         | ``'#'`` option with this type adds the prefix ``"0B"``   |
-|         | to the output value.                                     |
-+---------+----------------------------------------------------------+
-| ``'c'`` | Character format. Outputs the number as a character.     |
-+---------+----------------------------------------------------------+
-| ``'d'`` | Decimal integer. Outputs the number in base 10.          |
-+---------+----------------------------------------------------------+
-| ``'o'`` | Octal format. Outputs the number in base 8.              |
-+---------+----------------------------------------------------------+
-| ``'x'`` | Hex format. Outputs the number in base 16, using         |
-|         | lower-case letters for the digits above 9. Using the     |
-|         | ``'#'`` option with this type adds the prefix ``"0x"``   |
-|         | to the output value.                                     |
-+---------+----------------------------------------------------------+
-| ``'X'`` | Hex format. Outputs the number in base 16, using         |
-|         | upper-case letters for the digits above 9. Using the     |
-|         | ``'#'`` option with this type adds the prefix ``"0X"``   |
-|         | to the output value.                                     |
-+---------+----------------------------------------------------------+
-| none    | The same as ``'d'``.                                     |
-+---------+----------------------------------------------------------+
-
-Integer presentation types can also be used with character and Boolean values.
-Boolean values are formatted using textual representation, either ``true`` or
-``false``, if the presentation type is not specified.
-
-The available presentation types for floating-point values are:
-
-+---------+----------------------------------------------------------+
-| Type    | Meaning                                                  |
-+=========+==========================================================+
-| ``'a'`` | Hexadecimal floating point format. Prints the number in  |
-|         | base 16 with prefix ``"0x"`` and lower-case letters for  |
-|         | digits above 9. Uses ``'p'`` to indicate the exponent.   |
-+---------+----------------------------------------------------------+
-| ``'A'`` | Same as ``'a'`` except it uses upper-case letters for    |
-|         | the prefix, digits above 9 and to indicate the exponent. |
-+---------+----------------------------------------------------------+
-| ``'e'`` | Exponent notation. Prints the number in scientific       |
-|         | notation using the letter 'e' to indicate the exponent.  |
-+---------+----------------------------------------------------------+
-| ``'E'`` | Exponent notation. Same as ``'e'`` except it uses an     |
-|         | upper-case ``'E'`` as the separator character.           |
-+---------+----------------------------------------------------------+
-| ``'f'`` | Fixed point. Displays the number as a fixed-point        |
-|         | number.                                                  |
-+---------+----------------------------------------------------------+
-| ``'F'`` | Fixed point. Same as ``'f'``, but converts ``nan`` to    |
-|         | ``NAN`` and ``inf`` to ``INF``.                          |
-+---------+----------------------------------------------------------+
-| ``'g'`` | General format.  For a given precision ``p >= 1``,       |
-|         | this rounds the number to ``p`` significant digits and   |
-|         | then formats the result in either fixed-point format     |
-|         | or in scientific notation, depending on its magnitude.   |
-|         |                                                          |
-|         | A precision of ``0`` is treated as equivalent to a       |
-|         | precision of ``1``.                                      |
-+---------+----------------------------------------------------------+
-| ``'G'`` | General format. Same as ``'g'`` except switches to       |
-|         | ``'E'`` if the number gets too large. The                |
-|         | representations of infinity and NaN are uppercased, too. |
-+---------+----------------------------------------------------------+
-| none    | Similar to ``'g'``, except that the default precision is |
-|         | as high as needed to represent the particular value.     |
-+---------+----------------------------------------------------------+
-
-.. ifconfig:: False
-
-   +---------+----------------------------------------------------------+
-   |         | The precise rules are as follows: suppose that the       |
-   |         | result formatted with presentation type ``'e'`` and      |
-   |         | precision ``p-1`` would have exponent ``exp``.  Then     |
-   |         | if ``-4 <= exp < p``, the number is formatted            |
-   |         | with presentation type ``'f'`` and precision             |
-   |         | ``p-1-exp``.  Otherwise, the number is formatted         |
-   |         | with presentation type ``'e'`` and precision ``p-1``.    |
-   |         | In both cases insignificant trailing zeros are removed   |
-   |         | from the significand, and the decimal point is also      |
-   |         | removed if there are no remaining digits following it.   |
-   |         |                                                          |
-   |         | Positive and negative infinity, positive and negative    |
-   |         | zero, and nans, are formatted as ``inf``, ``-inf``,      |
-   |         | ``0``, ``-0`` and ``nan`` respectively, regardless of    |
-   |         | the precision.                                           |
-   |         |                                                          |
-   +---------+----------------------------------------------------------+
-
-The available presentation types for pointers are:
-
-+---------+----------------------------------------------------------+
-| Type    | Meaning                                                  |
-+=========+==========================================================+
-| ``'p'`` | Pointer format. This is the default type for             |
-|         | pointers and may be omitted.                             |
-+---------+----------------------------------------------------------+
-| none    | The same as ``'p'``.                                     |
-+---------+----------------------------------------------------------+
-
-.. _chrono-specs:
-
-Chrono Format Specifications
-============================
-
-Format specifications for chrono types have the following syntax:
-
-.. productionlist:: sf
-   chrono_format_spec: [[`fill`]`align`][`width`]["." `precision`][`chrono_specs`]
-   chrono_specs: [`chrono_specs`] `conversion_spec` | `chrono_specs` `literal_char`
-   conversion_spec: "%" [`modifier`] `chrono_type`
-   literal_char: <a character other than '{', '}' or '%'>
-   modifier: "E" | "O"
-   chrono_type: "a" | "A" | "b" | "B" | "c" | "C" | "d" | "D" | "e" | "F" |
-              : "g" | "G" | "h" | "H" | "I" | "j" | "m" | "M" | "n" | "p" |
-              : "q" | "Q" | "r" | "R" | "S" | "t" | "T" | "u" | "U" | "V" |
-              : "w" | "W" | "x" | "X" | "y" | "Y" | "z" | "Z" | "%"
-
-Literal chars are copied unchanged to the output. Precision is valid only for
-``std::chrono::duration`` types with a floating-point representation type.
-
-The available presentation types (*chrono_type*) for chrono durations and time
-points are:
-
-+---------+--------------------------------------------------------------------+
-| Type    | Meaning                                                            |
-+=========+====================================================================+
-| ``'H'`` | The hour (24-hour clock) as a decimal number. If the result is a   |
-|         | single digit, it is prefixed with 0. The modified command ``%OH``  |
-|         | produces the locale's alternative representation.                  |
-+---------+--------------------------------------------------------------------+
-| ``'M'`` | The minute as a decimal number. If the result is a single digit,   |
-|         | it is prefixed with 0. The modified command ``%OM`` produces the   |
-|         | locale's alternative representation.                               |
-+---------+--------------------------------------------------------------------+
-| ``'S'`` | Seconds as a decimal number. If the number of seconds is less than |
-|         | 10, the result is prefixed with 0. If the precision of the input   |
-|         | cannot be exactly represented with seconds, then the format is a   |
-|         | decimal floating-point number with a fixed format and a precision  |
-|         | matching that of the precision of the input (or to a microseconds  |
-|         | precision if the conversion to floating-point decimal seconds      |
-|         | cannot be made within 18 fractional digits). The character for the |
-|         | decimal point is localized according to the locale. The modified   |
-|         | command ``%OS`` produces the locale's alternative representation.  |
-+---------+--------------------------------------------------------------------+
-
-Specifiers that have a calendaric component such as `'d'` (the day of month)
-are valid only for ``std::tm`` and not durations or time points.
-
-``std::tm`` uses the system's `strftime
-<https://en.cppreference.com/w/cpp/chrono/c/strftime>`_ so refer to its
-documentation for details on supported conversion specifiers. 
-
-.. _formatexamples:
-
-Format Examples
-===============
-
-This section contains examples of the format syntax and comparison with
-the printf formatting.
-
-In most of the cases the syntax is similar to the printf formatting, with the
-addition of the ``{}`` and with ``:`` used instead of ``%``.
-For example, ``"%03.2f"`` can be translated to ``"{:03.2f}"``.
-
-The new format syntax also supports new and different options, shown in the
-following examples.
-
-Accessing arguments by position::
-
-   fmt::format("{0}, {1}, {2}", 'a', 'b', 'c');
-   // Result: "a, b, c"
-   fmt::format("{}, {}, {}", 'a', 'b', 'c');
-   // Result: "a, b, c"
-   fmt::format("{2}, {1}, {0}", 'a', 'b', 'c');
-   // Result: "c, b, a"
-   fmt::format("{0}{1}{0}", "abra", "cad");  // arguments' indices can be repeated
-   // Result: "abracadabra"
-
-Aligning the text and specifying a width::
-
-   fmt::format("{:<30}", "left aligned");
-   // Result: "left aligned                  "
-   fmt::format("{:>30}", "right aligned");
-   // Result: "                 right aligned"
-   fmt::format("{:^30}", "centered");
-   // Result: "           centered           "
-   fmt::format("{:*^30}", "centered");  // use '*' as a fill char
-   // Result: "***********centered***********"
-
-Dynamic width::
-
-   fmt::format("{:<{}}", "left aligned", 30);
-   // Result: "left aligned                  "
-
-Dynamic precision::
-
-   fmt::format("{:.{}f}", 3.14, 1);
-   // Result: "3.1"
-
-Replacing ``%+f``, ``%-f``, and ``% f`` and specifying a sign::
-
-   fmt::format("{:+f}; {:+f}", 3.14, -3.14);  // show it always
-   // Result: "+3.140000; -3.140000"
-   fmt::format("{: f}; {: f}", 3.14, -3.14);  // show a space for positive numbers
-   // Result: " 3.140000; -3.140000"
-   fmt::format("{:-f}; {:-f}", 3.14, -3.14);  // show only the minus -- same as '{:f}; {:f}'
-   // Result: "3.140000; -3.140000"
-
-Replacing ``%x`` and ``%o`` and converting the value to different bases::
-
-   fmt::format("int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
-   // Result: "int: 42;  hex: 2a;  oct: 52; bin: 101010"
-   // with 0x or 0 or 0b as prefix:
-   fmt::format("int: {0:d};  hex: {0:#x};  oct: {0:#o};  bin: {0:#b}", 42);
-   // Result: "int: 42;  hex: 0x2a;  oct: 052;  bin: 0b101010"
-
-Padded hex byte with prefix and always prints both hex characters::
-
-   fmt::format("{:#04x}", 0);
-   // Result: "0x00"
-
-Box drawing using Unicode fill::
-
-   fmt::print(
-     "┌{0:─^{2}}┐\n"
-     "│{1: ^{2}}│\n"
-     "└{0:─^{2}}┘\n", "", "Hello, world!", 20);
-
-prints::
-
-   ┌────────────────────┐
-   │   Hello, world!    │
-   └────────────────────┘
-
-Using type-specific formatting::
-
-   #include <fmt/chrono.h>
-
-   auto t = tm();
-   t.tm_year = 2010 - 1900;
-   t.tm_mon = 7;
-   t.tm_mday = 4;
-   t.tm_hour = 12;
-   t.tm_min = 15;
-   t.tm_sec = 58;
-   fmt::print("{:%Y-%m-%d %H:%M:%S}", t);
-   // Prints: 2010-08-04 12:15:58
-
-Using the comma as a thousands separator::
-
-   #include <fmt/format.h>
-
-   auto s = fmt::format(std::locale("en_US.UTF-8"), "{:L}", 1234567890);
-   // s == "1,234,567,890"
-
-.. ifconfig:: False
-
-   Nesting arguments and more complex examples::
-
-      >>> for align, text in zip('<^>', ['left', 'center', 'right']):
-      ...     '{0:{fill}{align}16}") << text, fill=align, align=align)
-      ...
-      'left<<<<<<<<<<<<'
-      '^^^^^center^^^^^'
-      '>>>>>>>>>>>right'
-      >>>
-      >>> octets = [192, 168, 0, 1]
-      Format("{:02X}{:02X}{:02X}{:02X}") << *octets)
-      'C0A80001'
-      >>> int(_, 16)
-      3232235521
-      >>>
-      >>> width = 5
-      >>> for num in range(5,12):
-      ...     for base in 'dXob':
-      ...         print('{0:{width}{base}}") << num, base=base, width=width), end=' ')
-      ...     print()
-      ...
-          5     5     5   101
-          6     6     6   110
-          7     7     7   111
-          8     8    10  1000
-          9     9    11  1001
-         10     A    12  1010
-         11     B    13  1011
diff --git a/3rdparty/fmt/doc/usage.rst b/3rdparty/fmt/doc/usage.rst
deleted file mode 100644
index f9f81858..00000000
--- a/3rdparty/fmt/doc/usage.rst
+++ /dev/null
@@ -1,212 +0,0 @@
-*****
-Usage
-*****
-
-To use the {fmt} library, add :file:`fmt/core.h`, :file:`fmt/format.h`,
-:file:`fmt/format-inl.h`, :file:`src/format.cc` and optionally other headers
-from a `release archive <https://github.com/fmtlib/fmt/releases/latest>`_ or
-the `Git repository <https://github.com/fmtlib/fmt>`_ to your project.
-Alternatively, you can :ref:`build the library with CMake <building>`.
-
-.. _building:
-
-Building the Library
-====================
-
-The included `CMake build script`__ can be used to build the fmt
-library on a wide range of platforms. CMake is freely available for
-download from https://www.cmake.org/download/.
-
-__ https://github.com/fmtlib/fmt/blob/master/CMakeLists.txt
-
-CMake works by generating native makefiles or project files that can
-be used in the compiler environment of your choice. The typical
-workflow starts with::
-
-  mkdir build          # Create a directory to hold the build output.
-  cd build
-  cmake ..  # Generate native build scripts.
-
-where :file:`{<path/to/fmt>}` is a path to the ``fmt`` repository.
-
-If you are on a \*nix system, you should now see a Makefile in the
-current directory. Now you can build the library by running :command:`make`.
-
-Once the library has been built you can invoke :command:`make test` to run
-the tests.
-
-You can control generation of the make ``test`` target with the ``FMT_TEST``
-CMake option. This can be useful if you include fmt as a subdirectory in
-your project but don't want to add fmt's tests to your ``test`` target.
-
-If you use Windows and have Visual Studio installed, a :file:`FMT.sln`
-file and several :file:`.vcproj` files will be created. You can then build them
-using Visual Studio or msbuild.
-
-On Mac OS X with Xcode installed, an :file:`.xcodeproj` file will be generated.
-
-To build a `shared library`__ set the ``BUILD_SHARED_LIBS`` CMake variable to
-``TRUE``::
-
-  cmake -DBUILD_SHARED_LIBS=TRUE ...
-
-__ https://en.wikipedia.org/wiki/Library_%28computing%29#Shared_libraries
-
-
-To build a `static library` with position independent code (required if the main
-consumer of the fmt library is a shared library i.e. a Python extension) set the
-``CMAKE_POSITION_INDEPENDENT_CODE`` CMake variable to ``TRUE``::
-
-  cmake -DCMAKE_POSITION_INDEPENDENT_CODE=TRUE ...
-
-
-Installing the Library
-======================
-
-After building the library you can install it on a Unix-like system by running
-:command:`sudo make install`.
-
-Usage with CMake
-================
-
-You can add the ``fmt`` library directory into your project and include it in
-your ``CMakeLists.txt`` file::
-
-   add_subdirectory(fmt)
-
-or
-
-::
-
-   add_subdirectory(fmt EXCLUDE_FROM_ALL)
-
-to exclude it from ``make``, ``make all``, or ``cmake --build .``.
-
-You can detect and use an installed version of {fmt} as follows::
-
-   find_package(fmt)
-   target_link_libraries(<your-target> fmt::fmt)
-
-Setting up your target to use a header-only version of ``fmt`` is equally easy::
-
-   target_link_libraries(<your-target> PRIVATE fmt::fmt-header-only)
-
-Usage with build2
-=================
-
-You can use `build2 <https://build2.org>`_, a dependency manager and a
-build-system combined, to use ``fmt``.
-
-Currently this package is available in these package repositories:
-
-- **https://cppget.org/fmt/** for released and published versions.
-- `The git repository with the sources of the build2 package of fmt <https://github.com/build2-packaging/fmt.git>`_
-  for unreleased or custom revisions of ``fmt``.
-
-**Usage:**
-
-- ``build2`` package name: ``fmt``
-- Library target name : ``lib{fmt}``
-
-For example, to make your ``build2`` project depend on ``fmt``:
-
-- Add one of the repositories to your configurations, or in your
-  ``repositories.manifest``, if not already there::
-
-    :
-    role: prerequisite
-    location: https://pkg.cppget.org/1/stable
-
-- Add this package as a dependency to your ``./manifest`` file
-  (example for ``v7.0.x``)::
-
-    depends: fmt ~7.0.0
-
-- Import the target and use it as a prerequisite to your own target
-  using `fmt` in the appropriate ``buildfile``::
-
-    import fmt = fmt%lib{fmt}
-    lib{mylib} : cxx{**} ... $fmt
-
-Then build your project as usual with `b` or `bdep update`.
-
-For ``build2`` newcomers or to get more details and use cases, you can read the
-``build2``
-`toolchain introduction <https://build2.org/build2-toolchain/doc/build2-toolchain-intro.xhtml>`_.
-
-Building the Documentation
-==========================
-
-To build the documentation you need the following software installed on your
-system:
-
-* `Python <https://www.python.org/>`_ with pip and virtualenv
-* `Doxygen <http://www.stack.nl/~dimitri/doxygen/>`_
-* `Less <http://lesscss.org/>`_ with ``less-plugin-clean-css``.
-  Ubuntu doesn't package the ``clean-css`` plugin so you should use ``npm``
-  instead of ``apt`` to install both ``less`` and the plugin::
-
-    sudo npm install -g less less-plugin-clean-css.
-
-First generate makefiles or project files using CMake as described in
-the previous section. Then compile the ``doc`` target/project, for example::
-
-  make doc
-
-This will generate the HTML documentation in ``doc/html``.
-
-Conda
-=====
-
-fmt can be installed on Linux, macOS and Windows with
-`Conda <https://docs.conda.io/en/latest/>`__, using its
-`conda-forge <https://conda-forge.org>`__
-`package <https://github.com/conda-forge/fmt-feedstock>`__, as follows::
-
-  conda install -c conda-forge fmt
-
-Vcpkg
-=====
-
-You can download and install fmt using the `vcpkg
-<https://github.com/Microsoft/vcpkg>`__ dependency manager::
-
-  git clone https://github.com/Microsoft/vcpkg.git
-  cd vcpkg
-  ./bootstrap-vcpkg.sh
-  ./vcpkg integrate install
-  ./vcpkg install fmt
-
-The fmt port in vcpkg is kept up to date by Microsoft team members and community
-contributors. If the version is out of date, please `create an issue or pull
-request <https://github.com/Microsoft/vcpkg>`__ on the vcpkg repository.
-
-LHelper
-=======
-
-You can download and install fmt using
-`lhelper <https://github.com/franko/lhelper>`__ dependency manager::
-
-  lhelper activate <some-environment>
-  lhelper install fmt
-
-All the recipes for lhelper are kept in the
-`lhelper's recipe <https://github.com/franko/lhelper-recipes>`__ repository.
-
-Android NDK
-===========
-
-fmt provides `Android.mk file`__ that can be used to build the library
-with `Android NDK <https://developer.android.com/tools/sdk/ndk/index.html>`_.
-For an example of using fmt with Android NDK, see the
-`android-ndk-example <https://github.com/fmtlib/android-ndk-example>`_
-repository.
-
-__ https://github.com/fmtlib/fmt/blob/master/support/Android.mk
-
-Homebrew
-========
-
-fmt can be installed on OS X using `Homebrew <https://brew.sh/>`_::
-
-  brew install fmt
diff --git a/3rdparty/fmt/include/fmt/args.h b/3rdparty/fmt/include/fmt/args.h
deleted file mode 100644
index 9a8e4ed2..00000000
--- a/3rdparty/fmt/include/fmt/args.h
+++ /dev/null
@@ -1,234 +0,0 @@
-// Formatting library for C++ - dynamic format arguments
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_ARGS_H_
-#define FMT_ARGS_H_
-
-#include <functional>  // std::reference_wrapper
-#include <memory>      // std::unique_ptr
-#include <vector>
-
-#include "core.h"
-
-FMT_BEGIN_NAMESPACE
-
-namespace detail {
-
-template <typename T> struct is_reference_wrapper : std::false_type {};
-template <typename T>
-struct is_reference_wrapper<std::reference_wrapper<T>> : std::true_type {};
-
-template <typename T> const T& unwrap(const T& v) { return v; }
-template <typename T> const T& unwrap(const std::reference_wrapper<T>& v) {
-  return static_cast<const T&>(v);
-}
-
-class dynamic_arg_list {
-  // Workaround for clang's -Wweak-vtables. Unlike for regular classes, for
-  // templates it doesn't complain about inability to deduce single translation
-  // unit for placing vtable. So storage_node_base is made a fake template.
-  template <typename = void> struct node {
-    virtual ~node() = default;
-    std::unique_ptr<node<>> next;
-  };
-
-  template <typename T> struct typed_node : node<> {
-    T value;
-
-    template <typename Arg>
-    FMT_CONSTEXPR typed_node(const Arg& arg) : value(arg) {}
-
-    template <typename Char>
-    FMT_CONSTEXPR typed_node(const basic_string_view<Char>& arg)
-        : value(arg.data(), arg.size()) {}
-  };
-
-  std::unique_ptr<node<>> head_;
-
- public:
-  template <typename T, typename Arg> const T& push(const Arg& arg) {
-    auto new_node = std::unique_ptr<typed_node<T>>(new typed_node<T>(arg));
-    auto& value = new_node->value;
-    new_node->next = std::move(head_);
-    head_ = std::move(new_node);
-    return value;
-  }
-};
-}  // namespace detail
-
-/**
-  \rst
-  A dynamic version of `fmt::format_arg_store`.
-  It's equipped with a storage to potentially temporary objects which lifetimes
-  could be shorter than the format arguments object.
-
-  It can be implicitly converted into `~fmt::basic_format_args` for passing
-  into type-erased formatting functions such as `~fmt::vformat`.
-  \endrst
- */
-template <typename Context>
-class dynamic_format_arg_store
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-    // Workaround a GCC template argument substitution bug.
-    : public basic_format_args<Context>
-#endif
-{
- private:
-  using char_type = typename Context::char_type;
-
-  template <typename T> struct need_copy {
-    static constexpr detail::type mapped_type =
-        detail::mapped_type_constant<T, Context>::value;
-
-    enum {
-      value = !(detail::is_reference_wrapper<T>::value ||
-                std::is_same<T, basic_string_view<char_type>>::value ||
-                std::is_same<T, detail::std_string_view<char_type>>::value ||
-                (mapped_type != detail::type::cstring_type &&
-                 mapped_type != detail::type::string_type &&
-                 mapped_type != detail::type::custom_type))
-    };
-  };
-
-  template <typename T>
-  using stored_type = conditional_t<detail::is_string<T>::value &&
-                                        !has_formatter<T, Context>::value &&
-                                        !detail::is_reference_wrapper<T>::value,
-                                    std::basic_string<char_type>, T>;
-
-  // Storage of basic_format_arg must be contiguous.
-  std::vector<basic_format_arg<Context>> data_;
-  std::vector<detail::named_arg_info<char_type>> named_info_;
-
-  // Storage of arguments not fitting into basic_format_arg must grow
-  // without relocation because items in data_ refer to it.
-  detail::dynamic_arg_list dynamic_args_;
-
-  friend class basic_format_args<Context>;
-
-  unsigned long long get_types() const {
-    return detail::is_unpacked_bit | data_.size() |
-           (named_info_.empty()
-                ? 0ULL
-                : static_cast<unsigned long long>(detail::has_named_args_bit));
-  }
-
-  const basic_format_arg<Context>* data() const {
-    return named_info_.empty() ? data_.data() : data_.data() + 1;
-  }
-
-  template <typename T> void emplace_arg(const T& arg) {
-    data_.emplace_back(detail::make_arg<Context>(arg));
-  }
-
-  template <typename T>
-  void emplace_arg(const detail::named_arg<char_type, T>& arg) {
-    if (named_info_.empty()) {
-      constexpr const detail::named_arg_info<char_type>* zero_ptr{nullptr};
-      data_.insert(data_.begin(), {zero_ptr, 0});
-    }
-    data_.emplace_back(detail::make_arg<Context>(detail::unwrap(arg.value)));
-    auto pop_one = [](std::vector<basic_format_arg<Context>>* data) {
-      data->pop_back();
-    };
-    std::unique_ptr<std::vector<basic_format_arg<Context>>, decltype(pop_one)>
-        guard{&data_, pop_one};
-    named_info_.push_back({arg.name, static_cast<int>(data_.size() - 2u)});
-    data_[0].value_.named_args = {named_info_.data(), named_info_.size()};
-    guard.release();
-  }
-
- public:
-  constexpr dynamic_format_arg_store() = default;
-
-  /**
-    \rst
-    Adds an argument into the dynamic store for later passing to a formatting
-    function.
-
-    Note that custom types and string types (but not string views) are copied
-    into the store dynamically allocating memory if necessary.
-
-    **Example**::
-
-      fmt::dynamic_format_arg_store<fmt::format_context> store;
-      store.push_back(42);
-      store.push_back("abc");
-      store.push_back(1.5f);
-      std::string result = fmt::vformat("{} and {} and {}", store);
-    \endrst
-  */
-  template <typename T> void push_back(const T& arg) {
-    if (detail::const_check(need_copy<T>::value))
-      emplace_arg(dynamic_args_.push<stored_type<T>>(arg));
-    else
-      emplace_arg(detail::unwrap(arg));
-  }
-
-  /**
-    \rst
-    Adds a reference to the argument into the dynamic store for later passing to
-    a formatting function.
-
-    **Example**::
-
-      fmt::dynamic_format_arg_store<fmt::format_context> store;
-      char band[] = "Rolling Stones";
-      store.push_back(std::cref(band));
-      band[9] = 'c'; // Changing str affects the output.
-      std::string result = fmt::vformat("{}", store);
-      // result == "Rolling Scones"
-    \endrst
-  */
-  template <typename T> void push_back(std::reference_wrapper<T> arg) {
-    static_assert(
-        need_copy<T>::value,
-        "objects of built-in types and string views are always copied");
-    emplace_arg(arg.get());
-  }
-
-  /**
-    Adds named argument into the dynamic store for later passing to a formatting
-    function. ``std::reference_wrapper`` is supported to avoid copying of the
-    argument. The name is always copied into the store.
-  */
-  template <typename T>
-  void push_back(const detail::named_arg<char_type, T>& arg) {
-    const char_type* arg_name =
-        dynamic_args_.push<std::basic_string<char_type>>(arg.name).c_str();
-    if (detail::const_check(need_copy<T>::value)) {
-      emplace_arg(
-          fmt::arg(arg_name, dynamic_args_.push<stored_type<T>>(arg.value)));
-    } else {
-      emplace_arg(fmt::arg(arg_name, arg.value));
-    }
-  }
-
-  /** Erase all elements from the store */
-  void clear() {
-    data_.clear();
-    named_info_.clear();
-    dynamic_args_ = detail::dynamic_arg_list();
-  }
-
-  /**
-    \rst
-    Reserves space to store at least *new_cap* arguments including
-    *new_cap_named* named arguments.
-    \endrst
-  */
-  void reserve(size_t new_cap, size_t new_cap_named) {
-    FMT_ASSERT(new_cap >= new_cap_named,
-               "Set of arguments includes set of named arguments");
-    data_.reserve(new_cap);
-    named_info_.reserve(new_cap_named);
-  }
-};
-
-FMT_END_NAMESPACE
-
-#endif  // FMT_ARGS_H_
diff --git a/3rdparty/fmt/include/fmt/chrono.h b/3rdparty/fmt/include/fmt/chrono.h
deleted file mode 100644
index 682efd8d..00000000
--- a/3rdparty/fmt/include/fmt/chrono.h
+++ /dev/null
@@ -1,2067 +0,0 @@
-// Formatting library for C++ - chrono support
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_CHRONO_H_
-#define FMT_CHRONO_H_
-
-#include <algorithm>
-#include <chrono>
-#include <ctime>
-#include <iterator>
-#include <locale>
-#include <ostream>
-#include <type_traits>
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-
-// Enable tzset.
-#ifndef FMT_USE_TZSET
-// UWP doesn't provide _tzset.
-#  if FMT_HAS_INCLUDE("winapifamily.h")
-#    include <winapifamily.h>
-#  endif
-#  if defined(_WIN32) && (!defined(WINAPI_FAMILY) || \
-                          (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
-#    define FMT_USE_TZSET 1
-#  else
-#    define FMT_USE_TZSET 0
-#  endif
-#endif
-
-// Enable safe chrono durations, unless explicitly disabled.
-#ifndef FMT_SAFE_DURATION_CAST
-#  define FMT_SAFE_DURATION_CAST 1
-#endif
-#if FMT_SAFE_DURATION_CAST
-
-// For conversion between std::chrono::durations without undefined
-// behaviour or erroneous results.
-// This is a stripped down version of duration_cast, for inclusion in fmt.
-// See https://github.com/pauldreik/safe_duration_cast
-//
-// Copyright Paul Dreik 2019
-namespace safe_duration_cast {
-
-template <typename To, typename From,
-          FMT_ENABLE_IF(!std::is_same<From, To>::value &&
-                        std::numeric_limits<From>::is_signed ==
-                            std::numeric_limits<To>::is_signed)>
-FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
-  ec = 0;
-  using F = std::numeric_limits<From>;
-  using T = std::numeric_limits<To>;
-  static_assert(F::is_integer, "From must be integral");
-  static_assert(T::is_integer, "To must be integral");
-
-  // A and B are both signed, or both unsigned.
-  if (detail::const_check(F::digits <= T::digits)) {
-    // From fits in To without any problem.
-  } else {
-    // From does not always fit in To, resort to a dynamic check.
-    if (from < (T::min)() || from > (T::max)()) {
-      // outside range.
-      ec = 1;
-      return {};
-    }
-  }
-  return static_cast<To>(from);
-}
-
-/**
- * converts From to To, without loss. If the dynamic value of from
- * can't be converted to To without loss, ec is set.
- */
-template <typename To, typename From,
-          FMT_ENABLE_IF(!std::is_same<From, To>::value &&
-                        std::numeric_limits<From>::is_signed !=
-                            std::numeric_limits<To>::is_signed)>
-FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
-  ec = 0;
-  using F = std::numeric_limits<From>;
-  using T = std::numeric_limits<To>;
-  static_assert(F::is_integer, "From must be integral");
-  static_assert(T::is_integer, "To must be integral");
-
-  if (detail::const_check(F::is_signed && !T::is_signed)) {
-    // From may be negative, not allowed!
-    if (fmt::detail::is_negative(from)) {
-      ec = 1;
-      return {};
-    }
-    // From is positive. Can it always fit in To?
-    if (detail::const_check(F::digits > T::digits) &&
-        from > static_cast<From>(detail::max_value<To>())) {
-      ec = 1;
-      return {};
-    }
-  }
-
-  if (detail::const_check(!F::is_signed && T::is_signed &&
-                          F::digits >= T::digits) &&
-      from > static_cast<From>(detail::max_value<To>())) {
-    ec = 1;
-    return {};
-  }
-  return static_cast<To>(from);  // Lossless conversion.
-}
-
-template <typename To, typename From,
-          FMT_ENABLE_IF(std::is_same<From, To>::value)>
-FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
-  ec = 0;
-  return from;
-}  // function
-
-// clang-format off
-/**
- * converts From to To if possible, otherwise ec is set.
- *
- * input                            |    output
- * ---------------------------------|---------------
- * NaN                              | NaN
- * Inf                              | Inf
- * normal, fits in output           | converted (possibly lossy)
- * normal, does not fit in output   | ec is set
- * subnormal                        | best effort
- * -Inf                             | -Inf
- */
-// clang-format on
-template <typename To, typename From,
-          FMT_ENABLE_IF(!std::is_same<From, To>::value)>
-FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) {
-  ec = 0;
-  using T = std::numeric_limits<To>;
-  static_assert(std::is_floating_point<From>::value, "From must be floating");
-  static_assert(std::is_floating_point<To>::value, "To must be floating");
-
-  // catch the only happy case
-  if (std::isfinite(from)) {
-    if (from >= T::lowest() && from <= (T::max)()) {
-      return static_cast<To>(from);
-    }
-    // not within range.
-    ec = 1;
-    return {};
-  }
-
-  // nan and inf will be preserved
-  return static_cast<To>(from);
-}  // function
-
-template <typename To, typename From,
-          FMT_ENABLE_IF(std::is_same<From, To>::value)>
-FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) {
-  ec = 0;
-  static_assert(std::is_floating_point<From>::value, "From must be floating");
-  return from;
-}
-
-/**
- * safe duration cast between integral durations
- */
-template <typename To, typename FromRep, typename FromPeriod,
-          FMT_ENABLE_IF(std::is_integral<FromRep>::value),
-          FMT_ENABLE_IF(std::is_integral<typename To::rep>::value)>
-To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
-                      int& ec) {
-  using From = std::chrono::duration<FromRep, FromPeriod>;
-  ec = 0;
-  // the basic idea is that we need to convert from count() in the from type
-  // to count() in the To type, by multiplying it with this:
-  struct Factor
-      : std::ratio_divide<typename From::period, typename To::period> {};
-
-  static_assert(Factor::num > 0, "num must be positive");
-  static_assert(Factor::den > 0, "den must be positive");
-
-  // the conversion is like this: multiply from.count() with Factor::num
-  // /Factor::den and convert it to To::rep, all this without
-  // overflow/underflow. let's start by finding a suitable type that can hold
-  // both To, From and Factor::num
-  using IntermediateRep =
-      typename std::common_type<typename From::rep, typename To::rep,
-                                decltype(Factor::num)>::type;
-
-  // safe conversion to IntermediateRep
-  IntermediateRep count =
-      lossless_integral_conversion<IntermediateRep>(from.count(), ec);
-  if (ec) return {};
-  // multiply with Factor::num without overflow or underflow
-  if (detail::const_check(Factor::num != 1)) {
-    const auto max1 = detail::max_value<IntermediateRep>() / Factor::num;
-    if (count > max1) {
-      ec = 1;
-      return {};
-    }
-    const auto min1 =
-        (std::numeric_limits<IntermediateRep>::min)() / Factor::num;
-    if (count < min1) {
-      ec = 1;
-      return {};
-    }
-    count *= Factor::num;
-  }
-
-  if (detail::const_check(Factor::den != 1)) count /= Factor::den;
-  auto tocount = lossless_integral_conversion<typename To::rep>(count, ec);
-  return ec ? To() : To(tocount);
-}
-
-/**
- * safe duration_cast between floating point durations
- */
-template <typename To, typename FromRep, typename FromPeriod,
-          FMT_ENABLE_IF(std::is_floating_point<FromRep>::value),
-          FMT_ENABLE_IF(std::is_floating_point<typename To::rep>::value)>
-To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
-                      int& ec) {
-  using From = std::chrono::duration<FromRep, FromPeriod>;
-  ec = 0;
-  if (std::isnan(from.count())) {
-    // nan in, gives nan out. easy.
-    return To{std::numeric_limits<typename To::rep>::quiet_NaN()};
-  }
-  // maybe we should also check if from is denormal, and decide what to do about
-  // it.
-
-  // +-inf should be preserved.
-  if (std::isinf(from.count())) {
-    return To{from.count()};
-  }
-
-  // the basic idea is that we need to convert from count() in the from type
-  // to count() in the To type, by multiplying it with this:
-  struct Factor
-      : std::ratio_divide<typename From::period, typename To::period> {};
-
-  static_assert(Factor::num > 0, "num must be positive");
-  static_assert(Factor::den > 0, "den must be positive");
-
-  // the conversion is like this: multiply from.count() with Factor::num
-  // /Factor::den and convert it to To::rep, all this without
-  // overflow/underflow. let's start by finding a suitable type that can hold
-  // both To, From and Factor::num
-  using IntermediateRep =
-      typename std::common_type<typename From::rep, typename To::rep,
-                                decltype(Factor::num)>::type;
-
-  // force conversion of From::rep -> IntermediateRep to be safe,
-  // even if it will never happen be narrowing in this context.
-  IntermediateRep count =
-      safe_float_conversion<IntermediateRep>(from.count(), ec);
-  if (ec) {
-    return {};
-  }
-
-  // multiply with Factor::num without overflow or underflow
-  if (detail::const_check(Factor::num != 1)) {
-    constexpr auto max1 = detail::max_value<IntermediateRep>() /
-                          static_cast<IntermediateRep>(Factor::num);
-    if (count > max1) {
-      ec = 1;
-      return {};
-    }
-    constexpr auto min1 = std::numeric_limits<IntermediateRep>::lowest() /
-                          static_cast<IntermediateRep>(Factor::num);
-    if (count < min1) {
-      ec = 1;
-      return {};
-    }
-    count *= static_cast<IntermediateRep>(Factor::num);
-  }
-
-  // this can't go wrong, right? den>0 is checked earlier.
-  if (detail::const_check(Factor::den != 1)) {
-    using common_t = typename std::common_type<IntermediateRep, intmax_t>::type;
-    count /= static_cast<common_t>(Factor::den);
-  }
-
-  // convert to the to type, safely
-  using ToRep = typename To::rep;
-
-  const ToRep tocount = safe_float_conversion<ToRep>(count, ec);
-  if (ec) {
-    return {};
-  }
-  return To{tocount};
-}
-}  // namespace safe_duration_cast
-#endif
-
-// Prevents expansion of a preceding token as a function-style macro.
-// Usage: f FMT_NOMACRO()
-#define FMT_NOMACRO
-
-namespace detail {
-template <typename T = void> struct null {};
-inline null<> localtime_r FMT_NOMACRO(...) { return null<>(); }
-inline null<> localtime_s(...) { return null<>(); }
-inline null<> gmtime_r(...) { return null<>(); }
-inline null<> gmtime_s(...) { return null<>(); }
-
-inline const std::locale& get_classic_locale() {
-  static const auto& locale = std::locale::classic();
-  return locale;
-}
-
-template <typename CodeUnit> struct codecvt_result {
-  static constexpr const size_t max_size = 32;
-  CodeUnit buf[max_size];
-  CodeUnit* end;
-};
-template <typename CodeUnit>
-constexpr const size_t codecvt_result<CodeUnit>::max_size;
-
-template <typename CodeUnit>
-void write_codecvt(codecvt_result<CodeUnit>& out, string_view in_buf,
-                   const std::locale& loc) {
-  using codecvt = std::codecvt<CodeUnit, char, std::mbstate_t>;
-#if FMT_CLANG_VERSION
-#  pragma clang diagnostic push
-#  pragma clang diagnostic ignored "-Wdeprecated"
-  auto& f = std::use_facet<codecvt>(loc);
-#  pragma clang diagnostic pop
-#else
-  auto& f = std::use_facet<codecvt>(loc);
-#endif
-  auto mb = std::mbstate_t();
-  const char* from_next = nullptr;
-  auto result = f.in(mb, in_buf.begin(), in_buf.end(), from_next,
-                     std::begin(out.buf), std::end(out.buf), out.end);
-  if (result != std::codecvt_base::ok)
-    FMT_THROW(format_error("failed to format time"));
-}
-
-template <typename OutputIt>
-auto write_encoded_tm_str(OutputIt out, string_view in, const std::locale& loc)
-    -> OutputIt {
-  if (detail::is_utf8() && loc != get_classic_locale()) {
-    // char16_t and char32_t codecvts are broken in MSVC (linkage errors) and
-    // gcc-4.
-#if FMT_MSC_VER != 0 || \
-    (defined(__GLIBCXX__) && !defined(_GLIBCXX_USE_DUAL_ABI))
-    // The _GLIBCXX_USE_DUAL_ABI macro is always defined in libstdc++ from gcc-5
-    // and newer.
-    using code_unit = wchar_t;
-#else
-    using code_unit = char32_t;
-#endif
-
-    using unit_t = codecvt_result<code_unit>;
-    unit_t unit;
-    write_codecvt(unit, in, loc);
-    // In UTF-8 is used one to four one-byte code units.
-    auto&& buf = basic_memory_buffer<char, unit_t::max_size * 4>();
-    for (code_unit* p = unit.buf; p != unit.end; ++p) {
-      uint32_t c = static_cast<uint32_t>(*p);
-      if (sizeof(code_unit) == 2 && c >= 0xd800 && c <= 0xdfff) {
-        // surrogate pair
-        ++p;
-        if (p == unit.end || (c & 0xfc00) != 0xd800 ||
-            (*p & 0xfc00) != 0xdc00) {
-          FMT_THROW(format_error("failed to format time"));
-        }
-        c = (c << 10) + static_cast<uint32_t>(*p) - 0x35fdc00;
-      }
-      if (c < 0x80) {
-        buf.push_back(static_cast<char>(c));
-      } else if (c < 0x800) {
-        buf.push_back(static_cast<char>(0xc0 | (c >> 6)));
-        buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
-      } else if ((c >= 0x800 && c <= 0xd7ff) || (c >= 0xe000 && c <= 0xffff)) {
-        buf.push_back(static_cast<char>(0xe0 | (c >> 12)));
-        buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
-        buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
-      } else if (c >= 0x10000 && c <= 0x10ffff) {
-        buf.push_back(static_cast<char>(0xf0 | (c >> 18)));
-        buf.push_back(static_cast<char>(0x80 | ((c & 0x3ffff) >> 12)));
-        buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
-        buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
-      } else {
-        FMT_THROW(format_error("failed to format time"));
-      }
-    }
-    return copy_str<char>(buf.data(), buf.data() + buf.size(), out);
-  }
-  return copy_str<char>(in.data(), in.data() + in.size(), out);
-}
-
-template <typename Char, typename OutputIt,
-          FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
-auto write_tm_str(OutputIt out, string_view sv, const std::locale& loc)
-    -> OutputIt {
-  codecvt_result<Char> unit;
-  write_codecvt(unit, sv, loc);
-  return copy_str<Char>(unit.buf, unit.end, out);
-}
-
-template <typename Char, typename OutputIt,
-          FMT_ENABLE_IF(std::is_same<Char, char>::value)>
-auto write_tm_str(OutputIt out, string_view sv, const std::locale& loc)
-    -> OutputIt {
-  return write_encoded_tm_str(out, sv, loc);
-}
-
-template <typename Char>
-inline void do_write(buffer<Char>& buf, const std::tm& time,
-                     const std::locale& loc, char format, char modifier) {
-  auto&& format_buf = formatbuf<std::basic_streambuf<Char>>(buf);
-  auto&& os = std::basic_ostream<Char>(&format_buf);
-  os.imbue(loc);
-  using iterator = std::ostreambuf_iterator<Char>;
-  const auto& facet = std::use_facet<std::time_put<Char, iterator>>(loc);
-  auto end = facet.put(os, os, Char(' '), &time, format, modifier);
-  if (end.failed()) FMT_THROW(format_error("failed to format time"));
-}
-
-template <typename Char, typename OutputIt,
-          FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
-auto write(OutputIt out, const std::tm& time, const std::locale& loc,
-           char format, char modifier = 0) -> OutputIt {
-  auto&& buf = get_buffer<Char>(out);
-  do_write<Char>(buf, time, loc, format, modifier);
-  return buf.out();
-}
-
-template <typename Char, typename OutputIt,
-          FMT_ENABLE_IF(std::is_same<Char, char>::value)>
-auto write(OutputIt out, const std::tm& time, const std::locale& loc,
-           char format, char modifier = 0) -> OutputIt {
-  auto&& buf = basic_memory_buffer<Char>();
-  do_write<char>(buf, time, loc, format, modifier);
-  return write_encoded_tm_str(out, string_view(buf.data(), buf.size()), loc);
-}
-
-}  // namespace detail
-
-FMT_MODULE_EXPORT_BEGIN
-
-/**
-  Converts given time since epoch as ``std::time_t`` value into calendar time,
-  expressed in local time. Unlike ``std::localtime``, this function is
-  thread-safe on most platforms.
- */
-inline std::tm localtime(std::time_t time) {
-  struct dispatcher {
-    std::time_t time_;
-    std::tm tm_;
-
-    dispatcher(std::time_t t) : time_(t) {}
-
-    bool run() {
-      using namespace fmt::detail;
-      return handle(localtime_r(&time_, &tm_));
-    }
-
-    bool handle(std::tm* tm) { return tm != nullptr; }
-
-    bool handle(detail::null<>) {
-      using namespace fmt::detail;
-      return fallback(localtime_s(&tm_, &time_));
-    }
-
-    bool fallback(int res) { return res == 0; }
-
-#if !FMT_MSC_VER
-    bool fallback(detail::null<>) {
-      using namespace fmt::detail;
-      std::tm* tm = std::localtime(&time_);
-      if (tm) tm_ = *tm;
-      return tm != nullptr;
-    }
-#endif
-  };
-  dispatcher lt(time);
-  // Too big time values may be unsupported.
-  if (!lt.run()) FMT_THROW(format_error("time_t value out of range"));
-  return lt.tm_;
-}
-
-inline std::tm localtime(
-    std::chrono::time_point<std::chrono::system_clock> time_point) {
-  return localtime(std::chrono::system_clock::to_time_t(time_point));
-}
-
-/**
-  Converts given time since epoch as ``std::time_t`` value into calendar time,
-  expressed in Coordinated Universal Time (UTC). Unlike ``std::gmtime``, this
-  function is thread-safe on most platforms.
- */
-inline std::tm gmtime(std::time_t time) {
-  struct dispatcher {
-    std::time_t time_;
-    std::tm tm_;
-
-    dispatcher(std::time_t t) : time_(t) {}
-
-    bool run() {
-      using namespace fmt::detail;
-      return handle(gmtime_r(&time_, &tm_));
-    }
-
-    bool handle(std::tm* tm) { return tm != nullptr; }
-
-    bool handle(detail::null<>) {
-      using namespace fmt::detail;
-      return fallback(gmtime_s(&tm_, &time_));
-    }
-
-    bool fallback(int res) { return res == 0; }
-
-#if !FMT_MSC_VER
-    bool fallback(detail::null<>) {
-      std::tm* tm = std::gmtime(&time_);
-      if (tm) tm_ = *tm;
-      return tm != nullptr;
-    }
-#endif
-  };
-  dispatcher gt(time);
-  // Too big time values may be unsupported.
-  if (!gt.run()) FMT_THROW(format_error("time_t value out of range"));
-  return gt.tm_;
-}
-
-inline std::tm gmtime(
-    std::chrono::time_point<std::chrono::system_clock> time_point) {
-  return gmtime(std::chrono::system_clock::to_time_t(time_point));
-}
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
-// Writes two-digit numbers a, b and c separated by sep to buf.
-// The method by Pavel Novikov based on
-// https://johnnylee-sde.github.io/Fast-unsigned-integer-to-time-string/.
-inline void write_digit2_separated(char* buf, unsigned a, unsigned b,
-                                   unsigned c, char sep) {
-  unsigned long long digits =
-      a | (b << 24) | (static_cast<unsigned long long>(c) << 48);
-  // Convert each value to BCD.
-  // We have x = a * 10 + b and we want to convert it to BCD y = a * 16 + b.
-  // The difference is
-  //   y - x = a * 6
-  // a can be found from x:
-  //   a = floor(x / 10)
-  // then
-  //   y = x + a * 6 = x + floor(x / 10) * 6
-  // floor(x / 10) is (x * 205) >> 11 (needs 16 bits).
-  digits += (((digits * 205) >> 11) & 0x000f00000f00000f) * 6;
-  // Put low nibbles to high bytes and high nibbles to low bytes.
-  digits = ((digits & 0x00f00000f00000f0) >> 4) |
-           ((digits & 0x000f00000f00000f) << 8);
-  auto usep = static_cast<unsigned long long>(sep);
-  // Add ASCII '0' to each digit byte and insert separators.
-  digits |= 0x3030003030003030 | (usep << 16) | (usep << 40);
-
-  constexpr const size_t len = 8;
-  if (const_check(is_big_endian())) {
-    char tmp[len];
-    memcpy(tmp, &digits, len);
-    std::reverse_copy(tmp, tmp + len, buf);
-  } else {
-    memcpy(buf, &digits, len);
-  }
-}
-
-template <typename Period> FMT_CONSTEXPR inline const char* get_units() {
-  if (std::is_same<Period, std::atto>::value) return "as";
-  if (std::is_same<Period, std::femto>::value) return "fs";
-  if (std::is_same<Period, std::pico>::value) return "ps";
-  if (std::is_same<Period, std::nano>::value) return "ns";
-  if (std::is_same<Period, std::micro>::value) return "µs";
-  if (std::is_same<Period, std::milli>::value) return "ms";
-  if (std::is_same<Period, std::centi>::value) return "cs";
-  if (std::is_same<Period, std::deci>::value) return "ds";
-  if (std::is_same<Period, std::ratio<1>>::value) return "s";
-  if (std::is_same<Period, std::deca>::value) return "das";
-  if (std::is_same<Period, std::hecto>::value) return "hs";
-  if (std::is_same<Period, std::kilo>::value) return "ks";
-  if (std::is_same<Period, std::mega>::value) return "Ms";
-  if (std::is_same<Period, std::giga>::value) return "Gs";
-  if (std::is_same<Period, std::tera>::value) return "Ts";
-  if (std::is_same<Period, std::peta>::value) return "Ps";
-  if (std::is_same<Period, std::exa>::value) return "Es";
-  if (std::is_same<Period, std::ratio<60>>::value) return "m";
-  if (std::is_same<Period, std::ratio<3600>>::value) return "h";
-  return nullptr;
-}
-
-enum class numeric_system {
-  standard,
-  // Alternative numeric system, e.g. 十二 instead of 12 in ja_JP locale.
-  alternative
-};
-
-// Parses a put_time-like format string and invokes handler actions.
-template <typename Char, typename Handler>
-FMT_CONSTEXPR const Char* parse_chrono_format(const Char* begin,
-                                              const Char* end,
-                                              Handler&& handler) {
-  auto ptr = begin;
-  while (ptr != end) {
-    auto c = *ptr;
-    if (c == '}') break;
-    if (c != '%') {
-      ++ptr;
-      continue;
-    }
-    if (begin != ptr) handler.on_text(begin, ptr);
-    ++ptr;  // consume '%'
-    if (ptr == end) FMT_THROW(format_error("invalid format"));
-    c = *ptr++;
-    switch (c) {
-    case '%':
-      handler.on_text(ptr - 1, ptr);
-      break;
-    case 'n': {
-      const Char newline[] = {'\n'};
-      handler.on_text(newline, newline + 1);
-      break;
-    }
-    case 't': {
-      const Char tab[] = {'\t'};
-      handler.on_text(tab, tab + 1);
-      break;
-    }
-    // Year:
-    case 'Y':
-      handler.on_year(numeric_system::standard);
-      break;
-    case 'y':
-      handler.on_short_year(numeric_system::standard);
-      break;
-    case 'C':
-      handler.on_century(numeric_system::standard);
-      break;
-    case 'G':
-      handler.on_iso_week_based_year();
-      break;
-    case 'g':
-      handler.on_iso_week_based_short_year();
-      break;
-    // Day of the week:
-    case 'a':
-      handler.on_abbr_weekday();
-      break;
-    case 'A':
-      handler.on_full_weekday();
-      break;
-    case 'w':
-      handler.on_dec0_weekday(numeric_system::standard);
-      break;
-    case 'u':
-      handler.on_dec1_weekday(numeric_system::standard);
-      break;
-    // Month:
-    case 'b':
-    case 'h':
-      handler.on_abbr_month();
-      break;
-    case 'B':
-      handler.on_full_month();
-      break;
-    case 'm':
-      handler.on_dec_month(numeric_system::standard);
-      break;
-    // Day of the year/month:
-    case 'U':
-      handler.on_dec0_week_of_year(numeric_system::standard);
-      break;
-    case 'W':
-      handler.on_dec1_week_of_year(numeric_system::standard);
-      break;
-    case 'V':
-      handler.on_iso_week_of_year(numeric_system::standard);
-      break;
-    case 'j':
-      handler.on_day_of_year();
-      break;
-    case 'd':
-      handler.on_day_of_month(numeric_system::standard);
-      break;
-    case 'e':
-      handler.on_day_of_month_space(numeric_system::standard);
-      break;
-    // Hour, minute, second:
-    case 'H':
-      handler.on_24_hour(numeric_system::standard);
-      break;
-    case 'I':
-      handler.on_12_hour(numeric_system::standard);
-      break;
-    case 'M':
-      handler.on_minute(numeric_system::standard);
-      break;
-    case 'S':
-      handler.on_second(numeric_system::standard);
-      break;
-    // Other:
-    case 'c':
-      handler.on_datetime(numeric_system::standard);
-      break;
-    case 'x':
-      handler.on_loc_date(numeric_system::standard);
-      break;
-    case 'X':
-      handler.on_loc_time(numeric_system::standard);
-      break;
-    case 'D':
-      handler.on_us_date();
-      break;
-    case 'F':
-      handler.on_iso_date();
-      break;
-    case 'r':
-      handler.on_12_hour_time();
-      break;
-    case 'R':
-      handler.on_24_hour_time();
-      break;
-    case 'T':
-      handler.on_iso_time();
-      break;
-    case 'p':
-      handler.on_am_pm();
-      break;
-    case 'Q':
-      handler.on_duration_value();
-      break;
-    case 'q':
-      handler.on_duration_unit();
-      break;
-    case 'z':
-      handler.on_utc_offset();
-      break;
-    case 'Z':
-      handler.on_tz_name();
-      break;
-    // Alternative representation:
-    case 'E': {
-      if (ptr == end) FMT_THROW(format_error("invalid format"));
-      c = *ptr++;
-      switch (c) {
-      case 'Y':
-        handler.on_year(numeric_system::alternative);
-        break;
-      case 'y':
-        handler.on_offset_year();
-        break;
-      case 'C':
-        handler.on_century(numeric_system::alternative);
-        break;
-      case 'c':
-        handler.on_datetime(numeric_system::alternative);
-        break;
-      case 'x':
-        handler.on_loc_date(numeric_system::alternative);
-        break;
-      case 'X':
-        handler.on_loc_time(numeric_system::alternative);
-        break;
-      default:
-        FMT_THROW(format_error("invalid format"));
-      }
-      break;
-    }
-    case 'O':
-      if (ptr == end) FMT_THROW(format_error("invalid format"));
-      c = *ptr++;
-      switch (c) {
-      case 'y':
-        handler.on_short_year(numeric_system::alternative);
-        break;
-      case 'm':
-        handler.on_dec_month(numeric_system::alternative);
-        break;
-      case 'U':
-        handler.on_dec0_week_of_year(numeric_system::alternative);
-        break;
-      case 'W':
-        handler.on_dec1_week_of_year(numeric_system::alternative);
-        break;
-      case 'V':
-        handler.on_iso_week_of_year(numeric_system::alternative);
-        break;
-      case 'd':
-        handler.on_day_of_month(numeric_system::alternative);
-        break;
-      case 'e':
-        handler.on_day_of_month_space(numeric_system::alternative);
-        break;
-      case 'w':
-        handler.on_dec0_weekday(numeric_system::alternative);
-        break;
-      case 'u':
-        handler.on_dec1_weekday(numeric_system::alternative);
-        break;
-      case 'H':
-        handler.on_24_hour(numeric_system::alternative);
-        break;
-      case 'I':
-        handler.on_12_hour(numeric_system::alternative);
-        break;
-      case 'M':
-        handler.on_minute(numeric_system::alternative);
-        break;
-      case 'S':
-        handler.on_second(numeric_system::alternative);
-        break;
-      default:
-        FMT_THROW(format_error("invalid format"));
-      }
-      break;
-    default:
-      FMT_THROW(format_error("invalid format"));
-    }
-    begin = ptr;
-  }
-  if (begin != ptr) handler.on_text(begin, ptr);
-  return ptr;
-}
-
-template <typename Derived> struct null_chrono_spec_handler {
-  FMT_CONSTEXPR void unsupported() {
-    static_cast<Derived*>(this)->unsupported();
-  }
-  FMT_CONSTEXPR void on_year(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_short_year(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_offset_year() { unsupported(); }
-  FMT_CONSTEXPR void on_century(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_iso_week_based_year() { unsupported(); }
-  FMT_CONSTEXPR void on_iso_week_based_short_year() { unsupported(); }
-  FMT_CONSTEXPR void on_abbr_weekday() { unsupported(); }
-  FMT_CONSTEXPR void on_full_weekday() { unsupported(); }
-  FMT_CONSTEXPR void on_dec0_weekday(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_dec1_weekday(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_abbr_month() { unsupported(); }
-  FMT_CONSTEXPR void on_full_month() { unsupported(); }
-  FMT_CONSTEXPR void on_dec_month(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_dec0_week_of_year(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_dec1_week_of_year(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_iso_week_of_year(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_day_of_year() { unsupported(); }
-  FMT_CONSTEXPR void on_day_of_month(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_day_of_month_space(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_24_hour(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_12_hour(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_minute(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_second(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_datetime(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_loc_date(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_loc_time(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_us_date() { unsupported(); }
-  FMT_CONSTEXPR void on_iso_date() { unsupported(); }
-  FMT_CONSTEXPR void on_12_hour_time() { unsupported(); }
-  FMT_CONSTEXPR void on_24_hour_time() { unsupported(); }
-  FMT_CONSTEXPR void on_iso_time() { unsupported(); }
-  FMT_CONSTEXPR void on_am_pm() { unsupported(); }
-  FMT_CONSTEXPR void on_duration_value() { unsupported(); }
-  FMT_CONSTEXPR void on_duration_unit() { unsupported(); }
-  FMT_CONSTEXPR void on_utc_offset() { unsupported(); }
-  FMT_CONSTEXPR void on_tz_name() { unsupported(); }
-};
-
-struct tm_format_checker : null_chrono_spec_handler<tm_format_checker> {
-  FMT_NORETURN void unsupported() { FMT_THROW(format_error("no format")); }
-
-  template <typename Char>
-  FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
-  FMT_CONSTEXPR void on_year(numeric_system) {}
-  FMT_CONSTEXPR void on_short_year(numeric_system) {}
-  FMT_CONSTEXPR void on_offset_year() {}
-  FMT_CONSTEXPR void on_century(numeric_system) {}
-  FMT_CONSTEXPR void on_iso_week_based_year() {}
-  FMT_CONSTEXPR void on_iso_week_based_short_year() {}
-  FMT_CONSTEXPR void on_abbr_weekday() {}
-  FMT_CONSTEXPR void on_full_weekday() {}
-  FMT_CONSTEXPR void on_dec0_weekday(numeric_system) {}
-  FMT_CONSTEXPR void on_dec1_weekday(numeric_system) {}
-  FMT_CONSTEXPR void on_abbr_month() {}
-  FMT_CONSTEXPR void on_full_month() {}
-  FMT_CONSTEXPR void on_dec_month(numeric_system) {}
-  FMT_CONSTEXPR void on_dec0_week_of_year(numeric_system) {}
-  FMT_CONSTEXPR void on_dec1_week_of_year(numeric_system) {}
-  FMT_CONSTEXPR void on_iso_week_of_year(numeric_system) {}
-  FMT_CONSTEXPR void on_day_of_year() {}
-  FMT_CONSTEXPR void on_day_of_month(numeric_system) {}
-  FMT_CONSTEXPR void on_day_of_month_space(numeric_system) {}
-  FMT_CONSTEXPR void on_24_hour(numeric_system) {}
-  FMT_CONSTEXPR void on_12_hour(numeric_system) {}
-  FMT_CONSTEXPR void on_minute(numeric_system) {}
-  FMT_CONSTEXPR void on_second(numeric_system) {}
-  FMT_CONSTEXPR void on_datetime(numeric_system) {}
-  FMT_CONSTEXPR void on_loc_date(numeric_system) {}
-  FMT_CONSTEXPR void on_loc_time(numeric_system) {}
-  FMT_CONSTEXPR void on_us_date() {}
-  FMT_CONSTEXPR void on_iso_date() {}
-  FMT_CONSTEXPR void on_12_hour_time() {}
-  FMT_CONSTEXPR void on_24_hour_time() {}
-  FMT_CONSTEXPR void on_iso_time() {}
-  FMT_CONSTEXPR void on_am_pm() {}
-  FMT_CONSTEXPR void on_utc_offset() {}
-  FMT_CONSTEXPR void on_tz_name() {}
-};
-
-inline const char* tm_wday_full_name(int wday) {
-  static constexpr const char* full_name_list[] = {
-      "Sunday",   "Monday", "Tuesday", "Wednesday",
-      "Thursday", "Friday", "Saturday"};
-  return wday >= 0 && wday <= 6 ? full_name_list[wday] : "?";
-}
-inline const char* tm_wday_short_name(int wday) {
-  static constexpr const char* short_name_list[] = {"Sun", "Mon", "Tue", "Wed",
-                                                    "Thu", "Fri", "Sat"};
-  return wday >= 0 && wday <= 6 ? short_name_list[wday] : "???";
-}
-
-inline const char* tm_mon_full_name(int mon) {
-  static constexpr const char* full_name_list[] = {
-      "January", "February", "March",     "April",   "May",      "June",
-      "July",    "August",   "September", "October", "November", "December"};
-  return mon >= 0 && mon <= 11 ? full_name_list[mon] : "?";
-}
-inline const char* tm_mon_short_name(int mon) {
-  static constexpr const char* short_name_list[] = {
-      "Jan", "Feb", "Mar", "Apr", "May", "Jun",
-      "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
-  };
-  return mon >= 0 && mon <= 11 ? short_name_list[mon] : "???";
-}
-
-template <typename T, typename = void>
-struct has_member_data_tm_gmtoff : std::false_type {};
-template <typename T>
-struct has_member_data_tm_gmtoff<T, void_t<decltype(T::tm_gmtoff)>>
-    : std::true_type {};
-
-template <typename T, typename = void>
-struct has_member_data_tm_zone : std::false_type {};
-template <typename T>
-struct has_member_data_tm_zone<T, void_t<decltype(T::tm_zone)>>
-    : std::true_type {};
-
-#if FMT_USE_TZSET
-inline void tzset_once() {
-  static bool init = []() -> bool {
-    _tzset();
-    return true;
-  }();
-  ignore_unused(init);
-}
-#endif
-
-template <typename OutputIt, typename Char> class tm_writer {
- private:
-  static constexpr int days_per_week = 7;
-
-  const std::locale& loc_;
-  const bool is_classic_;
-  OutputIt out_;
-  const std::tm& tm_;
-
-  auto tm_sec() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_sec >= 0 && tm_.tm_sec <= 61, "");
-    return tm_.tm_sec;
-  }
-  auto tm_min() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_min >= 0 && tm_.tm_min <= 59, "");
-    return tm_.tm_min;
-  }
-  auto tm_hour() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_hour >= 0 && tm_.tm_hour <= 23, "");
-    return tm_.tm_hour;
-  }
-  auto tm_mday() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_mday >= 1 && tm_.tm_mday <= 31, "");
-    return tm_.tm_mday;
-  }
-  auto tm_mon() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_mon >= 0 && tm_.tm_mon <= 11, "");
-    return tm_.tm_mon;
-  }
-  auto tm_year() const noexcept -> long long { return 1900ll + tm_.tm_year; }
-  auto tm_wday() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_wday >= 0 && tm_.tm_wday <= 6, "");
-    return tm_.tm_wday;
-  }
-  auto tm_yday() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_yday >= 0 && tm_.tm_yday <= 365, "");
-    return tm_.tm_yday;
-  }
-
-  auto tm_hour12() const noexcept -> int {
-    const auto h = tm_hour();
-    const auto z = h < 12 ? h : h - 12;
-    return z == 0 ? 12 : z;
-  }
-
-  // POSIX and the C Standard are unclear or inconsistent about what %C and %y
-  // do if the year is negative or exceeds 9999. Use the convention that %C
-  // concatenated with %y yields the same output as %Y, and that %Y contains at
-  // least 4 characters, with more only if necessary.
-  auto split_year_lower(long long year) const noexcept -> int {
-    auto l = year % 100;
-    if (l < 0) l = -l;  // l in [0, 99]
-    return static_cast<int>(l);
-  }
-
-  // Algorithm:
-  // https://en.wikipedia.org/wiki/ISO_week_date#Calculating_the_week_number_from_a_month_and_day_of_the_month_or_ordinal_date
-  auto iso_year_weeks(long long curr_year) const noexcept -> int {
-    const auto prev_year = curr_year - 1;
-    const auto curr_p =
-        (curr_year + curr_year / 4 - curr_year / 100 + curr_year / 400) %
-        days_per_week;
-    const auto prev_p =
-        (prev_year + prev_year / 4 - prev_year / 100 + prev_year / 400) %
-        days_per_week;
-    return 52 + ((curr_p == 4 || prev_p == 3) ? 1 : 0);
-  }
-  auto iso_week_num(int tm_yday, int tm_wday) const noexcept -> int {
-    return (tm_yday + 11 - (tm_wday == 0 ? days_per_week : tm_wday)) /
-           days_per_week;
-  }
-  auto tm_iso_week_year() const noexcept -> long long {
-    const auto year = tm_year();
-    const auto w = iso_week_num(tm_yday(), tm_wday());
-    if (w < 1) return year - 1;
-    if (w > iso_year_weeks(year)) return year + 1;
-    return year;
-  }
-  auto tm_iso_week_of_year() const noexcept -> int {
-    const auto year = tm_year();
-    const auto w = iso_week_num(tm_yday(), tm_wday());
-    if (w < 1) return iso_year_weeks(year - 1);
-    if (w > iso_year_weeks(year)) return 1;
-    return w;
-  }
-
-  void write1(int value) {
-    *out_++ = static_cast<char>('0' + to_unsigned(value) % 10);
-  }
-  void write2(int value) {
-    const char* d = digits2(to_unsigned(value) % 100);
-    *out_++ = *d++;
-    *out_++ = *d;
-  }
-
-  void write_year_extended(long long year) {
-    // At least 4 characters.
-    int width = 4;
-    if (year < 0) {
-      *out_++ = '-';
-      year = 0 - year;
-      --width;
-    }
-    uint32_or_64_or_128_t<long long> n = to_unsigned(year);
-    const int num_digits = count_digits(n);
-    if (width > num_digits) out_ = std::fill_n(out_, width - num_digits, '0');
-    out_ = format_decimal<Char>(out_, n, num_digits).end;
-  }
-  void write_year(long long year) {
-    if (year >= 0 && year < 10000) {
-      write2(static_cast<int>(year / 100));
-      write2(static_cast<int>(year % 100));
-    } else {
-      write_year_extended(year);
-    }
-  }
-
-  void write_utc_offset(long offset) {
-    if (offset < 0) {
-      *out_++ = '-';
-      offset = -offset;
-    } else {
-      *out_++ = '+';
-    }
-    offset /= 60;
-    write2(static_cast<int>(offset / 60));
-    write2(static_cast<int>(offset % 60));
-  }
-  template <typename T, FMT_ENABLE_IF(has_member_data_tm_gmtoff<T>::value)>
-  void format_utc_offset_impl(const T& tm) {
-    write_utc_offset(tm.tm_gmtoff);
-  }
-  template <typename T, FMT_ENABLE_IF(!has_member_data_tm_gmtoff<T>::value)>
-  void format_utc_offset_impl(const T& tm) {
-#if defined(_WIN32) && defined(_UCRT)
-#  if FMT_USE_TZSET
-    tzset_once();
-#  endif
-    long offset = 0;
-    _get_timezone(&offset);
-    if (tm.tm_isdst) {
-      long dstbias = 0;
-      _get_dstbias(&dstbias);
-      offset += dstbias;
-    }
-    write_utc_offset(-offset);
-#else
-    ignore_unused(tm);
-    format_localized('z');
-#endif
-  }
-
-  template <typename T, FMT_ENABLE_IF(has_member_data_tm_zone<T>::value)>
-  void format_tz_name_impl(const T& tm) {
-    if (is_classic_)
-      out_ = write_tm_str<Char>(out_, tm.tm_zone, loc_);
-    else
-      format_localized('Z');
-  }
-  template <typename T, FMT_ENABLE_IF(!has_member_data_tm_zone<T>::value)>
-  void format_tz_name_impl(const T&) {
-    format_localized('Z');
-  }
-
-  void format_localized(char format, char modifier = 0) {
-    out_ = write<Char>(out_, tm_, loc_, format, modifier);
-  }
-
- public:
-  tm_writer(const std::locale& loc, OutputIt out, const std::tm& tm)
-      : loc_(loc),
-        is_classic_(loc_ == get_classic_locale()),
-        out_(out),
-        tm_(tm) {}
-
-  OutputIt out() const { return out_; }
-
-  FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) {
-    out_ = copy_str<Char>(begin, end, out_);
-  }
-
-  void on_abbr_weekday() {
-    if (is_classic_)
-      out_ = write(out_, tm_wday_short_name(tm_wday()));
-    else
-      format_localized('a');
-  }
-  void on_full_weekday() {
-    if (is_classic_)
-      out_ = write(out_, tm_wday_full_name(tm_wday()));
-    else
-      format_localized('A');
-  }
-  void on_dec0_weekday(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) return write1(tm_wday());
-    format_localized('w', 'O');
-  }
-  void on_dec1_weekday(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) {
-      auto wday = tm_wday();
-      write1(wday == 0 ? days_per_week : wday);
-    } else {
-      format_localized('u', 'O');
-    }
-  }
-
-  void on_abbr_month() {
-    if (is_classic_)
-      out_ = write(out_, tm_mon_short_name(tm_mon()));
-    else
-      format_localized('b');
-  }
-  void on_full_month() {
-    if (is_classic_)
-      out_ = write(out_, tm_mon_full_name(tm_mon()));
-    else
-      format_localized('B');
-  }
-
-  void on_datetime(numeric_system ns) {
-    if (is_classic_) {
-      on_abbr_weekday();
-      *out_++ = ' ';
-      on_abbr_month();
-      *out_++ = ' ';
-      on_day_of_month_space(numeric_system::standard);
-      *out_++ = ' ';
-      on_iso_time();
-      *out_++ = ' ';
-      on_year(numeric_system::standard);
-    } else {
-      format_localized('c', ns == numeric_system::standard ? '\0' : 'E');
-    }
-  }
-  void on_loc_date(numeric_system ns) {
-    if (is_classic_)
-      on_us_date();
-    else
-      format_localized('x', ns == numeric_system::standard ? '\0' : 'E');
-  }
-  void on_loc_time(numeric_system ns) {
-    if (is_classic_)
-      on_iso_time();
-    else
-      format_localized('X', ns == numeric_system::standard ? '\0' : 'E');
-  }
-  void on_us_date() {
-    char buf[8];
-    write_digit2_separated(buf, to_unsigned(tm_mon() + 1),
-                           to_unsigned(tm_mday()),
-                           to_unsigned(split_year_lower(tm_year())), '/');
-    out_ = copy_str<Char>(std::begin(buf), std::end(buf), out_);
-  }
-  void on_iso_date() {
-    auto year = tm_year();
-    char buf[10];
-    size_t offset = 0;
-    if (year >= 0 && year < 10000) {
-      copy2(buf, digits2(to_unsigned(year / 100)));
-    } else {
-      offset = 4;
-      write_year_extended(year);
-      year = 0;
-    }
-    write_digit2_separated(buf + 2, static_cast<unsigned>(year % 100),
-                           to_unsigned(tm_mon() + 1), to_unsigned(tm_mday()),
-                           '-');
-    out_ = copy_str<Char>(std::begin(buf) + offset, std::end(buf), out_);
-  }
-
-  void on_utc_offset() { format_utc_offset_impl(tm_); }
-  void on_tz_name() { format_tz_name_impl(tm_); }
-
-  void on_year(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write_year(tm_year());
-    format_localized('Y', 'E');
-  }
-  void on_short_year(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write2(split_year_lower(tm_year()));
-    format_localized('y', 'O');
-  }
-  void on_offset_year() {
-    if (is_classic_) return write2(split_year_lower(tm_year()));
-    format_localized('y', 'E');
-  }
-
-  void on_century(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) {
-      auto year = tm_year();
-      auto upper = year / 100;
-      if (year >= -99 && year < 0) {
-        // Zero upper on negative year.
-        *out_++ = '-';
-        *out_++ = '0';
-      } else if (upper >= 0 && upper < 100) {
-        write2(static_cast<int>(upper));
-      } else {
-        out_ = write<Char>(out_, upper);
-      }
-    } else {
-      format_localized('C', 'E');
-    }
-  }
-
-  void on_dec_month(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write2(tm_mon() + 1);
-    format_localized('m', 'O');
-  }
-
-  void on_dec0_week_of_year(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write2((tm_yday() + days_per_week - tm_wday()) / days_per_week);
-    format_localized('U', 'O');
-  }
-  void on_dec1_week_of_year(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) {
-      auto wday = tm_wday();
-      write2((tm_yday() + days_per_week -
-              (wday == 0 ? (days_per_week - 1) : (wday - 1))) /
-             days_per_week);
-    } else {
-      format_localized('W', 'O');
-    }
-  }
-  void on_iso_week_of_year(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write2(tm_iso_week_of_year());
-    format_localized('V', 'O');
-  }
-
-  void on_iso_week_based_year() { write_year(tm_iso_week_year()); }
-  void on_iso_week_based_short_year() {
-    write2(split_year_lower(tm_iso_week_year()));
-  }
-
-  void on_day_of_year() {
-    auto yday = tm_yday() + 1;
-    write1(yday / 100);
-    write2(yday % 100);
-  }
-  void on_day_of_month(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) return write2(tm_mday());
-    format_localized('d', 'O');
-  }
-  void on_day_of_month_space(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) {
-      auto mday = to_unsigned(tm_mday()) % 100;
-      const char* d2 = digits2(mday);
-      *out_++ = mday < 10 ? ' ' : d2[0];
-      *out_++ = d2[1];
-    } else {
-      format_localized('e', 'O');
-    }
-  }
-
-  void on_24_hour(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) return write2(tm_hour());
-    format_localized('H', 'O');
-  }
-  void on_12_hour(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write2(tm_hour12());
-    format_localized('I', 'O');
-  }
-  void on_minute(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) return write2(tm_min());
-    format_localized('M', 'O');
-  }
-  void on_second(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) return write2(tm_sec());
-    format_localized('S', 'O');
-  }
-
-  void on_12_hour_time() {
-    if (is_classic_) {
-      char buf[8];
-      write_digit2_separated(buf, to_unsigned(tm_hour12()),
-                             to_unsigned(tm_min()), to_unsigned(tm_sec()), ':');
-      out_ = copy_str<Char>(std::begin(buf), std::end(buf), out_);
-      *out_++ = ' ';
-      on_am_pm();
-    } else {
-      format_localized('r');
-    }
-  }
-  void on_24_hour_time() {
-    write2(tm_hour());
-    *out_++ = ':';
-    write2(tm_min());
-  }
-  void on_iso_time() {
-    char buf[8];
-    write_digit2_separated(buf, to_unsigned(tm_hour()), to_unsigned(tm_min()),
-                           to_unsigned(tm_sec()), ':');
-    out_ = copy_str<Char>(std::begin(buf), std::end(buf), out_);
-  }
-
-  void on_am_pm() {
-    if (is_classic_) {
-      *out_++ = tm_hour() < 12 ? 'A' : 'P';
-      *out_++ = 'M';
-    } else {
-      format_localized('p');
-    }
-  }
-
-  // These apply to chrono durations but not tm.
-  void on_duration_value() {}
-  void on_duration_unit() {}
-};
-
-struct chrono_format_checker : null_chrono_spec_handler<chrono_format_checker> {
-  FMT_NORETURN void unsupported() { FMT_THROW(format_error("no date")); }
-
-  template <typename Char>
-  FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
-  FMT_CONSTEXPR void on_24_hour(numeric_system) {}
-  FMT_CONSTEXPR void on_12_hour(numeric_system) {}
-  FMT_CONSTEXPR void on_minute(numeric_system) {}
-  FMT_CONSTEXPR void on_second(numeric_system) {}
-  FMT_CONSTEXPR void on_12_hour_time() {}
-  FMT_CONSTEXPR void on_24_hour_time() {}
-  FMT_CONSTEXPR void on_iso_time() {}
-  FMT_CONSTEXPR void on_am_pm() {}
-  FMT_CONSTEXPR void on_duration_value() {}
-  FMT_CONSTEXPR void on_duration_unit() {}
-};
-
-template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-inline bool isnan(T) {
-  return false;
-}
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-inline bool isnan(T value) {
-  return std::isnan(value);
-}
-
-template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-inline bool isfinite(T) {
-  return true;
-}
-
-// Converts value to Int and checks that it's in the range [0, upper).
-template <typename T, typename Int, FMT_ENABLE_IF(std::is_integral<T>::value)>
-inline Int to_nonnegative_int(T value, Int upper) {
-  FMT_ASSERT(value >= 0 && to_unsigned(value) <= to_unsigned(upper),
-             "invalid value");
-  (void)upper;
-  return static_cast<Int>(value);
-}
-template <typename T, typename Int, FMT_ENABLE_IF(!std::is_integral<T>::value)>
-inline Int to_nonnegative_int(T value, Int upper) {
-  if (value < 0 || value > static_cast<T>(upper))
-    FMT_THROW(format_error("invalid value"));
-  return static_cast<Int>(value);
-}
-
-template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-inline T mod(T x, int y) {
-  return x % static_cast<T>(y);
-}
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-inline T mod(T x, int y) {
-  return std::fmod(x, static_cast<T>(y));
-}
-
-// If T is an integral type, maps T to its unsigned counterpart, otherwise
-// leaves it unchanged (unlike std::make_unsigned).
-template <typename T, bool INTEGRAL = std::is_integral<T>::value>
-struct make_unsigned_or_unchanged {
-  using type = T;
-};
-
-template <typename T> struct make_unsigned_or_unchanged<T, true> {
-  using type = typename std::make_unsigned<T>::type;
-};
-
-#if FMT_SAFE_DURATION_CAST
-// throwing version of safe_duration_cast
-template <typename To, typename FromRep, typename FromPeriod>
-To fmt_safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from) {
-  int ec;
-  To to = safe_duration_cast::safe_duration_cast<To>(from, ec);
-  if (ec) FMT_THROW(format_error("cannot format duration"));
-  return to;
-}
-#endif
-
-template <typename Rep, typename Period,
-          FMT_ENABLE_IF(std::is_integral<Rep>::value)>
-inline std::chrono::duration<Rep, std::milli> get_milliseconds(
-    std::chrono::duration<Rep, Period> d) {
-  // this may overflow and/or the result may not fit in the
-  // target type.
-#if FMT_SAFE_DURATION_CAST
-  using CommonSecondsType =
-      typename std::common_type<decltype(d), std::chrono::seconds>::type;
-  const auto d_as_common = fmt_safe_duration_cast<CommonSecondsType>(d);
-  const auto d_as_whole_seconds =
-      fmt_safe_duration_cast<std::chrono::seconds>(d_as_common);
-  // this conversion should be nonproblematic
-  const auto diff = d_as_common - d_as_whole_seconds;
-  const auto ms =
-      fmt_safe_duration_cast<std::chrono::duration<Rep, std::milli>>(diff);
-  return ms;
-#else
-  auto s = std::chrono::duration_cast<std::chrono::seconds>(d);
-  return std::chrono::duration_cast<std::chrono::milliseconds>(d - s);
-#endif
-}
-
-// Returns the number of fractional digits in the range [0, 18] according to the
-// C++20 spec. If more than 18 fractional digits are required then returns 6 for
-// microseconds precision.
-constexpr int count_fractional_digits(long long num, long long den, int n = 0) {
-  return num % den == 0
-             ? n
-             : (n > 18 ? 6 : count_fractional_digits(num * 10, den, n + 1));
-}
-
-constexpr long long pow10(std::uint32_t n) {
-  return n == 0 ? 1 : 10 * pow10(n - 1);
-}
-
-template <class Rep, class Period,
-          FMT_ENABLE_IF(std::numeric_limits<Rep>::is_signed)>
-constexpr std::chrono::duration<Rep, Period> abs(
-    std::chrono::duration<Rep, Period> d) {
-  // We need to compare the duration using the count() method directly
-  // due to a compiler bug in clang-11 regarding the spaceship operator,
-  // when -Wzero-as-null-pointer-constant is enabled.
-  // In clang-12 the bug has been fixed. See
-  // https://bugs.llvm.org/show_bug.cgi?id=46235 and the reproducible example:
-  // https://www.godbolt.org/z/Knbb5joYx.
-  return d.count() >= d.zero().count() ? d : -d;
-}
-
-template <class Rep, class Period,
-          FMT_ENABLE_IF(!std::numeric_limits<Rep>::is_signed)>
-constexpr std::chrono::duration<Rep, Period> abs(
-    std::chrono::duration<Rep, Period> d) {
-  return d;
-}
-
-template <typename Char, typename Rep, typename OutputIt,
-          FMT_ENABLE_IF(std::is_integral<Rep>::value)>
-OutputIt format_duration_value(OutputIt out, Rep val, int) {
-  return write<Char>(out, val);
-}
-
-template <typename Char, typename Rep, typename OutputIt,
-          FMT_ENABLE_IF(std::is_floating_point<Rep>::value)>
-OutputIt format_duration_value(OutputIt out, Rep val, int precision) {
-  auto specs = basic_format_specs<Char>();
-  specs.precision = precision;
-  specs.type = precision >= 0 ? presentation_type::fixed_lower
-                              : presentation_type::general_lower;
-  return write<Char>(out, val, specs);
-}
-
-template <typename Char, typename OutputIt>
-OutputIt copy_unit(string_view unit, OutputIt out, Char) {
-  return std::copy(unit.begin(), unit.end(), out);
-}
-
-template <typename OutputIt>
-OutputIt copy_unit(string_view unit, OutputIt out, wchar_t) {
-  // This works when wchar_t is UTF-32 because units only contain characters
-  // that have the same representation in UTF-16 and UTF-32.
-  utf8_to_utf16 u(unit);
-  return std::copy(u.c_str(), u.c_str() + u.size(), out);
-}
-
-template <typename Char, typename Period, typename OutputIt>
-OutputIt format_duration_unit(OutputIt out) {
-  if (const char* unit = get_units<Period>())
-    return copy_unit(string_view(unit), out, Char());
-  *out++ = '[';
-  out = write<Char>(out, Period::num);
-  if (const_check(Period::den != 1)) {
-    *out++ = '/';
-    out = write<Char>(out, Period::den);
-  }
-  *out++ = ']';
-  *out++ = 's';
-  return out;
-}
-
-class get_locale {
- private:
-  union {
-    std::locale locale_;
-  };
-  bool has_locale_ = false;
-
- public:
-  get_locale(bool localized, locale_ref loc) : has_locale_(localized) {
-    if (localized)
-      ::new (&locale_) std::locale(loc.template get<std::locale>());
-  }
-  ~get_locale() {
-    if (has_locale_) locale_.~locale();
-  }
-  operator const std::locale&() const {
-    return has_locale_ ? locale_ : get_classic_locale();
-  }
-};
-
-template <typename FormatContext, typename OutputIt, typename Rep,
-          typename Period>
-struct chrono_formatter {
-  FormatContext& context;
-  OutputIt out;
-  int precision;
-  bool localized = false;
-  // rep is unsigned to avoid overflow.
-  using rep =
-      conditional_t<std::is_integral<Rep>::value && sizeof(Rep) < sizeof(int),
-                    unsigned, typename make_unsigned_or_unchanged<Rep>::type>;
-  rep val;
-  using seconds = std::chrono::duration<rep>;
-  seconds s;
-  using milliseconds = std::chrono::duration<rep, std::milli>;
-  bool negative;
-
-  using char_type = typename FormatContext::char_type;
-  using tm_writer_type = tm_writer<OutputIt, char_type>;
-
-  chrono_formatter(FormatContext& ctx, OutputIt o,
-                   std::chrono::duration<Rep, Period> d)
-      : context(ctx),
-        out(o),
-        val(static_cast<rep>(d.count())),
-        negative(false) {
-    if (d.count() < 0) {
-      val = 0 - val;
-      negative = true;
-    }
-
-    // this may overflow and/or the result may not fit in the
-    // target type.
-#if FMT_SAFE_DURATION_CAST
-    // might need checked conversion (rep!=Rep)
-    auto tmpval = std::chrono::duration<rep, Period>(val);
-    s = fmt_safe_duration_cast<seconds>(tmpval);
-#else
-    s = std::chrono::duration_cast<seconds>(
-        std::chrono::duration<rep, Period>(val));
-#endif
-  }
-
-  // returns true if nan or inf, writes to out.
-  bool handle_nan_inf() {
-    if (isfinite(val)) {
-      return false;
-    }
-    if (isnan(val)) {
-      write_nan();
-      return true;
-    }
-    // must be +-inf
-    if (val > 0) {
-      write_pinf();
-    } else {
-      write_ninf();
-    }
-    return true;
-  }
-
-  Rep hour() const { return static_cast<Rep>(mod((s.count() / 3600), 24)); }
-
-  Rep hour12() const {
-    Rep hour = static_cast<Rep>(mod((s.count() / 3600), 12));
-    return hour <= 0 ? 12 : hour;
-  }
-
-  Rep minute() const { return static_cast<Rep>(mod((s.count() / 60), 60)); }
-  Rep second() const { return static_cast<Rep>(mod(s.count(), 60)); }
-
-  std::tm time() const {
-    auto time = std::tm();
-    time.tm_hour = to_nonnegative_int(hour(), 24);
-    time.tm_min = to_nonnegative_int(minute(), 60);
-    time.tm_sec = to_nonnegative_int(second(), 60);
-    return time;
-  }
-
-  void write_sign() {
-    if (negative) {
-      *out++ = '-';
-      negative = false;
-    }
-  }
-
-  void write(Rep value, int width) {
-    write_sign();
-    if (isnan(value)) return write_nan();
-    uint32_or_64_or_128_t<int> n =
-        to_unsigned(to_nonnegative_int(value, max_value<int>()));
-    int num_digits = detail::count_digits(n);
-    if (width > num_digits) out = std::fill_n(out, width - num_digits, '0');
-    out = format_decimal<char_type>(out, n, num_digits).end;
-  }
-
-  template <class Duration> void write_fractional_seconds(Duration d) {
-    constexpr auto num_fractional_digits =
-        count_fractional_digits(Duration::period::num, Duration::period::den);
-
-    using subsecond_precision = std::chrono::duration<
-        typename std::common_type<typename Duration::rep,
-                                  std::chrono::seconds::rep>::type,
-        std::ratio<1, detail::pow10(num_fractional_digits)>>;
-    if (std::ratio_less<typename subsecond_precision::period,
-                        std::chrono::seconds::period>::value) {
-      *out++ = '.';
-      // Don't convert long double to integer seconds to avoid overflow.
-      using sec = conditional_t<
-          std::is_same<typename Duration::rep, long double>::value,
-          std::chrono::duration<long double>, std::chrono::seconds>;
-      auto fractional = detail::abs(d) - std::chrono::duration_cast<sec>(d);
-      const auto subseconds =
-          std::chrono::treat_as_floating_point<
-              typename subsecond_precision::rep>::value
-              ? fractional.count()
-              : std::chrono::duration_cast<subsecond_precision>(fractional)
-                    .count();
-      uint32_or_64_or_128_t<long long> n =
-          to_unsigned(to_nonnegative_int(subseconds, max_value<long long>()));
-      int num_digits = detail::count_digits(n);
-      if (num_fractional_digits > num_digits)
-        out = std::fill_n(out, num_fractional_digits - num_digits, '0');
-      out = format_decimal<char_type>(out, n, num_digits).end;
-    }
-  }
-
-  void write_nan() { std::copy_n("nan", 3, out); }
-  void write_pinf() { std::copy_n("inf", 3, out); }
-  void write_ninf() { std::copy_n("-inf", 4, out); }
-
-  template <typename Callback, typename... Args>
-  void format_tm(const tm& time, Callback cb, Args... args) {
-    if (isnan(val)) return write_nan();
-    get_locale loc(localized, context.locale());
-    auto w = tm_writer_type(loc, out, time);
-    (w.*cb)(args...);
-    out = w.out();
-  }
-
-  void on_text(const char_type* begin, const char_type* end) {
-    std::copy(begin, end, out);
-  }
-
-  // These are not implemented because durations don't have date information.
-  void on_abbr_weekday() {}
-  void on_full_weekday() {}
-  void on_dec0_weekday(numeric_system) {}
-  void on_dec1_weekday(numeric_system) {}
-  void on_abbr_month() {}
-  void on_full_month() {}
-  void on_datetime(numeric_system) {}
-  void on_loc_date(numeric_system) {}
-  void on_loc_time(numeric_system) {}
-  void on_us_date() {}
-  void on_iso_date() {}
-  void on_utc_offset() {}
-  void on_tz_name() {}
-  void on_year(numeric_system) {}
-  void on_short_year(numeric_system) {}
-  void on_offset_year() {}
-  void on_century(numeric_system) {}
-  void on_iso_week_based_year() {}
-  void on_iso_week_based_short_year() {}
-  void on_dec_month(numeric_system) {}
-  void on_dec0_week_of_year(numeric_system) {}
-  void on_dec1_week_of_year(numeric_system) {}
-  void on_iso_week_of_year(numeric_system) {}
-  void on_day_of_year() {}
-  void on_day_of_month(numeric_system) {}
-  void on_day_of_month_space(numeric_system) {}
-
-  void on_24_hour(numeric_system ns) {
-    if (handle_nan_inf()) return;
-
-    if (ns == numeric_system::standard) return write(hour(), 2);
-    auto time = tm();
-    time.tm_hour = to_nonnegative_int(hour(), 24);
-    format_tm(time, &tm_writer_type::on_24_hour, ns);
-  }
-
-  void on_12_hour(numeric_system ns) {
-    if (handle_nan_inf()) return;
-
-    if (ns == numeric_system::standard) return write(hour12(), 2);
-    auto time = tm();
-    time.tm_hour = to_nonnegative_int(hour12(), 12);
-    format_tm(time, &tm_writer_type::on_12_hour, ns);
-  }
-
-  void on_minute(numeric_system ns) {
-    if (handle_nan_inf()) return;
-
-    if (ns == numeric_system::standard) return write(minute(), 2);
-    auto time = tm();
-    time.tm_min = to_nonnegative_int(minute(), 60);
-    format_tm(time, &tm_writer_type::on_minute, ns);
-  }
-
-  void on_second(numeric_system ns) {
-    if (handle_nan_inf()) return;
-
-    if (ns == numeric_system::standard) {
-      write(second(), 2);
-      write_fractional_seconds(std::chrono::duration<rep, Period>{val});
-      return;
-    }
-    auto time = tm();
-    time.tm_sec = to_nonnegative_int(second(), 60);
-    format_tm(time, &tm_writer_type::on_second, ns);
-  }
-
-  void on_12_hour_time() {
-    if (handle_nan_inf()) return;
-    format_tm(time(), &tm_writer_type::on_12_hour_time);
-  }
-
-  void on_24_hour_time() {
-    if (handle_nan_inf()) {
-      *out++ = ':';
-      handle_nan_inf();
-      return;
-    }
-
-    write(hour(), 2);
-    *out++ = ':';
-    write(minute(), 2);
-  }
-
-  void on_iso_time() {
-    on_24_hour_time();
-    *out++ = ':';
-    if (handle_nan_inf()) return;
-    on_second(numeric_system::standard);
-  }
-
-  void on_am_pm() {
-    if (handle_nan_inf()) return;
-    format_tm(time(), &tm_writer_type::on_am_pm);
-  }
-
-  void on_duration_value() {
-    if (handle_nan_inf()) return;
-    write_sign();
-    out = format_duration_value<char_type>(out, val, precision);
-  }
-
-  void on_duration_unit() {
-    out = format_duration_unit<char_type, Period>(out);
-  }
-};
-
-FMT_END_DETAIL_NAMESPACE
-
-#if defined(__cpp_lib_chrono) && __cpp_lib_chrono >= 201907
-using weekday = std::chrono::weekday;
-#else
-// A fallback version of weekday.
-class weekday {
- private:
-  unsigned char value;
-
- public:
-  weekday() = default;
-  explicit constexpr weekday(unsigned wd) noexcept
-      : value(static_cast<unsigned char>(wd != 7 ? wd : 0)) {}
-  constexpr unsigned c_encoding() const noexcept { return value; }
-};
-
-class year_month_day {};
-#endif
-
-// A rudimentary weekday formatter.
-template <typename Char> struct formatter<weekday, Char> {
- private:
-  bool localized = false;
-
- public:
-  FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
-      -> decltype(ctx.begin()) {
-    auto begin = ctx.begin(), end = ctx.end();
-    if (begin != end && *begin == 'L') {
-      ++begin;
-      localized = true;
-    }
-    return begin;
-  }
-
-  template <typename FormatContext>
-  auto format(weekday wd, FormatContext& ctx) const -> decltype(ctx.out()) {
-    auto time = std::tm();
-    time.tm_wday = static_cast<int>(wd.c_encoding());
-    detail::get_locale loc(localized, ctx.locale());
-    auto w = detail::tm_writer<decltype(ctx.out()), Char>(loc, ctx.out(), time);
-    w.on_abbr_weekday();
-    return w.out();
-  }
-};
-
-template <typename Rep, typename Period, typename Char>
-struct formatter<std::chrono::duration<Rep, Period>, Char> {
- private:
-  basic_format_specs<Char> specs;
-  int precision = -1;
-  using arg_ref_type = detail::arg_ref<Char>;
-  arg_ref_type width_ref;
-  arg_ref_type precision_ref;
-  bool localized = false;
-  basic_string_view<Char> format_str;
-  using duration = std::chrono::duration<Rep, Period>;
-
-  struct spec_handler {
-    formatter& f;
-    basic_format_parse_context<Char>& context;
-    basic_string_view<Char> format_str;
-
-    template <typename Id> FMT_CONSTEXPR arg_ref_type make_arg_ref(Id arg_id) {
-      context.check_arg_id(arg_id);
-      return arg_ref_type(arg_id);
-    }
-
-    FMT_CONSTEXPR arg_ref_type make_arg_ref(basic_string_view<Char> arg_id) {
-      context.check_arg_id(arg_id);
-      return arg_ref_type(arg_id);
-    }
-
-    FMT_CONSTEXPR arg_ref_type make_arg_ref(detail::auto_id) {
-      return arg_ref_type(context.next_arg_id());
-    }
-
-    void on_error(const char* msg) { FMT_THROW(format_error(msg)); }
-    FMT_CONSTEXPR void on_fill(basic_string_view<Char> fill) {
-      f.specs.fill = fill;
-    }
-    FMT_CONSTEXPR void on_align(align_t align) { f.specs.align = align; }
-    FMT_CONSTEXPR void on_width(int width) { f.specs.width = width; }
-    FMT_CONSTEXPR void on_precision(int _precision) {
-      f.precision = _precision;
-    }
-    FMT_CONSTEXPR void end_precision() {}
-
-    template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
-      f.width_ref = make_arg_ref(arg_id);
-    }
-
-    template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
-      f.precision_ref = make_arg_ref(arg_id);
-    }
-  };
-
-  using iterator = typename basic_format_parse_context<Char>::iterator;
-  struct parse_range {
-    iterator begin;
-    iterator end;
-  };
-
-  FMT_CONSTEXPR parse_range do_parse(basic_format_parse_context<Char>& ctx) {
-    auto begin = ctx.begin(), end = ctx.end();
-    if (begin == end || *begin == '}') return {begin, begin};
-    spec_handler handler{*this, ctx, format_str};
-    begin = detail::parse_align(begin, end, handler);
-    if (begin == end) return {begin, begin};
-    begin = detail::parse_width(begin, end, handler);
-    if (begin == end) return {begin, begin};
-    if (*begin == '.') {
-      if (std::is_floating_point<Rep>::value)
-        begin = detail::parse_precision(begin, end, handler);
-      else
-        handler.on_error("precision not allowed for this argument type");
-    }
-    if (begin != end && *begin == 'L') {
-      ++begin;
-      localized = true;
-    }
-    end = detail::parse_chrono_format(begin, end,
-                                      detail::chrono_format_checker());
-    return {begin, end};
-  }
-
- public:
-  FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
-      -> decltype(ctx.begin()) {
-    auto range = do_parse(ctx);
-    format_str = basic_string_view<Char>(
-        &*range.begin, detail::to_unsigned(range.end - range.begin));
-    return range.end;
-  }
-
-  template <typename FormatContext>
-  auto format(const duration& d, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    auto specs_copy = specs;
-    auto precision_copy = precision;
-    auto begin = format_str.begin(), end = format_str.end();
-    // As a possible future optimization, we could avoid extra copying if width
-    // is not specified.
-    basic_memory_buffer<Char> buf;
-    auto out = std::back_inserter(buf);
-    detail::handle_dynamic_spec<detail::width_checker>(specs_copy.width,
-                                                       width_ref, ctx);
-    detail::handle_dynamic_spec<detail::precision_checker>(precision_copy,
-                                                           precision_ref, ctx);
-    if (begin == end || *begin == '}') {
-      out = detail::format_duration_value<Char>(out, d.count(), precision_copy);
-      detail::format_duration_unit<Char, Period>(out);
-    } else {
-      detail::chrono_formatter<FormatContext, decltype(out), Rep, Period> f(
-          ctx, out, d);
-      f.precision = precision_copy;
-      f.localized = localized;
-      detail::parse_chrono_format(begin, end, f);
-    }
-    return detail::write(
-        ctx.out(), basic_string_view<Char>(buf.data(), buf.size()), specs_copy);
-  }
-};
-
-template <typename Char, typename Duration>
-struct formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
-                 Char> : formatter<std::tm, Char> {
-  FMT_CONSTEXPR formatter() {
-    this->do_parse(default_specs,
-                   default_specs + sizeof(default_specs) / sizeof(Char));
-  }
-
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return this->do_parse(ctx.begin(), ctx.end(), true);
-  }
-
-  template <typename FormatContext>
-  auto format(std::chrono::time_point<std::chrono::system_clock> val,
-              FormatContext& ctx) const -> decltype(ctx.out()) {
-    return formatter<std::tm, Char>::format(localtime(val), ctx);
-  }
-
-  static constexpr const Char default_specs[] = {'%', 'F', ' ', '%', 'T'};
-};
-
-template <typename Char, typename Duration>
-constexpr const Char
-    formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
-              Char>::default_specs[];
-
-template <typename Char> struct formatter<std::tm, Char> {
- private:
-  enum class spec {
-    unknown,
-    year_month_day,
-    hh_mm_ss,
-  };
-  spec spec_ = spec::unknown;
-  basic_string_view<Char> specs;
-
- protected:
-  template <typename It>
-  FMT_CONSTEXPR auto do_parse(It begin, It end, bool with_default = false)
-      -> It {
-    if (begin != end && *begin == ':') ++begin;
-    end = detail::parse_chrono_format(begin, end, detail::tm_format_checker());
-    if (!with_default || end != begin)
-      specs = {begin, detail::to_unsigned(end - begin)};
-    // basic_string_view<>::compare isn't constexpr before C++17.
-    if (specs.size() == 2 && specs[0] == Char('%')) {
-      if (specs[1] == Char('F'))
-        spec_ = spec::year_month_day;
-      else if (specs[1] == Char('T'))
-        spec_ = spec::hh_mm_ss;
-    }
-    return end;
-  }
-
- public:
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return this->do_parse(ctx.begin(), ctx.end());
-  }
-
-  template <typename FormatContext>
-  auto format(const std::tm& tm, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    const auto loc_ref = ctx.locale();
-    detail::get_locale loc(static_cast<bool>(loc_ref), loc_ref);
-    auto w = detail::tm_writer<decltype(ctx.out()), Char>(loc, ctx.out(), tm);
-    if (spec_ == spec::year_month_day)
-      w.on_iso_date();
-    else if (spec_ == spec::hh_mm_ss)
-      w.on_iso_time();
-    else
-      detail::parse_chrono_format(specs.begin(), specs.end(), w);
-    return w.out();
-  }
-};
-
-FMT_MODULE_EXPORT_END
-FMT_END_NAMESPACE
-
-#endif  // FMT_CHRONO_H_
diff --git a/3rdparty/fmt/include/fmt/color.h b/3rdparty/fmt/include/fmt/color.h
deleted file mode 100644
index dfbe4829..00000000
--- a/3rdparty/fmt/include/fmt/color.h
+++ /dev/null
@@ -1,638 +0,0 @@
-// Formatting library for C++ - color support
-//
-// Copyright (c) 2018 - present, Victor Zverovich and fmt contributors
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_COLOR_H_
-#define FMT_COLOR_H_
-
-#include "format.h"
-
-// __declspec(deprecated) is broken in some MSVC versions.
-#if FMT_MSC_VER
-#  define FMT_DEPRECATED_NONMSVC
-#else
-#  define FMT_DEPRECATED_NONMSVC FMT_DEPRECATED
-#endif
-
-FMT_BEGIN_NAMESPACE
-FMT_MODULE_EXPORT_BEGIN
-
-enum class color : uint32_t {
-  alice_blue = 0xF0F8FF,               // rgb(240,248,255)
-  antique_white = 0xFAEBD7,            // rgb(250,235,215)
-  aqua = 0x00FFFF,                     // rgb(0,255,255)
-  aquamarine = 0x7FFFD4,               // rgb(127,255,212)
-  azure = 0xF0FFFF,                    // rgb(240,255,255)
-  beige = 0xF5F5DC,                    // rgb(245,245,220)
-  bisque = 0xFFE4C4,                   // rgb(255,228,196)
-  black = 0x000000,                    // rgb(0,0,0)
-  blanched_almond = 0xFFEBCD,          // rgb(255,235,205)
-  blue = 0x0000FF,                     // rgb(0,0,255)
-  blue_violet = 0x8A2BE2,              // rgb(138,43,226)
-  brown = 0xA52A2A,                    // rgb(165,42,42)
-  burly_wood = 0xDEB887,               // rgb(222,184,135)
-  cadet_blue = 0x5F9EA0,               // rgb(95,158,160)
-  chartreuse = 0x7FFF00,               // rgb(127,255,0)
-  chocolate = 0xD2691E,                // rgb(210,105,30)
-  coral = 0xFF7F50,                    // rgb(255,127,80)
-  cornflower_blue = 0x6495ED,          // rgb(100,149,237)
-  cornsilk = 0xFFF8DC,                 // rgb(255,248,220)
-  crimson = 0xDC143C,                  // rgb(220,20,60)
-  cyan = 0x00FFFF,                     // rgb(0,255,255)
-  dark_blue = 0x00008B,                // rgb(0,0,139)
-  dark_cyan = 0x008B8B,                // rgb(0,139,139)
-  dark_golden_rod = 0xB8860B,          // rgb(184,134,11)
-  dark_gray = 0xA9A9A9,                // rgb(169,169,169)
-  dark_green = 0x006400,               // rgb(0,100,0)
-  dark_khaki = 0xBDB76B,               // rgb(189,183,107)
-  dark_magenta = 0x8B008B,             // rgb(139,0,139)
-  dark_olive_green = 0x556B2F,         // rgb(85,107,47)
-  dark_orange = 0xFF8C00,              // rgb(255,140,0)
-  dark_orchid = 0x9932CC,              // rgb(153,50,204)
-  dark_red = 0x8B0000,                 // rgb(139,0,0)
-  dark_salmon = 0xE9967A,              // rgb(233,150,122)
-  dark_sea_green = 0x8FBC8F,           // rgb(143,188,143)
-  dark_slate_blue = 0x483D8B,          // rgb(72,61,139)
-  dark_slate_gray = 0x2F4F4F,          // rgb(47,79,79)
-  dark_turquoise = 0x00CED1,           // rgb(0,206,209)
-  dark_violet = 0x9400D3,              // rgb(148,0,211)
-  deep_pink = 0xFF1493,                // rgb(255,20,147)
-  deep_sky_blue = 0x00BFFF,            // rgb(0,191,255)
-  dim_gray = 0x696969,                 // rgb(105,105,105)
-  dodger_blue = 0x1E90FF,              // rgb(30,144,255)
-  fire_brick = 0xB22222,               // rgb(178,34,34)
-  floral_white = 0xFFFAF0,             // rgb(255,250,240)
-  forest_green = 0x228B22,             // rgb(34,139,34)
-  fuchsia = 0xFF00FF,                  // rgb(255,0,255)
-  gainsboro = 0xDCDCDC,                // rgb(220,220,220)
-  ghost_white = 0xF8F8FF,              // rgb(248,248,255)
-  gold = 0xFFD700,                     // rgb(255,215,0)
-  golden_rod = 0xDAA520,               // rgb(218,165,32)
-  gray = 0x808080,                     // rgb(128,128,128)
-  green = 0x008000,                    // rgb(0,128,0)
-  green_yellow = 0xADFF2F,             // rgb(173,255,47)
-  honey_dew = 0xF0FFF0,                // rgb(240,255,240)
-  hot_pink = 0xFF69B4,                 // rgb(255,105,180)
-  indian_red = 0xCD5C5C,               // rgb(205,92,92)
-  indigo = 0x4B0082,                   // rgb(75,0,130)
-  ivory = 0xFFFFF0,                    // rgb(255,255,240)
-  khaki = 0xF0E68C,                    // rgb(240,230,140)
-  lavender = 0xE6E6FA,                 // rgb(230,230,250)
-  lavender_blush = 0xFFF0F5,           // rgb(255,240,245)
-  lawn_green = 0x7CFC00,               // rgb(124,252,0)
-  lemon_chiffon = 0xFFFACD,            // rgb(255,250,205)
-  light_blue = 0xADD8E6,               // rgb(173,216,230)
-  light_coral = 0xF08080,              // rgb(240,128,128)
-  light_cyan = 0xE0FFFF,               // rgb(224,255,255)
-  light_golden_rod_yellow = 0xFAFAD2,  // rgb(250,250,210)
-  light_gray = 0xD3D3D3,               // rgb(211,211,211)
-  light_green = 0x90EE90,              // rgb(144,238,144)
-  light_pink = 0xFFB6C1,               // rgb(255,182,193)
-  light_salmon = 0xFFA07A,             // rgb(255,160,122)
-  light_sea_green = 0x20B2AA,          // rgb(32,178,170)
-  light_sky_blue = 0x87CEFA,           // rgb(135,206,250)
-  light_slate_gray = 0x778899,         // rgb(119,136,153)
-  light_steel_blue = 0xB0C4DE,         // rgb(176,196,222)
-  light_yellow = 0xFFFFE0,             // rgb(255,255,224)
-  lime = 0x00FF00,                     // rgb(0,255,0)
-  lime_green = 0x32CD32,               // rgb(50,205,50)
-  linen = 0xFAF0E6,                    // rgb(250,240,230)
-  magenta = 0xFF00FF,                  // rgb(255,0,255)
-  maroon = 0x800000,                   // rgb(128,0,0)
-  medium_aquamarine = 0x66CDAA,        // rgb(102,205,170)
-  medium_blue = 0x0000CD,              // rgb(0,0,205)
-  medium_orchid = 0xBA55D3,            // rgb(186,85,211)
-  medium_purple = 0x9370DB,            // rgb(147,112,219)
-  medium_sea_green = 0x3CB371,         // rgb(60,179,113)
-  medium_slate_blue = 0x7B68EE,        // rgb(123,104,238)
-  medium_spring_green = 0x00FA9A,      // rgb(0,250,154)
-  medium_turquoise = 0x48D1CC,         // rgb(72,209,204)
-  medium_violet_red = 0xC71585,        // rgb(199,21,133)
-  midnight_blue = 0x191970,            // rgb(25,25,112)
-  mint_cream = 0xF5FFFA,               // rgb(245,255,250)
-  misty_rose = 0xFFE4E1,               // rgb(255,228,225)
-  moccasin = 0xFFE4B5,                 // rgb(255,228,181)
-  navajo_white = 0xFFDEAD,             // rgb(255,222,173)
-  navy = 0x000080,                     // rgb(0,0,128)
-  old_lace = 0xFDF5E6,                 // rgb(253,245,230)
-  olive = 0x808000,                    // rgb(128,128,0)
-  olive_drab = 0x6B8E23,               // rgb(107,142,35)
-  orange = 0xFFA500,                   // rgb(255,165,0)
-  orange_red = 0xFF4500,               // rgb(255,69,0)
-  orchid = 0xDA70D6,                   // rgb(218,112,214)
-  pale_golden_rod = 0xEEE8AA,          // rgb(238,232,170)
-  pale_green = 0x98FB98,               // rgb(152,251,152)
-  pale_turquoise = 0xAFEEEE,           // rgb(175,238,238)
-  pale_violet_red = 0xDB7093,          // rgb(219,112,147)
-  papaya_whip = 0xFFEFD5,              // rgb(255,239,213)
-  peach_puff = 0xFFDAB9,               // rgb(255,218,185)
-  peru = 0xCD853F,                     // rgb(205,133,63)
-  pink = 0xFFC0CB,                     // rgb(255,192,203)
-  plum = 0xDDA0DD,                     // rgb(221,160,221)
-  powder_blue = 0xB0E0E6,              // rgb(176,224,230)
-  purple = 0x800080,                   // rgb(128,0,128)
-  rebecca_purple = 0x663399,           // rgb(102,51,153)
-  red = 0xFF0000,                      // rgb(255,0,0)
-  rosy_brown = 0xBC8F8F,               // rgb(188,143,143)
-  royal_blue = 0x4169E1,               // rgb(65,105,225)
-  saddle_brown = 0x8B4513,             // rgb(139,69,19)
-  salmon = 0xFA8072,                   // rgb(250,128,114)
-  sandy_brown = 0xF4A460,              // rgb(244,164,96)
-  sea_green = 0x2E8B57,                // rgb(46,139,87)
-  sea_shell = 0xFFF5EE,                // rgb(255,245,238)
-  sienna = 0xA0522D,                   // rgb(160,82,45)
-  silver = 0xC0C0C0,                   // rgb(192,192,192)
-  sky_blue = 0x87CEEB,                 // rgb(135,206,235)
-  slate_blue = 0x6A5ACD,               // rgb(106,90,205)
-  slate_gray = 0x708090,               // rgb(112,128,144)
-  snow = 0xFFFAFA,                     // rgb(255,250,250)
-  spring_green = 0x00FF7F,             // rgb(0,255,127)
-  steel_blue = 0x4682B4,               // rgb(70,130,180)
-  tan = 0xD2B48C,                      // rgb(210,180,140)
-  teal = 0x008080,                     // rgb(0,128,128)
-  thistle = 0xD8BFD8,                  // rgb(216,191,216)
-  tomato = 0xFF6347,                   // rgb(255,99,71)
-  turquoise = 0x40E0D0,                // rgb(64,224,208)
-  violet = 0xEE82EE,                   // rgb(238,130,238)
-  wheat = 0xF5DEB3,                    // rgb(245,222,179)
-  white = 0xFFFFFF,                    // rgb(255,255,255)
-  white_smoke = 0xF5F5F5,              // rgb(245,245,245)
-  yellow = 0xFFFF00,                   // rgb(255,255,0)
-  yellow_green = 0x9ACD32              // rgb(154,205,50)
-};                                     // enum class color
-
-enum class terminal_color : uint8_t {
-  black = 30,
-  red,
-  green,
-  yellow,
-  blue,
-  magenta,
-  cyan,
-  white,
-  bright_black = 90,
-  bright_red,
-  bright_green,
-  bright_yellow,
-  bright_blue,
-  bright_magenta,
-  bright_cyan,
-  bright_white
-};
-
-enum class emphasis : uint8_t {
-  bold = 1,
-  faint = 1 << 1,
-  italic = 1 << 2,
-  underline = 1 << 3,
-  blink = 1 << 4,
-  reverse = 1 << 5,
-  conceal = 1 << 6,
-  strikethrough = 1 << 7,
-};
-
-// rgb is a struct for red, green and blue colors.
-// Using the name "rgb" makes some editors show the color in a tooltip.
-struct rgb {
-  FMT_CONSTEXPR rgb() : r(0), g(0), b(0) {}
-  FMT_CONSTEXPR rgb(uint8_t r_, uint8_t g_, uint8_t b_) : r(r_), g(g_), b(b_) {}
-  FMT_CONSTEXPR rgb(uint32_t hex)
-      : r((hex >> 16) & 0xFF), g((hex >> 8) & 0xFF), b(hex & 0xFF) {}
-  FMT_CONSTEXPR rgb(color hex)
-      : r((uint32_t(hex) >> 16) & 0xFF),
-        g((uint32_t(hex) >> 8) & 0xFF),
-        b(uint32_t(hex) & 0xFF) {}
-  uint8_t r;
-  uint8_t g;
-  uint8_t b;
-};
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
-// color is a struct of either a rgb color or a terminal color.
-struct color_type {
-  FMT_CONSTEXPR color_type() FMT_NOEXCEPT : is_rgb(), value{} {}
-  FMT_CONSTEXPR color_type(color rgb_color) FMT_NOEXCEPT : is_rgb(true),
-                                                           value{} {
-    value.rgb_color = static_cast<uint32_t>(rgb_color);
-  }
-  FMT_CONSTEXPR color_type(rgb rgb_color) FMT_NOEXCEPT : is_rgb(true), value{} {
-    value.rgb_color = (static_cast<uint32_t>(rgb_color.r) << 16) |
-                      (static_cast<uint32_t>(rgb_color.g) << 8) | rgb_color.b;
-  }
-  FMT_CONSTEXPR color_type(terminal_color term_color) FMT_NOEXCEPT : is_rgb(),
-                                                                     value{} {
-    value.term_color = static_cast<uint8_t>(term_color);
-  }
-  bool is_rgb;
-  union color_union {
-    uint8_t term_color;
-    uint32_t rgb_color;
-  } value;
-};
-
-FMT_END_DETAIL_NAMESPACE
-
-/** A text style consisting of foreground and background colors and emphasis. */
-class text_style {
- public:
-  FMT_CONSTEXPR text_style(emphasis em = emphasis()) FMT_NOEXCEPT
-      : set_foreground_color(),
-        set_background_color(),
-        ems(em) {}
-
-  FMT_CONSTEXPR text_style& operator|=(const text_style& rhs) {
-    if (!set_foreground_color) {
-      set_foreground_color = rhs.set_foreground_color;
-      foreground_color = rhs.foreground_color;
-    } else if (rhs.set_foreground_color) {
-      if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb)
-        FMT_THROW(format_error("can't OR a terminal color"));
-      foreground_color.value.rgb_color |= rhs.foreground_color.value.rgb_color;
-    }
-
-    if (!set_background_color) {
-      set_background_color = rhs.set_background_color;
-      background_color = rhs.background_color;
-    } else if (rhs.set_background_color) {
-      if (!background_color.is_rgb || !rhs.background_color.is_rgb)
-        FMT_THROW(format_error("can't OR a terminal color"));
-      background_color.value.rgb_color |= rhs.background_color.value.rgb_color;
-    }
-
-    ems = static_cast<emphasis>(static_cast<uint8_t>(ems) |
-                                static_cast<uint8_t>(rhs.ems));
-    return *this;
-  }
-
-  friend FMT_CONSTEXPR text_style operator|(text_style lhs,
-                                            const text_style& rhs) {
-    return lhs |= rhs;
-  }
-
-  FMT_DEPRECATED_NONMSVC FMT_CONSTEXPR text_style& operator&=(
-      const text_style& rhs) {
-    return and_assign(rhs);
-  }
-
-  FMT_DEPRECATED_NONMSVC friend FMT_CONSTEXPR text_style
-  operator&(text_style lhs, const text_style& rhs) {
-    return lhs.and_assign(rhs);
-  }
-
-  FMT_CONSTEXPR bool has_foreground() const FMT_NOEXCEPT {
-    return set_foreground_color;
-  }
-  FMT_CONSTEXPR bool has_background() const FMT_NOEXCEPT {
-    return set_background_color;
-  }
-  FMT_CONSTEXPR bool has_emphasis() const FMT_NOEXCEPT {
-    return static_cast<uint8_t>(ems) != 0;
-  }
-  FMT_CONSTEXPR detail::color_type get_foreground() const FMT_NOEXCEPT {
-    FMT_ASSERT(has_foreground(), "no foreground specified for this style");
-    return foreground_color;
-  }
-  FMT_CONSTEXPR detail::color_type get_background() const FMT_NOEXCEPT {
-    FMT_ASSERT(has_background(), "no background specified for this style");
-    return background_color;
-  }
-  FMT_CONSTEXPR emphasis get_emphasis() const FMT_NOEXCEPT {
-    FMT_ASSERT(has_emphasis(), "no emphasis specified for this style");
-    return ems;
-  }
-
- private:
-  FMT_CONSTEXPR text_style(bool is_foreground,
-                           detail::color_type text_color) FMT_NOEXCEPT
-      : set_foreground_color(),
-        set_background_color(),
-        ems() {
-    if (is_foreground) {
-      foreground_color = text_color;
-      set_foreground_color = true;
-    } else {
-      background_color = text_color;
-      set_background_color = true;
-    }
-  }
-
-  // DEPRECATED!
-  FMT_CONSTEXPR text_style& and_assign(const text_style& rhs) {
-    if (!set_foreground_color) {
-      set_foreground_color = rhs.set_foreground_color;
-      foreground_color = rhs.foreground_color;
-    } else if (rhs.set_foreground_color) {
-      if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb)
-        FMT_THROW(format_error("can't AND a terminal color"));
-      foreground_color.value.rgb_color &= rhs.foreground_color.value.rgb_color;
-    }
-
-    if (!set_background_color) {
-      set_background_color = rhs.set_background_color;
-      background_color = rhs.background_color;
-    } else if (rhs.set_background_color) {
-      if (!background_color.is_rgb || !rhs.background_color.is_rgb)
-        FMT_THROW(format_error("can't AND a terminal color"));
-      background_color.value.rgb_color &= rhs.background_color.value.rgb_color;
-    }
-
-    ems = static_cast<emphasis>(static_cast<uint8_t>(ems) &
-                                static_cast<uint8_t>(rhs.ems));
-    return *this;
-  }
-
-  friend FMT_CONSTEXPR_DECL text_style fg(detail::color_type foreground)
-      FMT_NOEXCEPT;
-
-  friend FMT_CONSTEXPR_DECL text_style bg(detail::color_type background)
-      FMT_NOEXCEPT;
-
-  detail::color_type foreground_color;
-  detail::color_type background_color;
-  bool set_foreground_color;
-  bool set_background_color;
-  emphasis ems;
-};
-
-/** Creates a text style from the foreground (text) color. */
-FMT_CONSTEXPR inline text_style fg(detail::color_type foreground) FMT_NOEXCEPT {
-  return text_style(true, foreground);
-}
-
-/** Creates a text style from the background color. */
-FMT_CONSTEXPR inline text_style bg(detail::color_type background) FMT_NOEXCEPT {
-  return text_style(false, background);
-}
-
-FMT_CONSTEXPR inline text_style operator|(emphasis lhs,
-                                          emphasis rhs) FMT_NOEXCEPT {
-  return text_style(lhs) | rhs;
-}
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
-template <typename Char> struct ansi_color_escape {
-  FMT_CONSTEXPR ansi_color_escape(detail::color_type text_color,
-                                  const char* esc) FMT_NOEXCEPT {
-    // If we have a terminal color, we need to output another escape code
-    // sequence.
-    if (!text_color.is_rgb) {
-      bool is_background = esc == string_view("\x1b[48;2;");
-      uint32_t value = text_color.value.term_color;
-      // Background ASCII codes are the same as the foreground ones but with
-      // 10 more.
-      if (is_background) value += 10u;
-
-      size_t index = 0;
-      buffer[index++] = static_cast<Char>('\x1b');
-      buffer[index++] = static_cast<Char>('[');
-
-      if (value >= 100u) {
-        buffer[index++] = static_cast<Char>('1');
-        value %= 100u;
-      }
-      buffer[index++] = static_cast<Char>('0' + value / 10u);
-      buffer[index++] = static_cast<Char>('0' + value % 10u);
-
-      buffer[index++] = static_cast<Char>('m');
-      buffer[index++] = static_cast<Char>('\0');
-      return;
-    }
-
-    for (int i = 0; i < 7; i++) {
-      buffer[i] = static_cast<Char>(esc[i]);
-    }
-    rgb color(text_color.value.rgb_color);
-    to_esc(color.r, buffer + 7, ';');
-    to_esc(color.g, buffer + 11, ';');
-    to_esc(color.b, buffer + 15, 'm');
-    buffer[19] = static_cast<Char>(0);
-  }
-  FMT_CONSTEXPR ansi_color_escape(emphasis em) FMT_NOEXCEPT {
-    uint8_t em_codes[num_emphases] = {};
-    if (has_emphasis(em, emphasis::bold)) em_codes[0] = 1;
-    if (has_emphasis(em, emphasis::faint)) em_codes[1] = 2;
-    if (has_emphasis(em, emphasis::italic)) em_codes[2] = 3;
-    if (has_emphasis(em, emphasis::underline)) em_codes[3] = 4;
-    if (has_emphasis(em, emphasis::blink)) em_codes[4] = 5;
-    if (has_emphasis(em, emphasis::reverse)) em_codes[5] = 7;
-    if (has_emphasis(em, emphasis::conceal)) em_codes[6] = 8;
-    if (has_emphasis(em, emphasis::strikethrough)) em_codes[7] = 9;
-
-    size_t index = 0;
-    for (size_t i = 0; i < num_emphases; ++i) {
-      if (!em_codes[i]) continue;
-      buffer[index++] = static_cast<Char>('\x1b');
-      buffer[index++] = static_cast<Char>('[');
-      buffer[index++] = static_cast<Char>('0' + em_codes[i]);
-      buffer[index++] = static_cast<Char>('m');
-    }
-    buffer[index++] = static_cast<Char>(0);
-  }
-  FMT_CONSTEXPR operator const Char*() const FMT_NOEXCEPT { return buffer; }
-
-  FMT_CONSTEXPR const Char* begin() const FMT_NOEXCEPT { return buffer; }
-  FMT_CONSTEXPR_CHAR_TRAITS const Char* end() const FMT_NOEXCEPT {
-    return buffer + std::char_traits<Char>::length(buffer);
-  }
-
- private:
-  static constexpr size_t num_emphases = 8;
-  Char buffer[7u + 3u * num_emphases + 1u];
-
-  static FMT_CONSTEXPR void to_esc(uint8_t c, Char* out,
-                                   char delimiter) FMT_NOEXCEPT {
-    out[0] = static_cast<Char>('0' + c / 100);
-    out[1] = static_cast<Char>('0' + c / 10 % 10);
-    out[2] = static_cast<Char>('0' + c % 10);
-    out[3] = static_cast<Char>(delimiter);
-  }
-  static FMT_CONSTEXPR bool has_emphasis(emphasis em,
-                                         emphasis mask) FMT_NOEXCEPT {
-    return static_cast<uint8_t>(em) & static_cast<uint8_t>(mask);
-  }
-};
-
-template <typename Char>
-FMT_CONSTEXPR ansi_color_escape<Char> make_foreground_color(
-    detail::color_type foreground) FMT_NOEXCEPT {
-  return ansi_color_escape<Char>(foreground, "\x1b[38;2;");
-}
-
-template <typename Char>
-FMT_CONSTEXPR ansi_color_escape<Char> make_background_color(
-    detail::color_type background) FMT_NOEXCEPT {
-  return ansi_color_escape<Char>(background, "\x1b[48;2;");
-}
-
-template <typename Char>
-FMT_CONSTEXPR ansi_color_escape<Char> make_emphasis(emphasis em) FMT_NOEXCEPT {
-  return ansi_color_escape<Char>(em);
-}
-
-template <typename Char>
-inline void fputs(const Char* chars, FILE* stream) FMT_NOEXCEPT {
-  std::fputs(chars, stream);
-}
-
-template <>
-inline void fputs<wchar_t>(const wchar_t* chars, FILE* stream) FMT_NOEXCEPT {
-  std::fputws(chars, stream);
-}
-
-template <typename Char> inline void reset_color(FILE* stream) FMT_NOEXCEPT {
-  fputs("\x1b[0m", stream);
-}
-
-template <> inline void reset_color<wchar_t>(FILE* stream) FMT_NOEXCEPT {
-  fputs(L"\x1b[0m", stream);
-}
-
-template <typename Char>
-inline void reset_color(buffer<Char>& buffer) FMT_NOEXCEPT {
-  auto reset_color = string_view("\x1b[0m");
-  buffer.append(reset_color.begin(), reset_color.end());
-}
-
-template <typename Char>
-void vformat_to(buffer<Char>& buf, const text_style& ts,
-                basic_string_view<Char> format_str,
-                basic_format_args<buffer_context<type_identity_t<Char>>> args) {
-  bool has_style = false;
-  if (ts.has_emphasis()) {
-    has_style = true;
-    auto emphasis = detail::make_emphasis<Char>(ts.get_emphasis());
-    buf.append(emphasis.begin(), emphasis.end());
-  }
-  if (ts.has_foreground()) {
-    has_style = true;
-    auto foreground = detail::make_foreground_color<Char>(ts.get_foreground());
-    buf.append(foreground.begin(), foreground.end());
-  }
-  if (ts.has_background()) {
-    has_style = true;
-    auto background = detail::make_background_color<Char>(ts.get_background());
-    buf.append(background.begin(), background.end());
-  }
-  detail::vformat_to(buf, format_str, args, {});
-  if (has_style) detail::reset_color<Char>(buf);
-}
-
-FMT_END_DETAIL_NAMESPACE
-
-template <typename S, typename Char = char_t<S>>
-void vprint(std::FILE* f, const text_style& ts, const S& format,
-            basic_format_args<buffer_context<type_identity_t<Char>>> args) {
-  basic_memory_buffer<Char> buf;
-  detail::vformat_to(buf, ts, to_string_view(format), args);
-  buf.push_back(Char(0));
-  detail::fputs(buf.data(), f);
-}
-
-/**
-  \rst
-  Formats a string and prints it to the specified file stream using ANSI
-  escape sequences to specify text formatting.
-
-  **Example**::
-
-    fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
-               "Elapsed time: {0:.2f} seconds", 1.23);
-  \endrst
- */
-template <typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_string<S>::value)>
-void print(std::FILE* f, const text_style& ts, const S& format_str,
-           const Args&... args) {
-  vprint(f, ts, format_str,
-         fmt::make_args_checked<Args...>(format_str, args...));
-}
-
-/**
-  \rst
-  Formats a string and prints it to stdout using ANSI escape sequences to
-  specify text formatting.
-
-  **Example**::
-
-    fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
-               "Elapsed time: {0:.2f} seconds", 1.23);
-  \endrst
- */
-template <typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_string<S>::value)>
-void print(const text_style& ts, const S& format_str, const Args&... args) {
-  return print(stdout, ts, format_str, args...);
-}
-
-template <typename S, typename Char = char_t<S>>
-inline std::basic_string<Char> vformat(
-    const text_style& ts, const S& format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
-  basic_memory_buffer<Char> buf;
-  detail::vformat_to(buf, ts, to_string_view(format_str), args);
-  return fmt::to_string(buf);
-}
-
-/**
-  \rst
-  Formats arguments and returns the result as a string using ANSI
-  escape sequences to specify text formatting.
-
-  **Example**::
-
-    #include <fmt/color.h>
-    std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red),
-                                      "The answer is {}", 42);
-  \endrst
-*/
-template <typename S, typename... Args, typename Char = char_t<S>>
-inline std::basic_string<Char> format(const text_style& ts, const S& format_str,
-                                      const Args&... args) {
-  return fmt::vformat(ts, to_string_view(format_str),
-                      fmt::make_args_checked<Args...>(format_str, args...));
-}
-
-/**
-  Formats a string with the given text_style and writes the output to ``out``.
- */
-template <typename OutputIt, typename Char,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value)>
-OutputIt vformat_to(
-    OutputIt out, const text_style& ts, basic_string_view<Char> format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
-  auto&& buf = detail::get_buffer<Char>(out);
-  detail::vformat_to(buf, ts, format_str, args);
-  return detail::get_iterator(buf);
-}
-
-/**
-  \rst
-  Formats arguments with the given text_style, writes the result to the output
-  iterator ``out`` and returns the iterator past the end of the output range.
-
-  **Example**::
-
-    std::vector<char> out;
-    fmt::format_to(std::back_inserter(out),
-                   fmt::emphasis::bold | fg(fmt::color::red), "{}", 42);
-  \endrst
-*/
-template <typename OutputIt, typename S, typename... Args,
-          bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value&&
-              detail::is_string<S>::value>
-inline auto format_to(OutputIt out, const text_style& ts, const S& format_str,
-                      Args&&... args) ->
-    typename std::enable_if<enable, OutputIt>::type {
-  return vformat_to(out, ts, to_string_view(format_str),
-                    fmt::make_args_checked<Args...>(format_str, args...));
-}
-
-FMT_MODULE_EXPORT_END
-FMT_END_NAMESPACE
-
-#endif  // FMT_COLOR_H_
diff --git a/3rdparty/fmt/include/fmt/compile.h b/3rdparty/fmt/include/fmt/compile.h
deleted file mode 100644
index 1dba3ddb..00000000
--- a/3rdparty/fmt/include/fmt/compile.h
+++ /dev/null
@@ -1,642 +0,0 @@
-// Formatting library for C++ - experimental format string compilation
-//
-// Copyright (c) 2012 - present, Victor Zverovich and fmt contributors
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_COMPILE_H_
-#define FMT_COMPILE_H_
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-namespace detail {
-
-// An output iterator that counts the number of objects written to it and
-// discards them.
-class counting_iterator {
- private:
-  size_t count_;
-
- public:
-  using iterator_category = std::output_iterator_tag;
-  using difference_type = std::ptrdiff_t;
-  using pointer = void;
-  using reference = void;
-  using _Unchecked_type = counting_iterator;  // Mark iterator as checked.
-
-  struct value_type {
-    template <typename T> void operator=(const T&) {}
-  };
-
-  counting_iterator() : count_(0) {}
-
-  size_t count() const { return count_; }
-
-  counting_iterator& operator++() {
-    ++count_;
-    return *this;
-  }
-  counting_iterator operator++(int) {
-    auto it = *this;
-    ++*this;
-    return it;
-  }
-
-  friend counting_iterator operator+(counting_iterator it, difference_type n) {
-    it.count_ += static_cast<size_t>(n);
-    return it;
-  }
-
-  value_type operator*() const { return {}; }
-};
-
-template <typename Char, typename InputIt>
-inline counting_iterator copy_str(InputIt begin, InputIt end,
-                                  counting_iterator it) {
-  return it + (end - begin);
-}
-
-template <typename OutputIt> class truncating_iterator_base {
- protected:
-  OutputIt out_;
-  size_t limit_;
-  size_t count_ = 0;
-
-  truncating_iterator_base() : out_(), limit_(0) {}
-
-  truncating_iterator_base(OutputIt out, size_t limit)
-      : out_(out), limit_(limit) {}
-
- public:
-  using iterator_category = std::output_iterator_tag;
-  using value_type = typename std::iterator_traits<OutputIt>::value_type;
-  using difference_type = std::ptrdiff_t;
-  using pointer = void;
-  using reference = void;
-  using _Unchecked_type =
-      truncating_iterator_base;  // Mark iterator as checked.
-
-  OutputIt base() const { return out_; }
-  size_t count() const { return count_; }
-};
-
-// An output iterator that truncates the output and counts the number of objects
-// written to it.
-template <typename OutputIt,
-          typename Enable = typename std::is_void<
-              typename std::iterator_traits<OutputIt>::value_type>::type>
-class truncating_iterator;
-
-template <typename OutputIt>
-class truncating_iterator<OutputIt, std::false_type>
-    : public truncating_iterator_base<OutputIt> {
-  mutable typename truncating_iterator_base<OutputIt>::value_type blackhole_;
-
- public:
-  using value_type = typename truncating_iterator_base<OutputIt>::value_type;
-
-  truncating_iterator() = default;
-
-  truncating_iterator(OutputIt out, size_t limit)
-      : truncating_iterator_base<OutputIt>(out, limit) {}
-
-  truncating_iterator& operator++() {
-    if (this->count_++ < this->limit_) ++this->out_;
-    return *this;
-  }
-
-  truncating_iterator operator++(int) {
-    auto it = *this;
-    ++*this;
-    return it;
-  }
-
-  value_type& operator*() const {
-    return this->count_ < this->limit_ ? *this->out_ : blackhole_;
-  }
-};
-
-template <typename OutputIt>
-class truncating_iterator<OutputIt, std::true_type>
-    : public truncating_iterator_base<OutputIt> {
- public:
-  truncating_iterator() = default;
-
-  truncating_iterator(OutputIt out, size_t limit)
-      : truncating_iterator_base<OutputIt>(out, limit) {}
-
-  template <typename T> truncating_iterator& operator=(T val) {
-    if (this->count_++ < this->limit_) *this->out_++ = val;
-    return *this;
-  }
-
-  truncating_iterator& operator++() { return *this; }
-  truncating_iterator& operator++(int) { return *this; }
-  truncating_iterator& operator*() { return *this; }
-};
-
-// A compile-time string which is compiled into fast formatting code.
-class compiled_string {};
-
-template <typename S>
-struct is_compiled_string : std::is_base_of<compiled_string, S> {};
-
-/**
-  \rst
-  Converts a string literal *s* into a format string that will be parsed at
-  compile time and converted into efficient formatting code. Requires C++17
-  ``constexpr if`` compiler support.
-
-  **Example**::
-
-    // Converts 42 into std::string using the most efficient method and no
-    // runtime format string processing.
-    std::string s = fmt::format(FMT_COMPILE("{}"), 42);
-  \endrst
- */
-#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
-#  define FMT_COMPILE(s) \
-    FMT_STRING_IMPL(s, fmt::detail::compiled_string, explicit)
-#else
-#  define FMT_COMPILE(s) FMT_STRING(s)
-#endif
-
-#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-template <typename Char, size_t N,
-          fmt::detail_exported::fixed_string<Char, N> Str>
-struct udl_compiled_string : compiled_string {
-  using char_type = Char;
-  constexpr operator basic_string_view<char_type>() const {
-    return {Str.data, N - 1};
-  }
-};
-#endif
-
-template <typename T, typename... Tail>
-const T& first(const T& value, const Tail&...) {
-  return value;
-}
-
-#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
-template <typename... Args> struct type_list {};
-
-// Returns a reference to the argument at index N from [first, rest...].
-template <int N, typename T, typename... Args>
-constexpr const auto& get([[maybe_unused]] const T& first,
-                          [[maybe_unused]] const Args&... rest) {
-  static_assert(N < 1 + sizeof...(Args), "index is out of bounds");
-  if constexpr (N == 0)
-    return first;
-  else
-    return detail::get<N - 1>(rest...);
-}
-
-template <typename Char, typename... Args>
-constexpr int get_arg_index_by_name(basic_string_view<Char> name,
-                                    type_list<Args...>) {
-  return get_arg_index_by_name<Args...>(name);
-}
-
-template <int N, typename> struct get_type_impl;
-
-template <int N, typename... Args> struct get_type_impl<N, type_list<Args...>> {
-  using type =
-      remove_cvref_t<decltype(detail::get<N>(std::declval<Args>()...))>;
-};
-
-template <int N, typename T>
-using get_type = typename get_type_impl<N, T>::type;
-
-template <typename T> struct is_compiled_format : std::false_type {};
-
-template <typename Char> struct text {
-  basic_string_view<Char> data;
-  using char_type = Char;
-
-  template <typename OutputIt, typename... Args>
-  constexpr OutputIt format(OutputIt out, const Args&...) const {
-    return write<Char>(out, data);
-  }
-};
-
-template <typename Char>
-struct is_compiled_format<text<Char>> : std::true_type {};
-
-template <typename Char>
-constexpr text<Char> make_text(basic_string_view<Char> s, size_t pos,
-                               size_t size) {
-  return {{&s[pos], size}};
-}
-
-template <typename Char> struct code_unit {
-  Char value;
-  using char_type = Char;
-
-  template <typename OutputIt, typename... Args>
-  constexpr OutputIt format(OutputIt out, const Args&...) const {
-    return write<Char>(out, value);
-  }
-};
-
-// This ensures that the argument type is convertible to `const T&`.
-template <typename T, int N, typename... Args>
-constexpr const T& get_arg_checked(const Args&... args) {
-  const auto& arg = detail::get<N>(args...);
-  if constexpr (detail::is_named_arg<remove_cvref_t<decltype(arg)>>()) {
-    return arg.value;
-  } else {
-    return arg;
-  }
-}
-
-template <typename Char>
-struct is_compiled_format<code_unit<Char>> : std::true_type {};
-
-// A replacement field that refers to argument N.
-template <typename Char, typename T, int N> struct field {
-  using char_type = Char;
-
-  template <typename OutputIt, typename... Args>
-  constexpr OutputIt format(OutputIt out, const Args&... args) const {
-    return write<Char>(out, get_arg_checked<T, N>(args...));
-  }
-};
-
-template <typename Char, typename T, int N>
-struct is_compiled_format<field<Char, T, N>> : std::true_type {};
-
-// A replacement field that refers to argument with name.
-template <typename Char> struct runtime_named_field {
-  using char_type = Char;
-  basic_string_view<Char> name;
-
-  template <typename OutputIt, typename T>
-  constexpr static bool try_format_argument(
-      OutputIt& out,
-      // [[maybe_unused]] due to unused-but-set-parameter warning in GCC 7,8,9
-      [[maybe_unused]] basic_string_view<Char> arg_name, const T& arg) {
-    if constexpr (is_named_arg<typename std::remove_cv<T>::type>::value) {
-      if (arg_name == arg.name) {
-        out = write<Char>(out, arg.value);
-        return true;
-      }
-    }
-    return false;
-  }
-
-  template <typename OutputIt, typename... Args>
-  constexpr OutputIt format(OutputIt out, const Args&... args) const {
-    bool found = (try_format_argument(out, name, args) || ...);
-    if (!found) {
-      FMT_THROW(format_error("argument with specified name is not found"));
-    }
-    return out;
-  }
-};
-
-template <typename Char>
-struct is_compiled_format<runtime_named_field<Char>> : std::true_type {};
-
-// A replacement field that refers to argument N and has format specifiers.
-template <typename Char, typename T, int N> struct spec_field {
-  using char_type = Char;
-  formatter<T, Char> fmt;
-
-  template <typename OutputIt, typename... Args>
-  constexpr FMT_INLINE OutputIt format(OutputIt out,
-                                       const Args&... args) const {
-    const auto& vargs =
-        fmt::make_format_args<basic_format_context<OutputIt, Char>>(args...);
-    basic_format_context<OutputIt, Char> ctx(out, vargs);
-    return fmt.format(get_arg_checked<T, N>(args...), ctx);
-  }
-};
-
-template <typename Char, typename T, int N>
-struct is_compiled_format<spec_field<Char, T, N>> : std::true_type {};
-
-template <typename L, typename R> struct concat {
-  L lhs;
-  R rhs;
-  using char_type = typename L::char_type;
-
-  template <typename OutputIt, typename... Args>
-  constexpr OutputIt format(OutputIt out, const Args&... args) const {
-    out = lhs.format(out, args...);
-    return rhs.format(out, args...);
-  }
-};
-
-template <typename L, typename R>
-struct is_compiled_format<concat<L, R>> : std::true_type {};
-
-template <typename L, typename R>
-constexpr concat<L, R> make_concat(L lhs, R rhs) {
-  return {lhs, rhs};
-}
-
-struct unknown_format {};
-
-template <typename Char>
-constexpr size_t parse_text(basic_string_view<Char> str, size_t pos) {
-  for (size_t size = str.size(); pos != size; ++pos) {
-    if (str[pos] == '{' || str[pos] == '}') break;
-  }
-  return pos;
-}
-
-template <typename Args, size_t POS, int ID, typename S>
-constexpr auto compile_format_string(S format_str);
-
-template <typename Args, size_t POS, int ID, typename T, typename S>
-constexpr auto parse_tail(T head, S format_str) {
-  if constexpr (POS !=
-                basic_string_view<typename S::char_type>(format_str).size()) {
-    constexpr auto tail = compile_format_string<Args, POS, ID>(format_str);
-    if constexpr (std::is_same<remove_cvref_t<decltype(tail)>,
-                               unknown_format>())
-      return tail;
-    else
-      return make_concat(head, tail);
-  } else {
-    return head;
-  }
-}
-
-template <typename T, typename Char> struct parse_specs_result {
-  formatter<T, Char> fmt;
-  size_t end;
-  int next_arg_id;
-};
-
-constexpr int manual_indexing_id = -1;
-
-template <typename T, typename Char>
-constexpr parse_specs_result<T, Char> parse_specs(basic_string_view<Char> str,
-                                                  size_t pos, int next_arg_id) {
-  str.remove_prefix(pos);
-  auto ctx = basic_format_parse_context<Char>(str, {}, next_arg_id);
-  auto f = formatter<T, Char>();
-  auto end = f.parse(ctx);
-  return {f, pos + fmt::detail::to_unsigned(end - str.data()) + 1,
-          next_arg_id == 0 ? manual_indexing_id : ctx.next_arg_id()};
-}
-
-template <typename Char> struct arg_id_handler {
-  arg_ref<Char> arg_id;
-
-  constexpr int operator()() {
-    FMT_ASSERT(false, "handler cannot be used with automatic indexing");
-    return 0;
-  }
-  constexpr int operator()(int id) {
-    arg_id = arg_ref<Char>(id);
-    return 0;
-  }
-  constexpr int operator()(basic_string_view<Char> id) {
-    arg_id = arg_ref<Char>(id);
-    return 0;
-  }
-
-  constexpr void on_error(const char* message) {
-    FMT_THROW(format_error(message));
-  }
-};
-
-template <typename Char> struct parse_arg_id_result {
-  arg_ref<Char> arg_id;
-  const Char* arg_id_end;
-};
-
-template <int ID, typename Char>
-constexpr auto parse_arg_id(const Char* begin, const Char* end) {
-  auto handler = arg_id_handler<Char>{arg_ref<Char>{}};
-  auto arg_id_end = parse_arg_id(begin, end, handler);
-  return parse_arg_id_result<Char>{handler.arg_id, arg_id_end};
-}
-
-template <typename T, typename Enable = void> struct field_type {
-  using type = remove_cvref_t<T>;
-};
-
-template <typename T>
-struct field_type<T, enable_if_t<detail::is_named_arg<T>::value>> {
-  using type = remove_cvref_t<decltype(T::value)>;
-};
-
-template <typename T, typename Args, size_t END_POS, int ARG_INDEX, int NEXT_ID,
-          typename S>
-constexpr auto parse_replacement_field_then_tail(S format_str) {
-  using char_type = typename S::char_type;
-  constexpr auto str = basic_string_view<char_type>(format_str);
-  constexpr char_type c = END_POS != str.size() ? str[END_POS] : char_type();
-  if constexpr (c == '}') {
-    return parse_tail<Args, END_POS + 1, NEXT_ID>(
-        field<char_type, typename field_type<T>::type, ARG_INDEX>(),
-        format_str);
-  } else if constexpr (c == ':') {
-    constexpr auto result = parse_specs<typename field_type<T>::type>(
-        str, END_POS + 1, NEXT_ID == manual_indexing_id ? 0 : NEXT_ID);
-    return parse_tail<Args, result.end, result.next_arg_id>(
-        spec_field<char_type, typename field_type<T>::type, ARG_INDEX>{
-            result.fmt},
-        format_str);
-  }
-}
-
-// Compiles a non-empty format string and returns the compiled representation
-// or unknown_format() on unrecognized input.
-template <typename Args, size_t POS, int ID, typename S>
-constexpr auto compile_format_string(S format_str) {
-  using char_type = typename S::char_type;
-  constexpr auto str = basic_string_view<char_type>(format_str);
-  if constexpr (str[POS] == '{') {
-    if constexpr (POS + 1 == str.size())
-      FMT_THROW(format_error("unmatched '{' in format string"));
-    if constexpr (str[POS + 1] == '{') {
-      return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
-    } else if constexpr (str[POS + 1] == '}' || str[POS + 1] == ':') {
-      static_assert(ID != manual_indexing_id,
-                    "cannot switch from manual to automatic argument indexing");
-      constexpr auto next_id =
-          ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
-      return parse_replacement_field_then_tail<get_type<ID, Args>, Args,
-                                               POS + 1, ID, next_id>(
-          format_str);
-    } else {
-      constexpr auto arg_id_result =
-          parse_arg_id<ID>(str.data() + POS + 1, str.data() + str.size());
-      constexpr auto arg_id_end_pos = arg_id_result.arg_id_end - str.data();
-      constexpr char_type c =
-          arg_id_end_pos != str.size() ? str[arg_id_end_pos] : char_type();
-      static_assert(c == '}' || c == ':', "missing '}' in format string");
-      if constexpr (arg_id_result.arg_id.kind == arg_id_kind::index) {
-        static_assert(
-            ID == manual_indexing_id || ID == 0,
-            "cannot switch from automatic to manual argument indexing");
-        constexpr auto arg_index = arg_id_result.arg_id.val.index;
-        return parse_replacement_field_then_tail<get_type<arg_index, Args>,
-                                                 Args, arg_id_end_pos,
-                                                 arg_index, manual_indexing_id>(
-            format_str);
-      } else if constexpr (arg_id_result.arg_id.kind == arg_id_kind::name) {
-        constexpr auto arg_index =
-            get_arg_index_by_name(arg_id_result.arg_id.val.name, Args{});
-        if constexpr (arg_index != invalid_arg_index) {
-          constexpr auto next_id =
-              ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
-          return parse_replacement_field_then_tail<
-              decltype(get_type<arg_index, Args>::value), Args, arg_id_end_pos,
-              arg_index, next_id>(format_str);
-        } else {
-          if constexpr (c == '}') {
-            return parse_tail<Args, arg_id_end_pos + 1, ID>(
-                runtime_named_field<char_type>{arg_id_result.arg_id.val.name},
-                format_str);
-          } else if constexpr (c == ':') {
-            return unknown_format();  // no type info for specs parsing
-          }
-        }
-      }
-    }
-  } else if constexpr (str[POS] == '}') {
-    if constexpr (POS + 1 == str.size())
-      FMT_THROW(format_error("unmatched '}' in format string"));
-    return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
-  } else {
-    constexpr auto end = parse_text(str, POS + 1);
-    if constexpr (end - POS > 1) {
-      return parse_tail<Args, end, ID>(make_text(str, POS, end - POS),
-                                       format_str);
-    } else {
-      return parse_tail<Args, end, ID>(code_unit<char_type>{str[POS]},
-                                       format_str);
-    }
-  }
-}
-
-template <typename... Args, typename S,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-constexpr auto compile(S format_str) {
-  constexpr auto str = basic_string_view<typename S::char_type>(format_str);
-  if constexpr (str.size() == 0) {
-    return detail::make_text(str, 0, 0);
-  } else {
-    constexpr auto result =
-        detail::compile_format_string<detail::type_list<Args...>, 0, 0>(
-            format_str);
-    return result;
-  }
-}
-#endif  // defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
-}  // namespace detail
-
-FMT_MODULE_EXPORT_BEGIN
-
-#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
-
-template <typename CompiledFormat, typename... Args,
-          typename Char = typename CompiledFormat::char_type,
-          FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
-FMT_INLINE std::basic_string<Char> format(const CompiledFormat& cf,
-                                          const Args&... args) {
-  auto s = std::basic_string<Char>();
-  cf.format(std::back_inserter(s), args...);
-  return s;
-}
-
-template <typename OutputIt, typename CompiledFormat, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
-constexpr FMT_INLINE OutputIt format_to(OutputIt out, const CompiledFormat& cf,
-                                        const Args&... args) {
-  return cf.format(out, args...);
-}
-
-template <typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
-                                                           Args&&... args) {
-  if constexpr (std::is_same<typename S::char_type, char>::value) {
-    constexpr auto str = basic_string_view<typename S::char_type>(S());
-    if constexpr (str.size() == 2 && str[0] == '{' && str[1] == '}') {
-      const auto& first = detail::first(args...);
-      if constexpr (detail::is_named_arg<
-                        remove_cvref_t<decltype(first)>>::value) {
-        return fmt::to_string(first.value);
-      } else {
-        return fmt::to_string(first);
-      }
-    }
-  }
-  constexpr auto compiled = detail::compile<Args...>(S());
-  if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
-                             detail::unknown_format>()) {
-    return format(static_cast<basic_string_view<typename S::char_type>>(S()),
-                  std::forward<Args>(args)...);
-  } else {
-    return format(compiled, std::forward<Args>(args)...);
-  }
-}
-
-template <typename OutputIt, typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-FMT_CONSTEXPR OutputIt format_to(OutputIt out, const S&, Args&&... args) {
-  constexpr auto compiled = detail::compile<Args...>(S());
-  if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
-                             detail::unknown_format>()) {
-    return format_to(out,
-                     static_cast<basic_string_view<typename S::char_type>>(S()),
-                     std::forward<Args>(args)...);
-  } else {
-    return format_to(out, compiled, std::forward<Args>(args)...);
-  }
-}
-#endif
-
-template <typename OutputIt, typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-format_to_n_result<OutputIt> format_to_n(OutputIt out, size_t n,
-                                         const S& format_str, Args&&... args) {
-  auto it = format_to(detail::truncating_iterator<OutputIt>(out, n), format_str,
-                      std::forward<Args>(args)...);
-  return {it.base(), it.count()};
-}
-
-template <typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-size_t formatted_size(const S& format_str, const Args&... args) {
-  return format_to(detail::counting_iterator(), format_str, args...).count();
-}
-
-template <typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-void print(std::FILE* f, const S& format_str, const Args&... args) {
-  memory_buffer buffer;
-  format_to(std::back_inserter(buffer), format_str, args...);
-  detail::print(f, {buffer.data(), buffer.size()});
-}
-
-template <typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-void print(const S& format_str, const Args&... args) {
-  print(stdout, format_str, args...);
-}
-
-#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-inline namespace literals {
-template <detail_exported::fixed_string Str>
-constexpr detail::udl_compiled_string<
-    remove_cvref_t<decltype(Str.data[0])>,
-    sizeof(Str.data) / sizeof(decltype(Str.data[0])), Str>
-operator""_cf() {
-  return {};
-}
-}  // namespace literals
-#endif
-
-FMT_MODULE_EXPORT_END
-FMT_END_NAMESPACE
-
-#endif  // FMT_COMPILE_H_
diff --git a/3rdparty/fmt/include/fmt/core.h b/3rdparty/fmt/include/fmt/core.h
deleted file mode 100644
index 92a7aa1d..00000000
--- a/3rdparty/fmt/include/fmt/core.h
+++ /dev/null
@@ -1,3236 +0,0 @@
-// Formatting library for C++ - the core API for char/UTF-8
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_CORE_H_
-#define FMT_CORE_H_
-
-#include <cstddef>  // std::byte
-#include <cstdio>   // std::FILE
-#include <cstring>
-#include <iterator>
-#include <limits>
-#include <string>
-#include <type_traits>
-
-// The fmt library version in the form major * 10000 + minor * 100 + patch.
-#define FMT_VERSION 80101
-
-#if defined(__clang__) && !defined(__ibmxl__)
-#  define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
-#else
-#  define FMT_CLANG_VERSION 0
-#endif
-
-#if defined(__GNUC__) && !defined(__clang__) && !defined(__INTEL_COMPILER) && \
-    !defined(__NVCOMPILER)
-#  define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-#else
-#  define FMT_GCC_VERSION 0
-#endif
-
-#ifndef FMT_GCC_PRAGMA
-// Workaround _Pragma bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59884.
-#  if FMT_GCC_VERSION >= 504
-#    define FMT_GCC_PRAGMA(arg) _Pragma(arg)
-#  else
-#    define FMT_GCC_PRAGMA(arg)
-#  endif
-#endif
-
-#ifdef __ICL
-#  define FMT_ICC_VERSION __ICL
-#elif defined(__INTEL_COMPILER)
-#  define FMT_ICC_VERSION __INTEL_COMPILER
-#else
-#  define FMT_ICC_VERSION 0
-#endif
-
-#ifdef __NVCC__
-#  define FMT_NVCC __NVCC__
-#else
-#  define FMT_NVCC 0
-#endif
-
-#ifdef _MSC_VER
-#  define FMT_MSC_VER _MSC_VER
-#  define FMT_MSC_WARNING(...) __pragma(warning(__VA_ARGS__))
-#else
-#  define FMT_MSC_VER 0
-#  define FMT_MSC_WARNING(...)
-#endif
-
-#ifdef __has_feature
-#  define FMT_HAS_FEATURE(x) __has_feature(x)
-#else
-#  define FMT_HAS_FEATURE(x) 0
-#endif
-
-#if defined(__has_include) &&                             \
-    (!defined(__INTELLISENSE__) || FMT_MSC_VER > 1900) && \
-    (!FMT_ICC_VERSION || FMT_ICC_VERSION >= 1600)
-#  define FMT_HAS_INCLUDE(x) __has_include(x)
-#else
-#  define FMT_HAS_INCLUDE(x) 0
-#endif
-
-#ifdef __has_cpp_attribute
-#  define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
-#else
-#  define FMT_HAS_CPP_ATTRIBUTE(x) 0
-#endif
-
-#ifdef _MSVC_LANG
-#  define FMT_CPLUSPLUS _MSVC_LANG
-#else
-#  define FMT_CPLUSPLUS __cplusplus
-#endif
-
-#define FMT_HAS_CPP14_ATTRIBUTE(attribute) \
-  (FMT_CPLUSPLUS >= 201402L && FMT_HAS_CPP_ATTRIBUTE(attribute))
-
-#define FMT_HAS_CPP17_ATTRIBUTE(attribute) \
-  (FMT_CPLUSPLUS >= 201703L && FMT_HAS_CPP_ATTRIBUTE(attribute))
-
-// Check if relaxed C++14 constexpr is supported.
-// GCC doesn't allow throw in constexpr until version 6 (bug 67371).
-#ifndef FMT_USE_CONSTEXPR
-#  define FMT_USE_CONSTEXPR                                           \
-    (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VER >= 1912 || \
-     (FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L)) &&           \
-        !FMT_NVCC && !FMT_ICC_VERSION
-#endif
-#if FMT_USE_CONSTEXPR
-#  define FMT_CONSTEXPR constexpr
-#  define FMT_CONSTEXPR_DECL constexpr
-#else
-#  define FMT_CONSTEXPR
-#  define FMT_CONSTEXPR_DECL
-#endif
-
-#if ((__cplusplus >= 202002L) &&                              \
-     (!defined(_GLIBCXX_RELEASE) || _GLIBCXX_RELEASE > 9)) || \
-    (__cplusplus >= 201709L && FMT_GCC_VERSION >= 1002)
-#  define FMT_CONSTEXPR20 constexpr
-#else
-#  define FMT_CONSTEXPR20
-#endif
-
-// Check if constexpr std::char_traits<>::compare,length is supported.
-#if defined(__GLIBCXX__)
-#  if __cplusplus >= 201703L && defined(_GLIBCXX_RELEASE) && \
-      _GLIBCXX_RELEASE >= 7  // GCC 7+ libstdc++ has _GLIBCXX_RELEASE.
-#    define FMT_CONSTEXPR_CHAR_TRAITS constexpr
-#  endif
-#elif defined(_LIBCPP_VERSION) && __cplusplus >= 201703L && \
-    _LIBCPP_VERSION >= 4000
-#  define FMT_CONSTEXPR_CHAR_TRAITS constexpr
-#elif FMT_MSC_VER >= 1914 && _MSVC_LANG >= 201703L
-#  define FMT_CONSTEXPR_CHAR_TRAITS constexpr
-#endif
-#ifndef FMT_CONSTEXPR_CHAR_TRAITS
-#  define FMT_CONSTEXPR_CHAR_TRAITS
-#endif
-
-// Check if exceptions are disabled.
-#ifndef FMT_EXCEPTIONS
-#  if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \
-      FMT_MSC_VER && !_HAS_EXCEPTIONS
-#    define FMT_EXCEPTIONS 0
-#  else
-#    define FMT_EXCEPTIONS 1
-#  endif
-#endif
-
-// Define FMT_USE_NOEXCEPT to make fmt use noexcept (C++11 feature).
-#ifndef FMT_USE_NOEXCEPT
-#  define FMT_USE_NOEXCEPT 0
-#endif
-
-#if FMT_USE_NOEXCEPT || FMT_HAS_FEATURE(cxx_noexcept) || \
-    FMT_GCC_VERSION >= 408 || FMT_MSC_VER >= 1900
-#  define FMT_DETECTED_NOEXCEPT noexcept
-#  define FMT_HAS_CXX11_NOEXCEPT 1
-#else
-#  define FMT_DETECTED_NOEXCEPT throw()
-#  define FMT_HAS_CXX11_NOEXCEPT 0
-#endif
-
-#ifndef FMT_NOEXCEPT
-#  if FMT_EXCEPTIONS || FMT_HAS_CXX11_NOEXCEPT
-#    define FMT_NOEXCEPT FMT_DETECTED_NOEXCEPT
-#  else
-#    define FMT_NOEXCEPT
-#  endif
-#endif
-
-// [[noreturn]] is disabled on MSVC and NVCC because of bogus unreachable code
-// warnings.
-#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VER && \
-    !FMT_NVCC
-#  define FMT_NORETURN [[noreturn]]
-#else
-#  define FMT_NORETURN
-#endif
-
-#if __cplusplus == 201103L || __cplusplus == 201402L
-#  if defined(__INTEL_COMPILER) || defined(__PGI)
-#    define FMT_FALLTHROUGH
-#  elif defined(__clang__)
-#    define FMT_FALLTHROUGH [[clang::fallthrough]]
-#  elif FMT_GCC_VERSION >= 700 && \
-      (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520)
-#    define FMT_FALLTHROUGH [[gnu::fallthrough]]
-#  else
-#    define FMT_FALLTHROUGH
-#  endif
-#elif FMT_HAS_CPP17_ATTRIBUTE(fallthrough)
-#  define FMT_FALLTHROUGH [[fallthrough]]
-#else
-#  define FMT_FALLTHROUGH
-#endif
-
-#ifndef FMT_NODISCARD
-#  if FMT_HAS_CPP17_ATTRIBUTE(nodiscard)
-#    define FMT_NODISCARD [[nodiscard]]
-#  else
-#    define FMT_NODISCARD
-#  endif
-#endif
-
-#ifndef FMT_USE_FLOAT
-#  define FMT_USE_FLOAT 1
-#endif
-#ifndef FMT_USE_DOUBLE
-#  define FMT_USE_DOUBLE 1
-#endif
-#ifndef FMT_USE_LONG_DOUBLE
-#  define FMT_USE_LONG_DOUBLE 1
-#endif
-
-#ifndef FMT_INLINE
-#  if FMT_GCC_VERSION || FMT_CLANG_VERSION
-#    define FMT_INLINE inline __attribute__((always_inline))
-#  else
-#    define FMT_INLINE inline
-#  endif
-#endif
-
-#ifndef FMT_DEPRECATED
-#  if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VER >= 1900
-#    define FMT_DEPRECATED [[deprecated]]
-#  else
-#    if (defined(__GNUC__) && !defined(__LCC__)) || defined(__clang__)
-#      define FMT_DEPRECATED __attribute__((deprecated))
-#    elif FMT_MSC_VER
-#      define FMT_DEPRECATED __declspec(deprecated)
-#    else
-#      define FMT_DEPRECATED /* deprecated */
-#    endif
-#  endif
-#endif
-
-#ifndef FMT_BEGIN_NAMESPACE
-#  define FMT_BEGIN_NAMESPACE \
-    namespace fmt {           \
-    inline namespace v8 {
-#  define FMT_END_NAMESPACE \
-    }                       \
-    }
-#endif
-
-#ifndef FMT_MODULE_EXPORT
-#  define FMT_MODULE_EXPORT
-#  define FMT_MODULE_EXPORT_BEGIN
-#  define FMT_MODULE_EXPORT_END
-#  define FMT_BEGIN_DETAIL_NAMESPACE namespace detail {
-#  define FMT_END_DETAIL_NAMESPACE }
-#endif
-
-#if !defined(FMT_HEADER_ONLY) && defined(_WIN32)
-#  define FMT_CLASS_API FMT_MSC_WARNING(suppress : 4275)
-#  ifdef FMT_EXPORT
-#    define FMT_API __declspec(dllexport)
-#  elif defined(FMT_SHARED)
-#    define FMT_API __declspec(dllimport)
-#  endif
-#else
-#  define FMT_CLASS_API
-#  if defined(FMT_EXPORT) || defined(FMT_SHARED)
-#    if defined(__GNUC__) || defined(__clang__)
-#      define FMT_API __attribute__((visibility("default")))
-#    endif
-#  endif
-#endif
-#ifndef FMT_API
-#  define FMT_API
-#endif
-
-// libc++ supports string_view in pre-c++17.
-#if (FMT_HAS_INCLUDE(<string_view>) &&                       \
-     (__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \
-    (defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
-#  include <string_view>
-#  define FMT_USE_STRING_VIEW
-#elif FMT_HAS_INCLUDE("experimental/string_view") && __cplusplus >= 201402L
-#  include <experimental/string_view>
-#  define FMT_USE_EXPERIMENTAL_STRING_VIEW
-#endif
-
-#ifndef FMT_UNICODE
-#  define FMT_UNICODE !FMT_MSC_VER
-#endif
-
-#ifndef FMT_CONSTEVAL
-#  if ((FMT_GCC_VERSION >= 1000 || FMT_CLANG_VERSION >= 1101) &&      \
-       __cplusplus > 201703L && !defined(__apple_build_version__)) || \
-      (defined(__cpp_consteval) &&                                    \
-       (!FMT_MSC_VER || _MSC_FULL_VER >= 193030704))
-// consteval is broken in MSVC before VS2022 and Apple clang 13.
-#    define FMT_CONSTEVAL consteval
-#    define FMT_HAS_CONSTEVAL
-#  else
-#    define FMT_CONSTEVAL
-#  endif
-#endif
-
-#ifndef FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-#  if defined(__cpp_nontype_template_args) &&                \
-      ((FMT_GCC_VERSION >= 903 && __cplusplus >= 201709L) || \
-       __cpp_nontype_template_args >= 201911L)
-#    define FMT_USE_NONTYPE_TEMPLATE_PARAMETERS 1
-#  else
-#    define FMT_USE_NONTYPE_TEMPLATE_PARAMETERS 0
-#  endif
-#endif
-
-// Enable minimal optimizations for more compact code in debug mode.
-FMT_GCC_PRAGMA("GCC push_options")
-#ifndef __OPTIMIZE__
-FMT_GCC_PRAGMA("GCC optimize(\"Og\")")
-#endif
-
-FMT_BEGIN_NAMESPACE
-FMT_MODULE_EXPORT_BEGIN
-
-// Implementations of enable_if_t and other metafunctions for older systems.
-template <bool B, typename T = void>
-using enable_if_t = typename std::enable_if<B, T>::type;
-template <bool B, typename T, typename F>
-using conditional_t = typename std::conditional<B, T, F>::type;
-template <bool B> using bool_constant = std::integral_constant<bool, B>;
-template <typename T>
-using remove_reference_t = typename std::remove_reference<T>::type;
-template <typename T>
-using remove_const_t = typename std::remove_const<T>::type;
-template <typename T>
-using remove_cvref_t = typename std::remove_cv<remove_reference_t<T>>::type;
-template <typename T> struct type_identity { using type = T; };
-template <typename T> using type_identity_t = typename type_identity<T>::type;
-
-struct monostate {
-  constexpr monostate() {}
-};
-
-// An enable_if helper to be used in template parameters which results in much
-// shorter symbols: https://godbolt.org/z/sWw4vP. Extra parentheses are needed
-// to workaround a bug in MSVC 2019 (see #1140 and #1186).
-#ifdef FMT_DOC
-#  define FMT_ENABLE_IF(...)
-#else
-#  define FMT_ENABLE_IF(...) enable_if_t<(__VA_ARGS__), int> = 0
-#endif
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
-// Suppress "unused variable" warnings with the method described in
-// https://herbsutter.com/2009/10/18/mailbag-shutting-up-compiler-warnings/.
-// (void)var does not work on many Intel compilers.
-template <typename... T> FMT_CONSTEXPR void ignore_unused(const T&...) {}
-
-constexpr FMT_INLINE auto is_constant_evaluated(bool default_value = false)
-    FMT_NOEXCEPT -> bool {
-#ifdef __cpp_lib_is_constant_evaluated
-  ignore_unused(default_value);
-  return std::is_constant_evaluated();
-#else
-  return default_value;
-#endif
-}
-
-// A function to suppress "conditional expression is constant" warnings.
-template <typename T> constexpr FMT_INLINE auto const_check(T value) -> T {
-  return value;
-}
-
-FMT_NORETURN FMT_API void assert_fail(const char* file, int line,
-                                      const char* message);
-
-#ifndef FMT_ASSERT
-#  ifdef NDEBUG
-// FMT_ASSERT is not empty to avoid -Werror=empty-body.
-#    define FMT_ASSERT(condition, message) \
-      ::fmt::detail::ignore_unused((condition), (message))
-#  else
-#    define FMT_ASSERT(condition, message)                                    \
-      ((condition) /* void() fails with -Winvalid-constexpr on clang 4.0.1 */ \
-           ? (void)0                                                          \
-           : ::fmt::detail::assert_fail(__FILE__, __LINE__, (message)))
-#  endif
-#endif
-
-#ifdef __cpp_lib_byte
-using byte = std::byte;
-#else
-enum class byte : unsigned char {};
-#endif
-
-#if defined(FMT_USE_STRING_VIEW)
-template <typename Char> using std_string_view = std::basic_string_view<Char>;
-#elif defined(FMT_USE_EXPERIMENTAL_STRING_VIEW)
-template <typename Char>
-using std_string_view = std::experimental::basic_string_view<Char>;
-#else
-template <typename T> struct std_string_view {};
-#endif
-
-#ifdef FMT_USE_INT128
-// Do nothing.
-#elif defined(__SIZEOF_INT128__) && !FMT_NVCC && \
-    !(FMT_CLANG_VERSION && FMT_MSC_VER)
-#  define FMT_USE_INT128 1
-using int128_t = __int128_t;
-using uint128_t = __uint128_t;
-template <typename T> inline auto convert_for_visit(T value) -> T {
-  return value;
-}
-#else
-#  define FMT_USE_INT128 0
-#endif
-#if !FMT_USE_INT128
-enum class int128_t {};
-enum class uint128_t {};
-// Reduce template instantiations.
-template <typename T> inline auto convert_for_visit(T) -> monostate {
-  return {};
-}
-#endif
-
-// Casts a nonnegative integer to unsigned.
-template <typename Int>
-FMT_CONSTEXPR auto to_unsigned(Int value) ->
-    typename std::make_unsigned<Int>::type {
-  FMT_ASSERT(value >= 0, "negative value");
-  return static_cast<typename std::make_unsigned<Int>::type>(value);
-}
-
-FMT_MSC_WARNING(suppress : 4566) constexpr unsigned char micro[] = "\u00B5";
-
-constexpr auto is_utf8() -> bool {
-  // Avoid buggy sign extensions in MSVC's constant evaluation mode.
-  // https://developercommunity.visualstudio.com/t/C-difference-in-behavior-for-unsigned/1233612
-  using uchar = unsigned char;
-  return FMT_UNICODE || (sizeof(micro) == 3 && uchar(micro[0]) == 0xC2 &&
-                         uchar(micro[1]) == 0xB5);
-}
-FMT_END_DETAIL_NAMESPACE
-
-/**
-  An implementation of ``std::basic_string_view`` for pre-C++17. It provides a
-  subset of the API. ``fmt::basic_string_view`` is used for format strings even
-  if ``std::string_view`` is available to prevent issues when a library is
-  compiled with a different ``-std`` option than the client code (which is not
-  recommended).
- */
-template <typename Char> class basic_string_view {
- private:
-  const Char* data_;
-  size_t size_;
-
- public:
-  using value_type = Char;
-  using iterator = const Char*;
-
-  constexpr basic_string_view() FMT_NOEXCEPT : data_(nullptr), size_(0) {}
-
-  /** Constructs a string reference object from a C string and a size. */
-  constexpr basic_string_view(const Char* s, size_t count) FMT_NOEXCEPT
-      : data_(s),
-        size_(count) {}
-
-  /**
-    \rst
-    Constructs a string reference object from a C string computing
-    the size with ``std::char_traits<Char>::length``.
-    \endrst
-   */
-  FMT_CONSTEXPR_CHAR_TRAITS
-  FMT_INLINE
-  basic_string_view(const Char* s)
-      : data_(s),
-        size_(detail::const_check(std::is_same<Char, char>::value &&
-                                  !detail::is_constant_evaluated(true))
-                  ? std::strlen(reinterpret_cast<const char*>(s))
-                  : std::char_traits<Char>::length(s)) {}
-
-  /** Constructs a string reference from a ``std::basic_string`` object. */
-  template <typename Traits, typename Alloc>
-  FMT_CONSTEXPR basic_string_view(
-      const std::basic_string<Char, Traits, Alloc>& s) FMT_NOEXCEPT
-      : data_(s.data()),
-        size_(s.size()) {}
-
-  template <typename S, FMT_ENABLE_IF(std::is_same<
-                                      S, detail::std_string_view<Char>>::value)>
-  FMT_CONSTEXPR basic_string_view(S s) FMT_NOEXCEPT : data_(s.data()),
-                                                      size_(s.size()) {}
-
-  /** Returns a pointer to the string data. */
-  constexpr auto data() const FMT_NOEXCEPT -> const Char* { return data_; }
-
-  /** Returns the string size. */
-  constexpr auto size() const FMT_NOEXCEPT -> size_t { return size_; }
-
-  constexpr auto begin() const FMT_NOEXCEPT -> iterator { return data_; }
-  constexpr auto end() const FMT_NOEXCEPT -> iterator { return data_ + size_; }
-
-  constexpr auto operator[](size_t pos) const FMT_NOEXCEPT -> const Char& {
-    return data_[pos];
-  }
-
-  FMT_CONSTEXPR void remove_prefix(size_t n) FMT_NOEXCEPT {
-    data_ += n;
-    size_ -= n;
-  }
-
-  // Lexicographically compare this string reference to other.
-  FMT_CONSTEXPR_CHAR_TRAITS auto compare(basic_string_view other) const -> int {
-    size_t str_size = size_ < other.size_ ? size_ : other.size_;
-    int result = std::char_traits<Char>::compare(data_, other.data_, str_size);
-    if (result == 0)
-      result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1);
-    return result;
-  }
-
-  FMT_CONSTEXPR_CHAR_TRAITS friend auto operator==(basic_string_view lhs,
-                                                   basic_string_view rhs)
-      -> bool {
-    return lhs.compare(rhs) == 0;
-  }
-  friend auto operator!=(basic_string_view lhs, basic_string_view rhs) -> bool {
-    return lhs.compare(rhs) != 0;
-  }
-  friend auto operator<(basic_string_view lhs, basic_string_view rhs) -> bool {
-    return lhs.compare(rhs) < 0;
-  }
-  friend auto operator<=(basic_string_view lhs, basic_string_view rhs) -> bool {
-    return lhs.compare(rhs) <= 0;
-  }
-  friend auto operator>(basic_string_view lhs, basic_string_view rhs) -> bool {
-    return lhs.compare(rhs) > 0;
-  }
-  friend auto operator>=(basic_string_view lhs, basic_string_view rhs) -> bool {
-    return lhs.compare(rhs) >= 0;
-  }
-};
-
-using string_view = basic_string_view<char>;
-
-/** Specifies if ``T`` is a character type. Can be specialized by users. */
-template <typename T> struct is_char : std::false_type {};
-template <> struct is_char<char> : std::true_type {};
-
-// Returns a string view of `s`.
-template <typename Char, FMT_ENABLE_IF(is_char<Char>::value)>
-FMT_INLINE auto to_string_view(const Char* s) -> basic_string_view<Char> {
-  return s;
-}
-template <typename Char, typename Traits, typename Alloc>
-inline auto to_string_view(const std::basic_string<Char, Traits, Alloc>& s)
-    -> basic_string_view<Char> {
-  return s;
-}
-template <typename Char>
-constexpr auto to_string_view(basic_string_view<Char> s)
-    -> basic_string_view<Char> {
-  return s;
-}
-template <typename Char,
-          FMT_ENABLE_IF(!std::is_empty<detail::std_string_view<Char>>::value)>
-inline auto to_string_view(detail::std_string_view<Char> s)
-    -> basic_string_view<Char> {
-  return s;
-}
-
-// A base class for compile-time strings. It is defined in the fmt namespace to
-// make formatting functions visible via ADL, e.g. format(FMT_STRING("{}"), 42).
-struct compile_string {};
-
-template <typename S>
-struct is_compile_string : std::is_base_of<compile_string, S> {};
-
-template <typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
-constexpr auto to_string_view(const S& s)
-    -> basic_string_view<typename S::char_type> {
-  return basic_string_view<typename S::char_type>(s);
-}
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
-void to_string_view(...);
-using fmt::to_string_view;
-
-// Specifies whether S is a string type convertible to fmt::basic_string_view.
-// It should be a constexpr function but MSVC 2017 fails to compile it in
-// enable_if and MSVC 2015 fails to compile it as an alias template.
-template <typename S>
-struct is_string : std::is_class<decltype(to_string_view(std::declval<S>()))> {
-};
-
-template <typename S, typename = void> struct char_t_impl {};
-template <typename S> struct char_t_impl<S, enable_if_t<is_string<S>::value>> {
-  using result = decltype(to_string_view(std::declval<S>()));
-  using type = typename result::value_type;
-};
-
-// Reports a compile-time error if S is not a valid format string.
-template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
-FMT_INLINE void check_format_string(const S&) {
-#ifdef FMT_ENFORCE_COMPILE_STRING
-  static_assert(is_compile_string<S>::value,
-                "FMT_ENFORCE_COMPILE_STRING requires all format strings to use "
-                "FMT_STRING.");
-#endif
-}
-template <typename..., typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
-void check_format_string(S);
-
-FMT_NORETURN FMT_API void throw_format_error(const char* message);
-
-struct error_handler {
-  constexpr error_handler() = default;
-  constexpr error_handler(const error_handler&) = default;
-
-  // This function is intentionally not constexpr to give a compile-time error.
-  FMT_NORETURN FMT_API void on_error(const char* message);
-};
-FMT_END_DETAIL_NAMESPACE
-
-/** String's character type. */
-template <typename S> using char_t = typename detail::char_t_impl<S>::type;
-
-/**
-  \rst
-  Parsing context consisting of a format string range being parsed and an
-  argument counter for automatic indexing.
-  You can use the ``format_parse_context`` type alias for ``char`` instead.
-  \endrst
- */
-template <typename Char, typename ErrorHandler = detail::error_handler>
-class basic_format_parse_context : private ErrorHandler {
- private:
-  basic_string_view<Char> format_str_;
-  int next_arg_id_;
-
- public:
-  using char_type = Char;
-  using iterator = typename basic_string_view<Char>::iterator;
-
-  explicit constexpr basic_format_parse_context(
-      basic_string_view<Char> format_str, ErrorHandler eh = {},
-      int next_arg_id = 0)
-      : ErrorHandler(eh), format_str_(format_str), next_arg_id_(next_arg_id) {}
-
-  /**
-    Returns an iterator to the beginning of the format string range being
-    parsed.
-   */
-  constexpr auto begin() const FMT_NOEXCEPT -> iterator {
-    return format_str_.begin();
-  }
-
-  /**
-    Returns an iterator past the end of the format string range being parsed.
-   */
-  constexpr auto end() const FMT_NOEXCEPT -> iterator {
-    return format_str_.end();
-  }
-
-  /** Advances the begin iterator to ``it``. */
-  FMT_CONSTEXPR void advance_to(iterator it) {
-    format_str_.remove_prefix(detail::to_unsigned(it - begin()));
-  }
-
-  /**
-    Reports an error if using the manual argument indexing; otherwise returns
-    the next argument index and switches to the automatic indexing.
-   */
-  FMT_CONSTEXPR auto next_arg_id() -> int {
-    // Don't check if the argument id is valid to avoid overhead and because it
-    // will be checked during formatting anyway.
-    if (next_arg_id_ >= 0) return next_arg_id_++;
-    on_error("cannot switch from manual to automatic argument indexing");
-    return 0;
-  }
-
-  /**
-    Reports an error if using the automatic argument indexing; otherwise
-    switches to the manual indexing.
-   */
-  FMT_CONSTEXPR void check_arg_id(int) {
-    if (next_arg_id_ > 0)
-      on_error("cannot switch from automatic to manual argument indexing");
-    else
-      next_arg_id_ = -1;
-  }
-
-  FMT_CONSTEXPR void check_arg_id(basic_string_view<Char>) {}
-
-  FMT_CONSTEXPR void on_error(const char* message) {
-    ErrorHandler::on_error(message);
-  }
-
-  constexpr auto error_handler() const -> ErrorHandler { return *this; }
-};
-
-using format_parse_context = basic_format_parse_context<char>;
-
-template <typename Context> class basic_format_arg;
-template <typename Context> class basic_format_args;
-template <typename Context> class dynamic_format_arg_store;
-
-// A formatter for objects of type T.
-template <typename T, typename Char = char, typename Enable = void>
-struct formatter {
-  // A deleted default constructor indicates a disabled formatter.
-  formatter() = delete;
-};
-
-// Specifies if T has an enabled formatter specialization. A type can be
-// formattable even if it doesn't have a formatter e.g. via a conversion.
-template <typename T, typename Context>
-using has_formatter =
-    std::is_constructible<typename Context::template formatter_type<T>>;
-
-// Checks whether T is a container with contiguous storage.
-template <typename T> struct is_contiguous : std::false_type {};
-template <typename Char>
-struct is_contiguous<std::basic_string<Char>> : std::true_type {};
-
-class appender;
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
-template <typename Context, typename T>
-constexpr auto has_const_formatter_impl(T*)
-    -> decltype(typename Context::template formatter_type<T>().format(
-                    std::declval<const T&>(), std::declval<Context&>()),
-                true) {
-  return true;
-}
-template <typename Context>
-constexpr auto has_const_formatter_impl(...) -> bool {
-  return false;
-}
-template <typename T, typename Context>
-constexpr auto has_const_formatter() -> bool {
-  return has_const_formatter_impl<Context>(static_cast<T*>(nullptr));
-}
-
-// Extracts a reference to the container from back_insert_iterator.
-template <typename Container>
-inline auto get_container(std::back_insert_iterator<Container> it)
-    -> Container& {
-  using bi_iterator = std::back_insert_iterator<Container>;
-  struct accessor : bi_iterator {
-    accessor(bi_iterator iter) : bi_iterator(iter) {}
-    using bi_iterator::container;
-  };
-  return *accessor(it).container;
-}
-
-template <typename Char, typename InputIt, typename OutputIt>
-FMT_CONSTEXPR auto copy_str(InputIt begin, InputIt end, OutputIt out)
-    -> OutputIt {
-  while (begin != end) *out++ = static_cast<Char>(*begin++);
-  return out;
-}
-
-template <typename Char, typename T, typename U,
-          FMT_ENABLE_IF(
-              std::is_same<remove_const_t<T>, U>::value&& is_char<U>::value)>
-FMT_CONSTEXPR auto copy_str(T* begin, T* end, U* out) -> U* {
-  if (is_constant_evaluated()) return copy_str<Char, T*, U*>(begin, end, out);
-  auto size = to_unsigned(end - begin);
-  memcpy(out, begin, size * sizeof(U));
-  return out + size;
-}
-
-/**
-  \rst
-  A contiguous memory buffer with an optional growing ability. It is an internal
-  class and shouldn't be used directly, only via `~fmt::basic_memory_buffer`.
-  \endrst
- */
-template <typename T> class buffer {
- private:
-  T* ptr_;
-  size_t size_;
-  size_t capacity_;
-
- protected:
-  // Don't initialize ptr_ since it is not accessed to save a few cycles.
-  FMT_MSC_WARNING(suppress : 26495)
-  buffer(size_t sz) FMT_NOEXCEPT : size_(sz), capacity_(sz) {}
-
-  FMT_CONSTEXPR20 buffer(T* p = nullptr, size_t sz = 0,
-                         size_t cap = 0) FMT_NOEXCEPT : ptr_(p),
-                                                        size_(sz),
-                                                        capacity_(cap) {}
-
-  FMT_CONSTEXPR20 ~buffer() = default;
-  buffer(buffer&&) = default;
-
-  /** Sets the buffer data and capacity. */
-  FMT_CONSTEXPR void set(T* buf_data, size_t buf_capacity) FMT_NOEXCEPT {
-    ptr_ = buf_data;
-    capacity_ = buf_capacity;
-  }
-
-  /** Increases the buffer capacity to hold at least *capacity* elements. */
-  virtual FMT_CONSTEXPR20 void grow(size_t capacity) = 0;
-
- public:
-  using value_type = T;
-  using const_reference = const T&;
-
-  buffer(const buffer&) = delete;
-  void operator=(const buffer&) = delete;
-
-  auto begin() FMT_NOEXCEPT -> T* { return ptr_; }
-  auto end() FMT_NOEXCEPT -> T* { return ptr_ + size_; }
-
-  auto begin() const FMT_NOEXCEPT -> const T* { return ptr_; }
-  auto end() const FMT_NOEXCEPT -> const T* { return ptr_ + size_; }
-
-  /** Returns the size of this buffer. */
-  constexpr auto size() const FMT_NOEXCEPT -> size_t { return size_; }
-
-  /** Returns the capacity of this buffer. */
-  constexpr auto capacity() const FMT_NOEXCEPT -> size_t { return capacity_; }
-
-  /** Returns a pointer to the buffer data. */
-  FMT_CONSTEXPR auto data() FMT_NOEXCEPT -> T* { return ptr_; }
-
-  /** Returns a pointer to the buffer data. */
-  FMT_CONSTEXPR auto data() const FMT_NOEXCEPT -> const T* { return ptr_; }
-
-  /** Clears this buffer. */
-  void clear() { size_ = 0; }
-
-  // Tries resizing the buffer to contain *count* elements. If T is a POD type
-  // the new elements may not be initialized.
-  FMT_CONSTEXPR20 void try_resize(size_t count) {
-    try_reserve(count);
-    size_ = count <= capacity_ ? count : capacity_;
-  }
-
-  // Tries increasing the buffer capacity to *new_capacity*. It can increase the
-  // capacity by a smaller amount than requested but guarantees there is space
-  // for at least one additional element either by increasing the capacity or by
-  // flushing the buffer if it is full.
-  FMT_CONSTEXPR20 void try_reserve(size_t new_capacity) {
-    if (new_capacity > capacity_) grow(new_capacity);
-  }
-
-  FMT_CONSTEXPR20 void push_back(const T& value) {
-    try_reserve(size_ + 1);
-    ptr_[size_++] = value;
-  }
-
-  /** Appends data to the end of the buffer. */
-  template <typename U> void append(const U* begin, const U* end);
-
-  template <typename I> FMT_CONSTEXPR auto operator[](I index) -> T& {
-    return ptr_[index];
-  }
-  template <typename I>
-  FMT_CONSTEXPR auto operator[](I index) const -> const T& {
-    return ptr_[index];
-  }
-};
-
-struct buffer_traits {
-  explicit buffer_traits(size_t) {}
-  auto count() const -> size_t { return 0; }
-  auto limit(size_t size) -> size_t { return size; }
-};
-
-class fixed_buffer_traits {
- private:
-  size_t count_ = 0;
-  size_t limit_;
-
- public:
-  explicit fixed_buffer_traits(size_t limit) : limit_(limit) {}
-  auto count() const -> size_t { return count_; }
-  auto limit(size_t size) -> size_t {
-    size_t n = limit_ > count_ ? limit_ - count_ : 0;
-    count_ += size;
-    return size < n ? size : n;
-  }
-};
-
-// A buffer that writes to an output iterator when flushed.
-template <typename OutputIt, typename T, typename Traits = buffer_traits>
-class iterator_buffer final : public Traits, public buffer<T> {
- private:
-  OutputIt out_;
-  enum { buffer_size = 256 };
-  T data_[buffer_size];
-
- protected:
-  FMT_CONSTEXPR20 void grow(size_t) override {
-    if (this->size() == buffer_size) flush();
-  }
-
-  void flush() {
-    auto size = this->size();
-    this->clear();
-    out_ = copy_str<T>(data_, data_ + this->limit(size), out_);
-  }
-
- public:
-  explicit iterator_buffer(OutputIt out, size_t n = buffer_size)
-      : Traits(n), buffer<T>(data_, 0, buffer_size), out_(out) {}
-  iterator_buffer(iterator_buffer&& other)
-      : Traits(other), buffer<T>(data_, 0, buffer_size), out_(other.out_) {}
-  ~iterator_buffer() { flush(); }
-
-  auto out() -> OutputIt {
-    flush();
-    return out_;
-  }
-  auto count() const -> size_t { return Traits::count() + this->size(); }
-};
-
-template <typename T>
-class iterator_buffer<T*, T, fixed_buffer_traits> final
-    : public fixed_buffer_traits,
-      public buffer<T> {
- private:
-  T* out_;
-  enum { buffer_size = 256 };
-  T data_[buffer_size];
-
- protected:
-  FMT_CONSTEXPR20 void grow(size_t) override {
-    if (this->size() == this->capacity()) flush();
-  }
-
-  void flush() {
-    size_t n = this->limit(this->size());
-    if (this->data() == out_) {
-      out_ += n;
-      this->set(data_, buffer_size);
-    }
-    this->clear();
-  }
-
- public:
-  explicit iterator_buffer(T* out, size_t n = buffer_size)
-      : fixed_buffer_traits(n), buffer<T>(out, 0, n), out_(out) {}
-  iterator_buffer(iterator_buffer&& other)
-      : fixed_buffer_traits(other),
-        buffer<T>(std::move(other)),
-        out_(other.out_) {
-    if (this->data() != out_) {
-      this->set(data_, buffer_size);
-      this->clear();
-    }
-  }
-  ~iterator_buffer() { flush(); }
-
-  auto out() -> T* {
-    flush();
-    return out_;
-  }
-  auto count() const -> size_t {
-    return fixed_buffer_traits::count() + this->size();
-  }
-};
-
-template <typename T> class iterator_buffer<T*, T> final : public buffer<T> {
- protected:
-  FMT_CONSTEXPR20 void grow(size_t) override {}
-
- public:
-  explicit iterator_buffer(T* out, size_t = 0) : buffer<T>(out, 0, ~size_t()) {}
-
-  auto out() -> T* { return &*this->end(); }
-};
-
-// A buffer that writes to a container with the contiguous storage.
-template <typename Container>
-class iterator_buffer<std::back_insert_iterator<Container>,
-                      enable_if_t<is_contiguous<Container>::value,
-                                  typename Container::value_type>>
-    final : public buffer<typename Container::value_type> {
- private:
-  Container& container_;
-
- protected:
-  FMT_CONSTEXPR20 void grow(size_t capacity) override {
-    container_.resize(capacity);
-    this->set(&container_[0], capacity);
-  }
-
- public:
-  explicit iterator_buffer(Container& c)
-      : buffer<typename Container::value_type>(c.size()), container_(c) {}
-  explicit iterator_buffer(std::back_insert_iterator<Container> out, size_t = 0)
-      : iterator_buffer(get_container(out)) {}
-  auto out() -> std::back_insert_iterator<Container> {
-    return std::back_inserter(container_);
-  }
-};
-
-// A buffer that counts the number of code units written discarding the output.
-template <typename T = char> class counting_buffer final : public buffer<T> {
- private:
-  enum { buffer_size = 256 };
-  T data_[buffer_size];
-  size_t count_ = 0;
-
- protected:
-  FMT_CONSTEXPR20 void grow(size_t) override {
-    if (this->size() != buffer_size) return;
-    count_ += this->size();
-    this->clear();
-  }
-
- public:
-  counting_buffer() : buffer<T>(data_, 0, buffer_size) {}
-
-  auto count() -> size_t { return count_ + this->size(); }
-};
-
-template <typename T>
-using buffer_appender = conditional_t<std::is_same<T, char>::value, appender,
-                                      std::back_insert_iterator<buffer<T>>>;
-
-// Maps an output iterator to a buffer.
-template <typename T, typename OutputIt>
-auto get_buffer(OutputIt out) -> iterator_buffer<OutputIt, T> {
-  return iterator_buffer<OutputIt, T>(out);
-}
-
-template <typename Buffer>
-auto get_iterator(Buffer& buf) -> decltype(buf.out()) {
-  return buf.out();
-}
-template <typename T> auto get_iterator(buffer<T>& buf) -> buffer_appender<T> {
-  return buffer_appender<T>(buf);
-}
-
-template <typename T, typename Char = char, typename Enable = void>
-struct fallback_formatter {
-  fallback_formatter() = delete;
-};
-
-// Specifies if T has an enabled fallback_formatter specialization.
-template <typename T, typename Char>
-using has_fallback_formatter =
-    std::is_constructible<fallback_formatter<T, Char>>;
-
-struct view {};
-
-template <typename Char, typename T> struct named_arg : view {
-  const Char* name;
-  const T& value;
-  named_arg(const Char* n, const T& v) : name(n), value(v) {}
-};
-
-template <typename Char> struct named_arg_info {
-  const Char* name;
-  int id;
-};
-
-template <typename T, typename Char, size_t NUM_ARGS, size_t NUM_NAMED_ARGS>
-struct arg_data {
-  // args_[0].named_args points to named_args_ to avoid bloating format_args.
-  // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
-  T args_[1 + (NUM_ARGS != 0 ? NUM_ARGS : +1)];
-  named_arg_info<Char> named_args_[NUM_NAMED_ARGS];
-
-  template <typename... U>
-  arg_data(const U&... init) : args_{T(named_args_, NUM_NAMED_ARGS), init...} {}
-  arg_data(const arg_data& other) = delete;
-  auto args() const -> const T* { return args_ + 1; }
-  auto named_args() -> named_arg_info<Char>* { return named_args_; }
-};
-
-template <typename T, typename Char, size_t NUM_ARGS>
-struct arg_data<T, Char, NUM_ARGS, 0> {
-  // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
-  T args_[NUM_ARGS != 0 ? NUM_ARGS : +1];
-
-  template <typename... U>
-  FMT_CONSTEXPR FMT_INLINE arg_data(const U&... init) : args_{init...} {}
-  FMT_CONSTEXPR FMT_INLINE auto args() const -> const T* { return args_; }
-  FMT_CONSTEXPR FMT_INLINE auto named_args() -> std::nullptr_t {
-    return nullptr;
-  }
-};
-
-template <typename Char>
-inline void init_named_args(named_arg_info<Char>*, int, int) {}
-
-template <typename T> struct is_named_arg : std::false_type {};
-template <typename T> struct is_statically_named_arg : std::false_type {};
-
-template <typename T, typename Char>
-struct is_named_arg<named_arg<Char, T>> : std::true_type {};
-
-template <typename Char, typename T, typename... Tail,
-          FMT_ENABLE_IF(!is_named_arg<T>::value)>
-void init_named_args(named_arg_info<Char>* named_args, int arg_count,
-                     int named_arg_count, const T&, const Tail&... args) {
-  init_named_args(named_args, arg_count + 1, named_arg_count, args...);
-}
-
-template <typename Char, typename T, typename... Tail,
-          FMT_ENABLE_IF(is_named_arg<T>::value)>
-void init_named_args(named_arg_info<Char>* named_args, int arg_count,
-                     int named_arg_count, const T& arg, const Tail&... args) {
-  named_args[named_arg_count++] = {arg.name, arg_count};
-  init_named_args(named_args, arg_count + 1, named_arg_count, args...);
-}
-
-template <typename... Args>
-FMT_CONSTEXPR FMT_INLINE void init_named_args(std::nullptr_t, int, int,
-                                              const Args&...) {}
-
-template <bool B = false> constexpr auto count() -> size_t { return B ? 1 : 0; }
-template <bool B1, bool B2, bool... Tail> constexpr auto count() -> size_t {
-  return (B1 ? 1 : 0) + count<B2, Tail...>();
-}
-
-template <typename... Args> constexpr auto count_named_args() -> size_t {
-  return count<is_named_arg<Args>::value...>();
-}
-
-template <typename... Args>
-constexpr auto count_statically_named_args() -> size_t {
-  return count<is_statically_named_arg<Args>::value...>();
-}
-
-enum class type {
-  none_type,
-  // Integer types should go first,
-  int_type,
-  uint_type,
-  long_long_type,
-  ulong_long_type,
-  int128_type,
-  uint128_type,
-  bool_type,
-  char_type,
-  last_integer_type = char_type,
-  // followed by floating-point types.
-  float_type,
-  double_type,
-  long_double_type,
-  last_numeric_type = long_double_type,
-  cstring_type,
-  string_type,
-  pointer_type,
-  custom_type
-};
-
-// Maps core type T to the corresponding type enum constant.
-template <typename T, typename Char>
-struct type_constant : std::integral_constant<type, type::custom_type> {};
-
-#define FMT_TYPE_CONSTANT(Type, constant) \
-  template <typename Char>                \
-  struct type_constant<Type, Char>        \
-      : std::integral_constant<type, type::constant> {}
-
-FMT_TYPE_CONSTANT(int, int_type);
-FMT_TYPE_CONSTANT(unsigned, uint_type);
-FMT_TYPE_CONSTANT(long long, long_long_type);
-FMT_TYPE_CONSTANT(unsigned long long, ulong_long_type);
-FMT_TYPE_CONSTANT(int128_t, int128_type);
-FMT_TYPE_CONSTANT(uint128_t, uint128_type);
-FMT_TYPE_CONSTANT(bool, bool_type);
-FMT_TYPE_CONSTANT(Char, char_type);
-FMT_TYPE_CONSTANT(float, float_type);
-FMT_TYPE_CONSTANT(double, double_type);
-FMT_TYPE_CONSTANT(long double, long_double_type);
-FMT_TYPE_CONSTANT(const Char*, cstring_type);
-FMT_TYPE_CONSTANT(basic_string_view<Char>, string_type);
-FMT_TYPE_CONSTANT(const void*, pointer_type);
-
-constexpr bool is_integral_type(type t) {
-  return t > type::none_type && t <= type::last_integer_type;
-}
-
-constexpr bool is_arithmetic_type(type t) {
-  return t > type::none_type && t <= type::last_numeric_type;
-}
-
-struct unformattable {};
-struct unformattable_char : unformattable {};
-struct unformattable_const : unformattable {};
-struct unformattable_pointer : unformattable {};
-
-template <typename Char> struct string_value {
-  const Char* data;
-  size_t size;
-};
-
-template <typename Char> struct named_arg_value {
-  const named_arg_info<Char>* data;
-  size_t size;
-};
-
-template <typename Context> struct custom_value {
-  using parse_context = typename Context::parse_context_type;
-  void* value;
-  void (*format)(void* arg, parse_context& parse_ctx, Context& ctx);
-};
-
-// A formatting argument value.
-template <typename Context> class value {
- public:
-  using char_type = typename Context::char_type;
-
-  union {
-    monostate no_value;
-    int int_value;
-    unsigned uint_value;
-    long long long_long_value;
-    unsigned long long ulong_long_value;
-    int128_t int128_value;
-    uint128_t uint128_value;
-    bool bool_value;
-    char_type char_value;
-    float float_value;
-    double double_value;
-    long double long_double_value;
-    const void* pointer;
-    string_value<char_type> string;
-    custom_value<Context> custom;
-    named_arg_value<char_type> named_args;
-  };
-
-  constexpr FMT_INLINE value() : no_value() {}
-  constexpr FMT_INLINE value(int val) : int_value(val) {}
-  constexpr FMT_INLINE value(unsigned val) : uint_value(val) {}
-  constexpr FMT_INLINE value(long long val) : long_long_value(val) {}
-  constexpr FMT_INLINE value(unsigned long long val) : ulong_long_value(val) {}
-  FMT_INLINE value(int128_t val) : int128_value(val) {}
-  FMT_INLINE value(uint128_t val) : uint128_value(val) {}
-  constexpr FMT_INLINE value(float val) : float_value(val) {}
-  constexpr FMT_INLINE value(double val) : double_value(val) {}
-  FMT_INLINE value(long double val) : long_double_value(val) {}
-  constexpr FMT_INLINE value(bool val) : bool_value(val) {}
-  constexpr FMT_INLINE value(char_type val) : char_value(val) {}
-  FMT_CONSTEXPR FMT_INLINE value(const char_type* val) {
-    string.data = val;
-    if (is_constant_evaluated()) string.size = {};
-  }
-  FMT_CONSTEXPR FMT_INLINE value(basic_string_view<char_type> val) {
-    string.data = val.data();
-    string.size = val.size();
-  }
-  FMT_INLINE value(const void* val) : pointer(val) {}
-  FMT_INLINE value(const named_arg_info<char_type>* args, size_t size)
-      : named_args{args, size} {}
-
-  template <typename T> FMT_CONSTEXPR FMT_INLINE value(T& val) {
-    using value_type = remove_cvref_t<T>;
-    custom.value = const_cast<value_type*>(&val);
-    // Get the formatter type through the context to allow different contexts
-    // have different extension points, e.g. `formatter<T>` for `format` and
-    // `printf_formatter<T>` for `printf`.
-    custom.format = format_custom_arg<
-        value_type,
-        conditional_t<has_formatter<value_type, Context>::value,
-                      typename Context::template formatter_type<value_type>,
-                      fallback_formatter<value_type, char_type>>>;
-  }
-  value(unformattable);
-  value(unformattable_char);
-  value(unformattable_const);
-  value(unformattable_pointer);
-
- private:
-  // Formats an argument of a custom type, such as a user-defined class.
-  template <typename T, typename Formatter>
-  static void format_custom_arg(void* arg,
-                                typename Context::parse_context_type& parse_ctx,
-                                Context& ctx) {
-    auto f = Formatter();
-    parse_ctx.advance_to(f.parse(parse_ctx));
-    using qualified_type =
-        conditional_t<has_const_formatter<T, Context>(), const T, T>;
-    ctx.advance_to(f.format(*static_cast<qualified_type*>(arg), ctx));
-  }
-};
-
-template <typename Context, typename T>
-FMT_CONSTEXPR auto make_arg(const T& value) -> basic_format_arg<Context>;
-
-// To minimize the number of types we need to deal with, long is translated
-// either to int or to long long depending on its size.
-enum { long_short = sizeof(long) == sizeof(int) };
-using long_type = conditional_t<long_short, int, long long>;
-using ulong_type = conditional_t<long_short, unsigned, unsigned long long>;
-
-// Maps formatting arguments to core types.
-// arg_mapper reports errors by returning unformattable instead of using
-// static_assert because it's used in the is_formattable trait.
-template <typename Context> struct arg_mapper {
-  using char_type = typename Context::char_type;
-
-  FMT_CONSTEXPR FMT_INLINE auto map(signed char val) -> int { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(unsigned char val) -> unsigned {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(short val) -> int { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(unsigned short val) -> unsigned {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(int val) -> int { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(unsigned val) -> unsigned { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(long val) -> long_type { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(unsigned long val) -> ulong_type {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(long long val) -> long long { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(unsigned long long val)
-      -> unsigned long long {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(int128_t val) -> int128_t { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(uint128_t val) -> uint128_t { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(bool val) -> bool { return val; }
-
-  template <typename T, FMT_ENABLE_IF(std::is_same<T, char>::value ||
-                                      std::is_same<T, char_type>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(T val) -> char_type {
-    return val;
-  }
-  template <typename T, enable_if_t<(std::is_same<T, wchar_t>::value ||
-#ifdef __cpp_char8_t
-                                     std::is_same<T, char8_t>::value ||
-#endif
-                                     std::is_same<T, char16_t>::value ||
-                                     std::is_same<T, char32_t>::value) &&
-                                        !std::is_same<T, char_type>::value,
-                                    int> = 0>
-  FMT_CONSTEXPR FMT_INLINE auto map(T) -> unformattable_char {
-    return {};
-  }
-
-  FMT_CONSTEXPR FMT_INLINE auto map(float val) -> float { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(double val) -> double { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(long double val) -> long double {
-    return val;
-  }
-
-  FMT_CONSTEXPR FMT_INLINE auto map(char_type* val) -> const char_type* {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(const char_type* val) -> const char_type* {
-    return val;
-  }
-  template <typename T,
-            FMT_ENABLE_IF(is_string<T>::value && !std::is_pointer<T>::value &&
-                          std::is_same<char_type, char_t<T>>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
-      -> basic_string_view<char_type> {
-    return to_string_view(val);
-  }
-  template <typename T,
-            FMT_ENABLE_IF(is_string<T>::value && !std::is_pointer<T>::value &&
-                          !std::is_same<char_type, char_t<T>>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(const T&) -> unformattable_char {
-    return {};
-  }
-  template <typename T,
-            FMT_ENABLE_IF(
-                std::is_constructible<basic_string_view<char_type>, T>::value &&
-                !is_string<T>::value && !has_formatter<T, Context>::value &&
-                !has_fallback_formatter<T, char_type>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
-      -> basic_string_view<char_type> {
-    return basic_string_view<char_type>(val);
-  }
-  template <
-      typename T,
-      FMT_ENABLE_IF(
-          std::is_constructible<std_string_view<char_type>, T>::value &&
-          !std::is_constructible<basic_string_view<char_type>, T>::value &&
-          !is_string<T>::value && !has_formatter<T, Context>::value &&
-          !has_fallback_formatter<T, char_type>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
-      -> basic_string_view<char_type> {
-    return std_string_view<char_type>(val);
-  }
-
-  using cstring_result = conditional_t<std::is_same<char_type, char>::value,
-                                       const char*, unformattable_pointer>;
-
-  FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(const signed char* val)
-      -> cstring_result {
-    return map(reinterpret_cast<const char*>(val));
-  }
-  FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(const unsigned char* val)
-      -> cstring_result {
-    return map(reinterpret_cast<const char*>(val));
-  }
-  FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(signed char* val)
-      -> cstring_result {
-    return map(reinterpret_cast<const char*>(val));
-  }
-  FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(unsigned char* val)
-      -> cstring_result {
-    return map(reinterpret_cast<const char*>(val));
-  }
-
-  FMT_CONSTEXPR FMT_INLINE auto map(void* val) -> const void* { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(const void* val) -> const void* {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(std::nullptr_t val) -> const void* {
-    return val;
-  }
-
-  // We use SFINAE instead of a const T* parameter to avoid conflicting with
-  // the C array overload.
-  template <
-      typename T,
-      FMT_ENABLE_IF(
-          std::is_member_pointer<T>::value ||
-          std::is_function<typename std::remove_pointer<T>::type>::value ||
-          (std::is_convertible<const T&, const void*>::value &&
-           !std::is_convertible<const T&, const char_type*>::value))>
-  FMT_CONSTEXPR auto map(const T&) -> unformattable_pointer {
-    return {};
-  }
-
-  template <typename T, std::size_t N,
-            FMT_ENABLE_IF(!std::is_same<T, wchar_t>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(const T (&values)[N]) -> const T (&)[N] {
-    return values;
-  }
-
-  template <typename T,
-            FMT_ENABLE_IF(
-                std::is_enum<T>::value&& std::is_convertible<T, int>::value &&
-                !has_formatter<T, Context>::value &&
-                !has_fallback_formatter<T, char_type>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
-      -> decltype(std::declval<arg_mapper>().map(
-          static_cast<typename std::underlying_type<T>::type>(val))) {
-    return map(static_cast<typename std::underlying_type<T>::type>(val));
-  }
-
-  FMT_CONSTEXPR FMT_INLINE auto map(detail::byte val) -> unsigned {
-    return map(static_cast<unsigned char>(val));
-  }
-
-  template <typename T, typename U = remove_cvref_t<T>>
-  struct formattable
-      : bool_constant<has_const_formatter<U, Context>() ||
-                      !std::is_const<remove_reference_t<T>>::value ||
-                      has_fallback_formatter<U, char_type>::value> {};
-
-#if FMT_MSC_VER != 0 && FMT_MSC_VER < 1910
-  // Workaround a bug in MSVC.
-  template <typename T> FMT_CONSTEXPR FMT_INLINE auto do_map(T&& val) -> T& {
-    return val;
-  }
-#else
-  template <typename T, FMT_ENABLE_IF(formattable<T>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto do_map(T&& val) -> T& {
-    return val;
-  }
-  template <typename T, FMT_ENABLE_IF(!formattable<T>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto do_map(T&&) -> unformattable_const {
-    return {};
-  }
-#endif
-
-  template <typename T, typename U = remove_cvref_t<T>,
-            FMT_ENABLE_IF(!is_string<U>::value && !is_char<U>::value &&
-                          !std::is_array<U>::value &&
-                          (has_formatter<U, Context>::value ||
-                           has_fallback_formatter<U, char_type>::value))>
-  FMT_CONSTEXPR FMT_INLINE auto map(T&& val)
-      -> decltype(this->do_map(std::forward<T>(val))) {
-    return do_map(std::forward<T>(val));
-  }
-
-  template <typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(const T& named_arg)
-      -> decltype(std::declval<arg_mapper>().map(named_arg.value)) {
-    return map(named_arg.value);
-  }
-
-  auto map(...) -> unformattable { return {}; }
-};
-
-// A type constant after applying arg_mapper<Context>.
-template <typename T, typename Context>
-using mapped_type_constant =
-    type_constant<decltype(arg_mapper<Context>().map(std::declval<const T&>())),
-                  typename Context::char_type>;
-
-enum { packed_arg_bits = 4 };
-// Maximum number of arguments with packed types.
-enum { max_packed_args = 62 / packed_arg_bits };
-enum : unsigned long long { is_unpacked_bit = 1ULL << 63 };
-enum : unsigned long long { has_named_args_bit = 1ULL << 62 };
-
-FMT_END_DETAIL_NAMESPACE
-
-// An output iterator that appends to a buffer.
-// It is used to reduce symbol sizes for the common case.
-class appender : public std::back_insert_iterator<detail::buffer<char>> {
-  using base = std::back_insert_iterator<detail::buffer<char>>;
-
-  template <typename T>
-  friend auto get_buffer(appender out) -> detail::buffer<char>& {
-    return detail::get_container(out);
-  }
-
- public:
-  using std::back_insert_iterator<detail::buffer<char>>::back_insert_iterator;
-  appender(base it) FMT_NOEXCEPT : base(it) {}
-  using _Unchecked_type = appender;  // Mark iterator as checked.
-
-  auto operator++() FMT_NOEXCEPT -> appender& { return *this; }
-
-  auto operator++(int) FMT_NOEXCEPT -> appender { return *this; }
-};
-
-// A formatting argument. It is a trivially copyable/constructible type to
-// allow storage in basic_memory_buffer.
-template <typename Context> class basic_format_arg {
- private:
-  detail::value<Context> value_;
-  detail::type type_;
-
-  template <typename ContextType, typename T>
-  friend FMT_CONSTEXPR auto detail::make_arg(const T& value)
-      -> basic_format_arg<ContextType>;
-
-  template <typename Visitor, typename Ctx>
-  friend FMT_CONSTEXPR auto visit_format_arg(Visitor&& vis,
-                                             const basic_format_arg<Ctx>& arg)
-      -> decltype(vis(0));
-
-  friend class basic_format_args<Context>;
-  friend class dynamic_format_arg_store<Context>;
-
-  using char_type = typename Context::char_type;
-
-  template <typename T, typename Char, size_t NUM_ARGS, size_t NUM_NAMED_ARGS>
-  friend struct detail::arg_data;
-
-  basic_format_arg(const detail::named_arg_info<char_type>* args, size_t size)
-      : value_(args, size) {}
-
- public:
-  class handle {
-   public:
-    explicit handle(detail::custom_value<Context> custom) : custom_(custom) {}
-
-    void format(typename Context::parse_context_type& parse_ctx,
-                Context& ctx) const {
-      custom_.format(custom_.value, parse_ctx, ctx);
-    }
-
-   private:
-    detail::custom_value<Context> custom_;
-  };
-
-  constexpr basic_format_arg() : type_(detail::type::none_type) {}
-
-  constexpr explicit operator bool() const FMT_NOEXCEPT {
-    return type_ != detail::type::none_type;
-  }
-
-  auto type() const -> detail::type { return type_; }
-
-  auto is_integral() const -> bool { return detail::is_integral_type(type_); }
-  auto is_arithmetic() const -> bool {
-    return detail::is_arithmetic_type(type_);
-  }
-};
-
-/**
-  \rst
-  Visits an argument dispatching to the appropriate visit method based on
-  the argument type. For example, if the argument type is ``double`` then
-  ``vis(value)`` will be called with the value of type ``double``.
-  \endrst
- */
-template <typename Visitor, typename Context>
-FMT_CONSTEXPR FMT_INLINE auto visit_format_arg(
-    Visitor&& vis, const basic_format_arg<Context>& arg) -> decltype(vis(0)) {
-  switch (arg.type_) {
-  case detail::type::none_type:
-    break;
-  case detail::type::int_type:
-    return vis(arg.value_.int_value);
-  case detail::type::uint_type:
-    return vis(arg.value_.uint_value);
-  case detail::type::long_long_type:
-    return vis(arg.value_.long_long_value);
-  case detail::type::ulong_long_type:
-    return vis(arg.value_.ulong_long_value);
-  case detail::type::int128_type:
-    return vis(detail::convert_for_visit(arg.value_.int128_value));
-  case detail::type::uint128_type:
-    return vis(detail::convert_for_visit(arg.value_.uint128_value));
-  case detail::type::bool_type:
-    return vis(arg.value_.bool_value);
-  case detail::type::char_type:
-    return vis(arg.value_.char_value);
-  case detail::type::float_type:
-    return vis(arg.value_.float_value);
-  case detail::type::double_type:
-    return vis(arg.value_.double_value);
-  case detail::type::long_double_type:
-    return vis(arg.value_.long_double_value);
-  case detail::type::cstring_type:
-    return vis(arg.value_.string.data);
-  case detail::type::string_type:
-    using sv = basic_string_view<typename Context::char_type>;
-    return vis(sv(arg.value_.string.data, arg.value_.string.size));
-  case detail::type::pointer_type:
-    return vis(arg.value_.pointer);
-  case detail::type::custom_type:
-    return vis(typename basic_format_arg<Context>::handle(arg.value_.custom));
-  }
-  return vis(monostate());
-}
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
-template <typename Char, typename InputIt>
-auto copy_str(InputIt begin, InputIt end, appender out) -> appender {
-  get_container(out).append(begin, end);
-  return out;
-}
-
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 500
-// A workaround for gcc 4.8 to make void_t work in a SFINAE context.
-template <typename... Ts> struct void_t_impl { using type = void; };
-template <typename... Ts>
-using void_t = typename detail::void_t_impl<Ts...>::type;
-#else
-template <typename...> using void_t = void;
-#endif
-
-template <typename It, typename T, typename Enable = void>
-struct is_output_iterator : std::false_type {};
-
-template <typename It, typename T>
-struct is_output_iterator<
-    It, T,
-    void_t<typename std::iterator_traits<It>::iterator_category,
-           decltype(*std::declval<It>() = std::declval<T>())>>
-    : std::true_type {};
-
-template <typename OutputIt>
-struct is_back_insert_iterator : std::false_type {};
-template <typename Container>
-struct is_back_insert_iterator<std::back_insert_iterator<Container>>
-    : std::true_type {};
-
-template <typename OutputIt>
-struct is_contiguous_back_insert_iterator : std::false_type {};
-template <typename Container>
-struct is_contiguous_back_insert_iterator<std::back_insert_iterator<Container>>
-    : is_contiguous<Container> {};
-template <>
-struct is_contiguous_back_insert_iterator<appender> : std::true_type {};
-
-// A type-erased reference to an std::locale to avoid heavy <locale> include.
-class locale_ref {
- private:
-  const void* locale_;  // A type-erased pointer to std::locale.
-
- public:
-  constexpr locale_ref() : locale_(nullptr) {}
-  template <typename Locale> explicit locale_ref(const Locale& loc);
-
-  explicit operator bool() const FMT_NOEXCEPT { return locale_ != nullptr; }
-
-  template <typename Locale> auto get() const -> Locale;
-};
-
-template <typename> constexpr auto encode_types() -> unsigned long long {
-  return 0;
-}
-
-template <typename Context, typename Arg, typename... Args>
-constexpr auto encode_types() -> unsigned long long {
-  return static_cast<unsigned>(mapped_type_constant<Arg, Context>::value) |
-         (encode_types<Context, Args...>() << packed_arg_bits);
-}
-
-template <typename Context, typename T>
-FMT_CONSTEXPR auto make_arg(const T& value) -> basic_format_arg<Context> {
-  basic_format_arg<Context> arg;
-  arg.type_ = mapped_type_constant<T, Context>::value;
-  arg.value_ = arg_mapper<Context>().map(value);
-  return arg;
-}
-
-// The type template parameter is there to avoid an ODR violation when using
-// a fallback formatter in one translation unit and an implicit conversion in
-// another (not recommended).
-template <bool IS_PACKED, typename Context, type, typename T,
-          FMT_ENABLE_IF(IS_PACKED)>
-FMT_CONSTEXPR FMT_INLINE auto make_arg(T&& val) -> value<Context> {
-  const auto& arg = arg_mapper<Context>().map(std::forward<T>(val));
-
-  constexpr bool formattable_char =
-      !std::is_same<decltype(arg), const unformattable_char&>::value;
-  static_assert(formattable_char, "Mixing character types is disallowed.");
-
-  constexpr bool formattable_const =
-      !std::is_same<decltype(arg), const unformattable_const&>::value;
-  static_assert(formattable_const, "Cannot format a const argument.");
-
-  // Formatting of arbitrary pointers is disallowed. If you want to output
-  // a pointer cast it to "void *" or "const void *". In particular, this
-  // forbids formatting of "[const] volatile char *" which is printed as bool
-  // by iostreams.
-  constexpr bool formattable_pointer =
-      !std::is_same<decltype(arg), const unformattable_pointer&>::value;
-  static_assert(formattable_pointer,
-                "Formatting of non-void pointers is disallowed.");
-
-  constexpr bool formattable =
-      !std::is_same<decltype(arg), const unformattable&>::value;
-  static_assert(
-      formattable,
-      "Cannot format an argument. To make type T formattable provide a "
-      "formatter<T> specialization: https://fmt.dev/latest/api.html#udt");
-  return {arg};
-}
-
-template <bool IS_PACKED, typename Context, type, typename T,
-          FMT_ENABLE_IF(!IS_PACKED)>
-inline auto make_arg(const T& value) -> basic_format_arg<Context> {
-  return make_arg<Context>(value);
-}
-FMT_END_DETAIL_NAMESPACE
-
-// Formatting context.
-template <typename OutputIt, typename Char> class basic_format_context {
- public:
-  /** The character type for the output. */
-  using char_type = Char;
-
- private:
-  OutputIt out_;
-  basic_format_args<basic_format_context> args_;
-  detail::locale_ref loc_;
-
- public:
-  using iterator = OutputIt;
-  using format_arg = basic_format_arg<basic_format_context>;
-  using parse_context_type = basic_format_parse_context<Char>;
-  template <typename T> using formatter_type = formatter<T, char_type>;
-
-  basic_format_context(basic_format_context&&) = default;
-  basic_format_context(const basic_format_context&) = delete;
-  void operator=(const basic_format_context&) = delete;
-  /**
-   Constructs a ``basic_format_context`` object. References to the arguments are
-   stored in the object so make sure they have appropriate lifetimes.
-   */
-  constexpr basic_format_context(
-      OutputIt out, basic_format_args<basic_format_context> ctx_args,
-      detail::locale_ref loc = detail::locale_ref())
-      : out_(out), args_(ctx_args), loc_(loc) {}
-
-  constexpr auto arg(int id) const -> format_arg { return args_.get(id); }
-  FMT_CONSTEXPR auto arg(basic_string_view<char_type> name) -> format_arg {
-    return args_.get(name);
-  }
-  FMT_CONSTEXPR auto arg_id(basic_string_view<char_type> name) -> int {
-    return args_.get_id(name);
-  }
-  auto args() const -> const basic_format_args<basic_format_context>& {
-    return args_;
-  }
-
-  FMT_CONSTEXPR auto error_handler() -> detail::error_handler { return {}; }
-  void on_error(const char* message) { error_handler().on_error(message); }
-
-  // Returns an iterator to the beginning of the output range.
-  FMT_CONSTEXPR auto out() -> iterator { return out_; }
-
-  // Advances the begin iterator to ``it``.
-  void advance_to(iterator it) {
-    if (!detail::is_back_insert_iterator<iterator>()) out_ = it;
-  }
-
-  FMT_CONSTEXPR auto locale() -> detail::locale_ref { return loc_; }
-};
-
-template <typename Char>
-using buffer_context =
-    basic_format_context<detail::buffer_appender<Char>, Char>;
-using format_context = buffer_context<char>;
-
-// Workaround an alias issue: https://stackoverflow.com/q/62767544/471164.
-#define FMT_BUFFER_CONTEXT(Char) \
-  basic_format_context<detail::buffer_appender<Char>, Char>
-
-template <typename T, typename Char = char>
-using is_formattable = bool_constant<
-    !std::is_base_of<detail::unformattable,
-                     decltype(detail::arg_mapper<buffer_context<Char>>().map(
-                         std::declval<T>()))>::value &&
-    !detail::has_fallback_formatter<T, Char>::value>;
-
-/**
-  \rst
-  An array of references to arguments. It can be implicitly converted into
-  `~fmt::basic_format_args` for passing into type-erased formatting functions
-  such as `~fmt::vformat`.
-  \endrst
- */
-template <typename Context, typename... Args>
-class format_arg_store
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-    // Workaround a GCC template argument substitution bug.
-    : public basic_format_args<Context>
-#endif
-{
- private:
-  static const size_t num_args = sizeof...(Args);
-  static const size_t num_named_args = detail::count_named_args<Args...>();
-  static const bool is_packed = num_args <= detail::max_packed_args;
-
-  using value_type = conditional_t<is_packed, detail::value<Context>,
-                                   basic_format_arg<Context>>;
-
-  detail::arg_data<value_type, typename Context::char_type, num_args,
-                   num_named_args>
-      data_;
-
-  friend class basic_format_args<Context>;
-
-  static constexpr unsigned long long desc =
-      (is_packed ? detail::encode_types<Context, Args...>()
-                 : detail::is_unpacked_bit | num_args) |
-      (num_named_args != 0
-           ? static_cast<unsigned long long>(detail::has_named_args_bit)
-           : 0);
-
- public:
-  template <typename... T>
-  FMT_CONSTEXPR FMT_INLINE format_arg_store(T&&... args)
-      :
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-        basic_format_args<Context>(*this),
-#endif
-        data_{detail::make_arg<
-            is_packed, Context,
-            detail::mapped_type_constant<remove_cvref_t<T>, Context>::value>(
-            std::forward<T>(args))...} {
-    detail::init_named_args(data_.named_args(), 0, 0, args...);
-  }
-};
-
-/**
-  \rst
-  Constructs a `~fmt::format_arg_store` object that contains references to
-  arguments and can be implicitly converted to `~fmt::format_args`. `Context`
-  can be omitted in which case it defaults to `~fmt::context`.
-  See `~fmt::arg` for lifetime considerations.
-  \endrst
- */
-template <typename Context = format_context, typename... Args>
-constexpr auto make_format_args(Args&&... args)
-    -> format_arg_store<Context, remove_cvref_t<Args>...> {
-  return {std::forward<Args>(args)...};
-}
-
-/**
-  \rst
-  Returns a named argument to be used in a formatting function.
-  It should only be used in a call to a formatting function or
-  `dynamic_format_arg_store::push_back`.
-
-  **Example**::
-
-    fmt::print("Elapsed time: {s:.2f} seconds", fmt::arg("s", 1.23));
-  \endrst
- */
-template <typename Char, typename T>
-inline auto arg(const Char* name, const T& arg) -> detail::named_arg<Char, T> {
-  static_assert(!detail::is_named_arg<T>(), "nested named arguments");
-  return {name, arg};
-}
-
-/**
-  \rst
-  A view of a collection of formatting arguments. To avoid lifetime issues it
-  should only be used as a parameter type in type-erased functions such as
-  ``vformat``::
-
-    void vlog(string_view format_str, format_args args);  // OK
-    format_args args = make_format_args(42);  // Error: dangling reference
-  \endrst
- */
-template <typename Context> class basic_format_args {
- public:
-  using size_type = int;
-  using format_arg = basic_format_arg<Context>;
-
- private:
-  // A descriptor that contains information about formatting arguments.
-  // If the number of arguments is less or equal to max_packed_args then
-  // argument types are passed in the descriptor. This reduces binary code size
-  // per formatting function call.
-  unsigned long long desc_;
-  union {
-    // If is_packed() returns true then argument values are stored in values_;
-    // otherwise they are stored in args_. This is done to improve cache
-    // locality and reduce compiled code size since storing larger objects
-    // may require more code (at least on x86-64) even if the same amount of
-    // data is actually copied to stack. It saves ~10% on the bloat test.
-    const detail::value<Context>* values_;
-    const format_arg* args_;
-  };
-
-  constexpr auto is_packed() const -> bool {
-    return (desc_ & detail::is_unpacked_bit) == 0;
-  }
-  auto has_named_args() const -> bool {
-    return (desc_ & detail::has_named_args_bit) != 0;
-  }
-
-  FMT_CONSTEXPR auto type(int index) const -> detail::type {
-    int shift = index * detail::packed_arg_bits;
-    unsigned int mask = (1 << detail::packed_arg_bits) - 1;
-    return static_cast<detail::type>((desc_ >> shift) & mask);
-  }
-
-  constexpr FMT_INLINE basic_format_args(unsigned long long desc,
-                                         const detail::value<Context>* values)
-      : desc_(desc), values_(values) {}
-  constexpr basic_format_args(unsigned long long desc, const format_arg* args)
-      : desc_(desc), args_(args) {}
-
- public:
-  constexpr basic_format_args() : desc_(0), args_(nullptr) {}
-
-  /**
-   \rst
-   Constructs a `basic_format_args` object from `~fmt::format_arg_store`.
-   \endrst
-   */
-  template <typename... Args>
-  constexpr FMT_INLINE basic_format_args(
-      const format_arg_store<Context, Args...>& store)
-      : basic_format_args(format_arg_store<Context, Args...>::desc,
-                          store.data_.args()) {}
-
-  /**
-   \rst
-   Constructs a `basic_format_args` object from
-   `~fmt::dynamic_format_arg_store`.
-   \endrst
-   */
-  constexpr FMT_INLINE basic_format_args(
-      const dynamic_format_arg_store<Context>& store)
-      : basic_format_args(store.get_types(), store.data()) {}
-
-  /**
-   \rst
-   Constructs a `basic_format_args` object from a dynamic set of arguments.
-   \endrst
-   */
-  constexpr basic_format_args(const format_arg* args, int count)
-      : basic_format_args(detail::is_unpacked_bit | detail::to_unsigned(count),
-                          args) {}
-
-  /** Returns the argument with the specified id. */
-  FMT_CONSTEXPR auto get(int id) const -> format_arg {
-    format_arg arg;
-    if (!is_packed()) {
-      if (id < max_size()) arg = args_[id];
-      return arg;
-    }
-    if (id >= detail::max_packed_args) return arg;
-    arg.type_ = type(id);
-    if (arg.type_ == detail::type::none_type) return arg;
-    arg.value_ = values_[id];
-    return arg;
-  }
-
-  template <typename Char>
-  auto get(basic_string_view<Char> name) const -> format_arg {
-    int id = get_id(name);
-    return id >= 0 ? get(id) : format_arg();
-  }
-
-  template <typename Char>
-  auto get_id(basic_string_view<Char> name) const -> int {
-    if (!has_named_args()) return -1;
-    const auto& named_args =
-        (is_packed() ? values_[-1] : args_[-1].value_).named_args;
-    for (size_t i = 0; i < named_args.size; ++i) {
-      if (named_args.data[i].name == name) return named_args.data[i].id;
-    }
-    return -1;
-  }
-
-  auto max_size() const -> int {
-    unsigned long long max_packed = detail::max_packed_args;
-    return static_cast<int>(is_packed() ? max_packed
-                                        : desc_ & ~detail::is_unpacked_bit);
-  }
-};
-
-/** An alias to ``basic_format_args<format_context>``. */
-// A separate type would result in shorter symbols but break ABI compatibility
-// between clang and gcc on ARM (#1919).
-using format_args = basic_format_args<format_context>;
-
-// We cannot use enum classes as bit fields because of a gcc bug
-// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414.
-namespace align {
-enum type { none, left, right, center, numeric };
-}
-using align_t = align::type;
-namespace sign {
-enum type { none, minus, plus, space };
-}
-using sign_t = sign::type;
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
-// Workaround an array initialization issue in gcc 4.8.
-template <typename Char> struct fill_t {
- private:
-  enum { max_size = 4 };
-  Char data_[max_size] = {Char(' '), Char(0), Char(0), Char(0)};
-  unsigned char size_ = 1;
-
- public:
-  FMT_CONSTEXPR void operator=(basic_string_view<Char> s) {
-    auto size = s.size();
-    if (size > max_size) return throw_format_error("invalid fill");
-    for (size_t i = 0; i < size; ++i) data_[i] = s[i];
-    size_ = static_cast<unsigned char>(size);
-  }
-
-  constexpr auto size() const -> size_t { return size_; }
-  constexpr auto data() const -> const Char* { return data_; }
-
-  FMT_CONSTEXPR auto operator[](size_t index) -> Char& { return data_[index]; }
-  FMT_CONSTEXPR auto operator[](size_t index) const -> const Char& {
-    return data_[index];
-  }
-};
-FMT_END_DETAIL_NAMESPACE
-
-enum class presentation_type : unsigned char {
-  none,
-  // Integer types should go first,
-  dec,             // 'd'
-  oct,             // 'o'
-  hex_lower,       // 'x'
-  hex_upper,       // 'X'
-  bin_lower,       // 'b'
-  bin_upper,       // 'B'
-  hexfloat_lower,  // 'a'
-  hexfloat_upper,  // 'A'
-  exp_lower,       // 'e'
-  exp_upper,       // 'E'
-  fixed_lower,     // 'f'
-  fixed_upper,     // 'F'
-  general_lower,   // 'g'
-  general_upper,   // 'G'
-  chr,             // 'c'
-  string,          // 's'
-  pointer          // 'p'
-};
-
-// Format specifiers for built-in and string types.
-template <typename Char> struct basic_format_specs {
-  int width;
-  int precision;
-  presentation_type type;
-  align_t align : 4;
-  sign_t sign : 3;
-  bool alt : 1;  // Alternate form ('#').
-  bool localized : 1;
-  detail::fill_t<Char> fill;
-
-  constexpr basic_format_specs()
-      : width(0),
-        precision(-1),
-        type(presentation_type::none),
-        align(align::none),
-        sign(sign::none),
-        alt(false),
-        localized(false) {}
-};
-
-using format_specs = basic_format_specs<char>;
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
-enum class arg_id_kind { none, index, name };
-
-// An argument reference.
-template <typename Char> struct arg_ref {
-  FMT_CONSTEXPR arg_ref() : kind(arg_id_kind::none), val() {}
-
-  FMT_CONSTEXPR explicit arg_ref(int index)
-      : kind(arg_id_kind::index), val(index) {}
-  FMT_CONSTEXPR explicit arg_ref(basic_string_view<Char> name)
-      : kind(arg_id_kind::name), val(name) {}
-
-  FMT_CONSTEXPR auto operator=(int idx) -> arg_ref& {
-    kind = arg_id_kind::index;
-    val.index = idx;
-    return *this;
-  }
-
-  arg_id_kind kind;
-  union value {
-    FMT_CONSTEXPR value(int id = 0) : index{id} {}
-    FMT_CONSTEXPR value(basic_string_view<Char> n) : name(n) {}
-
-    int index;
-    basic_string_view<Char> name;
-  } val;
-};
-
-// Format specifiers with width and precision resolved at formatting rather
-// than parsing time to allow re-using the same parsed specifiers with
-// different sets of arguments (precompilation of format strings).
-template <typename Char>
-struct dynamic_format_specs : basic_format_specs<Char> {
-  arg_ref<Char> width_ref;
-  arg_ref<Char> precision_ref;
-};
-
-struct auto_id {};
-
-// A format specifier handler that sets fields in basic_format_specs.
-template <typename Char> class specs_setter {
- protected:
-  basic_format_specs<Char>& specs_;
-
- public:
-  explicit FMT_CONSTEXPR specs_setter(basic_format_specs<Char>& specs)
-      : specs_(specs) {}
-
-  FMT_CONSTEXPR specs_setter(const specs_setter& other)
-      : specs_(other.specs_) {}
-
-  FMT_CONSTEXPR void on_align(align_t align) { specs_.align = align; }
-  FMT_CONSTEXPR void on_fill(basic_string_view<Char> fill) {
-    specs_.fill = fill;
-  }
-  FMT_CONSTEXPR void on_sign(sign_t s) { specs_.sign = s; }
-  FMT_CONSTEXPR void on_hash() { specs_.alt = true; }
-  FMT_CONSTEXPR void on_localized() { specs_.localized = true; }
-
-  FMT_CONSTEXPR void on_zero() {
-    if (specs_.align == align::none) specs_.align = align::numeric;
-    specs_.fill[0] = Char('0');
-  }
-
-  FMT_CONSTEXPR void on_width(int width) { specs_.width = width; }
-  FMT_CONSTEXPR void on_precision(int precision) {
-    specs_.precision = precision;
-  }
-  FMT_CONSTEXPR void end_precision() {}
-
-  FMT_CONSTEXPR void on_type(presentation_type type) { specs_.type = type; }
-};
-
-// Format spec handler that saves references to arguments representing dynamic
-// width and precision to be resolved at formatting time.
-template <typename ParseContext>
-class dynamic_specs_handler
-    : public specs_setter<typename ParseContext::char_type> {
- public:
-  using char_type = typename ParseContext::char_type;
-
-  FMT_CONSTEXPR dynamic_specs_handler(dynamic_format_specs<char_type>& specs,
-                                      ParseContext& ctx)
-      : specs_setter<char_type>(specs), specs_(specs), context_(ctx) {}
-
-  FMT_CONSTEXPR dynamic_specs_handler(const dynamic_specs_handler& other)
-      : specs_setter<char_type>(other),
-        specs_(other.specs_),
-        context_(other.context_) {}
-
-  template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
-    specs_.width_ref = make_arg_ref(arg_id);
-  }
-
-  template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
-    specs_.precision_ref = make_arg_ref(arg_id);
-  }
-
-  FMT_CONSTEXPR void on_error(const char* message) {
-    context_.on_error(message);
-  }
-
- private:
-  dynamic_format_specs<char_type>& specs_;
-  ParseContext& context_;
-
-  using arg_ref_type = arg_ref<char_type>;
-
-  FMT_CONSTEXPR auto make_arg_ref(int arg_id) -> arg_ref_type {
-    context_.check_arg_id(arg_id);
-    return arg_ref_type(arg_id);
-  }
-
-  FMT_CONSTEXPR auto make_arg_ref(auto_id) -> arg_ref_type {
-    return arg_ref_type(context_.next_arg_id());
-  }
-
-  FMT_CONSTEXPR auto make_arg_ref(basic_string_view<char_type> arg_id)
-      -> arg_ref_type {
-    context_.check_arg_id(arg_id);
-    basic_string_view<char_type> format_str(
-        context_.begin(), to_unsigned(context_.end() - context_.begin()));
-    return arg_ref_type(arg_id);
-  }
-};
-
-template <typename Char> constexpr bool is_ascii_letter(Char c) {
-  return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
-}
-
-// Converts a character to ASCII. Returns a number > 127 on conversion failure.
-template <typename Char, FMT_ENABLE_IF(std::is_integral<Char>::value)>
-constexpr auto to_ascii(Char value) -> Char {
-  return value;
-}
-template <typename Char, FMT_ENABLE_IF(std::is_enum<Char>::value)>
-constexpr auto to_ascii(Char value) ->
-    typename std::underlying_type<Char>::type {
-  return value;
-}
-
-template <typename Char>
-FMT_CONSTEXPR auto code_point_length(const Char* begin) -> int {
-  if (const_check(sizeof(Char) != 1)) return 1;
-  auto lengths =
-      "\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\0\0\0\0\0\0\0\0\2\2\2\2\3\3\4";
-  int len = lengths[static_cast<unsigned char>(*begin) >> 3];
-
-  // Compute the pointer to the next character early so that the next
-  // iteration can start working on the next character. Neither Clang
-  // nor GCC figure out this reordering on their own.
-  return len + !len;
-}
-
-// Return the result via the out param to workaround gcc bug 77539.
-template <bool IS_CONSTEXPR, typename T, typename Ptr = const T*>
-FMT_CONSTEXPR auto find(Ptr first, Ptr last, T value, Ptr& out) -> bool {
-  for (out = first; out != last; ++out) {
-    if (*out == value) return true;
-  }
-  return false;
-}
-
-template <>
-inline auto find<false, char>(const char* first, const char* last, char value,
-                              const char*& out) -> bool {
-  out = static_cast<const char*>(
-      std::memchr(first, value, to_unsigned(last - first)));
-  return out != nullptr;
-}
-
-// Parses the range [begin, end) as an unsigned integer. This function assumes
-// that the range is non-empty and the first character is a digit.
-template <typename Char>
-FMT_CONSTEXPR auto parse_nonnegative_int(const Char*& begin, const Char* end,
-                                         int error_value) noexcept -> int {
-  FMT_ASSERT(begin != end && '0' <= *begin && *begin <= '9', "");
-  unsigned value = 0, prev = 0;
-  auto p = begin;
-  do {
-    prev = value;
-    value = value * 10 + unsigned(*p - '0');
-    ++p;
-  } while (p != end && '0' <= *p && *p <= '9');
-  auto num_digits = p - begin;
-  begin = p;
-  if (num_digits <= std::numeric_limits<int>::digits10)
-    return static_cast<int>(value);
-  // Check for overflow.
-  const unsigned max = to_unsigned((std::numeric_limits<int>::max)());
-  return num_digits == std::numeric_limits<int>::digits10 + 1 &&
-                 prev * 10ull + unsigned(p[-1] - '0') <= max
-             ? static_cast<int>(value)
-             : error_value;
-}
-
-// Parses fill and alignment.
-template <typename Char, typename Handler>
-FMT_CONSTEXPR auto parse_align(const Char* begin, const Char* end,
-                               Handler&& handler) -> const Char* {
-  FMT_ASSERT(begin != end, "");
-  auto align = align::none;
-  auto p = begin + code_point_length(begin);
-  if (p >= end) p = begin;
-  for (;;) {
-    switch (to_ascii(*p)) {
-    case '<':
-      align = align::left;
-      break;
-    case '>':
-      align = align::right;
-      break;
-    case '^':
-      align = align::center;
-      break;
-    default:
-      break;
-    }
-    if (align != align::none) {
-      if (p != begin) {
-        auto c = *begin;
-        if (c == '{')
-          return handler.on_error("invalid fill character '{'"), begin;
-        handler.on_fill(basic_string_view<Char>(begin, to_unsigned(p - begin)));
-        begin = p + 1;
-      } else
-        ++begin;
-      handler.on_align(align);
-      break;
-    } else if (p == begin) {
-      break;
-    }
-    p = begin;
-  }
-  return begin;
-}
-
-template <typename Char> FMT_CONSTEXPR bool is_name_start(Char c) {
-  return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c;
-}
-
-template <typename Char, typename IDHandler>
-FMT_CONSTEXPR auto do_parse_arg_id(const Char* begin, const Char* end,
-                                   IDHandler&& handler) -> const Char* {
-  FMT_ASSERT(begin != end, "");
-  Char c = *begin;
-  if (c >= '0' && c <= '9') {
-    int index = 0;
-    if (c != '0')
-      index =
-          parse_nonnegative_int(begin, end, (std::numeric_limits<int>::max)());
-    else
-      ++begin;
-    if (begin == end || (*begin != '}' && *begin != ':'))
-      handler.on_error("invalid format string");
-    else
-      handler(index);
-    return begin;
-  }
-  if (!is_name_start(c)) {
-    handler.on_error("invalid format string");
-    return begin;
-  }
-  auto it = begin;
-  do {
-    ++it;
-  } while (it != end && (is_name_start(c = *it) || ('0' <= c && c <= '9')));
-  handler(basic_string_view<Char>(begin, to_unsigned(it - begin)));
-  return it;
-}
-
-template <typename Char, typename IDHandler>
-FMT_CONSTEXPR FMT_INLINE auto parse_arg_id(const Char* begin, const Char* end,
-                                           IDHandler&& handler) -> const Char* {
-  Char c = *begin;
-  if (c != '}' && c != ':') return do_parse_arg_id(begin, end, handler);
-  handler();
-  return begin;
-}
-
-template <typename Char, typename Handler>
-FMT_CONSTEXPR auto parse_width(const Char* begin, const Char* end,
-                               Handler&& handler) -> const Char* {
-  using detail::auto_id;
-  struct width_adapter {
-    Handler& handler;
-
-    FMT_CONSTEXPR void operator()() { handler.on_dynamic_width(auto_id()); }
-    FMT_CONSTEXPR void operator()(int id) { handler.on_dynamic_width(id); }
-    FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
-      handler.on_dynamic_width(id);
-    }
-    FMT_CONSTEXPR void on_error(const char* message) {
-      if (message) handler.on_error(message);
-    }
-  };
-
-  FMT_ASSERT(begin != end, "");
-  if ('0' <= *begin && *begin <= '9') {
-    int width = parse_nonnegative_int(begin, end, -1);
-    if (width != -1)
-      handler.on_width(width);
-    else
-      handler.on_error("number is too big");
-  } else if (*begin == '{') {
-    ++begin;
-    if (begin != end) begin = parse_arg_id(begin, end, width_adapter{handler});
-    if (begin == end || *begin != '}')
-      return handler.on_error("invalid format string"), begin;
-    ++begin;
-  }
-  return begin;
-}
-
-template <typename Char, typename Handler>
-FMT_CONSTEXPR auto parse_precision(const Char* begin, const Char* end,
-                                   Handler&& handler) -> const Char* {
-  using detail::auto_id;
-  struct precision_adapter {
-    Handler& handler;
-
-    FMT_CONSTEXPR void operator()() { handler.on_dynamic_precision(auto_id()); }
-    FMT_CONSTEXPR void operator()(int id) { handler.on_dynamic_precision(id); }
-    FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
-      handler.on_dynamic_precision(id);
-    }
-    FMT_CONSTEXPR void on_error(const char* message) {
-      if (message) handler.on_error(message);
-    }
-  };
-
-  ++begin;
-  auto c = begin != end ? *begin : Char();
-  if ('0' <= c && c <= '9') {
-    auto precision = parse_nonnegative_int(begin, end, -1);
-    if (precision != -1)
-      handler.on_precision(precision);
-    else
-      handler.on_error("number is too big");
-  } else if (c == '{') {
-    ++begin;
-    if (begin != end)
-      begin = parse_arg_id(begin, end, precision_adapter{handler});
-    if (begin == end || *begin++ != '}')
-      return handler.on_error("invalid format string"), begin;
-  } else {
-    return handler.on_error("missing precision specifier"), begin;
-  }
-  handler.end_precision();
-  return begin;
-}
-
-template <typename Char>
-FMT_CONSTEXPR auto parse_presentation_type(Char type) -> presentation_type {
-  switch (to_ascii(type)) {
-  case 'd':
-    return presentation_type::dec;
-  case 'o':
-    return presentation_type::oct;
-  case 'x':
-    return presentation_type::hex_lower;
-  case 'X':
-    return presentation_type::hex_upper;
-  case 'b':
-    return presentation_type::bin_lower;
-  case 'B':
-    return presentation_type::bin_upper;
-  case 'a':
-    return presentation_type::hexfloat_lower;
-  case 'A':
-    return presentation_type::hexfloat_upper;
-  case 'e':
-    return presentation_type::exp_lower;
-  case 'E':
-    return presentation_type::exp_upper;
-  case 'f':
-    return presentation_type::fixed_lower;
-  case 'F':
-    return presentation_type::fixed_upper;
-  case 'g':
-    return presentation_type::general_lower;
-  case 'G':
-    return presentation_type::general_upper;
-  case 'c':
-    return presentation_type::chr;
-  case 's':
-    return presentation_type::string;
-  case 'p':
-    return presentation_type::pointer;
-  default:
-    return presentation_type::none;
-  }
-}
-
-// Parses standard format specifiers and sends notifications about parsed
-// components to handler.
-template <typename Char, typename SpecHandler>
-FMT_CONSTEXPR FMT_INLINE auto parse_format_specs(const Char* begin,
-                                                 const Char* end,
-                                                 SpecHandler&& handler)
-    -> const Char* {
-  if (1 < end - begin && begin[1] == '}' && is_ascii_letter(*begin) &&
-      *begin != 'L') {
-    presentation_type type = parse_presentation_type(*begin++);
-    if (type == presentation_type::none)
-      handler.on_error("invalid type specifier");
-    handler.on_type(type);
-    return begin;
-  }
-
-  if (begin == end) return begin;
-
-  begin = parse_align(begin, end, handler);
-  if (begin == end) return begin;
-
-  // Parse sign.
-  switch (to_ascii(*begin)) {
-  case '+':
-    handler.on_sign(sign::plus);
-    ++begin;
-    break;
-  case '-':
-    handler.on_sign(sign::minus);
-    ++begin;
-    break;
-  case ' ':
-    handler.on_sign(sign::space);
-    ++begin;
-    break;
-  default:
-    break;
-  }
-  if (begin == end) return begin;
-
-  if (*begin == '#') {
-    handler.on_hash();
-    if (++begin == end) return begin;
-  }
-
-  // Parse zero flag.
-  if (*begin == '0') {
-    handler.on_zero();
-    if (++begin == end) return begin;
-  }
-
-  begin = parse_width(begin, end, handler);
-  if (begin == end) return begin;
-
-  // Parse precision.
-  if (*begin == '.') {
-    begin = parse_precision(begin, end, handler);
-    if (begin == end) return begin;
-  }
-
-  if (*begin == 'L') {
-    handler.on_localized();
-    ++begin;
-  }
-
-  // Parse type.
-  if (begin != end && *begin != '}') {
-    presentation_type type = parse_presentation_type(*begin++);
-    if (type == presentation_type::none)
-      handler.on_error("invalid type specifier");
-    handler.on_type(type);
-  }
-  return begin;
-}
-
-template <typename Char, typename Handler>
-FMT_CONSTEXPR auto parse_replacement_field(const Char* begin, const Char* end,
-                                           Handler&& handler) -> const Char* {
-  struct id_adapter {
-    Handler& handler;
-    int arg_id;
-
-    FMT_CONSTEXPR void operator()() { arg_id = handler.on_arg_id(); }
-    FMT_CONSTEXPR void operator()(int id) { arg_id = handler.on_arg_id(id); }
-    FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
-      arg_id = handler.on_arg_id(id);
-    }
-    FMT_CONSTEXPR void on_error(const char* message) {
-      if (message) handler.on_error(message);
-    }
-  };
-
-  ++begin;
-  if (begin == end) return handler.on_error("invalid format string"), end;
-  if (*begin == '}') {
-    handler.on_replacement_field(handler.on_arg_id(), begin);
-  } else if (*begin == '{') {
-    handler.on_text(begin, begin + 1);
-  } else {
-    auto adapter = id_adapter{handler, 0};
-    begin = parse_arg_id(begin, end, adapter);
-    Char c = begin != end ? *begin : Char();
-    if (c == '}') {
-      handler.on_replacement_field(adapter.arg_id, begin);
-    } else if (c == ':') {
-      begin = handler.on_format_specs(adapter.arg_id, begin + 1, end);
-      if (begin == end || *begin != '}')
-        return handler.on_error("unknown format specifier"), end;
-    } else {
-      return handler.on_error("missing '}' in format string"), end;
-    }
-  }
-  return begin + 1;
-}
-
-template <bool IS_CONSTEXPR, typename Char, typename Handler>
-FMT_CONSTEXPR FMT_INLINE void parse_format_string(
-    basic_string_view<Char> format_str, Handler&& handler) {
-  // Workaround a name-lookup bug in MSVC's modules implementation.
-  using detail::find;
-
-  auto begin = format_str.data();
-  auto end = begin + format_str.size();
-  if (end - begin < 32) {
-    // Use a simple loop instead of memchr for small strings.
-    const Char* p = begin;
-    while (p != end) {
-      auto c = *p++;
-      if (c == '{') {
-        handler.on_text(begin, p - 1);
-        begin = p = parse_replacement_field(p - 1, end, handler);
-      } else if (c == '}') {
-        if (p == end || *p != '}')
-          return handler.on_error("unmatched '}' in format string");
-        handler.on_text(begin, p);
-        begin = ++p;
-      }
-    }
-    handler.on_text(begin, end);
-    return;
-  }
-  struct writer {
-    FMT_CONSTEXPR void operator()(const Char* pbegin, const Char* pend) {
-      if (pbegin == pend) return;
-      for (;;) {
-        const Char* p = nullptr;
-        if (!find<IS_CONSTEXPR>(pbegin, pend, Char('}'), p))
-          return handler_.on_text(pbegin, pend);
-        ++p;
-        if (p == pend || *p != '}')
-          return handler_.on_error("unmatched '}' in format string");
-        handler_.on_text(pbegin, p);
-        pbegin = p + 1;
-      }
-    }
-    Handler& handler_;
-  } write{handler};
-  while (begin != end) {
-    // Doing two passes with memchr (one for '{' and another for '}') is up to
-    // 2.5x faster than the naive one-pass implementation on big format strings.
-    const Char* p = begin;
-    if (*begin != '{' && !find<IS_CONSTEXPR>(begin + 1, end, Char('{'), p))
-      return write(begin, end);
-    write(begin, p);
-    begin = parse_replacement_field(p, end, handler);
-  }
-}
-
-template <typename T, typename ParseContext>
-FMT_CONSTEXPR auto parse_format_specs(ParseContext& ctx)
-    -> decltype(ctx.begin()) {
-  using char_type = typename ParseContext::char_type;
-  using context = buffer_context<char_type>;
-  using mapped_type = conditional_t<
-      mapped_type_constant<T, context>::value != type::custom_type,
-      decltype(arg_mapper<context>().map(std::declval<const T&>())), T>;
-  auto f = conditional_t<has_formatter<mapped_type, context>::value,
-                         formatter<mapped_type, char_type>,
-                         fallback_formatter<T, char_type>>();
-  return f.parse(ctx);
-}
-
-// A parse context with extra argument id checks. It is only used at compile
-// time because adding checks at runtime would introduce substantial overhead
-// and would be redundant since argument ids are checked when arguments are
-// retrieved anyway.
-template <typename Char, typename ErrorHandler = error_handler>
-class compile_parse_context
-    : public basic_format_parse_context<Char, ErrorHandler> {
- private:
-  int num_args_;
-  using base = basic_format_parse_context<Char, ErrorHandler>;
-
- public:
-  explicit FMT_CONSTEXPR compile_parse_context(
-      basic_string_view<Char> format_str,
-      int num_args = (std::numeric_limits<int>::max)(), ErrorHandler eh = {})
-      : base(format_str, eh), num_args_(num_args) {}
-
-  FMT_CONSTEXPR auto next_arg_id() -> int {
-    int id = base::next_arg_id();
-    if (id >= num_args_) this->on_error("argument not found");
-    return id;
-  }
-
-  FMT_CONSTEXPR void check_arg_id(int id) {
-    base::check_arg_id(id);
-    if (id >= num_args_) this->on_error("argument not found");
-  }
-  using base::check_arg_id;
-};
-
-template <typename ErrorHandler>
-FMT_CONSTEXPR void check_int_type_spec(presentation_type type,
-                                       ErrorHandler&& eh) {
-  if (type > presentation_type::bin_upper && type != presentation_type::chr)
-    eh.on_error("invalid type specifier");
-}
-
-// Checks char specs and returns true if the type spec is char (and not int).
-template <typename Char, typename ErrorHandler = error_handler>
-FMT_CONSTEXPR auto check_char_specs(const basic_format_specs<Char>& specs,
-                                    ErrorHandler&& eh = {}) -> bool {
-  if (specs.type != presentation_type::none &&
-      specs.type != presentation_type::chr) {
-    check_int_type_spec(specs.type, eh);
-    return false;
-  }
-  if (specs.align == align::numeric || specs.sign != sign::none || specs.alt)
-    eh.on_error("invalid format specifier for char");
-  return true;
-}
-
-// A floating-point presentation format.
-enum class float_format : unsigned char {
-  general,  // General: exponent notation or fixed point based on magnitude.
-  exp,      // Exponent notation with the default precision of 6, e.g. 1.2e-3.
-  fixed,    // Fixed point with the default precision of 6, e.g. 0.0012.
-  hex
-};
-
-struct float_specs {
-  int precision;
-  float_format format : 8;
-  sign_t sign : 8;
-  bool upper : 1;
-  bool locale : 1;
-  bool binary32 : 1;
-  bool fallback : 1;
-  bool showpoint : 1;
-};
-
-template <typename ErrorHandler = error_handler, typename Char>
-FMT_CONSTEXPR auto parse_float_type_spec(const basic_format_specs<Char>& specs,
-                                         ErrorHandler&& eh = {})
-    -> float_specs {
-  auto result = float_specs();
-  result.showpoint = specs.alt;
-  result.locale = specs.localized;
-  switch (specs.type) {
-  case presentation_type::none:
-    result.format = float_format::general;
-    break;
-  case presentation_type::general_upper:
-    result.upper = true;
-    FMT_FALLTHROUGH;
-  case presentation_type::general_lower:
-    result.format = float_format::general;
-    break;
-  case presentation_type::exp_upper:
-    result.upper = true;
-    FMT_FALLTHROUGH;
-  case presentation_type::exp_lower:
-    result.format = float_format::exp;
-    result.showpoint |= specs.precision != 0;
-    break;
-  case presentation_type::fixed_upper:
-    result.upper = true;
-    FMT_FALLTHROUGH;
-  case presentation_type::fixed_lower:
-    result.format = float_format::fixed;
-    result.showpoint |= specs.precision != 0;
-    break;
-  case presentation_type::hexfloat_upper:
-    result.upper = true;
-    FMT_FALLTHROUGH;
-  case presentation_type::hexfloat_lower:
-    result.format = float_format::hex;
-    break;
-  default:
-    eh.on_error("invalid type specifier");
-    break;
-  }
-  return result;
-}
-
-template <typename ErrorHandler = error_handler>
-FMT_CONSTEXPR auto check_cstring_type_spec(presentation_type type,
-                                           ErrorHandler&& eh = {}) -> bool {
-  if (type == presentation_type::none || type == presentation_type::string)
-    return true;
-  if (type != presentation_type::pointer) eh.on_error("invalid type specifier");
-  return false;
-}
-
-template <typename ErrorHandler = error_handler>
-FMT_CONSTEXPR void check_string_type_spec(presentation_type type,
-                                          ErrorHandler&& eh = {}) {
-  if (type != presentation_type::none && type != presentation_type::string)
-    eh.on_error("invalid type specifier");
-}
-
-template <typename ErrorHandler>
-FMT_CONSTEXPR void check_pointer_type_spec(presentation_type type,
-                                           ErrorHandler&& eh) {
-  if (type != presentation_type::none && type != presentation_type::pointer)
-    eh.on_error("invalid type specifier");
-}
-
-// A parse_format_specs handler that checks if specifiers are consistent with
-// the argument type.
-template <typename Handler> class specs_checker : public Handler {
- private:
-  detail::type arg_type_;
-
-  FMT_CONSTEXPR void require_numeric_argument() {
-    if (!is_arithmetic_type(arg_type_))
-      this->on_error("format specifier requires numeric argument");
-  }
-
- public:
-  FMT_CONSTEXPR specs_checker(const Handler& handler, detail::type arg_type)
-      : Handler(handler), arg_type_(arg_type) {}
-
-  FMT_CONSTEXPR void on_align(align_t align) {
-    if (align == align::numeric) require_numeric_argument();
-    Handler::on_align(align);
-  }
-
-  FMT_CONSTEXPR void on_sign(sign_t s) {
-    require_numeric_argument();
-    if (is_integral_type(arg_type_) && arg_type_ != type::int_type &&
-        arg_type_ != type::long_long_type && arg_type_ != type::char_type) {
-      this->on_error("format specifier requires signed argument");
-    }
-    Handler::on_sign(s);
-  }
-
-  FMT_CONSTEXPR void on_hash() {
-    require_numeric_argument();
-    Handler::on_hash();
-  }
-
-  FMT_CONSTEXPR void on_localized() {
-    require_numeric_argument();
-    Handler::on_localized();
-  }
-
-  FMT_CONSTEXPR void on_zero() {
-    require_numeric_argument();
-    Handler::on_zero();
-  }
-
-  FMT_CONSTEXPR void end_precision() {
-    if (is_integral_type(arg_type_) || arg_type_ == type::pointer_type)
-      this->on_error("precision not allowed for this argument type");
-  }
-};
-
-constexpr int invalid_arg_index = -1;
-
-#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-template <int N, typename T, typename... Args, typename Char>
-constexpr auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
-  if constexpr (detail::is_statically_named_arg<T>()) {
-    if (name == T::name) return N;
-  }
-  if constexpr (sizeof...(Args) > 0)
-    return get_arg_index_by_name<N + 1, Args...>(name);
-  (void)name;  // Workaround an MSVC bug about "unused" parameter.
-  return invalid_arg_index;
-}
-#endif
-
-template <typename... Args, typename Char>
-FMT_CONSTEXPR auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
-#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-  if constexpr (sizeof...(Args) > 0)
-    return get_arg_index_by_name<0, Args...>(name);
-#endif
-  (void)name;
-  return invalid_arg_index;
-}
-
-template <typename Char, typename ErrorHandler, typename... Args>
-class format_string_checker {
- private:
-  using parse_context_type = compile_parse_context<Char, ErrorHandler>;
-  enum { num_args = sizeof...(Args) };
-
-  // Format specifier parsing function.
-  using parse_func = const Char* (*)(parse_context_type&);
-
-  parse_context_type context_;
-  parse_func parse_funcs_[num_args > 0 ? num_args : 1];
-
- public:
-  explicit FMT_CONSTEXPR format_string_checker(
-      basic_string_view<Char> format_str, ErrorHandler eh)
-      : context_(format_str, num_args, eh),
-        parse_funcs_{&parse_format_specs<Args, parse_context_type>...} {}
-
-  FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
-
-  FMT_CONSTEXPR auto on_arg_id() -> int { return context_.next_arg_id(); }
-  FMT_CONSTEXPR auto on_arg_id(int id) -> int {
-    return context_.check_arg_id(id), id;
-  }
-  FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
-#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-    auto index = get_arg_index_by_name<Args...>(id);
-    if (index == invalid_arg_index) on_error("named argument is not found");
-    return context_.check_arg_id(index), index;
-#else
-    (void)id;
-    on_error("compile-time checks for named arguments require C++20 support");
-    return 0;
-#endif
-  }
-
-  FMT_CONSTEXPR void on_replacement_field(int, const Char*) {}
-
-  FMT_CONSTEXPR auto on_format_specs(int id, const Char* begin, const Char*)
-      -> const Char* {
-    context_.advance_to(context_.begin() + (begin - &*context_.begin()));
-    // id >= 0 check is a workaround for gcc 10 bug (#2065).
-    return id >= 0 && id < num_args ? parse_funcs_[id](context_) : begin;
-  }
-
-  FMT_CONSTEXPR void on_error(const char* message) {
-    context_.on_error(message);
-  }
-};
-
-template <typename... Args, typename S,
-          enable_if_t<(is_compile_string<S>::value), int>>
-void check_format_string(S format_str) {
-  FMT_CONSTEXPR auto s = to_string_view(format_str);
-  using checker = format_string_checker<typename S::char_type, error_handler,
-                                        remove_cvref_t<Args>...>;
-  FMT_CONSTEXPR bool invalid_format =
-      (parse_format_string<true>(s, checker(s, {})), true);
-  ignore_unused(invalid_format);
-}
-
-template <typename Char>
-void vformat_to(
-    buffer<Char>& buf, basic_string_view<Char> fmt,
-    basic_format_args<FMT_BUFFER_CONTEXT(type_identity_t<Char>)> args,
-    locale_ref loc = {});
-
-FMT_API void vprint_mojibake(std::FILE*, string_view, format_args);
-#ifndef _WIN32
-inline void vprint_mojibake(std::FILE*, string_view, format_args) {}
-#endif
-FMT_END_DETAIL_NAMESPACE
-
-// A formatter specialization for the core types corresponding to detail::type
-// constants.
-template <typename T, typename Char>
-struct formatter<T, Char,
-                 enable_if_t<detail::type_constant<T, Char>::value !=
-                             detail::type::custom_type>> {
- private:
-  detail::dynamic_format_specs<Char> specs_;
-
- public:
-  // Parses format specifiers stopping either at the end of the range or at the
-  // terminating '}'.
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    auto begin = ctx.begin(), end = ctx.end();
-    if (begin == end) return begin;
-    using handler_type = detail::dynamic_specs_handler<ParseContext>;
-    auto type = detail::type_constant<T, Char>::value;
-    auto checker =
-        detail::specs_checker<handler_type>(handler_type(specs_, ctx), type);
-    auto it = detail::parse_format_specs(begin, end, checker);
-    auto eh = ctx.error_handler();
-    switch (type) {
-    case detail::type::none_type:
-      FMT_ASSERT(false, "invalid argument type");
-      break;
-    case detail::type::bool_type:
-      if (specs_.type == presentation_type::none ||
-          specs_.type == presentation_type::string) {
-        break;
-      }
-      FMT_FALLTHROUGH;
-    case detail::type::int_type:
-    case detail::type::uint_type:
-    case detail::type::long_long_type:
-    case detail::type::ulong_long_type:
-    case detail::type::int128_type:
-    case detail::type::uint128_type:
-      detail::check_int_type_spec(specs_.type, eh);
-      break;
-    case detail::type::char_type:
-      detail::check_char_specs(specs_, eh);
-      break;
-    case detail::type::float_type:
-      if (detail::const_check(FMT_USE_FLOAT))
-        detail::parse_float_type_spec(specs_, eh);
-      else
-        FMT_ASSERT(false, "float support disabled");
-      break;
-    case detail::type::double_type:
-      if (detail::const_check(FMT_USE_DOUBLE))
-        detail::parse_float_type_spec(specs_, eh);
-      else
-        FMT_ASSERT(false, "double support disabled");
-      break;
-    case detail::type::long_double_type:
-      if (detail::const_check(FMT_USE_LONG_DOUBLE))
-        detail::parse_float_type_spec(specs_, eh);
-      else
-        FMT_ASSERT(false, "long double support disabled");
-      break;
-    case detail::type::cstring_type:
-      detail::check_cstring_type_spec(specs_.type, eh);
-      break;
-    case detail::type::string_type:
-      detail::check_string_type_spec(specs_.type, eh);
-      break;
-    case detail::type::pointer_type:
-      detail::check_pointer_type_spec(specs_.type, eh);
-      break;
-    case detail::type::custom_type:
-      // Custom format specifiers are checked in parse functions of
-      // formatter specializations.
-      break;
-    }
-    return it;
-  }
-
-  template <typename FormatContext>
-  FMT_CONSTEXPR auto format(const T& val, FormatContext& ctx) const
-      -> decltype(ctx.out());
-};
-
-template <typename Char> struct basic_runtime { basic_string_view<Char> str; };
-
-/** A compile-time format string. */
-template <typename Char, typename... Args> class basic_format_string {
- private:
-  basic_string_view<Char> str_;
-
- public:
-  template <typename S,
-            FMT_ENABLE_IF(
-                std::is_convertible<const S&, basic_string_view<Char>>::value)>
-  FMT_CONSTEVAL FMT_INLINE basic_format_string(const S& s) : str_(s) {
-    static_assert(
-        detail::count<
-            (std::is_base_of<detail::view, remove_reference_t<Args>>::value &&
-             std::is_reference<Args>::value)...>() == 0,
-        "passing views as lvalues is disallowed");
-#ifdef FMT_HAS_CONSTEVAL
-    if constexpr (detail::count_named_args<Args...>() ==
-                  detail::count_statically_named_args<Args...>()) {
-      using checker = detail::format_string_checker<Char, detail::error_handler,
-                                                    remove_cvref_t<Args>...>;
-      detail::parse_format_string<true>(str_, checker(s, {}));
-    }
-#else
-    detail::check_format_string<Args...>(s);
-#endif
-  }
-  basic_format_string(basic_runtime<Char> r) : str_(r.str) {}
-
-  FMT_INLINE operator basic_string_view<Char>() const { return str_; }
-};
-
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-// Workaround broken conversion on older gcc.
-template <typename... Args> using format_string = string_view;
-template <typename S> auto runtime(const S& s) -> basic_string_view<char_t<S>> {
-  return s;
-}
-#else
-template <typename... Args>
-using format_string = basic_format_string<char, type_identity_t<Args>...>;
-/**
-  \rst
-  Creates a runtime format string.
-
-  **Example**::
-
-    // Check format string at runtime instead of compile-time.
-    fmt::print(fmt::runtime("{:d}"), "I am not a number");
-  \endrst
- */
-template <typename S> auto runtime(const S& s) -> basic_runtime<char_t<S>> {
-  return {{s}};
-}
-#endif
-
-FMT_API auto vformat(string_view fmt, format_args args) -> std::string;
-
-/**
-  \rst
-  Formats ``args`` according to specifications in ``fmt`` and returns the result
-  as a string.
-
-  **Example**::
-
-    #include <fmt/core.h>
-    std::string message = fmt::format("The answer is {}.", 42);
-  \endrst
-*/
-template <typename... T>
-FMT_NODISCARD FMT_INLINE auto format(format_string<T...> fmt, T&&... args)
-    -> std::string {
-  return vformat(fmt, fmt::make_format_args(args...));
-}
-
-/** Formats a string and writes the output to ``out``. */
-template <typename OutputIt,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
-auto vformat_to(OutputIt out, string_view fmt, format_args args) -> OutputIt {
-  using detail::get_buffer;
-  auto&& buf = get_buffer<char>(out);
-  detail::vformat_to(buf, fmt, args, {});
-  return detail::get_iterator(buf);
-}
-
-/**
- \rst
- Formats ``args`` according to specifications in ``fmt``, writes the result to
- the output iterator ``out`` and returns the iterator past the end of the output
- range. `format_to` does not append a terminating null character.
-
- **Example**::
-
-   auto out = std::vector<char>();
-   fmt::format_to(std::back_inserter(out), "{}", 42);
- \endrst
- */
-template <typename OutputIt, typename... T,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
-FMT_INLINE auto format_to(OutputIt out, format_string<T...> fmt, T&&... args)
-    -> OutputIt {
-  return vformat_to(out, fmt, fmt::make_format_args(args...));
-}
-
-template <typename OutputIt> struct format_to_n_result {
-  /** Iterator past the end of the output range. */
-  OutputIt out;
-  /** Total (not truncated) output size. */
-  size_t size;
-};
-
-template <typename OutputIt, typename... T,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
-auto vformat_to_n(OutputIt out, size_t n, string_view fmt, format_args args)
-    -> format_to_n_result<OutputIt> {
-  using traits = detail::fixed_buffer_traits;
-  auto buf = detail::iterator_buffer<OutputIt, char, traits>(out, n);
-  detail::vformat_to(buf, fmt, args, {});
-  return {buf.out(), buf.count()};
-}
-
-/**
-  \rst
-  Formats ``args`` according to specifications in ``fmt``, writes up to ``n``
-  characters of the result to the output iterator ``out`` and returns the total
-  (not truncated) output size and the iterator past the end of the output range.
-  `format_to_n` does not append a terminating null character.
-  \endrst
- */
-template <typename OutputIt, typename... T,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
-FMT_INLINE auto format_to_n(OutputIt out, size_t n, format_string<T...> fmt,
-                            T&&... args) -> format_to_n_result<OutputIt> {
-  return vformat_to_n(out, n, fmt, fmt::make_format_args(args...));
-}
-
-/** Returns the number of chars in the output of ``format(fmt, args...)``. */
-template <typename... T>
-FMT_NODISCARD FMT_INLINE auto formatted_size(format_string<T...> fmt,
-                                             T&&... args) -> size_t {
-  auto buf = detail::counting_buffer<>();
-  detail::vformat_to(buf, string_view(fmt), fmt::make_format_args(args...), {});
-  return buf.count();
-}
-
-FMT_API void vprint(string_view fmt, format_args args);
-FMT_API void vprint(std::FILE* f, string_view fmt, format_args args);
-
-/**
-  \rst
-  Formats ``args`` according to specifications in ``fmt`` and writes the output
-  to ``stdout``.
-
-  **Example**::
-
-    fmt::print("Elapsed time: {0:.2f} seconds", 1.23);
-  \endrst
- */
-template <typename... T>
-FMT_INLINE void print(format_string<T...> fmt, T&&... args) {
-  const auto& vargs = fmt::make_format_args(args...);
-  return detail::is_utf8() ? vprint(fmt, vargs)
-                           : detail::vprint_mojibake(stdout, fmt, vargs);
-}
-
-/**
-  \rst
-  Formats ``args`` according to specifications in ``fmt`` and writes the
-  output to the file ``f``.
-
-  **Example**::
-
-    fmt::print(stderr, "Don't {}!", "panic");
-  \endrst
- */
-template <typename... T>
-FMT_INLINE void print(std::FILE* f, format_string<T...> fmt, T&&... args) {
-  const auto& vargs = fmt::make_format_args(args...);
-  return detail::is_utf8() ? vprint(f, fmt, vargs)
-                           : detail::vprint_mojibake(f, fmt, vargs);
-}
-
-FMT_MODULE_EXPORT_END
-FMT_GCC_PRAGMA("GCC pop_options")
-FMT_END_NAMESPACE
-
-#ifdef FMT_HEADER_ONLY
-#  include "format.h"
-#endif
-#endif  // FMT_CORE_H_
diff --git a/3rdparty/fmt/include/fmt/format-inl.h b/3rdparty/fmt/include/fmt/format-inl.h
deleted file mode 100644
index 2c51c50a..00000000
--- a/3rdparty/fmt/include/fmt/format-inl.h
+++ /dev/null
@@ -1,2643 +0,0 @@
-// Formatting library for C++ - implementation
-//
-// Copyright (c) 2012 - 2016, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_FORMAT_INL_H_
-#define FMT_FORMAT_INL_H_
-
-#include <algorithm>
-#include <cctype>
-#include <cerrno>  // errno
-#include <climits>
-#include <cmath>
-#include <cstdarg>
-#include <cstring>  // std::memmove
-#include <cwchar>
-#include <exception>
-
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-#  include <locale>
-#endif
-
-#ifdef _WIN32
-#  include <io.h>  // _isatty
-#endif
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-namespace detail {
-
-FMT_FUNC void assert_fail(const char* file, int line, const char* message) {
-  // Use unchecked std::fprintf to avoid triggering another assertion when
-  // writing to stderr fails
-  std::fprintf(stderr, "%s:%d: assertion failed: %s", file, line, message);
-  // Chosen instead of std::abort to satisfy Clang in CUDA mode during device
-  // code pass.
-  std::terminate();
-}
-
-FMT_FUNC void throw_format_error(const char* message) {
-  FMT_THROW(format_error(message));
-}
-
-#ifndef _MSC_VER
-#  define FMT_SNPRINTF snprintf
-#else  // _MSC_VER
-inline int fmt_snprintf(char* buffer, size_t size, const char* format, ...) {
-  va_list args;
-  va_start(args, format);
-  int result = vsnprintf_s(buffer, size, _TRUNCATE, format, args);
-  va_end(args);
-  return result;
-}
-#  define FMT_SNPRINTF fmt_snprintf
-#endif  // _MSC_VER
-
-FMT_FUNC void format_error_code(detail::buffer<char>& out, int error_code,
-                                string_view message) FMT_NOEXCEPT {
-  // Report error code making sure that the output fits into
-  // inline_buffer_size to avoid dynamic memory allocation and potential
-  // bad_alloc.
-  out.try_resize(0);
-  static const char SEP[] = ": ";
-  static const char ERROR_STR[] = "error ";
-  // Subtract 2 to account for terminating null characters in SEP and ERROR_STR.
-  size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2;
-  auto abs_value = static_cast<uint32_or_64_or_128_t<int>>(error_code);
-  if (detail::is_negative(error_code)) {
-    abs_value = 0 - abs_value;
-    ++error_code_size;
-  }
-  error_code_size += detail::to_unsigned(detail::count_digits(abs_value));
-  auto it = buffer_appender<char>(out);
-  if (message.size() <= inline_buffer_size - error_code_size)
-    format_to(it, FMT_STRING("{}{}"), message, SEP);
-  format_to(it, FMT_STRING("{}{}"), ERROR_STR, error_code);
-  FMT_ASSERT(out.size() <= inline_buffer_size, "");
-}
-
-FMT_FUNC void report_error(format_func func, int error_code,
-                           const char* message) FMT_NOEXCEPT {
-  memory_buffer full_message;
-  func(full_message, error_code, message);
-  // Don't use fwrite_fully because the latter may throw.
-  if (std::fwrite(full_message.data(), full_message.size(), 1, stderr) > 0)
-    std::fputc('\n', stderr);
-}
-
-// A wrapper around fwrite that throws on error.
-inline void fwrite_fully(const void* ptr, size_t size, size_t count,
-                         FILE* stream) {
-  size_t written = std::fwrite(ptr, size, count, stream);
-  if (written < count) FMT_THROW(system_error(errno, "cannot write to file"));
-}
-
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-template <typename Locale>
-locale_ref::locale_ref(const Locale& loc) : locale_(&loc) {
-  static_assert(std::is_same<Locale, std::locale>::value, "");
-}
-
-template <typename Locale> Locale locale_ref::get() const {
-  static_assert(std::is_same<Locale, std::locale>::value, "");
-  return locale_ ? *static_cast<const std::locale*>(locale_) : std::locale();
-}
-
-template <typename Char>
-FMT_FUNC auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result<Char> {
-  auto& facet = std::use_facet<std::numpunct<Char>>(loc.get<std::locale>());
-  auto grouping = facet.grouping();
-  auto thousands_sep = grouping.empty() ? Char() : facet.thousands_sep();
-  return {std::move(grouping), thousands_sep};
-}
-template <typename Char> FMT_FUNC Char decimal_point_impl(locale_ref loc) {
-  return std::use_facet<std::numpunct<Char>>(loc.get<std::locale>())
-      .decimal_point();
-}
-#else
-template <typename Char>
-FMT_FUNC auto thousands_sep_impl(locale_ref) -> thousands_sep_result<Char> {
-  return {"\03", FMT_STATIC_THOUSANDS_SEPARATOR};
-}
-template <typename Char> FMT_FUNC Char decimal_point_impl(locale_ref) {
-  return '.';
-}
-#endif
-}  // namespace detail
-
-#if !FMT_MSC_VER
-FMT_API FMT_FUNC format_error::~format_error() FMT_NOEXCEPT = default;
-#endif
-
-FMT_FUNC std::system_error vsystem_error(int error_code, string_view format_str,
-                                         format_args args) {
-  auto ec = std::error_code(error_code, std::generic_category());
-  return std::system_error(ec, vformat(format_str, args));
-}
-
-namespace detail {
-
-template <> FMT_FUNC int count_digits<4>(detail::fallback_uintptr n) {
-  // fallback_uintptr is always stored in little endian.
-  int i = static_cast<int>(sizeof(void*)) - 1;
-  while (i > 0 && n.value[i] == 0) --i;
-  auto char_digits = std::numeric_limits<unsigned char>::digits / 4;
-  return i >= 0 ? i * char_digits + count_digits<4, unsigned>(n.value[i]) : 1;
-}
-
-// log10(2) = 0x0.4d104d427de7fbcc...
-static constexpr uint64_t log10_2_significand = 0x4d104d427de7fbcc;
-
-template <typename T = void> struct basic_impl_data {
-  // Normalized 64-bit significands of pow(10, k), for k = -348, -340, ..., 340.
-  // These are generated by support/compute-powers.py.
-  static constexpr uint64_t pow10_significands[87] = {
-      0xfa8fd5a0081c0288, 0xbaaee17fa23ebf76, 0x8b16fb203055ac76,
-      0xcf42894a5dce35ea, 0x9a6bb0aa55653b2d, 0xe61acf033d1a45df,
-      0xab70fe17c79ac6ca, 0xff77b1fcbebcdc4f, 0xbe5691ef416bd60c,
-      0x8dd01fad907ffc3c, 0xd3515c2831559a83, 0x9d71ac8fada6c9b5,
-      0xea9c227723ee8bcb, 0xaecc49914078536d, 0x823c12795db6ce57,
-      0xc21094364dfb5637, 0x9096ea6f3848984f, 0xd77485cb25823ac7,
-      0xa086cfcd97bf97f4, 0xef340a98172aace5, 0xb23867fb2a35b28e,
-      0x84c8d4dfd2c63f3b, 0xc5dd44271ad3cdba, 0x936b9fcebb25c996,
-      0xdbac6c247d62a584, 0xa3ab66580d5fdaf6, 0xf3e2f893dec3f126,
-      0xb5b5ada8aaff80b8, 0x87625f056c7c4a8b, 0xc9bcff6034c13053,
-      0x964e858c91ba2655, 0xdff9772470297ebd, 0xa6dfbd9fb8e5b88f,
-      0xf8a95fcf88747d94, 0xb94470938fa89bcf, 0x8a08f0f8bf0f156b,
-      0xcdb02555653131b6, 0x993fe2c6d07b7fac, 0xe45c10c42a2b3b06,
-      0xaa242499697392d3, 0xfd87b5f28300ca0e, 0xbce5086492111aeb,
-      0x8cbccc096f5088cc, 0xd1b71758e219652c, 0x9c40000000000000,
-      0xe8d4a51000000000, 0xad78ebc5ac620000, 0x813f3978f8940984,
-      0xc097ce7bc90715b3, 0x8f7e32ce7bea5c70, 0xd5d238a4abe98068,
-      0x9f4f2726179a2245, 0xed63a231d4c4fb27, 0xb0de65388cc8ada8,
-      0x83c7088e1aab65db, 0xc45d1df942711d9a, 0x924d692ca61be758,
-      0xda01ee641a708dea, 0xa26da3999aef774a, 0xf209787bb47d6b85,
-      0xb454e4a179dd1877, 0x865b86925b9bc5c2, 0xc83553c5c8965d3d,
-      0x952ab45cfa97a0b3, 0xde469fbd99a05fe3, 0xa59bc234db398c25,
-      0xf6c69a72a3989f5c, 0xb7dcbf5354e9bece, 0x88fcf317f22241e2,
-      0xcc20ce9bd35c78a5, 0x98165af37b2153df, 0xe2a0b5dc971f303a,
-      0xa8d9d1535ce3b396, 0xfb9b7cd9a4a7443c, 0xbb764c4ca7a44410,
-      0x8bab8eefb6409c1a, 0xd01fef10a657842c, 0x9b10a4e5e9913129,
-      0xe7109bfba19c0c9d, 0xac2820d9623bf429, 0x80444b5e7aa7cf85,
-      0xbf21e44003acdd2d, 0x8e679c2f5e44ff8f, 0xd433179d9c8cb841,
-      0x9e19db92b4e31ba9, 0xeb96bf6ebadf77d9, 0xaf87023b9bf0ee6b,
-  };
-
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-#  pragma GCC diagnostic push
-#  pragma GCC diagnostic ignored "-Wnarrowing"
-#endif
-  // Binary exponents of pow(10, k), for k = -348, -340, ..., 340, corresponding
-  // to significands above.
-  static constexpr int16_t pow10_exponents[87] = {
-      -1220, -1193, -1166, -1140, -1113, -1087, -1060, -1034, -1007, -980, -954,
-      -927,  -901,  -874,  -847,  -821,  -794,  -768,  -741,  -715,  -688, -661,
-      -635,  -608,  -582,  -555,  -529,  -502,  -475,  -449,  -422,  -396, -369,
-      -343,  -316,  -289,  -263,  -236,  -210,  -183,  -157,  -130,  -103, -77,
-      -50,   -24,   3,     30,    56,    83,    109,   136,   162,   189,  216,
-      242,   269,   295,   322,   348,   375,   402,   428,   455,   481,  508,
-      534,   561,   588,   614,   641,   667,   694,   720,   747,   774,  800,
-      827,   853,   880,   907,   933,   960,   986,   1013,  1039,  1066};
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-#  pragma GCC diagnostic pop
-#endif
-
-  static constexpr uint64_t power_of_10_64[20] = {
-      1, FMT_POWERS_OF_10(1ULL), FMT_POWERS_OF_10(1000000000ULL),
-      10000000000000000000ULL};
-};
-
-// This is a struct rather than an alias to avoid shadowing warnings in gcc.
-struct impl_data : basic_impl_data<> {};
-
-#if __cplusplus < 201703L
-template <typename T>
-constexpr uint64_t basic_impl_data<T>::pow10_significands[];
-template <typename T> constexpr int16_t basic_impl_data<T>::pow10_exponents[];
-template <typename T> constexpr uint64_t basic_impl_data<T>::power_of_10_64[];
-#endif
-
-template <typename T> struct bits {
-  static FMT_CONSTEXPR_DECL const int value =
-      static_cast<int>(sizeof(T) * std::numeric_limits<unsigned char>::digits);
-};
-
-// Returns the number of significand bits in Float excluding the implicit bit.
-template <typename Float> constexpr int num_significand_bits() {
-  // Subtract 1 to account for an implicit most significant bit in the
-  // normalized form.
-  return std::numeric_limits<Float>::digits - 1;
-}
-
-// A floating-point number f * pow(2, e).
-struct fp {
-  uint64_t f;
-  int e;
-
-  static constexpr const int num_significand_bits = bits<decltype(f)>::value;
-
-  constexpr fp() : f(0), e(0) {}
-  constexpr fp(uint64_t f_val, int e_val) : f(f_val), e(e_val) {}
-
-  // Constructs fp from an IEEE754 floating-point number. It is a template to
-  // prevent compile errors on systems where n is not IEEE754.
-  template <typename Float> explicit FMT_CONSTEXPR fp(Float n) { assign(n); }
-
-  template <typename Float>
-  using is_supported = bool_constant<sizeof(Float) == sizeof(uint64_t) ||
-                                     sizeof(Float) == sizeof(uint32_t)>;
-
-  // Assigns d to this and return true iff predecessor is closer than successor.
-  template <typename Float, FMT_ENABLE_IF(is_supported<Float>::value)>
-  FMT_CONSTEXPR bool assign(Float n) {
-    // Assume float is in the format [sign][exponent][significand].
-    const int num_float_significand_bits =
-        detail::num_significand_bits<Float>();
-    const uint64_t implicit_bit = 1ULL << num_float_significand_bits;
-    const uint64_t significand_mask = implicit_bit - 1;
-    constexpr bool is_double = sizeof(Float) == sizeof(uint64_t);
-    auto u = bit_cast<conditional_t<is_double, uint64_t, uint32_t>>(n);
-    f = u & significand_mask;
-    const uint64_t exponent_mask = (~0ULL >> 1) & ~significand_mask;
-    int biased_e =
-        static_cast<int>((u & exponent_mask) >> num_float_significand_bits);
-    // The predecessor is closer if n is a normalized power of 2 (f == 0) other
-    // than the smallest normalized number (biased_e > 1).
-    bool is_predecessor_closer = f == 0 && biased_e > 1;
-    if (biased_e != 0)
-      f += implicit_bit;
-    else
-      biased_e = 1;  // Subnormals use biased exponent 1 (min exponent).
-    const int exponent_bias = std::numeric_limits<Float>::max_exponent - 1;
-    e = biased_e - exponent_bias - num_float_significand_bits;
-    return is_predecessor_closer;
-  }
-
-  template <typename Float, FMT_ENABLE_IF(!is_supported<Float>::value)>
-  bool assign(Float) {
-    FMT_ASSERT(false, "");
-    return false;
-  }
-};
-
-// Normalizes the value converted from double and multiplied by (1 << SHIFT).
-template <int SHIFT = 0> FMT_CONSTEXPR fp normalize(fp value) {
-  // Handle subnormals.
-  const uint64_t implicit_bit = 1ULL << num_significand_bits<double>();
-  const auto shifted_implicit_bit = implicit_bit << SHIFT;
-  while ((value.f & shifted_implicit_bit) == 0) {
-    value.f <<= 1;
-    --value.e;
-  }
-  // Subtract 1 to account for hidden bit.
-  const auto offset =
-      fp::num_significand_bits - num_significand_bits<double>() - SHIFT - 1;
-  value.f <<= offset;
-  value.e -= offset;
-  return value;
-}
-
-inline bool operator==(fp x, fp y) { return x.f == y.f && x.e == y.e; }
-
-// Computes lhs * rhs / pow(2, 64) rounded to nearest with half-up tie breaking.
-FMT_CONSTEXPR inline uint64_t multiply(uint64_t lhs, uint64_t rhs) {
-#if FMT_USE_INT128
-  auto product = static_cast<__uint128_t>(lhs) * rhs;
-  auto f = static_cast<uint64_t>(product >> 64);
-  return (static_cast<uint64_t>(product) & (1ULL << 63)) != 0 ? f + 1 : f;
-#else
-  // Multiply 32-bit parts of significands.
-  uint64_t mask = (1ULL << 32) - 1;
-  uint64_t a = lhs >> 32, b = lhs & mask;
-  uint64_t c = rhs >> 32, d = rhs & mask;
-  uint64_t ac = a * c, bc = b * c, ad = a * d, bd = b * d;
-  // Compute mid 64-bit of result and round.
-  uint64_t mid = (bd >> 32) + (ad & mask) + (bc & mask) + (1U << 31);
-  return ac + (ad >> 32) + (bc >> 32) + (mid >> 32);
-#endif
-}
-
-FMT_CONSTEXPR inline fp operator*(fp x, fp y) {
-  return {multiply(x.f, y.f), x.e + y.e + 64};
-}
-
-// Returns a cached power of 10 `c_k = c_k.f * pow(2, c_k.e)` such that its
-// (binary) exponent satisfies `min_exponent <= c_k.e <= min_exponent + 28`.
-FMT_CONSTEXPR inline fp get_cached_power(int min_exponent,
-                                         int& pow10_exponent) {
-  const int shift = 32;
-  const auto significand = static_cast<int64_t>(log10_2_significand);
-  int index = static_cast<int>(
-      ((min_exponent + fp::num_significand_bits - 1) * (significand >> shift) +
-       ((int64_t(1) << shift) - 1))  // ceil
-      >> 32                          // arithmetic shift
-  );
-  // Decimal exponent of the first (smallest) cached power of 10.
-  const int first_dec_exp = -348;
-  // Difference between 2 consecutive decimal exponents in cached powers of 10.
-  const int dec_exp_step = 8;
-  index = (index - first_dec_exp - 1) / dec_exp_step + 1;
-  pow10_exponent = first_dec_exp + index * dec_exp_step;
-  return {impl_data::pow10_significands[index],
-          impl_data::pow10_exponents[index]};
-}
-
-// A simple accumulator to hold the sums of terms in bigint::square if uint128_t
-// is not available.
-struct accumulator {
-  uint64_t lower;
-  uint64_t upper;
-
-  constexpr accumulator() : lower(0), upper(0) {}
-  constexpr explicit operator uint32_t() const {
-    return static_cast<uint32_t>(lower);
-  }
-
-  FMT_CONSTEXPR void operator+=(uint64_t n) {
-    lower += n;
-    if (lower < n) ++upper;
-  }
-  FMT_CONSTEXPR void operator>>=(int shift) {
-    FMT_ASSERT(shift == 32, "");
-    (void)shift;
-    lower = (upper << 32) | (lower >> 32);
-    upper >>= 32;
-  }
-};
-
-class bigint {
- private:
-  // A bigint is stored as an array of bigits (big digits), with bigit at index
-  // 0 being the least significant one.
-  using bigit = uint32_t;
-  using double_bigit = uint64_t;
-  enum { bigits_capacity = 32 };
-  basic_memory_buffer<bigit, bigits_capacity> bigits_;
-  int exp_;
-
-  FMT_CONSTEXPR20 bigit operator[](int index) const {
-    return bigits_[to_unsigned(index)];
-  }
-  FMT_CONSTEXPR20 bigit& operator[](int index) {
-    return bigits_[to_unsigned(index)];
-  }
-
-  static FMT_CONSTEXPR_DECL const int bigit_bits = bits<bigit>::value;
-
-  friend struct formatter<bigint>;
-
-  FMT_CONSTEXPR20 void subtract_bigits(int index, bigit other, bigit& borrow) {
-    auto result = static_cast<double_bigit>((*this)[index]) - other - borrow;
-    (*this)[index] = static_cast<bigit>(result);
-    borrow = static_cast<bigit>(result >> (bigit_bits * 2 - 1));
-  }
-
-  FMT_CONSTEXPR20 void remove_leading_zeros() {
-    int num_bigits = static_cast<int>(bigits_.size()) - 1;
-    while (num_bigits > 0 && (*this)[num_bigits] == 0) --num_bigits;
-    bigits_.resize(to_unsigned(num_bigits + 1));
-  }
-
-  // Computes *this -= other assuming aligned bigints and *this >= other.
-  FMT_CONSTEXPR20 void subtract_aligned(const bigint& other) {
-    FMT_ASSERT(other.exp_ >= exp_, "unaligned bigints");
-    FMT_ASSERT(compare(*this, other) >= 0, "");
-    bigit borrow = 0;
-    int i = other.exp_ - exp_;
-    for (size_t j = 0, n = other.bigits_.size(); j != n; ++i, ++j)
-      subtract_bigits(i, other.bigits_[j], borrow);
-    while (borrow > 0) subtract_bigits(i, 0, borrow);
-    remove_leading_zeros();
-  }
-
-  FMT_CONSTEXPR20 void multiply(uint32_t value) {
-    const double_bigit wide_value = value;
-    bigit carry = 0;
-    for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
-      double_bigit result = bigits_[i] * wide_value + carry;
-      bigits_[i] = static_cast<bigit>(result);
-      carry = static_cast<bigit>(result >> bigit_bits);
-    }
-    if (carry != 0) bigits_.push_back(carry);
-  }
-
-  FMT_CONSTEXPR20 void multiply(uint64_t value) {
-    const bigit mask = ~bigit(0);
-    const double_bigit lower = value & mask;
-    const double_bigit upper = value >> bigit_bits;
-    double_bigit carry = 0;
-    for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
-      double_bigit result = bigits_[i] * lower + (carry & mask);
-      carry =
-          bigits_[i] * upper + (result >> bigit_bits) + (carry >> bigit_bits);
-      bigits_[i] = static_cast<bigit>(result);
-    }
-    while (carry != 0) {
-      bigits_.push_back(carry & mask);
-      carry >>= bigit_bits;
-    }
-  }
-
- public:
-  FMT_CONSTEXPR20 bigint() : exp_(0) {}
-  explicit bigint(uint64_t n) { assign(n); }
-  FMT_CONSTEXPR20 ~bigint() {
-    FMT_ASSERT(bigits_.capacity() <= bigits_capacity, "");
-  }
-
-  bigint(const bigint&) = delete;
-  void operator=(const bigint&) = delete;
-
-  FMT_CONSTEXPR20 void assign(const bigint& other) {
-    auto size = other.bigits_.size();
-    bigits_.resize(size);
-    auto data = other.bigits_.data();
-    std::copy(data, data + size, make_checked(bigits_.data(), size));
-    exp_ = other.exp_;
-  }
-
-  FMT_CONSTEXPR20 void assign(uint64_t n) {
-    size_t num_bigits = 0;
-    do {
-      bigits_[num_bigits++] = n & ~bigit(0);
-      n >>= bigit_bits;
-    } while (n != 0);
-    bigits_.resize(num_bigits);
-    exp_ = 0;
-  }
-
-  FMT_CONSTEXPR20 int num_bigits() const {
-    return static_cast<int>(bigits_.size()) + exp_;
-  }
-
-  FMT_NOINLINE FMT_CONSTEXPR20 bigint& operator<<=(int shift) {
-    FMT_ASSERT(shift >= 0, "");
-    exp_ += shift / bigit_bits;
-    shift %= bigit_bits;
-    if (shift == 0) return *this;
-    bigit carry = 0;
-    for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
-      bigit c = bigits_[i] >> (bigit_bits - shift);
-      bigits_[i] = (bigits_[i] << shift) + carry;
-      carry = c;
-    }
-    if (carry != 0) bigits_.push_back(carry);
-    return *this;
-  }
-
-  template <typename Int> FMT_CONSTEXPR20 bigint& operator*=(Int value) {
-    FMT_ASSERT(value > 0, "");
-    multiply(uint32_or_64_or_128_t<Int>(value));
-    return *this;
-  }
-
-  friend FMT_CONSTEXPR20 int compare(const bigint& lhs, const bigint& rhs) {
-    int num_lhs_bigits = lhs.num_bigits(), num_rhs_bigits = rhs.num_bigits();
-    if (num_lhs_bigits != num_rhs_bigits)
-      return num_lhs_bigits > num_rhs_bigits ? 1 : -1;
-    int i = static_cast<int>(lhs.bigits_.size()) - 1;
-    int j = static_cast<int>(rhs.bigits_.size()) - 1;
-    int end = i - j;
-    if (end < 0) end = 0;
-    for (; i >= end; --i, --j) {
-      bigit lhs_bigit = lhs[i], rhs_bigit = rhs[j];
-      if (lhs_bigit != rhs_bigit) return lhs_bigit > rhs_bigit ? 1 : -1;
-    }
-    if (i != j) return i > j ? 1 : -1;
-    return 0;
-  }
-
-  // Returns compare(lhs1 + lhs2, rhs).
-  friend FMT_CONSTEXPR20 int add_compare(const bigint& lhs1, const bigint& lhs2,
-                                         const bigint& rhs) {
-    int max_lhs_bigits = (std::max)(lhs1.num_bigits(), lhs2.num_bigits());
-    int num_rhs_bigits = rhs.num_bigits();
-    if (max_lhs_bigits + 1 < num_rhs_bigits) return -1;
-    if (max_lhs_bigits > num_rhs_bigits) return 1;
-    auto get_bigit = [](const bigint& n, int i) -> bigit {
-      return i >= n.exp_ && i < n.num_bigits() ? n[i - n.exp_] : 0;
-    };
-    double_bigit borrow = 0;
-    int min_exp = (std::min)((std::min)(lhs1.exp_, lhs2.exp_), rhs.exp_);
-    for (int i = num_rhs_bigits - 1; i >= min_exp; --i) {
-      double_bigit sum =
-          static_cast<double_bigit>(get_bigit(lhs1, i)) + get_bigit(lhs2, i);
-      bigit rhs_bigit = get_bigit(rhs, i);
-      if (sum > rhs_bigit + borrow) return 1;
-      borrow = rhs_bigit + borrow - sum;
-      if (borrow > 1) return -1;
-      borrow <<= bigit_bits;
-    }
-    return borrow != 0 ? -1 : 0;
-  }
-
-  // Assigns pow(10, exp) to this bigint.
-  FMT_CONSTEXPR20 void assign_pow10(int exp) {
-    FMT_ASSERT(exp >= 0, "");
-    if (exp == 0) return assign(1);
-    // Find the top bit.
-    int bitmask = 1;
-    while (exp >= bitmask) bitmask <<= 1;
-    bitmask >>= 1;
-    // pow(10, exp) = pow(5, exp) * pow(2, exp). First compute pow(5, exp) by
-    // repeated squaring and multiplication.
-    assign(5);
-    bitmask >>= 1;
-    while (bitmask != 0) {
-      square();
-      if ((exp & bitmask) != 0) *this *= 5;
-      bitmask >>= 1;
-    }
-    *this <<= exp;  // Multiply by pow(2, exp) by shifting.
-  }
-
-  FMT_CONSTEXPR20 void square() {
-    int num_bigits = static_cast<int>(bigits_.size());
-    int num_result_bigits = 2 * num_bigits;
-    basic_memory_buffer<bigit, bigits_capacity> n(std::move(bigits_));
-    bigits_.resize(to_unsigned(num_result_bigits));
-    using accumulator_t = conditional_t<FMT_USE_INT128, uint128_t, accumulator>;
-    auto sum = accumulator_t();
-    for (int bigit_index = 0; bigit_index < num_bigits; ++bigit_index) {
-      // Compute bigit at position bigit_index of the result by adding
-      // cross-product terms n[i] * n[j] such that i + j == bigit_index.
-      for (int i = 0, j = bigit_index; j >= 0; ++i, --j) {
-        // Most terms are multiplied twice which can be optimized in the future.
-        sum += static_cast<double_bigit>(n[i]) * n[j];
-      }
-      (*this)[bigit_index] = static_cast<bigit>(sum);
-      sum >>= bits<bigit>::value;  // Compute the carry.
-    }
-    // Do the same for the top half.
-    for (int bigit_index = num_bigits; bigit_index < num_result_bigits;
-         ++bigit_index) {
-      for (int j = num_bigits - 1, i = bigit_index - j; i < num_bigits;)
-        sum += static_cast<double_bigit>(n[i++]) * n[j--];
-      (*this)[bigit_index] = static_cast<bigit>(sum);
-      sum >>= bits<bigit>::value;
-    }
-    remove_leading_zeros();
-    exp_ *= 2;
-  }
-
-  // If this bigint has a bigger exponent than other, adds trailing zero to make
-  // exponents equal. This simplifies some operations such as subtraction.
-  FMT_CONSTEXPR20 void align(const bigint& other) {
-    int exp_difference = exp_ - other.exp_;
-    if (exp_difference <= 0) return;
-    int num_bigits = static_cast<int>(bigits_.size());
-    bigits_.resize(to_unsigned(num_bigits + exp_difference));
-    for (int i = num_bigits - 1, j = i + exp_difference; i >= 0; --i, --j)
-      bigits_[j] = bigits_[i];
-    std::uninitialized_fill_n(bigits_.data(), exp_difference, 0);
-    exp_ -= exp_difference;
-  }
-
-  // Divides this bignum by divisor, assigning the remainder to this and
-  // returning the quotient.
-  FMT_CONSTEXPR20 int divmod_assign(const bigint& divisor) {
-    FMT_ASSERT(this != &divisor, "");
-    if (compare(*this, divisor) < 0) return 0;
-    FMT_ASSERT(divisor.bigits_[divisor.bigits_.size() - 1u] != 0, "");
-    align(divisor);
-    int quotient = 0;
-    do {
-      subtract_aligned(divisor);
-      ++quotient;
-    } while (compare(*this, divisor) >= 0);
-    return quotient;
-  }
-};
-
-enum class round_direction { unknown, up, down };
-
-// Given the divisor (normally a power of 10), the remainder = v % divisor for
-// some number v and the error, returns whether v should be rounded up, down, or
-// whether the rounding direction can't be determined due to error.
-// error should be less than divisor / 2.
-FMT_CONSTEXPR inline round_direction get_round_direction(uint64_t divisor,
-                                                         uint64_t remainder,
-                                                         uint64_t error) {
-  FMT_ASSERT(remainder < divisor, "");  // divisor - remainder won't overflow.
-  FMT_ASSERT(error < divisor, "");      // divisor - error won't overflow.
-  FMT_ASSERT(error < divisor - error, "");  // error * 2 won't overflow.
-  // Round down if (remainder + error) * 2 <= divisor.
-  if (remainder <= divisor - remainder && error * 2 <= divisor - remainder * 2)
-    return round_direction::down;
-  // Round up if (remainder - error) * 2 >= divisor.
-  if (remainder >= error &&
-      remainder - error >= divisor - (remainder - error)) {
-    return round_direction::up;
-  }
-  return round_direction::unknown;
-}
-
-namespace digits {
-enum result {
-  more,  // Generate more digits.
-  done,  // Done generating digits.
-  error  // Digit generation cancelled due to an error.
-};
-}
-
-struct gen_digits_handler {
-  char* buf;
-  int size;
-  int precision;
-  int exp10;
-  bool fixed;
-
-  FMT_CONSTEXPR digits::result on_digit(char digit, uint64_t divisor,
-                                        uint64_t remainder, uint64_t error,
-                                        bool integral) {
-    FMT_ASSERT(remainder < divisor, "");
-    buf[size++] = digit;
-    if (!integral && error >= remainder) return digits::error;
-    if (size < precision) return digits::more;
-    if (!integral) {
-      // Check if error * 2 < divisor with overflow prevention.
-      // The check is not needed for the integral part because error = 1
-      // and divisor > (1 << 32) there.
-      if (error >= divisor || error >= divisor - error) return digits::error;
-    } else {
-      FMT_ASSERT(error == 1 && divisor > 2, "");
-    }
-    auto dir = get_round_direction(divisor, remainder, error);
-    if (dir != round_direction::up)
-      return dir == round_direction::down ? digits::done : digits::error;
-    ++buf[size - 1];
-    for (int i = size - 1; i > 0 && buf[i] > '9'; --i) {
-      buf[i] = '0';
-      ++buf[i - 1];
-    }
-    if (buf[0] > '9') {
-      buf[0] = '1';
-      if (fixed)
-        buf[size++] = '0';
-      else
-        ++exp10;
-    }
-    return digits::done;
-  }
-};
-
-// Generates output using the Grisu digit-gen algorithm.
-// error: the size of the region (lower, upper) outside of which numbers
-// definitely do not round to value (Delta in Grisu3).
-FMT_INLINE FMT_CONSTEXPR20 digits::result grisu_gen_digits(
-    fp value, uint64_t error, int& exp, gen_digits_handler& handler) {
-  const fp one(1ULL << -value.e, value.e);
-  // The integral part of scaled value (p1 in Grisu) = value / one. It cannot be
-  // zero because it contains a product of two 64-bit numbers with MSB set (due
-  // to normalization) - 1, shifted right by at most 60 bits.
-  auto integral = static_cast<uint32_t>(value.f >> -one.e);
-  FMT_ASSERT(integral != 0, "");
-  FMT_ASSERT(integral == value.f >> -one.e, "");
-  // The fractional part of scaled value (p2 in Grisu) c = value % one.
-  uint64_t fractional = value.f & (one.f - 1);
-  exp = count_digits(integral);  // kappa in Grisu.
-  // Non-fixed formats require at least one digit and no precision adjustment.
-  if (handler.fixed) {
-    // Adjust fixed precision by exponent because it is relative to decimal
-    // point.
-    int precision_offset = exp + handler.exp10;
-    if (precision_offset > 0 &&
-        handler.precision > max_value<int>() - precision_offset) {
-      FMT_THROW(format_error("number is too big"));
-    }
-    handler.precision += precision_offset;
-    // Check if precision is satisfied just by leading zeros, e.g.
-    // format("{:.2f}", 0.001) gives "0.00" without generating any digits.
-    if (handler.precision <= 0) {
-      if (handler.precision < 0) return digits::done;
-      // Divide by 10 to prevent overflow.
-      uint64_t divisor = impl_data::power_of_10_64[exp - 1] << -one.e;
-      auto dir = get_round_direction(divisor, value.f / 10, error * 10);
-      if (dir == round_direction::unknown) return digits::error;
-      handler.buf[handler.size++] = dir == round_direction::up ? '1' : '0';
-      return digits::done;
-    }
-  }
-  // Generate digits for the integral part. This can produce up to 10 digits.
-  do {
-    uint32_t digit = 0;
-    auto divmod_integral = [&](uint32_t divisor) {
-      digit = integral / divisor;
-      integral %= divisor;
-    };
-    // This optimization by Milo Yip reduces the number of integer divisions by
-    // one per iteration.
-    switch (exp) {
-    case 10:
-      divmod_integral(1000000000);
-      break;
-    case 9:
-      divmod_integral(100000000);
-      break;
-    case 8:
-      divmod_integral(10000000);
-      break;
-    case 7:
-      divmod_integral(1000000);
-      break;
-    case 6:
-      divmod_integral(100000);
-      break;
-    case 5:
-      divmod_integral(10000);
-      break;
-    case 4:
-      divmod_integral(1000);
-      break;
-    case 3:
-      divmod_integral(100);
-      break;
-    case 2:
-      divmod_integral(10);
-      break;
-    case 1:
-      digit = integral;
-      integral = 0;
-      break;
-    default:
-      FMT_ASSERT(false, "invalid number of digits");
-    }
-    --exp;
-    auto remainder = (static_cast<uint64_t>(integral) << -one.e) + fractional;
-    auto result = handler.on_digit(static_cast<char>('0' + digit),
-                                   impl_data::power_of_10_64[exp] << -one.e,
-                                   remainder, error, true);
-    if (result != digits::more) return result;
-  } while (exp > 0);
-  // Generate digits for the fractional part.
-  for (;;) {
-    fractional *= 10;
-    error *= 10;
-    char digit = static_cast<char>('0' + (fractional >> -one.e));
-    fractional &= one.f - 1;
-    --exp;
-    auto result = handler.on_digit(digit, one.f, fractional, error, false);
-    if (result != digits::more) return result;
-  }
-}
-
-// A 128-bit integer type used internally,
-struct uint128_wrapper {
-  uint128_wrapper() = default;
-
-#if FMT_USE_INT128
-  uint128_t internal_;
-
-  constexpr uint128_wrapper(uint64_t high, uint64_t low) FMT_NOEXCEPT
-      : internal_{static_cast<uint128_t>(low) |
-                  (static_cast<uint128_t>(high) << 64)} {}
-
-  constexpr uint128_wrapper(uint128_t u) : internal_{u} {}
-
-  constexpr uint64_t high() const FMT_NOEXCEPT {
-    return uint64_t(internal_ >> 64);
-  }
-  constexpr uint64_t low() const FMT_NOEXCEPT { return uint64_t(internal_); }
-
-  uint128_wrapper& operator+=(uint64_t n) FMT_NOEXCEPT {
-    internal_ += n;
-    return *this;
-  }
-#else
-  uint64_t high_;
-  uint64_t low_;
-
-  constexpr uint128_wrapper(uint64_t high, uint64_t low) FMT_NOEXCEPT
-      : high_{high},
-        low_{low} {}
-
-  constexpr uint64_t high() const FMT_NOEXCEPT { return high_; }
-  constexpr uint64_t low() const FMT_NOEXCEPT { return low_; }
-
-  uint128_wrapper& operator+=(uint64_t n) FMT_NOEXCEPT {
-#  if defined(_MSC_VER) && defined(_M_X64)
-    unsigned char carry = _addcarry_u64(0, low_, n, &low_);
-    _addcarry_u64(carry, high_, 0, &high_);
-    return *this;
-#  else
-    uint64_t sum = low_ + n;
-    high_ += (sum < low_ ? 1 : 0);
-    low_ = sum;
-    return *this;
-#  endif
-  }
-#endif
-};
-
-// Implementation of Dragonbox algorithm: https://github.com/jk-jeon/dragonbox.
-namespace dragonbox {
-// Computes 128-bit result of multiplication of two 64-bit unsigned integers.
-inline uint128_wrapper umul128(uint64_t x, uint64_t y) FMT_NOEXCEPT {
-#if FMT_USE_INT128
-  return static_cast<uint128_t>(x) * static_cast<uint128_t>(y);
-#elif defined(_MSC_VER) && defined(_M_X64)
-  uint128_wrapper result;
-  result.low_ = _umul128(x, y, &result.high_);
-  return result;
-#else
-  const uint64_t mask = (uint64_t(1) << 32) - uint64_t(1);
-
-  uint64_t a = x >> 32;
-  uint64_t b = x & mask;
-  uint64_t c = y >> 32;
-  uint64_t d = y & mask;
-
-  uint64_t ac = a * c;
-  uint64_t bc = b * c;
-  uint64_t ad = a * d;
-  uint64_t bd = b * d;
-
-  uint64_t intermediate = (bd >> 32) + (ad & mask) + (bc & mask);
-
-  return {ac + (intermediate >> 32) + (ad >> 32) + (bc >> 32),
-          (intermediate << 32) + (bd & mask)};
-#endif
-}
-
-// Computes upper 64 bits of multiplication of two 64-bit unsigned integers.
-inline uint64_t umul128_upper64(uint64_t x, uint64_t y) FMT_NOEXCEPT {
-#if FMT_USE_INT128
-  auto p = static_cast<uint128_t>(x) * static_cast<uint128_t>(y);
-  return static_cast<uint64_t>(p >> 64);
-#elif defined(_MSC_VER) && defined(_M_X64)
-  return __umulh(x, y);
-#else
-  return umul128(x, y).high();
-#endif
-}
-
-// Computes upper 64 bits of multiplication of a 64-bit unsigned integer and a
-// 128-bit unsigned integer.
-inline uint64_t umul192_upper64(uint64_t x, uint128_wrapper y) FMT_NOEXCEPT {
-  uint128_wrapper g0 = umul128(x, y.high());
-  g0 += umul128_upper64(x, y.low());
-  return g0.high();
-}
-
-// Computes upper 32 bits of multiplication of a 32-bit unsigned integer and a
-// 64-bit unsigned integer.
-inline uint32_t umul96_upper32(uint32_t x, uint64_t y) FMT_NOEXCEPT {
-  return static_cast<uint32_t>(umul128_upper64(x, y));
-}
-
-// Computes middle 64 bits of multiplication of a 64-bit unsigned integer and a
-// 128-bit unsigned integer.
-inline uint64_t umul192_middle64(uint64_t x, uint128_wrapper y) FMT_NOEXCEPT {
-  uint64_t g01 = x * y.high();
-  uint64_t g10 = umul128_upper64(x, y.low());
-  return g01 + g10;
-}
-
-// Computes lower 64 bits of multiplication of a 32-bit unsigned integer and a
-// 64-bit unsigned integer.
-inline uint64_t umul96_lower64(uint32_t x, uint64_t y) FMT_NOEXCEPT {
-  return x * y;
-}
-
-// Computes floor(log10(pow(2, e))) for e in [-1700, 1700] using the method from
-// https://fmt.dev/papers/Grisu-Exact.pdf#page=5, section 3.4.
-inline int floor_log10_pow2(int e) FMT_NOEXCEPT {
-  FMT_ASSERT(e <= 1700 && e >= -1700, "too large exponent");
-  const int shift = 22;
-  return (e * static_cast<int>(log10_2_significand >> (64 - shift))) >> shift;
-}
-
-// Various fast log computations.
-inline int floor_log2_pow10(int e) FMT_NOEXCEPT {
-  FMT_ASSERT(e <= 1233 && e >= -1233, "too large exponent");
-  const uint64_t log2_10_integer_part = 3;
-  const uint64_t log2_10_fractional_digits = 0x5269e12f346e2bf9;
-  const int shift_amount = 19;
-  return (e * static_cast<int>(
-                  (log2_10_integer_part << shift_amount) |
-                  (log2_10_fractional_digits >> (64 - shift_amount)))) >>
-         shift_amount;
-}
-inline int floor_log10_pow2_minus_log10_4_over_3(int e) FMT_NOEXCEPT {
-  FMT_ASSERT(e <= 1700 && e >= -1700, "too large exponent");
-  const uint64_t log10_4_over_3_fractional_digits = 0x1ffbfc2bbc780375;
-  const int shift_amount = 22;
-  return (e * static_cast<int>(log10_2_significand >> (64 - shift_amount)) -
-          static_cast<int>(log10_4_over_3_fractional_digits >>
-                           (64 - shift_amount))) >>
-         shift_amount;
-}
-
-// Returns true iff x is divisible by pow(2, exp).
-inline bool divisible_by_power_of_2(uint32_t x, int exp) FMT_NOEXCEPT {
-  FMT_ASSERT(exp >= 1, "");
-  FMT_ASSERT(x != 0, "");
-#ifdef FMT_BUILTIN_CTZ
-  return FMT_BUILTIN_CTZ(x) >= exp;
-#else
-  return exp < num_bits<uint32_t>() && x == ((x >> exp) << exp);
-#endif
-}
-inline bool divisible_by_power_of_2(uint64_t x, int exp) FMT_NOEXCEPT {
-  FMT_ASSERT(exp >= 1, "");
-  FMT_ASSERT(x != 0, "");
-#ifdef FMT_BUILTIN_CTZLL
-  return FMT_BUILTIN_CTZLL(x) >= exp;
-#else
-  return exp < num_bits<uint64_t>() && x == ((x >> exp) << exp);
-#endif
-}
-
-// Table entry type for divisibility test.
-template <typename T> struct divtest_table_entry {
-  T mod_inv;
-  T max_quotient;
-};
-
-// Returns true iff x is divisible by pow(5, exp).
-inline bool divisible_by_power_of_5(uint32_t x, int exp) FMT_NOEXCEPT {
-  FMT_ASSERT(exp <= 10, "too large exponent");
-  static constexpr const divtest_table_entry<uint32_t> divtest_table[] = {
-      {0x00000001, 0xffffffff}, {0xcccccccd, 0x33333333},
-      {0xc28f5c29, 0x0a3d70a3}, {0x26e978d5, 0x020c49ba},
-      {0x3afb7e91, 0x0068db8b}, {0x0bcbe61d, 0x0014f8b5},
-      {0x68c26139, 0x000431bd}, {0xae8d46a5, 0x0000d6bf},
-      {0x22e90e21, 0x00002af3}, {0x3a2e9c6d, 0x00000897},
-      {0x3ed61f49, 0x000001b7}};
-  return x * divtest_table[exp].mod_inv <= divtest_table[exp].max_quotient;
-}
-inline bool divisible_by_power_of_5(uint64_t x, int exp) FMT_NOEXCEPT {
-  FMT_ASSERT(exp <= 23, "too large exponent");
-  static constexpr const divtest_table_entry<uint64_t> divtest_table[] = {
-      {0x0000000000000001, 0xffffffffffffffff},
-      {0xcccccccccccccccd, 0x3333333333333333},
-      {0x8f5c28f5c28f5c29, 0x0a3d70a3d70a3d70},
-      {0x1cac083126e978d5, 0x020c49ba5e353f7c},
-      {0xd288ce703afb7e91, 0x0068db8bac710cb2},
-      {0x5d4e8fb00bcbe61d, 0x0014f8b588e368f0},
-      {0x790fb65668c26139, 0x000431bde82d7b63},
-      {0xe5032477ae8d46a5, 0x0000d6bf94d5e57a},
-      {0xc767074b22e90e21, 0x00002af31dc46118},
-      {0x8e47ce423a2e9c6d, 0x0000089705f4136b},
-      {0x4fa7f60d3ed61f49, 0x000001b7cdfd9d7b},
-      {0x0fee64690c913975, 0x00000057f5ff85e5},
-      {0x3662e0e1cf503eb1, 0x000000119799812d},
-      {0xa47a2cf9f6433fbd, 0x0000000384b84d09},
-      {0x54186f653140a659, 0x00000000b424dc35},
-      {0x7738164770402145, 0x0000000024075f3d},
-      {0xe4a4d1417cd9a041, 0x000000000734aca5},
-      {0xc75429d9e5c5200d, 0x000000000170ef54},
-      {0xc1773b91fac10669, 0x000000000049c977},
-      {0x26b172506559ce15, 0x00000000000ec1e4},
-      {0xd489e3a9addec2d1, 0x000000000002f394},
-      {0x90e860bb892c8d5d, 0x000000000000971d},
-      {0x502e79bf1b6f4f79, 0x0000000000001e39},
-      {0xdcd618596be30fe5, 0x000000000000060b}};
-  return x * divtest_table[exp].mod_inv <= divtest_table[exp].max_quotient;
-}
-
-// Replaces n by floor(n / pow(5, N)) returning true if and only if n is
-// divisible by pow(5, N).
-// Precondition: n <= 2 * pow(5, N + 1).
-template <int N>
-bool check_divisibility_and_divide_by_pow5(uint32_t& n) FMT_NOEXCEPT {
-  static constexpr struct {
-    uint32_t magic_number;
-    int bits_for_comparison;
-    uint32_t threshold;
-    int shift_amount;
-  } infos[] = {{0xcccd, 16, 0x3333, 18}, {0xa429, 8, 0x0a, 20}};
-  constexpr auto info = infos[N - 1];
-  n *= info.magic_number;
-  const uint32_t comparison_mask = (1u << info.bits_for_comparison) - 1;
-  bool result = (n & comparison_mask) <= info.threshold;
-  n >>= info.shift_amount;
-  return result;
-}
-
-// Computes floor(n / pow(10, N)) for small n and N.
-// Precondition: n <= pow(10, N + 1).
-template <int N> uint32_t small_division_by_pow10(uint32_t n) FMT_NOEXCEPT {
-  static constexpr struct {
-    uint32_t magic_number;
-    int shift_amount;
-    uint32_t divisor_times_10;
-  } infos[] = {{0xcccd, 19, 100}, {0xa3d8, 22, 1000}};
-  constexpr auto info = infos[N - 1];
-  FMT_ASSERT(n <= info.divisor_times_10, "n is too large");
-  return n * info.magic_number >> info.shift_amount;
-}
-
-// Computes floor(n / 10^(kappa + 1)) (float)
-inline uint32_t divide_by_10_to_kappa_plus_1(uint32_t n) FMT_NOEXCEPT {
-  return n / float_info<float>::big_divisor;
-}
-// Computes floor(n / 10^(kappa + 1)) (double)
-inline uint64_t divide_by_10_to_kappa_plus_1(uint64_t n) FMT_NOEXCEPT {
-  return umul128_upper64(n, 0x83126e978d4fdf3c) >> 9;
-}
-
-// Various subroutines using pow10 cache
-template <class T> struct cache_accessor;
-
-template <> struct cache_accessor<float> {
-  using carrier_uint = float_info<float>::carrier_uint;
-  using cache_entry_type = uint64_t;
-
-  static uint64_t get_cached_power(int k) FMT_NOEXCEPT {
-    FMT_ASSERT(k >= float_info<float>::min_k && k <= float_info<float>::max_k,
-               "k is out of range");
-    static constexpr const uint64_t pow10_significands[] = {
-        0x81ceb32c4b43fcf5, 0xa2425ff75e14fc32, 0xcad2f7f5359a3b3f,
-        0xfd87b5f28300ca0e, 0x9e74d1b791e07e49, 0xc612062576589ddb,
-        0xf79687aed3eec552, 0x9abe14cd44753b53, 0xc16d9a0095928a28,
-        0xf1c90080baf72cb2, 0x971da05074da7bef, 0xbce5086492111aeb,
-        0xec1e4a7db69561a6, 0x9392ee8e921d5d08, 0xb877aa3236a4b44a,
-        0xe69594bec44de15c, 0x901d7cf73ab0acda, 0xb424dc35095cd810,
-        0xe12e13424bb40e14, 0x8cbccc096f5088cc, 0xafebff0bcb24aaff,
-        0xdbe6fecebdedd5bf, 0x89705f4136b4a598, 0xabcc77118461cefd,
-        0xd6bf94d5e57a42bd, 0x8637bd05af6c69b6, 0xa7c5ac471b478424,
-        0xd1b71758e219652c, 0x83126e978d4fdf3c, 0xa3d70a3d70a3d70b,
-        0xcccccccccccccccd, 0x8000000000000000, 0xa000000000000000,
-        0xc800000000000000, 0xfa00000000000000, 0x9c40000000000000,
-        0xc350000000000000, 0xf424000000000000, 0x9896800000000000,
-        0xbebc200000000000, 0xee6b280000000000, 0x9502f90000000000,
-        0xba43b74000000000, 0xe8d4a51000000000, 0x9184e72a00000000,
-        0xb5e620f480000000, 0xe35fa931a0000000, 0x8e1bc9bf04000000,
-        0xb1a2bc2ec5000000, 0xde0b6b3a76400000, 0x8ac7230489e80000,
-        0xad78ebc5ac620000, 0xd8d726b7177a8000, 0x878678326eac9000,
-        0xa968163f0a57b400, 0xd3c21bcecceda100, 0x84595161401484a0,
-        0xa56fa5b99019a5c8, 0xcecb8f27f4200f3a, 0x813f3978f8940984,
-        0xa18f07d736b90be5, 0xc9f2c9cd04674ede, 0xfc6f7c4045812296,
-        0x9dc5ada82b70b59d, 0xc5371912364ce305, 0xf684df56c3e01bc6,
-        0x9a130b963a6c115c, 0xc097ce7bc90715b3, 0xf0bdc21abb48db20,
-        0x96769950b50d88f4, 0xbc143fa4e250eb31, 0xeb194f8e1ae525fd,
-        0x92efd1b8d0cf37be, 0xb7abc627050305ad, 0xe596b7b0c643c719,
-        0x8f7e32ce7bea5c6f, 0xb35dbf821ae4f38b, 0xe0352f62a19e306e};
-    return pow10_significands[k - float_info<float>::min_k];
-  }
-
-  static carrier_uint compute_mul(carrier_uint u,
-                                  const cache_entry_type& cache) FMT_NOEXCEPT {
-    return umul96_upper32(u, cache);
-  }
-
-  static uint32_t compute_delta(const cache_entry_type& cache,
-                                int beta_minus_1) FMT_NOEXCEPT {
-    return static_cast<uint32_t>(cache >> (64 - 1 - beta_minus_1));
-  }
-
-  static bool compute_mul_parity(carrier_uint two_f,
-                                 const cache_entry_type& cache,
-                                 int beta_minus_1) FMT_NOEXCEPT {
-    FMT_ASSERT(beta_minus_1 >= 1, "");
-    FMT_ASSERT(beta_minus_1 < 64, "");
-
-    return ((umul96_lower64(two_f, cache) >> (64 - beta_minus_1)) & 1) != 0;
-  }
-
-  static carrier_uint compute_left_endpoint_for_shorter_interval_case(
-      const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
-    return static_cast<carrier_uint>(
-        (cache - (cache >> (float_info<float>::significand_bits + 2))) >>
-        (64 - float_info<float>::significand_bits - 1 - beta_minus_1));
-  }
-
-  static carrier_uint compute_right_endpoint_for_shorter_interval_case(
-      const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
-    return static_cast<carrier_uint>(
-        (cache + (cache >> (float_info<float>::significand_bits + 1))) >>
-        (64 - float_info<float>::significand_bits - 1 - beta_minus_1));
-  }
-
-  static carrier_uint compute_round_up_for_shorter_interval_case(
-      const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
-    return (static_cast<carrier_uint>(
-                cache >>
-                (64 - float_info<float>::significand_bits - 2 - beta_minus_1)) +
-            1) /
-           2;
-  }
-};
-
-template <> struct cache_accessor<double> {
-  using carrier_uint = float_info<double>::carrier_uint;
-  using cache_entry_type = uint128_wrapper;
-
-  static uint128_wrapper get_cached_power(int k) FMT_NOEXCEPT {
-    FMT_ASSERT(k >= float_info<double>::min_k && k <= float_info<double>::max_k,
-               "k is out of range");
-
-    static constexpr const uint128_wrapper pow10_significands[] = {
-#if FMT_USE_FULL_CACHE_DRAGONBOX
-      {0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
-      {0x9faacf3df73609b1, 0x77b191618c54e9ad},
-      {0xc795830d75038c1d, 0xd59df5b9ef6a2418},
-      {0xf97ae3d0d2446f25, 0x4b0573286b44ad1e},
-      {0x9becce62836ac577, 0x4ee367f9430aec33},
-      {0xc2e801fb244576d5, 0x229c41f793cda740},
-      {0xf3a20279ed56d48a, 0x6b43527578c11110},
-      {0x9845418c345644d6, 0x830a13896b78aaaa},
-      {0xbe5691ef416bd60c, 0x23cc986bc656d554},
-      {0xedec366b11c6cb8f, 0x2cbfbe86b7ec8aa9},
-      {0x94b3a202eb1c3f39, 0x7bf7d71432f3d6aa},
-      {0xb9e08a83a5e34f07, 0xdaf5ccd93fb0cc54},
-      {0xe858ad248f5c22c9, 0xd1b3400f8f9cff69},
-      {0x91376c36d99995be, 0x23100809b9c21fa2},
-      {0xb58547448ffffb2d, 0xabd40a0c2832a78b},
-      {0xe2e69915b3fff9f9, 0x16c90c8f323f516d},
-      {0x8dd01fad907ffc3b, 0xae3da7d97f6792e4},
-      {0xb1442798f49ffb4a, 0x99cd11cfdf41779d},
-      {0xdd95317f31c7fa1d, 0x40405643d711d584},
-      {0x8a7d3eef7f1cfc52, 0x482835ea666b2573},
-      {0xad1c8eab5ee43b66, 0xda3243650005eed0},
-      {0xd863b256369d4a40, 0x90bed43e40076a83},
-      {0x873e4f75e2224e68, 0x5a7744a6e804a292},
-      {0xa90de3535aaae202, 0x711515d0a205cb37},
-      {0xd3515c2831559a83, 0x0d5a5b44ca873e04},
-      {0x8412d9991ed58091, 0xe858790afe9486c3},
-      {0xa5178fff668ae0b6, 0x626e974dbe39a873},
-      {0xce5d73ff402d98e3, 0xfb0a3d212dc81290},
-      {0x80fa687f881c7f8e, 0x7ce66634bc9d0b9a},
-      {0xa139029f6a239f72, 0x1c1fffc1ebc44e81},
-      {0xc987434744ac874e, 0xa327ffb266b56221},
-      {0xfbe9141915d7a922, 0x4bf1ff9f0062baa9},
-      {0x9d71ac8fada6c9b5, 0x6f773fc3603db4aa},
-      {0xc4ce17b399107c22, 0xcb550fb4384d21d4},
-      {0xf6019da07f549b2b, 0x7e2a53a146606a49},
-      {0x99c102844f94e0fb, 0x2eda7444cbfc426e},
-      {0xc0314325637a1939, 0xfa911155fefb5309},
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-      {0x95527a5202df0ccb, 0x0f37801e0c43ebc8},
-      {0xbaa718e68396cffd, 0xd30560258f54e6ba},
-      {0xe950df20247c83fd, 0x47c6b82ef32a2069},
-      {0x91d28b7416cdd27e, 0x4cdc331d57fa5441},
-      {0xb6472e511c81471d, 0xe0133fe4adf8e952},
-      {0xe3d8f9e563a198e5, 0x58180fddd97723a6},
-      {0x8e679c2f5e44ff8f, 0x570f09eaa7ea7648},
-      {0xb201833b35d63f73, 0x2cd2cc6551e513da},
-      {0xde81e40a034bcf4f, 0xf8077f7ea65e58d1},
-      {0x8b112e86420f6191, 0xfb04afaf27faf782},
-      {0xadd57a27d29339f6, 0x79c5db9af1f9b563},
-      {0xd94ad8b1c7380874, 0x18375281ae7822bc},
-      {0x87cec76f1c830548, 0x8f2293910d0b15b5},
-      {0xa9c2794ae3a3c69a, 0xb2eb3875504ddb22},
-      {0xd433179d9c8cb841, 0x5fa60692a46151eb},
-      {0x849feec281d7f328, 0xdbc7c41ba6bcd333},
-      {0xa5c7ea73224deff3, 0x12b9b522906c0800},
-      {0xcf39e50feae16bef, 0xd768226b34870a00},
-      {0x81842f29f2cce375, 0xe6a1158300d46640},
-      {0xa1e53af46f801c53, 0x60495ae3c1097fd0},
-      {0xca5e89b18b602368, 0x385bb19cb14bdfc4},
-      {0xfcf62c1dee382c42, 0x46729e03dd9ed7b5},
-      {0x9e19db92b4e31ba9, 0x6c07a2c26a8346d1},
-      {0xc5a05277621be293, 0xc7098b7305241885},
-      { 0xf70867153aa2db38,
-        0xb8cbee4fc66d1ea7 }
-#else
-      {0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
-      {0xce5d73ff402d98e3, 0xfb0a3d212dc81290},
-      {0xa6b34ad8c9dfc06f, 0xf42faa48c0ea481f},
-      {0x86a8d39ef77164bc, 0xae5dff9c02033198},
-      {0xd98ddaee19068c76, 0x3badd624dd9b0958},
-      {0xafbd2350644eeacf, 0xe5d1929ef90898fb},
-      {0x8df5efabc5979c8f, 0xca8d3ffa1ef463c2},
-      {0xe55990879ddcaabd, 0xcc420a6a101d0516},
-      {0xb94470938fa89bce, 0xf808e40e8d5b3e6a},
-      {0x95a8637627989aad, 0xdde7001379a44aa9},
-      {0xf1c90080baf72cb1, 0x5324c68b12dd6339},
-      {0xc350000000000000, 0x0000000000000000},
-      {0x9dc5ada82b70b59d, 0xf020000000000000},
-      {0xfee50b7025c36a08, 0x02f236d04753d5b4},
-      {0xcde6fd5e09abcf26, 0xed4c0226b55e6f86},
-      {0xa6539930bf6bff45, 0x84db8346b786151c},
-      {0x865b86925b9bc5c2, 0x0b8a2392ba45a9b2},
-      {0xd910f7ff28069da4, 0x1b2ba1518094da04},
-      {0xaf58416654a6babb, 0x387ac8d1970027b2},
-      {0x8da471a9de737e24, 0x5ceaecfed289e5d2},
-      {0xe4d5e82392a40515, 0x0fabaf3feaa5334a},
-      {0xb8da1662e7b00a17, 0x3d6a751f3b936243},
-      { 0x95527a5202df0ccb,
-        0x0f37801e0c43ebc8 }
-#endif
-    };
-
-#if FMT_USE_FULL_CACHE_DRAGONBOX
-    return pow10_significands[k - float_info<double>::min_k];
-#else
-    static constexpr const uint64_t powers_of_5_64[] = {
-        0x0000000000000001, 0x0000000000000005, 0x0000000000000019,
-        0x000000000000007d, 0x0000000000000271, 0x0000000000000c35,
-        0x0000000000003d09, 0x000000000001312d, 0x000000000005f5e1,
-        0x00000000001dcd65, 0x00000000009502f9, 0x0000000002e90edd,
-        0x000000000e8d4a51, 0x0000000048c27395, 0x000000016bcc41e9,
-        0x000000071afd498d, 0x0000002386f26fc1, 0x000000b1a2bc2ec5,
-        0x000003782dace9d9, 0x00001158e460913d, 0x000056bc75e2d631,
-        0x0001b1ae4d6e2ef5, 0x000878678326eac9, 0x002a5a058fc295ed,
-        0x00d3c21bcecceda1, 0x0422ca8b0a00a425, 0x14adf4b7320334b9};
-
-    static constexpr const uint32_t pow10_recovery_errors[] = {
-        0x50001400, 0x54044100, 0x54014555, 0x55954415, 0x54115555, 0x00000001,
-        0x50000000, 0x00104000, 0x54010004, 0x05004001, 0x55555544, 0x41545555,
-        0x54040551, 0x15445545, 0x51555514, 0x10000015, 0x00101100, 0x01100015,
-        0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x04450514, 0x45414110,
-        0x55555145, 0x50544050, 0x15040155, 0x11054140, 0x50111514, 0x11451454,
-        0x00400541, 0x00000000, 0x55555450, 0x10056551, 0x10054011, 0x55551014,
-        0x69514555, 0x05151109, 0x00155555};
-
-    static const int compression_ratio = 27;
-
-    // Compute base index.
-    int cache_index = (k - float_info<double>::min_k) / compression_ratio;
-    int kb = cache_index * compression_ratio + float_info<double>::min_k;
-    int offset = k - kb;
-
-    // Get base cache.
-    uint128_wrapper base_cache = pow10_significands[cache_index];
-    if (offset == 0) return base_cache;
-
-    // Compute the required amount of bit-shift.
-    int alpha = floor_log2_pow10(kb + offset) - floor_log2_pow10(kb) - offset;
-    FMT_ASSERT(alpha > 0 && alpha < 64, "shifting error detected");
-
-    // Try to recover the real cache.
-    uint64_t pow5 = powers_of_5_64[offset];
-    uint128_wrapper recovered_cache = umul128(base_cache.high(), pow5);
-    uint128_wrapper middle_low =
-        umul128(base_cache.low() - (kb < 0 ? 1u : 0u), pow5);
-
-    recovered_cache += middle_low.high();
-
-    uint64_t high_to_middle = recovered_cache.high() << (64 - alpha);
-    uint64_t middle_to_low = recovered_cache.low() << (64 - alpha);
-
-    recovered_cache =
-        uint128_wrapper{(recovered_cache.low() >> alpha) | high_to_middle,
-                        ((middle_low.low() >> alpha) | middle_to_low)};
-
-    if (kb < 0) recovered_cache += 1;
-
-    // Get error.
-    int error_idx = (k - float_info<double>::min_k) / 16;
-    uint32_t error = (pow10_recovery_errors[error_idx] >>
-                      ((k - float_info<double>::min_k) % 16) * 2) &
-                     0x3;
-
-    // Add the error back.
-    FMT_ASSERT(recovered_cache.low() + error >= recovered_cache.low(), "");
-    return {recovered_cache.high(), recovered_cache.low() + error};
-#endif
-  }
-
-  static carrier_uint compute_mul(carrier_uint u,
-                                  const cache_entry_type& cache) FMT_NOEXCEPT {
-    return umul192_upper64(u, cache);
-  }
-
-  static uint32_t compute_delta(cache_entry_type const& cache,
-                                int beta_minus_1) FMT_NOEXCEPT {
-    return static_cast<uint32_t>(cache.high() >> (64 - 1 - beta_minus_1));
-  }
-
-  static bool compute_mul_parity(carrier_uint two_f,
-                                 const cache_entry_type& cache,
-                                 int beta_minus_1) FMT_NOEXCEPT {
-    FMT_ASSERT(beta_minus_1 >= 1, "");
-    FMT_ASSERT(beta_minus_1 < 64, "");
-
-    return ((umul192_middle64(two_f, cache) >> (64 - beta_minus_1)) & 1) != 0;
-  }
-
-  static carrier_uint compute_left_endpoint_for_shorter_interval_case(
-      const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
-    return (cache.high() -
-            (cache.high() >> (float_info<double>::significand_bits + 2))) >>
-           (64 - float_info<double>::significand_bits - 1 - beta_minus_1);
-  }
-
-  static carrier_uint compute_right_endpoint_for_shorter_interval_case(
-      const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
-    return (cache.high() +
-            (cache.high() >> (float_info<double>::significand_bits + 1))) >>
-           (64 - float_info<double>::significand_bits - 1 - beta_minus_1);
-  }
-
-  static carrier_uint compute_round_up_for_shorter_interval_case(
-      const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
-    return ((cache.high() >>
-             (64 - float_info<double>::significand_bits - 2 - beta_minus_1)) +
-            1) /
-           2;
-  }
-};
-
-// Various integer checks
-template <class T>
-bool is_left_endpoint_integer_shorter_interval(int exponent) FMT_NOEXCEPT {
-  return exponent >=
-             float_info<
-                 T>::case_shorter_interval_left_endpoint_lower_threshold &&
-         exponent <=
-             float_info<T>::case_shorter_interval_left_endpoint_upper_threshold;
-}
-template <class T>
-bool is_endpoint_integer(typename float_info<T>::carrier_uint two_f,
-                         int exponent, int minus_k) FMT_NOEXCEPT {
-  if (exponent < float_info<T>::case_fc_pm_half_lower_threshold) return false;
-  // For k >= 0.
-  if (exponent <= float_info<T>::case_fc_pm_half_upper_threshold) return true;
-  // For k < 0.
-  if (exponent > float_info<T>::divisibility_check_by_5_threshold) return false;
-  return divisible_by_power_of_5(two_f, minus_k);
-}
-
-template <class T>
-bool is_center_integer(typename float_info<T>::carrier_uint two_f, int exponent,
-                       int minus_k) FMT_NOEXCEPT {
-  // Exponent for 5 is negative.
-  if (exponent > float_info<T>::divisibility_check_by_5_threshold) return false;
-  if (exponent > float_info<T>::case_fc_upper_threshold)
-    return divisible_by_power_of_5(two_f, minus_k);
-  // Both exponents are nonnegative.
-  if (exponent >= float_info<T>::case_fc_lower_threshold) return true;
-  // Exponent for 2 is negative.
-  return divisible_by_power_of_2(two_f, minus_k - exponent + 1);
-}
-
-// Remove trailing zeros from n and return the number of zeros removed (float)
-FMT_INLINE int remove_trailing_zeros(uint32_t& n) FMT_NOEXCEPT {
-#ifdef FMT_BUILTIN_CTZ
-  int t = FMT_BUILTIN_CTZ(n);
-#else
-  int t = ctz(n);
-#endif
-  if (t > float_info<float>::max_trailing_zeros)
-    t = float_info<float>::max_trailing_zeros;
-
-  const uint32_t mod_inv1 = 0xcccccccd;
-  const uint32_t max_quotient1 = 0x33333333;
-  const uint32_t mod_inv2 = 0xc28f5c29;
-  const uint32_t max_quotient2 = 0x0a3d70a3;
-
-  int s = 0;
-  for (; s < t - 1; s += 2) {
-    if (n * mod_inv2 > max_quotient2) break;
-    n *= mod_inv2;
-  }
-  if (s < t && n * mod_inv1 <= max_quotient1) {
-    n *= mod_inv1;
-    ++s;
-  }
-  n >>= s;
-  return s;
-}
-
-// Removes trailing zeros and returns the number of zeros removed (double)
-FMT_INLINE int remove_trailing_zeros(uint64_t& n) FMT_NOEXCEPT {
-#ifdef FMT_BUILTIN_CTZLL
-  int t = FMT_BUILTIN_CTZLL(n);
-#else
-  int t = ctzll(n);
-#endif
-  if (t > float_info<double>::max_trailing_zeros)
-    t = float_info<double>::max_trailing_zeros;
-  // Divide by 10^8 and reduce to 32-bits
-  // Since ret_value.significand <= (2^64 - 1) / 1000 < 10^17,
-  // both of the quotient and the r should fit in 32-bits
-
-  const uint32_t mod_inv1 = 0xcccccccd;
-  const uint32_t max_quotient1 = 0x33333333;
-  const uint64_t mod_inv8 = 0xc767074b22e90e21;
-  const uint64_t max_quotient8 = 0x00002af31dc46118;
-
-  // If the number is divisible by 1'0000'0000, work with the quotient
-  if (t >= 8) {
-    auto quotient_candidate = n * mod_inv8;
-
-    if (quotient_candidate <= max_quotient8) {
-      auto quotient = static_cast<uint32_t>(quotient_candidate >> 8);
-
-      int s = 8;
-      for (; s < t; ++s) {
-        if (quotient * mod_inv1 > max_quotient1) break;
-        quotient *= mod_inv1;
-      }
-      quotient >>= (s - 8);
-      n = quotient;
-      return s;
-    }
-  }
-
-  // Otherwise, work with the remainder
-  auto quotient = static_cast<uint32_t>(n / 100000000);
-  auto remainder = static_cast<uint32_t>(n - 100000000 * quotient);
-
-  if (t == 0 || remainder * mod_inv1 > max_quotient1) {
-    return 0;
-  }
-  remainder *= mod_inv1;
-
-  if (t == 1 || remainder * mod_inv1 > max_quotient1) {
-    n = (remainder >> 1) + quotient * 10000000ull;
-    return 1;
-  }
-  remainder *= mod_inv1;
-
-  if (t == 2 || remainder * mod_inv1 > max_quotient1) {
-    n = (remainder >> 2) + quotient * 1000000ull;
-    return 2;
-  }
-  remainder *= mod_inv1;
-
-  if (t == 3 || remainder * mod_inv1 > max_quotient1) {
-    n = (remainder >> 3) + quotient * 100000ull;
-    return 3;
-  }
-  remainder *= mod_inv1;
-
-  if (t == 4 || remainder * mod_inv1 > max_quotient1) {
-    n = (remainder >> 4) + quotient * 10000ull;
-    return 4;
-  }
-  remainder *= mod_inv1;
-
-  if (t == 5 || remainder * mod_inv1 > max_quotient1) {
-    n = (remainder >> 5) + quotient * 1000ull;
-    return 5;
-  }
-  remainder *= mod_inv1;
-
-  if (t == 6 || remainder * mod_inv1 > max_quotient1) {
-    n = (remainder >> 6) + quotient * 100ull;
-    return 6;
-  }
-  remainder *= mod_inv1;
-
-  n = (remainder >> 7) + quotient * 10ull;
-  return 7;
-}
-
-// The main algorithm for shorter interval case
-template <class T>
-FMT_INLINE decimal_fp<T> shorter_interval_case(int exponent) FMT_NOEXCEPT {
-  decimal_fp<T> ret_value;
-  // Compute k and beta
-  const int minus_k = floor_log10_pow2_minus_log10_4_over_3(exponent);
-  const int beta_minus_1 = exponent + floor_log2_pow10(-minus_k);
-
-  // Compute xi and zi
-  using cache_entry_type = typename cache_accessor<T>::cache_entry_type;
-  const cache_entry_type cache = cache_accessor<T>::get_cached_power(-minus_k);
-
-  auto xi = cache_accessor<T>::compute_left_endpoint_for_shorter_interval_case(
-      cache, beta_minus_1);
-  auto zi = cache_accessor<T>::compute_right_endpoint_for_shorter_interval_case(
-      cache, beta_minus_1);
-
-  // If the left endpoint is not an integer, increase it
-  if (!is_left_endpoint_integer_shorter_interval<T>(exponent)) ++xi;
-
-  // Try bigger divisor
-  ret_value.significand = zi / 10;
-
-  // If succeed, remove trailing zeros if necessary and return
-  if (ret_value.significand * 10 >= xi) {
-    ret_value.exponent = minus_k + 1;
-    ret_value.exponent += remove_trailing_zeros(ret_value.significand);
-    return ret_value;
-  }
-
-  // Otherwise, compute the round-up of y
-  ret_value.significand =
-      cache_accessor<T>::compute_round_up_for_shorter_interval_case(
-          cache, beta_minus_1);
-  ret_value.exponent = minus_k;
-
-  // When tie occurs, choose one of them according to the rule
-  if (exponent >= float_info<T>::shorter_interval_tie_lower_threshold &&
-      exponent <= float_info<T>::shorter_interval_tie_upper_threshold) {
-    ret_value.significand = ret_value.significand % 2 == 0
-                                ? ret_value.significand
-                                : ret_value.significand - 1;
-  } else if (ret_value.significand < xi) {
-    ++ret_value.significand;
-  }
-  return ret_value;
-}
-
-template <typename T> decimal_fp<T> to_decimal(T x) FMT_NOEXCEPT {
-  // Step 1: integer promotion & Schubfach multiplier calculation.
-
-  using carrier_uint = typename float_info<T>::carrier_uint;
-  using cache_entry_type = typename cache_accessor<T>::cache_entry_type;
-  auto br = bit_cast<carrier_uint>(x);
-
-  // Extract significand bits and exponent bits.
-  const carrier_uint significand_mask =
-      (static_cast<carrier_uint>(1) << float_info<T>::significand_bits) - 1;
-  carrier_uint significand = (br & significand_mask);
-  int exponent = static_cast<int>((br & exponent_mask<T>()) >>
-                                  float_info<T>::significand_bits);
-
-  if (exponent != 0) {  // Check if normal.
-    exponent += float_info<T>::exponent_bias - float_info<T>::significand_bits;
-
-    // Shorter interval case; proceed like Schubfach.
-    if (significand == 0) return shorter_interval_case<T>(exponent);
-
-    significand |=
-        (static_cast<carrier_uint>(1) << float_info<T>::significand_bits);
-  } else {
-    // Subnormal case; the interval is always regular.
-    if (significand == 0) return {0, 0};
-    exponent = float_info<T>::min_exponent - float_info<T>::significand_bits;
-  }
-
-  const bool include_left_endpoint = (significand % 2 == 0);
-  const bool include_right_endpoint = include_left_endpoint;
-
-  // Compute k and beta.
-  const int minus_k = floor_log10_pow2(exponent) - float_info<T>::kappa;
-  const cache_entry_type cache = cache_accessor<T>::get_cached_power(-minus_k);
-  const int beta_minus_1 = exponent + floor_log2_pow10(-minus_k);
-
-  // Compute zi and deltai
-  // 10^kappa <= deltai < 10^(kappa + 1)
-  const uint32_t deltai = cache_accessor<T>::compute_delta(cache, beta_minus_1);
-  const carrier_uint two_fc = significand << 1;
-  const carrier_uint two_fr = two_fc | 1;
-  const carrier_uint zi =
-      cache_accessor<T>::compute_mul(two_fr << beta_minus_1, cache);
-
-  // Step 2: Try larger divisor; remove trailing zeros if necessary
-
-  // Using an upper bound on zi, we might be able to optimize the division
-  // better than the compiler; we are computing zi / big_divisor here
-  decimal_fp<T> ret_value;
-  ret_value.significand = divide_by_10_to_kappa_plus_1(zi);
-  uint32_t r = static_cast<uint32_t>(zi - float_info<T>::big_divisor *
-                                              ret_value.significand);
-
-  if (r > deltai) {
-    goto small_divisor_case_label;
-  } else if (r < deltai) {
-    // Exclude the right endpoint if necessary
-    if (r == 0 && !include_right_endpoint &&
-        is_endpoint_integer<T>(two_fr, exponent, minus_k)) {
-      --ret_value.significand;
-      r = float_info<T>::big_divisor;
-      goto small_divisor_case_label;
-    }
-  } else {
-    // r == deltai; compare fractional parts
-    // Check conditions in the order different from the paper
-    // to take advantage of short-circuiting
-    const carrier_uint two_fl = two_fc - 1;
-    if ((!include_left_endpoint ||
-         !is_endpoint_integer<T>(two_fl, exponent, minus_k)) &&
-        !cache_accessor<T>::compute_mul_parity(two_fl, cache, beta_minus_1)) {
-      goto small_divisor_case_label;
-    }
-  }
-  ret_value.exponent = minus_k + float_info<T>::kappa + 1;
-
-  // We may need to remove trailing zeros
-  ret_value.exponent += remove_trailing_zeros(ret_value.significand);
-  return ret_value;
-
-  // Step 3: Find the significand with the smaller divisor
-
-small_divisor_case_label:
-  ret_value.significand *= 10;
-  ret_value.exponent = minus_k + float_info<T>::kappa;
-
-  const uint32_t mask = (1u << float_info<T>::kappa) - 1;
-  auto dist = r - (deltai / 2) + (float_info<T>::small_divisor / 2);
-
-  // Is dist divisible by 2^kappa?
-  if ((dist & mask) == 0) {
-    const bool approx_y_parity =
-        ((dist ^ (float_info<T>::small_divisor / 2)) & 1) != 0;
-    dist >>= float_info<T>::kappa;
-
-    // Is dist divisible by 5^kappa?
-    if (check_divisibility_and_divide_by_pow5<float_info<T>::kappa>(dist)) {
-      ret_value.significand += dist;
-
-      // Check z^(f) >= epsilon^(f)
-      // We have either yi == zi - epsiloni or yi == (zi - epsiloni) - 1,
-      // where yi == zi - epsiloni if and only if z^(f) >= epsilon^(f)
-      // Since there are only 2 possibilities, we only need to care about the
-      // parity. Also, zi and r should have the same parity since the divisor
-      // is an even number
-      if (cache_accessor<T>::compute_mul_parity(two_fc, cache, beta_minus_1) !=
-          approx_y_parity) {
-        --ret_value.significand;
-      } else {
-        // If z^(f) >= epsilon^(f), we might have a tie
-        // when z^(f) == epsilon^(f), or equivalently, when y is an integer
-        if (is_center_integer<T>(two_fc, exponent, minus_k)) {
-          ret_value.significand = ret_value.significand % 2 == 0
-                                      ? ret_value.significand
-                                      : ret_value.significand - 1;
-        }
-      }
-    }
-    // Is dist not divisible by 5^kappa?
-    else {
-      ret_value.significand += dist;
-    }
-  }
-  // Is dist not divisible by 2^kappa?
-  else {
-    // Since we know dist is small, we might be able to optimize the division
-    // better than the compiler; we are computing dist / small_divisor here
-    ret_value.significand +=
-        small_division_by_pow10<float_info<T>::kappa>(dist);
-  }
-  return ret_value;
-}
-}  // namespace dragonbox
-
-// Formats a floating-point number using a variation of the Fixed-Precision
-// Positive Floating-Point Printout ((FPP)^2) algorithm by Steele & White:
-// https://fmt.dev/papers/p372-steele.pdf.
-FMT_CONSTEXPR20 inline void format_dragon(fp value, bool is_predecessor_closer,
-                                          int num_digits, buffer<char>& buf,
-                                          int& exp10) {
-  bigint numerator;    // 2 * R in (FPP)^2.
-  bigint denominator;  // 2 * S in (FPP)^2.
-  // lower and upper are differences between value and corresponding boundaries.
-  bigint lower;             // (M^- in (FPP)^2).
-  bigint upper_store;       // upper's value if different from lower.
-  bigint* upper = nullptr;  // (M^+ in (FPP)^2).
-  // Shift numerator and denominator by an extra bit or two (if lower boundary
-  // is closer) to make lower and upper integers. This eliminates multiplication
-  // by 2 during later computations.
-  int shift = is_predecessor_closer ? 2 : 1;
-  uint64_t significand = value.f << shift;
-  if (value.e >= 0) {
-    numerator.assign(significand);
-    numerator <<= value.e;
-    lower.assign(1);
-    lower <<= value.e;
-    if (shift != 1) {
-      upper_store.assign(1);
-      upper_store <<= value.e + 1;
-      upper = &upper_store;
-    }
-    denominator.assign_pow10(exp10);
-    denominator <<= shift;
-  } else if (exp10 < 0) {
-    numerator.assign_pow10(-exp10);
-    lower.assign(numerator);
-    if (shift != 1) {
-      upper_store.assign(numerator);
-      upper_store <<= 1;
-      upper = &upper_store;
-    }
-    numerator *= significand;
-    denominator.assign(1);
-    denominator <<= shift - value.e;
-  } else {
-    numerator.assign(significand);
-    denominator.assign_pow10(exp10);
-    denominator <<= shift - value.e;
-    lower.assign(1);
-    if (shift != 1) {
-      upper_store.assign(1ULL << 1);
-      upper = &upper_store;
-    }
-  }
-  // Invariant: value == (numerator / denominator) * pow(10, exp10).
-  if (num_digits < 0) {
-    // Generate the shortest representation.
-    if (!upper) upper = &lower;
-    bool even = (value.f & 1) == 0;
-    num_digits = 0;
-    char* data = buf.data();
-    for (;;) {
-      int digit = numerator.divmod_assign(denominator);
-      bool low = compare(numerator, lower) - even < 0;  // numerator <[=] lower.
-      // numerator + upper >[=] pow10:
-      bool high = add_compare(numerator, *upper, denominator) + even > 0;
-      data[num_digits++] = static_cast<char>('0' + digit);
-      if (low || high) {
-        if (!low) {
-          ++data[num_digits - 1];
-        } else if (high) {
-          int result = add_compare(numerator, numerator, denominator);
-          // Round half to even.
-          if (result > 0 || (result == 0 && (digit % 2) != 0))
-            ++data[num_digits - 1];
-        }
-        buf.try_resize(to_unsigned(num_digits));
-        exp10 -= num_digits - 1;
-        return;
-      }
-      numerator *= 10;
-      lower *= 10;
-      if (upper != &lower) *upper *= 10;
-    }
-  }
-  // Generate the given number of digits.
-  exp10 -= num_digits - 1;
-  if (num_digits == 0) {
-    denominator *= 10;
-    auto digit = add_compare(numerator, numerator, denominator) > 0 ? '1' : '0';
-    buf.push_back(digit);
-    return;
-  }
-  buf.try_resize(to_unsigned(num_digits));
-  for (int i = 0; i < num_digits - 1; ++i) {
-    int digit = numerator.divmod_assign(denominator);
-    buf[i] = static_cast<char>('0' + digit);
-    numerator *= 10;
-  }
-  int digit = numerator.divmod_assign(denominator);
-  auto result = add_compare(numerator, numerator, denominator);
-  if (result > 0 || (result == 0 && (digit % 2) != 0)) {
-    if (digit == 9) {
-      const auto overflow = '0' + 10;
-      buf[num_digits - 1] = overflow;
-      // Propagate the carry.
-      for (int i = num_digits - 1; i > 0 && buf[i] == overflow; --i) {
-        buf[i] = '0';
-        ++buf[i - 1];
-      }
-      if (buf[0] == overflow) {
-        buf[0] = '1';
-        ++exp10;
-      }
-      return;
-    }
-    ++digit;
-  }
-  buf[num_digits - 1] = static_cast<char>('0' + digit);
-}
-
-template <typename Float>
-FMT_HEADER_ONLY_CONSTEXPR20 int format_float(Float value, int precision,
-                                             float_specs specs,
-                                             buffer<char>& buf) {
-  // float is passed as double to reduce the number of instantiations.
-  static_assert(!std::is_same<Float, float>::value, "");
-  FMT_ASSERT(value >= 0, "value is negative");
-
-  const bool fixed = specs.format == float_format::fixed;
-  if (value <= 0) {  // <= instead of == to silence a warning.
-    if (precision <= 0 || !fixed) {
-      buf.push_back('0');
-      return 0;
-    }
-    buf.try_resize(to_unsigned(precision));
-    fill_n(buf.data(), precision, '0');
-    return -precision;
-  }
-
-  if (specs.fallback) return snprintf_float(value, precision, specs, buf);
-
-  if (!is_constant_evaluated() && precision < 0) {
-    // Use Dragonbox for the shortest format.
-    if (specs.binary32) {
-      auto dec = dragonbox::to_decimal(static_cast<float>(value));
-      write<char>(buffer_appender<char>(buf), dec.significand);
-      return dec.exponent;
-    }
-    auto dec = dragonbox::to_decimal(static_cast<double>(value));
-    write<char>(buffer_appender<char>(buf), dec.significand);
-    return dec.exponent;
-  }
-
-  int exp = 0;
-  bool use_dragon = true;
-  if (is_fast_float<Float>()) {
-    // Use Grisu + Dragon4 for the given precision:
-    // https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf.
-    const int min_exp = -60;  // alpha in Grisu.
-    int cached_exp10 = 0;     // K in Grisu.
-    fp normalized = normalize(fp(value));
-    const auto cached_pow = get_cached_power(
-        min_exp - (normalized.e + fp::num_significand_bits), cached_exp10);
-    normalized = normalized * cached_pow;
-    gen_digits_handler handler{buf.data(), 0, precision, -cached_exp10, fixed};
-    if (grisu_gen_digits(normalized, 1, exp, handler) != digits::error &&
-        !is_constant_evaluated()) {
-      exp += handler.exp10;
-      buf.try_resize(to_unsigned(handler.size));
-      use_dragon = false;
-    } else {
-      exp += handler.size - cached_exp10 - 1;
-      precision = handler.precision;
-    }
-  }
-  if (use_dragon) {
-    auto f = fp();
-    bool is_predecessor_closer =
-        specs.binary32 ? f.assign(static_cast<float>(value)) : f.assign(value);
-    // Limit precision to the maximum possible number of significant digits in
-    // an IEEE754 double because we don't need to generate zeros.
-    const int max_double_digits = 767;
-    if (precision > max_double_digits) precision = max_double_digits;
-    format_dragon(f, is_predecessor_closer, precision, buf, exp);
-  }
-  if (!fixed && !specs.showpoint) {
-    // Remove trailing zeros.
-    auto num_digits = buf.size();
-    while (num_digits > 0 && buf[num_digits - 1] == '0') {
-      --num_digits;
-      ++exp;
-    }
-    buf.try_resize(num_digits);
-  }
-  return exp;
-}
-
-template <typename T>
-int snprintf_float(T value, int precision, float_specs specs,
-                   buffer<char>& buf) {
-  // Buffer capacity must be non-zero, otherwise MSVC's vsnprintf_s will fail.
-  FMT_ASSERT(buf.capacity() > buf.size(), "empty buffer");
-  static_assert(!std::is_same<T, float>::value, "");
-
-  // Subtract 1 to account for the difference in precision since we use %e for
-  // both general and exponent format.
-  if (specs.format == float_format::general ||
-      specs.format == float_format::exp)
-    precision = (precision >= 0 ? precision : 6) - 1;
-
-  // Build the format string.
-  enum { max_format_size = 7 };  // The longest format is "%#.*Le".
-  char format[max_format_size];
-  char* format_ptr = format;
-  *format_ptr++ = '%';
-  if (specs.showpoint && specs.format == float_format::hex) *format_ptr++ = '#';
-  if (precision >= 0) {
-    *format_ptr++ = '.';
-    *format_ptr++ = '*';
-  }
-  if (std::is_same<T, long double>()) *format_ptr++ = 'L';
-  *format_ptr++ = specs.format != float_format::hex
-                      ? (specs.format == float_format::fixed ? 'f' : 'e')
-                      : (specs.upper ? 'A' : 'a');
-  *format_ptr = '\0';
-
-  // Format using snprintf.
-  auto offset = buf.size();
-  for (;;) {
-    auto begin = buf.data() + offset;
-    auto capacity = buf.capacity() - offset;
-#ifdef FMT_FUZZ
-    if (precision > 100000)
-      throw std::runtime_error(
-          "fuzz mode - avoid large allocation inside snprintf");
-#endif
-    // Suppress the warning about a nonliteral format string.
-    // Cannot use auto because of a bug in MinGW (#1532).
-    int (*snprintf_ptr)(char*, size_t, const char*, ...) = FMT_SNPRINTF;
-    int result = precision >= 0
-                     ? snprintf_ptr(begin, capacity, format, precision, value)
-                     : snprintf_ptr(begin, capacity, format, value);
-    if (result < 0) {
-      // The buffer will grow exponentially.
-      buf.try_reserve(buf.capacity() + 1);
-      continue;
-    }
-    auto size = to_unsigned(result);
-    // Size equal to capacity means that the last character was truncated.
-    if (size >= capacity) {
-      buf.try_reserve(size + offset + 1);  // Add 1 for the terminating '\0'.
-      continue;
-    }
-    auto is_digit = [](char c) { return c >= '0' && c <= '9'; };
-    if (specs.format == float_format::fixed) {
-      if (precision == 0) {
-        buf.try_resize(size);
-        return 0;
-      }
-      // Find and remove the decimal point.
-      auto end = begin + size, p = end;
-      do {
-        --p;
-      } while (is_digit(*p));
-      int fraction_size = static_cast<int>(end - p - 1);
-      std::memmove(p, p + 1, to_unsigned(fraction_size));
-      buf.try_resize(size - 1);
-      return -fraction_size;
-    }
-    if (specs.format == float_format::hex) {
-      buf.try_resize(size + offset);
-      return 0;
-    }
-    // Find and parse the exponent.
-    auto end = begin + size, exp_pos = end;
-    do {
-      --exp_pos;
-    } while (*exp_pos != 'e');
-    char sign = exp_pos[1];
-    FMT_ASSERT(sign == '+' || sign == '-', "");
-    int exp = 0;
-    auto p = exp_pos + 2;  // Skip 'e' and sign.
-    do {
-      FMT_ASSERT(is_digit(*p), "");
-      exp = exp * 10 + (*p++ - '0');
-    } while (p != end);
-    if (sign == '-') exp = -exp;
-    int fraction_size = 0;
-    if (exp_pos != begin + 1) {
-      // Remove trailing zeros.
-      auto fraction_end = exp_pos - 1;
-      while (*fraction_end == '0') --fraction_end;
-      // Move the fractional part left to get rid of the decimal point.
-      fraction_size = static_cast<int>(fraction_end - begin - 1);
-      std::memmove(begin + 1, begin + 2, to_unsigned(fraction_size));
-    }
-    buf.try_resize(to_unsigned(fraction_size) + offset + 1);
-    return exp - fraction_size;
-  }
-}
-}  // namespace detail
-
-template <> struct formatter<detail::bigint> {
-  FMT_CONSTEXPR format_parse_context::iterator parse(
-      format_parse_context& ctx) {
-    return ctx.begin();
-  }
-
-  format_context::iterator format(const detail::bigint& n,
-                                  format_context& ctx) {
-    auto out = ctx.out();
-    bool first = true;
-    for (auto i = n.bigits_.size(); i > 0; --i) {
-      auto value = n.bigits_[i - 1u];
-      if (first) {
-        out = format_to(out, FMT_STRING("{:x}"), value);
-        first = false;
-        continue;
-      }
-      out = format_to(out, FMT_STRING("{:08x}"), value);
-    }
-    if (n.exp_ > 0)
-      out = format_to(out, FMT_STRING("p{}"),
-                      n.exp_ * detail::bigint::bigit_bits);
-    return out;
-  }
-};
-
-FMT_FUNC detail::utf8_to_utf16::utf8_to_utf16(string_view s) {
-  for_each_codepoint(s, [this](uint32_t cp, string_view) {
-    if (cp == invalid_code_point) FMT_THROW(std::runtime_error("invalid utf8"));
-    if (cp <= 0xFFFF) {
-      buffer_.push_back(static_cast<wchar_t>(cp));
-    } else {
-      cp -= 0x10000;
-      buffer_.push_back(static_cast<wchar_t>(0xD800 + (cp >> 10)));
-      buffer_.push_back(static_cast<wchar_t>(0xDC00 + (cp & 0x3FF)));
-    }
-    return true;
-  });
-  buffer_.push_back(0);
-}
-
-FMT_FUNC void format_system_error(detail::buffer<char>& out, int error_code,
-                                  const char* message) FMT_NOEXCEPT {
-  FMT_TRY {
-    auto ec = std::error_code(error_code, std::generic_category());
-    write(std::back_inserter(out), std::system_error(ec, message).what());
-    return;
-  }
-  FMT_CATCH(...) {}
-  format_error_code(out, error_code, message);
-}
-
-FMT_FUNC void report_system_error(int error_code,
-                                  const char* message) FMT_NOEXCEPT {
-  report_error(format_system_error, error_code, message);
-}
-
-// DEPRECATED!
-// This function is defined here and not inline for ABI compatiblity.
-FMT_FUNC void detail::error_handler::on_error(const char* message) {
-  throw_format_error(message);
-}
-
-FMT_FUNC std::string vformat(string_view fmt, format_args args) {
-  // Don't optimize the "{}" case to keep the binary size small and because it
-  // can be better optimized in fmt::format anyway.
-  auto buffer = memory_buffer();
-  detail::vformat_to(buffer, fmt, args);
-  return to_string(buffer);
-}
-
-#ifdef _WIN32
-namespace detail {
-using dword = conditional_t<sizeof(long) == 4, unsigned long, unsigned>;
-extern "C" __declspec(dllimport) int __stdcall WriteConsoleW(  //
-    void*, const void*, dword, dword*, void*);
-}  // namespace detail
-#endif
-
-namespace detail {
-FMT_FUNC void print(std::FILE* f, string_view text) {
-#ifdef _WIN32
-  auto fd = _fileno(f);
-  if (_isatty(fd)) {
-    detail::utf8_to_utf16 u16(string_view(text.data(), text.size()));
-    auto written = detail::dword();
-    if (detail::WriteConsoleW(reinterpret_cast<void*>(_get_osfhandle(fd)),
-                              u16.c_str(), static_cast<uint32_t>(u16.size()),
-                              &written, nullptr)) {
-      return;
-    }
-    // Fallback to fwrite on failure. It can happen if the output has been
-    // redirected to NUL.
-  }
-#endif
-  detail::fwrite_fully(text.data(), 1, text.size(), f);
-}
-}  // namespace detail
-
-FMT_FUNC void vprint(std::FILE* f, string_view format_str, format_args args) {
-  memory_buffer buffer;
-  detail::vformat_to(buffer, format_str, args);
-  detail::print(f, {buffer.data(), buffer.size()});
-}
-
-#ifdef _WIN32
-// Print assuming legacy (non-Unicode) encoding.
-FMT_FUNC void detail::vprint_mojibake(std::FILE* f, string_view format_str,
-                                      format_args args) {
-  memory_buffer buffer;
-  detail::vformat_to(buffer, format_str,
-                     basic_format_args<buffer_context<char>>(args));
-  fwrite_fully(buffer.data(), 1, buffer.size(), f);
-}
-#endif
-
-FMT_FUNC void vprint(string_view format_str, format_args args) {
-  vprint(stdout, format_str, args);
-}
-
-FMT_END_NAMESPACE
-
-#endif  // FMT_FORMAT_INL_H_
diff --git a/3rdparty/fmt/include/fmt/format.h b/3rdparty/fmt/include/fmt/format.h
deleted file mode 100644
index ee69651c..00000000
--- a/3rdparty/fmt/include/fmt/format.h
+++ /dev/null
@@ -1,3104 +0,0 @@
-/*
- Formatting library for C++
-
- Copyright (c) 2012 - present, Victor Zverovich
-
- Permission is hereby granted, free of charge, to any person obtaining
- a copy of this software and associated documentation files (the
- "Software"), to deal in the Software without restriction, including
- without limitation the rights to use, copy, modify, merge, publish,
- distribute, sublicense, and/or sell copies of the Software, and to
- permit persons to whom the Software is furnished to do so, subject to
- the following conditions:
-
- The above copyright notice and this permission notice shall be
- included in all copies or substantial portions of the Software.
-
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
- --- Optional exception to the license ---
-
- As an exception, if, as a result of your compiling your source code, portions
- of this Software are embedded into a machine-executable object form of such
- source code, you may redistribute such embedded portions in such object form
- without including the above copyright and permission notices.
- */
-
-#ifndef FMT_FORMAT_H_
-#define FMT_FORMAT_H_
-
-#include <cmath>         // std::signbit
-#include <cstdint>       // uint32_t
-#include <limits>        // std::numeric_limits
-#include <memory>        // std::uninitialized_copy
-#include <stdexcept>     // std::runtime_error
-#include <system_error>  // std::system_error
-#include <utility>       // std::swap
-
-#ifdef __cpp_lib_bit_cast
-#  include <bit>  // std::bitcast
-#endif
-
-#include "core.h"
-
-#if FMT_GCC_VERSION
-#  define FMT_GCC_VISIBILITY_HIDDEN __attribute__((visibility("hidden")))
-#else
-#  define FMT_GCC_VISIBILITY_HIDDEN
-#endif
-
-#ifdef __NVCC__
-#  define FMT_CUDA_VERSION (__CUDACC_VER_MAJOR__ * 100 + __CUDACC_VER_MINOR__)
-#else
-#  define FMT_CUDA_VERSION 0
-#endif
-
-#ifdef __has_builtin
-#  define FMT_HAS_BUILTIN(x) __has_builtin(x)
-#else
-#  define FMT_HAS_BUILTIN(x) 0
-#endif
-
-#if FMT_GCC_VERSION || FMT_CLANG_VERSION
-#  define FMT_NOINLINE __attribute__((noinline))
-#else
-#  define FMT_NOINLINE
-#endif
-
-#if FMT_MSC_VER
-#  define FMT_MSC_DEFAULT = default
-#else
-#  define FMT_MSC_DEFAULT
-#endif
-
-#ifndef FMT_THROW
-#  if FMT_EXCEPTIONS
-#    if FMT_MSC_VER || FMT_NVCC
-FMT_BEGIN_NAMESPACE
-namespace detail {
-template <typename Exception> inline void do_throw(const Exception& x) {
-  // Silence unreachable code warnings in MSVC and NVCC because these
-  // are nearly impossible to fix in a generic code.
-  volatile bool b = true;
-  if (b) throw x;
-}
-}  // namespace detail
-FMT_END_NAMESPACE
-#      define FMT_THROW(x) detail::do_throw(x)
-#    else
-#      define FMT_THROW(x) throw x
-#    endif
-#  else
-#    define FMT_THROW(x)               \
-      do {                             \
-        FMT_ASSERT(false, (x).what()); \
-      } while (false)
-#  endif
-#endif
-
-#if FMT_EXCEPTIONS
-#  define FMT_TRY try
-#  define FMT_CATCH(x) catch (x)
-#else
-#  define FMT_TRY if (true)
-#  define FMT_CATCH(x) if (false)
-#endif
-
-#ifndef FMT_MAYBE_UNUSED
-#  if FMT_HAS_CPP17_ATTRIBUTE(maybe_unused)
-#    define FMT_MAYBE_UNUSED [[maybe_unused]]
-#  else
-#    define FMT_MAYBE_UNUSED
-#  endif
-#endif
-
-// Workaround broken [[deprecated]] in the Intel, PGI and NVCC compilers.
-#if FMT_ICC_VERSION || defined(__PGI) || FMT_NVCC
-#  define FMT_DEPRECATED_ALIAS
-#else
-#  define FMT_DEPRECATED_ALIAS FMT_DEPRECATED
-#endif
-
-#ifndef FMT_USE_USER_DEFINED_LITERALS
-// EDG based compilers (Intel, NVIDIA, Elbrus, etc), GCC and MSVC support UDLs.
-#  if (FMT_HAS_FEATURE(cxx_user_literals) || FMT_GCC_VERSION >= 407 || \
-       FMT_MSC_VER >= 1900) &&                                         \
-      (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= /* UDL feature */ 480)
-#    define FMT_USE_USER_DEFINED_LITERALS 1
-#  else
-#    define FMT_USE_USER_DEFINED_LITERALS 0
-#  endif
-#endif
-
-// Defining FMT_REDUCE_INT_INSTANTIATIONS to 1, will reduce the number of
-// integer formatter template instantiations to just one by only using the
-// largest integer type. This results in a reduction in binary size but will
-// cause a decrease in integer formatting performance.
-#if !defined(FMT_REDUCE_INT_INSTANTIATIONS)
-#  define FMT_REDUCE_INT_INSTANTIATIONS 0
-#endif
-
-// __builtin_clz is broken in clang with Microsoft CodeGen:
-// https://github.com/fmtlib/fmt/issues/519.
-#if !FMT_MSC_VER
-#  if FMT_HAS_BUILTIN(__builtin_clz) || FMT_GCC_VERSION || FMT_ICC_VERSION
-#    define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
-#  endif
-#  if FMT_HAS_BUILTIN(__builtin_clzll) || FMT_GCC_VERSION || FMT_ICC_VERSION
-#    define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
-#  endif
-#endif
-
-// __builtin_ctz is broken in Intel Compiler Classic on Windows:
-// https://github.com/fmtlib/fmt/issues/2510.
-#ifndef __ICL
-#  if FMT_HAS_BUILTIN(__builtin_ctz) || FMT_GCC_VERSION || FMT_ICC_VERSION
-#    define FMT_BUILTIN_CTZ(n) __builtin_ctz(n)
-#  endif
-#  if FMT_HAS_BUILTIN(__builtin_ctzll) || FMT_GCC_VERSION || FMT_ICC_VERSION
-#    define FMT_BUILTIN_CTZLL(n) __builtin_ctzll(n)
-#  endif
-#endif
-
-#if FMT_MSC_VER
-#  include <intrin.h>  // _BitScanReverse[64], _BitScanForward[64], _umul128
-#endif
-
-// Some compilers masquerade as both MSVC and GCC-likes or otherwise support
-// __builtin_clz and __builtin_clzll, so only define FMT_BUILTIN_CLZ using the
-// MSVC intrinsics if the clz and clzll builtins are not available.
-#if FMT_MSC_VER && !defined(FMT_BUILTIN_CLZLL) && !defined(FMT_BUILTIN_CTZLL)
-FMT_BEGIN_NAMESPACE
-namespace detail {
-// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
-#  if !defined(__clang__)
-#    pragma intrinsic(_BitScanForward)
-#    pragma intrinsic(_BitScanReverse)
-#    if defined(_WIN64)
-#      pragma intrinsic(_BitScanForward64)
-#      pragma intrinsic(_BitScanReverse64)
-#    endif
-#  endif
-
-inline auto clz(uint32_t x) -> int {
-  unsigned long r = 0;
-  _BitScanReverse(&r, x);
-  FMT_ASSERT(x != 0, "");
-  // Static analysis complains about using uninitialized data
-  // "r", but the only way that can happen is if "x" is 0,
-  // which the callers guarantee to not happen.
-  FMT_MSC_WARNING(suppress : 6102)
-  return 31 ^ static_cast<int>(r);
-}
-#  define FMT_BUILTIN_CLZ(n) detail::clz(n)
-
-inline auto clzll(uint64_t x) -> int {
-  unsigned long r = 0;
-#  ifdef _WIN64
-  _BitScanReverse64(&r, x);
-#  else
-  // Scan the high 32 bits.
-  if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32))) return 63 ^ (r + 32);
-  // Scan the low 32 bits.
-  _BitScanReverse(&r, static_cast<uint32_t>(x));
-#  endif
-  FMT_ASSERT(x != 0, "");
-  FMT_MSC_WARNING(suppress : 6102)  // Suppress a bogus static analysis warning.
-  return 63 ^ static_cast<int>(r);
-}
-#  define FMT_BUILTIN_CLZLL(n) detail::clzll(n)
-
-inline auto ctz(uint32_t x) -> int {
-  unsigned long r = 0;
-  _BitScanForward(&r, x);
-  FMT_ASSERT(x != 0, "");
-  FMT_MSC_WARNING(suppress : 6102)  // Suppress a bogus static analysis warning.
-  return static_cast<int>(r);
-}
-#  define FMT_BUILTIN_CTZ(n) detail::ctz(n)
-
-inline auto ctzll(uint64_t x) -> int {
-  unsigned long r = 0;
-  FMT_ASSERT(x != 0, "");
-  FMT_MSC_WARNING(suppress : 6102)  // Suppress a bogus static analysis warning.
-#  ifdef _WIN64
-  _BitScanForward64(&r, x);
-#  else
-  // Scan the low 32 bits.
-  if (_BitScanForward(&r, static_cast<uint32_t>(x))) return static_cast<int>(r);
-  // Scan the high 32 bits.
-  _BitScanForward(&r, static_cast<uint32_t>(x >> 32));
-  r += 32;
-#  endif
-  return static_cast<int>(r);
-}
-#  define FMT_BUILTIN_CTZLL(n) detail::ctzll(n)
-}  // namespace detail
-FMT_END_NAMESPACE
-#endif
-
-#ifdef FMT_HEADER_ONLY
-#  define FMT_HEADER_ONLY_CONSTEXPR20 FMT_CONSTEXPR20
-#else
-#  define FMT_HEADER_ONLY_CONSTEXPR20
-#endif
-
-FMT_BEGIN_NAMESPACE
-namespace detail {
-
-template <typename Streambuf> class formatbuf : public Streambuf {
- private:
-  using char_type = typename Streambuf::char_type;
-  using streamsize = decltype(std::declval<Streambuf>().sputn(nullptr, 0));
-  using int_type = typename Streambuf::int_type;
-  using traits_type = typename Streambuf::traits_type;
-
-  buffer<char_type>& buffer_;
-
- public:
-  explicit formatbuf(buffer<char_type>& buf) : buffer_(buf) {}
-
- protected:
-  // The put area is always empty. This makes the implementation simpler and has
-  // the advantage that the streambuf and the buffer are always in sync and
-  // sputc never writes into uninitialized memory. A disadvantage is that each
-  // call to sputc always results in a (virtual) call to overflow. There is no
-  // disadvantage here for sputn since this always results in a call to xsputn.
-
-  auto overflow(int_type ch) -> int_type override {
-    if (!traits_type::eq_int_type(ch, traits_type::eof()))
-      buffer_.push_back(static_cast<char_type>(ch));
-    return ch;
-  }
-
-  auto xsputn(const char_type* s, streamsize count) -> streamsize override {
-    buffer_.append(s, s + count);
-    return count;
-  }
-};
-
-// Implementation of std::bit_cast for pre-C++20.
-template <typename To, typename From>
-FMT_CONSTEXPR20 auto bit_cast(const From& from) -> To {
-  static_assert(sizeof(To) == sizeof(From), "size mismatch");
-#ifdef __cpp_lib_bit_cast
-  if (is_constant_evaluated()) return std::bit_cast<To>(from);
-#endif
-  auto to = To();
-  std::memcpy(&to, &from, sizeof(to));
-  return to;
-}
-
-inline auto is_big_endian() -> bool {
-#ifdef _WIN32
-  return false;
-#elif defined(__BIG_ENDIAN__)
-  return true;
-#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__)
-  return __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__;
-#else
-  struct bytes {
-    char data[sizeof(int)];
-  };
-  return bit_cast<bytes>(1).data[0] == 0;
-#endif
-}
-
-// A fallback implementation of uintptr_t for systems that lack it.
-struct fallback_uintptr {
-  unsigned char value[sizeof(void*)];
-
-  fallback_uintptr() = default;
-  explicit fallback_uintptr(const void* p) {
-    *this = bit_cast<fallback_uintptr>(p);
-    if (const_check(is_big_endian())) {
-      for (size_t i = 0, j = sizeof(void*) - 1; i < j; ++i, --j)
-        std::swap(value[i], value[j]);
-    }
-  }
-};
-#ifdef UINTPTR_MAX
-using uintptr_t = ::uintptr_t;
-inline auto to_uintptr(const void* p) -> uintptr_t {
-  return bit_cast<uintptr_t>(p);
-}
-#else
-using uintptr_t = fallback_uintptr;
-inline auto to_uintptr(const void* p) -> fallback_uintptr {
-  return fallback_uintptr(p);
-}
-#endif
-
-// Returns the largest possible value for type T. Same as
-// std::numeric_limits<T>::max() but shorter and not affected by the max macro.
-template <typename T> constexpr auto max_value() -> T {
-  return (std::numeric_limits<T>::max)();
-}
-template <typename T> constexpr auto num_bits() -> int {
-  return std::numeric_limits<T>::digits;
-}
-// std::numeric_limits<T>::digits may return 0 for 128-bit ints.
-template <> constexpr auto num_bits<int128_t>() -> int { return 128; }
-template <> constexpr auto num_bits<uint128_t>() -> int { return 128; }
-template <> constexpr auto num_bits<fallback_uintptr>() -> int {
-  return static_cast<int>(sizeof(void*) *
-                          std::numeric_limits<unsigned char>::digits);
-}
-
-FMT_INLINE void assume(bool condition) {
-  (void)condition;
-#if FMT_HAS_BUILTIN(__builtin_assume)
-  __builtin_assume(condition);
-#endif
-}
-
-// An approximation of iterator_t for pre-C++20 systems.
-template <typename T>
-using iterator_t = decltype(std::begin(std::declval<T&>()));
-template <typename T> using sentinel_t = decltype(std::end(std::declval<T&>()));
-
-// A workaround for std::string not having mutable data() until C++17.
-template <typename Char>
-inline auto get_data(std::basic_string<Char>& s) -> Char* {
-  return &s[0];
-}
-template <typename Container>
-inline auto get_data(Container& c) -> typename Container::value_type* {
-  return c.data();
-}
-
-#if defined(_SECURE_SCL) && _SECURE_SCL
-// Make a checked iterator to avoid MSVC warnings.
-template <typename T> using checked_ptr = stdext::checked_array_iterator<T*>;
-template <typename T>
-constexpr auto make_checked(T* p, size_t size) -> checked_ptr<T> {
-  return {p, size};
-}
-#else
-template <typename T> using checked_ptr = T*;
-template <typename T> constexpr auto make_checked(T* p, size_t) -> T* {
-  return p;
-}
-#endif
-
-// Attempts to reserve space for n extra characters in the output range.
-// Returns a pointer to the reserved range or a reference to it.
-template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
-#if FMT_CLANG_VERSION >= 307 && !FMT_ICC_VERSION
-__attribute__((no_sanitize("undefined")))
-#endif
-inline auto
-reserve(std::back_insert_iterator<Container> it, size_t n)
-    -> checked_ptr<typename Container::value_type> {
-  Container& c = get_container(it);
-  size_t size = c.size();
-  c.resize(size + n);
-  return make_checked(get_data(c) + size, n);
-}
-
-template <typename T>
-inline auto reserve(buffer_appender<T> it, size_t n) -> buffer_appender<T> {
-  buffer<T>& buf = get_container(it);
-  buf.try_reserve(buf.size() + n);
-  return it;
-}
-
-template <typename Iterator>
-constexpr auto reserve(Iterator& it, size_t) -> Iterator& {
-  return it;
-}
-
-template <typename OutputIt>
-using reserve_iterator =
-    remove_reference_t<decltype(reserve(std::declval<OutputIt&>(), 0))>;
-
-template <typename T, typename OutputIt>
-constexpr auto to_pointer(OutputIt, size_t) -> T* {
-  return nullptr;
-}
-template <typename T> auto to_pointer(buffer_appender<T> it, size_t n) -> T* {
-  buffer<T>& buf = get_container(it);
-  auto size = buf.size();
-  if (buf.capacity() < size + n) return nullptr;
-  buf.try_resize(size + n);
-  return buf.data() + size;
-}
-
-template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
-inline auto base_iterator(std::back_insert_iterator<Container>& it,
-                          checked_ptr<typename Container::value_type>)
-    -> std::back_insert_iterator<Container> {
-  return it;
-}
-
-template <typename Iterator>
-constexpr auto base_iterator(Iterator, Iterator it) -> Iterator {
-  return it;
-}
-
-// <algorithm> is spectacularly slow to compile in C++20 so use a simple fill_n
-// instead (#1998).
-template <typename OutputIt, typename Size, typename T>
-FMT_CONSTEXPR auto fill_n(OutputIt out, Size count, const T& value)
-    -> OutputIt {
-  for (Size i = 0; i < count; ++i) *out++ = value;
-  return out;
-}
-template <typename T, typename Size>
-FMT_CONSTEXPR20 auto fill_n(T* out, Size count, char value) -> T* {
-  if (is_constant_evaluated()) {
-    return fill_n<T*, Size, T>(out, count, value);
-  }
-  std::memset(out, value, to_unsigned(count));
-  return out + count;
-}
-
-#ifdef __cpp_char8_t
-using char8_type = char8_t;
-#else
-enum char8_type : unsigned char {};
-#endif
-
-template <typename OutChar, typename InputIt, typename OutputIt>
-FMT_CONSTEXPR FMT_NOINLINE auto copy_str_noinline(InputIt begin, InputIt end,
-                                                  OutputIt out) -> OutputIt {
-  return copy_str<OutChar>(begin, end, out);
-}
-
-// A public domain branchless UTF-8 decoder by Christopher Wellons:
-// https://github.com/skeeto/branchless-utf8
-/* Decode the next character, c, from s, reporting errors in e.
- *
- * Since this is a branchless decoder, four bytes will be read from the
- * buffer regardless of the actual length of the next character. This
- * means the buffer _must_ have at least three bytes of zero padding
- * following the end of the data stream.
- *
- * Errors are reported in e, which will be non-zero if the parsed
- * character was somehow invalid: invalid byte sequence, non-canonical
- * encoding, or a surrogate half.
- *
- * The function returns a pointer to the next character. When an error
- * occurs, this pointer will be a guess that depends on the particular
- * error, but it will always advance at least one byte.
- */
-FMT_CONSTEXPR inline auto utf8_decode(const char* s, uint32_t* c, int* e)
-    -> const char* {
-  constexpr const int masks[] = {0x00, 0x7f, 0x1f, 0x0f, 0x07};
-  constexpr const uint32_t mins[] = {4194304, 0, 128, 2048, 65536};
-  constexpr const int shiftc[] = {0, 18, 12, 6, 0};
-  constexpr const int shifte[] = {0, 6, 4, 2, 0};
-
-  int len = code_point_length(s);
-  const char* next = s + len;
-
-  // Assume a four-byte character and load four bytes. Unused bits are
-  // shifted out.
-  *c = uint32_t(s[0] & masks[len]) << 18;
-  *c |= uint32_t(s[1] & 0x3f) << 12;
-  *c |= uint32_t(s[2] & 0x3f) << 6;
-  *c |= uint32_t(s[3] & 0x3f) << 0;
-  *c >>= shiftc[len];
-
-  // Accumulate the various error conditions.
-  using uchar = unsigned char;
-  *e = (*c < mins[len]) << 6;       // non-canonical encoding
-  *e |= ((*c >> 11) == 0x1b) << 7;  // surrogate half?
-  *e |= (*c > 0x10FFFF) << 8;       // out of range?
-  *e |= (uchar(s[1]) & 0xc0) >> 2;
-  *e |= (uchar(s[2]) & 0xc0) >> 4;
-  *e |= uchar(s[3]) >> 6;
-  *e ^= 0x2a;  // top two bits of each tail byte correct?
-  *e >>= shifte[len];
-
-  return next;
-}
-
-constexpr uint32_t invalid_code_point = ~uint32_t();
-
-// Invokes f(cp, sv) for every code point cp in s with sv being the string view
-// corresponding to the code point. cp is invalid_code_point on error.
-template <typename F>
-FMT_CONSTEXPR void for_each_codepoint(string_view s, F f) {
-  auto decode = [f](const char* buf_ptr, const char* ptr) {
-    auto cp = uint32_t();
-    auto error = 0;
-    auto end = utf8_decode(buf_ptr, &cp, &error);
-    bool result = f(error ? invalid_code_point : cp,
-                    string_view(ptr, to_unsigned(end - buf_ptr)));
-    return result ? end : nullptr;
-  };
-  auto p = s.data();
-  const size_t block_size = 4;  // utf8_decode always reads blocks of 4 chars.
-  if (s.size() >= block_size) {
-    for (auto end = p + s.size() - block_size + 1; p < end;) {
-      p = decode(p, p);
-      if (!p) return;
-    }
-  }
-  if (auto num_chars_left = s.data() + s.size() - p) {
-    char buf[2 * block_size - 1] = {};
-    copy_str<char>(p, p + num_chars_left, buf);
-    const char* buf_ptr = buf;
-    do {
-      auto end = decode(buf_ptr, p);
-      if (!end) return;
-      p += end - buf_ptr;
-      buf_ptr = end;
-    } while (buf_ptr - buf < num_chars_left);
-  }
-}
-
-template <typename Char>
-inline auto compute_width(basic_string_view<Char> s) -> size_t {
-  return s.size();
-}
-
-// Computes approximate display width of a UTF-8 string.
-FMT_CONSTEXPR inline size_t compute_width(string_view s) {
-  size_t num_code_points = 0;
-  // It is not a lambda for compatibility with C++14.
-  struct count_code_points {
-    size_t* count;
-    FMT_CONSTEXPR auto operator()(uint32_t cp, string_view) const -> bool {
-      *count += detail::to_unsigned(
-          1 +
-          (cp >= 0x1100 &&
-           (cp <= 0x115f ||  // Hangul Jamo init. consonants
-            cp == 0x2329 ||  // LEFT-POINTING ANGLE BRACKET
-            cp == 0x232a ||  // RIGHT-POINTING ANGLE BRACKET
-            // CJK ... Yi except IDEOGRAPHIC HALF FILL SPACE:
-            (cp >= 0x2e80 && cp <= 0xa4cf && cp != 0x303f) ||
-            (cp >= 0xac00 && cp <= 0xd7a3) ||    // Hangul Syllables
-            (cp >= 0xf900 && cp <= 0xfaff) ||    // CJK Compatibility Ideographs
-            (cp >= 0xfe10 && cp <= 0xfe19) ||    // Vertical Forms
-            (cp >= 0xfe30 && cp <= 0xfe6f) ||    // CJK Compatibility Forms
-            (cp >= 0xff00 && cp <= 0xff60) ||    // Fullwidth Forms
-            (cp >= 0xffe0 && cp <= 0xffe6) ||    // Fullwidth Forms
-            (cp >= 0x20000 && cp <= 0x2fffd) ||  // CJK
-            (cp >= 0x30000 && cp <= 0x3fffd) ||
-            // Miscellaneous Symbols and Pictographs + Emoticons:
-            (cp >= 0x1f300 && cp <= 0x1f64f) ||
-            // Supplemental Symbols and Pictographs:
-            (cp >= 0x1f900 && cp <= 0x1f9ff))));
-      return true;
-    }
-  };
-  for_each_codepoint(s, count_code_points{&num_code_points});
-  return num_code_points;
-}
-
-inline auto compute_width(basic_string_view<char8_type> s) -> size_t {
-  return compute_width(basic_string_view<char>(
-      reinterpret_cast<const char*>(s.data()), s.size()));
-}
-
-template <typename Char>
-inline auto code_point_index(basic_string_view<Char> s, size_t n) -> size_t {
-  size_t size = s.size();
-  return n < size ? n : size;
-}
-
-// Calculates the index of the nth code point in a UTF-8 string.
-inline auto code_point_index(basic_string_view<char8_type> s, size_t n)
-    -> size_t {
-  const char8_type* data = s.data();
-  size_t num_code_points = 0;
-  for (size_t i = 0, size = s.size(); i != size; ++i) {
-    if ((data[i] & 0xc0) != 0x80 && ++num_code_points > n) return i;
-  }
-  return s.size();
-}
-
-template <typename T, bool = std::is_floating_point<T>::value>
-struct is_fast_float : bool_constant<std::numeric_limits<T>::is_iec559 &&
-                                     sizeof(T) <= sizeof(double)> {};
-template <typename T> struct is_fast_float<T, false> : std::false_type {};
-
-#ifndef FMT_USE_FULL_CACHE_DRAGONBOX
-#  define FMT_USE_FULL_CACHE_DRAGONBOX 0
-#endif
-
-template <typename T>
-template <typename U>
-void buffer<T>::append(const U* begin, const U* end) {
-  while (begin != end) {
-    auto count = to_unsigned(end - begin);
-    try_reserve(size_ + count);
-    auto free_cap = capacity_ - size_;
-    if (free_cap < count) count = free_cap;
-    std::uninitialized_copy_n(begin, count, make_checked(ptr_ + size_, count));
-    size_ += count;
-    begin += count;
-  }
-}
-
-template <typename T, typename Enable = void>
-struct is_locale : std::false_type {};
-template <typename T>
-struct is_locale<T, void_t<decltype(T::classic())>> : std::true_type {};
-}  // namespace detail
-
-FMT_MODULE_EXPORT_BEGIN
-
-// The number of characters to store in the basic_memory_buffer object itself
-// to avoid dynamic memory allocation.
-enum { inline_buffer_size = 500 };
-
-/**
-  \rst
-  A dynamically growing memory buffer for trivially copyable/constructible types
-  with the first ``SIZE`` elements stored in the object itself.
-
-  You can use the ``memory_buffer`` type alias for ``char`` instead.
-
-  **Example**::
-
-     auto out = fmt::memory_buffer();
-     format_to(std::back_inserter(out), "The answer is {}.", 42);
-
-  This will append the following output to the ``out`` object:
-
-  .. code-block:: none
-
-     The answer is 42.
-
-  The output can be converted to an ``std::string`` with ``to_string(out)``.
-  \endrst
- */
-template <typename T, size_t SIZE = inline_buffer_size,
-          typename Allocator = std::allocator<T>>
-class basic_memory_buffer final : public detail::buffer<T> {
- private:
-  T store_[SIZE];
-
-  // Don't inherit from Allocator avoid generating type_info for it.
-  Allocator alloc_;
-
-  // Deallocate memory allocated by the buffer.
-  FMT_CONSTEXPR20 void deallocate() {
-    T* data = this->data();
-    if (data != store_) alloc_.deallocate(data, this->capacity());
-  }
-
- protected:
-  FMT_CONSTEXPR20 void grow(size_t size) override;
-
- public:
-  using value_type = T;
-  using const_reference = const T&;
-
-  FMT_CONSTEXPR20 explicit basic_memory_buffer(
-      const Allocator& alloc = Allocator())
-      : alloc_(alloc) {
-    this->set(store_, SIZE);
-    if (detail::is_constant_evaluated()) {
-      detail::fill_n(store_, SIZE, T{});
-    }
-  }
-  FMT_CONSTEXPR20 ~basic_memory_buffer() { deallocate(); }
-
- private:
-  // Move data from other to this buffer.
-  FMT_CONSTEXPR20 void move(basic_memory_buffer& other) {
-    alloc_ = std::move(other.alloc_);
-    T* data = other.data();
-    size_t size = other.size(), capacity = other.capacity();
-    if (data == other.store_) {
-      this->set(store_, capacity);
-      if (detail::is_constant_evaluated()) {
-        detail::copy_str<T>(other.store_, other.store_ + size,
-                            detail::make_checked(store_, capacity));
-      } else {
-        std::uninitialized_copy(other.store_, other.store_ + size,
-                                detail::make_checked(store_, capacity));
-      }
-    } else {
-      this->set(data, capacity);
-      // Set pointer to the inline array so that delete is not called
-      // when deallocating.
-      other.set(other.store_, 0);
-    }
-    this->resize(size);
-  }
-
- public:
-  /**
-    \rst
-    Constructs a :class:`fmt::basic_memory_buffer` object moving the content
-    of the other object to it.
-    \endrst
-   */
-  FMT_CONSTEXPR20 basic_memory_buffer(basic_memory_buffer&& other)
-      FMT_NOEXCEPT {
-    move(other);
-  }
-
-  /**
-    \rst
-    Moves the content of the other ``basic_memory_buffer`` object to this one.
-    \endrst
-   */
-  auto operator=(basic_memory_buffer&& other) FMT_NOEXCEPT
-      -> basic_memory_buffer& {
-    FMT_ASSERT(this != &other, "");
-    deallocate();
-    move(other);
-    return *this;
-  }
-
-  // Returns a copy of the allocator associated with this buffer.
-  auto get_allocator() const -> Allocator { return alloc_; }
-
-  /**
-    Resizes the buffer to contain *count* elements. If T is a POD type new
-    elements may not be initialized.
-   */
-  FMT_CONSTEXPR20 void resize(size_t count) { this->try_resize(count); }
-
-  /** Increases the buffer capacity to *new_capacity*. */
-  void reserve(size_t new_capacity) { this->try_reserve(new_capacity); }
-
-  // Directly append data into the buffer
-  using detail::buffer<T>::append;
-  template <typename ContiguousRange>
-  void append(const ContiguousRange& range) {
-    append(range.data(), range.data() + range.size());
-  }
-};
-
-template <typename T, size_t SIZE, typename Allocator>
-FMT_CONSTEXPR20 void basic_memory_buffer<T, SIZE, Allocator>::grow(
-    size_t size) {
-#ifdef FMT_FUZZ
-  if (size > 5000) throw std::runtime_error("fuzz mode - won't grow that much");
-#endif
-  const size_t max_size = std::allocator_traits<Allocator>::max_size(alloc_);
-  size_t old_capacity = this->capacity();
-  size_t new_capacity = old_capacity + old_capacity / 2;
-  if (size > new_capacity)
-    new_capacity = size;
-  else if (new_capacity > max_size)
-    new_capacity = size > max_size ? size : max_size;
-  T* old_data = this->data();
-  T* new_data =
-      std::allocator_traits<Allocator>::allocate(alloc_, new_capacity);
-  // The following code doesn't throw, so the raw pointer above doesn't leak.
-  std::uninitialized_copy(old_data, old_data + this->size(),
-                          detail::make_checked(new_data, new_capacity));
-  this->set(new_data, new_capacity);
-  // deallocate must not throw according to the standard, but even if it does,
-  // the buffer already uses the new storage and will deallocate it in
-  // destructor.
-  if (old_data != store_) alloc_.deallocate(old_data, old_capacity);
-}
-
-using memory_buffer = basic_memory_buffer<char>;
-
-template <typename T, size_t SIZE, typename Allocator>
-struct is_contiguous<basic_memory_buffer<T, SIZE, Allocator>> : std::true_type {
-};
-
-namespace detail {
-FMT_API void print(std::FILE*, string_view);
-}
-
-/** A formatting error such as invalid format string. */
-FMT_CLASS_API
-class FMT_API format_error : public std::runtime_error {
- public:
-  explicit format_error(const char* message) : std::runtime_error(message) {}
-  explicit format_error(const std::string& message)
-      : std::runtime_error(message) {}
-  format_error(const format_error&) = default;
-  format_error& operator=(const format_error&) = default;
-  format_error(format_error&&) = default;
-  format_error& operator=(format_error&&) = default;
-  ~format_error() FMT_NOEXCEPT override FMT_MSC_DEFAULT;
-};
-
-/**
-  \rst
-  Constructs a `~fmt::format_arg_store` object that contains references
-  to arguments and can be implicitly converted to `~fmt::format_args`.
-  If ``fmt`` is a compile-time string then `make_args_checked` checks
-  its validity at compile time.
-  \endrst
- */
-template <typename... Args, typename S, typename Char = char_t<S>>
-FMT_INLINE auto make_args_checked(const S& fmt,
-                                  const remove_reference_t<Args>&... args)
-    -> format_arg_store<buffer_context<Char>, remove_reference_t<Args>...> {
-  static_assert(
-      detail::count<(
-              std::is_base_of<detail::view, remove_reference_t<Args>>::value &&
-              std::is_reference<Args>::value)...>() == 0,
-      "passing views as lvalues is disallowed");
-  detail::check_format_string<Args...>(fmt);
-  return {args...};
-}
-
-// compile-time support
-namespace detail_exported {
-#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-template <typename Char, size_t N> struct fixed_string {
-  constexpr fixed_string(const Char (&str)[N]) {
-    detail::copy_str<Char, const Char*, Char*>(static_cast<const Char*>(str),
-                                               str + N, data);
-  }
-  Char data[N]{};
-};
-#endif
-
-// Converts a compile-time string to basic_string_view.
-template <typename Char, size_t N>
-constexpr auto compile_string_to_view(const Char (&s)[N])
-    -> basic_string_view<Char> {
-  // Remove trailing NUL character if needed. Won't be present if this is used
-  // with a raw character array (i.e. not defined as a string).
-  return {s, N - (std::char_traits<Char>::to_int_type(s[N - 1]) == 0 ? 1 : 0)};
-}
-template <typename Char>
-constexpr auto compile_string_to_view(detail::std_string_view<Char> s)
-    -> basic_string_view<Char> {
-  return {s.data(), s.size()};
-}
-}  // namespace detail_exported
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
-template <typename T> struct is_integral : std::is_integral<T> {};
-template <> struct is_integral<int128_t> : std::true_type {};
-template <> struct is_integral<uint128_t> : std::true_type {};
-
-template <typename T>
-using is_signed =
-    std::integral_constant<bool, std::numeric_limits<T>::is_signed ||
-                                     std::is_same<T, int128_t>::value>;
-
-// Returns true if value is negative, false otherwise.
-// Same as `value < 0` but doesn't produce warnings if T is an unsigned type.
-template <typename T, FMT_ENABLE_IF(is_signed<T>::value)>
-FMT_CONSTEXPR auto is_negative(T value) -> bool {
-  return value < 0;
-}
-template <typename T, FMT_ENABLE_IF(!is_signed<T>::value)>
-FMT_CONSTEXPR auto is_negative(T) -> bool {
-  return false;
-}
-
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-FMT_CONSTEXPR auto is_supported_floating_point(T) -> uint16_t {
-  return (std::is_same<T, float>::value && FMT_USE_FLOAT) ||
-         (std::is_same<T, double>::value && FMT_USE_DOUBLE) ||
-         (std::is_same<T, long double>::value && FMT_USE_LONG_DOUBLE);
-}
-
-// Smallest of uint32_t, uint64_t, uint128_t that is large enough to
-// represent all values of an integral type T.
-template <typename T>
-using uint32_or_64_or_128_t =
-    conditional_t<num_bits<T>() <= 32 && !FMT_REDUCE_INT_INSTANTIATIONS,
-                  uint32_t,
-                  conditional_t<num_bits<T>() <= 64, uint64_t, uint128_t>>;
-template <typename T>
-using uint64_or_128_t = conditional_t<num_bits<T>() <= 64, uint64_t, uint128_t>;
-
-#define FMT_POWERS_OF_10(factor)                                             \
-  factor * 10, (factor)*100, (factor)*1000, (factor)*10000, (factor)*100000, \
-      (factor)*1000000, (factor)*10000000, (factor)*100000000,               \
-      (factor)*1000000000
-
-// Converts value in the range [0, 100) to a string.
-constexpr const char* digits2(size_t value) {
-  // GCC generates slightly better code when value is pointer-size.
-  return &"0001020304050607080910111213141516171819"
-         "2021222324252627282930313233343536373839"
-         "4041424344454647484950515253545556575859"
-         "6061626364656667686970717273747576777879"
-         "8081828384858687888990919293949596979899"[value * 2];
-}
-
-// Sign is a template parameter to workaround a bug in gcc 4.8.
-template <typename Char, typename Sign> constexpr Char sign(Sign s) {
-#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 604
-  static_assert(std::is_same<Sign, sign_t>::value, "");
-#endif
-  return static_cast<Char>("\0-+ "[s]);
-}
-
-template <typename T> FMT_CONSTEXPR auto count_digits_fallback(T n) -> int {
-  int count = 1;
-  for (;;) {
-    // Integer division is slow so do it for a group of four digits instead
-    // of for every digit. The idea comes from the talk by Alexandrescu
-    // "Three Optimization Tips for C++". See speed-test for a comparison.
-    if (n < 10) return count;
-    if (n < 100) return count + 1;
-    if (n < 1000) return count + 2;
-    if (n < 10000) return count + 3;
-    n /= 10000u;
-    count += 4;
-  }
-}
-#if FMT_USE_INT128
-FMT_CONSTEXPR inline auto count_digits(uint128_t n) -> int {
-  return count_digits_fallback(n);
-}
-#endif
-
-#ifdef FMT_BUILTIN_CLZLL
-// It is a separate function rather than a part of count_digits to workaround
-// the lack of static constexpr in constexpr functions.
-inline auto do_count_digits(uint64_t n) -> int {
-  // This has comparable performance to the version by Kendall Willets
-  // (https://github.com/fmtlib/format-benchmark/blob/master/digits10)
-  // but uses smaller tables.
-  // Maps bsr(n) to ceil(log10(pow(2, bsr(n) + 1) - 1)).
-  static constexpr uint8_t bsr2log10[] = {
-      1,  1,  1,  2,  2,  2,  3,  3,  3,  4,  4,  4,  4,  5,  5,  5,
-      6,  6,  6,  7,  7,  7,  7,  8,  8,  8,  9,  9,  9,  10, 10, 10,
-      10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 15, 15,
-      15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20};
-  auto t = bsr2log10[FMT_BUILTIN_CLZLL(n | 1) ^ 63];
-  static constexpr const uint64_t zero_or_powers_of_10[] = {
-      0, 0, FMT_POWERS_OF_10(1U), FMT_POWERS_OF_10(1000000000ULL),
-      10000000000000000000ULL};
-  return t - (n < zero_or_powers_of_10[t]);
-}
-#endif
-
-// Returns the number of decimal digits in n. Leading zeros are not counted
-// except for n == 0 in which case count_digits returns 1.
-FMT_CONSTEXPR20 inline auto count_digits(uint64_t n) -> int {
-#ifdef FMT_BUILTIN_CLZLL
-  if (!is_constant_evaluated()) {
-    return do_count_digits(n);
-  }
-#endif
-  return count_digits_fallback(n);
-}
-
-// Counts the number of digits in n. BITS = log2(radix).
-template <int BITS, typename UInt>
-FMT_CONSTEXPR auto count_digits(UInt n) -> int {
-#ifdef FMT_BUILTIN_CLZ
-  if (num_bits<UInt>() == 32)
-    return (FMT_BUILTIN_CLZ(static_cast<uint32_t>(n) | 1) ^ 31) / BITS + 1;
-#endif
-  // Lambda avoids unreachable code warnings from NVHPC.
-  return [](UInt m) {
-    int num_digits = 0;
-    do {
-      ++num_digits;
-    } while ((m >>= BITS) != 0);
-    return num_digits;
-  }(n);
-}
-
-template <> auto count_digits<4>(detail::fallback_uintptr n) -> int;
-
-#ifdef FMT_BUILTIN_CLZ
-// It is a separate function rather than a part of count_digits to workaround
-// the lack of static constexpr in constexpr functions.
-FMT_INLINE auto do_count_digits(uint32_t n) -> int {
-// An optimization by Kendall Willets from https://bit.ly/3uOIQrB.
-// This increments the upper 32 bits (log10(T) - 1) when >= T is added.
-#  define FMT_INC(T) (((sizeof(#  T) - 1ull) << 32) - T)
-  static constexpr uint64_t table[] = {
-      FMT_INC(0),          FMT_INC(0),          FMT_INC(0),           // 8
-      FMT_INC(10),         FMT_INC(10),         FMT_INC(10),          // 64
-      FMT_INC(100),        FMT_INC(100),        FMT_INC(100),         // 512
-      FMT_INC(1000),       FMT_INC(1000),       FMT_INC(1000),        // 4096
-      FMT_INC(10000),      FMT_INC(10000),      FMT_INC(10000),       // 32k
-      FMT_INC(100000),     FMT_INC(100000),     FMT_INC(100000),      // 256k
-      FMT_INC(1000000),    FMT_INC(1000000),    FMT_INC(1000000),     // 2048k
-      FMT_INC(10000000),   FMT_INC(10000000),   FMT_INC(10000000),    // 16M
-      FMT_INC(100000000),  FMT_INC(100000000),  FMT_INC(100000000),   // 128M
-      FMT_INC(1000000000), FMT_INC(1000000000), FMT_INC(1000000000),  // 1024M
-      FMT_INC(1000000000), FMT_INC(1000000000)                        // 4B
-  };
-  auto inc = table[FMT_BUILTIN_CLZ(n | 1) ^ 31];
-  return static_cast<int>((n + inc) >> 32);
-}
-#endif
-
-// Optional version of count_digits for better performance on 32-bit platforms.
-FMT_CONSTEXPR20 inline auto count_digits(uint32_t n) -> int {
-#ifdef FMT_BUILTIN_CLZ
-  if (!is_constant_evaluated()) {
-    return do_count_digits(n);
-  }
-#endif
-  return count_digits_fallback(n);
-}
-
-template <typename Int> constexpr auto digits10() FMT_NOEXCEPT -> int {
-  return std::numeric_limits<Int>::digits10;
-}
-template <> constexpr auto digits10<int128_t>() FMT_NOEXCEPT -> int {
-  return 38;
-}
-template <> constexpr auto digits10<uint128_t>() FMT_NOEXCEPT -> int {
-  return 38;
-}
-
-template <typename Char> struct thousands_sep_result {
-  std::string grouping;
-  Char thousands_sep;
-};
-
-template <typename Char>
-FMT_API auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result<Char>;
-template <typename Char>
-inline auto thousands_sep(locale_ref loc) -> thousands_sep_result<Char> {
-  auto result = thousands_sep_impl<char>(loc);
-  return {result.grouping, Char(result.thousands_sep)};
-}
-template <>
-inline auto thousands_sep(locale_ref loc) -> thousands_sep_result<wchar_t> {
-  return thousands_sep_impl<wchar_t>(loc);
-}
-
-template <typename Char>
-FMT_API auto decimal_point_impl(locale_ref loc) -> Char;
-template <typename Char> inline auto decimal_point(locale_ref loc) -> Char {
-  return Char(decimal_point_impl<char>(loc));
-}
-template <> inline auto decimal_point(locale_ref loc) -> wchar_t {
-  return decimal_point_impl<wchar_t>(loc);
-}
-
-// Compares two characters for equality.
-template <typename Char> auto equal2(const Char* lhs, const char* rhs) -> bool {
-  return lhs[0] == Char(rhs[0]) && lhs[1] == Char(rhs[1]);
-}
-inline auto equal2(const char* lhs, const char* rhs) -> bool {
-  return memcmp(lhs, rhs, 2) == 0;
-}
-
-// Copies two characters from src to dst.
-template <typename Char>
-FMT_CONSTEXPR20 FMT_INLINE void copy2(Char* dst, const char* src) {
-  if (!is_constant_evaluated() && sizeof(Char) == sizeof(char)) {
-    memcpy(dst, src, 2);
-    return;
-  }
-  *dst++ = static_cast<Char>(*src++);
-  *dst = static_cast<Char>(*src);
-}
-
-template <typename Iterator> struct format_decimal_result {
-  Iterator begin;
-  Iterator end;
-};
-
-// Formats a decimal unsigned integer value writing into out pointing to a
-// buffer of specified size. The caller must ensure that the buffer is large
-// enough.
-template <typename Char, typename UInt>
-FMT_CONSTEXPR20 auto format_decimal(Char* out, UInt value, int size)
-    -> format_decimal_result<Char*> {
-  FMT_ASSERT(size >= count_digits(value), "invalid digit count");
-  out += size;
-  Char* end = out;
-  while (value >= 100) {
-    // Integer division is slow so do it for a group of two digits instead
-    // of for every digit. The idea comes from the talk by Alexandrescu
-    // "Three Optimization Tips for C++". See speed-test for a comparison.
-    out -= 2;
-    copy2(out, digits2(static_cast<size_t>(value % 100)));
-    value /= 100;
-  }
-  if (value < 10) {
-    *--out = static_cast<Char>('0' + value);
-    return {out, end};
-  }
-  out -= 2;
-  copy2(out, digits2(static_cast<size_t>(value)));
-  return {out, end};
-}
-
-template <typename Char, typename UInt, typename Iterator,
-          FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<Iterator>>::value)>
-inline auto format_decimal(Iterator out, UInt value, int size)
-    -> format_decimal_result<Iterator> {
-  // Buffer is large enough to hold all digits (digits10 + 1).
-  Char buffer[digits10<UInt>() + 1];
-  auto end = format_decimal(buffer, value, size).end;
-  return {out, detail::copy_str_noinline<Char>(buffer, end, out)};
-}
-
-template <unsigned BASE_BITS, typename Char, typename UInt>
-FMT_CONSTEXPR auto format_uint(Char* buffer, UInt value, int num_digits,
-                               bool upper = false) -> Char* {
-  buffer += num_digits;
-  Char* end = buffer;
-  do {
-    const char* digits = upper ? "0123456789ABCDEF" : "0123456789abcdef";
-    unsigned digit = (value & ((1 << BASE_BITS) - 1));
-    *--buffer = static_cast<Char>(BASE_BITS < 4 ? static_cast<char>('0' + digit)
-                                                : digits[digit]);
-  } while ((value >>= BASE_BITS) != 0);
-  return end;
-}
-
-template <unsigned BASE_BITS, typename Char>
-auto format_uint(Char* buffer, detail::fallback_uintptr n, int num_digits,
-                 bool = false) -> Char* {
-  auto char_digits = std::numeric_limits<unsigned char>::digits / 4;
-  int start = (num_digits + char_digits - 1) / char_digits - 1;
-  if (int start_digits = num_digits % char_digits) {
-    unsigned value = n.value[start--];
-    buffer = format_uint<BASE_BITS>(buffer, value, start_digits);
-  }
-  for (; start >= 0; --start) {
-    unsigned value = n.value[start];
-    buffer += char_digits;
-    auto p = buffer;
-    for (int i = 0; i < char_digits; ++i) {
-      unsigned digit = (value & ((1 << BASE_BITS) - 1));
-      *--p = static_cast<Char>("0123456789abcdef"[digit]);
-      value >>= BASE_BITS;
-    }
-  }
-  return buffer;
-}
-
-template <unsigned BASE_BITS, typename Char, typename It, typename UInt>
-inline auto format_uint(It out, UInt value, int num_digits, bool upper = false)
-    -> It {
-  if (auto ptr = to_pointer<Char>(out, to_unsigned(num_digits))) {
-    format_uint<BASE_BITS>(ptr, value, num_digits, upper);
-    return out;
-  }
-  // Buffer should be large enough to hold all digits (digits / BASE_BITS + 1).
-  char buffer[num_bits<UInt>() / BASE_BITS + 1];
-  format_uint<BASE_BITS>(buffer, value, num_digits, upper);
-  return detail::copy_str_noinline<Char>(buffer, buffer + num_digits, out);
-}
-
-// A converter from UTF-8 to UTF-16.
-class utf8_to_utf16 {
- private:
-  basic_memory_buffer<wchar_t> buffer_;
-
- public:
-  FMT_API explicit utf8_to_utf16(string_view s);
-  operator basic_string_view<wchar_t>() const { return {&buffer_[0], size()}; }
-  auto size() const -> size_t { return buffer_.size() - 1; }
-  auto c_str() const -> const wchar_t* { return &buffer_[0]; }
-  auto str() const -> std::wstring { return {&buffer_[0], size()}; }
-};
-
-namespace dragonbox {
-
-// Type-specific information that Dragonbox uses.
-template <class T> struct float_info;
-
-template <> struct float_info<float> {
-  using carrier_uint = uint32_t;
-  static const int significand_bits = 23;
-  static const int exponent_bits = 8;
-  static const int min_exponent = -126;
-  static const int max_exponent = 127;
-  static const int exponent_bias = -127;
-  static const int decimal_digits = 9;
-  static const int kappa = 1;
-  static const int big_divisor = 100;
-  static const int small_divisor = 10;
-  static const int min_k = -31;
-  static const int max_k = 46;
-  static const int cache_bits = 64;
-  static const int divisibility_check_by_5_threshold = 39;
-  static const int case_fc_pm_half_lower_threshold = -1;
-  static const int case_fc_pm_half_upper_threshold = 6;
-  static const int case_fc_lower_threshold = -2;
-  static const int case_fc_upper_threshold = 6;
-  static const int case_shorter_interval_left_endpoint_lower_threshold = 2;
-  static const int case_shorter_interval_left_endpoint_upper_threshold = 3;
-  static const int shorter_interval_tie_lower_threshold = -35;
-  static const int shorter_interval_tie_upper_threshold = -35;
-  static const int max_trailing_zeros = 7;
-};
-
-template <> struct float_info<double> {
-  using carrier_uint = uint64_t;
-  static const int significand_bits = 52;
-  static const int exponent_bits = 11;
-  static const int min_exponent = -1022;
-  static const int max_exponent = 1023;
-  static const int exponent_bias = -1023;
-  static const int decimal_digits = 17;
-  static const int kappa = 2;
-  static const int big_divisor = 1000;
-  static const int small_divisor = 100;
-  static const int min_k = -292;
-  static const int max_k = 326;
-  static const int cache_bits = 128;
-  static const int divisibility_check_by_5_threshold = 86;
-  static const int case_fc_pm_half_lower_threshold = -2;
-  static const int case_fc_pm_half_upper_threshold = 9;
-  static const int case_fc_lower_threshold = -4;
-  static const int case_fc_upper_threshold = 9;
-  static const int case_shorter_interval_left_endpoint_lower_threshold = 2;
-  static const int case_shorter_interval_left_endpoint_upper_threshold = 3;
-  static const int shorter_interval_tie_lower_threshold = -77;
-  static const int shorter_interval_tie_upper_threshold = -77;
-  static const int max_trailing_zeros = 16;
-};
-
-template <typename T> struct decimal_fp {
-  using significand_type = typename float_info<T>::carrier_uint;
-  significand_type significand;
-  int exponent;
-};
-
-template <typename T>
-FMT_API auto to_decimal(T x) FMT_NOEXCEPT -> decimal_fp<T>;
-}  // namespace dragonbox
-
-template <typename T>
-constexpr auto exponent_mask() ->
-    typename dragonbox::float_info<T>::carrier_uint {
-  using uint = typename dragonbox::float_info<T>::carrier_uint;
-  return ((uint(1) << dragonbox::float_info<T>::exponent_bits) - 1)
-         << dragonbox::float_info<T>::significand_bits;
-}
-
-// Writes the exponent exp in the form "[+-]d{2,3}" to buffer.
-template <typename Char, typename It>
-FMT_CONSTEXPR auto write_exponent(int exp, It it) -> It {
-  FMT_ASSERT(-10000 < exp && exp < 10000, "exponent out of range");
-  if (exp < 0) {
-    *it++ = static_cast<Char>('-');
-    exp = -exp;
-  } else {
-    *it++ = static_cast<Char>('+');
-  }
-  if (exp >= 100) {
-    const char* top = digits2(to_unsigned(exp / 100));
-    if (exp >= 1000) *it++ = static_cast<Char>(top[0]);
-    *it++ = static_cast<Char>(top[1]);
-    exp %= 100;
-  }
-  const char* d = digits2(to_unsigned(exp));
-  *it++ = static_cast<Char>(d[0]);
-  *it++ = static_cast<Char>(d[1]);
-  return it;
-}
-
-template <typename T>
-FMT_HEADER_ONLY_CONSTEXPR20 auto format_float(T value, int precision,
-                                              float_specs specs,
-                                              buffer<char>& buf) -> int;
-
-// Formats a floating-point number with snprintf.
-template <typename T>
-auto snprintf_float(T value, int precision, float_specs specs,
-                    buffer<char>& buf) -> int;
-
-template <typename T> constexpr auto promote_float(T value) -> T {
-  return value;
-}
-constexpr auto promote_float(float value) -> double {
-  return static_cast<double>(value);
-}
-
-template <typename OutputIt, typename Char>
-FMT_NOINLINE FMT_CONSTEXPR auto fill(OutputIt it, size_t n,
-                                     const fill_t<Char>& fill) -> OutputIt {
-  auto fill_size = fill.size();
-  if (fill_size == 1) return detail::fill_n(it, n, fill[0]);
-  auto data = fill.data();
-  for (size_t i = 0; i < n; ++i)
-    it = copy_str<Char>(data, data + fill_size, it);
-  return it;
-}
-
-// Writes the output of f, padded according to format specifications in specs.
-// size: output size in code units.
-// width: output display width in (terminal) column positions.
-template <align::type align = align::left, typename OutputIt, typename Char,
-          typename F>
-FMT_CONSTEXPR auto write_padded(OutputIt out,
-                                const basic_format_specs<Char>& specs,
-                                size_t size, size_t width, F&& f) -> OutputIt {
-  static_assert(align == align::left || align == align::right, "");
-  unsigned spec_width = to_unsigned(specs.width);
-  size_t padding = spec_width > width ? spec_width - width : 0;
-  // Shifts are encoded as string literals because static constexpr is not
-  // supported in constexpr functions.
-  auto* shifts = align == align::left ? "\x1f\x1f\x00\x01" : "\x00\x1f\x00\x01";
-  size_t left_padding = padding >> shifts[specs.align];
-  size_t right_padding = padding - left_padding;
-  auto it = reserve(out, size + padding * specs.fill.size());
-  if (left_padding != 0) it = fill(it, left_padding, specs.fill);
-  it = f(it);
-  if (right_padding != 0) it = fill(it, right_padding, specs.fill);
-  return base_iterator(out, it);
-}
-
-template <align::type align = align::left, typename OutputIt, typename Char,
-          typename F>
-constexpr auto write_padded(OutputIt out, const basic_format_specs<Char>& specs,
-                            size_t size, F&& f) -> OutputIt {
-  return write_padded<align>(out, specs, size, size, f);
-}
-
-template <align::type align = align::left, typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write_bytes(OutputIt out, string_view bytes,
-                               const basic_format_specs<Char>& specs)
-    -> OutputIt {
-  return write_padded<align>(
-      out, specs, bytes.size(), [bytes](reserve_iterator<OutputIt> it) {
-        const char* data = bytes.data();
-        return copy_str<Char>(data, data + bytes.size(), it);
-      });
-}
-
-template <typename Char, typename OutputIt, typename UIntPtr>
-auto write_ptr(OutputIt out, UIntPtr value,
-               const basic_format_specs<Char>* specs) -> OutputIt {
-  int num_digits = count_digits<4>(value);
-  auto size = to_unsigned(num_digits) + size_t(2);
-  auto write = [=](reserve_iterator<OutputIt> it) {
-    *it++ = static_cast<Char>('0');
-    *it++ = static_cast<Char>('x');
-    return format_uint<4, Char>(it, value, num_digits);
-  };
-  return specs ? write_padded<align::right>(out, *specs, size, write)
-               : base_iterator(out, write(reserve(out, size)));
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write_char(OutputIt out, Char value,
-                              const basic_format_specs<Char>& specs)
-    -> OutputIt {
-  return write_padded(out, specs, 1, [=](reserve_iterator<OutputIt> it) {
-    *it++ = value;
-    return it;
-  });
-}
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, Char value,
-                         const basic_format_specs<Char>& specs,
-                         locale_ref loc = {}) -> OutputIt {
-  return check_char_specs(specs)
-             ? write_char(out, value, specs)
-             : write(out, static_cast<int>(value), specs, loc);
-}
-
-// Data for write_int that doesn't depend on output iterator type. It is used to
-// avoid template code bloat.
-template <typename Char> struct write_int_data {
-  size_t size;
-  size_t padding;
-
-  FMT_CONSTEXPR write_int_data(int num_digits, unsigned prefix,
-                               const basic_format_specs<Char>& specs)
-      : size((prefix >> 24) + to_unsigned(num_digits)), padding(0) {
-    if (specs.align == align::numeric) {
-      auto width = to_unsigned(specs.width);
-      if (width > size) {
-        padding = width - size;
-        size = width;
-      }
-    } else if (specs.precision > num_digits) {
-      size = (prefix >> 24) + to_unsigned(specs.precision);
-      padding = to_unsigned(specs.precision - num_digits);
-    }
-  }
-};
-
-// Writes an integer in the format
-//   <left-padding><prefix><numeric-padding><digits><right-padding>
-// where <digits> are written by write_digits(it).
-// prefix contains chars in three lower bytes and the size in the fourth byte.
-template <typename OutputIt, typename Char, typename W>
-FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, int num_digits,
-                                        unsigned prefix,
-                                        const basic_format_specs<Char>& specs,
-                                        W write_digits) -> OutputIt {
-  // Slightly faster check for specs.width == 0 && specs.precision == -1.
-  if ((specs.width | (specs.precision + 1)) == 0) {
-    auto it = reserve(out, to_unsigned(num_digits) + (prefix >> 24));
-    if (prefix != 0) {
-      for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
-        *it++ = static_cast<Char>(p & 0xff);
-    }
-    return base_iterator(out, write_digits(it));
-  }
-  auto data = write_int_data<Char>(num_digits, prefix, specs);
-  return write_padded<align::right>(
-      out, specs, data.size, [=](reserve_iterator<OutputIt> it) {
-        for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
-          *it++ = static_cast<Char>(p & 0xff);
-        it = detail::fill_n(it, data.padding, static_cast<Char>('0'));
-        return write_digits(it);
-      });
-}
-
-template <typename Char> class digit_grouping {
- private:
-  thousands_sep_result<Char> sep_;
-
-  struct next_state {
-    std::string::const_iterator group;
-    int pos;
-  };
-  next_state initial_state() const { return {sep_.grouping.begin(), 0}; }
-
-  // Returns the next digit group separator position.
-  int next(next_state& state) const {
-    if (!sep_.thousands_sep) return max_value<int>();
-    if (state.group == sep_.grouping.end())
-      return state.pos += sep_.grouping.back();
-    if (*state.group <= 0 || *state.group == max_value<char>())
-      return max_value<int>();
-    state.pos += *state.group++;
-    return state.pos;
-  }
-
- public:
-  explicit digit_grouping(locale_ref loc, bool localized = true) {
-    if (localized)
-      sep_ = thousands_sep<Char>(loc);
-    else
-      sep_.thousands_sep = Char();
-  }
-  explicit digit_grouping(thousands_sep_result<Char> sep) : sep_(sep) {}
-
-  Char separator() const { return sep_.thousands_sep; }
-
-  int count_separators(int num_digits) const {
-    int count = 0;
-    auto state = initial_state();
-    while (num_digits > next(state)) ++count;
-    return count;
-  }
-
-  // Applies grouping to digits and write the output to out.
-  template <typename Out, typename C>
-  Out apply(Out out, basic_string_view<C> digits) const {
-    auto num_digits = static_cast<int>(digits.size());
-    auto separators = basic_memory_buffer<int>();
-    separators.push_back(0);
-    auto state = initial_state();
-    while (int i = next(state)) {
-      if (i >= num_digits) break;
-      separators.push_back(i);
-    }
-    for (int i = 0, sep_index = static_cast<int>(separators.size() - 1);
-         i < num_digits; ++i) {
-      if (num_digits - i == separators[sep_index]) {
-        *out++ = separator();
-        --sep_index;
-      }
-      *out++ = static_cast<Char>(digits[to_unsigned(i)]);
-    }
-    return out;
-  }
-};
-
-template <typename OutputIt, typename UInt, typename Char>
-auto write_int_localized(OutputIt out, UInt value, unsigned prefix,
-                         const basic_format_specs<Char>& specs,
-                         const digit_grouping<Char>& grouping) -> OutputIt {
-  static_assert(std::is_same<uint64_or_128_t<UInt>, UInt>::value, "");
-  int num_digits = count_digits(value);
-  char digits[40];
-  format_decimal(digits, value, num_digits);
-  unsigned size = to_unsigned((prefix != 0 ? 1 : 0) + num_digits +
-                              grouping.count_separators(num_digits));
-  return write_padded<align::right>(
-      out, specs, size, size, [&](reserve_iterator<OutputIt> it) {
-        if (prefix != 0) *it++ = static_cast<Char>(prefix);
-        return grouping.apply(it, string_view(digits, to_unsigned(num_digits)));
-      });
-}
-
-template <typename OutputIt, typename UInt, typename Char>
-auto write_int_localized(OutputIt& out, UInt value, unsigned prefix,
-                         const basic_format_specs<Char>& specs, locale_ref loc)
-    -> bool {
-  auto grouping = digit_grouping<Char>(loc);
-  out = write_int_localized(out, value, prefix, specs, grouping);
-  return true;
-}
-
-FMT_CONSTEXPR inline void prefix_append(unsigned& prefix, unsigned value) {
-  prefix |= prefix != 0 ? value << 8 : value;
-  prefix += (1u + (value > 0xff ? 1 : 0)) << 24;
-}
-
-template <typename UInt> struct write_int_arg {
-  UInt abs_value;
-  unsigned prefix;
-};
-
-template <typename T>
-FMT_CONSTEXPR auto make_write_int_arg(T value, sign_t sign)
-    -> write_int_arg<uint32_or_64_or_128_t<T>> {
-  auto prefix = 0u;
-  auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
-  if (is_negative(value)) {
-    prefix = 0x01000000 | '-';
-    abs_value = 0 - abs_value;
-  } else {
-    constexpr const unsigned prefixes[4] = {0, 0, 0x1000000u | '+',
-                                            0x1000000u | ' '};
-    prefix = prefixes[sign];
-  }
-  return {abs_value, prefix};
-}
-
-template <typename Char, typename OutputIt, typename T>
-FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg<T> arg,
-                                        const basic_format_specs<Char>& specs,
-                                        locale_ref loc) -> OutputIt {
-  static_assert(std::is_same<T, uint32_or_64_or_128_t<T>>::value, "");
-  auto abs_value = arg.abs_value;
-  auto prefix = arg.prefix;
-  switch (specs.type) {
-  case presentation_type::none:
-  case presentation_type::dec: {
-    if (specs.localized &&
-        write_int_localized(out, static_cast<uint64_or_128_t<T>>(abs_value),
-                            prefix, specs, loc)) {
-      return out;
-    }
-    auto num_digits = count_digits(abs_value);
-    return write_int(
-        out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
-          return format_decimal<Char>(it, abs_value, num_digits).end;
-        });
-  }
-  case presentation_type::hex_lower:
-  case presentation_type::hex_upper: {
-    bool upper = specs.type == presentation_type::hex_upper;
-    if (specs.alt)
-      prefix_append(prefix, unsigned(upper ? 'X' : 'x') << 8 | '0');
-    int num_digits = count_digits<4>(abs_value);
-    return write_int(
-        out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
-          return format_uint<4, Char>(it, abs_value, num_digits, upper);
-        });
-  }
-  case presentation_type::bin_lower:
-  case presentation_type::bin_upper: {
-    bool upper = specs.type == presentation_type::bin_upper;
-    if (specs.alt)
-      prefix_append(prefix, unsigned(upper ? 'B' : 'b') << 8 | '0');
-    int num_digits = count_digits<1>(abs_value);
-    return write_int(out, num_digits, prefix, specs,
-                     [=](reserve_iterator<OutputIt> it) {
-                       return format_uint<1, Char>(it, abs_value, num_digits);
-                     });
-  }
-  case presentation_type::oct: {
-    int num_digits = count_digits<3>(abs_value);
-    // Octal prefix '0' is counted as a digit, so only add it if precision
-    // is not greater than the number of digits.
-    if (specs.alt && specs.precision <= num_digits && abs_value != 0)
-      prefix_append(prefix, '0');
-    return write_int(out, num_digits, prefix, specs,
-                     [=](reserve_iterator<OutputIt> it) {
-                       return format_uint<3, Char>(it, abs_value, num_digits);
-                     });
-  }
-  case presentation_type::chr:
-    return write_char(out, static_cast<Char>(abs_value), specs);
-  default:
-    throw_format_error("invalid type specifier");
-  }
-  return out;
-}
-template <typename Char, typename OutputIt, typename T>
-FMT_CONSTEXPR FMT_NOINLINE auto write_int_noinline(
-    OutputIt out, write_int_arg<T> arg, const basic_format_specs<Char>& specs,
-    locale_ref loc) -> OutputIt {
-  return write_int(out, arg, specs, loc);
-}
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(is_integral<T>::value &&
-                        !std::is_same<T, bool>::value &&
-                        std::is_same<OutputIt, buffer_appender<Char>>::value)>
-FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
-                                    const basic_format_specs<Char>& specs,
-                                    locale_ref loc) -> OutputIt {
-  return write_int_noinline(out, make_write_int_arg(value, specs.sign), specs,
-                            loc);
-}
-// An inlined version of write used in format string compilation.
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(is_integral<T>::value &&
-                        !std::is_same<T, bool>::value &&
-                        !std::is_same<OutputIt, buffer_appender<Char>>::value)>
-FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
-                                    const basic_format_specs<Char>& specs,
-                                    locale_ref loc) -> OutputIt {
-  return write_int(out, make_write_int_arg(value, specs.sign), specs, loc);
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> s,
-                         const basic_format_specs<Char>& specs) -> OutputIt {
-  auto data = s.data();
-  auto size = s.size();
-  if (specs.precision >= 0 && to_unsigned(specs.precision) < size)
-    size = code_point_index(s, to_unsigned(specs.precision));
-  auto width =
-      specs.width != 0 ? compute_width(basic_string_view<Char>(data, size)) : 0;
-  return write_padded(out, specs, size, width,
-                      [=](reserve_iterator<OutputIt> it) {
-                        return copy_str<Char>(data, data + size, it);
-                      });
-}
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out,
-                         basic_string_view<type_identity_t<Char>> s,
-                         const basic_format_specs<Char>& specs, locale_ref)
-    -> OutputIt {
-  check_string_type_spec(specs.type);
-  return write(out, s, specs);
-}
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, const Char* s,
-                         const basic_format_specs<Char>& specs, locale_ref)
-    -> OutputIt {
-  return check_cstring_type_spec(specs.type)
-             ? write(out, basic_string_view<Char>(s), specs, {})
-             : write_ptr<Char>(out, to_uintptr(s), &specs);
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR20 auto write_nonfinite(OutputIt out, bool isinf,
-                                     basic_format_specs<Char> specs,
-                                     const float_specs& fspecs) -> OutputIt {
-  auto str =
-      isinf ? (fspecs.upper ? "INF" : "inf") : (fspecs.upper ? "NAN" : "nan");
-  constexpr size_t str_size = 3;
-  auto sign = fspecs.sign;
-  auto size = str_size + (sign ? 1 : 0);
-  // Replace '0'-padding with space for non-finite values.
-  const bool is_zero_fill =
-      specs.fill.size() == 1 && *specs.fill.data() == static_cast<Char>('0');
-  if (is_zero_fill) specs.fill[0] = static_cast<Char>(' ');
-  return write_padded(out, specs, size, [=](reserve_iterator<OutputIt> it) {
-    if (sign) *it++ = detail::sign<Char>(sign);
-    return copy_str<Char>(str, str + str_size, it);
-  });
-}
-
-// A decimal floating-point number significand * pow(10, exp).
-struct big_decimal_fp {
-  const char* significand;
-  int significand_size;
-  int exponent;
-};
-
-constexpr auto get_significand_size(const big_decimal_fp& fp) -> int {
-  return fp.significand_size;
-}
-template <typename T>
-inline auto get_significand_size(const dragonbox::decimal_fp<T>& fp) -> int {
-  return count_digits(fp.significand);
-}
-
-template <typename Char, typename OutputIt>
-constexpr auto write_significand(OutputIt out, const char* significand,
-                                 int significand_size) -> OutputIt {
-  return copy_str<Char>(significand, significand + significand_size, out);
-}
-template <typename Char, typename OutputIt, typename UInt>
-inline auto write_significand(OutputIt out, UInt significand,
-                              int significand_size) -> OutputIt {
-  return format_decimal<Char>(out, significand, significand_size).end;
-}
-template <typename Char, typename OutputIt, typename T, typename Grouping>
-FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
-                                       int significand_size, int exponent,
-                                       const Grouping& grouping) -> OutputIt {
-  if (!grouping.separator()) {
-    out = write_significand<Char>(out, significand, significand_size);
-    return detail::fill_n(out, exponent, static_cast<Char>('0'));
-  }
-  auto buffer = memory_buffer();
-  write_significand<char>(appender(buffer), significand, significand_size);
-  detail::fill_n(appender(buffer), exponent, '0');
-  return grouping.apply(out, string_view(buffer.data(), buffer.size()));
-}
-
-template <typename Char, typename UInt,
-          FMT_ENABLE_IF(std::is_integral<UInt>::value)>
-inline auto write_significand(Char* out, UInt significand, int significand_size,
-                              int integral_size, Char decimal_point) -> Char* {
-  if (!decimal_point)
-    return format_decimal(out, significand, significand_size).end;
-  out += significand_size + 1;
-  Char* end = out;
-  int floating_size = significand_size - integral_size;
-  for (int i = floating_size / 2; i > 0; --i) {
-    out -= 2;
-    copy2(out, digits2(significand % 100));
-    significand /= 100;
-  }
-  if (floating_size % 2 != 0) {
-    *--out = static_cast<Char>('0' + significand % 10);
-    significand /= 10;
-  }
-  *--out = decimal_point;
-  format_decimal(out - integral_size, significand, integral_size);
-  return end;
-}
-
-template <typename OutputIt, typename UInt, typename Char,
-          FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<OutputIt>>::value)>
-inline auto write_significand(OutputIt out, UInt significand,
-                              int significand_size, int integral_size,
-                              Char decimal_point) -> OutputIt {
-  // Buffer is large enough to hold digits (digits10 + 1) and a decimal point.
-  Char buffer[digits10<UInt>() + 2];
-  auto end = write_significand(buffer, significand, significand_size,
-                               integral_size, decimal_point);
-  return detail::copy_str_noinline<Char>(buffer, end, out);
-}
-
-template <typename OutputIt, typename Char>
-FMT_CONSTEXPR auto write_significand(OutputIt out, const char* significand,
-                                     int significand_size, int integral_size,
-                                     Char decimal_point) -> OutputIt {
-  out = detail::copy_str_noinline<Char>(significand,
-                                        significand + integral_size, out);
-  if (!decimal_point) return out;
-  *out++ = decimal_point;
-  return detail::copy_str_noinline<Char>(significand + integral_size,
-                                         significand + significand_size, out);
-}
-
-template <typename OutputIt, typename Char, typename T, typename Grouping>
-FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
-                                       int significand_size, int integral_size,
-                                       Char decimal_point,
-                                       const Grouping& grouping) -> OutputIt {
-  if (!grouping.separator()) {
-    return write_significand(out, significand, significand_size, integral_size,
-                             decimal_point);
-  }
-  auto buffer = basic_memory_buffer<Char>();
-  write_significand(buffer_appender<Char>(buffer), significand,
-                    significand_size, integral_size, decimal_point);
-  grouping.apply(
-      out, basic_string_view<Char>(buffer.data(), to_unsigned(integral_size)));
-  return detail::copy_str_noinline<Char>(buffer.data() + integral_size,
-                                         buffer.end(), out);
-}
-
-template <typename OutputIt, typename DecimalFP, typename Char,
-          typename Grouping = digit_grouping<Char>>
-FMT_CONSTEXPR20 auto do_write_float(OutputIt out, const DecimalFP& fp,
-                                    const basic_format_specs<Char>& specs,
-                                    float_specs fspecs, locale_ref loc)
-    -> OutputIt {
-  auto significand = fp.significand;
-  int significand_size = get_significand_size(fp);
-  constexpr Char zero = static_cast<Char>('0');
-  auto sign = fspecs.sign;
-  size_t size = to_unsigned(significand_size) + (sign ? 1 : 0);
-  using iterator = reserve_iterator<OutputIt>;
-
-  Char decimal_point =
-      fspecs.locale ? detail::decimal_point<Char>(loc) : static_cast<Char>('.');
-
-  int output_exp = fp.exponent + significand_size - 1;
-  auto use_exp_format = [=]() {
-    if (fspecs.format == float_format::exp) return true;
-    if (fspecs.format != float_format::general) return false;
-    // Use the fixed notation if the exponent is in [exp_lower, exp_upper),
-    // e.g. 0.0001 instead of 1e-04. Otherwise use the exponent notation.
-    const int exp_lower = -4, exp_upper = 16;
-    return output_exp < exp_lower ||
-           output_exp >= (fspecs.precision > 0 ? fspecs.precision : exp_upper);
-  };
-  if (use_exp_format()) {
-    int num_zeros = 0;
-    if (fspecs.showpoint) {
-      num_zeros = fspecs.precision - significand_size;
-      if (num_zeros < 0) num_zeros = 0;
-      size += to_unsigned(num_zeros);
-    } else if (significand_size == 1) {
-      decimal_point = Char();
-    }
-    auto abs_output_exp = output_exp >= 0 ? output_exp : -output_exp;
-    int exp_digits = 2;
-    if (abs_output_exp >= 100) exp_digits = abs_output_exp >= 1000 ? 4 : 3;
-
-    size += to_unsigned((decimal_point ? 1 : 0) + 2 + exp_digits);
-    char exp_char = fspecs.upper ? 'E' : 'e';
-    auto write = [=](iterator it) {
-      if (sign) *it++ = detail::sign<Char>(sign);
-      // Insert a decimal point after the first digit and add an exponent.
-      it = write_significand(it, significand, significand_size, 1,
-                             decimal_point);
-      if (num_zeros > 0) it = detail::fill_n(it, num_zeros, zero);
-      *it++ = static_cast<Char>(exp_char);
-      return write_exponent<Char>(output_exp, it);
-    };
-    return specs.width > 0 ? write_padded<align::right>(out, specs, size, write)
-                           : base_iterator(out, write(reserve(out, size)));
-  }
-
-  int exp = fp.exponent + significand_size;
-  if (fp.exponent >= 0) {
-    // 1234e5 -> 123400000[.0+]
-    size += to_unsigned(fp.exponent);
-    int num_zeros = fspecs.precision - exp;
-#ifdef FMT_FUZZ
-    if (num_zeros > 5000)
-      throw std::runtime_error("fuzz mode - avoiding excessive cpu use");
-#endif
-    if (fspecs.showpoint) {
-      if (num_zeros <= 0 && fspecs.format != float_format::fixed) num_zeros = 1;
-      if (num_zeros > 0) size += to_unsigned(num_zeros) + 1;
-    }
-    auto grouping = Grouping(loc, fspecs.locale);
-    size += to_unsigned(grouping.count_separators(significand_size));
-    return write_padded<align::right>(out, specs, size, [&](iterator it) {
-      if (sign) *it++ = detail::sign<Char>(sign);
-      it = write_significand<Char>(it, significand, significand_size,
-                                   fp.exponent, grouping);
-      if (!fspecs.showpoint) return it;
-      *it++ = decimal_point;
-      return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
-    });
-  } else if (exp > 0) {
-    // 1234e-2 -> 12.34[0+]
-    int num_zeros = fspecs.showpoint ? fspecs.precision - significand_size : 0;
-    size += 1 + to_unsigned(num_zeros > 0 ? num_zeros : 0);
-    auto grouping = Grouping(loc, fspecs.locale);
-    size += to_unsigned(grouping.count_separators(significand_size));
-    return write_padded<align::right>(out, specs, size, [&](iterator it) {
-      if (sign) *it++ = detail::sign<Char>(sign);
-      it = write_significand(it, significand, significand_size, exp,
-                             decimal_point, grouping);
-      return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
-    });
-  }
-  // 1234e-6 -> 0.001234
-  int num_zeros = -exp;
-  if (significand_size == 0 && fspecs.precision >= 0 &&
-      fspecs.precision < num_zeros) {
-    num_zeros = fspecs.precision;
-  }
-  bool pointy = num_zeros != 0 || significand_size != 0 || fspecs.showpoint;
-  size += 1 + (pointy ? 1 : 0) + to_unsigned(num_zeros);
-  return write_padded<align::right>(out, specs, size, [&](iterator it) {
-    if (sign) *it++ = detail::sign<Char>(sign);
-    *it++ = zero;
-    if (!pointy) return it;
-    *it++ = decimal_point;
-    it = detail::fill_n(it, num_zeros, zero);
-    return write_significand<Char>(it, significand, significand_size);
-  });
-}
-
-template <typename Char> class fallback_digit_grouping {
- public:
-  constexpr fallback_digit_grouping(locale_ref, bool) {}
-
-  constexpr Char separator() const { return Char(); }
-
-  constexpr int count_separators(int) const { return 0; }
-
-  template <typename Out, typename C>
-  constexpr Out apply(Out out, basic_string_view<C>) const {
-    return out;
-  }
-};
-
-template <typename OutputIt, typename DecimalFP, typename Char>
-FMT_CONSTEXPR20 auto write_float(OutputIt out, const DecimalFP& fp,
-                                 const basic_format_specs<Char>& specs,
-                                 float_specs fspecs, locale_ref loc)
-    -> OutputIt {
-  if (is_constant_evaluated()) {
-    return do_write_float<OutputIt, DecimalFP, Char,
-                          fallback_digit_grouping<Char>>(out, fp, specs, fspecs,
-                                                         loc);
-  } else {
-    return do_write_float(out, fp, specs, fspecs, loc);
-  }
-}
-
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-FMT_CONSTEXPR20 bool isinf(T value) {
-  if (is_constant_evaluated()) {
-#if defined(__cpp_if_constexpr)
-    if constexpr (std::numeric_limits<double>::is_iec559) {
-      auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
-      constexpr auto significand_bits =
-          dragonbox::float_info<double>::significand_bits;
-      return (bits & exponent_mask<double>()) &&
-             !(bits & ((uint64_t(1) << significand_bits) - 1));
-    }
-#endif
-  }
-  return std::isinf(value);
-}
-
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-FMT_CONSTEXPR20 bool isfinite(T value) {
-  if (is_constant_evaluated()) {
-#if defined(__cpp_if_constexpr)
-    if constexpr (std::numeric_limits<double>::is_iec559) {
-      auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
-      return (bits & exponent_mask<double>()) != exponent_mask<double>();
-    }
-#endif
-  }
-  return std::isfinite(value);
-}
-
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-FMT_INLINE FMT_CONSTEXPR bool signbit(T value) {
-  if (is_constant_evaluated()) {
-#ifdef __cpp_if_constexpr
-    if constexpr (std::numeric_limits<double>::is_iec559) {
-      auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
-      return (bits & (uint64_t(1) << (num_bits<uint64_t>() - 1))) != 0;
-    }
-#endif
-  }
-  return std::signbit(value);
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-FMT_CONSTEXPR20 auto write(OutputIt out, T value,
-                           basic_format_specs<Char> specs, locale_ref loc = {})
-    -> OutputIt {
-  if (const_check(!is_supported_floating_point(value))) return out;
-  float_specs fspecs = parse_float_type_spec(specs);
-  fspecs.sign = specs.sign;
-  if (detail::signbit(value)) {  // value < 0 is false for NaN so use signbit.
-    fspecs.sign = sign::minus;
-    value = -value;
-  } else if (fspecs.sign == sign::minus) {
-    fspecs.sign = sign::none;
-  }
-
-  if (!detail::isfinite(value))
-    return write_nonfinite(out, detail::isinf(value), specs, fspecs);
-
-  if (specs.align == align::numeric && fspecs.sign) {
-    auto it = reserve(out, 1);
-    *it++ = detail::sign<Char>(fspecs.sign);
-    out = base_iterator(out, it);
-    fspecs.sign = sign::none;
-    if (specs.width != 0) --specs.width;
-  }
-
-  memory_buffer buffer;
-  if (fspecs.format == float_format::hex) {
-    if (fspecs.sign) buffer.push_back(detail::sign<char>(fspecs.sign));
-    snprintf_float(promote_float(value), specs.precision, fspecs, buffer);
-    return write_bytes<align::right>(out, {buffer.data(), buffer.size()},
-                                     specs);
-  }
-  int precision = specs.precision >= 0 || specs.type == presentation_type::none
-                      ? specs.precision
-                      : 6;
-  if (fspecs.format == float_format::exp) {
-    if (precision == max_value<int>())
-      throw_format_error("number is too big");
-    else
-      ++precision;
-  }
-  if (const_check(std::is_same<T, float>())) fspecs.binary32 = true;
-  if (!is_fast_float<T>()) fspecs.fallback = true;
-  int exp = format_float(promote_float(value), precision, fspecs, buffer);
-  fspecs.precision = precision;
-  auto fp = big_decimal_fp{buffer.data(), static_cast<int>(buffer.size()), exp};
-  return write_float(out, fp, specs, fspecs, loc);
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(is_fast_float<T>::value)>
-FMT_CONSTEXPR20 auto write(OutputIt out, T value) -> OutputIt {
-  if (is_constant_evaluated()) {
-    return write(out, value, basic_format_specs<Char>());
-  }
-
-  if (const_check(!is_supported_floating_point(value))) return out;
-
-  using floaty = conditional_t<std::is_same<T, long double>::value, double, T>;
-  using uint = typename dragonbox::float_info<floaty>::carrier_uint;
-  auto bits = bit_cast<uint>(value);
-
-  auto fspecs = float_specs();
-  if (detail::signbit(value)) {
-    fspecs.sign = sign::minus;
-    value = -value;
-  }
-
-  constexpr auto specs = basic_format_specs<Char>();
-  uint mask = exponent_mask<floaty>();
-  if ((bits & mask) == mask)
-    return write_nonfinite(out, std::isinf(value), specs, fspecs);
-
-  auto dec = dragonbox::to_decimal(static_cast<floaty>(value));
-  return write_float(out, dec, specs, fspecs, {});
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(std::is_floating_point<T>::value &&
-                        !is_fast_float<T>::value)>
-inline auto write(OutputIt out, T value) -> OutputIt {
-  return write(out, value, basic_format_specs<Char>());
-}
-
-template <typename Char, typename OutputIt>
-auto write(OutputIt out, monostate, basic_format_specs<Char> = {},
-           locale_ref = {}) -> OutputIt {
-  FMT_ASSERT(false, "");
-  return out;
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> value)
-    -> OutputIt {
-  auto it = reserve(out, value.size());
-  it = copy_str_noinline<Char>(value.begin(), value.end(), it);
-  return base_iterator(out, it);
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(is_string<T>::value)>
-constexpr auto write(OutputIt out, const T& value) -> OutputIt {
-  return write<Char>(out, to_string_view(value));
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(is_integral<T>::value &&
-                        !std::is_same<T, bool>::value &&
-                        !std::is_same<T, Char>::value)>
-FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
-  auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
-  bool negative = is_negative(value);
-  // Don't do -abs_value since it trips unsigned-integer-overflow sanitizer.
-  if (negative) abs_value = ~abs_value + 1;
-  int num_digits = count_digits(abs_value);
-  auto size = (negative ? 1 : 0) + static_cast<size_t>(num_digits);
-  auto it = reserve(out, size);
-  if (auto ptr = to_pointer<Char>(it, size)) {
-    if (negative) *ptr++ = static_cast<Char>('-');
-    format_decimal<Char>(ptr, abs_value, num_digits);
-    return out;
-  }
-  if (negative) *it++ = static_cast<Char>('-');
-  it = format_decimal<Char>(it, abs_value, num_digits).end;
-  return base_iterator(out, it);
-}
-
-// FMT_ENABLE_IF() condition separated to workaround an MSVC bug.
-template <
-    typename Char, typename OutputIt, typename T,
-    bool check =
-        std::is_enum<T>::value && !std::is_same<T, Char>::value &&
-        mapped_type_constant<T, basic_format_context<OutputIt, Char>>::value !=
-            type::custom_type,
-    FMT_ENABLE_IF(check)>
-FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
-  return write<Char>(
-      out, static_cast<typename std::underlying_type<T>::type>(value));
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(std::is_same<T, bool>::value)>
-FMT_CONSTEXPR auto write(OutputIt out, T value,
-                         const basic_format_specs<Char>& specs = {},
-                         locale_ref = {}) -> OutputIt {
-  return specs.type != presentation_type::none &&
-                 specs.type != presentation_type::string
-             ? write(out, value ? 1 : 0, specs, {})
-             : write_bytes(out, value ? "true" : "false", specs);
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, Char value) -> OutputIt {
-  auto it = reserve(out, 1);
-  *it++ = value;
-  return base_iterator(out, it);
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR_CHAR_TRAITS auto write(OutputIt out, const Char* value)
-    -> OutputIt {
-  if (!value) {
-    throw_format_error("string pointer is null");
-  } else {
-    out = write(out, basic_string_view<Char>(value));
-  }
-  return out;
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(std::is_same<T, void>::value)>
-auto write(OutputIt out, const T* value,
-           const basic_format_specs<Char>& specs = {}, locale_ref = {})
-    -> OutputIt {
-  check_pointer_type_spec(specs.type, error_handler());
-  return write_ptr<Char>(out, to_uintptr(value), &specs);
-}
-
-// A write overload that handles implicit conversions.
-template <typename Char, typename OutputIt, typename T,
-          typename Context = basic_format_context<OutputIt, Char>>
-FMT_CONSTEXPR auto write(OutputIt out, const T& value) -> enable_if_t<
-    std::is_class<T>::value && !is_string<T>::value &&
-        !std::is_same<T, Char>::value &&
-        !std::is_same<const T&,
-                      decltype(arg_mapper<Context>().map(value))>::value,
-    OutputIt> {
-  return write<Char>(out, arg_mapper<Context>().map(value));
-}
-
-template <typename Char, typename OutputIt, typename T,
-          typename Context = basic_format_context<OutputIt, Char>>
-FMT_CONSTEXPR auto write(OutputIt out, const T& value)
-    -> enable_if_t<mapped_type_constant<T, Context>::value == type::custom_type,
-                   OutputIt> {
-  using formatter_type =
-      conditional_t<has_formatter<T, Context>::value,
-                    typename Context::template formatter_type<T>,
-                    fallback_formatter<T, Char>>;
-  auto ctx = Context(out, {}, {});
-  return formatter_type().format(value, ctx);
-}
-
-// An argument visitor that formats the argument and writes it via the output
-// iterator. It's a class and not a generic lambda for compatibility with C++11.
-template <typename Char> struct default_arg_formatter {
-  using iterator = buffer_appender<Char>;
-  using context = buffer_context<Char>;
-
-  iterator out;
-  basic_format_args<context> args;
-  locale_ref loc;
-
-  template <typename T> auto operator()(T value) -> iterator {
-    return write<Char>(out, value);
-  }
-  auto operator()(typename basic_format_arg<context>::handle h) -> iterator {
-    basic_format_parse_context<Char> parse_ctx({});
-    context format_ctx(out, args, loc);
-    h.format(parse_ctx, format_ctx);
-    return format_ctx.out();
-  }
-};
-
-template <typename Char> struct arg_formatter {
-  using iterator = buffer_appender<Char>;
-  using context = buffer_context<Char>;
-
-  iterator out;
-  const basic_format_specs<Char>& specs;
-  locale_ref locale;
-
-  template <typename T>
-  FMT_CONSTEXPR FMT_INLINE auto operator()(T value) -> iterator {
-    return detail::write(out, value, specs, locale);
-  }
-  auto operator()(typename basic_format_arg<context>::handle) -> iterator {
-    // User-defined types are handled separately because they require access
-    // to the parse context.
-    return out;
-  }
-};
-
-template <typename Char> struct custom_formatter {
-  basic_format_parse_context<Char>& parse_ctx;
-  buffer_context<Char>& ctx;
-
-  void operator()(
-      typename basic_format_arg<buffer_context<Char>>::handle h) const {
-    h.format(parse_ctx, ctx);
-  }
-  template <typename T> void operator()(T) const {}
-};
-
-template <typename T>
-using is_integer =
-    bool_constant<is_integral<T>::value && !std::is_same<T, bool>::value &&
-                  !std::is_same<T, char>::value &&
-                  !std::is_same<T, wchar_t>::value>;
-
-template <typename ErrorHandler> class width_checker {
- public:
-  explicit FMT_CONSTEXPR width_checker(ErrorHandler& eh) : handler_(eh) {}
-
-  template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
-  FMT_CONSTEXPR auto operator()(T value) -> unsigned long long {
-    if (is_negative(value)) handler_.on_error("negative width");
-    return static_cast<unsigned long long>(value);
-  }
-
-  template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
-  FMT_CONSTEXPR auto operator()(T) -> unsigned long long {
-    handler_.on_error("width is not integer");
-    return 0;
-  }
-
- private:
-  ErrorHandler& handler_;
-};
-
-template <typename ErrorHandler> class precision_checker {
- public:
-  explicit FMT_CONSTEXPR precision_checker(ErrorHandler& eh) : handler_(eh) {}
-
-  template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
-  FMT_CONSTEXPR auto operator()(T value) -> unsigned long long {
-    if (is_negative(value)) handler_.on_error("negative precision");
-    return static_cast<unsigned long long>(value);
-  }
-
-  template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
-  FMT_CONSTEXPR auto operator()(T) -> unsigned long long {
-    handler_.on_error("precision is not integer");
-    return 0;
-  }
-
- private:
-  ErrorHandler& handler_;
-};
-
-template <template <typename> class Handler, typename FormatArg,
-          typename ErrorHandler>
-FMT_CONSTEXPR auto get_dynamic_spec(FormatArg arg, ErrorHandler eh) -> int {
-  unsigned long long value = visit_format_arg(Handler<ErrorHandler>(eh), arg);
-  if (value > to_unsigned(max_value<int>())) eh.on_error("number is too big");
-  return static_cast<int>(value);
-}
-
-template <typename Context, typename ID>
-FMT_CONSTEXPR auto get_arg(Context& ctx, ID id) ->
-    typename Context::format_arg {
-  auto arg = ctx.arg(id);
-  if (!arg) ctx.on_error("argument not found");
-  return arg;
-}
-
-// The standard format specifier handler with checking.
-template <typename Char> class specs_handler : public specs_setter<Char> {
- private:
-  basic_format_parse_context<Char>& parse_context_;
-  buffer_context<Char>& context_;
-
-  // This is only needed for compatibility with gcc 4.4.
-  using format_arg = basic_format_arg<buffer_context<Char>>;
-
-  FMT_CONSTEXPR auto get_arg(auto_id) -> format_arg {
-    return detail::get_arg(context_, parse_context_.next_arg_id());
-  }
-
-  FMT_CONSTEXPR auto get_arg(int arg_id) -> format_arg {
-    parse_context_.check_arg_id(arg_id);
-    return detail::get_arg(context_, arg_id);
-  }
-
-  FMT_CONSTEXPR auto get_arg(basic_string_view<Char> arg_id) -> format_arg {
-    parse_context_.check_arg_id(arg_id);
-    return detail::get_arg(context_, arg_id);
-  }
-
- public:
-  FMT_CONSTEXPR specs_handler(basic_format_specs<Char>& specs,
-                              basic_format_parse_context<Char>& parse_ctx,
-                              buffer_context<Char>& ctx)
-      : specs_setter<Char>(specs), parse_context_(parse_ctx), context_(ctx) {}
-
-  template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
-    this->specs_.width = get_dynamic_spec<width_checker>(
-        get_arg(arg_id), context_.error_handler());
-  }
-
-  template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
-    this->specs_.precision = get_dynamic_spec<precision_checker>(
-        get_arg(arg_id), context_.error_handler());
-  }
-
-  void on_error(const char* message) { context_.on_error(message); }
-};
-
-template <template <typename> class Handler, typename Context>
-FMT_CONSTEXPR void handle_dynamic_spec(int& value,
-                                       arg_ref<typename Context::char_type> ref,
-                                       Context& ctx) {
-  switch (ref.kind) {
-  case arg_id_kind::none:
-    break;
-  case arg_id_kind::index:
-    value = detail::get_dynamic_spec<Handler>(ctx.arg(ref.val.index),
-                                              ctx.error_handler());
-    break;
-  case arg_id_kind::name:
-    value = detail::get_dynamic_spec<Handler>(ctx.arg(ref.val.name),
-                                              ctx.error_handler());
-    break;
-  }
-}
-
-#define FMT_STRING_IMPL(s, base, explicit)                                 \
-  [] {                                                                     \
-    /* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
-    /* Use a macro-like name to avoid shadowing warnings. */               \
-    struct FMT_GCC_VISIBILITY_HIDDEN FMT_COMPILE_STRING : base {           \
-      using char_type = fmt::remove_cvref_t<decltype(s[0])>;               \
-      FMT_MAYBE_UNUSED FMT_CONSTEXPR explicit                              \
-      operator fmt::basic_string_view<char_type>() const {                 \
-        return fmt::detail_exported::compile_string_to_view<char_type>(s); \
-      }                                                                    \
-    };                                                                     \
-    return FMT_COMPILE_STRING();                                           \
-  }()
-
-/**
-  \rst
-  Constructs a compile-time format string from a string literal *s*.
-
-  **Example**::
-
-    // A compile-time error because 'd' is an invalid specifier for strings.
-    std::string s = fmt::format(FMT_STRING("{:d}"), "foo");
-  \endrst
- */
-#define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::compile_string, )
-
-#if FMT_USE_USER_DEFINED_LITERALS
-template <typename Char> struct udl_formatter {
-  basic_string_view<Char> str;
-
-  template <typename... T>
-  auto operator()(T&&... args) const -> std::basic_string<Char> {
-    return vformat(str, fmt::make_args_checked<T...>(str, args...));
-  }
-};
-
-#  if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-template <typename T, typename Char, size_t N,
-          fmt::detail_exported::fixed_string<Char, N> Str>
-struct statically_named_arg : view {
-  static constexpr auto name = Str.data;
-
-  const T& value;
-  statically_named_arg(const T& v) : value(v) {}
-};
-
-template <typename T, typename Char, size_t N,
-          fmt::detail_exported::fixed_string<Char, N> Str>
-struct is_named_arg<statically_named_arg<T, Char, N, Str>> : std::true_type {};
-
-template <typename T, typename Char, size_t N,
-          fmt::detail_exported::fixed_string<Char, N> Str>
-struct is_statically_named_arg<statically_named_arg<T, Char, N, Str>>
-    : std::true_type {};
-
-template <typename Char, size_t N,
-          fmt::detail_exported::fixed_string<Char, N> Str>
-struct udl_arg {
-  template <typename T> auto operator=(T&& value) const {
-    return statically_named_arg<T, Char, N, Str>(std::forward<T>(value));
-  }
-};
-#  else
-template <typename Char> struct udl_arg {
-  const Char* str;
-
-  template <typename T> auto operator=(T&& value) const -> named_arg<Char, T> {
-    return {str, std::forward<T>(value)};
-  }
-};
-#  endif
-#endif  // FMT_USE_USER_DEFINED_LITERALS
-
-template <typename Locale, typename Char>
-auto vformat(const Locale& loc, basic_string_view<Char> format_str,
-             basic_format_args<buffer_context<type_identity_t<Char>>> args)
-    -> std::basic_string<Char> {
-  basic_memory_buffer<Char> buffer;
-  detail::vformat_to(buffer, format_str, args, detail::locale_ref(loc));
-  return {buffer.data(), buffer.size()};
-}
-
-using format_func = void (*)(detail::buffer<char>&, int, const char*);
-
-FMT_API void format_error_code(buffer<char>& out, int error_code,
-                               string_view message) FMT_NOEXCEPT;
-
-FMT_API void report_error(format_func func, int error_code,
-                          const char* message) FMT_NOEXCEPT;
-FMT_END_DETAIL_NAMESPACE
-
-FMT_API auto vsystem_error(int error_code, string_view format_str,
-                           format_args args) -> std::system_error;
-
-/**
- \rst
- Constructs :class:`std::system_error` with a message formatted with
- ``fmt::format(fmt, args...)``.
-  *error_code* is a system error code as given by ``errno``.
-
- **Example**::
-
-   // This throws std::system_error with the description
-   //   cannot open file 'madeup': No such file or directory
-   // or similar (system message may vary).
-   const char* filename = "madeup";
-   std::FILE* file = std::fopen(filename, "r");
-   if (!file)
-     throw fmt::system_error(errno, "cannot open file '{}'", filename);
- \endrst
-*/
-template <typename... T>
-auto system_error(int error_code, format_string<T...> fmt, T&&... args)
-    -> std::system_error {
-  return vsystem_error(error_code, fmt, fmt::make_format_args(args...));
-}
-
-/**
-  \rst
-  Formats an error message for an error returned by an operating system or a
-  language runtime, for example a file opening error, and writes it to *out*.
-  The format is the same as the one used by ``std::system_error(ec, message)``
-  where ``ec`` is ``std::error_code(error_code, std::generic_category()})``.
-  It is implementation-defined but normally looks like:
-
-  .. parsed-literal::
-     *<message>*: *<system-message>*
-
-  where *<message>* is the passed message and *<system-message>* is the system
-  message corresponding to the error code.
-  *error_code* is a system error code as given by ``errno``.
-  \endrst
- */
-FMT_API void format_system_error(detail::buffer<char>& out, int error_code,
-                                 const char* message) FMT_NOEXCEPT;
-
-// Reports a system error without throwing an exception.
-// Can be used to report errors from destructors.
-FMT_API void report_system_error(int error_code,
-                                 const char* message) FMT_NOEXCEPT;
-
-/** Fast integer formatter. */
-class format_int {
- private:
-  // Buffer should be large enough to hold all digits (digits10 + 1),
-  // a sign and a null character.
-  enum { buffer_size = std::numeric_limits<unsigned long long>::digits10 + 3 };
-  mutable char buffer_[buffer_size];
-  char* str_;
-
-  template <typename UInt> auto format_unsigned(UInt value) -> char* {
-    auto n = static_cast<detail::uint32_or_64_or_128_t<UInt>>(value);
-    return detail::format_decimal(buffer_, n, buffer_size - 1).begin;
-  }
-
-  template <typename Int> auto format_signed(Int value) -> char* {
-    auto abs_value = static_cast<detail::uint32_or_64_or_128_t<Int>>(value);
-    bool negative = value < 0;
-    if (negative) abs_value = 0 - abs_value;
-    auto begin = format_unsigned(abs_value);
-    if (negative) *--begin = '-';
-    return begin;
-  }
-
- public:
-  explicit format_int(int value) : str_(format_signed(value)) {}
-  explicit format_int(long value) : str_(format_signed(value)) {}
-  explicit format_int(long long value) : str_(format_signed(value)) {}
-  explicit format_int(unsigned value) : str_(format_unsigned(value)) {}
-  explicit format_int(unsigned long value) : str_(format_unsigned(value)) {}
-  explicit format_int(unsigned long long value)
-      : str_(format_unsigned(value)) {}
-
-  /** Returns the number of characters written to the output buffer. */
-  auto size() const -> size_t {
-    return detail::to_unsigned(buffer_ - str_ + buffer_size - 1);
-  }
-
-  /**
-    Returns a pointer to the output buffer content. No terminating null
-    character is appended.
-   */
-  auto data() const -> const char* { return str_; }
-
-  /**
-    Returns a pointer to the output buffer content with terminating null
-    character appended.
-   */
-  auto c_str() const -> const char* {
-    buffer_[buffer_size - 1] = '\0';
-    return str_;
-  }
-
-  /**
-    \rst
-    Returns the content of the output buffer as an ``std::string``.
-    \endrst
-   */
-  auto str() const -> std::string { return std::string(str_, size()); }
-};
-
-template <typename T, typename Char>
-template <typename FormatContext>
-FMT_CONSTEXPR FMT_INLINE auto
-formatter<T, Char,
-          enable_if_t<detail::type_constant<T, Char>::value !=
-                      detail::type::custom_type>>::format(const T& val,
-                                                          FormatContext& ctx)
-    const -> decltype(ctx.out()) {
-  if (specs_.width_ref.kind != detail::arg_id_kind::none ||
-      specs_.precision_ref.kind != detail::arg_id_kind::none) {
-    auto specs = specs_;
-    detail::handle_dynamic_spec<detail::width_checker>(specs.width,
-                                                       specs.width_ref, ctx);
-    detail::handle_dynamic_spec<detail::precision_checker>(
-        specs.precision, specs.precision_ref, ctx);
-    return detail::write<Char>(ctx.out(), val, specs, ctx.locale());
-  }
-  return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
-}
-
-#define FMT_FORMAT_AS(Type, Base)                                        \
-  template <typename Char>                                               \
-  struct formatter<Type, Char> : formatter<Base, Char> {                 \
-    template <typename FormatContext>                                    \
-    auto format(Type const& val, FormatContext& ctx) const               \
-        -> decltype(ctx.out()) {                                         \
-      return formatter<Base, Char>::format(static_cast<Base>(val), ctx); \
-    }                                                                    \
-  }
-
-FMT_FORMAT_AS(signed char, int);
-FMT_FORMAT_AS(unsigned char, unsigned);
-FMT_FORMAT_AS(short, int);
-FMT_FORMAT_AS(unsigned short, unsigned);
-FMT_FORMAT_AS(long, long long);
-FMT_FORMAT_AS(unsigned long, unsigned long long);
-FMT_FORMAT_AS(Char*, const Char*);
-FMT_FORMAT_AS(std::basic_string<Char>, basic_string_view<Char>);
-FMT_FORMAT_AS(std::nullptr_t, const void*);
-FMT_FORMAT_AS(detail::byte, unsigned char);
-FMT_FORMAT_AS(detail::std_string_view<Char>, basic_string_view<Char>);
-
-template <typename Char>
-struct formatter<void*, Char> : formatter<const void*, Char> {
-  template <typename FormatContext>
-  auto format(void* val, FormatContext& ctx) const -> decltype(ctx.out()) {
-    return formatter<const void*, Char>::format(val, ctx);
-  }
-};
-
-template <typename Char, size_t N>
-struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {
-  template <typename FormatContext>
-  FMT_CONSTEXPR auto format(const Char* val, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    return formatter<basic_string_view<Char>, Char>::format(val, ctx);
-  }
-};
-
-// A formatter for types known only at run time such as variant alternatives.
-//
-// Usage:
-//   using variant = std::variant<int, std::string>;
-//   template <>
-//   struct formatter<variant>: dynamic_formatter<> {
-//     auto format(const variant& v, format_context& ctx) {
-//       return visit([&](const auto& val) {
-//           return dynamic_formatter<>::format(val, ctx);
-//       }, v);
-//     }
-//   };
-template <typename Char = char> class dynamic_formatter {
- private:
-  detail::dynamic_format_specs<Char> specs_;
-  const Char* format_str_;
-
-  struct null_handler : detail::error_handler {
-    void on_align(align_t) {}
-    void on_sign(sign_t) {}
-    void on_hash() {}
-  };
-
-  template <typename Context> void handle_specs(Context& ctx) {
-    detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
-                                                       specs_.width_ref, ctx);
-    detail::handle_dynamic_spec<detail::precision_checker>(
-        specs_.precision, specs_.precision_ref, ctx);
-  }
-
- public:
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    format_str_ = ctx.begin();
-    // Checks are deferred to formatting time when the argument type is known.
-    detail::dynamic_specs_handler<ParseContext> handler(specs_, ctx);
-    return detail::parse_format_specs(ctx.begin(), ctx.end(), handler);
-  }
-
-  template <typename T, typename FormatContext>
-  auto format(const T& val, FormatContext& ctx) -> decltype(ctx.out()) {
-    handle_specs(ctx);
-    detail::specs_checker<null_handler> checker(
-        null_handler(), detail::mapped_type_constant<T, FormatContext>::value);
-    checker.on_align(specs_.align);
-    if (specs_.sign != sign::none) checker.on_sign(specs_.sign);
-    if (specs_.alt) checker.on_hash();
-    if (specs_.precision >= 0) checker.end_precision();
-    return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
-  }
-};
-
-/**
-  \rst
-  Converts ``p`` to ``const void*`` for pointer formatting.
-
-  **Example**::
-
-    auto s = fmt::format("{}", fmt::ptr(p));
-  \endrst
- */
-template <typename T> auto ptr(T p) -> const void* {
-  static_assert(std::is_pointer<T>::value, "");
-  return detail::bit_cast<const void*>(p);
-}
-template <typename T> auto ptr(const std::unique_ptr<T>& p) -> const void* {
-  return p.get();
-}
-template <typename T> auto ptr(const std::shared_ptr<T>& p) -> const void* {
-  return p.get();
-}
-
-class bytes {
- private:
-  string_view data_;
-  friend struct formatter<bytes>;
-
- public:
-  explicit bytes(string_view data) : data_(data) {}
-};
-
-template <> struct formatter<bytes> {
- private:
-  detail::dynamic_format_specs<char> specs_;
-
- public:
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    using handler_type = detail::dynamic_specs_handler<ParseContext>;
-    detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
-                                                detail::type::string_type);
-    auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
-    detail::check_string_type_spec(specs_.type, ctx.error_handler());
-    return it;
-  }
-
-  template <typename FormatContext>
-  auto format(bytes b, FormatContext& ctx) -> decltype(ctx.out()) {
-    detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
-                                                       specs_.width_ref, ctx);
-    detail::handle_dynamic_spec<detail::precision_checker>(
-        specs_.precision, specs_.precision_ref, ctx);
-    return detail::write_bytes(ctx.out(), b.data_, specs_);
-  }
-};
-
-// group_digits_view is not derived from view because it copies the argument.
-template <typename T> struct group_digits_view { T value; };
-
-/**
-  \rst
-  Returns a view that formats an integer value using ',' as a locale-independent
-  thousands separator.
-
-  **Example**::
-
-    fmt::print("{}", fmt::group_digits(12345));
-    // Output: "12,345"
-  \endrst
- */
-template <typename T> auto group_digits(T value) -> group_digits_view<T> {
-  return {value};
-}
-
-template <typename T> struct formatter<group_digits_view<T>> : formatter<T> {
- private:
-  detail::dynamic_format_specs<char> specs_;
-
- public:
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    using handler_type = detail::dynamic_specs_handler<ParseContext>;
-    detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
-                                                detail::type::int_type);
-    auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
-    detail::check_string_type_spec(specs_.type, ctx.error_handler());
-    return it;
-  }
-
-  template <typename FormatContext>
-  auto format(group_digits_view<T> t, FormatContext& ctx)
-      -> decltype(ctx.out()) {
-    detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
-                                                       specs_.width_ref, ctx);
-    detail::handle_dynamic_spec<detail::precision_checker>(
-        specs_.precision, specs_.precision_ref, ctx);
-    return detail::write_int_localized(
-        ctx.out(), static_cast<detail::uint64_or_128_t<T>>(t.value), 0, specs_,
-        detail::digit_grouping<char>({"\3", ','}));
-  }
-};
-
-template <typename It, typename Sentinel, typename Char = char>
-struct join_view : detail::view {
-  It begin;
-  Sentinel end;
-  basic_string_view<Char> sep;
-
-  join_view(It b, Sentinel e, basic_string_view<Char> s)
-      : begin(b), end(e), sep(s) {}
-};
-
-template <typename It, typename Sentinel, typename Char>
-using arg_join FMT_DEPRECATED_ALIAS = join_view<It, Sentinel, Char>;
-
-template <typename It, typename Sentinel, typename Char>
-struct formatter<join_view<It, Sentinel, Char>, Char> {
- private:
-  using value_type =
-#ifdef __cpp_lib_ranges
-      std::iter_value_t<It>;
-#else
-      typename std::iterator_traits<It>::value_type;
-#endif
-  using context = buffer_context<Char>;
-  using mapper = detail::arg_mapper<context>;
-
-  template <typename T, FMT_ENABLE_IF(has_formatter<T, context>::value)>
-  static auto map(const T& value) -> const T& {
-    return value;
-  }
-  template <typename T, FMT_ENABLE_IF(!has_formatter<T, context>::value)>
-  static auto map(const T& value) -> decltype(mapper().map(value)) {
-    return mapper().map(value);
-  }
-
-  using formatter_type =
-      conditional_t<is_formattable<value_type, Char>::value,
-                    formatter<remove_cvref_t<decltype(map(
-                                  std::declval<const value_type&>()))>,
-                              Char>,
-                    detail::fallback_formatter<value_type, Char>>;
-
-  formatter_type value_formatter_;
-
- public:
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return value_formatter_.parse(ctx);
-  }
-
-  template <typename FormatContext>
-  auto format(const join_view<It, Sentinel, Char>& value, FormatContext& ctx)
-      -> decltype(ctx.out()) {
-    auto it = value.begin;
-    auto out = ctx.out();
-    if (it != value.end) {
-      out = value_formatter_.format(map(*it), ctx);
-      ++it;
-      while (it != value.end) {
-        out = detail::copy_str<Char>(value.sep.begin(), value.sep.end(), out);
-        ctx.advance_to(out);
-        out = value_formatter_.format(map(*it), ctx);
-        ++it;
-      }
-    }
-    return out;
-  }
-};
-
-/**
-  Returns a view that formats the iterator range `[begin, end)` with elements
-  separated by `sep`.
- */
-template <typename It, typename Sentinel>
-auto join(It begin, Sentinel end, string_view sep) -> join_view<It, Sentinel> {
-  return {begin, end, sep};
-}
-
-/**
-  \rst
-  Returns a view that formats `range` with elements separated by `sep`.
-
-  **Example**::
-
-    std::vector<int> v = {1, 2, 3};
-    fmt::print("{}", fmt::join(v, ", "));
-    // Output: "1, 2, 3"
-
-  ``fmt::join`` applies passed format specifiers to the range elements::
-
-    fmt::print("{:02}", fmt::join(v, ", "));
-    // Output: "01, 02, 03"
-  \endrst
- */
-template <typename Range>
-auto join(Range&& range, string_view sep)
-    -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>> {
-  return join(std::begin(range), std::end(range), sep);
-}
-
-/**
-  \rst
-  Converts *value* to ``std::string`` using the default format for type *T*.
-
-  **Example**::
-
-    #include <fmt/format.h>
-
-    std::string answer = fmt::to_string(42);
-  \endrst
- */
-template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
-inline auto to_string(const T& value) -> std::string {
-  auto result = std::string();
-  detail::write<char>(std::back_inserter(result), value);
-  return result;
-}
-
-template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-FMT_NODISCARD inline auto to_string(T value) -> std::string {
-  // The buffer should be large enough to store the number including the sign
-  // or "false" for bool.
-  constexpr int max_size = detail::digits10<T>() + 2;
-  char buffer[max_size > 5 ? static_cast<unsigned>(max_size) : 5];
-  char* begin = buffer;
-  return std::string(begin, detail::write<char>(begin, value));
-}
-
-template <typename Char, size_t SIZE>
-FMT_NODISCARD auto to_string(const basic_memory_buffer<Char, SIZE>& buf)
-    -> std::basic_string<Char> {
-  auto size = buf.size();
-  detail::assume(size < std::basic_string<Char>().max_size());
-  return std::basic_string<Char>(buf.data(), size);
-}
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
-template <typename Char>
-void vformat_to(
-    buffer<Char>& buf, basic_string_view<Char> fmt,
-    basic_format_args<FMT_BUFFER_CONTEXT(type_identity_t<Char>)> args,
-    locale_ref loc) {
-  // workaround for msvc bug regarding name-lookup in module
-  // link names into function scope
-  using detail::arg_formatter;
-  using detail::buffer_appender;
-  using detail::custom_formatter;
-  using detail::default_arg_formatter;
-  using detail::get_arg;
-  using detail::locale_ref;
-  using detail::parse_format_specs;
-  using detail::specs_checker;
-  using detail::specs_handler;
-  using detail::to_unsigned;
-  using detail::type;
-  using detail::write;
-  auto out = buffer_appender<Char>(buf);
-  if (fmt.size() == 2 && equal2(fmt.data(), "{}")) {
-    auto arg = args.get(0);
-    if (!arg) error_handler().on_error("argument not found");
-    visit_format_arg(default_arg_formatter<Char>{out, args, loc}, arg);
-    return;
-  }
-
-  struct format_handler : error_handler {
-    basic_format_parse_context<Char> parse_context;
-    buffer_context<Char> context;
-
-    format_handler(buffer_appender<Char> out, basic_string_view<Char> str,
-                   basic_format_args<buffer_context<Char>> args, locale_ref loc)
-        : parse_context(str), context(out, args, loc) {}
-
-    void on_text(const Char* begin, const Char* end) {
-      auto text = basic_string_view<Char>(begin, to_unsigned(end - begin));
-      context.advance_to(write<Char>(context.out(), text));
-    }
-
-    FMT_CONSTEXPR auto on_arg_id() -> int {
-      return parse_context.next_arg_id();
-    }
-    FMT_CONSTEXPR auto on_arg_id(int id) -> int {
-      return parse_context.check_arg_id(id), id;
-    }
-    FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
-      int arg_id = context.arg_id(id);
-      if (arg_id < 0) on_error("argument not found");
-      return arg_id;
-    }
-
-    FMT_INLINE void on_replacement_field(int id, const Char*) {
-      auto arg = get_arg(context, id);
-      context.advance_to(visit_format_arg(
-          default_arg_formatter<Char>{context.out(), context.args(),
-                                      context.locale()},
-          arg));
-    }
-
-    auto on_format_specs(int id, const Char* begin, const Char* end)
-        -> const Char* {
-      auto arg = get_arg(context, id);
-      if (arg.type() == type::custom_type) {
-        parse_context.advance_to(parse_context.begin() +
-                                 (begin - &*parse_context.begin()));
-        visit_format_arg(custom_formatter<Char>{parse_context, context}, arg);
-        return parse_context.begin();
-      }
-      auto specs = basic_format_specs<Char>();
-      specs_checker<specs_handler<Char>> handler(
-          specs_handler<Char>(specs, parse_context, context), arg.type());
-      begin = parse_format_specs(begin, end, handler);
-      if (begin == end || *begin != '}')
-        on_error("missing '}' in format string");
-      auto f = arg_formatter<Char>{context.out(), specs, context.locale()};
-      context.advance_to(visit_format_arg(f, arg));
-      return begin;
-    }
-  };
-  detail::parse_format_string<false>(fmt, format_handler(out, fmt, args, loc));
-}
-
-#ifndef FMT_HEADER_ONLY
-extern template FMT_API auto thousands_sep_impl<char>(locale_ref)
-    -> thousands_sep_result<char>;
-extern template FMT_API auto thousands_sep_impl<wchar_t>(locale_ref)
-    -> thousands_sep_result<wchar_t>;
-extern template FMT_API auto decimal_point_impl(locale_ref) -> char;
-extern template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
-extern template auto format_float<double>(double value, int precision,
-                                          float_specs specs, buffer<char>& buf)
-    -> int;
-extern template auto format_float<long double>(long double value, int precision,
-                                               float_specs specs,
-                                               buffer<char>& buf) -> int;
-void snprintf_float(float, int, float_specs, buffer<char>&) = delete;
-extern template auto snprintf_float<double>(double value, int precision,
-                                            float_specs specs,
-                                            buffer<char>& buf) -> int;
-extern template auto snprintf_float<long double>(long double value,
-                                                 int precision,
-                                                 float_specs specs,
-                                                 buffer<char>& buf) -> int;
-#endif  // FMT_HEADER_ONLY
-
-FMT_END_DETAIL_NAMESPACE
-
-#if FMT_USE_USER_DEFINED_LITERALS
-inline namespace literals {
-/**
-  \rst
-  User-defined literal equivalent of :func:`fmt::arg`.
-
-  **Example**::
-
-    using namespace fmt::literals;
-    fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
-  \endrst
- */
-#  if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-template <detail_exported::fixed_string Str>
-constexpr auto operator""_a()
-    -> detail::udl_arg<remove_cvref_t<decltype(Str.data[0])>,
-                       sizeof(Str.data) / sizeof(decltype(Str.data[0])), Str> {
-  return {};
-}
-#  else
-constexpr auto operator"" _a(const char* s, size_t) -> detail::udl_arg<char> {
-  return {s};
-}
-#  endif
-
-// DEPRECATED!
-// User-defined literal equivalent of fmt::format.
-FMT_DEPRECATED constexpr auto operator"" _format(const char* s, size_t n)
-    -> detail::udl_formatter<char> {
-  return {{s, n}};
-}
-}  // namespace literals
-#endif  // FMT_USE_USER_DEFINED_LITERALS
-
-template <typename Locale, FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
-inline auto vformat(const Locale& loc, string_view fmt, format_args args)
-    -> std::string {
-  return detail::vformat(loc, fmt, args);
-}
-
-template <typename Locale, typename... T,
-          FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
-inline auto format(const Locale& loc, format_string<T...> fmt, T&&... args)
-    -> std::string {
-  return vformat(loc, string_view(fmt), fmt::make_format_args(args...));
-}
-
-template <typename... T, size_t SIZE, typename Allocator>
-FMT_DEPRECATED auto format_to(basic_memory_buffer<char, SIZE, Allocator>& buf,
-                              format_string<T...> fmt, T&&... args)
-    -> appender {
-  detail::vformat_to(buf, string_view(fmt), fmt::make_format_args(args...));
-  return appender(buf);
-}
-
-template <typename OutputIt, typename Locale,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value&&
-                            detail::is_locale<Locale>::value)>
-auto vformat_to(OutputIt out, const Locale& loc, string_view fmt,
-                format_args args) -> OutputIt {
-  using detail::get_buffer;
-  auto&& buf = get_buffer<char>(out);
-  detail::vformat_to(buf, fmt, args, detail::locale_ref(loc));
-  return detail::get_iterator(buf);
-}
-
-template <typename OutputIt, typename Locale, typename... T,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value&&
-                            detail::is_locale<Locale>::value)>
-FMT_INLINE auto format_to(OutputIt out, const Locale& loc,
-                          format_string<T...> fmt, T&&... args) -> OutputIt {
-  return vformat_to(out, loc, fmt, fmt::make_format_args(args...));
-}
-
-FMT_MODULE_EXPORT_END
-FMT_END_NAMESPACE
-
-#ifdef FMT_DEPRECATED_INCLUDE_XCHAR
-#  include "xchar.h"
-#endif
-
-#ifdef FMT_HEADER_ONLY
-#  define FMT_FUNC inline
-#  include "format-inl.h"
-#else
-#  define FMT_FUNC
-#endif
-
-#endif  // FMT_FORMAT_H_
diff --git a/3rdparty/fmt/include/fmt/locale.h b/3rdparty/fmt/include/fmt/locale.h
deleted file mode 100644
index 7571b526..00000000
--- a/3rdparty/fmt/include/fmt/locale.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#include "xchar.h"
-#warning fmt/locale.h is deprecated, include fmt/format.h or fmt/xchar.h instead
diff --git a/3rdparty/fmt/include/fmt/os.h b/3rdparty/fmt/include/fmt/os.h
deleted file mode 100644
index b64f8bbf..00000000
--- a/3rdparty/fmt/include/fmt/os.h
+++ /dev/null
@@ -1,527 +0,0 @@
-// Formatting library for C++ - optional OS-specific functionality
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_OS_H_
-#define FMT_OS_H_
-
-#include <cerrno>
-#include <clocale>  // locale_t
-#include <cstddef>
-#include <cstdio>
-#include <cstdlib>       // strtod_l
-#include <system_error>  // std::system_error
-
-#if defined __APPLE__ || defined(__FreeBSD__)
-#  include <xlocale.h>  // for LC_NUMERIC_MASK on OS X
-#endif
-
-#include "format.h"
-
-#ifndef FMT_USE_FCNTL
-// UWP doesn't provide _pipe.
-#  if FMT_HAS_INCLUDE("winapifamily.h")
-#    include <winapifamily.h>
-#  endif
-#  if (FMT_HAS_INCLUDE(<fcntl.h>) || defined(__APPLE__) || \
-       defined(__linux__)) &&                              \
-      (!defined(WINAPI_FAMILY) ||                          \
-       (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
-#    include <fcntl.h>  // for O_RDONLY
-#    define FMT_USE_FCNTL 1
-#  else
-#    define FMT_USE_FCNTL 0
-#  endif
-#endif
-
-#ifndef FMT_POSIX
-#  if defined(_WIN32) && !defined(__MINGW32__)
-// Fix warnings about deprecated symbols.
-#    define FMT_POSIX(call) _##call
-#  else
-#    define FMT_POSIX(call) call
-#  endif
-#endif
-
-// Calls to system functions are wrapped in FMT_SYSTEM for testability.
-#ifdef FMT_SYSTEM
-#  define FMT_POSIX_CALL(call) FMT_SYSTEM(call)
-#else
-#  define FMT_SYSTEM(call) ::call
-#  ifdef _WIN32
-// Fix warnings about deprecated symbols.
-#    define FMT_POSIX_CALL(call) ::_##call
-#  else
-#    define FMT_POSIX_CALL(call) ::call
-#  endif
-#endif
-
-// Retries the expression while it evaluates to error_result and errno
-// equals to EINTR.
-#ifndef _WIN32
-#  define FMT_RETRY_VAL(result, expression, error_result) \
-    do {                                                  \
-      (result) = (expression);                            \
-    } while ((result) == (error_result) && errno == EINTR)
-#else
-#  define FMT_RETRY_VAL(result, expression, error_result) result = (expression)
-#endif
-
-#define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1)
-
-FMT_BEGIN_NAMESPACE
-FMT_MODULE_EXPORT_BEGIN
-
-/**
-  \rst
-  A reference to a null-terminated string. It can be constructed from a C
-  string or ``std::string``.
-
-  You can use one of the following type aliases for common character types:
-
-  +---------------+-----------------------------+
-  | Type          | Definition                  |
-  +===============+=============================+
-  | cstring_view  | basic_cstring_view<char>    |
-  +---------------+-----------------------------+
-  | wcstring_view | basic_cstring_view<wchar_t> |
-  +---------------+-----------------------------+
-
-  This class is most useful as a parameter type to allow passing
-  different types of strings to a function, for example::
-
-    template <typename... Args>
-    std::string format(cstring_view format_str, const Args & ... args);
-
-    format("{}", 42);
-    format(std::string("{}"), 42);
-  \endrst
- */
-template <typename Char> class basic_cstring_view {
- private:
-  const Char* data_;
-
- public:
-  /** Constructs a string reference object from a C string. */
-  basic_cstring_view(const Char* s) : data_(s) {}
-
-  /**
-    \rst
-    Constructs a string reference from an ``std::string`` object.
-    \endrst
-   */
-  basic_cstring_view(const std::basic_string<Char>& s) : data_(s.c_str()) {}
-
-  /** Returns the pointer to a C string. */
-  const Char* c_str() const { return data_; }
-};
-
-using cstring_view = basic_cstring_view<char>;
-using wcstring_view = basic_cstring_view<wchar_t>;
-
-template <typename Char> struct formatter<std::error_code, Char> {
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  template <typename FormatContext>
-  FMT_CONSTEXPR auto format(const std::error_code& ec, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    auto out = ctx.out();
-    out = detail::write_bytes(out, ec.category().name(),
-                              basic_format_specs<Char>());
-    out = detail::write<Char>(out, Char(':'));
-    out = detail::write<Char>(out, ec.value());
-    return out;
-  }
-};
-
-#ifdef _WIN32
-FMT_API const std::error_category& system_category() FMT_NOEXCEPT;
-
-FMT_BEGIN_DETAIL_NAMESPACE
-// A converter from UTF-16 to UTF-8.
-// It is only provided for Windows since other systems support UTF-8 natively.
-class utf16_to_utf8 {
- private:
-  memory_buffer buffer_;
-
- public:
-  utf16_to_utf8() {}
-  FMT_API explicit utf16_to_utf8(basic_string_view<wchar_t> s);
-  operator string_view() const { return string_view(&buffer_[0], size()); }
-  size_t size() const { return buffer_.size() - 1; }
-  const char* c_str() const { return &buffer_[0]; }
-  std::string str() const { return std::string(&buffer_[0], size()); }
-
-  // Performs conversion returning a system error code instead of
-  // throwing exception on conversion error. This method may still throw
-  // in case of memory allocation error.
-  FMT_API int convert(basic_string_view<wchar_t> s);
-};
-
-FMT_API void format_windows_error(buffer<char>& out, int error_code,
-                                  const char* message) FMT_NOEXCEPT;
-FMT_END_DETAIL_NAMESPACE
-
-FMT_API std::system_error vwindows_error(int error_code, string_view format_str,
-                                         format_args args);
-
-/**
- \rst
- Constructs a :class:`std::system_error` object with the description
- of the form
-
- .. parsed-literal::
-   *<message>*: *<system-message>*
-
- where *<message>* is the formatted message and *<system-message>* is the
- system message corresponding to the error code.
- *error_code* is a Windows error code as given by ``GetLastError``.
- If *error_code* is not a valid error code such as -1, the system message
- will look like "error -1".
-
- **Example**::
-
-   // This throws a system_error with the description
-   //   cannot open file 'madeup': The system cannot find the file specified.
-   // or similar (system message may vary).
-   const char *filename = "madeup";
-   LPOFSTRUCT of = LPOFSTRUCT();
-   HFILE file = OpenFile(filename, &of, OF_READ);
-   if (file == HFILE_ERROR) {
-     throw fmt::windows_error(GetLastError(),
-                              "cannot open file '{}'", filename);
-   }
- \endrst
-*/
-template <typename... Args>
-std::system_error windows_error(int error_code, string_view message,
-                                const Args&... args) {
-  return vwindows_error(error_code, message, fmt::make_format_args(args...));
-}
-
-// Reports a Windows error without throwing an exception.
-// Can be used to report errors from destructors.
-FMT_API void report_windows_error(int error_code,
-                                  const char* message) FMT_NOEXCEPT;
-#else
-inline const std::error_category& system_category() FMT_NOEXCEPT {
-  return std::system_category();
-}
-#endif  // _WIN32
-
-// std::system is not available on some platforms such as iOS (#2248).
-#ifdef __OSX__
-template <typename S, typename... Args, typename Char = char_t<S>>
-void say(const S& format_str, Args&&... args) {
-  std::system(format("say \"{}\"", format(format_str, args...)).c_str());
-}
-#endif
-
-// A buffered file.
-class buffered_file {
- private:
-  FILE* file_;
-
-  friend class file;
-
-  explicit buffered_file(FILE* f) : file_(f) {}
-
- public:
-  buffered_file(const buffered_file&) = delete;
-  void operator=(const buffered_file&) = delete;
-
-  // Constructs a buffered_file object which doesn't represent any file.
-  buffered_file() FMT_NOEXCEPT : file_(nullptr) {}
-
-  // Destroys the object closing the file it represents if any.
-  FMT_API ~buffered_file() FMT_NOEXCEPT;
-
- public:
-  buffered_file(buffered_file&& other) FMT_NOEXCEPT : file_(other.file_) {
-    other.file_ = nullptr;
-  }
-
-  buffered_file& operator=(buffered_file&& other) {
-    close();
-    file_ = other.file_;
-    other.file_ = nullptr;
-    return *this;
-  }
-
-  // Opens a file.
-  FMT_API buffered_file(cstring_view filename, cstring_view mode);
-
-  // Closes the file.
-  FMT_API void close();
-
-  // Returns the pointer to a FILE object representing this file.
-  FILE* get() const FMT_NOEXCEPT { return file_; }
-
-  // We place parentheses around fileno to workaround a bug in some versions
-  // of MinGW that define fileno as a macro.
-  FMT_API int(fileno)() const;
-
-  void vprint(string_view format_str, format_args args) {
-    fmt::vprint(file_, format_str, args);
-  }
-
-  template <typename... Args>
-  inline void print(string_view format_str, const Args&... args) {
-    vprint(format_str, fmt::make_format_args(args...));
-  }
-};
-
-#if FMT_USE_FCNTL
-// A file. Closed file is represented by a file object with descriptor -1.
-// Methods that are not declared with FMT_NOEXCEPT may throw
-// fmt::system_error in case of failure. Note that some errors such as
-// closing the file multiple times will cause a crash on Windows rather
-// than an exception. You can get standard behavior by overriding the
-// invalid parameter handler with _set_invalid_parameter_handler.
-class file {
- private:
-  int fd_;  // File descriptor.
-
-  // Constructs a file object with a given descriptor.
-  explicit file(int fd) : fd_(fd) {}
-
- public:
-  // Possible values for the oflag argument to the constructor.
-  enum {
-    RDONLY = FMT_POSIX(O_RDONLY),  // Open for reading only.
-    WRONLY = FMT_POSIX(O_WRONLY),  // Open for writing only.
-    RDWR = FMT_POSIX(O_RDWR),      // Open for reading and writing.
-    CREATE = FMT_POSIX(O_CREAT),   // Create if the file doesn't exist.
-    APPEND = FMT_POSIX(O_APPEND),  // Open in append mode.
-    TRUNC = FMT_POSIX(O_TRUNC)     // Truncate the content of the file.
-  };
-
-  // Constructs a file object which doesn't represent any file.
-  file() FMT_NOEXCEPT : fd_(-1) {}
-
-  // Opens a file and constructs a file object representing this file.
-  FMT_API file(cstring_view path, int oflag);
-
- public:
-  file(const file&) = delete;
-  void operator=(const file&) = delete;
-
-  file(file&& other) FMT_NOEXCEPT : fd_(other.fd_) { other.fd_ = -1; }
-
-  // Move assignment is not noexcept because close may throw.
-  file& operator=(file&& other) {
-    close();
-    fd_ = other.fd_;
-    other.fd_ = -1;
-    return *this;
-  }
-
-  // Destroys the object closing the file it represents if any.
-  FMT_API ~file() FMT_NOEXCEPT;
-
-  // Returns the file descriptor.
-  int descriptor() const FMT_NOEXCEPT { return fd_; }
-
-  // Closes the file.
-  FMT_API void close();
-
-  // Returns the file size. The size has signed type for consistency with
-  // stat::st_size.
-  FMT_API long long size() const;
-
-  // Attempts to read count bytes from the file into the specified buffer.
-  FMT_API size_t read(void* buffer, size_t count);
-
-  // Attempts to write count bytes from the specified buffer to the file.
-  FMT_API size_t write(const void* buffer, size_t count);
-
-  // Duplicates a file descriptor with the dup function and returns
-  // the duplicate as a file object.
-  FMT_API static file dup(int fd);
-
-  // Makes fd be the copy of this file descriptor, closing fd first if
-  // necessary.
-  FMT_API void dup2(int fd);
-
-  // Makes fd be the copy of this file descriptor, closing fd first if
-  // necessary.
-  FMT_API void dup2(int fd, std::error_code& ec) FMT_NOEXCEPT;
-
-  // Creates a pipe setting up read_end and write_end file objects for reading
-  // and writing respectively.
-  FMT_API static void pipe(file& read_end, file& write_end);
-
-  // Creates a buffered_file object associated with this file and detaches
-  // this file object from the file.
-  FMT_API buffered_file fdopen(const char* mode);
-};
-
-// Returns the memory page size.
-long getpagesize();
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
-struct buffer_size {
-  buffer_size() = default;
-  size_t value = 0;
-  buffer_size operator=(size_t val) const {
-    auto bs = buffer_size();
-    bs.value = val;
-    return bs;
-  }
-};
-
-struct ostream_params {
-  int oflag = file::WRONLY | file::CREATE | file::TRUNC;
-  size_t buffer_size = BUFSIZ > 32768 ? BUFSIZ : 32768;
-
-  ostream_params() {}
-
-  template <typename... T>
-  ostream_params(T... params, int new_oflag) : ostream_params(params...) {
-    oflag = new_oflag;
-  }
-
-  template <typename... T>
-  ostream_params(T... params, detail::buffer_size bs)
-      : ostream_params(params...) {
-    this->buffer_size = bs.value;
-  }
-
-// Intel has a bug that results in failure to deduce a constructor
-// for empty parameter packs.
-#  if defined(__INTEL_COMPILER) && __INTEL_COMPILER < 2000
-  ostream_params(int new_oflag) : oflag(new_oflag) {}
-  ostream_params(detail::buffer_size bs) : buffer_size(bs.value) {}
-#  endif
-};
-
-FMT_END_DETAIL_NAMESPACE
-
-// Added {} below to work around default constructor error known to
-// occur in Xcode versions 7.2.1 and 8.2.1.
-constexpr detail::buffer_size buffer_size{};
-
-/** A fast output stream which is not thread-safe. */
-class FMT_API ostream final : private detail::buffer<char> {
- private:
-  file file_;
-
-  void grow(size_t) override;
-
-  ostream(cstring_view path, const detail::ostream_params& params)
-      : file_(path, params.oflag) {
-    set(new char[params.buffer_size], params.buffer_size);
-  }
-
- public:
-  ostream(ostream&& other)
-      : detail::buffer<char>(other.data(), other.size(), other.capacity()),
-        file_(std::move(other.file_)) {
-    other.clear();
-    other.set(nullptr, 0);
-  }
-  ~ostream() {
-    flush();
-    delete[] data();
-  }
-
-  void flush() {
-    if (size() == 0) return;
-    file_.write(data(), size());
-    clear();
-  }
-
-  template <typename... T>
-  friend ostream output_file(cstring_view path, T... params);
-
-  void close() {
-    flush();
-    file_.close();
-  }
-
-  /**
-    Formats ``args`` according to specifications in ``fmt`` and writes the
-    output to the file.
-   */
-  template <typename... T> void print(format_string<T...> fmt, T&&... args) {
-    vformat_to(detail::buffer_appender<char>(*this), fmt,
-               fmt::make_format_args(args...));
-  }
-};
-
-/**
-  \rst
-  Opens a file for writing. Supported parameters passed in *params*:
-
-  * ``<integer>``: Flags passed to `open
-    <https://pubs.opengroup.org/onlinepubs/007904875/functions/open.html>`_
-    (``file::WRONLY | file::CREATE`` by default)
-  * ``buffer_size=<integer>``: Output buffer size
-
-  **Example**::
-
-    auto out = fmt::output_file("guide.txt");
-    out.print("Don't {}", "Panic");
-  \endrst
- */
-template <typename... T>
-inline ostream output_file(cstring_view path, T... params) {
-  return {path, detail::ostream_params(params...)};
-}
-#endif  // FMT_USE_FCNTL
-
-#ifdef FMT_LOCALE
-// A "C" numeric locale.
-class locale {
- private:
-#  ifdef _WIN32
-  using locale_t = _locale_t;
-
-  static void freelocale(locale_t loc) { _free_locale(loc); }
-
-  static double strtod_l(const char* nptr, char** endptr, _locale_t loc) {
-    return _strtod_l(nptr, endptr, loc);
-  }
-#  endif
-
-  locale_t locale_;
-
- public:
-  using type = locale_t;
-  locale(const locale&) = delete;
-  void operator=(const locale&) = delete;
-
-  locale() {
-#  ifndef _WIN32
-    locale_ = FMT_SYSTEM(newlocale(LC_NUMERIC_MASK, "C", nullptr));
-#  else
-    locale_ = _create_locale(LC_NUMERIC, "C");
-#  endif
-    if (!locale_) FMT_THROW(system_error(errno, "cannot create locale"));
-  }
-  ~locale() { freelocale(locale_); }
-
-  type get() const { return locale_; }
-
-  // Converts string to floating-point number and advances str past the end
-  // of the parsed input.
-  FMT_DEPRECATED double strtod(const char*& str) const {
-    char* end = nullptr;
-    double result = strtod_l(str, &end, locale_);
-    str = end;
-    return result;
-  }
-};
-using Locale FMT_DEPRECATED_ALIAS = locale;
-#endif  // FMT_LOCALE
-FMT_MODULE_EXPORT_END
-FMT_END_NAMESPACE
-
-#endif  // FMT_OS_H_
diff --git a/3rdparty/fmt/include/fmt/ostream.h b/3rdparty/fmt/include/fmt/ostream.h
deleted file mode 100644
index 3d716ece..00000000
--- a/3rdparty/fmt/include/fmt/ostream.h
+++ /dev/null
@@ -1,135 +0,0 @@
-// Formatting library for C++ - std::ostream support
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_OSTREAM_H_
-#define FMT_OSTREAM_H_
-
-#include <ostream>
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-
-template <typename OutputIt, typename Char> class basic_printf_context;
-
-namespace detail {
-
-// Checks if T has a user-defined operator<<.
-template <typename T, typename Char, typename Enable = void>
-class is_streamable {
- private:
-  template <typename U>
-  static auto test(int)
-      -> bool_constant<sizeof(std::declval<std::basic_ostream<Char>&>()
-                              << std::declval<U>()) != 0>;
-
-  template <typename> static auto test(...) -> std::false_type;
-
-  using result = decltype(test<T>(0));
-
- public:
-  is_streamable() = default;
-
-  static const bool value = result::value;
-};
-
-// Formatting of built-in types and arrays is intentionally disabled because
-// it's handled by standard (non-ostream) formatters.
-template <typename T, typename Char>
-struct is_streamable<
-    T, Char,
-    enable_if_t<
-        std::is_arithmetic<T>::value || std::is_array<T>::value ||
-        std::is_pointer<T>::value || std::is_same<T, char8_type>::value ||
-        std::is_same<T, std::basic_string<Char>>::value ||
-        std::is_same<T, std_string_view<Char>>::value ||
-        (std::is_convertible<T, int>::value && !std::is_enum<T>::value)>>
-    : std::false_type {};
-
-// Write the content of buf to os.
-// It is a separate function rather than a part of vprint to simplify testing.
-template <typename Char>
-void write_buffer(std::basic_ostream<Char>& os, buffer<Char>& buf) {
-  const Char* buf_data = buf.data();
-  using unsigned_streamsize = std::make_unsigned<std::streamsize>::type;
-  unsigned_streamsize size = buf.size();
-  unsigned_streamsize max_size = to_unsigned(max_value<std::streamsize>());
-  do {
-    unsigned_streamsize n = size <= max_size ? size : max_size;
-    os.write(buf_data, static_cast<std::streamsize>(n));
-    buf_data += n;
-    size -= n;
-  } while (size != 0);
-}
-
-template <typename Char, typename T>
-void format_value(buffer<Char>& buf, const T& value,
-                  locale_ref loc = locale_ref()) {
-  auto&& format_buf = formatbuf<std::basic_streambuf<Char>>(buf);
-  auto&& output = std::basic_ostream<Char>(&format_buf);
-#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
-  if (loc) output.imbue(loc.get<std::locale>());
-#endif
-  output << value;
-  output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
-  buf.try_resize(buf.size());
-}
-
-// Formats an object of type T that has an overloaded ostream operator<<.
-template <typename T, typename Char>
-struct fallback_formatter<T, Char, enable_if_t<is_streamable<T, Char>::value>>
-    : private formatter<basic_string_view<Char>, Char> {
-  using formatter<basic_string_view<Char>, Char>::parse;
-
-  template <typename OutputIt>
-  auto format(const T& value, basic_format_context<OutputIt, Char>& ctx)
-      -> OutputIt {
-    auto buffer = basic_memory_buffer<Char>();
-    format_value(buffer, value, ctx.locale());
-    return formatter<basic_string_view<Char>, Char>::format(
-        {buffer.data(), buffer.size()}, ctx);
-  }
-
-  // DEPRECATED!
-  template <typename OutputIt>
-  auto format(const T& value, basic_printf_context<OutputIt, Char>& ctx)
-      -> OutputIt {
-    auto buffer = basic_memory_buffer<Char>();
-    format_value(buffer, value, ctx.locale());
-    return std::copy(buffer.begin(), buffer.end(), ctx.out());
-  }
-};
-}  // namespace detail
-
-FMT_MODULE_EXPORT
-template <typename Char>
-void vprint(std::basic_ostream<Char>& os, basic_string_view<Char> format_str,
-            basic_format_args<buffer_context<type_identity_t<Char>>> args) {
-  auto buffer = basic_memory_buffer<Char>();
-  detail::vformat_to(buffer, format_str, args);
-  detail::write_buffer(os, buffer);
-}
-
-/**
-  \rst
-  Prints formatted data to the stream *os*.
-
-  **Example**::
-
-    fmt::print(cerr, "Don't {}!", "panic");
-  \endrst
- */
-FMT_MODULE_EXPORT
-template <typename S, typename... Args,
-          typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
-void print(std::basic_ostream<Char>& os, const S& format_str, Args&&... args) {
-  vprint(os, to_string_view(format_str),
-         fmt::make_args_checked<Args...>(format_str, args...));
-}
-FMT_END_NAMESPACE
-
-#endif  // FMT_OSTREAM_H_
diff --git a/3rdparty/fmt/include/fmt/printf.h b/3rdparty/fmt/include/fmt/printf.h
deleted file mode 100644
index 19d550f6..00000000
--- a/3rdparty/fmt/include/fmt/printf.h
+++ /dev/null
@@ -1,657 +0,0 @@
-// Formatting library for C++ - legacy printf implementation
-//
-// Copyright (c) 2012 - 2016, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_PRINTF_H_
-#define FMT_PRINTF_H_
-
-#include <algorithm>  // std::max
-#include <limits>     // std::numeric_limits
-#include <ostream>
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-FMT_MODULE_EXPORT_BEGIN
-
-template <typename T> struct printf_formatter { printf_formatter() = delete; };
-
-template <typename Char>
-class basic_printf_parse_context : public basic_format_parse_context<Char> {
-  using basic_format_parse_context<Char>::basic_format_parse_context;
-};
-
-template <typename OutputIt, typename Char> class basic_printf_context {
- private:
-  OutputIt out_;
-  basic_format_args<basic_printf_context> args_;
-
- public:
-  using char_type = Char;
-  using format_arg = basic_format_arg<basic_printf_context>;
-  using parse_context_type = basic_printf_parse_context<Char>;
-  template <typename T> using formatter_type = printf_formatter<T>;
-
-  /**
-    \rst
-    Constructs a ``printf_context`` object. References to the arguments are
-    stored in the context object so make sure they have appropriate lifetimes.
-    \endrst
-   */
-  basic_printf_context(OutputIt out,
-                       basic_format_args<basic_printf_context> args)
-      : out_(out), args_(args) {}
-
-  OutputIt out() { return out_; }
-  void advance_to(OutputIt it) { out_ = it; }
-
-  detail::locale_ref locale() { return {}; }
-
-  format_arg arg(int id) const { return args_.get(id); }
-
-  FMT_CONSTEXPR void on_error(const char* message) {
-    detail::error_handler().on_error(message);
-  }
-};
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
-// Checks if a value fits in int - used to avoid warnings about comparing
-// signed and unsigned integers.
-template <bool IsSigned> struct int_checker {
-  template <typename T> static bool fits_in_int(T value) {
-    unsigned max = max_value<int>();
-    return value <= max;
-  }
-  static bool fits_in_int(bool) { return true; }
-};
-
-template <> struct int_checker<true> {
-  template <typename T> static bool fits_in_int(T value) {
-    return value >= (std::numeric_limits<int>::min)() &&
-           value <= max_value<int>();
-  }
-  static bool fits_in_int(int) { return true; }
-};
-
-class printf_precision_handler {
- public:
-  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-  int operator()(T value) {
-    if (!int_checker<std::numeric_limits<T>::is_signed>::fits_in_int(value))
-      FMT_THROW(format_error("number is too big"));
-    return (std::max)(static_cast<int>(value), 0);
-  }
-
-  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
-  int operator()(T) {
-    FMT_THROW(format_error("precision is not integer"));
-    return 0;
-  }
-};
-
-// An argument visitor that returns true iff arg is a zero integer.
-class is_zero_int {
- public:
-  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-  bool operator()(T value) {
-    return value == 0;
-  }
-
-  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
-  bool operator()(T) {
-    return false;
-  }
-};
-
-template <typename T> struct make_unsigned_or_bool : std::make_unsigned<T> {};
-
-template <> struct make_unsigned_or_bool<bool> { using type = bool; };
-
-template <typename T, typename Context> class arg_converter {
- private:
-  using char_type = typename Context::char_type;
-
-  basic_format_arg<Context>& arg_;
-  char_type type_;
-
- public:
-  arg_converter(basic_format_arg<Context>& arg, char_type type)
-      : arg_(arg), type_(type) {}
-
-  void operator()(bool value) {
-    if (type_ != 's') operator()<bool>(value);
-  }
-
-  template <typename U, FMT_ENABLE_IF(std::is_integral<U>::value)>
-  void operator()(U value) {
-    bool is_signed = type_ == 'd' || type_ == 'i';
-    using target_type = conditional_t<std::is_same<T, void>::value, U, T>;
-    if (const_check(sizeof(target_type) <= sizeof(int))) {
-      // Extra casts are used to silence warnings.
-      if (is_signed) {
-        arg_ = detail::make_arg<Context>(
-            static_cast<int>(static_cast<target_type>(value)));
-      } else {
-        using unsigned_type = typename make_unsigned_or_bool<target_type>::type;
-        arg_ = detail::make_arg<Context>(
-            static_cast<unsigned>(static_cast<unsigned_type>(value)));
-      }
-    } else {
-      if (is_signed) {
-        // glibc's printf doesn't sign extend arguments of smaller types:
-        //   std::printf("%lld", -42);  // prints "4294967254"
-        // but we don't have to do the same because it's a UB.
-        arg_ = detail::make_arg<Context>(static_cast<long long>(value));
-      } else {
-        arg_ = detail::make_arg<Context>(
-            static_cast<typename make_unsigned_or_bool<U>::type>(value));
-      }
-    }
-  }
-
-  template <typename U, FMT_ENABLE_IF(!std::is_integral<U>::value)>
-  void operator()(U) {}  // No conversion needed for non-integral types.
-};
-
-// Converts an integer argument to T for printf, if T is an integral type.
-// If T is void, the argument is converted to corresponding signed or unsigned
-// type depending on the type specifier: 'd' and 'i' - signed, other -
-// unsigned).
-template <typename T, typename Context, typename Char>
-void convert_arg(basic_format_arg<Context>& arg, Char type) {
-  visit_format_arg(arg_converter<T, Context>(arg, type), arg);
-}
-
-// Converts an integer argument to char for printf.
-template <typename Context> class char_converter {
- private:
-  basic_format_arg<Context>& arg_;
-
- public:
-  explicit char_converter(basic_format_arg<Context>& arg) : arg_(arg) {}
-
-  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-  void operator()(T value) {
-    arg_ = detail::make_arg<Context>(
-        static_cast<typename Context::char_type>(value));
-  }
-
-  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
-  void operator()(T) {}  // No conversion needed for non-integral types.
-};
-
-// An argument visitor that return a pointer to a C string if argument is a
-// string or null otherwise.
-template <typename Char> struct get_cstring {
-  template <typename T> const Char* operator()(T) { return nullptr; }
-  const Char* operator()(const Char* s) { return s; }
-};
-
-// Checks if an argument is a valid printf width specifier and sets
-// left alignment if it is negative.
-template <typename Char> class printf_width_handler {
- private:
-  using format_specs = basic_format_specs<Char>;
-
-  format_specs& specs_;
-
- public:
-  explicit printf_width_handler(format_specs& specs) : specs_(specs) {}
-
-  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-  unsigned operator()(T value) {
-    auto width = static_cast<uint32_or_64_or_128_t<T>>(value);
-    if (detail::is_negative(value)) {
-      specs_.align = align::left;
-      width = 0 - width;
-    }
-    unsigned int_max = max_value<int>();
-    if (width > int_max) FMT_THROW(format_error("number is too big"));
-    return static_cast<unsigned>(width);
-  }
-
-  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
-  unsigned operator()(T) {
-    FMT_THROW(format_error("width is not integer"));
-    return 0;
-  }
-};
-
-// The ``printf`` argument formatter.
-template <typename OutputIt, typename Char>
-class printf_arg_formatter : public arg_formatter<Char> {
- private:
-  using base = arg_formatter<Char>;
-  using context_type = basic_printf_context<OutputIt, Char>;
-  using format_specs = basic_format_specs<Char>;
-
-  context_type& context_;
-
-  OutputIt write_null_pointer(bool is_string = false) {
-    auto s = this->specs;
-    s.type = presentation_type::none;
-    return write_bytes(this->out, is_string ? "(null)" : "(nil)", s);
-  }
-
- public:
-  printf_arg_formatter(OutputIt iter, format_specs& s, context_type& ctx)
-      : base{iter, s, locale_ref()}, context_(ctx) {}
-
-  OutputIt operator()(monostate value) { return base::operator()(value); }
-
-  template <typename T, FMT_ENABLE_IF(detail::is_integral<T>::value)>
-  OutputIt operator()(T value) {
-    // MSVC2013 fails to compile separate overloads for bool and Char so use
-    // std::is_same instead.
-    if (std::is_same<T, Char>::value) {
-      format_specs fmt_specs = this->specs;
-      if (fmt_specs.type != presentation_type::none &&
-          fmt_specs.type != presentation_type::chr) {
-        return (*this)(static_cast<int>(value));
-      }
-      fmt_specs.sign = sign::none;
-      fmt_specs.alt = false;
-      fmt_specs.fill[0] = ' ';  // Ignore '0' flag for char types.
-      // align::numeric needs to be overwritten here since the '0' flag is
-      // ignored for non-numeric types
-      if (fmt_specs.align == align::none || fmt_specs.align == align::numeric)
-        fmt_specs.align = align::right;
-      return write<Char>(this->out, static_cast<Char>(value), fmt_specs);
-    }
-    return base::operator()(value);
-  }
-
-  template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-  OutputIt operator()(T value) {
-    return base::operator()(value);
-  }
-
-  /** Formats a null-terminated C string. */
-  OutputIt operator()(const char* value) {
-    if (value) return base::operator()(value);
-    return write_null_pointer(this->specs.type != presentation_type::pointer);
-  }
-
-  /** Formats a null-terminated wide C string. */
-  OutputIt operator()(const wchar_t* value) {
-    if (value) return base::operator()(value);
-    return write_null_pointer(this->specs.type != presentation_type::pointer);
-  }
-
-  OutputIt operator()(basic_string_view<Char> value) {
-    return base::operator()(value);
-  }
-
-  /** Formats a pointer. */
-  OutputIt operator()(const void* value) {
-    return value ? base::operator()(value) : write_null_pointer();
-  }
-
-  /** Formats an argument of a custom (user-defined) type. */
-  OutputIt operator()(typename basic_format_arg<context_type>::handle handle) {
-    auto parse_ctx =
-        basic_printf_parse_context<Char>(basic_string_view<Char>());
-    handle.format(parse_ctx, context_);
-    return this->out;
-  }
-};
-
-template <typename Char>
-void parse_flags(basic_format_specs<Char>& specs, const Char*& it,
-                 const Char* end) {
-  for (; it != end; ++it) {
-    switch (*it) {
-    case '-':
-      specs.align = align::left;
-      break;
-    case '+':
-      specs.sign = sign::plus;
-      break;
-    case '0':
-      specs.fill[0] = '0';
-      break;
-    case ' ':
-      if (specs.sign != sign::plus) {
-        specs.sign = sign::space;
-      }
-      break;
-    case '#':
-      specs.alt = true;
-      break;
-    default:
-      return;
-    }
-  }
-}
-
-template <typename Char, typename GetArg>
-int parse_header(const Char*& it, const Char* end,
-                 basic_format_specs<Char>& specs, GetArg get_arg) {
-  int arg_index = -1;
-  Char c = *it;
-  if (c >= '0' && c <= '9') {
-    // Parse an argument index (if followed by '$') or a width possibly
-    // preceded with '0' flag(s).
-    int value = parse_nonnegative_int(it, end, -1);
-    if (it != end && *it == '$') {  // value is an argument index
-      ++it;
-      arg_index = value != -1 ? value : max_value<int>();
-    } else {
-      if (c == '0') specs.fill[0] = '0';
-      if (value != 0) {
-        // Nonzero value means that we parsed width and don't need to
-        // parse it or flags again, so return now.
-        if (value == -1) FMT_THROW(format_error("number is too big"));
-        specs.width = value;
-        return arg_index;
-      }
-    }
-  }
-  parse_flags(specs, it, end);
-  // Parse width.
-  if (it != end) {
-    if (*it >= '0' && *it <= '9') {
-      specs.width = parse_nonnegative_int(it, end, -1);
-      if (specs.width == -1) FMT_THROW(format_error("number is too big"));
-    } else if (*it == '*') {
-      ++it;
-      specs.width = static_cast<int>(visit_format_arg(
-          detail::printf_width_handler<Char>(specs), get_arg(-1)));
-    }
-  }
-  return arg_index;
-}
-
-template <typename Char, typename Context>
-void vprintf(buffer<Char>& buf, basic_string_view<Char> format,
-             basic_format_args<Context> args) {
-  using OutputIt = buffer_appender<Char>;
-  auto out = OutputIt(buf);
-  auto context = basic_printf_context<OutputIt, Char>(out, args);
-  auto parse_ctx = basic_printf_parse_context<Char>(format);
-
-  // Returns the argument with specified index or, if arg_index is -1, the next
-  // argument.
-  auto get_arg = [&](int arg_index) {
-    if (arg_index < 0)
-      arg_index = parse_ctx.next_arg_id();
-    else
-      parse_ctx.check_arg_id(--arg_index);
-    return detail::get_arg(context, arg_index);
-  };
-
-  const Char* start = parse_ctx.begin();
-  const Char* end = parse_ctx.end();
-  auto it = start;
-  while (it != end) {
-    if (!detail::find<false, Char>(it, end, '%', it)) {
-      it = end;  // detail::find leaves it == nullptr if it doesn't find '%'
-      break;
-    }
-    Char c = *it++;
-    if (it != end && *it == c) {
-      out = detail::write(
-          out, basic_string_view<Char>(start, detail::to_unsigned(it - start)));
-      start = ++it;
-      continue;
-    }
-    out = detail::write(out, basic_string_view<Char>(
-                                 start, detail::to_unsigned(it - 1 - start)));
-
-    basic_format_specs<Char> specs;
-    specs.align = align::right;
-
-    // Parse argument index, flags and width.
-    int arg_index = parse_header(it, end, specs, get_arg);
-    if (arg_index == 0) parse_ctx.on_error("argument not found");
-
-    // Parse precision.
-    if (it != end && *it == '.') {
-      ++it;
-      c = it != end ? *it : 0;
-      if ('0' <= c && c <= '9') {
-        specs.precision = parse_nonnegative_int(it, end, 0);
-      } else if (c == '*') {
-        ++it;
-        specs.precision = static_cast<int>(
-            visit_format_arg(detail::printf_precision_handler(), get_arg(-1)));
-      } else {
-        specs.precision = 0;
-      }
-    }
-
-    auto arg = get_arg(arg_index);
-    // For d, i, o, u, x, and X conversion specifiers, if a precision is
-    // specified, the '0' flag is ignored
-    if (specs.precision >= 0 && arg.is_integral())
-      specs.fill[0] =
-          ' ';  // Ignore '0' flag for non-numeric types or if '-' present.
-    if (specs.precision >= 0 && arg.type() == detail::type::cstring_type) {
-      auto str = visit_format_arg(detail::get_cstring<Char>(), arg);
-      auto str_end = str + specs.precision;
-      auto nul = std::find(str, str_end, Char());
-      arg = detail::make_arg<basic_printf_context<OutputIt, Char>>(
-          basic_string_view<Char>(
-              str, detail::to_unsigned(nul != str_end ? nul - str
-                                                      : specs.precision)));
-    }
-    if (specs.alt && visit_format_arg(detail::is_zero_int(), arg))
-      specs.alt = false;
-    if (specs.fill[0] == '0') {
-      if (arg.is_arithmetic() && specs.align != align::left)
-        specs.align = align::numeric;
-      else
-        specs.fill[0] = ' ';  // Ignore '0' flag for non-numeric types or if '-'
-                              // flag is also present.
-    }
-
-    // Parse length and convert the argument to the required type.
-    c = it != end ? *it++ : 0;
-    Char t = it != end ? *it : 0;
-    using detail::convert_arg;
-    switch (c) {
-    case 'h':
-      if (t == 'h') {
-        ++it;
-        t = it != end ? *it : 0;
-        convert_arg<signed char>(arg, t);
-      } else {
-        convert_arg<short>(arg, t);
-      }
-      break;
-    case 'l':
-      if (t == 'l') {
-        ++it;
-        t = it != end ? *it : 0;
-        convert_arg<long long>(arg, t);
-      } else {
-        convert_arg<long>(arg, t);
-      }
-      break;
-    case 'j':
-      convert_arg<intmax_t>(arg, t);
-      break;
-    case 'z':
-      convert_arg<size_t>(arg, t);
-      break;
-    case 't':
-      convert_arg<std::ptrdiff_t>(arg, t);
-      break;
-    case 'L':
-      // printf produces garbage when 'L' is omitted for long double, no
-      // need to do the same.
-      break;
-    default:
-      --it;
-      convert_arg<void>(arg, c);
-    }
-
-    // Parse type.
-    if (it == end) FMT_THROW(format_error("invalid format string"));
-    char type = static_cast<char>(*it++);
-    if (arg.is_integral()) {
-      // Normalize type.
-      switch (type) {
-      case 'i':
-      case 'u':
-        type = 'd';
-        break;
-      case 'c':
-        visit_format_arg(
-            detail::char_converter<basic_printf_context<OutputIt, Char>>(arg),
-            arg);
-        break;
-      }
-    }
-    specs.type = parse_presentation_type(type);
-    if (specs.type == presentation_type::none)
-      parse_ctx.on_error("invalid type specifier");
-
-    start = it;
-
-    // Format argument.
-    out = visit_format_arg(
-        detail::printf_arg_formatter<OutputIt, Char>(out, specs, context), arg);
-  }
-  detail::write(out, basic_string_view<Char>(start, to_unsigned(it - start)));
-}
-FMT_END_DETAIL_NAMESPACE
-
-template <typename Char>
-using basic_printf_context_t =
-    basic_printf_context<detail::buffer_appender<Char>, Char>;
-
-using printf_context = basic_printf_context_t<char>;
-using wprintf_context = basic_printf_context_t<wchar_t>;
-
-using printf_args = basic_format_args<printf_context>;
-using wprintf_args = basic_format_args<wprintf_context>;
-
-/**
-  \rst
-  Constructs an `~fmt::format_arg_store` object that contains references to
-  arguments and can be implicitly converted to `~fmt::printf_args`.
-  \endrst
- */
-template <typename... T>
-inline auto make_printf_args(const T&... args)
-    -> format_arg_store<printf_context, T...> {
-  return {args...};
-}
-
-/**
-  \rst
-  Constructs an `~fmt::format_arg_store` object that contains references to
-  arguments and can be implicitly converted to `~fmt::wprintf_args`.
-  \endrst
- */
-template <typename... T>
-inline auto make_wprintf_args(const T&... args)
-    -> format_arg_store<wprintf_context, T...> {
-  return {args...};
-}
-
-template <typename S, typename Char = char_t<S>>
-inline auto vsprintf(
-    const S& fmt,
-    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
-    -> std::basic_string<Char> {
-  basic_memory_buffer<Char> buffer;
-  vprintf(buffer, to_string_view(fmt), args);
-  return to_string(buffer);
-}
-
-/**
-  \rst
-  Formats arguments and returns the result as a string.
-
-  **Example**::
-
-    std::string message = fmt::sprintf("The answer is %d", 42);
-  \endrst
-*/
-template <typename S, typename... T,
-          typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
-inline auto sprintf(const S& fmt, const T&... args) -> std::basic_string<Char> {
-  using context = basic_printf_context_t<Char>;
-  return vsprintf(to_string_view(fmt), fmt::make_format_args<context>(args...));
-}
-
-template <typename S, typename Char = char_t<S>>
-inline auto vfprintf(
-    std::FILE* f, const S& fmt,
-    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
-    -> int {
-  basic_memory_buffer<Char> buffer;
-  vprintf(buffer, to_string_view(fmt), args);
-  size_t size = buffer.size();
-  return std::fwrite(buffer.data(), sizeof(Char), size, f) < size
-             ? -1
-             : static_cast<int>(size);
-}
-
-/**
-  \rst
-  Prints formatted data to the file *f*.
-
-  **Example**::
-
-    fmt::fprintf(stderr, "Don't %s!", "panic");
-  \endrst
- */
-template <typename S, typename... T, typename Char = char_t<S>>
-inline auto fprintf(std::FILE* f, const S& fmt, const T&... args) -> int {
-  using context = basic_printf_context_t<Char>;
-  return vfprintf(f, to_string_view(fmt),
-                  fmt::make_format_args<context>(args...));
-}
-
-template <typename S, typename Char = char_t<S>>
-inline auto vprintf(
-    const S& fmt,
-    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
-    -> int {
-  return vfprintf(stdout, to_string_view(fmt), args);
-}
-
-/**
-  \rst
-  Prints formatted data to ``stdout``.
-
-  **Example**::
-
-    fmt::printf("Elapsed time: %.2f seconds", 1.23);
-  \endrst
- */
-template <typename S, typename... T, FMT_ENABLE_IF(detail::is_string<S>::value)>
-inline auto printf(const S& fmt, const T&... args) -> int {
-  return vprintf(
-      to_string_view(fmt),
-      fmt::make_format_args<basic_printf_context_t<char_t<S>>>(args...));
-}
-
-template <typename S, typename Char = char_t<S>>
-FMT_DEPRECATED auto vfprintf(
-    std::basic_ostream<Char>& os, const S& fmt,
-    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
-    -> int {
-  basic_memory_buffer<Char> buffer;
-  vprintf(buffer, to_string_view(fmt), args);
-  os.write(buffer.data(), static_cast<std::streamsize>(buffer.size()));
-  return static_cast<int>(buffer.size());
-}
-template <typename S, typename... T, typename Char = char_t<S>>
-FMT_DEPRECATED auto fprintf(std::basic_ostream<Char>& os, const S& fmt,
-                            const T&... args) -> int {
-  return vfprintf(os, to_string_view(fmt),
-                  fmt::make_format_args<basic_printf_context_t<Char>>(args...));
-}
-
-FMT_MODULE_EXPORT_END
-FMT_END_NAMESPACE
-
-#endif  // FMT_PRINTF_H_
diff --git a/3rdparty/fmt/include/fmt/ranges.h b/3rdparty/fmt/include/fmt/ranges.h
deleted file mode 100644
index eb9fb8a9..00000000
--- a/3rdparty/fmt/include/fmt/ranges.h
+++ /dev/null
@@ -1,793 +0,0 @@
-// Formatting library for C++ - experimental range support
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-//
-// Copyright (c) 2018 - present, Remotion (Igor Schulz)
-// All Rights Reserved
-// {fmt} support for ranges, containers and types tuple interface.
-
-#ifndef FMT_RANGES_H_
-#define FMT_RANGES_H_
-
-#include <initializer_list>
-#include <tuple>
-#include <type_traits>
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-
-namespace detail {
-
-template <typename RangeT, typename OutputIterator>
-OutputIterator copy(const RangeT& range, OutputIterator out) {
-  for (auto it = range.begin(), end = range.end(); it != end; ++it)
-    *out++ = *it;
-  return out;
-}
-
-template <typename OutputIterator>
-OutputIterator copy(const char* str, OutputIterator out) {
-  while (*str) *out++ = *str++;
-  return out;
-}
-
-template <typename OutputIterator>
-OutputIterator copy(char ch, OutputIterator out) {
-  *out++ = ch;
-  return out;
-}
-
-template <typename OutputIterator>
-OutputIterator copy(wchar_t ch, OutputIterator out) {
-  *out++ = ch;
-  return out;
-}
-
-// Returns true if T has a std::string-like interface, like std::string_view.
-template <typename T> class is_std_string_like {
-  template <typename U>
-  static auto check(U* p)
-      -> decltype((void)p->find('a'), p->length(), (void)p->data(), int());
-  template <typename> static void check(...);
-
- public:
-  static FMT_CONSTEXPR_DECL const bool value =
-      is_string<T>::value ||
-      std::is_convertible<T, std_string_view<char>>::value ||
-      !std::is_void<decltype(check<T>(nullptr))>::value;
-};
-
-template <typename Char>
-struct is_std_string_like<fmt::basic_string_view<Char>> : std::true_type {};
-
-template <typename T> class is_map {
-  template <typename U> static auto check(U*) -> typename U::mapped_type;
-  template <typename> static void check(...);
-
- public:
-#ifdef FMT_FORMAT_MAP_AS_LIST
-  static FMT_CONSTEXPR_DECL const bool value = false;
-#else
-  static FMT_CONSTEXPR_DECL const bool value =
-      !std::is_void<decltype(check<T>(nullptr))>::value;
-#endif
-};
-
-template <typename T> class is_set {
-  template <typename U> static auto check(U*) -> typename U::key_type;
-  template <typename> static void check(...);
-
- public:
-#ifdef FMT_FORMAT_SET_AS_LIST
-  static FMT_CONSTEXPR_DECL const bool value = false;
-#else
-  static FMT_CONSTEXPR_DECL const bool value =
-      !std::is_void<decltype(check<T>(nullptr))>::value && !is_map<T>::value;
-#endif
-};
-
-template <typename... Ts> struct conditional_helper {};
-
-template <typename T, typename _ = void> struct is_range_ : std::false_type {};
-
-#if !FMT_MSC_VER || FMT_MSC_VER > 1800
-
-#  define FMT_DECLTYPE_RETURN(val)  \
-    ->decltype(val) { return val; } \
-    static_assert(                  \
-        true, "")  // This makes it so that a semicolon is required after the
-                   // macro, which helps clang-format handle the formatting.
-
-// C array overload
-template <typename T, std::size_t N>
-auto range_begin(const T (&arr)[N]) -> const T* {
-  return arr;
-}
-template <typename T, std::size_t N>
-auto range_end(const T (&arr)[N]) -> const T* {
-  return arr + N;
-}
-
-template <typename T, typename Enable = void>
-struct has_member_fn_begin_end_t : std::false_type {};
-
-template <typename T>
-struct has_member_fn_begin_end_t<T, void_t<decltype(std::declval<T>().begin()),
-                                           decltype(std::declval<T>().end())>>
-    : std::true_type {};
-
-// Member function overload
-template <typename T>
-auto range_begin(T&& rng) FMT_DECLTYPE_RETURN(static_cast<T&&>(rng).begin());
-template <typename T>
-auto range_end(T&& rng) FMT_DECLTYPE_RETURN(static_cast<T&&>(rng).end());
-
-// ADL overload. Only participates in overload resolution if member functions
-// are not found.
-template <typename T>
-auto range_begin(T&& rng)
-    -> enable_if_t<!has_member_fn_begin_end_t<T&&>::value,
-                   decltype(begin(static_cast<T&&>(rng)))> {
-  return begin(static_cast<T&&>(rng));
-}
-template <typename T>
-auto range_end(T&& rng) -> enable_if_t<!has_member_fn_begin_end_t<T&&>::value,
-                                       decltype(end(static_cast<T&&>(rng)))> {
-  return end(static_cast<T&&>(rng));
-}
-
-template <typename T, typename Enable = void>
-struct has_const_begin_end : std::false_type {};
-template <typename T, typename Enable = void>
-struct has_mutable_begin_end : std::false_type {};
-
-template <typename T>
-struct has_const_begin_end<
-    T,
-    void_t<
-        decltype(detail::range_begin(std::declval<const remove_cvref_t<T>&>())),
-        decltype(detail::range_end(std::declval<const remove_cvref_t<T>&>()))>>
-    : std::true_type {};
-
-template <typename T>
-struct has_mutable_begin_end<
-    T, void_t<decltype(detail::range_begin(std::declval<T>())),
-              decltype(detail::range_end(std::declval<T>())),
-              enable_if_t<std::is_copy_constructible<T>::value>>>
-    : std::true_type {};
-
-template <typename T>
-struct is_range_<T, void>
-    : std::integral_constant<bool, (has_const_begin_end<T>::value ||
-                                    has_mutable_begin_end<T>::value)> {};
-#  undef FMT_DECLTYPE_RETURN
-#endif
-
-// tuple_size and tuple_element check.
-template <typename T> class is_tuple_like_ {
-  template <typename U>
-  static auto check(U* p) -> decltype(std::tuple_size<U>::value, int());
-  template <typename> static void check(...);
-
- public:
-  static FMT_CONSTEXPR_DECL const bool value =
-      !std::is_void<decltype(check<T>(nullptr))>::value;
-};
-
-// Check for integer_sequence
-#if defined(__cpp_lib_integer_sequence) || FMT_MSC_VER >= 1900
-template <typename T, T... N>
-using integer_sequence = std::integer_sequence<T, N...>;
-template <size_t... N> using index_sequence = std::index_sequence<N...>;
-template <size_t N> using make_index_sequence = std::make_index_sequence<N>;
-#else
-template <typename T, T... N> struct integer_sequence {
-  using value_type = T;
-
-  static FMT_CONSTEXPR size_t size() { return sizeof...(N); }
-};
-
-template <size_t... N> using index_sequence = integer_sequence<size_t, N...>;
-
-template <typename T, size_t N, T... Ns>
-struct make_integer_sequence : make_integer_sequence<T, N - 1, N - 1, Ns...> {};
-template <typename T, T... Ns>
-struct make_integer_sequence<T, 0, Ns...> : integer_sequence<T, Ns...> {};
-
-template <size_t N>
-using make_index_sequence = make_integer_sequence<size_t, N>;
-#endif
-
-template <class Tuple, class F, size_t... Is>
-void for_each(index_sequence<Is...>, Tuple&& tup, F&& f) FMT_NOEXCEPT {
-  using std::get;
-  // using free function get<I>(T) now.
-  const int _[] = {0, ((void)f(get<Is>(tup)), 0)...};
-  (void)_;  // blocks warnings
-}
-
-template <class T>
-FMT_CONSTEXPR make_index_sequence<std::tuple_size<T>::value> get_indexes(
-    T const&) {
-  return {};
-}
-
-template <class Tuple, class F> void for_each(Tuple&& tup, F&& f) {
-  const auto indexes = get_indexes(tup);
-  for_each(indexes, std::forward<Tuple>(tup), std::forward<F>(f));
-}
-
-template <typename Range>
-using value_type =
-    remove_cvref_t<decltype(*detail::range_begin(std::declval<Range>()))>;
-
-template <typename OutputIt> OutputIt write_delimiter(OutputIt out) {
-  *out++ = ',';
-  *out++ = ' ';
-  return out;
-}
-
-struct singleton {
-  unsigned char upper;
-  unsigned char lower_count;
-};
-
-inline auto is_printable(uint16_t x, const singleton* singletons,
-                         size_t singletons_size,
-                         const unsigned char* singleton_lowers,
-                         const unsigned char* normal, size_t normal_size)
-    -> bool {
-  auto upper = x >> 8;
-  auto lower_start = 0;
-  for (size_t i = 0; i < singletons_size; ++i) {
-    auto s = singletons[i];
-    auto lower_end = lower_start + s.lower_count;
-    if (upper < s.upper) break;
-    if (upper == s.upper) {
-      for (auto j = lower_start; j < lower_end; ++j) {
-        if (singleton_lowers[j] == (x & 0xff)) return false;
-      }
-    }
-    lower_start = lower_end;
-  }
-
-  auto xsigned = static_cast<int>(x);
-  auto current = true;
-  for (size_t i = 0; i < normal_size; ++i) {
-    auto v = static_cast<int>(normal[i]);
-    auto len = (v & 0x80) != 0 ? (v & 0x7f) << 8 | normal[++i] : v;
-    xsigned -= len;
-    if (xsigned < 0) break;
-    current = !current;
-  }
-  return current;
-}
-
-// Returns true iff the code point cp is printable.
-// This code is generated by support/printable.py.
-inline auto is_printable(uint32_t cp) -> bool {
-  static constexpr singleton singletons0[] = {
-      {0x00, 1},  {0x03, 5},  {0x05, 6},  {0x06, 3},  {0x07, 6},  {0x08, 8},
-      {0x09, 17}, {0x0a, 28}, {0x0b, 25}, {0x0c, 20}, {0x0d, 16}, {0x0e, 13},
-      {0x0f, 4},  {0x10, 3},  {0x12, 18}, {0x13, 9},  {0x16, 1},  {0x17, 5},
-      {0x18, 2},  {0x19, 3},  {0x1a, 7},  {0x1c, 2},  {0x1d, 1},  {0x1f, 22},
-      {0x20, 3},  {0x2b, 3},  {0x2c, 2},  {0x2d, 11}, {0x2e, 1},  {0x30, 3},
-      {0x31, 2},  {0x32, 1},  {0xa7, 2},  {0xa9, 2},  {0xaa, 4},  {0xab, 8},
-      {0xfa, 2},  {0xfb, 5},  {0xfd, 4},  {0xfe, 3},  {0xff, 9},
-  };
-  static constexpr unsigned char singletons0_lower[] = {
-      0xad, 0x78, 0x79, 0x8b, 0x8d, 0xa2, 0x30, 0x57, 0x58, 0x8b, 0x8c, 0x90,
-      0x1c, 0x1d, 0xdd, 0x0e, 0x0f, 0x4b, 0x4c, 0xfb, 0xfc, 0x2e, 0x2f, 0x3f,
-      0x5c, 0x5d, 0x5f, 0xb5, 0xe2, 0x84, 0x8d, 0x8e, 0x91, 0x92, 0xa9, 0xb1,
-      0xba, 0xbb, 0xc5, 0xc6, 0xc9, 0xca, 0xde, 0xe4, 0xe5, 0xff, 0x00, 0x04,
-      0x11, 0x12, 0x29, 0x31, 0x34, 0x37, 0x3a, 0x3b, 0x3d, 0x49, 0x4a, 0x5d,
-      0x84, 0x8e, 0x92, 0xa9, 0xb1, 0xb4, 0xba, 0xbb, 0xc6, 0xca, 0xce, 0xcf,
-      0xe4, 0xe5, 0x00, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a,
-      0x3b, 0x45, 0x46, 0x49, 0x4a, 0x5e, 0x64, 0x65, 0x84, 0x91, 0x9b, 0x9d,
-      0xc9, 0xce, 0xcf, 0x0d, 0x11, 0x29, 0x45, 0x49, 0x57, 0x64, 0x65, 0x8d,
-      0x91, 0xa9, 0xb4, 0xba, 0xbb, 0xc5, 0xc9, 0xdf, 0xe4, 0xe5, 0xf0, 0x0d,
-      0x11, 0x45, 0x49, 0x64, 0x65, 0x80, 0x84, 0xb2, 0xbc, 0xbe, 0xbf, 0xd5,
-      0xd7, 0xf0, 0xf1, 0x83, 0x85, 0x8b, 0xa4, 0xa6, 0xbe, 0xbf, 0xc5, 0xc7,
-      0xce, 0xcf, 0xda, 0xdb, 0x48, 0x98, 0xbd, 0xcd, 0xc6, 0xce, 0xcf, 0x49,
-      0x4e, 0x4f, 0x57, 0x59, 0x5e, 0x5f, 0x89, 0x8e, 0x8f, 0xb1, 0xb6, 0xb7,
-      0xbf, 0xc1, 0xc6, 0xc7, 0xd7, 0x11, 0x16, 0x17, 0x5b, 0x5c, 0xf6, 0xf7,
-      0xfe, 0xff, 0x80, 0x0d, 0x6d, 0x71, 0xde, 0xdf, 0x0e, 0x0f, 0x1f, 0x6e,
-      0x6f, 0x1c, 0x1d, 0x5f, 0x7d, 0x7e, 0xae, 0xaf, 0xbb, 0xbc, 0xfa, 0x16,
-      0x17, 0x1e, 0x1f, 0x46, 0x47, 0x4e, 0x4f, 0x58, 0x5a, 0x5c, 0x5e, 0x7e,
-      0x7f, 0xb5, 0xc5, 0xd4, 0xd5, 0xdc, 0xf0, 0xf1, 0xf5, 0x72, 0x73, 0x8f,
-      0x74, 0x75, 0x96, 0x2f, 0x5f, 0x26, 0x2e, 0x2f, 0xa7, 0xaf, 0xb7, 0xbf,
-      0xc7, 0xcf, 0xd7, 0xdf, 0x9a, 0x40, 0x97, 0x98, 0x30, 0x8f, 0x1f, 0xc0,
-      0xc1, 0xce, 0xff, 0x4e, 0x4f, 0x5a, 0x5b, 0x07, 0x08, 0x0f, 0x10, 0x27,
-      0x2f, 0xee, 0xef, 0x6e, 0x6f, 0x37, 0x3d, 0x3f, 0x42, 0x45, 0x90, 0x91,
-      0xfe, 0xff, 0x53, 0x67, 0x75, 0xc8, 0xc9, 0xd0, 0xd1, 0xd8, 0xd9, 0xe7,
-      0xfe, 0xff,
-  };
-  static constexpr singleton singletons1[] = {
-      {0x00, 6},  {0x01, 1}, {0x03, 1},  {0x04, 2}, {0x08, 8},  {0x09, 2},
-      {0x0a, 5},  {0x0b, 2}, {0x0e, 4},  {0x10, 1}, {0x11, 2},  {0x12, 5},
-      {0x13, 17}, {0x14, 1}, {0x15, 2},  {0x17, 2}, {0x19, 13}, {0x1c, 5},
-      {0x1d, 8},  {0x24, 1}, {0x6a, 3},  {0x6b, 2}, {0xbc, 2},  {0xd1, 2},
-      {0xd4, 12}, {0xd5, 9}, {0xd6, 2},  {0xd7, 2}, {0xda, 1},  {0xe0, 5},
-      {0xe1, 2},  {0xe8, 2}, {0xee, 32}, {0xf0, 4}, {0xf8, 2},  {0xf9, 2},
-      {0xfa, 2},  {0xfb, 1},
-  };
-  static constexpr unsigned char singletons1_lower[] = {
-      0x0c, 0x27, 0x3b, 0x3e, 0x4e, 0x4f, 0x8f, 0x9e, 0x9e, 0x9f, 0x06, 0x07,
-      0x09, 0x36, 0x3d, 0x3e, 0x56, 0xf3, 0xd0, 0xd1, 0x04, 0x14, 0x18, 0x36,
-      0x37, 0x56, 0x57, 0x7f, 0xaa, 0xae, 0xaf, 0xbd, 0x35, 0xe0, 0x12, 0x87,
-      0x89, 0x8e, 0x9e, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a,
-      0x45, 0x46, 0x49, 0x4a, 0x4e, 0x4f, 0x64, 0x65, 0x5c, 0xb6, 0xb7, 0x1b,
-      0x1c, 0x07, 0x08, 0x0a, 0x0b, 0x14, 0x17, 0x36, 0x39, 0x3a, 0xa8, 0xa9,
-      0xd8, 0xd9, 0x09, 0x37, 0x90, 0x91, 0xa8, 0x07, 0x0a, 0x3b, 0x3e, 0x66,
-      0x69, 0x8f, 0x92, 0x6f, 0x5f, 0xee, 0xef, 0x5a, 0x62, 0x9a, 0x9b, 0x27,
-      0x28, 0x55, 0x9d, 0xa0, 0xa1, 0xa3, 0xa4, 0xa7, 0xa8, 0xad, 0xba, 0xbc,
-      0xc4, 0x06, 0x0b, 0x0c, 0x15, 0x1d, 0x3a, 0x3f, 0x45, 0x51, 0xa6, 0xa7,
-      0xcc, 0xcd, 0xa0, 0x07, 0x19, 0x1a, 0x22, 0x25, 0x3e, 0x3f, 0xc5, 0xc6,
-      0x04, 0x20, 0x23, 0x25, 0x26, 0x28, 0x33, 0x38, 0x3a, 0x48, 0x4a, 0x4c,
-      0x50, 0x53, 0x55, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x63, 0x65, 0x66,
-      0x6b, 0x73, 0x78, 0x7d, 0x7f, 0x8a, 0xa4, 0xaa, 0xaf, 0xb0, 0xc0, 0xd0,
-      0xae, 0xaf, 0x79, 0xcc, 0x6e, 0x6f, 0x93,
-  };
-  static constexpr unsigned char normal0[] = {
-      0x00, 0x20, 0x5f, 0x22, 0x82, 0xdf, 0x04, 0x82, 0x44, 0x08, 0x1b, 0x04,
-      0x06, 0x11, 0x81, 0xac, 0x0e, 0x80, 0xab, 0x35, 0x28, 0x0b, 0x80, 0xe0,
-      0x03, 0x19, 0x08, 0x01, 0x04, 0x2f, 0x04, 0x34, 0x04, 0x07, 0x03, 0x01,
-      0x07, 0x06, 0x07, 0x11, 0x0a, 0x50, 0x0f, 0x12, 0x07, 0x55, 0x07, 0x03,
-      0x04, 0x1c, 0x0a, 0x09, 0x03, 0x08, 0x03, 0x07, 0x03, 0x02, 0x03, 0x03,
-      0x03, 0x0c, 0x04, 0x05, 0x03, 0x0b, 0x06, 0x01, 0x0e, 0x15, 0x05, 0x3a,
-      0x03, 0x11, 0x07, 0x06, 0x05, 0x10, 0x07, 0x57, 0x07, 0x02, 0x07, 0x15,
-      0x0d, 0x50, 0x04, 0x43, 0x03, 0x2d, 0x03, 0x01, 0x04, 0x11, 0x06, 0x0f,
-      0x0c, 0x3a, 0x04, 0x1d, 0x25, 0x5f, 0x20, 0x6d, 0x04, 0x6a, 0x25, 0x80,
-      0xc8, 0x05, 0x82, 0xb0, 0x03, 0x1a, 0x06, 0x82, 0xfd, 0x03, 0x59, 0x07,
-      0x15, 0x0b, 0x17, 0x09, 0x14, 0x0c, 0x14, 0x0c, 0x6a, 0x06, 0x0a, 0x06,
-      0x1a, 0x06, 0x59, 0x07, 0x2b, 0x05, 0x46, 0x0a, 0x2c, 0x04, 0x0c, 0x04,
-      0x01, 0x03, 0x31, 0x0b, 0x2c, 0x04, 0x1a, 0x06, 0x0b, 0x03, 0x80, 0xac,
-      0x06, 0x0a, 0x06, 0x21, 0x3f, 0x4c, 0x04, 0x2d, 0x03, 0x74, 0x08, 0x3c,
-      0x03, 0x0f, 0x03, 0x3c, 0x07, 0x38, 0x08, 0x2b, 0x05, 0x82, 0xff, 0x11,
-      0x18, 0x08, 0x2f, 0x11, 0x2d, 0x03, 0x20, 0x10, 0x21, 0x0f, 0x80, 0x8c,
-      0x04, 0x82, 0x97, 0x19, 0x0b, 0x15, 0x88, 0x94, 0x05, 0x2f, 0x05, 0x3b,
-      0x07, 0x02, 0x0e, 0x18, 0x09, 0x80, 0xb3, 0x2d, 0x74, 0x0c, 0x80, 0xd6,
-      0x1a, 0x0c, 0x05, 0x80, 0xff, 0x05, 0x80, 0xdf, 0x0c, 0xee, 0x0d, 0x03,
-      0x84, 0x8d, 0x03, 0x37, 0x09, 0x81, 0x5c, 0x14, 0x80, 0xb8, 0x08, 0x80,
-      0xcb, 0x2a, 0x38, 0x03, 0x0a, 0x06, 0x38, 0x08, 0x46, 0x08, 0x0c, 0x06,
-      0x74, 0x0b, 0x1e, 0x03, 0x5a, 0x04, 0x59, 0x09, 0x80, 0x83, 0x18, 0x1c,
-      0x0a, 0x16, 0x09, 0x4c, 0x04, 0x80, 0x8a, 0x06, 0xab, 0xa4, 0x0c, 0x17,
-      0x04, 0x31, 0xa1, 0x04, 0x81, 0xda, 0x26, 0x07, 0x0c, 0x05, 0x05, 0x80,
-      0xa5, 0x11, 0x81, 0x6d, 0x10, 0x78, 0x28, 0x2a, 0x06, 0x4c, 0x04, 0x80,
-      0x8d, 0x04, 0x80, 0xbe, 0x03, 0x1b, 0x03, 0x0f, 0x0d,
-  };
-  static constexpr unsigned char normal1[] = {
-      0x5e, 0x22, 0x7b, 0x05, 0x03, 0x04, 0x2d, 0x03, 0x66, 0x03, 0x01, 0x2f,
-      0x2e, 0x80, 0x82, 0x1d, 0x03, 0x31, 0x0f, 0x1c, 0x04, 0x24, 0x09, 0x1e,
-      0x05, 0x2b, 0x05, 0x44, 0x04, 0x0e, 0x2a, 0x80, 0xaa, 0x06, 0x24, 0x04,
-      0x24, 0x04, 0x28, 0x08, 0x34, 0x0b, 0x01, 0x80, 0x90, 0x81, 0x37, 0x09,
-      0x16, 0x0a, 0x08, 0x80, 0x98, 0x39, 0x03, 0x63, 0x08, 0x09, 0x30, 0x16,
-      0x05, 0x21, 0x03, 0x1b, 0x05, 0x01, 0x40, 0x38, 0x04, 0x4b, 0x05, 0x2f,
-      0x04, 0x0a, 0x07, 0x09, 0x07, 0x40, 0x20, 0x27, 0x04, 0x0c, 0x09, 0x36,
-      0x03, 0x3a, 0x05, 0x1a, 0x07, 0x04, 0x0c, 0x07, 0x50, 0x49, 0x37, 0x33,
-      0x0d, 0x33, 0x07, 0x2e, 0x08, 0x0a, 0x81, 0x26, 0x52, 0x4e, 0x28, 0x08,
-      0x2a, 0x56, 0x1c, 0x14, 0x17, 0x09, 0x4e, 0x04, 0x1e, 0x0f, 0x43, 0x0e,
-      0x19, 0x07, 0x0a, 0x06, 0x48, 0x08, 0x27, 0x09, 0x75, 0x0b, 0x3f, 0x41,
-      0x2a, 0x06, 0x3b, 0x05, 0x0a, 0x06, 0x51, 0x06, 0x01, 0x05, 0x10, 0x03,
-      0x05, 0x80, 0x8b, 0x62, 0x1e, 0x48, 0x08, 0x0a, 0x80, 0xa6, 0x5e, 0x22,
-      0x45, 0x0b, 0x0a, 0x06, 0x0d, 0x13, 0x39, 0x07, 0x0a, 0x36, 0x2c, 0x04,
-      0x10, 0x80, 0xc0, 0x3c, 0x64, 0x53, 0x0c, 0x48, 0x09, 0x0a, 0x46, 0x45,
-      0x1b, 0x48, 0x08, 0x53, 0x1d, 0x39, 0x81, 0x07, 0x46, 0x0a, 0x1d, 0x03,
-      0x47, 0x49, 0x37, 0x03, 0x0e, 0x08, 0x0a, 0x06, 0x39, 0x07, 0x0a, 0x81,
-      0x36, 0x19, 0x80, 0xb7, 0x01, 0x0f, 0x32, 0x0d, 0x83, 0x9b, 0x66, 0x75,
-      0x0b, 0x80, 0xc4, 0x8a, 0xbc, 0x84, 0x2f, 0x8f, 0xd1, 0x82, 0x47, 0xa1,
-      0xb9, 0x82, 0x39, 0x07, 0x2a, 0x04, 0x02, 0x60, 0x26, 0x0a, 0x46, 0x0a,
-      0x28, 0x05, 0x13, 0x82, 0xb0, 0x5b, 0x65, 0x4b, 0x04, 0x39, 0x07, 0x11,
-      0x40, 0x05, 0x0b, 0x02, 0x0e, 0x97, 0xf8, 0x08, 0x84, 0xd6, 0x2a, 0x09,
-      0xa2, 0xf7, 0x81, 0x1f, 0x31, 0x03, 0x11, 0x04, 0x08, 0x81, 0x8c, 0x89,
-      0x04, 0x6b, 0x05, 0x0d, 0x03, 0x09, 0x07, 0x10, 0x93, 0x60, 0x80, 0xf6,
-      0x0a, 0x73, 0x08, 0x6e, 0x17, 0x46, 0x80, 0x9a, 0x14, 0x0c, 0x57, 0x09,
-      0x19, 0x80, 0x87, 0x81, 0x47, 0x03, 0x85, 0x42, 0x0f, 0x15, 0x85, 0x50,
-      0x2b, 0x80, 0xd5, 0x2d, 0x03, 0x1a, 0x04, 0x02, 0x81, 0x70, 0x3a, 0x05,
-      0x01, 0x85, 0x00, 0x80, 0xd7, 0x29, 0x4c, 0x04, 0x0a, 0x04, 0x02, 0x83,
-      0x11, 0x44, 0x4c, 0x3d, 0x80, 0xc2, 0x3c, 0x06, 0x01, 0x04, 0x55, 0x05,
-      0x1b, 0x34, 0x02, 0x81, 0x0e, 0x2c, 0x04, 0x64, 0x0c, 0x56, 0x0a, 0x80,
-      0xae, 0x38, 0x1d, 0x0d, 0x2c, 0x04, 0x09, 0x07, 0x02, 0x0e, 0x06, 0x80,
-      0x9a, 0x83, 0xd8, 0x08, 0x0d, 0x03, 0x0d, 0x03, 0x74, 0x0c, 0x59, 0x07,
-      0x0c, 0x14, 0x0c, 0x04, 0x38, 0x08, 0x0a, 0x06, 0x28, 0x08, 0x22, 0x4e,
-      0x81, 0x54, 0x0c, 0x15, 0x03, 0x03, 0x05, 0x07, 0x09, 0x19, 0x07, 0x07,
-      0x09, 0x03, 0x0d, 0x07, 0x29, 0x80, 0xcb, 0x25, 0x0a, 0x84, 0x06,
-  };
-  auto lower = static_cast<uint16_t>(cp);
-  if (cp < 0x10000) {
-    return is_printable(lower, singletons0,
-                        sizeof(singletons0) / sizeof(*singletons0),
-                        singletons0_lower, normal0, sizeof(normal0));
-  }
-  if (cp < 0x20000) {
-    return is_printable(lower, singletons1,
-                        sizeof(singletons1) / sizeof(*singletons1),
-                        singletons1_lower, normal1, sizeof(normal1));
-  }
-  if (0x2a6de <= cp && cp < 0x2a700) return false;
-  if (0x2b735 <= cp && cp < 0x2b740) return false;
-  if (0x2b81e <= cp && cp < 0x2b820) return false;
-  if (0x2cea2 <= cp && cp < 0x2ceb0) return false;
-  if (0x2ebe1 <= cp && cp < 0x2f800) return false;
-  if (0x2fa1e <= cp && cp < 0x30000) return false;
-  if (0x3134b <= cp && cp < 0xe0100) return false;
-  if (0xe01f0 <= cp && cp < 0x110000) return false;
-  return cp < 0x110000;
-}
-
-inline auto needs_escape(uint32_t cp) -> bool {
-  return cp < 0x20 || cp == 0x7f || cp == '"' || cp == '\\' ||
-         !is_printable(cp);
-}
-
-template <typename Char> struct find_escape_result {
-  const Char* begin;
-  const Char* end;
-  uint32_t cp;
-};
-
-template <typename Char>
-auto find_escape(const Char* begin, const Char* end)
-    -> find_escape_result<Char> {
-  for (; begin != end; ++begin) {
-    auto cp = static_cast<typename std::make_unsigned<Char>::type>(*begin);
-    if (sizeof(Char) == 1 && cp >= 0x80) continue;
-    if (needs_escape(cp)) return {begin, begin + 1, cp};
-  }
-  return {begin, nullptr, 0};
-}
-
-inline auto find_escape(const char* begin, const char* end)
-    -> find_escape_result<char> {
-  if (!is_utf8()) return find_escape<char>(begin, end);
-  auto result = find_escape_result<char>{end, nullptr, 0};
-  for_each_codepoint(string_view(begin, to_unsigned(end - begin)),
-                     [&](uint32_t cp, string_view sv) {
-                       if (needs_escape(cp)) {
-                         result = {sv.begin(), sv.end(), cp};
-                         return false;
-                       }
-                       return true;
-                     });
-  return result;
-}
-
-template <typename Char, typename OutputIt>
-auto write_range_entry(OutputIt out, basic_string_view<Char> str) -> OutputIt {
-  *out++ = '"';
-  auto begin = str.begin(), end = str.end();
-  do {
-    auto escape = find_escape(begin, end);
-    out = copy_str<Char>(begin, escape.begin, out);
-    begin = escape.end;
-    if (!begin) break;
-    auto c = static_cast<Char>(escape.cp);
-    switch (escape.cp) {
-    case '\n':
-      *out++ = '\\';
-      c = 'n';
-      break;
-    case '\r':
-      *out++ = '\\';
-      c = 'r';
-      break;
-    case '\t':
-      *out++ = '\\';
-      c = 't';
-      break;
-    case '"':
-      FMT_FALLTHROUGH;
-    case '\\':
-      *out++ = '\\';
-      break;
-    default:
-      if (is_utf8()) {
-        if (escape.cp < 0x100) {
-          out = format_to(out, "\\x{:02x}", escape.cp);
-          continue;
-        }
-        if (escape.cp < 0x10000) {
-          out = format_to(out, "\\u{:04x}", escape.cp);
-          continue;
-        }
-        if (escape.cp < 0x110000) {
-          out = format_to(out, "\\U{:08x}", escape.cp);
-          continue;
-        }
-      }
-      for (Char escape_char : basic_string_view<Char>(
-               escape.begin, to_unsigned(escape.end - escape.begin))) {
-        out = format_to(
-            out, "\\x{:02x}",
-            static_cast<typename std::make_unsigned<Char>::type>(escape_char));
-      }
-      continue;
-    }
-    *out++ = c;
-  } while (begin != end);
-  *out++ = '"';
-  return out;
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(std::is_convertible<T, std_string_view<char>>::value)>
-inline auto write_range_entry(OutputIt out, const T& str) -> OutputIt {
-  auto sv = std_string_view<Char>(str);
-  return write_range_entry<Char>(out, basic_string_view<Char>(sv));
-}
-
-template <typename Char, typename OutputIt, typename Arg,
-          FMT_ENABLE_IF(std::is_same<Arg, Char>::value)>
-OutputIt write_range_entry(OutputIt out, const Arg v) {
-  *out++ = '\'';
-  *out++ = v;
-  *out++ = '\'';
-  return out;
-}
-
-template <
-    typename Char, typename OutputIt, typename Arg,
-    FMT_ENABLE_IF(!is_std_string_like<typename std::decay<Arg>::type>::value &&
-                  !std::is_same<Arg, Char>::value)>
-OutputIt write_range_entry(OutputIt out, const Arg& v) {
-  return write<Char>(out, v);
-}
-
-}  // namespace detail
-
-template <typename T> struct is_tuple_like {
-  static FMT_CONSTEXPR_DECL const bool value =
-      detail::is_tuple_like_<T>::value && !detail::is_range_<T>::value;
-};
-
-template <typename TupleT, typename Char>
-struct formatter<TupleT, Char, enable_if_t<fmt::is_tuple_like<TupleT>::value>> {
- private:
-  // C++11 generic lambda for format().
-  template <typename FormatContext> struct format_each {
-    template <typename T> void operator()(const T& v) {
-      if (i > 0) out = detail::write_delimiter(out);
-      out = detail::write_range_entry<Char>(out, v);
-      ++i;
-    }
-    int i;
-    typename FormatContext::iterator& out;
-  };
-
- public:
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  template <typename FormatContext = format_context>
-  auto format(const TupleT& values, FormatContext& ctx) -> decltype(ctx.out()) {
-    auto out = ctx.out();
-    *out++ = '(';
-    detail::for_each(values, format_each<FormatContext>{0, out});
-    *out++ = ')';
-    return out;
-  }
-};
-
-template <typename T, typename Char> struct is_range {
-  static FMT_CONSTEXPR_DECL const bool value =
-      detail::is_range_<T>::value && !detail::is_std_string_like<T>::value &&
-      !detail::is_map<T>::value &&
-      !std::is_convertible<T, std::basic_string<Char>>::value &&
-      !std::is_constructible<detail::std_string_view<Char>, T>::value;
-};
-
-template <typename T, typename Char>
-struct formatter<
-    T, Char,
-    enable_if_t<
-        fmt::is_range<T, Char>::value
-// Workaround a bug in MSVC 2019 and earlier.
-#if !FMT_MSC_VER
-        && (is_formattable<detail::value_type<T>, Char>::value ||
-            detail::has_fallback_formatter<detail::value_type<T>, Char>::value)
-#endif
-        >> {
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  template <
-      typename FormatContext, typename U,
-      FMT_ENABLE_IF(
-          std::is_same<U, conditional_t<detail::has_const_begin_end<T>::value,
-                                        const T, T>>::value)>
-  auto format(U& range, FormatContext& ctx) -> decltype(ctx.out()) {
-#ifdef FMT_DEPRECATED_BRACED_RANGES
-    Char prefix = '{';
-    Char postfix = '}';
-#else
-    Char prefix = detail::is_set<T>::value ? '{' : '[';
-    Char postfix = detail::is_set<T>::value ? '}' : ']';
-#endif
-    auto out = ctx.out();
-    *out++ = prefix;
-    int i = 0;
-    auto it = std::begin(range);
-    auto end = std::end(range);
-    for (; it != end; ++it) {
-      if (i > 0) out = detail::write_delimiter(out);
-      out = detail::write_range_entry<Char>(out, *it);
-      ++i;
-    }
-    *out++ = postfix;
-    return out;
-  }
-};
-
-template <typename T, typename Char>
-struct formatter<
-    T, Char,
-    enable_if_t<
-        detail::is_map<T>::value
-// Workaround a bug in MSVC 2019 and earlier.
-#if !FMT_MSC_VER
-        && (is_formattable<detail::value_type<T>, Char>::value ||
-            detail::has_fallback_formatter<detail::value_type<T>, Char>::value)
-#endif
-        >> {
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  template <
-      typename FormatContext, typename U,
-      FMT_ENABLE_IF(
-          std::is_same<U, conditional_t<detail::has_const_begin_end<T>::value,
-                                        const T, T>>::value)>
-  auto format(U& map, FormatContext& ctx) -> decltype(ctx.out()) {
-    auto out = ctx.out();
-    *out++ = '{';
-    int i = 0;
-    for (const auto& item : map) {
-      if (i > 0) out = detail::write_delimiter(out);
-      out = detail::write_range_entry<Char>(out, item.first);
-      *out++ = ':';
-      *out++ = ' ';
-      out = detail::write_range_entry<Char>(out, item.second);
-      ++i;
-    }
-    *out++ = '}';
-    return out;
-  }
-};
-
-template <typename Char, typename... T> struct tuple_join_view : detail::view {
-  const std::tuple<T...>& tuple;
-  basic_string_view<Char> sep;
-
-  tuple_join_view(const std::tuple<T...>& t, basic_string_view<Char> s)
-      : tuple(t), sep{s} {}
-};
-
-template <typename Char, typename... T>
-using tuple_arg_join = tuple_join_view<Char, T...>;
-
-// Define FMT_TUPLE_JOIN_SPECIFIERS to enable experimental format specifiers
-// support in tuple_join. It is disabled by default because of issues with
-// the dynamic width and precision.
-#ifndef FMT_TUPLE_JOIN_SPECIFIERS
-#  define FMT_TUPLE_JOIN_SPECIFIERS 0
-#endif
-
-template <typename Char, typename... T>
-struct formatter<tuple_join_view<Char, T...>, Char> {
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return do_parse(ctx, std::integral_constant<size_t, sizeof...(T)>());
-  }
-
-  template <typename FormatContext>
-  auto format(const tuple_join_view<Char, T...>& value,
-              FormatContext& ctx) const -> typename FormatContext::iterator {
-    return do_format(value, ctx,
-                     std::integral_constant<size_t, sizeof...(T)>());
-  }
-
- private:
-  std::tuple<formatter<typename std::decay<T>::type, Char>...> formatters_;
-
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto do_parse(ParseContext& ctx,
-                              std::integral_constant<size_t, 0>)
-      -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  template <typename ParseContext, size_t N>
-  FMT_CONSTEXPR auto do_parse(ParseContext& ctx,
-                              std::integral_constant<size_t, N>)
-      -> decltype(ctx.begin()) {
-    auto end = ctx.begin();
-#if FMT_TUPLE_JOIN_SPECIFIERS
-    end = std::get<sizeof...(T) - N>(formatters_).parse(ctx);
-    if (N > 1) {
-      auto end1 = do_parse(ctx, std::integral_constant<size_t, N - 1>());
-      if (end != end1)
-        FMT_THROW(format_error("incompatible format specs for tuple elements"));
-    }
-#endif
-    return end;
-  }
-
-  template <typename FormatContext>
-  auto do_format(const tuple_join_view<Char, T...>&, FormatContext& ctx,
-                 std::integral_constant<size_t, 0>) const ->
-      typename FormatContext::iterator {
-    return ctx.out();
-  }
-
-  template <typename FormatContext, size_t N>
-  auto do_format(const tuple_join_view<Char, T...>& value, FormatContext& ctx,
-                 std::integral_constant<size_t, N>) const ->
-      typename FormatContext::iterator {
-    auto out = std::get<sizeof...(T) - N>(formatters_)
-                   .format(std::get<sizeof...(T) - N>(value.tuple), ctx);
-    if (N > 1) {
-      out = std::copy(value.sep.begin(), value.sep.end(), out);
-      ctx.advance_to(out);
-      return do_format(value, ctx, std::integral_constant<size_t, N - 1>());
-    }
-    return out;
-  }
-};
-
-FMT_MODULE_EXPORT_BEGIN
-
-/**
-  \rst
-  Returns an object that formats `tuple` with elements separated by `sep`.
-
-  **Example**::
-
-    std::tuple<int, char> t = {1, 'a'};
-    fmt::print("{}", fmt::join(t, ", "));
-    // Output: "1, a"
-  \endrst
- */
-template <typename... T>
-FMT_CONSTEXPR auto join(const std::tuple<T...>& tuple, string_view sep)
-    -> tuple_join_view<char, T...> {
-  return {tuple, sep};
-}
-
-template <typename... T>
-FMT_CONSTEXPR auto join(const std::tuple<T...>& tuple,
-                        basic_string_view<wchar_t> sep)
-    -> tuple_join_view<wchar_t, T...> {
-  return {tuple, sep};
-}
-
-/**
-  \rst
-  Returns an object that formats `initializer_list` with elements separated by
-  `sep`.
-
-  **Example**::
-
-    fmt::print("{}", fmt::join({1, 2, 3}, ", "));
-    // Output: "1, 2, 3"
-  \endrst
- */
-template <typename T>
-auto join(std::initializer_list<T> list, string_view sep)
-    -> join_view<const T*, const T*> {
-  return join(std::begin(list), std::end(list), sep);
-}
-
-FMT_MODULE_EXPORT_END
-FMT_END_NAMESPACE
-
-#endif  // FMT_RANGES_H_
diff --git a/3rdparty/fmt/include/fmt/xchar.h b/3rdparty/fmt/include/fmt/xchar.h
deleted file mode 100644
index 55825077..00000000
--- a/3rdparty/fmt/include/fmt/xchar.h
+++ /dev/null
@@ -1,236 +0,0 @@
-// Formatting library for C++ - optional wchar_t and exotic character support
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_XCHAR_H_
-#define FMT_XCHAR_H_
-
-#include <cwchar>
-#include <tuple>
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-namespace detail {
-template <typename T>
-using is_exotic_char = bool_constant<!std::is_same<T, char>::value>;
-}
-
-FMT_MODULE_EXPORT_BEGIN
-
-using wstring_view = basic_string_view<wchar_t>;
-using wformat_parse_context = basic_format_parse_context<wchar_t>;
-using wformat_context = buffer_context<wchar_t>;
-using wformat_args = basic_format_args<wformat_context>;
-using wmemory_buffer = basic_memory_buffer<wchar_t>;
-
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-// Workaround broken conversion on older gcc.
-template <typename... Args> using wformat_string = wstring_view;
-#else
-template <typename... Args>
-using wformat_string = basic_format_string<wchar_t, type_identity_t<Args>...>;
-#endif
-
-template <> struct is_char<wchar_t> : std::true_type {};
-template <> struct is_char<detail::char8_type> : std::true_type {};
-template <> struct is_char<char16_t> : std::true_type {};
-template <> struct is_char<char32_t> : std::true_type {};
-
-template <typename... Args>
-constexpr format_arg_store<wformat_context, Args...> make_wformat_args(
-    const Args&... args) {
-  return {args...};
-}
-
-inline namespace literals {
-constexpr auto operator"" _format(const wchar_t* s, size_t n)
-    -> detail::udl_formatter<wchar_t> {
-  return {{s, n}};
-}
-
-#if FMT_USE_USER_DEFINED_LITERALS && !FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-constexpr detail::udl_arg<wchar_t> operator"" _a(const wchar_t* s, size_t) {
-  return {s};
-}
-#endif
-}  // namespace literals
-
-template <typename It, typename Sentinel>
-auto join(It begin, Sentinel end, wstring_view sep)
-    -> join_view<It, Sentinel, wchar_t> {
-  return {begin, end, sep};
-}
-
-template <typename Range>
-auto join(Range&& range, wstring_view sep)
-    -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>,
-                 wchar_t> {
-  return join(std::begin(range), std::end(range), sep);
-}
-
-template <typename T>
-auto join(std::initializer_list<T> list, wstring_view sep)
-    -> join_view<const T*, const T*, wchar_t> {
-  return join(std::begin(list), std::end(list), sep);
-}
-
-template <typename Char, FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
-auto vformat(basic_string_view<Char> format_str,
-             basic_format_args<buffer_context<type_identity_t<Char>>> args)
-    -> std::basic_string<Char> {
-  basic_memory_buffer<Char> buffer;
-  detail::vformat_to(buffer, format_str, args);
-  return to_string(buffer);
-}
-
-// Pass char_t as a default template parameter instead of using
-// std::basic_string<char_t<S>> to reduce the symbol size.
-template <typename S, typename... Args, typename Char = char_t<S>,
-          FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
-auto format(const S& format_str, Args&&... args) -> std::basic_string<Char> {
-  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
-  return vformat(to_string_view(format_str), vargs);
-}
-
-template <typename Locale, typename S, typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_locale<Locale>::value&&
-                            detail::is_exotic_char<Char>::value)>
-inline auto vformat(
-    const Locale& loc, const S& format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args)
-    -> std::basic_string<Char> {
-  return detail::vformat(loc, to_string_view(format_str), args);
-}
-
-template <typename Locale, typename S, typename... Args,
-          typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_locale<Locale>::value&&
-                            detail::is_exotic_char<Char>::value)>
-inline auto format(const Locale& loc, const S& format_str, Args&&... args)
-    -> std::basic_string<Char> {
-  return detail::vformat(loc, to_string_view(format_str),
-                         fmt::make_args_checked<Args...>(format_str, args...));
-}
-
-template <typename OutputIt, typename S, typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
-                            detail::is_exotic_char<Char>::value)>
-auto vformat_to(OutputIt out, const S& format_str,
-                basic_format_args<buffer_context<type_identity_t<Char>>> args)
-    -> OutputIt {
-  auto&& buf = detail::get_buffer<Char>(out);
-  detail::vformat_to(buf, to_string_view(format_str), args);
-  return detail::get_iterator(buf);
-}
-
-template <typename OutputIt, typename S, typename... Args,
-          typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
-                            detail::is_exotic_char<Char>::value)>
-inline auto format_to(OutputIt out, const S& fmt, Args&&... args) -> OutputIt {
-  const auto& vargs = fmt::make_args_checked<Args...>(fmt, args...);
-  return vformat_to(out, to_string_view(fmt), vargs);
-}
-
-template <typename S, typename... Args, typename Char, size_t SIZE,
-          typename Allocator, FMT_ENABLE_IF(detail::is_string<S>::value)>
-FMT_DEPRECATED auto format_to(basic_memory_buffer<Char, SIZE, Allocator>& buf,
-                              const S& format_str, Args&&... args) ->
-    typename buffer_context<Char>::iterator {
-  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
-  detail::vformat_to(buf, to_string_view(format_str), vargs, {});
-  return detail::buffer_appender<Char>(buf);
-}
-
-template <typename Locale, typename S, typename OutputIt, typename... Args,
-          typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
-                            detail::is_locale<Locale>::value&&
-                                detail::is_exotic_char<Char>::value)>
-inline auto vformat_to(
-    OutputIt out, const Locale& loc, const S& format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args) -> OutputIt {
-  auto&& buf = detail::get_buffer<Char>(out);
-  vformat_to(buf, to_string_view(format_str), args, detail::locale_ref(loc));
-  return detail::get_iterator(buf);
-}
-
-template <
-    typename OutputIt, typename Locale, typename S, typename... Args,
-    typename Char = char_t<S>,
-    bool enable = detail::is_output_iterator<OutputIt, Char>::value&&
-        detail::is_locale<Locale>::value&& detail::is_exotic_char<Char>::value>
-inline auto format_to(OutputIt out, const Locale& loc, const S& format_str,
-                      Args&&... args) ->
-    typename std::enable_if<enable, OutputIt>::type {
-  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
-  return vformat_to(out, loc, to_string_view(format_str), vargs);
-}
-
-template <typename OutputIt, typename Char, typename... Args,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
-                            detail::is_exotic_char<Char>::value)>
-inline auto vformat_to_n(
-    OutputIt out, size_t n, basic_string_view<Char> format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args)
-    -> format_to_n_result<OutputIt> {
-  detail::iterator_buffer<OutputIt, Char, detail::fixed_buffer_traits> buf(out,
-                                                                           n);
-  detail::vformat_to(buf, format_str, args);
-  return {buf.out(), buf.count()};
-}
-
-template <typename OutputIt, typename S, typename... Args,
-          typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
-                            detail::is_exotic_char<Char>::value)>
-inline auto format_to_n(OutputIt out, size_t n, const S& fmt,
-                        const Args&... args) -> format_to_n_result<OutputIt> {
-  const auto& vargs = fmt::make_args_checked<Args...>(fmt, args...);
-  return vformat_to_n(out, n, to_string_view(fmt), vargs);
-}
-
-template <typename S, typename... Args, typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_exotic_char<Char>::value)>
-inline auto formatted_size(const S& fmt, Args&&... args) -> size_t {
-  detail::counting_buffer<Char> buf;
-  const auto& vargs = fmt::make_args_checked<Args...>(fmt, args...);
-  detail::vformat_to(buf, to_string_view(fmt), vargs);
-  return buf.count();
-}
-
-inline void vprint(std::FILE* f, wstring_view fmt, wformat_args args) {
-  wmemory_buffer buffer;
-  detail::vformat_to(buffer, fmt, args);
-  buffer.push_back(L'\0');
-  if (std::fputws(buffer.data(), f) == -1)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
-}
-
-inline void vprint(wstring_view fmt, wformat_args args) {
-  vprint(stdout, fmt, args);
-}
-
-template <typename... T>
-void print(std::FILE* f, wformat_string<T...> fmt, T&&... args) {
-  return vprint(f, wstring_view(fmt), fmt::make_wformat_args(args...));
-}
-
-template <typename... T> void print(wformat_string<T...> fmt, T&&... args) {
-  return vprint(wstring_view(fmt), fmt::make_wformat_args(args...));
-}
-
-/**
-  Converts *value* to ``std::wstring`` using the default format for type *T*.
- */
-template <typename T> inline auto to_wstring(const T& value) -> std::wstring {
-  return format(FMT_STRING(L"{}"), value);
-}
-FMT_MODULE_EXPORT_END
-FMT_END_NAMESPACE
-
-#endif  // FMT_XCHAR_H_
diff --git a/3rdparty/fmt/src/fmt.cc b/3rdparty/fmt/src/fmt.cc
deleted file mode 100644
index 80e77e26..00000000
--- a/3rdparty/fmt/src/fmt.cc
+++ /dev/null
@@ -1,99 +0,0 @@
-module;
-#ifndef __cpp_modules
-#  error Module not supported.
-#endif
-
-// put all implementation-provided headers into the global module fragment
-// to prevent attachment to this module
-#if !defined(_CRT_SECURE_NO_WARNINGS) && defined(_MSC_VER)
-#  define _CRT_SECURE_NO_WARNINGS
-#endif
-#if !defined(WIN32_LEAN_AND_MEAN) && defined(_WIN32)
-#  define WIN32_LEAN_AND_MEAN
-#endif
-
-#include <algorithm>
-#include <cctype>
-#include <cerrno>
-#include <chrono>
-#include <climits>
-#include <clocale>
-#include <cmath>
-#include <cstdarg>
-#include <cstddef>
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <ctime>
-#include <cwchar>
-#include <exception>
-#include <functional>
-#include <iterator>
-#include <limits>
-#include <locale>
-#include <memory>
-#include <ostream>
-#include <sstream>
-#include <stdexcept>
-#include <string>
-#include <string_view>
-#include <system_error>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#if _MSC_VER
-#  include <intrin.h>
-#endif
-#if defined __APPLE__ || defined(__FreeBSD__)
-#  include <xlocale.h>
-#endif
-#if __has_include(<winapifamily.h>)
-#  include <winapifamily.h>
-#endif
-#if (__has_include(<fcntl.h>) || defined(__APPLE__) || \
-     defined(__linux__)) &&                            \
-    (!defined(WINAPI_FAMILY) || (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
-#  include <fcntl.h>
-#  include <sys/stat.h>
-#  include <sys/types.h>
-#  ifndef _WIN32
-#    include <unistd.h>
-#  else
-#    include <io.h>
-#  endif
-#endif
-#ifdef _WIN32
-#  include <windows.h>
-#endif
-
-export module fmt;
-
-#define FMT_MODULE_EXPORT export
-#define FMT_MODULE_EXPORT_BEGIN export {
-#define FMT_MODULE_EXPORT_END }
-#define FMT_BEGIN_DETAIL_NAMESPACE \
-  }                                \
-  namespace detail {
-#define FMT_END_DETAIL_NAMESPACE \
-  }                              \
-  export {
-// all library-provided declarations and definitions
-// must be in the module purview to be exported
-#include "fmt/args.h"
-#include "fmt/chrono.h"
-#include "fmt/color.h"
-#include "fmt/compile.h"
-#include "fmt/format.h"
-#include "fmt/os.h"
-#include "fmt/printf.h"
-#include "fmt/xchar.h"
-
-// gcc doesn't yet implement private module fragments
-#if !FMT_GCC_VERSION
-module : private;
-#endif
-
-#include "format.cc"
-#include "os.cc"
diff --git a/3rdparty/fmt/src/format.cc b/3rdparty/fmt/src/format.cc
deleted file mode 100644
index ecb8cc79..00000000
--- a/3rdparty/fmt/src/format.cc
+++ /dev/null
@@ -1,124 +0,0 @@
-// Formatting library for C++
-//
-// Copyright (c) 2012 - 2016, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "fmt/format-inl.h"
-
-FMT_BEGIN_NAMESPACE
-namespace detail {
-
-// DEPRECATED!
-template <typename T = void> struct basic_data {
-  FMT_API static constexpr const char digits[100][2] = {
-      {'0', '0'}, {'0', '1'}, {'0', '2'}, {'0', '3'}, {'0', '4'}, {'0', '5'},
-      {'0', '6'}, {'0', '7'}, {'0', '8'}, {'0', '9'}, {'1', '0'}, {'1', '1'},
-      {'1', '2'}, {'1', '3'}, {'1', '4'}, {'1', '5'}, {'1', '6'}, {'1', '7'},
-      {'1', '8'}, {'1', '9'}, {'2', '0'}, {'2', '1'}, {'2', '2'}, {'2', '3'},
-      {'2', '4'}, {'2', '5'}, {'2', '6'}, {'2', '7'}, {'2', '8'}, {'2', '9'},
-      {'3', '0'}, {'3', '1'}, {'3', '2'}, {'3', '3'}, {'3', '4'}, {'3', '5'},
-      {'3', '6'}, {'3', '7'}, {'3', '8'}, {'3', '9'}, {'4', '0'}, {'4', '1'},
-      {'4', '2'}, {'4', '3'}, {'4', '4'}, {'4', '5'}, {'4', '6'}, {'4', '7'},
-      {'4', '8'}, {'4', '9'}, {'5', '0'}, {'5', '1'}, {'5', '2'}, {'5', '3'},
-      {'5', '4'}, {'5', '5'}, {'5', '6'}, {'5', '7'}, {'5', '8'}, {'5', '9'},
-      {'6', '0'}, {'6', '1'}, {'6', '2'}, {'6', '3'}, {'6', '4'}, {'6', '5'},
-      {'6', '6'}, {'6', '7'}, {'6', '8'}, {'6', '9'}, {'7', '0'}, {'7', '1'},
-      {'7', '2'}, {'7', '3'}, {'7', '4'}, {'7', '5'}, {'7', '6'}, {'7', '7'},
-      {'7', '8'}, {'7', '9'}, {'8', '0'}, {'8', '1'}, {'8', '2'}, {'8', '3'},
-      {'8', '4'}, {'8', '5'}, {'8', '6'}, {'8', '7'}, {'8', '8'}, {'8', '9'},
-      {'9', '0'}, {'9', '1'}, {'9', '2'}, {'9', '3'}, {'9', '4'}, {'9', '5'},
-      {'9', '6'}, {'9', '7'}, {'9', '8'}, {'9', '9'}};
-  FMT_API static constexpr const char hex_digits[] = "0123456789abcdef";
-  FMT_API static constexpr const char signs[4] = {0, '-', '+', ' '};
-  FMT_API static constexpr const char left_padding_shifts[5] = {31, 31, 0, 1,
-                                                                0};
-  FMT_API static constexpr const char right_padding_shifts[5] = {0, 31, 0, 1,
-                                                                 0};
-  FMT_API static constexpr const unsigned prefixes[4] = {0, 0, 0x1000000u | '+',
-                                                         0x1000000u | ' '};
-};
-
-#ifdef FMT_SHARED
-// Required for -flto, -fivisibility=hidden and -shared to work
-extern template struct basic_data<void>;
-#endif
-
-#if __cplusplus < 201703L
-// DEPRECATED! These are here only for ABI compatiblity.
-template <typename T> constexpr const char basic_data<T>::digits[][2];
-template <typename T> constexpr const char basic_data<T>::hex_digits[];
-template <typename T> constexpr const char basic_data<T>::signs[];
-template <typename T> constexpr const char basic_data<T>::left_padding_shifts[];
-template <typename T>
-constexpr const char basic_data<T>::right_padding_shifts[];
-template <typename T> constexpr const unsigned basic_data<T>::prefixes[];
-#endif
-
-template <typename T>
-int format_float(char* buf, std::size_t size, const char* format, int precision,
-                 T value) {
-#ifdef FMT_FUZZ
-  if (precision > 100000)
-    throw std::runtime_error(
-        "fuzz mode - avoid large allocation inside snprintf");
-#endif
-  // Suppress the warning about nonliteral format string.
-  int (*snprintf_ptr)(char*, size_t, const char*, ...) = FMT_SNPRINTF;
-  return precision < 0 ? snprintf_ptr(buf, size, format, value)
-                       : snprintf_ptr(buf, size, format, precision, value);
-}
-
-template FMT_API dragonbox::decimal_fp<float> dragonbox::to_decimal(float x)
-    FMT_NOEXCEPT;
-template FMT_API dragonbox::decimal_fp<double> dragonbox::to_decimal(double x)
-    FMT_NOEXCEPT;
-}  // namespace detail
-
-// Workaround a bug in MSVC2013 that prevents instantiation of format_float.
-int (*instantiate_format_float)(double, int, detail::float_specs,
-                                detail::buffer<char>&) = detail::format_float;
-
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-template FMT_API detail::locale_ref::locale_ref(const std::locale& loc);
-template FMT_API std::locale detail::locale_ref::get<std::locale>() const;
-#endif
-
-// Explicit instantiations for char.
-
-template FMT_API auto detail::thousands_sep_impl(locale_ref)
-    -> thousands_sep_result<char>;
-template FMT_API char detail::decimal_point_impl(locale_ref);
-
-template FMT_API void detail::buffer<char>::append(const char*, const char*);
-
-// DEPRECATED!
-// There is no correspondent extern template in format.h because of
-// incompatibility between clang and gcc (#2377).
-template FMT_API void detail::vformat_to(
-    detail::buffer<char>&, string_view,
-    basic_format_args<FMT_BUFFER_CONTEXT(char)>, detail::locale_ref);
-
-template FMT_API int detail::snprintf_float(double, int, detail::float_specs,
-                                            detail::buffer<char>&);
-template FMT_API int detail::snprintf_float(long double, int,
-                                            detail::float_specs,
-                                            detail::buffer<char>&);
-template FMT_API int detail::format_float(double, int, detail::float_specs,
-                                          detail::buffer<char>&);
-template FMT_API int detail::format_float(long double, int, detail::float_specs,
-                                          detail::buffer<char>&);
-
-// Explicit instantiations for wchar_t.
-
-template FMT_API auto detail::thousands_sep_impl(locale_ref)
-    -> thousands_sep_result<wchar_t>;
-template FMT_API wchar_t detail::decimal_point_impl(locale_ref);
-
-template FMT_API void detail::buffer<wchar_t>::append(const wchar_t*,
-                                                      const wchar_t*);
-
-template struct detail::basic_data<void>;
-
-FMT_END_NAMESPACE
diff --git a/3rdparty/fmt/src/os.cc b/3rdparty/fmt/src/os.cc
deleted file mode 100644
index 04b4dc50..00000000
--- a/3rdparty/fmt/src/os.cc
+++ /dev/null
@@ -1,361 +0,0 @@
-// Formatting library for C++ - optional OS-specific functionality
-//
-// Copyright (c) 2012 - 2016, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-// Disable bogus MSVC warnings.
-#if !defined(_CRT_SECURE_NO_WARNINGS) && defined(_MSC_VER)
-#  define _CRT_SECURE_NO_WARNINGS
-#endif
-
-#include "fmt/os.h"
-
-#include <climits>
-
-#if FMT_USE_FCNTL
-#  include <sys/stat.h>
-#  include <sys/types.h>
-
-#  ifndef _WIN32
-#    include <unistd.h>
-#  else
-#    ifndef WIN32_LEAN_AND_MEAN
-#      define WIN32_LEAN_AND_MEAN
-#    endif
-#    include <io.h>
-
-#    ifndef S_IRUSR
-#      define S_IRUSR _S_IREAD
-#    endif
-#    ifndef S_IWUSR
-#      define S_IWUSR _S_IWRITE
-#    endif
-#    ifndef S_IRGRP
-#      define S_IRGRP 0
-#    endif
-#    ifndef S_IROTH
-#      define S_IROTH 0
-#    endif
-#  endif  // _WIN32
-#endif    // FMT_USE_FCNTL
-
-#ifdef _WIN32
-#  include <windows.h>
-#endif
-
-#ifdef fileno
-#  undef fileno
-#endif
-
-namespace {
-#ifdef _WIN32
-// Return type of read and write functions.
-using rwresult = int;
-
-// On Windows the count argument to read and write is unsigned, so convert
-// it from size_t preventing integer overflow.
-inline unsigned convert_rwcount(std::size_t count) {
-  return count <= UINT_MAX ? static_cast<unsigned>(count) : UINT_MAX;
-}
-#elif FMT_USE_FCNTL
-// Return type of read and write functions.
-using rwresult = ssize_t;
-
-inline std::size_t convert_rwcount(std::size_t count) { return count; }
-#endif
-}  // namespace
-
-FMT_BEGIN_NAMESPACE
-
-#ifdef _WIN32
-detail::utf16_to_utf8::utf16_to_utf8(basic_string_view<wchar_t> s) {
-  if (int error_code = convert(s)) {
-    FMT_THROW(windows_error(error_code,
-                            "cannot convert string from UTF-16 to UTF-8"));
-  }
-}
-
-int detail::utf16_to_utf8::convert(basic_string_view<wchar_t> s) {
-  if (s.size() > INT_MAX) return ERROR_INVALID_PARAMETER;
-  int s_size = static_cast<int>(s.size());
-  if (s_size == 0) {
-    // WideCharToMultiByte does not support zero length, handle separately.
-    buffer_.resize(1);
-    buffer_[0] = 0;
-    return 0;
-  }
-
-  int length = WideCharToMultiByte(CP_UTF8, 0, s.data(), s_size, nullptr, 0,
-                                   nullptr, nullptr);
-  if (length == 0) return GetLastError();
-  buffer_.resize(length + 1);
-  length = WideCharToMultiByte(CP_UTF8, 0, s.data(), s_size, &buffer_[0],
-                               length, nullptr, nullptr);
-  if (length == 0) return GetLastError();
-  buffer_[length] = 0;
-  return 0;
-}
-
-namespace detail {
-
-class system_message {
-  system_message(const system_message&) = delete;
-  void operator=(const system_message&) = delete;
-
-  unsigned long result_;
-  wchar_t* message_;
-
-  static bool is_whitespace(wchar_t c) FMT_NOEXCEPT {
-    return c == L' ' || c == L'\n' || c == L'\r' || c == L'\t' || c == L'\0';
-  }
-
- public:
-  explicit system_message(unsigned long error_code)
-      : result_(0), message_(nullptr) {
-    result_ = FormatMessageW(
-        FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
-            FORMAT_MESSAGE_IGNORE_INSERTS,
-        nullptr, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-        reinterpret_cast<wchar_t*>(&message_), 0, nullptr);
-    if (result_ != 0) {
-      while (result_ != 0 && is_whitespace(message_[result_ - 1])) {
-        --result_;
-      }
-    }
-  }
-  ~system_message() { LocalFree(message_); }
-  explicit operator bool() const FMT_NOEXCEPT { return result_ != 0; }
-  operator basic_string_view<wchar_t>() const FMT_NOEXCEPT {
-    return basic_string_view<wchar_t>(message_, result_);
-  }
-};
-
-class utf8_system_category final : public std::error_category {
- public:
-  const char* name() const FMT_NOEXCEPT override { return "system"; }
-  std::string message(int error_code) const override {
-    system_message msg(error_code);
-    if (msg) {
-      utf16_to_utf8 utf8_message;
-      if (utf8_message.convert(msg) == ERROR_SUCCESS) {
-        return utf8_message.str();
-      }
-    }
-    return "unknown error";
-  }
-};
-
-}  // namespace detail
-
-FMT_API const std::error_category& system_category() FMT_NOEXCEPT {
-  static const detail::utf8_system_category category;
-  return category;
-}
-
-std::system_error vwindows_error(int err_code, string_view format_str,
-                                 format_args args) {
-  auto ec = std::error_code(err_code, system_category());
-  return std::system_error(ec, vformat(format_str, args));
-}
-
-void detail::format_windows_error(detail::buffer<char>& out, int error_code,
-                                  const char* message) FMT_NOEXCEPT {
-  FMT_TRY {
-    system_message msg(error_code);
-    if (msg) {
-      utf16_to_utf8 utf8_message;
-      if (utf8_message.convert(msg) == ERROR_SUCCESS) {
-        format_to(buffer_appender<char>(out), "{}: {}", message, utf8_message);
-        return;
-      }
-    }
-  }
-  FMT_CATCH(...) {}
-  format_error_code(out, error_code, message);
-}
-
-void report_windows_error(int error_code, const char* message) FMT_NOEXCEPT {
-  report_error(detail::format_windows_error, error_code, message);
-}
-#endif  // _WIN32
-
-buffered_file::~buffered_file() FMT_NOEXCEPT {
-  if (file_ && FMT_SYSTEM(fclose(file_)) != 0)
-    report_system_error(errno, "cannot close file");
-}
-
-buffered_file::buffered_file(cstring_view filename, cstring_view mode) {
-  FMT_RETRY_VAL(file_, FMT_SYSTEM(fopen(filename.c_str(), mode.c_str())),
-                nullptr);
-  if (!file_)
-    FMT_THROW(system_error(errno, "cannot open file {}", filename.c_str()));
-}
-
-void buffered_file::close() {
-  if (!file_) return;
-  int result = FMT_SYSTEM(fclose(file_));
-  file_ = nullptr;
-  if (result != 0) FMT_THROW(system_error(errno, "cannot close file"));
-}
-
-// A macro used to prevent expansion of fileno on broken versions of MinGW.
-#define FMT_ARGS
-
-int buffered_file::fileno() const {
-  int fd = FMT_POSIX_CALL(fileno FMT_ARGS(file_));
-  if (fd == -1) FMT_THROW(system_error(errno, "cannot get file descriptor"));
-  return fd;
-}
-
-#if FMT_USE_FCNTL
-file::file(cstring_view path, int oflag) {
-#  ifdef _WIN32
-  using mode_t = int;
-#  endif
-  mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
-#  if defined(_WIN32) && !defined(__MINGW32__)
-  fd_ = -1;
-  FMT_POSIX_CALL(sopen_s(&fd_, path.c_str(), oflag, _SH_DENYNO, mode));
-#  else
-  FMT_RETRY(fd_, FMT_POSIX_CALL(open(path.c_str(), oflag, mode)));
-#  endif
-  if (fd_ == -1)
-    FMT_THROW(system_error(errno, "cannot open file {}", path.c_str()));
-}
-
-file::~file() FMT_NOEXCEPT {
-  // Don't retry close in case of EINTR!
-  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
-  if (fd_ != -1 && FMT_POSIX_CALL(close(fd_)) != 0)
-    report_system_error(errno, "cannot close file");
-}
-
-void file::close() {
-  if (fd_ == -1) return;
-  // Don't retry close in case of EINTR!
-  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
-  int result = FMT_POSIX_CALL(close(fd_));
-  fd_ = -1;
-  if (result != 0) FMT_THROW(system_error(errno, "cannot close file"));
-}
-
-long long file::size() const {
-#  ifdef _WIN32
-  // Use GetFileSize instead of GetFileSizeEx for the case when _WIN32_WINNT
-  // is less than 0x0500 as is the case with some default MinGW builds.
-  // Both functions support large file sizes.
-  DWORD size_upper = 0;
-  HANDLE handle = reinterpret_cast<HANDLE>(_get_osfhandle(fd_));
-  DWORD size_lower = FMT_SYSTEM(GetFileSize(handle, &size_upper));
-  if (size_lower == INVALID_FILE_SIZE) {
-    DWORD error = GetLastError();
-    if (error != NO_ERROR)
-      FMT_THROW(windows_error(GetLastError(), "cannot get file size"));
-  }
-  unsigned long long long_size = size_upper;
-  return (long_size << sizeof(DWORD) * CHAR_BIT) | size_lower;
-#  else
-  using Stat = struct stat;
-  Stat file_stat = Stat();
-  if (FMT_POSIX_CALL(fstat(fd_, &file_stat)) == -1)
-    FMT_THROW(system_error(errno, "cannot get file attributes"));
-  static_assert(sizeof(long long) >= sizeof(file_stat.st_size),
-                "return type of file::size is not large enough");
-  return file_stat.st_size;
-#  endif
-}
-
-std::size_t file::read(void* buffer, std::size_t count) {
-  rwresult result = 0;
-  FMT_RETRY(result, FMT_POSIX_CALL(read(fd_, buffer, convert_rwcount(count))));
-  if (result < 0) FMT_THROW(system_error(errno, "cannot read from file"));
-  return detail::to_unsigned(result);
-}
-
-std::size_t file::write(const void* buffer, std::size_t count) {
-  rwresult result = 0;
-  FMT_RETRY(result, FMT_POSIX_CALL(write(fd_, buffer, convert_rwcount(count))));
-  if (result < 0) FMT_THROW(system_error(errno, "cannot write to file"));
-  return detail::to_unsigned(result);
-}
-
-file file::dup(int fd) {
-  // Don't retry as dup doesn't return EINTR.
-  // http://pubs.opengroup.org/onlinepubs/009695399/functions/dup.html
-  int new_fd = FMT_POSIX_CALL(dup(fd));
-  if (new_fd == -1)
-    FMT_THROW(system_error(errno, "cannot duplicate file descriptor {}", fd));
-  return file(new_fd);
-}
-
-void file::dup2(int fd) {
-  int result = 0;
-  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
-  if (result == -1) {
-    FMT_THROW(system_error(errno, "cannot duplicate file descriptor {} to {}",
-                           fd_, fd));
-  }
-}
-
-void file::dup2(int fd, std::error_code& ec) FMT_NOEXCEPT {
-  int result = 0;
-  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
-  if (result == -1) ec = std::error_code(errno, std::generic_category());
-}
-
-void file::pipe(file& read_end, file& write_end) {
-  // Close the descriptors first to make sure that assignments don't throw
-  // and there are no leaks.
-  read_end.close();
-  write_end.close();
-  int fds[2] = {};
-#  ifdef _WIN32
-  // Make the default pipe capacity same as on Linux 2.6.11+.
-  enum { DEFAULT_CAPACITY = 65536 };
-  int result = FMT_POSIX_CALL(pipe(fds, DEFAULT_CAPACITY, _O_BINARY));
-#  else
-  // Don't retry as the pipe function doesn't return EINTR.
-  // http://pubs.opengroup.org/onlinepubs/009696799/functions/pipe.html
-  int result = FMT_POSIX_CALL(pipe(fds));
-#  endif
-  if (result != 0) FMT_THROW(system_error(errno, "cannot create pipe"));
-  // The following assignments don't throw because read_fd and write_fd
-  // are closed.
-  read_end = file(fds[0]);
-  write_end = file(fds[1]);
-}
-
-buffered_file file::fdopen(const char* mode) {
-// Don't retry as fdopen doesn't return EINTR.
-#  if defined(__MINGW32__) && defined(_POSIX_)
-  FILE* f = ::fdopen(fd_, mode);
-#  else
-  FILE* f = FMT_POSIX_CALL(fdopen(fd_, mode));
-#  endif
-  if (!f)
-    FMT_THROW(
-        system_error(errno, "cannot associate stream with file descriptor"));
-  buffered_file bf(f);
-  fd_ = -1;
-  return bf;
-}
-
-long getpagesize() {
-#  ifdef _WIN32
-  SYSTEM_INFO si;
-  GetSystemInfo(&si);
-  return si.dwPageSize;
-#  else
-  long size = FMT_POSIX_CALL(sysconf(_SC_PAGESIZE));
-  if (size < 0) FMT_THROW(system_error(errno, "cannot get memory page size"));
-  return size;
-#  endif
-}
-
-FMT_API void ostream::grow(size_t) {
-  if (this->size() == this->capacity()) flush();
-}
-#endif  // FMT_USE_FCNTL
-FMT_END_NAMESPACE
diff --git a/3rdparty/fmt/support/Android.mk b/3rdparty/fmt/support/Android.mk
deleted file mode 100644
index 84a3e32f..00000000
--- a/3rdparty/fmt/support/Android.mk
+++ /dev/null
@@ -1,15 +0,0 @@
-LOCAL_PATH := $(call my-dir)
-include $(CLEAR_VARS)
-
-LOCAL_MODULE := fmt_static
-LOCAL_MODULE_FILENAME := libfmt
-
-LOCAL_SRC_FILES := ../src/format.cc
-
-LOCAL_C_INCLUDES := $(LOCAL_PATH)
-LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)
-
-LOCAL_CFLAGS += -std=c++11 -fexceptions
-
-include $(BUILD_STATIC_LIBRARY)
-
diff --git a/3rdparty/fmt/support/AndroidManifest.xml b/3rdparty/fmt/support/AndroidManifest.xml
deleted file mode 100644
index b5281fee..00000000
--- a/3rdparty/fmt/support/AndroidManifest.xml
+++ /dev/null
@@ -1 +0,0 @@
-<manifest package="net.fmtlib" />
diff --git a/3rdparty/fmt/support/C++.sublime-syntax b/3rdparty/fmt/support/C++.sublime-syntax
deleted file mode 100644
index 9dfb5cbe..00000000
--- a/3rdparty/fmt/support/C++.sublime-syntax
+++ /dev/null
@@ -1,2061 +0,0 @@
-%YAML 1.2
----
-# http://www.sublimetext.com/docs/3/syntax.html
-name: C++ (fmt)
-comment: I don't think anyone uses .hp. .cp tends to be paired with .h. (I could be wrong. :) -- chris
-file_extensions:
-  - cpp
-  - cc
-  - cp
-  - cxx
-  - c++
-  - C
-  - h
-  - hh
-  - hpp
-  - hxx
-  - h++
-  - inl
-  - ipp
-first_line_match: '-\*- C\+\+ -\*-'
-scope: source.c++
-variables:
-  identifier: \b[[:alpha:]_][[:alnum:]_]*\b # upper and lowercase
-  macro_identifier: \b[[:upper:]_][[:upper:][:digit:]_]{2,}\b # only uppercase, at least 3 chars
-  path_lookahead: '(?:::\s*)?(?:{{identifier}}\s*::\s*)*(?:template\s+)?{{identifier}}'
-  operator_method_name: '\boperator\s*(?:[-+*/%^&|~!=<>]|[-+*/%^&|=!<>]=|<<=?|>>=?|&&|\|\||\+\+|--|,|->\*?|\(\)|\[\]|""\s*{{identifier}})'
-  casts: 'const_cast|dynamic_cast|reinterpret_cast|static_cast'
-  operator_keywords: 'and|and_eq|bitand|bitor|compl|not|not_eq|or|or_eq|xor|xor_eq|noexcept'
-  control_keywords: 'break|case|catch|continue|default|do|else|for|goto|if|_Pragma|return|switch|throw|try|while'
-  memory_operators: 'new|delete'
-  basic_types: 'asm|__asm__|auto|bool|_Bool|char|_Complex|double|float|_Imaginary|int|long|short|signed|unsigned|void'
-  before_tag: 'struct|union|enum\s+class|enum\s+struct|enum|class'
-  declspec: '__declspec\(\s*\w+(?:\([^)]+\))?\s*\)'
-  storage_classes: 'static|export|extern|friend|explicit|virtual|register|thread_local'
-  type_qualifier: 'const|constexpr|mutable|typename|volatile'
-  compiler_directive: 'inline|restrict|__restrict__|__restrict'
-  visibility_modifiers: 'private|protected|public'
-  other_keywords: 'typedef|nullptr|{{visibility_modifiers}}|static_assert|sizeof|using|typeid|alignof|alignas|namespace|template'
-  modifiers: '{{storage_classes}}|{{type_qualifier}}|{{compiler_directive}}'
-  non_angle_brackets: '(?=<<|<=)'
-
-  regular: '[^(){}&;*^%=<>-]*'
-  paren_open: (?:\(
-  paren_close: '\))?'
-  generic_open: (?:<
-  generic_close: '>)?'
-  balance_parentheses: '{{regular}}{{paren_open}}{{regular}}{{paren_close}}{{regular}}'
-  generic_lookahead: <{{regular}}{{generic_open}}{{regular}}{{generic_open}}{{regular}}{{generic_close}}\s*{{generic_close}}{{balance_parentheses}}>
-
-  data_structures_forward_decl_lookahead: '(\s+{{macro_identifier}})*\s*(:\s*({{path_lookahead}}|{{visibility_modifiers}}|,|\s|<[^;]*>)+)?;'
-  non_func_keywords: 'if|for|switch|while|decltype|sizeof|__declspec|__attribute__|typeid|alignof|alignas|static_assert'
-
-  format_spec: |-
-    (?x:
-      (?:.? [<>=^])?     # fill align
-      [ +-]?             # sign
-      \#?                # alternate form
-      # technically, octal and hexadecimal integers are also supported as 'width', but rarely used
-      \d*                # width
-      ,?                 # thousands separator
-      (?:\.\d+)?         # precision
-      [bcdeEfFgGnosxX%]? # type
-    )
-
-contexts:
-  main:
-    - include: preprocessor-global
-    - include: global
-
-  #############################################################################
-  # Reusable contexts
-  #
-  # The follow contexts are currently constructed to be reused in the
-  # Objetive-C++ syntax. They are specifically constructed to not push into
-  # sub-contexts, which ensures that Objective-C++ code isn't accidentally
-  # lexed as plain C++.
-  #
-  # The "unique-*" contexts are additions that C++ makes over C, and thus can
-  # be directly reused in Objective-C++ along with contexts from Objective-C
-  # and C.
-  #############################################################################
-
-  unique-late-expressions:
-    # This is highlighted after all of the other control keywords
-    # to allow operator overloading to be lexed properly
-    - match: \boperator\b
-      scope: keyword.control.c++
-
-  unique-modifiers:
-    - match: \b({{modifiers}})\b
-      scope: storage.modifier.c++
-
-  unique-variables:
-    - match: \bthis\b
-      scope: variable.language.c++
-    # common C++ instance var naming idiom -- fMemberName
-    - match: '\b(f|m)[[:upper:]]\w*\b'
-      scope: variable.other.readwrite.member.c++
-    # common C++ instance var naming idiom -- m_member_name
-    - match: '\bm_[[:alnum:]_]+\b'
-      scope: variable.other.readwrite.member.c++
-
-  unique-constants:
-    - match: \bnullptr\b
-      scope: constant.language.c++
-
-  unique-keywords:
-    - match: \busing\b
-      scope: keyword.control.c++
-    - match: \bbreak\b
-      scope: keyword.control.flow.break.c++
-    - match: \bcontinue\b
-      scope: keyword.control.flow.continue.c++
-    - match: \bgoto\b
-      scope: keyword.control.flow.goto.c++
-    - match: \breturn\b
-      scope: keyword.control.flow.return.c++
-    - match: \bthrow\b
-      scope: keyword.control.flow.throw.c++
-    - match: \b({{control_keywords}})\b
-      scope: keyword.control.c++
-    - match: '\bdelete\b(\s*\[\])?|\bnew\b(?!])'
-      scope: keyword.control.c++
-    - match: \b({{operator_keywords}})\b
-      scope: keyword.operator.word.c++
-
-  unique-types:
-    - match: \b(char16_t|char32_t|wchar_t|nullptr_t)\b
-      scope: storage.type.c++
-    - match: \bclass\b
-      scope: storage.type.c++
-
-  unique-strings:
-    - match: '((?:L|u8|u|U)?R)("([^\(\)\\ ]{0,16})\()'
-      captures:
-        1: storage.type.string.c++
-        2: punctuation.definition.string.begin.c++
-      push:
-        - meta_scope: string.quoted.double.c++
-        - match: '\)\3"'
-          scope: punctuation.definition.string.end.c++
-          pop: true
-        - match: '\{\{|\}\}'
-          scope: constant.character.escape.c++
-        - include: formatting-syntax
-
-  unique-numbers:
-    - match: |-
-        (?x)
-        (?:
-        # floats
-          (?:
-          (?:\b\d(?:[\d']*\d)?\.\d(?:[\d']*\d)?|\B\.\d(?:[\d']*\d)?)(?:[Ee][+-]?\d(?:[\d']*\d)?)?(?:[fFlL]|(?:i[fl]?|h|min|[mun]?s|_\w*))?\b
-          |
-          (?:\b\d(?:[\d']*\d)?\.)(?:\B|(?:[fFlL]|(?:i[fl]?|h|min|[mun]?s|_\w*))\b|(?:[Ee][+-]?\d(?:[\d']*\d)?)(?:[fFlL]|(?:i[fl]?|h|min|[mun]?s|_\w*))?\b)
-          |
-          \b\d(?:[\d']*\d)?(?:[Ee][+-]?\d(?:[\d']*\d)?)(?:[fFlL]|(?:i[fl]?|h|min|[mun]?s|_\w*))?\b
-          )
-        |
-        # ints
-          \b(?:
-          (?:
-          # dec
-          [1-9](?:[\d']*\d)?
-          |
-          # oct
-          0(?:[0-7']*[0-7])?
-          |
-          # hex
-          0[Xx][\da-fA-F](?:[\da-fA-F']*[\da-fA-F])?
-          |
-          # bin
-          0[Bb][01](?:[01']*[01])?
-          )
-          # int suffixes
-          (?:(?:l{1,2}|L{1,2})[uU]?|[uU](?:l{0,2}|L{0,2})|(?:i[fl]?|h|min|[mun]?s|_\w*))?)\b
-        )
-        (?!\.) # Number must not be followed by a decimal point
-      scope: constant.numeric.c++
-
-  identifiers:
-    - match: '{{identifier}}\s*(::)\s*'
-      captures:
-        1: punctuation.accessor.c++
-    - match: '(?:(::)\s*)?{{identifier}}'
-      captures:
-        1: punctuation.accessor.c++
-
-  function-specifiers:
-    - match: \b(const|final|noexcept|override)\b
-      scope: storage.modifier.c++
-
-  #############################################################################
-  # The following are C++-specific contexts that should not be reused. This is
-  # because they push into subcontexts and use variables that are C++-specific.
-  #############################################################################
-
-  ## Common context layout
-
-  global:
-    - match: '(?=\btemplate\b)'
-      push:
-        - include: template
-        - match: (?=\S)
-          set: global-modifier
-    - include: namespace
-    - include: keywords-angle-brackets
-    - match: '(?={{path_lookahead}}\s*<)'
-      push: global-modifier
-    # Take care of comments just before a function definition.
-    - match: /\*
-      scope: punctuation.definition.comment.c
-      push:
-        - - match: \s*(?=\w)
-            set: global-modifier
-          - match: ""
-            pop: true
-        - - meta_scope: comment.block.c
-          - match: \*/
-            scope: punctuation.definition.comment.c
-            pop: true
-    - include: early-expressions
-    - match: ^\s*\b(extern)(?=\s+"C(\+\+)?")
-      scope: storage.modifier.c++
-      push:
-        - include: comments
-        - include: strings
-        - match: '\{'
-          scope: punctuation.section.block.begin.c++
-          set:
-            - meta_scope: meta.extern-c.c++
-            - match: '^\s*(#\s*ifdef)\s*__cplusplus\s*'
-              scope: meta.preprocessor.c++
-              captures:
-                1: keyword.control.import.c++
-              set:
-                - match: '\}'
-                  scope: punctuation.section.block.end.c++
-                  pop: true
-                - include: preprocessor-global
-                - include: global
-            - match: '\}'
-              scope: punctuation.section.block.end.c++
-              pop: true
-            - include: preprocessor-global
-            - include: global
-        - match: (?=\S)
-          set: global-modifier
-    - match: ^\s*(?=\w)
-      push: global-modifier
-    - include: late-expressions
-
-  statements:
-    - include: preprocessor-statements
-    - include: scope:source.c#label
-    - include: expressions
-
-  expressions:
-    - include: early-expressions
-    - include: late-expressions
-
-  early-expressions:
-    - include: early-expressions-before-generic-type
-    - include: generic-type
-    - include: early-expressions-after-generic-type
-
-  early-expressions-before-generic-type:
-    - include: preprocessor-expressions
-    - include: comments
-    - include: case-default
-    - include: typedef
-    - include: keywords-angle-brackets
-    - include: keywords-parens
-    - include: keywords
-    - include: numbers
-    # Prevent a '<' from getting scoped as the start of another template
-    # parameter list, if in reality a less-than-or-equals sign is meant.
-    - match: <=
-      scope: keyword.operator.comparison.c
-
-  early-expressions-after-generic-type:
-    - include: members-arrow
-    - include: operators
-    - include: members-dot
-    - include: strings
-    - include: parens
-    - include: brackets
-    - include: block
-    - include: variables
-    - include: constants
-    - match: ','
-      scope: punctuation.separator.c++
-    - match: '\)|\}'
-      scope: invalid.illegal.stray-bracket-end.c++
-
-  expressions-minus-generic-type:
-    - include: early-expressions-before-generic-type
-    - include: angle-brackets
-    - include: early-expressions-after-generic-type
-    - include: late-expressions
-
-  expressions-minus-generic-type-function-call:
-    - include: early-expressions-before-generic-type
-    - include: angle-brackets
-    - include: early-expressions-after-generic-type
-    - include: late-expressions-before-function-call
-    - include: identifiers
-    - match: ';'
-      scope: punctuation.terminator.c++
-
-  late-expressions:
-    - include: late-expressions-before-function-call
-    - include: function-call
-    - include: identifiers
-    - match: ';'
-      scope: punctuation.terminator.c++
-
-  late-expressions-before-function-call:
-    - include: unique-late-expressions
-    - include: modifiers-parens
-    - include: modifiers
-    - include: types
-
-  expressions-minus-function-call:
-    - include: early-expressions
-    - include: late-expressions-before-function-call
-    - include: identifiers
-    - match: ';'
-      scope: punctuation.terminator.c++
-
-  comments:
-    - include: scope:source.c#comments
-
-  operators:
-    - include: scope:source.c#operators
-
-  modifiers:
-    - include: unique-modifiers
-    - include: scope:source.c#modifiers
-
-  variables:
-    - include: unique-variables
-    - include: scope:source.c#variables
-
-  constants:
-    - include: unique-constants
-    - include: scope:source.c#constants
-
-  keywords:
-    - include: unique-keywords
-    - include: scope:source.c#keywords
-
-  types:
-    - include: unique-types
-    - include: types-parens
-    - include: scope:source.c#types
-
-  strings:
-    - include: unique-strings
-    - match: '(L|u8|u|U)?(")'
-      captures:
-        1: storage.type.string.c++
-        2: punctuation.definition.string.begin.c++
-      push:
-        - meta_scope: string.quoted.double.c++
-        - match: '"'
-          scope: punctuation.definition.string.end.c++
-          pop: true
-        - include: scope:source.c#string_escaped_char
-        - match: |-
-            (?x)%
-              (\d+\$)?                                      # field (argument #)
-              [#0\- +']*                                    # flags
-              [,;:_]?                                       # separator character (AltiVec)
-              ((-?\d+)|\*(-?\d+\$)?)?                       # minimum field width
-              (\.((-?\d+)|\*(-?\d+\$)?)?)?                  # precision
-              (hh|h|ll|l|j|t|z|q|L|vh|vl|v|hv|hl)?          # length modifier
-              (\[[^\]]+\]|[am]s|[diouxXDOUeEfFgGaACcSspn%]) # conversion type
-          scope: constant.other.placeholder.c++
-        - match: '\{\{|\}\}'
-          scope: constant.character.escape.c++
-        - include: formatting-syntax
-    - include: scope:source.c#strings
-
-  formatting-syntax:
-    # https://docs.python.org/3.6/library/string.html#formatstrings
-    - match: |- # simple form
-        (?x)
-        (\{)
-          (?: [\w.\[\]]+)?             # field_name
-          (   ! [ars])?                # conversion
-          (   : (?:{{format_spec}}|    # format_spec OR
-                   [^}%]*%.[^}]*)      # any format-like string
-          )?
-        (\})
-      scope: constant.other.placeholder.c++
-      captures:
-        1: punctuation.definition.placeholder.begin.c++
-        2: storage.modifier.c++onversion.c++
-        3: constant.other.format-spec.c++
-        4: punctuation.definition.placeholder.end.c++
-    - match: \{(?=[^\}"']+\{[^"']*\}) # complex (nested) form
-      scope: punctuation.definition.placeholder.begin.c++
-      push:
-        - meta_scope: constant.other.placeholder.c++
-        - match: \}
-          scope: punctuation.definition.placeholder.end.c++
-          pop: true
-        - match: '[\w.\[\]]+'
-        - match: '![ars]'
-          scope: storage.modifier.conversion.c++
-        - match: ':'
-          push:
-            - meta_scope: meta.format-spec.c++ constant.other.format-spec.c++
-            - match: (?=\})
-              pop: true
-            - include: formatting-syntax
-
-  numbers:
-    - include: unique-numbers
-    - include: scope:source.c#numbers
-
-  ## C++-specific contexts
-
-  case-default:
-    - match: '\b(default|case)\b'
-      scope: keyword.control.c++
-      push:
-        - match: (?=[);,])
-          pop: true
-        - match: ':'
-          scope: punctuation.separator.c++
-          pop: true
-        - include: expressions
-
-  modifiers-parens:
-    - match: '\b(alignas)\b\s*(\()'
-      captures:
-        1: storage.modifier.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push:
-        - meta_content_scope: meta.group.c++
-        - match: '\)'
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-        - include: expressions
-    - match: \b(__attribute__)\s*(\(\()
-      captures:
-        1: storage.modifier.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push :
-        - meta_scope: meta.attribute.c++
-        - meta_content_scope: meta.group.c++
-        - include: parens
-        - include: strings
-        - match: \)\)
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-    - match: \b(__declspec)(\()
-      captures:
-        1: storage.modifier.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push:
-        - meta_content_scope: meta.group.c++
-        - match: '\)'
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-        - match: '\b(align|allocate|code_seg|deprecated|property|uuid)\b\s*(\()'
-          captures:
-            1: storage.modifier.c++
-            2: meta.group.c++ punctuation.section.group.begin.c++
-          push:
-            - meta_content_scope: meta.group.c++
-            - match: '\)'
-              scope: meta.group.c++ punctuation.section.group.end.c++
-              pop: true
-            - include: numbers
-            - include: strings
-            - match: \b(get|put)\b
-              scope: variable.parameter.c++
-            - match: ','
-              scope: punctuation.separator.c++
-            - match: '='
-              scope: keyword.operator.assignment.c++
-        - match: '\b(appdomain|deprecated|dllimport|dllexport|jintrinsic|naked|noalias|noinline|noreturn|nothrow|novtable|process|restrict|safebuffers|selectany|thread)\b'
-          scope: constant.other.c++
-
-  types-parens:
-    - match: '\b(decltype)\b\s*(\()'
-      captures:
-        1: storage.type.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push:
-        - meta_content_scope: meta.group.c++
-        - match: '\)'
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-        - include: expressions
-
-  keywords-angle-brackets:
-    - match: \b({{casts}})\b\s*
-      scope: keyword.operator.word.cast.c++
-      push:
-        - match: '>'
-          scope: punctuation.section.generic.end.c++
-          pop: true
-        - match: '<'
-          scope: punctuation.section.generic.begin.c++
-          push:
-            - match: '(?=>)'
-              pop: true
-            - include: expressions-minus-generic-type-function-call
-
-  keywords-parens:
-    - match: '\b(alignof|typeid|static_assert|sizeof)\b\s*(\()'
-      captures:
-        1: keyword.operator.word.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push:
-        - meta_content_scope: meta.group.c++
-        - match: '\)'
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-        - include: expressions
-
-  namespace:
-    - match: '\b(using)\s+(namespace)\s+(?={{path_lookahead}})'
-      captures:
-        1: keyword.control.c++
-        2: keyword.control.c++
-      push:
-        - include: identifiers
-        - match: ''
-          pop: true
-    - match: '\b(namespace)\s+(?=({{path_lookahead}})?(?!\s*[;,]))'
-      scope: meta.namespace.c++
-      captures:
-        1: keyword.control.c++
-      push:
-        - meta_content_scope: meta.namespace.c++ entity.name.namespace.c++
-        - include: identifiers
-        - match: ''
-          set:
-            - meta_scope: meta.namespace.c++
-            - include: comments
-            - match: '='
-              scope: keyword.operator.alias.c++
-            - match: '(?=;)'
-              pop: true
-            - match: '\}'
-              scope: meta.block.c++ punctuation.section.block.end.c++
-              pop: true
-            - match: '\{'
-              scope: punctuation.section.block.begin.c++
-              push:
-                - meta_scope: meta.block.c++
-                - match: '(?=\})'
-                  pop: true
-                - include: preprocessor-global
-                - include: global
-            - include: expressions
-
-  template-common:
-    # Exit the template scope if we hit some basic invalid characters. This
-    # helps when a user is in the middle of typing their template types and
-    # prevents re-highlighting the whole file until the next > is found.
-    - match: (?=[{};])
-      pop: true
-    - include: expressions
-
-  template:
-    - match: \btemplate\b
-      scope: storage.type.template.c++
-      push:
-        - meta_scope: meta.template.c++
-        # Explicitly include comments here at the top, in order to NOT match the
-        # \S lookahead in the case of comments.
-        - include: comments
-        - match: <
-          scope: punctuation.section.generic.begin.c++
-          set:
-            - meta_content_scope: meta.template.c++
-            - match: '>'
-              scope: meta.template.c++ punctuation.section.generic.end.c++
-              pop: true
-            - match: \.{3}
-              scope: keyword.operator.variadic.c++
-            - match: \b(typename|{{before_tag}})\b
-              scope: storage.type.c++
-            - include: template # include template here for nested templates
-            - include: template-common
-        - match: (?=\S)
-          set:
-            - meta_content_scope: meta.template.c++
-            - match: \b({{before_tag}})\b
-              scope: storage.type.c++
-            - include: template-common
-
-  generic-type:
-    - match: '(?=(?!template){{path_lookahead}}\s*{{generic_lookahead}}\s*\()'
-      push:
-        - meta_scope: meta.function-call.c++
-        - match: \btemplate\b
-          scope: storage.type.template.c++
-        - match: '(?:(::)\s*)?{{identifier}}\s*(::)\s*'
-          captures:
-            1: punctuation.accessor.double-colon.c++
-            2: punctuation.accessor.double-colon.c++
-        - match: (?:(::)\s*)?({{identifier}})\s*(<)
-          captures:
-            1: punctuation.accessor.double-colon.c++
-            2: variable.function.c++
-            3: punctuation.section.generic.begin.c++
-          push:
-            - match: '>'
-              scope: punctuation.section.generic.end.c++
-              pop: true
-            - include: expressions-minus-generic-type-function-call
-        - match: (?:(::)\s*)?({{identifier}})\s*(\()
-          captures:
-            1: punctuation.accessor.double-colon.c++
-            2: variable.function.c++
-            3: punctuation.section.group.begin.c++
-          set:
-            - meta_scope: meta.function-call.c++
-            - meta_content_scope: meta.group.c++
-            - match: '\)'
-              scope: meta.group.c++ punctuation.section.group.end.c++
-              pop: true
-            - include: expressions
-        - include: angle-brackets
-        - match: '\('
-          scope: meta.group.c++ punctuation.section.group.begin.c++
-          set:
-            - meta_scope: meta.function-call.c++
-            - meta_content_scope: meta.group.c++
-            - match: '\)'
-              scope: meta.group.c++ punctuation.section.group.end.c++
-              pop: true
-            - include: expressions
-    - match: '(?=(?!template){{path_lookahead}}\s*{{generic_lookahead}})'
-      push:
-        - include: identifiers
-        - match: '<'
-          scope: punctuation.section.generic.begin.c++
-          set:
-            - match: '>'
-              scope: punctuation.section.generic.end.c++
-              pop: true
-            - include: expressions-minus-generic-type-function-call
-
-  angle-brackets:
-    - match: '<(?!<)'
-      scope: punctuation.section.generic.begin.c++
-      push:
-        - match: '>'
-          scope: punctuation.section.generic.end.c++
-          pop: true
-        - include: expressions-minus-generic-type-function-call
-
-  block:
-    - match: '\{'
-      scope: punctuation.section.block.begin.c++
-      push:
-        - meta_scope: meta.block.c++
-        - match: (?=^\s*#\s*(elif|else|endif)\b)
-          pop: true
-        - match: '\}'
-          scope: punctuation.section.block.end.c++
-          pop: true
-        - include: statements
-
-  function-call:
-    - match: (?={{path_lookahead}}\s*\()
-      push:
-        - meta_scope: meta.function-call.c++
-        - include: scope:source.c#c99
-        - match: '(?:(::)\s*)?{{identifier}}\s*(::)\s*'
-          scope: variable.function.c++
-          captures:
-            1: punctuation.accessor.c++
-            2: punctuation.accessor.c++
-        - match: '(?:(::)\s*)?{{identifier}}'
-          scope: variable.function.c++
-          captures:
-            1: punctuation.accessor.c++
-        - match: '\('
-          scope: meta.group.c++ punctuation.section.group.begin.c++
-          set:
-            - meta_content_scope: meta.function-call.c++ meta.group.c++
-            - match: '\)'
-              scope: meta.function-call.c++ meta.group.c++ punctuation.section.group.end.c++
-              pop: true
-            - include: expressions
-
-  members-inside-function-call:
-    - meta_content_scope: meta.method-call.c++ meta.group.c++
-    - match: \)
-      scope: meta.method-call.c++ meta.group.c++ punctuation.section.group.end.c++
-      pop: true
-    - include: expressions
-
-  members-after-accessor-junction:
-    # After we've seen an accessor (dot or arrow), this context decides what
-    # kind of entity we're accessing.
-    - include: comments
-    - match: \btemplate\b
-      scope: meta.method-call.c++ storage.type.template.c++
-      # Guaranteed to be a template member function call after we match this
-      set:
-        - meta_content_scope: meta.method-call.c++
-        - include: comments
-        - match: '{{identifier}}'
-          scope: variable.function.member.c++
-          set:
-            - meta_content_scope: meta.method-call.c++
-            - match: \(
-              scope: meta.group.c++ punctuation.section.group.begin.c++
-              set: members-inside-function-call
-            - include: comments
-            - include: angle-brackets
-            - match: (?=\S) # safety pop
-              pop: true
-        - match: (?=\S) # safety pop
-          pop: true
-    # Operator overloading
-    - match: '({{operator_method_name}})\s*(\()'
-      captures:
-        0: meta.method-call.c++
-        1: variable.function.member.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      set: members-inside-function-call
-    # Non-templated member function call
-    - match: (~?{{identifier}})\s*(\()
-      captures:
-        0: meta.method-call.c++
-        1: variable.function.member.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      set: members-inside-function-call
-    # Templated member function call
-    - match: (~?{{identifier}})\s*(?={{generic_lookahead}})
-      captures:
-        1: variable.function.member.c++
-      set:
-        - meta_scope: meta.method-call.c++
-        - match: <
-          scope: punctuation.section.generic.begin.c++
-          set:
-            - meta_content_scope: meta.method-call.c++
-            - match: '>'
-              scope: punctuation.section.generic.end.c++
-              set:
-                - meta_content_scope: meta.method-call.c++
-                - include: comments
-                - match: \(
-                  scope: punctuation.section.group.begin.c++
-                  set: members-inside-function-call
-                - match: (?=\S) # safety pop
-                  pop: true
-            - include: expressions
-    # Explicit base-class access
-    - match: ({{identifier}})\s*(::)
-      captures:
-        1: variable.other.base-class.c++
-        2: punctuation.accessor.double-colon.c++
-      set: members-after-accessor-junction # reset
-    # Just a regular member variable
-    - match: '{{identifier}}'
-      scope: variable.other.readwrite.member.c++
-      pop: true
-
-  members-dot:
-    - include: scope:source.c#access-illegal
-    # No lookahead required because members-dot goes after operators in the
-    # early-expressions-after-generic-type context. This means triple dots
-    # (i.e. "..." or "variadic") is attempted first.
-    - match: \.
-      scope: punctuation.accessor.dot.c++
-      push: members-after-accessor-junction
-
-  members-arrow:
-    # This needs to be before operators in the
-    # early-expressions-after-generic-type context because otherwise the "->"
-    # from the C language will match.
-    - match: ->
-      scope: punctuation.accessor.arrow.c++
-      push: members-after-accessor-junction
-
-  typedef:
-    - match: \btypedef\b
-      scope: storage.type.c++
-      push:
-        - match: ({{identifier}})?\s*(?=;)
-          captures:
-            1: entity.name.type.typedef.c++
-          pop: true
-        - match: \b(struct)\s+({{identifier}})\b
-          captures:
-            1: storage.type.c++
-        - include: expressions-minus-generic-type
-
-  parens:
-    - match: \(
-      scope: punctuation.section.group.begin.c++
-      push:
-        - meta_scope: meta.group.c++
-        - match: \)
-          scope: punctuation.section.group.end.c++
-          pop: true
-        - include: expressions
-
-  brackets:
-    - match: \[
-      scope: punctuation.section.brackets.begin.c++
-      push:
-        - meta_scope: meta.brackets.c++
-        - match: \]
-          scope: punctuation.section.brackets.end.c++
-          pop: true
-        - include: expressions
-
-  function-trailing-return-type:
-    - match: '{{non_angle_brackets}}'
-      pop: true
-    - include: angle-brackets
-    - include: types
-    - include: modifiers-parens
-    - include: modifiers
-    - include: identifiers
-    - match: \*|&
-      scope: keyword.operator.c++
-    - include: function-trailing-return-type-parens
-    - match: '(?=\S)'
-      pop: true
-
-  function-trailing-return-type-parens:
-    - match: \(
-      scope: punctuation.section.group.begin.c++
-      push:
-        - meta_scope: meta.group.c++
-        - match: \)
-          scope: punctuation.section.group.end.c++
-          pop: true
-        - include: function-trailing-return-type
-
-  ## Detection of function and data structure definitions at the global level
-
-  global-modifier:
-    - include: comments
-    - include: modifiers-parens
-    - include: modifiers
-    # Constructors and destructors don't have a type
-    - match: '(?={{path_lookahead}}\s*::\s*{{identifier}}\s*(\(|$))'
-      set:
-        - meta_content_scope: meta.function.c++ entity.name.function.constructor.c++
-        - include: identifiers
-        - match: '(?=[^\w\s])'
-          set: function-definition-params
-    - match: '(?={{path_lookahead}}\s*::\s*~{{identifier}}\s*(\(|$))'
-      set:
-        - meta_content_scope: meta.function.c++ entity.name.function.destructor.c++
-        - include: identifiers
-        - match: '~{{identifier}}'
-        - match: '(?=[^\w\s])'
-          set: function-definition-params
-    # If we see a path ending in :: before a newline, we don't know if it is
-    # a constructor or destructor, or a long return type, so we are just going
-    # to treat it like a regular function. Most likely it is a constructor,
-    # since it doesn't seem most developers would create such a long typename.
-    - match: '(?={{path_lookahead}}\s*::\s*$)'
-      set:
-        - meta_content_scope: meta.function.c++ entity.name.function.c++
-        - include: identifiers
-        - match: '~{{identifier}}'
-        - match: '(?=[^\w\s])'
-          set: function-definition-params
-    - include: unique-strings
-    - match: '(?=\S)'
-      set: global-type
-
-  global-type:
-    - include: comments
-    - match: \*|&
-      scope: keyword.operator.c++
-    - match: '(?=\b({{control_keywords}}|{{operator_keywords}}|{{casts}}|{{memory_operators}}|{{other_keywords}}|operator)\b)'
-      pop: true
-    - match: '(?=\s)'
-      set: global-maybe-function
-    # If a class/struct/enum followed by a name that is not a macro or declspec
-    # then this is likely a return type of a function. This is uncommon.
-    - match: |-
-        (?x:
-          ({{before_tag}})
-          \s+
-          (?=
-            (?![[:upper:][:digit:]_]+\b|__declspec|{{before_tag}})
-            {{path_lookahead}}
-            (\s+{{identifier}}\s*\(|\s*[*&])
-          )
-        )
-      captures:
-        1: storage.type.c++
-      set:
-        - include: identifiers
-        - match: ''
-          set: global-maybe-function
-    # The previous match handles return types of struct/enum/etc from a func,
-    # there this one exits the context to allow matching an actual struct/class
-    - match: '(?=\b({{before_tag}})\b)'
-      set: data-structures
-    - match: '(?=\b({{casts}})\b\s*<)'
-      pop: true
-    - match: '{{non_angle_brackets}}'
-      pop: true
-    - include: angle-brackets
-    - include: types
-    # Allow a macro call
-    - match: '({{identifier}})\s*(\()(?=[^\)]+\))'
-      captures:
-        1: variable.function.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push:
-        - meta_scope: meta.function-call.c++
-        - meta_content_scope: meta.group.c++
-        - match: '\)'
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-        - include: expressions
-    - match: '(?={{path_lookahead}}\s*\()'
-      set:
-        - include: function-call
-        - match: ''
-          pop: true
-    - include: variables
-    - include: constants
-    - include: identifiers
-    - match: (?=\W)
-      pop: true
-
-  global-maybe-function:
-    - include: comments
-    # Consume pointer info, macros and any type info that was offset by macros
-    - match: \*|&
-      scope: keyword.operator.c++
-    - match: '(?=\b({{control_keywords}}|{{operator_keywords}}|{{casts}}|{{memory_operators}}|{{other_keywords}})\b)'
-      pop: true
-    - match: '\b({{type_qualifier}})\b'
-      scope: storage.modifier.c++
-    - match: '{{non_angle_brackets}}'
-      pop: true
-    - include: angle-brackets
-    - include: types
-    - include: modifiers-parens
-    - include: modifiers
-    # All uppercase identifier just before a newline is most likely a macro
-    - match: '[[:upper:][:digit:]_]+\s*$'
-    # Operator overloading
-    - match: '(?=({{path_lookahead}}\s*(?:{{generic_lookahead}})?::\s*)?{{operator_method_name}}\s*(\(|$))'
-      set:
-        - meta_content_scope: meta.function.c++ entity.name.function.c++
-        - include: identifiers
-        - match: '(?=\s*(\(|$))'
-          set: function-definition-params
-    # Identifier that is not the function name - likely a macro or type
-    - match: '(?={{path_lookahead}}([ \t]+|[*&])(?!\s*(<|::|\(|$)))'
-      push:
-        - include: identifiers
-        - match: ''
-          pop: true
-    # Real function definition
-    - match: '(?={{path_lookahead}}({{generic_lookahead}}({{path_lookahead}})?)\s*(\(|$))'
-      set: [function-definition-params, global-function-identifier-generic]
-    - match: '(?={{path_lookahead}}\s*(\(|$))'
-      set: [function-definition-params, global-function-identifier]
-    - match: '(?={{path_lookahead}}\s*::\s*$)'
-      set: [function-definition-params, global-function-identifier]
-    - match: '(?=\S)'
-      pop: true
-
-  global-function-identifier-generic:
-    - include: angle-brackets
-    - match: '::'
-      scope: punctuation.accessor.c++
-    - match: '(?={{identifier}}<.*>\s*\()'
-      push:
-        - meta_content_scope: entity.name.function.c++
-        - include: identifiers
-        - match: '(?=<)'
-          pop: true
-    - match: '(?={{identifier}}\s*\()'
-      push:
-        - meta_content_scope: entity.name.function.c++
-        - include: identifiers
-        - match: ''
-          pop: true
-    - match: '(?=\()'
-      pop: true
-
-  global-function-identifier:
-    - meta_content_scope: entity.name.function.c++
-    - include: identifiers
-    - match: '(?=\S)'
-      pop: true
-
-  function-definition-params:
-    - meta_content_scope: meta.function.c++
-    - include: comments
-    - match: '(?=\()'
-      set:
-        - match: \(
-          scope: meta.function.parameters.c++ meta.group.c++ punctuation.section.group.begin.c++
-          set:
-            - meta_content_scope: meta.function.parameters.c++ meta.group.c++
-            - match : \)
-              scope: punctuation.section.group.end.c++
-              set: function-definition-continue
-            - match: '\bvoid\b'
-              scope: storage.type.c++
-            - match: '{{identifier}}(?=\s*(\[|,|\)|=))'
-              scope: variable.parameter.c++
-            - match: '='
-              scope: keyword.operator.assignment.c++
-              push:
-                - match: '(?=,|\))'
-                  pop: true
-                - include: expressions-minus-generic-type
-                - include: scope:source.c#preprocessor-line-continuation
-            - include: expressions-minus-generic-type
-            - include: scope:source.c#preprocessor-line-continuation
-    - match: (?=\S)
-      pop: true
-
-  function-definition-continue:
-    - meta_content_scope: meta.function.c++
-    - include: comments
-    - match: '(?=;)'
-      pop: true
-    - match: '->'
-      scope: punctuation.separator.c++
-      set: function-definition-trailing-return
-    - include: function-specifiers
-    - match: '='
-      scope: keyword.operator.assignment.c++
-    - match: '&'
-      scope: keyword.operator.c++
-    - match: \b0\b
-      scope: constant.numeric.c++
-    - match: \b(default|delete)\b
-      scope: storage.modifier.c++
-    - match: '(?=\{)'
-      set: function-definition-body
-    - match: '(?=\S)'
-      pop: true
-
-  function-definition-trailing-return:
-    - include: comments
-    - match: '(?=;)'
-      pop: true
-    - match: '(?=\{)'
-      set: function-definition-body
-    - include: function-specifiers
-    - include: function-trailing-return-type
-
-  function-definition-body:
-    - meta_content_scope: meta.function.c++ meta.block.c++
-    - match: '\{'
-      scope: punctuation.section.block.begin.c++
-      set:
-        - meta_content_scope: meta.function.c++ meta.block.c++
-        - match: '\}'
-          scope: meta.function.c++ meta.block.c++ punctuation.section.block.end.c++
-          pop: true
-        - match: (?=^\s*#\s*(elif|else|endif)\b)
-          pop: true
-        - match: '(?=({{before_tag}})([^(;]+$|.*\{))'
-          push: data-structures
-        - include: statements
-
-  ## Data structures including classes, structs, unions and enums
-
-  data-structures:
-    - match: '\bclass\b'
-      scope: storage.type.c++
-      set: data-structures-class-definition
-    # Detect variable type definitions using struct/enum/union followed by a tag
-    - match: '\b({{before_tag}})(?=\s+{{path_lookahead}}\s+{{path_lookahead}}\s*[=;\[])'
-      scope: storage.type.c++
-    - match: '\bstruct\b'
-      scope: storage.type.c++
-      set: data-structures-struct-definition
-    - match: '\benum(\s+(class|struct))?\b'
-      scope: storage.type.c++
-      set: data-structures-enum-definition
-    - match: '\bunion\b'
-      scope: storage.type.c++
-      set: data-structures-union-definition
-    - match: '(?=\S)'
-      pop: true
-
-  preprocessor-workaround-eat-macro-before-identifier:
-    # Handle macros so they aren't matched as the class name
-    - match: ({{macro_identifier}})(?=\s+~?{{identifier}})
-      captures:
-        1: meta.assumed-macro.c
-
-  data-structures-class-definition:
-    - meta_scope: meta.class.c++
-    - include: data-structures-definition-common-begin
-    - match: '{{identifier}}(?={{data_structures_forward_decl_lookahead}})'
-      scope: entity.name.class.forward-decl.c++
-      set: data-structures-class-definition-after-identifier
-    - match: '{{identifier}}'
-      scope: entity.name.class.c++
-      set: data-structures-class-definition-after-identifier
-    - match: '(?=[:{])'
-      set: data-structures-class-definition-after-identifier
-    - match: '(?=;)'
-      pop: true
-
-  data-structures-class-definition-after-identifier:
-    - meta_content_scope: meta.class.c++
-    - include: data-structures-definition-common-begin
-    # No matching of identifiers since they should all be macros at this point
-    - include: data-structures-definition-common-end
-    - match: '\{'
-      scope: meta.block.c++ punctuation.section.block.begin.c++
-      set:
-        - meta_content_scope: meta.class.c++ meta.block.c++
-        - match: '\}'
-          scope: meta.class.c++ meta.block.c++ punctuation.section.block.end.c++
-          pop: true
-        - include: data-structures-body
-
-  data-structures-struct-definition:
-    - meta_scope: meta.struct.c++
-    - include: data-structures-definition-common-begin
-    - match: '{{identifier}}(?={{data_structures_forward_decl_lookahead}})'
-      scope: entity.name.struct.forward-decl.c++
-      set: data-structures-struct-definition-after-identifier
-    - match: '{{identifier}}'
-      scope: entity.name.struct.c++
-      set: data-structures-struct-definition-after-identifier
-    - match: '(?=[:{])'
-      set: data-structures-struct-definition-after-identifier
-    - match: '(?=;)'
-      pop: true
-
-  data-structures-struct-definition-after-identifier:
-    - meta_content_scope: meta.struct.c++
-    - include: data-structures-definition-common-begin
-    # No matching of identifiers since they should all be macros at this point
-    - include: data-structures-definition-common-end
-    - match: '\{'
-      scope: meta.block.c++ punctuation.section.block.begin.c++
-      set:
-        - meta_content_scope: meta.struct.c++ meta.block.c++
-        - match: '\}'
-          scope: meta.struct.c++ meta.block.c++ punctuation.section.block.end.c++
-          pop: true
-        - include: data-structures-body
-
-  data-structures-enum-definition:
-    - meta_scope: meta.enum.c++
-    - include: data-structures-definition-common-begin
-    - match: '{{identifier}}(?={{data_structures_forward_decl_lookahead}})'
-      scope: entity.name.enum.forward-decl.c++
-      set: data-structures-enum-definition-after-identifier
-    - match: '{{identifier}}'
-      scope: entity.name.enum.c++
-      set: data-structures-enum-definition-after-identifier
-    - match: '(?=[:{])'
-      set: data-structures-enum-definition-after-identifier
-    - match: '(?=;)'
-      pop: true
-
-  data-structures-enum-definition-after-identifier:
-    - meta_content_scope: meta.enum.c++
-    - include: data-structures-definition-common-begin
-    # No matching of identifiers since they should all be macros at this point
-    - include: data-structures-definition-common-end
-    - match: '\{'
-      scope: meta.block.c++ punctuation.section.block.begin.c++
-      set:
-        - meta_content_scope: meta.enum.c++ meta.block.c++
-        # Enums don't support methods so we have a simplified body
-        - match: '\}'
-          scope: meta.enum.c++ meta.block.c++ punctuation.section.block.end.c++
-          pop: true
-        - include: statements
-
-  data-structures-union-definition:
-    - meta_scope: meta.union.c++
-    - include: data-structures-definition-common-begin
-    - match: '{{identifier}}(?={{data_structures_forward_decl_lookahead}})'
-      scope: entity.name.union.forward-decl.c++
-      set: data-structures-union-definition-after-identifier
-    - match: '{{identifier}}'
-      scope: entity.name.union.c++
-      set: data-structures-union-definition-after-identifier
-    - match: '(?=[{])'
-      set: data-structures-union-definition-after-identifier
-    - match: '(?=;)'
-      pop: true
-
-  data-structures-union-definition-after-identifier:
-    - meta_content_scope: meta.union.c++
-    - include: data-structures-definition-common-begin
-    # No matching of identifiers since they should all be macros at this point
-    # Unions don't support base classes
-    - include: angle-brackets
-    - match: '\{'
-      scope: meta.block.c++ punctuation.section.block.begin.c++
-      set:
-        - meta_content_scope: meta.union.c++ meta.block.c++
-        - match: '\}'
-          scope: meta.union.c++ meta.block.c++ punctuation.section.block.end.c++
-          pop: true
-        - include: data-structures-body
-    - match: '(?=;)'
-      pop: true
-
-  data-structures-definition-common-begin:
-    - include: comments
-    - match: '(?=\b(?:{{before_tag}}|{{control_keywords}})\b)'
-      pop: true
-    - include: preprocessor-other
-    - include: modifiers-parens
-    - include: modifiers
-    - include: preprocessor-workaround-eat-macro-before-identifier
-
-  data-structures-definition-common-end:
-    - include: angle-brackets
-    - match: \bfinal\b
-      scope: storage.modifier.c++
-    - match: ':'
-      scope: punctuation.separator.c++
-      push:
-        - include: comments
-        - include: preprocessor-other
-        - include: modifiers-parens
-        - include: modifiers
-        - match: '\b(virtual|{{visibility_modifiers}})\b'
-          scope: storage.modifier.c++
-        - match: (?={{path_lookahead}})
-          push:
-            - meta_scope: entity.other.inherited-class.c++
-            - include: identifiers
-            - match: ''
-              pop: true
-        - include: angle-brackets
-        - match: ','
-          scope: punctuation.separator.c++
-        - match: (?=\{|;)
-          pop: true
-    - match: '(?=;)'
-      pop: true
-
-  data-structures-body:
-    - include: preprocessor-data-structures
-    - match: '(?=\btemplate\b)'
-      push:
-        - include: template
-        - match: (?=\S)
-          set: data-structures-modifier
-    - include: typedef
-    - match: \b({{visibility_modifiers}})\s*(:)(?!:)
-      captures:
-        1: storage.modifier.c++
-        2: punctuation.section.class.c++
-    - match: '^\s*(?=(?:~?\w+|::))'
-      push: data-structures-modifier
-    - include: expressions-minus-generic-type
-
-  data-structures-modifier:
-    - match: '\bfriend\b'
-      scope: storage.modifier.c++
-      push:
-        - match: (?=;)
-          pop: true
-        - match: '\{'
-          scope: punctuation.section.block.begin.c++
-          set:
-            - meta_scope: meta.block.c++
-            - match: '\}'
-              scope: punctuation.section.block.end.c++
-              pop: true
-            - include: statements
-        - match: '\b({{before_tag}})\b'
-          scope: storage.type.c++
-        - include: expressions-minus-function-call
-    - include: comments
-    - include: modifiers-parens
-    - include: modifiers
-    - match: '\bstatic_assert(?=\s*\()'
-      scope: meta.static-assert.c++ keyword.operator.word.c++
-      push:
-        - match: '\('
-          scope: meta.group.c++ punctuation.section.group.begin.c++
-          set:
-            - meta_content_scope: meta.function-call.c++ meta.group.c++
-            - match: '\)'
-              scope: meta.function-call.c++ meta.group.c++ punctuation.section.group.end.c++
-              pop: true
-            - include: expressions
-    # Destructor
-    - match: '(?:{{identifier}}\s*(::)\s*)?~{{identifier}}(?=\s*(\(|$))'
-      scope: meta.method.destructor.c++ entity.name.function.destructor.c++
-      captures:
-        1: punctuation.accessor.c++
-      set: method-definition-params
-    # It's a macro, not a constructor if there is no type in the first param
-    - match: '({{identifier}})\s*(\()(?=\s*(?!void){{identifier}}\s*[),])'
-      captures:
-        1: variable.function.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push:
-        - meta_scope: meta.function-call.c++
-        - meta_content_scope: meta.group.c++
-        - match: '\)'
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-        - include: expressions
-    # Constructor
-    - include: preprocessor-workaround-eat-macro-before-identifier
-    - match: '((?!{{before_tag}}|template){{identifier}})(?=\s*\()'
-      scope: meta.method.constructor.c++ entity.name.function.constructor.c++
-      set: method-definition-params
-    # Long form constructor
-    - match: '({{identifier}}\s*(::)\s*{{identifier}})(?=\s*\()'
-      captures:
-        1: meta.method.constructor.c++ entity.name.function.constructor.c++
-        2: punctuation.accessor.c++
-      push: method-definition-params
-    - match: '(?=\S)'
-      set: data-structures-type
-
-  data-structures-type:
-    - include: comments
-    - match: \*|&
-      scope: keyword.operator.c++
-      # Cast methods
-    - match: '(operator)\s+({{identifier}})(?=\s*(\(|$))'
-      captures:
-        1: keyword.control.c++
-        2: meta.method.c++ entity.name.function.c++
-      set: method-definition-params
-    - match: '(?=\b({{control_keywords}}|{{operator_keywords}}|{{casts}}|{{memory_operators}}|{{other_keywords}}|operator)\b)'
-      pop: true
-    - match: '(?=\s)'
-      set: data-structures-maybe-method
-    # If a class/struct/enum followed by a name that is not a macro or declspec
-    # then this is likely a return type of a function. This is uncommon.
-    - match: |-
-        (?x:
-          ({{before_tag}})
-          \s+
-          (?=
-            (?![[:upper:][:digit:]_]+\b|__declspec|{{before_tag}})
-            {{path_lookahead}}
-            (\s+{{identifier}}\s*\(|\s*[*&])
-          )
-        )
-      captures:
-        1: storage.type.c++
-      set:
-        - include: identifiers
-        - match: ''
-          set: data-structures-maybe-method
-    # The previous match handles return types of struct/enum/etc from a func,
-    # there this one exits the context to allow matching an actual struct/class
-    - match: '(?=\b({{before_tag}})\b)'
-      set: data-structures
-    - match: '(?=\b({{casts}})\b\s*<)'
-      pop: true
-    - match: '{{non_angle_brackets}}'
-      pop: true
-    - include: angle-brackets
-    - include: types
-    - include: variables
-    - include: constants
-    - include: identifiers
-    - match: (?=[&*])
-      set: data-structures-maybe-method
-    - match: (?=\W)
-      pop: true
-
-  data-structures-maybe-method:
-    - include: comments
-    # Consume pointer info, macros and any type info that was offset by macros
-    - match: \*|&
-      scope: keyword.operator.c++
-    - match: '(?=\b({{control_keywords}}|{{operator_keywords}}|{{casts}}|{{memory_operators}}|{{other_keywords}})\b)'
-      pop: true
-    - match: '\b({{type_qualifier}})\b'
-      scope: storage.modifier.c++
-    - match: '{{non_angle_brackets}}'
-      pop: true
-    - include: angle-brackets
-    - include: types
-    - include: modifiers-parens
-    - include: modifiers
-    # Operator overloading
-    - match: '{{operator_method_name}}(?=\s*(\(|$))'
-      scope: meta.method.c++ entity.name.function.c++
-      set: method-definition-params
-    # Identifier that is not the function name - likely a macro or type
-    - match: '(?={{path_lookahead}}([ \t]+|[*&])(?!\s*(<|::|\()))'
-      push:
-        - include: identifiers
-        - match: ''
-          pop: true
-    # Real function definition
-    - match: '(?={{path_lookahead}}({{generic_lookahead}})\s*(\())'
-      set: [method-definition-params, data-structures-function-identifier-generic]
-    - match: '(?={{path_lookahead}}\s*(\())'
-      set: [method-definition-params, data-structures-function-identifier]
-    - match: '(?={{path_lookahead}}\s*::\s*$)'
-      set: [method-definition-params, data-structures-function-identifier]
-    - match: '(?=\S)'
-      pop: true
-
-  data-structures-function-identifier-generic:
-    - include: angle-brackets
-    - match: '(?={{identifier}})'
-      push:
-        - meta_content_scope: entity.name.function.c++
-        - include: identifiers
-        - match: '(?=<)'
-          pop: true
-    - match: '(?=\()'
-      pop: true
-
-  data-structures-function-identifier:
-    - meta_content_scope: entity.name.function.c++
-    - include: identifiers
-    - match: '(?=\S)'
-      pop: true
-
-  method-definition-params:
-    - meta_content_scope: meta.method.c++
-    - include: comments
-    - match: '(?=\()'
-      set:
-        - match: \(
-          scope: meta.method.parameters.c++ meta.group.c++ punctuation.section.group.begin.c++
-          set:
-            - meta_content_scope: meta.method.parameters.c++ meta.group.c++
-            - match : \)
-              scope: punctuation.section.group.end.c++
-              set: method-definition-continue
-            - match: '\bvoid\b'
-              scope: storage.type.c++
-            - match: '{{identifier}}(?=\s*(\[|,|\)|=))'
-              scope: variable.parameter.c++
-            - match: '='
-              scope: keyword.operator.assignment.c++
-              push:
-                - match: '(?=,|\))'
-                  pop: true
-                - include: expressions-minus-generic-type
-            - include: expressions-minus-generic-type
-    - match: '(?=\S)'
-      pop: true
-
-  method-definition-continue:
-    - meta_content_scope: meta.method.c++
-    - include: comments
-    - match: '(?=;)'
-      pop: true
-    - match: '->'
-      scope: punctuation.separator.c++
-      set: method-definition-trailing-return
-    - include: function-specifiers
-    - match: '='
-      scope: keyword.operator.assignment.c++
-    - match: '&'
-      scope: keyword.operator.c++
-    - match: \b0\b
-      scope: constant.numeric.c++
-    - match: \b(default|delete)\b
-      scope: storage.modifier.c++
-    - match: '(?=:)'
-      set:
-        - match: ':'
-          scope: punctuation.separator.initializer-list.c++
-          set:
-            - meta_scope: meta.method.constructor.initializer-list.c++
-            - match: '{{identifier}}'
-              scope: variable.other.readwrite.member.c++
-              push:
-                - match: \(
-                  scope: meta.group.c++ punctuation.section.group.begin.c++
-                  set:
-                    - meta_content_scope: meta.group.c++
-                    - match: \)
-                      scope: meta.group.c++ punctuation.section.group.end.c++
-                      pop: true
-                    - include: expressions
-                - match: \{
-                  scope: meta.group.c++ punctuation.section.group.begin.c++
-                  set:
-                    - meta_content_scope: meta.group.c++
-                    - match: \}
-                      scope: meta.group.c++ punctuation.section.group.end.c++
-                      pop: true
-                    - include: expressions
-                - include: comments
-            - match: (?=\{|;)
-              set: method-definition-continue
-            - include: expressions
-    - match: '(?=\{)'
-      set: method-definition-body
-    - match: '(?=\S)'
-      pop: true
-
-  method-definition-trailing-return:
-    - include: comments
-    - match: '(?=;)'
-      pop: true
-    - match: '(?=\{)'
-      set: method-definition-body
-    - include: function-specifiers
-    - include: function-trailing-return-type
-
-  method-definition-body:
-    - meta_content_scope: meta.method.c++ meta.block.c++
-    - match: '\{'
-      scope: punctuation.section.block.begin.c++
-      set:
-        - meta_content_scope: meta.method.c++ meta.block.c++
-        - match: '\}'
-          scope: meta.method.c++ meta.block.c++ punctuation.section.block.end.c++
-          pop: true
-        - match: (?=^\s*#\s*(elif|else|endif)\b)
-          pop: true
-        - match: '(?=({{before_tag}})([^(;]+$|.*\{))'
-          push: data-structures
-        - include: statements
-
-  ## Preprocessor for data-structures
-
-  preprocessor-data-structures:
-    - include: preprocessor-rule-enabled-data-structures
-    - include: preprocessor-rule-disabled-data-structures
-    - include: preprocessor-practical-workarounds
-
-  preprocessor-rule-disabled-data-structures:
-    - match: ^\s*((#if)\s+(0))\b
-      captures:
-        1: meta.preprocessor.c++
-        2: keyword.control.import.c++
-        3: constant.numeric.preprocessor.c++
-      push:
-        - match: ^\s*(#\s*endif)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.c++
-          pop: true
-        - match: ^\s*(#\s*else)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.else.c++
-          push:
-            - match: (?=^\s*#\s*endif\b)
-              pop: true
-            - include: negated-block
-            - include: data-structures-body
-        - match: ""
-          push:
-            - meta_scope: comment.block.preprocessor.if-branch.c++
-            - match: (?=^\s*#\s*(else|endif)\b)
-              pop: true
-            - include: scope:source.c#preprocessor-disabled
-
-  preprocessor-rule-enabled-data-structures:
-    - match: ^\s*((#if)\s+(0*1))\b
-      captures:
-        1: meta.preprocessor.c++
-        2: keyword.control.import.c++
-        3: constant.numeric.preprocessor.c++
-      push:
-        - match: ^\s*(#\s*endif)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.c++
-          pop: true
-        - match: ^\s*(#\s*else)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.else.c++
-          push:
-            - meta_content_scope: comment.block.preprocessor.else-branch.c++
-            - match: (?=^\s*#\s*endif\b)
-              pop: true
-            - include: scope:source.c#preprocessor-disabled
-        - match: ""
-          push:
-            - match: (?=^\s*#\s*(else|endif)\b)
-              pop: true
-            - include: negated-block
-            - include: data-structures-body
-
-  ## Preprocessor for global
-
-  preprocessor-global:
-    - include: preprocessor-rule-enabled-global
-    - include: preprocessor-rule-disabled-global
-    - include: preprocessor-rule-other-global
-
-  preprocessor-statements:
-    - include: preprocessor-rule-enabled-statements
-    - include: preprocessor-rule-disabled-statements
-    - include: preprocessor-rule-other-statements
-
-  preprocessor-expressions:
-    - include: scope:source.c#incomplete-inc
-    - include: preprocessor-macro-define
-    - include: scope:source.c#pragma-mark
-    - include: preprocessor-other
-
-  preprocessor-rule-disabled-global:
-    - match: ^\s*((#if)\s+(0))\b
-      captures:
-        1: meta.preprocessor.c++
-        2: keyword.control.import.c++
-        3: constant.numeric.preprocessor.c++
-      push:
-        - match: ^\s*(#\s*endif)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.c++
-          pop: true
-        - match: ^\s*(#\s*else)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.else.c++
-          push:
-            - match: (?=^\s*#\s*endif\b)
-              pop: true
-            - include: preprocessor-global
-            - include: negated-block
-            - include: global
-        - match: ""
-          push:
-            - meta_scope: comment.block.preprocessor.if-branch.c++
-            - match: (?=^\s*#\s*(else|endif)\b)
-              pop: true
-            - include: scope:source.c#preprocessor-disabled
-
-  preprocessor-rule-enabled-global:
-    - match: ^\s*((#if)\s+(0*1))\b
-      captures:
-        1: meta.preprocessor.c++
-        2: keyword.control.import.c++
-        3: constant.numeric.preprocessor.c++
-      push:
-        - match: ^\s*(#\s*endif)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.c++
-          pop: true
-        - match: ^\s*(#\s*else)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.else.c++
-          push:
-            - meta_content_scope: comment.block.preprocessor.else-branch.c++
-            - match: (?=^\s*#\s*endif\b)
-              pop: true
-            - include: scope:source.c#preprocessor-disabled
-        - match: ""
-          push:
-            - match: (?=^\s*#\s*(else|endif)\b)
-              pop: true
-            - include: preprocessor-global
-            - include: negated-block
-            - include: global
-
-  preprocessor-rule-other-global:
-    - match: ^\s*(#\s*(?:if|ifdef|ifndef))\b
-      captures:
-        1: keyword.control.import.c++
-      push:
-        - meta_scope: meta.preprocessor.c++
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-comments
-        - match: \bdefined\b
-          scope: keyword.control.c++
-        # Enter a new scope where all elif/else branches have their
-        # contexts popped by a subsequent elif/else/endif. This ensures that
-        # preprocessor branches don't push multiple meta.block scopes on
-        # the stack, thus messing up the "global" context's detection of
-        # functions.
-        - match: $\n
-          set: preprocessor-if-branch-global
-
-  # These gymnastics here ensure that we are properly handling scope even
-  # when the preprocessor is used to create different scope beginnings, such
-  # as a different if/while condition
-  preprocessor-if-branch-global:
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      pop: true
-    - match: (?=^\s*#\s*(elif|else)\b)
-      push: preprocessor-elif-else-branch-global
-    - match: \{
-      scope: punctuation.section.block.begin.c++
-      set: preprocessor-block-if-branch-global
-    - include: preprocessor-global
-    - include: negated-block
-    - include: global
-
-  preprocessor-block-if-branch-global:
-    - meta_scope: meta.block.c++
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      set: preprocessor-block-finish-global
-    - match: (?=^\s*#\s*(elif|else)\b)
-      push: preprocessor-elif-else-branch-global
-    - match: \}
-      scope: punctuation.section.block.end.c++
-      set: preprocessor-if-branch-global
-    - include: statements
-
-  preprocessor-block-finish-global:
-    - meta_scope: meta.block.c++
-    - match: ^\s*(#\s*(?:if|ifdef|ifndef))\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      set: preprocessor-block-finish-if-branch-global
-    - match: \}
-      scope: punctuation.section.block.end.c++
-      pop: true
-    - include: statements
-
-  preprocessor-block-finish-if-branch-global:
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: keyword.control.import.c++
-      pop: true
-    - match: \}
-      scope: punctuation.section.block.end.c++
-      set: preprocessor-if-branch-global
-    - include: statements
-
-  preprocessor-elif-else-branch-global:
-    - match: (?=^\s*#\s*(endif)\b)
-      pop: true
-    - include: preprocessor-global
-    - include: negated-block
-    - include: global
-
-  ## Preprocessor for statements
-
-  preprocessor-rule-disabled-statements:
-    - match: ^\s*((#if)\s+(0))\b
-      captures:
-        1: meta.preprocessor.c++
-        2: keyword.control.import.c++
-        3: constant.numeric.preprocessor.c++
-      push:
-        - match: ^\s*(#\s*endif)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.c++
-          pop: true
-        - match: ^\s*(#\s*else)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.else.c++
-          push:
-            - match: (?=^\s*#\s*endif\b)
-              pop: true
-            - include: negated-block
-            - include: statements
-        - match: ""
-          push:
-            - meta_scope: comment.block.preprocessor.if-branch.c++
-            - match: (?=^\s*#\s*(else|endif)\b)
-              pop: true
-            - include: scope:source.c#preprocessor-disabled
-
-  preprocessor-rule-enabled-statements:
-    - match: ^\s*((#if)\s+(0*1))\b
-      captures:
-        1: meta.preprocessor.c++
-        2: keyword.control.import.c++
-        3: constant.numeric.preprocessor.c++
-      push:
-        - match: ^\s*(#\s*endif)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.c++
-          pop: true
-        - match: ^\s*(#\s*else)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.else.c++
-          push:
-            - meta_content_scope: comment.block.preprocessor.else-branch.c++
-            - match: (?=^\s*#\s*endif\b)
-              pop: true
-            - include: scope:source.c#preprocessor-disabled
-        - match: ""
-          push:
-            - match: (?=^\s*#\s*(else|endif)\b)
-              pop: true
-            - include: negated-block
-            - include: statements
-
-  preprocessor-rule-other-statements:
-    - match: ^\s*(#\s*(?:if|ifdef|ifndef))\b
-      captures:
-        1: keyword.control.import.c++
-      push:
-        - meta_scope: meta.preprocessor.c++
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-comments
-        - match: \bdefined\b
-          scope: keyword.control.c++
-        # Enter a new scope where all elif/else branches have their
-        # contexts popped by a subsequent elif/else/endif. This ensures that
-        # preprocessor branches don't push multiple meta.block scopes on
-        # the stack, thus messing up the "global" context's detection of
-        # functions.
-        - match: $\n
-          set: preprocessor-if-branch-statements
-
-  # These gymnastics here ensure that we are properly handling scope even
-  # when the preprocessor is used to create different scope beginnings, such
-  # as a different if/while condition
-  preprocessor-if-branch-statements:
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      pop: true
-    - match: (?=^\s*#\s*(elif|else)\b)
-      push: preprocessor-elif-else-branch-statements
-    - match: \{
-      scope: punctuation.section.block.begin.c++
-      set: preprocessor-block-if-branch-statements
-    - match: (?=(?!{{non_func_keywords}}){{path_lookahead}}\s*\()
-      set: preprocessor-if-branch-function-call
-    - include: negated-block
-    - include: statements
-
-  preprocessor-if-branch-function-call:
-    - meta_content_scope: meta.function-call.c++
-    - include: scope:source.c#c99
-    - match: '(?:(::)\s*)?{{identifier}}\s*(::)\s*'
-      scope: variable.function.c++
-      captures:
-        1: punctuation.accessor.c++
-        2: punctuation.accessor.c++
-    - match: '(?:(::)\s*)?{{identifier}}'
-      scope: variable.function.c++
-      captures:
-        1: punctuation.accessor.c++
-    - match: '\('
-      scope: meta.group.c++ punctuation.section.group.begin.c++
-      set: preprocessor-if-branch-function-call-arguments
-
-  preprocessor-if-branch-function-call-arguments:
-    - meta_content_scope: meta.function-call.c++ meta.group.c++
-    - match : \)
-      scope: meta.function-call.c++ meta.group.c++ punctuation.section.group.end.c++
-      set: preprocessor-if-branch-statements
-    - match: ^\s*(#\s*(?:elif|else))\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      set: preprocessor-if-branch-statements
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      set: preprocessor-if-branch-function-call-arguments-finish
-    - include: expressions
-
-  preprocessor-if-branch-function-call-arguments-finish:
-    - meta_content_scope: meta.function-call.c++ meta.group.c++
-    - match: \)
-      scope: meta.function-call.c++ meta.group.c++ punctuation.section.group.end.c++
-      pop: true
-    - include: expressions
-
-  preprocessor-block-if-branch-statements:
-    - meta_scope: meta.block.c++
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      set: preprocessor-block-finish-statements
-    - match: (?=^\s*#\s*(elif|else)\b)
-      push: preprocessor-elif-else-branch-statements
-    - match: \}
-      scope: punctuation.section.block.end.c++
-      set: preprocessor-if-branch-statements
-    - include: statements
-
-  preprocessor-block-finish-statements:
-    - meta_scope: meta.block.c++
-    - match: ^\s*(#\s*(?:if|ifdef|ifndef))\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      set: preprocessor-block-finish-if-branch-statements
-    - match: \}
-      scope: punctuation.section.block.end.c++
-      pop: true
-    - include: statements
-
-  preprocessor-block-finish-if-branch-statements:
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: keyword.control.import.c++
-      pop: true
-    - match: \}
-      scope: meta.block.c++ punctuation.section.block.end.c++
-      set: preprocessor-if-branch-statements
-    - include: statements
-
-  preprocessor-elif-else-branch-statements:
-    - match: (?=^\s*#\s*endif\b)
-      pop: true
-    - include: negated-block
-    - include: statements
-
-  ## Preprocessor other
-
-  negated-block:
-    - match: '\}'
-      scope: punctuation.section.block.end.c++
-      push:
-        - match: '\{'
-          scope: punctuation.section.block.begin.c++
-          pop: true
-        - match: (?=^\s*#\s*(elif|else|endif)\b)
-          pop: true
-        - include: statements
-
-  preprocessor-macro-define:
-    - match: ^\s*(\#\s*define)\b
-      captures:
-        1: meta.preprocessor.macro.c++ keyword.control.import.define.c++
-      push:
-        - meta_content_scope: meta.preprocessor.macro.c++
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-line-ending
-        - include: scope:source.c#preprocessor-comments
-        - match: '({{identifier}})(?=\()'
-          scope: entity.name.function.preprocessor.c++
-          set:
-            - match: '\('
-              scope: punctuation.section.group.begin.c++
-              set: preprocessor-macro-params
-        - match: '{{identifier}}'
-          scope: entity.name.constant.preprocessor.c++
-          set: preprocessor-macro-definition
-
-  preprocessor-macro-params:
-    - meta_scope: meta.preprocessor.macro.parameters.c++ meta.group.c++
-    - match: '{{identifier}}'
-      scope: variable.parameter.c++
-    - match: \)
-      scope: punctuation.section.group.end.c++
-      set: preprocessor-macro-definition
-    - match: ','
-      scope: punctuation.separator.c++
-      push:
-        - match: '{{identifier}}'
-          scope: variable.parameter.c++
-          pop: true
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-comments
-        - match: '\.\.\.'
-          scope: keyword.operator.variadic.c++
-        - match: '(?=\))'
-          pop: true
-        - match: (/\*).*(\*/)
-          scope: comment.block.c++
-          captures:
-            1: punctuation.definition.comment.c++
-            2: punctuation.definition.comment.c++
-        - match: '\S+'
-          scope: invalid.illegal.unexpected-character.c++
-    - include: scope:source.c#preprocessor-line-continuation
-    - include: scope:source.c#preprocessor-comments
-    - match: '\.\.\.'
-      scope: keyword.operator.variadic.c++
-    - match: (/\*).*(\*/)
-      scope: comment.block.c++
-      captures:
-        1: punctuation.definition.comment.c++
-        2: punctuation.definition.comment.c++
-    - match: $\n
-      scope: invalid.illegal.unexpected-end-of-line.c++
-
-  preprocessor-macro-definition:
-    - meta_content_scope: meta.preprocessor.macro.c++
-    - include: scope:source.c#preprocessor-line-continuation
-    - include: scope:source.c#preprocessor-line-ending
-    - include: scope:source.c#preprocessor-comments
-    # Don't define blocks in define statements
-    - match: '\{'
-      scope: punctuation.section.block.begin.c++
-    - match: '\}'
-      scope: punctuation.section.block.end.c++
-    - include: expressions
-
-  preprocessor-practical-workarounds:
-    - include: preprocessor-convention-ignore-uppercase-ident-lines
-    - include: scope:source.c#preprocessor-convention-ignore-uppercase-calls-without-semicolon
-
-  preprocessor-convention-ignore-uppercase-ident-lines:
-    - match: ^(\s*{{macro_identifier}})+\s*$
-      scope: meta.assumed-macro.c++
-      push:
-        # It's possible that we are dealing with a function return type on its own line, and the
-        # name of the function is on the subsequent line.
-        - match: '(?={{path_lookahead}}({{generic_lookahead}}({{path_lookahead}})?)\s*\()'
-          set: [function-definition-params, global-function-identifier-generic]
-        - match: '(?={{path_lookahead}}\s*\()'
-          set: [function-definition-params, global-function-identifier]
-        - match: ^
-          pop: true
-
-  preprocessor-other:
-    - match: ^\s*(#\s*(?:if|ifdef|ifndef|elif|else|line|pragma|undef))\b
-      captures:
-        1: keyword.control.import.c++
-      push:
-        - meta_scope: meta.preprocessor.c++
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-line-ending
-        - include: scope:source.c#preprocessor-comments
-        - match: \bdefined\b
-          scope: keyword.control.c++
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-    - match: ^\s*(#\s*(?:error|warning))\b
-      captures:
-        1: keyword.control.import.error.c++
-      push:
-        - meta_scope: meta.preprocessor.diagnostic.c++
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-line-ending
-        - include: scope:source.c#preprocessor-comments
-        - include: strings
-        - match: '\S+'
-          scope: string.unquoted.c++
-    - match: ^\s*(#\s*(?:include|include_next|import))\b
-      captures:
-        1: keyword.control.import.include.c++
-      push:
-        - meta_scope: meta.preprocessor.include.c++
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-line-ending
-        - include: scope:source.c#preprocessor-comments
-        - match: '"'
-          scope: punctuation.definition.string.begin.c++
-          push:
-            - meta_scope: string.quoted.double.include.c++
-            - match: '"'
-              scope: punctuation.definition.string.end.c++
-              pop: true
-        - match: <
-          scope: punctuation.definition.string.begin.c++
-          push:
-            - meta_scope: string.quoted.other.lt-gt.include.c++
-            - match: '>'
-              scope: punctuation.definition.string.end.c++
-              pop: true
-    - include: preprocessor-practical-workarounds
diff --git a/3rdparty/fmt/support/README b/3rdparty/fmt/support/README
deleted file mode 100644
index 468f5485..00000000
--- a/3rdparty/fmt/support/README
+++ /dev/null
@@ -1,4 +0,0 @@
-This directory contains build support files such as
-
-* CMake modules
-* Build scripts
diff --git a/3rdparty/fmt/support/Vagrantfile b/3rdparty/fmt/support/Vagrantfile
deleted file mode 100644
index f6b5f936..00000000
--- a/3rdparty/fmt/support/Vagrantfile
+++ /dev/null
@@ -1,20 +0,0 @@
-# -*- mode: ruby -*-
-# vi: set ft=ruby :
-
-# A vagrant config for testing against gcc-4.8.
-Vagrant.configure("2") do |config|
-  config.vm.box = "ubuntu/xenial64"
-  config.disksize.size = '15GB'
-
-  config.vm.provider "virtualbox" do |vb|
-    vb.memory = "4096"
-  end
-
-  config.vm.provision "shell", inline: <<-SHELL
-    apt-get update
-    apt-get install -y g++ make wget git
-    wget -q https://github.com/Kitware/CMake/releases/download/v3.14.4/cmake-3.14.4-Linux-x86_64.tar.gz
-    tar xzf cmake-3.14.4-Linux-x86_64.tar.gz
-    ln -s `pwd`/cmake-3.14.4-Linux-x86_64/bin/cmake /usr/local/bin
-  SHELL
-end
diff --git a/3rdparty/fmt/support/appveyor-build.py b/3rdparty/fmt/support/appveyor-build.py
deleted file mode 100644
index 65446103..00000000
--- a/3rdparty/fmt/support/appveyor-build.py
+++ /dev/null
@@ -1,43 +0,0 @@
-#!/usr/bin/env python
-# Build the project on AppVeyor.
-
-import os
-from subprocess import check_call
-
-build = os.environ['BUILD']
-config = os.environ['CONFIGURATION']
-platform = os.environ['PLATFORM']
-path = os.environ['PATH']
-image = os.environ['APPVEYOR_BUILD_WORKER_IMAGE']
-jobid = os.environ['APPVEYOR_JOB_ID']
-cmake_command = ['cmake', '-DFMT_PEDANTIC=ON', '-DCMAKE_BUILD_TYPE=' + config, '..']
-if build == 'mingw':
-    cmake_command.append('-GMinGW Makefiles')
-    build_command = ['mingw32-make', '-j4']
-    test_command = ['mingw32-make', 'test']
-    # Remove the path to Git bin directory from $PATH because it breaks
-    # MinGW config.
-    path = path.replace(r'C:\Program Files (x86)\Git\bin', '')
-    os.environ['PATH'] = r'C:\MinGW\bin;' + path
-else:
-    # Add MSBuild 14.0 to PATH as described in
-    # http://help.appveyor.com/discussions/problems/2229-v140-not-found-on-vs2105rc.
-    os.environ['PATH'] = r'C:\Program Files (x86)\MSBuild\15.0\Bin;' + path
-    if image == 'Visual Studio 2019':
-        generator = 'Visual Studio 16 2019'
-        if platform == 'x64':
-            cmake_command.extend(['-A', 'x64'])
-    else:
-        if image == 'Visual Studio 2015':
-            generator = 'Visual Studio 14 2015'
-        elif image == 'Visual Studio 2017':
-            generator = 'Visual Studio 15 2017'
-        if platform == 'x64':
-            generator += ' Win64'
-    cmake_command.append('-G' + generator)
-    build_command = ['cmake', '--build', '.', '--config', config, '--', '/m:4']
-    test_command = ['ctest', '-C', config]
-
-check_call(cmake_command)
-check_call(build_command)
-check_call(test_command)
diff --git a/3rdparty/fmt/support/appveyor.yml b/3rdparty/fmt/support/appveyor.yml
deleted file mode 100644
index 64ca58a9..00000000
--- a/3rdparty/fmt/support/appveyor.yml
+++ /dev/null
@@ -1,31 +0,0 @@
-configuration:
-  - Debug
-  - Release
-
-clone_depth: 1
-
-image:
-  - Visual Studio 2015
-
-platform:
-  - x64
-
-environment:
-  CTEST_OUTPUT_ON_FAILURE: 1
-  MSVC_DEFAULT_OPTIONS: ON
-  BUILD: msvc
-
-before_build:
- - mkdir build
- - cd build
-
-build_script:
-  - python ../support/appveyor-build.py
-
-on_failure:
-  - appveyor PushArtifact Testing/Temporary/LastTest.log
-  - appveyor AddTest test
-
-# Uncomment this to debug AppVeyor failures.
-#on_finish:
-#  - ps: $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
diff --git a/3rdparty/fmt/support/bazel/.bazelrc b/3rdparty/fmt/support/bazel/.bazelrc
deleted file mode 100644
index 583cbbd2..00000000
--- a/3rdparty/fmt/support/bazel/.bazelrc
+++ /dev/null
@@ -1 +0,0 @@
-build --symlink_prefix=/ # Out of source build
diff --git a/3rdparty/fmt/support/bazel/.bazelversion b/3rdparty/fmt/support/bazel/.bazelversion
deleted file mode 100644
index fae6e3d0..00000000
--- a/3rdparty/fmt/support/bazel/.bazelversion
+++ /dev/null
@@ -1 +0,0 @@
-4.2.1
diff --git a/3rdparty/fmt/support/bazel/BUILD.bazel b/3rdparty/fmt/support/bazel/BUILD.bazel
deleted file mode 100644
index 3380bbca..00000000
--- a/3rdparty/fmt/support/bazel/BUILD.bazel
+++ /dev/null
@@ -1,29 +0,0 @@
-cc_library(
-    name = "fmt",
-    srcs = [
-        #"src/fmt.cc", # No C++ module support
-        "src/format.cc",
-        "src/os.cc",
-    ],
-    hdrs = [
-        "include/fmt/args.h",
-        "include/fmt/chrono.h",
-        "include/fmt/color.h",
-        "include/fmt/compile.h",
-        "include/fmt/core.h",
-        "include/fmt/format.h",
-        "include/fmt/format-inl.h",
-        "include/fmt/locale.h",
-        "include/fmt/os.h",
-        "include/fmt/ostream.h",
-        "include/fmt/printf.h",
-        "include/fmt/ranges.h",
-        "include/fmt/xchar.h",
-    ],
-    includes = [
-        "include",
-        "src",
-    ],
-    strip_include_prefix = "include",
-    visibility = ["//visibility:public"],
-)
diff --git a/3rdparty/fmt/support/bazel/README.md b/3rdparty/fmt/support/bazel/README.md
deleted file mode 100644
index 44af620c..00000000
--- a/3rdparty/fmt/support/bazel/README.md
+++ /dev/null
@@ -1,73 +0,0 @@
-# Bazel support
-
-To get [Bazel](https://bazel.build/) working with {fmt} you can copy the files `BUILD.bazel`, `WORKSPACE.bazel`, `.bazelrc`, and `.bazelversion` from this folder (`support/bazel`) to the root folder of this project. This way {fmt} gets bazelized and can be used with Bazel (e.g. doing a `bazel build //...` on {fmt}). 
-
-## Using {fmt} as a dependency
-
-The following minimal example shows how to use {fmt} as a dependency within a Bazel project.
-
-The following file structure is assumed:
-
-```
-example
-├── BUILD.bazel
-├── main.cpp
-└── WORKSPACE.bazel
-```
-
-*main.cpp*:
-
-```c++
-#include "fmt/core.h"
-
-int main() {
-  fmt::print("The answer is {}\n", 42);
-}
-```
-
-The expected output of this example is `The answer is 42`.
-
-*WORKSPACE.bazel*:
-
-```python
-load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
-
-git_repository(
-    name = "fmt",
-    branch = "master",
-    remote = "https://github.com/fmtlib/fmt",
-    patch_cmds = [
-        "mv support/bazel/.bazelrc .bazelrc",
-        "mv support/bazel/.bazelversion .bazelversion",
-        "mv support/bazel/BUILD.bazel BUILD.bazel",
-        "mv support/bazel/WORKSPACE.bazel WORKSPACE.bazel",
-    ],
-    # Windows-related patch commands are only needed in the case MSYS2 is not installed.
-    # More details about the installation process of MSYS2 on Windows systems can be found here:
-    # https://docs.bazel.build/versions/main/install-windows.html#installing-compilers-and-language-runtimes
-    # Even if MSYS2 is installed the Windows related patch commands can still be used.
-    patch_cmds_win = [
-        "Move-Item -Path support/bazel/.bazelrc -Destination .bazelrc",
-        "Move-Item -Path support/bazel/.bazelversion -Destination .bazelversion",
-        "Move-Item -Path support/bazel/BUILD.bazel -Destination BUILD.bazel",
-        "Move-Item -Path support/bazel/WORKSPACE.bazel -Destination WORKSPACE.bazel",
-    ],
-)
-```
-
-In the *WORKSPACE* file, the {fmt} GitHub repository is fetched. Using the attribute `patch_cmds` the  files `BUILD.bazel`, `WORKSPACE.bazel`, `.bazelrc`, and `.bazelversion` are moved to the root of the {fmt} repository. This way the {fmt} repository is recognized as a bazelized workspace. 
-
-*BUILD.bazel*:
-
-```python
-cc_binary(
-    name = "Demo",
-    srcs = ["main.cpp"],
-    deps = ["@fmt"],
-)
-```
-
-The *BUILD* file defines a binary named `Demo` that has a dependency to {fmt}.
-
-To execute the binary you can run `bazel run //:Demo`.
-
diff --git a/3rdparty/fmt/support/bazel/WORKSPACE.bazel b/3rdparty/fmt/support/bazel/WORKSPACE.bazel
deleted file mode 100644
index 5be77811..00000000
--- a/3rdparty/fmt/support/bazel/WORKSPACE.bazel
+++ /dev/null
@@ -1 +0,0 @@
-workspace(name = "fmt")
diff --git a/3rdparty/fmt/support/build-docs.py b/3rdparty/fmt/support/build-docs.py
deleted file mode 100644
index f1395cd6..00000000
--- a/3rdparty/fmt/support/build-docs.py
+++ /dev/null
@@ -1,58 +0,0 @@
-#!/usr/bin/env python
-# Build the documentation in CI.
-
-from __future__ import print_function
-import errno, os, shutil, subprocess, sys, urllib
-from subprocess import call, check_call, Popen, PIPE, STDOUT
-
-def rmtree_if_exists(dir):
-    try:
-        shutil.rmtree(dir)
-    except OSError as e:
-        if e.errno == errno.ENOENT:
-            pass
-
-# Build the docs.
-fmt_dir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
-sys.path.insert(0, os.path.join(fmt_dir, 'doc'))
-import build
-build.create_build_env()
-html_dir = build.build_docs()
-
-repo = 'fmtlib.github.io'
-branch = os.environ['GITHUB_REF']
-is_ci = 'CI' in os.environ
-if is_ci and branch != 'refs/heads/master':
-    print('Branch: ' + branch)
-    exit(0) # Ignore non-master branches
-if is_ci and 'KEY' not in os.environ:
-    # Don't update the repo if building in CI from an account that doesn't have
-    # push access.
-    print('Skipping update of ' + repo)
-    exit(0)
-
-# Clone the fmtlib.github.io repo.
-rmtree_if_exists(repo)
-git_url = 'https://github.com/' if is_ci else 'git@github.com:'
-check_call(['git', 'clone', git_url + 'fmtlib/{}.git'.format(repo)])
-
-# Copy docs to the repo.
-target_dir = os.path.join(repo, 'dev')
-rmtree_if_exists(target_dir)
-shutil.copytree(html_dir, target_dir, ignore=shutil.ignore_patterns('.*'))
-if is_ci:
-    check_call(['git', 'config', '--global', 'user.name', 'fmtbot'])
-    check_call(['git', 'config', '--global', 'user.email', 'viz@fmt.dev'])
-
-# Push docs to GitHub pages.
-check_call(['git', 'add', '--all'], cwd=repo)
-if call(['git', 'diff-index', '--quiet', 'HEAD'], cwd=repo):
-    check_call(['git', 'commit', '-m', 'Update documentation'], cwd=repo)
-    cmd = 'git push'
-    if is_ci:
-        cmd += ' https://$KEY@github.com/fmtlib/fmtlib.github.io.git master'
-    p = Popen(cmd, shell=True, stdout=PIPE, stderr=STDOUT, cwd=repo)
-    # Print the output without the key.
-    print(p.communicate()[0].decode('utf-8').replace(os.environ['KEY'], '$KEY'))
-    if p.returncode != 0:
-        raise subprocess.CalledProcessError(p.returncode, cmd)
diff --git a/3rdparty/fmt/support/build.gradle b/3rdparty/fmt/support/build.gradle
deleted file mode 100644
index 8d18da6b..00000000
--- a/3rdparty/fmt/support/build.gradle
+++ /dev/null
@@ -1,132 +0,0 @@
-import java.nio.file.Paths
-
-// General gradle arguments for root project
-buildscript {    
-    repositories {
-        google()
-        jcenter()
-    }
-    dependencies {
-        //
-        // https://developer.android.com/studio/releases/gradle-plugin#updating-gradle
-        //
-        // Notice that 4.0.0 here is the version of [Android Gradle Plugin]
-        // Accroding to URL above you will need Gradle 6.1 or higher
-        //
-        classpath "com.android.tools.build:gradle:4.1.1"
-    }
-}
-repositories {
-    google()
-    jcenter()
-}
-
-// Project's root where CMakeLists.txt exists: rootDir/support/.cxx -> rootDir
-def rootDir = Paths.get(project.buildDir.getParent()).getParent()
-println("rootDir: ${rootDir}")
-
-// Output: Shared library (.so) for Android 
-apply plugin: "com.android.library"
-android {
-    compileSdkVersion 25    // Android 7.0
-
-    // Target ABI
-    //  - This option controls target platform of module
-    //  - The platform might be limited by compiler's support
-    //    some can work with Clang(default), but some can work only with GCC...
-    //    if bad, both toolchains might not support it
-    splits {
-        abi {
-            enable true
-            // Specify platforms for Application
-            reset()
-            include  "arm64-v8a", "armeabi-v7a", "x86_64"
-        }
-    }
-    ndkVersion "21.3.6528147" // ANDROID_NDK_HOME is deprecated. Be explicit
-
-    defaultConfig {
-        minSdkVersion 21    // Android 5.0+
-        targetSdkVersion 25 // Follow Compile SDK
-        versionCode 34      // Follow release count
-        versionName "7.1.2" // Follow Official version
-        
-        externalNativeBuild {
-            cmake {
-                arguments "-DANDROID_STL=c++_shared"    // Specify Android STL
-                arguments "-DBUILD_SHARED_LIBS=true"    // Build shared object
-                arguments "-DFMT_TEST=false"            // Skip test
-                arguments "-DFMT_DOC=false"             // Skip document
-                cppFlags  "-std=c++17"
-                targets   "fmt"
-            }
-        }
-        println(externalNativeBuild.cmake.cppFlags)
-        println(externalNativeBuild.cmake.arguments)
-    }
-
-    // External Native build
-    //  - Use existing CMakeList.txt
-    //  - Give path to CMake. This gradle file should be 
-    //    neighbor of the top level cmake
-    externalNativeBuild {
-        cmake {
-            version "3.10.0+"
-            path "${rootDir}/CMakeLists.txt"
-            // buildStagingDirectory "./build"  // Custom path for cmake output
-        }
-    }
-    
-    sourceSets{
-        // Android Manifest for Gradle
-        main {
-            manifest.srcFile "AndroidManifest.xml"
-        }
-    }
-
-    // https://developer.android.com/studio/build/native-dependencies#build_system_configuration
-    buildFeatures {
-        prefab true
-        prefabPublishing true
-    }
-    prefab {
-        fmt {
-            headers "${rootDir}/include"
-        }
-    }
-}
-
-assemble.doLast
-{
-    // Instead of `ninja install`, Gradle will deploy the files.
-    // We are doing this since FMT is dependent to the ANDROID_STL after build
-    copy {
-        from "build/intermediates/cmake"
-        into "${rootDir}/libs"
-    }
-    // Copy debug binaries
-    copy {
-        from "${rootDir}/libs/debug/obj"
-        into "${rootDir}/libs/debug"
-    }
-    // Copy Release binaries
-    copy {
-        from "${rootDir}/libs/release/obj"
-        into "${rootDir}/libs/release"
-    }
-    // Remove empty directory
-    delete "${rootDir}/libs/debug/obj"
-    delete "${rootDir}/libs/release/obj"
-
-    // Copy AAR files. Notice that the aar is named after the folder of this script.
-    copy {
-        from "build/outputs/aar/support-release.aar"
-        into "${rootDir}/libs"
-        rename "support-release.aar", "fmt-release.aar"
-    }
-    copy {
-        from "build/outputs/aar/support-debug.aar"
-        into "${rootDir}/libs"
-        rename "support-debug.aar", "fmt-debug.aar"
-    }
-}
diff --git a/3rdparty/fmt/support/cmake/FindSetEnv.cmake b/3rdparty/fmt/support/cmake/FindSetEnv.cmake
deleted file mode 100644
index 4e2da540..00000000
--- a/3rdparty/fmt/support/cmake/FindSetEnv.cmake
+++ /dev/null
@@ -1,7 +0,0 @@
-# A CMake script to find SetEnv.cmd.
-
-find_program(WINSDK_SETENV NAMES SetEnv.cmd
-  PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Microsoft SDKs\\Windows;CurrentInstallFolder]/bin")
-if (WINSDK_SETENV AND PRINT_PATH)
-  execute_process(COMMAND ${CMAKE_COMMAND} -E echo "${WINSDK_SETENV}")
-endif ()
diff --git a/3rdparty/fmt/support/cmake/JoinPaths.cmake b/3rdparty/fmt/support/cmake/JoinPaths.cmake
deleted file mode 100644
index 32d6d668..00000000
--- a/3rdparty/fmt/support/cmake/JoinPaths.cmake
+++ /dev/null
@@ -1,26 +0,0 @@
-# This module provides function for joining paths
-# known from from most languages
-#
-# Original license:
-# SPDX-License-Identifier: (MIT OR CC0-1.0)
-# Explicit permission given to distribute this module under
-# the terms of the project as described in /LICENSE.rst.
-# Copyright 2020 Jan Tojnar
-# https://github.com/jtojnar/cmake-snips
-#
-# Modelled after Python’s os.path.join
-# https://docs.python.org/3.7/library/os.path.html#os.path.join
-# Windows not supported
-function(join_paths joined_path first_path_segment)
-    set(temp_path "${first_path_segment}")
-    foreach(current_segment IN LISTS ARGN)
-        if(NOT ("${current_segment}" STREQUAL ""))
-            if(IS_ABSOLUTE "${current_segment}")
-                set(temp_path "${current_segment}")
-            else()
-                set(temp_path "${temp_path}/${current_segment}")
-            endif()
-        endif()
-    endforeach()
-    set(${joined_path} "${temp_path}" PARENT_SCOPE)
-endfunction()
diff --git a/3rdparty/fmt/support/cmake/cxx14.cmake b/3rdparty/fmt/support/cmake/cxx14.cmake
deleted file mode 100644
index 16ff5754..00000000
--- a/3rdparty/fmt/support/cmake/cxx14.cmake
+++ /dev/null
@@ -1,70 +0,0 @@
-# C++14 feature support detection
-
-include(CheckCXXSourceCompiles)
-include(CheckCXXCompilerFlag)
-
-if (NOT CMAKE_CXX_STANDARD)
-  set(CMAKE_CXX_STANDARD 11)
-endif()
-message(STATUS "CXX_STANDARD: ${CMAKE_CXX_STANDARD}")
-
-if (CMAKE_CXX_STANDARD EQUAL 20)
-  check_cxx_compiler_flag(-std=c++20 has_std_20_flag)
-  check_cxx_compiler_flag(-std=c++2a has_std_2a_flag)
-
-  if (has_std_20_flag)
-    set(CXX_STANDARD_FLAG -std=c++20)
-  elseif (has_std_2a_flag)
-    set(CXX_STANDARD_FLAG -std=c++2a)
-  endif ()
-elseif (CMAKE_CXX_STANDARD EQUAL 17)
-  check_cxx_compiler_flag(-std=c++17 has_std_17_flag)
-  check_cxx_compiler_flag(-std=c++1z has_std_1z_flag)
-
-  if (has_std_17_flag)
-    set(CXX_STANDARD_FLAG -std=c++17)
-  elseif (has_std_1z_flag)
-    set(CXX_STANDARD_FLAG -std=c++1z)
-  endif ()
-elseif (CMAKE_CXX_STANDARD EQUAL 14)
-  check_cxx_compiler_flag(-std=c++14 has_std_14_flag)
-  check_cxx_compiler_flag(-std=c++1y has_std_1y_flag)
-
-  if (has_std_14_flag)
-    set(CXX_STANDARD_FLAG -std=c++14)
-  elseif (has_std_1y_flag)
-    set(CXX_STANDARD_FLAG -std=c++1y)
-  endif ()
-elseif (CMAKE_CXX_STANDARD EQUAL 11)
-  check_cxx_compiler_flag(-std=c++11 has_std_11_flag)
-  check_cxx_compiler_flag(-std=c++0x has_std_0x_flag)
-
-  if (has_std_11_flag)
-    set(CXX_STANDARD_FLAG -std=c++11)
-  elseif (has_std_0x_flag)
-    set(CXX_STANDARD_FLAG -std=c++0x)
-  endif ()
-endif ()
-
-set(CMAKE_REQUIRED_FLAGS ${CXX_STANDARD_FLAG})
-
-# Check if user-defined literals are available
-check_cxx_source_compiles("
-  void operator\"\" _udl(long double);
-  int main() {}"
-  SUPPORTS_USER_DEFINED_LITERALS)
-if (NOT SUPPORTS_USER_DEFINED_LITERALS)
-  set (SUPPORTS_USER_DEFINED_LITERALS OFF)
-endif ()
-
-# Check if <variant> is available
-set(CMAKE_REQUIRED_FLAGS -std=c++1z)
-check_cxx_source_compiles("
-  #include <variant>
-  int main() {}"
-  FMT_HAS_VARIANT)
-if (NOT FMT_HAS_VARIANT)
-  set (FMT_HAS_VARIANT OFF)
-endif ()
-
-set(CMAKE_REQUIRED_FLAGS )
diff --git a/3rdparty/fmt/support/cmake/fmt-config.cmake.in b/3rdparty/fmt/support/cmake/fmt-config.cmake.in
deleted file mode 100644
index 71e30286..00000000
--- a/3rdparty/fmt/support/cmake/fmt-config.cmake.in
+++ /dev/null
@@ -1,4 +0,0 @@
-@PACKAGE_INIT@
-
-include(${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake)
-check_required_components(fmt)
diff --git a/3rdparty/fmt/support/cmake/fmt.pc.in b/3rdparty/fmt/support/cmake/fmt.pc.in
deleted file mode 100644
index 29976a8a..00000000
--- a/3rdparty/fmt/support/cmake/fmt.pc.in
+++ /dev/null
@@ -1,11 +0,0 @@
-prefix=@CMAKE_INSTALL_PREFIX@
-exec_prefix=@CMAKE_INSTALL_PREFIX@
-libdir=@libdir_for_pc_file@
-includedir=@includedir_for_pc_file@
-
-Name: fmt
-Description: A modern formatting library
-Version: @FMT_VERSION@
-Libs: -L${libdir} -l@FMT_LIB_NAME@
-Cflags: -I${includedir}
-
diff --git a/3rdparty/fmt/support/compute-powers.py b/3rdparty/fmt/support/compute-powers.py
deleted file mode 100644
index 601063d4..00000000
--- a/3rdparty/fmt/support/compute-powers.py
+++ /dev/null
@@ -1,53 +0,0 @@
-#!/usr/bin/env python
-# Compute 10 ** exp with exp in the range [min_exponent, max_exponent] and print
-# normalized (with most-significant bit equal to 1) significands in hexadecimal.
-
-from __future__ import print_function
-
-min_exponent = -348
-max_exponent = 340
-step = 8
-significand_size = 64
-exp_offset = 2000
-
-class fp:
-    pass
-
-powers = []
-for i, exp in enumerate(range(min_exponent, max_exponent + 1, step)):
-    result = fp()
-    n = 10 ** exp if exp >= 0 else 2 ** exp_offset / 10 ** -exp
-    k = significand_size + 1
-    # Convert to binary and round.
-    binary = '{:b}'.format(n)
-    result.f = (int('{:0<{}}'.format(binary[:k], k), 2) + 1) / 2
-    result.e = len(binary) - (exp_offset if exp < 0 else 0) - significand_size
-    powers.append(result)
-    # Sanity check.
-    exp_offset10 = 400
-    actual = result.f * 10 ** exp_offset10
-    if result.e > 0:
-        actual *= 2 ** result.e
-    else:
-        for j in range(-result.e):
-            actual /= 2
-    expected = 10 ** (exp_offset10 + exp)
-    precision = len('{}'.format(expected)) - len('{}'.format(actual - expected))
-    if precision < 19:
-        print('low precision:', precision)
-        exit(1)
-
-print('Significands:', end='')
-for i, fp in enumerate(powers):
-    if i % 3 == 0:
-        print(end='\n ')
-    print(' {:0<#16x}'.format(fp.f, ), end=',')
-
-print('\n\nExponents:', end='')
-for i, fp in enumerate(powers):
-    if i % 11 == 0:
-        print(end='\n ')
-    print(' {:5}'.format(fp.e), end=',')
-
-print('\n\nMax exponent difference:',
-      max([x.e - powers[i - 1].e for i, x in enumerate(powers)][1:]))
diff --git a/3rdparty/fmt/support/docopt.py b/3rdparty/fmt/support/docopt.py
deleted file mode 100644
index 2e43f7ce..00000000
--- a/3rdparty/fmt/support/docopt.py
+++ /dev/null
@@ -1,581 +0,0 @@
-"""Pythonic command-line interface parser that will make you smile.
-
- * http://docopt.org
- * Repository and issue-tracker: https://github.com/docopt/docopt
- * Licensed under terms of MIT license (see LICENSE-MIT)
- * Copyright (c) 2013 Vladimir Keleshev, vladimir@keleshev.com
-
-"""
-import sys
-import re
-
-
-__all__ = ['docopt']
-__version__ = '0.6.1'
-
-
-class DocoptLanguageError(Exception):
-
-    """Error in construction of usage-message by developer."""
-
-
-class DocoptExit(SystemExit):
-
-    """Exit in case user invoked program with incorrect arguments."""
-
-    usage = ''
-
-    def __init__(self, message=''):
-        SystemExit.__init__(self, (message + '\n' + self.usage).strip())
-
-
-class Pattern(object):
-
-    def __eq__(self, other):
-        return repr(self) == repr(other)
-
-    def __hash__(self):
-        return hash(repr(self))
-
-    def fix(self):
-        self.fix_identities()
-        self.fix_repeating_arguments()
-        return self
-
-    def fix_identities(self, uniq=None):
-        """Make pattern-tree tips point to same object if they are equal."""
-        if not hasattr(self, 'children'):
-            return self
-        uniq = list(set(self.flat())) if uniq is None else uniq
-        for i, child in enumerate(self.children):
-            if not hasattr(child, 'children'):
-                assert child in uniq
-                self.children[i] = uniq[uniq.index(child)]
-            else:
-                child.fix_identities(uniq)
-
-    def fix_repeating_arguments(self):
-        """Fix elements that should accumulate/increment values."""
-        either = [list(child.children) for child in transform(self).children]
-        for case in either:
-            for e in [child for child in case if case.count(child) > 1]:
-                if type(e) is Argument or type(e) is Option and e.argcount:
-                    if e.value is None:
-                        e.value = []
-                    elif type(e.value) is not list:
-                        e.value = e.value.split()
-                if type(e) is Command or type(e) is Option and e.argcount == 0:
-                    e.value = 0
-        return self
-
-
-def transform(pattern):
-    """Expand pattern into an (almost) equivalent one, but with single Either.
-
-    Example: ((-a | -b) (-c | -d)) => (-a -c | -a -d | -b -c | -b -d)
-    Quirks: [-a] => (-a), (-a...) => (-a -a)
-
-    """
-    result = []
-    groups = [[pattern]]
-    while groups:
-        children = groups.pop(0)
-        parents = [Required, Optional, OptionsShortcut, Either, OneOrMore]
-        if any(t in map(type, children) for t in parents):
-            child = [c for c in children if type(c) in parents][0]
-            children.remove(child)
-            if type(child) is Either:
-                for c in child.children:
-                    groups.append([c] + children)
-            elif type(child) is OneOrMore:
-                groups.append(child.children * 2 + children)
-            else:
-                groups.append(child.children + children)
-        else:
-            result.append(children)
-    return Either(*[Required(*e) for e in result])
-
-
-class LeafPattern(Pattern):
-
-    """Leaf/terminal node of a pattern tree."""
-
-    def __init__(self, name, value=None):
-        self.name, self.value = name, value
-
-    def __repr__(self):
-        return '%s(%r, %r)' % (self.__class__.__name__, self.name, self.value)
-
-    def flat(self, *types):
-        return [self] if not types or type(self) in types else []
-
-    def match(self, left, collected=None):
-        collected = [] if collected is None else collected
-        pos, match = self.single_match(left)
-        if match is None:
-            return False, left, collected
-        left_ = left[:pos] + left[pos + 1:]
-        same_name = [a for a in collected if a.name == self.name]
-        if type(self.value) in (int, list):
-            if type(self.value) is int:
-                increment = 1
-            else:
-                increment = ([match.value] if type(match.value) is str
-                             else match.value)
-            if not same_name:
-                match.value = increment
-                return True, left_, collected + [match]
-            same_name[0].value += increment
-            return True, left_, collected
-        return True, left_, collected + [match]
-
-
-class BranchPattern(Pattern):
-
-    """Branch/inner node of a pattern tree."""
-
-    def __init__(self, *children):
-        self.children = list(children)
-
-    def __repr__(self):
-        return '%s(%s)' % (self.__class__.__name__,
-                           ', '.join(repr(a) for a in self.children))
-
-    def flat(self, *types):
-        if type(self) in types:
-            return [self]
-        return sum([child.flat(*types) for child in self.children], [])
-
-
-class Argument(LeafPattern):
-
-    def single_match(self, left):
-        for n, pattern in enumerate(left):
-            if type(pattern) is Argument:
-                return n, Argument(self.name, pattern.value)
-        return None, None
-
-    @classmethod
-    def parse(class_, source):
-        name = re.findall('(<\S*?>)', source)[0]
-        value = re.findall('\[default: (.*)\]', source, flags=re.I)
-        return class_(name, value[0] if value else None)
-
-
-class Command(Argument):
-
-    def __init__(self, name, value=False):
-        self.name, self.value = name, value
-
-    def single_match(self, left):
-        for n, pattern in enumerate(left):
-            if type(pattern) is Argument:
-                if pattern.value == self.name:
-                    return n, Command(self.name, True)
-                else:
-                    break
-        return None, None
-
-
-class Option(LeafPattern):
-
-    def __init__(self, short=None, long=None, argcount=0, value=False):
-        assert argcount in (0, 1)
-        self.short, self.long, self.argcount = short, long, argcount
-        self.value = None if value is False and argcount else value
-
-    @classmethod
-    def parse(class_, option_description):
-        short, long, argcount, value = None, None, 0, False
-        options, _, description = option_description.strip().partition('  ')
-        options = options.replace(',', ' ').replace('=', ' ')
-        for s in options.split():
-            if s.startswith('--'):
-                long = s
-            elif s.startswith('-'):
-                short = s
-            else:
-                argcount = 1
-        if argcount:
-            matched = re.findall('\[default: (.*)\]', description, flags=re.I)
-            value = matched[0] if matched else None
-        return class_(short, long, argcount, value)
-
-    def single_match(self, left):
-        for n, pattern in enumerate(left):
-            if self.name == pattern.name:
-                return n, pattern
-        return None, None
-
-    @property
-    def name(self):
-        return self.long or self.short
-
-    def __repr__(self):
-        return 'Option(%r, %r, %r, %r)' % (self.short, self.long,
-                                           self.argcount, self.value)
-
-
-class Required(BranchPattern):
-
-    def match(self, left, collected=None):
-        collected = [] if collected is None else collected
-        l = left
-        c = collected
-        for pattern in self.children:
-            matched, l, c = pattern.match(l, c)
-            if not matched:
-                return False, left, collected
-        return True, l, c
-
-
-class Optional(BranchPattern):
-
-    def match(self, left, collected=None):
-        collected = [] if collected is None else collected
-        for pattern in self.children:
-            m, left, collected = pattern.match(left, collected)
-        return True, left, collected
-
-
-class OptionsShortcut(Optional):
-
-    """Marker/placeholder for [options] shortcut."""
-
-
-class OneOrMore(BranchPattern):
-
-    def match(self, left, collected=None):
-        assert len(self.children) == 1
-        collected = [] if collected is None else collected
-        l = left
-        c = collected
-        l_ = None
-        matched = True
-        times = 0
-        while matched:
-            # could it be that something didn't match but changed l or c?
-            matched, l, c = self.children[0].match(l, c)
-            times += 1 if matched else 0
-            if l_ == l:
-                break
-            l_ = l
-        if times >= 1:
-            return True, l, c
-        return False, left, collected
-
-
-class Either(BranchPattern):
-
-    def match(self, left, collected=None):
-        collected = [] if collected is None else collected
-        outcomes = []
-        for pattern in self.children:
-            matched, _, _ = outcome = pattern.match(left, collected)
-            if matched:
-                outcomes.append(outcome)
-        if outcomes:
-            return min(outcomes, key=lambda outcome: len(outcome[1]))
-        return False, left, collected
-
-
-class Tokens(list):
-
-    def __init__(self, source, error=DocoptExit):
-        self += source.split() if hasattr(source, 'split') else source
-        self.error = error
-
-    @staticmethod
-    def from_pattern(source):
-        source = re.sub(r'([\[\]\(\)\|]|\.\.\.)', r' \1 ', source)
-        source = [s for s in re.split('\s+|(\S*<.*?>)', source) if s]
-        return Tokens(source, error=DocoptLanguageError)
-
-    def move(self):
-        return self.pop(0) if len(self) else None
-
-    def current(self):
-        return self[0] if len(self) else None
-
-
-def parse_long(tokens, options):
-    """long ::= '--' chars [ ( ' ' | '=' ) chars ] ;"""
-    long, eq, value = tokens.move().partition('=')
-    assert long.startswith('--')
-    value = None if eq == value == '' else value
-    similar = [o for o in options if o.long == long]
-    if tokens.error is DocoptExit and similar == []:  # if no exact match
-        similar = [o for o in options if o.long and o.long.startswith(long)]
-    if len(similar) > 1:  # might be simply specified ambiguously 2+ times?
-        raise tokens.error('%s is not a unique prefix: %s?' %
-                           (long, ', '.join(o.long for o in similar)))
-    elif len(similar) < 1:
-        argcount = 1 if eq == '=' else 0
-        o = Option(None, long, argcount)
-        options.append(o)
-        if tokens.error is DocoptExit:
-            o = Option(None, long, argcount, value if argcount else True)
-    else:
-        o = Option(similar[0].short, similar[0].long,
-                   similar[0].argcount, similar[0].value)
-        if o.argcount == 0:
-            if value is not None:
-                raise tokens.error('%s must not have an argument' % o.long)
-        else:
-            if value is None:
-                if tokens.current() in [None, '--']:
-                    raise tokens.error('%s requires argument' % o.long)
-                value = tokens.move()
-        if tokens.error is DocoptExit:
-            o.value = value if value is not None else True
-    return [o]
-
-
-def parse_shorts(tokens, options):
-    """shorts ::= '-' ( chars )* [ [ ' ' ] chars ] ;"""
-    token = tokens.move()
-    assert token.startswith('-') and not token.startswith('--')
-    left = token.lstrip('-')
-    parsed = []
-    while left != '':
-        short, left = '-' + left[0], left[1:]
-        similar = [o for o in options if o.short == short]
-        if len(similar) > 1:
-            raise tokens.error('%s is specified ambiguously %d times' %
-                               (short, len(similar)))
-        elif len(similar) < 1:
-            o = Option(short, None, 0)
-            options.append(o)
-            if tokens.error is DocoptExit:
-                o = Option(short, None, 0, True)
-        else:  # why copying is necessary here?
-            o = Option(short, similar[0].long,
-                       similar[0].argcount, similar[0].value)
-            value = None
-            if o.argcount != 0:
-                if left == '':
-                    if tokens.current() in [None, '--']:
-                        raise tokens.error('%s requires argument' % short)
-                    value = tokens.move()
-                else:
-                    value = left
-                    left = ''
-            if tokens.error is DocoptExit:
-                o.value = value if value is not None else True
-        parsed.append(o)
-    return parsed
-
-
-def parse_pattern(source, options):
-    tokens = Tokens.from_pattern(source)
-    result = parse_expr(tokens, options)
-    if tokens.current() is not None:
-        raise tokens.error('unexpected ending: %r' % ' '.join(tokens))
-    return Required(*result)
-
-
-def parse_expr(tokens, options):
-    """expr ::= seq ( '|' seq )* ;"""
-    seq = parse_seq(tokens, options)
-    if tokens.current() != '|':
-        return seq
-    result = [Required(*seq)] if len(seq) > 1 else seq
-    while tokens.current() == '|':
-        tokens.move()
-        seq = parse_seq(tokens, options)
-        result += [Required(*seq)] if len(seq) > 1 else seq
-    return [Either(*result)] if len(result) > 1 else result
-
-
-def parse_seq(tokens, options):
-    """seq ::= ( atom [ '...' ] )* ;"""
-    result = []
-    while tokens.current() not in [None, ']', ')', '|']:
-        atom = parse_atom(tokens, options)
-        if tokens.current() == '...':
-            atom = [OneOrMore(*atom)]
-            tokens.move()
-        result += atom
-    return result
-
-
-def parse_atom(tokens, options):
-    """atom ::= '(' expr ')' | '[' expr ']' | 'options'
-             | long | shorts | argument | command ;
-    """
-    token = tokens.current()
-    result = []
-    if token in '([':
-        tokens.move()
-        matching, pattern = {'(': [')', Required], '[': [']', Optional]}[token]
-        result = pattern(*parse_expr(tokens, options))
-        if tokens.move() != matching:
-            raise tokens.error("unmatched '%s'" % token)
-        return [result]
-    elif token == 'options':
-        tokens.move()
-        return [OptionsShortcut()]
-    elif token.startswith('--') and token != '--':
-        return parse_long(tokens, options)
-    elif token.startswith('-') and token not in ('-', '--'):
-        return parse_shorts(tokens, options)
-    elif token.startswith('<') and token.endswith('>') or token.isupper():
-        return [Argument(tokens.move())]
-    else:
-        return [Command(tokens.move())]
-
-
-def parse_argv(tokens, options, options_first=False):
-    """Parse command-line argument vector.
-
-    If options_first:
-        argv ::= [ long | shorts ]* [ argument ]* [ '--' [ argument ]* ] ;
-    else:
-        argv ::= [ long | shorts | argument ]* [ '--' [ argument ]* ] ;
-
-    """
-    parsed = []
-    while tokens.current() is not None:
-        if tokens.current() == '--':
-            return parsed + [Argument(None, v) for v in tokens]
-        elif tokens.current().startswith('--'):
-            parsed += parse_long(tokens, options)
-        elif tokens.current().startswith('-') and tokens.current() != '-':
-            parsed += parse_shorts(tokens, options)
-        elif options_first:
-            return parsed + [Argument(None, v) for v in tokens]
-        else:
-            parsed.append(Argument(None, tokens.move()))
-    return parsed
-
-
-def parse_defaults(doc):
-    defaults = []
-    for s in parse_section('options:', doc):
-        # FIXME corner case "bla: options: --foo"
-        _, _, s = s.partition(':')  # get rid of "options:"
-        split = re.split('\n[ \t]*(-\S+?)', '\n' + s)[1:]
-        split = [s1 + s2 for s1, s2 in zip(split[::2], split[1::2])]
-        options = [Option.parse(s) for s in split if s.startswith('-')]
-        defaults += options
-    return defaults
-
-
-def parse_section(name, source):
-    pattern = re.compile('^([^\n]*' + name + '[^\n]*\n?(?:[ \t].*?(?:\n|$))*)',
-                         re.IGNORECASE | re.MULTILINE)
-    return [s.strip() for s in pattern.findall(source)]
-
-
-def formal_usage(section):
-    _, _, section = section.partition(':')  # drop "usage:"
-    pu = section.split()
-    return '( ' + ' '.join(') | (' if s == pu[0] else s for s in pu[1:]) + ' )'
-
-
-def extras(help, version, options, doc):
-    if help and any((o.name in ('-h', '--help')) and o.value for o in options):
-        print(doc.strip("\n"))
-        sys.exit()
-    if version and any(o.name == '--version' and o.value for o in options):
-        print(version)
-        sys.exit()
-
-
-class Dict(dict):
-    def __repr__(self):
-        return '{%s}' % ',\n '.join('%r: %r' % i for i in sorted(self.items()))
-
-
-def docopt(doc, argv=None, help=True, version=None, options_first=False):
-    """Parse `argv` based on command-line interface described in `doc`.
-
-    `docopt` creates your command-line interface based on its
-    description that you pass as `doc`. Such description can contain
-    --options, <positional-argument>, commands, which could be
-    [optional], (required), (mutually | exclusive) or repeated...
-
-    Parameters
-    ----------
-    doc : str
-        Description of your command-line interface.
-    argv : list of str, optional
-        Argument vector to be parsed. sys.argv[1:] is used if not
-        provided.
-    help : bool (default: True)
-        Set to False to disable automatic help on -h or --help
-        options.
-    version : any object
-        If passed, the object will be printed if --version is in
-        `argv`.
-    options_first : bool (default: False)
-        Set to True to require options precede positional arguments,
-        i.e. to forbid options and positional arguments intermix.
-
-    Returns
-    -------
-    args : dict
-        A dictionary, where keys are names of command-line elements
-        such as e.g. "--verbose" and "<path>", and values are the
-        parsed values of those elements.
-
-    Example
-    -------
-    >>> from docopt import docopt
-    >>> doc = '''
-    ... Usage:
-    ...     my_program tcp <host> <port> [--timeout=<seconds>]
-    ...     my_program serial <port> [--baud=<n>] [--timeout=<seconds>]
-    ...     my_program (-h | --help | --version)
-    ...
-    ... Options:
-    ...     -h, --help  Show this screen and exit.
-    ...     --baud=<n>  Baudrate [default: 9600]
-    ... '''
-    >>> argv = ['tcp', '127.0.0.1', '80', '--timeout', '30']
-    >>> docopt(doc, argv)
-    {'--baud': '9600',
-     '--help': False,
-     '--timeout': '30',
-     '--version': False,
-     '<host>': '127.0.0.1',
-     '<port>': '80',
-     'serial': False,
-     'tcp': True}
-
-    See also
-    --------
-    * For video introduction see http://docopt.org
-    * Full documentation is available in README.rst as well as online
-      at https://github.com/docopt/docopt#readme
-
-    """
-    argv = sys.argv[1:] if argv is None else argv
-
-    usage_sections = parse_section('usage:', doc)
-    if len(usage_sections) == 0:
-        raise DocoptLanguageError('"usage:" (case-insensitive) not found.')
-    if len(usage_sections) > 1:
-        raise DocoptLanguageError('More than one "usage:" (case-insensitive).')
-    DocoptExit.usage = usage_sections[0]
-
-    options = parse_defaults(doc)
-    pattern = parse_pattern(formal_usage(DocoptExit.usage), options)
-    # [default] syntax for argument is disabled
-    #for a in pattern.flat(Argument):
-    #    same_name = [d for d in arguments if d.name == a.name]
-    #    if same_name:
-    #        a.value = same_name[0].value
-    argv = parse_argv(Tokens(argv), list(options), options_first)
-    pattern_options = set(pattern.flat(Option))
-    for options_shortcut in pattern.flat(OptionsShortcut):
-        doc_options = parse_defaults(doc)
-        options_shortcut.children = list(set(doc_options) - pattern_options)
-        #if any_options:
-        #    options_shortcut.children += [Option(o.short, o.long, o.argcount)
-        #                    for o in argv if type(o) is Option]
-    extras(help, version, argv, doc)
-    matched, left, collected = pattern.fix().match(argv)
-    if matched and left == []:  # better error message if left?
-        return Dict((a.name, a.value) for a in (pattern.flat() + collected))
-    raise DocoptExit()
diff --git a/3rdparty/fmt/support/manage.py b/3rdparty/fmt/support/manage.py
deleted file mode 100644
index bece4566..00000000
--- a/3rdparty/fmt/support/manage.py
+++ /dev/null
@@ -1,297 +0,0 @@
-#!/usr/bin/env python3
-
-"""Manage site and releases.
-
-Usage:
-  manage.py release [<branch>]
-  manage.py site
-
-For the release command $FMT_TOKEN should contain a GitHub personal access token
-obtained from https://github.com/settings/tokens.
-"""
-
-from __future__ import print_function
-import datetime, docopt, errno, fileinput, json, os
-import re, requests, shutil, sys, tempfile
-from contextlib import contextmanager
-from distutils.version import LooseVersion
-from subprocess import check_call
-
-
-class Git:
-    def __init__(self, dir):
-        self.dir = dir
-
-    def call(self, method, args, **kwargs):
-        return check_call(['git', method] + list(args), **kwargs)
-
-    def add(self, *args):
-        return self.call('add', args, cwd=self.dir)
-
-    def checkout(self, *args):
-        return self.call('checkout', args, cwd=self.dir)
-
-    def clean(self, *args):
-        return self.call('clean', args, cwd=self.dir)
-
-    def clone(self, *args):
-        return self.call('clone', list(args) + [self.dir])
-
-    def commit(self, *args):
-        return self.call('commit', args, cwd=self.dir)
-
-    def pull(self, *args):
-        return self.call('pull', args, cwd=self.dir)
-
-    def push(self, *args):
-        return self.call('push', args, cwd=self.dir)
-
-    def reset(self, *args):
-        return self.call('reset', args, cwd=self.dir)
-
-    def update(self, *args):
-        clone = not os.path.exists(self.dir)
-        if clone:
-            self.clone(*args)
-        return clone
-
-
-def clean_checkout(repo, branch):
-    repo.clean('-f', '-d')
-    repo.reset('--hard')
-    repo.checkout(branch)
-
-
-class Runner:
-    def __init__(self, cwd):
-        self.cwd = cwd
-
-    def __call__(self, *args, **kwargs):
-        kwargs['cwd'] = kwargs.get('cwd', self.cwd)
-        check_call(args, **kwargs)
-
-
-def create_build_env():
-    """Create a build environment."""
-    class Env:
-        pass
-    env = Env()
-
-    # Import the documentation build module.
-    env.fmt_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
-    sys.path.insert(0, os.path.join(env.fmt_dir, 'doc'))
-    import build
-
-    env.build_dir = 'build'
-    env.versions = build.versions
-
-    # Virtualenv and repos are cached to speed up builds.
-    build.create_build_env(os.path.join(env.build_dir, 'virtualenv'))
-
-    env.fmt_repo = Git(os.path.join(env.build_dir, 'fmt'))
-    return env
-
-
-@contextmanager
-def rewrite(filename):
-    class Buffer:
-        pass
-    buffer = Buffer()
-    if not os.path.exists(filename):
-        buffer.data = ''
-        yield buffer
-        return
-    with open(filename) as f:
-        buffer.data = f.read()
-    yield buffer
-    with open(filename, 'w') as f:
-        f.write(buffer.data)
-
-
-fmt_repo_url = 'git@github.com:fmtlib/fmt'
-
-
-def update_site(env):
-    env.fmt_repo.update(fmt_repo_url)
-
-    doc_repo = Git(os.path.join(env.build_dir, 'fmtlib.github.io'))
-    doc_repo.update('git@github.com:fmtlib/fmtlib.github.io')
-
-    for version in env.versions:
-        clean_checkout(env.fmt_repo, version)
-        target_doc_dir = os.path.join(env.fmt_repo.dir, 'doc')
-        # Remove the old theme.
-        for entry in os.listdir(target_doc_dir):
-            path = os.path.join(target_doc_dir, entry)
-            if os.path.isdir(path):
-                shutil.rmtree(path)
-        # Copy the new theme.
-        for entry in ['_static', '_templates', 'basic-bootstrap', 'bootstrap',
-                      'conf.py', 'fmt.less']:
-            src = os.path.join(env.fmt_dir, 'doc', entry)
-            dst = os.path.join(target_doc_dir, entry)
-            copy = shutil.copytree if os.path.isdir(src) else shutil.copyfile
-            copy(src, dst)
-        # Rename index to contents.
-        contents = os.path.join(target_doc_dir, 'contents.rst')
-        if not os.path.exists(contents):
-            os.rename(os.path.join(target_doc_dir, 'index.rst'), contents)
-        # Fix issues in reference.rst/api.rst.
-        for filename in ['reference.rst', 'api.rst', 'index.rst']:
-            pattern = re.compile('doxygenfunction.. (bin|oct|hexu|hex)$', re.M)
-            with rewrite(os.path.join(target_doc_dir, filename)) as b:
-                b.data = b.data.replace('std::ostream &', 'std::ostream&')
-                b.data = re.sub(pattern, r'doxygenfunction:: \1(int)', b.data)
-                b.data = b.data.replace('std::FILE*', 'std::FILE *')
-                b.data = b.data.replace('unsigned int', 'unsigned')
-                #b.data = b.data.replace('operator""_', 'operator"" _')
-                b.data = b.data.replace(
-                    'format_to_n(OutputIt, size_t, string_view, Args&&',
-                    'format_to_n(OutputIt, size_t, const S&, const Args&')
-                b.data = b.data.replace(
-                    'format_to_n(OutputIt, std::size_t, string_view, Args&&',
-                    'format_to_n(OutputIt, std::size_t, const S&, const Args&')
-                if version == ('3.0.2'):
-                    b.data = b.data.replace(
-                        'fprintf(std::ostream&', 'fprintf(std::ostream &')
-                if version == ('5.3.0'):
-                    b.data = b.data.replace(
-                        'format_to(OutputIt, const S&, const Args&...)',
-                        'format_to(OutputIt, const S &, const Args &...)')
-                if version.startswith('5.') or version.startswith('6.'):
-                    b.data = b.data.replace(', size_t', ', std::size_t')
-                if version.startswith('7.'):
-                    b.data = b.data.replace(', std::size_t', ', size_t')
-                    b.data = b.data.replace('join(It, It', 'join(It, Sentinel')
-                if version.startswith('7.1.'):
-                    b.data = b.data.replace(', std::size_t', ', size_t')
-                    b.data = b.data.replace('join(It, It', 'join(It, Sentinel')
-                    b.data = b.data.replace(
-                        'fmt::format_to(OutputIt, const S&, Args&&...)',
-                        'fmt::format_to(OutputIt, const S&, Args&&...) -> ' +
-                        'typename std::enable_if<enable, OutputIt>::type')
-                b.data = b.data.replace('aa long', 'a long')
-                b.data = b.data.replace('serveral', 'several')
-                if version.startswith('6.2.'):
-                    b.data = b.data.replace(
-                        'vformat(const S&, basic_format_args<' +
-                        'buffer_context<Char>>)',
-                        'vformat(const S&, basic_format_args<' +
-                        'buffer_context<type_identity_t<Char>>>)')
-        # Fix a broken link in index.rst.
-        index = os.path.join(target_doc_dir, 'index.rst')
-        with rewrite(index) as b:
-            b.data = b.data.replace(
-                'doc/latest/index.html#format-string-syntax', 'syntax.html')
-        # Build the docs.
-        html_dir = os.path.join(env.build_dir, 'html')
-        if os.path.exists(html_dir):
-            shutil.rmtree(html_dir)
-        include_dir = env.fmt_repo.dir
-        if LooseVersion(version) >= LooseVersion('5.0.0'):
-            include_dir = os.path.join(include_dir, 'include', 'fmt')
-        elif LooseVersion(version) >= LooseVersion('3.0.0'):
-            include_dir = os.path.join(include_dir, 'fmt')
-        import build
-        build.build_docs(version, doc_dir=target_doc_dir,
-                         include_dir=include_dir, work_dir=env.build_dir)
-        shutil.rmtree(os.path.join(html_dir, '.doctrees'))
-        # Create symlinks for older versions.
-        for link, target in {'index': 'contents', 'api': 'reference'}.items():
-            link = os.path.join(html_dir, link) + '.html'
-            target += '.html'
-            if os.path.exists(os.path.join(html_dir, target)) and \
-               not os.path.exists(link):
-                os.symlink(target, link)
-        # Copy docs to the website.
-        version_doc_dir = os.path.join(doc_repo.dir, version)
-        try:
-            shutil.rmtree(version_doc_dir)
-        except OSError as e:
-            if e.errno != errno.ENOENT:
-                raise
-        shutil.move(html_dir, version_doc_dir)
-
-
-def release(args):
-    env = create_build_env()
-    fmt_repo = env.fmt_repo
-
-    branch = args.get('<branch>')
-    if branch is None:
-        branch = 'master'
-    if not fmt_repo.update('-b', branch, fmt_repo_url):
-        clean_checkout(fmt_repo, branch)
-
-    # Convert changelog from RST to GitHub-flavored Markdown and get the
-    # version.
-    changelog = 'ChangeLog.rst'
-    changelog_path = os.path.join(fmt_repo.dir, changelog)
-    import rst2md
-    changes, version = rst2md.convert(changelog_path)
-    cmakelists = 'CMakeLists.txt'
-    for line in fileinput.input(os.path.join(fmt_repo.dir, cmakelists),
-                                inplace=True):
-        prefix = 'set(FMT_VERSION '
-        if line.startswith(prefix):
-            line = prefix + version + ')\n'
-        sys.stdout.write(line)
-
-    # Update the version in the changelog.
-    title_len = 0
-    for line in fileinput.input(changelog_path, inplace=True):
-        if line.startswith(version + ' - TBD'):
-            line = version + ' - ' + datetime.date.today().isoformat()
-            title_len = len(line)
-            line += '\n'
-        elif title_len:
-            line = '-' * title_len + '\n'
-            title_len = 0
-        sys.stdout.write(line)
-
-    # Add the version to the build script.
-    script = os.path.join('doc', 'build.py')
-    script_path = os.path.join(fmt_repo.dir, script)
-    for line in fileinput.input(script_path, inplace=True):
-      m = re.match(r'( *versions = )\[(.+)\]', line)
-      if m:
-        line = '{}[{}, \'{}\']\n'.format(m.group(1), m.group(2), version)
-      sys.stdout.write(line)
-
-    fmt_repo.checkout('-B', 'release')
-    fmt_repo.add(changelog, cmakelists, script)
-    fmt_repo.commit('-m', 'Update version')
-
-    # Build the docs and package.
-    run = Runner(fmt_repo.dir)
-    run('cmake', '.')
-    run('make', 'doc', 'package_source')
-    update_site(env)
-
-    # Create a release on GitHub.
-    fmt_repo.push('origin', 'release')
-    auth_headers = {'Authorization': 'token ' + os.getenv('FMT_TOKEN')}
-    r = requests.post('https://api.github.com/repos/fmtlib/fmt/releases',
-                      headers=auth_headers,
-                      data=json.dumps({'tag_name': version,
-                                       'target_commitish': 'release',
-                                       'body': changes, 'draft': True}))
-    if r.status_code != 201:
-        raise Exception('Failed to create a release ' + str(r))
-    id = r.json()['id']
-    uploads_url = 'https://uploads.github.com/repos/fmtlib/fmt/releases'
-    package = 'fmt-{}.zip'.format(version)
-    r = requests.post(
-        '{}/{}/assets?name={}'.format(uploads_url, id, package),
-        headers={'Content-Type': 'application/zip'} | auth_headers,
-        data=open('build/fmt/' + package, 'rb'))
-    if r.status_code != 201:
-        raise Exception('Failed to upload an asset ' + str(r))
-
-
-if __name__ == '__main__':
-    args = docopt.docopt(__doc__)
-    if args.get('release'):
-        release(args)
-    elif args.get('site'):
-        update_site(create_build_env())
diff --git a/3rdparty/fmt/support/printable.py b/3rdparty/fmt/support/printable.py
deleted file mode 100644
index 7d23d3bb..00000000
--- a/3rdparty/fmt/support/printable.py
+++ /dev/null
@@ -1,201 +0,0 @@
-#!/usr/bin/env python3
-
-# This script is based on
-# https://github.com/rust-lang/rust/blob/master/library/core/src/unicode/printable.py
-# distributed under https://github.com/rust-lang/rust/blob/master/LICENSE-MIT.
-
-# This script uses the following Unicode tables:
-# - UnicodeData.txt
-
-
-from collections import namedtuple
-import csv
-import os
-import subprocess
-
-NUM_CODEPOINTS=0x110000
-
-def to_ranges(iter):
-    current = None
-    for i in iter:
-        if current is None or i != current[1] or i in (0x10000, 0x20000):
-            if current is not None:
-                yield tuple(current)
-            current = [i, i + 1]
-        else:
-            current[1] += 1
-    if current is not None:
-        yield tuple(current)
-
-def get_escaped(codepoints):
-    for c in codepoints:
-        if (c.class_ or "Cn") in "Cc Cf Cs Co Cn Zl Zp Zs".split() and c.value != ord(' '):
-            yield c.value
-
-def get_file(f):
-    try:
-        return open(os.path.basename(f))
-    except FileNotFoundError:
-        subprocess.run(["curl", "-O", f], check=True)
-        return open(os.path.basename(f))
-
-Codepoint = namedtuple('Codepoint', 'value class_')
-
-def get_codepoints(f):
-    r = csv.reader(f, delimiter=";")
-    prev_codepoint = 0
-    class_first = None
-    for row in r:
-        codepoint = int(row[0], 16)
-        name = row[1]
-        class_ = row[2]
-
-        if class_first is not None:
-            if not name.endswith("Last>"):
-                raise ValueError("Missing Last after First")
-
-        for c in range(prev_codepoint + 1, codepoint):
-            yield Codepoint(c, class_first)
-
-        class_first = None
-        if name.endswith("First>"):
-            class_first = class_
-
-        yield Codepoint(codepoint, class_)
-        prev_codepoint = codepoint
-
-    if class_first is not None:
-        raise ValueError("Missing Last after First")
-
-    for c in range(prev_codepoint + 1, NUM_CODEPOINTS):
-        yield Codepoint(c, None)
-
-def compress_singletons(singletons):
-    uppers = [] # (upper, # items in lowers)
-    lowers = []
-
-    for i in singletons:
-        upper = i >> 8
-        lower = i & 0xff
-        if len(uppers) == 0 or uppers[-1][0] != upper:
-            uppers.append((upper, 1))
-        else:
-            upper, count = uppers[-1]
-            uppers[-1] = upper, count + 1
-        lowers.append(lower)
-
-    return uppers, lowers
-
-def compress_normal(normal):
-    # lengths 0x00..0x7f are encoded as 00, 01, ..., 7e, 7f
-    # lengths 0x80..0x7fff are encoded as 80 80, 80 81, ..., ff fe, ff ff
-    compressed = [] # [truelen, (truelenaux), falselen, (falselenaux)]
-
-    prev_start = 0
-    for start, count in normal:
-        truelen = start - prev_start
-        falselen = count
-        prev_start = start + count
-
-        assert truelen < 0x8000 and falselen < 0x8000
-        entry = []
-        if truelen > 0x7f:
-            entry.append(0x80 | (truelen >> 8))
-            entry.append(truelen & 0xff)
-        else:
-            entry.append(truelen & 0x7f)
-        if falselen > 0x7f:
-            entry.append(0x80 | (falselen >> 8))
-            entry.append(falselen & 0xff)
-        else:
-            entry.append(falselen & 0x7f)
-
-        compressed.append(entry)
-
-    return compressed
-
-def print_singletons(uppers, lowers, uppersname, lowersname):
-    print("  static constexpr singleton {}[] = {{".format(uppersname))
-    for u, c in uppers:
-        print("    {{{:#04x}, {}}},".format(u, c))
-    print("  };")
-    print("  static constexpr unsigned char {}[] = {{".format(lowersname))
-    for i in range(0, len(lowers), 8):
-        print("    {}".format(" ".join("{:#04x},".format(l) for l in lowers[i:i+8])))
-    print("  };")
-
-def print_normal(normal, normalname):
-    print("  static constexpr unsigned char {}[] = {{".format(normalname))
-    for v in normal:
-        print("    {}".format(" ".join("{:#04x},".format(i) for i in v)))
-    print("  };")
-
-def main():
-    file = get_file("https://www.unicode.org/Public/UNIDATA/UnicodeData.txt")
-
-    codepoints = get_codepoints(file)
-
-    CUTOFF=0x10000
-    singletons0 = []
-    singletons1 = []
-    normal0 = []
-    normal1 = []
-    extra = []
-
-    for a, b in to_ranges(get_escaped(codepoints)):
-        if a > 2 * CUTOFF:
-            extra.append((a, b - a))
-        elif a == b - 1:
-            if a & CUTOFF:
-                singletons1.append(a & ~CUTOFF)
-            else:
-                singletons0.append(a)
-        elif a == b - 2:
-            if a & CUTOFF:
-                singletons1.append(a & ~CUTOFF)
-                singletons1.append((a + 1) & ~CUTOFF)
-            else:
-                singletons0.append(a)
-                singletons0.append(a + 1)
-        else:
-            if a >= 2 * CUTOFF:
-                extra.append((a, b - a))
-            elif a & CUTOFF:
-                normal1.append((a & ~CUTOFF, b - a))
-            else:
-                normal0.append((a, b - a))
-
-    singletons0u, singletons0l = compress_singletons(singletons0)
-    singletons1u, singletons1l = compress_singletons(singletons1)
-    normal0 = compress_normal(normal0)
-    normal1 = compress_normal(normal1)
-
-    print("""\
-inline auto is_printable(uint32_t cp) -> bool {\
-""")
-    print_singletons(singletons0u, singletons0l, 'singletons0', 'singletons0_lower')
-    print_singletons(singletons1u, singletons1l, 'singletons1', 'singletons1_lower')
-    print_normal(normal0, 'normal0')
-    print_normal(normal1, 'normal1')
-    print("""\
-  auto lower = static_cast<uint16_t>(cp);
-  if (cp < 0x10000) {
-    return is_printable(lower, singletons0,
-                        sizeof(singletons0) / sizeof(*singletons0),
-                        singletons0_lower, normal0, sizeof(normal0));
-  }
-  if (cp < 0x20000) {
-    return is_printable(lower, singletons1,
-                        sizeof(singletons1) / sizeof(*singletons1),
-                        singletons1_lower, normal1, sizeof(normal1));
-  }\
-""")
-    for a, b in extra:
-        print("  if (0x{:x} <= cp && cp < 0x{:x}) return false;".format(a, a + b))
-    print("""\
-  return cp < 0x{:x};
-}}\
-""".format(NUM_CODEPOINTS))
-
-if __name__ == '__main__':
-    main()
diff --git a/3rdparty/fmt/support/rst2md.py b/3rdparty/fmt/support/rst2md.py
deleted file mode 100644
index 3f072007..00000000
--- a/3rdparty/fmt/support/rst2md.py
+++ /dev/null
@@ -1,159 +0,0 @@
-#!/usr/bin/env python
-# reStructuredText (RST) to GitHub-flavored Markdown converter
-
-import re, sys
-from docutils import core, nodes, writers
-
-
-def is_github_ref(node):
-    return re.match('https://github.com/.*/(issues|pull)/.*', node['refuri'])
-
-
-class Translator(nodes.NodeVisitor):
-    def __init__(self, document):
-        nodes.NodeVisitor.__init__(self, document)
-        self.output = ''
-        self.indent = 0
-        self.preserve_newlines = False
-
-    def write(self, text):
-        self.output += text.replace('\n', '\n' + ' ' * self.indent)
-
-    def visit_document(self, node):
-        pass
-
-    def depart_document(self, node):
-        pass
-
-    def visit_section(self, node):
-        pass
-
-    def depart_section(self, node):
-        # Skip all sections except the first one.
-        raise nodes.StopTraversal
-
-    def visit_title(self, node):
-        self.version = re.match(r'(\d+\.\d+\.\d+).*', node.children[0]).group(1)
-        raise nodes.SkipChildren
-
-    def visit_title_reference(self, node):
-        raise Exception(node)
-
-    def depart_title(self, node):
-        pass
-
-    def visit_Text(self, node):
-        if not self.preserve_newlines:
-            node = node.replace('\n', ' ')
-        self.write(node)
-
-    def depart_Text(self, node):
-        pass
-
-    def visit_bullet_list(self, node):
-        pass
-
-    def depart_bullet_list(self, node):
-        pass
-
-    def visit_list_item(self, node):
-        self.write('* ')
-        self.indent += 2
-
-    def depart_list_item(self, node):
-        self.indent -= 2
-        self.write('\n\n')
-
-    def visit_paragraph(self, node):
-        self.write('\n\n')
-
-    def depart_paragraph(self, node):
-        pass
-
-    def visit_reference(self, node):
-        if not is_github_ref(node):
-            self.write('[')
-
-    def depart_reference(self, node):
-        if not is_github_ref(node):
-            self.write('](' + node['refuri'] + ')')
-
-    def visit_target(self, node):
-        pass
-
-    def depart_target(self, node):
-        pass
-
-    def visit_literal(self, node):
-        self.write('`')
-
-    def depart_literal(self, node):
-        self.write('`')
-
-    def visit_literal_block(self, node):
-        self.write('\n\n```')
-        if 'c++' in node['classes']:
-            self.write('c++')
-        self.write('\n')
-        self.preserve_newlines = True
-
-    def depart_literal_block(self, node):
-        self.write('\n```\n')
-        self.preserve_newlines = False
-
-    def visit_inline(self, node):
-        pass
-
-    def depart_inline(self, node):
-        pass
-
-    def visit_image(self, node):
-        self.write('![](' + node['uri'] + ')')
-
-    def depart_image(self, node):
-        pass
-
-    def write_row(self, row, widths):
-        for i, entry in enumerate(row):
-            text = entry[0][0] if len(entry) > 0 else ''
-            if i != 0:
-                self.write('|')
-            self.write('{:{}}'.format(text, widths[i]))
-        self.write('\n')
-
-    def visit_table(self, node):
-        table = node.children[0]
-        colspecs = table[:-2]
-        thead = table[-2]
-        tbody = table[-1]
-        widths = [int(cs['colwidth']) for cs in colspecs]
-        sep = '|'.join(['-' * w for w in widths]) + '\n'
-        self.write('\n\n')
-        self.write_row(thead[0], widths)
-        self.write(sep)
-        for row in tbody:
-            self.write_row(row, widths)
-        raise nodes.SkipChildren
-
-    def depart_table(self, node):
-        pass
-
-class MDWriter(writers.Writer):
-    """GitHub-flavored markdown writer"""
-
-    supported = ('md',)
-    """Formats this writer supports."""
-
-    def translate(self):
-        translator = Translator(self.document)
-        self.document.walkabout(translator)
-        self.output = (translator.output, translator.version)
-
-
-def convert(rst_path):
-    """Converts RST file to Markdown."""
-    return core.publish_file(source_path=rst_path, writer=MDWriter())
-
-
-if __name__ == '__main__':
-    convert(sys.argv[1])
diff --git a/3rdparty/fmt/support/rtd/conf.py b/3rdparty/fmt/support/rtd/conf.py
deleted file mode 100644
index 124fb9d4..00000000
--- a/3rdparty/fmt/support/rtd/conf.py
+++ /dev/null
@@ -1,7 +0,0 @@
-# Sphinx configuration for readthedocs.
-
-import os, sys
-
-master_doc = 'index'
-html_theme = 'theme'
-html_theme_path = ["."]
diff --git a/3rdparty/fmt/support/rtd/index.rst b/3rdparty/fmt/support/rtd/index.rst
deleted file mode 100644
index 7c88322f..00000000
--- a/3rdparty/fmt/support/rtd/index.rst
+++ /dev/null
@@ -1,2 +0,0 @@
-If you are not redirected automatically, follow the
-`link to the fmt documentation <https://fmt.dev/latest/>`_.
diff --git a/3rdparty/fmt/support/rtd/theme/layout.html b/3rdparty/fmt/support/rtd/theme/layout.html
deleted file mode 100644
index 29ebc55b..00000000
--- a/3rdparty/fmt/support/rtd/theme/layout.html
+++ /dev/null
@@ -1,17 +0,0 @@
-{% extends "basic/layout.html" %}
-
-{% block extrahead %}
-<meta charset="UTF-8">
-<meta http-equiv="refresh" content="1;url=https://fmt.dev/latest/">
-<script type="text/javascript">
-    window.location.href = "https://fmt.dev/latest/"
-</script>
-<title>Page Redirection</title>
-{% endblock %}
-
-{% block document %}
-If you are not redirected automatically, follow the <a href='https://fmt.dev/latest/'>link to the fmt documentation</a>.
-{% endblock %}
-
-{% block footer %}
-{% endblock %}
diff --git a/3rdparty/fmt/support/rtd/theme/theme.conf b/3rdparty/fmt/support/rtd/theme/theme.conf
deleted file mode 100644
index 89e03bbd..00000000
--- a/3rdparty/fmt/support/rtd/theme/theme.conf
+++ /dev/null
@@ -1,2 +0,0 @@
-[theme]
-inherit = basic
diff --git a/3rdparty/fmt/test/CMakeLists.txt b/3rdparty/fmt/test/CMakeLists.txt
deleted file mode 100644
index 7ed8d5f7..00000000
--- a/3rdparty/fmt/test/CMakeLists.txt
+++ /dev/null
@@ -1,244 +0,0 @@
-add_subdirectory(gtest)
-
-set(TEST_MAIN_SRC test-main.cc gtest-extra.cc gtest-extra.h util.cc)
-add_library(test-main STATIC ${TEST_MAIN_SRC})
-target_include_directories(test-main PUBLIC
-  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>)
-target_link_libraries(test-main gtest)
-
-include(CheckCXXCompilerFlag)
-
-function(add_fmt_executable name)
-  add_executable(${name} ${ARGN})
-  if (MINGW)
-    target_link_libraries(${name} -static-libgcc -static-libstdc++)
-  endif ()
-  # (Wstringop-overflow) - [meta-bug] bogus/missing -Wstringop-overflow warnings
-  #   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88443
-  # Bogus -Wstringop-overflow warning
-  #   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100395
-  # [10 Regression] spurious -Wstringop-overflow writing to a trailing array plus offset
-  #   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95353
-  if (CMAKE_CXX_COMPILER_ID MATCHES "GNU" AND
-      NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0)
-    target_link_libraries(${name} -Wno-stringop-overflow)
-  endif ()
-endfunction()
-
-# Adds a test.
-# Usage: add_fmt_test(name srcs...)
-function(add_fmt_test name)
-  cmake_parse_arguments(ADD_FMT_TEST "HEADER_ONLY;MODULE" "" "" ${ARGN})
-
-  set(sources ${name}.cc ${ADD_FMT_TEST_UNPARSED_ARGUMENTS})
-  if (ADD_FMT_TEST_HEADER_ONLY)
-    set(sources ${sources} ${TEST_MAIN_SRC} ../src/os.cc)
-    set(libs gtest fmt-header-only)
-    if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-      set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wno-weak-vtables)
-    endif ()
-  elseif (ADD_FMT_TEST_MODULE)
-    set(libs gtest test-module)
-    set_source_files_properties(${name}.cc PROPERTIES OBJECT_DEPENDS test-module)
-  else ()
-    set(libs test-main fmt)
-  endif ()
-  add_fmt_executable(${name} ${sources})
-  target_link_libraries(${name} ${libs})
-
-  # Define if certain C++ features can be used.
-  if (FMT_PEDANTIC)
-    target_compile_options(${name} PRIVATE ${PEDANTIC_COMPILE_FLAGS})
-  endif ()
-  if (FMT_WERROR)
-    target_compile_options(${name} PRIVATE ${WERROR_FLAG})
-  endif ()
-  add_test(NAME ${name} COMMAND ${name})
-endfunction()
-
-add_fmt_test(args-test)
-add_fmt_test(assert-test)
-add_fmt_test(chrono-test)
-add_fmt_test(color-test)
-add_fmt_test(core-test)
-add_fmt_test(gtest-extra-test)
-add_fmt_test(format-test mock-allocator.h)
-if (MSVC)
-  target_compile_options(format-test PRIVATE /bigobj)
-endif ()
-if (NOT (MSVC AND BUILD_SHARED_LIBS))
-  add_fmt_test(format-impl-test HEADER_ONLY header-only-test.cc)
-endif ()
-add_fmt_test(ostream-test)
-add_fmt_test(compile-test)
-add_fmt_test(compile-fp-test HEADER_ONLY)
-if (MSVC)
-  # Without this option, MSVC returns 199711L for the __cplusplus macro.
-  target_compile_options(compile-fp-test PRIVATE /Zc:__cplusplus)
-endif()
-add_fmt_test(printf-test)
-add_fmt_test(ranges-test ranges-odr-test.cc)
-add_fmt_test(scan-test)
-add_fmt_test(unicode-test HEADER_ONLY)
-if (MSVC)
-  target_compile_options(unicode-test PRIVATE /utf-8)
-endif ()
-add_fmt_test(xchar-test)
-add_fmt_test(enforce-checks-test)
-target_compile_definitions(enforce-checks-test PRIVATE
-                           -DFMT_ENFORCE_COMPILE_STRING)
-
-if (FMT_CAN_MODULE)
-  # The tests need {fmt} to be compiled as traditional library
-  # because of visibility of implementation details.
-  # If module support is present the module tests require a
-  # test-only module to be built from {fmt}
-  add_library(test-module OBJECT ${CMAKE_SOURCE_DIR}/src/fmt.cc)
-  target_compile_features(test-module PUBLIC ${FMT_REQUIRED_FEATURES})
-  target_include_directories(test-module PUBLIC
-    $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>)
-  enable_module(test-module)
-
-  add_fmt_test(module-test MODULE test-main.cc)
-  if (MSVC)
-    target_compile_options(test-module PRIVATE /utf-8 /Zc:__cplusplus
-                           /Zc:externConstexpr /Zc:inline)
-    target_compile_options(module-test PRIVATE /utf-8 /Zc:__cplusplus
-                           /Zc:externConstexpr /Zc:inline)
-  endif ()
-endif ()
-
-if (NOT DEFINED MSVC_STATIC_RUNTIME AND MSVC)
-  foreach (flag_var
-			 CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
-			 CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
-	if (${flag_var} MATCHES "^(/|-)(MT|MTd)")
-	  set(MSVC_STATIC_RUNTIME ON)
-	  break()
-	endif()
-  endforeach()
-endif()
-
-if (NOT MSVC_STATIC_RUNTIME)
-  add_fmt_executable(posix-mock-test
-    posix-mock-test.cc ../src/format.cc ${TEST_MAIN_SRC})
-  target_include_directories(
-    posix-mock-test PRIVATE ${PROJECT_SOURCE_DIR}/include)
-  target_link_libraries(posix-mock-test gtest)
-  if (FMT_PEDANTIC)
-    target_compile_options(posix-mock-test PRIVATE ${PEDANTIC_COMPILE_FLAGS})
-  endif ()
-  if (HAVE_STRTOD_L)
-    target_compile_definitions(posix-mock-test PRIVATE FMT_LOCALE)
-  endif ()
-  add_test(NAME posix-mock-test COMMAND posix-mock-test)
-  add_fmt_test(os-test)
-endif ()
-
-message(STATUS "FMT_PEDANTIC: ${FMT_PEDANTIC}")
-
-if (FMT_PEDANTIC)
-  # Test that the library can be compiled with exceptions disabled.
-  # -fno-exception is broken in icc: https://github.com/fmtlib/fmt/issues/822.
-  if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
-    check_cxx_compiler_flag(-fno-exceptions HAVE_FNO_EXCEPTIONS_FLAG)
-  endif ()
-  if (HAVE_FNO_EXCEPTIONS_FLAG)
-    add_library(noexception-test ../src/format.cc noexception-test.cc)
-    target_include_directories(
-      noexception-test PRIVATE ${PROJECT_SOURCE_DIR}/include)
-    target_compile_options(noexception-test PRIVATE -fno-exceptions)
-    if (FMT_PEDANTIC)
-      target_compile_options(noexception-test PRIVATE ${PEDANTIC_COMPILE_FLAGS})
-    endif ()
-  endif ()
-
-  # Test that the library compiles without locale.
-  add_library(nolocale-test ../src/format.cc)
-  target_include_directories(
-    nolocale-test PRIVATE ${PROJECT_SOURCE_DIR}/include)
-  target_compile_definitions(
-    nolocale-test PRIVATE FMT_STATIC_THOUSANDS_SEPARATOR=1)
-endif ()
-
-# These tests are disabled on Windows because they take too long.
-if (FMT_PEDANTIC AND NOT WIN32)
-  # Test if incorrect API usages produce compilation error.
-  add_test(compile-error-test ${CMAKE_CTEST_COMMAND}
-    --build-and-test
-    "${CMAKE_CURRENT_SOURCE_DIR}/compile-error-test"
-    "${CMAKE_CURRENT_BINARY_DIR}/compile-error-test"
-    --build-generator ${CMAKE_GENERATOR}
-    --build-makeprogram ${CMAKE_MAKE_PROGRAM}
-    --build-options
-    "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
-    "-DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}"
-    "-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}"
-    "-DFMT_DIR=${CMAKE_SOURCE_DIR}"
-    "-DSUPPORTS_USER_DEFINED_LITERALS=${SUPPORTS_USER_DEFINED_LITERALS}")
-
-  # Test if the targets are found from the build directory.
-  add_test(find-package-test ${CMAKE_CTEST_COMMAND}
-    -C ${CMAKE_BUILD_TYPE}
-    --build-and-test
-    "${CMAKE_CURRENT_SOURCE_DIR}/find-package-test"
-    "${CMAKE_CURRENT_BINARY_DIR}/find-package-test"
-    --build-generator ${CMAKE_GENERATOR}
-    --build-makeprogram ${CMAKE_MAKE_PROGRAM}
-    --build-options
-    "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
-    "-DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}"
-    "-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}"
-    "-DFMT_DIR=${PROJECT_BINARY_DIR}"
-    "-DPEDANTIC_COMPILE_FLAGS=${PEDANTIC_COMPILE_FLAGS}"
-    "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}")
-
-  # Test if the targets are found when add_subdirectory is used.
-  add_test(add-subdirectory-test ${CMAKE_CTEST_COMMAND}
-    -C ${CMAKE_BUILD_TYPE}
-    --build-and-test
-    "${CMAKE_CURRENT_SOURCE_DIR}/add-subdirectory-test"
-    "${CMAKE_CURRENT_BINARY_DIR}/add-subdirectory-test"
-    --build-generator ${CMAKE_GENERATOR}
-    --build-makeprogram ${CMAKE_MAKE_PROGRAM}
-    --build-options
-    "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
-    "-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}"
-    "-DPEDANTIC_COMPILE_FLAGS=${PEDANTIC_COMPILE_FLAGS}"
-    "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}")
-endif ()
-
-# This test are disabled on Windows because it is only *NIX issue.
-if (FMT_PEDANTIC AND NOT WIN32)
-  add_test(static-export-test ${CMAKE_CTEST_COMMAND}
-    -C ${CMAKE_BUILD_TYPE}
-    --build-and-test
-    "${CMAKE_CURRENT_SOURCE_DIR}/static-export-test"
-    "${CMAKE_CURRENT_BINARY_DIR}/static-export-test"
-    --build-generator ${CMAKE_GENERATOR}
-    --build-makeprogram ${CMAKE_MAKE_PROGRAM}
-    --build-options
-    "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
-    "-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}"
-    "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}")
-endif ()
-
-# Activate optional CUDA tests if CUDA is found. For version selection see
-# https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#cpp14-language-features
-if (FMT_CUDA_TEST)
-  if (${CMAKE_VERSION} VERSION_LESS 3.15)
-    find_package(CUDA 9.0)
-  else ()
-    include(CheckLanguage)
-    check_language(CUDA)
-    if (CMAKE_CUDA_COMPILER)
-      enable_language(CUDA OPTIONAL)
-      set(CUDA_FOUND TRUE)
-    endif ()
-  endif ()
-
-  if (CUDA_FOUND)
-    add_subdirectory(cuda-test)
-    add_test(NAME cuda-test COMMAND fmt-in-cuda-test)
-  endif ()
-endif ()
diff --git a/3rdparty/fmt/test/add-subdirectory-test/CMakeLists.txt b/3rdparty/fmt/test/add-subdirectory-test/CMakeLists.txt
deleted file mode 100644
index e08d0cf7..00000000
--- a/3rdparty/fmt/test/add-subdirectory-test/CMakeLists.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-cmake_minimum_required(VERSION 3.1...3.18)
-
-project(fmt-test CXX)
-
-add_subdirectory(../.. fmt)
-
-add_executable(library-test main.cc)
-target_include_directories(library-test PUBLIC SYSTEM .)
-target_compile_options(library-test PRIVATE ${PEDANTIC_COMPILE_FLAGS})
-target_link_libraries(library-test fmt::fmt)
-
-if (TARGET fmt::fmt-header-only)
-  add_executable(header-only-test main.cc)
-  target_include_directories(header-only-test PUBLIC SYSTEM .)
-  target_compile_options(header-only-test PRIVATE ${PEDANTIC_COMPILE_FLAGS})
-  target_link_libraries(header-only-test fmt::fmt-header-only)
-endif ()
diff --git a/3rdparty/fmt/test/add-subdirectory-test/main.cc b/3rdparty/fmt/test/add-subdirectory-test/main.cc
deleted file mode 100644
index fcdf232e..00000000
--- a/3rdparty/fmt/test/add-subdirectory-test/main.cc
+++ /dev/null
@@ -1,5 +0,0 @@
-#include "fmt/core.h"
-
-int main(int argc, char** argv) {
-  for (int i = 0; i < argc; ++i) fmt::print("{}: {}\n", i, argv[i]);
-}
diff --git a/3rdparty/fmt/test/args-test.cc b/3rdparty/fmt/test/args-test.cc
deleted file mode 100644
index aa01fa4e..00000000
--- a/3rdparty/fmt/test/args-test.cc
+++ /dev/null
@@ -1,186 +0,0 @@
-// Formatting library for C++ - dynamic argument store tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "fmt/args.h"
-
-#include <memory>
-
-#include "gtest/gtest.h"
-
-TEST(args_test, basic) {
-  fmt::dynamic_format_arg_store<fmt::format_context> store;
-  store.push_back(42);
-  store.push_back("abc1");
-  store.push_back(1.5f);
-  EXPECT_EQ("42 and abc1 and 1.5", fmt::vformat("{} and {} and {}", store));
-}
-
-TEST(args_test, strings_and_refs) {
-  // Unfortunately the tests are compiled with old ABI so strings use COW.
-  fmt::dynamic_format_arg_store<fmt::format_context> store;
-  char str[] = "1234567890";
-  store.push_back(str);
-  store.push_back(std::cref(str));
-  store.push_back(fmt::string_view{str});
-  str[0] = 'X';
-
-  auto result = fmt::vformat("{} and {} and {}", store);
-  EXPECT_EQ("1234567890 and X234567890 and X234567890", result);
-}
-
-struct custom_type {
-  int i = 0;
-};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<custom_type> {
-  auto parse(format_parse_context& ctx) const -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  template <typename FormatContext>
-  auto format(const custom_type& p, FormatContext& ctx) -> decltype(ctx.out()) {
-    return format_to(ctx.out(), "cust={}", p.i);
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(args_test, custom_format) {
-  fmt::dynamic_format_arg_store<fmt::format_context> store;
-  auto c = custom_type();
-  store.push_back(c);
-  ++c.i;
-  store.push_back(c);
-  ++c.i;
-  store.push_back(std::cref(c));
-  ++c.i;
-  auto result = fmt::vformat("{} and {} and {}", store);
-  EXPECT_EQ("cust=0 and cust=1 and cust=3", result);
-}
-
-struct to_stringable {
-  friend fmt::string_view to_string_view(to_stringable) { return {}; }
-};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<to_stringable> {
-  auto parse(format_parse_context& ctx) const -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  auto format(to_stringable, format_context& ctx) -> decltype(ctx.out()) {
-    return ctx.out();
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(args_test, to_string_and_formatter) {
-  fmt::dynamic_format_arg_store<fmt::format_context> store;
-  auto s = to_stringable();
-  store.push_back(s);
-  store.push_back(std::cref(s));
-  fmt::vformat("", store);
-}
-
-TEST(args_test, named_int) {
-  fmt::dynamic_format_arg_store<fmt::format_context> store;
-  store.push_back(fmt::arg("a1", 42));
-  EXPECT_EQ("42", fmt::vformat("{a1}", store));
-}
-
-TEST(args_test, named_strings) {
-  fmt::dynamic_format_arg_store<fmt::format_context> store;
-  char str[] = "1234567890";
-  store.push_back(fmt::arg("a1", str));
-  store.push_back(fmt::arg("a2", std::cref(str)));
-  str[0] = 'X';
-  EXPECT_EQ("1234567890 and X234567890", fmt::vformat("{a1} and {a2}", store));
-}
-
-TEST(args_test, named_arg_by_ref) {
-  fmt::dynamic_format_arg_store<fmt::format_context> store;
-  char band[] = "Rolling Stones";
-  store.push_back(fmt::arg("band", std::cref(band)));
-  band[9] = 'c';  // Changing band affects the output.
-  EXPECT_EQ(fmt::vformat("{band}", store), "Rolling Scones");
-}
-
-TEST(args_test, named_custom_format) {
-  fmt::dynamic_format_arg_store<fmt::format_context> store;
-  auto c = custom_type();
-  store.push_back(fmt::arg("c1", c));
-  ++c.i;
-  store.push_back(fmt::arg("c2", c));
-  ++c.i;
-  store.push_back(fmt::arg("c_ref", std::cref(c)));
-  ++c.i;
-  auto result = fmt::vformat("{c1} and {c2} and {c_ref}", store);
-  EXPECT_EQ("cust=0 and cust=1 and cust=3", result);
-}
-
-TEST(args_test, clear) {
-  fmt::dynamic_format_arg_store<fmt::format_context> store;
-  store.push_back(42);
-
-  auto result = fmt::vformat("{}", store);
-  EXPECT_EQ("42", result);
-
-  store.push_back(43);
-  result = fmt::vformat("{} and {}", store);
-  EXPECT_EQ("42 and 43", result);
-
-  store.clear();
-  store.push_back(44);
-  result = fmt::vformat("{}", store);
-  EXPECT_EQ("44", result);
-}
-
-TEST(args_test, reserve) {
-  fmt::dynamic_format_arg_store<fmt::format_context> store;
-  store.reserve(2, 1);
-  store.push_back(1.5f);
-  store.push_back(fmt::arg("a1", 42));
-  auto result = fmt::vformat("{a1} and {}", store);
-  EXPECT_EQ("42 and 1.5", result);
-}
-
-struct copy_throwable {
-  copy_throwable() {}
-  copy_throwable(const copy_throwable&) { throw "deal with it"; }
-};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<copy_throwable> {
-  auto parse(format_parse_context& ctx) const -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-  auto format(copy_throwable, format_context& ctx) -> decltype(ctx.out()) {
-    return ctx.out();
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(args_test, throw_on_copy) {
-  fmt::dynamic_format_arg_store<fmt::format_context> store;
-  store.push_back(std::string("foo"));
-  try {
-    store.push_back(copy_throwable());
-  } catch (...) {
-  }
-  EXPECT_EQ(fmt::vformat("{}", store), "foo");
-}
-
-TEST(args_test, move_constructor) {
-  using store_type = fmt::dynamic_format_arg_store<fmt::format_context>;
-  auto store = std::unique_ptr<store_type>(new store_type());
-  store->push_back(42);
-  store->push_back(std::string("foo"));
-  store->push_back(fmt::arg("a1", "foo"));
-  auto moved_store = std::move(*store);
-  store.reset();
-  EXPECT_EQ(fmt::vformat("{} {} {a1}", moved_store), "42 foo foo");
-}
diff --git a/3rdparty/fmt/test/assert-test.cc b/3rdparty/fmt/test/assert-test.cc
deleted file mode 100644
index c74e617e..00000000
--- a/3rdparty/fmt/test/assert-test.cc
+++ /dev/null
@@ -1,31 +0,0 @@
-// Formatting library for C++ - FMT_ASSERT test
-//
-// It is a separate test to minimize the number of EXPECT_DEBUG_DEATH checks
-// which are slow on some platforms. In other tests FMT_ASSERT is made to throw
-// an exception which is much faster and easier to check.
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "fmt/core.h"
-#include "gtest/gtest.h"
-
-TEST(assert_test, fail) {
-#if GTEST_HAS_DEATH_TEST
-  EXPECT_DEBUG_DEATH(FMT_ASSERT(false, "don't panic!"), "don't panic!");
-#else
-  fmt::print("warning: death tests are not supported\n");
-#endif
-}
-
-TEST(assert_test, dangling_else) {
-  bool test_condition = false;
-  bool executed_else = false;
-  if (test_condition)
-    FMT_ASSERT(true, "");
-  else
-    executed_else = true;
-  EXPECT_TRUE(executed_else);
-}
diff --git a/3rdparty/fmt/test/chrono-test.cc b/3rdparty/fmt/test/chrono-test.cc
deleted file mode 100644
index 42360e5f..00000000
--- a/3rdparty/fmt/test/chrono-test.cc
+++ /dev/null
@@ -1,625 +0,0 @@
-// Formatting library for C++ - time formatting tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "fmt/chrono.h"
-
-#include <ctime>
-#include <vector>
-
-#include "gtest-extra.h"  // EXPECT_THROW_MSG
-#include "util.h"         // get_locale
-
-using fmt::runtime;
-
-using testing::Contains;
-
-auto make_tm() -> std::tm {
-  auto time = std::tm();
-  time.tm_mday = 1;
-  return time;
-}
-
-auto make_hour(int h) -> std::tm {
-  auto time = make_tm();
-  time.tm_hour = h;
-  return time;
-}
-
-auto make_minute(int m) -> std::tm {
-  auto time = make_tm();
-  time.tm_min = m;
-  return time;
-}
-
-auto make_second(int s) -> std::tm {
-  auto time = make_tm();
-  time.tm_sec = s;
-  return time;
-}
-
-std::string system_strftime(const std::string& format, const std::tm* timeptr,
-                            std::locale* locptr = nullptr) {
-  auto loc = locptr ? *locptr : std::locale::classic();
-  auto& facet = std::use_facet<std::time_put<char>>(loc);
-  std::ostringstream os;
-  os.imbue(loc);
-  facet.put(os, os, ' ', timeptr, format.c_str(),
-            format.c_str() + format.size());
-#ifdef _WIN32
-  // Workaround a bug in older versions of Universal CRT.
-  auto str = os.str();
-  if (str == "-0000") str = "+0000";
-  return str;
-#else
-  return os.str();
-#endif
-}
-
-FMT_CONSTEXPR std::tm make_tm(int year, int mon, int mday, int hour, int min,
-                              int sec) {
-  auto tm = std::tm();
-  tm.tm_sec = sec;
-  tm.tm_min = min;
-  tm.tm_hour = hour;
-  tm.tm_mday = mday;
-  tm.tm_mon = mon - 1;
-  tm.tm_year = year - 1900;
-  return tm;
-}
-
-TEST(chrono_test, format_tm) {
-  auto tm = std::tm();
-  tm.tm_year = 116;
-  tm.tm_mon = 3;
-  tm.tm_mday = 25;
-  tm.tm_hour = 11;
-  tm.tm_min = 22;
-  tm.tm_sec = 33;
-  EXPECT_EQ(fmt::format("The date is {:%Y-%m-%d %H:%M:%S}.", tm),
-            "The date is 2016-04-25 11:22:33.");
-  EXPECT_EQ(fmt::format("{:%Y}", tm), "2016");
-  EXPECT_EQ(fmt::format("{:%C}", tm), "20");
-  EXPECT_EQ(fmt::format("{:%C%y}", tm), fmt::format("{:%Y}", tm));
-  EXPECT_EQ(fmt::format("{:%e}", tm), "25");
-  EXPECT_EQ(fmt::format("{:%D}", tm), "04/25/16");
-  EXPECT_EQ(fmt::format("{:%F}", tm), "2016-04-25");
-  EXPECT_EQ(fmt::format("{:%T}", tm), "11:22:33");
-
-  // Short year
-  tm.tm_year = 999 - 1900;
-  tm.tm_mon = 0;   // for %G
-  tm.tm_mday = 2;  // for %G
-  tm.tm_wday = 3;  // for %G
-  tm.tm_yday = 1;  // for %G
-  EXPECT_EQ(fmt::format("{:%Y}", tm), "0999");
-  EXPECT_EQ(fmt::format("{:%C%y}", tm), "0999");
-  EXPECT_EQ(fmt::format("{:%G}", tm), "0999");
-
-  tm.tm_year = 27 - 1900;
-  EXPECT_EQ(fmt::format("{:%Y}", tm), "0027");
-  EXPECT_EQ(fmt::format("{:%C%y}", tm), "0027");
-
-  // Overflow year
-  tm.tm_year = 2147483647;
-  EXPECT_EQ(fmt::format("{:%Y}", tm), "2147485547");
-
-  tm.tm_year = -2147483648;
-  EXPECT_EQ(fmt::format("{:%Y}", tm), "-2147481748");
-
-  // for week on the year
-  // https://www.cl.cam.ac.uk/~mgk25/iso-time.html
-  std::vector<std::tm> tm_list = {
-      make_tm(1975, 12, 29, 12, 14, 16),  // W01
-      make_tm(1977, 1, 2, 12, 14, 16),    // W53
-      make_tm(1999, 12, 27, 12, 14, 16),  // W52
-      make_tm(1999, 12, 31, 12, 14, 16),  // W52
-      make_tm(2000, 1, 1, 12, 14, 16),    // W52
-      make_tm(2000, 1, 2, 12, 14, 16),    // W52
-      make_tm(2000, 1, 3, 12, 14, 16)     // W1
-  };
-  const std::string iso_week_spec = "%Y-%m-%d: %G %g %V";
-  for (auto ctm : tm_list) {
-    // Calculate tm_yday, tm_wday, etc.
-    std::time_t t = std::mktime(&ctm);
-    tm = *std::localtime(&t);
-
-    auto fmt_spec = fmt::format("{{:{}}}", iso_week_spec);
-    EXPECT_EQ(system_strftime(iso_week_spec, &tm),
-              fmt::format(fmt::runtime(fmt_spec), tm));
-  }
-
-  // Every day from 1970-01-01
-  std::time_t time_now = std::time(nullptr);
-  for (std::time_t t = 6 * 3600; t < time_now; t += 86400) {
-    tm = *std::localtime(&t);
-
-    auto fmt_spec = fmt::format("{{:{}}}", iso_week_spec);
-    EXPECT_EQ(system_strftime(iso_week_spec, &tm),
-              fmt::format(fmt::runtime(fmt_spec), tm));
-  }
-}
-
-// MSVC:
-//  minkernel\crts\ucrt\src\appcrt\time\wcsftime.cpp(971) : Assertion failed:
-//  timeptr->tm_year >= -1900 && timeptr->tm_year <= 8099
-#ifndef _WIN32
-TEST(chrono_test, format_tm_future) {
-  auto tm = std::tm();
-  tm.tm_year = 10445;  // 10000+ years
-  tm.tm_mon = 3;
-  tm.tm_mday = 25;
-  tm.tm_hour = 11;
-  tm.tm_min = 22;
-  tm.tm_sec = 33;
-  EXPECT_EQ(fmt::format("The date is {:%Y-%m-%d %H:%M:%S}.", tm),
-            "The date is 12345-04-25 11:22:33.");
-  EXPECT_EQ(fmt::format("{:%Y}", tm), "12345");
-  EXPECT_EQ(fmt::format("{:%C}", tm), "123");
-  EXPECT_EQ(fmt::format("{:%C%y}", tm), fmt::format("{:%Y}", tm));
-  EXPECT_EQ(fmt::format("{:%D}", tm), "04/25/45");
-  EXPECT_EQ(fmt::format("{:%F}", tm), "12345-04-25");
-  EXPECT_EQ(fmt::format("{:%T}", tm), "11:22:33");
-}
-
-TEST(chrono_test, format_tm_past) {
-  auto tm = std::tm();
-  tm.tm_year = -2001;
-  tm.tm_mon = 3;
-  tm.tm_mday = 25;
-  tm.tm_hour = 11;
-  tm.tm_min = 22;
-  tm.tm_sec = 33;
-  EXPECT_EQ(fmt::format("The date is {:%Y-%m-%d %H:%M:%S}.", tm),
-            "The date is -101-04-25 11:22:33.");
-  EXPECT_EQ(fmt::format("{:%Y}", tm), "-101");
-
-  // macOS  %C - "-1"
-  // Linux  %C - "-2"
-  // fmt    %C - "-1"
-  EXPECT_EQ(fmt::format("{:%C}", tm), "-1");
-  EXPECT_EQ(fmt::format("{:%C%y}", tm), fmt::format("{:%Y}", tm));
-
-  // macOS  %D - "04/25/01" (%y)
-  // Linux  %D - "04/25/99" (%y)
-  // fmt    %D - "04/25/01" (%y)
-  EXPECT_EQ(fmt::format("{:%D}", tm), "04/25/01");
-
-  EXPECT_EQ(fmt::format("{:%F}", tm), "-101-04-25");
-  EXPECT_EQ(fmt::format("{:%T}", tm), "11:22:33");
-
-  tm.tm_year = -1901;  // -1
-  EXPECT_EQ(fmt::format("{:%Y}", tm), "-001");
-  EXPECT_EQ(fmt::format("{:%C%y}", tm), fmt::format("{:%Y}", tm));
-
-  tm.tm_year = -1911;  // -11
-  EXPECT_EQ(fmt::format("{:%Y}", tm), "-011");
-  EXPECT_EQ(fmt::format("{:%C%y}", tm), fmt::format("{:%Y}", tm));
-}
-#endif
-
-TEST(chrono_test, grow_buffer) {
-  auto s = std::string("{:");
-  for (int i = 0; i < 30; ++i) s += "%c";
-  s += "}\n";
-  auto t = std::time(nullptr);
-  (void)fmt::format(fmt::runtime(s), *std::localtime(&t));
-}
-
-TEST(chrono_test, format_to_empty_container) {
-  auto time = std::tm();
-  time.tm_sec = 42;
-  auto s = std::string();
-  fmt::format_to(std::back_inserter(s), "{:%S}", time);
-  EXPECT_EQ(s, "42");
-}
-
-TEST(chrono_test, empty_result) { EXPECT_EQ(fmt::format("{}", std::tm()), ""); }
-
-auto equal(const std::tm& lhs, const std::tm& rhs) -> bool {
-  return lhs.tm_sec == rhs.tm_sec && lhs.tm_min == rhs.tm_min &&
-         lhs.tm_hour == rhs.tm_hour && lhs.tm_mday == rhs.tm_mday &&
-         lhs.tm_mon == rhs.tm_mon && lhs.tm_year == rhs.tm_year &&
-         lhs.tm_wday == rhs.tm_wday && lhs.tm_yday == rhs.tm_yday &&
-         lhs.tm_isdst == rhs.tm_isdst;
-}
-
-TEST(chrono_test, localtime) {
-  auto t = std::time(nullptr);
-  auto tm = *std::localtime(&t);
-  EXPECT_TRUE(equal(tm, fmt::localtime(t)));
-}
-
-TEST(chrono_test, gmtime) {
-  auto t = std::time(nullptr);
-  auto tm = *std::gmtime(&t);
-  EXPECT_TRUE(equal(tm, fmt::gmtime(t)));
-}
-
-template <typename TimePoint> auto strftime_full(TimePoint tp) -> std::string {
-  auto t = std::chrono::system_clock::to_time_t(tp);
-  auto tm = *std::localtime(&t);
-  return system_strftime("%Y-%m-%d %H:%M:%S", &tm);
-}
-
-TEST(chrono_test, time_point) {
-  auto t1 = std::chrono::system_clock::now();
-  EXPECT_EQ(strftime_full(t1), fmt::format("{:%Y-%m-%d %H:%M:%S}", t1));
-  EXPECT_EQ(strftime_full(t1), fmt::format("{}", t1));
-  using time_point =
-      std::chrono::time_point<std::chrono::system_clock, std::chrono::seconds>;
-  auto t2 = time_point(std::chrono::seconds(42));
-  EXPECT_EQ(strftime_full(t2), fmt::format("{:%Y-%m-%d %H:%M:%S}", t2));
-
-  std::vector<std::string> spec_list = {
-      "%%",  "%n",  "%t",  "%Y",  "%EY", "%y",  "%Oy", "%Ey", "%C",
-      "%EC", "%G",  "%g",  "%b",  "%h",  "%B",  "%m",  "%Om", "%U",
-      "%OU", "%W",  "%OW", "%V",  "%OV", "%j",  "%d",  "%Od", "%e",
-      "%Oe", "%a",  "%A",  "%w",  "%Ow", "%u",  "%Ou", "%H",  "%OH",
-      "%I",  "%OI", "%M",  "%OM", "%S",  "%OS", "%x",  "%Ex", "%X",
-      "%EX", "%D",  "%F",  "%R",  "%T",  "%p",  "%z",  "%Z"};
-  spec_list.push_back("%Y-%m-%d %H:%M:%S");
-#ifndef _WIN32
-  // Disabled on Windows because these formats are not consistent among
-  // platforms.
-  spec_list.insert(spec_list.end(), {"%c", "%Ec", "%r"});
-#endif
-
-  for (const auto& spec : spec_list) {
-    auto t = std::chrono::system_clock::to_time_t(t1);
-    auto tm = *std::localtime(&t);
-
-    auto sys_output = system_strftime(spec, &tm);
-
-    auto fmt_spec = fmt::format("{{:{}}}", spec);
-    EXPECT_EQ(sys_output, fmt::format(fmt::runtime(fmt_spec), t1));
-    EXPECT_EQ(sys_output, fmt::format(fmt::runtime(fmt_spec), tm));
-  }
-}
-
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-
-TEST(chrono_test, format_default) {
-  EXPECT_EQ("42s", fmt::format("{}", std::chrono::seconds(42)));
-  EXPECT_EQ("42as",
-            fmt::format("{}", std::chrono::duration<int, std::atto>(42)));
-  EXPECT_EQ("42fs",
-            fmt::format("{}", std::chrono::duration<int, std::femto>(42)));
-  EXPECT_EQ("42ps",
-            fmt::format("{}", std::chrono::duration<int, std::pico>(42)));
-  EXPECT_EQ("42ns", fmt::format("{}", std::chrono::nanoseconds(42)));
-  EXPECT_EQ("42µs", fmt::format("{}", std::chrono::microseconds(42)));
-  EXPECT_EQ("42ms", fmt::format("{}", std::chrono::milliseconds(42)));
-  EXPECT_EQ("42cs",
-            fmt::format("{}", std::chrono::duration<int, std::centi>(42)));
-  EXPECT_EQ("42ds",
-            fmt::format("{}", std::chrono::duration<int, std::deci>(42)));
-  EXPECT_EQ("42s", fmt::format("{}", std::chrono::seconds(42)));
-  EXPECT_EQ("42das",
-            fmt::format("{}", std::chrono::duration<int, std::deca>(42)));
-  EXPECT_EQ("42hs",
-            fmt::format("{}", std::chrono::duration<int, std::hecto>(42)));
-  EXPECT_EQ("42ks",
-            fmt::format("{}", std::chrono::duration<int, std::kilo>(42)));
-  EXPECT_EQ("42Ms",
-            fmt::format("{}", std::chrono::duration<int, std::mega>(42)));
-  EXPECT_EQ("42Gs",
-            fmt::format("{}", std::chrono::duration<int, std::giga>(42)));
-  EXPECT_EQ("42Ts",
-            fmt::format("{}", std::chrono::duration<int, std::tera>(42)));
-  EXPECT_EQ("42Ps",
-            fmt::format("{}", std::chrono::duration<int, std::peta>(42)));
-  EXPECT_EQ("42Es",
-            fmt::format("{}", std::chrono::duration<int, std::exa>(42)));
-  EXPECT_EQ("42m", fmt::format("{}", std::chrono::minutes(42)));
-  EXPECT_EQ("42h", fmt::format("{}", std::chrono::hours(42)));
-  EXPECT_EQ(
-      "42[15]s",
-      fmt::format("{}", std::chrono::duration<int, std::ratio<15, 1>>(42)));
-  EXPECT_EQ(
-      "42[15/4]s",
-      fmt::format("{}", std::chrono::duration<int, std::ratio<15, 4>>(42)));
-}
-
-TEST(chrono_test, align) {
-  auto s = std::chrono::seconds(42);
-  EXPECT_EQ("42s  ", fmt::format("{:5}", s));
-  EXPECT_EQ("42s  ", fmt::format("{:{}}", s, 5));
-  EXPECT_EQ("  42s", fmt::format("{:>5}", s));
-  EXPECT_EQ("**42s**", fmt::format("{:*^7}", s));
-  EXPECT_EQ("03:25:45    ",
-            fmt::format("{:12%H:%M:%S}", std::chrono::seconds(12345)));
-  EXPECT_EQ("    03:25:45",
-            fmt::format("{:>12%H:%M:%S}", std::chrono::seconds(12345)));
-  EXPECT_EQ("~~03:25:45~~",
-            fmt::format("{:~^12%H:%M:%S}", std::chrono::seconds(12345)));
-  EXPECT_EQ("03:25:45    ",
-            fmt::format("{:{}%H:%M:%S}", std::chrono::seconds(12345), 12));
-}
-
-TEST(chrono_test, format_specs) {
-  EXPECT_EQ("%", fmt::format("{:%%}", std::chrono::seconds(0)));
-  EXPECT_EQ("\n", fmt::format("{:%n}", std::chrono::seconds(0)));
-  EXPECT_EQ("\t", fmt::format("{:%t}", std::chrono::seconds(0)));
-  EXPECT_EQ("00", fmt::format("{:%S}", std::chrono::seconds(0)));
-  EXPECT_EQ("00", fmt::format("{:%S}", std::chrono::seconds(60)));
-  EXPECT_EQ("42", fmt::format("{:%S}", std::chrono::seconds(42)));
-  EXPECT_EQ("01.234", fmt::format("{:%S}", std::chrono::milliseconds(1234)));
-  EXPECT_EQ("00", fmt::format("{:%M}", std::chrono::minutes(0)));
-  EXPECT_EQ("00", fmt::format("{:%M}", std::chrono::minutes(60)));
-  EXPECT_EQ("42", fmt::format("{:%M}", std::chrono::minutes(42)));
-  EXPECT_EQ("01", fmt::format("{:%M}", std::chrono::seconds(61)));
-  EXPECT_EQ("00", fmt::format("{:%H}", std::chrono::hours(0)));
-  EXPECT_EQ("00", fmt::format("{:%H}", std::chrono::hours(24)));
-  EXPECT_EQ("14", fmt::format("{:%H}", std::chrono::hours(14)));
-  EXPECT_EQ("01", fmt::format("{:%H}", std::chrono::minutes(61)));
-  EXPECT_EQ("12", fmt::format("{:%I}", std::chrono::hours(0)));
-  EXPECT_EQ("12", fmt::format("{:%I}", std::chrono::hours(12)));
-  EXPECT_EQ("12", fmt::format("{:%I}", std::chrono::hours(24)));
-  EXPECT_EQ("04", fmt::format("{:%I}", std::chrono::hours(4)));
-  EXPECT_EQ("02", fmt::format("{:%I}", std::chrono::hours(14)));
-  EXPECT_EQ("03:25:45",
-            fmt::format("{:%H:%M:%S}", std::chrono::seconds(12345)));
-  EXPECT_EQ("03:25", fmt::format("{:%R}", std::chrono::seconds(12345)));
-  EXPECT_EQ("03:25:45", fmt::format("{:%T}", std::chrono::seconds(12345)));
-  EXPECT_EQ("12345", fmt::format("{:%Q}", std::chrono::seconds(12345)));
-  EXPECT_EQ("s", fmt::format("{:%q}", std::chrono::seconds(12345)));
-}
-
-TEST(chrono_test, invalid_specs) {
-  auto sec = std::chrono::seconds(0);
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%a}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%A}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%c}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%x}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%Ex}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%X}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%EX}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%D}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%F}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%Ec}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%w}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%u}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%b}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%B}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%z}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%Z}"), sec), fmt::format_error,
-                   "no date");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%Eq}"), sec), fmt::format_error,
-                   "invalid format");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:%Oq}"), sec), fmt::format_error,
-                   "invalid format");
-}
-
-auto format_tm(const std::tm& time, fmt::string_view spec,
-               const std::locale& loc) -> std::string {
-  auto& facet = std::use_facet<std::time_put<char>>(loc);
-  std::ostringstream os;
-  os.imbue(loc);
-  facet.put(os, os, ' ', &time, spec.begin(), spec.end());
-  return os.str();
-}
-
-TEST(chrono_test, locale) {
-  auto loc = get_locale("ja_JP.utf8");
-  if (loc == std::locale::classic()) return;
-#  define EXPECT_TIME(spec, time, duration)                     \
-    {                                                           \
-      auto jp_loc = std::locale("ja_JP.utf8");                  \
-      EXPECT_EQ(format_tm(time, spec, jp_loc),                  \
-                fmt::format(jp_loc, "{:L" spec "}", duration)); \
-    }
-  EXPECT_TIME("%OH", make_hour(14), std::chrono::hours(14));
-  EXPECT_TIME("%OI", make_hour(14), std::chrono::hours(14));
-  EXPECT_TIME("%OM", make_minute(42), std::chrono::minutes(42));
-  EXPECT_TIME("%OS", make_second(42), std::chrono::seconds(42));
-  auto time = make_tm();
-  time.tm_hour = 3;
-  time.tm_min = 25;
-  time.tm_sec = 45;
-  auto sec = std::chrono::seconds(12345);
-  EXPECT_TIME("%r", time, sec);
-  EXPECT_TIME("%p", time, sec);
-}
-
-using dms = std::chrono::duration<double, std::milli>;
-
-TEST(chrono_test, format_default_fp) {
-  typedef std::chrono::duration<float> fs;
-  EXPECT_EQ("1.234s", fmt::format("{}", fs(1.234)));
-  typedef std::chrono::duration<float, std::milli> fms;
-  EXPECT_EQ("1.234ms", fmt::format("{}", fms(1.234)));
-  typedef std::chrono::duration<double> ds;
-  EXPECT_EQ("1.234s", fmt::format("{}", ds(1.234)));
-  EXPECT_EQ("1.234ms", fmt::format("{}", dms(1.234)));
-}
-
-TEST(chrono_test, format_precision) {
-  EXPECT_THROW_MSG(
-      (void)fmt::format(runtime("{:.2}"), std::chrono::seconds(42)),
-      fmt::format_error, "precision not allowed for this argument type");
-  EXPECT_EQ("1ms", fmt::format("{:.0}", dms(1.234)));
-  EXPECT_EQ("1.2ms", fmt::format("{:.1}", dms(1.234)));
-  EXPECT_EQ("1.23ms", fmt::format("{:.{}}", dms(1.234), 2));
-
-  EXPECT_EQ("13ms", fmt::format("{:.0}", dms(12.56)));
-  EXPECT_EQ("12.6ms", fmt::format("{:.1}", dms(12.56)));
-  EXPECT_EQ("12.56ms", fmt::format("{:.2}", dms(12.56)));
-}
-
-TEST(chrono_test, format_full_specs) {
-  EXPECT_EQ("1ms   ", fmt::format("{:6.0}", dms(1.234)));
-  EXPECT_EQ("1.2ms ", fmt::format("{:6.1}", dms(1.234)));
-  EXPECT_EQ("  1.23ms", fmt::format("{:>8.{}}", dms(1.234), 2));
-  EXPECT_EQ(" 1.2ms ", fmt::format("{:^{}.{}}", dms(1.234), 7, 1));
-  EXPECT_EQ(" 1.23ms ", fmt::format("{0:^{2}.{1}}", dms(1.234), 2, 8));
-  EXPECT_EQ("=1.234ms=", fmt::format("{:=^{}.{}}", dms(1.234), 9, 3));
-  EXPECT_EQ("*1.2340ms*", fmt::format("{:*^10.4}", dms(1.234)));
-
-  EXPECT_EQ("13ms  ", fmt::format("{:6.0}", dms(12.56)));
-  EXPECT_EQ("    13ms", fmt::format("{:>8.{}}", dms(12.56), 0));
-  EXPECT_EQ(" 13ms ", fmt::format("{:^{}.{}}", dms(12.56), 6, 0));
-  EXPECT_EQ("  13ms  ", fmt::format("{0:^{2}.{1}}", dms(12.56), 0, 8));
-  EXPECT_EQ("==13ms===", fmt::format("{:=^{}.{}}", dms(12.56), 9, 0));
-  EXPECT_EQ("***13ms***", fmt::format("{:*^10.0}", dms(12.56)));
-}
-
-TEST(chrono_test, format_simple_q) {
-  typedef std::chrono::duration<float> fs;
-  EXPECT_EQ("1.234 s", fmt::format("{:%Q %q}", fs(1.234)));
-  typedef std::chrono::duration<float, std::milli> fms;
-  EXPECT_EQ("1.234 ms", fmt::format("{:%Q %q}", fms(1.234)));
-  typedef std::chrono::duration<double> ds;
-  EXPECT_EQ("1.234 s", fmt::format("{:%Q %q}", ds(1.234)));
-  EXPECT_EQ("1.234 ms", fmt::format("{:%Q %q}", dms(1.234)));
-}
-
-TEST(chrono_test, format_precision_q) {
-  EXPECT_THROW_MSG(
-      (void)fmt::format(runtime("{:.2%Q %q}"), std::chrono::seconds(42)),
-      fmt::format_error, "precision not allowed for this argument type");
-  EXPECT_EQ("1.2 ms", fmt::format("{:.1%Q %q}", dms(1.234)));
-  EXPECT_EQ("1.23 ms", fmt::format("{:.{}%Q %q}", dms(1.234), 2));
-}
-
-TEST(chrono_test, format_full_specs_q) {
-  EXPECT_EQ("1 ms   ", fmt::format("{:7.0%Q %q}", dms(1.234)));
-  EXPECT_EQ("1.2 ms ", fmt::format("{:7.1%Q %q}", dms(1.234)));
-  EXPECT_EQ(" 1.23 ms", fmt::format("{:>8.{}%Q %q}", dms(1.234), 2));
-  EXPECT_EQ(" 1.2 ms ", fmt::format("{:^{}.{}%Q %q}", dms(1.234), 8, 1));
-  EXPECT_EQ(" 1.23 ms ", fmt::format("{0:^{2}.{1}%Q %q}", dms(1.234), 2, 9));
-  EXPECT_EQ("=1.234 ms=", fmt::format("{:=^{}.{}%Q %q}", dms(1.234), 10, 3));
-  EXPECT_EQ("*1.2340 ms*", fmt::format("{:*^11.4%Q %q}", dms(1.234)));
-
-  EXPECT_EQ("13 ms  ", fmt::format("{:7.0%Q %q}", dms(12.56)));
-  EXPECT_EQ("   13 ms", fmt::format("{:>8.{}%Q %q}", dms(12.56), 0));
-  EXPECT_EQ(" 13 ms  ", fmt::format("{:^{}.{}%Q %q}", dms(12.56), 8, 0));
-  EXPECT_EQ("  13 ms  ", fmt::format("{0:^{2}.{1}%Q %q}", dms(12.56), 0, 9));
-  EXPECT_EQ("==13 ms==", fmt::format("{:=^{}.{}%Q %q}", dms(12.56), 9, 0));
-  EXPECT_EQ("***13 ms***", fmt::format("{:*^11.0%Q %q}", dms(12.56)));
-}
-
-TEST(chrono_test, invalid_width_id) {
-  EXPECT_THROW((void)fmt::format(runtime("{:{o}"), std::chrono::seconds(0)),
-               fmt::format_error);
-}
-
-TEST(chrono_test, invalid_colons) {
-  EXPECT_THROW((void)fmt::format(runtime("{0}=:{0::"), std::chrono::seconds(0)),
-               fmt::format_error);
-}
-
-TEST(chrono_test, negative_durations) {
-  EXPECT_EQ("-12345", fmt::format("{:%Q}", std::chrono::seconds(-12345)));
-  EXPECT_EQ("-03:25:45",
-            fmt::format("{:%H:%M:%S}", std::chrono::seconds(-12345)));
-  EXPECT_EQ("-00:01",
-            fmt::format("{:%M:%S}", std::chrono::duration<double>(-1)));
-  EXPECT_EQ("s", fmt::format("{:%q}", std::chrono::seconds(-12345)));
-  EXPECT_EQ("-00.127",
-            fmt::format("{:%S}",
-                        std::chrono::duration<signed char, std::milli>{-127}));
-  auto min = std::numeric_limits<int>::min();
-  EXPECT_EQ(fmt::format("{}", min),
-            fmt::format("{:%Q}", std::chrono::duration<int>(min)));
-}
-
-TEST(chrono_test, special_durations) {
-  auto value = fmt::format("{:%S}", std::chrono::duration<double>(1e20));
-  EXPECT_EQ(value, "40");
-  auto nan = std::numeric_limits<double>::quiet_NaN();
-  EXPECT_EQ(
-      "nan nan nan nan nan:nan nan",
-      fmt::format("{:%I %H %M %S %R %r}", std::chrono::duration<double>(nan)));
-  EXPECT_EQ(fmt::format("{}", std::chrono::duration<float, std::exa>(1)),
-            "1Es");
-  EXPECT_EQ(fmt::format("{}", std::chrono::duration<float, std::atto>(1)),
-            "1as");
-  EXPECT_EQ(fmt::format("{:%R}", std::chrono::duration<char, std::mega>{2}),
-            "03:33");
-  EXPECT_EQ(fmt::format("{:%T}", std::chrono::duration<char, std::mega>{2}),
-            "03:33:20");
-}
-
-TEST(chrono_test, unsigned_duration) {
-  EXPECT_EQ("42s", fmt::format("{}", std::chrono::duration<unsigned>(42)));
-}
-
-TEST(chrono_test, weekday) {
-  auto loc = get_locale("ru_RU.UTF-8");
-  std::locale::global(loc);
-  auto mon = fmt::weekday(1);
-
-  auto tm = std::tm();
-  tm.tm_wday = static_cast<int>(mon.c_encoding());
-
-  EXPECT_EQ(fmt::format("{}", mon), "Mon");
-  EXPECT_EQ(fmt::format("{:%a}", tm), "Mon");
-
-  if (loc != std::locale::classic()) {
-    EXPECT_THAT((std::vector<std::string>{"пн", "Пн", "пнд", "Пнд"}),
-                Contains(fmt::format(loc, "{:L}", mon)));
-    EXPECT_THAT((std::vector<std::string>{"пн", "Пн", "пнд", "Пнд"}),
-                Contains(fmt::format(loc, "{:%a}", tm)));
-  }
-}
-
-TEST(chrono_test, cpp20_duration_subsecond_support) {
-  using attoseconds = std::chrono::duration<long long, std::atto>;
-  // Check that 18 digits of subsecond precision are supported.
-  EXPECT_EQ(fmt::format("{:%S}", attoseconds{999999999999999999}),
-            "00.999999999999999999");
-  EXPECT_EQ(fmt::format("{:%S}", attoseconds{673231113420148734}),
-            "00.673231113420148734");
-  EXPECT_EQ(fmt::format("{:%S}", attoseconds{-673231113420148734}),
-            "-00.673231113420148734");
-  EXPECT_EQ(fmt::format("{:%S}", std::chrono::nanoseconds{13420148734}),
-            "13.420148734");
-  EXPECT_EQ(fmt::format("{:%S}", std::chrono::nanoseconds{-13420148734}),
-            "-13.420148734");
-  EXPECT_EQ(fmt::format("{:%S}", std::chrono::milliseconds{1234}), "01.234");
-  {
-    // Check that {:%H:%M:%S} is equivalent to {:%T}.
-    auto dur = std::chrono::milliseconds{3601234};
-    auto formatted_dur = fmt::format("{:%T}", dur);
-    EXPECT_EQ(formatted_dur, "01:00:01.234");
-    EXPECT_EQ(fmt::format("{:%H:%M:%S}", dur), formatted_dur);
-  }
-  using nanoseconds_dbl = std::chrono::duration<double, std::nano>;
-  EXPECT_EQ(fmt::format("{:%S}", nanoseconds_dbl{-123456789}), "-00.123456789");
-  EXPECT_EQ(fmt::format("{:%S}", nanoseconds_dbl{9123456789}), "09.123456789");
-  // Verify that only the seconds part is extracted and printed.
-  EXPECT_EQ(fmt::format("{:%S}", nanoseconds_dbl{99123456789}), "39.123456789");
-  EXPECT_EQ(fmt::format("{:%S}", nanoseconds_dbl{99123000000}), "39.123000000");
-  {
-    // Now the hour is printed, and we also test if negative doubles work.
-    auto dur = nanoseconds_dbl{-99123456789};
-    auto formatted_dur = fmt::format("{:%T}", dur);
-    EXPECT_EQ(formatted_dur, "-00:01:39.123456789");
-    EXPECT_EQ(fmt::format("{:%H:%M:%S}", dur), formatted_dur);
-  }
-  // Check that durations with precision greater than std::chrono::seconds have
-  // fixed precision, and print zeros even if there is no fractional part.
-  EXPECT_EQ(fmt::format("{:%S}", std::chrono::microseconds{7000000}),
-            "07.000000");
-}
-
-#endif  // FMT_STATIC_THOUSANDS_SEPARATOR
diff --git a/3rdparty/fmt/test/color-test.cc b/3rdparty/fmt/test/color-test.cc
deleted file mode 100644
index af8f1494..00000000
--- a/3rdparty/fmt/test/color-test.cc
+++ /dev/null
@@ -1,66 +0,0 @@
-// Formatting library for C++ - color tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "fmt/color.h"
-
-#include <iterator>  // std::back_inserter
-
-#include "gtest-extra.h"  // EXPECT_WRITE
-
-TEST(color_test, format) {
-  EXPECT_EQ(fmt::format(fg(fmt::rgb(255, 20, 30)), "rgb(255,20,30)"),
-            "\x1b[38;2;255;020;030mrgb(255,20,30)\x1b[0m");
-  EXPECT_EQ(fmt::format(fg(fmt::color::blue), "blue"),
-            "\x1b[38;2;000;000;255mblue\x1b[0m");
-  EXPECT_EQ(
-      fmt::format(fg(fmt::color::blue) | bg(fmt::color::red), "two color"),
-      "\x1b[38;2;000;000;255m\x1b[48;2;255;000;000mtwo color\x1b[0m");
-  EXPECT_EQ(fmt::format(fmt::emphasis::bold, "bold"), "\x1b[1mbold\x1b[0m");
-  EXPECT_EQ(fmt::format(fmt::emphasis::faint, "faint"), "\x1b[2mfaint\x1b[0m");
-  EXPECT_EQ(fmt::format(fmt::emphasis::italic, "italic"),
-            "\x1b[3mitalic\x1b[0m");
-  EXPECT_EQ(fmt::format(fmt::emphasis::underline, "underline"),
-            "\x1b[4munderline\x1b[0m");
-  EXPECT_EQ(fmt::format(fmt::emphasis::blink, "blink"), "\x1b[5mblink\x1b[0m");
-  EXPECT_EQ(fmt::format(fmt::emphasis::reverse, "reverse"),
-            "\x1b[7mreverse\x1b[0m");
-  EXPECT_EQ(fmt::format(fmt::emphasis::conceal, "conceal"),
-            "\x1b[8mconceal\x1b[0m");
-  EXPECT_EQ(fmt::format(fmt::emphasis::strikethrough, "strikethrough"),
-            "\x1b[9mstrikethrough\x1b[0m");
-  EXPECT_EQ(
-      fmt::format(fg(fmt::color::blue) | fmt::emphasis::bold, "blue/bold"),
-      "\x1b[1m\x1b[38;2;000;000;255mblue/bold\x1b[0m");
-  EXPECT_EQ(fmt::format(fmt::emphasis::bold, "bold error"),
-            "\x1b[1mbold error\x1b[0m");
-  EXPECT_EQ(fmt::format(fg(fmt::color::blue), "blue log"),
-            "\x1b[38;2;000;000;255mblue log\x1b[0m");
-  EXPECT_EQ(fmt::format(fmt::text_style(), "hi"), "hi");
-  EXPECT_EQ(fmt::format(fg(fmt::terminal_color::red), "tred"),
-            "\x1b[31mtred\x1b[0m");
-  EXPECT_EQ(fmt::format(bg(fmt::terminal_color::cyan), "tcyan"),
-            "\x1b[46mtcyan\x1b[0m");
-  EXPECT_EQ(fmt::format(fg(fmt::terminal_color::bright_green), "tbgreen"),
-            "\x1b[92mtbgreen\x1b[0m");
-  EXPECT_EQ(fmt::format(bg(fmt::terminal_color::bright_magenta), "tbmagenta"),
-            "\x1b[105mtbmagenta\x1b[0m");
-  EXPECT_EQ(fmt::format(fg(fmt::terminal_color::red), "{}", "foo"),
-            "\x1b[31mfoo\x1b[0m");
-}
-
-TEST(color_test, format_to) {
-  auto out = std::string();
-  fmt::format_to(std::back_inserter(out), fg(fmt::rgb(255, 20, 30)),
-                 "rgb(255,20,30){}{}{}", 1, 2, 3);
-  EXPECT_EQ(fmt::to_string(out),
-            "\x1b[38;2;255;020;030mrgb(255,20,30)123\x1b[0m");
-}
-
-TEST(color_test, print) {
-  EXPECT_WRITE(stdout, fmt::print(fg(fmt::rgb(255, 20, 30)), "rgb(255,20,30)"),
-               "\x1b[38;2;255;020;030mrgb(255,20,30)\x1b[0m");
-}
diff --git a/3rdparty/fmt/test/compile-error-test/CMakeLists.txt b/3rdparty/fmt/test/compile-error-test/CMakeLists.txt
deleted file mode 100644
index db7a9429..00000000
--- a/3rdparty/fmt/test/compile-error-test/CMakeLists.txt
+++ /dev/null
@@ -1,203 +0,0 @@
-# Test if compile errors are produced where necessary.
-
-cmake_minimum_required(VERSION 3.1...3.18)
-project(compile-error-test CXX)
-
-set(fmt_headers "
-  #include <fmt/format.h>
-  #include <fmt/xchar.h>
-")
-
-set(error_test_names "")
-set(non_error_test_content "")
-
-# For error tests (we expect them to produce compilation error):
-#  * adds a name of test into `error_test_names` list
-#  * generates a single source file (with the same name) for each test
-# For non-error tests (we expect them to compile successfully):
-#  * adds a code segment as separate function to `non_error_test_content`
-function (expect_compile name code_fragment)
-  cmake_parse_arguments(EXPECT_COMPILE "ERROR" "" "" ${ARGN})
-  string(MAKE_C_IDENTIFIER "${name}" test_name)
-
-  if (EXPECT_COMPILE_ERROR)
-    file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/${test_name}.cc" "
-      ${fmt_headers}
-      void ${test_name}() {
-        ${code_fragment}
-      }
-    ")
-    set(error_test_names_copy "${error_test_names}")
-    list(APPEND error_test_names_copy "${test_name}")
-    set(error_test_names "${error_test_names_copy}" PARENT_SCOPE)
-  else()
-    set(non_error_test_content "
-      ${non_error_test_content}
-      void ${test_name}() {
-        ${code_fragment}
-      }" PARENT_SCOPE)
-  endif()
-endfunction ()
-
-# Generates a source file for non-error test with `non_error_test_content` and
-# CMake project file with all error and single non-error test targets.
-function (run_tests)
-  set(cmake_targets "")
-  foreach(test_name IN LISTS error_test_names)
-    set(cmake_targets "
-      ${cmake_targets}
-      add_library(test-${test_name} ${test_name}.cc)
-      target_link_libraries(test-${test_name} PRIVATE fmt::fmt)
-    ")
-  endforeach()
-
-  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/non_error_test.cc" "
-    ${fmt_headers}
-    ${non_error_test_content}
-  ")
-  set(cmake_targets "
-    ${cmake_targets}
-    add_library(non-error-test non_error_test.cc)
-    target_link_libraries(non-error-test PRIVATE fmt::fmt)
-  ")
-
-  file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test/CMakeLists.txt" "
-    cmake_minimum_required(VERSION 3.1...3.18)
-    project(tests CXX)
-    add_subdirectory(${FMT_DIR} fmt)
-    ${cmake_targets}
-  ")
-
-  set(build_directory "${CMAKE_CURRENT_BINARY_DIR}/test/build")
-  file(MAKE_DIRECTORY "${build_directory}")
-  execute_process(
-    COMMAND
-      "${CMAKE_COMMAND}"
-      "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
-      "-DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}"
-      "-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}"
-      "-DCMAKE_GENERATOR=${CMAKE_GENERATOR}"
-      "-DCMAKE_MAKE_PROGRAM=${CMAKE_MAKE_PROGRAM}"
-      "-DFMT_DIR=${FMT_DIR}"
-      "${CMAKE_CURRENT_BINARY_DIR}/test"
-    WORKING_DIRECTORY "${build_directory}"
-    RESULT_VARIABLE result_var
-    OUTPUT_VARIABLE output_var
-    ERROR_VARIABLE output_var)
-  if (NOT result_var EQUAL 0)
-    message(FATAL_ERROR "Unable to configure:\n${output_var}")
-  endif()
-
-  foreach(test_name IN LISTS error_test_names)
-    execute_process(
-      COMMAND
-        "${CMAKE_COMMAND}" --build "${build_directory}" --target "test-${test_name}"
-      WORKING_DIRECTORY "${build_directory}"
-      RESULT_VARIABLE result_var
-      OUTPUT_VARIABLE output_var
-      ERROR_QUIET)
-    if (result_var EQUAL 0)
-      message(SEND_ERROR "No compile error for \"${test_name}\":\n${output_var}")
-    endif ()
-  endforeach()
-
-  execute_process(
-    COMMAND
-      "${CMAKE_COMMAND}" --build "${build_directory}" --target "non-error-test"
-    WORKING_DIRECTORY "${build_directory}"
-    RESULT_VARIABLE result_var
-    OUTPUT_VARIABLE output_var
-    ERROR_VARIABLE output_var)
-  if (NOT result_var EQUAL 0)
-    message(SEND_ERROR "Compile error for combined non-error test:\n${output_var}")
-  endif ()
-endfunction ()
-
-
-# check if the source file skeleton compiles
-expect_compile(check "")
-expect_compile(check-error "compilation_error" ERROR)
-
-# Formatting a wide character with a narrow format string is forbidden.
-expect_compile(wide-character-narrow-format-string "fmt::format(L\"{}\", L'a');")
-expect_compile(wide-character-narrow-format-string-error "fmt::format(\"{}\", L'a');" ERROR)
-
-# Formatting a wide string with a narrow format string is forbidden.
-expect_compile(wide-string-narrow-format-string "fmt::format(L\"{}\", L\"foo\");")
-expect_compile(wide-string-narrow-format-string-error "fmt::format(\"{}\", L\"foo\");" ERROR)
-
-# Formatting a narrow string with a wide format string is forbidden because
-# mixing UTF-8 with UTF-16/32 can result in an invalid output.
-expect_compile(narrow-string-wide-format-string "fmt::format(L\"{}\", L\"foo\");")
-expect_compile(narrow-string-wide-format-string-error "fmt::format(L\"{}\", \"foo\");" ERROR)
-
-expect_compile(cast-to-string "
-  struct S {
-    operator std::string() const { return std::string(); }
-  };
-  fmt::format(\"{}\", std::string(S()));
-")
-expect_compile(cast-to-string-error "
-  struct S {
-    operator std::string() const { return std::string(); }
-  };
-  fmt::format(\"{}\", S());
-" ERROR)
-
-# Formatting a function
-expect_compile(format-function "
-  void (*f)();
-  fmt::format(\"{}\", fmt::ptr(f));
-")
-expect_compile(format-function-error "
-  void (*f)();
-  fmt::format(\"{}\", f);
-" ERROR)
-
-# Make sure that compiler features detected in the header
-# match the features detected in CMake.
-if (SUPPORTS_USER_DEFINED_LITERALS)
-  set(supports_udl 1)
-else ()
-  set(supports_udl 0)
-endif ()
-expect_compile(udl-check "
-  #if FMT_USE_USER_DEFINED_LITERALS != ${supports_udl}
-  # error
-  #endif
-")
-
-if (CMAKE_CXX_STANDARD GREATER_EQUAL 20)
-  # Compile-time argument type check
-  expect_compile(format-string-number-spec "
-    #ifdef FMT_HAS_CONSTEVAL
-      fmt::format(\"{:d}\", 42);
-    #endif
-  ")
-  expect_compile(format-string-number-spec-error "
-    #ifdef FMT_HAS_CONSTEVAL
-      fmt::format(\"{:d}\", \"I am not a number\");
-    #else
-      #error
-    #endif
-  " ERROR)
-
-  # Compile-time argument name check
-  expect_compile(format-string-name "
-    #if defined(FMT_HAS_CONSTEVAL) && FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-      using namespace fmt::literals;
-      fmt::print(\"{foo}\", \"foo\"_a=42);
-    #endif
-  ")
-  expect_compile(format-string-name-error "
-    #if defined(FMT_HAS_CONSTEVAL) && FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-      using namespace fmt::literals;
-      fmt::print(\"{foo}\", \"bar\"_a=42);
-    #else
-      #error
-    #endif
-  " ERROR)
-endif ()
-
-# Run all tests
-run_tests()
diff --git a/3rdparty/fmt/test/compile-fp-test.cc b/3rdparty/fmt/test/compile-fp-test.cc
deleted file mode 100644
index afedc26d..00000000
--- a/3rdparty/fmt/test/compile-fp-test.cc
+++ /dev/null
@@ -1,62 +0,0 @@
-// Formatting library for C++ - formatting library tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "fmt/compile.h"
-#include "gmock/gmock.h"
-
-#if defined(__cpp_lib_bit_cast) && __cpp_lib_bit_cast >= 201806 && \
-    defined(__cpp_constexpr) && __cpp_constexpr >= 201907 &&       \
-    defined(__cpp_constexpr_dynamic_alloc) &&                      \
-    __cpp_constexpr_dynamic_alloc >= 201907 && __cplusplus >= 202002L
-template <size_t max_string_length, typename Char = char> struct test_string {
-  template <typename T> constexpr bool operator==(const T& rhs) const noexcept {
-    return fmt::basic_string_view<Char>(rhs).compare(buffer) == 0;
-  }
-  Char buffer[max_string_length]{};
-};
-
-template <size_t max_string_length, typename Char = char, typename... Args>
-consteval auto test_format(auto format, const Args&... args) {
-  test_string<max_string_length, Char> string{};
-  fmt::format_to(string.buffer, format, args...);
-  return string;
-}
-
-TEST(compile_time_formatting_test, floating_point) {
-  EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{}"), 0.0f));
-  EXPECT_EQ("392.500000", test_format<11>(FMT_COMPILE("{0:f}"), 392.5f));
-
-  EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{:}"), 0.0));
-  EXPECT_EQ("0.000000", test_format<9>(FMT_COMPILE("{:f}"), 0.0));
-  EXPECT_EQ("0", test_format<2>(FMT_COMPILE("{:g}"), 0.0));
-  EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:}"), 392.65));
-  EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:g}"), 392.65));
-  EXPECT_EQ("392.65", test_format<7>(FMT_COMPILE("{:G}"), 392.65));
-  EXPECT_EQ("4.9014e+06", test_format<11>(FMT_COMPILE("{:g}"), 4.9014e6));
-  EXPECT_EQ("-392.650000", test_format<12>(FMT_COMPILE("{:f}"), -392.65));
-  EXPECT_EQ("-392.650000", test_format<12>(FMT_COMPILE("{:F}"), -392.65));
-
-  EXPECT_EQ("3.926500e+02", test_format<13>(FMT_COMPILE("{0:e}"), 392.65));
-  EXPECT_EQ("3.926500E+02", test_format<13>(FMT_COMPILE("{0:E}"), 392.65));
-  EXPECT_EQ("+0000392.6", test_format<11>(FMT_COMPILE("{0:+010.4g}"), 392.65));
-  EXPECT_EQ("9223372036854775808.000000",
-            test_format<27>(FMT_COMPILE("{:f}"), 9223372036854775807.0));
-
-  constexpr double nan = std::numeric_limits<double>::quiet_NaN();
-  EXPECT_EQ("nan", test_format<4>(FMT_COMPILE("{}"), nan));
-  EXPECT_EQ("+nan", test_format<5>(FMT_COMPILE("{:+}"), nan));
-  if (std::signbit(-nan))
-    EXPECT_EQ("-nan", test_format<5>(FMT_COMPILE("{}"), -nan));
-  else
-    fmt::print("Warning: compiler doesn't handle negative NaN correctly");
-
-  constexpr double inf = std::numeric_limits<double>::infinity();
-  EXPECT_EQ("inf", test_format<4>(FMT_COMPILE("{}"), inf));
-  EXPECT_EQ("+inf", test_format<5>(FMT_COMPILE("{:+}"), inf));
-  EXPECT_EQ("-inf", test_format<5>(FMT_COMPILE("{}"), -inf));
-}
-#endif
diff --git a/3rdparty/fmt/test/compile-test.cc b/3rdparty/fmt/test/compile-test.cc
deleted file mode 100644
index 1765961b..00000000
--- a/3rdparty/fmt/test/compile-test.cc
+++ /dev/null
@@ -1,376 +0,0 @@
-// Formatting library for C++ - formatting library tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "fmt/compile.h"
-
-#include <type_traits>
-
-#include "fmt/chrono.h"
-#include "gmock/gmock.h"
-#include "gtest-extra.h"
-
-TEST(iterator_test, counting_iterator) {
-  auto it = fmt::detail::counting_iterator();
-  auto prev = it++;
-  EXPECT_EQ(prev.count(), 0);
-  EXPECT_EQ(it.count(), 1);
-  EXPECT_EQ((it + 41).count(), 42);
-}
-
-TEST(iterator_test, truncating_iterator) {
-  char* p = nullptr;
-  auto it = fmt::detail::truncating_iterator<char*>(p, 3);
-  auto prev = it++;
-  EXPECT_EQ(prev.base(), p);
-  EXPECT_EQ(it.base(), p + 1);
-}
-
-TEST(iterator_test, truncating_iterator_default_construct) {
-  auto it = fmt::detail::truncating_iterator<char*>();
-  EXPECT_EQ(nullptr, it.base());
-  EXPECT_EQ(std::size_t{0}, it.count());
-}
-
-#ifdef __cpp_lib_ranges
-TEST(iterator_test, truncating_iterator_is_output_iterator) {
-  static_assert(
-      std::output_iterator<fmt::detail::truncating_iterator<char*>, char>);
-}
-#endif
-
-TEST(iterator_test, truncating_back_inserter) {
-  auto buffer = std::string();
-  auto bi = std::back_inserter(buffer);
-  auto it = fmt::detail::truncating_iterator<decltype(bi)>(bi, 2);
-  *it++ = '4';
-  *it++ = '2';
-  *it++ = '1';
-  EXPECT_EQ(buffer.size(), 2);
-  EXPECT_EQ(buffer, "42");
-}
-
-TEST(compile_test, compile_fallback) {
-  // FMT_COMPILE should fallback on runtime formatting when `if constexpr` is
-  // not available.
-  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42));
-}
-
-struct type_with_get {
-  template <int> friend void get(type_with_get);
-};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<type_with_get> : formatter<int> {
-  template <typename FormatContext>
-  auto format(type_with_get, FormatContext& ctx) -> decltype(ctx.out()) {
-    return formatter<int>::format(42, ctx);
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(compile_test, compile_type_with_get) {
-  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), type_with_get()));
-}
-
-#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
-struct test_formattable {};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<test_formattable> : formatter<const char*> {
-  char word_spec = 'f';
-  constexpr auto parse(format_parse_context& ctx) {
-    auto it = ctx.begin(), end = ctx.end();
-    if (it == end || *it == '}') return it;
-    if (it != end && (*it == 'f' || *it == 'b')) word_spec = *it++;
-    if (it != end && *it != '}') throw format_error("invalid format");
-    return it;
-  }
-  template <typename FormatContext>
-  constexpr auto format(test_formattable, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    return formatter<const char*>::format(word_spec == 'f' ? "foo" : "bar",
-                                          ctx);
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(compile_test, format_default) {
-  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42));
-  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42u));
-  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42ll));
-  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42ull));
-  EXPECT_EQ("true", fmt::format(FMT_COMPILE("{}"), true));
-  EXPECT_EQ("x", fmt::format(FMT_COMPILE("{}"), 'x'));
-  EXPECT_EQ("4.2", fmt::format(FMT_COMPILE("{}"), 4.2));
-  EXPECT_EQ("foo", fmt::format(FMT_COMPILE("{}"), "foo"));
-  EXPECT_EQ("foo", fmt::format(FMT_COMPILE("{}"), std::string("foo")));
-  EXPECT_EQ("foo", fmt::format(FMT_COMPILE("{}"), test_formattable()));
-  auto t = std::chrono::system_clock::now();
-  EXPECT_EQ(fmt::format("{}", t), fmt::format(FMT_COMPILE("{}"), t));
-#  ifdef __cpp_lib_byte
-  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), std::byte{42}));
-#  endif
-}
-
-TEST(compile_test, format_wide_string) {
-  EXPECT_EQ(L"42", fmt::format(FMT_COMPILE(L"{}"), 42));
-}
-
-TEST(compile_test, format_specs) {
-  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{:x}"), 0x42));
-  EXPECT_EQ("1.2 ms ",
-            fmt::format(FMT_COMPILE("{:7.1%Q %q}"),
-                        std::chrono::duration<double, std::milli>(1.234)));
-}
-
-TEST(compile_test, dynamic_format_specs) {
-  EXPECT_EQ("foo  ", fmt::format(FMT_COMPILE("{:{}}"), "foo", 5));
-  EXPECT_EQ("  3.14", fmt::format(FMT_COMPILE("{:{}.{}f}"), 3.141592, 6, 2));
-  EXPECT_EQ(
-      "=1.234ms=",
-      fmt::format(FMT_COMPILE("{:=^{}.{}}"),
-                  std::chrono::duration<double, std::milli>(1.234), 9, 3));
-}
-
-TEST(compile_test, manual_ordering) {
-  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{0}"), 42));
-  EXPECT_EQ(" -42", fmt::format(FMT_COMPILE("{0:4}"), -42));
-  EXPECT_EQ("41 43", fmt::format(FMT_COMPILE("{0} {1}"), 41, 43));
-  EXPECT_EQ("41 43", fmt::format(FMT_COMPILE("{1} {0}"), 43, 41));
-  EXPECT_EQ("41 43", fmt::format(FMT_COMPILE("{0} {2}"), 41, 42, 43));
-  EXPECT_EQ("  41   43", fmt::format(FMT_COMPILE("{1:{2}} {0:4}"), 43, 41, 4));
-  EXPECT_EQ("42 1.2 ms ",
-            fmt::format(FMT_COMPILE("{0} {1:7.1%Q %q}"), 42,
-                        std::chrono::duration<double, std::milli>(1.234)));
-  EXPECT_EQ(
-      "true 42 42 foo 0x1234 foo",
-      fmt::format(FMT_COMPILE("{0} {1} {2} {3} {4} {5}"), true, 42, 42.0f,
-                  "foo", reinterpret_cast<void*>(0x1234), test_formattable()));
-  EXPECT_EQ(L"42", fmt::format(FMT_COMPILE(L"{0}"), 42));
-}
-
-TEST(compile_test, named) {
-  auto runtime_named_field_compiled =
-      fmt::detail::compile<decltype(fmt::arg("arg", 42))>(FMT_COMPILE("{arg}"));
-  static_assert(std::is_same_v<decltype(runtime_named_field_compiled),
-                               fmt::detail::runtime_named_field<char>>);
-
-  EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), fmt::arg("arg", 42)));
-  EXPECT_EQ("41 43", fmt::format(FMT_COMPILE("{} {}"), fmt::arg("arg", 41),
-                                 fmt::arg("arg", 43)));
-
-  EXPECT_EQ("foobar",
-            fmt::format(FMT_COMPILE("{a0}{a1}"), fmt::arg("a0", "foo"),
-                        fmt::arg("a1", "bar")));
-  EXPECT_EQ("foobar", fmt::format(FMT_COMPILE("{}{a1}"), fmt::arg("a0", "foo"),
-                                  fmt::arg("a1", "bar")));
-  EXPECT_EQ("foofoo", fmt::format(FMT_COMPILE("{a0}{}"), fmt::arg("a0", "foo"),
-                                  fmt::arg("a1", "bar")));
-  EXPECT_EQ("foobar", fmt::format(FMT_COMPILE("{0}{a1}"), fmt::arg("a0", "foo"),
-                                  fmt::arg("a1", "bar")));
-  EXPECT_EQ("foobar", fmt::format(FMT_COMPILE("{a0}{1}"), fmt::arg("a0", "foo"),
-                                  fmt::arg("a1", "bar")));
-
-  EXPECT_EQ("foobar",
-            fmt::format(FMT_COMPILE("{}{a1}"), "foo", fmt::arg("a1", "bar")));
-  EXPECT_EQ("foobar",
-            fmt::format(FMT_COMPILE("{a0}{a1}"), fmt::arg("a1", "bar"),
-                        fmt::arg("a2", "baz"), fmt::arg("a0", "foo")));
-  EXPECT_EQ(" bar foo ",
-            fmt::format(FMT_COMPILE(" {foo} {bar} "), fmt::arg("foo", "bar"),
-                        fmt::arg("bar", "foo")));
-
-  EXPECT_THROW(fmt::format(FMT_COMPILE("{invalid}"), fmt::arg("valid", 42)),
-               fmt::format_error);
-
-#  if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-  using namespace fmt::literals;
-  auto statically_named_field_compiled =
-      fmt::detail::compile<decltype("arg"_a = 42)>(FMT_COMPILE("{arg}"));
-  static_assert(std::is_same_v<decltype(statically_named_field_compiled),
-                               fmt::detail::field<char, int, 0>>);
-
-  EXPECT_EQ("41 43",
-            fmt::format(FMT_COMPILE("{a0} {a1}"), "a0"_a = 41, "a1"_a = 43));
-  EXPECT_EQ("41 43",
-            fmt::format(FMT_COMPILE("{a1} {a0}"), "a0"_a = 43, "a1"_a = 41));
-#  endif
-}
-
-TEST(compile_test, format_to) {
-  char buf[8];
-  auto end = fmt::format_to(buf, FMT_COMPILE("{}"), 42);
-  *end = '\0';
-  EXPECT_STREQ("42", buf);
-  end = fmt::format_to(buf, FMT_COMPILE("{:x}"), 42);
-  *end = '\0';
-  EXPECT_STREQ("2a", buf);
-}
-
-TEST(compile_test, format_to_n) {
-  constexpr auto buffer_size = 8;
-  char buffer[buffer_size];
-  auto res = fmt::format_to_n(buffer, buffer_size, FMT_COMPILE("{}"), 42);
-  *res.out = '\0';
-  EXPECT_STREQ("42", buffer);
-  res = fmt::format_to_n(buffer, buffer_size, FMT_COMPILE("{:x}"), 42);
-  *res.out = '\0';
-  EXPECT_STREQ("2a", buffer);
-}
-
-TEST(compile_test, formatted_size) {
-  EXPECT_EQ(2, fmt::formatted_size(FMT_COMPILE("{0}"), 42));
-  EXPECT_EQ(5, fmt::formatted_size(FMT_COMPILE("{0:<4.2f}"), 42.0));
-}
-
-TEST(compile_test, text_and_arg) {
-  EXPECT_EQ(">>>42<<<", fmt::format(FMT_COMPILE(">>>{}<<<"), 42));
-  EXPECT_EQ("42!", fmt::format(FMT_COMPILE("{}!"), 42));
-}
-
-TEST(compile_test, unknown_format_fallback) {
-  EXPECT_EQ(" 42 ",
-            fmt::format(FMT_COMPILE("{name:^4}"), fmt::arg("name", 42)));
-
-  std::vector<char> v;
-  fmt::format_to(std::back_inserter(v), FMT_COMPILE("{name:^4}"),
-                 fmt::arg("name", 42));
-  EXPECT_EQ(" 42 ", fmt::string_view(v.data(), v.size()));
-
-  char buffer[4];
-  auto result = fmt::format_to_n(buffer, 4, FMT_COMPILE("{name:^5}"),
-                                 fmt::arg("name", 42));
-  EXPECT_EQ(5u, result.size);
-  EXPECT_EQ(buffer + 4, result.out);
-  EXPECT_EQ(" 42 ", fmt::string_view(buffer, 4));
-}
-
-TEST(compile_test, empty) { EXPECT_EQ("", fmt::format(FMT_COMPILE(""))); }
-
-struct to_stringable {
-  friend fmt::string_view to_string_view(to_stringable) { return {}; }
-};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<to_stringable> {
-  auto parse(format_parse_context& ctx) const -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  template <typename FormatContext>
-  auto format(const to_stringable&, FormatContext& ctx) -> decltype(ctx.out()) {
-    return ctx.out();
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(compile_test, to_string_and_formatter) {
-  fmt::format(FMT_COMPILE("{}"), to_stringable());
-}
-
-TEST(compile_test, print) {
-  EXPECT_WRITE(stdout, fmt::print(FMT_COMPILE("Don't {}!"), "panic"),
-               "Don't panic!");
-  EXPECT_WRITE(stderr, fmt::print(stderr, FMT_COMPILE("Don't {}!"), "panic"),
-               "Don't panic!");
-}
-#endif
-
-#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-TEST(compile_test, compile_format_string_literal) {
-  using namespace fmt::literals;
-  EXPECT_EQ("", fmt::format(""_cf));
-  EXPECT_EQ("42", fmt::format("{}"_cf, 42));
-  EXPECT_EQ(L"42", fmt::format(L"{}"_cf, 42));
-}
-#endif
-
-#if __cplusplus >= 202002L || \
-    (__cplusplus >= 201709L && FMT_GCC_VERSION >= 1002)
-template <size_t max_string_length, typename Char = char> struct test_string {
-  template <typename T> constexpr bool operator==(const T& rhs) const noexcept {
-    return fmt::basic_string_view<Char>(rhs).compare(buffer) == 0;
-  }
-  Char buffer[max_string_length]{};
-};
-
-template <size_t max_string_length, typename Char = char, typename... Args>
-consteval auto test_format(auto format, const Args&... args) {
-  test_string<max_string_length, Char> string{};
-  fmt::format_to(string.buffer, format, args...);
-  return string;
-}
-
-TEST(compile_time_formatting_test, bool) {
-  EXPECT_EQ("true", test_format<5>(FMT_COMPILE("{}"), true));
-  EXPECT_EQ("false", test_format<6>(FMT_COMPILE("{}"), false));
-  EXPECT_EQ("true ", test_format<6>(FMT_COMPILE("{:5}"), true));
-  EXPECT_EQ("1", test_format<2>(FMT_COMPILE("{:d}"), true));
-}
-
-TEST(compile_time_formatting_test, integer) {
-  EXPECT_EQ("42", test_format<3>(FMT_COMPILE("{}"), 42));
-  EXPECT_EQ("420", test_format<4>(FMT_COMPILE("{}"), 420));
-  EXPECT_EQ("42 42", test_format<6>(FMT_COMPILE("{} {}"), 42, 42));
-  EXPECT_EQ("42 42",
-            test_format<6>(FMT_COMPILE("{} {}"), uint32_t{42}, uint64_t{42}));
-
-  EXPECT_EQ("+42", test_format<4>(FMT_COMPILE("{:+}"), 42));
-  EXPECT_EQ("42", test_format<3>(FMT_COMPILE("{:-}"), 42));
-  EXPECT_EQ(" 42", test_format<4>(FMT_COMPILE("{: }"), 42));
-
-  EXPECT_EQ("-0042", test_format<6>(FMT_COMPILE("{:05}"), -42));
-
-  EXPECT_EQ("101010", test_format<7>(FMT_COMPILE("{:b}"), 42));
-  EXPECT_EQ("0b101010", test_format<9>(FMT_COMPILE("{:#b}"), 42));
-  EXPECT_EQ("0B101010", test_format<9>(FMT_COMPILE("{:#B}"), 42));
-  EXPECT_EQ("042", test_format<4>(FMT_COMPILE("{:#o}"), 042));
-  EXPECT_EQ("0x4a", test_format<5>(FMT_COMPILE("{:#x}"), 0x4a));
-  EXPECT_EQ("0X4A", test_format<5>(FMT_COMPILE("{:#X}"), 0x4a));
-
-  EXPECT_EQ("   42", test_format<6>(FMT_COMPILE("{:5}"), 42));
-  EXPECT_EQ("   42", test_format<6>(FMT_COMPILE("{:5}"), 42ll));
-  EXPECT_EQ("   42", test_format<6>(FMT_COMPILE("{:5}"), 42ull));
-
-  EXPECT_EQ("42  ", test_format<5>(FMT_COMPILE("{:<4}"), 42));
-  EXPECT_EQ("  42", test_format<5>(FMT_COMPILE("{:>4}"), 42));
-  EXPECT_EQ(" 42 ", test_format<5>(FMT_COMPILE("{:^4}"), 42));
-  EXPECT_EQ("**-42", test_format<6>(FMT_COMPILE("{:*>5}"), -42));
-}
-
-TEST(compile_time_formatting_test, char) {
-  EXPECT_EQ("c", test_format<2>(FMT_COMPILE("{}"), 'c'));
-
-  EXPECT_EQ("c  ", test_format<4>(FMT_COMPILE("{:3}"), 'c'));
-  EXPECT_EQ("99", test_format<3>(FMT_COMPILE("{:d}"), 'c'));
-}
-
-TEST(compile_time_formatting_test, string) {
-  EXPECT_EQ("42", test_format<3>(FMT_COMPILE("{}"), "42"));
-  EXPECT_EQ("The answer is 42",
-            test_format<17>(FMT_COMPILE("{} is {}"), "The answer", "42"));
-
-  EXPECT_EQ("abc**", test_format<6>(FMT_COMPILE("{:*<5}"), "abc"));
-  EXPECT_EQ("**🤡**", test_format<9>(FMT_COMPILE("{:*^6}"), "🤡"));
-}
-
-TEST(compile_time_formatting_test, combination) {
-  EXPECT_EQ("420, true, answer",
-            test_format<18>(FMT_COMPILE("{}, {}, {}"), 420, true, "answer"));
-
-  EXPECT_EQ(" -42", test_format<5>(FMT_COMPILE("{:{}}"), -42, 4));
-}
-
-TEST(compile_time_formatting_test, custom_type) {
-  EXPECT_EQ("foo", test_format<4>(FMT_COMPILE("{}"), test_formattable()));
-  EXPECT_EQ("bar", test_format<4>(FMT_COMPILE("{:b}"), test_formattable()));
-}
-
-TEST(compile_time_formatting_test, multibyte_fill) {
-  EXPECT_EQ("жж42", test_format<8>(FMT_COMPILE("{:ж>4}"), 42));
-}
-#endif
diff --git a/3rdparty/fmt/test/core-test.cc b/3rdparty/fmt/test/core-test.cc
deleted file mode 100644
index b2f2097e..00000000
--- a/3rdparty/fmt/test/core-test.cc
+++ /dev/null
@@ -1,923 +0,0 @@
-// Formatting library for C++ - core tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-// clang-format off
-#include "test-assert.h"
-// clang-format on
-
-#include "fmt/core.h"
-
-#include <algorithm>    // std::copy_n
-#include <climits>      // INT_MAX
-#include <cstring>      // std::strlen
-#include <functional>   // std::equal_to
-#include <iterator>     // std::back_insert_iterator
-#include <limits>       // std::numeric_limits
-#include <string>       // std::string
-#include <type_traits>  // std::is_same
-
-#include "gmock/gmock.h"
-
-using fmt::string_view;
-using fmt::detail::buffer;
-
-using testing::_;
-using testing::Invoke;
-using testing::Return;
-
-#ifdef FMT_FORMAT_H_
-#  error core-test includes format.h
-#endif
-
-TEST(string_view_test, value_type) {
-  static_assert(std::is_same<string_view::value_type, char>::value, "");
-}
-
-TEST(string_view_test, ctor) {
-  EXPECT_STREQ("abc", fmt::string_view("abc").data());
-  EXPECT_EQ(3u, fmt::string_view("abc").size());
-
-  EXPECT_STREQ("defg", fmt::string_view(std::string("defg")).data());
-  EXPECT_EQ(4u, fmt::string_view(std::string("defg")).size());
-}
-
-TEST(string_view_test, length) {
-  // Test that string_view::size() returns string length, not buffer size.
-  char str[100] = "some string";
-  EXPECT_EQ(std::strlen(str), string_view(str).size());
-  EXPECT_LT(std::strlen(str), sizeof(str));
-}
-
-// Check string_view's comparison operator.
-template <template <typename> class Op> void check_op() {
-  const char* inputs[] = {"foo", "fop", "fo"};
-  size_t num_inputs = sizeof(inputs) / sizeof(*inputs);
-  for (size_t i = 0; i < num_inputs; ++i) {
-    for (size_t j = 0; j < num_inputs; ++j) {
-      string_view lhs(inputs[i]), rhs(inputs[j]);
-      EXPECT_EQ(Op<int>()(lhs.compare(rhs), 0), Op<string_view>()(lhs, rhs));
-    }
-  }
-}
-
-TEST(string_view_test, compare) {
-  EXPECT_EQ(string_view("foo").compare(string_view("foo")), 0);
-  EXPECT_GT(string_view("fop").compare(string_view("foo")), 0);
-  EXPECT_LT(string_view("foo").compare(string_view("fop")), 0);
-  EXPECT_GT(string_view("foo").compare(string_view("fo")), 0);
-  EXPECT_LT(string_view("fo").compare(string_view("foo")), 0);
-  check_op<std::equal_to>();
-  check_op<std::not_equal_to>();
-  check_op<std::less>();
-  check_op<std::less_equal>();
-  check_op<std::greater>();
-  check_op<std::greater_equal>();
-}
-
-namespace test_ns {
-template <typename Char> class test_string {
- private:
-  std::basic_string<Char> s_;
-
- public:
-  test_string(const Char* s) : s_(s) {}
-  const Char* data() const { return s_.data(); }
-  size_t length() const { return s_.size(); }
-  operator const Char*() const { return s_.c_str(); }
-};
-
-template <typename Char>
-fmt::basic_string_view<Char> to_string_view(const test_string<Char>& s) {
-  return {s.data(), s.length()};
-}
-}  // namespace test_ns
-
-TEST(core_test, is_output_iterator) {
-  EXPECT_TRUE((fmt::detail::is_output_iterator<char*, char>::value));
-  EXPECT_FALSE((fmt::detail::is_output_iterator<const char*, char>::value));
-  EXPECT_FALSE((fmt::detail::is_output_iterator<std::string, char>::value));
-  EXPECT_TRUE(
-      (fmt::detail::is_output_iterator<std::back_insert_iterator<std::string>,
-                                       char>::value));
-  EXPECT_TRUE(
-      (fmt::detail::is_output_iterator<std::string::iterator, char>::value));
-  EXPECT_FALSE((fmt::detail::is_output_iterator<std::string::const_iterator,
-                                                char>::value));
-}
-
-TEST(core_test, buffer_appender) {
-  // back_insert_iterator is not default-constructible before C++20, so
-  // buffer_appender can only be default-constructible when back_insert_iterator
-  // is.
-  static_assert(
-      std::is_default_constructible<
-          std::back_insert_iterator<fmt::detail::buffer<char>>>::value ==
-          std::is_default_constructible<
-              fmt::detail::buffer_appender<char>>::value,
-      "");
-
-#ifdef __cpp_lib_ranges
-  static_assert(std::output_iterator<fmt::detail::buffer_appender<char>, char>);
-#endif
-}
-
-#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 470
-TEST(buffer_test, noncopyable) {
-  EXPECT_FALSE(std::is_copy_constructible<buffer<char>>::value);
-#  if !FMT_MSC_VER
-  // std::is_copy_assignable is broken in MSVC2013.
-  EXPECT_FALSE(std::is_copy_assignable<buffer<char>>::value);
-#  endif
-}
-
-TEST(buffer_test, nonmoveable) {
-  EXPECT_FALSE(std::is_move_constructible<buffer<char>>::value);
-#  if !FMT_MSC_VER
-  // std::is_move_assignable is broken in MSVC2013.
-  EXPECT_FALSE(std::is_move_assignable<buffer<char>>::value);
-#  endif
-}
-#endif
-
-TEST(buffer_test, indestructible) {
-  static_assert(!std::is_destructible<fmt::detail::buffer<int>>(),
-                "buffer's destructor is protected");
-}
-
-template <typename T> struct mock_buffer final : buffer<T> {
-  MOCK_METHOD1(do_grow, size_t(size_t capacity));
-
-  void grow(size_t capacity) override {
-    this->set(this->data(), do_grow(capacity));
-  }
-
-  mock_buffer(T* data = nullptr, size_t buf_capacity = 0) {
-    this->set(data, buf_capacity);
-    ON_CALL(*this, do_grow(_)).WillByDefault(Invoke([](size_t capacity) {
-      return capacity;
-    }));
-  }
-};
-
-TEST(buffer_test, ctor) {
-  {
-    mock_buffer<int> buffer;
-    EXPECT_EQ(nullptr, buffer.data());
-    EXPECT_EQ(static_cast<size_t>(0), buffer.size());
-    EXPECT_EQ(static_cast<size_t>(0), buffer.capacity());
-  }
-  {
-    int dummy;
-    mock_buffer<int> buffer(&dummy);
-    EXPECT_EQ(&dummy, &buffer[0]);
-    EXPECT_EQ(static_cast<size_t>(0), buffer.size());
-    EXPECT_EQ(static_cast<size_t>(0), buffer.capacity());
-  }
-  {
-    int dummy;
-    size_t capacity = std::numeric_limits<size_t>::max();
-    mock_buffer<int> buffer(&dummy, capacity);
-    EXPECT_EQ(&dummy, &buffer[0]);
-    EXPECT_EQ(static_cast<size_t>(0), buffer.size());
-    EXPECT_EQ(capacity, buffer.capacity());
-  }
-}
-
-TEST(buffer_test, access) {
-  char data[10];
-  mock_buffer<char> buffer(data, sizeof(data));
-  buffer[0] = 11;
-  EXPECT_EQ(11, buffer[0]);
-  buffer[3] = 42;
-  EXPECT_EQ(42, *(&buffer[0] + 3));
-  const fmt::detail::buffer<char>& const_buffer = buffer;
-  EXPECT_EQ(42, const_buffer[3]);
-}
-
-TEST(buffer_test, try_resize) {
-  char data[123];
-  mock_buffer<char> buffer(data, sizeof(data));
-  buffer[10] = 42;
-  EXPECT_EQ(42, buffer[10]);
-  buffer.try_resize(20);
-  EXPECT_EQ(20u, buffer.size());
-  EXPECT_EQ(123u, buffer.capacity());
-  EXPECT_EQ(42, buffer[10]);
-  buffer.try_resize(5);
-  EXPECT_EQ(5u, buffer.size());
-  EXPECT_EQ(123u, buffer.capacity());
-  EXPECT_EQ(42, buffer[10]);
-  // Check if try_resize calls grow.
-  EXPECT_CALL(buffer, do_grow(124));
-  buffer.try_resize(124);
-  EXPECT_CALL(buffer, do_grow(200));
-  buffer.try_resize(200);
-}
-
-TEST(buffer_test, try_resize_partial) {
-  char data[10];
-  mock_buffer<char> buffer(data, sizeof(data));
-  EXPECT_CALL(buffer, do_grow(20)).WillOnce(Return(15));
-  buffer.try_resize(20);
-  EXPECT_EQ(buffer.capacity(), 15);
-  EXPECT_EQ(buffer.size(), 15);
-}
-
-TEST(buffer_test, clear) {
-  mock_buffer<char> buffer;
-  EXPECT_CALL(buffer, do_grow(20));
-  buffer.try_resize(20);
-  buffer.try_resize(0);
-  EXPECT_EQ(static_cast<size_t>(0), buffer.size());
-  EXPECT_EQ(20u, buffer.capacity());
-}
-
-TEST(buffer_test, append) {
-  char data[15];
-  mock_buffer<char> buffer(data, 10);
-  auto test = "test";
-  buffer.append(test, test + 5);
-  EXPECT_STREQ(test, &buffer[0]);
-  EXPECT_EQ(5u, buffer.size());
-  buffer.try_resize(10);
-  EXPECT_CALL(buffer, do_grow(12));
-  buffer.append(test, test + 2);
-  EXPECT_EQ('t', buffer[10]);
-  EXPECT_EQ('e', buffer[11]);
-  EXPECT_EQ(12u, buffer.size());
-}
-
-TEST(buffer_test, append_partial) {
-  char data[10];
-  mock_buffer<char> buffer(data, sizeof(data));
-  testing::InSequence seq;
-  EXPECT_CALL(buffer, do_grow(15)).WillOnce(Return(10));
-  EXPECT_CALL(buffer, do_grow(15)).WillOnce(Invoke([&buffer](size_t) {
-    EXPECT_EQ(fmt::string_view(buffer.data(), buffer.size()), "0123456789");
-    buffer.clear();
-    return 10;
-  }));
-  auto test = "0123456789abcde";
-  buffer.append(test, test + 15);
-}
-
-TEST(buffer_test, append_allocates_enough_storage) {
-  char data[19];
-  mock_buffer<char> buffer(data, 10);
-  auto test = "abcdefgh";
-  buffer.try_resize(10);
-  EXPECT_CALL(buffer, do_grow(19));
-  buffer.append(test, test + 9);
-}
-
-struct custom_context {
-  using char_type = char;
-  using parse_context_type = fmt::format_parse_context;
-
-  bool called = false;
-
-  template <typename T> struct formatter_type {
-    auto parse(fmt::format_parse_context& ctx) -> decltype(ctx.begin()) {
-      return ctx.begin();
-    }
-
-    const char* format(const T&, custom_context& ctx) {
-      ctx.called = true;
-      return nullptr;
-    }
-  };
-
-  void advance_to(const char*) {}
-};
-
-struct test_struct {};
-
-FMT_BEGIN_NAMESPACE
-template <typename Char> struct formatter<test_struct, Char> {
-  auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  auto format(test_struct, format_context& ctx) -> decltype(ctx.out()) {
-    auto test = string_view("test");
-    return std::copy_n(test.data(), test.size(), ctx.out());
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(arg_test, format_args) {
-  auto args = fmt::format_args();
-  EXPECT_FALSE(args.get(1));
-}
-
-TEST(arg_test, make_value_with_custom_context) {
-  auto t = test_struct();
-  fmt::detail::value<custom_context> arg(
-      fmt::detail::arg_mapper<custom_context>().map(t));
-  auto ctx = custom_context();
-  auto parse_ctx = fmt::format_parse_context("");
-  arg.custom.format(&t, parse_ctx, ctx);
-  EXPECT_TRUE(ctx.called);
-}
-
-// Use a unique result type to make sure that there are no undesirable
-// conversions.
-struct test_result {};
-
-template <typename T> struct mock_visitor {
-  template <typename U> struct result { using type = test_result; };
-
-  mock_visitor() {
-    ON_CALL(*this, visit(_)).WillByDefault(Return(test_result()));
-  }
-
-  MOCK_METHOD1_T(visit, test_result(T value));
-  MOCK_METHOD0_T(unexpected, void());
-
-  test_result operator()(T value) { return visit(value); }
-
-  template <typename U> test_result operator()(U) {
-    unexpected();
-    return test_result();
-  }
-};
-
-template <typename T> struct visit_type { using type = T; };
-
-#define VISIT_TYPE(type_, visit_type_) \
-  template <> struct visit_type<type_> { using type = visit_type_; }
-
-VISIT_TYPE(signed char, int);
-VISIT_TYPE(unsigned char, unsigned);
-VISIT_TYPE(short, int);
-VISIT_TYPE(unsigned short, unsigned);
-
-#if LONG_MAX == INT_MAX
-VISIT_TYPE(long, int);
-VISIT_TYPE(unsigned long, unsigned);
-#else
-VISIT_TYPE(long, long long);
-VISIT_TYPE(unsigned long, unsigned long long);
-#endif
-
-#define CHECK_ARG(Char, expected, value)                                  \
-  {                                                                       \
-    testing::StrictMock<mock_visitor<decltype(expected)>> visitor;        \
-    EXPECT_CALL(visitor, visit(expected));                                \
-    using iterator = std::back_insert_iterator<buffer<Char>>;             \
-    fmt::visit_format_arg(                                                \
-        visitor,                                                          \
-        fmt::detail::make_arg<fmt::basic_format_context<iterator, Char>>( \
-            value));                                                      \
-  }
-
-#define CHECK_ARG_SIMPLE(value)                             \
-  {                                                         \
-    using value_type = decltype(value);                     \
-    typename visit_type<value_type>::type expected = value; \
-    CHECK_ARG(char, expected, value)                        \
-    CHECK_ARG(wchar_t, expected, value)                     \
-  }
-
-template <typename T> class numeric_arg_test : public testing::Test {};
-
-using types =
-    testing::Types<bool, signed char, unsigned char, short, unsigned short, int,
-                   unsigned, long, unsigned long, long long, unsigned long long,
-                   float, double, long double>;
-TYPED_TEST_SUITE(numeric_arg_test, types);
-
-template <typename T, fmt::enable_if_t<std::is_integral<T>::value, int> = 0>
-T test_value() {
-  return static_cast<T>(42);
-}
-
-template <typename T,
-          fmt::enable_if_t<std::is_floating_point<T>::value, int> = 0>
-T test_value() {
-  return static_cast<T>(4.2);
-}
-
-TYPED_TEST(numeric_arg_test, make_and_visit) {
-  CHECK_ARG_SIMPLE(test_value<TypeParam>());
-  CHECK_ARG_SIMPLE(std::numeric_limits<TypeParam>::min());
-  CHECK_ARG_SIMPLE(std::numeric_limits<TypeParam>::max());
-}
-
-TEST(arg_test, char_arg) { CHECK_ARG(char, 'a', 'a'); }
-
-TEST(arg_test, string_arg) {
-  char str_data[] = "test";
-  char* str = str_data;
-  const char* cstr = str;
-  CHECK_ARG(char, cstr, str);
-
-  auto sv = fmt::string_view(str);
-  CHECK_ARG(char, sv, std::string(str));
-}
-
-TEST(arg_test, wstring_arg) {
-  wchar_t str_data[] = L"test";
-  wchar_t* str = str_data;
-  const wchar_t* cstr = str;
-
-  auto sv = fmt::basic_string_view<wchar_t>(str);
-  CHECK_ARG(wchar_t, cstr, str);
-  CHECK_ARG(wchar_t, cstr, cstr);
-  CHECK_ARG(wchar_t, sv, std::wstring(str));
-  CHECK_ARG(wchar_t, sv, fmt::basic_string_view<wchar_t>(str));
-}
-
-TEST(arg_test, pointer_arg) {
-  void* p = nullptr;
-  const void* cp = nullptr;
-  CHECK_ARG(char, cp, p);
-  CHECK_ARG(wchar_t, cp, p);
-  CHECK_ARG_SIMPLE(cp);
-}
-
-struct check_custom {
-  test_result operator()(
-      fmt::basic_format_arg<fmt::format_context>::handle h) const {
-    struct test_buffer final : fmt::detail::buffer<char> {
-      char data[10];
-      test_buffer() : fmt::detail::buffer<char>(data, 0, 10) {}
-      void grow(size_t) override {}
-    } buffer;
-    auto parse_ctx = fmt::format_parse_context("");
-    auto ctx = fmt::format_context(fmt::detail::buffer_appender<char>(buffer),
-                                   fmt::format_args());
-    h.format(parse_ctx, ctx);
-    EXPECT_EQ("test", std::string(buffer.data, buffer.size()));
-    return test_result();
-  }
-};
-
-TEST(arg_test, custom_arg) {
-  auto test = test_struct();
-  using visitor =
-      mock_visitor<fmt::basic_format_arg<fmt::format_context>::handle>;
-  testing::StrictMock<visitor> v;
-  EXPECT_CALL(v, visit(_)).WillOnce(Invoke(check_custom()));
-  fmt::visit_format_arg(v, fmt::detail::make_arg<fmt::format_context>(test));
-}
-
-TEST(arg_test, visit_invalid_arg) {
-  testing::StrictMock<mock_visitor<fmt::monostate>> visitor;
-  EXPECT_CALL(visitor, visit(_));
-  auto arg = fmt::basic_format_arg<fmt::format_context>();
-  fmt::visit_format_arg(visitor, arg);
-}
-
-#if FMT_USE_CONSTEXPR
-
-enum class arg_id_result { none, empty, index, name, error };
-struct test_arg_id_handler {
-  arg_id_result res = arg_id_result::none;
-  int index = 0;
-  string_view name;
-
-  constexpr void operator()() { res = arg_id_result::empty; }
-
-  constexpr void operator()(int i) {
-    res = arg_id_result::index;
-    index = i;
-  }
-
-  constexpr void operator()(string_view n) {
-    res = arg_id_result::name;
-    name = n;
-  }
-
-  constexpr void on_error(const char*) { res = arg_id_result::error; }
-};
-
-template <size_t N>
-constexpr test_arg_id_handler parse_arg_id(const char (&s)[N]) {
-  test_arg_id_handler h;
-  fmt::detail::parse_arg_id(s, s + N, h);
-  return h;
-}
-
-TEST(format_test, constexpr_parse_arg_id) {
-  static_assert(parse_arg_id(":").res == arg_id_result::empty, "");
-  static_assert(parse_arg_id("}").res == arg_id_result::empty, "");
-  static_assert(parse_arg_id("42:").res == arg_id_result::index, "");
-  static_assert(parse_arg_id("42:").index == 42, "");
-  static_assert(parse_arg_id("foo:").res == arg_id_result::name, "");
-  static_assert(parse_arg_id("foo:").name.size() == 3, "");
-  static_assert(parse_arg_id("!").res == arg_id_result::error, "");
-}
-
-struct test_format_specs_handler {
-  enum result { none, hash, zero, loc, error };
-  result res = none;
-
-  fmt::align_t alignment = fmt::align::none;
-  fmt::sign_t sign = fmt::sign::none;
-  char fill = 0;
-  int width = 0;
-  fmt::detail::arg_ref<char> width_ref;
-  int precision = 0;
-  fmt::detail::arg_ref<char> precision_ref;
-  fmt::presentation_type type = fmt::presentation_type::none;
-
-  // Workaround for MSVC2017 bug that results in "expression did not evaluate
-  // to a constant" with compiler-generated copy ctor.
-  constexpr test_format_specs_handler() {}
-  constexpr test_format_specs_handler(const test_format_specs_handler& other) =
-      default;
-
-  constexpr void on_align(fmt::align_t a) { alignment = a; }
-  constexpr void on_fill(fmt::string_view f) { fill = f[0]; }
-  constexpr void on_sign(fmt::sign_t s) { sign = s; }
-  constexpr void on_hash() { res = hash; }
-  constexpr void on_zero() { res = zero; }
-  constexpr void on_localized() { res = loc; }
-
-  constexpr void on_width(int w) { width = w; }
-  constexpr void on_dynamic_width(fmt::detail::auto_id) {}
-  constexpr void on_dynamic_width(int index) { width_ref = index; }
-  constexpr void on_dynamic_width(string_view) {}
-
-  constexpr void on_precision(int p) { precision = p; }
-  constexpr void on_dynamic_precision(fmt::detail::auto_id) {}
-  constexpr void on_dynamic_precision(int index) { precision_ref = index; }
-  constexpr void on_dynamic_precision(string_view) {}
-
-  constexpr void end_precision() {}
-  constexpr void on_type(fmt::presentation_type t) { type = t; }
-  constexpr void on_error(const char*) { res = error; }
-};
-
-template <size_t N>
-constexpr test_format_specs_handler parse_test_specs(const char (&s)[N]) {
-  auto h = test_format_specs_handler();
-  fmt::detail::parse_format_specs(s, s + N - 1, h);
-  return h;
-}
-
-TEST(core_test, constexpr_parse_format_specs) {
-  using handler = test_format_specs_handler;
-  static_assert(parse_test_specs("<").alignment == fmt::align::left, "");
-  static_assert(parse_test_specs("*^").fill == '*', "");
-  static_assert(parse_test_specs("+").sign == fmt::sign::plus, "");
-  static_assert(parse_test_specs("-").sign == fmt::sign::minus, "");
-  static_assert(parse_test_specs(" ").sign == fmt::sign::space, "");
-  static_assert(parse_test_specs("#").res == handler::hash, "");
-  static_assert(parse_test_specs("0").res == handler::zero, "");
-  static_assert(parse_test_specs("L").res == handler::loc, "");
-  static_assert(parse_test_specs("42").width == 42, "");
-  static_assert(parse_test_specs("{42}").width_ref.val.index == 42, "");
-  static_assert(parse_test_specs(".42").precision == 42, "");
-  static_assert(parse_test_specs(".{42}").precision_ref.val.index == 42, "");
-  static_assert(parse_test_specs("d").type == fmt::presentation_type::dec, "");
-  static_assert(parse_test_specs("{<").res == handler::error, "");
-}
-
-struct test_parse_context {
-  using char_type = char;
-
-  constexpr int next_arg_id() { return 11; }
-  template <typename Id> FMT_CONSTEXPR void check_arg_id(Id) {}
-
-  constexpr const char* begin() { return nullptr; }
-  constexpr const char* end() { return nullptr; }
-
-  void on_error(const char*) {}
-};
-
-template <size_t N>
-constexpr fmt::detail::dynamic_format_specs<char> parse_dynamic_specs(
-    const char (&s)[N]) {
-  auto specs = fmt::detail::dynamic_format_specs<char>();
-  auto ctx = test_parse_context();
-  auto h = fmt::detail::dynamic_specs_handler<test_parse_context>(specs, ctx);
-  parse_format_specs(s, s + N - 1, h);
-  return specs;
-}
-
-TEST(format_test, constexpr_dynamic_specs_handler) {
-  static_assert(parse_dynamic_specs("<").align == fmt::align::left, "");
-  static_assert(parse_dynamic_specs("*^").fill[0] == '*', "");
-  static_assert(parse_dynamic_specs("+").sign == fmt::sign::plus, "");
-  static_assert(parse_dynamic_specs("-").sign == fmt::sign::minus, "");
-  static_assert(parse_dynamic_specs(" ").sign == fmt::sign::space, "");
-  static_assert(parse_dynamic_specs("#").alt, "");
-  static_assert(parse_dynamic_specs("0").align == fmt::align::numeric, "");
-  static_assert(parse_dynamic_specs("42").width == 42, "");
-  static_assert(parse_dynamic_specs("{}").width_ref.val.index == 11, "");
-  static_assert(parse_dynamic_specs("{42}").width_ref.val.index == 42, "");
-  static_assert(parse_dynamic_specs(".42").precision == 42, "");
-  static_assert(parse_dynamic_specs(".{}").precision_ref.val.index == 11, "");
-  static_assert(parse_dynamic_specs(".{42}").precision_ref.val.index == 42, "");
-  static_assert(parse_dynamic_specs("d").type == fmt::presentation_type::dec,
-                "");
-}
-
-template <size_t N>
-constexpr test_format_specs_handler check_specs(const char (&s)[N]) {
-  fmt::detail::specs_checker<test_format_specs_handler> checker(
-      test_format_specs_handler(), fmt::detail::type::double_type);
-  parse_format_specs(s, s + N - 1, checker);
-  return checker;
-}
-
-TEST(format_test, constexpr_specs_checker) {
-  using handler = test_format_specs_handler;
-  static_assert(check_specs("<").alignment == fmt::align::left, "");
-  static_assert(check_specs("*^").fill == '*', "");
-  static_assert(check_specs("+").sign == fmt::sign::plus, "");
-  static_assert(check_specs("-").sign == fmt::sign::minus, "");
-  static_assert(check_specs(" ").sign == fmt::sign::space, "");
-  static_assert(check_specs("#").res == handler::hash, "");
-  static_assert(check_specs("0").res == handler::zero, "");
-  static_assert(check_specs("42").width == 42, "");
-  static_assert(check_specs("{42}").width_ref.val.index == 42, "");
-  static_assert(check_specs(".42").precision == 42, "");
-  static_assert(check_specs(".{42}").precision_ref.val.index == 42, "");
-  static_assert(check_specs("d").type == fmt::presentation_type::dec, "");
-  static_assert(check_specs("{<").res == handler::error, "");
-}
-
-struct test_format_string_handler {
-  constexpr void on_text(const char*, const char*) {}
-
-  constexpr int on_arg_id() { return 0; }
-
-  template <typename T> constexpr int on_arg_id(T) { return 0; }
-
-  constexpr void on_replacement_field(int, const char*) {}
-
-  constexpr const char* on_format_specs(int, const char* begin, const char*) {
-    return begin;
-  }
-
-  constexpr void on_error(const char*) { error = true; }
-
-  bool error = false;
-};
-
-template <size_t N> constexpr bool parse_string(const char (&s)[N]) {
-  auto h = test_format_string_handler();
-  fmt::detail::parse_format_string<true>(fmt::string_view(s, N - 1), h);
-  return !h.error;
-}
-
-TEST(format_test, constexpr_parse_format_string) {
-  static_assert(parse_string("foo"), "");
-  static_assert(!parse_string("}"), "");
-  static_assert(parse_string("{}"), "");
-  static_assert(parse_string("{42}"), "");
-  static_assert(parse_string("{foo}"), "");
-  static_assert(parse_string("{:}"), "");
-}
-#endif  // FMT_USE_CONSTEXPR
-
-struct enabled_formatter {};
-struct disabled_formatter {};
-struct disabled_formatter_convertible {
-  operator int() const { return 42; }
-};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<enabled_formatter> {
-  auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-  auto format(enabled_formatter, format_context& ctx) -> decltype(ctx.out()) {
-    return ctx.out();
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(core_test, has_formatter) {
-  using fmt::has_formatter;
-  using context = fmt::format_context;
-  static_assert(has_formatter<enabled_formatter, context>::value, "");
-  static_assert(!has_formatter<disabled_formatter, context>::value, "");
-  static_assert(!has_formatter<disabled_formatter_convertible, context>::value,
-                "");
-}
-
-struct const_formattable {};
-struct nonconst_formattable {};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<const_formattable> {
-  auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  auto format(const const_formattable&, format_context& ctx)
-      -> decltype(ctx.out()) {
-    auto test = string_view("test");
-    return std::copy_n(test.data(), test.size(), ctx.out());
-  }
-};
-
-template <> struct formatter<nonconst_formattable> {
-  auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  auto format(nonconst_formattable&, format_context& ctx)
-      -> decltype(ctx.out()) {
-    auto test = string_view("test");
-    return std::copy_n(test.data(), test.size(), ctx.out());
-  }
-};
-FMT_END_NAMESPACE
-
-struct convertible_to_pointer {
-  operator const int*() const { return nullptr; }
-};
-
-enum class test_scoped_enum {};
-
-TEST(core_test, is_formattable) {
-#if 0
-  // This should be enabled once corresponding map overloads are gone.
-  static_assert(fmt::is_formattable<signed char*>::value, "");
-  static_assert(fmt::is_formattable<unsigned char*>::value, "");
-  static_assert(fmt::is_formattable<const signed char*>::value, "");
-  static_assert(fmt::is_formattable<const unsigned char*>::value, "");
-#endif
-  static_assert(!fmt::is_formattable<wchar_t>::value, "");
-#ifdef __cpp_char8_t
-  static_assert(!fmt::is_formattable<char8_t>::value, "");
-#endif
-  static_assert(!fmt::is_formattable<char16_t>::value, "");
-  static_assert(!fmt::is_formattable<char32_t>::value, "");
-  static_assert(!fmt::is_formattable<const wchar_t*>::value, "");
-  static_assert(!fmt::is_formattable<const wchar_t[3]>::value, "");
-  static_assert(!fmt::is_formattable<fmt::basic_string_view<wchar_t>>::value,
-                "");
-  static_assert(fmt::is_formattable<enabled_formatter>::value, "");
-  static_assert(!fmt::is_formattable<disabled_formatter>::value, "");
-  static_assert(fmt::is_formattable<disabled_formatter_convertible>::value, "");
-
-  static_assert(fmt::is_formattable<const_formattable&>::value, "");
-  static_assert(fmt::is_formattable<const const_formattable&>::value, "");
-
-  static_assert(fmt::is_formattable<nonconst_formattable&>::value, "");
-#if !FMT_MSC_VER || FMT_MSC_VER >= 1910
-  static_assert(!fmt::is_formattable<const nonconst_formattable&>::value, "");
-#endif
-
-  static_assert(!fmt::is_formattable<convertible_to_pointer>::value, "");
-
-  static_assert(!fmt::is_formattable<void (*)()>::value, "");
-
-  struct s;
-
-  static_assert(!fmt::is_formattable<int(s::*)>::value, "");
-  static_assert(!fmt::is_formattable<int (s::*)()>::value, "");
-  static_assert(!fmt::is_formattable<test_scoped_enum>::value, "");
-}
-
-TEST(core_test, format) { EXPECT_EQ(fmt::format("{}", 42), "42"); }
-
-TEST(core_test, format_to) {
-  std::string s;
-  fmt::format_to(std::back_inserter(s), "{}", 42);
-  EXPECT_EQ(s, "42");
-}
-
-struct convertible_to_int {
-  operator int() const { return 42; }
-};
-
-struct convertible_to_c_string {
-  operator const char*() const { return "foo"; }
-};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<convertible_to_int> {
-  auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-  auto format(convertible_to_int, format_context& ctx) -> decltype(ctx.out()) {
-    return std::copy_n("foo", 3, ctx.out());
-  }
-};
-
-template <> struct formatter<convertible_to_c_string> {
-  FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-  auto format(convertible_to_c_string, format_context& ctx)
-      -> decltype(ctx.out()) {
-    return std::copy_n("bar", 3, ctx.out());
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(core_test, formatter_overrides_implicit_conversion) {
-  EXPECT_EQ(fmt::format("{}", convertible_to_int()), "foo");
-  EXPECT_EQ(fmt::format("{}", convertible_to_c_string()), "bar");
-}
-
-// Test that check is not found by ADL.
-template <typename T> void check(T);
-TEST(core_test, adl_check) {
-  EXPECT_EQ(fmt::format("{}", test_struct()), "test");
-}
-
-TEST(core_test, to_string_view_foreign_strings) {
-  using namespace test_ns;
-  EXPECT_EQ(to_string_view(test_string<char>("42")), "42");
-  fmt::detail::type type =
-      fmt::detail::mapped_type_constant<test_string<char>,
-                                        fmt::format_context>::value;
-  EXPECT_EQ(type, fmt::detail::type::string_type);
-}
-
-struct implicitly_convertible_to_string {
-  operator std::string() const { return "foo"; }
-};
-
-struct implicitly_convertible_to_string_view {
-  operator fmt::string_view() const { return "foo"; }
-};
-
-TEST(core_test, format_implicitly_convertible_to_string_view) {
-  EXPECT_EQ("foo", fmt::format("{}", implicitly_convertible_to_string_view()));
-}
-
-// std::is_constructible is broken in MSVC until version 2015.
-#if !FMT_MSC_VER || FMT_MSC_VER >= 1900
-struct explicitly_convertible_to_string_view {
-  explicit operator fmt::string_view() const { return "foo"; }
-};
-
-TEST(core_test, format_explicitly_convertible_to_string_view) {
-  EXPECT_EQ("foo", fmt::format("{}", explicitly_convertible_to_string_view()));
-}
-
-#  ifdef FMT_USE_STRING_VIEW
-struct explicitly_convertible_to_std_string_view {
-  explicit operator std::string_view() const { return "foo"; }
-};
-
-TEST(core_test, format_explicitly_convertible_to_std_string_view) {
-  EXPECT_EQ("foo",
-            fmt::format("{}", explicitly_convertible_to_std_string_view()));
-}
-#  endif
-#endif
-
-struct convertible_to_long_long {
-  operator long long() const { return 1LL << 32; }
-};
-
-TEST(format_test, format_convertible_to_long_long) {
-  EXPECT_EQ("100000000", fmt::format("{:x}", convertible_to_long_long()));
-}
-
-struct disabled_rvalue_conversion {
-  operator const char*() const& { return "foo"; }
-  operator const char*() & { return "foo"; }
-  operator const char*() const&& = delete;
-  operator const char*() && = delete;
-};
-
-TEST(core_test, disabled_rvalue_conversion) {
-  EXPECT_EQ("foo", fmt::format("{}", disabled_rvalue_conversion()));
-}
-
-namespace adl_test {
-template <typename... T> void make_format_args(const T&...) = delete;
-
-struct string : std::string {};
-}  // namespace adl_test
-
-// Test that formatting functions compile when make_format_args is found by ADL.
-TEST(core_test, adl) {
-  // Only check compilation and don't run the code to avoid polluting the output
-  // and since the output is tested elsewhere.
-  if (fmt::detail::const_check(true)) return;
-  auto s = adl_test::string();
-  char buf[10];
-  (void)fmt::format("{}", s);
-  fmt::format_to(buf, "{}", s);
-  fmt::format_to_n(buf, 10, "{}", s);
-  (void)fmt::formatted_size("{}", s);
-  fmt::print("{}", s);
-  fmt::print(stdout, "{}", s);
-}
-
-TEST(core_test, has_const_formatter) {
-  EXPECT_TRUE((fmt::detail::has_const_formatter<const_formattable,
-                                                fmt::format_context>()));
-  EXPECT_FALSE((fmt::detail::has_const_formatter<nonconst_formattable,
-                                                 fmt::format_context>()));
-}
-
-TEST(core_test, format_nonconst) {
-  EXPECT_EQ(fmt::format("{}", nonconst_formattable()), "test");
-}
diff --git a/3rdparty/fmt/test/cuda-test/CMakeLists.txt b/3rdparty/fmt/test/cuda-test/CMakeLists.txt
deleted file mode 100644
index be8685b8..00000000
--- a/3rdparty/fmt/test/cuda-test/CMakeLists.txt
+++ /dev/null
@@ -1,73 +0,0 @@
-# We can find some usecases which follow the guide of CMake which uses
-# `enable_language(CUDA)` instead of `find_package(CUDA)` and let the CMake
-# built-in functions use NVCC.
-
-# See: https://cmake.org/cmake/help/latest/module/FindCUDA.html#replacement
-#
-# However, this requires CMake version 3.10 or higher and we can't be sure most
-# of the CUDA projects are using those.
-#
-# This test relies on `find_package(CUDA)` in the parent CMake config.
-
-# These can be updated when NVCC becomes ready for C++ 17 features
-# https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#cpp14-language-features
-set(CMAKE_CUDA_STANDARD 14)
-set(CMAKE_CUDA_STANDARD_REQUIRED 14)
-
-# In this test, we assume that the user is going to compile CUDA source code
-# with some libraries (fmt in this case).
-#
-# In addition to that, this test invokes both the C++ host compiler and NVCC
-# by providing another (non-CUDA) C++ source code.
-if (${CMAKE_VERSION} VERSION_LESS 3.15)
-  # https://docs.nvidia.com/cuda/cuda-compiler-driver-nvcc/index.html
-  list(APPEND CUDA_NVCC_FLAGS "-std=c++14")
-  if (MSVC)
-    # This is the solution of pytorch:
-    # https://github.com/pytorch/pytorch/pull/7118
-    list(APPEND CUDA_NVCC_FLAGS "-Xcompiler" "/std:c++14")
-    list(APPEND CUDA_NVCC_FLAGS "-Xcompiler" "/Zc:__cplusplus")
-    # for the reason of this -Xcompiler options, see below.
-  endif ()
-  cuda_add_executable(fmt-in-cuda-test cuda-cpp14.cu cpp14.cc)
-  target_compile_features(fmt-in-cuda-test PRIVATE cxx_std_14)
-  if (MSVC)
-    # This part is for (non-CUDA) C++ code. MSVC can define incorrect
-    # `__cplusplus` macro. Fix for the issue is to use additional compiler flag. 
-    #
-    # See Also:
-    # https://devblogs.microsoft.com/cppblog/msvc-now-correctly-reports-__cplusplus/
-    # https://github.com/Microsoft/vscode-cpptools/issues/2595
-    target_compile_options(fmt-in-cuda-test PRIVATE /Zc:__cplusplus /permissive-)
-  endif ()
-else()
-  # now using a "new" way of handling CUDA
-  add_executable(fmt-in-cuda-test cuda-cpp14.cu cpp14.cc)
-  set_target_properties(fmt-in-cuda-test PROPERTIES CUDA_SEPARABLE_COMPILATION ON)
-  target_compile_features(fmt-in-cuda-test PRIVATE cxx_std_14)
-  if (MSVC)
-    # with MSVC, 'cxx_std_14' will only propagate to the host code (MSVC), but will
-    # not set __cplusplus correctly anyway, while nvcc will ignore it.
-    # If specified for nvcc on the command line as '-std=c++14' nvcc will emit this
-    # message instead:
-    # nvcc warning : The -std=c++14 flag is not supported with the configured host
-    #                compiler. Flag will be ignored.
-    set_property(SOURCE cuda-cpp14.cu APPEND PROPERTY
-      COMPILE_OPTIONS -Xcompiler /std:c++14 -Xcompiler /Zc:__cplusplus)
-    set_property(SOURCE cpp14.cc APPEND PROPERTY
-      COMPILE_OPTIONS /std:c++14 /Zc:__cplusplus)
-  endif()
-endif()
-
-get_target_property(IN_USE_CUDA_STANDARD fmt-in-cuda-test CUDA_STANDARD)
-message(STATUS "cuda_standard:          ${IN_USE_CUDA_STANDARD}")
-
-get_target_property(IN_USE_CUDA_STANDARD_REQUIRED
-    fmt-in-cuda-test CUDA_STANDARD_REQUIRED)
-message(STATUS "cuda_standard_required: ${IN_USE_CUDA_STANDARD_REQUIRED}")
-
-# We don't use PUBLIC or other keyword for reasons explained in the
-# CUDA_LINK_LIBRARIES_KEYWORD section in
-# https://cmake.org/cmake/help/latest/module/FindCUDA.html
-target_link_libraries(fmt-in-cuda-test fmt::fmt)
-
diff --git a/3rdparty/fmt/test/cuda-test/cpp14.cc b/3rdparty/fmt/test/cuda-test/cpp14.cc
deleted file mode 100644
index ad846396..00000000
--- a/3rdparty/fmt/test/cuda-test/cpp14.cc
+++ /dev/null
@@ -1,11 +0,0 @@
-#include <fmt/core.h>
-
-// The purpose of this part is to ensure NVCC's host compiler also supports
-// the standard version. See 'cuda-cpp14.cu'.
-//
-// https://en.cppreference.com/w/cpp/preprocessor/replace#Predefined_macros
-static_assert(__cplusplus >= 201402L, "expect C++ 2014 for host compiler");
-
-auto make_message_cpp() -> std::string {
-  return fmt::format("host compiler \t: __cplusplus == {}", __cplusplus);
-}
diff --git a/3rdparty/fmt/test/cuda-test/cuda-cpp14.cu b/3rdparty/fmt/test/cuda-test/cuda-cpp14.cu
deleted file mode 100644
index 76a9d088..00000000
--- a/3rdparty/fmt/test/cuda-test/cuda-cpp14.cu
+++ /dev/null
@@ -1,28 +0,0 @@
-//  Direct NVCC command line example:
-//
-//  nvcc ./cuda-cpp14.cu -x cu -I"../include" -l"fmtd" -L"../build/Debug" \
-//       -std=c++14 -Xcompiler /std:c++14 -Xcompiler /Zc:__cplusplus
-
-// Ensure that we are using the latest C++ standard for NVCC
-// The version is C++14
-//
-// https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#c-cplusplus-language-support
-// https://en.cppreference.com/w/cpp/preprocessor/replace#Predefined_macros
-static_assert(__cplusplus >= 201402L, "expect C++ 2014 for nvcc");
-
-#include <fmt/core.h>
-
-#include <cuda.h>
-#include <iostream>
-
-extern auto make_message_cpp() -> std::string;
-extern auto make_message_cuda() -> std::string;
-
-int main() {
-  std::cout << make_message_cuda() << std::endl;
-  std::cout << make_message_cpp() << std::endl;
-}
-
-auto make_message_cuda() -> std::string {
-  return fmt::format("nvcc compiler \t: __cplusplus == {}", __cplusplus);
-}
diff --git a/3rdparty/fmt/test/enforce-checks-test.cc b/3rdparty/fmt/test/enforce-checks-test.cc
deleted file mode 100644
index c77cb142..00000000
--- a/3rdparty/fmt/test/enforce-checks-test.cc
+++ /dev/null
@@ -1,63 +0,0 @@
-// Formatting library for C++ - formatting library tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include <iterator>
-#include <vector>
-
-#include "fmt/chrono.h"
-#include "fmt/color.h"
-#include "fmt/format.h"
-#include "fmt/ostream.h"
-#include "fmt/ranges.h"
-#include "fmt/xchar.h"
-
-// Exercise the API to verify that everything we expect to can compile.
-void test_format_api() {
-  (void)fmt::format(FMT_STRING("{}"), 42);
-  (void)fmt::format(FMT_STRING(L"{}"), 42);
-  (void)fmt::format(FMT_STRING("noop"));
-
-  (void)fmt::to_string(42);
-  (void)fmt::to_wstring(42);
-
-  std::vector<char> out;
-  fmt::format_to(std::back_inserter(out), FMT_STRING("{}"), 42);
-
-  char buffer[4];
-  fmt::format_to_n(buffer, 3, FMT_STRING("{}"), 12345);
-
-  wchar_t wbuffer[4];
-  fmt::format_to_n(wbuffer, 3, FMT_STRING(L"{}"), 12345);
-}
-
-void test_chrono() {
-  (void)fmt::format(FMT_STRING("{}"), std::chrono::seconds(42));
-  (void)fmt::format(FMT_STRING(L"{}"), std::chrono::seconds(42));
-}
-
-void test_text_style() {
-  fmt::print(fg(fmt::rgb(255, 20, 30)), FMT_STRING("{}"), "rgb(255,20,30)");
-  (void)fmt::format(fg(fmt::rgb(255, 20, 30)), FMT_STRING("{}"),
-                    "rgb(255,20,30)");
-
-  fmt::text_style ts = fg(fmt::rgb(255, 20, 30));
-  std::string out;
-  fmt::format_to(std::back_inserter(out), ts,
-                 FMT_STRING("rgb(255,20,30){}{}{}"), 1, 2, 3);
-}
-
-void test_range() {
-  std::vector<char> hello = {'h', 'e', 'l', 'l', 'o'};
-  (void)fmt::format(FMT_STRING("{}"), hello);
-}
-
-int main() {
-  test_format_api();
-  test_chrono();
-  test_text_style();
-  test_range();
-}
diff --git a/3rdparty/fmt/test/find-package-test/CMakeLists.txt b/3rdparty/fmt/test/find-package-test/CMakeLists.txt
deleted file mode 100644
index 93d686e6..00000000
--- a/3rdparty/fmt/test/find-package-test/CMakeLists.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-cmake_minimum_required(VERSION 3.1...3.18)
-
-project(fmt-test)
-
-find_package(FMT REQUIRED)
-
-add_executable(library-test main.cc)
-target_link_libraries(library-test fmt::fmt)
-target_compile_options(library-test PRIVATE ${PEDANTIC_COMPILE_FLAGS})
-target_include_directories(library-test PUBLIC SYSTEM .)
-
-if (TARGET fmt::fmt-header-only)
-  add_executable(header-only-test main.cc)
-  target_link_libraries(header-only-test fmt::fmt-header-only)
-  target_compile_options(header-only-test PRIVATE ${PEDANTIC_COMPILE_FLAGS})
-  target_include_directories(header-only-test PUBLIC SYSTEM .)
-endif ()
diff --git a/3rdparty/fmt/test/find-package-test/main.cc b/3rdparty/fmt/test/find-package-test/main.cc
deleted file mode 100644
index 911e0e8d..00000000
--- a/3rdparty/fmt/test/find-package-test/main.cc
+++ /dev/null
@@ -1,5 +0,0 @@
-#include "fmt/format.h"
-
-int main(int argc, char** argv) {
-  for (int i = 0; i < argc; ++i) fmt::print("{}: {}\n", i, argv[i]);
-}
diff --git a/3rdparty/fmt/test/format-impl-test.cc b/3rdparty/fmt/test/format-impl-test.cc
deleted file mode 100644
index a012306f..00000000
--- a/3rdparty/fmt/test/format-impl-test.cc
+++ /dev/null
@@ -1,377 +0,0 @@
-// Formatting library for C++ - formatting library implementation tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include <algorithm>
-#include <cstring>
-
-// clang-format off
-#include "test-assert.h"
-// clang-format on
-
-#include "fmt/format.h"
-#include "gmock/gmock.h"
-#include "util.h"
-
-using fmt::detail::bigint;
-using fmt::detail::fp;
-using fmt::detail::max_value;
-
-static_assert(!std::is_copy_constructible<bigint>::value, "");
-static_assert(!std::is_copy_assignable<bigint>::value, "");
-
-TEST(bigint_test, construct) {
-  EXPECT_EQ("", fmt::format("{}", bigint()));
-  EXPECT_EQ("42", fmt::format("{}", bigint(0x42)));
-  EXPECT_EQ("123456789abcedf0", fmt::format("{}", bigint(0x123456789abcedf0)));
-}
-
-TEST(bigint_test, compare) {
-  bigint n1(42);
-  bigint n2(42);
-  EXPECT_EQ(compare(n1, n2), 0);
-  n2 <<= 32;
-  EXPECT_LT(compare(n1, n2), 0);
-  bigint n3(43);
-  EXPECT_LT(compare(n1, n3), 0);
-  EXPECT_GT(compare(n3, n1), 0);
-  bigint n4(42 * 0x100000001);
-  EXPECT_LT(compare(n2, n4), 0);
-  EXPECT_GT(compare(n4, n2), 0);
-}
-
-TEST(bigint_test, add_compare) {
-  EXPECT_LT(
-      add_compare(bigint(0xffffffff), bigint(0xffffffff), bigint(1) <<= 64), 0);
-  EXPECT_LT(add_compare(bigint(1) <<= 32, bigint(1), bigint(1) <<= 96), 0);
-  EXPECT_GT(add_compare(bigint(1) <<= 32, bigint(0), bigint(0xffffffff)), 0);
-  EXPECT_GT(add_compare(bigint(0), bigint(1) <<= 32, bigint(0xffffffff)), 0);
-  EXPECT_GT(add_compare(bigint(42), bigint(1), bigint(42)), 0);
-  EXPECT_GT(add_compare(bigint(0xffffffff), bigint(1), bigint(0xffffffff)), 0);
-  EXPECT_LT(add_compare(bigint(10), bigint(10), bigint(22)), 0);
-  EXPECT_LT(add_compare(bigint(0x100000010), bigint(0x100000010),
-                        bigint(0x300000010)),
-            0);
-  EXPECT_GT(add_compare(bigint(0x1ffffffff), bigint(0x100000002),
-                        bigint(0x300000000)),
-            0);
-  EXPECT_EQ(add_compare(bigint(0x1ffffffff), bigint(0x100000002),
-                        bigint(0x300000001)),
-            0);
-  EXPECT_LT(add_compare(bigint(0x1ffffffff), bigint(0x100000002),
-                        bigint(0x300000002)),
-            0);
-  EXPECT_LT(add_compare(bigint(0x1ffffffff), bigint(0x100000002),
-                        bigint(0x300000003)),
-            0);
-}
-
-TEST(bigint_test, shift_left) {
-  bigint n(0x42);
-  n <<= 0;
-  EXPECT_EQ("42", fmt::format("{}", n));
-  n <<= 1;
-  EXPECT_EQ("84", fmt::format("{}", n));
-  n <<= 25;
-  EXPECT_EQ("108000000", fmt::format("{}", n));
-}
-
-TEST(bigint_test, multiply) {
-  bigint n(0x42);
-  EXPECT_THROW(n *= 0, assertion_failure);
-  n *= 1;
-  EXPECT_EQ("42", fmt::format("{}", n));
-  n *= 2;
-  EXPECT_EQ("84", fmt::format("{}", n));
-  n *= 0x12345678;
-  EXPECT_EQ("962fc95e0", fmt::format("{}", n));
-  bigint bigmax(max_value<uint32_t>());
-  bigmax *= max_value<uint32_t>();
-  EXPECT_EQ("fffffffe00000001", fmt::format("{}", bigmax));
-  bigmax.assign(max_value<uint64_t>());
-  bigmax *= max_value<uint64_t>();
-  EXPECT_EQ("fffffffffffffffe0000000000000001", fmt::format("{}", bigmax));
-}
-
-TEST(bigint_test, accumulator) {
-  fmt::detail::accumulator acc;
-  EXPECT_EQ(acc.lower, 0);
-  EXPECT_EQ(acc.upper, 0);
-  acc.upper = 12;
-  acc.lower = 34;
-  EXPECT_EQ(static_cast<uint32_t>(acc), 34);
-  acc += 56;
-  EXPECT_EQ(acc.lower, 90);
-  acc += max_value<uint64_t>();
-  EXPECT_EQ(acc.upper, 13);
-  EXPECT_EQ(acc.lower, 89);
-  acc >>= 32;
-  EXPECT_EQ(acc.upper, 0);
-  EXPECT_EQ(acc.lower, 13 * 0x100000000);
-}
-
-TEST(bigint_test, square) {
-  bigint n0(0);
-  n0.square();
-  EXPECT_EQ("0", fmt::format("{}", n0));
-  bigint n1(0x100);
-  n1.square();
-  EXPECT_EQ("10000", fmt::format("{}", n1));
-  bigint n2(0xfffffffff);
-  n2.square();
-  EXPECT_EQ("ffffffffe000000001", fmt::format("{}", n2));
-  bigint n3(max_value<uint64_t>());
-  n3.square();
-  EXPECT_EQ("fffffffffffffffe0000000000000001", fmt::format("{}", n3));
-  bigint n4;
-  n4.assign_pow10(10);
-  EXPECT_EQ("2540be400", fmt::format("{}", n4));
-}
-
-TEST(bigint_test, divmod_assign_zero_divisor) {
-  bigint zero(0);
-  EXPECT_THROW(bigint(0).divmod_assign(zero), assertion_failure);
-  EXPECT_THROW(bigint(42).divmod_assign(zero), assertion_failure);
-}
-
-TEST(bigint_test, divmod_assign_self) {
-  bigint n(100);
-  EXPECT_THROW(n.divmod_assign(n), assertion_failure);
-}
-
-TEST(bigint_test, divmod_assign_unaligned) {
-  // (42 << 340) / pow(10, 100):
-  bigint n1(42);
-  n1 <<= 340;
-  bigint n2;
-  n2.assign_pow10(100);
-  int result = n1.divmod_assign(n2);
-  EXPECT_EQ(result, 9406);
-  EXPECT_EQ("10f8353019583bfc29ffc8f564e1b9f9d819dbb4cf783e4507eca1539220p96",
-            fmt::format("{}", n1));
-}
-
-TEST(bigint_test, divmod_assign) {
-  // 100 / 10:
-  bigint n1(100);
-  int result = n1.divmod_assign(bigint(10));
-  EXPECT_EQ(result, 10);
-  EXPECT_EQ("0", fmt::format("{}", n1));
-  // pow(10, 100) / (42 << 320):
-  n1.assign_pow10(100);
-  result = n1.divmod_assign(bigint(42) <<= 320);
-  EXPECT_EQ(result, 111);
-  EXPECT_EQ("13ad2594c37ceb0b2784c4ce0bf38ace408e211a7caab24308a82e8f10p96",
-            fmt::format("{}", n1));
-  // 42 / 100:
-  bigint n2(42);
-  n1.assign_pow10(2);
-  result = n2.divmod_assign(n1);
-  EXPECT_EQ(result, 0);
-  EXPECT_EQ("2a", fmt::format("{}", n2));
-}
-
-template <bool is_iec559> void run_double_tests() {
-  fmt::print("warning: double is not IEC559, skipping FP tests\n");
-}
-
-template <> void run_double_tests<true>() {
-  // Construct from double.
-  EXPECT_EQ(fp(1.23), fp(0x13ae147ae147aeu, -52));
-}
-
-TEST(fp_test, double_tests) {
-  run_double_tests<std::numeric_limits<double>::is_iec559>();
-}
-
-TEST(fp_test, normalize) {
-  const auto v = fp(0xbeef, 42);
-  auto normalized = normalize(v);
-  EXPECT_EQ(0xbeef000000000000, normalized.f);
-  EXPECT_EQ(-6, normalized.e);
-}
-
-TEST(fp_test, multiply) {
-  auto v = fp(123ULL << 32, 4) * fp(56ULL << 32, 7);
-  EXPECT_EQ(v.f, 123u * 56u);
-  EXPECT_EQ(v.e, 4 + 7 + 64);
-  v = fp(123ULL << 32, 4) * fp(567ULL << 31, 8);
-  EXPECT_EQ(v.f, (123 * 567 + 1u) / 2);
-  EXPECT_EQ(v.e, 4 + 8 + 64);
-}
-
-TEST(fp_test, get_cached_power) {
-  using limits = std::numeric_limits<double>;
-  for (auto exp = limits::min_exponent; exp <= limits::max_exponent; ++exp) {
-    int dec_exp = 0;
-    auto fp = fmt::detail::get_cached_power(exp, dec_exp);
-    bigint exact, cache(fp.f);
-    if (dec_exp >= 0) {
-      exact.assign_pow10(dec_exp);
-      if (fp.e <= 0)
-        exact <<= -fp.e;
-      else
-        cache <<= fp.e;
-      exact.align(cache);
-      cache.align(exact);
-      auto exact_str = fmt::format("{}", exact);
-      auto cache_str = fmt::format("{}", cache);
-      EXPECT_EQ(exact_str.size(), cache_str.size());
-      EXPECT_EQ(exact_str.substr(0, 15), cache_str.substr(0, 15));
-      int diff = cache_str[15] - exact_str[15];
-      if (diff == 1)
-        EXPECT_GT(exact_str[16], '8');
-      else
-        EXPECT_EQ(diff, 0);
-    } else {
-      cache.assign_pow10(-dec_exp);
-      cache *= fp.f + 1;  // Inexact check.
-      exact.assign(1);
-      exact <<= -fp.e;
-      exact.align(cache);
-      auto exact_str = fmt::format("{}", exact);
-      auto cache_str = fmt::format("{}", cache);
-      EXPECT_EQ(exact_str.size(), cache_str.size());
-      EXPECT_EQ(exact_str.substr(0, 16), cache_str.substr(0, 16));
-    }
-  }
-}
-
-TEST(fp_test, dragonbox_max_k) {
-  using fmt::detail::dragonbox::floor_log10_pow2;
-  using float_info = fmt::detail::dragonbox::float_info<float>;
-  EXPECT_EQ(fmt::detail::const_check(float_info::max_k),
-            float_info::kappa - floor_log10_pow2(float_info::min_exponent -
-                                                 float_info::significand_bits));
-  using double_info = fmt::detail::dragonbox::float_info<double>;
-  EXPECT_EQ(
-      fmt::detail::const_check(double_info::max_k),
-      double_info::kappa - floor_log10_pow2(double_info::min_exponent -
-                                            double_info::significand_bits));
-}
-
-TEST(fp_test, get_round_direction) {
-  using fmt::detail::get_round_direction;
-  using fmt::detail::round_direction;
-  EXPECT_EQ(round_direction::down, get_round_direction(100, 50, 0));
-  EXPECT_EQ(round_direction::up, get_round_direction(100, 51, 0));
-  EXPECT_EQ(round_direction::down, get_round_direction(100, 40, 10));
-  EXPECT_EQ(round_direction::up, get_round_direction(100, 60, 10));
-  for (size_t i = 41; i < 60; ++i)
-    EXPECT_EQ(round_direction::unknown, get_round_direction(100, i, 10));
-  uint64_t max = max_value<uint64_t>();
-  EXPECT_THROW(get_round_direction(100, 100, 0), assertion_failure);
-  EXPECT_THROW(get_round_direction(100, 0, 100), assertion_failure);
-  EXPECT_THROW(get_round_direction(100, 0, 50), assertion_failure);
-  // Check that remainder + error doesn't overflow.
-  EXPECT_EQ(round_direction::up, get_round_direction(max, max - 1, 2));
-  // Check that 2 * (remainder + error) doesn't overflow.
-  EXPECT_EQ(round_direction::unknown,
-            get_round_direction(max, max / 2 + 1, max / 2));
-  // Check that remainder - error doesn't overflow.
-  EXPECT_EQ(round_direction::unknown, get_round_direction(100, 40, 41));
-  // Check that 2 * (remainder - error) doesn't overflow.
-  EXPECT_EQ(round_direction::up, get_round_direction(max, max - 1, 1));
-}
-
-TEST(fp_test, fixed_handler) {
-  struct handler : fmt::detail::gen_digits_handler {
-    char buffer[10];
-    handler(int prec = 0) : fmt::detail::gen_digits_handler() {
-      buf = buffer;
-      precision = prec;
-    }
-  };
-  handler().on_digit('0', 100, 99, 0, false);
-  EXPECT_THROW(handler().on_digit('0', 100, 100, 0, false), assertion_failure);
-  namespace digits = fmt::detail::digits;
-  EXPECT_EQ(handler(1).on_digit('0', 100, 10, 10, false), digits::error);
-  // Check that divisor - error doesn't overflow.
-  EXPECT_EQ(handler(1).on_digit('0', 100, 10, 101, false), digits::error);
-  // Check that 2 * error doesn't overflow.
-  uint64_t max = max_value<uint64_t>();
-  EXPECT_EQ(handler(1).on_digit('0', max, 10, max - 1, false), digits::error);
-}
-
-TEST(fp_test, grisu_format_compiles_with_on_ieee_double) {
-  fmt::memory_buffer buf;
-  format_float(0.42, -1, fmt::detail::float_specs(), buf);
-}
-
-TEST(format_impl_test, format_error_code) {
-  std::string msg = "error 42", sep = ": ";
-  {
-    fmt::memory_buffer buffer;
-    format_to(fmt::appender(buffer), "garbage");
-    fmt::detail::format_error_code(buffer, 42, "test");
-    EXPECT_EQ("test: " + msg, to_string(buffer));
-  }
-  {
-    fmt::memory_buffer buffer;
-    auto prefix =
-        std::string(fmt::inline_buffer_size - msg.size() - sep.size() + 1, 'x');
-    fmt::detail::format_error_code(buffer, 42, prefix);
-    EXPECT_EQ(msg, to_string(buffer));
-  }
-  int codes[] = {42, -1};
-  for (size_t i = 0, n = sizeof(codes) / sizeof(*codes); i < n; ++i) {
-    // Test maximum buffer size.
-    msg = fmt::format("error {}", codes[i]);
-    fmt::memory_buffer buffer;
-    auto prefix =
-        std::string(fmt::inline_buffer_size - msg.size() - sep.size(), 'x');
-    fmt::detail::format_error_code(buffer, codes[i], prefix);
-    EXPECT_EQ(prefix + sep + msg, to_string(buffer));
-    size_t size = fmt::inline_buffer_size;
-    EXPECT_EQ(size, buffer.size());
-    buffer.resize(0);
-    // Test with a message that doesn't fit into the buffer.
-    prefix += 'x';
-    fmt::detail::format_error_code(buffer, codes[i], prefix);
-    EXPECT_EQ(msg, to_string(buffer));
-  }
-}
-
-TEST(format_impl_test, compute_width) {
-  EXPECT_EQ(4,
-            fmt::detail::compute_width(
-                fmt::basic_string_view<fmt::detail::char8_type>(
-                    reinterpret_cast<const fmt::detail::char8_type*>("ёжик"))));
-}
-
-// Tests fmt::detail::count_digits for integer type Int.
-template <typename Int> void test_count_digits() {
-  for (Int i = 0; i < 10; ++i) EXPECT_EQ(1u, fmt::detail::count_digits(i));
-  for (Int i = 1, n = 1, end = max_value<Int>() / 10; n <= end; ++i) {
-    n *= 10;
-    EXPECT_EQ(i, fmt::detail::count_digits(n - 1));
-    EXPECT_EQ(i + 1, fmt::detail::count_digits(n));
-  }
-}
-
-TEST(format_impl_test, count_digits) {
-  test_count_digits<uint32_t>();
-  test_count_digits<uint64_t>();
-}
-
-TEST(format_impl_test, write_fallback_uintptr) {
-  std::string s;
-  fmt::detail::write_ptr<char>(
-      std::back_inserter(s),
-      fmt::detail::fallback_uintptr(reinterpret_cast<void*>(0xface)), nullptr);
-  EXPECT_EQ(s, "0xface");
-}
-
-#ifdef _WIN32
-#  include <windows.h>
-#endif
-
-#ifdef _WIN32
-TEST(format_impl_test, write_console_signature) {
-  decltype(WriteConsoleW)* p = fmt::detail::WriteConsoleW;
-  (void)p;
-}
-#endif
diff --git a/3rdparty/fmt/test/format-test.cc b/3rdparty/fmt/test/format-test.cc
deleted file mode 100644
index a8592ef0..00000000
--- a/3rdparty/fmt/test/format-test.cc
+++ /dev/null
@@ -1,2190 +0,0 @@
-// Formatting library for C++ - formatting library tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-// Check if fmt/format.h compiles with windows.h included before it.
-#ifdef _WIN32
-#  include <windows.h>
-#endif
-// clang-format off
-#include "fmt/format.h"
-// clang-format on
-
-#include <stdint.h>  // uint32_t
-
-#include <climits>      // INT_MAX
-#include <cmath>        // std::signbit
-#include <cstring>      // std::strlen
-#include <iterator>     // std::back_inserter
-#include <list>         // std::list
-#include <memory>       // std::unique_ptr
-#include <type_traits>  // std::is_default_constructible
-
-#include "gtest-extra.h"
-#include "mock-allocator.h"
-#include "util.h"
-
-using fmt::basic_memory_buffer;
-using fmt::format_error;
-using fmt::memory_buffer;
-using fmt::runtime;
-using fmt::string_view;
-using fmt::detail::max_value;
-
-using testing::Return;
-using testing::StrictMock;
-
-enum { buffer_size = 256 };
-
-struct uint32_pair {
-  uint32_t u[2];
-};
-
-TEST(util_test, bit_cast) {
-  auto s = fmt::detail::bit_cast<uint32_pair>(uint64_t{42});
-  EXPECT_EQ(fmt::detail::bit_cast<uint64_t>(s), 42ull);
-  s = fmt::detail::bit_cast<uint32_pair>(~uint64_t{0});
-  EXPECT_EQ(fmt::detail::bit_cast<uint64_t>(s), ~0ull);
-}
-
-// Increment a number in a string.
-void increment(char* s) {
-  for (int i = static_cast<int>(std::strlen(s)) - 1; i >= 0; --i) {
-    if (s[i] != '9') {
-      ++s[i];
-      break;
-    }
-    s[i] = '0';
-  }
-}
-
-TEST(util_test, increment) {
-  char s[10] = "123";
-  increment(s);
-  EXPECT_STREQ("124", s);
-  s[2] = '8';
-  increment(s);
-  EXPECT_STREQ("129", s);
-  increment(s);
-  EXPECT_STREQ("130", s);
-  s[1] = s[2] = '9';
-  increment(s);
-  EXPECT_STREQ("200", s);
-}
-
-TEST(util_test, parse_nonnegative_int) {
-  auto s = fmt::string_view("10000000000");
-  auto begin = s.begin(), end = s.end();
-  EXPECT_EQ(fmt::detail::parse_nonnegative_int(begin, end, -1), -1);
-  s = "2147483649";
-  begin = s.begin();
-  end = s.end();
-  EXPECT_EQ(fmt::detail::parse_nonnegative_int(begin, end, -1), -1);
-}
-
-TEST(util_test, utf8_to_utf16) {
-  auto u = fmt::detail::utf8_to_utf16("лошадка");
-  EXPECT_EQ(L"\x043B\x043E\x0448\x0430\x0434\x043A\x0430", u.str());
-  EXPECT_EQ(7, u.size());
-  // U+10437 { DESERET SMALL LETTER YEE }
-  EXPECT_EQ(L"\xD801\xDC37", fmt::detail::utf8_to_utf16("𐐷").str());
-  EXPECT_THROW_MSG(fmt::detail::utf8_to_utf16("\xc3\x28"), std::runtime_error,
-                   "invalid utf8");
-  EXPECT_THROW_MSG(fmt::detail::utf8_to_utf16(fmt::string_view("л", 1)),
-                   std::runtime_error, "invalid utf8");
-  EXPECT_EQ(L"123456", fmt::detail::utf8_to_utf16("123456").str());
-}
-
-TEST(util_test, utf8_to_utf16_empty_string) {
-  auto s = std::string();
-  auto u = fmt::detail::utf8_to_utf16(s.c_str());
-  EXPECT_EQ(L"", u.str());
-  EXPECT_EQ(s.size(), u.size());
-}
-
-TEST(util_test, allocator_ref) {
-  using test_allocator_ref = allocator_ref<mock_allocator<int>>;
-  auto check_forwarding = [](mock_allocator<int>& alloc,
-                             test_allocator_ref& ref) {
-    int mem;
-    // Check if value_type is properly defined.
-    allocator_ref<mock_allocator<int>>::value_type* ptr = &mem;
-    // Check forwarding.
-    EXPECT_CALL(alloc, allocate(42)).WillOnce(Return(ptr));
-    ref.allocate(42);
-    EXPECT_CALL(alloc, deallocate(ptr, 42));
-    ref.deallocate(ptr, 42);
-  };
-
-  StrictMock<mock_allocator<int>> alloc;
-  auto ref = test_allocator_ref(&alloc);
-  // Check if allocator_ref forwards to the underlying allocator.
-  check_forwarding(alloc, ref);
-  test_allocator_ref ref2(ref);
-  check_forwarding(alloc, ref2);
-  test_allocator_ref ref3;
-  EXPECT_EQ(nullptr, ref3.get());
-  ref3 = ref;
-  check_forwarding(alloc, ref3);
-}
-
-TEST(util_test, format_system_error) {
-  fmt::memory_buffer message;
-  fmt::format_system_error(message, EDOM, "test");
-  auto ec = std::error_code(EDOM, std::generic_category());
-  EXPECT_EQ(to_string(message), std::system_error(ec, "test").what());
-  message = fmt::memory_buffer();
-
-  // Check if std::allocator throws on allocating max size_t / 2 chars.
-  size_t max_size = max_value<size_t>() / 2;
-  bool throws_on_alloc = false;
-  try {
-    auto alloc = std::allocator<char>();
-    alloc.deallocate(alloc.allocate(max_size), max_size);
-  } catch (const std::bad_alloc&) {
-    throws_on_alloc = true;
-  }
-  if (!throws_on_alloc) {
-    fmt::print("warning: std::allocator allocates {} chars", max_size);
-    return;
-  }
-}
-
-TEST(util_test, system_error) {
-  auto test_error = fmt::system_error(EDOM, "test");
-  auto ec = std::error_code(EDOM, std::generic_category());
-  EXPECT_STREQ(test_error.what(), std::system_error(ec, "test").what());
-  EXPECT_EQ(test_error.code(), ec);
-
-  auto error = std::system_error(std::error_code());
-  try {
-    throw fmt::system_error(EDOM, "test {}", "error");
-  } catch (const std::system_error& e) {
-    error = e;
-  }
-  fmt::memory_buffer message;
-  fmt::format_system_error(message, EDOM, "test error");
-  EXPECT_EQ(error.what(), to_string(message));
-  EXPECT_EQ(error.code(), std::error_code(EDOM, std::generic_category()));
-}
-
-TEST(util_test, report_system_error) {
-  fmt::memory_buffer out;
-  fmt::format_system_error(out, EDOM, "test error");
-  out.push_back('\n');
-  EXPECT_WRITE(stderr, fmt::report_system_error(EDOM, "test error"),
-               to_string(out));
-}
-
-TEST(memory_buffer_test, ctor) {
-  basic_memory_buffer<char, 123> buffer;
-  EXPECT_EQ(static_cast<size_t>(0), buffer.size());
-  EXPECT_EQ(123u, buffer.capacity());
-}
-
-using std_allocator = allocator_ref<std::allocator<char>>;
-
-TEST(memory_buffer_test, move_ctor_inline_buffer) {
-  auto check_move_buffer =
-      [](const char* str, basic_memory_buffer<char, 5, std_allocator>& buffer) {
-        std::allocator<char>* alloc = buffer.get_allocator().get();
-        basic_memory_buffer<char, 5, std_allocator> buffer2(std::move(buffer));
-        // Move shouldn't destroy the inline content of the first buffer.
-        EXPECT_EQ(str, std::string(&buffer[0], buffer.size()));
-        EXPECT_EQ(str, std::string(&buffer2[0], buffer2.size()));
-        EXPECT_EQ(5u, buffer2.capacity());
-        // Move should transfer allocator.
-        EXPECT_EQ(nullptr, buffer.get_allocator().get());
-        EXPECT_EQ(alloc, buffer2.get_allocator().get());
-      };
-
-  auto alloc = std::allocator<char>();
-  basic_memory_buffer<char, 5, std_allocator> buffer((std_allocator(&alloc)));
-  const char test[] = "test";
-  buffer.append(string_view(test, 4));
-  check_move_buffer("test", buffer);
-  // Adding one more character fills the inline buffer, but doesn't cause
-  // dynamic allocation.
-  buffer.push_back('a');
-  check_move_buffer("testa", buffer);
-}
-
-TEST(memory_buffer_test, move_ctor_dynamic_buffer) {
-  auto alloc = std::allocator<char>();
-  basic_memory_buffer<char, 4, std_allocator> buffer((std_allocator(&alloc)));
-  const char test[] = "test";
-  buffer.append(test, test + 4);
-  const char* inline_buffer_ptr = &buffer[0];
-  // Adding one more character causes the content to move from the inline to
-  // a dynamically allocated buffer.
-  buffer.push_back('a');
-  basic_memory_buffer<char, 4, std_allocator> buffer2(std::move(buffer));
-  // Move should rip the guts of the first buffer.
-  EXPECT_EQ(inline_buffer_ptr, &buffer[0]);
-  EXPECT_EQ("testa", std::string(&buffer2[0], buffer2.size()));
-  EXPECT_GT(buffer2.capacity(), 4u);
-}
-
-void check_move_assign_buffer(const char* str,
-                              basic_memory_buffer<char, 5>& buffer) {
-  basic_memory_buffer<char, 5> buffer2;
-  buffer2 = std::move(buffer);
-  // Move shouldn't destroy the inline content of the first buffer.
-  EXPECT_EQ(str, std::string(&buffer[0], buffer.size()));
-  EXPECT_EQ(str, std::string(&buffer2[0], buffer2.size()));
-  EXPECT_EQ(5u, buffer2.capacity());
-}
-
-TEST(memory_buffer_test, move_assignment) {
-  basic_memory_buffer<char, 5> buffer;
-  const char test[] = "test";
-  buffer.append(test, test + 4);
-  check_move_assign_buffer("test", buffer);
-  // Adding one more character fills the inline buffer, but doesn't cause
-  // dynamic allocation.
-  buffer.push_back('a');
-  check_move_assign_buffer("testa", buffer);
-  const char* inline_buffer_ptr = &buffer[0];
-  // Adding one more character causes the content to move from the inline to
-  // a dynamically allocated buffer.
-  buffer.push_back('b');
-  basic_memory_buffer<char, 5> buffer2;
-  buffer2 = std::move(buffer);
-  // Move should rip the guts of the first buffer.
-  EXPECT_EQ(inline_buffer_ptr, &buffer[0]);
-  EXPECT_EQ("testab", std::string(&buffer2[0], buffer2.size()));
-  EXPECT_GT(buffer2.capacity(), 5u);
-}
-
-TEST(memory_buffer_test, grow) {
-  typedef allocator_ref<mock_allocator<int>> Allocator;
-  mock_allocator<int> alloc;
-  basic_memory_buffer<int, 10, Allocator> buffer((Allocator(&alloc)));
-  buffer.resize(7);
-  using fmt::detail::to_unsigned;
-  for (int i = 0; i < 7; ++i) buffer[to_unsigned(i)] = i * i;
-  EXPECT_EQ(10u, buffer.capacity());
-  int mem[20];
-  mem[7] = 0xdead;
-  EXPECT_CALL(alloc, allocate(20)).WillOnce(Return(mem));
-  buffer.try_reserve(20);
-  EXPECT_EQ(20u, buffer.capacity());
-  // Check if size elements have been copied
-  for (int i = 0; i < 7; ++i) EXPECT_EQ(i * i, buffer[to_unsigned(i)]);
-  // and no more than that.
-  EXPECT_EQ(0xdead, buffer[7]);
-  EXPECT_CALL(alloc, deallocate(mem, 20));
-}
-
-TEST(memory_buffer_test, allocator) {
-  using test_allocator = allocator_ref<mock_allocator<char>>;
-  basic_memory_buffer<char, 10, test_allocator> buffer;
-  EXPECT_EQ(nullptr, buffer.get_allocator().get());
-  StrictMock<mock_allocator<char>> alloc;
-  char mem;
-  {
-    basic_memory_buffer<char, 10, test_allocator> buffer2(
-        (test_allocator(&alloc)));
-    EXPECT_EQ(&alloc, buffer2.get_allocator().get());
-    size_t size = 2 * fmt::inline_buffer_size;
-    EXPECT_CALL(alloc, allocate(size)).WillOnce(Return(&mem));
-    buffer2.reserve(size);
-    EXPECT_CALL(alloc, deallocate(&mem, size));
-  }
-}
-
-TEST(memory_buffer_test, exception_in_deallocate) {
-  using test_allocator = allocator_ref<mock_allocator<char>>;
-  StrictMock<mock_allocator<char>> alloc;
-  basic_memory_buffer<char, 10, test_allocator> buffer(
-      (test_allocator(&alloc)));
-  size_t size = 2 * fmt::inline_buffer_size;
-  auto mem = std::vector<char>(size);
-  {
-    EXPECT_CALL(alloc, allocate(size)).WillOnce(Return(&mem[0]));
-    buffer.resize(size);
-    std::fill(&buffer[0], &buffer[0] + size, 'x');
-  }
-  auto mem2 = std::vector<char>(2 * size);
-  {
-    EXPECT_CALL(alloc, allocate(2 * size)).WillOnce(Return(&mem2[0]));
-    auto e = std::exception();
-    EXPECT_CALL(alloc, deallocate(&mem[0], size)).WillOnce(testing::Throw(e));
-    EXPECT_THROW(buffer.reserve(2 * size), std::exception);
-    EXPECT_EQ(&mem2[0], &buffer[0]);
-    // Check that the data has been copied.
-    for (size_t i = 0; i < size; ++i) EXPECT_EQ('x', buffer[i]);
-  }
-  EXPECT_CALL(alloc, deallocate(&mem2[0], 2 * size));
-}
-
-template <typename Allocator, size_t MaxSize>
-class max_size_allocator : public Allocator {
- public:
-  using typename Allocator::value_type;
-  size_t max_size() const FMT_NOEXCEPT { return MaxSize; }
-  value_type* allocate(size_t n) {
-    if (n > max_size()) {
-      throw std::length_error("size > max_size");
-    }
-    return std::allocator_traits<Allocator>::allocate(
-        *static_cast<Allocator*>(this), n);
-  }
-  void deallocate(value_type* p, size_t n) {
-    std::allocator_traits<Allocator>::deallocate(*static_cast<Allocator*>(this),
-                                                 p, n);
-  }
-};
-
-TEST(memory_buffer_test, max_size_allocator) {
-  // 160 = 128 + 32
-  using test_allocator = max_size_allocator<std::allocator<char>, 160>;
-  basic_memory_buffer<char, 10, test_allocator> buffer;
-  buffer.resize(128);
-  // new_capacity = 128 + 128/2 = 192 > 160
-  buffer.resize(160);  // Shouldn't throw.
-}
-
-TEST(memory_buffer_test, max_size_allocator_overflow) {
-  using test_allocator = max_size_allocator<std::allocator<char>, 160>;
-  basic_memory_buffer<char, 10, test_allocator> buffer;
-  EXPECT_THROW(buffer.resize(161), std::exception);
-}
-
-TEST(format_test, escape) {
-  EXPECT_EQ("{", fmt::format("{{"));
-  EXPECT_EQ("before {", fmt::format("before {{"));
-  EXPECT_EQ("{ after", fmt::format("{{ after"));
-  EXPECT_EQ("before { after", fmt::format("before {{ after"));
-
-  EXPECT_EQ("}", fmt::format("}}"));
-  EXPECT_EQ("before }", fmt::format("before }}"));
-  EXPECT_EQ("} after", fmt::format("}} after"));
-  EXPECT_EQ("before } after", fmt::format("before }} after"));
-
-  EXPECT_EQ("{}", fmt::format("{{}}"));
-  EXPECT_EQ("{42}", fmt::format("{{{0}}}", 42));
-}
-
-TEST(format_test, unmatched_braces) {
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{")), format_error,
-                   "invalid format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("}")), format_error,
-                   "unmatched '}' in format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0{}")), format_error,
-                   "invalid format string");
-}
-
-TEST(format_test, no_args) { EXPECT_EQ("test", fmt::format("test")); }
-
-TEST(format_test, args_in_different_positions) {
-  EXPECT_EQ("42", fmt::format("{0}", 42));
-  EXPECT_EQ("before 42", fmt::format("before {0}", 42));
-  EXPECT_EQ("42 after", fmt::format("{0} after", 42));
-  EXPECT_EQ("before 42 after", fmt::format("before {0} after", 42));
-  EXPECT_EQ("answer = 42", fmt::format("{0} = {1}", "answer", 42));
-  EXPECT_EQ("42 is the answer", fmt::format("{1} is the {0}", "answer", 42));
-  EXPECT_EQ("abracadabra", fmt::format("{0}{1}{0}", "abra", "cad"));
-}
-
-TEST(format_test, arg_errors) {
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{")), format_error,
-                   "invalid format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{?}")), format_error,
-                   "invalid format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0")), format_error,
-                   "invalid format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0}")), format_error,
-                   "argument not found");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{00}"), 42), format_error,
-                   "invalid format string");
-
-  char format_str[buffer_size];
-  safe_sprintf(format_str, "{%u", INT_MAX);
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str)), format_error,
-                   "invalid format string");
-  safe_sprintf(format_str, "{%u}", INT_MAX);
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str)), format_error,
-                   "argument not found");
-
-  safe_sprintf(format_str, "{%u", INT_MAX + 1u);
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str)), format_error,
-                   "invalid format string");
-  safe_sprintf(format_str, "{%u}", INT_MAX + 1u);
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str)), format_error,
-                   "argument not found");
-}
-
-template <int N> struct test_format {
-  template <typename... T>
-  static std::string format(fmt::string_view fmt, const T&... args) {
-    return test_format<N - 1>::format(fmt, N - 1, args...);
-  }
-};
-
-template <> struct test_format<0> {
-  template <typename... T>
-  static std::string format(fmt::string_view fmt, const T&... args) {
-    return fmt::format(runtime(fmt), args...);
-  }
-};
-
-TEST(format_test, many_args) {
-  EXPECT_EQ("19", test_format<20>::format("{19}"));
-  EXPECT_THROW_MSG(test_format<20>::format("{20}"), format_error,
-                   "argument not found");
-  EXPECT_THROW_MSG(test_format<21>::format("{21}"), format_error,
-                   "argument not found");
-  using fmt::detail::max_packed_args;
-  std::string format_str = fmt::format("{{{}}}", max_packed_args + 1);
-  EXPECT_THROW_MSG(test_format<max_packed_args>::format(format_str),
-                   format_error, "argument not found");
-}
-
-TEST(format_test, named_arg) {
-  EXPECT_EQ("1/a/A", fmt::format("{_1}/{a_}/{A_}", fmt::arg("a_", 'a'),
-                                 fmt::arg("A_", "A"), fmt::arg("_1", 1)));
-  EXPECT_EQ(" -42", fmt::format("{0:{width}}", -42, fmt::arg("width", 4)));
-  EXPECT_EQ("st",
-            fmt::format("{0:.{precision}}", "str", fmt::arg("precision", 2)));
-  EXPECT_EQ("1 2", fmt::format("{} {two}", 1, fmt::arg("two", 2)));
-  EXPECT_EQ("42",
-            fmt::format("{c}", fmt::arg("a", 0), fmt::arg("b", 0),
-                        fmt::arg("c", 42), fmt::arg("d", 0), fmt::arg("e", 0),
-                        fmt::arg("f", 0), fmt::arg("g", 0), fmt::arg("h", 0),
-                        fmt::arg("i", 0), fmt::arg("j", 0), fmt::arg("k", 0),
-                        fmt::arg("l", 0), fmt::arg("m", 0), fmt::arg("n", 0),
-                        fmt::arg("o", 0), fmt::arg("p", 0)));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{a}")), format_error,
-                   "argument not found");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{a}"), 42), format_error,
-                   "argument not found");
-}
-
-TEST(format_test, auto_arg_index) {
-  EXPECT_EQ("abc", fmt::format("{}{}{}", 'a', 'b', 'c'));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0}{}"), 'a', 'b'), format_error,
-                   "cannot switch from manual to automatic argument indexing");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{}{0}"), 'a', 'b'), format_error,
-                   "cannot switch from automatic to manual argument indexing");
-  EXPECT_EQ("1.2", fmt::format("{:.{}}", 1.2345, 2));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0}:.{}"), 1.2345, 2),
-                   format_error,
-                   "cannot switch from manual to automatic argument indexing");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:.{0}}"), 1.2345, 2),
-                   format_error,
-                   "cannot switch from automatic to manual argument indexing");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{}")), format_error,
-                   "argument not found");
-}
-
-TEST(format_test, empty_specs) { EXPECT_EQ("42", fmt::format("{0:}", 42)); }
-
-TEST(format_test, left_align) {
-  EXPECT_EQ("42  ", fmt::format("{0:<4}", 42));
-  EXPECT_EQ("42  ", fmt::format("{0:<4o}", 042));
-  EXPECT_EQ("42  ", fmt::format("{0:<4x}", 0x42));
-  EXPECT_EQ("-42  ", fmt::format("{0:<5}", -42));
-  EXPECT_EQ("42   ", fmt::format("{0:<5}", 42u));
-  EXPECT_EQ("-42  ", fmt::format("{0:<5}", -42l));
-  EXPECT_EQ("42   ", fmt::format("{0:<5}", 42ul));
-  EXPECT_EQ("-42  ", fmt::format("{0:<5}", -42ll));
-  EXPECT_EQ("42   ", fmt::format("{0:<5}", 42ull));
-  EXPECT_EQ("-42  ", fmt::format("{0:<5}", -42.0));
-  EXPECT_EQ("-42  ", fmt::format("{0:<5}", -42.0l));
-  EXPECT_EQ("c    ", fmt::format("{0:<5}", 'c'));
-  EXPECT_EQ("abc  ", fmt::format("{0:<5}", "abc"));
-  EXPECT_EQ("0xface  ", fmt::format("{0:<8}", reinterpret_cast<void*>(0xface)));
-}
-
-TEST(format_test, right_align) {
-  EXPECT_EQ("  42", fmt::format("{0:>4}", 42));
-  EXPECT_EQ("  42", fmt::format("{0:>4o}", 042));
-  EXPECT_EQ("  42", fmt::format("{0:>4x}", 0x42));
-  EXPECT_EQ("  -42", fmt::format("{0:>5}", -42));
-  EXPECT_EQ("   42", fmt::format("{0:>5}", 42u));
-  EXPECT_EQ("  -42", fmt::format("{0:>5}", -42l));
-  EXPECT_EQ("   42", fmt::format("{0:>5}", 42ul));
-  EXPECT_EQ("  -42", fmt::format("{0:>5}", -42ll));
-  EXPECT_EQ("   42", fmt::format("{0:>5}", 42ull));
-  EXPECT_EQ("  -42", fmt::format("{0:>5}", -42.0));
-  EXPECT_EQ("  -42", fmt::format("{0:>5}", -42.0l));
-  EXPECT_EQ("    c", fmt::format("{0:>5}", 'c'));
-  EXPECT_EQ("  abc", fmt::format("{0:>5}", "abc"));
-  EXPECT_EQ("  0xface", fmt::format("{0:>8}", reinterpret_cast<void*>(0xface)));
-}
-
-TEST(format_test, center_align) {
-  EXPECT_EQ(" 42  ", fmt::format("{0:^5}", 42));
-  EXPECT_EQ(" 42  ", fmt::format("{0:^5o}", 042));
-  EXPECT_EQ(" 42  ", fmt::format("{0:^5x}", 0x42));
-  EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42));
-  EXPECT_EQ(" 42  ", fmt::format("{0:^5}", 42u));
-  EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42l));
-  EXPECT_EQ(" 42  ", fmt::format("{0:^5}", 42ul));
-  EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42ll));
-  EXPECT_EQ(" 42  ", fmt::format("{0:^5}", 42ull));
-  EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42.0));
-  EXPECT_EQ(" -42 ", fmt::format("{0:^5}", -42.0l));
-  EXPECT_EQ("  c  ", fmt::format("{0:^5}", 'c'));
-  EXPECT_EQ(" abc  ", fmt::format("{0:^6}", "abc"));
-  EXPECT_EQ(" 0xface ", fmt::format("{0:^8}", reinterpret_cast<void*>(0xface)));
-}
-
-TEST(format_test, fill) {
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{<5}"), 'c'), format_error,
-                   "invalid fill character '{'");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{<5}}"), 'c'), format_error,
-                   "invalid fill character '{'");
-  EXPECT_EQ("**42", fmt::format("{0:*>4}", 42));
-  EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42));
-  EXPECT_EQ("***42", fmt::format("{0:*>5}", 42u));
-  EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42l));
-  EXPECT_EQ("***42", fmt::format("{0:*>5}", 42ul));
-  EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42ll));
-  EXPECT_EQ("***42", fmt::format("{0:*>5}", 42ull));
-  EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42.0));
-  EXPECT_EQ("**-42", fmt::format("{0:*>5}", -42.0l));
-  EXPECT_EQ("c****", fmt::format("{0:*<5}", 'c'));
-  EXPECT_EQ("abc**", fmt::format("{0:*<5}", "abc"));
-  EXPECT_EQ("**0xface",
-            fmt::format("{0:*>8}", reinterpret_cast<void*>(0xface)));
-  EXPECT_EQ("foo=", fmt::format("{:}=", "foo"));
-  EXPECT_EQ(std::string("\0\0\0*", 4),
-            fmt::format(string_view("{:\0>4}", 6), '*'));
-  EXPECT_EQ("жж42", fmt::format("{0:ж>4}", 42));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:\x80\x80\x80\x80\x80>}"), 0),
-                   format_error, "invalid type specifier");
-}
-
-TEST(format_test, plus_sign) {
-  EXPECT_EQ("+42", fmt::format("{0:+}", 42));
-  EXPECT_EQ("-42", fmt::format("{0:+}", -42));
-  EXPECT_EQ("+42", fmt::format("{0:+}", 42));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 42u), format_error,
-                   "format specifier requires signed argument");
-  EXPECT_EQ("+42", fmt::format("{0:+}", 42l));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 42ul), format_error,
-                   "format specifier requires signed argument");
-  EXPECT_EQ("+42", fmt::format("{0:+}", 42ll));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 42ull), format_error,
-                   "format specifier requires signed argument");
-  EXPECT_EQ("+42", fmt::format("{0:+}", 42.0));
-  EXPECT_EQ("+42", fmt::format("{0:+}", 42.0l));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+"), 'c'), format_error,
-                   "missing '}' in format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), 'c'), format_error,
-                   "invalid format specifier for char");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), "abc"), format_error,
-                   "format specifier requires numeric argument");
-  EXPECT_THROW_MSG(
-      (void)fmt::format(runtime("{0:+}"), reinterpret_cast<void*>(0x42)),
-      format_error, "format specifier requires numeric argument");
-}
-
-TEST(format_test, minus_sign) {
-  EXPECT_EQ("42", fmt::format("{0:-}", 42));
-  EXPECT_EQ("-42", fmt::format("{0:-}", -42));
-  EXPECT_EQ("42", fmt::format("{0:-}", 42));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 42u), format_error,
-                   "format specifier requires signed argument");
-  EXPECT_EQ("42", fmt::format("{0:-}", 42l));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 42ul), format_error,
-                   "format specifier requires signed argument");
-  EXPECT_EQ("42", fmt::format("{0:-}", 42ll));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 42ull), format_error,
-                   "format specifier requires signed argument");
-  EXPECT_EQ("42", fmt::format("{0:-}", 42.0));
-  EXPECT_EQ("42", fmt::format("{0:-}", 42.0l));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-"), 'c'), format_error,
-                   "missing '}' in format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), 'c'), format_error,
-                   "invalid format specifier for char");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), "abc"), format_error,
-                   "format specifier requires numeric argument");
-  EXPECT_THROW_MSG(
-      (void)fmt::format(runtime("{0:-}"), reinterpret_cast<void*>(0x42)),
-      format_error, "format specifier requires numeric argument");
-}
-
-TEST(format_test, space_sign) {
-  EXPECT_EQ(" 42", fmt::format("{0: }", 42));
-  EXPECT_EQ("-42", fmt::format("{0: }", -42));
-  EXPECT_EQ(" 42", fmt::format("{0: }", 42));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 42u), format_error,
-                   "format specifier requires signed argument");
-  EXPECT_EQ(" 42", fmt::format("{0: }", 42l));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 42ul), format_error,
-                   "format specifier requires signed argument");
-  EXPECT_EQ(" 42", fmt::format("{0: }", 42ll));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 42ull), format_error,
-                   "format specifier requires signed argument");
-  EXPECT_EQ(" 42", fmt::format("{0: }", 42.0));
-  EXPECT_EQ(" 42", fmt::format("{0: }", 42.0l));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: "), 'c'), format_error,
-                   "missing '}' in format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), 'c'), format_error,
-                   "invalid format specifier for char");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), "abc"), format_error,
-                   "format specifier requires numeric argument");
-  EXPECT_THROW_MSG(
-      (void)fmt::format(runtime("{0: }"), reinterpret_cast<void*>(0x42)),
-      format_error, "format specifier requires numeric argument");
-}
-
-TEST(format_test, hash_flag) {
-  EXPECT_EQ("42", fmt::format("{0:#}", 42));
-  EXPECT_EQ("-42", fmt::format("{0:#}", -42));
-  EXPECT_EQ("0b101010", fmt::format("{0:#b}", 42));
-  EXPECT_EQ("0B101010", fmt::format("{0:#B}", 42));
-  EXPECT_EQ("-0b101010", fmt::format("{0:#b}", -42));
-  EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42));
-  EXPECT_EQ("0X42", fmt::format("{0:#X}", 0x42));
-  EXPECT_EQ("-0x42", fmt::format("{0:#x}", -0x42));
-  EXPECT_EQ("0", fmt::format("{0:#o}", 0));
-  EXPECT_EQ("042", fmt::format("{0:#o}", 042));
-  EXPECT_EQ("-042", fmt::format("{0:#o}", -042));
-  EXPECT_EQ("42", fmt::format("{0:#}", 42u));
-  EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42u));
-  EXPECT_EQ("042", fmt::format("{0:#o}", 042u));
-
-  EXPECT_EQ("-42", fmt::format("{0:#}", -42l));
-  EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42l));
-  EXPECT_EQ("-0x42", fmt::format("{0:#x}", -0x42l));
-  EXPECT_EQ("042", fmt::format("{0:#o}", 042l));
-  EXPECT_EQ("-042", fmt::format("{0:#o}", -042l));
-  EXPECT_EQ("42", fmt::format("{0:#}", 42ul));
-  EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42ul));
-  EXPECT_EQ("042", fmt::format("{0:#o}", 042ul));
-
-  EXPECT_EQ("-42", fmt::format("{0:#}", -42ll));
-  EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42ll));
-  EXPECT_EQ("-0x42", fmt::format("{0:#x}", -0x42ll));
-  EXPECT_EQ("042", fmt::format("{0:#o}", 042ll));
-  EXPECT_EQ("-042", fmt::format("{0:#o}", -042ll));
-  EXPECT_EQ("42", fmt::format("{0:#}", 42ull));
-  EXPECT_EQ("0x42", fmt::format("{0:#x}", 0x42ull));
-  EXPECT_EQ("042", fmt::format("{0:#o}", 042ull));
-
-  EXPECT_EQ("-42.0", fmt::format("{0:#}", -42.0));
-  EXPECT_EQ("-42.0", fmt::format("{0:#}", -42.0l));
-  EXPECT_EQ("4.e+01", fmt::format("{:#.0e}", 42.0));
-  EXPECT_EQ("0.", fmt::format("{:#.0f}", 0.01));
-  EXPECT_EQ("0.50", fmt::format("{:#.2g}", 0.5));
-  EXPECT_EQ("0.", fmt::format("{:#.0f}", 0.5));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:#"), 'c'), format_error,
-                   "missing '}' in format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:#}"), 'c'), format_error,
-                   "invalid format specifier for char");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:#}"), "abc"), format_error,
-                   "format specifier requires numeric argument");
-  EXPECT_THROW_MSG(
-      (void)fmt::format(runtime("{0:#}"), reinterpret_cast<void*>(0x42)),
-      format_error, "format specifier requires numeric argument");
-}
-
-TEST(format_test, zero_flag) {
-  EXPECT_EQ("42", fmt::format("{0:0}", 42));
-  EXPECT_EQ("-0042", fmt::format("{0:05}", -42));
-  EXPECT_EQ("00042", fmt::format("{0:05}", 42u));
-  EXPECT_EQ("-0042", fmt::format("{0:05}", -42l));
-  EXPECT_EQ("00042", fmt::format("{0:05}", 42ul));
-  EXPECT_EQ("-0042", fmt::format("{0:05}", -42ll));
-  EXPECT_EQ("00042", fmt::format("{0:05}", 42ull));
-  EXPECT_EQ("-000042", fmt::format("{0:07}", -42.0));
-  EXPECT_EQ("-000042", fmt::format("{0:07}", -42.0l));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:0"), 'c'), format_error,
-                   "missing '}' in format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:05}"), 'c'), format_error,
-                   "invalid format specifier for char");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:05}"), "abc"), format_error,
-                   "format specifier requires numeric argument");
-  EXPECT_THROW_MSG(
-      (void)fmt::format(runtime("{0:05}"), reinterpret_cast<void*>(0x42)),
-      format_error, "format specifier requires numeric argument");
-}
-
-TEST(format_test, width) {
-  char format_str[buffer_size];
-  safe_sprintf(format_str, "{0:%u", UINT_MAX);
-  increment(format_str + 3);
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "number is too big");
-  size_t size = std::strlen(format_str);
-  format_str[size] = '}';
-  format_str[size + 1] = 0;
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "number is too big");
-
-  safe_sprintf(format_str, "{0:%u", INT_MAX + 1u);
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "number is too big");
-  safe_sprintf(format_str, "{0:%u}", INT_MAX + 1u);
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "number is too big");
-  EXPECT_EQ(" -42", fmt::format("{0:4}", -42));
-  EXPECT_EQ("   42", fmt::format("{0:5}", 42u));
-  EXPECT_EQ("   -42", fmt::format("{0:6}", -42l));
-  EXPECT_EQ("     42", fmt::format("{0:7}", 42ul));
-  EXPECT_EQ("   -42", fmt::format("{0:6}", -42ll));
-  EXPECT_EQ("     42", fmt::format("{0:7}", 42ull));
-  EXPECT_EQ("   -1.23", fmt::format("{0:8}", -1.23));
-  EXPECT_EQ("    -1.23", fmt::format("{0:9}", -1.23l));
-  EXPECT_EQ("    0xcafe",
-            fmt::format("{0:10}", reinterpret_cast<void*>(0xcafe)));
-  EXPECT_EQ("x          ", fmt::format("{0:11}", 'x'));
-  EXPECT_EQ("str         ", fmt::format("{0:12}", "str"));
-  EXPECT_EQ(fmt::format("{:*^6}", "🤡"), "**🤡**");
-  EXPECT_EQ(fmt::format("{:*^8}", "你好"), "**你好**");
-  EXPECT_EQ(fmt::format("{:#6}", 42.0), "  42.0");
-  EXPECT_EQ(fmt::format("{:6c}", static_cast<int>('x')), "x     ");
-  EXPECT_EQ(fmt::format("{:>06.0f}", 0.00884311), "000000");
-}
-
-TEST(format_test, runtime_width) {
-  char format_str[buffer_size];
-  safe_sprintf(format_str, "{0:{%u", UINT_MAX);
-  increment(format_str + 4);
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "invalid format string");
-  size_t size = std::strlen(format_str);
-  format_str[size] = '}';
-  format_str[size + 1] = 0;
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "argument not found");
-  format_str[size + 1] = '}';
-  format_str[size + 2] = 0;
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "argument not found");
-
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{"), 0), format_error,
-                   "invalid format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{}"), 0), format_error,
-                   "cannot switch from manual to automatic argument indexing");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{?}}"), 0), format_error,
-                   "invalid format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0), format_error,
-                   "argument not found");
-
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{0:}}"), 0), format_error,
-                   "invalid format string");
-
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, -1), format_error,
-                   "negative width");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, (INT_MAX + 1u)),
-                   format_error, "number is too big");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, -1l), format_error,
-                   "negative width");
-  if (fmt::detail::const_check(sizeof(long) > sizeof(int))) {
-    long value = INT_MAX;
-    EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, (value + 1)),
-                     format_error, "number is too big");
-  }
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, (INT_MAX + 1ul)),
-                   format_error, "number is too big");
-
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, '0'), format_error,
-                   "width is not integer");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{1}}"), 0, 0.0), format_error,
-                   "width is not integer");
-
-  EXPECT_EQ(" -42", fmt::format("{0:{1}}", -42, 4));
-  EXPECT_EQ("   42", fmt::format("{0:{1}}", 42u, 5));
-  EXPECT_EQ("   -42", fmt::format("{0:{1}}", -42l, 6));
-  EXPECT_EQ("     42", fmt::format("{0:{1}}", 42ul, 7));
-  EXPECT_EQ("   -42", fmt::format("{0:{1}}", -42ll, 6));
-  EXPECT_EQ("     42", fmt::format("{0:{1}}", 42ull, 7));
-  EXPECT_EQ("   -1.23", fmt::format("{0:{1}}", -1.23, 8));
-  EXPECT_EQ("    -1.23", fmt::format("{0:{1}}", -1.23l, 9));
-  EXPECT_EQ("    0xcafe",
-            fmt::format("{0:{1}}", reinterpret_cast<void*>(0xcafe), 10));
-  EXPECT_EQ("x          ", fmt::format("{0:{1}}", 'x', 11));
-  EXPECT_EQ("str         ", fmt::format("{0:{1}}", "str", 12));
-}
-
-TEST(format_test, precision) {
-  char format_str[buffer_size];
-  safe_sprintf(format_str, "{0:.%u", UINT_MAX);
-  increment(format_str + 4);
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "number is too big");
-  size_t size = std::strlen(format_str);
-  format_str[size] = '}';
-  format_str[size + 1] = 0;
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "number is too big");
-
-  safe_sprintf(format_str, "{0:.%u", INT_MAX + 1u);
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "number is too big");
-  safe_sprintf(format_str, "{0:.%u}", INT_MAX + 1u);
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "number is too big");
-
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:."), 0), format_error,
-                   "missing precision specifier");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.}"), 0), format_error,
-                   "missing precision specifier");
-
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2"), 0), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42u), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42u), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42l), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42l), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42ul), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42ul), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42ll), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42ll), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2}"), 42ull), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.2f}"), 42ull), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:3.0}"), 'x'), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_EQ("1.2", fmt::format("{0:.2}", 1.2345));
-  EXPECT_EQ("1.2", fmt::format("{0:.2}", 1.2345l));
-  EXPECT_EQ("1.2e+56", fmt::format("{:.2}", 1.234e56));
-  EXPECT_EQ("1.1", fmt::format("{0:.3}", 1.1));
-  EXPECT_EQ("1e+00", fmt::format("{:.0e}", 1.0L));
-  EXPECT_EQ("  0.0e+00", fmt::format("{:9.1e}", 0.0));
-  EXPECT_EQ(
-      fmt::format("{:.494}", 4.9406564584124654E-324),
-      "4.9406564584124654417656879286822137236505980261432476442558568250067550"
-      "727020875186529983636163599237979656469544571773092665671035593979639877"
-      "479601078187812630071319031140452784581716784898210368871863605699873072"
-      "305000638740915356498438731247339727316961514003171538539807412623856559"
-      "117102665855668676818703956031062493194527159149245532930545654440112748"
-      "012970999954193198940908041656332452475714786901472678015935523861155013"
-      "480352649347201937902681071074917033322268447533357208324319361e-324");
-  EXPECT_EQ(
-      fmt::format("{:.1074f}", 1.1125369292536e-308),
-      "0.0000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000111253692925360019747947051741965785554081512200979"
-      "355021686109411883779182127659725163430929750364498219730822952552570601"
-      "152163505899912777129583674906301179059298598412303893909188340988729019"
-      "014361467448914817838555156840459458527907308695109202499990850735085304"
-      "478476991912072201449236975063640913461919914396877093174125167509869762"
-      "482369631100360266123742648159508919592746619553246586039571522788247697"
-      "156360766271842991667238355464496455107749716934387136380536472531224398"
-      "559833794807213172371254492216255558078524900147957309382830827524104234"
-      "530961756787819847850302379672357738807808384667004752163416921762619527"
-      "462847642037420991432005657440259928195996762610375541867198059294212446"
-      "81962777939941034720757232455434770912461317493580281734466552734375");
-
-  std::string outputs[] = {
-      "-0X1.41FE3FFE71C9E000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000P+127",
-      "-0XA.0FF1FFF38E4F0000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000000000000000000000000"
-      "000000000000000000000000000000000000000000000000000P+124"};
-  EXPECT_THAT(outputs,
-              testing::Contains(fmt::format("{:.838A}", -2.14001164E+38)));
-
-  EXPECT_EQ("123.", fmt::format("{:#.0f}", 123.0));
-  EXPECT_EQ("1.23", fmt::format("{:.02f}", 1.234));
-  EXPECT_EQ("0.001", fmt::format("{:.1g}", 0.001));
-  EXPECT_EQ("1019666400", fmt::format("{}", 1019666432.0f));
-  EXPECT_EQ("1e+01", fmt::format("{:.0e}", 9.5));
-  EXPECT_EQ("1.0e-34", fmt::format("{:.1e}", 1e-34));
-
-  EXPECT_THROW_MSG(
-      (void)fmt::format(runtime("{0:.2}"), reinterpret_cast<void*>(0xcafe)),
-      format_error, "precision not allowed for this argument type");
-  EXPECT_THROW_MSG(
-      (void)fmt::format(runtime("{0:.2f}"), reinterpret_cast<void*>(0xcafe)),
-      format_error, "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:.{}e}"), 42.0,
-                                     fmt::detail::max_value<int>()),
-                   format_error, "number is too big");
-  EXPECT_THROW_MSG(
-      (void)fmt::format("{:.2147483646f}", -2.2121295195081227E+304),
-      format_error, "number is too big");
-
-  EXPECT_EQ("st", fmt::format("{0:.2}", "str"));
-}
-
-TEST(format_test, runtime_precision) {
-  char format_str[buffer_size];
-  safe_sprintf(format_str, "{0:.{%u", UINT_MAX);
-  increment(format_str + 5);
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "invalid format string");
-  size_t size = std::strlen(format_str);
-  format_str[size] = '}';
-  format_str[size + 1] = 0;
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "argument not found");
-  format_str[size + 1] = '}';
-  format_str[size + 2] = 0;
-  EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), 0), format_error,
-                   "argument not found");
-
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{"), 0), format_error,
-                   "invalid format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{}"), 0), format_error,
-                   "cannot switch from manual to automatic argument indexing");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{?}}"), 0), format_error,
-                   "invalid format string");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}"), 0, 0), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0), format_error,
-                   "argument not found");
-
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{0:}}"), 0), format_error,
-                   "invalid format string");
-
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, -1), format_error,
-                   "negative precision");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, (INT_MAX + 1u)),
-                   format_error, "number is too big");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, -1l), format_error,
-                   "negative precision");
-  if (fmt::detail::const_check(sizeof(long) > sizeof(int))) {
-    long value = INT_MAX;
-    EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, (value + 1)),
-                     format_error, "number is too big");
-  }
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, (INT_MAX + 1ul)),
-                   format_error, "number is too big");
-
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, '0'), format_error,
-                   "precision is not integer");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 0, 0.0), format_error,
-                   "precision is not integer");
-
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42, 2), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42, 2), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42u, 2), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42u, 2),
-                   format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42l, 2), format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42l, 2),
-                   format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42ul, 2),
-                   format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42ul, 2),
-                   format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42ll, 2),
-                   format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42ll, 2),
-                   format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"), 42ull, 2),
-                   format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"), 42ull, 2),
-                   format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:3.{1}}"), 'x', 0),
-                   format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_EQ("1.2", fmt::format("{0:.{1}}", 1.2345, 2));
-  EXPECT_EQ("1.2", fmt::format("{1:.{0}}", 2, 1.2345l));
-
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}}"),
-                                     reinterpret_cast<void*>(0xcafe), 2),
-                   format_error,
-                   "precision not allowed for this argument type");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:.{1}f}"),
-                                     reinterpret_cast<void*>(0xcafe), 2),
-                   format_error,
-                   "precision not allowed for this argument type");
-
-  EXPECT_EQ("st", fmt::format("{0:.{1}}", "str", 2));
-}
-
-TEST(format_test, format_bool) {
-  EXPECT_EQ("true", fmt::format("{}", true));
-  EXPECT_EQ("false", fmt::format("{}", false));
-  EXPECT_EQ("1", fmt::format("{:d}", true));
-  EXPECT_EQ("true ", fmt::format("{:5}", true));
-  EXPECT_EQ("true", fmt::format("{:s}", true));
-  EXPECT_EQ("false", fmt::format("{:s}", false));
-  EXPECT_EQ("false ", fmt::format("{:6s}", false));
-}
-
-TEST(format_test, format_short) {
-  short s = 42;
-  EXPECT_EQ("42", fmt::format("{0:d}", s));
-  unsigned short us = 42;
-  EXPECT_EQ("42", fmt::format("{0:d}", us));
-}
-
-template <typename T>
-void check_unknown_types(const T& value, const char* types, const char*) {
-  char format_str[buffer_size];
-  const char* special = ".0123456789L}";
-  for (int i = CHAR_MIN; i <= CHAR_MAX; ++i) {
-    char c = static_cast<char>(i);
-    if (std::strchr(types, c) || std::strchr(special, c) || !c) continue;
-    safe_sprintf(format_str, "{0:10%c}", c);
-    const char* message = "invalid type specifier";
-    EXPECT_THROW_MSG((void)fmt::format(runtime(format_str), value),
-                     format_error, message)
-        << format_str << " " << message;
-  }
-}
-
-TEST(format_test, format_int) {
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:v"), 42), format_error,
-                   "invalid type specifier");
-  check_unknown_types(42, "bBdoxXnLc", "integer");
-  EXPECT_EQ("x", fmt::format("{:c}", static_cast<int>('x')));
-}
-
-TEST(format_test, format_bin) {
-  EXPECT_EQ("0", fmt::format("{0:b}", 0));
-  EXPECT_EQ("101010", fmt::format("{0:b}", 42));
-  EXPECT_EQ("101010", fmt::format("{0:b}", 42u));
-  EXPECT_EQ("-101010", fmt::format("{0:b}", -42));
-  EXPECT_EQ("11000000111001", fmt::format("{0:b}", 12345));
-  EXPECT_EQ("10010001101000101011001111000", fmt::format("{0:b}", 0x12345678));
-  EXPECT_EQ("10010000101010111100110111101111",
-            fmt::format("{0:b}", 0x90ABCDEF));
-  EXPECT_EQ("11111111111111111111111111111111",
-            fmt::format("{0:b}", max_value<uint32_t>()));
-}
-
-#if FMT_USE_INT128
-constexpr auto int128_max = static_cast<__int128_t>(
-    (static_cast<__uint128_t>(1) << ((__SIZEOF_INT128__ * CHAR_BIT) - 1)) - 1);
-constexpr auto int128_min = -int128_max - 1;
-
-constexpr auto uint128_max = ~static_cast<__uint128_t>(0);
-#endif
-
-TEST(format_test, format_dec) {
-  EXPECT_EQ("0", fmt::format("{0}", 0));
-  EXPECT_EQ("42", fmt::format("{0}", 42));
-  EXPECT_EQ("42", fmt::format("{0:d}", 42));
-  EXPECT_EQ("42", fmt::format("{0}", 42u));
-  EXPECT_EQ("-42", fmt::format("{0}", -42));
-  EXPECT_EQ("12345", fmt::format("{0}", 12345));
-  EXPECT_EQ("67890", fmt::format("{0}", 67890));
-#if FMT_USE_INT128
-  EXPECT_EQ("0", fmt::format("{0}", static_cast<__int128_t>(0)));
-  EXPECT_EQ("0", fmt::format("{0}", static_cast<__uint128_t>(0)));
-  EXPECT_EQ("9223372036854775808",
-            fmt::format("{0}", static_cast<__int128_t>(INT64_MAX) + 1));
-  EXPECT_EQ("-9223372036854775809",
-            fmt::format("{0}", static_cast<__int128_t>(INT64_MIN) - 1));
-  EXPECT_EQ("18446744073709551616",
-            fmt::format("{0}", static_cast<__int128_t>(UINT64_MAX) + 1));
-  EXPECT_EQ("170141183460469231731687303715884105727",
-            fmt::format("{0}", int128_max));
-  EXPECT_EQ("-170141183460469231731687303715884105728",
-            fmt::format("{0}", int128_min));
-  EXPECT_EQ("340282366920938463463374607431768211455",
-            fmt::format("{0}", uint128_max));
-#endif
-
-  char buffer[buffer_size];
-  safe_sprintf(buffer, "%d", INT_MIN);
-  EXPECT_EQ(buffer, fmt::format("{0}", INT_MIN));
-  safe_sprintf(buffer, "%d", INT_MAX);
-  EXPECT_EQ(buffer, fmt::format("{0}", INT_MAX));
-  safe_sprintf(buffer, "%u", UINT_MAX);
-  EXPECT_EQ(buffer, fmt::format("{0}", UINT_MAX));
-  safe_sprintf(buffer, "%ld", 0 - static_cast<unsigned long>(LONG_MIN));
-  EXPECT_EQ(buffer, fmt::format("{0}", LONG_MIN));
-  safe_sprintf(buffer, "%ld", LONG_MAX);
-  EXPECT_EQ(buffer, fmt::format("{0}", LONG_MAX));
-  safe_sprintf(buffer, "%lu", ULONG_MAX);
-  EXPECT_EQ(buffer, fmt::format("{0}", ULONG_MAX));
-}
-
-TEST(format_test, format_hex) {
-  EXPECT_EQ("0", fmt::format("{0:x}", 0));
-  EXPECT_EQ("42", fmt::format("{0:x}", 0x42));
-  EXPECT_EQ("42", fmt::format("{0:x}", 0x42u));
-  EXPECT_EQ("-42", fmt::format("{0:x}", -0x42));
-  EXPECT_EQ("12345678", fmt::format("{0:x}", 0x12345678));
-  EXPECT_EQ("90abcdef", fmt::format("{0:x}", 0x90abcdef));
-  EXPECT_EQ("12345678", fmt::format("{0:X}", 0x12345678));
-  EXPECT_EQ("90ABCDEF", fmt::format("{0:X}", 0x90ABCDEF));
-#if FMT_USE_INT128
-  EXPECT_EQ("0", fmt::format("{0:x}", static_cast<__int128_t>(0)));
-  EXPECT_EQ("0", fmt::format("{0:x}", static_cast<__uint128_t>(0)));
-  EXPECT_EQ("8000000000000000",
-            fmt::format("{0:x}", static_cast<__int128_t>(INT64_MAX) + 1));
-  EXPECT_EQ("-8000000000000001",
-            fmt::format("{0:x}", static_cast<__int128_t>(INT64_MIN) - 1));
-  EXPECT_EQ("10000000000000000",
-            fmt::format("{0:x}", static_cast<__int128_t>(UINT64_MAX) + 1));
-  EXPECT_EQ("7fffffffffffffffffffffffffffffff",
-            fmt::format("{0:x}", int128_max));
-  EXPECT_EQ("-80000000000000000000000000000000",
-            fmt::format("{0:x}", int128_min));
-  EXPECT_EQ("ffffffffffffffffffffffffffffffff",
-            fmt::format("{0:x}", uint128_max));
-#endif
-
-  char buffer[buffer_size];
-  safe_sprintf(buffer, "-%x", 0 - static_cast<unsigned>(INT_MIN));
-  EXPECT_EQ(buffer, fmt::format("{0:x}", INT_MIN));
-  safe_sprintf(buffer, "%x", INT_MAX);
-  EXPECT_EQ(buffer, fmt::format("{0:x}", INT_MAX));
-  safe_sprintf(buffer, "%x", UINT_MAX);
-  EXPECT_EQ(buffer, fmt::format("{0:x}", UINT_MAX));
-  safe_sprintf(buffer, "-%lx", 0 - static_cast<unsigned long>(LONG_MIN));
-  EXPECT_EQ(buffer, fmt::format("{0:x}", LONG_MIN));
-  safe_sprintf(buffer, "%lx", LONG_MAX);
-  EXPECT_EQ(buffer, fmt::format("{0:x}", LONG_MAX));
-  safe_sprintf(buffer, "%lx", ULONG_MAX);
-  EXPECT_EQ(buffer, fmt::format("{0:x}", ULONG_MAX));
-}
-
-TEST(format_test, format_oct) {
-  EXPECT_EQ("0", fmt::format("{0:o}", 0));
-  EXPECT_EQ("42", fmt::format("{0:o}", 042));
-  EXPECT_EQ("42", fmt::format("{0:o}", 042u));
-  EXPECT_EQ("-42", fmt::format("{0:o}", -042));
-  EXPECT_EQ("12345670", fmt::format("{0:o}", 012345670));
-#if FMT_USE_INT128
-  EXPECT_EQ("0", fmt::format("{0:o}", static_cast<__int128_t>(0)));
-  EXPECT_EQ("0", fmt::format("{0:o}", static_cast<__uint128_t>(0)));
-  EXPECT_EQ("1000000000000000000000",
-            fmt::format("{0:o}", static_cast<__int128_t>(INT64_MAX) + 1));
-  EXPECT_EQ("-1000000000000000000001",
-            fmt::format("{0:o}", static_cast<__int128_t>(INT64_MIN) - 1));
-  EXPECT_EQ("2000000000000000000000",
-            fmt::format("{0:o}", static_cast<__int128_t>(UINT64_MAX) + 1));
-  EXPECT_EQ("1777777777777777777777777777777777777777777",
-            fmt::format("{0:o}", int128_max));
-  EXPECT_EQ("-2000000000000000000000000000000000000000000",
-            fmt::format("{0:o}", int128_min));
-  EXPECT_EQ("3777777777777777777777777777777777777777777",
-            fmt::format("{0:o}", uint128_max));
-#endif
-
-  char buffer[buffer_size];
-  safe_sprintf(buffer, "-%o", 0 - static_cast<unsigned>(INT_MIN));
-  EXPECT_EQ(buffer, fmt::format("{0:o}", INT_MIN));
-  safe_sprintf(buffer, "%o", INT_MAX);
-  EXPECT_EQ(buffer, fmt::format("{0:o}", INT_MAX));
-  safe_sprintf(buffer, "%o", UINT_MAX);
-  EXPECT_EQ(buffer, fmt::format("{0:o}", UINT_MAX));
-  safe_sprintf(buffer, "-%lo", 0 - static_cast<unsigned long>(LONG_MIN));
-  EXPECT_EQ(buffer, fmt::format("{0:o}", LONG_MIN));
-  safe_sprintf(buffer, "%lo", LONG_MAX);
-  EXPECT_EQ(buffer, fmt::format("{0:o}", LONG_MAX));
-  safe_sprintf(buffer, "%lo", ULONG_MAX);
-  EXPECT_EQ(buffer, fmt::format("{0:o}", ULONG_MAX));
-}
-
-TEST(format_test, format_int_locale) {
-  EXPECT_EQ("1234", fmt::format("{:L}", 1234));
-}
-
-TEST(format_test, format_float) {
-  EXPECT_EQ("0", fmt::format("{}", 0.0f));
-  EXPECT_EQ("392.500000", fmt::format("{0:f}", 392.5f));
-}
-
-TEST(format_test, format_double) {
-  EXPECT_EQ("0", fmt::format("{}", 0.0));
-  check_unknown_types(1.2, "eEfFgGaAnL%", "double");
-  EXPECT_EQ("0", fmt::format("{:}", 0.0));
-  EXPECT_EQ("0.000000", fmt::format("{:f}", 0.0));
-  EXPECT_EQ("0", fmt::format("{:g}", 0.0));
-  EXPECT_EQ("392.65", fmt::format("{:}", 392.65));
-  EXPECT_EQ("392.65", fmt::format("{:g}", 392.65));
-  EXPECT_EQ("392.65", fmt::format("{:G}", 392.65));
-  EXPECT_EQ("4.9014e+06", fmt::format("{:g}", 4.9014e6));
-  EXPECT_EQ("392.650000", fmt::format("{:f}", 392.65));
-  EXPECT_EQ("392.650000", fmt::format("{:F}", 392.65));
-  EXPECT_EQ("42", fmt::format("{:L}", 42.0));
-  EXPECT_EQ("    0x1.0cccccccccccdp+2", fmt::format("{:24a}", 4.2));
-  EXPECT_EQ("0x1.0cccccccccccdp+2    ", fmt::format("{:<24a}", 4.2));
-  char buffer[buffer_size];
-  safe_sprintf(buffer, "%e", 392.65);
-  EXPECT_EQ(buffer, fmt::format("{0:e}", 392.65));
-  safe_sprintf(buffer, "%E", 392.65);
-  EXPECT_EQ(buffer, fmt::format("{0:E}", 392.65));
-  EXPECT_EQ("+0000392.6", fmt::format("{0:+010.4g}", 392.65));
-  safe_sprintf(buffer, "%a", -42.0);
-  EXPECT_EQ(buffer, fmt::format("{:a}", -42.0));
-  safe_sprintf(buffer, "%A", -42.0);
-  EXPECT_EQ(buffer, fmt::format("{:A}", -42.0));
-  EXPECT_EQ("9223372036854775808.000000",
-            fmt::format("{:f}", 9223372036854775807.0));
-}
-
-TEST(format_test, precision_rounding) {
-  EXPECT_EQ("0", fmt::format("{:.0f}", 0.0));
-  EXPECT_EQ("0", fmt::format("{:.0f}", 0.01));
-  EXPECT_EQ("0", fmt::format("{:.0f}", 0.1));
-  EXPECT_EQ("0.000", fmt::format("{:.3f}", 0.00049));
-  EXPECT_EQ("0.001", fmt::format("{:.3f}", 0.0005));
-  EXPECT_EQ("0.001", fmt::format("{:.3f}", 0.00149));
-  EXPECT_EQ("0.002", fmt::format("{:.3f}", 0.0015));
-  EXPECT_EQ("1.000", fmt::format("{:.3f}", 0.9999));
-  EXPECT_EQ("0.00123", fmt::format("{:.3}", 0.00123));
-  EXPECT_EQ("0.1", fmt::format("{:.16g}", 0.1));
-  EXPECT_EQ("1", fmt::format("{:.0}", 1.0));
-  EXPECT_EQ("225.51575035152063720",
-            fmt::format("{:.17f}", 225.51575035152064));
-  EXPECT_EQ("-761519619559038.2", fmt::format("{:.1f}", -761519619559038.2));
-  EXPECT_EQ("1.9156918820264798e-56",
-            fmt::format("{}", 1.9156918820264798e-56));
-  EXPECT_EQ("0.0000", fmt::format("{:.4f}", 7.2809479766055470e-15));
-
-  // Trigger a rounding error in Grisu by a specially chosen number.
-  EXPECT_EQ("3788512123356.985352", fmt::format("{:f}", 3788512123356.985352));
-}
-
-TEST(format_test, prettify_float) {
-  EXPECT_EQ("0.0001", fmt::format("{}", 1e-4));
-  EXPECT_EQ("1e-05", fmt::format("{}", 1e-5));
-  EXPECT_EQ("1000000000000000", fmt::format("{}", 1e15));
-  EXPECT_EQ("1e+16", fmt::format("{}", 1e16));
-  EXPECT_EQ("9.999e-05", fmt::format("{}", 9.999e-5));
-  EXPECT_EQ("10000000000", fmt::format("{}", 1e10));
-  EXPECT_EQ("100000000000", fmt::format("{}", 1e11));
-  EXPECT_EQ("12340000000", fmt::format("{}", 1234e7));
-  EXPECT_EQ("12.34", fmt::format("{}", 1234e-2));
-  EXPECT_EQ("0.001234", fmt::format("{}", 1234e-6));
-  EXPECT_EQ("0.1", fmt::format("{}", 0.1f));
-  EXPECT_EQ("0.10000000149011612", fmt::format("{}", double(0.1f)));
-  EXPECT_EQ("1.3563156e-19", fmt::format("{}", 1.35631564e-19f));
-}
-
-TEST(format_test, format_nan) {
-  double nan = std::numeric_limits<double>::quiet_NaN();
-  EXPECT_EQ("nan", fmt::format("{}", nan));
-  EXPECT_EQ("+nan", fmt::format("{:+}", nan));
-  EXPECT_EQ("  +nan", fmt::format("{:+06}", nan));
-  EXPECT_EQ("+nan  ", fmt::format("{:<+06}", nan));
-  EXPECT_EQ(" +nan ", fmt::format("{:^+06}", nan));
-  EXPECT_EQ("  +nan", fmt::format("{:>+06}", nan));
-  if (std::signbit(-nan)) {
-    EXPECT_EQ("-nan", fmt::format("{}", -nan));
-    EXPECT_EQ("  -nan", fmt::format("{:+06}", -nan));
-  } else {
-    fmt::print("Warning: compiler doesn't handle negative NaN correctly");
-  }
-  EXPECT_EQ(" nan", fmt::format("{: }", nan));
-  EXPECT_EQ("NAN", fmt::format("{:F}", nan));
-  EXPECT_EQ("nan    ", fmt::format("{:<7}", nan));
-  EXPECT_EQ("  nan  ", fmt::format("{:^7}", nan));
-  EXPECT_EQ("    nan", fmt::format("{:>7}", nan));
-}
-
-TEST(format_test, format_infinity) {
-  double inf = std::numeric_limits<double>::infinity();
-  EXPECT_EQ("inf", fmt::format("{}", inf));
-  EXPECT_EQ("+inf", fmt::format("{:+}", inf));
-  EXPECT_EQ("-inf", fmt::format("{}", -inf));
-  EXPECT_EQ("  +inf", fmt::format("{:+06}", inf));
-  EXPECT_EQ("  -inf", fmt::format("{:+06}", -inf));
-  EXPECT_EQ("+inf  ", fmt::format("{:<+06}", inf));
-  EXPECT_EQ(" +inf ", fmt::format("{:^+06}", inf));
-  EXPECT_EQ("  +inf", fmt::format("{:>+06}", inf));
-  EXPECT_EQ(" inf", fmt::format("{: }", inf));
-  EXPECT_EQ("INF", fmt::format("{:F}", inf));
-  EXPECT_EQ("inf    ", fmt::format("{:<7}", inf));
-  EXPECT_EQ("  inf  ", fmt::format("{:^7}", inf));
-  EXPECT_EQ("    inf", fmt::format("{:>7}", inf));
-}
-
-TEST(format_test, format_long_double) {
-  EXPECT_EQ("0", fmt::format("{0:}", 0.0l));
-  EXPECT_EQ("0.000000", fmt::format("{0:f}", 0.0l));
-  EXPECT_EQ("392.65", fmt::format("{0:}", 392.65l));
-  EXPECT_EQ("392.65", fmt::format("{0:g}", 392.65l));
-  EXPECT_EQ("392.65", fmt::format("{0:G}", 392.65l));
-  EXPECT_EQ("392.650000", fmt::format("{0:f}", 392.65l));
-  EXPECT_EQ("392.650000", fmt::format("{0:F}", 392.65l));
-  char buffer[buffer_size];
-  safe_sprintf(buffer, "%Le", 392.65l);
-  EXPECT_EQ(buffer, fmt::format("{0:e}", 392.65l));
-  EXPECT_EQ("+0000392.6", fmt::format("{0:+010.4g}", 392.64l));
-  safe_sprintf(buffer, "%La", 3.31l);
-  EXPECT_EQ(buffer, fmt::format("{:a}", 3.31l));
-}
-
-TEST(format_test, format_char) {
-  const char types[] = "cbBdoxX";
-  check_unknown_types('a', types, "char");
-  EXPECT_EQ("a", fmt::format("{0}", 'a'));
-  EXPECT_EQ("z", fmt::format("{0:c}", 'z'));
-  int n = 'x';
-  for (const char* type = types + 1; *type; ++type) {
-    std::string format_str = fmt::format("{{:{}}}", *type);
-    EXPECT_EQ(fmt::format(runtime(format_str), n),
-              fmt::format(runtime(format_str), 'x'))
-        << format_str;
-  }
-  EXPECT_EQ(fmt::format("{:02X}", n), fmt::format("{:02X}", 'x'));
-}
-
-TEST(format_test, format_volatile_char) {
-  volatile char c = 'x';
-  EXPECT_EQ("x", fmt::format("{}", c));
-}
-
-TEST(format_test, format_unsigned_char) {
-  EXPECT_EQ("42", fmt::format("{}", static_cast<unsigned char>(42)));
-  EXPECT_EQ("42", fmt::format("{}", static_cast<uint8_t>(42)));
-}
-
-TEST(format_test, format_cstring) {
-  check_unknown_types("test", "sp", "string");
-  EXPECT_EQ("test", fmt::format("{0}", "test"));
-  EXPECT_EQ("test", fmt::format("{0:s}", "test"));
-  char nonconst[] = "nonconst";
-  EXPECT_EQ("nonconst", fmt::format("{0}", nonconst));
-  EXPECT_THROW_MSG(
-      (void)fmt::format(runtime("{0}"), static_cast<const char*>(nullptr)),
-      format_error, "string pointer is null");
-}
-
-void function_pointer_test(int, double, std::string) {}
-
-TEST(format_test, format_pointer) {
-  check_unknown_types(reinterpret_cast<void*>(0x1234), "p", "pointer");
-  EXPECT_EQ("0x0", fmt::format("{0}", static_cast<void*>(nullptr)));
-  EXPECT_EQ("0x1234", fmt::format("{0}", reinterpret_cast<void*>(0x1234)));
-  EXPECT_EQ("0x1234", fmt::format("{0:p}", reinterpret_cast<void*>(0x1234)));
-  EXPECT_EQ("0x" + std::string(sizeof(void*) * CHAR_BIT / 4, 'f'),
-            fmt::format("{0}", reinterpret_cast<void*>(~uintptr_t())));
-  EXPECT_EQ("0x1234",
-            fmt::format("{}", fmt::ptr(reinterpret_cast<int*>(0x1234))));
-  std::unique_ptr<int> up(new int(1));
-  EXPECT_EQ(fmt::format("{}", fmt::ptr(up.get())),
-            fmt::format("{}", fmt::ptr(up)));
-  std::shared_ptr<int> sp(new int(1));
-  EXPECT_EQ(fmt::format("{}", fmt::ptr(sp.get())),
-            fmt::format("{}", fmt::ptr(sp)));
-  EXPECT_EQ(fmt::format("{}", fmt::detail::bit_cast<const void*>(
-                                  &function_pointer_test)),
-            fmt::format("{}", fmt::ptr(function_pointer_test)));
-  EXPECT_EQ("0x0", fmt::format("{}", nullptr));
-}
-
-TEST(format_test, format_string) {
-  EXPECT_EQ("test", fmt::format("{0}", std::string("test")));
-  EXPECT_THROW((void)fmt::format(fmt::runtime("{:x}"), std::string("test")),
-               fmt::format_error);
-}
-
-TEST(format_test, format_string_view) {
-  EXPECT_EQ("test", fmt::format("{}", string_view("test")));
-  EXPECT_EQ("", fmt::format("{}", string_view()));
-}
-
-#ifdef FMT_USE_STRING_VIEW
-struct string_viewable {};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<string_viewable> : formatter<std::string_view> {
-  auto format(string_viewable, format_context& ctx) -> decltype(ctx.out()) {
-    return formatter<std::string_view>::format("foo", ctx);
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(format_test, format_std_string_view) {
-  EXPECT_EQ("test", fmt::format("{}", std::string_view("test")));
-  EXPECT_EQ("foo", fmt::format("{}", string_viewable()));
-}
-
-struct explicitly_convertible_to_std_string_view {
-  explicit operator std::string_view() const { return "foo"; }
-};
-
-template <>
-struct fmt::formatter<explicitly_convertible_to_std_string_view>
-    : formatter<std::string_view> {
-  auto format(explicitly_convertible_to_std_string_view v, format_context& ctx)
-      -> decltype(ctx.out()) {
-    return format_to(ctx.out(), "'{}'", std::string_view(v));
-  }
-};
-
-TEST(format_test, format_explicitly_convertible_to_std_string_view) {
-  EXPECT_EQ("'foo'",
-            fmt::format("{}", explicitly_convertible_to_std_string_view()));
-}
-#endif
-
-struct converible_to_anything {
-  template <typename T> operator T() const { return T(); }
-};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<converible_to_anything> {
-  FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  auto format(converible_to_anything, format_context& ctx)
-      -> decltype(ctx.out()) {
-    return format_to(ctx.out(), "foo");
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(format_test, format_convertible_to_anything) {
-  EXPECT_EQ("foo", fmt::format("{}", converible_to_anything()));
-}
-
-class Answer {};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<date> {
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    auto it = ctx.begin();
-    if (it != ctx.end() && *it == 'd') ++it;
-    return it;
-  }
-
-  auto format(const date& d, format_context& ctx) -> decltype(ctx.out()) {
-    format_to(ctx.out(), "{}-{}-{}", d.year(), d.month(), d.day());
-    return ctx.out();
-  }
-};
-
-template <> struct formatter<Answer> : formatter<int> {
-  template <typename FormatContext>
-  auto format(Answer, FormatContext& ctx) -> decltype(ctx.out()) {
-    return formatter<int>::format(42, ctx);
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(format_test, format_custom) {
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:s}"), date(2012, 12, 9)),
-                   format_error, "unknown format specifier");
-  EXPECT_EQ("42", fmt::format("{0}", Answer()));
-  EXPECT_EQ("0042", fmt::format("{:04}", Answer()));
-}
-
-TEST(format_test, format_to_custom) {
-  char buf[10] = {};
-  auto end =
-      &*fmt::format_to(fmt::detail::make_checked(buf, 10), "{}", Answer());
-  EXPECT_EQ(end, buf + 2);
-  EXPECT_STREQ(buf, "42");
-}
-
-TEST(format_test, format_string_from_speed_test) {
-  EXPECT_EQ("1.2340000000:0042:+3.13:str:0x3e8:X:%",
-            fmt::format("{0:0.10f}:{1:04}:{2:+g}:{3}:{4}:{5}:%", 1.234, 42,
-                        3.13, "str", reinterpret_cast<void*>(1000), 'X'));
-}
-
-TEST(format_test, format_examples) {
-  std::string message = fmt::format("The answer is {}", 42);
-  EXPECT_EQ("The answer is 42", message);
-
-  EXPECT_EQ("42", fmt::format("{}", 42));
-
-  memory_buffer out;
-  format_to(std::back_inserter(out), "The answer is {}.", 42);
-  EXPECT_EQ("The answer is 42.", to_string(out));
-
-  const char* filename = "nonexistent";
-  FILE* ftest = safe_fopen(filename, "r");
-  if (ftest) fclose(ftest);
-  int error_code = errno;
-  EXPECT_TRUE(ftest == nullptr);
-  EXPECT_SYSTEM_ERROR(
-      {
-        FILE* f = safe_fopen(filename, "r");
-        if (!f)
-          throw fmt::system_error(errno, "Cannot open file '{}'", filename);
-        fclose(f);
-      },
-      error_code, "Cannot open file 'nonexistent'");
-
-  EXPECT_EQ("First, thou shalt count to three",
-            fmt::format("First, thou shalt count to {0}", "three"));
-  EXPECT_EQ("Bring me a shrubbery", fmt::format("Bring me a {}", "shrubbery"));
-  EXPECT_EQ("From 1 to 3", fmt::format("From {} to {}", 1, 3));
-
-  char buffer[buffer_size];
-  safe_sprintf(buffer, "%03.2f", -1.2);
-  EXPECT_EQ(buffer, fmt::format("{:03.2f}", -1.2));
-
-  EXPECT_EQ("a, b, c", fmt::format("{0}, {1}, {2}", 'a', 'b', 'c'));
-  EXPECT_EQ("a, b, c", fmt::format("{}, {}, {}", 'a', 'b', 'c'));
-  EXPECT_EQ("c, b, a", fmt::format("{2}, {1}, {0}", 'a', 'b', 'c'));
-  EXPECT_EQ("abracadabra", fmt::format("{0}{1}{0}", "abra", "cad"));
-
-  EXPECT_EQ("left aligned                  ",
-            fmt::format("{:<30}", "left aligned"));
-  EXPECT_EQ("                 right aligned",
-            fmt::format("{:>30}", "right aligned"));
-  EXPECT_EQ("           centered           ",
-            fmt::format("{:^30}", "centered"));
-  EXPECT_EQ("***********centered***********",
-            fmt::format("{:*^30}", "centered"));
-
-  EXPECT_EQ("+3.140000; -3.140000", fmt::format("{:+f}; {:+f}", 3.14, -3.14));
-  EXPECT_EQ(" 3.140000; -3.140000", fmt::format("{: f}; {: f}", 3.14, -3.14));
-  EXPECT_EQ("3.140000; -3.140000", fmt::format("{:-f}; {:-f}", 3.14, -3.14));
-
-  EXPECT_EQ("int: 42;  hex: 2a;  oct: 52",
-            fmt::format("int: {0:d};  hex: {0:x};  oct: {0:o}", 42));
-  EXPECT_EQ("int: 42;  hex: 0x2a;  oct: 052",
-            fmt::format("int: {0:d};  hex: {0:#x};  oct: {0:#o}", 42));
-
-  EXPECT_EQ("The answer is 42", fmt::format("The answer is {}", 42));
-  EXPECT_THROW_MSG(
-      (void)fmt::format(runtime("The answer is {:d}"), "forty-two"),
-      format_error, "invalid type specifier");
-
-  EXPECT_WRITE(
-      stdout, fmt::print("{}", std::numeric_limits<double>::infinity()), "inf");
-}
-
-TEST(format_test, print) {
-  EXPECT_WRITE(stdout, fmt::print("Don't {}!", "panic"), "Don't panic!");
-  EXPECT_WRITE(stderr, fmt::print(stderr, "Don't {}!", "panic"),
-               "Don't panic!");
-}
-
-TEST(format_test, variadic) {
-  EXPECT_EQ("abc1", fmt::format("{}c{}", "ab", 1));
-}
-
-TEST(format_test, dynamic) {
-  using ctx = fmt::format_context;
-  auto args = std::vector<fmt::basic_format_arg<ctx>>();
-  args.emplace_back(fmt::detail::make_arg<ctx>(42));
-  args.emplace_back(fmt::detail::make_arg<ctx>("abc1"));
-  args.emplace_back(fmt::detail::make_arg<ctx>(1.5f));
-
-  std::string result = fmt::vformat(
-      "{} and {} and {}",
-      fmt::format_args(args.data(), static_cast<int>(args.size())));
-
-  EXPECT_EQ("42 and abc1 and 1.5", result);
-}
-
-TEST(format_test, bytes) {
-  auto s = fmt::format("{:10}", fmt::bytes("ёжик"));
-  EXPECT_EQ("ёжик  ", s);
-  EXPECT_EQ(10, s.size());
-}
-
-TEST(format_test, group_digits_view) {
-  EXPECT_EQ(fmt::format("{}", fmt::group_digits(10000000)), "10,000,000");
-  EXPECT_EQ(fmt::format("{:8}", fmt::group_digits(1000)), "   1,000");
-}
-
-enum test_enum { foo, bar };
-
-TEST(format_test, join) {
-  using fmt::join;
-  int v1[3] = {1, 2, 3};
-  auto v2 = std::vector<float>();
-  v2.push_back(1.2f);
-  v2.push_back(3.4f);
-  void* v3[2] = {&v1[0], &v1[1]};
-
-  EXPECT_EQ("(1, 2, 3)", fmt::format("({})", join(v1, v1 + 3, ", ")));
-  EXPECT_EQ("(1)", fmt::format("({})", join(v1, v1 + 1, ", ")));
-  EXPECT_EQ("()", fmt::format("({})", join(v1, v1, ", ")));
-  EXPECT_EQ("(001, 002, 003)", fmt::format("({:03})", join(v1, v1 + 3, ", ")));
-  EXPECT_EQ("(+01.20, +03.40)",
-            fmt::format("({:+06.2f})", join(v2.begin(), v2.end(), ", ")));
-
-  EXPECT_EQ("1, 2, 3", fmt::format("{0:{1}}", join(v1, v1 + 3, ", "), 1));
-
-  EXPECT_EQ(fmt::format("{}, {}", v3[0], v3[1]),
-            fmt::format("{}", join(v3, v3 + 2, ", ")));
-
-  EXPECT_EQ("(1, 2, 3)", fmt::format("({})", join(v1, ", ")));
-  EXPECT_EQ("(+01.20, +03.40)", fmt::format("({:+06.2f})", join(v2, ", ")));
-
-  auto v4 = std::vector<test_enum>{foo, bar, foo};
-  EXPECT_EQ("0 1 0", fmt::format("{}", join(v4, " ")));
-}
-
-#ifdef __cpp_lib_byte
-TEST(format_test, join_bytes) {
-  auto v = std::vector<std::byte>{std::byte(1), std::byte(2), std::byte(3)};
-  EXPECT_EQ("1, 2, 3", fmt::format("{}", fmt::join(v, ", ")));
-}
-#endif
-
-std::string vformat_message(int id, const char* format, fmt::format_args args) {
-  auto buffer = fmt::memory_buffer();
-  format_to(fmt::appender(buffer), "[{}] ", id);
-  vformat_to(fmt::appender(buffer), format, args);
-  return to_string(buffer);
-}
-
-template <typename... Args>
-std::string format_message(int id, const char* format, const Args&... args) {
-  auto va = fmt::make_format_args(args...);
-  return vformat_message(id, format, va);
-}
-
-TEST(format_test, format_message_example) {
-  EXPECT_EQ("[42] something happened",
-            format_message(42, "{} happened", "something"));
-}
-
-template <typename... Args>
-void print_error(const char* file, int line, const char* format,
-                 const Args&... args) {
-  fmt::print("{}: {}: ", file, line);
-  fmt::print(format, args...);
-}
-
-TEST(format_test, unpacked_args) {
-  EXPECT_EQ("0123456789abcdefg",
-            fmt::format("{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}", 0, 1, 2, 3, 4, 5,
-                        6, 7, 8, 9, 'a', 'b', 'c', 'd', 'e', 'f', 'g'));
-}
-
-struct string_like {};
-fmt::string_view to_string_view(string_like) { return "foo"; }
-
-constexpr char with_null[3] = {'{', '}', '\0'};
-constexpr char no_null[2] = {'{', '}'};
-static FMT_CONSTEXPR_DECL const char static_with_null[3] = {'{', '}', '\0'};
-static FMT_CONSTEXPR_DECL const char static_no_null[2] = {'{', '}'};
-
-TEST(format_test, compile_time_string) {
-  EXPECT_EQ("foo", fmt::format(FMT_STRING("foo")));
-  EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), 42));
-  EXPECT_EQ("foo", fmt::format(FMT_STRING("{}"), string_like()));
-
-#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-  using namespace fmt::literals;
-  EXPECT_EQ("foobar", fmt::format(FMT_STRING("{foo}{bar}"), "bar"_a = "bar",
-                                  "foo"_a = "foo"));
-  EXPECT_EQ("", fmt::format(FMT_STRING("")));
-  EXPECT_EQ("", fmt::format(FMT_STRING(""), "arg"_a = 42));
-#endif
-
-  (void)static_with_null;
-  (void)static_no_null;
-#ifndef _MSC_VER
-  EXPECT_EQ("42", fmt::format(FMT_STRING(static_with_null), 42));
-  EXPECT_EQ("42", fmt::format(FMT_STRING(static_no_null), 42));
-#endif
-
-  (void)with_null;
-  (void)no_null;
-#if __cplusplus >= 201703L
-  EXPECT_EQ("42", fmt::format(FMT_STRING(with_null), 42));
-  EXPECT_EQ("42", fmt::format(FMT_STRING(no_null), 42));
-#endif
-#if defined(FMT_USE_STRING_VIEW) && __cplusplus >= 201703L
-  EXPECT_EQ("42", fmt::format(FMT_STRING(std::string_view("{}")), 42));
-#endif
-}
-
-TEST(format_test, custom_format_compile_time_string) {
-  EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), Answer()));
-  auto answer = Answer();
-  EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), answer));
-  char buf[10] = {};
-  fmt::format_to(buf, FMT_STRING("{}"), answer);
-  const Answer const_answer = Answer();
-  EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), const_answer));
-}
-
-#if FMT_USE_USER_DEFINED_LITERALS
-// Passing user-defined literals directly to EXPECT_EQ causes problems
-// with macro argument stringification (#) on some versions of GCC.
-// Workaround: Assing the UDL result to a variable before the macro.
-
-using namespace fmt::literals;
-
-#  if FMT_GCC_VERSION
-#    define FMT_CHECK_DEPRECATED_UDL_FORMAT 1
-#  elif FMT_CLANG_VERSION && defined(__has_warning)
-#    if __has_warning("-Wdeprecated-declarations")
-#      define FMT_CHECK_DEPRECATED_UDL_FORMAT 1
-#    endif
-#  endif
-#  ifndef FMT_CHECK_DEPRECATED_UDL_FORMAT
-#    define FMT_CHECK_DEPRECATED_UDL_FORMAT 0
-#  endif
-
-#  if FMT_CHECK_DEPRECATED_UDL_FORMAT
-#    pragma GCC diagnostic push
-#    pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-
-TEST(format_test, format_udl) {
-  EXPECT_EQ("{}c{}"_format("ab", 1), fmt::format("{}c{}", "ab", 1));
-  EXPECT_EQ("foo"_format(), "foo");
-  EXPECT_EQ("{0:10}"_format(42), "        42");
-  EXPECT_EQ("{}"_format(date(2015, 10, 21)), "2015-10-21");
-}
-
-#    pragma GCC diagnostic pop
-#  endif
-
-TEST(format_test, named_arg_udl) {
-  auto udl_a = fmt::format("{first}{second}{first}{third}", "first"_a = "abra",
-                           "second"_a = "cad", "third"_a = 99);
-  EXPECT_EQ(
-      fmt::format("{first}{second}{first}{third}", fmt::arg("first", "abra"),
-                  fmt::arg("second", "cad"), fmt::arg("third", 99)),
-      udl_a);
-}
-#endif  // FMT_USE_USER_DEFINED_LITERALS
-
-TEST(format_test, enum) { EXPECT_EQ("0", fmt::format("{}", foo)); }
-
-TEST(format_test, formatter_not_specialized) {
-  static_assert(!fmt::has_formatter<fmt::formatter<test_enum>,
-                                    fmt::format_context>::value,
-                "");
-}
-
-#if FMT_HAS_FEATURE(cxx_strong_enums)
-enum big_enum : unsigned long long { big_enum_value = 5000000000ULL };
-
-TEST(format_test, strong_enum) {
-  EXPECT_EQ("5000000000", fmt::format("{}", big_enum_value));
-}
-#endif
-
-TEST(format_test, non_null_terminated_format_string) {
-  EXPECT_EQ("42", fmt::format(string_view("{}foo", 2), 42));
-}
-
-struct variant {
-  enum { int_type, string_type } type;
-  explicit variant(int) : type(int_type) {}
-  explicit variant(const char*) : type(string_type) {}
-};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<variant> : dynamic_formatter<> {
-  auto format(variant value, format_context& ctx) -> decltype(ctx.out()) {
-    if (value.type == variant::int_type)
-      return dynamic_formatter<>::format(42, ctx);
-    return dynamic_formatter<>::format("foo", ctx);
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(format_test, dynamic_formatter) {
-  auto num = variant(42);
-  auto str = variant("foo");
-  EXPECT_EQ("42", fmt::format("{:d}", num));
-  EXPECT_EQ("foo", fmt::format("{:s}", str));
-  EXPECT_EQ(" 42 foo ", fmt::format("{:{}} {:{}}", num, 3, str, 4));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:{}}"), num), format_error,
-                   "cannot switch from manual to automatic argument indexing");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:{0}}"), num), format_error,
-                   "cannot switch from automatic to manual argument indexing");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:+}"), str), format_error,
-                   "format specifier requires numeric argument");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:-}"), str), format_error,
-                   "format specifier requires numeric argument");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{: }"), str), format_error,
-                   "format specifier requires numeric argument");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:#}"), str), format_error,
-                   "format specifier requires numeric argument");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:0}"), str), format_error,
-                   "format specifier requires numeric argument");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{:.2}"), num), format_error,
-                   "precision not allowed for this argument type");
-}
-
-namespace adl_test {
-namespace fmt {
-namespace detail {
-struct foo {};
-template <typename, typename OutputIt> void write(OutputIt, foo) = delete;
-}  // namespace detail
-}  // namespace fmt
-}  // namespace adl_test
-
-FMT_BEGIN_NAMESPACE
-template <>
-struct formatter<adl_test::fmt::detail::foo> : formatter<std::string> {
-  template <typename FormatContext>
-  auto format(adl_test::fmt::detail::foo, FormatContext& ctx)
-      -> decltype(ctx.out()) {
-    return formatter<std::string>::format("foo", ctx);
-  }
-};
-FMT_END_NAMESPACE
-
-struct convertible_to_int {
-  operator int() const { return value; }
-
-  int value = 42;
-};
-
-TEST(format_test, to_string) {
-  EXPECT_EQ(fmt::to_string(42), "42");
-  EXPECT_EQ(fmt::to_string(reinterpret_cast<void*>(0x1234)), "0x1234");
-  EXPECT_EQ(fmt::to_string(adl_test::fmt::detail::foo()), "foo");
-  EXPECT_EQ(fmt::to_string(convertible_to_int()), "42");
-
-  enum foo : unsigned char { zero };
-  EXPECT_EQ(fmt::to_string(zero), "0");
-}
-
-TEST(format_test, output_iterators) {
-  std::list<char> out;
-  fmt::format_to(std::back_inserter(out), "{}", 42);
-  EXPECT_EQ("42", std::string(out.begin(), out.end()));
-  std::stringstream s;
-  fmt::format_to(std::ostream_iterator<char>(s), "{}", 42);
-  EXPECT_EQ("42", s.str());
-}
-
-TEST(format_test, formatted_size) {
-  EXPECT_EQ(2u, fmt::formatted_size("{}", 42));
-}
-
-TEST(format_test, format_to_no_args) {
-  std::string s;
-  fmt::format_to(std::back_inserter(s), "test");
-  EXPECT_EQ("test", s);
-}
-
-TEST(format_test, format_to) {
-  std::string s;
-  fmt::format_to(std::back_inserter(s), "part{0}", 1);
-  EXPECT_EQ("part1", s);
-  fmt::format_to(std::back_inserter(s), "part{0}", 2);
-  EXPECT_EQ("part1part2", s);
-}
-
-TEST(format_test, format_to_memory_buffer) {
-  auto buf = fmt::basic_memory_buffer<char, 100>();
-  fmt::format_to(fmt::appender(buf), "{}", "foo");
-  EXPECT_EQ("foo", to_string(buf));
-}
-
-TEST(format_test, format_to_vector) {
-  std::vector<char> v;
-  fmt::format_to(std::back_inserter(v), "{}", "foo");
-  EXPECT_EQ(string_view(v.data(), v.size()), "foo");
-}
-
-struct nongrowing_container {
-  using value_type = char;
-  void push_back(char) { throw std::runtime_error("can't take it any more"); }
-};
-
-TEST(format_test, format_to_propagates_exceptions) {
-  auto c = nongrowing_container();
-  EXPECT_THROW(fmt::format_to(std::back_inserter(c), "{}", 42),
-               std::runtime_error);
-}
-
-TEST(format_test, format_to_n) {
-  char buffer[4];
-  buffer[3] = 'x';
-  auto result = fmt::format_to_n(buffer, 3, "{}", 12345);
-  EXPECT_EQ(5u, result.size);
-  EXPECT_EQ(buffer + 3, result.out);
-  EXPECT_EQ("123x", fmt::string_view(buffer, 4));
-
-  result = fmt::format_to_n(buffer, 3, "{:s}", "foobar");
-  EXPECT_EQ(6u, result.size);
-  EXPECT_EQ(buffer + 3, result.out);
-  EXPECT_EQ("foox", fmt::string_view(buffer, 4));
-
-  buffer[0] = 'x';
-  buffer[1] = 'x';
-  buffer[2] = 'x';
-  result = fmt::format_to_n(buffer, 3, "{}", 'A');
-  EXPECT_EQ(1u, result.size);
-  EXPECT_EQ(buffer + 1, result.out);
-  EXPECT_EQ("Axxx", fmt::string_view(buffer, 4));
-
-  result = fmt::format_to_n(buffer, 3, "{}{} ", 'B', 'C');
-  EXPECT_EQ(3u, result.size);
-  EXPECT_EQ(buffer + 3, result.out);
-  EXPECT_EQ("BC x", fmt::string_view(buffer, 4));
-
-  result = fmt::format_to_n(buffer, 4, "{}", "ABCDE");
-  EXPECT_EQ(5u, result.size);
-  EXPECT_EQ("ABCD", fmt::string_view(buffer, 4));
-
-  buffer[3] = 'x';
-  result = fmt::format_to_n(buffer, 3, "{}", std::string(1000, '*'));
-  EXPECT_EQ(1000u, result.size);
-  EXPECT_EQ("***x", fmt::string_view(buffer, 4));
-}
-
-struct test_output_iterator {
-  char* data;
-
-  using iterator_category = std::output_iterator_tag;
-  using value_type = void;
-  using difference_type = void;
-  using pointer = void;
-  using reference = void;
-
-  test_output_iterator& operator++() {
-    ++data;
-    return *this;
-  }
-  test_output_iterator operator++(int) {
-    auto tmp = *this;
-    ++data;
-    return tmp;
-  }
-  char& operator*() { return *data; }
-};
-
-TEST(format_test, format_to_n_output_iterator) {
-  char buf[10] = {};
-  fmt::format_to_n(test_output_iterator{buf}, 10, "{}", 42);
-  EXPECT_STREQ(buf, "42");
-}
-
-#if FMT_USE_CONSTEXPR
-struct test_error_handler {
-  const char*& error;
-
-  FMT_CONSTEXPR test_error_handler(const char*& err) : error(err) {}
-
-  FMT_CONSTEXPR test_error_handler(const test_error_handler& other)
-      : error(other.error) {}
-
-  FMT_CONSTEXPR void on_error(const char* message) {
-    if (!error) error = message;
-  }
-};
-
-FMT_CONSTEXPR size_t len(const char* s) {
-  size_t len = 0;
-  while (*s++) ++len;
-  return len;
-}
-
-FMT_CONSTEXPR bool equal(const char* s1, const char* s2) {
-  if (!s1 || !s2) return s1 == s2;
-  while (*s1 && *s1 == *s2) {
-    ++s1;
-    ++s2;
-  }
-  return *s1 == *s2;
-}
-
-template <typename... Args>
-FMT_CONSTEXPR bool test_error(const char* fmt, const char* expected_error) {
-  const char* actual_error = nullptr;
-  auto s = string_view(fmt, len(fmt));
-  auto checker =
-      fmt::detail::format_string_checker<char, test_error_handler, Args...>(
-          s, test_error_handler(actual_error));
-  fmt::detail::parse_format_string<true>(s, checker);
-  return equal(actual_error, expected_error);
-}
-
-#  define EXPECT_ERROR_NOARGS(fmt, error) \
-    static_assert(test_error(fmt, error), "")
-#  define EXPECT_ERROR(fmt, error, ...) \
-    static_assert(test_error<__VA_ARGS__>(fmt, error), "")
-
-TEST(format_test, format_string_errors) {
-  EXPECT_ERROR_NOARGS("foo", nullptr);
-  EXPECT_ERROR_NOARGS("}", "unmatched '}' in format string");
-  EXPECT_ERROR("{0:s", "unknown format specifier", date);
-#  if !FMT_MSC_VER || FMT_MSC_VER >= 1916
-  // This causes an detail compiler error in MSVC2017.
-  EXPECT_ERROR("{:{<}", "invalid fill character '{'", int);
-  EXPECT_ERROR("{:10000000000}", "number is too big", int);
-  EXPECT_ERROR("{:.10000000000}", "number is too big", int);
-  EXPECT_ERROR_NOARGS("{:x}", "argument not found");
-  EXPECT_ERROR("{:+}", "format specifier requires numeric argument",
-               const char*);
-  EXPECT_ERROR("{:-}", "format specifier requires numeric argument",
-               const char*);
-  EXPECT_ERROR("{:#}", "format specifier requires numeric argument",
-               const char*);
-  EXPECT_ERROR("{: }", "format specifier requires numeric argument",
-               const char*);
-  EXPECT_ERROR("{:0}", "format specifier requires numeric argument",
-               const char*);
-  EXPECT_ERROR("{:+}", "format specifier requires signed argument", unsigned);
-  EXPECT_ERROR("{:-}", "format specifier requires signed argument", unsigned);
-  EXPECT_ERROR("{: }", "format specifier requires signed argument", unsigned);
-  EXPECT_ERROR("{:{}}", "argument not found", int);
-  EXPECT_ERROR("{:.{}}", "argument not found", double);
-  EXPECT_ERROR("{:.2}", "precision not allowed for this argument type", int);
-  EXPECT_ERROR("{:s}", "invalid type specifier", int);
-  EXPECT_ERROR("{:s}", "invalid type specifier", char);
-  EXPECT_ERROR("{:+}", "invalid format specifier for char", char);
-  EXPECT_ERROR("{:s}", "invalid type specifier", double);
-  EXPECT_ERROR("{:d}", "invalid type specifier", const char*);
-  EXPECT_ERROR("{:d}", "invalid type specifier", std::string);
-  EXPECT_ERROR("{:s}", "invalid type specifier", void*);
-#  else
-  fmt::print("warning: constexpr is broken in this version of MSVC\n");
-#  endif
-#  if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-  EXPECT_ERROR("{foo}", "named argument is not found", decltype("bar"_a = 42));
-  EXPECT_ERROR("{foo}", "named argument is not found",
-               decltype(fmt::arg("foo", 42)));
-#  else
-  EXPECT_ERROR("{foo}",
-               "compile-time checks for named arguments require C++20 support",
-               int);
-#  endif
-  EXPECT_ERROR_NOARGS("{10000000000}", "argument not found");
-  EXPECT_ERROR_NOARGS("{0x}", "invalid format string");
-  EXPECT_ERROR_NOARGS("{-}", "invalid format string");
-  EXPECT_ERROR("{:{0x}}", "invalid format string", int);
-  EXPECT_ERROR("{:{-}}", "invalid format string", int);
-  EXPECT_ERROR("{:.{0x}}", "invalid format string", int);
-  EXPECT_ERROR("{:.{-}}", "invalid format string", int);
-  EXPECT_ERROR("{:.x}", "missing precision specifier", int);
-  EXPECT_ERROR_NOARGS("{}", "argument not found");
-  EXPECT_ERROR("{1}", "argument not found", int);
-  EXPECT_ERROR("{1}{}",
-               "cannot switch from manual to automatic argument indexing", int,
-               int);
-  EXPECT_ERROR("{}{1}",
-               "cannot switch from automatic to manual argument indexing", int,
-               int);
-}
-
-TEST(format_test, vformat_to) {
-  using context = fmt::format_context;
-  fmt::basic_format_arg<context> arg = fmt::detail::make_arg<context>(42);
-  auto args = fmt::basic_format_args<context>(&arg, 1);
-  auto s = std::string();
-  fmt::vformat_to(std::back_inserter(s), "{}", args);
-  EXPECT_EQ("42", s);
-  s.clear();
-  fmt::vformat_to(std::back_inserter(s), FMT_STRING("{}"), args);
-  EXPECT_EQ("42", s);
-}
-
-#endif  // FMT_USE_CONSTEXPR
-
-TEST(format_test, char_traits_is_not_ambiguous) {
-  // Test that we don't inject detail names into the std namespace.
-  using namespace std;
-  auto c = char_traits<char>::char_type();
-  (void)c;
-#if __cplusplus >= 201103L
-  auto s = std::string();
-  auto lval = begin(s);
-  (void)lval;
-#endif
-}
-
-struct check_back_appender {};
-
-FMT_BEGIN_NAMESPACE
-template <> struct formatter<check_back_appender> {
-  auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  template <typename Context>
-  auto format(check_back_appender, Context& ctx) -> decltype(ctx.out()) {
-    auto out = ctx.out();
-    static_assert(std::is_same<decltype(++out), decltype(out)&>::value,
-                  "needs to satisfy weakly_incrementable");
-    *out = 'y';
-    return ++out;
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(format_test, back_insert_slicing) {
-  EXPECT_EQ(fmt::format("{}", check_back_appender{}), "y");
-}
-
-template <typename Char, typename T> bool check_enabled_formatter() {
-  static_assert(std::is_default_constructible<fmt::formatter<T, Char>>::value,
-                "");
-  return true;
-}
-
-template <typename Char, typename... T> void check_enabled_formatters() {
-  auto dummy = {check_enabled_formatter<Char, T>()...};
-  (void)dummy;
-}
-
-TEST(format_test, test_formatters_enabled) {
-  check_enabled_formatters<char, bool, char, signed char, unsigned char, short,
-                           unsigned short, int, unsigned, long, unsigned long,
-                           long long, unsigned long long, float, double,
-                           long double, void*, const void*, char*, const char*,
-                           std::string, std::nullptr_t>();
-  check_enabled_formatters<wchar_t, bool, wchar_t, signed char, unsigned char,
-                           short, unsigned short, int, unsigned, long,
-                           unsigned long, long long, unsigned long long, float,
-                           double, long double, void*, const void*, wchar_t*,
-                           const wchar_t*, std::wstring, std::nullptr_t>();
-}
-
-TEST(format_int_test, data) {
-  fmt::format_int format_int(42);
-  EXPECT_EQ("42", std::string(format_int.data(), format_int.size()));
-}
-
-TEST(format_int_test, format_int) {
-  EXPECT_EQ("42", fmt::format_int(42).str());
-  EXPECT_EQ(2u, fmt::format_int(42).size());
-  EXPECT_EQ("-42", fmt::format_int(-42).str());
-  EXPECT_EQ(3u, fmt::format_int(-42).size());
-  EXPECT_EQ("42", fmt::format_int(42ul).str());
-  EXPECT_EQ("-42", fmt::format_int(-42l).str());
-  EXPECT_EQ("42", fmt::format_int(42ull).str());
-  EXPECT_EQ("-42", fmt::format_int(-42ll).str());
-  std::ostringstream os;
-  os << max_value<int64_t>();
-  EXPECT_EQ(os.str(), fmt::format_int(max_value<int64_t>()).str());
-}
diff --git a/3rdparty/fmt/test/fuzzing/.gitignore b/3rdparty/fmt/test/fuzzing/.gitignore
deleted file mode 100644
index ea410402..00000000
--- a/3rdparty/fmt/test/fuzzing/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-# ignore artifacts from the build.sh script
-build-*/
-
diff --git a/3rdparty/fmt/test/fuzzing/CMakeLists.txt b/3rdparty/fmt/test/fuzzing/CMakeLists.txt
deleted file mode 100644
index 0280c5cd..00000000
--- a/3rdparty/fmt/test/fuzzing/CMakeLists.txt
+++ /dev/null
@@ -1,30 +0,0 @@
-# Copyright (c) 2019, Paul Dreik
-# License: see LICENSE.rst in the fmt root directory
-
-# Link in the main function. Useful for reproducing, kcov, gdb, afl, valgrind.
-# (Note that libFuzzer can also reproduce, just pass it the files.)
-option(FMT_FUZZ_LINKMAIN "Enables the reproduce mode, instead of libFuzzer" On)
-
-# For oss-fuzz - insert $LIB_FUZZING_ENGINE into the link flags, but only for
-# the fuzz targets, otherwise the CMake configuration step fails.
-set(FMT_FUZZ_LDFLAGS "" CACHE STRING "LDFLAGS for the fuzz targets")
-
-# Adds a binary for reproducing, i.e. no fuzzing, just enables replaying data
-# through the fuzzers.
-function(add_fuzzer source)
-  get_filename_component(basename ${source} NAME_WE)
-  set(name ${basename}-fuzzer)
-  add_executable(${name} ${source} fuzzer-common.h)
-  if (FMT_FUZZ_LINKMAIN)
-    target_sources(${name} PRIVATE main.cc)
-  endif ()
-  target_link_libraries(${name} PRIVATE fmt)
-  if (FMT_FUZZ_LDFLAGS)
-    target_link_libraries(${name} PRIVATE ${FMT_FUZZ_LDFLAGS})
-  endif ()
-  target_compile_features(${name} PRIVATE cxx_generic_lambdas)
-endfunction()
-
-foreach (source chrono-duration.cc chrono-timepoint.cc float.cc named-arg.cc one-arg.cc two-args.cc)
-  add_fuzzer(${source})
-endforeach ()
diff --git a/3rdparty/fmt/test/fuzzing/README.md b/3rdparty/fmt/test/fuzzing/README.md
deleted file mode 100644
index bb3d0e04..00000000
--- a/3rdparty/fmt/test/fuzzing/README.md
+++ /dev/null
@@ -1,25 +0,0 @@
-# Running the fuzzers locally
-
-There is a [helper script](build.sh) to build the fuzzers, which has only been
-tested on Debian and Ubuntu linux so far. There should be no problems fuzzing on
-Windows (using clang>=8) or on Mac, but the script will probably not work out of
-the box.
-
-Something along
-```sh
-mkdir build
-cd build
-export CXX=clang++
-export CXXFLAGS="-fsanitize=fuzzer-no-link -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION= -g"
-cmake .. -DFMT_SAFE_DURATION_CAST=On -DFMT_FUZZ=On -DFMT_FUZZ_LINKMAIN=Off -DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer"
-cmake --build .
-```
-should work to build the fuzzers for all platforms which clang supports.
-
-Execute a fuzzer with for instance
-```sh
-cd build
-export UBSAN_OPTIONS=halt_on_error=1
-mkdir out_chrono
-bin/fuzzer_chrono_duration out_chrono
-```
diff --git a/3rdparty/fmt/test/fuzzing/build.sh b/3rdparty/fmt/test/fuzzing/build.sh
deleted file mode 100644
index 4497b62c..00000000
--- a/3rdparty/fmt/test/fuzzing/build.sh
+++ /dev/null
@@ -1,90 +0,0 @@
-#!/bin/sh
-#
-# Creates fuzzer builds of various kinds
-# - oss-fuzz emulated mode (makes sure a simulated invocation by oss-fuzz works)
-# - libFuzzer build (you will need clang)
-# - afl build (you will need afl)
-#
-#
-# Copyright (c) 2019 Paul Dreik
-#
-# For the license information refer to format.h.
-
-set -e
-me=$(basename $0)
-root=$(readlink -f "$(dirname "$0")/../..")
-
-
-echo $me: root=$root
-
-here=$(pwd)
-
-CXXFLAGSALL="-DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION= -g"
-CMAKEFLAGSALL="$root -GNinja -DCMAKE_BUILD_TYPE=Debug -DFMT_DOC=Off -DFMT_TEST=Off -DFMT_FUZZ=On -DCMAKE_CXX_STANDARD=17"
-
-CLANG=clang++-11
-
-# For performance analysis of the fuzzers.
-builddir=$here/build-fuzzers-perfanalysis
-mkdir -p $builddir
-cd $builddir
-CXX="ccache g++" CXXFLAGS="$CXXFLAGSALL -g" cmake \
-$CMAKEFLAGSALL \
--DFMT_FUZZ_LINKMAIN=On \
--DCMAKE_BUILD_TYPE=Release
-
-cmake --build $builddir
-
-# Builds the fuzzers as oss-fuzz does.
-builddir=$here/build-fuzzers-ossfuzz
-mkdir -p $builddir
-cd $builddir
-CXX=$CLANG \
-CXXFLAGS="$CXXFLAGSALL -fsanitize=fuzzer-no-link" cmake \
-cmake $CMAKEFLAGSALL \
--DFMT_FUZZ_LINKMAIN=Off \
--DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer"
-
-cmake --build $builddir
-
-
-# Builds fuzzers for local fuzzing with libfuzzer with asan+usan.
-builddir=$here/build-fuzzers-libfuzzer
-mkdir -p $builddir
-cd $builddir
-CXX=$CLANG \
-CXXFLAGS="$CXXFLAGSALL -fsanitize=fuzzer-no-link,address,undefined" cmake \
-cmake $CMAKEFLAGSALL \
--DFMT_FUZZ_LINKMAIN=Off \
--DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer"
-
-cmake --build $builddir
-
-# Builds a fast fuzzer for making coverage fast.
-builddir=$here/build-fuzzers-fast
-mkdir -p $builddir
-cd $builddir
-CXX=$CLANG \
-CXXFLAGS="$CXXFLAGSALL -fsanitize=fuzzer-no-link -O3" cmake \
-cmake $CMAKEFLAGSALL \
--DFMT_FUZZ_LINKMAIN=Off \
--DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer" \
- -DCMAKE_BUILD_TYPE=Release
-
-cmake --build $builddir
-
-
-# Builds fuzzers for local fuzzing with afl.
-builddir=$here/build-fuzzers-afl
-mkdir -p $builddir
-cd $builddir
-CXX="afl-g++" \
-CXXFLAGS="$CXXFLAGSALL -fsanitize=address,undefined" \
-cmake $CMAKEFLAGSALL \
--DFMT_FUZZ_LINKMAIN=On
-
-cmake --build $builddir
-
-
-echo $me: all good
-
diff --git a/3rdparty/fmt/test/fuzzing/chrono-duration.cc b/3rdparty/fmt/test/fuzzing/chrono-duration.cc
deleted file mode 100644
index d66068d9..00000000
--- a/3rdparty/fmt/test/fuzzing/chrono-duration.cc
+++ /dev/null
@@ -1,136 +0,0 @@
-// Copyright (c) 2019, Paul Dreik
-// For the license information refer to format.h.
-
-#include <fmt/chrono.h>
-
-#include <cstdint>
-
-#include "fuzzer-common.h"
-
-template <typename Period, typename Rep>
-void invoke_inner(fmt::string_view format_str, Rep rep) {
-  auto value = std::chrono::duration<Rep, Period>(rep);
-  try {
-#if FMT_FUZZ_FORMAT_TO_STRING
-    std::string message = fmt::format(format_str, value);
-#else
-    auto buf = fmt::memory_buffer();
-    fmt::format_to(std::back_inserter(buf), format_str, value);
-#endif
-  } catch (std::exception&) {
-  }
-}
-
-// Rep is a duration's representation type.
-template <typename Rep>
-void invoke_outer(const uint8_t* data, size_t size, int period) {
-  // Always use a fixed location of the data.
-  static_assert(sizeof(Rep) <= fixed_size, "fixed size is too small");
-  if (size <= fixed_size + 1) return;
-
-  const Rep rep = assign_from_buf<Rep>(data);
-  data += fixed_size;
-  size -= fixed_size;
-
-  // data is already allocated separately in libFuzzer so reading past the end
-  // will most likely be detected anyway.
-  const auto format_str = fmt::string_view(as_chars(data), size);
-
-  // yocto, zepto, zetta and yotta are not handled.
-  switch (period) {
-  case 1:
-    invoke_inner<std::atto>(format_str, rep);
-    break;
-  case 2:
-    invoke_inner<std::femto>(format_str, rep);
-    break;
-  case 3:
-    invoke_inner<std::pico>(format_str, rep);
-    break;
-  case 4:
-    invoke_inner<std::nano>(format_str, rep);
-    break;
-  case 5:
-    invoke_inner<std::micro>(format_str, rep);
-    break;
-  case 6:
-    invoke_inner<std::milli>(format_str, rep);
-    break;
-  case 7:
-    invoke_inner<std::centi>(format_str, rep);
-    break;
-  case 8:
-    invoke_inner<std::deci>(format_str, rep);
-    break;
-  case 9:
-    invoke_inner<std::deca>(format_str, rep);
-    break;
-  case 10:
-    invoke_inner<std::kilo>(format_str, rep);
-    break;
-  case 11:
-    invoke_inner<std::mega>(format_str, rep);
-    break;
-  case 12:
-    invoke_inner<std::giga>(format_str, rep);
-    break;
-  case 13:
-    invoke_inner<std::tera>(format_str, rep);
-    break;
-  case 14:
-    invoke_inner<std::peta>(format_str, rep);
-    break;
-  case 15:
-    invoke_inner<std::exa>(format_str, rep);
-    break;
-  }
-}
-
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-  if (size <= 4) return 0;
-
-  const auto representation = data[0];
-  const auto period = data[1];
-  data += 2;
-  size -= 2;
-
-  switch (representation) {
-  case 1:
-    invoke_outer<char>(data, size, period);
-    break;
-  case 2:
-    invoke_outer<signed char>(data, size, period);
-    break;
-  case 3:
-    invoke_outer<unsigned char>(data, size, period);
-    break;
-  case 4:
-    invoke_outer<short>(data, size, period);
-    break;
-  case 5:
-    invoke_outer<unsigned short>(data, size, period);
-    break;
-  case 6:
-    invoke_outer<int>(data, size, period);
-    break;
-  case 7:
-    invoke_outer<unsigned int>(data, size, period);
-    break;
-  case 8:
-    invoke_outer<long>(data, size, period);
-    break;
-  case 9:
-    invoke_outer<unsigned long>(data, size, period);
-    break;
-  case 10:
-    invoke_outer<float>(data, size, period);
-    break;
-  case 11:
-    invoke_outer<double>(data, size, period);
-    break;
-  case 12:
-    invoke_outer<long double>(data, size, period);
-    break;
-  }
-  return 0;
-}
diff --git a/3rdparty/fmt/test/fuzzing/chrono-timepoint.cc b/3rdparty/fmt/test/fuzzing/chrono-timepoint.cc
deleted file mode 100644
index 8a1b24d2..00000000
--- a/3rdparty/fmt/test/fuzzing/chrono-timepoint.cc
+++ /dev/null
@@ -1,32 +0,0 @@
-// Copyright (c) 2021, Paul Dreik
-// For license information refer to format.h.
-#include <fmt/chrono.h>
-
-#include "fuzzer-common.h"
-
-/*
- * a fuzzer for the chrono timepoints formatters
- * C is a clock (std::chrono::system_clock etc)
- */
-template <typename C> void doit(const uint8_t* data, size_t size) {
-  using Rep = typename C::time_point::rep;
-  constexpr auto N = sizeof(Rep);
-  if (size < N) return;
-
-  const auto x = assign_from_buf<Rep>(data);
-  typename C::duration dur{x};
-  typename C::time_point timepoint{dur};
-  data += N;
-  size -= N;
-  data_to_string format_str(data, size);
-
-  std::string message = fmt::format(format_str.get(), timepoint);
-}
-
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-  try {
-    doit<std::chrono::system_clock>(data, size);
-  } catch (...) {
-  }
-  return 0;
-}
diff --git a/3rdparty/fmt/test/fuzzing/float.cc b/3rdparty/fmt/test/fuzzing/float.cc
deleted file mode 100644
index d4c9e4f5..00000000
--- a/3rdparty/fmt/test/fuzzing/float.cc
+++ /dev/null
@@ -1,39 +0,0 @@
-// A fuzzer for floating-point formatter.
-// For the license information refer to format.h.
-
-#include <fmt/format.h>
-
-#include <cstdint>
-#include <cstdlib>
-#include <limits>
-#include <stdexcept>
-
-#include "fuzzer-common.h"
-
-void check_round_trip(fmt::string_view format_str, double value) {
-  auto buffer = fmt::memory_buffer();
-  fmt::format_to(std::back_inserter(buffer), format_str, value);
-
-  if (std::isnan(value)) {
-    auto nan = std::signbit(value) ? "-nan" : "nan";
-    if (fmt::string_view(buffer.data(), buffer.size()) != nan)
-      throw std::runtime_error("round trip failure");
-    return;
-  }
-
-  buffer.push_back('\0');
-  char* ptr = nullptr;
-  if (std::strtod(buffer.data(), &ptr) != value)
-    throw std::runtime_error("round trip failure");
-  if (ptr + 1 != buffer.end()) throw std::runtime_error("unparsed output");
-}
-
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-  if (size <= sizeof(double) || !std::numeric_limits<double>::is_iec559)
-    return 0;
-  check_round_trip("{}", assign_from_buf<double>(data));
-  // A larger than necessary precision is used to trigger the fallback
-  // formatter.
-  check_round_trip("{:.50g}", assign_from_buf<double>(data));
-  return 0;
-}
diff --git a/3rdparty/fmt/test/fuzzing/fuzzer-common.h b/3rdparty/fmt/test/fuzzing/fuzzer-common.h
deleted file mode 100644
index c0a24672..00000000
--- a/3rdparty/fmt/test/fuzzing/fuzzer-common.h
+++ /dev/null
@@ -1,77 +0,0 @@
-// Copyright (c) 2019, Paul Dreik
-// For the license information refer to format.h.
-
-#ifndef FUZZER_COMMON_H
-#define FUZZER_COMMON_H
-
-#include <fmt/core.h>
-
-#include <cstdint>  // std::uint8_t
-#include <cstring>  // memcpy
-#include <vector>
-
-// One can format to either a string, or a buffer. The latter is faster, but
-// one may be interested in formatting to a string instead to verify it works
-// as intended. To avoid a combinatoric explosion, select this at compile time
-// instead of dynamically from the fuzz data.
-#define FMT_FUZZ_FORMAT_TO_STRING 0
-
-// If {fmt} is given a buffer that is separately allocated, chances that address
-// sanitizer detects out of bound reads is much higher. However, it slows down
-// the fuzzing.
-#define FMT_FUZZ_SEPARATE_ALLOCATION 1
-
-// The size of the largest possible type in use.
-// To let the the fuzzer mutation be efficient at cross pollinating between
-// different types, use a fixed size format. The same bit pattern, interpreted
-// as another type, is likely interesting.
-constexpr auto fixed_size = 16;
-
-// Casts data to a char pointer.
-template <typename T> inline const char* as_chars(const T* data) {
-  return reinterpret_cast<const char*>(data);
-}
-
-// Casts data to a byte pointer.
-template <typename T> inline const std::uint8_t* as_bytes(const T* data) {
-  return reinterpret_cast<const std::uint8_t*>(data);
-}
-
-// Blits bytes from data to form an (assumed trivially constructible) object
-// of type Item.
-template <class Item> inline Item assign_from_buf(const std::uint8_t* data) {
-  auto item = Item();
-  std::memcpy(&item, data, sizeof(Item));
-  return item;
-}
-
-// Reads a boolean value by looking at the first byte from data.
-template <> inline bool assign_from_buf<bool>(const std::uint8_t* data) {
-  return *data != 0;
-}
-
-struct data_to_string {
-#if FMT_FUZZ_SEPARATE_ALLOCATION
-  std::vector<char> buffer;
-
-  data_to_string(const uint8_t* data, size_t size, bool add_terminator = false)
-      : buffer(size + (add_terminator ? 1 : 0)) {
-    if (size) {
-      std::memcpy(buffer.data(), data, size);
-    }
-  }
-
-  fmt::string_view get() const { return {buffer.data(), buffer.size()}; }
-#else
-  fmt::string_view sv;
-
-  data_to_string(const uint8_t* data, size_t size, bool = false)
-      : str(as_chars(data), size) {}
-
-  fmt::string_view get() const { return sv; }
-#endif
-
-  const char* data() const { return get().data(); }
-};
-
-#endif  // FUZZER_COMMON_H
diff --git a/3rdparty/fmt/test/fuzzing/main.cc b/3rdparty/fmt/test/fuzzing/main.cc
deleted file mode 100644
index 8f8c719b..00000000
--- a/3rdparty/fmt/test/fuzzing/main.cc
+++ /dev/null
@@ -1,22 +0,0 @@
-#include <cassert>
-#include <fstream>
-#include <vector>
-
-#include "fuzzer-common.h"
-
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
-
-int main(int argc, char** argv) {
-  for (int i = 1; i < argc; ++i) {
-    std::ifstream in(argv[i]);
-    assert(in);
-    in.seekg(0, std::ios_base::end);
-    const auto size = in.tellg();
-    assert(size >= 0);
-    in.seekg(0, std::ios_base::beg);
-    std::vector<char> buf(static_cast<size_t>(size));
-    in.read(buf.data(), size);
-    assert(in.gcount() == size);
-    LLVMFuzzerTestOneInput(as_bytes(buf.data()), buf.size());
-  }
-}
diff --git a/3rdparty/fmt/test/fuzzing/named-arg.cc b/3rdparty/fmt/test/fuzzing/named-arg.cc
deleted file mode 100644
index 3bee1ae3..00000000
--- a/3rdparty/fmt/test/fuzzing/named-arg.cc
+++ /dev/null
@@ -1,102 +0,0 @@
-// Copyright (c) 2019, Paul Dreik
-// For the license information refer to format.h.
-
-#include <fmt/chrono.h>
-
-#include <cstdint>
-#include <type_traits>
-#include <vector>
-
-#include "fuzzer-common.h"
-
-template <typename T>
-void invoke_fmt(const uint8_t* data, size_t size, unsigned arg_name_size) {
-  static_assert(sizeof(T) <= fixed_size, "fixed_size too small");
-  if (size <= fixed_size) return;
-  const T value = assign_from_buf<T>(data);
-  data += fixed_size;
-  size -= fixed_size;
-
-  if (arg_name_size <= 0 || arg_name_size >= size) return;
-  data_to_string arg_name(data, arg_name_size, true);
-  data += arg_name_size;
-  size -= arg_name_size;
-
-  data_to_string format_str(data, size);
-  try {
-#if FMT_FUZZ_FORMAT_TO_STRING
-    std::string message =
-        fmt::format(format_str.get(), fmt::arg(arg_name.data(), value));
-#else
-    fmt::memory_buffer out;
-    fmt::format_to(std::back_inserter(out), format_str.get(),
-                   fmt::arg(arg_name.data(), value));
-#endif
-  } catch (std::exception&) {
-  }
-}
-
-// For dynamic dispatching to an explicit instantiation.
-template <typename Callback> void invoke(int type, Callback callback) {
-  switch (type) {
-  case 0:
-    callback(bool());
-    break;
-  case 1:
-    callback(char());
-    break;
-  case 2:
-    using sc = signed char;
-    callback(sc());
-    break;
-  case 3:
-    using uc = unsigned char;
-    callback(uc());
-    break;
-  case 4:
-    callback(short());
-    break;
-  case 5:
-    using us = unsigned short;
-    callback(us());
-    break;
-  case 6:
-    callback(int());
-    break;
-  case 7:
-    callback(unsigned());
-    break;
-  case 8:
-    callback(long());
-    break;
-  case 9:
-    using ul = unsigned long;
-    callback(ul());
-    break;
-  case 10:
-    callback(float());
-    break;
-  case 11:
-    callback(double());
-    break;
-  case 12:
-    using LD = long double;
-    callback(LD());
-    break;
-  }
-}
-
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-  if (size <= 3) return 0;
-
-  // Switch types depending on the first byte of the input.
-  const auto type = data[0] & 0x0F;
-  const unsigned arg_name_size = (data[0] & 0xF0) >> 4;
-  data++;
-  size--;
-
-  invoke(type, [=](auto arg) {
-    invoke_fmt<decltype(arg)>(data, size, arg_name_size);
-  });
-  return 0;
-}
diff --git a/3rdparty/fmt/test/fuzzing/one-arg.cc b/3rdparty/fmt/test/fuzzing/one-arg.cc
deleted file mode 100644
index 90cec716..00000000
--- a/3rdparty/fmt/test/fuzzing/one-arg.cc
+++ /dev/null
@@ -1,92 +0,0 @@
-// Copyright (c) 2019, Paul Dreik
-// For the license information refer to format.h.
-
-#include <fmt/chrono.h>
-
-#include <cstdint>
-#include <exception>
-
-#include "fuzzer-common.h"
-
-template <typename T, typename Repr> const T* from_repr(const Repr& r) {
-  return &r;
-}
-
-template <> const std::tm* from_repr<std::tm>(const std::time_t& t) {
-  return std::localtime(&t);
-}
-
-template <typename T, typename Repr = T>
-void invoke_fmt(const uint8_t* data, size_t size) {
-  static_assert(sizeof(Repr) <= fixed_size, "Nfixed is too small");
-  if (size <= fixed_size) return;
-  auto repr = assign_from_buf<Repr>(data);
-  const T* value = from_repr<T>(repr);
-  if (!value) return;
-  data += fixed_size;
-  size -= fixed_size;
-  data_to_string format_str(data, size);
-  try {
-#if FMT_FUZZ_FORMAT_TO_STRING
-    std::string message = fmt::format(format_str.get(), *value);
-#else
-    fmt::memory_buffer message;
-    fmt::format_to(message, format_str.get(), *value);
-#endif
-  } catch (std::exception&) {
-  }
-}
-
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-  if (size <= 3) return 0;
-
-  const auto first = data[0];
-  data++;
-  size--;
-
-  switch (first) {
-  case 0:
-    invoke_fmt<bool>(data, size);
-    break;
-  case 1:
-    invoke_fmt<char>(data, size);
-    break;
-  case 2:
-    invoke_fmt<unsigned char>(data, size);
-    break;
-  case 3:
-    invoke_fmt<signed char>(data, size);
-    break;
-  case 4:
-    invoke_fmt<short>(data, size);
-    break;
-  case 5:
-    invoke_fmt<unsigned short>(data, size);
-    break;
-  case 6:
-    invoke_fmt<int>(data, size);
-    break;
-  case 7:
-    invoke_fmt<unsigned int>(data, size);
-    break;
-  case 8:
-    invoke_fmt<long>(data, size);
-    break;
-  case 9:
-    invoke_fmt<unsigned long>(data, size);
-    break;
-  case 10:
-    invoke_fmt<float>(data, size);
-    break;
-  case 11:
-    invoke_fmt<double>(data, size);
-    break;
-  case 12:
-    invoke_fmt<long double>(data, size);
-    break;
-  case 13:
-    invoke_fmt<std::tm, std::time_t>(data, size);
-    break;
-  }
-  return 0;
-}
diff --git a/3rdparty/fmt/test/fuzzing/two-args.cc b/3rdparty/fmt/test/fuzzing/two-args.cc
deleted file mode 100644
index 979320c2..00000000
--- a/3rdparty/fmt/test/fuzzing/two-args.cc
+++ /dev/null
@@ -1,106 +0,0 @@
-// Copyright (c) 2019, Paul Dreik
-// For the license information refer to format.h.
-
-#include <fmt/format.h>
-
-#include <cstdint>
-#include <exception>
-#include <string>
-
-#include "fuzzer-common.h"
-
-template <typename Item1, typename Item2>
-void invoke_fmt(const uint8_t* data, size_t size) {
-  static_assert(sizeof(Item1) <= fixed_size, "size1 exceeded");
-  static_assert(sizeof(Item2) <= fixed_size, "size2 exceeded");
-  if (size <= fixed_size + fixed_size) return;
-
-  const Item1 item1 = assign_from_buf<Item1>(data);
-  data += fixed_size;
-  size -= fixed_size;
-
-  const Item2 item2 = assign_from_buf<Item2>(data);
-  data += fixed_size;
-  size -= fixed_size;
-
-  auto format_str = fmt::string_view(as_chars(data), size);
-#if FMT_FUZZ_FORMAT_TO_STRING
-  std::string message = fmt::format(format_str, item1, item2);
-#else
-  fmt::memory_buffer message;
-  fmt::format_to(message, format_str, item1, item2);
-#endif
-}
-
-// For dynamic dispatching to an explicit instantiation.
-template <typename Callback> void invoke(int index, Callback callback) {
-  switch (index) {
-  case 0:
-    callback(bool());
-    break;
-  case 1:
-    callback(char());
-    break;
-  case 2:
-    using sc = signed char;
-    callback(sc());
-    break;
-  case 3:
-    using uc = unsigned char;
-    callback(uc());
-    break;
-  case 4:
-    callback(short());
-    break;
-  case 5:
-    using us = unsigned short;
-    callback(us());
-    break;
-  case 6:
-    callback(int());
-    break;
-  case 7:
-    callback(unsigned());
-    break;
-  case 8:
-    callback(long());
-    break;
-  case 9:
-    using ul = unsigned long;
-    callback(ul());
-    break;
-  case 10:
-    callback(float());
-    break;
-  case 11:
-    callback(double());
-    break;
-  case 12:
-    using LD = long double;
-    callback(LD());
-    break;
-  case 13:
-    using ptr = void*;
-    callback(ptr());
-    break;
-  }
-}
-
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-  if (size <= 3) return 0;
-
-  // Switch types depending on the first byte of the input.
-  const auto type1 = data[0] & 0x0F;
-  const auto type2 = (data[0] & 0xF0) >> 4;
-  data++;
-  size--;
-  try {
-    invoke(type1, [=](auto param1) {
-      invoke(type2, [=](auto param2) {
-        invoke_fmt<decltype(param1), decltype(param2)>(data, size);
-      });
-    });
-  } catch (std::exception&) {
-  }
-  return 0;
-}
diff --git a/3rdparty/fmt/test/gtest-extra-test.cc b/3rdparty/fmt/test/gtest-extra-test.cc
deleted file mode 100644
index 0d86206c..00000000
--- a/3rdparty/fmt/test/gtest-extra-test.cc
+++ /dev/null
@@ -1,413 +0,0 @@
-// Formatting library for C++ - tests of custom Google Test assertions
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "gtest-extra.h"
-
-#include <gtest/gtest-spi.h>
-
-#include <cstring>
-#include <memory>
-#include <stdexcept>
-
-#include "fmt/os.h"
-#include "util.h"
-
-// Tests that assertion macros evaluate their arguments exactly once.
-namespace {
-class single_evaluation_test : public ::testing::Test {
- protected:
-  single_evaluation_test() {
-    p_ = s_;
-    a_ = 0;
-    b_ = 0;
-  }
-
-  static const char* const s_;
-  static const char* p_;
-
-  static int a_;
-  static int b_;
-};
-}  // namespace
-
-const char* const single_evaluation_test::s_ = "01234";
-const char* single_evaluation_test::p_;
-int single_evaluation_test::a_;
-int single_evaluation_test::b_;
-
-void do_nothing() {}
-
-FMT_NORETURN void throw_exception() { throw std::runtime_error("test"); }
-
-FMT_NORETURN void throw_system_error() {
-  throw fmt::system_error(EDOM, "test");
-}
-
-// Tests that when EXPECT_THROW_MSG fails, it evaluates its message argument
-// exactly once.
-TEST_F(single_evaluation_test, failed_expect_throw_msg) {
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_THROW_MSG(throw_exception(), std::exception, p_++), "01234");
-  EXPECT_EQ(s_ + 1, p_);
-}
-
-// Tests that when EXPECT_SYSTEM_ERROR fails, it evaluates its message argument
-// exactly once.
-TEST_F(single_evaluation_test, failed_expect_system_error) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, p_++),
-                          "01234");
-  EXPECT_EQ(s_ + 1, p_);
-}
-
-// Tests that assertion arguments are evaluated exactly once.
-TEST_F(single_evaluation_test, exception_tests) {
-  // successful EXPECT_THROW_MSG
-  EXPECT_THROW_MSG(
-      {  // NOLINT
-        a_++;
-        throw_exception();
-      },
-      std::exception, (b_++, "test"));
-  EXPECT_EQ(1, a_);
-  EXPECT_EQ(1, b_);
-
-  // failed EXPECT_THROW_MSG, throws different type
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(
-                              {  // NOLINT
-                                a_++;
-                                throw_exception();
-                              },
-                              std::logic_error, (b_++, "test")),
-                          "throws a different type");
-  EXPECT_EQ(2, a_);
-  EXPECT_EQ(2, b_);
-
-  // failed EXPECT_THROW_MSG, throws an exception with different message
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(
-                              {  // NOLINT
-                                a_++;
-                                throw_exception();
-                              },
-                              std::exception, (b_++, "other")),
-                          "throws an exception with a different message");
-  EXPECT_EQ(3, a_);
-  EXPECT_EQ(3, b_);
-
-  // failed EXPECT_THROW_MSG, throws nothing
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_THROW_MSG(a_++, std::exception, (b_++, "test")), "throws nothing");
-  EXPECT_EQ(4, a_);
-  EXPECT_EQ(4, b_);
-}
-
-TEST_F(single_evaluation_test, system_error_tests) {
-  // successful EXPECT_SYSTEM_ERROR
-  EXPECT_SYSTEM_ERROR(
-      {  // NOLINT
-        a_++;
-        throw_system_error();
-      },
-      EDOM, (b_++, "test"));
-  EXPECT_EQ(1, a_);
-  EXPECT_EQ(1, b_);
-
-  // failed EXPECT_SYSTEM_ERROR, throws different type
-  EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(
-                              {  // NOLINT
-                                a_++;
-                                throw_exception();
-                              },
-                              EDOM, (b_++, "test")),
-                          "throws a different type");
-  EXPECT_EQ(2, a_);
-  EXPECT_EQ(2, b_);
-
-  // failed EXPECT_SYSTEM_ERROR, throws an exception with different message
-  EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(
-                              {  // NOLINT
-                                a_++;
-                                throw_system_error();
-                              },
-                              EDOM, (b_++, "other")),
-                          "throws an exception with a different message");
-  EXPECT_EQ(3, a_);
-  EXPECT_EQ(3, b_);
-
-  // failed EXPECT_SYSTEM_ERROR, throws nothing
-  EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(a_++, EDOM, (b_++, "test")),
-                          "throws nothing");
-  EXPECT_EQ(4, a_);
-  EXPECT_EQ(4, b_);
-}
-
-#if FMT_USE_FCNTL
-// Tests that when EXPECT_WRITE fails, it evaluates its message argument
-// exactly once.
-TEST_F(single_evaluation_test, failed_expect_write) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_WRITE(stdout, std::printf("test"), p_++),
-                          "01234");
-  EXPECT_EQ(s_ + 1, p_);
-}
-
-// Tests that assertion arguments are evaluated exactly once.
-TEST_F(single_evaluation_test, write_tests) {
-  // successful EXPECT_WRITE
-  EXPECT_WRITE(
-      stdout,
-      {  // NOLINT
-        a_++;
-        std::printf("test");
-      },
-      (b_++, "test"));
-  EXPECT_EQ(1, a_);
-  EXPECT_EQ(1, b_);
-
-  // failed EXPECT_WRITE
-  EXPECT_NONFATAL_FAILURE(EXPECT_WRITE(
-                              stdout,
-                              {  // NOLINT
-                                a_++;
-                                std::printf("test");
-                              },
-                              (b_++, "other")),
-                          "Actual: test");
-  EXPECT_EQ(2, a_);
-  EXPECT_EQ(2, b_);
-}
-
-// Tests EXPECT_WRITE.
-TEST(gtest_extra_test, expect_write) {
-  EXPECT_WRITE(stdout, do_nothing(), "");
-  EXPECT_WRITE(stdout, std::printf("test"), "test");
-  EXPECT_WRITE(stderr, std::fprintf(stderr, "test"), "test");
-  EXPECT_NONFATAL_FAILURE(EXPECT_WRITE(stdout, std::printf("that"), "this"),
-                          "Expected: this\n"
-                          "  Actual: that");
-}
-
-TEST(gtest_extra_test, expect_write_streaming) {
-  EXPECT_WRITE(stdout, std::printf("test"), "test") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_WRITE(stdout, std::printf("test"), "other")
-                              << "expected failure",
-                          "expected failure");
-}
-#endif  // FMT_USE_FCNTL
-
-// Tests that the compiler will not complain about unreachable code in the
-// EXPECT_THROW_MSG macro.
-TEST(gtest_extra_test, expect_throw_no_unreachable_code_warning) {
-  int n = 0;
-  using std::runtime_error;
-  EXPECT_THROW_MSG(throw runtime_error(""), runtime_error, "");
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(n++, runtime_error, ""), "");
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW_MSG(throw 1, runtime_error, ""), "");
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_THROW_MSG(throw runtime_error("a"), runtime_error, "b"), "");
-}
-
-// Tests that the compiler will not complain about unreachable code in the
-// EXPECT_SYSTEM_ERROR macro.
-TEST(gtest_extra_test, expect_system_error_no_unreachable_code_warning) {
-  int n = 0;
-  EXPECT_SYSTEM_ERROR(throw fmt::system_error(EDOM, "test"), EDOM, "test");
-  EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(n++, EDOM, ""), "");
-  EXPECT_NONFATAL_FAILURE(EXPECT_SYSTEM_ERROR(throw 1, EDOM, ""), "");
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_SYSTEM_ERROR(throw fmt::system_error(EDOM, "aaa"), EDOM, "bbb"),
-      "");
-}
-
-TEST(gtest_extra_test, expect_throw_behaves_like_single_statement) {
-  if (::testing::internal::AlwaysFalse())
-    EXPECT_THROW_MSG(do_nothing(), std::exception, "");
-
-  if (::testing::internal::AlwaysTrue())
-    EXPECT_THROW_MSG(throw_exception(), std::exception, "test");
-  else
-    do_nothing();
-}
-
-TEST(gtest_extra_test, expect_system_error_behaves_like_single_statement) {
-  if (::testing::internal::AlwaysFalse())
-    EXPECT_SYSTEM_ERROR(do_nothing(), EDOM, "");
-
-  if (::testing::internal::AlwaysTrue())
-    EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "test");
-  else
-    do_nothing();
-}
-
-TEST(gtest_extra_test, expect_write_behaves_like_single_statement) {
-  if (::testing::internal::AlwaysFalse())
-    EXPECT_WRITE(stdout, std::printf("x"), "x");
-
-  if (::testing::internal::AlwaysTrue())
-    EXPECT_WRITE(stdout, std::printf("x"), "x");
-  else
-    do_nothing();
-}
-
-// Tests EXPECT_THROW_MSG.
-TEST(gtest_extra_test, expect_throw_msg) {
-  EXPECT_THROW_MSG(throw_exception(), std::exception, "test");
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_THROW_MSG(throw_exception(), std::logic_error, "test"),
-      "Expected: throw_exception() throws an exception of "
-      "type std::logic_error.\n  Actual: it throws a different type.");
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_THROW_MSG(do_nothing(), std::exception, "test"),
-      "Expected: do_nothing() throws an exception of type std::exception.\n"
-      "  Actual: it throws nothing.");
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_THROW_MSG(throw_exception(), std::exception, "other"),
-      "throw_exception() throws an exception with a different message.\n"
-      "Expected: other\n"
-      "  Actual: test");
-}
-
-// Tests EXPECT_SYSTEM_ERROR.
-TEST(gtest_extra_test, expect_system_error) {
-  EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "test");
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_SYSTEM_ERROR(throw_exception(), EDOM, "test"),
-      "Expected: throw_exception() throws an exception of "
-      "type std::system_error.\n  Actual: it throws a different type.");
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_SYSTEM_ERROR(do_nothing(), EDOM, "test"),
-      "Expected: do_nothing() throws an exception of type std::system_error.\n"
-      "  Actual: it throws nothing.");
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "other"),
-      fmt::format(
-          "throw_system_error() throws an exception with a different message.\n"
-          "Expected: {}\n"
-          "  Actual: {}",
-          system_error_message(EDOM, "other"),
-          system_error_message(EDOM, "test")));
-}
-
-TEST(gtest_extra_test, expect_throw_msg_streaming) {
-  EXPECT_THROW_MSG(throw_exception(), std::exception, "test")
-      << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_THROW_MSG(throw_exception(), std::exception, "other")
-          << "expected failure",
-      "expected failure");
-}
-
-TEST(gtest_extra_test, expect_system_error_streaming) {
-  EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "test")
-      << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_SYSTEM_ERROR(throw_system_error(), EDOM, "other")
-          << "expected failure",
-      "expected failure");
-}
-
-#if FMT_USE_FCNTL
-
-using fmt::buffered_file;
-using fmt::file;
-
-TEST(output_redirect_test, scoped_redirect) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  {
-    buffered_file file(write_end.fdopen("w"));
-    std::fprintf(file.get(), "[[[");
-    {
-      output_redirect redir(file.get());
-      std::fprintf(file.get(), "censored");
-    }
-    std::fprintf(file.get(), "]]]");
-  }
-  EXPECT_READ(read_end, "[[[]]]");
-}
-
-// Test that output_redirect handles errors in flush correctly.
-TEST(output_redirect_test, flush_error_in_ctor) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  int write_fd = write_end.descriptor();
-  file write_copy = write_end.dup(write_fd);
-  buffered_file f = write_end.fdopen("w");
-  // Put a character in a file buffer.
-  EXPECT_EQ('x', fputc('x', f.get()));
-  FMT_POSIX(close(write_fd));
-  std::unique_ptr<output_redirect> redir{nullptr};
-  EXPECT_SYSTEM_ERROR_NOASSERT(redir.reset(new output_redirect(f.get())), EBADF,
-                               "cannot flush stream");
-  redir.reset(nullptr);
-  write_copy.dup2(write_fd);  // "undo" close or dtor will fail
-}
-
-TEST(output_redirect_test, dup_error_in_ctor) {
-  buffered_file f = open_buffered_file();
-  int fd = (f.fileno)();
-  file copy = file::dup(fd);
-  FMT_POSIX(close(fd));
-  std::unique_ptr<output_redirect> redir{nullptr};
-  EXPECT_SYSTEM_ERROR_NOASSERT(
-      redir.reset(new output_redirect(f.get())), EBADF,
-      fmt::format("cannot duplicate file descriptor {}", fd));
-  copy.dup2(fd);  // "undo" close or dtor will fail
-}
-
-TEST(output_redirect_test, restore_and_read) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  buffered_file file(write_end.fdopen("w"));
-  std::fprintf(file.get(), "[[[");
-  output_redirect redir(file.get());
-  std::fprintf(file.get(), "censored");
-  EXPECT_EQ("censored", redir.restore_and_read());
-  EXPECT_EQ("", redir.restore_and_read());
-  std::fprintf(file.get(), "]]]");
-  file = buffered_file();
-  EXPECT_READ(read_end, "[[[]]]");
-}
-
-// Test that OutputRedirect handles errors in flush correctly.
-TEST(output_redirect_test, flush_error_in_restore_and_read) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  int write_fd = write_end.descriptor();
-  file write_copy = write_end.dup(write_fd);
-  buffered_file f = write_end.fdopen("w");
-  output_redirect redir(f.get());
-  // Put a character in a file buffer.
-  EXPECT_EQ('x', fputc('x', f.get()));
-  FMT_POSIX(close(write_fd));
-  EXPECT_SYSTEM_ERROR_NOASSERT(redir.restore_and_read(), EBADF,
-                               "cannot flush stream");
-  write_copy.dup2(write_fd);  // "undo" close or dtor will fail
-}
-
-TEST(output_redirect_test, error_in_dtor) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  int write_fd = write_end.descriptor();
-  file write_copy = write_end.dup(write_fd);
-  buffered_file f = write_end.fdopen("w");
-  std::unique_ptr<output_redirect> redir(new output_redirect(f.get()));
-  // Put a character in a file buffer.
-  EXPECT_EQ('x', fputc('x', f.get()));
-  EXPECT_WRITE(
-      stderr,
-      {
-        // The close function must be called inside EXPECT_WRITE,
-        // otherwise the system may recycle closed file descriptor when
-        // redirecting the output in EXPECT_STDERR and the second close
-        // will break output redirection.
-        FMT_POSIX(close(write_fd));
-        SUPPRESS_ASSERT(redir.reset(nullptr));
-      },
-      system_error_message(EBADF, "cannot flush stream"));
-  write_copy.dup2(write_fd);  // "undo" close or dtor of buffered_file will fail
-}
-
-#endif  // FMT_USE_FCNTL
diff --git a/3rdparty/fmt/test/gtest-extra.cc b/3rdparty/fmt/test/gtest-extra.cc
deleted file mode 100644
index 1d48a173..00000000
--- a/3rdparty/fmt/test/gtest-extra.cc
+++ /dev/null
@@ -1,80 +0,0 @@
-// Formatting library for C++ - custom Google Test assertions
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "gtest-extra.h"
-
-#if FMT_USE_FCNTL
-
-using fmt::file;
-
-output_redirect::output_redirect(FILE* f) : file_(f) {
-  flush();
-  int fd = FMT_POSIX(fileno(f));
-  // Create a file object referring to the original file.
-  original_ = file::dup(fd);
-  // Create a pipe.
-  file write_end;
-  file::pipe(read_end_, write_end);
-  // Connect the passed FILE object to the write end of the pipe.
-  write_end.dup2(fd);
-}
-
-output_redirect::~output_redirect() FMT_NOEXCEPT {
-  try {
-    restore();
-  } catch (const std::exception& e) {
-    std::fputs(e.what(), stderr);
-  }
-}
-
-void output_redirect::flush() {
-  int result = 0;
-  do {
-    result = fflush(file_);
-  } while (result == EOF && errno == EINTR);
-  if (result != 0) throw fmt::system_error(errno, "cannot flush stream");
-}
-
-void output_redirect::restore() {
-  if (original_.descriptor() == -1) return;  // Already restored.
-  flush();
-  // Restore the original file.
-  original_.dup2(FMT_POSIX(fileno(file_)));
-  original_.close();
-}
-
-std::string output_redirect::restore_and_read() {
-  // Restore output.
-  restore();
-
-  // Read everything from the pipe.
-  std::string content;
-  if (read_end_.descriptor() == -1) return content;  // Already read.
-  enum { BUFFER_SIZE = 4096 };
-  char buffer[BUFFER_SIZE];
-  size_t count = 0;
-  do {
-    count = read_end_.read(buffer, BUFFER_SIZE);
-    content.append(buffer, count);
-  } while (count != 0);
-  read_end_.close();
-  return content;
-}
-
-std::string read(file& f, size_t count) {
-  std::string buffer(count, '\0');
-  size_t n = 0, offset = 0;
-  do {
-    n = f.read(&buffer[offset], count - offset);
-    // We can't read more than size_t bytes since count has type size_t.
-    offset += n;
-  } while (offset < count && n != 0);
-  buffer.resize(offset);
-  return buffer;
-}
-
-#endif  // FMT_USE_FCNTL
diff --git a/3rdparty/fmt/test/gtest-extra.h b/3rdparty/fmt/test/gtest-extra.h
deleted file mode 100644
index df2b1d8c..00000000
--- a/3rdparty/fmt/test/gtest-extra.h
+++ /dev/null
@@ -1,170 +0,0 @@
-// Formatting library for C++ - custom Google Test assertions
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_GTEST_EXTRA_H_
-#define FMT_GTEST_EXTRA_H_
-
-#include <stdlib.h>  // _invalid_parameter_handler
-
-#include <string>
-
-#ifdef FMT_MODULE_TEST
-import fmt;
-#else
-#  include "fmt/os.h"
-#endif  // FMG_MODULE_TEST
-
-#include "gmock/gmock.h"
-
-#define FMT_TEST_THROW_(statement, expected_exception, expected_message, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                                \
-  if (::testing::AssertionResult gtest_ar = ::testing::AssertionSuccess()) {   \
-    std::string gtest_expected_message = expected_message;                     \
-    bool gtest_caught_expected = false;                                        \
-    try {                                                                      \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement);               \
-    } catch (expected_exception const& e) {                                    \
-      if (gtest_expected_message != e.what()) {                                \
-        gtest_ar << #statement                                                 \
-            " throws an exception with a different message.\n"                 \
-                 << "Expected: " << gtest_expected_message << "\n"             \
-                 << "  Actual: " << e.what();                                  \
-        goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);            \
-      }                                                                        \
-      gtest_caught_expected = true;                                            \
-    } catch (...) {                                                            \
-      gtest_ar << "Expected: " #statement                                      \
-                  " throws an exception of type " #expected_exception          \
-                  ".\n  Actual: it throws a different type.";                  \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);              \
-    }                                                                          \
-    if (!gtest_caught_expected) {                                              \
-      gtest_ar << "Expected: " #statement                                      \
-                  " throws an exception of type " #expected_exception          \
-                  ".\n  Actual: it throws nothing.";                           \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);              \
-    }                                                                          \
-  } else                                                                       \
-    GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__)                      \
-        : fail(gtest_ar.failure_message())
-
-// Tests that the statement throws the expected exception and the exception's
-// what() method returns expected message.
-#define EXPECT_THROW_MSG(statement, expected_exception, expected_message) \
-  FMT_TEST_THROW_(statement, expected_exception, expected_message,        \
-                  GTEST_NONFATAL_FAILURE_)
-
-inline std::string system_error_message(int error_code,
-                                        const std::string& message) {
-  auto ec = std::error_code(error_code, std::generic_category());
-  return std::system_error(ec, message).what();
-}
-
-#define EXPECT_SYSTEM_ERROR(statement, error_code, message) \
-  EXPECT_THROW_MSG(statement, std::system_error,            \
-                   system_error_message(error_code, message))
-
-#if FMT_USE_FCNTL
-
-// Captures file output by redirecting it to a pipe.
-// The output it can handle is limited by the pipe capacity.
-class output_redirect {
- private:
-  FILE* file_;
-  fmt::file original_;  // Original file passed to redirector.
-  fmt::file read_end_;  // Read end of the pipe where the output is redirected.
-
-  void flush();
-  void restore();
-
- public:
-  explicit output_redirect(FILE* file);
-  ~output_redirect() FMT_NOEXCEPT;
-
-  output_redirect(const output_redirect&) = delete;
-  void operator=(const output_redirect&) = delete;
-
-  // Restores the original file, reads output from the pipe into a string
-  // and returns it.
-  std::string restore_and_read();
-};
-
-#  define FMT_TEST_WRITE_(statement, expected_output, file, fail)              \
-    GTEST_AMBIGUOUS_ELSE_BLOCKER_                                              \
-    if (::testing::AssertionResult gtest_ar = ::testing::AssertionSuccess()) { \
-      std::string gtest_expected_output = expected_output;                     \
-      output_redirect gtest_redir(file);                                       \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement);               \
-      std::string gtest_output = gtest_redir.restore_and_read();               \
-      if (gtest_output != gtest_expected_output) {                             \
-        gtest_ar << #statement " produces different output.\n"                 \
-                 << "Expected: " << gtest_expected_output << "\n"              \
-                 << "  Actual: " << gtest_output;                              \
-        goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);            \
-      }                                                                        \
-    } else                                                                     \
-      GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__)                    \
-          : fail(gtest_ar.failure_message())
-
-// Tests that the statement writes the expected output to file.
-#  define EXPECT_WRITE(file, statement, expected_output) \
-    FMT_TEST_WRITE_(statement, expected_output, file, GTEST_NONFATAL_FAILURE_)
-
-#  ifdef _MSC_VER
-
-// Suppresses Windows assertions on invalid file descriptors, making
-// POSIX functions return proper error codes instead of crashing on Windows.
-class suppress_assert {
- private:
-  _invalid_parameter_handler original_handler_;
-  int original_report_mode_;
-
-  static void handle_invalid_parameter(const wchar_t*, const wchar_t*,
-                                       const wchar_t*, unsigned, uintptr_t) {}
-
- public:
-  suppress_assert()
-      : original_handler_(
-            _set_invalid_parameter_handler(handle_invalid_parameter)),
-        original_report_mode_(_CrtSetReportMode(_CRT_ASSERT, 0)) {}
-  ~suppress_assert() {
-    _set_invalid_parameter_handler(original_handler_);
-    _CrtSetReportMode(_CRT_ASSERT, original_report_mode_);
-    (void)original_report_mode_;
-  }
-};
-
-#    define SUPPRESS_ASSERT(statement) \
-      {                                \
-        suppress_assert sa;            \
-        statement;                     \
-      }
-#  else
-#    define SUPPRESS_ASSERT(statement) statement
-#  endif  // _MSC_VER
-
-#  define EXPECT_SYSTEM_ERROR_NOASSERT(statement, error_code, message) \
-    EXPECT_SYSTEM_ERROR(SUPPRESS_ASSERT(statement), error_code, message)
-
-// Attempts to read count characters from a file.
-std::string read(fmt::file& f, size_t count);
-
-#  define EXPECT_READ(file, expected_content) \
-    EXPECT_EQ(expected_content,               \
-              read(file, fmt::string_view(expected_content).size()))
-
-#else
-#  define EXPECT_WRITE(file, statement, expected_output) \
-    do {                                                 \
-      (void)(file);                                      \
-      (void)(statement);                                 \
-      (void)(expected_output);                           \
-      SUCCEED();                                         \
-    } while (false)
-#endif  // FMT_USE_FCNTL
-
-#endif  // FMT_GTEST_EXTRA_H_
diff --git a/3rdparty/fmt/test/gtest/.clang-format b/3rdparty/fmt/test/gtest/.clang-format
deleted file mode 100644
index ec09b9b6..00000000
--- a/3rdparty/fmt/test/gtest/.clang-format
+++ /dev/null
@@ -1,3 +0,0 @@
-# Disable clang-format here
-DisableFormat: true
-SortIncludes: Never
diff --git a/3rdparty/fmt/test/gtest/CMakeLists.txt b/3rdparty/fmt/test/gtest/CMakeLists.txt
deleted file mode 100644
index 0cc4e1aa..00000000
--- a/3rdparty/fmt/test/gtest/CMakeLists.txt
+++ /dev/null
@@ -1,38 +0,0 @@
-#------------------------------------------------------------------------------
-# Build the google test library
-
-# We compile Google Test ourselves instead of using pre-compiled libraries.
-# See the Google Test FAQ "Why is it not recommended to install a
-# pre-compiled copy of Google Test (for example, into /usr/local)?"
-# at http://code.google.com/p/googletest/wiki/FAQ for more details.
-add_library(gtest STATIC
-  gmock-gtest-all.cc gmock/gmock.h gtest/gtest.h gtest/gtest-spi.h)
-target_compile_definitions(gtest PUBLIC GTEST_HAS_STD_WSTRING=1)
-target_include_directories(gtest SYSTEM PUBLIC .)
-
-find_package(Threads)
-if (Threads_FOUND)
-  target_link_libraries(gtest ${CMAKE_THREAD_LIBS_INIT})
-else ()
-  target_compile_definitions(gtest PUBLIC GTEST_HAS_PTHREAD=0)
-endif ()
-
-# Workaround GTest bug https://github.com/google/googletest/issues/705.
-check_cxx_compiler_flag(
-  -fno-delete-null-pointer-checks HAVE_FNO_DELETE_NULL_POINTER_CHECKS)
-if (HAVE_FNO_DELETE_NULL_POINTER_CHECKS)
-  target_compile_options(gtest PUBLIC -fno-delete-null-pointer-checks)
-endif ()
-
-if (MSVC)
-  # Disable MSVC warnings of _CRT_INSECURE_DEPRECATE functions.
-  target_compile_definitions(gtest PRIVATE _CRT_SECURE_NO_WARNINGS)
-  if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-    # Disable MSVC warnings of POSIX functions.
-    target_compile_options(gtest PUBLIC -Wno-deprecated-declarations)
-  endif ()
-endif ()
-
-# Silence MSVC tr1 deprecation warning in gmock.
-target_compile_definitions(gtest
-  PUBLIC _SILENCE_TR1_NAMESPACE_DEPRECATION_WARNING=1)
diff --git a/3rdparty/fmt/test/gtest/gmock-gtest-all.cc b/3rdparty/fmt/test/gtest/gmock-gtest-all.cc
deleted file mode 100644
index b67316c3..00000000
--- a/3rdparty/fmt/test/gtest/gmock-gtest-all.cc
+++ /dev/null
@@ -1,14434 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Google C++ Testing and Mocking Framework (Google Test)
-//
-// Sometimes it's desirable to build Google Test by compiling a single file.
-// This file serves this purpose.
-
-// This line ensures that gtest.h can be compiled on its own, even
-// when it's fused.
-#include "gtest/gtest.h"
-
-// The following lines pull in the real gtest *.cc files.
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Utilities for testing Google Test itself and code that uses Google Test
-// (e.g. frameworks built on top of Google Test).
-
-// GOOGLETEST_CM0004 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
-
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// This helper class can be used to mock out Google Test failure reporting
-// so that we can test Google Test or code that builds on Google Test.
-//
-// An object of this class appends a TestPartResult object to the
-// TestPartResultArray object given in the constructor whenever a Google Test
-// failure is reported. It can either intercept only failures that are
-// generated in the same thread that created this object or it can intercept
-// all generated failures. The scope of this mock object can be controlled with
-// the second argument to the two arguments constructor.
-class GTEST_API_ ScopedFakeTestPartResultReporter
-    : public TestPartResultReporterInterface {
- public:
-  // The two possible mocking modes of this object.
-  enum InterceptMode {
-    INTERCEPT_ONLY_CURRENT_THREAD,  // Intercepts only thread local failures.
-    INTERCEPT_ALL_THREADS           // Intercepts all failures.
-  };
-
-  // The c'tor sets this object as the test part result reporter used
-  // by Google Test.  The 'result' parameter specifies where to report the
-  // results. This reporter will only catch failures generated in the current
-  // thread. DEPRECATED
-  explicit ScopedFakeTestPartResultReporter(TestPartResultArray* result);
-
-  // Same as above, but you can choose the interception scope of this object.
-  ScopedFakeTestPartResultReporter(InterceptMode intercept_mode,
-                                   TestPartResultArray* result);
-
-  // The d'tor restores the previous test part result reporter.
-  ~ScopedFakeTestPartResultReporter() override;
-
-  // Appends the TestPartResult object to the TestPartResultArray
-  // received in the constructor.
-  //
-  // This method is from the TestPartResultReporterInterface
-  // interface.
-  void ReportTestPartResult(const TestPartResult& result) override;
-
- private:
-  void Init();
-
-  const InterceptMode intercept_mode_;
-  TestPartResultReporterInterface* old_reporter_;
-  TestPartResultArray* const result_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedFakeTestPartResultReporter);
-};
-
-namespace internal {
-
-// A helper class for implementing EXPECT_FATAL_FAILURE() and
-// EXPECT_NONFATAL_FAILURE().  Its destructor verifies that the given
-// TestPartResultArray contains exactly one failure that has the given
-// type and contains the given substring.  If that's not the case, a
-// non-fatal failure will be generated.
-class GTEST_API_ SingleFailureChecker {
- public:
-  // The constructor remembers the arguments.
-  SingleFailureChecker(const TestPartResultArray* results,
-                       TestPartResult::Type type, const std::string& substr);
-  ~SingleFailureChecker();
- private:
-  const TestPartResultArray* const results_;
-  const TestPartResult::Type type_;
-  const std::string substr_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(SingleFailureChecker);
-};
-
-}  // namespace internal
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// A set of macros for testing Google Test assertions or code that's expected
-// to generate Google Test fatal failures.  It verifies that the given
-// statement will cause exactly one fatal Google Test failure with 'substr'
-// being part of the failure message.
-//
-// There are two different versions of this macro. EXPECT_FATAL_FAILURE only
-// affects and considers failures generated in the current thread and
-// EXPECT_FATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
-//
-// The verification of the assertion is done correctly even when the statement
-// throws an exception or aborts the current function.
-//
-// Known restrictions:
-//   - 'statement' cannot reference local non-static variables or
-//     non-static members of the current object.
-//   - 'statement' cannot return a value.
-//   - You cannot stream a failure message to this macro.
-//
-// Note that even though the implementations of the following two
-// macros are much alike, we cannot refactor them to use a common
-// helper macro, due to some peculiarity in how the preprocessor
-// works.  The AcceptsMacroThatExpandsToUnprotectedComma test in
-// gtest_unittest.cc will fail to compile if we do that.
-#define EXPECT_FATAL_FAILURE(statement, substr) \
-  do { \
-    class GTestExpectFatalFailureHelper {\
-     public:\
-      static void Execute() { statement; }\
-    };\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
-      GTestExpectFatalFailureHelper::Execute();\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#define EXPECT_FATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
-  do { \
-    class GTestExpectFatalFailureHelper {\
-     public:\
-      static void Execute() { statement; }\
-    };\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ALL_THREADS, &gtest_failures);\
-      GTestExpectFatalFailureHelper::Execute();\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-// A macro for testing Google Test assertions or code that's expected to
-// generate Google Test non-fatal failures.  It asserts that the given
-// statement will cause exactly one non-fatal Google Test failure with 'substr'
-// being part of the failure message.
-//
-// There are two different versions of this macro. EXPECT_NONFATAL_FAILURE only
-// affects and considers failures generated in the current thread and
-// EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
-//
-// 'statement' is allowed to reference local variables and members of
-// the current object.
-//
-// The verification of the assertion is done correctly even when the statement
-// throws an exception or aborts the current function.
-//
-// Known restrictions:
-//   - You cannot stream a failure message to this macro.
-//
-// Note that even though the implementations of the following two
-// macros are much alike, we cannot refactor them to use a common
-// helper macro, due to some peculiarity in how the preprocessor
-// works.  If we do that, the code won't compile when the user gives
-// EXPECT_NONFATAL_FAILURE() a statement that contains a macro that
-// expands to code containing an unprotected comma.  The
-// AcceptsMacroThatExpandsToUnprotectedComma test in gtest_unittest.cc
-// catches that.
-//
-// For the same reason, we have to write
-//   if (::testing::internal::AlwaysTrue()) { statement; }
-// instead of
-//   GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
-// to avoid an MSVC warning on unreachable code.
-#define EXPECT_NONFATAL_FAILURE(statement, substr) \
-  do {\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
-        (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
-      if (::testing::internal::AlwaysTrue()) { statement; }\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#define EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
-  do {\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
-        (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter::INTERCEPT_ALL_THREADS, \
-          &gtest_failures);\
-      if (::testing::internal::AlwaysTrue()) { statement; }\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
-
-#include <ctype.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <time.h>
-#include <wchar.h>
-#include <wctype.h>
-
-#include <algorithm>
-#include <chrono>  // NOLINT
-#include <cmath>
-#include <cstdint>
-#include <iomanip>
-#include <limits>
-#include <list>
-#include <map>
-#include <ostream>  // NOLINT
-#include <sstream>
-#include <vector>
-
-#if GTEST_OS_LINUX
-
-# include <fcntl.h>  // NOLINT
-# include <limits.h>  // NOLINT
-# include <sched.h>  // NOLINT
-// Declares vsnprintf().  This header is not available on Windows.
-# include <strings.h>  // NOLINT
-# include <sys/mman.h>  // NOLINT
-# include <sys/time.h>  // NOLINT
-# include <unistd.h>  // NOLINT
-# include <string>
-
-#elif GTEST_OS_ZOS
-# include <sys/time.h>  // NOLINT
-
-// On z/OS we additionally need strings.h for strcasecmp.
-# include <strings.h>  // NOLINT
-
-#elif GTEST_OS_WINDOWS_MOBILE  // We are on Windows CE.
-
-# include <windows.h>  // NOLINT
-# undef min
-
-#elif GTEST_OS_WINDOWS  // We are on Windows proper.
-
-# include <windows.h>  // NOLINT
-# undef min
-
-#ifdef _MSC_VER
-# include <crtdbg.h>  // NOLINT
-#endif
-
-# include <io.h>  // NOLINT
-# include <sys/timeb.h>  // NOLINT
-# include <sys/types.h>  // NOLINT
-# include <sys/stat.h>  // NOLINT
-
-# if GTEST_OS_WINDOWS_MINGW
-#  include <sys/time.h>  // NOLINT
-# endif  // GTEST_OS_WINDOWS_MINGW
-
-#else
-
-// cpplint thinks that the header is already included, so we want to
-// silence it.
-# include <sys/time.h>  // NOLINT
-# include <unistd.h>  // NOLINT
-
-#endif  // GTEST_OS_LINUX
-
-#if GTEST_HAS_EXCEPTIONS
-# include <stdexcept>
-#endif
-
-#if GTEST_CAN_STREAM_RESULTS_
-# include <arpa/inet.h>  // NOLINT
-# include <netdb.h>  // NOLINT
-# include <sys/socket.h>  // NOLINT
-# include <sys/types.h>  // NOLINT
-#endif
-
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Utility functions and classes used by the Google C++ testing framework.//
-// This file contains purely Google Test's internal implementation.  Please
-// DO NOT #INCLUDE IT IN A USER PROGRAM.
-
-#ifndef GOOGLETEST_SRC_GTEST_INTERNAL_INL_H_
-#define GOOGLETEST_SRC_GTEST_INTERNAL_INL_H_
-
-#ifndef _WIN32_WCE
-# include <errno.h>
-#endif  // !_WIN32_WCE
-#include <stddef.h>
-#include <stdlib.h>  // For strtoll/_strtoul64/malloc/free.
-#include <string.h>  // For memmove.
-
-#include <algorithm>
-#include <cstdint>
-#include <memory>
-#include <string>
-#include <vector>
-
-
-#if GTEST_CAN_STREAM_RESULTS_
-# include <arpa/inet.h>  // NOLINT
-# include <netdb.h>  // NOLINT
-#endif
-
-#if GTEST_OS_WINDOWS
-# include <windows.h>  // NOLINT
-#endif  // GTEST_OS_WINDOWS
-
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// Declares the flags.
-//
-// We don't want the users to modify this flag in the code, but want
-// Google Test's own unit tests to be able to access it. Therefore we
-// declare it here as opposed to in gtest.h.
-GTEST_DECLARE_bool_(death_test_use_fork);
-
-namespace internal {
-
-// The value of GetTestTypeId() as seen from within the Google Test
-// library.  This is solely for testing GetTestTypeId().
-GTEST_API_ extern const TypeId kTestTypeIdInGoogleTest;
-
-// Names of the flags (needed for parsing Google Test flags).
-const char kAlsoRunDisabledTestsFlag[] = "also_run_disabled_tests";
-const char kBreakOnFailureFlag[] = "break_on_failure";
-const char kCatchExceptionsFlag[] = "catch_exceptions";
-const char kColorFlag[] = "color";
-const char kFailFast[] = "fail_fast";
-const char kFilterFlag[] = "filter";
-const char kListTestsFlag[] = "list_tests";
-const char kOutputFlag[] = "output";
-const char kBriefFlag[] = "brief";
-const char kPrintTimeFlag[] = "print_time";
-const char kPrintUTF8Flag[] = "print_utf8";
-const char kRandomSeedFlag[] = "random_seed";
-const char kRepeatFlag[] = "repeat";
-const char kShuffleFlag[] = "shuffle";
-const char kStackTraceDepthFlag[] = "stack_trace_depth";
-const char kStreamResultToFlag[] = "stream_result_to";
-const char kThrowOnFailureFlag[] = "throw_on_failure";
-const char kFlagfileFlag[] = "flagfile";
-
-// A valid random seed must be in [1, kMaxRandomSeed].
-const int kMaxRandomSeed = 99999;
-
-// g_help_flag is true if and only if the --help flag or an equivalent form
-// is specified on the command line.
-GTEST_API_ extern bool g_help_flag;
-
-// Returns the current time in milliseconds.
-GTEST_API_ TimeInMillis GetTimeInMillis();
-
-// Returns true if and only if Google Test should use colors in the output.
-GTEST_API_ bool ShouldUseColor(bool stdout_is_tty);
-
-// Formats the given time in milliseconds as seconds.
-GTEST_API_ std::string FormatTimeInMillisAsSeconds(TimeInMillis ms);
-
-// Converts the given time in milliseconds to a date string in the ISO 8601
-// format, without the timezone information.  N.B.: due to the use the
-// non-reentrant localtime() function, this function is not thread safe.  Do
-// not use it in any code that can be called from multiple threads.
-GTEST_API_ std::string FormatEpochTimeInMillisAsIso8601(TimeInMillis ms);
-
-// Parses a string for an Int32 flag, in the form of "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-GTEST_API_ bool ParseInt32Flag(
-    const char* str, const char* flag, int32_t* value);
-
-// Returns a random seed in range [1, kMaxRandomSeed] based on the
-// given --gtest_random_seed flag value.
-inline int GetRandomSeedFromFlag(int32_t random_seed_flag) {
-  const unsigned int raw_seed = (random_seed_flag == 0) ?
-      static_cast<unsigned int>(GetTimeInMillis()) :
-      static_cast<unsigned int>(random_seed_flag);
-
-  // Normalizes the actual seed to range [1, kMaxRandomSeed] such that
-  // it's easy to type.
-  const int normalized_seed =
-      static_cast<int>((raw_seed - 1U) %
-                       static_cast<unsigned int>(kMaxRandomSeed)) + 1;
-  return normalized_seed;
-}
-
-// Returns the first valid random seed after 'seed'.  The behavior is
-// undefined if 'seed' is invalid.  The seed after kMaxRandomSeed is
-// considered to be 1.
-inline int GetNextRandomSeed(int seed) {
-  GTEST_CHECK_(1 <= seed && seed <= kMaxRandomSeed)
-      << "Invalid random seed " << seed << " - must be in [1, "
-      << kMaxRandomSeed << "].";
-  const int next_seed = seed + 1;
-  return (next_seed > kMaxRandomSeed) ? 1 : next_seed;
-}
-
-// This class saves the values of all Google Test flags in its c'tor, and
-// restores them in its d'tor.
-class GTestFlagSaver {
- public:
-  // The c'tor.
-  GTestFlagSaver() {
-    also_run_disabled_tests_ = GTEST_FLAG(also_run_disabled_tests);
-    break_on_failure_ = GTEST_FLAG(break_on_failure);
-    catch_exceptions_ = GTEST_FLAG(catch_exceptions);
-    color_ = GTEST_FLAG(color);
-    death_test_style_ = GTEST_FLAG(death_test_style);
-    death_test_use_fork_ = GTEST_FLAG(death_test_use_fork);
-    fail_fast_ = GTEST_FLAG(fail_fast);
-    filter_ = GTEST_FLAG(filter);
-    internal_run_death_test_ = GTEST_FLAG(internal_run_death_test);
-    list_tests_ = GTEST_FLAG(list_tests);
-    output_ = GTEST_FLAG(output);
-    brief_ = GTEST_FLAG(brief);
-    print_time_ = GTEST_FLAG(print_time);
-    print_utf8_ = GTEST_FLAG(print_utf8);
-    random_seed_ = GTEST_FLAG(random_seed);
-    repeat_ = GTEST_FLAG(repeat);
-    shuffle_ = GTEST_FLAG(shuffle);
-    stack_trace_depth_ = GTEST_FLAG(stack_trace_depth);
-    stream_result_to_ = GTEST_FLAG(stream_result_to);
-    throw_on_failure_ = GTEST_FLAG(throw_on_failure);
-  }
-
-  // The d'tor is not virtual.  DO NOT INHERIT FROM THIS CLASS.
-  ~GTestFlagSaver() {
-    GTEST_FLAG(also_run_disabled_tests) = also_run_disabled_tests_;
-    GTEST_FLAG(break_on_failure) = break_on_failure_;
-    GTEST_FLAG(catch_exceptions) = catch_exceptions_;
-    GTEST_FLAG(color) = color_;
-    GTEST_FLAG(death_test_style) = death_test_style_;
-    GTEST_FLAG(death_test_use_fork) = death_test_use_fork_;
-    GTEST_FLAG(filter) = filter_;
-    GTEST_FLAG(fail_fast) = fail_fast_;
-    GTEST_FLAG(internal_run_death_test) = internal_run_death_test_;
-    GTEST_FLAG(list_tests) = list_tests_;
-    GTEST_FLAG(output) = output_;
-    GTEST_FLAG(brief) = brief_;
-    GTEST_FLAG(print_time) = print_time_;
-    GTEST_FLAG(print_utf8) = print_utf8_;
-    GTEST_FLAG(random_seed) = random_seed_;
-    GTEST_FLAG(repeat) = repeat_;
-    GTEST_FLAG(shuffle) = shuffle_;
-    GTEST_FLAG(stack_trace_depth) = stack_trace_depth_;
-    GTEST_FLAG(stream_result_to) = stream_result_to_;
-    GTEST_FLAG(throw_on_failure) = throw_on_failure_;
-  }
-
- private:
-  // Fields for saving the original values of flags.
-  bool also_run_disabled_tests_;
-  bool break_on_failure_;
-  bool catch_exceptions_;
-  std::string color_;
-  std::string death_test_style_;
-  bool death_test_use_fork_;
-  bool fail_fast_;
-  std::string filter_;
-  std::string internal_run_death_test_;
-  bool list_tests_;
-  std::string output_;
-  bool brief_;
-  bool print_time_;
-  bool print_utf8_;
-  int32_t random_seed_;
-  int32_t repeat_;
-  bool shuffle_;
-  int32_t stack_trace_depth_;
-  std::string stream_result_to_;
-  bool throw_on_failure_;
-} GTEST_ATTRIBUTE_UNUSED_;
-
-// Converts a Unicode code point to a narrow string in UTF-8 encoding.
-// code_point parameter is of type UInt32 because wchar_t may not be
-// wide enough to contain a code point.
-// If the code_point is not a valid Unicode code point
-// (i.e. outside of Unicode range U+0 to U+10FFFF) it will be converted
-// to "(Invalid Unicode 0xXXXXXXXX)".
-GTEST_API_ std::string CodePointToUtf8(uint32_t code_point);
-
-// Converts a wide string to a narrow string in UTF-8 encoding.
-// The wide string is assumed to have the following encoding:
-//   UTF-16 if sizeof(wchar_t) == 2 (on Windows, Cygwin)
-//   UTF-32 if sizeof(wchar_t) == 4 (on Linux)
-// Parameter str points to a null-terminated wide string.
-// Parameter num_chars may additionally limit the number
-// of wchar_t characters processed. -1 is used when the entire string
-// should be processed.
-// If the string contains code points that are not valid Unicode code points
-// (i.e. outside of Unicode range U+0 to U+10FFFF) they will be output
-// as '(Invalid Unicode 0xXXXXXXXX)'. If the string is in UTF16 encoding
-// and contains invalid UTF-16 surrogate pairs, values in those pairs
-// will be encoded as individual Unicode characters from Basic Normal Plane.
-GTEST_API_ std::string WideStringToUtf8(const wchar_t* str, int num_chars);
-
-// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
-// if the variable is present. If a file already exists at this location, this
-// function will write over it. If the variable is present, but the file cannot
-// be created, prints an error and exits.
-void WriteToShardStatusFileIfNeeded();
-
-// Checks whether sharding is enabled by examining the relevant
-// environment variable values. If the variables are present,
-// but inconsistent (e.g., shard_index >= total_shards), prints
-// an error and exits. If in_subprocess_for_death_test, sharding is
-// disabled because it must only be applied to the original test
-// process. Otherwise, we could filter out death tests we intended to execute.
-GTEST_API_ bool ShouldShard(const char* total_shards_str,
-                            const char* shard_index_str,
-                            bool in_subprocess_for_death_test);
-
-// Parses the environment variable var as a 32-bit integer. If it is unset,
-// returns default_val. If it is not a 32-bit integer, prints an error and
-// and aborts.
-GTEST_API_ int32_t Int32FromEnvOrDie(const char* env_var, int32_t default_val);
-
-// Given the total number of shards, the shard index, and the test id,
-// returns true if and only if the test should be run on this shard. The test id
-// is some arbitrary but unique non-negative integer assigned to each test
-// method. Assumes that 0 <= shard_index < total_shards.
-GTEST_API_ bool ShouldRunTestOnShard(
-    int total_shards, int shard_index, int test_id);
-
-// STL container utilities.
-
-// Returns the number of elements in the given container that satisfy
-// the given predicate.
-template <class Container, typename Predicate>
-inline int CountIf(const Container& c, Predicate predicate) {
-  // Implemented as an explicit loop since std::count_if() in libCstd on
-  // Solaris has a non-standard signature.
-  int count = 0;
-  for (typename Container::const_iterator it = c.begin(); it != c.end(); ++it) {
-    if (predicate(*it))
-      ++count;
-  }
-  return count;
-}
-
-// Applies a function/functor to each element in the container.
-template <class Container, typename Functor>
-void ForEach(const Container& c, Functor functor) {
-  std::for_each(c.begin(), c.end(), functor);
-}
-
-// Returns the i-th element of the vector, or default_value if i is not
-// in range [0, v.size()).
-template <typename E>
-inline E GetElementOr(const std::vector<E>& v, int i, E default_value) {
-  return (i < 0 || i >= static_cast<int>(v.size())) ? default_value
-                                                    : v[static_cast<size_t>(i)];
-}
-
-// Performs an in-place shuffle of a range of the vector's elements.
-// 'begin' and 'end' are element indices as an STL-style range;
-// i.e. [begin, end) are shuffled, where 'end' == size() means to
-// shuffle to the end of the vector.
-template <typename E>
-void ShuffleRange(internal::Random* random, int begin, int end,
-                  std::vector<E>* v) {
-  const int size = static_cast<int>(v->size());
-  GTEST_CHECK_(0 <= begin && begin <= size)
-      << "Invalid shuffle range start " << begin << ": must be in range [0, "
-      << size << "].";
-  GTEST_CHECK_(begin <= end && end <= size)
-      << "Invalid shuffle range finish " << end << ": must be in range ["
-      << begin << ", " << size << "].";
-
-  // Fisher-Yates shuffle, from
-  // http://en.wikipedia.org/wiki/Fisher-Yates_shuffle
-  for (int range_width = end - begin; range_width >= 2; range_width--) {
-    const int last_in_range = begin + range_width - 1;
-    const int selected =
-        begin +
-        static_cast<int>(random->Generate(static_cast<uint32_t>(range_width)));
-    std::swap((*v)[static_cast<size_t>(selected)],
-              (*v)[static_cast<size_t>(last_in_range)]);
-  }
-}
-
-// Performs an in-place shuffle of the vector's elements.
-template <typename E>
-inline void Shuffle(internal::Random* random, std::vector<E>* v) {
-  ShuffleRange(random, 0, static_cast<int>(v->size()), v);
-}
-
-// A function for deleting an object.  Handy for being used as a
-// functor.
-template <typename T>
-static void Delete(T* x) {
-  delete x;
-}
-
-// A predicate that checks the key of a TestProperty against a known key.
-//
-// TestPropertyKeyIs is copyable.
-class TestPropertyKeyIs {
- public:
-  // Constructor.
-  //
-  // TestPropertyKeyIs has NO default constructor.
-  explicit TestPropertyKeyIs(const std::string& key) : key_(key) {}
-
-  // Returns true if and only if the test name of test property matches on key_.
-  bool operator()(const TestProperty& test_property) const {
-    return test_property.key() == key_;
-  }
-
- private:
-  std::string key_;
-};
-
-// Class UnitTestOptions.
-//
-// This class contains functions for processing options the user
-// specifies when running the tests.  It has only static members.
-//
-// In most cases, the user can specify an option using either an
-// environment variable or a command line flag.  E.g. you can set the
-// test filter using either GTEST_FILTER or --gtest_filter.  If both
-// the variable and the flag are present, the latter overrides the
-// former.
-class GTEST_API_ UnitTestOptions {
- public:
-  // Functions for processing the gtest_output flag.
-
-  // Returns the output format, or "" for normal printed output.
-  static std::string GetOutputFormat();
-
-  // Returns the absolute path of the requested output file, or the
-  // default (test_detail.xml in the original working directory) if
-  // none was explicitly specified.
-  static std::string GetAbsolutePathToOutputFile();
-
-  // Functions for processing the gtest_filter flag.
-
-  // Returns true if and only if the user-specified filter matches the test
-  // suite name and the test name.
-  static bool FilterMatchesTest(const std::string& test_suite_name,
-                                const std::string& test_name);
-
-#if GTEST_OS_WINDOWS
-  // Function for supporting the gtest_catch_exception flag.
-
-  // Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
-  // given SEH exception, or EXCEPTION_CONTINUE_SEARCH otherwise.
-  // This function is useful as an __except condition.
-  static int GTestShouldProcessSEH(DWORD exception_code);
-#endif  // GTEST_OS_WINDOWS
-
-  // Returns true if "name" matches the ':' separated list of glob-style
-  // filters in "filter".
-  static bool MatchesFilter(const std::string& name, const char* filter);
-};
-
-// Returns the current application's name, removing directory path if that
-// is present.  Used by UnitTestOptions::GetOutputFile.
-GTEST_API_ FilePath GetCurrentExecutableName();
-
-// The role interface for getting the OS stack trace as a string.
-class OsStackTraceGetterInterface {
- public:
-  OsStackTraceGetterInterface() {}
-  virtual ~OsStackTraceGetterInterface() {}
-
-  // Returns the current OS stack trace as an std::string.  Parameters:
-  //
-  //   max_depth  - the maximum number of stack frames to be included
-  //                in the trace.
-  //   skip_count - the number of top frames to be skipped; doesn't count
-  //                against max_depth.
-  virtual std::string CurrentStackTrace(int max_depth, int skip_count) = 0;
-
-  // UponLeavingGTest() should be called immediately before Google Test calls
-  // user code. It saves some information about the current stack that
-  // CurrentStackTrace() will use to find and hide Google Test stack frames.
-  virtual void UponLeavingGTest() = 0;
-
-  // This string is inserted in place of stack frames that are part of
-  // Google Test's implementation.
-  static const char* const kElidedFramesMarker;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(OsStackTraceGetterInterface);
-};
-
-// A working implementation of the OsStackTraceGetterInterface interface.
-class OsStackTraceGetter : public OsStackTraceGetterInterface {
- public:
-  OsStackTraceGetter() {}
-
-  std::string CurrentStackTrace(int max_depth, int skip_count) override;
-  void UponLeavingGTest() override;
-
- private:
-#if GTEST_HAS_ABSL
-  Mutex mutex_;  // Protects all internal state.
-
-  // We save the stack frame below the frame that calls user code.
-  // We do this because the address of the frame immediately below
-  // the user code changes between the call to UponLeavingGTest()
-  // and any calls to the stack trace code from within the user code.
-  void* caller_frame_ = nullptr;
-#endif  // GTEST_HAS_ABSL
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(OsStackTraceGetter);
-};
-
-// Information about a Google Test trace point.
-struct TraceInfo {
-  const char* file;
-  int line;
-  std::string message;
-};
-
-// This is the default global test part result reporter used in UnitTestImpl.
-// This class should only be used by UnitTestImpl.
-class DefaultGlobalTestPartResultReporter
-  : public TestPartResultReporterInterface {
- public:
-  explicit DefaultGlobalTestPartResultReporter(UnitTestImpl* unit_test);
-  // Implements the TestPartResultReporterInterface. Reports the test part
-  // result in the current test.
-  void ReportTestPartResult(const TestPartResult& result) override;
-
- private:
-  UnitTestImpl* const unit_test_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultGlobalTestPartResultReporter);
-};
-
-// This is the default per thread test part result reporter used in
-// UnitTestImpl. This class should only be used by UnitTestImpl.
-class DefaultPerThreadTestPartResultReporter
-    : public TestPartResultReporterInterface {
- public:
-  explicit DefaultPerThreadTestPartResultReporter(UnitTestImpl* unit_test);
-  // Implements the TestPartResultReporterInterface. The implementation just
-  // delegates to the current global test part result reporter of *unit_test_.
-  void ReportTestPartResult(const TestPartResult& result) override;
-
- private:
-  UnitTestImpl* const unit_test_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultPerThreadTestPartResultReporter);
-};
-
-// The private implementation of the UnitTest class.  We don't protect
-// the methods under a mutex, as this class is not accessible by a
-// user and the UnitTest class that delegates work to this class does
-// proper locking.
-class GTEST_API_ UnitTestImpl {
- public:
-  explicit UnitTestImpl(UnitTest* parent);
-  virtual ~UnitTestImpl();
-
-  // There are two different ways to register your own TestPartResultReporter.
-  // You can register your own repoter to listen either only for test results
-  // from the current thread or for results from all threads.
-  // By default, each per-thread test result repoter just passes a new
-  // TestPartResult to the global test result reporter, which registers the
-  // test part result for the currently running test.
-
-  // Returns the global test part result reporter.
-  TestPartResultReporterInterface* GetGlobalTestPartResultReporter();
-
-  // Sets the global test part result reporter.
-  void SetGlobalTestPartResultReporter(
-      TestPartResultReporterInterface* reporter);
-
-  // Returns the test part result reporter for the current thread.
-  TestPartResultReporterInterface* GetTestPartResultReporterForCurrentThread();
-
-  // Sets the test part result reporter for the current thread.
-  void SetTestPartResultReporterForCurrentThread(
-      TestPartResultReporterInterface* reporter);
-
-  // Gets the number of successful test suites.
-  int successful_test_suite_count() const;
-
-  // Gets the number of failed test suites.
-  int failed_test_suite_count() const;
-
-  // Gets the number of all test suites.
-  int total_test_suite_count() const;
-
-  // Gets the number of all test suites that contain at least one test
-  // that should run.
-  int test_suite_to_run_count() const;
-
-  // Gets the number of successful tests.
-  int successful_test_count() const;
-
-  // Gets the number of skipped tests.
-  int skipped_test_count() const;
-
-  // Gets the number of failed tests.
-  int failed_test_count() const;
-
-  // Gets the number of disabled tests that will be reported in the XML report.
-  int reportable_disabled_test_count() const;
-
-  // Gets the number of disabled tests.
-  int disabled_test_count() const;
-
-  // Gets the number of tests to be printed in the XML report.
-  int reportable_test_count() const;
-
-  // Gets the number of all tests.
-  int total_test_count() const;
-
-  // Gets the number of tests that should run.
-  int test_to_run_count() const;
-
-  // Gets the time of the test program start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const { return start_timestamp_; }
-
-  // Gets the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const { return elapsed_time_; }
-
-  // Returns true if and only if the unit test passed (i.e. all test suites
-  // passed).
-  bool Passed() const { return !Failed(); }
-
-  // Returns true if and only if the unit test failed (i.e. some test suite
-  // failed or something outside of all tests failed).
-  bool Failed() const {
-    return failed_test_suite_count() > 0 || ad_hoc_test_result()->Failed();
-  }
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  const TestSuite* GetTestSuite(int i) const {
-    const int index = GetElementOr(test_suite_indices_, i, -1);
-    return index < 0 ? nullptr : test_suites_[static_cast<size_t>(i)];
-  }
-
-  //  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const TestCase* GetTestCase(int i) const { return GetTestSuite(i); }
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  TestSuite* GetMutableSuiteCase(int i) {
-    const int index = GetElementOr(test_suite_indices_, i, -1);
-    return index < 0 ? nullptr : test_suites_[static_cast<size_t>(index)];
-  }
-
-  // Provides access to the event listener list.
-  TestEventListeners* listeners() { return &listeners_; }
-
-  // Returns the TestResult for the test that's currently running, or
-  // the TestResult for the ad hoc test if no test is running.
-  TestResult* current_test_result();
-
-  // Returns the TestResult for the ad hoc test.
-  const TestResult* ad_hoc_test_result() const { return &ad_hoc_test_result_; }
-
-  // Sets the OS stack trace getter.
-  //
-  // Does nothing if the input and the current OS stack trace getter
-  // are the same; otherwise, deletes the old getter and makes the
-  // input the current getter.
-  void set_os_stack_trace_getter(OsStackTraceGetterInterface* getter);
-
-  // Returns the current OS stack trace getter if it is not NULL;
-  // otherwise, creates an OsStackTraceGetter, makes it the current
-  // getter, and returns it.
-  OsStackTraceGetterInterface* os_stack_trace_getter();
-
-  // Returns the current OS stack trace as an std::string.
-  //
-  // The maximum number of stack frames to be included is specified by
-  // the gtest_stack_trace_depth flag.  The skip_count parameter
-  // specifies the number of top frames to be skipped, which doesn't
-  // count against the number of frames to be included.
-  //
-  // For example, if Foo() calls Bar(), which in turn calls
-  // CurrentOsStackTraceExceptTop(1), Foo() will be included in the
-  // trace but Bar() and CurrentOsStackTraceExceptTop() won't.
-  std::string CurrentOsStackTraceExceptTop(int skip_count) GTEST_NO_INLINE_;
-
-  // Finds and returns a TestSuite with the given name.  If one doesn't
-  // exist, creates one and returns it.
-  //
-  // Arguments:
-  //
-  //   test_suite_name: name of the test suite
-  //   type_param:      the name of the test's type parameter, or NULL if
-  //                    this is not a typed or a type-parameterized test.
-  //   set_up_tc:       pointer to the function that sets up the test suite
-  //   tear_down_tc:    pointer to the function that tears down the test suite
-  TestSuite* GetTestSuite(const char* test_suite_name, const char* type_param,
-                          internal::SetUpTestSuiteFunc set_up_tc,
-                          internal::TearDownTestSuiteFunc tear_down_tc);
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  TestCase* GetTestCase(const char* test_case_name, const char* type_param,
-                        internal::SetUpTestSuiteFunc set_up_tc,
-                        internal::TearDownTestSuiteFunc tear_down_tc) {
-    return GetTestSuite(test_case_name, type_param, set_up_tc, tear_down_tc);
-  }
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Adds a TestInfo to the unit test.
-  //
-  // Arguments:
-  //
-  //   set_up_tc:    pointer to the function that sets up the test suite
-  //   tear_down_tc: pointer to the function that tears down the test suite
-  //   test_info:    the TestInfo object
-  void AddTestInfo(internal::SetUpTestSuiteFunc set_up_tc,
-                   internal::TearDownTestSuiteFunc tear_down_tc,
-                   TestInfo* test_info) {
-#if GTEST_HAS_DEATH_TEST
-    // In order to support thread-safe death tests, we need to
-    // remember the original working directory when the test program
-    // was first invoked.  We cannot do this in RUN_ALL_TESTS(), as
-    // the user may have changed the current directory before calling
-    // RUN_ALL_TESTS().  Therefore we capture the current directory in
-    // AddTestInfo(), which is called to register a TEST or TEST_F
-    // before main() is reached.
-    if (original_working_dir_.IsEmpty()) {
-      original_working_dir_.Set(FilePath::GetCurrentDir());
-      GTEST_CHECK_(!original_working_dir_.IsEmpty())
-          << "Failed to get the current working directory.";
-    }
-#endif  // GTEST_HAS_DEATH_TEST
-
-    GetTestSuite(test_info->test_suite_name(), test_info->type_param(),
-                 set_up_tc, tear_down_tc)
-        ->AddTestInfo(test_info);
-  }
-
-  // Returns ParameterizedTestSuiteRegistry object used to keep track of
-  // value-parameterized tests and instantiate and register them.
-  internal::ParameterizedTestSuiteRegistry& parameterized_test_registry() {
-    return parameterized_test_registry_;
-  }
-
-  std::set<std::string>* ignored_parameterized_test_suites() {
-    return &ignored_parameterized_test_suites_;
-  }
-
-  // Returns TypeParameterizedTestSuiteRegistry object used to keep track of
-  // type-parameterized tests and instantiations of them.
-  internal::TypeParameterizedTestSuiteRegistry&
-  type_parameterized_test_registry() {
-    return type_parameterized_test_registry_;
-  }
-
-  // Sets the TestSuite object for the test that's currently running.
-  void set_current_test_suite(TestSuite* a_current_test_suite) {
-    current_test_suite_ = a_current_test_suite;
-  }
-
-  // Sets the TestInfo object for the test that's currently running.  If
-  // current_test_info is NULL, the assertion results will be stored in
-  // ad_hoc_test_result_.
-  void set_current_test_info(TestInfo* a_current_test_info) {
-    current_test_info_ = a_current_test_info;
-  }
-
-  // Registers all parameterized tests defined using TEST_P and
-  // INSTANTIATE_TEST_SUITE_P, creating regular tests for each test/parameter
-  // combination. This method can be called more then once; it has guards
-  // protecting from registering the tests more then once.  If
-  // value-parameterized tests are disabled, RegisterParameterizedTests is
-  // present but does nothing.
-  void RegisterParameterizedTests();
-
-  // Runs all tests in this UnitTest object, prints the result, and
-  // returns true if all tests are successful.  If any exception is
-  // thrown during a test, this test is considered to be failed, but
-  // the rest of the tests will still be run.
-  bool RunAllTests();
-
-  // Clears the results of all tests, except the ad hoc tests.
-  void ClearNonAdHocTestResult() {
-    ForEach(test_suites_, TestSuite::ClearTestSuiteResult);
-  }
-
-  // Clears the results of ad-hoc test assertions.
-  void ClearAdHocTestResult() {
-    ad_hoc_test_result_.Clear();
-  }
-
-  // Adds a TestProperty to the current TestResult object when invoked in a
-  // context of a test or a test suite, or to the global property set. If the
-  // result already contains a property with the same key, the value will be
-  // updated.
-  void RecordProperty(const TestProperty& test_property);
-
-  enum ReactionToSharding {
-    HONOR_SHARDING_PROTOCOL,
-    IGNORE_SHARDING_PROTOCOL
-  };
-
-  // Matches the full name of each test against the user-specified
-  // filter to decide whether the test should run, then records the
-  // result in each TestSuite and TestInfo object.
-  // If shard_tests == HONOR_SHARDING_PROTOCOL, further filters tests
-  // based on sharding variables in the environment.
-  // Returns the number of tests that should run.
-  int FilterTests(ReactionToSharding shard_tests);
-
-  // Prints the names of the tests matching the user-specified filter flag.
-  void ListTestsMatchingFilter();
-
-  const TestSuite* current_test_suite() const { return current_test_suite_; }
-  TestInfo* current_test_info() { return current_test_info_; }
-  const TestInfo* current_test_info() const { return current_test_info_; }
-
-  // Returns the vector of environments that need to be set-up/torn-down
-  // before/after the tests are run.
-  std::vector<Environment*>& environments() { return environments_; }
-
-  // Getters for the per-thread Google Test trace stack.
-  std::vector<TraceInfo>& gtest_trace_stack() {
-    return *(gtest_trace_stack_.pointer());
-  }
-  const std::vector<TraceInfo>& gtest_trace_stack() const {
-    return gtest_trace_stack_.get();
-  }
-
-#if GTEST_HAS_DEATH_TEST
-  void InitDeathTestSubprocessControlInfo() {
-    internal_run_death_test_flag_.reset(ParseInternalRunDeathTestFlag());
-  }
-  // Returns a pointer to the parsed --gtest_internal_run_death_test
-  // flag, or NULL if that flag was not specified.
-  // This information is useful only in a death test child process.
-  // Must not be called before a call to InitGoogleTest.
-  const InternalRunDeathTestFlag* internal_run_death_test_flag() const {
-    return internal_run_death_test_flag_.get();
-  }
-
-  // Returns a pointer to the current death test factory.
-  internal::DeathTestFactory* death_test_factory() {
-    return death_test_factory_.get();
-  }
-
-  void SuppressTestEventsIfInSubprocess();
-
-  friend class ReplaceDeathTestFactory;
-#endif  // GTEST_HAS_DEATH_TEST
-
-  // Initializes the event listener performing XML output as specified by
-  // UnitTestOptions. Must not be called before InitGoogleTest.
-  void ConfigureXmlOutput();
-
-#if GTEST_CAN_STREAM_RESULTS_
-  // Initializes the event listener for streaming test results to a socket.
-  // Must not be called before InitGoogleTest.
-  void ConfigureStreamingOutput();
-#endif
-
-  // Performs initialization dependent upon flag values obtained in
-  // ParseGoogleTestFlagsOnly.  Is called from InitGoogleTest after the call to
-  // ParseGoogleTestFlagsOnly.  In case a user neglects to call InitGoogleTest
-  // this function is also called from RunAllTests.  Since this function can be
-  // called more than once, it has to be idempotent.
-  void PostFlagParsingInit();
-
-  // Gets the random seed used at the start of the current test iteration.
-  int random_seed() const { return random_seed_; }
-
-  // Gets the random number generator.
-  internal::Random* random() { return &random_; }
-
-  // Shuffles all test suites, and the tests within each test suite,
-  // making sure that death tests are still run first.
-  void ShuffleTests();
-
-  // Restores the test suites and tests to their order before the first shuffle.
-  void UnshuffleTests();
-
-  // Returns the value of GTEST_FLAG(catch_exceptions) at the moment
-  // UnitTest::Run() starts.
-  bool catch_exceptions() const { return catch_exceptions_; }
-
- private:
-  friend class ::testing::UnitTest;
-
-  // Used by UnitTest::Run() to capture the state of
-  // GTEST_FLAG(catch_exceptions) at the moment it starts.
-  void set_catch_exceptions(bool value) { catch_exceptions_ = value; }
-
-  // The UnitTest object that owns this implementation object.
-  UnitTest* const parent_;
-
-  // The working directory when the first TEST() or TEST_F() was
-  // executed.
-  internal::FilePath original_working_dir_;
-
-  // The default test part result reporters.
-  DefaultGlobalTestPartResultReporter default_global_test_part_result_reporter_;
-  DefaultPerThreadTestPartResultReporter
-      default_per_thread_test_part_result_reporter_;
-
-  // Points to (but doesn't own) the global test part result reporter.
-  TestPartResultReporterInterface* global_test_part_result_repoter_;
-
-  // Protects read and write access to global_test_part_result_reporter_.
-  internal::Mutex global_test_part_result_reporter_mutex_;
-
-  // Points to (but doesn't own) the per-thread test part result reporter.
-  internal::ThreadLocal<TestPartResultReporterInterface*>
-      per_thread_test_part_result_reporter_;
-
-  // The vector of environments that need to be set-up/torn-down
-  // before/after the tests are run.
-  std::vector<Environment*> environments_;
-
-  // The vector of TestSuites in their original order.  It owns the
-  // elements in the vector.
-  std::vector<TestSuite*> test_suites_;
-
-  // Provides a level of indirection for the test suite list to allow
-  // easy shuffling and restoring the test suite order.  The i-th
-  // element of this vector is the index of the i-th test suite in the
-  // shuffled order.
-  std::vector<int> test_suite_indices_;
-
-  // ParameterizedTestRegistry object used to register value-parameterized
-  // tests.
-  internal::ParameterizedTestSuiteRegistry parameterized_test_registry_;
-  internal::TypeParameterizedTestSuiteRegistry
-      type_parameterized_test_registry_;
-
-  // The set holding the name of parameterized
-  // test suites that may go uninstantiated.
-  std::set<std::string> ignored_parameterized_test_suites_;
-
-  // Indicates whether RegisterParameterizedTests() has been called already.
-  bool parameterized_tests_registered_;
-
-  // Index of the last death test suite registered.  Initially -1.
-  int last_death_test_suite_;
-
-  // This points to the TestSuite for the currently running test.  It
-  // changes as Google Test goes through one test suite after another.
-  // When no test is running, this is set to NULL and Google Test
-  // stores assertion results in ad_hoc_test_result_.  Initially NULL.
-  TestSuite* current_test_suite_;
-
-  // This points to the TestInfo for the currently running test.  It
-  // changes as Google Test goes through one test after another.  When
-  // no test is running, this is set to NULL and Google Test stores
-  // assertion results in ad_hoc_test_result_.  Initially NULL.
-  TestInfo* current_test_info_;
-
-  // Normally, a user only writes assertions inside a TEST or TEST_F,
-  // or inside a function called by a TEST or TEST_F.  Since Google
-  // Test keeps track of which test is current running, it can
-  // associate such an assertion with the test it belongs to.
-  //
-  // If an assertion is encountered when no TEST or TEST_F is running,
-  // Google Test attributes the assertion result to an imaginary "ad hoc"
-  // test, and records the result in ad_hoc_test_result_.
-  TestResult ad_hoc_test_result_;
-
-  // The list of event listeners that can be used to track events inside
-  // Google Test.
-  TestEventListeners listeners_;
-
-  // The OS stack trace getter.  Will be deleted when the UnitTest
-  // object is destructed.  By default, an OsStackTraceGetter is used,
-  // but the user can set this field to use a custom getter if that is
-  // desired.
-  OsStackTraceGetterInterface* os_stack_trace_getter_;
-
-  // True if and only if PostFlagParsingInit() has been called.
-  bool post_flag_parse_init_performed_;
-
-  // The random number seed used at the beginning of the test run.
-  int random_seed_;
-
-  // Our random number generator.
-  internal::Random random_;
-
-  // The time of the test program start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp_;
-
-  // How long the test took to run, in milliseconds.
-  TimeInMillis elapsed_time_;
-
-#if GTEST_HAS_DEATH_TEST
-  // The decomposed components of the gtest_internal_run_death_test flag,
-  // parsed when RUN_ALL_TESTS is called.
-  std::unique_ptr<InternalRunDeathTestFlag> internal_run_death_test_flag_;
-  std::unique_ptr<internal::DeathTestFactory> death_test_factory_;
-#endif  // GTEST_HAS_DEATH_TEST
-
-  // A per-thread stack of traces created by the SCOPED_TRACE() macro.
-  internal::ThreadLocal<std::vector<TraceInfo> > gtest_trace_stack_;
-
-  // The value of GTEST_FLAG(catch_exceptions) at the moment RunAllTests()
-  // starts.
-  bool catch_exceptions_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(UnitTestImpl);
-};  // class UnitTestImpl
-
-// Convenience function for accessing the global UnitTest
-// implementation object.
-inline UnitTestImpl* GetUnitTestImpl() {
-  return UnitTest::GetInstance()->impl();
-}
-
-#if GTEST_USES_SIMPLE_RE
-
-// Internal helper functions for implementing the simple regular
-// expression matcher.
-GTEST_API_ bool IsInSet(char ch, const char* str);
-GTEST_API_ bool IsAsciiDigit(char ch);
-GTEST_API_ bool IsAsciiPunct(char ch);
-GTEST_API_ bool IsRepeat(char ch);
-GTEST_API_ bool IsAsciiWhiteSpace(char ch);
-GTEST_API_ bool IsAsciiWordChar(char ch);
-GTEST_API_ bool IsValidEscape(char ch);
-GTEST_API_ bool AtomMatchesChar(bool escaped, char pattern, char ch);
-GTEST_API_ bool ValidateRegex(const char* regex);
-GTEST_API_ bool MatchRegexAtHead(const char* regex, const char* str);
-GTEST_API_ bool MatchRepetitionAndRegexAtHead(
-    bool escaped, char ch, char repeat, const char* regex, const char* str);
-GTEST_API_ bool MatchRegexAnywhere(const char* regex, const char* str);
-
-#endif  // GTEST_USES_SIMPLE_RE
-
-// Parses the command line for Google Test flags, without initializing
-// other parts of Google Test.
-GTEST_API_ void ParseGoogleTestFlagsOnly(int* argc, char** argv);
-GTEST_API_ void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv);
-
-#if GTEST_HAS_DEATH_TEST
-
-// Returns the message describing the last system error, regardless of the
-// platform.
-GTEST_API_ std::string GetLastErrnoDescription();
-
-// Attempts to parse a string into a positive integer pointed to by the
-// number parameter.  Returns true if that is possible.
-// GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we can use
-// it here.
-template <typename Integer>
-bool ParseNaturalNumber(const ::std::string& str, Integer* number) {
-  // Fail fast if the given string does not begin with a digit;
-  // this bypasses strtoXXX's "optional leading whitespace and plus
-  // or minus sign" semantics, which are undesirable here.
-  if (str.empty() || !IsDigit(str[0])) {
-    return false;
-  }
-  errno = 0;
-
-  char* end;
-  // BiggestConvertible is the largest integer type that system-provided
-  // string-to-number conversion routines can return.
-  using BiggestConvertible = unsigned long long;  // NOLINT
-
-  const BiggestConvertible parsed = strtoull(str.c_str(), &end, 10);  // NOLINT
-  const bool parse_success = *end == '\0' && errno == 0;
-
-  GTEST_CHECK_(sizeof(Integer) <= sizeof(parsed));
-
-  const Integer result = static_cast<Integer>(parsed);
-  if (parse_success && static_cast<BiggestConvertible>(result) == parsed) {
-    *number = result;
-    return true;
-  }
-  return false;
-}
-#endif  // GTEST_HAS_DEATH_TEST
-
-// TestResult contains some private methods that should be hidden from
-// Google Test user but are required for testing. This class allow our tests
-// to access them.
-//
-// This class is supplied only for the purpose of testing Google Test's own
-// constructs. Do not use it in user tests, either directly or indirectly.
-class TestResultAccessor {
- public:
-  static void RecordProperty(TestResult* test_result,
-                             const std::string& xml_element,
-                             const TestProperty& property) {
-    test_result->RecordProperty(xml_element, property);
-  }
-
-  static void ClearTestPartResults(TestResult* test_result) {
-    test_result->ClearTestPartResults();
-  }
-
-  static const std::vector<testing::TestPartResult>& test_part_results(
-      const TestResult& test_result) {
-    return test_result.test_part_results();
-  }
-};
-
-#if GTEST_CAN_STREAM_RESULTS_
-
-// Streams test results to the given port on the given host machine.
-class StreamingListener : public EmptyTestEventListener {
- public:
-  // Abstract base class for writing strings to a socket.
-  class AbstractSocketWriter {
-   public:
-    virtual ~AbstractSocketWriter() {}
-
-    // Sends a string to the socket.
-    virtual void Send(const std::string& message) = 0;
-
-    // Closes the socket.
-    virtual void CloseConnection() {}
-
-    // Sends a string and a newline to the socket.
-    void SendLn(const std::string& message) { Send(message + "\n"); }
-  };
-
-  // Concrete class for actually writing strings to a socket.
-  class SocketWriter : public AbstractSocketWriter {
-   public:
-    SocketWriter(const std::string& host, const std::string& port)
-        : sockfd_(-1), host_name_(host), port_num_(port) {
-      MakeConnection();
-    }
-
-    ~SocketWriter() override {
-      if (sockfd_ != -1)
-        CloseConnection();
-    }
-
-    // Sends a string to the socket.
-    void Send(const std::string& message) override {
-      GTEST_CHECK_(sockfd_ != -1)
-          << "Send() can be called only when there is a connection.";
-
-      const auto len = static_cast<size_t>(message.length());
-      if (write(sockfd_, message.c_str(), len) != static_cast<ssize_t>(len)) {
-        GTEST_LOG_(WARNING)
-            << "stream_result_to: failed to stream to "
-            << host_name_ << ":" << port_num_;
-      }
-    }
-
-   private:
-    // Creates a client socket and connects to the server.
-    void MakeConnection();
-
-    // Closes the socket.
-    void CloseConnection() override {
-      GTEST_CHECK_(sockfd_ != -1)
-          << "CloseConnection() can be called only when there is a connection.";
-
-      close(sockfd_);
-      sockfd_ = -1;
-    }
-
-    int sockfd_;  // socket file descriptor
-    const std::string host_name_;
-    const std::string port_num_;
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(SocketWriter);
-  };  // class SocketWriter
-
-  // Escapes '=', '&', '%', and '\n' characters in str as "%xx".
-  static std::string UrlEncode(const char* str);
-
-  StreamingListener(const std::string& host, const std::string& port)
-      : socket_writer_(new SocketWriter(host, port)) {
-    Start();
-  }
-
-  explicit StreamingListener(AbstractSocketWriter* socket_writer)
-      : socket_writer_(socket_writer) { Start(); }
-
-  void OnTestProgramStart(const UnitTest& /* unit_test */) override {
-    SendLn("event=TestProgramStart");
-  }
-
-  void OnTestProgramEnd(const UnitTest& unit_test) override {
-    // Note that Google Test current only report elapsed time for each
-    // test iteration, not for the entire test program.
-    SendLn("event=TestProgramEnd&passed=" + FormatBool(unit_test.Passed()));
-
-    // Notify the streaming server to stop.
-    socket_writer_->CloseConnection();
-  }
-
-  void OnTestIterationStart(const UnitTest& /* unit_test */,
-                            int iteration) override {
-    SendLn("event=TestIterationStart&iteration=" +
-           StreamableToString(iteration));
-  }
-
-  void OnTestIterationEnd(const UnitTest& unit_test,
-                          int /* iteration */) override {
-    SendLn("event=TestIterationEnd&passed=" +
-           FormatBool(unit_test.Passed()) + "&elapsed_time=" +
-           StreamableToString(unit_test.elapsed_time()) + "ms");
-  }
-
-  // Note that "event=TestCaseStart" is a wire format and has to remain
-  // "case" for compatibility
-  void OnTestCaseStart(const TestCase& test_case) override {
-    SendLn(std::string("event=TestCaseStart&name=") + test_case.name());
-  }
-
-  // Note that "event=TestCaseEnd" is a wire format and has to remain
-  // "case" for compatibility
-  void OnTestCaseEnd(const TestCase& test_case) override {
-    SendLn("event=TestCaseEnd&passed=" + FormatBool(test_case.Passed()) +
-           "&elapsed_time=" + StreamableToString(test_case.elapsed_time()) +
-           "ms");
-  }
-
-  void OnTestStart(const TestInfo& test_info) override {
-    SendLn(std::string("event=TestStart&name=") + test_info.name());
-  }
-
-  void OnTestEnd(const TestInfo& test_info) override {
-    SendLn("event=TestEnd&passed=" +
-           FormatBool((test_info.result())->Passed()) +
-           "&elapsed_time=" +
-           StreamableToString((test_info.result())->elapsed_time()) + "ms");
-  }
-
-  void OnTestPartResult(const TestPartResult& test_part_result) override {
-    const char* file_name = test_part_result.file_name();
-    if (file_name == nullptr) file_name = "";
-    SendLn("event=TestPartResult&file=" + UrlEncode(file_name) +
-           "&line=" + StreamableToString(test_part_result.line_number()) +
-           "&message=" + UrlEncode(test_part_result.message()));
-  }
-
- private:
-  // Sends the given message and a newline to the socket.
-  void SendLn(const std::string& message) { socket_writer_->SendLn(message); }
-
-  // Called at the start of streaming to notify the receiver what
-  // protocol we are using.
-  void Start() { SendLn("gtest_streaming_protocol_version=1.0"); }
-
-  std::string FormatBool(bool value) { return value ? "1" : "0"; }
-
-  const std::unique_ptr<AbstractSocketWriter> socket_writer_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(StreamingListener);
-};  // class StreamingListener
-
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-}  // namespace internal
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GOOGLETEST_SRC_GTEST_INTERNAL_INL_H_
-
-#if GTEST_OS_WINDOWS
-# define vsnprintf _vsnprintf
-#endif  // GTEST_OS_WINDOWS
-
-#if GTEST_OS_MAC
-#ifndef GTEST_OS_IOS
-#include <crt_externs.h>
-#endif
-#endif
-
-#if GTEST_HAS_ABSL
-#include "absl/debugging/failure_signal_handler.h"
-#include "absl/debugging/stacktrace.h"
-#include "absl/debugging/symbolize.h"
-#include "absl/strings/str_cat.h"
-#endif  // GTEST_HAS_ABSL
-
-namespace testing {
-
-using internal::CountIf;
-using internal::ForEach;
-using internal::GetElementOr;
-using internal::Shuffle;
-
-// Constants.
-
-// A test whose test suite name or test name matches this filter is
-// disabled and not run.
-static const char kDisableTestFilter[] = "DISABLED_*:*/DISABLED_*";
-
-// A test suite whose name matches this filter is considered a death
-// test suite and will be run before test suites whose name doesn't
-// match this filter.
-static const char kDeathTestSuiteFilter[] = "*DeathTest:*DeathTest/*";
-
-// A test filter that matches everything.
-static const char kUniversalFilter[] = "*";
-
-// The default output format.
-static const char kDefaultOutputFormat[] = "xml";
-// The default output file.
-static const char kDefaultOutputFile[] = "test_detail";
-
-// The environment variable name for the test shard index.
-static const char kTestShardIndex[] = "GTEST_SHARD_INDEX";
-// The environment variable name for the total number of test shards.
-static const char kTestTotalShards[] = "GTEST_TOTAL_SHARDS";
-// The environment variable name for the test shard status file.
-static const char kTestShardStatusFile[] = "GTEST_SHARD_STATUS_FILE";
-
-namespace internal {
-
-// The text used in failure messages to indicate the start of the
-// stack trace.
-const char kStackTraceMarker[] = "\nStack trace:\n";
-
-// g_help_flag is true if and only if the --help flag or an equivalent form
-// is specified on the command line.
-bool g_help_flag = false;
-
-// Utilty function to Open File for Writing
-static FILE* OpenFileForWriting(const std::string& output_file) {
-  FILE* fileout = nullptr;
-  FilePath output_file_path(output_file);
-  FilePath output_dir(output_file_path.RemoveFileName());
-
-  if (output_dir.CreateDirectoriesRecursively()) {
-    fileout = posix::FOpen(output_file.c_str(), "w");
-  }
-  if (fileout == nullptr) {
-    GTEST_LOG_(FATAL) << "Unable to open file \"" << output_file << "\"";
-  }
-  return fileout;
-}
-
-}  // namespace internal
-
-// Bazel passes in the argument to '--test_filter' via the TESTBRIDGE_TEST_ONLY
-// environment variable.
-static const char* GetDefaultFilter() {
-  const char* const testbridge_test_only =
-      internal::posix::GetEnv("TESTBRIDGE_TEST_ONLY");
-  if (testbridge_test_only != nullptr) {
-    return testbridge_test_only;
-  }
-  return kUniversalFilter;
-}
-
-// Bazel passes in the argument to '--test_runner_fail_fast' via the
-// TESTBRIDGE_TEST_RUNNER_FAIL_FAST environment variable.
-static bool GetDefaultFailFast() {
-  const char* const testbridge_test_runner_fail_fast =
-      internal::posix::GetEnv("TESTBRIDGE_TEST_RUNNER_FAIL_FAST");
-  if (testbridge_test_runner_fail_fast != nullptr) {
-    return strcmp(testbridge_test_runner_fail_fast, "1") == 0;
-  }
-  return false;
-}
-
-GTEST_DEFINE_bool_(
-    fail_fast, internal::BoolFromGTestEnv("fail_fast", GetDefaultFailFast()),
-    "True if and only if a test failure should stop further test execution.");
-
-GTEST_DEFINE_bool_(
-    also_run_disabled_tests,
-    internal::BoolFromGTestEnv("also_run_disabled_tests", false),
-    "Run disabled tests too, in addition to the tests normally being run.");
-
-GTEST_DEFINE_bool_(
-    break_on_failure, internal::BoolFromGTestEnv("break_on_failure", false),
-    "True if and only if a failed assertion should be a debugger "
-    "break-point.");
-
-GTEST_DEFINE_bool_(catch_exceptions,
-                   internal::BoolFromGTestEnv("catch_exceptions", true),
-                   "True if and only if " GTEST_NAME_
-                   " should catch exceptions and treat them as test failures.");
-
-GTEST_DEFINE_string_(
-    color,
-    internal::StringFromGTestEnv("color", "auto"),
-    "Whether to use colors in the output.  Valid values: yes, no, "
-    "and auto.  'auto' means to use colors if the output is "
-    "being sent to a terminal and the TERM environment variable "
-    "is set to a terminal type that supports colors.");
-
-GTEST_DEFINE_string_(
-    filter,
-    internal::StringFromGTestEnv("filter", GetDefaultFilter()),
-    "A colon-separated list of glob (not regex) patterns "
-    "for filtering the tests to run, optionally followed by a "
-    "'-' and a : separated list of negative patterns (tests to "
-    "exclude).  A test is run if it matches one of the positive "
-    "patterns and does not match any of the negative patterns.");
-
-GTEST_DEFINE_bool_(
-    install_failure_signal_handler,
-    internal::BoolFromGTestEnv("install_failure_signal_handler", false),
-    "If true and supported on the current platform, " GTEST_NAME_ " should "
-    "install a signal handler that dumps debugging information when fatal "
-    "signals are raised.");
-
-GTEST_DEFINE_bool_(list_tests, false,
-                   "List all tests without running them.");
-
-// The net priority order after flag processing is thus:
-//   --gtest_output command line flag
-//   GTEST_OUTPUT environment variable
-//   XML_OUTPUT_FILE environment variable
-//   ''
-GTEST_DEFINE_string_(
-    output,
-    internal::StringFromGTestEnv("output",
-      internal::OutputFlagAlsoCheckEnvVar().c_str()),
-    "A format (defaults to \"xml\" but can be specified to be \"json\"), "
-    "optionally followed by a colon and an output file name or directory. "
-    "A directory is indicated by a trailing pathname separator. "
-    "Examples: \"xml:filename.xml\", \"xml::directoryname/\". "
-    "If a directory is specified, output files will be created "
-    "within that directory, with file-names based on the test "
-    "executable's name and, if necessary, made unique by adding "
-    "digits.");
-
-GTEST_DEFINE_bool_(
-    brief, internal::BoolFromGTestEnv("brief", false),
-    "True if only test failures should be displayed in text output.");
-
-GTEST_DEFINE_bool_(print_time, internal::BoolFromGTestEnv("print_time", true),
-                   "True if and only if " GTEST_NAME_
-                   " should display elapsed time in text output.");
-
-GTEST_DEFINE_bool_(print_utf8, internal::BoolFromGTestEnv("print_utf8", true),
-                   "True if and only if " GTEST_NAME_
-                   " prints UTF8 characters as text.");
-
-GTEST_DEFINE_int32_(
-    random_seed,
-    internal::Int32FromGTestEnv("random_seed", 0),
-    "Random number seed to use when shuffling test orders.  Must be in range "
-    "[1, 99999], or 0 to use a seed based on the current time.");
-
-GTEST_DEFINE_int32_(
-    repeat,
-    internal::Int32FromGTestEnv("repeat", 1),
-    "How many times to repeat each test.  Specify a negative number "
-    "for repeating forever.  Useful for shaking out flaky tests.");
-
-GTEST_DEFINE_bool_(show_internal_stack_frames, false,
-                   "True if and only if " GTEST_NAME_
-                   " should include internal stack frames when "
-                   "printing test failure stack traces.");
-
-GTEST_DEFINE_bool_(shuffle, internal::BoolFromGTestEnv("shuffle", false),
-                   "True if and only if " GTEST_NAME_
-                   " should randomize tests' order on every run.");
-
-GTEST_DEFINE_int32_(
-    stack_trace_depth,
-    internal::Int32FromGTestEnv("stack_trace_depth", kMaxStackTraceDepth),
-    "The maximum number of stack frames to print when an "
-    "assertion fails.  The valid range is 0 through 100, inclusive.");
-
-GTEST_DEFINE_string_(
-    stream_result_to,
-    internal::StringFromGTestEnv("stream_result_to", ""),
-    "This flag specifies the host name and the port number on which to stream "
-    "test results. Example: \"localhost:555\". The flag is effective only on "
-    "Linux.");
-
-GTEST_DEFINE_bool_(
-    throw_on_failure,
-    internal::BoolFromGTestEnv("throw_on_failure", false),
-    "When this flag is specified, a failed assertion will throw an exception "
-    "if exceptions are enabled or exit the program with a non-zero code "
-    "otherwise. For use with an external test framework.");
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-GTEST_DEFINE_string_(
-    flagfile,
-    internal::StringFromGTestEnv("flagfile", ""),
-    "This flag specifies the flagfile to read command-line flags from.");
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-namespace internal {
-
-// Generates a random number from [0, range), using a Linear
-// Congruential Generator (LCG).  Crashes if 'range' is 0 or greater
-// than kMaxRange.
-uint32_t Random::Generate(uint32_t range) {
-  // These constants are the same as are used in glibc's rand(3).
-  // Use wider types than necessary to prevent unsigned overflow diagnostics.
-  state_ = static_cast<uint32_t>(1103515245ULL*state_ + 12345U) % kMaxRange;
-
-  GTEST_CHECK_(range > 0)
-      << "Cannot generate a number in the range [0, 0).";
-  GTEST_CHECK_(range <= kMaxRange)
-      << "Generation of a number in [0, " << range << ") was requested, "
-      << "but this can only generate numbers in [0, " << kMaxRange << ").";
-
-  // Converting via modulus introduces a bit of downward bias, but
-  // it's simple, and a linear congruential generator isn't too good
-  // to begin with.
-  return state_ % range;
-}
-
-// GTestIsInitialized() returns true if and only if the user has initialized
-// Google Test.  Useful for catching the user mistake of not initializing
-// Google Test before calling RUN_ALL_TESTS().
-static bool GTestIsInitialized() { return GetArgvs().size() > 0; }
-
-// Iterates over a vector of TestSuites, keeping a running sum of the
-// results of calling a given int-returning method on each.
-// Returns the sum.
-static int SumOverTestSuiteList(const std::vector<TestSuite*>& case_list,
-                                int (TestSuite::*method)() const) {
-  int sum = 0;
-  for (size_t i = 0; i < case_list.size(); i++) {
-    sum += (case_list[i]->*method)();
-  }
-  return sum;
-}
-
-// Returns true if and only if the test suite passed.
-static bool TestSuitePassed(const TestSuite* test_suite) {
-  return test_suite->should_run() && test_suite->Passed();
-}
-
-// Returns true if and only if the test suite failed.
-static bool TestSuiteFailed(const TestSuite* test_suite) {
-  return test_suite->should_run() && test_suite->Failed();
-}
-
-// Returns true if and only if test_suite contains at least one test that
-// should run.
-static bool ShouldRunTestSuite(const TestSuite* test_suite) {
-  return test_suite->should_run();
-}
-
-// AssertHelper constructor.
-AssertHelper::AssertHelper(TestPartResult::Type type,
-                           const char* file,
-                           int line,
-                           const char* message)
-    : data_(new AssertHelperData(type, file, line, message)) {
-}
-
-AssertHelper::~AssertHelper() {
-  delete data_;
-}
-
-// Message assignment, for assertion streaming support.
-void AssertHelper::operator=(const Message& message) const {
-  UnitTest::GetInstance()->
-    AddTestPartResult(data_->type, data_->file, data_->line,
-                      AppendUserMessage(data_->message, message),
-                      UnitTest::GetInstance()->impl()
-                      ->CurrentOsStackTraceExceptTop(1)
-                      // Skips the stack frame for this function itself.
-                      );  // NOLINT
-}
-
-namespace {
-
-// When TEST_P is found without a matching INSTANTIATE_TEST_SUITE_P
-// to creates test cases for it, a syntetic test case is
-// inserted to report ether an error or a log message.
-//
-// This configuration bit will likely be removed at some point.
-constexpr bool kErrorOnUninstantiatedParameterizedTest = true;
-constexpr bool kErrorOnUninstantiatedTypeParameterizedTest = true;
-
-// A test that fails at a given file/line location with a given message.
-class FailureTest : public Test {
- public:
-  explicit FailureTest(const CodeLocation& loc, std::string error_message,
-                       bool as_error)
-      : loc_(loc),
-        error_message_(std::move(error_message)),
-        as_error_(as_error) {}
-
-  void TestBody() override {
-    if (as_error_) {
-      AssertHelper(TestPartResult::kNonFatalFailure, loc_.file.c_str(),
-                   loc_.line, "") = Message() << error_message_;
-    } else {
-      std::cout << error_message_ << std::endl;
-    }
-  }
-
- private:
-  const CodeLocation loc_;
-  const std::string error_message_;
-  const bool as_error_;
-};
-
-
-}  // namespace
-
-std::set<std::string>* GetIgnoredParameterizedTestSuites() {
-  return UnitTest::GetInstance()->impl()->ignored_parameterized_test_suites();
-}
-
-// Add a given test_suit to the list of them allow to go un-instantiated.
-MarkAsIgnored::MarkAsIgnored(const char* test_suite) {
-  GetIgnoredParameterizedTestSuites()->insert(test_suite);
-}
-
-// If this parameterized test suite has no instantiations (and that
-// has not been marked as okay), emit a test case reporting that.
-void InsertSyntheticTestCase(const std::string& name, CodeLocation location,
-                             bool has_test_p) {
-  const auto& ignored = *GetIgnoredParameterizedTestSuites();
-  if (ignored.find(name) != ignored.end()) return;
-
-  const char kMissingInstantiation[] =  //
-      " is defined via TEST_P, but never instantiated. None of the test cases "
-      "will run. Either no INSTANTIATE_TEST_SUITE_P is provided or the only "
-      "ones provided expand to nothing."
-      "\n\n"
-      "Ideally, TEST_P definitions should only ever be included as part of "
-      "binaries that intend to use them. (As opposed to, for example, being "
-      "placed in a library that may be linked in to get other utilities.)";
-
-  const char kMissingTestCase[] =  //
-      " is instantiated via INSTANTIATE_TEST_SUITE_P, but no tests are "
-      "defined via TEST_P . No test cases will run."
-      "\n\n"
-      "Ideally, INSTANTIATE_TEST_SUITE_P should only ever be invoked from "
-      "code that always depend on code that provides TEST_P. Failing to do "
-      "so is often an indication of dead code, e.g. the last TEST_P was "
-      "removed but the rest got left behind.";
-
-  std::string message =
-      "Parameterized test suite " + name +
-      (has_test_p ? kMissingInstantiation : kMissingTestCase) +
-      "\n\n"
-      "To suppress this error for this test suite, insert the following line "
-      "(in a non-header) in the namespace it is defined in:"
-      "\n\n"
-      "GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(" + name + ");";
-
-  std::string full_name = "UninstantiatedParameterizedTestSuite<" + name + ">";
-  RegisterTest(  //
-      "GoogleTestVerification", full_name.c_str(),
-      nullptr,  // No type parameter.
-      nullptr,  // No value parameter.
-      location.file.c_str(), location.line, [message, location] {
-        return new FailureTest(location, message,
-                               kErrorOnUninstantiatedParameterizedTest);
-      });
-}
-
-void RegisterTypeParameterizedTestSuite(const char* test_suite_name,
-                                        CodeLocation code_location) {
-  GetUnitTestImpl()->type_parameterized_test_registry().RegisterTestSuite(
-      test_suite_name, code_location);
-}
-
-void RegisterTypeParameterizedTestSuiteInstantiation(const char* case_name) {
-  GetUnitTestImpl()
-      ->type_parameterized_test_registry()
-      .RegisterInstantiation(case_name);
-}
-
-void TypeParameterizedTestSuiteRegistry::RegisterTestSuite(
-    const char* test_suite_name, CodeLocation code_location) {
-  suites_.emplace(std::string(test_suite_name),
-                 TypeParameterizedTestSuiteInfo(code_location));
-}
-
-void TypeParameterizedTestSuiteRegistry::RegisterInstantiation(
-        const char* test_suite_name) {
-  auto it = suites_.find(std::string(test_suite_name));
-  if (it != suites_.end()) {
-    it->second.instantiated = true;
-  } else {
-    GTEST_LOG_(ERROR) << "Unknown type parameterized test suit '"
-                      << test_suite_name << "'";
-  }
-}
-
-void TypeParameterizedTestSuiteRegistry::CheckForInstantiations() {
-  const auto& ignored = *GetIgnoredParameterizedTestSuites();
-  for (const auto& testcase : suites_) {
-    if (testcase.second.instantiated) continue;
-    if (ignored.find(testcase.first) != ignored.end()) continue;
-
-    std::string message =
-        "Type parameterized test suite " + testcase.first +
-        " is defined via REGISTER_TYPED_TEST_SUITE_P, but never instantiated "
-        "via INSTANTIATE_TYPED_TEST_SUITE_P. None of the test cases will run."
-        "\n\n"
-        "Ideally, TYPED_TEST_P definitions should only ever be included as "
-        "part of binaries that intend to use them. (As opposed to, for "
-        "example, being placed in a library that may be linked in to get other "
-        "utilities.)"
-        "\n\n"
-        "To suppress this error for this test suite, insert the following line "
-        "(in a non-header) in the namespace it is defined in:"
-        "\n\n"
-        "GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(" +
-        testcase.first + ");";
-
-    std::string full_name =
-        "UninstantiatedTypeParameterizedTestSuite<" + testcase.first + ">";
-    RegisterTest(  //
-        "GoogleTestVerification", full_name.c_str(),
-        nullptr,  // No type parameter.
-        nullptr,  // No value parameter.
-        testcase.second.code_location.file.c_str(),
-        testcase.second.code_location.line, [message, testcase] {
-          return new FailureTest(testcase.second.code_location, message,
-                                 kErrorOnUninstantiatedTypeParameterizedTest);
-        });
-  }
-}
-
-// A copy of all command line arguments.  Set by InitGoogleTest().
-static ::std::vector<std::string> g_argvs;
-
-::std::vector<std::string> GetArgvs() {
-#if defined(GTEST_CUSTOM_GET_ARGVS_)
-  // GTEST_CUSTOM_GET_ARGVS_() may return a container of std::string or
-  // ::string. This code converts it to the appropriate type.
-  const auto& custom = GTEST_CUSTOM_GET_ARGVS_();
-  return ::std::vector<std::string>(custom.begin(), custom.end());
-#else   // defined(GTEST_CUSTOM_GET_ARGVS_)
-  return g_argvs;
-#endif  // defined(GTEST_CUSTOM_GET_ARGVS_)
-}
-
-// Returns the current application's name, removing directory path if that
-// is present.
-FilePath GetCurrentExecutableName() {
-  FilePath result;
-
-#if GTEST_OS_WINDOWS || GTEST_OS_OS2
-  result.Set(FilePath(GetArgvs()[0]).RemoveExtension("exe"));
-#else
-  result.Set(FilePath(GetArgvs()[0]));
-#endif  // GTEST_OS_WINDOWS
-
-  return result.RemoveDirectoryName();
-}
-
-// Functions for processing the gtest_output flag.
-
-// Returns the output format, or "" for normal printed output.
-std::string UnitTestOptions::GetOutputFormat() {
-  const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
-  const char* const colon = strchr(gtest_output_flag, ':');
-  return (colon == nullptr)
-             ? std::string(gtest_output_flag)
-             : std::string(gtest_output_flag,
-                           static_cast<size_t>(colon - gtest_output_flag));
-}
-
-// Returns the name of the requested output file, or the default if none
-// was explicitly specified.
-std::string UnitTestOptions::GetAbsolutePathToOutputFile() {
-  const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
-
-  std::string format = GetOutputFormat();
-  if (format.empty())
-    format = std::string(kDefaultOutputFormat);
-
-  const char* const colon = strchr(gtest_output_flag, ':');
-  if (colon == nullptr)
-    return internal::FilePath::MakeFileName(
-        internal::FilePath(
-            UnitTest::GetInstance()->original_working_dir()),
-        internal::FilePath(kDefaultOutputFile), 0,
-        format.c_str()).string();
-
-  internal::FilePath output_name(colon + 1);
-  if (!output_name.IsAbsolutePath())
-    output_name = internal::FilePath::ConcatPaths(
-        internal::FilePath(UnitTest::GetInstance()->original_working_dir()),
-        internal::FilePath(colon + 1));
-
-  if (!output_name.IsDirectory())
-    return output_name.string();
-
-  internal::FilePath result(internal::FilePath::GenerateUniqueFileName(
-      output_name, internal::GetCurrentExecutableName(),
-      GetOutputFormat().c_str()));
-  return result.string();
-}
-
-// Returns true if and only if the wildcard pattern matches the string. Each
-// pattern consists of regular characters, single-character wildcards (?), and
-// multi-character wildcards (*).
-//
-// This function implements a linear-time string globbing algorithm based on
-// https://research.swtch.com/glob.
-static bool PatternMatchesString(const std::string& name_str,
-                                 const char* pattern, const char* pattern_end) {
-  const char* name = name_str.c_str();
-  const char* const name_begin = name;
-  const char* const name_end = name + name_str.size();
-
-  const char* pattern_next = pattern;
-  const char* name_next = name;
-
-  while (pattern < pattern_end || name < name_end) {
-    if (pattern < pattern_end) {
-      switch (*pattern) {
-        default:  // Match an ordinary character.
-          if (name < name_end && *name == *pattern) {
-            ++pattern;
-            ++name;
-            continue;
-          }
-          break;
-        case '?':  // Match any single character.
-          if (name < name_end) {
-            ++pattern;
-            ++name;
-            continue;
-          }
-          break;
-        case '*':
-          // Match zero or more characters. Start by skipping over the wildcard
-          // and matching zero characters from name. If that fails, restart and
-          // match one more character than the last attempt.
-          pattern_next = pattern;
-          name_next = name + 1;
-          ++pattern;
-          continue;
-      }
-    }
-    // Failed to match a character. Restart if possible.
-    if (name_begin < name_next && name_next <= name_end) {
-      pattern = pattern_next;
-      name = name_next;
-      continue;
-    }
-    return false;
-  }
-  return true;
-}
-
-bool UnitTestOptions::MatchesFilter(const std::string& name_str,
-                                    const char* filter) {
-  // The filter is a list of patterns separated by colons (:).
-  const char* pattern = filter;
-  while (true) {
-    // Find the bounds of this pattern.
-    const char* const next_sep = strchr(pattern, ':');
-    const char* const pattern_end =
-        next_sep != nullptr ? next_sep : pattern + strlen(pattern);
-
-    // Check if this pattern matches name_str.
-    if (PatternMatchesString(name_str, pattern, pattern_end)) {
-      return true;
-    }
-
-    // Give up on this pattern. However, if we found a pattern separator (:),
-    // advance to the next pattern (skipping over the separator) and restart.
-    if (next_sep == nullptr) {
-      return false;
-    }
-    pattern = next_sep + 1;
-  }
-  return true;
-}
-
-// Returns true if and only if the user-specified filter matches the test
-// suite name and the test name.
-bool UnitTestOptions::FilterMatchesTest(const std::string& test_suite_name,
-                                        const std::string& test_name) {
-  const std::string& full_name = test_suite_name + "." + test_name.c_str();
-
-  // Split --gtest_filter at '-', if there is one, to separate into
-  // positive filter and negative filter portions
-  const char* const p = GTEST_FLAG(filter).c_str();
-  const char* const dash = strchr(p, '-');
-  std::string positive;
-  std::string negative;
-  if (dash == nullptr) {
-    positive = GTEST_FLAG(filter).c_str();  // Whole string is a positive filter
-    negative = "";
-  } else {
-    positive = std::string(p, dash);   // Everything up to the dash
-    negative = std::string(dash + 1);  // Everything after the dash
-    if (positive.empty()) {
-      // Treat '-test1' as the same as '*-test1'
-      positive = kUniversalFilter;
-    }
-  }
-
-  // A filter is a colon-separated list of patterns.  It matches a
-  // test if any pattern in it matches the test.
-  return (MatchesFilter(full_name, positive.c_str()) &&
-          !MatchesFilter(full_name, negative.c_str()));
-}
-
-#if GTEST_HAS_SEH
-// Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
-// given SEH exception, or EXCEPTION_CONTINUE_SEARCH otherwise.
-// This function is useful as an __except condition.
-int UnitTestOptions::GTestShouldProcessSEH(DWORD exception_code) {
-  // Google Test should handle a SEH exception if:
-  //   1. the user wants it to, AND
-  //   2. this is not a breakpoint exception, AND
-  //   3. this is not a C++ exception (VC++ implements them via SEH,
-  //      apparently).
-  //
-  // SEH exception code for C++ exceptions.
-  // (see http://support.microsoft.com/kb/185294 for more information).
-  const DWORD kCxxExceptionCode = 0xe06d7363;
-
-  bool should_handle = true;
-
-  if (!GTEST_FLAG(catch_exceptions))
-    should_handle = false;
-  else if (exception_code == EXCEPTION_BREAKPOINT)
-    should_handle = false;
-  else if (exception_code == kCxxExceptionCode)
-    should_handle = false;
-
-  return should_handle ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH;
-}
-#endif  // GTEST_HAS_SEH
-
-}  // namespace internal
-
-// The c'tor sets this object as the test part result reporter used by
-// Google Test.  The 'result' parameter specifies where to report the
-// results. Intercepts only failures from the current thread.
-ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
-    TestPartResultArray* result)
-    : intercept_mode_(INTERCEPT_ONLY_CURRENT_THREAD),
-      result_(result) {
-  Init();
-}
-
-// The c'tor sets this object as the test part result reporter used by
-// Google Test.  The 'result' parameter specifies where to report the
-// results.
-ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
-    InterceptMode intercept_mode, TestPartResultArray* result)
-    : intercept_mode_(intercept_mode),
-      result_(result) {
-  Init();
-}
-
-void ScopedFakeTestPartResultReporter::Init() {
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
-    old_reporter_ = impl->GetGlobalTestPartResultReporter();
-    impl->SetGlobalTestPartResultReporter(this);
-  } else {
-    old_reporter_ = impl->GetTestPartResultReporterForCurrentThread();
-    impl->SetTestPartResultReporterForCurrentThread(this);
-  }
-}
-
-// The d'tor restores the test part result reporter used by Google Test
-// before.
-ScopedFakeTestPartResultReporter::~ScopedFakeTestPartResultReporter() {
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
-    impl->SetGlobalTestPartResultReporter(old_reporter_);
-  } else {
-    impl->SetTestPartResultReporterForCurrentThread(old_reporter_);
-  }
-}
-
-// Increments the test part result count and remembers the result.
-// This method is from the TestPartResultReporterInterface interface.
-void ScopedFakeTestPartResultReporter::ReportTestPartResult(
-    const TestPartResult& result) {
-  result_->Append(result);
-}
-
-namespace internal {
-
-// Returns the type ID of ::testing::Test.  We should always call this
-// instead of GetTypeId< ::testing::Test>() to get the type ID of
-// testing::Test.  This is to work around a suspected linker bug when
-// using Google Test as a framework on Mac OS X.  The bug causes
-// GetTypeId< ::testing::Test>() to return different values depending
-// on whether the call is from the Google Test framework itself or
-// from user test code.  GetTestTypeId() is guaranteed to always
-// return the same value, as it always calls GetTypeId<>() from the
-// gtest.cc, which is within the Google Test framework.
-TypeId GetTestTypeId() {
-  return GetTypeId<Test>();
-}
-
-// The value of GetTestTypeId() as seen from within the Google Test
-// library.  This is solely for testing GetTestTypeId().
-extern const TypeId kTestTypeIdInGoogleTest = GetTestTypeId();
-
-// This predicate-formatter checks that 'results' contains a test part
-// failure of the given type and that the failure message contains the
-// given substring.
-static AssertionResult HasOneFailure(const char* /* results_expr */,
-                                     const char* /* type_expr */,
-                                     const char* /* substr_expr */,
-                                     const TestPartResultArray& results,
-                                     TestPartResult::Type type,
-                                     const std::string& substr) {
-  const std::string expected(type == TestPartResult::kFatalFailure ?
-                        "1 fatal failure" :
-                        "1 non-fatal failure");
-  Message msg;
-  if (results.size() != 1) {
-    msg << "Expected: " << expected << "\n"
-        << "  Actual: " << results.size() << " failures";
-    for (int i = 0; i < results.size(); i++) {
-      msg << "\n" << results.GetTestPartResult(i);
-    }
-    return AssertionFailure() << msg;
-  }
-
-  const TestPartResult& r = results.GetTestPartResult(0);
-  if (r.type() != type) {
-    return AssertionFailure() << "Expected: " << expected << "\n"
-                              << "  Actual:\n"
-                              << r;
-  }
-
-  if (strstr(r.message(), substr.c_str()) == nullptr) {
-    return AssertionFailure() << "Expected: " << expected << " containing \""
-                              << substr << "\"\n"
-                              << "  Actual:\n"
-                              << r;
-  }
-
-  return AssertionSuccess();
-}
-
-// The constructor of SingleFailureChecker remembers where to look up
-// test part results, what type of failure we expect, and what
-// substring the failure message should contain.
-SingleFailureChecker::SingleFailureChecker(const TestPartResultArray* results,
-                                           TestPartResult::Type type,
-                                           const std::string& substr)
-    : results_(results), type_(type), substr_(substr) {}
-
-// The destructor of SingleFailureChecker verifies that the given
-// TestPartResultArray contains exactly one failure that has the given
-// type and contains the given substring.  If that's not the case, a
-// non-fatal failure will be generated.
-SingleFailureChecker::~SingleFailureChecker() {
-  EXPECT_PRED_FORMAT3(HasOneFailure, *results_, type_, substr_);
-}
-
-DefaultGlobalTestPartResultReporter::DefaultGlobalTestPartResultReporter(
-    UnitTestImpl* unit_test) : unit_test_(unit_test) {}
-
-void DefaultGlobalTestPartResultReporter::ReportTestPartResult(
-    const TestPartResult& result) {
-  unit_test_->current_test_result()->AddTestPartResult(result);
-  unit_test_->listeners()->repeater()->OnTestPartResult(result);
-}
-
-DefaultPerThreadTestPartResultReporter::DefaultPerThreadTestPartResultReporter(
-    UnitTestImpl* unit_test) : unit_test_(unit_test) {}
-
-void DefaultPerThreadTestPartResultReporter::ReportTestPartResult(
-    const TestPartResult& result) {
-  unit_test_->GetGlobalTestPartResultReporter()->ReportTestPartResult(result);
-}
-
-// Returns the global test part result reporter.
-TestPartResultReporterInterface*
-UnitTestImpl::GetGlobalTestPartResultReporter() {
-  internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
-  return global_test_part_result_repoter_;
-}
-
-// Sets the global test part result reporter.
-void UnitTestImpl::SetGlobalTestPartResultReporter(
-    TestPartResultReporterInterface* reporter) {
-  internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
-  global_test_part_result_repoter_ = reporter;
-}
-
-// Returns the test part result reporter for the current thread.
-TestPartResultReporterInterface*
-UnitTestImpl::GetTestPartResultReporterForCurrentThread() {
-  return per_thread_test_part_result_reporter_.get();
-}
-
-// Sets the test part result reporter for the current thread.
-void UnitTestImpl::SetTestPartResultReporterForCurrentThread(
-    TestPartResultReporterInterface* reporter) {
-  per_thread_test_part_result_reporter_.set(reporter);
-}
-
-// Gets the number of successful test suites.
-int UnitTestImpl::successful_test_suite_count() const {
-  return CountIf(test_suites_, TestSuitePassed);
-}
-
-// Gets the number of failed test suites.
-int UnitTestImpl::failed_test_suite_count() const {
-  return CountIf(test_suites_, TestSuiteFailed);
-}
-
-// Gets the number of all test suites.
-int UnitTestImpl::total_test_suite_count() const {
-  return static_cast<int>(test_suites_.size());
-}
-
-// Gets the number of all test suites that contain at least one test
-// that should run.
-int UnitTestImpl::test_suite_to_run_count() const {
-  return CountIf(test_suites_, ShouldRunTestSuite);
-}
-
-// Gets the number of successful tests.
-int UnitTestImpl::successful_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::successful_test_count);
-}
-
-// Gets the number of skipped tests.
-int UnitTestImpl::skipped_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::skipped_test_count);
-}
-
-// Gets the number of failed tests.
-int UnitTestImpl::failed_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::failed_test_count);
-}
-
-// Gets the number of disabled tests that will be reported in the XML report.
-int UnitTestImpl::reportable_disabled_test_count() const {
-  return SumOverTestSuiteList(test_suites_,
-                              &TestSuite::reportable_disabled_test_count);
-}
-
-// Gets the number of disabled tests.
-int UnitTestImpl::disabled_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::disabled_test_count);
-}
-
-// Gets the number of tests to be printed in the XML report.
-int UnitTestImpl::reportable_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::reportable_test_count);
-}
-
-// Gets the number of all tests.
-int UnitTestImpl::total_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::total_test_count);
-}
-
-// Gets the number of tests that should run.
-int UnitTestImpl::test_to_run_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::test_to_run_count);
-}
-
-// Returns the current OS stack trace as an std::string.
-//
-// The maximum number of stack frames to be included is specified by
-// the gtest_stack_trace_depth flag.  The skip_count parameter
-// specifies the number of top frames to be skipped, which doesn't
-// count against the number of frames to be included.
-//
-// For example, if Foo() calls Bar(), which in turn calls
-// CurrentOsStackTraceExceptTop(1), Foo() will be included in the
-// trace but Bar() and CurrentOsStackTraceExceptTop() won't.
-std::string UnitTestImpl::CurrentOsStackTraceExceptTop(int skip_count) {
-  return os_stack_trace_getter()->CurrentStackTrace(
-      static_cast<int>(GTEST_FLAG(stack_trace_depth)),
-      skip_count + 1
-      // Skips the user-specified number of frames plus this function
-      // itself.
-      );  // NOLINT
-}
-
-// A helper class for measuring elapsed times.
-class Timer {
- public:
-  Timer() : start_(std::chrono::steady_clock::now()) {}
-
-  // Return time elapsed in milliseconds since the timer was created.
-  TimeInMillis Elapsed() {
-    return std::chrono::duration_cast<std::chrono::milliseconds>(
-               std::chrono::steady_clock::now() - start_)
-        .count();
-  }
-
- private:
-  std::chrono::steady_clock::time_point start_;
-};
-
-// Returns a timestamp as milliseconds since the epoch. Note this time may jump
-// around subject to adjustments by the system, to measure elapsed time use
-// Timer instead.
-TimeInMillis GetTimeInMillis() {
-  return std::chrono::duration_cast<std::chrono::milliseconds>(
-             std::chrono::system_clock::now() -
-             std::chrono::system_clock::from_time_t(0))
-      .count();
-}
-
-// Utilities
-
-// class String.
-
-#if GTEST_OS_WINDOWS_MOBILE
-// Creates a UTF-16 wide string from the given ANSI string, allocating
-// memory using new. The caller is responsible for deleting the return
-// value using delete[]. Returns the wide string, or NULL if the
-// input is NULL.
-LPCWSTR String::AnsiToUtf16(const char* ansi) {
-  if (!ansi) return nullptr;
-  const int length = strlen(ansi);
-  const int unicode_length =
-      MultiByteToWideChar(CP_ACP, 0, ansi, length, nullptr, 0);
-  WCHAR* unicode = new WCHAR[unicode_length + 1];
-  MultiByteToWideChar(CP_ACP, 0, ansi, length,
-                      unicode, unicode_length);
-  unicode[unicode_length] = 0;
-  return unicode;
-}
-
-// Creates an ANSI string from the given wide string, allocating
-// memory using new. The caller is responsible for deleting the return
-// value using delete[]. Returns the ANSI string, or NULL if the
-// input is NULL.
-const char* String::Utf16ToAnsi(LPCWSTR utf16_str)  {
-  if (!utf16_str) return nullptr;
-  const int ansi_length = WideCharToMultiByte(CP_ACP, 0, utf16_str, -1, nullptr,
-                                              0, nullptr, nullptr);
-  char* ansi = new char[ansi_length + 1];
-  WideCharToMultiByte(CP_ACP, 0, utf16_str, -1, ansi, ansi_length, nullptr,
-                      nullptr);
-  ansi[ansi_length] = 0;
-  return ansi;
-}
-
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-// Compares two C strings.  Returns true if and only if they have the same
-// content.
-//
-// Unlike strcmp(), this function can handle NULL argument(s).  A NULL
-// C string is considered different to any non-NULL C string,
-// including the empty string.
-bool String::CStringEquals(const char * lhs, const char * rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-
-  if (rhs == nullptr) return false;
-
-  return strcmp(lhs, rhs) == 0;
-}
-
-#if GTEST_HAS_STD_WSTRING
-
-// Converts an array of wide chars to a narrow string using the UTF-8
-// encoding, and streams the result to the given Message object.
-static void StreamWideCharsToMessage(const wchar_t* wstr, size_t length,
-                                     Message* msg) {
-  for (size_t i = 0; i != length; ) {  // NOLINT
-    if (wstr[i] != L'\0') {
-      *msg << WideStringToUtf8(wstr + i, static_cast<int>(length - i));
-      while (i != length && wstr[i] != L'\0')
-        i++;
-    } else {
-      *msg << '\0';
-      i++;
-    }
-  }
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-void SplitString(const ::std::string& str, char delimiter,
-                 ::std::vector< ::std::string>* dest) {
-  ::std::vector< ::std::string> parsed;
-  ::std::string::size_type pos = 0;
-  while (::testing::internal::AlwaysTrue()) {
-    const ::std::string::size_type colon = str.find(delimiter, pos);
-    if (colon == ::std::string::npos) {
-      parsed.push_back(str.substr(pos));
-      break;
-    } else {
-      parsed.push_back(str.substr(pos, colon - pos));
-      pos = colon + 1;
-    }
-  }
-  dest->swap(parsed);
-}
-
-}  // namespace internal
-
-// Constructs an empty Message.
-// We allocate the stringstream separately because otherwise each use of
-// ASSERT/EXPECT in a procedure adds over 200 bytes to the procedure's
-// stack frame leading to huge stack frames in some cases; gcc does not reuse
-// the stack space.
-Message::Message() : ss_(new ::std::stringstream) {
-  // By default, we want there to be enough precision when printing
-  // a double to a Message.
-  *ss_ << std::setprecision(std::numeric_limits<double>::digits10 + 2);
-}
-
-// These two overloads allow streaming a wide C string to a Message
-// using the UTF-8 encoding.
-Message& Message::operator <<(const wchar_t* wide_c_str) {
-  return *this << internal::String::ShowWideCString(wide_c_str);
-}
-Message& Message::operator <<(wchar_t* wide_c_str) {
-  return *this << internal::String::ShowWideCString(wide_c_str);
-}
-
-#if GTEST_HAS_STD_WSTRING
-// Converts the given wide string to a narrow string using the UTF-8
-// encoding, and streams the result to this Message object.
-Message& Message::operator <<(const ::std::wstring& wstr) {
-  internal::StreamWideCharsToMessage(wstr.c_str(), wstr.length(), this);
-  return *this;
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Gets the text streamed to this object so far as an std::string.
-// Each '\0' character in the buffer is replaced with "\\0".
-std::string Message::GetString() const {
-  return internal::StringStreamToString(ss_.get());
-}
-
-// AssertionResult constructors.
-// Used in EXPECT_TRUE/FALSE(assertion_result).
-AssertionResult::AssertionResult(const AssertionResult& other)
-    : success_(other.success_),
-      message_(other.message_.get() != nullptr
-                   ? new ::std::string(*other.message_)
-                   : static_cast< ::std::string*>(nullptr)) {}
-
-// Swaps two AssertionResults.
-void AssertionResult::swap(AssertionResult& other) {
-  using std::swap;
-  swap(success_, other.success_);
-  swap(message_, other.message_);
-}
-
-// Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
-AssertionResult AssertionResult::operator!() const {
-  AssertionResult negation(!success_);
-  if (message_.get() != nullptr) negation << *message_;
-  return negation;
-}
-
-// Makes a successful assertion result.
-AssertionResult AssertionSuccess() {
-  return AssertionResult(true);
-}
-
-// Makes a failed assertion result.
-AssertionResult AssertionFailure() {
-  return AssertionResult(false);
-}
-
-// Makes a failed assertion result with the given failure message.
-// Deprecated; use AssertionFailure() << message.
-AssertionResult AssertionFailure(const Message& message) {
-  return AssertionFailure() << message;
-}
-
-namespace internal {
-
-namespace edit_distance {
-std::vector<EditType> CalculateOptimalEdits(const std::vector<size_t>& left,
-                                            const std::vector<size_t>& right) {
-  std::vector<std::vector<double> > costs(
-      left.size() + 1, std::vector<double>(right.size() + 1));
-  std::vector<std::vector<EditType> > best_move(
-      left.size() + 1, std::vector<EditType>(right.size() + 1));
-
-  // Populate for empty right.
-  for (size_t l_i = 0; l_i < costs.size(); ++l_i) {
-    costs[l_i][0] = static_cast<double>(l_i);
-    best_move[l_i][0] = kRemove;
-  }
-  // Populate for empty left.
-  for (size_t r_i = 1; r_i < costs[0].size(); ++r_i) {
-    costs[0][r_i] = static_cast<double>(r_i);
-    best_move[0][r_i] = kAdd;
-  }
-
-  for (size_t l_i = 0; l_i < left.size(); ++l_i) {
-    for (size_t r_i = 0; r_i < right.size(); ++r_i) {
-      if (left[l_i] == right[r_i]) {
-        // Found a match. Consume it.
-        costs[l_i + 1][r_i + 1] = costs[l_i][r_i];
-        best_move[l_i + 1][r_i + 1] = kMatch;
-        continue;
-      }
-
-      const double add = costs[l_i + 1][r_i];
-      const double remove = costs[l_i][r_i + 1];
-      const double replace = costs[l_i][r_i];
-      if (add < remove && add < replace) {
-        costs[l_i + 1][r_i + 1] = add + 1;
-        best_move[l_i + 1][r_i + 1] = kAdd;
-      } else if (remove < add && remove < replace) {
-        costs[l_i + 1][r_i + 1] = remove + 1;
-        best_move[l_i + 1][r_i + 1] = kRemove;
-      } else {
-        // We make replace a little more expensive than add/remove to lower
-        // their priority.
-        costs[l_i + 1][r_i + 1] = replace + 1.00001;
-        best_move[l_i + 1][r_i + 1] = kReplace;
-      }
-    }
-  }
-
-  // Reconstruct the best path. We do it in reverse order.
-  std::vector<EditType> best_path;
-  for (size_t l_i = left.size(), r_i = right.size(); l_i > 0 || r_i > 0;) {
-    EditType move = best_move[l_i][r_i];
-    best_path.push_back(move);
-    l_i -= move != kAdd;
-    r_i -= move != kRemove;
-  }
-  std::reverse(best_path.begin(), best_path.end());
-  return best_path;
-}
-
-namespace {
-
-// Helper class to convert string into ids with deduplication.
-class InternalStrings {
- public:
-  size_t GetId(const std::string& str) {
-    IdMap::iterator it = ids_.find(str);
-    if (it != ids_.end()) return it->second;
-    size_t id = ids_.size();
-    return ids_[str] = id;
-  }
-
- private:
-  typedef std::map<std::string, size_t> IdMap;
-  IdMap ids_;
-};
-
-}  // namespace
-
-std::vector<EditType> CalculateOptimalEdits(
-    const std::vector<std::string>& left,
-    const std::vector<std::string>& right) {
-  std::vector<size_t> left_ids, right_ids;
-  {
-    InternalStrings intern_table;
-    for (size_t i = 0; i < left.size(); ++i) {
-      left_ids.push_back(intern_table.GetId(left[i]));
-    }
-    for (size_t i = 0; i < right.size(); ++i) {
-      right_ids.push_back(intern_table.GetId(right[i]));
-    }
-  }
-  return CalculateOptimalEdits(left_ids, right_ids);
-}
-
-namespace {
-
-// Helper class that holds the state for one hunk and prints it out to the
-// stream.
-// It reorders adds/removes when possible to group all removes before all
-// adds. It also adds the hunk header before printint into the stream.
-class Hunk {
- public:
-  Hunk(size_t left_start, size_t right_start)
-      : left_start_(left_start),
-        right_start_(right_start),
-        adds_(),
-        removes_(),
-        common_() {}
-
-  void PushLine(char edit, const char* line) {
-    switch (edit) {
-      case ' ':
-        ++common_;
-        FlushEdits();
-        hunk_.push_back(std::make_pair(' ', line));
-        break;
-      case '-':
-        ++removes_;
-        hunk_removes_.push_back(std::make_pair('-', line));
-        break;
-      case '+':
-        ++adds_;
-        hunk_adds_.push_back(std::make_pair('+', line));
-        break;
-    }
-  }
-
-  void PrintTo(std::ostream* os) {
-    PrintHeader(os);
-    FlushEdits();
-    for (std::list<std::pair<char, const char*> >::const_iterator it =
-             hunk_.begin();
-         it != hunk_.end(); ++it) {
-      *os << it->first << it->second << "\n";
-    }
-  }
-
-  bool has_edits() const { return adds_ || removes_; }
-
- private:
-  void FlushEdits() {
-    hunk_.splice(hunk_.end(), hunk_removes_);
-    hunk_.splice(hunk_.end(), hunk_adds_);
-  }
-
-  // Print a unified diff header for one hunk.
-  // The format is
-  //   "@@ -<left_start>,<left_length> +<right_start>,<right_length> @@"
-  // where the left/right parts are omitted if unnecessary.
-  void PrintHeader(std::ostream* ss) const {
-    *ss << "@@ ";
-    if (removes_) {
-      *ss << "-" << left_start_ << "," << (removes_ + common_);
-    }
-    if (removes_ && adds_) {
-      *ss << " ";
-    }
-    if (adds_) {
-      *ss << "+" << right_start_ << "," << (adds_ + common_);
-    }
-    *ss << " @@\n";
-  }
-
-  size_t left_start_, right_start_;
-  size_t adds_, removes_, common_;
-  std::list<std::pair<char, const char*> > hunk_, hunk_adds_, hunk_removes_;
-};
-
-}  // namespace
-
-// Create a list of diff hunks in Unified diff format.
-// Each hunk has a header generated by PrintHeader above plus a body with
-// lines prefixed with ' ' for no change, '-' for deletion and '+' for
-// addition.
-// 'context' represents the desired unchanged prefix/suffix around the diff.
-// If two hunks are close enough that their contexts overlap, then they are
-// joined into one hunk.
-std::string CreateUnifiedDiff(const std::vector<std::string>& left,
-                              const std::vector<std::string>& right,
-                              size_t context) {
-  const std::vector<EditType> edits = CalculateOptimalEdits(left, right);
-
-  size_t l_i = 0, r_i = 0, edit_i = 0;
-  std::stringstream ss;
-  while (edit_i < edits.size()) {
-    // Find first edit.
-    while (edit_i < edits.size() && edits[edit_i] == kMatch) {
-      ++l_i;
-      ++r_i;
-      ++edit_i;
-    }
-
-    // Find the first line to include in the hunk.
-    const size_t prefix_context = std::min(l_i, context);
-    Hunk hunk(l_i - prefix_context + 1, r_i - prefix_context + 1);
-    for (size_t i = prefix_context; i > 0; --i) {
-      hunk.PushLine(' ', left[l_i - i].c_str());
-    }
-
-    // Iterate the edits until we found enough suffix for the hunk or the input
-    // is over.
-    size_t n_suffix = 0;
-    for (; edit_i < edits.size(); ++edit_i) {
-      if (n_suffix >= context) {
-        // Continue only if the next hunk is very close.
-        auto it = edits.begin() + static_cast<int>(edit_i);
-        while (it != edits.end() && *it == kMatch) ++it;
-        if (it == edits.end() ||
-            static_cast<size_t>(it - edits.begin()) - edit_i >= context) {
-          // There is no next edit or it is too far away.
-          break;
-        }
-      }
-
-      EditType edit = edits[edit_i];
-      // Reset count when a non match is found.
-      n_suffix = edit == kMatch ? n_suffix + 1 : 0;
-
-      if (edit == kMatch || edit == kRemove || edit == kReplace) {
-        hunk.PushLine(edit == kMatch ? ' ' : '-', left[l_i].c_str());
-      }
-      if (edit == kAdd || edit == kReplace) {
-        hunk.PushLine('+', right[r_i].c_str());
-      }
-
-      // Advance indices, depending on edit type.
-      l_i += edit != kAdd;
-      r_i += edit != kRemove;
-    }
-
-    if (!hunk.has_edits()) {
-      // We are done. We don't want this hunk.
-      break;
-    }
-
-    hunk.PrintTo(&ss);
-  }
-  return ss.str();
-}
-
-}  // namespace edit_distance
-
-namespace {
-
-// The string representation of the values received in EqFailure() are already
-// escaped. Split them on escaped '\n' boundaries. Leave all other escaped
-// characters the same.
-std::vector<std::string> SplitEscapedString(const std::string& str) {
-  std::vector<std::string> lines;
-  size_t start = 0, end = str.size();
-  if (end > 2 && str[0] == '"' && str[end - 1] == '"') {
-    ++start;
-    --end;
-  }
-  bool escaped = false;
-  for (size_t i = start; i + 1 < end; ++i) {
-    if (escaped) {
-      escaped = false;
-      if (str[i] == 'n') {
-        lines.push_back(str.substr(start, i - start - 1));
-        start = i + 1;
-      }
-    } else {
-      escaped = str[i] == '\\';
-    }
-  }
-  lines.push_back(str.substr(start, end - start));
-  return lines;
-}
-
-}  // namespace
-
-// Constructs and returns the message for an equality assertion
-// (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
-//
-// The first four parameters are the expressions used in the assertion
-// and their values, as strings.  For example, for ASSERT_EQ(foo, bar)
-// where foo is 5 and bar is 6, we have:
-//
-//   lhs_expression: "foo"
-//   rhs_expression: "bar"
-//   lhs_value:      "5"
-//   rhs_value:      "6"
-//
-// The ignoring_case parameter is true if and only if the assertion is a
-// *_STRCASEEQ*.  When it's true, the string "Ignoring case" will
-// be inserted into the message.
-AssertionResult EqFailure(const char* lhs_expression,
-                          const char* rhs_expression,
-                          const std::string& lhs_value,
-                          const std::string& rhs_value,
-                          bool ignoring_case) {
-  Message msg;
-  msg << "Expected equality of these values:";
-  msg << "\n  " << lhs_expression;
-  if (lhs_value != lhs_expression) {
-    msg << "\n    Which is: " << lhs_value;
-  }
-  msg << "\n  " << rhs_expression;
-  if (rhs_value != rhs_expression) {
-    msg << "\n    Which is: " << rhs_value;
-  }
-
-  if (ignoring_case) {
-    msg << "\nIgnoring case";
-  }
-
-  if (!lhs_value.empty() && !rhs_value.empty()) {
-    const std::vector<std::string> lhs_lines =
-        SplitEscapedString(lhs_value);
-    const std::vector<std::string> rhs_lines =
-        SplitEscapedString(rhs_value);
-    if (lhs_lines.size() > 1 || rhs_lines.size() > 1) {
-      msg << "\nWith diff:\n"
-          << edit_distance::CreateUnifiedDiff(lhs_lines, rhs_lines);
-    }
-  }
-
-  return AssertionFailure() << msg;
-}
-
-// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
-std::string GetBoolAssertionFailureMessage(
-    const AssertionResult& assertion_result,
-    const char* expression_text,
-    const char* actual_predicate_value,
-    const char* expected_predicate_value) {
-  const char* actual_message = assertion_result.message();
-  Message msg;
-  msg << "Value of: " << expression_text
-      << "\n  Actual: " << actual_predicate_value;
-  if (actual_message[0] != '\0')
-    msg << " (" << actual_message << ")";
-  msg << "\nExpected: " << expected_predicate_value;
-  return msg.GetString();
-}
-
-// Helper function for implementing ASSERT_NEAR.
-AssertionResult DoubleNearPredFormat(const char* expr1,
-                                     const char* expr2,
-                                     const char* abs_error_expr,
-                                     double val1,
-                                     double val2,
-                                     double abs_error) {
-  const double diff = fabs(val1 - val2);
-  if (diff <= abs_error) return AssertionSuccess();
-
-  // Find the value which is closest to zero.
-  const double min_abs = std::min(fabs(val1), fabs(val2));
-  // Find the distance to the next double from that value.
-  const double epsilon =
-      nextafter(min_abs, std::numeric_limits<double>::infinity()) - min_abs;
-  // Detect the case where abs_error is so small that EXPECT_NEAR is
-  // effectively the same as EXPECT_EQUAL, and give an informative error
-  // message so that the situation can be more easily understood without
-  // requiring exotic floating-point knowledge.
-  // Don't do an epsilon check if abs_error is zero because that implies
-  // that an equality check was actually intended.
-  if (!(std::isnan)(val1) && !(std::isnan)(val2) && abs_error > 0 &&
-      abs_error < epsilon) {
-    return AssertionFailure()
-           << "The difference between " << expr1 << " and " << expr2 << " is "
-           << diff << ", where\n"
-           << expr1 << " evaluates to " << val1 << ",\n"
-           << expr2 << " evaluates to " << val2 << ".\nThe abs_error parameter "
-           << abs_error_expr << " evaluates to " << abs_error
-           << " which is smaller than the minimum distance between doubles for "
-              "numbers of this magnitude which is "
-           << epsilon
-           << ", thus making this EXPECT_NEAR check equivalent to "
-              "EXPECT_EQUAL. Consider using EXPECT_DOUBLE_EQ instead.";
-  }
-  return AssertionFailure()
-      << "The difference between " << expr1 << " and " << expr2
-      << " is " << diff << ", which exceeds " << abs_error_expr << ", where\n"
-      << expr1 << " evaluates to " << val1 << ",\n"
-      << expr2 << " evaluates to " << val2 << ", and\n"
-      << abs_error_expr << " evaluates to " << abs_error << ".";
-}
-
-
-// Helper template for implementing FloatLE() and DoubleLE().
-template <typename RawType>
-AssertionResult FloatingPointLE(const char* expr1,
-                                const char* expr2,
-                                RawType val1,
-                                RawType val2) {
-  // Returns success if val1 is less than val2,
-  if (val1 < val2) {
-    return AssertionSuccess();
-  }
-
-  // or if val1 is almost equal to val2.
-  const FloatingPoint<RawType> lhs(val1), rhs(val2);
-  if (lhs.AlmostEquals(rhs)) {
-    return AssertionSuccess();
-  }
-
-  // Note that the above two checks will both fail if either val1 or
-  // val2 is NaN, as the IEEE floating-point standard requires that
-  // any predicate involving a NaN must return false.
-
-  ::std::stringstream val1_ss;
-  val1_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-          << val1;
-
-  ::std::stringstream val2_ss;
-  val2_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-          << val2;
-
-  return AssertionFailure()
-      << "Expected: (" << expr1 << ") <= (" << expr2 << ")\n"
-      << "  Actual: " << StringStreamToString(&val1_ss) << " vs "
-      << StringStreamToString(&val2_ss);
-}
-
-}  // namespace internal
-
-// Asserts that val1 is less than, or almost equal to, val2.  Fails
-// otherwise.  In particular, it fails if either val1 or val2 is NaN.
-AssertionResult FloatLE(const char* expr1, const char* expr2,
-                        float val1, float val2) {
-  return internal::FloatingPointLE<float>(expr1, expr2, val1, val2);
-}
-
-// Asserts that val1 is less than, or almost equal to, val2.  Fails
-// otherwise.  In particular, it fails if either val1 or val2 is NaN.
-AssertionResult DoubleLE(const char* expr1, const char* expr2,
-                         double val1, double val2) {
-  return internal::FloatingPointLE<double>(expr1, expr2, val1, val2);
-}
-
-namespace internal {
-
-// The helper function for {ASSERT|EXPECT}_STREQ.
-AssertionResult CmpHelperSTREQ(const char* lhs_expression,
-                               const char* rhs_expression,
-                               const char* lhs,
-                               const char* rhs) {
-  if (String::CStringEquals(lhs, rhs)) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   PrintToString(lhs),
-                   PrintToString(rhs),
-                   false);
-}
-
-// The helper function for {ASSERT|EXPECT}_STRCASEEQ.
-AssertionResult CmpHelperSTRCASEEQ(const char* lhs_expression,
-                                   const char* rhs_expression,
-                                   const char* lhs,
-                                   const char* rhs) {
-  if (String::CaseInsensitiveCStringEquals(lhs, rhs)) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   PrintToString(lhs),
-                   PrintToString(rhs),
-                   true);
-}
-
-// The helper function for {ASSERT|EXPECT}_STRNE.
-AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                               const char* s2_expression,
-                               const char* s1,
-                               const char* s2) {
-  if (!String::CStringEquals(s1, s2)) {
-    return AssertionSuccess();
-  } else {
-    return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
-                              << s2_expression << "), actual: \""
-                              << s1 << "\" vs \"" << s2 << "\"";
-  }
-}
-
-// The helper function for {ASSERT|EXPECT}_STRCASENE.
-AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
-                                   const char* s2_expression,
-                                   const char* s1,
-                                   const char* s2) {
-  if (!String::CaseInsensitiveCStringEquals(s1, s2)) {
-    return AssertionSuccess();
-  } else {
-    return AssertionFailure()
-        << "Expected: (" << s1_expression << ") != ("
-        << s2_expression << ") (ignoring case), actual: \""
-        << s1 << "\" vs \"" << s2 << "\"";
-  }
-}
-
-}  // namespace internal
-
-namespace {
-
-// Helper functions for implementing IsSubString() and IsNotSubstring().
-
-// This group of overloaded functions return true if and only if needle
-// is a substring of haystack.  NULL is considered a substring of
-// itself only.
-
-bool IsSubstringPred(const char* needle, const char* haystack) {
-  if (needle == nullptr || haystack == nullptr) return needle == haystack;
-
-  return strstr(haystack, needle) != nullptr;
-}
-
-bool IsSubstringPred(const wchar_t* needle, const wchar_t* haystack) {
-  if (needle == nullptr || haystack == nullptr) return needle == haystack;
-
-  return wcsstr(haystack, needle) != nullptr;
-}
-
-// StringType here can be either ::std::string or ::std::wstring.
-template <typename StringType>
-bool IsSubstringPred(const StringType& needle,
-                     const StringType& haystack) {
-  return haystack.find(needle) != StringType::npos;
-}
-
-// This function implements either IsSubstring() or IsNotSubstring(),
-// depending on the value of the expected_to_be_substring parameter.
-// StringType here can be const char*, const wchar_t*, ::std::string,
-// or ::std::wstring.
-template <typename StringType>
-AssertionResult IsSubstringImpl(
-    bool expected_to_be_substring,
-    const char* needle_expr, const char* haystack_expr,
-    const StringType& needle, const StringType& haystack) {
-  if (IsSubstringPred(needle, haystack) == expected_to_be_substring)
-    return AssertionSuccess();
-
-  const bool is_wide_string = sizeof(needle[0]) > 1;
-  const char* const begin_string_quote = is_wide_string ? "L\"" : "\"";
-  return AssertionFailure()
-      << "Value of: " << needle_expr << "\n"
-      << "  Actual: " << begin_string_quote << needle << "\"\n"
-      << "Expected: " << (expected_to_be_substring ? "" : "not ")
-      << "a substring of " << haystack_expr << "\n"
-      << "Which is: " << begin_string_quote << haystack << "\"";
-}
-
-}  // namespace
-
-// IsSubstring() and IsNotSubstring() check whether needle is a
-// substring of haystack (NULL is considered a substring of itself
-// only), and return an appropriate error message when they fail.
-
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-
-#if GTEST_HAS_STD_WSTRING
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-namespace internal {
-
-#if GTEST_OS_WINDOWS
-
-namespace {
-
-// Helper function for IsHRESULT{SuccessFailure} predicates
-AssertionResult HRESULTFailureHelper(const char* expr,
-                                     const char* expected,
-                                     long hr) {  // NOLINT
-# if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_TV_TITLE
-
-  // Windows CE doesn't support FormatMessage.
-  const char error_text[] = "";
-
-# else
-
-  // Looks up the human-readable system message for the HRESULT code
-  // and since we're not passing any params to FormatMessage, we don't
-  // want inserts expanded.
-  const DWORD kFlags = FORMAT_MESSAGE_FROM_SYSTEM |
-                       FORMAT_MESSAGE_IGNORE_INSERTS;
-  const DWORD kBufSize = 4096;
-  // Gets the system's human readable message string for this HRESULT.
-  char error_text[kBufSize] = { '\0' };
-  DWORD message_length = ::FormatMessageA(kFlags,
-                                          0,   // no source, we're asking system
-                                          static_cast<DWORD>(hr),  // the error
-                                          0,   // no line width restrictions
-                                          error_text,  // output buffer
-                                          kBufSize,    // buf size
-                                          nullptr);  // no arguments for inserts
-  // Trims tailing white space (FormatMessage leaves a trailing CR-LF)
-  for (; message_length && IsSpace(error_text[message_length - 1]);
-          --message_length) {
-    error_text[message_length - 1] = '\0';
-  }
-
-# endif  // GTEST_OS_WINDOWS_MOBILE
-
-  const std::string error_hex("0x" + String::FormatHexInt(hr));
-  return ::testing::AssertionFailure()
-      << "Expected: " << expr << " " << expected << ".\n"
-      << "  Actual: " << error_hex << " " << error_text << "\n";
-}
-
-}  // namespace
-
-AssertionResult IsHRESULTSuccess(const char* expr, long hr) {  // NOLINT
-  if (SUCCEEDED(hr)) {
-    return AssertionSuccess();
-  }
-  return HRESULTFailureHelper(expr, "succeeds", hr);
-}
-
-AssertionResult IsHRESULTFailure(const char* expr, long hr) {  // NOLINT
-  if (FAILED(hr)) {
-    return AssertionSuccess();
-  }
-  return HRESULTFailureHelper(expr, "fails", hr);
-}
-
-#endif  // GTEST_OS_WINDOWS
-
-// Utility functions for encoding Unicode text (wide strings) in
-// UTF-8.
-
-// A Unicode code-point can have up to 21 bits, and is encoded in UTF-8
-// like this:
-//
-// Code-point length   Encoding
-//   0 -  7 bits       0xxxxxxx
-//   8 - 11 bits       110xxxxx 10xxxxxx
-//  12 - 16 bits       1110xxxx 10xxxxxx 10xxxxxx
-//  17 - 21 bits       11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
-
-// The maximum code-point a one-byte UTF-8 sequence can represent.
-constexpr uint32_t kMaxCodePoint1 = (static_cast<uint32_t>(1) <<  7) - 1;
-
-// The maximum code-point a two-byte UTF-8 sequence can represent.
-constexpr uint32_t kMaxCodePoint2 = (static_cast<uint32_t>(1) << (5 + 6)) - 1;
-
-// The maximum code-point a three-byte UTF-8 sequence can represent.
-constexpr uint32_t kMaxCodePoint3 = (static_cast<uint32_t>(1) << (4 + 2*6)) - 1;
-
-// The maximum code-point a four-byte UTF-8 sequence can represent.
-constexpr uint32_t kMaxCodePoint4 = (static_cast<uint32_t>(1) << (3 + 3*6)) - 1;
-
-// Chops off the n lowest bits from a bit pattern.  Returns the n
-// lowest bits.  As a side effect, the original bit pattern will be
-// shifted to the right by n bits.
-inline uint32_t ChopLowBits(uint32_t* bits, int n) {
-  const uint32_t low_bits = *bits & ((static_cast<uint32_t>(1) << n) - 1);
-  *bits >>= n;
-  return low_bits;
-}
-
-// Converts a Unicode code point to a narrow string in UTF-8 encoding.
-// code_point parameter is of type uint32_t because wchar_t may not be
-// wide enough to contain a code point.
-// If the code_point is not a valid Unicode code point
-// (i.e. outside of Unicode range U+0 to U+10FFFF) it will be converted
-// to "(Invalid Unicode 0xXXXXXXXX)".
-std::string CodePointToUtf8(uint32_t code_point) {
-  if (code_point > kMaxCodePoint4) {
-    return "(Invalid Unicode 0x" + String::FormatHexUInt32(code_point) + ")";
-  }
-
-  char str[5];  // Big enough for the largest valid code point.
-  if (code_point <= kMaxCodePoint1) {
-    str[1] = '\0';
-    str[0] = static_cast<char>(code_point);                          // 0xxxxxxx
-  } else if (code_point <= kMaxCodePoint2) {
-    str[2] = '\0';
-    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[0] = static_cast<char>(0xC0 | code_point);                   // 110xxxxx
-  } else if (code_point <= kMaxCodePoint3) {
-    str[3] = '\0';
-    str[2] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[0] = static_cast<char>(0xE0 | code_point);                   // 1110xxxx
-  } else {  // code_point <= kMaxCodePoint4
-    str[4] = '\0';
-    str[3] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[2] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[0] = static_cast<char>(0xF0 | code_point);                   // 11110xxx
-  }
-  return str;
-}
-
-// The following two functions only make sense if the system
-// uses UTF-16 for wide string encoding. All supported systems
-// with 16 bit wchar_t (Windows, Cygwin) do use UTF-16.
-
-// Determines if the arguments constitute UTF-16 surrogate pair
-// and thus should be combined into a single Unicode code point
-// using CreateCodePointFromUtf16SurrogatePair.
-inline bool IsUtf16SurrogatePair(wchar_t first, wchar_t second) {
-  return sizeof(wchar_t) == 2 &&
-      (first & 0xFC00) == 0xD800 && (second & 0xFC00) == 0xDC00;
-}
-
-// Creates a Unicode code point from UTF16 surrogate pair.
-inline uint32_t CreateCodePointFromUtf16SurrogatePair(wchar_t first,
-                                                      wchar_t second) {
-  const auto first_u = static_cast<uint32_t>(first);
-  const auto second_u = static_cast<uint32_t>(second);
-  const uint32_t mask = (1 << 10) - 1;
-  return (sizeof(wchar_t) == 2)
-             ? (((first_u & mask) << 10) | (second_u & mask)) + 0x10000
-             :
-             // This function should not be called when the condition is
-             // false, but we provide a sensible default in case it is.
-             first_u;
-}
-
-// Converts a wide string to a narrow string in UTF-8 encoding.
-// The wide string is assumed to have the following encoding:
-//   UTF-16 if sizeof(wchar_t) == 2 (on Windows, Cygwin)
-//   UTF-32 if sizeof(wchar_t) == 4 (on Linux)
-// Parameter str points to a null-terminated wide string.
-// Parameter num_chars may additionally limit the number
-// of wchar_t characters processed. -1 is used when the entire string
-// should be processed.
-// If the string contains code points that are not valid Unicode code points
-// (i.e. outside of Unicode range U+0 to U+10FFFF) they will be output
-// as '(Invalid Unicode 0xXXXXXXXX)'. If the string is in UTF16 encoding
-// and contains invalid UTF-16 surrogate pairs, values in those pairs
-// will be encoded as individual Unicode characters from Basic Normal Plane.
-std::string WideStringToUtf8(const wchar_t* str, int num_chars) {
-  if (num_chars == -1)
-    num_chars = static_cast<int>(wcslen(str));
-
-  ::std::stringstream stream;
-  for (int i = 0; i < num_chars; ++i) {
-    uint32_t unicode_code_point;
-
-    if (str[i] == L'\0') {
-      break;
-    } else if (i + 1 < num_chars && IsUtf16SurrogatePair(str[i], str[i + 1])) {
-      unicode_code_point = CreateCodePointFromUtf16SurrogatePair(str[i],
-                                                                 str[i + 1]);
-      i++;
-    } else {
-      unicode_code_point = static_cast<uint32_t>(str[i]);
-    }
-
-    stream << CodePointToUtf8(unicode_code_point);
-  }
-  return StringStreamToString(&stream);
-}
-
-// Converts a wide C string to an std::string using the UTF-8 encoding.
-// NULL will be converted to "(null)".
-std::string String::ShowWideCString(const wchar_t * wide_c_str) {
-  if (wide_c_str == nullptr) return "(null)";
-
-  return internal::WideStringToUtf8(wide_c_str, -1);
-}
-
-// Compares two wide C strings.  Returns true if and only if they have the
-// same content.
-//
-// Unlike wcscmp(), this function can handle NULL argument(s).  A NULL
-// C string is considered different to any non-NULL C string,
-// including the empty string.
-bool String::WideCStringEquals(const wchar_t * lhs, const wchar_t * rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-
-  if (rhs == nullptr) return false;
-
-  return wcscmp(lhs, rhs) == 0;
-}
-
-// Helper function for *_STREQ on wide strings.
-AssertionResult CmpHelperSTREQ(const char* lhs_expression,
-                               const char* rhs_expression,
-                               const wchar_t* lhs,
-                               const wchar_t* rhs) {
-  if (String::WideCStringEquals(lhs, rhs)) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   PrintToString(lhs),
-                   PrintToString(rhs),
-                   false);
-}
-
-// Helper function for *_STRNE on wide strings.
-AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                               const char* s2_expression,
-                               const wchar_t* s1,
-                               const wchar_t* s2) {
-  if (!String::WideCStringEquals(s1, s2)) {
-    return AssertionSuccess();
-  }
-
-  return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
-                            << s2_expression << "), actual: "
-                            << PrintToString(s1)
-                            << " vs " << PrintToString(s2);
-}
-
-// Compares two C strings, ignoring case.  Returns true if and only if they have
-// the same content.
-//
-// Unlike strcasecmp(), this function can handle NULL argument(s).  A
-// NULL C string is considered different to any non-NULL C string,
-// including the empty string.
-bool String::CaseInsensitiveCStringEquals(const char * lhs, const char * rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-  if (rhs == nullptr) return false;
-  return posix::StrCaseCmp(lhs, rhs) == 0;
-}
-
-// Compares two wide C strings, ignoring case.  Returns true if and only if they
-// have the same content.
-//
-// Unlike wcscasecmp(), this function can handle NULL argument(s).
-// A NULL C string is considered different to any non-NULL wide C string,
-// including the empty string.
-// NB: The implementations on different platforms slightly differ.
-// On windows, this method uses _wcsicmp which compares according to LC_CTYPE
-// environment variable. On GNU platform this method uses wcscasecmp
-// which compares according to LC_CTYPE category of the current locale.
-// On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
-// current locale.
-bool String::CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
-                                              const wchar_t* rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-
-  if (rhs == nullptr) return false;
-
-#if GTEST_OS_WINDOWS
-  return _wcsicmp(lhs, rhs) == 0;
-#elif GTEST_OS_LINUX && !GTEST_OS_LINUX_ANDROID
-  return wcscasecmp(lhs, rhs) == 0;
-#else
-  // Android, Mac OS X and Cygwin don't define wcscasecmp.
-  // Other unknown OSes may not define it either.
-  wint_t left, right;
-  do {
-    left = towlower(static_cast<wint_t>(*lhs++));
-    right = towlower(static_cast<wint_t>(*rhs++));
-  } while (left && left == right);
-  return left == right;
-#endif  // OS selector
-}
-
-// Returns true if and only if str ends with the given suffix, ignoring case.
-// Any string is considered to end with an empty suffix.
-bool String::EndsWithCaseInsensitive(
-    const std::string& str, const std::string& suffix) {
-  const size_t str_len = str.length();
-  const size_t suffix_len = suffix.length();
-  return (str_len >= suffix_len) &&
-         CaseInsensitiveCStringEquals(str.c_str() + str_len - suffix_len,
-                                      suffix.c_str());
-}
-
-// Formats an int value as "%02d".
-std::string String::FormatIntWidth2(int value) {
-  return FormatIntWidthN(value, 2);
-}
-
-// Formats an int value to given width with leading zeros.
-std::string String::FormatIntWidthN(int value, int width) {
-  std::stringstream ss;
-  ss << std::setfill('0') << std::setw(width) << value;
-  return ss.str();
-}
-
-// Formats an int value as "%X".
-std::string String::FormatHexUInt32(uint32_t value) {
-  std::stringstream ss;
-  ss << std::hex << std::uppercase << value;
-  return ss.str();
-}
-
-// Formats an int value as "%X".
-std::string String::FormatHexInt(int value) {
-  return FormatHexUInt32(static_cast<uint32_t>(value));
-}
-
-// Formats a byte as "%02X".
-std::string String::FormatByte(unsigned char value) {
-  std::stringstream ss;
-  ss << std::setfill('0') << std::setw(2) << std::hex << std::uppercase
-     << static_cast<unsigned int>(value);
-  return ss.str();
-}
-
-// Converts the buffer in a stringstream to an std::string, converting NUL
-// bytes to "\\0" along the way.
-std::string StringStreamToString(::std::stringstream* ss) {
-  const ::std::string& str = ss->str();
-  const char* const start = str.c_str();
-  const char* const end = start + str.length();
-
-  std::string result;
-  result.reserve(static_cast<size_t>(2 * (end - start)));
-  for (const char* ch = start; ch != end; ++ch) {
-    if (*ch == '\0') {
-      result += "\\0";  // Replaces NUL with "\\0";
-    } else {
-      result += *ch;
-    }
-  }
-
-  return result;
-}
-
-// Appends the user-supplied message to the Google-Test-generated message.
-std::string AppendUserMessage(const std::string& gtest_msg,
-                              const Message& user_msg) {
-  // Appends the user message if it's non-empty.
-  const std::string user_msg_string = user_msg.GetString();
-  if (user_msg_string.empty()) {
-    return gtest_msg;
-  }
-  if (gtest_msg.empty()) {
-    return user_msg_string;
-  }
-  return gtest_msg + "\n" + user_msg_string;
-}
-
-}  // namespace internal
-
-// class TestResult
-
-// Creates an empty TestResult.
-TestResult::TestResult()
-    : death_test_count_(0), start_timestamp_(0), elapsed_time_(0) {}
-
-// D'tor.
-TestResult::~TestResult() {
-}
-
-// Returns the i-th test part result among all the results. i can
-// range from 0 to total_part_count() - 1. If i is not in that range,
-// aborts the program.
-const TestPartResult& TestResult::GetTestPartResult(int i) const {
-  if (i < 0 || i >= total_part_count())
-    internal::posix::Abort();
-  return test_part_results_.at(static_cast<size_t>(i));
-}
-
-// Returns the i-th test property. i can range from 0 to
-// test_property_count() - 1. If i is not in that range, aborts the
-// program.
-const TestProperty& TestResult::GetTestProperty(int i) const {
-  if (i < 0 || i >= test_property_count())
-    internal::posix::Abort();
-  return test_properties_.at(static_cast<size_t>(i));
-}
-
-// Clears the test part results.
-void TestResult::ClearTestPartResults() {
-  test_part_results_.clear();
-}
-
-// Adds a test part result to the list.
-void TestResult::AddTestPartResult(const TestPartResult& test_part_result) {
-  test_part_results_.push_back(test_part_result);
-}
-
-// Adds a test property to the list. If a property with the same key as the
-// supplied property is already represented, the value of this test_property
-// replaces the old value for that key.
-void TestResult::RecordProperty(const std::string& xml_element,
-                                const TestProperty& test_property) {
-  if (!ValidateTestProperty(xml_element, test_property)) {
-    return;
-  }
-  internal::MutexLock lock(&test_properties_mutex_);
-  const std::vector<TestProperty>::iterator property_with_matching_key =
-      std::find_if(test_properties_.begin(), test_properties_.end(),
-                   internal::TestPropertyKeyIs(test_property.key()));
-  if (property_with_matching_key == test_properties_.end()) {
-    test_properties_.push_back(test_property);
-    return;
-  }
-  property_with_matching_key->SetValue(test_property.value());
-}
-
-// The list of reserved attributes used in the <testsuites> element of XML
-// output.
-static const char* const kReservedTestSuitesAttributes[] = {
-  "disabled",
-  "errors",
-  "failures",
-  "name",
-  "random_seed",
-  "tests",
-  "time",
-  "timestamp"
-};
-
-// The list of reserved attributes used in the <testsuite> element of XML
-// output.
-static const char* const kReservedTestSuiteAttributes[] = {
-    "disabled", "errors", "failures",  "name",
-    "tests",    "time",   "timestamp", "skipped"};
-
-// The list of reserved attributes used in the <testcase> element of XML output.
-static const char* const kReservedTestCaseAttributes[] = {
-    "classname",   "name", "status", "time",  "type_param",
-    "value_param", "file", "line"};
-
-// Use a slightly different set for allowed output to ensure existing tests can
-// still RecordProperty("result") or "RecordProperty(timestamp")
-static const char* const kReservedOutputTestCaseAttributes[] = {
-    "classname",   "name", "status", "time",   "type_param",
-    "value_param", "file", "line",   "result", "timestamp"};
-
-template <size_t kSize>
-std::vector<std::string> ArrayAsVector(const char* const (&array)[kSize]) {
-  return std::vector<std::string>(array, array + kSize);
-}
-
-static std::vector<std::string> GetReservedAttributesForElement(
-    const std::string& xml_element) {
-  if (xml_element == "testsuites") {
-    return ArrayAsVector(kReservedTestSuitesAttributes);
-  } else if (xml_element == "testsuite") {
-    return ArrayAsVector(kReservedTestSuiteAttributes);
-  } else if (xml_element == "testcase") {
-    return ArrayAsVector(kReservedTestCaseAttributes);
-  } else {
-    GTEST_CHECK_(false) << "Unrecognized xml_element provided: " << xml_element;
-  }
-  // This code is unreachable but some compilers may not realizes that.
-  return std::vector<std::string>();
-}
-
-// TODO(jdesprez): Merge the two getReserved attributes once skip is improved
-static std::vector<std::string> GetReservedOutputAttributesForElement(
-    const std::string& xml_element) {
-  if (xml_element == "testsuites") {
-    return ArrayAsVector(kReservedTestSuitesAttributes);
-  } else if (xml_element == "testsuite") {
-    return ArrayAsVector(kReservedTestSuiteAttributes);
-  } else if (xml_element == "testcase") {
-    return ArrayAsVector(kReservedOutputTestCaseAttributes);
-  } else {
-    GTEST_CHECK_(false) << "Unrecognized xml_element provided: " << xml_element;
-  }
-  // This code is unreachable but some compilers may not realizes that.
-  return std::vector<std::string>();
-}
-
-static std::string FormatWordList(const std::vector<std::string>& words) {
-  Message word_list;
-  for (size_t i = 0; i < words.size(); ++i) {
-    if (i > 0 && words.size() > 2) {
-      word_list << ", ";
-    }
-    if (i == words.size() - 1) {
-      word_list << "and ";
-    }
-    word_list << "'" << words[i] << "'";
-  }
-  return word_list.GetString();
-}
-
-static bool ValidateTestPropertyName(
-    const std::string& property_name,
-    const std::vector<std::string>& reserved_names) {
-  if (std::find(reserved_names.begin(), reserved_names.end(), property_name) !=
-          reserved_names.end()) {
-    ADD_FAILURE() << "Reserved key used in RecordProperty(): " << property_name
-                  << " (" << FormatWordList(reserved_names)
-                  << " are reserved by " << GTEST_NAME_ << ")";
-    return false;
-  }
-  return true;
-}
-
-// Adds a failure if the key is a reserved attribute of the element named
-// xml_element.  Returns true if the property is valid.
-bool TestResult::ValidateTestProperty(const std::string& xml_element,
-                                      const TestProperty& test_property) {
-  return ValidateTestPropertyName(test_property.key(),
-                                  GetReservedAttributesForElement(xml_element));
-}
-
-// Clears the object.
-void TestResult::Clear() {
-  test_part_results_.clear();
-  test_properties_.clear();
-  death_test_count_ = 0;
-  elapsed_time_ = 0;
-}
-
-// Returns true off the test part was skipped.
-static bool TestPartSkipped(const TestPartResult& result) {
-  return result.skipped();
-}
-
-// Returns true if and only if the test was skipped.
-bool TestResult::Skipped() const {
-  return !Failed() && CountIf(test_part_results_, TestPartSkipped) > 0;
-}
-
-// Returns true if and only if the test failed.
-bool TestResult::Failed() const {
-  for (int i = 0; i < total_part_count(); ++i) {
-    if (GetTestPartResult(i).failed())
-      return true;
-  }
-  return false;
-}
-
-// Returns true if and only if the test part fatally failed.
-static bool TestPartFatallyFailed(const TestPartResult& result) {
-  return result.fatally_failed();
-}
-
-// Returns true if and only if the test fatally failed.
-bool TestResult::HasFatalFailure() const {
-  return CountIf(test_part_results_, TestPartFatallyFailed) > 0;
-}
-
-// Returns true if and only if the test part non-fatally failed.
-static bool TestPartNonfatallyFailed(const TestPartResult& result) {
-  return result.nonfatally_failed();
-}
-
-// Returns true if and only if the test has a non-fatal failure.
-bool TestResult::HasNonfatalFailure() const {
-  return CountIf(test_part_results_, TestPartNonfatallyFailed) > 0;
-}
-
-// Gets the number of all test parts.  This is the sum of the number
-// of successful test parts and the number of failed test parts.
-int TestResult::total_part_count() const {
-  return static_cast<int>(test_part_results_.size());
-}
-
-// Returns the number of the test properties.
-int TestResult::test_property_count() const {
-  return static_cast<int>(test_properties_.size());
-}
-
-// class Test
-
-// Creates a Test object.
-
-// The c'tor saves the states of all flags.
-Test::Test()
-    : gtest_flag_saver_(new GTEST_FLAG_SAVER_) {
-}
-
-// The d'tor restores the states of all flags.  The actual work is
-// done by the d'tor of the gtest_flag_saver_ field, and thus not
-// visible here.
-Test::~Test() {
-}
-
-// Sets up the test fixture.
-//
-// A sub-class may override this.
-void Test::SetUp() {
-}
-
-// Tears down the test fixture.
-//
-// A sub-class may override this.
-void Test::TearDown() {
-}
-
-// Allows user supplied key value pairs to be recorded for later output.
-void Test::RecordProperty(const std::string& key, const std::string& value) {
-  UnitTest::GetInstance()->RecordProperty(key, value);
-}
-
-// Allows user supplied key value pairs to be recorded for later output.
-void Test::RecordProperty(const std::string& key, int value) {
-  Message value_message;
-  value_message << value;
-  RecordProperty(key, value_message.GetString().c_str());
-}
-
-namespace internal {
-
-void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
-                                    const std::string& message) {
-  // This function is a friend of UnitTest and as such has access to
-  // AddTestPartResult.
-  UnitTest::GetInstance()->AddTestPartResult(
-      result_type,
-      nullptr,  // No info about the source file where the exception occurred.
-      -1,       // We have no info on which line caused the exception.
-      message,
-      "");  // No stack trace, either.
-}
-
-}  // namespace internal
-
-// Google Test requires all tests in the same test suite to use the same test
-// fixture class.  This function checks if the current test has the
-// same fixture class as the first test in the current test suite.  If
-// yes, it returns true; otherwise it generates a Google Test failure and
-// returns false.
-bool Test::HasSameFixtureClass() {
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  const TestSuite* const test_suite = impl->current_test_suite();
-
-  // Info about the first test in the current test suite.
-  const TestInfo* const first_test_info = test_suite->test_info_list()[0];
-  const internal::TypeId first_fixture_id = first_test_info->fixture_class_id_;
-  const char* const first_test_name = first_test_info->name();
-
-  // Info about the current test.
-  const TestInfo* const this_test_info = impl->current_test_info();
-  const internal::TypeId this_fixture_id = this_test_info->fixture_class_id_;
-  const char* const this_test_name = this_test_info->name();
-
-  if (this_fixture_id != first_fixture_id) {
-    // Is the first test defined using TEST?
-    const bool first_is_TEST = first_fixture_id == internal::GetTestTypeId();
-    // Is this test defined using TEST?
-    const bool this_is_TEST = this_fixture_id == internal::GetTestTypeId();
-
-    if (first_is_TEST || this_is_TEST) {
-      // Both TEST and TEST_F appear in same test suite, which is incorrect.
-      // Tell the user how to fix this.
-
-      // Gets the name of the TEST and the name of the TEST_F.  Note
-      // that first_is_TEST and this_is_TEST cannot both be true, as
-      // the fixture IDs are different for the two tests.
-      const char* const TEST_name =
-          first_is_TEST ? first_test_name : this_test_name;
-      const char* const TEST_F_name =
-          first_is_TEST ? this_test_name : first_test_name;
-
-      ADD_FAILURE()
-          << "All tests in the same test suite must use the same test fixture\n"
-          << "class, so mixing TEST_F and TEST in the same test suite is\n"
-          << "illegal.  In test suite " << this_test_info->test_suite_name()
-          << ",\n"
-          << "test " << TEST_F_name << " is defined using TEST_F but\n"
-          << "test " << TEST_name << " is defined using TEST.  You probably\n"
-          << "want to change the TEST to TEST_F or move it to another test\n"
-          << "case.";
-    } else {
-      // Two fixture classes with the same name appear in two different
-      // namespaces, which is not allowed. Tell the user how to fix this.
-      ADD_FAILURE()
-          << "All tests in the same test suite must use the same test fixture\n"
-          << "class.  However, in test suite "
-          << this_test_info->test_suite_name() << ",\n"
-          << "you defined test " << first_test_name << " and test "
-          << this_test_name << "\n"
-          << "using two different test fixture classes.  This can happen if\n"
-          << "the two classes are from different namespaces or translation\n"
-          << "units and have the same name.  You should probably rename one\n"
-          << "of the classes to put the tests into different test suites.";
-    }
-    return false;
-  }
-
-  return true;
-}
-
-#if GTEST_HAS_SEH
-
-// Adds an "exception thrown" fatal failure to the current test.  This
-// function returns its result via an output parameter pointer because VC++
-// prohibits creation of objects with destructors on stack in functions
-// using __try (see error C2712).
-static std::string* FormatSehExceptionMessage(DWORD exception_code,
-                                              const char* location) {
-  Message message;
-  message << "SEH exception with code 0x" << std::setbase(16) <<
-    exception_code << std::setbase(10) << " thrown in " << location << ".";
-
-  return new std::string(message.GetString());
-}
-
-#endif  // GTEST_HAS_SEH
-
-namespace internal {
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Adds an "exception thrown" fatal failure to the current test.
-static std::string FormatCxxExceptionMessage(const char* description,
-                                             const char* location) {
-  Message message;
-  if (description != nullptr) {
-    message << "C++ exception with description \"" << description << "\"";
-  } else {
-    message << "Unknown C++ exception";
-  }
-  message << " thrown in " << location << ".";
-
-  return message.GetString();
-}
-
-static std::string PrintTestPartResultToString(
-    const TestPartResult& test_part_result);
-
-GoogleTestFailureException::GoogleTestFailureException(
-    const TestPartResult& failure)
-    : ::std::runtime_error(PrintTestPartResultToString(failure).c_str()) {}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// We put these helper functions in the internal namespace as IBM's xlC
-// compiler rejects the code if they were declared static.
-
-// Runs the given method and handles SEH exceptions it throws, when
-// SEH is supported; returns the 0-value for type Result in case of an
-// SEH exception.  (Microsoft compilers cannot handle SEH and C++
-// exceptions in the same function.  Therefore, we provide a separate
-// wrapper function for handling SEH exceptions.)
-template <class T, typename Result>
-Result HandleSehExceptionsInMethodIfSupported(
-    T* object, Result (T::*method)(), const char* location) {
-#if GTEST_HAS_SEH
-  __try {
-    return (object->*method)();
-  } __except (internal::UnitTestOptions::GTestShouldProcessSEH(  // NOLINT
-      GetExceptionCode())) {
-    // We create the exception message on the heap because VC++ prohibits
-    // creation of objects with destructors on stack in functions using __try
-    // (see error C2712).
-    std::string* exception_message = FormatSehExceptionMessage(
-        GetExceptionCode(), location);
-    internal::ReportFailureInUnknownLocation(TestPartResult::kFatalFailure,
-                                             *exception_message);
-    delete exception_message;
-    return static_cast<Result>(0);
-  }
-#else
-  (void)location;
-  return (object->*method)();
-#endif  // GTEST_HAS_SEH
-}
-
-// Runs the given method and catches and reports C++ and/or SEH-style
-// exceptions, if they are supported; returns the 0-value for type
-// Result in case of an SEH exception.
-template <class T, typename Result>
-Result HandleExceptionsInMethodIfSupported(
-    T* object, Result (T::*method)(), const char* location) {
-  // NOTE: The user code can affect the way in which Google Test handles
-  // exceptions by setting GTEST_FLAG(catch_exceptions), but only before
-  // RUN_ALL_TESTS() starts. It is technically possible to check the flag
-  // after the exception is caught and either report or re-throw the
-  // exception based on the flag's value:
-  //
-  // try {
-  //   // Perform the test method.
-  // } catch (...) {
-  //   if (GTEST_FLAG(catch_exceptions))
-  //     // Report the exception as failure.
-  //   else
-  //     throw;  // Re-throws the original exception.
-  // }
-  //
-  // However, the purpose of this flag is to allow the program to drop into
-  // the debugger when the exception is thrown. On most platforms, once the
-  // control enters the catch block, the exception origin information is
-  // lost and the debugger will stop the program at the point of the
-  // re-throw in this function -- instead of at the point of the original
-  // throw statement in the code under test.  For this reason, we perform
-  // the check early, sacrificing the ability to affect Google Test's
-  // exception handling in the method where the exception is thrown.
-  if (internal::GetUnitTestImpl()->catch_exceptions()) {
-#if GTEST_HAS_EXCEPTIONS
-    try {
-      return HandleSehExceptionsInMethodIfSupported(object, method, location);
-    } catch (const AssertionException&) {  // NOLINT
-      // This failure was reported already.
-    } catch (const internal::GoogleTestFailureException&) {  // NOLINT
-      // This exception type can only be thrown by a failed Google
-      // Test assertion with the intention of letting another testing
-      // framework catch it.  Therefore we just re-throw it.
-      throw;
-    } catch (const std::exception& e) {  // NOLINT
-      internal::ReportFailureInUnknownLocation(
-          TestPartResult::kFatalFailure,
-          FormatCxxExceptionMessage(e.what(), location));
-    } catch (...) {  // NOLINT
-      internal::ReportFailureInUnknownLocation(
-          TestPartResult::kFatalFailure,
-          FormatCxxExceptionMessage(nullptr, location));
-    }
-    return static_cast<Result>(0);
-#else
-    return HandleSehExceptionsInMethodIfSupported(object, method, location);
-#endif  // GTEST_HAS_EXCEPTIONS
-  } else {
-    return (object->*method)();
-  }
-}
-
-}  // namespace internal
-
-// Runs the test and updates the test result.
-void Test::Run() {
-  if (!HasSameFixtureClass()) return;
-
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(this, &Test::SetUp, "SetUp()");
-  // We will run the test only if SetUp() was successful and didn't call
-  // GTEST_SKIP().
-  if (!HasFatalFailure() && !IsSkipped()) {
-    impl->os_stack_trace_getter()->UponLeavingGTest();
-    internal::HandleExceptionsInMethodIfSupported(
-        this, &Test::TestBody, "the test body");
-  }
-
-  // However, we want to clean up as much as possible.  Hence we will
-  // always call TearDown(), even if SetUp() or the test body has
-  // failed.
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(
-      this, &Test::TearDown, "TearDown()");
-}
-
-// Returns true if and only if the current test has a fatal failure.
-bool Test::HasFatalFailure() {
-  return internal::GetUnitTestImpl()->current_test_result()->HasFatalFailure();
-}
-
-// Returns true if and only if the current test has a non-fatal failure.
-bool Test::HasNonfatalFailure() {
-  return internal::GetUnitTestImpl()->current_test_result()->
-      HasNonfatalFailure();
-}
-
-// Returns true if and only if the current test was skipped.
-bool Test::IsSkipped() {
-  return internal::GetUnitTestImpl()->current_test_result()->Skipped();
-}
-
-// class TestInfo
-
-// Constructs a TestInfo object. It assumes ownership of the test factory
-// object.
-TestInfo::TestInfo(const std::string& a_test_suite_name,
-                   const std::string& a_name, const char* a_type_param,
-                   const char* a_value_param,
-                   internal::CodeLocation a_code_location,
-                   internal::TypeId fixture_class_id,
-                   internal::TestFactoryBase* factory)
-    : test_suite_name_(a_test_suite_name),
-      name_(a_name),
-      type_param_(a_type_param ? new std::string(a_type_param) : nullptr),
-      value_param_(a_value_param ? new std::string(a_value_param) : nullptr),
-      location_(a_code_location),
-      fixture_class_id_(fixture_class_id),
-      should_run_(false),
-      is_disabled_(false),
-      matches_filter_(false),
-      is_in_another_shard_(false),
-      factory_(factory),
-      result_() {}
-
-// Destructs a TestInfo object.
-TestInfo::~TestInfo() { delete factory_; }
-
-namespace internal {
-
-// Creates a new TestInfo object and registers it with Google Test;
-// returns the created object.
-//
-// Arguments:
-//
-//   test_suite_name:  name of the test suite
-//   name:             name of the test
-//   type_param:       the name of the test's type parameter, or NULL if
-//                     this is not a typed or a type-parameterized test.
-//   value_param:      text representation of the test's value parameter,
-//                     or NULL if this is not a value-parameterized test.
-//   code_location:    code location where the test is defined
-//   fixture_class_id: ID of the test fixture class
-//   set_up_tc:        pointer to the function that sets up the test suite
-//   tear_down_tc:     pointer to the function that tears down the test suite
-//   factory:          pointer to the factory that creates a test object.
-//                     The newly created TestInfo instance will assume
-//                     ownership of the factory object.
-TestInfo* MakeAndRegisterTestInfo(
-    const char* test_suite_name, const char* name, const char* type_param,
-    const char* value_param, CodeLocation code_location,
-    TypeId fixture_class_id, SetUpTestSuiteFunc set_up_tc,
-    TearDownTestSuiteFunc tear_down_tc, TestFactoryBase* factory) {
-  TestInfo* const test_info =
-      new TestInfo(test_suite_name, name, type_param, value_param,
-                   code_location, fixture_class_id, factory);
-  GetUnitTestImpl()->AddTestInfo(set_up_tc, tear_down_tc, test_info);
-  return test_info;
-}
-
-void ReportInvalidTestSuiteType(const char* test_suite_name,
-                                CodeLocation code_location) {
-  Message errors;
-  errors
-      << "Attempted redefinition of test suite " << test_suite_name << ".\n"
-      << "All tests in the same test suite must use the same test fixture\n"
-      << "class.  However, in test suite " << test_suite_name << ", you tried\n"
-      << "to define a test using a fixture class different from the one\n"
-      << "used earlier. This can happen if the two fixture classes are\n"
-      << "from different namespaces and have the same name. You should\n"
-      << "probably rename one of the classes to put the tests into different\n"
-      << "test suites.";
-
-  GTEST_LOG_(ERROR) << FormatFileLocation(code_location.file.c_str(),
-                                          code_location.line)
-                    << " " << errors.GetString();
-}
-}  // namespace internal
-
-namespace {
-
-// A predicate that checks the test name of a TestInfo against a known
-// value.
-//
-// This is used for implementation of the TestSuite class only.  We put
-// it in the anonymous namespace to prevent polluting the outer
-// namespace.
-//
-// TestNameIs is copyable.
-class TestNameIs {
- public:
-  // Constructor.
-  //
-  // TestNameIs has NO default constructor.
-  explicit TestNameIs(const char* name)
-      : name_(name) {}
-
-  // Returns true if and only if the test name of test_info matches name_.
-  bool operator()(const TestInfo * test_info) const {
-    return test_info && test_info->name() == name_;
-  }
-
- private:
-  std::string name_;
-};
-
-}  // namespace
-
-namespace internal {
-
-// This method expands all parameterized tests registered with macros TEST_P
-// and INSTANTIATE_TEST_SUITE_P into regular tests and registers those.
-// This will be done just once during the program runtime.
-void UnitTestImpl::RegisterParameterizedTests() {
-  if (!parameterized_tests_registered_) {
-    parameterized_test_registry_.RegisterTests();
-    type_parameterized_test_registry_.CheckForInstantiations();
-    parameterized_tests_registered_ = true;
-  }
-}
-
-}  // namespace internal
-
-// Creates the test object, runs it, records its result, and then
-// deletes it.
-void TestInfo::Run() {
-  if (!should_run_) return;
-
-  // Tells UnitTest where to store test result.
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->set_current_test_info(this);
-
-  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
-
-  // Notifies the unit test event listeners that a test is about to start.
-  repeater->OnTestStart(*this);
-
-  result_.set_start_timestamp(internal::GetTimeInMillis());
-  internal::Timer timer;
-
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-
-  // Creates the test object.
-  Test* const test = internal::HandleExceptionsInMethodIfSupported(
-      factory_, &internal::TestFactoryBase::CreateTest,
-      "the test fixture's constructor");
-
-  // Runs the test if the constructor didn't generate a fatal failure or invoke
-  // GTEST_SKIP().
-  // Note that the object will not be null
-  if (!Test::HasFatalFailure() && !Test::IsSkipped()) {
-    // This doesn't throw as all user code that can throw are wrapped into
-    // exception handling code.
-    test->Run();
-  }
-
-  if (test != nullptr) {
-    // Deletes the test object.
-    impl->os_stack_trace_getter()->UponLeavingGTest();
-    internal::HandleExceptionsInMethodIfSupported(
-        test, &Test::DeleteSelf_, "the test fixture's destructor");
-  }
-
-  result_.set_elapsed_time(timer.Elapsed());
-
-  // Notifies the unit test event listener that a test has just finished.
-  repeater->OnTestEnd(*this);
-
-  // Tells UnitTest to stop associating assertion results to this
-  // test.
-  impl->set_current_test_info(nullptr);
-}
-
-// Skip and records a skipped test result for this object.
-void TestInfo::Skip() {
-  if (!should_run_) return;
-
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->set_current_test_info(this);
-
-  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
-
-  // Notifies the unit test event listeners that a test is about to start.
-  repeater->OnTestStart(*this);
-
-  const TestPartResult test_part_result =
-      TestPartResult(TestPartResult::kSkip, this->file(), this->line(), "");
-  impl->GetTestPartResultReporterForCurrentThread()->ReportTestPartResult(
-      test_part_result);
-
-  // Notifies the unit test event listener that a test has just finished.
-  repeater->OnTestEnd(*this);
-  impl->set_current_test_info(nullptr);
-}
-
-// class TestSuite
-
-// Gets the number of successful tests in this test suite.
-int TestSuite::successful_test_count() const {
-  return CountIf(test_info_list_, TestPassed);
-}
-
-// Gets the number of successful tests in this test suite.
-int TestSuite::skipped_test_count() const {
-  return CountIf(test_info_list_, TestSkipped);
-}
-
-// Gets the number of failed tests in this test suite.
-int TestSuite::failed_test_count() const {
-  return CountIf(test_info_list_, TestFailed);
-}
-
-// Gets the number of disabled tests that will be reported in the XML report.
-int TestSuite::reportable_disabled_test_count() const {
-  return CountIf(test_info_list_, TestReportableDisabled);
-}
-
-// Gets the number of disabled tests in this test suite.
-int TestSuite::disabled_test_count() const {
-  return CountIf(test_info_list_, TestDisabled);
-}
-
-// Gets the number of tests to be printed in the XML report.
-int TestSuite::reportable_test_count() const {
-  return CountIf(test_info_list_, TestReportable);
-}
-
-// Get the number of tests in this test suite that should run.
-int TestSuite::test_to_run_count() const {
-  return CountIf(test_info_list_, ShouldRunTest);
-}
-
-// Gets the number of all tests.
-int TestSuite::total_test_count() const {
-  return static_cast<int>(test_info_list_.size());
-}
-
-// Creates a TestSuite with the given name.
-//
-// Arguments:
-//
-//   a_name:       name of the test suite
-//   a_type_param: the name of the test suite's type parameter, or NULL if
-//                 this is not a typed or a type-parameterized test suite.
-//   set_up_tc:    pointer to the function that sets up the test suite
-//   tear_down_tc: pointer to the function that tears down the test suite
-TestSuite::TestSuite(const char* a_name, const char* a_type_param,
-                     internal::SetUpTestSuiteFunc set_up_tc,
-                     internal::TearDownTestSuiteFunc tear_down_tc)
-    : name_(a_name),
-      type_param_(a_type_param ? new std::string(a_type_param) : nullptr),
-      set_up_tc_(set_up_tc),
-      tear_down_tc_(tear_down_tc),
-      should_run_(false),
-      start_timestamp_(0),
-      elapsed_time_(0) {}
-
-// Destructor of TestSuite.
-TestSuite::~TestSuite() {
-  // Deletes every Test in the collection.
-  ForEach(test_info_list_, internal::Delete<TestInfo>);
-}
-
-// Returns the i-th test among all the tests. i can range from 0 to
-// total_test_count() - 1. If i is not in that range, returns NULL.
-const TestInfo* TestSuite::GetTestInfo(int i) const {
-  const int index = GetElementOr(test_indices_, i, -1);
-  return index < 0 ? nullptr : test_info_list_[static_cast<size_t>(index)];
-}
-
-// Returns the i-th test among all the tests. i can range from 0 to
-// total_test_count() - 1. If i is not in that range, returns NULL.
-TestInfo* TestSuite::GetMutableTestInfo(int i) {
-  const int index = GetElementOr(test_indices_, i, -1);
-  return index < 0 ? nullptr : test_info_list_[static_cast<size_t>(index)];
-}
-
-// Adds a test to this test suite.  Will delete the test upon
-// destruction of the TestSuite object.
-void TestSuite::AddTestInfo(TestInfo* test_info) {
-  test_info_list_.push_back(test_info);
-  test_indices_.push_back(static_cast<int>(test_indices_.size()));
-}
-
-// Runs every test in this TestSuite.
-void TestSuite::Run() {
-  if (!should_run_) return;
-
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->set_current_test_suite(this);
-
-  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
-
-  // Call both legacy and the new API
-  repeater->OnTestSuiteStart(*this);
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  repeater->OnTestCaseStart(*this);
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(
-      this, &TestSuite::RunSetUpTestSuite, "SetUpTestSuite()");
-
-  start_timestamp_ = internal::GetTimeInMillis();
-  internal::Timer timer;
-  for (int i = 0; i < total_test_count(); i++) {
-    GetMutableTestInfo(i)->Run();
-    if (GTEST_FLAG(fail_fast) && GetMutableTestInfo(i)->result()->Failed()) {
-      for (int j = i + 1; j < total_test_count(); j++) {
-        GetMutableTestInfo(j)->Skip();
-      }
-      break;
-    }
-  }
-  elapsed_time_ = timer.Elapsed();
-
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(
-      this, &TestSuite::RunTearDownTestSuite, "TearDownTestSuite()");
-
-  // Call both legacy and the new API
-  repeater->OnTestSuiteEnd(*this);
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  repeater->OnTestCaseEnd(*this);
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  impl->set_current_test_suite(nullptr);
-}
-
-// Skips all tests under this TestSuite.
-void TestSuite::Skip() {
-  if (!should_run_) return;
-
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->set_current_test_suite(this);
-
-  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
-
-  // Call both legacy and the new API
-  repeater->OnTestSuiteStart(*this);
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  repeater->OnTestCaseStart(*this);
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  for (int i = 0; i < total_test_count(); i++) {
-    GetMutableTestInfo(i)->Skip();
-  }
-
-  // Call both legacy and the new API
-  repeater->OnTestSuiteEnd(*this);
-  // Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  repeater->OnTestCaseEnd(*this);
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  impl->set_current_test_suite(nullptr);
-}
-
-// Clears the results of all tests in this test suite.
-void TestSuite::ClearResult() {
-  ad_hoc_test_result_.Clear();
-  ForEach(test_info_list_, TestInfo::ClearTestResult);
-}
-
-// Shuffles the tests in this test suite.
-void TestSuite::ShuffleTests(internal::Random* random) {
-  Shuffle(random, &test_indices_);
-}
-
-// Restores the test order to before the first shuffle.
-void TestSuite::UnshuffleTests() {
-  for (size_t i = 0; i < test_indices_.size(); i++) {
-    test_indices_[i] = static_cast<int>(i);
-  }
-}
-
-// Formats a countable noun.  Depending on its quantity, either the
-// singular form or the plural form is used. e.g.
-//
-// FormatCountableNoun(1, "formula", "formuli") returns "1 formula".
-// FormatCountableNoun(5, "book", "books") returns "5 books".
-static std::string FormatCountableNoun(int count,
-                                       const char * singular_form,
-                                       const char * plural_form) {
-  return internal::StreamableToString(count) + " " +
-      (count == 1 ? singular_form : plural_form);
-}
-
-// Formats the count of tests.
-static std::string FormatTestCount(int test_count) {
-  return FormatCountableNoun(test_count, "test", "tests");
-}
-
-// Formats the count of test suites.
-static std::string FormatTestSuiteCount(int test_suite_count) {
-  return FormatCountableNoun(test_suite_count, "test suite", "test suites");
-}
-
-// Converts a TestPartResult::Type enum to human-friendly string
-// representation.  Both kNonFatalFailure and kFatalFailure are translated
-// to "Failure", as the user usually doesn't care about the difference
-// between the two when viewing the test result.
-static const char * TestPartResultTypeToString(TestPartResult::Type type) {
-  switch (type) {
-    case TestPartResult::kSkip:
-      return "Skipped\n";
-    case TestPartResult::kSuccess:
-      return "Success";
-
-    case TestPartResult::kNonFatalFailure:
-    case TestPartResult::kFatalFailure:
-#ifdef _MSC_VER
-      return "error: ";
-#else
-      return "Failure\n";
-#endif
-    default:
-      return "Unknown result type";
-  }
-}
-
-namespace internal {
-namespace {
-enum class GTestColor { kDefault, kRed, kGreen, kYellow };
-}  // namespace
-
-// Prints a TestPartResult to an std::string.
-static std::string PrintTestPartResultToString(
-    const TestPartResult& test_part_result) {
-  return (Message()
-          << internal::FormatFileLocation(test_part_result.file_name(),
-                                          test_part_result.line_number())
-          << " " << TestPartResultTypeToString(test_part_result.type())
-          << test_part_result.message()).GetString();
-}
-
-// Prints a TestPartResult.
-static void PrintTestPartResult(const TestPartResult& test_part_result) {
-  const std::string& result =
-      PrintTestPartResultToString(test_part_result);
-  printf("%s\n", result.c_str());
-  fflush(stdout);
-  // If the test program runs in Visual Studio or a debugger, the
-  // following statements add the test part result message to the Output
-  // window such that the user can double-click on it to jump to the
-  // corresponding source code location; otherwise they do nothing.
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
-  // We don't call OutputDebugString*() on Windows Mobile, as printing
-  // to stdout is done by OutputDebugString() there already - we don't
-  // want the same message printed twice.
-  ::OutputDebugStringA(result.c_str());
-  ::OutputDebugStringA("\n");
-#endif
-}
-
-// class PrettyUnitTestResultPrinter
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
-    !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT && !GTEST_OS_WINDOWS_MINGW
-
-// Returns the character attribute for the given color.
-static WORD GetColorAttribute(GTestColor color) {
-  switch (color) {
-    case GTestColor::kRed:
-      return FOREGROUND_RED;
-    case GTestColor::kGreen:
-      return FOREGROUND_GREEN;
-    case GTestColor::kYellow:
-      return FOREGROUND_RED | FOREGROUND_GREEN;
-    default:           return 0;
-  }
-}
-
-static int GetBitOffset(WORD color_mask) {
-  if (color_mask == 0) return 0;
-
-  int bitOffset = 0;
-  while ((color_mask & 1) == 0) {
-    color_mask >>= 1;
-    ++bitOffset;
-  }
-  return bitOffset;
-}
-
-static WORD GetNewColor(GTestColor color, WORD old_color_attrs) {
-  // Let's reuse the BG
-  static const WORD background_mask = BACKGROUND_BLUE | BACKGROUND_GREEN |
-                                      BACKGROUND_RED | BACKGROUND_INTENSITY;
-  static const WORD foreground_mask = FOREGROUND_BLUE | FOREGROUND_GREEN |
-                                      FOREGROUND_RED | FOREGROUND_INTENSITY;
-  const WORD existing_bg = old_color_attrs & background_mask;
-
-  WORD new_color =
-      GetColorAttribute(color) | existing_bg | FOREGROUND_INTENSITY;
-  static const int bg_bitOffset = GetBitOffset(background_mask);
-  static const int fg_bitOffset = GetBitOffset(foreground_mask);
-
-  if (((new_color & background_mask) >> bg_bitOffset) ==
-      ((new_color & foreground_mask) >> fg_bitOffset)) {
-    new_color ^= FOREGROUND_INTENSITY;  // invert intensity
-  }
-  return new_color;
-}
-
-#else
-
-// Returns the ANSI color code for the given color. GTestColor::kDefault is
-// an invalid input.
-static const char* GetAnsiColorCode(GTestColor color) {
-  switch (color) {
-    case GTestColor::kRed:
-      return "1";
-    case GTestColor::kGreen:
-      return "2";
-    case GTestColor::kYellow:
-      return "3";
-    default:
-      return nullptr;
-  }
-}
-
-#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
-
-// Returns true if and only if Google Test should use colors in the output.
-bool ShouldUseColor(bool stdout_is_tty) {
-  const char* const gtest_color = GTEST_FLAG(color).c_str();
-
-  if (String::CaseInsensitiveCStringEquals(gtest_color, "auto")) {
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
-    // On Windows the TERM variable is usually not set, but the
-    // console there does support colors.
-    return stdout_is_tty;
-#else
-    // On non-Windows platforms, we rely on the TERM variable.
-    const char* const term = posix::GetEnv("TERM");
-    const bool term_supports_color =
-        String::CStringEquals(term, "xterm") ||
-        String::CStringEquals(term, "xterm-color") ||
-        String::CStringEquals(term, "xterm-256color") ||
-        String::CStringEquals(term, "screen") ||
-        String::CStringEquals(term, "screen-256color") ||
-        String::CStringEquals(term, "tmux") ||
-        String::CStringEquals(term, "tmux-256color") ||
-        String::CStringEquals(term, "rxvt-unicode") ||
-        String::CStringEquals(term, "rxvt-unicode-256color") ||
-        String::CStringEquals(term, "linux") ||
-        String::CStringEquals(term, "cygwin");
-    return stdout_is_tty && term_supports_color;
-#endif  // GTEST_OS_WINDOWS
-  }
-
-  return String::CaseInsensitiveCStringEquals(gtest_color, "yes") ||
-      String::CaseInsensitiveCStringEquals(gtest_color, "true") ||
-      String::CaseInsensitiveCStringEquals(gtest_color, "t") ||
-      String::CStringEquals(gtest_color, "1");
-  // We take "yes", "true", "t", and "1" as meaning "yes".  If the
-  // value is neither one of these nor "auto", we treat it as "no" to
-  // be conservative.
-}
-
-// Helpers for printing colored strings to stdout. Note that on Windows, we
-// cannot simply emit special characters and have the terminal change colors.
-// This routine must actually emit the characters rather than return a string
-// that would be colored when printed, as can be done on Linux.
-
-GTEST_ATTRIBUTE_PRINTF_(2, 3)
-static void ColoredPrintf(GTestColor color, const char *fmt, ...) {
-  va_list args;
-  va_start(args, fmt);
-
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_ZOS || GTEST_OS_IOS || \
-    GTEST_OS_WINDOWS_PHONE || GTEST_OS_WINDOWS_RT || defined(ESP_PLATFORM)
-  const bool use_color = AlwaysFalse();
-#else
-  static const bool in_color_mode =
-      ShouldUseColor(posix::IsATTY(posix::FileNo(stdout)) != 0);
-  const bool use_color = in_color_mode && (color != GTestColor::kDefault);
-#endif  // GTEST_OS_WINDOWS_MOBILE || GTEST_OS_ZOS
-
-  if (!use_color) {
-    vprintf(fmt, args);
-    va_end(args);
-    return;
-  }
-
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
-    !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT && !GTEST_OS_WINDOWS_MINGW
-  const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
-
-  // Gets the current text color.
-  CONSOLE_SCREEN_BUFFER_INFO buffer_info;
-  GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
-  const WORD old_color_attrs = buffer_info.wAttributes;
-  const WORD new_color = GetNewColor(color, old_color_attrs);
-
-  // We need to flush the stream buffers into the console before each
-  // SetConsoleTextAttribute call lest it affect the text that is already
-  // printed but has not yet reached the console.
-  fflush(stdout);
-  SetConsoleTextAttribute(stdout_handle, new_color);
-
-  vprintf(fmt, args);
-
-  fflush(stdout);
-  // Restores the text color.
-  SetConsoleTextAttribute(stdout_handle, old_color_attrs);
-#else
-  printf("\033[0;3%sm", GetAnsiColorCode(color));
-  vprintf(fmt, args);
-  printf("\033[m");  // Resets the terminal to default.
-#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
-  va_end(args);
-}
-
-// Text printed in Google Test's text output and --gtest_list_tests
-// output to label the type parameter and value parameter for a test.
-static const char kTypeParamLabel[] = "TypeParam";
-static const char kValueParamLabel[] = "GetParam()";
-
-static void PrintFullTestCommentIfPresent(const TestInfo& test_info) {
-  const char* const type_param = test_info.type_param();
-  const char* const value_param = test_info.value_param();
-
-  if (type_param != nullptr || value_param != nullptr) {
-    printf(", where ");
-    if (type_param != nullptr) {
-      printf("%s = %s", kTypeParamLabel, type_param);
-      if (value_param != nullptr) printf(" and ");
-    }
-    if (value_param != nullptr) {
-      printf("%s = %s", kValueParamLabel, value_param);
-    }
-  }
-}
-
-// This class implements the TestEventListener interface.
-//
-// Class PrettyUnitTestResultPrinter is copyable.
-class PrettyUnitTestResultPrinter : public TestEventListener {
- public:
-  PrettyUnitTestResultPrinter() {}
-  static void PrintTestName(const char* test_suite, const char* test) {
-    printf("%s.%s", test_suite, test);
-  }
-
-  // The following methods override what's in the TestEventListener class.
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationStart(const UnitTest& unit_test, int iteration) override;
-  void OnEnvironmentsSetUpStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestCase& test_case) override;
-#else
-  void OnTestSuiteStart(const TestSuite& test_suite) override;
-#endif  // OnTestCaseStart
-
-  void OnTestStart(const TestInfo& test_info) override;
-
-  void OnTestPartResult(const TestPartResult& result) override;
-  void OnTestEnd(const TestInfo& test_info) override;
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& test_case) override;
-#else
-  void OnTestSuiteEnd(const TestSuite& test_suite) override;
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnEnvironmentsTearDownStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
-
- private:
-  static void PrintFailedTests(const UnitTest& unit_test);
-  static void PrintFailedTestSuites(const UnitTest& unit_test);
-  static void PrintSkippedTests(const UnitTest& unit_test);
-};
-
-  // Fired before each iteration of tests starts.
-void PrettyUnitTestResultPrinter::OnTestIterationStart(
-    const UnitTest& unit_test, int iteration) {
-  if (GTEST_FLAG(repeat) != 1)
-    printf("\nRepeating all tests (iteration %d) . . .\n\n", iteration + 1);
-
-  const char* const filter = GTEST_FLAG(filter).c_str();
-
-  // Prints the filter if it's not *.  This reminds the user that some
-  // tests may be skipped.
-  if (!String::CStringEquals(filter, kUniversalFilter)) {
-    ColoredPrintf(GTestColor::kYellow, "Note: %s filter = %s\n", GTEST_NAME_,
-                  filter);
-  }
-
-  if (internal::ShouldShard(kTestTotalShards, kTestShardIndex, false)) {
-    const int32_t shard_index = Int32FromEnvOrDie(kTestShardIndex, -1);
-    ColoredPrintf(GTestColor::kYellow, "Note: This is test shard %d of %s.\n",
-                  static_cast<int>(shard_index) + 1,
-                  internal::posix::GetEnv(kTestTotalShards));
-  }
-
-  if (GTEST_FLAG(shuffle)) {
-    ColoredPrintf(GTestColor::kYellow,
-                  "Note: Randomizing tests' orders with a seed of %d .\n",
-                  unit_test.random_seed());
-  }
-
-  ColoredPrintf(GTestColor::kGreen, "[==========] ");
-  printf("Running %s from %s.\n",
-         FormatTestCount(unit_test.test_to_run_count()).c_str(),
-         FormatTestSuiteCount(unit_test.test_suite_to_run_count()).c_str());
-  fflush(stdout);
-}
-
-void PrettyUnitTestResultPrinter::OnEnvironmentsSetUpStart(
-    const UnitTest& /*unit_test*/) {
-  ColoredPrintf(GTestColor::kGreen, "[----------] ");
-  printf("Global test environment set-up.\n");
-  fflush(stdout);
-}
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-void PrettyUnitTestResultPrinter::OnTestCaseStart(const TestCase& test_case) {
-  const std::string counts =
-      FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
-  ColoredPrintf(GTestColor::kGreen, "[----------] ");
-  printf("%s from %s", counts.c_str(), test_case.name());
-  if (test_case.type_param() == nullptr) {
-    printf("\n");
-  } else {
-    printf(", where %s = %s\n", kTypeParamLabel, test_case.type_param());
-  }
-  fflush(stdout);
-}
-#else
-void PrettyUnitTestResultPrinter::OnTestSuiteStart(
-    const TestSuite& test_suite) {
-  const std::string counts =
-      FormatCountableNoun(test_suite.test_to_run_count(), "test", "tests");
-  ColoredPrintf(GTestColor::kGreen, "[----------] ");
-  printf("%s from %s", counts.c_str(), test_suite.name());
-  if (test_suite.type_param() == nullptr) {
-    printf("\n");
-  } else {
-    printf(", where %s = %s\n", kTypeParamLabel, test_suite.type_param());
-  }
-  fflush(stdout);
-}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-void PrettyUnitTestResultPrinter::OnTestStart(const TestInfo& test_info) {
-  ColoredPrintf(GTestColor::kGreen, "[ RUN      ] ");
-  PrintTestName(test_info.test_suite_name(), test_info.name());
-  printf("\n");
-  fflush(stdout);
-}
-
-// Called after an assertion failure.
-void PrettyUnitTestResultPrinter::OnTestPartResult(
-    const TestPartResult& result) {
-  switch (result.type()) {
-    // If the test part succeeded, we don't need to do anything.
-    case TestPartResult::kSuccess:
-      return;
-    default:
-      // Print failure message from the assertion
-      // (e.g. expected this and got that).
-      PrintTestPartResult(result);
-      fflush(stdout);
-  }
-}
-
-void PrettyUnitTestResultPrinter::OnTestEnd(const TestInfo& test_info) {
-  if (test_info.result()->Passed()) {
-    ColoredPrintf(GTestColor::kGreen, "[       OK ] ");
-  } else if (test_info.result()->Skipped()) {
-    ColoredPrintf(GTestColor::kGreen, "[  SKIPPED ] ");
-  } else {
-    ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
-  }
-  PrintTestName(test_info.test_suite_name(), test_info.name());
-  if (test_info.result()->Failed())
-    PrintFullTestCommentIfPresent(test_info);
-
-  if (GTEST_FLAG(print_time)) {
-    printf(" (%s ms)\n", internal::StreamableToString(
-           test_info.result()->elapsed_time()).c_str());
-  } else {
-    printf("\n");
-  }
-  fflush(stdout);
-}
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-void PrettyUnitTestResultPrinter::OnTestCaseEnd(const TestCase& test_case) {
-  if (!GTEST_FLAG(print_time)) return;
-
-  const std::string counts =
-      FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
-  ColoredPrintf(GTestColor::kGreen, "[----------] ");
-  printf("%s from %s (%s ms total)\n\n", counts.c_str(), test_case.name(),
-         internal::StreamableToString(test_case.elapsed_time()).c_str());
-  fflush(stdout);
-}
-#else
-void PrettyUnitTestResultPrinter::OnTestSuiteEnd(const TestSuite& test_suite) {
-  if (!GTEST_FLAG(print_time)) return;
-
-  const std::string counts =
-      FormatCountableNoun(test_suite.test_to_run_count(), "test", "tests");
-  ColoredPrintf(GTestColor::kGreen, "[----------] ");
-  printf("%s from %s (%s ms total)\n\n", counts.c_str(), test_suite.name(),
-         internal::StreamableToString(test_suite.elapsed_time()).c_str());
-  fflush(stdout);
-}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-void PrettyUnitTestResultPrinter::OnEnvironmentsTearDownStart(
-    const UnitTest& /*unit_test*/) {
-  ColoredPrintf(GTestColor::kGreen, "[----------] ");
-  printf("Global test environment tear-down\n");
-  fflush(stdout);
-}
-
-// Internal helper for printing the list of failed tests.
-void PrettyUnitTestResultPrinter::PrintFailedTests(const UnitTest& unit_test) {
-  const int failed_test_count = unit_test.failed_test_count();
-  ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
-  printf("%s, listed below:\n", FormatTestCount(failed_test_count).c_str());
-
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    const TestSuite& test_suite = *unit_test.GetTestSuite(i);
-    if (!test_suite.should_run() || (test_suite.failed_test_count() == 0)) {
-      continue;
-    }
-    for (int j = 0; j < test_suite.total_test_count(); ++j) {
-      const TestInfo& test_info = *test_suite.GetTestInfo(j);
-      if (!test_info.should_run() || !test_info.result()->Failed()) {
-        continue;
-      }
-      ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
-      printf("%s.%s", test_suite.name(), test_info.name());
-      PrintFullTestCommentIfPresent(test_info);
-      printf("\n");
-    }
-  }
-  printf("\n%2d FAILED %s\n", failed_test_count,
-         failed_test_count == 1 ? "TEST" : "TESTS");
-}
-
-// Internal helper for printing the list of test suite failures not covered by
-// PrintFailedTests.
-void PrettyUnitTestResultPrinter::PrintFailedTestSuites(
-    const UnitTest& unit_test) {
-  int suite_failure_count = 0;
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    const TestSuite& test_suite = *unit_test.GetTestSuite(i);
-    if (!test_suite.should_run()) {
-      continue;
-    }
-    if (test_suite.ad_hoc_test_result().Failed()) {
-      ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
-      printf("%s: SetUpTestSuite or TearDownTestSuite\n", test_suite.name());
-      ++suite_failure_count;
-    }
-  }
-  if (suite_failure_count > 0) {
-    printf("\n%2d FAILED TEST %s\n", suite_failure_count,
-           suite_failure_count == 1 ? "SUITE" : "SUITES");
-  }
-}
-
-// Internal helper for printing the list of skipped tests.
-void PrettyUnitTestResultPrinter::PrintSkippedTests(const UnitTest& unit_test) {
-  const int skipped_test_count = unit_test.skipped_test_count();
-  if (skipped_test_count == 0) {
-    return;
-  }
-
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    const TestSuite& test_suite = *unit_test.GetTestSuite(i);
-    if (!test_suite.should_run() || (test_suite.skipped_test_count() == 0)) {
-      continue;
-    }
-    for (int j = 0; j < test_suite.total_test_count(); ++j) {
-      const TestInfo& test_info = *test_suite.GetTestInfo(j);
-      if (!test_info.should_run() || !test_info.result()->Skipped()) {
-        continue;
-      }
-      ColoredPrintf(GTestColor::kGreen, "[  SKIPPED ] ");
-      printf("%s.%s", test_suite.name(), test_info.name());
-      printf("\n");
-    }
-  }
-}
-
-void PrettyUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                     int /*iteration*/) {
-  ColoredPrintf(GTestColor::kGreen, "[==========] ");
-  printf("%s from %s ran.",
-         FormatTestCount(unit_test.test_to_run_count()).c_str(),
-         FormatTestSuiteCount(unit_test.test_suite_to_run_count()).c_str());
-  if (GTEST_FLAG(print_time)) {
-    printf(" (%s ms total)",
-           internal::StreamableToString(unit_test.elapsed_time()).c_str());
-  }
-  printf("\n");
-  ColoredPrintf(GTestColor::kGreen, "[  PASSED  ] ");
-  printf("%s.\n", FormatTestCount(unit_test.successful_test_count()).c_str());
-
-  const int skipped_test_count = unit_test.skipped_test_count();
-  if (skipped_test_count > 0) {
-    ColoredPrintf(GTestColor::kGreen, "[  SKIPPED ] ");
-    printf("%s, listed below:\n", FormatTestCount(skipped_test_count).c_str());
-    PrintSkippedTests(unit_test);
-  }
-
-  if (!unit_test.Passed()) {
-    PrintFailedTests(unit_test);
-    PrintFailedTestSuites(unit_test);
-  }
-
-  int num_disabled = unit_test.reportable_disabled_test_count();
-  if (num_disabled && !GTEST_FLAG(also_run_disabled_tests)) {
-    if (unit_test.Passed()) {
-      printf("\n");  // Add a spacer if no FAILURE banner is displayed.
-    }
-    ColoredPrintf(GTestColor::kYellow, "  YOU HAVE %d DISABLED %s\n\n",
-                  num_disabled, num_disabled == 1 ? "TEST" : "TESTS");
-  }
-  // Ensure that Google Test output is printed before, e.g., heapchecker output.
-  fflush(stdout);
-}
-
-// End PrettyUnitTestResultPrinter
-
-// This class implements the TestEventListener interface.
-//
-// Class BriefUnitTestResultPrinter is copyable.
-class BriefUnitTestResultPrinter : public TestEventListener {
- public:
-  BriefUnitTestResultPrinter() {}
-  static void PrintTestName(const char* test_suite, const char* test) {
-    printf("%s.%s", test_suite, test);
-  }
-
-  // The following methods override what's in the TestEventListener class.
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int /*iteration*/) override {}
-  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {}
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestCase& /*test_case*/) override {}
-#else
-  void OnTestSuiteStart(const TestSuite& /*test_suite*/) override {}
-#endif  // OnTestCaseStart
-
-  void OnTestStart(const TestInfo& /*test_info*/) override {}
-
-  void OnTestPartResult(const TestPartResult& result) override;
-  void OnTestEnd(const TestInfo& test_info) override;
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& /*test_case*/) override {}
-#else
-  void OnTestSuiteEnd(const TestSuite& /*test_suite*/) override {}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {}
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
-};
-
-// Called after an assertion failure.
-void BriefUnitTestResultPrinter::OnTestPartResult(
-    const TestPartResult& result) {
-  switch (result.type()) {
-    // If the test part succeeded, we don't need to do anything.
-    case TestPartResult::kSuccess:
-      return;
-    default:
-      // Print failure message from the assertion
-      // (e.g. expected this and got that).
-      PrintTestPartResult(result);
-      fflush(stdout);
-  }
-}
-
-void BriefUnitTestResultPrinter::OnTestEnd(const TestInfo& test_info) {
-  if (test_info.result()->Failed()) {
-    ColoredPrintf(GTestColor::kRed, "[  FAILED  ] ");
-    PrintTestName(test_info.test_suite_name(), test_info.name());
-    PrintFullTestCommentIfPresent(test_info);
-
-    if (GTEST_FLAG(print_time)) {
-      printf(" (%s ms)\n",
-             internal::StreamableToString(test_info.result()->elapsed_time())
-                 .c_str());
-    } else {
-      printf("\n");
-    }
-    fflush(stdout);
-  }
-}
-
-void BriefUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                    int /*iteration*/) {
-  ColoredPrintf(GTestColor::kGreen, "[==========] ");
-  printf("%s from %s ran.",
-         FormatTestCount(unit_test.test_to_run_count()).c_str(),
-         FormatTestSuiteCount(unit_test.test_suite_to_run_count()).c_str());
-  if (GTEST_FLAG(print_time)) {
-    printf(" (%s ms total)",
-           internal::StreamableToString(unit_test.elapsed_time()).c_str());
-  }
-  printf("\n");
-  ColoredPrintf(GTestColor::kGreen, "[  PASSED  ] ");
-  printf("%s.\n", FormatTestCount(unit_test.successful_test_count()).c_str());
-
-  const int skipped_test_count = unit_test.skipped_test_count();
-  if (skipped_test_count > 0) {
-    ColoredPrintf(GTestColor::kGreen, "[  SKIPPED ] ");
-    printf("%s.\n", FormatTestCount(skipped_test_count).c_str());
-  }
-
-  int num_disabled = unit_test.reportable_disabled_test_count();
-  if (num_disabled && !GTEST_FLAG(also_run_disabled_tests)) {
-    if (unit_test.Passed()) {
-      printf("\n");  // Add a spacer if no FAILURE banner is displayed.
-    }
-    ColoredPrintf(GTestColor::kYellow, "  YOU HAVE %d DISABLED %s\n\n",
-                  num_disabled, num_disabled == 1 ? "TEST" : "TESTS");
-  }
-  // Ensure that Google Test output is printed before, e.g., heapchecker output.
-  fflush(stdout);
-}
-
-// End BriefUnitTestResultPrinter
-
-// class TestEventRepeater
-//
-// This class forwards events to other event listeners.
-class TestEventRepeater : public TestEventListener {
- public:
-  TestEventRepeater() : forwarding_enabled_(true) {}
-  ~TestEventRepeater() override;
-  void Append(TestEventListener *listener);
-  TestEventListener* Release(TestEventListener* listener);
-
-  // Controls whether events will be forwarded to listeners_. Set to false
-  // in death test child processes.
-  bool forwarding_enabled() const { return forwarding_enabled_; }
-  void set_forwarding_enabled(bool enable) { forwarding_enabled_ = enable; }
-
-  void OnTestProgramStart(const UnitTest& unit_test) override;
-  void OnTestIterationStart(const UnitTest& unit_test, int iteration) override;
-  void OnEnvironmentsSetUpStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsSetUpEnd(const UnitTest& unit_test) override;
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestSuite& parameter) override;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestSuiteStart(const TestSuite& parameter) override;
-  void OnTestStart(const TestInfo& test_info) override;
-  void OnTestPartResult(const TestPartResult& result) override;
-  void OnTestEnd(const TestInfo& test_info) override;
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& parameter) override;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestSuiteEnd(const TestSuite& parameter) override;
-  void OnEnvironmentsTearDownStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsTearDownEnd(const UnitTest& unit_test) override;
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void OnTestProgramEnd(const UnitTest& unit_test) override;
-
- private:
-  // Controls whether events will be forwarded to listeners_. Set to false
-  // in death test child processes.
-  bool forwarding_enabled_;
-  // The list of listeners that receive events.
-  std::vector<TestEventListener*> listeners_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventRepeater);
-};
-
-TestEventRepeater::~TestEventRepeater() {
-  ForEach(listeners_, Delete<TestEventListener>);
-}
-
-void TestEventRepeater::Append(TestEventListener *listener) {
-  listeners_.push_back(listener);
-}
-
-TestEventListener* TestEventRepeater::Release(TestEventListener *listener) {
-  for (size_t i = 0; i < listeners_.size(); ++i) {
-    if (listeners_[i] == listener) {
-      listeners_.erase(listeners_.begin() + static_cast<int>(i));
-      return listener;
-    }
-  }
-
-  return nullptr;
-}
-
-// Since most methods are very similar, use macros to reduce boilerplate.
-// This defines a member that forwards the call to all listeners.
-#define GTEST_REPEATER_METHOD_(Name, Type) \
-void TestEventRepeater::Name(const Type& parameter) { \
-  if (forwarding_enabled_) { \
-    for (size_t i = 0; i < listeners_.size(); i++) { \
-      listeners_[i]->Name(parameter); \
-    } \
-  } \
-}
-// This defines a member that forwards the call to all listeners in reverse
-// order.
-#define GTEST_REVERSE_REPEATER_METHOD_(Name, Type)      \
-  void TestEventRepeater::Name(const Type& parameter) { \
-    if (forwarding_enabled_) {                          \
-      for (size_t i = listeners_.size(); i != 0; i--) { \
-        listeners_[i - 1]->Name(parameter);             \
-      }                                                 \
-    }                                                   \
-  }
-
-GTEST_REPEATER_METHOD_(OnTestProgramStart, UnitTest)
-GTEST_REPEATER_METHOD_(OnEnvironmentsSetUpStart, UnitTest)
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REPEATER_METHOD_(OnTestCaseStart, TestSuite)
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REPEATER_METHOD_(OnTestSuiteStart, TestSuite)
-GTEST_REPEATER_METHOD_(OnTestStart, TestInfo)
-GTEST_REPEATER_METHOD_(OnTestPartResult, TestPartResult)
-GTEST_REPEATER_METHOD_(OnEnvironmentsTearDownStart, UnitTest)
-GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsSetUpEnd, UnitTest)
-GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsTearDownEnd, UnitTest)
-GTEST_REVERSE_REPEATER_METHOD_(OnTestEnd, TestInfo)
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REVERSE_REPEATER_METHOD_(OnTestCaseEnd, TestSuite)
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REVERSE_REPEATER_METHOD_(OnTestSuiteEnd, TestSuite)
-GTEST_REVERSE_REPEATER_METHOD_(OnTestProgramEnd, UnitTest)
-
-#undef GTEST_REPEATER_METHOD_
-#undef GTEST_REVERSE_REPEATER_METHOD_
-
-void TestEventRepeater::OnTestIterationStart(const UnitTest& unit_test,
-                                             int iteration) {
-  if (forwarding_enabled_) {
-    for (size_t i = 0; i < listeners_.size(); i++) {
-      listeners_[i]->OnTestIterationStart(unit_test, iteration);
-    }
-  }
-}
-
-void TestEventRepeater::OnTestIterationEnd(const UnitTest& unit_test,
-                                           int iteration) {
-  if (forwarding_enabled_) {
-    for (size_t i = listeners_.size(); i > 0; i--) {
-      listeners_[i - 1]->OnTestIterationEnd(unit_test, iteration);
-    }
-  }
-}
-
-// End TestEventRepeater
-
-// This class generates an XML output file.
-class XmlUnitTestResultPrinter : public EmptyTestEventListener {
- public:
-  explicit XmlUnitTestResultPrinter(const char* output_file);
-
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void ListTestsMatchingFilter(const std::vector<TestSuite*>& test_suites);
-
-  // Prints an XML summary of all unit tests.
-  static void PrintXmlTestsList(std::ostream* stream,
-                                const std::vector<TestSuite*>& test_suites);
-
- private:
-  // Is c a whitespace character that is normalized to a space character
-  // when it appears in an XML attribute value?
-  static bool IsNormalizableWhitespace(char c) {
-    return c == 0x9 || c == 0xA || c == 0xD;
-  }
-
-  // May c appear in a well-formed XML document?
-  static bool IsValidXmlCharacter(char c) {
-    return IsNormalizableWhitespace(c) || c >= 0x20;
-  }
-
-  // Returns an XML-escaped copy of the input string str.  If
-  // is_attribute is true, the text is meant to appear as an attribute
-  // value, and normalizable whitespace is preserved by replacing it
-  // with character references.
-  static std::string EscapeXml(const std::string& str, bool is_attribute);
-
-  // Returns the given string with all characters invalid in XML removed.
-  static std::string RemoveInvalidXmlCharacters(const std::string& str);
-
-  // Convenience wrapper around EscapeXml when str is an attribute value.
-  static std::string EscapeXmlAttribute(const std::string& str) {
-    return EscapeXml(str, true);
-  }
-
-  // Convenience wrapper around EscapeXml when str is not an attribute value.
-  static std::string EscapeXmlText(const char* str) {
-    return EscapeXml(str, false);
-  }
-
-  // Verifies that the given attribute belongs to the given element and
-  // streams the attribute as XML.
-  static void OutputXmlAttribute(std::ostream* stream,
-                                 const std::string& element_name,
-                                 const std::string& name,
-                                 const std::string& value);
-
-  // Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
-  static void OutputXmlCDataSection(::std::ostream* stream, const char* data);
-
-  // Streams a test suite XML stanza containing the given test result.
-  //
-  // Requires: result.Failed()
-  static void OutputXmlTestSuiteForTestResult(::std::ostream* stream,
-                                              const TestResult& result);
-
-  // Streams an XML representation of a TestResult object.
-  static void OutputXmlTestResult(::std::ostream* stream,
-                                  const TestResult& result);
-
-  // Streams an XML representation of a TestInfo object.
-  static void OutputXmlTestInfo(::std::ostream* stream,
-                                const char* test_suite_name,
-                                const TestInfo& test_info);
-
-  // Prints an XML representation of a TestSuite object
-  static void PrintXmlTestSuite(::std::ostream* stream,
-                                const TestSuite& test_suite);
-
-  // Prints an XML summary of unit_test to output stream out.
-  static void PrintXmlUnitTest(::std::ostream* stream,
-                               const UnitTest& unit_test);
-
-  // Produces a string representing the test properties in a result as space
-  // delimited XML attributes based on the property key="value" pairs.
-  // When the std::string is not empty, it includes a space at the beginning,
-  // to delimit this attribute from prior attributes.
-  static std::string TestPropertiesAsXmlAttributes(const TestResult& result);
-
-  // Streams an XML representation of the test properties of a TestResult
-  // object.
-  static void OutputXmlTestProperties(std::ostream* stream,
-                                      const TestResult& result);
-
-  // The output file.
-  const std::string output_file_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(XmlUnitTestResultPrinter);
-};
-
-// Creates a new XmlUnitTestResultPrinter.
-XmlUnitTestResultPrinter::XmlUnitTestResultPrinter(const char* output_file)
-    : output_file_(output_file) {
-  if (output_file_.empty()) {
-    GTEST_LOG_(FATAL) << "XML output file may not be null";
-  }
-}
-
-// Called after the unit test ends.
-void XmlUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                  int /*iteration*/) {
-  FILE* xmlout = OpenFileForWriting(output_file_);
-  std::stringstream stream;
-  PrintXmlUnitTest(&stream, unit_test);
-  fprintf(xmlout, "%s", StringStreamToString(&stream).c_str());
-  fclose(xmlout);
-}
-
-void XmlUnitTestResultPrinter::ListTestsMatchingFilter(
-    const std::vector<TestSuite*>& test_suites) {
-  FILE* xmlout = OpenFileForWriting(output_file_);
-  std::stringstream stream;
-  PrintXmlTestsList(&stream, test_suites);
-  fprintf(xmlout, "%s", StringStreamToString(&stream).c_str());
-  fclose(xmlout);
-}
-
-// Returns an XML-escaped copy of the input string str.  If is_attribute
-// is true, the text is meant to appear as an attribute value, and
-// normalizable whitespace is preserved by replacing it with character
-// references.
-//
-// Invalid XML characters in str, if any, are stripped from the output.
-// It is expected that most, if not all, of the text processed by this
-// module will consist of ordinary English text.
-// If this module is ever modified to produce version 1.1 XML output,
-// most invalid characters can be retained using character references.
-std::string XmlUnitTestResultPrinter::EscapeXml(
-    const std::string& str, bool is_attribute) {
-  Message m;
-
-  for (size_t i = 0; i < str.size(); ++i) {
-    const char ch = str[i];
-    switch (ch) {
-      case '<':
-        m << "&lt;";
-        break;
-      case '>':
-        m << "&gt;";
-        break;
-      case '&':
-        m << "&amp;";
-        break;
-      case '\'':
-        if (is_attribute)
-          m << "&apos;";
-        else
-          m << '\'';
-        break;
-      case '"':
-        if (is_attribute)
-          m << "&quot;";
-        else
-          m << '"';
-        break;
-      default:
-        if (IsValidXmlCharacter(ch)) {
-          if (is_attribute && IsNormalizableWhitespace(ch))
-            m << "&#x" << String::FormatByte(static_cast<unsigned char>(ch))
-              << ";";
-          else
-            m << ch;
-        }
-        break;
-    }
-  }
-
-  return m.GetString();
-}
-
-// Returns the given string with all characters invalid in XML removed.
-// Currently invalid characters are dropped from the string. An
-// alternative is to replace them with certain characters such as . or ?.
-std::string XmlUnitTestResultPrinter::RemoveInvalidXmlCharacters(
-    const std::string& str) {
-  std::string output;
-  output.reserve(str.size());
-  for (std::string::const_iterator it = str.begin(); it != str.end(); ++it)
-    if (IsValidXmlCharacter(*it))
-      output.push_back(*it);
-
-  return output;
-}
-
-// The following routines generate an XML representation of a UnitTest
-// object.
-// GOOGLETEST_CM0009 DO NOT DELETE
-//
-// This is how Google Test concepts map to the DTD:
-//
-// <testsuites name="AllTests">        <-- corresponds to a UnitTest object
-//   <testsuite name="testcase-name">  <-- corresponds to a TestSuite object
-//     <testcase name="test-name">     <-- corresponds to a TestInfo object
-//       <failure message="...">...</failure>
-//       <failure message="...">...</failure>
-//       <failure message="...">...</failure>
-//                                     <-- individual assertion failures
-//     </testcase>
-//   </testsuite>
-// </testsuites>
-
-// Formats the given time in milliseconds as seconds.
-std::string FormatTimeInMillisAsSeconds(TimeInMillis ms) {
-  ::std::stringstream ss;
-  ss << (static_cast<double>(ms) * 1e-3);
-  return ss.str();
-}
-
-static bool PortableLocaltime(time_t seconds, struct tm* out) {
-#if defined(_MSC_VER)
-  return localtime_s(out, &seconds) == 0;
-#elif defined(__MINGW32__) || defined(__MINGW64__)
-  // MINGW <time.h> provides neither localtime_r nor localtime_s, but uses
-  // Windows' localtime(), which has a thread-local tm buffer.
-  struct tm* tm_ptr = localtime(&seconds);  // NOLINT
-  if (tm_ptr == nullptr) return false;
-  *out = *tm_ptr;
-  return true;
-#elif defined(__STDC_LIB_EXT1__)
-  // Uses localtime_s when available as localtime_r is only available from
-  // C23 standard.
-  return localtime_s(&seconds, out) != nullptr;
-#else
-  return localtime_r(&seconds, out) != nullptr;
-#endif
-}
-
-// Converts the given epoch time in milliseconds to a date string in the ISO
-// 8601 format, without the timezone information.
-std::string FormatEpochTimeInMillisAsIso8601(TimeInMillis ms) {
-  struct tm time_struct;
-  if (!PortableLocaltime(static_cast<time_t>(ms / 1000), &time_struct))
-    return "";
-  // YYYY-MM-DDThh:mm:ss.sss
-  return StreamableToString(time_struct.tm_year + 1900) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mon + 1) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mday) + "T" +
-      String::FormatIntWidth2(time_struct.tm_hour) + ":" +
-      String::FormatIntWidth2(time_struct.tm_min) + ":" +
-      String::FormatIntWidth2(time_struct.tm_sec) + "." +
-      String::FormatIntWidthN(static_cast<int>(ms % 1000), 3);
-}
-
-// Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
-void XmlUnitTestResultPrinter::OutputXmlCDataSection(::std::ostream* stream,
-                                                     const char* data) {
-  const char* segment = data;
-  *stream << "<![CDATA[";
-  for (;;) {
-    const char* const next_segment = strstr(segment, "]]>");
-    if (next_segment != nullptr) {
-      stream->write(
-          segment, static_cast<std::streamsize>(next_segment - segment));
-      *stream << "]]>]]&gt;<![CDATA[";
-      segment = next_segment + strlen("]]>");
-    } else {
-      *stream << segment;
-      break;
-    }
-  }
-  *stream << "]]>";
-}
-
-void XmlUnitTestResultPrinter::OutputXmlAttribute(
-    std::ostream* stream,
-    const std::string& element_name,
-    const std::string& name,
-    const std::string& value) {
-  const std::vector<std::string>& allowed_names =
-      GetReservedOutputAttributesForElement(element_name);
-
-  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
-                   allowed_names.end())
-      << "Attribute " << name << " is not allowed for element <" << element_name
-      << ">.";
-
-  *stream << " " << name << "=\"" << EscapeXmlAttribute(value) << "\"";
-}
-
-// Streams a test suite XML stanza containing the given test result.
-void XmlUnitTestResultPrinter::OutputXmlTestSuiteForTestResult(
-    ::std::ostream* stream, const TestResult& result) {
-  // Output the boilerplate for a minimal test suite with one test.
-  *stream << "  <testsuite";
-  OutputXmlAttribute(stream, "testsuite", "name", "NonTestSuiteFailure");
-  OutputXmlAttribute(stream, "testsuite", "tests", "1");
-  OutputXmlAttribute(stream, "testsuite", "failures", "1");
-  OutputXmlAttribute(stream, "testsuite", "disabled", "0");
-  OutputXmlAttribute(stream, "testsuite", "skipped", "0");
-  OutputXmlAttribute(stream, "testsuite", "errors", "0");
-  OutputXmlAttribute(stream, "testsuite", "time",
-                     FormatTimeInMillisAsSeconds(result.elapsed_time()));
-  OutputXmlAttribute(
-      stream, "testsuite", "timestamp",
-      FormatEpochTimeInMillisAsIso8601(result.start_timestamp()));
-  *stream << ">";
-
-  // Output the boilerplate for a minimal test case with a single test.
-  *stream << "    <testcase";
-  OutputXmlAttribute(stream, "testcase", "name", "");
-  OutputXmlAttribute(stream, "testcase", "status", "run");
-  OutputXmlAttribute(stream, "testcase", "result", "completed");
-  OutputXmlAttribute(stream, "testcase", "classname", "");
-  OutputXmlAttribute(stream, "testcase", "time",
-                     FormatTimeInMillisAsSeconds(result.elapsed_time()));
-  OutputXmlAttribute(
-      stream, "testcase", "timestamp",
-      FormatEpochTimeInMillisAsIso8601(result.start_timestamp()));
-
-  // Output the actual test result.
-  OutputXmlTestResult(stream, result);
-
-  // Complete the test suite.
-  *stream << "  </testsuite>\n";
-}
-
-// Prints an XML representation of a TestInfo object.
-void XmlUnitTestResultPrinter::OutputXmlTestInfo(::std::ostream* stream,
-                                                 const char* test_suite_name,
-                                                 const TestInfo& test_info) {
-  const TestResult& result = *test_info.result();
-  const std::string kTestsuite = "testcase";
-
-  if (test_info.is_in_another_shard()) {
-    return;
-  }
-
-  *stream << "    <testcase";
-  OutputXmlAttribute(stream, kTestsuite, "name", test_info.name());
-
-  if (test_info.value_param() != nullptr) {
-    OutputXmlAttribute(stream, kTestsuite, "value_param",
-                       test_info.value_param());
-  }
-  if (test_info.type_param() != nullptr) {
-    OutputXmlAttribute(stream, kTestsuite, "type_param",
-                       test_info.type_param());
-  }
-  if (GTEST_FLAG(list_tests)) {
-    OutputXmlAttribute(stream, kTestsuite, "file", test_info.file());
-    OutputXmlAttribute(stream, kTestsuite, "line",
-                       StreamableToString(test_info.line()));
-    *stream << " />\n";
-    return;
-  }
-
-  OutputXmlAttribute(stream, kTestsuite, "status",
-                     test_info.should_run() ? "run" : "notrun");
-  OutputXmlAttribute(stream, kTestsuite, "result",
-                     test_info.should_run()
-                         ? (result.Skipped() ? "skipped" : "completed")
-                         : "suppressed");
-  OutputXmlAttribute(stream, kTestsuite, "time",
-                     FormatTimeInMillisAsSeconds(result.elapsed_time()));
-  OutputXmlAttribute(
-      stream, kTestsuite, "timestamp",
-      FormatEpochTimeInMillisAsIso8601(result.start_timestamp()));
-  OutputXmlAttribute(stream, kTestsuite, "classname", test_suite_name);
-
-  OutputXmlTestResult(stream, result);
-}
-
-void XmlUnitTestResultPrinter::OutputXmlTestResult(::std::ostream* stream,
-                                                   const TestResult& result) {
-  int failures = 0;
-  int skips = 0;
-  for (int i = 0; i < result.total_part_count(); ++i) {
-    const TestPartResult& part = result.GetTestPartResult(i);
-    if (part.failed()) {
-      if (++failures == 1 && skips == 0) {
-        *stream << ">\n";
-      }
-      const std::string location =
-          internal::FormatCompilerIndependentFileLocation(part.file_name(),
-                                                          part.line_number());
-      const std::string summary = location + "\n" + part.summary();
-      *stream << "      <failure message=\""
-              << EscapeXmlAttribute(summary)
-              << "\" type=\"\">";
-      const std::string detail = location + "\n" + part.message();
-      OutputXmlCDataSection(stream, RemoveInvalidXmlCharacters(detail).c_str());
-      *stream << "</failure>\n";
-    } else if (part.skipped()) {
-      if (++skips == 1 && failures == 0) {
-        *stream << ">\n";
-      }
-      const std::string location =
-          internal::FormatCompilerIndependentFileLocation(part.file_name(),
-                                                          part.line_number());
-      const std::string summary = location + "\n" + part.summary();
-      *stream << "      <skipped message=\""
-              << EscapeXmlAttribute(summary.c_str()) << "\">";
-      const std::string detail = location + "\n" + part.message();
-      OutputXmlCDataSection(stream, RemoveInvalidXmlCharacters(detail).c_str());
-      *stream << "</skipped>\n";
-    }
-  }
-
-  if (failures == 0 && skips == 0 && result.test_property_count() == 0) {
-    *stream << " />\n";
-  } else {
-    if (failures == 0 && skips == 0) {
-      *stream << ">\n";
-    }
-    OutputXmlTestProperties(stream, result);
-    *stream << "    </testcase>\n";
-  }
-}
-
-// Prints an XML representation of a TestSuite object
-void XmlUnitTestResultPrinter::PrintXmlTestSuite(std::ostream* stream,
-                                                 const TestSuite& test_suite) {
-  const std::string kTestsuite = "testsuite";
-  *stream << "  <" << kTestsuite;
-  OutputXmlAttribute(stream, kTestsuite, "name", test_suite.name());
-  OutputXmlAttribute(stream, kTestsuite, "tests",
-                     StreamableToString(test_suite.reportable_test_count()));
-  if (!GTEST_FLAG(list_tests)) {
-    OutputXmlAttribute(stream, kTestsuite, "failures",
-                       StreamableToString(test_suite.failed_test_count()));
-    OutputXmlAttribute(
-        stream, kTestsuite, "disabled",
-        StreamableToString(test_suite.reportable_disabled_test_count()));
-    OutputXmlAttribute(stream, kTestsuite, "skipped",
-                       StreamableToString(test_suite.skipped_test_count()));
-
-    OutputXmlAttribute(stream, kTestsuite, "errors", "0");
-
-    OutputXmlAttribute(stream, kTestsuite, "time",
-                       FormatTimeInMillisAsSeconds(test_suite.elapsed_time()));
-    OutputXmlAttribute(
-        stream, kTestsuite, "timestamp",
-        FormatEpochTimeInMillisAsIso8601(test_suite.start_timestamp()));
-    *stream << TestPropertiesAsXmlAttributes(test_suite.ad_hoc_test_result());
-  }
-  *stream << ">\n";
-  for (int i = 0; i < test_suite.total_test_count(); ++i) {
-    if (test_suite.GetTestInfo(i)->is_reportable())
-      OutputXmlTestInfo(stream, test_suite.name(), *test_suite.GetTestInfo(i));
-  }
-  *stream << "  </" << kTestsuite << ">\n";
-}
-
-// Prints an XML summary of unit_test to output stream out.
-void XmlUnitTestResultPrinter::PrintXmlUnitTest(std::ostream* stream,
-                                                const UnitTest& unit_test) {
-  const std::string kTestsuites = "testsuites";
-
-  *stream << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
-  *stream << "<" << kTestsuites;
-
-  OutputXmlAttribute(stream, kTestsuites, "tests",
-                     StreamableToString(unit_test.reportable_test_count()));
-  OutputXmlAttribute(stream, kTestsuites, "failures",
-                     StreamableToString(unit_test.failed_test_count()));
-  OutputXmlAttribute(
-      stream, kTestsuites, "disabled",
-      StreamableToString(unit_test.reportable_disabled_test_count()));
-  OutputXmlAttribute(stream, kTestsuites, "errors", "0");
-  OutputXmlAttribute(stream, kTestsuites, "time",
-                     FormatTimeInMillisAsSeconds(unit_test.elapsed_time()));
-  OutputXmlAttribute(
-      stream, kTestsuites, "timestamp",
-      FormatEpochTimeInMillisAsIso8601(unit_test.start_timestamp()));
-
-  if (GTEST_FLAG(shuffle)) {
-    OutputXmlAttribute(stream, kTestsuites, "random_seed",
-                       StreamableToString(unit_test.random_seed()));
-  }
-  *stream << TestPropertiesAsXmlAttributes(unit_test.ad_hoc_test_result());
-
-  OutputXmlAttribute(stream, kTestsuites, "name", "AllTests");
-  *stream << ">\n";
-
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    if (unit_test.GetTestSuite(i)->reportable_test_count() > 0)
-      PrintXmlTestSuite(stream, *unit_test.GetTestSuite(i));
-  }
-
-  // If there was a test failure outside of one of the test suites (like in a
-  // test environment) include that in the output.
-  if (unit_test.ad_hoc_test_result().Failed()) {
-    OutputXmlTestSuiteForTestResult(stream, unit_test.ad_hoc_test_result());
-  }
-
-  *stream << "</" << kTestsuites << ">\n";
-}
-
-void XmlUnitTestResultPrinter::PrintXmlTestsList(
-    std::ostream* stream, const std::vector<TestSuite*>& test_suites) {
-  const std::string kTestsuites = "testsuites";
-
-  *stream << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
-  *stream << "<" << kTestsuites;
-
-  int total_tests = 0;
-  for (auto test_suite : test_suites) {
-    total_tests += test_suite->total_test_count();
-  }
-  OutputXmlAttribute(stream, kTestsuites, "tests",
-                     StreamableToString(total_tests));
-  OutputXmlAttribute(stream, kTestsuites, "name", "AllTests");
-  *stream << ">\n";
-
-  for (auto test_suite : test_suites) {
-    PrintXmlTestSuite(stream, *test_suite);
-  }
-  *stream << "</" << kTestsuites << ">\n";
-}
-
-// Produces a string representing the test properties in a result as space
-// delimited XML attributes based on the property key="value" pairs.
-std::string XmlUnitTestResultPrinter::TestPropertiesAsXmlAttributes(
-    const TestResult& result) {
-  Message attributes;
-  for (int i = 0; i < result.test_property_count(); ++i) {
-    const TestProperty& property = result.GetTestProperty(i);
-    attributes << " " << property.key() << "="
-        << "\"" << EscapeXmlAttribute(property.value()) << "\"";
-  }
-  return attributes.GetString();
-}
-
-void XmlUnitTestResultPrinter::OutputXmlTestProperties(
-    std::ostream* stream, const TestResult& result) {
-  const std::string kProperties = "properties";
-  const std::string kProperty = "property";
-
-  if (result.test_property_count() <= 0) {
-    return;
-  }
-
-  *stream << "<" << kProperties << ">\n";
-  for (int i = 0; i < result.test_property_count(); ++i) {
-    const TestProperty& property = result.GetTestProperty(i);
-    *stream << "<" << kProperty;
-    *stream << " name=\"" << EscapeXmlAttribute(property.key()) << "\"";
-    *stream << " value=\"" << EscapeXmlAttribute(property.value()) << "\"";
-    *stream << "/>\n";
-  }
-  *stream << "</" << kProperties << ">\n";
-}
-
-// End XmlUnitTestResultPrinter
-
-// This class generates an JSON output file.
-class JsonUnitTestResultPrinter : public EmptyTestEventListener {
- public:
-  explicit JsonUnitTestResultPrinter(const char* output_file);
-
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-
-  // Prints an JSON summary of all unit tests.
-  static void PrintJsonTestList(::std::ostream* stream,
-                                const std::vector<TestSuite*>& test_suites);
-
- private:
-  // Returns an JSON-escaped copy of the input string str.
-  static std::string EscapeJson(const std::string& str);
-
-  //// Verifies that the given attribute belongs to the given element and
-  //// streams the attribute as JSON.
-  static void OutputJsonKey(std::ostream* stream,
-                            const std::string& element_name,
-                            const std::string& name,
-                            const std::string& value,
-                            const std::string& indent,
-                            bool comma = true);
-  static void OutputJsonKey(std::ostream* stream,
-                            const std::string& element_name,
-                            const std::string& name,
-                            int value,
-                            const std::string& indent,
-                            bool comma = true);
-
-  // Streams a test suite JSON stanza containing the given test result.
-  //
-  // Requires: result.Failed()
-  static void OutputJsonTestSuiteForTestResult(::std::ostream* stream,
-                                               const TestResult& result);
-
-  // Streams a JSON representation of a TestResult object.
-  static void OutputJsonTestResult(::std::ostream* stream,
-                                   const TestResult& result);
-
-  // Streams a JSON representation of a TestInfo object.
-  static void OutputJsonTestInfo(::std::ostream* stream,
-                                 const char* test_suite_name,
-                                 const TestInfo& test_info);
-
-  // Prints a JSON representation of a TestSuite object
-  static void PrintJsonTestSuite(::std::ostream* stream,
-                                 const TestSuite& test_suite);
-
-  // Prints a JSON summary of unit_test to output stream out.
-  static void PrintJsonUnitTest(::std::ostream* stream,
-                                const UnitTest& unit_test);
-
-  // Produces a string representing the test properties in a result as
-  // a JSON dictionary.
-  static std::string TestPropertiesAsJson(const TestResult& result,
-                                          const std::string& indent);
-
-  // The output file.
-  const std::string output_file_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(JsonUnitTestResultPrinter);
-};
-
-// Creates a new JsonUnitTestResultPrinter.
-JsonUnitTestResultPrinter::JsonUnitTestResultPrinter(const char* output_file)
-    : output_file_(output_file) {
-  if (output_file_.empty()) {
-    GTEST_LOG_(FATAL) << "JSON output file may not be null";
-  }
-}
-
-void JsonUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                  int /*iteration*/) {
-  FILE* jsonout = OpenFileForWriting(output_file_);
-  std::stringstream stream;
-  PrintJsonUnitTest(&stream, unit_test);
-  fprintf(jsonout, "%s", StringStreamToString(&stream).c_str());
-  fclose(jsonout);
-}
-
-// Returns an JSON-escaped copy of the input string str.
-std::string JsonUnitTestResultPrinter::EscapeJson(const std::string& str) {
-  Message m;
-
-  for (size_t i = 0; i < str.size(); ++i) {
-    const char ch = str[i];
-    switch (ch) {
-      case '\\':
-      case '"':
-      case '/':
-        m << '\\' << ch;
-        break;
-      case '\b':
-        m << "\\b";
-        break;
-      case '\t':
-        m << "\\t";
-        break;
-      case '\n':
-        m << "\\n";
-        break;
-      case '\f':
-        m << "\\f";
-        break;
-      case '\r':
-        m << "\\r";
-        break;
-      default:
-        if (ch < ' ') {
-          m << "\\u00" << String::FormatByte(static_cast<unsigned char>(ch));
-        } else {
-          m << ch;
-        }
-        break;
-    }
-  }
-
-  return m.GetString();
-}
-
-// The following routines generate an JSON representation of a UnitTest
-// object.
-
-// Formats the given time in milliseconds as seconds.
-static std::string FormatTimeInMillisAsDuration(TimeInMillis ms) {
-  ::std::stringstream ss;
-  ss << (static_cast<double>(ms) * 1e-3) << "s";
-  return ss.str();
-}
-
-// Converts the given epoch time in milliseconds to a date string in the
-// RFC3339 format, without the timezone information.
-static std::string FormatEpochTimeInMillisAsRFC3339(TimeInMillis ms) {
-  struct tm time_struct;
-  if (!PortableLocaltime(static_cast<time_t>(ms / 1000), &time_struct))
-    return "";
-  // YYYY-MM-DDThh:mm:ss
-  return StreamableToString(time_struct.tm_year + 1900) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mon + 1) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mday) + "T" +
-      String::FormatIntWidth2(time_struct.tm_hour) + ":" +
-      String::FormatIntWidth2(time_struct.tm_min) + ":" +
-      String::FormatIntWidth2(time_struct.tm_sec) + "Z";
-}
-
-static inline std::string Indent(size_t width) {
-  return std::string(width, ' ');
-}
-
-void JsonUnitTestResultPrinter::OutputJsonKey(
-    std::ostream* stream,
-    const std::string& element_name,
-    const std::string& name,
-    const std::string& value,
-    const std::string& indent,
-    bool comma) {
-  const std::vector<std::string>& allowed_names =
-      GetReservedOutputAttributesForElement(element_name);
-
-  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
-                   allowed_names.end())
-      << "Key \"" << name << "\" is not allowed for value \"" << element_name
-      << "\".";
-
-  *stream << indent << "\"" << name << "\": \"" << EscapeJson(value) << "\"";
-  if (comma)
-    *stream << ",\n";
-}
-
-void JsonUnitTestResultPrinter::OutputJsonKey(
-    std::ostream* stream,
-    const std::string& element_name,
-    const std::string& name,
-    int value,
-    const std::string& indent,
-    bool comma) {
-  const std::vector<std::string>& allowed_names =
-      GetReservedOutputAttributesForElement(element_name);
-
-  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
-                   allowed_names.end())
-      << "Key \"" << name << "\" is not allowed for value \"" << element_name
-      << "\".";
-
-  *stream << indent << "\"" << name << "\": " << StreamableToString(value);
-  if (comma)
-    *stream << ",\n";
-}
-
-// Streams a test suite JSON stanza containing the given test result.
-void JsonUnitTestResultPrinter::OutputJsonTestSuiteForTestResult(
-    ::std::ostream* stream, const TestResult& result) {
-  // Output the boilerplate for a new test suite.
-  *stream << Indent(4) << "{\n";
-  OutputJsonKey(stream, "testsuite", "name", "NonTestSuiteFailure", Indent(6));
-  OutputJsonKey(stream, "testsuite", "tests", 1, Indent(6));
-  if (!GTEST_FLAG(list_tests)) {
-    OutputJsonKey(stream, "testsuite", "failures", 1, Indent(6));
-    OutputJsonKey(stream, "testsuite", "disabled", 0, Indent(6));
-    OutputJsonKey(stream, "testsuite", "skipped", 0, Indent(6));
-    OutputJsonKey(stream, "testsuite", "errors", 0, Indent(6));
-    OutputJsonKey(stream, "testsuite", "time",
-                  FormatTimeInMillisAsDuration(result.elapsed_time()),
-                  Indent(6));
-    OutputJsonKey(stream, "testsuite", "timestamp",
-                  FormatEpochTimeInMillisAsRFC3339(result.start_timestamp()),
-                  Indent(6));
-  }
-  *stream << Indent(6) << "\"testsuite\": [\n";
-
-  // Output the boilerplate for a new test case.
-  *stream << Indent(8) << "{\n";
-  OutputJsonKey(stream, "testcase", "name", "", Indent(10));
-  OutputJsonKey(stream, "testcase", "status", "RUN", Indent(10));
-  OutputJsonKey(stream, "testcase", "result", "COMPLETED", Indent(10));
-  OutputJsonKey(stream, "testcase", "timestamp",
-                FormatEpochTimeInMillisAsRFC3339(result.start_timestamp()),
-                Indent(10));
-  OutputJsonKey(stream, "testcase", "time",
-                FormatTimeInMillisAsDuration(result.elapsed_time()),
-                Indent(10));
-  OutputJsonKey(stream, "testcase", "classname", "", Indent(10), false);
-  *stream << TestPropertiesAsJson(result, Indent(10));
-
-  // Output the actual test result.
-  OutputJsonTestResult(stream, result);
-
-  // Finish the test suite.
-  *stream << "\n" << Indent(6) << "]\n" << Indent(4) << "}";
-}
-
-// Prints a JSON representation of a TestInfo object.
-void JsonUnitTestResultPrinter::OutputJsonTestInfo(::std::ostream* stream,
-                                                   const char* test_suite_name,
-                                                   const TestInfo& test_info) {
-  const TestResult& result = *test_info.result();
-  const std::string kTestsuite = "testcase";
-  const std::string kIndent = Indent(10);
-
-  *stream << Indent(8) << "{\n";
-  OutputJsonKey(stream, kTestsuite, "name", test_info.name(), kIndent);
-
-  if (test_info.value_param() != nullptr) {
-    OutputJsonKey(stream, kTestsuite, "value_param", test_info.value_param(),
-                  kIndent);
-  }
-  if (test_info.type_param() != nullptr) {
-    OutputJsonKey(stream, kTestsuite, "type_param", test_info.type_param(),
-                  kIndent);
-  }
-  if (GTEST_FLAG(list_tests)) {
-    OutputJsonKey(stream, kTestsuite, "file", test_info.file(), kIndent);
-    OutputJsonKey(stream, kTestsuite, "line", test_info.line(), kIndent, false);
-    *stream << "\n" << Indent(8) << "}";
-    return;
-  }
-
-  OutputJsonKey(stream, kTestsuite, "status",
-                test_info.should_run() ? "RUN" : "NOTRUN", kIndent);
-  OutputJsonKey(stream, kTestsuite, "result",
-                test_info.should_run()
-                    ? (result.Skipped() ? "SKIPPED" : "COMPLETED")
-                    : "SUPPRESSED",
-                kIndent);
-  OutputJsonKey(stream, kTestsuite, "timestamp",
-                FormatEpochTimeInMillisAsRFC3339(result.start_timestamp()),
-                kIndent);
-  OutputJsonKey(stream, kTestsuite, "time",
-                FormatTimeInMillisAsDuration(result.elapsed_time()), kIndent);
-  OutputJsonKey(stream, kTestsuite, "classname", test_suite_name, kIndent,
-                false);
-  *stream << TestPropertiesAsJson(result, kIndent);
-
-  OutputJsonTestResult(stream, result);
-}
-
-void JsonUnitTestResultPrinter::OutputJsonTestResult(::std::ostream* stream,
-                                                     const TestResult& result) {
-  const std::string kIndent = Indent(10);
-
-  int failures = 0;
-  for (int i = 0; i < result.total_part_count(); ++i) {
-    const TestPartResult& part = result.GetTestPartResult(i);
-    if (part.failed()) {
-      *stream << ",\n";
-      if (++failures == 1) {
-        *stream << kIndent << "\"" << "failures" << "\": [\n";
-      }
-      const std::string location =
-          internal::FormatCompilerIndependentFileLocation(part.file_name(),
-                                                          part.line_number());
-      const std::string message = EscapeJson(location + "\n" + part.message());
-      *stream << kIndent << "  {\n"
-              << kIndent << "    \"failure\": \"" << message << "\",\n"
-              << kIndent << "    \"type\": \"\"\n"
-              << kIndent << "  }";
-    }
-  }
-
-  if (failures > 0)
-    *stream << "\n" << kIndent << "]";
-  *stream << "\n" << Indent(8) << "}";
-}
-
-// Prints an JSON representation of a TestSuite object
-void JsonUnitTestResultPrinter::PrintJsonTestSuite(
-    std::ostream* stream, const TestSuite& test_suite) {
-  const std::string kTestsuite = "testsuite";
-  const std::string kIndent = Indent(6);
-
-  *stream << Indent(4) << "{\n";
-  OutputJsonKey(stream, kTestsuite, "name", test_suite.name(), kIndent);
-  OutputJsonKey(stream, kTestsuite, "tests", test_suite.reportable_test_count(),
-                kIndent);
-  if (!GTEST_FLAG(list_tests)) {
-    OutputJsonKey(stream, kTestsuite, "failures",
-                  test_suite.failed_test_count(), kIndent);
-    OutputJsonKey(stream, kTestsuite, "disabled",
-                  test_suite.reportable_disabled_test_count(), kIndent);
-    OutputJsonKey(stream, kTestsuite, "errors", 0, kIndent);
-    OutputJsonKey(
-        stream, kTestsuite, "timestamp",
-        FormatEpochTimeInMillisAsRFC3339(test_suite.start_timestamp()),
-        kIndent);
-    OutputJsonKey(stream, kTestsuite, "time",
-                  FormatTimeInMillisAsDuration(test_suite.elapsed_time()),
-                  kIndent, false);
-    *stream << TestPropertiesAsJson(test_suite.ad_hoc_test_result(), kIndent)
-            << ",\n";
-  }
-
-  *stream << kIndent << "\"" << kTestsuite << "\": [\n";
-
-  bool comma = false;
-  for (int i = 0; i < test_suite.total_test_count(); ++i) {
-    if (test_suite.GetTestInfo(i)->is_reportable()) {
-      if (comma) {
-        *stream << ",\n";
-      } else {
-        comma = true;
-      }
-      OutputJsonTestInfo(stream, test_suite.name(), *test_suite.GetTestInfo(i));
-    }
-  }
-  *stream << "\n" << kIndent << "]\n" << Indent(4) << "}";
-}
-
-// Prints a JSON summary of unit_test to output stream out.
-void JsonUnitTestResultPrinter::PrintJsonUnitTest(std::ostream* stream,
-                                                  const UnitTest& unit_test) {
-  const std::string kTestsuites = "testsuites";
-  const std::string kIndent = Indent(2);
-  *stream << "{\n";
-
-  OutputJsonKey(stream, kTestsuites, "tests", unit_test.reportable_test_count(),
-                kIndent);
-  OutputJsonKey(stream, kTestsuites, "failures", unit_test.failed_test_count(),
-                kIndent);
-  OutputJsonKey(stream, kTestsuites, "disabled",
-                unit_test.reportable_disabled_test_count(), kIndent);
-  OutputJsonKey(stream, kTestsuites, "errors", 0, kIndent);
-  if (GTEST_FLAG(shuffle)) {
-    OutputJsonKey(stream, kTestsuites, "random_seed", unit_test.random_seed(),
-                  kIndent);
-  }
-  OutputJsonKey(stream, kTestsuites, "timestamp",
-                FormatEpochTimeInMillisAsRFC3339(unit_test.start_timestamp()),
-                kIndent);
-  OutputJsonKey(stream, kTestsuites, "time",
-                FormatTimeInMillisAsDuration(unit_test.elapsed_time()), kIndent,
-                false);
-
-  *stream << TestPropertiesAsJson(unit_test.ad_hoc_test_result(), kIndent)
-          << ",\n";
-
-  OutputJsonKey(stream, kTestsuites, "name", "AllTests", kIndent);
-  *stream << kIndent << "\"" << kTestsuites << "\": [\n";
-
-  bool comma = false;
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    if (unit_test.GetTestSuite(i)->reportable_test_count() > 0) {
-      if (comma) {
-        *stream << ",\n";
-      } else {
-        comma = true;
-      }
-      PrintJsonTestSuite(stream, *unit_test.GetTestSuite(i));
-    }
-  }
-
-  // If there was a test failure outside of one of the test suites (like in a
-  // test environment) include that in the output.
-  if (unit_test.ad_hoc_test_result().Failed()) {
-    OutputJsonTestSuiteForTestResult(stream, unit_test.ad_hoc_test_result());
-  }
-
-  *stream << "\n" << kIndent << "]\n" << "}\n";
-}
-
-void JsonUnitTestResultPrinter::PrintJsonTestList(
-    std::ostream* stream, const std::vector<TestSuite*>& test_suites) {
-  const std::string kTestsuites = "testsuites";
-  const std::string kIndent = Indent(2);
-  *stream << "{\n";
-  int total_tests = 0;
-  for (auto test_suite : test_suites) {
-    total_tests += test_suite->total_test_count();
-  }
-  OutputJsonKey(stream, kTestsuites, "tests", total_tests, kIndent);
-
-  OutputJsonKey(stream, kTestsuites, "name", "AllTests", kIndent);
-  *stream << kIndent << "\"" << kTestsuites << "\": [\n";
-
-  for (size_t i = 0; i < test_suites.size(); ++i) {
-    if (i != 0) {
-      *stream << ",\n";
-    }
-    PrintJsonTestSuite(stream, *test_suites[i]);
-  }
-
-  *stream << "\n"
-          << kIndent << "]\n"
-          << "}\n";
-}
-// Produces a string representing the test properties in a result as
-// a JSON dictionary.
-std::string JsonUnitTestResultPrinter::TestPropertiesAsJson(
-    const TestResult& result, const std::string& indent) {
-  Message attributes;
-  for (int i = 0; i < result.test_property_count(); ++i) {
-    const TestProperty& property = result.GetTestProperty(i);
-    attributes << ",\n" << indent << "\"" << property.key() << "\": "
-               << "\"" << EscapeJson(property.value()) << "\"";
-  }
-  return attributes.GetString();
-}
-
-// End JsonUnitTestResultPrinter
-
-#if GTEST_CAN_STREAM_RESULTS_
-
-// Checks if str contains '=', '&', '%' or '\n' characters. If yes,
-// replaces them by "%xx" where xx is their hexadecimal value. For
-// example, replaces "=" with "%3D".  This algorithm is O(strlen(str))
-// in both time and space -- important as the input str may contain an
-// arbitrarily long test failure message and stack trace.
-std::string StreamingListener::UrlEncode(const char* str) {
-  std::string result;
-  result.reserve(strlen(str) + 1);
-  for (char ch = *str; ch != '\0'; ch = *++str) {
-    switch (ch) {
-      case '%':
-      case '=':
-      case '&':
-      case '\n':
-        result.append("%" + String::FormatByte(static_cast<unsigned char>(ch)));
-        break;
-      default:
-        result.push_back(ch);
-        break;
-    }
-  }
-  return result;
-}
-
-void StreamingListener::SocketWriter::MakeConnection() {
-  GTEST_CHECK_(sockfd_ == -1)
-      << "MakeConnection() can't be called when there is already a connection.";
-
-  addrinfo hints;
-  memset(&hints, 0, sizeof(hints));
-  hints.ai_family = AF_UNSPEC;    // To allow both IPv4 and IPv6 addresses.
-  hints.ai_socktype = SOCK_STREAM;
-  addrinfo* servinfo = nullptr;
-
-  // Use the getaddrinfo() to get a linked list of IP addresses for
-  // the given host name.
-  const int error_num = getaddrinfo(
-      host_name_.c_str(), port_num_.c_str(), &hints, &servinfo);
-  if (error_num != 0) {
-    GTEST_LOG_(WARNING) << "stream_result_to: getaddrinfo() failed: "
-                        << gai_strerror(error_num);
-  }
-
-  // Loop through all the results and connect to the first we can.
-  for (addrinfo* cur_addr = servinfo; sockfd_ == -1 && cur_addr != nullptr;
-       cur_addr = cur_addr->ai_next) {
-    sockfd_ = socket(
-        cur_addr->ai_family, cur_addr->ai_socktype, cur_addr->ai_protocol);
-    if (sockfd_ != -1) {
-      // Connect the client socket to the server socket.
-      if (connect(sockfd_, cur_addr->ai_addr, cur_addr->ai_addrlen) == -1) {
-        close(sockfd_);
-        sockfd_ = -1;
-      }
-    }
-  }
-
-  freeaddrinfo(servinfo);  // all done with this structure
-
-  if (sockfd_ == -1) {
-    GTEST_LOG_(WARNING) << "stream_result_to: failed to connect to "
-                        << host_name_ << ":" << port_num_;
-  }
-}
-
-// End of class Streaming Listener
-#endif  // GTEST_CAN_STREAM_RESULTS__
-
-// class OsStackTraceGetter
-
-const char* const OsStackTraceGetterInterface::kElidedFramesMarker =
-    "... " GTEST_NAME_ " internal frames ...";
-
-std::string OsStackTraceGetter::CurrentStackTrace(int max_depth, int skip_count)
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-#if GTEST_HAS_ABSL
-  std::string result;
-
-  if (max_depth <= 0) {
-    return result;
-  }
-
-  max_depth = std::min(max_depth, kMaxStackTraceDepth);
-
-  std::vector<void*> raw_stack(max_depth);
-  // Skips the frames requested by the caller, plus this function.
-  const int raw_stack_size =
-      absl::GetStackTrace(&raw_stack[0], max_depth, skip_count + 1);
-
-  void* caller_frame = nullptr;
-  {
-    MutexLock lock(&mutex_);
-    caller_frame = caller_frame_;
-  }
-
-  for (int i = 0; i < raw_stack_size; ++i) {
-    if (raw_stack[i] == caller_frame &&
-        !GTEST_FLAG(show_internal_stack_frames)) {
-      // Add a marker to the trace and stop adding frames.
-      absl::StrAppend(&result, kElidedFramesMarker, "\n");
-      break;
-    }
-
-    char tmp[1024];
-    const char* symbol = "(unknown)";
-    if (absl::Symbolize(raw_stack[i], tmp, sizeof(tmp))) {
-      symbol = tmp;
-    }
-
-    char line[1024];
-    snprintf(line, sizeof(line), "  %p: %s\n", raw_stack[i], symbol);
-    result += line;
-  }
-
-  return result;
-
-#else  // !GTEST_HAS_ABSL
-  static_cast<void>(max_depth);
-  static_cast<void>(skip_count);
-  return "";
-#endif  // GTEST_HAS_ABSL
-}
-
-void OsStackTraceGetter::UponLeavingGTest() GTEST_LOCK_EXCLUDED_(mutex_) {
-#if GTEST_HAS_ABSL
-  void* caller_frame = nullptr;
-  if (absl::GetStackTrace(&caller_frame, 1, 3) <= 0) {
-    caller_frame = nullptr;
-  }
-
-  MutexLock lock(&mutex_);
-  caller_frame_ = caller_frame;
-#endif  // GTEST_HAS_ABSL
-}
-
-// A helper class that creates the premature-exit file in its
-// constructor and deletes the file in its destructor.
-class ScopedPrematureExitFile {
- public:
-  explicit ScopedPrematureExitFile(const char* premature_exit_filepath)
-      : premature_exit_filepath_(premature_exit_filepath ?
-                                 premature_exit_filepath : "") {
-    // If a path to the premature-exit file is specified...
-    if (!premature_exit_filepath_.empty()) {
-      // create the file with a single "0" character in it.  I/O
-      // errors are ignored as there's nothing better we can do and we
-      // don't want to fail the test because of this.
-      FILE* pfile = posix::FOpen(premature_exit_filepath, "w");
-      fwrite("0", 1, 1, pfile);
-      fclose(pfile);
-    }
-  }
-
-  ~ScopedPrematureExitFile() {
-#if !defined GTEST_OS_ESP8266
-    if (!premature_exit_filepath_.empty()) {
-      int retval = remove(premature_exit_filepath_.c_str());
-      if (retval) {
-        GTEST_LOG_(ERROR) << "Failed to remove premature exit filepath \""
-                          << premature_exit_filepath_ << "\" with error "
-                          << retval;
-      }
-    }
-#endif
-  }
-
- private:
-  const std::string premature_exit_filepath_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedPrematureExitFile);
-};
-
-}  // namespace internal
-
-// class TestEventListeners
-
-TestEventListeners::TestEventListeners()
-    : repeater_(new internal::TestEventRepeater()),
-      default_result_printer_(nullptr),
-      default_xml_generator_(nullptr) {}
-
-TestEventListeners::~TestEventListeners() { delete repeater_; }
-
-// Returns the standard listener responsible for the default console
-// output.  Can be removed from the listeners list to shut down default
-// console output.  Note that removing this object from the listener list
-// with Release transfers its ownership to the user.
-void TestEventListeners::Append(TestEventListener* listener) {
-  repeater_->Append(listener);
-}
-
-// Removes the given event listener from the list and returns it.  It then
-// becomes the caller's responsibility to delete the listener. Returns
-// NULL if the listener is not found in the list.
-TestEventListener* TestEventListeners::Release(TestEventListener* listener) {
-  if (listener == default_result_printer_)
-    default_result_printer_ = nullptr;
-  else if (listener == default_xml_generator_)
-    default_xml_generator_ = nullptr;
-  return repeater_->Release(listener);
-}
-
-// Returns repeater that broadcasts the TestEventListener events to all
-// subscribers.
-TestEventListener* TestEventListeners::repeater() { return repeater_; }
-
-// Sets the default_result_printer attribute to the provided listener.
-// The listener is also added to the listener list and previous
-// default_result_printer is removed from it and deleted. The listener can
-// also be NULL in which case it will not be added to the list. Does
-// nothing if the previous and the current listener objects are the same.
-void TestEventListeners::SetDefaultResultPrinter(TestEventListener* listener) {
-  if (default_result_printer_ != listener) {
-    // It is an error to pass this method a listener that is already in the
-    // list.
-    delete Release(default_result_printer_);
-    default_result_printer_ = listener;
-    if (listener != nullptr) Append(listener);
-  }
-}
-
-// Sets the default_xml_generator attribute to the provided listener.  The
-// listener is also added to the listener list and previous
-// default_xml_generator is removed from it and deleted. The listener can
-// also be NULL in which case it will not be added to the list. Does
-// nothing if the previous and the current listener objects are the same.
-void TestEventListeners::SetDefaultXmlGenerator(TestEventListener* listener) {
-  if (default_xml_generator_ != listener) {
-    // It is an error to pass this method a listener that is already in the
-    // list.
-    delete Release(default_xml_generator_);
-    default_xml_generator_ = listener;
-    if (listener != nullptr) Append(listener);
-  }
-}
-
-// Controls whether events will be forwarded by the repeater to the
-// listeners in the list.
-bool TestEventListeners::EventForwardingEnabled() const {
-  return repeater_->forwarding_enabled();
-}
-
-void TestEventListeners::SuppressEventForwarding() {
-  repeater_->set_forwarding_enabled(false);
-}
-
-// class UnitTest
-
-// Gets the singleton UnitTest object.  The first time this method is
-// called, a UnitTest object is constructed and returned.  Consecutive
-// calls will return the same object.
-//
-// We don't protect this under mutex_ as a user is not supposed to
-// call this before main() starts, from which point on the return
-// value will never change.
-UnitTest* UnitTest::GetInstance() {
-  // CodeGear C++Builder insists on a public destructor for the
-  // default implementation.  Use this implementation to keep good OO
-  // design with private destructor.
-
-#if defined(__BORLANDC__)
-  static UnitTest* const instance = new UnitTest;
-  return instance;
-#else
-  static UnitTest instance;
-  return &instance;
-#endif  // defined(__BORLANDC__)
-}
-
-// Gets the number of successful test suites.
-int UnitTest::successful_test_suite_count() const {
-  return impl()->successful_test_suite_count();
-}
-
-// Gets the number of failed test suites.
-int UnitTest::failed_test_suite_count() const {
-  return impl()->failed_test_suite_count();
-}
-
-// Gets the number of all test suites.
-int UnitTest::total_test_suite_count() const {
-  return impl()->total_test_suite_count();
-}
-
-// Gets the number of all test suites that contain at least one test
-// that should run.
-int UnitTest::test_suite_to_run_count() const {
-  return impl()->test_suite_to_run_count();
-}
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-int UnitTest::successful_test_case_count() const {
-  return impl()->successful_test_suite_count();
-}
-int UnitTest::failed_test_case_count() const {
-  return impl()->failed_test_suite_count();
-}
-int UnitTest::total_test_case_count() const {
-  return impl()->total_test_suite_count();
-}
-int UnitTest::test_case_to_run_count() const {
-  return impl()->test_suite_to_run_count();
-}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// Gets the number of successful tests.
-int UnitTest::successful_test_count() const {
-  return impl()->successful_test_count();
-}
-
-// Gets the number of skipped tests.
-int UnitTest::skipped_test_count() const {
-  return impl()->skipped_test_count();
-}
-
-// Gets the number of failed tests.
-int UnitTest::failed_test_count() const { return impl()->failed_test_count(); }
-
-// Gets the number of disabled tests that will be reported in the XML report.
-int UnitTest::reportable_disabled_test_count() const {
-  return impl()->reportable_disabled_test_count();
-}
-
-// Gets the number of disabled tests.
-int UnitTest::disabled_test_count() const {
-  return impl()->disabled_test_count();
-}
-
-// Gets the number of tests to be printed in the XML report.
-int UnitTest::reportable_test_count() const {
-  return impl()->reportable_test_count();
-}
-
-// Gets the number of all tests.
-int UnitTest::total_test_count() const { return impl()->total_test_count(); }
-
-// Gets the number of tests that should run.
-int UnitTest::test_to_run_count() const { return impl()->test_to_run_count(); }
-
-// Gets the time of the test program start, in ms from the start of the
-// UNIX epoch.
-internal::TimeInMillis UnitTest::start_timestamp() const {
-    return impl()->start_timestamp();
-}
-
-// Gets the elapsed time, in milliseconds.
-internal::TimeInMillis UnitTest::elapsed_time() const {
-  return impl()->elapsed_time();
-}
-
-// Returns true if and only if the unit test passed (i.e. all test suites
-// passed).
-bool UnitTest::Passed() const { return impl()->Passed(); }
-
-// Returns true if and only if the unit test failed (i.e. some test suite
-// failed or something outside of all tests failed).
-bool UnitTest::Failed() const { return impl()->Failed(); }
-
-// Gets the i-th test suite among all the test suites. i can range from 0 to
-// total_test_suite_count() - 1. If i is not in that range, returns NULL.
-const TestSuite* UnitTest::GetTestSuite(int i) const {
-  return impl()->GetTestSuite(i);
-}
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-const TestCase* UnitTest::GetTestCase(int i) const {
-  return impl()->GetTestCase(i);
-}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// Returns the TestResult containing information on test failures and
-// properties logged outside of individual test suites.
-const TestResult& UnitTest::ad_hoc_test_result() const {
-  return *impl()->ad_hoc_test_result();
-}
-
-// Gets the i-th test suite among all the test suites. i can range from 0 to
-// total_test_suite_count() - 1. If i is not in that range, returns NULL.
-TestSuite* UnitTest::GetMutableTestSuite(int i) {
-  return impl()->GetMutableSuiteCase(i);
-}
-
-// Returns the list of event listeners that can be used to track events
-// inside Google Test.
-TestEventListeners& UnitTest::listeners() {
-  return *impl()->listeners();
-}
-
-// Registers and returns a global test environment.  When a test
-// program is run, all global test environments will be set-up in the
-// order they were registered.  After all tests in the program have
-// finished, all global test environments will be torn-down in the
-// *reverse* order they were registered.
-//
-// The UnitTest object takes ownership of the given environment.
-//
-// We don't protect this under mutex_, as we only support calling it
-// from the main thread.
-Environment* UnitTest::AddEnvironment(Environment* env) {
-  if (env == nullptr) {
-    return nullptr;
-  }
-
-  impl_->environments().push_back(env);
-  return env;
-}
-
-// Adds a TestPartResult to the current TestResult object.  All Google Test
-// assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc) eventually call
-// this to report their results.  The user code should use the
-// assertion macros instead of calling this directly.
-void UnitTest::AddTestPartResult(
-    TestPartResult::Type result_type,
-    const char* file_name,
-    int line_number,
-    const std::string& message,
-    const std::string& os_stack_trace) GTEST_LOCK_EXCLUDED_(mutex_) {
-  Message msg;
-  msg << message;
-
-  internal::MutexLock lock(&mutex_);
-  if (impl_->gtest_trace_stack().size() > 0) {
-    msg << "\n" << GTEST_NAME_ << " trace:";
-
-    for (size_t i = impl_->gtest_trace_stack().size(); i > 0; --i) {
-      const internal::TraceInfo& trace = impl_->gtest_trace_stack()[i - 1];
-      msg << "\n" << internal::FormatFileLocation(trace.file, trace.line)
-          << " " << trace.message;
-    }
-  }
-
-  if (os_stack_trace.c_str() != nullptr && !os_stack_trace.empty()) {
-    msg << internal::kStackTraceMarker << os_stack_trace;
-  }
-
-  const TestPartResult result = TestPartResult(
-      result_type, file_name, line_number, msg.GetString().c_str());
-  impl_->GetTestPartResultReporterForCurrentThread()->
-      ReportTestPartResult(result);
-
-  if (result_type != TestPartResult::kSuccess &&
-      result_type != TestPartResult::kSkip) {
-    // gtest_break_on_failure takes precedence over
-    // gtest_throw_on_failure.  This allows a user to set the latter
-    // in the code (perhaps in order to use Google Test assertions
-    // with another testing framework) and specify the former on the
-    // command line for debugging.
-    if (GTEST_FLAG(break_on_failure)) {
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-      // Using DebugBreak on Windows allows gtest to still break into a debugger
-      // when a failure happens and both the --gtest_break_on_failure and
-      // the --gtest_catch_exceptions flags are specified.
-      DebugBreak();
-#elif (!defined(__native_client__)) &&            \
-    ((defined(__clang__) || defined(__GNUC__)) && \
-     (defined(__x86_64__) || defined(__i386__)))
-      // with clang/gcc we can achieve the same effect on x86 by invoking int3
-      asm("int3");
-#else
-      // Dereference nullptr through a volatile pointer to prevent the compiler
-      // from removing. We use this rather than abort() or __builtin_trap() for
-      // portability: some debuggers don't correctly trap abort().
-      *static_cast<volatile int*>(nullptr) = 1;
-#endif  // GTEST_OS_WINDOWS
-    } else if (GTEST_FLAG(throw_on_failure)) {
-#if GTEST_HAS_EXCEPTIONS
-      throw internal::GoogleTestFailureException(result);
-#else
-      // We cannot call abort() as it generates a pop-up in debug mode
-      // that cannot be suppressed in VC 7.1 or below.
-      exit(1);
-#endif
-    }
-  }
-}
-
-// Adds a TestProperty to the current TestResult object when invoked from
-// inside a test, to current TestSuite's ad_hoc_test_result_ when invoked
-// from SetUpTestSuite or TearDownTestSuite, or to the global property set
-// when invoked elsewhere.  If the result already contains a property with
-// the same key, the value will be updated.
-void UnitTest::RecordProperty(const std::string& key,
-                              const std::string& value) {
-  impl_->RecordProperty(TestProperty(key, value));
-}
-
-// Runs all tests in this UnitTest object and prints the result.
-// Returns 0 if successful, or 1 otherwise.
-//
-// We don't protect this under mutex_, as we only support calling it
-// from the main thread.
-int UnitTest::Run() {
-  const bool in_death_test_child_process =
-      internal::GTEST_FLAG(internal_run_death_test).length() > 0;
-
-  // Google Test implements this protocol for catching that a test
-  // program exits before returning control to Google Test:
-  //
-  //   1. Upon start, Google Test creates a file whose absolute path
-  //      is specified by the environment variable
-  //      TEST_PREMATURE_EXIT_FILE.
-  //   2. When Google Test has finished its work, it deletes the file.
-  //
-  // This allows a test runner to set TEST_PREMATURE_EXIT_FILE before
-  // running a Google-Test-based test program and check the existence
-  // of the file at the end of the test execution to see if it has
-  // exited prematurely.
-
-  // If we are in the child process of a death test, don't
-  // create/delete the premature exit file, as doing so is unnecessary
-  // and will confuse the parent process.  Otherwise, create/delete
-  // the file upon entering/leaving this function.  If the program
-  // somehow exits before this function has a chance to return, the
-  // premature-exit file will be left undeleted, causing a test runner
-  // that understands the premature-exit-file protocol to report the
-  // test as having failed.
-  const internal::ScopedPrematureExitFile premature_exit_file(
-      in_death_test_child_process
-          ? nullptr
-          : internal::posix::GetEnv("TEST_PREMATURE_EXIT_FILE"));
-
-  // Captures the value of GTEST_FLAG(catch_exceptions).  This value will be
-  // used for the duration of the program.
-  impl()->set_catch_exceptions(GTEST_FLAG(catch_exceptions));
-
-#if GTEST_OS_WINDOWS
-  // Either the user wants Google Test to catch exceptions thrown by the
-  // tests or this is executing in the context of death test child
-  // process. In either case the user does not want to see pop-up dialogs
-  // about crashes - they are expected.
-  if (impl()->catch_exceptions() || in_death_test_child_process) {
-# if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-    // SetErrorMode doesn't exist on CE.
-    SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOALIGNMENTFAULTEXCEPT |
-                 SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX);
-# endif  // !GTEST_OS_WINDOWS_MOBILE
-
-# if (defined(_MSC_VER) || GTEST_OS_WINDOWS_MINGW) && !GTEST_OS_WINDOWS_MOBILE
-    // Death test children can be terminated with _abort().  On Windows,
-    // _abort() can show a dialog with a warning message.  This forces the
-    // abort message to go to stderr instead.
-    _set_error_mode(_OUT_TO_STDERR);
-# endif
-
-# if defined(_MSC_VER) && !GTEST_OS_WINDOWS_MOBILE
-    // In the debug version, Visual Studio pops up a separate dialog
-    // offering a choice to debug the aborted program. We need to suppress
-    // this dialog or it will pop up for every EXPECT/ASSERT_DEATH statement
-    // executed. Google Test will notify the user of any unexpected
-    // failure via stderr.
-    if (!GTEST_FLAG(break_on_failure))
-      _set_abort_behavior(
-          0x0,                                    // Clear the following flags:
-          _WRITE_ABORT_MSG | _CALL_REPORTFAULT);  // pop-up window, core dump.
-
-    // In debug mode, the Windows CRT can crash with an assertion over invalid
-    // input (e.g. passing an invalid file descriptor).  The default handling
-    // for these assertions is to pop up a dialog and wait for user input.
-    // Instead ask the CRT to dump such assertions to stderr non-interactively.
-    if (!IsDebuggerPresent()) {
-      (void)_CrtSetReportMode(_CRT_ASSERT,
-                              _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
-      (void)_CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
-    }
-# endif
-  }
-#endif  // GTEST_OS_WINDOWS
-
-  return internal::HandleExceptionsInMethodIfSupported(
-      impl(),
-      &internal::UnitTestImpl::RunAllTests,
-      "auxiliary test code (environments or event listeners)") ? 0 : 1;
-}
-
-// Returns the working directory when the first TEST() or TEST_F() was
-// executed.
-const char* UnitTest::original_working_dir() const {
-  return impl_->original_working_dir_.c_str();
-}
-
-// Returns the TestSuite object for the test that's currently running,
-// or NULL if no test is running.
-const TestSuite* UnitTest::current_test_suite() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  return impl_->current_test_suite();
-}
-
-// Legacy API is still available but deprecated
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-const TestCase* UnitTest::current_test_case() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  return impl_->current_test_suite();
-}
-#endif
-
-// Returns the TestInfo object for the test that's currently running,
-// or NULL if no test is running.
-const TestInfo* UnitTest::current_test_info() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  return impl_->current_test_info();
-}
-
-// Returns the random seed used at the start of the current test run.
-int UnitTest::random_seed() const { return impl_->random_seed(); }
-
-// Returns ParameterizedTestSuiteRegistry object used to keep track of
-// value-parameterized tests and instantiate and register them.
-internal::ParameterizedTestSuiteRegistry&
-UnitTest::parameterized_test_registry() GTEST_LOCK_EXCLUDED_(mutex_) {
-  return impl_->parameterized_test_registry();
-}
-
-// Creates an empty UnitTest.
-UnitTest::UnitTest() {
-  impl_ = new internal::UnitTestImpl(this);
-}
-
-// Destructor of UnitTest.
-UnitTest::~UnitTest() {
-  delete impl_;
-}
-
-// Pushes a trace defined by SCOPED_TRACE() on to the per-thread
-// Google Test trace stack.
-void UnitTest::PushGTestTrace(const internal::TraceInfo& trace)
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  impl_->gtest_trace_stack().push_back(trace);
-}
-
-// Pops a trace from the per-thread Google Test trace stack.
-void UnitTest::PopGTestTrace()
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  impl_->gtest_trace_stack().pop_back();
-}
-
-namespace internal {
-
-UnitTestImpl::UnitTestImpl(UnitTest* parent)
-    : parent_(parent),
-      GTEST_DISABLE_MSC_WARNINGS_PUSH_(4355 /* using this in initializer */)
-          default_global_test_part_result_reporter_(this),
-      default_per_thread_test_part_result_reporter_(this),
-      GTEST_DISABLE_MSC_WARNINGS_POP_() global_test_part_result_repoter_(
-          &default_global_test_part_result_reporter_),
-      per_thread_test_part_result_reporter_(
-          &default_per_thread_test_part_result_reporter_),
-      parameterized_test_registry_(),
-      parameterized_tests_registered_(false),
-      last_death_test_suite_(-1),
-      current_test_suite_(nullptr),
-      current_test_info_(nullptr),
-      ad_hoc_test_result_(),
-      os_stack_trace_getter_(nullptr),
-      post_flag_parse_init_performed_(false),
-      random_seed_(0),  // Will be overridden by the flag before first use.
-      random_(0),       // Will be reseeded before first use.
-      start_timestamp_(0),
-      elapsed_time_(0),
-#if GTEST_HAS_DEATH_TEST
-      death_test_factory_(new DefaultDeathTestFactory),
-#endif
-      // Will be overridden by the flag before first use.
-      catch_exceptions_(false) {
-  listeners()->SetDefaultResultPrinter(new PrettyUnitTestResultPrinter);
-}
-
-UnitTestImpl::~UnitTestImpl() {
-  // Deletes every TestSuite.
-  ForEach(test_suites_, internal::Delete<TestSuite>);
-
-  // Deletes every Environment.
-  ForEach(environments_, internal::Delete<Environment>);
-
-  delete os_stack_trace_getter_;
-}
-
-// Adds a TestProperty to the current TestResult object when invoked in a
-// context of a test, to current test suite's ad_hoc_test_result when invoke
-// from SetUpTestSuite/TearDownTestSuite, or to the global property set
-// otherwise.  If the result already contains a property with the same key,
-// the value will be updated.
-void UnitTestImpl::RecordProperty(const TestProperty& test_property) {
-  std::string xml_element;
-  TestResult* test_result;  // TestResult appropriate for property recording.
-
-  if (current_test_info_ != nullptr) {
-    xml_element = "testcase";
-    test_result = &(current_test_info_->result_);
-  } else if (current_test_suite_ != nullptr) {
-    xml_element = "testsuite";
-    test_result = &(current_test_suite_->ad_hoc_test_result_);
-  } else {
-    xml_element = "testsuites";
-    test_result = &ad_hoc_test_result_;
-  }
-  test_result->RecordProperty(xml_element, test_property);
-}
-
-#if GTEST_HAS_DEATH_TEST
-// Disables event forwarding if the control is currently in a death test
-// subprocess. Must not be called before InitGoogleTest.
-void UnitTestImpl::SuppressTestEventsIfInSubprocess() {
-  if (internal_run_death_test_flag_.get() != nullptr)
-    listeners()->SuppressEventForwarding();
-}
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Initializes event listeners performing XML output as specified by
-// UnitTestOptions. Must not be called before InitGoogleTest.
-void UnitTestImpl::ConfigureXmlOutput() {
-  const std::string& output_format = UnitTestOptions::GetOutputFormat();
-  if (output_format == "xml") {
-    listeners()->SetDefaultXmlGenerator(new XmlUnitTestResultPrinter(
-        UnitTestOptions::GetAbsolutePathToOutputFile().c_str()));
-  } else if (output_format == "json") {
-    listeners()->SetDefaultXmlGenerator(new JsonUnitTestResultPrinter(
-        UnitTestOptions::GetAbsolutePathToOutputFile().c_str()));
-  } else if (output_format != "") {
-    GTEST_LOG_(WARNING) << "WARNING: unrecognized output format \""
-                        << output_format << "\" ignored.";
-  }
-}
-
-#if GTEST_CAN_STREAM_RESULTS_
-// Initializes event listeners for streaming test results in string form.
-// Must not be called before InitGoogleTest.
-void UnitTestImpl::ConfigureStreamingOutput() {
-  const std::string& target = GTEST_FLAG(stream_result_to);
-  if (!target.empty()) {
-    const size_t pos = target.find(':');
-    if (pos != std::string::npos) {
-      listeners()->Append(new StreamingListener(target.substr(0, pos),
-                                                target.substr(pos+1)));
-    } else {
-      GTEST_LOG_(WARNING) << "unrecognized streaming target \"" << target
-                          << "\" ignored.";
-    }
-  }
-}
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-// Performs initialization dependent upon flag values obtained in
-// ParseGoogleTestFlagsOnly.  Is called from InitGoogleTest after the call to
-// ParseGoogleTestFlagsOnly.  In case a user neglects to call InitGoogleTest
-// this function is also called from RunAllTests.  Since this function can be
-// called more than once, it has to be idempotent.
-void UnitTestImpl::PostFlagParsingInit() {
-  // Ensures that this function does not execute more than once.
-  if (!post_flag_parse_init_performed_) {
-    post_flag_parse_init_performed_ = true;
-
-#if defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)
-    // Register to send notifications about key process state changes.
-    listeners()->Append(new GTEST_CUSTOM_TEST_EVENT_LISTENER_());
-#endif  // defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)
-
-#if GTEST_HAS_DEATH_TEST
-    InitDeathTestSubprocessControlInfo();
-    SuppressTestEventsIfInSubprocess();
-#endif  // GTEST_HAS_DEATH_TEST
-
-    // Registers parameterized tests. This makes parameterized tests
-    // available to the UnitTest reflection API without running
-    // RUN_ALL_TESTS.
-    RegisterParameterizedTests();
-
-    // Configures listeners for XML output. This makes it possible for users
-    // to shut down the default XML output before invoking RUN_ALL_TESTS.
-    ConfigureXmlOutput();
-
-    if (GTEST_FLAG(brief)) {
-      listeners()->SetDefaultResultPrinter(new BriefUnitTestResultPrinter);
-    }
-
-#if GTEST_CAN_STREAM_RESULTS_
-    // Configures listeners for streaming test results to the specified server.
-    ConfigureStreamingOutput();
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-#if GTEST_HAS_ABSL
-    if (GTEST_FLAG(install_failure_signal_handler)) {
-      absl::FailureSignalHandlerOptions options;
-      absl::InstallFailureSignalHandler(options);
-    }
-#endif  // GTEST_HAS_ABSL
-  }
-}
-
-// A predicate that checks the name of a TestSuite against a known
-// value.
-//
-// This is used for implementation of the UnitTest class only.  We put
-// it in the anonymous namespace to prevent polluting the outer
-// namespace.
-//
-// TestSuiteNameIs is copyable.
-class TestSuiteNameIs {
- public:
-  // Constructor.
-  explicit TestSuiteNameIs(const std::string& name) : name_(name) {}
-
-  // Returns true if and only if the name of test_suite matches name_.
-  bool operator()(const TestSuite* test_suite) const {
-    return test_suite != nullptr &&
-           strcmp(test_suite->name(), name_.c_str()) == 0;
-  }
-
- private:
-  std::string name_;
-};
-
-// Finds and returns a TestSuite with the given name.  If one doesn't
-// exist, creates one and returns it.  It's the CALLER'S
-// RESPONSIBILITY to ensure that this function is only called WHEN THE
-// TESTS ARE NOT SHUFFLED.
-//
-// Arguments:
-//
-//   test_suite_name: name of the test suite
-//   type_param:      the name of the test suite's type parameter, or NULL if
-//                    this is not a typed or a type-parameterized test suite.
-//   set_up_tc:       pointer to the function that sets up the test suite
-//   tear_down_tc:    pointer to the function that tears down the test suite
-TestSuite* UnitTestImpl::GetTestSuite(
-    const char* test_suite_name, const char* type_param,
-    internal::SetUpTestSuiteFunc set_up_tc,
-    internal::TearDownTestSuiteFunc tear_down_tc) {
-  // Can we find a TestSuite with the given name?
-  const auto test_suite =
-      std::find_if(test_suites_.rbegin(), test_suites_.rend(),
-                   TestSuiteNameIs(test_suite_name));
-
-  if (test_suite != test_suites_.rend()) return *test_suite;
-
-  // No.  Let's create one.
-  auto* const new_test_suite =
-      new TestSuite(test_suite_name, type_param, set_up_tc, tear_down_tc);
-
-  // Is this a death test suite?
-  if (internal::UnitTestOptions::MatchesFilter(test_suite_name,
-                                               kDeathTestSuiteFilter)) {
-    // Yes.  Inserts the test suite after the last death test suite
-    // defined so far.  This only works when the test suites haven't
-    // been shuffled.  Otherwise we may end up running a death test
-    // after a non-death test.
-    ++last_death_test_suite_;
-    test_suites_.insert(test_suites_.begin() + last_death_test_suite_,
-                        new_test_suite);
-  } else {
-    // No.  Appends to the end of the list.
-    test_suites_.push_back(new_test_suite);
-  }
-
-  test_suite_indices_.push_back(static_cast<int>(test_suite_indices_.size()));
-  return new_test_suite;
-}
-
-// Helpers for setting up / tearing down the given environment.  They
-// are for use in the ForEach() function.
-static void SetUpEnvironment(Environment* env) { env->SetUp(); }
-static void TearDownEnvironment(Environment* env) { env->TearDown(); }
-
-// Runs all tests in this UnitTest object, prints the result, and
-// returns true if all tests are successful.  If any exception is
-// thrown during a test, the test is considered to be failed, but the
-// rest of the tests will still be run.
-//
-// When parameterized tests are enabled, it expands and registers
-// parameterized tests first in RegisterParameterizedTests().
-// All other functions called from RunAllTests() may safely assume that
-// parameterized tests are ready to be counted and run.
-bool UnitTestImpl::RunAllTests() {
-  // True if and only if Google Test is initialized before RUN_ALL_TESTS() is
-  // called.
-  const bool gtest_is_initialized_before_run_all_tests = GTestIsInitialized();
-
-  // Do not run any test if the --help flag was specified.
-  if (g_help_flag)
-    return true;
-
-  // Repeats the call to the post-flag parsing initialization in case the
-  // user didn't call InitGoogleTest.
-  PostFlagParsingInit();
-
-  // Even if sharding is not on, test runners may want to use the
-  // GTEST_SHARD_STATUS_FILE to query whether the test supports the sharding
-  // protocol.
-  internal::WriteToShardStatusFileIfNeeded();
-
-  // True if and only if we are in a subprocess for running a thread-safe-style
-  // death test.
-  bool in_subprocess_for_death_test = false;
-
-#if GTEST_HAS_DEATH_TEST
-  in_subprocess_for_death_test =
-      (internal_run_death_test_flag_.get() != nullptr);
-# if defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
-  if (in_subprocess_for_death_test) {
-    GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_();
-  }
-# endif  // defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
-#endif  // GTEST_HAS_DEATH_TEST
-
-  const bool should_shard = ShouldShard(kTestTotalShards, kTestShardIndex,
-                                        in_subprocess_for_death_test);
-
-  // Compares the full test names with the filter to decide which
-  // tests to run.
-  const bool has_tests_to_run = FilterTests(should_shard
-                                              ? HONOR_SHARDING_PROTOCOL
-                                              : IGNORE_SHARDING_PROTOCOL) > 0;
-
-  // Lists the tests and exits if the --gtest_list_tests flag was specified.
-  if (GTEST_FLAG(list_tests)) {
-    // This must be called *after* FilterTests() has been called.
-    ListTestsMatchingFilter();
-    return true;
-  }
-
-  random_seed_ = GTEST_FLAG(shuffle) ?
-      GetRandomSeedFromFlag(GTEST_FLAG(random_seed)) : 0;
-
-  // True if and only if at least one test has failed.
-  bool failed = false;
-
-  TestEventListener* repeater = listeners()->repeater();
-
-  start_timestamp_ = GetTimeInMillis();
-  repeater->OnTestProgramStart(*parent_);
-
-  // How many times to repeat the tests?  We don't want to repeat them
-  // when we are inside the subprocess of a death test.
-  const int repeat = in_subprocess_for_death_test ? 1 : GTEST_FLAG(repeat);
-  // Repeats forever if the repeat count is negative.
-  const bool gtest_repeat_forever = repeat < 0;
-  for (int i = 0; gtest_repeat_forever || i != repeat; i++) {
-    // We want to preserve failures generated by ad-hoc test
-    // assertions executed before RUN_ALL_TESTS().
-    ClearNonAdHocTestResult();
-
-    Timer timer;
-
-    // Shuffles test suites and tests if requested.
-    if (has_tests_to_run && GTEST_FLAG(shuffle)) {
-      random()->Reseed(static_cast<uint32_t>(random_seed_));
-      // This should be done before calling OnTestIterationStart(),
-      // such that a test event listener can see the actual test order
-      // in the event.
-      ShuffleTests();
-    }
-
-    // Tells the unit test event listeners that the tests are about to start.
-    repeater->OnTestIterationStart(*parent_, i);
-
-    // Runs each test suite if there is at least one test to run.
-    if (has_tests_to_run) {
-      // Sets up all environments beforehand.
-      repeater->OnEnvironmentsSetUpStart(*parent_);
-      ForEach(environments_, SetUpEnvironment);
-      repeater->OnEnvironmentsSetUpEnd(*parent_);
-
-      // Runs the tests only if there was no fatal failure or skip triggered
-      // during global set-up.
-      if (Test::IsSkipped()) {
-        // Emit diagnostics when global set-up calls skip, as it will not be
-        // emitted by default.
-        TestResult& test_result =
-            *internal::GetUnitTestImpl()->current_test_result();
-        for (int j = 0; j < test_result.total_part_count(); ++j) {
-          const TestPartResult& test_part_result =
-              test_result.GetTestPartResult(j);
-          if (test_part_result.type() == TestPartResult::kSkip) {
-            const std::string& result = test_part_result.message();
-            printf("%s\n", result.c_str());
-          }
-        }
-        fflush(stdout);
-      } else if (!Test::HasFatalFailure()) {
-        for (int test_index = 0; test_index < total_test_suite_count();
-             test_index++) {
-          GetMutableSuiteCase(test_index)->Run();
-          if (GTEST_FLAG(fail_fast) &&
-              GetMutableSuiteCase(test_index)->Failed()) {
-            for (int j = test_index + 1; j < total_test_suite_count(); j++) {
-              GetMutableSuiteCase(j)->Skip();
-            }
-            break;
-          }
-        }
-      } else if (Test::HasFatalFailure()) {
-        // If there was a fatal failure during the global setup then we know we
-        // aren't going to run any tests. Explicitly mark all of the tests as
-        // skipped to make this obvious in the output.
-        for (int test_index = 0; test_index < total_test_suite_count();
-             test_index++) {
-          GetMutableSuiteCase(test_index)->Skip();
-        }
-      }
-
-      // Tears down all environments in reverse order afterwards.
-      repeater->OnEnvironmentsTearDownStart(*parent_);
-      std::for_each(environments_.rbegin(), environments_.rend(),
-                    TearDownEnvironment);
-      repeater->OnEnvironmentsTearDownEnd(*parent_);
-    }
-
-    elapsed_time_ = timer.Elapsed();
-
-    // Tells the unit test event listener that the tests have just finished.
-    repeater->OnTestIterationEnd(*parent_, i);
-
-    // Gets the result and clears it.
-    if (!Passed()) {
-      failed = true;
-    }
-
-    // Restores the original test order after the iteration.  This
-    // allows the user to quickly repro a failure that happens in the
-    // N-th iteration without repeating the first (N - 1) iterations.
-    // This is not enclosed in "if (GTEST_FLAG(shuffle)) { ... }", in
-    // case the user somehow changes the value of the flag somewhere
-    // (it's always safe to unshuffle the tests).
-    UnshuffleTests();
-
-    if (GTEST_FLAG(shuffle)) {
-      // Picks a new random seed for each iteration.
-      random_seed_ = GetNextRandomSeed(random_seed_);
-    }
-  }
-
-  repeater->OnTestProgramEnd(*parent_);
-
-  if (!gtest_is_initialized_before_run_all_tests) {
-    ColoredPrintf(
-        GTestColor::kRed,
-        "\nIMPORTANT NOTICE - DO NOT IGNORE:\n"
-        "This test program did NOT call " GTEST_INIT_GOOGLE_TEST_NAME_
-        "() before calling RUN_ALL_TESTS(). This is INVALID. Soon " GTEST_NAME_
-        " will start to enforce the valid usage. "
-        "Please fix it ASAP, or IT WILL START TO FAIL.\n");  // NOLINT
-#if GTEST_FOR_GOOGLE_
-    ColoredPrintf(GTestColor::kRed,
-                  "For more details, see http://wiki/Main/ValidGUnitMain.\n");
-#endif  // GTEST_FOR_GOOGLE_
-  }
-
-  return !failed;
-}
-
-// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
-// if the variable is present. If a file already exists at this location, this
-// function will write over it. If the variable is present, but the file cannot
-// be created, prints an error and exits.
-void WriteToShardStatusFileIfNeeded() {
-  const char* const test_shard_file = posix::GetEnv(kTestShardStatusFile);
-  if (test_shard_file != nullptr) {
-    FILE* const file = posix::FOpen(test_shard_file, "w");
-    if (file == nullptr) {
-      ColoredPrintf(GTestColor::kRed,
-                    "Could not write to the test shard status file \"%s\" "
-                    "specified by the %s environment variable.\n",
-                    test_shard_file, kTestShardStatusFile);
-      fflush(stdout);
-      exit(EXIT_FAILURE);
-    }
-    fclose(file);
-  }
-}
-
-// Checks whether sharding is enabled by examining the relevant
-// environment variable values. If the variables are present,
-// but inconsistent (i.e., shard_index >= total_shards), prints
-// an error and exits. If in_subprocess_for_death_test, sharding is
-// disabled because it must only be applied to the original test
-// process. Otherwise, we could filter out death tests we intended to execute.
-bool ShouldShard(const char* total_shards_env,
-                 const char* shard_index_env,
-                 bool in_subprocess_for_death_test) {
-  if (in_subprocess_for_death_test) {
-    return false;
-  }
-
-  const int32_t total_shards = Int32FromEnvOrDie(total_shards_env, -1);
-  const int32_t shard_index = Int32FromEnvOrDie(shard_index_env, -1);
-
-  if (total_shards == -1 && shard_index == -1) {
-    return false;
-  } else if (total_shards == -1 && shard_index != -1) {
-    const Message msg = Message()
-      << "Invalid environment variables: you have "
-      << kTestShardIndex << " = " << shard_index
-      << ", but have left " << kTestTotalShards << " unset.\n";
-    ColoredPrintf(GTestColor::kRed, "%s", msg.GetString().c_str());
-    fflush(stdout);
-    exit(EXIT_FAILURE);
-  } else if (total_shards != -1 && shard_index == -1) {
-    const Message msg = Message()
-      << "Invalid environment variables: you have "
-      << kTestTotalShards << " = " << total_shards
-      << ", but have left " << kTestShardIndex << " unset.\n";
-    ColoredPrintf(GTestColor::kRed, "%s", msg.GetString().c_str());
-    fflush(stdout);
-    exit(EXIT_FAILURE);
-  } else if (shard_index < 0 || shard_index >= total_shards) {
-    const Message msg = Message()
-      << "Invalid environment variables: we require 0 <= "
-      << kTestShardIndex << " < " << kTestTotalShards
-      << ", but you have " << kTestShardIndex << "=" << shard_index
-      << ", " << kTestTotalShards << "=" << total_shards << ".\n";
-    ColoredPrintf(GTestColor::kRed, "%s", msg.GetString().c_str());
-    fflush(stdout);
-    exit(EXIT_FAILURE);
-  }
-
-  return total_shards > 1;
-}
-
-// Parses the environment variable var as an Int32. If it is unset,
-// returns default_val. If it is not an Int32, prints an error
-// and aborts.
-int32_t Int32FromEnvOrDie(const char* var, int32_t default_val) {
-  const char* str_val = posix::GetEnv(var);
-  if (str_val == nullptr) {
-    return default_val;
-  }
-
-  int32_t result;
-  if (!ParseInt32(Message() << "The value of environment variable " << var,
-                  str_val, &result)) {
-    exit(EXIT_FAILURE);
-  }
-  return result;
-}
-
-// Given the total number of shards, the shard index, and the test id,
-// returns true if and only if the test should be run on this shard. The test id
-// is some arbitrary but unique non-negative integer assigned to each test
-// method. Assumes that 0 <= shard_index < total_shards.
-bool ShouldRunTestOnShard(int total_shards, int shard_index, int test_id) {
-  return (test_id % total_shards) == shard_index;
-}
-
-// Compares the name of each test with the user-specified filter to
-// decide whether the test should be run, then records the result in
-// each TestSuite and TestInfo object.
-// If shard_tests == true, further filters tests based on sharding
-// variables in the environment - see
-// https://github.com/google/googletest/blob/master/googletest/docs/advanced.md
-// . Returns the number of tests that should run.
-int UnitTestImpl::FilterTests(ReactionToSharding shard_tests) {
-  const int32_t total_shards = shard_tests == HONOR_SHARDING_PROTOCOL ?
-      Int32FromEnvOrDie(kTestTotalShards, -1) : -1;
-  const int32_t shard_index = shard_tests == HONOR_SHARDING_PROTOCOL ?
-      Int32FromEnvOrDie(kTestShardIndex, -1) : -1;
-
-  // num_runnable_tests are the number of tests that will
-  // run across all shards (i.e., match filter and are not disabled).
-  // num_selected_tests are the number of tests to be run on
-  // this shard.
-  int num_runnable_tests = 0;
-  int num_selected_tests = 0;
-  for (auto* test_suite : test_suites_) {
-    const std::string& test_suite_name = test_suite->name();
-    test_suite->set_should_run(false);
-
-    for (size_t j = 0; j < test_suite->test_info_list().size(); j++) {
-      TestInfo* const test_info = test_suite->test_info_list()[j];
-      const std::string test_name(test_info->name());
-      // A test is disabled if test suite name or test name matches
-      // kDisableTestFilter.
-      const bool is_disabled = internal::UnitTestOptions::MatchesFilter(
-                                   test_suite_name, kDisableTestFilter) ||
-                               internal::UnitTestOptions::MatchesFilter(
-                                   test_name, kDisableTestFilter);
-      test_info->is_disabled_ = is_disabled;
-
-      const bool matches_filter = internal::UnitTestOptions::FilterMatchesTest(
-          test_suite_name, test_name);
-      test_info->matches_filter_ = matches_filter;
-
-      const bool is_runnable =
-          (GTEST_FLAG(also_run_disabled_tests) || !is_disabled) &&
-          matches_filter;
-
-      const bool is_in_another_shard =
-          shard_tests != IGNORE_SHARDING_PROTOCOL &&
-          !ShouldRunTestOnShard(total_shards, shard_index, num_runnable_tests);
-      test_info->is_in_another_shard_ = is_in_another_shard;
-      const bool is_selected = is_runnable && !is_in_another_shard;
-
-      num_runnable_tests += is_runnable;
-      num_selected_tests += is_selected;
-
-      test_info->should_run_ = is_selected;
-      test_suite->set_should_run(test_suite->should_run() || is_selected);
-    }
-  }
-  return num_selected_tests;
-}
-
-// Prints the given C-string on a single line by replacing all '\n'
-// characters with string "\\n".  If the output takes more than
-// max_length characters, only prints the first max_length characters
-// and "...".
-static void PrintOnOneLine(const char* str, int max_length) {
-  if (str != nullptr) {
-    for (int i = 0; *str != '\0'; ++str) {
-      if (i >= max_length) {
-        printf("...");
-        break;
-      }
-      if (*str == '\n') {
-        printf("\\n");
-        i += 2;
-      } else {
-        printf("%c", *str);
-        ++i;
-      }
-    }
-  }
-}
-
-// Prints the names of the tests matching the user-specified filter flag.
-void UnitTestImpl::ListTestsMatchingFilter() {
-  // Print at most this many characters for each type/value parameter.
-  const int kMaxParamLength = 250;
-
-  for (auto* test_suite : test_suites_) {
-    bool printed_test_suite_name = false;
-
-    for (size_t j = 0; j < test_suite->test_info_list().size(); j++) {
-      const TestInfo* const test_info = test_suite->test_info_list()[j];
-      if (test_info->matches_filter_) {
-        if (!printed_test_suite_name) {
-          printed_test_suite_name = true;
-          printf("%s.", test_suite->name());
-          if (test_suite->type_param() != nullptr) {
-            printf("  # %s = ", kTypeParamLabel);
-            // We print the type parameter on a single line to make
-            // the output easy to parse by a program.
-            PrintOnOneLine(test_suite->type_param(), kMaxParamLength);
-          }
-          printf("\n");
-        }
-        printf("  %s", test_info->name());
-        if (test_info->value_param() != nullptr) {
-          printf("  # %s = ", kValueParamLabel);
-          // We print the value parameter on a single line to make the
-          // output easy to parse by a program.
-          PrintOnOneLine(test_info->value_param(), kMaxParamLength);
-        }
-        printf("\n");
-      }
-    }
-  }
-  fflush(stdout);
-  const std::string& output_format = UnitTestOptions::GetOutputFormat();
-  if (output_format == "xml" || output_format == "json") {
-    FILE* fileout = OpenFileForWriting(
-        UnitTestOptions::GetAbsolutePathToOutputFile().c_str());
-    std::stringstream stream;
-    if (output_format == "xml") {
-      XmlUnitTestResultPrinter(
-          UnitTestOptions::GetAbsolutePathToOutputFile().c_str())
-          .PrintXmlTestsList(&stream, test_suites_);
-    } else if (output_format == "json") {
-      JsonUnitTestResultPrinter(
-          UnitTestOptions::GetAbsolutePathToOutputFile().c_str())
-          .PrintJsonTestList(&stream, test_suites_);
-    }
-    fprintf(fileout, "%s", StringStreamToString(&stream).c_str());
-    fclose(fileout);
-  }
-}
-
-// Sets the OS stack trace getter.
-//
-// Does nothing if the input and the current OS stack trace getter are
-// the same; otherwise, deletes the old getter and makes the input the
-// current getter.
-void UnitTestImpl::set_os_stack_trace_getter(
-    OsStackTraceGetterInterface* getter) {
-  if (os_stack_trace_getter_ != getter) {
-    delete os_stack_trace_getter_;
-    os_stack_trace_getter_ = getter;
-  }
-}
-
-// Returns the current OS stack trace getter if it is not NULL;
-// otherwise, creates an OsStackTraceGetter, makes it the current
-// getter, and returns it.
-OsStackTraceGetterInterface* UnitTestImpl::os_stack_trace_getter() {
-  if (os_stack_trace_getter_ == nullptr) {
-#ifdef GTEST_OS_STACK_TRACE_GETTER_
-    os_stack_trace_getter_ = new GTEST_OS_STACK_TRACE_GETTER_;
-#else
-    os_stack_trace_getter_ = new OsStackTraceGetter;
-#endif  // GTEST_OS_STACK_TRACE_GETTER_
-  }
-
-  return os_stack_trace_getter_;
-}
-
-// Returns the most specific TestResult currently running.
-TestResult* UnitTestImpl::current_test_result() {
-  if (current_test_info_ != nullptr) {
-    return &current_test_info_->result_;
-  }
-  if (current_test_suite_ != nullptr) {
-    return &current_test_suite_->ad_hoc_test_result_;
-  }
-  return &ad_hoc_test_result_;
-}
-
-// Shuffles all test suites, and the tests within each test suite,
-// making sure that death tests are still run first.
-void UnitTestImpl::ShuffleTests() {
-  // Shuffles the death test suites.
-  ShuffleRange(random(), 0, last_death_test_suite_ + 1, &test_suite_indices_);
-
-  // Shuffles the non-death test suites.
-  ShuffleRange(random(), last_death_test_suite_ + 1,
-               static_cast<int>(test_suites_.size()), &test_suite_indices_);
-
-  // Shuffles the tests inside each test suite.
-  for (auto& test_suite : test_suites_) {
-    test_suite->ShuffleTests(random());
-  }
-}
-
-// Restores the test suites and tests to their order before the first shuffle.
-void UnitTestImpl::UnshuffleTests() {
-  for (size_t i = 0; i < test_suites_.size(); i++) {
-    // Unshuffles the tests in each test suite.
-    test_suites_[i]->UnshuffleTests();
-    // Resets the index of each test suite.
-    test_suite_indices_[i] = static_cast<int>(i);
-  }
-}
-
-// Returns the current OS stack trace as an std::string.
-//
-// The maximum number of stack frames to be included is specified by
-// the gtest_stack_trace_depth flag.  The skip_count parameter
-// specifies the number of top frames to be skipped, which doesn't
-// count against the number of frames to be included.
-//
-// For example, if Foo() calls Bar(), which in turn calls
-// GetCurrentOsStackTraceExceptTop(..., 1), Foo() will be included in
-// the trace but Bar() and GetCurrentOsStackTraceExceptTop() won't.
-std::string GetCurrentOsStackTraceExceptTop(UnitTest* /*unit_test*/,
-                                            int skip_count) {
-  // We pass skip_count + 1 to skip this wrapper function in addition
-  // to what the user really wants to skip.
-  return GetUnitTestImpl()->CurrentOsStackTraceExceptTop(skip_count + 1);
-}
-
-// Used by the GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_ macro to
-// suppress unreachable code warnings.
-namespace {
-class ClassUniqueToAlwaysTrue {};
-}
-
-bool IsTrue(bool condition) { return condition; }
-
-bool AlwaysTrue() {
-#if GTEST_HAS_EXCEPTIONS
-  // This condition is always false so AlwaysTrue() never actually throws,
-  // but it makes the compiler think that it may throw.
-  if (IsTrue(false))
-    throw ClassUniqueToAlwaysTrue();
-#endif  // GTEST_HAS_EXCEPTIONS
-  return true;
-}
-
-// If *pstr starts with the given prefix, modifies *pstr to be right
-// past the prefix and returns true; otherwise leaves *pstr unchanged
-// and returns false.  None of pstr, *pstr, and prefix can be NULL.
-bool SkipPrefix(const char* prefix, const char** pstr) {
-  const size_t prefix_len = strlen(prefix);
-  if (strncmp(*pstr, prefix, prefix_len) == 0) {
-    *pstr += prefix_len;
-    return true;
-  }
-  return false;
-}
-
-// Parses a string as a command line flag.  The string should have
-// the format "--flag=value".  When def_optional is true, the "=value"
-// part can be omitted.
-//
-// Returns the value of the flag, or NULL if the parsing failed.
-static const char* ParseFlagValue(const char* str, const char* flag,
-                                  bool def_optional) {
-  // str and flag must not be NULL.
-  if (str == nullptr || flag == nullptr) return nullptr;
-
-  // The flag must start with "--" followed by GTEST_FLAG_PREFIX_.
-  const std::string flag_str = std::string("--") + GTEST_FLAG_PREFIX_ + flag;
-  const size_t flag_len = flag_str.length();
-  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
-
-  // Skips the flag name.
-  const char* flag_end = str + flag_len;
-
-  // When def_optional is true, it's OK to not have a "=value" part.
-  if (def_optional && (flag_end[0] == '\0')) {
-    return flag_end;
-  }
-
-  // If def_optional is true and there are more characters after the
-  // flag name, or if def_optional is false, there must be a '=' after
-  // the flag name.
-  if (flag_end[0] != '=') return nullptr;
-
-  // Returns the string after "=".
-  return flag_end + 1;
-}
-
-// Parses a string for a bool flag, in the form of either
-// "--flag=value" or "--flag".
-//
-// In the former case, the value is taken as true as long as it does
-// not start with '0', 'f', or 'F'.
-//
-// In the latter case, the value is taken as true.
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-static bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, true);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Converts the string value to a bool.
-  *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');
-  return true;
-}
-
-// Parses a string for an int32_t flag, in the form of "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseInt32Flag(const char* str, const char* flag, int32_t* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  return ParseInt32(Message() << "The value of flag --" << flag,
-                    value_str, value);
-}
-
-// Parses a string for a string flag, in the form of "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-template <typename String>
-static bool ParseStringFlag(const char* str, const char* flag, String* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  *value = value_str;
-  return true;
-}
-
-// Determines whether a string has a prefix that Google Test uses for its
-// flags, i.e., starts with GTEST_FLAG_PREFIX_ or GTEST_FLAG_PREFIX_DASH_.
-// If Google Test detects that a command line flag has its prefix but is not
-// recognized, it will print its help message. Flags starting with
-// GTEST_INTERNAL_PREFIX_ followed by "internal_" are considered Google Test
-// internal flags and do not trigger the help message.
-static bool HasGoogleTestFlagPrefix(const char* str) {
-  return (SkipPrefix("--", &str) ||
-          SkipPrefix("-", &str) ||
-          SkipPrefix("/", &str)) &&
-         !SkipPrefix(GTEST_FLAG_PREFIX_ "internal_", &str) &&
-         (SkipPrefix(GTEST_FLAG_PREFIX_, &str) ||
-          SkipPrefix(GTEST_FLAG_PREFIX_DASH_, &str));
-}
-
-// Prints a string containing code-encoded text.  The following escape
-// sequences can be used in the string to control the text color:
-//
-//   @@    prints a single '@' character.
-//   @R    changes the color to red.
-//   @G    changes the color to green.
-//   @Y    changes the color to yellow.
-//   @D    changes to the default terminal text color.
-//
-static void PrintColorEncoded(const char* str) {
-  GTestColor color = GTestColor::kDefault;  // The current color.
-
-  // Conceptually, we split the string into segments divided by escape
-  // sequences.  Then we print one segment at a time.  At the end of
-  // each iteration, the str pointer advances to the beginning of the
-  // next segment.
-  for (;;) {
-    const char* p = strchr(str, '@');
-    if (p == nullptr) {
-      ColoredPrintf(color, "%s", str);
-      return;
-    }
-
-    ColoredPrintf(color, "%s", std::string(str, p).c_str());
-
-    const char ch = p[1];
-    str = p + 2;
-    if (ch == '@') {
-      ColoredPrintf(color, "@");
-    } else if (ch == 'D') {
-      color = GTestColor::kDefault;
-    } else if (ch == 'R') {
-      color = GTestColor::kRed;
-    } else if (ch == 'G') {
-      color = GTestColor::kGreen;
-    } else if (ch == 'Y') {
-      color = GTestColor::kYellow;
-    } else {
-      --str;
-    }
-  }
-}
-
-static const char kColorEncodedHelpMessage[] =
-    "This program contains tests written using " GTEST_NAME_
-    ". You can use the\n"
-    "following command line flags to control its behavior:\n"
-    "\n"
-    "Test Selection:\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "list_tests@D\n"
-    "      List the names of all tests instead of running them. The name of\n"
-    "      TEST(Foo, Bar) is \"Foo.Bar\".\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "filter=@YPOSITIVE_PATTERNS"
-    "[@G-@YNEGATIVE_PATTERNS]@D\n"
-    "      Run only the tests whose name matches one of the positive patterns "
-    "but\n"
-    "      none of the negative patterns. '?' matches any single character; "
-    "'*'\n"
-    "      matches any substring; ':' separates two patterns.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "also_run_disabled_tests@D\n"
-    "      Run all disabled tests too.\n"
-    "\n"
-    "Test Execution:\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "repeat=@Y[COUNT]@D\n"
-    "      Run the tests repeatedly; use a negative count to repeat forever.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "shuffle@D\n"
-    "      Randomize tests' orders on every iteration.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "random_seed=@Y[NUMBER]@D\n"
-    "      Random number seed to use for shuffling test orders (between 1 and\n"
-    "      99999, or 0 to use a seed based on the current time).\n"
-    "\n"
-    "Test Output:\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "color=@Y(@Gyes@Y|@Gno@Y|@Gauto@Y)@D\n"
-    "      Enable/disable colored output. The default is @Gauto@D.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "brief=1@D\n"
-    "      Only print test failures.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "print_time=0@D\n"
-    "      Don't print the elapsed time of each test.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "output=@Y(@Gjson@Y|@Gxml@Y)[@G:@YDIRECTORY_PATH@G" GTEST_PATH_SEP_
-    "@Y|@G:@YFILE_PATH]@D\n"
-    "      Generate a JSON or XML report in the given directory or with the "
-    "given\n"
-    "      file name. @YFILE_PATH@D defaults to @Gtest_detail.xml@D.\n"
-# if GTEST_CAN_STREAM_RESULTS_
-    "  @G--" GTEST_FLAG_PREFIX_
-    "stream_result_to=@YHOST@G:@YPORT@D\n"
-    "      Stream test results to the given server.\n"
-# endif  // GTEST_CAN_STREAM_RESULTS_
-    "\n"
-    "Assertion Behavior:\n"
-# if GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
-    "  @G--" GTEST_FLAG_PREFIX_
-    "death_test_style=@Y(@Gfast@Y|@Gthreadsafe@Y)@D\n"
-    "      Set the default death test style.\n"
-# endif  // GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
-    "  @G--" GTEST_FLAG_PREFIX_
-    "break_on_failure@D\n"
-    "      Turn assertion failures into debugger break-points.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "throw_on_failure@D\n"
-    "      Turn assertion failures into C++ exceptions for use by an external\n"
-    "      test framework.\n"
-    "  @G--" GTEST_FLAG_PREFIX_
-    "catch_exceptions=0@D\n"
-    "      Do not report exceptions as test failures. Instead, allow them\n"
-    "      to crash the program or throw a pop-up (on Windows).\n"
-    "\n"
-    "Except for @G--" GTEST_FLAG_PREFIX_
-    "list_tests@D, you can alternatively set "
-    "the corresponding\n"
-    "environment variable of a flag (all letters in upper-case). For example, "
-    "to\n"
-    "disable colored text output, you can either specify "
-    "@G--" GTEST_FLAG_PREFIX_
-    "color=no@D or set\n"
-    "the @G" GTEST_FLAG_PREFIX_UPPER_
-    "COLOR@D environment variable to @Gno@D.\n"
-    "\n"
-    "For more information, please read the " GTEST_NAME_
-    " documentation at\n"
-    "@G" GTEST_PROJECT_URL_ "@D. If you find a bug in " GTEST_NAME_
-    "\n"
-    "(not one in your own code or tests), please report it to\n"
-    "@G<" GTEST_DEV_EMAIL_ ">@D.\n";
-
-static bool ParseGoogleTestFlag(const char* const arg) {
-  return ParseBoolFlag(arg, kAlsoRunDisabledTestsFlag,
-                       &GTEST_FLAG(also_run_disabled_tests)) ||
-         ParseBoolFlag(arg, kBreakOnFailureFlag,
-                       &GTEST_FLAG(break_on_failure)) ||
-         ParseBoolFlag(arg, kCatchExceptionsFlag,
-                       &GTEST_FLAG(catch_exceptions)) ||
-         ParseStringFlag(arg, kColorFlag, &GTEST_FLAG(color)) ||
-         ParseStringFlag(arg, kDeathTestStyleFlag,
-                         &GTEST_FLAG(death_test_style)) ||
-         ParseBoolFlag(arg, kDeathTestUseFork,
-                       &GTEST_FLAG(death_test_use_fork)) ||
-         ParseBoolFlag(arg, kFailFast, &GTEST_FLAG(fail_fast)) ||
-         ParseStringFlag(arg, kFilterFlag, &GTEST_FLAG(filter)) ||
-         ParseStringFlag(arg, kInternalRunDeathTestFlag,
-                         &GTEST_FLAG(internal_run_death_test)) ||
-         ParseBoolFlag(arg, kListTestsFlag, &GTEST_FLAG(list_tests)) ||
-         ParseStringFlag(arg, kOutputFlag, &GTEST_FLAG(output)) ||
-         ParseBoolFlag(arg, kBriefFlag, &GTEST_FLAG(brief)) ||
-         ParseBoolFlag(arg, kPrintTimeFlag, &GTEST_FLAG(print_time)) ||
-         ParseBoolFlag(arg, kPrintUTF8Flag, &GTEST_FLAG(print_utf8)) ||
-         ParseInt32Flag(arg, kRandomSeedFlag, &GTEST_FLAG(random_seed)) ||
-         ParseInt32Flag(arg, kRepeatFlag, &GTEST_FLAG(repeat)) ||
-         ParseBoolFlag(arg, kShuffleFlag, &GTEST_FLAG(shuffle)) ||
-         ParseInt32Flag(arg, kStackTraceDepthFlag,
-                        &GTEST_FLAG(stack_trace_depth)) ||
-         ParseStringFlag(arg, kStreamResultToFlag,
-                         &GTEST_FLAG(stream_result_to)) ||
-         ParseBoolFlag(arg, kThrowOnFailureFlag, &GTEST_FLAG(throw_on_failure));
-}
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-static void LoadFlagsFromFile(const std::string& path) {
-  FILE* flagfile = posix::FOpen(path.c_str(), "r");
-  if (!flagfile) {
-    GTEST_LOG_(FATAL) << "Unable to open file \"" << GTEST_FLAG(flagfile)
-                      << "\"";
-  }
-  std::string contents(ReadEntireFile(flagfile));
-  posix::FClose(flagfile);
-  std::vector<std::string> lines;
-  SplitString(contents, '\n', &lines);
-  for (size_t i = 0; i < lines.size(); ++i) {
-    if (lines[i].empty())
-      continue;
-    if (!ParseGoogleTestFlag(lines[i].c_str()))
-      g_help_flag = true;
-  }
-}
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-// Parses the command line for Google Test flags, without initializing
-// other parts of Google Test.  The type parameter CharType can be
-// instantiated to either char or wchar_t.
-template <typename CharType>
-void ParseGoogleTestFlagsOnlyImpl(int* argc, CharType** argv) {
-  for (int i = 1; i < *argc; i++) {
-    const std::string arg_string = StreamableToString(argv[i]);
-    const char* const arg = arg_string.c_str();
-
-    using internal::ParseBoolFlag;
-    using internal::ParseInt32Flag;
-    using internal::ParseStringFlag;
-
-    bool remove_flag = false;
-    if (ParseGoogleTestFlag(arg)) {
-      remove_flag = true;
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-    } else if (ParseStringFlag(arg, kFlagfileFlag, &GTEST_FLAG(flagfile))) {
-      LoadFlagsFromFile(GTEST_FLAG(flagfile));
-      remove_flag = true;
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-    } else if (arg_string == "--help" || arg_string == "-h" ||
-               arg_string == "-?" || arg_string == "/?" ||
-               HasGoogleTestFlagPrefix(arg)) {
-      // Both help flag and unrecognized Google Test flags (excluding
-      // internal ones) trigger help display.
-      g_help_flag = true;
-    }
-
-    if (remove_flag) {
-      // Shift the remainder of the argv list left by one.  Note
-      // that argv has (*argc + 1) elements, the last one always being
-      // NULL.  The following loop moves the trailing NULL element as
-      // well.
-      for (int j = i; j != *argc; j++) {
-        argv[j] = argv[j + 1];
-      }
-
-      // Decrements the argument count.
-      (*argc)--;
-
-      // We also need to decrement the iterator as we just removed
-      // an element.
-      i--;
-    }
-  }
-
-  if (g_help_flag) {
-    // We print the help here instead of in RUN_ALL_TESTS(), as the
-    // latter may not be called at all if the user is using Google
-    // Test with another testing framework.
-    PrintColorEncoded(kColorEncodedHelpMessage);
-  }
-}
-
-// Parses the command line for Google Test flags, without initializing
-// other parts of Google Test.
-void ParseGoogleTestFlagsOnly(int* argc, char** argv) {
-  ParseGoogleTestFlagsOnlyImpl(argc, argv);
-
-  // Fix the value of *_NSGetArgc() on macOS, but if and only if
-  // *_NSGetArgv() == argv
-  // Only applicable to char** version of argv
-#if GTEST_OS_MAC
-#ifndef GTEST_OS_IOS
-  if (*_NSGetArgv() == argv) {
-    *_NSGetArgc() = *argc;
-  }
-#endif
-#endif
-}
-void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv) {
-  ParseGoogleTestFlagsOnlyImpl(argc, argv);
-}
-
-// The internal implementation of InitGoogleTest().
-//
-// The type parameter CharType can be instantiated to either char or
-// wchar_t.
-template <typename CharType>
-void InitGoogleTestImpl(int* argc, CharType** argv) {
-  // We don't want to run the initialization code twice.
-  if (GTestIsInitialized()) return;
-
-  if (*argc <= 0) return;
-
-  g_argvs.clear();
-  for (int i = 0; i != *argc; i++) {
-    g_argvs.push_back(StreamableToString(argv[i]));
-  }
-
-#if GTEST_HAS_ABSL
-  absl::InitializeSymbolizer(g_argvs[0].c_str());
-#endif  // GTEST_HAS_ABSL
-
-  ParseGoogleTestFlagsOnly(argc, argv);
-  GetUnitTestImpl()->PostFlagParsingInit();
-}
-
-}  // namespace internal
-
-// Initializes Google Test.  This must be called before calling
-// RUN_ALL_TESTS().  In particular, it parses a command line for the
-// flags that Google Test recognizes.  Whenever a Google Test flag is
-// seen, it is removed from argv, and *argc is decremented.
-//
-// No value is returned.  Instead, the Google Test flag variables are
-// updated.
-//
-// Calling the function for the second time has no user-visible effect.
-void InitGoogleTest(int* argc, char** argv) {
-#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
-#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  internal::InitGoogleTestImpl(argc, argv);
-#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-}
-
-// This overloaded version can be used in Windows programs compiled in
-// UNICODE mode.
-void InitGoogleTest(int* argc, wchar_t** argv) {
-#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
-#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  internal::InitGoogleTestImpl(argc, argv);
-#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-}
-
-// This overloaded version can be used on Arduino/embedded platforms where
-// there is no argc/argv.
-void InitGoogleTest() {
-  // Since Arduino doesn't have a command line, fake out the argc/argv arguments
-  int argc = 1;
-  const auto arg0 = "dummy";
-  char* argv0 = const_cast<char*>(arg0);
-  char** argv = &argv0;
-
-#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(&argc, argv);
-#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  internal::InitGoogleTestImpl(&argc, argv);
-#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-}
-
-std::string TempDir() {
-#if defined(GTEST_CUSTOM_TEMPDIR_FUNCTION_)
-  return GTEST_CUSTOM_TEMPDIR_FUNCTION_();
-#elif GTEST_OS_WINDOWS_MOBILE
-  return "\\temp\\";
-#elif GTEST_OS_WINDOWS
-  const char* temp_dir = internal::posix::GetEnv("TEMP");
-  if (temp_dir == nullptr || temp_dir[0] == '\0') {
-    return "\\temp\\";
-  } else if (temp_dir[strlen(temp_dir) - 1] == '\\') {
-    return temp_dir;
-  } else {
-    return std::string(temp_dir) + "\\";
-  }
-#elif GTEST_OS_LINUX_ANDROID
-  const char* temp_dir = internal::posix::GetEnv("TEST_TMPDIR");
-  if (temp_dir == nullptr || temp_dir[0] == '\0') {
-    return "/data/local/tmp/";
-  } else {
-    return temp_dir;
-  }
-#elif GTEST_OS_LINUX
-  const char* temp_dir = internal::posix::GetEnv("TEST_TMPDIR");
-  if (temp_dir == nullptr || temp_dir[0] == '\0') {
-    return "/tmp/";
-  } else {
-    return temp_dir;
-  }
-#else
-  return "/tmp/";
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-// Class ScopedTrace
-
-// Pushes the given source file location and message onto a per-thread
-// trace stack maintained by Google Test.
-void ScopedTrace::PushTrace(const char* file, int line, std::string message) {
-  internal::TraceInfo trace;
-  trace.file = file;
-  trace.line = line;
-  trace.message.swap(message);
-
-  UnitTest::GetInstance()->PushGTestTrace(trace);
-}
-
-// Pops the info pushed by the c'tor.
-ScopedTrace::~ScopedTrace()
-    GTEST_LOCK_EXCLUDED_(&UnitTest::mutex_) {
-  UnitTest::GetInstance()->PopGTestTrace();
-}
-
-}  // namespace testing
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// This file implements death tests.
-
-
-#include <functional>
-#include <utility>
-
-
-#if GTEST_HAS_DEATH_TEST
-
-# if GTEST_OS_MAC
-#  include <crt_externs.h>
-# endif  // GTEST_OS_MAC
-
-# include <errno.h>
-# include <fcntl.h>
-# include <limits.h>
-
-# if GTEST_OS_LINUX
-#  include <signal.h>
-# endif  // GTEST_OS_LINUX
-
-# include <stdarg.h>
-
-# if GTEST_OS_WINDOWS
-#  include <windows.h>
-# else
-#  include <sys/mman.h>
-#  include <sys/wait.h>
-# endif  // GTEST_OS_WINDOWS
-
-# if GTEST_OS_QNX
-#  include <spawn.h>
-# endif  // GTEST_OS_QNX
-
-# if GTEST_OS_FUCHSIA
-#  include <lib/fdio/fd.h>
-#  include <lib/fdio/io.h>
-#  include <lib/fdio/spawn.h>
-#  include <lib/zx/channel.h>
-#  include <lib/zx/port.h>
-#  include <lib/zx/process.h>
-#  include <lib/zx/socket.h>
-#  include <zircon/processargs.h>
-#  include <zircon/syscalls.h>
-#  include <zircon/syscalls/policy.h>
-#  include <zircon/syscalls/port.h>
-# endif  // GTEST_OS_FUCHSIA
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-
-namespace testing {
-
-// Constants.
-
-// The default death test style.
-//
-// This is defined in internal/gtest-port.h as "fast", but can be overridden by
-// a definition in internal/custom/gtest-port.h. The recommended value, which is
-// used internally at Google, is "threadsafe".
-static const char kDefaultDeathTestStyle[] = GTEST_DEFAULT_DEATH_TEST_STYLE;
-
-GTEST_DEFINE_string_(
-    death_test_style,
-    internal::StringFromGTestEnv("death_test_style", kDefaultDeathTestStyle),
-    "Indicates how to run a death test in a forked child process: "
-    "\"threadsafe\" (child process re-executes the test binary "
-    "from the beginning, running only the specific death test) or "
-    "\"fast\" (child process runs the death test immediately "
-    "after forking).");
-
-GTEST_DEFINE_bool_(
-    death_test_use_fork,
-    internal::BoolFromGTestEnv("death_test_use_fork", false),
-    "Instructs to use fork()/_exit() instead of clone() in death tests. "
-    "Ignored and always uses fork() on POSIX systems where clone() is not "
-    "implemented. Useful when running under valgrind or similar tools if "
-    "those do not support clone(). Valgrind 3.3.1 will just fail if "
-    "it sees an unsupported combination of clone() flags. "
-    "It is not recommended to use this flag w/o valgrind though it will "
-    "work in 99% of the cases. Once valgrind is fixed, this flag will "
-    "most likely be removed.");
-
-namespace internal {
-GTEST_DEFINE_string_(
-    internal_run_death_test, "",
-    "Indicates the file, line number, temporal index of "
-    "the single death test to run, and a file descriptor to "
-    "which a success code may be sent, all separated by "
-    "the '|' characters.  This flag is specified if and only if the "
-    "current process is a sub-process launched for running a thread-safe "
-    "death test.  FOR INTERNAL USE ONLY.");
-}  // namespace internal
-
-#if GTEST_HAS_DEATH_TEST
-
-namespace internal {
-
-// Valid only for fast death tests. Indicates the code is running in the
-// child process of a fast style death test.
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-static bool g_in_fast_death_test_child = false;
-# endif
-
-// Returns a Boolean value indicating whether the caller is currently
-// executing in the context of the death test child process.  Tools such as
-// Valgrind heap checkers may need this to modify their behavior in death
-// tests.  IMPORTANT: This is an internal utility.  Using it may break the
-// implementation of death tests.  User code MUST NOT use it.
-bool InDeathTestChild() {
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  // On Windows and Fuchsia, death tests are thread-safe regardless of the value
-  // of the death_test_style flag.
-  return !GTEST_FLAG(internal_run_death_test).empty();
-
-# else
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe")
-    return !GTEST_FLAG(internal_run_death_test).empty();
-  else
-    return g_in_fast_death_test_child;
-#endif
-}
-
-}  // namespace internal
-
-// ExitedWithCode constructor.
-ExitedWithCode::ExitedWithCode(int exit_code) : exit_code_(exit_code) {
-}
-
-// ExitedWithCode function-call operator.
-bool ExitedWithCode::operator()(int exit_status) const {
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  return exit_status == exit_code_;
-
-# else
-
-  return WIFEXITED(exit_status) && WEXITSTATUS(exit_status) == exit_code_;
-
-# endif  // GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-}
-
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-// KilledBySignal constructor.
-KilledBySignal::KilledBySignal(int signum) : signum_(signum) {
-}
-
-// KilledBySignal function-call operator.
-bool KilledBySignal::operator()(int exit_status) const {
-#  if defined(GTEST_KILLED_BY_SIGNAL_OVERRIDE_)
-  {
-    bool result;
-    if (GTEST_KILLED_BY_SIGNAL_OVERRIDE_(signum_, exit_status, &result)) {
-      return result;
-    }
-  }
-#  endif  // defined(GTEST_KILLED_BY_SIGNAL_OVERRIDE_)
-  return WIFSIGNALED(exit_status) && WTERMSIG(exit_status) == signum_;
-}
-# endif  // !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-
-namespace internal {
-
-// Utilities needed for death tests.
-
-// Generates a textual description of a given exit code, in the format
-// specified by wait(2).
-static std::string ExitSummary(int exit_code) {
-  Message m;
-
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  m << "Exited with exit status " << exit_code;
-
-# else
-
-  if (WIFEXITED(exit_code)) {
-    m << "Exited with exit status " << WEXITSTATUS(exit_code);
-  } else if (WIFSIGNALED(exit_code)) {
-    m << "Terminated by signal " << WTERMSIG(exit_code);
-  }
-#  ifdef WCOREDUMP
-  if (WCOREDUMP(exit_code)) {
-    m << " (core dumped)";
-  }
-#  endif
-# endif  // GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  return m.GetString();
-}
-
-// Returns true if exit_status describes a process that was terminated
-// by a signal, or exited normally with a nonzero exit code.
-bool ExitedUnsuccessfully(int exit_status) {
-  return !ExitedWithCode(0)(exit_status);
-}
-
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-// Generates a textual failure message when a death test finds more than
-// one thread running, or cannot determine the number of threads, prior
-// to executing the given statement.  It is the responsibility of the
-// caller not to pass a thread_count of 1.
-static std::string DeathTestThreadWarning(size_t thread_count) {
-  Message msg;
-  msg << "Death tests use fork(), which is unsafe particularly"
-      << " in a threaded context. For this test, " << GTEST_NAME_ << " ";
-  if (thread_count == 0) {
-    msg << "couldn't detect the number of threads.";
-  } else {
-    msg << "detected " << thread_count << " threads.";
-  }
-  msg << " See "
-         "https://github.com/google/googletest/blob/master/docs/"
-         "advanced.md#death-tests-and-threads"
-      << " for more explanation and suggested solutions, especially if"
-      << " this is the last message you see before your test times out.";
-  return msg.GetString();
-}
-# endif  // !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-
-// Flag characters for reporting a death test that did not die.
-static const char kDeathTestLived = 'L';
-static const char kDeathTestReturned = 'R';
-static const char kDeathTestThrew = 'T';
-static const char kDeathTestInternalError = 'I';
-
-#if GTEST_OS_FUCHSIA
-
-// File descriptor used for the pipe in the child process.
-static const int kFuchsiaReadPipeFd = 3;
-
-#endif
-
-// An enumeration describing all of the possible ways that a death test can
-// conclude.  DIED means that the process died while executing the test
-// code; LIVED means that process lived beyond the end of the test code;
-// RETURNED means that the test statement attempted to execute a return
-// statement, which is not allowed; THREW means that the test statement
-// returned control by throwing an exception.  IN_PROGRESS means the test
-// has not yet concluded.
-enum DeathTestOutcome { IN_PROGRESS, DIED, LIVED, RETURNED, THREW };
-
-// Routine for aborting the program which is safe to call from an
-// exec-style death test child process, in which case the error
-// message is propagated back to the parent process.  Otherwise, the
-// message is simply printed to stderr.  In either case, the program
-// then exits with status 1.
-static void DeathTestAbort(const std::string& message) {
-  // On a POSIX system, this function may be called from a threadsafe-style
-  // death test child process, which operates on a very small stack.  Use
-  // the heap for any additional non-minuscule memory requirements.
-  const InternalRunDeathTestFlag* const flag =
-      GetUnitTestImpl()->internal_run_death_test_flag();
-  if (flag != nullptr) {
-    FILE* parent = posix::FDOpen(flag->write_fd(), "w");
-    fputc(kDeathTestInternalError, parent);
-    fprintf(parent, "%s", message.c_str());
-    fflush(parent);
-    _exit(1);
-  } else {
-    fprintf(stderr, "%s", message.c_str());
-    fflush(stderr);
-    posix::Abort();
-  }
-}
-
-// A replacement for CHECK that calls DeathTestAbort if the assertion
-// fails.
-# define GTEST_DEATH_TEST_CHECK_(expression) \
-  do { \
-    if (!::testing::internal::IsTrue(expression)) { \
-      DeathTestAbort( \
-          ::std::string("CHECK failed: File ") + __FILE__ +  ", line " \
-          + ::testing::internal::StreamableToString(__LINE__) + ": " \
-          + #expression); \
-    } \
-  } while (::testing::internal::AlwaysFalse())
-
-// This macro is similar to GTEST_DEATH_TEST_CHECK_, but it is meant for
-// evaluating any system call that fulfills two conditions: it must return
-// -1 on failure, and set errno to EINTR when it is interrupted and
-// should be tried again.  The macro expands to a loop that repeatedly
-// evaluates the expression as long as it evaluates to -1 and sets
-// errno to EINTR.  If the expression evaluates to -1 but errno is
-// something other than EINTR, DeathTestAbort is called.
-# define GTEST_DEATH_TEST_CHECK_SYSCALL_(expression) \
-  do { \
-    int gtest_retval; \
-    do { \
-      gtest_retval = (expression); \
-    } while (gtest_retval == -1 && errno == EINTR); \
-    if (gtest_retval == -1) { \
-      DeathTestAbort( \
-          ::std::string("CHECK failed: File ") + __FILE__ + ", line " \
-          + ::testing::internal::StreamableToString(__LINE__) + ": " \
-          + #expression + " != -1"); \
-    } \
-  } while (::testing::internal::AlwaysFalse())
-
-// Returns the message describing the last system error in errno.
-std::string GetLastErrnoDescription() {
-    return errno == 0 ? "" : posix::StrError(errno);
-}
-
-// This is called from a death test parent process to read a failure
-// message from the death test child process and log it with the FATAL
-// severity. On Windows, the message is read from a pipe handle. On other
-// platforms, it is read from a file descriptor.
-static void FailFromInternalError(int fd) {
-  Message error;
-  char buffer[256];
-  int num_read;
-
-  do {
-    while ((num_read = posix::Read(fd, buffer, 255)) > 0) {
-      buffer[num_read] = '\0';
-      error << buffer;
-    }
-  } while (num_read == -1 && errno == EINTR);
-
-  if (num_read == 0) {
-    GTEST_LOG_(FATAL) << error.GetString();
-  } else {
-    const int last_error = errno;
-    GTEST_LOG_(FATAL) << "Error while reading death test internal: "
-                      << GetLastErrnoDescription() << " [" << last_error << "]";
-  }
-}
-
-// Death test constructor.  Increments the running death test count
-// for the current test.
-DeathTest::DeathTest() {
-  TestInfo* const info = GetUnitTestImpl()->current_test_info();
-  if (info == nullptr) {
-    DeathTestAbort("Cannot run a death test outside of a TEST or "
-                   "TEST_F construct");
-  }
-}
-
-// Creates and returns a death test by dispatching to the current
-// death test factory.
-bool DeathTest::Create(const char* statement,
-                       Matcher<const std::string&> matcher, const char* file,
-                       int line, DeathTest** test) {
-  return GetUnitTestImpl()->death_test_factory()->Create(
-      statement, std::move(matcher), file, line, test);
-}
-
-const char* DeathTest::LastMessage() {
-  return last_death_test_message_.c_str();
-}
-
-void DeathTest::set_last_death_test_message(const std::string& message) {
-  last_death_test_message_ = message;
-}
-
-std::string DeathTest::last_death_test_message_;
-
-// Provides cross platform implementation for some death functionality.
-class DeathTestImpl : public DeathTest {
- protected:
-  DeathTestImpl(const char* a_statement, Matcher<const std::string&> matcher)
-      : statement_(a_statement),
-        matcher_(std::move(matcher)),
-        spawned_(false),
-        status_(-1),
-        outcome_(IN_PROGRESS),
-        read_fd_(-1),
-        write_fd_(-1) {}
-
-  // read_fd_ is expected to be closed and cleared by a derived class.
-  ~DeathTestImpl() override { GTEST_DEATH_TEST_CHECK_(read_fd_ == -1); }
-
-  void Abort(AbortReason reason) override;
-  bool Passed(bool status_ok) override;
-
-  const char* statement() const { return statement_; }
-  bool spawned() const { return spawned_; }
-  void set_spawned(bool is_spawned) { spawned_ = is_spawned; }
-  int status() const { return status_; }
-  void set_status(int a_status) { status_ = a_status; }
-  DeathTestOutcome outcome() const { return outcome_; }
-  void set_outcome(DeathTestOutcome an_outcome) { outcome_ = an_outcome; }
-  int read_fd() const { return read_fd_; }
-  void set_read_fd(int fd) { read_fd_ = fd; }
-  int write_fd() const { return write_fd_; }
-  void set_write_fd(int fd) { write_fd_ = fd; }
-
-  // Called in the parent process only. Reads the result code of the death
-  // test child process via a pipe, interprets it to set the outcome_
-  // member, and closes read_fd_.  Outputs diagnostics and terminates in
-  // case of unexpected codes.
-  void ReadAndInterpretStatusByte();
-
-  // Returns stderr output from the child process.
-  virtual std::string GetErrorLogs();
-
- private:
-  // The textual content of the code this object is testing.  This class
-  // doesn't own this string and should not attempt to delete it.
-  const char* const statement_;
-  // A matcher that's expected to match the stderr output by the child process.
-  Matcher<const std::string&> matcher_;
-  // True if the death test child process has been successfully spawned.
-  bool spawned_;
-  // The exit status of the child process.
-  int status_;
-  // How the death test concluded.
-  DeathTestOutcome outcome_;
-  // Descriptor to the read end of the pipe to the child process.  It is
-  // always -1 in the child process.  The child keeps its write end of the
-  // pipe in write_fd_.
-  int read_fd_;
-  // Descriptor to the child's write end of the pipe to the parent process.
-  // It is always -1 in the parent process.  The parent keeps its end of the
-  // pipe in read_fd_.
-  int write_fd_;
-};
-
-// Called in the parent process only. Reads the result code of the death
-// test child process via a pipe, interprets it to set the outcome_
-// member, and closes read_fd_.  Outputs diagnostics and terminates in
-// case of unexpected codes.
-void DeathTestImpl::ReadAndInterpretStatusByte() {
-  char flag;
-  int bytes_read;
-
-  // The read() here blocks until data is available (signifying the
-  // failure of the death test) or until the pipe is closed (signifying
-  // its success), so it's okay to call this in the parent before
-  // the child process has exited.
-  do {
-    bytes_read = posix::Read(read_fd(), &flag, 1);
-  } while (bytes_read == -1 && errno == EINTR);
-
-  if (bytes_read == 0) {
-    set_outcome(DIED);
-  } else if (bytes_read == 1) {
-    switch (flag) {
-      case kDeathTestReturned:
-        set_outcome(RETURNED);
-        break;
-      case kDeathTestThrew:
-        set_outcome(THREW);
-        break;
-      case kDeathTestLived:
-        set_outcome(LIVED);
-        break;
-      case kDeathTestInternalError:
-        FailFromInternalError(read_fd());  // Does not return.
-        break;
-      default:
-        GTEST_LOG_(FATAL) << "Death test child process reported "
-                          << "unexpected status byte ("
-                          << static_cast<unsigned int>(flag) << ")";
-    }
-  } else {
-    GTEST_LOG_(FATAL) << "Read from death test child process failed: "
-                      << GetLastErrnoDescription();
-  }
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Close(read_fd()));
-  set_read_fd(-1);
-}
-
-std::string DeathTestImpl::GetErrorLogs() {
-  return GetCapturedStderr();
-}
-
-// Signals that the death test code which should have exited, didn't.
-// Should be called only in a death test child process.
-// Writes a status byte to the child's status file descriptor, then
-// calls _exit(1).
-void DeathTestImpl::Abort(AbortReason reason) {
-  // The parent process considers the death test to be a failure if
-  // it finds any data in our pipe.  So, here we write a single flag byte
-  // to the pipe, then exit.
-  const char status_ch =
-      reason == TEST_DID_NOT_DIE ? kDeathTestLived :
-      reason == TEST_THREW_EXCEPTION ? kDeathTestThrew : kDeathTestReturned;
-
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Write(write_fd(), &status_ch, 1));
-  // We are leaking the descriptor here because on some platforms (i.e.,
-  // when built as Windows DLL), destructors of global objects will still
-  // run after calling _exit(). On such systems, write_fd_ will be
-  // indirectly closed from the destructor of UnitTestImpl, causing double
-  // close if it is also closed here. On debug configurations, double close
-  // may assert. As there are no in-process buffers to flush here, we are
-  // relying on the OS to close the descriptor after the process terminates
-  // when the destructors are not run.
-  _exit(1);  // Exits w/o any normal exit hooks (we were supposed to crash)
-}
-
-// Returns an indented copy of stderr output for a death test.
-// This makes distinguishing death test output lines from regular log lines
-// much easier.
-static ::std::string FormatDeathTestOutput(const ::std::string& output) {
-  ::std::string ret;
-  for (size_t at = 0; ; ) {
-    const size_t line_end = output.find('\n', at);
-    ret += "[  DEATH   ] ";
-    if (line_end == ::std::string::npos) {
-      ret += output.substr(at);
-      break;
-    }
-    ret += output.substr(at, line_end + 1 - at);
-    at = line_end + 1;
-  }
-  return ret;
-}
-
-// Assesses the success or failure of a death test, using both private
-// members which have previously been set, and one argument:
-//
-// Private data members:
-//   outcome:  An enumeration describing how the death test
-//             concluded: DIED, LIVED, THREW, or RETURNED.  The death test
-//             fails in the latter three cases.
-//   status:   The exit status of the child process. On *nix, it is in the
-//             in the format specified by wait(2). On Windows, this is the
-//             value supplied to the ExitProcess() API or a numeric code
-//             of the exception that terminated the program.
-//   matcher_: A matcher that's expected to match the stderr output by the child
-//             process.
-//
-// Argument:
-//   status_ok: true if exit_status is acceptable in the context of
-//              this particular death test, which fails if it is false
-//
-// Returns true if and only if all of the above conditions are met.  Otherwise,
-// the first failing condition, in the order given above, is the one that is
-// reported. Also sets the last death test message string.
-bool DeathTestImpl::Passed(bool status_ok) {
-  if (!spawned())
-    return false;
-
-  const std::string error_message = GetErrorLogs();
-
-  bool success = false;
-  Message buffer;
-
-  buffer << "Death test: " << statement() << "\n";
-  switch (outcome()) {
-    case LIVED:
-      buffer << "    Result: failed to die.\n"
-             << " Error msg:\n" << FormatDeathTestOutput(error_message);
-      break;
-    case THREW:
-      buffer << "    Result: threw an exception.\n"
-             << " Error msg:\n" << FormatDeathTestOutput(error_message);
-      break;
-    case RETURNED:
-      buffer << "    Result: illegal return in test statement.\n"
-             << " Error msg:\n" << FormatDeathTestOutput(error_message);
-      break;
-    case DIED:
-      if (status_ok) {
-        if (matcher_.Matches(error_message)) {
-          success = true;
-        } else {
-          std::ostringstream stream;
-          matcher_.DescribeTo(&stream);
-          buffer << "    Result: died but not with expected error.\n"
-                 << "  Expected: " << stream.str() << "\n"
-                 << "Actual msg:\n"
-                 << FormatDeathTestOutput(error_message);
-        }
-      } else {
-        buffer << "    Result: died but not with expected exit code:\n"
-               << "            " << ExitSummary(status()) << "\n"
-               << "Actual msg:\n" << FormatDeathTestOutput(error_message);
-      }
-      break;
-    case IN_PROGRESS:
-    default:
-      GTEST_LOG_(FATAL)
-          << "DeathTest::Passed somehow called before conclusion of test";
-  }
-
-  DeathTest::set_last_death_test_message(buffer.GetString());
-  return success;
-}
-
-# if GTEST_OS_WINDOWS
-// WindowsDeathTest implements death tests on Windows. Due to the
-// specifics of starting new processes on Windows, death tests there are
-// always threadsafe, and Google Test considers the
-// --gtest_death_test_style=fast setting to be equivalent to
-// --gtest_death_test_style=threadsafe there.
-//
-// A few implementation notes:  Like the Linux version, the Windows
-// implementation uses pipes for child-to-parent communication. But due to
-// the specifics of pipes on Windows, some extra steps are required:
-//
-// 1. The parent creates a communication pipe and stores handles to both
-//    ends of it.
-// 2. The parent starts the child and provides it with the information
-//    necessary to acquire the handle to the write end of the pipe.
-// 3. The child acquires the write end of the pipe and signals the parent
-//    using a Windows event.
-// 4. Now the parent can release the write end of the pipe on its side. If
-//    this is done before step 3, the object's reference count goes down to
-//    0 and it is destroyed, preventing the child from acquiring it. The
-//    parent now has to release it, or read operations on the read end of
-//    the pipe will not return when the child terminates.
-// 5. The parent reads child's output through the pipe (outcome code and
-//    any possible error messages) from the pipe, and its stderr and then
-//    determines whether to fail the test.
-//
-// Note: to distinguish Win32 API calls from the local method and function
-// calls, the former are explicitly resolved in the global namespace.
-//
-class WindowsDeathTest : public DeathTestImpl {
- public:
-  WindowsDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
-                   const char* file, int line)
-      : DeathTestImpl(a_statement, std::move(matcher)),
-        file_(file),
-        line_(line) {}
-
-  // All of these virtual functions are inherited from DeathTest.
-  virtual int Wait();
-  virtual TestRole AssumeRole();
-
- private:
-  // The name of the file in which the death test is located.
-  const char* const file_;
-  // The line number on which the death test is located.
-  const int line_;
-  // Handle to the write end of the pipe to the child process.
-  AutoHandle write_handle_;
-  // Child process handle.
-  AutoHandle child_handle_;
-  // Event the child process uses to signal the parent that it has
-  // acquired the handle to the write end of the pipe. After seeing this
-  // event the parent can release its own handles to make sure its
-  // ReadFile() calls return when the child terminates.
-  AutoHandle event_handle_;
-};
-
-// Waits for the child in a death test to exit, returning its exit
-// status, or 0 if no child process exists.  As a side effect, sets the
-// outcome data member.
-int WindowsDeathTest::Wait() {
-  if (!spawned())
-    return 0;
-
-  // Wait until the child either signals that it has acquired the write end
-  // of the pipe or it dies.
-  const HANDLE wait_handles[2] = { child_handle_.Get(), event_handle_.Get() };
-  switch (::WaitForMultipleObjects(2,
-                                   wait_handles,
-                                   FALSE,  // Waits for any of the handles.
-                                   INFINITE)) {
-    case WAIT_OBJECT_0:
-    case WAIT_OBJECT_0 + 1:
-      break;
-    default:
-      GTEST_DEATH_TEST_CHECK_(false);  // Should not get here.
-  }
-
-  // The child has acquired the write end of the pipe or exited.
-  // We release the handle on our side and continue.
-  write_handle_.Reset();
-  event_handle_.Reset();
-
-  ReadAndInterpretStatusByte();
-
-  // Waits for the child process to exit if it haven't already. This
-  // returns immediately if the child has already exited, regardless of
-  // whether previous calls to WaitForMultipleObjects synchronized on this
-  // handle or not.
-  GTEST_DEATH_TEST_CHECK_(
-      WAIT_OBJECT_0 == ::WaitForSingleObject(child_handle_.Get(),
-                                             INFINITE));
-  DWORD status_code;
-  GTEST_DEATH_TEST_CHECK_(
-      ::GetExitCodeProcess(child_handle_.Get(), &status_code) != FALSE);
-  child_handle_.Reset();
-  set_status(static_cast<int>(status_code));
-  return status();
-}
-
-// The AssumeRole process for a Windows death test.  It creates a child
-// process with the same executable as the current process to run the
-// death test.  The child process is given the --gtest_filter and
-// --gtest_internal_run_death_test flags such that it knows to run the
-// current death test only.
-DeathTest::TestRole WindowsDeathTest::AssumeRole() {
-  const UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const TestInfo* const info = impl->current_test_info();
-  const int death_test_index = info->result()->death_test_count();
-
-  if (flag != nullptr) {
-    // ParseInternalRunDeathTestFlag() has performed all the necessary
-    // processing.
-    set_write_fd(flag->write_fd());
-    return EXECUTE_TEST;
-  }
-
-  // WindowsDeathTest uses an anonymous pipe to communicate results of
-  // a death test.
-  SECURITY_ATTRIBUTES handles_are_inheritable = {sizeof(SECURITY_ATTRIBUTES),
-                                                 nullptr, TRUE};
-  HANDLE read_handle, write_handle;
-  GTEST_DEATH_TEST_CHECK_(
-      ::CreatePipe(&read_handle, &write_handle, &handles_are_inheritable,
-                   0)  // Default buffer size.
-      != FALSE);
-  set_read_fd(::_open_osfhandle(reinterpret_cast<intptr_t>(read_handle),
-                                O_RDONLY));
-  write_handle_.Reset(write_handle);
-  event_handle_.Reset(::CreateEvent(
-      &handles_are_inheritable,
-      TRUE,       // The event will automatically reset to non-signaled state.
-      FALSE,      // The initial state is non-signalled.
-      nullptr));  // The even is unnamed.
-  GTEST_DEATH_TEST_CHECK_(event_handle_.Get() != nullptr);
-  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
-                                  kFilterFlag + "=" + info->test_suite_name() +
-                                  "." + info->name();
-  const std::string internal_flag =
-      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag +
-      "=" + file_ + "|" + StreamableToString(line_) + "|" +
-      StreamableToString(death_test_index) + "|" +
-      StreamableToString(static_cast<unsigned int>(::GetCurrentProcessId())) +
-      // size_t has the same width as pointers on both 32-bit and 64-bit
-      // Windows platforms.
-      // See http://msdn.microsoft.com/en-us/library/tcxf1dw6.aspx.
-      "|" + StreamableToString(reinterpret_cast<size_t>(write_handle)) +
-      "|" + StreamableToString(reinterpret_cast<size_t>(event_handle_.Get()));
-
-  char executable_path[_MAX_PATH + 1];  // NOLINT
-  GTEST_DEATH_TEST_CHECK_(_MAX_PATH + 1 != ::GetModuleFileNameA(nullptr,
-                                                                executable_path,
-                                                                _MAX_PATH));
-
-  std::string command_line =
-      std::string(::GetCommandLineA()) + " " + filter_flag + " \"" +
-      internal_flag + "\"";
-
-  DeathTest::set_last_death_test_message("");
-
-  CaptureStderr();
-  // Flush the log buffers since the log streams are shared with the child.
-  FlushInfoLog();
-
-  // The child process will share the standard handles with the parent.
-  STARTUPINFOA startup_info;
-  memset(&startup_info, 0, sizeof(STARTUPINFO));
-  startup_info.dwFlags = STARTF_USESTDHANDLES;
-  startup_info.hStdInput = ::GetStdHandle(STD_INPUT_HANDLE);
-  startup_info.hStdOutput = ::GetStdHandle(STD_OUTPUT_HANDLE);
-  startup_info.hStdError = ::GetStdHandle(STD_ERROR_HANDLE);
-
-  PROCESS_INFORMATION process_info;
-  GTEST_DEATH_TEST_CHECK_(
-      ::CreateProcessA(
-          executable_path, const_cast<char*>(command_line.c_str()),
-          nullptr,  // Retuned process handle is not inheritable.
-          nullptr,  // Retuned thread handle is not inheritable.
-          TRUE,  // Child inherits all inheritable handles (for write_handle_).
-          0x0,   // Default creation flags.
-          nullptr,  // Inherit the parent's environment.
-          UnitTest::GetInstance()->original_working_dir(), &startup_info,
-          &process_info) != FALSE);
-  child_handle_.Reset(process_info.hProcess);
-  ::CloseHandle(process_info.hThread);
-  set_spawned(true);
-  return OVERSEE_TEST;
-}
-
-# elif GTEST_OS_FUCHSIA
-
-class FuchsiaDeathTest : public DeathTestImpl {
- public:
-  FuchsiaDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
-                   const char* file, int line)
-      : DeathTestImpl(a_statement, std::move(matcher)),
-        file_(file),
-        line_(line) {}
-
-  // All of these virtual functions are inherited from DeathTest.
-  int Wait() override;
-  TestRole AssumeRole() override;
-  std::string GetErrorLogs() override;
-
- private:
-  // The name of the file in which the death test is located.
-  const char* const file_;
-  // The line number on which the death test is located.
-  const int line_;
-  // The stderr data captured by the child process.
-  std::string captured_stderr_;
-
-  zx::process child_process_;
-  zx::channel exception_channel_;
-  zx::socket stderr_socket_;
-};
-
-// Utility class for accumulating command-line arguments.
-class Arguments {
- public:
-  Arguments() { args_.push_back(nullptr); }
-
-  ~Arguments() {
-    for (std::vector<char*>::iterator i = args_.begin(); i != args_.end();
-         ++i) {
-      free(*i);
-    }
-  }
-  void AddArgument(const char* argument) {
-    args_.insert(args_.end() - 1, posix::StrDup(argument));
-  }
-
-  template <typename Str>
-  void AddArguments(const ::std::vector<Str>& arguments) {
-    for (typename ::std::vector<Str>::const_iterator i = arguments.begin();
-         i != arguments.end();
-         ++i) {
-      args_.insert(args_.end() - 1, posix::StrDup(i->c_str()));
-    }
-  }
-  char* const* Argv() {
-    return &args_[0];
-  }
-
-  int size() {
-    return static_cast<int>(args_.size()) - 1;
-  }
-
- private:
-  std::vector<char*> args_;
-};
-
-// Waits for the child in a death test to exit, returning its exit
-// status, or 0 if no child process exists.  As a side effect, sets the
-// outcome data member.
-int FuchsiaDeathTest::Wait() {
-  const int kProcessKey = 0;
-  const int kSocketKey = 1;
-  const int kExceptionKey = 2;
-
-  if (!spawned())
-    return 0;
-
-  // Create a port to wait for socket/task/exception events.
-  zx_status_t status_zx;
-  zx::port port;
-  status_zx = zx::port::create(0, &port);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  // Register to wait for the child process to terminate.
-  status_zx = child_process_.wait_async(
-      port, kProcessKey, ZX_PROCESS_TERMINATED, 0);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  // Register to wait for the socket to be readable or closed.
-  status_zx = stderr_socket_.wait_async(
-      port, kSocketKey, ZX_SOCKET_READABLE | ZX_SOCKET_PEER_CLOSED, 0);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  // Register to wait for an exception.
-  status_zx = exception_channel_.wait_async(
-      port, kExceptionKey, ZX_CHANNEL_READABLE, 0);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  bool process_terminated = false;
-  bool socket_closed = false;
-  do {
-    zx_port_packet_t packet = {};
-    status_zx = port.wait(zx::time::infinite(), &packet);
-    GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-    if (packet.key == kExceptionKey) {
-      // Process encountered an exception. Kill it directly rather than
-      // letting other handlers process the event. We will get a kProcessKey
-      // event when the process actually terminates.
-      status_zx = child_process_.kill();
-      GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-    } else if (packet.key == kProcessKey) {
-      // Process terminated.
-      GTEST_DEATH_TEST_CHECK_(ZX_PKT_IS_SIGNAL_ONE(packet.type));
-      GTEST_DEATH_TEST_CHECK_(packet.signal.observed & ZX_PROCESS_TERMINATED);
-      process_terminated = true;
-    } else if (packet.key == kSocketKey) {
-      GTEST_DEATH_TEST_CHECK_(ZX_PKT_IS_SIGNAL_ONE(packet.type));
-      if (packet.signal.observed & ZX_SOCKET_READABLE) {
-        // Read data from the socket.
-        constexpr size_t kBufferSize = 1024;
-        do {
-          size_t old_length = captured_stderr_.length();
-          size_t bytes_read = 0;
-          captured_stderr_.resize(old_length + kBufferSize);
-          status_zx = stderr_socket_.read(
-              0, &captured_stderr_.front() + old_length, kBufferSize,
-              &bytes_read);
-          captured_stderr_.resize(old_length + bytes_read);
-        } while (status_zx == ZX_OK);
-        if (status_zx == ZX_ERR_PEER_CLOSED) {
-          socket_closed = true;
-        } else {
-          GTEST_DEATH_TEST_CHECK_(status_zx == ZX_ERR_SHOULD_WAIT);
-          status_zx = stderr_socket_.wait_async(
-              port, kSocketKey, ZX_SOCKET_READABLE | ZX_SOCKET_PEER_CLOSED, 0);
-          GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-        }
-      } else {
-        GTEST_DEATH_TEST_CHECK_(packet.signal.observed & ZX_SOCKET_PEER_CLOSED);
-        socket_closed = true;
-      }
-    }
-  } while (!process_terminated && !socket_closed);
-
-  ReadAndInterpretStatusByte();
-
-  zx_info_process_v2_t buffer;
-  status_zx = child_process_.get_info(
-      ZX_INFO_PROCESS_V2, &buffer, sizeof(buffer), nullptr, nullptr);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  GTEST_DEATH_TEST_CHECK_(buffer.flags & ZX_INFO_PROCESS_FLAG_EXITED);
-  set_status(static_cast<int>(buffer.return_code));
-  return status();
-}
-
-// The AssumeRole process for a Fuchsia death test.  It creates a child
-// process with the same executable as the current process to run the
-// death test.  The child process is given the --gtest_filter and
-// --gtest_internal_run_death_test flags such that it knows to run the
-// current death test only.
-DeathTest::TestRole FuchsiaDeathTest::AssumeRole() {
-  const UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const TestInfo* const info = impl->current_test_info();
-  const int death_test_index = info->result()->death_test_count();
-
-  if (flag != nullptr) {
-    // ParseInternalRunDeathTestFlag() has performed all the necessary
-    // processing.
-    set_write_fd(kFuchsiaReadPipeFd);
-    return EXECUTE_TEST;
-  }
-
-  // Flush the log buffers since the log streams are shared with the child.
-  FlushInfoLog();
-
-  // Build the child process command line.
-  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
-                                  kFilterFlag + "=" + info->test_suite_name() +
-                                  "." + info->name();
-  const std::string internal_flag =
-      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag + "="
-      + file_ + "|"
-      + StreamableToString(line_) + "|"
-      + StreamableToString(death_test_index);
-  Arguments args;
-  args.AddArguments(GetInjectableArgvs());
-  args.AddArgument(filter_flag.c_str());
-  args.AddArgument(internal_flag.c_str());
-
-  // Build the pipe for communication with the child.
-  zx_status_t status;
-  zx_handle_t child_pipe_handle;
-  int child_pipe_fd;
-  status = fdio_pipe_half(&child_pipe_fd, &child_pipe_handle);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-  set_read_fd(child_pipe_fd);
-
-  // Set the pipe handle for the child.
-  fdio_spawn_action_t spawn_actions[2] = {};
-  fdio_spawn_action_t* add_handle_action = &spawn_actions[0];
-  add_handle_action->action = FDIO_SPAWN_ACTION_ADD_HANDLE;
-  add_handle_action->h.id = PA_HND(PA_FD, kFuchsiaReadPipeFd);
-  add_handle_action->h.handle = child_pipe_handle;
-
-  // Create a socket pair will be used to receive the child process' stderr.
-  zx::socket stderr_producer_socket;
-  status =
-      zx::socket::create(0, &stderr_producer_socket, &stderr_socket_);
-  GTEST_DEATH_TEST_CHECK_(status >= 0);
-  int stderr_producer_fd = -1;
-  status =
-      fdio_fd_create(stderr_producer_socket.release(), &stderr_producer_fd);
-  GTEST_DEATH_TEST_CHECK_(status >= 0);
-
-  // Make the stderr socket nonblocking.
-  GTEST_DEATH_TEST_CHECK_(fcntl(stderr_producer_fd, F_SETFL, 0) == 0);
-
-  fdio_spawn_action_t* add_stderr_action = &spawn_actions[1];
-  add_stderr_action->action = FDIO_SPAWN_ACTION_CLONE_FD;
-  add_stderr_action->fd.local_fd = stderr_producer_fd;
-  add_stderr_action->fd.target_fd = STDERR_FILENO;
-
-  // Create a child job.
-  zx_handle_t child_job = ZX_HANDLE_INVALID;
-  status = zx_job_create(zx_job_default(), 0, & child_job);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-  zx_policy_basic_t policy;
-  policy.condition = ZX_POL_NEW_ANY;
-  policy.policy = ZX_POL_ACTION_ALLOW;
-  status = zx_job_set_policy(
-      child_job, ZX_JOB_POL_RELATIVE, ZX_JOB_POL_BASIC, &policy, 1);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-
-  // Create an exception channel attached to the |child_job|, to allow
-  // us to suppress the system default exception handler from firing.
-  status =
-      zx_task_create_exception_channel(
-          child_job, 0, exception_channel_.reset_and_get_address());
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-
-  // Spawn the child process.
-  status = fdio_spawn_etc(
-      child_job, FDIO_SPAWN_CLONE_ALL, args.Argv()[0], args.Argv(), nullptr,
-      2, spawn_actions, child_process_.reset_and_get_address(), nullptr);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-
-  set_spawned(true);
-  return OVERSEE_TEST;
-}
-
-std::string FuchsiaDeathTest::GetErrorLogs() {
-  return captured_stderr_;
-}
-
-#else  // We are neither on Windows, nor on Fuchsia.
-
-// ForkingDeathTest provides implementations for most of the abstract
-// methods of the DeathTest interface.  Only the AssumeRole method is
-// left undefined.
-class ForkingDeathTest : public DeathTestImpl {
- public:
-  ForkingDeathTest(const char* statement, Matcher<const std::string&> matcher);
-
-  // All of these virtual functions are inherited from DeathTest.
-  int Wait() override;
-
- protected:
-  void set_child_pid(pid_t child_pid) { child_pid_ = child_pid; }
-
- private:
-  // PID of child process during death test; 0 in the child process itself.
-  pid_t child_pid_;
-};
-
-// Constructs a ForkingDeathTest.
-ForkingDeathTest::ForkingDeathTest(const char* a_statement,
-                                   Matcher<const std::string&> matcher)
-    : DeathTestImpl(a_statement, std::move(matcher)), child_pid_(-1) {}
-
-// Waits for the child in a death test to exit, returning its exit
-// status, or 0 if no child process exists.  As a side effect, sets the
-// outcome data member.
-int ForkingDeathTest::Wait() {
-  if (!spawned())
-    return 0;
-
-  ReadAndInterpretStatusByte();
-
-  int status_value;
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(waitpid(child_pid_, &status_value, 0));
-  set_status(status_value);
-  return status_value;
-}
-
-// A concrete death test class that forks, then immediately runs the test
-// in the child process.
-class NoExecDeathTest : public ForkingDeathTest {
- public:
-  NoExecDeathTest(const char* a_statement, Matcher<const std::string&> matcher)
-      : ForkingDeathTest(a_statement, std::move(matcher)) {}
-  TestRole AssumeRole() override;
-};
-
-// The AssumeRole process for a fork-and-run death test.  It implements a
-// straightforward fork, with a simple pipe to transmit the status byte.
-DeathTest::TestRole NoExecDeathTest::AssumeRole() {
-  const size_t thread_count = GetThreadCount();
-  if (thread_count != 1) {
-    GTEST_LOG_(WARNING) << DeathTestThreadWarning(thread_count);
-  }
-
-  int pipe_fd[2];
-  GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1);
-
-  DeathTest::set_last_death_test_message("");
-  CaptureStderr();
-  // When we fork the process below, the log file buffers are copied, but the
-  // file descriptors are shared.  We flush all log files here so that closing
-  // the file descriptors in the child process doesn't throw off the
-  // synchronization between descriptors and buffers in the parent process.
-  // This is as close to the fork as possible to avoid a race condition in case
-  // there are multiple threads running before the death test, and another
-  // thread writes to the log file.
-  FlushInfoLog();
-
-  const pid_t child_pid = fork();
-  GTEST_DEATH_TEST_CHECK_(child_pid != -1);
-  set_child_pid(child_pid);
-  if (child_pid == 0) {
-    GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[0]));
-    set_write_fd(pipe_fd[1]);
-    // Redirects all logging to stderr in the child process to prevent
-    // concurrent writes to the log files.  We capture stderr in the parent
-    // process and append the child process' output to a log.
-    LogToStderr();
-    // Event forwarding to the listeners of event listener API mush be shut
-    // down in death test subprocesses.
-    GetUnitTestImpl()->listeners()->SuppressEventForwarding();
-    g_in_fast_death_test_child = true;
-    return EXECUTE_TEST;
-  } else {
-    GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
-    set_read_fd(pipe_fd[0]);
-    set_spawned(true);
-    return OVERSEE_TEST;
-  }
-}
-
-// A concrete death test class that forks and re-executes the main
-// program from the beginning, with command-line flags set that cause
-// only this specific death test to be run.
-class ExecDeathTest : public ForkingDeathTest {
- public:
-  ExecDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
-                const char* file, int line)
-      : ForkingDeathTest(a_statement, std::move(matcher)),
-        file_(file),
-        line_(line) {}
-  TestRole AssumeRole() override;
-
- private:
-  static ::std::vector<std::string> GetArgvsForDeathTestChildProcess() {
-    ::std::vector<std::string> args = GetInjectableArgvs();
-#  if defined(GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_)
-    ::std::vector<std::string> extra_args =
-        GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_();
-    args.insert(args.end(), extra_args.begin(), extra_args.end());
-#  endif  // defined(GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_)
-    return args;
-  }
-  // The name of the file in which the death test is located.
-  const char* const file_;
-  // The line number on which the death test is located.
-  const int line_;
-};
-
-// Utility class for accumulating command-line arguments.
-class Arguments {
- public:
-  Arguments() { args_.push_back(nullptr); }
-
-  ~Arguments() {
-    for (std::vector<char*>::iterator i = args_.begin(); i != args_.end();
-         ++i) {
-      free(*i);
-    }
-  }
-  void AddArgument(const char* argument) {
-    args_.insert(args_.end() - 1, posix::StrDup(argument));
-  }
-
-  template <typename Str>
-  void AddArguments(const ::std::vector<Str>& arguments) {
-    for (typename ::std::vector<Str>::const_iterator i = arguments.begin();
-         i != arguments.end();
-         ++i) {
-      args_.insert(args_.end() - 1, posix::StrDup(i->c_str()));
-    }
-  }
-  char* const* Argv() {
-    return &args_[0];
-  }
-
- private:
-  std::vector<char*> args_;
-};
-
-// A struct that encompasses the arguments to the child process of a
-// threadsafe-style death test process.
-struct ExecDeathTestArgs {
-  char* const* argv;  // Command-line arguments for the child's call to exec
-  int close_fd;       // File descriptor to close; the read end of a pipe
-};
-
-#  if GTEST_OS_QNX
-extern "C" char** environ;
-#  else  // GTEST_OS_QNX
-// The main function for a threadsafe-style death test child process.
-// This function is called in a clone()-ed process and thus must avoid
-// any potentially unsafe operations like malloc or libc functions.
-static int ExecDeathTestChildMain(void* child_arg) {
-  ExecDeathTestArgs* const args = static_cast<ExecDeathTestArgs*>(child_arg);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(args->close_fd));
-
-  // We need to execute the test program in the same environment where
-  // it was originally invoked.  Therefore we change to the original
-  // working directory first.
-  const char* const original_dir =
-      UnitTest::GetInstance()->original_working_dir();
-  // We can safely call chdir() as it's a direct system call.
-  if (chdir(original_dir) != 0) {
-    DeathTestAbort(std::string("chdir(\"") + original_dir + "\") failed: " +
-                   GetLastErrnoDescription());
-    return EXIT_FAILURE;
-  }
-
-  // We can safely call execv() as it's almost a direct system call. We
-  // cannot use execvp() as it's a libc function and thus potentially
-  // unsafe.  Since execv() doesn't search the PATH, the user must
-  // invoke the test program via a valid path that contains at least
-  // one path separator.
-  execv(args->argv[0], args->argv);
-  DeathTestAbort(std::string("execv(") + args->argv[0] + ", ...) in " +
-                 original_dir + " failed: " +
-                 GetLastErrnoDescription());
-  return EXIT_FAILURE;
-}
-#  endif  // GTEST_OS_QNX
-
-#  if GTEST_HAS_CLONE
-// Two utility routines that together determine the direction the stack
-// grows.
-// This could be accomplished more elegantly by a single recursive
-// function, but we want to guard against the unlikely possibility of
-// a smart compiler optimizing the recursion away.
-//
-// GTEST_NO_INLINE_ is required to prevent GCC 4.6 from inlining
-// StackLowerThanAddress into StackGrowsDown, which then doesn't give
-// correct answer.
-static void StackLowerThanAddress(const void* ptr,
-                                  bool* result) GTEST_NO_INLINE_;
-// Make sure sanitizers do not tamper with the stack here.
-// Ideally, we want to use `__builtin_frame_address` instead of a local variable
-// address with sanitizer disabled, but it does not work when the
-// compiler optimizes the stack frame out, which happens on PowerPC targets.
-// HWAddressSanitizer add a random tag to the MSB of the local variable address,
-// making comparison result unpredictable.
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-static void StackLowerThanAddress(const void* ptr, bool* result) {
-  int dummy = 0;
-  *result = std::less<const void*>()(&dummy, ptr);
-}
-
-// Make sure AddressSanitizer does not tamper with the stack here.
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-static bool StackGrowsDown() {
-  int dummy = 0;
-  bool result;
-  StackLowerThanAddress(&dummy, &result);
-  return result;
-}
-#  endif  // GTEST_HAS_CLONE
-
-// Spawns a child process with the same executable as the current process in
-// a thread-safe manner and instructs it to run the death test.  The
-// implementation uses fork(2) + exec.  On systems where clone(2) is
-// available, it is used instead, being slightly more thread-safe.  On QNX,
-// fork supports only single-threaded environments, so this function uses
-// spawn(2) there instead.  The function dies with an error message if
-// anything goes wrong.
-static pid_t ExecDeathTestSpawnChild(char* const* argv, int close_fd) {
-  ExecDeathTestArgs args = { argv, close_fd };
-  pid_t child_pid = -1;
-
-#  if GTEST_OS_QNX
-  // Obtains the current directory and sets it to be closed in the child
-  // process.
-  const int cwd_fd = open(".", O_RDONLY);
-  GTEST_DEATH_TEST_CHECK_(cwd_fd != -1);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(fcntl(cwd_fd, F_SETFD, FD_CLOEXEC));
-  // We need to execute the test program in the same environment where
-  // it was originally invoked.  Therefore we change to the original
-  // working directory first.
-  const char* const original_dir =
-      UnitTest::GetInstance()->original_working_dir();
-  // We can safely call chdir() as it's a direct system call.
-  if (chdir(original_dir) != 0) {
-    DeathTestAbort(std::string("chdir(\"") + original_dir + "\") failed: " +
-                   GetLastErrnoDescription());
-    return EXIT_FAILURE;
-  }
-
-  int fd_flags;
-  // Set close_fd to be closed after spawn.
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(fd_flags = fcntl(close_fd, F_GETFD));
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(fcntl(close_fd, F_SETFD,
-                                        fd_flags | FD_CLOEXEC));
-  struct inheritance inherit = {0};
-  // spawn is a system call.
-  child_pid = spawn(args.argv[0], 0, nullptr, &inherit, args.argv, environ);
-  // Restores the current working directory.
-  GTEST_DEATH_TEST_CHECK_(fchdir(cwd_fd) != -1);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(cwd_fd));
-
-#  else   // GTEST_OS_QNX
-#   if GTEST_OS_LINUX
-  // When a SIGPROF signal is received while fork() or clone() are executing,
-  // the process may hang. To avoid this, we ignore SIGPROF here and re-enable
-  // it after the call to fork()/clone() is complete.
-  struct sigaction saved_sigprof_action;
-  struct sigaction ignore_sigprof_action;
-  memset(&ignore_sigprof_action, 0, sizeof(ignore_sigprof_action));
-  sigemptyset(&ignore_sigprof_action.sa_mask);
-  ignore_sigprof_action.sa_handler = SIG_IGN;
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(sigaction(
-      SIGPROF, &ignore_sigprof_action, &saved_sigprof_action));
-#   endif  // GTEST_OS_LINUX
-
-#   if GTEST_HAS_CLONE
-  const bool use_fork = GTEST_FLAG(death_test_use_fork);
-
-  if (!use_fork) {
-    static const bool stack_grows_down = StackGrowsDown();
-    const auto stack_size = static_cast<size_t>(getpagesize() * 2);
-    // MMAP_ANONYMOUS is not defined on Mac, so we use MAP_ANON instead.
-    void* const stack = mmap(nullptr, stack_size, PROT_READ | PROT_WRITE,
-                             MAP_ANON | MAP_PRIVATE, -1, 0);
-    GTEST_DEATH_TEST_CHECK_(stack != MAP_FAILED);
-
-    // Maximum stack alignment in bytes:  For a downward-growing stack, this
-    // amount is subtracted from size of the stack space to get an address
-    // that is within the stack space and is aligned on all systems we care
-    // about.  As far as I know there is no ABI with stack alignment greater
-    // than 64.  We assume stack and stack_size already have alignment of
-    // kMaxStackAlignment.
-    const size_t kMaxStackAlignment = 64;
-    void* const stack_top =
-        static_cast<char*>(stack) +
-            (stack_grows_down ? stack_size - kMaxStackAlignment : 0);
-    GTEST_DEATH_TEST_CHECK_(
-        static_cast<size_t>(stack_size) > kMaxStackAlignment &&
-        reinterpret_cast<uintptr_t>(stack_top) % kMaxStackAlignment == 0);
-
-    child_pid = clone(&ExecDeathTestChildMain, stack_top, SIGCHLD, &args);
-
-    GTEST_DEATH_TEST_CHECK_(munmap(stack, stack_size) != -1);
-  }
-#   else
-  const bool use_fork = true;
-#   endif  // GTEST_HAS_CLONE
-
-  if (use_fork && (child_pid = fork()) == 0) {
-      ExecDeathTestChildMain(&args);
-      _exit(0);
-  }
-#  endif  // GTEST_OS_QNX
-#  if GTEST_OS_LINUX
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(
-      sigaction(SIGPROF, &saved_sigprof_action, nullptr));
-#  endif  // GTEST_OS_LINUX
-
-  GTEST_DEATH_TEST_CHECK_(child_pid != -1);
-  return child_pid;
-}
-
-// The AssumeRole process for a fork-and-exec death test.  It re-executes the
-// main program from the beginning, setting the --gtest_filter
-// and --gtest_internal_run_death_test flags to cause only the current
-// death test to be re-run.
-DeathTest::TestRole ExecDeathTest::AssumeRole() {
-  const UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const TestInfo* const info = impl->current_test_info();
-  const int death_test_index = info->result()->death_test_count();
-
-  if (flag != nullptr) {
-    set_write_fd(flag->write_fd());
-    return EXECUTE_TEST;
-  }
-
-  int pipe_fd[2];
-  GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1);
-  // Clear the close-on-exec flag on the write end of the pipe, lest
-  // it be closed when the child process does an exec:
-  GTEST_DEATH_TEST_CHECK_(fcntl(pipe_fd[1], F_SETFD, 0) != -1);
-
-  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
-                                  kFilterFlag + "=" + info->test_suite_name() +
-                                  "." + info->name();
-  const std::string internal_flag =
-      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag + "="
-      + file_ + "|" + StreamableToString(line_) + "|"
-      + StreamableToString(death_test_index) + "|"
-      + StreamableToString(pipe_fd[1]);
-  Arguments args;
-  args.AddArguments(GetArgvsForDeathTestChildProcess());
-  args.AddArgument(filter_flag.c_str());
-  args.AddArgument(internal_flag.c_str());
-
-  DeathTest::set_last_death_test_message("");
-
-  CaptureStderr();
-  // See the comment in NoExecDeathTest::AssumeRole for why the next line
-  // is necessary.
-  FlushInfoLog();
-
-  const pid_t child_pid = ExecDeathTestSpawnChild(args.Argv(), pipe_fd[0]);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
-  set_child_pid(child_pid);
-  set_read_fd(pipe_fd[0]);
-  set_spawned(true);
-  return OVERSEE_TEST;
-}
-
-# endif  // !GTEST_OS_WINDOWS
-
-// Creates a concrete DeathTest-derived class that depends on the
-// --gtest_death_test_style flag, and sets the pointer pointed to
-// by the "test" argument to its address.  If the test should be
-// skipped, sets that pointer to NULL.  Returns true, unless the
-// flag is set to an invalid value.
-bool DefaultDeathTestFactory::Create(const char* statement,
-                                     Matcher<const std::string&> matcher,
-                                     const char* file, int line,
-                                     DeathTest** test) {
-  UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const int death_test_index = impl->current_test_info()
-      ->increment_death_test_count();
-
-  if (flag != nullptr) {
-    if (death_test_index > flag->index()) {
-      DeathTest::set_last_death_test_message(
-          "Death test count (" + StreamableToString(death_test_index)
-          + ") somehow exceeded expected maximum ("
-          + StreamableToString(flag->index()) + ")");
-      return false;
-    }
-
-    if (!(flag->file() == file && flag->line() == line &&
-          flag->index() == death_test_index)) {
-      *test = nullptr;
-      return true;
-    }
-  }
-
-# if GTEST_OS_WINDOWS
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe" ||
-      GTEST_FLAG(death_test_style) == "fast") {
-    *test = new WindowsDeathTest(statement, std::move(matcher), file, line);
-  }
-
-# elif GTEST_OS_FUCHSIA
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe" ||
-      GTEST_FLAG(death_test_style) == "fast") {
-    *test = new FuchsiaDeathTest(statement, std::move(matcher), file, line);
-  }
-
-# else
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe") {
-    *test = new ExecDeathTest(statement, std::move(matcher), file, line);
-  } else if (GTEST_FLAG(death_test_style) == "fast") {
-    *test = new NoExecDeathTest(statement, std::move(matcher));
-  }
-
-# endif  // GTEST_OS_WINDOWS
-
-  else {  // NOLINT - this is more readable than unbalanced brackets inside #if.
-    DeathTest::set_last_death_test_message(
-        "Unknown death test style \"" + GTEST_FLAG(death_test_style)
-        + "\" encountered");
-    return false;
-  }
-
-  return true;
-}
-
-# if GTEST_OS_WINDOWS
-// Recreates the pipe and event handles from the provided parameters,
-// signals the event, and returns a file descriptor wrapped around the pipe
-// handle. This function is called in the child process only.
-static int GetStatusFileDescriptor(unsigned int parent_process_id,
-                            size_t write_handle_as_size_t,
-                            size_t event_handle_as_size_t) {
-  AutoHandle parent_process_handle(::OpenProcess(PROCESS_DUP_HANDLE,
-                                                   FALSE,  // Non-inheritable.
-                                                   parent_process_id));
-  if (parent_process_handle.Get() == INVALID_HANDLE_VALUE) {
-    DeathTestAbort("Unable to open parent process " +
-                   StreamableToString(parent_process_id));
-  }
-
-  GTEST_CHECK_(sizeof(HANDLE) <= sizeof(size_t));
-
-  const HANDLE write_handle =
-      reinterpret_cast<HANDLE>(write_handle_as_size_t);
-  HANDLE dup_write_handle;
-
-  // The newly initialized handle is accessible only in the parent
-  // process. To obtain one accessible within the child, we need to use
-  // DuplicateHandle.
-  if (!::DuplicateHandle(parent_process_handle.Get(), write_handle,
-                         ::GetCurrentProcess(), &dup_write_handle,
-                         0x0,    // Requested privileges ignored since
-                                 // DUPLICATE_SAME_ACCESS is used.
-                         FALSE,  // Request non-inheritable handler.
-                         DUPLICATE_SAME_ACCESS)) {
-    DeathTestAbort("Unable to duplicate the pipe handle " +
-                   StreamableToString(write_handle_as_size_t) +
-                   " from the parent process " +
-                   StreamableToString(parent_process_id));
-  }
-
-  const HANDLE event_handle = reinterpret_cast<HANDLE>(event_handle_as_size_t);
-  HANDLE dup_event_handle;
-
-  if (!::DuplicateHandle(parent_process_handle.Get(), event_handle,
-                         ::GetCurrentProcess(), &dup_event_handle,
-                         0x0,
-                         FALSE,
-                         DUPLICATE_SAME_ACCESS)) {
-    DeathTestAbort("Unable to duplicate the event handle " +
-                   StreamableToString(event_handle_as_size_t) +
-                   " from the parent process " +
-                   StreamableToString(parent_process_id));
-  }
-
-  const int write_fd =
-      ::_open_osfhandle(reinterpret_cast<intptr_t>(dup_write_handle), O_APPEND);
-  if (write_fd == -1) {
-    DeathTestAbort("Unable to convert pipe handle " +
-                   StreamableToString(write_handle_as_size_t) +
-                   " to a file descriptor");
-  }
-
-  // Signals the parent that the write end of the pipe has been acquired
-  // so the parent can release its own write end.
-  ::SetEvent(dup_event_handle);
-
-  return write_fd;
-}
-# endif  // GTEST_OS_WINDOWS
-
-// Returns a newly created InternalRunDeathTestFlag object with fields
-// initialized from the GTEST_FLAG(internal_run_death_test) flag if
-// the flag is specified; otherwise returns NULL.
-InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag() {
-  if (GTEST_FLAG(internal_run_death_test) == "") return nullptr;
-
-  // GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we
-  // can use it here.
-  int line = -1;
-  int index = -1;
-  ::std::vector< ::std::string> fields;
-  SplitString(GTEST_FLAG(internal_run_death_test).c_str(), '|', &fields);
-  int write_fd = -1;
-
-# if GTEST_OS_WINDOWS
-
-  unsigned int parent_process_id = 0;
-  size_t write_handle_as_size_t = 0;
-  size_t event_handle_as_size_t = 0;
-
-  if (fields.size() != 6
-      || !ParseNaturalNumber(fields[1], &line)
-      || !ParseNaturalNumber(fields[2], &index)
-      || !ParseNaturalNumber(fields[3], &parent_process_id)
-      || !ParseNaturalNumber(fields[4], &write_handle_as_size_t)
-      || !ParseNaturalNumber(fields[5], &event_handle_as_size_t)) {
-    DeathTestAbort("Bad --gtest_internal_run_death_test flag: " +
-                   GTEST_FLAG(internal_run_death_test));
-  }
-  write_fd = GetStatusFileDescriptor(parent_process_id,
-                                     write_handle_as_size_t,
-                                     event_handle_as_size_t);
-
-# elif GTEST_OS_FUCHSIA
-
-  if (fields.size() != 3
-      || !ParseNaturalNumber(fields[1], &line)
-      || !ParseNaturalNumber(fields[2], &index)) {
-    DeathTestAbort("Bad --gtest_internal_run_death_test flag: "
-        + GTEST_FLAG(internal_run_death_test));
-  }
-
-# else
-
-  if (fields.size() != 4
-      || !ParseNaturalNumber(fields[1], &line)
-      || !ParseNaturalNumber(fields[2], &index)
-      || !ParseNaturalNumber(fields[3], &write_fd)) {
-    DeathTestAbort("Bad --gtest_internal_run_death_test flag: "
-        + GTEST_FLAG(internal_run_death_test));
-  }
-
-# endif  // GTEST_OS_WINDOWS
-
-  return new InternalRunDeathTestFlag(fields[0], line, index, write_fd);
-}
-
-}  // namespace internal
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-}  // namespace testing
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include <stdlib.h>
-
-#if GTEST_OS_WINDOWS_MOBILE
-# include <windows.h>
-#elif GTEST_OS_WINDOWS
-# include <direct.h>
-# include <io.h>
-#else
-# include <limits.h>
-# include <climits>  // Some Linux distributions define PATH_MAX here.
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-
-#if GTEST_OS_WINDOWS
-# define GTEST_PATH_MAX_ _MAX_PATH
-#elif defined(PATH_MAX)
-# define GTEST_PATH_MAX_ PATH_MAX
-#elif defined(_XOPEN_PATH_MAX)
-# define GTEST_PATH_MAX_ _XOPEN_PATH_MAX
-#else
-# define GTEST_PATH_MAX_ _POSIX_PATH_MAX
-#endif  // GTEST_OS_WINDOWS
-
-namespace testing {
-namespace internal {
-
-#if GTEST_OS_WINDOWS
-// On Windows, '\\' is the standard path separator, but many tools and the
-// Windows API also accept '/' as an alternate path separator. Unless otherwise
-// noted, a file path can contain either kind of path separators, or a mixture
-// of them.
-const char kPathSeparator = '\\';
-const char kAlternatePathSeparator = '/';
-const char kAlternatePathSeparatorString[] = "/";
-# if GTEST_OS_WINDOWS_MOBILE
-// Windows CE doesn't have a current directory. You should not use
-// the current directory in tests on Windows CE, but this at least
-// provides a reasonable fallback.
-const char kCurrentDirectoryString[] = "\\";
-// Windows CE doesn't define INVALID_FILE_ATTRIBUTES
-const DWORD kInvalidFileAttributes = 0xffffffff;
-# else
-const char kCurrentDirectoryString[] = ".\\";
-# endif  // GTEST_OS_WINDOWS_MOBILE
-#else
-const char kPathSeparator = '/';
-const char kCurrentDirectoryString[] = "./";
-#endif  // GTEST_OS_WINDOWS
-
-// Returns whether the given character is a valid path separator.
-static bool IsPathSeparator(char c) {
-#if GTEST_HAS_ALT_PATH_SEP_
-  return (c == kPathSeparator) || (c == kAlternatePathSeparator);
-#else
-  return c == kPathSeparator;
-#endif
-}
-
-// Returns the current working directory, or "" if unsuccessful.
-FilePath FilePath::GetCurrentDir() {
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE ||         \
-    GTEST_OS_WINDOWS_RT || GTEST_OS_ESP8266 || GTEST_OS_ESP32 || \
-    GTEST_OS_XTENSA
-  // These platforms do not have a current directory, so we just return
-  // something reasonable.
-  return FilePath(kCurrentDirectoryString);
-#elif GTEST_OS_WINDOWS
-  char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
-  return FilePath(_getcwd(cwd, sizeof(cwd)) == nullptr ? "" : cwd);
-#else
-  char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
-  char* result = getcwd(cwd, sizeof(cwd));
-# if GTEST_OS_NACL
-  // getcwd will likely fail in NaCl due to the sandbox, so return something
-  // reasonable. The user may have provided a shim implementation for getcwd,
-  // however, so fallback only when failure is detected.
-  return FilePath(result == nullptr ? kCurrentDirectoryString : cwd);
-# endif  // GTEST_OS_NACL
-  return FilePath(result == nullptr ? "" : cwd);
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-// Returns a copy of the FilePath with the case-insensitive extension removed.
-// Example: FilePath("dir/file.exe").RemoveExtension("EXE") returns
-// FilePath("dir/file"). If a case-insensitive extension is not
-// found, returns a copy of the original FilePath.
-FilePath FilePath::RemoveExtension(const char* extension) const {
-  const std::string dot_extension = std::string(".") + extension;
-  if (String::EndsWithCaseInsensitive(pathname_, dot_extension)) {
-    return FilePath(pathname_.substr(
-        0, pathname_.length() - dot_extension.length()));
-  }
-  return *this;
-}
-
-// Returns a pointer to the last occurrence of a valid path separator in
-// the FilePath. On Windows, for example, both '/' and '\' are valid path
-// separators. Returns NULL if no path separator was found.
-const char* FilePath::FindLastPathSeparator() const {
-  const char* const last_sep = strrchr(c_str(), kPathSeparator);
-#if GTEST_HAS_ALT_PATH_SEP_
-  const char* const last_alt_sep = strrchr(c_str(), kAlternatePathSeparator);
-  // Comparing two pointers of which only one is NULL is undefined.
-  if (last_alt_sep != nullptr &&
-      (last_sep == nullptr || last_alt_sep > last_sep)) {
-    return last_alt_sep;
-  }
-#endif
-  return last_sep;
-}
-
-// Returns a copy of the FilePath with the directory part removed.
-// Example: FilePath("path/to/file").RemoveDirectoryName() returns
-// FilePath("file"). If there is no directory part ("just_a_file"), it returns
-// the FilePath unmodified. If there is no file part ("just_a_dir/") it
-// returns an empty FilePath ("").
-// On Windows platform, '\' is the path separator, otherwise it is '/'.
-FilePath FilePath::RemoveDirectoryName() const {
-  const char* const last_sep = FindLastPathSeparator();
-  return last_sep ? FilePath(last_sep + 1) : *this;
-}
-
-// RemoveFileName returns the directory path with the filename removed.
-// Example: FilePath("path/to/file").RemoveFileName() returns "path/to/".
-// If the FilePath is "a_file" or "/a_file", RemoveFileName returns
-// FilePath("./") or, on Windows, FilePath(".\\"). If the filepath does
-// not have a file, like "just/a/dir/", it returns the FilePath unmodified.
-// On Windows platform, '\' is the path separator, otherwise it is '/'.
-FilePath FilePath::RemoveFileName() const {
-  const char* const last_sep = FindLastPathSeparator();
-  std::string dir;
-  if (last_sep) {
-    dir = std::string(c_str(), static_cast<size_t>(last_sep + 1 - c_str()));
-  } else {
-    dir = kCurrentDirectoryString;
-  }
-  return FilePath(dir);
-}
-
-// Helper functions for naming files in a directory for xml output.
-
-// Given directory = "dir", base_name = "test", number = 0,
-// extension = "xml", returns "dir/test.xml". If number is greater
-// than zero (e.g., 12), returns "dir/test_12.xml".
-// On Windows platform, uses \ as the separator rather than /.
-FilePath FilePath::MakeFileName(const FilePath& directory,
-                                const FilePath& base_name,
-                                int number,
-                                const char* extension) {
-  std::string file;
-  if (number == 0) {
-    file = base_name.string() + "." + extension;
-  } else {
-    file = base_name.string() + "_" + StreamableToString(number)
-        + "." + extension;
-  }
-  return ConcatPaths(directory, FilePath(file));
-}
-
-// Given directory = "dir", relative_path = "test.xml", returns "dir/test.xml".
-// On Windows, uses \ as the separator rather than /.
-FilePath FilePath::ConcatPaths(const FilePath& directory,
-                               const FilePath& relative_path) {
-  if (directory.IsEmpty())
-    return relative_path;
-  const FilePath dir(directory.RemoveTrailingPathSeparator());
-  return FilePath(dir.string() + kPathSeparator + relative_path.string());
-}
-
-// Returns true if pathname describes something findable in the file-system,
-// either a file, directory, or whatever.
-bool FilePath::FileOrDirectoryExists() const {
-#if GTEST_OS_WINDOWS_MOBILE
-  LPCWSTR unicode = String::AnsiToUtf16(pathname_.c_str());
-  const DWORD attributes = GetFileAttributes(unicode);
-  delete [] unicode;
-  return attributes != kInvalidFileAttributes;
-#else
-  posix::StatStruct file_stat;
-  return posix::Stat(pathname_.c_str(), &file_stat) == 0;
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-// Returns true if pathname describes a directory in the file-system
-// that exists.
-bool FilePath::DirectoryExists() const {
-  bool result = false;
-#if GTEST_OS_WINDOWS
-  // Don't strip off trailing separator if path is a root directory on
-  // Windows (like "C:\\").
-  const FilePath& path(IsRootDirectory() ? *this :
-                                           RemoveTrailingPathSeparator());
-#else
-  const FilePath& path(*this);
-#endif
-
-#if GTEST_OS_WINDOWS_MOBILE
-  LPCWSTR unicode = String::AnsiToUtf16(path.c_str());
-  const DWORD attributes = GetFileAttributes(unicode);
-  delete [] unicode;
-  if ((attributes != kInvalidFileAttributes) &&
-      (attributes & FILE_ATTRIBUTE_DIRECTORY)) {
-    result = true;
-  }
-#else
-  posix::StatStruct file_stat;
-  result = posix::Stat(path.c_str(), &file_stat) == 0 &&
-      posix::IsDir(file_stat);
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-  return result;
-}
-
-// Returns true if pathname describes a root directory. (Windows has one
-// root directory per disk drive.)
-bool FilePath::IsRootDirectory() const {
-#if GTEST_OS_WINDOWS
-  return pathname_.length() == 3 && IsAbsolutePath();
-#else
-  return pathname_.length() == 1 && IsPathSeparator(pathname_.c_str()[0]);
-#endif
-}
-
-// Returns true if pathname describes an absolute path.
-bool FilePath::IsAbsolutePath() const {
-  const char* const name = pathname_.c_str();
-#if GTEST_OS_WINDOWS
-  return pathname_.length() >= 3 &&
-     ((name[0] >= 'a' && name[0] <= 'z') ||
-      (name[0] >= 'A' && name[0] <= 'Z')) &&
-     name[1] == ':' &&
-     IsPathSeparator(name[2]);
-#else
-  return IsPathSeparator(name[0]);
-#endif
-}
-
-// Returns a pathname for a file that does not currently exist. The pathname
-// will be directory/base_name.extension or
-// directory/base_name_<number>.extension if directory/base_name.extension
-// already exists. The number will be incremented until a pathname is found
-// that does not already exist.
-// Examples: 'dir/foo_test.xml' or 'dir/foo_test_1.xml'.
-// There could be a race condition if two or more processes are calling this
-// function at the same time -- they could both pick the same filename.
-FilePath FilePath::GenerateUniqueFileName(const FilePath& directory,
-                                          const FilePath& base_name,
-                                          const char* extension) {
-  FilePath full_pathname;
-  int number = 0;
-  do {
-    full_pathname.Set(MakeFileName(directory, base_name, number++, extension));
-  } while (full_pathname.FileOrDirectoryExists());
-  return full_pathname;
-}
-
-// Returns true if FilePath ends with a path separator, which indicates that
-// it is intended to represent a directory. Returns false otherwise.
-// This does NOT check that a directory (or file) actually exists.
-bool FilePath::IsDirectory() const {
-  return !pathname_.empty() &&
-         IsPathSeparator(pathname_.c_str()[pathname_.length() - 1]);
-}
-
-// Create directories so that path exists. Returns true if successful or if
-// the directories already exist; returns false if unable to create directories
-// for any reason.
-bool FilePath::CreateDirectoriesRecursively() const {
-  if (!this->IsDirectory()) {
-    return false;
-  }
-
-  if (pathname_.length() == 0 || this->DirectoryExists()) {
-    return true;
-  }
-
-  const FilePath parent(this->RemoveTrailingPathSeparator().RemoveFileName());
-  return parent.CreateDirectoriesRecursively() && this->CreateFolder();
-}
-
-// Create the directory so that path exists. Returns true if successful or
-// if the directory already exists; returns false if unable to create the
-// directory for any reason, including if the parent directory does not
-// exist. Not named "CreateDirectory" because that's a macro on Windows.
-bool FilePath::CreateFolder() const {
-#if GTEST_OS_WINDOWS_MOBILE
-  FilePath removed_sep(this->RemoveTrailingPathSeparator());
-  LPCWSTR unicode = String::AnsiToUtf16(removed_sep.c_str());
-  int result = CreateDirectory(unicode, nullptr) ? 0 : -1;
-  delete [] unicode;
-#elif GTEST_OS_WINDOWS
-  int result = _mkdir(pathname_.c_str());
-#elif GTEST_OS_ESP8266 || GTEST_OS_XTENSA
-  // do nothing
-  int result = 0;
-#else
-  int result = mkdir(pathname_.c_str(), 0777);
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-  if (result == -1) {
-    return this->DirectoryExists();  // An error is OK if the directory exists.
-  }
-  return true;  // No error.
-}
-
-// If input name has a trailing separator character, remove it and return the
-// name, otherwise return the name string unmodified.
-// On Windows platform, uses \ as the separator, other platforms use /.
-FilePath FilePath::RemoveTrailingPathSeparator() const {
-  return IsDirectory()
-      ? FilePath(pathname_.substr(0, pathname_.length() - 1))
-      : *this;
-}
-
-// Removes any redundant separators that might be in the pathname.
-// For example, "bar///foo" becomes "bar/foo". Does not eliminate other
-// redundancies that might be in a pathname involving "." or "..".
-void FilePath::Normalize() {
-  auto out = pathname_.begin();
-
-  for (const char character : pathname_) {
-    if (!IsPathSeparator(character)) {
-      *(out++) = character;
-    } else if (out == pathname_.begin() || *std::prev(out) != kPathSeparator) {
-      *(out++) = kPathSeparator;
-    } else {
-      continue;
-    }
-  }
-
-  pathname_.erase(out, pathname_.end());
-}
-
-}  // namespace internal
-}  // namespace testing
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file implements just enough of the matcher interface to allow
-// EXPECT_DEATH and friends to accept a matcher argument.
-
-
-#include <string>
-
-namespace testing {
-
-// Constructs a matcher that matches a const std::string& whose value is
-// equal to s.
-Matcher<const std::string&>::Matcher(const std::string& s) { *this = Eq(s); }
-
-// Constructs a matcher that matches a const std::string& whose value is
-// equal to s.
-Matcher<const std::string&>::Matcher(const char* s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a std::string whose value is equal to
-// s.
-Matcher<std::string>::Matcher(const std::string& s) { *this = Eq(s); }
-
-// Constructs a matcher that matches a std::string whose value is equal to
-// s.
-Matcher<std::string>::Matcher(const char* s) { *this = Eq(std::string(s)); }
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-// Constructs a matcher that matches a const StringView& whose value is
-// equal to s.
-Matcher<const internal::StringView&>::Matcher(const std::string& s) {
-  *this = Eq(s);
-}
-
-// Constructs a matcher that matches a const StringView& whose value is
-// equal to s.
-Matcher<const internal::StringView&>::Matcher(const char* s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a const StringView& whose value is
-// equal to s.
-Matcher<const internal::StringView&>::Matcher(internal::StringView s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a StringView whose value is equal to
-// s.
-Matcher<internal::StringView>::Matcher(const std::string& s) { *this = Eq(s); }
-
-// Constructs a matcher that matches a StringView whose value is equal to
-// s.
-Matcher<internal::StringView>::Matcher(const char* s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a StringView whose value is equal to
-// s.
-Matcher<internal::StringView>::Matcher(internal::StringView s) {
-  *this = Eq(std::string(s));
-}
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-}  // namespace testing
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-
-#include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <cstdint>
-#include <fstream>
-#include <memory>
-
-#if GTEST_OS_WINDOWS
-# include <windows.h>
-# include <io.h>
-# include <sys/stat.h>
-# include <map>  // Used in ThreadLocal.
-# ifdef _MSC_VER
-#  include <crtdbg.h>
-# endif  // _MSC_VER
-#else
-# include <unistd.h>
-#endif  // GTEST_OS_WINDOWS
-
-#if GTEST_OS_MAC
-# include <mach/mach_init.h>
-# include <mach/task.h>
-# include <mach/vm_map.h>
-#endif  // GTEST_OS_MAC
-
-#if GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
-    GTEST_OS_NETBSD || GTEST_OS_OPENBSD
-# include <sys/sysctl.h>
-# if GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD
-#  include <sys/user.h>
-# endif
-#endif
-
-#if GTEST_OS_QNX
-# include <devctl.h>
-# include <fcntl.h>
-# include <sys/procfs.h>
-#endif  // GTEST_OS_QNX
-
-#if GTEST_OS_AIX
-# include <procinfo.h>
-# include <sys/types.h>
-#endif  // GTEST_OS_AIX
-
-#if GTEST_OS_FUCHSIA
-# include <zircon/process.h>
-# include <zircon/syscalls.h>
-#endif  // GTEST_OS_FUCHSIA
-
-
-namespace testing {
-namespace internal {
-
-#if defined(_MSC_VER) || defined(__BORLANDC__)
-// MSVC and C++Builder do not provide a definition of STDERR_FILENO.
-const int kStdOutFileno = 1;
-const int kStdErrFileno = 2;
-#else
-const int kStdOutFileno = STDOUT_FILENO;
-const int kStdErrFileno = STDERR_FILENO;
-#endif  // _MSC_VER
-
-#if GTEST_OS_LINUX
-
-namespace {
-template <typename T>
-T ReadProcFileField(const std::string& filename, int field) {
-  std::string dummy;
-  std::ifstream file(filename.c_str());
-  while (field-- > 0) {
-    file >> dummy;
-  }
-  T output = 0;
-  file >> output;
-  return output;
-}
-}  // namespace
-
-// Returns the number of active threads, or 0 when there is an error.
-size_t GetThreadCount() {
-  const std::string filename =
-      (Message() << "/proc/" << getpid() << "/stat").GetString();
-  return ReadProcFileField<size_t>(filename, 19);
-}
-
-#elif GTEST_OS_MAC
-
-size_t GetThreadCount() {
-  const task_t task = mach_task_self();
-  mach_msg_type_number_t thread_count;
-  thread_act_array_t thread_list;
-  const kern_return_t status = task_threads(task, &thread_list, &thread_count);
-  if (status == KERN_SUCCESS) {
-    // task_threads allocates resources in thread_list and we need to free them
-    // to avoid leaks.
-    vm_deallocate(task,
-                  reinterpret_cast<vm_address_t>(thread_list),
-                  sizeof(thread_t) * thread_count);
-    return static_cast<size_t>(thread_count);
-  } else {
-    return 0;
-  }
-}
-
-#elif GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
-      GTEST_OS_NETBSD
-
-#if GTEST_OS_NETBSD
-#undef KERN_PROC
-#define KERN_PROC KERN_PROC2
-#define kinfo_proc kinfo_proc2
-#endif
-
-#if GTEST_OS_DRAGONFLY
-#define KP_NLWP(kp) (kp.kp_nthreads)
-#elif GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD
-#define KP_NLWP(kp) (kp.ki_numthreads)
-#elif GTEST_OS_NETBSD
-#define KP_NLWP(kp) (kp.p_nlwps)
-#endif
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-size_t GetThreadCount() {
-  int mib[] = {
-    CTL_KERN,
-    KERN_PROC,
-    KERN_PROC_PID,
-    getpid(),
-#if GTEST_OS_NETBSD
-    sizeof(struct kinfo_proc),
-    1,
-#endif
-  };
-  u_int miblen = sizeof(mib) / sizeof(mib[0]);
-  struct kinfo_proc info;
-  size_t size = sizeof(info);
-  if (sysctl(mib, miblen, &info, &size, NULL, 0)) {
-    return 0;
-  }
-  return static_cast<size_t>(KP_NLWP(info));
-}
-#elif GTEST_OS_OPENBSD
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-size_t GetThreadCount() {
-  int mib[] = {
-    CTL_KERN,
-    KERN_PROC,
-    KERN_PROC_PID | KERN_PROC_SHOW_THREADS,
-    getpid(),
-    sizeof(struct kinfo_proc),
-    0,
-  };
-  u_int miblen = sizeof(mib) / sizeof(mib[0]);
-
-  // get number of structs
-  size_t size;
-  if (sysctl(mib, miblen, NULL, &size, NULL, 0)) {
-    return 0;
-  }
-
-  mib[5] = static_cast<int>(size / static_cast<size_t>(mib[4]));
-
-  // populate array of structs
-  struct kinfo_proc info[mib[5]];
-  if (sysctl(mib, miblen, &info, &size, NULL, 0)) {
-    return 0;
-  }
-
-  // exclude empty members
-  size_t nthreads = 0;
-  for (size_t i = 0; i < size / static_cast<size_t>(mib[4]); i++) {
-    if (info[i].p_tid != -1)
-      nthreads++;
-  }
-  return nthreads;
-}
-
-#elif GTEST_OS_QNX
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-size_t GetThreadCount() {
-  const int fd = open("/proc/self/as", O_RDONLY);
-  if (fd < 0) {
-    return 0;
-  }
-  procfs_info process_info;
-  const int status =
-      devctl(fd, DCMD_PROC_INFO, &process_info, sizeof(process_info), nullptr);
-  close(fd);
-  if (status == EOK) {
-    return static_cast<size_t>(process_info.num_threads);
-  } else {
-    return 0;
-  }
-}
-
-#elif GTEST_OS_AIX
-
-size_t GetThreadCount() {
-  struct procentry64 entry;
-  pid_t pid = getpid();
-  int status = getprocs64(&entry, sizeof(entry), nullptr, 0, &pid, 1);
-  if (status == 1) {
-    return entry.pi_thcount;
-  } else {
-    return 0;
-  }
-}
-
-#elif GTEST_OS_FUCHSIA
-
-size_t GetThreadCount() {
-  int dummy_buffer;
-  size_t avail;
-  zx_status_t status = zx_object_get_info(
-      zx_process_self(),
-      ZX_INFO_PROCESS_THREADS,
-      &dummy_buffer,
-      0,
-      nullptr,
-      &avail);
-  if (status == ZX_OK) {
-    return avail;
-  } else {
-    return 0;
-  }
-}
-
-#else
-
-size_t GetThreadCount() {
-  // There's no portable way to detect the number of threads, so we just
-  // return 0 to indicate that we cannot detect it.
-  return 0;
-}
-
-#endif  // GTEST_OS_LINUX
-
-#if GTEST_IS_THREADSAFE && GTEST_OS_WINDOWS
-
-void SleepMilliseconds(int n) {
-  ::Sleep(static_cast<DWORD>(n));
-}
-
-AutoHandle::AutoHandle()
-    : handle_(INVALID_HANDLE_VALUE) {}
-
-AutoHandle::AutoHandle(Handle handle)
-    : handle_(handle) {}
-
-AutoHandle::~AutoHandle() {
-  Reset();
-}
-
-AutoHandle::Handle AutoHandle::Get() const {
-  return handle_;
-}
-
-void AutoHandle::Reset() {
-  Reset(INVALID_HANDLE_VALUE);
-}
-
-void AutoHandle::Reset(HANDLE handle) {
-  // Resetting with the same handle we already own is invalid.
-  if (handle_ != handle) {
-    if (IsCloseable()) {
-      ::CloseHandle(handle_);
-    }
-    handle_ = handle;
-  } else {
-    GTEST_CHECK_(!IsCloseable())
-        << "Resetting a valid handle to itself is likely a programmer error "
-            "and thus not allowed.";
-  }
-}
-
-bool AutoHandle::IsCloseable() const {
-  // Different Windows APIs may use either of these values to represent an
-  // invalid handle.
-  return handle_ != nullptr && handle_ != INVALID_HANDLE_VALUE;
-}
-
-Notification::Notification()
-    : event_(::CreateEvent(nullptr,     // Default security attributes.
-                           TRUE,        // Do not reset automatically.
-                           FALSE,       // Initially unset.
-                           nullptr)) {  // Anonymous event.
-  GTEST_CHECK_(event_.Get() != nullptr);
-}
-
-void Notification::Notify() {
-  GTEST_CHECK_(::SetEvent(event_.Get()) != FALSE);
-}
-
-void Notification::WaitForNotification() {
-  GTEST_CHECK_(
-      ::WaitForSingleObject(event_.Get(), INFINITE) == WAIT_OBJECT_0);
-}
-
-Mutex::Mutex()
-    : owner_thread_id_(0),
-      type_(kDynamic),
-      critical_section_init_phase_(0),
-      critical_section_(new CRITICAL_SECTION) {
-  ::InitializeCriticalSection(critical_section_);
-}
-
-Mutex::~Mutex() {
-  // Static mutexes are leaked intentionally. It is not thread-safe to try
-  // to clean them up.
-  if (type_ == kDynamic) {
-    ::DeleteCriticalSection(critical_section_);
-    delete critical_section_;
-    critical_section_ = nullptr;
-  }
-}
-
-void Mutex::Lock() {
-  ThreadSafeLazyInit();
-  ::EnterCriticalSection(critical_section_);
-  owner_thread_id_ = ::GetCurrentThreadId();
-}
-
-void Mutex::Unlock() {
-  ThreadSafeLazyInit();
-  // We don't protect writing to owner_thread_id_ here, as it's the
-  // caller's responsibility to ensure that the current thread holds the
-  // mutex when this is called.
-  owner_thread_id_ = 0;
-  ::LeaveCriticalSection(critical_section_);
-}
-
-// Does nothing if the current thread holds the mutex. Otherwise, crashes
-// with high probability.
-void Mutex::AssertHeld() {
-  ThreadSafeLazyInit();
-  GTEST_CHECK_(owner_thread_id_ == ::GetCurrentThreadId())
-      << "The current thread is not holding the mutex @" << this;
-}
-
-namespace {
-
-#ifdef _MSC_VER
-// Use the RAII idiom to flag mem allocs that are intentionally never
-// deallocated. The motivation is to silence the false positive mem leaks
-// that are reported by the debug version of MS's CRT which can only detect
-// if an alloc is missing a matching deallocation.
-// Example:
-//    MemoryIsNotDeallocated memory_is_not_deallocated;
-//    critical_section_ = new CRITICAL_SECTION;
-//
-class MemoryIsNotDeallocated
-{
- public:
-  MemoryIsNotDeallocated() : old_crtdbg_flag_(0) {
-    old_crtdbg_flag_ = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
-    // Set heap allocation block type to _IGNORE_BLOCK so that MS debug CRT
-    // doesn't report mem leak if there's no matching deallocation.
-    _CrtSetDbgFlag(old_crtdbg_flag_ & ~_CRTDBG_ALLOC_MEM_DF);
-  }
-
-  ~MemoryIsNotDeallocated() {
-    // Restore the original _CRTDBG_ALLOC_MEM_DF flag
-    _CrtSetDbgFlag(old_crtdbg_flag_);
-  }
-
- private:
-  int old_crtdbg_flag_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MemoryIsNotDeallocated);
-};
-#endif  // _MSC_VER
-
-}  // namespace
-
-// Initializes owner_thread_id_ and critical_section_ in static mutexes.
-void Mutex::ThreadSafeLazyInit() {
-  // Dynamic mutexes are initialized in the constructor.
-  if (type_ == kStatic) {
-    switch (
-        ::InterlockedCompareExchange(&critical_section_init_phase_, 1L, 0L)) {
-      case 0:
-        // If critical_section_init_phase_ was 0 before the exchange, we
-        // are the first to test it and need to perform the initialization.
-        owner_thread_id_ = 0;
-        {
-          // Use RAII to flag that following mem alloc is never deallocated.
-#ifdef _MSC_VER
-          MemoryIsNotDeallocated memory_is_not_deallocated;
-#endif  // _MSC_VER
-          critical_section_ = new CRITICAL_SECTION;
-        }
-        ::InitializeCriticalSection(critical_section_);
-        // Updates the critical_section_init_phase_ to 2 to signal
-        // initialization complete.
-        GTEST_CHECK_(::InterlockedCompareExchange(
-                          &critical_section_init_phase_, 2L, 1L) ==
-                      1L);
-        break;
-      case 1:
-        // Somebody else is already initializing the mutex; spin until they
-        // are done.
-        while (::InterlockedCompareExchange(&critical_section_init_phase_,
-                                            2L,
-                                            2L) != 2L) {
-          // Possibly yields the rest of the thread's time slice to other
-          // threads.
-          ::Sleep(0);
-        }
-        break;
-
-      case 2:
-        break;  // The mutex is already initialized and ready for use.
-
-      default:
-        GTEST_CHECK_(false)
-            << "Unexpected value of critical_section_init_phase_ "
-            << "while initializing a static mutex.";
-    }
-  }
-}
-
-namespace {
-
-class ThreadWithParamSupport : public ThreadWithParamBase {
- public:
-  static HANDLE CreateThread(Runnable* runnable,
-                             Notification* thread_can_start) {
-    ThreadMainParam* param = new ThreadMainParam(runnable, thread_can_start);
-    DWORD thread_id;
-    HANDLE thread_handle = ::CreateThread(
-        nullptr,  // Default security.
-        0,        // Default stack size.
-        &ThreadWithParamSupport::ThreadMain,
-        param,        // Parameter to ThreadMainStatic
-        0x0,          // Default creation flags.
-        &thread_id);  // Need a valid pointer for the call to work under Win98.
-    GTEST_CHECK_(thread_handle != nullptr)
-        << "CreateThread failed with error " << ::GetLastError() << ".";
-    if (thread_handle == nullptr) {
-      delete param;
-    }
-    return thread_handle;
-  }
-
- private:
-  struct ThreadMainParam {
-    ThreadMainParam(Runnable* runnable, Notification* thread_can_start)
-        : runnable_(runnable),
-          thread_can_start_(thread_can_start) {
-    }
-    std::unique_ptr<Runnable> runnable_;
-    // Does not own.
-    Notification* thread_can_start_;
-  };
-
-  static DWORD WINAPI ThreadMain(void* ptr) {
-    // Transfers ownership.
-    std::unique_ptr<ThreadMainParam> param(static_cast<ThreadMainParam*>(ptr));
-    if (param->thread_can_start_ != nullptr)
-      param->thread_can_start_->WaitForNotification();
-    param->runnable_->Run();
-    return 0;
-  }
-
-  // Prohibit instantiation.
-  ThreadWithParamSupport();
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParamSupport);
-};
-
-}  // namespace
-
-ThreadWithParamBase::ThreadWithParamBase(Runnable *runnable,
-                                         Notification* thread_can_start)
-      : thread_(ThreadWithParamSupport::CreateThread(runnable,
-                                                     thread_can_start)) {
-}
-
-ThreadWithParamBase::~ThreadWithParamBase() {
-  Join();
-}
-
-void ThreadWithParamBase::Join() {
-  GTEST_CHECK_(::WaitForSingleObject(thread_.Get(), INFINITE) == WAIT_OBJECT_0)
-      << "Failed to join the thread with error " << ::GetLastError() << ".";
-}
-
-// Maps a thread to a set of ThreadIdToThreadLocals that have values
-// instantiated on that thread and notifies them when the thread exits.  A
-// ThreadLocal instance is expected to persist until all threads it has
-// values on have terminated.
-class ThreadLocalRegistryImpl {
- public:
-  // Registers thread_local_instance as having value on the current thread.
-  // Returns a value that can be used to identify the thread from other threads.
-  static ThreadLocalValueHolderBase* GetValueOnCurrentThread(
-      const ThreadLocalBase* thread_local_instance) {
-#ifdef _MSC_VER
-    MemoryIsNotDeallocated memory_is_not_deallocated;
-#endif  // _MSC_VER
-    DWORD current_thread = ::GetCurrentThreadId();
-    MutexLock lock(&mutex_);
-    ThreadIdToThreadLocals* const thread_to_thread_locals =
-        GetThreadLocalsMapLocked();
-    ThreadIdToThreadLocals::iterator thread_local_pos =
-        thread_to_thread_locals->find(current_thread);
-    if (thread_local_pos == thread_to_thread_locals->end()) {
-      thread_local_pos = thread_to_thread_locals->insert(
-          std::make_pair(current_thread, ThreadLocalValues())).first;
-      StartWatcherThreadFor(current_thread);
-    }
-    ThreadLocalValues& thread_local_values = thread_local_pos->second;
-    ThreadLocalValues::iterator value_pos =
-        thread_local_values.find(thread_local_instance);
-    if (value_pos == thread_local_values.end()) {
-      value_pos =
-          thread_local_values
-              .insert(std::make_pair(
-                  thread_local_instance,
-                  std::shared_ptr<ThreadLocalValueHolderBase>(
-                      thread_local_instance->NewValueForCurrentThread())))
-              .first;
-    }
-    return value_pos->second.get();
-  }
-
-  static void OnThreadLocalDestroyed(
-      const ThreadLocalBase* thread_local_instance) {
-    std::vector<std::shared_ptr<ThreadLocalValueHolderBase> > value_holders;
-    // Clean up the ThreadLocalValues data structure while holding the lock, but
-    // defer the destruction of the ThreadLocalValueHolderBases.
-    {
-      MutexLock lock(&mutex_);
-      ThreadIdToThreadLocals* const thread_to_thread_locals =
-          GetThreadLocalsMapLocked();
-      for (ThreadIdToThreadLocals::iterator it =
-          thread_to_thread_locals->begin();
-          it != thread_to_thread_locals->end();
-          ++it) {
-        ThreadLocalValues& thread_local_values = it->second;
-        ThreadLocalValues::iterator value_pos =
-            thread_local_values.find(thread_local_instance);
-        if (value_pos != thread_local_values.end()) {
-          value_holders.push_back(value_pos->second);
-          thread_local_values.erase(value_pos);
-          // This 'if' can only be successful at most once, so theoretically we
-          // could break out of the loop here, but we don't bother doing so.
-        }
-      }
-    }
-    // Outside the lock, let the destructor for 'value_holders' deallocate the
-    // ThreadLocalValueHolderBases.
-  }
-
-  static void OnThreadExit(DWORD thread_id) {
-    GTEST_CHECK_(thread_id != 0) << ::GetLastError();
-    std::vector<std::shared_ptr<ThreadLocalValueHolderBase> > value_holders;
-    // Clean up the ThreadIdToThreadLocals data structure while holding the
-    // lock, but defer the destruction of the ThreadLocalValueHolderBases.
-    {
-      MutexLock lock(&mutex_);
-      ThreadIdToThreadLocals* const thread_to_thread_locals =
-          GetThreadLocalsMapLocked();
-      ThreadIdToThreadLocals::iterator thread_local_pos =
-          thread_to_thread_locals->find(thread_id);
-      if (thread_local_pos != thread_to_thread_locals->end()) {
-        ThreadLocalValues& thread_local_values = thread_local_pos->second;
-        for (ThreadLocalValues::iterator value_pos =
-            thread_local_values.begin();
-            value_pos != thread_local_values.end();
-            ++value_pos) {
-          value_holders.push_back(value_pos->second);
-        }
-        thread_to_thread_locals->erase(thread_local_pos);
-      }
-    }
-    // Outside the lock, let the destructor for 'value_holders' deallocate the
-    // ThreadLocalValueHolderBases.
-  }
-
- private:
-  // In a particular thread, maps a ThreadLocal object to its value.
-  typedef std::map<const ThreadLocalBase*,
-                   std::shared_ptr<ThreadLocalValueHolderBase> >
-      ThreadLocalValues;
-  // Stores all ThreadIdToThreadLocals having values in a thread, indexed by
-  // thread's ID.
-  typedef std::map<DWORD, ThreadLocalValues> ThreadIdToThreadLocals;
-
-  // Holds the thread id and thread handle that we pass from
-  // StartWatcherThreadFor to WatcherThreadFunc.
-  typedef std::pair<DWORD, HANDLE> ThreadIdAndHandle;
-
-  static void StartWatcherThreadFor(DWORD thread_id) {
-    // The returned handle will be kept in thread_map and closed by
-    // watcher_thread in WatcherThreadFunc.
-    HANDLE thread = ::OpenThread(SYNCHRONIZE | THREAD_QUERY_INFORMATION,
-                                 FALSE,
-                                 thread_id);
-    GTEST_CHECK_(thread != nullptr);
-    // We need to pass a valid thread ID pointer into CreateThread for it
-    // to work correctly under Win98.
-    DWORD watcher_thread_id;
-    HANDLE watcher_thread = ::CreateThread(
-        nullptr,  // Default security.
-        0,        // Default stack size
-        &ThreadLocalRegistryImpl::WatcherThreadFunc,
-        reinterpret_cast<LPVOID>(new ThreadIdAndHandle(thread_id, thread)),
-        CREATE_SUSPENDED, &watcher_thread_id);
-    GTEST_CHECK_(watcher_thread != nullptr);
-    // Give the watcher thread the same priority as ours to avoid being
-    // blocked by it.
-    ::SetThreadPriority(watcher_thread,
-                        ::GetThreadPriority(::GetCurrentThread()));
-    ::ResumeThread(watcher_thread);
-    ::CloseHandle(watcher_thread);
-  }
-
-  // Monitors exit from a given thread and notifies those
-  // ThreadIdToThreadLocals about thread termination.
-  static DWORD WINAPI WatcherThreadFunc(LPVOID param) {
-    const ThreadIdAndHandle* tah =
-        reinterpret_cast<const ThreadIdAndHandle*>(param);
-    GTEST_CHECK_(
-        ::WaitForSingleObject(tah->second, INFINITE) == WAIT_OBJECT_0);
-    OnThreadExit(tah->first);
-    ::CloseHandle(tah->second);
-    delete tah;
-    return 0;
-  }
-
-  // Returns map of thread local instances.
-  static ThreadIdToThreadLocals* GetThreadLocalsMapLocked() {
-    mutex_.AssertHeld();
-#ifdef _MSC_VER
-    MemoryIsNotDeallocated memory_is_not_deallocated;
-#endif  // _MSC_VER
-    static ThreadIdToThreadLocals* map = new ThreadIdToThreadLocals();
-    return map;
-  }
-
-  // Protects access to GetThreadLocalsMapLocked() and its return value.
-  static Mutex mutex_;
-  // Protects access to GetThreadMapLocked() and its return value.
-  static Mutex thread_map_mutex_;
-};
-
-Mutex ThreadLocalRegistryImpl::mutex_(Mutex::kStaticMutex);
-Mutex ThreadLocalRegistryImpl::thread_map_mutex_(Mutex::kStaticMutex);
-
-ThreadLocalValueHolderBase* ThreadLocalRegistry::GetValueOnCurrentThread(
-      const ThreadLocalBase* thread_local_instance) {
-  return ThreadLocalRegistryImpl::GetValueOnCurrentThread(
-      thread_local_instance);
-}
-
-void ThreadLocalRegistry::OnThreadLocalDestroyed(
-      const ThreadLocalBase* thread_local_instance) {
-  ThreadLocalRegistryImpl::OnThreadLocalDestroyed(thread_local_instance);
-}
-
-#endif  // GTEST_IS_THREADSAFE && GTEST_OS_WINDOWS
-
-#if GTEST_USES_POSIX_RE
-
-// Implements RE.  Currently only needed for death tests.
-
-RE::~RE() {
-  if (is_valid_) {
-    // regfree'ing an invalid regex might crash because the content
-    // of the regex is undefined. Since the regex's are essentially
-    // the same, one cannot be valid (or invalid) without the other
-    // being so too.
-    regfree(&partial_regex_);
-    regfree(&full_regex_);
-  }
-  free(const_cast<char*>(pattern_));
-}
-
-// Returns true if and only if regular expression re matches the entire str.
-bool RE::FullMatch(const char* str, const RE& re) {
-  if (!re.is_valid_) return false;
-
-  regmatch_t match;
-  return regexec(&re.full_regex_, str, 1, &match, 0) == 0;
-}
-
-// Returns true if and only if regular expression re matches a substring of
-// str (including str itself).
-bool RE::PartialMatch(const char* str, const RE& re) {
-  if (!re.is_valid_) return false;
-
-  regmatch_t match;
-  return regexec(&re.partial_regex_, str, 1, &match, 0) == 0;
-}
-
-// Initializes an RE from its string representation.
-void RE::Init(const char* regex) {
-  pattern_ = posix::StrDup(regex);
-
-  // Reserves enough bytes to hold the regular expression used for a
-  // full match.
-  const size_t full_regex_len = strlen(regex) + 10;
-  char* const full_pattern = new char[full_regex_len];
-
-  snprintf(full_pattern, full_regex_len, "^(%s)$", regex);
-  is_valid_ = regcomp(&full_regex_, full_pattern, REG_EXTENDED) == 0;
-  // We want to call regcomp(&partial_regex_, ...) even if the
-  // previous expression returns false.  Otherwise partial_regex_ may
-  // not be properly initialized can may cause trouble when it's
-  // freed.
-  //
-  // Some implementation of POSIX regex (e.g. on at least some
-  // versions of Cygwin) doesn't accept the empty string as a valid
-  // regex.  We change it to an equivalent form "()" to be safe.
-  if (is_valid_) {
-    const char* const partial_regex = (*regex == '\0') ? "()" : regex;
-    is_valid_ = regcomp(&partial_regex_, partial_regex, REG_EXTENDED) == 0;
-  }
-  EXPECT_TRUE(is_valid_)
-      << "Regular expression \"" << regex
-      << "\" is not a valid POSIX Extended regular expression.";
-
-  delete[] full_pattern;
-}
-
-#elif GTEST_USES_SIMPLE_RE
-
-// Returns true if and only if ch appears anywhere in str (excluding the
-// terminating '\0' character).
-bool IsInSet(char ch, const char* str) {
-  return ch != '\0' && strchr(str, ch) != nullptr;
-}
-
-// Returns true if and only if ch belongs to the given classification.
-// Unlike similar functions in <ctype.h>, these aren't affected by the
-// current locale.
-bool IsAsciiDigit(char ch) { return '0' <= ch && ch <= '9'; }
-bool IsAsciiPunct(char ch) {
-  return IsInSet(ch, "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~");
-}
-bool IsRepeat(char ch) { return IsInSet(ch, "?*+"); }
-bool IsAsciiWhiteSpace(char ch) { return IsInSet(ch, " \f\n\r\t\v"); }
-bool IsAsciiWordChar(char ch) {
-  return ('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z') ||
-      ('0' <= ch && ch <= '9') || ch == '_';
-}
-
-// Returns true if and only if "\\c" is a supported escape sequence.
-bool IsValidEscape(char c) {
-  return (IsAsciiPunct(c) || IsInSet(c, "dDfnrsStvwW"));
-}
-
-// Returns true if and only if the given atom (specified by escaped and
-// pattern) matches ch.  The result is undefined if the atom is invalid.
-bool AtomMatchesChar(bool escaped, char pattern_char, char ch) {
-  if (escaped) {  // "\\p" where p is pattern_char.
-    switch (pattern_char) {
-      case 'd': return IsAsciiDigit(ch);
-      case 'D': return !IsAsciiDigit(ch);
-      case 'f': return ch == '\f';
-      case 'n': return ch == '\n';
-      case 'r': return ch == '\r';
-      case 's': return IsAsciiWhiteSpace(ch);
-      case 'S': return !IsAsciiWhiteSpace(ch);
-      case 't': return ch == '\t';
-      case 'v': return ch == '\v';
-      case 'w': return IsAsciiWordChar(ch);
-      case 'W': return !IsAsciiWordChar(ch);
-    }
-    return IsAsciiPunct(pattern_char) && pattern_char == ch;
-  }
-
-  return (pattern_char == '.' && ch != '\n') || pattern_char == ch;
-}
-
-// Helper function used by ValidateRegex() to format error messages.
-static std::string FormatRegexSyntaxError(const char* regex, int index) {
-  return (Message() << "Syntax error at index " << index
-          << " in simple regular expression \"" << regex << "\": ").GetString();
-}
-
-// Generates non-fatal failures and returns false if regex is invalid;
-// otherwise returns true.
-bool ValidateRegex(const char* regex) {
-  if (regex == nullptr) {
-    ADD_FAILURE() << "NULL is not a valid simple regular expression.";
-    return false;
-  }
-
-  bool is_valid = true;
-
-  // True if and only if ?, *, or + can follow the previous atom.
-  bool prev_repeatable = false;
-  for (int i = 0; regex[i]; i++) {
-    if (regex[i] == '\\') {  // An escape sequence
-      i++;
-      if (regex[i] == '\0') {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
-                      << "'\\' cannot appear at the end.";
-        return false;
-      }
-
-      if (!IsValidEscape(regex[i])) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
-                      << "invalid escape sequence \"\\" << regex[i] << "\".";
-        is_valid = false;
-      }
-      prev_repeatable = true;
-    } else {  // Not an escape sequence.
-      const char ch = regex[i];
-
-      if (ch == '^' && i > 0) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'^' can only appear at the beginning.";
-        is_valid = false;
-      } else if (ch == '$' && regex[i + 1] != '\0') {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'$' can only appear at the end.";
-        is_valid = false;
-      } else if (IsInSet(ch, "()[]{}|")) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'" << ch << "' is unsupported.";
-        is_valid = false;
-      } else if (IsRepeat(ch) && !prev_repeatable) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'" << ch << "' can only follow a repeatable token.";
-        is_valid = false;
-      }
-
-      prev_repeatable = !IsInSet(ch, "^$?*+");
-    }
-  }
-
-  return is_valid;
-}
-
-// Matches a repeated regex atom followed by a valid simple regular
-// expression.  The regex atom is defined as c if escaped is false,
-// or \c otherwise.  repeat is the repetition meta character (?, *,
-// or +).  The behavior is undefined if str contains too many
-// characters to be indexable by size_t, in which case the test will
-// probably time out anyway.  We are fine with this limitation as
-// std::string has it too.
-bool MatchRepetitionAndRegexAtHead(
-    bool escaped, char c, char repeat, const char* regex,
-    const char* str) {
-  const size_t min_count = (repeat == '+') ? 1 : 0;
-  const size_t max_count = (repeat == '?') ? 1 :
-      static_cast<size_t>(-1) - 1;
-  // We cannot call numeric_limits::max() as it conflicts with the
-  // max() macro on Windows.
-
-  for (size_t i = 0; i <= max_count; ++i) {
-    // We know that the atom matches each of the first i characters in str.
-    if (i >= min_count && MatchRegexAtHead(regex, str + i)) {
-      // We have enough matches at the head, and the tail matches too.
-      // Since we only care about *whether* the pattern matches str
-      // (as opposed to *how* it matches), there is no need to find a
-      // greedy match.
-      return true;
-    }
-    if (str[i] == '\0' || !AtomMatchesChar(escaped, c, str[i]))
-      return false;
-  }
-  return false;
-}
-
-// Returns true if and only if regex matches a prefix of str. regex must
-// be a valid simple regular expression and not start with "^", or the
-// result is undefined.
-bool MatchRegexAtHead(const char* regex, const char* str) {
-  if (*regex == '\0')  // An empty regex matches a prefix of anything.
-    return true;
-
-  // "$" only matches the end of a string.  Note that regex being
-  // valid guarantees that there's nothing after "$" in it.
-  if (*regex == '$')
-    return *str == '\0';
-
-  // Is the first thing in regex an escape sequence?
-  const bool escaped = *regex == '\\';
-  if (escaped)
-    ++regex;
-  if (IsRepeat(regex[1])) {
-    // MatchRepetitionAndRegexAtHead() calls MatchRegexAtHead(), so
-    // here's an indirect recursion.  It terminates as the regex gets
-    // shorter in each recursion.
-    return MatchRepetitionAndRegexAtHead(
-        escaped, regex[0], regex[1], regex + 2, str);
-  } else {
-    // regex isn't empty, isn't "$", and doesn't start with a
-    // repetition.  We match the first atom of regex with the first
-    // character of str and recurse.
-    return (*str != '\0') && AtomMatchesChar(escaped, *regex, *str) &&
-        MatchRegexAtHead(regex + 1, str + 1);
-  }
-}
-
-// Returns true if and only if regex matches any substring of str.  regex must
-// be a valid simple regular expression, or the result is undefined.
-//
-// The algorithm is recursive, but the recursion depth doesn't exceed
-// the regex length, so we won't need to worry about running out of
-// stack space normally.  In rare cases the time complexity can be
-// exponential with respect to the regex length + the string length,
-// but usually it's must faster (often close to linear).
-bool MatchRegexAnywhere(const char* regex, const char* str) {
-  if (regex == nullptr || str == nullptr) return false;
-
-  if (*regex == '^')
-    return MatchRegexAtHead(regex + 1, str);
-
-  // A successful match can be anywhere in str.
-  do {
-    if (MatchRegexAtHead(regex, str))
-      return true;
-  } while (*str++ != '\0');
-  return false;
-}
-
-// Implements the RE class.
-
-RE::~RE() {
-  free(const_cast<char*>(pattern_));
-  free(const_cast<char*>(full_pattern_));
-}
-
-// Returns true if and only if regular expression re matches the entire str.
-bool RE::FullMatch(const char* str, const RE& re) {
-  return re.is_valid_ && MatchRegexAnywhere(re.full_pattern_, str);
-}
-
-// Returns true if and only if regular expression re matches a substring of
-// str (including str itself).
-bool RE::PartialMatch(const char* str, const RE& re) {
-  return re.is_valid_ && MatchRegexAnywhere(re.pattern_, str);
-}
-
-// Initializes an RE from its string representation.
-void RE::Init(const char* regex) {
-  pattern_ = full_pattern_ = nullptr;
-  if (regex != nullptr) {
-    pattern_ = posix::StrDup(regex);
-  }
-
-  is_valid_ = ValidateRegex(regex);
-  if (!is_valid_) {
-    // No need to calculate the full pattern when the regex is invalid.
-    return;
-  }
-
-  const size_t len = strlen(regex);
-  // Reserves enough bytes to hold the regular expression used for a
-  // full match: we need space to prepend a '^', append a '$', and
-  // terminate the string with '\0'.
-  char* buffer = static_cast<char*>(malloc(len + 3));
-  full_pattern_ = buffer;
-
-  if (*regex != '^')
-    *buffer++ = '^';  // Makes sure full_pattern_ starts with '^'.
-
-  // We don't use snprintf or strncpy, as they trigger a warning when
-  // compiled with VC++ 8.0.
-  memcpy(buffer, regex, len);
-  buffer += len;
-
-  if (len == 0 || regex[len - 1] != '$')
-    *buffer++ = '$';  // Makes sure full_pattern_ ends with '$'.
-
-  *buffer = '\0';
-}
-
-#endif  // GTEST_USES_POSIX_RE
-
-const char kUnknownFile[] = "unknown file";
-
-// Formats a source file path and a line number as they would appear
-// in an error message from the compiler used to compile this code.
-GTEST_API_ ::std::string FormatFileLocation(const char* file, int line) {
-  const std::string file_name(file == nullptr ? kUnknownFile : file);
-
-  if (line < 0) {
-    return file_name + ":";
-  }
-#ifdef _MSC_VER
-  return file_name + "(" + StreamableToString(line) + "):";
-#else
-  return file_name + ":" + StreamableToString(line) + ":";
-#endif  // _MSC_VER
-}
-
-// Formats a file location for compiler-independent XML output.
-// Although this function is not platform dependent, we put it next to
-// FormatFileLocation in order to contrast the two functions.
-// Note that FormatCompilerIndependentFileLocation() does NOT append colon
-// to the file location it produces, unlike FormatFileLocation().
-GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(
-    const char* file, int line) {
-  const std::string file_name(file == nullptr ? kUnknownFile : file);
-
-  if (line < 0)
-    return file_name;
-  else
-    return file_name + ":" + StreamableToString(line);
-}
-
-GTestLog::GTestLog(GTestLogSeverity severity, const char* file, int line)
-    : severity_(severity) {
-  const char* const marker =
-      severity == GTEST_INFO ?    "[  INFO ]" :
-      severity == GTEST_WARNING ? "[WARNING]" :
-      severity == GTEST_ERROR ?   "[ ERROR ]" : "[ FATAL ]";
-  GetStream() << ::std::endl << marker << " "
-              << FormatFileLocation(file, line).c_str() << ": ";
-}
-
-// Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
-GTestLog::~GTestLog() {
-  GetStream() << ::std::endl;
-  if (severity_ == GTEST_FATAL) {
-    fflush(stderr);
-    posix::Abort();
-  }
-}
-
-// Disable Microsoft deprecation warnings for POSIX functions called from
-// this class (creat, dup, dup2, and close)
-GTEST_DISABLE_MSC_DEPRECATED_PUSH_()
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Object that captures an output stream (stdout/stderr).
-class CapturedStream {
- public:
-  // The ctor redirects the stream to a temporary file.
-  explicit CapturedStream(int fd) : fd_(fd), uncaptured_fd_(dup(fd)) {
-# if GTEST_OS_WINDOWS
-    char temp_dir_path[MAX_PATH + 1] = { '\0' };  // NOLINT
-    char temp_file_path[MAX_PATH + 1] = { '\0' };  // NOLINT
-
-    ::GetTempPathA(sizeof(temp_dir_path), temp_dir_path);
-    const UINT success = ::GetTempFileNameA(temp_dir_path,
-                                            "gtest_redir",
-                                            0,  // Generate unique file name.
-                                            temp_file_path);
-    GTEST_CHECK_(success != 0)
-        << "Unable to create a temporary file in " << temp_dir_path;
-    const int captured_fd = creat(temp_file_path, _S_IREAD | _S_IWRITE);
-    GTEST_CHECK_(captured_fd != -1) << "Unable to open temporary file "
-                                    << temp_file_path;
-    filename_ = temp_file_path;
-# else
-    // There's no guarantee that a test has write access to the current
-    // directory, so we create the temporary file in the /tmp directory
-    // instead. We use /tmp on most systems, and /sdcard on Android.
-    // That's because Android doesn't have /tmp.
-#  if GTEST_OS_LINUX_ANDROID
-    // Note: Android applications are expected to call the framework's
-    // Context.getExternalStorageDirectory() method through JNI to get
-    // the location of the world-writable SD Card directory. However,
-    // this requires a Context handle, which cannot be retrieved
-    // globally from native code. Doing so also precludes running the
-    // code as part of a regular standalone executable, which doesn't
-    // run in a Dalvik process (e.g. when running it through 'adb shell').
-    //
-    // The location /data/local/tmp is directly accessible from native code.
-    // '/sdcard' and other variants cannot be relied on, as they are not
-    // guaranteed to be mounted, or may have a delay in mounting.
-    char name_template[] = "/data/local/tmp/gtest_captured_stream.XXXXXX";
-#  else
-    char name_template[] = "/tmp/captured_stream.XXXXXX";
-#  endif  // GTEST_OS_LINUX_ANDROID
-    const int captured_fd = mkstemp(name_template);
-    if (captured_fd == -1) {
-      GTEST_LOG_(WARNING)
-          << "Failed to create tmp file " << name_template
-          << " for test; does the test have access to the /tmp directory?";
-    }
-    filename_ = name_template;
-# endif  // GTEST_OS_WINDOWS
-    fflush(nullptr);
-    dup2(captured_fd, fd_);
-    close(captured_fd);
-  }
-
-  ~CapturedStream() {
-    remove(filename_.c_str());
-  }
-
-  std::string GetCapturedString() {
-    if (uncaptured_fd_ != -1) {
-      // Restores the original stream.
-      fflush(nullptr);
-      dup2(uncaptured_fd_, fd_);
-      close(uncaptured_fd_);
-      uncaptured_fd_ = -1;
-    }
-
-    FILE* const file = posix::FOpen(filename_.c_str(), "r");
-    if (file == nullptr) {
-      GTEST_LOG_(FATAL) << "Failed to open tmp file " << filename_
-                        << " for capturing stream.";
-    }
-    const std::string content = ReadEntireFile(file);
-    posix::FClose(file);
-    return content;
-  }
-
- private:
-  const int fd_;  // A stream to capture.
-  int uncaptured_fd_;
-  // Name of the temporary file holding the stderr output.
-  ::std::string filename_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(CapturedStream);
-};
-
-GTEST_DISABLE_MSC_DEPRECATED_POP_()
-
-static CapturedStream* g_captured_stderr = nullptr;
-static CapturedStream* g_captured_stdout = nullptr;
-
-// Starts capturing an output stream (stdout/stderr).
-static void CaptureStream(int fd, const char* stream_name,
-                          CapturedStream** stream) {
-  if (*stream != nullptr) {
-    GTEST_LOG_(FATAL) << "Only one " << stream_name
-                      << " capturer can exist at a time.";
-  }
-  *stream = new CapturedStream(fd);
-}
-
-// Stops capturing the output stream and returns the captured string.
-static std::string GetCapturedStream(CapturedStream** captured_stream) {
-  const std::string content = (*captured_stream)->GetCapturedString();
-
-  delete *captured_stream;
-  *captured_stream = nullptr;
-
-  return content;
-}
-
-// Starts capturing stdout.
-void CaptureStdout() {
-  CaptureStream(kStdOutFileno, "stdout", &g_captured_stdout);
-}
-
-// Starts capturing stderr.
-void CaptureStderr() {
-  CaptureStream(kStdErrFileno, "stderr", &g_captured_stderr);
-}
-
-// Stops capturing stdout and returns the captured string.
-std::string GetCapturedStdout() {
-  return GetCapturedStream(&g_captured_stdout);
-}
-
-// Stops capturing stderr and returns the captured string.
-std::string GetCapturedStderr() {
-  return GetCapturedStream(&g_captured_stderr);
-}
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-
-
-
-
-size_t GetFileSize(FILE* file) {
-  fseek(file, 0, SEEK_END);
-  return static_cast<size_t>(ftell(file));
-}
-
-std::string ReadEntireFile(FILE* file) {
-  const size_t file_size = GetFileSize(file);
-  char* const buffer = new char[file_size];
-
-  size_t bytes_last_read = 0;  // # of bytes read in the last fread()
-  size_t bytes_read = 0;       // # of bytes read so far
-
-  fseek(file, 0, SEEK_SET);
-
-  // Keeps reading the file until we cannot read further or the
-  // pre-determined file size is reached.
-  do {
-    bytes_last_read = fread(buffer+bytes_read, 1, file_size-bytes_read, file);
-    bytes_read += bytes_last_read;
-  } while (bytes_last_read > 0 && bytes_read < file_size);
-
-  const std::string content(buffer, bytes_read);
-  delete[] buffer;
-
-  return content;
-}
-
-#if GTEST_HAS_DEATH_TEST
-static const std::vector<std::string>* g_injected_test_argvs =
-    nullptr;  // Owned.
-
-std::vector<std::string> GetInjectableArgvs() {
-  if (g_injected_test_argvs != nullptr) {
-    return *g_injected_test_argvs;
-  }
-  return GetArgvs();
-}
-
-void SetInjectableArgvs(const std::vector<std::string>* new_argvs) {
-  if (g_injected_test_argvs != new_argvs) delete g_injected_test_argvs;
-  g_injected_test_argvs = new_argvs;
-}
-
-void SetInjectableArgvs(const std::vector<std::string>& new_argvs) {
-  SetInjectableArgvs(
-      new std::vector<std::string>(new_argvs.begin(), new_argvs.end()));
-}
-
-void ClearInjectableArgvs() {
-  delete g_injected_test_argvs;
-  g_injected_test_argvs = nullptr;
-}
-#endif  // GTEST_HAS_DEATH_TEST
-
-#if GTEST_OS_WINDOWS_MOBILE
-namespace posix {
-void Abort() {
-  DebugBreak();
-  TerminateProcess(GetCurrentProcess(), 1);
-}
-}  // namespace posix
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-// Returns the name of the environment variable corresponding to the
-// given flag.  For example, FlagToEnvVar("foo") will return
-// "GTEST_FOO" in the open-source version.
-static std::string FlagToEnvVar(const char* flag) {
-  const std::string full_flag =
-      (Message() << GTEST_FLAG_PREFIX_ << flag).GetString();
-
-  Message env_var;
-  for (size_t i = 0; i != full_flag.length(); i++) {
-    env_var << ToUpper(full_flag.c_str()[i]);
-  }
-
-  return env_var.GetString();
-}
-
-// Parses 'str' for a 32-bit signed integer.  If successful, writes
-// the result to *value and returns true; otherwise leaves *value
-// unchanged and returns false.
-bool ParseInt32(const Message& src_text, const char* str, int32_t* value) {
-  // Parses the environment variable as a decimal integer.
-  char* end = nullptr;
-  const long long_value = strtol(str, &end, 10);  // NOLINT
-
-  // Has strtol() consumed all characters in the string?
-  if (*end != '\0') {
-    // No - an invalid character was encountered.
-    Message msg;
-    msg << "WARNING: " << src_text
-        << " is expected to be a 32-bit integer, but actually"
-        << " has value \"" << str << "\".\n";
-    printf("%s", msg.GetString().c_str());
-    fflush(stdout);
-    return false;
-  }
-
-  // Is the parsed value in the range of an int32_t?
-  const auto result = static_cast<int32_t>(long_value);
-  if (long_value == LONG_MAX || long_value == LONG_MIN ||
-      // The parsed value overflows as a long.  (strtol() returns
-      // LONG_MAX or LONG_MIN when the input overflows.)
-      result != long_value
-      // The parsed value overflows as an int32_t.
-      ) {
-    Message msg;
-    msg << "WARNING: " << src_text
-        << " is expected to be a 32-bit integer, but actually"
-        << " has value " << str << ", which overflows.\n";
-    printf("%s", msg.GetString().c_str());
-    fflush(stdout);
-    return false;
-  }
-
-  *value = result;
-  return true;
-}
-
-// Reads and returns the Boolean environment variable corresponding to
-// the given flag; if it's not set, returns default_value.
-//
-// The value is considered true if and only if it's not "0".
-bool BoolFromGTestEnv(const char* flag, bool default_value) {
-#if defined(GTEST_GET_BOOL_FROM_ENV_)
-  return GTEST_GET_BOOL_FROM_ENV_(flag, default_value);
-#else
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const string_value = posix::GetEnv(env_var.c_str());
-  return string_value == nullptr ? default_value
-                                 : strcmp(string_value, "0") != 0;
-#endif  // defined(GTEST_GET_BOOL_FROM_ENV_)
-}
-
-// Reads and returns a 32-bit integer stored in the environment
-// variable corresponding to the given flag; if it isn't set or
-// doesn't represent a valid 32-bit integer, returns default_value.
-int32_t Int32FromGTestEnv(const char* flag, int32_t default_value) {
-#if defined(GTEST_GET_INT32_FROM_ENV_)
-  return GTEST_GET_INT32_FROM_ENV_(flag, default_value);
-#else
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const string_value = posix::GetEnv(env_var.c_str());
-  if (string_value == nullptr) {
-    // The environment variable is not set.
-    return default_value;
-  }
-
-  int32_t result = default_value;
-  if (!ParseInt32(Message() << "Environment variable " << env_var,
-                  string_value, &result)) {
-    printf("The default value %s is used.\n",
-           (Message() << default_value).GetString().c_str());
-    fflush(stdout);
-    return default_value;
-  }
-
-  return result;
-#endif  // defined(GTEST_GET_INT32_FROM_ENV_)
-}
-
-// As a special case for the 'output' flag, if GTEST_OUTPUT is not
-// set, we look for XML_OUTPUT_FILE, which is set by the Bazel build
-// system.  The value of XML_OUTPUT_FILE is a filename without the
-// "xml:" prefix of GTEST_OUTPUT.
-// Note that this is meant to be called at the call site so it does
-// not check that the flag is 'output'
-// In essence this checks an env variable called XML_OUTPUT_FILE
-// and if it is set we prepend "xml:" to its value, if it not set we return ""
-std::string OutputFlagAlsoCheckEnvVar(){
-  std::string default_value_for_output_flag = "";
-  const char* xml_output_file_env = posix::GetEnv("XML_OUTPUT_FILE");
-  if (nullptr != xml_output_file_env) {
-    default_value_for_output_flag = std::string("xml:") + xml_output_file_env;
-  }
-  return default_value_for_output_flag;
-}
-
-// Reads and returns the string environment variable corresponding to
-// the given flag; if it's not set, returns default_value.
-const char* StringFromGTestEnv(const char* flag, const char* default_value) {
-#if defined(GTEST_GET_STRING_FROM_ENV_)
-  return GTEST_GET_STRING_FROM_ENV_(flag, default_value);
-#else
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const value = posix::GetEnv(env_var.c_str());
-  return value == nullptr ? default_value : value;
-#endif  // defined(GTEST_GET_STRING_FROM_ENV_)
-}
-
-}  // namespace internal
-}  // namespace testing
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Test - The Google C++ Testing and Mocking Framework
-//
-// This file implements a universal value printer that can print a
-// value of any type T:
-//
-//   void ::testing::internal::UniversalPrinter<T>::Print(value, ostream_ptr);
-//
-// It uses the << operator when possible, and prints the bytes in the
-// object otherwise.  A user can override its behavior for a class
-// type Foo by defining either operator<<(::std::ostream&, const Foo&)
-// or void PrintTo(const Foo&, ::std::ostream*) in the namespace that
-// defines Foo.
-
-
-#include <stdio.h>
-
-#include <cctype>
-#include <cstdint>
-#include <cwchar>
-#include <ostream>  // NOLINT
-#include <string>
-#include <type_traits>
-
-
-namespace testing {
-
-namespace {
-
-using ::std::ostream;
-
-// Prints a segment of bytes in the given object.
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-void PrintByteSegmentInObjectTo(const unsigned char* obj_bytes, size_t start,
-                                size_t count, ostream* os) {
-  char text[5] = "";
-  for (size_t i = 0; i != count; i++) {
-    const size_t j = start + i;
-    if (i != 0) {
-      // Organizes the bytes into groups of 2 for easy parsing by
-      // human.
-      if ((j % 2) == 0)
-        *os << ' ';
-      else
-        *os << '-';
-    }
-    GTEST_SNPRINTF_(text, sizeof(text), "%02X", obj_bytes[j]);
-    *os << text;
-  }
-}
-
-// Prints the bytes in the given value to the given ostream.
-void PrintBytesInObjectToImpl(const unsigned char* obj_bytes, size_t count,
-                              ostream* os) {
-  // Tells the user how big the object is.
-  *os << count << "-byte object <";
-
-  const size_t kThreshold = 132;
-  const size_t kChunkSize = 64;
-  // If the object size is bigger than kThreshold, we'll have to omit
-  // some details by printing only the first and the last kChunkSize
-  // bytes.
-  if (count < kThreshold) {
-    PrintByteSegmentInObjectTo(obj_bytes, 0, count, os);
-  } else {
-    PrintByteSegmentInObjectTo(obj_bytes, 0, kChunkSize, os);
-    *os << " ... ";
-    // Rounds up to 2-byte boundary.
-    const size_t resume_pos = (count - kChunkSize + 1)/2*2;
-    PrintByteSegmentInObjectTo(obj_bytes, resume_pos, count - resume_pos, os);
-  }
-  *os << ">";
-}
-
-// Helpers for widening a character to char32_t. Since the standard does not
-// specify if char / wchar_t is signed or unsigned, it is important to first
-// convert it to the unsigned type of the same width before widening it to
-// char32_t.
-template <typename CharType>
-char32_t ToChar32(CharType in) {
-  return static_cast<char32_t>(
-      static_cast<typename std::make_unsigned<CharType>::type>(in));
-}
-
-}  // namespace
-
-namespace internal {
-
-// Delegates to PrintBytesInObjectToImpl() to print the bytes in the
-// given object.  The delegation simplifies the implementation, which
-// uses the << operator and thus is easier done outside of the
-// ::testing::internal namespace, which contains a << operator that
-// sometimes conflicts with the one in STL.
-void PrintBytesInObjectTo(const unsigned char* obj_bytes, size_t count,
-                          ostream* os) {
-  PrintBytesInObjectToImpl(obj_bytes, count, os);
-}
-
-// Depending on the value of a char (or wchar_t), we print it in one
-// of three formats:
-//   - as is if it's a printable ASCII (e.g. 'a', '2', ' '),
-//   - as a hexadecimal escape sequence (e.g. '\x7F'), or
-//   - as a special escape sequence (e.g. '\r', '\n').
-enum CharFormat {
-  kAsIs,
-  kHexEscape,
-  kSpecialEscape
-};
-
-// Returns true if c is a printable ASCII character.  We test the
-// value of c directly instead of calling isprint(), which is buggy on
-// Windows Mobile.
-inline bool IsPrintableAscii(char32_t c) { return 0x20 <= c && c <= 0x7E; }
-
-// Prints c (of type char, char8_t, char16_t, char32_t, or wchar_t) as a
-// character literal without the quotes, escaping it when necessary; returns how
-// c was formatted.
-template <typename Char>
-static CharFormat PrintAsCharLiteralTo(Char c, ostream* os) {
-  const char32_t u_c = ToChar32(c);
-  switch (u_c) {
-    case L'\0':
-      *os << "\\0";
-      break;
-    case L'\'':
-      *os << "\\'";
-      break;
-    case L'\\':
-      *os << "\\\\";
-      break;
-    case L'\a':
-      *os << "\\a";
-      break;
-    case L'\b':
-      *os << "\\b";
-      break;
-    case L'\f':
-      *os << "\\f";
-      break;
-    case L'\n':
-      *os << "\\n";
-      break;
-    case L'\r':
-      *os << "\\r";
-      break;
-    case L'\t':
-      *os << "\\t";
-      break;
-    case L'\v':
-      *os << "\\v";
-      break;
-    default:
-      if (IsPrintableAscii(u_c)) {
-        *os << static_cast<char>(c);
-        return kAsIs;
-      } else {
-        ostream::fmtflags flags = os->flags();
-        *os << "\\x" << std::hex << std::uppercase << static_cast<int>(u_c);
-        os->flags(flags);
-        return kHexEscape;
-      }
-  }
-  return kSpecialEscape;
-}
-
-// Prints a char32_t c as if it's part of a string literal, escaping it when
-// necessary; returns how c was formatted.
-static CharFormat PrintAsStringLiteralTo(char32_t c, ostream* os) {
-  switch (c) {
-    case L'\'':
-      *os << "'";
-      return kAsIs;
-    case L'"':
-      *os << "\\\"";
-      return kSpecialEscape;
-    default:
-      return PrintAsCharLiteralTo(c, os);
-  }
-}
-
-static const char* GetCharWidthPrefix(char) {
-  return "";
-}
-
-static const char* GetCharWidthPrefix(signed char) {
-  return "";
-}
-
-static const char* GetCharWidthPrefix(unsigned char) {
-  return "";
-}
-
-#ifdef __cpp_char8_t
-static const char* GetCharWidthPrefix(char8_t) {
-  return "u8";
-}
-#endif
-
-static const char* GetCharWidthPrefix(char16_t) {
-  return "u";
-}
-
-static const char* GetCharWidthPrefix(char32_t) {
-  return "U";
-}
-
-static const char* GetCharWidthPrefix(wchar_t) {
-  return "L";
-}
-
-// Prints a char c as if it's part of a string literal, escaping it when
-// necessary; returns how c was formatted.
-static CharFormat PrintAsStringLiteralTo(char c, ostream* os) {
-  return PrintAsStringLiteralTo(ToChar32(c), os);
-}
-
-#ifdef __cpp_char8_t
-static CharFormat PrintAsStringLiteralTo(char8_t c, ostream* os) {
-  return PrintAsStringLiteralTo(ToChar32(c), os);
-}
-#endif
-
-static CharFormat PrintAsStringLiteralTo(char16_t c, ostream* os) {
-  return PrintAsStringLiteralTo(ToChar32(c), os);
-}
-
-static CharFormat PrintAsStringLiteralTo(wchar_t c, ostream* os) {
-  return PrintAsStringLiteralTo(ToChar32(c), os);
-}
-
-// Prints a character c (of type char, char8_t, char16_t, char32_t, or wchar_t)
-// and its code. '\0' is printed as "'\\0'", other unprintable characters are
-// also properly escaped using the standard C++ escape sequence.
-template <typename Char>
-void PrintCharAndCodeTo(Char c, ostream* os) {
-  // First, print c as a literal in the most readable form we can find.
-  *os << GetCharWidthPrefix(c) << "'";
-  const CharFormat format = PrintAsCharLiteralTo(c, os);
-  *os << "'";
-
-  // To aid user debugging, we also print c's code in decimal, unless
-  // it's 0 (in which case c was printed as '\\0', making the code
-  // obvious).
-  if (c == 0)
-    return;
-  *os << " (" << static_cast<int>(c);
-
-  // For more convenience, we print c's code again in hexadecimal,
-  // unless c was already printed in the form '\x##' or the code is in
-  // [1, 9].
-  if (format == kHexEscape || (1 <= c && c <= 9)) {
-    // Do nothing.
-  } else {
-    *os << ", 0x" << String::FormatHexInt(static_cast<int>(c));
-  }
-  *os << ")";
-}
-
-void PrintTo(unsigned char c, ::std::ostream* os) { PrintCharAndCodeTo(c, os); }
-void PrintTo(signed char c, ::std::ostream* os) { PrintCharAndCodeTo(c, os); }
-
-// Prints a wchar_t as a symbol if it is printable or as its internal
-// code otherwise and also as its code.  L'\0' is printed as "L'\\0'".
-void PrintTo(wchar_t wc, ostream* os) { PrintCharAndCodeTo(wc, os); }
-
-// TODO(dcheng): Consider making this delegate to PrintCharAndCodeTo() as well.
-void PrintTo(char32_t c, ::std::ostream* os) {
-  *os << std::hex << "U+" << std::uppercase << std::setfill('0') << std::setw(4)
-      << static_cast<uint32_t>(c);
-}
-
-// Prints the given array of characters to the ostream.  CharType must be either
-// char, char8_t, char16_t, char32_t, or wchar_t.
-// The array starts at begin, the length is len, it may include '\0' characters
-// and may not be NUL-terminated.
-template <typename CharType>
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-static CharFormat PrintCharsAsStringTo(
-    const CharType* begin, size_t len, ostream* os) {
-  const char* const quote_prefix = GetCharWidthPrefix(*begin);
-  *os << quote_prefix << "\"";
-  bool is_previous_hex = false;
-  CharFormat print_format = kAsIs;
-  for (size_t index = 0; index < len; ++index) {
-    const CharType cur = begin[index];
-    if (is_previous_hex && IsXDigit(cur)) {
-      // Previous character is of '\x..' form and this character can be
-      // interpreted as another hexadecimal digit in its number. Break string to
-      // disambiguate.
-      *os << "\" " << quote_prefix << "\"";
-    }
-    is_previous_hex = PrintAsStringLiteralTo(cur, os) == kHexEscape;
-    // Remember if any characters required hex escaping.
-    if (is_previous_hex) {
-      print_format = kHexEscape;
-    }
-  }
-  *os << "\"";
-  return print_format;
-}
-
-// Prints a (const) char/wchar_t array of 'len' elements, starting at address
-// 'begin'.  CharType must be either char or wchar_t.
-template <typename CharType>
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-static void UniversalPrintCharArray(
-    const CharType* begin, size_t len, ostream* os) {
-  // The code
-  //   const char kFoo[] = "foo";
-  // generates an array of 4, not 3, elements, with the last one being '\0'.
-  //
-  // Therefore when printing a char array, we don't print the last element if
-  // it's '\0', such that the output matches the string literal as it's
-  // written in the source code.
-  if (len > 0 && begin[len - 1] == '\0') {
-    PrintCharsAsStringTo(begin, len - 1, os);
-    return;
-  }
-
-  // If, however, the last element in the array is not '\0', e.g.
-  //    const char kFoo[] = { 'f', 'o', 'o' };
-  // we must print the entire array.  We also print a message to indicate
-  // that the array is not NUL-terminated.
-  PrintCharsAsStringTo(begin, len, os);
-  *os << " (no terminating NUL)";
-}
-
-// Prints a (const) char array of 'len' elements, starting at address 'begin'.
-void UniversalPrintArray(const char* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-
-#ifdef __cpp_char8_t
-// Prints a (const) char8_t array of 'len' elements, starting at address
-// 'begin'.
-void UniversalPrintArray(const char8_t* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-#endif
-
-// Prints a (const) char16_t array of 'len' elements, starting at address
-// 'begin'.
-void UniversalPrintArray(const char16_t* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-
-// Prints a (const) char32_t array of 'len' elements, starting at address
-// 'begin'.
-void UniversalPrintArray(const char32_t* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-
-// Prints a (const) wchar_t array of 'len' elements, starting at address
-// 'begin'.
-void UniversalPrintArray(const wchar_t* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-
-namespace {
-
-// Prints a null-terminated C-style string to the ostream.
-template <typename Char>
-void PrintCStringTo(const Char* s, ostream* os) {
-  if (s == nullptr) {
-    *os << "NULL";
-  } else {
-    *os << ImplicitCast_<const void*>(s) << " pointing to ";
-    PrintCharsAsStringTo(s, std::char_traits<Char>::length(s), os);
-  }
-}
-
-}  // anonymous namespace
-
-void PrintTo(const char* s, ostream* os) { PrintCStringTo(s, os); }
-
-#ifdef __cpp_char8_t
-void PrintTo(const char8_t* s, ostream* os) { PrintCStringTo(s, os); }
-#endif
-
-void PrintTo(const char16_t* s, ostream* os) { PrintCStringTo(s, os); }
-
-void PrintTo(const char32_t* s, ostream* os) { PrintCStringTo(s, os); }
-
-// MSVC compiler can be configured to define whar_t as a typedef
-// of unsigned short. Defining an overload for const wchar_t* in that case
-// would cause pointers to unsigned shorts be printed as wide strings,
-// possibly accessing more memory than intended and causing invalid
-// memory accesses. MSVC defines _NATIVE_WCHAR_T_DEFINED symbol when
-// wchar_t is implemented as a native type.
-#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
-// Prints the given wide C string to the ostream.
-void PrintTo(const wchar_t* s, ostream* os) { PrintCStringTo(s, os); }
-#endif  // wchar_t is native
-
-namespace {
-
-bool ContainsUnprintableControlCodes(const char* str, size_t length) {
-  const unsigned char *s = reinterpret_cast<const unsigned char *>(str);
-
-  for (size_t i = 0; i < length; i++) {
-    unsigned char ch = *s++;
-    if (std::iscntrl(ch)) {
-        switch (ch) {
-        case '\t':
-        case '\n':
-        case '\r':
-          break;
-        default:
-          return true;
-        }
-      }
-  }
-  return false;
-}
-
-bool IsUTF8TrailByte(unsigned char t) { return 0x80 <= t && t<= 0xbf; }
-
-bool IsValidUTF8(const char* str, size_t length) {
-  const unsigned char *s = reinterpret_cast<const unsigned char *>(str);
-
-  for (size_t i = 0; i < length;) {
-    unsigned char lead = s[i++];
-
-    if (lead <= 0x7f) {
-      continue;  // single-byte character (ASCII) 0..7F
-    }
-    if (lead < 0xc2) {
-      return false;  // trail byte or non-shortest form
-    } else if (lead <= 0xdf && (i + 1) <= length && IsUTF8TrailByte(s[i])) {
-      ++i;  // 2-byte character
-    } else if (0xe0 <= lead && lead <= 0xef && (i + 2) <= length &&
-               IsUTF8TrailByte(s[i]) &&
-               IsUTF8TrailByte(s[i + 1]) &&
-               // check for non-shortest form and surrogate
-               (lead != 0xe0 || s[i] >= 0xa0) &&
-               (lead != 0xed || s[i] < 0xa0)) {
-      i += 2;  // 3-byte character
-    } else if (0xf0 <= lead && lead <= 0xf4 && (i + 3) <= length &&
-               IsUTF8TrailByte(s[i]) &&
-               IsUTF8TrailByte(s[i + 1]) &&
-               IsUTF8TrailByte(s[i + 2]) &&
-               // check for non-shortest form
-               (lead != 0xf0 || s[i] >= 0x90) &&
-               (lead != 0xf4 || s[i] < 0x90)) {
-      i += 3;  // 4-byte character
-    } else {
-      return false;
-    }
-  }
-  return true;
-}
-
-void ConditionalPrintAsText(const char* str, size_t length, ostream* os) {
-  if (!ContainsUnprintableControlCodes(str, length) &&
-      IsValidUTF8(str, length)) {
-    *os << "\n    As Text: \"" << str << "\"";
-  }
-}
-
-}  // anonymous namespace
-
-void PrintStringTo(const ::std::string& s, ostream* os) {
-  if (PrintCharsAsStringTo(s.data(), s.size(), os) == kHexEscape) {
-    if (GTEST_FLAG(print_utf8)) {
-      ConditionalPrintAsText(s.data(), s.size(), os);
-    }
-  }
-}
-
-#ifdef __cpp_char8_t
-void PrintU8StringTo(const ::std::u8string& s, ostream* os) {
-  PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-#endif
-
-void PrintU16StringTo(const ::std::u16string& s, ostream* os) {
-  PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-
-void PrintU32StringTo(const ::std::u32string& s, ostream* os) {
-  PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-
-#if GTEST_HAS_STD_WSTRING
-void PrintWideStringTo(const ::std::wstring& s, ostream* os) {
-  PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-}  // namespace internal
-
-}  // namespace testing
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-
-
-
-namespace testing {
-
-using internal::GetUnitTestImpl;
-
-// Gets the summary of the failure message by omitting the stack trace
-// in it.
-std::string TestPartResult::ExtractSummary(const char* message) {
-  const char* const stack_trace = strstr(message, internal::kStackTraceMarker);
-  return stack_trace == nullptr ? message : std::string(message, stack_trace);
-}
-
-// Prints a TestPartResult object.
-std::ostream& operator<<(std::ostream& os, const TestPartResult& result) {
-  return os << internal::FormatFileLocation(result.file_name(),
-                                            result.line_number())
-            << " "
-            << (result.type() == TestPartResult::kSuccess
-                    ? "Success"
-                    : result.type() == TestPartResult::kSkip
-                          ? "Skipped"
-                          : result.type() == TestPartResult::kFatalFailure
-                                ? "Fatal failure"
-                                : "Non-fatal failure")
-            << ":\n"
-            << result.message() << std::endl;
-}
-
-// Appends a TestPartResult to the array.
-void TestPartResultArray::Append(const TestPartResult& result) {
-  array_.push_back(result);
-}
-
-// Returns the TestPartResult at the given index (0-based).
-const TestPartResult& TestPartResultArray::GetTestPartResult(int index) const {
-  if (index < 0 || index >= size()) {
-    printf("\nInvalid index (%d) into TestPartResultArray.\n", index);
-    internal::posix::Abort();
-  }
-
-  return array_[static_cast<size_t>(index)];
-}
-
-// Returns the number of TestPartResult objects in the array.
-int TestPartResultArray::size() const {
-  return static_cast<int>(array_.size());
-}
-
-namespace internal {
-
-HasNewFatalFailureHelper::HasNewFatalFailureHelper()
-    : has_new_fatal_failure_(false),
-      original_reporter_(GetUnitTestImpl()->
-                         GetTestPartResultReporterForCurrentThread()) {
-  GetUnitTestImpl()->SetTestPartResultReporterForCurrentThread(this);
-}
-
-HasNewFatalFailureHelper::~HasNewFatalFailureHelper() {
-  GetUnitTestImpl()->SetTestPartResultReporterForCurrentThread(
-      original_reporter_);
-}
-
-void HasNewFatalFailureHelper::ReportTestPartResult(
-    const TestPartResult& result) {
-  if (result.fatally_failed())
-    has_new_fatal_failure_ = true;
-  original_reporter_->ReportTestPartResult(result);
-}
-
-}  // namespace internal
-
-}  // namespace testing
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-
-
-namespace testing {
-namespace internal {
-
-// Skips to the first non-space char in str. Returns an empty string if str
-// contains only whitespace characters.
-static const char* SkipSpaces(const char* str) {
-  while (IsSpace(*str))
-    str++;
-  return str;
-}
-
-static std::vector<std::string> SplitIntoTestNames(const char* src) {
-  std::vector<std::string> name_vec;
-  src = SkipSpaces(src);
-  for (; src != nullptr; src = SkipComma(src)) {
-    name_vec.push_back(StripTrailingSpaces(GetPrefixUntilComma(src)));
-  }
-  return name_vec;
-}
-
-// Verifies that registered_tests match the test names in
-// registered_tests_; returns registered_tests if successful, or
-// aborts the program otherwise.
-const char* TypedTestSuitePState::VerifyRegisteredTestNames(
-    const char* test_suite_name, const char* file, int line,
-    const char* registered_tests) {
-  RegisterTypeParameterizedTestSuite(test_suite_name, CodeLocation(file, line));
-
-  typedef RegisteredTestsMap::const_iterator RegisteredTestIter;
-  registered_ = true;
-
-  std::vector<std::string> name_vec = SplitIntoTestNames(registered_tests);
-
-  Message errors;
-
-  std::set<std::string> tests;
-  for (std::vector<std::string>::const_iterator name_it = name_vec.begin();
-       name_it != name_vec.end(); ++name_it) {
-    const std::string& name = *name_it;
-    if (tests.count(name) != 0) {
-      errors << "Test " << name << " is listed more than once.\n";
-      continue;
-    }
-
-    if (registered_tests_.count(name) != 0) {
-      tests.insert(name);
-    } else {
-      errors << "No test named " << name
-             << " can be found in this test suite.\n";
-    }
-  }
-
-  for (RegisteredTestIter it = registered_tests_.begin();
-       it != registered_tests_.end();
-       ++it) {
-    if (tests.count(it->first) == 0) {
-      errors << "You forgot to list test " << it->first << ".\n";
-    }
-  }
-
-  const std::string& errors_str = errors.GetString();
-  if (errors_str != "") {
-    fprintf(stderr, "%s %s", FormatFileLocation(file, line).c_str(),
-            errors_str.c_str());
-    fflush(stderr);
-    posix::Abort();
-  }
-
-  return registered_tests;
-}
-
-}  // namespace internal
-}  // namespace testing
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Google C++ Mocking Framework (Google Mock)
-//
-// This file #includes all Google Mock implementation .cc files.  The
-// purpose is to allow a user to build Google Mock by compiling this
-// file alone.
-
-// This line ensures that gmock.h can be compiled on its own, even
-// when it's fused.
-#include "gmock/gmock.h"
-
-// The following lines pull in the real gmock *.cc files.
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements cardinalities.
-
-
-#include <limits.h>
-#include <ostream>  // NOLINT
-#include <sstream>
-#include <string>
-
-namespace testing {
-
-namespace {
-
-// Implements the Between(m, n) cardinality.
-class BetweenCardinalityImpl : public CardinalityInterface {
- public:
-  BetweenCardinalityImpl(int min, int max)
-      : min_(min >= 0 ? min : 0),
-        max_(max >= min_ ? max : min_) {
-    std::stringstream ss;
-    if (min < 0) {
-      ss << "The invocation lower bound must be >= 0, "
-         << "but is actually " << min << ".";
-      internal::Expect(false, __FILE__, __LINE__, ss.str());
-    } else if (max < 0) {
-      ss << "The invocation upper bound must be >= 0, "
-         << "but is actually " << max << ".";
-      internal::Expect(false, __FILE__, __LINE__, ss.str());
-    } else if (min > max) {
-      ss << "The invocation upper bound (" << max
-         << ") must be >= the invocation lower bound (" << min
-         << ").";
-      internal::Expect(false, __FILE__, __LINE__, ss.str());
-    }
-  }
-
-  // Conservative estimate on the lower/upper bound of the number of
-  // calls allowed.
-  int ConservativeLowerBound() const override { return min_; }
-  int ConservativeUpperBound() const override { return max_; }
-
-  bool IsSatisfiedByCallCount(int call_count) const override {
-    return min_ <= call_count && call_count <= max_;
-  }
-
-  bool IsSaturatedByCallCount(int call_count) const override {
-    return call_count >= max_;
-  }
-
-  void DescribeTo(::std::ostream* os) const override;
-
- private:
-  const int min_;
-  const int max_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(BetweenCardinalityImpl);
-};
-
-// Formats "n times" in a human-friendly way.
-inline std::string FormatTimes(int n) {
-  if (n == 1) {
-    return "once";
-  } else if (n == 2) {
-    return "twice";
-  } else {
-    std::stringstream ss;
-    ss << n << " times";
-    return ss.str();
-  }
-}
-
-// Describes the Between(m, n) cardinality in human-friendly text.
-void BetweenCardinalityImpl::DescribeTo(::std::ostream* os) const {
-  if (min_ == 0) {
-    if (max_ == 0) {
-      *os << "never called";
-    } else if (max_ == INT_MAX) {
-      *os << "called any number of times";
-    } else {
-      *os << "called at most " << FormatTimes(max_);
-    }
-  } else if (min_ == max_) {
-    *os << "called " << FormatTimes(min_);
-  } else if (max_ == INT_MAX) {
-    *os << "called at least " << FormatTimes(min_);
-  } else {
-    // 0 < min_ < max_ < INT_MAX
-    *os << "called between " << min_ << " and " << max_ << " times";
-  }
-}
-
-}  // Unnamed namespace
-
-// Describes the given call count to an ostream.
-void Cardinality::DescribeActualCallCountTo(int actual_call_count,
-                                            ::std::ostream* os) {
-  if (actual_call_count > 0) {
-    *os << "called " << FormatTimes(actual_call_count);
-  } else {
-    *os << "never called";
-  }
-}
-
-// Creates a cardinality that allows at least n calls.
-GTEST_API_ Cardinality AtLeast(int n) { return Between(n, INT_MAX); }
-
-// Creates a cardinality that allows at most n calls.
-GTEST_API_ Cardinality AtMost(int n) { return Between(0, n); }
-
-// Creates a cardinality that allows any number of calls.
-GTEST_API_ Cardinality AnyNumber() { return AtLeast(0); }
-
-// Creates a cardinality that allows between min and max calls.
-GTEST_API_ Cardinality Between(int min, int max) {
-  return Cardinality(new BetweenCardinalityImpl(min, max));
-}
-
-// Creates a cardinality that allows exactly n calls.
-GTEST_API_ Cardinality Exactly(int n) { return Between(n, n); }
-
-}  // namespace testing
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file defines some utilities useful for implementing Google
-// Mock.  They are subject to change without notice, so please DO NOT
-// USE THEM IN USER CODE.
-
-
-#include <ctype.h>
-#include <ostream>  // NOLINT
-#include <string>
-
-namespace testing {
-namespace internal {
-
-// Joins a vector of strings as if they are fields of a tuple; returns
-// the joined string.
-GTEST_API_ std::string JoinAsTuple(const Strings& fields) {
-  switch (fields.size()) {
-    case 0:
-      return "";
-    case 1:
-      return fields[0];
-    default:
-      std::string result = "(" + fields[0];
-      for (size_t i = 1; i < fields.size(); i++) {
-        result += ", ";
-        result += fields[i];
-      }
-      result += ")";
-      return result;
-  }
-}
-
-// Converts an identifier name to a space-separated list of lower-case
-// words.  Each maximum substring of the form [A-Za-z][a-z]*|\d+ is
-// treated as one word.  For example, both "FooBar123" and
-// "foo_bar_123" are converted to "foo bar 123".
-GTEST_API_ std::string ConvertIdentifierNameToWords(const char* id_name) {
-  std::string result;
-  char prev_char = '\0';
-  for (const char* p = id_name; *p != '\0'; prev_char = *(p++)) {
-    // We don't care about the current locale as the input is
-    // guaranteed to be a valid C++ identifier name.
-    const bool starts_new_word = IsUpper(*p) ||
-        (!IsAlpha(prev_char) && IsLower(*p)) ||
-        (!IsDigit(prev_char) && IsDigit(*p));
-
-    if (IsAlNum(*p)) {
-      if (starts_new_word && result != "")
-        result += ' ';
-      result += ToLower(*p);
-    }
-  }
-  return result;
-}
-
-// This class reports Google Mock failures as Google Test failures.  A
-// user can define another class in a similar fashion if they intend to
-// use Google Mock with a testing framework other than Google Test.
-class GoogleTestFailureReporter : public FailureReporterInterface {
- public:
-  void ReportFailure(FailureType type, const char* file, int line,
-                     const std::string& message) override {
-    AssertHelper(type == kFatal ?
-                 TestPartResult::kFatalFailure :
-                 TestPartResult::kNonFatalFailure,
-                 file,
-                 line,
-                 message.c_str()) = Message();
-    if (type == kFatal) {
-      posix::Abort();
-    }
-  }
-};
-
-// Returns the global failure reporter.  Will create a
-// GoogleTestFailureReporter and return it the first time called.
-GTEST_API_ FailureReporterInterface* GetFailureReporter() {
-  // Points to the global failure reporter used by Google Mock.  gcc
-  // guarantees that the following use of failure_reporter is
-  // thread-safe.  We may need to add additional synchronization to
-  // protect failure_reporter if we port Google Mock to other
-  // compilers.
-  static FailureReporterInterface* const failure_reporter =
-      new GoogleTestFailureReporter();
-  return failure_reporter;
-}
-
-// Protects global resources (stdout in particular) used by Log().
-static GTEST_DEFINE_STATIC_MUTEX_(g_log_mutex);
-
-// Returns true if and only if a log with the given severity is visible
-// according to the --gmock_verbose flag.
-GTEST_API_ bool LogIsVisible(LogSeverity severity) {
-  if (GMOCK_FLAG(verbose) == kInfoVerbosity) {
-    // Always show the log if --gmock_verbose=info.
-    return true;
-  } else if (GMOCK_FLAG(verbose) == kErrorVerbosity) {
-    // Always hide it if --gmock_verbose=error.
-    return false;
-  } else {
-    // If --gmock_verbose is neither "info" nor "error", we treat it
-    // as "warning" (its default value).
-    return severity == kWarning;
-  }
-}
-
-// Prints the given message to stdout if and only if 'severity' >= the level
-// specified by the --gmock_verbose flag.  If stack_frames_to_skip >=
-// 0, also prints the stack trace excluding the top
-// stack_frames_to_skip frames.  In opt mode, any positive
-// stack_frames_to_skip is treated as 0, since we don't know which
-// function calls will be inlined by the compiler and need to be
-// conservative.
-GTEST_API_ void Log(LogSeverity severity, const std::string& message,
-                    int stack_frames_to_skip) {
-  if (!LogIsVisible(severity))
-    return;
-
-  // Ensures that logs from different threads don't interleave.
-  MutexLock l(&g_log_mutex);
-
-  if (severity == kWarning) {
-    // Prints a GMOCK WARNING marker to make the warnings easily searchable.
-    std::cout << "\nGMOCK WARNING:";
-  }
-  // Pre-pends a new-line to message if it doesn't start with one.
-  if (message.empty() || message[0] != '\n') {
-    std::cout << "\n";
-  }
-  std::cout << message;
-  if (stack_frames_to_skip >= 0) {
-#ifdef NDEBUG
-    // In opt mode, we have to be conservative and skip no stack frame.
-    const int actual_to_skip = 0;
-#else
-    // In dbg mode, we can do what the caller tell us to do (plus one
-    // for skipping this function's stack frame).
-    const int actual_to_skip = stack_frames_to_skip + 1;
-#endif  // NDEBUG
-
-    // Appends a new-line to message if it doesn't end with one.
-    if (!message.empty() && *message.rbegin() != '\n') {
-      std::cout << "\n";
-    }
-    std::cout << "Stack trace:\n"
-         << ::testing::internal::GetCurrentOsStackTraceExceptTop(
-             ::testing::UnitTest::GetInstance(), actual_to_skip);
-  }
-  std::cout << ::std::flush;
-}
-
-GTEST_API_ WithoutMatchers GetWithoutMatchers() { return WithoutMatchers(); }
-
-GTEST_API_ void IllegalDoDefault(const char* file, int line) {
-  internal::Assert(
-      false, file, line,
-      "You are using DoDefault() inside a composite action like "
-      "DoAll() or WithArgs().  This is not supported for technical "
-      "reasons.  Please instead spell out the default action, or "
-      "assign the default action to an Action variable and use "
-      "the variable in various places.");
-}
-
-}  // namespace internal
-}  // namespace testing
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements Matcher<const string&>, Matcher<string>, and
-// utilities for defining matchers.
-
-
-#include <string.h>
-#include <iostream>
-#include <sstream>
-#include <string>
-
-namespace testing {
-namespace internal {
-
-// Returns the description for a matcher defined using the MATCHER*()
-// macro where the user-supplied description string is "", if
-// 'negation' is false; otherwise returns the description of the
-// negation of the matcher.  'param_values' contains a list of strings
-// that are the print-out of the matcher's parameters.
-GTEST_API_ std::string FormatMatcherDescription(bool negation,
-                                                const char* matcher_name,
-                                                const Strings& param_values) {
-  std::string result = ConvertIdentifierNameToWords(matcher_name);
-  if (param_values.size() >= 1) result += " " + JoinAsTuple(param_values);
-  return negation ? "not (" + result + ")" : result;
-}
-
-// FindMaxBipartiteMatching and its helper class.
-//
-// Uses the well-known Ford-Fulkerson max flow method to find a maximum
-// bipartite matching. Flow is considered to be from left to right.
-// There is an implicit source node that is connected to all of the left
-// nodes, and an implicit sink node that is connected to all of the
-// right nodes. All edges have unit capacity.
-//
-// Neither the flow graph nor the residual flow graph are represented
-// explicitly. Instead, they are implied by the information in 'graph' and
-// a vector<int> called 'left_' whose elements are initialized to the
-// value kUnused. This represents the initial state of the algorithm,
-// where the flow graph is empty, and the residual flow graph has the
-// following edges:
-//   - An edge from source to each left_ node
-//   - An edge from each right_ node to sink
-//   - An edge from each left_ node to each right_ node, if the
-//     corresponding edge exists in 'graph'.
-//
-// When the TryAugment() method adds a flow, it sets left_[l] = r for some
-// nodes l and r. This induces the following changes:
-//   - The edges (source, l), (l, r), and (r, sink) are added to the
-//     flow graph.
-//   - The same three edges are removed from the residual flow graph.
-//   - The reverse edges (l, source), (r, l), and (sink, r) are added
-//     to the residual flow graph, which is a directional graph
-//     representing unused flow capacity.
-//
-// When the method augments a flow (moving left_[l] from some r1 to some
-// other r2), this can be thought of as "undoing" the above steps with
-// respect to r1 and "redoing" them with respect to r2.
-//
-// It bears repeating that the flow graph and residual flow graph are
-// never represented explicitly, but can be derived by looking at the
-// information in 'graph' and in left_.
-//
-// As an optimization, there is a second vector<int> called right_ which
-// does not provide any new information. Instead, it enables more
-// efficient queries about edges entering or leaving the right-side nodes
-// of the flow or residual flow graphs. The following invariants are
-// maintained:
-//
-// left[l] == kUnused or right[left[l]] == l
-// right[r] == kUnused or left[right[r]] == r
-//
-// . [ source ]                                        .
-// .   |||                                             .
-// .   |||                                             .
-// .   ||\--> left[0]=1  ---\    right[0]=-1 ----\     .
-// .   ||                   |                    |     .
-// .   |\---> left[1]=-1    \--> right[1]=0  ---\|     .
-// .   |                                        ||     .
-// .   \----> left[2]=2  ------> right[2]=2  --\||     .
-// .                                           |||     .
-// .         elements           matchers       vvv     .
-// .                                         [ sink ]  .
-//
-// See Also:
-//   [1] Cormen, et al (2001). "Section 26.2: The Ford-Fulkerson method".
-//       "Introduction to Algorithms (Second ed.)", pp. 651-664.
-//   [2] "Ford-Fulkerson algorithm", Wikipedia,
-//       'http://en.wikipedia.org/wiki/Ford%E2%80%93Fulkerson_algorithm'
-class MaxBipartiteMatchState {
- public:
-  explicit MaxBipartiteMatchState(const MatchMatrix& graph)
-      : graph_(&graph),
-        left_(graph_->LhsSize(), kUnused),
-        right_(graph_->RhsSize(), kUnused) {}
-
-  // Returns the edges of a maximal match, each in the form {left, right}.
-  ElementMatcherPairs Compute() {
-    // 'seen' is used for path finding { 0: unseen, 1: seen }.
-    ::std::vector<char> seen;
-    // Searches the residual flow graph for a path from each left node to
-    // the sink in the residual flow graph, and if one is found, add flow
-    // to the graph. It's okay to search through the left nodes once. The
-    // edge from the implicit source node to each previously-visited left
-    // node will have flow if that left node has any path to the sink
-    // whatsoever. Subsequent augmentations can only add flow to the
-    // network, and cannot take away that previous flow unit from the source.
-    // Since the source-to-left edge can only carry one flow unit (or,
-    // each element can be matched to only one matcher), there is no need
-    // to visit the left nodes more than once looking for augmented paths.
-    // The flow is known to be possible or impossible by looking at the
-    // node once.
-    for (size_t ilhs = 0; ilhs < graph_->LhsSize(); ++ilhs) {
-      // Reset the path-marking vector and try to find a path from
-      // source to sink starting at the left_[ilhs] node.
-      GTEST_CHECK_(left_[ilhs] == kUnused)
-          << "ilhs: " << ilhs << ", left_[ilhs]: " << left_[ilhs];
-      // 'seen' initialized to 'graph_->RhsSize()' copies of 0.
-      seen.assign(graph_->RhsSize(), 0);
-      TryAugment(ilhs, &seen);
-    }
-    ElementMatcherPairs result;
-    for (size_t ilhs = 0; ilhs < left_.size(); ++ilhs) {
-      size_t irhs = left_[ilhs];
-      if (irhs == kUnused) continue;
-      result.push_back(ElementMatcherPair(ilhs, irhs));
-    }
-    return result;
-  }
-
- private:
-  static const size_t kUnused = static_cast<size_t>(-1);
-
-  // Perform a depth-first search from left node ilhs to the sink.  If a
-  // path is found, flow is added to the network by linking the left and
-  // right vector elements corresponding each segment of the path.
-  // Returns true if a path to sink was found, which means that a unit of
-  // flow was added to the network. The 'seen' vector elements correspond
-  // to right nodes and are marked to eliminate cycles from the search.
-  //
-  // Left nodes will only be explored at most once because they
-  // are accessible from at most one right node in the residual flow
-  // graph.
-  //
-  // Note that left_[ilhs] is the only element of left_ that TryAugment will
-  // potentially transition from kUnused to another value. Any other
-  // left_ element holding kUnused before TryAugment will be holding it
-  // when TryAugment returns.
-  //
-  bool TryAugment(size_t ilhs, ::std::vector<char>* seen) {
-    for (size_t irhs = 0; irhs < graph_->RhsSize(); ++irhs) {
-      if ((*seen)[irhs]) continue;
-      if (!graph_->HasEdge(ilhs, irhs)) continue;
-      // There's an available edge from ilhs to irhs.
-      (*seen)[irhs] = 1;
-      // Next a search is performed to determine whether
-      // this edge is a dead end or leads to the sink.
-      //
-      // right_[irhs] == kUnused means that there is residual flow from
-      // right node irhs to the sink, so we can use that to finish this
-      // flow path and return success.
-      //
-      // Otherwise there is residual flow to some ilhs. We push flow
-      // along that path and call ourselves recursively to see if this
-      // ultimately leads to sink.
-      if (right_[irhs] == kUnused || TryAugment(right_[irhs], seen)) {
-        // Add flow from left_[ilhs] to right_[irhs].
-        left_[ilhs] = irhs;
-        right_[irhs] = ilhs;
-        return true;
-      }
-    }
-    return false;
-  }
-
-  const MatchMatrix* graph_;  // not owned
-  // Each element of the left_ vector represents a left hand side node
-  // (i.e. an element) and each element of right_ is a right hand side
-  // node (i.e. a matcher). The values in the left_ vector indicate
-  // outflow from that node to a node on the right_ side. The values
-  // in the right_ indicate inflow, and specify which left_ node is
-  // feeding that right_ node, if any. For example, left_[3] == 1 means
-  // there's a flow from element #3 to matcher #1. Such a flow would also
-  // be redundantly represented in the right_ vector as right_[1] == 3.
-  // Elements of left_ and right_ are either kUnused or mutually
-  // referent. Mutually referent means that left_[right_[i]] = i and
-  // right_[left_[i]] = i.
-  ::std::vector<size_t> left_;
-  ::std::vector<size_t> right_;
-};
-
-const size_t MaxBipartiteMatchState::kUnused;
-
-GTEST_API_ ElementMatcherPairs FindMaxBipartiteMatching(const MatchMatrix& g) {
-  return MaxBipartiteMatchState(g).Compute();
-}
-
-static void LogElementMatcherPairVec(const ElementMatcherPairs& pairs,
-                                     ::std::ostream* stream) {
-  typedef ElementMatcherPairs::const_iterator Iter;
-  ::std::ostream& os = *stream;
-  os << "{";
-  const char* sep = "";
-  for (Iter it = pairs.begin(); it != pairs.end(); ++it) {
-    os << sep << "\n  ("
-       << "element #" << it->first << ", "
-       << "matcher #" << it->second << ")";
-    sep = ",";
-  }
-  os << "\n}";
-}
-
-bool MatchMatrix::NextGraph() {
-  for (size_t ilhs = 0; ilhs < LhsSize(); ++ilhs) {
-    for (size_t irhs = 0; irhs < RhsSize(); ++irhs) {
-      char& b = matched_[SpaceIndex(ilhs, irhs)];
-      if (!b) {
-        b = 1;
-        return true;
-      }
-      b = 0;
-    }
-  }
-  return false;
-}
-
-void MatchMatrix::Randomize() {
-  for (size_t ilhs = 0; ilhs < LhsSize(); ++ilhs) {
-    for (size_t irhs = 0; irhs < RhsSize(); ++irhs) {
-      char& b = matched_[SpaceIndex(ilhs, irhs)];
-      b = static_cast<char>(rand() & 1);  // NOLINT
-    }
-  }
-}
-
-std::string MatchMatrix::DebugString() const {
-  ::std::stringstream ss;
-  const char* sep = "";
-  for (size_t i = 0; i < LhsSize(); ++i) {
-    ss << sep;
-    for (size_t j = 0; j < RhsSize(); ++j) {
-      ss << HasEdge(i, j);
-    }
-    sep = ";";
-  }
-  return ss.str();
-}
-
-void UnorderedElementsAreMatcherImplBase::DescribeToImpl(
-    ::std::ostream* os) const {
-  switch (match_flags()) {
-    case UnorderedMatcherRequire::ExactMatch:
-      if (matcher_describers_.empty()) {
-        *os << "is empty";
-        return;
-      }
-      if (matcher_describers_.size() == 1) {
-        *os << "has " << Elements(1) << " and that element ";
-        matcher_describers_[0]->DescribeTo(os);
-        return;
-      }
-      *os << "has " << Elements(matcher_describers_.size())
-          << " and there exists some permutation of elements such that:\n";
-      break;
-    case UnorderedMatcherRequire::Superset:
-      *os << "a surjection from elements to requirements exists such that:\n";
-      break;
-    case UnorderedMatcherRequire::Subset:
-      *os << "an injection from elements to requirements exists such that:\n";
-      break;
-  }
-
-  const char* sep = "";
-  for (size_t i = 0; i != matcher_describers_.size(); ++i) {
-    *os << sep;
-    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
-      *os << " - element #" << i << " ";
-    } else {
-      *os << " - an element ";
-    }
-    matcher_describers_[i]->DescribeTo(os);
-    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
-      sep = ", and\n";
-    } else {
-      sep = "\n";
-    }
-  }
-}
-
-void UnorderedElementsAreMatcherImplBase::DescribeNegationToImpl(
-    ::std::ostream* os) const {
-  switch (match_flags()) {
-    case UnorderedMatcherRequire::ExactMatch:
-      if (matcher_describers_.empty()) {
-        *os << "isn't empty";
-        return;
-      }
-      if (matcher_describers_.size() == 1) {
-        *os << "doesn't have " << Elements(1) << ", or has " << Elements(1)
-            << " that ";
-        matcher_describers_[0]->DescribeNegationTo(os);
-        return;
-      }
-      *os << "doesn't have " << Elements(matcher_describers_.size())
-          << ", or there exists no permutation of elements such that:\n";
-      break;
-    case UnorderedMatcherRequire::Superset:
-      *os << "no surjection from elements to requirements exists such that:\n";
-      break;
-    case UnorderedMatcherRequire::Subset:
-      *os << "no injection from elements to requirements exists such that:\n";
-      break;
-  }
-  const char* sep = "";
-  for (size_t i = 0; i != matcher_describers_.size(); ++i) {
-    *os << sep;
-    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
-      *os << " - element #" << i << " ";
-    } else {
-      *os << " - an element ";
-    }
-    matcher_describers_[i]->DescribeTo(os);
-    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
-      sep = ", and\n";
-    } else {
-      sep = "\n";
-    }
-  }
-}
-
-// Checks that all matchers match at least one element, and that all
-// elements match at least one matcher. This enables faster matching
-// and better error reporting.
-// Returns false, writing an explanation to 'listener', if and only
-// if the success criteria are not met.
-bool UnorderedElementsAreMatcherImplBase::VerifyMatchMatrix(
-    const ::std::vector<std::string>& element_printouts,
-    const MatchMatrix& matrix, MatchResultListener* listener) const {
-  bool result = true;
-  ::std::vector<char> element_matched(matrix.LhsSize(), 0);
-  ::std::vector<char> matcher_matched(matrix.RhsSize(), 0);
-
-  for (size_t ilhs = 0; ilhs < matrix.LhsSize(); ilhs++) {
-    for (size_t irhs = 0; irhs < matrix.RhsSize(); irhs++) {
-      char matched = matrix.HasEdge(ilhs, irhs);
-      element_matched[ilhs] |= matched;
-      matcher_matched[irhs] |= matched;
-    }
-  }
-
-  if (match_flags() & UnorderedMatcherRequire::Superset) {
-    const char* sep =
-        "where the following matchers don't match any elements:\n";
-    for (size_t mi = 0; mi < matcher_matched.size(); ++mi) {
-      if (matcher_matched[mi]) continue;
-      result = false;
-      if (listener->IsInterested()) {
-        *listener << sep << "matcher #" << mi << ": ";
-        matcher_describers_[mi]->DescribeTo(listener->stream());
-        sep = ",\n";
-      }
-    }
-  }
-
-  if (match_flags() & UnorderedMatcherRequire::Subset) {
-    const char* sep =
-        "where the following elements don't match any matchers:\n";
-    const char* outer_sep = "";
-    if (!result) {
-      outer_sep = "\nand ";
-    }
-    for (size_t ei = 0; ei < element_matched.size(); ++ei) {
-      if (element_matched[ei]) continue;
-      result = false;
-      if (listener->IsInterested()) {
-        *listener << outer_sep << sep << "element #" << ei << ": "
-                  << element_printouts[ei];
-        sep = ",\n";
-        outer_sep = "";
-      }
-    }
-  }
-  return result;
-}
-
-bool UnorderedElementsAreMatcherImplBase::FindPairing(
-    const MatchMatrix& matrix, MatchResultListener* listener) const {
-  ElementMatcherPairs matches = FindMaxBipartiteMatching(matrix);
-
-  size_t max_flow = matches.size();
-  if ((match_flags() & UnorderedMatcherRequire::Superset) &&
-      max_flow < matrix.RhsSize()) {
-    if (listener->IsInterested()) {
-      *listener << "where no permutation of the elements can satisfy all "
-                   "matchers, and the closest match is "
-                << max_flow << " of " << matrix.RhsSize()
-                << " matchers with the pairings:\n";
-      LogElementMatcherPairVec(matches, listener->stream());
-    }
-    return false;
-  }
-  if ((match_flags() & UnorderedMatcherRequire::Subset) &&
-      max_flow < matrix.LhsSize()) {
-    if (listener->IsInterested()) {
-      *listener
-          << "where not all elements can be matched, and the closest match is "
-          << max_flow << " of " << matrix.RhsSize()
-          << " matchers with the pairings:\n";
-      LogElementMatcherPairVec(matches, listener->stream());
-    }
-    return false;
-  }
-
-  if (matches.size() > 1) {
-    if (listener->IsInterested()) {
-      const char* sep = "where:\n";
-      for (size_t mi = 0; mi < matches.size(); ++mi) {
-        *listener << sep << " - element #" << matches[mi].first
-                  << " is matched by matcher #" << matches[mi].second;
-        sep = ",\n";
-      }
-    }
-  }
-  return true;
-}
-
-}  // namespace internal
-}  // namespace testing
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements the spec builder syntax (ON_CALL and
-// EXPECT_CALL).
-
-
-#include <stdlib.h>
-
-#include <iostream>  // NOLINT
-#include <map>
-#include <memory>
-#include <set>
-#include <string>
-#include <vector>
-
-
-#if GTEST_OS_CYGWIN || GTEST_OS_LINUX || GTEST_OS_MAC
-# include <unistd.h>  // NOLINT
-#endif
-
-// Silence C4800 (C4800: 'int *const ': forcing value
-// to bool 'true' or 'false') for MSVC 15
-#ifdef _MSC_VER
-#if _MSC_VER == 1900
-#  pragma warning(push)
-#  pragma warning(disable:4800)
-#endif
-#endif
-
-namespace testing {
-namespace internal {
-
-// Protects the mock object registry (in class Mock), all function
-// mockers, and all expectations.
-GTEST_API_ GTEST_DEFINE_STATIC_MUTEX_(g_gmock_mutex);
-
-// Logs a message including file and line number information.
-GTEST_API_ void LogWithLocation(testing::internal::LogSeverity severity,
-                                const char* file, int line,
-                                const std::string& message) {
-  ::std::ostringstream s;
-  s << internal::FormatFileLocation(file, line) << " " << message
-    << ::std::endl;
-  Log(severity, s.str(), 0);
-}
-
-// Constructs an ExpectationBase object.
-ExpectationBase::ExpectationBase(const char* a_file, int a_line,
-                                 const std::string& a_source_text)
-    : file_(a_file),
-      line_(a_line),
-      source_text_(a_source_text),
-      cardinality_specified_(false),
-      cardinality_(Exactly(1)),
-      call_count_(0),
-      retired_(false),
-      extra_matcher_specified_(false),
-      repeated_action_specified_(false),
-      retires_on_saturation_(false),
-      last_clause_(kNone),
-      action_count_checked_(false) {}
-
-// Destructs an ExpectationBase object.
-ExpectationBase::~ExpectationBase() {}
-
-// Explicitly specifies the cardinality of this expectation.  Used by
-// the subclasses to implement the .Times() clause.
-void ExpectationBase::SpecifyCardinality(const Cardinality& a_cardinality) {
-  cardinality_specified_ = true;
-  cardinality_ = a_cardinality;
-}
-
-// Retires all pre-requisites of this expectation.
-void ExpectationBase::RetireAllPreRequisites()
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-  if (is_retired()) {
-    // We can take this short-cut as we never retire an expectation
-    // until we have retired all its pre-requisites.
-    return;
-  }
-
-  ::std::vector<ExpectationBase*> expectations(1, this);
-  while (!expectations.empty()) {
-    ExpectationBase* exp = expectations.back();
-    expectations.pop_back();
-
-    for (ExpectationSet::const_iterator it =
-             exp->immediate_prerequisites_.begin();
-         it != exp->immediate_prerequisites_.end(); ++it) {
-      ExpectationBase* next = it->expectation_base().get();
-      if (!next->is_retired()) {
-        next->Retire();
-        expectations.push_back(next);
-      }
-    }
-  }
-}
-
-// Returns true if and only if all pre-requisites of this expectation
-// have been satisfied.
-bool ExpectationBase::AllPrerequisitesAreSatisfied() const
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-  g_gmock_mutex.AssertHeld();
-  ::std::vector<const ExpectationBase*> expectations(1, this);
-  while (!expectations.empty()) {
-    const ExpectationBase* exp = expectations.back();
-    expectations.pop_back();
-
-    for (ExpectationSet::const_iterator it =
-             exp->immediate_prerequisites_.begin();
-         it != exp->immediate_prerequisites_.end(); ++it) {
-      const ExpectationBase* next = it->expectation_base().get();
-      if (!next->IsSatisfied()) return false;
-      expectations.push_back(next);
-    }
-  }
-  return true;
-}
-
-// Adds unsatisfied pre-requisites of this expectation to 'result'.
-void ExpectationBase::FindUnsatisfiedPrerequisites(ExpectationSet* result) const
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-  g_gmock_mutex.AssertHeld();
-  ::std::vector<const ExpectationBase*> expectations(1, this);
-  while (!expectations.empty()) {
-    const ExpectationBase* exp = expectations.back();
-    expectations.pop_back();
-
-    for (ExpectationSet::const_iterator it =
-             exp->immediate_prerequisites_.begin();
-         it != exp->immediate_prerequisites_.end(); ++it) {
-      const ExpectationBase* next = it->expectation_base().get();
-
-      if (next->IsSatisfied()) {
-        // If *it is satisfied and has a call count of 0, some of its
-        // pre-requisites may not be satisfied yet.
-        if (next->call_count_ == 0) {
-          expectations.push_back(next);
-        }
-      } else {
-        // Now that we know next is unsatisfied, we are not so interested
-        // in whether its pre-requisites are satisfied.  Therefore we
-        // don't iterate into it here.
-        *result += *it;
-      }
-    }
-  }
-}
-
-// Describes how many times a function call matching this
-// expectation has occurred.
-void ExpectationBase::DescribeCallCountTo(::std::ostream* os) const
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-  g_gmock_mutex.AssertHeld();
-
-  // Describes how many times the function is expected to be called.
-  *os << "         Expected: to be ";
-  cardinality().DescribeTo(os);
-  *os << "\n           Actual: ";
-  Cardinality::DescribeActualCallCountTo(call_count(), os);
-
-  // Describes the state of the expectation (e.g. is it satisfied?
-  // is it active?).
-  *os << " - " << (IsOverSaturated() ? "over-saturated" :
-                   IsSaturated() ? "saturated" :
-                   IsSatisfied() ? "satisfied" : "unsatisfied")
-      << " and "
-      << (is_retired() ? "retired" : "active");
-}
-
-// Checks the action count (i.e. the number of WillOnce() and
-// WillRepeatedly() clauses) against the cardinality if this hasn't
-// been done before.  Prints a warning if there are too many or too
-// few actions.
-void ExpectationBase::CheckActionCountIfNotDone() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  bool should_check = false;
-  {
-    MutexLock l(&mutex_);
-    if (!action_count_checked_) {
-      action_count_checked_ = true;
-      should_check = true;
-    }
-  }
-
-  if (should_check) {
-    if (!cardinality_specified_) {
-      // The cardinality was inferred - no need to check the action
-      // count against it.
-      return;
-    }
-
-    // The cardinality was explicitly specified.
-    const int action_count = static_cast<int>(untyped_actions_.size());
-    const int upper_bound = cardinality().ConservativeUpperBound();
-    const int lower_bound = cardinality().ConservativeLowerBound();
-    bool too_many;  // True if there are too many actions, or false
-    // if there are too few.
-    if (action_count > upper_bound ||
-        (action_count == upper_bound && repeated_action_specified_)) {
-      too_many = true;
-    } else if (0 < action_count && action_count < lower_bound &&
-               !repeated_action_specified_) {
-      too_many = false;
-    } else {
-      return;
-    }
-
-    ::std::stringstream ss;
-    DescribeLocationTo(&ss);
-    ss << "Too " << (too_many ? "many" : "few")
-       << " actions specified in " << source_text() << "...\n"
-       << "Expected to be ";
-    cardinality().DescribeTo(&ss);
-    ss << ", but has " << (too_many ? "" : "only ")
-       << action_count << " WillOnce()"
-       << (action_count == 1 ? "" : "s");
-    if (repeated_action_specified_) {
-      ss << " and a WillRepeatedly()";
-    }
-    ss << ".";
-    Log(kWarning, ss.str(), -1);  // -1 means "don't print stack trace".
-  }
-}
-
-// Implements the .Times() clause.
-void ExpectationBase::UntypedTimes(const Cardinality& a_cardinality) {
-  if (last_clause_ == kTimes) {
-    ExpectSpecProperty(false,
-                       ".Times() cannot appear "
-                       "more than once in an EXPECT_CALL().");
-  } else {
-    ExpectSpecProperty(last_clause_ < kTimes,
-                       ".Times() cannot appear after "
-                       ".InSequence(), .WillOnce(), .WillRepeatedly(), "
-                       "or .RetiresOnSaturation().");
-  }
-  last_clause_ = kTimes;
-
-  SpecifyCardinality(a_cardinality);
-}
-
-// Points to the implicit sequence introduced by a living InSequence
-// object (if any) in the current thread or NULL.
-GTEST_API_ ThreadLocal<Sequence*> g_gmock_implicit_sequence;
-
-// Reports an uninteresting call (whose description is in msg) in the
-// manner specified by 'reaction'.
-void ReportUninterestingCall(CallReaction reaction, const std::string& msg) {
-  // Include a stack trace only if --gmock_verbose=info is specified.
-  const int stack_frames_to_skip =
-      GMOCK_FLAG(verbose) == kInfoVerbosity ? 3 : -1;
-  switch (reaction) {
-    case kAllow:
-      Log(kInfo, msg, stack_frames_to_skip);
-      break;
-    case kWarn:
-      Log(kWarning,
-          msg +
-              "\nNOTE: You can safely ignore the above warning unless this "
-              "call should not happen.  Do not suppress it by blindly adding "
-              "an EXPECT_CALL() if you don't mean to enforce the call.  "
-              "See "
-              "https://github.com/google/googletest/blob/master/docs/"
-              "gmock_cook_book.md#"
-              "knowing-when-to-expect for details.\n",
-          stack_frames_to_skip);
-      break;
-    default:  // FAIL
-      Expect(false, nullptr, -1, msg);
-  }
-}
-
-UntypedFunctionMockerBase::UntypedFunctionMockerBase()
-    : mock_obj_(nullptr), name_("") {}
-
-UntypedFunctionMockerBase::~UntypedFunctionMockerBase() {}
-
-// Sets the mock object this mock method belongs to, and registers
-// this information in the global mock registry.  Will be called
-// whenever an EXPECT_CALL() or ON_CALL() is executed on this mock
-// method.
-void UntypedFunctionMockerBase::RegisterOwner(const void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-  {
-    MutexLock l(&g_gmock_mutex);
-    mock_obj_ = mock_obj;
-  }
-  Mock::Register(mock_obj, this);
-}
-
-// Sets the mock object this mock method belongs to, and sets the name
-// of the mock function.  Will be called upon each invocation of this
-// mock function.
-void UntypedFunctionMockerBase::SetOwnerAndName(const void* mock_obj,
-                                                const char* name)
-    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-  // We protect name_ under g_gmock_mutex in case this mock function
-  // is called from two threads concurrently.
-  MutexLock l(&g_gmock_mutex);
-  mock_obj_ = mock_obj;
-  name_ = name;
-}
-
-// Returns the name of the function being mocked.  Must be called
-// after RegisterOwner() or SetOwnerAndName() has been called.
-const void* UntypedFunctionMockerBase::MockObject() const
-    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-  const void* mock_obj;
-  {
-    // We protect mock_obj_ under g_gmock_mutex in case this mock
-    // function is called from two threads concurrently.
-    MutexLock l(&g_gmock_mutex);
-    Assert(mock_obj_ != nullptr, __FILE__, __LINE__,
-           "MockObject() must not be called before RegisterOwner() or "
-           "SetOwnerAndName() has been called.");
-    mock_obj = mock_obj_;
-  }
-  return mock_obj;
-}
-
-// Returns the name of this mock method.  Must be called after
-// SetOwnerAndName() has been called.
-const char* UntypedFunctionMockerBase::Name() const
-    GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-  const char* name;
-  {
-    // We protect name_ under g_gmock_mutex in case this mock
-    // function is called from two threads concurrently.
-    MutexLock l(&g_gmock_mutex);
-    Assert(name_ != nullptr, __FILE__, __LINE__,
-           "Name() must not be called before SetOwnerAndName() has "
-           "been called.");
-    name = name_;
-  }
-  return name;
-}
-
-// Calculates the result of invoking this mock function with the given
-// arguments, prints it, and returns it.  The caller is responsible
-// for deleting the result.
-UntypedActionResultHolderBase* UntypedFunctionMockerBase::UntypedInvokeWith(
-    void* const untyped_args) GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-  // See the definition of untyped_expectations_ for why access to it
-  // is unprotected here.
-  if (untyped_expectations_.size() == 0) {
-    // No expectation is set on this mock method - we have an
-    // uninteresting call.
-
-    // We must get Google Mock's reaction on uninteresting calls
-    // made on this mock object BEFORE performing the action,
-    // because the action may DELETE the mock object and make the
-    // following expression meaningless.
-    const CallReaction reaction =
-        Mock::GetReactionOnUninterestingCalls(MockObject());
-
-    // True if and only if we need to print this call's arguments and return
-    // value.  This definition must be kept in sync with
-    // the behavior of ReportUninterestingCall().
-    const bool need_to_report_uninteresting_call =
-        // If the user allows this uninteresting call, we print it
-        // only when they want informational messages.
-        reaction == kAllow ? LogIsVisible(kInfo) :
-                           // If the user wants this to be a warning, we print
-                           // it only when they want to see warnings.
-            reaction == kWarn
-                ? LogIsVisible(kWarning)
-                :
-                // Otherwise, the user wants this to be an error, and we
-                // should always print detailed information in the error.
-                true;
-
-    if (!need_to_report_uninteresting_call) {
-      // Perform the action without printing the call information.
-      return this->UntypedPerformDefaultAction(
-          untyped_args, "Function call: " + std::string(Name()));
-    }
-
-    // Warns about the uninteresting call.
-    ::std::stringstream ss;
-    this->UntypedDescribeUninterestingCall(untyped_args, &ss);
-
-    // Calculates the function result.
-    UntypedActionResultHolderBase* const result =
-        this->UntypedPerformDefaultAction(untyped_args, ss.str());
-
-    // Prints the function result.
-    if (result != nullptr) result->PrintAsActionResult(&ss);
-
-    ReportUninterestingCall(reaction, ss.str());
-    return result;
-  }
-
-  bool is_excessive = false;
-  ::std::stringstream ss;
-  ::std::stringstream why;
-  ::std::stringstream loc;
-  const void* untyped_action = nullptr;
-
-  // The UntypedFindMatchingExpectation() function acquires and
-  // releases g_gmock_mutex.
-
-  const ExpectationBase* const untyped_expectation =
-      this->UntypedFindMatchingExpectation(untyped_args, &untyped_action,
-                                           &is_excessive, &ss, &why);
-  const bool found = untyped_expectation != nullptr;
-
-  // True if and only if we need to print the call's arguments
-  // and return value.
-  // This definition must be kept in sync with the uses of Expect()
-  // and Log() in this function.
-  const bool need_to_report_call =
-      !found || is_excessive || LogIsVisible(kInfo);
-  if (!need_to_report_call) {
-    // Perform the action without printing the call information.
-    return untyped_action == nullptr
-               ? this->UntypedPerformDefaultAction(untyped_args, "")
-               : this->UntypedPerformAction(untyped_action, untyped_args);
-  }
-
-  ss << "    Function call: " << Name();
-  this->UntypedPrintArgs(untyped_args, &ss);
-
-  // In case the action deletes a piece of the expectation, we
-  // generate the message beforehand.
-  if (found && !is_excessive) {
-    untyped_expectation->DescribeLocationTo(&loc);
-  }
-
-  UntypedActionResultHolderBase* result = nullptr;
-
-  auto perform_action = [&] {
-    return untyped_action == nullptr
-               ? this->UntypedPerformDefaultAction(untyped_args, ss.str())
-               : this->UntypedPerformAction(untyped_action, untyped_args);
-  };
-  auto handle_failures = [&] {
-    ss << "\n" << why.str();
-
-    if (!found) {
-      // No expectation matches this call - reports a failure.
-      Expect(false, nullptr, -1, ss.str());
-    } else if (is_excessive) {
-      // We had an upper-bound violation and the failure message is in ss.
-      Expect(false, untyped_expectation->file(), untyped_expectation->line(),
-             ss.str());
-    } else {
-      // We had an expected call and the matching expectation is
-      // described in ss.
-      Log(kInfo, loc.str() + ss.str(), 2);
-    }
-  };
-#if GTEST_HAS_EXCEPTIONS
-  try {
-    result = perform_action();
-  } catch (...) {
-    handle_failures();
-    throw;
-  }
-#else
-  result = perform_action();
-#endif
-
-  if (result != nullptr) result->PrintAsActionResult(&ss);
-  handle_failures();
-  return result;
-}
-
-// Returns an Expectation object that references and co-owns exp,
-// which must be an expectation on this mock function.
-Expectation UntypedFunctionMockerBase::GetHandleOf(ExpectationBase* exp) {
-  // See the definition of untyped_expectations_ for why access to it
-  // is unprotected here.
-  for (UntypedExpectations::const_iterator it =
-           untyped_expectations_.begin();
-       it != untyped_expectations_.end(); ++it) {
-    if (it->get() == exp) {
-      return Expectation(*it);
-    }
-  }
-
-  Assert(false, __FILE__, __LINE__, "Cannot find expectation.");
-  return Expectation();
-  // The above statement is just to make the code compile, and will
-  // never be executed.
-}
-
-// Verifies that all expectations on this mock function have been
-// satisfied.  Reports one or more Google Test non-fatal failures
-// and returns false if not.
-bool UntypedFunctionMockerBase::VerifyAndClearExpectationsLocked()
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-  g_gmock_mutex.AssertHeld();
-  bool expectations_met = true;
-  for (UntypedExpectations::const_iterator it =
-           untyped_expectations_.begin();
-       it != untyped_expectations_.end(); ++it) {
-    ExpectationBase* const untyped_expectation = it->get();
-    if (untyped_expectation->IsOverSaturated()) {
-      // There was an upper-bound violation.  Since the error was
-      // already reported when it occurred, there is no need to do
-      // anything here.
-      expectations_met = false;
-    } else if (!untyped_expectation->IsSatisfied()) {
-      expectations_met = false;
-      ::std::stringstream ss;
-      ss  << "Actual function call count doesn't match "
-          << untyped_expectation->source_text() << "...\n";
-      // No need to show the source file location of the expectation
-      // in the description, as the Expect() call that follows already
-      // takes care of it.
-      untyped_expectation->MaybeDescribeExtraMatcherTo(&ss);
-      untyped_expectation->DescribeCallCountTo(&ss);
-      Expect(false, untyped_expectation->file(),
-             untyped_expectation->line(), ss.str());
-    }
-  }
-
-  // Deleting our expectations may trigger other mock objects to be deleted, for
-  // example if an action contains a reference counted smart pointer to that
-  // mock object, and that is the last reference. So if we delete our
-  // expectations within the context of the global mutex we may deadlock when
-  // this method is called again. Instead, make a copy of the set of
-  // expectations to delete, clear our set within the mutex, and then clear the
-  // copied set outside of it.
-  UntypedExpectations expectations_to_delete;
-  untyped_expectations_.swap(expectations_to_delete);
-
-  g_gmock_mutex.Unlock();
-  expectations_to_delete.clear();
-  g_gmock_mutex.Lock();
-
-  return expectations_met;
-}
-
-CallReaction intToCallReaction(int mock_behavior) {
-  if (mock_behavior >= kAllow && mock_behavior <= kFail) {
-    return static_cast<internal::CallReaction>(mock_behavior);
-  }
-  return kWarn;
-}
-
-}  // namespace internal
-
-// Class Mock.
-
-namespace {
-
-typedef std::set<internal::UntypedFunctionMockerBase*> FunctionMockers;
-
-// The current state of a mock object.  Such information is needed for
-// detecting leaked mock objects and explicitly verifying a mock's
-// expectations.
-struct MockObjectState {
-  MockObjectState()
-      : first_used_file(nullptr), first_used_line(-1), leakable(false) {}
-
-  // Where in the source file an ON_CALL or EXPECT_CALL is first
-  // invoked on this mock object.
-  const char* first_used_file;
-  int first_used_line;
-  ::std::string first_used_test_suite;
-  ::std::string first_used_test;
-  bool leakable;  // true if and only if it's OK to leak the object.
-  FunctionMockers function_mockers;  // All registered methods of the object.
-};
-
-// A global registry holding the state of all mock objects that are
-// alive.  A mock object is added to this registry the first time
-// Mock::AllowLeak(), ON_CALL(), or EXPECT_CALL() is called on it.  It
-// is removed from the registry in the mock object's destructor.
-class MockObjectRegistry {
- public:
-  // Maps a mock object (identified by its address) to its state.
-  typedef std::map<const void*, MockObjectState> StateMap;
-
-  // This destructor will be called when a program exits, after all
-  // tests in it have been run.  By then, there should be no mock
-  // object alive.  Therefore we report any living object as test
-  // failure, unless the user explicitly asked us to ignore it.
-  ~MockObjectRegistry() {
-    if (!GMOCK_FLAG(catch_leaked_mocks))
-      return;
-
-    int leaked_count = 0;
-    for (StateMap::const_iterator it = states_.begin(); it != states_.end();
-         ++it) {
-      if (it->second.leakable)  // The user said it's fine to leak this object.
-        continue;
-
-      // FIXME: Print the type of the leaked object.
-      // This can help the user identify the leaked object.
-      std::cout << "\n";
-      const MockObjectState& state = it->second;
-      std::cout << internal::FormatFileLocation(state.first_used_file,
-                                                state.first_used_line);
-      std::cout << " ERROR: this mock object";
-      if (state.first_used_test != "") {
-        std::cout << " (used in test " << state.first_used_test_suite << "."
-                  << state.first_used_test << ")";
-      }
-      std::cout << " should be deleted but never is. Its address is @"
-           << it->first << ".";
-      leaked_count++;
-    }
-    if (leaked_count > 0) {
-      std::cout << "\nERROR: " << leaked_count << " leaked mock "
-                << (leaked_count == 1 ? "object" : "objects")
-                << " found at program exit. Expectations on a mock object are "
-                   "verified when the object is destructed. Leaking a mock "
-                   "means that its expectations aren't verified, which is "
-                   "usually a test bug. If you really intend to leak a mock, "
-                   "you can suppress this error using "
-                   "testing::Mock::AllowLeak(mock_object), or you may use a "
-                   "fake or stub instead of a mock.\n";
-      std::cout.flush();
-      ::std::cerr.flush();
-      // RUN_ALL_TESTS() has already returned when this destructor is
-      // called.  Therefore we cannot use the normal Google Test
-      // failure reporting mechanism.
-      _exit(1);  // We cannot call exit() as it is not reentrant and
-                 // may already have been called.
-    }
-  }
-
-  StateMap& states() { return states_; }
-
- private:
-  StateMap states_;
-};
-
-// Protected by g_gmock_mutex.
-MockObjectRegistry g_mock_object_registry;
-
-// Maps a mock object to the reaction Google Mock should have when an
-// uninteresting method is called.  Protected by g_gmock_mutex.
-std::map<const void*, internal::CallReaction> g_uninteresting_call_reaction;
-
-// Sets the reaction Google Mock should have when an uninteresting
-// method of the given mock object is called.
-void SetReactionOnUninterestingCalls(const void* mock_obj,
-                                     internal::CallReaction reaction)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  g_uninteresting_call_reaction[mock_obj] = reaction;
-}
-
-}  // namespace
-
-// Tells Google Mock to allow uninteresting calls on the given mock
-// object.
-void Mock::AllowUninterestingCalls(const void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  SetReactionOnUninterestingCalls(mock_obj, internal::kAllow);
-}
-
-// Tells Google Mock to warn the user about uninteresting calls on the
-// given mock object.
-void Mock::WarnUninterestingCalls(const void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  SetReactionOnUninterestingCalls(mock_obj, internal::kWarn);
-}
-
-// Tells Google Mock to fail uninteresting calls on the given mock
-// object.
-void Mock::FailUninterestingCalls(const void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  SetReactionOnUninterestingCalls(mock_obj, internal::kFail);
-}
-
-// Tells Google Mock the given mock object is being destroyed and its
-// entry in the call-reaction table should be removed.
-void Mock::UnregisterCallReaction(const void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  g_uninteresting_call_reaction.erase(mock_obj);
-}
-
-// Returns the reaction Google Mock will have on uninteresting calls
-// made on the given mock object.
-internal::CallReaction Mock::GetReactionOnUninterestingCalls(
-    const void* mock_obj)
-        GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  return (g_uninteresting_call_reaction.count(mock_obj) == 0) ?
-      internal::intToCallReaction(GMOCK_FLAG(default_mock_behavior)) :
-      g_uninteresting_call_reaction[mock_obj];
-}
-
-// Tells Google Mock to ignore mock_obj when checking for leaked mock
-// objects.
-void Mock::AllowLeak(const void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  g_mock_object_registry.states()[mock_obj].leakable = true;
-}
-
-// Verifies and clears all expectations on the given mock object.  If
-// the expectations aren't satisfied, generates one or more Google
-// Test non-fatal failures and returns false.
-bool Mock::VerifyAndClearExpectations(void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  return VerifyAndClearExpectationsLocked(mock_obj);
-}
-
-// Verifies all expectations on the given mock object and clears its
-// default actions and expectations.  Returns true if and only if the
-// verification was successful.
-bool Mock::VerifyAndClear(void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  ClearDefaultActionsLocked(mock_obj);
-  return VerifyAndClearExpectationsLocked(mock_obj);
-}
-
-// Verifies and clears all expectations on the given mock object.  If
-// the expectations aren't satisfied, generates one or more Google
-// Test non-fatal failures and returns false.
-bool Mock::VerifyAndClearExpectationsLocked(void* mock_obj)
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
-  internal::g_gmock_mutex.AssertHeld();
-  if (g_mock_object_registry.states().count(mock_obj) == 0) {
-    // No EXPECT_CALL() was set on the given mock object.
-    return true;
-  }
-
-  // Verifies and clears the expectations on each mock method in the
-  // given mock object.
-  bool expectations_met = true;
-  FunctionMockers& mockers =
-      g_mock_object_registry.states()[mock_obj].function_mockers;
-  for (FunctionMockers::const_iterator it = mockers.begin();
-       it != mockers.end(); ++it) {
-    if (!(*it)->VerifyAndClearExpectationsLocked()) {
-      expectations_met = false;
-    }
-  }
-
-  // We don't clear the content of mockers, as they may still be
-  // needed by ClearDefaultActionsLocked().
-  return expectations_met;
-}
-
-bool Mock::IsNaggy(void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  return Mock::GetReactionOnUninterestingCalls(mock_obj) == internal::kWarn;
-}
-bool Mock::IsNice(void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  return Mock::GetReactionOnUninterestingCalls(mock_obj) == internal::kAllow;
-}
-bool Mock::IsStrict(void* mock_obj)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  return Mock::GetReactionOnUninterestingCalls(mock_obj) == internal::kFail;
-}
-
-// Registers a mock object and a mock method it owns.
-void Mock::Register(const void* mock_obj,
-                    internal::UntypedFunctionMockerBase* mocker)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  g_mock_object_registry.states()[mock_obj].function_mockers.insert(mocker);
-}
-
-// Tells Google Mock where in the source code mock_obj is used in an
-// ON_CALL or EXPECT_CALL.  In case mock_obj is leaked, this
-// information helps the user identify which object it is.
-void Mock::RegisterUseByOnCallOrExpectCall(const void* mock_obj,
-                                           const char* file, int line)
-    GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex) {
-  internal::MutexLock l(&internal::g_gmock_mutex);
-  MockObjectState& state = g_mock_object_registry.states()[mock_obj];
-  if (state.first_used_file == nullptr) {
-    state.first_used_file = file;
-    state.first_used_line = line;
-    const TestInfo* const test_info =
-        UnitTest::GetInstance()->current_test_info();
-    if (test_info != nullptr) {
-      state.first_used_test_suite = test_info->test_suite_name();
-      state.first_used_test = test_info->name();
-    }
-  }
-}
-
-// Unregisters a mock method; removes the owning mock object from the
-// registry when the last mock method associated with it has been
-// unregistered.  This is called only in the destructor of
-// FunctionMockerBase.
-void Mock::UnregisterLocked(internal::UntypedFunctionMockerBase* mocker)
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
-  internal::g_gmock_mutex.AssertHeld();
-  for (MockObjectRegistry::StateMap::iterator it =
-           g_mock_object_registry.states().begin();
-       it != g_mock_object_registry.states().end(); ++it) {
-    FunctionMockers& mockers = it->second.function_mockers;
-    if (mockers.erase(mocker) > 0) {
-      // mocker was in mockers and has been just removed.
-      if (mockers.empty()) {
-        g_mock_object_registry.states().erase(it);
-      }
-      return;
-    }
-  }
-}
-
-// Clears all ON_CALL()s set on the given mock object.
-void Mock::ClearDefaultActionsLocked(void* mock_obj)
-    GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex) {
-  internal::g_gmock_mutex.AssertHeld();
-
-  if (g_mock_object_registry.states().count(mock_obj) == 0) {
-    // No ON_CALL() was set on the given mock object.
-    return;
-  }
-
-  // Clears the default actions for each mock method in the given mock
-  // object.
-  FunctionMockers& mockers =
-      g_mock_object_registry.states()[mock_obj].function_mockers;
-  for (FunctionMockers::const_iterator it = mockers.begin();
-       it != mockers.end(); ++it) {
-    (*it)->ClearDefaultActionsLocked();
-  }
-
-  // We don't clear the content of mockers, as they may still be
-  // needed by VerifyAndClearExpectationsLocked().
-}
-
-Expectation::Expectation() {}
-
-Expectation::Expectation(
-    const std::shared_ptr<internal::ExpectationBase>& an_expectation_base)
-    : expectation_base_(an_expectation_base) {}
-
-Expectation::~Expectation() {}
-
-// Adds an expectation to a sequence.
-void Sequence::AddExpectation(const Expectation& expectation) const {
-  if (*last_expectation_ != expectation) {
-    if (last_expectation_->expectation_base() != nullptr) {
-      expectation.expectation_base()->immediate_prerequisites_
-          += *last_expectation_;
-    }
-    *last_expectation_ = expectation;
-  }
-}
-
-// Creates the implicit sequence if there isn't one.
-InSequence::InSequence() {
-  if (internal::g_gmock_implicit_sequence.get() == nullptr) {
-    internal::g_gmock_implicit_sequence.set(new Sequence);
-    sequence_created_ = true;
-  } else {
-    sequence_created_ = false;
-  }
-}
-
-// Deletes the implicit sequence if it was created by the constructor
-// of this object.
-InSequence::~InSequence() {
-  if (sequence_created_) {
-    delete internal::g_gmock_implicit_sequence.get();
-    internal::g_gmock_implicit_sequence.set(nullptr);
-  }
-}
-
-}  // namespace testing
-
-#ifdef _MSC_VER
-#if _MSC_VER == 1900
-#  pragma warning(pop)
-#endif
-#endif
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-
-namespace testing {
-
-GMOCK_DEFINE_bool_(catch_leaked_mocks, true,
-                   "true if and only if Google Mock should report leaked "
-                   "mock objects as failures.");
-
-GMOCK_DEFINE_string_(verbose, internal::kWarningVerbosity,
-                     "Controls how verbose Google Mock's output is."
-                     "  Valid values:\n"
-                     "  info    - prints all messages.\n"
-                     "  warning - prints warnings and errors.\n"
-                     "  error   - prints errors only.");
-
-GMOCK_DEFINE_int32_(default_mock_behavior, 1,
-                    "Controls the default behavior of mocks."
-                    "  Valid values:\n"
-                    "  0 - by default, mocks act as NiceMocks.\n"
-                    "  1 - by default, mocks act as NaggyMocks.\n"
-                    "  2 - by default, mocks act as StrictMocks.");
-
-namespace internal {
-
-// Parses a string as a command line flag.  The string should have the
-// format "--gmock_flag=value".  When def_optional is true, the
-// "=value" part can be omitted.
-//
-// Returns the value of the flag, or NULL if the parsing failed.
-static const char* ParseGoogleMockFlagValue(const char* str,
-                                            const char* flag,
-                                            bool def_optional) {
-  // str and flag must not be NULL.
-  if (str == nullptr || flag == nullptr) return nullptr;
-
-  // The flag must start with "--gmock_".
-  const std::string flag_str = std::string("--gmock_") + flag;
-  const size_t flag_len = flag_str.length();
-  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
-
-  // Skips the flag name.
-  const char* flag_end = str + flag_len;
-
-  // When def_optional is true, it's OK to not have a "=value" part.
-  if (def_optional && (flag_end[0] == '\0')) {
-    return flag_end;
-  }
-
-  // If def_optional is true and there are more characters after the
-  // flag name, or if def_optional is false, there must be a '=' after
-  // the flag name.
-  if (flag_end[0] != '=') return nullptr;
-
-  // Returns the string after "=".
-  return flag_end + 1;
-}
-
-// Parses a string for a Google Mock bool flag, in the form of
-// "--gmock_flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-static bool ParseGoogleMockBoolFlag(const char* str, const char* flag,
-                                    bool* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseGoogleMockFlagValue(str, flag, true);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Converts the string value to a bool.
-  *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');
-  return true;
-}
-
-// Parses a string for a Google Mock string flag, in the form of
-// "--gmock_flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-template <typename String>
-static bool ParseGoogleMockStringFlag(const char* str, const char* flag,
-                                      String* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseGoogleMockFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  *value = value_str;
-  return true;
-}
-
-static bool ParseGoogleMockIntFlag(const char* str, const char* flag,
-                                   int32_t* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseGoogleMockFlagValue(str, flag, true);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  return ParseInt32(Message() << "The value of flag --" << flag,
-                    value_str, value);
-}
-
-// The internal implementation of InitGoogleMock().
-//
-// The type parameter CharType can be instantiated to either char or
-// wchar_t.
-template <typename CharType>
-void InitGoogleMockImpl(int* argc, CharType** argv) {
-  // Makes sure Google Test is initialized.  InitGoogleTest() is
-  // idempotent, so it's fine if the user has already called it.
-  InitGoogleTest(argc, argv);
-  if (*argc <= 0) return;
-
-  for (int i = 1; i != *argc; i++) {
-    const std::string arg_string = StreamableToString(argv[i]);
-    const char* const arg = arg_string.c_str();
-
-    // Do we see a Google Mock flag?
-    if (ParseGoogleMockBoolFlag(arg, "catch_leaked_mocks",
-                                &GMOCK_FLAG(catch_leaked_mocks)) ||
-        ParseGoogleMockStringFlag(arg, "verbose", &GMOCK_FLAG(verbose)) ||
-        ParseGoogleMockIntFlag(arg, "default_mock_behavior",
-                               &GMOCK_FLAG(default_mock_behavior))) {
-      // Yes.  Shift the remainder of the argv list left by one.  Note
-      // that argv has (*argc + 1) elements, the last one always being
-      // NULL.  The following loop moves the trailing NULL element as
-      // well.
-      for (int j = i; j != *argc; j++) {
-        argv[j] = argv[j + 1];
-      }
-
-      // Decrements the argument count.
-      (*argc)--;
-
-      // We also need to decrement the iterator as we just removed
-      // an element.
-      i--;
-    }
-  }
-}
-
-}  // namespace internal
-
-// Initializes Google Mock.  This must be called before running the
-// tests.  In particular, it parses a command line for the flags that
-// Google Mock recognizes.  Whenever a Google Mock flag is seen, it is
-// removed from argv, and *argc is decremented.
-//
-// No value is returned.  Instead, the Google Mock flag variables are
-// updated.
-//
-// Since Google Test is needed for Google Mock to work, this function
-// also initializes Google Test and parses its flags, if that hasn't
-// been done.
-GTEST_API_ void InitGoogleMock(int* argc, char** argv) {
-  internal::InitGoogleMockImpl(argc, argv);
-}
-
-// This overloaded version can be used in Windows programs compiled in
-// UNICODE mode.
-GTEST_API_ void InitGoogleMock(int* argc, wchar_t** argv) {
-  internal::InitGoogleMockImpl(argc, argv);
-}
-
-// This overloaded version can be used on Arduino/embedded platforms where
-// there is no argc/argv.
-GTEST_API_ void InitGoogleMock() {
-  // Since Arduino doesn't have a command line, fake out the argc/argv arguments
-  int argc = 1;
-  const auto arg0 = "dummy";
-  char* argv0 = const_cast<char*>(arg0);
-  char** argv = &argv0;
-
-  internal::InitGoogleMockImpl(&argc, argv);
-}
-
-}  // namespace testing
diff --git a/3rdparty/fmt/test/gtest/gmock/gmock.h b/3rdparty/fmt/test/gtest/gmock/gmock.h
deleted file mode 100644
index d121f7df..00000000
--- a/3rdparty/fmt/test/gtest/gmock/gmock.h
+++ /dev/null
@@ -1,11645 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This is the main header file a user should include.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_H_
-
-// This file implements the following syntax:
-//
-//   ON_CALL(mock_object, Method(...))
-//     .With(...) ?
-//     .WillByDefault(...);
-//
-// where With() is optional and WillByDefault() must appear exactly
-// once.
-//
-//   EXPECT_CALL(mock_object, Method(...))
-//     .With(...) ?
-//     .Times(...) ?
-//     .InSequence(...) *
-//     .WillOnce(...) *
-//     .WillRepeatedly(...) ?
-//     .RetiresOnSaturation() ? ;
-//
-// where all clauses are optional and WillOnce() can be repeated.
-
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// The ACTION* family of macros can be used in a namespace scope to
-// define custom actions easily.  The syntax:
-//
-//   ACTION(name) { statements; }
-//
-// will define an action with the given name that executes the
-// statements.  The value returned by the statements will be used as
-// the return value of the action.  Inside the statements, you can
-// refer to the K-th (0-based) argument of the mock function by
-// 'argK', and refer to its type by 'argK_type'.  For example:
-//
-//   ACTION(IncrementArg1) {
-//     arg1_type temp = arg1;
-//     return ++(*temp);
-//   }
-//
-// allows you to write
-//
-//   ...WillOnce(IncrementArg1());
-//
-// You can also refer to the entire argument tuple and its type by
-// 'args' and 'args_type', and refer to the mock function type and its
-// return type by 'function_type' and 'return_type'.
-//
-// Note that you don't need to specify the types of the mock function
-// arguments.  However rest assured that your code is still type-safe:
-// you'll get a compiler error if *arg1 doesn't support the ++
-// operator, or if the type of ++(*arg1) isn't compatible with the
-// mock function's return type, for example.
-//
-// Sometimes you'll want to parameterize the action.   For that you can use
-// another macro:
-//
-//   ACTION_P(name, param_name) { statements; }
-//
-// For example:
-//
-//   ACTION_P(Add, n) { return arg0 + n; }
-//
-// will allow you to write:
-//
-//   ...WillOnce(Add(5));
-//
-// Note that you don't need to provide the type of the parameter
-// either.  If you need to reference the type of a parameter named
-// 'foo', you can write 'foo_type'.  For example, in the body of
-// ACTION_P(Add, n) above, you can write 'n_type' to refer to the type
-// of 'n'.
-//
-// We also provide ACTION_P2, ACTION_P3, ..., up to ACTION_P10 to support
-// multi-parameter actions.
-//
-// For the purpose of typing, you can view
-//
-//   ACTION_Pk(Foo, p1, ..., pk) { ... }
-//
-// as shorthand for
-//
-//   template <typename p1_type, ..., typename pk_type>
-//   FooActionPk<p1_type, ..., pk_type> Foo(p1_type p1, ..., pk_type pk) { ... }
-//
-// In particular, you can provide the template type arguments
-// explicitly when invoking Foo(), as in Foo<long, bool>(5, false);
-// although usually you can rely on the compiler to infer the types
-// for you automatically.  You can assign the result of expression
-// Foo(p1, ..., pk) to a variable of type FooActionPk<p1_type, ...,
-// pk_type>.  This can be useful when composing actions.
-//
-// You can also overload actions with different numbers of parameters:
-//
-//   ACTION_P(Plus, a) { ... }
-//   ACTION_P2(Plus, a, b) { ... }
-//
-// While it's tempting to always use the ACTION* macros when defining
-// a new action, you should also consider implementing ActionInterface
-// or using MakePolymorphicAction() instead, especially if you need to
-// use the action a lot.  While these approaches require more work,
-// they give you more control on the types of the mock function
-// arguments and the action parameters, which in general leads to
-// better compiler error messages that pay off in the long run.  They
-// also allow overloading actions based on parameter types (as opposed
-// to just based on the number of parameters).
-//
-// CAVEAT:
-//
-// ACTION*() can only be used in a namespace scope as templates cannot be
-// declared inside of a local class.
-// Users can, however, define any local functors (e.g. a lambda) that
-// can be used as actions.
-//
-// MORE INFORMATION:
-//
-// To learn more about using these macros, please search for 'ACTION' on
-// https://github.com/google/googletest/blob/master/docs/gmock_cook_book.md
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_
-
-#ifndef _WIN32_WCE
-# include <errno.h>
-#endif
-
-#include <algorithm>
-#include <functional>
-#include <memory>
-#include <string>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file defines some utilities useful for implementing Google
-// Mock.  They are subject to change without notice, so please DO NOT
-// USE THEM IN USER CODE.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_
-
-#include <stdio.h>
-#include <ostream>  // NOLINT
-#include <string>
-#include <type_traits>
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Low-level types and utilities for porting Google Mock to various
-// platforms.  All macros ending with _ and symbols defined in an
-// internal namespace are subject to change without notice.  Code
-// outside Google Mock MUST NOT USE THEM DIRECTLY.  Macros that don't
-// end with _ are part of Google Mock's public API and can be used by
-// code outside Google Mock.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PORT_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PORT_H_
-
-#include <assert.h>
-#include <stdlib.h>
-#include <cstdint>
-#include <iostream>
-
-// Most of the utilities needed for porting Google Mock are also
-// required for Google Test and are defined in gtest-port.h.
-//
-// Note to maintainers: to reduce code duplication, prefer adding
-// portability utilities to Google Test's gtest-port.h instead of
-// here, as Google Mock depends on Google Test.  Only add a utility
-// here if it's truly specific to Google Mock.
-
-#include "gtest/gtest.h"
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Injection point for custom user configurations. See README for details
-//
-// ** Custom implementation starts here **
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_
-
-// For MS Visual C++, check the compiler version. At least VS 2015 is
-// required to compile Google Mock.
-#if defined(_MSC_VER) && _MSC_VER < 1900
-# error "At least Visual C++ 2015 (14.0) is required to compile Google Mock."
-#endif
-
-// Macro for referencing flags.  This is public as we want the user to
-// use this syntax to reference Google Mock flags.
-#define GMOCK_FLAG(name) FLAGS_gmock_##name
-
-#if !defined(GMOCK_DECLARE_bool_)
-
-// Macros for declaring flags.
-# define GMOCK_DECLARE_bool_(name) extern GTEST_API_ bool GMOCK_FLAG(name)
-# define GMOCK_DECLARE_int32_(name) extern GTEST_API_ int32_t GMOCK_FLAG(name)
-# define GMOCK_DECLARE_string_(name) \
-    extern GTEST_API_ ::std::string GMOCK_FLAG(name)
-
-// Macros for defining flags.
-# define GMOCK_DEFINE_bool_(name, default_val, doc) \
-    GTEST_API_ bool GMOCK_FLAG(name) = (default_val)
-# define GMOCK_DEFINE_int32_(name, default_val, doc) \
-    GTEST_API_ int32_t GMOCK_FLAG(name) = (default_val)
-# define GMOCK_DEFINE_string_(name, default_val, doc) \
-    GTEST_API_ ::std::string GMOCK_FLAG(name) = (default_val)
-
-#endif  // !defined(GMOCK_DECLARE_bool_)
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PORT_H_
-
-namespace testing {
-
-template <typename>
-class Matcher;
-
-namespace internal {
-
-// Silence MSVC C4100 (unreferenced formal parameter) and
-// C4805('==': unsafe mix of type 'const int' and type 'const bool')
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4100)
-# pragma warning(disable:4805)
-#endif
-
-// Joins a vector of strings as if they are fields of a tuple; returns
-// the joined string.
-GTEST_API_ std::string JoinAsTuple(const Strings& fields);
-
-// Converts an identifier name to a space-separated list of lower-case
-// words.  Each maximum substring of the form [A-Za-z][a-z]*|\d+ is
-// treated as one word.  For example, both "FooBar123" and
-// "foo_bar_123" are converted to "foo bar 123".
-GTEST_API_ std::string ConvertIdentifierNameToWords(const char* id_name);
-
-// GetRawPointer(p) returns the raw pointer underlying p when p is a
-// smart pointer, or returns p itself when p is already a raw pointer.
-// The following default implementation is for the smart pointer case.
-template <typename Pointer>
-inline const typename Pointer::element_type* GetRawPointer(const Pointer& p) {
-  return p.get();
-}
-// This overloaded version is for the raw pointer case.
-template <typename Element>
-inline Element* GetRawPointer(Element* p) { return p; }
-
-// MSVC treats wchar_t as a native type usually, but treats it as the
-// same as unsigned short when the compiler option /Zc:wchar_t- is
-// specified.  It defines _NATIVE_WCHAR_T_DEFINED symbol when wchar_t
-// is a native type.
-#if defined(_MSC_VER) && !defined(_NATIVE_WCHAR_T_DEFINED)
-// wchar_t is a typedef.
-#else
-# define GMOCK_WCHAR_T_IS_NATIVE_ 1
-#endif
-
-// In what follows, we use the term "kind" to indicate whether a type
-// is bool, an integer type (excluding bool), a floating-point type,
-// or none of them.  This categorization is useful for determining
-// when a matcher argument type can be safely converted to another
-// type in the implementation of SafeMatcherCast.
-enum TypeKind {
-  kBool, kInteger, kFloatingPoint, kOther
-};
-
-// KindOf<T>::value is the kind of type T.
-template <typename T> struct KindOf {
-  enum { value = kOther };  // The default kind.
-};
-
-// This macro declares that the kind of 'type' is 'kind'.
-#define GMOCK_DECLARE_KIND_(type, kind) \
-  template <> struct KindOf<type> { enum { value = kind }; }
-
-GMOCK_DECLARE_KIND_(bool, kBool);
-
-// All standard integer types.
-GMOCK_DECLARE_KIND_(char, kInteger);
-GMOCK_DECLARE_KIND_(signed char, kInteger);
-GMOCK_DECLARE_KIND_(unsigned char, kInteger);
-GMOCK_DECLARE_KIND_(short, kInteger);  // NOLINT
-GMOCK_DECLARE_KIND_(unsigned short, kInteger);  // NOLINT
-GMOCK_DECLARE_KIND_(int, kInteger);
-GMOCK_DECLARE_KIND_(unsigned int, kInteger);
-GMOCK_DECLARE_KIND_(long, kInteger);  // NOLINT
-GMOCK_DECLARE_KIND_(unsigned long, kInteger);  // NOLINT
-GMOCK_DECLARE_KIND_(long long, kInteger);  // NOLINT
-GMOCK_DECLARE_KIND_(unsigned long long, kInteger);  // NOLINT
-
-#if GMOCK_WCHAR_T_IS_NATIVE_
-GMOCK_DECLARE_KIND_(wchar_t, kInteger);
-#endif
-
-// All standard floating-point types.
-GMOCK_DECLARE_KIND_(float, kFloatingPoint);
-GMOCK_DECLARE_KIND_(double, kFloatingPoint);
-GMOCK_DECLARE_KIND_(long double, kFloatingPoint);
-
-#undef GMOCK_DECLARE_KIND_
-
-// Evaluates to the kind of 'type'.
-#define GMOCK_KIND_OF_(type) \
-  static_cast< ::testing::internal::TypeKind>( \
-      ::testing::internal::KindOf<type>::value)
-
-// LosslessArithmeticConvertibleImpl<kFromKind, From, kToKind, To>::value
-// is true if and only if arithmetic type From can be losslessly converted to
-// arithmetic type To.
-//
-// It's the user's responsibility to ensure that both From and To are
-// raw (i.e. has no CV modifier, is not a pointer, and is not a
-// reference) built-in arithmetic types, kFromKind is the kind of
-// From, and kToKind is the kind of To; the value is
-// implementation-defined when the above pre-condition is violated.
-template <TypeKind kFromKind, typename From, TypeKind kToKind, typename To>
-using LosslessArithmeticConvertibleImpl = std::integral_constant<
-    bool,
-    // clang-format off
-      // Converting from bool is always lossless
-      (kFromKind == kBool) ? true
-      // Converting between any other type kinds will be lossy if the type
-      // kinds are not the same.
-    : (kFromKind != kToKind) ? false
-    : (kFromKind == kInteger &&
-       // Converting between integers of different widths is allowed so long
-       // as the conversion does not go from signed to unsigned.
-      (((sizeof(From) < sizeof(To)) &&
-        !(std::is_signed<From>::value && !std::is_signed<To>::value)) ||
-       // Converting between integers of the same width only requires the
-       // two types to have the same signedness.
-       ((sizeof(From) == sizeof(To)) &&
-        (std::is_signed<From>::value == std::is_signed<To>::value)))
-       ) ? true
-      // Floating point conversions are lossless if and only if `To` is at least
-      // as wide as `From`.
-    : (kFromKind == kFloatingPoint && (sizeof(From) <= sizeof(To))) ? true
-    : false
-    // clang-format on
-    >;
-
-// LosslessArithmeticConvertible<From, To>::value is true if and only if
-// arithmetic type From can be losslessly converted to arithmetic type To.
-//
-// It's the user's responsibility to ensure that both From and To are
-// raw (i.e. has no CV modifier, is not a pointer, and is not a
-// reference) built-in arithmetic types; the value is
-// implementation-defined when the above pre-condition is violated.
-template <typename From, typename To>
-using LosslessArithmeticConvertible =
-    LosslessArithmeticConvertibleImpl<GMOCK_KIND_OF_(From), From,
-                                      GMOCK_KIND_OF_(To), To>;
-
-// This interface knows how to report a Google Mock failure (either
-// non-fatal or fatal).
-class FailureReporterInterface {
- public:
-  // The type of a failure (either non-fatal or fatal).
-  enum FailureType {
-    kNonfatal, kFatal
-  };
-
-  virtual ~FailureReporterInterface() {}
-
-  // Reports a failure that occurred at the given source file location.
-  virtual void ReportFailure(FailureType type, const char* file, int line,
-                             const std::string& message) = 0;
-};
-
-// Returns the failure reporter used by Google Mock.
-GTEST_API_ FailureReporterInterface* GetFailureReporter();
-
-// Asserts that condition is true; aborts the process with the given
-// message if condition is false.  We cannot use LOG(FATAL) or CHECK()
-// as Google Mock might be used to mock the log sink itself.  We
-// inline this function to prevent it from showing up in the stack
-// trace.
-inline void Assert(bool condition, const char* file, int line,
-                   const std::string& msg) {
-  if (!condition) {
-    GetFailureReporter()->ReportFailure(FailureReporterInterface::kFatal,
-                                        file, line, msg);
-  }
-}
-inline void Assert(bool condition, const char* file, int line) {
-  Assert(condition, file, line, "Assertion failed.");
-}
-
-// Verifies that condition is true; generates a non-fatal failure if
-// condition is false.
-inline void Expect(bool condition, const char* file, int line,
-                   const std::string& msg) {
-  if (!condition) {
-    GetFailureReporter()->ReportFailure(FailureReporterInterface::kNonfatal,
-                                        file, line, msg);
-  }
-}
-inline void Expect(bool condition, const char* file, int line) {
-  Expect(condition, file, line, "Expectation failed.");
-}
-
-// Severity level of a log.
-enum LogSeverity {
-  kInfo = 0,
-  kWarning = 1
-};
-
-// Valid values for the --gmock_verbose flag.
-
-// All logs (informational and warnings) are printed.
-const char kInfoVerbosity[] = "info";
-// Only warnings are printed.
-const char kWarningVerbosity[] = "warning";
-// No logs are printed.
-const char kErrorVerbosity[] = "error";
-
-// Returns true if and only if a log with the given severity is visible
-// according to the --gmock_verbose flag.
-GTEST_API_ bool LogIsVisible(LogSeverity severity);
-
-// Prints the given message to stdout if and only if 'severity' >= the level
-// specified by the --gmock_verbose flag.  If stack_frames_to_skip >=
-// 0, also prints the stack trace excluding the top
-// stack_frames_to_skip frames.  In opt mode, any positive
-// stack_frames_to_skip is treated as 0, since we don't know which
-// function calls will be inlined by the compiler and need to be
-// conservative.
-GTEST_API_ void Log(LogSeverity severity, const std::string& message,
-                    int stack_frames_to_skip);
-
-// A marker class that is used to resolve parameterless expectations to the
-// correct overload. This must not be instantiable, to prevent client code from
-// accidentally resolving to the overload; for example:
-//
-//    ON_CALL(mock, Method({}, nullptr))...
-//
-class WithoutMatchers {
- private:
-  WithoutMatchers() {}
-  friend GTEST_API_ WithoutMatchers GetWithoutMatchers();
-};
-
-// Internal use only: access the singleton instance of WithoutMatchers.
-GTEST_API_ WithoutMatchers GetWithoutMatchers();
-
-// Disable MSVC warnings for infinite recursion, since in this case the
-// the recursion is unreachable.
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4717)
-#endif
-
-// Invalid<T>() is usable as an expression of type T, but will terminate
-// the program with an assertion failure if actually run.  This is useful
-// when a value of type T is needed for compilation, but the statement
-// will not really be executed (or we don't care if the statement
-// crashes).
-template <typename T>
-inline T Invalid() {
-  Assert(false, "", -1, "Internal error: attempt to return invalid value");
-  // This statement is unreachable, and would never terminate even if it
-  // could be reached. It is provided only to placate compiler warnings
-  // about missing return statements.
-  return Invalid<T>();
-}
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
-
-// Given a raw type (i.e. having no top-level reference or const
-// modifier) RawContainer that's either an STL-style container or a
-// native array, class StlContainerView<RawContainer> has the
-// following members:
-//
-//   - type is a type that provides an STL-style container view to
-//     (i.e. implements the STL container concept for) RawContainer;
-//   - const_reference is a type that provides a reference to a const
-//     RawContainer;
-//   - ConstReference(raw_container) returns a const reference to an STL-style
-//     container view to raw_container, which is a RawContainer.
-//   - Copy(raw_container) returns an STL-style container view of a
-//     copy of raw_container, which is a RawContainer.
-//
-// This generic version is used when RawContainer itself is already an
-// STL-style container.
-template <class RawContainer>
-class StlContainerView {
- public:
-  typedef RawContainer type;
-  typedef const type& const_reference;
-
-  static const_reference ConstReference(const RawContainer& container) {
-    static_assert(!std::is_const<RawContainer>::value,
-                  "RawContainer type must not be const");
-    return container;
-  }
-  static type Copy(const RawContainer& container) { return container; }
-};
-
-// This specialization is used when RawContainer is a native array type.
-template <typename Element, size_t N>
-class StlContainerView<Element[N]> {
- public:
-  typedef typename std::remove_const<Element>::type RawElement;
-  typedef internal::NativeArray<RawElement> type;
-  // NativeArray<T> can represent a native array either by value or by
-  // reference (selected by a constructor argument), so 'const type'
-  // can be used to reference a const native array.  We cannot
-  // 'typedef const type& const_reference' here, as that would mean
-  // ConstReference() has to return a reference to a local variable.
-  typedef const type const_reference;
-
-  static const_reference ConstReference(const Element (&array)[N]) {
-    static_assert(std::is_same<Element, RawElement>::value,
-                  "Element type must not be const");
-    return type(array, N, RelationToSourceReference());
-  }
-  static type Copy(const Element (&array)[N]) {
-    return type(array, N, RelationToSourceCopy());
-  }
-};
-
-// This specialization is used when RawContainer is a native array
-// represented as a (pointer, size) tuple.
-template <typename ElementPointer, typename Size>
-class StlContainerView< ::std::tuple<ElementPointer, Size> > {
- public:
-  typedef typename std::remove_const<
-      typename std::pointer_traits<ElementPointer>::element_type>::type
-      RawElement;
-  typedef internal::NativeArray<RawElement> type;
-  typedef const type const_reference;
-
-  static const_reference ConstReference(
-      const ::std::tuple<ElementPointer, Size>& array) {
-    return type(std::get<0>(array), std::get<1>(array),
-                RelationToSourceReference());
-  }
-  static type Copy(const ::std::tuple<ElementPointer, Size>& array) {
-    return type(std::get<0>(array), std::get<1>(array), RelationToSourceCopy());
-  }
-};
-
-// The following specialization prevents the user from instantiating
-// StlContainer with a reference type.
-template <typename T> class StlContainerView<T&>;
-
-// A type transform to remove constness from the first part of a pair.
-// Pairs like that are used as the value_type of associative containers,
-// and this transform produces a similar but assignable pair.
-template <typename T>
-struct RemoveConstFromKey {
-  typedef T type;
-};
-
-// Partially specialized to remove constness from std::pair<const K, V>.
-template <typename K, typename V>
-struct RemoveConstFromKey<std::pair<const K, V> > {
-  typedef std::pair<K, V> type;
-};
-
-// Emit an assertion failure due to incorrect DoDefault() usage. Out-of-lined to
-// reduce code size.
-GTEST_API_ void IllegalDoDefault(const char* file, int line);
-
-template <typename F, typename Tuple, size_t... Idx>
-auto ApplyImpl(F&& f, Tuple&& args, IndexSequence<Idx...>) -> decltype(
-    std::forward<F>(f)(std::get<Idx>(std::forward<Tuple>(args))...)) {
-  return std::forward<F>(f)(std::get<Idx>(std::forward<Tuple>(args))...);
-}
-
-// Apply the function to a tuple of arguments.
-template <typename F, typename Tuple>
-auto Apply(F&& f, Tuple&& args) -> decltype(
-    ApplyImpl(std::forward<F>(f), std::forward<Tuple>(args),
-              MakeIndexSequence<std::tuple_size<
-                  typename std::remove_reference<Tuple>::type>::value>())) {
-  return ApplyImpl(std::forward<F>(f), std::forward<Tuple>(args),
-                   MakeIndexSequence<std::tuple_size<
-                       typename std::remove_reference<Tuple>::type>::value>());
-}
-
-// Template struct Function<F>, where F must be a function type, contains
-// the following typedefs:
-//
-//   Result:               the function's return type.
-//   Arg<N>:               the type of the N-th argument, where N starts with 0.
-//   ArgumentTuple:        the tuple type consisting of all parameters of F.
-//   ArgumentMatcherTuple: the tuple type consisting of Matchers for all
-//                         parameters of F.
-//   MakeResultVoid:       the function type obtained by substituting void
-//                         for the return type of F.
-//   MakeResultIgnoredValue:
-//                         the function type obtained by substituting Something
-//                         for the return type of F.
-template <typename T>
-struct Function;
-
-template <typename R, typename... Args>
-struct Function<R(Args...)> {
-  using Result = R;
-  static constexpr size_t ArgumentCount = sizeof...(Args);
-  template <size_t I>
-  using Arg = ElemFromList<I, Args...>;
-  using ArgumentTuple = std::tuple<Args...>;
-  using ArgumentMatcherTuple = std::tuple<Matcher<Args>...>;
-  using MakeResultVoid = void(Args...);
-  using MakeResultIgnoredValue = IgnoredValue(Args...);
-};
-
-template <typename R, typename... Args>
-constexpr size_t Function<R(Args...)>::ArgumentCount;
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PP_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PP_H_
-
-// Expands and concatenates the arguments. Constructed macros reevaluate.
-#define GMOCK_PP_CAT(_1, _2) GMOCK_PP_INTERNAL_CAT(_1, _2)
-
-// Expands and stringifies the only argument.
-#define GMOCK_PP_STRINGIZE(...) GMOCK_PP_INTERNAL_STRINGIZE(__VA_ARGS__)
-
-// Returns empty. Given a variadic number of arguments.
-#define GMOCK_PP_EMPTY(...)
-
-// Returns a comma. Given a variadic number of arguments.
-#define GMOCK_PP_COMMA(...) ,
-
-// Returns the only argument.
-#define GMOCK_PP_IDENTITY(_1) _1
-
-// Evaluates to the number of arguments after expansion.
-//
-//   #define PAIR x, y
-//
-//   GMOCK_PP_NARG() => 1
-//   GMOCK_PP_NARG(x) => 1
-//   GMOCK_PP_NARG(x, y) => 2
-//   GMOCK_PP_NARG(PAIR) => 2
-//
-// Requires: the number of arguments after expansion is at most 15.
-#define GMOCK_PP_NARG(...) \
-  GMOCK_PP_INTERNAL_16TH(  \
-      (__VA_ARGS__, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0))
-
-// Returns 1 if the expansion of arguments has an unprotected comma. Otherwise
-// returns 0. Requires no more than 15 unprotected commas.
-#define GMOCK_PP_HAS_COMMA(...) \
-  GMOCK_PP_INTERNAL_16TH(       \
-      (__VA_ARGS__, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0))
-
-// Returns the first argument.
-#define GMOCK_PP_HEAD(...) GMOCK_PP_INTERNAL_HEAD((__VA_ARGS__, unusedArg))
-
-// Returns the tail. A variadic list of all arguments minus the first. Requires
-// at least one argument.
-#define GMOCK_PP_TAIL(...) GMOCK_PP_INTERNAL_TAIL((__VA_ARGS__))
-
-// Calls CAT(_Macro, NARG(__VA_ARGS__))(__VA_ARGS__)
-#define GMOCK_PP_VARIADIC_CALL(_Macro, ...) \
-  GMOCK_PP_IDENTITY(                        \
-      GMOCK_PP_CAT(_Macro, GMOCK_PP_NARG(__VA_ARGS__))(__VA_ARGS__))
-
-// If the arguments after expansion have no tokens, evaluates to `1`. Otherwise
-// evaluates to `0`.
-//
-// Requires: * the number of arguments after expansion is at most 15.
-//           * If the argument is a macro, it must be able to be called with one
-//             argument.
-//
-// Implementation details:
-//
-// There is one case when it generates a compile error: if the argument is macro
-// that cannot be called with one argument.
-//
-//   #define M(a, b)  // it doesn't matter what it expands to
-//
-//   // Expected: expands to `0`.
-//   // Actual: compile error.
-//   GMOCK_PP_IS_EMPTY(M)
-//
-// There are 4 cases tested:
-//
-// * __VA_ARGS__ possible expansion has no unparen'd commas. Expected 0.
-// * __VA_ARGS__ possible expansion is not enclosed in parenthesis. Expected 0.
-// * __VA_ARGS__ possible expansion is not a macro that ()-evaluates to a comma.
-//   Expected 0
-// * __VA_ARGS__ is empty, or has unparen'd commas, or is enclosed in
-//   parenthesis, or is a macro that ()-evaluates to comma. Expected 1.
-//
-// We trigger detection on '0001', i.e. on empty.
-#define GMOCK_PP_IS_EMPTY(...)                                               \
-  GMOCK_PP_INTERNAL_IS_EMPTY(GMOCK_PP_HAS_COMMA(__VA_ARGS__),                \
-                             GMOCK_PP_HAS_COMMA(GMOCK_PP_COMMA __VA_ARGS__), \
-                             GMOCK_PP_HAS_COMMA(__VA_ARGS__()),              \
-                             GMOCK_PP_HAS_COMMA(GMOCK_PP_COMMA __VA_ARGS__()))
-
-// Evaluates to _Then if _Cond is 1 and _Else if _Cond is 0.
-#define GMOCK_PP_IF(_Cond, _Then, _Else) \
-  GMOCK_PP_CAT(GMOCK_PP_INTERNAL_IF_, _Cond)(_Then, _Else)
-
-// Similar to GMOCK_PP_IF but takes _Then and _Else in parentheses.
-//
-// GMOCK_PP_GENERIC_IF(1, (a, b, c), (d, e, f)) => a, b, c
-// GMOCK_PP_GENERIC_IF(0, (a, b, c), (d, e, f)) => d, e, f
-//
-#define GMOCK_PP_GENERIC_IF(_Cond, _Then, _Else) \
-  GMOCK_PP_REMOVE_PARENS(GMOCK_PP_IF(_Cond, _Then, _Else))
-
-// Evaluates to the number of arguments after expansion. Identifies 'empty' as
-// 0.
-//
-//   #define PAIR x, y
-//
-//   GMOCK_PP_NARG0() => 0
-//   GMOCK_PP_NARG0(x) => 1
-//   GMOCK_PP_NARG0(x, y) => 2
-//   GMOCK_PP_NARG0(PAIR) => 2
-//
-// Requires: * the number of arguments after expansion is at most 15.
-//           * If the argument is a macro, it must be able to be called with one
-//             argument.
-#define GMOCK_PP_NARG0(...) \
-  GMOCK_PP_IF(GMOCK_PP_IS_EMPTY(__VA_ARGS__), 0, GMOCK_PP_NARG(__VA_ARGS__))
-
-// Expands to 1 if the first argument starts with something in parentheses,
-// otherwise to 0.
-#define GMOCK_PP_IS_BEGIN_PARENS(...)                              \
-  GMOCK_PP_HEAD(GMOCK_PP_CAT(GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_, \
-                             GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C __VA_ARGS__))
-
-// Expands to 1 is there is only one argument and it is enclosed in parentheses.
-#define GMOCK_PP_IS_ENCLOSED_PARENS(...)             \
-  GMOCK_PP_IF(GMOCK_PP_IS_BEGIN_PARENS(__VA_ARGS__), \
-              GMOCK_PP_IS_EMPTY(GMOCK_PP_EMPTY __VA_ARGS__), 0)
-
-// Remove the parens, requires GMOCK_PP_IS_ENCLOSED_PARENS(args) => 1.
-#define GMOCK_PP_REMOVE_PARENS(...) GMOCK_PP_INTERNAL_REMOVE_PARENS __VA_ARGS__
-
-// Expands to _Macro(0, _Data, e1) _Macro(1, _Data, e2) ... _Macro(K -1, _Data,
-// eK) as many of GMOCK_INTERNAL_NARG0 _Tuple.
-// Requires: * |_Macro| can be called with 3 arguments.
-//           * |_Tuple| expansion has no more than 15 elements.
-#define GMOCK_PP_FOR_EACH(_Macro, _Data, _Tuple)                        \
-  GMOCK_PP_CAT(GMOCK_PP_INTERNAL_FOR_EACH_IMPL_, GMOCK_PP_NARG0 _Tuple) \
-  (0, _Macro, _Data, _Tuple)
-
-// Expands to _Macro(0, _Data, ) _Macro(1, _Data, ) ... _Macro(K - 1, _Data, )
-// Empty if _K = 0.
-// Requires: * |_Macro| can be called with 3 arguments.
-//           * |_K| literal between 0 and 15
-#define GMOCK_PP_REPEAT(_Macro, _Data, _N)           \
-  GMOCK_PP_CAT(GMOCK_PP_INTERNAL_FOR_EACH_IMPL_, _N) \
-  (0, _Macro, _Data, GMOCK_PP_INTENRAL_EMPTY_TUPLE)
-
-// Increments the argument, requires the argument to be between 0 and 15.
-#define GMOCK_PP_INC(_i) GMOCK_PP_CAT(GMOCK_PP_INTERNAL_INC_, _i)
-
-// Returns comma if _i != 0. Requires _i to be between 0 and 15.
-#define GMOCK_PP_COMMA_IF(_i) GMOCK_PP_CAT(GMOCK_PP_INTERNAL_COMMA_IF_, _i)
-
-// Internal details follow. Do not use any of these symbols outside of this
-// file or we will break your code.
-#define GMOCK_PP_INTENRAL_EMPTY_TUPLE (, , , , , , , , , , , , , , , )
-#define GMOCK_PP_INTERNAL_CAT(_1, _2) _1##_2
-#define GMOCK_PP_INTERNAL_STRINGIZE(...) #__VA_ARGS__
-#define GMOCK_PP_INTERNAL_CAT_5(_1, _2, _3, _4, _5) _1##_2##_3##_4##_5
-#define GMOCK_PP_INTERNAL_IS_EMPTY(_1, _2, _3, _4)                             \
-  GMOCK_PP_HAS_COMMA(GMOCK_PP_INTERNAL_CAT_5(GMOCK_PP_INTERNAL_IS_EMPTY_CASE_, \
-                                             _1, _2, _3, _4))
-#define GMOCK_PP_INTERNAL_IS_EMPTY_CASE_0001 ,
-#define GMOCK_PP_INTERNAL_IF_1(_Then, _Else) _Then
-#define GMOCK_PP_INTERNAL_IF_0(_Then, _Else) _Else
-
-// Because of MSVC treating a token with a comma in it as a single token when
-// passed to another macro, we need to force it to evaluate it as multiple
-// tokens. We do that by using a "IDENTITY(MACRO PARENTHESIZED_ARGS)" macro. We
-// define one per possible macro that relies on this behavior. Note "_Args" must
-// be parenthesized.
-#define GMOCK_PP_INTERNAL_INTERNAL_16TH(_1, _2, _3, _4, _5, _6, _7, _8, _9, \
-                                        _10, _11, _12, _13, _14, _15, _16,  \
-                                        ...)                                \
-  _16
-#define GMOCK_PP_INTERNAL_16TH(_Args) \
-  GMOCK_PP_IDENTITY(GMOCK_PP_INTERNAL_INTERNAL_16TH _Args)
-#define GMOCK_PP_INTERNAL_INTERNAL_HEAD(_1, ...) _1
-#define GMOCK_PP_INTERNAL_HEAD(_Args) \
-  GMOCK_PP_IDENTITY(GMOCK_PP_INTERNAL_INTERNAL_HEAD _Args)
-#define GMOCK_PP_INTERNAL_INTERNAL_TAIL(_1, ...) __VA_ARGS__
-#define GMOCK_PP_INTERNAL_TAIL(_Args) \
-  GMOCK_PP_IDENTITY(GMOCK_PP_INTERNAL_INTERNAL_TAIL _Args)
-
-#define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C(...) 1 _
-#define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_1 1,
-#define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C \
-  0,
-#define GMOCK_PP_INTERNAL_REMOVE_PARENS(...) __VA_ARGS__
-#define GMOCK_PP_INTERNAL_INC_0 1
-#define GMOCK_PP_INTERNAL_INC_1 2
-#define GMOCK_PP_INTERNAL_INC_2 3
-#define GMOCK_PP_INTERNAL_INC_3 4
-#define GMOCK_PP_INTERNAL_INC_4 5
-#define GMOCK_PP_INTERNAL_INC_5 6
-#define GMOCK_PP_INTERNAL_INC_6 7
-#define GMOCK_PP_INTERNAL_INC_7 8
-#define GMOCK_PP_INTERNAL_INC_8 9
-#define GMOCK_PP_INTERNAL_INC_9 10
-#define GMOCK_PP_INTERNAL_INC_10 11
-#define GMOCK_PP_INTERNAL_INC_11 12
-#define GMOCK_PP_INTERNAL_INC_12 13
-#define GMOCK_PP_INTERNAL_INC_13 14
-#define GMOCK_PP_INTERNAL_INC_14 15
-#define GMOCK_PP_INTERNAL_INC_15 16
-#define GMOCK_PP_INTERNAL_COMMA_IF_0
-#define GMOCK_PP_INTERNAL_COMMA_IF_1 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_2 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_3 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_4 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_5 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_6 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_7 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_8 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_9 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_10 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_11 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_12 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_13 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_14 ,
-#define GMOCK_PP_INTERNAL_COMMA_IF_15 ,
-#define GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, _element) \
-  _Macro(_i, _Data, _element)
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_0(_i, _Macro, _Data, _Tuple)
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_1(_i, _Macro, _Data, _Tuple) \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple)
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_2(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_1(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_3(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_2(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_4(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_3(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_5(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_4(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_6(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_5(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_7(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_6(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_8(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_7(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_9(_i, _Macro, _Data, _Tuple)    \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_8(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_10(_i, _Macro, _Data, _Tuple)   \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_9(GMOCK_PP_INC(_i), _Macro, _Data,    \
-                                    (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_11(_i, _Macro, _Data, _Tuple)   \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_10(GMOCK_PP_INC(_i), _Macro, _Data,   \
-                                     (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_12(_i, _Macro, _Data, _Tuple)   \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_11(GMOCK_PP_INC(_i), _Macro, _Data,   \
-                                     (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_13(_i, _Macro, _Data, _Tuple)   \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_12(GMOCK_PP_INC(_i), _Macro, _Data,   \
-                                     (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_14(_i, _Macro, _Data, _Tuple)   \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_13(GMOCK_PP_INC(_i), _Macro, _Data,   \
-                                     (GMOCK_PP_TAIL _Tuple))
-#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_15(_i, _Macro, _Data, _Tuple)   \
-  GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \
-  GMOCK_PP_INTERNAL_FOR_EACH_IMPL_14(GMOCK_PP_INC(_i), _Macro, _Data,   \
-                                     (GMOCK_PP_TAIL _Tuple))
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PP_H_
-
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4100)
-#endif
-
-namespace testing {
-
-// To implement an action Foo, define:
-//   1. a class FooAction that implements the ActionInterface interface, and
-//   2. a factory function that creates an Action object from a
-//      const FooAction*.
-//
-// The two-level delegation design follows that of Matcher, providing
-// consistency for extension developers.  It also eases ownership
-// management as Action objects can now be copied like plain values.
-
-namespace internal {
-
-// BuiltInDefaultValueGetter<T, true>::Get() returns a
-// default-constructed T value.  BuiltInDefaultValueGetter<T,
-// false>::Get() crashes with an error.
-//
-// This primary template is used when kDefaultConstructible is true.
-template <typename T, bool kDefaultConstructible>
-struct BuiltInDefaultValueGetter {
-  static T Get() { return T(); }
-};
-template <typename T>
-struct BuiltInDefaultValueGetter<T, false> {
-  static T Get() {
-    Assert(false, __FILE__, __LINE__,
-           "Default action undefined for the function return type.");
-    return internal::Invalid<T>();
-    // The above statement will never be reached, but is required in
-    // order for this function to compile.
-  }
-};
-
-// BuiltInDefaultValue<T>::Get() returns the "built-in" default value
-// for type T, which is NULL when T is a raw pointer type, 0 when T is
-// a numeric type, false when T is bool, or "" when T is string or
-// std::string.  In addition, in C++11 and above, it turns a
-// default-constructed T value if T is default constructible.  For any
-// other type T, the built-in default T value is undefined, and the
-// function will abort the process.
-template <typename T>
-class BuiltInDefaultValue {
- public:
-  // This function returns true if and only if type T has a built-in default
-  // value.
-  static bool Exists() {
-    return ::std::is_default_constructible<T>::value;
-  }
-
-  static T Get() {
-    return BuiltInDefaultValueGetter<
-        T, ::std::is_default_constructible<T>::value>::Get();
-  }
-};
-
-// This partial specialization says that we use the same built-in
-// default value for T and const T.
-template <typename T>
-class BuiltInDefaultValue<const T> {
- public:
-  static bool Exists() { return BuiltInDefaultValue<T>::Exists(); }
-  static T Get() { return BuiltInDefaultValue<T>::Get(); }
-};
-
-// This partial specialization defines the default values for pointer
-// types.
-template <typename T>
-class BuiltInDefaultValue<T*> {
- public:
-  static bool Exists() { return true; }
-  static T* Get() { return nullptr; }
-};
-
-// The following specializations define the default values for
-// specific types we care about.
-#define GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(type, value) \
-  template <> \
-  class BuiltInDefaultValue<type> { \
-   public: \
-    static bool Exists() { return true; } \
-    static type Get() { return value; } \
-  }
-
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(void, );  // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(::std::string, "");
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(bool, false);
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned char, '\0');
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed char, '\0');
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(char, '\0');
-
-// There's no need for a default action for signed wchar_t, as that
-// type is the same as wchar_t for gcc, and invalid for MSVC.
-//
-// There's also no need for a default action for unsigned wchar_t, as
-// that type is the same as unsigned int for gcc, and invalid for
-// MSVC.
-#if GMOCK_WCHAR_T_IS_NATIVE_
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(wchar_t, 0U);  // NOLINT
-#endif
-
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned short, 0U);  // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed short, 0);     // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned int, 0U);
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed int, 0);
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned long, 0UL);  // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed long, 0L);     // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned long long, 0);  // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed long long, 0);  // NOLINT
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(float, 0);
-GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(double, 0);
-
-#undef GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_
-
-// Simple two-arg form of std::disjunction.
-template <typename P, typename Q>
-using disjunction = typename ::std::conditional<P::value, P, Q>::type;
-
-}  // namespace internal
-
-// When an unexpected function call is encountered, Google Mock will
-// let it return a default value if the user has specified one for its
-// return type, or if the return type has a built-in default value;
-// otherwise Google Mock won't know what value to return and will have
-// to abort the process.
-//
-// The DefaultValue<T> class allows a user to specify the
-// default value for a type T that is both copyable and publicly
-// destructible (i.e. anything that can be used as a function return
-// type).  The usage is:
-//
-//   // Sets the default value for type T to be foo.
-//   DefaultValue<T>::Set(foo);
-template <typename T>
-class DefaultValue {
- public:
-  // Sets the default value for type T; requires T to be
-  // copy-constructable and have a public destructor.
-  static void Set(T x) {
-    delete producer_;
-    producer_ = new FixedValueProducer(x);
-  }
-
-  // Provides a factory function to be called to generate the default value.
-  // This method can be used even if T is only move-constructible, but it is not
-  // limited to that case.
-  typedef T (*FactoryFunction)();
-  static void SetFactory(FactoryFunction factory) {
-    delete producer_;
-    producer_ = new FactoryValueProducer(factory);
-  }
-
-  // Unsets the default value for type T.
-  static void Clear() {
-    delete producer_;
-    producer_ = nullptr;
-  }
-
-  // Returns true if and only if the user has set the default value for type T.
-  static bool IsSet() { return producer_ != nullptr; }
-
-  // Returns true if T has a default return value set by the user or there
-  // exists a built-in default value.
-  static bool Exists() {
-    return IsSet() || internal::BuiltInDefaultValue<T>::Exists();
-  }
-
-  // Returns the default value for type T if the user has set one;
-  // otherwise returns the built-in default value. Requires that Exists()
-  // is true, which ensures that the return value is well-defined.
-  static T Get() {
-    return producer_ == nullptr ? internal::BuiltInDefaultValue<T>::Get()
-                                : producer_->Produce();
-  }
-
- private:
-  class ValueProducer {
-   public:
-    virtual ~ValueProducer() {}
-    virtual T Produce() = 0;
-  };
-
-  class FixedValueProducer : public ValueProducer {
-   public:
-    explicit FixedValueProducer(T value) : value_(value) {}
-    T Produce() override { return value_; }
-
-   private:
-    const T value_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(FixedValueProducer);
-  };
-
-  class FactoryValueProducer : public ValueProducer {
-   public:
-    explicit FactoryValueProducer(FactoryFunction factory)
-        : factory_(factory) {}
-    T Produce() override { return factory_(); }
-
-   private:
-    const FactoryFunction factory_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(FactoryValueProducer);
-  };
-
-  static ValueProducer* producer_;
-};
-
-// This partial specialization allows a user to set default values for
-// reference types.
-template <typename T>
-class DefaultValue<T&> {
- public:
-  // Sets the default value for type T&.
-  static void Set(T& x) {  // NOLINT
-    address_ = &x;
-  }
-
-  // Unsets the default value for type T&.
-  static void Clear() { address_ = nullptr; }
-
-  // Returns true if and only if the user has set the default value for type T&.
-  static bool IsSet() { return address_ != nullptr; }
-
-  // Returns true if T has a default return value set by the user or there
-  // exists a built-in default value.
-  static bool Exists() {
-    return IsSet() || internal::BuiltInDefaultValue<T&>::Exists();
-  }
-
-  // Returns the default value for type T& if the user has set one;
-  // otherwise returns the built-in default value if there is one;
-  // otherwise aborts the process.
-  static T& Get() {
-    return address_ == nullptr ? internal::BuiltInDefaultValue<T&>::Get()
-                               : *address_;
-  }
-
- private:
-  static T* address_;
-};
-
-// This specialization allows DefaultValue<void>::Get() to
-// compile.
-template <>
-class DefaultValue<void> {
- public:
-  static bool Exists() { return true; }
-  static void Get() {}
-};
-
-// Points to the user-set default value for type T.
-template <typename T>
-typename DefaultValue<T>::ValueProducer* DefaultValue<T>::producer_ = nullptr;
-
-// Points to the user-set default value for type T&.
-template <typename T>
-T* DefaultValue<T&>::address_ = nullptr;
-
-// Implement this interface to define an action for function type F.
-template <typename F>
-class ActionInterface {
- public:
-  typedef typename internal::Function<F>::Result Result;
-  typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
-
-  ActionInterface() {}
-  virtual ~ActionInterface() {}
-
-  // Performs the action.  This method is not const, as in general an
-  // action can have side effects and be stateful.  For example, a
-  // get-the-next-element-from-the-collection action will need to
-  // remember the current element.
-  virtual Result Perform(const ArgumentTuple& args) = 0;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ActionInterface);
-};
-
-// An Action<F> is a copyable and IMMUTABLE (except by assignment)
-// object that represents an action to be taken when a mock function
-// of type F is called.  The implementation of Action<T> is just a
-// std::shared_ptr to const ActionInterface<T>. Don't inherit from Action!
-// You can view an object implementing ActionInterface<F> as a
-// concrete action (including its current state), and an Action<F>
-// object as a handle to it.
-template <typename F>
-class Action {
-  // Adapter class to allow constructing Action from a legacy ActionInterface.
-  // New code should create Actions from functors instead.
-  struct ActionAdapter {
-    // Adapter must be copyable to satisfy std::function requirements.
-    ::std::shared_ptr<ActionInterface<F>> impl_;
-
-    template <typename... Args>
-    typename internal::Function<F>::Result operator()(Args&&... args) {
-      return impl_->Perform(
-          ::std::forward_as_tuple(::std::forward<Args>(args)...));
-    }
-  };
-
-  template <typename G>
-  using IsCompatibleFunctor = std::is_constructible<std::function<F>, G>;
-
- public:
-  typedef typename internal::Function<F>::Result Result;
-  typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
-
-  // Constructs a null Action.  Needed for storing Action objects in
-  // STL containers.
-  Action() {}
-
-  // Construct an Action from a specified callable.
-  // This cannot take std::function directly, because then Action would not be
-  // directly constructible from lambda (it would require two conversions).
-  template <
-      typename G,
-      typename = typename std::enable_if<internal::disjunction<
-          IsCompatibleFunctor<G>, std::is_constructible<std::function<Result()>,
-                                                        G>>::value>::type>
-  Action(G&& fun) {  // NOLINT
-    Init(::std::forward<G>(fun), IsCompatibleFunctor<G>());
-  }
-
-  // Constructs an Action from its implementation.
-  explicit Action(ActionInterface<F>* impl)
-      : fun_(ActionAdapter{::std::shared_ptr<ActionInterface<F>>(impl)}) {}
-
-  // This constructor allows us to turn an Action<Func> object into an
-  // Action<F>, as long as F's arguments can be implicitly converted
-  // to Func's and Func's return type can be implicitly converted to F's.
-  template <typename Func>
-  explicit Action(const Action<Func>& action) : fun_(action.fun_) {}
-
-  // Returns true if and only if this is the DoDefault() action.
-  bool IsDoDefault() const { return fun_ == nullptr; }
-
-  // Performs the action.  Note that this method is const even though
-  // the corresponding method in ActionInterface is not.  The reason
-  // is that a const Action<F> means that it cannot be re-bound to
-  // another concrete action, not that the concrete action it binds to
-  // cannot change state.  (Think of the difference between a const
-  // pointer and a pointer to const.)
-  Result Perform(ArgumentTuple args) const {
-    if (IsDoDefault()) {
-      internal::IllegalDoDefault(__FILE__, __LINE__);
-    }
-    return internal::Apply(fun_, ::std::move(args));
-  }
-
- private:
-  template <typename G>
-  friend class Action;
-
-  template <typename G>
-  void Init(G&& g, ::std::true_type) {
-    fun_ = ::std::forward<G>(g);
-  }
-
-  template <typename G>
-  void Init(G&& g, ::std::false_type) {
-    fun_ = IgnoreArgs<typename ::std::decay<G>::type>{::std::forward<G>(g)};
-  }
-
-  template <typename FunctionImpl>
-  struct IgnoreArgs {
-    template <typename... Args>
-    Result operator()(const Args&...) const {
-      return function_impl();
-    }
-
-    FunctionImpl function_impl;
-  };
-
-  // fun_ is an empty function if and only if this is the DoDefault() action.
-  ::std::function<F> fun_;
-};
-
-// The PolymorphicAction class template makes it easy to implement a
-// polymorphic action (i.e. an action that can be used in mock
-// functions of than one type, e.g. Return()).
-//
-// To define a polymorphic action, a user first provides a COPYABLE
-// implementation class that has a Perform() method template:
-//
-//   class FooAction {
-//    public:
-//     template <typename Result, typename ArgumentTuple>
-//     Result Perform(const ArgumentTuple& args) const {
-//       // Processes the arguments and returns a result, using
-//       // std::get<N>(args) to get the N-th (0-based) argument in the tuple.
-//     }
-//     ...
-//   };
-//
-// Then the user creates the polymorphic action using
-// MakePolymorphicAction(object) where object has type FooAction.  See
-// the definition of Return(void) and SetArgumentPointee<N>(value) for
-// complete examples.
-template <typename Impl>
-class PolymorphicAction {
- public:
-  explicit PolymorphicAction(const Impl& impl) : impl_(impl) {}
-
-  template <typename F>
-  operator Action<F>() const {
-    return Action<F>(new MonomorphicImpl<F>(impl_));
-  }
-
- private:
-  template <typename F>
-  class MonomorphicImpl : public ActionInterface<F> {
-   public:
-    typedef typename internal::Function<F>::Result Result;
-    typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
-
-    explicit MonomorphicImpl(const Impl& impl) : impl_(impl) {}
-
-    Result Perform(const ArgumentTuple& args) override {
-      return impl_.template Perform<Result>(args);
-    }
-
-   private:
-    Impl impl_;
-  };
-
-  Impl impl_;
-};
-
-// Creates an Action from its implementation and returns it.  The
-// created Action object owns the implementation.
-template <typename F>
-Action<F> MakeAction(ActionInterface<F>* impl) {
-  return Action<F>(impl);
-}
-
-// Creates a polymorphic action from its implementation.  This is
-// easier to use than the PolymorphicAction<Impl> constructor as it
-// doesn't require you to explicitly write the template argument, e.g.
-//
-//   MakePolymorphicAction(foo);
-// vs
-//   PolymorphicAction<TypeOfFoo>(foo);
-template <typename Impl>
-inline PolymorphicAction<Impl> MakePolymorphicAction(const Impl& impl) {
-  return PolymorphicAction<Impl>(impl);
-}
-
-namespace internal {
-
-// Helper struct to specialize ReturnAction to execute a move instead of a copy
-// on return. Useful for move-only types, but could be used on any type.
-template <typename T>
-struct ByMoveWrapper {
-  explicit ByMoveWrapper(T value) : payload(std::move(value)) {}
-  T payload;
-};
-
-// Implements the polymorphic Return(x) action, which can be used in
-// any function that returns the type of x, regardless of the argument
-// types.
-//
-// Note: The value passed into Return must be converted into
-// Function<F>::Result when this action is cast to Action<F> rather than
-// when that action is performed. This is important in scenarios like
-//
-// MOCK_METHOD1(Method, T(U));
-// ...
-// {
-//   Foo foo;
-//   X x(&foo);
-//   EXPECT_CALL(mock, Method(_)).WillOnce(Return(x));
-// }
-//
-// In the example above the variable x holds reference to foo which leaves
-// scope and gets destroyed.  If copying X just copies a reference to foo,
-// that copy will be left with a hanging reference.  If conversion to T
-// makes a copy of foo, the above code is safe. To support that scenario, we
-// need to make sure that the type conversion happens inside the EXPECT_CALL
-// statement, and conversion of the result of Return to Action<T(U)> is a
-// good place for that.
-//
-// The real life example of the above scenario happens when an invocation
-// of gtl::Container() is passed into Return.
-//
-template <typename R>
-class ReturnAction {
- public:
-  // Constructs a ReturnAction object from the value to be returned.
-  // 'value' is passed by value instead of by const reference in order
-  // to allow Return("string literal") to compile.
-  explicit ReturnAction(R value) : value_(new R(std::move(value))) {}
-
-  // This template type conversion operator allows Return(x) to be
-  // used in ANY function that returns x's type.
-  template <typename F>
-  operator Action<F>() const {  // NOLINT
-    // Assert statement belongs here because this is the best place to verify
-    // conditions on F. It produces the clearest error messages
-    // in most compilers.
-    // Impl really belongs in this scope as a local class but can't
-    // because MSVC produces duplicate symbols in different translation units
-    // in this case. Until MS fixes that bug we put Impl into the class scope
-    // and put the typedef both here (for use in assert statement) and
-    // in the Impl class. But both definitions must be the same.
-    typedef typename Function<F>::Result Result;
-    GTEST_COMPILE_ASSERT_(
-        !std::is_reference<Result>::value,
-        use_ReturnRef_instead_of_Return_to_return_a_reference);
-    static_assert(!std::is_void<Result>::value,
-                  "Can't use Return() on an action expected to return `void`.");
-    return Action<F>(new Impl<R, F>(value_));
-  }
-
- private:
-  // Implements the Return(x) action for a particular function type F.
-  template <typename R_, typename F>
-  class Impl : public ActionInterface<F> {
-   public:
-    typedef typename Function<F>::Result Result;
-    typedef typename Function<F>::ArgumentTuple ArgumentTuple;
-
-    // The implicit cast is necessary when Result has more than one
-    // single-argument constructor (e.g. Result is std::vector<int>) and R
-    // has a type conversion operator template.  In that case, value_(value)
-    // won't compile as the compiler doesn't known which constructor of
-    // Result to call.  ImplicitCast_ forces the compiler to convert R to
-    // Result without considering explicit constructors, thus resolving the
-    // ambiguity. value_ is then initialized using its copy constructor.
-    explicit Impl(const std::shared_ptr<R>& value)
-        : value_before_cast_(*value),
-          value_(ImplicitCast_<Result>(value_before_cast_)) {}
-
-    Result Perform(const ArgumentTuple&) override { return value_; }
-
-   private:
-    GTEST_COMPILE_ASSERT_(!std::is_reference<Result>::value,
-                          Result_cannot_be_a_reference_type);
-    // We save the value before casting just in case it is being cast to a
-    // wrapper type.
-    R value_before_cast_;
-    Result value_;
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(Impl);
-  };
-
-  // Partially specialize for ByMoveWrapper. This version of ReturnAction will
-  // move its contents instead.
-  template <typename R_, typename F>
-  class Impl<ByMoveWrapper<R_>, F> : public ActionInterface<F> {
-   public:
-    typedef typename Function<F>::Result Result;
-    typedef typename Function<F>::ArgumentTuple ArgumentTuple;
-
-    explicit Impl(const std::shared_ptr<R>& wrapper)
-        : performed_(false), wrapper_(wrapper) {}
-
-    Result Perform(const ArgumentTuple&) override {
-      GTEST_CHECK_(!performed_)
-          << "A ByMove() action should only be performed once.";
-      performed_ = true;
-      return std::move(wrapper_->payload);
-    }
-
-   private:
-    bool performed_;
-    const std::shared_ptr<R> wrapper_;
-  };
-
-  const std::shared_ptr<R> value_;
-};
-
-// Implements the ReturnNull() action.
-class ReturnNullAction {
- public:
-  // Allows ReturnNull() to be used in any pointer-returning function. In C++11
-  // this is enforced by returning nullptr, and in non-C++11 by asserting a
-  // pointer type on compile time.
-  template <typename Result, typename ArgumentTuple>
-  static Result Perform(const ArgumentTuple&) {
-    return nullptr;
-  }
-};
-
-// Implements the Return() action.
-class ReturnVoidAction {
- public:
-  // Allows Return() to be used in any void-returning function.
-  template <typename Result, typename ArgumentTuple>
-  static void Perform(const ArgumentTuple&) {
-    static_assert(std::is_void<Result>::value, "Result should be void.");
-  }
-};
-
-// Implements the polymorphic ReturnRef(x) action, which can be used
-// in any function that returns a reference to the type of x,
-// regardless of the argument types.
-template <typename T>
-class ReturnRefAction {
- public:
-  // Constructs a ReturnRefAction object from the reference to be returned.
-  explicit ReturnRefAction(T& ref) : ref_(ref) {}  // NOLINT
-
-  // This template type conversion operator allows ReturnRef(x) to be
-  // used in ANY function that returns a reference to x's type.
-  template <typename F>
-  operator Action<F>() const {
-    typedef typename Function<F>::Result Result;
-    // Asserts that the function return type is a reference.  This
-    // catches the user error of using ReturnRef(x) when Return(x)
-    // should be used, and generates some helpful error message.
-    GTEST_COMPILE_ASSERT_(std::is_reference<Result>::value,
-                          use_Return_instead_of_ReturnRef_to_return_a_value);
-    return Action<F>(new Impl<F>(ref_));
-  }
-
- private:
-  // Implements the ReturnRef(x) action for a particular function type F.
-  template <typename F>
-  class Impl : public ActionInterface<F> {
-   public:
-    typedef typename Function<F>::Result Result;
-    typedef typename Function<F>::ArgumentTuple ArgumentTuple;
-
-    explicit Impl(T& ref) : ref_(ref) {}  // NOLINT
-
-    Result Perform(const ArgumentTuple&) override { return ref_; }
-
-   private:
-    T& ref_;
-  };
-
-  T& ref_;
-};
-
-// Implements the polymorphic ReturnRefOfCopy(x) action, which can be
-// used in any function that returns a reference to the type of x,
-// regardless of the argument types.
-template <typename T>
-class ReturnRefOfCopyAction {
- public:
-  // Constructs a ReturnRefOfCopyAction object from the reference to
-  // be returned.
-  explicit ReturnRefOfCopyAction(const T& value) : value_(value) {}  // NOLINT
-
-  // This template type conversion operator allows ReturnRefOfCopy(x) to be
-  // used in ANY function that returns a reference to x's type.
-  template <typename F>
-  operator Action<F>() const {
-    typedef typename Function<F>::Result Result;
-    // Asserts that the function return type is a reference.  This
-    // catches the user error of using ReturnRefOfCopy(x) when Return(x)
-    // should be used, and generates some helpful error message.
-    GTEST_COMPILE_ASSERT_(
-        std::is_reference<Result>::value,
-        use_Return_instead_of_ReturnRefOfCopy_to_return_a_value);
-    return Action<F>(new Impl<F>(value_));
-  }
-
- private:
-  // Implements the ReturnRefOfCopy(x) action for a particular function type F.
-  template <typename F>
-  class Impl : public ActionInterface<F> {
-   public:
-    typedef typename Function<F>::Result Result;
-    typedef typename Function<F>::ArgumentTuple ArgumentTuple;
-
-    explicit Impl(const T& value) : value_(value) {}  // NOLINT
-
-    Result Perform(const ArgumentTuple&) override { return value_; }
-
-   private:
-    T value_;
-  };
-
-  const T value_;
-};
-
-// Implements the polymorphic ReturnRoundRobin(v) action, which can be
-// used in any function that returns the element_type of v.
-template <typename T>
-class ReturnRoundRobinAction {
- public:
-  explicit ReturnRoundRobinAction(std::vector<T> values) {
-    GTEST_CHECK_(!values.empty())
-        << "ReturnRoundRobin requires at least one element.";
-    state_->values = std::move(values);
-  }
-
-  template <typename... Args>
-  T operator()(Args&&...) const {
-     return state_->Next();
-  }
-
- private:
-  struct State {
-    T Next() {
-      T ret_val = values[i++];
-      if (i == values.size()) i = 0;
-      return ret_val;
-    }
-
-    std::vector<T> values;
-    size_t i = 0;
-  };
-  std::shared_ptr<State> state_ = std::make_shared<State>();
-};
-
-// Implements the polymorphic DoDefault() action.
-class DoDefaultAction {
- public:
-  // This template type conversion operator allows DoDefault() to be
-  // used in any function.
-  template <typename F>
-  operator Action<F>() const { return Action<F>(); }  // NOLINT
-};
-
-// Implements the Assign action to set a given pointer referent to a
-// particular value.
-template <typename T1, typename T2>
-class AssignAction {
- public:
-  AssignAction(T1* ptr, T2 value) : ptr_(ptr), value_(value) {}
-
-  template <typename Result, typename ArgumentTuple>
-  void Perform(const ArgumentTuple& /* args */) const {
-    *ptr_ = value_;
-  }
-
- private:
-  T1* const ptr_;
-  const T2 value_;
-};
-
-#if !GTEST_OS_WINDOWS_MOBILE
-
-// Implements the SetErrnoAndReturn action to simulate return from
-// various system calls and libc functions.
-template <typename T>
-class SetErrnoAndReturnAction {
- public:
-  SetErrnoAndReturnAction(int errno_value, T result)
-      : errno_(errno_value),
-        result_(result) {}
-  template <typename Result, typename ArgumentTuple>
-  Result Perform(const ArgumentTuple& /* args */) const {
-    errno = errno_;
-    return result_;
-  }
-
- private:
-  const int errno_;
-  const T result_;
-};
-
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Implements the SetArgumentPointee<N>(x) action for any function
-// whose N-th argument (0-based) is a pointer to x's type.
-template <size_t N, typename A, typename = void>
-struct SetArgumentPointeeAction {
-  A value;
-
-  template <typename... Args>
-  void operator()(const Args&... args) const {
-    *::std::get<N>(std::tie(args...)) = value;
-  }
-};
-
-// Implements the Invoke(object_ptr, &Class::Method) action.
-template <class Class, typename MethodPtr>
-struct InvokeMethodAction {
-  Class* const obj_ptr;
-  const MethodPtr method_ptr;
-
-  template <typename... Args>
-  auto operator()(Args&&... args) const
-      -> decltype((obj_ptr->*method_ptr)(std::forward<Args>(args)...)) {
-    return (obj_ptr->*method_ptr)(std::forward<Args>(args)...);
-  }
-};
-
-// Implements the InvokeWithoutArgs(f) action.  The template argument
-// FunctionImpl is the implementation type of f, which can be either a
-// function pointer or a functor.  InvokeWithoutArgs(f) can be used as an
-// Action<F> as long as f's type is compatible with F.
-template <typename FunctionImpl>
-struct InvokeWithoutArgsAction {
-  FunctionImpl function_impl;
-
-  // Allows InvokeWithoutArgs(f) to be used as any action whose type is
-  // compatible with f.
-  template <typename... Args>
-  auto operator()(const Args&...) -> decltype(function_impl()) {
-    return function_impl();
-  }
-};
-
-// Implements the InvokeWithoutArgs(object_ptr, &Class::Method) action.
-template <class Class, typename MethodPtr>
-struct InvokeMethodWithoutArgsAction {
-  Class* const obj_ptr;
-  const MethodPtr method_ptr;
-
-  using ReturnType =
-      decltype((std::declval<Class*>()->*std::declval<MethodPtr>())());
-
-  template <typename... Args>
-  ReturnType operator()(const Args&...) const {
-    return (obj_ptr->*method_ptr)();
-  }
-};
-
-// Implements the IgnoreResult(action) action.
-template <typename A>
-class IgnoreResultAction {
- public:
-  explicit IgnoreResultAction(const A& action) : action_(action) {}
-
-  template <typename F>
-  operator Action<F>() const {
-    // Assert statement belongs here because this is the best place to verify
-    // conditions on F. It produces the clearest error messages
-    // in most compilers.
-    // Impl really belongs in this scope as a local class but can't
-    // because MSVC produces duplicate symbols in different translation units
-    // in this case. Until MS fixes that bug we put Impl into the class scope
-    // and put the typedef both here (for use in assert statement) and
-    // in the Impl class. But both definitions must be the same.
-    typedef typename internal::Function<F>::Result Result;
-
-    // Asserts at compile time that F returns void.
-    static_assert(std::is_void<Result>::value, "Result type should be void.");
-
-    return Action<F>(new Impl<F>(action_));
-  }
-
- private:
-  template <typename F>
-  class Impl : public ActionInterface<F> {
-   public:
-    typedef typename internal::Function<F>::Result Result;
-    typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
-
-    explicit Impl(const A& action) : action_(action) {}
-
-    void Perform(const ArgumentTuple& args) override {
-      // Performs the action and ignores its result.
-      action_.Perform(args);
-    }
-
-   private:
-    // Type OriginalFunction is the same as F except that its return
-    // type is IgnoredValue.
-    typedef typename internal::Function<F>::MakeResultIgnoredValue
-        OriginalFunction;
-
-    const Action<OriginalFunction> action_;
-  };
-
-  const A action_;
-};
-
-template <typename InnerAction, size_t... I>
-struct WithArgsAction {
-  InnerAction action;
-
-  // The inner action could be anything convertible to Action<X>.
-  // We use the conversion operator to detect the signature of the inner Action.
-  template <typename R, typename... Args>
-  operator Action<R(Args...)>() const {  // NOLINT
-    using TupleType = std::tuple<Args...>;
-    Action<R(typename std::tuple_element<I, TupleType>::type...)>
-        converted(action);
-
-    return [converted](Args... args) -> R {
-      return converted.Perform(std::forward_as_tuple(
-        std::get<I>(std::forward_as_tuple(std::forward<Args>(args)...))...));
-    };
-  }
-};
-
-template <typename... Actions>
-struct DoAllAction {
- private:
-  template <typename T>
-  using NonFinalType =
-      typename std::conditional<std::is_scalar<T>::value, T, const T&>::type;
-
-  template <typename ActionT, size_t... I>
-  std::vector<ActionT> Convert(IndexSequence<I...>) const {
-    return {ActionT(std::get<I>(actions))...};
-  }
-
- public:
-  std::tuple<Actions...> actions;
-
-  template <typename R, typename... Args>
-  operator Action<R(Args...)>() const {  // NOLINT
-    struct Op {
-      std::vector<Action<void(NonFinalType<Args>...)>> converted;
-      Action<R(Args...)> last;
-      R operator()(Args... args) const {
-        auto tuple_args = std::forward_as_tuple(std::forward<Args>(args)...);
-        for (auto& a : converted) {
-          a.Perform(tuple_args);
-        }
-        return last.Perform(std::move(tuple_args));
-      }
-    };
-    return Op{Convert<Action<void(NonFinalType<Args>...)>>(
-                  MakeIndexSequence<sizeof...(Actions) - 1>()),
-              std::get<sizeof...(Actions) - 1>(actions)};
-  }
-};
-
-template <typename T, typename... Params>
-struct ReturnNewAction {
-  T* operator()() const {
-    return internal::Apply(
-        [](const Params&... unpacked_params) {
-          return new T(unpacked_params...);
-        },
-        params);
-  }
-  std::tuple<Params...> params;
-};
-
-template <size_t k>
-struct ReturnArgAction {
-  template <typename... Args>
-  auto operator()(const Args&... args) const ->
-      typename std::tuple_element<k, std::tuple<Args...>>::type {
-    return std::get<k>(std::tie(args...));
-  }
-};
-
-template <size_t k, typename Ptr>
-struct SaveArgAction {
-  Ptr pointer;
-
-  template <typename... Args>
-  void operator()(const Args&... args) const {
-    *pointer = std::get<k>(std::tie(args...));
-  }
-};
-
-template <size_t k, typename Ptr>
-struct SaveArgPointeeAction {
-  Ptr pointer;
-
-  template <typename... Args>
-  void operator()(const Args&... args) const {
-    *pointer = *std::get<k>(std::tie(args...));
-  }
-};
-
-template <size_t k, typename T>
-struct SetArgRefereeAction {
-  T value;
-
-  template <typename... Args>
-  void operator()(Args&&... args) const {
-    using argk_type =
-        typename ::std::tuple_element<k, std::tuple<Args...>>::type;
-    static_assert(std::is_lvalue_reference<argk_type>::value,
-                  "Argument must be a reference type.");
-    std::get<k>(std::tie(args...)) = value;
-  }
-};
-
-template <size_t k, typename I1, typename I2>
-struct SetArrayArgumentAction {
-  I1 first;
-  I2 last;
-
-  template <typename... Args>
-  void operator()(const Args&... args) const {
-    auto value = std::get<k>(std::tie(args...));
-    for (auto it = first; it != last; ++it, (void)++value) {
-      *value = *it;
-    }
-  }
-};
-
-template <size_t k>
-struct DeleteArgAction {
-  template <typename... Args>
-  void operator()(const Args&... args) const {
-    delete std::get<k>(std::tie(args...));
-  }
-};
-
-template <typename Ptr>
-struct ReturnPointeeAction {
-  Ptr pointer;
-  template <typename... Args>
-  auto operator()(const Args&...) const -> decltype(*pointer) {
-    return *pointer;
-  }
-};
-
-#if GTEST_HAS_EXCEPTIONS
-template <typename T>
-struct ThrowAction {
-  T exception;
-  // We use a conversion operator to adapt to any return type.
-  template <typename R, typename... Args>
-  operator Action<R(Args...)>() const {  // NOLINT
-    T copy = exception;
-    return [copy](Args...) -> R { throw copy; };
-  }
-};
-#endif  // GTEST_HAS_EXCEPTIONS
-
-}  // namespace internal
-
-// An Unused object can be implicitly constructed from ANY value.
-// This is handy when defining actions that ignore some or all of the
-// mock function arguments.  For example, given
-//
-//   MOCK_METHOD3(Foo, double(const string& label, double x, double y));
-//   MOCK_METHOD3(Bar, double(int index, double x, double y));
-//
-// instead of
-//
-//   double DistanceToOriginWithLabel(const string& label, double x, double y) {
-//     return sqrt(x*x + y*y);
-//   }
-//   double DistanceToOriginWithIndex(int index, double x, double y) {
-//     return sqrt(x*x + y*y);
-//   }
-//   ...
-//   EXPECT_CALL(mock, Foo("abc", _, _))
-//       .WillOnce(Invoke(DistanceToOriginWithLabel));
-//   EXPECT_CALL(mock, Bar(5, _, _))
-//       .WillOnce(Invoke(DistanceToOriginWithIndex));
-//
-// you could write
-//
-//   // We can declare any uninteresting argument as Unused.
-//   double DistanceToOrigin(Unused, double x, double y) {
-//     return sqrt(x*x + y*y);
-//   }
-//   ...
-//   EXPECT_CALL(mock, Foo("abc", _, _)).WillOnce(Invoke(DistanceToOrigin));
-//   EXPECT_CALL(mock, Bar(5, _, _)).WillOnce(Invoke(DistanceToOrigin));
-typedef internal::IgnoredValue Unused;
-
-// Creates an action that does actions a1, a2, ..., sequentially in
-// each invocation. All but the last action will have a readonly view of the
-// arguments.
-template <typename... Action>
-internal::DoAllAction<typename std::decay<Action>::type...> DoAll(
-    Action&&... action) {
-  return {std::forward_as_tuple(std::forward<Action>(action)...)};
-}
-
-// WithArg<k>(an_action) creates an action that passes the k-th
-// (0-based) argument of the mock function to an_action and performs
-// it.  It adapts an action accepting one argument to one that accepts
-// multiple arguments.  For convenience, we also provide
-// WithArgs<k>(an_action) (defined below) as a synonym.
-template <size_t k, typename InnerAction>
-internal::WithArgsAction<typename std::decay<InnerAction>::type, k>
-WithArg(InnerAction&& action) {
-  return {std::forward<InnerAction>(action)};
-}
-
-// WithArgs<N1, N2, ..., Nk>(an_action) creates an action that passes
-// the selected arguments of the mock function to an_action and
-// performs it.  It serves as an adaptor between actions with
-// different argument lists.
-template <size_t k, size_t... ks, typename InnerAction>
-internal::WithArgsAction<typename std::decay<InnerAction>::type, k, ks...>
-WithArgs(InnerAction&& action) {
-  return {std::forward<InnerAction>(action)};
-}
-
-// WithoutArgs(inner_action) can be used in a mock function with a
-// non-empty argument list to perform inner_action, which takes no
-// argument.  In other words, it adapts an action accepting no
-// argument to one that accepts (and ignores) arguments.
-template <typename InnerAction>
-internal::WithArgsAction<typename std::decay<InnerAction>::type>
-WithoutArgs(InnerAction&& action) {
-  return {std::forward<InnerAction>(action)};
-}
-
-// Creates an action that returns 'value'.  'value' is passed by value
-// instead of const reference - otherwise Return("string literal")
-// will trigger a compiler error about using array as initializer.
-template <typename R>
-internal::ReturnAction<R> Return(R value) {
-  return internal::ReturnAction<R>(std::move(value));
-}
-
-// Creates an action that returns NULL.
-inline PolymorphicAction<internal::ReturnNullAction> ReturnNull() {
-  return MakePolymorphicAction(internal::ReturnNullAction());
-}
-
-// Creates an action that returns from a void function.
-inline PolymorphicAction<internal::ReturnVoidAction> Return() {
-  return MakePolymorphicAction(internal::ReturnVoidAction());
-}
-
-// Creates an action that returns the reference to a variable.
-template <typename R>
-inline internal::ReturnRefAction<R> ReturnRef(R& x) {  // NOLINT
-  return internal::ReturnRefAction<R>(x);
-}
-
-// Prevent using ReturnRef on reference to temporary.
-template <typename R, R* = nullptr>
-internal::ReturnRefAction<R> ReturnRef(R&&) = delete;
-
-// Creates an action that returns the reference to a copy of the
-// argument.  The copy is created when the action is constructed and
-// lives as long as the action.
-template <typename R>
-inline internal::ReturnRefOfCopyAction<R> ReturnRefOfCopy(const R& x) {
-  return internal::ReturnRefOfCopyAction<R>(x);
-}
-
-// Modifies the parent action (a Return() action) to perform a move of the
-// argument instead of a copy.
-// Return(ByMove()) actions can only be executed once and will assert this
-// invariant.
-template <typename R>
-internal::ByMoveWrapper<R> ByMove(R x) {
-  return internal::ByMoveWrapper<R>(std::move(x));
-}
-
-// Creates an action that returns an element of `vals`. Calling this action will
-// repeatedly return the next value from `vals` until it reaches the end and
-// will restart from the beginning.
-template <typename T>
-internal::ReturnRoundRobinAction<T> ReturnRoundRobin(std::vector<T> vals) {
-  return internal::ReturnRoundRobinAction<T>(std::move(vals));
-}
-
-// Creates an action that returns an element of `vals`. Calling this action will
-// repeatedly return the next value from `vals` until it reaches the end and
-// will restart from the beginning.
-template <typename T>
-internal::ReturnRoundRobinAction<T> ReturnRoundRobin(
-    std::initializer_list<T> vals) {
-  return internal::ReturnRoundRobinAction<T>(std::vector<T>(vals));
-}
-
-// Creates an action that does the default action for the give mock function.
-inline internal::DoDefaultAction DoDefault() {
-  return internal::DoDefaultAction();
-}
-
-// Creates an action that sets the variable pointed by the N-th
-// (0-based) function argument to 'value'.
-template <size_t N, typename T>
-internal::SetArgumentPointeeAction<N, T> SetArgPointee(T value) {
-  return {std::move(value)};
-}
-
-// The following version is DEPRECATED.
-template <size_t N, typename T>
-internal::SetArgumentPointeeAction<N, T> SetArgumentPointee(T value) {
-  return {std::move(value)};
-}
-
-// Creates an action that sets a pointer referent to a given value.
-template <typename T1, typename T2>
-PolymorphicAction<internal::AssignAction<T1, T2> > Assign(T1* ptr, T2 val) {
-  return MakePolymorphicAction(internal::AssignAction<T1, T2>(ptr, val));
-}
-
-#if !GTEST_OS_WINDOWS_MOBILE
-
-// Creates an action that sets errno and returns the appropriate error.
-template <typename T>
-PolymorphicAction<internal::SetErrnoAndReturnAction<T> >
-SetErrnoAndReturn(int errval, T result) {
-  return MakePolymorphicAction(
-      internal::SetErrnoAndReturnAction<T>(errval, result));
-}
-
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Various overloads for Invoke().
-
-// Legacy function.
-// Actions can now be implicitly constructed from callables. No need to create
-// wrapper objects.
-// This function exists for backwards compatibility.
-template <typename FunctionImpl>
-typename std::decay<FunctionImpl>::type Invoke(FunctionImpl&& function_impl) {
-  return std::forward<FunctionImpl>(function_impl);
-}
-
-// Creates an action that invokes the given method on the given object
-// with the mock function's arguments.
-template <class Class, typename MethodPtr>
-internal::InvokeMethodAction<Class, MethodPtr> Invoke(Class* obj_ptr,
-                                                      MethodPtr method_ptr) {
-  return {obj_ptr, method_ptr};
-}
-
-// Creates an action that invokes 'function_impl' with no argument.
-template <typename FunctionImpl>
-internal::InvokeWithoutArgsAction<typename std::decay<FunctionImpl>::type>
-InvokeWithoutArgs(FunctionImpl function_impl) {
-  return {std::move(function_impl)};
-}
-
-// Creates an action that invokes the given method on the given object
-// with no argument.
-template <class Class, typename MethodPtr>
-internal::InvokeMethodWithoutArgsAction<Class, MethodPtr> InvokeWithoutArgs(
-    Class* obj_ptr, MethodPtr method_ptr) {
-  return {obj_ptr, method_ptr};
-}
-
-// Creates an action that performs an_action and throws away its
-// result.  In other words, it changes the return type of an_action to
-// void.  an_action MUST NOT return void, or the code won't compile.
-template <typename A>
-inline internal::IgnoreResultAction<A> IgnoreResult(const A& an_action) {
-  return internal::IgnoreResultAction<A>(an_action);
-}
-
-// Creates a reference wrapper for the given L-value.  If necessary,
-// you can explicitly specify the type of the reference.  For example,
-// suppose 'derived' is an object of type Derived, ByRef(derived)
-// would wrap a Derived&.  If you want to wrap a const Base& instead,
-// where Base is a base class of Derived, just write:
-//
-//   ByRef<const Base>(derived)
-//
-// N.B. ByRef is redundant with std::ref, std::cref and std::reference_wrapper.
-// However, it may still be used for consistency with ByMove().
-template <typename T>
-inline ::std::reference_wrapper<T> ByRef(T& l_value) {  // NOLINT
-  return ::std::reference_wrapper<T>(l_value);
-}
-
-// The ReturnNew<T>(a1, a2, ..., a_k) action returns a pointer to a new
-// instance of type T, constructed on the heap with constructor arguments
-// a1, a2, ..., and a_k. The caller assumes ownership of the returned value.
-template <typename T, typename... Params>
-internal::ReturnNewAction<T, typename std::decay<Params>::type...> ReturnNew(
-    Params&&... params) {
-  return {std::forward_as_tuple(std::forward<Params>(params)...)};
-}
-
-// Action ReturnArg<k>() returns the k-th argument of the mock function.
-template <size_t k>
-internal::ReturnArgAction<k> ReturnArg() {
-  return {};
-}
-
-// Action SaveArg<k>(pointer) saves the k-th (0-based) argument of the
-// mock function to *pointer.
-template <size_t k, typename Ptr>
-internal::SaveArgAction<k, Ptr> SaveArg(Ptr pointer) {
-  return {pointer};
-}
-
-// Action SaveArgPointee<k>(pointer) saves the value pointed to
-// by the k-th (0-based) argument of the mock function to *pointer.
-template <size_t k, typename Ptr>
-internal::SaveArgPointeeAction<k, Ptr> SaveArgPointee(Ptr pointer) {
-  return {pointer};
-}
-
-// Action SetArgReferee<k>(value) assigns 'value' to the variable
-// referenced by the k-th (0-based) argument of the mock function.
-template <size_t k, typename T>
-internal::SetArgRefereeAction<k, typename std::decay<T>::type> SetArgReferee(
-    T&& value) {
-  return {std::forward<T>(value)};
-}
-
-// Action SetArrayArgument<k>(first, last) copies the elements in
-// source range [first, last) to the array pointed to by the k-th
-// (0-based) argument, which can be either a pointer or an
-// iterator. The action does not take ownership of the elements in the
-// source range.
-template <size_t k, typename I1, typename I2>
-internal::SetArrayArgumentAction<k, I1, I2> SetArrayArgument(I1 first,
-                                                             I2 last) {
-  return {first, last};
-}
-
-// Action DeleteArg<k>() deletes the k-th (0-based) argument of the mock
-// function.
-template <size_t k>
-internal::DeleteArgAction<k> DeleteArg() {
-  return {};
-}
-
-// This action returns the value pointed to by 'pointer'.
-template <typename Ptr>
-internal::ReturnPointeeAction<Ptr> ReturnPointee(Ptr pointer) {
-  return {pointer};
-}
-
-// Action Throw(exception) can be used in a mock function of any type
-// to throw the given exception.  Any copyable value can be thrown.
-#if GTEST_HAS_EXCEPTIONS
-template <typename T>
-internal::ThrowAction<typename std::decay<T>::type> Throw(T&& exception) {
-  return {std::forward<T>(exception)};
-}
-#endif  // GTEST_HAS_EXCEPTIONS
-
-namespace internal {
-
-// A macro from the ACTION* family (defined later in gmock-generated-actions.h)
-// defines an action that can be used in a mock function.  Typically,
-// these actions only care about a subset of the arguments of the mock
-// function.  For example, if such an action only uses the second
-// argument, it can be used in any mock function that takes >= 2
-// arguments where the type of the second argument is compatible.
-//
-// Therefore, the action implementation must be prepared to take more
-// arguments than it needs.  The ExcessiveArg type is used to
-// represent those excessive arguments.  In order to keep the compiler
-// error messages tractable, we define it in the testing namespace
-// instead of testing::internal.  However, this is an INTERNAL TYPE
-// and subject to change without notice, so a user MUST NOT USE THIS
-// TYPE DIRECTLY.
-struct ExcessiveArg {};
-
-// Builds an implementation of an Action<> for some particular signature, using
-// a class defined by an ACTION* macro.
-template <typename F, typename Impl> struct ActionImpl;
-
-template <typename Impl>
-struct ImplBase {
-  struct Holder {
-    // Allows each copy of the Action<> to get to the Impl.
-    explicit operator const Impl&() const { return *ptr; }
-    std::shared_ptr<Impl> ptr;
-  };
-  using type = typename std::conditional<std::is_constructible<Impl>::value,
-                                         Impl, Holder>::type;
-};
-
-template <typename R, typename... Args, typename Impl>
-struct ActionImpl<R(Args...), Impl> : ImplBase<Impl>::type {
-  using Base = typename ImplBase<Impl>::type;
-  using function_type = R(Args...);
-  using args_type = std::tuple<Args...>;
-
-  ActionImpl() = default;  // Only defined if appropriate for Base.
-  explicit ActionImpl(std::shared_ptr<Impl> impl) : Base{std::move(impl)} { }
-
-  R operator()(Args&&... arg) const {
-    static constexpr size_t kMaxArgs =
-        sizeof...(Args) <= 10 ? sizeof...(Args) : 10;
-    return Apply(MakeIndexSequence<kMaxArgs>{},
-                 MakeIndexSequence<10 - kMaxArgs>{},
-                 args_type{std::forward<Args>(arg)...});
-  }
-
-  template <std::size_t... arg_id, std::size_t... excess_id>
-  R Apply(IndexSequence<arg_id...>, IndexSequence<excess_id...>,
-          const args_type& args) const {
-    // Impl need not be specific to the signature of action being implemented;
-    // only the implementing function body needs to have all of the specific
-    // types instantiated.  Up to 10 of the args that are provided by the
-    // args_type get passed, followed by a dummy of unspecified type for the
-    // remainder up to 10 explicit args.
-    static constexpr ExcessiveArg kExcessArg{};
-    return static_cast<const Impl&>(*this).template gmock_PerformImpl<
-        /*function_type=*/function_type, /*return_type=*/R,
-        /*args_type=*/args_type,
-        /*argN_type=*/typename std::tuple_element<arg_id, args_type>::type...>(
-        /*args=*/args, std::get<arg_id>(args)...,
-        ((void)excess_id, kExcessArg)...);
-  }
-};
-
-// Stores a default-constructed Impl as part of the Action<>'s
-// std::function<>. The Impl should be trivial to copy.
-template <typename F, typename Impl>
-::testing::Action<F> MakeAction() {
-  return ::testing::Action<F>(ActionImpl<F, Impl>());
-}
-
-// Stores just the one given instance of Impl.
-template <typename F, typename Impl>
-::testing::Action<F> MakeAction(std::shared_ptr<Impl> impl) {
-  return ::testing::Action<F>(ActionImpl<F, Impl>(std::move(impl)));
-}
-
-#define GMOCK_INTERNAL_ARG_UNUSED(i, data, el) \
-  , const arg##i##_type& arg##i GTEST_ATTRIBUTE_UNUSED_
-#define GMOCK_ACTION_ARG_TYPES_AND_NAMES_UNUSED_           \
-  const args_type& args GTEST_ATTRIBUTE_UNUSED_ GMOCK_PP_REPEAT( \
-      GMOCK_INTERNAL_ARG_UNUSED, , 10)
-
-#define GMOCK_INTERNAL_ARG(i, data, el) , const arg##i##_type& arg##i
-#define GMOCK_ACTION_ARG_TYPES_AND_NAMES_ \
-  const args_type& args GMOCK_PP_REPEAT(GMOCK_INTERNAL_ARG, , 10)
-
-#define GMOCK_INTERNAL_TEMPLATE_ARG(i, data, el) , typename arg##i##_type
-#define GMOCK_ACTION_TEMPLATE_ARGS_NAMES_ \
-  GMOCK_PP_TAIL(GMOCK_PP_REPEAT(GMOCK_INTERNAL_TEMPLATE_ARG, , 10))
-
-#define GMOCK_INTERNAL_TYPENAME_PARAM(i, data, param) , typename param##_type
-#define GMOCK_ACTION_TYPENAME_PARAMS_(params) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_TYPENAME_PARAM, , params))
-
-#define GMOCK_INTERNAL_TYPE_PARAM(i, data, param) , param##_type
-#define GMOCK_ACTION_TYPE_PARAMS_(params) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_TYPE_PARAM, , params))
-
-#define GMOCK_INTERNAL_TYPE_GVALUE_PARAM(i, data, param) \
-  , param##_type gmock_p##i
-#define GMOCK_ACTION_TYPE_GVALUE_PARAMS_(params) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_TYPE_GVALUE_PARAM, , params))
-
-#define GMOCK_INTERNAL_GVALUE_PARAM(i, data, param) \
-  , std::forward<param##_type>(gmock_p##i)
-#define GMOCK_ACTION_GVALUE_PARAMS_(params) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_GVALUE_PARAM, , params))
-
-#define GMOCK_INTERNAL_INIT_PARAM(i, data, param) \
-  , param(::std::forward<param##_type>(gmock_p##i))
-#define GMOCK_ACTION_INIT_PARAMS_(params) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_INIT_PARAM, , params))
-
-#define GMOCK_INTERNAL_FIELD_PARAM(i, data, param) param##_type param;
-#define GMOCK_ACTION_FIELD_PARAMS_(params) \
-  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_FIELD_PARAM, , params)
-
-#define GMOCK_INTERNAL_ACTION(name, full_name, params)                        \
-  template <GMOCK_ACTION_TYPENAME_PARAMS_(params)>                            \
-  class full_name {                                                           \
-   public:                                                                    \
-    explicit full_name(GMOCK_ACTION_TYPE_GVALUE_PARAMS_(params))              \
-        : impl_(std::make_shared<gmock_Impl>(                                 \
-                GMOCK_ACTION_GVALUE_PARAMS_(params))) { }                     \
-    full_name(const full_name&) = default;                                    \
-    full_name(full_name&&) noexcept = default;                                \
-    template <typename F>                                                     \
-    operator ::testing::Action<F>() const {                                   \
-      return ::testing::internal::MakeAction<F>(impl_);                       \
-    }                                                                         \
-   private:                                                                   \
-    class gmock_Impl {                                                        \
-     public:                                                                  \
-      explicit gmock_Impl(GMOCK_ACTION_TYPE_GVALUE_PARAMS_(params))           \
-          : GMOCK_ACTION_INIT_PARAMS_(params) {}                              \
-      template <typename function_type, typename return_type,                 \
-                typename args_type, GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>        \
-      return_type gmock_PerformImpl(GMOCK_ACTION_ARG_TYPES_AND_NAMES_) const; \
-      GMOCK_ACTION_FIELD_PARAMS_(params)                                      \
-    };                                                                        \
-    std::shared_ptr<const gmock_Impl> impl_;                                  \
-  };                                                                          \
-  template <GMOCK_ACTION_TYPENAME_PARAMS_(params)>                            \
-  inline full_name<GMOCK_ACTION_TYPE_PARAMS_(params)> name(                   \
-      GMOCK_ACTION_TYPE_GVALUE_PARAMS_(params)) {                             \
-    return full_name<GMOCK_ACTION_TYPE_PARAMS_(params)>(                      \
-        GMOCK_ACTION_GVALUE_PARAMS_(params));                                 \
-  }                                                                           \
-  template <GMOCK_ACTION_TYPENAME_PARAMS_(params)>                            \
-  template <typename function_type, typename return_type, typename args_type, \
-            GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>                                \
-  return_type full_name<GMOCK_ACTION_TYPE_PARAMS_(params)>::gmock_Impl::      \
-  gmock_PerformImpl(GMOCK_ACTION_ARG_TYPES_AND_NAMES_UNUSED_) const
-
-}  // namespace internal
-
-// Similar to GMOCK_INTERNAL_ACTION, but no bound parameters are stored.
-#define ACTION(name)                                                          \
-  class name##Action {                                                        \
-   public:                                                                    \
-   explicit name##Action() noexcept {}                                        \
-   name##Action(const name##Action&) noexcept {}                              \
-    template <typename F>                                                     \
-    operator ::testing::Action<F>() const {                                   \
-      return ::testing::internal::MakeAction<F, gmock_Impl>();                \
-    }                                                                         \
-   private:                                                                   \
-    class gmock_Impl {                                                        \
-     public:                                                                  \
-      template <typename function_type, typename return_type,                 \
-                typename args_type, GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>        \
-      return_type gmock_PerformImpl(GMOCK_ACTION_ARG_TYPES_AND_NAMES_) const; \
-    };                                                                        \
-  };                                                                          \
-  inline name##Action name() GTEST_MUST_USE_RESULT_;                          \
-  inline name##Action name() { return name##Action(); }                       \
-  template <typename function_type, typename return_type, typename args_type, \
-            GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>                                \
-  return_type name##Action::gmock_Impl::gmock_PerformImpl(                    \
-      GMOCK_ACTION_ARG_TYPES_AND_NAMES_UNUSED_) const
-
-#define ACTION_P(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP, (__VA_ARGS__))
-
-#define ACTION_P2(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP2, (__VA_ARGS__))
-
-#define ACTION_P3(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP3, (__VA_ARGS__))
-
-#define ACTION_P4(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP4, (__VA_ARGS__))
-
-#define ACTION_P5(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP5, (__VA_ARGS__))
-
-#define ACTION_P6(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP6, (__VA_ARGS__))
-
-#define ACTION_P7(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP7, (__VA_ARGS__))
-
-#define ACTION_P8(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP8, (__VA_ARGS__))
-
-#define ACTION_P9(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP9, (__VA_ARGS__))
-
-#define ACTION_P10(name, ...) \
-  GMOCK_INTERNAL_ACTION(name, name##ActionP10, (__VA_ARGS__))
-
-}  // namespace testing
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements some commonly used cardinalities.  More
-// cardinalities can be defined by the user implementing the
-// CardinalityInterface interface if necessary.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
-
-#include <limits.h>
-#include <memory>
-#include <ostream>  // NOLINT
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// To implement a cardinality Foo, define:
-//   1. a class FooCardinality that implements the
-//      CardinalityInterface interface, and
-//   2. a factory function that creates a Cardinality object from a
-//      const FooCardinality*.
-//
-// The two-level delegation design follows that of Matcher, providing
-// consistency for extension developers.  It also eases ownership
-// management as Cardinality objects can now be copied like plain values.
-
-// The implementation of a cardinality.
-class CardinalityInterface {
- public:
-  virtual ~CardinalityInterface() {}
-
-  // Conservative estimate on the lower/upper bound of the number of
-  // calls allowed.
-  virtual int ConservativeLowerBound() const { return 0; }
-  virtual int ConservativeUpperBound() const { return INT_MAX; }
-
-  // Returns true if and only if call_count calls will satisfy this
-  // cardinality.
-  virtual bool IsSatisfiedByCallCount(int call_count) const = 0;
-
-  // Returns true if and only if call_count calls will saturate this
-  // cardinality.
-  virtual bool IsSaturatedByCallCount(int call_count) const = 0;
-
-  // Describes self to an ostream.
-  virtual void DescribeTo(::std::ostream* os) const = 0;
-};
-
-// A Cardinality is a copyable and IMMUTABLE (except by assignment)
-// object that specifies how many times a mock function is expected to
-// be called.  The implementation of Cardinality is just a std::shared_ptr
-// to const CardinalityInterface. Don't inherit from Cardinality!
-class GTEST_API_ Cardinality {
- public:
-  // Constructs a null cardinality.  Needed for storing Cardinality
-  // objects in STL containers.
-  Cardinality() {}
-
-  // Constructs a Cardinality from its implementation.
-  explicit Cardinality(const CardinalityInterface* impl) : impl_(impl) {}
-
-  // Conservative estimate on the lower/upper bound of the number of
-  // calls allowed.
-  int ConservativeLowerBound() const { return impl_->ConservativeLowerBound(); }
-  int ConservativeUpperBound() const { return impl_->ConservativeUpperBound(); }
-
-  // Returns true if and only if call_count calls will satisfy this
-  // cardinality.
-  bool IsSatisfiedByCallCount(int call_count) const {
-    return impl_->IsSatisfiedByCallCount(call_count);
-  }
-
-  // Returns true if and only if call_count calls will saturate this
-  // cardinality.
-  bool IsSaturatedByCallCount(int call_count) const {
-    return impl_->IsSaturatedByCallCount(call_count);
-  }
-
-  // Returns true if and only if call_count calls will over-saturate this
-  // cardinality, i.e. exceed the maximum number of allowed calls.
-  bool IsOverSaturatedByCallCount(int call_count) const {
-    return impl_->IsSaturatedByCallCount(call_count) &&
-        !impl_->IsSatisfiedByCallCount(call_count);
-  }
-
-  // Describes self to an ostream
-  void DescribeTo(::std::ostream* os) const { impl_->DescribeTo(os); }
-
-  // Describes the given actual call count to an ostream.
-  static void DescribeActualCallCountTo(int actual_call_count,
-                                        ::std::ostream* os);
-
- private:
-  std::shared_ptr<const CardinalityInterface> impl_;
-};
-
-// Creates a cardinality that allows at least n calls.
-GTEST_API_ Cardinality AtLeast(int n);
-
-// Creates a cardinality that allows at most n calls.
-GTEST_API_ Cardinality AtMost(int n);
-
-// Creates a cardinality that allows any number of calls.
-GTEST_API_ Cardinality AnyNumber();
-
-// Creates a cardinality that allows between min and max calls.
-GTEST_API_ Cardinality Between(int min, int max);
-
-// Creates a cardinality that allows exactly n calls.
-GTEST_API_ Cardinality Exactly(int n);
-
-// Creates a cardinality from its implementation.
-inline Cardinality MakeCardinality(const CardinalityInterface* c) {
-  return Cardinality(c);
-}
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements MOCK_METHOD.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_FUNCTION_MOCKER_H_  // NOLINT
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_FUNCTION_MOCKER_H_  // NOLINT
-
-#include <type_traits>  // IWYU pragma: keep
-#include <utility>      // IWYU pragma: keep
-
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements the ON_CALL() and EXPECT_CALL() macros.
-//
-// A user can use the ON_CALL() macro to specify the default action of
-// a mock method.  The syntax is:
-//
-//   ON_CALL(mock_object, Method(argument-matchers))
-//       .With(multi-argument-matcher)
-//       .WillByDefault(action);
-//
-//  where the .With() clause is optional.
-//
-// A user can use the EXPECT_CALL() macro to specify an expectation on
-// a mock method.  The syntax is:
-//
-//   EXPECT_CALL(mock_object, Method(argument-matchers))
-//       .With(multi-argument-matchers)
-//       .Times(cardinality)
-//       .InSequence(sequences)
-//       .After(expectations)
-//       .WillOnce(action)
-//       .WillRepeatedly(action)
-//       .RetiresOnSaturation();
-//
-// where all clauses are optional, and .InSequence()/.After()/
-// .WillOnce() can appear any number of times.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_
-
-#include <functional>
-#include <map>
-#include <memory>
-#include <set>
-#include <sstream>
-#include <string>
-#include <type_traits>
-#include <utility>
-#include <vector>
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// The MATCHER* family of macros can be used in a namespace scope to
-// define custom matchers easily.
-//
-// Basic Usage
-// ===========
-//
-// The syntax
-//
-//   MATCHER(name, description_string) { statements; }
-//
-// defines a matcher with the given name that executes the statements,
-// which must return a bool to indicate if the match succeeds.  Inside
-// the statements, you can refer to the value being matched by 'arg',
-// and refer to its type by 'arg_type'.
-//
-// The description string documents what the matcher does, and is used
-// to generate the failure message when the match fails.  Since a
-// MATCHER() is usually defined in a header file shared by multiple
-// C++ source files, we require the description to be a C-string
-// literal to avoid possible side effects.  It can be empty, in which
-// case we'll use the sequence of words in the matcher name as the
-// description.
-//
-// For example:
-//
-//   MATCHER(IsEven, "") { return (arg % 2) == 0; }
-//
-// allows you to write
-//
-//   // Expects mock_foo.Bar(n) to be called where n is even.
-//   EXPECT_CALL(mock_foo, Bar(IsEven()));
-//
-// or,
-//
-//   // Verifies that the value of some_expression is even.
-//   EXPECT_THAT(some_expression, IsEven());
-//
-// If the above assertion fails, it will print something like:
-//
-//   Value of: some_expression
-//   Expected: is even
-//     Actual: 7
-//
-// where the description "is even" is automatically calculated from the
-// matcher name IsEven.
-//
-// Argument Type
-// =============
-//
-// Note that the type of the value being matched (arg_type) is
-// determined by the context in which you use the matcher and is
-// supplied to you by the compiler, so you don't need to worry about
-// declaring it (nor can you).  This allows the matcher to be
-// polymorphic.  For example, IsEven() can be used to match any type
-// where the value of "(arg % 2) == 0" can be implicitly converted to
-// a bool.  In the "Bar(IsEven())" example above, if method Bar()
-// takes an int, 'arg_type' will be int; if it takes an unsigned long,
-// 'arg_type' will be unsigned long; and so on.
-//
-// Parameterizing Matchers
-// =======================
-//
-// Sometimes you'll want to parameterize the matcher.  For that you
-// can use another macro:
-//
-//   MATCHER_P(name, param_name, description_string) { statements; }
-//
-// For example:
-//
-//   MATCHER_P(HasAbsoluteValue, value, "") { return abs(arg) == value; }
-//
-// will allow you to write:
-//
-//   EXPECT_THAT(Blah("a"), HasAbsoluteValue(n));
-//
-// which may lead to this message (assuming n is 10):
-//
-//   Value of: Blah("a")
-//   Expected: has absolute value 10
-//     Actual: -9
-//
-// Note that both the matcher description and its parameter are
-// printed, making the message human-friendly.
-//
-// In the matcher definition body, you can write 'foo_type' to
-// reference the type of a parameter named 'foo'.  For example, in the
-// body of MATCHER_P(HasAbsoluteValue, value) above, you can write
-// 'value_type' to refer to the type of 'value'.
-//
-// We also provide MATCHER_P2, MATCHER_P3, ..., up to MATCHER_P$n to
-// support multi-parameter matchers.
-//
-// Describing Parameterized Matchers
-// =================================
-//
-// The last argument to MATCHER*() is a string-typed expression.  The
-// expression can reference all of the matcher's parameters and a
-// special bool-typed variable named 'negation'.  When 'negation' is
-// false, the expression should evaluate to the matcher's description;
-// otherwise it should evaluate to the description of the negation of
-// the matcher.  For example,
-//
-//   using testing::PrintToString;
-//
-//   MATCHER_P2(InClosedRange, low, hi,
-//       std::string(negation ? "is not" : "is") + " in range [" +
-//       PrintToString(low) + ", " + PrintToString(hi) + "]") {
-//     return low <= arg && arg <= hi;
-//   }
-//   ...
-//   EXPECT_THAT(3, InClosedRange(4, 6));
-//   EXPECT_THAT(3, Not(InClosedRange(2, 4)));
-//
-// would generate two failures that contain the text:
-//
-//   Expected: is in range [4, 6]
-//   ...
-//   Expected: is not in range [2, 4]
-//
-// If you specify "" as the description, the failure message will
-// contain the sequence of words in the matcher name followed by the
-// parameter values printed as a tuple.  For example,
-//
-//   MATCHER_P2(InClosedRange, low, hi, "") { ... }
-//   ...
-//   EXPECT_THAT(3, InClosedRange(4, 6));
-//   EXPECT_THAT(3, Not(InClosedRange(2, 4)));
-//
-// would generate two failures that contain the text:
-//
-//   Expected: in closed range (4, 6)
-//   ...
-//   Expected: not (in closed range (2, 4))
-//
-// Types of Matcher Parameters
-// ===========================
-//
-// For the purpose of typing, you can view
-//
-//   MATCHER_Pk(Foo, p1, ..., pk, description_string) { ... }
-//
-// as shorthand for
-//
-//   template <typename p1_type, ..., typename pk_type>
-//   FooMatcherPk<p1_type, ..., pk_type>
-//   Foo(p1_type p1, ..., pk_type pk) { ... }
-//
-// When you write Foo(v1, ..., vk), the compiler infers the types of
-// the parameters v1, ..., and vk for you.  If you are not happy with
-// the result of the type inference, you can specify the types by
-// explicitly instantiating the template, as in Foo<long, bool>(5,
-// false).  As said earlier, you don't get to (or need to) specify
-// 'arg_type' as that's determined by the context in which the matcher
-// is used.  You can assign the result of expression Foo(p1, ..., pk)
-// to a variable of type FooMatcherPk<p1_type, ..., pk_type>.  This
-// can be useful when composing matchers.
-//
-// While you can instantiate a matcher template with reference types,
-// passing the parameters by pointer usually makes your code more
-// readable.  If, however, you still want to pass a parameter by
-// reference, be aware that in the failure message generated by the
-// matcher you will see the value of the referenced object but not its
-// address.
-//
-// Explaining Match Results
-// ========================
-//
-// Sometimes the matcher description alone isn't enough to explain why
-// the match has failed or succeeded.  For example, when expecting a
-// long string, it can be very helpful to also print the diff between
-// the expected string and the actual one.  To achieve that, you can
-// optionally stream additional information to a special variable
-// named result_listener, whose type is a pointer to class
-// MatchResultListener:
-//
-//   MATCHER_P(EqualsLongString, str, "") {
-//     if (arg == str) return true;
-//
-//     *result_listener << "the difference: "
-///                     << DiffStrings(str, arg);
-//     return false;
-//   }
-//
-// Overloading Matchers
-// ====================
-//
-// You can overload matchers with different numbers of parameters:
-//
-//   MATCHER_P(Blah, a, description_string1) { ... }
-//   MATCHER_P2(Blah, a, b, description_string2) { ... }
-//
-// Caveats
-// =======
-//
-// When defining a new matcher, you should also consider implementing
-// MatcherInterface or using MakePolymorphicMatcher().  These
-// approaches require more work than the MATCHER* macros, but also
-// give you more control on the types of the value being matched and
-// the matcher parameters, which may leads to better compiler error
-// messages when the matcher is used wrong.  They also allow
-// overloading matchers based on parameter types (as opposed to just
-// based on the number of parameters).
-//
-// MATCHER*() can only be used in a namespace scope as templates cannot be
-// declared inside of a local class.
-//
-// More Information
-// ================
-//
-// To learn more about using these macros, please search for 'MATCHER'
-// on
-// https://github.com/google/googletest/blob/master/docs/gmock_cook_book.md
-//
-// This file also implements some commonly used argument matchers.  More
-// matchers can be defined by the user implementing the
-// MatcherInterface<T> interface if necessary.
-//
-// See googletest/include/gtest/gtest-matchers.h for the definition of class
-// Matcher, class MatcherInterface, and others.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_
-
-#include <algorithm>
-#include <cmath>
-#include <initializer_list>
-#include <iterator>
-#include <limits>
-#include <memory>
-#include <ostream>  // NOLINT
-#include <sstream>
-#include <string>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-
-// MSVC warning C5046 is new as of VS2017 version 15.8.
-#if defined(_MSC_VER) && _MSC_VER >= 1915
-#define GMOCK_MAYBE_5046_ 5046
-#else
-#define GMOCK_MAYBE_5046_
-#endif
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(
-    4251 GMOCK_MAYBE_5046_ /* class A needs to have dll-interface to be used by
-                              clients of class B */
-    /* Symbol involving type with internal linkage not defined */)
-
-namespace testing {
-
-// To implement a matcher Foo for type T, define:
-//   1. a class FooMatcherImpl that implements the
-//      MatcherInterface<T> interface, and
-//   2. a factory function that creates a Matcher<T> object from a
-//      FooMatcherImpl*.
-//
-// The two-level delegation design makes it possible to allow a user
-// to write "v" instead of "Eq(v)" where a Matcher is expected, which
-// is impossible if we pass matchers by pointers.  It also eases
-// ownership management as Matcher objects can now be copied like
-// plain values.
-
-// A match result listener that stores the explanation in a string.
-class StringMatchResultListener : public MatchResultListener {
- public:
-  StringMatchResultListener() : MatchResultListener(&ss_) {}
-
-  // Returns the explanation accumulated so far.
-  std::string str() const { return ss_.str(); }
-
-  // Clears the explanation accumulated so far.
-  void Clear() { ss_.str(""); }
-
- private:
-  ::std::stringstream ss_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(StringMatchResultListener);
-};
-
-// Anything inside the 'internal' namespace IS INTERNAL IMPLEMENTATION
-// and MUST NOT BE USED IN USER CODE!!!
-namespace internal {
-
-// The MatcherCastImpl class template is a helper for implementing
-// MatcherCast().  We need this helper in order to partially
-// specialize the implementation of MatcherCast() (C++ allows
-// class/struct templates to be partially specialized, but not
-// function templates.).
-
-// This general version is used when MatcherCast()'s argument is a
-// polymorphic matcher (i.e. something that can be converted to a
-// Matcher but is not one yet; for example, Eq(value)) or a value (for
-// example, "hello").
-template <typename T, typename M>
-class MatcherCastImpl {
- public:
-  static Matcher<T> Cast(const M& polymorphic_matcher_or_value) {
-    // M can be a polymorphic matcher, in which case we want to use
-    // its conversion operator to create Matcher<T>.  Or it can be a value
-    // that should be passed to the Matcher<T>'s constructor.
-    //
-    // We can't call Matcher<T>(polymorphic_matcher_or_value) when M is a
-    // polymorphic matcher because it'll be ambiguous if T has an implicit
-    // constructor from M (this usually happens when T has an implicit
-    // constructor from any type).
-    //
-    // It won't work to unconditionally implicit_cast
-    // polymorphic_matcher_or_value to Matcher<T> because it won't trigger
-    // a user-defined conversion from M to T if one exists (assuming M is
-    // a value).
-    return CastImpl(polymorphic_matcher_or_value,
-                    std::is_convertible<M, Matcher<T>>{},
-                    std::is_convertible<M, T>{});
-  }
-
- private:
-  template <bool Ignore>
-  static Matcher<T> CastImpl(const M& polymorphic_matcher_or_value,
-                             std::true_type /* convertible_to_matcher */,
-                             std::integral_constant<bool, Ignore>) {
-    // M is implicitly convertible to Matcher<T>, which means that either
-    // M is a polymorphic matcher or Matcher<T> has an implicit constructor
-    // from M.  In both cases using the implicit conversion will produce a
-    // matcher.
-    //
-    // Even if T has an implicit constructor from M, it won't be called because
-    // creating Matcher<T> would require a chain of two user-defined conversions
-    // (first to create T from M and then to create Matcher<T> from T).
-    return polymorphic_matcher_or_value;
-  }
-
-  // M can't be implicitly converted to Matcher<T>, so M isn't a polymorphic
-  // matcher. It's a value of a type implicitly convertible to T. Use direct
-  // initialization to create a matcher.
-  static Matcher<T> CastImpl(const M& value,
-                             std::false_type /* convertible_to_matcher */,
-                             std::true_type /* convertible_to_T */) {
-    return Matcher<T>(ImplicitCast_<T>(value));
-  }
-
-  // M can't be implicitly converted to either Matcher<T> or T. Attempt to use
-  // polymorphic matcher Eq(value) in this case.
-  //
-  // Note that we first attempt to perform an implicit cast on the value and
-  // only fall back to the polymorphic Eq() matcher afterwards because the
-  // latter calls bool operator==(const Lhs& lhs, const Rhs& rhs) in the end
-  // which might be undefined even when Rhs is implicitly convertible to Lhs
-  // (e.g. std::pair<const int, int> vs. std::pair<int, int>).
-  //
-  // We don't define this method inline as we need the declaration of Eq().
-  static Matcher<T> CastImpl(const M& value,
-                             std::false_type /* convertible_to_matcher */,
-                             std::false_type /* convertible_to_T */);
-};
-
-// This more specialized version is used when MatcherCast()'s argument
-// is already a Matcher.  This only compiles when type T can be
-// statically converted to type U.
-template <typename T, typename U>
-class MatcherCastImpl<T, Matcher<U> > {
- public:
-  static Matcher<T> Cast(const Matcher<U>& source_matcher) {
-    return Matcher<T>(new Impl(source_matcher));
-  }
-
- private:
-  class Impl : public MatcherInterface<T> {
-   public:
-    explicit Impl(const Matcher<U>& source_matcher)
-        : source_matcher_(source_matcher) {}
-
-    // We delegate the matching logic to the source matcher.
-    bool MatchAndExplain(T x, MatchResultListener* listener) const override {
-      using FromType = typename std::remove_cv<typename std::remove_pointer<
-          typename std::remove_reference<T>::type>::type>::type;
-      using ToType = typename std::remove_cv<typename std::remove_pointer<
-          typename std::remove_reference<U>::type>::type>::type;
-      // Do not allow implicitly converting base*/& to derived*/&.
-      static_assert(
-          // Do not trigger if only one of them is a pointer. That implies a
-          // regular conversion and not a down_cast.
-          (std::is_pointer<typename std::remove_reference<T>::type>::value !=
-           std::is_pointer<typename std::remove_reference<U>::type>::value) ||
-              std::is_same<FromType, ToType>::value ||
-              !std::is_base_of<FromType, ToType>::value,
-          "Can't implicitly convert from <base> to <derived>");
-
-      // Do the cast to `U` explicitly if necessary.
-      // Otherwise, let implicit conversions do the trick.
-      using CastType =
-          typename std::conditional<std::is_convertible<T&, const U&>::value,
-                                    T&, U>::type;
-
-      return source_matcher_.MatchAndExplain(static_cast<CastType>(x),
-                                             listener);
-    }
-
-    void DescribeTo(::std::ostream* os) const override {
-      source_matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      source_matcher_.DescribeNegationTo(os);
-    }
-
-   private:
-    const Matcher<U> source_matcher_;
-  };
-};
-
-// This even more specialized version is used for efficiently casting
-// a matcher to its own type.
-template <typename T>
-class MatcherCastImpl<T, Matcher<T> > {
- public:
-  static Matcher<T> Cast(const Matcher<T>& matcher) { return matcher; }
-};
-
-// Template specialization for parameterless Matcher.
-template <typename Derived>
-class MatcherBaseImpl {
- public:
-  MatcherBaseImpl() = default;
-
-  template <typename T>
-  operator ::testing::Matcher<T>() const {  // NOLINT(runtime/explicit)
-    return ::testing::Matcher<T>(new
-                                 typename Derived::template gmock_Impl<T>());
-  }
-};
-
-// Template specialization for Matcher with parameters.
-template <template <typename...> class Derived, typename... Ts>
-class MatcherBaseImpl<Derived<Ts...>> {
- public:
-  // Mark the constructor explicit for single argument T to avoid implicit
-  // conversions.
-  template <typename E = std::enable_if<sizeof...(Ts) == 1>,
-            typename E::type* = nullptr>
-  explicit MatcherBaseImpl(Ts... params)
-      : params_(std::forward<Ts>(params)...) {}
-  template <typename E = std::enable_if<sizeof...(Ts) != 1>,
-            typename = typename E::type>
-  MatcherBaseImpl(Ts... params)  // NOLINT
-      : params_(std::forward<Ts>(params)...) {}
-
-  template <typename F>
-  operator ::testing::Matcher<F>() const {  // NOLINT(runtime/explicit)
-    return Apply<F>(MakeIndexSequence<sizeof...(Ts)>{});
-  }
-
- private:
-  template <typename F, std::size_t... tuple_ids>
-  ::testing::Matcher<F> Apply(IndexSequence<tuple_ids...>) const {
-    return ::testing::Matcher<F>(
-        new typename Derived<Ts...>::template gmock_Impl<F>(
-            std::get<tuple_ids>(params_)...));
-  }
-
-  const std::tuple<Ts...> params_;
-};
-
-}  // namespace internal
-
-// In order to be safe and clear, casting between different matcher
-// types is done explicitly via MatcherCast<T>(m), which takes a
-// matcher m and returns a Matcher<T>.  It compiles only when T can be
-// statically converted to the argument type of m.
-template <typename T, typename M>
-inline Matcher<T> MatcherCast(const M& matcher) {
-  return internal::MatcherCastImpl<T, M>::Cast(matcher);
-}
-
-// This overload handles polymorphic matchers and values only since
-// monomorphic matchers are handled by the next one.
-template <typename T, typename M>
-inline Matcher<T> SafeMatcherCast(const M& polymorphic_matcher_or_value) {
-  return MatcherCast<T>(polymorphic_matcher_or_value);
-}
-
-// This overload handles monomorphic matchers.
-//
-// In general, if type T can be implicitly converted to type U, we can
-// safely convert a Matcher<U> to a Matcher<T> (i.e. Matcher is
-// contravariant): just keep a copy of the original Matcher<U>, convert the
-// argument from type T to U, and then pass it to the underlying Matcher<U>.
-// The only exception is when U is a reference and T is not, as the
-// underlying Matcher<U> may be interested in the argument's address, which
-// is not preserved in the conversion from T to U.
-template <typename T, typename U>
-inline Matcher<T> SafeMatcherCast(const Matcher<U>& matcher) {
-  // Enforce that T can be implicitly converted to U.
-  static_assert(std::is_convertible<const T&, const U&>::value,
-                "T must be implicitly convertible to U");
-  // Enforce that we are not converting a non-reference type T to a reference
-  // type U.
-  GTEST_COMPILE_ASSERT_(
-      std::is_reference<T>::value || !std::is_reference<U>::value,
-      cannot_convert_non_reference_arg_to_reference);
-  // In case both T and U are arithmetic types, enforce that the
-  // conversion is not lossy.
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(T) RawT;
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(U) RawU;
-  constexpr bool kTIsOther = GMOCK_KIND_OF_(RawT) == internal::kOther;
-  constexpr bool kUIsOther = GMOCK_KIND_OF_(RawU) == internal::kOther;
-  GTEST_COMPILE_ASSERT_(
-      kTIsOther || kUIsOther ||
-      (internal::LosslessArithmeticConvertible<RawT, RawU>::value),
-      conversion_of_arithmetic_types_must_be_lossless);
-  return MatcherCast<T>(matcher);
-}
-
-// A<T>() returns a matcher that matches any value of type T.
-template <typename T>
-Matcher<T> A();
-
-// Anything inside the 'internal' namespace IS INTERNAL IMPLEMENTATION
-// and MUST NOT BE USED IN USER CODE!!!
-namespace internal {
-
-// If the explanation is not empty, prints it to the ostream.
-inline void PrintIfNotEmpty(const std::string& explanation,
-                            ::std::ostream* os) {
-  if (explanation != "" && os != nullptr) {
-    *os << ", " << explanation;
-  }
-}
-
-// Returns true if the given type name is easy to read by a human.
-// This is used to decide whether printing the type of a value might
-// be helpful.
-inline bool IsReadableTypeName(const std::string& type_name) {
-  // We consider a type name readable if it's short or doesn't contain
-  // a template or function type.
-  return (type_name.length() <= 20 ||
-          type_name.find_first_of("<(") == std::string::npos);
-}
-
-// Matches the value against the given matcher, prints the value and explains
-// the match result to the listener. Returns the match result.
-// 'listener' must not be NULL.
-// Value cannot be passed by const reference, because some matchers take a
-// non-const argument.
-template <typename Value, typename T>
-bool MatchPrintAndExplain(Value& value, const Matcher<T>& matcher,
-                          MatchResultListener* listener) {
-  if (!listener->IsInterested()) {
-    // If the listener is not interested, we do not need to construct the
-    // inner explanation.
-    return matcher.Matches(value);
-  }
-
-  StringMatchResultListener inner_listener;
-  const bool match = matcher.MatchAndExplain(value, &inner_listener);
-
-  UniversalPrint(value, listener->stream());
-#if GTEST_HAS_RTTI
-  const std::string& type_name = GetTypeName<Value>();
-  if (IsReadableTypeName(type_name))
-    *listener->stream() << " (of type " << type_name << ")";
-#endif
-  PrintIfNotEmpty(inner_listener.str(), listener->stream());
-
-  return match;
-}
-
-// An internal helper class for doing compile-time loop on a tuple's
-// fields.
-template <size_t N>
-class TuplePrefix {
- public:
-  // TuplePrefix<N>::Matches(matcher_tuple, value_tuple) returns true
-  // if and only if the first N fields of matcher_tuple matches
-  // the first N fields of value_tuple, respectively.
-  template <typename MatcherTuple, typename ValueTuple>
-  static bool Matches(const MatcherTuple& matcher_tuple,
-                      const ValueTuple& value_tuple) {
-    return TuplePrefix<N - 1>::Matches(matcher_tuple, value_tuple) &&
-           std::get<N - 1>(matcher_tuple).Matches(std::get<N - 1>(value_tuple));
-  }
-
-  // TuplePrefix<N>::ExplainMatchFailuresTo(matchers, values, os)
-  // describes failures in matching the first N fields of matchers
-  // against the first N fields of values.  If there is no failure,
-  // nothing will be streamed to os.
-  template <typename MatcherTuple, typename ValueTuple>
-  static void ExplainMatchFailuresTo(const MatcherTuple& matchers,
-                                     const ValueTuple& values,
-                                     ::std::ostream* os) {
-    // First, describes failures in the first N - 1 fields.
-    TuplePrefix<N - 1>::ExplainMatchFailuresTo(matchers, values, os);
-
-    // Then describes the failure (if any) in the (N - 1)-th (0-based)
-    // field.
-    typename std::tuple_element<N - 1, MatcherTuple>::type matcher =
-        std::get<N - 1>(matchers);
-    typedef typename std::tuple_element<N - 1, ValueTuple>::type Value;
-    const Value& value = std::get<N - 1>(values);
-    StringMatchResultListener listener;
-    if (!matcher.MatchAndExplain(value, &listener)) {
-      *os << "  Expected arg #" << N - 1 << ": ";
-      std::get<N - 1>(matchers).DescribeTo(os);
-      *os << "\n           Actual: ";
-      // We remove the reference in type Value to prevent the
-      // universal printer from printing the address of value, which
-      // isn't interesting to the user most of the time.  The
-      // matcher's MatchAndExplain() method handles the case when
-      // the address is interesting.
-      internal::UniversalPrint(value, os);
-      PrintIfNotEmpty(listener.str(), os);
-      *os << "\n";
-    }
-  }
-};
-
-// The base case.
-template <>
-class TuplePrefix<0> {
- public:
-  template <typename MatcherTuple, typename ValueTuple>
-  static bool Matches(const MatcherTuple& /* matcher_tuple */,
-                      const ValueTuple& /* value_tuple */) {
-    return true;
-  }
-
-  template <typename MatcherTuple, typename ValueTuple>
-  static void ExplainMatchFailuresTo(const MatcherTuple& /* matchers */,
-                                     const ValueTuple& /* values */,
-                                     ::std::ostream* /* os */) {}
-};
-
-// TupleMatches(matcher_tuple, value_tuple) returns true if and only if
-// all matchers in matcher_tuple match the corresponding fields in
-// value_tuple.  It is a compiler error if matcher_tuple and
-// value_tuple have different number of fields or incompatible field
-// types.
-template <typename MatcherTuple, typename ValueTuple>
-bool TupleMatches(const MatcherTuple& matcher_tuple,
-                  const ValueTuple& value_tuple) {
-  // Makes sure that matcher_tuple and value_tuple have the same
-  // number of fields.
-  GTEST_COMPILE_ASSERT_(std::tuple_size<MatcherTuple>::value ==
-                            std::tuple_size<ValueTuple>::value,
-                        matcher_and_value_have_different_numbers_of_fields);
-  return TuplePrefix<std::tuple_size<ValueTuple>::value>::Matches(matcher_tuple,
-                                                                  value_tuple);
-}
-
-// Describes failures in matching matchers against values.  If there
-// is no failure, nothing will be streamed to os.
-template <typename MatcherTuple, typename ValueTuple>
-void ExplainMatchFailureTupleTo(const MatcherTuple& matchers,
-                                const ValueTuple& values,
-                                ::std::ostream* os) {
-  TuplePrefix<std::tuple_size<MatcherTuple>::value>::ExplainMatchFailuresTo(
-      matchers, values, os);
-}
-
-// TransformTupleValues and its helper.
-//
-// TransformTupleValuesHelper hides the internal machinery that
-// TransformTupleValues uses to implement a tuple traversal.
-template <typename Tuple, typename Func, typename OutIter>
-class TransformTupleValuesHelper {
- private:
-  typedef ::std::tuple_size<Tuple> TupleSize;
-
- public:
-  // For each member of tuple 't', taken in order, evaluates '*out++ = f(t)'.
-  // Returns the final value of 'out' in case the caller needs it.
-  static OutIter Run(Func f, const Tuple& t, OutIter out) {
-    return IterateOverTuple<Tuple, TupleSize::value>()(f, t, out);
-  }
-
- private:
-  template <typename Tup, size_t kRemainingSize>
-  struct IterateOverTuple {
-    OutIter operator() (Func f, const Tup& t, OutIter out) const {
-      *out++ = f(::std::get<TupleSize::value - kRemainingSize>(t));
-      return IterateOverTuple<Tup, kRemainingSize - 1>()(f, t, out);
-    }
-  };
-  template <typename Tup>
-  struct IterateOverTuple<Tup, 0> {
-    OutIter operator() (Func /* f */, const Tup& /* t */, OutIter out) const {
-      return out;
-    }
-  };
-};
-
-// Successively invokes 'f(element)' on each element of the tuple 't',
-// appending each result to the 'out' iterator. Returns the final value
-// of 'out'.
-template <typename Tuple, typename Func, typename OutIter>
-OutIter TransformTupleValues(Func f, const Tuple& t, OutIter out) {
-  return TransformTupleValuesHelper<Tuple, Func, OutIter>::Run(f, t, out);
-}
-
-// Implements _, a matcher that matches any value of any
-// type.  This is a polymorphic matcher, so we need a template type
-// conversion operator to make it appearing as a Matcher<T> for any
-// type T.
-class AnythingMatcher {
- public:
-  using is_gtest_matcher = void;
-
-  template <typename T>
-  bool MatchAndExplain(const T& /* x */, std::ostream* /* listener */) const {
-    return true;
-  }
-  void DescribeTo(std::ostream* os) const { *os << "is anything"; }
-  void DescribeNegationTo(::std::ostream* os) const {
-    // This is mostly for completeness' sake, as it's not very useful
-    // to write Not(A<bool>()).  However we cannot completely rule out
-    // such a possibility, and it doesn't hurt to be prepared.
-    *os << "never matches";
-  }
-};
-
-// Implements the polymorphic IsNull() matcher, which matches any raw or smart
-// pointer that is NULL.
-class IsNullMatcher {
- public:
-  template <typename Pointer>
-  bool MatchAndExplain(const Pointer& p,
-                       MatchResultListener* /* listener */) const {
-    return p == nullptr;
-  }
-
-  void DescribeTo(::std::ostream* os) const { *os << "is NULL"; }
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "isn't NULL";
-  }
-};
-
-// Implements the polymorphic NotNull() matcher, which matches any raw or smart
-// pointer that is not NULL.
-class NotNullMatcher {
- public:
-  template <typename Pointer>
-  bool MatchAndExplain(const Pointer& p,
-                       MatchResultListener* /* listener */) const {
-    return p != nullptr;
-  }
-
-  void DescribeTo(::std::ostream* os) const { *os << "isn't NULL"; }
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "is NULL";
-  }
-};
-
-// Ref(variable) matches any argument that is a reference to
-// 'variable'.  This matcher is polymorphic as it can match any
-// super type of the type of 'variable'.
-//
-// The RefMatcher template class implements Ref(variable).  It can
-// only be instantiated with a reference type.  This prevents a user
-// from mistakenly using Ref(x) to match a non-reference function
-// argument.  For example, the following will righteously cause a
-// compiler error:
-//
-//   int n;
-//   Matcher<int> m1 = Ref(n);   // This won't compile.
-//   Matcher<int&> m2 = Ref(n);  // This will compile.
-template <typename T>
-class RefMatcher;
-
-template <typename T>
-class RefMatcher<T&> {
-  // Google Mock is a generic framework and thus needs to support
-  // mocking any function types, including those that take non-const
-  // reference arguments.  Therefore the template parameter T (and
-  // Super below) can be instantiated to either a const type or a
-  // non-const type.
- public:
-  // RefMatcher() takes a T& instead of const T&, as we want the
-  // compiler to catch using Ref(const_value) as a matcher for a
-  // non-const reference.
-  explicit RefMatcher(T& x) : object_(x) {}  // NOLINT
-
-  template <typename Super>
-  operator Matcher<Super&>() const {
-    // By passing object_ (type T&) to Impl(), which expects a Super&,
-    // we make sure that Super is a super type of T.  In particular,
-    // this catches using Ref(const_value) as a matcher for a
-    // non-const reference, as you cannot implicitly convert a const
-    // reference to a non-const reference.
-    return MakeMatcher(new Impl<Super>(object_));
-  }
-
- private:
-  template <typename Super>
-  class Impl : public MatcherInterface<Super&> {
-   public:
-    explicit Impl(Super& x) : object_(x) {}  // NOLINT
-
-    // MatchAndExplain() takes a Super& (as opposed to const Super&)
-    // in order to match the interface MatcherInterface<Super&>.
-    bool MatchAndExplain(Super& x,
-                         MatchResultListener* listener) const override {
-      *listener << "which is located @" << static_cast<const void*>(&x);
-      return &x == &object_;
-    }
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "references the variable ";
-      UniversalPrinter<Super&>::Print(object_, os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "does not reference the variable ";
-      UniversalPrinter<Super&>::Print(object_, os);
-    }
-
-   private:
-    const Super& object_;
-  };
-
-  T& object_;
-};
-
-// Polymorphic helper functions for narrow and wide string matchers.
-inline bool CaseInsensitiveCStringEquals(const char* lhs, const char* rhs) {
-  return String::CaseInsensitiveCStringEquals(lhs, rhs);
-}
-
-inline bool CaseInsensitiveCStringEquals(const wchar_t* lhs,
-                                         const wchar_t* rhs) {
-  return String::CaseInsensitiveWideCStringEquals(lhs, rhs);
-}
-
-// String comparison for narrow or wide strings that can have embedded NUL
-// characters.
-template <typename StringType>
-bool CaseInsensitiveStringEquals(const StringType& s1,
-                                 const StringType& s2) {
-  // Are the heads equal?
-  if (!CaseInsensitiveCStringEquals(s1.c_str(), s2.c_str())) {
-    return false;
-  }
-
-  // Skip the equal heads.
-  const typename StringType::value_type nul = 0;
-  const size_t i1 = s1.find(nul), i2 = s2.find(nul);
-
-  // Are we at the end of either s1 or s2?
-  if (i1 == StringType::npos || i2 == StringType::npos) {
-    return i1 == i2;
-  }
-
-  // Are the tails equal?
-  return CaseInsensitiveStringEquals(s1.substr(i1 + 1), s2.substr(i2 + 1));
-}
-
-// String matchers.
-
-// Implements equality-based string matchers like StrEq, StrCaseNe, and etc.
-template <typename StringType>
-class StrEqualityMatcher {
- public:
-  StrEqualityMatcher(StringType str, bool expect_eq, bool case_sensitive)
-      : string_(std::move(str)),
-        expect_eq_(expect_eq),
-        case_sensitive_(case_sensitive) {}
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  bool MatchAndExplain(const internal::StringView& s,
-                       MatchResultListener* listener) const {
-    // This should fail to compile if StringView is used with wide
-    // strings.
-    const StringType& str = std::string(s);
-    return MatchAndExplain(str, listener);
-  }
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-  // Accepts pointer types, particularly:
-  //   const char*
-  //   char*
-  //   const wchar_t*
-  //   wchar_t*
-  template <typename CharType>
-  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
-    if (s == nullptr) {
-      return !expect_eq_;
-    }
-    return MatchAndExplain(StringType(s), listener);
-  }
-
-  // Matches anything that can convert to StringType.
-  //
-  // This is a template, not just a plain function with const StringType&,
-  // because StringView has some interfering non-explicit constructors.
-  template <typename MatcheeStringType>
-  bool MatchAndExplain(const MatcheeStringType& s,
-                       MatchResultListener* /* listener */) const {
-    const StringType s2(s);
-    const bool eq = case_sensitive_ ? s2 == string_ :
-        CaseInsensitiveStringEquals(s2, string_);
-    return expect_eq_ == eq;
-  }
-
-  void DescribeTo(::std::ostream* os) const {
-    DescribeToHelper(expect_eq_, os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    DescribeToHelper(!expect_eq_, os);
-  }
-
- private:
-  void DescribeToHelper(bool expect_eq, ::std::ostream* os) const {
-    *os << (expect_eq ? "is " : "isn't ");
-    *os << "equal to ";
-    if (!case_sensitive_) {
-      *os << "(ignoring case) ";
-    }
-    UniversalPrint(string_, os);
-  }
-
-  const StringType string_;
-  const bool expect_eq_;
-  const bool case_sensitive_;
-};
-
-// Implements the polymorphic HasSubstr(substring) matcher, which
-// can be used as a Matcher<T> as long as T can be converted to a
-// string.
-template <typename StringType>
-class HasSubstrMatcher {
- public:
-  explicit HasSubstrMatcher(const StringType& substring)
-      : substring_(substring) {}
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  bool MatchAndExplain(const internal::StringView& s,
-                       MatchResultListener* listener) const {
-    // This should fail to compile if StringView is used with wide
-    // strings.
-    const StringType& str = std::string(s);
-    return MatchAndExplain(str, listener);
-  }
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-  // Accepts pointer types, particularly:
-  //   const char*
-  //   char*
-  //   const wchar_t*
-  //   wchar_t*
-  template <typename CharType>
-  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
-    return s != nullptr && MatchAndExplain(StringType(s), listener);
-  }
-
-  // Matches anything that can convert to StringType.
-  //
-  // This is a template, not just a plain function with const StringType&,
-  // because StringView has some interfering non-explicit constructors.
-  template <typename MatcheeStringType>
-  bool MatchAndExplain(const MatcheeStringType& s,
-                       MatchResultListener* /* listener */) const {
-    return StringType(s).find(substring_) != StringType::npos;
-  }
-
-  // Describes what this matcher matches.
-  void DescribeTo(::std::ostream* os) const {
-    *os << "has substring ";
-    UniversalPrint(substring_, os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "has no substring ";
-    UniversalPrint(substring_, os);
-  }
-
- private:
-  const StringType substring_;
-};
-
-// Implements the polymorphic StartsWith(substring) matcher, which
-// can be used as a Matcher<T> as long as T can be converted to a
-// string.
-template <typename StringType>
-class StartsWithMatcher {
- public:
-  explicit StartsWithMatcher(const StringType& prefix) : prefix_(prefix) {
-  }
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  bool MatchAndExplain(const internal::StringView& s,
-                       MatchResultListener* listener) const {
-    // This should fail to compile if StringView is used with wide
-    // strings.
-    const StringType& str = std::string(s);
-    return MatchAndExplain(str, listener);
-  }
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-  // Accepts pointer types, particularly:
-  //   const char*
-  //   char*
-  //   const wchar_t*
-  //   wchar_t*
-  template <typename CharType>
-  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
-    return s != nullptr && MatchAndExplain(StringType(s), listener);
-  }
-
-  // Matches anything that can convert to StringType.
-  //
-  // This is a template, not just a plain function with const StringType&,
-  // because StringView has some interfering non-explicit constructors.
-  template <typename MatcheeStringType>
-  bool MatchAndExplain(const MatcheeStringType& s,
-                       MatchResultListener* /* listener */) const {
-    const StringType& s2(s);
-    return s2.length() >= prefix_.length() &&
-        s2.substr(0, prefix_.length()) == prefix_;
-  }
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << "starts with ";
-    UniversalPrint(prefix_, os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "doesn't start with ";
-    UniversalPrint(prefix_, os);
-  }
-
- private:
-  const StringType prefix_;
-};
-
-// Implements the polymorphic EndsWith(substring) matcher, which
-// can be used as a Matcher<T> as long as T can be converted to a
-// string.
-template <typename StringType>
-class EndsWithMatcher {
- public:
-  explicit EndsWithMatcher(const StringType& suffix) : suffix_(suffix) {}
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  bool MatchAndExplain(const internal::StringView& s,
-                       MatchResultListener* listener) const {
-    // This should fail to compile if StringView is used with wide
-    // strings.
-    const StringType& str = std::string(s);
-    return MatchAndExplain(str, listener);
-  }
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-  // Accepts pointer types, particularly:
-  //   const char*
-  //   char*
-  //   const wchar_t*
-  //   wchar_t*
-  template <typename CharType>
-  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
-    return s != nullptr && MatchAndExplain(StringType(s), listener);
-  }
-
-  // Matches anything that can convert to StringType.
-  //
-  // This is a template, not just a plain function with const StringType&,
-  // because StringView has some interfering non-explicit constructors.
-  template <typename MatcheeStringType>
-  bool MatchAndExplain(const MatcheeStringType& s,
-                       MatchResultListener* /* listener */) const {
-    const StringType& s2(s);
-    return s2.length() >= suffix_.length() &&
-        s2.substr(s2.length() - suffix_.length()) == suffix_;
-  }
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << "ends with ";
-    UniversalPrint(suffix_, os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "doesn't end with ";
-    UniversalPrint(suffix_, os);
-  }
-
- private:
-  const StringType suffix_;
-};
-
-// Implements a matcher that compares the two fields of a 2-tuple
-// using one of the ==, <=, <, etc, operators.  The two fields being
-// compared don't have to have the same type.
-//
-// The matcher defined here is polymorphic (for example, Eq() can be
-// used to match a std::tuple<int, short>, a std::tuple<const long&, double>,
-// etc).  Therefore we use a template type conversion operator in the
-// implementation.
-template <typename D, typename Op>
-class PairMatchBase {
- public:
-  template <typename T1, typename T2>
-  operator Matcher<::std::tuple<T1, T2>>() const {
-    return Matcher<::std::tuple<T1, T2>>(new Impl<const ::std::tuple<T1, T2>&>);
-  }
-  template <typename T1, typename T2>
-  operator Matcher<const ::std::tuple<T1, T2>&>() const {
-    return MakeMatcher(new Impl<const ::std::tuple<T1, T2>&>);
-  }
-
- private:
-  static ::std::ostream& GetDesc(::std::ostream& os) {  // NOLINT
-    return os << D::Desc();
-  }
-
-  template <typename Tuple>
-  class Impl : public MatcherInterface<Tuple> {
-   public:
-    bool MatchAndExplain(Tuple args,
-                         MatchResultListener* /* listener */) const override {
-      return Op()(::std::get<0>(args), ::std::get<1>(args));
-    }
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "are " << GetDesc;
-    }
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "aren't " << GetDesc;
-    }
-  };
-};
-
-class Eq2Matcher : public PairMatchBase<Eq2Matcher, AnyEq> {
- public:
-  static const char* Desc() { return "an equal pair"; }
-};
-class Ne2Matcher : public PairMatchBase<Ne2Matcher, AnyNe> {
- public:
-  static const char* Desc() { return "an unequal pair"; }
-};
-class Lt2Matcher : public PairMatchBase<Lt2Matcher, AnyLt> {
- public:
-  static const char* Desc() { return "a pair where the first < the second"; }
-};
-class Gt2Matcher : public PairMatchBase<Gt2Matcher, AnyGt> {
- public:
-  static const char* Desc() { return "a pair where the first > the second"; }
-};
-class Le2Matcher : public PairMatchBase<Le2Matcher, AnyLe> {
- public:
-  static const char* Desc() { return "a pair where the first <= the second"; }
-};
-class Ge2Matcher : public PairMatchBase<Ge2Matcher, AnyGe> {
- public:
-  static const char* Desc() { return "a pair where the first >= the second"; }
-};
-
-// Implements the Not(...) matcher for a particular argument type T.
-// We do not nest it inside the NotMatcher class template, as that
-// will prevent different instantiations of NotMatcher from sharing
-// the same NotMatcherImpl<T> class.
-template <typename T>
-class NotMatcherImpl : public MatcherInterface<const T&> {
- public:
-  explicit NotMatcherImpl(const Matcher<T>& matcher)
-      : matcher_(matcher) {}
-
-  bool MatchAndExplain(const T& x,
-                       MatchResultListener* listener) const override {
-    return !matcher_.MatchAndExplain(x, listener);
-  }
-
-  void DescribeTo(::std::ostream* os) const override {
-    matcher_.DescribeNegationTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    matcher_.DescribeTo(os);
-  }
-
- private:
-  const Matcher<T> matcher_;
-};
-
-// Implements the Not(m) matcher, which matches a value that doesn't
-// match matcher m.
-template <typename InnerMatcher>
-class NotMatcher {
- public:
-  explicit NotMatcher(InnerMatcher matcher) : matcher_(matcher) {}
-
-  // This template type conversion operator allows Not(m) to be used
-  // to match any type m can match.
-  template <typename T>
-  operator Matcher<T>() const {
-    return Matcher<T>(new NotMatcherImpl<T>(SafeMatcherCast<T>(matcher_)));
-  }
-
- private:
-  InnerMatcher matcher_;
-};
-
-// Implements the AllOf(m1, m2) matcher for a particular argument type
-// T. We do not nest it inside the BothOfMatcher class template, as
-// that will prevent different instantiations of BothOfMatcher from
-// sharing the same BothOfMatcherImpl<T> class.
-template <typename T>
-class AllOfMatcherImpl : public MatcherInterface<const T&> {
- public:
-  explicit AllOfMatcherImpl(std::vector<Matcher<T> > matchers)
-      : matchers_(std::move(matchers)) {}
-
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "(";
-    for (size_t i = 0; i < matchers_.size(); ++i) {
-      if (i != 0) *os << ") and (";
-      matchers_[i].DescribeTo(os);
-    }
-    *os << ")";
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "(";
-    for (size_t i = 0; i < matchers_.size(); ++i) {
-      if (i != 0) *os << ") or (";
-      matchers_[i].DescribeNegationTo(os);
-    }
-    *os << ")";
-  }
-
-  bool MatchAndExplain(const T& x,
-                       MatchResultListener* listener) const override {
-    // If either matcher1_ or matcher2_ doesn't match x, we only need
-    // to explain why one of them fails.
-    std::string all_match_result;
-
-    for (size_t i = 0; i < matchers_.size(); ++i) {
-      StringMatchResultListener slistener;
-      if (matchers_[i].MatchAndExplain(x, &slistener)) {
-        if (all_match_result.empty()) {
-          all_match_result = slistener.str();
-        } else {
-          std::string result = slistener.str();
-          if (!result.empty()) {
-            all_match_result += ", and ";
-            all_match_result += result;
-          }
-        }
-      } else {
-        *listener << slistener.str();
-        return false;
-      }
-    }
-
-    // Otherwise we need to explain why *both* of them match.
-    *listener << all_match_result;
-    return true;
-  }
-
- private:
-  const std::vector<Matcher<T> > matchers_;
-};
-
-// VariadicMatcher is used for the variadic implementation of
-// AllOf(m_1, m_2, ...) and AnyOf(m_1, m_2, ...).
-// CombiningMatcher<T> is used to recursively combine the provided matchers
-// (of type Args...).
-template <template <typename T> class CombiningMatcher, typename... Args>
-class VariadicMatcher {
- public:
-  VariadicMatcher(const Args&... matchers)  // NOLINT
-      : matchers_(matchers...) {
-    static_assert(sizeof...(Args) > 0, "Must have at least one matcher.");
-  }
-
-  VariadicMatcher(const VariadicMatcher&) = default;
-  VariadicMatcher& operator=(const VariadicMatcher&) = delete;
-
-  // This template type conversion operator allows an
-  // VariadicMatcher<Matcher1, Matcher2...> object to match any type that
-  // all of the provided matchers (Matcher1, Matcher2, ...) can match.
-  template <typename T>
-  operator Matcher<T>() const {
-    std::vector<Matcher<T> > values;
-    CreateVariadicMatcher<T>(&values, std::integral_constant<size_t, 0>());
-    return Matcher<T>(new CombiningMatcher<T>(std::move(values)));
-  }
-
- private:
-  template <typename T, size_t I>
-  void CreateVariadicMatcher(std::vector<Matcher<T> >* values,
-                             std::integral_constant<size_t, I>) const {
-    values->push_back(SafeMatcherCast<T>(std::get<I>(matchers_)));
-    CreateVariadicMatcher<T>(values, std::integral_constant<size_t, I + 1>());
-  }
-
-  template <typename T>
-  void CreateVariadicMatcher(
-      std::vector<Matcher<T> >*,
-      std::integral_constant<size_t, sizeof...(Args)>) const {}
-
-  std::tuple<Args...> matchers_;
-};
-
-template <typename... Args>
-using AllOfMatcher = VariadicMatcher<AllOfMatcherImpl, Args...>;
-
-// Implements the AnyOf(m1, m2) matcher for a particular argument type
-// T.  We do not nest it inside the AnyOfMatcher class template, as
-// that will prevent different instantiations of AnyOfMatcher from
-// sharing the same EitherOfMatcherImpl<T> class.
-template <typename T>
-class AnyOfMatcherImpl : public MatcherInterface<const T&> {
- public:
-  explicit AnyOfMatcherImpl(std::vector<Matcher<T> > matchers)
-      : matchers_(std::move(matchers)) {}
-
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "(";
-    for (size_t i = 0; i < matchers_.size(); ++i) {
-      if (i != 0) *os << ") or (";
-      matchers_[i].DescribeTo(os);
-    }
-    *os << ")";
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "(";
-    for (size_t i = 0; i < matchers_.size(); ++i) {
-      if (i != 0) *os << ") and (";
-      matchers_[i].DescribeNegationTo(os);
-    }
-    *os << ")";
-  }
-
-  bool MatchAndExplain(const T& x,
-                       MatchResultListener* listener) const override {
-    std::string no_match_result;
-
-    // If either matcher1_ or matcher2_ matches x, we just need to
-    // explain why *one* of them matches.
-    for (size_t i = 0; i < matchers_.size(); ++i) {
-      StringMatchResultListener slistener;
-      if (matchers_[i].MatchAndExplain(x, &slistener)) {
-        *listener << slistener.str();
-        return true;
-      } else {
-        if (no_match_result.empty()) {
-          no_match_result = slistener.str();
-        } else {
-          std::string result = slistener.str();
-          if (!result.empty()) {
-            no_match_result += ", and ";
-            no_match_result += result;
-          }
-        }
-      }
-    }
-
-    // Otherwise we need to explain why *both* of them fail.
-    *listener << no_match_result;
-    return false;
-  }
-
- private:
-  const std::vector<Matcher<T> > matchers_;
-};
-
-// AnyOfMatcher is used for the variadic implementation of AnyOf(m_1, m_2, ...).
-template <typename... Args>
-using AnyOfMatcher = VariadicMatcher<AnyOfMatcherImpl, Args...>;
-
-// Wrapper for implementation of Any/AllOfArray().
-template <template <class> class MatcherImpl, typename T>
-class SomeOfArrayMatcher {
- public:
-  // Constructs the matcher from a sequence of element values or
-  // element matchers.
-  template <typename Iter>
-  SomeOfArrayMatcher(Iter first, Iter last) : matchers_(first, last) {}
-
-  template <typename U>
-  operator Matcher<U>() const {  // NOLINT
-    using RawU = typename std::decay<U>::type;
-    std::vector<Matcher<RawU>> matchers;
-    for (const auto& matcher : matchers_) {
-      matchers.push_back(MatcherCast<RawU>(matcher));
-    }
-    return Matcher<U>(new MatcherImpl<RawU>(std::move(matchers)));
-  }
-
- private:
-  const ::std::vector<T> matchers_;
-};
-
-template <typename T>
-using AllOfArrayMatcher = SomeOfArrayMatcher<AllOfMatcherImpl, T>;
-
-template <typename T>
-using AnyOfArrayMatcher = SomeOfArrayMatcher<AnyOfMatcherImpl, T>;
-
-// Used for implementing Truly(pred), which turns a predicate into a
-// matcher.
-template <typename Predicate>
-class TrulyMatcher {
- public:
-  explicit TrulyMatcher(Predicate pred) : predicate_(pred) {}
-
-  // This method template allows Truly(pred) to be used as a matcher
-  // for type T where T is the argument type of predicate 'pred'.  The
-  // argument is passed by reference as the predicate may be
-  // interested in the address of the argument.
-  template <typename T>
-  bool MatchAndExplain(T& x,  // NOLINT
-                       MatchResultListener* listener) const {
-    // Without the if-statement, MSVC sometimes warns about converting
-    // a value to bool (warning 4800).
-    //
-    // We cannot write 'return !!predicate_(x);' as that doesn't work
-    // when predicate_(x) returns a class convertible to bool but
-    // having no operator!().
-    if (predicate_(x))
-      return true;
-    *listener << "didn't satisfy the given predicate";
-    return false;
-  }
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << "satisfies the given predicate";
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "doesn't satisfy the given predicate";
-  }
-
- private:
-  Predicate predicate_;
-};
-
-// Used for implementing Matches(matcher), which turns a matcher into
-// a predicate.
-template <typename M>
-class MatcherAsPredicate {
- public:
-  explicit MatcherAsPredicate(M matcher) : matcher_(matcher) {}
-
-  // This template operator() allows Matches(m) to be used as a
-  // predicate on type T where m is a matcher on type T.
-  //
-  // The argument x is passed by reference instead of by value, as
-  // some matcher may be interested in its address (e.g. as in
-  // Matches(Ref(n))(x)).
-  template <typename T>
-  bool operator()(const T& x) const {
-    // We let matcher_ commit to a particular type here instead of
-    // when the MatcherAsPredicate object was constructed.  This
-    // allows us to write Matches(m) where m is a polymorphic matcher
-    // (e.g. Eq(5)).
-    //
-    // If we write Matcher<T>(matcher_).Matches(x) here, it won't
-    // compile when matcher_ has type Matcher<const T&>; if we write
-    // Matcher<const T&>(matcher_).Matches(x) here, it won't compile
-    // when matcher_ has type Matcher<T>; if we just write
-    // matcher_.Matches(x), it won't compile when matcher_ is
-    // polymorphic, e.g. Eq(5).
-    //
-    // MatcherCast<const T&>() is necessary for making the code work
-    // in all of the above situations.
-    return MatcherCast<const T&>(matcher_).Matches(x);
-  }
-
- private:
-  M matcher_;
-};
-
-// For implementing ASSERT_THAT() and EXPECT_THAT().  The template
-// argument M must be a type that can be converted to a matcher.
-template <typename M>
-class PredicateFormatterFromMatcher {
- public:
-  explicit PredicateFormatterFromMatcher(M m) : matcher_(std::move(m)) {}
-
-  // This template () operator allows a PredicateFormatterFromMatcher
-  // object to act as a predicate-formatter suitable for using with
-  // Google Test's EXPECT_PRED_FORMAT1() macro.
-  template <typename T>
-  AssertionResult operator()(const char* value_text, const T& x) const {
-    // We convert matcher_ to a Matcher<const T&> *now* instead of
-    // when the PredicateFormatterFromMatcher object was constructed,
-    // as matcher_ may be polymorphic (e.g. NotNull()) and we won't
-    // know which type to instantiate it to until we actually see the
-    // type of x here.
-    //
-    // We write SafeMatcherCast<const T&>(matcher_) instead of
-    // Matcher<const T&>(matcher_), as the latter won't compile when
-    // matcher_ has type Matcher<T> (e.g. An<int>()).
-    // We don't write MatcherCast<const T&> either, as that allows
-    // potentially unsafe downcasting of the matcher argument.
-    const Matcher<const T&> matcher = SafeMatcherCast<const T&>(matcher_);
-
-    // The expected path here is that the matcher should match (i.e. that most
-    // tests pass) so optimize for this case.
-    if (matcher.Matches(x)) {
-      return AssertionSuccess();
-    }
-
-    ::std::stringstream ss;
-    ss << "Value of: " << value_text << "\n"
-       << "Expected: ";
-    matcher.DescribeTo(&ss);
-
-    // Rerun the matcher to "PrintAndExplain" the failure.
-    StringMatchResultListener listener;
-    if (MatchPrintAndExplain(x, matcher, &listener)) {
-      ss << "\n  The matcher failed on the initial attempt; but passed when "
-            "rerun to generate the explanation.";
-    }
-    ss << "\n  Actual: " << listener.str();
-    return AssertionFailure() << ss.str();
-  }
-
- private:
-  const M matcher_;
-};
-
-// A helper function for converting a matcher to a predicate-formatter
-// without the user needing to explicitly write the type.  This is
-// used for implementing ASSERT_THAT() and EXPECT_THAT().
-// Implementation detail: 'matcher' is received by-value to force decaying.
-template <typename M>
-inline PredicateFormatterFromMatcher<M>
-MakePredicateFormatterFromMatcher(M matcher) {
-  return PredicateFormatterFromMatcher<M>(std::move(matcher));
-}
-
-// Implements the polymorphic IsNan() matcher, which matches any floating type
-// value that is Nan.
-class IsNanMatcher {
- public:
-  template <typename FloatType>
-  bool MatchAndExplain(const FloatType& f,
-                       MatchResultListener* /* listener */) const {
-    return (::std::isnan)(f);
-  }
-
-  void DescribeTo(::std::ostream* os) const { *os << "is NaN"; }
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "isn't NaN";
-  }
-};
-
-// Implements the polymorphic floating point equality matcher, which matches
-// two float values using ULP-based approximation or, optionally, a
-// user-specified epsilon.  The template is meant to be instantiated with
-// FloatType being either float or double.
-template <typename FloatType>
-class FloatingEqMatcher {
- public:
-  // Constructor for FloatingEqMatcher.
-  // The matcher's input will be compared with expected.  The matcher treats two
-  // NANs as equal if nan_eq_nan is true.  Otherwise, under IEEE standards,
-  // equality comparisons between NANs will always return false.  We specify a
-  // negative max_abs_error_ term to indicate that ULP-based approximation will
-  // be used for comparison.
-  FloatingEqMatcher(FloatType expected, bool nan_eq_nan) :
-    expected_(expected), nan_eq_nan_(nan_eq_nan), max_abs_error_(-1) {
-  }
-
-  // Constructor that supports a user-specified max_abs_error that will be used
-  // for comparison instead of ULP-based approximation.  The max absolute
-  // should be non-negative.
-  FloatingEqMatcher(FloatType expected, bool nan_eq_nan,
-                    FloatType max_abs_error)
-      : expected_(expected),
-        nan_eq_nan_(nan_eq_nan),
-        max_abs_error_(max_abs_error) {
-    GTEST_CHECK_(max_abs_error >= 0)
-        << ", where max_abs_error is" << max_abs_error;
-  }
-
-  // Implements floating point equality matcher as a Matcher<T>.
-  template <typename T>
-  class Impl : public MatcherInterface<T> {
-   public:
-    Impl(FloatType expected, bool nan_eq_nan, FloatType max_abs_error)
-        : expected_(expected),
-          nan_eq_nan_(nan_eq_nan),
-          max_abs_error_(max_abs_error) {}
-
-    bool MatchAndExplain(T value,
-                         MatchResultListener* listener) const override {
-      const FloatingPoint<FloatType> actual(value), expected(expected_);
-
-      // Compares NaNs first, if nan_eq_nan_ is true.
-      if (actual.is_nan() || expected.is_nan()) {
-        if (actual.is_nan() && expected.is_nan()) {
-          return nan_eq_nan_;
-        }
-        // One is nan; the other is not nan.
-        return false;
-      }
-      if (HasMaxAbsError()) {
-        // We perform an equality check so that inf will match inf, regardless
-        // of error bounds.  If the result of value - expected_ would result in
-        // overflow or if either value is inf, the default result is infinity,
-        // which should only match if max_abs_error_ is also infinity.
-        if (value == expected_) {
-          return true;
-        }
-
-        const FloatType diff = value - expected_;
-        if (::std::fabs(diff) <= max_abs_error_) {
-          return true;
-        }
-
-        if (listener->IsInterested()) {
-          *listener << "which is " << diff << " from " << expected_;
-        }
-        return false;
-      } else {
-        return actual.AlmostEquals(expected);
-      }
-    }
-
-    void DescribeTo(::std::ostream* os) const override {
-      // os->precision() returns the previously set precision, which we
-      // store to restore the ostream to its original configuration
-      // after outputting.
-      const ::std::streamsize old_precision = os->precision(
-          ::std::numeric_limits<FloatType>::digits10 + 2);
-      if (FloatingPoint<FloatType>(expected_).is_nan()) {
-        if (nan_eq_nan_) {
-          *os << "is NaN";
-        } else {
-          *os << "never matches";
-        }
-      } else {
-        *os << "is approximately " << expected_;
-        if (HasMaxAbsError()) {
-          *os << " (absolute error <= " << max_abs_error_ << ")";
-        }
-      }
-      os->precision(old_precision);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      // As before, get original precision.
-      const ::std::streamsize old_precision = os->precision(
-          ::std::numeric_limits<FloatType>::digits10 + 2);
-      if (FloatingPoint<FloatType>(expected_).is_nan()) {
-        if (nan_eq_nan_) {
-          *os << "isn't NaN";
-        } else {
-          *os << "is anything";
-        }
-      } else {
-        *os << "isn't approximately " << expected_;
-        if (HasMaxAbsError()) {
-          *os << " (absolute error > " << max_abs_error_ << ")";
-        }
-      }
-      // Restore original precision.
-      os->precision(old_precision);
-    }
-
-   private:
-    bool HasMaxAbsError() const {
-      return max_abs_error_ >= 0;
-    }
-
-    const FloatType expected_;
-    const bool nan_eq_nan_;
-    // max_abs_error will be used for value comparison when >= 0.
-    const FloatType max_abs_error_;
-  };
-
-  // The following 3 type conversion operators allow FloatEq(expected) and
-  // NanSensitiveFloatEq(expected) to be used as a Matcher<float>, a
-  // Matcher<const float&>, or a Matcher<float&>, but nothing else.
-  operator Matcher<FloatType>() const {
-    return MakeMatcher(
-        new Impl<FloatType>(expected_, nan_eq_nan_, max_abs_error_));
-  }
-
-  operator Matcher<const FloatType&>() const {
-    return MakeMatcher(
-        new Impl<const FloatType&>(expected_, nan_eq_nan_, max_abs_error_));
-  }
-
-  operator Matcher<FloatType&>() const {
-    return MakeMatcher(
-        new Impl<FloatType&>(expected_, nan_eq_nan_, max_abs_error_));
-  }
-
- private:
-  const FloatType expected_;
-  const bool nan_eq_nan_;
-  // max_abs_error will be used for value comparison when >= 0.
-  const FloatType max_abs_error_;
-};
-
-// A 2-tuple ("binary") wrapper around FloatingEqMatcher:
-// FloatingEq2Matcher() matches (x, y) by matching FloatingEqMatcher(x, false)
-// against y, and FloatingEq2Matcher(e) matches FloatingEqMatcher(x, false, e)
-// against y. The former implements "Eq", the latter "Near". At present, there
-// is no version that compares NaNs as equal.
-template <typename FloatType>
-class FloatingEq2Matcher {
- public:
-  FloatingEq2Matcher() { Init(-1, false); }
-
-  explicit FloatingEq2Matcher(bool nan_eq_nan) { Init(-1, nan_eq_nan); }
-
-  explicit FloatingEq2Matcher(FloatType max_abs_error) {
-    Init(max_abs_error, false);
-  }
-
-  FloatingEq2Matcher(FloatType max_abs_error, bool nan_eq_nan) {
-    Init(max_abs_error, nan_eq_nan);
-  }
-
-  template <typename T1, typename T2>
-  operator Matcher<::std::tuple<T1, T2>>() const {
-    return MakeMatcher(
-        new Impl<::std::tuple<T1, T2>>(max_abs_error_, nan_eq_nan_));
-  }
-  template <typename T1, typename T2>
-  operator Matcher<const ::std::tuple<T1, T2>&>() const {
-    return MakeMatcher(
-        new Impl<const ::std::tuple<T1, T2>&>(max_abs_error_, nan_eq_nan_));
-  }
-
- private:
-  static ::std::ostream& GetDesc(::std::ostream& os) {  // NOLINT
-    return os << "an almost-equal pair";
-  }
-
-  template <typename Tuple>
-  class Impl : public MatcherInterface<Tuple> {
-   public:
-    Impl(FloatType max_abs_error, bool nan_eq_nan) :
-        max_abs_error_(max_abs_error),
-        nan_eq_nan_(nan_eq_nan) {}
-
-    bool MatchAndExplain(Tuple args,
-                         MatchResultListener* listener) const override {
-      if (max_abs_error_ == -1) {
-        FloatingEqMatcher<FloatType> fm(::std::get<0>(args), nan_eq_nan_);
-        return static_cast<Matcher<FloatType>>(fm).MatchAndExplain(
-            ::std::get<1>(args), listener);
-      } else {
-        FloatingEqMatcher<FloatType> fm(::std::get<0>(args), nan_eq_nan_,
-                                        max_abs_error_);
-        return static_cast<Matcher<FloatType>>(fm).MatchAndExplain(
-            ::std::get<1>(args), listener);
-      }
-    }
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "are " << GetDesc;
-    }
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "aren't " << GetDesc;
-    }
-
-   private:
-    FloatType max_abs_error_;
-    const bool nan_eq_nan_;
-  };
-
-  void Init(FloatType max_abs_error_val, bool nan_eq_nan_val) {
-    max_abs_error_ = max_abs_error_val;
-    nan_eq_nan_ = nan_eq_nan_val;
-  }
-  FloatType max_abs_error_;
-  bool nan_eq_nan_;
-};
-
-// Implements the Pointee(m) matcher for matching a pointer whose
-// pointee matches matcher m.  The pointer can be either raw or smart.
-template <typename InnerMatcher>
-class PointeeMatcher {
- public:
-  explicit PointeeMatcher(const InnerMatcher& matcher) : matcher_(matcher) {}
-
-  // This type conversion operator template allows Pointee(m) to be
-  // used as a matcher for any pointer type whose pointee type is
-  // compatible with the inner matcher, where type Pointer can be
-  // either a raw pointer or a smart pointer.
-  //
-  // The reason we do this instead of relying on
-  // MakePolymorphicMatcher() is that the latter is not flexible
-  // enough for implementing the DescribeTo() method of Pointee().
-  template <typename Pointer>
-  operator Matcher<Pointer>() const {
-    return Matcher<Pointer>(new Impl<const Pointer&>(matcher_));
-  }
-
- private:
-  // The monomorphic implementation that works for a particular pointer type.
-  template <typename Pointer>
-  class Impl : public MatcherInterface<Pointer> {
-   public:
-    using Pointee =
-        typename std::pointer_traits<GTEST_REMOVE_REFERENCE_AND_CONST_(
-            Pointer)>::element_type;
-
-    explicit Impl(const InnerMatcher& matcher)
-        : matcher_(MatcherCast<const Pointee&>(matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "points to a value that ";
-      matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "does not point to a value that ";
-      matcher_.DescribeTo(os);
-    }
-
-    bool MatchAndExplain(Pointer pointer,
-                         MatchResultListener* listener) const override {
-      if (GetRawPointer(pointer) == nullptr) return false;
-
-      *listener << "which points to ";
-      return MatchPrintAndExplain(*pointer, matcher_, listener);
-    }
-
-   private:
-    const Matcher<const Pointee&> matcher_;
-  };
-
-  const InnerMatcher matcher_;
-};
-
-// Implements the Pointer(m) matcher
-// Implements the Pointer(m) matcher for matching a pointer that matches matcher
-// m.  The pointer can be either raw or smart, and will match `m` against the
-// raw pointer.
-template <typename InnerMatcher>
-class PointerMatcher {
- public:
-  explicit PointerMatcher(const InnerMatcher& matcher) : matcher_(matcher) {}
-
-  // This type conversion operator template allows Pointer(m) to be
-  // used as a matcher for any pointer type whose pointer type is
-  // compatible with the inner matcher, where type PointerType can be
-  // either a raw pointer or a smart pointer.
-  //
-  // The reason we do this instead of relying on
-  // MakePolymorphicMatcher() is that the latter is not flexible
-  // enough for implementing the DescribeTo() method of Pointer().
-  template <typename PointerType>
-  operator Matcher<PointerType>() const {  // NOLINT
-    return Matcher<PointerType>(new Impl<const PointerType&>(matcher_));
-  }
-
- private:
-  // The monomorphic implementation that works for a particular pointer type.
-  template <typename PointerType>
-  class Impl : public MatcherInterface<PointerType> {
-   public:
-    using Pointer =
-        const typename std::pointer_traits<GTEST_REMOVE_REFERENCE_AND_CONST_(
-            PointerType)>::element_type*;
-
-    explicit Impl(const InnerMatcher& matcher)
-        : matcher_(MatcherCast<Pointer>(matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "is a pointer that ";
-      matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "is not a pointer that ";
-      matcher_.DescribeTo(os);
-    }
-
-    bool MatchAndExplain(PointerType pointer,
-                         MatchResultListener* listener) const override {
-      *listener << "which is a pointer that ";
-      Pointer p = GetRawPointer(pointer);
-      return MatchPrintAndExplain(p, matcher_, listener);
-    }
-
-   private:
-    Matcher<Pointer> matcher_;
-  };
-
-  const InnerMatcher matcher_;
-};
-
-#if GTEST_HAS_RTTI
-// Implements the WhenDynamicCastTo<T>(m) matcher that matches a pointer or
-// reference that matches inner_matcher when dynamic_cast<T> is applied.
-// The result of dynamic_cast<To> is forwarded to the inner matcher.
-// If To is a pointer and the cast fails, the inner matcher will receive NULL.
-// If To is a reference and the cast fails, this matcher returns false
-// immediately.
-template <typename To>
-class WhenDynamicCastToMatcherBase {
- public:
-  explicit WhenDynamicCastToMatcherBase(const Matcher<To>& matcher)
-      : matcher_(matcher) {}
-
-  void DescribeTo(::std::ostream* os) const {
-    GetCastTypeDescription(os);
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    GetCastTypeDescription(os);
-    matcher_.DescribeNegationTo(os);
-  }
-
- protected:
-  const Matcher<To> matcher_;
-
-  static std::string GetToName() {
-    return GetTypeName<To>();
-  }
-
- private:
-  static void GetCastTypeDescription(::std::ostream* os) {
-    *os << "when dynamic_cast to " << GetToName() << ", ";
-  }
-};
-
-// Primary template.
-// To is a pointer. Cast and forward the result.
-template <typename To>
-class WhenDynamicCastToMatcher : public WhenDynamicCastToMatcherBase<To> {
- public:
-  explicit WhenDynamicCastToMatcher(const Matcher<To>& matcher)
-      : WhenDynamicCastToMatcherBase<To>(matcher) {}
-
-  template <typename From>
-  bool MatchAndExplain(From from, MatchResultListener* listener) const {
-    To to = dynamic_cast<To>(from);
-    return MatchPrintAndExplain(to, this->matcher_, listener);
-  }
-};
-
-// Specialize for references.
-// In this case we return false if the dynamic_cast fails.
-template <typename To>
-class WhenDynamicCastToMatcher<To&> : public WhenDynamicCastToMatcherBase<To&> {
- public:
-  explicit WhenDynamicCastToMatcher(const Matcher<To&>& matcher)
-      : WhenDynamicCastToMatcherBase<To&>(matcher) {}
-
-  template <typename From>
-  bool MatchAndExplain(From& from, MatchResultListener* listener) const {
-    // We don't want an std::bad_cast here, so do the cast with pointers.
-    To* to = dynamic_cast<To*>(&from);
-    if (to == nullptr) {
-      *listener << "which cannot be dynamic_cast to " << this->GetToName();
-      return false;
-    }
-    return MatchPrintAndExplain(*to, this->matcher_, listener);
-  }
-};
-#endif  // GTEST_HAS_RTTI
-
-// Implements the Field() matcher for matching a field (i.e. member
-// variable) of an object.
-template <typename Class, typename FieldType>
-class FieldMatcher {
- public:
-  FieldMatcher(FieldType Class::*field,
-               const Matcher<const FieldType&>& matcher)
-      : field_(field), matcher_(matcher), whose_field_("whose given field ") {}
-
-  FieldMatcher(const std::string& field_name, FieldType Class::*field,
-               const Matcher<const FieldType&>& matcher)
-      : field_(field),
-        matcher_(matcher),
-        whose_field_("whose field `" + field_name + "` ") {}
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << "is an object " << whose_field_;
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "is an object " << whose_field_;
-    matcher_.DescribeNegationTo(os);
-  }
-
-  template <typename T>
-  bool MatchAndExplain(const T& value, MatchResultListener* listener) const {
-    // FIXME: The dispatch on std::is_pointer was introduced as a workaround for
-    // a compiler bug, and can now be removed.
-    return MatchAndExplainImpl(
-        typename std::is_pointer<typename std::remove_const<T>::type>::type(),
-        value, listener);
-  }
-
- private:
-  bool MatchAndExplainImpl(std::false_type /* is_not_pointer */,
-                           const Class& obj,
-                           MatchResultListener* listener) const {
-    *listener << whose_field_ << "is ";
-    return MatchPrintAndExplain(obj.*field_, matcher_, listener);
-  }
-
-  bool MatchAndExplainImpl(std::true_type /* is_pointer */, const Class* p,
-                           MatchResultListener* listener) const {
-    if (p == nullptr) return false;
-
-    *listener << "which points to an object ";
-    // Since *p has a field, it must be a class/struct/union type and
-    // thus cannot be a pointer.  Therefore we pass false_type() as
-    // the first argument.
-    return MatchAndExplainImpl(std::false_type(), *p, listener);
-  }
-
-  const FieldType Class::*field_;
-  const Matcher<const FieldType&> matcher_;
-
-  // Contains either "whose given field " if the name of the field is unknown
-  // or "whose field `name_of_field` " if the name is known.
-  const std::string whose_field_;
-};
-
-// Implements the Property() matcher for matching a property
-// (i.e. return value of a getter method) of an object.
-//
-// Property is a const-qualified member function of Class returning
-// PropertyType.
-template <typename Class, typename PropertyType, typename Property>
-class PropertyMatcher {
- public:
-  typedef const PropertyType& RefToConstProperty;
-
-  PropertyMatcher(Property property, const Matcher<RefToConstProperty>& matcher)
-      : property_(property),
-        matcher_(matcher),
-        whose_property_("whose given property ") {}
-
-  PropertyMatcher(const std::string& property_name, Property property,
-                  const Matcher<RefToConstProperty>& matcher)
-      : property_(property),
-        matcher_(matcher),
-        whose_property_("whose property `" + property_name + "` ") {}
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << "is an object " << whose_property_;
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "is an object " << whose_property_;
-    matcher_.DescribeNegationTo(os);
-  }
-
-  template <typename T>
-  bool MatchAndExplain(const T&value, MatchResultListener* listener) const {
-    return MatchAndExplainImpl(
-        typename std::is_pointer<typename std::remove_const<T>::type>::type(),
-        value, listener);
-  }
-
- private:
-  bool MatchAndExplainImpl(std::false_type /* is_not_pointer */,
-                           const Class& obj,
-                           MatchResultListener* listener) const {
-    *listener << whose_property_ << "is ";
-    // Cannot pass the return value (for example, int) to MatchPrintAndExplain,
-    // which takes a non-const reference as argument.
-    RefToConstProperty result = (obj.*property_)();
-    return MatchPrintAndExplain(result, matcher_, listener);
-  }
-
-  bool MatchAndExplainImpl(std::true_type /* is_pointer */, const Class* p,
-                           MatchResultListener* listener) const {
-    if (p == nullptr) return false;
-
-    *listener << "which points to an object ";
-    // Since *p has a property method, it must be a class/struct/union
-    // type and thus cannot be a pointer.  Therefore we pass
-    // false_type() as the first argument.
-    return MatchAndExplainImpl(std::false_type(), *p, listener);
-  }
-
-  Property property_;
-  const Matcher<RefToConstProperty> matcher_;
-
-  // Contains either "whose given property " if the name of the property is
-  // unknown or "whose property `name_of_property` " if the name is known.
-  const std::string whose_property_;
-};
-
-// Type traits specifying various features of different functors for ResultOf.
-// The default template specifies features for functor objects.
-template <typename Functor>
-struct CallableTraits {
-  typedef Functor StorageType;
-
-  static void CheckIsValid(Functor /* functor */) {}
-
-  template <typename T>
-  static auto Invoke(Functor f, const T& arg) -> decltype(f(arg)) {
-    return f(arg);
-  }
-};
-
-// Specialization for function pointers.
-template <typename ArgType, typename ResType>
-struct CallableTraits<ResType(*)(ArgType)> {
-  typedef ResType ResultType;
-  typedef ResType(*StorageType)(ArgType);
-
-  static void CheckIsValid(ResType(*f)(ArgType)) {
-    GTEST_CHECK_(f != nullptr)
-        << "NULL function pointer is passed into ResultOf().";
-  }
-  template <typename T>
-  static ResType Invoke(ResType(*f)(ArgType), T arg) {
-    return (*f)(arg);
-  }
-};
-
-// Implements the ResultOf() matcher for matching a return value of a
-// unary function of an object.
-template <typename Callable, typename InnerMatcher>
-class ResultOfMatcher {
- public:
-  ResultOfMatcher(Callable callable, InnerMatcher matcher)
-      : callable_(std::move(callable)), matcher_(std::move(matcher)) {
-    CallableTraits<Callable>::CheckIsValid(callable_);
-  }
-
-  template <typename T>
-  operator Matcher<T>() const {
-    return Matcher<T>(new Impl<const T&>(callable_, matcher_));
-  }
-
- private:
-  typedef typename CallableTraits<Callable>::StorageType CallableStorageType;
-
-  template <typename T>
-  class Impl : public MatcherInterface<T> {
-    using ResultType = decltype(CallableTraits<Callable>::template Invoke<T>(
-        std::declval<CallableStorageType>(), std::declval<T>()));
-
-   public:
-    template <typename M>
-    Impl(const CallableStorageType& callable, const M& matcher)
-        : callable_(callable), matcher_(MatcherCast<ResultType>(matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "is mapped by the given callable to a value that ";
-      matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "is mapped by the given callable to a value that ";
-      matcher_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(T obj, MatchResultListener* listener) const override {
-      *listener << "which is mapped by the given callable to ";
-      // Cannot pass the return value directly to MatchPrintAndExplain, which
-      // takes a non-const reference as argument.
-      // Also, specifying template argument explicitly is needed because T could
-      // be a non-const reference (e.g. Matcher<Uncopyable&>).
-      ResultType result =
-          CallableTraits<Callable>::template Invoke<T>(callable_, obj);
-      return MatchPrintAndExplain(result, matcher_, listener);
-    }
-
-   private:
-    // Functors often define operator() as non-const method even though
-    // they are actually stateless. But we need to use them even when
-    // 'this' is a const pointer. It's the user's responsibility not to
-    // use stateful callables with ResultOf(), which doesn't guarantee
-    // how many times the callable will be invoked.
-    mutable CallableStorageType callable_;
-    const Matcher<ResultType> matcher_;
-  };  // class Impl
-
-  const CallableStorageType callable_;
-  const InnerMatcher matcher_;
-};
-
-// Implements a matcher that checks the size of an STL-style container.
-template <typename SizeMatcher>
-class SizeIsMatcher {
- public:
-  explicit SizeIsMatcher(const SizeMatcher& size_matcher)
-       : size_matcher_(size_matcher) {
-  }
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    return Matcher<Container>(new Impl<const Container&>(size_matcher_));
-  }
-
-  template <typename Container>
-  class Impl : public MatcherInterface<Container> {
-   public:
-    using SizeType = decltype(std::declval<Container>().size());
-    explicit Impl(const SizeMatcher& size_matcher)
-        : size_matcher_(MatcherCast<SizeType>(size_matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "size ";
-      size_matcher_.DescribeTo(os);
-    }
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "size ";
-      size_matcher_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(Container container,
-                         MatchResultListener* listener) const override {
-      SizeType size = container.size();
-      StringMatchResultListener size_listener;
-      const bool result = size_matcher_.MatchAndExplain(size, &size_listener);
-      *listener
-          << "whose size " << size << (result ? " matches" : " doesn't match");
-      PrintIfNotEmpty(size_listener.str(), listener->stream());
-      return result;
-    }
-
-   private:
-    const Matcher<SizeType> size_matcher_;
-  };
-
- private:
-  const SizeMatcher size_matcher_;
-};
-
-// Implements a matcher that checks the begin()..end() distance of an STL-style
-// container.
-template <typename DistanceMatcher>
-class BeginEndDistanceIsMatcher {
- public:
-  explicit BeginEndDistanceIsMatcher(const DistanceMatcher& distance_matcher)
-      : distance_matcher_(distance_matcher) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    return Matcher<Container>(new Impl<const Container&>(distance_matcher_));
-  }
-
-  template <typename Container>
-  class Impl : public MatcherInterface<Container> {
-   public:
-    typedef internal::StlContainerView<
-        GTEST_REMOVE_REFERENCE_AND_CONST_(Container)> ContainerView;
-    typedef typename std::iterator_traits<
-        typename ContainerView::type::const_iterator>::difference_type
-        DistanceType;
-    explicit Impl(const DistanceMatcher& distance_matcher)
-        : distance_matcher_(MatcherCast<DistanceType>(distance_matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "distance between begin() and end() ";
-      distance_matcher_.DescribeTo(os);
-    }
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "distance between begin() and end() ";
-      distance_matcher_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(Container container,
-                         MatchResultListener* listener) const override {
-      using std::begin;
-      using std::end;
-      DistanceType distance = std::distance(begin(container), end(container));
-      StringMatchResultListener distance_listener;
-      const bool result =
-          distance_matcher_.MatchAndExplain(distance, &distance_listener);
-      *listener << "whose distance between begin() and end() " << distance
-                << (result ? " matches" : " doesn't match");
-      PrintIfNotEmpty(distance_listener.str(), listener->stream());
-      return result;
-    }
-
-   private:
-    const Matcher<DistanceType> distance_matcher_;
-  };
-
- private:
-  const DistanceMatcher distance_matcher_;
-};
-
-// Implements an equality matcher for any STL-style container whose elements
-// support ==. This matcher is like Eq(), but its failure explanations provide
-// more detailed information that is useful when the container is used as a set.
-// The failure message reports elements that are in one of the operands but not
-// the other. The failure messages do not report duplicate or out-of-order
-// elements in the containers (which don't properly matter to sets, but can
-// occur if the containers are vectors or lists, for example).
-//
-// Uses the container's const_iterator, value_type, operator ==,
-// begin(), and end().
-template <typename Container>
-class ContainerEqMatcher {
- public:
-  typedef internal::StlContainerView<Container> View;
-  typedef typename View::type StlContainer;
-  typedef typename View::const_reference StlContainerReference;
-
-  static_assert(!std::is_const<Container>::value,
-                "Container type must not be const");
-  static_assert(!std::is_reference<Container>::value,
-                "Container type must not be a reference");
-
-  // We make a copy of expected in case the elements in it are modified
-  // after this matcher is created.
-  explicit ContainerEqMatcher(const Container& expected)
-      : expected_(View::Copy(expected)) {}
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << "equals ";
-    UniversalPrint(expected_, os);
-  }
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "does not equal ";
-    UniversalPrint(expected_, os);
-  }
-
-  template <typename LhsContainer>
-  bool MatchAndExplain(const LhsContainer& lhs,
-                       MatchResultListener* listener) const {
-    typedef internal::StlContainerView<
-        typename std::remove_const<LhsContainer>::type>
-        LhsView;
-    typedef typename LhsView::type LhsStlContainer;
-    StlContainerReference lhs_stl_container = LhsView::ConstReference(lhs);
-    if (lhs_stl_container == expected_)
-      return true;
-
-    ::std::ostream* const os = listener->stream();
-    if (os != nullptr) {
-      // Something is different. Check for extra values first.
-      bool printed_header = false;
-      for (typename LhsStlContainer::const_iterator it =
-               lhs_stl_container.begin();
-           it != lhs_stl_container.end(); ++it) {
-        if (internal::ArrayAwareFind(expected_.begin(), expected_.end(), *it) ==
-            expected_.end()) {
-          if (printed_header) {
-            *os << ", ";
-          } else {
-            *os << "which has these unexpected elements: ";
-            printed_header = true;
-          }
-          UniversalPrint(*it, os);
-        }
-      }
-
-      // Now check for missing values.
-      bool printed_header2 = false;
-      for (typename StlContainer::const_iterator it = expected_.begin();
-           it != expected_.end(); ++it) {
-        if (internal::ArrayAwareFind(
-                lhs_stl_container.begin(), lhs_stl_container.end(), *it) ==
-            lhs_stl_container.end()) {
-          if (printed_header2) {
-            *os << ", ";
-          } else {
-            *os << (printed_header ? ",\nand" : "which")
-                << " doesn't have these expected elements: ";
-            printed_header2 = true;
-          }
-          UniversalPrint(*it, os);
-        }
-      }
-    }
-
-    return false;
-  }
-
- private:
-  const StlContainer expected_;
-};
-
-// A comparator functor that uses the < operator to compare two values.
-struct LessComparator {
-  template <typename T, typename U>
-  bool operator()(const T& lhs, const U& rhs) const { return lhs < rhs; }
-};
-
-// Implements WhenSortedBy(comparator, container_matcher).
-template <typename Comparator, typename ContainerMatcher>
-class WhenSortedByMatcher {
- public:
-  WhenSortedByMatcher(const Comparator& comparator,
-                      const ContainerMatcher& matcher)
-      : comparator_(comparator), matcher_(matcher) {}
-
-  template <typename LhsContainer>
-  operator Matcher<LhsContainer>() const {
-    return MakeMatcher(new Impl<LhsContainer>(comparator_, matcher_));
-  }
-
-  template <typename LhsContainer>
-  class Impl : public MatcherInterface<LhsContainer> {
-   public:
-    typedef internal::StlContainerView<
-         GTEST_REMOVE_REFERENCE_AND_CONST_(LhsContainer)> LhsView;
-    typedef typename LhsView::type LhsStlContainer;
-    typedef typename LhsView::const_reference LhsStlContainerReference;
-    // Transforms std::pair<const Key, Value> into std::pair<Key, Value>
-    // so that we can match associative containers.
-    typedef typename RemoveConstFromKey<
-        typename LhsStlContainer::value_type>::type LhsValue;
-
-    Impl(const Comparator& comparator, const ContainerMatcher& matcher)
-        : comparator_(comparator), matcher_(matcher) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "(when sorted) ";
-      matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "(when sorted) ";
-      matcher_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(LhsContainer lhs,
-                         MatchResultListener* listener) const override {
-      LhsStlContainerReference lhs_stl_container = LhsView::ConstReference(lhs);
-      ::std::vector<LhsValue> sorted_container(lhs_stl_container.begin(),
-                                               lhs_stl_container.end());
-      ::std::sort(
-           sorted_container.begin(), sorted_container.end(), comparator_);
-
-      if (!listener->IsInterested()) {
-        // If the listener is not interested, we do not need to
-        // construct the inner explanation.
-        return matcher_.Matches(sorted_container);
-      }
-
-      *listener << "which is ";
-      UniversalPrint(sorted_container, listener->stream());
-      *listener << " when sorted";
-
-      StringMatchResultListener inner_listener;
-      const bool match = matcher_.MatchAndExplain(sorted_container,
-                                                  &inner_listener);
-      PrintIfNotEmpty(inner_listener.str(), listener->stream());
-      return match;
-    }
-
-   private:
-    const Comparator comparator_;
-    const Matcher<const ::std::vector<LhsValue>&> matcher_;
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(Impl);
-  };
-
- private:
-  const Comparator comparator_;
-  const ContainerMatcher matcher_;
-};
-
-// Implements Pointwise(tuple_matcher, rhs_container).  tuple_matcher
-// must be able to be safely cast to Matcher<std::tuple<const T1&, const
-// T2&> >, where T1 and T2 are the types of elements in the LHS
-// container and the RHS container respectively.
-template <typename TupleMatcher, typename RhsContainer>
-class PointwiseMatcher {
-  GTEST_COMPILE_ASSERT_(
-      !IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(RhsContainer)>::value,
-      use_UnorderedPointwise_with_hash_tables);
-
- public:
-  typedef internal::StlContainerView<RhsContainer> RhsView;
-  typedef typename RhsView::type RhsStlContainer;
-  typedef typename RhsStlContainer::value_type RhsValue;
-
-  static_assert(!std::is_const<RhsContainer>::value,
-                "RhsContainer type must not be const");
-  static_assert(!std::is_reference<RhsContainer>::value,
-                "RhsContainer type must not be a reference");
-
-  // Like ContainerEq, we make a copy of rhs in case the elements in
-  // it are modified after this matcher is created.
-  PointwiseMatcher(const TupleMatcher& tuple_matcher, const RhsContainer& rhs)
-      : tuple_matcher_(tuple_matcher), rhs_(RhsView::Copy(rhs)) {}
-
-  template <typename LhsContainer>
-  operator Matcher<LhsContainer>() const {
-    GTEST_COMPILE_ASSERT_(
-        !IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(LhsContainer)>::value,
-        use_UnorderedPointwise_with_hash_tables);
-
-    return Matcher<LhsContainer>(
-        new Impl<const LhsContainer&>(tuple_matcher_, rhs_));
-  }
-
-  template <typename LhsContainer>
-  class Impl : public MatcherInterface<LhsContainer> {
-   public:
-    typedef internal::StlContainerView<
-         GTEST_REMOVE_REFERENCE_AND_CONST_(LhsContainer)> LhsView;
-    typedef typename LhsView::type LhsStlContainer;
-    typedef typename LhsView::const_reference LhsStlContainerReference;
-    typedef typename LhsStlContainer::value_type LhsValue;
-    // We pass the LHS value and the RHS value to the inner matcher by
-    // reference, as they may be expensive to copy.  We must use tuple
-    // instead of pair here, as a pair cannot hold references (C++ 98,
-    // 20.2.2 [lib.pairs]).
-    typedef ::std::tuple<const LhsValue&, const RhsValue&> InnerMatcherArg;
-
-    Impl(const TupleMatcher& tuple_matcher, const RhsStlContainer& rhs)
-        // mono_tuple_matcher_ holds a monomorphic version of the tuple matcher.
-        : mono_tuple_matcher_(SafeMatcherCast<InnerMatcherArg>(tuple_matcher)),
-          rhs_(rhs) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "contains " << rhs_.size()
-          << " values, where each value and its corresponding value in ";
-      UniversalPrinter<RhsStlContainer>::Print(rhs_, os);
-      *os << " ";
-      mono_tuple_matcher_.DescribeTo(os);
-    }
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "doesn't contain exactly " << rhs_.size()
-          << " values, or contains a value x at some index i"
-          << " where x and the i-th value of ";
-      UniversalPrint(rhs_, os);
-      *os << " ";
-      mono_tuple_matcher_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(LhsContainer lhs,
-                         MatchResultListener* listener) const override {
-      LhsStlContainerReference lhs_stl_container = LhsView::ConstReference(lhs);
-      const size_t actual_size = lhs_stl_container.size();
-      if (actual_size != rhs_.size()) {
-        *listener << "which contains " << actual_size << " values";
-        return false;
-      }
-
-      typename LhsStlContainer::const_iterator left = lhs_stl_container.begin();
-      typename RhsStlContainer::const_iterator right = rhs_.begin();
-      for (size_t i = 0; i != actual_size; ++i, ++left, ++right) {
-        if (listener->IsInterested()) {
-          StringMatchResultListener inner_listener;
-          // Create InnerMatcherArg as a temporarily object to avoid it outlives
-          // *left and *right. Dereference or the conversion to `const T&` may
-          // return temp objects, e.g for vector<bool>.
-          if (!mono_tuple_matcher_.MatchAndExplain(
-                  InnerMatcherArg(ImplicitCast_<const LhsValue&>(*left),
-                                  ImplicitCast_<const RhsValue&>(*right)),
-                  &inner_listener)) {
-            *listener << "where the value pair (";
-            UniversalPrint(*left, listener->stream());
-            *listener << ", ";
-            UniversalPrint(*right, listener->stream());
-            *listener << ") at index #" << i << " don't match";
-            PrintIfNotEmpty(inner_listener.str(), listener->stream());
-            return false;
-          }
-        } else {
-          if (!mono_tuple_matcher_.Matches(
-                  InnerMatcherArg(ImplicitCast_<const LhsValue&>(*left),
-                                  ImplicitCast_<const RhsValue&>(*right))))
-            return false;
-        }
-      }
-
-      return true;
-    }
-
-   private:
-    const Matcher<InnerMatcherArg> mono_tuple_matcher_;
-    const RhsStlContainer rhs_;
-  };
-
- private:
-  const TupleMatcher tuple_matcher_;
-  const RhsStlContainer rhs_;
-};
-
-// Holds the logic common to ContainsMatcherImpl and EachMatcherImpl.
-template <typename Container>
-class QuantifierMatcherImpl : public MatcherInterface<Container> {
- public:
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
-  typedef StlContainerView<RawContainer> View;
-  typedef typename View::type StlContainer;
-  typedef typename View::const_reference StlContainerReference;
-  typedef typename StlContainer::value_type Element;
-
-  template <typename InnerMatcher>
-  explicit QuantifierMatcherImpl(InnerMatcher inner_matcher)
-      : inner_matcher_(
-           testing::SafeMatcherCast<const Element&>(inner_matcher)) {}
-
-  // Checks whether:
-  // * All elements in the container match, if all_elements_should_match.
-  // * Any element in the container matches, if !all_elements_should_match.
-  bool MatchAndExplainImpl(bool all_elements_should_match,
-                           Container container,
-                           MatchResultListener* listener) const {
-    StlContainerReference stl_container = View::ConstReference(container);
-    size_t i = 0;
-    for (typename StlContainer::const_iterator it = stl_container.begin();
-         it != stl_container.end(); ++it, ++i) {
-      StringMatchResultListener inner_listener;
-      const bool matches = inner_matcher_.MatchAndExplain(*it, &inner_listener);
-
-      if (matches != all_elements_should_match) {
-        *listener << "whose element #" << i
-                  << (matches ? " matches" : " doesn't match");
-        PrintIfNotEmpty(inner_listener.str(), listener->stream());
-        return !all_elements_should_match;
-      }
-    }
-    return all_elements_should_match;
-  }
-
- protected:
-  const Matcher<const Element&> inner_matcher_;
-};
-
-// Implements Contains(element_matcher) for the given argument type Container.
-// Symmetric to EachMatcherImpl.
-template <typename Container>
-class ContainsMatcherImpl : public QuantifierMatcherImpl<Container> {
- public:
-  template <typename InnerMatcher>
-  explicit ContainsMatcherImpl(InnerMatcher inner_matcher)
-      : QuantifierMatcherImpl<Container>(inner_matcher) {}
-
-  // Describes what this matcher does.
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "contains at least one element that ";
-    this->inner_matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "doesn't contain any element that ";
-    this->inner_matcher_.DescribeTo(os);
-  }
-
-  bool MatchAndExplain(Container container,
-                       MatchResultListener* listener) const override {
-    return this->MatchAndExplainImpl(false, container, listener);
-  }
-};
-
-// Implements Each(element_matcher) for the given argument type Container.
-// Symmetric to ContainsMatcherImpl.
-template <typename Container>
-class EachMatcherImpl : public QuantifierMatcherImpl<Container> {
- public:
-  template <typename InnerMatcher>
-  explicit EachMatcherImpl(InnerMatcher inner_matcher)
-      : QuantifierMatcherImpl<Container>(inner_matcher) {}
-
-  // Describes what this matcher does.
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "only contains elements that ";
-    this->inner_matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "contains some element that ";
-    this->inner_matcher_.DescribeNegationTo(os);
-  }
-
-  bool MatchAndExplain(Container container,
-                       MatchResultListener* listener) const override {
-    return this->MatchAndExplainImpl(true, container, listener);
-  }
-};
-
-// Implements polymorphic Contains(element_matcher).
-template <typename M>
-class ContainsMatcher {
- public:
-  explicit ContainsMatcher(M m) : inner_matcher_(m) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    return Matcher<Container>(
-        new ContainsMatcherImpl<const Container&>(inner_matcher_));
-  }
-
- private:
-  const M inner_matcher_;
-};
-
-// Implements polymorphic Each(element_matcher).
-template <typename M>
-class EachMatcher {
- public:
-  explicit EachMatcher(M m) : inner_matcher_(m) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    return Matcher<Container>(
-        new EachMatcherImpl<const Container&>(inner_matcher_));
-  }
-
- private:
-  const M inner_matcher_;
-};
-
-struct Rank1 {};
-struct Rank0 : Rank1 {};
-
-namespace pair_getters {
-using std::get;
-template <typename T>
-auto First(T& x, Rank1) -> decltype(get<0>(x)) {  // NOLINT
-  return get<0>(x);
-}
-template <typename T>
-auto First(T& x, Rank0) -> decltype((x.first)) {  // NOLINT
-  return x.first;
-}
-
-template <typename T>
-auto Second(T& x, Rank1) -> decltype(get<1>(x)) {  // NOLINT
-  return get<1>(x);
-}
-template <typename T>
-auto Second(T& x, Rank0) -> decltype((x.second)) {  // NOLINT
-  return x.second;
-}
-}  // namespace pair_getters
-
-// Implements Key(inner_matcher) for the given argument pair type.
-// Key(inner_matcher) matches an std::pair whose 'first' field matches
-// inner_matcher.  For example, Contains(Key(Ge(5))) can be used to match an
-// std::map that contains at least one element whose key is >= 5.
-template <typename PairType>
-class KeyMatcherImpl : public MatcherInterface<PairType> {
- public:
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(PairType) RawPairType;
-  typedef typename RawPairType::first_type KeyType;
-
-  template <typename InnerMatcher>
-  explicit KeyMatcherImpl(InnerMatcher inner_matcher)
-      : inner_matcher_(
-          testing::SafeMatcherCast<const KeyType&>(inner_matcher)) {
-  }
-
-  // Returns true if and only if 'key_value.first' (the key) matches the inner
-  // matcher.
-  bool MatchAndExplain(PairType key_value,
-                       MatchResultListener* listener) const override {
-    StringMatchResultListener inner_listener;
-    const bool match = inner_matcher_.MatchAndExplain(
-        pair_getters::First(key_value, Rank0()), &inner_listener);
-    const std::string explanation = inner_listener.str();
-    if (explanation != "") {
-      *listener << "whose first field is a value " << explanation;
-    }
-    return match;
-  }
-
-  // Describes what this matcher does.
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "has a key that ";
-    inner_matcher_.DescribeTo(os);
-  }
-
-  // Describes what the negation of this matcher does.
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "doesn't have a key that ";
-    inner_matcher_.DescribeTo(os);
-  }
-
- private:
-  const Matcher<const KeyType&> inner_matcher_;
-};
-
-// Implements polymorphic Key(matcher_for_key).
-template <typename M>
-class KeyMatcher {
- public:
-  explicit KeyMatcher(M m) : matcher_for_key_(m) {}
-
-  template <typename PairType>
-  operator Matcher<PairType>() const {
-    return Matcher<PairType>(
-        new KeyMatcherImpl<const PairType&>(matcher_for_key_));
-  }
-
- private:
-  const M matcher_for_key_;
-};
-
-// Implements polymorphic Address(matcher_for_address).
-template <typename InnerMatcher>
-class AddressMatcher {
- public:
-  explicit AddressMatcher(InnerMatcher m) : matcher_(m) {}
-
-  template <typename Type>
-  operator Matcher<Type>() const {  // NOLINT
-    return Matcher<Type>(new Impl<const Type&>(matcher_));
-  }
-
- private:
-  // The monomorphic implementation that works for a particular object type.
-  template <typename Type>
-  class Impl : public MatcherInterface<Type> {
-   public:
-    using Address = const GTEST_REMOVE_REFERENCE_AND_CONST_(Type) *;
-    explicit Impl(const InnerMatcher& matcher)
-        : matcher_(MatcherCast<Address>(matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "has address that ";
-      matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "does not have address that ";
-      matcher_.DescribeTo(os);
-    }
-
-    bool MatchAndExplain(Type object,
-                         MatchResultListener* listener) const override {
-      *listener << "which has address ";
-      Address address = std::addressof(object);
-      return MatchPrintAndExplain(address, matcher_, listener);
-    }
-
-   private:
-    const Matcher<Address> matcher_;
-  };
-  const InnerMatcher matcher_;
-};
-
-// Implements Pair(first_matcher, second_matcher) for the given argument pair
-// type with its two matchers. See Pair() function below.
-template <typename PairType>
-class PairMatcherImpl : public MatcherInterface<PairType> {
- public:
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(PairType) RawPairType;
-  typedef typename RawPairType::first_type FirstType;
-  typedef typename RawPairType::second_type SecondType;
-
-  template <typename FirstMatcher, typename SecondMatcher>
-  PairMatcherImpl(FirstMatcher first_matcher, SecondMatcher second_matcher)
-      : first_matcher_(
-            testing::SafeMatcherCast<const FirstType&>(first_matcher)),
-        second_matcher_(
-            testing::SafeMatcherCast<const SecondType&>(second_matcher)) {
-  }
-
-  // Describes what this matcher does.
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "has a first field that ";
-    first_matcher_.DescribeTo(os);
-    *os << ", and has a second field that ";
-    second_matcher_.DescribeTo(os);
-  }
-
-  // Describes what the negation of this matcher does.
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "has a first field that ";
-    first_matcher_.DescribeNegationTo(os);
-    *os << ", or has a second field that ";
-    second_matcher_.DescribeNegationTo(os);
-  }
-
-  // Returns true if and only if 'a_pair.first' matches first_matcher and
-  // 'a_pair.second' matches second_matcher.
-  bool MatchAndExplain(PairType a_pair,
-                       MatchResultListener* listener) const override {
-    if (!listener->IsInterested()) {
-      // If the listener is not interested, we don't need to construct the
-      // explanation.
-      return first_matcher_.Matches(pair_getters::First(a_pair, Rank0())) &&
-             second_matcher_.Matches(pair_getters::Second(a_pair, Rank0()));
-    }
-    StringMatchResultListener first_inner_listener;
-    if (!first_matcher_.MatchAndExplain(pair_getters::First(a_pair, Rank0()),
-                                        &first_inner_listener)) {
-      *listener << "whose first field does not match";
-      PrintIfNotEmpty(first_inner_listener.str(), listener->stream());
-      return false;
-    }
-    StringMatchResultListener second_inner_listener;
-    if (!second_matcher_.MatchAndExplain(pair_getters::Second(a_pair, Rank0()),
-                                         &second_inner_listener)) {
-      *listener << "whose second field does not match";
-      PrintIfNotEmpty(second_inner_listener.str(), listener->stream());
-      return false;
-    }
-    ExplainSuccess(first_inner_listener.str(), second_inner_listener.str(),
-                   listener);
-    return true;
-  }
-
- private:
-  void ExplainSuccess(const std::string& first_explanation,
-                      const std::string& second_explanation,
-                      MatchResultListener* listener) const {
-    *listener << "whose both fields match";
-    if (first_explanation != "") {
-      *listener << ", where the first field is a value " << first_explanation;
-    }
-    if (second_explanation != "") {
-      *listener << ", ";
-      if (first_explanation != "") {
-        *listener << "and ";
-      } else {
-        *listener << "where ";
-      }
-      *listener << "the second field is a value " << second_explanation;
-    }
-  }
-
-  const Matcher<const FirstType&> first_matcher_;
-  const Matcher<const SecondType&> second_matcher_;
-};
-
-// Implements polymorphic Pair(first_matcher, second_matcher).
-template <typename FirstMatcher, typename SecondMatcher>
-class PairMatcher {
- public:
-  PairMatcher(FirstMatcher first_matcher, SecondMatcher second_matcher)
-      : first_matcher_(first_matcher), second_matcher_(second_matcher) {}
-
-  template <typename PairType>
-  operator Matcher<PairType> () const {
-    return Matcher<PairType>(
-        new PairMatcherImpl<const PairType&>(first_matcher_, second_matcher_));
-  }
-
- private:
-  const FirstMatcher first_matcher_;
-  const SecondMatcher second_matcher_;
-};
-
-template <typename T, size_t... I>
-auto UnpackStructImpl(const T& t, IndexSequence<I...>, int)
-    -> decltype(std::tie(get<I>(t)...)) {
-  static_assert(std::tuple_size<T>::value == sizeof...(I),
-                "Number of arguments doesn't match the number of fields.");
-  return std::tie(get<I>(t)...);
-}
-
-#if defined(__cpp_structured_bindings) && __cpp_structured_bindings >= 201606
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<1>, char) {
-  const auto& [a] = t;
-  return std::tie(a);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<2>, char) {
-  const auto& [a, b] = t;
-  return std::tie(a, b);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<3>, char) {
-  const auto& [a, b, c] = t;
-  return std::tie(a, b, c);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<4>, char) {
-  const auto& [a, b, c, d] = t;
-  return std::tie(a, b, c, d);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<5>, char) {
-  const auto& [a, b, c, d, e] = t;
-  return std::tie(a, b, c, d, e);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<6>, char) {
-  const auto& [a, b, c, d, e, f] = t;
-  return std::tie(a, b, c, d, e, f);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<7>, char) {
-  const auto& [a, b, c, d, e, f, g] = t;
-  return std::tie(a, b, c, d, e, f, g);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<8>, char) {
-  const auto& [a, b, c, d, e, f, g, h] = t;
-  return std::tie(a, b, c, d, e, f, g, h);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<9>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<10>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<11>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j, k] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j, k);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<12>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j, k, l] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<13>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j, k, l, m] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l, m);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<14>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j, k, l, m, n] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l, m, n);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<15>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j, k, l, m, n, o] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o);
-}
-template <typename T>
-auto UnpackStructImpl(const T& t, MakeIndexSequence<16>, char) {
-  const auto& [a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p] = t;
-  return std::tie(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p);
-}
-#endif  // defined(__cpp_structured_bindings)
-
-template <size_t I, typename T>
-auto UnpackStruct(const T& t)
-    -> decltype((UnpackStructImpl)(t, MakeIndexSequence<I>{}, 0)) {
-  return (UnpackStructImpl)(t, MakeIndexSequence<I>{}, 0);
-}
-
-// Helper function to do comma folding in C++11.
-// The array ensures left-to-right order of evaluation.
-// Usage: VariadicExpand({expr...});
-template <typename T, size_t N>
-void VariadicExpand(const T (&)[N]) {}
-
-template <typename Struct, typename StructSize>
-class FieldsAreMatcherImpl;
-
-template <typename Struct, size_t... I>
-class FieldsAreMatcherImpl<Struct, IndexSequence<I...>>
-    : public MatcherInterface<Struct> {
-  using UnpackedType =
-      decltype(UnpackStruct<sizeof...(I)>(std::declval<const Struct&>()));
-  using MatchersType = std::tuple<
-      Matcher<const typename std::tuple_element<I, UnpackedType>::type&>...>;
-
- public:
-  template <typename Inner>
-  explicit FieldsAreMatcherImpl(const Inner& matchers)
-      : matchers_(testing::SafeMatcherCast<
-                  const typename std::tuple_element<I, UnpackedType>::type&>(
-            std::get<I>(matchers))...) {}
-
-  void DescribeTo(::std::ostream* os) const override {
-    const char* separator = "";
-    VariadicExpand(
-        {(*os << separator << "has field #" << I << " that ",
-          std::get<I>(matchers_).DescribeTo(os), separator = ", and ")...});
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    const char* separator = "";
-    VariadicExpand({(*os << separator << "has field #" << I << " that ",
-                     std::get<I>(matchers_).DescribeNegationTo(os),
-                     separator = ", or ")...});
-  }
-
-  bool MatchAndExplain(Struct t, MatchResultListener* listener) const override {
-    return MatchInternal((UnpackStruct<sizeof...(I)>)(t), listener);
-  }
-
- private:
-  bool MatchInternal(UnpackedType tuple, MatchResultListener* listener) const {
-    if (!listener->IsInterested()) {
-      // If the listener is not interested, we don't need to construct the
-      // explanation.
-      bool good = true;
-      VariadicExpand({good = good && std::get<I>(matchers_).Matches(
-                                         std::get<I>(tuple))...});
-      return good;
-    }
-
-    size_t failed_pos = ~size_t{};
-
-    std::vector<StringMatchResultListener> inner_listener(sizeof...(I));
-
-    VariadicExpand(
-        {failed_pos == ~size_t{} && !std::get<I>(matchers_).MatchAndExplain(
-                                        std::get<I>(tuple), &inner_listener[I])
-             ? failed_pos = I
-             : 0 ...});
-    if (failed_pos != ~size_t{}) {
-      *listener << "whose field #" << failed_pos << " does not match";
-      PrintIfNotEmpty(inner_listener[failed_pos].str(), listener->stream());
-      return false;
-    }
-
-    *listener << "whose all elements match";
-    const char* separator = ", where";
-    for (size_t index = 0; index < sizeof...(I); ++index) {
-      const std::string str = inner_listener[index].str();
-      if (!str.empty()) {
-        *listener << separator << " field #" << index << " is a value " << str;
-        separator = ", and";
-      }
-    }
-
-    return true;
-  }
-
-  MatchersType matchers_;
-};
-
-template <typename... Inner>
-class FieldsAreMatcher {
- public:
-  explicit FieldsAreMatcher(Inner... inner) : matchers_(std::move(inner)...) {}
-
-  template <typename Struct>
-  operator Matcher<Struct>() const {  // NOLINT
-    return Matcher<Struct>(
-        new FieldsAreMatcherImpl<const Struct&, IndexSequenceFor<Inner...>>(
-            matchers_));
-  }
-
- private:
-  std::tuple<Inner...> matchers_;
-};
-
-// Implements ElementsAre() and ElementsAreArray().
-template <typename Container>
-class ElementsAreMatcherImpl : public MatcherInterface<Container> {
- public:
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
-  typedef internal::StlContainerView<RawContainer> View;
-  typedef typename View::type StlContainer;
-  typedef typename View::const_reference StlContainerReference;
-  typedef typename StlContainer::value_type Element;
-
-  // Constructs the matcher from a sequence of element values or
-  // element matchers.
-  template <typename InputIter>
-  ElementsAreMatcherImpl(InputIter first, InputIter last) {
-    while (first != last) {
-      matchers_.push_back(MatcherCast<const Element&>(*first++));
-    }
-  }
-
-  // Describes what this matcher does.
-  void DescribeTo(::std::ostream* os) const override {
-    if (count() == 0) {
-      *os << "is empty";
-    } else if (count() == 1) {
-      *os << "has 1 element that ";
-      matchers_[0].DescribeTo(os);
-    } else {
-      *os << "has " << Elements(count()) << " where\n";
-      for (size_t i = 0; i != count(); ++i) {
-        *os << "element #" << i << " ";
-        matchers_[i].DescribeTo(os);
-        if (i + 1 < count()) {
-          *os << ",\n";
-        }
-      }
-    }
-  }
-
-  // Describes what the negation of this matcher does.
-  void DescribeNegationTo(::std::ostream* os) const override {
-    if (count() == 0) {
-      *os << "isn't empty";
-      return;
-    }
-
-    *os << "doesn't have " << Elements(count()) << ", or\n";
-    for (size_t i = 0; i != count(); ++i) {
-      *os << "element #" << i << " ";
-      matchers_[i].DescribeNegationTo(os);
-      if (i + 1 < count()) {
-        *os << ", or\n";
-      }
-    }
-  }
-
-  bool MatchAndExplain(Container container,
-                       MatchResultListener* listener) const override {
-    // To work with stream-like "containers", we must only walk
-    // through the elements in one pass.
-
-    const bool listener_interested = listener->IsInterested();
-
-    // explanations[i] is the explanation of the element at index i.
-    ::std::vector<std::string> explanations(count());
-    StlContainerReference stl_container = View::ConstReference(container);
-    typename StlContainer::const_iterator it = stl_container.begin();
-    size_t exam_pos = 0;
-    bool mismatch_found = false;  // Have we found a mismatched element yet?
-
-    // Go through the elements and matchers in pairs, until we reach
-    // the end of either the elements or the matchers, or until we find a
-    // mismatch.
-    for (; it != stl_container.end() && exam_pos != count(); ++it, ++exam_pos) {
-      bool match;  // Does the current element match the current matcher?
-      if (listener_interested) {
-        StringMatchResultListener s;
-        match = matchers_[exam_pos].MatchAndExplain(*it, &s);
-        explanations[exam_pos] = s.str();
-      } else {
-        match = matchers_[exam_pos].Matches(*it);
-      }
-
-      if (!match) {
-        mismatch_found = true;
-        break;
-      }
-    }
-    // If mismatch_found is true, 'exam_pos' is the index of the mismatch.
-
-    // Find how many elements the actual container has.  We avoid
-    // calling size() s.t. this code works for stream-like "containers"
-    // that don't define size().
-    size_t actual_count = exam_pos;
-    for (; it != stl_container.end(); ++it) {
-      ++actual_count;
-    }
-
-    if (actual_count != count()) {
-      // The element count doesn't match.  If the container is empty,
-      // there's no need to explain anything as Google Mock already
-      // prints the empty container.  Otherwise we just need to show
-      // how many elements there actually are.
-      if (listener_interested && (actual_count != 0)) {
-        *listener << "which has " << Elements(actual_count);
-      }
-      return false;
-    }
-
-    if (mismatch_found) {
-      // The element count matches, but the exam_pos-th element doesn't match.
-      if (listener_interested) {
-        *listener << "whose element #" << exam_pos << " doesn't match";
-        PrintIfNotEmpty(explanations[exam_pos], listener->stream());
-      }
-      return false;
-    }
-
-    // Every element matches its expectation.  We need to explain why
-    // (the obvious ones can be skipped).
-    if (listener_interested) {
-      bool reason_printed = false;
-      for (size_t i = 0; i != count(); ++i) {
-        const std::string& s = explanations[i];
-        if (!s.empty()) {
-          if (reason_printed) {
-            *listener << ",\nand ";
-          }
-          *listener << "whose element #" << i << " matches, " << s;
-          reason_printed = true;
-        }
-      }
-    }
-    return true;
-  }
-
- private:
-  static Message Elements(size_t count) {
-    return Message() << count << (count == 1 ? " element" : " elements");
-  }
-
-  size_t count() const { return matchers_.size(); }
-
-  ::std::vector<Matcher<const Element&> > matchers_;
-};
-
-// Connectivity matrix of (elements X matchers), in element-major order.
-// Initially, there are no edges.
-// Use NextGraph() to iterate over all possible edge configurations.
-// Use Randomize() to generate a random edge configuration.
-class GTEST_API_ MatchMatrix {
- public:
-  MatchMatrix(size_t num_elements, size_t num_matchers)
-      : num_elements_(num_elements),
-        num_matchers_(num_matchers),
-        matched_(num_elements_* num_matchers_, 0) {
-  }
-
-  size_t LhsSize() const { return num_elements_; }
-  size_t RhsSize() const { return num_matchers_; }
-  bool HasEdge(size_t ilhs, size_t irhs) const {
-    return matched_[SpaceIndex(ilhs, irhs)] == 1;
-  }
-  void SetEdge(size_t ilhs, size_t irhs, bool b) {
-    matched_[SpaceIndex(ilhs, irhs)] = b ? 1 : 0;
-  }
-
-  // Treating the connectivity matrix as a (LhsSize()*RhsSize())-bit number,
-  // adds 1 to that number; returns false if incrementing the graph left it
-  // empty.
-  bool NextGraph();
-
-  void Randomize();
-
-  std::string DebugString() const;
-
- private:
-  size_t SpaceIndex(size_t ilhs, size_t irhs) const {
-    return ilhs * num_matchers_ + irhs;
-  }
-
-  size_t num_elements_;
-  size_t num_matchers_;
-
-  // Each element is a char interpreted as bool. They are stored as a
-  // flattened array in lhs-major order, use 'SpaceIndex()' to translate
-  // a (ilhs, irhs) matrix coordinate into an offset.
-  ::std::vector<char> matched_;
-};
-
-typedef ::std::pair<size_t, size_t> ElementMatcherPair;
-typedef ::std::vector<ElementMatcherPair> ElementMatcherPairs;
-
-// Returns a maximum bipartite matching for the specified graph 'g'.
-// The matching is represented as a vector of {element, matcher} pairs.
-GTEST_API_ ElementMatcherPairs
-FindMaxBipartiteMatching(const MatchMatrix& g);
-
-struct UnorderedMatcherRequire {
-  enum Flags {
-    Superset = 1 << 0,
-    Subset = 1 << 1,
-    ExactMatch = Superset | Subset,
-  };
-};
-
-// Untyped base class for implementing UnorderedElementsAre.  By
-// putting logic that's not specific to the element type here, we
-// reduce binary bloat and increase compilation speed.
-class GTEST_API_ UnorderedElementsAreMatcherImplBase {
- protected:
-  explicit UnorderedElementsAreMatcherImplBase(
-      UnorderedMatcherRequire::Flags matcher_flags)
-      : match_flags_(matcher_flags) {}
-
-  // A vector of matcher describers, one for each element matcher.
-  // Does not own the describers (and thus can be used only when the
-  // element matchers are alive).
-  typedef ::std::vector<const MatcherDescriberInterface*> MatcherDescriberVec;
-
-  // Describes this UnorderedElementsAre matcher.
-  void DescribeToImpl(::std::ostream* os) const;
-
-  // Describes the negation of this UnorderedElementsAre matcher.
-  void DescribeNegationToImpl(::std::ostream* os) const;
-
-  bool VerifyMatchMatrix(const ::std::vector<std::string>& element_printouts,
-                         const MatchMatrix& matrix,
-                         MatchResultListener* listener) const;
-
-  bool FindPairing(const MatchMatrix& matrix,
-                   MatchResultListener* listener) const;
-
-  MatcherDescriberVec& matcher_describers() {
-    return matcher_describers_;
-  }
-
-  static Message Elements(size_t n) {
-    return Message() << n << " element" << (n == 1 ? "" : "s");
-  }
-
-  UnorderedMatcherRequire::Flags match_flags() const { return match_flags_; }
-
- private:
-  UnorderedMatcherRequire::Flags match_flags_;
-  MatcherDescriberVec matcher_describers_;
-};
-
-// Implements UnorderedElementsAre, UnorderedElementsAreArray, IsSubsetOf, and
-// IsSupersetOf.
-template <typename Container>
-class UnorderedElementsAreMatcherImpl
-    : public MatcherInterface<Container>,
-      public UnorderedElementsAreMatcherImplBase {
- public:
-  typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
-  typedef internal::StlContainerView<RawContainer> View;
-  typedef typename View::type StlContainer;
-  typedef typename View::const_reference StlContainerReference;
-  typedef typename StlContainer::const_iterator StlContainerConstIterator;
-  typedef typename StlContainer::value_type Element;
-
-  template <typename InputIter>
-  UnorderedElementsAreMatcherImpl(UnorderedMatcherRequire::Flags matcher_flags,
-                                  InputIter first, InputIter last)
-      : UnorderedElementsAreMatcherImplBase(matcher_flags) {
-    for (; first != last; ++first) {
-      matchers_.push_back(MatcherCast<const Element&>(*first));
-    }
-    for (const auto& m : matchers_) {
-      matcher_describers().push_back(m.GetDescriber());
-    }
-  }
-
-  // Describes what this matcher does.
-  void DescribeTo(::std::ostream* os) const override {
-    return UnorderedElementsAreMatcherImplBase::DescribeToImpl(os);
-  }
-
-  // Describes what the negation of this matcher does.
-  void DescribeNegationTo(::std::ostream* os) const override {
-    return UnorderedElementsAreMatcherImplBase::DescribeNegationToImpl(os);
-  }
-
-  bool MatchAndExplain(Container container,
-                       MatchResultListener* listener) const override {
-    StlContainerReference stl_container = View::ConstReference(container);
-    ::std::vector<std::string> element_printouts;
-    MatchMatrix matrix =
-        AnalyzeElements(stl_container.begin(), stl_container.end(),
-                        &element_printouts, listener);
-
-    if (matrix.LhsSize() == 0 && matrix.RhsSize() == 0) {
-      return true;
-    }
-
-    if (match_flags() == UnorderedMatcherRequire::ExactMatch) {
-      if (matrix.LhsSize() != matrix.RhsSize()) {
-        // The element count doesn't match.  If the container is empty,
-        // there's no need to explain anything as Google Mock already
-        // prints the empty container. Otherwise we just need to show
-        // how many elements there actually are.
-        if (matrix.LhsSize() != 0 && listener->IsInterested()) {
-          *listener << "which has " << Elements(matrix.LhsSize());
-        }
-        return false;
-      }
-    }
-
-    return VerifyMatchMatrix(element_printouts, matrix, listener) &&
-           FindPairing(matrix, listener);
-  }
-
- private:
-  template <typename ElementIter>
-  MatchMatrix AnalyzeElements(ElementIter elem_first, ElementIter elem_last,
-                              ::std::vector<std::string>* element_printouts,
-                              MatchResultListener* listener) const {
-    element_printouts->clear();
-    ::std::vector<char> did_match;
-    size_t num_elements = 0;
-    DummyMatchResultListener dummy;
-    for (; elem_first != elem_last; ++num_elements, ++elem_first) {
-      if (listener->IsInterested()) {
-        element_printouts->push_back(PrintToString(*elem_first));
-      }
-      for (size_t irhs = 0; irhs != matchers_.size(); ++irhs) {
-        did_match.push_back(
-            matchers_[irhs].MatchAndExplain(*elem_first, &dummy));
-      }
-    }
-
-    MatchMatrix matrix(num_elements, matchers_.size());
-    ::std::vector<char>::const_iterator did_match_iter = did_match.begin();
-    for (size_t ilhs = 0; ilhs != num_elements; ++ilhs) {
-      for (size_t irhs = 0; irhs != matchers_.size(); ++irhs) {
-        matrix.SetEdge(ilhs, irhs, *did_match_iter++ != 0);
-      }
-    }
-    return matrix;
-  }
-
-  ::std::vector<Matcher<const Element&> > matchers_;
-};
-
-// Functor for use in TransformTuple.
-// Performs MatcherCast<Target> on an input argument of any type.
-template <typename Target>
-struct CastAndAppendTransform {
-  template <typename Arg>
-  Matcher<Target> operator()(const Arg& a) const {
-    return MatcherCast<Target>(a);
-  }
-};
-
-// Implements UnorderedElementsAre.
-template <typename MatcherTuple>
-class UnorderedElementsAreMatcher {
- public:
-  explicit UnorderedElementsAreMatcher(const MatcherTuple& args)
-      : matchers_(args) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
-    typedef typename internal::StlContainerView<RawContainer>::type View;
-    typedef typename View::value_type Element;
-    typedef ::std::vector<Matcher<const Element&> > MatcherVec;
-    MatcherVec matchers;
-    matchers.reserve(::std::tuple_size<MatcherTuple>::value);
-    TransformTupleValues(CastAndAppendTransform<const Element&>(), matchers_,
-                         ::std::back_inserter(matchers));
-    return Matcher<Container>(
-        new UnorderedElementsAreMatcherImpl<const Container&>(
-            UnorderedMatcherRequire::ExactMatch, matchers.begin(),
-            matchers.end()));
-  }
-
- private:
-  const MatcherTuple matchers_;
-};
-
-// Implements ElementsAre.
-template <typename MatcherTuple>
-class ElementsAreMatcher {
- public:
-  explicit ElementsAreMatcher(const MatcherTuple& args) : matchers_(args) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    GTEST_COMPILE_ASSERT_(
-        !IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(Container)>::value ||
-            ::std::tuple_size<MatcherTuple>::value < 2,
-        use_UnorderedElementsAre_with_hash_tables);
-
-    typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Container) RawContainer;
-    typedef typename internal::StlContainerView<RawContainer>::type View;
-    typedef typename View::value_type Element;
-    typedef ::std::vector<Matcher<const Element&> > MatcherVec;
-    MatcherVec matchers;
-    matchers.reserve(::std::tuple_size<MatcherTuple>::value);
-    TransformTupleValues(CastAndAppendTransform<const Element&>(), matchers_,
-                         ::std::back_inserter(matchers));
-    return Matcher<Container>(new ElementsAreMatcherImpl<const Container&>(
-        matchers.begin(), matchers.end()));
-  }
-
- private:
-  const MatcherTuple matchers_;
-};
-
-// Implements UnorderedElementsAreArray(), IsSubsetOf(), and IsSupersetOf().
-template <typename T>
-class UnorderedElementsAreArrayMatcher {
- public:
-  template <typename Iter>
-  UnorderedElementsAreArrayMatcher(UnorderedMatcherRequire::Flags match_flags,
-                                   Iter first, Iter last)
-      : match_flags_(match_flags), matchers_(first, last) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    return Matcher<Container>(
-        new UnorderedElementsAreMatcherImpl<const Container&>(
-            match_flags_, matchers_.begin(), matchers_.end()));
-  }
-
- private:
-  UnorderedMatcherRequire::Flags match_flags_;
-  ::std::vector<T> matchers_;
-};
-
-// Implements ElementsAreArray().
-template <typename T>
-class ElementsAreArrayMatcher {
- public:
-  template <typename Iter>
-  ElementsAreArrayMatcher(Iter first, Iter last) : matchers_(first, last) {}
-
-  template <typename Container>
-  operator Matcher<Container>() const {
-    GTEST_COMPILE_ASSERT_(
-        !IsHashTable<GTEST_REMOVE_REFERENCE_AND_CONST_(Container)>::value,
-        use_UnorderedElementsAreArray_with_hash_tables);
-
-    return Matcher<Container>(new ElementsAreMatcherImpl<const Container&>(
-        matchers_.begin(), matchers_.end()));
-  }
-
- private:
-  const ::std::vector<T> matchers_;
-};
-
-// Given a 2-tuple matcher tm of type Tuple2Matcher and a value second
-// of type Second, BoundSecondMatcher<Tuple2Matcher, Second>(tm,
-// second) is a polymorphic matcher that matches a value x if and only if
-// tm matches tuple (x, second).  Useful for implementing
-// UnorderedPointwise() in terms of UnorderedElementsAreArray().
-//
-// BoundSecondMatcher is copyable and assignable, as we need to put
-// instances of this class in a vector when implementing
-// UnorderedPointwise().
-template <typename Tuple2Matcher, typename Second>
-class BoundSecondMatcher {
- public:
-  BoundSecondMatcher(const Tuple2Matcher& tm, const Second& second)
-      : tuple2_matcher_(tm), second_value_(second) {}
-
-  BoundSecondMatcher(const BoundSecondMatcher& other) = default;
-
-  template <typename T>
-  operator Matcher<T>() const {
-    return MakeMatcher(new Impl<T>(tuple2_matcher_, second_value_));
-  }
-
-  // We have to define this for UnorderedPointwise() to compile in
-  // C++98 mode, as it puts BoundSecondMatcher instances in a vector,
-  // which requires the elements to be assignable in C++98.  The
-  // compiler cannot generate the operator= for us, as Tuple2Matcher
-  // and Second may not be assignable.
-  //
-  // However, this should never be called, so the implementation just
-  // need to assert.
-  void operator=(const BoundSecondMatcher& /*rhs*/) {
-    GTEST_LOG_(FATAL) << "BoundSecondMatcher should never be assigned.";
-  }
-
- private:
-  template <typename T>
-  class Impl : public MatcherInterface<T> {
-   public:
-    typedef ::std::tuple<T, Second> ArgTuple;
-
-    Impl(const Tuple2Matcher& tm, const Second& second)
-        : mono_tuple2_matcher_(SafeMatcherCast<const ArgTuple&>(tm)),
-          second_value_(second) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "and ";
-      UniversalPrint(second_value_, os);
-      *os << " ";
-      mono_tuple2_matcher_.DescribeTo(os);
-    }
-
-    bool MatchAndExplain(T x, MatchResultListener* listener) const override {
-      return mono_tuple2_matcher_.MatchAndExplain(ArgTuple(x, second_value_),
-                                                  listener);
-    }
-
-   private:
-    const Matcher<const ArgTuple&> mono_tuple2_matcher_;
-    const Second second_value_;
-  };
-
-  const Tuple2Matcher tuple2_matcher_;
-  const Second second_value_;
-};
-
-// Given a 2-tuple matcher tm and a value second,
-// MatcherBindSecond(tm, second) returns a matcher that matches a
-// value x if and only if tm matches tuple (x, second).  Useful for
-// implementing UnorderedPointwise() in terms of UnorderedElementsAreArray().
-template <typename Tuple2Matcher, typename Second>
-BoundSecondMatcher<Tuple2Matcher, Second> MatcherBindSecond(
-    const Tuple2Matcher& tm, const Second& second) {
-  return BoundSecondMatcher<Tuple2Matcher, Second>(tm, second);
-}
-
-// Returns the description for a matcher defined using the MATCHER*()
-// macro where the user-supplied description string is "", if
-// 'negation' is false; otherwise returns the description of the
-// negation of the matcher.  'param_values' contains a list of strings
-// that are the print-out of the matcher's parameters.
-GTEST_API_ std::string FormatMatcherDescription(bool negation,
-                                                const char* matcher_name,
-                                                const Strings& param_values);
-
-// Implements a matcher that checks the value of a optional<> type variable.
-template <typename ValueMatcher>
-class OptionalMatcher {
- public:
-  explicit OptionalMatcher(const ValueMatcher& value_matcher)
-      : value_matcher_(value_matcher) {}
-
-  template <typename Optional>
-  operator Matcher<Optional>() const {
-    return Matcher<Optional>(new Impl<const Optional&>(value_matcher_));
-  }
-
-  template <typename Optional>
-  class Impl : public MatcherInterface<Optional> {
-   public:
-    typedef GTEST_REMOVE_REFERENCE_AND_CONST_(Optional) OptionalView;
-    typedef typename OptionalView::value_type ValueType;
-    explicit Impl(const ValueMatcher& value_matcher)
-        : value_matcher_(MatcherCast<ValueType>(value_matcher)) {}
-
-    void DescribeTo(::std::ostream* os) const override {
-      *os << "value ";
-      value_matcher_.DescribeTo(os);
-    }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << "value ";
-      value_matcher_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(Optional optional,
-                         MatchResultListener* listener) const override {
-      if (!optional) {
-        *listener << "which is not engaged";
-        return false;
-      }
-      const ValueType& value = *optional;
-      StringMatchResultListener value_listener;
-      const bool match = value_matcher_.MatchAndExplain(value, &value_listener);
-      *listener << "whose value " << PrintToString(value)
-                << (match ? " matches" : " doesn't match");
-      PrintIfNotEmpty(value_listener.str(), listener->stream());
-      return match;
-    }
-
-   private:
-    const Matcher<ValueType> value_matcher_;
-  };
-
- private:
-  const ValueMatcher value_matcher_;
-};
-
-namespace variant_matcher {
-// Overloads to allow VariantMatcher to do proper ADL lookup.
-template <typename T>
-void holds_alternative() {}
-template <typename T>
-void get() {}
-
-// Implements a matcher that checks the value of a variant<> type variable.
-template <typename T>
-class VariantMatcher {
- public:
-  explicit VariantMatcher(::testing::Matcher<const T&> matcher)
-      : matcher_(std::move(matcher)) {}
-
-  template <typename Variant>
-  bool MatchAndExplain(const Variant& value,
-                       ::testing::MatchResultListener* listener) const {
-    using std::get;
-    if (!listener->IsInterested()) {
-      return holds_alternative<T>(value) && matcher_.Matches(get<T>(value));
-    }
-
-    if (!holds_alternative<T>(value)) {
-      *listener << "whose value is not of type '" << GetTypeName() << "'";
-      return false;
-    }
-
-    const T& elem = get<T>(value);
-    StringMatchResultListener elem_listener;
-    const bool match = matcher_.MatchAndExplain(elem, &elem_listener);
-    *listener << "whose value " << PrintToString(elem)
-              << (match ? " matches" : " doesn't match");
-    PrintIfNotEmpty(elem_listener.str(), listener->stream());
-    return match;
-  }
-
-  void DescribeTo(std::ostream* os) const {
-    *os << "is a variant<> with value of type '" << GetTypeName()
-        << "' and the value ";
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(std::ostream* os) const {
-    *os << "is a variant<> with value of type other than '" << GetTypeName()
-        << "' or the value ";
-    matcher_.DescribeNegationTo(os);
-  }
-
- private:
-  static std::string GetTypeName() {
-#if GTEST_HAS_RTTI
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(
-        return internal::GetTypeName<T>());
-#endif
-    return "the element type";
-  }
-
-  const ::testing::Matcher<const T&> matcher_;
-};
-
-}  // namespace variant_matcher
-
-namespace any_cast_matcher {
-
-// Overloads to allow AnyCastMatcher to do proper ADL lookup.
-template <typename T>
-void any_cast() {}
-
-// Implements a matcher that any_casts the value.
-template <typename T>
-class AnyCastMatcher {
- public:
-  explicit AnyCastMatcher(const ::testing::Matcher<const T&>& matcher)
-      : matcher_(matcher) {}
-
-  template <typename AnyType>
-  bool MatchAndExplain(const AnyType& value,
-                       ::testing::MatchResultListener* listener) const {
-    if (!listener->IsInterested()) {
-      const T* ptr = any_cast<T>(&value);
-      return ptr != nullptr && matcher_.Matches(*ptr);
-    }
-
-    const T* elem = any_cast<T>(&value);
-    if (elem == nullptr) {
-      *listener << "whose value is not of type '" << GetTypeName() << "'";
-      return false;
-    }
-
-    StringMatchResultListener elem_listener;
-    const bool match = matcher_.MatchAndExplain(*elem, &elem_listener);
-    *listener << "whose value " << PrintToString(*elem)
-              << (match ? " matches" : " doesn't match");
-    PrintIfNotEmpty(elem_listener.str(), listener->stream());
-    return match;
-  }
-
-  void DescribeTo(std::ostream* os) const {
-    *os << "is an 'any' type with value of type '" << GetTypeName()
-        << "' and the value ";
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(std::ostream* os) const {
-    *os << "is an 'any' type with value of type other than '" << GetTypeName()
-        << "' or the value ";
-    matcher_.DescribeNegationTo(os);
-  }
-
- private:
-  static std::string GetTypeName() {
-#if GTEST_HAS_RTTI
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(
-        return internal::GetTypeName<T>());
-#endif
-    return "the element type";
-  }
-
-  const ::testing::Matcher<const T&> matcher_;
-};
-
-}  // namespace any_cast_matcher
-
-// Implements the Args() matcher.
-template <class ArgsTuple, size_t... k>
-class ArgsMatcherImpl : public MatcherInterface<ArgsTuple> {
- public:
-  using RawArgsTuple = typename std::decay<ArgsTuple>::type;
-  using SelectedArgs =
-      std::tuple<typename std::tuple_element<k, RawArgsTuple>::type...>;
-  using MonomorphicInnerMatcher = Matcher<const SelectedArgs&>;
-
-  template <typename InnerMatcher>
-  explicit ArgsMatcherImpl(const InnerMatcher& inner_matcher)
-      : inner_matcher_(SafeMatcherCast<const SelectedArgs&>(inner_matcher)) {}
-
-  bool MatchAndExplain(ArgsTuple args,
-                       MatchResultListener* listener) const override {
-    // Workaround spurious C4100 on MSVC<=15.7 when k is empty.
-    (void)args;
-    const SelectedArgs& selected_args =
-        std::forward_as_tuple(std::get<k>(args)...);
-    if (!listener->IsInterested()) return inner_matcher_.Matches(selected_args);
-
-    PrintIndices(listener->stream());
-    *listener << "are " << PrintToString(selected_args);
-
-    StringMatchResultListener inner_listener;
-    const bool match =
-        inner_matcher_.MatchAndExplain(selected_args, &inner_listener);
-    PrintIfNotEmpty(inner_listener.str(), listener->stream());
-    return match;
-  }
-
-  void DescribeTo(::std::ostream* os) const override {
-    *os << "are a tuple ";
-    PrintIndices(os);
-    inner_matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    *os << "are a tuple ";
-    PrintIndices(os);
-    inner_matcher_.DescribeNegationTo(os);
-  }
-
- private:
-  // Prints the indices of the selected fields.
-  static void PrintIndices(::std::ostream* os) {
-    *os << "whose fields (";
-    const char* sep = "";
-    // Workaround spurious C4189 on MSVC<=15.7 when k is empty.
-    (void)sep;
-    const char* dummy[] = {"", (*os << sep << "#" << k, sep = ", ")...};
-    (void)dummy;
-    *os << ") ";
-  }
-
-  MonomorphicInnerMatcher inner_matcher_;
-};
-
-template <class InnerMatcher, size_t... k>
-class ArgsMatcher {
- public:
-  explicit ArgsMatcher(InnerMatcher inner_matcher)
-      : inner_matcher_(std::move(inner_matcher)) {}
-
-  template <typename ArgsTuple>
-  operator Matcher<ArgsTuple>() const {  // NOLINT
-    return MakeMatcher(new ArgsMatcherImpl<ArgsTuple, k...>(inner_matcher_));
-  }
-
- private:
-  InnerMatcher inner_matcher_;
-};
-
-}  // namespace internal
-
-// ElementsAreArray(iterator_first, iterator_last)
-// ElementsAreArray(pointer, count)
-// ElementsAreArray(array)
-// ElementsAreArray(container)
-// ElementsAreArray({ e1, e2, ..., en })
-//
-// The ElementsAreArray() functions are like ElementsAre(...), except
-// that they are given a homogeneous sequence rather than taking each
-// element as a function argument. The sequence can be specified as an
-// array, a pointer and count, a vector, an initializer list, or an
-// STL iterator range. In each of these cases, the underlying sequence
-// can be either a sequence of values or a sequence of matchers.
-//
-// All forms of ElementsAreArray() make a copy of the input matcher sequence.
-
-template <typename Iter>
-inline internal::ElementsAreArrayMatcher<
-    typename ::std::iterator_traits<Iter>::value_type>
-ElementsAreArray(Iter first, Iter last) {
-  typedef typename ::std::iterator_traits<Iter>::value_type T;
-  return internal::ElementsAreArrayMatcher<T>(first, last);
-}
-
-template <typename T>
-inline internal::ElementsAreArrayMatcher<T> ElementsAreArray(
-    const T* pointer, size_t count) {
-  return ElementsAreArray(pointer, pointer + count);
-}
-
-template <typename T, size_t N>
-inline internal::ElementsAreArrayMatcher<T> ElementsAreArray(
-    const T (&array)[N]) {
-  return ElementsAreArray(array, N);
-}
-
-template <typename Container>
-inline internal::ElementsAreArrayMatcher<typename Container::value_type>
-ElementsAreArray(const Container& container) {
-  return ElementsAreArray(container.begin(), container.end());
-}
-
-template <typename T>
-inline internal::ElementsAreArrayMatcher<T>
-ElementsAreArray(::std::initializer_list<T> xs) {
-  return ElementsAreArray(xs.begin(), xs.end());
-}
-
-// UnorderedElementsAreArray(iterator_first, iterator_last)
-// UnorderedElementsAreArray(pointer, count)
-// UnorderedElementsAreArray(array)
-// UnorderedElementsAreArray(container)
-// UnorderedElementsAreArray({ e1, e2, ..., en })
-//
-// UnorderedElementsAreArray() verifies that a bijective mapping onto a
-// collection of matchers exists.
-//
-// The matchers can be specified as an array, a pointer and count, a container,
-// an initializer list, or an STL iterator range. In each of these cases, the
-// underlying matchers can be either values or matchers.
-
-template <typename Iter>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename ::std::iterator_traits<Iter>::value_type>
-UnorderedElementsAreArray(Iter first, Iter last) {
-  typedef typename ::std::iterator_traits<Iter>::value_type T;
-  return internal::UnorderedElementsAreArrayMatcher<T>(
-      internal::UnorderedMatcherRequire::ExactMatch, first, last);
-}
-
-template <typename T>
-inline internal::UnorderedElementsAreArrayMatcher<T>
-UnorderedElementsAreArray(const T* pointer, size_t count) {
-  return UnorderedElementsAreArray(pointer, pointer + count);
-}
-
-template <typename T, size_t N>
-inline internal::UnorderedElementsAreArrayMatcher<T>
-UnorderedElementsAreArray(const T (&array)[N]) {
-  return UnorderedElementsAreArray(array, N);
-}
-
-template <typename Container>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename Container::value_type>
-UnorderedElementsAreArray(const Container& container) {
-  return UnorderedElementsAreArray(container.begin(), container.end());
-}
-
-template <typename T>
-inline internal::UnorderedElementsAreArrayMatcher<T>
-UnorderedElementsAreArray(::std::initializer_list<T> xs) {
-  return UnorderedElementsAreArray(xs.begin(), xs.end());
-}
-
-// _ is a matcher that matches anything of any type.
-//
-// This definition is fine as:
-//
-//   1. The C++ standard permits using the name _ in a namespace that
-//      is not the global namespace or ::std.
-//   2. The AnythingMatcher class has no data member or constructor,
-//      so it's OK to create global variables of this type.
-//   3. c-style has approved of using _ in this case.
-const internal::AnythingMatcher _ = {};
-// Creates a matcher that matches any value of the given type T.
-template <typename T>
-inline Matcher<T> A() {
-  return _;
-}
-
-// Creates a matcher that matches any value of the given type T.
-template <typename T>
-inline Matcher<T> An() {
-  return _;
-}
-
-template <typename T, typename M>
-Matcher<T> internal::MatcherCastImpl<T, M>::CastImpl(
-    const M& value, std::false_type /* convertible_to_matcher */,
-    std::false_type /* convertible_to_T */) {
-  return Eq(value);
-}
-
-// Creates a polymorphic matcher that matches any NULL pointer.
-inline PolymorphicMatcher<internal::IsNullMatcher > IsNull() {
-  return MakePolymorphicMatcher(internal::IsNullMatcher());
-}
-
-// Creates a polymorphic matcher that matches any non-NULL pointer.
-// This is convenient as Not(NULL) doesn't compile (the compiler
-// thinks that that expression is comparing a pointer with an integer).
-inline PolymorphicMatcher<internal::NotNullMatcher > NotNull() {
-  return MakePolymorphicMatcher(internal::NotNullMatcher());
-}
-
-// Creates a polymorphic matcher that matches any argument that
-// references variable x.
-template <typename T>
-inline internal::RefMatcher<T&> Ref(T& x) {  // NOLINT
-  return internal::RefMatcher<T&>(x);
-}
-
-// Creates a polymorphic matcher that matches any NaN floating point.
-inline PolymorphicMatcher<internal::IsNanMatcher> IsNan() {
-  return MakePolymorphicMatcher(internal::IsNanMatcher());
-}
-
-// Creates a matcher that matches any double argument approximately
-// equal to rhs, where two NANs are considered unequal.
-inline internal::FloatingEqMatcher<double> DoubleEq(double rhs) {
-  return internal::FloatingEqMatcher<double>(rhs, false);
-}
-
-// Creates a matcher that matches any double argument approximately
-// equal to rhs, including NaN values when rhs is NaN.
-inline internal::FloatingEqMatcher<double> NanSensitiveDoubleEq(double rhs) {
-  return internal::FloatingEqMatcher<double>(rhs, true);
-}
-
-// Creates a matcher that matches any double argument approximately equal to
-// rhs, up to the specified max absolute error bound, where two NANs are
-// considered unequal.  The max absolute error bound must be non-negative.
-inline internal::FloatingEqMatcher<double> DoubleNear(
-    double rhs, double max_abs_error) {
-  return internal::FloatingEqMatcher<double>(rhs, false, max_abs_error);
-}
-
-// Creates a matcher that matches any double argument approximately equal to
-// rhs, up to the specified max absolute error bound, including NaN values when
-// rhs is NaN.  The max absolute error bound must be non-negative.
-inline internal::FloatingEqMatcher<double> NanSensitiveDoubleNear(
-    double rhs, double max_abs_error) {
-  return internal::FloatingEqMatcher<double>(rhs, true, max_abs_error);
-}
-
-// Creates a matcher that matches any float argument approximately
-// equal to rhs, where two NANs are considered unequal.
-inline internal::FloatingEqMatcher<float> FloatEq(float rhs) {
-  return internal::FloatingEqMatcher<float>(rhs, false);
-}
-
-// Creates a matcher that matches any float argument approximately
-// equal to rhs, including NaN values when rhs is NaN.
-inline internal::FloatingEqMatcher<float> NanSensitiveFloatEq(float rhs) {
-  return internal::FloatingEqMatcher<float>(rhs, true);
-}
-
-// Creates a matcher that matches any float argument approximately equal to
-// rhs, up to the specified max absolute error bound, where two NANs are
-// considered unequal.  The max absolute error bound must be non-negative.
-inline internal::FloatingEqMatcher<float> FloatNear(
-    float rhs, float max_abs_error) {
-  return internal::FloatingEqMatcher<float>(rhs, false, max_abs_error);
-}
-
-// Creates a matcher that matches any float argument approximately equal to
-// rhs, up to the specified max absolute error bound, including NaN values when
-// rhs is NaN.  The max absolute error bound must be non-negative.
-inline internal::FloatingEqMatcher<float> NanSensitiveFloatNear(
-    float rhs, float max_abs_error) {
-  return internal::FloatingEqMatcher<float>(rhs, true, max_abs_error);
-}
-
-// Creates a matcher that matches a pointer (raw or smart) that points
-// to a value that matches inner_matcher.
-template <typename InnerMatcher>
-inline internal::PointeeMatcher<InnerMatcher> Pointee(
-    const InnerMatcher& inner_matcher) {
-  return internal::PointeeMatcher<InnerMatcher>(inner_matcher);
-}
-
-#if GTEST_HAS_RTTI
-// Creates a matcher that matches a pointer or reference that matches
-// inner_matcher when dynamic_cast<To> is applied.
-// The result of dynamic_cast<To> is forwarded to the inner matcher.
-// If To is a pointer and the cast fails, the inner matcher will receive NULL.
-// If To is a reference and the cast fails, this matcher returns false
-// immediately.
-template <typename To>
-inline PolymorphicMatcher<internal::WhenDynamicCastToMatcher<To> >
-WhenDynamicCastTo(const Matcher<To>& inner_matcher) {
-  return MakePolymorphicMatcher(
-      internal::WhenDynamicCastToMatcher<To>(inner_matcher));
-}
-#endif  // GTEST_HAS_RTTI
-
-// Creates a matcher that matches an object whose given field matches
-// 'matcher'.  For example,
-//   Field(&Foo::number, Ge(5))
-// matches a Foo object x if and only if x.number >= 5.
-template <typename Class, typename FieldType, typename FieldMatcher>
-inline PolymorphicMatcher<
-  internal::FieldMatcher<Class, FieldType> > Field(
-    FieldType Class::*field, const FieldMatcher& matcher) {
-  return MakePolymorphicMatcher(
-      internal::FieldMatcher<Class, FieldType>(
-          field, MatcherCast<const FieldType&>(matcher)));
-  // The call to MatcherCast() is required for supporting inner
-  // matchers of compatible types.  For example, it allows
-  //   Field(&Foo::bar, m)
-  // to compile where bar is an int32 and m is a matcher for int64.
-}
-
-// Same as Field() but also takes the name of the field to provide better error
-// messages.
-template <typename Class, typename FieldType, typename FieldMatcher>
-inline PolymorphicMatcher<internal::FieldMatcher<Class, FieldType> > Field(
-    const std::string& field_name, FieldType Class::*field,
-    const FieldMatcher& matcher) {
-  return MakePolymorphicMatcher(internal::FieldMatcher<Class, FieldType>(
-      field_name, field, MatcherCast<const FieldType&>(matcher)));
-}
-
-// Creates a matcher that matches an object whose given property
-// matches 'matcher'.  For example,
-//   Property(&Foo::str, StartsWith("hi"))
-// matches a Foo object x if and only if x.str() starts with "hi".
-template <typename Class, typename PropertyType, typename PropertyMatcher>
-inline PolymorphicMatcher<internal::PropertyMatcher<
-    Class, PropertyType, PropertyType (Class::*)() const> >
-Property(PropertyType (Class::*property)() const,
-         const PropertyMatcher& matcher) {
-  return MakePolymorphicMatcher(
-      internal::PropertyMatcher<Class, PropertyType,
-                                PropertyType (Class::*)() const>(
-          property, MatcherCast<const PropertyType&>(matcher)));
-  // The call to MatcherCast() is required for supporting inner
-  // matchers of compatible types.  For example, it allows
-  //   Property(&Foo::bar, m)
-  // to compile where bar() returns an int32 and m is a matcher for int64.
-}
-
-// Same as Property() above, but also takes the name of the property to provide
-// better error messages.
-template <typename Class, typename PropertyType, typename PropertyMatcher>
-inline PolymorphicMatcher<internal::PropertyMatcher<
-    Class, PropertyType, PropertyType (Class::*)() const> >
-Property(const std::string& property_name,
-         PropertyType (Class::*property)() const,
-         const PropertyMatcher& matcher) {
-  return MakePolymorphicMatcher(
-      internal::PropertyMatcher<Class, PropertyType,
-                                PropertyType (Class::*)() const>(
-          property_name, property, MatcherCast<const PropertyType&>(matcher)));
-}
-
-// The same as above but for reference-qualified member functions.
-template <typename Class, typename PropertyType, typename PropertyMatcher>
-inline PolymorphicMatcher<internal::PropertyMatcher<
-    Class, PropertyType, PropertyType (Class::*)() const &> >
-Property(PropertyType (Class::*property)() const &,
-         const PropertyMatcher& matcher) {
-  return MakePolymorphicMatcher(
-      internal::PropertyMatcher<Class, PropertyType,
-                                PropertyType (Class::*)() const&>(
-          property, MatcherCast<const PropertyType&>(matcher)));
-}
-
-// Three-argument form for reference-qualified member functions.
-template <typename Class, typename PropertyType, typename PropertyMatcher>
-inline PolymorphicMatcher<internal::PropertyMatcher<
-    Class, PropertyType, PropertyType (Class::*)() const &> >
-Property(const std::string& property_name,
-         PropertyType (Class::*property)() const &,
-         const PropertyMatcher& matcher) {
-  return MakePolymorphicMatcher(
-      internal::PropertyMatcher<Class, PropertyType,
-                                PropertyType (Class::*)() const&>(
-          property_name, property, MatcherCast<const PropertyType&>(matcher)));
-}
-
-// Creates a matcher that matches an object if and only if the result of
-// applying a callable to x matches 'matcher'. For example,
-//   ResultOf(f, StartsWith("hi"))
-// matches a Foo object x if and only if f(x) starts with "hi".
-// `callable` parameter can be a function, function pointer, or a functor. It is
-// required to keep no state affecting the results of the calls on it and make
-// no assumptions about how many calls will be made. Any state it keeps must be
-// protected from the concurrent access.
-template <typename Callable, typename InnerMatcher>
-internal::ResultOfMatcher<Callable, InnerMatcher> ResultOf(
-    Callable callable, InnerMatcher matcher) {
-  return internal::ResultOfMatcher<Callable, InnerMatcher>(
-      std::move(callable), std::move(matcher));
-}
-
-// String matchers.
-
-// Matches a string equal to str.
-template <typename T = std::string>
-PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrEq(
-    const internal::StringLike<T>& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::string>(std::string(str), true, true));
-}
-
-// Matches a string not equal to str.
-template <typename T = std::string>
-PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrNe(
-    const internal::StringLike<T>& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::string>(std::string(str), false, true));
-}
-
-// Matches a string equal to str, ignoring case.
-template <typename T = std::string>
-PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrCaseEq(
-    const internal::StringLike<T>& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::string>(std::string(str), true, false));
-}
-
-// Matches a string not equal to str, ignoring case.
-template <typename T = std::string>
-PolymorphicMatcher<internal::StrEqualityMatcher<std::string> > StrCaseNe(
-    const internal::StringLike<T>& str) {
-  return MakePolymorphicMatcher(internal::StrEqualityMatcher<std::string>(
-      std::string(str), false, false));
-}
-
-// Creates a matcher that matches any string, std::string, or C string
-// that contains the given substring.
-template <typename T = std::string>
-PolymorphicMatcher<internal::HasSubstrMatcher<std::string> > HasSubstr(
-    const internal::StringLike<T>& substring) {
-  return MakePolymorphicMatcher(
-      internal::HasSubstrMatcher<std::string>(std::string(substring)));
-}
-
-// Matches a string that starts with 'prefix' (case-sensitive).
-template <typename T = std::string>
-PolymorphicMatcher<internal::StartsWithMatcher<std::string> > StartsWith(
-    const internal::StringLike<T>& prefix) {
-  return MakePolymorphicMatcher(
-      internal::StartsWithMatcher<std::string>(std::string(prefix)));
-}
-
-// Matches a string that ends with 'suffix' (case-sensitive).
-template <typename T = std::string>
-PolymorphicMatcher<internal::EndsWithMatcher<std::string> > EndsWith(
-    const internal::StringLike<T>& suffix) {
-  return MakePolymorphicMatcher(
-      internal::EndsWithMatcher<std::string>(std::string(suffix)));
-}
-
-#if GTEST_HAS_STD_WSTRING
-// Wide string matchers.
-
-// Matches a string equal to str.
-inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> > StrEq(
-    const std::wstring& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::wstring>(str, true, true));
-}
-
-// Matches a string not equal to str.
-inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> > StrNe(
-    const std::wstring& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::wstring>(str, false, true));
-}
-
-// Matches a string equal to str, ignoring case.
-inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> >
-StrCaseEq(const std::wstring& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::wstring>(str, true, false));
-}
-
-// Matches a string not equal to str, ignoring case.
-inline PolymorphicMatcher<internal::StrEqualityMatcher<std::wstring> >
-StrCaseNe(const std::wstring& str) {
-  return MakePolymorphicMatcher(
-      internal::StrEqualityMatcher<std::wstring>(str, false, false));
-}
-
-// Creates a matcher that matches any ::wstring, std::wstring, or C wide string
-// that contains the given substring.
-inline PolymorphicMatcher<internal::HasSubstrMatcher<std::wstring> > HasSubstr(
-    const std::wstring& substring) {
-  return MakePolymorphicMatcher(
-      internal::HasSubstrMatcher<std::wstring>(substring));
-}
-
-// Matches a string that starts with 'prefix' (case-sensitive).
-inline PolymorphicMatcher<internal::StartsWithMatcher<std::wstring> >
-StartsWith(const std::wstring& prefix) {
-  return MakePolymorphicMatcher(
-      internal::StartsWithMatcher<std::wstring>(prefix));
-}
-
-// Matches a string that ends with 'suffix' (case-sensitive).
-inline PolymorphicMatcher<internal::EndsWithMatcher<std::wstring> > EndsWith(
-    const std::wstring& suffix) {
-  return MakePolymorphicMatcher(
-      internal::EndsWithMatcher<std::wstring>(suffix));
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Creates a polymorphic matcher that matches a 2-tuple where the
-// first field == the second field.
-inline internal::Eq2Matcher Eq() { return internal::Eq2Matcher(); }
-
-// Creates a polymorphic matcher that matches a 2-tuple where the
-// first field >= the second field.
-inline internal::Ge2Matcher Ge() { return internal::Ge2Matcher(); }
-
-// Creates a polymorphic matcher that matches a 2-tuple where the
-// first field > the second field.
-inline internal::Gt2Matcher Gt() { return internal::Gt2Matcher(); }
-
-// Creates a polymorphic matcher that matches a 2-tuple where the
-// first field <= the second field.
-inline internal::Le2Matcher Le() { return internal::Le2Matcher(); }
-
-// Creates a polymorphic matcher that matches a 2-tuple where the
-// first field < the second field.
-inline internal::Lt2Matcher Lt() { return internal::Lt2Matcher(); }
-
-// Creates a polymorphic matcher that matches a 2-tuple where the
-// first field != the second field.
-inline internal::Ne2Matcher Ne() { return internal::Ne2Matcher(); }
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// FloatEq(first field) matches the second field.
-inline internal::FloatingEq2Matcher<float> FloatEq() {
-  return internal::FloatingEq2Matcher<float>();
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// DoubleEq(first field) matches the second field.
-inline internal::FloatingEq2Matcher<double> DoubleEq() {
-  return internal::FloatingEq2Matcher<double>();
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// FloatEq(first field) matches the second field with NaN equality.
-inline internal::FloatingEq2Matcher<float> NanSensitiveFloatEq() {
-  return internal::FloatingEq2Matcher<float>(true);
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// DoubleEq(first field) matches the second field with NaN equality.
-inline internal::FloatingEq2Matcher<double> NanSensitiveDoubleEq() {
-  return internal::FloatingEq2Matcher<double>(true);
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// FloatNear(first field, max_abs_error) matches the second field.
-inline internal::FloatingEq2Matcher<float> FloatNear(float max_abs_error) {
-  return internal::FloatingEq2Matcher<float>(max_abs_error);
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// DoubleNear(first field, max_abs_error) matches the second field.
-inline internal::FloatingEq2Matcher<double> DoubleNear(double max_abs_error) {
-  return internal::FloatingEq2Matcher<double>(max_abs_error);
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// FloatNear(first field, max_abs_error) matches the second field with NaN
-// equality.
-inline internal::FloatingEq2Matcher<float> NanSensitiveFloatNear(
-    float max_abs_error) {
-  return internal::FloatingEq2Matcher<float>(max_abs_error, true);
-}
-
-// Creates a polymorphic matcher that matches a 2-tuple where
-// DoubleNear(first field, max_abs_error) matches the second field with NaN
-// equality.
-inline internal::FloatingEq2Matcher<double> NanSensitiveDoubleNear(
-    double max_abs_error) {
-  return internal::FloatingEq2Matcher<double>(max_abs_error, true);
-}
-
-// Creates a matcher that matches any value of type T that m doesn't
-// match.
-template <typename InnerMatcher>
-inline internal::NotMatcher<InnerMatcher> Not(InnerMatcher m) {
-  return internal::NotMatcher<InnerMatcher>(m);
-}
-
-// Returns a matcher that matches anything that satisfies the given
-// predicate.  The predicate can be any unary function or functor
-// whose return type can be implicitly converted to bool.
-template <typename Predicate>
-inline PolymorphicMatcher<internal::TrulyMatcher<Predicate> >
-Truly(Predicate pred) {
-  return MakePolymorphicMatcher(internal::TrulyMatcher<Predicate>(pred));
-}
-
-// Returns a matcher that matches the container size. The container must
-// support both size() and size_type which all STL-like containers provide.
-// Note that the parameter 'size' can be a value of type size_type as well as
-// matcher. For instance:
-//   EXPECT_THAT(container, SizeIs(2));     // Checks container has 2 elements.
-//   EXPECT_THAT(container, SizeIs(Le(2));  // Checks container has at most 2.
-template <typename SizeMatcher>
-inline internal::SizeIsMatcher<SizeMatcher>
-SizeIs(const SizeMatcher& size_matcher) {
-  return internal::SizeIsMatcher<SizeMatcher>(size_matcher);
-}
-
-// Returns a matcher that matches the distance between the container's begin()
-// iterator and its end() iterator, i.e. the size of the container. This matcher
-// can be used instead of SizeIs with containers such as std::forward_list which
-// do not implement size(). The container must provide const_iterator (with
-// valid iterator_traits), begin() and end().
-template <typename DistanceMatcher>
-inline internal::BeginEndDistanceIsMatcher<DistanceMatcher>
-BeginEndDistanceIs(const DistanceMatcher& distance_matcher) {
-  return internal::BeginEndDistanceIsMatcher<DistanceMatcher>(distance_matcher);
-}
-
-// Returns a matcher that matches an equal container.
-// This matcher behaves like Eq(), but in the event of mismatch lists the
-// values that are included in one container but not the other. (Duplicate
-// values and order differences are not explained.)
-template <typename Container>
-inline PolymorphicMatcher<internal::ContainerEqMatcher<
-    typename std::remove_const<Container>::type>>
-ContainerEq(const Container& rhs) {
-  return MakePolymorphicMatcher(internal::ContainerEqMatcher<Container>(rhs));
-}
-
-// Returns a matcher that matches a container that, when sorted using
-// the given comparator, matches container_matcher.
-template <typename Comparator, typename ContainerMatcher>
-inline internal::WhenSortedByMatcher<Comparator, ContainerMatcher>
-WhenSortedBy(const Comparator& comparator,
-             const ContainerMatcher& container_matcher) {
-  return internal::WhenSortedByMatcher<Comparator, ContainerMatcher>(
-      comparator, container_matcher);
-}
-
-// Returns a matcher that matches a container that, when sorted using
-// the < operator, matches container_matcher.
-template <typename ContainerMatcher>
-inline internal::WhenSortedByMatcher<internal::LessComparator, ContainerMatcher>
-WhenSorted(const ContainerMatcher& container_matcher) {
-  return
-      internal::WhenSortedByMatcher<internal::LessComparator, ContainerMatcher>(
-          internal::LessComparator(), container_matcher);
-}
-
-// Matches an STL-style container or a native array that contains the
-// same number of elements as in rhs, where its i-th element and rhs's
-// i-th element (as a pair) satisfy the given pair matcher, for all i.
-// TupleMatcher must be able to be safely cast to Matcher<std::tuple<const
-// T1&, const T2&> >, where T1 and T2 are the types of elements in the
-// LHS container and the RHS container respectively.
-template <typename TupleMatcher, typename Container>
-inline internal::PointwiseMatcher<TupleMatcher,
-                                  typename std::remove_const<Container>::type>
-Pointwise(const TupleMatcher& tuple_matcher, const Container& rhs) {
-  return internal::PointwiseMatcher<TupleMatcher, Container>(tuple_matcher,
-                                                             rhs);
-}
-
-
-// Supports the Pointwise(m, {a, b, c}) syntax.
-template <typename TupleMatcher, typename T>
-inline internal::PointwiseMatcher<TupleMatcher, std::vector<T> > Pointwise(
-    const TupleMatcher& tuple_matcher, std::initializer_list<T> rhs) {
-  return Pointwise(tuple_matcher, std::vector<T>(rhs));
-}
-
-
-// UnorderedPointwise(pair_matcher, rhs) matches an STL-style
-// container or a native array that contains the same number of
-// elements as in rhs, where in some permutation of the container, its
-// i-th element and rhs's i-th element (as a pair) satisfy the given
-// pair matcher, for all i.  Tuple2Matcher must be able to be safely
-// cast to Matcher<std::tuple<const T1&, const T2&> >, where T1 and T2 are
-// the types of elements in the LHS container and the RHS container
-// respectively.
-//
-// This is like Pointwise(pair_matcher, rhs), except that the element
-// order doesn't matter.
-template <typename Tuple2Matcher, typename RhsContainer>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename internal::BoundSecondMatcher<
-        Tuple2Matcher,
-        typename internal::StlContainerView<
-            typename std::remove_const<RhsContainer>::type>::type::value_type>>
-UnorderedPointwise(const Tuple2Matcher& tuple2_matcher,
-                   const RhsContainer& rhs_container) {
-  // RhsView allows the same code to handle RhsContainer being a
-  // STL-style container and it being a native C-style array.
-  typedef typename internal::StlContainerView<RhsContainer> RhsView;
-  typedef typename RhsView::type RhsStlContainer;
-  typedef typename RhsStlContainer::value_type Second;
-  const RhsStlContainer& rhs_stl_container =
-      RhsView::ConstReference(rhs_container);
-
-  // Create a matcher for each element in rhs_container.
-  ::std::vector<internal::BoundSecondMatcher<Tuple2Matcher, Second> > matchers;
-  for (typename RhsStlContainer::const_iterator it = rhs_stl_container.begin();
-       it != rhs_stl_container.end(); ++it) {
-    matchers.push_back(
-        internal::MatcherBindSecond(tuple2_matcher, *it));
-  }
-
-  // Delegate the work to UnorderedElementsAreArray().
-  return UnorderedElementsAreArray(matchers);
-}
-
-
-// Supports the UnorderedPointwise(m, {a, b, c}) syntax.
-template <typename Tuple2Matcher, typename T>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename internal::BoundSecondMatcher<Tuple2Matcher, T> >
-UnorderedPointwise(const Tuple2Matcher& tuple2_matcher,
-                   std::initializer_list<T> rhs) {
-  return UnorderedPointwise(tuple2_matcher, std::vector<T>(rhs));
-}
-
-
-// Matches an STL-style container or a native array that contains at
-// least one element matching the given value or matcher.
-//
-// Examples:
-//   ::std::set<int> page_ids;
-//   page_ids.insert(3);
-//   page_ids.insert(1);
-//   EXPECT_THAT(page_ids, Contains(1));
-//   EXPECT_THAT(page_ids, Contains(Gt(2)));
-//   EXPECT_THAT(page_ids, Not(Contains(4)));
-//
-//   ::std::map<int, size_t> page_lengths;
-//   page_lengths[1] = 100;
-//   EXPECT_THAT(page_lengths,
-//               Contains(::std::pair<const int, size_t>(1, 100)));
-//
-//   const char* user_ids[] = { "joe", "mike", "tom" };
-//   EXPECT_THAT(user_ids, Contains(Eq(::std::string("tom"))));
-template <typename M>
-inline internal::ContainsMatcher<M> Contains(M matcher) {
-  return internal::ContainsMatcher<M>(matcher);
-}
-
-// IsSupersetOf(iterator_first, iterator_last)
-// IsSupersetOf(pointer, count)
-// IsSupersetOf(array)
-// IsSupersetOf(container)
-// IsSupersetOf({e1, e2, ..., en})
-//
-// IsSupersetOf() verifies that a surjective partial mapping onto a collection
-// of matchers exists. In other words, a container matches
-// IsSupersetOf({e1, ..., en}) if and only if there is a permutation
-// {y1, ..., yn} of some of the container's elements where y1 matches e1,
-// ..., and yn matches en. Obviously, the size of the container must be >= n
-// in order to have a match. Examples:
-//
-// - {1, 2, 3} matches IsSupersetOf({Ge(3), Ne(0)}), as 3 matches Ge(3) and
-//   1 matches Ne(0).
-// - {1, 2} doesn't match IsSupersetOf({Eq(1), Lt(2)}), even though 1 matches
-//   both Eq(1) and Lt(2). The reason is that different matchers must be used
-//   for elements in different slots of the container.
-// - {1, 1, 2} matches IsSupersetOf({Eq(1), Lt(2)}), as (the first) 1 matches
-//   Eq(1) and (the second) 1 matches Lt(2).
-// - {1, 2, 3} matches IsSupersetOf(Gt(1), Gt(1)), as 2 matches (the first)
-//   Gt(1) and 3 matches (the second) Gt(1).
-//
-// The matchers can be specified as an array, a pointer and count, a container,
-// an initializer list, or an STL iterator range. In each of these cases, the
-// underlying matchers can be either values or matchers.
-
-template <typename Iter>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename ::std::iterator_traits<Iter>::value_type>
-IsSupersetOf(Iter first, Iter last) {
-  typedef typename ::std::iterator_traits<Iter>::value_type T;
-  return internal::UnorderedElementsAreArrayMatcher<T>(
-      internal::UnorderedMatcherRequire::Superset, first, last);
-}
-
-template <typename T>
-inline internal::UnorderedElementsAreArrayMatcher<T> IsSupersetOf(
-    const T* pointer, size_t count) {
-  return IsSupersetOf(pointer, pointer + count);
-}
-
-template <typename T, size_t N>
-inline internal::UnorderedElementsAreArrayMatcher<T> IsSupersetOf(
-    const T (&array)[N]) {
-  return IsSupersetOf(array, N);
-}
-
-template <typename Container>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename Container::value_type>
-IsSupersetOf(const Container& container) {
-  return IsSupersetOf(container.begin(), container.end());
-}
-
-template <typename T>
-inline internal::UnorderedElementsAreArrayMatcher<T> IsSupersetOf(
-    ::std::initializer_list<T> xs) {
-  return IsSupersetOf(xs.begin(), xs.end());
-}
-
-// IsSubsetOf(iterator_first, iterator_last)
-// IsSubsetOf(pointer, count)
-// IsSubsetOf(array)
-// IsSubsetOf(container)
-// IsSubsetOf({e1, e2, ..., en})
-//
-// IsSubsetOf() verifies that an injective mapping onto a collection of matchers
-// exists.  In other words, a container matches IsSubsetOf({e1, ..., en}) if and
-// only if there is a subset of matchers {m1, ..., mk} which would match the
-// container using UnorderedElementsAre.  Obviously, the size of the container
-// must be <= n in order to have a match. Examples:
-//
-// - {1} matches IsSubsetOf({Gt(0), Lt(0)}), as 1 matches Gt(0).
-// - {1, -1} matches IsSubsetOf({Lt(0), Gt(0)}), as 1 matches Gt(0) and -1
-//   matches Lt(0).
-// - {1, 2} doesn't matches IsSubsetOf({Gt(0), Lt(0)}), even though 1 and 2 both
-//   match Gt(0). The reason is that different matchers must be used for
-//   elements in different slots of the container.
-//
-// The matchers can be specified as an array, a pointer and count, a container,
-// an initializer list, or an STL iterator range. In each of these cases, the
-// underlying matchers can be either values or matchers.
-
-template <typename Iter>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename ::std::iterator_traits<Iter>::value_type>
-IsSubsetOf(Iter first, Iter last) {
-  typedef typename ::std::iterator_traits<Iter>::value_type T;
-  return internal::UnorderedElementsAreArrayMatcher<T>(
-      internal::UnorderedMatcherRequire::Subset, first, last);
-}
-
-template <typename T>
-inline internal::UnorderedElementsAreArrayMatcher<T> IsSubsetOf(
-    const T* pointer, size_t count) {
-  return IsSubsetOf(pointer, pointer + count);
-}
-
-template <typename T, size_t N>
-inline internal::UnorderedElementsAreArrayMatcher<T> IsSubsetOf(
-    const T (&array)[N]) {
-  return IsSubsetOf(array, N);
-}
-
-template <typename Container>
-inline internal::UnorderedElementsAreArrayMatcher<
-    typename Container::value_type>
-IsSubsetOf(const Container& container) {
-  return IsSubsetOf(container.begin(), container.end());
-}
-
-template <typename T>
-inline internal::UnorderedElementsAreArrayMatcher<T> IsSubsetOf(
-    ::std::initializer_list<T> xs) {
-  return IsSubsetOf(xs.begin(), xs.end());
-}
-
-// Matches an STL-style container or a native array that contains only
-// elements matching the given value or matcher.
-//
-// Each(m) is semantically equivalent to Not(Contains(Not(m))). Only
-// the messages are different.
-//
-// Examples:
-//   ::std::set<int> page_ids;
-//   // Each(m) matches an empty container, regardless of what m is.
-//   EXPECT_THAT(page_ids, Each(Eq(1)));
-//   EXPECT_THAT(page_ids, Each(Eq(77)));
-//
-//   page_ids.insert(3);
-//   EXPECT_THAT(page_ids, Each(Gt(0)));
-//   EXPECT_THAT(page_ids, Not(Each(Gt(4))));
-//   page_ids.insert(1);
-//   EXPECT_THAT(page_ids, Not(Each(Lt(2))));
-//
-//   ::std::map<int, size_t> page_lengths;
-//   page_lengths[1] = 100;
-//   page_lengths[2] = 200;
-//   page_lengths[3] = 300;
-//   EXPECT_THAT(page_lengths, Not(Each(Pair(1, 100))));
-//   EXPECT_THAT(page_lengths, Each(Key(Le(3))));
-//
-//   const char* user_ids[] = { "joe", "mike", "tom" };
-//   EXPECT_THAT(user_ids, Not(Each(Eq(::std::string("tom")))));
-template <typename M>
-inline internal::EachMatcher<M> Each(M matcher) {
-  return internal::EachMatcher<M>(matcher);
-}
-
-// Key(inner_matcher) matches an std::pair whose 'first' field matches
-// inner_matcher.  For example, Contains(Key(Ge(5))) can be used to match an
-// std::map that contains at least one element whose key is >= 5.
-template <typename M>
-inline internal::KeyMatcher<M> Key(M inner_matcher) {
-  return internal::KeyMatcher<M>(inner_matcher);
-}
-
-// Pair(first_matcher, second_matcher) matches a std::pair whose 'first' field
-// matches first_matcher and whose 'second' field matches second_matcher.  For
-// example, EXPECT_THAT(map_type, ElementsAre(Pair(Ge(5), "foo"))) can be used
-// to match a std::map<int, string> that contains exactly one element whose key
-// is >= 5 and whose value equals "foo".
-template <typename FirstMatcher, typename SecondMatcher>
-inline internal::PairMatcher<FirstMatcher, SecondMatcher>
-Pair(FirstMatcher first_matcher, SecondMatcher second_matcher) {
-  return internal::PairMatcher<FirstMatcher, SecondMatcher>(
-      first_matcher, second_matcher);
-}
-
-namespace no_adl {
-// FieldsAre(matchers...) matches piecewise the fields of compatible structs.
-// These include those that support `get<I>(obj)`, and when structured bindings
-// are enabled any class that supports them.
-// In particular, `std::tuple`, `std::pair`, `std::array` and aggregate types.
-template <typename... M>
-internal::FieldsAreMatcher<typename std::decay<M>::type...> FieldsAre(
-    M&&... matchers) {
-  return internal::FieldsAreMatcher<typename std::decay<M>::type...>(
-      std::forward<M>(matchers)...);
-}
-
-// Creates a matcher that matches a pointer (raw or smart) that matches
-// inner_matcher.
-template <typename InnerMatcher>
-inline internal::PointerMatcher<InnerMatcher> Pointer(
-    const InnerMatcher& inner_matcher) {
-  return internal::PointerMatcher<InnerMatcher>(inner_matcher);
-}
-
-// Creates a matcher that matches an object that has an address that matches
-// inner_matcher.
-template <typename InnerMatcher>
-inline internal::AddressMatcher<InnerMatcher> Address(
-    const InnerMatcher& inner_matcher) {
-  return internal::AddressMatcher<InnerMatcher>(inner_matcher);
-}
-}  // namespace no_adl
-
-// Returns a predicate that is satisfied by anything that matches the
-// given matcher.
-template <typename M>
-inline internal::MatcherAsPredicate<M> Matches(M matcher) {
-  return internal::MatcherAsPredicate<M>(matcher);
-}
-
-// Returns true if and only if the value matches the matcher.
-template <typename T, typename M>
-inline bool Value(const T& value, M matcher) {
-  return testing::Matches(matcher)(value);
-}
-
-// Matches the value against the given matcher and explains the match
-// result to listener.
-template <typename T, typename M>
-inline bool ExplainMatchResult(
-    M matcher, const T& value, MatchResultListener* listener) {
-  return SafeMatcherCast<const T&>(matcher).MatchAndExplain(value, listener);
-}
-
-// Returns a string representation of the given matcher.  Useful for description
-// strings of matchers defined using MATCHER_P* macros that accept matchers as
-// their arguments.  For example:
-//
-// MATCHER_P(XAndYThat, matcher,
-//           "X that " + DescribeMatcher<int>(matcher, negation) +
-//               " and Y that " + DescribeMatcher<double>(matcher, negation)) {
-//   return ExplainMatchResult(matcher, arg.x(), result_listener) &&
-//          ExplainMatchResult(matcher, arg.y(), result_listener);
-// }
-template <typename T, typename M>
-std::string DescribeMatcher(const M& matcher, bool negation = false) {
-  ::std::stringstream ss;
-  Matcher<T> monomorphic_matcher = SafeMatcherCast<T>(matcher);
-  if (negation) {
-    monomorphic_matcher.DescribeNegationTo(&ss);
-  } else {
-    monomorphic_matcher.DescribeTo(&ss);
-  }
-  return ss.str();
-}
-
-template <typename... Args>
-internal::ElementsAreMatcher<
-    std::tuple<typename std::decay<const Args&>::type...>>
-ElementsAre(const Args&... matchers) {
-  return internal::ElementsAreMatcher<
-      std::tuple<typename std::decay<const Args&>::type...>>(
-      std::make_tuple(matchers...));
-}
-
-template <typename... Args>
-internal::UnorderedElementsAreMatcher<
-    std::tuple<typename std::decay<const Args&>::type...>>
-UnorderedElementsAre(const Args&... matchers) {
-  return internal::UnorderedElementsAreMatcher<
-      std::tuple<typename std::decay<const Args&>::type...>>(
-      std::make_tuple(matchers...));
-}
-
-// Define variadic matcher versions.
-template <typename... Args>
-internal::AllOfMatcher<typename std::decay<const Args&>::type...> AllOf(
-    const Args&... matchers) {
-  return internal::AllOfMatcher<typename std::decay<const Args&>::type...>(
-      matchers...);
-}
-
-template <typename... Args>
-internal::AnyOfMatcher<typename std::decay<const Args&>::type...> AnyOf(
-    const Args&... matchers) {
-  return internal::AnyOfMatcher<typename std::decay<const Args&>::type...>(
-      matchers...);
-}
-
-// AnyOfArray(array)
-// AnyOfArray(pointer, count)
-// AnyOfArray(container)
-// AnyOfArray({ e1, e2, ..., en })
-// AnyOfArray(iterator_first, iterator_last)
-//
-// AnyOfArray() verifies whether a given value matches any member of a
-// collection of matchers.
-//
-// AllOfArray(array)
-// AllOfArray(pointer, count)
-// AllOfArray(container)
-// AllOfArray({ e1, e2, ..., en })
-// AllOfArray(iterator_first, iterator_last)
-//
-// AllOfArray() verifies whether a given value matches all members of a
-// collection of matchers.
-//
-// The matchers can be specified as an array, a pointer and count, a container,
-// an initializer list, or an STL iterator range. In each of these cases, the
-// underlying matchers can be either values or matchers.
-
-template <typename Iter>
-inline internal::AnyOfArrayMatcher<
-    typename ::std::iterator_traits<Iter>::value_type>
-AnyOfArray(Iter first, Iter last) {
-  return internal::AnyOfArrayMatcher<
-      typename ::std::iterator_traits<Iter>::value_type>(first, last);
-}
-
-template <typename Iter>
-inline internal::AllOfArrayMatcher<
-    typename ::std::iterator_traits<Iter>::value_type>
-AllOfArray(Iter first, Iter last) {
-  return internal::AllOfArrayMatcher<
-      typename ::std::iterator_traits<Iter>::value_type>(first, last);
-}
-
-template <typename T>
-inline internal::AnyOfArrayMatcher<T> AnyOfArray(const T* ptr, size_t count) {
-  return AnyOfArray(ptr, ptr + count);
-}
-
-template <typename T>
-inline internal::AllOfArrayMatcher<T> AllOfArray(const T* ptr, size_t count) {
-  return AllOfArray(ptr, ptr + count);
-}
-
-template <typename T, size_t N>
-inline internal::AnyOfArrayMatcher<T> AnyOfArray(const T (&array)[N]) {
-  return AnyOfArray(array, N);
-}
-
-template <typename T, size_t N>
-inline internal::AllOfArrayMatcher<T> AllOfArray(const T (&array)[N]) {
-  return AllOfArray(array, N);
-}
-
-template <typename Container>
-inline internal::AnyOfArrayMatcher<typename Container::value_type> AnyOfArray(
-    const Container& container) {
-  return AnyOfArray(container.begin(), container.end());
-}
-
-template <typename Container>
-inline internal::AllOfArrayMatcher<typename Container::value_type> AllOfArray(
-    const Container& container) {
-  return AllOfArray(container.begin(), container.end());
-}
-
-template <typename T>
-inline internal::AnyOfArrayMatcher<T> AnyOfArray(
-    ::std::initializer_list<T> xs) {
-  return AnyOfArray(xs.begin(), xs.end());
-}
-
-template <typename T>
-inline internal::AllOfArrayMatcher<T> AllOfArray(
-    ::std::initializer_list<T> xs) {
-  return AllOfArray(xs.begin(), xs.end());
-}
-
-// Args<N1, N2, ..., Nk>(a_matcher) matches a tuple if the selected
-// fields of it matches a_matcher.  C++ doesn't support default
-// arguments for function templates, so we have to overload it.
-template <size_t... k, typename InnerMatcher>
-internal::ArgsMatcher<typename std::decay<InnerMatcher>::type, k...> Args(
-    InnerMatcher&& matcher) {
-  return internal::ArgsMatcher<typename std::decay<InnerMatcher>::type, k...>(
-      std::forward<InnerMatcher>(matcher));
-}
-
-// AllArgs(m) is a synonym of m.  This is useful in
-//
-//   EXPECT_CALL(foo, Bar(_, _)).With(AllArgs(Eq()));
-//
-// which is easier to read than
-//
-//   EXPECT_CALL(foo, Bar(_, _)).With(Eq());
-template <typename InnerMatcher>
-inline InnerMatcher AllArgs(const InnerMatcher& matcher) { return matcher; }
-
-// Returns a matcher that matches the value of an optional<> type variable.
-// The matcher implementation only uses '!arg' and requires that the optional<>
-// type has a 'value_type' member type and that '*arg' is of type 'value_type'
-// and is printable using 'PrintToString'. It is compatible with
-// std::optional/std::experimental::optional.
-// Note that to compare an optional type variable against nullopt you should
-// use Eq(nullopt) and not Eq(Optional(nullopt)). The latter implies that the
-// optional value contains an optional itself.
-template <typename ValueMatcher>
-inline internal::OptionalMatcher<ValueMatcher> Optional(
-    const ValueMatcher& value_matcher) {
-  return internal::OptionalMatcher<ValueMatcher>(value_matcher);
-}
-
-// Returns a matcher that matches the value of a absl::any type variable.
-template <typename T>
-PolymorphicMatcher<internal::any_cast_matcher::AnyCastMatcher<T> > AnyWith(
-    const Matcher<const T&>& matcher) {
-  return MakePolymorphicMatcher(
-      internal::any_cast_matcher::AnyCastMatcher<T>(matcher));
-}
-
-// Returns a matcher that matches the value of a variant<> type variable.
-// The matcher implementation uses ADL to find the holds_alternative and get
-// functions.
-// It is compatible with std::variant.
-template <typename T>
-PolymorphicMatcher<internal::variant_matcher::VariantMatcher<T> > VariantWith(
-    const Matcher<const T&>& matcher) {
-  return MakePolymorphicMatcher(
-      internal::variant_matcher::VariantMatcher<T>(matcher));
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Anything inside the `internal` namespace is internal to the implementation
-// and must not be used in user code!
-namespace internal {
-
-class WithWhatMatcherImpl {
- public:
-  WithWhatMatcherImpl(Matcher<std::string> matcher)
-      : matcher_(std::move(matcher)) {}
-
-  void DescribeTo(std::ostream* os) const {
-    *os << "contains .what() that ";
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(std::ostream* os) const {
-    *os << "contains .what() that does not ";
-    matcher_.DescribeTo(os);
-  }
-
-  template <typename Err>
-  bool MatchAndExplain(const Err& err, MatchResultListener* listener) const {
-    *listener << "which contains .what() that ";
-    return matcher_.MatchAndExplain(err.what(), listener);
-  }
-
- private:
-  const Matcher<std::string> matcher_;
-};
-
-inline PolymorphicMatcher<WithWhatMatcherImpl> WithWhat(
-    Matcher<std::string> m) {
-  return MakePolymorphicMatcher(WithWhatMatcherImpl(std::move(m)));
-}
-
-template <typename Err>
-class ExceptionMatcherImpl {
-  class NeverThrown {
-   public:
-    const char* what() const noexcept {
-      return "this exception should never be thrown";
-    }
-  };
-
-  // If the matchee raises an exception of a wrong type, we'd like to
-  // catch it and print its message and type. To do that, we add an additional
-  // catch clause:
-  //
-  //     try { ... }
-  //     catch (const Err&) { /* an expected exception */ }
-  //     catch (const std::exception&) { /* exception of a wrong type */ }
-  //
-  // However, if the `Err` itself is `std::exception`, we'd end up with two
-  // identical `catch` clauses:
-  //
-  //     try { ... }
-  //     catch (const std::exception&) { /* an expected exception */ }
-  //     catch (const std::exception&) { /* exception of a wrong type */ }
-  //
-  // This can cause a warning or an error in some compilers. To resolve
-  // the issue, we use a fake error type whenever `Err` is `std::exception`:
-  //
-  //     try { ... }
-  //     catch (const std::exception&) { /* an expected exception */ }
-  //     catch (const NeverThrown&) { /* exception of a wrong type */ }
-  using DefaultExceptionType = typename std::conditional<
-      std::is_same<typename std::remove_cv<
-                       typename std::remove_reference<Err>::type>::type,
-                   std::exception>::value,
-      const NeverThrown&, const std::exception&>::type;
-
- public:
-  ExceptionMatcherImpl(Matcher<const Err&> matcher)
-      : matcher_(std::move(matcher)) {}
-
-  void DescribeTo(std::ostream* os) const {
-    *os << "throws an exception which is a " << GetTypeName<Err>();
-    *os << " which ";
-    matcher_.DescribeTo(os);
-  }
-
-  void DescribeNegationTo(std::ostream* os) const {
-    *os << "throws an exception which is not a " << GetTypeName<Err>();
-    *os << " which ";
-    matcher_.DescribeNegationTo(os);
-  }
-
-  template <typename T>
-  bool MatchAndExplain(T&& x, MatchResultListener* listener) const {
-    try {
-      (void)(std::forward<T>(x)());
-    } catch (const Err& err) {
-      *listener << "throws an exception which is a " << GetTypeName<Err>();
-      *listener << " ";
-      return matcher_.MatchAndExplain(err, listener);
-    } catch (DefaultExceptionType err) {
-#if GTEST_HAS_RTTI
-      *listener << "throws an exception of type " << GetTypeName(typeid(err));
-      *listener << " ";
-#else
-      *listener << "throws an std::exception-derived type ";
-#endif
-      *listener << "with description \"" << err.what() << "\"";
-      return false;
-    } catch (...) {
-      *listener << "throws an exception of an unknown type";
-      return false;
-    }
-
-    *listener << "does not throw any exception";
-    return false;
-  }
-
- private:
-  const Matcher<const Err&> matcher_;
-};
-
-}  // namespace internal
-
-// Throws()
-// Throws(exceptionMatcher)
-// ThrowsMessage(messageMatcher)
-//
-// This matcher accepts a callable and verifies that when invoked, it throws
-// an exception with the given type and properties.
-//
-// Examples:
-//
-//   EXPECT_THAT(
-//       []() { throw std::runtime_error("message"); },
-//       Throws<std::runtime_error>());
-//
-//   EXPECT_THAT(
-//       []() { throw std::runtime_error("message"); },
-//       ThrowsMessage<std::runtime_error>(HasSubstr("message")));
-//
-//   EXPECT_THAT(
-//       []() { throw std::runtime_error("message"); },
-//       Throws<std::runtime_error>(
-//           Property(&std::runtime_error::what, HasSubstr("message"))));
-
-template <typename Err>
-PolymorphicMatcher<internal::ExceptionMatcherImpl<Err>> Throws() {
-  return MakePolymorphicMatcher(
-      internal::ExceptionMatcherImpl<Err>(A<const Err&>()));
-}
-
-template <typename Err, typename ExceptionMatcher>
-PolymorphicMatcher<internal::ExceptionMatcherImpl<Err>> Throws(
-    const ExceptionMatcher& exception_matcher) {
-  // Using matcher cast allows users to pass a matcher of a more broad type.
-  // For example user may want to pass Matcher<std::exception>
-  // to Throws<std::runtime_error>, or Matcher<int64> to Throws<int32>.
-  return MakePolymorphicMatcher(internal::ExceptionMatcherImpl<Err>(
-      SafeMatcherCast<const Err&>(exception_matcher)));
-}
-
-template <typename Err, typename MessageMatcher>
-PolymorphicMatcher<internal::ExceptionMatcherImpl<Err>> ThrowsMessage(
-    MessageMatcher&& message_matcher) {
-  static_assert(std::is_base_of<std::exception, Err>::value,
-                "expected an std::exception-derived type");
-  return Throws<Err>(internal::WithWhat(
-      MatcherCast<std::string>(std::forward<MessageMatcher>(message_matcher))));
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// These macros allow using matchers to check values in Google Test
-// tests.  ASSERT_THAT(value, matcher) and EXPECT_THAT(value, matcher)
-// succeed if and only if the value matches the matcher.  If the assertion
-// fails, the value and the description of the matcher will be printed.
-#define ASSERT_THAT(value, matcher) ASSERT_PRED_FORMAT1(\
-    ::testing::internal::MakePredicateFormatterFromMatcher(matcher), value)
-#define EXPECT_THAT(value, matcher) EXPECT_PRED_FORMAT1(\
-    ::testing::internal::MakePredicateFormatterFromMatcher(matcher), value)
-
-// MATCHER* macroses itself are listed below.
-#define MATCHER(name, description)                                             \
-  class name##Matcher                                                          \
-      : public ::testing::internal::MatcherBaseImpl<name##Matcher> {           \
-   public:                                                                     \
-    template <typename arg_type>                                               \
-    class gmock_Impl : public ::testing::MatcherInterface<const arg_type&> {   \
-     public:                                                                   \
-      gmock_Impl() {}                                                          \
-      bool MatchAndExplain(                                                    \
-          const arg_type& arg,                                                 \
-          ::testing::MatchResultListener* result_listener) const override;     \
-      void DescribeTo(::std::ostream* gmock_os) const override {               \
-        *gmock_os << FormatDescription(false);                                 \
-      }                                                                        \
-      void DescribeNegationTo(::std::ostream* gmock_os) const override {       \
-        *gmock_os << FormatDescription(true);                                  \
-      }                                                                        \
-                                                                               \
-     private:                                                                  \
-      ::std::string FormatDescription(bool negation) const {                   \
-        ::std::string gmock_description = (description);                       \
-        if (!gmock_description.empty()) {                                      \
-          return gmock_description;                                            \
-        }                                                                      \
-        return ::testing::internal::FormatMatcherDescription(negation, #name,  \
-                                                             {});              \
-      }                                                                        \
-    };                                                                         \
-  };                                                                           \
-  GTEST_ATTRIBUTE_UNUSED_ inline name##Matcher name() { return {}; }           \
-  template <typename arg_type>                                                 \
-  bool name##Matcher::gmock_Impl<arg_type>::MatchAndExplain(                   \
-      const arg_type& arg,                                                     \
-      ::testing::MatchResultListener* result_listener GTEST_ATTRIBUTE_UNUSED_) \
-      const
-
-#define MATCHER_P(name, p0, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP, description, (p0))
-#define MATCHER_P2(name, p0, p1, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP2, description, (p0, p1))
-#define MATCHER_P3(name, p0, p1, p2, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP3, description, (p0, p1, p2))
-#define MATCHER_P4(name, p0, p1, p2, p3, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP4, description, (p0, p1, p2, p3))
-#define MATCHER_P5(name, p0, p1, p2, p3, p4, description)    \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP5, description, \
-                         (p0, p1, p2, p3, p4))
-#define MATCHER_P6(name, p0, p1, p2, p3, p4, p5, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP6, description,  \
-                         (p0, p1, p2, p3, p4, p5))
-#define MATCHER_P7(name, p0, p1, p2, p3, p4, p5, p6, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP7, description,      \
-                         (p0, p1, p2, p3, p4, p5, p6))
-#define MATCHER_P8(name, p0, p1, p2, p3, p4, p5, p6, p7, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP8, description,          \
-                         (p0, p1, p2, p3, p4, p5, p6, p7))
-#define MATCHER_P9(name, p0, p1, p2, p3, p4, p5, p6, p7, p8, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP9, description,              \
-                         (p0, p1, p2, p3, p4, p5, p6, p7, p8))
-#define MATCHER_P10(name, p0, p1, p2, p3, p4, p5, p6, p7, p8, p9, description) \
-  GMOCK_INTERNAL_MATCHER(name, name##MatcherP10, description,                  \
-                         (p0, p1, p2, p3, p4, p5, p6, p7, p8, p9))
-
-#define GMOCK_INTERNAL_MATCHER(name, full_name, description, args)             \
-  template <GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAMS(args)>                      \
-  class full_name : public ::testing::internal::MatcherBaseImpl<               \
-                        full_name<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)>> { \
-   public:                                                                     \
-    using full_name::MatcherBaseImpl::MatcherBaseImpl;                         \
-    template <typename arg_type>                                               \
-    class gmock_Impl : public ::testing::MatcherInterface<const arg_type&> {   \
-     public:                                                                   \
-      explicit gmock_Impl(GMOCK_INTERNAL_MATCHER_FUNCTION_ARGS(args))          \
-          : GMOCK_INTERNAL_MATCHER_FORWARD_ARGS(args) {}                       \
-      bool MatchAndExplain(                                                    \
-          const arg_type& arg,                                                 \
-          ::testing::MatchResultListener* result_listener) const override;     \
-      void DescribeTo(::std::ostream* gmock_os) const override {               \
-        *gmock_os << FormatDescription(false);                                 \
-      }                                                                        \
-      void DescribeNegationTo(::std::ostream* gmock_os) const override {       \
-        *gmock_os << FormatDescription(true);                                  \
-      }                                                                        \
-      GMOCK_INTERNAL_MATCHER_MEMBERS(args)                                     \
-                                                                               \
-     private:                                                                  \
-      ::std::string FormatDescription(bool negation) const {                   \
-        ::std::string gmock_description = (description);                       \
-        if (!gmock_description.empty()) {                                      \
-          return gmock_description;                                            \
-        }                                                                      \
-        return ::testing::internal::FormatMatcherDescription(                  \
-            negation, #name,                                                   \
-            ::testing::internal::UniversalTersePrintTupleFieldsToStrings(      \
-                ::std::tuple<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)>(        \
-                    GMOCK_INTERNAL_MATCHER_MEMBERS_USAGE(args))));             \
-      }                                                                        \
-    };                                                                         \
-  };                                                                           \
-  template <GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAMS(args)>                      \
-  inline full_name<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)> name(             \
-      GMOCK_INTERNAL_MATCHER_FUNCTION_ARGS(args)) {                            \
-    return full_name<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)>(                \
-        GMOCK_INTERNAL_MATCHER_ARGS_USAGE(args));                              \
-  }                                                                            \
-  template <GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAMS(args)>                      \
-  template <typename arg_type>                                                 \
-  bool full_name<GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args)>::gmock_Impl<        \
-      arg_type>::MatchAndExplain(const arg_type& arg,                          \
-                                 ::testing::MatchResultListener*               \
-                                     result_listener GTEST_ATTRIBUTE_UNUSED_)  \
-      const
-
-#define GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAMS(args) \
-  GMOCK_PP_TAIL(                                     \
-      GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAM, , args))
-#define GMOCK_INTERNAL_MATCHER_TEMPLATE_PARAM(i_unused, data_unused, arg) \
-  , typename arg##_type
-
-#define GMOCK_INTERNAL_MATCHER_TYPE_PARAMS(args) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_TYPE_PARAM, , args))
-#define GMOCK_INTERNAL_MATCHER_TYPE_PARAM(i_unused, data_unused, arg) \
-  , arg##_type
-
-#define GMOCK_INTERNAL_MATCHER_FUNCTION_ARGS(args) \
-  GMOCK_PP_TAIL(dummy_first GMOCK_PP_FOR_EACH(     \
-      GMOCK_INTERNAL_MATCHER_FUNCTION_ARG, , args))
-#define GMOCK_INTERNAL_MATCHER_FUNCTION_ARG(i, data_unused, arg) \
-  , arg##_type gmock_p##i
-
-#define GMOCK_INTERNAL_MATCHER_FORWARD_ARGS(args) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_FORWARD_ARG, , args))
-#define GMOCK_INTERNAL_MATCHER_FORWARD_ARG(i, data_unused, arg) \
-  , arg(::std::forward<arg##_type>(gmock_p##i))
-
-#define GMOCK_INTERNAL_MATCHER_MEMBERS(args) \
-  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_MEMBER, , args)
-#define GMOCK_INTERNAL_MATCHER_MEMBER(i_unused, data_unused, arg) \
-  const arg##_type arg;
-
-#define GMOCK_INTERNAL_MATCHER_MEMBERS_USAGE(args) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_MEMBER_USAGE, , args))
-#define GMOCK_INTERNAL_MATCHER_MEMBER_USAGE(i_unused, data_unused, arg) , arg
-
-#define GMOCK_INTERNAL_MATCHER_ARGS_USAGE(args) \
-  GMOCK_PP_TAIL(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_MATCHER_ARG_USAGE, , args))
-#define GMOCK_INTERNAL_MATCHER_ARG_USAGE(i, data_unused, arg_unused) \
-  , gmock_p##i
-
-// To prevent ADL on certain functions we put them on a separate namespace.
-using namespace no_adl;  // NOLINT
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251 5046
-
-// Include any custom callback matchers added by the local installation.
-// We must include this header at the end to make sure it can use the
-// declarations from this file.
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Injection point for custom user configurations. See README for details
-//
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_MATCHERS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_MATCHERS_H_
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_MATCHERS_H_
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MATCHERS_H_
-
-#if GTEST_HAS_EXCEPTIONS
-# include <stdexcept>  // NOLINT
-#endif
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// An abstract handle of an expectation.
-class Expectation;
-
-// A set of expectation handles.
-class ExpectationSet;
-
-// Anything inside the 'internal' namespace IS INTERNAL IMPLEMENTATION
-// and MUST NOT BE USED IN USER CODE!!!
-namespace internal {
-
-// Implements a mock function.
-template <typename F> class FunctionMocker;
-
-// Base class for expectations.
-class ExpectationBase;
-
-// Implements an expectation.
-template <typename F> class TypedExpectation;
-
-// Helper class for testing the Expectation class template.
-class ExpectationTester;
-
-// Helper classes for implementing NiceMock, StrictMock, and NaggyMock.
-template <typename MockClass>
-class NiceMockImpl;
-template <typename MockClass>
-class StrictMockImpl;
-template <typename MockClass>
-class NaggyMockImpl;
-
-// Protects the mock object registry (in class Mock), all function
-// mockers, and all expectations.
-//
-// The reason we don't use more fine-grained protection is: when a
-// mock function Foo() is called, it needs to consult its expectations
-// to see which one should be picked.  If another thread is allowed to
-// call a mock function (either Foo() or a different one) at the same
-// time, it could affect the "retired" attributes of Foo()'s
-// expectations when InSequence() is used, and thus affect which
-// expectation gets picked.  Therefore, we sequence all mock function
-// calls to ensure the integrity of the mock objects' states.
-GTEST_API_ GTEST_DECLARE_STATIC_MUTEX_(g_gmock_mutex);
-
-// Untyped base class for ActionResultHolder<R>.
-class UntypedActionResultHolderBase;
-
-// Abstract base class of FunctionMocker.  This is the
-// type-agnostic part of the function mocker interface.  Its pure
-// virtual methods are implemented by FunctionMocker.
-class GTEST_API_ UntypedFunctionMockerBase {
- public:
-  UntypedFunctionMockerBase();
-  virtual ~UntypedFunctionMockerBase();
-
-  // Verifies that all expectations on this mock function have been
-  // satisfied.  Reports one or more Google Test non-fatal failures
-  // and returns false if not.
-  bool VerifyAndClearExpectationsLocked()
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
-
-  // Clears the ON_CALL()s set on this mock function.
-  virtual void ClearDefaultActionsLocked()
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) = 0;
-
-  // In all of the following Untyped* functions, it's the caller's
-  // responsibility to guarantee the correctness of the arguments'
-  // types.
-
-  // Performs the default action with the given arguments and returns
-  // the action's result.  The call description string will be used in
-  // the error message to describe the call in the case the default
-  // action fails.
-  // L = *
-  virtual UntypedActionResultHolderBase* UntypedPerformDefaultAction(
-      void* untyped_args, const std::string& call_description) const = 0;
-
-  // Performs the given action with the given arguments and returns
-  // the action's result.
-  // L = *
-  virtual UntypedActionResultHolderBase* UntypedPerformAction(
-      const void* untyped_action, void* untyped_args) const = 0;
-
-  // Writes a message that the call is uninteresting (i.e. neither
-  // explicitly expected nor explicitly unexpected) to the given
-  // ostream.
-  virtual void UntypedDescribeUninterestingCall(
-      const void* untyped_args,
-      ::std::ostream* os) const
-          GTEST_LOCK_EXCLUDED_(g_gmock_mutex) = 0;
-
-  // Returns the expectation that matches the given function arguments
-  // (or NULL is there's no match); when a match is found,
-  // untyped_action is set to point to the action that should be
-  // performed (or NULL if the action is "do default"), and
-  // is_excessive is modified to indicate whether the call exceeds the
-  // expected number.
-  virtual const ExpectationBase* UntypedFindMatchingExpectation(
-      const void* untyped_args,
-      const void** untyped_action, bool* is_excessive,
-      ::std::ostream* what, ::std::ostream* why)
-          GTEST_LOCK_EXCLUDED_(g_gmock_mutex) = 0;
-
-  // Prints the given function arguments to the ostream.
-  virtual void UntypedPrintArgs(const void* untyped_args,
-                                ::std::ostream* os) const = 0;
-
-  // Sets the mock object this mock method belongs to, and registers
-  // this information in the global mock registry.  Will be called
-  // whenever an EXPECT_CALL() or ON_CALL() is executed on this mock
-  // method.
-  void RegisterOwner(const void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
-
-  // Sets the mock object this mock method belongs to, and sets the
-  // name of the mock function.  Will be called upon each invocation
-  // of this mock function.
-  void SetOwnerAndName(const void* mock_obj, const char* name)
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
-
-  // Returns the mock object this mock method belongs to.  Must be
-  // called after RegisterOwner() or SetOwnerAndName() has been
-  // called.
-  const void* MockObject() const
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
-
-  // Returns the name of this mock method.  Must be called after
-  // SetOwnerAndName() has been called.
-  const char* Name() const
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
-
-  // Returns the result of invoking this mock function with the given
-  // arguments.  This function can be safely called from multiple
-  // threads concurrently.  The caller is responsible for deleting the
-  // result.
-  UntypedActionResultHolderBase* UntypedInvokeWith(void* untyped_args)
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex);
-
- protected:
-  typedef std::vector<const void*> UntypedOnCallSpecs;
-
-  using UntypedExpectations = std::vector<std::shared_ptr<ExpectationBase>>;
-
-  // Returns an Expectation object that references and co-owns exp,
-  // which must be an expectation on this mock function.
-  Expectation GetHandleOf(ExpectationBase* exp);
-
-  // Address of the mock object this mock method belongs to.  Only
-  // valid after this mock method has been called or
-  // ON_CALL/EXPECT_CALL has been invoked on it.
-  const void* mock_obj_;  // Protected by g_gmock_mutex.
-
-  // Name of the function being mocked.  Only valid after this mock
-  // method has been called.
-  const char* name_;  // Protected by g_gmock_mutex.
-
-  // All default action specs for this function mocker.
-  UntypedOnCallSpecs untyped_on_call_specs_;
-
-  // All expectations for this function mocker.
-  //
-  // It's undefined behavior to interleave expectations (EXPECT_CALLs
-  // or ON_CALLs) and mock function calls.  Also, the order of
-  // expectations is important.  Therefore it's a logic race condition
-  // to read/write untyped_expectations_ concurrently.  In order for
-  // tools like tsan to catch concurrent read/write accesses to
-  // untyped_expectations, we deliberately leave accesses to it
-  // unprotected.
-  UntypedExpectations untyped_expectations_;
-};  // class UntypedFunctionMockerBase
-
-// Untyped base class for OnCallSpec<F>.
-class UntypedOnCallSpecBase {
- public:
-  // The arguments are the location of the ON_CALL() statement.
-  UntypedOnCallSpecBase(const char* a_file, int a_line)
-      : file_(a_file), line_(a_line), last_clause_(kNone) {}
-
-  // Where in the source file was the default action spec defined?
-  const char* file() const { return file_; }
-  int line() const { return line_; }
-
- protected:
-  // Gives each clause in the ON_CALL() statement a name.
-  enum Clause {
-    // Do not change the order of the enum members!  The run-time
-    // syntax checking relies on it.
-    kNone,
-    kWith,
-    kWillByDefault
-  };
-
-  // Asserts that the ON_CALL() statement has a certain property.
-  void AssertSpecProperty(bool property,
-                          const std::string& failure_message) const {
-    Assert(property, file_, line_, failure_message);
-  }
-
-  // Expects that the ON_CALL() statement has a certain property.
-  void ExpectSpecProperty(bool property,
-                          const std::string& failure_message) const {
-    Expect(property, file_, line_, failure_message);
-  }
-
-  const char* file_;
-  int line_;
-
-  // The last clause in the ON_CALL() statement as seen so far.
-  // Initially kNone and changes as the statement is parsed.
-  Clause last_clause_;
-};  // class UntypedOnCallSpecBase
-
-// This template class implements an ON_CALL spec.
-template <typename F>
-class OnCallSpec : public UntypedOnCallSpecBase {
- public:
-  typedef typename Function<F>::ArgumentTuple ArgumentTuple;
-  typedef typename Function<F>::ArgumentMatcherTuple ArgumentMatcherTuple;
-
-  // Constructs an OnCallSpec object from the information inside
-  // the parenthesis of an ON_CALL() statement.
-  OnCallSpec(const char* a_file, int a_line,
-             const ArgumentMatcherTuple& matchers)
-      : UntypedOnCallSpecBase(a_file, a_line),
-        matchers_(matchers),
-        // By default, extra_matcher_ should match anything.  However,
-        // we cannot initialize it with _ as that causes ambiguity between
-        // Matcher's copy and move constructor for some argument types.
-        extra_matcher_(A<const ArgumentTuple&>()) {}
-
-  // Implements the .With() clause.
-  OnCallSpec& With(const Matcher<const ArgumentTuple&>& m) {
-    // Makes sure this is called at most once.
-    ExpectSpecProperty(last_clause_ < kWith,
-                       ".With() cannot appear "
-                       "more than once in an ON_CALL().");
-    last_clause_ = kWith;
-
-    extra_matcher_ = m;
-    return *this;
-  }
-
-  // Implements the .WillByDefault() clause.
-  OnCallSpec& WillByDefault(const Action<F>& action) {
-    ExpectSpecProperty(last_clause_ < kWillByDefault,
-                       ".WillByDefault() must appear "
-                       "exactly once in an ON_CALL().");
-    last_clause_ = kWillByDefault;
-
-    ExpectSpecProperty(!action.IsDoDefault(),
-                       "DoDefault() cannot be used in ON_CALL().");
-    action_ = action;
-    return *this;
-  }
-
-  // Returns true if and only if the given arguments match the matchers.
-  bool Matches(const ArgumentTuple& args) const {
-    return TupleMatches(matchers_, args) && extra_matcher_.Matches(args);
-  }
-
-  // Returns the action specified by the user.
-  const Action<F>& GetAction() const {
-    AssertSpecProperty(last_clause_ == kWillByDefault,
-                       ".WillByDefault() must appear exactly "
-                       "once in an ON_CALL().");
-    return action_;
-  }
-
- private:
-  // The information in statement
-  //
-  //   ON_CALL(mock_object, Method(matchers))
-  //       .With(multi-argument-matcher)
-  //       .WillByDefault(action);
-  //
-  // is recorded in the data members like this:
-  //
-  //   source file that contains the statement => file_
-  //   line number of the statement            => line_
-  //   matchers                                => matchers_
-  //   multi-argument-matcher                  => extra_matcher_
-  //   action                                  => action_
-  ArgumentMatcherTuple matchers_;
-  Matcher<const ArgumentTuple&> extra_matcher_;
-  Action<F> action_;
-};  // class OnCallSpec
-
-// Possible reactions on uninteresting calls.
-enum CallReaction {
-  kAllow,
-  kWarn,
-  kFail,
-};
-
-}  // namespace internal
-
-// Utilities for manipulating mock objects.
-class GTEST_API_ Mock {
- public:
-  // The following public methods can be called concurrently.
-
-  // Tells Google Mock to ignore mock_obj when checking for leaked
-  // mock objects.
-  static void AllowLeak(const void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Verifies and clears all expectations on the given mock object.
-  // If the expectations aren't satisfied, generates one or more
-  // Google Test non-fatal failures and returns false.
-  static bool VerifyAndClearExpectations(void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Verifies all expectations on the given mock object and clears its
-  // default actions and expectations.  Returns true if and only if the
-  // verification was successful.
-  static bool VerifyAndClear(void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Returns whether the mock was created as a naggy mock (default)
-  static bool IsNaggy(void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-  // Returns whether the mock was created as a nice mock
-  static bool IsNice(void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-  // Returns whether the mock was created as a strict mock
-  static bool IsStrict(void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
- private:
-  friend class internal::UntypedFunctionMockerBase;
-
-  // Needed for a function mocker to register itself (so that we know
-  // how to clear a mock object).
-  template <typename F>
-  friend class internal::FunctionMocker;
-
-  template <typename MockClass>
-  friend class internal::NiceMockImpl;
-  template <typename MockClass>
-  friend class internal::NaggyMockImpl;
-  template <typename MockClass>
-  friend class internal::StrictMockImpl;
-
-  // Tells Google Mock to allow uninteresting calls on the given mock
-  // object.
-  static void AllowUninterestingCalls(const void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Tells Google Mock to warn the user about uninteresting calls on
-  // the given mock object.
-  static void WarnUninterestingCalls(const void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Tells Google Mock to fail uninteresting calls on the given mock
-  // object.
-  static void FailUninterestingCalls(const void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Tells Google Mock the given mock object is being destroyed and
-  // its entry in the call-reaction table should be removed.
-  static void UnregisterCallReaction(const void* mock_obj)
-      GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Returns the reaction Google Mock will have on uninteresting calls
-  // made on the given mock object.
-  static internal::CallReaction GetReactionOnUninterestingCalls(
-      const void* mock_obj)
-          GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Verifies that all expectations on the given mock object have been
-  // satisfied.  Reports one or more Google Test non-fatal failures
-  // and returns false if not.
-  static bool VerifyAndClearExpectationsLocked(void* mock_obj)
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex);
-
-  // Clears all ON_CALL()s set on the given mock object.
-  static void ClearDefaultActionsLocked(void* mock_obj)
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex);
-
-  // Registers a mock object and a mock method it owns.
-  static void Register(
-      const void* mock_obj,
-      internal::UntypedFunctionMockerBase* mocker)
-          GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Tells Google Mock where in the source code mock_obj is used in an
-  // ON_CALL or EXPECT_CALL.  In case mock_obj is leaked, this
-  // information helps the user identify which object it is.
-  static void RegisterUseByOnCallOrExpectCall(
-      const void* mock_obj, const char* file, int line)
-          GTEST_LOCK_EXCLUDED_(internal::g_gmock_mutex);
-
-  // Unregisters a mock method; removes the owning mock object from
-  // the registry when the last mock method associated with it has
-  // been unregistered.  This is called only in the destructor of
-  // FunctionMocker.
-  static void UnregisterLocked(internal::UntypedFunctionMockerBase* mocker)
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(internal::g_gmock_mutex);
-};  // class Mock
-
-// An abstract handle of an expectation.  Useful in the .After()
-// clause of EXPECT_CALL() for setting the (partial) order of
-// expectations.  The syntax:
-//
-//   Expectation e1 = EXPECT_CALL(...)...;
-//   EXPECT_CALL(...).After(e1)...;
-//
-// sets two expectations where the latter can only be matched after
-// the former has been satisfied.
-//
-// Notes:
-//   - This class is copyable and has value semantics.
-//   - Constness is shallow: a const Expectation object itself cannot
-//     be modified, but the mutable methods of the ExpectationBase
-//     object it references can be called via expectation_base().
-
-class GTEST_API_ Expectation {
- public:
-  // Constructs a null object that doesn't reference any expectation.
-  Expectation();
-  Expectation(Expectation&&) = default;
-  Expectation(const Expectation&) = default;
-  Expectation& operator=(Expectation&&) = default;
-  Expectation& operator=(const Expectation&) = default;
-  ~Expectation();
-
-  // This single-argument ctor must not be explicit, in order to support the
-  //   Expectation e = EXPECT_CALL(...);
-  // syntax.
-  //
-  // A TypedExpectation object stores its pre-requisites as
-  // Expectation objects, and needs to call the non-const Retire()
-  // method on the ExpectationBase objects they reference.  Therefore
-  // Expectation must receive a *non-const* reference to the
-  // ExpectationBase object.
-  Expectation(internal::ExpectationBase& exp);  // NOLINT
-
-  // The compiler-generated copy ctor and operator= work exactly as
-  // intended, so we don't need to define our own.
-
-  // Returns true if and only if rhs references the same expectation as this
-  // object does.
-  bool operator==(const Expectation& rhs) const {
-    return expectation_base_ == rhs.expectation_base_;
-  }
-
-  bool operator!=(const Expectation& rhs) const { return !(*this == rhs); }
-
- private:
-  friend class ExpectationSet;
-  friend class Sequence;
-  friend class ::testing::internal::ExpectationBase;
-  friend class ::testing::internal::UntypedFunctionMockerBase;
-
-  template <typename F>
-  friend class ::testing::internal::FunctionMocker;
-
-  template <typename F>
-  friend class ::testing::internal::TypedExpectation;
-
-  // This comparator is needed for putting Expectation objects into a set.
-  class Less {
-   public:
-    bool operator()(const Expectation& lhs, const Expectation& rhs) const {
-      return lhs.expectation_base_.get() < rhs.expectation_base_.get();
-    }
-  };
-
-  typedef ::std::set<Expectation, Less> Set;
-
-  Expectation(
-      const std::shared_ptr<internal::ExpectationBase>& expectation_base);
-
-  // Returns the expectation this object references.
-  const std::shared_ptr<internal::ExpectationBase>& expectation_base() const {
-    return expectation_base_;
-  }
-
-  // A shared_ptr that co-owns the expectation this handle references.
-  std::shared_ptr<internal::ExpectationBase> expectation_base_;
-};
-
-// A set of expectation handles.  Useful in the .After() clause of
-// EXPECT_CALL() for setting the (partial) order of expectations.  The
-// syntax:
-//
-//   ExpectationSet es;
-//   es += EXPECT_CALL(...)...;
-//   es += EXPECT_CALL(...)...;
-//   EXPECT_CALL(...).After(es)...;
-//
-// sets three expectations where the last one can only be matched
-// after the first two have both been satisfied.
-//
-// This class is copyable and has value semantics.
-class ExpectationSet {
- public:
-  // A bidirectional iterator that can read a const element in the set.
-  typedef Expectation::Set::const_iterator const_iterator;
-
-  // An object stored in the set.  This is an alias of Expectation.
-  typedef Expectation::Set::value_type value_type;
-
-  // Constructs an empty set.
-  ExpectationSet() {}
-
-  // This single-argument ctor must not be explicit, in order to support the
-  //   ExpectationSet es = EXPECT_CALL(...);
-  // syntax.
-  ExpectationSet(internal::ExpectationBase& exp) {  // NOLINT
-    *this += Expectation(exp);
-  }
-
-  // This single-argument ctor implements implicit conversion from
-  // Expectation and thus must not be explicit.  This allows either an
-  // Expectation or an ExpectationSet to be used in .After().
-  ExpectationSet(const Expectation& e) {  // NOLINT
-    *this += e;
-  }
-
-  // The compiler-generator ctor and operator= works exactly as
-  // intended, so we don't need to define our own.
-
-  // Returns true if and only if rhs contains the same set of Expectation
-  // objects as this does.
-  bool operator==(const ExpectationSet& rhs) const {
-    return expectations_ == rhs.expectations_;
-  }
-
-  bool operator!=(const ExpectationSet& rhs) const { return !(*this == rhs); }
-
-  // Implements the syntax
-  //   expectation_set += EXPECT_CALL(...);
-  ExpectationSet& operator+=(const Expectation& e) {
-    expectations_.insert(e);
-    return *this;
-  }
-
-  int size() const { return static_cast<int>(expectations_.size()); }
-
-  const_iterator begin() const { return expectations_.begin(); }
-  const_iterator end() const { return expectations_.end(); }
-
- private:
-  Expectation::Set expectations_;
-};
-
-
-// Sequence objects are used by a user to specify the relative order
-// in which the expectations should match.  They are copyable (we rely
-// on the compiler-defined copy constructor and assignment operator).
-class GTEST_API_ Sequence {
- public:
-  // Constructs an empty sequence.
-  Sequence() : last_expectation_(new Expectation) {}
-
-  // Adds an expectation to this sequence.  The caller must ensure
-  // that no other thread is accessing this Sequence object.
-  void AddExpectation(const Expectation& expectation) const;
-
- private:
-  // The last expectation in this sequence.
-  std::shared_ptr<Expectation> last_expectation_;
-};  // class Sequence
-
-// An object of this type causes all EXPECT_CALL() statements
-// encountered in its scope to be put in an anonymous sequence.  The
-// work is done in the constructor and destructor.  You should only
-// create an InSequence object on the stack.
-//
-// The sole purpose for this class is to support easy definition of
-// sequential expectations, e.g.
-//
-//   {
-//     InSequence dummy;  // The name of the object doesn't matter.
-//
-//     // The following expectations must match in the order they appear.
-//     EXPECT_CALL(a, Bar())...;
-//     EXPECT_CALL(a, Baz())...;
-//     ...
-//     EXPECT_CALL(b, Xyz())...;
-//   }
-//
-// You can create InSequence objects in multiple threads, as long as
-// they are used to affect different mock objects.  The idea is that
-// each thread can create and set up its own mocks as if it's the only
-// thread.  However, for clarity of your tests we recommend you to set
-// up mocks in the main thread unless you have a good reason not to do
-// so.
-class GTEST_API_ InSequence {
- public:
-  InSequence();
-  ~InSequence();
- private:
-  bool sequence_created_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(InSequence);  // NOLINT
-} GTEST_ATTRIBUTE_UNUSED_;
-
-namespace internal {
-
-// Points to the implicit sequence introduced by a living InSequence
-// object (if any) in the current thread or NULL.
-GTEST_API_ extern ThreadLocal<Sequence*> g_gmock_implicit_sequence;
-
-// Base class for implementing expectations.
-//
-// There are two reasons for having a type-agnostic base class for
-// Expectation:
-//
-//   1. We need to store collections of expectations of different
-//   types (e.g. all pre-requisites of a particular expectation, all
-//   expectations in a sequence).  Therefore these expectation objects
-//   must share a common base class.
-//
-//   2. We can avoid binary code bloat by moving methods not depending
-//   on the template argument of Expectation to the base class.
-//
-// This class is internal and mustn't be used by user code directly.
-class GTEST_API_ ExpectationBase {
- public:
-  // source_text is the EXPECT_CALL(...) source that created this Expectation.
-  ExpectationBase(const char* file, int line, const std::string& source_text);
-
-  virtual ~ExpectationBase();
-
-  // Where in the source file was the expectation spec defined?
-  const char* file() const { return file_; }
-  int line() const { return line_; }
-  const char* source_text() const { return source_text_.c_str(); }
-  // Returns the cardinality specified in the expectation spec.
-  const Cardinality& cardinality() const { return cardinality_; }
-
-  // Describes the source file location of this expectation.
-  void DescribeLocationTo(::std::ostream* os) const {
-    *os << FormatFileLocation(file(), line()) << " ";
-  }
-
-  // Describes how many times a function call matching this
-  // expectation has occurred.
-  void DescribeCallCountTo(::std::ostream* os) const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
-
-  // If this mock method has an extra matcher (i.e. .With(matcher)),
-  // describes it to the ostream.
-  virtual void MaybeDescribeExtraMatcherTo(::std::ostream* os) = 0;
-
- protected:
-  friend class ::testing::Expectation;
-  friend class UntypedFunctionMockerBase;
-
-  enum Clause {
-    // Don't change the order of the enum members!
-    kNone,
-    kWith,
-    kTimes,
-    kInSequence,
-    kAfter,
-    kWillOnce,
-    kWillRepeatedly,
-    kRetiresOnSaturation
-  };
-
-  typedef std::vector<const void*> UntypedActions;
-
-  // Returns an Expectation object that references and co-owns this
-  // expectation.
-  virtual Expectation GetHandle() = 0;
-
-  // Asserts that the EXPECT_CALL() statement has the given property.
-  void AssertSpecProperty(bool property,
-                          const std::string& failure_message) const {
-    Assert(property, file_, line_, failure_message);
-  }
-
-  // Expects that the EXPECT_CALL() statement has the given property.
-  void ExpectSpecProperty(bool property,
-                          const std::string& failure_message) const {
-    Expect(property, file_, line_, failure_message);
-  }
-
-  // Explicitly specifies the cardinality of this expectation.  Used
-  // by the subclasses to implement the .Times() clause.
-  void SpecifyCardinality(const Cardinality& cardinality);
-
-  // Returns true if and only if the user specified the cardinality
-  // explicitly using a .Times().
-  bool cardinality_specified() const { return cardinality_specified_; }
-
-  // Sets the cardinality of this expectation spec.
-  void set_cardinality(const Cardinality& a_cardinality) {
-    cardinality_ = a_cardinality;
-  }
-
-  // The following group of methods should only be called after the
-  // EXPECT_CALL() statement, and only when g_gmock_mutex is held by
-  // the current thread.
-
-  // Retires all pre-requisites of this expectation.
-  void RetireAllPreRequisites()
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
-
-  // Returns true if and only if this expectation is retired.
-  bool is_retired() const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    return retired_;
-  }
-
-  // Retires this expectation.
-  void Retire()
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    retired_ = true;
-  }
-
-  // Returns true if and only if this expectation is satisfied.
-  bool IsSatisfied() const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    return cardinality().IsSatisfiedByCallCount(call_count_);
-  }
-
-  // Returns true if and only if this expectation is saturated.
-  bool IsSaturated() const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    return cardinality().IsSaturatedByCallCount(call_count_);
-  }
-
-  // Returns true if and only if this expectation is over-saturated.
-  bool IsOverSaturated() const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    return cardinality().IsOverSaturatedByCallCount(call_count_);
-  }
-
-  // Returns true if and only if all pre-requisites of this expectation are
-  // satisfied.
-  bool AllPrerequisitesAreSatisfied() const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
-
-  // Adds unsatisfied pre-requisites of this expectation to 'result'.
-  void FindUnsatisfiedPrerequisites(ExpectationSet* result) const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex);
-
-  // Returns the number this expectation has been invoked.
-  int call_count() const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    return call_count_;
-  }
-
-  // Increments the number this expectation has been invoked.
-  void IncrementCallCount()
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    call_count_++;
-  }
-
-  // Checks the action count (i.e. the number of WillOnce() and
-  // WillRepeatedly() clauses) against the cardinality if this hasn't
-  // been done before.  Prints a warning if there are too many or too
-  // few actions.
-  void CheckActionCountIfNotDone() const
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  friend class ::testing::Sequence;
-  friend class ::testing::internal::ExpectationTester;
-
-  template <typename Function>
-  friend class TypedExpectation;
-
-  // Implements the .Times() clause.
-  void UntypedTimes(const Cardinality& a_cardinality);
-
-  // This group of fields are part of the spec and won't change after
-  // an EXPECT_CALL() statement finishes.
-  const char* file_;          // The file that contains the expectation.
-  int line_;                  // The line number of the expectation.
-  const std::string source_text_;  // The EXPECT_CALL(...) source text.
-  // True if and only if the cardinality is specified explicitly.
-  bool cardinality_specified_;
-  Cardinality cardinality_;            // The cardinality of the expectation.
-  // The immediate pre-requisites (i.e. expectations that must be
-  // satisfied before this expectation can be matched) of this
-  // expectation.  We use std::shared_ptr in the set because we want an
-  // Expectation object to be co-owned by its FunctionMocker and its
-  // successors.  This allows multiple mock objects to be deleted at
-  // different times.
-  ExpectationSet immediate_prerequisites_;
-
-  // This group of fields are the current state of the expectation,
-  // and can change as the mock function is called.
-  int call_count_;  // How many times this expectation has been invoked.
-  bool retired_;    // True if and only if this expectation has retired.
-  UntypedActions untyped_actions_;
-  bool extra_matcher_specified_;
-  bool repeated_action_specified_;  // True if a WillRepeatedly() was specified.
-  bool retires_on_saturation_;
-  Clause last_clause_;
-  mutable bool action_count_checked_;  // Under mutex_.
-  mutable Mutex mutex_;  // Protects action_count_checked_.
-};  // class ExpectationBase
-
-// Impements an expectation for the given function type.
-template <typename F>
-class TypedExpectation : public ExpectationBase {
- public:
-  typedef typename Function<F>::ArgumentTuple ArgumentTuple;
-  typedef typename Function<F>::ArgumentMatcherTuple ArgumentMatcherTuple;
-  typedef typename Function<F>::Result Result;
-
-  TypedExpectation(FunctionMocker<F>* owner, const char* a_file, int a_line,
-                   const std::string& a_source_text,
-                   const ArgumentMatcherTuple& m)
-      : ExpectationBase(a_file, a_line, a_source_text),
-        owner_(owner),
-        matchers_(m),
-        // By default, extra_matcher_ should match anything.  However,
-        // we cannot initialize it with _ as that causes ambiguity between
-        // Matcher's copy and move constructor for some argument types.
-        extra_matcher_(A<const ArgumentTuple&>()),
-        repeated_action_(DoDefault()) {}
-
-  ~TypedExpectation() override {
-    // Check the validity of the action count if it hasn't been done
-    // yet (for example, if the expectation was never used).
-    CheckActionCountIfNotDone();
-    for (UntypedActions::const_iterator it = untyped_actions_.begin();
-         it != untyped_actions_.end(); ++it) {
-      delete static_cast<const Action<F>*>(*it);
-    }
-  }
-
-  // Implements the .With() clause.
-  TypedExpectation& With(const Matcher<const ArgumentTuple&>& m) {
-    if (last_clause_ == kWith) {
-      ExpectSpecProperty(false,
-                         ".With() cannot appear "
-                         "more than once in an EXPECT_CALL().");
-    } else {
-      ExpectSpecProperty(last_clause_ < kWith,
-                         ".With() must be the first "
-                         "clause in an EXPECT_CALL().");
-    }
-    last_clause_ = kWith;
-
-    extra_matcher_ = m;
-    extra_matcher_specified_ = true;
-    return *this;
-  }
-
-  // Implements the .Times() clause.
-  TypedExpectation& Times(const Cardinality& a_cardinality) {
-    ExpectationBase::UntypedTimes(a_cardinality);
-    return *this;
-  }
-
-  // Implements the .Times() clause.
-  TypedExpectation& Times(int n) {
-    return Times(Exactly(n));
-  }
-
-  // Implements the .InSequence() clause.
-  TypedExpectation& InSequence(const Sequence& s) {
-    ExpectSpecProperty(last_clause_ <= kInSequence,
-                       ".InSequence() cannot appear after .After(),"
-                       " .WillOnce(), .WillRepeatedly(), or "
-                       ".RetiresOnSaturation().");
-    last_clause_ = kInSequence;
-
-    s.AddExpectation(GetHandle());
-    return *this;
-  }
-  TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2) {
-    return InSequence(s1).InSequence(s2);
-  }
-  TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2,
-                               const Sequence& s3) {
-    return InSequence(s1, s2).InSequence(s3);
-  }
-  TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2,
-                               const Sequence& s3, const Sequence& s4) {
-    return InSequence(s1, s2, s3).InSequence(s4);
-  }
-  TypedExpectation& InSequence(const Sequence& s1, const Sequence& s2,
-                               const Sequence& s3, const Sequence& s4,
-                               const Sequence& s5) {
-    return InSequence(s1, s2, s3, s4).InSequence(s5);
-  }
-
-  // Implements that .After() clause.
-  TypedExpectation& After(const ExpectationSet& s) {
-    ExpectSpecProperty(last_clause_ <= kAfter,
-                       ".After() cannot appear after .WillOnce(),"
-                       " .WillRepeatedly(), or "
-                       ".RetiresOnSaturation().");
-    last_clause_ = kAfter;
-
-    for (ExpectationSet::const_iterator it = s.begin(); it != s.end(); ++it) {
-      immediate_prerequisites_ += *it;
-    }
-    return *this;
-  }
-  TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2) {
-    return After(s1).After(s2);
-  }
-  TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2,
-                          const ExpectationSet& s3) {
-    return After(s1, s2).After(s3);
-  }
-  TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2,
-                          const ExpectationSet& s3, const ExpectationSet& s4) {
-    return After(s1, s2, s3).After(s4);
-  }
-  TypedExpectation& After(const ExpectationSet& s1, const ExpectationSet& s2,
-                          const ExpectationSet& s3, const ExpectationSet& s4,
-                          const ExpectationSet& s5) {
-    return After(s1, s2, s3, s4).After(s5);
-  }
-
-  // Implements the .WillOnce() clause.
-  TypedExpectation& WillOnce(const Action<F>& action) {
-    ExpectSpecProperty(last_clause_ <= kWillOnce,
-                       ".WillOnce() cannot appear after "
-                       ".WillRepeatedly() or .RetiresOnSaturation().");
-    last_clause_ = kWillOnce;
-
-    untyped_actions_.push_back(new Action<F>(action));
-    if (!cardinality_specified()) {
-      set_cardinality(Exactly(static_cast<int>(untyped_actions_.size())));
-    }
-    return *this;
-  }
-
-  // Implements the .WillRepeatedly() clause.
-  TypedExpectation& WillRepeatedly(const Action<F>& action) {
-    if (last_clause_ == kWillRepeatedly) {
-      ExpectSpecProperty(false,
-                         ".WillRepeatedly() cannot appear "
-                         "more than once in an EXPECT_CALL().");
-    } else {
-      ExpectSpecProperty(last_clause_ < kWillRepeatedly,
-                         ".WillRepeatedly() cannot appear "
-                         "after .RetiresOnSaturation().");
-    }
-    last_clause_ = kWillRepeatedly;
-    repeated_action_specified_ = true;
-
-    repeated_action_ = action;
-    if (!cardinality_specified()) {
-      set_cardinality(AtLeast(static_cast<int>(untyped_actions_.size())));
-    }
-
-    // Now that no more action clauses can be specified, we check
-    // whether their count makes sense.
-    CheckActionCountIfNotDone();
-    return *this;
-  }
-
-  // Implements the .RetiresOnSaturation() clause.
-  TypedExpectation& RetiresOnSaturation() {
-    ExpectSpecProperty(last_clause_ < kRetiresOnSaturation,
-                       ".RetiresOnSaturation() cannot appear "
-                       "more than once.");
-    last_clause_ = kRetiresOnSaturation;
-    retires_on_saturation_ = true;
-
-    // Now that no more action clauses can be specified, we check
-    // whether their count makes sense.
-    CheckActionCountIfNotDone();
-    return *this;
-  }
-
-  // Returns the matchers for the arguments as specified inside the
-  // EXPECT_CALL() macro.
-  const ArgumentMatcherTuple& matchers() const {
-    return matchers_;
-  }
-
-  // Returns the matcher specified by the .With() clause.
-  const Matcher<const ArgumentTuple&>& extra_matcher() const {
-    return extra_matcher_;
-  }
-
-  // Returns the action specified by the .WillRepeatedly() clause.
-  const Action<F>& repeated_action() const { return repeated_action_; }
-
-  // If this mock method has an extra matcher (i.e. .With(matcher)),
-  // describes it to the ostream.
-  void MaybeDescribeExtraMatcherTo(::std::ostream* os) override {
-    if (extra_matcher_specified_) {
-      *os << "    Expected args: ";
-      extra_matcher_.DescribeTo(os);
-      *os << "\n";
-    }
-  }
-
- private:
-  template <typename Function>
-  friend class FunctionMocker;
-
-  // Returns an Expectation object that references and co-owns this
-  // expectation.
-  Expectation GetHandle() override { return owner_->GetHandleOf(this); }
-
-  // The following methods will be called only after the EXPECT_CALL()
-  // statement finishes and when the current thread holds
-  // g_gmock_mutex.
-
-  // Returns true if and only if this expectation matches the given arguments.
-  bool Matches(const ArgumentTuple& args) const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    return TupleMatches(matchers_, args) && extra_matcher_.Matches(args);
-  }
-
-  // Returns true if and only if this expectation should handle the given
-  // arguments.
-  bool ShouldHandleArguments(const ArgumentTuple& args) const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-
-    // In case the action count wasn't checked when the expectation
-    // was defined (e.g. if this expectation has no WillRepeatedly()
-    // or RetiresOnSaturation() clause), we check it when the
-    // expectation is used for the first time.
-    CheckActionCountIfNotDone();
-    return !is_retired() && AllPrerequisitesAreSatisfied() && Matches(args);
-  }
-
-  // Describes the result of matching the arguments against this
-  // expectation to the given ostream.
-  void ExplainMatchResultTo(
-      const ArgumentTuple& args,
-      ::std::ostream* os) const
-          GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-
-    if (is_retired()) {
-      *os << "         Expected: the expectation is active\n"
-          << "           Actual: it is retired\n";
-    } else if (!Matches(args)) {
-      if (!TupleMatches(matchers_, args)) {
-        ExplainMatchFailureTupleTo(matchers_, args, os);
-      }
-      StringMatchResultListener listener;
-      if (!extra_matcher_.MatchAndExplain(args, &listener)) {
-        *os << "    Expected args: ";
-        extra_matcher_.DescribeTo(os);
-        *os << "\n           Actual: don't match";
-
-        internal::PrintIfNotEmpty(listener.str(), os);
-        *os << "\n";
-      }
-    } else if (!AllPrerequisitesAreSatisfied()) {
-      *os << "         Expected: all pre-requisites are satisfied\n"
-          << "           Actual: the following immediate pre-requisites "
-          << "are not satisfied:\n";
-      ExpectationSet unsatisfied_prereqs;
-      FindUnsatisfiedPrerequisites(&unsatisfied_prereqs);
-      int i = 0;
-      for (ExpectationSet::const_iterator it = unsatisfied_prereqs.begin();
-           it != unsatisfied_prereqs.end(); ++it) {
-        it->expectation_base()->DescribeLocationTo(os);
-        *os << "pre-requisite #" << i++ << "\n";
-      }
-      *os << "                   (end of pre-requisites)\n";
-    } else {
-      // This line is here just for completeness' sake.  It will never
-      // be executed as currently the ExplainMatchResultTo() function
-      // is called only when the mock function call does NOT match the
-      // expectation.
-      *os << "The call matches the expectation.\n";
-    }
-  }
-
-  // Returns the action that should be taken for the current invocation.
-  const Action<F>& GetCurrentAction(const FunctionMocker<F>* mocker,
-                                    const ArgumentTuple& args) const
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    const int count = call_count();
-    Assert(count >= 1, __FILE__, __LINE__,
-           "call_count() is <= 0 when GetCurrentAction() is "
-           "called - this should never happen.");
-
-    const int action_count = static_cast<int>(untyped_actions_.size());
-    if (action_count > 0 && !repeated_action_specified_ &&
-        count > action_count) {
-      // If there is at least one WillOnce() and no WillRepeatedly(),
-      // we warn the user when the WillOnce() clauses ran out.
-      ::std::stringstream ss;
-      DescribeLocationTo(&ss);
-      ss << "Actions ran out in " << source_text() << "...\n"
-         << "Called " << count << " times, but only "
-         << action_count << " WillOnce()"
-         << (action_count == 1 ? " is" : "s are") << " specified - ";
-      mocker->DescribeDefaultActionTo(args, &ss);
-      Log(kWarning, ss.str(), 1);
-    }
-
-    return count <= action_count
-               ? *static_cast<const Action<F>*>(
-                     untyped_actions_[static_cast<size_t>(count - 1)])
-               : repeated_action();
-  }
-
-  // Given the arguments of a mock function call, if the call will
-  // over-saturate this expectation, returns the default action;
-  // otherwise, returns the next action in this expectation.  Also
-  // describes *what* happened to 'what', and explains *why* Google
-  // Mock does it to 'why'.  This method is not const as it calls
-  // IncrementCallCount().  A return value of NULL means the default
-  // action.
-  const Action<F>* GetActionForArguments(const FunctionMocker<F>* mocker,
-                                         const ArgumentTuple& args,
-                                         ::std::ostream* what,
-                                         ::std::ostream* why)
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    if (IsSaturated()) {
-      // We have an excessive call.
-      IncrementCallCount();
-      *what << "Mock function called more times than expected - ";
-      mocker->DescribeDefaultActionTo(args, what);
-      DescribeCallCountTo(why);
-
-      return nullptr;
-    }
-
-    IncrementCallCount();
-    RetireAllPreRequisites();
-
-    if (retires_on_saturation_ && IsSaturated()) {
-      Retire();
-    }
-
-    // Must be done after IncrementCount()!
-    *what << "Mock function call matches " << source_text() <<"...\n";
-    return &(GetCurrentAction(mocker, args));
-  }
-
-  // All the fields below won't change once the EXPECT_CALL()
-  // statement finishes.
-  FunctionMocker<F>* const owner_;
-  ArgumentMatcherTuple matchers_;
-  Matcher<const ArgumentTuple&> extra_matcher_;
-  Action<F> repeated_action_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TypedExpectation);
-};  // class TypedExpectation
-
-// A MockSpec object is used by ON_CALL() or EXPECT_CALL() for
-// specifying the default behavior of, or expectation on, a mock
-// function.
-
-// Note: class MockSpec really belongs to the ::testing namespace.
-// However if we define it in ::testing, MSVC will complain when
-// classes in ::testing::internal declare it as a friend class
-// template.  To workaround this compiler bug, we define MockSpec in
-// ::testing::internal and import it into ::testing.
-
-// Logs a message including file and line number information.
-GTEST_API_ void LogWithLocation(testing::internal::LogSeverity severity,
-                                const char* file, int line,
-                                const std::string& message);
-
-template <typename F>
-class MockSpec {
- public:
-  typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
-  typedef typename internal::Function<F>::ArgumentMatcherTuple
-      ArgumentMatcherTuple;
-
-  // Constructs a MockSpec object, given the function mocker object
-  // that the spec is associated with.
-  MockSpec(internal::FunctionMocker<F>* function_mocker,
-           const ArgumentMatcherTuple& matchers)
-      : function_mocker_(function_mocker), matchers_(matchers) {}
-
-  // Adds a new default action spec to the function mocker and returns
-  // the newly created spec.
-  internal::OnCallSpec<F>& InternalDefaultActionSetAt(
-      const char* file, int line, const char* obj, const char* call) {
-    LogWithLocation(internal::kInfo, file, line,
-                    std::string("ON_CALL(") + obj + ", " + call + ") invoked");
-    return function_mocker_->AddNewOnCallSpec(file, line, matchers_);
-  }
-
-  // Adds a new expectation spec to the function mocker and returns
-  // the newly created spec.
-  internal::TypedExpectation<F>& InternalExpectedAt(
-      const char* file, int line, const char* obj, const char* call) {
-    const std::string source_text(std::string("EXPECT_CALL(") + obj + ", " +
-                                  call + ")");
-    LogWithLocation(internal::kInfo, file, line, source_text + " invoked");
-    return function_mocker_->AddNewExpectation(
-        file, line, source_text, matchers_);
-  }
-
-  // This operator overload is used to swallow the superfluous parameter list
-  // introduced by the ON/EXPECT_CALL macros. See the macro comments for more
-  // explanation.
-  MockSpec<F>& operator()(const internal::WithoutMatchers&, void* const) {
-    return *this;
-  }
-
- private:
-  template <typename Function>
-  friend class internal::FunctionMocker;
-
-  // The function mocker that owns this spec.
-  internal::FunctionMocker<F>* const function_mocker_;
-  // The argument matchers specified in the spec.
-  ArgumentMatcherTuple matchers_;
-};  // class MockSpec
-
-// Wrapper type for generically holding an ordinary value or lvalue reference.
-// If T is not a reference type, it must be copyable or movable.
-// ReferenceOrValueWrapper<T> is movable, and will also be copyable unless
-// T is a move-only value type (which means that it will always be copyable
-// if the current platform does not support move semantics).
-//
-// The primary template defines handling for values, but function header
-// comments describe the contract for the whole template (including
-// specializations).
-template <typename T>
-class ReferenceOrValueWrapper {
- public:
-  // Constructs a wrapper from the given value/reference.
-  explicit ReferenceOrValueWrapper(T value)
-      : value_(std::move(value)) {
-  }
-
-  // Unwraps and returns the underlying value/reference, exactly as
-  // originally passed. The behavior of calling this more than once on
-  // the same object is unspecified.
-  T Unwrap() { return std::move(value_); }
-
-  // Provides nondestructive access to the underlying value/reference.
-  // Always returns a const reference (more precisely,
-  // const std::add_lvalue_reference<T>::type). The behavior of calling this
-  // after calling Unwrap on the same object is unspecified.
-  const T& Peek() const {
-    return value_;
-  }
-
- private:
-  T value_;
-};
-
-// Specialization for lvalue reference types. See primary template
-// for documentation.
-template <typename T>
-class ReferenceOrValueWrapper<T&> {
- public:
-  // Workaround for debatable pass-by-reference lint warning (c-library-team
-  // policy precludes NOLINT in this context)
-  typedef T& reference;
-  explicit ReferenceOrValueWrapper(reference ref)
-      : value_ptr_(&ref) {}
-  T& Unwrap() { return *value_ptr_; }
-  const T& Peek() const { return *value_ptr_; }
-
- private:
-  T* value_ptr_;
-};
-
-// C++ treats the void type specially.  For example, you cannot define
-// a void-typed variable or pass a void value to a function.
-// ActionResultHolder<T> holds a value of type T, where T must be a
-// copyable type or void (T doesn't need to be default-constructable).
-// It hides the syntactic difference between void and other types, and
-// is used to unify the code for invoking both void-returning and
-// non-void-returning mock functions.
-
-// Untyped base class for ActionResultHolder<T>.
-class UntypedActionResultHolderBase {
- public:
-  virtual ~UntypedActionResultHolderBase() {}
-
-  // Prints the held value as an action's result to os.
-  virtual void PrintAsActionResult(::std::ostream* os) const = 0;
-};
-
-// This generic definition is used when T is not void.
-template <typename T>
-class ActionResultHolder : public UntypedActionResultHolderBase {
- public:
-  // Returns the held value. Must not be called more than once.
-  T Unwrap() {
-    return result_.Unwrap();
-  }
-
-  // Prints the held value as an action's result to os.
-  void PrintAsActionResult(::std::ostream* os) const override {
-    *os << "\n          Returns: ";
-    // T may be a reference type, so we don't use UniversalPrint().
-    UniversalPrinter<T>::Print(result_.Peek(), os);
-  }
-
-  // Performs the given mock function's default action and returns the
-  // result in a new-ed ActionResultHolder.
-  template <typename F>
-  static ActionResultHolder* PerformDefaultAction(
-      const FunctionMocker<F>* func_mocker,
-      typename Function<F>::ArgumentTuple&& args,
-      const std::string& call_description) {
-    return new ActionResultHolder(Wrapper(func_mocker->PerformDefaultAction(
-        std::move(args), call_description)));
-  }
-
-  // Performs the given action and returns the result in a new-ed
-  // ActionResultHolder.
-  template <typename F>
-  static ActionResultHolder* PerformAction(
-      const Action<F>& action, typename Function<F>::ArgumentTuple&& args) {
-    return new ActionResultHolder(
-        Wrapper(action.Perform(std::move(args))));
-  }
-
- private:
-  typedef ReferenceOrValueWrapper<T> Wrapper;
-
-  explicit ActionResultHolder(Wrapper result)
-      : result_(std::move(result)) {
-  }
-
-  Wrapper result_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ActionResultHolder);
-};
-
-// Specialization for T = void.
-template <>
-class ActionResultHolder<void> : public UntypedActionResultHolderBase {
- public:
-  void Unwrap() { }
-
-  void PrintAsActionResult(::std::ostream* /* os */) const override {}
-
-  // Performs the given mock function's default action and returns ownership
-  // of an empty ActionResultHolder*.
-  template <typename F>
-  static ActionResultHolder* PerformDefaultAction(
-      const FunctionMocker<F>* func_mocker,
-      typename Function<F>::ArgumentTuple&& args,
-      const std::string& call_description) {
-    func_mocker->PerformDefaultAction(std::move(args), call_description);
-    return new ActionResultHolder;
-  }
-
-  // Performs the given action and returns ownership of an empty
-  // ActionResultHolder*.
-  template <typename F>
-  static ActionResultHolder* PerformAction(
-      const Action<F>& action, typename Function<F>::ArgumentTuple&& args) {
-    action.Perform(std::move(args));
-    return new ActionResultHolder;
-  }
-
- private:
-  ActionResultHolder() {}
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ActionResultHolder);
-};
-
-template <typename F>
-class FunctionMocker;
-
-template <typename R, typename... Args>
-class FunctionMocker<R(Args...)> final : public UntypedFunctionMockerBase {
-  using F = R(Args...);
-
- public:
-  using Result = R;
-  using ArgumentTuple = std::tuple<Args...>;
-  using ArgumentMatcherTuple = std::tuple<Matcher<Args>...>;
-
-  FunctionMocker() {}
-
-  // There is no generally useful and implementable semantics of
-  // copying a mock object, so copying a mock is usually a user error.
-  // Thus we disallow copying function mockers.  If the user really
-  // wants to copy a mock object, they should implement their own copy
-  // operation, for example:
-  //
-  //   class MockFoo : public Foo {
-  //    public:
-  //     // Defines a copy constructor explicitly.
-  //     MockFoo(const MockFoo& src) {}
-  //     ...
-  //   };
-  FunctionMocker(const FunctionMocker&) = delete;
-  FunctionMocker& operator=(const FunctionMocker&) = delete;
-
-  // The destructor verifies that all expectations on this mock
-  // function have been satisfied.  If not, it will report Google Test
-  // non-fatal failures for the violations.
-  ~FunctionMocker() override GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-    MutexLock l(&g_gmock_mutex);
-    VerifyAndClearExpectationsLocked();
-    Mock::UnregisterLocked(this);
-    ClearDefaultActionsLocked();
-  }
-
-  // Returns the ON_CALL spec that matches this mock function with the
-  // given arguments; returns NULL if no matching ON_CALL is found.
-  // L = *
-  const OnCallSpec<F>* FindOnCallSpec(
-      const ArgumentTuple& args) const {
-    for (UntypedOnCallSpecs::const_reverse_iterator it
-             = untyped_on_call_specs_.rbegin();
-         it != untyped_on_call_specs_.rend(); ++it) {
-      const OnCallSpec<F>* spec = static_cast<const OnCallSpec<F>*>(*it);
-      if (spec->Matches(args))
-        return spec;
-    }
-
-    return nullptr;
-  }
-
-  // Performs the default action of this mock function on the given
-  // arguments and returns the result. Asserts (or throws if
-  // exceptions are enabled) with a helpful call descrption if there
-  // is no valid return value. This method doesn't depend on the
-  // mutable state of this object, and thus can be called concurrently
-  // without locking.
-  // L = *
-  Result PerformDefaultAction(ArgumentTuple&& args,
-                              const std::string& call_description) const {
-    const OnCallSpec<F>* const spec =
-        this->FindOnCallSpec(args);
-    if (spec != nullptr) {
-      return spec->GetAction().Perform(std::move(args));
-    }
-    const std::string message =
-        call_description +
-        "\n    The mock function has no default action "
-        "set, and its return type has no default value set.";
-#if GTEST_HAS_EXCEPTIONS
-    if (!DefaultValue<Result>::Exists()) {
-      throw std::runtime_error(message);
-    }
-#else
-    Assert(DefaultValue<Result>::Exists(), "", -1, message);
-#endif
-    return DefaultValue<Result>::Get();
-  }
-
-  // Performs the default action with the given arguments and returns
-  // the action's result.  The call description string will be used in
-  // the error message to describe the call in the case the default
-  // action fails.  The caller is responsible for deleting the result.
-  // L = *
-  UntypedActionResultHolderBase* UntypedPerformDefaultAction(
-      void* untyped_args,  // must point to an ArgumentTuple
-      const std::string& call_description) const override {
-    ArgumentTuple* args = static_cast<ArgumentTuple*>(untyped_args);
-    return ResultHolder::PerformDefaultAction(this, std::move(*args),
-                                              call_description);
-  }
-
-  // Performs the given action with the given arguments and returns
-  // the action's result.  The caller is responsible for deleting the
-  // result.
-  // L = *
-  UntypedActionResultHolderBase* UntypedPerformAction(
-      const void* untyped_action, void* untyped_args) const override {
-    // Make a copy of the action before performing it, in case the
-    // action deletes the mock object (and thus deletes itself).
-    const Action<F> action = *static_cast<const Action<F>*>(untyped_action);
-    ArgumentTuple* args = static_cast<ArgumentTuple*>(untyped_args);
-    return ResultHolder::PerformAction(action, std::move(*args));
-  }
-
-  // Implements UntypedFunctionMockerBase::ClearDefaultActionsLocked():
-  // clears the ON_CALL()s set on this mock function.
-  void ClearDefaultActionsLocked() override
-      GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-
-    // Deleting our default actions may trigger other mock objects to be
-    // deleted, for example if an action contains a reference counted smart
-    // pointer to that mock object, and that is the last reference. So if we
-    // delete our actions within the context of the global mutex we may deadlock
-    // when this method is called again. Instead, make a copy of the set of
-    // actions to delete, clear our set within the mutex, and then delete the
-    // actions outside of the mutex.
-    UntypedOnCallSpecs specs_to_delete;
-    untyped_on_call_specs_.swap(specs_to_delete);
-
-    g_gmock_mutex.Unlock();
-    for (UntypedOnCallSpecs::const_iterator it =
-             specs_to_delete.begin();
-         it != specs_to_delete.end(); ++it) {
-      delete static_cast<const OnCallSpec<F>*>(*it);
-    }
-
-    // Lock the mutex again, since the caller expects it to be locked when we
-    // return.
-    g_gmock_mutex.Lock();
-  }
-
-  // Returns the result of invoking this mock function with the given
-  // arguments.  This function can be safely called from multiple
-  // threads concurrently.
-  Result Invoke(Args... args) GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-    ArgumentTuple tuple(std::forward<Args>(args)...);
-    std::unique_ptr<ResultHolder> holder(DownCast_<ResultHolder*>(
-        this->UntypedInvokeWith(static_cast<void*>(&tuple))));
-    return holder->Unwrap();
-  }
-
-  MockSpec<F> With(Matcher<Args>... m) {
-    return MockSpec<F>(this, ::std::make_tuple(std::move(m)...));
-  }
-
- protected:
-  template <typename Function>
-  friend class MockSpec;
-
-  typedef ActionResultHolder<Result> ResultHolder;
-
-  // Adds and returns a default action spec for this mock function.
-  OnCallSpec<F>& AddNewOnCallSpec(
-      const char* file, int line,
-      const ArgumentMatcherTuple& m)
-          GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-    Mock::RegisterUseByOnCallOrExpectCall(MockObject(), file, line);
-    OnCallSpec<F>* const on_call_spec = new OnCallSpec<F>(file, line, m);
-    untyped_on_call_specs_.push_back(on_call_spec);
-    return *on_call_spec;
-  }
-
-  // Adds and returns an expectation spec for this mock function.
-  TypedExpectation<F>& AddNewExpectation(const char* file, int line,
-                                         const std::string& source_text,
-                                         const ArgumentMatcherTuple& m)
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-    Mock::RegisterUseByOnCallOrExpectCall(MockObject(), file, line);
-    TypedExpectation<F>* const expectation =
-        new TypedExpectation<F>(this, file, line, source_text, m);
-    const std::shared_ptr<ExpectationBase> untyped_expectation(expectation);
-    // See the definition of untyped_expectations_ for why access to
-    // it is unprotected here.
-    untyped_expectations_.push_back(untyped_expectation);
-
-    // Adds this expectation into the implicit sequence if there is one.
-    Sequence* const implicit_sequence = g_gmock_implicit_sequence.get();
-    if (implicit_sequence != nullptr) {
-      implicit_sequence->AddExpectation(Expectation(untyped_expectation));
-    }
-
-    return *expectation;
-  }
-
- private:
-  template <typename Func> friend class TypedExpectation;
-
-  // Some utilities needed for implementing UntypedInvokeWith().
-
-  // Describes what default action will be performed for the given
-  // arguments.
-  // L = *
-  void DescribeDefaultActionTo(const ArgumentTuple& args,
-                               ::std::ostream* os) const {
-    const OnCallSpec<F>* const spec = FindOnCallSpec(args);
-
-    if (spec == nullptr) {
-      *os << (std::is_void<Result>::value ? "returning directly.\n"
-                                          : "returning default value.\n");
-    } else {
-      *os << "taking default action specified at:\n"
-          << FormatFileLocation(spec->file(), spec->line()) << "\n";
-    }
-  }
-
-  // Writes a message that the call is uninteresting (i.e. neither
-  // explicitly expected nor explicitly unexpected) to the given
-  // ostream.
-  void UntypedDescribeUninterestingCall(const void* untyped_args,
-                                        ::std::ostream* os) const override
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-    const ArgumentTuple& args =
-        *static_cast<const ArgumentTuple*>(untyped_args);
-    *os << "Uninteresting mock function call - ";
-    DescribeDefaultActionTo(args, os);
-    *os << "    Function call: " << Name();
-    UniversalPrint(args, os);
-  }
-
-  // Returns the expectation that matches the given function arguments
-  // (or NULL is there's no match); when a match is found,
-  // untyped_action is set to point to the action that should be
-  // performed (or NULL if the action is "do default"), and
-  // is_excessive is modified to indicate whether the call exceeds the
-  // expected number.
-  //
-  // Critical section: We must find the matching expectation and the
-  // corresponding action that needs to be taken in an ATOMIC
-  // transaction.  Otherwise another thread may call this mock
-  // method in the middle and mess up the state.
-  //
-  // However, performing the action has to be left out of the critical
-  // section.  The reason is that we have no control on what the
-  // action does (it can invoke an arbitrary user function or even a
-  // mock function) and excessive locking could cause a dead lock.
-  const ExpectationBase* UntypedFindMatchingExpectation(
-      const void* untyped_args, const void** untyped_action, bool* is_excessive,
-      ::std::ostream* what, ::std::ostream* why) override
-      GTEST_LOCK_EXCLUDED_(g_gmock_mutex) {
-    const ArgumentTuple& args =
-        *static_cast<const ArgumentTuple*>(untyped_args);
-    MutexLock l(&g_gmock_mutex);
-    TypedExpectation<F>* exp = this->FindMatchingExpectationLocked(args);
-    if (exp == nullptr) {  // A match wasn't found.
-      this->FormatUnexpectedCallMessageLocked(args, what, why);
-      return nullptr;
-    }
-
-    // This line must be done before calling GetActionForArguments(),
-    // which will increment the call count for *exp and thus affect
-    // its saturation status.
-    *is_excessive = exp->IsSaturated();
-    const Action<F>* action = exp->GetActionForArguments(this, args, what, why);
-    if (action != nullptr && action->IsDoDefault())
-      action = nullptr;  // Normalize "do default" to NULL.
-    *untyped_action = action;
-    return exp;
-  }
-
-  // Prints the given function arguments to the ostream.
-  void UntypedPrintArgs(const void* untyped_args,
-                        ::std::ostream* os) const override {
-    const ArgumentTuple& args =
-        *static_cast<const ArgumentTuple*>(untyped_args);
-    UniversalPrint(args, os);
-  }
-
-  // Returns the expectation that matches the arguments, or NULL if no
-  // expectation matches them.
-  TypedExpectation<F>* FindMatchingExpectationLocked(
-      const ArgumentTuple& args) const
-          GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    // See the definition of untyped_expectations_ for why access to
-    // it is unprotected here.
-    for (typename UntypedExpectations::const_reverse_iterator it =
-             untyped_expectations_.rbegin();
-         it != untyped_expectations_.rend(); ++it) {
-      TypedExpectation<F>* const exp =
-          static_cast<TypedExpectation<F>*>(it->get());
-      if (exp->ShouldHandleArguments(args)) {
-        return exp;
-      }
-    }
-    return nullptr;
-  }
-
-  // Returns a message that the arguments don't match any expectation.
-  void FormatUnexpectedCallMessageLocked(
-      const ArgumentTuple& args,
-      ::std::ostream* os,
-      ::std::ostream* why) const
-          GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    *os << "\nUnexpected mock function call - ";
-    DescribeDefaultActionTo(args, os);
-    PrintTriedExpectationsLocked(args, why);
-  }
-
-  // Prints a list of expectations that have been tried against the
-  // current mock function call.
-  void PrintTriedExpectationsLocked(
-      const ArgumentTuple& args,
-      ::std::ostream* why) const
-          GTEST_EXCLUSIVE_LOCK_REQUIRED_(g_gmock_mutex) {
-    g_gmock_mutex.AssertHeld();
-    const size_t count = untyped_expectations_.size();
-    *why << "Google Mock tried the following " << count << " "
-         << (count == 1 ? "expectation, but it didn't match" :
-             "expectations, but none matched")
-         << ":\n";
-    for (size_t i = 0; i < count; i++) {
-      TypedExpectation<F>* const expectation =
-          static_cast<TypedExpectation<F>*>(untyped_expectations_[i].get());
-      *why << "\n";
-      expectation->DescribeLocationTo(why);
-      if (count > 1) {
-        *why << "tried expectation #" << i << ": ";
-      }
-      *why << expectation->source_text() << "...\n";
-      expectation->ExplainMatchResultTo(args, why);
-      expectation->DescribeCallCountTo(why);
-    }
-  }
-};  // class FunctionMocker
-
-// Reports an uninteresting call (whose description is in msg) in the
-// manner specified by 'reaction'.
-void ReportUninterestingCall(CallReaction reaction, const std::string& msg);
-
-}  // namespace internal
-
-namespace internal {
-
-template <typename F>
-class MockFunction;
-
-template <typename R, typename... Args>
-class MockFunction<R(Args...)> {
- public:
-  MockFunction(const MockFunction&) = delete;
-  MockFunction& operator=(const MockFunction&) = delete;
-
-  std::function<R(Args...)> AsStdFunction() {
-    return [this](Args... args) -> R {
-      return this->Call(std::forward<Args>(args)...);
-    };
-  }
-
-  // Implementation detail: the expansion of the MOCK_METHOD macro.
-  R Call(Args... args) {
-    mock_.SetOwnerAndName(this, "Call");
-    return mock_.Invoke(std::forward<Args>(args)...);
-  }
-
-  MockSpec<R(Args...)> gmock_Call(Matcher<Args>... m) {
-    mock_.RegisterOwner(this);
-    return mock_.With(std::move(m)...);
-  }
-
-  MockSpec<R(Args...)> gmock_Call(const WithoutMatchers&, R (*)(Args...)) {
-    return this->gmock_Call(::testing::A<Args>()...);
-  }
-
- protected:
-  MockFunction() = default;
-  ~MockFunction() = default;
-
- private:
-  FunctionMocker<R(Args...)> mock_;
-};
-
-/*
-The SignatureOf<F> struct is a meta-function returning function signature
-corresponding to the provided F argument.
-
-It makes use of MockFunction easier by allowing it to accept more F arguments
-than just function signatures.
-
-Specializations provided here cover only a signature type itself and
-std::function. However, if need be it can be easily extended to cover also other
-types (like for example boost::function).
-*/
-
-template <typename F>
-struct SignatureOf;
-
-template <typename R, typename... Args>
-struct SignatureOf<R(Args...)> {
-  using type = R(Args...);
-};
-
-template <typename F>
-struct SignatureOf<std::function<F>> : SignatureOf<F> {};
-
-template <typename F>
-using SignatureOfT = typename SignatureOf<F>::type;
-
-}  // namespace internal
-
-// A MockFunction<F> type has one mock method whose type is
-// internal::SignatureOfT<F>.  It is useful when you just want your
-// test code to emit some messages and have Google Mock verify the
-// right messages are sent (and perhaps at the right times).  For
-// example, if you are exercising code:
-//
-//   Foo(1);
-//   Foo(2);
-//   Foo(3);
-//
-// and want to verify that Foo(1) and Foo(3) both invoke
-// mock.Bar("a"), but Foo(2) doesn't invoke anything, you can write:
-//
-// TEST(FooTest, InvokesBarCorrectly) {
-//   MyMock mock;
-//   MockFunction<void(string check_point_name)> check;
-//   {
-//     InSequence s;
-//
-//     EXPECT_CALL(mock, Bar("a"));
-//     EXPECT_CALL(check, Call("1"));
-//     EXPECT_CALL(check, Call("2"));
-//     EXPECT_CALL(mock, Bar("a"));
-//   }
-//   Foo(1);
-//   check.Call("1");
-//   Foo(2);
-//   check.Call("2");
-//   Foo(3);
-// }
-//
-// The expectation spec says that the first Bar("a") must happen
-// before check point "1", the second Bar("a") must happen after check
-// point "2", and nothing should happen between the two check
-// points. The explicit check points make it easy to tell which
-// Bar("a") is called by which call to Foo().
-//
-// MockFunction<F> can also be used to exercise code that accepts
-// std::function<internal::SignatureOfT<F>> callbacks. To do so, use
-// AsStdFunction() method to create std::function proxy forwarding to
-// original object's Call. Example:
-//
-// TEST(FooTest, RunsCallbackWithBarArgument) {
-//   MockFunction<int(string)> callback;
-//   EXPECT_CALL(callback, Call("bar")).WillOnce(Return(1));
-//   Foo(callback.AsStdFunction());
-// }
-//
-// The internal::SignatureOfT<F> indirection allows to use other types
-// than just function signature type. This is typically useful when
-// providing a mock for a predefined std::function type. Example:
-//
-// using FilterPredicate = std::function<bool(string)>;
-// void MyFilterAlgorithm(FilterPredicate predicate);
-//
-// TEST(FooTest, FilterPredicateAlwaysAccepts) {
-//   MockFunction<FilterPredicate> predicateMock;
-//   EXPECT_CALL(predicateMock, Call(_)).WillRepeatedly(Return(true));
-//   MyFilterAlgorithm(predicateMock.AsStdFunction());
-// }
-template <typename F>
-class MockFunction : public internal::MockFunction<internal::SignatureOfT<F>> {
-  using Base = internal::MockFunction<internal::SignatureOfT<F>>;
-
- public:
-  using Base::Base;
-};
-
-// The style guide prohibits "using" statements in a namespace scope
-// inside a header file.  However, the MockSpec class template is
-// meant to be defined in the ::testing namespace.  The following line
-// is just a trick for working around a bug in MSVC 8.0, which cannot
-// handle it if we define MockSpec in ::testing.
-using internal::MockSpec;
-
-// Const(x) is a convenient function for obtaining a const reference
-// to x.  This is useful for setting expectations on an overloaded
-// const mock method, e.g.
-//
-//   class MockFoo : public FooInterface {
-//    public:
-//     MOCK_METHOD0(Bar, int());
-//     MOCK_CONST_METHOD0(Bar, int&());
-//   };
-//
-//   MockFoo foo;
-//   // Expects a call to non-const MockFoo::Bar().
-//   EXPECT_CALL(foo, Bar());
-//   // Expects a call to const MockFoo::Bar().
-//   EXPECT_CALL(Const(foo), Bar());
-template <typename T>
-inline const T& Const(const T& x) { return x; }
-
-// Constructs an Expectation object that references and co-owns exp.
-inline Expectation::Expectation(internal::ExpectationBase& exp)  // NOLINT
-    : expectation_base_(exp.GetHandle().expectation_base()) {}
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// Implementation for ON_CALL and EXPECT_CALL macros. A separate macro is
-// required to avoid compile errors when the name of the method used in call is
-// a result of macro expansion. See CompilesWithMethodNameExpandedFromMacro
-// tests in internal/gmock-spec-builders_test.cc for more details.
-//
-// This macro supports statements both with and without parameter matchers. If
-// the parameter list is omitted, gMock will accept any parameters, which allows
-// tests to be written that don't need to encode the number of method
-// parameter. This technique may only be used for non-overloaded methods.
-//
-//   // These are the same:
-//   ON_CALL(mock, NoArgsMethod()).WillByDefault(...);
-//   ON_CALL(mock, NoArgsMethod).WillByDefault(...);
-//
-//   // As are these:
-//   ON_CALL(mock, TwoArgsMethod(_, _)).WillByDefault(...);
-//   ON_CALL(mock, TwoArgsMethod).WillByDefault(...);
-//
-//   // Can also specify args if you want, of course:
-//   ON_CALL(mock, TwoArgsMethod(_, 45)).WillByDefault(...);
-//
-//   // Overloads work as long as you specify parameters:
-//   ON_CALL(mock, OverloadedMethod(_)).WillByDefault(...);
-//   ON_CALL(mock, OverloadedMethod(_, _)).WillByDefault(...);
-//
-//   // Oops! Which overload did you want?
-//   ON_CALL(mock, OverloadedMethod).WillByDefault(...);
-//     => ERROR: call to member function 'gmock_OverloadedMethod' is ambiguous
-//
-// How this works: The mock class uses two overloads of the gmock_Method
-// expectation setter method plus an operator() overload on the MockSpec object.
-// In the matcher list form, the macro expands to:
-//
-//   // This statement:
-//   ON_CALL(mock, TwoArgsMethod(_, 45))...
-//
-//   // ...expands to:
-//   mock.gmock_TwoArgsMethod(_, 45)(WithoutMatchers(), nullptr)...
-//   |-------------v---------------||------------v-------------|
-//       invokes first overload        swallowed by operator()
-//
-//   // ...which is essentially:
-//   mock.gmock_TwoArgsMethod(_, 45)...
-//
-// Whereas the form without a matcher list:
-//
-//   // This statement:
-//   ON_CALL(mock, TwoArgsMethod)...
-//
-//   // ...expands to:
-//   mock.gmock_TwoArgsMethod(WithoutMatchers(), nullptr)...
-//   |-----------------------v--------------------------|
-//                 invokes second overload
-//
-//   // ...which is essentially:
-//   mock.gmock_TwoArgsMethod(_, _)...
-//
-// The WithoutMatchers() argument is used to disambiguate overloads and to
-// block the caller from accidentally invoking the second overload directly. The
-// second argument is an internal type derived from the method signature. The
-// failure to disambiguate two overloads of this method in the ON_CALL statement
-// is how we block callers from setting expectations on overloaded methods.
-#define GMOCK_ON_CALL_IMPL_(mock_expr, Setter, call)                    \
-  ((mock_expr).gmock_##call)(::testing::internal::GetWithoutMatchers(), \
-                             nullptr)                                   \
-      .Setter(__FILE__, __LINE__, #mock_expr, #call)
-
-#define ON_CALL(obj, call) \
-  GMOCK_ON_CALL_IMPL_(obj, InternalDefaultActionSetAt, call)
-
-#define EXPECT_CALL(obj, call) \
-  GMOCK_ON_CALL_IMPL_(obj, InternalExpectedAt, call)
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_SPEC_BUILDERS_H_
-
-namespace testing {
-namespace internal {
-template <typename T>
-using identity_t = T;
-
-template <typename Pattern>
-struct ThisRefAdjuster {
-  template <typename T>
-  using AdjustT = typename std::conditional<
-      std::is_const<typename std::remove_reference<Pattern>::type>::value,
-      typename std::conditional<std::is_lvalue_reference<Pattern>::value,
-                                const T&, const T&&>::type,
-      typename std::conditional<std::is_lvalue_reference<Pattern>::value, T&,
-                                T&&>::type>::type;
-
-  template <typename MockType>
-  static AdjustT<MockType> Adjust(const MockType& mock) {
-    return static_cast<AdjustT<MockType>>(const_cast<MockType&>(mock));
-  }
-};
-
-}  // namespace internal
-
-// The style guide prohibits "using" statements in a namespace scope
-// inside a header file.  However, the FunctionMocker class template
-// is meant to be defined in the ::testing namespace.  The following
-// line is just a trick for working around a bug in MSVC 8.0, which
-// cannot handle it if we define FunctionMocker in ::testing.
-using internal::FunctionMocker;
-}  // namespace testing
-
-#define MOCK_METHOD(...) \
-  GMOCK_PP_VARIADIC_CALL(GMOCK_INTERNAL_MOCK_METHOD_ARG_, __VA_ARGS__)
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_1(...) \
-  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_2(...) \
-  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_3(_Ret, _MethodName, _Args) \
-  GMOCK_INTERNAL_MOCK_METHOD_ARG_4(_Ret, _MethodName, _Args, ())
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_4(_Ret, _MethodName, _Args, _Spec)     \
-  GMOCK_INTERNAL_ASSERT_PARENTHESIS(_Args);                                   \
-  GMOCK_INTERNAL_ASSERT_PARENTHESIS(_Spec);                                   \
-  GMOCK_INTERNAL_ASSERT_VALID_SIGNATURE(                                      \
-      GMOCK_PP_NARG0 _Args, GMOCK_INTERNAL_SIGNATURE(_Ret, _Args));           \
-  GMOCK_INTERNAL_ASSERT_VALID_SPEC(_Spec)                                     \
-  GMOCK_INTERNAL_MOCK_METHOD_IMPL(                                            \
-      GMOCK_PP_NARG0 _Args, _MethodName, GMOCK_INTERNAL_HAS_CONST(_Spec),     \
-      GMOCK_INTERNAL_HAS_OVERRIDE(_Spec), GMOCK_INTERNAL_HAS_FINAL(_Spec),    \
-      GMOCK_INTERNAL_GET_NOEXCEPT_SPEC(_Spec),                                \
-      GMOCK_INTERNAL_GET_CALLTYPE(_Spec), GMOCK_INTERNAL_GET_REF_SPEC(_Spec), \
-      (GMOCK_INTERNAL_SIGNATURE(_Ret, _Args)))
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_5(...) \
-  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_6(...) \
-  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
-
-#define GMOCK_INTERNAL_MOCK_METHOD_ARG_7(...) \
-  GMOCK_INTERNAL_WRONG_ARITY(__VA_ARGS__)
-
-#define GMOCK_INTERNAL_WRONG_ARITY(...)                                      \
-  static_assert(                                                             \
-      false,                                                                 \
-      "MOCK_METHOD must be called with 3 or 4 arguments. _Ret, "             \
-      "_MethodName, _Args and optionally _Spec. _Args and _Spec must be "    \
-      "enclosed in parentheses. If _Ret is a type with unprotected commas, " \
-      "it must also be enclosed in parentheses.")
-
-#define GMOCK_INTERNAL_ASSERT_PARENTHESIS(_Tuple) \
-  static_assert(                                  \
-      GMOCK_PP_IS_ENCLOSED_PARENS(_Tuple),        \
-      GMOCK_PP_STRINGIZE(_Tuple) " should be enclosed in parentheses.")
-
-#define GMOCK_INTERNAL_ASSERT_VALID_SIGNATURE(_N, ...)                 \
-  static_assert(                                                       \
-      std::is_function<__VA_ARGS__>::value,                            \
-      "Signature must be a function type, maybe return type contains " \
-      "unprotected comma.");                                           \
-  static_assert(                                                       \
-      ::testing::tuple_size<typename ::testing::internal::Function<    \
-              __VA_ARGS__>::ArgumentTuple>::value == _N,               \
-      "This method does not take " GMOCK_PP_STRINGIZE(                 \
-          _N) " arguments. Parenthesize all types with unprotected commas.")
-
-#define GMOCK_INTERNAL_ASSERT_VALID_SPEC(_Spec) \
-  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_ASSERT_VALID_SPEC_ELEMENT, ~, _Spec)
-
-#define GMOCK_INTERNAL_MOCK_METHOD_IMPL(_N, _MethodName, _Constness,           \
-                                        _Override, _Final, _NoexceptSpec,      \
-                                        _CallType, _RefSpec, _Signature)       \
-  typename ::testing::internal::Function<GMOCK_PP_REMOVE_PARENS(               \
-      _Signature)>::Result                                                     \
-  GMOCK_INTERNAL_EXPAND(_CallType)                                             \
-      _MethodName(GMOCK_PP_REPEAT(GMOCK_INTERNAL_PARAMETER, _Signature, _N))   \
-          GMOCK_PP_IF(_Constness, const, ) _RefSpec _NoexceptSpec              \
-          GMOCK_PP_IF(_Override, override, ) GMOCK_PP_IF(_Final, final, ) {    \
-    GMOCK_MOCKER_(_N, _Constness, _MethodName)                                 \
-        .SetOwnerAndName(this, #_MethodName);                                  \
-    return GMOCK_MOCKER_(_N, _Constness, _MethodName)                          \
-        .Invoke(GMOCK_PP_REPEAT(GMOCK_INTERNAL_FORWARD_ARG, _Signature, _N));  \
-  }                                                                            \
-  ::testing::MockSpec<GMOCK_PP_REMOVE_PARENS(_Signature)> gmock_##_MethodName( \
-      GMOCK_PP_REPEAT(GMOCK_INTERNAL_MATCHER_PARAMETER, _Signature, _N))       \
-      GMOCK_PP_IF(_Constness, const, ) _RefSpec {                              \
-    GMOCK_MOCKER_(_N, _Constness, _MethodName).RegisterOwner(this);            \
-    return GMOCK_MOCKER_(_N, _Constness, _MethodName)                          \
-        .With(GMOCK_PP_REPEAT(GMOCK_INTERNAL_MATCHER_ARGUMENT, , _N));         \
-  }                                                                            \
-  ::testing::MockSpec<GMOCK_PP_REMOVE_PARENS(_Signature)> gmock_##_MethodName( \
-      const ::testing::internal::WithoutMatchers&,                             \
-      GMOCK_PP_IF(_Constness, const, )::testing::internal::Function<           \
-          GMOCK_PP_REMOVE_PARENS(_Signature)>*) const _RefSpec _NoexceptSpec { \
-    return ::testing::internal::ThisRefAdjuster<GMOCK_PP_IF(                   \
-        _Constness, const, ) int _RefSpec>::Adjust(*this)                      \
-        .gmock_##_MethodName(GMOCK_PP_REPEAT(                                  \
-            GMOCK_INTERNAL_A_MATCHER_ARGUMENT, _Signature, _N));               \
-  }                                                                            \
-  mutable ::testing::FunctionMocker<GMOCK_PP_REMOVE_PARENS(_Signature)>        \
-      GMOCK_MOCKER_(_N, _Constness, _MethodName)
-
-#define GMOCK_INTERNAL_EXPAND(...) __VA_ARGS__
-
-// Five Valid modifiers.
-#define GMOCK_INTERNAL_HAS_CONST(_Tuple) \
-  GMOCK_PP_HAS_COMMA(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_DETECT_CONST, ~, _Tuple))
-
-#define GMOCK_INTERNAL_HAS_OVERRIDE(_Tuple) \
-  GMOCK_PP_HAS_COMMA(                       \
-      GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_DETECT_OVERRIDE, ~, _Tuple))
-
-#define GMOCK_INTERNAL_HAS_FINAL(_Tuple) \
-  GMOCK_PP_HAS_COMMA(GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_DETECT_FINAL, ~, _Tuple))
-
-#define GMOCK_INTERNAL_GET_NOEXCEPT_SPEC(_Tuple) \
-  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_NOEXCEPT_SPEC_IF_NOEXCEPT, ~, _Tuple)
-
-#define GMOCK_INTERNAL_NOEXCEPT_SPEC_IF_NOEXCEPT(_i, _, _elem)          \
-  GMOCK_PP_IF(                                                          \
-      GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_NOEXCEPT(_i, _, _elem)), \
-      _elem, )
-
-#define GMOCK_INTERNAL_GET_REF_SPEC(_Tuple) \
-  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_REF_SPEC_IF_REF, ~, _Tuple)
-
-#define GMOCK_INTERNAL_REF_SPEC_IF_REF(_i, _, _elem)                       \
-  GMOCK_PP_IF(GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_REF(_i, _, _elem)), \
-              GMOCK_PP_CAT(GMOCK_INTERNAL_UNPACK_, _elem), )
-
-#define GMOCK_INTERNAL_GET_CALLTYPE(_Tuple) \
-  GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_GET_CALLTYPE_IMPL, ~, _Tuple)
-
-#define GMOCK_INTERNAL_ASSERT_VALID_SPEC_ELEMENT(_i, _, _elem)            \
-  static_assert(                                                          \
-      (GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_CONST(_i, _, _elem)) +    \
-       GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_OVERRIDE(_i, _, _elem)) + \
-       GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_FINAL(_i, _, _elem)) +    \
-       GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_NOEXCEPT(_i, _, _elem)) + \
-       GMOCK_PP_HAS_COMMA(GMOCK_INTERNAL_DETECT_REF(_i, _, _elem)) +      \
-       GMOCK_INTERNAL_IS_CALLTYPE(_elem)) == 1,                           \
-      GMOCK_PP_STRINGIZE(                                                 \
-          _elem) " cannot be recognized as a valid specification modifier.");
-
-// Modifiers implementation.
-#define GMOCK_INTERNAL_DETECT_CONST(_i, _, _elem) \
-  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_CONST_I_, _elem)
-
-#define GMOCK_INTERNAL_DETECT_CONST_I_const ,
-
-#define GMOCK_INTERNAL_DETECT_OVERRIDE(_i, _, _elem) \
-  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_OVERRIDE_I_, _elem)
-
-#define GMOCK_INTERNAL_DETECT_OVERRIDE_I_override ,
-
-#define GMOCK_INTERNAL_DETECT_FINAL(_i, _, _elem) \
-  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_FINAL_I_, _elem)
-
-#define GMOCK_INTERNAL_DETECT_FINAL_I_final ,
-
-#define GMOCK_INTERNAL_DETECT_NOEXCEPT(_i, _, _elem) \
-  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_NOEXCEPT_I_, _elem)
-
-#define GMOCK_INTERNAL_DETECT_NOEXCEPT_I_noexcept ,
-
-#define GMOCK_INTERNAL_DETECT_REF(_i, _, _elem) \
-  GMOCK_PP_CAT(GMOCK_INTERNAL_DETECT_REF_I_, _elem)
-
-#define GMOCK_INTERNAL_DETECT_REF_I_ref ,
-
-#define GMOCK_INTERNAL_UNPACK_ref(x) x
-
-#define GMOCK_INTERNAL_GET_CALLTYPE_IMPL(_i, _, _elem)           \
-  GMOCK_PP_IF(GMOCK_INTERNAL_IS_CALLTYPE(_elem),                 \
-              GMOCK_INTERNAL_GET_VALUE_CALLTYPE, GMOCK_PP_EMPTY) \
-  (_elem)
-
-// TODO(iserna): GMOCK_INTERNAL_IS_CALLTYPE and
-// GMOCK_INTERNAL_GET_VALUE_CALLTYPE needed more expansions to work on windows
-// maybe they can be simplified somehow.
-#define GMOCK_INTERNAL_IS_CALLTYPE(_arg) \
-  GMOCK_INTERNAL_IS_CALLTYPE_I(          \
-      GMOCK_PP_CAT(GMOCK_INTERNAL_IS_CALLTYPE_HELPER_, _arg))
-#define GMOCK_INTERNAL_IS_CALLTYPE_I(_arg) GMOCK_PP_IS_ENCLOSED_PARENS(_arg)
-
-#define GMOCK_INTERNAL_GET_VALUE_CALLTYPE(_arg) \
-  GMOCK_INTERNAL_GET_VALUE_CALLTYPE_I(          \
-      GMOCK_PP_CAT(GMOCK_INTERNAL_IS_CALLTYPE_HELPER_, _arg))
-#define GMOCK_INTERNAL_GET_VALUE_CALLTYPE_I(_arg) \
-  GMOCK_PP_IDENTITY _arg
-
-#define GMOCK_INTERNAL_IS_CALLTYPE_HELPER_Calltype
-
-// Note: The use of `identity_t` here allows _Ret to represent return types that
-// would normally need to be specified in a different way. For example, a method
-// returning a function pointer must be written as
-//
-// fn_ptr_return_t (*method(method_args_t...))(fn_ptr_args_t...)
-//
-// But we only support placing the return type at the beginning. To handle this,
-// we wrap all calls in identity_t, so that a declaration will be expanded to
-//
-// identity_t<fn_ptr_return_t (*)(fn_ptr_args_t...)> method(method_args_t...)
-//
-// This allows us to work around the syntactic oddities of function/method
-// types.
-#define GMOCK_INTERNAL_SIGNATURE(_Ret, _Args)                                 \
-  ::testing::internal::identity_t<GMOCK_PP_IF(GMOCK_PP_IS_BEGIN_PARENS(_Ret), \
-                                              GMOCK_PP_REMOVE_PARENS,         \
-                                              GMOCK_PP_IDENTITY)(_Ret)>(      \
-      GMOCK_PP_FOR_EACH(GMOCK_INTERNAL_GET_TYPE, _, _Args))
-
-#define GMOCK_INTERNAL_GET_TYPE(_i, _, _elem)                          \
-  GMOCK_PP_COMMA_IF(_i)                                                \
-  GMOCK_PP_IF(GMOCK_PP_IS_BEGIN_PARENS(_elem), GMOCK_PP_REMOVE_PARENS, \
-              GMOCK_PP_IDENTITY)                                       \
-  (_elem)
-
-#define GMOCK_INTERNAL_PARAMETER(_i, _Signature, _)            \
-  GMOCK_PP_COMMA_IF(_i)                                        \
-  GMOCK_INTERNAL_ARG_O(_i, GMOCK_PP_REMOVE_PARENS(_Signature)) \
-  gmock_a##_i
-
-#define GMOCK_INTERNAL_FORWARD_ARG(_i, _Signature, _) \
-  GMOCK_PP_COMMA_IF(_i)                               \
-  ::std::forward<GMOCK_INTERNAL_ARG_O(                \
-      _i, GMOCK_PP_REMOVE_PARENS(_Signature))>(gmock_a##_i)
-
-#define GMOCK_INTERNAL_MATCHER_PARAMETER(_i, _Signature, _)        \
-  GMOCK_PP_COMMA_IF(_i)                                            \
-  GMOCK_INTERNAL_MATCHER_O(_i, GMOCK_PP_REMOVE_PARENS(_Signature)) \
-  gmock_a##_i
-
-#define GMOCK_INTERNAL_MATCHER_ARGUMENT(_i, _1, _2) \
-  GMOCK_PP_COMMA_IF(_i)                             \
-  gmock_a##_i
-
-#define GMOCK_INTERNAL_A_MATCHER_ARGUMENT(_i, _Signature, _) \
-  GMOCK_PP_COMMA_IF(_i)                                      \
-  ::testing::A<GMOCK_INTERNAL_ARG_O(_i, GMOCK_PP_REMOVE_PARENS(_Signature))>()
-
-#define GMOCK_INTERNAL_ARG_O(_i, ...) \
-  typename ::testing::internal::Function<__VA_ARGS__>::template Arg<_i>::type
-
-#define GMOCK_INTERNAL_MATCHER_O(_i, ...)                          \
-  const ::testing::Matcher<typename ::testing::internal::Function< \
-      __VA_ARGS__>::template Arg<_i>::type>&
-
-#define MOCK_METHOD0(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 0, __VA_ARGS__)
-#define MOCK_METHOD1(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 1, __VA_ARGS__)
-#define MOCK_METHOD2(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 2, __VA_ARGS__)
-#define MOCK_METHOD3(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 3, __VA_ARGS__)
-#define MOCK_METHOD4(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 4, __VA_ARGS__)
-#define MOCK_METHOD5(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 5, __VA_ARGS__)
-#define MOCK_METHOD6(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 6, __VA_ARGS__)
-#define MOCK_METHOD7(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 7, __VA_ARGS__)
-#define MOCK_METHOD8(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 8, __VA_ARGS__)
-#define MOCK_METHOD9(m, ...) GMOCK_INTERNAL_MOCK_METHODN(, , m, 9, __VA_ARGS__)
-#define MOCK_METHOD10(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, , m, 10, __VA_ARGS__)
-
-#define MOCK_CONST_METHOD0(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 0, __VA_ARGS__)
-#define MOCK_CONST_METHOD1(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 1, __VA_ARGS__)
-#define MOCK_CONST_METHOD2(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 2, __VA_ARGS__)
-#define MOCK_CONST_METHOD3(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 3, __VA_ARGS__)
-#define MOCK_CONST_METHOD4(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 4, __VA_ARGS__)
-#define MOCK_CONST_METHOD5(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 5, __VA_ARGS__)
-#define MOCK_CONST_METHOD6(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 6, __VA_ARGS__)
-#define MOCK_CONST_METHOD7(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 7, __VA_ARGS__)
-#define MOCK_CONST_METHOD8(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 8, __VA_ARGS__)
-#define MOCK_CONST_METHOD9(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 9, __VA_ARGS__)
-#define MOCK_CONST_METHOD10(m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, , m, 10, __VA_ARGS__)
-
-#define MOCK_METHOD0_T(m, ...) MOCK_METHOD0(m, __VA_ARGS__)
-#define MOCK_METHOD1_T(m, ...) MOCK_METHOD1(m, __VA_ARGS__)
-#define MOCK_METHOD2_T(m, ...) MOCK_METHOD2(m, __VA_ARGS__)
-#define MOCK_METHOD3_T(m, ...) MOCK_METHOD3(m, __VA_ARGS__)
-#define MOCK_METHOD4_T(m, ...) MOCK_METHOD4(m, __VA_ARGS__)
-#define MOCK_METHOD5_T(m, ...) MOCK_METHOD5(m, __VA_ARGS__)
-#define MOCK_METHOD6_T(m, ...) MOCK_METHOD6(m, __VA_ARGS__)
-#define MOCK_METHOD7_T(m, ...) MOCK_METHOD7(m, __VA_ARGS__)
-#define MOCK_METHOD8_T(m, ...) MOCK_METHOD8(m, __VA_ARGS__)
-#define MOCK_METHOD9_T(m, ...) MOCK_METHOD9(m, __VA_ARGS__)
-#define MOCK_METHOD10_T(m, ...) MOCK_METHOD10(m, __VA_ARGS__)
-
-#define MOCK_CONST_METHOD0_T(m, ...) MOCK_CONST_METHOD0(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD1_T(m, ...) MOCK_CONST_METHOD1(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD2_T(m, ...) MOCK_CONST_METHOD2(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD3_T(m, ...) MOCK_CONST_METHOD3(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD4_T(m, ...) MOCK_CONST_METHOD4(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD5_T(m, ...) MOCK_CONST_METHOD5(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD6_T(m, ...) MOCK_CONST_METHOD6(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD7_T(m, ...) MOCK_CONST_METHOD7(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD8_T(m, ...) MOCK_CONST_METHOD8(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD9_T(m, ...) MOCK_CONST_METHOD9(m, __VA_ARGS__)
-#define MOCK_CONST_METHOD10_T(m, ...) MOCK_CONST_METHOD10(m, __VA_ARGS__)
-
-#define MOCK_METHOD0_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 0, __VA_ARGS__)
-#define MOCK_METHOD1_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 1, __VA_ARGS__)
-#define MOCK_METHOD2_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 2, __VA_ARGS__)
-#define MOCK_METHOD3_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 3, __VA_ARGS__)
-#define MOCK_METHOD4_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 4, __VA_ARGS__)
-#define MOCK_METHOD5_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 5, __VA_ARGS__)
-#define MOCK_METHOD6_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 6, __VA_ARGS__)
-#define MOCK_METHOD7_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 7, __VA_ARGS__)
-#define MOCK_METHOD8_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 8, __VA_ARGS__)
-#define MOCK_METHOD9_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 9, __VA_ARGS__)
-#define MOCK_METHOD10_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(, ct, m, 10, __VA_ARGS__)
-
-#define MOCK_CONST_METHOD0_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 0, __VA_ARGS__)
-#define MOCK_CONST_METHOD1_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 1, __VA_ARGS__)
-#define MOCK_CONST_METHOD2_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 2, __VA_ARGS__)
-#define MOCK_CONST_METHOD3_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 3, __VA_ARGS__)
-#define MOCK_CONST_METHOD4_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 4, __VA_ARGS__)
-#define MOCK_CONST_METHOD5_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 5, __VA_ARGS__)
-#define MOCK_CONST_METHOD6_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 6, __VA_ARGS__)
-#define MOCK_CONST_METHOD7_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 7, __VA_ARGS__)
-#define MOCK_CONST_METHOD8_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 8, __VA_ARGS__)
-#define MOCK_CONST_METHOD9_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 9, __VA_ARGS__)
-#define MOCK_CONST_METHOD10_WITH_CALLTYPE(ct, m, ...) \
-  GMOCK_INTERNAL_MOCK_METHODN(const, ct, m, 10, __VA_ARGS__)
-
-#define MOCK_METHOD0_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD0_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD1_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD1_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD2_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD2_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD3_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD3_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD4_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD4_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD5_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD5_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD6_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD6_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD7_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD7_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD8_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD8_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD9_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD9_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_METHOD10_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_METHOD10_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-
-#define MOCK_CONST_METHOD0_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD0_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD1_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD1_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD2_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD2_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD3_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD3_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD4_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD4_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD5_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD5_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD6_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD6_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD7_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD7_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD8_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD8_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD9_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD9_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-#define MOCK_CONST_METHOD10_T_WITH_CALLTYPE(ct, m, ...) \
-  MOCK_CONST_METHOD10_WITH_CALLTYPE(ct, m, __VA_ARGS__)
-
-#define GMOCK_INTERNAL_MOCK_METHODN(constness, ct, Method, args_num, ...) \
-  GMOCK_INTERNAL_ASSERT_VALID_SIGNATURE(                                  \
-      args_num, ::testing::internal::identity_t<__VA_ARGS__>);            \
-  GMOCK_INTERNAL_MOCK_METHOD_IMPL(                                        \
-      args_num, Method, GMOCK_PP_NARG0(constness), 0, 0, , ct, ,          \
-      (::testing::internal::identity_t<__VA_ARGS__>))
-
-#define GMOCK_MOCKER_(arity, constness, Method) \
-  GTEST_CONCAT_TOKEN_(gmock##constness##arity##_##Method##_, __LINE__)
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_FUNCTION_MOCKER_H_
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements some commonly used variadic actions.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
-
-#include <memory>
-#include <utility>
-
-
-// Include any custom callback actions added by the local installation.
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_GENERATED_ACTIONS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_GENERATED_ACTIONS_H_
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_CUSTOM_GMOCK_GENERATED_ACTIONS_H_
-
-// Sometimes you want to give an action explicit template parameters
-// that cannot be inferred from its value parameters.  ACTION() and
-// ACTION_P*() don't support that.  ACTION_TEMPLATE() remedies that
-// and can be viewed as an extension to ACTION() and ACTION_P*().
-//
-// The syntax:
-//
-//   ACTION_TEMPLATE(ActionName,
-//                   HAS_m_TEMPLATE_PARAMS(kind1, name1, ..., kind_m, name_m),
-//                   AND_n_VALUE_PARAMS(p1, ..., p_n)) { statements; }
-//
-// defines an action template that takes m explicit template
-// parameters and n value parameters.  name_i is the name of the i-th
-// template parameter, and kind_i specifies whether it's a typename,
-// an integral constant, or a template.  p_i is the name of the i-th
-// value parameter.
-//
-// Example:
-//
-//   // DuplicateArg<k, T>(output) converts the k-th argument of the mock
-//   // function to type T and copies it to *output.
-//   ACTION_TEMPLATE(DuplicateArg,
-//                   HAS_2_TEMPLATE_PARAMS(int, k, typename, T),
-//                   AND_1_VALUE_PARAMS(output)) {
-//     *output = T(::std::get<k>(args));
-//   }
-//   ...
-//     int n;
-//     EXPECT_CALL(mock, Foo(_, _))
-//         .WillOnce(DuplicateArg<1, unsigned char>(&n));
-//
-// To create an instance of an action template, write:
-//
-//   ActionName<t1, ..., t_m>(v1, ..., v_n)
-//
-// where the ts are the template arguments and the vs are the value
-// arguments.  The value argument types are inferred by the compiler.
-// If you want to explicitly specify the value argument types, you can
-// provide additional template arguments:
-//
-//   ActionName<t1, ..., t_m, u1, ..., u_k>(v1, ..., v_n)
-//
-// where u_i is the desired type of v_i.
-//
-// ACTION_TEMPLATE and ACTION/ACTION_P* can be overloaded on the
-// number of value parameters, but not on the number of template
-// parameters.  Without the restriction, the meaning of the following
-// is unclear:
-//
-//   OverloadedAction<int, bool>(x);
-//
-// Are we using a single-template-parameter action where 'bool' refers
-// to the type of x, or are we using a two-template-parameter action
-// where the compiler is asked to infer the type of x?
-//
-// Implementation notes:
-//
-// GMOCK_INTERNAL_*_HAS_m_TEMPLATE_PARAMS and
-// GMOCK_INTERNAL_*_AND_n_VALUE_PARAMS are internal macros for
-// implementing ACTION_TEMPLATE.  The main trick we use is to create
-// new macro invocations when expanding a macro.  For example, we have
-//
-//   #define ACTION_TEMPLATE(name, template_params, value_params)
-//       ... GMOCK_INTERNAL_DECL_##template_params ...
-//
-// which causes ACTION_TEMPLATE(..., HAS_1_TEMPLATE_PARAMS(typename, T), ...)
-// to expand to
-//
-//       ... GMOCK_INTERNAL_DECL_HAS_1_TEMPLATE_PARAMS(typename, T) ...
-//
-// Since GMOCK_INTERNAL_DECL_HAS_1_TEMPLATE_PARAMS is a macro, the
-// preprocessor will continue to expand it to
-//
-//       ... typename T ...
-//
-// This technique conforms to the C++ standard and is portable.  It
-// allows us to implement action templates using O(N) code, where N is
-// the maximum number of template/value parameters supported.  Without
-// using it, we'd have to devote O(N^2) amount of code to implement all
-// combinations of m and n.
-
-// Declares the template parameters.
-#define GMOCK_INTERNAL_DECL_HAS_1_TEMPLATE_PARAMS(kind0, name0) kind0 name0
-#define GMOCK_INTERNAL_DECL_HAS_2_TEMPLATE_PARAMS(kind0, name0, kind1, \
-    name1) kind0 name0, kind1 name1
-#define GMOCK_INTERNAL_DECL_HAS_3_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2) kind0 name0, kind1 name1, kind2 name2
-#define GMOCK_INTERNAL_DECL_HAS_4_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3) kind0 name0, kind1 name1, kind2 name2, \
-    kind3 name3
-#define GMOCK_INTERNAL_DECL_HAS_5_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4) kind0 name0, kind1 name1, \
-    kind2 name2, kind3 name3, kind4 name4
-#define GMOCK_INTERNAL_DECL_HAS_6_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5) kind0 name0, \
-    kind1 name1, kind2 name2, kind3 name3, kind4 name4, kind5 name5
-#define GMOCK_INTERNAL_DECL_HAS_7_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, \
-    name6) kind0 name0, kind1 name1, kind2 name2, kind3 name3, kind4 name4, \
-    kind5 name5, kind6 name6
-#define GMOCK_INTERNAL_DECL_HAS_8_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, name6, \
-    kind7, name7) kind0 name0, kind1 name1, kind2 name2, kind3 name3, \
-    kind4 name4, kind5 name5, kind6 name6, kind7 name7
-#define GMOCK_INTERNAL_DECL_HAS_9_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, name6, \
-    kind7, name7, kind8, name8) kind0 name0, kind1 name1, kind2 name2, \
-    kind3 name3, kind4 name4, kind5 name5, kind6 name6, kind7 name7, \
-    kind8 name8
-#define GMOCK_INTERNAL_DECL_HAS_10_TEMPLATE_PARAMS(kind0, name0, kind1, \
-    name1, kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, \
-    name6, kind7, name7, kind8, name8, kind9, name9) kind0 name0, \
-    kind1 name1, kind2 name2, kind3 name3, kind4 name4, kind5 name5, \
-    kind6 name6, kind7 name7, kind8 name8, kind9 name9
-
-// Lists the template parameters.
-#define GMOCK_INTERNAL_LIST_HAS_1_TEMPLATE_PARAMS(kind0, name0) name0
-#define GMOCK_INTERNAL_LIST_HAS_2_TEMPLATE_PARAMS(kind0, name0, kind1, \
-    name1) name0, name1
-#define GMOCK_INTERNAL_LIST_HAS_3_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2) name0, name1, name2
-#define GMOCK_INTERNAL_LIST_HAS_4_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3) name0, name1, name2, name3
-#define GMOCK_INTERNAL_LIST_HAS_5_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4) name0, name1, name2, name3, \
-    name4
-#define GMOCK_INTERNAL_LIST_HAS_6_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5) name0, name1, \
-    name2, name3, name4, name5
-#define GMOCK_INTERNAL_LIST_HAS_7_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, \
-    name6) name0, name1, name2, name3, name4, name5, name6
-#define GMOCK_INTERNAL_LIST_HAS_8_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, name6, \
-    kind7, name7) name0, name1, name2, name3, name4, name5, name6, name7
-#define GMOCK_INTERNAL_LIST_HAS_9_TEMPLATE_PARAMS(kind0, name0, kind1, name1, \
-    kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, name6, \
-    kind7, name7, kind8, name8) name0, name1, name2, name3, name4, name5, \
-    name6, name7, name8
-#define GMOCK_INTERNAL_LIST_HAS_10_TEMPLATE_PARAMS(kind0, name0, kind1, \
-    name1, kind2, name2, kind3, name3, kind4, name4, kind5, name5, kind6, \
-    name6, kind7, name7, kind8, name8, kind9, name9) name0, name1, name2, \
-    name3, name4, name5, name6, name7, name8, name9
-
-// Declares the types of value parameters.
-#define GMOCK_INTERNAL_DECL_TYPE_AND_0_VALUE_PARAMS()
-#define GMOCK_INTERNAL_DECL_TYPE_AND_1_VALUE_PARAMS(p0) , typename p0##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_2_VALUE_PARAMS(p0, p1) , \
-    typename p0##_type, typename p1##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_3_VALUE_PARAMS(p0, p1, p2) , \
-    typename p0##_type, typename p1##_type, typename p2##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_4_VALUE_PARAMS(p0, p1, p2, p3) , \
-    typename p0##_type, typename p1##_type, typename p2##_type, \
-    typename p3##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4) , \
-    typename p0##_type, typename p1##_type, typename p2##_type, \
-    typename p3##_type, typename p4##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5) , \
-    typename p0##_type, typename p1##_type, typename p2##_type, \
-    typename p3##_type, typename p4##_type, typename p5##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6) , typename p0##_type, typename p1##_type, typename p2##_type, \
-    typename p3##_type, typename p4##_type, typename p5##_type, \
-    typename p6##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6, p7) , typename p0##_type, typename p1##_type, typename p2##_type, \
-    typename p3##_type, typename p4##_type, typename p5##_type, \
-    typename p6##_type, typename p7##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6, p7, p8) , typename p0##_type, typename p1##_type, typename p2##_type, \
-    typename p3##_type, typename p4##_type, typename p5##_type, \
-    typename p6##_type, typename p7##_type, typename p8##_type
-#define GMOCK_INTERNAL_DECL_TYPE_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6, p7, p8, p9) , typename p0##_type, typename p1##_type, \
-    typename p2##_type, typename p3##_type, typename p4##_type, \
-    typename p5##_type, typename p6##_type, typename p7##_type, \
-    typename p8##_type, typename p9##_type
-
-// Initializes the value parameters.
-#define GMOCK_INTERNAL_INIT_AND_0_VALUE_PARAMS()\
-    ()
-#define GMOCK_INTERNAL_INIT_AND_1_VALUE_PARAMS(p0)\
-    (p0##_type gmock_p0) : p0(::std::move(gmock_p0))
-#define GMOCK_INTERNAL_INIT_AND_2_VALUE_PARAMS(p0, p1)\
-    (p0##_type gmock_p0, p1##_type gmock_p1) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1))
-#define GMOCK_INTERNAL_INIT_AND_3_VALUE_PARAMS(p0, p1, p2)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, \
-        p2##_type gmock_p2) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2))
-#define GMOCK_INTERNAL_INIT_AND_4_VALUE_PARAMS(p0, p1, p2, p3)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3))
-#define GMOCK_INTERNAL_INIT_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3, p4##_type gmock_p4) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4))
-#define GMOCK_INTERNAL_INIT_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3, p4##_type gmock_p4, \
-        p5##_type gmock_p5) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
-        p5(::std::move(gmock_p5))
-#define GMOCK_INTERNAL_INIT_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3, p4##_type gmock_p4, p5##_type gmock_p5, \
-        p6##_type gmock_p6) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
-        p5(::std::move(gmock_p5)), p6(::std::move(gmock_p6))
-#define GMOCK_INTERNAL_INIT_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, p7)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3, p4##_type gmock_p4, p5##_type gmock_p5, \
-        p6##_type gmock_p6, p7##_type gmock_p7) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
-        p5(::std::move(gmock_p5)), p6(::std::move(gmock_p6)), \
-        p7(::std::move(gmock_p7))
-#define GMOCK_INTERNAL_INIT_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3, p4##_type gmock_p4, p5##_type gmock_p5, \
-        p6##_type gmock_p6, p7##_type gmock_p7, \
-        p8##_type gmock_p8) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
-        p5(::std::move(gmock_p5)), p6(::std::move(gmock_p6)), \
-        p7(::std::move(gmock_p7)), p8(::std::move(gmock_p8))
-#define GMOCK_INTERNAL_INIT_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8, p9)\
-    (p0##_type gmock_p0, p1##_type gmock_p1, p2##_type gmock_p2, \
-        p3##_type gmock_p3, p4##_type gmock_p4, p5##_type gmock_p5, \
-        p6##_type gmock_p6, p7##_type gmock_p7, p8##_type gmock_p8, \
-        p9##_type gmock_p9) : p0(::std::move(gmock_p0)), \
-        p1(::std::move(gmock_p1)), p2(::std::move(gmock_p2)), \
-        p3(::std::move(gmock_p3)), p4(::std::move(gmock_p4)), \
-        p5(::std::move(gmock_p5)), p6(::std::move(gmock_p6)), \
-        p7(::std::move(gmock_p7)), p8(::std::move(gmock_p8)), \
-        p9(::std::move(gmock_p9))
-
-// Defines the copy constructor
-#define GMOCK_INTERNAL_DEFN_COPY_AND_0_VALUE_PARAMS() \
-    {}  // Avoid https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82134
-#define GMOCK_INTERNAL_DEFN_COPY_AND_1_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_2_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_3_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_4_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_5_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_6_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_7_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_8_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_9_VALUE_PARAMS(...) = default;
-#define GMOCK_INTERNAL_DEFN_COPY_AND_10_VALUE_PARAMS(...) = default;
-
-// Declares the fields for storing the value parameters.
-#define GMOCK_INTERNAL_DEFN_AND_0_VALUE_PARAMS()
-#define GMOCK_INTERNAL_DEFN_AND_1_VALUE_PARAMS(p0) p0##_type p0;
-#define GMOCK_INTERNAL_DEFN_AND_2_VALUE_PARAMS(p0, p1) p0##_type p0; \
-    p1##_type p1;
-#define GMOCK_INTERNAL_DEFN_AND_3_VALUE_PARAMS(p0, p1, p2) p0##_type p0; \
-    p1##_type p1; p2##_type p2;
-#define GMOCK_INTERNAL_DEFN_AND_4_VALUE_PARAMS(p0, p1, p2, p3) p0##_type p0; \
-    p1##_type p1; p2##_type p2; p3##_type p3;
-#define GMOCK_INTERNAL_DEFN_AND_5_VALUE_PARAMS(p0, p1, p2, p3, \
-    p4) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; p4##_type p4;
-#define GMOCK_INTERNAL_DEFN_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, \
-    p5) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; p4##_type p4; \
-    p5##_type p5;
-#define GMOCK_INTERNAL_DEFN_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; p4##_type p4; \
-    p5##_type p5; p6##_type p6;
-#define GMOCK_INTERNAL_DEFN_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; p4##_type p4; \
-    p5##_type p5; p6##_type p6; p7##_type p7;
-#define GMOCK_INTERNAL_DEFN_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; \
-    p4##_type p4; p5##_type p5; p6##_type p6; p7##_type p7; p8##_type p8;
-#define GMOCK_INTERNAL_DEFN_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8, p9) p0##_type p0; p1##_type p1; p2##_type p2; p3##_type p3; \
-    p4##_type p4; p5##_type p5; p6##_type p6; p7##_type p7; p8##_type p8; \
-    p9##_type p9;
-
-// Lists the value parameters.
-#define GMOCK_INTERNAL_LIST_AND_0_VALUE_PARAMS()
-#define GMOCK_INTERNAL_LIST_AND_1_VALUE_PARAMS(p0) p0
-#define GMOCK_INTERNAL_LIST_AND_2_VALUE_PARAMS(p0, p1) p0, p1
-#define GMOCK_INTERNAL_LIST_AND_3_VALUE_PARAMS(p0, p1, p2) p0, p1, p2
-#define GMOCK_INTERNAL_LIST_AND_4_VALUE_PARAMS(p0, p1, p2, p3) p0, p1, p2, p3
-#define GMOCK_INTERNAL_LIST_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4) p0, p1, \
-    p2, p3, p4
-#define GMOCK_INTERNAL_LIST_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5) p0, \
-    p1, p2, p3, p4, p5
-#define GMOCK_INTERNAL_LIST_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6) p0, p1, p2, p3, p4, p5, p6
-#define GMOCK_INTERNAL_LIST_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7) p0, p1, p2, p3, p4, p5, p6, p7
-#define GMOCK_INTERNAL_LIST_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8) p0, p1, p2, p3, p4, p5, p6, p7, p8
-#define GMOCK_INTERNAL_LIST_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8, p9) p0, p1, p2, p3, p4, p5, p6, p7, p8, p9
-
-// Lists the value parameter types.
-#define GMOCK_INTERNAL_LIST_TYPE_AND_0_VALUE_PARAMS()
-#define GMOCK_INTERNAL_LIST_TYPE_AND_1_VALUE_PARAMS(p0) , p0##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_2_VALUE_PARAMS(p0, p1) , p0##_type, \
-    p1##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_3_VALUE_PARAMS(p0, p1, p2) , p0##_type, \
-    p1##_type, p2##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_4_VALUE_PARAMS(p0, p1, p2, p3) , \
-    p0##_type, p1##_type, p2##_type, p3##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4) , \
-    p0##_type, p1##_type, p2##_type, p3##_type, p4##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5) , \
-    p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, p5##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6) , p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, p5##_type, \
-    p6##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6, p7) , p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, \
-    p5##_type, p6##_type, p7##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6, p7, p8) , p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, \
-    p5##_type, p6##_type, p7##_type, p8##_type
-#define GMOCK_INTERNAL_LIST_TYPE_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6, p7, p8, p9) , p0##_type, p1##_type, p2##_type, p3##_type, p4##_type, \
-    p5##_type, p6##_type, p7##_type, p8##_type, p9##_type
-
-// Declares the value parameters.
-#define GMOCK_INTERNAL_DECL_AND_0_VALUE_PARAMS()
-#define GMOCK_INTERNAL_DECL_AND_1_VALUE_PARAMS(p0) p0##_type p0
-#define GMOCK_INTERNAL_DECL_AND_2_VALUE_PARAMS(p0, p1) p0##_type p0, \
-    p1##_type p1
-#define GMOCK_INTERNAL_DECL_AND_3_VALUE_PARAMS(p0, p1, p2) p0##_type p0, \
-    p1##_type p1, p2##_type p2
-#define GMOCK_INTERNAL_DECL_AND_4_VALUE_PARAMS(p0, p1, p2, p3) p0##_type p0, \
-    p1##_type p1, p2##_type p2, p3##_type p3
-#define GMOCK_INTERNAL_DECL_AND_5_VALUE_PARAMS(p0, p1, p2, p3, \
-    p4) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, p4##_type p4
-#define GMOCK_INTERNAL_DECL_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, \
-    p5) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, p4##_type p4, \
-    p5##_type p5
-#define GMOCK_INTERNAL_DECL_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, \
-    p6) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, p4##_type p4, \
-    p5##_type p5, p6##_type p6
-#define GMOCK_INTERNAL_DECL_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, p4##_type p4, \
-    p5##_type p5, p6##_type p6, p7##_type p7
-#define GMOCK_INTERNAL_DECL_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, \
-    p4##_type p4, p5##_type p5, p6##_type p6, p7##_type p7, p8##_type p8
-#define GMOCK_INTERNAL_DECL_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8, p9) p0##_type p0, p1##_type p1, p2##_type p2, p3##_type p3, \
-    p4##_type p4, p5##_type p5, p6##_type p6, p7##_type p7, p8##_type p8, \
-    p9##_type p9
-
-// The suffix of the class template implementing the action template.
-#define GMOCK_INTERNAL_COUNT_AND_0_VALUE_PARAMS()
-#define GMOCK_INTERNAL_COUNT_AND_1_VALUE_PARAMS(p0) P
-#define GMOCK_INTERNAL_COUNT_AND_2_VALUE_PARAMS(p0, p1) P2
-#define GMOCK_INTERNAL_COUNT_AND_3_VALUE_PARAMS(p0, p1, p2) P3
-#define GMOCK_INTERNAL_COUNT_AND_4_VALUE_PARAMS(p0, p1, p2, p3) P4
-#define GMOCK_INTERNAL_COUNT_AND_5_VALUE_PARAMS(p0, p1, p2, p3, p4) P5
-#define GMOCK_INTERNAL_COUNT_AND_6_VALUE_PARAMS(p0, p1, p2, p3, p4, p5) P6
-#define GMOCK_INTERNAL_COUNT_AND_7_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6) P7
-#define GMOCK_INTERNAL_COUNT_AND_8_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7) P8
-#define GMOCK_INTERNAL_COUNT_AND_9_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8) P9
-#define GMOCK_INTERNAL_COUNT_AND_10_VALUE_PARAMS(p0, p1, p2, p3, p4, p5, p6, \
-    p7, p8, p9) P10
-
-// The name of the class template implementing the action template.
-#define GMOCK_ACTION_CLASS_(name, value_params)\
-    GTEST_CONCAT_TOKEN_(name##Action, GMOCK_INTERNAL_COUNT_##value_params)
-
-#define ACTION_TEMPLATE(name, template_params, value_params)                   \
-  template <GMOCK_INTERNAL_DECL_##template_params                              \
-            GMOCK_INTERNAL_DECL_TYPE_##value_params>                           \
-  class GMOCK_ACTION_CLASS_(name, value_params) {                              \
-   public:                                                                     \
-    explicit GMOCK_ACTION_CLASS_(name, value_params)(                          \
-        GMOCK_INTERNAL_DECL_##value_params)                                    \
-        GMOCK_PP_IF(GMOCK_PP_IS_EMPTY(GMOCK_INTERNAL_COUNT_##value_params),    \
-                    = default; ,                                               \
-                    : impl_(std::make_shared<gmock_Impl>(                      \
-                                GMOCK_INTERNAL_LIST_##value_params)) { })      \
-    GMOCK_ACTION_CLASS_(name, value_params)(                                   \
-        const GMOCK_ACTION_CLASS_(name, value_params)&) noexcept               \
-        GMOCK_INTERNAL_DEFN_COPY_##value_params                                \
-    GMOCK_ACTION_CLASS_(name, value_params)(                                   \
-        GMOCK_ACTION_CLASS_(name, value_params)&&) noexcept                    \
-        GMOCK_INTERNAL_DEFN_COPY_##value_params                                \
-    template <typename F>                                                      \
-    operator ::testing::Action<F>() const {                                    \
-      return GMOCK_PP_IF(                                                      \
-          GMOCK_PP_IS_EMPTY(GMOCK_INTERNAL_COUNT_##value_params),              \
-                      (::testing::internal::MakeAction<F, gmock_Impl>()),      \
-                      (::testing::internal::MakeAction<F>(impl_)));            \
-    }                                                                          \
-   private:                                                                    \
-    class gmock_Impl {                                                         \
-     public:                                                                   \
-      explicit gmock_Impl GMOCK_INTERNAL_INIT_##value_params {}                \
-      template <typename function_type, typename return_type,                  \
-                typename args_type, GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>         \
-      return_type gmock_PerformImpl(GMOCK_ACTION_ARG_TYPES_AND_NAMES_) const;  \
-      GMOCK_INTERNAL_DEFN_##value_params                                       \
-    };                                                                         \
-    GMOCK_PP_IF(GMOCK_PP_IS_EMPTY(GMOCK_INTERNAL_COUNT_##value_params),        \
-                , std::shared_ptr<const gmock_Impl> impl_;)                    \
-  };                                                                           \
-  template <GMOCK_INTERNAL_DECL_##template_params                              \
-            GMOCK_INTERNAL_DECL_TYPE_##value_params>                           \
-  GMOCK_ACTION_CLASS_(name, value_params)<                                     \
-      GMOCK_INTERNAL_LIST_##template_params                                    \
-      GMOCK_INTERNAL_LIST_TYPE_##value_params> name(                           \
-          GMOCK_INTERNAL_DECL_##value_params) GTEST_MUST_USE_RESULT_;          \
-  template <GMOCK_INTERNAL_DECL_##template_params                              \
-            GMOCK_INTERNAL_DECL_TYPE_##value_params>                           \
-  inline GMOCK_ACTION_CLASS_(name, value_params)<                              \
-      GMOCK_INTERNAL_LIST_##template_params                                    \
-      GMOCK_INTERNAL_LIST_TYPE_##value_params> name(                           \
-          GMOCK_INTERNAL_DECL_##value_params) {                                \
-    return GMOCK_ACTION_CLASS_(name, value_params)<                            \
-        GMOCK_INTERNAL_LIST_##template_params                                  \
-        GMOCK_INTERNAL_LIST_TYPE_##value_params>(                              \
-            GMOCK_INTERNAL_LIST_##value_params);                               \
-  }                                                                            \
-  template <GMOCK_INTERNAL_DECL_##template_params                              \
-            GMOCK_INTERNAL_DECL_TYPE_##value_params>                           \
-  template <typename function_type, typename return_type, typename args_type,  \
-            GMOCK_ACTION_TEMPLATE_ARGS_NAMES_>                                 \
-  return_type GMOCK_ACTION_CLASS_(name, value_params)<                         \
-      GMOCK_INTERNAL_LIST_##template_params                                    \
-      GMOCK_INTERNAL_LIST_TYPE_##value_params>::gmock_Impl::gmock_PerformImpl( \
-          GMOCK_ACTION_ARG_TYPES_AND_NAMES_UNUSED_) const
-
-namespace testing {
-
-// The ACTION*() macros trigger warning C4100 (unreferenced formal
-// parameter) in MSVC with -W4.  Unfortunately they cannot be fixed in
-// the macro definition, as the warnings are generated when the macro
-// is expanded and macro expansion cannot contain #pragma.  Therefore
-// we suppress them here.
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4100)
-#endif
-
-namespace internal {
-
-// internal::InvokeArgument - a helper for InvokeArgument action.
-// The basic overloads are provided here for generic functors.
-// Overloads for other custom-callables are provided in the
-// internal/custom/gmock-generated-actions.h header.
-template <typename F, typename... Args>
-auto InvokeArgument(F f, Args... args) -> decltype(f(args...)) {
-  return f(args...);
-}
-
-template <std::size_t index, typename... Params>
-struct InvokeArgumentAction {
-  template <typename... Args>
-  auto operator()(Args&&... args) const -> decltype(internal::InvokeArgument(
-      std::get<index>(std::forward_as_tuple(std::forward<Args>(args)...)),
-      std::declval<const Params&>()...)) {
-    internal::FlatTuple<Args&&...> args_tuple(FlatTupleConstructTag{},
-                                              std::forward<Args>(args)...);
-    return params.Apply([&](const Params&... unpacked_params) {
-      auto&& callable = args_tuple.template Get<index>();
-      return internal::InvokeArgument(
-          std::forward<decltype(callable)>(callable), unpacked_params...);
-    });
-  }
-
-  internal::FlatTuple<Params...> params;
-};
-
-}  // namespace internal
-
-// The InvokeArgument<N>(a1, a2, ..., a_k) action invokes the N-th
-// (0-based) argument, which must be a k-ary callable, of the mock
-// function, with arguments a1, a2, ..., a_k.
-//
-// Notes:
-//
-//   1. The arguments are passed by value by default.  If you need to
-//   pass an argument by reference, wrap it inside std::ref().  For
-//   example,
-//
-//     InvokeArgument<1>(5, string("Hello"), std::ref(foo))
-//
-//   passes 5 and string("Hello") by value, and passes foo by
-//   reference.
-//
-//   2. If the callable takes an argument by reference but std::ref() is
-//   not used, it will receive the reference to a copy of the value,
-//   instead of the original value.  For example, when the 0-th
-//   argument of the mock function takes a const string&, the action
-//
-//     InvokeArgument<0>(string("Hello"))
-//
-//   makes a copy of the temporary string("Hello") object and passes a
-//   reference of the copy, instead of the original temporary object,
-//   to the callable.  This makes it easy for a user to define an
-//   InvokeArgument action from temporary values and have it performed
-//   later.
-template <std::size_t index, typename... Params>
-internal::InvokeArgumentAction<index, typename std::decay<Params>::type...>
-InvokeArgument(Params&&... params) {
-  return {internal::FlatTuple<typename std::decay<Params>::type...>(
-      internal::FlatTupleConstructTag{}, std::forward<Params>(params)...)};
-}
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
-
-}  // namespace testing
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
-// Copyright 2013, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file implements some matchers that depend on gmock-matchers.h.
-//
-// Note that tests are implemented in gmock-matchers_test.cc rather than
-// gmock-more-matchers-test.cc.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_MATCHERS_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_MATCHERS_H_
-
-
-namespace testing {
-
-// Silence C4100 (unreferenced formal
-// parameter) for MSVC
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4100)
-#if (_MSC_VER == 1900)
-// and silence C4800 (C4800: 'int *const ': forcing value
-// to bool 'true' or 'false') for MSVC 14
-# pragma warning(disable:4800)
-  #endif
-#endif
-
-// Defines a matcher that matches an empty container. The container must
-// support both size() and empty(), which all STL-like containers provide.
-MATCHER(IsEmpty, negation ? "isn't empty" : "is empty") {
-  if (arg.empty()) {
-    return true;
-  }
-  *result_listener << "whose size is " << arg.size();
-  return false;
-}
-
-// Define a matcher that matches a value that evaluates in boolean
-// context to true.  Useful for types that define "explicit operator
-// bool" operators and so can't be compared for equality with true
-// and false.
-MATCHER(IsTrue, negation ? "is false" : "is true") {
-  return static_cast<bool>(arg);
-}
-
-// Define a matcher that matches a value that evaluates in boolean
-// context to false.  Useful for types that define "explicit operator
-// bool" operators and so can't be compared for equality with true
-// and false.
-MATCHER(IsFalse, negation ? "is true" : "is false") {
-  return !static_cast<bool>(arg);
-}
-
-#ifdef _MSC_VER
-# pragma warning(pop)
-#endif
-
-
-}  // namespace testing
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_MATCHERS_H_
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Implements class templates NiceMock, NaggyMock, and StrictMock.
-//
-// Given a mock class MockFoo that is created using Google Mock,
-// NiceMock<MockFoo> is a subclass of MockFoo that allows
-// uninteresting calls (i.e. calls to mock methods that have no
-// EXPECT_CALL specs), NaggyMock<MockFoo> is a subclass of MockFoo
-// that prints a warning when an uninteresting call occurs, and
-// StrictMock<MockFoo> is a subclass of MockFoo that treats all
-// uninteresting calls as errors.
-//
-// Currently a mock is naggy by default, so MockFoo and
-// NaggyMock<MockFoo> behave like the same.  However, we will soon
-// switch the default behavior of mocks to be nice, as that in general
-// leads to more maintainable tests.  When that happens, MockFoo will
-// stop behaving like NaggyMock<MockFoo> and start behaving like
-// NiceMock<MockFoo>.
-//
-// NiceMock, NaggyMock, and StrictMock "inherit" the constructors of
-// their respective base class.  Therefore you can write
-// NiceMock<MockFoo>(5, "a") to construct a nice mock where MockFoo
-// has a constructor that accepts (int, const char*), for example.
-//
-// A known limitation is that NiceMock<MockFoo>, NaggyMock<MockFoo>,
-// and StrictMock<MockFoo> only works for mock methods defined using
-// the MOCK_METHOD* family of macros DIRECTLY in the MockFoo class.
-// If a mock method is defined in a base class of MockFoo, the "nice"
-// or "strict" modifier may not affect it, depending on the compiler.
-// In particular, nesting NiceMock, NaggyMock, and StrictMock is NOT
-// supported.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_NICE_STRICT_H_
-#define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_NICE_STRICT_H_
-
-#include <type_traits>
-
-
-namespace testing {
-template <class MockClass>
-class NiceMock;
-template <class MockClass>
-class NaggyMock;
-template <class MockClass>
-class StrictMock;
-
-namespace internal {
-template <typename T>
-std::true_type StrictnessModifierProbe(const NiceMock<T>&);
-template <typename T>
-std::true_type StrictnessModifierProbe(const NaggyMock<T>&);
-template <typename T>
-std::true_type StrictnessModifierProbe(const StrictMock<T>&);
-std::false_type StrictnessModifierProbe(...);
-
-template <typename T>
-constexpr bool HasStrictnessModifier() {
-  return decltype(StrictnessModifierProbe(std::declval<const T&>()))::value;
-}
-
-// Base classes that register and deregister with testing::Mock to alter the
-// default behavior around uninteresting calls. Inheriting from one of these
-// classes first and then MockClass ensures the MockClass constructor is run
-// after registration, and that the MockClass destructor runs before
-// deregistration. This guarantees that MockClass's constructor and destructor
-// run with the same level of strictness as its instance methods.
-
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW && \
-    (defined(_MSC_VER) || defined(__clang__))
-// We need to mark these classes with this declspec to ensure that
-// the empty base class optimization is performed.
-#define GTEST_INTERNAL_EMPTY_BASE_CLASS __declspec(empty_bases)
-#else
-#define GTEST_INTERNAL_EMPTY_BASE_CLASS
-#endif
-
-template <typename Base>
-class NiceMockImpl {
- public:
-  NiceMockImpl() { ::testing::Mock::AllowUninterestingCalls(this); }
-
-  ~NiceMockImpl() { ::testing::Mock::UnregisterCallReaction(this); }
-};
-
-template <typename Base>
-class NaggyMockImpl {
- public:
-  NaggyMockImpl() { ::testing::Mock::WarnUninterestingCalls(this); }
-
-  ~NaggyMockImpl() { ::testing::Mock::UnregisterCallReaction(this); }
-};
-
-template <typename Base>
-class StrictMockImpl {
- public:
-  StrictMockImpl() { ::testing::Mock::FailUninterestingCalls(this); }
-
-  ~StrictMockImpl() { ::testing::Mock::UnregisterCallReaction(this); }
-};
-
-}  // namespace internal
-
-template <class MockClass>
-class GTEST_INTERNAL_EMPTY_BASE_CLASS NiceMock
-    : private internal::NiceMockImpl<MockClass>,
-      public MockClass {
- public:
-  static_assert(!internal::HasStrictnessModifier<MockClass>(),
-                "Can't apply NiceMock to a class hierarchy that already has a "
-                "strictness modifier. See "
-                "https://google.github.io/googletest/"
-                "gmock_cook_book.html#NiceStrictNaggy");
-  NiceMock() : MockClass() {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
-  // Ideally, we would inherit base class's constructors through a using
-  // declaration, which would preserve their visibility. However, many existing
-  // tests rely on the fact that current implementation reexports protected
-  // constructors as public. These tests would need to be cleaned up first.
-
-  // Single argument constructor is special-cased so that it can be
-  // made explicit.
-  template <typename A>
-  explicit NiceMock(A&& arg) : MockClass(std::forward<A>(arg)) {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
-  template <typename TArg1, typename TArg2, typename... An>
-  NiceMock(TArg1&& arg1, TArg2&& arg2, An&&... args)
-      : MockClass(std::forward<TArg1>(arg1), std::forward<TArg2>(arg2),
-                  std::forward<An>(args)...) {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(NiceMock);
-};
-
-template <class MockClass>
-class GTEST_INTERNAL_EMPTY_BASE_CLASS NaggyMock
-    : private internal::NaggyMockImpl<MockClass>,
-      public MockClass {
-  static_assert(!internal::HasStrictnessModifier<MockClass>(),
-                "Can't apply NaggyMock to a class hierarchy that already has a "
-                "strictness modifier. See "
-                "https://google.github.io/googletest/"
-                "gmock_cook_book.html#NiceStrictNaggy");
-
- public:
-  NaggyMock() : MockClass() {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
-  // Ideally, we would inherit base class's constructors through a using
-  // declaration, which would preserve their visibility. However, many existing
-  // tests rely on the fact that current implementation reexports protected
-  // constructors as public. These tests would need to be cleaned up first.
-
-  // Single argument constructor is special-cased so that it can be
-  // made explicit.
-  template <typename A>
-  explicit NaggyMock(A&& arg) : MockClass(std::forward<A>(arg)) {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
-  template <typename TArg1, typename TArg2, typename... An>
-  NaggyMock(TArg1&& arg1, TArg2&& arg2, An&&... args)
-      : MockClass(std::forward<TArg1>(arg1), std::forward<TArg2>(arg2),
-                  std::forward<An>(args)...) {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(NaggyMock);
-};
-
-template <class MockClass>
-class GTEST_INTERNAL_EMPTY_BASE_CLASS StrictMock
-    : private internal::StrictMockImpl<MockClass>,
-      public MockClass {
- public:
-  static_assert(
-      !internal::HasStrictnessModifier<MockClass>(),
-      "Can't apply StrictMock to a class hierarchy that already has a "
-      "strictness modifier. See "
-      "https://google.github.io/googletest/"
-      "gmock_cook_book.html#NiceStrictNaggy");
-  StrictMock() : MockClass() {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
-  // Ideally, we would inherit base class's constructors through a using
-  // declaration, which would preserve their visibility. However, many existing
-  // tests rely on the fact that current implementation reexports protected
-  // constructors as public. These tests would need to be cleaned up first.
-
-  // Single argument constructor is special-cased so that it can be
-  // made explicit.
-  template <typename A>
-  explicit StrictMock(A&& arg) : MockClass(std::forward<A>(arg)) {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
-  template <typename TArg1, typename TArg2, typename... An>
-  StrictMock(TArg1&& arg1, TArg2&& arg2, An&&... args)
-      : MockClass(std::forward<TArg1>(arg1), std::forward<TArg2>(arg2),
-                  std::forward<An>(args)...) {
-    static_assert(sizeof(*this) == sizeof(MockClass),
-                  "The impl subclass shouldn't introduce any padding");
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(StrictMock);
-};
-
-#undef GTEST_INTERNAL_EMPTY_BASE_CLASS
-
-}  // namespace testing
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_NICE_STRICT_H_
-
-namespace testing {
-
-// Declares Google Mock flags that we want a user to use programmatically.
-GMOCK_DECLARE_bool_(catch_leaked_mocks);
-GMOCK_DECLARE_string_(verbose);
-GMOCK_DECLARE_int32_(default_mock_behavior);
-
-// Initializes Google Mock.  This must be called before running the
-// tests.  In particular, it parses the command line for the flags
-// that Google Mock recognizes.  Whenever a Google Mock flag is seen,
-// it is removed from argv, and *argc is decremented.
-//
-// No value is returned.  Instead, the Google Mock flag variables are
-// updated.
-//
-// Since Google Test is needed for Google Mock to work, this function
-// also initializes Google Test and parses its flags, if that hasn't
-// been done.
-GTEST_API_ void InitGoogleMock(int* argc, char** argv);
-
-// This overloaded version can be used in Windows programs compiled in
-// UNICODE mode.
-GTEST_API_ void InitGoogleMock(int* argc, wchar_t** argv);
-
-// This overloaded version can be used on Arduino/embedded platforms where
-// there is no argc/argv.
-GTEST_API_ void InitGoogleMock();
-
-}  // namespace testing
-
-#endif  // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_H_
diff --git a/3rdparty/fmt/test/gtest/gtest/gtest-spi.h b/3rdparty/fmt/test/gtest/gtest/gtest-spi.h
deleted file mode 100644
index eacef446..00000000
--- a/3rdparty/fmt/test/gtest/gtest/gtest-spi.h
+++ /dev/null
@@ -1,238 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Utilities for testing Google Test itself and code that uses Google Test
-// (e.g. frameworks built on top of Google Test).
-
-// GOOGLETEST_CM0004 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
-
-#include "gtest/gtest.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// This helper class can be used to mock out Google Test failure reporting
-// so that we can test Google Test or code that builds on Google Test.
-//
-// An object of this class appends a TestPartResult object to the
-// TestPartResultArray object given in the constructor whenever a Google Test
-// failure is reported. It can either intercept only failures that are
-// generated in the same thread that created this object or it can intercept
-// all generated failures. The scope of this mock object can be controlled with
-// the second argument to the two arguments constructor.
-class GTEST_API_ ScopedFakeTestPartResultReporter
-    : public TestPartResultReporterInterface {
- public:
-  // The two possible mocking modes of this object.
-  enum InterceptMode {
-    INTERCEPT_ONLY_CURRENT_THREAD,  // Intercepts only thread local failures.
-    INTERCEPT_ALL_THREADS           // Intercepts all failures.
-  };
-
-  // The c'tor sets this object as the test part result reporter used
-  // by Google Test.  The 'result' parameter specifies where to report the
-  // results. This reporter will only catch failures generated in the current
-  // thread. DEPRECATED
-  explicit ScopedFakeTestPartResultReporter(TestPartResultArray* result);
-
-  // Same as above, but you can choose the interception scope of this object.
-  ScopedFakeTestPartResultReporter(InterceptMode intercept_mode,
-                                   TestPartResultArray* result);
-
-  // The d'tor restores the previous test part result reporter.
-  ~ScopedFakeTestPartResultReporter() override;
-
-  // Appends the TestPartResult object to the TestPartResultArray
-  // received in the constructor.
-  //
-  // This method is from the TestPartResultReporterInterface
-  // interface.
-  void ReportTestPartResult(const TestPartResult& result) override;
-
- private:
-  void Init();
-
-  const InterceptMode intercept_mode_;
-  TestPartResultReporterInterface* old_reporter_;
-  TestPartResultArray* const result_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedFakeTestPartResultReporter);
-};
-
-namespace internal {
-
-// A helper class for implementing EXPECT_FATAL_FAILURE() and
-// EXPECT_NONFATAL_FAILURE().  Its destructor verifies that the given
-// TestPartResultArray contains exactly one failure that has the given
-// type and contains the given substring.  If that's not the case, a
-// non-fatal failure will be generated.
-class GTEST_API_ SingleFailureChecker {
- public:
-  // The constructor remembers the arguments.
-  SingleFailureChecker(const TestPartResultArray* results,
-                       TestPartResult::Type type, const std::string& substr);
-  ~SingleFailureChecker();
- private:
-  const TestPartResultArray* const results_;
-  const TestPartResult::Type type_;
-  const std::string substr_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(SingleFailureChecker);
-};
-
-}  // namespace internal
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// A set of macros for testing Google Test assertions or code that's expected
-// to generate Google Test fatal failures.  It verifies that the given
-// statement will cause exactly one fatal Google Test failure with 'substr'
-// being part of the failure message.
-//
-// There are two different versions of this macro. EXPECT_FATAL_FAILURE only
-// affects and considers failures generated in the current thread and
-// EXPECT_FATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
-//
-// The verification of the assertion is done correctly even when the statement
-// throws an exception or aborts the current function.
-//
-// Known restrictions:
-//   - 'statement' cannot reference local non-static variables or
-//     non-static members of the current object.
-//   - 'statement' cannot return a value.
-//   - You cannot stream a failure message to this macro.
-//
-// Note that even though the implementations of the following two
-// macros are much alike, we cannot refactor them to use a common
-// helper macro, due to some peculiarity in how the preprocessor
-// works.  The AcceptsMacroThatExpandsToUnprotectedComma test in
-// gtest_unittest.cc will fail to compile if we do that.
-#define EXPECT_FATAL_FAILURE(statement, substr) \
-  do { \
-    class GTestExpectFatalFailureHelper {\
-     public:\
-      static void Execute() { statement; }\
-    };\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
-      GTestExpectFatalFailureHelper::Execute();\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#define EXPECT_FATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
-  do { \
-    class GTestExpectFatalFailureHelper {\
-     public:\
-      static void Execute() { statement; }\
-    };\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ALL_THREADS, &gtest_failures);\
-      GTestExpectFatalFailureHelper::Execute();\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-// A macro for testing Google Test assertions or code that's expected to
-// generate Google Test non-fatal failures.  It asserts that the given
-// statement will cause exactly one non-fatal Google Test failure with 'substr'
-// being part of the failure message.
-//
-// There are two different versions of this macro. EXPECT_NONFATAL_FAILURE only
-// affects and considers failures generated in the current thread and
-// EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
-//
-// 'statement' is allowed to reference local variables and members of
-// the current object.
-//
-// The verification of the assertion is done correctly even when the statement
-// throws an exception or aborts the current function.
-//
-// Known restrictions:
-//   - You cannot stream a failure message to this macro.
-//
-// Note that even though the implementations of the following two
-// macros are much alike, we cannot refactor them to use a common
-// helper macro, due to some peculiarity in how the preprocessor
-// works.  If we do that, the code won't compile when the user gives
-// EXPECT_NONFATAL_FAILURE() a statement that contains a macro that
-// expands to code containing an unprotected comma.  The
-// AcceptsMacroThatExpandsToUnprotectedComma test in gtest_unittest.cc
-// catches that.
-//
-// For the same reason, we have to write
-//   if (::testing::internal::AlwaysTrue()) { statement; }
-// instead of
-//   GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
-// to avoid an MSVC warning on unreachable code.
-#define EXPECT_NONFATAL_FAILURE(statement, substr) \
-  do {\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
-        (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
-      if (::testing::internal::AlwaysTrue()) { statement; }\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#define EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
-  do {\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
-        (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter::INTERCEPT_ALL_THREADS, \
-          &gtest_failures);\
-      if (::testing::internal::AlwaysTrue()) { statement; }\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_SPI_H_
diff --git a/3rdparty/fmt/test/gtest/gtest/gtest.h b/3rdparty/fmt/test/gtest/gtest/gtest.h
deleted file mode 100644
index 55a31d0a..00000000
--- a/3rdparty/fmt/test/gtest/gtest/gtest.h
+++ /dev/null
@@ -1,12398 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the public API for Google Test.  It should be
-// included by any test program that uses Google Test.
-//
-// IMPORTANT NOTE: Due to limitation of the C++ language, we have to
-// leave some internal implementation details in this header file.
-// They are clearly marked by comments like this:
-//
-//   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-//
-// Such code is NOT meant to be used by a user directly, and is subject
-// to CHANGE WITHOUT NOTICE.  Therefore DO NOT DEPEND ON IT in a user
-// program!
-//
-// Acknowledgment: Google Test borrowed the idea of automatic test
-// registration from Barthelemy Dagenais' (barthelemy@prologique.com)
-// easyUnit framework.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_H_
-
-#include <cstddef>
-#include <limits>
-#include <memory>
-#include <ostream>
-#include <type_traits>
-#include <vector>
-
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file declares functions and macros used internally by
-// Google Test.  They are subject to change without notice.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
-
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Low-level types and utilities for porting Google Test to various
-// platforms.  All macros ending with _ and symbols defined in an
-// internal namespace are subject to change without notice.  Code
-// outside Google Test MUST NOT USE THEM DIRECTLY.  Macros that don't
-// end with _ are part of Google Test's public API and can be used by
-// code outside Google Test.
-//
-// This file is fundamental to Google Test.  All other Google Test source
-// files are expected to #include this.  Therefore, it cannot #include
-// any other Google Test header.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
-
-// Environment-describing macros
-// -----------------------------
-//
-// Google Test can be used in many different environments.  Macros in
-// this section tell Google Test what kind of environment it is being
-// used in, such that Google Test can provide environment-specific
-// features and implementations.
-//
-// Google Test tries to automatically detect the properties of its
-// environment, so users usually don't need to worry about these
-// macros.  However, the automatic detection is not perfect.
-// Sometimes it's necessary for a user to define some of the following
-// macros in the build script to override Google Test's decisions.
-//
-// If the user doesn't define a macro in the list, Google Test will
-// provide a default definition.  After this header is #included, all
-// macros in this list will be defined to either 1 or 0.
-//
-// Notes to maintainers:
-//   - Each macro here is a user-tweakable knob; do not grow the list
-//     lightly.
-//   - Use #if to key off these macros.  Don't use #ifdef or "#if
-//     defined(...)", which will not work as these macros are ALWAYS
-//     defined.
-//
-//   GTEST_HAS_CLONE          - Define it to 1/0 to indicate that clone(2)
-//                              is/isn't available.
-//   GTEST_HAS_EXCEPTIONS     - Define it to 1/0 to indicate that exceptions
-//                              are enabled.
-//   GTEST_HAS_POSIX_RE       - Define it to 1/0 to indicate that POSIX regular
-//                              expressions are/aren't available.
-//   GTEST_HAS_PTHREAD        - Define it to 1/0 to indicate that <pthread.h>
-//                              is/isn't available.
-//   GTEST_HAS_RTTI           - Define it to 1/0 to indicate that RTTI is/isn't
-//                              enabled.
-//   GTEST_HAS_STD_WSTRING    - Define it to 1/0 to indicate that
-//                              std::wstring does/doesn't work (Google Test can
-//                              be used where std::wstring is unavailable).
-//   GTEST_HAS_SEH            - Define it to 1/0 to indicate whether the
-//                              compiler supports Microsoft's "Structured
-//                              Exception Handling".
-//   GTEST_HAS_STREAM_REDIRECTION
-//                            - Define it to 1/0 to indicate whether the
-//                              platform supports I/O stream redirection using
-//                              dup() and dup2().
-//   GTEST_LINKED_AS_SHARED_LIBRARY
-//                            - Define to 1 when compiling tests that use
-//                              Google Test as a shared library (known as
-//                              DLL on Windows).
-//   GTEST_CREATE_SHARED_LIBRARY
-//                            - Define to 1 when compiling Google Test itself
-//                              as a shared library.
-//   GTEST_DEFAULT_DEATH_TEST_STYLE
-//                            - The default value of --gtest_death_test_style.
-//                              The legacy default has been "fast" in the open
-//                              source version since 2008. The recommended value
-//                              is "threadsafe", and can be set in
-//                              custom/gtest-port.h.
-
-// Platform-indicating macros
-// --------------------------
-//
-// Macros indicating the platform on which Google Test is being used
-// (a macro is defined to 1 if compiled on the given platform;
-// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
-// defines these macros automatically.  Code outside Google Test MUST
-// NOT define them.
-//
-//   GTEST_OS_AIX      - IBM AIX
-//   GTEST_OS_CYGWIN   - Cygwin
-//   GTEST_OS_DRAGONFLY - DragonFlyBSD
-//   GTEST_OS_FREEBSD  - FreeBSD
-//   GTEST_OS_FUCHSIA  - Fuchsia
-//   GTEST_OS_GNU_KFREEBSD - GNU/kFreeBSD
-//   GTEST_OS_HAIKU    - Haiku
-//   GTEST_OS_HPUX     - HP-UX
-//   GTEST_OS_LINUX    - Linux
-//     GTEST_OS_LINUX_ANDROID - Google Android
-//   GTEST_OS_MAC      - Mac OS X
-//     GTEST_OS_IOS    - iOS
-//   GTEST_OS_NACL     - Google Native Client (NaCl)
-//   GTEST_OS_NETBSD   - NetBSD
-//   GTEST_OS_OPENBSD  - OpenBSD
-//   GTEST_OS_OS2      - OS/2
-//   GTEST_OS_QNX      - QNX
-//   GTEST_OS_SOLARIS  - Sun Solaris
-//   GTEST_OS_WINDOWS  - Windows (Desktop, MinGW, or Mobile)
-//     GTEST_OS_WINDOWS_DESKTOP  - Windows Desktop
-//     GTEST_OS_WINDOWS_MINGW    - MinGW
-//     GTEST_OS_WINDOWS_MOBILE   - Windows Mobile
-//     GTEST_OS_WINDOWS_PHONE    - Windows Phone
-//     GTEST_OS_WINDOWS_RT       - Windows Store App/WinRT
-//   GTEST_OS_ZOS      - z/OS
-//
-// Among the platforms, Cygwin, Linux, Mac OS X, and Windows have the
-// most stable support.  Since core members of the Google Test project
-// don't have access to other platforms, support for them may be less
-// stable.  If you notice any problems on your platform, please notify
-// googletestframework@googlegroups.com (patches for fixing them are
-// even more welcome!).
-//
-// It is possible that none of the GTEST_OS_* macros are defined.
-
-// Feature-indicating macros
-// -------------------------
-//
-// Macros indicating which Google Test features are available (a macro
-// is defined to 1 if the corresponding feature is supported;
-// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
-// defines these macros automatically.  Code outside Google Test MUST
-// NOT define them.
-//
-// These macros are public so that portable tests can be written.
-// Such tests typically surround code using a feature with an #if
-// which controls that code.  For example:
-//
-// #if GTEST_HAS_DEATH_TEST
-//   EXPECT_DEATH(DoSomethingDeadly());
-// #endif
-//
-//   GTEST_HAS_DEATH_TEST   - death tests
-//   GTEST_HAS_TYPED_TEST   - typed tests
-//   GTEST_HAS_TYPED_TEST_P - type-parameterized tests
-//   GTEST_IS_THREADSAFE    - Google Test is thread-safe.
-//   GOOGLETEST_CM0007 DO NOT DELETE
-//   GTEST_USES_POSIX_RE    - enhanced POSIX regex is used. Do not confuse with
-//                            GTEST_HAS_POSIX_RE (see above) which users can
-//                            define themselves.
-//   GTEST_USES_SIMPLE_RE   - our own simple regex is used;
-//                            the above RE\b(s) are mutually exclusive.
-
-// Misc public macros
-// ------------------
-//
-//   GTEST_FLAG(flag_name)  - references the variable corresponding to
-//                            the given Google Test flag.
-
-// Internal utilities
-// ------------------
-//
-// The following macros and utilities are for Google Test's INTERNAL
-// use only.  Code outside Google Test MUST NOT USE THEM DIRECTLY.
-//
-// Macros for basic C++ coding:
-//   GTEST_AMBIGUOUS_ELSE_BLOCKER_ - for disabling a gcc warning.
-//   GTEST_ATTRIBUTE_UNUSED_  - declares that a class' instances or a
-//                              variable don't have to be used.
-//   GTEST_DISALLOW_ASSIGN_   - disables copy operator=.
-//   GTEST_DISALLOW_COPY_AND_ASSIGN_ - disables copy ctor and operator=.
-//   GTEST_DISALLOW_MOVE_ASSIGN_   - disables move operator=.
-//   GTEST_DISALLOW_MOVE_AND_ASSIGN_ - disables move ctor and operator=.
-//   GTEST_MUST_USE_RESULT_   - declares that a function's result must be used.
-//   GTEST_INTENTIONAL_CONST_COND_PUSH_ - start code section where MSVC C4127 is
-//                                        suppressed (constant conditional).
-//   GTEST_INTENTIONAL_CONST_COND_POP_  - finish code section where MSVC C4127
-//                                        is suppressed.
-//   GTEST_INTERNAL_HAS_ANY - for enabling UniversalPrinter<std::any> or
-//                            UniversalPrinter<absl::any> specializations.
-//   GTEST_INTERNAL_HAS_OPTIONAL - for enabling UniversalPrinter<std::optional>
-//   or
-//                                 UniversalPrinter<absl::optional>
-//                                 specializations.
-//   GTEST_INTERNAL_HAS_STRING_VIEW - for enabling Matcher<std::string_view> or
-//                                    Matcher<absl::string_view>
-//                                    specializations.
-//   GTEST_INTERNAL_HAS_VARIANT - for enabling UniversalPrinter<std::variant> or
-//                                UniversalPrinter<absl::variant>
-//                                specializations.
-//
-// Synchronization:
-//   Mutex, MutexLock, ThreadLocal, GetThreadCount()
-//                            - synchronization primitives.
-//
-// Regular expressions:
-//   RE             - a simple regular expression class using the POSIX
-//                    Extended Regular Expression syntax on UNIX-like platforms
-//                    GOOGLETEST_CM0008 DO NOT DELETE
-//                    or a reduced regular exception syntax on other
-//                    platforms, including Windows.
-// Logging:
-//   GTEST_LOG_()   - logs messages at the specified severity level.
-//   LogToStderr()  - directs all log messages to stderr.
-//   FlushInfoLog() - flushes informational log messages.
-//
-// Stdout and stderr capturing:
-//   CaptureStdout()     - starts capturing stdout.
-//   GetCapturedStdout() - stops capturing stdout and returns the captured
-//                         string.
-//   CaptureStderr()     - starts capturing stderr.
-//   GetCapturedStderr() - stops capturing stderr and returns the captured
-//                         string.
-//
-// Integer types:
-//   TypeWithSize   - maps an integer to a int type.
-//   TimeInMillis   - integers of known sizes.
-//   BiggestInt     - the biggest signed integer type.
-//
-// Command-line utilities:
-//   GTEST_DECLARE_*()  - declares a flag.
-//   GTEST_DEFINE_*()   - defines a flag.
-//   GetInjectableArgvs() - returns the command line as a vector of strings.
-//
-// Environment variable utilities:
-//   GetEnv()             - gets the value of an environment variable.
-//   BoolFromGTestEnv()   - parses a bool environment variable.
-//   Int32FromGTestEnv()  - parses an int32_t environment variable.
-//   StringFromGTestEnv() - parses a string environment variable.
-//
-// Deprecation warnings:
-//   GTEST_INTERNAL_DEPRECATED(message) - attribute marking a function as
-//                                        deprecated; calling a marked function
-//                                        should generate a compiler warning
-
-#include <ctype.h>   // for isspace, etc
-#include <stddef.h>  // for ptrdiff_t
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <cerrno>
-#include <cstdint>
-#include <limits>
-#include <type_traits>
-
-#ifndef _WIN32_WCE
-# include <sys/types.h>
-# include <sys/stat.h>
-#endif  // !_WIN32_WCE
-
-#if defined __APPLE__
-# include <AvailabilityMacros.h>
-# include <TargetConditionals.h>
-#endif
-
-#include <iostream>  // NOLINT
-#include <locale>
-#include <memory>
-#include <string>  // NOLINT
-#include <tuple>
-#include <vector>  // NOLINT
-
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Injection point for custom user configurations. See README for details
-//
-// ** Custom implementation starts here **
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the GTEST_OS_* macro.
-// It is separate from gtest-port.h so that custom/gtest-port.h can include it.
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
-
-// Determines the platform on which Google Test is compiled.
-#ifdef __CYGWIN__
-# define GTEST_OS_CYGWIN 1
-# elif defined(__MINGW__) || defined(__MINGW32__) || defined(__MINGW64__)
-#  define GTEST_OS_WINDOWS_MINGW 1
-#  define GTEST_OS_WINDOWS 1
-#elif defined _WIN32
-# define GTEST_OS_WINDOWS 1
-# ifdef _WIN32_WCE
-#  define GTEST_OS_WINDOWS_MOBILE 1
-# elif defined(WINAPI_FAMILY)
-#  include <winapifamily.h>
-#  if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
-#   define GTEST_OS_WINDOWS_DESKTOP 1
-#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE_APP)
-#   define GTEST_OS_WINDOWS_PHONE 1
-#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
-#   define GTEST_OS_WINDOWS_RT 1
-#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_TV_TITLE)
-#   define GTEST_OS_WINDOWS_PHONE 1
-#   define GTEST_OS_WINDOWS_TV_TITLE 1
-#  else
-    // WINAPI_FAMILY defined but no known partition matched.
-    // Default to desktop.
-#   define GTEST_OS_WINDOWS_DESKTOP 1
-#  endif
-# else
-#  define GTEST_OS_WINDOWS_DESKTOP 1
-# endif  // _WIN32_WCE
-#elif defined __OS2__
-# define GTEST_OS_OS2 1
-#elif defined __APPLE__
-# define GTEST_OS_MAC 1
-# include <TargetConditionals.h>
-# if TARGET_OS_IPHONE
-#  define GTEST_OS_IOS 1
-# endif
-#elif defined __DragonFly__
-# define GTEST_OS_DRAGONFLY 1
-#elif defined __FreeBSD__
-# define GTEST_OS_FREEBSD 1
-#elif defined __Fuchsia__
-# define GTEST_OS_FUCHSIA 1
-#elif defined(__GLIBC__) && defined(__FreeBSD_kernel__)
-# define GTEST_OS_GNU_KFREEBSD 1
-#elif defined __linux__
-# define GTEST_OS_LINUX 1
-# if defined __ANDROID__
-#  define GTEST_OS_LINUX_ANDROID 1
-# endif
-#elif defined __MVS__
-# define GTEST_OS_ZOS 1
-#elif defined(__sun) && defined(__SVR4)
-# define GTEST_OS_SOLARIS 1
-#elif defined(_AIX)
-# define GTEST_OS_AIX 1
-#elif defined(__hpux)
-# define GTEST_OS_HPUX 1
-#elif defined __native_client__
-# define GTEST_OS_NACL 1
-#elif defined __NetBSD__
-# define GTEST_OS_NETBSD 1
-#elif defined __OpenBSD__
-# define GTEST_OS_OPENBSD 1
-#elif defined __QNX__
-# define GTEST_OS_QNX 1
-#elif defined(__HAIKU__)
-#define GTEST_OS_HAIKU 1
-#elif defined ESP8266
-#define GTEST_OS_ESP8266 1
-#elif defined ESP32
-#define GTEST_OS_ESP32 1
-#elif defined(__XTENSA__)
-#define GTEST_OS_XTENSA 1
-#endif  // __CYGWIN__
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
-
-#if !defined(GTEST_DEV_EMAIL_)
-# define GTEST_DEV_EMAIL_ "googletestframework@@googlegroups.com"
-# define GTEST_FLAG_PREFIX_ "gtest_"
-# define GTEST_FLAG_PREFIX_DASH_ "gtest-"
-# define GTEST_FLAG_PREFIX_UPPER_ "GTEST_"
-# define GTEST_NAME_ "Google Test"
-# define GTEST_PROJECT_URL_ "https://github.com/google/googletest/"
-#endif  // !defined(GTEST_DEV_EMAIL_)
-
-#if !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
-# define GTEST_INIT_GOOGLE_TEST_NAME_ "testing::InitGoogleTest"
-#endif  // !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
-
-// Determines the version of gcc that is used to compile this.
-#ifdef __GNUC__
-// 40302 means version 4.3.2.
-# define GTEST_GCC_VER_ \
-    (__GNUC__*10000 + __GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__)
-#endif  // __GNUC__
-
-// Macros for disabling Microsoft Visual C++ warnings.
-//
-//   GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 4385)
-//   /* code that triggers warnings C4800 and C4385 */
-//   GTEST_DISABLE_MSC_WARNINGS_POP_()
-#if defined(_MSC_VER)
-# define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings) \
-    __pragma(warning(push))                        \
-    __pragma(warning(disable: warnings))
-# define GTEST_DISABLE_MSC_WARNINGS_POP_()          \
-    __pragma(warning(pop))
-#else
-// Not all compilers are MSVC
-# define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings)
-# define GTEST_DISABLE_MSC_WARNINGS_POP_()
-#endif
-
-// Clang on Windows does not understand MSVC's pragma warning.
-// We need clang-specific way to disable function deprecation warning.
-#ifdef __clang__
-# define GTEST_DISABLE_MSC_DEPRECATED_PUSH_()                         \
-    _Pragma("clang diagnostic push")                                  \
-    _Pragma("clang diagnostic ignored \"-Wdeprecated-declarations\"") \
-    _Pragma("clang diagnostic ignored \"-Wdeprecated-implementations\"")
-#define GTEST_DISABLE_MSC_DEPRECATED_POP_() \
-    _Pragma("clang diagnostic pop")
-#else
-# define GTEST_DISABLE_MSC_DEPRECATED_PUSH_() \
-    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4996)
-# define GTEST_DISABLE_MSC_DEPRECATED_POP_() \
-    GTEST_DISABLE_MSC_WARNINGS_POP_()
-#endif
-
-// Brings in definitions for functions used in the testing::internal::posix
-// namespace (read, write, close, chdir, isatty, stat). We do not currently
-// use them on Windows Mobile.
-#if GTEST_OS_WINDOWS
-# if !GTEST_OS_WINDOWS_MOBILE
-#  include <direct.h>
-#  include <io.h>
-# endif
-// In order to avoid having to include <windows.h>, use forward declaration
-#if GTEST_OS_WINDOWS_MINGW && !defined(__MINGW64_VERSION_MAJOR)
-// MinGW defined _CRITICAL_SECTION and _RTL_CRITICAL_SECTION as two
-// separate (equivalent) structs, instead of using typedef
-typedef struct _CRITICAL_SECTION GTEST_CRITICAL_SECTION;
-#else
-// Assume CRITICAL_SECTION is a typedef of _RTL_CRITICAL_SECTION.
-// This assumption is verified by
-// WindowsTypesTest.CRITICAL_SECTIONIs_RTL_CRITICAL_SECTION.
-typedef struct _RTL_CRITICAL_SECTION GTEST_CRITICAL_SECTION;
-#endif
-#elif GTEST_OS_XTENSA
-#include <unistd.h>
-// Xtensa toolchains define strcasecmp in the string.h header instead of
-// strings.h. string.h is already included.
-#else
-// This assumes that non-Windows OSes provide unistd.h. For OSes where this
-// is not the case, we need to include headers that provide the functions
-// mentioned above.
-# include <unistd.h>
-# include <strings.h>
-#endif  // GTEST_OS_WINDOWS
-
-#if GTEST_OS_LINUX_ANDROID
-// Used to define __ANDROID_API__ matching the target NDK API level.
-#  include <android/api-level.h>  // NOLINT
-#endif
-
-// Defines this to true if and only if Google Test can use POSIX regular
-// expressions.
-#ifndef GTEST_HAS_POSIX_RE
-# if GTEST_OS_LINUX_ANDROID
-// On Android, <regex.h> is only available starting with Gingerbread.
-#  define GTEST_HAS_POSIX_RE (__ANDROID_API__ >= 9)
-# else
-#define GTEST_HAS_POSIX_RE (!GTEST_OS_WINDOWS && !GTEST_OS_XTENSA)
-# endif
-#endif
-
-#if GTEST_USES_PCRE
-// The appropriate headers have already been included.
-
-#elif GTEST_HAS_POSIX_RE
-
-// On some platforms, <regex.h> needs someone to define size_t, and
-// won't compile otherwise.  We can #include it here as we already
-// included <stdlib.h>, which is guaranteed to define size_t through
-// <stddef.h>.
-# include <regex.h>  // NOLINT
-
-# define GTEST_USES_POSIX_RE 1
-
-#elif GTEST_OS_WINDOWS
-
-// <regex.h> is not available on Windows.  Use our own simple regex
-// implementation instead.
-# define GTEST_USES_SIMPLE_RE 1
-
-#else
-
-// <regex.h> may not be available on this platform.  Use our own
-// simple regex implementation instead.
-# define GTEST_USES_SIMPLE_RE 1
-
-#endif  // GTEST_USES_PCRE
-
-#ifndef GTEST_HAS_EXCEPTIONS
-// The user didn't tell us whether exceptions are enabled, so we need
-// to figure it out.
-# if defined(_MSC_VER) && defined(_CPPUNWIND)
-// MSVC defines _CPPUNWIND to 1 if and only if exceptions are enabled.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__BORLANDC__)
-// C++Builder's implementation of the STL uses the _HAS_EXCEPTIONS
-// macro to enable exceptions, so we'll do the same.
-// Assumes that exceptions are enabled by default.
-#  ifndef _HAS_EXCEPTIONS
-#   define _HAS_EXCEPTIONS 1
-#  endif  // _HAS_EXCEPTIONS
-#  define GTEST_HAS_EXCEPTIONS _HAS_EXCEPTIONS
-# elif defined(__clang__)
-// clang defines __EXCEPTIONS if and only if exceptions are enabled before clang
-// 220714, but if and only if cleanups are enabled after that. In Obj-C++ files,
-// there can be cleanups for ObjC exceptions which also need cleanups, even if
-// C++ exceptions are disabled. clang has __has_feature(cxx_exceptions) which
-// checks for C++ exceptions starting at clang r206352, but which checked for
-// cleanups prior to that. To reliably check for C++ exception availability with
-// clang, check for
-// __EXCEPTIONS && __has_feature(cxx_exceptions).
-#  define GTEST_HAS_EXCEPTIONS (__EXCEPTIONS && __has_feature(cxx_exceptions))
-# elif defined(__GNUC__) && __EXCEPTIONS
-// gcc defines __EXCEPTIONS to 1 if and only if exceptions are enabled.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__SUNPRO_CC)
-// Sun Pro CC supports exceptions.  However, there is no compile-time way of
-// detecting whether they are enabled or not.  Therefore, we assume that
-// they are enabled unless the user tells us otherwise.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__IBMCPP__) && __EXCEPTIONS
-// xlC defines __EXCEPTIONS to 1 if and only if exceptions are enabled.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__HP_aCC)
-// Exception handling is in effect by default in HP aCC compiler. It has to
-// be turned of by +noeh compiler option if desired.
-#  define GTEST_HAS_EXCEPTIONS 1
-# else
-// For other compilers, we assume exceptions are disabled to be
-// conservative.
-#  define GTEST_HAS_EXCEPTIONS 0
-# endif  // defined(_MSC_VER) || defined(__BORLANDC__)
-#endif  // GTEST_HAS_EXCEPTIONS
-
-#ifndef GTEST_HAS_STD_WSTRING
-// The user didn't tell us whether ::std::wstring is available, so we need
-// to figure it out.
-// Cygwin 1.7 and below doesn't support ::std::wstring.
-// Solaris' libc++ doesn't support it either.  Android has
-// no support for it at least as recent as Froyo (2.2).
-#define GTEST_HAS_STD_WSTRING                                         \
-  (!(GTEST_OS_LINUX_ANDROID || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS || \
-     GTEST_OS_HAIKU || GTEST_OS_ESP32 || GTEST_OS_ESP8266 || GTEST_OS_XTENSA))
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Determines whether RTTI is available.
-#ifndef GTEST_HAS_RTTI
-// The user didn't tell us whether RTTI is enabled, so we need to
-// figure it out.
-
-# ifdef _MSC_VER
-
-#ifdef _CPPRTTI  // MSVC defines this macro if and only if RTTI is enabled.
-#   define GTEST_HAS_RTTI 1
-#  else
-#   define GTEST_HAS_RTTI 0
-#  endif
-
-// Starting with version 4.3.2, gcc defines __GXX_RTTI if and only if RTTI is
-// enabled.
-# elif defined(__GNUC__)
-
-#  ifdef __GXX_RTTI
-// When building against STLport with the Android NDK and with
-// -frtti -fno-exceptions, the build fails at link time with undefined
-// references to __cxa_bad_typeid. Note sure if STL or toolchain bug,
-// so disable RTTI when detected.
-#   if GTEST_OS_LINUX_ANDROID && defined(_STLPORT_MAJOR) && \
-       !defined(__EXCEPTIONS)
-#    define GTEST_HAS_RTTI 0
-#   else
-#    define GTEST_HAS_RTTI 1
-#   endif  // GTEST_OS_LINUX_ANDROID && __STLPORT_MAJOR && !__EXCEPTIONS
-#  else
-#   define GTEST_HAS_RTTI 0
-#  endif  // __GXX_RTTI
-
-// Clang defines __GXX_RTTI starting with version 3.0, but its manual recommends
-// using has_feature instead. has_feature(cxx_rtti) is supported since 2.7, the
-// first version with C++ support.
-# elif defined(__clang__)
-
-#  define GTEST_HAS_RTTI __has_feature(cxx_rtti)
-
-// Starting with version 9.0 IBM Visual Age defines __RTTI_ALL__ to 1 if
-// both the typeid and dynamic_cast features are present.
-# elif defined(__IBMCPP__) && (__IBMCPP__ >= 900)
-
-#  ifdef __RTTI_ALL__
-#   define GTEST_HAS_RTTI 1
-#  else
-#   define GTEST_HAS_RTTI 0
-#  endif
-
-# else
-
-// For all other compilers, we assume RTTI is enabled.
-#  define GTEST_HAS_RTTI 1
-
-# endif  // _MSC_VER
-
-#endif  // GTEST_HAS_RTTI
-
-// It's this header's responsibility to #include <typeinfo> when RTTI
-// is enabled.
-#if GTEST_HAS_RTTI
-# include <typeinfo>
-#endif
-
-// Determines whether Google Test can use the pthreads library.
-#ifndef GTEST_HAS_PTHREAD
-// The user didn't tell us explicitly, so we make reasonable assumptions about
-// which platforms have pthreads support.
-//
-// To disable threading support in Google Test, add -DGTEST_HAS_PTHREAD=0
-// to your compiler flags.
-#define GTEST_HAS_PTHREAD                                                      \
-  (GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_HPUX || GTEST_OS_QNX ||          \
-   GTEST_OS_FREEBSD || GTEST_OS_NACL || GTEST_OS_NETBSD || GTEST_OS_FUCHSIA || \
-   GTEST_OS_DRAGONFLY || GTEST_OS_GNU_KFREEBSD || GTEST_OS_OPENBSD ||          \
-   GTEST_OS_HAIKU)
-#endif  // GTEST_HAS_PTHREAD
-
-#if GTEST_HAS_PTHREAD
-// gtest-port.h guarantees to #include <pthread.h> when GTEST_HAS_PTHREAD is
-// true.
-# include <pthread.h>  // NOLINT
-
-// For timespec and nanosleep, used below.
-# include <time.h>  // NOLINT
-#endif
-
-// Determines whether clone(2) is supported.
-// Usually it will only be available on Linux, excluding
-// Linux on the Itanium architecture.
-// Also see http://linux.die.net/man/2/clone.
-#ifndef GTEST_HAS_CLONE
-// The user didn't tell us, so we need to figure it out.
-
-# if GTEST_OS_LINUX && !defined(__ia64__)
-#  if GTEST_OS_LINUX_ANDROID
-// On Android, clone() became available at different API levels for each 32-bit
-// architecture.
-#    if defined(__LP64__) || \
-        (defined(__arm__) && __ANDROID_API__ >= 9) || \
-        (defined(__mips__) && __ANDROID_API__ >= 12) || \
-        (defined(__i386__) && __ANDROID_API__ >= 17)
-#     define GTEST_HAS_CLONE 1
-#    else
-#     define GTEST_HAS_CLONE 0
-#    endif
-#  else
-#   define GTEST_HAS_CLONE 1
-#  endif
-# else
-#  define GTEST_HAS_CLONE 0
-# endif  // GTEST_OS_LINUX && !defined(__ia64__)
-
-#endif  // GTEST_HAS_CLONE
-
-// Determines whether to support stream redirection. This is used to test
-// output correctness and to implement death tests.
-#ifndef GTEST_HAS_STREAM_REDIRECTION
-// By default, we assume that stream redirection is supported on all
-// platforms except known mobile ones.
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE || \
-    GTEST_OS_WINDOWS_RT || GTEST_OS_ESP8266 || GTEST_OS_XTENSA
-#  define GTEST_HAS_STREAM_REDIRECTION 0
-# else
-#  define GTEST_HAS_STREAM_REDIRECTION 1
-# endif  // !GTEST_OS_WINDOWS_MOBILE
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-// Determines whether to support death tests.
-// pops up a dialog window that cannot be suppressed programmatically.
-#if (GTEST_OS_LINUX || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS ||             \
-     (GTEST_OS_MAC && !GTEST_OS_IOS) ||                                   \
-     (GTEST_OS_WINDOWS_DESKTOP && _MSC_VER) || GTEST_OS_WINDOWS_MINGW ||  \
-     GTEST_OS_AIX || GTEST_OS_HPUX || GTEST_OS_OPENBSD || GTEST_OS_QNX || \
-     GTEST_OS_FREEBSD || GTEST_OS_NETBSD || GTEST_OS_FUCHSIA ||           \
-     GTEST_OS_DRAGONFLY || GTEST_OS_GNU_KFREEBSD || GTEST_OS_HAIKU)
-# define GTEST_HAS_DEATH_TEST 1
-#endif
-
-// Determines whether to support type-driven tests.
-
-// Typed tests need <typeinfo> and variadic macros, which GCC, VC++ 8.0,
-// Sun Pro CC, IBM Visual Age, and HP aCC support.
-#if defined(__GNUC__) || defined(_MSC_VER) || defined(__SUNPRO_CC) || \
-    defined(__IBMCPP__) || defined(__HP_aCC)
-# define GTEST_HAS_TYPED_TEST 1
-# define GTEST_HAS_TYPED_TEST_P 1
-#endif
-
-// Determines whether the system compiler uses UTF-16 for encoding wide strings.
-#define GTEST_WIDE_STRING_USES_UTF16_ \
-  (GTEST_OS_WINDOWS || GTEST_OS_CYGWIN || GTEST_OS_AIX || GTEST_OS_OS2)
-
-// Determines whether test results can be streamed to a socket.
-#if GTEST_OS_LINUX || GTEST_OS_GNU_KFREEBSD || GTEST_OS_DRAGONFLY || \
-    GTEST_OS_FREEBSD || GTEST_OS_NETBSD || GTEST_OS_OPENBSD
-# define GTEST_CAN_STREAM_RESULTS_ 1
-#endif
-
-// Defines some utility macros.
-
-// The GNU compiler emits a warning if nested "if" statements are followed by
-// an "else" statement and braces are not used to explicitly disambiguate the
-// "else" binding.  This leads to problems with code like:
-//
-//   if (gate)
-//     ASSERT_*(condition) << "Some message";
-//
-// The "switch (0) case 0:" idiom is used to suppress this.
-#ifdef __INTEL_COMPILER
-# define GTEST_AMBIGUOUS_ELSE_BLOCKER_
-#else
-# define GTEST_AMBIGUOUS_ELSE_BLOCKER_ switch (0) case 0: default:  // NOLINT
-#endif
-
-// Use this annotation at the end of a struct/class definition to
-// prevent the compiler from optimizing away instances that are never
-// used.  This is useful when all interesting logic happens inside the
-// c'tor and / or d'tor.  Example:
-//
-//   struct Foo {
-//     Foo() { ... }
-//   } GTEST_ATTRIBUTE_UNUSED_;
-//
-// Also use it after a variable or parameter declaration to tell the
-// compiler the variable/parameter does not have to be used.
-#if defined(__GNUC__) && !defined(COMPILER_ICC)
-# define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
-#elif defined(__clang__)
-# if __has_attribute(unused)
-#  define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
-# endif
-#endif
-#ifndef GTEST_ATTRIBUTE_UNUSED_
-# define GTEST_ATTRIBUTE_UNUSED_
-#endif
-
-// Use this annotation before a function that takes a printf format string.
-#if (defined(__GNUC__) || defined(__clang__)) && !defined(COMPILER_ICC)
-# if defined(__MINGW_PRINTF_FORMAT)
-// MinGW has two different printf implementations. Ensure the format macro
-// matches the selected implementation. See
-// https://sourceforge.net/p/mingw-w64/wiki2/gnu%20printf/.
-#  define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check) \
-       __attribute__((__format__(__MINGW_PRINTF_FORMAT, string_index, \
-                                 first_to_check)))
-# else
-#  define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check) \
-       __attribute__((__format__(__printf__, string_index, first_to_check)))
-# endif
-#else
-# define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check)
-#endif
-
-
-// A macro to disallow copy operator=
-// This should be used in the private: declarations for a class.
-#define GTEST_DISALLOW_ASSIGN_(type) \
-  type& operator=(type const &) = delete
-
-// A macro to disallow copy constructor and operator=
-// This should be used in the private: declarations for a class.
-#define GTEST_DISALLOW_COPY_AND_ASSIGN_(type) \
-  type(type const&) = delete;                 \
-  type& operator=(type const&) = delete
-
-// A macro to disallow move operator=
-// This should be used in the private: declarations for a class.
-#define GTEST_DISALLOW_MOVE_ASSIGN_(type) \
-  type& operator=(type &&) noexcept = delete
-
-// A macro to disallow move constructor and operator=
-// This should be used in the private: declarations for a class.
-#define GTEST_DISALLOW_MOVE_AND_ASSIGN_(type) \
-  type(type&&) noexcept = delete;             \
-  type& operator=(type&&) noexcept = delete
-
-// Tell the compiler to warn about unused return values for functions declared
-// with this macro.  The macro should be used on function declarations
-// following the argument list:
-//
-//   Sprocket* AllocateSprocket() GTEST_MUST_USE_RESULT_;
-#if defined(__GNUC__) && !defined(COMPILER_ICC)
-# define GTEST_MUST_USE_RESULT_ __attribute__ ((warn_unused_result))
-#else
-# define GTEST_MUST_USE_RESULT_
-#endif  // __GNUC__ && !COMPILER_ICC
-
-// MS C++ compiler emits warning when a conditional expression is compile time
-// constant. In some contexts this warning is false positive and needs to be
-// suppressed. Use the following two macros in such cases:
-//
-// GTEST_INTENTIONAL_CONST_COND_PUSH_()
-// while (true) {
-// GTEST_INTENTIONAL_CONST_COND_POP_()
-// }
-# define GTEST_INTENTIONAL_CONST_COND_PUSH_() \
-    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4127)
-# define GTEST_INTENTIONAL_CONST_COND_POP_() \
-    GTEST_DISABLE_MSC_WARNINGS_POP_()
-
-// Determine whether the compiler supports Microsoft's Structured Exception
-// Handling.  This is supported by several Windows compilers but generally
-// does not exist on any other system.
-#ifndef GTEST_HAS_SEH
-// The user didn't tell us, so we need to figure it out.
-
-# if defined(_MSC_VER) || defined(__BORLANDC__)
-// These two compilers are known to support SEH.
-#  define GTEST_HAS_SEH 1
-# else
-// Assume no SEH.
-#  define GTEST_HAS_SEH 0
-# endif
-
-#endif  // GTEST_HAS_SEH
-
-#ifndef GTEST_IS_THREADSAFE
-
-#define GTEST_IS_THREADSAFE                                                 \
-  (GTEST_HAS_MUTEX_AND_THREAD_LOCAL_ ||                                     \
-   (GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT) || \
-   GTEST_HAS_PTHREAD)
-
-#endif  // GTEST_IS_THREADSAFE
-
-// GTEST_API_ qualifies all symbols that must be exported. The definitions below
-// are guarded by #ifndef to give embedders a chance to define GTEST_API_ in
-// gtest/internal/custom/gtest-port.h
-#ifndef GTEST_API_
-
-#ifdef _MSC_VER
-# if GTEST_LINKED_AS_SHARED_LIBRARY
-#  define GTEST_API_ __declspec(dllimport)
-# elif GTEST_CREATE_SHARED_LIBRARY
-#  define GTEST_API_ __declspec(dllexport)
-# endif
-#elif __GNUC__ >= 4 || defined(__clang__)
-# define GTEST_API_ __attribute__((visibility ("default")))
-#endif  // _MSC_VER
-
-#endif  // GTEST_API_
-
-#ifndef GTEST_API_
-# define GTEST_API_
-#endif  // GTEST_API_
-
-#ifndef GTEST_DEFAULT_DEATH_TEST_STYLE
-# define GTEST_DEFAULT_DEATH_TEST_STYLE  "fast"
-#endif  // GTEST_DEFAULT_DEATH_TEST_STYLE
-
-#ifdef __GNUC__
-// Ask the compiler to never inline a given function.
-# define GTEST_NO_INLINE_ __attribute__((noinline))
-#else
-# define GTEST_NO_INLINE_
-#endif
-
-// _LIBCPP_VERSION is defined by the libc++ library from the LLVM project.
-#if !defined(GTEST_HAS_CXXABI_H_)
-# if defined(__GLIBCXX__) || (defined(_LIBCPP_VERSION) && !defined(_MSC_VER))
-#  define GTEST_HAS_CXXABI_H_ 1
-# else
-#  define GTEST_HAS_CXXABI_H_ 0
-# endif
-#endif
-
-// A function level attribute to disable checking for use of uninitialized
-// memory when built with MemorySanitizer.
-#if defined(__clang__)
-# if __has_feature(memory_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_ \
-       __attribute__((no_sanitize_memory))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-# endif  // __has_feature(memory_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-#endif  // __clang__
-
-// A function level attribute to disable AddressSanitizer instrumentation.
-#if defined(__clang__)
-# if __has_feature(address_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_ \
-       __attribute__((no_sanitize_address))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-# endif  // __has_feature(address_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-#endif  // __clang__
-
-// A function level attribute to disable HWAddressSanitizer instrumentation.
-#if defined(__clang__)
-# if __has_feature(hwaddress_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_ \
-       __attribute__((no_sanitize("hwaddress")))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-# endif  // __has_feature(hwaddress_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-#endif  // __clang__
-
-// A function level attribute to disable ThreadSanitizer instrumentation.
-#if defined(__clang__)
-# if __has_feature(thread_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_ \
-       __attribute__((no_sanitize_thread))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-# endif  // __has_feature(thread_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-#endif  // __clang__
-
-namespace testing {
-
-class Message;
-
-// Legacy imports for backwards compatibility.
-// New code should use std:: names directly.
-using std::get;
-using std::make_tuple;
-using std::tuple;
-using std::tuple_element;
-using std::tuple_size;
-
-namespace internal {
-
-// A secret type that Google Test users don't know about.  It has no
-// definition on purpose.  Therefore it's impossible to create a
-// Secret object, which is what we want.
-class Secret;
-
-// The GTEST_COMPILE_ASSERT_ is a legacy macro used to verify that a compile
-// time expression is true (in new code, use static_assert instead). For
-// example, you could use it to verify the size of a static array:
-//
-//   GTEST_COMPILE_ASSERT_(GTEST_ARRAY_SIZE_(names) == NUM_NAMES,
-//                         names_incorrect_size);
-//
-// The second argument to the macro must be a valid C++ identifier. If the
-// expression is false, compiler will issue an error containing this identifier.
-#define GTEST_COMPILE_ASSERT_(expr, msg) static_assert(expr, #msg)
-
-// A helper for suppressing warnings on constant condition.  It just
-// returns 'condition'.
-GTEST_API_ bool IsTrue(bool condition);
-
-// Defines RE.
-
-#if GTEST_USES_PCRE
-// if used, PCRE is injected by custom/gtest-port.h
-#elif GTEST_USES_POSIX_RE || GTEST_USES_SIMPLE_RE
-
-// A simple C++ wrapper for <regex.h>.  It uses the POSIX Extended
-// Regular Expression syntax.
-class GTEST_API_ RE {
- public:
-  // A copy constructor is required by the Standard to initialize object
-  // references from r-values.
-  RE(const RE& other) { Init(other.pattern()); }
-
-  // Constructs an RE from a string.
-  RE(const ::std::string& regex) { Init(regex.c_str()); }  // NOLINT
-
-  RE(const char* regex) { Init(regex); }  // NOLINT
-  ~RE();
-
-  // Returns the string representation of the regex.
-  const char* pattern() const { return pattern_; }
-
-  // FullMatch(str, re) returns true if and only if regular expression re
-  // matches the entire str.
-  // PartialMatch(str, re) returns true if and only if regular expression re
-  // matches a substring of str (including str itself).
-  static bool FullMatch(const ::std::string& str, const RE& re) {
-    return FullMatch(str.c_str(), re);
-  }
-  static bool PartialMatch(const ::std::string& str, const RE& re) {
-    return PartialMatch(str.c_str(), re);
-  }
-
-  static bool FullMatch(const char* str, const RE& re);
-  static bool PartialMatch(const char* str, const RE& re);
-
- private:
-  void Init(const char* regex);
-  const char* pattern_;
-  bool is_valid_;
-
-# if GTEST_USES_POSIX_RE
-
-  regex_t full_regex_;     // For FullMatch().
-  regex_t partial_regex_;  // For PartialMatch().
-
-# else  // GTEST_USES_SIMPLE_RE
-
-  const char* full_pattern_;  // For FullMatch();
-
-# endif
-};
-
-#endif  // GTEST_USES_PCRE
-
-// Formats a source file path and a line number as they would appear
-// in an error message from the compiler used to compile this code.
-GTEST_API_ ::std::string FormatFileLocation(const char* file, int line);
-
-// Formats a file location for compiler-independent XML output.
-// Although this function is not platform dependent, we put it next to
-// FormatFileLocation in order to contrast the two functions.
-GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(const char* file,
-                                                               int line);
-
-// Defines logging utilities:
-//   GTEST_LOG_(severity) - logs messages at the specified severity level. The
-//                          message itself is streamed into the macro.
-//   LogToStderr()  - directs all log messages to stderr.
-//   FlushInfoLog() - flushes informational log messages.
-
-enum GTestLogSeverity {
-  GTEST_INFO,
-  GTEST_WARNING,
-  GTEST_ERROR,
-  GTEST_FATAL
-};
-
-// Formats log entry severity, provides a stream object for streaming the
-// log message, and terminates the message with a newline when going out of
-// scope.
-class GTEST_API_ GTestLog {
- public:
-  GTestLog(GTestLogSeverity severity, const char* file, int line);
-
-  // Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
-  ~GTestLog();
-
-  ::std::ostream& GetStream() { return ::std::cerr; }
-
- private:
-  const GTestLogSeverity severity_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestLog);
-};
-
-#if !defined(GTEST_LOG_)
-
-# define GTEST_LOG_(severity) \
-    ::testing::internal::GTestLog(::testing::internal::GTEST_##severity, \
-                                  __FILE__, __LINE__).GetStream()
-
-inline void LogToStderr() {}
-inline void FlushInfoLog() { fflush(nullptr); }
-
-#endif  // !defined(GTEST_LOG_)
-
-#if !defined(GTEST_CHECK_)
-// INTERNAL IMPLEMENTATION - DO NOT USE.
-//
-// GTEST_CHECK_ is an all-mode assert. It aborts the program if the condition
-// is not satisfied.
-//  Synopsys:
-//    GTEST_CHECK_(boolean_condition);
-//     or
-//    GTEST_CHECK_(boolean_condition) << "Additional message";
-//
-//    This checks the condition and if the condition is not satisfied
-//    it prints message about the condition violation, including the
-//    condition itself, plus additional message streamed into it, if any,
-//    and then it aborts the program. It aborts the program irrespective of
-//    whether it is built in the debug mode or not.
-# define GTEST_CHECK_(condition) \
-    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-    if (::testing::internal::IsTrue(condition)) \
-      ; \
-    else \
-      GTEST_LOG_(FATAL) << "Condition " #condition " failed. "
-#endif  // !defined(GTEST_CHECK_)
-
-// An all-mode assert to verify that the given POSIX-style function
-// call returns 0 (indicating success).  Known limitation: this
-// doesn't expand to a balanced 'if' statement, so enclose the macro
-// in {} if you need to use it as the only statement in an 'if'
-// branch.
-#define GTEST_CHECK_POSIX_SUCCESS_(posix_call) \
-  if (const int gtest_error = (posix_call)) \
-    GTEST_LOG_(FATAL) << #posix_call << "failed with error " \
-                      << gtest_error
-
-// Transforms "T" into "const T&" according to standard reference collapsing
-// rules (this is only needed as a backport for C++98 compilers that do not
-// support reference collapsing). Specifically, it transforms:
-//
-//   char         ==> const char&
-//   const char   ==> const char&
-//   char&        ==> char&
-//   const char&  ==> const char&
-//
-// Note that the non-const reference will not have "const" added. This is
-// standard, and necessary so that "T" can always bind to "const T&".
-template <typename T>
-struct ConstRef { typedef const T& type; };
-template <typename T>
-struct ConstRef<T&> { typedef T& type; };
-
-// The argument T must depend on some template parameters.
-#define GTEST_REFERENCE_TO_CONST_(T) \
-  typename ::testing::internal::ConstRef<T>::type
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Use ImplicitCast_ as a safe version of static_cast for upcasting in
-// the type hierarchy (e.g. casting a Foo* to a SuperclassOfFoo* or a
-// const Foo*).  When you use ImplicitCast_, the compiler checks that
-// the cast is safe.  Such explicit ImplicitCast_s are necessary in
-// surprisingly many situations where C++ demands an exact type match
-// instead of an argument type convertable to a target type.
-//
-// The syntax for using ImplicitCast_ is the same as for static_cast:
-//
-//   ImplicitCast_<ToType>(expr)
-//
-// ImplicitCast_ would have been part of the C++ standard library,
-// but the proposal was submitted too late.  It will probably make
-// its way into the language in the future.
-//
-// This relatively ugly name is intentional. It prevents clashes with
-// similar functions users may have (e.g., implicit_cast). The internal
-// namespace alone is not enough because the function can be found by ADL.
-template<typename To>
-inline To ImplicitCast_(To x) { return x; }
-
-// When you upcast (that is, cast a pointer from type Foo to type
-// SuperclassOfFoo), it's fine to use ImplicitCast_<>, since upcasts
-// always succeed.  When you downcast (that is, cast a pointer from
-// type Foo to type SubclassOfFoo), static_cast<> isn't safe, because
-// how do you know the pointer is really of type SubclassOfFoo?  It
-// could be a bare Foo, or of type DifferentSubclassOfFoo.  Thus,
-// when you downcast, you should use this macro.  In debug mode, we
-// use dynamic_cast<> to double-check the downcast is legal (we die
-// if it's not).  In normal mode, we do the efficient static_cast<>
-// instead.  Thus, it's important to test in debug mode to make sure
-// the cast is legal!
-//    This is the only place in the code we should use dynamic_cast<>.
-// In particular, you SHOULDN'T be using dynamic_cast<> in order to
-// do RTTI (eg code like this:
-//    if (dynamic_cast<Subclass1>(foo)) HandleASubclass1Object(foo);
-//    if (dynamic_cast<Subclass2>(foo)) HandleASubclass2Object(foo);
-// You should design the code some other way not to need this.
-//
-// This relatively ugly name is intentional. It prevents clashes with
-// similar functions users may have (e.g., down_cast). The internal
-// namespace alone is not enough because the function can be found by ADL.
-template<typename To, typename From>  // use like this: DownCast_<T*>(foo);
-inline To DownCast_(From* f) {  // so we only accept pointers
-  // Ensures that To is a sub-type of From *.  This test is here only
-  // for compile-time type checking, and has no overhead in an
-  // optimized build at run-time, as it will be optimized away
-  // completely.
-  GTEST_INTENTIONAL_CONST_COND_PUSH_()
-  if (false) {
-  GTEST_INTENTIONAL_CONST_COND_POP_()
-  const To to = nullptr;
-  ::testing::internal::ImplicitCast_<From*>(to);
-  }
-
-#if GTEST_HAS_RTTI
-  // RTTI: debug mode only!
-  GTEST_CHECK_(f == nullptr || dynamic_cast<To>(f) != nullptr);
-#endif
-  return static_cast<To>(f);
-}
-
-// Downcasts the pointer of type Base to Derived.
-// Derived must be a subclass of Base. The parameter MUST
-// point to a class of type Derived, not any subclass of it.
-// When RTTI is available, the function performs a runtime
-// check to enforce this.
-template <class Derived, class Base>
-Derived* CheckedDowncastToActualType(Base* base) {
-#if GTEST_HAS_RTTI
-  GTEST_CHECK_(typeid(*base) == typeid(Derived));
-#endif
-
-#if GTEST_HAS_DOWNCAST_
-  return ::down_cast<Derived*>(base);
-#elif GTEST_HAS_RTTI
-  return dynamic_cast<Derived*>(base);  // NOLINT
-#else
-  return static_cast<Derived*>(base);  // Poor man's downcast.
-#endif
-}
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Defines the stderr capturer:
-//   CaptureStdout     - starts capturing stdout.
-//   GetCapturedStdout - stops capturing stdout and returns the captured string.
-//   CaptureStderr     - starts capturing stderr.
-//   GetCapturedStderr - stops capturing stderr and returns the captured string.
-//
-GTEST_API_ void CaptureStdout();
-GTEST_API_ std::string GetCapturedStdout();
-GTEST_API_ void CaptureStderr();
-GTEST_API_ std::string GetCapturedStderr();
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-// Returns the size (in bytes) of a file.
-GTEST_API_ size_t GetFileSize(FILE* file);
-
-// Reads the entire content of a file as a string.
-GTEST_API_ std::string ReadEntireFile(FILE* file);
-
-// All command line arguments.
-GTEST_API_ std::vector<std::string> GetArgvs();
-
-#if GTEST_HAS_DEATH_TEST
-
-std::vector<std::string> GetInjectableArgvs();
-// Deprecated: pass the args vector by value instead.
-void SetInjectableArgvs(const std::vector<std::string>* new_argvs);
-void SetInjectableArgvs(const std::vector<std::string>& new_argvs);
-void ClearInjectableArgvs();
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Defines synchronization primitives.
-#if GTEST_IS_THREADSAFE
-# if GTEST_HAS_PTHREAD
-// Sleeps for (roughly) n milliseconds.  This function is only for testing
-// Google Test's own constructs.  Don't use it in user tests, either
-// directly or indirectly.
-inline void SleepMilliseconds(int n) {
-  const timespec time = {
-    0,                  // 0 seconds.
-    n * 1000L * 1000L,  // And n ms.
-  };
-  nanosleep(&time, nullptr);
-}
-# endif  // GTEST_HAS_PTHREAD
-
-# if GTEST_HAS_NOTIFICATION_
-// Notification has already been imported into the namespace.
-// Nothing to do here.
-
-# elif GTEST_HAS_PTHREAD
-// Allows a controller thread to pause execution of newly created
-// threads until notified.  Instances of this class must be created
-// and destroyed in the controller thread.
-//
-// This class is only for testing Google Test's own constructs. Do not
-// use it in user tests, either directly or indirectly.
-class Notification {
- public:
-  Notification() : notified_(false) {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_init(&mutex_, nullptr));
-  }
-  ~Notification() {
-    pthread_mutex_destroy(&mutex_);
-  }
-
-  // Notifies all threads created with this notification to start. Must
-  // be called from the controller thread.
-  void Notify() {
-    pthread_mutex_lock(&mutex_);
-    notified_ = true;
-    pthread_mutex_unlock(&mutex_);
-  }
-
-  // Blocks until the controller thread notifies. Must be called from a test
-  // thread.
-  void WaitForNotification() {
-    for (;;) {
-      pthread_mutex_lock(&mutex_);
-      const bool notified = notified_;
-      pthread_mutex_unlock(&mutex_);
-      if (notified)
-        break;
-      SleepMilliseconds(10);
-    }
-  }
-
- private:
-  pthread_mutex_t mutex_;
-  bool notified_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
-};
-
-# elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-
-GTEST_API_ void SleepMilliseconds(int n);
-
-// Provides leak-safe Windows kernel handle ownership.
-// Used in death tests and in threading support.
-class GTEST_API_ AutoHandle {
- public:
-  // Assume that Win32 HANDLE type is equivalent to void*. Doing so allows us to
-  // avoid including <windows.h> in this header file. Including <windows.h> is
-  // undesirable because it defines a lot of symbols and macros that tend to
-  // conflict with client code. This assumption is verified by
-  // WindowsTypesTest.HANDLEIsVoidStar.
-  typedef void* Handle;
-  AutoHandle();
-  explicit AutoHandle(Handle handle);
-
-  ~AutoHandle();
-
-  Handle Get() const;
-  void Reset();
-  void Reset(Handle handle);
-
- private:
-  // Returns true if and only if the handle is a valid handle object that can be
-  // closed.
-  bool IsCloseable() const;
-
-  Handle handle_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(AutoHandle);
-};
-
-// Allows a controller thread to pause execution of newly created
-// threads until notified.  Instances of this class must be created
-// and destroyed in the controller thread.
-//
-// This class is only for testing Google Test's own constructs. Do not
-// use it in user tests, either directly or indirectly.
-class GTEST_API_ Notification {
- public:
-  Notification();
-  void Notify();
-  void WaitForNotification();
-
- private:
-  AutoHandle event_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
-};
-# endif  // GTEST_HAS_NOTIFICATION_
-
-// On MinGW, we can have both GTEST_OS_WINDOWS and GTEST_HAS_PTHREAD
-// defined, but we don't want to use MinGW's pthreads implementation, which
-// has conformance problems with some versions of the POSIX standard.
-# if GTEST_HAS_PTHREAD && !GTEST_OS_WINDOWS_MINGW
-
-// As a C-function, ThreadFuncWithCLinkage cannot be templated itself.
-// Consequently, it cannot select a correct instantiation of ThreadWithParam
-// in order to call its Run(). Introducing ThreadWithParamBase as a
-// non-templated base class for ThreadWithParam allows us to bypass this
-// problem.
-class ThreadWithParamBase {
- public:
-  virtual ~ThreadWithParamBase() {}
-  virtual void Run() = 0;
-};
-
-// pthread_create() accepts a pointer to a function type with the C linkage.
-// According to the Standard (7.5/1), function types with different linkages
-// are different even if they are otherwise identical.  Some compilers (for
-// example, SunStudio) treat them as different types.  Since class methods
-// cannot be defined with C-linkage we need to define a free C-function to
-// pass into pthread_create().
-extern "C" inline void* ThreadFuncWithCLinkage(void* thread) {
-  static_cast<ThreadWithParamBase*>(thread)->Run();
-  return nullptr;
-}
-
-// Helper class for testing Google Test's multi-threading constructs.
-// To use it, write:
-//
-//   void ThreadFunc(int param) { /* Do things with param */ }
-//   Notification thread_can_start;
-//   ...
-//   // The thread_can_start parameter is optional; you can supply NULL.
-//   ThreadWithParam<int> thread(&ThreadFunc, 5, &thread_can_start);
-//   thread_can_start.Notify();
-//
-// These classes are only for testing Google Test's own constructs. Do
-// not use them in user tests, either directly or indirectly.
-template <typename T>
-class ThreadWithParam : public ThreadWithParamBase {
- public:
-  typedef void UserThreadFunc(T);
-
-  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
-      : func_(func),
-        param_(param),
-        thread_can_start_(thread_can_start),
-        finished_(false) {
-    ThreadWithParamBase* const base = this;
-    // The thread can be created only after all fields except thread_
-    // have been initialized.
-    GTEST_CHECK_POSIX_SUCCESS_(
-        pthread_create(&thread_, nullptr, &ThreadFuncWithCLinkage, base));
-  }
-  ~ThreadWithParam() override { Join(); }
-
-  void Join() {
-    if (!finished_) {
-      GTEST_CHECK_POSIX_SUCCESS_(pthread_join(thread_, nullptr));
-      finished_ = true;
-    }
-  }
-
-  void Run() override {
-    if (thread_can_start_ != nullptr) thread_can_start_->WaitForNotification();
-    func_(param_);
-  }
-
- private:
-  UserThreadFunc* const func_;  // User-supplied thread function.
-  const T param_;  // User-supplied parameter to the thread function.
-  // When non-NULL, used to block execution until the controller thread
-  // notifies.
-  Notification* const thread_can_start_;
-  bool finished_;  // true if and only if we know that the thread function has
-                   // finished.
-  pthread_t thread_;  // The native thread object.
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
-};
-# endif  // !GTEST_OS_WINDOWS && GTEST_HAS_PTHREAD ||
-         // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
-
-# if GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
-// Mutex and ThreadLocal have already been imported into the namespace.
-// Nothing to do here.
-
-# elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-
-// Mutex implements mutex on Windows platforms.  It is used in conjunction
-// with class MutexLock:
-//
-//   Mutex mutex;
-//   ...
-//   MutexLock lock(&mutex);  // Acquires the mutex and releases it at the
-//                            // end of the current scope.
-//
-// A static Mutex *must* be defined or declared using one of the following
-// macros:
-//   GTEST_DEFINE_STATIC_MUTEX_(g_some_mutex);
-//   GTEST_DECLARE_STATIC_MUTEX_(g_some_mutex);
-//
-// (A non-static Mutex is defined/declared in the usual way).
-class GTEST_API_ Mutex {
- public:
-  enum MutexType { kStatic = 0, kDynamic = 1 };
-  // We rely on kStaticMutex being 0 as it is to what the linker initializes
-  // type_ in static mutexes.  critical_section_ will be initialized lazily
-  // in ThreadSafeLazyInit().
-  enum StaticConstructorSelector { kStaticMutex = 0 };
-
-  // This constructor intentionally does nothing.  It relies on type_ being
-  // statically initialized to 0 (effectively setting it to kStatic) and on
-  // ThreadSafeLazyInit() to lazily initialize the rest of the members.
-  explicit Mutex(StaticConstructorSelector /*dummy*/) {}
-
-  Mutex();
-  ~Mutex();
-
-  void Lock();
-
-  void Unlock();
-
-  // Does nothing if the current thread holds the mutex. Otherwise, crashes
-  // with high probability.
-  void AssertHeld();
-
- private:
-  // Initializes owner_thread_id_ and critical_section_ in static mutexes.
-  void ThreadSafeLazyInit();
-
-  // Per https://blogs.msdn.microsoft.com/oldnewthing/20040223-00/?p=40503,
-  // we assume that 0 is an invalid value for thread IDs.
-  unsigned int owner_thread_id_;
-
-  // For static mutexes, we rely on these members being initialized to zeros
-  // by the linker.
-  MutexType type_;
-  long critical_section_init_phase_;  // NOLINT
-  GTEST_CRITICAL_SECTION* critical_section_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
-};
-
-# define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
-    extern ::testing::internal::Mutex mutex
-
-# define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
-    ::testing::internal::Mutex mutex(::testing::internal::Mutex::kStaticMutex)
-
-// We cannot name this class MutexLock because the ctor declaration would
-// conflict with a macro named MutexLock, which is defined on some
-// platforms. That macro is used as a defensive measure to prevent against
-// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
-// "MutexLock l(&mu)".  Hence the typedef trick below.
-class GTestMutexLock {
- public:
-  explicit GTestMutexLock(Mutex* mutex)
-      : mutex_(mutex) { mutex_->Lock(); }
-
-  ~GTestMutexLock() { mutex_->Unlock(); }
-
- private:
-  Mutex* const mutex_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
-};
-
-typedef GTestMutexLock MutexLock;
-
-// Base class for ValueHolder<T>.  Allows a caller to hold and delete a value
-// without knowing its type.
-class ThreadLocalValueHolderBase {
- public:
-  virtual ~ThreadLocalValueHolderBase() {}
-};
-
-// Provides a way for a thread to send notifications to a ThreadLocal
-// regardless of its parameter type.
-class ThreadLocalBase {
- public:
-  // Creates a new ValueHolder<T> object holding a default value passed to
-  // this ThreadLocal<T>'s constructor and returns it.  It is the caller's
-  // responsibility not to call this when the ThreadLocal<T> instance already
-  // has a value on the current thread.
-  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const = 0;
-
- protected:
-  ThreadLocalBase() {}
-  virtual ~ThreadLocalBase() {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocalBase);
-};
-
-// Maps a thread to a set of ThreadLocals that have values instantiated on that
-// thread and notifies them when the thread exits.  A ThreadLocal instance is
-// expected to persist until all threads it has values on have terminated.
-class GTEST_API_ ThreadLocalRegistry {
- public:
-  // Registers thread_local_instance as having value on the current thread.
-  // Returns a value that can be used to identify the thread from other threads.
-  static ThreadLocalValueHolderBase* GetValueOnCurrentThread(
-      const ThreadLocalBase* thread_local_instance);
-
-  // Invoked when a ThreadLocal instance is destroyed.
-  static void OnThreadLocalDestroyed(
-      const ThreadLocalBase* thread_local_instance);
-};
-
-class GTEST_API_ ThreadWithParamBase {
- public:
-  void Join();
-
- protected:
-  class Runnable {
-   public:
-    virtual ~Runnable() {}
-    virtual void Run() = 0;
-  };
-
-  ThreadWithParamBase(Runnable *runnable, Notification* thread_can_start);
-  virtual ~ThreadWithParamBase();
-
- private:
-  AutoHandle thread_;
-};
-
-// Helper class for testing Google Test's multi-threading constructs.
-template <typename T>
-class ThreadWithParam : public ThreadWithParamBase {
- public:
-  typedef void UserThreadFunc(T);
-
-  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
-      : ThreadWithParamBase(new RunnableImpl(func, param), thread_can_start) {
-  }
-  virtual ~ThreadWithParam() {}
-
- private:
-  class RunnableImpl : public Runnable {
-   public:
-    RunnableImpl(UserThreadFunc* func, T param)
-        : func_(func),
-          param_(param) {
-    }
-    virtual ~RunnableImpl() {}
-    virtual void Run() {
-      func_(param_);
-    }
-
-   private:
-    UserThreadFunc* const func_;
-    const T param_;
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(RunnableImpl);
-  };
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
-};
-
-// Implements thread-local storage on Windows systems.
-//
-//   // Thread 1
-//   ThreadLocal<int> tl(100);  // 100 is the default value for each thread.
-//
-//   // Thread 2
-//   tl.set(150);  // Changes the value for thread 2 only.
-//   EXPECT_EQ(150, tl.get());
-//
-//   // Thread 1
-//   EXPECT_EQ(100, tl.get());  // In thread 1, tl has the original value.
-//   tl.set(200);
-//   EXPECT_EQ(200, tl.get());
-//
-// The template type argument T must have a public copy constructor.
-// In addition, the default ThreadLocal constructor requires T to have
-// a public default constructor.
-//
-// The users of a TheadLocal instance have to make sure that all but one
-// threads (including the main one) using that instance have exited before
-// destroying it. Otherwise, the per-thread objects managed for them by the
-// ThreadLocal instance are not guaranteed to be destroyed on all platforms.
-//
-// Google Test only uses global ThreadLocal objects.  That means they
-// will die after main() has returned.  Therefore, no per-thread
-// object managed by Google Test will be leaked as long as all threads
-// using Google Test have exited when main() returns.
-template <typename T>
-class ThreadLocal : public ThreadLocalBase {
- public:
-  ThreadLocal() : default_factory_(new DefaultValueHolderFactory()) {}
-  explicit ThreadLocal(const T& value)
-      : default_factory_(new InstanceValueHolderFactory(value)) {}
-
-  ~ThreadLocal() { ThreadLocalRegistry::OnThreadLocalDestroyed(this); }
-
-  T* pointer() { return GetOrCreateValue(); }
-  const T* pointer() const { return GetOrCreateValue(); }
-  const T& get() const { return *pointer(); }
-  void set(const T& value) { *pointer() = value; }
-
- private:
-  // Holds a value of T.  Can be deleted via its base class without the caller
-  // knowing the type of T.
-  class ValueHolder : public ThreadLocalValueHolderBase {
-   public:
-    ValueHolder() : value_() {}
-    explicit ValueHolder(const T& value) : value_(value) {}
-
-    T* pointer() { return &value_; }
-
-   private:
-    T value_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
-  };
-
-
-  T* GetOrCreateValue() const {
-    return static_cast<ValueHolder*>(
-        ThreadLocalRegistry::GetValueOnCurrentThread(this))->pointer();
-  }
-
-  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const {
-    return default_factory_->MakeNewHolder();
-  }
-
-  class ValueHolderFactory {
-   public:
-    ValueHolderFactory() {}
-    virtual ~ValueHolderFactory() {}
-    virtual ValueHolder* MakeNewHolder() const = 0;
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
-  };
-
-  class DefaultValueHolderFactory : public ValueHolderFactory {
-   public:
-    DefaultValueHolderFactory() {}
-    ValueHolder* MakeNewHolder() const override { return new ValueHolder(); }
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
-  };
-
-  class InstanceValueHolderFactory : public ValueHolderFactory {
-   public:
-    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
-    ValueHolder* MakeNewHolder() const override {
-      return new ValueHolder(value_);
-    }
-
-   private:
-    const T value_;  // The value for each thread.
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
-  };
-
-  std::unique_ptr<ValueHolderFactory> default_factory_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
-};
-
-# elif GTEST_HAS_PTHREAD
-
-// MutexBase and Mutex implement mutex on pthreads-based platforms.
-class MutexBase {
- public:
-  // Acquires this mutex.
-  void Lock() {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_lock(&mutex_));
-    owner_ = pthread_self();
-    has_owner_ = true;
-  }
-
-  // Releases this mutex.
-  void Unlock() {
-    // Since the lock is being released the owner_ field should no longer be
-    // considered valid. We don't protect writing to has_owner_ here, as it's
-    // the caller's responsibility to ensure that the current thread holds the
-    // mutex when this is called.
-    has_owner_ = false;
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_unlock(&mutex_));
-  }
-
-  // Does nothing if the current thread holds the mutex. Otherwise, crashes
-  // with high probability.
-  void AssertHeld() const {
-    GTEST_CHECK_(has_owner_ && pthread_equal(owner_, pthread_self()))
-        << "The current thread is not holding the mutex @" << this;
-  }
-
-  // A static mutex may be used before main() is entered.  It may even
-  // be used before the dynamic initialization stage.  Therefore we
-  // must be able to initialize a static mutex object at link time.
-  // This means MutexBase has to be a POD and its member variables
-  // have to be public.
- public:
-  pthread_mutex_t mutex_;  // The underlying pthread mutex.
-  // has_owner_ indicates whether the owner_ field below contains a valid thread
-  // ID and is therefore safe to inspect (e.g., to use in pthread_equal()). All
-  // accesses to the owner_ field should be protected by a check of this field.
-  // An alternative might be to memset() owner_ to all zeros, but there's no
-  // guarantee that a zero'd pthread_t is necessarily invalid or even different
-  // from pthread_self().
-  bool has_owner_;
-  pthread_t owner_;  // The thread holding the mutex.
-};
-
-// Forward-declares a static mutex.
-#  define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
-     extern ::testing::internal::MutexBase mutex
-
-// Defines and statically (i.e. at link time) initializes a static mutex.
-// The initialization list here does not explicitly initialize each field,
-// instead relying on default initialization for the unspecified fields. In
-// particular, the owner_ field (a pthread_t) is not explicitly initialized.
-// This allows initialization to work whether pthread_t is a scalar or struct.
-// The flag -Wmissing-field-initializers must not be specified for this to work.
-#define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
-  ::testing::internal::MutexBase mutex = {PTHREAD_MUTEX_INITIALIZER, false, 0}
-
-// The Mutex class can only be used for mutexes created at runtime. It
-// shares its API with MutexBase otherwise.
-class Mutex : public MutexBase {
- public:
-  Mutex() {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_init(&mutex_, nullptr));
-    has_owner_ = false;
-  }
-  ~Mutex() {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_destroy(&mutex_));
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
-};
-
-// We cannot name this class MutexLock because the ctor declaration would
-// conflict with a macro named MutexLock, which is defined on some
-// platforms. That macro is used as a defensive measure to prevent against
-// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
-// "MutexLock l(&mu)".  Hence the typedef trick below.
-class GTestMutexLock {
- public:
-  explicit GTestMutexLock(MutexBase* mutex)
-      : mutex_(mutex) { mutex_->Lock(); }
-
-  ~GTestMutexLock() { mutex_->Unlock(); }
-
- private:
-  MutexBase* const mutex_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
-};
-
-typedef GTestMutexLock MutexLock;
-
-// Helpers for ThreadLocal.
-
-// pthread_key_create() requires DeleteThreadLocalValue() to have
-// C-linkage.  Therefore it cannot be templatized to access
-// ThreadLocal<T>.  Hence the need for class
-// ThreadLocalValueHolderBase.
-class ThreadLocalValueHolderBase {
- public:
-  virtual ~ThreadLocalValueHolderBase() {}
-};
-
-// Called by pthread to delete thread-local data stored by
-// pthread_setspecific().
-extern "C" inline void DeleteThreadLocalValue(void* value_holder) {
-  delete static_cast<ThreadLocalValueHolderBase*>(value_holder);
-}
-
-// Implements thread-local storage on pthreads-based systems.
-template <typename T>
-class GTEST_API_ ThreadLocal {
- public:
-  ThreadLocal()
-      : key_(CreateKey()), default_factory_(new DefaultValueHolderFactory()) {}
-  explicit ThreadLocal(const T& value)
-      : key_(CreateKey()),
-        default_factory_(new InstanceValueHolderFactory(value)) {}
-
-  ~ThreadLocal() {
-    // Destroys the managed object for the current thread, if any.
-    DeleteThreadLocalValue(pthread_getspecific(key_));
-
-    // Releases resources associated with the key.  This will *not*
-    // delete managed objects for other threads.
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_key_delete(key_));
-  }
-
-  T* pointer() { return GetOrCreateValue(); }
-  const T* pointer() const { return GetOrCreateValue(); }
-  const T& get() const { return *pointer(); }
-  void set(const T& value) { *pointer() = value; }
-
- private:
-  // Holds a value of type T.
-  class ValueHolder : public ThreadLocalValueHolderBase {
-   public:
-    ValueHolder() : value_() {}
-    explicit ValueHolder(const T& value) : value_(value) {}
-
-    T* pointer() { return &value_; }
-
-   private:
-    T value_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
-  };
-
-  static pthread_key_t CreateKey() {
-    pthread_key_t key;
-    // When a thread exits, DeleteThreadLocalValue() will be called on
-    // the object managed for that thread.
-    GTEST_CHECK_POSIX_SUCCESS_(
-        pthread_key_create(&key, &DeleteThreadLocalValue));
-    return key;
-  }
-
-  T* GetOrCreateValue() const {
-    ThreadLocalValueHolderBase* const holder =
-        static_cast<ThreadLocalValueHolderBase*>(pthread_getspecific(key_));
-    if (holder != nullptr) {
-      return CheckedDowncastToActualType<ValueHolder>(holder)->pointer();
-    }
-
-    ValueHolder* const new_holder = default_factory_->MakeNewHolder();
-    ThreadLocalValueHolderBase* const holder_base = new_holder;
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_setspecific(key_, holder_base));
-    return new_holder->pointer();
-  }
-
-  class ValueHolderFactory {
-   public:
-    ValueHolderFactory() {}
-    virtual ~ValueHolderFactory() {}
-    virtual ValueHolder* MakeNewHolder() const = 0;
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
-  };
-
-  class DefaultValueHolderFactory : public ValueHolderFactory {
-   public:
-    DefaultValueHolderFactory() {}
-    ValueHolder* MakeNewHolder() const override { return new ValueHolder(); }
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
-  };
-
-  class InstanceValueHolderFactory : public ValueHolderFactory {
-   public:
-    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
-    ValueHolder* MakeNewHolder() const override {
-      return new ValueHolder(value_);
-    }
-
-   private:
-    const T value_;  // The value for each thread.
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
-  };
-
-  // A key pthreads uses for looking up per-thread values.
-  const pthread_key_t key_;
-  std::unique_ptr<ValueHolderFactory> default_factory_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
-};
-
-# endif  // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
-
-#else  // GTEST_IS_THREADSAFE
-
-// A dummy implementation of synchronization primitives (mutex, lock,
-// and thread-local variable).  Necessary for compiling Google Test where
-// mutex is not supported - using Google Test in multiple threads is not
-// supported on such platforms.
-
-class Mutex {
- public:
-  Mutex() {}
-  void Lock() {}
-  void Unlock() {}
-  void AssertHeld() const {}
-};
-
-# define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
-  extern ::testing::internal::Mutex mutex
-
-# define GTEST_DEFINE_STATIC_MUTEX_(mutex) ::testing::internal::Mutex mutex
-
-// We cannot name this class MutexLock because the ctor declaration would
-// conflict with a macro named MutexLock, which is defined on some
-// platforms. That macro is used as a defensive measure to prevent against
-// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
-// "MutexLock l(&mu)".  Hence the typedef trick below.
-class GTestMutexLock {
- public:
-  explicit GTestMutexLock(Mutex*) {}  // NOLINT
-};
-
-typedef GTestMutexLock MutexLock;
-
-template <typename T>
-class GTEST_API_ ThreadLocal {
- public:
-  ThreadLocal() : value_() {}
-  explicit ThreadLocal(const T& value) : value_(value) {}
-  T* pointer() { return &value_; }
-  const T* pointer() const { return &value_; }
-  const T& get() const { return value_; }
-  void set(const T& value) { value_ = value; }
- private:
-  T value_;
-};
-
-#endif  // GTEST_IS_THREADSAFE
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-GTEST_API_ size_t GetThreadCount();
-
-#if GTEST_OS_WINDOWS
-# define GTEST_PATH_SEP_ "\\"
-# define GTEST_HAS_ALT_PATH_SEP_ 1
-#else
-# define GTEST_PATH_SEP_ "/"
-# define GTEST_HAS_ALT_PATH_SEP_ 0
-#endif  // GTEST_OS_WINDOWS
-
-// Utilities for char.
-
-// isspace(int ch) and friends accept an unsigned char or EOF.  char
-// may be signed, depending on the compiler (or compiler flags).
-// Therefore we need to cast a char to unsigned char before calling
-// isspace(), etc.
-
-inline bool IsAlpha(char ch) {
-  return isalpha(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsAlNum(char ch) {
-  return isalnum(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsDigit(char ch) {
-  return isdigit(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsLower(char ch) {
-  return islower(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsSpace(char ch) {
-  return isspace(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsUpper(char ch) {
-  return isupper(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsXDigit(char ch) {
-  return isxdigit(static_cast<unsigned char>(ch)) != 0;
-}
-#ifdef __cpp_char8_t
-inline bool IsXDigit(char8_t ch) {
-  return isxdigit(static_cast<unsigned char>(ch)) != 0;
-}
-#endif
-inline bool IsXDigit(char16_t ch) {
-  const unsigned char low_byte = static_cast<unsigned char>(ch);
-  return ch == low_byte && isxdigit(low_byte) != 0;
-}
-inline bool IsXDigit(char32_t ch) {
-  const unsigned char low_byte = static_cast<unsigned char>(ch);
-  return ch == low_byte && isxdigit(low_byte) != 0;
-}
-inline bool IsXDigit(wchar_t ch) {
-  const unsigned char low_byte = static_cast<unsigned char>(ch);
-  return ch == low_byte && isxdigit(low_byte) != 0;
-}
-
-inline char ToLower(char ch) {
-  return static_cast<char>(tolower(static_cast<unsigned char>(ch)));
-}
-inline char ToUpper(char ch) {
-  return static_cast<char>(toupper(static_cast<unsigned char>(ch)));
-}
-
-inline std::string StripTrailingSpaces(std::string str) {
-  std::string::iterator it = str.end();
-  while (it != str.begin() && IsSpace(*--it))
-    it = str.erase(it);
-  return str;
-}
-
-// The testing::internal::posix namespace holds wrappers for common
-// POSIX functions.  These wrappers hide the differences between
-// Windows/MSVC and POSIX systems.  Since some compilers define these
-// standard functions as macros, the wrapper cannot have the same name
-// as the wrapped function.
-
-namespace posix {
-
-// Functions with a different name on Windows.
-
-#if GTEST_OS_WINDOWS
-
-typedef struct _stat StatStruct;
-
-# ifdef __BORLANDC__
-inline int DoIsATTY(int fd) { return isatty(fd); }
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return stricmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return strdup(src); }
-# else  // !__BORLANDC__
-#  if GTEST_OS_WINDOWS_MOBILE
-inline int DoIsATTY(int /* fd */) { return 0; }
-#  else
-inline int DoIsATTY(int fd) { return _isatty(fd); }
-#  endif  // GTEST_OS_WINDOWS_MOBILE
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return _stricmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return _strdup(src); }
-# endif  // __BORLANDC__
-
-# if GTEST_OS_WINDOWS_MOBILE
-inline int FileNo(FILE* file) { return reinterpret_cast<int>(_fileno(file)); }
-// Stat(), RmDir(), and IsDir() are not needed on Windows CE at this
-// time and thus not defined there.
-# else
-inline int FileNo(FILE* file) { return _fileno(file); }
-inline int Stat(const char* path, StatStruct* buf) { return _stat(path, buf); }
-inline int RmDir(const char* dir) { return _rmdir(dir); }
-inline bool IsDir(const StatStruct& st) {
-  return (_S_IFDIR & st.st_mode) != 0;
-}
-# endif  // GTEST_OS_WINDOWS_MOBILE
-
-#elif GTEST_OS_ESP8266
-typedef struct stat StatStruct;
-
-inline int FileNo(FILE* file) { return fileno(file); }
-inline int DoIsATTY(int fd) { return isatty(fd); }
-inline int Stat(const char* path, StatStruct* buf) {
-  // stat function not implemented on ESP8266
-  return 0;
-}
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return strcasecmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return strdup(src); }
-inline int RmDir(const char* dir) { return rmdir(dir); }
-inline bool IsDir(const StatStruct& st) { return S_ISDIR(st.st_mode); }
-
-#else
-
-typedef struct stat StatStruct;
-
-inline int FileNo(FILE* file) { return fileno(file); }
-inline int DoIsATTY(int fd) { return isatty(fd); }
-inline int Stat(const char* path, StatStruct* buf) { return stat(path, buf); }
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return strcasecmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return strdup(src); }
-inline int RmDir(const char* dir) { return rmdir(dir); }
-inline bool IsDir(const StatStruct& st) { return S_ISDIR(st.st_mode); }
-
-#endif  // GTEST_OS_WINDOWS
-
-inline int IsATTY(int fd) {
-  // DoIsATTY might change errno (for example ENOTTY in case you redirect stdout
-  // to a file on Linux), which is unexpected, so save the previous value, and
-  // restore it after the call.
-  int savedErrno = errno;
-  int isAttyValue = DoIsATTY(fd);
-  errno = savedErrno;
-
-  return isAttyValue;
-}
-
-// Functions deprecated by MSVC 8.0.
-
-GTEST_DISABLE_MSC_DEPRECATED_PUSH_()
-
-// ChDir(), FReopen(), FDOpen(), Read(), Write(), Close(), and
-// StrError() aren't needed on Windows CE at this time and thus not
-// defined there.
-
-#if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && \
-    !GTEST_OS_WINDOWS_RT && !GTEST_OS_ESP8266 && !GTEST_OS_XTENSA
-inline int ChDir(const char* dir) { return chdir(dir); }
-#endif
-inline FILE* FOpen(const char* path, const char* mode) {
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
-  struct wchar_codecvt : public std::codecvt<wchar_t, char, std::mbstate_t> {};
-  std::wstring_convert<wchar_codecvt> converter;
-  std::wstring wide_path = converter.from_bytes(path);
-  std::wstring wide_mode = converter.from_bytes(mode);
-  return _wfopen(wide_path.c_str(), wide_mode.c_str());
-#else  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
-  return fopen(path, mode);
-#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
-}
-#if !GTEST_OS_WINDOWS_MOBILE
-inline FILE *FReopen(const char* path, const char* mode, FILE* stream) {
-  return freopen(path, mode, stream);
-}
-inline FILE* FDOpen(int fd, const char* mode) { return fdopen(fd, mode); }
-#endif
-inline int FClose(FILE* fp) { return fclose(fp); }
-#if !GTEST_OS_WINDOWS_MOBILE
-inline int Read(int fd, void* buf, unsigned int count) {
-  return static_cast<int>(read(fd, buf, count));
-}
-inline int Write(int fd, const void* buf, unsigned int count) {
-  return static_cast<int>(write(fd, buf, count));
-}
-inline int Close(int fd) { return close(fd); }
-inline const char* StrError(int errnum) { return strerror(errnum); }
-#endif
-inline const char* GetEnv(const char* name) {
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE || \
-    GTEST_OS_WINDOWS_RT || GTEST_OS_ESP8266 || GTEST_OS_XTENSA
-  // We are on an embedded platform, which has no environment variables.
-  static_cast<void>(name);  // To prevent 'unused argument' warning.
-  return nullptr;
-#elif defined(__BORLANDC__) || defined(__SunOS_5_8) || defined(__SunOS_5_9)
-  // Environment variables which we programmatically clear will be set to the
-  // empty string rather than unset (NULL).  Handle that case.
-  const char* const env = getenv(name);
-  return (env != nullptr && env[0] != '\0') ? env : nullptr;
-#else
-  return getenv(name);
-#endif
-}
-
-GTEST_DISABLE_MSC_DEPRECATED_POP_()
-
-#if GTEST_OS_WINDOWS_MOBILE
-// Windows CE has no C library. The abort() function is used in
-// several places in Google Test. This implementation provides a reasonable
-// imitation of standard behaviour.
-[[noreturn]] void Abort();
-#else
-[[noreturn]] inline void Abort() { abort(); }
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-}  // namespace posix
-
-// MSVC "deprecates" snprintf and issues warnings wherever it is used.  In
-// order to avoid these warnings, we need to use _snprintf or _snprintf_s on
-// MSVC-based platforms.  We map the GTEST_SNPRINTF_ macro to the appropriate
-// function in order to achieve that.  We use macro definition here because
-// snprintf is a variadic function.
-#if _MSC_VER && !GTEST_OS_WINDOWS_MOBILE
-// MSVC 2005 and above support variadic macros.
-# define GTEST_SNPRINTF_(buffer, size, format, ...) \
-     _snprintf_s(buffer, size, size, format, __VA_ARGS__)
-#elif defined(_MSC_VER)
-// Windows CE does not define _snprintf_s
-# define GTEST_SNPRINTF_ _snprintf
-#else
-# define GTEST_SNPRINTF_ snprintf
-#endif
-
-// The biggest signed integer type the compiler supports.
-//
-// long long is guaranteed to be at least 64-bits in C++11.
-using BiggestInt = long long;  // NOLINT
-
-// The maximum number a BiggestInt can represent.
-constexpr BiggestInt kMaxBiggestInt = (std::numeric_limits<BiggestInt>::max)();
-
-// This template class serves as a compile-time function from size to
-// type.  It maps a size in bytes to a primitive type with that
-// size. e.g.
-//
-//   TypeWithSize<4>::UInt
-//
-// is typedef-ed to be unsigned int (unsigned integer made up of 4
-// bytes).
-//
-// Such functionality should belong to STL, but I cannot find it
-// there.
-//
-// Google Test uses this class in the implementation of floating-point
-// comparison.
-//
-// For now it only handles UInt (unsigned int) as that's all Google Test
-// needs.  Other types can be easily added in the future if need
-// arises.
-template <size_t size>
-class TypeWithSize {
- public:
-  // This prevents the user from using TypeWithSize<N> with incorrect
-  // values of N.
-  using UInt = void;
-};
-
-// The specialization for size 4.
-template <>
-class TypeWithSize<4> {
- public:
-  using Int = std::int32_t;
-  using UInt = std::uint32_t;
-};
-
-// The specialization for size 8.
-template <>
-class TypeWithSize<8> {
- public:
-  using Int = std::int64_t;
-  using UInt = std::uint64_t;
-};
-
-// Integer types of known sizes.
-using TimeInMillis = int64_t;  // Represents time in milliseconds.
-
-// Utilities for command line flags and environment variables.
-
-// Macro for referencing flags.
-#if !defined(GTEST_FLAG)
-# define GTEST_FLAG(name) FLAGS_gtest_##name
-#endif  // !defined(GTEST_FLAG)
-
-#if !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
-# define GTEST_USE_OWN_FLAGFILE_FLAG_ 1
-#endif  // !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
-
-#if !defined(GTEST_DECLARE_bool_)
-# define GTEST_FLAG_SAVER_ ::testing::internal::GTestFlagSaver
-
-// Macros for declaring flags.
-# define GTEST_DECLARE_bool_(name) GTEST_API_ extern bool GTEST_FLAG(name)
-# define GTEST_DECLARE_int32_(name) \
-    GTEST_API_ extern std::int32_t GTEST_FLAG(name)
-# define GTEST_DECLARE_string_(name) \
-    GTEST_API_ extern ::std::string GTEST_FLAG(name)
-
-// Macros for defining flags.
-# define GTEST_DEFINE_bool_(name, default_val, doc) \
-    GTEST_API_ bool GTEST_FLAG(name) = (default_val)
-# define GTEST_DEFINE_int32_(name, default_val, doc) \
-    GTEST_API_ std::int32_t GTEST_FLAG(name) = (default_val)
-# define GTEST_DEFINE_string_(name, default_val, doc) \
-    GTEST_API_ ::std::string GTEST_FLAG(name) = (default_val)
-
-#endif  // !defined(GTEST_DECLARE_bool_)
-
-// Thread annotations
-#if !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
-# define GTEST_EXCLUSIVE_LOCK_REQUIRED_(locks)
-# define GTEST_LOCK_EXCLUDED_(locks)
-#endif  // !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
-
-// Parses 'str' for a 32-bit signed integer.  If successful, writes the result
-// to *value and returns true; otherwise leaves *value unchanged and returns
-// false.
-GTEST_API_ bool ParseInt32(const Message& src_text, const char* str,
-                           int32_t* value);
-
-// Parses a bool/int32_t/string from the environment variable
-// corresponding to the given Google Test flag.
-bool BoolFromGTestEnv(const char* flag, bool default_val);
-GTEST_API_ int32_t Int32FromGTestEnv(const char* flag, int32_t default_val);
-std::string OutputFlagAlsoCheckEnvVar();
-const char* StringFromGTestEnv(const char* flag, const char* default_val);
-
-}  // namespace internal
-}  // namespace testing
-
-#if !defined(GTEST_INTERNAL_DEPRECATED)
-
-// Internal Macro to mark an API deprecated, for googletest usage only
-// Usage: class GTEST_INTERNAL_DEPRECATED(message) MyClass or
-// GTEST_INTERNAL_DEPRECATED(message) <return_type> myFunction(); Every usage of
-// a deprecated entity will trigger a warning when compiled with
-// `-Wdeprecated-declarations` option (clang, gcc, any __GNUC__ compiler).
-// For msvc /W3 option will need to be used
-// Note that for 'other' compilers this macro evaluates to nothing to prevent
-// compilations errors.
-#if defined(_MSC_VER)
-#define GTEST_INTERNAL_DEPRECATED(message) __declspec(deprecated(message))
-#elif defined(__GNUC__)
-#define GTEST_INTERNAL_DEPRECATED(message) __attribute__((deprecated(message)))
-#else
-#define GTEST_INTERNAL_DEPRECATED(message)
-#endif
-
-#endif  // !defined(GTEST_INTERNAL_DEPRECATED)
-
-#if GTEST_HAS_ABSL
-// Always use absl::any for UniversalPrinter<> specializations if googletest
-// is built with absl support.
-#define GTEST_INTERNAL_HAS_ANY 1
-#include "absl/types/any.h"
-namespace testing {
-namespace internal {
-using Any = ::absl::any;
-}  // namespace internal
-}  // namespace testing
-#else
-#ifdef __has_include
-#if __has_include(<any>) && __cplusplus >= 201703L
-// Otherwise for C++17 and higher use std::any for UniversalPrinter<>
-// specializations.
-#define GTEST_INTERNAL_HAS_ANY 1
-#include <any>
-namespace testing {
-namespace internal {
-using Any = ::std::any;
-}  // namespace internal
-}  // namespace testing
-// The case where absl is configured NOT to alias std::any is not
-// supported.
-#endif  // __has_include(<any>) && __cplusplus >= 201703L
-#endif  // __has_include
-#endif  // GTEST_HAS_ABSL
-
-#if GTEST_HAS_ABSL
-// Always use absl::optional for UniversalPrinter<> specializations if
-// googletest is built with absl support.
-#define GTEST_INTERNAL_HAS_OPTIONAL 1
-#include "absl/types/optional.h"
-namespace testing {
-namespace internal {
-template <typename T>
-using Optional = ::absl::optional<T>;
-}  // namespace internal
-}  // namespace testing
-#else
-#ifdef __has_include
-#if __has_include(<optional>) && __cplusplus >= 201703L
-// Otherwise for C++17 and higher use std::optional for UniversalPrinter<>
-// specializations.
-#define GTEST_INTERNAL_HAS_OPTIONAL 1
-#include <optional>
-namespace testing {
-namespace internal {
-template <typename T>
-using Optional = ::std::optional<T>;
-}  // namespace internal
-}  // namespace testing
-// The case where absl is configured NOT to alias std::optional is not
-// supported.
-#endif  // __has_include(<optional>) && __cplusplus >= 201703L
-#endif  // __has_include
-#endif  // GTEST_HAS_ABSL
-
-#if GTEST_HAS_ABSL
-// Always use absl::string_view for Matcher<> specializations if googletest
-// is built with absl support.
-# define GTEST_INTERNAL_HAS_STRING_VIEW 1
-#include "absl/strings/string_view.h"
-namespace testing {
-namespace internal {
-using StringView = ::absl::string_view;
-}  // namespace internal
-}  // namespace testing
-#else
-# ifdef __has_include
-#   if __has_include(<string_view>) && __cplusplus >= 201703L
-// Otherwise for C++17 and higher use std::string_view for Matcher<>
-// specializations.
-#   define GTEST_INTERNAL_HAS_STRING_VIEW 1
-#include <string_view>
-namespace testing {
-namespace internal {
-using StringView = ::std::string_view;
-}  // namespace internal
-}  // namespace testing
-// The case where absl is configured NOT to alias std::string_view is not
-// supported.
-#  endif  // __has_include(<string_view>) && __cplusplus >= 201703L
-# endif  // __has_include
-#endif  // GTEST_HAS_ABSL
-
-#if GTEST_HAS_ABSL
-// Always use absl::variant for UniversalPrinter<> specializations if googletest
-// is built with absl support.
-#define GTEST_INTERNAL_HAS_VARIANT 1
-#include "absl/types/variant.h"
-namespace testing {
-namespace internal {
-template <typename... T>
-using Variant = ::absl::variant<T...>;
-}  // namespace internal
-}  // namespace testing
-#else
-#ifdef __has_include
-#if __has_include(<variant>) && __cplusplus >= 201703L
-// Otherwise for C++17 and higher use std::variant for UniversalPrinter<>
-// specializations.
-#define GTEST_INTERNAL_HAS_VARIANT 1
-#include <variant>
-namespace testing {
-namespace internal {
-template <typename... T>
-using Variant = ::std::variant<T...>;
-}  // namespace internal
-}  // namespace testing
-// The case where absl is configured NOT to alias std::variant is not supported.
-#endif  // __has_include(<variant>) && __cplusplus >= 201703L
-#endif  // __has_include
-#endif  // GTEST_HAS_ABSL
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
-
-#if GTEST_OS_LINUX
-# include <stdlib.h>
-# include <sys/types.h>
-# include <sys/wait.h>
-# include <unistd.h>
-#endif  // GTEST_OS_LINUX
-
-#if GTEST_HAS_EXCEPTIONS
-# include <stdexcept>
-#endif
-
-#include <ctype.h>
-#include <float.h>
-#include <string.h>
-#include <cstdint>
-#include <iomanip>
-#include <limits>
-#include <map>
-#include <set>
-#include <string>
-#include <type_traits>
-#include <vector>
-
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the Message class.
-//
-// IMPORTANT NOTE: Due to limitation of the C++ language, we have to
-// leave some internal implementation details in this header file.
-// They are clearly marked by comments like this:
-//
-//   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-//
-// Such code is NOT meant to be used by a user directly, and is subject
-// to CHANGE WITHOUT NOTICE.  Therefore DO NOT DEPEND ON IT in a user
-// program!
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
-
-#include <limits>
-#include <memory>
-#include <sstream>
-
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-// Ensures that there is at least one operator<< in the global namespace.
-// See Message& operator<<(...) below for why.
-void operator<<(const testing::internal::Secret&, int);
-
-namespace testing {
-
-// The Message class works like an ostream repeater.
-//
-// Typical usage:
-//
-//   1. You stream a bunch of values to a Message object.
-//      It will remember the text in a stringstream.
-//   2. Then you stream the Message object to an ostream.
-//      This causes the text in the Message to be streamed
-//      to the ostream.
-//
-// For example;
-//
-//   testing::Message foo;
-//   foo << 1 << " != " << 2;
-//   std::cout << foo;
-//
-// will print "1 != 2".
-//
-// Message is not intended to be inherited from.  In particular, its
-// destructor is not virtual.
-//
-// Note that stringstream behaves differently in gcc and in MSVC.  You
-// can stream a NULL char pointer to it in the former, but not in the
-// latter (it causes an access violation if you do).  The Message
-// class hides this difference by treating a NULL char pointer as
-// "(null)".
-class GTEST_API_ Message {
- private:
-  // The type of basic IO manipulators (endl, ends, and flush) for
-  // narrow streams.
-  typedef std::ostream& (*BasicNarrowIoManip)(std::ostream&);
-
- public:
-  // Constructs an empty Message.
-  Message();
-
-  // Copy constructor.
-  Message(const Message& msg) : ss_(new ::std::stringstream) {  // NOLINT
-    *ss_ << msg.GetString();
-  }
-
-  // Constructs a Message from a C-string.
-  explicit Message(const char* str) : ss_(new ::std::stringstream) {
-    *ss_ << str;
-  }
-
-  // Streams a non-pointer value to this object.
-  template <typename T>
-  inline Message& operator <<(const T& val) {
-    // Some libraries overload << for STL containers.  These
-    // overloads are defined in the global namespace instead of ::std.
-    //
-    // C++'s symbol lookup rule (i.e. Koenig lookup) says that these
-    // overloads are visible in either the std namespace or the global
-    // namespace, but not other namespaces, including the testing
-    // namespace which Google Test's Message class is in.
-    //
-    // To allow STL containers (and other types that has a << operator
-    // defined in the global namespace) to be used in Google Test
-    // assertions, testing::Message must access the custom << operator
-    // from the global namespace.  With this using declaration,
-    // overloads of << defined in the global namespace and those
-    // visible via Koenig lookup are both exposed in this function.
-    using ::operator <<;
-    *ss_ << val;
-    return *this;
-  }
-
-  // Streams a pointer value to this object.
-  //
-  // This function is an overload of the previous one.  When you
-  // stream a pointer to a Message, this definition will be used as it
-  // is more specialized.  (The C++ Standard, section
-  // [temp.func.order].)  If you stream a non-pointer, then the
-  // previous definition will be used.
-  //
-  // The reason for this overload is that streaming a NULL pointer to
-  // ostream is undefined behavior.  Depending on the compiler, you
-  // may get "0", "(nil)", "(null)", or an access violation.  To
-  // ensure consistent result across compilers, we always treat NULL
-  // as "(null)".
-  template <typename T>
-  inline Message& operator <<(T* const& pointer) {  // NOLINT
-    if (pointer == nullptr) {
-      *ss_ << "(null)";
-    } else {
-      *ss_ << pointer;
-    }
-    return *this;
-  }
-
-  // Since the basic IO manipulators are overloaded for both narrow
-  // and wide streams, we have to provide this specialized definition
-  // of operator <<, even though its body is the same as the
-  // templatized version above.  Without this definition, streaming
-  // endl or other basic IO manipulators to Message will confuse the
-  // compiler.
-  Message& operator <<(BasicNarrowIoManip val) {
-    *ss_ << val;
-    return *this;
-  }
-
-  // Instead of 1/0, we want to see true/false for bool values.
-  Message& operator <<(bool b) {
-    return *this << (b ? "true" : "false");
-  }
-
-  // These two overloads allow streaming a wide C string to a Message
-  // using the UTF-8 encoding.
-  Message& operator <<(const wchar_t* wide_c_str);
-  Message& operator <<(wchar_t* wide_c_str);
-
-#if GTEST_HAS_STD_WSTRING
-  // Converts the given wide string to a narrow string using the UTF-8
-  // encoding, and streams the result to this Message object.
-  Message& operator <<(const ::std::wstring& wstr);
-#endif  // GTEST_HAS_STD_WSTRING
-
-  // Gets the text streamed to this object so far as an std::string.
-  // Each '\0' character in the buffer is replaced with "\\0".
-  //
-  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-  std::string GetString() const;
-
- private:
-  // We'll hold the text streamed to this object here.
-  const std::unique_ptr< ::std::stringstream> ss_;
-
-  // We declare (but don't implement) this to prevent the compiler
-  // from implementing the assignment operator.
-  void operator=(const Message&);
-};
-
-// Streams a Message to an ostream.
-inline std::ostream& operator <<(std::ostream& os, const Message& sb) {
-  return os << sb.GetString();
-}
-
-namespace internal {
-
-// Converts a streamable value to an std::string.  A NULL pointer is
-// converted to "(null)".  When the input value is a ::string,
-// ::std::string, ::wstring, or ::std::wstring object, each NUL
-// character in it is replaced with "\\0".
-template <typename T>
-std::string StreamableToString(const T& streamable) {
-  return (Message() << streamable).GetString();
-}
-
-}  // namespace internal
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Google Test filepath utilities
-//
-// This header file declares classes and functions used internally by
-// Google Test.  They are subject to change without notice.
-//
-// This file is #included in gtest/internal/gtest-internal.h.
-// Do not include this header file separately!
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
-
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file declares the String class and functions used internally by
-// Google Test.  They are subject to change without notice. They should not used
-// by code external to Google Test.
-//
-// This header file is #included by gtest-internal.h.
-// It should not be #included by other files.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
-
-#ifdef __BORLANDC__
-// string.h is not guaranteed to provide strcpy on C++ Builder.
-# include <mem.h>
-#endif
-
-#include <string.h>
-#include <cstdint>
-#include <string>
-
-
-namespace testing {
-namespace internal {
-
-// String - an abstract class holding static string utilities.
-class GTEST_API_ String {
- public:
-  // Static utility methods
-
-  // Clones a 0-terminated C string, allocating memory using new.  The
-  // caller is responsible for deleting the return value using
-  // delete[].  Returns the cloned string, or NULL if the input is
-  // NULL.
-  //
-  // This is different from strdup() in string.h, which allocates
-  // memory using malloc().
-  static const char* CloneCString(const char* c_str);
-
-#if GTEST_OS_WINDOWS_MOBILE
-  // Windows CE does not have the 'ANSI' versions of Win32 APIs. To be
-  // able to pass strings to Win32 APIs on CE we need to convert them
-  // to 'Unicode', UTF-16.
-
-  // Creates a UTF-16 wide string from the given ANSI string, allocating
-  // memory using new. The caller is responsible for deleting the return
-  // value using delete[]. Returns the wide string, or NULL if the
-  // input is NULL.
-  //
-  // The wide string is created using the ANSI codepage (CP_ACP) to
-  // match the behaviour of the ANSI versions of Win32 calls and the
-  // C runtime.
-  static LPCWSTR AnsiToUtf16(const char* c_str);
-
-  // Creates an ANSI string from the given wide string, allocating
-  // memory using new. The caller is responsible for deleting the return
-  // value using delete[]. Returns the ANSI string, or NULL if the
-  // input is NULL.
-  //
-  // The returned string is created using the ANSI codepage (CP_ACP) to
-  // match the behaviour of the ANSI versions of Win32 calls and the
-  // C runtime.
-  static const char* Utf16ToAnsi(LPCWSTR utf16_str);
-#endif
-
-  // Compares two C strings.  Returns true if and only if they have the same
-  // content.
-  //
-  // Unlike strcmp(), this function can handle NULL argument(s).  A
-  // NULL C string is considered different to any non-NULL C string,
-  // including the empty string.
-  static bool CStringEquals(const char* lhs, const char* rhs);
-
-  // Converts a wide C string to a String using the UTF-8 encoding.
-  // NULL will be converted to "(null)".  If an error occurred during
-  // the conversion, "(failed to convert from wide string)" is
-  // returned.
-  static std::string ShowWideCString(const wchar_t* wide_c_str);
-
-  // Compares two wide C strings.  Returns true if and only if they have the
-  // same content.
-  //
-  // Unlike wcscmp(), this function can handle NULL argument(s).  A
-  // NULL C string is considered different to any non-NULL C string,
-  // including the empty string.
-  static bool WideCStringEquals(const wchar_t* lhs, const wchar_t* rhs);
-
-  // Compares two C strings, ignoring case.  Returns true if and only if
-  // they have the same content.
-  //
-  // Unlike strcasecmp(), this function can handle NULL argument(s).
-  // A NULL C string is considered different to any non-NULL C string,
-  // including the empty string.
-  static bool CaseInsensitiveCStringEquals(const char* lhs,
-                                           const char* rhs);
-
-  // Compares two wide C strings, ignoring case.  Returns true if and only if
-  // they have the same content.
-  //
-  // Unlike wcscasecmp(), this function can handle NULL argument(s).
-  // A NULL C string is considered different to any non-NULL wide C string,
-  // including the empty string.
-  // NB: The implementations on different platforms slightly differ.
-  // On windows, this method uses _wcsicmp which compares according to LC_CTYPE
-  // environment variable. On GNU platform this method uses wcscasecmp
-  // which compares according to LC_CTYPE category of the current locale.
-  // On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
-  // current locale.
-  static bool CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
-                                               const wchar_t* rhs);
-
-  // Returns true if and only if the given string ends with the given suffix,
-  // ignoring case. Any string is considered to end with an empty suffix.
-  static bool EndsWithCaseInsensitive(
-      const std::string& str, const std::string& suffix);
-
-  // Formats an int value as "%02d".
-  static std::string FormatIntWidth2(int value);  // "%02d" for width == 2
-
-  // Formats an int value to given width with leading zeros.
-  static std::string FormatIntWidthN(int value, int width);
-
-  // Formats an int value as "%X".
-  static std::string FormatHexInt(int value);
-
-  // Formats an int value as "%X".
-  static std::string FormatHexUInt32(uint32_t value);
-
-  // Formats a byte as "%02X".
-  static std::string FormatByte(unsigned char value);
-
- private:
-  String();  // Not meant to be instantiated.
-};  // class String
-
-// Gets the content of the stringstream's buffer as an std::string.  Each '\0'
-// character in the buffer is replaced with "\\0".
-GTEST_API_ std::string StringStreamToString(::std::stringstream* stream);
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-namespace internal {
-
-// FilePath - a class for file and directory pathname manipulation which
-// handles platform-specific conventions (like the pathname separator).
-// Used for helper functions for naming files in a directory for xml output.
-// Except for Set methods, all methods are const or static, which provides an
-// "immutable value object" -- useful for peace of mind.
-// A FilePath with a value ending in a path separator ("like/this/") represents
-// a directory, otherwise it is assumed to represent a file. In either case,
-// it may or may not represent an actual file or directory in the file system.
-// Names are NOT checked for syntax correctness -- no checking for illegal
-// characters, malformed paths, etc.
-
-class GTEST_API_ FilePath {
- public:
-  FilePath() : pathname_("") { }
-  FilePath(const FilePath& rhs) : pathname_(rhs.pathname_) { }
-
-  explicit FilePath(const std::string& pathname) : pathname_(pathname) {
-    Normalize();
-  }
-
-  FilePath& operator=(const FilePath& rhs) {
-    Set(rhs);
-    return *this;
-  }
-
-  void Set(const FilePath& rhs) {
-    pathname_ = rhs.pathname_;
-  }
-
-  const std::string& string() const { return pathname_; }
-  const char* c_str() const { return pathname_.c_str(); }
-
-  // Returns the current working directory, or "" if unsuccessful.
-  static FilePath GetCurrentDir();
-
-  // Given directory = "dir", base_name = "test", number = 0,
-  // extension = "xml", returns "dir/test.xml". If number is greater
-  // than zero (e.g., 12), returns "dir/test_12.xml".
-  // On Windows platform, uses \ as the separator rather than /.
-  static FilePath MakeFileName(const FilePath& directory,
-                               const FilePath& base_name,
-                               int number,
-                               const char* extension);
-
-  // Given directory = "dir", relative_path = "test.xml",
-  // returns "dir/test.xml".
-  // On Windows, uses \ as the separator rather than /.
-  static FilePath ConcatPaths(const FilePath& directory,
-                              const FilePath& relative_path);
-
-  // Returns a pathname for a file that does not currently exist. The pathname
-  // will be directory/base_name.extension or
-  // directory/base_name_<number>.extension if directory/base_name.extension
-  // already exists. The number will be incremented until a pathname is found
-  // that does not already exist.
-  // Examples: 'dir/foo_test.xml' or 'dir/foo_test_1.xml'.
-  // There could be a race condition if two or more processes are calling this
-  // function at the same time -- they could both pick the same filename.
-  static FilePath GenerateUniqueFileName(const FilePath& directory,
-                                         const FilePath& base_name,
-                                         const char* extension);
-
-  // Returns true if and only if the path is "".
-  bool IsEmpty() const { return pathname_.empty(); }
-
-  // If input name has a trailing separator character, removes it and returns
-  // the name, otherwise return the name string unmodified.
-  // On Windows platform, uses \ as the separator, other platforms use /.
-  FilePath RemoveTrailingPathSeparator() const;
-
-  // Returns a copy of the FilePath with the directory part removed.
-  // Example: FilePath("path/to/file").RemoveDirectoryName() returns
-  // FilePath("file"). If there is no directory part ("just_a_file"), it returns
-  // the FilePath unmodified. If there is no file part ("just_a_dir/") it
-  // returns an empty FilePath ("").
-  // On Windows platform, '\' is the path separator, otherwise it is '/'.
-  FilePath RemoveDirectoryName() const;
-
-  // RemoveFileName returns the directory path with the filename removed.
-  // Example: FilePath("path/to/file").RemoveFileName() returns "path/to/".
-  // If the FilePath is "a_file" or "/a_file", RemoveFileName returns
-  // FilePath("./") or, on Windows, FilePath(".\\"). If the filepath does
-  // not have a file, like "just/a/dir/", it returns the FilePath unmodified.
-  // On Windows platform, '\' is the path separator, otherwise it is '/'.
-  FilePath RemoveFileName() const;
-
-  // Returns a copy of the FilePath with the case-insensitive extension removed.
-  // Example: FilePath("dir/file.exe").RemoveExtension("EXE") returns
-  // FilePath("dir/file"). If a case-insensitive extension is not
-  // found, returns a copy of the original FilePath.
-  FilePath RemoveExtension(const char* extension) const;
-
-  // Creates directories so that path exists. Returns true if successful or if
-  // the directories already exist; returns false if unable to create
-  // directories for any reason. Will also return false if the FilePath does
-  // not represent a directory (that is, it doesn't end with a path separator).
-  bool CreateDirectoriesRecursively() const;
-
-  // Create the directory so that path exists. Returns true if successful or
-  // if the directory already exists; returns false if unable to create the
-  // directory for any reason, including if the parent directory does not
-  // exist. Not named "CreateDirectory" because that's a macro on Windows.
-  bool CreateFolder() const;
-
-  // Returns true if FilePath describes something in the file-system,
-  // either a file, directory, or whatever, and that something exists.
-  bool FileOrDirectoryExists() const;
-
-  // Returns true if pathname describes a directory in the file-system
-  // that exists.
-  bool DirectoryExists() const;
-
-  // Returns true if FilePath ends with a path separator, which indicates that
-  // it is intended to represent a directory. Returns false otherwise.
-  // This does NOT check that a directory (or file) actually exists.
-  bool IsDirectory() const;
-
-  // Returns true if pathname describes a root directory. (Windows has one
-  // root directory per disk drive.)
-  bool IsRootDirectory() const;
-
-  // Returns true if pathname describes an absolute path.
-  bool IsAbsolutePath() const;
-
- private:
-  // Replaces multiple consecutive separators with a single separator.
-  // For example, "bar///foo" becomes "bar/foo". Does not eliminate other
-  // redundancies that might be in a pathname involving "." or "..".
-  //
-  // A pathname with multiple consecutive separators may occur either through
-  // user error or as a result of some scripts or APIs that generate a pathname
-  // with a trailing separator. On other platforms the same API or script
-  // may NOT generate a pathname with a trailing "/". Then elsewhere that
-  // pathname may have another "/" and pathname components added to it,
-  // without checking for the separator already being there.
-  // The script language and operating system may allow paths like "foo//bar"
-  // but some of the functions in FilePath will not handle that correctly. In
-  // particular, RemoveTrailingPathSeparator() only removes one separator, and
-  // it is called in CreateDirectoriesRecursively() assuming that it will change
-  // a pathname from directory syntax (trailing separator) to filename syntax.
-  //
-  // On Windows this method also replaces the alternate path separator '/' with
-  // the primary path separator '\\', so that for example "bar\\/\\foo" becomes
-  // "bar\\foo".
-
-  void Normalize();
-
-  // Returns a pointer to the last occurrence of a valid path separator in
-  // the FilePath. On Windows, for example, both '/' and '\' are valid path
-  // separators. Returns NULL if no path separator was found.
-  const char* FindLastPathSeparator() const;
-
-  std::string pathname_;
-};  // class FilePath
-
-}  // namespace internal
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Type utilities needed for implementing typed and type-parameterized
-// tests.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
-
-
-// #ifdef __GNUC__ is too general here.  It is possible to use gcc without using
-// libstdc++ (which is where cxxabi.h comes from).
-# if GTEST_HAS_CXXABI_H_
-#  include <cxxabi.h>
-# elif defined(__HP_aCC)
-#  include <acxx_demangle.h>
-# endif  // GTEST_HASH_CXXABI_H_
-
-namespace testing {
-namespace internal {
-
-// Canonicalizes a given name with respect to the Standard C++ Library.
-// This handles removing the inline namespace within `std` that is
-// used by various standard libraries (e.g., `std::__1`).  Names outside
-// of namespace std are returned unmodified.
-inline std::string CanonicalizeForStdLibVersioning(std::string s) {
-  static const char prefix[] = "std::__";
-  if (s.compare(0, strlen(prefix), prefix) == 0) {
-    std::string::size_type end = s.find("::", strlen(prefix));
-    if (end != s.npos) {
-      // Erase everything between the initial `std` and the second `::`.
-      s.erase(strlen("std"), end - strlen("std"));
-    }
-  }
-  return s;
-}
-
-#if GTEST_HAS_RTTI
-// GetTypeName(const std::type_info&) returns a human-readable name of type T.
-inline std::string GetTypeName(const std::type_info& type) {
-  const char* const name = type.name();
-#if GTEST_HAS_CXXABI_H_ || defined(__HP_aCC)
-  int status = 0;
-  // gcc's implementation of typeid(T).name() mangles the type name,
-  // so we have to demangle it.
-#if GTEST_HAS_CXXABI_H_
-  using abi::__cxa_demangle;
-#endif  // GTEST_HAS_CXXABI_H_
-  char* const readable_name = __cxa_demangle(name, nullptr, nullptr, &status);
-  const std::string name_str(status == 0 ? readable_name : name);
-  free(readable_name);
-  return CanonicalizeForStdLibVersioning(name_str);
-#else
-  return name;
-#endif  // GTEST_HAS_CXXABI_H_ || __HP_aCC
-}
-#endif  // GTEST_HAS_RTTI
-
-// GetTypeName<T>() returns a human-readable name of type T if and only if
-// RTTI is enabled, otherwise it returns a dummy type name.
-// NB: This function is also used in Google Mock, so don't move it inside of
-// the typed-test-only section below.
-template <typename T>
-std::string GetTypeName() {
-#if GTEST_HAS_RTTI
-  return GetTypeName(typeid(T));
-#else
-  return "<type>";
-#endif  // GTEST_HAS_RTTI
-}
-
-// A unique type indicating an empty node
-struct None {};
-
-# define GTEST_TEMPLATE_ template <typename T> class
-
-// The template "selector" struct TemplateSel<Tmpl> is used to
-// represent Tmpl, which must be a class template with one type
-// parameter, as a type.  TemplateSel<Tmpl>::Bind<T>::type is defined
-// as the type Tmpl<T>.  This allows us to actually instantiate the
-// template "selected" by TemplateSel<Tmpl>.
-//
-// This trick is necessary for simulating typedef for class templates,
-// which C++ doesn't support directly.
-template <GTEST_TEMPLATE_ Tmpl>
-struct TemplateSel {
-  template <typename T>
-  struct Bind {
-    typedef Tmpl<T> type;
-  };
-};
-
-# define GTEST_BIND_(TmplSel, T) \
-  TmplSel::template Bind<T>::type
-
-template <GTEST_TEMPLATE_ Head_, GTEST_TEMPLATE_... Tail_>
-struct Templates {
-  using Head = TemplateSel<Head_>;
-  using Tail = Templates<Tail_...>;
-};
-
-template <GTEST_TEMPLATE_ Head_>
-struct Templates<Head_> {
-  using Head = TemplateSel<Head_>;
-  using Tail = None;
-};
-
-// Tuple-like type lists
-template <typename Head_, typename... Tail_>
-struct Types {
-  using Head = Head_;
-  using Tail = Types<Tail_...>;
-};
-
-template <typename Head_>
-struct Types<Head_> {
-  using Head = Head_;
-  using Tail = None;
-};
-
-// Helper metafunctions to tell apart a single type from types
-// generated by ::testing::Types
-template <typename... Ts>
-struct ProxyTypeList {
-  using type = Types<Ts...>;
-};
-
-template <typename>
-struct is_proxy_type_list : std::false_type {};
-
-template <typename... Ts>
-struct is_proxy_type_list<ProxyTypeList<Ts...>> : std::true_type {};
-
-// Generator which conditionally creates type lists.
-// It recognizes if a requested type list should be created
-// and prevents creating a new type list nested within another one.
-template <typename T>
-struct GenerateTypeList {
- private:
-  using proxy = typename std::conditional<is_proxy_type_list<T>::value, T,
-                                          ProxyTypeList<T>>::type;
-
- public:
-  using type = typename proxy::type;
-};
-
-}  // namespace internal
-
-template <typename... Ts>
-using Types = internal::ProxyTypeList<Ts...>;
-
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
-
-// Due to C++ preprocessor weirdness, we need double indirection to
-// concatenate two tokens when one of them is __LINE__.  Writing
-//
-//   foo ## __LINE__
-//
-// will result in the token foo__LINE__, instead of foo followed by
-// the current line number.  For more details, see
-// http://www.parashift.com/c++-faq-lite/misc-technical-issues.html#faq-39.6
-#define GTEST_CONCAT_TOKEN_(foo, bar) GTEST_CONCAT_TOKEN_IMPL_(foo, bar)
-#define GTEST_CONCAT_TOKEN_IMPL_(foo, bar) foo ## bar
-
-// Stringifies its argument.
-// Work around a bug in visual studio which doesn't accept code like this:
-//
-//   #define GTEST_STRINGIFY_(name) #name
-//   #define MACRO(a, b, c) ... GTEST_STRINGIFY_(a) ...
-//   MACRO(, x, y)
-//
-// Complaining about the argument to GTEST_STRINGIFY_ being empty.
-// This is allowed by the spec.
-#define GTEST_STRINGIFY_HELPER_(name, ...) #name
-#define GTEST_STRINGIFY_(...) GTEST_STRINGIFY_HELPER_(__VA_ARGS__, )
-
-namespace proto2 {
-class MessageLite;
-}
-
-namespace testing {
-
-// Forward declarations.
-
-class AssertionResult;                 // Result of an assertion.
-class Message;                         // Represents a failure message.
-class Test;                            // Represents a test.
-class TestInfo;                        // Information about a test.
-class TestPartResult;                  // Result of a test part.
-class UnitTest;                        // A collection of test suites.
-
-template <typename T>
-::std::string PrintToString(const T& value);
-
-namespace internal {
-
-struct TraceInfo;                      // Information about a trace point.
-class TestInfoImpl;                    // Opaque implementation of TestInfo
-class UnitTestImpl;                    // Opaque implementation of UnitTest
-
-// The text used in failure messages to indicate the start of the
-// stack trace.
-GTEST_API_ extern const char kStackTraceMarker[];
-
-// An IgnoredValue object can be implicitly constructed from ANY value.
-class IgnoredValue {
-  struct Sink {};
- public:
-  // This constructor template allows any value to be implicitly
-  // converted to IgnoredValue.  The object has no data member and
-  // doesn't try to remember anything about the argument.  We
-  // deliberately omit the 'explicit' keyword in order to allow the
-  // conversion to be implicit.
-  // Disable the conversion if T already has a magical conversion operator.
-  // Otherwise we get ambiguity.
-  template <typename T,
-            typename std::enable_if<!std::is_convertible<T, Sink>::value,
-                                    int>::type = 0>
-  IgnoredValue(const T& /* ignored */) {}  // NOLINT(runtime/explicit)
-};
-
-// Appends the user-supplied message to the Google-Test-generated message.
-GTEST_API_ std::string AppendUserMessage(
-    const std::string& gtest_msg, const Message& user_msg);
-
-#if GTEST_HAS_EXCEPTIONS
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4275 \
-/* an exported class was derived from a class that was not exported */)
-
-// This exception is thrown by (and only by) a failed Google Test
-// assertion when GTEST_FLAG(throw_on_failure) is true (if exceptions
-// are enabled).  We derive it from std::runtime_error, which is for
-// errors presumably detectable only at run time.  Since
-// std::runtime_error inherits from std::exception, many testing
-// frameworks know how to extract and print the message inside it.
-class GTEST_API_ GoogleTestFailureException : public ::std::runtime_error {
- public:
-  explicit GoogleTestFailureException(const TestPartResult& failure);
-};
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4275
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-namespace edit_distance {
-// Returns the optimal edits to go from 'left' to 'right'.
-// All edits cost the same, with replace having lower priority than
-// add/remove.
-// Simple implementation of the Wagner-Fischer algorithm.
-// See http://en.wikipedia.org/wiki/Wagner-Fischer_algorithm
-enum EditType { kMatch, kAdd, kRemove, kReplace };
-GTEST_API_ std::vector<EditType> CalculateOptimalEdits(
-    const std::vector<size_t>& left, const std::vector<size_t>& right);
-
-// Same as above, but the input is represented as strings.
-GTEST_API_ std::vector<EditType> CalculateOptimalEdits(
-    const std::vector<std::string>& left,
-    const std::vector<std::string>& right);
-
-// Create a diff of the input strings in Unified diff format.
-GTEST_API_ std::string CreateUnifiedDiff(const std::vector<std::string>& left,
-                                         const std::vector<std::string>& right,
-                                         size_t context = 2);
-
-}  // namespace edit_distance
-
-// Calculate the diff between 'left' and 'right' and return it in unified diff
-// format.
-// If not null, stores in 'total_line_count' the total number of lines found
-// in left + right.
-GTEST_API_ std::string DiffStrings(const std::string& left,
-                                   const std::string& right,
-                                   size_t* total_line_count);
-
-// Constructs and returns the message for an equality assertion
-// (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
-//
-// The first four parameters are the expressions used in the assertion
-// and their values, as strings.  For example, for ASSERT_EQ(foo, bar)
-// where foo is 5 and bar is 6, we have:
-//
-//   expected_expression: "foo"
-//   actual_expression:   "bar"
-//   expected_value:      "5"
-//   actual_value:        "6"
-//
-// The ignoring_case parameter is true if and only if the assertion is a
-// *_STRCASEEQ*.  When it's true, the string " (ignoring case)" will
-// be inserted into the message.
-GTEST_API_ AssertionResult EqFailure(const char* expected_expression,
-                                     const char* actual_expression,
-                                     const std::string& expected_value,
-                                     const std::string& actual_value,
-                                     bool ignoring_case);
-
-// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
-GTEST_API_ std::string GetBoolAssertionFailureMessage(
-    const AssertionResult& assertion_result,
-    const char* expression_text,
-    const char* actual_predicate_value,
-    const char* expected_predicate_value);
-
-// This template class represents an IEEE floating-point number
-// (either single-precision or double-precision, depending on the
-// template parameters).
-//
-// The purpose of this class is to do more sophisticated number
-// comparison.  (Due to round-off error, etc, it's very unlikely that
-// two floating-points will be equal exactly.  Hence a naive
-// comparison by the == operation often doesn't work.)
-//
-// Format of IEEE floating-point:
-//
-//   The most-significant bit being the leftmost, an IEEE
-//   floating-point looks like
-//
-//     sign_bit exponent_bits fraction_bits
-//
-//   Here, sign_bit is a single bit that designates the sign of the
-//   number.
-//
-//   For float, there are 8 exponent bits and 23 fraction bits.
-//
-//   For double, there are 11 exponent bits and 52 fraction bits.
-//
-//   More details can be found at
-//   http://en.wikipedia.org/wiki/IEEE_floating-point_standard.
-//
-// Template parameter:
-//
-//   RawType: the raw floating-point type (either float or double)
-template <typename RawType>
-class FloatingPoint {
- public:
-  // Defines the unsigned integer type that has the same size as the
-  // floating point number.
-  typedef typename TypeWithSize<sizeof(RawType)>::UInt Bits;
-
-  // Constants.
-
-  // # of bits in a number.
-  static const size_t kBitCount = 8*sizeof(RawType);
-
-  // # of fraction bits in a number.
-  static const size_t kFractionBitCount =
-    std::numeric_limits<RawType>::digits - 1;
-
-  // # of exponent bits in a number.
-  static const size_t kExponentBitCount = kBitCount - 1 - kFractionBitCount;
-
-  // The mask for the sign bit.
-  static const Bits kSignBitMask = static_cast<Bits>(1) << (kBitCount - 1);
-
-  // The mask for the fraction bits.
-  static const Bits kFractionBitMask =
-    ~static_cast<Bits>(0) >> (kExponentBitCount + 1);
-
-  // The mask for the exponent bits.
-  static const Bits kExponentBitMask = ~(kSignBitMask | kFractionBitMask);
-
-  // How many ULP's (Units in the Last Place) we want to tolerate when
-  // comparing two numbers.  The larger the value, the more error we
-  // allow.  A 0 value means that two numbers must be exactly the same
-  // to be considered equal.
-  //
-  // The maximum error of a single floating-point operation is 0.5
-  // units in the last place.  On Intel CPU's, all floating-point
-  // calculations are done with 80-bit precision, while double has 64
-  // bits.  Therefore, 4 should be enough for ordinary use.
-  //
-  // See the following article for more details on ULP:
-  // http://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/
-  static const uint32_t kMaxUlps = 4;
-
-  // Constructs a FloatingPoint from a raw floating-point number.
-  //
-  // On an Intel CPU, passing a non-normalized NAN (Not a Number)
-  // around may change its bits, although the new value is guaranteed
-  // to be also a NAN.  Therefore, don't expect this constructor to
-  // preserve the bits in x when x is a NAN.
-  explicit FloatingPoint(const RawType& x) { u_.value_ = x; }
-
-  // Static methods
-
-  // Reinterprets a bit pattern as a floating-point number.
-  //
-  // This function is needed to test the AlmostEquals() method.
-  static RawType ReinterpretBits(const Bits bits) {
-    FloatingPoint fp(0);
-    fp.u_.bits_ = bits;
-    return fp.u_.value_;
-  }
-
-  // Returns the floating-point number that represent positive infinity.
-  static RawType Infinity() {
-    return ReinterpretBits(kExponentBitMask);
-  }
-
-  // Returns the maximum representable finite floating-point number.
-  static RawType Max();
-
-  // Non-static methods
-
-  // Returns the bits that represents this number.
-  const Bits &bits() const { return u_.bits_; }
-
-  // Returns the exponent bits of this number.
-  Bits exponent_bits() const { return kExponentBitMask & u_.bits_; }
-
-  // Returns the fraction bits of this number.
-  Bits fraction_bits() const { return kFractionBitMask & u_.bits_; }
-
-  // Returns the sign bit of this number.
-  Bits sign_bit() const { return kSignBitMask & u_.bits_; }
-
-  // Returns true if and only if this is NAN (not a number).
-  bool is_nan() const {
-    // It's a NAN if the exponent bits are all ones and the fraction
-    // bits are not entirely zeros.
-    return (exponent_bits() == kExponentBitMask) && (fraction_bits() != 0);
-  }
-
-  // Returns true if and only if this number is at most kMaxUlps ULP's away
-  // from rhs.  In particular, this function:
-  //
-  //   - returns false if either number is (or both are) NAN.
-  //   - treats really large numbers as almost equal to infinity.
-  //   - thinks +0.0 and -0.0 are 0 DLP's apart.
-  bool AlmostEquals(const FloatingPoint& rhs) const {
-    // The IEEE standard says that any comparison operation involving
-    // a NAN must return false.
-    if (is_nan() || rhs.is_nan()) return false;
-
-    return DistanceBetweenSignAndMagnitudeNumbers(u_.bits_, rhs.u_.bits_)
-        <= kMaxUlps;
-  }
-
- private:
-  // The data type used to store the actual floating-point number.
-  union FloatingPointUnion {
-    RawType value_;  // The raw floating-point number.
-    Bits bits_;      // The bits that represent the number.
-  };
-
-  // Converts an integer from the sign-and-magnitude representation to
-  // the biased representation.  More precisely, let N be 2 to the
-  // power of (kBitCount - 1), an integer x is represented by the
-  // unsigned number x + N.
-  //
-  // For instance,
-  //
-  //   -N + 1 (the most negative number representable using
-  //          sign-and-magnitude) is represented by 1;
-  //   0      is represented by N; and
-  //   N - 1  (the biggest number representable using
-  //          sign-and-magnitude) is represented by 2N - 1.
-  //
-  // Read http://en.wikipedia.org/wiki/Signed_number_representations
-  // for more details on signed number representations.
-  static Bits SignAndMagnitudeToBiased(const Bits &sam) {
-    if (kSignBitMask & sam) {
-      // sam represents a negative number.
-      return ~sam + 1;
-    } else {
-      // sam represents a positive number.
-      return kSignBitMask | sam;
-    }
-  }
-
-  // Given two numbers in the sign-and-magnitude representation,
-  // returns the distance between them as an unsigned number.
-  static Bits DistanceBetweenSignAndMagnitudeNumbers(const Bits &sam1,
-                                                     const Bits &sam2) {
-    const Bits biased1 = SignAndMagnitudeToBiased(sam1);
-    const Bits biased2 = SignAndMagnitudeToBiased(sam2);
-    return (biased1 >= biased2) ? (biased1 - biased2) : (biased2 - biased1);
-  }
-
-  FloatingPointUnion u_;
-};
-
-// We cannot use std::numeric_limits<T>::max() as it clashes with the max()
-// macro defined by <windows.h>.
-template <>
-inline float FloatingPoint<float>::Max() { return FLT_MAX; }
-template <>
-inline double FloatingPoint<double>::Max() { return DBL_MAX; }
-
-// Typedefs the instances of the FloatingPoint template class that we
-// care to use.
-typedef FloatingPoint<float> Float;
-typedef FloatingPoint<double> Double;
-
-// In order to catch the mistake of putting tests that use different
-// test fixture classes in the same test suite, we need to assign
-// unique IDs to fixture classes and compare them.  The TypeId type is
-// used to hold such IDs.  The user should treat TypeId as an opaque
-// type: the only operation allowed on TypeId values is to compare
-// them for equality using the == operator.
-typedef const void* TypeId;
-
-template <typename T>
-class TypeIdHelper {
- public:
-  // dummy_ must not have a const type.  Otherwise an overly eager
-  // compiler (e.g. MSVC 7.1 & 8.0) may try to merge
-  // TypeIdHelper<T>::dummy_ for different Ts as an "optimization".
-  static bool dummy_;
-};
-
-template <typename T>
-bool TypeIdHelper<T>::dummy_ = false;
-
-// GetTypeId<T>() returns the ID of type T.  Different values will be
-// returned for different types.  Calling the function twice with the
-// same type argument is guaranteed to return the same ID.
-template <typename T>
-TypeId GetTypeId() {
-  // The compiler is required to allocate a different
-  // TypeIdHelper<T>::dummy_ variable for each T used to instantiate
-  // the template.  Therefore, the address of dummy_ is guaranteed to
-  // be unique.
-  return &(TypeIdHelper<T>::dummy_);
-}
-
-// Returns the type ID of ::testing::Test.  Always call this instead
-// of GetTypeId< ::testing::Test>() to get the type ID of
-// ::testing::Test, as the latter may give the wrong result due to a
-// suspected linker bug when compiling Google Test as a Mac OS X
-// framework.
-GTEST_API_ TypeId GetTestTypeId();
-
-// Defines the abstract factory interface that creates instances
-// of a Test object.
-class TestFactoryBase {
- public:
-  virtual ~TestFactoryBase() {}
-
-  // Creates a test instance to run. The instance is both created and destroyed
-  // within TestInfoImpl::Run()
-  virtual Test* CreateTest() = 0;
-
- protected:
-  TestFactoryBase() {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestFactoryBase);
-};
-
-// This class provides implementation of TeastFactoryBase interface.
-// It is used in TEST and TEST_F macros.
-template <class TestClass>
-class TestFactoryImpl : public TestFactoryBase {
- public:
-  Test* CreateTest() override { return new TestClass; }
-};
-
-#if GTEST_OS_WINDOWS
-
-// Predicate-formatters for implementing the HRESULT checking macros
-// {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}
-// We pass a long instead of HRESULT to avoid causing an
-// include dependency for the HRESULT type.
-GTEST_API_ AssertionResult IsHRESULTSuccess(const char* expr,
-                                            long hr);  // NOLINT
-GTEST_API_ AssertionResult IsHRESULTFailure(const char* expr,
-                                            long hr);  // NOLINT
-
-#endif  // GTEST_OS_WINDOWS
-
-// Types of SetUpTestSuite() and TearDownTestSuite() functions.
-using SetUpTestSuiteFunc = void (*)();
-using TearDownTestSuiteFunc = void (*)();
-
-struct CodeLocation {
-  CodeLocation(const std::string& a_file, int a_line)
-      : file(a_file), line(a_line) {}
-
-  std::string file;
-  int line;
-};
-
-//  Helper to identify which setup function for TestCase / TestSuite to call.
-//  Only one function is allowed, either TestCase or TestSute but not both.
-
-// Utility functions to help SuiteApiResolver
-using SetUpTearDownSuiteFuncType = void (*)();
-
-inline SetUpTearDownSuiteFuncType GetNotDefaultOrNull(
-    SetUpTearDownSuiteFuncType a, SetUpTearDownSuiteFuncType def) {
-  return a == def ? nullptr : a;
-}
-
-template <typename T>
-//  Note that SuiteApiResolver inherits from T because
-//  SetUpTestSuite()/TearDownTestSuite() could be protected. Ths way
-//  SuiteApiResolver can access them.
-struct SuiteApiResolver : T {
-  // testing::Test is only forward declared at this point. So we make it a
-  // dependend class for the compiler to be OK with it.
-  using Test =
-      typename std::conditional<sizeof(T) != 0, ::testing::Test, void>::type;
-
-  static SetUpTearDownSuiteFuncType GetSetUpCaseOrSuite(const char* filename,
-                                                        int line_num) {
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-    SetUpTearDownSuiteFuncType test_case_fp =
-        GetNotDefaultOrNull(&T::SetUpTestCase, &Test::SetUpTestCase);
-    SetUpTearDownSuiteFuncType test_suite_fp =
-        GetNotDefaultOrNull(&T::SetUpTestSuite, &Test::SetUpTestSuite);
-
-    GTEST_CHECK_(!test_case_fp || !test_suite_fp)
-        << "Test can not provide both SetUpTestSuite and SetUpTestCase, please "
-           "make sure there is only one present at "
-        << filename << ":" << line_num;
-
-    return test_case_fp != nullptr ? test_case_fp : test_suite_fp;
-#else
-    (void)(filename);
-    (void)(line_num);
-    return &T::SetUpTestSuite;
-#endif
-  }
-
-  static SetUpTearDownSuiteFuncType GetTearDownCaseOrSuite(const char* filename,
-                                                           int line_num) {
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-    SetUpTearDownSuiteFuncType test_case_fp =
-        GetNotDefaultOrNull(&T::TearDownTestCase, &Test::TearDownTestCase);
-    SetUpTearDownSuiteFuncType test_suite_fp =
-        GetNotDefaultOrNull(&T::TearDownTestSuite, &Test::TearDownTestSuite);
-
-    GTEST_CHECK_(!test_case_fp || !test_suite_fp)
-        << "Test can not provide both TearDownTestSuite and TearDownTestCase,"
-           " please make sure there is only one present at"
-        << filename << ":" << line_num;
-
-    return test_case_fp != nullptr ? test_case_fp : test_suite_fp;
-#else
-    (void)(filename);
-    (void)(line_num);
-    return &T::TearDownTestSuite;
-#endif
-  }
-};
-
-// Creates a new TestInfo object and registers it with Google Test;
-// returns the created object.
-//
-// Arguments:
-//
-//   test_suite_name:  name of the test suite
-//   name:             name of the test
-//   type_param:       the name of the test's type parameter, or NULL if
-//                     this is not a typed or a type-parameterized test.
-//   value_param:      text representation of the test's value parameter,
-//                     or NULL if this is not a type-parameterized test.
-//   code_location:    code location where the test is defined
-//   fixture_class_id: ID of the test fixture class
-//   set_up_tc:        pointer to the function that sets up the test suite
-//   tear_down_tc:     pointer to the function that tears down the test suite
-//   factory:          pointer to the factory that creates a test object.
-//                     The newly created TestInfo instance will assume
-//                     ownership of the factory object.
-GTEST_API_ TestInfo* MakeAndRegisterTestInfo(
-    const char* test_suite_name, const char* name, const char* type_param,
-    const char* value_param, CodeLocation code_location,
-    TypeId fixture_class_id, SetUpTestSuiteFunc set_up_tc,
-    TearDownTestSuiteFunc tear_down_tc, TestFactoryBase* factory);
-
-// If *pstr starts with the given prefix, modifies *pstr to be right
-// past the prefix and returns true; otherwise leaves *pstr unchanged
-// and returns false.  None of pstr, *pstr, and prefix can be NULL.
-GTEST_API_ bool SkipPrefix(const char* prefix, const char** pstr);
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-// State of the definition of a type-parameterized test suite.
-class GTEST_API_ TypedTestSuitePState {
- public:
-  TypedTestSuitePState() : registered_(false) {}
-
-  // Adds the given test name to defined_test_names_ and return true
-  // if the test suite hasn't been registered; otherwise aborts the
-  // program.
-  bool AddTestName(const char* file, int line, const char* case_name,
-                   const char* test_name) {
-    if (registered_) {
-      fprintf(stderr,
-              "%s Test %s must be defined before "
-              "REGISTER_TYPED_TEST_SUITE_P(%s, ...).\n",
-              FormatFileLocation(file, line).c_str(), test_name, case_name);
-      fflush(stderr);
-      posix::Abort();
-    }
-    registered_tests_.insert(
-        ::std::make_pair(test_name, CodeLocation(file, line)));
-    return true;
-  }
-
-  bool TestExists(const std::string& test_name) const {
-    return registered_tests_.count(test_name) > 0;
-  }
-
-  const CodeLocation& GetCodeLocation(const std::string& test_name) const {
-    RegisteredTestsMap::const_iterator it = registered_tests_.find(test_name);
-    GTEST_CHECK_(it != registered_tests_.end());
-    return it->second;
-  }
-
-  // Verifies that registered_tests match the test names in
-  // defined_test_names_; returns registered_tests if successful, or
-  // aborts the program otherwise.
-  const char* VerifyRegisteredTestNames(const char* test_suite_name,
-                                        const char* file, int line,
-                                        const char* registered_tests);
-
- private:
-  typedef ::std::map<std::string, CodeLocation> RegisteredTestsMap;
-
-  bool registered_;
-  RegisteredTestsMap registered_tests_;
-};
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-using TypedTestCasePState = TypedTestSuitePState;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// Skips to the first non-space char after the first comma in 'str';
-// returns NULL if no comma is found in 'str'.
-inline const char* SkipComma(const char* str) {
-  const char* comma = strchr(str, ',');
-  if (comma == nullptr) {
-    return nullptr;
-  }
-  while (IsSpace(*(++comma))) {}
-  return comma;
-}
-
-// Returns the prefix of 'str' before the first comma in it; returns
-// the entire string if it contains no comma.
-inline std::string GetPrefixUntilComma(const char* str) {
-  const char* comma = strchr(str, ',');
-  return comma == nullptr ? str : std::string(str, comma);
-}
-
-// Splits a given string on a given delimiter, populating a given
-// vector with the fields.
-void SplitString(const ::std::string& str, char delimiter,
-                 ::std::vector< ::std::string>* dest);
-
-// The default argument to the template below for the case when the user does
-// not provide a name generator.
-struct DefaultNameGenerator {
-  template <typename T>
-  static std::string GetName(int i) {
-    return StreamableToString(i);
-  }
-};
-
-template <typename Provided = DefaultNameGenerator>
-struct NameGeneratorSelector {
-  typedef Provided type;
-};
-
-template <typename NameGenerator>
-void GenerateNamesRecursively(internal::None, std::vector<std::string>*, int) {}
-
-template <typename NameGenerator, typename Types>
-void GenerateNamesRecursively(Types, std::vector<std::string>* result, int i) {
-  result->push_back(NameGenerator::template GetName<typename Types::Head>(i));
-  GenerateNamesRecursively<NameGenerator>(typename Types::Tail(), result,
-                                          i + 1);
-}
-
-template <typename NameGenerator, typename Types>
-std::vector<std::string> GenerateNames() {
-  std::vector<std::string> result;
-  GenerateNamesRecursively<NameGenerator>(Types(), &result, 0);
-  return result;
-}
-
-// TypeParameterizedTest<Fixture, TestSel, Types>::Register()
-// registers a list of type-parameterized tests with Google Test.  The
-// return value is insignificant - we just need to return something
-// such that we can call this function in a namespace scope.
-//
-// Implementation note: The GTEST_TEMPLATE_ macro declares a template
-// template parameter.  It's defined in gtest-type-util.h.
-template <GTEST_TEMPLATE_ Fixture, class TestSel, typename Types>
-class TypeParameterizedTest {
- public:
-  // 'index' is the index of the test in the type list 'Types'
-  // specified in INSTANTIATE_TYPED_TEST_SUITE_P(Prefix, TestSuite,
-  // Types).  Valid values for 'index' are [0, N - 1] where N is the
-  // length of Types.
-  static bool Register(const char* prefix, const CodeLocation& code_location,
-                       const char* case_name, const char* test_names, int index,
-                       const std::vector<std::string>& type_names =
-                           GenerateNames<DefaultNameGenerator, Types>()) {
-    typedef typename Types::Head Type;
-    typedef Fixture<Type> FixtureClass;
-    typedef typename GTEST_BIND_(TestSel, Type) TestClass;
-
-    // First, registers the first type-parameterized test in the type
-    // list.
-    MakeAndRegisterTestInfo(
-        (std::string(prefix) + (prefix[0] == '\0' ? "" : "/") + case_name +
-         "/" + type_names[static_cast<size_t>(index)])
-            .c_str(),
-        StripTrailingSpaces(GetPrefixUntilComma(test_names)).c_str(),
-        GetTypeName<Type>().c_str(),
-        nullptr,  // No value parameter.
-        code_location, GetTypeId<FixtureClass>(),
-        SuiteApiResolver<TestClass>::GetSetUpCaseOrSuite(
-            code_location.file.c_str(), code_location.line),
-        SuiteApiResolver<TestClass>::GetTearDownCaseOrSuite(
-            code_location.file.c_str(), code_location.line),
-        new TestFactoryImpl<TestClass>);
-
-    // Next, recurses (at compile time) with the tail of the type list.
-    return TypeParameterizedTest<Fixture, TestSel,
-                                 typename Types::Tail>::Register(prefix,
-                                                                 code_location,
-                                                                 case_name,
-                                                                 test_names,
-                                                                 index + 1,
-                                                                 type_names);
-  }
-};
-
-// The base case for the compile time recursion.
-template <GTEST_TEMPLATE_ Fixture, class TestSel>
-class TypeParameterizedTest<Fixture, TestSel, internal::None> {
- public:
-  static bool Register(const char* /*prefix*/, const CodeLocation&,
-                       const char* /*case_name*/, const char* /*test_names*/,
-                       int /*index*/,
-                       const std::vector<std::string>& =
-                           std::vector<std::string>() /*type_names*/) {
-    return true;
-  }
-};
-
-GTEST_API_ void RegisterTypeParameterizedTestSuite(const char* test_suite_name,
-                                                   CodeLocation code_location);
-GTEST_API_ void RegisterTypeParameterizedTestSuiteInstantiation(
-    const char* case_name);
-
-// TypeParameterizedTestSuite<Fixture, Tests, Types>::Register()
-// registers *all combinations* of 'Tests' and 'Types' with Google
-// Test.  The return value is insignificant - we just need to return
-// something such that we can call this function in a namespace scope.
-template <GTEST_TEMPLATE_ Fixture, typename Tests, typename Types>
-class TypeParameterizedTestSuite {
- public:
-  static bool Register(const char* prefix, CodeLocation code_location,
-                       const TypedTestSuitePState* state, const char* case_name,
-                       const char* test_names,
-                       const std::vector<std::string>& type_names =
-                           GenerateNames<DefaultNameGenerator, Types>()) {
-    RegisterTypeParameterizedTestSuiteInstantiation(case_name);
-    std::string test_name = StripTrailingSpaces(
-        GetPrefixUntilComma(test_names));
-    if (!state->TestExists(test_name)) {
-      fprintf(stderr, "Failed to get code location for test %s.%s at %s.",
-              case_name, test_name.c_str(),
-              FormatFileLocation(code_location.file.c_str(),
-                                 code_location.line).c_str());
-      fflush(stderr);
-      posix::Abort();
-    }
-    const CodeLocation& test_location = state->GetCodeLocation(test_name);
-
-    typedef typename Tests::Head Head;
-
-    // First, register the first test in 'Test' for each type in 'Types'.
-    TypeParameterizedTest<Fixture, Head, Types>::Register(
-        prefix, test_location, case_name, test_names, 0, type_names);
-
-    // Next, recurses (at compile time) with the tail of the test list.
-    return TypeParameterizedTestSuite<Fixture, typename Tests::Tail,
-                                      Types>::Register(prefix, code_location,
-                                                       state, case_name,
-                                                       SkipComma(test_names),
-                                                       type_names);
-  }
-};
-
-// The base case for the compile time recursion.
-template <GTEST_TEMPLATE_ Fixture, typename Types>
-class TypeParameterizedTestSuite<Fixture, internal::None, Types> {
- public:
-  static bool Register(const char* /*prefix*/, const CodeLocation&,
-                       const TypedTestSuitePState* /*state*/,
-                       const char* /*case_name*/, const char* /*test_names*/,
-                       const std::vector<std::string>& =
-                           std::vector<std::string>() /*type_names*/) {
-    return true;
-  }
-};
-
-// Returns the current OS stack trace as an std::string.
-//
-// The maximum number of stack frames to be included is specified by
-// the gtest_stack_trace_depth flag.  The skip_count parameter
-// specifies the number of top frames to be skipped, which doesn't
-// count against the number of frames to be included.
-//
-// For example, if Foo() calls Bar(), which in turn calls
-// GetCurrentOsStackTraceExceptTop(..., 1), Foo() will be included in
-// the trace but Bar() and GetCurrentOsStackTraceExceptTop() won't.
-GTEST_API_ std::string GetCurrentOsStackTraceExceptTop(
-    UnitTest* unit_test, int skip_count);
-
-// Helpers for suppressing warnings on unreachable code or constant
-// condition.
-
-// Always returns true.
-GTEST_API_ bool AlwaysTrue();
-
-// Always returns false.
-inline bool AlwaysFalse() { return !AlwaysTrue(); }
-
-// Helper for suppressing false warning from Clang on a const char*
-// variable declared in a conditional expression always being NULL in
-// the else branch.
-struct GTEST_API_ ConstCharPtr {
-  ConstCharPtr(const char* str) : value(str) {}
-  operator bool() const { return true; }
-  const char* value;
-};
-
-// Helper for declaring std::string within 'if' statement
-// in pre C++17 build environment.
-struct TrueWithString {
-  TrueWithString() = default;
-  explicit TrueWithString(const char* str) : value(str) {}
-  explicit TrueWithString(const std::string& str) : value(str) {}
-  explicit operator bool() const { return true; }
-  std::string value;
-};
-
-// A simple Linear Congruential Generator for generating random
-// numbers with a uniform distribution.  Unlike rand() and srand(), it
-// doesn't use global state (and therefore can't interfere with user
-// code).  Unlike rand_r(), it's portable.  An LCG isn't very random,
-// but it's good enough for our purposes.
-class GTEST_API_ Random {
- public:
-  static const uint32_t kMaxRange = 1u << 31;
-
-  explicit Random(uint32_t seed) : state_(seed) {}
-
-  void Reseed(uint32_t seed) { state_ = seed; }
-
-  // Generates a random number from [0, range).  Crashes if 'range' is
-  // 0 or greater than kMaxRange.
-  uint32_t Generate(uint32_t range);
-
- private:
-  uint32_t state_;
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Random);
-};
-
-// Turns const U&, U&, const U, and U all into U.
-#define GTEST_REMOVE_REFERENCE_AND_CONST_(T) \
-  typename std::remove_const<typename std::remove_reference<T>::type>::type
-
-// HasDebugStringAndShortDebugString<T>::value is a compile-time bool constant
-// that's true if and only if T has methods DebugString() and ShortDebugString()
-// that return std::string.
-template <typename T>
-class HasDebugStringAndShortDebugString {
- private:
-  template <typename C>
-  static auto CheckDebugString(C*) -> typename std::is_same<
-      std::string, decltype(std::declval<const C>().DebugString())>::type;
-  template <typename>
-  static std::false_type CheckDebugString(...);
-
-  template <typename C>
-  static auto CheckShortDebugString(C*) -> typename std::is_same<
-      std::string, decltype(std::declval<const C>().ShortDebugString())>::type;
-  template <typename>
-  static std::false_type CheckShortDebugString(...);
-
-  using HasDebugStringType = decltype(CheckDebugString<T>(nullptr));
-  using HasShortDebugStringType = decltype(CheckShortDebugString<T>(nullptr));
-
- public:
-  static constexpr bool value =
-      HasDebugStringType::value && HasShortDebugStringType::value;
-};
-
-template <typename T>
-constexpr bool HasDebugStringAndShortDebugString<T>::value;
-
-// When the compiler sees expression IsContainerTest<C>(0), if C is an
-// STL-style container class, the first overload of IsContainerTest
-// will be viable (since both C::iterator* and C::const_iterator* are
-// valid types and NULL can be implicitly converted to them).  It will
-// be picked over the second overload as 'int' is a perfect match for
-// the type of argument 0.  If C::iterator or C::const_iterator is not
-// a valid type, the first overload is not viable, and the second
-// overload will be picked.  Therefore, we can determine whether C is
-// a container class by checking the type of IsContainerTest<C>(0).
-// The value of the expression is insignificant.
-//
-// In C++11 mode we check the existence of a const_iterator and that an
-// iterator is properly implemented for the container.
-//
-// For pre-C++11 that we look for both C::iterator and C::const_iterator.
-// The reason is that C++ injects the name of a class as a member of the
-// class itself (e.g. you can refer to class iterator as either
-// 'iterator' or 'iterator::iterator').  If we look for C::iterator
-// only, for example, we would mistakenly think that a class named
-// iterator is an STL container.
-//
-// Also note that the simpler approach of overloading
-// IsContainerTest(typename C::const_iterator*) and
-// IsContainerTest(...) doesn't work with Visual Age C++ and Sun C++.
-typedef int IsContainer;
-template <class C,
-          class Iterator = decltype(::std::declval<const C&>().begin()),
-          class = decltype(::std::declval<const C&>().end()),
-          class = decltype(++::std::declval<Iterator&>()),
-          class = decltype(*::std::declval<Iterator>()),
-          class = typename C::const_iterator>
-IsContainer IsContainerTest(int /* dummy */) {
-  return 0;
-}
-
-typedef char IsNotContainer;
-template <class C>
-IsNotContainer IsContainerTest(long /* dummy */) { return '\0'; }
-
-// Trait to detect whether a type T is a hash table.
-// The heuristic used is that the type contains an inner type `hasher` and does
-// not contain an inner type `reverse_iterator`.
-// If the container is iterable in reverse, then order might actually matter.
-template <typename T>
-struct IsHashTable {
- private:
-  template <typename U>
-  static char test(typename U::hasher*, typename U::reverse_iterator*);
-  template <typename U>
-  static int test(typename U::hasher*, ...);
-  template <typename U>
-  static char test(...);
-
- public:
-  static const bool value = sizeof(test<T>(nullptr, nullptr)) == sizeof(int);
-};
-
-template <typename T>
-const bool IsHashTable<T>::value;
-
-template <typename C,
-          bool = sizeof(IsContainerTest<C>(0)) == sizeof(IsContainer)>
-struct IsRecursiveContainerImpl;
-
-template <typename C>
-struct IsRecursiveContainerImpl<C, false> : public std::false_type {};
-
-// Since the IsRecursiveContainerImpl depends on the IsContainerTest we need to
-// obey the same inconsistencies as the IsContainerTest, namely check if
-// something is a container is relying on only const_iterator in C++11 and
-// is relying on both const_iterator and iterator otherwise
-template <typename C>
-struct IsRecursiveContainerImpl<C, true> {
-  using value_type = decltype(*std::declval<typename C::const_iterator>());
-  using type =
-      std::is_same<typename std::remove_const<
-                       typename std::remove_reference<value_type>::type>::type,
-                   C>;
-};
-
-// IsRecursiveContainer<Type> is a unary compile-time predicate that
-// evaluates whether C is a recursive container type. A recursive container
-// type is a container type whose value_type is equal to the container type
-// itself. An example for a recursive container type is
-// boost::filesystem::path, whose iterator has a value_type that is equal to
-// boost::filesystem::path.
-template <typename C>
-struct IsRecursiveContainer : public IsRecursiveContainerImpl<C>::type {};
-
-// Utilities for native arrays.
-
-// ArrayEq() compares two k-dimensional native arrays using the
-// elements' operator==, where k can be any integer >= 0.  When k is
-// 0, ArrayEq() degenerates into comparing a single pair of values.
-
-template <typename T, typename U>
-bool ArrayEq(const T* lhs, size_t size, const U* rhs);
-
-// This generic version is used when k is 0.
-template <typename T, typename U>
-inline bool ArrayEq(const T& lhs, const U& rhs) { return lhs == rhs; }
-
-// This overload is used when k >= 1.
-template <typename T, typename U, size_t N>
-inline bool ArrayEq(const T(&lhs)[N], const U(&rhs)[N]) {
-  return internal::ArrayEq(lhs, N, rhs);
-}
-
-// This helper reduces code bloat.  If we instead put its logic inside
-// the previous ArrayEq() function, arrays with different sizes would
-// lead to different copies of the template code.
-template <typename T, typename U>
-bool ArrayEq(const T* lhs, size_t size, const U* rhs) {
-  for (size_t i = 0; i != size; i++) {
-    if (!internal::ArrayEq(lhs[i], rhs[i]))
-      return false;
-  }
-  return true;
-}
-
-// Finds the first element in the iterator range [begin, end) that
-// equals elem.  Element may be a native array type itself.
-template <typename Iter, typename Element>
-Iter ArrayAwareFind(Iter begin, Iter end, const Element& elem) {
-  for (Iter it = begin; it != end; ++it) {
-    if (internal::ArrayEq(*it, elem))
-      return it;
-  }
-  return end;
-}
-
-// CopyArray() copies a k-dimensional native array using the elements'
-// operator=, where k can be any integer >= 0.  When k is 0,
-// CopyArray() degenerates into copying a single value.
-
-template <typename T, typename U>
-void CopyArray(const T* from, size_t size, U* to);
-
-// This generic version is used when k is 0.
-template <typename T, typename U>
-inline void CopyArray(const T& from, U* to) { *to = from; }
-
-// This overload is used when k >= 1.
-template <typename T, typename U, size_t N>
-inline void CopyArray(const T(&from)[N], U(*to)[N]) {
-  internal::CopyArray(from, N, *to);
-}
-
-// This helper reduces code bloat.  If we instead put its logic inside
-// the previous CopyArray() function, arrays with different sizes
-// would lead to different copies of the template code.
-template <typename T, typename U>
-void CopyArray(const T* from, size_t size, U* to) {
-  for (size_t i = 0; i != size; i++) {
-    internal::CopyArray(from[i], to + i);
-  }
-}
-
-// The relation between an NativeArray object (see below) and the
-// native array it represents.
-// We use 2 different structs to allow non-copyable types to be used, as long
-// as RelationToSourceReference() is passed.
-struct RelationToSourceReference {};
-struct RelationToSourceCopy {};
-
-// Adapts a native array to a read-only STL-style container.  Instead
-// of the complete STL container concept, this adaptor only implements
-// members useful for Google Mock's container matchers.  New members
-// should be added as needed.  To simplify the implementation, we only
-// support Element being a raw type (i.e. having no top-level const or
-// reference modifier).  It's the client's responsibility to satisfy
-// this requirement.  Element can be an array type itself (hence
-// multi-dimensional arrays are supported).
-template <typename Element>
-class NativeArray {
- public:
-  // STL-style container typedefs.
-  typedef Element value_type;
-  typedef Element* iterator;
-  typedef const Element* const_iterator;
-
-  // Constructs from a native array. References the source.
-  NativeArray(const Element* array, size_t count, RelationToSourceReference) {
-    InitRef(array, count);
-  }
-
-  // Constructs from a native array. Copies the source.
-  NativeArray(const Element* array, size_t count, RelationToSourceCopy) {
-    InitCopy(array, count);
-  }
-
-  // Copy constructor.
-  NativeArray(const NativeArray& rhs) {
-    (this->*rhs.clone_)(rhs.array_, rhs.size_);
-  }
-
-  ~NativeArray() {
-    if (clone_ != &NativeArray::InitRef)
-      delete[] array_;
-  }
-
-  // STL-style container methods.
-  size_t size() const { return size_; }
-  const_iterator begin() const { return array_; }
-  const_iterator end() const { return array_ + size_; }
-  bool operator==(const NativeArray& rhs) const {
-    return size() == rhs.size() &&
-        ArrayEq(begin(), size(), rhs.begin());
-  }
-
- private:
-  static_assert(!std::is_const<Element>::value, "Type must not be const");
-  static_assert(!std::is_reference<Element>::value,
-                "Type must not be a reference");
-
-  // Initializes this object with a copy of the input.
-  void InitCopy(const Element* array, size_t a_size) {
-    Element* const copy = new Element[a_size];
-    CopyArray(array, a_size, copy);
-    array_ = copy;
-    size_ = a_size;
-    clone_ = &NativeArray::InitCopy;
-  }
-
-  // Initializes this object with a reference of the input.
-  void InitRef(const Element* array, size_t a_size) {
-    array_ = array;
-    size_ = a_size;
-    clone_ = &NativeArray::InitRef;
-  }
-
-  const Element* array_;
-  size_t size_;
-  void (NativeArray::*clone_)(const Element*, size_t);
-};
-
-// Backport of std::index_sequence.
-template <size_t... Is>
-struct IndexSequence {
-  using type = IndexSequence;
-};
-
-// Double the IndexSequence, and one if plus_one is true.
-template <bool plus_one, typename T, size_t sizeofT>
-struct DoubleSequence;
-template <size_t... I, size_t sizeofT>
-struct DoubleSequence<true, IndexSequence<I...>, sizeofT> {
-  using type = IndexSequence<I..., (sizeofT + I)..., 2 * sizeofT>;
-};
-template <size_t... I, size_t sizeofT>
-struct DoubleSequence<false, IndexSequence<I...>, sizeofT> {
-  using type = IndexSequence<I..., (sizeofT + I)...>;
-};
-
-// Backport of std::make_index_sequence.
-// It uses O(ln(N)) instantiation depth.
-template <size_t N>
-struct MakeIndexSequenceImpl
-    : DoubleSequence<N % 2 == 1, typename MakeIndexSequenceImpl<N / 2>::type,
-                     N / 2>::type {};
-
-template <>
-struct MakeIndexSequenceImpl<0> : IndexSequence<> {};
-
-template <size_t N>
-using MakeIndexSequence = typename MakeIndexSequenceImpl<N>::type;
-
-template <typename... T>
-using IndexSequenceFor = typename MakeIndexSequence<sizeof...(T)>::type;
-
-template <size_t>
-struct Ignore {
-  Ignore(...);  // NOLINT
-};
-
-template <typename>
-struct ElemFromListImpl;
-template <size_t... I>
-struct ElemFromListImpl<IndexSequence<I...>> {
-  // We make Ignore a template to solve a problem with MSVC.
-  // A non-template Ignore would work fine with `decltype(Ignore(I))...`, but
-  // MSVC doesn't understand how to deal with that pack expansion.
-  // Use `0 * I` to have a single instantiation of Ignore.
-  template <typename R>
-  static R Apply(Ignore<0 * I>..., R (*)(), ...);
-};
-
-template <size_t N, typename... T>
-struct ElemFromList {
-  using type =
-      decltype(ElemFromListImpl<typename MakeIndexSequence<N>::type>::Apply(
-          static_cast<T (*)()>(nullptr)...));
-};
-
-struct FlatTupleConstructTag {};
-
-template <typename... T>
-class FlatTuple;
-
-template <typename Derived, size_t I>
-struct FlatTupleElemBase;
-
-template <typename... T, size_t I>
-struct FlatTupleElemBase<FlatTuple<T...>, I> {
-  using value_type = typename ElemFromList<I, T...>::type;
-  FlatTupleElemBase() = default;
-  template <typename Arg>
-  explicit FlatTupleElemBase(FlatTupleConstructTag, Arg&& t)
-      : value(std::forward<Arg>(t)) {}
-  value_type value;
-};
-
-template <typename Derived, typename Idx>
-struct FlatTupleBase;
-
-template <size_t... Idx, typename... T>
-struct FlatTupleBase<FlatTuple<T...>, IndexSequence<Idx...>>
-    : FlatTupleElemBase<FlatTuple<T...>, Idx>... {
-  using Indices = IndexSequence<Idx...>;
-  FlatTupleBase() = default;
-  template <typename... Args>
-  explicit FlatTupleBase(FlatTupleConstructTag, Args&&... args)
-      : FlatTupleElemBase<FlatTuple<T...>, Idx>(FlatTupleConstructTag{},
-                                                std::forward<Args>(args))... {}
-
-  template <size_t I>
-  const typename ElemFromList<I, T...>::type& Get() const {
-    return FlatTupleElemBase<FlatTuple<T...>, I>::value;
-  }
-
-  template <size_t I>
-  typename ElemFromList<I, T...>::type& Get() {
-    return FlatTupleElemBase<FlatTuple<T...>, I>::value;
-  }
-
-  template <typename F>
-  auto Apply(F&& f) -> decltype(std::forward<F>(f)(this->Get<Idx>()...)) {
-    return std::forward<F>(f)(Get<Idx>()...);
-  }
-
-  template <typename F>
-  auto Apply(F&& f) const -> decltype(std::forward<F>(f)(this->Get<Idx>()...)) {
-    return std::forward<F>(f)(Get<Idx>()...);
-  }
-};
-
-// Analog to std::tuple but with different tradeoffs.
-// This class minimizes the template instantiation depth, thus allowing more
-// elements than std::tuple would. std::tuple has been seen to require an
-// instantiation depth of more than 10x the number of elements in some
-// implementations.
-// FlatTuple and ElemFromList are not recursive and have a fixed depth
-// regardless of T...
-// MakeIndexSequence, on the other hand, it is recursive but with an
-// instantiation depth of O(ln(N)).
-template <typename... T>
-class FlatTuple
-    : private FlatTupleBase<FlatTuple<T...>,
-                            typename MakeIndexSequence<sizeof...(T)>::type> {
-  using Indices = typename FlatTupleBase<
-      FlatTuple<T...>, typename MakeIndexSequence<sizeof...(T)>::type>::Indices;
-
- public:
-  FlatTuple() = default;
-  template <typename... Args>
-  explicit FlatTuple(FlatTupleConstructTag tag, Args&&... args)
-      : FlatTuple::FlatTupleBase(tag, std::forward<Args>(args)...) {}
-
-  using FlatTuple::FlatTupleBase::Apply;
-  using FlatTuple::FlatTupleBase::Get;
-};
-
-// Utility functions to be called with static_assert to induce deprecation
-// warnings.
-GTEST_INTERNAL_DEPRECATED(
-    "INSTANTIATE_TEST_CASE_P is deprecated, please use "
-    "INSTANTIATE_TEST_SUITE_P")
-constexpr bool InstantiateTestCase_P_IsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "TYPED_TEST_CASE_P is deprecated, please use "
-    "TYPED_TEST_SUITE_P")
-constexpr bool TypedTestCase_P_IsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "TYPED_TEST_CASE is deprecated, please use "
-    "TYPED_TEST_SUITE")
-constexpr bool TypedTestCaseIsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "REGISTER_TYPED_TEST_CASE_P is deprecated, please use "
-    "REGISTER_TYPED_TEST_SUITE_P")
-constexpr bool RegisterTypedTestCase_P_IsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "INSTANTIATE_TYPED_TEST_CASE_P is deprecated, please use "
-    "INSTANTIATE_TYPED_TEST_SUITE_P")
-constexpr bool InstantiateTypedTestCase_P_IsDeprecated() { return true; }
-
-}  // namespace internal
-}  // namespace testing
-
-namespace std {
-// Some standard library implementations use `struct tuple_size` and some use
-// `class tuple_size`. Clang warns about the mismatch.
-// https://reviews.llvm.org/D55466
-#ifdef __clang__
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wmismatched-tags"
-#endif
-template <typename... Ts>
-struct tuple_size<testing::internal::FlatTuple<Ts...>>
-    : std::integral_constant<size_t, sizeof...(Ts)> {};
-#ifdef __clang__
-#pragma clang diagnostic pop
-#endif
-}  // namespace std
-
-#define GTEST_MESSAGE_AT_(file, line, message, result_type) \
-  ::testing::internal::AssertHelper(result_type, file, line, message) \
-    = ::testing::Message()
-
-#define GTEST_MESSAGE_(message, result_type) \
-  GTEST_MESSAGE_AT_(__FILE__, __LINE__, message, result_type)
-
-#define GTEST_FATAL_FAILURE_(message) \
-  return GTEST_MESSAGE_(message, ::testing::TestPartResult::kFatalFailure)
-
-#define GTEST_NONFATAL_FAILURE_(message) \
-  GTEST_MESSAGE_(message, ::testing::TestPartResult::kNonFatalFailure)
-
-#define GTEST_SUCCESS_(message) \
-  GTEST_MESSAGE_(message, ::testing::TestPartResult::kSuccess)
-
-#define GTEST_SKIP_(message) \
-  return GTEST_MESSAGE_(message, ::testing::TestPartResult::kSkip)
-
-// Suppress MSVC warning 4072 (unreachable code) for the code following
-// statement if it returns or throws (or doesn't return or throw in some
-// situations).
-// NOTE: The "else" is important to keep this expansion to prevent a top-level
-// "else" from attaching to our "if".
-#define GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement) \
-  if (::testing::internal::AlwaysTrue()) {                        \
-    statement;                                                    \
-  } else                     /* NOLINT */                         \
-    static_assert(true, "")  // User must have a semicolon after expansion.
-
-#if GTEST_HAS_EXCEPTIONS
-
-namespace testing {
-namespace internal {
-
-class NeverThrown {
- public:
-  const char* what() const noexcept {
-    return "this exception should never be thrown";
-  }
-};
-
-}  // namespace internal
-}  // namespace testing
-
-#if GTEST_HAS_RTTI
-
-#define GTEST_EXCEPTION_TYPE_(e) ::testing::internal::GetTypeName(typeid(e))
-
-#else  // GTEST_HAS_RTTI
-
-#define GTEST_EXCEPTION_TYPE_(e) \
-  std::string { "an std::exception-derived error" }
-
-#endif  // GTEST_HAS_RTTI
-
-#define GTEST_TEST_THROW_CATCH_STD_EXCEPTION_(statement, expected_exception)   \
-  catch (typename std::conditional<                                            \
-         std::is_same<typename std::remove_cv<typename std::remove_reference<  \
-                          expected_exception>::type>::type,                    \
-                      std::exception>::value,                                  \
-         const ::testing::internal::NeverThrown&, const std::exception&>::type \
-             e) {                                                              \
-    gtest_msg.value = "Expected: " #statement                                  \
-                      " throws an exception of type " #expected_exception      \
-                      ".\n  Actual: it throws ";                               \
-    gtest_msg.value += GTEST_EXCEPTION_TYPE_(e);                               \
-    gtest_msg.value += " with description \"";                                 \
-    gtest_msg.value += e.what();                                               \
-    gtest_msg.value += "\".";                                                  \
-    goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);                \
-  }
-
-#else  // GTEST_HAS_EXCEPTIONS
-
-#define GTEST_TEST_THROW_CATCH_STD_EXCEPTION_(statement, expected_exception)
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-#define GTEST_TEST_THROW_(statement, expected_exception, fail)              \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                             \
-  if (::testing::internal::TrueWithString gtest_msg{}) {                    \
-    bool gtest_caught_expected = false;                                     \
-    try {                                                                   \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement);            \
-    } catch (expected_exception const&) {                                   \
-      gtest_caught_expected = true;                                         \
-    }                                                                       \
-    GTEST_TEST_THROW_CATCH_STD_EXCEPTION_(statement, expected_exception)    \
-    catch (...) {                                                           \
-      gtest_msg.value = "Expected: " #statement                             \
-                        " throws an exception of type " #expected_exception \
-                        ".\n  Actual: it throws a different type.";         \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);           \
-    }                                                                       \
-    if (!gtest_caught_expected) {                                           \
-      gtest_msg.value = "Expected: " #statement                             \
-                        " throws an exception of type " #expected_exception \
-                        ".\n  Actual: it throws nothing.";                  \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__);           \
-    }                                                                       \
-  } else /*NOLINT*/                                                         \
-    GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__)                   \
-        : fail(gtest_msg.value.c_str())
-
-#if GTEST_HAS_EXCEPTIONS
-
-#define GTEST_TEST_NO_THROW_CATCH_STD_EXCEPTION_()                \
-  catch (std::exception const& e) {                               \
-    gtest_msg.value = "it throws ";                               \
-    gtest_msg.value += GTEST_EXCEPTION_TYPE_(e);                  \
-    gtest_msg.value += " with description \"";                    \
-    gtest_msg.value += e.what();                                  \
-    gtest_msg.value += "\".";                                     \
-    goto GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__); \
-  }
-
-#else  // GTEST_HAS_EXCEPTIONS
-
-#define GTEST_TEST_NO_THROW_CATCH_STD_EXCEPTION_()
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-#define GTEST_TEST_NO_THROW_(statement, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::TrueWithString gtest_msg{}) { \
-    try { \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    } \
-    GTEST_TEST_NO_THROW_CATCH_STD_EXCEPTION_() \
-    catch (...) { \
-      gtest_msg.value = "it throws."; \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__): \
-      fail(("Expected: " #statement " doesn't throw an exception.\n" \
-            "  Actual: " + gtest_msg.value).c_str())
-
-#define GTEST_TEST_ANY_THROW_(statement, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::AlwaysTrue()) { \
-    bool gtest_caught_any = false; \
-    try { \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    } \
-    catch (...) { \
-      gtest_caught_any = true; \
-    } \
-    if (!gtest_caught_any) { \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testanythrow_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testanythrow_, __LINE__): \
-      fail("Expected: " #statement " throws an exception.\n" \
-           "  Actual: it doesn't.")
-
-
-// Implements Boolean test assertions such as EXPECT_TRUE. expression can be
-// either a boolean expression or an AssertionResult. text is a textual
-// representation of expression as it was passed into the EXPECT_TRUE.
-#define GTEST_TEST_BOOLEAN_(expression, text, actual, expected, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (const ::testing::AssertionResult gtest_ar_ = \
-      ::testing::AssertionResult(expression)) \
-    ; \
-  else \
-    fail(::testing::internal::GetBoolAssertionFailureMessage(\
-        gtest_ar_, text, #actual, #expected).c_str())
-
-#define GTEST_TEST_NO_FATAL_FAILURE_(statement, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::AlwaysTrue()) { \
-    ::testing::internal::HasNewFatalFailureHelper gtest_fatal_failure_checker; \
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    if (gtest_fatal_failure_checker.has_new_fatal_failure()) { \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testnofatal_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testnofatal_, __LINE__): \
-      fail("Expected: " #statement " doesn't generate new fatal " \
-           "failures in the current thread.\n" \
-           "  Actual: it does.")
-
-// Expands to the name of the class that implements the given test.
-#define GTEST_TEST_CLASS_NAME_(test_suite_name, test_name) \
-  test_suite_name##_##test_name##_Test
-
-// Helper macro for defining tests.
-#define GTEST_TEST_(test_suite_name, test_name, parent_class, parent_id)      \
-  static_assert(sizeof(GTEST_STRINGIFY_(test_suite_name)) > 1,                \
-                "test_suite_name must not be empty");                         \
-  static_assert(sizeof(GTEST_STRINGIFY_(test_name)) > 1,                      \
-                "test_name must not be empty");                               \
-  class GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)                    \
-      : public parent_class {                                                 \
-   public:                                                                    \
-    GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() = default;           \
-    ~GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() override = default; \
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name,   \
-                                                           test_name));       \
-    GTEST_DISALLOW_MOVE_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name,   \
-                                                           test_name));       \
-                                                                              \
-   private:                                                                   \
-    void TestBody() override;                                                 \
-    static ::testing::TestInfo* const test_info_ GTEST_ATTRIBUTE_UNUSED_;     \
-  };                                                                          \
-                                                                              \
-  ::testing::TestInfo* const GTEST_TEST_CLASS_NAME_(test_suite_name,          \
-                                                    test_name)::test_info_ =  \
-      ::testing::internal::MakeAndRegisterTestInfo(                           \
-          #test_suite_name, #test_name, nullptr, nullptr,                     \
-          ::testing::internal::CodeLocation(__FILE__, __LINE__), (parent_id), \
-          ::testing::internal::SuiteApiResolver<                              \
-              parent_class>::GetSetUpCaseOrSuite(__FILE__, __LINE__),         \
-          ::testing::internal::SuiteApiResolver<                              \
-              parent_class>::GetTearDownCaseOrSuite(__FILE__, __LINE__),      \
-          new ::testing::internal::TestFactoryImpl<GTEST_TEST_CLASS_NAME_(    \
-              test_suite_name, test_name)>);                                  \
-  void GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::TestBody()
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the public API for death tests.  It is
-// #included by gtest.h so a user doesn't need to include this
-// directly.
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
-
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines internal utilities needed for implementing
-// death tests.  They are subject to change without notice.
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
-
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file implements just enough of the matcher interface to allow
-// EXPECT_DEATH and friends to accept a matcher argument.
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
-
-#include <atomic>
-#include <memory>
-#include <ostream>
-#include <string>
-#include <type_traits>
-
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Test - The Google C++ Testing and Mocking Framework
-//
-// This file implements a universal value printer that can print a
-// value of any type T:
-//
-//   void ::testing::internal::UniversalPrinter<T>::Print(value, ostream_ptr);
-//
-// A user can teach this function how to print a class type T by
-// defining either operator<<() or PrintTo() in the namespace that
-// defines T.  More specifically, the FIRST defined function in the
-// following list will be used (assuming T is defined in namespace
-// foo):
-//
-//   1. foo::PrintTo(const T&, ostream*)
-//   2. operator<<(ostream&, const T&) defined in either foo or the
-//      global namespace.
-//
-// However if T is an STL-style container then it is printed element-wise
-// unless foo::PrintTo(const T&, ostream*) is defined. Note that
-// operator<<() is ignored for container types.
-//
-// If none of the above is defined, it will print the debug string of
-// the value if it is a protocol buffer, or print the raw bytes in the
-// value otherwise.
-//
-// To aid debugging: when T is a reference type, the address of the
-// value is also printed; when T is a (const) char pointer, both the
-// pointer value and the NUL-terminated string it points to are
-// printed.
-//
-// We also provide some convenient wrappers:
-//
-//   // Prints a value to a string.  For a (const or not) char
-//   // pointer, the NUL-terminated string (but not the pointer) is
-//   // printed.
-//   std::string ::testing::PrintToString(const T& value);
-//
-//   // Prints a value tersely: for a reference type, the referenced
-//   // value (but not the address) is printed; for a (const or not) char
-//   // pointer, the NUL-terminated string (but not the pointer) is
-//   // printed.
-//   void ::testing::internal::UniversalTersePrint(const T& value, ostream*);
-//
-//   // Prints value using the type inferred by the compiler.  The difference
-//   // from UniversalTersePrint() is that this function prints both the
-//   // pointer and the NUL-terminated string for a (const or not) char pointer.
-//   void ::testing::internal::UniversalPrint(const T& value, ostream*);
-//
-//   // Prints the fields of a tuple tersely to a string vector, one
-//   // element for each field. Tuple support must be enabled in
-//   // gtest-port.h.
-//   std::vector<string> UniversalTersePrintTupleFieldsToStrings(
-//       const Tuple& value);
-//
-// Known limitation:
-//
-// The print primitives print the elements of an STL-style container
-// using the compiler-inferred type of *iter where iter is a
-// const_iterator of the container.  When const_iterator is an input
-// iterator but not a forward iterator, this inferred type may not
-// match value_type, and the print output may be incorrect.  In
-// practice, this is rarely a problem as for most containers
-// const_iterator is a forward iterator.  We'll fix this if there's an
-// actual need for it.  Note that this fix cannot rely on value_type
-// being defined as many user-defined container types don't have
-// value_type.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
-
-#include <functional>
-#include <memory>
-#include <ostream>  // NOLINT
-#include <sstream>
-#include <string>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-
-#if GTEST_HAS_RTTI
-#include <typeindex>
-#include <typeinfo>
-#endif  // GTEST_HAS_RTTI
-
-namespace testing {
-
-// Definitions in the internal* namespaces are subject to change without notice.
-// DO NOT USE THEM IN USER CODE!
-namespace internal {
-
-template <typename T>
-void UniversalPrint(const T& value, ::std::ostream* os);
-
-// Used to print an STL-style container when the user doesn't define
-// a PrintTo() for it.
-struct ContainerPrinter {
-  template <typename T,
-            typename = typename std::enable_if<
-                (sizeof(IsContainerTest<T>(0)) == sizeof(IsContainer)) &&
-                !IsRecursiveContainer<T>::value>::type>
-  static void PrintValue(const T& container, std::ostream* os) {
-    const size_t kMaxCount = 32;  // The maximum number of elements to print.
-    *os << '{';
-    size_t count = 0;
-    for (auto&& elem : container) {
-      if (count > 0) {
-        *os << ',';
-        if (count == kMaxCount) {  // Enough has been printed.
-          *os << " ...";
-          break;
-        }
-      }
-      *os << ' ';
-      // We cannot call PrintTo(elem, os) here as PrintTo() doesn't
-      // handle `elem` being a native array.
-      internal::UniversalPrint(elem, os);
-      ++count;
-    }
-
-    if (count > 0) {
-      *os << ' ';
-    }
-    *os << '}';
-  }
-};
-
-// Used to print a pointer that is neither a char pointer nor a member
-// pointer, when the user doesn't define PrintTo() for it.  (A member
-// variable pointer or member function pointer doesn't really point to
-// a location in the address space.  Their representation is
-// implementation-defined.  Therefore they will be printed as raw
-// bytes.)
-struct FunctionPointerPrinter {
-  template <typename T, typename = typename std::enable_if<
-                            std::is_function<T>::value>::type>
-  static void PrintValue(T* p, ::std::ostream* os) {
-    if (p == nullptr) {
-      *os << "NULL";
-    } else {
-      // T is a function type, so '*os << p' doesn't do what we want
-      // (it just prints p as bool).  We want to print p as a const
-      // void*.
-      *os << reinterpret_cast<const void*>(p);
-    }
-  }
-};
-
-struct PointerPrinter {
-  template <typename T>
-  static void PrintValue(T* p, ::std::ostream* os) {
-    if (p == nullptr) {
-      *os << "NULL";
-    } else {
-      // T is not a function type.  We just call << to print p,
-      // relying on ADL to pick up user-defined << for their pointer
-      // types, if any.
-      *os << p;
-    }
-  }
-};
-
-namespace internal_stream_operator_without_lexical_name_lookup {
-
-// The presence of an operator<< here will terminate lexical scope lookup
-// straight away (even though it cannot be a match because of its argument
-// types). Thus, the two operator<< calls in StreamPrinter will find only ADL
-// candidates.
-struct LookupBlocker {};
-void operator<<(LookupBlocker, LookupBlocker);
-
-struct StreamPrinter {
-  template <typename T,
-            // Don't accept member pointers here. We'd print them via implicit
-            // conversion to bool, which isn't useful.
-            typename = typename std::enable_if<
-                !std::is_member_pointer<T>::value>::type,
-            // Only accept types for which we can find a streaming operator via
-            // ADL (possibly involving implicit conversions).
-            typename = decltype(std::declval<std::ostream&>()
-                                << std::declval<const T&>())>
-  static void PrintValue(const T& value, ::std::ostream* os) {
-    // Call streaming operator found by ADL, possibly with implicit conversions
-    // of the arguments.
-    *os << value;
-  }
-};
-
-}  // namespace internal_stream_operator_without_lexical_name_lookup
-
-struct ProtobufPrinter {
-  // We print a protobuf using its ShortDebugString() when the string
-  // doesn't exceed this many characters; otherwise we print it using
-  // DebugString() for better readability.
-  static const size_t kProtobufOneLinerMaxLength = 50;
-
-  template <typename T,
-            typename = typename std::enable_if<
-                internal::HasDebugStringAndShortDebugString<T>::value>::type>
-  static void PrintValue(const T& value, ::std::ostream* os) {
-    std::string pretty_str = value.ShortDebugString();
-    if (pretty_str.length() > kProtobufOneLinerMaxLength) {
-      pretty_str = "\n" + value.DebugString();
-    }
-    *os << ("<" + pretty_str + ">");
-  }
-};
-
-struct ConvertibleToIntegerPrinter {
-  // Since T has no << operator or PrintTo() but can be implicitly
-  // converted to BiggestInt, we print it as a BiggestInt.
-  //
-  // Most likely T is an enum type (either named or unnamed), in which
-  // case printing it as an integer is the desired behavior.  In case
-  // T is not an enum, printing it as an integer is the best we can do
-  // given that it has no user-defined printer.
-  static void PrintValue(internal::BiggestInt value, ::std::ostream* os) {
-    *os << value;
-  }
-};
-
-struct ConvertibleToStringViewPrinter {
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  static void PrintValue(internal::StringView value, ::std::ostream* os) {
-    internal::UniversalPrint(value, os);
-  }
-#endif
-};
-
-
-// Prints the given number of bytes in the given object to the given
-// ostream.
-GTEST_API_ void PrintBytesInObjectTo(const unsigned char* obj_bytes,
-                                     size_t count,
-                                     ::std::ostream* os);
-struct RawBytesPrinter {
-  // SFINAE on `sizeof` to make sure we have a complete type.
-  template <typename T, size_t = sizeof(T)>
-  static void PrintValue(const T& value, ::std::ostream* os) {
-    PrintBytesInObjectTo(
-        static_cast<const unsigned char*>(
-            // Load bearing cast to void* to support iOS
-            reinterpret_cast<const void*>(std::addressof(value))),
-        sizeof(value), os);
-  }
-};
-
-struct FallbackPrinter {
-  template <typename T>
-  static void PrintValue(const T&, ::std::ostream* os) {
-    *os << "(incomplete type)";
-  }
-};
-
-// Try every printer in order and return the first one that works.
-template <typename T, typename E, typename Printer, typename... Printers>
-struct FindFirstPrinter : FindFirstPrinter<T, E, Printers...> {};
-
-template <typename T, typename Printer, typename... Printers>
-struct FindFirstPrinter<
-    T, decltype(Printer::PrintValue(std::declval<const T&>(), nullptr)),
-    Printer, Printers...> {
-  using type = Printer;
-};
-
-// Select the best printer in the following order:
-//  - Print containers (they have begin/end/etc).
-//  - Print function pointers.
-//  - Print object pointers.
-//  - Use the stream operator, if available.
-//  - Print protocol buffers.
-//  - Print types convertible to BiggestInt.
-//  - Print types convertible to StringView, if available.
-//  - Fallback to printing the raw bytes of the object.
-template <typename T>
-void PrintWithFallback(const T& value, ::std::ostream* os) {
-  using Printer = typename FindFirstPrinter<
-      T, void, ContainerPrinter, FunctionPointerPrinter, PointerPrinter,
-      internal_stream_operator_without_lexical_name_lookup::StreamPrinter,
-      ProtobufPrinter, ConvertibleToIntegerPrinter,
-      ConvertibleToStringViewPrinter, RawBytesPrinter, FallbackPrinter>::type;
-  Printer::PrintValue(value, os);
-}
-
-// FormatForComparison<ToPrint, OtherOperand>::Format(value) formats a
-// value of type ToPrint that is an operand of a comparison assertion
-// (e.g. ASSERT_EQ).  OtherOperand is the type of the other operand in
-// the comparison, and is used to help determine the best way to
-// format the value.  In particular, when the value is a C string
-// (char pointer) and the other operand is an STL string object, we
-// want to format the C string as a string, since we know it is
-// compared by value with the string object.  If the value is a char
-// pointer but the other operand is not an STL string object, we don't
-// know whether the pointer is supposed to point to a NUL-terminated
-// string, and thus want to print it as a pointer to be safe.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-
-// The default case.
-template <typename ToPrint, typename OtherOperand>
-class FormatForComparison {
- public:
-  static ::std::string Format(const ToPrint& value) {
-    return ::testing::PrintToString(value);
-  }
-};
-
-// Array.
-template <typename ToPrint, size_t N, typename OtherOperand>
-class FormatForComparison<ToPrint[N], OtherOperand> {
- public:
-  static ::std::string Format(const ToPrint* value) {
-    return FormatForComparison<const ToPrint*, OtherOperand>::Format(value);
-  }
-};
-
-// By default, print C string as pointers to be safe, as we don't know
-// whether they actually point to a NUL-terminated string.
-
-#define GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(CharType)                \
-  template <typename OtherOperand>                                      \
-  class FormatForComparison<CharType*, OtherOperand> {                  \
-   public:                                                              \
-    static ::std::string Format(CharType* value) {                      \
-      return ::testing::PrintToString(static_cast<const void*>(value)); \
-    }                                                                   \
-  }
-
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(wchar_t);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const wchar_t);
-#ifdef __cpp_char8_t
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char8_t);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char8_t);
-#endif
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char16_t);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char16_t);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char32_t);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char32_t);
-
-#undef GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_
-
-// If a C string is compared with an STL string object, we know it's meant
-// to point to a NUL-terminated string, and thus can print it as a string.
-
-#define GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(CharType, OtherStringType) \
-  template <>                                                           \
-  class FormatForComparison<CharType*, OtherStringType> {               \
-   public:                                                              \
-    static ::std::string Format(CharType* value) {                      \
-      return ::testing::PrintToString(value);                           \
-    }                                                                   \
-  }
-
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char, ::std::string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char, ::std::string);
-#ifdef __cpp_char8_t
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char8_t, ::std::u8string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char8_t, ::std::u8string);
-#endif
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char16_t, ::std::u16string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char16_t, ::std::u16string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char32_t, ::std::u32string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char32_t, ::std::u32string);
-
-#if GTEST_HAS_STD_WSTRING
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(wchar_t, ::std::wstring);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const wchar_t, ::std::wstring);
-#endif
-
-#undef GTEST_IMPL_FORMAT_C_STRING_AS_STRING_
-
-// Formats a comparison assertion (e.g. ASSERT_EQ, EXPECT_LT, and etc)
-// operand to be used in a failure message.  The type (but not value)
-// of the other operand may affect the format.  This allows us to
-// print a char* as a raw pointer when it is compared against another
-// char* or void*, and print it as a C string when it is compared
-// against an std::string object, for example.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-template <typename T1, typename T2>
-std::string FormatForComparisonFailureMessage(
-    const T1& value, const T2& /* other_operand */) {
-  return FormatForComparison<T1, T2>::Format(value);
-}
-
-// UniversalPrinter<T>::Print(value, ostream_ptr) prints the given
-// value to the given ostream.  The caller must ensure that
-// 'ostream_ptr' is not NULL, or the behavior is undefined.
-//
-// We define UniversalPrinter as a class template (as opposed to a
-// function template), as we need to partially specialize it for
-// reference types, which cannot be done with function templates.
-template <typename T>
-class UniversalPrinter;
-
-// Prints the given value using the << operator if it has one;
-// otherwise prints the bytes in it.  This is what
-// UniversalPrinter<T>::Print() does when PrintTo() is not specialized
-// or overloaded for type T.
-//
-// A user can override this behavior for a class type Foo by defining
-// an overload of PrintTo() in the namespace where Foo is defined.  We
-// give the user this option as sometimes defining a << operator for
-// Foo is not desirable (e.g. the coding style may prevent doing it,
-// or there is already a << operator but it doesn't do what the user
-// wants).
-template <typename T>
-void PrintTo(const T& value, ::std::ostream* os) {
-  internal::PrintWithFallback(value, os);
-}
-
-// The following list of PrintTo() overloads tells
-// UniversalPrinter<T>::Print() how to print standard types (built-in
-// types, strings, plain arrays, and pointers).
-
-// Overloads for various char types.
-GTEST_API_ void PrintTo(unsigned char c, ::std::ostream* os);
-GTEST_API_ void PrintTo(signed char c, ::std::ostream* os);
-inline void PrintTo(char c, ::std::ostream* os) {
-  // When printing a plain char, we always treat it as unsigned.  This
-  // way, the output won't be affected by whether the compiler thinks
-  // char is signed or not.
-  PrintTo(static_cast<unsigned char>(c), os);
-}
-
-// Overloads for other simple built-in types.
-inline void PrintTo(bool x, ::std::ostream* os) {
-  *os << (x ? "true" : "false");
-}
-
-// Overload for wchar_t type.
-// Prints a wchar_t as a symbol if it is printable or as its internal
-// code otherwise and also as its decimal code (except for L'\0').
-// The L'\0' char is printed as "L'\\0'". The decimal code is printed
-// as signed integer when wchar_t is implemented by the compiler
-// as a signed type and is printed as an unsigned integer when wchar_t
-// is implemented as an unsigned type.
-GTEST_API_ void PrintTo(wchar_t wc, ::std::ostream* os);
-
-GTEST_API_ void PrintTo(char32_t c, ::std::ostream* os);
-inline void PrintTo(char16_t c, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<char32_t>(c), os);
-}
-#ifdef __cpp_char8_t
-inline void PrintTo(char8_t c, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<char32_t>(c), os);
-}
-#endif
-
-// Overloads for C strings.
-GTEST_API_ void PrintTo(const char* s, ::std::ostream* os);
-inline void PrintTo(char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const char*>(s), os);
-}
-
-// signed/unsigned char is often used for representing binary data, so
-// we print pointers to it as void* to be safe.
-inline void PrintTo(const signed char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-inline void PrintTo(signed char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-inline void PrintTo(const unsigned char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-inline void PrintTo(unsigned char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-#ifdef __cpp_char8_t
-// Overloads for u8 strings.
-void PrintTo(const char8_t* s, ::std::ostream* os);
-inline void PrintTo(char8_t* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const char8_t*>(s), os);
-}
-#endif
-// Overloads for u16 strings.
-void PrintTo(const char16_t* s, ::std::ostream* os);
-inline void PrintTo(char16_t* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const char16_t*>(s), os);
-}
-// Overloads for u32 strings.
-void PrintTo(const char32_t* s, ::std::ostream* os);
-inline void PrintTo(char32_t* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const char32_t*>(s), os);
-}
-
-// MSVC can be configured to define wchar_t as a typedef of unsigned
-// short.  It defines _NATIVE_WCHAR_T_DEFINED when wchar_t is a native
-// type.  When wchar_t is a typedef, defining an overload for const
-// wchar_t* would cause unsigned short* be printed as a wide string,
-// possibly causing invalid memory accesses.
-#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
-// Overloads for wide C strings
-GTEST_API_ void PrintTo(const wchar_t* s, ::std::ostream* os);
-inline void PrintTo(wchar_t* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const wchar_t*>(s), os);
-}
-#endif
-
-// Overload for C arrays.  Multi-dimensional arrays are printed
-// properly.
-
-// Prints the given number of elements in an array, without printing
-// the curly braces.
-template <typename T>
-void PrintRawArrayTo(const T a[], size_t count, ::std::ostream* os) {
-  UniversalPrint(a[0], os);
-  for (size_t i = 1; i != count; i++) {
-    *os << ", ";
-    UniversalPrint(a[i], os);
-  }
-}
-
-// Overloads for ::std::string.
-GTEST_API_ void PrintStringTo(const ::std::string&s, ::std::ostream* os);
-inline void PrintTo(const ::std::string& s, ::std::ostream* os) {
-  PrintStringTo(s, os);
-}
-
-// Overloads for ::std::u8string
-#ifdef __cpp_char8_t
-GTEST_API_ void PrintU8StringTo(const ::std::u8string& s, ::std::ostream* os);
-inline void PrintTo(const ::std::u8string& s, ::std::ostream* os) {
-  PrintU8StringTo(s, os);
-}
-#endif
-
-// Overloads for ::std::u16string
-GTEST_API_ void PrintU16StringTo(const ::std::u16string& s, ::std::ostream* os);
-inline void PrintTo(const ::std::u16string& s, ::std::ostream* os) {
-  PrintU16StringTo(s, os);
-}
-
-// Overloads for ::std::u32string
-GTEST_API_ void PrintU32StringTo(const ::std::u32string& s, ::std::ostream* os);
-inline void PrintTo(const ::std::u32string& s, ::std::ostream* os) {
-  PrintU32StringTo(s, os);
-}
-
-// Overloads for ::std::wstring.
-#if GTEST_HAS_STD_WSTRING
-GTEST_API_ void PrintWideStringTo(const ::std::wstring&s, ::std::ostream* os);
-inline void PrintTo(const ::std::wstring& s, ::std::ostream* os) {
-  PrintWideStringTo(s, os);
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-// Overload for internal::StringView.
-inline void PrintTo(internal::StringView sp, ::std::ostream* os) {
-  PrintTo(::std::string(sp), os);
-}
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-inline void PrintTo(std::nullptr_t, ::std::ostream* os) { *os << "(nullptr)"; }
-
-template <typename T>
-void PrintTo(std::reference_wrapper<T> ref, ::std::ostream* os) {
-  UniversalPrinter<T&>::Print(ref.get(), os);
-}
-
-inline const void* VoidifyPointer(const void* p) { return p; }
-inline const void* VoidifyPointer(volatile const void* p) {
-  return const_cast<const void*>(p);
-}
-
-template <typename T, typename Ptr>
-void PrintSmartPointer(const Ptr& ptr, std::ostream* os, char) {
-  if (ptr == nullptr) {
-    *os << "(nullptr)";
-  } else {
-    // We can't print the value. Just print the pointer..
-    *os << "(" << (VoidifyPointer)(ptr.get()) << ")";
-  }
-}
-template <typename T, typename Ptr,
-          typename = typename std::enable_if<!std::is_void<T>::value &&
-                                             !std::is_array<T>::value>::type>
-void PrintSmartPointer(const Ptr& ptr, std::ostream* os, int) {
-  if (ptr == nullptr) {
-    *os << "(nullptr)";
-  } else {
-    *os << "(ptr = " << (VoidifyPointer)(ptr.get()) << ", value = ";
-    UniversalPrinter<T>::Print(*ptr, os);
-    *os << ")";
-  }
-}
-
-template <typename T, typename D>
-void PrintTo(const std::unique_ptr<T, D>& ptr, std::ostream* os) {
-  (PrintSmartPointer<T>)(ptr, os, 0);
-}
-
-template <typename T>
-void PrintTo(const std::shared_ptr<T>& ptr, std::ostream* os) {
-  (PrintSmartPointer<T>)(ptr, os, 0);
-}
-
-// Helper function for printing a tuple.  T must be instantiated with
-// a tuple type.
-template <typename T>
-void PrintTupleTo(const T&, std::integral_constant<size_t, 0>,
-                  ::std::ostream*) {}
-
-template <typename T, size_t I>
-void PrintTupleTo(const T& t, std::integral_constant<size_t, I>,
-                  ::std::ostream* os) {
-  PrintTupleTo(t, std::integral_constant<size_t, I - 1>(), os);
-  GTEST_INTENTIONAL_CONST_COND_PUSH_()
-  if (I > 1) {
-    GTEST_INTENTIONAL_CONST_COND_POP_()
-    *os << ", ";
-  }
-  UniversalPrinter<typename std::tuple_element<I - 1, T>::type>::Print(
-      std::get<I - 1>(t), os);
-}
-
-template <typename... Types>
-void PrintTo(const ::std::tuple<Types...>& t, ::std::ostream* os) {
-  *os << "(";
-  PrintTupleTo(t, std::integral_constant<size_t, sizeof...(Types)>(), os);
-  *os << ")";
-}
-
-// Overload for std::pair.
-template <typename T1, typename T2>
-void PrintTo(const ::std::pair<T1, T2>& value, ::std::ostream* os) {
-  *os << '(';
-  // We cannot use UniversalPrint(value.first, os) here, as T1 may be
-  // a reference type.  The same for printing value.second.
-  UniversalPrinter<T1>::Print(value.first, os);
-  *os << ", ";
-  UniversalPrinter<T2>::Print(value.second, os);
-  *os << ')';
-}
-
-#if GTEST_HAS_RTTI
-inline void PrintTo(const ::std::type_info& value, ::std::ostream* os) {
-  internal::PrintTo<::std::type_info>(value, os);
-  *os << " (\"" << value.name() << "\")";
-}
-
-inline void PrintTo(const ::std::type_index& value, ::std::ostream* os) {
-  internal::PrintTo<::std::type_index>(value, os);
-  *os << " (\"" << value.name() << "\")";
-}
-#endif  // GTEST_HAS_RTTI
-
-// Implements printing a non-reference type T by letting the compiler
-// pick the right overload of PrintTo() for T.
-template <typename T>
-class UniversalPrinter {
- public:
-  // MSVC warns about adding const to a function type, so we want to
-  // disable the warning.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4180)
-
-  // Note: we deliberately don't call this PrintTo(), as that name
-  // conflicts with ::testing::internal::PrintTo in the body of the
-  // function.
-  static void Print(const T& value, ::std::ostream* os) {
-    // By default, ::testing::internal::PrintTo() is used for printing
-    // the value.
-    //
-    // Thanks to Koenig look-up, if T is a class and has its own
-    // PrintTo() function defined in its namespace, that function will
-    // be visible here.  Since it is more specific than the generic ones
-    // in ::testing::internal, it will be picked by the compiler in the
-    // following statement - exactly what we want.
-    PrintTo(value, os);
-  }
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-};
-
-// Remove any const-qualifiers before passing a type to UniversalPrinter.
-template <typename T>
-class UniversalPrinter<const T> : public UniversalPrinter<T> {};
-
-#if GTEST_INTERNAL_HAS_ANY
-
-// Printer for std::any / absl::any
-
-template <>
-class UniversalPrinter<Any> {
- public:
-  static void Print(const Any& value, ::std::ostream* os) {
-    if (value.has_value()) {
-      *os << "value of type " << GetTypeName(value);
-    } else {
-      *os << "no value";
-    }
-  }
-
- private:
-  static std::string GetTypeName(const Any& value) {
-#if GTEST_HAS_RTTI
-    return internal::GetTypeName(value.type());
-#else
-    static_cast<void>(value);  // possibly unused
-    return "<unknown_type>";
-#endif  // GTEST_HAS_RTTI
-  }
-};
-
-#endif  // GTEST_INTERNAL_HAS_ANY
-
-#if GTEST_INTERNAL_HAS_OPTIONAL
-
-// Printer for std::optional / absl::optional
-
-template <typename T>
-class UniversalPrinter<Optional<T>> {
- public:
-  static void Print(const Optional<T>& value, ::std::ostream* os) {
-    *os << '(';
-    if (!value) {
-      *os << "nullopt";
-    } else {
-      UniversalPrint(*value, os);
-    }
-    *os << ')';
-  }
-};
-
-#endif  // GTEST_INTERNAL_HAS_OPTIONAL
-
-#if GTEST_INTERNAL_HAS_VARIANT
-
-// Printer for std::variant / absl::variant
-
-template <typename... T>
-class UniversalPrinter<Variant<T...>> {
- public:
-  static void Print(const Variant<T...>& value, ::std::ostream* os) {
-    *os << '(';
-#if GTEST_HAS_ABSL
-    absl::visit(Visitor{os, value.index()}, value);
-#else
-    std::visit(Visitor{os, value.index()}, value);
-#endif  // GTEST_HAS_ABSL
-    *os << ')';
-  }
-
- private:
-  struct Visitor {
-    template <typename U>
-    void operator()(const U& u) const {
-      *os << "'" << GetTypeName<U>() << "(index = " << index
-          << ")' with value ";
-      UniversalPrint(u, os);
-    }
-    ::std::ostream* os;
-    std::size_t index;
-  };
-};
-
-#endif  // GTEST_INTERNAL_HAS_VARIANT
-
-// UniversalPrintArray(begin, len, os) prints an array of 'len'
-// elements, starting at address 'begin'.
-template <typename T>
-void UniversalPrintArray(const T* begin, size_t len, ::std::ostream* os) {
-  if (len == 0) {
-    *os << "{}";
-  } else {
-    *os << "{ ";
-    const size_t kThreshold = 18;
-    const size_t kChunkSize = 8;
-    // If the array has more than kThreshold elements, we'll have to
-    // omit some details by printing only the first and the last
-    // kChunkSize elements.
-    if (len <= kThreshold) {
-      PrintRawArrayTo(begin, len, os);
-    } else {
-      PrintRawArrayTo(begin, kChunkSize, os);
-      *os << ", ..., ";
-      PrintRawArrayTo(begin + len - kChunkSize, kChunkSize, os);
-    }
-    *os << " }";
-  }
-}
-// This overload prints a (const) char array compactly.
-GTEST_API_ void UniversalPrintArray(
-    const char* begin, size_t len, ::std::ostream* os);
-
-#ifdef __cpp_char8_t
-// This overload prints a (const) char8_t array compactly.
-GTEST_API_ void UniversalPrintArray(const char8_t* begin, size_t len,
-                                    ::std::ostream* os);
-#endif
-
-// This overload prints a (const) char16_t array compactly.
-GTEST_API_ void UniversalPrintArray(const char16_t* begin, size_t len,
-                                    ::std::ostream* os);
-
-// This overload prints a (const) char32_t array compactly.
-GTEST_API_ void UniversalPrintArray(const char32_t* begin, size_t len,
-                                    ::std::ostream* os);
-
-// This overload prints a (const) wchar_t array compactly.
-GTEST_API_ void UniversalPrintArray(
-    const wchar_t* begin, size_t len, ::std::ostream* os);
-
-// Implements printing an array type T[N].
-template <typename T, size_t N>
-class UniversalPrinter<T[N]> {
- public:
-  // Prints the given array, omitting some elements when there are too
-  // many.
-  static void Print(const T (&a)[N], ::std::ostream* os) {
-    UniversalPrintArray(a, N, os);
-  }
-};
-
-// Implements printing a reference type T&.
-template <typename T>
-class UniversalPrinter<T&> {
- public:
-  // MSVC warns about adding const to a function type, so we want to
-  // disable the warning.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4180)
-
-  static void Print(const T& value, ::std::ostream* os) {
-    // Prints the address of the value.  We use reinterpret_cast here
-    // as static_cast doesn't compile when T is a function type.
-    *os << "@" << reinterpret_cast<const void*>(&value) << " ";
-
-    // Then prints the value itself.
-    UniversalPrint(value, os);
-  }
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-};
-
-// Prints a value tersely: for a reference type, the referenced value
-// (but not the address) is printed; for a (const) char pointer, the
-// NUL-terminated string (but not the pointer) is printed.
-
-template <typename T>
-class UniversalTersePrinter {
- public:
-  static void Print(const T& value, ::std::ostream* os) {
-    UniversalPrint(value, os);
-  }
-};
-template <typename T>
-class UniversalTersePrinter<T&> {
- public:
-  static void Print(const T& value, ::std::ostream* os) {
-    UniversalPrint(value, os);
-  }
-};
-template <typename T, size_t N>
-class UniversalTersePrinter<T[N]> {
- public:
-  static void Print(const T (&value)[N], ::std::ostream* os) {
-    UniversalPrinter<T[N]>::Print(value, os);
-  }
-};
-template <>
-class UniversalTersePrinter<const char*> {
- public:
-  static void Print(const char* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(std::string(str), os);
-    }
-  }
-};
-template <>
-class UniversalTersePrinter<char*> : public UniversalTersePrinter<const char*> {
-};
-
-#ifdef __cpp_char8_t
-template <>
-class UniversalTersePrinter<const char8_t*> {
- public:
-  static void Print(const char8_t* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(::std::u8string(str), os);
-    }
-  }
-};
-template <>
-class UniversalTersePrinter<char8_t*>
-    : public UniversalTersePrinter<const char8_t*> {};
-#endif
-
-template <>
-class UniversalTersePrinter<const char16_t*> {
- public:
-  static void Print(const char16_t* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(::std::u16string(str), os);
-    }
-  }
-};
-template <>
-class UniversalTersePrinter<char16_t*>
-    : public UniversalTersePrinter<const char16_t*> {};
-
-template <>
-class UniversalTersePrinter<const char32_t*> {
- public:
-  static void Print(const char32_t* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(::std::u32string(str), os);
-    }
-  }
-};
-template <>
-class UniversalTersePrinter<char32_t*>
-    : public UniversalTersePrinter<const char32_t*> {};
-
-#if GTEST_HAS_STD_WSTRING
-template <>
-class UniversalTersePrinter<const wchar_t*> {
- public:
-  static void Print(const wchar_t* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(::std::wstring(str), os);
-    }
-  }
-};
-#endif
-
-template <>
-class UniversalTersePrinter<wchar_t*> {
- public:
-  static void Print(wchar_t* str, ::std::ostream* os) {
-    UniversalTersePrinter<const wchar_t*>::Print(str, os);
-  }
-};
-
-template <typename T>
-void UniversalTersePrint(const T& value, ::std::ostream* os) {
-  UniversalTersePrinter<T>::Print(value, os);
-}
-
-// Prints a value using the type inferred by the compiler.  The
-// difference between this and UniversalTersePrint() is that for a
-// (const) char pointer, this prints both the pointer and the
-// NUL-terminated string.
-template <typename T>
-void UniversalPrint(const T& value, ::std::ostream* os) {
-  // A workarond for the bug in VC++ 7.1 that prevents us from instantiating
-  // UniversalPrinter with T directly.
-  typedef T T1;
-  UniversalPrinter<T1>::Print(value, os);
-}
-
-typedef ::std::vector< ::std::string> Strings;
-
-  // Tersely prints the first N fields of a tuple to a string vector,
-  // one element for each field.
-template <typename Tuple>
-void TersePrintPrefixToStrings(const Tuple&, std::integral_constant<size_t, 0>,
-                               Strings*) {}
-template <typename Tuple, size_t I>
-void TersePrintPrefixToStrings(const Tuple& t,
-                               std::integral_constant<size_t, I>,
-                               Strings* strings) {
-  TersePrintPrefixToStrings(t, std::integral_constant<size_t, I - 1>(),
-                            strings);
-  ::std::stringstream ss;
-  UniversalTersePrint(std::get<I - 1>(t), &ss);
-  strings->push_back(ss.str());
-}
-
-// Prints the fields of a tuple tersely to a string vector, one
-// element for each field.  See the comment before
-// UniversalTersePrint() for how we define "tersely".
-template <typename Tuple>
-Strings UniversalTersePrintTupleFieldsToStrings(const Tuple& value) {
-  Strings result;
-  TersePrintPrefixToStrings(
-      value, std::integral_constant<size_t, std::tuple_size<Tuple>::value>(),
-      &result);
-  return result;
-}
-
-}  // namespace internal
-
-template <typename T>
-::std::string PrintToString(const T& value) {
-  ::std::stringstream ss;
-  internal::UniversalTersePrinter<T>::Print(value, &ss);
-  return ss.str();
-}
-
-}  // namespace testing
-
-// Include any custom printer added by the local installation.
-// We must include this header at the end to make sure it can use the
-// declarations from this file.
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// This file provides an injection point for custom printers in a local
-// installation of gTest.
-// It will be included from gtest-printers.h and the overrides in this file
-// will be visible to everyone.
-//
-// Injection point for custom user configurations. See README for details
-//
-// ** Custom implementation starts here **
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
-
-// MSVC warning C5046 is new as of VS2017 version 15.8.
-#if defined(_MSC_VER) && _MSC_VER >= 1915
-#define GTEST_MAYBE_5046_ 5046
-#else
-#define GTEST_MAYBE_5046_
-#endif
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(
-    4251 GTEST_MAYBE_5046_ /* class A needs to have dll-interface to be used by
-                              clients of class B */
-    /* Symbol involving type with internal linkage not defined */)
-
-namespace testing {
-
-// To implement a matcher Foo for type T, define:
-//   1. a class FooMatcherMatcher that implements the matcher interface:
-//     using is_gtest_matcher = void;
-//     bool MatchAndExplain(const T&, std::ostream*);
-//       (MatchResultListener* can also be used instead of std::ostream*)
-//     void DescribeTo(std::ostream*);
-//     void DescribeNegationTo(std::ostream*);
-//
-//   2. a factory function that creates a Matcher<T> object from a
-//      FooMatcherMatcher.
-
-class MatchResultListener {
- public:
-  // Creates a listener object with the given underlying ostream.  The
-  // listener does not own the ostream, and does not dereference it
-  // in the constructor or destructor.
-  explicit MatchResultListener(::std::ostream* os) : stream_(os) {}
-  virtual ~MatchResultListener() = 0;  // Makes this class abstract.
-
-  // Streams x to the underlying ostream; does nothing if the ostream
-  // is NULL.
-  template <typename T>
-  MatchResultListener& operator<<(const T& x) {
-    if (stream_ != nullptr) *stream_ << x;
-    return *this;
-  }
-
-  // Returns the underlying ostream.
-  ::std::ostream* stream() { return stream_; }
-
-  // Returns true if and only if the listener is interested in an explanation
-  // of the match result.  A matcher's MatchAndExplain() method can use
-  // this information to avoid generating the explanation when no one
-  // intends to hear it.
-  bool IsInterested() const { return stream_ != nullptr; }
-
- private:
-  ::std::ostream* const stream_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MatchResultListener);
-};
-
-inline MatchResultListener::~MatchResultListener() {
-}
-
-// An instance of a subclass of this knows how to describe itself as a
-// matcher.
-class MatcherDescriberInterface {
- public:
-  virtual ~MatcherDescriberInterface() {}
-
-  // Describes this matcher to an ostream.  The function should print
-  // a verb phrase that describes the property a value matching this
-  // matcher should have.  The subject of the verb phrase is the value
-  // being matched.  For example, the DescribeTo() method of the Gt(7)
-  // matcher prints "is greater than 7".
-  virtual void DescribeTo(::std::ostream* os) const = 0;
-
-  // Describes the negation of this matcher to an ostream.  For
-  // example, if the description of this matcher is "is greater than
-  // 7", the negated description could be "is not greater than 7".
-  // You are not required to override this when implementing
-  // MatcherInterface, but it is highly advised so that your matcher
-  // can produce good error messages.
-  virtual void DescribeNegationTo(::std::ostream* os) const {
-    *os << "not (";
-    DescribeTo(os);
-    *os << ")";
-  }
-};
-
-// The implementation of a matcher.
-template <typename T>
-class MatcherInterface : public MatcherDescriberInterface {
- public:
-  // Returns true if and only if the matcher matches x; also explains the
-  // match result to 'listener' if necessary (see the next paragraph), in
-  // the form of a non-restrictive relative clause ("which ...",
-  // "whose ...", etc) that describes x.  For example, the
-  // MatchAndExplain() method of the Pointee(...) matcher should
-  // generate an explanation like "which points to ...".
-  //
-  // Implementations of MatchAndExplain() should add an explanation of
-  // the match result *if and only if* they can provide additional
-  // information that's not already present (or not obvious) in the
-  // print-out of x and the matcher's description.  Whether the match
-  // succeeds is not a factor in deciding whether an explanation is
-  // needed, as sometimes the caller needs to print a failure message
-  // when the match succeeds (e.g. when the matcher is used inside
-  // Not()).
-  //
-  // For example, a "has at least 10 elements" matcher should explain
-  // what the actual element count is, regardless of the match result,
-  // as it is useful information to the reader; on the other hand, an
-  // "is empty" matcher probably only needs to explain what the actual
-  // size is when the match fails, as it's redundant to say that the
-  // size is 0 when the value is already known to be empty.
-  //
-  // You should override this method when defining a new matcher.
-  //
-  // It's the responsibility of the caller (Google Test) to guarantee
-  // that 'listener' is not NULL.  This helps to simplify a matcher's
-  // implementation when it doesn't care about the performance, as it
-  // can talk to 'listener' without checking its validity first.
-  // However, in order to implement dummy listeners efficiently,
-  // listener->stream() may be NULL.
-  virtual bool MatchAndExplain(T x, MatchResultListener* listener) const = 0;
-
-  // Inherits these methods from MatcherDescriberInterface:
-  //   virtual void DescribeTo(::std::ostream* os) const = 0;
-  //   virtual void DescribeNegationTo(::std::ostream* os) const;
-};
-
-namespace internal {
-
-struct AnyEq {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a == b; }
-};
-struct AnyNe {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a != b; }
-};
-struct AnyLt {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a < b; }
-};
-struct AnyGt {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a > b; }
-};
-struct AnyLe {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a <= b; }
-};
-struct AnyGe {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a >= b; }
-};
-
-// A match result listener that ignores the explanation.
-class DummyMatchResultListener : public MatchResultListener {
- public:
-  DummyMatchResultListener() : MatchResultListener(nullptr) {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DummyMatchResultListener);
-};
-
-// A match result listener that forwards the explanation to a given
-// ostream.  The difference between this and MatchResultListener is
-// that the former is concrete.
-class StreamMatchResultListener : public MatchResultListener {
- public:
-  explicit StreamMatchResultListener(::std::ostream* os)
-      : MatchResultListener(os) {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(StreamMatchResultListener);
-};
-
-struct SharedPayloadBase {
-  std::atomic<int> ref{1};
-  void Ref() { ref.fetch_add(1, std::memory_order_relaxed); }
-  bool Unref() { return ref.fetch_sub(1, std::memory_order_acq_rel) == 1; }
-};
-
-template <typename T>
-struct SharedPayload : SharedPayloadBase {
-  explicit SharedPayload(const T& v) : value(v) {}
-  explicit SharedPayload(T&& v) : value(std::move(v)) {}
-
-  static void Destroy(SharedPayloadBase* shared) {
-    delete static_cast<SharedPayload*>(shared);
-  }
-
-  T value;
-};
-
-template <typename T>
-using is_trivially_copy_constructible =
-#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ < 5
-    std::has_trivial_copy_constructor<T>;
-#else
-    std::is_trivially_copy_constructible<T>;
-#endif
-
-// An internal class for implementing Matcher<T>, which will derive
-// from it.  We put functionalities common to all Matcher<T>
-// specializations here to avoid code duplication.
-template <typename T>
-class MatcherBase : private MatcherDescriberInterface {
- public:
-  // Returns true if and only if the matcher matches x; also explains the
-  // match result to 'listener'.
-  bool MatchAndExplain(const T& x, MatchResultListener* listener) const {
-    GTEST_CHECK_(vtable_ != nullptr);
-    return vtable_->match_and_explain(*this, x, listener);
-  }
-
-  // Returns true if and only if this matcher matches x.
-  bool Matches(const T& x) const {
-    DummyMatchResultListener dummy;
-    return MatchAndExplain(x, &dummy);
-  }
-
-  // Describes this matcher to an ostream.
-  void DescribeTo(::std::ostream* os) const final {
-    GTEST_CHECK_(vtable_ != nullptr);
-    vtable_->describe(*this, os, false);
-  }
-
-  // Describes the negation of this matcher to an ostream.
-  void DescribeNegationTo(::std::ostream* os) const final {
-    GTEST_CHECK_(vtable_ != nullptr);
-    vtable_->describe(*this, os, true);
-  }
-
-  // Explains why x matches, or doesn't match, the matcher.
-  void ExplainMatchResultTo(const T& x, ::std::ostream* os) const {
-    StreamMatchResultListener listener(os);
-    MatchAndExplain(x, &listener);
-  }
-
-  // Returns the describer for this matcher object; retains ownership
-  // of the describer, which is only guaranteed to be alive when
-  // this matcher object is alive.
-  const MatcherDescriberInterface* GetDescriber() const {
-    if (vtable_ == nullptr) return nullptr;
-    return vtable_->get_describer(*this);
-  }
-
- protected:
-  MatcherBase() : vtable_(nullptr) {}
-
-  // Constructs a matcher from its implementation.
-  template <typename U>
-  explicit MatcherBase(const MatcherInterface<U>* impl) {
-    Init(impl);
-  }
-
-  template <typename M, typename = typename std::remove_reference<
-                            M>::type::is_gtest_matcher>
-  MatcherBase(M&& m) {  // NOLINT
-    Init(std::forward<M>(m));
-  }
-
-  MatcherBase(const MatcherBase& other)
-      : vtable_(other.vtable_), buffer_(other.buffer_) {
-    if (IsShared()) buffer_.shared->Ref();
-  }
-
-  MatcherBase& operator=(const MatcherBase& other) {
-    if (this == &other) return *this;
-    Destroy();
-    vtable_ = other.vtable_;
-    buffer_ = other.buffer_;
-    if (IsShared()) buffer_.shared->Ref();
-    return *this;
-  }
-
-  MatcherBase(MatcherBase&& other)
-      : vtable_(other.vtable_), buffer_(other.buffer_) {
-    other.vtable_ = nullptr;
-  }
-
-  MatcherBase& operator=(MatcherBase&& other) {
-    if (this == &other) return *this;
-    Destroy();
-    vtable_ = other.vtable_;
-    buffer_ = other.buffer_;
-    other.vtable_ = nullptr;
-    return *this;
-  }
-
-  ~MatcherBase() override { Destroy(); }
-
- private:
-  struct VTable {
-    bool (*match_and_explain)(const MatcherBase&, const T&,
-                              MatchResultListener*);
-    void (*describe)(const MatcherBase&, std::ostream*, bool negation);
-    // Returns the captured object if it implements the interface, otherwise
-    // returns the MatcherBase itself.
-    const MatcherDescriberInterface* (*get_describer)(const MatcherBase&);
-    // Called on shared instances when the reference count reaches 0.
-    void (*shared_destroy)(SharedPayloadBase*);
-  };
-
-  bool IsShared() const {
-    return vtable_ != nullptr && vtable_->shared_destroy != nullptr;
-  }
-
-  // If the implementation uses a listener, call that.
-  template <typename P>
-  static auto MatchAndExplainImpl(const MatcherBase& m, const T& value,
-                                  MatchResultListener* listener)
-      -> decltype(P::Get(m).MatchAndExplain(value, listener->stream())) {
-    return P::Get(m).MatchAndExplain(value, listener->stream());
-  }
-
-  template <typename P>
-  static auto MatchAndExplainImpl(const MatcherBase& m, const T& value,
-                                  MatchResultListener* listener)
-      -> decltype(P::Get(m).MatchAndExplain(value, listener)) {
-    return P::Get(m).MatchAndExplain(value, listener);
-  }
-
-  template <typename P>
-  static void DescribeImpl(const MatcherBase& m, std::ostream* os,
-                           bool negation) {
-    if (negation) {
-      P::Get(m).DescribeNegationTo(os);
-    } else {
-      P::Get(m).DescribeTo(os);
-    }
-  }
-
-  template <typename P>
-  static const MatcherDescriberInterface* GetDescriberImpl(
-      const MatcherBase& m) {
-    // If the impl is a MatcherDescriberInterface, then return it.
-    // Otherwise use MatcherBase itself.
-    // This allows us to implement the GetDescriber() function without support
-    // from the impl, but some users really want to get their impl back when
-    // they call GetDescriber().
-    // We use std::get on a tuple as a workaround of not having `if constexpr`.
-    return std::get<(
-        std::is_convertible<decltype(&P::Get(m)),
-                            const MatcherDescriberInterface*>::value
-            ? 1
-            : 0)>(std::make_tuple(&m, &P::Get(m)));
-  }
-
-  template <typename P>
-  const VTable* GetVTable() {
-    static constexpr VTable kVTable = {&MatchAndExplainImpl<P>,
-                                       &DescribeImpl<P>, &GetDescriberImpl<P>,
-                                       P::shared_destroy};
-    return &kVTable;
-  }
-
-  union Buffer {
-    // Add some types to give Buffer some common alignment/size use cases.
-    void* ptr;
-    double d;
-    int64_t i;
-    // And add one for the out-of-line cases.
-    SharedPayloadBase* shared;
-  };
-
-  void Destroy() {
-    if (IsShared() && buffer_.shared->Unref()) {
-      vtable_->shared_destroy(buffer_.shared);
-    }
-  }
-
-  template <typename M>
-  static constexpr bool IsInlined() {
-    return sizeof(M) <= sizeof(Buffer) && alignof(M) <= alignof(Buffer) &&
-           is_trivially_copy_constructible<M>::value &&
-           std::is_trivially_destructible<M>::value;
-  }
-
-  template <typename M, bool = MatcherBase::IsInlined<M>()>
-  struct ValuePolicy {
-    static const M& Get(const MatcherBase& m) {
-      // When inlined along with Init, need to be explicit to avoid violating
-      // strict aliasing rules.
-      const M *ptr = static_cast<const M*>(
-          static_cast<const void*>(&m.buffer_));
-      return *ptr;
-    }
-    static void Init(MatcherBase& m, M impl) {
-      ::new (static_cast<void*>(&m.buffer_)) M(impl);
-    }
-    static constexpr auto shared_destroy = nullptr;
-  };
-
-  template <typename M>
-  struct ValuePolicy<M, false> {
-    using Shared = SharedPayload<M>;
-    static const M& Get(const MatcherBase& m) {
-      return static_cast<Shared*>(m.buffer_.shared)->value;
-    }
-    template <typename Arg>
-    static void Init(MatcherBase& m, Arg&& arg) {
-      m.buffer_.shared = new Shared(std::forward<Arg>(arg));
-    }
-    static constexpr auto shared_destroy = &Shared::Destroy;
-  };
-
-  template <typename U, bool B>
-  struct ValuePolicy<const MatcherInterface<U>*, B> {
-    using M = const MatcherInterface<U>;
-    using Shared = SharedPayload<std::unique_ptr<M>>;
-    static const M& Get(const MatcherBase& m) {
-      return *static_cast<Shared*>(m.buffer_.shared)->value;
-    }
-    static void Init(MatcherBase& m, M* impl) {
-      m.buffer_.shared = new Shared(std::unique_ptr<M>(impl));
-    }
-
-    static constexpr auto shared_destroy = &Shared::Destroy;
-  };
-
-  template <typename M>
-  void Init(M&& m) {
-    using MM = typename std::decay<M>::type;
-    using Policy = ValuePolicy<MM>;
-    vtable_ = GetVTable<Policy>();
-    Policy::Init(*this, std::forward<M>(m));
-  }
-
-  const VTable* vtable_;
-  Buffer buffer_;
-};
-
-}  // namespace internal
-
-// A Matcher<T> is a copyable and IMMUTABLE (except by assignment)
-// object that can check whether a value of type T matches.  The
-// implementation of Matcher<T> is just a std::shared_ptr to const
-// MatcherInterface<T>.  Don't inherit from Matcher!
-template <typename T>
-class Matcher : public internal::MatcherBase<T> {
- public:
-  // Constructs a null matcher.  Needed for storing Matcher objects in STL
-  // containers.  A default-constructed matcher is not yet initialized.  You
-  // cannot use it until a valid value has been assigned to it.
-  explicit Matcher() {}  // NOLINT
-
-  // Constructs a matcher from its implementation.
-  explicit Matcher(const MatcherInterface<const T&>* impl)
-      : internal::MatcherBase<T>(impl) {}
-
-  template <typename U>
-  explicit Matcher(
-      const MatcherInterface<U>* impl,
-      typename std::enable_if<!std::is_same<U, const U&>::value>::type* =
-          nullptr)
-      : internal::MatcherBase<T>(impl) {}
-
-  template <typename M, typename = typename std::remove_reference<
-                            M>::type::is_gtest_matcher>
-  Matcher(M&& m) : internal::MatcherBase<T>(std::forward<M>(m)) {}  // NOLINT
-
-  // Implicit constructor here allows people to write
-  // EXPECT_CALL(foo, Bar(5)) instead of EXPECT_CALL(foo, Bar(Eq(5))) sometimes
-  Matcher(T value);  // NOLINT
-};
-
-// The following two specializations allow the user to write str
-// instead of Eq(str) and "foo" instead of Eq("foo") when a std::string
-// matcher is expected.
-template <>
-class GTEST_API_ Matcher<const std::string&>
-    : public internal::MatcherBase<const std::string&> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const std::string&>* impl)
-      : internal::MatcherBase<const std::string&>(impl) {}
-
-  template <typename M, typename = typename std::remove_reference<
-                            M>::type::is_gtest_matcher>
-  Matcher(M&& m)  // NOLINT
-      : internal::MatcherBase<const std::string&>(std::forward<M>(m)) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a std::string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-};
-
-template <>
-class GTEST_API_ Matcher<std::string>
-    : public internal::MatcherBase<std::string> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const std::string&>* impl)
-      : internal::MatcherBase<std::string>(impl) {}
-  explicit Matcher(const MatcherInterface<std::string>* impl)
-      : internal::MatcherBase<std::string>(impl) {}
-
-  template <typename M, typename = typename std::remove_reference<
-                            M>::type::is_gtest_matcher>
-  Matcher(M&& m)  // NOLINT
-      : internal::MatcherBase<std::string>(std::forward<M>(m)) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-};
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-// The following two specializations allow the user to write str
-// instead of Eq(str) and "foo" instead of Eq("foo") when a absl::string_view
-// matcher is expected.
-template <>
-class GTEST_API_ Matcher<const internal::StringView&>
-    : public internal::MatcherBase<const internal::StringView&> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const internal::StringView&>* impl)
-      : internal::MatcherBase<const internal::StringView&>(impl) {}
-
-  template <typename M, typename = typename std::remove_reference<
-                            M>::type::is_gtest_matcher>
-  Matcher(M&& m)  // NOLINT
-      : internal::MatcherBase<const internal::StringView&>(std::forward<M>(m)) {
-  }
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a std::string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-
-  // Allows the user to pass absl::string_views or std::string_views directly.
-  Matcher(internal::StringView s);  // NOLINT
-};
-
-template <>
-class GTEST_API_ Matcher<internal::StringView>
-    : public internal::MatcherBase<internal::StringView> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const internal::StringView&>* impl)
-      : internal::MatcherBase<internal::StringView>(impl) {}
-  explicit Matcher(const MatcherInterface<internal::StringView>* impl)
-      : internal::MatcherBase<internal::StringView>(impl) {}
-
-  template <typename M, typename = typename std::remove_reference<
-                            M>::type::is_gtest_matcher>
-  Matcher(M&& m)  // NOLINT
-      : internal::MatcherBase<internal::StringView>(std::forward<M>(m)) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a std::string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-
-  // Allows the user to pass absl::string_views or std::string_views directly.
-  Matcher(internal::StringView s);  // NOLINT
-};
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-// Prints a matcher in a human-readable format.
-template <typename T>
-std::ostream& operator<<(std::ostream& os, const Matcher<T>& matcher) {
-  matcher.DescribeTo(&os);
-  return os;
-}
-
-// The PolymorphicMatcher class template makes it easy to implement a
-// polymorphic matcher (i.e. a matcher that can match values of more
-// than one type, e.g. Eq(n) and NotNull()).
-//
-// To define a polymorphic matcher, a user should provide an Impl
-// class that has a DescribeTo() method and a DescribeNegationTo()
-// method, and define a member function (or member function template)
-//
-//   bool MatchAndExplain(const Value& value,
-//                        MatchResultListener* listener) const;
-//
-// See the definition of NotNull() for a complete example.
-template <class Impl>
-class PolymorphicMatcher {
- public:
-  explicit PolymorphicMatcher(const Impl& an_impl) : impl_(an_impl) {}
-
-  // Returns a mutable reference to the underlying matcher
-  // implementation object.
-  Impl& mutable_impl() { return impl_; }
-
-  // Returns an immutable reference to the underlying matcher
-  // implementation object.
-  const Impl& impl() const { return impl_; }
-
-  template <typename T>
-  operator Matcher<T>() const {
-    return Matcher<T>(new MonomorphicImpl<const T&>(impl_));
-  }
-
- private:
-  template <typename T>
-  class MonomorphicImpl : public MatcherInterface<T> {
-   public:
-    explicit MonomorphicImpl(const Impl& impl) : impl_(impl) {}
-
-    void DescribeTo(::std::ostream* os) const override { impl_.DescribeTo(os); }
-
-    void DescribeNegationTo(::std::ostream* os) const override {
-      impl_.DescribeNegationTo(os);
-    }
-
-    bool MatchAndExplain(T x, MatchResultListener* listener) const override {
-      return impl_.MatchAndExplain(x, listener);
-    }
-
-   private:
-    const Impl impl_;
-  };
-
-  Impl impl_;
-};
-
-// Creates a matcher from its implementation.
-// DEPRECATED: Especially in the generic code, prefer:
-//   Matcher<T>(new MyMatcherImpl<const T&>(...));
-//
-// MakeMatcher may create a Matcher that accepts its argument by value, which
-// leads to unnecessary copies & lack of support for non-copyable types.
-template <typename T>
-inline Matcher<T> MakeMatcher(const MatcherInterface<T>* impl) {
-  return Matcher<T>(impl);
-}
-
-// Creates a polymorphic matcher from its implementation.  This is
-// easier to use than the PolymorphicMatcher<Impl> constructor as it
-// doesn't require you to explicitly write the template argument, e.g.
-//
-//   MakePolymorphicMatcher(foo);
-// vs
-//   PolymorphicMatcher<TypeOfFoo>(foo);
-template <class Impl>
-inline PolymorphicMatcher<Impl> MakePolymorphicMatcher(const Impl& impl) {
-  return PolymorphicMatcher<Impl>(impl);
-}
-
-namespace internal {
-// Implements a matcher that compares a given value with a
-// pre-supplied value using one of the ==, <=, <, etc, operators.  The
-// two values being compared don't have to have the same type.
-//
-// The matcher defined here is polymorphic (for example, Eq(5) can be
-// used to match an int, a short, a double, etc).  Therefore we use
-// a template type conversion operator in the implementation.
-//
-// The following template definition assumes that the Rhs parameter is
-// a "bare" type (i.e. neither 'const T' nor 'T&').
-template <typename D, typename Rhs, typename Op>
-class ComparisonBase {
- public:
-  explicit ComparisonBase(const Rhs& rhs) : rhs_(rhs) {}
-
-  using is_gtest_matcher = void;
-
-  template <typename Lhs>
-  bool MatchAndExplain(const Lhs& lhs, std::ostream*) const {
-    return Op()(lhs, Unwrap(rhs_));
-  }
-  void DescribeTo(std::ostream* os) const {
-    *os << D::Desc() << " ";
-    UniversalPrint(Unwrap(rhs_), os);
-  }
-  void DescribeNegationTo(std::ostream* os) const {
-    *os << D::NegatedDesc() << " ";
-    UniversalPrint(Unwrap(rhs_), os);
-  }
-
- private:
-  template <typename T>
-  static const T& Unwrap(const T& v) {
-    return v;
-  }
-  template <typename T>
-  static const T& Unwrap(std::reference_wrapper<T> v) {
-    return v;
-  }
-
-  Rhs rhs_;
-};
-
-template <typename Rhs>
-class EqMatcher : public ComparisonBase<EqMatcher<Rhs>, Rhs, AnyEq> {
- public:
-  explicit EqMatcher(const Rhs& rhs)
-      : ComparisonBase<EqMatcher<Rhs>, Rhs, AnyEq>(rhs) { }
-  static const char* Desc() { return "is equal to"; }
-  static const char* NegatedDesc() { return "isn't equal to"; }
-};
-template <typename Rhs>
-class NeMatcher : public ComparisonBase<NeMatcher<Rhs>, Rhs, AnyNe> {
- public:
-  explicit NeMatcher(const Rhs& rhs)
-      : ComparisonBase<NeMatcher<Rhs>, Rhs, AnyNe>(rhs) { }
-  static const char* Desc() { return "isn't equal to"; }
-  static const char* NegatedDesc() { return "is equal to"; }
-};
-template <typename Rhs>
-class LtMatcher : public ComparisonBase<LtMatcher<Rhs>, Rhs, AnyLt> {
- public:
-  explicit LtMatcher(const Rhs& rhs)
-      : ComparisonBase<LtMatcher<Rhs>, Rhs, AnyLt>(rhs) { }
-  static const char* Desc() { return "is <"; }
-  static const char* NegatedDesc() { return "isn't <"; }
-};
-template <typename Rhs>
-class GtMatcher : public ComparisonBase<GtMatcher<Rhs>, Rhs, AnyGt> {
- public:
-  explicit GtMatcher(const Rhs& rhs)
-      : ComparisonBase<GtMatcher<Rhs>, Rhs, AnyGt>(rhs) { }
-  static const char* Desc() { return "is >"; }
-  static const char* NegatedDesc() { return "isn't >"; }
-};
-template <typename Rhs>
-class LeMatcher : public ComparisonBase<LeMatcher<Rhs>, Rhs, AnyLe> {
- public:
-  explicit LeMatcher(const Rhs& rhs)
-      : ComparisonBase<LeMatcher<Rhs>, Rhs, AnyLe>(rhs) { }
-  static const char* Desc() { return "is <="; }
-  static const char* NegatedDesc() { return "isn't <="; }
-};
-template <typename Rhs>
-class GeMatcher : public ComparisonBase<GeMatcher<Rhs>, Rhs, AnyGe> {
- public:
-  explicit GeMatcher(const Rhs& rhs)
-      : ComparisonBase<GeMatcher<Rhs>, Rhs, AnyGe>(rhs) { }
-  static const char* Desc() { return "is >="; }
-  static const char* NegatedDesc() { return "isn't >="; }
-};
-
-template <typename T, typename = typename std::enable_if<
-                          std::is_constructible<std::string, T>::value>::type>
-using StringLike = T;
-
-// Implements polymorphic matchers MatchesRegex(regex) and
-// ContainsRegex(regex), which can be used as a Matcher<T> as long as
-// T can be converted to a string.
-class MatchesRegexMatcher {
- public:
-  MatchesRegexMatcher(const RE* regex, bool full_match)
-      : regex_(regex), full_match_(full_match) {}
-
-#if GTEST_INTERNAL_HAS_STRING_VIEW
-  bool MatchAndExplain(const internal::StringView& s,
-                       MatchResultListener* listener) const {
-    return MatchAndExplain(std::string(s), listener);
-  }
-#endif  // GTEST_INTERNAL_HAS_STRING_VIEW
-
-  // Accepts pointer types, particularly:
-  //   const char*
-  //   char*
-  //   const wchar_t*
-  //   wchar_t*
-  template <typename CharType>
-  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
-    return s != nullptr && MatchAndExplain(std::string(s), listener);
-  }
-
-  // Matches anything that can convert to std::string.
-  //
-  // This is a template, not just a plain function with const std::string&,
-  // because absl::string_view has some interfering non-explicit constructors.
-  template <class MatcheeStringType>
-  bool MatchAndExplain(const MatcheeStringType& s,
-                       MatchResultListener* /* listener */) const {
-    const std::string& s2(s);
-    return full_match_ ? RE::FullMatch(s2, *regex_)
-                       : RE::PartialMatch(s2, *regex_);
-  }
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << (full_match_ ? "matches" : "contains") << " regular expression ";
-    UniversalPrinter<std::string>::Print(regex_->pattern(), os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "doesn't " << (full_match_ ? "match" : "contain")
-        << " regular expression ";
-    UniversalPrinter<std::string>::Print(regex_->pattern(), os);
-  }
-
- private:
-  const std::shared_ptr<const RE> regex_;
-  const bool full_match_;
-};
-}  // namespace internal
-
-// Matches a string that fully matches regular expression 'regex'.
-// The matcher takes ownership of 'regex'.
-inline PolymorphicMatcher<internal::MatchesRegexMatcher> MatchesRegex(
-    const internal::RE* regex) {
-  return MakePolymorphicMatcher(internal::MatchesRegexMatcher(regex, true));
-}
-template <typename T = std::string>
-PolymorphicMatcher<internal::MatchesRegexMatcher> MatchesRegex(
-    const internal::StringLike<T>& regex) {
-  return MatchesRegex(new internal::RE(std::string(regex)));
-}
-
-// Matches a string that contains regular expression 'regex'.
-// The matcher takes ownership of 'regex'.
-inline PolymorphicMatcher<internal::MatchesRegexMatcher> ContainsRegex(
-    const internal::RE* regex) {
-  return MakePolymorphicMatcher(internal::MatchesRegexMatcher(regex, false));
-}
-template <typename T = std::string>
-PolymorphicMatcher<internal::MatchesRegexMatcher> ContainsRegex(
-    const internal::StringLike<T>& regex) {
-  return ContainsRegex(new internal::RE(std::string(regex)));
-}
-
-// Creates a polymorphic matcher that matches anything equal to x.
-// Note: if the parameter of Eq() were declared as const T&, Eq("foo")
-// wouldn't compile.
-template <typename T>
-inline internal::EqMatcher<T> Eq(T x) { return internal::EqMatcher<T>(x); }
-
-// Constructs a Matcher<T> from a 'value' of type T.  The constructed
-// matcher matches any value that's equal to 'value'.
-template <typename T>
-Matcher<T>::Matcher(T value) { *this = Eq(value); }
-
-// Creates a monomorphic matcher that matches anything with type Lhs
-// and equal to rhs.  A user may need to use this instead of Eq(...)
-// in order to resolve an overloading ambiguity.
-//
-// TypedEq<T>(x) is just a convenient short-hand for Matcher<T>(Eq(x))
-// or Matcher<T>(x), but more readable than the latter.
-//
-// We could define similar monomorphic matchers for other comparison
-// operations (e.g. TypedLt, TypedGe, and etc), but decided not to do
-// it yet as those are used much less than Eq() in practice.  A user
-// can always write Matcher<T>(Lt(5)) to be explicit about the type,
-// for example.
-template <typename Lhs, typename Rhs>
-inline Matcher<Lhs> TypedEq(const Rhs& rhs) { return Eq(rhs); }
-
-// Creates a polymorphic matcher that matches anything >= x.
-template <typename Rhs>
-inline internal::GeMatcher<Rhs> Ge(Rhs x) {
-  return internal::GeMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything > x.
-template <typename Rhs>
-inline internal::GtMatcher<Rhs> Gt(Rhs x) {
-  return internal::GtMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything <= x.
-template <typename Rhs>
-inline internal::LeMatcher<Rhs> Le(Rhs x) {
-  return internal::LeMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything < x.
-template <typename Rhs>
-inline internal::LtMatcher<Rhs> Lt(Rhs x) {
-  return internal::LtMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything != x.
-template <typename Rhs>
-inline internal::NeMatcher<Rhs> Ne(Rhs x) {
-  return internal::NeMatcher<Rhs>(x);
-}
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251 5046
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
-
-#include <stdio.h>
-#include <memory>
-
-namespace testing {
-namespace internal {
-
-GTEST_DECLARE_string_(internal_run_death_test);
-
-// Names of the flags (needed for parsing Google Test flags).
-const char kDeathTestStyleFlag[] = "death_test_style";
-const char kDeathTestUseFork[] = "death_test_use_fork";
-const char kInternalRunDeathTestFlag[] = "internal_run_death_test";
-
-#if GTEST_HAS_DEATH_TEST
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-// DeathTest is a class that hides much of the complexity of the
-// GTEST_DEATH_TEST_ macro.  It is abstract; its static Create method
-// returns a concrete class that depends on the prevailing death test
-// style, as defined by the --gtest_death_test_style and/or
-// --gtest_internal_run_death_test flags.
-
-// In describing the results of death tests, these terms are used with
-// the corresponding definitions:
-//
-// exit status:  The integer exit information in the format specified
-//               by wait(2)
-// exit code:    The integer code passed to exit(3), _exit(2), or
-//               returned from main()
-class GTEST_API_ DeathTest {
- public:
-  // Create returns false if there was an error determining the
-  // appropriate action to take for the current death test; for example,
-  // if the gtest_death_test_style flag is set to an invalid value.
-  // The LastMessage method will return a more detailed message in that
-  // case.  Otherwise, the DeathTest pointer pointed to by the "test"
-  // argument is set.  If the death test should be skipped, the pointer
-  // is set to NULL; otherwise, it is set to the address of a new concrete
-  // DeathTest object that controls the execution of the current test.
-  static bool Create(const char* statement, Matcher<const std::string&> matcher,
-                     const char* file, int line, DeathTest** test);
-  DeathTest();
-  virtual ~DeathTest() { }
-
-  // A helper class that aborts a death test when it's deleted.
-  class ReturnSentinel {
-   public:
-    explicit ReturnSentinel(DeathTest* test) : test_(test) { }
-    ~ReturnSentinel() { test_->Abort(TEST_ENCOUNTERED_RETURN_STATEMENT); }
-   private:
-    DeathTest* const test_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ReturnSentinel);
-  } GTEST_ATTRIBUTE_UNUSED_;
-
-  // An enumeration of possible roles that may be taken when a death
-  // test is encountered.  EXECUTE means that the death test logic should
-  // be executed immediately.  OVERSEE means that the program should prepare
-  // the appropriate environment for a child process to execute the death
-  // test, then wait for it to complete.
-  enum TestRole { OVERSEE_TEST, EXECUTE_TEST };
-
-  // An enumeration of the three reasons that a test might be aborted.
-  enum AbortReason {
-    TEST_ENCOUNTERED_RETURN_STATEMENT,
-    TEST_THREW_EXCEPTION,
-    TEST_DID_NOT_DIE
-  };
-
-  // Assumes one of the above roles.
-  virtual TestRole AssumeRole() = 0;
-
-  // Waits for the death test to finish and returns its status.
-  virtual int Wait() = 0;
-
-  // Returns true if the death test passed; that is, the test process
-  // exited during the test, its exit status matches a user-supplied
-  // predicate, and its stderr output matches a user-supplied regular
-  // expression.
-  // The user-supplied predicate may be a macro expression rather
-  // than a function pointer or functor, or else Wait and Passed could
-  // be combined.
-  virtual bool Passed(bool exit_status_ok) = 0;
-
-  // Signals that the death test did not die as expected.
-  virtual void Abort(AbortReason reason) = 0;
-
-  // Returns a human-readable outcome message regarding the outcome of
-  // the last death test.
-  static const char* LastMessage();
-
-  static void set_last_death_test_message(const std::string& message);
-
- private:
-  // A string containing a description of the outcome of the last death test.
-  static std::string last_death_test_message_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DeathTest);
-};
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// Factory interface for death tests.  May be mocked out for testing.
-class DeathTestFactory {
- public:
-  virtual ~DeathTestFactory() { }
-  virtual bool Create(const char* statement,
-                      Matcher<const std::string&> matcher, const char* file,
-                      int line, DeathTest** test) = 0;
-};
-
-// A concrete DeathTestFactory implementation for normal use.
-class DefaultDeathTestFactory : public DeathTestFactory {
- public:
-  bool Create(const char* statement, Matcher<const std::string&> matcher,
-              const char* file, int line, DeathTest** test) override;
-};
-
-// Returns true if exit_status describes a process that was terminated
-// by a signal, or exited normally with a nonzero exit code.
-GTEST_API_ bool ExitedUnsuccessfully(int exit_status);
-
-// A string passed to EXPECT_DEATH (etc.) is caught by one of these overloads
-// and interpreted as a regex (rather than an Eq matcher) for legacy
-// compatibility.
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(
-    ::testing::internal::RE regex) {
-  return ContainsRegex(regex.pattern());
-}
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(const char* regex) {
-  return ContainsRegex(regex);
-}
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(
-    const ::std::string& regex) {
-  return ContainsRegex(regex);
-}
-
-// If a Matcher<const ::std::string&> is passed to EXPECT_DEATH (etc.), it's
-// used directly.
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(
-    Matcher<const ::std::string&> matcher) {
-  return matcher;
-}
-
-// Traps C++ exceptions escaping statement and reports them as test
-// failures. Note that trapping SEH exceptions is not implemented here.
-# if GTEST_HAS_EXCEPTIONS
-#  define GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, death_test) \
-  try { \
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-  } catch (const ::std::exception& gtest_exception) { \
-    fprintf(\
-        stderr, \
-        "\n%s: Caught std::exception-derived exception escaping the " \
-        "death test statement. Exception message: %s\n", \
-        ::testing::internal::FormatFileLocation(__FILE__, __LINE__).c_str(), \
-        gtest_exception.what()); \
-    fflush(stderr); \
-    death_test->Abort(::testing::internal::DeathTest::TEST_THREW_EXCEPTION); \
-  } catch (...) { \
-    death_test->Abort(::testing::internal::DeathTest::TEST_THREW_EXCEPTION); \
-  }
-
-# else
-#  define GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, death_test) \
-  GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
-
-# endif
-
-// This macro is for implementing ASSERT_DEATH*, EXPECT_DEATH*,
-// ASSERT_EXIT*, and EXPECT_EXIT*.
-#define GTEST_DEATH_TEST_(statement, predicate, regex_or_matcher, fail)        \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                                \
-  if (::testing::internal::AlwaysTrue()) {                                     \
-    ::testing::internal::DeathTest* gtest_dt;                                  \
-    if (!::testing::internal::DeathTest::Create(                               \
-            #statement,                                                        \
-            ::testing::internal::MakeDeathTestMatcher(regex_or_matcher),       \
-            __FILE__, __LINE__, &gtest_dt)) {                                  \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__);                        \
-    }                                                                          \
-    if (gtest_dt != nullptr) {                                                 \
-      std::unique_ptr< ::testing::internal::DeathTest> gtest_dt_ptr(gtest_dt); \
-      switch (gtest_dt->AssumeRole()) {                                        \
-        case ::testing::internal::DeathTest::OVERSEE_TEST:                     \
-          if (!gtest_dt->Passed(predicate(gtest_dt->Wait()))) {                \
-            goto GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__);                  \
-          }                                                                    \
-          break;                                                               \
-        case ::testing::internal::DeathTest::EXECUTE_TEST: {                   \
-          ::testing::internal::DeathTest::ReturnSentinel gtest_sentinel(       \
-              gtest_dt);                                                       \
-          GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, gtest_dt);            \
-          gtest_dt->Abort(::testing::internal::DeathTest::TEST_DID_NOT_DIE);   \
-          break;                                                               \
-        }                                                                      \
-        default:                                                               \
-          break;                                                               \
-      }                                                                        \
-    }                                                                          \
-  } else                                                                       \
-    GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__)                                \
-        : fail(::testing::internal::DeathTest::LastMessage())
-// The symbol "fail" here expands to something into which a message
-// can be streamed.
-
-// This macro is for implementing ASSERT/EXPECT_DEBUG_DEATH when compiled in
-// NDEBUG mode. In this case we need the statements to be executed and the macro
-// must accept a streamed message even though the message is never printed.
-// The regex object is not evaluated, but it is used to prevent "unused"
-// warnings and to avoid an expression that doesn't compile in debug mode.
-#define GTEST_EXECUTE_STATEMENT_(statement, regex_or_matcher)    \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                  \
-  if (::testing::internal::AlwaysTrue()) {                       \
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement);   \
-  } else if (!::testing::internal::AlwaysTrue()) {               \
-    ::testing::internal::MakeDeathTestMatcher(regex_or_matcher); \
-  } else                                                         \
-    ::testing::Message()
-
-// A class representing the parsed contents of the
-// --gtest_internal_run_death_test flag, as it existed when
-// RUN_ALL_TESTS was called.
-class InternalRunDeathTestFlag {
- public:
-  InternalRunDeathTestFlag(const std::string& a_file,
-                           int a_line,
-                           int an_index,
-                           int a_write_fd)
-      : file_(a_file), line_(a_line), index_(an_index),
-        write_fd_(a_write_fd) {}
-
-  ~InternalRunDeathTestFlag() {
-    if (write_fd_ >= 0)
-      posix::Close(write_fd_);
-  }
-
-  const std::string& file() const { return file_; }
-  int line() const { return line_; }
-  int index() const { return index_; }
-  int write_fd() const { return write_fd_; }
-
- private:
-  std::string file_;
-  int line_;
-  int index_;
-  int write_fd_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(InternalRunDeathTestFlag);
-};
-
-// Returns a newly created InternalRunDeathTestFlag object with fields
-// initialized from the GTEST_FLAG(internal_run_death_test) flag if
-// the flag is specified; otherwise returns NULL.
-InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag();
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
-
-namespace testing {
-
-// This flag controls the style of death tests.  Valid values are "threadsafe",
-// meaning that the death test child process will re-execute the test binary
-// from the start, running only a single death test, or "fast",
-// meaning that the child process will execute the test logic immediately
-// after forking.
-GTEST_DECLARE_string_(death_test_style);
-
-#if GTEST_HAS_DEATH_TEST
-
-namespace internal {
-
-// Returns a Boolean value indicating whether the caller is currently
-// executing in the context of the death test child process.  Tools such as
-// Valgrind heap checkers may need this to modify their behavior in death
-// tests.  IMPORTANT: This is an internal utility.  Using it may break the
-// implementation of death tests.  User code MUST NOT use it.
-GTEST_API_ bool InDeathTestChild();
-
-}  // namespace internal
-
-// The following macros are useful for writing death tests.
-
-// Here's what happens when an ASSERT_DEATH* or EXPECT_DEATH* is
-// executed:
-//
-//   1. It generates a warning if there is more than one active
-//   thread.  This is because it's safe to fork() or clone() only
-//   when there is a single thread.
-//
-//   2. The parent process clone()s a sub-process and runs the death
-//   test in it; the sub-process exits with code 0 at the end of the
-//   death test, if it hasn't exited already.
-//
-//   3. The parent process waits for the sub-process to terminate.
-//
-//   4. The parent process checks the exit code and error message of
-//   the sub-process.
-//
-// Examples:
-//
-//   ASSERT_DEATH(server.SendMessage(56, "Hello"), "Invalid port number");
-//   for (int i = 0; i < 5; i++) {
-//     EXPECT_DEATH(server.ProcessRequest(i),
-//                  "Invalid request .* in ProcessRequest()")
-//                  << "Failed to die on request " << i;
-//   }
-//
-//   ASSERT_EXIT(server.ExitNow(), ::testing::ExitedWithCode(0), "Exiting");
-//
-//   bool KilledBySIGHUP(int exit_code) {
-//     return WIFSIGNALED(exit_code) && WTERMSIG(exit_code) == SIGHUP;
-//   }
-//
-//   ASSERT_EXIT(client.HangUpServer(), KilledBySIGHUP, "Hanging up!");
-//
-// On the regular expressions used in death tests:
-//
-//   GOOGLETEST_CM0005 DO NOT DELETE
-//   On POSIX-compliant systems (*nix), we use the <regex.h> library,
-//   which uses the POSIX extended regex syntax.
-//
-//   On other platforms (e.g. Windows or Mac), we only support a simple regex
-//   syntax implemented as part of Google Test.  This limited
-//   implementation should be enough most of the time when writing
-//   death tests; though it lacks many features you can find in PCRE
-//   or POSIX extended regex syntax.  For example, we don't support
-//   union ("x|y"), grouping ("(xy)"), brackets ("[xy]"), and
-//   repetition count ("x{5,7}"), among others.
-//
-//   Below is the syntax that we do support.  We chose it to be a
-//   subset of both PCRE and POSIX extended regex, so it's easy to
-//   learn wherever you come from.  In the following: 'A' denotes a
-//   literal character, period (.), or a single \\ escape sequence;
-//   'x' and 'y' denote regular expressions; 'm' and 'n' are for
-//   natural numbers.
-//
-//     c     matches any literal character c
-//     \\d   matches any decimal digit
-//     \\D   matches any character that's not a decimal digit
-//     \\f   matches \f
-//     \\n   matches \n
-//     \\r   matches \r
-//     \\s   matches any ASCII whitespace, including \n
-//     \\S   matches any character that's not a whitespace
-//     \\t   matches \t
-//     \\v   matches \v
-//     \\w   matches any letter, _, or decimal digit
-//     \\W   matches any character that \\w doesn't match
-//     \\c   matches any literal character c, which must be a punctuation
-//     .     matches any single character except \n
-//     A?    matches 0 or 1 occurrences of A
-//     A*    matches 0 or many occurrences of A
-//     A+    matches 1 or many occurrences of A
-//     ^     matches the beginning of a string (not that of each line)
-//     $     matches the end of a string (not that of each line)
-//     xy    matches x followed by y
-//
-//   If you accidentally use PCRE or POSIX extended regex features
-//   not implemented by us, you will get a run-time failure.  In that
-//   case, please try to rewrite your regular expression within the
-//   above syntax.
-//
-//   This implementation is *not* meant to be as highly tuned or robust
-//   as a compiled regex library, but should perform well enough for a
-//   death test, which already incurs significant overhead by launching
-//   a child process.
-//
-// Known caveats:
-//
-//   A "threadsafe" style death test obtains the path to the test
-//   program from argv[0] and re-executes it in the sub-process.  For
-//   simplicity, the current implementation doesn't search the PATH
-//   when launching the sub-process.  This means that the user must
-//   invoke the test program via a path that contains at least one
-//   path separator (e.g. path/to/foo_test and
-//   /absolute/path/to/bar_test are fine, but foo_test is not).  This
-//   is rarely a problem as people usually don't put the test binary
-//   directory in PATH.
-//
-
-// Asserts that a given statement causes the program to exit, with an
-// integer exit status that satisfies predicate, and emitting error output
-// that matches regex.
-# define ASSERT_EXIT(statement, predicate, regex) \
-    GTEST_DEATH_TEST_(statement, predicate, regex, GTEST_FATAL_FAILURE_)
-
-// Like ASSERT_EXIT, but continues on to successive tests in the
-// test suite, if any:
-# define EXPECT_EXIT(statement, predicate, regex) \
-    GTEST_DEATH_TEST_(statement, predicate, regex, GTEST_NONFATAL_FAILURE_)
-
-// Asserts that a given statement causes the program to exit, either by
-// explicitly exiting with a nonzero exit code or being killed by a
-// signal, and emitting error output that matches regex.
-# define ASSERT_DEATH(statement, regex) \
-    ASSERT_EXIT(statement, ::testing::internal::ExitedUnsuccessfully, regex)
-
-// Like ASSERT_DEATH, but continues on to successive tests in the
-// test suite, if any:
-# define EXPECT_DEATH(statement, regex) \
-    EXPECT_EXIT(statement, ::testing::internal::ExitedUnsuccessfully, regex)
-
-// Two predicate classes that can be used in {ASSERT,EXPECT}_EXIT*:
-
-// Tests that an exit code describes a normal exit with a given exit code.
-class GTEST_API_ ExitedWithCode {
- public:
-  explicit ExitedWithCode(int exit_code);
-  ExitedWithCode(const ExitedWithCode&) = default;
-  void operator=(const ExitedWithCode& other) = delete;
-  bool operator()(int exit_status) const;
- private:
-  const int exit_code_;
-};
-
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-// Tests that an exit code describes an exit due to termination by a
-// given signal.
-// GOOGLETEST_CM0006 DO NOT DELETE
-class GTEST_API_ KilledBySignal {
- public:
-  explicit KilledBySignal(int signum);
-  bool operator()(int exit_status) const;
- private:
-  const int signum_;
-};
-# endif  // !GTEST_OS_WINDOWS
-
-// EXPECT_DEBUG_DEATH asserts that the given statements die in debug mode.
-// The death testing framework causes this to have interesting semantics,
-// since the sideeffects of the call are only visible in opt mode, and not
-// in debug mode.
-//
-// In practice, this can be used to test functions that utilize the
-// LOG(DFATAL) macro using the following style:
-//
-// int DieInDebugOr12(int* sideeffect) {
-//   if (sideeffect) {
-//     *sideeffect = 12;
-//   }
-//   LOG(DFATAL) << "death";
-//   return 12;
-// }
-//
-// TEST(TestSuite, TestDieOr12WorksInDgbAndOpt) {
-//   int sideeffect = 0;
-//   // Only asserts in dbg.
-//   EXPECT_DEBUG_DEATH(DieInDebugOr12(&sideeffect), "death");
-//
-// #ifdef NDEBUG
-//   // opt-mode has sideeffect visible.
-//   EXPECT_EQ(12, sideeffect);
-// #else
-//   // dbg-mode no visible sideeffect.
-//   EXPECT_EQ(0, sideeffect);
-// #endif
-// }
-//
-// This will assert that DieInDebugReturn12InOpt() crashes in debug
-// mode, usually due to a DCHECK or LOG(DFATAL), but returns the
-// appropriate fallback value (12 in this case) in opt mode. If you
-// need to test that a function has appropriate side-effects in opt
-// mode, include assertions against the side-effects.  A general
-// pattern for this is:
-//
-// EXPECT_DEBUG_DEATH({
-//   // Side-effects here will have an effect after this statement in
-//   // opt mode, but none in debug mode.
-//   EXPECT_EQ(12, DieInDebugOr12(&sideeffect));
-// }, "death");
-//
-# ifdef NDEBUG
-
-#  define EXPECT_DEBUG_DEATH(statement, regex) \
-  GTEST_EXECUTE_STATEMENT_(statement, regex)
-
-#  define ASSERT_DEBUG_DEATH(statement, regex) \
-  GTEST_EXECUTE_STATEMENT_(statement, regex)
-
-# else
-
-#  define EXPECT_DEBUG_DEATH(statement, regex) \
-  EXPECT_DEATH(statement, regex)
-
-#  define ASSERT_DEBUG_DEATH(statement, regex) \
-  ASSERT_DEATH(statement, regex)
-
-# endif  // NDEBUG for EXPECT_DEBUG_DEATH
-#endif  // GTEST_HAS_DEATH_TEST
-
-// This macro is used for implementing macros such as
-// EXPECT_DEATH_IF_SUPPORTED and ASSERT_DEATH_IF_SUPPORTED on systems where
-// death tests are not supported. Those macros must compile on such systems
-// if and only if EXPECT_DEATH and ASSERT_DEATH compile with the same parameters
-// on systems that support death tests. This allows one to write such a macro on
-// a system that does not support death tests and be sure that it will compile
-// on a death-test supporting system. It is exposed publicly so that systems
-// that have death-tests with stricter requirements than GTEST_HAS_DEATH_TEST
-// can write their own equivalent of EXPECT_DEATH_IF_SUPPORTED and
-// ASSERT_DEATH_IF_SUPPORTED.
-//
-// Parameters:
-//   statement -  A statement that a macro such as EXPECT_DEATH would test
-//                for program termination. This macro has to make sure this
-//                statement is compiled but not executed, to ensure that
-//                EXPECT_DEATH_IF_SUPPORTED compiles with a certain
-//                parameter if and only if EXPECT_DEATH compiles with it.
-//   regex     -  A regex that a macro such as EXPECT_DEATH would use to test
-//                the output of statement.  This parameter has to be
-//                compiled but not evaluated by this macro, to ensure that
-//                this macro only accepts expressions that a macro such as
-//                EXPECT_DEATH would accept.
-//   terminator - Must be an empty statement for EXPECT_DEATH_IF_SUPPORTED
-//                and a return statement for ASSERT_DEATH_IF_SUPPORTED.
-//                This ensures that ASSERT_DEATH_IF_SUPPORTED will not
-//                compile inside functions where ASSERT_DEATH doesn't
-//                compile.
-//
-//  The branch that has an always false condition is used to ensure that
-//  statement and regex are compiled (and thus syntactically correct) but
-//  never executed. The unreachable code macro protects the terminator
-//  statement from generating an 'unreachable code' warning in case
-//  statement unconditionally returns or throws. The Message constructor at
-//  the end allows the syntax of streaming additional messages into the
-//  macro, for compilational compatibility with EXPECT_DEATH/ASSERT_DEATH.
-# define GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, terminator) \
-    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-    if (::testing::internal::AlwaysTrue()) { \
-      GTEST_LOG_(WARNING) \
-          << "Death tests are not supported on this platform.\n" \
-          << "Statement '" #statement "' cannot be verified."; \
-    } else if (::testing::internal::AlwaysFalse()) { \
-      ::testing::internal::RE::PartialMatch(".*", (regex)); \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-      terminator; \
-    } else \
-      ::testing::Message()
-
-// EXPECT_DEATH_IF_SUPPORTED(statement, regex) and
-// ASSERT_DEATH_IF_SUPPORTED(statement, regex) expand to real death tests if
-// death tests are supported; otherwise they just issue a warning.  This is
-// useful when you are combining death test assertions with normal test
-// assertions in one test.
-#if GTEST_HAS_DEATH_TEST
-# define EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
-    EXPECT_DEATH(statement, regex)
-# define ASSERT_DEATH_IF_SUPPORTED(statement, regex) \
-    ASSERT_DEATH(statement, regex)
-#else
-# define EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
-    GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, )
-# define ASSERT_DEATH_IF_SUPPORTED(statement, regex) \
-    GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, return)
-#endif
-
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Macros and functions for implementing parameterized tests
-// in Google C++ Testing and Mocking Framework (Google Test)
-//
-// GOOGLETEST_CM0001 DO NOT DELETE
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
-
-// Value-parameterized tests allow you to test your code with different
-// parameters without writing multiple copies of the same test.
-//
-// Here is how you use value-parameterized tests:
-
-#if 0
-
-// To write value-parameterized tests, first you should define a fixture
-// class. It is usually derived from testing::TestWithParam<T> (see below for
-// another inheritance scheme that's sometimes useful in more complicated
-// class hierarchies), where the type of your parameter values.
-// TestWithParam<T> is itself derived from testing::Test. T can be any
-// copyable type. If it's a raw pointer, you are responsible for managing the
-// lifespan of the pointed values.
-
-class FooTest : public ::testing::TestWithParam<const char*> {
-  // You can implement all the usual class fixture members here.
-};
-
-// Then, use the TEST_P macro to define as many parameterized tests
-// for this fixture as you want. The _P suffix is for "parameterized"
-// or "pattern", whichever you prefer to think.
-
-TEST_P(FooTest, DoesBlah) {
-  // Inside a test, access the test parameter with the GetParam() method
-  // of the TestWithParam<T> class:
-  EXPECT_TRUE(foo.Blah(GetParam()));
-  ...
-}
-
-TEST_P(FooTest, HasBlahBlah) {
-  ...
-}
-
-// Finally, you can use INSTANTIATE_TEST_SUITE_P to instantiate the test
-// case with any set of parameters you want. Google Test defines a number
-// of functions for generating test parameters. They return what we call
-// (surprise!) parameter generators. Here is a summary of them, which
-// are all in the testing namespace:
-//
-//
-//  Range(begin, end [, step]) - Yields values {begin, begin+step,
-//                               begin+step+step, ...}. The values do not
-//                               include end. step defaults to 1.
-//  Values(v1, v2, ..., vN)    - Yields values {v1, v2, ..., vN}.
-//  ValuesIn(container)        - Yields values from a C-style array, an STL
-//  ValuesIn(begin,end)          container, or an iterator range [begin, end).
-//  Bool()                     - Yields sequence {false, true}.
-//  Combine(g1, g2, ..., gN)   - Yields all combinations (the Cartesian product
-//                               for the math savvy) of the values generated
-//                               by the N generators.
-//
-// For more details, see comments at the definitions of these functions below
-// in this file.
-//
-// The following statement will instantiate tests from the FooTest test suite
-// each with parameter values "meeny", "miny", and "moe".
-
-INSTANTIATE_TEST_SUITE_P(InstantiationName,
-                         FooTest,
-                         Values("meeny", "miny", "moe"));
-
-// To distinguish different instances of the pattern, (yes, you
-// can instantiate it more than once) the first argument to the
-// INSTANTIATE_TEST_SUITE_P macro is a prefix that will be added to the
-// actual test suite name. Remember to pick unique prefixes for different
-// instantiations. The tests from the instantiation above will have
-// these names:
-//
-//    * InstantiationName/FooTest.DoesBlah/0 for "meeny"
-//    * InstantiationName/FooTest.DoesBlah/1 for "miny"
-//    * InstantiationName/FooTest.DoesBlah/2 for "moe"
-//    * InstantiationName/FooTest.HasBlahBlah/0 for "meeny"
-//    * InstantiationName/FooTest.HasBlahBlah/1 for "miny"
-//    * InstantiationName/FooTest.HasBlahBlah/2 for "moe"
-//
-// You can use these names in --gtest_filter.
-//
-// This statement will instantiate all tests from FooTest again, each
-// with parameter values "cat" and "dog":
-
-const char* pets[] = {"cat", "dog"};
-INSTANTIATE_TEST_SUITE_P(AnotherInstantiationName, FooTest, ValuesIn(pets));
-
-// The tests from the instantiation above will have these names:
-//
-//    * AnotherInstantiationName/FooTest.DoesBlah/0 for "cat"
-//    * AnotherInstantiationName/FooTest.DoesBlah/1 for "dog"
-//    * AnotherInstantiationName/FooTest.HasBlahBlah/0 for "cat"
-//    * AnotherInstantiationName/FooTest.HasBlahBlah/1 for "dog"
-//
-// Please note that INSTANTIATE_TEST_SUITE_P will instantiate all tests
-// in the given test suite, whether their definitions come before or
-// AFTER the INSTANTIATE_TEST_SUITE_P statement.
-//
-// Please also note that generator expressions (including parameters to the
-// generators) are evaluated in InitGoogleTest(), after main() has started.
-// This allows the user on one hand, to adjust generator parameters in order
-// to dynamically determine a set of tests to run and on the other hand,
-// give the user a chance to inspect the generated tests with Google Test
-// reflection API before RUN_ALL_TESTS() is executed.
-//
-// You can see samples/sample7_unittest.cc and samples/sample8_unittest.cc
-// for more examples.
-//
-// In the future, we plan to publish the API for defining new parameter
-// generators. But for now this interface remains part of the internal
-// implementation and is subject to change.
-//
-//
-// A parameterized test fixture must be derived from testing::Test and from
-// testing::WithParamInterface<T>, where T is the type of the parameter
-// values. Inheriting from TestWithParam<T> satisfies that requirement because
-// TestWithParam<T> inherits from both Test and WithParamInterface. In more
-// complicated hierarchies, however, it is occasionally useful to inherit
-// separately from Test and WithParamInterface. For example:
-
-class BaseTest : public ::testing::Test {
-  // You can inherit all the usual members for a non-parameterized test
-  // fixture here.
-};
-
-class DerivedTest : public BaseTest, public ::testing::WithParamInterface<int> {
-  // The usual test fixture members go here too.
-};
-
-TEST_F(BaseTest, HasFoo) {
-  // This is an ordinary non-parameterized test.
-}
-
-TEST_P(DerivedTest, DoesBlah) {
-  // GetParam works just the same here as if you inherit from TestWithParam.
-  EXPECT_TRUE(foo.Blah(GetParam()));
-}
-
-#endif  // 0
-
-#include <iterator>
-#include <utility>
-
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Type and function utilities for implementing parameterized tests.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
-#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
-
-#include <ctype.h>
-
-#include <cassert>
-#include <iterator>
-#include <memory>
-#include <set>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
-
-#include <iosfwd>
-#include <vector>
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// A copyable object representing the result of a test part (i.e. an
-// assertion or an explicit FAIL(), ADD_FAILURE(), or SUCCESS()).
-//
-// Don't inherit from TestPartResult as its destructor is not virtual.
-class GTEST_API_ TestPartResult {
- public:
-  // The possible outcomes of a test part (i.e. an assertion or an
-  // explicit SUCCEED(), FAIL(), or ADD_FAILURE()).
-  enum Type {
-    kSuccess,          // Succeeded.
-    kNonFatalFailure,  // Failed but the test can continue.
-    kFatalFailure,     // Failed and the test should be terminated.
-    kSkip              // Skipped.
-  };
-
-  // C'tor.  TestPartResult does NOT have a default constructor.
-  // Always use this constructor (with parameters) to create a
-  // TestPartResult object.
-  TestPartResult(Type a_type, const char* a_file_name, int a_line_number,
-                 const char* a_message)
-      : type_(a_type),
-        file_name_(a_file_name == nullptr ? "" : a_file_name),
-        line_number_(a_line_number),
-        summary_(ExtractSummary(a_message)),
-        message_(a_message) {}
-
-  // Gets the outcome of the test part.
-  Type type() const { return type_; }
-
-  // Gets the name of the source file where the test part took place, or
-  // NULL if it's unknown.
-  const char* file_name() const {
-    return file_name_.empty() ? nullptr : file_name_.c_str();
-  }
-
-  // Gets the line in the source file where the test part took place,
-  // or -1 if it's unknown.
-  int line_number() const { return line_number_; }
-
-  // Gets the summary of the failure message.
-  const char* summary() const { return summary_.c_str(); }
-
-  // Gets the message associated with the test part.
-  const char* message() const { return message_.c_str(); }
-
-  // Returns true if and only if the test part was skipped.
-  bool skipped() const { return type_ == kSkip; }
-
-  // Returns true if and only if the test part passed.
-  bool passed() const { return type_ == kSuccess; }
-
-  // Returns true if and only if the test part non-fatally failed.
-  bool nonfatally_failed() const { return type_ == kNonFatalFailure; }
-
-  // Returns true if and only if the test part fatally failed.
-  bool fatally_failed() const { return type_ == kFatalFailure; }
-
-  // Returns true if and only if the test part failed.
-  bool failed() const { return fatally_failed() || nonfatally_failed(); }
-
- private:
-  Type type_;
-
-  // Gets the summary of the failure message by omitting the stack
-  // trace in it.
-  static std::string ExtractSummary(const char* message);
-
-  // The name of the source file where the test part took place, or
-  // "" if the source file is unknown.
-  std::string file_name_;
-  // The line in the source file where the test part took place, or -1
-  // if the line number is unknown.
-  int line_number_;
-  std::string summary_;  // The test failure summary.
-  std::string message_;  // The test failure message.
-};
-
-// Prints a TestPartResult object.
-std::ostream& operator<<(std::ostream& os, const TestPartResult& result);
-
-// An array of TestPartResult objects.
-//
-// Don't inherit from TestPartResultArray as its destructor is not
-// virtual.
-class GTEST_API_ TestPartResultArray {
- public:
-  TestPartResultArray() {}
-
-  // Appends the given TestPartResult to the array.
-  void Append(const TestPartResult& result);
-
-  // Returns the TestPartResult at the given index (0-based).
-  const TestPartResult& GetTestPartResult(int index) const;
-
-  // Returns the number of TestPartResult objects in the array.
-  int size() const;
-
- private:
-  std::vector<TestPartResult> array_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestPartResultArray);
-};
-
-// This interface knows how to report a test part result.
-class GTEST_API_ TestPartResultReporterInterface {
- public:
-  virtual ~TestPartResultReporterInterface() {}
-
-  virtual void ReportTestPartResult(const TestPartResult& result) = 0;
-};
-
-namespace internal {
-
-// This helper class is used by {ASSERT|EXPECT}_NO_FATAL_FAILURE to check if a
-// statement generates new fatal failures. To do so it registers itself as the
-// current test part result reporter. Besides checking if fatal failures were
-// reported, it only delegates the reporting to the former result reporter.
-// The original result reporter is restored in the destructor.
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-class GTEST_API_ HasNewFatalFailureHelper
-    : public TestPartResultReporterInterface {
- public:
-  HasNewFatalFailureHelper();
-  ~HasNewFatalFailureHelper() override;
-  void ReportTestPartResult(const TestPartResult& result) override;
-  bool has_new_fatal_failure() const { return has_new_fatal_failure_; }
- private:
-  bool has_new_fatal_failure_;
-  TestPartResultReporterInterface* original_reporter_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(HasNewFatalFailureHelper);
-};
-
-}  // namespace internal
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
-
-namespace testing {
-// Input to a parameterized test name generator, describing a test parameter.
-// Consists of the parameter value and the integer parameter index.
-template <class ParamType>
-struct TestParamInfo {
-  TestParamInfo(const ParamType& a_param, size_t an_index) :
-    param(a_param),
-    index(an_index) {}
-  ParamType param;
-  size_t index;
-};
-
-// A builtin parameterized test name generator which returns the result of
-// testing::PrintToString.
-struct PrintToStringParamName {
-  template <class ParamType>
-  std::string operator()(const TestParamInfo<ParamType>& info) const {
-    return PrintToString(info.param);
-  }
-};
-
-namespace internal {
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-// Utility Functions
-
-// Outputs a message explaining invalid registration of different
-// fixture class for the same test suite. This may happen when
-// TEST_P macro is used to define two tests with the same name
-// but in different namespaces.
-GTEST_API_ void ReportInvalidTestSuiteType(const char* test_suite_name,
-                                           CodeLocation code_location);
-
-template <typename> class ParamGeneratorInterface;
-template <typename> class ParamGenerator;
-
-// Interface for iterating over elements provided by an implementation
-// of ParamGeneratorInterface<T>.
-template <typename T>
-class ParamIteratorInterface {
- public:
-  virtual ~ParamIteratorInterface() {}
-  // A pointer to the base generator instance.
-  // Used only for the purposes of iterator comparison
-  // to make sure that two iterators belong to the same generator.
-  virtual const ParamGeneratorInterface<T>* BaseGenerator() const = 0;
-  // Advances iterator to point to the next element
-  // provided by the generator. The caller is responsible
-  // for not calling Advance() on an iterator equal to
-  // BaseGenerator()->End().
-  virtual void Advance() = 0;
-  // Clones the iterator object. Used for implementing copy semantics
-  // of ParamIterator<T>.
-  virtual ParamIteratorInterface* Clone() const = 0;
-  // Dereferences the current iterator and provides (read-only) access
-  // to the pointed value. It is the caller's responsibility not to call
-  // Current() on an iterator equal to BaseGenerator()->End().
-  // Used for implementing ParamGenerator<T>::operator*().
-  virtual const T* Current() const = 0;
-  // Determines whether the given iterator and other point to the same
-  // element in the sequence generated by the generator.
-  // Used for implementing ParamGenerator<T>::operator==().
-  virtual bool Equals(const ParamIteratorInterface& other) const = 0;
-};
-
-// Class iterating over elements provided by an implementation of
-// ParamGeneratorInterface<T>. It wraps ParamIteratorInterface<T>
-// and implements the const forward iterator concept.
-template <typename T>
-class ParamIterator {
- public:
-  typedef T value_type;
-  typedef const T& reference;
-  typedef ptrdiff_t difference_type;
-
-  // ParamIterator assumes ownership of the impl_ pointer.
-  ParamIterator(const ParamIterator& other) : impl_(other.impl_->Clone()) {}
-  ParamIterator& operator=(const ParamIterator& other) {
-    if (this != &other)
-      impl_.reset(other.impl_->Clone());
-    return *this;
-  }
-
-  const T& operator*() const { return *impl_->Current(); }
-  const T* operator->() const { return impl_->Current(); }
-  // Prefix version of operator++.
-  ParamIterator& operator++() {
-    impl_->Advance();
-    return *this;
-  }
-  // Postfix version of operator++.
-  ParamIterator operator++(int /*unused*/) {
-    ParamIteratorInterface<T>* clone = impl_->Clone();
-    impl_->Advance();
-    return ParamIterator(clone);
-  }
-  bool operator==(const ParamIterator& other) const {
-    return impl_.get() == other.impl_.get() || impl_->Equals(*other.impl_);
-  }
-  bool operator!=(const ParamIterator& other) const {
-    return !(*this == other);
-  }
-
- private:
-  friend class ParamGenerator<T>;
-  explicit ParamIterator(ParamIteratorInterface<T>* impl) : impl_(impl) {}
-  std::unique_ptr<ParamIteratorInterface<T> > impl_;
-};
-
-// ParamGeneratorInterface<T> is the binary interface to access generators
-// defined in other translation units.
-template <typename T>
-class ParamGeneratorInterface {
- public:
-  typedef T ParamType;
-
-  virtual ~ParamGeneratorInterface() {}
-
-  // Generator interface definition
-  virtual ParamIteratorInterface<T>* Begin() const = 0;
-  virtual ParamIteratorInterface<T>* End() const = 0;
-};
-
-// Wraps ParamGeneratorInterface<T> and provides general generator syntax
-// compatible with the STL Container concept.
-// This class implements copy initialization semantics and the contained
-// ParamGeneratorInterface<T> instance is shared among all copies
-// of the original object. This is possible because that instance is immutable.
-template<typename T>
-class ParamGenerator {
- public:
-  typedef ParamIterator<T> iterator;
-
-  explicit ParamGenerator(ParamGeneratorInterface<T>* impl) : impl_(impl) {}
-  ParamGenerator(const ParamGenerator& other) : impl_(other.impl_) {}
-
-  ParamGenerator& operator=(const ParamGenerator& other) {
-    impl_ = other.impl_;
-    return *this;
-  }
-
-  iterator begin() const { return iterator(impl_->Begin()); }
-  iterator end() const { return iterator(impl_->End()); }
-
- private:
-  std::shared_ptr<const ParamGeneratorInterface<T> > impl_;
-};
-
-// Generates values from a range of two comparable values. Can be used to
-// generate sequences of user-defined types that implement operator+() and
-// operator<().
-// This class is used in the Range() function.
-template <typename T, typename IncrementT>
-class RangeGenerator : public ParamGeneratorInterface<T> {
- public:
-  RangeGenerator(T begin, T end, IncrementT step)
-      : begin_(begin), end_(end),
-        step_(step), end_index_(CalculateEndIndex(begin, end, step)) {}
-  ~RangeGenerator() override {}
-
-  ParamIteratorInterface<T>* Begin() const override {
-    return new Iterator(this, begin_, 0, step_);
-  }
-  ParamIteratorInterface<T>* End() const override {
-    return new Iterator(this, end_, end_index_, step_);
-  }
-
- private:
-  class Iterator : public ParamIteratorInterface<T> {
-   public:
-    Iterator(const ParamGeneratorInterface<T>* base, T value, int index,
-             IncrementT step)
-        : base_(base), value_(value), index_(index), step_(step) {}
-    ~Iterator() override {}
-
-    const ParamGeneratorInterface<T>* BaseGenerator() const override {
-      return base_;
-    }
-    void Advance() override {
-      value_ = static_cast<T>(value_ + step_);
-      index_++;
-    }
-    ParamIteratorInterface<T>* Clone() const override {
-      return new Iterator(*this);
-    }
-    const T* Current() const override { return &value_; }
-    bool Equals(const ParamIteratorInterface<T>& other) const override {
-      // Having the same base generator guarantees that the other
-      // iterator is of the same type and we can downcast.
-      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
-          << "The program attempted to compare iterators "
-          << "from different generators." << std::endl;
-      const int other_index =
-          CheckedDowncastToActualType<const Iterator>(&other)->index_;
-      return index_ == other_index;
-    }
-
-   private:
-    Iterator(const Iterator& other)
-        : ParamIteratorInterface<T>(),
-          base_(other.base_), value_(other.value_), index_(other.index_),
-          step_(other.step_) {}
-
-    // No implementation - assignment is unsupported.
-    void operator=(const Iterator& other);
-
-    const ParamGeneratorInterface<T>* const base_;
-    T value_;
-    int index_;
-    const IncrementT step_;
-  };  // class RangeGenerator::Iterator
-
-  static int CalculateEndIndex(const T& begin,
-                               const T& end,
-                               const IncrementT& step) {
-    int end_index = 0;
-    for (T i = begin; i < end; i = static_cast<T>(i + step))
-      end_index++;
-    return end_index;
-  }
-
-  // No implementation - assignment is unsupported.
-  void operator=(const RangeGenerator& other);
-
-  const T begin_;
-  const T end_;
-  const IncrementT step_;
-  // The index for the end() iterator. All the elements in the generated
-  // sequence are indexed (0-based) to aid iterator comparison.
-  const int end_index_;
-};  // class RangeGenerator
-
-
-// Generates values from a pair of STL-style iterators. Used in the
-// ValuesIn() function. The elements are copied from the source range
-// since the source can be located on the stack, and the generator
-// is likely to persist beyond that stack frame.
-template <typename T>
-class ValuesInIteratorRangeGenerator : public ParamGeneratorInterface<T> {
- public:
-  template <typename ForwardIterator>
-  ValuesInIteratorRangeGenerator(ForwardIterator begin, ForwardIterator end)
-      : container_(begin, end) {}
-  ~ValuesInIteratorRangeGenerator() override {}
-
-  ParamIteratorInterface<T>* Begin() const override {
-    return new Iterator(this, container_.begin());
-  }
-  ParamIteratorInterface<T>* End() const override {
-    return new Iterator(this, container_.end());
-  }
-
- private:
-  typedef typename ::std::vector<T> ContainerType;
-
-  class Iterator : public ParamIteratorInterface<T> {
-   public:
-    Iterator(const ParamGeneratorInterface<T>* base,
-             typename ContainerType::const_iterator iterator)
-        : base_(base), iterator_(iterator) {}
-    ~Iterator() override {}
-
-    const ParamGeneratorInterface<T>* BaseGenerator() const override {
-      return base_;
-    }
-    void Advance() override {
-      ++iterator_;
-      value_.reset();
-    }
-    ParamIteratorInterface<T>* Clone() const override {
-      return new Iterator(*this);
-    }
-    // We need to use cached value referenced by iterator_ because *iterator_
-    // can return a temporary object (and of type other then T), so just
-    // having "return &*iterator_;" doesn't work.
-    // value_ is updated here and not in Advance() because Advance()
-    // can advance iterator_ beyond the end of the range, and we cannot
-    // detect that fact. The client code, on the other hand, is
-    // responsible for not calling Current() on an out-of-range iterator.
-    const T* Current() const override {
-      if (value_.get() == nullptr) value_.reset(new T(*iterator_));
-      return value_.get();
-    }
-    bool Equals(const ParamIteratorInterface<T>& other) const override {
-      // Having the same base generator guarantees that the other
-      // iterator is of the same type and we can downcast.
-      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
-          << "The program attempted to compare iterators "
-          << "from different generators." << std::endl;
-      return iterator_ ==
-          CheckedDowncastToActualType<const Iterator>(&other)->iterator_;
-    }
-
-   private:
-    Iterator(const Iterator& other)
-          // The explicit constructor call suppresses a false warning
-          // emitted by gcc when supplied with the -Wextra option.
-        : ParamIteratorInterface<T>(),
-          base_(other.base_),
-          iterator_(other.iterator_) {}
-
-    const ParamGeneratorInterface<T>* const base_;
-    typename ContainerType::const_iterator iterator_;
-    // A cached value of *iterator_. We keep it here to allow access by
-    // pointer in the wrapping iterator's operator->().
-    // value_ needs to be mutable to be accessed in Current().
-    // Use of std::unique_ptr helps manage cached value's lifetime,
-    // which is bound by the lifespan of the iterator itself.
-    mutable std::unique_ptr<const T> value_;
-  };  // class ValuesInIteratorRangeGenerator::Iterator
-
-  // No implementation - assignment is unsupported.
-  void operator=(const ValuesInIteratorRangeGenerator& other);
-
-  const ContainerType container_;
-};  // class ValuesInIteratorRangeGenerator
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Default parameterized test name generator, returns a string containing the
-// integer test parameter index.
-template <class ParamType>
-std::string DefaultParamName(const TestParamInfo<ParamType>& info) {
-  Message name_stream;
-  name_stream << info.index;
-  return name_stream.GetString();
-}
-
-template <typename T = int>
-void TestNotEmpty() {
-  static_assert(sizeof(T) == 0, "Empty arguments are not allowed.");
-}
-template <typename T = int>
-void TestNotEmpty(const T&) {}
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Stores a parameter value and later creates tests parameterized with that
-// value.
-template <class TestClass>
-class ParameterizedTestFactory : public TestFactoryBase {
- public:
-  typedef typename TestClass::ParamType ParamType;
-  explicit ParameterizedTestFactory(ParamType parameter) :
-      parameter_(parameter) {}
-  Test* CreateTest() override {
-    TestClass::SetParam(&parameter_);
-    return new TestClass();
-  }
-
- private:
-  const ParamType parameter_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestFactory);
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// TestMetaFactoryBase is a base class for meta-factories that create
-// test factories for passing into MakeAndRegisterTestInfo function.
-template <class ParamType>
-class TestMetaFactoryBase {
- public:
-  virtual ~TestMetaFactoryBase() {}
-
-  virtual TestFactoryBase* CreateTestFactory(ParamType parameter) = 0;
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// TestMetaFactory creates test factories for passing into
-// MakeAndRegisterTestInfo function. Since MakeAndRegisterTestInfo receives
-// ownership of test factory pointer, same factory object cannot be passed
-// into that method twice. But ParameterizedTestSuiteInfo is going to call
-// it for each Test/Parameter value combination. Thus it needs meta factory
-// creator class.
-template <class TestSuite>
-class TestMetaFactory
-    : public TestMetaFactoryBase<typename TestSuite::ParamType> {
- public:
-  using ParamType = typename TestSuite::ParamType;
-
-  TestMetaFactory() {}
-
-  TestFactoryBase* CreateTestFactory(ParamType parameter) override {
-    return new ParameterizedTestFactory<TestSuite>(parameter);
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestMetaFactory);
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// ParameterizedTestSuiteInfoBase is a generic interface
-// to ParameterizedTestSuiteInfo classes. ParameterizedTestSuiteInfoBase
-// accumulates test information provided by TEST_P macro invocations
-// and generators provided by INSTANTIATE_TEST_SUITE_P macro invocations
-// and uses that information to register all resulting test instances
-// in RegisterTests method. The ParameterizeTestSuiteRegistry class holds
-// a collection of pointers to the ParameterizedTestSuiteInfo objects
-// and calls RegisterTests() on each of them when asked.
-class ParameterizedTestSuiteInfoBase {
- public:
-  virtual ~ParameterizedTestSuiteInfoBase() {}
-
-  // Base part of test suite name for display purposes.
-  virtual const std::string& GetTestSuiteName() const = 0;
-  // Test suite id to verify identity.
-  virtual TypeId GetTestSuiteTypeId() const = 0;
-  // UnitTest class invokes this method to register tests in this
-  // test suite right before running them in RUN_ALL_TESTS macro.
-  // This method should not be called more than once on any single
-  // instance of a ParameterizedTestSuiteInfoBase derived class.
-  virtual void RegisterTests() = 0;
-
- protected:
-  ParameterizedTestSuiteInfoBase() {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfoBase);
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Report a the name of a test_suit as safe to ignore
-// as the side effect of construction of this type.
-struct MarkAsIgnored {
-  explicit MarkAsIgnored(const char* test_suite);
-};
-
-GTEST_API_ void InsertSyntheticTestCase(const std::string& name,
-                                        CodeLocation location, bool has_test_p);
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// ParameterizedTestSuiteInfo accumulates tests obtained from TEST_P
-// macro invocations for a particular test suite and generators
-// obtained from INSTANTIATE_TEST_SUITE_P macro invocations for that
-// test suite. It registers tests with all values generated by all
-// generators when asked.
-template <class TestSuite>
-class ParameterizedTestSuiteInfo : public ParameterizedTestSuiteInfoBase {
- public:
-  // ParamType and GeneratorCreationFunc are private types but are required
-  // for declarations of public methods AddTestPattern() and
-  // AddTestSuiteInstantiation().
-  using ParamType = typename TestSuite::ParamType;
-  // A function that returns an instance of appropriate generator type.
-  typedef ParamGenerator<ParamType>(GeneratorCreationFunc)();
-  using ParamNameGeneratorFunc = std::string(const TestParamInfo<ParamType>&);
-
-  explicit ParameterizedTestSuiteInfo(const char* name,
-                                      CodeLocation code_location)
-      : test_suite_name_(name), code_location_(code_location) {}
-
-  // Test suite base name for display purposes.
-  const std::string& GetTestSuiteName() const override {
-    return test_suite_name_;
-  }
-  // Test suite id to verify identity.
-  TypeId GetTestSuiteTypeId() const override { return GetTypeId<TestSuite>(); }
-  // TEST_P macro uses AddTestPattern() to record information
-  // about a single test in a LocalTestInfo structure.
-  // test_suite_name is the base name of the test suite (without invocation
-  // prefix). test_base_name is the name of an individual test without
-  // parameter index. For the test SequenceA/FooTest.DoBar/1 FooTest is
-  // test suite base name and DoBar is test base name.
-  void AddTestPattern(const char* test_suite_name, const char* test_base_name,
-                      TestMetaFactoryBase<ParamType>* meta_factory,
-                      CodeLocation code_location) {
-    tests_.push_back(std::shared_ptr<TestInfo>(new TestInfo(
-        test_suite_name, test_base_name, meta_factory, code_location)));
-  }
-  // INSTANTIATE_TEST_SUITE_P macro uses AddGenerator() to record information
-  // about a generator.
-  int AddTestSuiteInstantiation(const std::string& instantiation_name,
-                                GeneratorCreationFunc* func,
-                                ParamNameGeneratorFunc* name_func,
-                                const char* file, int line) {
-    instantiations_.push_back(
-        InstantiationInfo(instantiation_name, func, name_func, file, line));
-    return 0;  // Return value used only to run this method in namespace scope.
-  }
-  // UnitTest class invokes this method to register tests in this test suite
-  // right before running tests in RUN_ALL_TESTS macro.
-  // This method should not be called more than once on any single
-  // instance of a ParameterizedTestSuiteInfoBase derived class.
-  // UnitTest has a guard to prevent from calling this method more than once.
-  void RegisterTests() override {
-    bool generated_instantiations = false;
-
-    for (typename TestInfoContainer::iterator test_it = tests_.begin();
-         test_it != tests_.end(); ++test_it) {
-      std::shared_ptr<TestInfo> test_info = *test_it;
-      for (typename InstantiationContainer::iterator gen_it =
-               instantiations_.begin(); gen_it != instantiations_.end();
-               ++gen_it) {
-        const std::string& instantiation_name = gen_it->name;
-        ParamGenerator<ParamType> generator((*gen_it->generator)());
-        ParamNameGeneratorFunc* name_func = gen_it->name_func;
-        const char* file = gen_it->file;
-        int line = gen_it->line;
-
-        std::string test_suite_name;
-        if ( !instantiation_name.empty() )
-          test_suite_name = instantiation_name + "/";
-        test_suite_name += test_info->test_suite_base_name;
-
-        size_t i = 0;
-        std::set<std::string> test_param_names;
-        for (typename ParamGenerator<ParamType>::iterator param_it =
-                 generator.begin();
-             param_it != generator.end(); ++param_it, ++i) {
-          generated_instantiations = true;
-
-          Message test_name_stream;
-
-          std::string param_name = name_func(
-              TestParamInfo<ParamType>(*param_it, i));
-
-          GTEST_CHECK_(IsValidParamName(param_name))
-              << "Parameterized test name '" << param_name
-              << "' is invalid, in " << file
-              << " line " << line << std::endl;
-
-          GTEST_CHECK_(test_param_names.count(param_name) == 0)
-              << "Duplicate parameterized test name '" << param_name
-              << "', in " << file << " line " << line << std::endl;
-
-          test_param_names.insert(param_name);
-
-          if (!test_info->test_base_name.empty()) {
-            test_name_stream << test_info->test_base_name << "/";
-          }
-          test_name_stream << param_name;
-          MakeAndRegisterTestInfo(
-              test_suite_name.c_str(), test_name_stream.GetString().c_str(),
-              nullptr,  // No type parameter.
-              PrintToString(*param_it).c_str(), test_info->code_location,
-              GetTestSuiteTypeId(),
-              SuiteApiResolver<TestSuite>::GetSetUpCaseOrSuite(file, line),
-              SuiteApiResolver<TestSuite>::GetTearDownCaseOrSuite(file, line),
-              test_info->test_meta_factory->CreateTestFactory(*param_it));
-        }  // for param_it
-      }  // for gen_it
-    }  // for test_it
-
-    if (!generated_instantiations) {
-      // There are no generaotrs, or they all generate nothing ...
-      InsertSyntheticTestCase(GetTestSuiteName(), code_location_,
-                              !tests_.empty());
-    }
-  }    // RegisterTests
-
- private:
-  // LocalTestInfo structure keeps information about a single test registered
-  // with TEST_P macro.
-  struct TestInfo {
-    TestInfo(const char* a_test_suite_base_name, const char* a_test_base_name,
-             TestMetaFactoryBase<ParamType>* a_test_meta_factory,
-             CodeLocation a_code_location)
-        : test_suite_base_name(a_test_suite_base_name),
-          test_base_name(a_test_base_name),
-          test_meta_factory(a_test_meta_factory),
-          code_location(a_code_location) {}
-
-    const std::string test_suite_base_name;
-    const std::string test_base_name;
-    const std::unique_ptr<TestMetaFactoryBase<ParamType> > test_meta_factory;
-    const CodeLocation code_location;
-  };
-  using TestInfoContainer = ::std::vector<std::shared_ptr<TestInfo> >;
-  // Records data received from INSTANTIATE_TEST_SUITE_P macros:
-  //  <Instantiation name, Sequence generator creation function,
-  //     Name generator function, Source file, Source line>
-  struct InstantiationInfo {
-      InstantiationInfo(const std::string &name_in,
-                        GeneratorCreationFunc* generator_in,
-                        ParamNameGeneratorFunc* name_func_in,
-                        const char* file_in,
-                        int line_in)
-          : name(name_in),
-            generator(generator_in),
-            name_func(name_func_in),
-            file(file_in),
-            line(line_in) {}
-
-      std::string name;
-      GeneratorCreationFunc* generator;
-      ParamNameGeneratorFunc* name_func;
-      const char* file;
-      int line;
-  };
-  typedef ::std::vector<InstantiationInfo> InstantiationContainer;
-
-  static bool IsValidParamName(const std::string& name) {
-    // Check for empty string
-    if (name.empty())
-      return false;
-
-    // Check for invalid characters
-    for (std::string::size_type index = 0; index < name.size(); ++index) {
-      if (!isalnum(name[index]) && name[index] != '_')
-        return false;
-    }
-
-    return true;
-  }
-
-  const std::string test_suite_name_;
-  CodeLocation code_location_;
-  TestInfoContainer tests_;
-  InstantiationContainer instantiations_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfo);
-};  // class ParameterizedTestSuiteInfo
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-template <class TestCase>
-using ParameterizedTestCaseInfo = ParameterizedTestSuiteInfo<TestCase>;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// ParameterizedTestSuiteRegistry contains a map of
-// ParameterizedTestSuiteInfoBase classes accessed by test suite names. TEST_P
-// and INSTANTIATE_TEST_SUITE_P macros use it to locate their corresponding
-// ParameterizedTestSuiteInfo descriptors.
-class ParameterizedTestSuiteRegistry {
- public:
-  ParameterizedTestSuiteRegistry() {}
-  ~ParameterizedTestSuiteRegistry() {
-    for (auto& test_suite_info : test_suite_infos_) {
-      delete test_suite_info;
-    }
-  }
-
-  // Looks up or creates and returns a structure containing information about
-  // tests and instantiations of a particular test suite.
-  template <class TestSuite>
-  ParameterizedTestSuiteInfo<TestSuite>* GetTestSuitePatternHolder(
-      const char* test_suite_name, CodeLocation code_location) {
-    ParameterizedTestSuiteInfo<TestSuite>* typed_test_info = nullptr;
-    for (auto& test_suite_info : test_suite_infos_) {
-      if (test_suite_info->GetTestSuiteName() == test_suite_name) {
-        if (test_suite_info->GetTestSuiteTypeId() != GetTypeId<TestSuite>()) {
-          // Complain about incorrect usage of Google Test facilities
-          // and terminate the program since we cannot guaranty correct
-          // test suite setup and tear-down in this case.
-          ReportInvalidTestSuiteType(test_suite_name, code_location);
-          posix::Abort();
-        } else {
-          // At this point we are sure that the object we found is of the same
-          // type we are looking for, so we downcast it to that type
-          // without further checks.
-          typed_test_info = CheckedDowncastToActualType<
-              ParameterizedTestSuiteInfo<TestSuite> >(test_suite_info);
-        }
-        break;
-      }
-    }
-    if (typed_test_info == nullptr) {
-      typed_test_info = new ParameterizedTestSuiteInfo<TestSuite>(
-          test_suite_name, code_location);
-      test_suite_infos_.push_back(typed_test_info);
-    }
-    return typed_test_info;
-  }
-  void RegisterTests() {
-    for (auto& test_suite_info : test_suite_infos_) {
-      test_suite_info->RegisterTests();
-    }
-  }
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  template <class TestCase>
-  ParameterizedTestCaseInfo<TestCase>* GetTestCasePatternHolder(
-      const char* test_case_name, CodeLocation code_location) {
-    return GetTestSuitePatternHolder<TestCase>(test_case_name, code_location);
-  }
-
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
- private:
-  using TestSuiteInfoContainer = ::std::vector<ParameterizedTestSuiteInfoBase*>;
-
-  TestSuiteInfoContainer test_suite_infos_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteRegistry);
-};
-
-// Keep track of what type-parameterized test suite are defined and
-// where as well as which are intatiated. This allows susequently
-// identifying suits that are defined but never used.
-class TypeParameterizedTestSuiteRegistry {
- public:
-  // Add a suite definition
-  void RegisterTestSuite(const char* test_suite_name,
-                         CodeLocation code_location);
-
-  // Add an instantiation of a suit.
-  void RegisterInstantiation(const char* test_suite_name);
-
-  // For each suit repored as defined but not reported as instantiation,
-  // emit a test that reports that fact (configurably, as an error).
-  void CheckForInstantiations();
-
- private:
-  struct TypeParameterizedTestSuiteInfo {
-    explicit TypeParameterizedTestSuiteInfo(CodeLocation c)
-        : code_location(c), instantiated(false) {}
-
-    CodeLocation code_location;
-    bool instantiated;
-  };
-
-  std::map<std::string, TypeParameterizedTestSuiteInfo> suites_;
-};
-
-}  // namespace internal
-
-// Forward declarations of ValuesIn(), which is implemented in
-// include/gtest/gtest-param-test.h.
-template <class Container>
-internal::ParamGenerator<typename Container::value_type> ValuesIn(
-    const Container& container);
-
-namespace internal {
-// Used in the Values() function to provide polymorphic capabilities.
-
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4100)
-#endif
-
-template <typename... Ts>
-class ValueArray {
- public:
-  explicit ValueArray(Ts... v) : v_(FlatTupleConstructTag{}, std::move(v)...) {}
-
-  template <typename T>
-  operator ParamGenerator<T>() const {  // NOLINT
-    return ValuesIn(MakeVector<T>(MakeIndexSequence<sizeof...(Ts)>()));
-  }
-
- private:
-  template <typename T, size_t... I>
-  std::vector<T> MakeVector(IndexSequence<I...>) const {
-    return std::vector<T>{static_cast<T>(v_.template Get<I>())...};
-  }
-
-  FlatTuple<Ts...> v_;
-};
-
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif
-
-template <typename... T>
-class CartesianProductGenerator
-    : public ParamGeneratorInterface<::std::tuple<T...>> {
- public:
-  typedef ::std::tuple<T...> ParamType;
-
-  CartesianProductGenerator(const std::tuple<ParamGenerator<T>...>& g)
-      : generators_(g) {}
-  ~CartesianProductGenerator() override {}
-
-  ParamIteratorInterface<ParamType>* Begin() const override {
-    return new Iterator(this, generators_, false);
-  }
-  ParamIteratorInterface<ParamType>* End() const override {
-    return new Iterator(this, generators_, true);
-  }
-
- private:
-  template <class I>
-  class IteratorImpl;
-  template <size_t... I>
-  class IteratorImpl<IndexSequence<I...>>
-      : public ParamIteratorInterface<ParamType> {
-   public:
-    IteratorImpl(const ParamGeneratorInterface<ParamType>* base,
-             const std::tuple<ParamGenerator<T>...>& generators, bool is_end)
-        : base_(base),
-          begin_(std::get<I>(generators).begin()...),
-          end_(std::get<I>(generators).end()...),
-          current_(is_end ? end_ : begin_) {
-      ComputeCurrentValue();
-    }
-    ~IteratorImpl() override {}
-
-    const ParamGeneratorInterface<ParamType>* BaseGenerator() const override {
-      return base_;
-    }
-    // Advance should not be called on beyond-of-range iterators
-    // so no component iterators must be beyond end of range, either.
-    void Advance() override {
-      assert(!AtEnd());
-      // Advance the last iterator.
-      ++std::get<sizeof...(T) - 1>(current_);
-      // if that reaches end, propagate that up.
-      AdvanceIfEnd<sizeof...(T) - 1>();
-      ComputeCurrentValue();
-    }
-    ParamIteratorInterface<ParamType>* Clone() const override {
-      return new IteratorImpl(*this);
-    }
-
-    const ParamType* Current() const override { return current_value_.get(); }
-
-    bool Equals(const ParamIteratorInterface<ParamType>& other) const override {
-      // Having the same base generator guarantees that the other
-      // iterator is of the same type and we can downcast.
-      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
-          << "The program attempted to compare iterators "
-          << "from different generators." << std::endl;
-      const IteratorImpl* typed_other =
-          CheckedDowncastToActualType<const IteratorImpl>(&other);
-
-      // We must report iterators equal if they both point beyond their
-      // respective ranges. That can happen in a variety of fashions,
-      // so we have to consult AtEnd().
-      if (AtEnd() && typed_other->AtEnd()) return true;
-
-      bool same = true;
-      bool dummy[] = {
-          (same = same && std::get<I>(current_) ==
-                              std::get<I>(typed_other->current_))...};
-      (void)dummy;
-      return same;
-    }
-
-   private:
-    template <size_t ThisI>
-    void AdvanceIfEnd() {
-      if (std::get<ThisI>(current_) != std::get<ThisI>(end_)) return;
-
-      bool last = ThisI == 0;
-      if (last) {
-        // We are done. Nothing else to propagate.
-        return;
-      }
-
-      constexpr size_t NextI = ThisI - (ThisI != 0);
-      std::get<ThisI>(current_) = std::get<ThisI>(begin_);
-      ++std::get<NextI>(current_);
-      AdvanceIfEnd<NextI>();
-    }
-
-    void ComputeCurrentValue() {
-      if (!AtEnd())
-        current_value_ = std::make_shared<ParamType>(*std::get<I>(current_)...);
-    }
-    bool AtEnd() const {
-      bool at_end = false;
-      bool dummy[] = {
-          (at_end = at_end || std::get<I>(current_) == std::get<I>(end_))...};
-      (void)dummy;
-      return at_end;
-    }
-
-    const ParamGeneratorInterface<ParamType>* const base_;
-    std::tuple<typename ParamGenerator<T>::iterator...> begin_;
-    std::tuple<typename ParamGenerator<T>::iterator...> end_;
-    std::tuple<typename ParamGenerator<T>::iterator...> current_;
-    std::shared_ptr<ParamType> current_value_;
-  };
-
-  using Iterator = IteratorImpl<typename MakeIndexSequence<sizeof...(T)>::type>;
-
-  std::tuple<ParamGenerator<T>...> generators_;
-};
-
-template <class... Gen>
-class CartesianProductHolder {
- public:
-  CartesianProductHolder(const Gen&... g) : generators_(g...) {}
-  template <typename... T>
-  operator ParamGenerator<::std::tuple<T...>>() const {
-    return ParamGenerator<::std::tuple<T...>>(
-        new CartesianProductGenerator<T...>(generators_));
-  }
-
- private:
-  std::tuple<Gen...> generators_;
-};
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
-
-namespace testing {
-
-// Functions producing parameter generators.
-//
-// Google Test uses these generators to produce parameters for value-
-// parameterized tests. When a parameterized test suite is instantiated
-// with a particular generator, Google Test creates and runs tests
-// for each element in the sequence produced by the generator.
-//
-// In the following sample, tests from test suite FooTest are instantiated
-// each three times with parameter values 3, 5, and 8:
-//
-// class FooTest : public TestWithParam<int> { ... };
-//
-// TEST_P(FooTest, TestThis) {
-// }
-// TEST_P(FooTest, TestThat) {
-// }
-// INSTANTIATE_TEST_SUITE_P(TestSequence, FooTest, Values(3, 5, 8));
-//
-
-// Range() returns generators providing sequences of values in a range.
-//
-// Synopsis:
-// Range(start, end)
-//   - returns a generator producing a sequence of values {start, start+1,
-//     start+2, ..., }.
-// Range(start, end, step)
-//   - returns a generator producing a sequence of values {start, start+step,
-//     start+step+step, ..., }.
-// Notes:
-//   * The generated sequences never include end. For example, Range(1, 5)
-//     returns a generator producing a sequence {1, 2, 3, 4}. Range(1, 9, 2)
-//     returns a generator producing {1, 3, 5, 7}.
-//   * start and end must have the same type. That type may be any integral or
-//     floating-point type or a user defined type satisfying these conditions:
-//     * It must be assignable (have operator=() defined).
-//     * It must have operator+() (operator+(int-compatible type) for
-//       two-operand version).
-//     * It must have operator<() defined.
-//     Elements in the resulting sequences will also have that type.
-//   * Condition start < end must be satisfied in order for resulting sequences
-//     to contain any elements.
-//
-template <typename T, typename IncrementT>
-internal::ParamGenerator<T> Range(T start, T end, IncrementT step) {
-  return internal::ParamGenerator<T>(
-      new internal::RangeGenerator<T, IncrementT>(start, end, step));
-}
-
-template <typename T>
-internal::ParamGenerator<T> Range(T start, T end) {
-  return Range(start, end, 1);
-}
-
-// ValuesIn() function allows generation of tests with parameters coming from
-// a container.
-//
-// Synopsis:
-// ValuesIn(const T (&array)[N])
-//   - returns a generator producing sequences with elements from
-//     a C-style array.
-// ValuesIn(const Container& container)
-//   - returns a generator producing sequences with elements from
-//     an STL-style container.
-// ValuesIn(Iterator begin, Iterator end)
-//   - returns a generator producing sequences with elements from
-//     a range [begin, end) defined by a pair of STL-style iterators. These
-//     iterators can also be plain C pointers.
-//
-// Please note that ValuesIn copies the values from the containers
-// passed in and keeps them to generate tests in RUN_ALL_TESTS().
-//
-// Examples:
-//
-// This instantiates tests from test suite StringTest
-// each with C-string values of "foo", "bar", and "baz":
-//
-// const char* strings[] = {"foo", "bar", "baz"};
-// INSTANTIATE_TEST_SUITE_P(StringSequence, StringTest, ValuesIn(strings));
-//
-// This instantiates tests from test suite StlStringTest
-// each with STL strings with values "a" and "b":
-//
-// ::std::vector< ::std::string> GetParameterStrings() {
-//   ::std::vector< ::std::string> v;
-//   v.push_back("a");
-//   v.push_back("b");
-//   return v;
-// }
-//
-// INSTANTIATE_TEST_SUITE_P(CharSequence,
-//                          StlStringTest,
-//                          ValuesIn(GetParameterStrings()));
-//
-//
-// This will also instantiate tests from CharTest
-// each with parameter values 'a' and 'b':
-//
-// ::std::list<char> GetParameterChars() {
-//   ::std::list<char> list;
-//   list.push_back('a');
-//   list.push_back('b');
-//   return list;
-// }
-// ::std::list<char> l = GetParameterChars();
-// INSTANTIATE_TEST_SUITE_P(CharSequence2,
-//                          CharTest,
-//                          ValuesIn(l.begin(), l.end()));
-//
-template <typename ForwardIterator>
-internal::ParamGenerator<
-    typename std::iterator_traits<ForwardIterator>::value_type>
-ValuesIn(ForwardIterator begin, ForwardIterator end) {
-  typedef typename std::iterator_traits<ForwardIterator>::value_type ParamType;
-  return internal::ParamGenerator<ParamType>(
-      new internal::ValuesInIteratorRangeGenerator<ParamType>(begin, end));
-}
-
-template <typename T, size_t N>
-internal::ParamGenerator<T> ValuesIn(const T (&array)[N]) {
-  return ValuesIn(array, array + N);
-}
-
-template <class Container>
-internal::ParamGenerator<typename Container::value_type> ValuesIn(
-    const Container& container) {
-  return ValuesIn(container.begin(), container.end());
-}
-
-// Values() allows generating tests from explicitly specified list of
-// parameters.
-//
-// Synopsis:
-// Values(T v1, T v2, ..., T vN)
-//   - returns a generator producing sequences with elements v1, v2, ..., vN.
-//
-// For example, this instantiates tests from test suite BarTest each
-// with values "one", "two", and "three":
-//
-// INSTANTIATE_TEST_SUITE_P(NumSequence,
-//                          BarTest,
-//                          Values("one", "two", "three"));
-//
-// This instantiates tests from test suite BazTest each with values 1, 2, 3.5.
-// The exact type of values will depend on the type of parameter in BazTest.
-//
-// INSTANTIATE_TEST_SUITE_P(FloatingNumbers, BazTest, Values(1, 2, 3.5));
-//
-//
-template <typename... T>
-internal::ValueArray<T...> Values(T... v) {
-  return internal::ValueArray<T...>(std::move(v)...);
-}
-
-// Bool() allows generating tests with parameters in a set of (false, true).
-//
-// Synopsis:
-// Bool()
-//   - returns a generator producing sequences with elements {false, true}.
-//
-// It is useful when testing code that depends on Boolean flags. Combinations
-// of multiple flags can be tested when several Bool()'s are combined using
-// Combine() function.
-//
-// In the following example all tests in the test suite FlagDependentTest
-// will be instantiated twice with parameters false and true.
-//
-// class FlagDependentTest : public testing::TestWithParam<bool> {
-//   virtual void SetUp() {
-//     external_flag = GetParam();
-//   }
-// }
-// INSTANTIATE_TEST_SUITE_P(BoolSequence, FlagDependentTest, Bool());
-//
-inline internal::ParamGenerator<bool> Bool() {
-  return Values(false, true);
-}
-
-// Combine() allows the user to combine two or more sequences to produce
-// values of a Cartesian product of those sequences' elements.
-//
-// Synopsis:
-// Combine(gen1, gen2, ..., genN)
-//   - returns a generator producing sequences with elements coming from
-//     the Cartesian product of elements from the sequences generated by
-//     gen1, gen2, ..., genN. The sequence elements will have a type of
-//     std::tuple<T1, T2, ..., TN> where T1, T2, ..., TN are the types
-//     of elements from sequences produces by gen1, gen2, ..., genN.
-//
-// Example:
-//
-// This will instantiate tests in test suite AnimalTest each one with
-// the parameter values tuple("cat", BLACK), tuple("cat", WHITE),
-// tuple("dog", BLACK), and tuple("dog", WHITE):
-//
-// enum Color { BLACK, GRAY, WHITE };
-// class AnimalTest
-//     : public testing::TestWithParam<std::tuple<const char*, Color> > {...};
-//
-// TEST_P(AnimalTest, AnimalLooksNice) {...}
-//
-// INSTANTIATE_TEST_SUITE_P(AnimalVariations, AnimalTest,
-//                          Combine(Values("cat", "dog"),
-//                                  Values(BLACK, WHITE)));
-//
-// This will instantiate tests in FlagDependentTest with all variations of two
-// Boolean flags:
-//
-// class FlagDependentTest
-//     : public testing::TestWithParam<std::tuple<bool, bool> > {
-//   virtual void SetUp() {
-//     // Assigns external_flag_1 and external_flag_2 values from the tuple.
-//     std::tie(external_flag_1, external_flag_2) = GetParam();
-//   }
-// };
-//
-// TEST_P(FlagDependentTest, TestFeature1) {
-//   // Test your code using external_flag_1 and external_flag_2 here.
-// }
-// INSTANTIATE_TEST_SUITE_P(TwoBoolSequence, FlagDependentTest,
-//                          Combine(Bool(), Bool()));
-//
-template <typename... Generator>
-internal::CartesianProductHolder<Generator...> Combine(const Generator&... g) {
-  return internal::CartesianProductHolder<Generator...>(g...);
-}
-
-#define TEST_P(test_suite_name, test_name)                                     \
-  class GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)                     \
-      : public test_suite_name {                                               \
-   public:                                                                     \
-    GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() {}                    \
-    void TestBody() override;                                                  \
-                                                                               \
-   private:                                                                    \
-    static int AddToRegistry() {                                               \
-      ::testing::UnitTest::GetInstance()                                       \
-          ->parameterized_test_registry()                                      \
-          .GetTestSuitePatternHolder<test_suite_name>(                         \
-              GTEST_STRINGIFY_(test_suite_name),                               \
-              ::testing::internal::CodeLocation(__FILE__, __LINE__))           \
-          ->AddTestPattern(                                                    \
-              GTEST_STRINGIFY_(test_suite_name), GTEST_STRINGIFY_(test_name),  \
-              new ::testing::internal::TestMetaFactory<GTEST_TEST_CLASS_NAME_( \
-                  test_suite_name, test_name)>(),                              \
-              ::testing::internal::CodeLocation(__FILE__, __LINE__));          \
-      return 0;                                                                \
-    }                                                                          \
-    static int gtest_registering_dummy_ GTEST_ATTRIBUTE_UNUSED_;               \
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name,    \
-                                                           test_name));        \
-  };                                                                           \
-  int GTEST_TEST_CLASS_NAME_(test_suite_name,                                  \
-                             test_name)::gtest_registering_dummy_ =            \
-      GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::AddToRegistry();     \
-  void GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::TestBody()
-
-// The last argument to INSTANTIATE_TEST_SUITE_P allows the user to specify
-// generator and an optional function or functor that generates custom test name
-// suffixes based on the test parameters. Such a function or functor should
-// accept one argument of type testing::TestParamInfo<class ParamType>, and
-// return std::string.
-//
-// testing::PrintToStringParamName is a builtin test suffix generator that
-// returns the value of testing::PrintToString(GetParam()).
-//
-// Note: test names must be non-empty, unique, and may only contain ASCII
-// alphanumeric characters or underscore. Because PrintToString adds quotes
-// to std::string and C strings, it won't work for these types.
-
-#define GTEST_EXPAND_(arg) arg
-#define GTEST_GET_FIRST_(first, ...) first
-#define GTEST_GET_SECOND_(first, second, ...) second
-
-#define INSTANTIATE_TEST_SUITE_P(prefix, test_suite_name, ...)                \
-  static ::testing::internal::ParamGenerator<test_suite_name::ParamType>      \
-      gtest_##prefix##test_suite_name##_EvalGenerator_() {                    \
-    return GTEST_EXPAND_(GTEST_GET_FIRST_(__VA_ARGS__, DUMMY_PARAM_));        \
-  }                                                                           \
-  static ::std::string gtest_##prefix##test_suite_name##_EvalGenerateName_(   \
-      const ::testing::TestParamInfo<test_suite_name::ParamType>& info) {     \
-    if (::testing::internal::AlwaysFalse()) {                                 \
-      ::testing::internal::TestNotEmpty(GTEST_EXPAND_(GTEST_GET_SECOND_(      \
-          __VA_ARGS__,                                                        \
-          ::testing::internal::DefaultParamName<test_suite_name::ParamType>,  \
-          DUMMY_PARAM_)));                                                    \
-      auto t = std::make_tuple(__VA_ARGS__);                                  \
-      static_assert(std::tuple_size<decltype(t)>::value <= 2,                 \
-                    "Too Many Args!");                                        \
-    }                                                                         \
-    return ((GTEST_EXPAND_(GTEST_GET_SECOND_(                                 \
-        __VA_ARGS__,                                                          \
-        ::testing::internal::DefaultParamName<test_suite_name::ParamType>,    \
-        DUMMY_PARAM_))))(info);                                               \
-  }                                                                           \
-  static int gtest_##prefix##test_suite_name##_dummy_                         \
-      GTEST_ATTRIBUTE_UNUSED_ =                                               \
-          ::testing::UnitTest::GetInstance()                                  \
-              ->parameterized_test_registry()                                 \
-              .GetTestSuitePatternHolder<test_suite_name>(                    \
-                  GTEST_STRINGIFY_(test_suite_name),                          \
-                  ::testing::internal::CodeLocation(__FILE__, __LINE__))      \
-              ->AddTestSuiteInstantiation(                                    \
-                  GTEST_STRINGIFY_(prefix),                                   \
-                  &gtest_##prefix##test_suite_name##_EvalGenerator_,          \
-                  &gtest_##prefix##test_suite_name##_EvalGenerateName_,       \
-                  __FILE__, __LINE__)
-
-
-// Allow Marking a Parameterized test class as not needing to be instantiated.
-#define GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(T)                   \
-  namespace gtest_do_not_use_outside_namespace_scope {}                   \
-  static const ::testing::internal::MarkAsIgnored gtest_allow_ignore_##T( \
-      GTEST_STRINGIFY_(T))
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define INSTANTIATE_TEST_CASE_P                                            \
-  static_assert(::testing::internal::InstantiateTestCase_P_IsDeprecated(), \
-                "");                                                       \
-  INSTANTIATE_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Google C++ Testing and Mocking Framework definitions useful in production code.
-// GOOGLETEST_CM0003 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PROD_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_PROD_H_
-
-// When you need to test the private or protected members of a class,
-// use the FRIEND_TEST macro to declare your tests as friends of the
-// class.  For example:
-//
-// class MyClass {
-//  private:
-//   void PrivateMethod();
-//   FRIEND_TEST(MyClassTest, PrivateMethodWorks);
-// };
-//
-// class MyClassTest : public testing::Test {
-//   // ...
-// };
-//
-// TEST_F(MyClassTest, PrivateMethodWorks) {
-//   // Can call MyClass::PrivateMethod() here.
-// }
-//
-// Note: The test class must be in the same namespace as the class being tested.
-// For example, putting MyClassTest in an anonymous namespace will not work.
-
-#define FRIEND_TEST(test_case_name, test_name)\
-friend class test_case_name##_##test_name##_Test
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PROD_H_
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
-
-// This header implements typed tests and type-parameterized tests.
-
-// Typed (aka type-driven) tests repeat the same test for types in a
-// list.  You must know which types you want to test with when writing
-// typed tests. Here's how you do it:
-
-#if 0
-
-// First, define a fixture class template.  It should be parameterized
-// by a type.  Remember to derive it from testing::Test.
-template <typename T>
-class FooTest : public testing::Test {
- public:
-  ...
-  typedef std::list<T> List;
-  static T shared_;
-  T value_;
-};
-
-// Next, associate a list of types with the test suite, which will be
-// repeated for each type in the list.  The typedef is necessary for
-// the macro to parse correctly.
-typedef testing::Types<char, int, unsigned int> MyTypes;
-TYPED_TEST_SUITE(FooTest, MyTypes);
-
-// If the type list contains only one type, you can write that type
-// directly without Types<...>:
-//   TYPED_TEST_SUITE(FooTest, int);
-
-// Then, use TYPED_TEST() instead of TEST_F() to define as many typed
-// tests for this test suite as you want.
-TYPED_TEST(FooTest, DoesBlah) {
-  // Inside a test, refer to the special name TypeParam to get the type
-  // parameter.  Since we are inside a derived class template, C++ requires
-  // us to visit the members of FooTest via 'this'.
-  TypeParam n = this->value_;
-
-  // To visit static members of the fixture, add the TestFixture::
-  // prefix.
-  n += TestFixture::shared_;
-
-  // To refer to typedefs in the fixture, add the "typename
-  // TestFixture::" prefix.
-  typename TestFixture::List values;
-  values.push_back(n);
-  ...
-}
-
-TYPED_TEST(FooTest, HasPropertyA) { ... }
-
-// TYPED_TEST_SUITE takes an optional third argument which allows to specify a
-// class that generates custom test name suffixes based on the type. This should
-// be a class which has a static template function GetName(int index) returning
-// a string for each type. The provided integer index equals the index of the
-// type in the provided type list. In many cases the index can be ignored.
-//
-// For example:
-//   class MyTypeNames {
-//    public:
-//     template <typename T>
-//     static std::string GetName(int) {
-//       if (std::is_same<T, char>()) return "char";
-//       if (std::is_same<T, int>()) return "int";
-//       if (std::is_same<T, unsigned int>()) return "unsignedInt";
-//     }
-//   };
-//   TYPED_TEST_SUITE(FooTest, MyTypes, MyTypeNames);
-
-#endif  // 0
-
-// Type-parameterized tests are abstract test patterns parameterized
-// by a type.  Compared with typed tests, type-parameterized tests
-// allow you to define the test pattern without knowing what the type
-// parameters are.  The defined pattern can be instantiated with
-// different types any number of times, in any number of translation
-// units.
-//
-// If you are designing an interface or concept, you can define a
-// suite of type-parameterized tests to verify properties that any
-// valid implementation of the interface/concept should have.  Then,
-// each implementation can easily instantiate the test suite to verify
-// that it conforms to the requirements, without having to write
-// similar tests repeatedly.  Here's an example:
-
-#if 0
-
-// First, define a fixture class template.  It should be parameterized
-// by a type.  Remember to derive it from testing::Test.
-template <typename T>
-class FooTest : public testing::Test {
-  ...
-};
-
-// Next, declare that you will define a type-parameterized test suite
-// (the _P suffix is for "parameterized" or "pattern", whichever you
-// prefer):
-TYPED_TEST_SUITE_P(FooTest);
-
-// Then, use TYPED_TEST_P() to define as many type-parameterized tests
-// for this type-parameterized test suite as you want.
-TYPED_TEST_P(FooTest, DoesBlah) {
-  // Inside a test, refer to TypeParam to get the type parameter.
-  TypeParam n = 0;
-  ...
-}
-
-TYPED_TEST_P(FooTest, HasPropertyA) { ... }
-
-// Now the tricky part: you need to register all test patterns before
-// you can instantiate them.  The first argument of the macro is the
-// test suite name; the rest are the names of the tests in this test
-// case.
-REGISTER_TYPED_TEST_SUITE_P(FooTest,
-                            DoesBlah, HasPropertyA);
-
-// Finally, you are free to instantiate the pattern with the types you
-// want.  If you put the above code in a header file, you can #include
-// it in multiple C++ source files and instantiate it multiple times.
-//
-// To distinguish different instances of the pattern, the first
-// argument to the INSTANTIATE_* macro is a prefix that will be added
-// to the actual test suite name.  Remember to pick unique prefixes for
-// different instances.
-typedef testing::Types<char, int, unsigned int> MyTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes);
-
-// If the type list contains only one type, you can write that type
-// directly without Types<...>:
-//   INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, int);
-//
-// Similar to the optional argument of TYPED_TEST_SUITE above,
-// INSTANTIATE_TEST_SUITE_P takes an optional fourth argument which allows to
-// generate custom names.
-//   INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes, MyTypeNames);
-
-#endif  // 0
-
-
-// Implements typed tests.
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Expands to the name of the typedef for the type parameters of the
-// given test suite.
-#define GTEST_TYPE_PARAMS_(TestSuiteName) gtest_type_params_##TestSuiteName##_
-
-// Expands to the name of the typedef for the NameGenerator, responsible for
-// creating the suffixes of the name.
-#define GTEST_NAME_GENERATOR_(TestSuiteName) \
-  gtest_type_params_##TestSuiteName##_NameGenerator
-
-#define TYPED_TEST_SUITE(CaseName, Types, ...)                          \
-  typedef ::testing::internal::GenerateTypeList<Types>::type            \
-      GTEST_TYPE_PARAMS_(CaseName);                                     \
-  typedef ::testing::internal::NameGeneratorSelector<__VA_ARGS__>::type \
-      GTEST_NAME_GENERATOR_(CaseName)
-
-#define TYPED_TEST(CaseName, TestName)                                        \
-  static_assert(sizeof(GTEST_STRINGIFY_(TestName)) > 1,                       \
-                "test-name must not be empty");                               \
-  template <typename gtest_TypeParam_>                                        \
-  class GTEST_TEST_CLASS_NAME_(CaseName, TestName)                            \
-      : public CaseName<gtest_TypeParam_> {                                   \
-   private:                                                                   \
-    typedef CaseName<gtest_TypeParam_> TestFixture;                           \
-    typedef gtest_TypeParam_ TypeParam;                                       \
-    void TestBody() override;                                                 \
-  };                                                                          \
-  static bool gtest_##CaseName##_##TestName##_registered_                     \
-      GTEST_ATTRIBUTE_UNUSED_ = ::testing::internal::TypeParameterizedTest<   \
-          CaseName,                                                           \
-          ::testing::internal::TemplateSel<GTEST_TEST_CLASS_NAME_(CaseName,   \
-                                                                  TestName)>, \
-          GTEST_TYPE_PARAMS_(                                                 \
-              CaseName)>::Register("",                                        \
-                                   ::testing::internal::CodeLocation(         \
-                                       __FILE__, __LINE__),                   \
-                                   GTEST_STRINGIFY_(CaseName),                \
-                                   GTEST_STRINGIFY_(TestName), 0,             \
-                                   ::testing::internal::GenerateNames<        \
-                                       GTEST_NAME_GENERATOR_(CaseName),       \
-                                       GTEST_TYPE_PARAMS_(CaseName)>());      \
-  template <typename gtest_TypeParam_>                                        \
-  void GTEST_TEST_CLASS_NAME_(CaseName,                                       \
-                              TestName)<gtest_TypeParam_>::TestBody()
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define TYPED_TEST_CASE                                                \
-  static_assert(::testing::internal::TypedTestCaseIsDeprecated(), ""); \
-  TYPED_TEST_SUITE
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// Implements type-parameterized tests.
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Expands to the namespace name that the type-parameterized tests for
-// the given type-parameterized test suite are defined in.  The exact
-// name of the namespace is subject to change without notice.
-#define GTEST_SUITE_NAMESPACE_(TestSuiteName) gtest_suite_##TestSuiteName##_
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Expands to the name of the variable used to remember the names of
-// the defined tests in the given test suite.
-#define GTEST_TYPED_TEST_SUITE_P_STATE_(TestSuiteName) \
-  gtest_typed_test_suite_p_state_##TestSuiteName##_
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE DIRECTLY.
-//
-// Expands to the name of the variable used to remember the names of
-// the registered tests in the given test suite.
-#define GTEST_REGISTERED_TEST_NAMES_(TestSuiteName) \
-  gtest_registered_test_names_##TestSuiteName##_
-
-// The variables defined in the type-parameterized test macros are
-// static as typically these macros are used in a .h file that can be
-// #included in multiple translation units linked together.
-#define TYPED_TEST_SUITE_P(SuiteName)              \
-  static ::testing::internal::TypedTestSuitePState \
-      GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName)
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define TYPED_TEST_CASE_P                                                 \
-  static_assert(::testing::internal::TypedTestCase_P_IsDeprecated(), ""); \
-  TYPED_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#define TYPED_TEST_P(SuiteName, TestName)                             \
-  namespace GTEST_SUITE_NAMESPACE_(SuiteName) {                       \
-    template <typename gtest_TypeParam_>                              \
-    class TestName : public SuiteName<gtest_TypeParam_> {             \
-     private:                                                         \
-      typedef SuiteName<gtest_TypeParam_> TestFixture;                \
-      typedef gtest_TypeParam_ TypeParam;                             \
-      void TestBody() override;                                       \
-    };                                                                \
-    static bool gtest_##TestName##_defined_ GTEST_ATTRIBUTE_UNUSED_ = \
-        GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName).AddTestName(       \
-            __FILE__, __LINE__, GTEST_STRINGIFY_(SuiteName),          \
-            GTEST_STRINGIFY_(TestName));                              \
-  }                                                                   \
-  template <typename gtest_TypeParam_>                                \
-  void GTEST_SUITE_NAMESPACE_(                                        \
-      SuiteName)::TestName<gtest_TypeParam_>::TestBody()
-
-// Note: this won't work correctly if the trailing arguments are macros.
-#define REGISTER_TYPED_TEST_SUITE_P(SuiteName, ...)                         \
-  namespace GTEST_SUITE_NAMESPACE_(SuiteName) {                             \
-    typedef ::testing::internal::Templates<__VA_ARGS__> gtest_AllTests_;    \
-  }                                                                         \
-  static const char* const GTEST_REGISTERED_TEST_NAMES_(                    \
-      SuiteName) GTEST_ATTRIBUTE_UNUSED_ =                                  \
-      GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName).VerifyRegisteredTestNames( \
-          GTEST_STRINGIFY_(SuiteName), __FILE__, __LINE__, #__VA_ARGS__)
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define REGISTER_TYPED_TEST_CASE_P                                           \
-  static_assert(::testing::internal::RegisterTypedTestCase_P_IsDeprecated(), \
-                "");                                                         \
-  REGISTER_TYPED_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#define INSTANTIATE_TYPED_TEST_SUITE_P(Prefix, SuiteName, Types, ...)       \
-  static_assert(sizeof(GTEST_STRINGIFY_(Prefix)) > 1,                       \
-                "test-suit-prefix must not be empty");                      \
-  static bool gtest_##Prefix##_##SuiteName GTEST_ATTRIBUTE_UNUSED_ =        \
-      ::testing::internal::TypeParameterizedTestSuite<                      \
-          SuiteName, GTEST_SUITE_NAMESPACE_(SuiteName)::gtest_AllTests_,    \
-          ::testing::internal::GenerateTypeList<Types>::type>::             \
-          Register(GTEST_STRINGIFY_(Prefix),                                \
-                   ::testing::internal::CodeLocation(__FILE__, __LINE__),   \
-                   &GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName),             \
-                   GTEST_STRINGIFY_(SuiteName),                             \
-                   GTEST_REGISTERED_TEST_NAMES_(SuiteName),                 \
-                   ::testing::internal::GenerateNames<                      \
-                       ::testing::internal::NameGeneratorSelector<          \
-                           __VA_ARGS__>::type,                              \
-                       ::testing::internal::GenerateTypeList<Types>::type>())
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define INSTANTIATE_TYPED_TEST_CASE_P                                      \
-  static_assert(                                                           \
-      ::testing::internal::InstantiateTypedTestCase_P_IsDeprecated(), ""); \
-  INSTANTIATE_TYPED_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// Silence C4100 (unreferenced formal parameter) and 4805
-// unsafe mix of type 'const int' and type 'const bool'
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4805)
-# pragma warning(disable:4100)
-#endif
-
-
-// Declares the flags.
-
-// This flag temporary enables the disabled tests.
-GTEST_DECLARE_bool_(also_run_disabled_tests);
-
-// This flag brings the debugger on an assertion failure.
-GTEST_DECLARE_bool_(break_on_failure);
-
-// This flag controls whether Google Test catches all test-thrown exceptions
-// and logs them as failures.
-GTEST_DECLARE_bool_(catch_exceptions);
-
-// This flag enables using colors in terminal output. Available values are
-// "yes" to enable colors, "no" (disable colors), or "auto" (the default)
-// to let Google Test decide.
-GTEST_DECLARE_string_(color);
-
-// This flag controls whether the test runner should continue execution past
-// first failure.
-GTEST_DECLARE_bool_(fail_fast);
-
-// This flag sets up the filter to select by name using a glob pattern
-// the tests to run. If the filter is not given all tests are executed.
-GTEST_DECLARE_string_(filter);
-
-// This flag controls whether Google Test installs a signal handler that dumps
-// debugging information when fatal signals are raised.
-GTEST_DECLARE_bool_(install_failure_signal_handler);
-
-// This flag causes the Google Test to list tests. None of the tests listed
-// are actually run if the flag is provided.
-GTEST_DECLARE_bool_(list_tests);
-
-// This flag controls whether Google Test emits a detailed XML report to a file
-// in addition to its normal textual output.
-GTEST_DECLARE_string_(output);
-
-// This flags control whether Google Test prints only test failures.
-GTEST_DECLARE_bool_(brief);
-
-// This flags control whether Google Test prints the elapsed time for each
-// test.
-GTEST_DECLARE_bool_(print_time);
-
-// This flags control whether Google Test prints UTF8 characters as text.
-GTEST_DECLARE_bool_(print_utf8);
-
-// This flag specifies the random number seed.
-GTEST_DECLARE_int32_(random_seed);
-
-// This flag sets how many times the tests are repeated. The default value
-// is 1. If the value is -1 the tests are repeating forever.
-GTEST_DECLARE_int32_(repeat);
-
-// This flag controls whether Google Test includes Google Test internal
-// stack frames in failure stack traces.
-GTEST_DECLARE_bool_(show_internal_stack_frames);
-
-// When this flag is specified, tests' order is randomized on every iteration.
-GTEST_DECLARE_bool_(shuffle);
-
-// This flag specifies the maximum number of stack frames to be
-// printed in a failure message.
-GTEST_DECLARE_int32_(stack_trace_depth);
-
-// When this flag is specified, a failed assertion will throw an
-// exception if exceptions are enabled, or exit the program with a
-// non-zero code otherwise. For use with an external test framework.
-GTEST_DECLARE_bool_(throw_on_failure);
-
-// When this flag is set with a "host:port" string, on supported
-// platforms test results are streamed to the specified port on
-// the specified host machine.
-GTEST_DECLARE_string_(stream_result_to);
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-GTEST_DECLARE_string_(flagfile);
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-// The upper limit for valid stack trace depths.
-const int kMaxStackTraceDepth = 100;
-
-namespace internal {
-
-class AssertHelper;
-class DefaultGlobalTestPartResultReporter;
-class ExecDeathTest;
-class NoExecDeathTest;
-class FinalSuccessChecker;
-class GTestFlagSaver;
-class StreamingListenerTest;
-class TestResultAccessor;
-class TestEventListenersAccessor;
-class TestEventRepeater;
-class UnitTestRecordPropertyTestHelper;
-class WindowsDeathTest;
-class FuchsiaDeathTest;
-class UnitTestImpl* GetUnitTestImpl();
-void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
-                                    const std::string& message);
-std::set<std::string>* GetIgnoredParameterizedTestSuites();
-
-}  // namespace internal
-
-// The friend relationship of some of these classes is cyclic.
-// If we don't forward declare them the compiler might confuse the classes
-// in friendship clauses with same named classes on the scope.
-class Test;
-class TestSuite;
-
-// Old API is still available but deprecated
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-using TestCase = TestSuite;
-#endif
-class TestInfo;
-class UnitTest;
-
-// A class for indicating whether an assertion was successful.  When
-// the assertion wasn't successful, the AssertionResult object
-// remembers a non-empty message that describes how it failed.
-//
-// To create an instance of this class, use one of the factory functions
-// (AssertionSuccess() and AssertionFailure()).
-//
-// This class is useful for two purposes:
-//   1. Defining predicate functions to be used with Boolean test assertions
-//      EXPECT_TRUE/EXPECT_FALSE and their ASSERT_ counterparts
-//   2. Defining predicate-format functions to be
-//      used with predicate assertions (ASSERT_PRED_FORMAT*, etc).
-//
-// For example, if you define IsEven predicate:
-//
-//   testing::AssertionResult IsEven(int n) {
-//     if ((n % 2) == 0)
-//       return testing::AssertionSuccess();
-//     else
-//       return testing::AssertionFailure() << n << " is odd";
-//   }
-//
-// Then the failed expectation EXPECT_TRUE(IsEven(Fib(5)))
-// will print the message
-//
-//   Value of: IsEven(Fib(5))
-//     Actual: false (5 is odd)
-//   Expected: true
-//
-// instead of a more opaque
-//
-//   Value of: IsEven(Fib(5))
-//     Actual: false
-//   Expected: true
-//
-// in case IsEven is a simple Boolean predicate.
-//
-// If you expect your predicate to be reused and want to support informative
-// messages in EXPECT_FALSE and ASSERT_FALSE (negative assertions show up
-// about half as often as positive ones in our tests), supply messages for
-// both success and failure cases:
-//
-//   testing::AssertionResult IsEven(int n) {
-//     if ((n % 2) == 0)
-//       return testing::AssertionSuccess() << n << " is even";
-//     else
-//       return testing::AssertionFailure() << n << " is odd";
-//   }
-//
-// Then a statement EXPECT_FALSE(IsEven(Fib(6))) will print
-//
-//   Value of: IsEven(Fib(6))
-//     Actual: true (8 is even)
-//   Expected: false
-//
-// NB: Predicates that support negative Boolean assertions have reduced
-// performance in positive ones so be careful not to use them in tests
-// that have lots (tens of thousands) of positive Boolean assertions.
-//
-// To use this class with EXPECT_PRED_FORMAT assertions such as:
-//
-//   // Verifies that Foo() returns an even number.
-//   EXPECT_PRED_FORMAT1(IsEven, Foo());
-//
-// you need to define:
-//
-//   testing::AssertionResult IsEven(const char* expr, int n) {
-//     if ((n % 2) == 0)
-//       return testing::AssertionSuccess();
-//     else
-//       return testing::AssertionFailure()
-//         << "Expected: " << expr << " is even\n  Actual: it's " << n;
-//   }
-//
-// If Foo() returns 5, you will see the following message:
-//
-//   Expected: Foo() is even
-//     Actual: it's 5
-//
-class GTEST_API_ AssertionResult {
- public:
-  // Copy constructor.
-  // Used in EXPECT_TRUE/FALSE(assertion_result).
-  AssertionResult(const AssertionResult& other);
-
-// C4800 is a level 3 warning in Visual Studio 2015 and earlier.
-// This warning is not emitted in Visual Studio 2017.
-// This warning is off by default starting in Visual Studio 2019 but can be
-// enabled with command-line options.
-#if defined(_MSC_VER) && (_MSC_VER < 1910 || _MSC_VER >= 1920)
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 /* forcing value to bool */)
-#endif
-
-  // Used in the EXPECT_TRUE/FALSE(bool_expression).
-  //
-  // T must be contextually convertible to bool.
-  //
-  // The second parameter prevents this overload from being considered if
-  // the argument is implicitly convertible to AssertionResult. In that case
-  // we want AssertionResult's copy constructor to be used.
-  template <typename T>
-  explicit AssertionResult(
-      const T& success,
-      typename std::enable_if<
-          !std::is_convertible<T, AssertionResult>::value>::type*
-      /*enabler*/
-      = nullptr)
-      : success_(success) {}
-
-#if defined(_MSC_VER) && (_MSC_VER < 1910 || _MSC_VER >= 1920)
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-#endif
-
-  // Assignment operator.
-  AssertionResult& operator=(AssertionResult other) {
-    swap(other);
-    return *this;
-  }
-
-  // Returns true if and only if the assertion succeeded.
-  operator bool() const { return success_; }  // NOLINT
-
-  // Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
-  AssertionResult operator!() const;
-
-  // Returns the text streamed into this AssertionResult. Test assertions
-  // use it when they fail (i.e., the predicate's outcome doesn't match the
-  // assertion's expectation). When nothing has been streamed into the
-  // object, returns an empty string.
-  const char* message() const {
-    return message_.get() != nullptr ? message_->c_str() : "";
-  }
-  // Deprecated; please use message() instead.
-  const char* failure_message() const { return message(); }
-
-  // Streams a custom failure message into this object.
-  template <typename T> AssertionResult& operator<<(const T& value) {
-    AppendMessage(Message() << value);
-    return *this;
-  }
-
-  // Allows streaming basic output manipulators such as endl or flush into
-  // this object.
-  AssertionResult& operator<<(
-      ::std::ostream& (*basic_manipulator)(::std::ostream& stream)) {
-    AppendMessage(Message() << basic_manipulator);
-    return *this;
-  }
-
- private:
-  // Appends the contents of message to message_.
-  void AppendMessage(const Message& a_message) {
-    if (message_.get() == nullptr) message_.reset(new ::std::string);
-    message_->append(a_message.GetString().c_str());
-  }
-
-  // Swap the contents of this AssertionResult with other.
-  void swap(AssertionResult& other);
-
-  // Stores result of the assertion predicate.
-  bool success_;
-  // Stores the message describing the condition in case the expectation
-  // construct is not satisfied with the predicate's outcome.
-  // Referenced via a pointer to avoid taking too much stack frame space
-  // with test assertions.
-  std::unique_ptr< ::std::string> message_;
-};
-
-// Makes a successful assertion result.
-GTEST_API_ AssertionResult AssertionSuccess();
-
-// Makes a failed assertion result.
-GTEST_API_ AssertionResult AssertionFailure();
-
-// Makes a failed assertion result with the given failure message.
-// Deprecated; use AssertionFailure() << msg.
-GTEST_API_ AssertionResult AssertionFailure(const Message& msg);
-
-}  // namespace testing
-
-// Includes the auto-generated header that implements a family of generic
-// predicate assertion macros. This include comes late because it relies on
-// APIs declared above.
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file is AUTOMATICALLY GENERATED on 01/02/2019 by command
-// 'gen_gtest_pred_impl.py 5'.  DO NOT EDIT BY HAND!
-//
-// Implements a family of generic predicate assertion macros.
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-#define GOOGLETEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-
-
-namespace testing {
-
-// This header implements a family of generic predicate assertion
-// macros:
-//
-//   ASSERT_PRED_FORMAT1(pred_format, v1)
-//   ASSERT_PRED_FORMAT2(pred_format, v1, v2)
-//   ...
-//
-// where pred_format is a function or functor that takes n (in the
-// case of ASSERT_PRED_FORMATn) values and their source expression
-// text, and returns a testing::AssertionResult.  See the definition
-// of ASSERT_EQ in gtest.h for an example.
-//
-// If you don't care about formatting, you can use the more
-// restrictive version:
-//
-//   ASSERT_PRED1(pred, v1)
-//   ASSERT_PRED2(pred, v1, v2)
-//   ...
-//
-// where pred is an n-ary function or functor that returns bool,
-// and the values v1, v2, ..., must support the << operator for
-// streaming to std::ostream.
-//
-// We also define the EXPECT_* variations.
-//
-// For now we only support predicates whose arity is at most 5.
-// Please email googletestframework@googlegroups.com if you need
-// support for higher arities.
-
-// GTEST_ASSERT_ is the basic statement to which all of the assertions
-// in this file reduce.  Don't use this in your code.
-
-#define GTEST_ASSERT_(expression, on_failure) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (const ::testing::AssertionResult gtest_ar = (expression)) \
-    ; \
-  else \
-    on_failure(gtest_ar.failure_message())
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED1.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1>
-AssertionResult AssertPred1Helper(const char* pred_text,
-                                  const char* e1,
-                                  Pred pred,
-                                  const T1& v1) {
-  if (pred(v1)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT1.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT1_(pred_format, v1, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, v1), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED1.  Don't use
-// this in your code.
-#define GTEST_PRED1_(pred, v1, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred1Helper(#pred, \
-                                             #v1, \
-                                             pred, \
-                                             v1), on_failure)
-
-// Unary predicate assertion macros.
-#define EXPECT_PRED_FORMAT1(pred_format, v1) \
-  GTEST_PRED_FORMAT1_(pred_format, v1, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED1(pred, v1) \
-  GTEST_PRED1_(pred, v1, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT1(pred_format, v1) \
-  GTEST_PRED_FORMAT1_(pred_format, v1, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED1(pred, v1) \
-  GTEST_PRED1_(pred, v1, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED2.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2>
-AssertionResult AssertPred2Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2) {
-  if (pred(v1, v2)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2
-         << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT2.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT2_(pred_format, v1, v2, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, v1, v2), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED2.  Don't use
-// this in your code.
-#define GTEST_PRED2_(pred, v1, v2, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred2Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             pred, \
-                                             v1, \
-                                             v2), on_failure)
-
-// Binary predicate assertion macros.
-#define EXPECT_PRED_FORMAT2(pred_format, v1, v2) \
-  GTEST_PRED_FORMAT2_(pred_format, v1, v2, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED2(pred, v1, v2) \
-  GTEST_PRED2_(pred, v1, v2, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT2(pred_format, v1, v2) \
-  GTEST_PRED_FORMAT2_(pred_format, v1, v2, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED2(pred, v1, v2) \
-  GTEST_PRED2_(pred, v1, v2, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED3.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2,
-          typename T3>
-AssertionResult AssertPred3Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  const char* e3,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2,
-                                  const T3& v3) {
-  if (pred(v1, v2, v3)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2 << ", " << e3
-         << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
-         << e3 << " evaluates to " << ::testing::PrintToString(v3);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT3.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, v1, v2, v3), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED3.  Don't use
-// this in your code.
-#define GTEST_PRED3_(pred, v1, v2, v3, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred3Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             #v3, \
-                                             pred, \
-                                             v1, \
-                                             v2, \
-                                             v3), on_failure)
-
-// Ternary predicate assertion macros.
-#define EXPECT_PRED_FORMAT3(pred_format, v1, v2, v3) \
-  GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED3(pred, v1, v2, v3) \
-  GTEST_PRED3_(pred, v1, v2, v3, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT3(pred_format, v1, v2, v3) \
-  GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED3(pred, v1, v2, v3) \
-  GTEST_PRED3_(pred, v1, v2, v3, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED4.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2,
-          typename T3,
-          typename T4>
-AssertionResult AssertPred4Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  const char* e3,
-                                  const char* e4,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2,
-                                  const T3& v3,
-                                  const T4& v4) {
-  if (pred(v1, v2, v3, v4)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2 << ", " << e3 << ", " << e4
-         << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
-         << e3 << " evaluates to " << ::testing::PrintToString(v3) << "\n"
-         << e4 << " evaluates to " << ::testing::PrintToString(v4);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT4.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, #v4, v1, v2, v3, v4), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED4.  Don't use
-// this in your code.
-#define GTEST_PRED4_(pred, v1, v2, v3, v4, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred4Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             #v3, \
-                                             #v4, \
-                                             pred, \
-                                             v1, \
-                                             v2, \
-                                             v3, \
-                                             v4), on_failure)
-
-// 4-ary predicate assertion macros.
-#define EXPECT_PRED_FORMAT4(pred_format, v1, v2, v3, v4) \
-  GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED4(pred, v1, v2, v3, v4) \
-  GTEST_PRED4_(pred, v1, v2, v3, v4, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT4(pred_format, v1, v2, v3, v4) \
-  GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED4(pred, v1, v2, v3, v4) \
-  GTEST_PRED4_(pred, v1, v2, v3, v4, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED5.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2,
-          typename T3,
-          typename T4,
-          typename T5>
-AssertionResult AssertPred5Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  const char* e3,
-                                  const char* e4,
-                                  const char* e5,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2,
-                                  const T3& v3,
-                                  const T4& v4,
-                                  const T5& v5) {
-  if (pred(v1, v2, v3, v4, v5)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2 << ", " << e3 << ", " << e4
-         << ", " << e5 << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
-         << e3 << " evaluates to " << ::testing::PrintToString(v3) << "\n"
-         << e4 << " evaluates to " << ::testing::PrintToString(v4) << "\n"
-         << e5 << " evaluates to " << ::testing::PrintToString(v5);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT5.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, #v4, #v5, v1, v2, v3, v4, v5), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED5.  Don't use
-// this in your code.
-#define GTEST_PRED5_(pred, v1, v2, v3, v4, v5, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred5Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             #v3, \
-                                             #v4, \
-                                             #v5, \
-                                             pred, \
-                                             v1, \
-                                             v2, \
-                                             v3, \
-                                             v4, \
-                                             v5), on_failure)
-
-// 5-ary predicate assertion macros.
-#define EXPECT_PRED_FORMAT5(pred_format, v1, v2, v3, v4, v5) \
-  GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED5(pred, v1, v2, v3, v4, v5) \
-  GTEST_PRED5_(pred, v1, v2, v3, v4, v5, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT5(pred_format, v1, v2, v3, v4, v5) \
-  GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED5(pred, v1, v2, v3, v4, v5) \
-  GTEST_PRED5_(pred, v1, v2, v3, v4, v5, GTEST_FATAL_FAILURE_)
-
-
-
-}  // namespace testing
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-
-namespace testing {
-
-// The abstract class that all tests inherit from.
-//
-// In Google Test, a unit test program contains one or many TestSuites, and
-// each TestSuite contains one or many Tests.
-//
-// When you define a test using the TEST macro, you don't need to
-// explicitly derive from Test - the TEST macro automatically does
-// this for you.
-//
-// The only time you derive from Test is when defining a test fixture
-// to be used in a TEST_F.  For example:
-//
-//   class FooTest : public testing::Test {
-//    protected:
-//     void SetUp() override { ... }
-//     void TearDown() override { ... }
-//     ...
-//   };
-//
-//   TEST_F(FooTest, Bar) { ... }
-//   TEST_F(FooTest, Baz) { ... }
-//
-// Test is not copyable.
-class GTEST_API_ Test {
- public:
-  friend class TestInfo;
-
-  // The d'tor is virtual as we intend to inherit from Test.
-  virtual ~Test();
-
-  // Sets up the stuff shared by all tests in this test suite.
-  //
-  // Google Test will call Foo::SetUpTestSuite() before running the first
-  // test in test suite Foo.  Hence a sub-class can define its own
-  // SetUpTestSuite() method to shadow the one defined in the super
-  // class.
-  static void SetUpTestSuite() {}
-
-  // Tears down the stuff shared by all tests in this test suite.
-  //
-  // Google Test will call Foo::TearDownTestSuite() after running the last
-  // test in test suite Foo.  Hence a sub-class can define its own
-  // TearDownTestSuite() method to shadow the one defined in the super
-  // class.
-  static void TearDownTestSuite() {}
-
-  // Legacy API is deprecated but still available. Use SetUpTestSuite and
-  // TearDownTestSuite instead.
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  static void TearDownTestCase() {}
-  static void SetUpTestCase() {}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Returns true if and only if the current test has a fatal failure.
-  static bool HasFatalFailure();
-
-  // Returns true if and only if the current test has a non-fatal failure.
-  static bool HasNonfatalFailure();
-
-  // Returns true if and only if the current test was skipped.
-  static bool IsSkipped();
-
-  // Returns true if and only if the current test has a (either fatal or
-  // non-fatal) failure.
-  static bool HasFailure() { return HasFatalFailure() || HasNonfatalFailure(); }
-
-  // Logs a property for the current test, test suite, or for the entire
-  // invocation of the test program when used outside of the context of a
-  // test suite.  Only the last value for a given key is remembered.  These
-  // are public static so they can be called from utility functions that are
-  // not members of the test fixture.  Calls to RecordProperty made during
-  // lifespan of the test (from the moment its constructor starts to the
-  // moment its destructor finishes) will be output in XML as attributes of
-  // the <testcase> element.  Properties recorded from fixture's
-  // SetUpTestSuite or TearDownTestSuite are logged as attributes of the
-  // corresponding <testsuite> element.  Calls to RecordProperty made in the
-  // global context (before or after invocation of RUN_ALL_TESTS and from
-  // SetUp/TearDown method of Environment objects registered with Google
-  // Test) will be output as attributes of the <testsuites> element.
-  static void RecordProperty(const std::string& key, const std::string& value);
-  static void RecordProperty(const std::string& key, int value);
-
- protected:
-  // Creates a Test object.
-  Test();
-
-  // Sets up the test fixture.
-  virtual void SetUp();
-
-  // Tears down the test fixture.
-  virtual void TearDown();
-
- private:
-  // Returns true if and only if the current test has the same fixture class
-  // as the first test in the current test suite.
-  static bool HasSameFixtureClass();
-
-  // Runs the test after the test fixture has been set up.
-  //
-  // A sub-class must implement this to define the test logic.
-  //
-  // DO NOT OVERRIDE THIS FUNCTION DIRECTLY IN A USER PROGRAM.
-  // Instead, use the TEST or TEST_F macro.
-  virtual void TestBody() = 0;
-
-  // Sets up, executes, and tears down the test.
-  void Run();
-
-  // Deletes self.  We deliberately pick an unusual name for this
-  // internal method to avoid clashing with names used in user TESTs.
-  void DeleteSelf_() { delete this; }
-
-  const std::unique_ptr<GTEST_FLAG_SAVER_> gtest_flag_saver_;
-
-  // Often a user misspells SetUp() as Setup() and spends a long time
-  // wondering why it is never called by Google Test.  The declaration of
-  // the following method is solely for catching such an error at
-  // compile time:
-  //
-  //   - The return type is deliberately chosen to be not void, so it
-  //   will be a conflict if void Setup() is declared in the user's
-  //   test fixture.
-  //
-  //   - This method is private, so it will be another compiler error
-  //   if the method is called from the user's test fixture.
-  //
-  // DO NOT OVERRIDE THIS FUNCTION.
-  //
-  // If you see an error about overriding the following function or
-  // about it being private, you have mis-spelled SetUp() as Setup().
-  struct Setup_should_be_spelled_SetUp {};
-  virtual Setup_should_be_spelled_SetUp* Setup() { return nullptr; }
-
-  // We disallow copying Tests.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Test);
-};
-
-typedef internal::TimeInMillis TimeInMillis;
-
-// A copyable object representing a user specified test property which can be
-// output as a key/value string pair.
-//
-// Don't inherit from TestProperty as its destructor is not virtual.
-class TestProperty {
- public:
-  // C'tor.  TestProperty does NOT have a default constructor.
-  // Always use this constructor (with parameters) to create a
-  // TestProperty object.
-  TestProperty(const std::string& a_key, const std::string& a_value) :
-    key_(a_key), value_(a_value) {
-  }
-
-  // Gets the user supplied key.
-  const char* key() const {
-    return key_.c_str();
-  }
-
-  // Gets the user supplied value.
-  const char* value() const {
-    return value_.c_str();
-  }
-
-  // Sets a new value, overriding the one supplied in the constructor.
-  void SetValue(const std::string& new_value) {
-    value_ = new_value;
-  }
-
- private:
-  // The key supplied by the user.
-  std::string key_;
-  // The value supplied by the user.
-  std::string value_;
-};
-
-// The result of a single Test.  This includes a list of
-// TestPartResults, a list of TestProperties, a count of how many
-// death tests there are in the Test, and how much time it took to run
-// the Test.
-//
-// TestResult is not copyable.
-class GTEST_API_ TestResult {
- public:
-  // Creates an empty TestResult.
-  TestResult();
-
-  // D'tor.  Do not inherit from TestResult.
-  ~TestResult();
-
-  // Gets the number of all test parts.  This is the sum of the number
-  // of successful test parts and the number of failed test parts.
-  int total_part_count() const;
-
-  // Returns the number of the test properties.
-  int test_property_count() const;
-
-  // Returns true if and only if the test passed (i.e. no test part failed).
-  bool Passed() const { return !Skipped() && !Failed(); }
-
-  // Returns true if and only if the test was skipped.
-  bool Skipped() const;
-
-  // Returns true if and only if the test failed.
-  bool Failed() const;
-
-  // Returns true if and only if the test fatally failed.
-  bool HasFatalFailure() const;
-
-  // Returns true if and only if the test has a non-fatal failure.
-  bool HasNonfatalFailure() const;
-
-  // Returns the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const { return elapsed_time_; }
-
-  // Gets the time of the test case start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const { return start_timestamp_; }
-
-  // Returns the i-th test part result among all the results. i can range from 0
-  // to total_part_count() - 1. If i is not in that range, aborts the program.
-  const TestPartResult& GetTestPartResult(int i) const;
-
-  // Returns the i-th test property. i can range from 0 to
-  // test_property_count() - 1. If i is not in that range, aborts the
-  // program.
-  const TestProperty& GetTestProperty(int i) const;
-
- private:
-  friend class TestInfo;
-  friend class TestSuite;
-  friend class UnitTest;
-  friend class internal::DefaultGlobalTestPartResultReporter;
-  friend class internal::ExecDeathTest;
-  friend class internal::TestResultAccessor;
-  friend class internal::UnitTestImpl;
-  friend class internal::WindowsDeathTest;
-  friend class internal::FuchsiaDeathTest;
-
-  // Gets the vector of TestPartResults.
-  const std::vector<TestPartResult>& test_part_results() const {
-    return test_part_results_;
-  }
-
-  // Gets the vector of TestProperties.
-  const std::vector<TestProperty>& test_properties() const {
-    return test_properties_;
-  }
-
-  // Sets the start time.
-  void set_start_timestamp(TimeInMillis start) { start_timestamp_ = start; }
-
-  // Sets the elapsed time.
-  void set_elapsed_time(TimeInMillis elapsed) { elapsed_time_ = elapsed; }
-
-  // Adds a test property to the list. The property is validated and may add
-  // a non-fatal failure if invalid (e.g., if it conflicts with reserved
-  // key names). If a property is already recorded for the same key, the
-  // value will be updated, rather than storing multiple values for the same
-  // key.  xml_element specifies the element for which the property is being
-  // recorded and is used for validation.
-  void RecordProperty(const std::string& xml_element,
-                      const TestProperty& test_property);
-
-  // Adds a failure if the key is a reserved attribute of Google Test
-  // testsuite tags.  Returns true if the property is valid.
-  // FIXME: Validate attribute names are legal and human readable.
-  static bool ValidateTestProperty(const std::string& xml_element,
-                                   const TestProperty& test_property);
-
-  // Adds a test part result to the list.
-  void AddTestPartResult(const TestPartResult& test_part_result);
-
-  // Returns the death test count.
-  int death_test_count() const { return death_test_count_; }
-
-  // Increments the death test count, returning the new count.
-  int increment_death_test_count() { return ++death_test_count_; }
-
-  // Clears the test part results.
-  void ClearTestPartResults();
-
-  // Clears the object.
-  void Clear();
-
-  // Protects mutable state of the property vector and of owned
-  // properties, whose values may be updated.
-  internal::Mutex test_properties_mutex_;
-
-  // The vector of TestPartResults
-  std::vector<TestPartResult> test_part_results_;
-  // The vector of TestProperties
-  std::vector<TestProperty> test_properties_;
-  // Running count of death tests.
-  int death_test_count_;
-  // The start time, in milliseconds since UNIX Epoch.
-  TimeInMillis start_timestamp_;
-  // The elapsed time, in milliseconds.
-  TimeInMillis elapsed_time_;
-
-  // We disallow copying TestResult.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestResult);
-};  // class TestResult
-
-// A TestInfo object stores the following information about a test:
-//
-//   Test suite name
-//   Test name
-//   Whether the test should be run
-//   A function pointer that creates the test object when invoked
-//   Test result
-//
-// The constructor of TestInfo registers itself with the UnitTest
-// singleton such that the RUN_ALL_TESTS() macro knows which tests to
-// run.
-class GTEST_API_ TestInfo {
- public:
-  // Destructs a TestInfo object.  This function is not virtual, so
-  // don't inherit from TestInfo.
-  ~TestInfo();
-
-  // Returns the test suite name.
-  const char* test_suite_name() const { return test_suite_name_.c_str(); }
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const char* test_case_name() const { return test_suite_name(); }
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Returns the test name.
-  const char* name() const { return name_.c_str(); }
-
-  // Returns the name of the parameter type, or NULL if this is not a typed
-  // or a type-parameterized test.
-  const char* type_param() const {
-    if (type_param_.get() != nullptr) return type_param_->c_str();
-    return nullptr;
-  }
-
-  // Returns the text representation of the value parameter, or NULL if this
-  // is not a value-parameterized test.
-  const char* value_param() const {
-    if (value_param_.get() != nullptr) return value_param_->c_str();
-    return nullptr;
-  }
-
-  // Returns the file name where this test is defined.
-  const char* file() const { return location_.file.c_str(); }
-
-  // Returns the line where this test is defined.
-  int line() const { return location_.line; }
-
-  // Return true if this test should not be run because it's in another shard.
-  bool is_in_another_shard() const { return is_in_another_shard_; }
-
-  // Returns true if this test should run, that is if the test is not
-  // disabled (or it is disabled but the also_run_disabled_tests flag has
-  // been specified) and its full name matches the user-specified filter.
-  //
-  // Google Test allows the user to filter the tests by their full names.
-  // The full name of a test Bar in test suite Foo is defined as
-  // "Foo.Bar".  Only the tests that match the filter will run.
-  //
-  // A filter is a colon-separated list of glob (not regex) patterns,
-  // optionally followed by a '-' and a colon-separated list of
-  // negative patterns (tests to exclude).  A test is run if it
-  // matches one of the positive patterns and does not match any of
-  // the negative patterns.
-  //
-  // For example, *A*:Foo.* is a filter that matches any string that
-  // contains the character 'A' or starts with "Foo.".
-  bool should_run() const { return should_run_; }
-
-  // Returns true if and only if this test will appear in the XML report.
-  bool is_reportable() const {
-    // The XML report includes tests matching the filter, excluding those
-    // run in other shards.
-    return matches_filter_ && !is_in_another_shard_;
-  }
-
-  // Returns the result of the test.
-  const TestResult* result() const { return &result_; }
-
- private:
-#if GTEST_HAS_DEATH_TEST
-  friend class internal::DefaultDeathTestFactory;
-#endif  // GTEST_HAS_DEATH_TEST
-  friend class Test;
-  friend class TestSuite;
-  friend class internal::UnitTestImpl;
-  friend class internal::StreamingListenerTest;
-  friend TestInfo* internal::MakeAndRegisterTestInfo(
-      const char* test_suite_name, const char* name, const char* type_param,
-      const char* value_param, internal::CodeLocation code_location,
-      internal::TypeId fixture_class_id, internal::SetUpTestSuiteFunc set_up_tc,
-      internal::TearDownTestSuiteFunc tear_down_tc,
-      internal::TestFactoryBase* factory);
-
-  // Constructs a TestInfo object. The newly constructed instance assumes
-  // ownership of the factory object.
-  TestInfo(const std::string& test_suite_name, const std::string& name,
-           const char* a_type_param,   // NULL if not a type-parameterized test
-           const char* a_value_param,  // NULL if not a value-parameterized test
-           internal::CodeLocation a_code_location,
-           internal::TypeId fixture_class_id,
-           internal::TestFactoryBase* factory);
-
-  // Increments the number of death tests encountered in this test so
-  // far.
-  int increment_death_test_count() {
-    return result_.increment_death_test_count();
-  }
-
-  // Creates the test object, runs it, records its result, and then
-  // deletes it.
-  void Run();
-
-  // Skip and records the test result for this object.
-  void Skip();
-
-  static void ClearTestResult(TestInfo* test_info) {
-    test_info->result_.Clear();
-  }
-
-  // These fields are immutable properties of the test.
-  const std::string test_suite_name_;    // test suite name
-  const std::string name_;               // Test name
-  // Name of the parameter type, or NULL if this is not a typed or a
-  // type-parameterized test.
-  const std::unique_ptr<const ::std::string> type_param_;
-  // Text representation of the value parameter, or NULL if this is not a
-  // value-parameterized test.
-  const std::unique_ptr<const ::std::string> value_param_;
-  internal::CodeLocation location_;
-  const internal::TypeId fixture_class_id_;  // ID of the test fixture class
-  bool should_run_;           // True if and only if this test should run
-  bool is_disabled_;          // True if and only if this test is disabled
-  bool matches_filter_;       // True if this test matches the
-                              // user-specified filter.
-  bool is_in_another_shard_;  // Will be run in another shard.
-  internal::TestFactoryBase* const factory_;  // The factory that creates
-                                              // the test object
-
-  // This field is mutable and needs to be reset before running the
-  // test for the second time.
-  TestResult result_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestInfo);
-};
-
-// A test suite, which consists of a vector of TestInfos.
-//
-// TestSuite is not copyable.
-class GTEST_API_ TestSuite {
- public:
-  // Creates a TestSuite with the given name.
-  //
-  // TestSuite does NOT have a default constructor.  Always use this
-  // constructor to create a TestSuite object.
-  //
-  // Arguments:
-  //
-  //   name:         name of the test suite
-  //   a_type_param: the name of the test's type parameter, or NULL if
-  //                 this is not a type-parameterized test.
-  //   set_up_tc:    pointer to the function that sets up the test suite
-  //   tear_down_tc: pointer to the function that tears down the test suite
-  TestSuite(const char* name, const char* a_type_param,
-            internal::SetUpTestSuiteFunc set_up_tc,
-            internal::TearDownTestSuiteFunc tear_down_tc);
-
-  // Destructor of TestSuite.
-  virtual ~TestSuite();
-
-  // Gets the name of the TestSuite.
-  const char* name() const { return name_.c_str(); }
-
-  // Returns the name of the parameter type, or NULL if this is not a
-  // type-parameterized test suite.
-  const char* type_param() const {
-    if (type_param_.get() != nullptr) return type_param_->c_str();
-    return nullptr;
-  }
-
-  // Returns true if any test in this test suite should run.
-  bool should_run() const { return should_run_; }
-
-  // Gets the number of successful tests in this test suite.
-  int successful_test_count() const;
-
-  // Gets the number of skipped tests in this test suite.
-  int skipped_test_count() const;
-
-  // Gets the number of failed tests in this test suite.
-  int failed_test_count() const;
-
-  // Gets the number of disabled tests that will be reported in the XML report.
-  int reportable_disabled_test_count() const;
-
-  // Gets the number of disabled tests in this test suite.
-  int disabled_test_count() const;
-
-  // Gets the number of tests to be printed in the XML report.
-  int reportable_test_count() const;
-
-  // Get the number of tests in this test suite that should run.
-  int test_to_run_count() const;
-
-  // Gets the number of all tests in this test suite.
-  int total_test_count() const;
-
-  // Returns true if and only if the test suite passed.
-  bool Passed() const { return !Failed(); }
-
-  // Returns true if and only if the test suite failed.
-  bool Failed() const {
-    return failed_test_count() > 0 || ad_hoc_test_result().Failed();
-  }
-
-  // Returns the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const { return elapsed_time_; }
-
-  // Gets the time of the test suite start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const { return start_timestamp_; }
-
-  // Returns the i-th test among all the tests. i can range from 0 to
-  // total_test_count() - 1. If i is not in that range, returns NULL.
-  const TestInfo* GetTestInfo(int i) const;
-
-  // Returns the TestResult that holds test properties recorded during
-  // execution of SetUpTestSuite and TearDownTestSuite.
-  const TestResult& ad_hoc_test_result() const { return ad_hoc_test_result_; }
-
- private:
-  friend class Test;
-  friend class internal::UnitTestImpl;
-
-  // Gets the (mutable) vector of TestInfos in this TestSuite.
-  std::vector<TestInfo*>& test_info_list() { return test_info_list_; }
-
-  // Gets the (immutable) vector of TestInfos in this TestSuite.
-  const std::vector<TestInfo*>& test_info_list() const {
-    return test_info_list_;
-  }
-
-  // Returns the i-th test among all the tests. i can range from 0 to
-  // total_test_count() - 1. If i is not in that range, returns NULL.
-  TestInfo* GetMutableTestInfo(int i);
-
-  // Sets the should_run member.
-  void set_should_run(bool should) { should_run_ = should; }
-
-  // Adds a TestInfo to this test suite.  Will delete the TestInfo upon
-  // destruction of the TestSuite object.
-  void AddTestInfo(TestInfo * test_info);
-
-  // Clears the results of all tests in this test suite.
-  void ClearResult();
-
-  // Clears the results of all tests in the given test suite.
-  static void ClearTestSuiteResult(TestSuite* test_suite) {
-    test_suite->ClearResult();
-  }
-
-  // Runs every test in this TestSuite.
-  void Run();
-
-  // Skips the execution of tests under this TestSuite
-  void Skip();
-
-  // Runs SetUpTestSuite() for this TestSuite.  This wrapper is needed
-  // for catching exceptions thrown from SetUpTestSuite().
-  void RunSetUpTestSuite() {
-    if (set_up_tc_ != nullptr) {
-      (*set_up_tc_)();
-    }
-  }
-
-  // Runs TearDownTestSuite() for this TestSuite.  This wrapper is
-  // needed for catching exceptions thrown from TearDownTestSuite().
-  void RunTearDownTestSuite() {
-    if (tear_down_tc_ != nullptr) {
-      (*tear_down_tc_)();
-    }
-  }
-
-  // Returns true if and only if test passed.
-  static bool TestPassed(const TestInfo* test_info) {
-    return test_info->should_run() && test_info->result()->Passed();
-  }
-
-  // Returns true if and only if test skipped.
-  static bool TestSkipped(const TestInfo* test_info) {
-    return test_info->should_run() && test_info->result()->Skipped();
-  }
-
-  // Returns true if and only if test failed.
-  static bool TestFailed(const TestInfo* test_info) {
-    return test_info->should_run() && test_info->result()->Failed();
-  }
-
-  // Returns true if and only if the test is disabled and will be reported in
-  // the XML report.
-  static bool TestReportableDisabled(const TestInfo* test_info) {
-    return test_info->is_reportable() && test_info->is_disabled_;
-  }
-
-  // Returns true if and only if test is disabled.
-  static bool TestDisabled(const TestInfo* test_info) {
-    return test_info->is_disabled_;
-  }
-
-  // Returns true if and only if this test will appear in the XML report.
-  static bool TestReportable(const TestInfo* test_info) {
-    return test_info->is_reportable();
-  }
-
-  // Returns true if the given test should run.
-  static bool ShouldRunTest(const TestInfo* test_info) {
-    return test_info->should_run();
-  }
-
-  // Shuffles the tests in this test suite.
-  void ShuffleTests(internal::Random* random);
-
-  // Restores the test order to before the first shuffle.
-  void UnshuffleTests();
-
-  // Name of the test suite.
-  std::string name_;
-  // Name of the parameter type, or NULL if this is not a typed or a
-  // type-parameterized test.
-  const std::unique_ptr<const ::std::string> type_param_;
-  // The vector of TestInfos in their original order.  It owns the
-  // elements in the vector.
-  std::vector<TestInfo*> test_info_list_;
-  // Provides a level of indirection for the test list to allow easy
-  // shuffling and restoring the test order.  The i-th element in this
-  // vector is the index of the i-th test in the shuffled test list.
-  std::vector<int> test_indices_;
-  // Pointer to the function that sets up the test suite.
-  internal::SetUpTestSuiteFunc set_up_tc_;
-  // Pointer to the function that tears down the test suite.
-  internal::TearDownTestSuiteFunc tear_down_tc_;
-  // True if and only if any test in this test suite should run.
-  bool should_run_;
-  // The start time, in milliseconds since UNIX Epoch.
-  TimeInMillis start_timestamp_;
-  // Elapsed time, in milliseconds.
-  TimeInMillis elapsed_time_;
-  // Holds test properties recorded during execution of SetUpTestSuite and
-  // TearDownTestSuite.
-  TestResult ad_hoc_test_result_;
-
-  // We disallow copying TestSuites.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestSuite);
-};
-
-// An Environment object is capable of setting up and tearing down an
-// environment.  You should subclass this to define your own
-// environment(s).
-//
-// An Environment object does the set-up and tear-down in virtual
-// methods SetUp() and TearDown() instead of the constructor and the
-// destructor, as:
-//
-//   1. You cannot safely throw from a destructor.  This is a problem
-//      as in some cases Google Test is used where exceptions are enabled, and
-//      we may want to implement ASSERT_* using exceptions where they are
-//      available.
-//   2. You cannot use ASSERT_* directly in a constructor or
-//      destructor.
-class Environment {
- public:
-  // The d'tor is virtual as we need to subclass Environment.
-  virtual ~Environment() {}
-
-  // Override this to define how to set up the environment.
-  virtual void SetUp() {}
-
-  // Override this to define how to tear down the environment.
-  virtual void TearDown() {}
- private:
-  // If you see an error about overriding the following function or
-  // about it being private, you have mis-spelled SetUp() as Setup().
-  struct Setup_should_be_spelled_SetUp {};
-  virtual Setup_should_be_spelled_SetUp* Setup() { return nullptr; }
-};
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Exception which can be thrown from TestEventListener::OnTestPartResult.
-class GTEST_API_ AssertionException
-    : public internal::GoogleTestFailureException {
- public:
-  explicit AssertionException(const TestPartResult& result)
-      : GoogleTestFailureException(result) {}
-};
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// The interface for tracing execution of tests. The methods are organized in
-// the order the corresponding events are fired.
-class TestEventListener {
- public:
-  virtual ~TestEventListener() {}
-
-  // Fired before any test activity starts.
-  virtual void OnTestProgramStart(const UnitTest& unit_test) = 0;
-
-  // Fired before each iteration of tests starts.  There may be more than
-  // one iteration if GTEST_FLAG(repeat) is set. iteration is the iteration
-  // index, starting from 0.
-  virtual void OnTestIterationStart(const UnitTest& unit_test,
-                                    int iteration) = 0;
-
-  // Fired before environment set-up for each iteration of tests starts.
-  virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test) = 0;
-
-  // Fired after environment set-up for each iteration of tests ends.
-  virtual void OnEnvironmentsSetUpEnd(const UnitTest& unit_test) = 0;
-
-  // Fired before the test suite starts.
-  virtual void OnTestSuiteStart(const TestSuite& /*test_suite*/) {}
-
-  //  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  virtual void OnTestCaseStart(const TestCase& /*test_case*/) {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Fired before the test starts.
-  virtual void OnTestStart(const TestInfo& test_info) = 0;
-
-  // Fired after a failed assertion or a SUCCEED() invocation.
-  // If you want to throw an exception from this function to skip to the next
-  // TEST, it must be AssertionException defined above, or inherited from it.
-  virtual void OnTestPartResult(const TestPartResult& test_part_result) = 0;
-
-  // Fired after the test ends.
-  virtual void OnTestEnd(const TestInfo& test_info) = 0;
-
-  // Fired after the test suite ends.
-  virtual void OnTestSuiteEnd(const TestSuite& /*test_suite*/) {}
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  virtual void OnTestCaseEnd(const TestCase& /*test_case*/) {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Fired before environment tear-down for each iteration of tests starts.
-  virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test) = 0;
-
-  // Fired after environment tear-down for each iteration of tests ends.
-  virtual void OnEnvironmentsTearDownEnd(const UnitTest& unit_test) = 0;
-
-  // Fired after each iteration of tests finishes.
-  virtual void OnTestIterationEnd(const UnitTest& unit_test,
-                                  int iteration) = 0;
-
-  // Fired after all test activities have ended.
-  virtual void OnTestProgramEnd(const UnitTest& unit_test) = 0;
-};
-
-// The convenience class for users who need to override just one or two
-// methods and are not concerned that a possible change to a signature of
-// the methods they override will not be caught during the build.  For
-// comments about each method please see the definition of TestEventListener
-// above.
-class EmptyTestEventListener : public TestEventListener {
- public:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int /*iteration*/) override {}
-  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {}
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestSuiteStart(const TestSuite& /*test_suite*/) override {}
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestCase& /*test_case*/) override {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnTestStart(const TestInfo& /*test_info*/) override {}
-  void OnTestPartResult(const TestPartResult& /*test_part_result*/) override {}
-  void OnTestEnd(const TestInfo& /*test_info*/) override {}
-  void OnTestSuiteEnd(const TestSuite& /*test_suite*/) override {}
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& /*test_case*/) override {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {}
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                          int /*iteration*/) override {}
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
-};
-
-// TestEventListeners lets users add listeners to track events in Google Test.
-class GTEST_API_ TestEventListeners {
- public:
-  TestEventListeners();
-  ~TestEventListeners();
-
-  // Appends an event listener to the end of the list. Google Test assumes
-  // the ownership of the listener (i.e. it will delete the listener when
-  // the test program finishes).
-  void Append(TestEventListener* listener);
-
-  // Removes the given event listener from the list and returns it.  It then
-  // becomes the caller's responsibility to delete the listener. Returns
-  // NULL if the listener is not found in the list.
-  TestEventListener* Release(TestEventListener* listener);
-
-  // Returns the standard listener responsible for the default console
-  // output.  Can be removed from the listeners list to shut down default
-  // console output.  Note that removing this object from the listener list
-  // with Release transfers its ownership to the caller and makes this
-  // function return NULL the next time.
-  TestEventListener* default_result_printer() const {
-    return default_result_printer_;
-  }
-
-  // Returns the standard listener responsible for the default XML output
-  // controlled by the --gtest_output=xml flag.  Can be removed from the
-  // listeners list by users who want to shut down the default XML output
-  // controlled by this flag and substitute it with custom one.  Note that
-  // removing this object from the listener list with Release transfers its
-  // ownership to the caller and makes this function return NULL the next
-  // time.
-  TestEventListener* default_xml_generator() const {
-    return default_xml_generator_;
-  }
-
- private:
-  friend class TestSuite;
-  friend class TestInfo;
-  friend class internal::DefaultGlobalTestPartResultReporter;
-  friend class internal::NoExecDeathTest;
-  friend class internal::TestEventListenersAccessor;
-  friend class internal::UnitTestImpl;
-
-  // Returns repeater that broadcasts the TestEventListener events to all
-  // subscribers.
-  TestEventListener* repeater();
-
-  // Sets the default_result_printer attribute to the provided listener.
-  // The listener is also added to the listener list and previous
-  // default_result_printer is removed from it and deleted. The listener can
-  // also be NULL in which case it will not be added to the list. Does
-  // nothing if the previous and the current listener objects are the same.
-  void SetDefaultResultPrinter(TestEventListener* listener);
-
-  // Sets the default_xml_generator attribute to the provided listener.  The
-  // listener is also added to the listener list and previous
-  // default_xml_generator is removed from it and deleted. The listener can
-  // also be NULL in which case it will not be added to the list. Does
-  // nothing if the previous and the current listener objects are the same.
-  void SetDefaultXmlGenerator(TestEventListener* listener);
-
-  // Controls whether events will be forwarded by the repeater to the
-  // listeners in the list.
-  bool EventForwardingEnabled() const;
-  void SuppressEventForwarding();
-
-  // The actual list of listeners.
-  internal::TestEventRepeater* repeater_;
-  // Listener responsible for the standard result output.
-  TestEventListener* default_result_printer_;
-  // Listener responsible for the creation of the XML output file.
-  TestEventListener* default_xml_generator_;
-
-  // We disallow copying TestEventListeners.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventListeners);
-};
-
-// A UnitTest consists of a vector of TestSuites.
-//
-// This is a singleton class.  The only instance of UnitTest is
-// created when UnitTest::GetInstance() is first called.  This
-// instance is never deleted.
-//
-// UnitTest is not copyable.
-//
-// This class is thread-safe as long as the methods are called
-// according to their specification.
-class GTEST_API_ UnitTest {
- public:
-  // Gets the singleton UnitTest object.  The first time this method
-  // is called, a UnitTest object is constructed and returned.
-  // Consecutive calls will return the same object.
-  static UnitTest* GetInstance();
-
-  // Runs all tests in this UnitTest object and prints the result.
-  // Returns 0 if successful, or 1 otherwise.
-  //
-  // This method can only be called from the main thread.
-  //
-  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-  int Run() GTEST_MUST_USE_RESULT_;
-
-  // Returns the working directory when the first TEST() or TEST_F()
-  // was executed.  The UnitTest object owns the string.
-  const char* original_working_dir() const;
-
-  // Returns the TestSuite object for the test that's currently running,
-  // or NULL if no test is running.
-  const TestSuite* current_test_suite() const GTEST_LOCK_EXCLUDED_(mutex_);
-
-// Legacy API is still available but deprecated
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const TestCase* current_test_case() const GTEST_LOCK_EXCLUDED_(mutex_);
-#endif
-
-  // Returns the TestInfo object for the test that's currently running,
-  // or NULL if no test is running.
-  const TestInfo* current_test_info() const
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Returns the random seed used at the start of the current test run.
-  int random_seed() const;
-
-  // Returns the ParameterizedTestSuiteRegistry object used to keep track of
-  // value-parameterized tests and instantiate and register them.
-  //
-  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-  internal::ParameterizedTestSuiteRegistry& parameterized_test_registry()
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Gets the number of successful test suites.
-  int successful_test_suite_count() const;
-
-  // Gets the number of failed test suites.
-  int failed_test_suite_count() const;
-
-  // Gets the number of all test suites.
-  int total_test_suite_count() const;
-
-  // Gets the number of all test suites that contain at least one test
-  // that should run.
-  int test_suite_to_run_count() const;
-
-  //  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  int successful_test_case_count() const;
-  int failed_test_case_count() const;
-  int total_test_case_count() const;
-  int test_case_to_run_count() const;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Gets the number of successful tests.
-  int successful_test_count() const;
-
-  // Gets the number of skipped tests.
-  int skipped_test_count() const;
-
-  // Gets the number of failed tests.
-  int failed_test_count() const;
-
-  // Gets the number of disabled tests that will be reported in the XML report.
-  int reportable_disabled_test_count() const;
-
-  // Gets the number of disabled tests.
-  int disabled_test_count() const;
-
-  // Gets the number of tests to be printed in the XML report.
-  int reportable_test_count() const;
-
-  // Gets the number of all tests.
-  int total_test_count() const;
-
-  // Gets the number of tests that should run.
-  int test_to_run_count() const;
-
-  // Gets the time of the test program start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const;
-
-  // Gets the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const;
-
-  // Returns true if and only if the unit test passed (i.e. all test suites
-  // passed).
-  bool Passed() const;
-
-  // Returns true if and only if the unit test failed (i.e. some test suite
-  // failed or something outside of all tests failed).
-  bool Failed() const;
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  const TestSuite* GetTestSuite(int i) const;
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const TestCase* GetTestCase(int i) const;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Returns the TestResult containing information on test failures and
-  // properties logged outside of individual test suites.
-  const TestResult& ad_hoc_test_result() const;
-
-  // Returns the list of event listeners that can be used to track events
-  // inside Google Test.
-  TestEventListeners& listeners();
-
- private:
-  // Registers and returns a global test environment.  When a test
-  // program is run, all global test environments will be set-up in
-  // the order they were registered.  After all tests in the program
-  // have finished, all global test environments will be torn-down in
-  // the *reverse* order they were registered.
-  //
-  // The UnitTest object takes ownership of the given environment.
-  //
-  // This method can only be called from the main thread.
-  Environment* AddEnvironment(Environment* env);
-
-  // Adds a TestPartResult to the current TestResult object.  All
-  // Google Test assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc)
-  // eventually call this to report their results.  The user code
-  // should use the assertion macros instead of calling this directly.
-  void AddTestPartResult(TestPartResult::Type result_type,
-                         const char* file_name,
-                         int line_number,
-                         const std::string& message,
-                         const std::string& os_stack_trace)
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Adds a TestProperty to the current TestResult object when invoked from
-  // inside a test, to current TestSuite's ad_hoc_test_result_ when invoked
-  // from SetUpTestSuite or TearDownTestSuite, or to the global property set
-  // when invoked elsewhere.  If the result already contains a property with
-  // the same key, the value will be updated.
-  void RecordProperty(const std::string& key, const std::string& value);
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  TestSuite* GetMutableTestSuite(int i);
-
-  // Accessors for the implementation object.
-  internal::UnitTestImpl* impl() { return impl_; }
-  const internal::UnitTestImpl* impl() const { return impl_; }
-
-  // These classes and functions are friends as they need to access private
-  // members of UnitTest.
-  friend class ScopedTrace;
-  friend class Test;
-  friend class internal::AssertHelper;
-  friend class internal::StreamingListenerTest;
-  friend class internal::UnitTestRecordPropertyTestHelper;
-  friend Environment* AddGlobalTestEnvironment(Environment* env);
-  friend std::set<std::string>* internal::GetIgnoredParameterizedTestSuites();
-  friend internal::UnitTestImpl* internal::GetUnitTestImpl();
-  friend void internal::ReportFailureInUnknownLocation(
-      TestPartResult::Type result_type,
-      const std::string& message);
-
-  // Creates an empty UnitTest.
-  UnitTest();
-
-  // D'tor
-  virtual ~UnitTest();
-
-  // Pushes a trace defined by SCOPED_TRACE() on to the per-thread
-  // Google Test trace stack.
-  void PushGTestTrace(const internal::TraceInfo& trace)
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Pops a trace from the per-thread Google Test trace stack.
-  void PopGTestTrace()
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Protects mutable state in *impl_.  This is mutable as some const
-  // methods need to lock it too.
-  mutable internal::Mutex mutex_;
-
-  // Opaque implementation object.  This field is never changed once
-  // the object is constructed.  We don't mark it as const here, as
-  // doing so will cause a warning in the constructor of UnitTest.
-  // Mutable state in *impl_ is protected by mutex_.
-  internal::UnitTestImpl* impl_;
-
-  // We disallow copying UnitTest.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(UnitTest);
-};
-
-// A convenient wrapper for adding an environment for the test
-// program.
-//
-// You should call this before RUN_ALL_TESTS() is called, probably in
-// main().  If you use gtest_main, you need to call this before main()
-// starts for it to take effect.  For example, you can define a global
-// variable like this:
-//
-//   testing::Environment* const foo_env =
-//       testing::AddGlobalTestEnvironment(new FooEnvironment);
-//
-// However, we strongly recommend you to write your own main() and
-// call AddGlobalTestEnvironment() there, as relying on initialization
-// of global variables makes the code harder to read and may cause
-// problems when you register multiple environments from different
-// translation units and the environments have dependencies among them
-// (remember that the compiler doesn't guarantee the order in which
-// global variables from different translation units are initialized).
-inline Environment* AddGlobalTestEnvironment(Environment* env) {
-  return UnitTest::GetInstance()->AddEnvironment(env);
-}
-
-// Initializes Google Test.  This must be called before calling
-// RUN_ALL_TESTS().  In particular, it parses a command line for the
-// flags that Google Test recognizes.  Whenever a Google Test flag is
-// seen, it is removed from argv, and *argc is decremented.
-//
-// No value is returned.  Instead, the Google Test flag variables are
-// updated.
-//
-// Calling the function for the second time has no user-visible effect.
-GTEST_API_ void InitGoogleTest(int* argc, char** argv);
-
-// This overloaded version can be used in Windows programs compiled in
-// UNICODE mode.
-GTEST_API_ void InitGoogleTest(int* argc, wchar_t** argv);
-
-// This overloaded version can be used on Arduino/embedded platforms where
-// there is no argc/argv.
-GTEST_API_ void InitGoogleTest();
-
-namespace internal {
-
-// Separate the error generating code from the code path to reduce the stack
-// frame size of CmpHelperEQ. This helps reduce the overhead of some sanitizers
-// when calling EXPECT_* in a tight loop.
-template <typename T1, typename T2>
-AssertionResult CmpHelperEQFailure(const char* lhs_expression,
-                                   const char* rhs_expression,
-                                   const T1& lhs, const T2& rhs) {
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   FormatForComparisonFailureMessage(lhs, rhs),
-                   FormatForComparisonFailureMessage(rhs, lhs),
-                   false);
-}
-
-// This block of code defines operator==/!=
-// to block lexical scope lookup.
-// It prevents using invalid operator==/!= defined at namespace scope.
-struct faketype {};
-inline bool operator==(faketype, faketype) { return true; }
-inline bool operator!=(faketype, faketype) { return false; }
-
-// The helper function for {ASSERT|EXPECT}_EQ.
-template <typename T1, typename T2>
-AssertionResult CmpHelperEQ(const char* lhs_expression,
-                            const char* rhs_expression,
-                            const T1& lhs,
-                            const T2& rhs) {
-  if (lhs == rhs) {
-    return AssertionSuccess();
-  }
-
-  return CmpHelperEQFailure(lhs_expression, rhs_expression, lhs, rhs);
-}
-
-class EqHelper {
- public:
-  // This templatized version is for the general case.
-  template <
-      typename T1, typename T2,
-      // Disable this overload for cases where one argument is a pointer
-      // and the other is the null pointer constant.
-      typename std::enable_if<!std::is_integral<T1>::value ||
-                              !std::is_pointer<T2>::value>::type* = nullptr>
-  static AssertionResult Compare(const char* lhs_expression,
-                                 const char* rhs_expression, const T1& lhs,
-                                 const T2& rhs) {
-    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
-  }
-
-  // With this overloaded version, we allow anonymous enums to be used
-  // in {ASSERT|EXPECT}_EQ when compiled with gcc 4, as anonymous
-  // enums can be implicitly cast to BiggestInt.
-  //
-  // Even though its body looks the same as the above version, we
-  // cannot merge the two, as it will make anonymous enums unhappy.
-  static AssertionResult Compare(const char* lhs_expression,
-                                 const char* rhs_expression,
-                                 BiggestInt lhs,
-                                 BiggestInt rhs) {
-    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
-  }
-
-  template <typename T>
-  static AssertionResult Compare(
-      const char* lhs_expression, const char* rhs_expression,
-      // Handle cases where '0' is used as a null pointer literal.
-      std::nullptr_t /* lhs */, T* rhs) {
-    // We already know that 'lhs' is a null pointer.
-    return CmpHelperEQ(lhs_expression, rhs_expression, static_cast<T*>(nullptr),
-                       rhs);
-  }
-};
-
-// Separate the error generating code from the code path to reduce the stack
-// frame size of CmpHelperOP. This helps reduce the overhead of some sanitizers
-// when calling EXPECT_OP in a tight loop.
-template <typename T1, typename T2>
-AssertionResult CmpHelperOpFailure(const char* expr1, const char* expr2,
-                                   const T1& val1, const T2& val2,
-                                   const char* op) {
-  return AssertionFailure()
-         << "Expected: (" << expr1 << ") " << op << " (" << expr2
-         << "), actual: " << FormatForComparisonFailureMessage(val1, val2)
-         << " vs " << FormatForComparisonFailureMessage(val2, val1);
-}
-
-// A macro for implementing the helper functions needed to implement
-// ASSERT_?? and EXPECT_??.  It is here just to avoid copy-and-paste
-// of similar code.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-
-#define GTEST_IMPL_CMP_HELPER_(op_name, op)\
-template <typename T1, typename T2>\
-AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
-                                   const T1& val1, const T2& val2) {\
-  if (val1 op val2) {\
-    return AssertionSuccess();\
-  } else {\
-    return CmpHelperOpFailure(expr1, expr2, val1, val2, #op);\
-  }\
-}
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-
-// Implements the helper function for {ASSERT|EXPECT}_NE
-GTEST_IMPL_CMP_HELPER_(NE, !=)
-// Implements the helper function for {ASSERT|EXPECT}_LE
-GTEST_IMPL_CMP_HELPER_(LE, <=)
-// Implements the helper function for {ASSERT|EXPECT}_LT
-GTEST_IMPL_CMP_HELPER_(LT, <)
-// Implements the helper function for {ASSERT|EXPECT}_GE
-GTEST_IMPL_CMP_HELPER_(GE, >=)
-// Implements the helper function for {ASSERT|EXPECT}_GT
-GTEST_IMPL_CMP_HELPER_(GT, >)
-
-#undef GTEST_IMPL_CMP_HELPER_
-
-// The helper function for {ASSERT|EXPECT}_STREQ.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const char* s1,
-                                          const char* s2);
-
-// The helper function for {ASSERT|EXPECT}_STRCASEEQ.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRCASEEQ(const char* s1_expression,
-                                              const char* s2_expression,
-                                              const char* s1,
-                                              const char* s2);
-
-// The helper function for {ASSERT|EXPECT}_STRNE.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const char* s1,
-                                          const char* s2);
-
-// The helper function for {ASSERT|EXPECT}_STRCASENE.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
-                                              const char* s2_expression,
-                                              const char* s1,
-                                              const char* s2);
-
-
-// Helper function for *_STREQ on wide strings.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const wchar_t* s1,
-                                          const wchar_t* s2);
-
-// Helper function for *_STRNE on wide strings.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const wchar_t* s1,
-                                          const wchar_t* s2);
-
-}  // namespace internal
-
-// IsSubstring() and IsNotSubstring() are intended to be used as the
-// first argument to {EXPECT,ASSERT}_PRED_FORMAT2(), not by
-// themselves.  They check whether needle is a substring of haystack
-// (NULL is considered a substring of itself only), and return an
-// appropriate error message when they fail.
-//
-// The {needle,haystack}_expr arguments are the stringified
-// expressions that generated the two real arguments.
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack);
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack);
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack);
-
-#if GTEST_HAS_STD_WSTRING
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack);
-#endif  // GTEST_HAS_STD_WSTRING
-
-namespace internal {
-
-// Helper template function for comparing floating-points.
-//
-// Template parameter:
-//
-//   RawType: the raw floating-point type (either float or double)
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-template <typename RawType>
-AssertionResult CmpHelperFloatingPointEQ(const char* lhs_expression,
-                                         const char* rhs_expression,
-                                         RawType lhs_value,
-                                         RawType rhs_value) {
-  const FloatingPoint<RawType> lhs(lhs_value), rhs(rhs_value);
-
-  if (lhs.AlmostEquals(rhs)) {
-    return AssertionSuccess();
-  }
-
-  ::std::stringstream lhs_ss;
-  lhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-         << lhs_value;
-
-  ::std::stringstream rhs_ss;
-  rhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-         << rhs_value;
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   StringStreamToString(&lhs_ss),
-                   StringStreamToString(&rhs_ss),
-                   false);
-}
-
-// Helper function for implementing ASSERT_NEAR.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult DoubleNearPredFormat(const char* expr1,
-                                                const char* expr2,
-                                                const char* abs_error_expr,
-                                                double val1,
-                                                double val2,
-                                                double abs_error);
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-// A class that enables one to stream messages to assertion macros
-class GTEST_API_ AssertHelper {
- public:
-  // Constructor.
-  AssertHelper(TestPartResult::Type type,
-               const char* file,
-               int line,
-               const char* message);
-  ~AssertHelper();
-
-  // Message assignment is a semantic trick to enable assertion
-  // streaming; see the GTEST_MESSAGE_ macro below.
-  void operator=(const Message& message) const;
-
- private:
-  // We put our data in a struct so that the size of the AssertHelper class can
-  // be as small as possible.  This is important because gcc is incapable of
-  // re-using stack space even for temporary variables, so every EXPECT_EQ
-  // reserves stack space for another AssertHelper.
-  struct AssertHelperData {
-    AssertHelperData(TestPartResult::Type t,
-                     const char* srcfile,
-                     int line_num,
-                     const char* msg)
-        : type(t), file(srcfile), line(line_num), message(msg) { }
-
-    TestPartResult::Type const type;
-    const char* const file;
-    int const line;
-    std::string const message;
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelperData);
-  };
-
-  AssertHelperData* const data_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelper);
-};
-
-}  // namespace internal
-
-// The pure interface class that all value-parameterized tests inherit from.
-// A value-parameterized class must inherit from both ::testing::Test and
-// ::testing::WithParamInterface. In most cases that just means inheriting
-// from ::testing::TestWithParam, but more complicated test hierarchies
-// may need to inherit from Test and WithParamInterface at different levels.
-//
-// This interface has support for accessing the test parameter value via
-// the GetParam() method.
-//
-// Use it with one of the parameter generator defining functions, like Range(),
-// Values(), ValuesIn(), Bool(), and Combine().
-//
-// class FooTest : public ::testing::TestWithParam<int> {
-//  protected:
-//   FooTest() {
-//     // Can use GetParam() here.
-//   }
-//   ~FooTest() override {
-//     // Can use GetParam() here.
-//   }
-//   void SetUp() override {
-//     // Can use GetParam() here.
-//   }
-//   void TearDown override {
-//     // Can use GetParam() here.
-//   }
-// };
-// TEST_P(FooTest, DoesBar) {
-//   // Can use GetParam() method here.
-//   Foo foo;
-//   ASSERT_TRUE(foo.DoesBar(GetParam()));
-// }
-// INSTANTIATE_TEST_SUITE_P(OneToTenRange, FooTest, ::testing::Range(1, 10));
-
-template <typename T>
-class WithParamInterface {
- public:
-  typedef T ParamType;
-  virtual ~WithParamInterface() {}
-
-  // The current parameter value. Is also available in the test fixture's
-  // constructor.
-  static const ParamType& GetParam() {
-    GTEST_CHECK_(parameter_ != nullptr)
-        << "GetParam() can only be called inside a value-parameterized test "
-        << "-- did you intend to write TEST_P instead of TEST_F?";
-    return *parameter_;
-  }
-
- private:
-  // Sets parameter value. The caller is responsible for making sure the value
-  // remains alive and unchanged throughout the current test.
-  static void SetParam(const ParamType* parameter) {
-    parameter_ = parameter;
-  }
-
-  // Static value used for accessing parameter during a test lifetime.
-  static const ParamType* parameter_;
-
-  // TestClass must be a subclass of WithParamInterface<T> and Test.
-  template <class TestClass> friend class internal::ParameterizedTestFactory;
-};
-
-template <typename T>
-const T* WithParamInterface<T>::parameter_ = nullptr;
-
-// Most value-parameterized classes can ignore the existence of
-// WithParamInterface, and can just inherit from ::testing::TestWithParam.
-
-template <typename T>
-class TestWithParam : public Test, public WithParamInterface<T> {
-};
-
-// Macros for indicating success/failure in test code.
-
-// Skips test in runtime.
-// Skipping test aborts current function.
-// Skipped tests are neither successful nor failed.
-#define GTEST_SKIP() GTEST_SKIP_("")
-
-// ADD_FAILURE unconditionally adds a failure to the current test.
-// SUCCEED generates a success - it doesn't automatically make the
-// current test successful, as a test is only successful when it has
-// no failure.
-//
-// EXPECT_* verifies that a certain condition is satisfied.  If not,
-// it behaves like ADD_FAILURE.  In particular:
-//
-//   EXPECT_TRUE  verifies that a Boolean condition is true.
-//   EXPECT_FALSE verifies that a Boolean condition is false.
-//
-// FAIL and ASSERT_* are similar to ADD_FAILURE and EXPECT_*, except
-// that they will also abort the current function on failure.  People
-// usually want the fail-fast behavior of FAIL and ASSERT_*, but those
-// writing data-driven tests often find themselves using ADD_FAILURE
-// and EXPECT_* more.
-
-// Generates a nonfatal failure with a generic message.
-#define ADD_FAILURE() GTEST_NONFATAL_FAILURE_("Failed")
-
-// Generates a nonfatal failure at the given source file location with
-// a generic message.
-#define ADD_FAILURE_AT(file, line) \
-  GTEST_MESSAGE_AT_(file, line, "Failed", \
-                    ::testing::TestPartResult::kNonFatalFailure)
-
-// Generates a fatal failure with a generic message.
-#define GTEST_FAIL() GTEST_FATAL_FAILURE_("Failed")
-
-// Like GTEST_FAIL(), but at the given source file location.
-#define GTEST_FAIL_AT(file, line)         \
-  GTEST_MESSAGE_AT_(file, line, "Failed", \
-                    ::testing::TestPartResult::kFatalFailure)
-
-// Define this macro to 1 to omit the definition of FAIL(), which is a
-// generic name and clashes with some other libraries.
-#if !GTEST_DONT_DEFINE_FAIL
-# define FAIL() GTEST_FAIL()
-#endif
-
-// Generates a success with a generic message.
-#define GTEST_SUCCEED() GTEST_SUCCESS_("Succeeded")
-
-// Define this macro to 1 to omit the definition of SUCCEED(), which
-// is a generic name and clashes with some other libraries.
-#if !GTEST_DONT_DEFINE_SUCCEED
-# define SUCCEED() GTEST_SUCCEED()
-#endif
-
-// Macros for testing exceptions.
-//
-//    * {ASSERT|EXPECT}_THROW(statement, expected_exception):
-//         Tests that the statement throws the expected exception.
-//    * {ASSERT|EXPECT}_NO_THROW(statement):
-//         Tests that the statement doesn't throw any exception.
-//    * {ASSERT|EXPECT}_ANY_THROW(statement):
-//         Tests that the statement throws an exception.
-
-#define EXPECT_THROW(statement, expected_exception) \
-  GTEST_TEST_THROW_(statement, expected_exception, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_NO_THROW(statement) \
-  GTEST_TEST_NO_THROW_(statement, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_ANY_THROW(statement) \
-  GTEST_TEST_ANY_THROW_(statement, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_THROW(statement, expected_exception) \
-  GTEST_TEST_THROW_(statement, expected_exception, GTEST_FATAL_FAILURE_)
-#define ASSERT_NO_THROW(statement) \
-  GTEST_TEST_NO_THROW_(statement, GTEST_FATAL_FAILURE_)
-#define ASSERT_ANY_THROW(statement) \
-  GTEST_TEST_ANY_THROW_(statement, GTEST_FATAL_FAILURE_)
-
-// Boolean assertions. Condition can be either a Boolean expression or an
-// AssertionResult. For more information on how to use AssertionResult with
-// these macros see comments on that class.
-#define GTEST_EXPECT_TRUE(condition) \
-  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
-                      GTEST_NONFATAL_FAILURE_)
-#define GTEST_EXPECT_FALSE(condition) \
-  GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
-                      GTEST_NONFATAL_FAILURE_)
-#define GTEST_ASSERT_TRUE(condition) \
-  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
-                      GTEST_FATAL_FAILURE_)
-#define GTEST_ASSERT_FALSE(condition) \
-  GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
-                      GTEST_FATAL_FAILURE_)
-
-// Define these macros to 1 to omit the definition of the corresponding
-// EXPECT or ASSERT, which clashes with some users' own code.
-
-#if !GTEST_DONT_DEFINE_EXPECT_TRUE
-#define EXPECT_TRUE(condition) GTEST_EXPECT_TRUE(condition)
-#endif
-
-#if !GTEST_DONT_DEFINE_EXPECT_FALSE
-#define EXPECT_FALSE(condition) GTEST_EXPECT_FALSE(condition)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_TRUE
-#define ASSERT_TRUE(condition) GTEST_ASSERT_TRUE(condition)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_FALSE
-#define ASSERT_FALSE(condition) GTEST_ASSERT_FALSE(condition)
-#endif
-
-// Macros for testing equalities and inequalities.
-//
-//    * {ASSERT|EXPECT}_EQ(v1, v2): Tests that v1 == v2
-//    * {ASSERT|EXPECT}_NE(v1, v2): Tests that v1 != v2
-//    * {ASSERT|EXPECT}_LT(v1, v2): Tests that v1 < v2
-//    * {ASSERT|EXPECT}_LE(v1, v2): Tests that v1 <= v2
-//    * {ASSERT|EXPECT}_GT(v1, v2): Tests that v1 > v2
-//    * {ASSERT|EXPECT}_GE(v1, v2): Tests that v1 >= v2
-//
-// When they are not, Google Test prints both the tested expressions and
-// their actual values.  The values must be compatible built-in types,
-// or you will get a compiler error.  By "compatible" we mean that the
-// values can be compared by the respective operator.
-//
-// Note:
-//
-//   1. It is possible to make a user-defined type work with
-//   {ASSERT|EXPECT}_??(), but that requires overloading the
-//   comparison operators and is thus discouraged by the Google C++
-//   Usage Guide.  Therefore, you are advised to use the
-//   {ASSERT|EXPECT}_TRUE() macro to assert that two objects are
-//   equal.
-//
-//   2. The {ASSERT|EXPECT}_??() macros do pointer comparisons on
-//   pointers (in particular, C strings).  Therefore, if you use it
-//   with two C strings, you are testing how their locations in memory
-//   are related, not how their content is related.  To compare two C
-//   strings by content, use {ASSERT|EXPECT}_STR*().
-//
-//   3. {ASSERT|EXPECT}_EQ(v1, v2) is preferred to
-//   {ASSERT|EXPECT}_TRUE(v1 == v2), as the former tells you
-//   what the actual value is when it fails, and similarly for the
-//   other comparisons.
-//
-//   4. Do not depend on the order in which {ASSERT|EXPECT}_??()
-//   evaluate their arguments, which is undefined.
-//
-//   5. These macros evaluate their arguments exactly once.
-//
-// Examples:
-//
-//   EXPECT_NE(Foo(), 5);
-//   EXPECT_EQ(a_pointer, NULL);
-//   ASSERT_LT(i, array_size);
-//   ASSERT_GT(records.size(), 0) << "There is no record left.";
-
-#define EXPECT_EQ(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::EqHelper::Compare, val1, val2)
-#define EXPECT_NE(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
-#define EXPECT_LE(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
-#define EXPECT_LT(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
-#define EXPECT_GE(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
-#define EXPECT_GT(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
-
-#define GTEST_ASSERT_EQ(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::EqHelper::Compare, val1, val2)
-#define GTEST_ASSERT_NE(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
-#define GTEST_ASSERT_LE(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
-#define GTEST_ASSERT_LT(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
-#define GTEST_ASSERT_GE(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
-#define GTEST_ASSERT_GT(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
-
-// Define macro GTEST_DONT_DEFINE_ASSERT_XY to 1 to omit the definition of
-// ASSERT_XY(), which clashes with some users' own code.
-
-#if !GTEST_DONT_DEFINE_ASSERT_EQ
-# define ASSERT_EQ(val1, val2) GTEST_ASSERT_EQ(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_NE
-# define ASSERT_NE(val1, val2) GTEST_ASSERT_NE(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_LE
-# define ASSERT_LE(val1, val2) GTEST_ASSERT_LE(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_LT
-# define ASSERT_LT(val1, val2) GTEST_ASSERT_LT(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_GE
-# define ASSERT_GE(val1, val2) GTEST_ASSERT_GE(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_GT
-# define ASSERT_GT(val1, val2) GTEST_ASSERT_GT(val1, val2)
-#endif
-
-// C-string Comparisons.  All tests treat NULL and any non-NULL string
-// as different.  Two NULLs are equal.
-//
-//    * {ASSERT|EXPECT}_STREQ(s1, s2):     Tests that s1 == s2
-//    * {ASSERT|EXPECT}_STRNE(s1, s2):     Tests that s1 != s2
-//    * {ASSERT|EXPECT}_STRCASEEQ(s1, s2): Tests that s1 == s2, ignoring case
-//    * {ASSERT|EXPECT}_STRCASENE(s1, s2): Tests that s1 != s2, ignoring case
-//
-// For wide or narrow string objects, you can use the
-// {ASSERT|EXPECT}_??() macros.
-//
-// Don't depend on the order in which the arguments are evaluated,
-// which is undefined.
-//
-// These macros evaluate their arguments exactly once.
-
-#define EXPECT_STREQ(s1, s2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
-#define EXPECT_STRNE(s1, s2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
-#define EXPECT_STRCASEEQ(s1, s2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
-#define EXPECT_STRCASENE(s1, s2)\
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
-
-#define ASSERT_STREQ(s1, s2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
-#define ASSERT_STRNE(s1, s2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
-#define ASSERT_STRCASEEQ(s1, s2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
-#define ASSERT_STRCASENE(s1, s2)\
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
-
-// Macros for comparing floating-point numbers.
-//
-//    * {ASSERT|EXPECT}_FLOAT_EQ(val1, val2):
-//         Tests that two float values are almost equal.
-//    * {ASSERT|EXPECT}_DOUBLE_EQ(val1, val2):
-//         Tests that two double values are almost equal.
-//    * {ASSERT|EXPECT}_NEAR(v1, v2, abs_error):
-//         Tests that v1 and v2 are within the given distance to each other.
-//
-// Google Test uses ULP-based comparison to automatically pick a default
-// error bound that is appropriate for the operands.  See the
-// FloatingPoint template class in gtest-internal.h if you are
-// interested in the implementation details.
-
-#define EXPECT_FLOAT_EQ(val1, val2)\
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
-                      val1, val2)
-
-#define EXPECT_DOUBLE_EQ(val1, val2)\
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
-                      val1, val2)
-
-#define ASSERT_FLOAT_EQ(val1, val2)\
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
-                      val1, val2)
-
-#define ASSERT_DOUBLE_EQ(val1, val2)\
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
-                      val1, val2)
-
-#define EXPECT_NEAR(val1, val2, abs_error)\
-  EXPECT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
-                      val1, val2, abs_error)
-
-#define ASSERT_NEAR(val1, val2, abs_error)\
-  ASSERT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
-                      val1, val2, abs_error)
-
-// These predicate format functions work on floating-point values, and
-// can be used in {ASSERT|EXPECT}_PRED_FORMAT2*(), e.g.
-//
-//   EXPECT_PRED_FORMAT2(testing::DoubleLE, Foo(), 5.0);
-
-// Asserts that val1 is less than, or almost equal to, val2.  Fails
-// otherwise.  In particular, it fails if either val1 or val2 is NaN.
-GTEST_API_ AssertionResult FloatLE(const char* expr1, const char* expr2,
-                                   float val1, float val2);
-GTEST_API_ AssertionResult DoubleLE(const char* expr1, const char* expr2,
-                                    double val1, double val2);
-
-
-#if GTEST_OS_WINDOWS
-
-// Macros that test for HRESULT failure and success, these are only useful
-// on Windows, and rely on Windows SDK macros and APIs to compile.
-//
-//    * {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}(expr)
-//
-// When expr unexpectedly fails or succeeds, Google Test prints the
-// expected result and the actual result with both a human-readable
-// string representation of the error, if available, as well as the
-// hex result code.
-# define EXPECT_HRESULT_SUCCEEDED(expr) \
-    EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
-
-# define ASSERT_HRESULT_SUCCEEDED(expr) \
-    ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
-
-# define EXPECT_HRESULT_FAILED(expr) \
-    EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
-
-# define ASSERT_HRESULT_FAILED(expr) \
-    ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
-
-#endif  // GTEST_OS_WINDOWS
-
-// Macros that execute statement and check that it doesn't generate new fatal
-// failures in the current thread.
-//
-//   * {ASSERT|EXPECT}_NO_FATAL_FAILURE(statement);
-//
-// Examples:
-//
-//   EXPECT_NO_FATAL_FAILURE(Process());
-//   ASSERT_NO_FATAL_FAILURE(Process()) << "Process() failed";
-//
-#define ASSERT_NO_FATAL_FAILURE(statement) \
-    GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_FATAL_FAILURE_)
-#define EXPECT_NO_FATAL_FAILURE(statement) \
-    GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_NONFATAL_FAILURE_)
-
-// Causes a trace (including the given source file path and line number,
-// and the given message) to be included in every test failure message generated
-// by code in the scope of the lifetime of an instance of this class. The effect
-// is undone with the destruction of the instance.
-//
-// The message argument can be anything streamable to std::ostream.
-//
-// Example:
-//   testing::ScopedTrace trace("file.cc", 123, "message");
-//
-class GTEST_API_ ScopedTrace {
- public:
-  // The c'tor pushes the given source file location and message onto
-  // a trace stack maintained by Google Test.
-
-  // Template version. Uses Message() to convert the values into strings.
-  // Slow, but flexible.
-  template <typename T>
-  ScopedTrace(const char* file, int line, const T& message) {
-    PushTrace(file, line, (Message() << message).GetString());
-  }
-
-  // Optimize for some known types.
-  ScopedTrace(const char* file, int line, const char* message) {
-    PushTrace(file, line, message ? message : "(null)");
-  }
-
-  ScopedTrace(const char* file, int line, const std::string& message) {
-    PushTrace(file, line, message);
-  }
-
-  // The d'tor pops the info pushed by the c'tor.
-  //
-  // Note that the d'tor is not virtual in order to be efficient.
-  // Don't inherit from ScopedTrace!
-  ~ScopedTrace();
-
- private:
-  void PushTrace(const char* file, int line, std::string message);
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedTrace);
-} GTEST_ATTRIBUTE_UNUSED_;  // A ScopedTrace object does its job in its
-                            // c'tor and d'tor.  Therefore it doesn't
-                            // need to be used otherwise.
-
-// Causes a trace (including the source file path, the current line
-// number, and the given message) to be included in every test failure
-// message generated by code in the current scope.  The effect is
-// undone when the control leaves the current scope.
-//
-// The message argument can be anything streamable to std::ostream.
-//
-// In the implementation, we include the current line number as part
-// of the dummy variable name, thus allowing multiple SCOPED_TRACE()s
-// to appear in the same block - as long as they are on different
-// lines.
-//
-// Assuming that each thread maintains its own stack of traces.
-// Therefore, a SCOPED_TRACE() would (correctly) only affect the
-// assertions in its own thread.
-#define SCOPED_TRACE(message) \
-  ::testing::ScopedTrace GTEST_CONCAT_TOKEN_(gtest_trace_, __LINE__)(\
-    __FILE__, __LINE__, (message))
-
-// Compile-time assertion for type equality.
-// StaticAssertTypeEq<type1, type2>() compiles if and only if type1 and type2
-// are the same type.  The value it returns is not interesting.
-//
-// Instead of making StaticAssertTypeEq a class template, we make it a
-// function template that invokes a helper class template.  This
-// prevents a user from misusing StaticAssertTypeEq<T1, T2> by
-// defining objects of that type.
-//
-// CAVEAT:
-//
-// When used inside a method of a class template,
-// StaticAssertTypeEq<T1, T2>() is effective ONLY IF the method is
-// instantiated.  For example, given:
-//
-//   template <typename T> class Foo {
-//    public:
-//     void Bar() { testing::StaticAssertTypeEq<int, T>(); }
-//   };
-//
-// the code:
-//
-//   void Test1() { Foo<bool> foo; }
-//
-// will NOT generate a compiler error, as Foo<bool>::Bar() is never
-// actually instantiated.  Instead, you need:
-//
-//   void Test2() { Foo<bool> foo; foo.Bar(); }
-//
-// to cause a compiler error.
-template <typename T1, typename T2>
-constexpr bool StaticAssertTypeEq() noexcept {
-  static_assert(std::is_same<T1, T2>::value, "T1 and T2 are not the same type");
-  return true;
-}
-
-// Defines a test.
-//
-// The first parameter is the name of the test suite, and the second
-// parameter is the name of the test within the test suite.
-//
-// The convention is to end the test suite name with "Test".  For
-// example, a test suite for the Foo class can be named FooTest.
-//
-// Test code should appear between braces after an invocation of
-// this macro.  Example:
-//
-//   TEST(FooTest, InitializesCorrectly) {
-//     Foo foo;
-//     EXPECT_TRUE(foo.StatusIsOK());
-//   }
-
-// Note that we call GetTestTypeId() instead of GetTypeId<
-// ::testing::Test>() here to get the type ID of testing::Test.  This
-// is to work around a suspected linker bug when using Google Test as
-// a framework on Mac OS X.  The bug causes GetTypeId<
-// ::testing::Test>() to return different values depending on whether
-// the call is from the Google Test framework itself or from user test
-// code.  GetTestTypeId() is guaranteed to always return the same
-// value, as it always calls GetTypeId<>() from the Google Test
-// framework.
-#define GTEST_TEST(test_suite_name, test_name)             \
-  GTEST_TEST_(test_suite_name, test_name, ::testing::Test, \
-              ::testing::internal::GetTestTypeId())
-
-// Define this macro to 1 to omit the definition of TEST(), which
-// is a generic name and clashes with some other libraries.
-#if !GTEST_DONT_DEFINE_TEST
-#define TEST(test_suite_name, test_name) GTEST_TEST(test_suite_name, test_name)
-#endif
-
-// Defines a test that uses a test fixture.
-//
-// The first parameter is the name of the test fixture class, which
-// also doubles as the test suite name.  The second parameter is the
-// name of the test within the test suite.
-//
-// A test fixture class must be declared earlier.  The user should put
-// the test code between braces after using this macro.  Example:
-//
-//   class FooTest : public testing::Test {
-//    protected:
-//     void SetUp() override { b_.AddElement(3); }
-//
-//     Foo a_;
-//     Foo b_;
-//   };
-//
-//   TEST_F(FooTest, InitializesCorrectly) {
-//     EXPECT_TRUE(a_.StatusIsOK());
-//   }
-//
-//   TEST_F(FooTest, ReturnsElementCountCorrectly) {
-//     EXPECT_EQ(a_.size(), 0);
-//     EXPECT_EQ(b_.size(), 1);
-//   }
-//
-// GOOGLETEST_CM0011 DO NOT DELETE
-#if !GTEST_DONT_DEFINE_TEST
-#define TEST_F(test_fixture, test_name)\
-  GTEST_TEST_(test_fixture, test_name, test_fixture, \
-              ::testing::internal::GetTypeId<test_fixture>())
-#endif  // !GTEST_DONT_DEFINE_TEST
-
-// Returns a path to temporary directory.
-// Tries to determine an appropriate directory for the platform.
-GTEST_API_ std::string TempDir();
-
-#ifdef _MSC_VER
-#  pragma warning(pop)
-#endif
-
-// Dynamically registers a test with the framework.
-//
-// This is an advanced API only to be used when the `TEST` macros are
-// insufficient. The macros should be preferred when possible, as they avoid
-// most of the complexity of calling this function.
-//
-// The `factory` argument is a factory callable (move-constructible) object or
-// function pointer that creates a new instance of the Test object. It
-// handles ownership to the caller. The signature of the callable is
-// `Fixture*()`, where `Fixture` is the test fixture class for the test. All
-// tests registered with the same `test_suite_name` must return the same
-// fixture type. This is checked at runtime.
-//
-// The framework will infer the fixture class from the factory and will call
-// the `SetUpTestSuite` and `TearDownTestSuite` for it.
-//
-// Must be called before `RUN_ALL_TESTS()` is invoked, otherwise behavior is
-// undefined.
-//
-// Use case example:
-//
-// class MyFixture : public ::testing::Test {
-//  public:
-//   // All of these optional, just like in regular macro usage.
-//   static void SetUpTestSuite() { ... }
-//   static void TearDownTestSuite() { ... }
-//   void SetUp() override { ... }
-//   void TearDown() override { ... }
-// };
-//
-// class MyTest : public MyFixture {
-//  public:
-//   explicit MyTest(int data) : data_(data) {}
-//   void TestBody() override { ... }
-//
-//  private:
-//   int data_;
-// };
-//
-// void RegisterMyTests(const std::vector<int>& values) {
-//   for (int v : values) {
-//     ::testing::RegisterTest(
-//         "MyFixture", ("Test" + std::to_string(v)).c_str(), nullptr,
-//         std::to_string(v).c_str(),
-//         __FILE__, __LINE__,
-//         // Important to use the fixture type as the return type here.
-//         [=]() -> MyFixture* { return new MyTest(v); });
-//   }
-// }
-// ...
-// int main(int argc, char** argv) {
-//   std::vector<int> values_to_test = LoadValuesFromConfig();
-//   RegisterMyTests(values_to_test);
-//   ...
-//   return RUN_ALL_TESTS();
-// }
-//
-template <int&... ExplicitParameterBarrier, typename Factory>
-TestInfo* RegisterTest(const char* test_suite_name, const char* test_name,
-                       const char* type_param, const char* value_param,
-                       const char* file, int line, Factory factory) {
-  using TestT = typename std::remove_pointer<decltype(factory())>::type;
-
-  class FactoryImpl : public internal::TestFactoryBase {
-   public:
-    explicit FactoryImpl(Factory f) : factory_(std::move(f)) {}
-    Test* CreateTest() override { return factory_(); }
-
-   private:
-    Factory factory_;
-  };
-
-  return internal::MakeAndRegisterTestInfo(
-      test_suite_name, test_name, type_param, value_param,
-      internal::CodeLocation(file, line), internal::GetTypeId<TestT>(),
-      internal::SuiteApiResolver<TestT>::GetSetUpCaseOrSuite(file, line),
-      internal::SuiteApiResolver<TestT>::GetTearDownCaseOrSuite(file, line),
-      new FactoryImpl{std::move(factory)});
-}
-
-}  // namespace testing
-
-// Use this function in main() to run all tests.  It returns 0 if all
-// tests are successful, or 1 otherwise.
-//
-// RUN_ALL_TESTS() should be invoked after the command line has been
-// parsed by InitGoogleTest().
-//
-// This function was formerly a macro; thus, it is in the global
-// namespace and has an all-caps name.
-int RUN_ALL_TESTS() GTEST_MUST_USE_RESULT_;
-
-inline int RUN_ALL_TESTS() {
-  return ::testing::UnitTest::GetInstance()->Run();
-}
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_H_
diff --git a/3rdparty/fmt/test/header-only-test.cc b/3rdparty/fmt/test/header-only-test.cc
deleted file mode 100644
index 570f09a5..00000000
--- a/3rdparty/fmt/test/header-only-test.cc
+++ /dev/null
@@ -1,11 +0,0 @@
-// Header-only configuration test
-
-#include "fmt/core.h"
-#include "fmt/ostream.h"
-#include "gtest/gtest.h"
-
-#ifndef FMT_HEADER_ONLY
-#  error "Not in the header-only mode."
-#endif
-
-TEST(header_only_test, format) { EXPECT_EQ(fmt::format("foo"), "foo"); }
diff --git a/3rdparty/fmt/test/mock-allocator.h b/3rdparty/fmt/test/mock-allocator.h
deleted file mode 100644
index 6a67e08f..00000000
--- a/3rdparty/fmt/test/mock-allocator.h
+++ /dev/null
@@ -1,64 +0,0 @@
-// Formatting library for C++ - mock allocator
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_MOCK_ALLOCATOR_H_
-#define FMT_MOCK_ALLOCATOR_H_
-
-#include <assert.h>  // assert
-#include <stddef.h>  // size_t
-
-#include <memory>  // std::allocator_traits
-
-#include "gmock/gmock.h"
-
-template <typename T> class mock_allocator {
- public:
-  mock_allocator() {}
-  mock_allocator(const mock_allocator&) {}
-  using value_type = T;
-  MOCK_METHOD1_T(allocate, T*(size_t n));
-  MOCK_METHOD2_T(deallocate, void(T* p, size_t n));
-};
-
-template <typename Allocator> class allocator_ref {
- private:
-  Allocator* alloc_;
-
-  void move(allocator_ref& other) {
-    alloc_ = other.alloc_;
-    other.alloc_ = nullptr;
-  }
-
- public:
-  using value_type = typename Allocator::value_type;
-
-  explicit allocator_ref(Allocator* alloc = nullptr) : alloc_(alloc) {}
-
-  allocator_ref(const allocator_ref& other) : alloc_(other.alloc_) {}
-  allocator_ref(allocator_ref&& other) { move(other); }
-
-  allocator_ref& operator=(allocator_ref&& other) {
-    assert(this != &other);
-    move(other);
-    return *this;
-  }
-
-  allocator_ref& operator=(const allocator_ref& other) {
-    alloc_ = other.alloc_;
-    return *this;
-  }
-
- public:
-  Allocator* get() const { return alloc_; }
-
-  value_type* allocate(size_t n) {
-    return std::allocator_traits<Allocator>::allocate(*alloc_, n);
-  }
-  void deallocate(value_type* p, size_t n) { alloc_->deallocate(p, n); }
-};
-
-#endif  // FMT_MOCK_ALLOCATOR_H_
diff --git a/3rdparty/fmt/test/module-test.cc b/3rdparty/fmt/test/module-test.cc
deleted file mode 100644
index 39c83983..00000000
--- a/3rdparty/fmt/test/module-test.cc
+++ /dev/null
@@ -1,580 +0,0 @@
-// Formatting library for C++ - module tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-//
-// Copyright (c) 2021 - present, Daniela Engert
-// All Rights Reserved
-// {fmt} module.
-
-#ifdef _MSC_FULL_VER
-// hide some implementation bugs in msvc
-// that are not essential to users of the module.
-#  define FMT_HIDE_MODULE_BUGS
-#endif
-
-#define FMT_MODULE_TEST
-
-#include <bit>
-#include <chrono>
-#include <exception>
-#include <iterator>
-#include <locale>
-#include <memory>
-#include <ostream>
-#include <string>
-#include <string_view>
-#include <system_error>
-
-#if (__has_include(<fcntl.h>) || defined(__APPLE__) || \
-     defined(__linux__)) &&                              \
-    (!defined(WINAPI_FAMILY) || (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
-#  include <fcntl.h>
-#  define FMT_USE_FCNTL 1
-#else
-#  define FMT_USE_FCNTL 0
-#endif
-#define FMT_NOEXCEPT noexcept
-#if defined(_WIN32) && !defined(__MINGW32__)
-#  define FMT_POSIX(call) _##call
-#else
-#  define FMT_POSIX(call) call
-#endif
-#define FMT_OS_H_  // don't pull in os.h directly or indirectly
-
-import fmt;
-
-// check for macros leaking from BMI
-static bool macro_leaked =
-#if defined(FMT_CORE_H_) || defined(FMT_FORMAT_H_)
-    true;
-#else
-    false;
-#endif
-
-// Include sources to pick up functions and classes from the module rather than
-// from the non-modular library which is baked into the 'test-main' library.
-// This averts linker problems:
-// - strong ownership model: missing linker symbols
-// - weak ownership model: duplicate linker symbols
-#include "gtest-extra.cc"
-#include "util.cc"
-
-// an implicitly exported namespace must be visible [module.interface]/2.2
-TEST(module_test, namespace) {
-  using namespace fmt;
-  using namespace fmt::literals;
-  ASSERT_TRUE(true);
-}
-
-namespace detail {
-bool oops_detail_namespace_is_visible;
-}
-
-namespace fmt {
-bool namespace_detail_invisible() {
-#if defined(FMT_HIDE_MODULE_BUGS) && defined(_MSC_FULL_VER) && \
-    ((_MSC_VER == 1929 && _MSC_FULL_VER <= 192930136) ||       \
-     (_MSC_VER == 1930 && _MSC_FULL_VER <= 193030704))
-  // bug in msvc up to 16.11.5 / 17.0-pre5:
-
-  // the namespace is visible even when it is neither
-  // implicitly nor explicitly exported
-  return true;
-#else
-  using namespace detail;
-  // this fails to compile if fmt::detail is visible
-  return !oops_detail_namespace_is_visible;
-#endif
-}
-}  // namespace fmt
-
-// the non-exported namespace 'detail' must be invisible [module.interface]/2
-TEST(module_test, detail_namespace) {
-  EXPECT_TRUE(fmt::namespace_detail_invisible());
-}
-
-// macros must not be imported from a *named* module  [cpp.import]/5.1
-TEST(module_test, macros) {
-#if defined(FMT_HIDE_MODULE_BUGS) && defined(_MSC_FULL_VER) && \
-    _MSC_FULL_VER <= 192930130
-  // bug in msvc up to 16.11-pre2:
-  // include-guard macros leak from BMI
-  // and even worse: they cannot be #undef-ined
-  macro_leaked = false;
-#endif
-  EXPECT_FALSE(macro_leaked);
-}
-
-// The following is less about functional testing (that's done elsewhere)
-// but rather visibility of all client-facing overloads, reachability of
-// non-exported entities, name lookup and overload resolution within
-// template instantitions.
-// Excercise all exported entities of the API at least once.
-// Instantiate as many code paths as possible.
-
-TEST(module_test, to_string) {
-  EXPECT_EQ("42", fmt::to_string(42));
-  EXPECT_EQ("42", fmt::to_string(42.0));
-
-  EXPECT_EQ(L"42", fmt::to_wstring(42));
-  EXPECT_EQ(L"42", fmt::to_wstring(42.0));
-}
-
-TEST(module_test, format) {
-  EXPECT_EQ("42", fmt::format("{:}", 42));
-  EXPECT_EQ("-42", fmt::format("{0}", -42.0));
-
-  EXPECT_EQ(L"42", fmt::format(L"{:}", 42));
-  EXPECT_EQ(L"-42", fmt::format(L"{0}", -42.0));
-}
-
-TEST(module_test, format_to) {
-  std::string s;
-  fmt::format_to(std::back_inserter(s), "{}", 42);
-  EXPECT_EQ("42", s);
-
-  char buffer[4] = {0};
-  fmt::format_to(buffer, "{}", 42);
-  EXPECT_EQ("42", std::string_view(buffer));
-
-  fmt::memory_buffer mb;
-  fmt::format_to(mb, "{}", 42);
-  EXPECT_EQ("42", std::string_view(buffer));
-
-  std::wstring w;
-  fmt::format_to(std::back_inserter(w), L"{}", 42);
-  EXPECT_EQ(L"42", w);
-
-  wchar_t wbuffer[4] = {0};
-  fmt::format_to(wbuffer, L"{}", 42);
-  EXPECT_EQ(L"42", std::wstring_view(wbuffer));
-
-  fmt::wmemory_buffer wb;
-  fmt::format_to(wb, L"{}", 42);
-  EXPECT_EQ(L"42", std::wstring_view(wbuffer));
-}
-
-TEST(module_test, formatted_size) {
-  EXPECT_EQ(2u, fmt::formatted_size("{}", 42));
-  EXPECT_EQ(2u, fmt::formatted_size(L"{}", 42));
-}
-
-TEST(module_test, format_to_n) {
-  std::string s;
-  auto result = fmt::format_to_n(std::back_inserter(s), 1, "{}", 42);
-  EXPECT_EQ(2u, result.size);
-  char buffer[4] = {0};
-  fmt::format_to_n(buffer, 3, "{}", 12345);
-
-  std::wstring w;
-  auto wresult = fmt::format_to_n(std::back_inserter(w), 1, L"{}", 42);
-  EXPECT_EQ(2u, wresult.size);
-  wchar_t wbuffer[4] = {0};
-  fmt::format_to_n(wbuffer, 3, L"{}", 12345);
-}
-
-TEST(module_test, format_args) {
-  auto no_args = fmt::format_args();
-  EXPECT_FALSE(no_args.get(1));
-
-  fmt::basic_format_args args = fmt::make_format_args(42);
-  EXPECT_TRUE(args.max_size() > 0);
-  auto arg0 = args.get(0);
-  EXPECT_TRUE(arg0);
-  decltype(arg0) arg_none;
-  EXPECT_FALSE(arg_none);
-  EXPECT_TRUE(arg0.type() != arg_none.type());
-}
-
-TEST(module_test, wformat_args) {
-  auto no_args = fmt::wformat_args();
-  EXPECT_FALSE(no_args.get(1));
-  fmt::basic_format_args args = fmt::make_wformat_args(42);
-  EXPECT_TRUE(args.get(0));
-}
-
-TEST(module_test, checked_format_args) {
-  fmt::basic_format_args args = fmt::make_args_checked<int>("{}", 42);
-  EXPECT_TRUE(args.get(0));
-  fmt::basic_format_args wargs = fmt::make_args_checked<int>(L"{}", 42);
-  EXPECT_TRUE(wargs.get(0));
-}
-
-TEST(module_test, dynamic_format_args) {
-  fmt::dynamic_format_arg_store<fmt::format_context> dyn_store;
-  dyn_store.push_back(fmt::arg("a42", 42));
-  fmt::basic_format_args args = dyn_store;
-  EXPECT_FALSE(args.get(3));
-  EXPECT_TRUE(args.get(fmt::string_view("a42")));
-
-  fmt::dynamic_format_arg_store<fmt::wformat_context> wdyn_store;
-  wdyn_store.push_back(fmt::arg(L"a42", 42));
-  fmt::basic_format_args wargs = wdyn_store;
-  EXPECT_FALSE(wargs.get(3));
-  EXPECT_TRUE(wargs.get(fmt::wstring_view(L"a42")));
-}
-
-TEST(module_test, vformat) {
-  EXPECT_EQ("42", fmt::vformat("{}", fmt::make_format_args(42)));
-  EXPECT_EQ(L"42", fmt::vformat(fmt::to_string_view(L"{}"),
-                                fmt::make_wformat_args(42)));
-}
-
-TEST(module_test, vformat_to) {
-  auto store = fmt::make_format_args(42);
-  std::string s;
-  fmt::vformat_to(std::back_inserter(s), "{}", store);
-  EXPECT_EQ("42", s);
-
-  char buffer[4] = {0};
-  fmt::vformat_to(buffer, "{:}", store);
-  EXPECT_EQ("42", std::string_view(buffer));
-
-  auto wstore = fmt::make_wformat_args(42);
-  std::wstring w;
-  fmt::vformat_to(std::back_inserter(w), L"{}", wstore);
-  EXPECT_EQ(L"42", w);
-
-  wchar_t wbuffer[4] = {0};
-  fmt::vformat_to(wbuffer, L"{:}", wstore);
-  EXPECT_EQ(L"42", std::wstring_view(wbuffer));
-}
-
-TEST(module_test, vformat_to_n) {
-  auto store = fmt::make_format_args(12345);
-  std::string s;
-  auto result = fmt::vformat_to_n(std::back_inserter(s), 1, "{}", store);
-  char buffer[4] = {0};
-  fmt::vformat_to_n(buffer, 3, "{:}", store);
-
-  auto wstore = fmt::make_wformat_args(12345);
-  std::wstring w;
-  auto wresult = fmt::vformat_to_n(std::back_inserter(w), 1,
-                                   fmt::to_string_view(L"{}"), wstore);
-  wchar_t wbuffer[4] = {0};
-  fmt::vformat_to_n(wbuffer, 3, fmt::to_string_view(L"{:}"), wstore);
-}
-
-std::string as_string(std::wstring_view text) {
-  return {reinterpret_cast<const char*>(text.data()),
-          text.size() * sizeof(text[0])};
-}
-
-TEST(module_test, print) {
-  EXPECT_WRITE(stdout, fmt::print("{}µ", 42), "42µ");
-  EXPECT_WRITE(stderr, fmt::print(stderr, "{}µ", 4.2), "4.2µ");
-  if (false) {
-    EXPECT_WRITE(stdout, fmt::print(L"{}µ", 42), as_string(L"42µ"));
-    EXPECT_WRITE(stderr, fmt::print(stderr, L"{}µ", 4.2), as_string(L"4.2µ"));
-  }
-}
-
-TEST(module_test, vprint) {
-  EXPECT_WRITE(stdout, fmt::vprint("{:}µ", fmt::make_format_args(42)), "42µ");
-  EXPECT_WRITE(stderr, fmt::vprint(stderr, "{}", fmt::make_format_args(4.2)),
-               "4.2");
-  if (false) {
-    EXPECT_WRITE(stdout, fmt::vprint(L"{:}µ", fmt::make_wformat_args(42)),
-                 as_string(L"42µ"));
-    EXPECT_WRITE(stderr, fmt::vprint(stderr, L"{}", fmt::make_wformat_args(42)),
-                 as_string(L"42"));
-  }
-}
-
-TEST(module_test, named_args) {
-  EXPECT_EQ("42", fmt::format("{answer}", fmt::arg("answer", 42)));
-  EXPECT_EQ(L"42", fmt::format(L"{answer}", fmt::arg(L"answer", 42)));
-}
-
-TEST(module_test, literals) {
-  using namespace fmt::literals;
-  EXPECT_EQ("42", fmt::format("{answer}", "answer"_a = 42));
-  EXPECT_EQ("42", "{}"_format(42));
-  EXPECT_EQ(L"42", fmt::format(L"{answer}", L"answer"_a = 42));
-  EXPECT_EQ(L"42", L"{}"_format(42));
-}
-
-TEST(module_test, locale) {
-  auto store = fmt::make_format_args(4.2);
-  const auto classic = std::locale::classic();
-  EXPECT_EQ("4.2", fmt::format(classic, "{:L}", 4.2));
-  EXPECT_EQ("4.2", fmt::vformat(classic, "{:L}", store));
-  std::string s;
-  fmt::vformat_to(std::back_inserter(s), classic, "{:L}", store);
-  EXPECT_EQ("4.2", s);
-  EXPECT_EQ("4.2", fmt::format("{:L}", 4.2));
-
-  auto wstore = fmt::make_wformat_args(4.2);
-  EXPECT_EQ(L"4.2", fmt::format(classic, L"{:L}", 4.2));
-  EXPECT_EQ(L"4.2", fmt::vformat(classic, L"{:L}", wstore));
-  std::wstring w;
-  fmt::vformat_to(std::back_inserter(w), classic, L"{:L}", wstore);
-  EXPECT_EQ(L"4.2", w);
-  EXPECT_EQ(L"4.2", fmt::format(L"{:L}", 4.2));
-}
-
-TEST(module_test, string_view) {
-  fmt::string_view nsv("fmt");
-  EXPECT_EQ("fmt", nsv);
-  EXPECT_TRUE(fmt::string_view("fmt") == nsv);
-
-  fmt::wstring_view wsv(L"fmt");
-  EXPECT_EQ(L"fmt", wsv);
-  EXPECT_TRUE(fmt::wstring_view(L"fmt") == wsv);
-}
-
-TEST(module_test, memory_buffer) {
-  fmt::basic_memory_buffer<char, fmt::inline_buffer_size> buffer;
-  fmt::format_to(buffer, "{}", "42");
-  EXPECT_EQ("42", to_string(buffer));
-  fmt::memory_buffer nbuffer(std::move(buffer));
-  EXPECT_EQ("42", to_string(nbuffer));
-  buffer = std::move(nbuffer);
-  EXPECT_EQ("42", to_string(buffer));
-  nbuffer.clear();
-  EXPECT_EQ(0u, to_string(nbuffer).size());
-
-  fmt::wmemory_buffer wbuffer;
-  EXPECT_EQ(0u, to_string(wbuffer).size());
-}
-
-TEST(module_test, is_char) {
-  EXPECT_TRUE(fmt::is_char<char>());
-  EXPECT_TRUE(fmt::is_char<wchar_t>());
-  EXPECT_TRUE(fmt::is_char<char8_t>());
-  EXPECT_TRUE(fmt::is_char<char16_t>());
-  EXPECT_TRUE(fmt::is_char<char32_t>());
-  EXPECT_FALSE(fmt::is_char<signed char>());
-}
-
-TEST(module_test, ptr) {
-  uintptr_t answer = 42;
-  auto p = std::bit_cast<int*>(answer);
-  EXPECT_EQ("0x2a", fmt::to_string(fmt::ptr(p)));
-  std::unique_ptr<int> up(p);
-  EXPECT_EQ("0x2a", fmt::to_string(fmt::ptr(up)));
-  up.release();
-  auto sp = std::make_shared<int>(0);
-  p = sp.get();
-  EXPECT_EQ(fmt::to_string(fmt::ptr(p)), fmt::to_string(fmt::ptr(sp)));
-}
-
-TEST(module_test, errors) {
-  auto store = fmt::make_format_args(42);
-  EXPECT_THROW(throw fmt::format_error("oops"), std::exception);
-  EXPECT_THROW(throw fmt::vsystem_error(0, "{}", store), std::system_error);
-  EXPECT_THROW(throw fmt::system_error(0, "{}", 42), std::system_error);
-
-  fmt::memory_buffer buffer;
-  fmt::format_system_error(buffer, 0, "oops");
-  auto oops = to_string(buffer);
-  EXPECT_TRUE(oops.size() > 0);
-  EXPECT_WRITE(stderr, fmt::report_system_error(0, "oops"), oops + '\n');
-
-#ifdef _WIN32
-  EXPECT_THROW(throw fmt::vwindows_error(0, "{}", store), std::system_error);
-  EXPECT_THROW(throw fmt::windows_error(0, "{}", 42), std::system_error);
-  output_redirect redirect(stderr);
-  fmt::report_windows_error(0, "oops");
-  EXPECT_TRUE(redirect.restore_and_read().size() > 0);
-#endif
-}
-
-TEST(module_test, error_code) {
-  EXPECT_EQ("generic:42",
-            fmt::format("{0}", std::error_code(42, std::generic_category())));
-  EXPECT_EQ("system:42",
-            fmt::format("{0}", std::error_code(42, fmt::system_category())));
-  EXPECT_EQ(L"generic:42",
-            fmt::format(L"{0}", std::error_code(42, std::generic_category())));
-}
-
-TEST(module_test, format_int) {
-  fmt::format_int sanswer(42);
-  EXPECT_EQ("42", fmt::string_view(sanswer.data(), sanswer.size()));
-  fmt::format_int uanswer(42u);
-  EXPECT_EQ("42", fmt::string_view(uanswer.data(), uanswer.size()));
-}
-
-struct test_formatter : fmt::formatter<char> {
-  bool check() { return true; }
-};
-
-struct test_dynamic_formatter : fmt::dynamic_formatter<> {
-  bool check() { return true; }
-};
-
-TEST(module_test, formatter) {
-  EXPECT_TRUE(test_formatter{}.check());
-  EXPECT_TRUE(test_dynamic_formatter{}.check());
-}
-
-TEST(module_test, join) {
-  int arr[3] = {1, 2, 3};
-  std::vector<double> vec{1.0, 2.0, 3.0};
-  std::initializer_list<int> il{1, 2, 3};
-  auto sep = fmt::to_string_view(", ");
-  EXPECT_EQ("1, 2, 3", to_string(fmt::join(arr + 0, arr + 3, sep)));
-  EXPECT_EQ("1, 2, 3", to_string(fmt::join(arr, sep)));
-  EXPECT_EQ("1, 2, 3", to_string(fmt::join(vec.begin(), vec.end(), sep)));
-  EXPECT_EQ("1, 2, 3", to_string(fmt::join(vec, sep)));
-  EXPECT_EQ("1, 2, 3", to_string(fmt::join(il, sep)));
-
-  auto wsep = fmt::to_string_view(L", ");
-  EXPECT_EQ(L"1, 2, 3", fmt::format(L"{}", fmt::join(arr + 0, arr + 3, wsep)));
-  EXPECT_EQ(L"1, 2, 3", fmt::format(L"{}", fmt::join(arr, wsep)));
-  EXPECT_EQ(L"1, 2, 3", fmt::format(L"{}", fmt::join(il, wsep)));
-}
-
-TEST(module_test, time) {
-  auto time_now = std::time(nullptr);
-  EXPECT_TRUE(fmt::localtime(time_now).tm_year > 120);
-  EXPECT_TRUE(fmt::gmtime(time_now).tm_year > 120);
-  auto chrono_now = std::chrono::system_clock::now();
-  EXPECT_TRUE(fmt::localtime(chrono_now).tm_year > 120);
-  EXPECT_TRUE(fmt::gmtime(chrono_now).tm_year > 120);
-}
-
-TEST(module_test, time_point) {
-  auto now = std::chrono::system_clock::now();
-  std::string_view past("2021-05-20 10:30:15");
-  EXPECT_TRUE(past < fmt::format("{:%Y-%m-%d %H:%M:%S}", now));
-  std::wstring_view wpast(L"2021-05-20 10:30:15");
-  EXPECT_TRUE(wpast < fmt::format(L"{:%Y-%m-%d %H:%M:%S}", now));
-}
-
-TEST(module_test, time_duration) {
-  using us = std::chrono::duration<double, std::micro>;
-  EXPECT_EQ("42s", fmt::format("{}", std::chrono::seconds{42}));
-  EXPECT_EQ("4.2µs", fmt::format("{:3.1}", us{4.234}));
-  EXPECT_EQ("4.2µs", fmt::format(std::locale::classic(), "{:L}", us{4.2}));
-
-  EXPECT_EQ(L"42s", fmt::format(L"{}", std::chrono::seconds{42}));
-  EXPECT_EQ(L"4.2µs", fmt::format(L"{:3.1}", us{4.234}));
-  EXPECT_EQ(L"4.2µs", fmt::format(std::locale::classic(), L"{:L}", us{4.2}));
-}
-
-TEST(module_test, weekday) {
-  EXPECT_EQ("Mon", fmt::format(std::locale::classic(), "{}", fmt::weekday(1)));
-}
-
-TEST(module_test, to_string_view) {
-  using fmt::to_string_view;
-  fmt::string_view nsv{to_string_view("42")};
-  EXPECT_EQ("42", nsv);
-  fmt::wstring_view wsv{to_string_view(L"42")};
-  EXPECT_EQ(L"42", wsv);
-}
-
-TEST(module_test, printf) {
-  EXPECT_WRITE(stdout, fmt::printf("%f", 42.123456), "42.123456");
-  EXPECT_WRITE(stdout, fmt::printf("%d", 42), "42");
-  if (false) {
-    EXPECT_WRITE(stdout, fmt::printf(L"%f", 42.123456),
-                 as_string(L"42.123456"));
-    EXPECT_WRITE(stdout, fmt::printf(L"%d", 42), as_string(L"42"));
-  }
-}
-
-TEST(module_test, fprintf) {
-  EXPECT_WRITE(stderr, fmt::fprintf(stderr, "%d", 42), "42");
-  std::ostringstream os;
-  fmt::fprintf(os, "%s", "bla");
-  EXPECT_EQ("bla", os.str());
-
-  EXPECT_WRITE(stderr, fmt::fprintf(stderr, L"%d", 42), as_string(L"42"));
-  std::wostringstream ws;
-  fmt::fprintf(ws, L"%s", L"bla");
-  EXPECT_EQ(L"bla", ws.str());
-}
-
-TEST(module_test, sprintf) {
-  EXPECT_EQ("42", fmt::sprintf("%d", 42));
-  EXPECT_EQ(L"42", fmt::sprintf(L"%d", 42));
-}
-
-TEST(module_test, vprintf) {
-  EXPECT_WRITE(stdout, fmt::vprintf("%d", fmt::make_printf_args(42)), "42");
-  if (false) {
-    EXPECT_WRITE(stdout, fmt::vprintf(L"%d", fmt::make_wprintf_args(42)),
-                 as_string(L"42"));
-  }
-}
-
-TEST(module_test, vfprintf) {
-  auto args = fmt::make_printf_args(42);
-  EXPECT_WRITE(stderr, fmt::vfprintf(stderr, "%d", args), "42");
-  std::ostringstream os;
-  fmt::vfprintf(os, "%d", args);
-  EXPECT_EQ("42", os.str());
-  auto wargs = fmt::make_wprintf_args(42);
-  if (false) {
-    EXPECT_WRITE(stderr, fmt::vfprintf(stderr, L"%d", wargs), as_string(L"42"));
-  }
-  std::wostringstream ws;
-  fmt::vfprintf(ws, L"%d", wargs);
-  EXPECT_EQ(L"42", ws.str());
-}
-
-TEST(module_test, vsprintf) {
-  EXPECT_EQ("42", fmt::vsprintf("%d", fmt::make_printf_args(42)));
-  EXPECT_EQ(L"42", fmt::vsprintf(L"%d", fmt::make_wprintf_args(42)));
-}
-
-TEST(module_test, color) {
-  auto fg_check = fg(fmt::rgb(255, 200, 30));
-  auto bg_check = bg(fmt::color::dark_slate_gray) | fmt::emphasis::italic;
-  auto emphasis_check = fmt::emphasis::underline | fmt::emphasis::bold;
-  EXPECT_EQ("\x1B[30m42\x1B[0m",
-            fmt::format(fg(fmt::terminal_color::black), "{}", 42));
-  EXPECT_EQ(L"\x1B[30m42\x1B[0m",
-            fmt::format(fg(fmt::terminal_color::black), L"{}", 42));
-}
-
-TEST(module_test, cstring_view) {
-  auto s = "fmt";
-  EXPECT_EQ(s, fmt::cstring_view(s).c_str());
-  auto w = L"fmt";
-  EXPECT_EQ(w, fmt::wcstring_view(w).c_str());
-}
-
-TEST(module_test, buffered_file) {
-  EXPECT_TRUE(fmt::buffered_file{}.get() == nullptr);
-}
-
-TEST(module_test, output_file) {
-  fmt::ostream out = fmt::output_file("module-test", fmt::buffer_size = 1);
-  out.close();
-}
-
-struct custom_context {
-  using char_type = char;
-  using parse_context_type = fmt::format_parse_context;
-};
-
-TEST(module_test, custom_context) {
-  fmt::basic_format_arg<custom_context> custom_arg;
-  EXPECT_TRUE(!custom_arg);
-}
-
-struct disabled_formatter {};
-
-TEST(module_test, has_formatter) {
-  EXPECT_FALSE(
-      (fmt::has_formatter<disabled_formatter, fmt::format_context>::value));
-}
-
-TEST(module_test, is_formattable) {
-  EXPECT_FALSE(fmt::is_formattable<disabled_formatter>::value);
-}
-
-TEST(module_test, compile_format_string) {
-  using namespace fmt::literals;
-  EXPECT_EQ("42", fmt::format("{0:x}"_cf, 0x42));
-  EXPECT_EQ(L"42", fmt::format(L"{:}"_cf, 42));
-  EXPECT_EQ("4.2", fmt::format("{arg:3.1f}"_cf, "arg"_a = 4.2));
-  EXPECT_EQ(L" 42", fmt::format(L"{arg:>3}"_cf, L"arg"_a = L"42"));
-}
diff --git a/3rdparty/fmt/test/noexception-test.cc b/3rdparty/fmt/test/noexception-test.cc
deleted file mode 100644
index bf3472fd..00000000
--- a/3rdparty/fmt/test/noexception-test.cc
+++ /dev/null
@@ -1,18 +0,0 @@
-// Formatting library for C++ - Noexception tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "fmt/args.h"
-#include "fmt/chrono.h"
-#include "fmt/color.h"
-#include "fmt/compile.h"
-#include "fmt/core.h"
-#include "fmt/format.h"
-#include "fmt/os.h"
-#include "fmt/ostream.h"
-#include "fmt/printf.h"
-#include "fmt/ranges.h"
-#include "fmt/xchar.h"
diff --git a/3rdparty/fmt/test/os-test.cc b/3rdparty/fmt/test/os-test.cc
deleted file mode 100644
index 5b5ef76e..00000000
--- a/3rdparty/fmt/test/os-test.cc
+++ /dev/null
@@ -1,551 +0,0 @@
-// Formatting library for C++ - tests of the OS-specific functionality
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "fmt/os.h"
-
-#include <cstdlib>  // std::exit
-#include <cstring>
-#include <memory>
-
-#include "gtest-extra.h"
-#include "util.h"
-
-#ifdef fileno
-#  undef fileno
-#endif
-
-using fmt::buffered_file;
-using testing::HasSubstr;
-using wstring_view = fmt::basic_string_view<wchar_t>;
-
-#ifdef _WIN32
-
-#  include <windows.h>
-
-TEST(util_test, utf16_to_utf8) {
-  auto s = std::string("ёжик");
-  fmt::detail::utf16_to_utf8 u(L"\x0451\x0436\x0438\x043A");
-  EXPECT_EQ(s, u.str());
-  EXPECT_EQ(s.size(), u.size());
-}
-
-TEST(util_test, utf16_to_utf8_empty_string) {
-  std::string s = "";
-  fmt::detail::utf16_to_utf8 u(L"");
-  EXPECT_EQ(s, u.str());
-  EXPECT_EQ(s.size(), u.size());
-}
-
-template <typename Converter, typename Char>
-void check_utf_conversion_error(const char* message,
-                                fmt::basic_string_view<Char> str =
-                                    fmt::basic_string_view<Char>(nullptr, 1)) {
-  fmt::memory_buffer out;
-  fmt::detail::format_windows_error(out, ERROR_INVALID_PARAMETER, message);
-  auto error = std::system_error(std::error_code());
-  try {
-    (Converter)(str);
-  } catch (const std::system_error& e) {
-    error = e;
-  }
-  EXPECT_EQ(ERROR_INVALID_PARAMETER, error.code().value());
-  EXPECT_THAT(error.what(), HasSubstr(fmt::to_string(out)));
-}
-
-TEST(util_test, utf16_to_utf8_error) {
-  check_utf_conversion_error<fmt::detail::utf16_to_utf8, wchar_t>(
-      "cannot convert string from UTF-16 to UTF-8");
-}
-
-TEST(util_test, utf16_to_utf8_convert) {
-  fmt::detail::utf16_to_utf8 u;
-  EXPECT_EQ(ERROR_INVALID_PARAMETER, u.convert(wstring_view(nullptr, 1)));
-  EXPECT_EQ(ERROR_INVALID_PARAMETER,
-            u.convert(wstring_view(L"foo", INT_MAX + 1u)));
-}
-
-TEST(os_test, format_std_error_code) {
-  EXPECT_EQ("generic:42",
-            fmt::format(FMT_STRING("{0}"),
-                        std::error_code(42, std::generic_category())));
-  EXPECT_EQ("system:42",
-            fmt::format(FMT_STRING("{0}"),
-                        std::error_code(42, fmt::system_category())));
-  EXPECT_EQ("system:-42",
-            fmt::format(FMT_STRING("{0}"),
-                        std::error_code(-42, fmt::system_category())));
-}
-
-TEST(os_test, format_windows_error) {
-  LPWSTR message = nullptr;
-  auto result = FormatMessageW(
-      FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
-          FORMAT_MESSAGE_IGNORE_INSERTS,
-      nullptr, ERROR_FILE_EXISTS, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-      reinterpret_cast<LPWSTR>(&message), 0, nullptr);
-  fmt::detail::utf16_to_utf8 utf8_message(wstring_view(message, result - 2));
-  LocalFree(message);
-  fmt::memory_buffer actual_message;
-  fmt::detail::format_windows_error(actual_message, ERROR_FILE_EXISTS, "test");
-  EXPECT_EQ(fmt::format("test: {}", utf8_message.str()),
-            fmt::to_string(actual_message));
-  actual_message.resize(0);
-}
-
-TEST(os_test, format_long_windows_error) {
-  LPWSTR message = nullptr;
-  // this error code is not available on all Windows platforms and
-  // Windows SDKs, so do not fail the test if the error string cannot
-  // be retrieved.
-  int provisioning_not_allowed = 0x80284013L;  // TBS_E_PROVISIONING_NOT_ALLOWED
-  auto result = FormatMessageW(
-      FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
-          FORMAT_MESSAGE_IGNORE_INSERTS,
-      nullptr, static_cast<DWORD>(provisioning_not_allowed),
-      MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-      reinterpret_cast<LPWSTR>(&message), 0, nullptr);
-  if (result == 0) {
-    LocalFree(message);
-    return;
-  }
-  fmt::detail::utf16_to_utf8 utf8_message(wstring_view(message, result - 2));
-  LocalFree(message);
-  fmt::memory_buffer actual_message;
-  fmt::detail::format_windows_error(actual_message, provisioning_not_allowed,
-                                    "test");
-  EXPECT_EQ(fmt::format("test: {}", utf8_message.str()),
-            fmt::to_string(actual_message));
-}
-
-TEST(os_test, windows_error) {
-  auto error = std::system_error(std::error_code());
-  try {
-    throw fmt::windows_error(ERROR_FILE_EXISTS, "test {}", "error");
-  } catch (const std::system_error& e) {
-    error = e;
-  }
-  fmt::memory_buffer message;
-  fmt::detail::format_windows_error(message, ERROR_FILE_EXISTS, "test error");
-  EXPECT_THAT(error.what(), HasSubstr(to_string(message)));
-  EXPECT_EQ(ERROR_FILE_EXISTS, error.code().value());
-}
-
-TEST(os_test, report_windows_error) {
-  fmt::memory_buffer out;
-  fmt::detail::format_windows_error(out, ERROR_FILE_EXISTS, "test error");
-  out.push_back('\n');
-  EXPECT_WRITE(stderr,
-               fmt::report_windows_error(ERROR_FILE_EXISTS, "test error"),
-               fmt::to_string(out));
-}
-
-#endif  // _WIN32
-
-#if FMT_USE_FCNTL
-
-using fmt::file;
-
-bool isclosed(int fd) {
-  char buffer;
-  auto result = std::streamsize();
-  SUPPRESS_ASSERT(result = FMT_POSIX(read(fd, &buffer, 1)));
-  return result == -1 && errno == EBADF;
-}
-
-// Opens a file for reading.
-file open_file() {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  write_end.write(file_content, std::strlen(file_content));
-  write_end.close();
-  return read_end;
-}
-
-// Attempts to write a string to a file.
-void write(file& f, fmt::string_view s) {
-  size_t num_chars_left = s.size();
-  const char* ptr = s.data();
-  do {
-    size_t count = f.write(ptr, num_chars_left);
-    ptr += count;
-    // We can't write more than size_t bytes since num_chars_left
-    // has type size_t.
-    num_chars_left -= count;
-  } while (num_chars_left != 0);
-}
-
-TEST(buffered_file_test, default_ctor) {
-  auto f = buffered_file();
-  EXPECT_TRUE(f.get() == nullptr);
-}
-
-TEST(buffered_file_test, move_ctor) {
-  buffered_file bf = open_buffered_file();
-  FILE* fp = bf.get();
-  EXPECT_TRUE(fp != nullptr);
-  buffered_file bf2(std::move(bf));
-  EXPECT_EQ(fp, bf2.get());
-  EXPECT_TRUE(bf.get() == nullptr);
-}
-
-TEST(buffered_file_test, move_assignment) {
-  buffered_file bf = open_buffered_file();
-  FILE* fp = bf.get();
-  EXPECT_TRUE(fp != nullptr);
-  buffered_file bf2;
-  bf2 = std::move(bf);
-  EXPECT_EQ(fp, bf2.get());
-  EXPECT_TRUE(bf.get() == nullptr);
-}
-
-TEST(buffered_file_test, move_assignment_closes_file) {
-  buffered_file bf = open_buffered_file();
-  buffered_file bf2 = open_buffered_file();
-  int old_fd = bf2.fileno();
-  bf2 = std::move(bf);
-  EXPECT_TRUE(isclosed(old_fd));
-}
-
-TEST(buffered_file_test, move_from_temporary_in_ctor) {
-  FILE* fp = nullptr;
-  buffered_file f = open_buffered_file(&fp);
-  EXPECT_EQ(fp, f.get());
-}
-
-TEST(buffered_file_test, move_from_temporary_in_assignment) {
-  FILE* fp = nullptr;
-  auto f = buffered_file();
-  f = open_buffered_file(&fp);
-  EXPECT_EQ(fp, f.get());
-}
-
-TEST(buffered_file_test, move_from_temporary_in_assignment_closes_file) {
-  buffered_file f = open_buffered_file();
-  int old_fd = f.fileno();
-  f = open_buffered_file();
-  EXPECT_TRUE(isclosed(old_fd));
-}
-
-TEST(buffered_file_test, close_file_in_dtor) {
-  int fd = 0;
-  {
-    buffered_file f = open_buffered_file();
-    fd = f.fileno();
-  }
-  EXPECT_TRUE(isclosed(fd));
-}
-
-TEST(buffered_file_test, close_error_in_dtor) {
-  auto f =
-      std::unique_ptr<buffered_file>(new buffered_file(open_buffered_file()));
-  EXPECT_WRITE(
-      stderr,
-      {
-        // The close function must be called inside EXPECT_WRITE,
-        // otherwise the system may recycle closed file descriptor when
-        // redirecting the output in EXPECT_STDERR and the second close
-        // will break output redirection.
-        FMT_POSIX(close(f->fileno()));
-        SUPPRESS_ASSERT(f.reset(nullptr));
-      },
-      system_error_message(EBADF, "cannot close file") + "\n");
-}
-
-TEST(buffered_file_test, close) {
-  buffered_file f = open_buffered_file();
-  int fd = f.fileno();
-  f.close();
-  EXPECT_TRUE(f.get() == nullptr);
-  EXPECT_TRUE(isclosed(fd));
-}
-
-TEST(buffered_file_test, close_error) {
-  buffered_file f = open_buffered_file();
-  FMT_POSIX(close(f.fileno()));
-  EXPECT_SYSTEM_ERROR_NOASSERT(f.close(), EBADF, "cannot close file");
-  EXPECT_TRUE(f.get() == nullptr);
-}
-
-TEST(buffered_file_test, fileno) {
-  auto f = open_buffered_file();
-  EXPECT_TRUE(f.fileno() != -1);
-  file copy = file::dup(f.fileno());
-  EXPECT_READ(copy, file_content);
-}
-
-TEST(ostream_test, move) {
-  fmt::ostream out = fmt::output_file("test-file");
-  fmt::ostream moved(std::move(out));
-  moved.print("hello");
-}
-
-TEST(ostream_test, move_while_holding_data) {
-  {
-    fmt::ostream out = fmt::output_file("test-file");
-    out.print("Hello, ");
-    fmt::ostream moved(std::move(out));
-    moved.print("world!\n");
-  }
-  {
-    file in("test-file", file::RDONLY);
-    EXPECT_READ(in, "Hello, world!\n");
-  }
-}
-
-TEST(ostream_test, print) {
-  fmt::ostream out = fmt::output_file("test-file");
-  out.print("The answer is {}.\n",
-            fmt::join(std::initializer_list<int>{42}, ", "));
-  out.close();
-  file in("test-file", file::RDONLY);
-  EXPECT_READ(in, "The answer is 42.\n");
-}
-
-TEST(ostream_test, buffer_boundary) {
-  auto str = std::string(4096, 'x');
-  fmt::ostream out = fmt::output_file("test-file");
-  out.print("{}", str);
-  out.print("{}", str);
-  out.close();
-  file in("test-file", file::RDONLY);
-  EXPECT_READ(in, str + str);
-}
-
-TEST(ostream_test, buffer_size) {
-  fmt::ostream out = fmt::output_file("test-file", fmt::buffer_size = 1);
-  out.print("{}", "foo");
-  out.close();
-  file in("test-file", file::RDONLY);
-  EXPECT_READ(in, "foo");
-}
-
-TEST(ostream_test, truncate) {
-  {
-    fmt::ostream out = fmt::output_file("test-file");
-    out.print("0123456789");
-  }
-  {
-    fmt::ostream out = fmt::output_file("test-file");
-    out.print("foo");
-  }
-  file in("test-file", file::RDONLY);
-  EXPECT_EQ("foo", read(in, 4));
-}
-
-TEST(ostream_test, flush) {
-  auto out = fmt::output_file("test-file");
-  out.print("x");
-  out.flush();
-  auto in = fmt::file("test-file", file::RDONLY);
-  EXPECT_READ(in, "x");
-}
-
-TEST(file_test, default_ctor) {
-  file f;
-  EXPECT_EQ(-1, f.descriptor());
-}
-
-TEST(file_test, open_buffered_file_in_ctor) {
-  FILE* fp = safe_fopen("test-file", "w");
-  std::fputs(file_content, fp);
-  std::fclose(fp);
-  file f("test-file", file::RDONLY);
-  // Check if the file is open by reading one character from it.
-  char buffer;
-  bool isopen = FMT_POSIX(read(f.descriptor(), &buffer, 1)) == 1;
-  ASSERT_TRUE(isopen);
-}
-
-TEST(file_test, open_buffered_file_error) {
-  EXPECT_SYSTEM_ERROR(file("nonexistent", file::RDONLY), ENOENT,
-                      "cannot open file nonexistent");
-}
-
-TEST(file_test, move_ctor) {
-  file f = open_file();
-  int fd = f.descriptor();
-  EXPECT_NE(-1, fd);
-  file f2(std::move(f));
-  EXPECT_EQ(fd, f2.descriptor());
-  EXPECT_EQ(-1, f.descriptor());
-}
-
-TEST(file_test, move_assignment) {
-  file f = open_file();
-  int fd = f.descriptor();
-  EXPECT_NE(-1, fd);
-  file f2;
-  f2 = std::move(f);
-  EXPECT_EQ(fd, f2.descriptor());
-  EXPECT_EQ(-1, f.descriptor());
-}
-
-TEST(file_test, move_assignment_closes_file) {
-  file f = open_file();
-  file f2 = open_file();
-  int old_fd = f2.descriptor();
-  f2 = std::move(f);
-  EXPECT_TRUE(isclosed(old_fd));
-}
-
-file open_buffered_file(int& fd) {
-  file f = open_file();
-  fd = f.descriptor();
-  return f;
-}
-
-TEST(file_test, move_from_temporary_in_ctor) {
-  int fd = 0xdead;
-  file f(open_buffered_file(fd));
-  EXPECT_EQ(fd, f.descriptor());
-}
-
-TEST(file_test, move_from_temporary_in_assignment) {
-  int fd = 0xdead;
-  file f;
-  f = open_buffered_file(fd);
-  EXPECT_EQ(fd, f.descriptor());
-}
-
-TEST(file_test, move_from_temporary_in_assignment_closes_file) {
-  int fd = 0xdead;
-  file f = open_file();
-  int old_fd = f.descriptor();
-  f = open_buffered_file(fd);
-  EXPECT_TRUE(isclosed(old_fd));
-}
-
-TEST(file_test, close_file_in_dtor) {
-  int fd = 0;
-  {
-    file f = open_file();
-    fd = f.descriptor();
-  }
-  EXPECT_TRUE(isclosed(fd));
-}
-
-TEST(file_test, close_error_in_dtor) {
-  std::unique_ptr<file> f(new file(open_file()));
-  EXPECT_WRITE(
-      stderr,
-      {
-        // The close function must be called inside EXPECT_WRITE,
-        // otherwise the system may recycle closed file descriptor when
-        // redirecting the output in EXPECT_STDERR and the second close
-        // will break output redirection.
-        FMT_POSIX(close(f->descriptor()));
-        SUPPRESS_ASSERT(f.reset(nullptr));
-      },
-      system_error_message(EBADF, "cannot close file") + "\n");
-}
-
-TEST(file_test, close) {
-  file f = open_file();
-  int fd = f.descriptor();
-  f.close();
-  EXPECT_EQ(-1, f.descriptor());
-  EXPECT_TRUE(isclosed(fd));
-}
-
-TEST(file_test, close_error) {
-  file f = open_file();
-  FMT_POSIX(close(f.descriptor()));
-  EXPECT_SYSTEM_ERROR_NOASSERT(f.close(), EBADF, "cannot close file");
-  EXPECT_EQ(-1, f.descriptor());
-}
-
-TEST(file_test, read) {
-  file f = open_file();
-  EXPECT_READ(f, file_content);
-}
-
-TEST(file_test, read_error) {
-  file f("test-file", file::WRONLY);
-  char buf;
-  // We intentionally read from a file opened in the write-only mode to
-  // cause error.
-  EXPECT_SYSTEM_ERROR(f.read(&buf, 1), EBADF, "cannot read from file");
-}
-
-TEST(file_test, write) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  write(write_end, "test");
-  write_end.close();
-  EXPECT_READ(read_end, "test");
-}
-
-TEST(file_test, write_error) {
-  file f("test-file", file::RDONLY);
-  // We intentionally write to a file opened in the read-only mode to
-  // cause error.
-  EXPECT_SYSTEM_ERROR(f.write(" ", 1), EBADF, "cannot write to file");
-}
-
-TEST(file_test, dup) {
-  file f = open_file();
-  file copy = file::dup(f.descriptor());
-  EXPECT_NE(f.descriptor(), copy.descriptor());
-  EXPECT_EQ(file_content, read(copy, std::strlen(file_content)));
-}
-
-#  ifndef __COVERITY__
-TEST(file_test, dup_error) {
-  int value = -1;
-  EXPECT_SYSTEM_ERROR_NOASSERT(file::dup(value), EBADF,
-                               "cannot duplicate file descriptor -1");
-}
-#  endif
-
-TEST(file_test, dup2) {
-  file f = open_file();
-  file copy = open_file();
-  f.dup2(copy.descriptor());
-  EXPECT_NE(f.descriptor(), copy.descriptor());
-  EXPECT_READ(copy, file_content);
-}
-
-TEST(file_test, dup2_error) {
-  file f = open_file();
-  EXPECT_SYSTEM_ERROR_NOASSERT(
-      f.dup2(-1), EBADF,
-      fmt::format("cannot duplicate file descriptor {} to -1", f.descriptor()));
-}
-
-TEST(file_test, dup2_noexcept) {
-  file f = open_file();
-  file copy = open_file();
-  std::error_code ec;
-  f.dup2(copy.descriptor(), ec);
-  EXPECT_EQ(ec.value(), 0);
-  EXPECT_NE(f.descriptor(), copy.descriptor());
-  EXPECT_READ(copy, file_content);
-}
-
-TEST(file_test, dup2_noexcept_error) {
-  file f = open_file();
-  std::error_code ec;
-  SUPPRESS_ASSERT(f.dup2(-1, ec));
-  EXPECT_EQ(EBADF, ec.value());
-}
-
-TEST(file_test, pipe) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  EXPECT_NE(-1, read_end.descriptor());
-  EXPECT_NE(-1, write_end.descriptor());
-  write(write_end, "test");
-  EXPECT_READ(read_end, "test");
-}
-
-TEST(file_test, fdopen) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  int read_fd = read_end.descriptor();
-  EXPECT_EQ(read_fd, FMT_POSIX(fileno(read_end.fdopen("r").get())));
-}
-#endif  // FMT_USE_FCNTL
diff --git a/3rdparty/fmt/test/ostream-test.cc b/3rdparty/fmt/test/ostream-test.cc
deleted file mode 100644
index f81039e5..00000000
--- a/3rdparty/fmt/test/ostream-test.cc
+++ /dev/null
@@ -1,301 +0,0 @@
-// Formatting library for C++ - std::ostream support tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "fmt/format.h"
-
-using fmt::runtime;
-
-struct test {};
-
-// Test that there is no issues with specializations when fmt/ostream.h is
-// included after fmt/format.h.
-namespace fmt {
-template <> struct formatter<test> : formatter<int> {
-  auto format(const test&, format_context& ctx) -> decltype(ctx.out()) {
-    return formatter<int>::format(42, ctx);
-  }
-};
-}  // namespace fmt
-
-#include <sstream>
-
-#include "fmt/compile.h"
-#include "fmt/ostream.h"
-#include "fmt/ranges.h"
-#include "gmock/gmock.h"
-#include "gtest-extra.h"
-#include "util.h"
-
-std::ostream& operator<<(std::ostream& os, const date& d) {
-  os << d.year() << '-' << d.month() << '-' << d.day();
-  return os;
-}
-
-std::wostream& operator<<(std::wostream& os, const date& d) {
-  os << d.year() << L'-' << d.month() << L'-' << d.day();
-  return os;
-}
-
-// Make sure that overloaded comma operators do no harm to is_streamable.
-struct type_with_comma_op {};
-template <typename T> void operator,(type_with_comma_op, const T&);
-template <typename T> type_with_comma_op operator<<(T&, const date&);
-
-enum streamable_enum {};
-
-std::ostream& operator<<(std::ostream& os, streamable_enum) {
-  return os << "streamable_enum";
-}
-
-enum unstreamable_enum {};
-
-TEST(ostream_test, enum) {
-  EXPECT_EQ("streamable_enum", fmt::format("{}", streamable_enum()));
-  EXPECT_EQ("0", fmt::format("{}", unstreamable_enum()));
-}
-
-TEST(ostream_test, format) {
-  EXPECT_EQ("a string", fmt::format("{0}", test_string("a string")));
-  EXPECT_EQ("The date is 2012-12-9",
-            fmt::format("The date is {0}", date(2012, 12, 9)));
-}
-
-TEST(ostream_test, format_specs) {
-  using fmt::format_error;
-  EXPECT_EQ("def  ", fmt::format("{0:<5}", test_string("def")));
-  EXPECT_EQ("  def", fmt::format("{0:>5}", test_string("def")));
-  EXPECT_EQ(" def ", fmt::format("{0:^5}", test_string("def")));
-  EXPECT_EQ("def**", fmt::format("{0:*<5}", test_string("def")));
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), test_string()),
-                   format_error, "format specifier requires numeric argument");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), test_string()),
-                   format_error, "format specifier requires numeric argument");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), test_string()),
-                   format_error, "format specifier requires numeric argument");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:#}"), test_string()),
-                   format_error, "format specifier requires numeric argument");
-  EXPECT_THROW_MSG((void)fmt::format(runtime("{0:05}"), test_string()),
-                   format_error, "format specifier requires numeric argument");
-  EXPECT_EQ("test         ", fmt::format("{0:13}", test_string("test")));
-  EXPECT_EQ("test         ", fmt::format("{0:{1}}", test_string("test"), 13));
-  EXPECT_EQ("te", fmt::format("{0:.2}", test_string("test")));
-  EXPECT_EQ("te", fmt::format("{0:.{1}}", test_string("test"), 2));
-}
-
-struct empty_test {};
-std::ostream& operator<<(std::ostream& os, empty_test) { return os << ""; }
-
-TEST(ostream_test, empty_custom_output) {
-  EXPECT_EQ("", fmt::format("{}", empty_test()));
-}
-
-TEST(ostream_test, print) {
-  std::ostringstream os;
-  fmt::print(os, "Don't {}!", "panic");
-  EXPECT_EQ("Don't panic!", os.str());
-}
-
-TEST(ostream_test, write_to_ostream) {
-  std::ostringstream os;
-  fmt::memory_buffer buffer;
-  const char* foo = "foo";
-  buffer.append(foo, foo + std::strlen(foo));
-  fmt::detail::write_buffer(os, buffer);
-  EXPECT_EQ("foo", os.str());
-}
-
-TEST(ostream_test, write_to_ostream_max_size) {
-  auto max_size = fmt::detail::max_value<size_t>();
-  auto max_streamsize = fmt::detail::max_value<std::streamsize>();
-  if (max_size <= fmt::detail::to_unsigned(max_streamsize)) return;
-
-  struct test_buffer final : fmt::detail::buffer<char> {
-    explicit test_buffer(size_t size)
-        : fmt::detail::buffer<char>(nullptr, size, size) {}
-    void grow(size_t) override {}
-  } buffer(max_size);
-
-  struct mock_streambuf : std::streambuf {
-    MOCK_METHOD2(xsputn, std::streamsize(const void* s, std::streamsize n));
-    std::streamsize xsputn(const char* s, std::streamsize n) override {
-      const void* v = s;
-      return xsputn(v, n);
-    }
-  } streambuf;
-
-  struct test_ostream : std::ostream {
-    explicit test_ostream(mock_streambuf& output_buffer)
-        : std::ostream(&output_buffer) {}
-  } os(streambuf);
-
-  testing::InSequence sequence;
-  const char* data = nullptr;
-  using ustreamsize = std::make_unsigned<std::streamsize>::type;
-  ustreamsize size = max_size;
-  do {
-    auto n = std::min(size, fmt::detail::to_unsigned(max_streamsize));
-    EXPECT_CALL(streambuf, xsputn(data, static_cast<std::streamsize>(n)))
-        .WillOnce(testing::Return(max_streamsize));
-    data += n;
-    size -= n;
-  } while (size != 0);
-  fmt::detail::write_buffer(os, buffer);
-}
-
-TEST(ostream_test, join) {
-  int v[3] = {1, 2, 3};
-  EXPECT_EQ("1, 2, 3", fmt::format("{}", fmt::join(v, v + 3, ", ")));
-}
-
-TEST(ostream_test, join_fallback_formatter) {
-  auto strs = std::vector<test_string>{test_string("foo"), test_string("bar")};
-  EXPECT_EQ("foo, bar", fmt::format("{}", fmt::join(strs, ", ")));
-}
-
-#if FMT_USE_CONSTEXPR
-TEST(ostream_test, constexpr_string) {
-  EXPECT_EQ("42", format(FMT_STRING("{}"), std::string("42")));
-  EXPECT_EQ("a string", format(FMT_STRING("{0}"), test_string("a string")));
-}
-#endif
-
-namespace fmt_test {
-struct abc {};
-
-template <typename Output> Output& operator<<(Output& out, abc) {
-  return out << "abc";
-}
-}  // namespace fmt_test
-
-template <typename T> struct test_template {};
-
-template <typename T>
-std::ostream& operator<<(std::ostream& os, test_template<T>) {
-  return os << 1;
-}
-
-namespace fmt {
-template <typename T> struct formatter<test_template<T>> : formatter<int> {
-  auto format(test_template<T>, format_context& ctx) -> decltype(ctx.out()) {
-    return formatter<int>::format(2, ctx);
-  }
-};
-}  // namespace fmt
-
-TEST(ostream_test, template) {
-  EXPECT_EQ("2", fmt::format("{}", test_template<int>()));
-}
-
-TEST(ostream_test, format_to_n) {
-  char buffer[4];
-  buffer[3] = 'x';
-  auto result = fmt::format_to_n(buffer, 3, "{}", fmt_test::abc());
-  EXPECT_EQ(3u, result.size);
-  EXPECT_EQ(buffer + 3, result.out);
-  EXPECT_EQ("abcx", fmt::string_view(buffer, 4));
-  result = fmt::format_to_n(buffer, 3, "x{}y", fmt_test::abc());
-  EXPECT_EQ(5u, result.size);
-  EXPECT_EQ(buffer + 3, result.out);
-  EXPECT_EQ("xabx", fmt::string_view(buffer, 4));
-}
-
-template <typename T> struct convertible {
-  T value;
-  explicit convertible(const T& val) : value(val) {}
-  operator T() const { return value; }
-};
-
-TEST(ostream_test, disable_builtin_ostream_operators) {
-  EXPECT_EQ("42", fmt::format("{:d}", convertible<unsigned short>(42)));
-  EXPECT_EQ("foo", fmt::format("{}", convertible<const char*>("foo")));
-}
-
-struct explicitly_convertible_to_string_like {
-  template <typename String,
-            typename = typename std::enable_if<std::is_constructible<
-                String, const char*, size_t>::value>::type>
-  explicit operator String() const {
-    return String("foo", 3u);
-  }
-};
-
-std::ostream& operator<<(std::ostream& os,
-                         explicitly_convertible_to_string_like) {
-  return os << "bar";
-}
-
-TEST(ostream_test, format_explicitly_convertible_to_string_like) {
-  EXPECT_EQ("bar", fmt::format("{}", explicitly_convertible_to_string_like()));
-}
-
-#ifdef FMT_USE_STRING_VIEW
-struct explicitly_convertible_to_std_string_view {
-  explicit operator fmt::detail::std_string_view<char>() const {
-    return {"foo", 3u};
-  }
-};
-
-std::ostream& operator<<(std::ostream& os,
-                         explicitly_convertible_to_std_string_view) {
-  return os << "bar";
-}
-
-TEST(ostream_test, format_explicitly_convertible_to_std_string_view) {
-  EXPECT_EQ("bar", fmt::format("{}", explicitly_convertible_to_string_like()));
-}
-#endif  // FMT_USE_STRING_VIEW
-
-struct streamable_and_convertible_to_bool {
-  operator bool() const { return true; }
-};
-
-std::ostream& operator<<(std::ostream& os, streamable_and_convertible_to_bool) {
-  return os << "foo";
-}
-
-TEST(ostream_test, format_convertible_to_bool) {
-  // operator<< is intentionally not used because of potential ODR violations.
-  EXPECT_EQ(fmt::format("{}", streamable_and_convertible_to_bool()), "true");
-}
-
-struct copyfmt_test {};
-
-std::ostream& operator<<(std::ostream& os, copyfmt_test) {
-  std::ios ios(nullptr);
-  ios.copyfmt(os);
-  return os << "foo";
-}
-
-TEST(ostream_test, copyfmt) {
-  EXPECT_EQ("foo", fmt::format("{}", copyfmt_test()));
-}
-
-TEST(ostream_test, to_string) {
-  EXPECT_EQ("abc", fmt::to_string(fmt_test::abc()));
-}
-
-TEST(ostream_test, range) {
-  auto strs = std::vector<test_string>{test_string("foo"), test_string("bar")};
-  EXPECT_EQ("[foo, bar]", fmt::format("{}", strs));
-}
-
-struct abstract {
-  virtual ~abstract() = default;
-  virtual void f() = 0;
-  friend std::ostream& operator<<(std::ostream& os, const abstract&) {
-    return os;
-  }
-};
-
-void format_abstract_compiles(const abstract& a) {
-  fmt::format(FMT_COMPILE("{}"), a);
-}
-
-TEST(ostream_test, is_formattable) {
-  EXPECT_TRUE(fmt::is_formattable<std::string>());
-  EXPECT_TRUE(fmt::is_formattable<fmt::detail::std_string_view<char>>());
-}
diff --git a/3rdparty/fmt/test/posix-mock-test.cc b/3rdparty/fmt/test/posix-mock-test.cc
deleted file mode 100644
index 255e216c..00000000
--- a/3rdparty/fmt/test/posix-mock-test.cc
+++ /dev/null
@@ -1,540 +0,0 @@
-// Tests of the C++ interface to POSIX functions that require mocks
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-// Disable bogus MSVC warnings.
-#ifndef _CRT_SECURE_NO_WARNINGS
-#  define _CRT_SECURE_NO_WARNINGS
-#endif
-
-#include "posix-mock.h"
-
-#include <errno.h>
-#include <fcntl.h>
-
-#include <climits>
-#include <memory>
-
-#include "../src/os.cc"
-
-#ifdef _WIN32
-#  include <io.h>
-#  undef max
-#endif
-
-#include "gmock/gmock.h"
-#include "gtest-extra.h"
-#include "util.h"
-
-using fmt::buffered_file;
-
-using testing::_;
-using testing::Return;
-using testing::StrEq;
-
-template <typename Mock> struct scoped_mock : testing::StrictMock<Mock> {
-  scoped_mock() { Mock::instance = this; }
-  ~scoped_mock() { Mock::instance = nullptr; }
-};
-
-namespace {
-int open_count;
-int close_count;
-int dup_count;
-int dup2_count;
-int fdopen_count;
-int read_count;
-int write_count;
-int pipe_count;
-int fopen_count;
-int fclose_count;
-int fileno_count;
-size_t read_nbyte;
-size_t write_nbyte;
-bool sysconf_error;
-
-enum { none, max_size, error } fstat_sim;
-}  // namespace
-
-#define EMULATE_EINTR(func, error_result) \
-  if (func##_count != 0) {                \
-    if (func##_count++ != 3) {            \
-      errno = EINTR;                      \
-      return error_result;                \
-    }                                     \
-  }
-
-#ifndef _MSC_VER
-int test::open(const char* path, int oflag, int mode) {
-  EMULATE_EINTR(open, -1);
-  return ::open(path, oflag, mode);
-}
-#else
-errno_t test::sopen_s(int* pfh, const char* filename, int oflag, int shflag,
-                      int pmode) {
-  EMULATE_EINTR(open, EINTR);
-  return _sopen_s(pfh, filename, oflag, shflag, pmode);
-}
-#endif
-
-#ifndef _WIN32
-
-long test::sysconf(int name) {
-  long result = ::sysconf(name);
-  if (!sysconf_error) return result;
-  // Simulate an error.
-  errno = EINVAL;
-  return -1;
-}
-
-static off_t max_file_size() { return std::numeric_limits<off_t>::max(); }
-
-int test::fstat(int fd, struct stat* buf) {
-  int result = ::fstat(fd, buf);
-  if (fstat_sim == max_size) buf->st_size = max_file_size();
-  return result;
-}
-
-#else
-
-static LONGLONG max_file_size() { return std::numeric_limits<LONGLONG>::max(); }
-
-DWORD test::GetFileSize(HANDLE hFile, LPDWORD lpFileSizeHigh) {
-  if (fstat_sim == error) {
-    SetLastError(ERROR_ACCESS_DENIED);
-    return INVALID_FILE_SIZE;
-  }
-  if (fstat_sim == max_size) {
-    DWORD max = std::numeric_limits<DWORD>::max();
-    *lpFileSizeHigh = max >> 1;
-    return max;
-  }
-  return ::GetFileSize(hFile, lpFileSizeHigh);
-}
-
-#endif
-
-int test::close(int fildes) {
-  // Close the file first because close shouldn't be retried.
-  int result = ::FMT_POSIX(close(fildes));
-  EMULATE_EINTR(close, -1);
-  return result;
-}
-
-int test::dup(int fildes) {
-  EMULATE_EINTR(dup, -1);
-  return ::FMT_POSIX(dup(fildes));
-}
-
-int test::dup2(int fildes, int fildes2) {
-  EMULATE_EINTR(dup2, -1);
-  return ::FMT_POSIX(dup2(fildes, fildes2));
-}
-
-FILE* test::fdopen(int fildes, const char* mode) {
-  EMULATE_EINTR(fdopen, nullptr);
-  return ::FMT_POSIX(fdopen(fildes, mode));
-}
-
-test::ssize_t test::read(int fildes, void* buf, test::size_t nbyte) {
-  read_nbyte = nbyte;
-  EMULATE_EINTR(read, -1);
-  return ::FMT_POSIX(read(fildes, buf, nbyte));
-}
-
-test::ssize_t test::write(int fildes, const void* buf, test::size_t nbyte) {
-  write_nbyte = nbyte;
-  EMULATE_EINTR(write, -1);
-  return ::FMT_POSIX(write(fildes, buf, nbyte));
-}
-
-#ifndef _WIN32
-int test::pipe(int fildes[2]) {
-  EMULATE_EINTR(pipe, -1);
-  return ::pipe(fildes);
-}
-#else
-int test::pipe(int* pfds, unsigned psize, int textmode) {
-  EMULATE_EINTR(pipe, -1);
-  return _pipe(pfds, psize, textmode);
-}
-#endif
-
-FILE* test::fopen(const char* filename, const char* mode) {
-  EMULATE_EINTR(fopen, nullptr);
-  return ::fopen(filename, mode);
-}
-
-int test::fclose(FILE* stream) {
-  EMULATE_EINTR(fclose, EOF);
-  return ::fclose(stream);
-}
-
-int(test::fileno)(FILE* stream) {
-  EMULATE_EINTR(fileno, -1);
-#ifdef fileno
-  return FMT_POSIX(fileno(stream));
-#else
-  return ::FMT_POSIX(fileno(stream));
-#endif
-}
-
-#ifndef _WIN32
-#  define EXPECT_RETRY(statement, func, message) \
-    func##_count = 1;                            \
-    statement;                                   \
-    EXPECT_EQ(4, func##_count);                  \
-    func##_count = 0;
-#  define EXPECT_EQ_POSIX(expected, actual) EXPECT_EQ(expected, actual)
-#else
-#  define EXPECT_RETRY(statement, func, message)    \
-    func##_count = 1;                               \
-    EXPECT_SYSTEM_ERROR(statement, EINTR, message); \
-    func##_count = 0;
-#  define EXPECT_EQ_POSIX(expected, actual)
-#endif
-
-#if FMT_USE_FCNTL
-void write_file(fmt::cstring_view filename, fmt::string_view content) {
-  fmt::buffered_file f(filename, "w");
-  f.print("{}", content);
-}
-
-using fmt::file;
-
-TEST(os_test, getpagesize) {
-#  ifdef _WIN32
-  SYSTEM_INFO si = {};
-  GetSystemInfo(&si);
-  EXPECT_EQ(si.dwPageSize, fmt::getpagesize());
-#  else
-  EXPECT_EQ(sysconf(_SC_PAGESIZE), fmt::getpagesize());
-  sysconf_error = true;
-  EXPECT_SYSTEM_ERROR(fmt::getpagesize(), EINVAL,
-                      "cannot get memory page size");
-  sysconf_error = false;
-#  endif
-}
-
-TEST(file_test, open_retry) {
-  write_file("temp", "there must be something here");
-  std::unique_ptr<file> f{nullptr};
-  EXPECT_RETRY(f.reset(new file("temp", file::RDONLY)), open,
-               "cannot open file temp");
-#  ifndef _WIN32
-  char c = 0;
-  f->read(&c, 1);
-#  endif
-}
-
-TEST(file_test, close_no_retry_in_dtor) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  std::unique_ptr<file> f(new file(std::move(read_end)));
-  int saved_close_count = 0;
-  EXPECT_WRITE(
-      stderr,
-      {
-        close_count = 1;
-        f.reset(nullptr);
-        saved_close_count = close_count;
-        close_count = 0;
-      },
-      system_error_message(EINTR, "cannot close file") + "\n");
-  EXPECT_EQ(2, saved_close_count);
-}
-
-TEST(file_test, close_no_retry) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  close_count = 1;
-  EXPECT_SYSTEM_ERROR(read_end.close(), EINTR, "cannot close file");
-  EXPECT_EQ(2, close_count);
-  close_count = 0;
-}
-
-TEST(file_test, size) {
-  std::string content = "top secret, destroy before reading";
-  write_file("temp", content);
-  file f("temp", file::RDONLY);
-  EXPECT_GE(f.size(), 0);
-  EXPECT_EQ(content.size(), static_cast<unsigned long long>(f.size()));
-#  ifdef _WIN32
-  auto error_code = std::error_code();
-  fstat_sim = error;
-  try {
-    f.size();
-  } catch (const std::system_error& e) {
-    error_code = e.code();
-  }
-  fstat_sim = none;
-  EXPECT_EQ(error_code,
-            std::error_code(ERROR_ACCESS_DENIED, fmt::system_category()));
-#  else
-  f.close();
-  EXPECT_SYSTEM_ERROR(f.size(), EBADF, "cannot get file attributes");
-#  endif
-}
-
-TEST(file_test, max_size) {
-  write_file("temp", "");
-  file f("temp", file::RDONLY);
-  fstat_sim = max_size;
-  EXPECT_GE(f.size(), 0);
-  EXPECT_EQ(max_file_size(), f.size());
-  fstat_sim = none;
-}
-
-TEST(file_test, read_retry) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  enum { SIZE = 4 };
-  write_end.write("test", SIZE);
-  write_end.close();
-  char buffer[SIZE];
-  size_t count = 0;
-  EXPECT_RETRY(count = read_end.read(buffer, SIZE), read,
-               "cannot read from file");
-  EXPECT_EQ_POSIX(static_cast<std::streamsize>(SIZE), count);
-}
-
-TEST(file_test, write_retry) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  enum { SIZE = 4 };
-  size_t count = 0;
-  EXPECT_RETRY(count = write_end.write("test", SIZE), write,
-               "cannot write to file");
-  write_end.close();
-#  ifndef _WIN32
-  EXPECT_EQ(static_cast<std::streamsize>(SIZE), count);
-  char buffer[SIZE + 1];
-  read_end.read(buffer, SIZE);
-  buffer[SIZE] = '\0';
-  EXPECT_STREQ("test", buffer);
-#  endif
-}
-
-#  ifdef _WIN32
-TEST(file_test, convert_read_count) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  char c;
-  size_t size = UINT_MAX;
-  if (sizeof(unsigned) != sizeof(size_t)) ++size;
-  read_count = 1;
-  read_nbyte = 0;
-  EXPECT_THROW(read_end.read(&c, size), std::system_error);
-  read_count = 0;
-  EXPECT_EQ(UINT_MAX, read_nbyte);
-}
-
-TEST(file_test, convert_write_count) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  char c;
-  size_t size = UINT_MAX;
-  if (sizeof(unsigned) != sizeof(size_t)) ++size;
-  write_count = 1;
-  write_nbyte = 0;
-  EXPECT_THROW(write_end.write(&c, size), std::system_error);
-  write_count = 0;
-  EXPECT_EQ(UINT_MAX, write_nbyte);
-}
-#  endif
-
-TEST(file_test, dup_no_retry) {
-  int stdout_fd = FMT_POSIX(fileno(stdout));
-  dup_count = 1;
-  EXPECT_SYSTEM_ERROR(
-      file::dup(stdout_fd), EINTR,
-      fmt::format("cannot duplicate file descriptor {}", stdout_fd));
-  dup_count = 0;
-}
-
-TEST(file_test, dup2_retry) {
-  int stdout_fd = FMT_POSIX(fileno(stdout));
-  file f1 = file::dup(stdout_fd), f2 = file::dup(stdout_fd);
-  EXPECT_RETRY(f1.dup2(f2.descriptor()), dup2,
-               fmt::format("cannot duplicate file descriptor {} to {}",
-                           f1.descriptor(), f2.descriptor()));
-}
-
-TEST(file_test, dup2_no_except_retry) {
-  int stdout_fd = FMT_POSIX(fileno(stdout));
-  file f1 = file::dup(stdout_fd), f2 = file::dup(stdout_fd);
-  std::error_code ec;
-  dup2_count = 1;
-  f1.dup2(f2.descriptor(), ec);
-#  ifndef _WIN32
-  EXPECT_EQ(4, dup2_count);
-#  else
-  EXPECT_EQ(EINTR, ec.value());
-#  endif
-  dup2_count = 0;
-}
-
-TEST(file_test, pipe_no_retry) {
-  file read_end, write_end;
-  pipe_count = 1;
-  EXPECT_SYSTEM_ERROR(file::pipe(read_end, write_end), EINTR,
-                      "cannot create pipe");
-  pipe_count = 0;
-}
-
-TEST(file_test, fdopen_no_retry) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  fdopen_count = 1;
-  EXPECT_SYSTEM_ERROR(read_end.fdopen("r"), EINTR,
-                      "cannot associate stream with file descriptor");
-  fdopen_count = 0;
-}
-
-TEST(buffered_file_test, open_retry) {
-  write_file("temp", "there must be something here");
-  std::unique_ptr<buffered_file> f{nullptr};
-  EXPECT_RETRY(f.reset(new buffered_file("temp", "r")), fopen,
-               "cannot open file temp");
-#  ifndef _WIN32
-  char c = 0;
-  if (fread(&c, 1, 1, f->get()) < 1)
-    throw fmt::system_error(errno, "fread failed");
-#  endif
-}
-
-TEST(buffered_file_test, close_no_retry_in_dtor) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  std::unique_ptr<buffered_file> f(new buffered_file(read_end.fdopen("r")));
-  int saved_fclose_count = 0;
-  EXPECT_WRITE(
-      stderr,
-      {
-        fclose_count = 1;
-        f.reset(nullptr);
-        saved_fclose_count = fclose_count;
-        fclose_count = 0;
-      },
-      system_error_message(EINTR, "cannot close file") + "\n");
-  EXPECT_EQ(2, saved_fclose_count);
-}
-
-TEST(buffered_file_test, close_no_retry) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  buffered_file f = read_end.fdopen("r");
-  fclose_count = 1;
-  EXPECT_SYSTEM_ERROR(f.close(), EINTR, "cannot close file");
-  EXPECT_EQ(2, fclose_count);
-  fclose_count = 0;
-}
-
-TEST(buffered_file_test, fileno_no_retry) {
-  file read_end, write_end;
-  file::pipe(read_end, write_end);
-  buffered_file f = read_end.fdopen("r");
-  fileno_count = 1;
-  EXPECT_SYSTEM_ERROR((f.fileno)(), EINTR, "cannot get file descriptor");
-  EXPECT_EQ(2, fileno_count);
-  fileno_count = 0;
-}
-#endif  // FMT_USE_FCNTL
-
-struct test_mock {
-  static test_mock* instance;
-} * test_mock::instance;
-
-TEST(scoped_mock, scope) {
-  {
-    scoped_mock<test_mock> mock;
-    EXPECT_EQ(&mock, test_mock::instance);
-    test_mock& copy = mock;
-    static_cast<void>(copy);
-  }
-  EXPECT_EQ(nullptr, test_mock::instance);
-}
-
-#ifdef FMT_LOCALE
-
-using locale_type = fmt::locale::type;
-
-struct locale_mock {
-  static locale_mock* instance;
-  MOCK_METHOD3(newlocale, locale_type(int category_mask, const char* locale,
-                                      locale_type base));
-  MOCK_METHOD1(freelocale, void(locale_type locale));
-} * locale_mock::instance;
-
-#  ifdef _MSC_VER
-#    pragma warning(push)
-#    pragma warning(disable : 4273)
-#    ifdef __clang__
-#      pragma clang diagnostic push
-#      pragma clang diagnostic ignored "-Winconsistent-dllimport"
-#    endif
-
-_locale_t _create_locale(int category, const char* locale) {
-  return locale_mock::instance->newlocale(category, locale, 0);
-}
-
-void _free_locale(_locale_t locale) {
-  locale_mock::instance->freelocale(locale);
-}
-#    ifdef __clang__
-#      pragma clang diagnostic pop
-#    endif
-#    pragma warning(pop)
-#  endif
-
-#  if defined(__THROW) && \
-      ((FMT_GCC_VERSION > 0 && FMT_GCC_VERSION <= 408) || defined(__e2k__))
-#    define FMT_LOCALE_THROW __THROW
-#  else
-#    define FMT_LOCALE_THROW
-#  endif
-
-#  if defined(__APPLE__) || \
-      (defined(__FreeBSD__) && __FreeBSD_version < 1200002)
-typedef int FreeLocaleResult;
-#  else
-typedef void FreeLocaleResult;
-#  endif
-
-FreeLocaleResult freelocale(locale_type locale) FMT_LOCALE_THROW {
-  locale_mock::instance->freelocale(locale);
-  return FreeLocaleResult();
-}
-
-#  undef FMT_LOCALE_THROW
-
-#  ifndef _WIN32
-locale_t test::newlocale(int category_mask, const char* locale, locale_t base) {
-  return locale_mock::instance->newlocale(category_mask, locale, base);
-}
-
-TEST(locale_test, locale_mock) {
-  scoped_mock<locale_mock> mock;
-  auto locale = reinterpret_cast<locale_type>(11);
-  EXPECT_CALL(mock, newlocale(222, StrEq("foo"), locale));
-  FMT_SYSTEM(newlocale(222, "foo", locale));
-}
-#  endif
-
-TEST(locale_test, locale) {
-#  ifndef LC_NUMERIC_MASK
-  enum { LC_NUMERIC_MASK = LC_NUMERIC };
-#  endif
-  scoped_mock<locale_mock> mock;
-  auto impl = reinterpret_cast<locale_type>(42);
-  EXPECT_CALL(mock, newlocale(LC_NUMERIC_MASK, StrEq("C"), nullptr))
-      .WillOnce(Return(impl));
-  EXPECT_CALL(mock, freelocale(impl));
-  fmt::locale loc;
-  EXPECT_EQ(impl, loc.get());
-}
-
-#endif  // FMT_LOCALE
diff --git a/3rdparty/fmt/test/posix-mock.h b/3rdparty/fmt/test/posix-mock.h
deleted file mode 100644
index e76af700..00000000
--- a/3rdparty/fmt/test/posix-mock.h
+++ /dev/null
@@ -1,77 +0,0 @@
-// Formatting library for C++ - mocks of POSIX functions
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_POSIX_TEST_H
-#define FMT_POSIX_TEST_H
-
-#include <errno.h>
-#include <locale.h>
-#include <stdio.h>
-#ifdef __APPLE__
-#  include <xlocale.h>
-#endif
-
-#ifdef _WIN32
-#  include <windows.h>
-#else
-#  include <sys/param.h>  // for FreeBSD version
-#  include <sys/types.h>  // for ssize_t
-#endif
-
-#ifndef _MSC_VER
-struct stat;
-#endif
-
-namespace test {
-
-#ifndef _MSC_VER
-// Size type for read and write.
-typedef size_t size_t;
-typedef ssize_t ssize_t;
-int open(const char* path, int oflag, int mode);
-int fstat(int fd, struct stat* buf);
-#else
-typedef unsigned size_t;
-typedef int ssize_t;
-errno_t sopen_s(int* pfh, const char* filename, int oflag, int shflag,
-                int pmode);
-#endif
-
-#ifndef _WIN32
-long sysconf(int name);
-#else
-DWORD GetFileSize(HANDLE hFile, LPDWORD lpFileSizeHigh);
-#endif
-
-int close(int fildes);
-
-int dup(int fildes);
-int dup2(int fildes, int fildes2);
-
-FILE* fdopen(int fildes, const char* mode);
-
-ssize_t read(int fildes, void* buf, size_t nbyte);
-ssize_t write(int fildes, const void* buf, size_t nbyte);
-
-#ifndef _WIN32
-int pipe(int fildes[2]);
-#else
-int pipe(int* pfds, unsigned psize, int textmode);
-#endif
-
-FILE* fopen(const char* filename, const char* mode);
-int fclose(FILE* stream);
-int(fileno)(FILE* stream);
-
-#if defined(FMT_LOCALE) && !defined(_WIN32)
-locale_t newlocale(int category_mask, const char* locale, locale_t base);
-#endif
-}  // namespace test
-
-#define FMT_SYSTEM(call) test::call
-
-#endif  // FMT_POSIX_TEST_H
diff --git a/3rdparty/fmt/test/printf-test.cc b/3rdparty/fmt/test/printf-test.cc
deleted file mode 100644
index 0bb9ccda..00000000
--- a/3rdparty/fmt/test/printf-test.cc
+++ /dev/null
@@ -1,588 +0,0 @@
-// Formatting library for C++ - printf tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "fmt/printf.h"
-
-#include <cctype>
-#include <climits>
-#include <cstring>
-
-#include "fmt/ostream.h"
-#include "fmt/xchar.h"
-#include "gtest-extra.h"
-#include "util.h"
-
-using fmt::format;
-using fmt::format_error;
-using fmt::detail::max_value;
-
-const unsigned big_num = INT_MAX + 1u;
-
-// Makes format string argument positional.
-static std::string make_positional(fmt::string_view format) {
-  std::string s(format.data(), format.size());
-  s.replace(s.find('%'), 1, "%1$");
-  return s;
-}
-
-static std::wstring make_positional(fmt::basic_string_view<wchar_t> format) {
-  std::wstring s(format.data(), format.size());
-  s.replace(s.find(L'%'), 1, L"%1$");
-  return s;
-}
-
-// A wrapper around fmt::sprintf to workaround bogus warnings about invalid
-// format strings in MSVC.
-template <typename... Args>
-std::string test_sprintf(fmt::string_view format, const Args&... args) {
-  return fmt::sprintf(format, args...);
-}
-template <typename... Args>
-std::wstring test_sprintf(fmt::basic_string_view<wchar_t> format,
-                          const Args&... args) {
-  return fmt::sprintf(format, args...);
-}
-
-#define EXPECT_PRINTF(expected_output, format, arg)     \
-  EXPECT_EQ(expected_output, test_sprintf(format, arg)) \
-      << "format: " << format;                          \
-  EXPECT_EQ(expected_output, fmt::sprintf(make_positional(format), arg))
-
-TEST(printf_test, no_args) {
-  EXPECT_EQ("test", test_sprintf("test"));
-  EXPECT_EQ(L"test", fmt::sprintf(L"test"));
-}
-
-TEST(printf_test, escape) {
-  EXPECT_EQ("%", test_sprintf("%%"));
-  EXPECT_EQ("before %", test_sprintf("before %%"));
-  EXPECT_EQ("% after", test_sprintf("%% after"));
-  EXPECT_EQ("before % after", test_sprintf("before %% after"));
-  EXPECT_EQ("%s", test_sprintf("%%s"));
-  EXPECT_EQ(L"%", fmt::sprintf(L"%%"));
-  EXPECT_EQ(L"before %", fmt::sprintf(L"before %%"));
-  EXPECT_EQ(L"% after", fmt::sprintf(L"%% after"));
-  EXPECT_EQ(L"before % after", fmt::sprintf(L"before %% after"));
-  EXPECT_EQ(L"%s", fmt::sprintf(L"%%s"));
-}
-
-TEST(printf_test, positional_args) {
-  EXPECT_EQ("42", test_sprintf("%1$d", 42));
-  EXPECT_EQ("before 42", test_sprintf("before %1$d", 42));
-  EXPECT_EQ("42 after", test_sprintf("%1$d after", 42));
-  EXPECT_EQ("before 42 after", test_sprintf("before %1$d after", 42));
-  EXPECT_EQ("answer = 42", test_sprintf("%1$s = %2$d", "answer", 42));
-  EXPECT_EQ("42 is the answer", test_sprintf("%2$d is the %1$s", "answer", 42));
-  EXPECT_EQ("abracadabra", test_sprintf("%1$s%2$s%1$s", "abra", "cad"));
-}
-
-TEST(printf_test, automatic_arg_indexing) {
-  EXPECT_EQ("abc", test_sprintf("%c%c%c", 'a', 'b', 'c'));
-}
-
-TEST(printf_test, number_is_too_big_in_arg_index) {
-  EXPECT_THROW_MSG(test_sprintf(format("%{}$", big_num)), format_error,
-                   "argument not found");
-  EXPECT_THROW_MSG(test_sprintf(format("%{}$d", big_num)), format_error,
-                   "argument not found");
-}
-
-TEST(printf_test, switch_arg_indexing) {
-  EXPECT_THROW_MSG(test_sprintf("%1$d%", 1, 2), format_error,
-                   "cannot switch from manual to automatic argument indexing");
-  EXPECT_THROW_MSG(test_sprintf(format("%1$d%{}d", big_num), 1, 2),
-                   format_error, "number is too big");
-  EXPECT_THROW_MSG(test_sprintf("%1$d%d", 1, 2), format_error,
-                   "cannot switch from manual to automatic argument indexing");
-
-  EXPECT_THROW_MSG(test_sprintf("%d%1$", 1, 2), format_error,
-                   "cannot switch from automatic to manual argument indexing");
-  EXPECT_THROW_MSG(test_sprintf(format("%d%{}$d", big_num), 1, 2), format_error,
-                   "cannot switch from automatic to manual argument indexing");
-  EXPECT_THROW_MSG(test_sprintf("%d%1$d", 1, 2), format_error,
-                   "cannot switch from automatic to manual argument indexing");
-
-  // Indexing errors override width errors.
-  EXPECT_THROW_MSG(test_sprintf(format("%d%1${}d", big_num), 1, 2),
-                   format_error, "number is too big");
-  EXPECT_THROW_MSG(test_sprintf(format("%1$d%{}d", big_num), 1, 2),
-                   format_error, "number is too big");
-}
-
-TEST(printf_test, invalid_arg_index) {
-  EXPECT_THROW_MSG(test_sprintf("%0$d", 42), format_error,
-                   "argument not found");
-  EXPECT_THROW_MSG(test_sprintf("%2$d", 42), format_error,
-                   "argument not found");
-  EXPECT_THROW_MSG(test_sprintf(format("%{}$d", INT_MAX), 42), format_error,
-                   "argument not found");
-
-  EXPECT_THROW_MSG(test_sprintf("%2$", 42), format_error, "argument not found");
-  EXPECT_THROW_MSG(test_sprintf(format("%{}$d", big_num), 42), format_error,
-                   "argument not found");
-}
-
-TEST(printf_test, default_align_right) {
-  EXPECT_PRINTF("   42", "%5d", 42);
-  EXPECT_PRINTF("  abc", "%5s", "abc");
-}
-
-TEST(printf_test, zero_flag) {
-  EXPECT_PRINTF("00042", "%05d", 42);
-  EXPECT_PRINTF("-0042", "%05d", -42);
-
-  EXPECT_PRINTF("00042", "%05d", 42);
-  EXPECT_PRINTF("-0042", "%05d", -42);
-  EXPECT_PRINTF("-004.2", "%06g", -4.2);
-
-  EXPECT_PRINTF("+00042", "%00+6d", 42);
-
-  EXPECT_PRINTF("   42", "%05.d", 42);
-  EXPECT_PRINTF(" 0042", "%05.4d", 42);
-
-  // '0' flag is ignored for non-numeric types.
-  EXPECT_PRINTF("    x", "%05c", 'x');
-}
-
-TEST(printf_test, plus_flag) {
-  EXPECT_PRINTF("+42", "%+d", 42);
-  EXPECT_PRINTF("-42", "%+d", -42);
-  EXPECT_PRINTF("+0042", "%+05d", 42);
-  EXPECT_PRINTF("+0042", "%0++5d", 42);
-
-  // '+' flag is ignored for non-numeric types.
-  EXPECT_PRINTF("x", "%+c", 'x');
-
-  // '+' flag wins over space flag
-  EXPECT_PRINTF("+42", "%+ d", 42);
-  EXPECT_PRINTF("-42", "%+ d", -42);
-  EXPECT_PRINTF("+42", "% +d", 42);
-  EXPECT_PRINTF("-42", "% +d", -42);
-  EXPECT_PRINTF("+0042", "% +05d", 42);
-  EXPECT_PRINTF("+0042", "%0+ 5d", 42);
-
-  // '+' flag and space flag are both ignored for non-numeric types.
-  EXPECT_PRINTF("x", "%+ c", 'x');
-  EXPECT_PRINTF("x", "% +c", 'x');
-}
-
-TEST(printf_test, minus_flag) {
-  EXPECT_PRINTF("abc  ", "%-5s", "abc");
-  EXPECT_PRINTF("abc  ", "%0--5s", "abc");
-
-  EXPECT_PRINTF("7    ", "%-5d", 7);
-  EXPECT_PRINTF("97   ", "%-5hhi", 'a');
-  EXPECT_PRINTF("a    ", "%-5c", 'a');
-
-  // '0' flag is ignored if '-' flag is given
-  EXPECT_PRINTF("7    ", "%-05d", 7);
-  EXPECT_PRINTF("7    ", "%0-5d", 7);
-  EXPECT_PRINTF("a    ", "%-05c", 'a');
-  EXPECT_PRINTF("a    ", "%0-5c", 'a');
-  EXPECT_PRINTF("97   ", "%-05hhi", 'a');
-  EXPECT_PRINTF("97   ", "%0-5hhi", 'a');
-
-  // '-' and space flag don't interfere
-  EXPECT_PRINTF(" 42", "%- d", 42);
-}
-
-TEST(printf_test, space_flag) {
-  EXPECT_PRINTF(" 42", "% d", 42);
-  EXPECT_PRINTF("-42", "% d", -42);
-  EXPECT_PRINTF(" 0042", "% 05d", 42);
-  EXPECT_PRINTF(" 0042", "%0  5d", 42);
-
-  // ' ' flag is ignored for non-numeric types.
-  EXPECT_PRINTF("x", "% c", 'x');
-}
-
-TEST(printf_test, hash_flag) {
-  EXPECT_PRINTF("042", "%#o", 042);
-  EXPECT_PRINTF(fmt::format("0{:o}", static_cast<unsigned>(-042)), "%#o", -042);
-  EXPECT_PRINTF("0", "%#o", 0);
-
-  EXPECT_PRINTF("0x42", "%#x", 0x42);
-  EXPECT_PRINTF("0X42", "%#X", 0x42);
-  EXPECT_PRINTF(fmt::format("0x{:x}", static_cast<unsigned>(-0x42)), "%#x",
-                -0x42);
-  EXPECT_PRINTF("0", "%#x", 0);
-
-  EXPECT_PRINTF("0x0042", "%#06x", 0x42);
-  EXPECT_PRINTF("0x0042", "%0##6x", 0x42);
-
-  EXPECT_PRINTF("-42.000000", "%#f", -42.0);
-  EXPECT_PRINTF("-42.000000", "%#F", -42.0);
-
-  char buffer[256];
-  safe_sprintf(buffer, "%#e", -42.0);
-  EXPECT_PRINTF(buffer, "%#e", -42.0);
-  safe_sprintf(buffer, "%#E", -42.0);
-  EXPECT_PRINTF(buffer, "%#E", -42.0);
-
-  EXPECT_PRINTF("-42.0000", "%#g", -42.0);
-  EXPECT_PRINTF("-42.0000", "%#G", -42.0);
-
-  safe_sprintf(buffer, "%#a", 16.0);
-  EXPECT_PRINTF(buffer, "%#a", 16.0);
-  safe_sprintf(buffer, "%#A", 16.0);
-  EXPECT_PRINTF(buffer, "%#A", 16.0);
-
-  // '#' flag is ignored for non-numeric types.
-  EXPECT_PRINTF("x", "%#c", 'x');
-}
-
-TEST(printf_test, width) {
-  EXPECT_PRINTF("  abc", "%5s", "abc");
-
-  // Width cannot be specified twice.
-  EXPECT_THROW_MSG(test_sprintf("%5-5d", 42), format_error,
-                   "invalid type specifier");
-
-  EXPECT_THROW_MSG(test_sprintf(format("%{}d", big_num), 42), format_error,
-                   "number is too big");
-  EXPECT_THROW_MSG(test_sprintf(format("%1${}d", big_num), 42), format_error,
-                   "number is too big");
-}
-
-TEST(printf_test, dynamic_width) {
-  EXPECT_EQ("   42", test_sprintf("%*d", 5, 42));
-  EXPECT_EQ("42   ", test_sprintf("%*d", -5, 42));
-  EXPECT_THROW_MSG(test_sprintf("%*d", 5.0, 42), format_error,
-                   "width is not integer");
-  EXPECT_THROW_MSG(test_sprintf("%*d"), format_error, "argument not found");
-  EXPECT_THROW_MSG(test_sprintf("%*d", big_num, 42), format_error,
-                   "number is too big");
-}
-
-TEST(printf_test, int_precision) {
-  EXPECT_PRINTF("00042", "%.5d", 42);
-  EXPECT_PRINTF("-00042", "%.5d", -42);
-  EXPECT_PRINTF("00042", "%.5x", 0x42);
-  EXPECT_PRINTF("0x00042", "%#.5x", 0x42);
-  EXPECT_PRINTF("00042", "%.5o", 042);
-  EXPECT_PRINTF("00042", "%#.5o", 042);
-
-  EXPECT_PRINTF("  00042", "%7.5d", 42);
-  EXPECT_PRINTF("  00042", "%7.5x", 0x42);
-  EXPECT_PRINTF("   0x00042", "%#10.5x", 0x42);
-  EXPECT_PRINTF("  00042", "%7.5o", 042);
-  EXPECT_PRINTF("     00042", "%#10.5o", 042);
-
-  EXPECT_PRINTF("00042  ", "%-7.5d", 42);
-  EXPECT_PRINTF("00042  ", "%-7.5x", 0x42);
-  EXPECT_PRINTF("0x00042   ", "%-#10.5x", 0x42);
-  EXPECT_PRINTF("00042  ", "%-7.5o", 042);
-  EXPECT_PRINTF("00042     ", "%-#10.5o", 042);
-}
-
-TEST(printf_test, float_precision) {
-  char buffer[256];
-  safe_sprintf(buffer, "%.3e", 1234.5678);
-  EXPECT_PRINTF(buffer, "%.3e", 1234.5678);
-  EXPECT_PRINTF("1234.568", "%.3f", 1234.5678);
-  EXPECT_PRINTF("1.23e+03", "%.3g", 1234.5678);
-  safe_sprintf(buffer, "%.3a", 1234.5678);
-  EXPECT_PRINTF(buffer, "%.3a", 1234.5678);
-}
-
-TEST(printf_test, string_precision) {
-  char test[] = {'H', 'e', 'l', 'l', 'o'};
-  EXPECT_EQ(fmt::sprintf("%.4s", test), "Hell");
-}
-
-TEST(printf_test, ignore_precision_for_non_numeric_arg) {
-  EXPECT_PRINTF("abc", "%.5s", "abc");
-}
-
-TEST(printf_test, dynamic_precision) {
-  EXPECT_EQ("00042", test_sprintf("%.*d", 5, 42));
-  EXPECT_EQ("42", test_sprintf("%.*d", -5, 42));
-  EXPECT_THROW_MSG(test_sprintf("%.*d", 5.0, 42), format_error,
-                   "precision is not integer");
-  EXPECT_THROW_MSG(test_sprintf("%.*d"), format_error, "argument not found");
-  EXPECT_THROW_MSG(test_sprintf("%.*d", big_num, 42), format_error,
-                   "number is too big");
-  if (sizeof(long long) != sizeof(int)) {
-    long long prec = static_cast<long long>(INT_MIN) - 1;
-    EXPECT_THROW_MSG(test_sprintf("%.*d", prec, 42), format_error,
-                     "number is too big");
-  }
-}
-
-template <typename T> struct make_signed { typedef T type; };
-
-#define SPECIALIZE_MAKE_SIGNED(T, S) \
-  template <> struct make_signed<T> { typedef S type; }
-
-SPECIALIZE_MAKE_SIGNED(char, signed char);
-SPECIALIZE_MAKE_SIGNED(unsigned char, signed char);
-SPECIALIZE_MAKE_SIGNED(unsigned short, short);
-SPECIALIZE_MAKE_SIGNED(unsigned, int);
-SPECIALIZE_MAKE_SIGNED(unsigned long, long);
-SPECIALIZE_MAKE_SIGNED(unsigned long long, long long);
-
-// Test length format specifier ``length_spec``.
-template <typename T, typename U>
-void test_length(const char* length_spec, U value) {
-  long long signed_value = 0;
-  unsigned long long unsigned_value = 0;
-  // Apply integer promotion to the argument.
-  unsigned long long max = max_value<U>();
-  using fmt::detail::const_check;
-  if (const_check(max <= static_cast<unsigned>(max_value<int>()))) {
-    signed_value = static_cast<int>(value);
-    unsigned_value = static_cast<unsigned long long>(value);
-  } else if (const_check(max <= max_value<unsigned>())) {
-    signed_value = static_cast<unsigned>(value);
-    unsigned_value = static_cast<unsigned long long>(value);
-  }
-  if (sizeof(U) <= sizeof(int) && sizeof(int) < sizeof(T)) {
-    signed_value = static_cast<long long>(value);
-    unsigned_value = static_cast<unsigned long long>(
-        static_cast<typename std::make_unsigned<unsigned>::type>(value));
-  } else {
-    signed_value = static_cast<typename make_signed<T>::type>(value);
-    unsigned_value = static_cast<typename std::make_unsigned<T>::type>(value);
-  }
-  std::ostringstream os;
-  os << signed_value;
-  EXPECT_PRINTF(os.str(), fmt::format("%{}d", length_spec), value);
-  EXPECT_PRINTF(os.str(), fmt::format("%{}i", length_spec), value);
-  os.str("");
-  os << unsigned_value;
-  EXPECT_PRINTF(os.str(), fmt::format("%{}u", length_spec), value);
-  os.str("");
-  os << std::oct << unsigned_value;
-  EXPECT_PRINTF(os.str(), fmt::format("%{}o", length_spec), value);
-  os.str("");
-  os << std::hex << unsigned_value;
-  EXPECT_PRINTF(os.str(), fmt::format("%{}x", length_spec), value);
-  os.str("");
-  os << std::hex << std::uppercase << unsigned_value;
-  EXPECT_PRINTF(os.str(), fmt::format("%{}X", length_spec), value);
-}
-
-template <typename T> void test_length(const char* length_spec) {
-  T min = std::numeric_limits<T>::min(), max = max_value<T>();
-  test_length<T>(length_spec, 42);
-  test_length<T>(length_spec, -42);
-  test_length<T>(length_spec, min);
-  test_length<T>(length_spec, max);
-  long long long_long_min = std::numeric_limits<long long>::min();
-  if (static_cast<long long>(min) > long_long_min)
-    test_length<T>(length_spec, static_cast<long long>(min) - 1);
-  unsigned long long long_long_max = max_value<long long>();
-  if (static_cast<unsigned long long>(max) < long_long_max)
-    test_length<T>(length_spec, static_cast<long long>(max) + 1);
-  test_length<T>(length_spec, std::numeric_limits<short>::min());
-  test_length<T>(length_spec, max_value<unsigned short>());
-  test_length<T>(length_spec, std::numeric_limits<int>::min());
-  test_length<T>(length_spec, max_value<int>());
-  test_length<T>(length_spec, std::numeric_limits<unsigned>::min());
-  test_length<T>(length_spec, max_value<unsigned>());
-  test_length<T>(length_spec, std::numeric_limits<long long>::min());
-  test_length<T>(length_spec, max_value<long long>());
-  test_length<T>(length_spec, std::numeric_limits<unsigned long long>::min());
-  test_length<T>(length_spec, max_value<unsigned long long>());
-}
-
-TEST(printf_test, length) {
-  test_length<char>("hh");
-  test_length<signed char>("hh");
-  test_length<unsigned char>("hh");
-  test_length<short>("h");
-  test_length<unsigned short>("h");
-  test_length<long>("l");
-  test_length<unsigned long>("l");
-  test_length<long long>("ll");
-  test_length<unsigned long long>("ll");
-  test_length<intmax_t>("j");
-  test_length<size_t>("z");
-  test_length<std::ptrdiff_t>("t");
-  long double max = max_value<long double>();
-  EXPECT_PRINTF(fmt::format("{:.6}", max), "%g", max);
-  EXPECT_PRINTF(fmt::format("{:.6}", max), "%Lg", max);
-}
-
-TEST(printf_test, bool) {
-  EXPECT_PRINTF("1", "%d", true);
-  EXPECT_PRINTF("true", "%s", true);
-}
-
-TEST(printf_test, int) {
-  EXPECT_PRINTF("-42", "%d", -42);
-  EXPECT_PRINTF("-42", "%i", -42);
-  unsigned u = 0 - 42u;
-  EXPECT_PRINTF(fmt::format("{}", u), "%u", -42);
-  EXPECT_PRINTF(fmt::format("{:o}", u), "%o", -42);
-  EXPECT_PRINTF(fmt::format("{:x}", u), "%x", -42);
-  EXPECT_PRINTF(fmt::format("{:X}", u), "%X", -42);
-}
-
-TEST(printf_test, long_long) {
-  // fmt::printf allows passing long long arguments to %d without length
-  // specifiers.
-  long long max = max_value<long long>();
-  EXPECT_PRINTF(fmt::format("{}", max), "%d", max);
-}
-
-TEST(printf_test, float) {
-  EXPECT_PRINTF("392.650000", "%f", 392.65);
-  EXPECT_PRINTF("392.65", "%.2f", 392.65);
-  EXPECT_PRINTF("392.6", "%.1f", 392.65);
-  EXPECT_PRINTF("393", "%.f", 392.65);
-  EXPECT_PRINTF("392.650000", "%F", 392.65);
-  char buffer[256];
-  safe_sprintf(buffer, "%e", 392.65);
-  EXPECT_PRINTF(buffer, "%e", 392.65);
-  safe_sprintf(buffer, "%E", 392.65);
-  EXPECT_PRINTF(buffer, "%E", 392.65);
-  EXPECT_PRINTF("392.65", "%g", 392.65);
-  EXPECT_PRINTF("392.65", "%G", 392.65);
-  EXPECT_PRINTF("392", "%g", 392.0);
-  EXPECT_PRINTF("392", "%G", 392.0);
-  EXPECT_PRINTF("4.56e-07", "%g", 0.000000456);
-  safe_sprintf(buffer, "%a", -392.65);
-  EXPECT_EQ(buffer, format("{:a}", -392.65));
-  safe_sprintf(buffer, "%A", -392.65);
-  EXPECT_EQ(buffer, format("{:A}", -392.65));
-}
-
-TEST(printf_test, inf) {
-  double inf = std::numeric_limits<double>::infinity();
-  for (const char* type = "fega"; *type; ++type) {
-    EXPECT_PRINTF("inf", fmt::format("%{}", *type), inf);
-    char upper = static_cast<char>(std::toupper(*type));
-    EXPECT_PRINTF("INF", fmt::format("%{}", upper), inf);
-  }
-}
-
-TEST(printf_test, char) {
-  EXPECT_PRINTF("x", "%c", 'x');
-  int max = max_value<int>();
-  EXPECT_PRINTF(fmt::format("{}", static_cast<char>(max)), "%c", max);
-  // EXPECT_PRINTF("x", "%lc", L'x');
-  EXPECT_PRINTF(L"x", L"%c", L'x');
-  EXPECT_PRINTF(fmt::format(L"{}", static_cast<wchar_t>(max)), L"%c", max);
-}
-
-TEST(printf_test, string) {
-  EXPECT_PRINTF("abc", "%s", "abc");
-  const char* null_str = nullptr;
-  EXPECT_PRINTF("(null)", "%s", null_str);
-  EXPECT_PRINTF("    (null)", "%10s", null_str);
-  EXPECT_PRINTF(L"abc", L"%s", L"abc");
-  const wchar_t* null_wstr = nullptr;
-  EXPECT_PRINTF(L"(null)", L"%s", null_wstr);
-  EXPECT_PRINTF(L"    (null)", L"%10s", null_wstr);
-}
-
-TEST(printf_test, pointer) {
-  int n;
-  void* p = &n;
-  EXPECT_PRINTF(fmt::format("{}", p), "%p", p);
-  p = nullptr;
-  EXPECT_PRINTF("(nil)", "%p", p);
-  EXPECT_PRINTF("     (nil)", "%10p", p);
-  const char* s = "test";
-  EXPECT_PRINTF(fmt::format("{:p}", s), "%p", s);
-  const char* null_str = nullptr;
-  EXPECT_PRINTF("(nil)", "%p", null_str);
-
-  p = &n;
-  EXPECT_PRINTF(fmt::format(L"{}", p), L"%p", p);
-  p = nullptr;
-  EXPECT_PRINTF(L"(nil)", L"%p", p);
-  EXPECT_PRINTF(L"     (nil)", L"%10p", p);
-  const wchar_t* w = L"test";
-  EXPECT_PRINTF(fmt::format(L"{:p}", w), L"%p", w);
-  const wchar_t* null_wstr = nullptr;
-  EXPECT_PRINTF(L"(nil)", L"%p", null_wstr);
-}
-
-enum test_enum { answer = 42 };
-
-TEST(printf_test, enum) {
-  EXPECT_PRINTF("42", "%d", answer);
-  volatile test_enum volatile_enum = answer;
-  EXPECT_PRINTF("42", "%d", volatile_enum);
-}
-
-#if FMT_USE_FCNTL
-TEST(printf_test, examples) {
-  const char* weekday = "Thursday";
-  const char* month = "August";
-  int day = 21;
-  EXPECT_WRITE(stdout, fmt::printf("%1$s, %3$d %2$s", weekday, month, day),
-               "Thursday, 21 August");
-}
-
-TEST(printf_test, printf_error) {
-  fmt::file read_end, write_end;
-  fmt::file::pipe(read_end, write_end);
-  int result = fmt::fprintf(read_end.fdopen("r").get(), "test");
-  EXPECT_LT(result, 0);
-}
-#endif
-
-TEST(printf_test, wide_string) {
-  EXPECT_EQ(L"abc", fmt::sprintf(L"%s", L"abc"));
-}
-
-TEST(printf_test, printf_custom) {
-  EXPECT_EQ("abc", test_sprintf("%s", test_string("abc")));
-}
-
-TEST(printf_test, vprintf) {
-  fmt::format_arg_store<fmt::printf_context, int> as{42};
-  fmt::basic_format_args<fmt::printf_context> args(as);
-  EXPECT_EQ(fmt::vsprintf("%d", args), "42");
-  EXPECT_WRITE(stdout, fmt::vprintf("%d", args), "42");
-  EXPECT_WRITE(stdout, fmt::vfprintf(stdout, "%d", args), "42");
-}
-
-template <typename... Args>
-void check_format_string_regression(fmt::string_view s, const Args&... args) {
-  fmt::sprintf(s, args...);
-}
-
-TEST(printf_test, check_format_string_regression) {
-  check_format_string_regression("%c%s", 'x', "");
-}
-
-TEST(printf_test, fixed_large_exponent) {
-  EXPECT_EQ("1000000000000000000000", fmt::sprintf("%.*f", -13, 1e21));
-}
-
-TEST(printf_test, vsprintf_make_args_example) {
-  fmt::format_arg_store<fmt::printf_context, int, const char*> as{42,
-                                                                  "something"};
-  fmt::basic_format_args<fmt::printf_context> args(as);
-  EXPECT_EQ("[42] something happened", fmt::vsprintf("[%d] %s happened", args));
-  auto as2 = fmt::make_printf_args(42, "something");
-  fmt::basic_format_args<fmt::printf_context> args2(as2);
-  EXPECT_EQ("[42] something happened",
-            fmt::vsprintf("[%d] %s happened", args2));
-  EXPECT_EQ("[42] something happened",
-            fmt::vsprintf("[%d] %s happened",
-                          {fmt::make_printf_args(42, "something")}));
-}
-
-TEST(printf_test, vsprintf_make_wargs_example) {
-  fmt::format_arg_store<fmt::wprintf_context, int, const wchar_t*> as{
-      42, L"something"};
-  fmt::basic_format_args<fmt::wprintf_context> args(as);
-  EXPECT_EQ(L"[42] something happened",
-            fmt::vsprintf(L"[%d] %s happened", args));
-  auto as2 = fmt::make_wprintf_args(42, L"something");
-  fmt::basic_format_args<fmt::wprintf_context> args2(as2);
-  EXPECT_EQ(L"[42] something happened",
-            fmt::vsprintf(L"[%d] %s happened", args2));
-  EXPECT_EQ(L"[42] something happened",
-            fmt::vsprintf(L"[%d] %s happened",
-                          {fmt::make_wprintf_args(42, L"something")}));
-}
diff --git a/3rdparty/fmt/test/ranges-odr-test.cc b/3rdparty/fmt/test/ranges-odr-test.cc
deleted file mode 100644
index 031354d3..00000000
--- a/3rdparty/fmt/test/ranges-odr-test.cc
+++ /dev/null
@@ -1,17 +0,0 @@
-// Formatting library for C++ - the core API
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include <vector>
-
-#include "fmt/ranges.h"
-#include "gtest/gtest.h"
-
-// call fmt::format from another translation unit to test ODR
-TEST(ranges_odr_test, format_vector) {
-  auto v = std::vector<int>{1, 2, 3, 5, 7, 11};
-  EXPECT_EQ(fmt::format("{}", v), "[1, 2, 3, 5, 7, 11]");
-}
diff --git a/3rdparty/fmt/test/ranges-test.cc b/3rdparty/fmt/test/ranges-test.cc
deleted file mode 100644
index 63cb8c8b..00000000
--- a/3rdparty/fmt/test/ranges-test.cc
+++ /dev/null
@@ -1,363 +0,0 @@
-// Formatting library for C++ - the core API
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-//
-// Copyright (c) 2018 - present, Remotion (Igor Schulz)
-// All Rights Reserved
-// {fmt} support for ranges, containers and types tuple interface.
-
-#include "fmt/ranges.h"
-
-#include <map>
-#include <string>
-#include <vector>
-
-#include "gtest/gtest.h"
-
-#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 601
-#  define FMT_RANGES_TEST_ENABLE_C_STYLE_ARRAY
-#endif
-
-#if !FMT_MSC_VER || FMT_MSC_VER > 1910
-#  define FMT_RANGES_TEST_ENABLE_JOIN
-#  define FMT_RANGES_TEST_ENABLE_FORMAT_STRUCT
-#endif
-
-#ifdef FMT_RANGES_TEST_ENABLE_C_STYLE_ARRAY
-TEST(ranges_test, format_array) {
-  int arr[] = {1, 2, 3, 5, 7, 11};
-  EXPECT_EQ(fmt::format("{}", arr), "[1, 2, 3, 5, 7, 11]");
-}
-
-TEST(ranges_test, format_2d_array) {
-  int arr[][2] = {{1, 2}, {3, 5}, {7, 11}};
-  EXPECT_EQ(fmt::format("{}", arr), "[[1, 2], [3, 5], [7, 11]]");
-}
-
-TEST(ranges_test, format_array_of_literals) {
-  const char* arr[] = {"1234", "abcd"};
-  EXPECT_EQ(fmt::format("{}", arr), "[\"1234\", \"abcd\"]");
-}
-#endif  // FMT_RANGES_TEST_ENABLE_C_STYLE_ARRAY
-
-TEST(ranges_test, format_vector) {
-  auto v = std::vector<int>{1, 2, 3, 5, 7, 11};
-  EXPECT_EQ(fmt::format("{}", v), "[1, 2, 3, 5, 7, 11]");
-}
-
-TEST(ranges_test, format_vector2) {
-  auto v = std::vector<std::vector<int>>{{1, 2}, {3, 5}, {7, 11}};
-  EXPECT_EQ(fmt::format("{}", v), "[[1, 2], [3, 5], [7, 11]]");
-}
-
-TEST(ranges_test, format_map) {
-  auto m = std::map<std::string, int>{{"one", 1}, {"two", 2}};
-  EXPECT_EQ(fmt::format("{}", m), "{\"one\": 1, \"two\": 2}");
-}
-
-TEST(ranges_test, format_set) {
-  EXPECT_EQ(fmt::format("{}", std::set<std::string>{"one", "two"}),
-            "{\"one\", \"two\"}");
-}
-
-TEST(ranges_test, format_pair) {
-  auto p = std::pair<int, float>(42, 1.5f);
-  EXPECT_EQ(fmt::format("{}", p), "(42, 1.5)");
-}
-
-TEST(ranges_test, format_tuple) {
-  auto t =
-      std::tuple<int, float, std::string, char>(42, 1.5f, "this is tuple", 'i');
-  EXPECT_EQ(fmt::format("{}", t), "(42, 1.5, \"this is tuple\", 'i')");
-  EXPECT_EQ(fmt::format("{}", std::tuple<>()), "()");
-}
-
-#ifdef FMT_RANGES_TEST_ENABLE_FORMAT_STRUCT
-struct tuple_like {
-  int i;
-  std::string str;
-
-  template <size_t N> fmt::enable_if_t<N == 0, int> get() const noexcept {
-    return i;
-  }
-  template <size_t N>
-  fmt::enable_if_t<N == 1, fmt::string_view> get() const noexcept {
-    return str;
-  }
-};
-
-template <size_t N>
-auto get(const tuple_like& t) noexcept -> decltype(t.get<N>()) {
-  return t.get<N>();
-}
-
-namespace std {
-template <>
-struct tuple_size<tuple_like> : std::integral_constant<size_t, 2> {};
-
-template <size_t N> struct tuple_element<N, tuple_like> {
-  using type = decltype(std::declval<tuple_like>().get<N>());
-};
-}  // namespace std
-
-TEST(ranges_test, format_struct) {
-  auto t = tuple_like{42, "foo"};
-  EXPECT_EQ(fmt::format("{}", t), "(42, \"foo\")");
-}
-#endif  // FMT_RANGES_TEST_ENABLE_FORMAT_STRUCT
-
-TEST(ranges_test, format_to) {
-  char buf[10];
-  auto end = fmt::format_to(buf, "{}", std::vector<int>{1, 2, 3});
-  *end = '\0';
-  EXPECT_STREQ(buf, "[1, 2, 3]");
-}
-
-struct path_like {
-  const path_like* begin() const;
-  const path_like* end() const;
-
-  operator std::string() const;
-};
-
-TEST(ranges_test, path_like) {
-  EXPECT_FALSE((fmt::is_range<path_like, char>::value));
-}
-
-#ifdef FMT_USE_STRING_VIEW
-struct string_like {
-  const char* begin();
-  const char* end();
-  explicit operator fmt::string_view() const { return "foo"; }
-  explicit operator std::string_view() const { return "foo"; }
-};
-
-TEST(ranges_test, format_string_like) {
-  EXPECT_EQ(fmt::format("{}", string_like()), "foo");
-}
-#endif  // FMT_USE_STRING_VIEW
-
-// A range that provides non-const only begin()/end() to test fmt::join handles
-// that.
-//
-// Some ranges (e.g. those produced by range-v3's views::filter()) can cache
-// information during iteration so they only provide non-const begin()/end().
-template <typename T> class non_const_only_range {
- private:
-  std::vector<T> vec;
-
- public:
-  using const_iterator = typename ::std::vector<T>::const_iterator;
-
-  template <typename... Args>
-  explicit non_const_only_range(Args&&... args)
-      : vec(std::forward<Args>(args)...) {}
-
-  const_iterator begin() { return vec.begin(); }
-  const_iterator end() { return vec.end(); }
-};
-
-template <typename T> class noncopyable_range {
- private:
-  std::vector<T> vec;
-
- public:
-  using const_iterator = typename ::std::vector<T>::const_iterator;
-
-  template <typename... Args>
-  explicit noncopyable_range(Args&&... args)
-      : vec(std::forward<Args>(args)...) {}
-
-  noncopyable_range(noncopyable_range const&) = delete;
-  noncopyable_range(noncopyable_range&) = delete;
-
-  const_iterator begin() const { return vec.begin(); }
-  const_iterator end() const { return vec.end(); }
-};
-
-TEST(ranges_test, range) {
-  noncopyable_range<int> w(3u, 0);
-  EXPECT_EQ(fmt::format("{}", w), "[0, 0, 0]");
-  EXPECT_EQ(fmt::format("{}", noncopyable_range<int>(3u, 0)), "[0, 0, 0]");
-
-  non_const_only_range<int> x(3u, 0);
-  EXPECT_EQ(fmt::format("{}", x), "[0, 0, 0]");
-  EXPECT_EQ(fmt::format("{}", non_const_only_range<int>(3u, 0)), "[0, 0, 0]");
-
-  auto y = std::vector<int>(3u, 0);
-  EXPECT_EQ(fmt::format("{}", y), "[0, 0, 0]");
-  EXPECT_EQ(fmt::format("{}", std::vector<int>(3u, 0)), "[0, 0, 0]");
-
-  const auto z = std::vector<int>(3u, 0);
-  EXPECT_EQ(fmt::format("{}", z), "[0, 0, 0]");
-}
-
-enum test_enum { foo };
-
-TEST(ranges_test, enum_range) {
-  auto v = std::vector<test_enum>{test_enum::foo};
-  EXPECT_EQ(fmt::format("{}", v), "[0]");
-}
-
-#if !FMT_MSC_VER
-struct unformattable {};
-
-TEST(ranges_test, unformattable_range) {
-  EXPECT_FALSE((fmt::has_formatter<std::vector<unformattable>,
-                                   fmt::format_context>::value));
-}
-#endif
-
-#ifdef FMT_RANGES_TEST_ENABLE_JOIN
-TEST(ranges_test, join_tuple) {
-  // Value tuple args.
-  auto t1 = std::tuple<char, int, float>('a', 1, 2.0f);
-  EXPECT_EQ(fmt::format("({})", fmt::join(t1, ", ")), "(a, 1, 2)");
-
-  // Testing lvalue tuple args.
-  int x = 4;
-  auto t2 = std::tuple<char, int&>('b', x);
-  EXPECT_EQ(fmt::format("{}", fmt::join(t2, " + ")), "b + 4");
-
-  // Empty tuple.
-  auto t3 = std::tuple<>();
-  EXPECT_EQ(fmt::format("{}", fmt::join(t3, "|")), "");
-
-  // Single element tuple.
-  auto t4 = std::tuple<float>(4.0f);
-  EXPECT_EQ(fmt::format("{}", fmt::join(t4, "/")), "4");
-
-#  if FMT_TUPLE_JOIN_SPECIFIERS
-  // Specs applied to each element.
-  auto t5 = std::tuple<int, int, long>(-3, 100, 1);
-  EXPECT_EQ(fmt::format("{:+03}", fmt::join(t5, ", ")), "-03, +100, +01");
-
-  auto t6 = std::tuple<float, double, long double>(3, 3.14, 3.1415);
-  EXPECT_EQ(fmt::format("{:5.5f}", fmt::join(t6, ", ")),
-            "3.00000, 3.14000, 3.14150");
-
-  // Testing lvalue tuple args.
-  int y = -1;
-  auto t7 = std::tuple<int, int&, const int&>(3, y, y);
-  EXPECT_EQ(fmt::format("{:03}", fmt::join(t7, ", ")), "003, -01, -01");
-#  endif
-}
-
-TEST(ranges_test, join_initializer_list) {
-  EXPECT_EQ(fmt::format("{}", fmt::join({1, 2, 3}, ", ")), "1, 2, 3");
-  EXPECT_EQ(fmt::format("{}", fmt::join({"fmt", "rocks", "!"}, " ")),
-            "fmt rocks !");
-}
-
-struct zstring_sentinel {};
-
-bool operator==(const char* p, zstring_sentinel) { return *p == '\0'; }
-bool operator!=(const char* p, zstring_sentinel) { return *p != '\0'; }
-
-struct zstring {
-  const char* p;
-  const char* begin() const { return p; }
-  zstring_sentinel end() const { return {}; }
-};
-
-#  ifdef __cpp_lib_ranges
-struct cpp20_only_range {
-  struct iterator {
-    int val = 0;
-
-    using value_type = int;
-    using difference_type = std::ptrdiff_t;
-    using iterator_concept = std::input_iterator_tag;
-
-    iterator() = default;
-    iterator(int i) : val(i) {}
-    int operator*() const { return val; }
-    iterator& operator++() {
-      ++val;
-      return *this;
-    }
-    void operator++(int) { ++*this; }
-    bool operator==(const iterator& rhs) const { return val == rhs.val; }
-  };
-
-  int lo;
-  int hi;
-
-  iterator begin() const { return iterator(lo); }
-  iterator end() const { return iterator(hi); }
-};
-
-static_assert(std::input_iterator<cpp20_only_range::iterator>);
-#  endif
-
-TEST(ranges_test, join_sentinel) {
-  auto hello = zstring{"hello"};
-  EXPECT_EQ(fmt::format("{}", hello), "['h', 'e', 'l', 'l', 'o']");
-  EXPECT_EQ(fmt::format("{}", fmt::join(hello, "_")), "h_e_l_l_o");
-}
-
-TEST(ranges_test, join_range) {
-  noncopyable_range<int> w(3u, 0);
-  EXPECT_EQ(fmt::format("{}", fmt::join(w, ",")), "0,0,0");
-  EXPECT_EQ(fmt::format("{}", fmt::join(noncopyable_range<int>(3u, 0), ",")),
-            "0,0,0");
-
-  non_const_only_range<int> x(3u, 0);
-  EXPECT_EQ(fmt::format("{}", fmt::join(x, ",")), "0,0,0");
-  EXPECT_EQ(fmt::format("{}", fmt::join(non_const_only_range<int>(3u, 0), ",")),
-            "0,0,0");
-
-  auto y = std::vector<int>(3u, 0);
-  EXPECT_EQ(fmt::format("{}", fmt::join(y, ",")), "0,0,0");
-  EXPECT_EQ(fmt::format("{}", fmt::join(std::vector<int>(3u, 0), ",")),
-            "0,0,0");
-
-  const auto z = std::vector<int>(3u, 0);
-  EXPECT_EQ(fmt::format("{}", fmt::join(z, ",")), "0,0,0");
-
-#  ifdef __cpp_lib_ranges
-  EXPECT_EQ(fmt::format("{}", cpp20_only_range{.lo = 0, .hi = 5}),
-            "[0, 1, 2, 3, 4]");
-  EXPECT_EQ(
-      fmt::format("{}", fmt::join(cpp20_only_range{.lo = 0, .hi = 5}, ",")),
-      "0,1,2,3,4");
-#  endif
-}
-#endif  // FMT_RANGES_TEST_ENABLE_JOIN
-
-TEST(ranges_test, is_printable) {
-  using fmt::detail::is_printable;
-  EXPECT_TRUE(is_printable(0x0323));
-  EXPECT_FALSE(is_printable(0x0378));
-  EXPECT_FALSE(is_printable(0x110000));
-}
-
-TEST(ranges_test, escape_string) {
-  using vec = std::vector<std::string>;
-  EXPECT_EQ(fmt::format("{}", vec{"\n\r\t\"\\"}), "[\"\\n\\r\\t\\\"\\\\\"]");
-  EXPECT_EQ(fmt::format("{}", vec{"\x07"}), "[\"\\x07\"]");
-  EXPECT_EQ(fmt::format("{}", vec{"\x7f"}), "[\"\\x7f\"]");
-  EXPECT_EQ(fmt::format("{}", vec{"n\xcc\x83"}), "[\"n\xcc\x83\"]");
-
-  if (fmt::detail::is_utf8()) {
-    EXPECT_EQ(fmt::format("{}", vec{"\xcd\xb8"}), "[\"\\u0378\"]");
-    // Unassigned Unicode code points.
-    EXPECT_EQ(fmt::format("{}", vec{"\xf0\xaa\x9b\x9e"}), "[\"\\U0002a6de\"]");
-    EXPECT_EQ(fmt::format("{}", vec{"\xf4\x8f\xbf\xc0"}),
-              "[\"\\xf4\\x8f\\xbf\\xc0\"]");
-  }
-}
-
-#ifdef FMT_USE_STRING_VIEW
-struct convertible_to_string_view {
-  operator std::string_view() const { return "foo"; }
-};
-
-TEST(ranges_test, escape_convertible_to_string_view) {
-  EXPECT_EQ(fmt::format("{}", std::vector<convertible_to_string_view>(1)),
-            "[\"foo\"]");
-}
-#endif  // FMT_USE_STRING_VIEW
diff --git a/3rdparty/fmt/test/scan-test.cc b/3rdparty/fmt/test/scan-test.cc
deleted file mode 100644
index 7e327ea3..00000000
--- a/3rdparty/fmt/test/scan-test.cc
+++ /dev/null
@@ -1,116 +0,0 @@
-// Formatting library for C++ - scanning API test
-//
-// Copyright (c) 2019 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "scan.h"
-
-#include <time.h>
-
-#include <climits>
-
-#include "gmock/gmock.h"
-#include "gtest-extra.h"
-
-TEST(scan_test, read_text) {
-  auto s = fmt::string_view("foo");
-  auto end = fmt::scan(s, "foo");
-  EXPECT_EQ(end, s.end());
-  EXPECT_THROW_MSG(fmt::scan("fob", "foo"), fmt::format_error, "invalid input");
-}
-
-TEST(scan_test, read_int) {
-  auto n = int();
-  fmt::scan("42", "{}", n);
-  EXPECT_EQ(n, 42);
-  fmt::scan("-42", "{}", n);
-  EXPECT_EQ(n, -42);
-}
-
-TEST(scan_test, read_longlong) {
-  long long n = 0;
-  fmt::scan("42", "{}", n);
-  EXPECT_EQ(n, 42);
-  fmt::scan("-42", "{}", n);
-  EXPECT_EQ(n, -42);
-}
-
-TEST(scan_test, read_uint) {
-  auto n = unsigned();
-  fmt::scan("42", "{}", n);
-  EXPECT_EQ(n, 42);
-  EXPECT_THROW_MSG(fmt::scan("-42", "{}", n), fmt::format_error,
-                   "invalid input");
-}
-
-TEST(scan_test, read_ulonglong) {
-  unsigned long long n = 0;
-  fmt::scan("42", "{}", n);
-  EXPECT_EQ(n, 42);
-  EXPECT_THROW_MSG(fmt::scan("-42", "{}", n), fmt::format_error,
-                   "invalid input");
-}
-
-TEST(scan_test, read_string) {
-  auto s = std::string();
-  fmt::scan("foo", "{}", s);
-  EXPECT_EQ(s, "foo");
-}
-
-TEST(scan_test, read_string_view) {
-  auto s = fmt::string_view();
-  fmt::scan("foo", "{}", s);
-  EXPECT_EQ(s, "foo");
-}
-
-#ifndef _WIN32
-namespace fmt {
-template <> struct scanner<tm> {
-  std::string format;
-
-  scan_parse_context::iterator parse(scan_parse_context& ctx) {
-    auto it = ctx.begin();
-    if (it != ctx.end() && *it == ':') ++it;
-    auto end = it;
-    while (end != ctx.end() && *end != '}') ++end;
-    format.reserve(detail::to_unsigned(end - it + 1));
-    format.append(it, end);
-    format.push_back('\0');
-    return end;
-  }
-
-  template <class ScanContext>
-  typename ScanContext::iterator scan(tm& t, ScanContext& ctx) {
-    auto result = strptime(ctx.begin(), format.c_str(), &t);
-    if (!result) throw format_error("failed to parse time");
-    return result;
-  }
-};
-}  // namespace fmt
-
-TEST(scan_test, read_custom) {
-  auto input = "Date: 1985-10-25";
-  auto t = tm();
-  fmt::scan(input, "Date: {0:%Y-%m-%d}", t);
-  EXPECT_EQ(t.tm_year, 85);
-  EXPECT_EQ(t.tm_mon, 9);
-  EXPECT_EQ(t.tm_mday, 25);
-}
-#endif
-
-TEST(scan_test, invalid_format) {
-  EXPECT_THROW_MSG(fmt::scan("", "{}"), fmt::format_error,
-                   "argument index out of range");
-  EXPECT_THROW_MSG(fmt::scan("", "{"), fmt::format_error,
-                   "invalid format string");
-}
-
-TEST(scan_test, example) {
-  auto key = std::string();
-  auto value = int();
-  fmt::scan("answer = 42", "{} = {}", key, value);
-  EXPECT_EQ(key, "answer");
-  EXPECT_EQ(value, 42);
-}
diff --git a/3rdparty/fmt/test/scan.h b/3rdparty/fmt/test/scan.h
deleted file mode 100644
index 41748ae8..00000000
--- a/3rdparty/fmt/test/scan.h
+++ /dev/null
@@ -1,241 +0,0 @@
-// Formatting library for C++ - scanning API proof of concept
-//
-// Copyright (c) 2019 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include <array>
-#include <cassert>
-#include <climits>
-
-#include "fmt/format.h"
-
-FMT_BEGIN_NAMESPACE
-template <typename T, typename Char = char> struct scanner {
-  // A deleted default constructor indicates a disabled scanner.
-  scanner() = delete;
-};
-
-class scan_parse_context {
- private:
-  string_view format_;
-
- public:
-  using iterator = string_view::iterator;
-
-  explicit FMT_CONSTEXPR scan_parse_context(string_view format)
-      : format_(format) {}
-
-  FMT_CONSTEXPR iterator begin() const { return format_.begin(); }
-  FMT_CONSTEXPR iterator end() const { return format_.end(); }
-
-  void advance_to(iterator it) {
-    format_.remove_prefix(detail::to_unsigned(it - begin()));
-  }
-};
-
-struct scan_context {
- private:
-  string_view input_;
-
- public:
-  using iterator = const char*;
-
-  explicit scan_context(string_view input) : input_(input) {}
-
-  iterator begin() const { return input_.data(); }
-  iterator end() const { return begin() + input_.size(); }
-
-  void advance_to(iterator it) {
-    input_.remove_prefix(detail::to_unsigned(it - begin()));
-  }
-};
-
-namespace detail {
-enum class scan_type {
-  none_type,
-  int_type,
-  uint_type,
-  long_long_type,
-  ulong_long_type,
-  string_type,
-  string_view_type,
-  custom_type
-};
-
-struct custom_scan_arg {
-  void* value;
-  void (*scan)(void* arg, scan_parse_context& parse_ctx, scan_context& ctx);
-};
-
-class scan_arg {
- public:
-  scan_type type;
-  union {
-    int* int_value;
-    unsigned* uint_value;
-    long long* long_long_value;
-    unsigned long long* ulong_long_value;
-    std::string* string;
-    fmt::string_view* string_view;
-    custom_scan_arg custom;
-    // TODO: more types
-  };
-
-  scan_arg() : type(scan_type::none_type) {}
-  scan_arg(int& value) : type(scan_type::int_type), int_value(&value) {}
-  scan_arg(unsigned& value) : type(scan_type::uint_type), uint_value(&value) {}
-  scan_arg(long long& value)
-      : type(scan_type::long_long_type), long_long_value(&value) {}
-  scan_arg(unsigned long long& value)
-      : type(scan_type::ulong_long_type), ulong_long_value(&value) {}
-  scan_arg(std::string& value) : type(scan_type::string_type), string(&value) {}
-  scan_arg(fmt::string_view& value)
-      : type(scan_type::string_view_type), string_view(&value) {}
-  template <typename T> scan_arg(T& value) : type(scan_type::custom_type) {
-    custom.value = &value;
-    custom.scan = scan_custom_arg<T>;
-  }
-
- private:
-  template <typename T>
-  static void scan_custom_arg(void* arg, scan_parse_context& parse_ctx,
-                              scan_context& ctx) {
-    scanner<T> s;
-    parse_ctx.advance_to(s.parse(parse_ctx));
-    ctx.advance_to(s.scan(*static_cast<T*>(arg), ctx));
-  }
-};
-}  // namespace detail
-
-struct scan_args {
-  int size;
-  const detail::scan_arg* data;
-
-  template <size_t N>
-  scan_args(const std::array<detail::scan_arg, N>& store)
-      : size(N), data(store.data()) {
-    static_assert(N < INT_MAX, "too many arguments");
-  }
-};
-
-namespace detail {
-
-struct scan_handler : error_handler {
- private:
-  scan_parse_context parse_ctx_;
-  scan_context scan_ctx_;
-  scan_args args_;
-  int next_arg_id_;
-  scan_arg arg_;
-
-  template <typename T = unsigned> T read_uint() {
-    T value = 0;
-    auto it = scan_ctx_.begin(), end = scan_ctx_.end();
-    while (it != end) {
-      char c = *it++;
-      if (c < '0' || c > '9') on_error("invalid input");
-      // TODO: check overflow
-      value = value * 10 + static_cast<unsigned>(c - '0');
-    }
-    scan_ctx_.advance_to(it);
-    return value;
-  }
-
-  template <typename T = int> T read_int() {
-    auto it = scan_ctx_.begin(), end = scan_ctx_.end();
-    bool negative = it != end && *it == '-';
-    if (negative) ++it;
-    scan_ctx_.advance_to(it);
-    const auto value = read_uint<typename std::make_unsigned<T>::type>();
-    if (negative) return -static_cast<T>(value);
-    return static_cast<T>(value);
-  }
-
- public:
-  scan_handler(string_view format, string_view input, scan_args args)
-      : parse_ctx_(format), scan_ctx_(input), args_(args), next_arg_id_(0) {}
-
-  const char* pos() const { return scan_ctx_.begin(); }
-
-  void on_text(const char* begin, const char* end) {
-    auto size = to_unsigned(end - begin);
-    auto it = scan_ctx_.begin();
-    if (it + size > scan_ctx_.end() ||
-        !std::equal(begin, end, make_checked(it, size))) {
-      on_error("invalid input");
-    }
-    scan_ctx_.advance_to(it + size);
-  }
-
-  FMT_CONSTEXPR int on_arg_id() { return on_arg_id(next_arg_id_++); }
-  FMT_CONSTEXPR int on_arg_id(int id) {
-    if (id >= args_.size) on_error("argument index out of range");
-    arg_ = args_.data[id];
-    return id;
-  }
-  FMT_CONSTEXPR int on_arg_id(string_view id) {
-    if (id.data()) on_error("invalid format");
-    return 0;
-  }
-
-  void on_replacement_field(int, const char*) {
-    auto it = scan_ctx_.begin(), end = scan_ctx_.end();
-    switch (arg_.type) {
-    case scan_type::int_type:
-      *arg_.int_value = read_int();
-      break;
-    case scan_type::uint_type:
-      *arg_.uint_value = read_uint();
-      break;
-    case scan_type::long_long_type:
-      *arg_.long_long_value = read_int<long long>();
-      break;
-    case scan_type::ulong_long_type:
-      *arg_.ulong_long_value = read_uint<unsigned long long>();
-      break;
-    case scan_type::string_type:
-      while (it != end && *it != ' ') arg_.string->push_back(*it++);
-      scan_ctx_.advance_to(it);
-      break;
-    case scan_type::string_view_type: {
-      auto s = it;
-      while (it != end && *it != ' ') ++it;
-      *arg_.string_view = fmt::string_view(s, to_unsigned(it - s));
-      scan_ctx_.advance_to(it);
-      break;
-    }
-    case scan_type::none_type:
-    case scan_type::custom_type:
-      assert(false);
-    }
-  }
-
-  const char* on_format_specs(int, const char* begin, const char*) {
-    if (arg_.type != scan_type::custom_type) return begin;
-    parse_ctx_.advance_to(begin);
-    arg_.custom.scan(arg_.custom.value, parse_ctx_, scan_ctx_);
-    return parse_ctx_.begin();
-  }
-};
-}  // namespace detail
-
-template <typename... Args>
-std::array<detail::scan_arg, sizeof...(Args)> make_scan_args(Args&... args) {
-  return {{args...}};
-}
-
-string_view::iterator vscan(string_view input, string_view format_str,
-                            scan_args args) {
-  detail::scan_handler h(format_str, input, args);
-  detail::parse_format_string<false>(format_str, h);
-  return input.begin() + (h.pos() - &*input.begin());
-}
-
-template <typename... Args>
-string_view::iterator scan(string_view input, string_view format_str,
-                           Args&... args) {
-  return vscan(input, format_str, make_scan_args(args...));
-}
-FMT_END_NAMESPACE
diff --git a/3rdparty/fmt/test/static-export-test/CMakeLists.txt b/3rdparty/fmt/test/static-export-test/CMakeLists.txt
deleted file mode 100644
index 7690d7b5..00000000
--- a/3rdparty/fmt/test/static-export-test/CMakeLists.txt
+++ /dev/null
@@ -1,30 +0,0 @@
-cmake_minimum_required(VERSION 3.1...3.18)
-
-project(fmt-link CXX)
-
-set(BUILD_SHARED_LIBS OFF)
-set(CMAKE_VISIBILITY_INLINES_HIDDEN TRUE)
-set(CMAKE_CXX_VISIBILITY_PRESET "hidden")
-
-# Broken LTO on GCC 4
-if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5)
-  set(BROKEN_LTO ON)
-endif ()
-
-if (NOT BROKEN_LTO AND CMAKE_VERSION VERSION_GREATER "3.8")
-  # CMake 3.9+
-  include(CheckIPOSupported)
-  check_ipo_supported(RESULT HAVE_IPO)
-  if (HAVE_IPO)
-    set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
-  endif ()
-endif ()
-
-add_subdirectory(../.. fmt)
-set_property(TARGET fmt PROPERTY POSITION_INDEPENDENT_CODE ON)
-
-add_library(library-test SHARED library.cc)
-target_link_libraries(library-test PRIVATE fmt::fmt)
-
-add_executable(exe-test main.cc)
-target_link_libraries(exe-test PRIVATE library-test)
diff --git a/3rdparty/fmt/test/static-export-test/library.cc b/3rdparty/fmt/test/static-export-test/library.cc
deleted file mode 100644
index fe4801ba..00000000
--- a/3rdparty/fmt/test/static-export-test/library.cc
+++ /dev/null
@@ -1,5 +0,0 @@
-#include <fmt/compile.h>
-
-__attribute__((visibility("default"))) std::string foo() {
-  return fmt::format(FMT_COMPILE("foo bar {}"), 4242);
-}
diff --git a/3rdparty/fmt/test/static-export-test/main.cc b/3rdparty/fmt/test/static-export-test/main.cc
deleted file mode 100644
index 38f7999e..00000000
--- a/3rdparty/fmt/test/static-export-test/main.cc
+++ /dev/null
@@ -1,6 +0,0 @@
-#include <iostream>
-#include <string>
-
-extern std::string foo();
-
-int main() { std::cout << foo() << std::endl; }
diff --git a/3rdparty/fmt/test/test-assert.h b/3rdparty/fmt/test/test-assert.h
deleted file mode 100644
index ab7b2bf7..00000000
--- a/3rdparty/fmt/test/test-assert.h
+++ /dev/null
@@ -1,39 +0,0 @@
-// Formatting library for C++ - test version of FMT_ASSERT
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_TEST_ASSERT_H_
-#define FMT_TEST_ASSERT_H_
-
-#include <stdexcept>
-
-void throw_assertion_failure(const char* message);
-#define FMT_ASSERT(condition, message) \
-  if (!(condition)) throw_assertion_failure(message);
-
-#include "gtest/gtest.h"
-
-class assertion_failure : public std::logic_error {
- public:
-  explicit assertion_failure(const char* message) : std::logic_error(message) {}
-
- private:
-  virtual void avoid_weak_vtable();
-};
-
-void assertion_failure::avoid_weak_vtable() {}
-
-// We use a separate function (rather than throw directly from FMT_ASSERT) to
-// avoid GCC's -Wterminate warning when FMT_ASSERT is used in a destructor.
-inline void throw_assertion_failure(const char* message) {
-  throw assertion_failure(message);
-}
-
-// Expects an assertion failure.
-#define EXPECT_ASSERT(stmt, message) \
-  FMT_TEST_THROW_(stmt, assertion_failure, message, GTEST_NONFATAL_FAILURE_)
-
-#endif  // FMT_TEST_ASSERT_H_
diff --git a/3rdparty/fmt/test/test-main.cc b/3rdparty/fmt/test/test-main.cc
deleted file mode 100644
index 268ed086..00000000
--- a/3rdparty/fmt/test/test-main.cc
+++ /dev/null
@@ -1,44 +0,0 @@
-// Formatting library for C++ - test main function.
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include <cstdlib>
-
-#include "gtest/gtest.h"
-
-#ifdef _WIN32
-#  include <windows.h>
-#endif
-
-#ifdef _MSC_VER
-#  include <crtdbg.h>
-#else
-#  define _CrtSetReportFile(a, b)
-#  define _CrtSetReportMode(a, b)
-#endif
-
-int main(int argc, char** argv) {
-#ifdef _WIN32
-  // Don't display any error dialogs. This also suppresses message boxes
-  // on assertion failures in MinGW where _set_error_mode/CrtSetReportMode
-  // doesn't help.
-  SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX |
-               SEM_NOOPENFILEERRORBOX);
-#endif
-  // Disable message boxes on assertion failures.
-  _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
-  _CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
-  _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
-  _CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
-  try {
-    testing::InitGoogleTest(&argc, argv);
-    testing::FLAGS_gtest_death_test_style = "threadsafe";
-    return RUN_ALL_TESTS();
-  } catch (...) {
-    // Catch all exceptions to make Coverity happy.
-  }
-  return EXIT_FAILURE;
-}
diff --git a/3rdparty/fmt/test/unicode-test.cc b/3rdparty/fmt/test/unicode-test.cc
deleted file mode 100644
index 63c828dd..00000000
--- a/3rdparty/fmt/test/unicode-test.cc
+++ /dev/null
@@ -1,48 +0,0 @@
-// Formatting library for C++ - Unicode tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include <iomanip>
-#include <locale>
-#include <vector>
-
-#include "fmt/chrono.h"
-#include "gmock/gmock.h"
-#include "util.h"  // get_locale
-
-using testing::Contains;
-
-TEST(unicode_test, is_utf8) { EXPECT_TRUE(fmt::detail::is_utf8()); }
-
-TEST(unicode_test, legacy_locale) {
-  auto loc = get_locale("ru_RU.CP1251", "Russian_Russia.1251");
-  if (loc == std::locale::classic()) return;
-
-  auto s = std::string();
-  try {
-    s = fmt::format(loc, "День недели: {:L}", fmt::weekday(1));
-  } catch (const fmt::format_error& e) {
-    // Formatting can fail due to an unsupported encoding.
-    fmt::print("Format error: {}\n", e.what());
-    return;
-  }
-
-#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 500
-  auto&& os = std::ostringstream();
-  os.imbue(loc);
-  auto tm = std::tm();
-  tm.tm_wday = 1;
-  os << std::put_time(&tm, "%a");
-  auto wd = os.str();
-  if (wd == "??") {
-    EXPECT_EQ(s, "День недели: ??");
-    fmt::print("std::locale gives ?? as a weekday.\n");
-    return;
-  }
-#endif
-  EXPECT_THAT((std::vector<std::string>{"День недели: пн", "День недели: Пн"}),
-              Contains(s));
-}
diff --git a/3rdparty/fmt/test/util.cc b/3rdparty/fmt/test/util.cc
deleted file mode 100644
index f4cb74ca..00000000
--- a/3rdparty/fmt/test/util.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-// Formatting library for C++ - test utilities
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "util.h"
-
-#include <cstring>
-
-const char* const file_content = "Don't panic!";
-
-fmt::buffered_file open_buffered_file(FILE** fp) {
-#if FMT_USE_FCNTL
-  fmt::file read_end, write_end;
-  fmt::file::pipe(read_end, write_end);
-  write_end.write(file_content, std::strlen(file_content));
-  write_end.close();
-  fmt::buffered_file f = read_end.fdopen("r");
-  if (fp) *fp = f.get();
-#else
-  fmt::buffered_file f("test-file", "w");
-  fputs(file_content, f.get());
-  if (fp) *fp = f.get();
-#endif
-  return f;
-}
-
-std::locale do_get_locale(const char* name) {
-  try {
-    return std::locale(name);
-  } catch (const std::runtime_error&) {
-  }
-  return std::locale::classic();
-}
-
-std::locale get_locale(const char* name, const char* alt_name) {
-  auto loc = do_get_locale(name);
-  if (loc == std::locale::classic() && alt_name) {
-    loc = do_get_locale(alt_name);
-  }
-  if (loc == std::locale::classic())
-    fmt::print(stderr, "{} locale is missing.\n", name);
-  return loc;
-}
diff --git a/3rdparty/fmt/test/util.h b/3rdparty/fmt/test/util.h
deleted file mode 100644
index 2e58ad95..00000000
--- a/3rdparty/fmt/test/util.h
+++ /dev/null
@@ -1,85 +0,0 @@
-// Formatting library for C++ - test utilities
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include <cstdarg>
-#include <cstdio>
-#include <locale>
-#include <string>
-
-#ifdef FMT_MODULE_TEST
-import fmt;
-#else
-#  include "fmt/os.h"
-#endif  // FMT_MODULE_TEST
-
-#ifdef _MSC_VER
-#  define FMT_VSNPRINTF vsprintf_s
-#else
-#  define FMT_VSNPRINTF vsnprintf
-#endif
-
-template <size_t SIZE>
-void safe_sprintf(char (&buffer)[SIZE], const char* format, ...) {
-  std::va_list args;
-  va_start(args, format);
-  FMT_VSNPRINTF(buffer, SIZE, format, args);
-  va_end(args);
-}
-
-extern const char* const file_content;
-
-// Opens a buffered file for reading.
-fmt::buffered_file open_buffered_file(FILE** fp = nullptr);
-
-inline FILE* safe_fopen(const char* filename, const char* mode) {
-#if defined(_WIN32) && !defined(__MINGW32__)
-  // Fix MSVC warning about "unsafe" fopen.
-  FILE* f = nullptr;
-  errno = fopen_s(&f, filename, mode);
-  return f;
-#else
-  return std::fopen(filename, mode);
-#endif
-}
-
-template <typename Char> class basic_test_string {
- private:
-  std::basic_string<Char> value_;
-
-  static const Char empty[];
-
- public:
-  explicit basic_test_string(const Char* value = empty) : value_(value) {}
-
-  const std::basic_string<Char>& value() const { return value_; }
-};
-
-template <typename Char> const Char basic_test_string<Char>::empty[] = {0};
-
-typedef basic_test_string<char> test_string;
-typedef basic_test_string<wchar_t> test_wstring;
-
-template <typename Char>
-std::basic_ostream<Char>& operator<<(std::basic_ostream<Char>& os,
-                                     const basic_test_string<Char>& s) {
-  os << s.value();
-  return os;
-}
-
-class date {
-  int year_, month_, day_;
-
- public:
-  date(int year, int month, int day) : year_(year), month_(month), day_(day) {}
-
-  int year() const { return year_; }
-  int month() const { return month_; }
-  int day() const { return day_; }
-};
-
-// Returns a locale with the given name if available or classic locale othewise.
-std::locale get_locale(const char* name, const char* alt_name = nullptr);
diff --git a/3rdparty/fmt/test/xchar-test.cc b/3rdparty/fmt/test/xchar-test.cc
deleted file mode 100644
index 346cd212..00000000
--- a/3rdparty/fmt/test/xchar-test.cc
+++ /dev/null
@@ -1,502 +0,0 @@
-// Formatting library for C++ - formatting library tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "fmt/xchar.h"
-
-#include <complex>
-#include <cwchar>
-#include <vector>
-
-#include "fmt/chrono.h"
-#include "fmt/color.h"
-#include "fmt/ostream.h"
-#include "fmt/ranges.h"
-#include "gtest-extra.h"  // Contains
-#include "util.h"         // get_locale
-
-using fmt::detail::max_value;
-using testing::Contains;
-
-namespace test_ns {
-template <typename Char> class test_string {
- private:
-  std::basic_string<Char> s_;
-
- public:
-  test_string(const Char* s) : s_(s) {}
-  const Char* data() const { return s_.data(); }
-  size_t length() const { return s_.size(); }
-  operator const Char*() const { return s_.c_str(); }
-};
-
-template <typename Char>
-fmt::basic_string_view<Char> to_string_view(const test_string<Char>& s) {
-  return {s.data(), s.length()};
-}
-
-struct non_string {};
-}  // namespace test_ns
-
-template <typename T> class is_string_test : public testing::Test {};
-
-using string_char_types = testing::Types<char, wchar_t, char16_t, char32_t>;
-TYPED_TEST_SUITE(is_string_test, string_char_types);
-
-template <typename Char>
-struct derived_from_string_view : fmt::basic_string_view<Char> {};
-
-TYPED_TEST(is_string_test, is_string) {
-  EXPECT_TRUE(fmt::detail::is_string<TypeParam*>::value);
-  EXPECT_TRUE(fmt::detail::is_string<const TypeParam*>::value);
-  EXPECT_TRUE(fmt::detail::is_string<TypeParam[2]>::value);
-  EXPECT_TRUE(fmt::detail::is_string<const TypeParam[2]>::value);
-  EXPECT_TRUE(fmt::detail::is_string<std::basic_string<TypeParam>>::value);
-  EXPECT_TRUE(fmt::detail::is_string<fmt::basic_string_view<TypeParam>>::value);
-  EXPECT_TRUE(
-      fmt::detail::is_string<derived_from_string_view<TypeParam>>::value);
-  using fmt_string_view = fmt::detail::std_string_view<TypeParam>;
-  EXPECT_TRUE(std::is_empty<fmt_string_view>::value !=
-              fmt::detail::is_string<fmt_string_view>::value);
-  EXPECT_TRUE(fmt::detail::is_string<test_ns::test_string<TypeParam>>::value);
-  EXPECT_FALSE(fmt::detail::is_string<test_ns::non_string>::value);
-}
-
-// std::is_constructible is broken in MSVC until version 2015.
-#if !FMT_MSC_VER || FMT_MSC_VER >= 1900
-struct explicitly_convertible_to_wstring_view {
-  explicit operator fmt::wstring_view() const { return L"foo"; }
-};
-
-TEST(xchar_test, format_explicitly_convertible_to_wstring_view) {
-  EXPECT_EQ(L"foo",
-            fmt::format(L"{}", explicitly_convertible_to_wstring_view()));
-}
-#endif
-
-TEST(xchar_test, format) {
-  EXPECT_EQ(L"42", fmt::format(L"{}", 42));
-  EXPECT_EQ(L"4.2", fmt::format(L"{}", 4.2));
-  EXPECT_EQ(L"abc", fmt::format(L"{}", L"abc"));
-  EXPECT_EQ(L"z", fmt::format(L"{}", L'z'));
-  EXPECT_THROW(fmt::format(L"{:*\x343E}", 42), fmt::format_error);
-  EXPECT_EQ(L"true", fmt::format(L"{}", true));
-  EXPECT_EQ(L"a", fmt::format(L"{0}", 'a'));
-  EXPECT_EQ(L"a", fmt::format(L"{0}", L'a'));
-  EXPECT_EQ(L"Cyrillic letter \x42e",
-            fmt::format(L"Cyrillic letter {}", L'\x42e'));
-  EXPECT_EQ(L"abc1", fmt::format(L"{}c{}", L"ab", 1));
-}
-
-TEST(xchar_test, is_formattable) {
-  static_assert(!fmt::is_formattable<const wchar_t*>::value, "");
-}
-
-TEST(xchar_test, compile_time_string) {
-#if defined(FMT_USE_STRING_VIEW) && __cplusplus >= 201703L
-  EXPECT_EQ(L"42", fmt::format(FMT_STRING(std::wstring_view(L"{}")), 42));
-#endif
-}
-
-#if __cplusplus > 201103L
-struct custom_char {
-  int value;
-  custom_char() = default;
-
-  template <typename T>
-  constexpr custom_char(T val) : value(static_cast<int>(val)) {}
-
-  operator int() const { return value; }
-};
-
-int to_ascii(custom_char c) { return c; }
-
-FMT_BEGIN_NAMESPACE
-template <> struct is_char<custom_char> : std::true_type {};
-FMT_END_NAMESPACE
-
-TEST(xchar_test, format_custom_char) {
-  const custom_char format[] = {'{', '}', 0};
-  auto result = fmt::format(format, custom_char('x'));
-  EXPECT_EQ(result.size(), 1);
-  EXPECT_EQ(result[0], custom_char('x'));
-}
-#endif
-
-// Convert a char8_t string to std::string. Otherwise GTest will insist on
-// inserting `char8_t` NTBS into a `char` stream which is disabled by P1423.
-template <typename S> std::string from_u8str(const S& str) {
-  return std::string(str.begin(), str.end());
-}
-
-TEST(xchar_test, format_utf8_precision) {
-  using str_type = std::basic_string<fmt::detail::char8_type>;
-  auto format =
-      str_type(reinterpret_cast<const fmt::detail::char8_type*>(u8"{:.4}"));
-  auto str = str_type(reinterpret_cast<const fmt::detail::char8_type*>(
-      u8"caf\u00e9s"));  // cafés
-  auto result = fmt::format(format, str);
-  EXPECT_EQ(fmt::detail::compute_width(result), 4);
-  EXPECT_EQ(result.size(), 5);
-  EXPECT_EQ(from_u8str(result), from_u8str(str.substr(0, 5)));
-}
-
-TEST(xchar_test, format_to) {
-  auto buf = std::vector<wchar_t>();
-  fmt::format_to(std::back_inserter(buf), L"{}{}", 42, L'\0');
-  EXPECT_STREQ(buf.data(), L"42");
-}
-
-TEST(xchar_test, vformat_to) {
-  using wcontext = fmt::wformat_context;
-  fmt::basic_format_arg<wcontext> warg = fmt::detail::make_arg<wcontext>(42);
-  auto wargs = fmt::basic_format_args<wcontext>(&warg, 1);
-  auto w = std::wstring();
-  fmt::vformat_to(std::back_inserter(w), L"{}", wargs);
-  EXPECT_EQ(L"42", w);
-  w.clear();
-  fmt::vformat_to(std::back_inserter(w), FMT_STRING(L"{}"), wargs);
-  EXPECT_EQ(L"42", w);
-}
-
-TEST(format_test, wide_format_to_n) {
-  wchar_t buffer[4];
-  buffer[3] = L'x';
-  auto result = fmt::format_to_n(buffer, 3, L"{}", 12345);
-  EXPECT_EQ(5u, result.size);
-  EXPECT_EQ(buffer + 3, result.out);
-  EXPECT_EQ(L"123x", fmt::wstring_view(buffer, 4));
-  buffer[0] = L'x';
-  buffer[1] = L'x';
-  buffer[2] = L'x';
-  result = fmt::format_to_n(buffer, 3, L"{}", L'A');
-  EXPECT_EQ(1u, result.size);
-  EXPECT_EQ(buffer + 1, result.out);
-  EXPECT_EQ(L"Axxx", fmt::wstring_view(buffer, 4));
-  result = fmt::format_to_n(buffer, 3, L"{}{} ", L'B', L'C');
-  EXPECT_EQ(3u, result.size);
-  EXPECT_EQ(buffer + 3, result.out);
-  EXPECT_EQ(L"BC x", fmt::wstring_view(buffer, 4));
-}
-
-#if FMT_USE_USER_DEFINED_LITERALS
-TEST(xchar_test, format_udl) {
-  using namespace fmt::literals;
-  EXPECT_EQ(L"{}c{}"_format(L"ab", 1), fmt::format(L"{}c{}", L"ab", 1));
-}
-
-TEST(xchar_test, named_arg_udl) {
-  using namespace fmt::literals;
-  auto udl_a =
-      fmt::format(L"{first}{second}{first}{third}", L"first"_a = L"abra",
-                  L"second"_a = L"cad", L"third"_a = 99);
-  EXPECT_EQ(
-      fmt::format(L"{first}{second}{first}{third}", fmt::arg(L"first", L"abra"),
-                  fmt::arg(L"second", L"cad"), fmt::arg(L"third", 99)),
-      udl_a);
-}
-#endif  // FMT_USE_USER_DEFINED_LITERALS
-
-TEST(xchar_test, print) {
-  // Check that the wide print overload compiles.
-  if (fmt::detail::const_check(false)) fmt::print(L"test");
-}
-
-TEST(xchar_test, join) {
-  int v[3] = {1, 2, 3};
-  EXPECT_EQ(fmt::format(L"({})", fmt::join(v, v + 3, L", ")), L"(1, 2, 3)");
-  auto t = std::tuple<wchar_t, int, float>('a', 1, 2.0f);
-  EXPECT_EQ(fmt::format(L"({})", fmt::join(t, L", ")), L"(a, 1, 2)");
-}
-
-enum streamable_enum {};
-
-std::wostream& operator<<(std::wostream& os, streamable_enum) {
-  return os << L"streamable_enum";
-}
-
-enum unstreamable_enum {};
-
-TEST(xchar_test, enum) {
-  EXPECT_EQ(L"streamable_enum", fmt::format(L"{}", streamable_enum()));
-  EXPECT_EQ(L"0", fmt::format(L"{}", unstreamable_enum()));
-}
-
-TEST(xchar_test, sign_not_truncated) {
-  wchar_t format_str[] = {
-      L'{', L':',
-      '+' | static_cast<wchar_t>(1 << fmt::detail::num_bits<char>()), L'}', 0};
-  EXPECT_THROW(fmt::format(format_str, 42), fmt::format_error);
-}
-
-namespace fake_qt {
-class QString {
- public:
-  QString(const wchar_t* s) : s_(s) {}
-  const wchar_t* utf16() const FMT_NOEXCEPT { return s_.data(); }
-  int size() const FMT_NOEXCEPT { return static_cast<int>(s_.size()); }
-
- private:
-  std::wstring s_;
-};
-
-fmt::basic_string_view<wchar_t> to_string_view(const QString& s) FMT_NOEXCEPT {
-  return {s.utf16(), static_cast<size_t>(s.size())};
-}
-}  // namespace fake_qt
-
-TEST(format_test, format_foreign_strings) {
-  using fake_qt::QString;
-  EXPECT_EQ(fmt::format(QString(L"{}"), 42), L"42");
-  EXPECT_EQ(fmt::format(QString(L"{}"), QString(L"42")), L"42");
-}
-
-TEST(xchar_test, chrono) {
-  auto tm = std::tm();
-  tm.tm_year = 116;
-  tm.tm_mon = 3;
-  tm.tm_mday = 25;
-  tm.tm_hour = 11;
-  tm.tm_min = 22;
-  tm.tm_sec = 33;
-  EXPECT_EQ(fmt::format("The date is {:%Y-%m-%d %H:%M:%S}.", tm),
-            "The date is 2016-04-25 11:22:33.");
-  EXPECT_EQ(L"42s", fmt::format(L"{}", std::chrono::seconds(42)));
-  EXPECT_EQ(fmt::format(L"{:%F}", tm), L"2016-04-25");
-  EXPECT_EQ(fmt::format(L"{:%T}", tm), L"11:22:33");
-}
-
-std::wstring system_wcsftime(const std::wstring& format, const std::tm* timeptr,
-                             std::locale* locptr = nullptr) {
-  auto loc = locptr ? *locptr : std::locale::classic();
-  auto& facet = std::use_facet<std::time_put<wchar_t>>(loc);
-  std::wostringstream os;
-  os.imbue(loc);
-  facet.put(os, os, L' ', timeptr, format.c_str(),
-            format.c_str() + format.size());
-#ifdef _WIN32
-  // Workaround a bug in older versions of Universal CRT.
-  auto str = os.str();
-  if (str == L"-0000") str = L"+0000";
-  return str;
-#else
-  return os.str();
-#endif
-}
-
-TEST(chrono_test, time_point) {
-  auto t1 = std::chrono::system_clock::now();
-
-  std::vector<std::wstring> spec_list = {
-      L"%%",  L"%n",  L"%t",  L"%Y",  L"%EY", L"%y",  L"%Oy", L"%Ey", L"%C",
-      L"%EC", L"%G",  L"%g",  L"%b",  L"%h",  L"%B",  L"%m",  L"%Om", L"%U",
-      L"%OU", L"%W",  L"%OW", L"%V",  L"%OV", L"%j",  L"%d",  L"%Od", L"%e",
-      L"%Oe", L"%a",  L"%A",  L"%w",  L"%Ow", L"%u",  L"%Ou", L"%H",  L"%OH",
-      L"%I",  L"%OI", L"%M",  L"%OM", L"%S",  L"%OS", L"%x",  L"%Ex", L"%X",
-      L"%EX", L"%D",  L"%F",  L"%R",  L"%T",  L"%p",  L"%z",  L"%Z"};
-  spec_list.push_back(L"%Y-%m-%d %H:%M:%S");
-#ifndef _WIN32
-  // Disabled on Windows, because these formats is not consistent among
-  // platforms.
-  spec_list.insert(spec_list.end(), {L"%c", L"%Ec", L"%r"});
-#endif
-
-  for (const auto& spec : spec_list) {
-    auto t = std::chrono::system_clock::to_time_t(t1);
-    auto tm = *std::localtime(&t);
-
-    auto sys_output = system_wcsftime(spec, &tm);
-
-    auto fmt_spec = fmt::format(L"{{:{}}}", spec);
-    EXPECT_EQ(sys_output, fmt::format(fmt_spec, t1));
-    EXPECT_EQ(sys_output, fmt::format(fmt_spec, tm));
-  }
-}
-
-TEST(xchar_test, color) {
-  EXPECT_EQ(fmt::format(fg(fmt::rgb(255, 20, 30)), L"rgb(255,20,30) wide"),
-            L"\x1b[38;2;255;020;030mrgb(255,20,30) wide\x1b[0m");
-}
-
-TEST(xchar_test, ostream) {
-  std::wostringstream wos;
-  fmt::print(wos, L"Don't {}!", L"panic");
-  EXPECT_EQ(L"Don't panic!", wos.str());
-}
-
-TEST(xchar_test, to_wstring) { EXPECT_EQ(L"42", fmt::to_wstring(42)); }
-
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-template <typename Char> struct numpunct : std::numpunct<Char> {
- protected:
-  Char do_decimal_point() const override { return '?'; }
-  std::string do_grouping() const override { return "\03"; }
-  Char do_thousands_sep() const override { return '~'; }
-};
-
-template <typename Char> struct no_grouping : std::numpunct<Char> {
- protected:
-  Char do_decimal_point() const override { return '.'; }
-  std::string do_grouping() const override { return ""; }
-  Char do_thousands_sep() const override { return ','; }
-};
-
-template <typename Char> struct special_grouping : std::numpunct<Char> {
- protected:
-  Char do_decimal_point() const override { return '.'; }
-  std::string do_grouping() const override { return "\03\02"; }
-  Char do_thousands_sep() const override { return ','; }
-};
-
-template <typename Char> struct small_grouping : std::numpunct<Char> {
- protected:
-  Char do_decimal_point() const override { return '.'; }
-  std::string do_grouping() const override { return "\01"; }
-  Char do_thousands_sep() const override { return ','; }
-};
-
-TEST(locale_test, localized_double) {
-  auto loc = std::locale(std::locale(), new numpunct<char>());
-  EXPECT_EQ("1?23", fmt::format(loc, "{:L}", 1.23));
-  EXPECT_EQ("1?230000", fmt::format(loc, "{:Lf}", 1.23));
-  EXPECT_EQ("1~234?5", fmt::format(loc, "{:L}", 1234.5));
-  EXPECT_EQ("12~000", fmt::format(loc, "{:L}", 12000.0));
-}
-
-TEST(locale_test, format) {
-  auto loc = std::locale(std::locale(), new numpunct<char>());
-  EXPECT_EQ("1234567", fmt::format(std::locale(), "{:L}", 1234567));
-  EXPECT_EQ("1~234~567", fmt::format(loc, "{:L}", 1234567));
-  EXPECT_EQ("-1~234~567", fmt::format(loc, "{:L}", -1234567));
-  EXPECT_EQ("-256", fmt::format(loc, "{:L}", -256));
-  fmt::format_arg_store<fmt::format_context, int> as{1234567};
-  EXPECT_EQ("1~234~567", fmt::vformat(loc, "{:L}", fmt::format_args(as)));
-  auto s = std::string();
-  fmt::format_to(std::back_inserter(s), loc, "{:L}", 1234567);
-  EXPECT_EQ("1~234~567", s);
-
-  auto no_grouping_loc = std::locale(std::locale(), new no_grouping<char>());
-  EXPECT_EQ("1234567", fmt::format(no_grouping_loc, "{:L}", 1234567));
-
-  auto special_grouping_loc =
-      std::locale(std::locale(), new special_grouping<char>());
-  EXPECT_EQ("1,23,45,678", fmt::format(special_grouping_loc, "{:L}", 12345678));
-  EXPECT_EQ("12,345", fmt::format(special_grouping_loc, "{:L}", 12345));
-
-  auto small_grouping_loc =
-      std::locale(std::locale(), new small_grouping<char>());
-  EXPECT_EQ("4,2,9,4,9,6,7,2,9,5",
-            fmt::format(small_grouping_loc, "{:L}", max_value<uint32_t>()));
-}
-
-TEST(locale_test, format_detault_align) {
-  auto loc = std::locale({}, new special_grouping<char>());
-  EXPECT_EQ("  12,345", fmt::format(loc, "{:8L}", 12345));
-}
-
-TEST(locale_test, format_plus) {
-  auto loc = std::locale({}, new special_grouping<char>());
-  EXPECT_EQ("+100", fmt::format(loc, "{:+L}", 100));
-}
-
-TEST(locale_test, wformat) {
-  auto loc = std::locale(std::locale(), new numpunct<wchar_t>());
-  EXPECT_EQ(L"1234567", fmt::format(std::locale(), L"{:L}", 1234567));
-  EXPECT_EQ(L"1~234~567", fmt::format(loc, L"{:L}", 1234567));
-  using wcontext = fmt::buffer_context<wchar_t>;
-  fmt::format_arg_store<wcontext, int> as{1234567};
-  EXPECT_EQ(L"1~234~567",
-            fmt::vformat(loc, L"{:L}", fmt::basic_format_args<wcontext>(as)));
-  EXPECT_EQ(L"1234567", fmt::format(std::locale("C"), L"{:L}", 1234567));
-
-  auto no_grouping_loc = std::locale(std::locale(), new no_grouping<wchar_t>());
-  EXPECT_EQ(L"1234567", fmt::format(no_grouping_loc, L"{:L}", 1234567));
-
-  auto special_grouping_loc =
-      std::locale(std::locale(), new special_grouping<wchar_t>());
-  EXPECT_EQ(L"1,23,45,678",
-            fmt::format(special_grouping_loc, L"{:L}", 12345678));
-
-  auto small_grouping_loc =
-      std::locale(std::locale(), new small_grouping<wchar_t>());
-  EXPECT_EQ(L"4,2,9,4,9,6,7,2,9,5",
-            fmt::format(small_grouping_loc, L"{:L}", max_value<uint32_t>()));
-}
-
-TEST(locale_test, double_formatter) {
-  auto loc = std::locale(std::locale(), new special_grouping<char>());
-  auto f = fmt::formatter<int>();
-  auto parse_ctx = fmt::format_parse_context("L");
-  f.parse(parse_ctx);
-  char buf[10] = {};
-  fmt::basic_format_context<char*, char> format_ctx(
-      buf, {}, fmt::detail::locale_ref(loc));
-  *f.format(12345, format_ctx) = 0;
-  EXPECT_STREQ("12,345", buf);
-}
-
-FMT_BEGIN_NAMESPACE
-template <class charT> struct formatter<std::complex<double>, charT> {
- private:
-  detail::dynamic_format_specs<char> specs_;
-
- public:
-  FMT_CONSTEXPR typename basic_format_parse_context<charT>::iterator parse(
-      basic_format_parse_context<charT>& ctx) {
-    using handler_type =
-        detail::dynamic_specs_handler<basic_format_parse_context<charT>>;
-    detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
-                                                detail::type::string_type);
-    auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
-    detail::parse_float_type_spec(specs_, ctx.error_handler());
-    return it;
-  }
-
-  template <class FormatContext>
-  typename FormatContext::iterator format(const std::complex<double>& c,
-                                          FormatContext& ctx) {
-    detail::handle_dynamic_spec<detail::precision_checker>(
-        specs_.precision, specs_.precision_ref, ctx);
-    auto specs = std::string();
-    if (specs_.precision > 0) specs = fmt::format(".{}", specs_.precision);
-    if (specs_.type == presentation_type::fixed_lower) specs += 'f';
-    auto real = fmt::format(ctx.locale().template get<std::locale>(),
-                            fmt::runtime("{:" + specs + "}"), c.real());
-    auto imag = fmt::format(ctx.locale().template get<std::locale>(),
-                            fmt::runtime("{:" + specs + "}"), c.imag());
-    auto fill_align_width = std::string();
-    if (specs_.width > 0) fill_align_width = fmt::format(">{}", specs_.width);
-    return format_to(ctx.out(), runtime("{:" + fill_align_width + "}"),
-                     c.real() != 0 ? fmt::format("({}+{}i)", real, imag)
-                                   : fmt::format("{}i", imag));
-  }
-};
-FMT_END_NAMESPACE
-
-TEST(locale_test, complex) {
-  std::string s = fmt::format("{}", std::complex<double>(1, 2));
-  EXPECT_EQ(s, "(1+2i)");
-  EXPECT_EQ(fmt::format("{:.2f}", std::complex<double>(1, 2)), "(1.00+2.00i)");
-  EXPECT_EQ(fmt::format("{:8}", std::complex<double>(1, 2)), "  (1+2i)");
-}
-
-TEST(locale_test, chrono_weekday) {
-  auto loc = get_locale("ru_RU.UTF-8", "Russian_Russia.1251");
-  auto loc_old = std::locale::global(loc);
-  auto mon = fmt::weekday(1);
-  EXPECT_EQ(fmt::format(L"{}", mon), L"Mon");
-  if (loc != std::locale::classic()) {
-    // {L"\x43F\x43D", L"\x41F\x43D", L"\x43F\x43D\x434", L"\x41F\x43D\x434"}
-    // {L"пн", L"Пн", L"пнд", L"Пнд"}
-    EXPECT_THAT(
-        (std::vector<std::wstring>{L"\x43F\x43D", L"\x41F\x43D",
-                                   L"\x43F\x43D\x434", L"\x41F\x43D\x434"}),
-        Contains(fmt::format(loc, L"{:L}", mon)));
-  }
-  std::locale::global(loc_old);
-}
-
-#endif  // FMT_STATIC_THOUSANDS_SEPARATOR
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 25cad5f3..479b6789 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -56,7 +56,6 @@ endif()
 # Unicode Support
 add_definitions(-DUNICODE -D_UNICODE)
 
-add_subdirectory(3rdparty/fmt)
 add_subdirectory(src)
 
 if (LIBIPC_BUILD_TESTS)
diff --git a/src/libimp/CMakeLists.txt b/src/libimp/CMakeLists.txt
index 4e5fc424..f21db725 100644
--- a/src/libimp/CMakeLists.txt
+++ b/src/libimp/CMakeLists.txt
@@ -5,6 +5,12 @@ if(NOT MSVC)
     -Wno-attributes)
 endif()
 
+FetchContent_Declare(fmtlib
+  GIT_REPOSITORY https://github.com/fmtlib/fmt.git
+  GIT_TAG        9.1.0
+)
+FetchContent_MakeAvailable(fmtlib)
+
 aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libimp SRC_FILES)
 
 file(GLOB HEAD_FILES
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 1b0c4236..ee001dd2 100755
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -12,6 +12,7 @@ FetchContent_Declare(googletest
   GIT_REPOSITORY https://github.com/google/googletest.git
   GIT_TAG        v1.12.0
 )
+set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
 if (LIBIPC_USE_STATIC_CRT)
   set(gtest_force_shared_crt OFF)
 else()

From 8540de77976f8f9610d5f2e90e5670e96db08f29 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 26 Nov 2022 17:48:18 +0800
Subject: [PATCH 107/272] add: [concur] ut for prod-cons

---
 include/libconcur/concurrent.h         | 20 ++++---
 include/libimp/nameof.h                | 40 +++++++++++++
 src/libimp/nameof.cpp                  |  7 +++
 src/libimp/platform/gnuc/demangle.h    | 41 ++++++++++++++
 src/libimp/platform/win/demangle.h     | 16 ++++++
 src/libimp/system.cpp                  |  9 +--
 src/libipc/shm.cpp                     |  4 +-
 test/concur/test_concur_concurrent.cpp | 78 ++++++++++++++++++++++++++
 8 files changed, 201 insertions(+), 14 deletions(-)
 create mode 100644 include/libimp/nameof.h
 create mode 100644 src/libimp/nameof.cpp
 create mode 100644 src/libimp/platform/gnuc/demangle.h
 create mode 100644 src/libimp/platform/win/demangle.h

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index 2e3d9003..f7595339 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -95,14 +95,14 @@ struct producer<trans::unicast, relation::single> {
     auto f_ct  = elem.get_flag();
     /// @remark Verify index.
     if ((f_ct != state::invalid_value) && 
-        (f_ct != static_cast<state::flag_t>(w_idx))) {
+        (f_ct != w_idx)) {
       return false; // full
     }
     /// @remark Get a valid index and iterate backwards.
     ctx.w_idx += 1;
     /// @remark Set data & flag.
     elem.set_data(std::forward<U>(src));
-    elem.set_flag(static_cast<state::flag_t>(~w_idx));
+    elem.set_flag(static_cast<index_t>(~w_idx));
     return true;
   }
 };
@@ -131,12 +131,12 @@ struct producer<trans::unicast, relation::multi> {
         return false; // full
       }
       /// @remark Get a valid index and iterate backwards.
-      if (!ctx.w_idx.compare_exchange_week(w_idx, w_idx + 1, std::memory_order_acq_rel)) {
+      if (!ctx.w_idx.compare_exchange_weak(w_idx, w_idx + 1, std::memory_order_acq_rel)) {
         continue;
       }
       /// @remark Set data & flag.
       elem.set_data(std::forward<U>(src));
-      elem.set_flag(~w_idx);
+      elem.set_flag(static_cast<index_t>(~w_idx));
       return true;
     }
   }
@@ -160,7 +160,7 @@ struct consumer<trans::unicast, relation::single> {
     auto &elem = elems[r_cur];
     auto f_ct  = elem.get_flag();
     /// @remark Verify index.
-    if (f_ct != ~r_idx) {
+    if (f_ct != static_cast<index_t>(~r_idx)) {
       return false; // empty
     }
     /// @remark Get a valid index and iterate backwards.
@@ -191,11 +191,11 @@ struct consumer<trans::unicast, relation::multi> {
       auto &elem = elems[r_cur];
       auto f_ct  = elem.get_flag();
       /// @remark Verify index.
-      if (f_ct != ~r_idx) {
+      if (f_ct != static_cast<index_t>(~r_idx)) {
         return false; // empty
       }
       /// @remark Get a valid index and iterate backwards.
-      if (!ctx.r_idx.compare_exchange_week(r_idx, r_idx + 1, std::memory_order_acq_rel)) {
+      if (!ctx.r_idx.compare_exchange_weak(r_idx, r_idx + 1, std::memory_order_acq_rel)) {
         continue;
       }
       /// @remark Get data & set flag.
@@ -240,7 +240,7 @@ struct consumer<trans::broadcast, relation::multi> {
 template <typename TransModT, typename ProdModT, typename ConsModT>
 struct prod_cons : producer<TransModT, ProdModT>
                  , consumer<TransModT, ConsModT> {
-  
+
   /// @brief Mixing producer and consumer context definitions.
   struct context : producer<TransModT, ProdModT>::context_impl
                  , consumer<TransModT, ConsModT>::context_impl {
@@ -249,6 +249,10 @@ struct prod_cons : producer<TransModT, ProdModT>
     constexpr context(index_t cs) noexcept
       : circ_size(cs) {}
 
+    template <typename T>
+    constexpr context(::LIBIMP_::span<element<T>> elems) noexcept
+      : circ_size(static_cast<index_t>(elems.size())) {}
+
     constexpr bool valid() const noexcept {
       /// @remark circ_size must be a power of two.
       return (circ_size > 1) && ((circ_size & (circ_size - 1)) == 0);
diff --git a/include/libimp/nameof.h b/include/libimp/nameof.h
new file mode 100644
index 00000000..84a1dbc5
--- /dev/null
+++ b/include/libimp/nameof.h
@@ -0,0 +1,40 @@
+/**
+ * @file libimp/nameof.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief Gets the name string of a type.
+ * @date 2022-11-26
+ */
+#pragma once
+
+#include <typeinfo>
+#include <string>
+#include <cstring>
+
+#include "libimp/def.h"
+#include "libimp/span.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * @brief The conventional way to obtain demangled symbol name.
+ * @see https://www.boost.org/doc/libs/1_80_0/libs/core/doc/html/core/demangle.html
+ * 
+ * @param name the mangled name
+ * @return std::string a human-readable demangled type name
+ */
+std::string demangle(span<char const> name) noexcept;
+
+/**
+ * @brief Returns an implementation defined string containing the name of the type.
+ * @see https://en.cppreference.com/w/cpp/types/type_info/name
+ * 
+ * @tparam T a type
+ * @return std::string a human-readable demangled type name
+ */
+template <typename T>
+std::string nameof() noexcept {
+  auto c_str_name = typeid(T).name();
+  return demangle({c_str_name, std::strlen(c_str_name)});
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/nameof.cpp b/src/libimp/nameof.cpp
new file mode 100644
index 00000000..ef6a4528
--- /dev/null
+++ b/src/libimp/nameof.cpp
@@ -0,0 +1,7 @@
+
+#include "libimp/detect_plat.h"
+#if defined(LIBIMP_CC_GNUC)
+# include "libimp/platform/gnuc/demangle.h"
+#else
+# include "libimp/platform/win/demangle.h"
+#endif
diff --git a/src/libimp/platform/gnuc/demangle.h b/src/libimp/platform/gnuc/demangle.h
new file mode 100644
index 00000000..e1ef540d
--- /dev/null
+++ b/src/libimp/platform/gnuc/demangle.h
@@ -0,0 +1,41 @@
+/**
+ * @file libimp/platform/gnuc/demangle.h
+ * @author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <cxxabi.h> // abi::__cxa_demangle
+
+#include <cstdlib>  // std::malloc
+
+#include "libimp/def.h"
+#include "libimp/nameof.h"
+#include "libimp/log.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * @brief The conventional way to obtain demangled symbol name.
+ * @see https://www.boost.org/doc/libs/1_80_0/libs/core/doc/html/core/demangle.html
+ * 
+ * @param name the mangled name
+ * @return std::string a human-readable demangled type name
+ */
+std::string demangle(span<char const> name) noexcept {
+  LIBIMP_LOG_();
+  /// @see https://gcc.gnu.org/onlinedocs/libstdc++/libstdc++-html-USERS-4.3/a01696.html
+  std::size_t sz = name.size() + 1;
+  char *buffer = static_cast<char *>(std::malloc(sz));
+  int status = 0;
+  char *realname = abi::__cxa_demangle(name.data(), buffer, &sz, &status);
+  if (realname == nullptr) {
+    log.error("failed: abi::__cxa_demangle(sz = {}), status = {}", sz, status);
+    std::free(buffer);
+    return {};
+  }
+  std::string demangled(realname, sz);
+  std::free(realname);
+  return demangled;
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/win/demangle.h b/src/libimp/platform/win/demangle.h
new file mode 100644
index 00000000..a8468a62
--- /dev/null
+++ b/src/libimp/platform/win/demangle.h
@@ -0,0 +1,16 @@
+/**
+ * @file libimp/platform/win/demangle.h
+ * @author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include "libimp/def.h"
+#include "libimp/nameof.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+std::string demangle(span<char const> name) noexcept {
+  return std::string(name.data(), name.size());
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/system.cpp b/src/libimp/system.cpp
index 2c1296b0..b5b73dc1 100644
--- a/src/libimp/system.cpp
+++ b/src/libimp/system.cpp
@@ -1,12 +1,13 @@
+
+#include "fmt/format.h"
+
 #include "libimp/detect_plat.h"
 #if defined(LIBIMP_OS_WIN)
-#include "libimp/platform/win/system.h"
+# include "libimp/platform/win/system.h"
 #else
-#include "libimp/platform/posix/system.h"
+# include "libimp/platform/posix/system.h"
 #endif
 
-#include "fmt/format.h"
-
 LIBIMP_NAMESPACE_BEG_
 namespace sys {
 
diff --git a/src/libipc/shm.cpp b/src/libipc/shm.cpp
index 58041935..5cc1843f 100644
--- a/src/libipc/shm.cpp
+++ b/src/libipc/shm.cpp
@@ -5,9 +5,9 @@
 
 #include "libimp/detect_plat.h"
 #if defined(LIBIMP_OS_WIN)
-#include "libipc/platform/win/shm_impl.h"
+# include "libipc/platform/win/shm_impl.h"
 #else
-#include "libipc/platform/posix/shm_impl.h"
+# include "libipc/platform/posix/shm_impl.h"
 #endif
 
 LIBIPC_NAMESPACE_BEG_
diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index e07a3f1a..f243f1e9 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -1,10 +1,17 @@
 
 #include <iostream>
+#include <thread>
+#include <vector>
+#include <atomic>
+#include <typeinfo>
 #include <cstddef>
 
 #include "gtest/gtest.h"
 
 #include "libconcur/concurrent.h"
+#include "libimp/countof.h"
+#include "libimp/log.h"
+#include "libimp/nameof.h"
 
 TEST(concurrent, cache_line_size) {
   std::cout << concur::cache_line_size << "\n";
@@ -79,4 +86,75 @@ TEST(concurrent, trunc_index) {
   EXPECT_EQ(concur::trunc_index(context{2147483648u}, 16), 16);
   EXPECT_EQ(concur::trunc_index(context{2147483648u}, 111), 111);
   EXPECT_EQ(concur::trunc_index(context{2147483648u}, -1), 2147483647);
+}
+
+namespace {
+
+template <typename PC>
+void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
+  LIBIMP_LOG_();
+  log.info("\n\tStart with: {}, {} producers, {} consumers...", imp::nameof<PC>(), np, nc);
+
+  constexpr static std::uint32_t loop_size = 100'0000;
+
+  concur::element<std::uint64_t> circ[32] {};
+  PC pc;
+  PC::context ctx {imp::make_span(circ)};
+  ASSERT_TRUE(ctx.valid());
+
+  std::atomic<std::uint64_t> sum {0};
+  std::atomic<std::size_t> running {np};
+
+  auto prod_call = [&](std::size_t n) {
+    for (std::uint32_t i = 1; i <= loop_size; ++i) {
+      std::this_thread::yield();
+      while (!pc.enqueue(imp::make_span(circ), ctx, i)) {
+        std::this_thread::yield();
+      }
+      if (i % (loop_size / 10) == 0) {
+        log.info("[{}] put count: {}", n, i);
+      }
+    }
+    --running;
+  };
+  auto cons_call = [&] {
+    for (;;) {
+      std::this_thread::yield();
+      std::uint64_t i;
+      while (!pc.dequeue(imp::make_span(circ), ctx, i)) {
+        if (running == 0) return;
+        std::this_thread::yield();
+      }
+      sum += i;
+    }
+  };
+
+  std::vector<std::thread> prods(np);
+  for (std::size_t n = 0; n < np; ++n) prods[n] = std::thread(prod_call, n);
+  std::vector<std::thread> conss(nc);
+  for (auto &c : conss) c = std::thread(cons_call);
+
+  for (auto &p : prods) p.join();
+  for (auto &c : conss) c.join();
+
+  EXPECT_EQ(sum, k * np * (loop_size * std::uint64_t(loop_size + 1)) / 2);
+}
+
+} // namespace
+
+TEST(concurrent, prod_cons) {
+  using namespace concur;
+
+  test_concur<prod_cons<trans::unicast, relation::single, relation::single>>(1, 1, 1);
+  test_concur<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 1, 1);
+  test_concur<prod_cons<trans::unicast, relation::multi , relation::single>>(1, 1, 1);
+  test_concur<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 1, 1);
+
+  test_concur<prod_cons<trans::unicast, relation::multi , relation::single>>(8, 1, 1);
+  test_concur<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 1, 1);
+
+  test_concur<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 8, 1);
+  test_concur<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 8, 1);
+
+  test_concur<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 8, 1);
 }
\ No newline at end of file

From f00ff5539df7188cede37628aa9b940b334f19ca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9C=A8=E5=A4=B4=E4=BA=91?= <orz@orzz.org>
Date: Sat, 26 Nov 2022 12:14:55 +0000
Subject: [PATCH 108/272] =?UTF-8?q?fix:=20need=20=E2=80=98typename?=
 =?UTF-8?q?=E2=80=99=20before=20=E2=80=98PC::context=E2=80=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 test/concur/test_concur_concurrent.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index f243f1e9..18efc871 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -99,7 +99,7 @@ void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
 
   concur::element<std::uint64_t> circ[32] {};
   PC pc;
-  PC::context ctx {imp::make_span(circ)};
+  typename PC::context ctx {imp::make_span(circ)};
   ASSERT_TRUE(ctx.valid());
 
   std::atomic<std::uint64_t> sum {0};
@@ -145,16 +145,20 @@ void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
 TEST(concurrent, prod_cons) {
   using namespace concur;
 
+  /// @brief 1-1
   test_concur<prod_cons<trans::unicast, relation::single, relation::single>>(1, 1, 1);
   test_concur<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 1, 1);
   test_concur<prod_cons<trans::unicast, relation::multi , relation::single>>(1, 1, 1);
   test_concur<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 1, 1);
 
+  /// @brief 8-1
   test_concur<prod_cons<trans::unicast, relation::multi , relation::single>>(8, 1, 1);
   test_concur<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 1, 1);
 
+  /// @brief 1-8
   test_concur<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 8, 1);
   test_concur<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 8, 1);
 
+  /// @brief 8-8
   test_concur<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 8, 1);
 }
\ No newline at end of file

From 44fe8ce8da92ab8b25e1fa5506a41b4c62f94caa Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Nov 2022 16:41:52 +0800
Subject: [PATCH 109/272] upd: LIBIMP_ => LIBIMP

---
 include/libconcur/concurrent.h       | 10 +++++-----
 include/libconcur/def.h              |  4 ++--
 include/libimp/byte.h                |  4 ++--
 include/libimp/def.h                 |  4 ++--
 include/libimp/generic.h             |  2 +-
 include/libimp/log.h                 |  4 ++--
 include/libimp/result.h              | 12 ++++++------
 include/libimp/span.h                |  4 ++--
 include/libimp/system.h              |  6 +++---
 include/libipc/def.h                 |  4 ++--
 include/libipc/shm.h                 |  6 +++---
 include/libpmr/allocator.h           |  4 ++--
 include/libpmr/def.h                 |  4 ++--
 src/libimp/codecvt.cpp               |  2 +-
 src/libimp/log.cpp                   |  3 +--
 src/libipc/platform/posix/shm_impl.h |  2 +-
 src/libipc/platform/win/get_sa.h     |  2 +-
 src/libipc/platform/win/mmap_impl.h  |  2 +-
 src/libipc/platform/win/shm_impl.h   |  2 +-
 src/libipc/platform/win/to_tchar.h   |  2 +-
 src/libpmr/allocator.cpp             |  8 ++++----
 src/libpmr/memory_resource.cpp       |  2 +-
 test/CMakeLists.txt                  |  6 ++++--
 test/{ => ipc}/test_ipc_shm.cpp      |  0
 24 files changed, 50 insertions(+), 49 deletions(-)
 rename test/{ => ipc}/test_ipc_shm.cpp (100%)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index f7595339..87a9d120 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -88,7 +88,7 @@ struct producer<trans::unicast, relation::single> {
   template <typename T, typename C, typename U, 
             typename = is_context<C>,
             typename = is_convertible<C, context_impl>>
-  static bool enqueue(::LIBIMP_::span<element<T>> elems, C &ctx, U &&src) noexcept {
+  static bool enqueue(::LIBIMP::span<element<T>> elems, C &ctx, U &&src) noexcept {
     auto w_idx = ctx.w_idx;
     auto w_cur = trunc_index(ctx, w_idx);
     auto &elem = elems[w_cur];
@@ -119,7 +119,7 @@ struct producer<trans::unicast, relation::multi> {
   template <typename T, typename C, typename U, 
             typename = is_context<C>,
             typename = is_convertible<C, context_impl>>
-  static bool enqueue(::LIBIMP_::span<element<T>> elems, C &ctx, U &&src) noexcept {
+  static bool enqueue(::LIBIMP::span<element<T>> elems, C &ctx, U &&src) noexcept {
     auto w_idx = ctx.w_idx.load(std::memory_order_acquire);
     for (;;) {
       auto w_cur = trunc_index(ctx, w_idx);
@@ -154,7 +154,7 @@ struct consumer<trans::unicast, relation::single> {
   template <typename T, typename C, typename U, 
             typename = is_context<C>,
             typename = is_convertible<C, context_impl>>
-  static bool dequeue(::LIBIMP_::span<element<T>> elems, C &ctx, U &des) noexcept {
+  static bool dequeue(::LIBIMP::span<element<T>> elems, C &ctx, U &des) noexcept {
     auto r_idx = ctx.r_idx;
     auto r_cur = trunc_index(ctx, r_idx);
     auto &elem = elems[r_cur];
@@ -184,7 +184,7 @@ struct consumer<trans::unicast, relation::multi> {
   template <typename T, typename C, typename U, 
             typename = is_context<C>,
             typename = is_convertible<C, context_impl>>
-  static bool dequeue(::LIBIMP_::span<element<T>> elems, C &ctx, U &des) noexcept {
+  static bool dequeue(::LIBIMP::span<element<T>> elems, C &ctx, U &des) noexcept {
     auto r_idx = ctx.r_idx.load(std::memory_order_acquire);
     for (;;) {
       auto r_cur = trunc_index(ctx, r_idx);
@@ -250,7 +250,7 @@ struct prod_cons : producer<TransModT, ProdModT>
       : circ_size(cs) {}
 
     template <typename T>
-    constexpr context(::LIBIMP_::span<element<T>> elems) noexcept
+    constexpr context(::LIBIMP::span<element<T>> elems) noexcept
       : circ_size(static_cast<index_t>(elems.size())) {}
 
     constexpr bool valid() const noexcept {
diff --git a/include/libconcur/def.h b/include/libconcur/def.h
index 83dd1bce..d5200120 100644
--- a/include/libconcur/def.h
+++ b/include/libconcur/def.h
@@ -11,8 +11,8 @@
 
 #include "libimp/detect_plat.h"
 
-#define LIBCONCUR_               concur
-#define LIBCONCUR_NAMESPACE_BEG_ namespace LIBCONCUR_ {
+#define LIBCONCUR                concur
+#define LIBCONCUR_NAMESPACE_BEG_ namespace LIBCONCUR {
 #define LIBCONCUR_NAMESPACE_END_ }
 
 LIBCONCUR_NAMESPACE_BEG_
diff --git a/include/libimp/byte.h b/include/libimp/byte.h
index dbf1f7c7..aa0c4058 100644
--- a/include/libimp/byte.h
+++ b/include/libimp/byte.h
@@ -158,12 +158,12 @@ U *byte_cast(byte const *p) noexcept {
 LIBIMP_NAMESPACE_END_
 
 template <>
-struct fmt::formatter<::LIBIMP_::byte> {
+struct fmt::formatter<::LIBIMP::byte> {
   constexpr auto parse(format_parse_context& ctx) const {
     return ctx.end();
   }
   template <typename FormatContext>
-  auto format(::LIBIMP_::byte b, FormatContext &ctx) {
+  auto format(::LIBIMP::byte b, FormatContext &ctx) {
     return format_to(ctx.out(), "{:#04x}", static_cast<std::uint8_t>(b));
   }
 };
diff --git a/include/libimp/def.h b/include/libimp/def.h
index 43480509..8fb25055 100644
--- a/include/libimp/def.h
+++ b/include/libimp/def.h
@@ -9,8 +9,8 @@
 #include <cstddef>
 #include <cstdint>
 
-#define LIBIMP_               imp
-#define LIBIMP_NAMESPACE_BEG_ namespace LIBIMP_ {
+#define LIBIMP                imp
+#define LIBIMP_NAMESPACE_BEG_ namespace LIBIMP {
 #define LIBIMP_NAMESPACE_END_ }
 
 LIBIMP_NAMESPACE_BEG_
diff --git a/include/libimp/generic.h b/include/libimp/generic.h
index 2f11b6cb..643069ac 100644
--- a/include/libimp/generic.h
+++ b/include/libimp/generic.h
@@ -1,7 +1,7 @@
 /**
  * @file libimp/generic.h
  * @author mutouyun (orz@orzz.org)
- * @brief Tools for generic programming
+ * @brief Tools for generic programming.
  * @date 2022-03-01
  */
 #pragma once
diff --git a/include/libimp/log.h b/include/libimp/log.h
index df6bc1b1..dbb8555d 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -1,7 +1,7 @@
 /**
  * @file libimp/log.h
  * @author mutouyun (orz@orzz.org)
- * @brief Simple log output component
+ * @brief Simple log output component.
  * @date 2022-05-22
  */
 #pragma once
@@ -198,4 +198,4 @@ class grip {
 } // namespace log
 LIBIMP_NAMESPACE_END_
 
-#define LIBIMP_LOG_(...) ::LIBIMP_::log::grip log {__func__, __VA_ARGS__}
\ No newline at end of file
+#define LIBIMP_LOG_(...) ::LIBIMP::log::grip log {__func__, __VA_ARGS__}
\ No newline at end of file
diff --git a/include/libimp/result.h b/include/libimp/result.h
index d4c3bb2f..6037b301 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -160,22 +160,22 @@ class result<T, DefTraits, std::enable_if_t<std::is_pointer<T>::value>> {
 LIBIMP_NAMESPACE_END_
 
 template <typename T, typename D>
-struct fmt::formatter<::LIBIMP_::result<T, D>> {
+struct fmt::formatter<::LIBIMP::result<T, D>> {
   constexpr auto parse(format_parse_context& ctx) const {
     return ctx.end();
   }
   template <typename FormatContext>
-  auto format(::LIBIMP_::result<T, D> r, FormatContext &ctx) {
-    return format_to(::LIBIMP_::result<T, D>::default_traits_t::format(r, 
+  auto format(::LIBIMP::result<T, D> r, FormatContext &ctx) {
+    return format_to(::LIBIMP::result<T, D>::default_traits_t::format(r, 
            format_to(ctx.out(), "[{}, value = ", r ? "succ" : "fail")), "]");
   }
 };
 
 template <>
-struct fmt::formatter<::LIBIMP_::result_code>
-          : formatter<::LIBIMP_::result<::LIBIMP_::result_type>> {
+struct fmt::formatter<::LIBIMP::result_code>
+          : formatter<::LIBIMP::result<::LIBIMP::result_type>> {
   template <typename FormatContext>
-  auto format(::LIBIMP_::result_code r, FormatContext &ctx) {
+  auto format(::LIBIMP::result_code r, FormatContext &ctx) {
     return format_to(ctx.out(), "[{}, value = {}]", (r ? "succ" : "fail"), *r);
   }
 };
diff --git a/include/libimp/span.h b/include/libimp/span.h
index 2511d290..1e613267 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -281,12 +281,12 @@ inline auto make_span(std::string const &str) noexcept -> span<char const> {
 LIBIMP_NAMESPACE_END_
 
 template <typename T>
-struct fmt::formatter<::LIBIMP_::span<T>> {
+struct fmt::formatter<::LIBIMP::span<T>> {
   constexpr auto parse(format_parse_context& ctx) const {
     return ctx.end();
   }
   template <typename FormatContext>
-  auto format(::LIBIMP_::span<T> s, FormatContext &ctx) {
+  auto format(::LIBIMP::span<T> s, FormatContext &ctx) {
     if (s.empty()) {
       return format_to(ctx.out(), "");
     }
diff --git a/include/libimp/system.h b/include/libimp/system.h
index dbff5997..435d2579 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -67,10 +67,10 @@ LIBIMP_EXPORT result<std::int64_t> conf(info) noexcept;
 LIBIMP_NAMESPACE_END_
 
 template <>
-struct fmt::formatter<::LIBIMP_::sys::error>
+struct fmt::formatter<::LIBIMP::sys::error>
           : formatter<std::string> {
   template <typename FormatContext>
-  auto format(::LIBIMP_::sys::error r, FormatContext &ctx) {
-    return format_to(ctx.out(), ::LIBIMP_::sys::error_msg(r.code()));
+  auto format(::LIBIMP::sys::error r, FormatContext &ctx) {
+    return format_to(ctx.out(), ::LIBIMP::sys::error_msg(r.code()));
   }
 };
diff --git a/include/libipc/def.h b/include/libipc/def.h
index 0ad70853..3b121d16 100755
--- a/include/libipc/def.h
+++ b/include/libipc/def.h
@@ -9,8 +9,8 @@
 #include <cstddef>
 #include <cstdint>
 
-#define LIBIPC_               ipc
-#define LIBIPC_NAMESPACE_BEG_ namespace LIBIPC_ {
+#define LIBIPC                ipc
+#define LIBIPC_NAMESPACE_BEG_ namespace LIBIPC {
 #define LIBIPC_NAMESPACE_END_ }
 
 LIBIPC_NAMESPACE_BEG_
diff --git a/include/libipc/shm.h b/include/libipc/shm.h
index 607cef00..ba87e339 100644
--- a/include/libipc/shm.h
+++ b/include/libipc/shm.h
@@ -20,12 +20,12 @@ struct shm_handle;
 using shm_t = shm_handle *;
 
 /// @brief Create a new shared memory handle with a name of the shared memory file.
-LIBIMP_EXPORT ::LIBIMP_::result<shm_t> shm_open(std::string name, 
+LIBIMP_EXPORT ::LIBIMP::result<shm_t> shm_open(std::string name, 
                                                 std::size_t size = 0,
                                                 mode::type = mode::create | mode::open) noexcept;
 
 /// @brief Close the shared memory handle.
-LIBIMP_EXPORT ::LIBIMP_::result_code shm_close(shm_t) noexcept;
+LIBIMP_EXPORT ::LIBIMP::result_code shm_close(shm_t) noexcept;
 
 /// @brief Gets a memory pointer based on the shared memory handle.
 /// @return nullptr on failure.
@@ -37,7 +37,7 @@ LIBIMP_EXPORT std::size_t shm_size(shm_t) noexcept;
 
 /// @brief Sets the memory size based on the shared memory handle.
 /// @remark [TBD]
-LIBIMP_EXPORT ::LIBIMP_::result_code shm_size(shm_t, std::size_t) noexcept;
+LIBIMP_EXPORT ::LIBIMP::result_code shm_size(shm_t, std::size_t) noexcept;
 
 /// @brief Gets the name of the shared memory file based on the shared memory handle.
 /// @return empty string on failure.
diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index a7019e23..c6f58754 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -85,7 +85,7 @@ class LIBIMP_EXPORT allocator {
   };
 
   using void_holder_type = holder_memory_resource<void>;
-  alignas(void_holder_type) std::array<::LIBIMP_::byte, sizeof(void_holder_type)> holder_;
+  alignas(void_holder_type) std::array<::LIBIMP::byte, sizeof(void_holder_type)> holder_;
 
   holder_base &      get_holder() noexcept;
   holder_base const &get_holder() const noexcept;
@@ -105,7 +105,7 @@ class LIBIMP_EXPORT allocator {
   template <typename T, typename = is_memory_resource<T>>
   allocator(T *p_mr) : allocator() {
     if (p_mr == nullptr) return;
-    ::LIBIMP_::construct<holder_memory_resource<T>>(holder_.data(), p_mr);
+    ::LIBIMP::construct<holder_memory_resource<T>>(holder_.data(), p_mr);
   }
 
   void swap(allocator &other) noexcept;
diff --git a/include/libpmr/def.h b/include/libpmr/def.h
index adb9544b..2b3ef7e3 100644
--- a/include/libpmr/def.h
+++ b/include/libpmr/def.h
@@ -6,8 +6,8 @@
  */
 #pragma once
 
-#define LIBPMR_               pmr
-#define LIBPMR_NAMESPACE_BEG_ namespace LIBPMR_ {
+#define LIBPMR                pmr
+#define LIBPMR_NAMESPACE_BEG_ namespace LIBPMR {
 #define LIBPMR_NAMESPACE_END_ }
 
 LIBPMR_NAMESPACE_BEG_
diff --git a/src/libimp/codecvt.cpp b/src/libimp/codecvt.cpp
index 96ee8ca3..91a0cfd4 100644
--- a/src/libimp/codecvt.cpp
+++ b/src/libimp/codecvt.cpp
@@ -1,10 +1,10 @@
+#include "libimp/codecvt.h"
 
 #include <algorithm>
 #include <type_traits>
 #include <cstring>
 #include <cstdint>
 
-#include "libimp/codecvt.h"
 #include "libimp/log.h"
 #include "libimp/detect_plat.h"
 
diff --git a/src/libimp/log.cpp b/src/libimp/log.cpp
index c12043e5..4bfc2f0c 100644
--- a/src/libimp/log.cpp
+++ b/src/libimp/log.cpp
@@ -1,11 +1,10 @@
+#include "libimp/log.h"
 
 #include <utility>
 #include <cstdio>
 
 #include "fmt/chrono.h"
 
-#include "libimp/log.h"
-
 LIBIMP_NAMESPACE_BEG_
 namespace log {
 
diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
index 76732005..366f53ba 100644
--- a/src/libipc/platform/posix/shm_impl.h
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -23,7 +23,7 @@
 #include "def.h"
 
 LIBIPC_NAMESPACE_BEG_
-using namespace ::LIBIMP_;
+using namespace ::LIBIMP;
 
 struct shm_handle {
   std::string file;
diff --git a/src/libipc/platform/win/get_sa.h b/src/libipc/platform/win/get_sa.h
index 65c2edd5..05887ee6 100644
--- a/src/libipc/platform/win/get_sa.h
+++ b/src/libipc/platform/win/get_sa.h
@@ -27,7 +27,7 @@ inline LPSECURITY_ATTRIBUTES get_sa() {
     bool succ_ = false;
 
     initiator() {
-      using namespace ::LIBIMP_;
+      using namespace ::LIBIMP;
       log::grip log {"get_sa"};
       if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
         log.error("failed: InitializeSecurityDescriptor(SECURITY_DESCRIPTOR_REVISION). error = {}", sys::error());
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index f2cf9296..e7392ce1 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -18,7 +18,7 @@
 #include "to_tchar.h"
 
 LIBIPC_NAMESPACE_BEG_
-using namespace ::LIBIMP_;
+using namespace ::LIBIMP;
 
 struct shm_handle {
   std::string file;
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index 56059f50..d6019084 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -15,7 +15,7 @@
 #include "mmap_impl.h"
 
 LIBIPC_NAMESPACE_BEG_
-using namespace ::LIBIMP_;
+using namespace ::LIBIMP;
 
 result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
   LIBIMP_LOG_();
diff --git a/src/libipc/platform/win/to_tchar.h b/src/libipc/platform/win/to_tchar.h
index 4f1d9425..a93c3b5c 100644
--- a/src/libipc/platform/win/to_tchar.h
+++ b/src/libipc/platform/win/to_tchar.h
@@ -19,7 +19,7 @@ using tstring = std::basic_string<TCHAR>;
 
 inline tstring to_tstring(std::string const &str) {
   tstring des;
-  ::LIBIMP_::cvt_sstr(str, des);
+  ::LIBIMP::cvt_sstr(str, des);
   return des;
 }
 
diff --git a/src/libpmr/allocator.cpp b/src/libpmr/allocator.cpp
index 5254b0be..c83147e5 100644
--- a/src/libpmr/allocator.cpp
+++ b/src/libpmr/allocator.cpp
@@ -14,22 +14,22 @@ allocator::holder_base const &allocator::get_holder() const noexcept {
 }
 
 allocator::allocator() noexcept {
-  ::LIBIMP_::construct<holder_null>(holder_.data());
+  ::LIBIMP::construct<holder_null>(holder_.data());
 }
 
 allocator::~allocator() noexcept {
-  ::LIBIMP_::destroy(&get_holder());
+  ::LIBIMP::destroy(&get_holder());
 }
 
 allocator::allocator(allocator &&other) noexcept
   : allocator(other) /*copy*/ {
-  ::LIBIMP_::construct<holder_null>(other.holder_.data());
+  ::LIBIMP::construct<holder_null>(other.holder_.data());
 }
 
 allocator &allocator::operator=(allocator &&other) & noexcept {
   if (this == &other) return *this;
   this->holder_ = other.holder_;
-  ::LIBIMP_::construct<holder_null>(other.holder_.data());
+  ::LIBIMP::construct<holder_null>(other.holder_.data());
   return *this;
 }
 
diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
index 98f8a826..7824e5dd 100644
--- a/src/libpmr/memory_resource.cpp
+++ b/src/libpmr/memory_resource.cpp
@@ -13,7 +13,7 @@ namespace {
 /**
  * @brief Check that bytes is not 0 and that the alignment is a power of two.
  */
-bool verify_args(::LIBIMP_::log::grip &log, std::size_t bytes, std::size_t alignment) noexcept {
+bool verify_args(::LIBIMP::log::grip &log, std::size_t bytes, std::size_t alignment) noexcept {
   if (bytes == 0) {
     return false;
   }
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index ee001dd2..d7b27792 100755
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -29,11 +29,13 @@ file(GLOB SRC_FILES
   ${LIBIPC_PROJECT_DIR}/test/imp/*.cpp
   ${LIBIPC_PROJECT_DIR}/test/pmr/*.cpp
   ${LIBIPC_PROJECT_DIR}/test/concur/*.cpp
-  ${LIBIPC_PROJECT_DIR}/test/*.cpp)
+  ${LIBIPC_PROJECT_DIR}/test/ipc/*.cpp)
 
 file(GLOB HEAD_FILES
   ${LIBIPC_PROJECT_DIR}/test/*.h)
 
 add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
 
-target_link_libraries(${PROJECT_NAME} gtest_main imp pmr ipc)
+target_link_libraries(${PROJECT_NAME} 
+  gtest_main 
+  imp pmr ipc)
diff --git a/test/test_ipc_shm.cpp b/test/ipc/test_ipc_shm.cpp
similarity index 100%
rename from test/test_ipc_shm.cpp
rename to test/ipc/test_ipc_shm.cpp

From bbbb03408df9d54e1d4403484c89b5478cfa85f8 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Nov 2022 21:04:25 +0800
Subject: [PATCH 110/272] add: [imp] fmt

---
 include/libimp/fmt.h      |  95 +++++++++++++++
 src/libimp/fmt.cpp        | 235 ++++++++++++++++++++++++++++++++++++++
 test/imp/test_imp_fmt.cpp |  87 ++++++++++++++
 3 files changed, 417 insertions(+)
 create mode 100644 include/libimp/fmt.h
 create mode 100644 src/libimp/fmt.cpp
 create mode 100644 test/imp/test_imp_fmt.cpp

diff --git a/include/libimp/fmt.h b/include/libimp/fmt.h
new file mode 100644
index 00000000..99069825
--- /dev/null
+++ b/include/libimp/fmt.h
@@ -0,0 +1,95 @@
+/**
+ * @file libimp/fmt.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief String formatting.
+ * @date 2022-11-26
+ */
+#pragma once
+
+#include <string>
+#include <utility>
+#include <type_traits>
+#include <chrono>   // std::chrono::time_point
+#include <cstddef>
+#include <ctime>    // std::tm
+
+#include "libimp/def.h"
+#include "libimp/span.h"
+#include "libimp/detect_plat.h"
+#include "libimp/export.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+template <typename T>
+struct fmt_ref {
+  span<char const> fstr;
+  T param;
+};
+
+template <std::size_t N>
+auto spec(char const (&fstr)[N]) noexcept {
+  return [&fstr](auto &&arg) noexcept {
+    using arg_t = decltype(arg);
+    return fmt_ref<arg_t> {{fstr}, static_cast<arg_t>(arg)};
+  };
+}
+
+template <typename... A>
+std::string fmt(A &&...args) {
+  std::string joined;
+  LIBIMP_UNUSED auto unfold = {
+    joined.append(to_string(std::forward<A>(args)))...
+  };
+  return joined;
+}
+
+/// @brief Return the string directly.
+LIBIMP_EXPORT std::string const &to_string(std::string const &a) noexcept;
+LIBIMP_EXPORT std::string to_string(std::string const &a, span<char const> fstr) noexcept;
+
+/// @brief Character to string conversion.
+/// @return an empty string if the conversion fails
+LIBIMP_EXPORT std::string to_string(char a) noexcept;
+LIBIMP_EXPORT std::string to_string(wchar_t a) noexcept;
+LIBIMP_EXPORT std::string to_string(char16_t a) noexcept;
+LIBIMP_EXPORT std::string to_string(char32_t a) noexcept;
+#if defined(LIBIMP_CPP_20)
+LIBIMP_EXPORT std::string to_string(char8_t a) noexcept;
+#endif // defined(LIBIMP_CPP_20)
+
+/// @brief Conversion of numeric types to strings.
+/// @return an empty string if the conversion fails
+LIBIMP_EXPORT std::string to_string(signed char a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(unsigned char a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(signed short a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(unsigned short a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(signed int a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(unsigned int a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(signed long a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(unsigned long a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(signed long long a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(unsigned long long a, span<char const> fstr = {}) noexcept;
+
+/// @brief Conversion of floating point type to strings.
+/// @return an empty string if the conversion fails
+LIBIMP_EXPORT std::string to_string(float a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(double a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(long double a, span<char const> fstr = {}) noexcept;
+
+/// @brief Pointer.
+LIBIMP_EXPORT std::string to_string(std::nullptr_t) noexcept;
+template <typename T,
+          typename = std::enable_if_t<std::is_same<T, void>::value>>
+LIBIMP_EXPORT std::string to_string(T *a) noexcept;
+
+/// @brief Date and time.
+LIBIMP_EXPORT std::string to_string(std::tm const &a, span<char const> fstr = {}) noexcept;
+namespace detail {
+LIBIMP_EXPORT std::string time_to_string(std::time_t tt, span<char const> fstr) noexcept;
+} // namespace detail
+template <class Clock, class Duration>
+LIBIMP_EXPORT std::string to_string(std::chrono::time_point<Clock, Duration> const &a, span<char const> fstr = {}) noexcept {
+  return detail::time_to_string(std::chrono::system_clock::to_time_t(a), fstr);
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
new file mode 100644
index 00000000..f9da2e10
--- /dev/null
+++ b/src/libimp/fmt.cpp
@@ -0,0 +1,235 @@
+#define _CRT_SECURE_NO_WARNINGS
+#include "libimp/fmt.h"
+
+#include <cstdio>   // std::snprintf
+#include <iomanip>  // std::put_time
+#include <sstream>  // std::ostringstream
+
+#include "libimp/codecvt.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * @brief Format conversions helpers.
+ * @see http://personal.ee.surrey.ac.uk/Personal/R.Bowden/C/printf.html
+ *      https://en.cppreference.com/w/cpp/io/c/fprintf
+ */
+namespace {
+
+span<char const> normalize(span<char const> a) {
+  if (a.empty()) return {};
+  return a.first(a.size() - (a.back() == '\0' ? 1 : 0));
+}
+
+std::string as_string(span<char const> a) {
+  if (a.empty()) return {};
+  a = normalize(a);
+  return std::string(a.data(), a.size());
+}
+
+std::string fmt_of(span<char const> fstr, span<char const> s) {
+  return '%' + as_string(fstr) + as_string(s);
+}
+
+std::string fmt_of_unsigned(span<char const> fstr, span<char const> l) {
+  if (fstr.empty()) {
+    return fmt_of(l, "u");
+  }
+  fstr = normalize(fstr);
+  switch (fstr.back()) {
+    case 'o':
+    case 'x':
+    case 'X':
+    case 'u': return fmt_of(fstr.first(fstr.size() - 1), l) + fstr.back();
+    default : return fmt_of(fstr, l) + 'u';
+  }
+}
+
+std::string fmt_of_signed(span<char const> fstr, span<char const> l) {
+  if (fstr.empty()) {
+    return fmt_of(l, "d");
+  }
+  fstr = normalize(fstr);
+  switch (fstr.back()) {
+    case 'o':
+    case 'x':
+    case 'X':
+    case 'u': return fmt_of_unsigned(fstr, l);
+    default : return fmt_of(fstr, l) + 'd';
+  }
+}
+
+std::string fmt_of_float(span<char const> fstr, span<char const> l) {
+  if (fstr.empty()) {
+    return fmt_of(l, "f");
+  }
+  fstr = normalize(fstr);
+  switch (fstr.back()) {
+    case 'e':
+    case 'E':
+    case 'g':
+    case 'G': return fmt_of(fstr.first(fstr.size() - 1), l) + fstr.back();
+    default : return fmt_of(fstr, l) + 'f';
+  }
+}
+
+template <typename A /*a fundamental or pointer type*/>
+std::string sprintf(std::string const &sfmt, A a) {
+  auto sz = std::snprintf(nullptr, 0, sfmt.c_str(), a);
+  if (sz <= 0) return {};
+  std::string des;
+  des.resize(sz + 1);
+  if (std::snprintf(&des[0], des.size(), sfmt.c_str(), a) < 0) {
+    return {};
+  }
+  des.pop_back(); // remove the terminated null character
+  return des;
+}
+
+template <typename F /*a function pointer*/, 
+          typename A /*a fundamental or pointer type*/>
+std::string sprintf(F fop, span<char const> fstr, span<char const> s, A a) noexcept {
+  LIBIMP_TRY {
+    return ::LIBIMP::sprintf(fop(fstr, s), a);
+  } LIBIMP_CATCH(...) {
+    return {};
+  }
+}
+
+} // namespace
+
+std::string const &to_string(std::string const &a) noexcept {
+  return a;
+}
+
+std::string to_string(std::string const &a, span<char const> fstr) noexcept {
+  if (a.empty()) return {};
+  return ::LIBIMP::sprintf(fmt_of, fstr, "s", a.c_str());
+}
+
+std::string to_string(char a) noexcept {
+  return {a};
+}
+
+std::string to_string(wchar_t a) noexcept {
+  LIBIMP_TRY {
+    std::string des;
+    cvt_sstr(std::wstring{a}, des);
+    return des;
+  } LIBIMP_CATCH(...) {
+    return {};
+  }
+}
+
+std::string to_string(char16_t a) noexcept {
+  LIBIMP_TRY {
+    std::string des;
+    cvt_sstr(std::u16string{a}, des);
+    return des;
+  } LIBIMP_CATCH(...) {
+    return {};
+  }
+}
+
+std::string to_string(char32_t a) noexcept {
+  LIBIMP_TRY {
+    std::string des;
+    cvt_sstr(std::u32string{a}, des);
+    return des;
+  } LIBIMP_CATCH(...) {
+    return {};
+  }
+}
+
+#if defined(LIBIMP_CPP_20)
+std::string to_string(char8_t a) noexcept {
+  return to_string((char)a);
+}
+#endif // defined(LIBIMP_CPP_20)
+
+std::string to_string(signed char a, span<char const> fstr) noexcept {
+  return to_string((int)a, fstr);
+}
+
+std::string to_string(unsigned char a, span<char const> fstr) noexcept {
+  return to_string((unsigned)a, fstr);
+}
+
+std::string to_string(signed short a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(fmt_of_signed, fstr, "h", a);
+}
+
+std::string to_string(unsigned short a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(fmt_of_unsigned, fstr, "h", a);
+}
+
+std::string to_string(signed int a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(fmt_of_signed, fstr, "", a);
+}
+
+std::string to_string(unsigned int a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(fmt_of_unsigned, fstr, "", a);
+}
+
+std::string to_string(signed long a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(fmt_of_signed, fstr, "l", a);
+}
+
+std::string to_string(unsigned long a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(fmt_of_unsigned, fstr, "l", a);
+}
+
+std::string to_string(signed long long a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(fmt_of_signed, fstr, "ll", a);
+}
+
+std::string to_string(unsigned long long a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(fmt_of_unsigned, fstr, "ll", a);
+}
+
+std::string to_string(float a, span<char const> fstr) noexcept {
+  return to_string((double)a, fstr);
+}
+
+std::string to_string(double a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(fmt_of_float, fstr, "", a);
+}
+
+std::string to_string(long double a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(fmt_of_float, fstr, "L", a);
+}
+
+std::string to_string(std::nullptr_t) noexcept {
+  return "null";
+}
+
+template <>
+std::string to_string<void, void>(void *a) noexcept {
+  if (a == nullptr) {
+    return to_string(nullptr);
+  }
+  return ::LIBIMP::sprintf(fmt_of, "", "p", a);
+}
+
+std::string to_string(std::tm const &a, span<char const> fstr) noexcept {
+  if (fstr.empty()) {
+    fstr = "%Y-%m-%d %H:%M:%S";
+  }
+  LIBIMP_TRY {
+    std::ostringstream ss;
+    ss << std::put_time(&a, as_string(fstr).c_str());
+    return ss.str();
+  } LIBIMP_CATCH(...) {
+    return {};
+  }
+}
+
+namespace detail {
+
+std::string time_to_string(std::time_t tt, span<char const> fstr) noexcept {
+  return to_string(*std::localtime(&tt), fstr);
+}
+
+} // namespace detail
+
+LIBIMP_NAMESPACE_END_
diff --git a/test/imp/test_imp_fmt.cpp b/test/imp/test_imp_fmt.cpp
new file mode 100644
index 00000000..5ecb9061
--- /dev/null
+++ b/test/imp/test_imp_fmt.cpp
@@ -0,0 +1,87 @@
+#define _CRT_SECURE_NO_WARNINGS
+#include <iostream>
+
+#include "gtest/gtest.h"
+
+#include "libimp/fmt.h"
+
+TEST(fmt, operator) {
+  auto a = imp::spec("hello")(123);
+  EXPECT_STREQ(a.fstr.data(), "hello");
+  EXPECT_EQ(a.param , 123);
+
+  auto b = imp::spec("hello")("world");
+  EXPECT_STREQ(b.fstr.data(), "hello");
+  EXPECT_STREQ(b.param , "world");
+}
+
+TEST(fmt, to_string) {
+  /// @brief string
+  EXPECT_EQ(imp::to_string(""), "");
+  EXPECT_EQ(imp::to_string("%what%"), "%what%");
+  EXPECT_EQ(imp::to_string("%what%", "10") , "    %what%");
+  EXPECT_EQ(imp::to_string("%what%", "-10"), "%what%    ");
+
+  /// @brief character
+  EXPECT_EQ(imp::to_string('A'), "A");
+  EXPECT_EQ(imp::to_string(L'A'), "A");
+  EXPECT_EQ(imp::to_string(u'A'), "A");
+  EXPECT_EQ(imp::to_string(U'A'), "A");
+
+  /// @brief numeric
+  EXPECT_EQ(imp::to_string((signed char)123), "123");
+  EXPECT_EQ(imp::to_string((signed char)-321), "-65");
+  EXPECT_EQ(imp::to_string((unsigned char)123), "123");
+  EXPECT_EQ(imp::to_string((unsigned char)321), "65");
+  EXPECT_EQ(imp::to_string((short)123), "123");
+  EXPECT_EQ(imp::to_string((short)-321), "-321");
+  EXPECT_EQ(imp::to_string((unsigned short)123), "123");
+  EXPECT_EQ(imp::to_string((unsigned short)321), "321");
+  EXPECT_EQ(imp::to_string((short)123123), "-7949");
+  EXPECT_EQ(imp::to_string((short)-321321), "6359");
+  EXPECT_EQ(imp::to_string((unsigned short)123123), "57587");
+  EXPECT_EQ(imp::to_string((unsigned short)321321), "59177");
+  EXPECT_EQ(imp::to_string(123123), "123123");
+  EXPECT_EQ(imp::to_string(-321321), "-321321");
+  EXPECT_EQ(imp::to_string(123123u), "123123");
+  EXPECT_EQ(imp::to_string(321321u), "321321");
+  EXPECT_EQ(imp::to_string(123123ll), "123123");
+  EXPECT_EQ(imp::to_string(-321321ll), "-321321");
+  EXPECT_EQ(imp::to_string(123123ull), "123123");
+  EXPECT_EQ(imp::to_string(321321ull), "321321");
+  EXPECT_EQ(imp::to_string(123123, "x"), "1e0f3");
+  EXPECT_EQ(imp::to_string(123123u, "x"), "1e0f3");
+  EXPECT_EQ(imp::to_string(123123123123ll, "X"), "1CAAB5C3B3");
+  EXPECT_EQ(imp::to_string(123123123123ull, "X"), "1CAAB5C3B3");
+
+  /// @brief floating point
+  EXPECT_EQ(imp::to_string(123.123f, ".3"), "123.123");
+  EXPECT_EQ(imp::to_string(123.123, "010.5"), "0123.12300");
+  EXPECT_EQ(imp::to_string(123.123l, "010.6"), "123.123000");
+  EXPECT_EQ(imp::to_string(1.5, "e"), "1.500000e+00");
+  EXPECT_EQ(imp::to_string(1.5, "E"), "1.500000E+00");
+  double r = 0.0;
+  std::cout << imp::to_string(0.0/r) << "\n";
+  std::cout << imp::to_string(1.0/r) << "\n";
+  SUCCEED();
+
+  /// @brief pointer
+  EXPECT_EQ(imp::to_string(nullptr), "null");
+  int *p = (int *)0x0f013a04;
+  std::cout << imp::to_string((void *)p) << "\n";
+  SUCCEED();
+
+  /// @brief date and time
+  auto tp = std::chrono::system_clock::now();
+  auto tt = std::chrono::system_clock::to_time_t(tp);
+  auto tm = *std::localtime(&tt);
+  std::cout << imp::to_string(tm) << "\n";
+  EXPECT_EQ(imp::to_string(tm), imp::to_string(tp));
+  SUCCEED();
+}
+
+TEST(fmt, fmt) {
+  auto s = imp::fmt("hello", " ", "world", ".");
+  EXPECT_EQ(s, "hello world.");
+  std::cout << imp::fmt('[', std::chrono::system_clock::now(), "] ", s) << "\n";
+}
\ No newline at end of file

From 31e4c4d5e465f7dc8ea0bf1d18faedcf56a41347 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Nov 2022 21:45:52 +0800
Subject: [PATCH 111/272] add: [imp] tag_invoke for fmt

---
 include/libimp/fmt.h     | 31 +++++++++++++++++++++++++++++--
 include/libimp/generic.h | 23 +++++++++++++++++++++++
 include/libimp/log.h     |  9 +++++++++
 src/libimp/fmt.cpp       |  6 +++++-
 4 files changed, 66 insertions(+), 3 deletions(-)

diff --git a/include/libimp/fmt.h b/include/libimp/fmt.h
index 99069825..c35c68f7 100644
--- a/include/libimp/fmt.h
+++ b/include/libimp/fmt.h
@@ -17,6 +17,7 @@
 #include "libimp/span.h"
 #include "libimp/detect_plat.h"
 #include "libimp/export.h"
+#include "libimp/generic.h"
 
 LIBIMP_NAMESPACE_BEG_
 
@@ -34,17 +35,31 @@ auto spec(char const (&fstr)[N]) noexcept {
   };
 }
 
+namespace detail {
+
+struct fmt_to_string_t {
+  template <typename T>
+  std::string operator()(T &&arg) const {
+    return ::LIBIMP::tag_invoke(fmt_to_string_t{}, std::forward<T>(arg));
+  }
+};
+
+} // namespace detail
+
+constexpr detail::fmt_to_string_t fmt_to_string {};
+
 template <typename... A>
 std::string fmt(A &&...args) {
   std::string joined;
   LIBIMP_UNUSED auto unfold = {
-    joined.append(to_string(std::forward<A>(args)))...
+    joined.append(fmt_to_string(std::forward<A>(args)))...
   };
   return joined;
 }
 
 /// @brief Return the string directly.
-LIBIMP_EXPORT std::string const &to_string(std::string const &a) noexcept;
+LIBIMP_EXPORT std::string to_string(std::string const &a) noexcept;
+LIBIMP_EXPORT std::string to_string(std::string &&a) noexcept;
 LIBIMP_EXPORT std::string to_string(std::string const &a, span<char const> fstr) noexcept;
 
 /// @brief Character to string conversion.
@@ -92,4 +107,16 @@ LIBIMP_EXPORT std::string to_string(std::chrono::time_point<Clock, Duration> con
   return detail::time_to_string(std::chrono::system_clock::to_time_t(a), fstr);
 }
 
+/**
+ * @brief Predefined fmt_to_string method
+ */
+namespace detail {
+
+template <typename T>
+auto tag_invoke(fmt_to_string_t, T &&arg) noexcept
+  -> decltype(::LIBIMP::to_string(std::forward<T>(arg))) {
+  return ::LIBIMP::to_string(std::forward<T>(arg));
+}
+
+} // namespace detail
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/generic.h b/include/libimp/generic.h
index 643069ac..80932ac0 100644
--- a/include/libimp/generic.h
+++ b/include/libimp/generic.h
@@ -6,6 +6,8 @@
  */
 #pragma once
 
+#include <utility>
+
 #include "libimp/def.h"
 
 LIBIMP_NAMESPACE_BEG_
@@ -17,4 +19,25 @@ LIBIMP_NAMESPACE_BEG_
 template <typename...>
 using void_t = void;
 
+/**
+ * @brief A general pattern for supporting customisable functions
+ * @see https://www.open-std.org/jtc1/sc22/WG21/docs/papers/2019/p1895r0.pdf
+*/
+namespace detail {
+
+void tag_invoke();
+
+struct tag_invoke_t {
+  template <typename T, typename... A>
+  constexpr auto operator()(T tag, A &&...args) const
+    noexcept(noexcept(tag_invoke(std::forward<T>(tag), std::forward<A>(args)...)))
+          -> decltype(tag_invoke(std::forward<T>(tag), std::forward<A>(args)...)) {
+    return tag_invoke(std::forward<T>(tag), std::forward<A>(args)...);
+  }
+};
+
+} // namespace detail
+
+constexpr detail::tag_invoke_t tag_invoke {};
+
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/log.h b/include/libimp/log.h
index dbb8555d..df9b794f 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -17,6 +17,7 @@
 #include "libimp/detect_plat.h"
 #include "libimp/export.h"
 #include "libimp/enum_cast.h"
+#include "libimp/fmt.h"
 
 LIBIMP_NAMESPACE_BEG_
 namespace log {
@@ -39,6 +40,14 @@ struct context {
 
 LIBIMP_EXPORT std::string to_string(context &&) noexcept;
 
+/**
+ * @brief Custom defined fmt_to_string method for imp::fmt
+ */
+template <typename T>
+std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), context &&arg) noexcept {
+  return ::LIBIMP::log::to_string(std::move(arg));
+}
+
 } // namespace log
 
 namespace detail_log {
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index f9da2e10..9db9e139 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -98,10 +98,14 @@ std::string sprintf(F fop, span<char const> fstr, span<char const> s, A a) noexc
 
 } // namespace
 
-std::string const &to_string(std::string const &a) noexcept {
+std::string to_string(std::string const &a) noexcept {
   return a;
 }
 
+std::string to_string(std::string &&a) noexcept {
+  return std::move(a);
+}
+
 std::string to_string(std::string const &a, span<char const> fstr) noexcept {
   if (a.empty()) return {};
   return ::LIBIMP::sprintf(fmt_of, fstr, "s", a.c_str());

From f43606639cd270b6c624ce0ebc6a87df3e19ecae Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Nov 2022 21:51:07 +0800
Subject: [PATCH 112/272] fix: ut

---
 test/imp/test_imp_fmt.cpp | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/test/imp/test_imp_fmt.cpp b/test/imp/test_imp_fmt.cpp
index 5ecb9061..234dfc4c 100644
--- a/test/imp/test_imp_fmt.cpp
+++ b/test/imp/test_imp_fmt.cpp
@@ -6,13 +6,10 @@
 #include "libimp/fmt.h"
 
 TEST(fmt, operator) {
-  auto a = imp::spec("hello")(123);
-  EXPECT_STREQ(a.fstr.data(), "hello");
-  EXPECT_EQ(a.param , 123);
-
-  auto b = imp::spec("hello")("world");
-  EXPECT_STREQ(b.fstr.data(), "hello");
-  EXPECT_STREQ(b.param , "world");
+  EXPECT_STREQ(imp::spec("hello")(123).fstr.data(), "hello");
+  EXPECT_EQ(imp::spec("hello")(123).param , 123);
+  EXPECT_STREQ(imp::spec("hello")("world").fstr.data(), "hello");
+  EXPECT_STREQ(imp::spec("hello")("world").param , "world");
 }
 
 TEST(fmt, to_string) {

From 89ba7c762fc3c6f37f96cba771aa27010350a142 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Nov 2022 22:58:06 +0800
Subject: [PATCH 113/272] upd: replace {fmt} with imp::fmt

---
 benchmark/CMakeLists.txt               |  4 ++-
 include/libconcur/element.h            |  2 +-
 include/libimp/fmt.h                   |  8 ++++-
 include/libimp/log.h                   | 42 ++++++--------------------
 include/libimp/result.h                | 31 ++++++++++++++++---
 include/libimp/system.h                |  8 +++++
 src/libimp/fmt.cpp                     |  2 +-
 src/libimp/log.cpp                     |  4 +--
 src/libimp/platform/gnuc/demangle.h    |  2 +-
 src/libimp/platform/posix/system.h     |  9 +++---
 src/libimp/platform/win/codecvt.h      |  8 ++---
 src/libimp/platform/win/system.h       |  4 +--
 src/libimp/system.cpp                  |  4 +--
 src/libipc/platform/posix/shm_impl.h   | 15 ++++-----
 src/libipc/platform/win/get_sa.h       |  4 +--
 src/libipc/platform/win/mmap_impl.h    | 16 +++++-----
 src/libipc/platform/win/shm_impl.h     |  6 ++--
 src/libpmr/memory_resource.cpp         |  7 +++--
 test/concur/test_concur_concurrent.cpp |  4 +--
 test/imp/test_imp_result.cpp           |  8 ++---
 20 files changed, 101 insertions(+), 87 deletions(-)

diff --git a/benchmark/CMakeLists.txt b/benchmark/CMakeLists.txt
index 0828b56f..5d04019e 100644
--- a/benchmark/CMakeLists.txt
+++ b/benchmark/CMakeLists.txt
@@ -29,4 +29,6 @@ file(GLOB HEAD_FILES ${LIBIPC_PROJECT_DIR}/benchmark/*.h)
 
 add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
 
-target_link_libraries(${PROJECT_NAME} benchmark_main imp ipc)
+target_link_libraries(${PROJECT_NAME}
+  benchmark_main fmt
+  imp ipc)
diff --git a/include/libconcur/element.h b/include/libconcur/element.h
index b45dd284..f53381b3 100644
--- a/include/libconcur/element.h
+++ b/include/libconcur/element.h
@@ -54,7 +54,7 @@ class element {
     LIBIMP_TRY {
       data_ = std::forward<U>(src);
     } LIBIMP_CATCH(std::exception const &e) {
-      log.error("failed: `data = std::forward<U>(src)`. error = {}", e.what());
+      log.error("failed: `data = std::forward<U>(src)`. error = ", e.what());
     } LIBIMP_CATCH(...) {
       log.error("failed: `data = std::forward<U>(src)`. error = unknown");
     }
diff --git a/include/libimp/fmt.h b/include/libimp/fmt.h
index c35c68f7..6e5dd9de 100644
--- a/include/libimp/fmt.h
+++ b/include/libimp/fmt.h
@@ -95,7 +95,7 @@ LIBIMP_EXPORT std::string to_string(long double a, span<char const> fstr = {}) n
 LIBIMP_EXPORT std::string to_string(std::nullptr_t) noexcept;
 template <typename T,
           typename = std::enable_if_t<std::is_same<T, void>::value>>
-LIBIMP_EXPORT std::string to_string(T *a) noexcept;
+LIBIMP_EXPORT std::string to_string(T const volatile *a) noexcept;
 
 /// @brief Date and time.
 LIBIMP_EXPORT std::string to_string(std::tm const &a, span<char const> fstr = {}) noexcept;
@@ -118,5 +118,11 @@ auto tag_invoke(fmt_to_string_t, T &&arg) noexcept
   return ::LIBIMP::to_string(std::forward<T>(arg));
 }
 
+template <typename T>
+auto tag_invoke(fmt_to_string_t, fmt_ref<T> arg) noexcept
+  -> decltype(::LIBIMP::to_string(static_cast<T>(arg.param), arg.fstr)) {
+  return ::LIBIMP::to_string(static_cast<T>(arg.param), arg.fstr);
+}
+
 } // namespace detail
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/log.h b/include/libimp/log.h
index df9b794f..43924ba5 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -11,8 +11,6 @@
 #include <chrono>
 #include <exception>
 
-#include "fmt/format.h"
-
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
 #include "libimp/export.h"
@@ -40,9 +38,7 @@ struct context {
 
 LIBIMP_EXPORT std::string to_string(context &&) noexcept;
 
-/**
- * @brief Custom defined fmt_to_string method for imp::fmt
- */
+/// @brief Custom defined fmt_to_string method for imp::fmt
 template <typename T>
 std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), context &&arg) noexcept {
   return ::LIBIMP::log::to_string(std::move(arg));
@@ -151,8 +147,8 @@ class grip {
   char const *func_;
   level level_limit_;
 
-  template <typename Fmt, typename... A>
-  grip &output(log::level l, Fmt &&ft, A &&... args) noexcept {
+  template <typename... A>
+  grip &output(log::level l, A &&... args) noexcept {
     if (!printer_ || (enum_cast(l) < enum_cast(level_limit_))) {
       return *this;
     }
@@ -160,7 +156,7 @@ class grip {
     LIBIMP_TRY {
       ctx = {
         l, std::chrono::system_clock::now(), func_,
-        ::fmt::format(std::forward<Fmt>(ft), std::forward<A>(args)...),
+        fmt(std::forward<A>(args)...),
       };
     } LIBIMP_CATCH(std::exception const &e) {
       /// @remark [TBD] std::string constructor may throw an exception
@@ -178,30 +174,12 @@ class grip {
     , func_       (func)
     , level_limit_(level_limit) {}
 
-  template <typename Fmt, typename... A>
-  grip &trace(Fmt &&ft, A &&... args) noexcept {
-    return output(log::level::trace, std::forward<Fmt>(ft), std::forward<A>(args)...);
-  }
-  template <typename Fmt, typename... A>
-  grip &debug(Fmt &&ft, A &&... args) noexcept {
-    return output(log::level::debug, std::forward<Fmt>(ft), std::forward<A>(args)...);
-  }
-  template <typename Fmt, typename... A>
-  grip &info(Fmt &&ft, A &&... args) noexcept {
-    return output(log::level::info, std::forward<Fmt>(ft), std::forward<A>(args)...);
-  }
-  template <typename Fmt, typename... A>
-  grip &warning(Fmt &&ft, A &&... args) noexcept {
-    return output(log::level::warning, std::forward<Fmt>(ft), std::forward<A>(args)...);
-  }
-  template <typename Fmt, typename... A>
-  grip &error(Fmt &&ft, A &&... args) noexcept {
-    return output(log::level::error, std::forward<Fmt>(ft), std::forward<A>(args)...);
-  }
-  template <typename Fmt, typename... A>
-  grip &failed(Fmt &&ft, A &&... args) noexcept {
-    return output(log::level::failed, std::forward<Fmt>(ft), std::forward<A>(args)...);
-  }
+  template <typename... A> grip &trace  (A &&...args) noexcept { return output(log::level::trace  , std::forward<A>(args)...); }
+  template <typename... A> grip &debug  (A &&...args) noexcept { return output(log::level::debug  , std::forward<A>(args)...); }
+  template <typename... A> grip &info   (A &&...args) noexcept { return output(log::level::info   , std::forward<A>(args)...); }
+  template <typename... A> grip &warning(A &&...args) noexcept { return output(log::level::warning, std::forward<A>(args)...); }
+  template <typename... A> grip &error  (A &&...args) noexcept { return output(log::level::error  , std::forward<A>(args)...); }
+  template <typename... A> grip &failed (A &&...args) noexcept { return output(log::level::failed , std::forward<A>(args)...); }
 };
 
 } // namespace log
diff --git a/include/libimp/result.h b/include/libimp/result.h
index 6037b301..8603d625 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <type_traits>
+#include <string>
 #include <cstdint>
 
 #include "fmt/format.h"
@@ -14,6 +15,7 @@
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
 #include "libimp/export.h"
+#include "libimp/fmt.h"
 
 LIBIMP_NAMESPACE_BEG_
 
@@ -70,9 +72,12 @@ struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
   static T cast_from_code(result_type code) noexcept {
     return static_cast<T>(code);
   }
+  static std::string format(result<T> const &r) noexcept {
+    return fmt(*r);
+  }
   template <typename Out>
   static auto format(result<T> const &r, Out &&out) noexcept {
-    return format_to(out, "{}", *r);
+    return format_to(out, format(r));
   }
 };
 
@@ -86,12 +91,15 @@ struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
   static T cast_from_code(result_type code) noexcept {
     return reinterpret_cast<T>(code);
   }
-  template <typename Out>
-  static auto format(result<T> const &r, Out &&out) noexcept {
+  static std::string format(result<T> const &r) noexcept {
     if LIBIMP_LIKELY(r) {
-      return format_to(out, "{}", static_cast<void *>(*r));
+      return fmt(static_cast<void *>(*r));
     }
-    return format_to(out, "{}, code = {}", static_cast<void *>(*r), r.code_value());
+    return fmt(static_cast<void *>(*r), ", code = ", r.code_value());
+  }
+  template <typename Out>
+  static auto format(result<T> const &r, Out &&out) noexcept {
+    return format_to(out, format(r));
   }
 };
 
@@ -157,6 +165,19 @@ class result<T, DefTraits, std::enable_if_t<std::is_pointer<T>::value>> {
   friend bool operator!=(result const &lhs, result const &rhs) noexcept { return lhs.code_ != rhs.code_; }
 };
 
+/// @brief Custom defined fmt_to_string method for imp::fmt
+namespace detail {
+
+inline std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), result_code r) noexcept {
+  return fmt("[", (r ? "succ" : "fail"), ", value = ", *r, "]");
+}
+
+template <typename T, typename D>
+std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), result<T, D> r) noexcept {
+  return fmt("[", (r ? "succ" : "fail"), ", value = ", result<T, D>::default_traits_t::format(r), "]");
+}
+
+} // namespace detail
 LIBIMP_NAMESPACE_END_
 
 template <typename T, typename D>
diff --git a/include/libimp/system.h b/include/libimp/system.h
index 435d2579..ce207c66 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -13,6 +13,7 @@
 #include "libimp/def.h"
 #include "libimp/export.h"
 #include "libimp/result.h"
+#include "libimp/fmt.h"
 
 LIBIMP_NAMESPACE_BEG_
 namespace sys {
@@ -63,6 +64,13 @@ enum class info : std::int32_t {
 };
 LIBIMP_EXPORT result<std::int64_t> conf(info) noexcept;
 
+/**
+ * @brief @brief Custom defined fmt_to_string method for imp::fmt
+ */
+inline std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), error r) noexcept {
+  return error_msg(r.code());
+}
+
 } // namespace sys
 LIBIMP_NAMESPACE_END_
 
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index 9db9e139..613f3ad0 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -208,7 +208,7 @@ std::string to_string(std::nullptr_t) noexcept {
 }
 
 template <>
-std::string to_string<void, void>(void *a) noexcept {
+std::string to_string<void, void>(void const volatile *a) noexcept {
   if (a == nullptr) {
     return to_string(nullptr);
   }
diff --git a/src/libimp/log.cpp b/src/libimp/log.cpp
index 4bfc2f0c..925fc46a 100644
--- a/src/libimp/log.cpp
+++ b/src/libimp/log.cpp
@@ -3,8 +3,6 @@
 #include <utility>
 #include <cstdio>
 
-#include "fmt/chrono.h"
-
 LIBIMP_NAMESPACE_BEG_
 namespace log {
 
@@ -14,7 +12,7 @@ std::string to_string(context &&ctx) noexcept {
   };
   LIBIMP_TRY {
     auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(ctx.tp).time_since_epoch().count() % 1000;
-    return ::fmt::format("[{}][{:%Y-%m-%d %H:%M:%S}.{:03}][{}] {}", types[enum_cast(ctx.level)], ctx.tp, ms, ctx.func, ctx.text);
+    return fmt("[", types[enum_cast(ctx.level)], "][", ctx.tp, ".", spec("03")(ms), "][", ctx.func, "] ", ctx.text);
   } LIBIMP_CATCH(std::exception const &e) {
     /// @remark [TBD] std::string constructor may throw an exception
     return e.what();
diff --git a/src/libimp/platform/gnuc/demangle.h b/src/libimp/platform/gnuc/demangle.h
index e1ef540d..f843f7be 100644
--- a/src/libimp/platform/gnuc/demangle.h
+++ b/src/libimp/platform/gnuc/demangle.h
@@ -29,7 +29,7 @@ std::string demangle(span<char const> name) noexcept {
   int status = 0;
   char *realname = abi::__cxa_demangle(name.data(), buffer, &sz, &status);
   if (realname == nullptr) {
-    log.error("failed: abi::__cxa_demangle(sz = {}), status = {}", sz, status);
+    log.error("failed: abi::__cxa_demangle(sz = ", sz, "), status = ", status);
     std::free(buffer);
     return {};
   }
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index b9ccd399..25e449d7 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -46,8 +46,9 @@ std::string error_str(result_code code) noexcept {
 #if ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE)
   LIBIMP_LOG_();
   if (::strerror_r((int)code.value(), msg_buf, sizeof(msg_buf)) != 0) {
-    log.error("failed: strerror_r(code = {}, buf, buf-size = {}). error = {}", 
-             (int)code.value(), sizeof(msg_buf), error_code());
+    log.error("failed: strerror_r(code = ", (int)code.value(), 
+                      ", buf, buf-size = ", sizeof(msg_buf), 
+                      "). error = ", error_code());
     return {};
   }
   return msg_buf;
@@ -70,11 +71,11 @@ result<std::int64_t> conf(info r) noexcept {
     break;
   }
   default:
-    log.error("invalid info = {}", enum_cast(r));
+    log.error("invalid info = ", enum_cast(r));
     return {};
   }
   auto err = sys::error();
-  log.error("info = {}, error = {}", enum_cast(r), err);
+  log.error("info = ", enum_cast(r), ", error = ", err);
   return {false, (int)err.value()};
 }
 
diff --git a/src/libimp/platform/win/codecvt.h b/src/libimp/platform/win/codecvt.h
index abca9097..edcb785c 100644
--- a/src/libimp/platform/win/codecvt.h
+++ b/src/libimp/platform/win/codecvt.h
@@ -36,7 +36,7 @@ std::size_t cvt_cstr(char const *src, std::size_t slen, wchar_t *des, std::size_
   int cch_wc = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::MultiByteToWideChar(CP_ACP, 0, src, (int)slen, des, cch_wc);
   if (size_needed <= 0) {
-    log.error("failed: MultiByteToWideChar(CP_ACP). error = {}", sys::error_code());
+    log.error("failed: MultiByteToWideChar(CP_ACP). error = ", sys::error_code());
   }
   return size_needed;
 }
@@ -51,7 +51,7 @@ std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char *des, std::size_
   int cb_mb = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::WideCharToMultiByte(CP_ACP, 0, src, (int)slen, des, cb_mb, NULL, NULL);
   if (size_needed <= 0) {
-    log.error("failed: WideCharToMultiByte(CP_ACP). error = {}", sys::error_code());
+    log.error("failed: WideCharToMultiByte(CP_ACP). error = ", sys::error_code());
   }
   return size_needed;
 }
@@ -73,7 +73,7 @@ std::size_t cvt_cstr(char8_t const *src, std::size_t slen, wchar_t *des, std::si
   int cch_wc = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::MultiByteToWideChar(CP_UTF8, 0, (char *)src, (int)slen, des, cch_wc);
   if (size_needed <= 0) {
-    log.error("failed: MultiByteToWideChar(CP_UTF8). error = {}", sys::error_code());
+    log.error("failed: MultiByteToWideChar(CP_UTF8). error = ", sys::error_code());
   }
   return size_needed;
 }
@@ -88,7 +88,7 @@ std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char8_t *des, std::si
   int cb_mb = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::WideCharToMultiByte(CP_UTF8, 0, src, (int)slen, (char *)des, cb_mb, NULL, NULL);
   if (size_needed <= 0) {
-    log.error("failed: WideCharToMultiByte(CP_UTF8). error = {}", sys::error_code());
+    log.error("failed: WideCharToMultiByte(CP_UTF8). error = ", sys::error_code());
   }
   return size_needed;
 }
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index d8a199de..a24763aa 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -59,7 +59,7 @@ std::string error_str(result_code code) noexcept {
           MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
           (LPTSTR)&lpErrText,
           0, NULL) == 0) {
-      log.error("failed: FormatMessage(dwMessageId = {}). error = {}", err, error_code());
+      log.error("failed: FormatMessage(dwMessageId = ", err, "). error = ", error_code());
       return {};
     }
     LIBIMP_UNUSED auto buf_guard = std::unique_ptr<std::remove_pointer_t<LPVOID>, 
@@ -94,7 +94,7 @@ result<std::int64_t> conf(info r) noexcept {
     return (std::int64_t)info.dwPageSize;
   }
   default:
-    log.error("invalid info = {}", enum_cast(r));
+    log.error("invalid info = ", enum_cast(r));
     return {};
   }
 }
diff --git a/src/libimp/system.cpp b/src/libimp/system.cpp
index b5b73dc1..43d39720 100644
--- a/src/libimp/system.cpp
+++ b/src/libimp/system.cpp
@@ -1,6 +1,4 @@
 
-#include "fmt/format.h"
-
 #include "libimp/detect_plat.h"
 #if defined(LIBIMP_OS_WIN)
 # include "libimp/platform/win/system.h"
@@ -13,7 +11,7 @@ namespace sys {
 
 std::string error_msg(result_code code) noexcept {
   LIBIMP_TRY {
-    return ::fmt::format("[{}, \"{}\"]", code.value(), error_str(code));
+    return fmt("[", code.value(), ", \"", error_str(code), "\"]");
   } LIBIMP_CATCH(...) {
     return error_str(code);
   }
diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
index 366f53ba..69955bed 100644
--- a/src/libipc/platform/posix/shm_impl.h
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -69,7 +69,7 @@ result<int> shm_open_fd(std::string const &name, mode::type type) noexcept {
     flag |= O_CREAT;
     break;
   default:
-    log.error("mode type is invalid. type = {}", type);
+    log.error("mode type is invalid. type = ", type);
     return {};
   }
 
@@ -84,7 +84,7 @@ result_code ftruncate_fd(int fd, std::size_t size) noexcept {
   /// @see https://man7.org/linux/man-pages/man3/ftruncate.3p.html
   if (::ftruncate(fd, size) != posix::succ) {
     auto err = sys::error();
-    log.error("failed: ftruncate({}, {}). error = {}", fd, size, err);
+    log.error("failed: ftruncate(", fd, ", ", size, "). error = ", err);
     return err.code();
   }
   return {posix::succ};
@@ -102,8 +102,9 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   auto fd = shm_open_fd(name, type);
   if (!fd) return {};
   if (*fd == posix::failed) {
-    log.error("failed: shm_open(name = {}, type = {}). error = {}", 
-               name, type, sys::error());
+    log.error("failed: shm_open(name = ", name, 
+                             ", type = ", type, 
+                           "). error = ", sys::error());
     return {};
   }
   LIBIMP_UNUSED auto guard = std::unique_ptr<decltype(fd), void (*)(decltype(fd) *)> {
@@ -114,7 +115,7 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   /// @brief Try to get the size of this fd
   struct stat st;
   if (::fstat(*fd, &st) == posix::failed) {
-    log.error("failed: fstat(fd = {}). error = {}", *fd, sys::error());
+    log.error("failed: fstat(fd = ", *fd, "). error = ", sys::error());
     return {};
   }
 
@@ -132,7 +133,7 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   /// @brief Creates a new mapping in the virtual address space of the calling process.
   void *mem = ::mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_SHARED, *fd, 0);
   if (mem == MAP_FAILED) {
-    log.error("failed: mmap(size = {}, fd = {}). error = {}", size, *fd, sys::error());
+    log.error("failed: mmap(size = ", size, ", fd = ", *fd, "). error = ", sys::error());
     return {};
   }
   return new shm_handle{std::move(name), size, mem};
@@ -147,7 +148,7 @@ result_code shm_close(shm_t h) noexcept {
   if (shm == nullptr) return {};
   if (::munmap(shm->memp, shm->f_sz) == posix::failed) {
     auto err = sys::error();
-    log.error("failed: munmap({}, {}). error = {}", shm->memp, shm->f_sz, err);
+    log.error("failed: munmap(", shm->memp, ", ", shm->f_sz"). error = ", err);
     return err.code();
   }
   /// @brief no unlink the file.
diff --git a/src/libipc/platform/win/get_sa.h b/src/libipc/platform/win/get_sa.h
index 05887ee6..3964188e 100644
--- a/src/libipc/platform/win/get_sa.h
+++ b/src/libipc/platform/win/get_sa.h
@@ -30,11 +30,11 @@ inline LPSECURITY_ATTRIBUTES get_sa() {
       using namespace ::LIBIMP;
       log::grip log {"get_sa"};
       if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
-        log.error("failed: InitializeSecurityDescriptor(SECURITY_DESCRIPTOR_REVISION). error = {}", sys::error());
+        log.error("failed: InitializeSecurityDescriptor(SECURITY_DESCRIPTOR_REVISION). error = ", sys::error());
         return;
       }
       if (!::SetSecurityDescriptorDacl(&sd_, TRUE, NULL, FALSE)) {
-        log.error("failed: SetSecurityDescriptorDacl. error = {}", sys::error());
+        log.error("failed: SetSecurityDescriptorDacl. error = ", sys::error());
         return;
       }
       sa_.nLength = sizeof(SECURITY_ATTRIBUTES);
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index e7392ce1..58623dbd 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -41,7 +41,7 @@ result_code mmap_close(HANDLE h) {
   }
   if (!::CloseHandle(h)) {
     auto err = sys::error();
-    log.error("failed: CloseHandle({}). error = {}", h, err);
+    log.error("failed: CloseHandle(", h, "). error = ", err);
     return err.code();
   }
   return {ERROR_SUCCESS};
@@ -77,7 +77,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     HANDLE h = ::OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, t_name.c_str());
     if (h == NULL) {
       auto err = sys::error();
-      log.error("failed: OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, {}). error = {}", file, err);
+      log.error("failed: OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, ", file, "). error = ", err);
       return {nullptr, err.value()};
     }
     return h;
@@ -90,7 +90,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
                                    0, static_cast<DWORD>(size), t_name.c_str());
     if (h == NULL) {
       auto err = sys::error();
-      log.error("failed: CreateFileMapping(PAGE_READWRITE | SEC_COMMIT, {}, {}). error = {}", size, file, err);
+      log.error("failed: CreateFileMapping(PAGE_READWRITE | SEC_COMMIT, ", size, ", ", file, "). error = ", err);
       return {nullptr, err.value()};
     }
     return h;
@@ -104,7 +104,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     ///      https://learn.microsoft.com/en-us/previous-versions/windows/embedded/aa517331(v=msdn.10)
     return try_open();
   } else if (!(type & mode::create)) {
-    log.error("mode type is invalid. type = {}", type);
+    log.error("mode type is invalid. type = ", type);
     return {};
   }
   auto h = try_create();
@@ -112,7 +112,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
   /// @remark If the object exists before the function call, the function returns a handle to the existing object
   ///         (with its current size, not the specified size), and GetLastError returns ERROR_ALREADY_EXISTS.
   if ((type == mode::create) && (::GetLastError() == ERROR_ALREADY_EXISTS)) {
-    log.info("the file being created already exists. file = {}, type = {}", file, type);
+    log.info("the file being created already exists. file = ", file, ", type = ", type);
     mmap_close(*h);
     return {};
   }
@@ -132,7 +132,7 @@ result<LPVOID> mmap_memof(HANDLE h) {
   LPVOID mem = ::MapViewOfFile(h, FILE_MAP_ALL_ACCESS, 0, 0, 0);
   if (mem == NULL) {
     auto err = sys::error();
-    log.error("failed: MapViewOfFile({}, FILE_MAP_ALL_ACCESS). error = {}", h, err);
+    log.error("failed: MapViewOfFile(", h, ", FILE_MAP_ALL_ACCESS). error = ", err);
     return {nullptr, err.value()};
   }
   return mem;
@@ -151,7 +151,7 @@ result<SIZE_T> mmap_sizeof(LPCVOID mem) {
   MEMORY_BASIC_INFORMATION mem_info {};
   if (::VirtualQuery(mem, &mem_info, sizeof(mem_info)) == 0) {
     auto err = sys::error();
-    log.error("failed: VirtualQuery({}). error = {}", mem, err);
+    log.error("failed: VirtualQuery(", mem, "). error = ", err);
     return {false, (SIZE_T)err.value()};
   }
   return mem_info.RegionSize;
@@ -172,7 +172,7 @@ result_code mmap_release(HANDLE h, LPCVOID mem) {
     return {};
   }
   if (!::UnmapViewOfFile(mem)) {
-    log.warning("failed: UnmapViewOfFile. error = {}", sys::error());
+    log.warning("failed: UnmapViewOfFile. error = ", sys::error());
   }
   return mmap_close(h);
 }
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index d6019084..897d94b0 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -21,18 +21,18 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   LIBIMP_LOG_();
   auto h = mmap_open(name, size, type);
   if (h == NULL) {
-    log.error("failed: mmap_open(name = {}, size = {}, type = {}).", name, size, type);
+    log.error("failed: mmap_open(name = ", name, ", size = ", size, ", type = ", type, ").");
     return {nullptr, h.code_value()};
   }
   auto mem = mmap_memof(*h);
   if (*mem == NULL) {
-    log.error("failed: mmap_memof({}).", *h);
+    log.error("failed: mmap_memof(", *h, ").");
     mmap_close(*h);
     return {nullptr, mem.code_value()};
   }
   auto sz = mmap_sizeof(*mem);
   if (!sz) {
-    log.error("failed: mmap_sizeof({}).", *mem);
+    log.error("failed: mmap_sizeof(", *mem, ").");
     mmap_close(*h);
     return {nullptr, static_cast<result_type>(sz.value())};
   }
diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
index 7824e5dd..9b3b4cc0 100644
--- a/src/libpmr/memory_resource.cpp
+++ b/src/libpmr/memory_resource.cpp
@@ -18,7 +18,7 @@ bool verify_args(::LIBIMP::log::grip &log, std::size_t bytes, std::size_t alignm
     return false;
   }
   if ((alignment == 0) || (alignment & (alignment - 1)) != 0) {
-    log.error("invalid bytes = {}, alignment = {}", bytes, alignment);
+    log.error("invalid bytes = ", bytes, ", alignment = ", alignment);
     return false;
   }
   return true;
@@ -66,8 +66,9 @@ void *new_delete_resource::allocate(std::size_t bytes, std::size_t alignment) no
   void *p = nullptr;
   int ret = ::posix_memalign(&p, alignment, bytes);
   if (ret != 0) {
-    log.error("failed: posix_memalign(alignment = {}, bytes = {}). error = {}", 
-               alignment, bytes, sys::error(ret));
+    log.error("failed: posix_memalign(alignment = ", alignment, 
+                                       ", bytes = ", bytes, 
+                                      "). error = ", sys::error(ret));
     return nullptr;
   }
   return p;
diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index 18efc871..6c439304 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -93,7 +93,7 @@ namespace {
 template <typename PC>
 void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
   LIBIMP_LOG_();
-  log.info("\n\tStart with: {}, {} producers, {} consumers...", imp::nameof<PC>(), np, nc);
+  log.info("\n\tStart with: ", imp::nameof<PC>(), ", ", np, " producers, ", nc, " consumers...");
 
   constexpr static std::uint32_t loop_size = 100'0000;
 
@@ -112,7 +112,7 @@ void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
         std::this_thread::yield();
       }
       if (i % (loop_size / 10) == 0) {
-        log.info("[{}] put count: {}", n, i);
+        log.info("[", n, "] put count: ", i);
       }
     }
     --running;
diff --git a/test/imp/test_imp_result.cpp b/test/imp/test_imp_result.cpp
index 82304692..e79600f3 100644
--- a/test/imp/test_imp_result.cpp
+++ b/test/imp/test_imp_result.cpp
@@ -69,13 +69,13 @@ TEST(result, fmt) {
     imp::result<int> r1 {false, -123};
     EXPECT_EQ(fmt::format("{}", r1), fmt::format("[fail, value = {}]", -123));
     imp::result<void *> r2 {&r1};
-    EXPECT_EQ(fmt::format("{}", r2), fmt::format("[succ, value = {}]", (void *)&r1));
+    EXPECT_EQ(fmt::format("{}", r2), imp::fmt("[succ, value = ", (void *)&r1, "]"));
     int aaa {};
     imp::result<int *> r3 {&aaa};
-    EXPECT_EQ(fmt::format("{}", r3), fmt::format("[succ, value = {}]", (void *)&aaa));
+    EXPECT_EQ(fmt::format("{}", r3), imp::fmt("[succ, value = ", (void *)&aaa, "]"));
     imp::result<int *> r4 {nullptr};
-    EXPECT_EQ(fmt::format("{}", r4), fmt::format("[fail, value = {}, code = 0]", nullptr));
+    EXPECT_EQ(fmt::format("{}", r4), imp::fmt("[fail, value = ", nullptr, ", code = 0]"));
     r4 = {nullptr, 1234};
-    EXPECT_EQ(fmt::format("{}", r4), fmt::format("[fail, value = {}, code = 1234]", nullptr));
+    EXPECT_EQ(fmt::format("{}", r4), imp::fmt("[fail, value = ", nullptr, ", code = 1234]"));
   }
 }
\ No newline at end of file

From f8691a3a80c72788127a40261e577e3499589d17 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 27 Nov 2022 23:00:56 +0800
Subject: [PATCH 114/272] =?UTF-8?q?fix:=20expected=20=E2=80=98)=E2=80=99?=
 =?UTF-8?q?=20before=20string=20constant?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/libipc/platform/posix/shm_impl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
index 69955bed..a06ddda2 100644
--- a/src/libipc/platform/posix/shm_impl.h
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -148,7 +148,7 @@ result_code shm_close(shm_t h) noexcept {
   if (shm == nullptr) return {};
   if (::munmap(shm->memp, shm->f_sz) == posix::failed) {
     auto err = sys::error();
-    log.error("failed: munmap(", shm->memp, ", ", shm->f_sz"). error = ", err);
+    log.error("failed: munmap(", shm->memp, ", ", shm->f_sz, "). error = ", err);
     return err.code();
   }
   /// @brief no unlink the file.

From 03d352c238220fafea5ad508428b38a3852e6be1 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 28 Nov 2022 22:22:22 +0800
Subject: [PATCH 115/272] upd: [imp] remove {fmt} completely

---
 include/libimp/byte.h        | 40 +++++++++++++++++++++++------------
 include/libimp/fmt.h         | 15 +------------
 include/libimp/fmt_cpo.h     | 32 ++++++++++++++++++++++++++++
 include/libimp/result.h      | 35 ++----------------------------
 include/libimp/span.h        | 41 ++++++++++++------------------------
 include/libimp/system.h      | 11 +---------
 src/libimp/CMakeLists.txt    |  2 --
 test/imp/test_imp_byte.cpp   |  9 ++++----
 test/imp/test_imp_result.cpp | 18 ++++++++--------
 test/imp/test_imp_span.cpp   |  6 ++++--
 test/imp/test_imp_system.cpp |  6 +++---
 11 files changed, 97 insertions(+), 118 deletions(-)
 create mode 100644 include/libimp/fmt_cpo.h

diff --git a/include/libimp/byte.h b/include/libimp/byte.h
index aa0c4058..5bf2b6c5 100644
--- a/include/libimp/byte.h
+++ b/include/libimp/byte.h
@@ -10,10 +10,10 @@
 #include <cstdint>
 #include <cstddef>  // std::byte (since C++17)
 
-#include "fmt/format.h"
-
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
+#include "libimp/span.h"
+#include "libimp/fmt.h"
 
 #if defined(LIBIMP_CPP_17) && defined(__cpp_lib_byte)
 #define LIBIMP_CPP_LIB_BYTE_
@@ -46,7 +46,7 @@ class byte {
 public:
   constexpr byte() noexcept
     : byte(0) {}
-  
+
   template <typename T, typename = detail::is_integral<T>>
   constexpr byte(T v) noexcept
     : bits_(static_cast<std::uint8_t>(v)) {}
@@ -155,15 +155,27 @@ U *byte_cast(byte const *p) noexcept {
   return reinterpret_cast<U *>(p);
 }
 
-LIBIMP_NAMESPACE_END_
+/// @brief Converts a span into a view of its underlying bytes.
+/// @see https://en.cppreference.com/w/cpp/container/span/as_bytes
 
-template <>
-struct fmt::formatter<::LIBIMP::byte> {
-  constexpr auto parse(format_parse_context& ctx) const {
-    return ctx.end();
-  }
-  template <typename FormatContext>
-  auto format(::LIBIMP::byte b, FormatContext &ctx) {
-    return format_to(ctx.out(), "{:#04x}", static_cast<std::uint8_t>(b));
-  }
-};
+template <typename T, 
+          typename Byte = typename std::conditional<std::is_const<T>::value, byte const, byte>::type>
+auto as_bytes(span<T> s) noexcept -> span<Byte> {
+  return {byte_cast(s.data()), s.size_bytes()};
+}
+
+/// @brief Custom defined fmt_to_string method for imp::fmt
+namespace detail {
+
+inline std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), ::LIBIMP::byte b) {
+  return ::LIBIMP::to_string(static_cast<std::uint8_t>(b), "02x");
+}
+
+template <typename T, 
+          typename = std::enable_if_t<std::is_same<std::decay_t<T>, ::LIBIMP::byte>::value>>
+std::string tag_invoke(fmt_to_string_t, fmt_ref<T> arg) noexcept {
+  return ::LIBIMP::to_string(static_cast<std::uint8_t>(arg.param), arg.fstr);
+}
+
+} // namespace detail
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/fmt.h b/include/libimp/fmt.h
index 6e5dd9de..b76f7159 100644
--- a/include/libimp/fmt.h
+++ b/include/libimp/fmt.h
@@ -14,10 +14,10 @@
 #include <ctime>    // std::tm
 
 #include "libimp/def.h"
+#include "libimp/fmt_cpo.h"
 #include "libimp/span.h"
 #include "libimp/detect_plat.h"
 #include "libimp/export.h"
-#include "libimp/generic.h"
 
 LIBIMP_NAMESPACE_BEG_
 
@@ -35,19 +35,6 @@ auto spec(char const (&fstr)[N]) noexcept {
   };
 }
 
-namespace detail {
-
-struct fmt_to_string_t {
-  template <typename T>
-  std::string operator()(T &&arg) const {
-    return ::LIBIMP::tag_invoke(fmt_to_string_t{}, std::forward<T>(arg));
-  }
-};
-
-} // namespace detail
-
-constexpr detail::fmt_to_string_t fmt_to_string {};
-
 template <typename... A>
 std::string fmt(A &&...args) {
   std::string joined;
diff --git a/include/libimp/fmt_cpo.h b/include/libimp/fmt_cpo.h
new file mode 100644
index 00000000..dd5bb288
--- /dev/null
+++ b/include/libimp/fmt_cpo.h
@@ -0,0 +1,32 @@
+/**
+ * @file libimp/fmt_cpo.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief String formatting CPO.
+ * @date 2022-11-28
+ */
+#pragma once
+
+#include <string>
+
+#include "libimp/def.h"
+#include "libimp/generic.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * @brief Supports custom fmt_to_string methods for imp::fmt.
+ */
+namespace detail {
+
+struct fmt_to_string_t {
+  template <typename T>
+  std::string operator()(T &&arg) const {
+    return ::LIBIMP::tag_invoke(fmt_to_string_t{}, std::forward<T>(arg));
+  }
+};
+
+} // namespace detail
+
+constexpr detail::fmt_to_string_t fmt_to_string {};
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/result.h b/include/libimp/result.h
index 8603d625..158a519c 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -10,8 +10,6 @@
 #include <string>
 #include <cstdint>
 
-#include "fmt/format.h"
-
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
 #include "libimp/export.h"
@@ -75,10 +73,6 @@ struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
   static std::string format(result<T> const &r) noexcept {
     return fmt(*r);
   }
-  template <typename Out>
-  static auto format(result<T> const &r, Out &&out) noexcept {
-    return format_to(out, format(r));
-  }
 };
 
 template <typename T>
@@ -97,10 +91,6 @@ struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
     }
     return fmt(static_cast<void *>(*r), ", code = ", r.code_value());
   }
-  template <typename Out>
-  static auto format(result<T> const &r, Out &&out) noexcept {
-    return format_to(out, format(r));
-  }
 };
 
 } // namespace detail_result
@@ -168,35 +158,14 @@ class result<T, DefTraits, std::enable_if_t<std::is_pointer<T>::value>> {
 /// @brief Custom defined fmt_to_string method for imp::fmt
 namespace detail {
 
-inline std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), result_code r) noexcept {
+inline std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), result_code r) {
   return fmt("[", (r ? "succ" : "fail"), ", value = ", *r, "]");
 }
 
 template <typename T, typename D>
-std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), result<T, D> r) noexcept {
+std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), result<T, D> r) {
   return fmt("[", (r ? "succ" : "fail"), ", value = ", result<T, D>::default_traits_t::format(r), "]");
 }
 
 } // namespace detail
 LIBIMP_NAMESPACE_END_
-
-template <typename T, typename D>
-struct fmt::formatter<::LIBIMP::result<T, D>> {
-  constexpr auto parse(format_parse_context& ctx) const {
-    return ctx.end();
-  }
-  template <typename FormatContext>
-  auto format(::LIBIMP::result<T, D> r, FormatContext &ctx) {
-    return format_to(::LIBIMP::result<T, D>::default_traits_t::format(r, 
-           format_to(ctx.out(), "[{}, value = ", r ? "succ" : "fail")), "]");
-  }
-};
-
-template <>
-struct fmt::formatter<::LIBIMP::result_code>
-          : formatter<::LIBIMP::result<::LIBIMP::result_type>> {
-  template <typename FormatContext>
-  auto format(::LIBIMP::result_code r, FormatContext &ctx) {
-    return format_to(ctx.out(), "[{}, value = {}]", (r ? "succ" : "fail"), *r);
-  }
-};
diff --git a/include/libimp/span.h b/include/libimp/span.h
index 1e613267..ec88c373 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -17,11 +17,9 @@
 #include <cstdint>
 #include <initializer_list>
 
-#include "fmt/format.h"
-
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
-#include "libimp/byte.h"
+#include "libimp/fmt_cpo.h"
 
 #if defined(LIBIMP_CPP_20) && defined(__cpp_lib_span)
 #include <span>
@@ -222,15 +220,6 @@ bool operator==(span<T> a, span<U> b) noexcept {
   return true;
 }
 
-/// @brief Converts a span into a view of its underlying bytes.
-/// @see https://en.cppreference.com/w/cpp/container/span/as_bytes
-
-template <typename T, 
-          typename Byte = typename std::conditional<std::is_const<T>::value, byte const, byte>::type>
-auto as_bytes(span<T> s) noexcept -> span<Byte> {
-  return {byte_cast(s.data()), s.size_bytes()};
-}
-
 /// @brief Constructs an object of type T and wraps it in a span.
 /// Before C++17, template argument deduction for class templates was not supported.
 /// @see https://en.cppreference.com/w/cpp/language/template_argument_deduction
@@ -278,22 +267,20 @@ inline auto make_span(std::string const &str) noexcept -> span<char const> {
   return {str.data(), str.size()};
 }
 
-LIBIMP_NAMESPACE_END_
+/// @brief Custom defined fmt_to_string method for imp::fmt
+namespace detail {
 
 template <typename T>
-struct fmt::formatter<::LIBIMP::span<T>> {
-  constexpr auto parse(format_parse_context& ctx) const {
-    return ctx.end();
+std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), span<T> s) {
+  if (s.empty()) {
+    return {};
   }
-  template <typename FormatContext>
-  auto format(::LIBIMP::span<T> s, FormatContext &ctx) {
-    if (s.empty()) {
-      return format_to(ctx.out(), "");
-    }
-    auto appender = format_to(ctx.out(), "{}", s[0]);
-    for (std::size_t i = 1; i < s.size(); ++i) {
-      appender = format_to(appender, " {}", s[i]);
-    }
-    return appender;
+  auto appender = fmt(s[0]);
+  for (std::size_t i = 1; i < s.size(); ++i) {
+    appender += fmt(' ', s[i]);
   }
-};
+  return appender;
+}
+
+} // namespace detail
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/system.h b/include/libimp/system.h
index ce207c66..69ab783a 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -13,7 +13,7 @@
 #include "libimp/def.h"
 #include "libimp/export.h"
 #include "libimp/result.h"
-#include "libimp/fmt.h"
+#include "libimp/fmt_cpo.h"
 
 LIBIMP_NAMESPACE_BEG_
 namespace sys {
@@ -73,12 +73,3 @@ inline std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), error r) noexce
 
 } // namespace sys
 LIBIMP_NAMESPACE_END_
-
-template <>
-struct fmt::formatter<::LIBIMP::sys::error>
-          : formatter<std::string> {
-  template <typename FormatContext>
-  auto format(::LIBIMP::sys::error r, FormatContext &ctx) {
-    return format_to(ctx.out(), ::LIBIMP::sys::error_msg(r.code()));
-  }
-};
diff --git a/src/libimp/CMakeLists.txt b/src/libimp/CMakeLists.txt
index f21db725..bcd46f06 100644
--- a/src/libimp/CMakeLists.txt
+++ b/src/libimp/CMakeLists.txt
@@ -29,8 +29,6 @@ target_include_directories(${PROJECT_NAME}
   PUBLIC  ${LIBIPC_PROJECT_DIR}/include
   PRIVATE ${LIBIPC_PROJECT_DIR}/src)
 
-target_link_libraries(${PROJECT_NAME} PUBLIC fmt)
-
 install(
   TARGETS ${PROJECT_NAME}
   RUNTIME DESTINATION bin
diff --git a/test/imp/test_imp_byte.cpp b/test/imp/test_imp_byte.cpp
index ad2fd373..b8f9e260 100644
--- a/test/imp/test_imp_byte.cpp
+++ b/test/imp/test_imp_byte.cpp
@@ -3,6 +3,7 @@
 
 #include "libimp/byte.h"
 #include "libimp/span.h"
+#include "libimp/fmt.h"
 
 TEST(byte, construct) {
   {
@@ -38,13 +39,13 @@ TEST(byte, compare) {
 TEST(byte, fmt) {
   {
     imp::byte b1, b2(31);
-    EXPECT_EQ(fmt::format("{}", b1), "0x00");
-    EXPECT_EQ(fmt::format("{}", b2), "0x1f");
+    EXPECT_EQ(imp::fmt(b1), "00");
+    EXPECT_EQ(imp::fmt(b2), "1f");
+    EXPECT_EQ(imp::fmt(imp::spec("03X")(b2)), "01F");
   }
   {
     imp::byte bs[] {31, 32, 33, 34, 35, 36, 37, 38};
-    EXPECT_EQ(fmt::format("{}", imp::make_span(bs)), 
-              "0x1f 0x20 0x21 0x22 0x23 0x24 0x25 0x26");
+    EXPECT_EQ(imp::fmt(imp::make_span(bs)), "1f 20 21 22 23 24 25 26");
   }
 }
 
diff --git a/test/imp/test_imp_result.cpp b/test/imp/test_imp_result.cpp
index e79600f3..162264c4 100644
--- a/test/imp/test_imp_result.cpp
+++ b/test/imp/test_imp_result.cpp
@@ -2,9 +2,9 @@
 #include <sstream>
 
 #include "gtest/gtest.h"
-#include "fmt/format.h"
 
 #include "libimp/result.h"
+#include "libimp/fmt.h"
 
 TEST(result, ok) {
   imp::result_code ret;
@@ -59,23 +59,23 @@ TEST(result, compare) {
 TEST(result, fmt) {
   {
     imp::result_code r1;
-    EXPECT_EQ(fmt::format("{}", r1), "[fail, value = 0]");
+    EXPECT_EQ(imp::fmt(r1), "[fail, value = 0]");
     imp::result_code r2(true, 65537);
-    EXPECT_EQ(fmt::format("{}", r2), "[succ, value = 65537]");
+    EXPECT_EQ(imp::fmt(r2), "[succ, value = 65537]");
     imp::result_code r3(0);
-    EXPECT_EQ(fmt::format("{}", r3), "[succ, value = 0]");
+    EXPECT_EQ(imp::fmt(r3), "[succ, value = 0]");
   }
   {
     imp::result<int> r1 {false, -123};
-    EXPECT_EQ(fmt::format("{}", r1), fmt::format("[fail, value = {}]", -123));
+    EXPECT_EQ(imp::fmt(r1), imp::fmt("[fail, value = ", -123, "]"));
     imp::result<void *> r2 {&r1};
-    EXPECT_EQ(fmt::format("{}", r2), imp::fmt("[succ, value = ", (void *)&r1, "]"));
+    EXPECT_EQ(imp::fmt(r2), imp::fmt("[succ, value = ", (void *)&r1, "]"));
     int aaa {};
     imp::result<int *> r3 {&aaa};
-    EXPECT_EQ(fmt::format("{}", r3), imp::fmt("[succ, value = ", (void *)&aaa, "]"));
+    EXPECT_EQ(imp::fmt(r3), imp::fmt("[succ, value = ", (void *)&aaa, "]"));
     imp::result<int *> r4 {nullptr};
-    EXPECT_EQ(fmt::format("{}", r4), imp::fmt("[fail, value = ", nullptr, ", code = 0]"));
+    EXPECT_EQ(imp::fmt(r4), imp::fmt("[fail, value = ", nullptr, ", code = 0]"));
     r4 = {nullptr, 1234};
-    EXPECT_EQ(fmt::format("{}", r4), imp::fmt("[fail, value = ", nullptr, ", code = 1234]"));
+    EXPECT_EQ(imp::fmt(r4), imp::fmt("[fail, value = ", nullptr, ", code = 1234]"));
   }
 }
\ No newline at end of file
diff --git a/test/imp/test_imp_span.cpp b/test/imp/test_imp_span.cpp
index f49ae258..630bca24 100644
--- a/test/imp/test_imp_span.cpp
+++ b/test/imp/test_imp_span.cpp
@@ -6,6 +6,8 @@
 
 #include "libimp/span.h"
 #include "libimp/countof.h"
+#include "libimp/byte.h"
+#include "libimp/fmt.h"
 
 TEST(span, to_address) {
   int *a = new int;
@@ -56,6 +58,6 @@ TEST(span, span) {
 }
 
 TEST(span, fmt) {
-  EXPECT_EQ(fmt::format("{}", imp::span<int>{}), "");
-  EXPECT_EQ(fmt::format("{}", imp::make_span({1, 3, 2, 4, 5, 6, 7})), "1 3 2 4 5 6 7");
+  EXPECT_EQ(imp::fmt(imp::span<int>{}), "");
+  EXPECT_EQ(imp::fmt(imp::make_span({1, 3, 2, 4, 5, 6, 7})), "1 3 2 4 5 6 7");
 }
\ No newline at end of file
diff --git a/test/imp/test_imp_system.cpp b/test/imp/test_imp_system.cpp
index d4128ed9..b3d46c2a 100644
--- a/test/imp/test_imp_system.cpp
+++ b/test/imp/test_imp_system.cpp
@@ -3,11 +3,11 @@
 #include <string>
 
 #include "gtest/gtest.h"
-#include "fmt/format.h"
 
 #include "libimp/system.h"
 #include "libimp/detect_plat.h"
 #include "libimp/codecvt.h"
+#include "libimp/fmt.h"
 
 #if defined(LIBIMP_OS_WIN)
 #include <Windows.h>
@@ -25,11 +25,11 @@ TEST(system, error_code) {
 
   imp::sys::error e_obj {err};
   EXPECT_EQ(err.value(), e_obj.value());
-  auto e_msg = fmt::format("{}", imp::sys::error_msg(imp::sys::error_code()));
+  auto e_msg = imp::fmt(imp::sys::error_msg(imp::sys::error_code()));
   std::stringstream ss;
   ss << imp::sys::error{};
   EXPECT_EQ(e_msg, ss.str());
-  EXPECT_EQ(e_msg, fmt::format("{}", imp::sys::error()));
+  EXPECT_EQ(e_msg, imp::fmt(imp::sys::error()));
   std::cout << e_msg << "\n";
 }
 

From 7ba65c6f187941d3d1315a72d2fc70984b051ead Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 28 Nov 2022 22:27:07 +0800
Subject: [PATCH 116/272] upd: benchmark cmake

---
 benchmark/CMakeLists.txt  | 6 ++++++
 src/libimp/CMakeLists.txt | 6 ------
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/benchmark/CMakeLists.txt b/benchmark/CMakeLists.txt
index 5d04019e..f8dbd5dc 100644
--- a/benchmark/CMakeLists.txt
+++ b/benchmark/CMakeLists.txt
@@ -19,6 +19,12 @@ set(BENCHMARK_ENABLE_INSTALL OFF)
 add_definitions(-DBENCHMARK_STATIC_DEFINE)
 FetchContent_MakeAvailable(googlebenchmark)
 
+FetchContent_Declare(fmtlib
+  GIT_REPOSITORY https://github.com/fmtlib/fmt.git
+  GIT_TAG        9.1.0
+)
+FetchContent_MakeAvailable(fmtlib)
+
 include_directories(
   ${LIBIPC_PROJECT_DIR}/include 
   ${LIBIPC_PROJECT_DIR}/src
diff --git a/src/libimp/CMakeLists.txt b/src/libimp/CMakeLists.txt
index bcd46f06..60983a84 100644
--- a/src/libimp/CMakeLists.txt
+++ b/src/libimp/CMakeLists.txt
@@ -5,12 +5,6 @@ if(NOT MSVC)
     -Wno-attributes)
 endif()
 
-FetchContent_Declare(fmtlib
-  GIT_REPOSITORY https://github.com/fmtlib/fmt.git
-  GIT_TAG        9.1.0
-)
-FetchContent_MakeAvailable(fmtlib)
-
 aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libimp SRC_FILES)
 
 file(GLOB HEAD_FILES

From 9c331ba03d3a489b1bf8bbd256578247ee714dbc Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 28 Nov 2022 22:32:39 +0800
Subject: [PATCH 117/272] =?UTF-8?q?fix:=20=E2=80=98fmt=E2=80=99=20was=20no?=
 =?UTF-8?q?t=20declared?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 include/libimp/fmt.h  | 12 ++++++++++++
 include/libimp/span.h | 17 -----------------
 2 files changed, 12 insertions(+), 17 deletions(-)

diff --git a/include/libimp/fmt.h b/include/libimp/fmt.h
index b76f7159..67f32ccc 100644
--- a/include/libimp/fmt.h
+++ b/include/libimp/fmt.h
@@ -111,5 +111,17 @@ auto tag_invoke(fmt_to_string_t, fmt_ref<T> arg) noexcept
   return ::LIBIMP::to_string(static_cast<T>(arg.param), arg.fstr);
 }
 
+template <typename T>
+std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), span<T> s) {
+  if (s.empty()) {
+    return {};
+  }
+  auto appender = fmt(s[0]);
+  for (std::size_t i = 1; i < s.size(); ++i) {
+    appender += fmt(' ', s[i]);
+  }
+  return appender;
+}
+
 } // namespace detail
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/span.h b/include/libimp/span.h
index ec88c373..fd25f494 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -19,7 +19,6 @@
 
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
-#include "libimp/fmt_cpo.h"
 
 #if defined(LIBIMP_CPP_20) && defined(__cpp_lib_span)
 #include <span>
@@ -267,20 +266,4 @@ inline auto make_span(std::string const &str) noexcept -> span<char const> {
   return {str.data(), str.size()};
 }
 
-/// @brief Custom defined fmt_to_string method for imp::fmt
-namespace detail {
-
-template <typename T>
-std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), span<T> s) {
-  if (s.empty()) {
-    return {};
-  }
-  auto appender = fmt(s[0]);
-  for (std::size_t i = 1; i < s.size(); ++i) {
-    appender += fmt(' ', s[i]);
-  }
-  return appender;
-}
-
-} // namespace detail
 LIBIMP_NAMESPACE_END_

From b98329c062d998863cce269acce8bba3a3063d1d Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 3 Dec 2022 14:28:23 +0800
Subject: [PATCH 118/272] del: old demos

---
 demo/chat/CMakeLists.txt      |   8 --
 demo/chat/main.cpp            |  62 ---------------
 demo/msg_que/CMakeLists.txt   |  11 ---
 demo/msg_que/main.cpp         | 137 ----------------------------------
 demo/send_recv/CMakeLists.txt |  11 ---
 demo/send_recv/main.cpp       |  72 ------------------
 6 files changed, 301 deletions(-)
 delete mode 100755 demo/chat/CMakeLists.txt
 delete mode 100755 demo/chat/main.cpp
 delete mode 100755 demo/msg_que/CMakeLists.txt
 delete mode 100644 demo/msg_que/main.cpp
 delete mode 100644 demo/send_recv/CMakeLists.txt
 delete mode 100644 demo/send_recv/main.cpp

diff --git a/demo/chat/CMakeLists.txt b/demo/chat/CMakeLists.txt
deleted file mode 100755
index c5bcea84..00000000
--- a/demo/chat/CMakeLists.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-project(chat)
-
-file(GLOB SRC_FILES ./*.cpp)
-file(GLOB HEAD_FILES ./*.h)
-
-add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
-
-target_link_libraries(${PROJECT_NAME} ipc)
diff --git a/demo/chat/main.cpp b/demo/chat/main.cpp
deleted file mode 100755
index ec9c3be4..00000000
--- a/demo/chat/main.cpp
+++ /dev/null
@@ -1,62 +0,0 @@
-
-#include <iostream>
-#include <string>
-#include <thread>
-#include <regex>
-#include <atomic>
-
-#include "libipc/ipc.h"
-
-namespace {
-
-constexpr char const name__[] = "ipc-chat";
-constexpr char const quit__[] = "q";
-constexpr char const id__  [] = "c";
-
-inline std::size_t calc_unique_id() {
-    static ipc::shm::handle g_shm { "__CHAT_ACC_STORAGE__", sizeof(std::atomic<std::size_t>) };
-    return static_cast<std::atomic<std::size_t>*>(g_shm.get())->fetch_add(1, std::memory_order_relaxed);
-}
-
-ipc::channel sender__   { name__, ipc::sender   };
-ipc::channel receiver__ { name__, ipc::receiver };
-
-} // namespace
-
-int main() {
-    std::string buf, id = id__ + std::to_string(calc_unique_id());
-    std::regex  reg { "(c\\d+)> (.*)" };
-
-    std::thread r {[&id, &reg] {
-        std::cout << id << " is ready." << std::endl;
-        while (1) {
-            ipc::buff_t buf = receiver__.recv();
-            if (buf.empty()) break; // quit
-            std::string dat { buf.get<char const *>(), buf.size() - 1 };
-            std::smatch mid;
-            if (std::regex_match(dat, mid, reg)) {
-                if (mid.str(1) == id) {
-                    if (mid.str(2) == quit__) {
-                        break;
-                    }
-                    continue;
-                }
-            }
-            std::cout << dat << std::endl;
-        }
-        std::cout << id << " receiver is quit..." << std::endl;
-    }};
-
-    for (/*int i = 1*/;; /*++i*/) {
-        std::cin >> buf;
-        if (buf.empty() || (buf == quit__)) break;
-//        std::cout << "[" << i << "]" << std::endl;
-        sender__.send(id + "> " + buf);
-        buf.clear();
-    }
-
-    receiver__.disconnect();
-    r.join();
-    std::cout << id << " sender is quit..." << std::endl;
-    return 0;
-}
diff --git a/demo/msg_que/CMakeLists.txt b/demo/msg_que/CMakeLists.txt
deleted file mode 100755
index da0de717..00000000
--- a/demo/msg_que/CMakeLists.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-project(msg_que)
-
-include_directories(
-    ${LIBIPC_PROJECT_DIR}/3rdparty)
-
-file(GLOB SRC_FILES ./*.cpp)
-file(GLOB HEAD_FILES ./*.h)
-
-add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
-
-target_link_libraries(${PROJECT_NAME} ipc)
diff --git a/demo/msg_que/main.cpp b/demo/msg_que/main.cpp
deleted file mode 100644
index eda7f517..00000000
--- a/demo/msg_que/main.cpp
+++ /dev/null
@@ -1,137 +0,0 @@
-
-#include <signal.h>
-
-#include <iostream>
-#include <string>
-#include <atomic>
-#include <thread>
-#include <chrono>
-#include <cstddef>
-
-#include "libipc/ipc.h"
-#include "capo/random.hpp"
-
-namespace {
-
-constexpr char const name__  [] = "ipc-msg-que";
-constexpr char const mode_s__[] = "s";
-constexpr char const mode_r__[] = "r";
-
-constexpr std::size_t const min_sz = 128;
-constexpr std::size_t const max_sz = 1024 * 16;
-
-std::atomic<bool> is_quit__ {false};
-std::atomic<std::size_t> size_counter__ {0};
-
-using msg_que_t = ipc::chan<ipc::relat::single, ipc::relat::multi, ipc::trans::broadcast>;
-
-msg_que_t que__{ name__ };
-ipc::byte_t buff__[max_sz];
-capo::random<> rand__{ 
-    static_cast<int>(min_sz), 
-    static_cast<int>(max_sz)
-};
-
-inline std::string str_of_size(std::size_t sz) noexcept {
-    if (sz > 1024 * 1024) {
-        return std::to_string(sz / (1024 * 1024)) + " MB";
-    }
-    if (sz > 1024) {
-        return std::to_string(sz / 1024) + " KB";
-    }
-    return std::to_string(sz) + " bytes";
-}
-
-inline std::string speed_of(std::size_t sz) noexcept {
-    return str_of_size(sz) + "/s";
-}
-
-void do_counting() {
-    for (int i = 1; !is_quit__.load(std::memory_order_acquire); ++i) {
-        std::this_thread::sleep_for(std::chrono::milliseconds(100)); // 100 ms
-        if (i % 10) continue;
-        i = 0;
-        std::cout
-            << speed_of(size_counter__.exchange(0, std::memory_order_relaxed))
-            << std::endl;
-    }
-}
-
-void do_send() {
-    std::cout 
-        << __func__ << ": start [" 
-        << str_of_size(min_sz) << " - " << str_of_size(max_sz) 
-        << "]...\n";
-    if (!que__.reconnect(ipc::sender)) {
-        std::cerr << __func__ << ": connect failed.\n";
-    }
-    else {
-        std::thread counting{ do_counting };
-        while (!is_quit__.load(std::memory_order_acquire)) {
-            std::size_t sz = static_cast<std::size_t>(rand__());
-            if (!que__.send(ipc::buff_t(buff__, sz))) {
-                std::cerr << __func__ << ": send failed.\n";
-                std::cout << __func__ << ": waiting for receiver...\n";
-                if (!que__.wait_for_recv(1)) {
-                    std::cerr << __func__ << ": wait receiver failed.\n";
-                    is_quit__.store(true, std::memory_order_release);
-                    break;
-                }
-            }
-            size_counter__.fetch_add(sz, std::memory_order_relaxed);
-            std::this_thread::yield();
-        }
-        counting.join();
-    }
-    std::cout << __func__ << ": quit...\n";
-}
-
-void do_recv() {
-    std::cout
-        << __func__ << ": start ["
-        << str_of_size(min_sz) << " - " << str_of_size(max_sz)
-        << "]...\n";
-    if (!que__.reconnect(ipc::receiver)) {
-        std::cerr << __func__ << ": connect failed.\n";
-    }
-    else {
-        std::thread counting{ do_counting };
-        while (!is_quit__.load(std::memory_order_acquire)) {
-            auto msg = que__.recv();
-            if (msg.empty()) break;
-            size_counter__.fetch_add(msg.size(), std::memory_order_relaxed);
-        }
-        counting.join();
-    }
-    std::cout << __func__ << ": quit...\n";
-}
-
-} // namespace
-
-int main(int argc, char ** argv) {
-    if (argc < 2) return 0;
-
-    auto exit = [](int) {
-        is_quit__.store(true, std::memory_order_release);
-        que__.disconnect();
-    };
-    ::signal(SIGINT  , exit);
-    ::signal(SIGABRT , exit);
-    ::signal(SIGSEGV , exit);
-    ::signal(SIGTERM , exit);
-#if defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
-    defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
-    defined(WINCE) || defined(_WIN32_WCE)
-    ::signal(SIGBREAK, exit);
-#else
-    ::signal(SIGHUP  , exit);
-#endif
-
-    std::string mode {argv[1]};
-    if (mode == mode_s__) {
-        do_send();
-    } else if (mode == mode_r__) {
-        do_recv();
-    }
-    return 0;
-}
diff --git a/demo/send_recv/CMakeLists.txt b/demo/send_recv/CMakeLists.txt
deleted file mode 100644
index 9d3f0fbd..00000000
--- a/demo/send_recv/CMakeLists.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-project(send_recv)
-
-include_directories(
-    ${LIBIPC_PROJECT_DIR}/3rdparty)
-
-file(GLOB SRC_FILES ./*.cpp)
-file(GLOB HEAD_FILES ./*.h)
-
-add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
-
-target_link_libraries(${PROJECT_NAME} ipc)
diff --git a/demo/send_recv/main.cpp b/demo/send_recv/main.cpp
deleted file mode 100644
index 52287c2e..00000000
--- a/demo/send_recv/main.cpp
+++ /dev/null
@@ -1,72 +0,0 @@
-
-#include <signal.h>
-
-#include <iostream>
-#include <string>
-#include <thread>
-#include <chrono>
-#include <atomic>
-
-#include "libipc/ipc.h"
-
-namespace {
-
-std::atomic<bool> is_quit__ {false};
-ipc::channel *ipc__ = nullptr;
-
-void do_send(int size, int interval) {
-    ipc::channel ipc {"ipc", ipc::sender};
-    ipc__ = &ipc;
-    std::string buffer(size, 'A');
-    while (!is_quit__.load(std::memory_order_acquire)) {
-        std::cout << "send size: " << buffer.size() + 1 << "\n";
-        ipc.send(buffer, 0/*tm*/);
-        std::this_thread::sleep_for(std::chrono::milliseconds(interval));
-    }
-}
-
-void do_recv(int interval) {
-    ipc::channel ipc {"ipc", ipc::receiver};
-    ipc__ = &ipc;
-    while (!is_quit__.load(std::memory_order_acquire)) {
-        ipc::buff_t recv;
-        for (int k = 1; recv.empty(); ++k) {
-            std::cout << "recv waiting... " << k << "\n";
-            recv = ipc.recv(interval);
-            if (is_quit__.load(std::memory_order_acquire)) return;
-        }
-        std::cout << "recv size: " << recv.size() << "\n";
-    }
-}
-
-} // namespace
-
-int main(int argc, char ** argv) {
-    if (argc < 3) return -1;
-
-    auto exit = [](int) {
-        is_quit__.store(true, std::memory_order_release);
-        if (ipc__ != nullptr) ipc__->disconnect();
-    };
-    ::signal(SIGINT  , exit);
-    ::signal(SIGABRT , exit);
-    ::signal(SIGSEGV , exit);
-    ::signal(SIGTERM , exit);
-#if defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
-    defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
-    defined(WINCE) || defined(_WIN32_WCE)
-    ::signal(SIGBREAK, exit);
-#else
-    ::signal(SIGHUP  , exit);
-#endif
-
-    std::string mode {argv[1]};
-    if (mode == "send") {
-        if (argc < 4) return -1;
-        do_send(std::stoi(argv[2]) /*size*/, 
-                std::stoi(argv[3]) /*interval*/);
-    } else if (mode == "recv") {
-        do_recv(std::stoi(argv[2]) /*interval*/);
-    }
-    return 0;
-}

From 73443ee0a6cf54717bdbd74fa0d4bcd1dfbf4fd0 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 3 Dec 2022 16:16:55 +0800
Subject: [PATCH 119/272] upd: [imp] optimize the performance of fmt a little
 bit

---
 benchmark/benchmark_fmt.cpp | 69 ++++++++++++++++++++++++++++++++++
 benchmark/benchmark_log.cpp |  8 ++--
 include/libimp/fmt.h        | 74 +++++++++++++++++++++++++++++--------
 src/libimp/fmt.cpp          | 49 ++----------------------
 4 files changed, 135 insertions(+), 65 deletions(-)
 create mode 100644 benchmark/benchmark_fmt.cpp

diff --git a/benchmark/benchmark_fmt.cpp b/benchmark/benchmark_fmt.cpp
new file mode 100644
index 00000000..0693203d
--- /dev/null
+++ b/benchmark/benchmark_fmt.cpp
@@ -0,0 +1,69 @@
+#include <tuple>
+
+#include "benchmark/benchmark.h"
+
+#include "fmt/format.h"
+#include "fmt/chrono.h"
+
+#include "libimp/fmt.h"
+
+namespace {
+
+void imp_fmt_string(benchmark::State &state) {
+  for (auto _ : state) {
+    imp::fmt("hello world. hello world. hello world. hello world. hello world.");
+  }
+}
+
+void fmt_format_string(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = fmt::format("hello world. hello world. hello world. hello world. hello world.");
+  }
+}
+
+void imp_fmt_int(benchmark::State &state) {
+  for (auto _ : state) {
+    imp::fmt(654321);
+  }
+}
+
+void fmt_format_int(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = fmt::format("{}", 654321);
+  }
+}
+
+void imp_fmt_float(benchmark::State &state) {
+  for (auto _ : state) {
+    imp::fmt(654.321);
+  }
+}
+
+void fmt_format_float(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = fmt::format("{}", 654.321);
+  }
+}
+
+void imp_fmt_chrono(benchmark::State &state) {
+  for (auto _ : state) {
+    imp::fmt(std::chrono::system_clock::now());
+  }
+}
+
+void fmt_format_chrono(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = fmt::format("{}", std::chrono::system_clock::now());
+  }
+}
+
+} // namespace
+
+BENCHMARK(imp_fmt_string);
+BENCHMARK(fmt_format_string);
+BENCHMARK(imp_fmt_int);
+BENCHMARK(fmt_format_int);
+BENCHMARK(imp_fmt_float);
+BENCHMARK(fmt_format_float);
+BENCHMARK(imp_fmt_chrono);
+BENCHMARK(fmt_format_chrono);
diff --git a/benchmark/benchmark_log.cpp b/benchmark/benchmark_log.cpp
index e7db3623..9f5fe09a 100644
--- a/benchmark/benchmark_log.cpp
+++ b/benchmark/benchmark_log.cpp
@@ -5,14 +5,14 @@
 
 namespace {
 
-void BM_imp_log_no_output(benchmark::State& state) {
+void imp_log_no_output(benchmark::State &state) {
   imp::log::grip log {__func__, {}};
   for (auto _ : state) {
     log.debug("hello log.");
   }
 }
 
-void BM_imp_log_gripper(benchmark::State& state) {
+void imp_log_gripper(benchmark::State &state) {
   imp::log::grip log {__func__, {}};
   for (auto _ : state) {
     log.info("hello log.");
@@ -21,5 +21,5 @@ void BM_imp_log_gripper(benchmark::State& state) {
 
 } // namespace
 
-BENCHMARK(BM_imp_log_no_output);
-BENCHMARK(BM_imp_log_gripper);
\ No newline at end of file
+BENCHMARK(imp_log_no_output);
+BENCHMARK(imp_log_gripper);
\ No newline at end of file
diff --git a/include/libimp/fmt.h b/include/libimp/fmt.h
index 67f32ccc..89dc7b7d 100644
--- a/include/libimp/fmt.h
+++ b/include/libimp/fmt.h
@@ -3,6 +3,9 @@
  * @author mutouyun (orz@orzz.org)
  * @brief String formatting.
  * @date 2022-11-26
+ * 
+ * @remarks The current performance is not high, 
+ * because I use std::sprintf directly for formatting for convenience.
  */
 #pragma once
 
@@ -11,7 +14,7 @@
 #include <type_traits>
 #include <chrono>   // std::chrono::time_point
 #include <cstddef>
-#include <ctime>    // std::tm
+#include <ctime>    // std::tm, std::localtime
 
 #include "libimp/def.h"
 #include "libimp/fmt_cpo.h"
@@ -21,12 +24,23 @@
 
 LIBIMP_NAMESPACE_BEG_
 
+/**
+ * @brief The format string reference wrapper.
+ */
 template <typename T>
 struct fmt_ref {
   span<char const> fstr;
   T param;
 };
 
+/**
+ * @brief Conversion specifiers.
+ * 
+ * @remarks Just like printf, the format string is of the form
+ * [flags][field_width][.precision][conversion_character]
+ * 
+ * @see http://personal.ee.surrey.ac.uk/Personal/R.Bowden/C/printf.html
+ */
 template <std::size_t N>
 auto spec(char const (&fstr)[N]) noexcept {
   return [&fstr](auto &&arg) noexcept {
@@ -35,9 +49,16 @@ auto spec(char const (&fstr)[N]) noexcept {
   };
 }
 
-template <typename... A>
-std::string fmt(A &&...args) {
-  std::string joined;
+/// @brief String formatting function.
+
+template <typename A>
+std::string fmt(A &&a) {
+  return fmt_to_string(std::forward<A>(a));
+}
+
+template <typename A1, typename... A>
+std::string fmt(A1 &&a1, A &&...args) {
+  std::string joined(fmt(std::forward<A1>(a1)));
   LIBIMP_UNUSED auto unfold = {
     joined.append(fmt_to_string(std::forward<A>(args)))...
   };
@@ -45,24 +66,26 @@ std::string fmt(A &&...args) {
 }
 
 /// @brief Return the string directly.
-LIBIMP_EXPORT std::string to_string(std::string const &a) noexcept;
-LIBIMP_EXPORT std::string to_string(std::string &&a) noexcept;
-LIBIMP_EXPORT std::string to_string(std::string const &a, span<char const> fstr) noexcept;
+inline char const *to_string(char const *a) noexcept { return (a == nullptr) ? "" : a; }
+template <std::size_t N>
+inline char const *to_string(char const (&a)[N]) noexcept { return a; }
+inline std::string to_string(std::string const &a) noexcept { return a; }
+inline std::string to_string(std::string &&a) noexcept { return std::move(a); }
+LIBIMP_EXPORT std::string to_string(char const *a, span<char const> fstr) noexcept;
+inline std::string to_string(std::string const &a, span<char const> fstr) noexcept { return to_string(a.c_str(), fstr); }
 
 /// @brief Character to string conversion.
 /// @return an empty string if the conversion fails
-LIBIMP_EXPORT std::string to_string(char a) noexcept;
+inline std::string to_string(char a) noexcept { return {a}; }
 LIBIMP_EXPORT std::string to_string(wchar_t a) noexcept;
 LIBIMP_EXPORT std::string to_string(char16_t a) noexcept;
 LIBIMP_EXPORT std::string to_string(char32_t a) noexcept;
 #if defined(LIBIMP_CPP_20)
-LIBIMP_EXPORT std::string to_string(char8_t a) noexcept;
+LIBIMP_EXPORT std::string to_string(char8_t a) noexcept { return to_string((char)a); }
 #endif // defined(LIBIMP_CPP_20)
 
 /// @brief Conversion of numeric types to strings.
 /// @return an empty string if the conversion fails
-LIBIMP_EXPORT std::string to_string(signed char a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(unsigned char a, span<char const> fstr = {}) noexcept;
 LIBIMP_EXPORT std::string to_string(signed short a, span<char const> fstr = {}) noexcept;
 LIBIMP_EXPORT std::string to_string(unsigned short a, span<char const> fstr = {}) noexcept;
 LIBIMP_EXPORT std::string to_string(signed int a, span<char const> fstr = {}) noexcept;
@@ -71,26 +94,47 @@ LIBIMP_EXPORT std::string to_string(signed long a, span<char const> fstr = {}) n
 LIBIMP_EXPORT std::string to_string(unsigned long a, span<char const> fstr = {}) noexcept;
 LIBIMP_EXPORT std::string to_string(signed long long a, span<char const> fstr = {}) noexcept;
 LIBIMP_EXPORT std::string to_string(unsigned long long a, span<char const> fstr = {}) noexcept;
+inline std::string to_string(  signed char a, span<char const> fstr = {}) noexcept { return to_string(     (int)a, fstr); }
+inline std::string to_string(unsigned char a, span<char const> fstr = {}) noexcept { return to_string((unsigned)a, fstr); }
 
 /// @brief Conversion of floating point type to strings.
 /// @return an empty string if the conversion fails
-LIBIMP_EXPORT std::string to_string(float a, span<char const> fstr = {}) noexcept;
 LIBIMP_EXPORT std::string to_string(double a, span<char const> fstr = {}) noexcept;
 LIBIMP_EXPORT std::string to_string(long double a, span<char const> fstr = {}) noexcept;
+inline std::string to_string(float a, span<char const> fstr = {}) noexcept { return to_string((double)a, fstr); }
 
 /// @brief Pointer.
-LIBIMP_EXPORT std::string to_string(std::nullptr_t) noexcept;
+inline std::string to_string(std::nullptr_t) noexcept { return "null"; }
 template <typename T,
           typename = std::enable_if_t<std::is_same<T, void>::value>>
 LIBIMP_EXPORT std::string to_string(T const volatile *a) noexcept;
 
 /// @brief Date and time.
 LIBIMP_EXPORT std::string to_string(std::tm const &a, span<char const> fstr = {}) noexcept;
+
 namespace detail {
-LIBIMP_EXPORT std::string time_to_string(std::time_t tt, span<char const> fstr) noexcept;
+
+/**
+ * @brief Convert std::time_t to std::string.
+ * @return an empty string if the conversion fails
+ */
+inline std::string time_to_string(std::time_t tt, span<char const> fstr) noexcept {
+#if defined(LIBIMP_CC_MSVC)
+  /// @see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/localtime-s-localtime32-s-localtime64-s
+  std::tm tm {};
+  if (::localtime_s(&tm, &tt) != 0) {
+    return {};
+  }
+  return to_string(tm, fstr);
+#else
+  return to_string(*std::localtime(&tt), fstr);
+#endif
+}
+
 } // namespace detail
+
 template <class Clock, class Duration>
-LIBIMP_EXPORT std::string to_string(std::chrono::time_point<Clock, Duration> const &a, span<char const> fstr = {}) noexcept {
+std::string to_string(std::chrono::time_point<Clock, Duration> const &a, span<char const> fstr = {}) noexcept {
   return detail::time_to_string(std::chrono::system_clock::to_time_t(a), fstr);
 }
 
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index 613f3ad0..5a5a8e13 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -1,4 +1,3 @@
-#define _CRT_SECURE_NO_WARNINGS
 #include "libimp/fmt.h"
 
 #include <cstdio>   // std::snprintf
@@ -98,21 +97,9 @@ std::string sprintf(F fop, span<char const> fstr, span<char const> s, A a) noexc
 
 } // namespace
 
-std::string to_string(std::string const &a) noexcept {
-  return a;
-}
-
-std::string to_string(std::string &&a) noexcept {
-  return std::move(a);
-}
-
-std::string to_string(std::string const &a, span<char const> fstr) noexcept {
-  if (a.empty()) return {};
-  return ::LIBIMP::sprintf(fmt_of, fstr, "s", a.c_str());
-}
-
-std::string to_string(char a) noexcept {
-  return {a};
+std::string to_string(char const *a, span<char const> fstr) noexcept {
+  if (a == nullptr) return {};
+  return ::LIBIMP::sprintf(fmt_of, fstr, "s", a);
 }
 
 std::string to_string(wchar_t a) noexcept {
@@ -145,20 +132,6 @@ std::string to_string(char32_t a) noexcept {
   }
 }
 
-#if defined(LIBIMP_CPP_20)
-std::string to_string(char8_t a) noexcept {
-  return to_string((char)a);
-}
-#endif // defined(LIBIMP_CPP_20)
-
-std::string to_string(signed char a, span<char const> fstr) noexcept {
-  return to_string((int)a, fstr);
-}
-
-std::string to_string(unsigned char a, span<char const> fstr) noexcept {
-  return to_string((unsigned)a, fstr);
-}
-
 std::string to_string(signed short a, span<char const> fstr) noexcept {
   return ::LIBIMP::sprintf(fmt_of_signed, fstr, "h", a);
 }
@@ -191,10 +164,6 @@ std::string to_string(unsigned long long a, span<char const> fstr) noexcept {
   return ::LIBIMP::sprintf(fmt_of_unsigned, fstr, "ll", a);
 }
 
-std::string to_string(float a, span<char const> fstr) noexcept {
-  return to_string((double)a, fstr);
-}
-
 std::string to_string(double a, span<char const> fstr) noexcept {
   return ::LIBIMP::sprintf(fmt_of_float, fstr, "", a);
 }
@@ -203,10 +172,6 @@ std::string to_string(long double a, span<char const> fstr) noexcept {
   return ::LIBIMP::sprintf(fmt_of_float, fstr, "L", a);
 }
 
-std::string to_string(std::nullptr_t) noexcept {
-  return "null";
-}
-
 template <>
 std::string to_string<void, void>(void const volatile *a) noexcept {
   if (a == nullptr) {
@@ -228,12 +193,4 @@ std::string to_string(std::tm const &a, span<char const> fstr) noexcept {
   }
 }
 
-namespace detail {
-
-std::string time_to_string(std::time_t tt, span<char const> fstr) noexcept {
-  return to_string(*std::localtime(&tt), fstr);
-}
-
-} // namespace detail
-
 LIBIMP_NAMESPACE_END_

From a2dfde6a63d23a279b11c3e575b847d292f6e788 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 3 Dec 2022 16:29:39 +0800
Subject: [PATCH 120/272] upd: [imp] add nodiscard for fmt

---
 benchmark/benchmark_fmt.cpp | 8 ++++----
 include/libimp/fmt.h        | 4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/benchmark/benchmark_fmt.cpp b/benchmark/benchmark_fmt.cpp
index 0693203d..5203c3ff 100644
--- a/benchmark/benchmark_fmt.cpp
+++ b/benchmark/benchmark_fmt.cpp
@@ -11,7 +11,7 @@ namespace {
 
 void imp_fmt_string(benchmark::State &state) {
   for (auto _ : state) {
-    imp::fmt("hello world. hello world. hello world. hello world. hello world.");
+    std::ignore = imp::fmt("hello world. hello world. hello world. hello world. hello world.");
   }
 }
 
@@ -23,7 +23,7 @@ void fmt_format_string(benchmark::State &state) {
 
 void imp_fmt_int(benchmark::State &state) {
   for (auto _ : state) {
-    imp::fmt(654321);
+    std::ignore = imp::fmt(654321);
   }
 }
 
@@ -35,7 +35,7 @@ void fmt_format_int(benchmark::State &state) {
 
 void imp_fmt_float(benchmark::State &state) {
   for (auto _ : state) {
-    imp::fmt(654.321);
+    std::ignore = imp::fmt(654.321);
   }
 }
 
@@ -47,7 +47,7 @@ void fmt_format_float(benchmark::State &state) {
 
 void imp_fmt_chrono(benchmark::State &state) {
   for (auto _ : state) {
-    imp::fmt(std::chrono::system_clock::now());
+    std::ignore = imp::fmt(std::chrono::system_clock::now());
   }
 }
 
diff --git a/include/libimp/fmt.h b/include/libimp/fmt.h
index 89dc7b7d..26f37a38 100644
--- a/include/libimp/fmt.h
+++ b/include/libimp/fmt.h
@@ -52,12 +52,12 @@ auto spec(char const (&fstr)[N]) noexcept {
 /// @brief String formatting function.
 
 template <typename A>
-std::string fmt(A &&a) {
+LIBIMP_NODISCARD std::string fmt(A &&a) {
   return fmt_to_string(std::forward<A>(a));
 }
 
 template <typename A1, typename... A>
-std::string fmt(A1 &&a1, A &&...args) {
+LIBIMP_NODISCARD std::string fmt(A1 &&a1, A &&...args) {
   std::string joined(fmt(std::forward<A1>(a1)));
   LIBIMP_UNUSED auto unfold = {
     joined.append(fmt_to_string(std::forward<A>(args)))...

From f2e981c5384dfa9413c795ea7bedc4903b90adc6 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 3 Dec 2022 16:53:02 +0800
Subject: [PATCH 121/272] upd: [imp] optimizes two formatting operations for
 short strings for fmt

---
 include/libimp/fmt.h      | 2 --
 src/libimp/fmt.cpp        | 6 +++++-
 test/imp/test_imp_fmt.cpp | 4 ++--
 3 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/include/libimp/fmt.h b/include/libimp/fmt.h
index 26f37a38..dcaa3296 100644
--- a/include/libimp/fmt.h
+++ b/include/libimp/fmt.h
@@ -67,8 +67,6 @@ LIBIMP_NODISCARD std::string fmt(A1 &&a1, A &&...args) {
 
 /// @brief Return the string directly.
 inline char const *to_string(char const *a) noexcept { return (a == nullptr) ? "" : a; }
-template <std::size_t N>
-inline char const *to_string(char const (&a)[N]) noexcept { return a; }
 inline std::string to_string(std::string const &a) noexcept { return a; }
 inline std::string to_string(std::string &&a) noexcept { return std::move(a); }
 LIBIMP_EXPORT std::string to_string(char const *a, span<char const> fstr) noexcept;
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index 5a5a8e13..6177a6b8 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -74,8 +74,12 @@ std::string fmt_of_float(span<char const> fstr, span<char const> l) {
 
 template <typename A /*a fundamental or pointer type*/>
 std::string sprintf(std::string const &sfmt, A a) {
-  auto sz = std::snprintf(nullptr, 0, sfmt.c_str(), a);
+  char sbuf[2048];
+  auto sz = std::snprintf(sbuf, sizeof(sbuf), sfmt.c_str(), a);
   if (sz <= 0) return {};
+  if (sz < sizeof(sbuf)) {
+    return sbuf;
+  }
   std::string des;
   des.resize(sz + 1);
   if (std::snprintf(&des[0], des.size(), sfmt.c_str(), a) < 0) {
diff --git a/test/imp/test_imp_fmt.cpp b/test/imp/test_imp_fmt.cpp
index 234dfc4c..0f3ee95e 100644
--- a/test/imp/test_imp_fmt.cpp
+++ b/test/imp/test_imp_fmt.cpp
@@ -14,8 +14,8 @@ TEST(fmt, operator) {
 
 TEST(fmt, to_string) {
   /// @brief string
-  EXPECT_EQ(imp::to_string(""), "");
-  EXPECT_EQ(imp::to_string("%what%"), "%what%");
+  EXPECT_STREQ(imp::to_string(""), "");
+  EXPECT_STREQ(imp::to_string("%what%"), "%what%");
   EXPECT_EQ(imp::to_string("%what%", "10") , "    %what%");
   EXPECT_EQ(imp::to_string("%what%", "-10"), "%what%    ");
 

From d258e007105d8f67f891ca6e6c9f48b5e0ed8939 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 3 Dec 2022 17:59:03 +0800
Subject: [PATCH 122/272] upd: [imp] fmt performance optimization

---
 src/libimp/fmt.cpp | 79 ++++++++++++++++++++++++++++++++--------------
 1 file changed, 56 insertions(+), 23 deletions(-)

diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index 6177a6b8..f565d174 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -1,8 +1,12 @@
 #include "libimp/fmt.h"
 
-#include <cstdio>   // std::snprintf
-#include <iomanip>  // std::put_time
-#include <sstream>  // std::ostringstream
+#include <cstdio>     // std::snprintf
+#include <iomanip>    // std::put_time
+#include <sstream>    // std::ostringstream
+#include <array>
+#include <cstring>    // std::memcpy, std::strncat
+#include <algorithm>  // std::min
+#include <initializer_list>
 
 #include "libimp/codecvt.h"
 
@@ -20,17 +24,46 @@ span<char const> normalize(span<char const> a) {
   return a.first(a.size() - (a.back() == '\0' ? 1 : 0));
 }
 
-std::string as_string(span<char const> a) {
-  if (a.empty()) return {};
+span<char> smem_cpy(span<char> sbuf, span<char const> a) noexcept {
+  if (sbuf.empty()) return {};
   a = normalize(a);
-  return std::string(a.data(), a.size());
+  auto sz = (std::min)(sbuf.size() - 1, a.size());
+  if (sz != 0) std::memcpy(sbuf.data(), a.data(), sz);
+  return sbuf.first(sz);
+}
+
+span<char> sbuf_cpy(span<char> sbuf, span<char const> a) noexcept {
+  sbuf = smem_cpy(sbuf, a);
+  *sbuf.end() = '\0';
+  return sbuf;
+}
+
+span<char> sbuf_cat(span<char> sbuf, std::initializer_list<span<char const>> args) noexcept {
+  std::size_t remain = sbuf.size();
+  for (auto s : args) {
+    remain -= smem_cpy(sbuf.last(remain), s).size();
+  }
+  auto sz = sbuf.size() - remain;
+  sbuf[sz] = '\0';
+  return sbuf.first(sz);
+}
+
+span<char> local_fmt_str() noexcept {
+  thread_local std::array<char, 512> sbuf;
+  return sbuf;
+}
+
+char const *as_cstr(span<char const> a) {
+  if (a.empty()) return "";
+  if (a.back() == '\0') return a.data();
+  return sbuf_cpy(local_fmt_str(), a).data();
 }
 
-std::string fmt_of(span<char const> fstr, span<char const> s) {
-  return '%' + as_string(fstr) + as_string(s);
+span<char> fmt_of(span<char const> fstr, span<char const> s) {
+  return sbuf_cat(local_fmt_str(), {"%", fstr, s});
 }
 
-std::string fmt_of_unsigned(span<char const> fstr, span<char const> l) {
+span<char> fmt_of_unsigned(span<char const> fstr, span<char const> l) {
   if (fstr.empty()) {
     return fmt_of(l, "u");
   }
@@ -39,12 +72,12 @@ std::string fmt_of_unsigned(span<char const> fstr, span<char const> l) {
     case 'o':
     case 'x':
     case 'X':
-    case 'u': return fmt_of(fstr.first(fstr.size() - 1), l) + fstr.back();
-    default : return fmt_of(fstr, l) + 'u';
+    case 'u': return sbuf_cat(local_fmt_str(), {"%", fstr.first(fstr.size() - 1), l, fstr.last(1)});
+    default : return sbuf_cat(local_fmt_str(), {"%", fstr, l, "u"});
   }
 }
 
-std::string fmt_of_signed(span<char const> fstr, span<char const> l) {
+span<char> fmt_of_signed(span<char const> fstr, span<char const> l) {
   if (fstr.empty()) {
     return fmt_of(l, "d");
   }
@@ -54,11 +87,11 @@ std::string fmt_of_signed(span<char const> fstr, span<char const> l) {
     case 'x':
     case 'X':
     case 'u': return fmt_of_unsigned(fstr, l);
-    default : return fmt_of(fstr, l) + 'd';
+    default : return sbuf_cat(local_fmt_str(), {"%", fstr, l, "d"});
   }
 }
 
-std::string fmt_of_float(span<char const> fstr, span<char const> l) {
+span<char> fmt_of_float(span<char const> fstr, span<char const> l) {
   if (fstr.empty()) {
     return fmt_of(l, "f");
   }
@@ -67,22 +100,22 @@ std::string fmt_of_float(span<char const> fstr, span<char const> l) {
     case 'e':
     case 'E':
     case 'g':
-    case 'G': return fmt_of(fstr.first(fstr.size() - 1), l) + fstr.back();
-    default : return fmt_of(fstr, l) + 'f';
+    case 'G': return sbuf_cat(local_fmt_str(), {"%", fstr.first(fstr.size() - 1), l, fstr.last(1)});
+    default : return sbuf_cat(local_fmt_str(), {"%", fstr, l, "f"});
   }
 }
 
 template <typename A /*a fundamental or pointer type*/>
-std::string sprintf(std::string const &sfmt, A a) {
-  char sbuf[2048];
-  auto sz = std::snprintf(sbuf, sizeof(sbuf), sfmt.c_str(), a);
+std::string sprintf(span<char const> sfmt, A a) {
+  std::array<char, 512> sbuf;
+  auto sz = std::snprintf(sbuf.data(), sbuf.size(), sfmt.data(), a);
   if (sz <= 0) return {};
-  if (sz < sizeof(sbuf)) {
-    return sbuf;
+  if (sz < sbuf.size()) {
+    return std::string(sbuf.data(), sz);
   }
   std::string des;
   des.resize(sz + 1);
-  if (std::snprintf(&des[0], des.size(), sfmt.c_str(), a) < 0) {
+  if (std::snprintf(&des[0], des.size(), sfmt.data(), a) < 0) {
     return {};
   }
   des.pop_back(); // remove the terminated null character
@@ -190,7 +223,7 @@ std::string to_string(std::tm const &a, span<char const> fstr) noexcept {
   }
   LIBIMP_TRY {
     std::ostringstream ss;
-    ss << std::put_time(&a, as_string(fstr).c_str());
+    ss << std::put_time(&a, as_cstr(fstr));
     return ss.str();
   } LIBIMP_CATCH(...) {
     return {};

From c39b0fc18cca37bd4f061be2edfc3af2689f1e86 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 3 Dec 2022 18:13:10 +0800
Subject: [PATCH 123/272] upd: ut

---
 src/libimp/fmt.cpp        |  2 +-
 test/imp/test_imp_fmt.cpp | 17 ++++++++++++++++-
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index f565d174..cb680d5e 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -4,7 +4,7 @@
 #include <iomanip>    // std::put_time
 #include <sstream>    // std::ostringstream
 #include <array>
-#include <cstring>    // std::memcpy, std::strncat
+#include <cstring>    // std::memcpy
 #include <algorithm>  // std::min
 #include <initializer_list>
 
diff --git a/test/imp/test_imp_fmt.cpp b/test/imp/test_imp_fmt.cpp
index 0f3ee95e..83df1c0e 100644
--- a/test/imp/test_imp_fmt.cpp
+++ b/test/imp/test_imp_fmt.cpp
@@ -5,7 +5,7 @@
 
 #include "libimp/fmt.h"
 
-TEST(fmt, operator) {
+TEST(fmt, spec) {
   EXPECT_STREQ(imp::spec("hello")(123).fstr.data(), "hello");
   EXPECT_EQ(imp::spec("hello")(123).param , 123);
   EXPECT_STREQ(imp::spec("hello")("world").fstr.data(), "hello");
@@ -81,4 +81,19 @@ TEST(fmt, fmt) {
   auto s = imp::fmt("hello", " ", "world", ".");
   EXPECT_EQ(s, "hello world.");
   std::cout << imp::fmt('[', std::chrono::system_clock::now(), "] ", s) << "\n";
+}
+
+namespace {
+
+class foo {};
+
+std::string tag_invoke(decltype(imp::fmt_to_string), foo arg) noexcept(false) {
+  throw arg;
+  return {};
+}
+
+} // namespace
+
+TEST(fmt, throw) {
+  EXPECT_THROW(imp::fmt(foo{}), foo);
 }
\ No newline at end of file

From 36b380f80fa1f8c4f8c0950d0e8206e9b36bedb7 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 3 Dec 2022 18:19:00 +0800
Subject: [PATCH 124/272] upd: alignment of format

---
 include/libimp/fmt.h | 42 +++++++++++++++++++++---------------------
 1 file changed, 21 insertions(+), 21 deletions(-)

diff --git a/include/libimp/fmt.h b/include/libimp/fmt.h
index dcaa3296..dbbb088d 100644
--- a/include/libimp/fmt.h
+++ b/include/libimp/fmt.h
@@ -66,40 +66,40 @@ LIBIMP_NODISCARD std::string fmt(A1 &&a1, A &&...args) {
 }
 
 /// @brief Return the string directly.
-inline char const *to_string(char const *a) noexcept { return (a == nullptr) ? "" : a; }
-inline std::string to_string(std::string const &a) noexcept { return a; }
-inline std::string to_string(std::string &&a) noexcept { return std::move(a); }
-LIBIMP_EXPORT std::string to_string(char const *a, span<char const> fstr) noexcept;
-inline std::string to_string(std::string const &a, span<char const> fstr) noexcept { return to_string(a.c_str(), fstr); }
+       inline char const *to_string(char const *       a) noexcept { return (a == nullptr) ? "" : a; }
+       inline std::string to_string(std::string const &a) noexcept { return a; }
+       inline std::string to_string(std::string &&     a) noexcept { return std::move(a); }
+LIBIMP_EXPORT std::string to_string(char const *       a, span<char const> fstr) noexcept;
+       inline std::string to_string(std::string const &a, span<char const> fstr) noexcept { return to_string(a.c_str(), fstr); }
 
 /// @brief Character to string conversion.
 /// @return an empty string if the conversion fails
-inline std::string to_string(char a) noexcept { return {a}; }
-LIBIMP_EXPORT std::string to_string(wchar_t a) noexcept;
-LIBIMP_EXPORT std::string to_string(char16_t a) noexcept;
-LIBIMP_EXPORT std::string to_string(char32_t a) noexcept;
+       inline std::string to_string(char     a) noexcept { return {a}; }
 #if defined(LIBIMP_CPP_20)
-LIBIMP_EXPORT std::string to_string(char8_t a) noexcept { return to_string((char)a); }
+       inline std::string to_string(char8_t  a) noexcept { return to_string((char)a); }
 #endif // defined(LIBIMP_CPP_20)
+LIBIMP_EXPORT std::string to_string(wchar_t  a) noexcept;
+LIBIMP_EXPORT std::string to_string(char16_t a) noexcept;
+LIBIMP_EXPORT std::string to_string(char32_t a) noexcept;
 
 /// @brief Conversion of numeric types to strings.
 /// @return an empty string if the conversion fails
-LIBIMP_EXPORT std::string to_string(signed short a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(unsigned short a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(signed int a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(unsigned int a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(signed long a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(unsigned long a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(signed long long a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(  signed short     a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(unsigned short     a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(  signed int       a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(unsigned int       a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(  signed long      a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(unsigned long      a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(  signed long long a, span<char const> fstr = {}) noexcept;
 LIBIMP_EXPORT std::string to_string(unsigned long long a, span<char const> fstr = {}) noexcept;
-inline std::string to_string(  signed char a, span<char const> fstr = {}) noexcept { return to_string(     (int)a, fstr); }
-inline std::string to_string(unsigned char a, span<char const> fstr = {}) noexcept { return to_string((unsigned)a, fstr); }
+       inline std::string to_string(  signed char      a, span<char const> fstr = {}) noexcept { return to_string(     (int)a, fstr); }
+       inline std::string to_string(unsigned char      a, span<char const> fstr = {}) noexcept { return to_string((unsigned)a, fstr); }
 
 /// @brief Conversion of floating point type to strings.
 /// @return an empty string if the conversion fails
-LIBIMP_EXPORT std::string to_string(double a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT std::string to_string(     double a, span<char const> fstr = {}) noexcept;
 LIBIMP_EXPORT std::string to_string(long double a, span<char const> fstr = {}) noexcept;
-inline std::string to_string(float a, span<char const> fstr = {}) noexcept { return to_string((double)a, fstr); }
+       inline std::string to_string(float       a, span<char const> fstr = {}) noexcept { return to_string((double)a, fstr); }
 
 /// @brief Pointer.
 inline std::string to_string(std::nullptr_t) noexcept { return "null"; }

From b687e27a0a4ac4244df42c9648a0d353178b9d49 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 4 Dec 2022 18:07:11 +0800
Subject: [PATCH 125/272] upd: [imp] fmt_context

---
 benchmark/benchmark_fmt.cpp  |  49 +++++++-
 include/libimp/byte.h        |  10 +-
 include/libimp/fmt.h         | 120 ++++++++++----------
 include/libimp/fmt_cpo.h     |  52 ++++++++-
 include/libimp/log.h         |   7 +-
 include/libimp/result.h      |  10 +-
 include/libimp/span.h        |   2 +-
 include/libimp/system.h      |  12 +-
 src/libimp/fmt.cpp           | 211 ++++++++++++++++++++++++-----------
 src/libimp/log.cpp           |  21 +++-
 src/libimp/system.cpp        |   5 -
 test/imp/test_imp_fmt.cpp    | 111 ++++++++++--------
 test/imp/test_imp_system.cpp |   3 -
 13 files changed, 398 insertions(+), 215 deletions(-)

diff --git a/benchmark/benchmark_fmt.cpp b/benchmark/benchmark_fmt.cpp
index 5203c3ff..be39e1a8 100644
--- a/benchmark/benchmark_fmt.cpp
+++ b/benchmark/benchmark_fmt.cpp
@@ -11,13 +11,26 @@ namespace {
 
 void imp_fmt_string(benchmark::State &state) {
   for (auto _ : state) {
-    std::ignore = imp::fmt("hello world. hello world. hello world. hello world. hello world.");
+    std::ignore = imp::fmt("hello world.hello world.hello world.hello world.hello world.");
+  }
+}
+
+void imp_fmt_multi_string(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = imp::fmt("hello world.", "hello world.", "hello world.", "hello world.", "hello world.");
   }
 }
 
 void fmt_format_string(benchmark::State &state) {
   for (auto _ : state) {
-    std::ignore = fmt::format("hello world. hello world. hello world. hello world. hello world.");
+    std::ignore = fmt::format("hello world.hello world.hello world.hello world.hello world.");
+  }
+}
+
+void fmt_format_multi_string(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = fmt::format("{}{}{}{}{}", 
+                              "hello world.", " hello world.", " hello world.", " hello world.", " hello world.");
   }
 }
 
@@ -27,24 +40,48 @@ void imp_fmt_int(benchmark::State &state) {
   }
 }
 
+void imp_fmt_multi_int(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = imp::fmt(654321, 654321, 654321, 654321, 654321);
+  }
+}
+
 void fmt_format_int(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = fmt::format("{}", 654321);
   }
 }
 
+void fmt_format_multi_int(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = fmt::format("{}{}{}{}{}", 654321, 654321, 654321, 654321, 654321);
+  }
+}
+
 void imp_fmt_float(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = imp::fmt(654.321);
   }
 }
 
+void imp_fmt_multi_float(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = imp::fmt(654.321, 654.321, 654.321, 654.321, 654.321);
+  }
+}
+
 void fmt_format_float(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = fmt::format("{}", 654.321);
   }
 }
 
+void fmt_format_multi_float(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = fmt::format("{}{}{}{}{}", 654.321, 654.321, 654.321, 654.321, 654.321);
+  }
+}
+
 void imp_fmt_chrono(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = imp::fmt(std::chrono::system_clock::now());
@@ -65,5 +102,13 @@ BENCHMARK(imp_fmt_int);
 BENCHMARK(fmt_format_int);
 BENCHMARK(imp_fmt_float);
 BENCHMARK(fmt_format_float);
+
+BENCHMARK(imp_fmt_multi_string);
+BENCHMARK(fmt_format_multi_string);
+BENCHMARK(imp_fmt_multi_int);
+BENCHMARK(fmt_format_multi_int);
+BENCHMARK(imp_fmt_multi_float);
+BENCHMARK(fmt_format_multi_float);
+
 BENCHMARK(imp_fmt_chrono);
 BENCHMARK(fmt_format_chrono);
diff --git a/include/libimp/byte.h b/include/libimp/byte.h
index 5bf2b6c5..88b43a0a 100644
--- a/include/libimp/byte.h
+++ b/include/libimp/byte.h
@@ -164,17 +164,17 @@ auto as_bytes(span<T> s) noexcept -> span<Byte> {
   return {byte_cast(s.data()), s.size_bytes()};
 }
 
-/// @brief Custom defined fmt_to_string method for imp::fmt
+/// @brief Custom defined fmt_to method for imp::fmt
 namespace detail {
 
-inline std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), ::LIBIMP::byte b) {
-  return ::LIBIMP::to_string(static_cast<std::uint8_t>(b), "02x");
+inline bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, ::LIBIMP::byte b) {
+  return ::LIBIMP::to_string(ctx, static_cast<std::uint8_t>(b), "02x");
 }
 
 template <typename T, 
           typename = std::enable_if_t<std::is_same<std::decay_t<T>, ::LIBIMP::byte>::value>>
-std::string tag_invoke(fmt_to_string_t, fmt_ref<T> arg) noexcept {
-  return ::LIBIMP::to_string(static_cast<std::uint8_t>(arg.param), arg.fstr);
+bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, fmt_ref<T> arg) noexcept {
+  return ::LIBIMP::to_string(ctx, static_cast<std::uint8_t>(arg.param), arg.fstr);
 }
 
 } // namespace detail
diff --git a/include/libimp/fmt.h b/include/libimp/fmt.h
index dbbb088d..fe901dc7 100644
--- a/include/libimp/fmt.h
+++ b/include/libimp/fmt.h
@@ -49,66 +49,62 @@ auto spec(char const (&fstr)[N]) noexcept {
   };
 }
 
-/// @brief String formatting function.
-
-template <typename A>
-LIBIMP_NODISCARD std::string fmt(A &&a) {
-  return fmt_to_string(std::forward<A>(a));
-}
-
-template <typename A1, typename... A>
-LIBIMP_NODISCARD std::string fmt(A1 &&a1, A &&...args) {
-  std::string joined(fmt(std::forward<A1>(a1)));
-  LIBIMP_UNUSED auto unfold = {
-    joined.append(fmt_to_string(std::forward<A>(args)))...
-  };
-  return joined;
+/**
+ * @brief String formatting function.
+ * 
+ * @param args arguments that support the fmt output
+ * @return an empty string if the fmt output fails 
+ */
+template <typename... A>
+LIBIMP_NODISCARD std::string fmt(A &&...args) {
+  std::string joined;
+  fmt_context ctx(joined);
+  if (fmt_to(ctx, std::forward<A>(args)...)) {
+    return ctx.finish() ? joined : "";
+  }
+  return {};
 }
 
-/// @brief Return the string directly.
-       inline char const *to_string(char const *       a) noexcept { return (a == nullptr) ? "" : a; }
-       inline std::string to_string(std::string const &a) noexcept { return a; }
-       inline std::string to_string(std::string &&     a) noexcept { return std::move(a); }
-LIBIMP_EXPORT std::string to_string(char const *       a, span<char const> fstr) noexcept;
-       inline std::string to_string(std::string const &a, span<char const> fstr) noexcept { return to_string(a.c_str(), fstr); }
+/// @brief String types.
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, char const *       a) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, std::string const &a) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, char const *       a, span<char const> fstr) noexcept;
+       inline bool to_string(fmt_context &ctx, std::string const &a, span<char const> fstr) noexcept { return to_string(ctx, a.c_str(), fstr); }
 
 /// @brief Character to string conversion.
-/// @return an empty string if the conversion fails
-       inline std::string to_string(char     a) noexcept { return {a}; }
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, char     a) noexcept;
 #if defined(LIBIMP_CPP_20)
-       inline std::string to_string(char8_t  a) noexcept { return to_string((char)a); }
+       inline bool to_string(fmt_context &ctx, char8_t  a) noexcept { return to_string(ctx, (char)a); }
 #endif // defined(LIBIMP_CPP_20)
-LIBIMP_EXPORT std::string to_string(wchar_t  a) noexcept;
-LIBIMP_EXPORT std::string to_string(char16_t a) noexcept;
-LIBIMP_EXPORT std::string to_string(char32_t a) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, wchar_t  a) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, char16_t a) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, char32_t a) noexcept;
 
 /// @brief Conversion of numeric types to strings.
-/// @return an empty string if the conversion fails
-LIBIMP_EXPORT std::string to_string(  signed short     a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(unsigned short     a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(  signed int       a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(unsigned int       a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(  signed long      a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(unsigned long      a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(  signed long long a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(unsigned long long a, span<char const> fstr = {}) noexcept;
-       inline std::string to_string(  signed char      a, span<char const> fstr = {}) noexcept { return to_string(     (int)a, fstr); }
-       inline std::string to_string(unsigned char      a, span<char const> fstr = {}) noexcept { return to_string((unsigned)a, fstr); }
+LIBIMP_EXPORT bool to_string(fmt_context &ctx,   signed short     a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, unsigned short     a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx,   signed int       a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, unsigned int       a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx,   signed long      a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, unsigned long      a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx,   signed long long a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, unsigned long long a, span<char const> fstr = {}) noexcept;
+       inline bool to_string(fmt_context &ctx,   signed char      a, span<char const> fstr = {}) noexcept { return to_string(ctx,      (int)a, fstr); }
+       inline bool to_string(fmt_context &ctx, unsigned char      a, span<char const> fstr = {}) noexcept { return to_string(ctx, (unsigned)a, fstr); }
 
 /// @brief Conversion of floating point type to strings.
-/// @return an empty string if the conversion fails
-LIBIMP_EXPORT std::string to_string(     double a, span<char const> fstr = {}) noexcept;
-LIBIMP_EXPORT std::string to_string(long double a, span<char const> fstr = {}) noexcept;
-       inline std::string to_string(float       a, span<char const> fstr = {}) noexcept { return to_string((double)a, fstr); }
+LIBIMP_EXPORT bool to_string(fmt_context &ctx,      double a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, long double a, span<char const> fstr = {}) noexcept;
+       inline bool to_string(fmt_context &ctx, float       a, span<char const> fstr = {}) noexcept { return to_string(ctx, (double)a, fstr); }
 
 /// @brief Pointer.
-inline std::string to_string(std::nullptr_t) noexcept { return "null"; }
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, std::nullptr_t) noexcept;
 template <typename T,
           typename = std::enable_if_t<std::is_same<T, void>::value>>
-LIBIMP_EXPORT std::string to_string(T const volatile *a) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, T const volatile *a) noexcept;
 
 /// @brief Date and time.
-LIBIMP_EXPORT std::string to_string(std::tm const &a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, std::tm const &a, span<char const> fstr = {}) noexcept;
 
 namespace detail {
 
@@ -116,53 +112,55 @@ namespace detail {
  * @brief Convert std::time_t to std::string.
  * @return an empty string if the conversion fails
  */
-inline std::string time_to_string(std::time_t tt, span<char const> fstr) noexcept {
+inline bool time_to_string(fmt_context &ctx, std::time_t tt, span<char const> fstr) noexcept {
 #if defined(LIBIMP_CC_MSVC)
   /// @see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/localtime-s-localtime32-s-localtime64-s
   std::tm tm {};
   if (::localtime_s(&tm, &tt) != 0) {
     return {};
   }
-  return to_string(tm, fstr);
+  return to_string(ctx, tm, fstr);
 #else
-  return to_string(*std::localtime(&tt), fstr);
+  return to_string(ctx, *std::localtime(&tt), fstr);
 #endif
 }
 
 } // namespace detail
 
 template <class Clock, class Duration>
-std::string to_string(std::chrono::time_point<Clock, Duration> const &a, span<char const> fstr = {}) noexcept {
-  return detail::time_to_string(std::chrono::system_clock::to_time_t(a), fstr);
+bool to_string(fmt_context &ctx, std::chrono::time_point<Clock, Duration> const &a, span<char const> fstr = {}) noexcept {
+  return detail::time_to_string(ctx, std::chrono::system_clock::to_time_t(a), fstr);
 }
 
 /**
- * @brief Predefined fmt_to_string method
+ * @brief Predefined fmt_to method
  */
 namespace detail {
 
 template <typename T>
-auto tag_invoke(fmt_to_string_t, T &&arg) noexcept
-  -> decltype(::LIBIMP::to_string(std::forward<T>(arg))) {
-  return ::LIBIMP::to_string(std::forward<T>(arg));
+auto tag_invoke(fmt_to_t, fmt_context &ctx, T &&arg) noexcept
+  -> decltype(::LIBIMP::to_string(ctx, std::forward<T>(arg))) {
+  return ::LIBIMP::to_string(ctx, std::forward<T>(arg));
 }
 
 template <typename T>
-auto tag_invoke(fmt_to_string_t, fmt_ref<T> arg) noexcept
-  -> decltype(::LIBIMP::to_string(static_cast<T>(arg.param), arg.fstr)) {
-  return ::LIBIMP::to_string(static_cast<T>(arg.param), arg.fstr);
+auto tag_invoke(fmt_to_t, fmt_context &ctx, fmt_ref<T> arg) noexcept
+  -> decltype(::LIBIMP::to_string(ctx, static_cast<T>(arg.param), arg.fstr)) {
+  return ::LIBIMP::to_string(ctx, static_cast<T>(arg.param), arg.fstr);
 }
 
 template <typename T>
-std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), span<T> s) {
+bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, span<T> s) {
   if (s.empty()) {
-    return {};
+    return false;
+  }
+  if (!fmt_to(ctx, s[0])) {
+    return false;
   }
-  auto appender = fmt(s[0]);
   for (std::size_t i = 1; i < s.size(); ++i) {
-    appender += fmt(' ', s[i]);
+    if (!fmt_to(ctx, ' ', s[i])) return false;
   }
-  return appender;
+  return true;
 }
 
 } // namespace detail
diff --git a/include/libimp/fmt_cpo.h b/include/libimp/fmt_cpo.h
index dd5bb288..48437f53 100644
--- a/include/libimp/fmt_cpo.h
+++ b/include/libimp/fmt_cpo.h
@@ -7,26 +7,66 @@
 #pragma once
 
 #include <string>
+#include <array>
+#include <cstddef>
 
 #include "libimp/def.h"
 #include "libimp/generic.h"
+#include "libimp/detect_plat.h"
+#include "libimp/span.h"
+#include "libimp/export.h"
 
 LIBIMP_NAMESPACE_BEG_
 
+constexpr std::size_t fmt_context_aligned_size = 512U;
+
+/**
+ * @brief The context of fmt.
+ */
+class LIBIMP_EXPORT fmt_context {
+  std::array<char, fmt_context_aligned_size> sbuf_;
+
+  std::string &joined_;
+  std::size_t  offset_;
+
+public:
+  fmt_context(std::string &j) noexcept;
+
+  std::size_t capacity() noexcept;
+  void reset() noexcept;
+  bool finish() noexcept;
+  bool resize(std::size_t sz) noexcept;
+  span<char> buffer() noexcept;
+  bool expend(std::size_t sz) noexcept;
+  bool append(std::string const &str) noexcept;
+};
+
 /**
- * @brief Supports custom fmt_to_string methods for imp::fmt.
+ * @brief Supports custom fmt_to methods for imp::fmt.
  */
 namespace detail {
 
-struct fmt_to_string_t {
-  template <typename T>
-  std::string operator()(T &&arg) const {
-    return ::LIBIMP::tag_invoke(fmt_to_string_t{}, std::forward<T>(arg));
+class fmt_to_t {
+  template <typename A1>
+  bool get_result(fmt_context &ctx, A1 && a1) const {
+    return ::LIBIMP::tag_invoke(fmt_to_t{}, ctx, std::forward<A1>(a1));
+  }
+
+  template <typename A1, typename... A>
+  bool get_result(fmt_context &ctx, A1 && a1, A &&...args) const {
+    return get_result(ctx, std::forward<A1>(a1))
+        && get_result(ctx, std::forward<A>(args)...);
+  }
+
+public:
+  template <typename... A>
+  bool operator()(fmt_context &ctx, A &&...args) const {
+    return get_result(ctx, std::forward<A>(args)...);
   }
 };
 
 } // namespace detail
 
-constexpr detail::fmt_to_string_t fmt_to_string {};
+constexpr detail::fmt_to_t fmt_to {};
 
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/log.h b/include/libimp/log.h
index 43924ba5..8e9c4913 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -37,11 +37,12 @@ struct context {
 };
 
 LIBIMP_EXPORT std::string to_string(context &&) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, context &&) noexcept;
 
-/// @brief Custom defined fmt_to_string method for imp::fmt
+/// @brief Custom defined fmt_to method for imp::fmt
 template <typename T>
-std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), context &&arg) noexcept {
-  return ::LIBIMP::log::to_string(std::move(arg));
+bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, context &&arg) noexcept {
+  return ::LIBIMP::log::to_string(ctx, std::move(arg));
 }
 
 } // namespace log
diff --git a/include/libimp/result.h b/include/libimp/result.h
index 158a519c..4aa87357 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -155,16 +155,16 @@ class result<T, DefTraits, std::enable_if_t<std::is_pointer<T>::value>> {
   friend bool operator!=(result const &lhs, result const &rhs) noexcept { return lhs.code_ != rhs.code_; }
 };
 
-/// @brief Custom defined fmt_to_string method for imp::fmt
+/// @brief Custom defined fmt_to method for imp::fmt
 namespace detail {
 
-inline std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), result_code r) {
-  return fmt("[", (r ? "succ" : "fail"), ", value = ", *r, "]");
+inline bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, result_code r) {
+  return fmt_to(ctx, "[", (r ? "succ" : "fail"), ", value = ", *r, "]");
 }
 
 template <typename T, typename D>
-std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), result<T, D> r) {
-  return fmt("[", (r ? "succ" : "fail"), ", value = ", result<T, D>::default_traits_t::format(r), "]");
+bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, result<T, D> r) {
+  return fmt_to(ctx, "[", (r ? "succ" : "fail"), ", value = ", result<T, D>::default_traits_t::format(r), "]");
 }
 
 } // namespace detail
diff --git a/include/libimp/span.h b/include/libimp/span.h
index fd25f494..7a781829 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -234,7 +234,7 @@ auto make_span(T (&arr)[E]) noexcept -> span<T> {
 }
 
 template <typename T, std::size_t E>
-auto make_span(std::array<T, E> const &arr) noexcept -> span<T> {
+auto make_span(std::array<T, E> &arr) noexcept -> span<T> {
   return {arr};
 }
 
diff --git a/include/libimp/system.h b/include/libimp/system.h
index 69ab783a..fd3edcf0 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -50,10 +50,8 @@ class LIBIMP_EXPORT error {
 
   std::string str() const noexcept;
 
-  friend bool operator==(error const &lhs, error const &rhs) noexcept;
-  friend bool operator!=(error const &lhs, error const &rhs) noexcept;
-
-  friend std::ostream &operator<<(std::ostream &o, error const &e);
+  friend LIBIMP_EXPORT bool operator==(error const &lhs, error const &rhs) noexcept;
+  friend LIBIMP_EXPORT bool operator!=(error const &lhs, error const &rhs) noexcept;
 };
 
 /**
@@ -65,10 +63,10 @@ enum class info : std::int32_t {
 LIBIMP_EXPORT result<std::int64_t> conf(info) noexcept;
 
 /**
- * @brief @brief Custom defined fmt_to_string method for imp::fmt
+ * @brief @brief Custom defined fmt_to method for imp::fmt
  */
-inline std::string tag_invoke(decltype(::LIBIMP::fmt_to_string), error r) noexcept {
-  return error_msg(r.code());
+inline bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, error r) noexcept {
+  return fmt_to(ctx, error_msg(r.code()));
 }
 
 } // namespace sys
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index cb680d5e..c2ba5029 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -19,12 +19,16 @@ LIBIMP_NAMESPACE_BEG_
  */
 namespace {
 
-span<char const> normalize(span<char const> a) {
+constexpr std::size_t roundup(std::size_t sz) noexcept {
+  return (sz & ~(fmt_context_aligned_size - 1)) + fmt_context_aligned_size;
+}
+
+span<char const> normalize(span<char const> const &a) {
   if (a.empty()) return {};
   return a.first(a.size() - (a.back() == '\0' ? 1 : 0));
 }
 
-span<char> smem_cpy(span<char> sbuf, span<char const> a) noexcept {
+span<char> smem_cpy(span<char> const &sbuf, span<char const> a) noexcept {
   if (sbuf.empty()) return {};
   a = normalize(a);
   auto sz = (std::min)(sbuf.size() - 1, a.size());
@@ -32,13 +36,13 @@ span<char> smem_cpy(span<char> sbuf, span<char const> a) noexcept {
   return sbuf.first(sz);
 }
 
-span<char> sbuf_cpy(span<char> sbuf, span<char const> a) noexcept {
+span<char> sbuf_cpy(span<char> sbuf, span<char const> const &a) noexcept {
   sbuf = smem_cpy(sbuf, a);
   *sbuf.end() = '\0';
   return sbuf;
 }
 
-span<char> sbuf_cat(span<char> sbuf, std::initializer_list<span<char const>> args) noexcept {
+span<char> sbuf_cat(span<char> const &sbuf, std::initializer_list<span<char const>> args) noexcept {
   std::size_t remain = sbuf.size();
   for (auto s : args) {
     remain -= smem_cpy(sbuf.last(remain), s).size();
@@ -49,21 +53,21 @@ span<char> sbuf_cat(span<char> sbuf, std::initializer_list<span<char const>> arg
 }
 
 span<char> local_fmt_str() noexcept {
-  thread_local std::array<char, 512> sbuf;
+  thread_local std::array<char, fmt_context_aligned_size> sbuf;
   return sbuf;
 }
 
-char const *as_cstr(span<char const> a) {
+char const *as_cstr(span<char const> const &a) {
   if (a.empty()) return "";
   if (a.back() == '\0') return a.data();
   return sbuf_cpy(local_fmt_str(), a).data();
 }
 
-span<char> fmt_of(span<char const> fstr, span<char const> s) {
+span<char> fmt_of(span<char const> const &fstr, span<char const> const &s) {
   return sbuf_cat(local_fmt_str(), {"%", fstr, s});
 }
 
-span<char> fmt_of_unsigned(span<char const> fstr, span<char const> l) {
+span<char> fmt_of_unsigned(span<char const> fstr, span<char const> const &l) {
   if (fstr.empty()) {
     return fmt_of(l, "u");
   }
@@ -77,7 +81,7 @@ span<char> fmt_of_unsigned(span<char const> fstr, span<char const> l) {
   }
 }
 
-span<char> fmt_of_signed(span<char const> fstr, span<char const> l) {
+span<char> fmt_of_signed(span<char const> fstr, span<char const> const &l) {
   if (fstr.empty()) {
     return fmt_of(l, "d");
   }
@@ -91,7 +95,7 @@ span<char> fmt_of_signed(span<char const> fstr, span<char const> l) {
   }
 }
 
-span<char> fmt_of_float(span<char const> fstr, span<char const> l) {
+span<char> fmt_of_float(span<char const> fstr, span<char const> const &l) {
   if (fstr.empty()) {
     return fmt_of(l, "f");
   }
@@ -106,125 +110,206 @@ span<char> fmt_of_float(span<char const> fstr, span<char const> l) {
 }
 
 template <typename A /*a fundamental or pointer type*/>
-std::string sprintf(span<char const> sfmt, A a) {
-  std::array<char, 512> sbuf;
-  auto sz = std::snprintf(sbuf.data(), sbuf.size(), sfmt.data(), a);
-  if (sz <= 0) return {};
-  if (sz < sbuf.size()) {
-    return std::string(sbuf.data(), sz);
-  }
-  std::string des;
-  des.resize(sz + 1);
-  if (std::snprintf(&des[0], des.size(), sfmt.data(), a) < 0) {
-    return {};
+int sprintf(fmt_context &ctx, span<char const> const &sfmt, A a) {
+  for (;;) {
+    auto sbuf = ctx.buffer();
+    auto sz = std::snprintf(sbuf.data(), sbuf.size(), sfmt.data(), a);
+    if (sz <= 0) {
+      return sz;
+    }
+    if (sz < sbuf.size()) {
+      return ctx.expend(sz) ? sz : -1;
+    }
+    if (!ctx.resize(sz + 1)) {
+      return -1;
+    }
   }
-  des.pop_back(); // remove the terminated null character
-  return des;
 }
 
 template <typename F /*a function pointer*/, 
           typename A /*a fundamental or pointer type*/>
-std::string sprintf(F fop, span<char const> fstr, span<char const> s, A a) noexcept {
+bool sprintf(fmt_context &ctx, F fop, span<char const> const &fstr, span<char const> const &s, A a) noexcept {
   LIBIMP_TRY {
-    return ::LIBIMP::sprintf(fop(fstr, s), a);
+    return ::LIBIMP::sprintf(ctx, fop(fstr, s), a) >= 0;
   } LIBIMP_CATCH(...) {
-    return {};
+    return false;
   }
 }
 
 } // namespace
 
-std::string to_string(char const *a, span<char const> fstr) noexcept {
-  if (a == nullptr) return {};
-  return ::LIBIMP::sprintf(fmt_of, fstr, "s", a);
+/// @brief The context of fmt.
+
+fmt_context::fmt_context(std::string &j) noexcept
+  : joined_(j)
+  , offset_(0) {}
+
+std::size_t fmt_context::capacity() noexcept {
+  return (offset_ < sbuf_.size()) ? sbuf_.size() : joined_.size();
 }
 
-std::string to_string(wchar_t a) noexcept {
+void fmt_context::reset() noexcept {
+  offset_ = 0;
+}
+
+bool fmt_context::finish() noexcept {
+  LIBIMP_TRY {
+    if (offset_ < sbuf_.size()) {
+      joined_.assign(sbuf_.data(), offset_);
+    } else {
+      joined_.resize(offset_);
+    }
+    return true;
+  } LIBIMP_CATCH(...) {
+    return false;
+  }
+}
+
+bool fmt_context::resize(std::size_t sz) noexcept {
+  LIBIMP_TRY {
+    if (sz < sbuf_.size()) {
+      return true;
+    }
+    joined_.resize(roundup(sz));
+    return true;
+  } LIBIMP_CATCH(...) {
+    return false;
+  }
+}
+
+span<char> fmt_context::buffer() noexcept {
+  if (offset_ < sbuf_.size()) {
+    return make_span(sbuf_).subspan(offset_);
+  } else {
+    return {&joined_[offset_], joined_.size() - offset_};
+  }
+}
+
+bool fmt_context::expend(std::size_t sz) noexcept {
+  if ((offset_ += sz) < sbuf_.size()) {
+    return true;
+  }
+  return (offset_ < joined_.size()) || resize(offset_);
+}
+
+bool fmt_context::append(std::string const &str) noexcept {
+  if ((buffer().size() < str.size()) && !resize(offset_ + str.size())) {
+    return false;
+  }
+  std::memcpy(buffer().data(), str.data(), str.size());
+  offset_ += str.size();
+  return true;
+}
+
+/// @brief To string conversion.
+
+bool to_string(fmt_context &ctx, char const *a) noexcept {
+  return to_string(ctx, a, {});
+}
+
+bool to_string(fmt_context &ctx, std::string const &a) noexcept {
+  return ctx.append(a);
+}
+
+bool to_string(fmt_context &ctx, char const *a, span<char const> fstr) noexcept {
+  if (a == nullptr) return false;
+  return ::LIBIMP::sprintf(ctx, fmt_of, fstr, "s", a);
+}
+
+bool to_string(fmt_context &ctx, char a) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of, {}, "c", a);
+}
+
+bool to_string(fmt_context &ctx, wchar_t a) noexcept {
   LIBIMP_TRY {
     std::string des;
     cvt_sstr(std::wstring{a}, des);
-    return des;
+    return ctx.append(des);
   } LIBIMP_CATCH(...) {
-    return {};
+    return false;
   }
 }
 
-std::string to_string(char16_t a) noexcept {
+bool to_string(fmt_context &ctx, char16_t a) noexcept {
   LIBIMP_TRY {
     std::string des;
     cvt_sstr(std::u16string{a}, des);
-    return des;
+    return ctx.append(des);
   } LIBIMP_CATCH(...) {
-    return {};
+    return false;
   }
 }
 
-std::string to_string(char32_t a) noexcept {
+bool to_string(fmt_context &ctx, char32_t a) noexcept {
   LIBIMP_TRY {
     std::string des;
     cvt_sstr(std::u32string{a}, des);
-    return des;
+    return ctx.append(des);
   } LIBIMP_CATCH(...) {
-    return {};
+    return false;
   }
 }
 
-std::string to_string(signed short a, span<char const> fstr) noexcept {
-  return ::LIBIMP::sprintf(fmt_of_signed, fstr, "h", a);
+bool to_string(fmt_context &ctx, signed short a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_signed, fstr, "h", a);
+}
+
+bool to_string(fmt_context &ctx, unsigned short a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_unsigned, fstr, "h", a);
 }
 
-std::string to_string(unsigned short a, span<char const> fstr) noexcept {
-  return ::LIBIMP::sprintf(fmt_of_unsigned, fstr, "h", a);
+bool to_string(fmt_context &ctx, signed int a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_signed, fstr, "", a);
 }
 
-std::string to_string(signed int a, span<char const> fstr) noexcept {
-  return ::LIBIMP::sprintf(fmt_of_signed, fstr, "", a);
+bool to_string(fmt_context &ctx, unsigned int a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_unsigned, fstr, "", a);
 }
 
-std::string to_string(unsigned int a, span<char const> fstr) noexcept {
-  return ::LIBIMP::sprintf(fmt_of_unsigned, fstr, "", a);
+bool to_string(fmt_context &ctx, signed long a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_signed, fstr, "l", a);
 }
 
-std::string to_string(signed long a, span<char const> fstr) noexcept {
-  return ::LIBIMP::sprintf(fmt_of_signed, fstr, "l", a);
+bool to_string(fmt_context &ctx, unsigned long a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_unsigned, fstr, "l", a);
 }
 
-std::string to_string(unsigned long a, span<char const> fstr) noexcept {
-  return ::LIBIMP::sprintf(fmt_of_unsigned, fstr, "l", a);
+bool to_string(fmt_context &ctx, signed long long a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_signed, fstr, "ll", a);
 }
 
-std::string to_string(signed long long a, span<char const> fstr) noexcept {
-  return ::LIBIMP::sprintf(fmt_of_signed, fstr, "ll", a);
+bool to_string(fmt_context &ctx, unsigned long long a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_unsigned, fstr, "ll", a);
 }
 
-std::string to_string(unsigned long long a, span<char const> fstr) noexcept {
-  return ::LIBIMP::sprintf(fmt_of_unsigned, fstr, "ll", a);
+bool to_string(fmt_context &ctx, double a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_float, fstr, "", a);
 }
 
-std::string to_string(double a, span<char const> fstr) noexcept {
-  return ::LIBIMP::sprintf(fmt_of_float, fstr, "", a);
+bool to_string(fmt_context &ctx, long double a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_float, fstr, "L", a);
 }
 
-std::string to_string(long double a, span<char const> fstr) noexcept {
-  return ::LIBIMP::sprintf(fmt_of_float, fstr, "L", a);
+bool to_string(fmt_context &ctx, std::nullptr_t) noexcept {
+  return ctx.append("null");
 }
 
 template <>
-std::string to_string<void, void>(void const volatile *a) noexcept {
+bool to_string<void, void>(fmt_context &ctx, void const volatile *a) noexcept {
   if (a == nullptr) {
-    return to_string(nullptr);
+    return to_string(ctx, nullptr);
   }
-  return ::LIBIMP::sprintf(fmt_of, "", "p", a);
+  return ::LIBIMP::sprintf(ctx, fmt_of, "", "p", a);
 }
 
-std::string to_string(std::tm const &a, span<char const> fstr) noexcept {
+bool to_string(fmt_context &ctx, std::tm const &a, span<char const> fstr) noexcept {
   if (fstr.empty()) {
     fstr = "%Y-%m-%d %H:%M:%S";
   }
   LIBIMP_TRY {
     std::ostringstream ss;
     ss << std::put_time(&a, as_cstr(fstr));
-    return ss.str();
+    return ctx.append(ss.str());
   } LIBIMP_CATCH(...) {
     return {};
   }
diff --git a/src/libimp/log.cpp b/src/libimp/log.cpp
index 925fc46a..3b68705a 100644
--- a/src/libimp/log.cpp
+++ b/src/libimp/log.cpp
@@ -6,17 +6,26 @@
 LIBIMP_NAMESPACE_BEG_
 namespace log {
 
-std::string to_string(context &&ctx) noexcept {
+bool to_string(fmt_context &f_ctx, context &&l_ctx) noexcept {
   constexpr static char types[] = {
     'T', 'D', 'I', 'W', 'E', 'F',
   };
   LIBIMP_TRY {
-    auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(ctx.tp).time_since_epoch().count() % 1000;
-    return fmt("[", types[enum_cast(ctx.level)], "][", ctx.tp, ".", spec("03")(ms), "][", ctx.func, "] ", ctx.text);
-  } LIBIMP_CATCH(std::exception const &e) {
-    /// @remark [TBD] std::string constructor may throw an exception
-    return e.what();
+    auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(l_ctx.tp).time_since_epoch().count() % 1000;
+    return fmt_to(f_ctx, "[", types[enum_cast(l_ctx.level)], "][", l_ctx.tp, ".", spec("03")(ms), "][", l_ctx.func, "] ", l_ctx.text);
+  } LIBIMP_CATCH(std::exception const &) {
+    return false;
+  }
+}
+
+std::string to_string(context &&ctx) noexcept {
+  std::string log_txt;
+  fmt_context f_ctx(log_txt);
+  if (!to_string(f_ctx, std::move(ctx))) {
+    return {};
   }
+  f_ctx.finish();
+  return log_txt;
 }
 
 printer::operator bool() const noexcept {
diff --git a/src/libimp/system.cpp b/src/libimp/system.cpp
index 43d39720..8dfb15de 100644
--- a/src/libimp/system.cpp
+++ b/src/libimp/system.cpp
@@ -49,10 +49,5 @@ bool operator!=(error const &lhs, error const &rhs) noexcept {
   return lhs.code() != rhs.code();
 }
 
-std::ostream &operator<<(std::ostream &o, error const &e) {
-  o << error_msg(e.code());
-  return o;
-}
-
 } // namespace sys
 LIBIMP_NAMESPACE_END_
diff --git a/test/imp/test_imp_fmt.cpp b/test/imp/test_imp_fmt.cpp
index 83df1c0e..faf2f196 100644
--- a/test/imp/test_imp_fmt.cpp
+++ b/test/imp/test_imp_fmt.cpp
@@ -1,5 +1,6 @@
 #define _CRT_SECURE_NO_WARNINGS
 #include <iostream>
+#include <tuple>
 
 #include "gtest/gtest.h"
 
@@ -13,68 +14,82 @@ TEST(fmt, spec) {
 }
 
 TEST(fmt, to_string) {
+  std::string joined;
+  imp::fmt_context ctx(joined);
+
   /// @brief string
-  EXPECT_STREQ(imp::to_string(""), "");
-  EXPECT_STREQ(imp::to_string("%what%"), "%what%");
-  EXPECT_EQ(imp::to_string("%what%", "10") , "    %what%");
-  EXPECT_EQ(imp::to_string("%what%", "-10"), "%what%    ");
+  EXPECT_TRUE(imp::to_string(ctx, "")); ctx.finish();
+  EXPECT_EQ(joined, "");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, "%what%")); ctx.finish();
+  EXPECT_EQ(joined, "%what%");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, "%what%", "10")); ctx.finish();
+  EXPECT_EQ(joined, "    %what%");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, "%what%", "-10")); ctx.finish();
+  EXPECT_EQ(joined, "%what%    ");
 
   /// @brief character
-  EXPECT_EQ(imp::to_string('A'), "A");
-  EXPECT_EQ(imp::to_string(L'A'), "A");
-  EXPECT_EQ(imp::to_string(u'A'), "A");
-  EXPECT_EQ(imp::to_string(U'A'), "A");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 'A')); ctx.finish();
+  EXPECT_EQ(joined, "A");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, L'A')); ctx.finish();
+  EXPECT_EQ(joined, "A");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, u'A')); ctx.finish();
+  EXPECT_EQ(joined, "A");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, U'A')); ctx.finish();
+  EXPECT_EQ(joined, "A");
 
   /// @brief numeric
-  EXPECT_EQ(imp::to_string((signed char)123), "123");
-  EXPECT_EQ(imp::to_string((signed char)-321), "-65");
-  EXPECT_EQ(imp::to_string((unsigned char)123), "123");
-  EXPECT_EQ(imp::to_string((unsigned char)321), "65");
-  EXPECT_EQ(imp::to_string((short)123), "123");
-  EXPECT_EQ(imp::to_string((short)-321), "-321");
-  EXPECT_EQ(imp::to_string((unsigned short)123), "123");
-  EXPECT_EQ(imp::to_string((unsigned short)321), "321");
-  EXPECT_EQ(imp::to_string((short)123123), "-7949");
-  EXPECT_EQ(imp::to_string((short)-321321), "6359");
-  EXPECT_EQ(imp::to_string((unsigned short)123123), "57587");
-  EXPECT_EQ(imp::to_string((unsigned short)321321), "59177");
-  EXPECT_EQ(imp::to_string(123123), "123123");
-  EXPECT_EQ(imp::to_string(-321321), "-321321");
-  EXPECT_EQ(imp::to_string(123123u), "123123");
-  EXPECT_EQ(imp::to_string(321321u), "321321");
-  EXPECT_EQ(imp::to_string(123123ll), "123123");
-  EXPECT_EQ(imp::to_string(-321321ll), "-321321");
-  EXPECT_EQ(imp::to_string(123123ull), "123123");
-  EXPECT_EQ(imp::to_string(321321ull), "321321");
-  EXPECT_EQ(imp::to_string(123123, "x"), "1e0f3");
-  EXPECT_EQ(imp::to_string(123123u, "x"), "1e0f3");
-  EXPECT_EQ(imp::to_string(123123123123ll, "X"), "1CAAB5C3B3");
-  EXPECT_EQ(imp::to_string(123123123123ull, "X"), "1CAAB5C3B3");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (signed char)123)); ctx.finish(); EXPECT_EQ(joined, "123");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (signed char)-321)); ctx.finish(); EXPECT_EQ(joined, "-65");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (unsigned char)123)); ctx.finish(); EXPECT_EQ(joined, "123");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (unsigned char)321)); ctx.finish(); EXPECT_EQ(joined, "65");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (short)123)); ctx.finish(); EXPECT_EQ(joined, "123");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (short)-321)); ctx.finish(); EXPECT_EQ(joined, "-321");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (unsigned short)123)); ctx.finish(); EXPECT_EQ(joined, "123");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (unsigned short)321)); ctx.finish(); EXPECT_EQ(joined, "321");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (short)123123)); ctx.finish(); EXPECT_EQ(joined, "-7949");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (short)-321321)); ctx.finish(); EXPECT_EQ(joined, "6359");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (unsigned short)123123)); ctx.finish(); EXPECT_EQ(joined, "57587");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (unsigned short)321321)); ctx.finish(); EXPECT_EQ(joined, "59177");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123)); ctx.finish(); EXPECT_EQ(joined, "123123");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, -321321)); ctx.finish(); EXPECT_EQ(joined, "-321321");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123u)); ctx.finish(); EXPECT_EQ(joined, "123123");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 321321u)); ctx.finish(); EXPECT_EQ(joined, "321321");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123ll)); ctx.finish(); EXPECT_EQ(joined, "123123");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, -321321ll)); ctx.finish(); EXPECT_EQ(joined, "-321321");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123ull)); ctx.finish(); EXPECT_EQ(joined, "123123");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 321321ull)); ctx.finish(); EXPECT_EQ(joined, "321321");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123, "x")); ctx.finish(); EXPECT_EQ(joined, "1e0f3");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123u, "x")); ctx.finish(); EXPECT_EQ(joined, "1e0f3");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123123123ll, "X")); ctx.finish(); EXPECT_EQ(joined, "1CAAB5C3B3");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123123123ull, "X")); ctx.finish(); EXPECT_EQ(joined, "1CAAB5C3B3");
 
   /// @brief floating point
-  EXPECT_EQ(imp::to_string(123.123f, ".3"), "123.123");
-  EXPECT_EQ(imp::to_string(123.123, "010.5"), "0123.12300");
-  EXPECT_EQ(imp::to_string(123.123l, "010.6"), "123.123000");
-  EXPECT_EQ(imp::to_string(1.5, "e"), "1.500000e+00");
-  EXPECT_EQ(imp::to_string(1.5, "E"), "1.500000E+00");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123.123f, ".3")); ctx.finish(); EXPECT_EQ(joined, "123.123");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123.123, "010.5")); ctx.finish(); EXPECT_EQ(joined, "0123.12300");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123.123l, "010.6")); ctx.finish(); EXPECT_EQ(joined, "123.123000");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 1.5, "e")); ctx.finish(); EXPECT_EQ(joined, "1.500000e+00");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 1.5, "E")); ctx.finish(); EXPECT_EQ(joined, "1.500000E+00");
   double r = 0.0;
-  std::cout << imp::to_string(0.0/r) << "\n";
-  std::cout << imp::to_string(1.0/r) << "\n";
-  SUCCEED();
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 0.0/r)); ctx.finish();
+  std::cout << joined << "\n";
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 1.0/r)); ctx.finish();
+  std::cout << joined << "\n";
 
   /// @brief pointer
-  EXPECT_EQ(imp::to_string(nullptr), "null");
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, nullptr)); ctx.finish(); EXPECT_EQ(joined, "null");
   int *p = (int *)0x0f013a04;
-  std::cout << imp::to_string((void *)p) << "\n";
-  SUCCEED();
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (void *)p)); ctx.finish();
+  std::cout << joined << "\n";
 
   /// @brief date and time
   auto tp = std::chrono::system_clock::now();
   auto tt = std::chrono::system_clock::to_time_t(tp);
   auto tm = *std::localtime(&tt);
-  std::cout << imp::to_string(tm) << "\n";
-  EXPECT_EQ(imp::to_string(tm), imp::to_string(tp));
-  SUCCEED();
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, tm)); ctx.finish();
+  std::cout << joined << "\n";
+  std::string tm_str = joined;
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, tp)); ctx.finish();
+  EXPECT_EQ(tm_str, joined);
 }
 
 TEST(fmt, fmt) {
@@ -87,7 +102,7 @@ namespace {
 
 class foo {};
 
-std::string tag_invoke(decltype(imp::fmt_to_string), foo arg) noexcept(false) {
+bool tag_invoke(decltype(imp::fmt_to), imp::fmt_context &, foo arg) noexcept(false) {
   throw arg;
   return {};
 }
@@ -95,5 +110,5 @@ std::string tag_invoke(decltype(imp::fmt_to_string), foo arg) noexcept(false) {
 } // namespace
 
 TEST(fmt, throw) {
-  EXPECT_THROW(imp::fmt(foo{}), foo);
+  EXPECT_THROW(std::ignore = imp::fmt(foo{}), foo);
 }
\ No newline at end of file
diff --git a/test/imp/test_imp_system.cpp b/test/imp/test_imp_system.cpp
index b3d46c2a..81a6f6d4 100644
--- a/test/imp/test_imp_system.cpp
+++ b/test/imp/test_imp_system.cpp
@@ -26,9 +26,6 @@ TEST(system, error_code) {
   imp::sys::error e_obj {err};
   EXPECT_EQ(err.value(), e_obj.value());
   auto e_msg = imp::fmt(imp::sys::error_msg(imp::sys::error_code()));
-  std::stringstream ss;
-  ss << imp::sys::error{};
-  EXPECT_EQ(e_msg, ss.str());
   EXPECT_EQ(e_msg, imp::fmt(imp::sys::error()));
   std::cout << e_msg << "\n";
 }

From 163e9b9ae18abe008ad6ea79857a6ea36a640f48 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 4 Dec 2022 18:28:27 +0800
Subject: [PATCH 126/272] upd: optimize ut

---
 test/imp/test_imp_fmt.cpp | 91 +++++++++++++++++++--------------------
 1 file changed, 45 insertions(+), 46 deletions(-)

diff --git a/test/imp/test_imp_fmt.cpp b/test/imp/test_imp_fmt.cpp
index faf2f196..235ebff3 100644
--- a/test/imp/test_imp_fmt.cpp
+++ b/test/imp/test_imp_fmt.cpp
@@ -17,58 +17,57 @@ TEST(fmt, to_string) {
   std::string joined;
   imp::fmt_context ctx(joined);
 
+  auto check = [&](auto &&txt, auto &&...val) {
+    ctx.reset();
+    EXPECT_TRUE(imp::to_string(ctx, std::forward<decltype(val)>(val)...));
+    ctx.finish();
+    EXPECT_EQ(joined, std::forward<decltype(txt)>(txt));
+  };
+
   /// @brief string
-  EXPECT_TRUE(imp::to_string(ctx, "")); ctx.finish();
-  EXPECT_EQ(joined, "");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, "%what%")); ctx.finish();
-  EXPECT_EQ(joined, "%what%");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, "%what%", "10")); ctx.finish();
-  EXPECT_EQ(joined, "    %what%");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, "%what%", "-10")); ctx.finish();
-  EXPECT_EQ(joined, "%what%    ");
+  check("", "");
+  check("%what%", "%what%");
+  check("    %what%", "%what%", "10");
+  check("%what%    ", "%what%", "-10");
 
   /// @brief character
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 'A')); ctx.finish();
-  EXPECT_EQ(joined, "A");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, L'A')); ctx.finish();
-  EXPECT_EQ(joined, "A");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, u'A')); ctx.finish();
-  EXPECT_EQ(joined, "A");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, U'A')); ctx.finish();
-  EXPECT_EQ(joined, "A");
+  check("A", 'A');
+  check("A", L'A');
+  check("A", u'A');
+  check("A", U'A');
 
   /// @brief numeric
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (signed char)123)); ctx.finish(); EXPECT_EQ(joined, "123");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (signed char)-321)); ctx.finish(); EXPECT_EQ(joined, "-65");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (unsigned char)123)); ctx.finish(); EXPECT_EQ(joined, "123");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (unsigned char)321)); ctx.finish(); EXPECT_EQ(joined, "65");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (short)123)); ctx.finish(); EXPECT_EQ(joined, "123");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (short)-321)); ctx.finish(); EXPECT_EQ(joined, "-321");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (unsigned short)123)); ctx.finish(); EXPECT_EQ(joined, "123");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (unsigned short)321)); ctx.finish(); EXPECT_EQ(joined, "321");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (short)123123)); ctx.finish(); EXPECT_EQ(joined, "-7949");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (short)-321321)); ctx.finish(); EXPECT_EQ(joined, "6359");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (unsigned short)123123)); ctx.finish(); EXPECT_EQ(joined, "57587");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (unsigned short)321321)); ctx.finish(); EXPECT_EQ(joined, "59177");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123)); ctx.finish(); EXPECT_EQ(joined, "123123");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, -321321)); ctx.finish(); EXPECT_EQ(joined, "-321321");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123u)); ctx.finish(); EXPECT_EQ(joined, "123123");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 321321u)); ctx.finish(); EXPECT_EQ(joined, "321321");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123ll)); ctx.finish(); EXPECT_EQ(joined, "123123");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, -321321ll)); ctx.finish(); EXPECT_EQ(joined, "-321321");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123ull)); ctx.finish(); EXPECT_EQ(joined, "123123");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 321321ull)); ctx.finish(); EXPECT_EQ(joined, "321321");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123, "x")); ctx.finish(); EXPECT_EQ(joined, "1e0f3");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123u, "x")); ctx.finish(); EXPECT_EQ(joined, "1e0f3");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123123123ll, "X")); ctx.finish(); EXPECT_EQ(joined, "1CAAB5C3B3");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123123123123ull, "X")); ctx.finish(); EXPECT_EQ(joined, "1CAAB5C3B3");
+  check("123"       , (signed char)123      );
+  check("-65"       , (signed char)-321     );
+  check("123"       , (unsigned char)123    );
+  check("65"        , (unsigned char)321    );
+  check("123"       , (short)123            );
+  check("-321"      , (short)-321           );
+  check("123"       , (unsigned short)123   );
+  check("321"       , (unsigned short)321   );
+  check("-7949"     , (short)123123         );
+  check("6359"      , (short)-321321        );
+  check("57587"     , (unsigned short)123123);
+  check("59177"     , (unsigned short)321321);
+  check("123123"    , 123123                );
+  check("-321321"   , -321321               );
+  check("123123"    , 123123u               );
+  check("321321"    , 321321u               );
+  check("123123"    , 123123ll              );
+  check("-321321"   , -321321ll             );
+  check("123123"    , 123123ull             );
+  check("321321"    , 321321ull             );
+  check("1e0f3"     , 123123, "x"           );
+  check("1e0f3"     , 123123u, "x"          );
+  check("1CAAB5C3B3", 123123123123ll, "X"   );
+  check("1CAAB5C3B3", 123123123123ull, "X"  );
 
   /// @brief floating point
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123.123f, ".3")); ctx.finish(); EXPECT_EQ(joined, "123.123");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123.123, "010.5")); ctx.finish(); EXPECT_EQ(joined, "0123.12300");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 123.123l, "010.6")); ctx.finish(); EXPECT_EQ(joined, "123.123000");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 1.5, "e")); ctx.finish(); EXPECT_EQ(joined, "1.500000e+00");
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 1.5, "E")); ctx.finish(); EXPECT_EQ(joined, "1.500000E+00");
+  check("123.123"     , 123.123f, ".3");
+  check("0123.12300"  , 123.123, "010.5");
+  check("123.123000"  , 123.123l, "010.6");
+  check("1.500000e+00", 1.5, "e");
+  check("1.500000E+00", 1.5, "E");
   double r = 0.0;
   ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 0.0/r)); ctx.finish();
   std::cout << joined << "\n";
@@ -76,7 +75,7 @@ TEST(fmt, to_string) {
   std::cout << joined << "\n";
 
   /// @brief pointer
-  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, nullptr)); ctx.finish(); EXPECT_EQ(joined, "null");
+  check("null", nullptr);
   int *p = (int *)0x0f013a04;
   ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (void *)p)); ctx.finish();
   std::cout << joined << "\n";

From 8a79e9a86b5e23d2a5f23b7e7969fd3c8771d766 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 4 Dec 2022 19:07:55 +0800
Subject: [PATCH 127/272] fix: [imp] long string formatting output

---
 benchmark/benchmark_fmt.cpp | 40 ++++++++++++++---------------
 include/libimp/fmt_cpo.h    |  5 ++--
 src/libimp/fmt.cpp          | 51 +++++++++++++++++--------------------
 test/imp/test_imp_fmt.cpp   | 14 ++++++++++
 4 files changed, 59 insertions(+), 51 deletions(-)

diff --git a/benchmark/benchmark_fmt.cpp b/benchmark/benchmark_fmt.cpp
index be39e1a8..80175447 100644
--- a/benchmark/benchmark_fmt.cpp
+++ b/benchmark/benchmark_fmt.cpp
@@ -15,19 +15,19 @@ void imp_fmt_string(benchmark::State &state) {
   }
 }
 
-void imp_fmt_multi_string(benchmark::State &state) {
+void imp_multi_fmt_string(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = imp::fmt("hello world.", "hello world.", "hello world.", "hello world.", "hello world.");
   }
 }
 
-void fmt_format_string(benchmark::State &state) {
+void fmt_fmt_string(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = fmt::format("hello world.hello world.hello world.hello world.hello world.");
   }
 }
 
-void fmt_format_multi_string(benchmark::State &state) {
+void fmt_multi_fmt_string(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = fmt::format("{}{}{}{}{}", 
                               "hello world.", " hello world.", " hello world.", " hello world.", " hello world.");
@@ -40,19 +40,19 @@ void imp_fmt_int(benchmark::State &state) {
   }
 }
 
-void imp_fmt_multi_int(benchmark::State &state) {
+void imp_multi_fmt_int(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = imp::fmt(654321, 654321, 654321, 654321, 654321);
   }
 }
 
-void fmt_format_int(benchmark::State &state) {
+void fmt_fmt_int(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = fmt::format("{}", 654321);
   }
 }
 
-void fmt_format_multi_int(benchmark::State &state) {
+void fmt_multi_fmt_int(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = fmt::format("{}{}{}{}{}", 654321, 654321, 654321, 654321, 654321);
   }
@@ -64,19 +64,19 @@ void imp_fmt_float(benchmark::State &state) {
   }
 }
 
-void imp_fmt_multi_float(benchmark::State &state) {
+void imp_multi_fmt_float(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = imp::fmt(654.321, 654.321, 654.321, 654.321, 654.321);
   }
 }
 
-void fmt_format_float(benchmark::State &state) {
+void fmt_fmt_float(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = fmt::format("{}", 654.321);
   }
 }
 
-void fmt_format_multi_float(benchmark::State &state) {
+void fmt_multi_fmt_float(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = fmt::format("{}{}{}{}{}", 654.321, 654.321, 654.321, 654.321, 654.321);
   }
@@ -88,7 +88,7 @@ void imp_fmt_chrono(benchmark::State &state) {
   }
 }
 
-void fmt_format_chrono(benchmark::State &state) {
+void fmt_fmt_chrono(benchmark::State &state) {
   for (auto _ : state) {
     std::ignore = fmt::format("{}", std::chrono::system_clock::now());
   }
@@ -97,18 +97,18 @@ void fmt_format_chrono(benchmark::State &state) {
 } // namespace
 
 BENCHMARK(imp_fmt_string);
-BENCHMARK(fmt_format_string);
+BENCHMARK(fmt_fmt_string);
 BENCHMARK(imp_fmt_int);
-BENCHMARK(fmt_format_int);
+BENCHMARK(fmt_fmt_int);
 BENCHMARK(imp_fmt_float);
-BENCHMARK(fmt_format_float);
+BENCHMARK(fmt_fmt_float);
 
-BENCHMARK(imp_fmt_multi_string);
-BENCHMARK(fmt_format_multi_string);
-BENCHMARK(imp_fmt_multi_int);
-BENCHMARK(fmt_format_multi_int);
-BENCHMARK(imp_fmt_multi_float);
-BENCHMARK(fmt_format_multi_float);
+BENCHMARK(imp_multi_fmt_string);
+BENCHMARK(fmt_multi_fmt_string);
+BENCHMARK(imp_multi_fmt_int);
+BENCHMARK(fmt_multi_fmt_int);
+BENCHMARK(imp_multi_fmt_float);
+BENCHMARK(fmt_multi_fmt_float);
 
 BENCHMARK(imp_fmt_chrono);
-BENCHMARK(fmt_format_chrono);
+BENCHMARK(fmt_fmt_chrono);
diff --git a/include/libimp/fmt_cpo.h b/include/libimp/fmt_cpo.h
index 48437f53..3d94ec5e 100644
--- a/include/libimp/fmt_cpo.h
+++ b/include/libimp/fmt_cpo.h
@@ -35,9 +35,8 @@ class LIBIMP_EXPORT fmt_context {
   std::size_t capacity() noexcept;
   void reset() noexcept;
   bool finish() noexcept;
-  bool resize(std::size_t sz) noexcept;
-  span<char> buffer() noexcept;
-  bool expend(std::size_t sz) noexcept;
+  span<char> buffer(std::size_t sz) noexcept;
+  void expend(std::size_t sz) noexcept;
   bool append(std::string const &str) noexcept;
 };
 
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index c2ba5029..587b99bb 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -111,17 +111,15 @@ span<char> fmt_of_float(span<char const> fstr, span<char const> const &l) {
 
 template <typename A /*a fundamental or pointer type*/>
 int sprintf(fmt_context &ctx, span<char const> const &sfmt, A a) {
-  for (;;) {
-    auto sbuf = ctx.buffer();
-    auto sz = std::snprintf(sbuf.data(), sbuf.size(), sfmt.data(), a);
+  for (int sz = -1;;) {
+    auto sbuf = ctx.buffer(sz + 1);
+    sz = std::snprintf(sbuf.data(), sbuf.size(), sfmt.data(), a);
     if (sz <= 0) {
       return sz;
     }
     if (sz < sbuf.size()) {
-      return ctx.expend(sz) ? sz : -1;
-    }
-    if (!ctx.resize(sz + 1)) {
-      return -1;
+      ctx.expend(sz);
+      return sz;
     }
   }
 }
@@ -165,38 +163,35 @@ bool fmt_context::finish() noexcept {
   }
 }
 
-bool fmt_context::resize(std::size_t sz) noexcept {
+span<char> fmt_context::buffer(std::size_t sz) noexcept {
   LIBIMP_TRY {
-    if (sz < sbuf_.size()) {
-      return true;
+    if (offset_ < sbuf_.size()) {
+      if ((offset_ + sz) < sbuf_.size()) {
+        return make_span(sbuf_).subspan(offset_);
+      } else {
+        /// @remark switch the cache to std::string
+        joined_.assign(sbuf_.data(), offset_);
+        joined_.resize(roundup(offset_ + sz));
+      }
+    } else if ((offset_ + sz) >= joined_.size()) {
+      joined_.resize(roundup(offset_ + sz));
     }
-    joined_.resize(roundup(sz));
-    return true;
-  } LIBIMP_CATCH(...) {
-    return false;
-  }
-}
-
-span<char> fmt_context::buffer() noexcept {
-  if (offset_ < sbuf_.size()) {
-    return make_span(sbuf_).subspan(offset_);
-  } else {
     return {&joined_[offset_], joined_.size() - offset_};
+  } LIBIMP_CATCH(...) {
+    return {};
   }
 }
 
-bool fmt_context::expend(std::size_t sz) noexcept {
-  if ((offset_ += sz) < sbuf_.size()) {
-    return true;
-  }
-  return (offset_ < joined_.size()) || resize(offset_);
+void fmt_context::expend(std::size_t sz) noexcept {
+  offset_ += sz;
 }
 
 bool fmt_context::append(std::string const &str) noexcept {
-  if ((buffer().size() < str.size()) && !resize(offset_ + str.size())) {
+  auto sbuf = buffer(str.size());
+  if (sbuf.size() < str.size()) {
     return false;
   }
-  std::memcpy(buffer().data(), str.data(), str.size());
+  std::memcpy(sbuf.data(), str.data(), str.size());
   offset_ += str.size();
   return true;
 }
diff --git a/test/imp/test_imp_fmt.cpp b/test/imp/test_imp_fmt.cpp
index 235ebff3..3e0e39cb 100644
--- a/test/imp/test_imp_fmt.cpp
+++ b/test/imp/test_imp_fmt.cpp
@@ -92,9 +92,23 @@ TEST(fmt, to_string) {
 }
 
 TEST(fmt, fmt) {
+  /// @brief hello world
   auto s = imp::fmt("hello", " ", "world", ".");
   EXPECT_EQ(s, "hello world.");
+
+  /// @brief chrono
   std::cout << imp::fmt('[', std::chrono::system_clock::now(), "] ", s) << "\n";
+
+  /// @brief long string
+  s = imp::fmt(imp::spec("1024")("hello world."));
+  EXPECT_EQ(s, "                                                                                                                                "
+               "                                                                                                                                "
+               "                                                                                                                                "
+               "                                                                                                                                "
+               "                                                                                                                                "
+               "                                                                                                                                "
+               "                                                                                                                                "
+               "                                                                                                                    hello world.");
 }
 
 namespace {

From 6ca5d39a0c07e6ffc7fdbfc65b66810b28eb7d7f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 4 Dec 2022 19:14:59 +0800
Subject: [PATCH 128/272] fix: [imp] fmt buffer failsafe

---
 src/libimp/fmt.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index 587b99bb..dfeb2288 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -113,6 +113,9 @@ template <typename A /*a fundamental or pointer type*/>
 int sprintf(fmt_context &ctx, span<char const> const &sfmt, A a) {
   for (int sz = -1;;) {
     auto sbuf = ctx.buffer(sz + 1);
+    if (sbuf.size() < (sz + 1)) {
+      return -1;
+    }
     sz = std::snprintf(sbuf.data(), sbuf.size(), sfmt.data(), a);
     if (sz <= 0) {
       return sz;

From 217bde267421fcde487351b42f31025159e79e92 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 4 Dec 2022 19:19:48 +0800
Subject: [PATCH 129/272] upd: optimize benchmark

---
 benchmark/benchmark_fmt.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/benchmark/benchmark_fmt.cpp b/benchmark/benchmark_fmt.cpp
index 80175447..186bae27 100644
--- a/benchmark/benchmark_fmt.cpp
+++ b/benchmark/benchmark_fmt.cpp
@@ -83,14 +83,16 @@ void fmt_multi_fmt_float(benchmark::State &state) {
 }
 
 void imp_fmt_chrono(benchmark::State &state) {
+  auto now = std::chrono::system_clock::now();
   for (auto _ : state) {
-    std::ignore = imp::fmt(std::chrono::system_clock::now());
+    std::ignore = imp::fmt(now);
   }
 }
 
 void fmt_fmt_chrono(benchmark::State &state) {
+  auto now = std::chrono::system_clock::now();
   for (auto _ : state) {
-    std::ignore = fmt::format("{}", std::chrono::system_clock::now());
+    std::ignore = fmt::format("{}", now);
   }
 }
 

From 9f51c017e7302ffd28261f833b4be3c35fcf6eb7 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Tue, 6 Dec 2022 23:14:23 +0800
Subject: [PATCH 130/272] upd: [imp] optimize the size of the fmt context

---
 include/libimp/fmt_cpo.h  |  5 ----
 src/libimp/fmt.cpp        | 58 +++++++++++++++++++++++++--------------
 test/imp/test_imp_fmt.cpp | 17 +++++-------
 3 files changed, 44 insertions(+), 36 deletions(-)

diff --git a/include/libimp/fmt_cpo.h b/include/libimp/fmt_cpo.h
index 3d94ec5e..dbb28bd7 100644
--- a/include/libimp/fmt_cpo.h
+++ b/include/libimp/fmt_cpo.h
@@ -7,7 +7,6 @@
 #pragma once
 
 #include <string>
-#include <array>
 #include <cstddef>
 
 #include "libimp/def.h"
@@ -18,14 +17,10 @@
 
 LIBIMP_NAMESPACE_BEG_
 
-constexpr std::size_t fmt_context_aligned_size = 512U;
-
 /**
  * @brief The context of fmt.
  */
 class LIBIMP_EXPORT fmt_context {
-  std::array<char, fmt_context_aligned_size> sbuf_;
-
   std::string &joined_;
   std::size_t  offset_;
 
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index dfeb2288..39c34f2b 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -19,8 +19,18 @@ LIBIMP_NAMESPACE_BEG_
  */
 namespace {
 
-constexpr std::size_t roundup(std::size_t sz) noexcept {
-  return (sz & ~(fmt_context_aligned_size - 1)) + fmt_context_aligned_size;
+struct sfmt_policy {
+  constexpr static std::size_t aligned_size = 32U;
+};
+
+struct sbuf_policy {
+  constexpr static std::size_t aligned_size = 2048U;
+};
+
+template <typename Policy = sfmt_policy>
+span<char> local_fmt_sbuf() noexcept {
+  thread_local std::array<char, Policy::aligned_size> sbuf;
+  return sbuf;
 }
 
 span<char const> normalize(span<char const> const &a) {
@@ -52,19 +62,14 @@ span<char> sbuf_cat(span<char> const &sbuf, std::initializer_list<span<char cons
   return sbuf.first(sz);
 }
 
-span<char> local_fmt_str() noexcept {
-  thread_local std::array<char, fmt_context_aligned_size> sbuf;
-  return sbuf;
-}
-
 char const *as_cstr(span<char const> const &a) {
   if (a.empty()) return "";
   if (a.back() == '\0') return a.data();
-  return sbuf_cpy(local_fmt_str(), a).data();
+  return sbuf_cpy(local_fmt_sbuf(), a).data();
 }
 
 span<char> fmt_of(span<char const> const &fstr, span<char const> const &s) {
-  return sbuf_cat(local_fmt_str(), {"%", fstr, s});
+  return sbuf_cat(local_fmt_sbuf(), {"%", fstr, s});
 }
 
 span<char> fmt_of_unsigned(span<char const> fstr, span<char const> const &l) {
@@ -76,8 +81,8 @@ span<char> fmt_of_unsigned(span<char const> fstr, span<char const> const &l) {
     case 'o':
     case 'x':
     case 'X':
-    case 'u': return sbuf_cat(local_fmt_str(), {"%", fstr.first(fstr.size() - 1), l, fstr.last(1)});
-    default : return sbuf_cat(local_fmt_str(), {"%", fstr, l, "u"});
+    case 'u': return sbuf_cat(local_fmt_sbuf(), {"%", fstr.first(fstr.size() - 1), l, fstr.last(1)});
+    default : return sbuf_cat(local_fmt_sbuf(), {"%", fstr, l, "u"});
   }
 }
 
@@ -91,7 +96,7 @@ span<char> fmt_of_signed(span<char const> fstr, span<char const> const &l) {
     case 'x':
     case 'X':
     case 'u': return fmt_of_unsigned(fstr, l);
-    default : return sbuf_cat(local_fmt_str(), {"%", fstr, l, "d"});
+    default : return sbuf_cat(local_fmt_sbuf(), {"%", fstr, l, "d"});
   }
 }
 
@@ -104,8 +109,8 @@ span<char> fmt_of_float(span<char const> fstr, span<char const> const &l) {
     case 'e':
     case 'E':
     case 'g':
-    case 'G': return sbuf_cat(local_fmt_str(), {"%", fstr.first(fstr.size() - 1), l, fstr.last(1)});
-    default : return sbuf_cat(local_fmt_str(), {"%", fstr, l, "f"});
+    case 'G': return sbuf_cat(local_fmt_sbuf(), {"%", fstr.first(fstr.size() - 1), l, fstr.last(1)});
+    default : return sbuf_cat(local_fmt_sbuf(), {"%", fstr, l, "f"});
   }
 }
 
@@ -137,6 +142,10 @@ bool sprintf(fmt_context &ctx, F fop, span<char const> const &fstr, span<char co
   }
 }
 
+span<char> fmt_context_sbuf() noexcept {
+  return local_fmt_sbuf<sbuf_policy>();
+}
+
 } // namespace
 
 /// @brief The context of fmt.
@@ -146,7 +155,9 @@ fmt_context::fmt_context(std::string &j) noexcept
   , offset_(0) {}
 
 std::size_t fmt_context::capacity() noexcept {
-  return (offset_ < sbuf_.size()) ? sbuf_.size() : joined_.size();
+  return (offset_ < fmt_context_sbuf().size())
+                  ? fmt_context_sbuf().size()
+                  : joined_.size();
 }
 
 void fmt_context::reset() noexcept {
@@ -155,8 +166,8 @@ void fmt_context::reset() noexcept {
 
 bool fmt_context::finish() noexcept {
   LIBIMP_TRY {
-    if (offset_ < sbuf_.size()) {
-      joined_.assign(sbuf_.data(), offset_);
+    if (offset_ < fmt_context_sbuf().size()) {
+      joined_.assign(fmt_context_sbuf().data(), offset_);
     } else {
       joined_.resize(offset_);
     }
@@ -167,13 +178,18 @@ bool fmt_context::finish() noexcept {
 }
 
 span<char> fmt_context::buffer(std::size_t sz) noexcept {
+  auto roundup = [](std::size_t sz) noexcept {
+    constexpr std::size_t fmt_context_aligned_size = 512U;
+    return (sz & ~(fmt_context_aligned_size - 1)) + fmt_context_aligned_size;
+  };
+  auto sbuf = fmt_context_sbuf();
   LIBIMP_TRY {
-    if (offset_ < sbuf_.size()) {
-      if ((offset_ + sz) < sbuf_.size()) {
-        return make_span(sbuf_).subspan(offset_);
+    if (offset_ < sbuf.size()) {
+      if ((offset_ + sz) < sbuf.size()) {
+        return sbuf.subspan(offset_);
       } else {
         /// @remark switch the cache to std::string
-        joined_.assign(sbuf_.data(), offset_);
+        joined_.assign(sbuf.data(), offset_);
         joined_.resize(roundup(offset_ + sz));
       }
     } else if ((offset_ + sz) >= joined_.size()) {
diff --git a/test/imp/test_imp_fmt.cpp b/test/imp/test_imp_fmt.cpp
index 3e0e39cb..8836800b 100644
--- a/test/imp/test_imp_fmt.cpp
+++ b/test/imp/test_imp_fmt.cpp
@@ -92,23 +92,20 @@ TEST(fmt, to_string) {
 }
 
 TEST(fmt, fmt) {
+  char const txt[] = "hello world.";
+
   /// @brief hello world
   auto s = imp::fmt("hello", " ", "world", ".");
-  EXPECT_EQ(s, "hello world.");
+  EXPECT_EQ(s, txt);
 
   /// @brief chrono
   std::cout << imp::fmt('[', std::chrono::system_clock::now(), "] ", s) << "\n";
 
   /// @brief long string
-  s = imp::fmt(imp::spec("1024")("hello world."));
-  EXPECT_EQ(s, "                                                                                                                                "
-               "                                                                                                                                "
-               "                                                                                                                                "
-               "                                                                                                                                "
-               "                                                                                                                                "
-               "                                                                                                                                "
-               "                                                                                                                                "
-               "                                                                                                                    hello world.");
+  s = imp::fmt(imp::spec("4096")(txt));
+  std::string test(4096, ' ');
+  std::memcpy(&test[test.size() - sizeof(txt) + 1], txt, sizeof(txt) - 1);
+  EXPECT_EQ(s, test);
 }
 
 namespace {

From ff250cd7acd3bbaa2d6038da4750977e5cdd1e42 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 18 Dec 2022 14:20:36 +0800
Subject: [PATCH 131/272] upd: [imp] optimize `result`

---
 include/libimp/generic.h           |  20 ++++++
 include/libimp/result.h            | 103 +++++++++++++++--------------
 src/libipc/platform/win/shm_impl.h |   2 +-
 test/imp/test_imp_result.cpp       |   5 ++
 4 files changed, 79 insertions(+), 51 deletions(-)

diff --git a/include/libimp/generic.h b/include/libimp/generic.h
index 80932ac0..6ef09137 100644
--- a/include/libimp/generic.h
+++ b/include/libimp/generic.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <utility>
+#include <type_traits>
 
 #include "libimp/def.h"
 
@@ -40,4 +41,23 @@ struct tag_invoke_t {
 
 constexpr detail::tag_invoke_t tag_invoke {};
 
+/**
+ * @brief Circumventing forwarding reference may override copy and move constructs.
+ * @see https://mpark.github.io/programming/2014/06/07/beware-of-perfect-forwarding-constructors/
+ */
+namespace detail {
+
+template <typename T, typename... A>
+struct is_same_first : std::false_type {};
+
+template <typename T>
+struct is_same_first<T, T> : std::true_type {};
+
+} // namespace detail
+
+template <typename T, typename... A>
+using is_not_match = 
+  typename std::enable_if<!detail::is_same_first<T, 
+  typename std::decay<A>::type...>::value>::type;
+
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/result.h b/include/libimp/result.h
index 4aa87357..5ab78a7c 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -14,6 +14,7 @@
 #include "libimp/detect_plat.h"
 #include "libimp/export.h"
 #include "libimp/fmt.h"
+#include "libimp/generic.h"
 
 LIBIMP_NAMESPACE_BEG_
 
@@ -54,22 +55,35 @@ struct default_traits;
 } // namespace detail_result
 
 template <typename T, 
-          typename DefTraits = detail_result::default_traits<T>, 
-          typename = void>
+          typename TypeTraits = detail_result::default_traits<T>>
 class result;
 
 namespace detail_result {
 
 template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
-  constexpr static T value() noexcept { return 0; }
+  /// @brief Custom initialization.
+  constexpr static void init_code(result_code &code) noexcept {
+    code = {};
+  }
+  constexpr static void init_code(result_code &code, bool ok, T value) noexcept {
+    code = {ok, static_cast<result_type>(value)};
+  }
+  constexpr static void init_code(result_code &code, T value) noexcept {
+    init_code(code, true, value);
+  }
 
-  static result_type cast_to_code(T value) noexcept {
-    return static_cast<result_type>(value);
+  /// @brief Custom default value.
+  constexpr static T default_value() noexcept {
+    return 0;
   }
-  static T cast_from_code(result_type code) noexcept {
-    return static_cast<T>(code);
+
+  /// @brief Custom type conversions.
+  constexpr static T cast_from_code(result_code code) noexcept {
+    return static_cast<T>(code.value());
   }
+
+  /// @brief Custom formatted output.
   static std::string format(result<T> const &r) noexcept {
     return fmt(*r);
   }
@@ -77,14 +91,28 @@ struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
 
 template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
-  constexpr static T value() noexcept { return nullptr; }
+  /// @brief Custom initialization.
+  constexpr static void init_code(result_code &code, T value = default_value()) noexcept {
+    code = {default_value() != value, reinterpret_cast<result_type>(value)};
+  }
+  constexpr static void init_code(result_code &code, std::nullptr_t) noexcept {
+    code = {false, {}};
+  }
+  constexpr static void init_code(result_code &code, std::nullptr_t, result_type r) noexcept {
+    code = {false, r};
+  }
 
-  static result_type cast_to_code(T value) noexcept {
-    return reinterpret_cast<result_type>(value);
+  /// @brief Custom default value.
+  constexpr static T default_value() noexcept {
+    return nullptr;
   }
-  static T cast_from_code(result_type code) noexcept {
-    return reinterpret_cast<T>(code);
+
+  /// @brief Custom type conversions.
+  constexpr static T cast_from_code(result_code code) noexcept {
+    return code.ok() ? reinterpret_cast<T>(code.value()) : default_value();
   }
+
+  /// @brief Custom formatted output.
   static std::string format(result<T> const &r) noexcept {
     if LIBIMP_LIKELY(r) {
       return fmt(static_cast<void *>(*r));
@@ -95,53 +123,28 @@ struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
 
 } // namespace detail_result
 
-template <typename T, typename DefTraits>
-class result<T, DefTraits, std::enable_if_t<std::is_integral<T>::value>> {
+template <typename T, typename TypeTraits>
+class result : public TypeTraits {
 
+  /// @brief Internal data is stored using result_code.
   result_code code_;
 
 public:
-  using default_traits_t = DefTraits;
+  using type_traits_t = TypeTraits;
 
   result() noexcept = default;
 
-  result(T value) noexcept
-    : result(true, std::move(value)) {}
-
-  result(bool ok, T value) noexcept
-    : code_(ok, default_traits_t::cast_to_code(value)) {}
-
-  T value() const noexcept { return default_traits_t::cast_from_code(code_.value()); }
-  bool ok() const noexcept { return code_.ok(); }
-
-  T operator*() const noexcept {
-    return value();
+  template <typename... A, 
+            typename = is_not_match<result, A...>,
+            typename = decltype(type_traits_t::init_code(std::declval<result_code &>()
+                                                       , std::declval<A>()...))>
+  result(A &&... args) noexcept {
+    type_traits_t::init_code(code_, std::forward<A>(args)...);
   }
-  explicit operator bool() const noexcept {
-    return ok();
-  }
-
-  friend bool operator==(result const &lhs, result const &rhs) noexcept { return lhs.code_ == rhs.code_; }
-  friend bool operator!=(result const &lhs, result const &rhs) noexcept { return lhs.code_ != rhs.code_; }
-};
-
-template <typename T, typename DefTraits>
-class result<T, DefTraits, std::enable_if_t<std::is_pointer<T>::value>> {
 
-  result_code code_;
-
-public:
-  using default_traits_t = DefTraits;
-
-  result(T value = default_traits_t::value()) noexcept
-    : code_(default_traits_t::value() != value, 
-            default_traits_t::cast_to_code(value)) {}
-
-  result(std::nullptr_t, result_type code) noexcept
-    : code_(false, code) {}
-
-  T value() const noexcept { return code_.ok() ? default_traits_t::cast_from_code(code_.value()) : nullptr; }
   bool ok() const noexcept { return code_.ok(); }
+  T value() const noexcept { return type_traits_t::cast_from_code(code_); }
+
   result_type code_value() const noexcept { return code_.value(); }
 
   T operator*() const noexcept {
@@ -164,7 +167,7 @@ inline bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, result_code
 
 template <typename T, typename D>
 bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, result<T, D> r) {
-  return fmt_to(ctx, "[", (r ? "succ" : "fail"), ", value = ", result<T, D>::default_traits_t::format(r), "]");
+  return fmt_to(ctx, "[", (r ? "succ" : "fail"), ", value = ", result<T, D>::type_traits_t::format(r), "]");
 }
 
 } // namespace detail
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index 897d94b0..4442d705 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -20,7 +20,7 @@ using namespace ::LIBIMP;
 result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
   LIBIMP_LOG_();
   auto h = mmap_open(name, size, type);
-  if (h == NULL) {
+  if (*h == NULL) {
     log.error("failed: mmap_open(name = ", name, ", size = ", size, ", type = ", type, ").");
     return {nullptr, h.code_value()};
   }
diff --git a/test/imp/test_imp_result.cpp b/test/imp/test_imp_result.cpp
index 162264c4..99ed748c 100644
--- a/test/imp/test_imp_result.cpp
+++ b/test/imp/test_imp_result.cpp
@@ -21,6 +21,11 @@ TEST(result, ok) {
   EXPECT_FALSE(ret);
   EXPECT_FALSE(ret.ok());
   EXPECT_EQ(*ret, 1234);
+
+  imp::result<int *> r2 {nullptr, 4321};
+  EXPECT_NE(r2, nullptr); // imp::result<int *>{nullptr}
+  EXPECT_EQ(*r2, nullptr);
+  EXPECT_FALSE(r2);
 }
 
 TEST(result, code) {

From 3aac7bea08f2b0842b15c6e4b7d5b04e2602efa9 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 18 Dec 2022 17:38:24 +0800
Subject: [PATCH 132/272] add: [imp] `error_code`

---
 include/libimp/error.h      | 68 +++++++++++++++++++++++++++++++++++++
 src/libimp/error.cpp        | 62 +++++++++++++++++++++++++++++++++
 test/imp/test_imp_error.cpp | 31 +++++++++++++++++
 3 files changed, 161 insertions(+)
 create mode 100644 include/libimp/error.h
 create mode 100644 src/libimp/error.cpp
 create mode 100644 test/imp/test_imp_error.cpp

diff --git a/include/libimp/error.h b/include/libimp/error.h
new file mode 100644
index 00000000..7762aa09
--- /dev/null
+++ b/include/libimp/error.h
@@ -0,0 +1,68 @@
+/**
+ * @file libimp/error.h
+ * @author mutouyun (orz@orzz.org)
+ * @brief A platform-dependent error code.
+ * @date 2022-12-18
+ */
+#pragma once
+
+#include <string>
+
+#include "libimp/def.h"
+#include "libimp/export.h"
+#include "libimp/result.h"
+#include "libimp/fmt_cpo.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * @brief Serves as the base class for specific error category types.
+ * @see https://en.cppreference.com/w/cpp/error/error_category
+ */
+class LIBIMP_EXPORT error_category {
+public:
+  error_category(error_category const &) = delete;
+  error_category &operator=(error_category const &) = delete;
+
+  constexpr error_category() noexcept = default;
+  virtual ~error_category() noexcept = default;
+
+  /// @brief observer
+  virtual std::string message(result_code r) const = 0;
+
+  /// @brief comparison function
+  bool operator==(error_category const &rhs) const noexcept;
+};
+
+/**
+ * @brief Identifies the generic error category.
+ * @see https://en.cppreference.com/w/cpp/error/generic_category
+ */
+LIBIMP_EXPORT error_category const &generic_category() noexcept;
+
+/**
+ * @brief The error code object.
+ * @see https://en.cppreference.com/w/cpp/error/error_code
+ */
+class LIBIMP_EXPORT error_code {
+  result_code r_code_;
+  error_category const *ec_;
+
+public:
+  /// @brief constructors
+  error_code() noexcept;
+  error_code(result_code r, error_category const &ec) noexcept;
+
+  /// @brief observers
+  result_code code() const noexcept;
+  result_type value() const noexcept;
+  error_category const &category() const noexcept;
+  std::string message() const;
+  explicit operator bool() const noexcept;
+
+  /// @brief comparison functions
+  friend LIBIMP_EXPORT bool operator==(error_code const &lhs, error_code const &rhs) noexcept;
+  friend LIBIMP_EXPORT bool operator!=(error_code const &lhs, error_code const &rhs) noexcept;
+};
+
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/error.cpp b/src/libimp/error.cpp
new file mode 100644
index 00000000..0b10a7f1
--- /dev/null
+++ b/src/libimp/error.cpp
@@ -0,0 +1,62 @@
+#include <typeinfo>
+
+#include "libimp/error.h"
+#include "libimp/fmt.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+bool error_category::operator==(error_category const &rhs) const noexcept {
+  return typeid(*this) == typeid(rhs);
+}
+
+namespace {
+
+class generic_error_category : public error_category {
+public:
+  std::string message(result_code r) const {
+    return fmt("[", r.value(), (!r ? ", \"success\"]" : ", \"failure\"]"));
+  }
+};
+
+} // namespace
+
+error_category const &generic_category() noexcept {
+  static generic_error_category ec;
+  return ec;
+}
+
+error_code::error_code() noexcept
+  : r_code_{}, ec_{&generic_category()} {}
+
+error_code::error_code(result_code r, error_category const &ec) noexcept
+  : r_code_{r}, ec_{&ec} {}
+
+result_code error_code::code() const noexcept {
+  return r_code_;
+}
+
+result_type error_code::value() const noexcept {
+  return r_code_.value();
+}
+
+error_category const &error_code::category() const noexcept {
+  return *ec_;
+}
+
+std::string error_code::message() const {
+  return ec_->message(r_code_);
+}
+
+error_code::operator bool() const noexcept {
+  return !!r_code_;
+}
+
+bool operator==(error_code const &lhs, error_code const &rhs) noexcept {
+  return (lhs.r_code_ == rhs.r_code_) && (*lhs.ec_ == *rhs.ec_);
+}
+
+bool operator!=(error_code const &lhs, error_code const &rhs) noexcept {
+  return !(lhs == rhs);
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/test/imp/test_imp_error.cpp b/test/imp/test_imp_error.cpp
new file mode 100644
index 00000000..08e0d1a2
--- /dev/null
+++ b/test/imp/test_imp_error.cpp
@@ -0,0 +1,31 @@
+#include <iostream>
+
+#include "gtest/gtest.h"
+
+#include "libimp/error.h"
+#include "libimp/result.h"
+#include "libimp/fmt.h"
+
+namespace {
+
+class custom_error_category : public imp::error_category {
+public:
+  std::string message(imp::result_code r) const {
+    return !r ? "success" : "failure";
+  }
+};
+
+} // namespace
+
+TEST(error, error_code) {
+  imp::error_code ecode;
+  EXPECT_FALSE(ecode);
+  std::cout << ecode.message() << "\n";
+  EXPECT_EQ(ecode.message(), "[0, \"success\"]");
+
+  custom_error_category cec;
+  ecode = {123, cec};
+  EXPECT_TRUE(ecode);
+  std::cout << ecode.message() << "\n";
+  EXPECT_EQ(ecode.message(), cec.message(123));
+}
\ No newline at end of file

From e60f856295b063cdc2f2b3a95f4bae238edf537a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 18 Dec 2022 17:57:07 +0800
Subject: [PATCH 133/272] add: [imp] `error_category.name`

---
 include/libimp/error.h      | 11 +++++++++++
 src/libimp/error.cpp        |  7 +++++--
 test/imp/test_imp_error.cpp |  7 +++++--
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/include/libimp/error.h b/include/libimp/error.h
index 7762aa09..1cc59bdc 100644
--- a/include/libimp/error.h
+++ b/include/libimp/error.h
@@ -28,6 +28,7 @@ class LIBIMP_EXPORT error_category {
   virtual ~error_category() noexcept = default;
 
   /// @brief observer
+  virtual std::string name() const = 0;
   virtual std::string message(result_code r) const = 0;
 
   /// @brief comparison function
@@ -65,4 +66,14 @@ class LIBIMP_EXPORT error_code {
   friend LIBIMP_EXPORT bool operator!=(error_code const &lhs, error_code const &rhs) noexcept;
 };
 
+/**
+ * @brief @brief Custom defined fmt_to method for imp::fmt
+ */
+namespace detail {
+
+inline bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, error_code r) noexcept {
+  return fmt_to(ctx, r.message());
+}
+
+} // namespace detail
 LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/error.cpp b/src/libimp/error.cpp
index 0b10a7f1..7c4cafde 100644
--- a/src/libimp/error.cpp
+++ b/src/libimp/error.cpp
@@ -13,8 +13,11 @@ namespace {
 
 class generic_error_category : public error_category {
 public:
+  std::string name() const {
+    return "generic";
+  }
   std::string message(result_code r) const {
-    return fmt("[", r.value(), (!r ? ", \"success\"]" : ", \"failure\"]"));
+    return fmt(r.value(), (!r ? ", \"success\"" : ", \"failure\""));
   }
 };
 
@@ -44,7 +47,7 @@ error_category const &error_code::category() const noexcept {
 }
 
 std::string error_code::message() const {
-  return ec_->message(r_code_);
+  return fmt("[", ec_->name(), ": ", ec_->message(r_code_), "]");
 }
 
 error_code::operator bool() const noexcept {
diff --git a/test/imp/test_imp_error.cpp b/test/imp/test_imp_error.cpp
index 08e0d1a2..d985a3b4 100644
--- a/test/imp/test_imp_error.cpp
+++ b/test/imp/test_imp_error.cpp
@@ -10,6 +10,9 @@ namespace {
 
 class custom_error_category : public imp::error_category {
 public:
+  std::string name() const {
+    return "custom";
+  }
   std::string message(imp::result_code r) const {
     return !r ? "success" : "failure";
   }
@@ -21,11 +24,11 @@ TEST(error, error_code) {
   imp::error_code ecode;
   EXPECT_FALSE(ecode);
   std::cout << ecode.message() << "\n";
-  EXPECT_EQ(ecode.message(), "[0, \"success\"]");
+  EXPECT_EQ(ecode.message(), "[generic: 0, \"success\"]");
 
   custom_error_category cec;
   ecode = {123, cec};
   EXPECT_TRUE(ecode);
   std::cout << ecode.message() << "\n";
-  EXPECT_EQ(ecode.message(), cec.message(123));
+  EXPECT_EQ(ecode.message(), imp::fmt("[", cec.name(), ": ", cec.message(123), "]"));
 }
\ No newline at end of file

From fc6f28a8868cb0c921046cf961535d9e5e360ac4 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 18 Dec 2022 18:16:08 +0800
Subject: [PATCH 134/272] upd: [imp] modify interface of the system header file

---
 include/libimp/system.h            | 41 ++++++-----------------
 src/libimp/platform/posix/system.h |  8 ++---
 src/libimp/platform/win/codecvt.h  |  4 +--
 src/libimp/platform/win/system.h   |  8 ++---
 src/libimp/system.cpp              | 53 +++++++++++-------------------
 src/libipc/platform/win/get_sa.h   |  3 +-
 test/imp/test_imp_system.cpp       | 15 ++++-----
 7 files changed, 47 insertions(+), 85 deletions(-)

diff --git a/include/libimp/system.h b/include/libimp/system.h
index fd3edcf0..469b5209 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -12,17 +12,16 @@
 
 #include "libimp/def.h"
 #include "libimp/export.h"
-#include "libimp/result.h"
-#include "libimp/fmt_cpo.h"
+#include "libimp/error.h"
 
 LIBIMP_NAMESPACE_BEG_
 namespace sys {
 
 /**
- * @brief Get/Set the system error code
+ * @brief Get/Set the system error number
  */
-LIBIMP_EXPORT result_code error_code() noexcept;
-LIBIMP_EXPORT void error_code(result_code) noexcept;
+LIBIMP_EXPORT result_code error_no() noexcept;
+LIBIMP_EXPORT void error_no(result_code) noexcept;
 
 /**
  * @brief Gets a text description of the system error
@@ -30,29 +29,16 @@ LIBIMP_EXPORT void error_code(result_code) noexcept;
 LIBIMP_EXPORT std::string error_str(result_code) noexcept;
 
 /**
- * @brief A text description string with an error number attached
+ * @brief Identifies the operating system error category.
+ * @see https://en.cppreference.com/w/cpp/error/system_category
  */
-LIBIMP_EXPORT std::string error_msg(result_code) noexcept;
+LIBIMP_EXPORT error_category const &category() noexcept;
 
 /**
- * @brief The system error object.
+ * @brief A platform-dependent error code.
+ * @see https://en.cppreference.com/w/cpp/error/error_code
  */
-class LIBIMP_EXPORT error {
-  result_code r_code_;
-
-public:
-  explicit error() noexcept;
-  explicit error(result_code rc) noexcept;
-
-  result_code code() const noexcept;
-  std::uint64_t value() const noexcept;
-  explicit operator bool() const noexcept;
-
-  std::string str() const noexcept;
-
-  friend LIBIMP_EXPORT bool operator==(error const &lhs, error const &rhs) noexcept;
-  friend LIBIMP_EXPORT bool operator!=(error const &lhs, error const &rhs) noexcept;
-};
+LIBIMP_EXPORT error_code error() noexcept;
 
 /**
  * @brief Get system configuration information at run time
@@ -62,12 +48,5 @@ enum class info : std::int32_t {
 };
 LIBIMP_EXPORT result<std::int64_t> conf(info) noexcept;
 
-/**
- * @brief @brief Custom defined fmt_to method for imp::fmt
- */
-inline bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, error r) noexcept {
-  return fmt_to(ctx, error_msg(r.code()));
-}
-
 } // namespace sys
 LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index 25e449d7..2666ba71 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -19,20 +19,20 @@ namespace sys {
 #endif
 
 /**
- * @brief Get the system error code
+ * @brief Get the system error number
  * https://man7.org/linux/man-pages/man3/errno.3.html
  */
-result_code error_code() noexcept {
+result_code error_no() noexcept {
   auto err = errno;
   if (err == ENOERR) return {ENOERR};
   return {false, std::uint64_t(err)};
 }
 
 /**
- * @brief Set the system error code
+ * @brief Set the system error number
  * https://man7.org/linux/man-pages/man3/errno.3.html
  */
-void error_code(result_code code) noexcept {
+void error_no(result_code code) noexcept {
   errno = code ? ENOERR : (int)code.value();
 }
 
diff --git a/src/libimp/platform/win/codecvt.h b/src/libimp/platform/win/codecvt.h
index edcb785c..4a8dd85f 100644
--- a/src/libimp/platform/win/codecvt.h
+++ b/src/libimp/platform/win/codecvt.h
@@ -36,7 +36,7 @@ std::size_t cvt_cstr(char const *src, std::size_t slen, wchar_t *des, std::size_
   int cch_wc = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::MultiByteToWideChar(CP_ACP, 0, src, (int)slen, des, cch_wc);
   if (size_needed <= 0) {
-    log.error("failed: MultiByteToWideChar(CP_ACP). error = ", sys::error_code());
+    log.error("failed: MultiByteToWideChar(CP_ACP). error = ", sys::error_no());
   }
   return size_needed;
 }
@@ -51,7 +51,7 @@ std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char *des, std::size_
   int cb_mb = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::WideCharToMultiByte(CP_ACP, 0, src, (int)slen, des, cb_mb, NULL, NULL);
   if (size_needed <= 0) {
-    log.error("failed: WideCharToMultiByte(CP_ACP). error = ", sys::error_code());
+    log.error("failed: WideCharToMultiByte(CP_ACP). error = ", sys::error_no());
   }
   return size_needed;
 }
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index a24763aa..19d58616 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -21,10 +21,10 @@ LIBIMP_NAMESPACE_BEG_
 namespace sys {
 
 /**
- * @brief Get the system error code
+ * @brief Get the system error number
  * https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-getlasterror
  */
-result_code error_code() noexcept {
+result_code error_no() noexcept {
   auto err = ::GetLastError();
   if (err == ERROR_SUCCESS) {
     return {ERROR_SUCCESS};
@@ -33,10 +33,10 @@ result_code error_code() noexcept {
 }
 
 /**
- * @brief Set the system error code
+ * @brief Set the system error number
  * https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-setlasterror
  */
-void error_code(result_code code) noexcept {
+void error_no(result_code code) noexcept {
   DWORD err = code ? ERROR_SUCCESS : (DWORD)code.value();
   ::SetLastError(err);
 }
diff --git a/src/libimp/system.cpp b/src/libimp/system.cpp
index 8dfb15de..d71167bd 100644
--- a/src/libimp/system.cpp
+++ b/src/libimp/system.cpp
@@ -1,4 +1,6 @@
 
+#include "libimp/system.h"
+#include "libimp/fmt.h"
 #include "libimp/detect_plat.h"
 #if defined(LIBIMP_OS_WIN)
 # include "libimp/platform/win/system.h"
@@ -6,47 +8,30 @@
 # include "libimp/platform/posix/system.h"
 #endif
 
-LIBIMP_NAMESPACE_BEG_
-namespace sys {
+namespace {
 
-std::string error_msg(result_code code) noexcept {
-  LIBIMP_TRY {
-    return fmt("[", code.value(), ", \"", error_str(code), "\"]");
-  } LIBIMP_CATCH(...) {
-    return error_str(code);
+class system_error_category : public ::LIBIMP::error_category {
+public:
+  std::string name() const {
+    return "system";
   }
-}
-
-/// @brief The system error object.
-
-error::error() noexcept
-  : error(error_code()) {}
-
-error::error(result_code rc) noexcept
-  : r_code_(rc) {}
-
-result_code error::code() const noexcept {
-  return r_code_;
-}
-
-std::uint64_t error::value() const noexcept {
-  return r_code_.value();
-}
+  std::string message(::LIBIMP::result_code r) const {
+    return ::LIBIMP::fmt(r.value(), ::LIBIMP::sys::error_str(r));
+  }
+};
 
-error::operator bool() const noexcept {
-  return !!r_code_;
-}
+} // namespace
 
-std::string error::str() const noexcept {
-  return error_str(r_code_);
-}
+LIBIMP_NAMESPACE_BEG_
+namespace sys {
 
-bool operator==(error const &lhs, error const &rhs) noexcept {
-  return lhs.code() == rhs.code();
+error_category const &category() noexcept {
+  static system_error_category ec;
+  return ec;
 }
 
-bool operator!=(error const &lhs, error const &rhs) noexcept {
-  return lhs.code() != rhs.code();
+error_code error() noexcept {
+  return error_code{error_no(), category()};
 }
 
 } // namespace sys
diff --git a/src/libipc/platform/win/get_sa.h b/src/libipc/platform/win/get_sa.h
index 3964188e..60a64f89 100644
--- a/src/libipc/platform/win/get_sa.h
+++ b/src/libipc/platform/win/get_sa.h
@@ -30,7 +30,8 @@ inline LPSECURITY_ATTRIBUTES get_sa() {
       using namespace ::LIBIMP;
       log::grip log {"get_sa"};
       if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
-        log.error("failed: InitializeSecurityDescriptor(SECURITY_DESCRIPTOR_REVISION). error = ", sys::error());
+        log.error("failed: InitializeSecurityDescriptor(SECURITY_DESCRIPTOR_REVISION). "
+                  "error = ", sys::error());
         return;
       }
       if (!::SetSecurityDescriptorDacl(&sd_, TRUE, NULL, FALSE)) {
diff --git a/test/imp/test_imp_system.cpp b/test/imp/test_imp_system.cpp
index 81a6f6d4..d543596a 100644
--- a/test/imp/test_imp_system.cpp
+++ b/test/imp/test_imp_system.cpp
@@ -14,19 +14,16 @@
 #else
 #endif
 
-TEST(system, error_code) {
-  imp::sys::error_code({false, 111});
-  auto err = imp::sys::error_code();
+TEST(system, error_no) {
+  imp::sys::error_no({false, 111});
+  auto err = imp::sys::error_no();
   EXPECT_FALSE(err);
   EXPECT_EQ(err.value(), 111);
 
-  imp::sys::error_code({});
-  EXPECT_TRUE(imp::sys::error_code());
+  imp::sys::error_no({});
+  EXPECT_TRUE(imp::sys::error_no());
 
-  imp::sys::error e_obj {err};
-  EXPECT_EQ(err.value(), e_obj.value());
-  auto e_msg = imp::fmt(imp::sys::error_msg(imp::sys::error_code()));
-  EXPECT_EQ(e_msg, imp::fmt(imp::sys::error()));
+  auto e_msg = imp::sys::error_str(imp::sys::error_no());
   std::cout << e_msg << "\n";
 }
 

From c07471b7ff8499c652ece122604d5f8ca5a2729a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 18 Dec 2022 18:20:58 +0800
Subject: [PATCH 135/272] =?UTF-8?q?fix:=20=E2=80=98memcpy=E2=80=99=20is=20?=
 =?UTF-8?q?not=20a=20member=20of=20=E2=80=98std=E2=80=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 test/imp/test_imp_fmt.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test/imp/test_imp_fmt.cpp b/test/imp/test_imp_fmt.cpp
index 8836800b..3a50a660 100644
--- a/test/imp/test_imp_fmt.cpp
+++ b/test/imp/test_imp_fmt.cpp
@@ -1,6 +1,7 @@
 #define _CRT_SECURE_NO_WARNINGS
 #include <iostream>
 #include <tuple>
+#include <cstring>
 
 #include "gtest/gtest.h"
 

From 1f5dd463391b3e61d3dbe1402915c8b1a0c8fd7e Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 18 Dec 2022 20:15:31 +0800
Subject: [PATCH 136/272] fix: result error

---
 3rdparty/fmtlib-src          | 1 +
 3rdparty/googlebenchmark-src | 1 +
 3rdparty/googletest-src      | 1 +
 include/libimp/result.h      | 2 --
 src/libimp/fmt.cpp           | 7 ++++---
 test/imp/test_imp_span.cpp   | 2 +-
 6 files changed, 8 insertions(+), 6 deletions(-)
 create mode 160000 3rdparty/fmtlib-src
 create mode 160000 3rdparty/googlebenchmark-src
 create mode 160000 3rdparty/googletest-src

diff --git a/3rdparty/fmtlib-src b/3rdparty/fmtlib-src
new file mode 160000
index 00000000..a3370119
--- /dev/null
+++ b/3rdparty/fmtlib-src
@@ -0,0 +1 @@
+Subproject commit a33701196adfad74917046096bf5a2aa0ab0bb50
diff --git a/3rdparty/googlebenchmark-src b/3rdparty/googlebenchmark-src
new file mode 160000
index 00000000..361e8d1c
--- /dev/null
+++ b/3rdparty/googlebenchmark-src
@@ -0,0 +1 @@
+Subproject commit 361e8d1cfe0c6c36d30b39f1b61302ece5507320
diff --git a/3rdparty/googletest-src b/3rdparty/googletest-src
new file mode 160000
index 00000000..15460959
--- /dev/null
+++ b/3rdparty/googletest-src
@@ -0,0 +1 @@
+Subproject commit 15460959cbbfa20e66ef0b5ab497367e47fc0a04
diff --git a/include/libimp/result.h b/include/libimp/result.h
index 5ab78a7c..f7335562 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -132,8 +132,6 @@ class result : public TypeTraits {
 public:
   using type_traits_t = TypeTraits;
 
-  result() noexcept = default;
-
   template <typename... A, 
             typename = is_not_match<result, A...>,
             typename = decltype(type_traits_t::init_code(std::declval<result_code &>()
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index 39c34f2b..3eae1ed9 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -7,6 +7,7 @@
 #include <cstring>    // std::memcpy
 #include <algorithm>  // std::min
 #include <initializer_list>
+#include <cstdint>
 
 #include "libimp/codecvt.h"
 
@@ -116,16 +117,16 @@ span<char> fmt_of_float(span<char const> fstr, span<char const> const &l) {
 
 template <typename A /*a fundamental or pointer type*/>
 int sprintf(fmt_context &ctx, span<char const> const &sfmt, A a) {
-  for (int sz = -1;;) {
+  for (std::int32_t sz = -1;;) {
     auto sbuf = ctx.buffer(sz + 1);
-    if (sbuf.size() < (sz + 1)) {
+    if (sbuf.size() < std::size_t(sz + 1)) {
       return -1;
     }
     sz = std::snprintf(sbuf.data(), sbuf.size(), sfmt.data(), a);
     if (sz <= 0) {
       return sz;
     }
-    if (sz < sbuf.size()) {
+    if (std::size_t(sz) < sbuf.size()) {
       ctx.expend(sz);
       return sz;
     }
diff --git a/test/imp/test_imp_span.cpp b/test/imp/test_imp_span.cpp
index 630bca24..0304f7e5 100644
--- a/test/imp/test_imp_span.cpp
+++ b/test/imp/test_imp_span.cpp
@@ -20,7 +20,7 @@ TEST(span, span) {
   auto test_proc = [](auto &&buf, auto &&sp) {
     EXPECT_EQ(imp::countof(buf), sp.size());
     EXPECT_EQ(sizeof(buf[0]) * imp::countof(buf), sp.size_bytes());
-    for (int i = 0; i < sp.size(); ++i) {
+    for (std::size_t i = 0; i < sp.size(); ++i) {
       EXPECT_EQ(buf[i], sp[i]);
     }
   };

From 38806396992edb81a8117b02602ae79fc17bc384 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 18 Dec 2022 20:22:07 +0800
Subject: [PATCH 137/272] add: ut

---
 test/imp/test_imp_result.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/test/imp/test_imp_result.cpp b/test/imp/test_imp_result.cpp
index 99ed748c..dc96fdc4 100644
--- a/test/imp/test_imp_result.cpp
+++ b/test/imp/test_imp_result.cpp
@@ -71,6 +71,8 @@ TEST(result, fmt) {
     EXPECT_EQ(imp::fmt(r3), "[succ, value = 0]");
   }
   {
+    imp::result<int> r0;
+    EXPECT_EQ(imp::fmt(r0), imp::fmt(imp::result_code()));
     imp::result<int> r1 {false, -123};
     EXPECT_EQ(imp::fmt(r1), imp::fmt("[fail, value = ", -123, "]"));
     imp::result<void *> r2 {&r1};
@@ -82,5 +84,7 @@ TEST(result, fmt) {
     EXPECT_EQ(imp::fmt(r4), imp::fmt("[fail, value = ", nullptr, ", code = 0]"));
     r4 = {nullptr, 1234};
     EXPECT_EQ(imp::fmt(r4), imp::fmt("[fail, value = ", nullptr, ", code = 1234]"));
+    imp::result<int *> r5;
+    EXPECT_EQ(imp::fmt(r5), "[fail, value = null, code = 0]");
   }
 }
\ No newline at end of file

From 424bb73c94b5b5f333e3515d5f7a813e387421c9 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 24 Dec 2022 19:26:06 +0800
Subject: [PATCH 138/272] upd: comment style

---
 include/libconcur/concurrent.h       | 100 +++++++++++++--------------
 include/libconcur/def.h              |  14 ++--
 include/libconcur/element.h          |  18 ++---
 include/libconcur/queue.h            |   8 +--
 include/libimp/byte.h                |  36 +++++-----
 include/libimp/codecvt.h             |  14 ++--
 include/libimp/construct.h           |  16 ++---
 include/libimp/countof.h             |  10 +--
 include/libimp/def.h                 |  10 +--
 include/libimp/detect_plat.h         |  26 +++----
 include/libimp/enum_cast.h           |  10 +--
 include/libimp/error.h               |  32 ++++-----
 include/libimp/export.h              |  20 +++---
 include/libimp/fmt.h                 |  44 ++++++------
 include/libimp/fmt_cpo.h             |  12 ++--
 include/libimp/generic.h             |  20 +++---
 include/libimp/horrible_cast.h       |   6 +-
 include/libimp/log.h                 |  20 +++---
 include/libimp/nameof.h              |  24 +++----
 include/libimp/pimpl.h               |   8 +--
 include/libimp/result.h              |  33 ++++-----
 include/libimp/span.h                |  24 +++----
 include/libimp/system.h              |  22 +++---
 include/libipc/def.h                 |  10 +--
 include/libipc/shm.h                 |  30 ++++----
 include/libipc/spin_lock.h           |  16 ++---
 include/libpmr/allocator.h           |  28 ++++----
 include/libpmr/def.h                 |  10 +--
 include/libpmr/memory_resource.h     |  26 +++----
 src/libimp/codecvt.cpp               |  26 +++----
 src/libimp/fmt.cpp                   |  10 +--
 src/libimp/platform/gnuc/demangle.h  |  14 ++--
 src/libimp/platform/posix/system.h   |  12 ++--
 src/libimp/platform/win/codecvt.h    |   8 +--
 src/libimp/platform/win/demangle.h   |   4 +-
 src/libimp/platform/win/system.h     |  12 ++--
 src/libipc/platform/posix/def.h      |   4 +-
 src/libipc/platform/posix/shm_impl.h |  24 +++----
 src/libipc/platform/win/get_sa.h     |   8 +--
 src/libipc/platform/win/mmap_impl.h  |  44 ++++++------
 src/libipc/platform/win/shm_impl.h   |   4 +-
 src/libipc/platform/win/to_tchar.h   |   4 +-
 src/libipc/shm.cpp                   |   4 +-
 src/libipc/spin_lock.cpp             |  26 +++----
 src/libpmr/memory_resource.cpp       |  34 ++++-----
 test/imp/test_imp_result.cpp         |   3 +
 46 files changed, 447 insertions(+), 441 deletions(-)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index 87a9d120..f536e0b4 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -1,8 +1,8 @@
 /**
- * @file libconcur/concurrent.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define different policies for concurrent queue.
- * @date 2022-11-07
+ * \file libconcur/concurrent.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define different policies for concurrent queue.
+ * \date 2022-11-07
  */
 #pragma once
 
@@ -17,10 +17,10 @@
 
 LIBCONCUR_NAMESPACE_BEG_
 
-/// @brief The queue index type.
+/// \brief The queue index type.
 using index_t = std::uint32_t;
 
-/// @brief Multiplicity of the relationship.
+/// \brief Multiplicity of the relationship.
 namespace relation {
 
 class single {};
@@ -28,7 +28,7 @@ class multi  {};
 
 } // namespace relation
 
-/// @brief Transmission mode
+/// \brief Transmission mode
 namespace trans {
 
 class unicast   {};
@@ -36,52 +36,52 @@ class broadcast {};
 
 } // namespace trans
 
-/// @brief Determines whether type T can be implicitly converted to type U.
+/// \brief Determines whether type T can be implicitly converted to type U.
 template <typename T, typename U>
 using is_convertible = typename std::enable_if<std::is_convertible<T *, U *>::value>::type;
 
-/// @brief Check whether the context type is valid.
+/// \brief Check whether the context type is valid.
 template <typename T>
 using is_context = decltype(typename std::enable_if<std::is_convertible<decltype(
   std::declval<T>().valid()), bool>::value>::type(), 
   std::declval<index_t>() % std::declval<T>().circ_size);
 
 /**
- * @brief Calculate the corresponding queue position modulo the index value.
+ * \brief Calculate the corresponding queue position modulo the index value.
  * 
- * @tparam C a context type
- * @param ctx a context object
- * @param idx a context array index
- * @return index_t - a corresponding queue position
+ * \tparam C a context type
+ * \param ctx a context object
+ * \param idx a context array index
+ * \return index_t - a corresponding queue position
  */
 template <typename C, typename = is_context<C>>
 constexpr index_t trunc_index(C const &ctx, index_t idx) noexcept {
-  /// @remark `circ_size == 2^N` => `idx & (circ_size - 1)`
+  /// \remark `circ_size == 2^N` => `idx & (circ_size - 1)`
   return ctx.valid() ? (idx % ctx.circ_size) : 0;
 }
 
-/// @brief Producer algorithm implementation.
+/// \brief Producer algorithm implementation.
 template <typename TransModT, typename RelationT>
 struct producer;
 
-/// @brief Consumer algorithm implementation.
+/// \brief Consumer algorithm implementation.
 template <typename TransModT, typename RelationT>
 struct consumer;
 
 /**
- * @brief Algorithm definition under unicast transmission model.
+ * \brief Algorithm definition under unicast transmission model.
  * 
- * @ref A bounded wait-free(almost) zero-copy MPMC queue written in C++11.
+ * \ref A bounded wait-free(almost) zero-copy MPMC queue written in C++11.
  * Modified from MengRao/WFMPMC.
  * Copyright (c) 2018. Meng Rao (https://github.com/MengRao/WFMPMC).
 */
 
-/// @brief Single-write producer model implementation.
+/// \brief Single-write producer model implementation.
 template <>
 struct producer<trans::unicast, relation::single> {
 
   struct context_impl {
-    /// @brief Write index.
+    /// \brief Write index.
     alignas(cache_line_size) index_t w_idx {0};
   };
 
@@ -93,26 +93,26 @@ struct producer<trans::unicast, relation::single> {
     auto w_cur = trunc_index(ctx, w_idx);
     auto &elem = elems[w_cur];
     auto f_ct  = elem.get_flag();
-    /// @remark Verify index.
+    /// \remark Verify index.
     if ((f_ct != state::invalid_value) && 
         (f_ct != w_idx)) {
       return false; // full
     }
-    /// @remark Get a valid index and iterate backwards.
+    /// \remark Get a valid index and iterate backwards.
     ctx.w_idx += 1;
-    /// @remark Set data & flag.
+    /// \remark Set data & flag.
     elem.set_data(std::forward<U>(src));
     elem.set_flag(static_cast<index_t>(~w_idx));
     return true;
   }
 };
 
-/// @brief Multi-write producer model implementation.
+/// \brief Multi-write producer model implementation.
 template <>
 struct producer<trans::unicast, relation::multi> {
 
   struct context_impl {
-    /// @brief Write index.
+    /// \brief Write index.
     alignas(cache_line_size) std::atomic<index_t> w_idx {0};
   };
 
@@ -125,16 +125,16 @@ struct producer<trans::unicast, relation::multi> {
       auto w_cur = trunc_index(ctx, w_idx);
       auto &elem = elems[w_cur];
       auto f_ct  = elem.get_flag();
-      /// @remark Verify index.
+      /// \remark Verify index.
       if ((f_ct != state::invalid_value) && 
           (f_ct != w_idx)) {
         return false; // full
       }
-      /// @remark Get a valid index and iterate backwards.
+      /// \remark Get a valid index and iterate backwards.
       if (!ctx.w_idx.compare_exchange_weak(w_idx, w_idx + 1, std::memory_order_acq_rel)) {
         continue;
       }
-      /// @remark Set data & flag.
+      /// \remark Set data & flag.
       elem.set_data(std::forward<U>(src));
       elem.set_flag(static_cast<index_t>(~w_idx));
       return true;
@@ -142,12 +142,12 @@ struct producer<trans::unicast, relation::multi> {
   }
 };
 
-/// @brief Single-read consumer model implementation.
+/// \brief Single-read consumer model implementation.
 template <>
 struct consumer<trans::unicast, relation::single> {
 
   struct context_impl {
-    /// @brief Read index.
+    /// \brief Read index.
     alignas(cache_line_size) index_t r_idx {0};
   };
 
@@ -159,25 +159,25 @@ struct consumer<trans::unicast, relation::single> {
     auto r_cur = trunc_index(ctx, r_idx);
     auto &elem = elems[r_cur];
     auto f_ct  = elem.get_flag();
-    /// @remark Verify index.
+    /// \remark Verify index.
     if (f_ct != static_cast<index_t>(~r_idx)) {
       return false; // empty
     }
-    /// @remark Get a valid index and iterate backwards.
+    /// \remark Get a valid index and iterate backwards.
     ctx.r_idx += 1;
-    /// @remark Get data & set flag.
+    /// \remark Get data & set flag.
     des = elem.get_data();
     elem.set_flag(r_idx + static_cast<index_t>(elems.size()));
     return true;
   }
 };
 
-/// @brief Multi-read consumer model implementation.
+/// \brief Multi-read consumer model implementation.
 template <>
 struct consumer<trans::unicast, relation::multi> {
 
   struct context_impl {
-    /// @brief Read index.
+    /// \brief Read index.
     alignas(cache_line_size) std::atomic<index_t> r_idx {0};
   };
 
@@ -190,15 +190,15 @@ struct consumer<trans::unicast, relation::multi> {
       auto r_cur = trunc_index(ctx, r_idx);
       auto &elem = elems[r_cur];
       auto f_ct  = elem.get_flag();
-      /// @remark Verify index.
+      /// \remark Verify index.
       if (f_ct != static_cast<index_t>(~r_idx)) {
         return false; // empty
       }
-      /// @remark Get a valid index and iterate backwards.
+      /// \remark Get a valid index and iterate backwards.
       if (!ctx.r_idx.compare_exchange_weak(r_idx, r_idx + 1, std::memory_order_acq_rel)) {
         continue;
       }
-      /// @remark Get data & set flag.
+      /// \remark Get data & set flag.
       des = elem.get_data();
       elem.set_flag(r_idx + static_cast<index_t>(elems.size()));
       return true;
@@ -207,41 +207,41 @@ struct consumer<trans::unicast, relation::multi> {
 };
 
 /**
- * @brief Algorithm definition under broadcast transmission model.
+ * \brief Algorithm definition under broadcast transmission model.
 */
 
-/// @brief Single-write producer model implementation.
+/// \brief Single-write producer model implementation.
 template <>
 struct producer<trans::broadcast, relation::single> {
 };
 
-/// @brief Multi-write producer model implementation.
+/// \brief Multi-write producer model implementation.
 template <>
 struct producer<trans::broadcast, relation::multi> {
 };
 
-/// @brief Single-read consumer model implementation.
+/// \brief Single-read consumer model implementation.
 template <>
 struct consumer<trans::broadcast, relation::single> {
 };
 
-/// @brief Multi-read consumer model implementation.
+/// \brief Multi-read consumer model implementation.
 template <>
 struct consumer<trans::broadcast, relation::multi> {
 };
 
 /**
- * @brief Producer-consumer implementation.
+ * \brief Producer-consumer implementation.
  * 
- * @tparam TransModT transmission mode (trans::unicast/trans::broadcast)
- * @tparam ProdModT producer relationship model (relation::single/relation::multi)
- * @tparam ConsModT consumer relationship model (relation::single/relation::multi)
+ * \tparam TransModT transmission mode (trans::unicast/trans::broadcast)
+ * \tparam ProdModT producer relationship model (relation::single/relation::multi)
+ * \tparam ConsModT consumer relationship model (relation::single/relation::multi)
  */
 template <typename TransModT, typename ProdModT, typename ConsModT>
 struct prod_cons : producer<TransModT, ProdModT>
                  , consumer<TransModT, ConsModT> {
 
-  /// @brief Mixing producer and consumer context definitions.
+  /// \brief Mixing producer and consumer context definitions.
   struct context : producer<TransModT, ProdModT>::context_impl
                  , consumer<TransModT, ConsModT>::context_impl {
     index_t const circ_size;
@@ -254,7 +254,7 @@ struct prod_cons : producer<TransModT, ProdModT>
       : circ_size(static_cast<index_t>(elems.size())) {}
 
     constexpr bool valid() const noexcept {
-      /// @remark circ_size must be a power of two.
+      /// \remark circ_size must be a power of two.
       return (circ_size > 1) && ((circ_size & (circ_size - 1)) == 0);
     }
   };
diff --git a/include/libconcur/def.h b/include/libconcur/def.h
index d5200120..032f239e 100644
--- a/include/libconcur/def.h
+++ b/include/libconcur/def.h
@@ -1,8 +1,8 @@
 /**
- * @file libconcur/def.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define the trivial configuration information for concurrency.
- * @date 2022-11-07
+ * \file libconcur/def.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the trivial configuration information for concurrency.
+ * \date 2022-11-07
  */
 #pragma once
 
@@ -17,11 +17,11 @@
 
 LIBCONCUR_NAMESPACE_BEG_
 
-/// @brief Constants.
+/// \brief Constants.
 
 enum : std::size_t {
-  /// @brief Minimum offset between two objects to avoid false sharing.
-  /// @see https://en.cppreference.com/w/cpp/thread/hardware_destructive_interference_size
+  /// \brief Minimum offset between two objects to avoid false sharing.
+  /// \see https://en.cppreference.com/w/cpp/thread/hardware_destructive_interference_size
   cache_line_size =
 #if defined(LIBIMP_CPP_17) && defined(__cpp_lib_hardware_interference_size)
     ( std::hardware_destructive_interference_size < alignof(std::max_align_t) ) ? 64 
diff --git a/include/libconcur/element.h b/include/libconcur/element.h
index f53381b3..8216a687 100644
--- a/include/libconcur/element.h
+++ b/include/libconcur/element.h
@@ -1,8 +1,8 @@
 /**
- * @file libconcur/element.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define concurrent queue element abstraction.
- * @date 2022-11-19
+ * \file libconcur/element.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define concurrent queue element abstraction.
+ * \date 2022-11-19
  */
 #pragma once
 
@@ -20,11 +20,11 @@
 LIBCONCUR_NAMESPACE_BEG_
 namespace state {
 
-/// @brief The state flag type for the queue element.
+/// \brief The state flag type for the queue element.
 using flag_t = std::uint64_t;
 
 enum : flag_t {
-  /// @brief The invalid state value.
+  /// \brief The invalid state value.
   invalid_value = (std::numeric_limits<flag_t>::max)(),
 };
 
@@ -32,12 +32,12 @@ enum : flag_t {
 
 template <typename T>
 class element {
-  /// @brief Committed flag.
+  /// \brief Committed flag.
   alignas(cache_line_size) std::atomic<state::flag_t> f_ct_;
-  /// @brief The user data segment.
+  /// \brief The user data segment.
   T data_;
 
-  /// @brief Disable copy & move.
+  /// \brief Disable copy & move.
   element(element const &) = delete;
   element &operator=(element const &) = delete;
 
diff --git a/include/libconcur/queue.h b/include/libconcur/queue.h
index 485045b4..af17f7db 100644
--- a/include/libconcur/queue.h
+++ b/include/libconcur/queue.h
@@ -1,8 +1,8 @@
 /**
- * @file libconcur/queue.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define concurrent queue.
- * @date 2022-11-19
+ * \file libconcur/queue.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define concurrent queue.
+ * \date 2022-11-19
  */
 #pragma once
 
diff --git a/include/libimp/byte.h b/include/libimp/byte.h
index 88b43a0a..da646bea 100644
--- a/include/libimp/byte.h
+++ b/include/libimp/byte.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/byte.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define the byte type.
- * @date 2022-11-12
+ * \file libimp/byte.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the byte type.
+ * \date 2022-11-12
  */
 #pragma once
 
@@ -37,8 +37,8 @@ using is_not_byte =
 } // namespace detail
 
 /**
- * @brief A distinct type that implements the concept of byte as specified in the C++ language definition.
- * @see https://en.cppreference.com/w/cpp/types/byte
+ * \brief A distinct type that implements the concept of byte as specified in the C++ language definition.
+ * \see https://en.cppreference.com/w/cpp/types/byte
  */
 class byte {
   std::uint8_t bits_;
@@ -63,8 +63,8 @@ class byte {
 
 #ifdef LIBIMP_CPP_LIB_BYTE_
   explicit constexpr operator std::byte() const noexcept {
-    /// @brief C++17 relaxed enum class initialization rules.
-    /// @see https://en.cppreference.com/w/cpp/language/enum#enum_relaxed_init_cpp17
+    /// \brief C++17 relaxed enum class initialization rules.
+    /// \see https://en.cppreference.com/w/cpp/language/enum#enum_relaxed_init_cpp17
     return std::byte{bits_};
   }
 #endif // LIBIMP_CPP_LIB_BYTE_
@@ -79,7 +79,7 @@ class byte {
 };
 
 /**
- * @brief Non-member functions.
+ * \brief Non-member functions.
  */
 
 template <typename T, typename = detail::is_integral<T>>
@@ -87,7 +87,7 @@ constexpr T to_integer(byte b) noexcept {
   return T(b);
 }
 
-/// @brief std::operator<<, operator>>
+/// \brief std::operator<<, operator>>
 
 template <typename T, typename = detail::is_integral<T>>
 constexpr byte operator<<(byte b, T shift) noexcept {
@@ -99,7 +99,7 @@ constexpr byte operator>>(byte b, T shift) noexcept {
   return byte(to_integer<unsigned>(b) >> shift);
 }
 
-/// @brief std::operator<<=, operator>>=
+/// \brief std::operator<<=, operator>>=
 
 template <typename T, typename = detail::is_integral<T>>
 constexpr byte &operator<<=(byte &b, T shift) noexcept {
@@ -111,20 +111,20 @@ constexpr byte &operator>>=(byte &b, T shift) noexcept {
   return b = b >> shift;
 }
 
-/// @brief std::operator|, operator&, operator^, operator~
+/// \brief std::operator|, operator&, operator^, operator~
 
 constexpr byte operator|(byte l, byte r) noexcept { return byte(to_integer<unsigned>(l) | to_integer<unsigned>(r)); }
 constexpr byte operator&(byte l, byte r) noexcept { return byte(to_integer<unsigned>(l) & to_integer<unsigned>(r)); }
 constexpr byte operator^(byte l, byte r) noexcept { return byte(to_integer<unsigned>(l) ^ to_integer<unsigned>(r)); }
 constexpr byte operator~(byte b)         noexcept { return byte(~to_integer<unsigned>(b)); }
 
-/// @brief std::operator|=, operator&=, operator^=
+/// \brief std::operator|=, operator&=, operator^=
 
 constexpr byte &operator|=(byte &l, byte r) noexcept { return l = l | r; }
 constexpr byte &operator&=(byte &l, byte r) noexcept { return l = l & r; }
 constexpr byte &operator^=(byte &l, byte r) noexcept { return l = l ^ r; }
 
-/// @brief Cast pointer to byte*.
+/// \brief Cast pointer to byte*.
 
 template <typename T, typename = detail::is_not_byte<T>>
 byte *byte_cast(T *p) noexcept {
@@ -136,7 +136,7 @@ byte const *byte_cast(T const *p) noexcept {
   return reinterpret_cast<byte const *>(p);
 }
 
-/// @brief Cast byte* to a pointer of another type.
+/// \brief Cast byte* to a pointer of another type.
 
 template <typename T, typename = detail::is_not_byte<T>>
 T *byte_cast(byte *p) noexcept {
@@ -155,8 +155,8 @@ U *byte_cast(byte const *p) noexcept {
   return reinterpret_cast<U *>(p);
 }
 
-/// @brief Converts a span into a view of its underlying bytes.
-/// @see https://en.cppreference.com/w/cpp/container/span/as_bytes
+/// \brief Converts a span into a view of its underlying bytes.
+/// \see https://en.cppreference.com/w/cpp/container/span/as_bytes
 
 template <typename T, 
           typename Byte = typename std::conditional<std::is_const<T>::value, byte const, byte>::type>
@@ -164,7 +164,7 @@ auto as_bytes(span<T> s) noexcept -> span<Byte> {
   return {byte_cast(s.data()), s.size_bytes()};
 }
 
-/// @brief Custom defined fmt_to method for imp::fmt
+/// \brief Custom defined fmt_to method for imp::fmt
 namespace detail {
 
 inline bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, ::LIBIMP::byte b) {
diff --git a/include/libimp/codecvt.h b/include/libimp/codecvt.h
index 395980ba..1107a0a2 100644
--- a/include/libimp/codecvt.h
+++ b/include/libimp/codecvt.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/codecvt.h
- * @author mutouyun (orz@orzz.org)
- * @brief Character set conversion interface
- * @date 2022-08-07
+ * \file libimp/codecvt.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Character set conversion interface
+ * \date 2022-08-07
  */
 #pragma once
 
@@ -15,10 +15,10 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @brief The transform between UTF-8/16/32
+ * \brief The transform between UTF-8/16/32
  * 
- * @param des  The target string pointer can be nullptr
- * @param dlen The target string length can be 0
+ * \param des  The target string pointer can be nullptr
+ * \param dlen The target string length can be 0
  */
 template <typename CharT, typename CharU>
 LIBIMP_EXPORT std::size_t cvt_cstr(CharT const *src, std::size_t slen, CharU *des, std::size_t dlen) noexcept;
diff --git a/include/libimp/construct.h b/include/libimp/construct.h
index 8d39dd7f..99af50ca 100644
--- a/include/libimp/construct.h
+++ b/include/libimp/construct.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/construct.h
- * @author mutouyun (orz@orzz.org)
- * @brief Construct an object from a memory buffer
- * @date 2022-02-27
+ * \file libimp/construct.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Construct an object from a memory buffer
+ * \date 2022-02-27
  */
 #pragma once
 
@@ -18,8 +18,8 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @brief Creates an object at a given address, like 'construct_at' in c++20
- * @see https://en.cppreference.com/w/cpp/memory/construct_at
+ * \brief Creates an object at a given address, like 'construct_at' in c++20
+ * \see https://en.cppreference.com/w/cpp/memory/construct_at
 */
 
 template <typename T, typename... A>
@@ -39,8 +39,8 @@ auto construct(void *p, A &&... args)
 }
 
 /**
- * @brief Destroys an object at a given address, like 'destroy_at' in c++17
- * @see https://en.cppreference.com/w/cpp/memory/destroy_at
+ * \brief Destroys an object at a given address, like 'destroy_at' in c++17
+ * \see https://en.cppreference.com/w/cpp/memory/destroy_at
 */
 
 template <typename T>
diff --git a/include/libimp/countof.h b/include/libimp/countof.h
index 91f0e089..2b77cf5c 100644
--- a/include/libimp/countof.h
+++ b/include/libimp/countof.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/countof.h
- * @author mutouyun (orz@orzz.org)
- * @brief Returns the size of the given range
- * @date 2022-03-01
+ * \file libimp/countof.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Returns the size of the given range
+ * \date 2022-03-01
  */
 #pragma once
 
@@ -15,7 +15,7 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @see https://en.cppreference.com/w/cpp/iterator/size
+ * \see https://en.cppreference.com/w/cpp/iterator/size
 */
 
 namespace detail_countof {
diff --git a/include/libimp/def.h b/include/libimp/def.h
index 8fb25055..da61e14a 100644
--- a/include/libimp/def.h
+++ b/include/libimp/def.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/def.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define the trivial configuration information.
- * @date 2022-04-23
+ * \file libimp/def.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the trivial configuration information.
+ * \date 2022-04-23
  */
 #pragma once
 
@@ -15,6 +15,6 @@
 
 LIBIMP_NAMESPACE_BEG_
 
-/// @brief Constants.
+/// \brief Constants.
 
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
index c34f6010..12e2e7ef 100644
--- a/include/libimp/detect_plat.h
+++ b/include/libimp/detect_plat.h
@@ -1,12 +1,12 @@
 /**
- * @file libimp/detect_plat.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define platform detection related interfaces.
- * @date 2022-02-27
+ * \file libimp/detect_plat.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define platform detection related interfaces.
+ * \date 2022-02-27
  */
 #pragma once
 
-/// @brief OS check.
+/// \brief OS check.
 
 #if defined(WINCE) || defined(_WIN32_WCE)
 # define LIBIMP_OS_WINCE
@@ -35,7 +35,7 @@
 # define LIBIMP_OS_WIN
 #endif
 
-/// @brief Compiler check.
+/// \brief Compiler check.
 
 #if defined(_MSC_VER)
 # define LIBIMP_CC_MSVC      _MSC_VER
@@ -48,8 +48,8 @@
 # error "This compiler is unsupported."
 #endif
 
-/// @brief Instruction set.
-/// @see https://sourceforge.net/p/predef/wiki/Architectures/
+/// \brief Instruction set.
+/// \see https://sourceforge.net/p/predef/wiki/Architectures/
 
 #if defined(_M_X64) || defined(_M_AMD64) || \
     defined(__x86_64__) || defined(__x86_64) || \
@@ -74,7 +74,7 @@
 # define LIBIMP_INSTR_ARM
 #endif
 
-/// @brief Byte order.
+/// \brief Byte order.
 
 #if defined(__BYTE_ORDER__)
 # define LIBIMP_ENDIAN_BIG   (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
@@ -84,7 +84,7 @@
 # define LIBIMP_ENDIAN_LIT   (1)
 #endif
 
-/// @brief C++ version.
+/// \brief C++ version.
 
 #if (__cplusplus >= 202002L) && !defined(LIBIMP_CPP_20)
 # define LIBIMP_CPP_20
@@ -102,7 +102,7 @@
 # error "This C++ version is unsupported."
 #endif
 
-/// @brief C++ attributes.
+/// \brief C++ attributes.
 
 #if defined(__has_cpp_attribute)
 # if __has_cpp_attribute(fallthrough)
@@ -165,7 +165,7 @@
 #endif
 
 #if !defined(LIBIMP_NODISCARD)
-/// @see https://stackoverflow.com/questions/4226308/msvc-equivalent-of-attribute-warn-unused-result
+/// \see https://stackoverflow.com/questions/4226308/msvc-equivalent-of-attribute-warn-unused-result
 # if defined(LIBIMP_CC_GNUC) && (LIBIMP_CC_GNUC >= 4)
 #   define LIBIMP_NODISCARD __attribute__((warn_unused_result))
 # elif defined(LIBIMP_CC_MSVC) && (LIBIMP_CC_MSVC >= 1700)
@@ -175,7 +175,7 @@
 # endif
 #endif
 
-/// @see https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_exceptions.html
+/// \see https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_exceptions.html
 ///      https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros
 ///      https://stackoverflow.com/questions/6487013/programmatically-determine-whether-exceptions-are-enabled
 #if defined(__cpp_exceptions) && __cpp_exceptions || \
diff --git a/include/libimp/enum_cast.h b/include/libimp/enum_cast.h
index 31377a10..4b6e01d0 100644
--- a/include/libimp/enum_cast.h
+++ b/include/libimp/enum_cast.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/enum_cast.h
- * @author mutouyun (orz@orzz.org)
- * @brief Returns the underlying type of the given enum
- * @date 2022-03-01
+ * \file libimp/enum_cast.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Returns the underlying type of the given enum
+ * \date 2022-03-01
  */
 #pragma once
 
@@ -12,6 +12,8 @@
 
 LIBIMP_NAMESPACE_BEG_
 
+/// \brief Returns after converting the value to the underlying type of E.
+/// \see https://en.cppreference.com/w/cpp/types/underlying_type
 template <typename E>
 constexpr auto enum_cast(E e) noexcept {
   return static_cast<std::underlying_type_t<E>>(e);
diff --git a/include/libimp/error.h b/include/libimp/error.h
index 1cc59bdc..741b36a4 100644
--- a/include/libimp/error.h
+++ b/include/libimp/error.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/error.h
- * @author mutouyun (orz@orzz.org)
- * @brief A platform-dependent error code.
- * @date 2022-12-18
+ * \file libimp/error.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief A platform-dependent error code.
+ * \date 2022-12-18
  */
 #pragma once
 
@@ -16,8 +16,8 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @brief Serves as the base class for specific error category types.
- * @see https://en.cppreference.com/w/cpp/error/error_category
+ * \brief Serves as the base class for specific error category types.
+ * \see https://en.cppreference.com/w/cpp/error/error_category
  */
 class LIBIMP_EXPORT error_category {
 public:
@@ -27,47 +27,47 @@ class LIBIMP_EXPORT error_category {
   constexpr error_category() noexcept = default;
   virtual ~error_category() noexcept = default;
 
-  /// @brief observer
+  /// \brief observer
   virtual std::string name() const = 0;
   virtual std::string message(result_code r) const = 0;
 
-  /// @brief comparison function
+  /// \brief comparison function
   bool operator==(error_category const &rhs) const noexcept;
 };
 
 /**
- * @brief Identifies the generic error category.
- * @see https://en.cppreference.com/w/cpp/error/generic_category
+ * \brief Identifies the generic error category.
+ * \see https://en.cppreference.com/w/cpp/error/generic_category
  */
 LIBIMP_EXPORT error_category const &generic_category() noexcept;
 
 /**
- * @brief The error code object.
- * @see https://en.cppreference.com/w/cpp/error/error_code
+ * \brief The error code object.
+ * \see https://en.cppreference.com/w/cpp/error/error_code
  */
 class LIBIMP_EXPORT error_code {
   result_code r_code_;
   error_category const *ec_;
 
 public:
-  /// @brief constructors
+  /// \brief constructors
   error_code() noexcept;
   error_code(result_code r, error_category const &ec) noexcept;
 
-  /// @brief observers
+  /// \brief observers
   result_code code() const noexcept;
   result_type value() const noexcept;
   error_category const &category() const noexcept;
   std::string message() const;
   explicit operator bool() const noexcept;
 
-  /// @brief comparison functions
+  /// \brief comparison functions
   friend LIBIMP_EXPORT bool operator==(error_code const &lhs, error_code const &rhs) noexcept;
   friend LIBIMP_EXPORT bool operator!=(error_code const &lhs, error_code const &rhs) noexcept;
 };
 
 /**
- * @brief @brief Custom defined fmt_to method for imp::fmt
+ * \brief @brief Custom defined fmt_to method for imp::fmt
  */
 namespace detail {
 
diff --git a/include/libimp/export.h b/include/libimp/export.h
index 8d1d4759..6ba509ca 100644
--- a/include/libimp/export.h
+++ b/include/libimp/export.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/export.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define the symbol export interfaces
- * @date 2022-02-27
+ * \file libimp/export.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the symbol export interfaces
+ * \date 2022-02-27
  */
 #pragma once
 
@@ -15,10 +15,10 @@
 
 #else // defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
 
-/*
- * Compiler & system detection for LIBIMP_DECL_EXPORT & LIBIMP_DECL_IMPORT.
+/**
+ * \brief Compiler & system detection for LIBIMP_DECL_EXPORT & LIBIMP_DECL_IMPORT.
  * Not using QtCore cause it shouldn't depend on Qt.
-*/
+ */
 # if defined(LIBIMP_CC_MSVC) || defined(LIBIMP_OS_WIN)
 #   define LIBIMP_DECL_EXPORT __declspec(dllexport)
 #   define LIBIMP_DECL_IMPORT __declspec(dllimport)
@@ -32,9 +32,9 @@
 
 #endif // defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
 
-/*
- * Define LIBIMP_EXPORT for exporting function & class.
-*/
+/**
+ * \brief Define LIBIMP_EXPORT for exporting function & class.
+ */
 #ifndef LIBIMP_EXPORT
 # if defined(LIBIMP_LIBRARY_SHARED_BUILDING__)
 #   define LIBIMP_EXPORT LIBIMP_DECL_EXPORT
diff --git a/include/libimp/fmt.h b/include/libimp/fmt.h
index fe901dc7..373fe120 100644
--- a/include/libimp/fmt.h
+++ b/include/libimp/fmt.h
@@ -1,10 +1,10 @@
 /**
- * @file libimp/fmt.h
- * @author mutouyun (orz@orzz.org)
- * @brief String formatting.
- * @date 2022-11-26
+ * \file libimp/fmt.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief String formatting.
+ * \date 2022-11-26
  * 
- * @remarks The current performance is not high, 
+ * \remarks The current performance is not high, 
  * because I use std::sprintf directly for formatting for convenience.
  */
 #pragma once
@@ -25,7 +25,7 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @brief The format string reference wrapper.
+ * \brief The format string reference wrapper.
  */
 template <typename T>
 struct fmt_ref {
@@ -34,12 +34,12 @@ struct fmt_ref {
 };
 
 /**
- * @brief Conversion specifiers.
+ * \brief Conversion specifiers.
  * 
- * @remarks Just like printf, the format string is of the form
+ * \remarks Just like printf, the format string is of the form
  * [flags][field_width][.precision][conversion_character]
  * 
- * @see http://personal.ee.surrey.ac.uk/Personal/R.Bowden/C/printf.html
+ * \see http://personal.ee.surrey.ac.uk/Personal/R.Bowden/C/printf.html
  */
 template <std::size_t N>
 auto spec(char const (&fstr)[N]) noexcept {
@@ -50,10 +50,10 @@ auto spec(char const (&fstr)[N]) noexcept {
 }
 
 /**
- * @brief String formatting function.
+ * \brief String formatting function.
  * 
- * @param args arguments that support the fmt output
- * @return an empty string if the fmt output fails 
+ * \param args arguments that support the fmt output
+ * \return an empty string if the fmt output fails 
  */
 template <typename... A>
 LIBIMP_NODISCARD std::string fmt(A &&...args) {
@@ -65,13 +65,13 @@ LIBIMP_NODISCARD std::string fmt(A &&...args) {
   return {};
 }
 
-/// @brief String types.
+/// \brief String types.
 LIBIMP_EXPORT bool to_string(fmt_context &ctx, char const *       a) noexcept;
 LIBIMP_EXPORT bool to_string(fmt_context &ctx, std::string const &a) noexcept;
 LIBIMP_EXPORT bool to_string(fmt_context &ctx, char const *       a, span<char const> fstr) noexcept;
        inline bool to_string(fmt_context &ctx, std::string const &a, span<char const> fstr) noexcept { return to_string(ctx, a.c_str(), fstr); }
 
-/// @brief Character to string conversion.
+/// \brief Character to string conversion.
 LIBIMP_EXPORT bool to_string(fmt_context &ctx, char     a) noexcept;
 #if defined(LIBIMP_CPP_20)
        inline bool to_string(fmt_context &ctx, char8_t  a) noexcept { return to_string(ctx, (char)a); }
@@ -80,7 +80,7 @@ LIBIMP_EXPORT bool to_string(fmt_context &ctx, wchar_t  a) noexcept;
 LIBIMP_EXPORT bool to_string(fmt_context &ctx, char16_t a) noexcept;
 LIBIMP_EXPORT bool to_string(fmt_context &ctx, char32_t a) noexcept;
 
-/// @brief Conversion of numeric types to strings.
+/// \brief Conversion of numeric types to strings.
 LIBIMP_EXPORT bool to_string(fmt_context &ctx,   signed short     a, span<char const> fstr = {}) noexcept;
 LIBIMP_EXPORT bool to_string(fmt_context &ctx, unsigned short     a, span<char const> fstr = {}) noexcept;
 LIBIMP_EXPORT bool to_string(fmt_context &ctx,   signed int       a, span<char const> fstr = {}) noexcept;
@@ -92,29 +92,29 @@ LIBIMP_EXPORT bool to_string(fmt_context &ctx, unsigned long long a, span<char c
        inline bool to_string(fmt_context &ctx,   signed char      a, span<char const> fstr = {}) noexcept { return to_string(ctx,      (int)a, fstr); }
        inline bool to_string(fmt_context &ctx, unsigned char      a, span<char const> fstr = {}) noexcept { return to_string(ctx, (unsigned)a, fstr); }
 
-/// @brief Conversion of floating point type to strings.
+/// \brief Conversion of floating point type to strings.
 LIBIMP_EXPORT bool to_string(fmt_context &ctx,      double a, span<char const> fstr = {}) noexcept;
 LIBIMP_EXPORT bool to_string(fmt_context &ctx, long double a, span<char const> fstr = {}) noexcept;
        inline bool to_string(fmt_context &ctx, float       a, span<char const> fstr = {}) noexcept { return to_string(ctx, (double)a, fstr); }
 
-/// @brief Pointer.
+/// \brief Pointer.
 LIBIMP_EXPORT bool to_string(fmt_context &ctx, std::nullptr_t) noexcept;
 template <typename T,
           typename = std::enable_if_t<std::is_same<T, void>::value>>
 LIBIMP_EXPORT bool to_string(fmt_context &ctx, T const volatile *a) noexcept;
 
-/// @brief Date and time.
+/// \brief Date and time.
 LIBIMP_EXPORT bool to_string(fmt_context &ctx, std::tm const &a, span<char const> fstr = {}) noexcept;
 
 namespace detail {
 
 /**
- * @brief Convert std::time_t to std::string.
- * @return an empty string if the conversion fails
+ * \brief Convert std::time_t to std::string.
+ * \return an empty string if the conversion fails
  */
 inline bool time_to_string(fmt_context &ctx, std::time_t tt, span<char const> fstr) noexcept {
 #if defined(LIBIMP_CC_MSVC)
-  /// @see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/localtime-s-localtime32-s-localtime64-s
+  /// \see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/localtime-s-localtime32-s-localtime64-s
   std::tm tm {};
   if (::localtime_s(&tm, &tt) != 0) {
     return {};
@@ -133,7 +133,7 @@ bool to_string(fmt_context &ctx, std::chrono::time_point<Clock, Duration> const
 }
 
 /**
- * @brief Predefined fmt_to method
+ * \brief Predefined fmt_to method
  */
 namespace detail {
 
diff --git a/include/libimp/fmt_cpo.h b/include/libimp/fmt_cpo.h
index dbb28bd7..ef17a1ff 100644
--- a/include/libimp/fmt_cpo.h
+++ b/include/libimp/fmt_cpo.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/fmt_cpo.h
- * @author mutouyun (orz@orzz.org)
- * @brief String formatting CPO.
- * @date 2022-11-28
+ * \file libimp/fmt_cpo.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief String formatting CPO.
+ * \date 2022-11-28
  */
 #pragma once
 
@@ -18,7 +18,7 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @brief The context of fmt.
+ * \brief The context of fmt.
  */
 class LIBIMP_EXPORT fmt_context {
   std::string &joined_;
@@ -36,7 +36,7 @@ class LIBIMP_EXPORT fmt_context {
 };
 
 /**
- * @brief Supports custom fmt_to methods for imp::fmt.
+ * \brief Supports custom fmt_to methods for imp::fmt.
  */
 namespace detail {
 
diff --git a/include/libimp/generic.h b/include/libimp/generic.h
index 6ef09137..37c813cd 100644
--- a/include/libimp/generic.h
+++ b/include/libimp/generic.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/generic.h
- * @author mutouyun (orz@orzz.org)
- * @brief Tools for generic programming.
- * @date 2022-03-01
+ * \file libimp/generic.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Tools for generic programming.
+ * \date 2022-03-01
  */
 #pragma once
 
@@ -14,15 +14,15 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @brief Utility metafunction that maps a sequence of any types to the type void
- * @see https://en.cppreference.com/w/cpp/types/void_t
+ * \brief Utility metafunction that maps a sequence of any types to the type void
+ * \see https://en.cppreference.com/w/cpp/types/void_t
 */
 template <typename...>
 using void_t = void;
 
 /**
- * @brief A general pattern for supporting customisable functions
- * @see https://www.open-std.org/jtc1/sc22/WG21/docs/papers/2019/p1895r0.pdf
+ * \brief A general pattern for supporting customisable functions
+ * \see https://www.open-std.org/jtc1/sc22/WG21/docs/papers/2019/p1895r0.pdf
 */
 namespace detail {
 
@@ -42,8 +42,8 @@ struct tag_invoke_t {
 constexpr detail::tag_invoke_t tag_invoke {};
 
 /**
- * @brief Circumventing forwarding reference may override copy and move constructs.
- * @see https://mpark.github.io/programming/2014/06/07/beware-of-perfect-forwarding-constructors/
+ * \brief Circumventing forwarding reference may override copy and move constructs.
+ * \see https://mpark.github.io/programming/2014/06/07/beware-of-perfect-forwarding-constructors/
  */
 namespace detail {
 
diff --git a/include/libimp/horrible_cast.h b/include/libimp/horrible_cast.h
index cce6ef7f..39398814 100644
--- a/include/libimp/horrible_cast.h
+++ b/include/libimp/horrible_cast.h
@@ -1,7 +1,7 @@
 /**
- * @file libimp/horrible_cast.h
- * @author mutouyun (orz@orzz.org)
- * @date 2022-04-17
+ * \file libimp/horrible_cast.h
+ * \author mutouyun (orz@orzz.org)
+ * \date 2022-04-17
  */
 #pragma once
 
diff --git a/include/libimp/log.h b/include/libimp/log.h
index 8e9c4913..73dc3172 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/log.h
- * @author mutouyun (orz@orzz.org)
- * @brief Simple log output component.
- * @date 2022-05-22
+ * \file libimp/log.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Simple log output component.
+ * \date 2022-05-22
  */
 #pragma once
 
@@ -39,7 +39,7 @@ struct context {
 LIBIMP_EXPORT std::string to_string(context &&) noexcept;
 LIBIMP_EXPORT bool to_string(fmt_context &ctx, context &&) noexcept;
 
-/// @brief Custom defined fmt_to method for imp::fmt
+/// \brief Custom defined fmt_to method for imp::fmt
 template <typename T>
 bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, context &&arg) noexcept {
   return ::LIBIMP::log::to_string(ctx, std::move(arg));
@@ -121,7 +121,7 @@ class LIBIMP_EXPORT printer {
   printer() noexcept = default;
 
   template <typename T, 
-            /// @remark generic constructor may shadow the default copy constructor
+            /// \remark generic constructor may shadow the default copy constructor
             typename = std::enable_if_t<!std::is_same<printer, T>::value>>
   printer(T &p) noexcept
     : objp_  (static_cast<void *>(&p))
@@ -131,17 +131,17 @@ class LIBIMP_EXPORT printer {
   void output(context) noexcept;
 };
 
-/// @brief Standard console output.
+/// \brief Standard console output.
 class LIBIMP_EXPORT std_t {
 public:
   void output(log::level, std::string &&) noexcept;
 };
 
-/// @brief Standard console output object.
+/// \brief Standard console output object.
 LIBIMP_EXPORT extern std_t std_out;
 
 /**
- * @brief Log information grips.
+ * \brief Log information grips.
  */
 class grip {
   printer printer_;
@@ -160,7 +160,7 @@ class grip {
         fmt(std::forward<A>(args)...),
       };
     } LIBIMP_CATCH(std::exception const &e) {
-      /// @remark [TBD] std::string constructor may throw an exception
+      /// \remark [TBD] std::string constructor may throw an exception
       ctx = {
         level::failed, std::chrono::system_clock::now(), func_, e.what(),
       };
diff --git a/include/libimp/nameof.h b/include/libimp/nameof.h
index 84a1dbc5..0e1396d9 100644
--- a/include/libimp/nameof.h
+++ b/include/libimp/nameof.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/nameof.h
- * @author mutouyun (orz@orzz.org)
- * @brief Gets the name string of a type.
- * @date 2022-11-26
+ * \file libimp/nameof.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Gets the name string of a type.
+ * \date 2022-11-26
  */
 #pragma once
 
@@ -16,20 +16,20 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @brief The conventional way to obtain demangled symbol name.
- * @see https://www.boost.org/doc/libs/1_80_0/libs/core/doc/html/core/demangle.html
+ * \brief The conventional way to obtain demangled symbol name.
+ * \see https://www.boost.org/doc/libs/1_80_0/libs/core/doc/html/core/demangle.html
  * 
- * @param name the mangled name
- * @return std::string a human-readable demangled type name
+ * \param name the mangled name
+ * \return std::string a human-readable demangled type name
  */
 std::string demangle(span<char const> name) noexcept;
 
 /**
- * @brief Returns an implementation defined string containing the name of the type.
- * @see https://en.cppreference.com/w/cpp/types/type_info/name
+ * \brief Returns an implementation defined string containing the name of the type.
+ * \see https://en.cppreference.com/w/cpp/types/type_info/name
  * 
- * @tparam T a type
- * @return std::string a human-readable demangled type name
+ * \tparam T a type
+ * \return std::string a human-readable demangled type name
  */
 template <typename T>
 std::string nameof() noexcept {
diff --git a/include/libimp/pimpl.h b/include/libimp/pimpl.h
index 9e018f0c..63992d05 100644
--- a/include/libimp/pimpl.h
+++ b/include/libimp/pimpl.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/pimpl.h
- * @author mutouyun (orz@orzz.org)
- * @brief Pointer To Implementation (pImpl) idiom
- * @date 2022-02-27
+ * \file libimp/pimpl.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Pointer To Implementation (pImpl) idiom
+ * \date 2022-02-27
  */
 #pragma once
 
diff --git a/include/libimp/result.h b/include/libimp/result.h
index f7335562..9c5f813d 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -1,13 +1,14 @@
 /**
- * @file libimp/result.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define the return value type with a status code
- * @date 2022-04-17
+ * \file libimp/result.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the return value type with a status code
+ * \date 2022-04-17
  */
 #pragma once
 
 #include <type_traits>
 #include <string>
+#include <tuple>
 #include <cstdint>
 
 #include "libimp/def.h"
@@ -18,10 +19,10 @@
 
 LIBIMP_NAMESPACE_BEG_
 
-using result_type = std::uint64_t;
+using result_type = std::tuple<std::uint64_t, bool>;
 
 /**
- * @brief Use the least significant (in Little-Endian) of 
+ * \brief Use the least significant (in Little-Endian) of 
  * a 64-bit unsigned integer to indicate success or failure,
  * so the data significant bit cannot exceed 63 bits.
  */
@@ -62,7 +63,7 @@ namespace detail_result {
 
 template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
-  /// @brief Custom initialization.
+  /// \brief Custom initialization.
   constexpr static void init_code(result_code &code) noexcept {
     code = {};
   }
@@ -73,17 +74,17 @@ struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
     init_code(code, true, value);
   }
 
-  /// @brief Custom default value.
+  /// \brief Custom default value.
   constexpr static T default_value() noexcept {
     return 0;
   }
 
-  /// @brief Custom type conversions.
+  /// \brief Custom type conversions.
   constexpr static T cast_from_code(result_code code) noexcept {
     return static_cast<T>(code.value());
   }
 
-  /// @brief Custom formatted output.
+  /// \brief Custom formatted output.
   static std::string format(result<T> const &r) noexcept {
     return fmt(*r);
   }
@@ -91,7 +92,7 @@ struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
 
 template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
-  /// @brief Custom initialization.
+  /// \brief Custom initialization.
   constexpr static void init_code(result_code &code, T value = default_value()) noexcept {
     code = {default_value() != value, reinterpret_cast<result_type>(value)};
   }
@@ -102,17 +103,17 @@ struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
     code = {false, r};
   }
 
-  /// @brief Custom default value.
+  /// \brief Custom default value.
   constexpr static T default_value() noexcept {
     return nullptr;
   }
 
-  /// @brief Custom type conversions.
+  /// \brief Custom type conversions.
   constexpr static T cast_from_code(result_code code) noexcept {
     return code.ok() ? reinterpret_cast<T>(code.value()) : default_value();
   }
 
-  /// @brief Custom formatted output.
+  /// \brief Custom formatted output.
   static std::string format(result<T> const &r) noexcept {
     if LIBIMP_LIKELY(r) {
       return fmt(static_cast<void *>(*r));
@@ -126,7 +127,7 @@ struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
 template <typename T, typename TypeTraits>
 class result : public TypeTraits {
 
-  /// @brief Internal data is stored using result_code.
+  /// \brief Internal data is stored using result_code.
   result_code code_;
 
 public:
@@ -156,7 +157,7 @@ class result : public TypeTraits {
   friend bool operator!=(result const &lhs, result const &rhs) noexcept { return lhs.code_ != rhs.code_; }
 };
 
-/// @brief Custom defined fmt_to method for imp::fmt
+/// \brief Custom defined fmt_to method for imp::fmt
 namespace detail {
 
 inline bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, result_code r) {
diff --git a/include/libimp/span.h b/include/libimp/span.h
index 7a781829..814b584f 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/span.h
- * @author mutouyun (orz@orzz.org)
- * @brief Describes an object that can refer to a contiguous sequence of objects
- * @date 2022-10-16
+ * \file libimp/span.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Describes an object that can refer to a contiguous sequence of objects
+ * \date 2022-10-16
  */
 #pragma once
 
@@ -28,7 +28,7 @@
 LIBIMP_NAMESPACE_BEG_
 namespace detail {
 
-/// @brief Helper trait for span.
+/// \brief Helper trait for span.
 
 template <typename From, typename To>
 using array_convertible = std::is_convertible<From(*)[], To(*)[]>;
@@ -56,9 +56,9 @@ using is_sized_sentinel_for =
   typename std::enable_if<std::is_convertible<decltype(std::declval<S>() - std::declval<I>()), 
                           std::ptrdiff_t>::value>::type;
 
-/// @brief Obtain the address represented by p 
+/// \brief Obtain the address represented by p 
 ///        without forming a reference to the object pointed to by p.
-/// @see https://en.cppreference.com/w/cpp/memory/to_address
+/// \see https://en.cppreference.com/w/cpp/memory/to_address
 
 template<typename T>
 constexpr T *to_address(T *ptr) noexcept {
@@ -76,8 +76,8 @@ constexpr auto to_address(T const &ptr)
 } // namespace detail
 
 /**
- * @brief A simple implementation of span.
- * @see https://en.cppreference.com/w/cpp/container/span
+ * \brief A simple implementation of span.
+ * \see https://en.cppreference.com/w/cpp/container/span
  */
 template <typename T>
 class span {
@@ -205,7 +205,7 @@ class span {
   }
 };
 
-/// @brief Support for span equals comparison.
+/// \brief Support for span equals comparison.
 
 template <typename T, typename U, 
           typename = decltype(std::declval<T>() == std::declval<U>())>
@@ -219,9 +219,9 @@ bool operator==(span<T> a, span<U> b) noexcept {
   return true;
 }
 
-/// @brief Constructs an object of type T and wraps it in a span.
+/// \brief Constructs an object of type T and wraps it in a span.
 /// Before C++17, template argument deduction for class templates was not supported.
-/// @see https://en.cppreference.com/w/cpp/language/template_argument_deduction
+/// \see https://en.cppreference.com/w/cpp/language/template_argument_deduction
 
 template <typename T>
 auto make_span(T *arr, std::size_t count) noexcept -> span<T> {
diff --git a/include/libimp/system.h b/include/libimp/system.h
index 469b5209..f5967bb3 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -1,8 +1,8 @@
 /**
- * @file libimp/system.h
- * @author mutouyun (orz@orzz.org)
- * @brief Isolation and encapsulation of system APIs
- * @date 2022-08-07
+ * \file libimp/system.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Isolation and encapsulation of system APIs
+ * \date 2022-08-07
  */
 #pragma once
 
@@ -18,30 +18,30 @@ LIBIMP_NAMESPACE_BEG_
 namespace sys {
 
 /**
- * @brief Get/Set the system error number
+ * \brief Get/Set the system error number
  */
 LIBIMP_EXPORT result_code error_no() noexcept;
 LIBIMP_EXPORT void error_no(result_code) noexcept;
 
 /**
- * @brief Gets a text description of the system error
+ * \brief Gets a text description of the system error
  */
 LIBIMP_EXPORT std::string error_str(result_code) noexcept;
 
 /**
- * @brief Identifies the operating system error category.
- * @see https://en.cppreference.com/w/cpp/error/system_category
+ * \brief Identifies the operating system error category.
+ * \see https://en.cppreference.com/w/cpp/error/system_category
  */
 LIBIMP_EXPORT error_category const &category() noexcept;
 
 /**
- * @brief A platform-dependent error code.
- * @see https://en.cppreference.com/w/cpp/error/error_code
+ * \brief A platform-dependent error code.
+ * \see https://en.cppreference.com/w/cpp/error/error_code
  */
 LIBIMP_EXPORT error_code error() noexcept;
 
 /**
- * @brief Get system configuration information at run time
+ * \brief Get system configuration information at run time
  */
 enum class info : std::int32_t {
   page_size,
diff --git a/include/libipc/def.h b/include/libipc/def.h
index 3b121d16..c849a729 100755
--- a/include/libipc/def.h
+++ b/include/libipc/def.h
@@ -1,8 +1,8 @@
 /**
- * @file libipc/def.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define the trivial configuration information.
- * @date 2022-02-27
+ * \file libipc/def.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the trivial configuration information.
+ * \date 2022-02-27
  */
 #pragma once
 
@@ -15,7 +15,7 @@
 
 LIBIPC_NAMESPACE_BEG_
 
-/// @brief Constants.
+/// \brief Constants.
 
 struct prot {
   using type = std::uint32_t;
diff --git a/include/libipc/shm.h b/include/libipc/shm.h
index ba87e339..9e05b36a 100644
--- a/include/libipc/shm.h
+++ b/include/libipc/shm.h
@@ -1,8 +1,8 @@
 /**
- * @file libipc/shm.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define the shared memory access interface
- * @date 2022-04-17
+ * \file libipc/shm.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the shared memory access interface
+ * \date 2022-04-17
  */
 #pragma once
 
@@ -19,32 +19,32 @@ LIBIPC_NAMESPACE_BEG_
 struct shm_handle;
 using shm_t = shm_handle *;
 
-/// @brief Create a new shared memory handle with a name of the shared memory file.
+/// \brief Create a new shared memory handle with a name of the shared memory file.
 LIBIMP_EXPORT ::LIBIMP::result<shm_t> shm_open(std::string name, 
                                                 std::size_t size = 0,
                                                 mode::type = mode::create | mode::open) noexcept;
 
-/// @brief Close the shared memory handle.
+/// \brief Close the shared memory handle.
 LIBIMP_EXPORT ::LIBIMP::result_code shm_close(shm_t) noexcept;
 
-/// @brief Gets a memory pointer based on the shared memory handle.
-/// @return nullptr on failure.
+/// \brief Gets a memory pointer based on the shared memory handle.
+/// \return nullptr on failure.
 LIBIMP_EXPORT void *shm_get(shm_t) noexcept;
 
-/// @brief Gets the memory size based on the shared memory handle.
-/// @return 0 on failure.
+/// \brief Gets the memory size based on the shared memory handle.
+/// \return 0 on failure.
 LIBIMP_EXPORT std::size_t shm_size(shm_t) noexcept;
 
-/// @brief Sets the memory size based on the shared memory handle.
-/// @remark [TBD]
+/// \brief Sets the memory size based on the shared memory handle.
+/// \remark [TBD]
 LIBIMP_EXPORT ::LIBIMP::result_code shm_size(shm_t, std::size_t) noexcept;
 
-/// @brief Gets the name of the shared memory file based on the shared memory handle.
-/// @return empty string on failure.
+/// \brief Gets the name of the shared memory file based on the shared memory handle.
+/// \return empty string on failure.
 LIBIMP_EXPORT std::string shm_name(shm_t) noexcept;
 
 /**
- * @brief The shared memory object.
+ * \brief The shared memory object.
  */
 class LIBIMP_EXPORT shared_memory {
   shm_t shm_;
diff --git a/include/libipc/spin_lock.h b/include/libipc/spin_lock.h
index 1e374d25..c4a4059e 100644
--- a/include/libipc/spin_lock.h
+++ b/include/libipc/spin_lock.h
@@ -1,8 +1,8 @@
 /**
- * @file libipc/spin_lock.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define spin locks
- * @date 2022-02-27
+ * \file libipc/spin_lock.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define spin locks
+ * \date 2022-02-27
  */
 #pragma once
 
@@ -18,12 +18,12 @@
 LIBIPC_NAMESPACE_BEG_
 
 /**
- * @brief Gives hint to processor that improves performance of spin-wait loops.
+ * \brief Gives hint to processor that improves performance of spin-wait loops.
 */
 LIBIMP_EXPORT void pause() noexcept;
 
 /**
- * @brief Yield to other threads
+ * \brief Yield to other threads
 */
 
 template <typename K>
@@ -60,7 +60,7 @@ inline void sleep(K &k) {
 }
 
 /**
- * @brief Basic spin lock
+ * \brief Basic spin lock
 */
 class LIBIMP_EXPORT spin_lock {
   std::atomic<unsigned> lc_ {0};
@@ -71,7 +71,7 @@ class LIBIMP_EXPORT spin_lock {
 };
 
 /**
- * @brief Support for shared mode spin lock
+ * \brief Support for shared mode spin lock
 */
 class LIBIMP_EXPORT rw_lock {
   std::atomic<unsigned> lc_ {0};
diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index c6f58754..da5de388 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -1,8 +1,8 @@
 /**
- * @file libpmr/allocator.h
- * @author mutouyun (orz@orzz.org)
- * @brief A generic polymorphic memory allocator.
- * @date 2022-11-13
+ * \file libpmr/allocator.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief A generic polymorphic memory allocator.
+ * \date 2022-11-13
  */
 #pragma once
 
@@ -19,15 +19,15 @@
 LIBPMR_NAMESPACE_BEG_
 
 /**
- * @brief An allocator which exhibits different allocation behavior 
+ * \brief An allocator which exhibits different allocation behavior 
  * depending upon the memory resource from which it is constructed.
  * 
- * @remarks Unlike std::pmr::polymorphic_allocator, it does not 
+ * \remarks Unlike std::pmr::polymorphic_allocator, it does not 
  * rely on a specific inheritance relationship and only restricts 
  * the interface behavior of the incoming memory resource object to 
  * conform to std::pmr::memory_resource.
  * 
- * @see https://en.cppreference.com/w/cpp/memory/memory_resource
+ * \see https://en.cppreference.com/w/cpp/memory/memory_resource
  *      https://en.cppreference.com/w/cpp/memory/polymorphic_allocator
  */
 class LIBIMP_EXPORT allocator {
@@ -51,8 +51,8 @@ class LIBIMP_EXPORT allocator {
   class holder_memory_resource;
 
   /**
-   * @brief A memory resource pointer holder class for type erasure.
-   * @tparam MR memory resource type
+   * \brief A memory resource pointer holder class for type erasure.
+   * \tparam MR memory resource type
    */
   template <typename MR>
   class holder_memory_resource<MR, is_memory_resource<MR>> : public holder_base {
@@ -76,8 +76,8 @@ class LIBIMP_EXPORT allocator {
   };
 
   /**
-   * @brief An empty holding class used to calculate a reasonable memory size for the holder.
-   * @tparam MR cannot be converted to the type of memory resource
+   * \brief An empty holding class used to calculate a reasonable memory size for the holder.
+   * \tparam MR cannot be converted to the type of memory resource
    */
   template <typename MR, typename U>
   class holder_memory_resource : public holder_null {
@@ -100,8 +100,8 @@ class LIBIMP_EXPORT allocator {
   allocator(allocator &&other) noexcept;
   allocator &operator=(allocator &&other) & noexcept;
 
-  /// @brief Constructs a allocator from a memory resource pointer
-  /// @remark The lifetime of the pointer must be longer than that of allocator.
+  /// \brief Constructs a allocator from a memory resource pointer
+  /// The lifetime of the pointer must be longer than that of allocator.
   template <typename T, typename = is_memory_resource<T>>
   allocator(T *p_mr) : allocator() {
     if (p_mr == nullptr) return;
@@ -112,7 +112,7 @@ class LIBIMP_EXPORT allocator {
   bool valid() const noexcept;
   explicit operator bool() const noexcept;
 
-  /// @brief Allocate/deallocate memory.
+  /// \brief Allocate/deallocate memory.
   void *alloc(std::size_t s);
   void  free (void *p, std::size_t s);
 };
diff --git a/include/libpmr/def.h b/include/libpmr/def.h
index 2b3ef7e3..ff4c753a 100644
--- a/include/libpmr/def.h
+++ b/include/libpmr/def.h
@@ -1,8 +1,8 @@
 /**
- * @file libpmr/def.h
- * @author mutouyun (orz@orzz.org)
- * @brief Define the trivial configuration information for memory resources.
- * @date 2022-11-13
+ * \file libpmr/def.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the trivial configuration information for memory resources.
+ * \date 2022-11-13
  */
 #pragma once
 
@@ -12,6 +12,6 @@
 
 LIBPMR_NAMESPACE_BEG_
 
-/// @brief Constants.
+/// \brief Constants.
 
 LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/memory_resource.h b/include/libpmr/memory_resource.h
index 7baf5fe2..004e821e 100644
--- a/include/libpmr/memory_resource.h
+++ b/include/libpmr/memory_resource.h
@@ -1,8 +1,8 @@
 /**
- * @file libpmr/memory_resource.h
- * @author mutouyun (orz@orzz.org)
- * @brief Implement memory allocation strategies that can be used by pmr::allocator.
- * @date 2022-11-13
+ * \file libpmr/memory_resource.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Implement memory allocation strategies that can be used by pmr::allocator.
+ * \date 2022-11-13
  */
 #pragma once
 
@@ -14,7 +14,7 @@
 
 LIBPMR_NAMESPACE_BEG_
 
-/// @brief Helper trait for memory resource.
+/// \brief Helper trait for memory resource.
 
 template <typename T, typename = void>
 struct has_allocate : std::false_type {};
@@ -40,23 +40,23 @@ using is_memory_resource =
                           has_deallocate<T>::value>::type;
 
 /**
- * @brief A memory resource that uses the 
+ * \brief A memory resource that uses the 
  * standard memory allocation and deallocation interface to allocate memory.
  * 
- * @see https://en.cppreference.com/w/cpp/memory/new_delete_resource
+ * \see https://en.cppreference.com/w/cpp/memory/new_delete_resource
  */
 class LIBIMP_EXPORT new_delete_resource {
 public:
-  /// @brief Returns a pointer to a new_delete_resource.
+  /// \brief Returns a pointer to a new_delete_resource.
   static new_delete_resource *get() noexcept;
 
-  /// @brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
-  /// @remark Returns nullptr if storage of the requested size and alignment cannot be obtained.
-  /// @see https://en.cppreference.com/w/cpp/memory/memory_resource/do_allocate
+  /// \brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
+  /// \remark Returns nullptr if storage of the requested size and alignment cannot be obtained.
+  /// \see https://en.cppreference.com/w/cpp/memory/memory_resource/do_allocate
   void *allocate(std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
 
-  /// @brief Deallocates the storage pointed to by p.
-  /// @see https://en.cppreference.com/w/cpp/memory/memory_resource/deallocate
+  /// \brief Deallocates the storage pointed to by p.
+  /// \see https://en.cppreference.com/w/cpp/memory/memory_resource/deallocate
   void deallocate(void *p, std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
 };
 
diff --git a/src/libimp/codecvt.cpp b/src/libimp/codecvt.cpp
index 91a0cfd4..84d8a887 100644
--- a/src/libimp/codecvt.cpp
+++ b/src/libimp/codecvt.cpp
@@ -15,19 +15,19 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @brief The transform between local-character-set(UTF-8/GBK/...) and UTF-16/32.
+ * \brief The transform between local-character-set(UTF-8/GBK/...) and UTF-16/32.
  * 
  * Modified from UnicodeConverter.
  * Copyright (c) 2010. Jianhui Qin (http://blog.csdn.net/jhqin).
  * 
- * @remarks codecvt_utf8_utf16/std::wstring_convert is deprecated.
- * @see https://codingtidbit.com/2020/02/09/c17-codecvt_utf8-is-deprecated/
+ * \remarks codecvt_utf8_utf16/std::wstring_convert is deprecated.
+ * \see https://codingtidbit.com/2020/02/09/c17-codecvt_utf8-is-deprecated/
  *      https://stackoverflow.com/questions/42946335/deprecated-header-codecvt-replacement
  *      https://en.cppreference.com/w/cpp/locale/codecvt/in
 */
 namespace {
 
-/// @brief X-bit unicode transformation format
+/// \brief X-bit unicode transformation format
 enum class ufmt {
   utf8,
   utf16,
@@ -53,7 +53,7 @@ template <typename T, ufmt Fmt>
 constexpr bool utf_compatible_v = utf_compatible<T, Fmt>::value;
 
 /**
- * @brief UTF-32 --> UTF-8
+ * \brief UTF-32 --> UTF-8
  */
 template <typename T, typename U>
 auto cvt_char(T src, U* des, std::size_t dlen) noexcept
@@ -91,7 +91,7 @@ auto cvt_char(T src, U* des, std::size_t dlen) noexcept
 }
 
 /**
- * @brief UTF-8 --> UTF-32
+ * \brief UTF-8 --> UTF-32
  */
 template <typename T, typename U>
 auto cvt_char(T const *src, std::size_t slen, U &des) noexcept
@@ -138,7 +138,7 @@ auto cvt_char(T const *src, std::size_t slen, U &des) noexcept
 }
 
 /**
- * @brief UTF-32 --> UTF-16
+ * \brief UTF-32 --> UTF-16
  */
 template <typename T, typename U>
 auto cvt_char(T src, U *des, std::size_t dlen) noexcept
@@ -162,7 +162,7 @@ auto cvt_char(T src, U *des, std::size_t dlen) noexcept
 }
 
 /**
- * @brief UTF-16 --> UTF-32
+ * \brief UTF-16 --> UTF-32
 */
 template <typename T, typename U>
 auto cvt_char(T const *src, std::size_t slen, U &des)
@@ -188,7 +188,7 @@ auto cvt_char(T const *src, std::size_t slen, U &des)
 }
 
 /**
- * @brief UTF-16 --> UTF-8
+ * \brief UTF-16 --> UTF-8
 */
 template <typename T, typename U>
 auto cvt_char(T src, U *des, std::size_t dlen) noexcept
@@ -202,7 +202,7 @@ auto cvt_char(T src, U *des, std::size_t dlen) noexcept
 }
 
 /**
- * @brief UTF-8 --> UTF-16
+ * \brief UTF-8 --> UTF-16
 */
 template <typename T, typename U>
 auto cvt_char(T const *src, std::size_t slen, U &des)
@@ -218,7 +218,7 @@ auto cvt_char(T const *src, std::size_t slen, U &des)
 }
 
 /**
- * @brief UTF-32 string --> UTF-8/16 string
+ * \brief UTF-32 string --> UTF-8/16 string
 */
 template <typename T, typename U>
 auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
@@ -247,7 +247,7 @@ auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noex
 }
 
 /**
- * @brief UTF-8/16 string --> UTF-32 string
+ * \brief UTF-8/16 string --> UTF-32 string
 */
 template <typename T, typename U>
 auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
@@ -276,7 +276,7 @@ auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noex
 }
 
 /**
- * @brief UTF-8/16 string --> UTF-16/8 string
+ * \brief UTF-8/16 string --> UTF-16/8 string
 */
 template <typename T, typename U>
 auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index 3eae1ed9..7252591a 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -14,8 +14,8 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @brief Format conversions helpers.
- * @see http://personal.ee.surrey.ac.uk/Personal/R.Bowden/C/printf.html
+ * \brief Format conversions helpers.
+ * \see http://personal.ee.surrey.ac.uk/Personal/R.Bowden/C/printf.html
  *      https://en.cppreference.com/w/cpp/io/c/fprintf
  */
 namespace {
@@ -149,7 +149,7 @@ span<char> fmt_context_sbuf() noexcept {
 
 } // namespace
 
-/// @brief The context of fmt.
+/// \brief The context of fmt.
 
 fmt_context::fmt_context(std::string &j) noexcept
   : joined_(j)
@@ -189,7 +189,7 @@ span<char> fmt_context::buffer(std::size_t sz) noexcept {
       if ((offset_ + sz) < sbuf.size()) {
         return sbuf.subspan(offset_);
       } else {
-        /// @remark switch the cache to std::string
+        /// \remark switch the cache to std::string
         joined_.assign(sbuf.data(), offset_);
         joined_.resize(roundup(offset_ + sz));
       }
@@ -216,7 +216,7 @@ bool fmt_context::append(std::string const &str) noexcept {
   return true;
 }
 
-/// @brief To string conversion.
+/// \brief To string conversion.
 
 bool to_string(fmt_context &ctx, char const *a) noexcept {
   return to_string(ctx, a, {});
diff --git a/src/libimp/platform/gnuc/demangle.h b/src/libimp/platform/gnuc/demangle.h
index f843f7be..15d1c306 100644
--- a/src/libimp/platform/gnuc/demangle.h
+++ b/src/libimp/platform/gnuc/demangle.h
@@ -1,6 +1,6 @@
 /**
- * @file libimp/platform/gnuc/demangle.h
- * @author mutouyun (orz@orzz.org)
+ * \file libimp/platform/gnuc/demangle.h
+ * \author mutouyun (orz@orzz.org)
  */
 #pragma once
 
@@ -15,15 +15,15 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @brief The conventional way to obtain demangled symbol name.
- * @see https://www.boost.org/doc/libs/1_80_0/libs/core/doc/html/core/demangle.html
+ * \brief The conventional way to obtain demangled symbol name.
+ * \see https://www.boost.org/doc/libs/1_80_0/libs/core/doc/html/core/demangle.html
  * 
- * @param name the mangled name
- * @return std::string a human-readable demangled type name
+ * \param name the mangled name
+ * \return std::string a human-readable demangled type name
  */
 std::string demangle(span<char const> name) noexcept {
   LIBIMP_LOG_();
-  /// @see https://gcc.gnu.org/onlinedocs/libstdc++/libstdc++-html-USERS-4.3/a01696.html
+  /// \see https://gcc.gnu.org/onlinedocs/libstdc++/libstdc++-html-USERS-4.3/a01696.html
   std::size_t sz = name.size() + 1;
   char *buffer = static_cast<char *>(std::malloc(sz));
   int status = 0;
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index 2666ba71..c8dc5915 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -1,6 +1,6 @@
 /**
- * @file libimp/platform/posix/system.h
- * @author mutouyun (orz@orzz.org)
+ * \file libimp/platform/posix/system.h
+ * \author mutouyun (orz@orzz.org)
  */
 #pragma once
 
@@ -19,7 +19,7 @@ namespace sys {
 #endif
 
 /**
- * @brief Get the system error number
+ * \brief Get the system error number
  * https://man7.org/linux/man-pages/man3/errno.3.html
  */
 result_code error_no() noexcept {
@@ -29,7 +29,7 @@ result_code error_no() noexcept {
 }
 
 /**
- * @brief Set the system error number
+ * \brief Set the system error number
  * https://man7.org/linux/man-pages/man3/errno.3.html
  */
 void error_no(result_code code) noexcept {
@@ -37,7 +37,7 @@ void error_no(result_code code) noexcept {
 }
 
 /**
- * @brief Gets a text description of the system error
+ * \brief Gets a text description of the system error
  * https://man7.org/linux/man-pages/man3/strerror_l.3.html
  * https://manpages.ubuntu.com/manpages/xenial/en/man3/strerror.3.html
  */
@@ -58,7 +58,7 @@ std::string error_str(result_code code) noexcept {
 }
 
 /**
- * @brief Gets configuration information at run time
+ * \brief Gets configuration information at run time
  * https://man7.org/linux/man-pages/man2/getpagesize.2.html
  * https://man7.org/linux/man-pages/man3/sysconf.3.html
  */
diff --git a/src/libimp/platform/win/codecvt.h b/src/libimp/platform/win/codecvt.h
index 4a8dd85f..42467291 100644
--- a/src/libimp/platform/win/codecvt.h
+++ b/src/libimp/platform/win/codecvt.h
@@ -1,6 +1,6 @@
 /**
- * @file libimp/platform/win/codecvt.h
- * @author mutouyun (orz@orzz.org)
+ * \file libimp/platform/win/codecvt.h
+ * \author mutouyun (orz@orzz.org)
  */
 #pragma once
 
@@ -14,7 +14,7 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
- * @see https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-multibytetowidechar
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-multibytetowidechar
  *      https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-widechartomultibyte
  * 
  *      CP_ACP       : The system default Windows ANSI code page.
@@ -57,7 +57,7 @@ std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char *des, std::size_
 }
 
 /**
- * @brief Used for char8_t (since C++20) to wchar_t conversion.
+ * \brief Used for char8_t (since C++20) to wchar_t conversion.
  * 
  * There is no ut to guarantee correctness (I'm a little lazy here), 
  * so if there are any bugs, please contact me in time.
diff --git a/src/libimp/platform/win/demangle.h b/src/libimp/platform/win/demangle.h
index a8468a62..d2376f28 100644
--- a/src/libimp/platform/win/demangle.h
+++ b/src/libimp/platform/win/demangle.h
@@ -1,6 +1,6 @@
 /**
- * @file libimp/platform/win/demangle.h
- * @author mutouyun (orz@orzz.org)
+ * \file libimp/platform/win/demangle.h
+ * \author mutouyun (orz@orzz.org)
  */
 #pragma once
 
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index 19d58616..4a831ad2 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -1,6 +1,6 @@
 /**
- * @file libimp/platform/win/system.h
- * @author mutouyun (orz@orzz.org)
+ * \file libimp/platform/win/system.h
+ * \author mutouyun (orz@orzz.org)
  */
 #pragma once
 
@@ -21,7 +21,7 @@ LIBIMP_NAMESPACE_BEG_
 namespace sys {
 
 /**
- * @brief Get the system error number
+ * \brief Get the system error number
  * https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-getlasterror
  */
 result_code error_no() noexcept {
@@ -33,7 +33,7 @@ result_code error_no() noexcept {
 }
 
 /**
- * @brief Set the system error number
+ * \brief Set the system error number
  * https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-setlasterror
  */
 void error_no(result_code code) noexcept {
@@ -42,7 +42,7 @@ void error_no(result_code code) noexcept {
 }
 
 /**
- * @brief Gets a text description of the system error
+ * \brief Gets a text description of the system error
  * https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-formatmessage
  */
 std::string error_str(result_code code) noexcept {
@@ -81,7 +81,7 @@ std::string error_str(result_code code) noexcept {
 }
 
 /**
- * @brief Retrieves information about the current system
+ * \brief Retrieves information about the current system
  * https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsysteminfo
  * https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getnativesysteminfo
  */
diff --git a/src/libipc/platform/posix/def.h b/src/libipc/platform/posix/def.h
index d6c53b13..71f48cf2 100644
--- a/src/libipc/platform/posix/def.h
+++ b/src/libipc/platform/posix/def.h
@@ -1,6 +1,6 @@
 /**
- * @file libipc/platform/posix/mmap.h
- * @author mutouyun (orz@orzz.org)
+ * \file libipc/platform/posix/mmap.h
+ * \author mutouyun (orz@orzz.org)
  */
 #pragma once
 
diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
index a06ddda2..cd3b43a1 100644
--- a/src/libipc/platform/posix/shm_impl.h
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -1,6 +1,6 @@
 /**
- * @file libipc/platform/posix/shm_impl.h
- * @author mutouyun (orz@orzz.org)
+ * \file libipc/platform/posix/shm_impl.h
+ * \author mutouyun (orz@orzz.org)
  */
 #pragma once
 
@@ -54,7 +54,7 @@ result<int> shm_open_fd(std::string const &name, mode::type type) noexcept {
     return {};
   }
 
-  /// @brief Open the object for read-write access.
+  /// \brief Open the object for read-write access.
   int flag = O_RDWR;
   switch (type) {
   case mode::open:
@@ -73,7 +73,7 @@ result<int> shm_open_fd(std::string const &name, mode::type type) noexcept {
     return {};
   }
 
-  /// @brief Create/Open POSIX shared memory bject
+  /// \brief Create/Open POSIX shared memory bject
   return ::shm_open(name.c_str(), flag, S_IRUSR | S_IWUSR |
                                         S_IRGRP | S_IWGRP |
                                         S_IROTH | S_IWOTH);
@@ -81,7 +81,7 @@ result<int> shm_open_fd(std::string const &name, mode::type type) noexcept {
 
 result_code ftruncate_fd(int fd, std::size_t size) noexcept {
   LIBIMP_LOG_();
-  /// @see https://man7.org/linux/man-pages/man3/ftruncate.3p.html
+  /// \see https://man7.org/linux/man-pages/man3/ftruncate.3p.html
   if (::ftruncate(fd, size) != posix::succ) {
     auto err = sys::error();
     log.error("failed: ftruncate(", fd, ", ", size, "). error = ", err);
@@ -93,7 +93,7 @@ result_code ftruncate_fd(int fd, std::size_t size) noexcept {
 } // namespace
 
 /**
- * @see https://man7.org/linux/man-pages/man3/shm_open.3.html
+ * \see https://man7.org/linux/man-pages/man3/shm_open.3.html
  *      https://man7.org/linux/man-pages/man3/fstat.3p.html
  *      https://man7.org/linux/man-pages/man2/mmap.2.html
  */
@@ -112,25 +112,25 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
       if (pfd != nullptr) ::close(**pfd);
     }};
 
-  /// @brief Try to get the size of this fd
+  /// \brief Try to get the size of this fd
   struct stat st;
   if (::fstat(*fd, &st) == posix::failed) {
     log.error("failed: fstat(fd = ", *fd, "). error = ", sys::error());
     return {};
   }
 
-  /// @brief Truncate this fd to a specified length
+  /// \brief Truncate this fd to a specified length
   if (size == 0) {
     size = static_cast<std::size_t>(st.st_size);
     if (!ftruncate_fd(*fd, size)) return {};
   } else if (st.st_size > 0) {
-    /// @remark Based on the actual size.
+    /// \remark Based on the actual size.
     size = static_cast<std::size_t>(st.st_size);
   } else { // st.st_size <= 0
     if (!ftruncate_fd(*fd, size)) return {};
   }
 
-  /// @brief Creates a new mapping in the virtual address space of the calling process.
+  /// \brief Creates a new mapping in the virtual address space of the calling process.
   void *mem = ::mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_SHARED, *fd, 0);
   if (mem == MAP_FAILED) {
     log.error("failed: mmap(size = ", size, ", fd = ", *fd, "). error = ", sys::error());
@@ -140,7 +140,7 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
 }
 
 /**
- * @see https://man7.org/linux/man-pages/man2/mmap.2.html
+ * \see https://man7.org/linux/man-pages/man2/mmap.2.html
  */
 result_code shm_close(shm_t h) noexcept {
   LIBIMP_LOG_();
@@ -151,7 +151,7 @@ result_code shm_close(shm_t h) noexcept {
     log.error("failed: munmap(", shm->memp, ", ", shm->f_sz, "). error = ", err);
     return err.code();
   }
-  /// @brief no unlink the file.
+  /// \brief no unlink the file.
   delete shm;
   return {posix::succ};
 }
diff --git a/src/libipc/platform/win/get_sa.h b/src/libipc/platform/win/get_sa.h
index 60a64f89..4fa2229f 100644
--- a/src/libipc/platform/win/get_sa.h
+++ b/src/libipc/platform/win/get_sa.h
@@ -1,6 +1,6 @@
 /**
- * @file libipc/platform/win/get_sa.h
- * @author mutouyun (orz@orzz.org)
+ * \file libipc/platform/win/get_sa.h
+ * \author mutouyun (orz@orzz.org)
  */
 #pragma once
 
@@ -15,8 +15,8 @@ LIBIPC_NAMESPACE_BEG_
 namespace detail {
 
 /**
- * @brief Create a SECURITY_ATTRIBUTES structure singleton
- * @see https://docs.microsoft.com/en-us/previous-versions/windows/desktop/legacy/aa379560(v=vs.85)
+ * \brief Create a SECURITY_ATTRIBUTES structure singleton
+ * \see https://docs.microsoft.com/en-us/previous-versions/windows/desktop/legacy/aa379560(v=vs.85)
  */
 inline LPSECURITY_ATTRIBUTES get_sa() {
   static struct initiator {
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index 58623dbd..e77e06c7 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -1,6 +1,6 @@
 /**
- * @file libipc/platform/win/mmap_impl.h
- * @author mutouyun (orz@orzz.org)
+ * \file libipc/platform/win/mmap_impl.h
+ * \author mutouyun (orz@orzz.org)
  */
 #pragma once
 
@@ -30,8 +30,8 @@ struct shm_handle {
 namespace {
 
 /**
- * @brief Closes an open object handle.
- * @see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
+ * \brief Closes an open object handle.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
  */
 result_code mmap_close(HANDLE h) {
   LIBIMP_LOG_();
@@ -48,17 +48,17 @@ result_code mmap_close(HANDLE h) {
 }
 
 /**
- * @brief Creates or opens a file mapping object for a specified file.
+ * \brief Creates or opens a file mapping object for a specified file.
  * 
- * @see https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-openfilemappinga
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-openfilemappinga
  *      https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-createfilemappinga
  * 
- * @param file Specifies the name of the file mapping object
- * @param size Specifies the size required to create a file mapping object.
+ * \param file Specifies the name of the file mapping object
+ * \param size Specifies the size required to create a file mapping object.
  *             This size is ignored when opening an existing file mapping object
- * @param type Combinable open modes, create | open
+ * \param type Combinable open modes, create | open
  * 
- * @return File mapping object HANDLE, NULL on error
+ * \return File mapping object HANDLE, NULL on error
  */
 result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type type) noexcept {
   LIBIMP_LOG_();
@@ -72,7 +72,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     return {};
   }
 
-  /// @brief Opens a named file mapping object.
+  /// \brief Opens a named file mapping object.
   auto try_open = [&]() -> result<HANDLE> {
     HANDLE h = ::OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, t_name.c_str());
     if (h == NULL) {
@@ -83,10 +83,10 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     return h;
   };
 
-  /// @brief Creates or opens a named or unnamed file mapping object for a specified file.
+  /// \brief Creates or opens a named or unnamed file mapping object for a specified file.
   auto try_create = [&]() -> result<HANDLE> {
     HANDLE h = ::CreateFileMapping(INVALID_HANDLE_VALUE, detail::get_sa(), PAGE_READWRITE | SEC_COMMIT,
-                                   /// @remark dwMaximumSizeHigh always 0 here.
+                                   /// \remark dwMaximumSizeHigh always 0 here.
                                    0, static_cast<DWORD>(size), t_name.c_str());
     if (h == NULL) {
       auto err = sys::error();
@@ -99,8 +99,8 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
   if (type == mode::open) {
     return try_open();
   } else if ((type == (mode::create | mode::open)) && (size == 0)) {
-    /// @remark CreateFileMapping may returns ERROR_INVALID_PARAMETER when dwMaximumSizeLow is zero.
-    /// @see CreateFileMapping (Windows CE 5.0)
+    /// \remark CreateFileMapping may returns ERROR_INVALID_PARAMETER when dwMaximumSizeLow is zero.
+    /// \see CreateFileMapping (Windows CE 5.0)
     ///      https://learn.microsoft.com/en-us/previous-versions/windows/embedded/aa517331(v=msdn.10)
     return try_open();
   } else if (!(type & mode::create)) {
@@ -109,7 +109,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
   }
   auto h = try_create();
   if (!h) return h;
-  /// @remark If the object exists before the function call, the function returns a handle to the existing object
+  /// \remark If the object exists before the function call, the function returns a handle to the existing object
   ///         (with its current size, not the specified size), and GetLastError returns ERROR_ALREADY_EXISTS.
   if ((type == mode::create) && (::GetLastError() == ERROR_ALREADY_EXISTS)) {
     log.info("the file being created already exists. file = ", file, ", type = ", type);
@@ -120,8 +120,8 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
 }
 
 /**
- * @brief Maps a view of a file mapping into the address space of a calling process.
- * @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-mapviewoffile
+ * \brief Maps a view of a file mapping into the address space of a calling process.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-mapviewoffile
  */
 result<LPVOID> mmap_memof(HANDLE h) {
   LIBIMP_LOG_();
@@ -139,8 +139,8 @@ result<LPVOID> mmap_memof(HANDLE h) {
 }
 
 /**
- * @brief Retrieves the size about a range of pages in the virtual address space of the calling process.
- * @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-virtualquery
+ * \brief Retrieves the size about a range of pages in the virtual address space of the calling process.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-virtualquery
  */
 result<SIZE_T> mmap_sizeof(LPCVOID mem) {
   LIBIMP_LOG_();
@@ -158,8 +158,8 @@ result<SIZE_T> mmap_sizeof(LPCVOID mem) {
 }
 
 /**
- * @brief Unmaps a mapped view of a file from the calling process's address space.
- * @see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-unmapviewoffile
+ * \brief Unmaps a mapped view of a file from the calling process's address space.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-unmapviewoffile
  */
 result_code mmap_release(HANDLE h, LPCVOID mem) {
   LIBIMP_LOG_();
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index 4442d705..5291fe51 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -1,6 +1,6 @@
 /**
- * @file libipc/platform/win/shm_impl.h
- * @author mutouyun (orz@orzz.org)
+ * \file libipc/platform/win/shm_impl.h
+ * \author mutouyun (orz@orzz.org)
  */
 #pragma once
 
diff --git a/src/libipc/platform/win/to_tchar.h b/src/libipc/platform/win/to_tchar.h
index a93c3b5c..9f0e580d 100644
--- a/src/libipc/platform/win/to_tchar.h
+++ b/src/libipc/platform/win/to_tchar.h
@@ -1,6 +1,6 @@
 /**
- * @file libipc/platform/win/to_tchar.h
- * @author mutouyun (orz@orzz.org)
+ * \file libipc/platform/win/to_tchar.h
+ * \author mutouyun (orz@orzz.org)
  */
 #pragma once
 
diff --git a/src/libipc/shm.cpp b/src/libipc/shm.cpp
index 5cc1843f..40ef31d8 100644
--- a/src/libipc/shm.cpp
+++ b/src/libipc/shm.cpp
@@ -12,7 +12,7 @@
 
 LIBIPC_NAMESPACE_BEG_
 
-/// @brief C style shared memory access interface implementation.
+/// \brief C style shared memory access interface implementation.
 
 void *shm_get(shm_t h) noexcept {
   LIBIMP_LOG_();
@@ -44,7 +44,7 @@ std::string shm_name(shm_t h) noexcept {
   return shm->file;
 }
 
-/// @brief The shared memory object.
+/// \brief The shared memory object.
 
 shared_memory::shared_memory() noexcept
   : shm_(nullptr) {}
diff --git a/src/libipc/spin_lock.cpp b/src/libipc/spin_lock.cpp
index 0861c1a2..d21781a1 100644
--- a/src/libipc/spin_lock.cpp
+++ b/src/libipc/spin_lock.cpp
@@ -10,29 +10,29 @@ LIBIPC_NAMESPACE_BEG_
 #if defined(LIBIMP_CC_MSVC)
 # include <Windows.h>   // YieldProcessor
 /**
- * @brief Not for intel c++ compiler, so ignore http://software.intel.com/en-us/forums/topic/296168
- * @see http://msdn.microsoft.com/en-us/library/windows/desktop/ms687419(v=vs.85).aspx
+ * \brief Not for intel c++ compiler, so ignore http://software.intel.com/en-us/forums/topic/296168
+ * \see http://msdn.microsoft.com/en-us/library/windows/desktop/ms687419(v=vs.85).aspx
 */
 # define LIBIPC_LOCK_PAUSE_() YieldProcessor()
 #elif defined(LIBIMP_CC_GNUC)
 # if defined(LIBIMP_INSTR_X86_64)
 /**
- * @brief Intel(R) 64 and IA-32 Architectures Software Developer's Manual V2
+ * \brief Intel(R) 64 and IA-32 Architectures Software Developer's Manual V2
  *        PAUSE-Spin Loop Hint, 4-57
- * @see http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.html?wapkw=instruction+set+reference
+ * \see http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.html?wapkw=instruction+set+reference
 */
 #   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__("pause")
 # elif defined(LIBIMP_INSTR_I64)
 /**
- * @brief Intel(R) Itanium(R) Architecture Developer's Manual, Vol.3
+ * \brief Intel(R) Itanium(R) Architecture Developer's Manual, Vol.3
  *        hint - Performance Hint, 3:145
- * @see http://www.intel.com/content/www/us/en/processors/itanium/itanium-architecture-vol-3-manual.html
+ * \see http://www.intel.com/content/www/us/en/processors/itanium/itanium-architecture-vol-3-manual.html
 */
 #   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__ ("hint @pause")
 # elif defined(LIBIMP_INSTR_ARM)
 /**
- * @brief ARM Architecture Reference Manuals (YIELD)
- * @see http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html
+ * \brief ARM Architecture Reference Manuals (YIELD)
+ * \see http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html
 */
 #   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__ ("yield")
 # endif
@@ -40,20 +40,20 @@ LIBIPC_NAMESPACE_BEG_
 
 #if !defined(LIBIPC_LOCK_PAUSE_)
 /**
- * @brief Just use a compiler fence, prevent compiler from optimizing loop
+ * \brief Just use a compiler fence, prevent compiler from optimizing loop
 */
 # define LIBIPC_LOCK_PAUSE_() std::atomic_signal_fence(std::memory_order_seq_cst)
 #endif /*!defined(LIBIPC_LOCK_PAUSE_)*/
 
 /**
- * @brief Gives hint to processor that improves performance of spin-wait loops.
+ * \brief Gives hint to processor that improves performance of spin-wait loops.
 */
 void pause() noexcept {
   LIBIPC_LOCK_PAUSE_();
 }
 
 /**
- * @brief Basic spin lock
+ * \brief Basic spin lock
 */
 
 void spin_lock::lock() noexcept {
@@ -66,14 +66,14 @@ void spin_lock::unlock() noexcept {
   lc_.store(0, std::memory_order_release);
 }
 
-/// @brief Constants for shared mode spin lock
+/// \brief Constants for shared mode spin lock
 enum : unsigned {
   w_mask = (std::numeric_limits<std::make_signed_t<unsigned>>::max)(), // b 0111 1111
   w_flag = w_mask + 1,                                                 // b 1000 0000
 };
 
 /**
- * @brief Support for shared mode spin lock
+ * \brief Support for shared mode spin lock
 */
 
 void rw_lock::lock() noexcept {
diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
index 9b3b4cc0..951768c8 100644
--- a/src/libpmr/memory_resource.cpp
+++ b/src/libpmr/memory_resource.cpp
@@ -11,7 +11,7 @@ LIBPMR_NAMESPACE_BEG_
 namespace {
 
 /**
- * @brief Check that bytes is not 0 and that the alignment is a power of two.
+ * \brief Check that bytes is not 0 and that the alignment is a power of two.
  */
 bool verify_args(::LIBIMP::log::grip &log, std::size_t bytes, std::size_t alignment) noexcept {
   if (bytes == 0) {
@@ -27,9 +27,9 @@ bool verify_args(::LIBIMP::log::grip &log, std::size_t bytes, std::size_t alignm
 } // namespace
 
 /**
- * @brief Returns a pointer to a new_delete_resource.
+ * \brief Returns a pointer to a new_delete_resource.
  * 
- * @return new_delete_resource* 
+ * \return new_delete_resource* 
  */
 new_delete_resource *new_delete_resource::get() noexcept {
   static new_delete_resource mem_res;
@@ -37,13 +37,13 @@ new_delete_resource *new_delete_resource::get() noexcept {
 }
 
 /**
- * @brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
- * @remark Alignment shall be a power of two.
+ * \brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
+ * Alignment shall be a power of two.
  * 
- * @see https://en.cppreference.com/w/cpp/memory/memory_resource/do_allocate
+ * \see https://en.cppreference.com/w/cpp/memory/memory_resource/do_allocate
  *      https://www.cppstories.com/2019/08/newnew-align/
  * 
- * @return void * - nullptr if storage of the requested size and alignment cannot be obtained.
+ * \return void * - nullptr if storage of the requested size and alignment cannot be obtained.
  */
 void *new_delete_resource::allocate(std::size_t bytes, std::size_t alignment) noexcept {
   LIBIMP_LOG_();
@@ -51,18 +51,18 @@ void *new_delete_resource::allocate(std::size_t bytes, std::size_t alignment) no
     return nullptr;
   }
 #if defined(LIBIMP_CPP_17)
-  /// @see https://en.cppreference.com/w/cpp/memory/c/aligned_alloc
+  /// \see https://en.cppreference.com/w/cpp/memory/c/aligned_alloc
   return std::aligned_alloc(alignment, bytes);
 #else
   if (alignment <= alignof(std::max_align_t)) {
-    /// @see https://en.cppreference.com/w/cpp/memory/c/malloc
+    /// \see https://en.cppreference.com/w/cpp/memory/c/malloc
     return std::malloc(bytes);
   }
 #if defined(LIBIMP_OS_WIN)
-  /// @see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/aligned-malloc
+  /// \see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/aligned-malloc
   return ::_aligned_malloc(bytes, alignment);
 #else // try posix
-  /// @see https://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_memalign.html
+  /// \see https://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_memalign.html
   void *p = nullptr;
   int ret = ::posix_memalign(&p, alignment, bytes);
   if (ret != 0) {
@@ -77,12 +77,12 @@ void *new_delete_resource::allocate(std::size_t bytes, std::size_t alignment) no
 }
 
 /**
- * @brief Deallocates the storage pointed to by p.
- * @remark The storage it points to must not yet have been deallocated, otherwise the behavior is undefined.
+ * \brief Deallocates the storage pointed to by p.
+ * The storage it points to must not yet have been deallocated, otherwise the behavior is undefined.
  * 
- * @see https://en.cppreference.com/w/cpp/memory/memory_resource/do_deallocate
+ * \see https://en.cppreference.com/w/cpp/memory/memory_resource/do_deallocate
  * 
- * @param p must have been returned by a prior call to new_delete_resource::do_allocate(bytes, alignment).
+ * \param p must have been returned by a prior call to new_delete_resource::do_allocate(bytes, alignment).
  */
 void new_delete_resource::deallocate(void *p, std::size_t bytes, std::size_t alignment) noexcept {
   LIBIMP_LOG_();
@@ -93,7 +93,7 @@ void new_delete_resource::deallocate(void *p, std::size_t bytes, std::size_t ali
     return;
   }
 #if defined(LIBIMP_CPP_17)
-  /// @see https://en.cppreference.com/w/cpp/memory/c/free
+  /// \see https://en.cppreference.com/w/cpp/memory/c/free
   std::free(p);
 #else
   if (alignment <= alignof(std::max_align_t)) {
@@ -101,7 +101,7 @@ void new_delete_resource::deallocate(void *p, std::size_t bytes, std::size_t ali
     return;
   }
 #if defined(LIBIMP_OS_WIN)
-  /// @see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/aligned-free
+  /// \see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/aligned-free
   ::_aligned_free(p);
 #else // try posix
   ::free(p);
diff --git a/test/imp/test_imp_result.cpp b/test/imp/test_imp_result.cpp
index dc96fdc4..c6b61773 100644
--- a/test/imp/test_imp_result.cpp
+++ b/test/imp/test_imp_result.cpp
@@ -1,5 +1,6 @@
 
 #include <sstream>
+#include <cstdint>
 
 #include "gtest/gtest.h"
 
@@ -75,8 +76,10 @@ TEST(result, fmt) {
     EXPECT_EQ(imp::fmt(r0), imp::fmt(imp::result_code()));
     imp::result<int> r1 {false, -123};
     EXPECT_EQ(imp::fmt(r1), imp::fmt("[fail, value = ", -123, "]"));
+
     imp::result<void *> r2 {&r1};
     EXPECT_EQ(imp::fmt(r2), imp::fmt("[succ, value = ", (void *)&r1, "]"));
+
     int aaa {};
     imp::result<int *> r3 {&aaa};
     EXPECT_EQ(imp::fmt(r3), imp::fmt("[succ, value = ", (void *)&aaa, "]"));

From e7262af0db83091dfa4bdcf51d9b5451493fa697 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 24 Dec 2022 21:20:18 +0800
Subject: [PATCH 139/272] upd: [imp] rearrange the relationship between
 `result` and `error_code`

---
 include/libimp/error.h              | 13 +++++++------
 include/libimp/result.h             | 29 ++++++++++++++++------------
 include/libimp/system.h             |  7 ++++---
 src/libimp/error.cpp                | 24 ++++++++++-------------
 src/libimp/platform/posix/system.h  |  4 ++--
 src/libimp/platform/win/system.h    | 12 ++++++------
 src/libimp/result.cpp               | 30 +++++++++--------------------
 src/libimp/system.cpp               |  4 ++--
 src/libipc/platform/win/mmap_impl.h |  8 ++++----
 src/libipc/platform/win/shm_impl.h  |  2 +-
 test/imp/test_imp_error.cpp         |  4 ++--
 test/imp/test_imp_result.cpp        |  4 ++++
 test/imp/test_imp_system.cpp        | 10 +++++-----
 13 files changed, 73 insertions(+), 78 deletions(-)

diff --git a/include/libimp/error.h b/include/libimp/error.h
index 741b36a4..ab0c60ad 100644
--- a/include/libimp/error.h
+++ b/include/libimp/error.h
@@ -7,14 +7,16 @@
 #pragma once
 
 #include <string>
+#include <cstdint>
 
 #include "libimp/def.h"
 #include "libimp/export.h"
-#include "libimp/result.h"
 #include "libimp/fmt_cpo.h"
 
 LIBIMP_NAMESPACE_BEG_
 
+using error_code_t = std::uint64_t;
+
 /**
  * \brief Serves as the base class for specific error category types.
  * \see https://en.cppreference.com/w/cpp/error/error_category
@@ -29,7 +31,7 @@ class LIBIMP_EXPORT error_category {
 
   /// \brief observer
   virtual std::string name() const = 0;
-  virtual std::string message(result_code r) const = 0;
+  virtual std::string message(error_code_t const &r) const = 0;
 
   /// \brief comparison function
   bool operator==(error_category const &rhs) const noexcept;
@@ -46,17 +48,16 @@ LIBIMP_EXPORT error_category const &generic_category() noexcept;
  * \see https://en.cppreference.com/w/cpp/error/error_code
  */
 class LIBIMP_EXPORT error_code {
-  result_code r_code_;
+  error_code_t e_code_;
   error_category const *ec_;
 
 public:
   /// \brief constructors
   error_code() noexcept;
-  error_code(result_code r, error_category const &ec) noexcept;
+  error_code(error_code_t const &r, error_category const &ec) noexcept;
 
   /// \brief observers
-  result_code code() const noexcept;
-  result_type value() const noexcept;
+  error_code_t code() const noexcept;
   error_category const &category() const noexcept;
   std::string message() const;
   explicit operator bool() const noexcept;
diff --git a/include/libimp/result.h b/include/libimp/result.h
index 9c5f813d..f7b37ca7 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -19,25 +19,26 @@
 
 LIBIMP_NAMESPACE_BEG_
 
-using result_type = std::tuple<std::uint64_t, bool>;
+using result_code_t = std::uint64_t;
+using result_type   = std::tuple<result_code_t, bool>;
 
 /**
- * \brief Use the least significant (in Little-Endian) of 
- * a 64-bit unsigned integer to indicate success or failure,
- * so the data significant bit cannot exceed 63 bits.
+ * \class class LIBIMP_EXPORT result_code
+ * \brief Uses std::uint64_t as the default underlying type of error code.
  */
 class LIBIMP_EXPORT result_code {
   result_type status_;
 
 public:
   result_code() noexcept;
-  result_code(result_type value) noexcept;
-  result_code(bool ok, result_type value) noexcept;
+  result_code(result_code_t value) noexcept;
+  result_code(result_type const &value) noexcept;
+  result_code(bool ok, result_code_t value) noexcept;
 
-  result_type value() const noexcept;
+  result_code_t value() const noexcept;
   bool ok() const noexcept;
 
-  result_type operator*() const noexcept {
+  result_code_t operator*() const noexcept {
     return value();
   }
   explicit operator bool() const noexcept {
@@ -68,7 +69,7 @@ struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
     code = {};
   }
   constexpr static void init_code(result_code &code, bool ok, T value) noexcept {
-    code = {ok, static_cast<result_type>(value)};
+    code = {ok, static_cast<result_code_t>(value)};
   }
   constexpr static void init_code(result_code &code, T value) noexcept {
     init_code(code, true, value);
@@ -94,12 +95,12 @@ template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
   /// \brief Custom initialization.
   constexpr static void init_code(result_code &code, T value = default_value()) noexcept {
-    code = {default_value() != value, reinterpret_cast<result_type>(value)};
+    code = {default_value() != value, reinterpret_cast<result_code_t>(value)};
   }
   constexpr static void init_code(result_code &code, std::nullptr_t) noexcept {
     code = {false, {}};
   }
-  constexpr static void init_code(result_code &code, std::nullptr_t, result_type r) noexcept {
+  constexpr static void init_code(result_code &code, std::nullptr_t, result_code_t r) noexcept {
     code = {false, r};
   }
 
@@ -124,6 +125,10 @@ struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
 
 } // namespace detail_result
 
+/**
+ * \class class result
+ * \brief The generic wrapper for the result_code.
+ */
 template <typename T, typename TypeTraits>
 class result : public TypeTraits {
 
@@ -144,7 +149,7 @@ class result : public TypeTraits {
   bool ok() const noexcept { return code_.ok(); }
   T value() const noexcept { return type_traits_t::cast_from_code(code_); }
 
-  result_type code_value() const noexcept { return code_.value(); }
+  result_code_t code_value() const noexcept { return code_.value(); }
 
   T operator*() const noexcept {
     return value();
diff --git a/include/libimp/system.h b/include/libimp/system.h
index f5967bb3..aed8d7cc 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -13,6 +13,7 @@
 #include "libimp/def.h"
 #include "libimp/export.h"
 #include "libimp/error.h"
+#include "libimp/result.h"
 
 LIBIMP_NAMESPACE_BEG_
 namespace sys {
@@ -20,13 +21,13 @@ namespace sys {
 /**
  * \brief Get/Set the system error number
  */
-LIBIMP_EXPORT result_code error_no() noexcept;
-LIBIMP_EXPORT void error_no(result_code) noexcept;
+LIBIMP_EXPORT error_code_t error_no() noexcept;
+LIBIMP_EXPORT void error_no(error_code_t const &) noexcept;
 
 /**
  * \brief Gets a text description of the system error
  */
-LIBIMP_EXPORT std::string error_str(result_code) noexcept;
+LIBIMP_EXPORT std::string error_str(error_code_t const &) noexcept;
 
 /**
  * \brief Identifies the operating system error category.
diff --git a/src/libimp/error.cpp b/src/libimp/error.cpp
index 7c4cafde..12de0f45 100644
--- a/src/libimp/error.cpp
+++ b/src/libimp/error.cpp
@@ -16,8 +16,8 @@ class generic_error_category : public error_category {
   std::string name() const {
     return "generic";
   }
-  std::string message(result_code r) const {
-    return fmt(r.value(), (!r ? ", \"success\"" : ", \"failure\""));
+  std::string message(error_code_t const &r) const {
+    return fmt(r, ((r == 0) ? ", \"success\"" : ", \"failure\""));
   }
 };
 
@@ -29,17 +29,13 @@ error_category const &generic_category() noexcept {
 }
 
 error_code::error_code() noexcept
-  : r_code_{}, ec_{&generic_category()} {}
+  : error_code{0, generic_category()} {}
 
-error_code::error_code(result_code r, error_category const &ec) noexcept
-  : r_code_{r}, ec_{&ec} {}
+error_code::error_code(error_code_t const &r, error_category const &ec) noexcept
+  : e_code_{r}, ec_{&ec} {}
 
-result_code error_code::code() const noexcept {
-  return r_code_;
-}
-
-result_type error_code::value() const noexcept {
-  return r_code_.value();
+error_code_t error_code::code() const noexcept {
+  return e_code_;
 }
 
 error_category const &error_code::category() const noexcept {
@@ -47,15 +43,15 @@ error_category const &error_code::category() const noexcept {
 }
 
 std::string error_code::message() const {
-  return fmt("[", ec_->name(), ": ", ec_->message(r_code_), "]");
+  return fmt("[", ec_->name(), ": ", ec_->message(e_code_), "]");
 }
 
 error_code::operator bool() const noexcept {
-  return !!r_code_;
+  return e_code_ != 0;
 }
 
 bool operator==(error_code const &lhs, error_code const &rhs) noexcept {
-  return (lhs.r_code_ == rhs.r_code_) && (*lhs.ec_ == *rhs.ec_);
+  return (lhs.e_code_ == rhs.e_code_) && (*lhs.ec_ == *rhs.ec_);
 }
 
 bool operator!=(error_code const &lhs, error_code const &rhs) noexcept {
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index c8dc5915..483d119a 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -32,7 +32,7 @@ result_code error_no() noexcept {
  * \brief Set the system error number
  * https://man7.org/linux/man-pages/man3/errno.3.html
  */
-void error_no(result_code code) noexcept {
+void error_no(result_code const &code) noexcept {
   errno = code ? ENOERR : (int)code.value();
 }
 
@@ -41,7 +41,7 @@ void error_no(result_code code) noexcept {
  * https://man7.org/linux/man-pages/man3/strerror_l.3.html
  * https://manpages.ubuntu.com/manpages/xenial/en/man3/strerror.3.html
  */
-std::string error_str(result_code code) noexcept {
+std::string error_str(result_code const &code) noexcept {
   char msg_buf[256] {};
 #if ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE)
   LIBIMP_LOG_();
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index 4a831ad2..9cfe4ab9 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -24,20 +24,20 @@ namespace sys {
  * \brief Get the system error number
  * https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-getlasterror
  */
-result_code error_no() noexcept {
+error_code_t error_no() noexcept {
   auto err = ::GetLastError();
   if (err == ERROR_SUCCESS) {
     return {ERROR_SUCCESS};
   }
-  return {false, std::uint64_t(err)};
+  return error_code_t(err);
 }
 
 /**
  * \brief Set the system error number
  * https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-setlasterror
  */
-void error_no(result_code code) noexcept {
-  DWORD err = code ? ERROR_SUCCESS : (DWORD)code.value();
+void error_no(error_code_t const &code) noexcept {
+  DWORD err = (code == 0) ? ERROR_SUCCESS : (DWORD)code;
   ::SetLastError(err);
 }
 
@@ -45,10 +45,10 @@ void error_no(result_code code) noexcept {
  * \brief Gets a text description of the system error
  * https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-formatmessage
  */
-std::string error_str(result_code code) noexcept {
+std::string error_str(error_code_t const &code) noexcept {
   LIBIMP_LOG_();
   LIBIMP_TRY {
-    DWORD err = (DWORD)code.value();
+    DWORD err = (DWORD)code;
     LPTSTR lpErrText = NULL;
     if (::FormatMessage(
           FORMAT_MESSAGE_ALLOCATE_BUFFER | 
diff --git a/src/libimp/result.cpp b/src/libimp/result.cpp
index 4036fe89..55a9941a 100644
--- a/src/libimp/result.cpp
+++ b/src/libimp/result.cpp
@@ -3,38 +3,26 @@
 #include "libimp/horrible_cast.h"
 
 LIBIMP_NAMESPACE_BEG_
-namespace {
-
-struct result_code_info {
-  std::uint64_t ok  : 1;
-  std::uint64_t code: 63;
-};
-
-std::uint64_t make_status(bool ok, std::uint64_t code) noexcept {
-  return horrible_cast<std::uint64_t>(result_code_info{(ok ? 1ull : 0ull), code});
-}
-
-result_code_info info_cast(std::uint64_t status) noexcept {
-  return horrible_cast<result_code_info>(status);
-}
-
-} // namespace
 
 result_code::result_code() noexcept
   : result_code(false, {}) {}
 
-result_code::result_code(std::uint64_t value) noexcept
+result_code::result_code(result_code_t value) noexcept
   : result_code(true, value) {}
 
+result_code::result_code(result_type const &value) noexcept
+  : result_code(std::get<bool>(value), 
+                std::get<result_code_t>(value)) {}
+
 result_code::result_code(bool ok, std::uint64_t code) noexcept
-  : status_(make_status(ok, code)) {}
+  : status_(code, ok) {}
 
-std::uint64_t result_code::value() const noexcept {
-  return info_cast(status_).code;
+result_code_t result_code::value() const noexcept {
+  return std::get<result_code_t>(status_);
 }
 
 bool result_code::ok() const noexcept {
-  return info_cast(status_).ok != 0;
+  return std::get<bool>(status_);
 }
 
 bool operator==(result_code const &lhs, result_code const &rhs) noexcept {
diff --git a/src/libimp/system.cpp b/src/libimp/system.cpp
index d71167bd..2ec307a5 100644
--- a/src/libimp/system.cpp
+++ b/src/libimp/system.cpp
@@ -15,8 +15,8 @@ class system_error_category : public ::LIBIMP::error_category {
   std::string name() const {
     return "system";
   }
-  std::string message(::LIBIMP::result_code r) const {
-    return ::LIBIMP::fmt(r.value(), ::LIBIMP::sys::error_str(r));
+  std::string message(::LIBIMP::error_code_t const &r) const {
+    return ::LIBIMP::fmt(r, ::LIBIMP::sys::error_str(r));
   }
 };
 
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index e77e06c7..6466b41b 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -78,7 +78,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     if (h == NULL) {
       auto err = sys::error();
       log.error("failed: OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, ", file, "). error = ", err);
-      return {nullptr, err.value()};
+      return {nullptr, err.code()};
     }
     return h;
   };
@@ -91,7 +91,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     if (h == NULL) {
       auto err = sys::error();
       log.error("failed: CreateFileMapping(PAGE_READWRITE | SEC_COMMIT, ", size, ", ", file, "). error = ", err);
-      return {nullptr, err.value()};
+      return {nullptr, err.code()};
     }
     return h;
   };
@@ -133,7 +133,7 @@ result<LPVOID> mmap_memof(HANDLE h) {
   if (mem == NULL) {
     auto err = sys::error();
     log.error("failed: MapViewOfFile(", h, ", FILE_MAP_ALL_ACCESS). error = ", err);
-    return {nullptr, err.value()};
+    return {nullptr, err.code()};
   }
   return mem;
 }
@@ -152,7 +152,7 @@ result<SIZE_T> mmap_sizeof(LPCVOID mem) {
   if (::VirtualQuery(mem, &mem_info, sizeof(mem_info)) == 0) {
     auto err = sys::error();
     log.error("failed: VirtualQuery(", mem, "). error = ", err);
-    return {false, (SIZE_T)err.value()};
+    return {false, (SIZE_T)err.code()};
   }
   return mem_info.RegionSize;
 }
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index 5291fe51..9ff5dea3 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -34,7 +34,7 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   if (!sz) {
     log.error("failed: mmap_sizeof(", *mem, ").");
     mmap_close(*h);
-    return {nullptr, static_cast<result_type>(sz.value())};
+    return {nullptr, static_cast<result_code_t>(sz.value())};
   }
   return new shm_handle{std::move(name), *sz, *mem, *h};
 }
diff --git a/test/imp/test_imp_error.cpp b/test/imp/test_imp_error.cpp
index d985a3b4..95347435 100644
--- a/test/imp/test_imp_error.cpp
+++ b/test/imp/test_imp_error.cpp
@@ -13,8 +13,8 @@ class custom_error_category : public imp::error_category {
   std::string name() const {
     return "custom";
   }
-  std::string message(imp::result_code r) const {
-    return !r ? "success" : "failure";
+  std::string message(imp::error_code_t const &r) const {
+    return (r == 0) ? "success" : "failure";
   }
 };
 
diff --git a/test/imp/test_imp_result.cpp b/test/imp/test_imp_result.cpp
index c6b61773..757038eb 100644
--- a/test/imp/test_imp_result.cpp
+++ b/test/imp/test_imp_result.cpp
@@ -90,4 +90,8 @@ TEST(result, fmt) {
     imp::result<int *> r5;
     EXPECT_EQ(imp::fmt(r5), "[fail, value = null, code = 0]");
   }
+  {
+    imp::result<std::int64_t> r1 {-123};
+    EXPECT_EQ(imp::fmt(r1), imp::fmt("[succ, value = ", -123, "]"));
+  }
 }
\ No newline at end of file
diff --git a/test/imp/test_imp_system.cpp b/test/imp/test_imp_system.cpp
index d543596a..e49f1f95 100644
--- a/test/imp/test_imp_system.cpp
+++ b/test/imp/test_imp_system.cpp
@@ -15,13 +15,13 @@
 #endif
 
 TEST(system, error_no) {
-  imp::sys::error_no({false, 111});
+  imp::sys::error_no(111);
   auto err = imp::sys::error_no();
-  EXPECT_FALSE(err);
-  EXPECT_EQ(err.value(), 111);
+  EXPECT_FALSE(err == 0);
+  EXPECT_EQ(err, 111);
 
   imp::sys::error_no({});
-  EXPECT_TRUE(imp::sys::error_no());
+  EXPECT_TRUE(imp::sys::error_no() == 0);
 
   auto e_msg = imp::sys::error_str(imp::sys::error_no());
   std::cout << e_msg << "\n";
@@ -51,7 +51,7 @@ TEST(system, error_str) {
   {
     std::string s_txt;
     imp::cvt_sstr(u16_err, s_txt);
-    EXPECT_EQ(imp::sys::error_str({false, ERROR_INVALID_HANDLE}), s_txt);
+    EXPECT_EQ(imp::sys::error_str(ERROR_INVALID_HANDLE), s_txt);
   }
 #else
   EXPECT_EQ(imp::sys::error_str({false, 1234}), "Unknown error 1234");

From 7571a6fa4077b9e5e7106b06baa3b30b2b687dcb Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 24 Dec 2022 21:21:51 +0800
Subject: [PATCH 140/272] fix: linux error

---
 src/libimp/platform/posix/system.h | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index 483d119a..6aee8942 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -22,18 +22,18 @@ namespace sys {
  * \brief Get the system error number
  * https://man7.org/linux/man-pages/man3/errno.3.html
  */
-result_code error_no() noexcept {
+error_code_t error_no() noexcept {
   auto err = errno;
   if (err == ENOERR) return {ENOERR};
-  return {false, std::uint64_t(err)};
+  return error_code_t(err);
 }
 
 /**
  * \brief Set the system error number
  * https://man7.org/linux/man-pages/man3/errno.3.html
  */
-void error_no(result_code const &code) noexcept {
-  errno = code ? ENOERR : (int)code.value();
+void error_no(error_code_t const &code) noexcept {
+  errno = (code == 0) ? ENOERR : (int)code.value();
 }
 
 /**
@@ -41,19 +41,19 @@ void error_no(result_code const &code) noexcept {
  * https://man7.org/linux/man-pages/man3/strerror_l.3.html
  * https://manpages.ubuntu.com/manpages/xenial/en/man3/strerror.3.html
  */
-std::string error_str(result_code const &code) noexcept {
+std::string error_str(error_code_t const &code) noexcept {
   char msg_buf[256] {};
 #if ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE)
   LIBIMP_LOG_();
-  if (::strerror_r((int)code.value(), msg_buf, sizeof(msg_buf)) != 0) {
-    log.error("failed: strerror_r(code = ", (int)code.value(), 
+  if (::strerror_r((int)code, msg_buf, sizeof(msg_buf)) != 0) {
+    log.error("failed: strerror_r(code = ", (int)code, 
                       ", buf, buf-size = ", sizeof(msg_buf), 
                       "). error = ", error_code());
     return {};
   }
   return msg_buf;
 #else
-  return ::strerror_r((int)code.value(), msg_buf, sizeof(msg_buf));
+  return ::strerror_r((int)code, msg_buf, sizeof(msg_buf));
 #endif
 }
 
@@ -76,7 +76,7 @@ result<std::int64_t> conf(info r) noexcept {
   }
   auto err = sys::error();
   log.error("info = ", enum_cast(r), ", error = ", err);
-  return {false, (int)err.value()};
+  return {false, (int)err};
 }
 
 } // namespace sys

From 19edc54f6ef291ed15eabbfe7f69aef805157123 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 24 Dec 2022 21:24:01 +0800
Subject: [PATCH 141/272] fix: linux error

---
 src/libimp/platform/posix/system.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index 6aee8942..0c9ec9cc 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -33,7 +33,7 @@ error_code_t error_no() noexcept {
  * https://man7.org/linux/man-pages/man3/errno.3.html
  */
 void error_no(error_code_t const &code) noexcept {
-  errno = (code == 0) ? ENOERR : (int)code.value();
+  errno = (code == 0) ? ENOERR : (int)code;
 }
 
 /**
@@ -76,7 +76,7 @@ result<std::int64_t> conf(info r) noexcept {
   }
   auto err = sys::error();
   log.error("info = ", enum_cast(r), ", error = ", err);
-  return {false, (int)err};
+  return {false, (int)err.code()};
 }
 
 } // namespace sys

From 7d8ff13db7e4a50cf7ef5d309fe9e5782e54e6ce Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 24 Dec 2022 21:25:53 +0800
Subject: [PATCH 142/272] fix: linux ut

---
 test/imp/test_imp_system.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/imp/test_imp_system.cpp b/test/imp/test_imp_system.cpp
index e49f1f95..1649a6d9 100644
--- a/test/imp/test_imp_system.cpp
+++ b/test/imp/test_imp_system.cpp
@@ -54,9 +54,9 @@ TEST(system, error_str) {
     EXPECT_EQ(imp::sys::error_str(ERROR_INVALID_HANDLE), s_txt);
   }
 #else
-  EXPECT_EQ(imp::sys::error_str({false, 1234}), "Unknown error 1234");
+  EXPECT_EQ(imp::sys::error_str(1234), "Unknown error 1234");
   EXPECT_EQ(imp::sys::error_str({}), "Success");
-  EXPECT_EQ(imp::sys::error_str({false, EINVAL}), "Invalid argument");
+  EXPECT_EQ(imp::sys::error_str(EINVAL), "Invalid argument");
 #endif
 }
 

From 649a5ee02a311988fdf8404f163eb1575ad814d5 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 25 Dec 2022 13:25:29 +0800
Subject: [PATCH 143/272] upd: [imp] optimize result interface and fix some
 bugs

---
 include/libimp/error.h               |   1 +
 include/libimp/fmt_cpo.h             |   4 +
 include/libimp/result.h              | 138 ++++++++++++---------------
 src/libimp/error.cpp                 |  11 ++-
 src/libimp/fmt.cpp                   |  18 +---
 src/libimp/result.cpp                |  36 -------
 src/libipc/platform/posix/shm_impl.h |  46 +++++----
 src/libipc/platform/win/mmap_impl.h  |  12 +--
 src/libipc/platform/win/shm_impl.h   |   6 +-
 test/imp/test_imp_result.cpp         |  62 ++++++------
 10 files changed, 149 insertions(+), 185 deletions(-)
 delete mode 100644 src/libimp/result.cpp

diff --git a/include/libimp/error.h b/include/libimp/error.h
index ab0c60ad..af35bde9 100644
--- a/include/libimp/error.h
+++ b/include/libimp/error.h
@@ -54,6 +54,7 @@ class LIBIMP_EXPORT error_code {
 public:
   /// \brief constructors
   error_code() noexcept;
+  error_code(error_code_t const &r) noexcept;
   error_code(error_code_t const &r, error_category const &ec) noexcept;
 
   /// \brief observers
diff --git a/include/libimp/fmt_cpo.h b/include/libimp/fmt_cpo.h
index ef17a1ff..c3951b8c 100644
--- a/include/libimp/fmt_cpo.h
+++ b/include/libimp/fmt_cpo.h
@@ -8,6 +8,7 @@
 
 #include <string>
 #include <cstddef>
+#include <array>
 
 #include "libimp/def.h"
 #include "libimp/generic.h"
@@ -18,9 +19,12 @@
 LIBIMP_NAMESPACE_BEG_
 
 /**
+ * \class class LIBIMP_EXPORT fmt_context
  * \brief The context of fmt.
  */
 class LIBIMP_EXPORT fmt_context {
+  std::array<char, 2048U> sbuf_; ///< stack buffer
+
   std::string &joined_;
   std::size_t  offset_;
 
diff --git a/include/libimp/result.h b/include/libimp/result.h
index f7b37ca7..7ac6fa7b 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -16,39 +16,9 @@
 #include "libimp/export.h"
 #include "libimp/fmt.h"
 #include "libimp/generic.h"
+#include "libimp/error.h"
 
 LIBIMP_NAMESPACE_BEG_
-
-using result_code_t = std::uint64_t;
-using result_type   = std::tuple<result_code_t, bool>;
-
-/**
- * \class class LIBIMP_EXPORT result_code
- * \brief Uses std::uint64_t as the default underlying type of error code.
- */
-class LIBIMP_EXPORT result_code {
-  result_type status_;
-
-public:
-  result_code() noexcept;
-  result_code(result_code_t value) noexcept;
-  result_code(result_type const &value) noexcept;
-  result_code(bool ok, result_code_t value) noexcept;
-
-  result_code_t value() const noexcept;
-  bool ok() const noexcept;
-
-  result_code_t operator*() const noexcept {
-    return value();
-  }
-  explicit operator bool() const noexcept {
-    return ok();
-  }
-
-  friend bool operator==(result_code const &lhs, result_code const &rhs) noexcept;
-  friend bool operator!=(result_code const &lhs, result_code const &rhs) noexcept;
-};
-
 namespace detail_result {
 
 template <typename T, typename = void>
@@ -60,31 +30,56 @@ template <typename T,
           typename TypeTraits = detail_result::default_traits<T>>
 class result;
 
+/// \typedef Uses std::uint64_t as the default underlying type of result code.
+using result_code = result<std::uint64_t>;
+
 namespace detail_result {
 
 template <typename T>
-struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
+struct generic_traits {
+  /// \typedef Combine data and valid identifiers with a tuple.
+  using storage_t = std::tuple<T, error_code>;
+
   /// \brief Custom initialization.
-  constexpr static void init_code(result_code &code) noexcept {
-    code = {};
+  constexpr static void init_code(storage_t &code) noexcept {
+    code = {0, -1/*make a default error code*/};
   }
-  constexpr static void init_code(result_code &code, bool ok, T value) noexcept {
-    code = {ok, static_cast<result_code_t>(value)};
+  constexpr static void init_code(storage_t &code, T value, error_code const &ec) noexcept {
+    code = {value, ec};
   }
-  constexpr static void init_code(result_code &code, T value) noexcept {
-    init_code(code, true, value);
+  constexpr static void init_code(storage_t &code, T value) noexcept {
+    code = {value, {}};
+  }
+  constexpr static void init_code(storage_t &code, error_code const &ec) noexcept {
+    code = {{}, ec};
   }
 
+  /// \brief Custom type data acquisition.
+  constexpr static T get_value(storage_t const &code) noexcept {
+    return std::get<0>(code);
+  }
+  constexpr static bool get_ok(storage_t const &code) noexcept {
+    return !std::get<1>(code);
+  }
+  constexpr static error_code get_error(storage_t const &code) noexcept {
+    return std::get<1>(code);
+  }
+};
+
+template <typename T>
+struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> : generic_traits<T> {
+  /// \brief Custom initialization.
+  constexpr static void init_code(storage_t &code, T value, bool ok) noexcept {
+    code = {value, static_cast<error_code_t>(ok ?  0 : 
+                    ((value == default_value()) ? -1 : value))};
+  }
+  using generic_traits<T>::init_code;
+
   /// \brief Custom default value.
   constexpr static T default_value() noexcept {
     return 0;
   }
 
-  /// \brief Custom type conversions.
-  constexpr static T cast_from_code(result_code code) noexcept {
-    return static_cast<T>(code.value());
-  }
-
   /// \brief Custom formatted output.
   static std::string format(result<T> const &r) noexcept {
     return fmt(*r);
@@ -92,34 +87,27 @@ struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> {
 };
 
 template <typename T>
-struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
+struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> : generic_traits<T> {
   /// \brief Custom initialization.
-  constexpr static void init_code(result_code &code, T value = default_value()) noexcept {
-    code = {default_value() != value, reinterpret_cast<result_code_t>(value)};
-  }
-  constexpr static void init_code(result_code &code, std::nullptr_t) noexcept {
-    code = {false, {}};
+  constexpr static void init_code(storage_t &code, std::nullptr_t, error_code const &ec) noexcept {
+    code = {nullptr, ec};
   }
-  constexpr static void init_code(result_code &code, std::nullptr_t, result_code_t r) noexcept {
-    code = {false, r};
+  constexpr static void init_code(storage_t &code, std::nullptr_t) noexcept {
+    code = {nullptr, -1};
   }
+  using generic_traits<T>::init_code;
 
   /// \brief Custom default value.
   constexpr static T default_value() noexcept {
     return nullptr;
   }
 
-  /// \brief Custom type conversions.
-  constexpr static T cast_from_code(result_code code) noexcept {
-    return code.ok() ? reinterpret_cast<T>(code.value()) : default_value();
-  }
-
   /// \brief Custom formatted output.
   static std::string format(result<T> const &r) noexcept {
     if LIBIMP_LIKELY(r) {
       return fmt(static_cast<void *>(*r));
     }
-    return fmt(static_cast<void *>(*r), ", code = ", r.code_value());
+    return fmt(static_cast<void *>(*r), ", error = ", r.error());
   }
 };
 
@@ -127,51 +115,43 @@ struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> {
 
 /**
  * \class class result
- * \brief The generic wrapper for the result_code.
+ * \brief The generic wrapper for the result type.
  */
 template <typename T, typename TypeTraits>
 class result : public TypeTraits {
-
-  /// \brief Internal data is stored using result_code.
-  result_code code_;
-
 public:
   using type_traits_t = TypeTraits;
+  using storage_t     = typename type_traits_t::storage_t;
+
+private:
+  storage_t code_; ///< internal data
 
+public:
   template <typename... A, 
             typename = is_not_match<result, A...>,
-            typename = decltype(type_traits_t::init_code(std::declval<result_code &>()
+            typename = decltype(type_traits_t::init_code(std::declval<storage_t &>()
                                                        , std::declval<A>()...))>
   result(A &&... args) noexcept {
     type_traits_t::init_code(code_, std::forward<A>(args)...);
   }
 
-  bool ok() const noexcept { return code_.ok(); }
-  T value() const noexcept { return type_traits_t::cast_from_code(code_); }
+  T          value() const noexcept { return type_traits_t::get_value(code_); }
+  bool       ok   () const noexcept { return type_traits_t::get_ok   (code_); }
+  error_code error() const noexcept { return type_traits_t::get_error(code_); }
 
-  result_code_t code_value() const noexcept { return code_.value(); }
-
-  T operator*() const noexcept {
-    return value();
-  }
-  explicit operator bool() const noexcept {
-    return ok();
-  }
+         T operator *   () const noexcept { return value(); }
+  explicit operator bool() const noexcept { return ok   (); }
 
   friend bool operator==(result const &lhs, result const &rhs) noexcept { return lhs.code_ == rhs.code_; }
-  friend bool operator!=(result const &lhs, result const &rhs) noexcept { return lhs.code_ != rhs.code_; }
+  friend bool operator!=(result const &lhs, result const &rhs) noexcept { return !(lhs == rhs); }
 };
 
 /// \brief Custom defined fmt_to method for imp::fmt
 namespace detail {
 
-inline bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, result_code r) {
-  return fmt_to(ctx, "[", (r ? "succ" : "fail"), ", value = ", *r, "]");
-}
-
 template <typename T, typename D>
 bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, result<T, D> r) {
-  return fmt_to(ctx, "[", (r ? "succ" : "fail"), ", value = ", result<T, D>::type_traits_t::format(r), "]");
+  return fmt_to(ctx, (r ? "succ" : "fail"), ", value = ", result<T, D>::type_traits_t::format(r));
 }
 
 } // namespace detail
diff --git a/src/libimp/error.cpp b/src/libimp/error.cpp
index 12de0f45..fccaeba7 100644
--- a/src/libimp/error.cpp
+++ b/src/libimp/error.cpp
@@ -17,7 +17,13 @@ class generic_error_category : public error_category {
     return "generic";
   }
   std::string message(error_code_t const &r) const {
-    return fmt(r, ((r == 0) ? ", \"success\"" : ", \"failure\""));
+    if (r == error_code_t(-1)) {
+      return "0, \"failure\"";
+    }
+    if (r == error_code_t(0)) {
+      return "0, \"success\"";
+    }
+    return fmt(r, ", \"failure\"");
   }
 };
 
@@ -31,6 +37,9 @@ error_category const &generic_category() noexcept {
 error_code::error_code() noexcept
   : error_code{0, generic_category()} {}
 
+error_code::error_code(error_code_t const &r) noexcept
+  : error_code{r, generic_category()} {}
+
 error_code::error_code(error_code_t const &r, error_category const &ec) noexcept
   : e_code_{r}, ec_{&ec} {}
 
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index 7252591a..8ba3ff96 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -24,10 +24,6 @@ struct sfmt_policy {
   constexpr static std::size_t aligned_size = 32U;
 };
 
-struct sbuf_policy {
-  constexpr static std::size_t aligned_size = 2048U;
-};
-
 template <typename Policy = sfmt_policy>
 span<char> local_fmt_sbuf() noexcept {
   thread_local std::array<char, Policy::aligned_size> sbuf;
@@ -143,10 +139,6 @@ bool sprintf(fmt_context &ctx, F fop, span<char const> const &fstr, span<char co
   }
 }
 
-span<char> fmt_context_sbuf() noexcept {
-  return local_fmt_sbuf<sbuf_policy>();
-}
-
 } // namespace
 
 /// \brief The context of fmt.
@@ -156,9 +148,7 @@ fmt_context::fmt_context(std::string &j) noexcept
   , offset_(0) {}
 
 std::size_t fmt_context::capacity() noexcept {
-  return (offset_ < fmt_context_sbuf().size())
-                  ? fmt_context_sbuf().size()
-                  : joined_.size();
+  return (offset_ < sbuf_.size()) ? sbuf_.size() : joined_.size();
 }
 
 void fmt_context::reset() noexcept {
@@ -167,8 +157,8 @@ void fmt_context::reset() noexcept {
 
 bool fmt_context::finish() noexcept {
   LIBIMP_TRY {
-    if (offset_ < fmt_context_sbuf().size()) {
-      joined_.assign(fmt_context_sbuf().data(), offset_);
+    if (offset_ < sbuf_.size()) {
+      joined_.assign(sbuf_.data(), offset_);
     } else {
       joined_.resize(offset_);
     }
@@ -183,7 +173,7 @@ span<char> fmt_context::buffer(std::size_t sz) noexcept {
     constexpr std::size_t fmt_context_aligned_size = 512U;
     return (sz & ~(fmt_context_aligned_size - 1)) + fmt_context_aligned_size;
   };
-  auto sbuf = fmt_context_sbuf();
+  auto sbuf = make_span(sbuf_);
   LIBIMP_TRY {
     if (offset_ < sbuf.size()) {
       if ((offset_ + sz) < sbuf.size()) {
diff --git a/src/libimp/result.cpp b/src/libimp/result.cpp
deleted file mode 100644
index 55a9941a..00000000
--- a/src/libimp/result.cpp
+++ /dev/null
@@ -1,36 +0,0 @@
-
-#include "libimp/result.h"
-#include "libimp/horrible_cast.h"
-
-LIBIMP_NAMESPACE_BEG_
-
-result_code::result_code() noexcept
-  : result_code(false, {}) {}
-
-result_code::result_code(result_code_t value) noexcept
-  : result_code(true, value) {}
-
-result_code::result_code(result_type const &value) noexcept
-  : result_code(std::get<bool>(value), 
-                std::get<result_code_t>(value)) {}
-
-result_code::result_code(bool ok, std::uint64_t code) noexcept
-  : status_(code, ok) {}
-
-result_code_t result_code::value() const noexcept {
-  return std::get<result_code_t>(status_);
-}
-
-bool result_code::ok() const noexcept {
-  return std::get<bool>(status_);
-}
-
-bool operator==(result_code const &lhs, result_code const &rhs) noexcept {
-  return lhs.status_ == rhs.status_;
-}
-
-bool operator!=(result_code const &lhs, result_code const &rhs) noexcept {
-  return lhs.status_ != rhs.status_;
-}
-
-LIBIMP_NAMESPACE_END_
diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
index cd3b43a1..2d65c47d 100644
--- a/src/libipc/platform/posix/shm_impl.h
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -74,9 +74,17 @@ result<int> shm_open_fd(std::string const &name, mode::type type) noexcept {
   }
 
   /// \brief Create/Open POSIX shared memory bject
-  return ::shm_open(name.c_str(), flag, S_IRUSR | S_IWUSR |
-                                        S_IRGRP | S_IWGRP |
-                                        S_IROTH | S_IWOTH);
+  int fd = ::shm_open(name.c_str(), flag, S_IRUSR | S_IWUSR |
+                                          S_IRGRP | S_IWGRP |
+                                          S_IROTH | S_IWOTH);
+  if (fd == posix::failed) {
+    auto err = sys::error();
+    log.error("failed: shm_open(name = ", name, 
+                             ", type = ", type, 
+                           "). error = ", err);
+    return err;
+  }
+  return fd;
 }
 
 result_code ftruncate_fd(int fd, std::size_t size) noexcept {
@@ -85,9 +93,9 @@ result_code ftruncate_fd(int fd, std::size_t size) noexcept {
   if (::ftruncate(fd, size) != posix::succ) {
     auto err = sys::error();
     log.error("failed: ftruncate(", fd, ", ", size, "). error = ", err);
-    return err.code();
+    return err;
   }
-  return {posix::succ};
+  return posix::succ;
 }
 
 } // namespace
@@ -100,12 +108,8 @@ result_code ftruncate_fd(int fd, std::size_t size) noexcept {
 result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
   LIBIMP_LOG_();
   auto fd = shm_open_fd(name, type);
-  if (!fd) return {};
-  if (*fd == posix::failed) {
-    log.error("failed: shm_open(name = ", name, 
-                             ", type = ", type, 
-                           "). error = ", sys::error());
-    return {};
+  if (!fd) {
+    return fd.error();
   }
   LIBIMP_UNUSED auto guard = std::unique_ptr<decltype(fd), void (*)(decltype(fd) *)> {
     &fd, [](decltype(fd) *pfd) {
@@ -115,26 +119,30 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   /// \brief Try to get the size of this fd
   struct stat st;
   if (::fstat(*fd, &st) == posix::failed) {
-    log.error("failed: fstat(fd = ", *fd, "). error = ", sys::error());
-    return {};
+    auto err = sys::error();
+    log.error("failed: fstat(fd = ", *fd, "). error = ", err);
+    return err;
   }
 
   /// \brief Truncate this fd to a specified length
   if (size == 0) {
     size = static_cast<std::size_t>(st.st_size);
-    if (!ftruncate_fd(*fd, size)) return {};
+    auto ret = ftruncate_fd(*fd, size);
+    if (!ret) return ret.error();
   } else if (st.st_size > 0) {
     /// \remark Based on the actual size.
     size = static_cast<std::size_t>(st.st_size);
   } else { // st.st_size <= 0
-    if (!ftruncate_fd(*fd, size)) return {};
+    auto ret = ftruncate_fd(*fd, size);
+    if (!ret) return ret.error();
   }
 
   /// \brief Creates a new mapping in the virtual address space of the calling process.
   void *mem = ::mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_SHARED, *fd, 0);
   if (mem == MAP_FAILED) {
-    log.error("failed: mmap(size = ", size, ", fd = ", *fd, "). error = ", sys::error());
-    return {};
+    auto err = sys::error();
+    log.error("failed: mmap(size = ", size, ", fd = ", *fd, "). error = ", err);
+    return err;
   }
   return new shm_handle{std::move(name), size, mem};
 }
@@ -149,11 +157,11 @@ result_code shm_close(shm_t h) noexcept {
   if (::munmap(shm->memp, shm->f_sz) == posix::failed) {
     auto err = sys::error();
     log.error("failed: munmap(", shm->memp, ", ", shm->f_sz, "). error = ", err);
-    return err.code();
+    return err;
   }
   /// \brief no unlink the file.
   delete shm;
-  return {posix::succ};
+  return posix::succ;
 }
 
 LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index 6466b41b..e1db4424 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -42,9 +42,9 @@ result_code mmap_close(HANDLE h) {
   if (!::CloseHandle(h)) {
     auto err = sys::error();
     log.error("failed: CloseHandle(", h, "). error = ", err);
-    return err.code();
+    return err;
   }
-  return {ERROR_SUCCESS};
+  return ERROR_SUCCESS;
 }
 
 /**
@@ -78,7 +78,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     if (h == NULL) {
       auto err = sys::error();
       log.error("failed: OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, ", file, "). error = ", err);
-      return {nullptr, err.code()};
+      return {nullptr, err};
     }
     return h;
   };
@@ -91,7 +91,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     if (h == NULL) {
       auto err = sys::error();
       log.error("failed: CreateFileMapping(PAGE_READWRITE | SEC_COMMIT, ", size, ", ", file, "). error = ", err);
-      return {nullptr, err.code()};
+      return {nullptr, err};
     }
     return h;
   };
@@ -133,7 +133,7 @@ result<LPVOID> mmap_memof(HANDLE h) {
   if (mem == NULL) {
     auto err = sys::error();
     log.error("failed: MapViewOfFile(", h, ", FILE_MAP_ALL_ACCESS). error = ", err);
-    return {nullptr, err.code()};
+    return {nullptr, err};
   }
   return mem;
 }
@@ -152,7 +152,7 @@ result<SIZE_T> mmap_sizeof(LPCVOID mem) {
   if (::VirtualQuery(mem, &mem_info, sizeof(mem_info)) == 0) {
     auto err = sys::error();
     log.error("failed: VirtualQuery(", mem, "). error = ", err);
-    return {false, (SIZE_T)err.code()};
+    return {false, err};
   }
   return mem_info.RegionSize;
 }
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index 9ff5dea3..537b984b 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -22,19 +22,19 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   auto h = mmap_open(name, size, type);
   if (*h == NULL) {
     log.error("failed: mmap_open(name = ", name, ", size = ", size, ", type = ", type, ").");
-    return {nullptr, h.code_value()};
+    return {nullptr, h.error()};
   }
   auto mem = mmap_memof(*h);
   if (*mem == NULL) {
     log.error("failed: mmap_memof(", *h, ").");
     mmap_close(*h);
-    return {nullptr, mem.code_value()};
+    return {nullptr, mem.error()};
   }
   auto sz = mmap_sizeof(*mem);
   if (!sz) {
     log.error("failed: mmap_sizeof(", *mem, ").");
     mmap_close(*h);
-    return {nullptr, static_cast<result_code_t>(sz.value())};
+    return {nullptr, sz.error()};
   }
   return new shm_handle{std::move(name), *sz, *mem, *h};
 }
diff --git a/test/imp/test_imp_result.cpp b/test/imp/test_imp_result.cpp
index 757038eb..5f5bf892 100644
--- a/test/imp/test_imp_result.cpp
+++ b/test/imp/test_imp_result.cpp
@@ -13,50 +13,58 @@ TEST(result, ok) {
   EXPECT_FALSE(ret.ok());
   EXPECT_EQ(ret.value(), 0);
 
-  ret = {true, 0};
+  ret = {0, true};
   EXPECT_TRUE(ret);
   EXPECT_TRUE(ret.ok());
   EXPECT_EQ(ret.value(), 0);
 
-  ret = {false, 1234};
+  ret = {0, false};
   EXPECT_FALSE(ret);
   EXPECT_FALSE(ret.ok());
-  EXPECT_EQ(*ret, 1234);
+  EXPECT_EQ(ret.value(), 0);
 
-  imp::result<int *> r2 {nullptr, 4321};
-  EXPECT_NE(r2, nullptr); // imp::result<int *>{nullptr}
-  EXPECT_EQ(*r2, nullptr);
-  EXPECT_FALSE(r2);
-}
+  ret = {0};
+  EXPECT_TRUE(ret);
+  EXPECT_TRUE(ret.ok());
+  EXPECT_EQ(ret.value(), 0);
 
-TEST(result, code) {
-  imp::result_code ret(true, 1234);
+  ret = {1234, false};
+  EXPECT_FALSE(ret);
+  EXPECT_FALSE(ret.ok());
+  EXPECT_EQ(*ret, 1234);
+
+  ret = imp::result_code(1234, true);
   EXPECT_TRUE(ret);
   EXPECT_TRUE(ret.ok());
   EXPECT_EQ(ret.value(), 1234);
 
-  ret = {false, 0};
+  ret = {0, false};
   EXPECT_FALSE(ret);
   EXPECT_FALSE(ret.ok());
   EXPECT_EQ(ret.value(), 0);
 
-  ret = {true, 4321};
+  ret = {4321, true};
   EXPECT_TRUE(ret);
   EXPECT_TRUE(ret.ok());
   EXPECT_EQ(ret.value(), 4321);
+
+  imp::result<int *> r2 {nullptr, 4321};
+  EXPECT_NE(r2, nullptr); // imp::result<int *>{nullptr}
+  EXPECT_EQ(*r2, nullptr);
+  EXPECT_FALSE(r2);
 }
 
 TEST(result, compare) {
   imp::result_code r1, r2;
   EXPECT_EQ(r1, r2);
 
-  imp::result_code r3(true);
+  imp::result_code r3(0, true);
   EXPECT_NE(r1, r3);
 
-  imp::result_code r4(true, 222222);
+  imp::result_code r4(222222, true);
   EXPECT_NE(r3, r4);
 
-  imp::result_code r5(false, 222222);
+  imp::result_code r5(222222, false);
   EXPECT_NE(r4, r5);
   r3 = r5;
   EXPECT_EQ(r3, r5);
@@ -65,33 +73,33 @@ TEST(result, compare) {
 TEST(result, fmt) {
   {
     imp::result_code r1;
-    EXPECT_EQ(imp::fmt(r1), "[fail, value = 0]");
-    imp::result_code r2(true, 65537);
-    EXPECT_EQ(imp::fmt(r2), "[succ, value = 65537]");
+    EXPECT_EQ(imp::fmt(r1), "fail, value = 0");
+    imp::result_code r2(65537, true);
+    EXPECT_EQ(imp::fmt(r2), "succ, value = 65537");
     imp::result_code r3(0);
-    EXPECT_EQ(imp::fmt(r3), "[succ, value = 0]");
+    EXPECT_EQ(imp::fmt(r3), "succ, value = 0");
   }
   {
     imp::result<int> r0;
     EXPECT_EQ(imp::fmt(r0), imp::fmt(imp::result_code()));
-    imp::result<int> r1 {false, -123};
-    EXPECT_EQ(imp::fmt(r1), imp::fmt("[fail, value = ", -123, "]"));
+    imp::result<int> r1 {-123, false};
+    EXPECT_EQ(imp::fmt(r1), imp::fmt("fail, value = ", -123));
 
     imp::result<void *> r2 {&r1};
-    EXPECT_EQ(imp::fmt(r2), imp::fmt("[succ, value = ", (void *)&r1, "]"));
+    EXPECT_EQ(imp::fmt(r2), imp::fmt("succ, value = ", (void *)&r1));
 
     int aaa {};
     imp::result<int *> r3 {&aaa};
-    EXPECT_EQ(imp::fmt(r3), imp::fmt("[succ, value = ", (void *)&aaa, "]"));
+    EXPECT_EQ(imp::fmt(r3), imp::fmt("succ, value = ", (void *)&aaa));
     imp::result<int *> r4 {nullptr};
-    EXPECT_EQ(imp::fmt(r4), imp::fmt("[fail, value = ", nullptr, ", code = 0]"));
+    EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = [generic: 0, \"failure\"]"));
     r4 = {nullptr, 1234};
-    EXPECT_EQ(imp::fmt(r4), imp::fmt("[fail, value = ", nullptr, ", code = 1234]"));
+    EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = [generic: 1234, \"failure\"]"));
     imp::result<int *> r5;
-    EXPECT_EQ(imp::fmt(r5), "[fail, value = null, code = 0]");
+    EXPECT_EQ(imp::fmt(r5), "fail, value = null, error = [generic: 0, \"failure\"]");
   }
   {
     imp::result<std::int64_t> r1 {-123};
-    EXPECT_EQ(imp::fmt(r1), imp::fmt("[succ, value = ", -123, "]"));
+    EXPECT_EQ(imp::fmt(r1), imp::fmt("succ, value = ", -123));
   }
 }
\ No newline at end of file

From d17aeaae1e8815a9860930d42e8b66e0d999194f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 25 Dec 2022 13:48:06 +0800
Subject: [PATCH 144/272] add: [imp] `result<void>`

---
 include/libimp/error.h       |  1 +
 include/libimp/result.h      | 65 ++++++++++++++++++++++++++++++++++--
 src/libimp/error.cpp         |  2 +-
 test/imp/test_imp_result.cpp | 17 ++++++++++
 4 files changed, 81 insertions(+), 4 deletions(-)

diff --git a/include/libimp/error.h b/include/libimp/error.h
index af35bde9..351ae66e 100644
--- a/include/libimp/error.h
+++ b/include/libimp/error.h
@@ -16,6 +16,7 @@
 LIBIMP_NAMESPACE_BEG_
 
 using error_code_t = std::uint64_t;
+constexpr error_code_t error_number_limit = error_code_t(-1);
 
 /**
  * \brief Serves as the base class for specific error category types.
diff --git a/include/libimp/result.h b/include/libimp/result.h
index 7ac6fa7b..1fcd6142 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -42,7 +42,7 @@ struct generic_traits {
 
   /// \brief Custom initialization.
   constexpr static void init_code(storage_t &code) noexcept {
-    code = {0, -1/*make a default error code*/};
+    code = {0, error_number_limit/*make a default error code*/};
   }
   constexpr static void init_code(storage_t &code, T value, error_code const &ec) noexcept {
     code = {value, ec};
@@ -66,12 +66,39 @@ struct generic_traits {
   }
 };
 
+template <typename ___>
+struct default_traits<void, ___> {
+  /// \typedef Use the `error_code` as the storage type.
+  using storage_t = error_code;
+
+  /// \brief Custom initialization.
+  constexpr static void init_code(storage_t &code) noexcept {
+    code = error_number_limit/*make a default error code*/;
+  }
+  constexpr static void init_code(storage_t &code, error_code const &ec) noexcept {
+    code = ec;
+  }
+
+  /// \brief Custom type data acquisition.
+  constexpr static bool get_ok(storage_t const &code) noexcept {
+    return !code;
+  }
+  constexpr static error_code get_error(storage_t const &code) noexcept {
+    return code;
+  }
+
+  /// \brief Custom formatted output.
+  static std::string format(result<void> const &r) noexcept {
+    return fmt("error = ", r.error());
+  }
+};
+
 template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> : generic_traits<T> {
   /// \brief Custom initialization.
   constexpr static void init_code(storage_t &code, T value, bool ok) noexcept {
-    code = {value, static_cast<error_code_t>(ok ?  0 : 
-                    ((value == default_value()) ? -1 : value))};
+    code = {value, static_cast<error_code_t>(ok ? 0 : 
+                    ((value == default_value()) ? error_number_limit : value))};
   }
   using generic_traits<T>::init_code;
 
@@ -146,6 +173,33 @@ class result : public TypeTraits {
   friend bool operator!=(result const &lhs, result const &rhs) noexcept { return !(lhs == rhs); }
 };
 
+template <typename TypeTraits>
+class result<void, TypeTraits> {
+public:
+  using type_traits_t = TypeTraits;
+  using storage_t     = typename type_traits_t::storage_t;
+
+private:
+  storage_t code_; ///< internal data
+
+public:
+  template <typename... A, 
+            typename = is_not_match<result, A...>,
+            typename = decltype(type_traits_t::init_code(std::declval<storage_t &>()
+                                                       , std::declval<A>()...))>
+  result(A &&... args) noexcept {
+    type_traits_t::init_code(code_, std::forward<A>(args)...);
+  }
+
+  bool       ok   () const noexcept { return type_traits_t::get_ok   (code_); }
+  error_code error() const noexcept { return type_traits_t::get_error(code_); }
+
+  explicit operator bool() const noexcept { return ok   (); }
+
+  friend bool operator==(result const &lhs, result const &rhs) noexcept { return lhs.code_ == rhs.code_; }
+  friend bool operator!=(result const &lhs, result const &rhs) noexcept { return !(lhs == rhs); }
+};
+
 /// \brief Custom defined fmt_to method for imp::fmt
 namespace detail {
 
@@ -154,5 +208,10 @@ bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, result<T, D> r) {
   return fmt_to(ctx, (r ? "succ" : "fail"), ", value = ", result<T, D>::type_traits_t::format(r));
 }
 
+template <typename D>
+bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, result<void, D> r) {
+  return fmt_to(ctx, (r ? "succ" : "fail"), ", ", result<void, D>::type_traits_t::format(r));
+}
+
 } // namespace detail
 LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/error.cpp b/src/libimp/error.cpp
index fccaeba7..a90ef2b8 100644
--- a/src/libimp/error.cpp
+++ b/src/libimp/error.cpp
@@ -17,7 +17,7 @@ class generic_error_category : public error_category {
     return "generic";
   }
   std::string message(error_code_t const &r) const {
-    if (r == error_code_t(-1)) {
+    if (r == error_number_limit) {
       return "0, \"failure\"";
     }
     if (r == error_code_t(0)) {
diff --git a/test/imp/test_imp_result.cpp b/test/imp/test_imp_result.cpp
index 5f5bf892..2c07a0ce 100644
--- a/test/imp/test_imp_result.cpp
+++ b/test/imp/test_imp_result.cpp
@@ -48,6 +48,16 @@ TEST(result, ok) {
   EXPECT_TRUE(ret.ok());
   EXPECT_EQ(ret.value(), 4321);
 
+  imp::result<void> r1;
+  EXPECT_FALSE(r1);
+  r1 = 0;
+  EXPECT_TRUE(r1);
+  r1 = {};
+  EXPECT_FALSE(r1);
+  r1 = 9999;
+  EXPECT_FALSE(r1);
+  EXPECT_EQ(r1.error(), 9999);
+
   imp::result<int *> r2 {nullptr, 4321};
   EXPECT_NE(r2, nullptr); // imp::result<int *>{nullptr}
   EXPECT_EQ(*r2, nullptr);
@@ -102,4 +112,11 @@ TEST(result, fmt) {
     imp::result<std::int64_t> r1 {-123};
     EXPECT_EQ(imp::fmt(r1), imp::fmt("succ, value = ", -123));
   }
+  {
+    imp::result<void> r1;
+    EXPECT_EQ(imp::fmt(r1), "fail, error = [generic: 0, \"failure\"]");
+    r1 = 0;
+    EXPECT_TRUE(r1);
+    EXPECT_EQ(imp::fmt(r1), "succ, error = [generic: 0, \"success\"]");
+  }
 }
\ No newline at end of file

From f8fdfb0f5738156fb0ecb586f298b385aa33c569 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 25 Dec 2022 13:58:31 +0800
Subject: [PATCH 145/272] =?UTF-8?q?fix:=20=E2=80=98storage=5Ft=E2=80=99=20?=
 =?UTF-8?q?has=20not=20been=20declared?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 include/libimp/result.h | 62 ++++++++++++++++++++++-------------------
 1 file changed, 33 insertions(+), 29 deletions(-)

diff --git a/include/libimp/result.h b/include/libimp/result.h
index 1fcd6142..dd95d956 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -88,54 +88,38 @@ struct default_traits<void, ___> {
   }
 
   /// \brief Custom formatted output.
-  static std::string format(result<void> const &r) noexcept {
-    return fmt("error = ", r.error());
-  }
+  static std::string format(result<void> const &r);
 };
 
 template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> : generic_traits<T> {
   /// \brief Custom initialization.
-  constexpr static void init_code(storage_t &code, T value, bool ok) noexcept {
+  constexpr static void init_code(typename generic_traits<T>::storage_t &code, 
+                                  T value, bool ok) noexcept {
     code = {value, static_cast<error_code_t>(ok ? 0 : 
-                    ((value == default_value()) ? error_number_limit : value))};
+                                  ((value == 0) ? error_number_limit : value))};
   }
   using generic_traits<T>::init_code;
 
-  /// \brief Custom default value.
-  constexpr static T default_value() noexcept {
-    return 0;
-  }
-
   /// \brief Custom formatted output.
-  static std::string format(result<T> const &r) noexcept {
-    return fmt(*r);
-  }
+  static std::string format(result<T> const &r) noexcept;
 };
 
 template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> : generic_traits<T> {
   /// \brief Custom initialization.
-  constexpr static void init_code(storage_t &code, std::nullptr_t, error_code const &ec) noexcept {
+  constexpr static void init_code(typename generic_traits<T>::storage_t &code, 
+                                  std::nullptr_t, error_code const &ec) noexcept {
     code = {nullptr, ec};
   }
-  constexpr static void init_code(storage_t &code, std::nullptr_t) noexcept {
+  constexpr static void init_code(typename generic_traits<T>::storage_t &code, 
+                                  std::nullptr_t) noexcept {
     code = {nullptr, -1};
   }
   using generic_traits<T>::init_code;
 
-  /// \brief Custom default value.
-  constexpr static T default_value() noexcept {
-    return nullptr;
-  }
-
   /// \brief Custom formatted output.
-  static std::string format(result<T> const &r) noexcept {
-    if LIBIMP_LIKELY(r) {
-      return fmt(static_cast<void *>(*r));
-    }
-    return fmt(static_cast<void *>(*r), ", error = ", r.error());
-  }
+  static std::string format(result<T> const &r) noexcept;
 };
 
 } // namespace detail_result
@@ -194,14 +178,34 @@ class result<void, TypeTraits> {
   bool       ok   () const noexcept { return type_traits_t::get_ok   (code_); }
   error_code error() const noexcept { return type_traits_t::get_error(code_); }
 
-  explicit operator bool() const noexcept { return ok   (); }
+  explicit operator bool() const noexcept { return ok(); }
 
   friend bool operator==(result const &lhs, result const &rhs) noexcept { return lhs.code_ == rhs.code_; }
   friend bool operator!=(result const &lhs, result const &rhs) noexcept { return !(lhs == rhs); }
 };
 
 /// \brief Custom defined fmt_to method for imp::fmt
-namespace detail {
+namespace detail_result {
+
+template <typename ___>
+std::string default_traits<void, ___>::format(result<void> const &r) {
+  return fmt("error = ", r.error());
+}
+
+template <typename T>
+std::string default_traits<T, std::enable_if_t<std::is_integral<T>::value>>
+          ::format(result<T> const &r) noexcept {
+  return fmt(*r);
+}
+
+template <typename T>
+std::string default_traits<T, std::enable_if_t<std::is_pointer<T>::value>>
+          ::format(result<T> const &r) noexcept {
+  if LIBIMP_LIKELY(r) {
+    return fmt(static_cast<void *>(*r));
+  }
+  return fmt(static_cast<void *>(*r), ", error = ", r.error());
+}
 
 template <typename T, typename D>
 bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, result<T, D> r) {
@@ -213,5 +217,5 @@ bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, result<void, D> r)
   return fmt_to(ctx, (r ? "succ" : "fail"), ", ", result<void, D>::type_traits_t::format(r));
 }
 
-} // namespace detail
+} // namespace detail_result
 LIBIMP_NAMESPACE_END_

From ee04080e29ec72df85196f26c93908c826a14e1a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 25 Dec 2022 14:27:24 +0800
Subject: [PATCH 146/272] add: [imp] `LIBIMP_ASSUME`

---
 include/libimp/detect_plat.h | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
index 12e2e7ef..2a680098 100644
--- a/include/libimp/detect_plat.h
+++ b/include/libimp/detect_plat.h
@@ -44,6 +44,9 @@
 # define LIBIMP_CC_MSVC_2019 1920
 #elif defined(__GNUC__)
 # define LIBIMP_CC_GNUC __GNUC__
+# if defined(__clang__)
+#   define LIBIMP_CC_CLANG
+#endif
 #else
 # error "This compiler is unsupported."
 #endif
@@ -103,6 +106,7 @@
 #endif
 
 /// \brief C++ attributes.
+/// \see https://en.cppreference.com/w/cpp/language/attributes
 
 #if defined(__has_cpp_attribute)
 # if __has_cpp_attribute(fallthrough)
@@ -120,6 +124,9 @@
 # if __has_cpp_attribute(nodiscard)
 #   define LIBIMP_NODISCARD [[nodiscard]]
 # endif
+# if __has_cpp_attribute(assume)
+#   define LIBIMP_ASSUME(...) [[assume(__VA_ARGS__)]]
+# endif
 #endif
 
 #if !defined(LIBIMP_FALLTHROUGH)
@@ -175,6 +182,21 @@
 # endif
 #endif
 
+#if !defined(LIBIMP_ASSUME)
+# if defined(LIBIMP_CC_CLANG) && __has_builtin(__builtin_assume)
+/// \see https://clang.llvm.org/docs/LanguageExtensions.html#langext-builtin-assume
+#   define LIBIMP_ASSUME(...) __builtin_assume(__VA_ARGS__)
+# elif defined(LIBIMP_CC_GNUC) && __has_builtin(__builtin_unreachable)
+/// \see https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html#index-_005f_005fbuiltin_005funreachable
+#   define LIBIMP_ASSUME(...) do { if (!(__VA_ARGS__)) __builtin_unreachable(); } while (false)
+# elif defined(LIBIMP_CC_MSVC)
+/// \see https://learn.microsoft.com/en-us/cpp/intrinsics/assume?view=msvc-140
+#   define LIBIMP_ASSUME(...) __assume(__VA_ARGS__)
+# else
+#   define LIBIMP_ASSUME(...)
+# endif
+#endif
+
 /// \see https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_exceptions.html
 ///      https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros
 ///      https://stackoverflow.com/questions/6487013/programmatically-determine-whether-exceptions-are-enabled

From 013b2011a8041758fc498fe506059395740ed846 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 25 Dec 2022 22:09:01 +0800
Subject: [PATCH 147/272] fix: unexpected tokens following preprocessor
 directive

---
 include/libimp/detect_plat.h | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
index 2a680098..1206d062 100644
--- a/include/libimp/detect_plat.h
+++ b/include/libimp/detect_plat.h
@@ -183,14 +183,20 @@
 #endif
 
 #if !defined(LIBIMP_ASSUME)
-# if defined(LIBIMP_CC_CLANG) && __has_builtin(__builtin_assume)
-/// \see https://clang.llvm.org/docs/LanguageExtensions.html#langext-builtin-assume
-#   define LIBIMP_ASSUME(...) __builtin_assume(__VA_ARGS__)
-# elif defined(LIBIMP_CC_GNUC) && __has_builtin(__builtin_unreachable)
-/// \see https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html#index-_005f_005fbuiltin_005funreachable
-#   define LIBIMP_ASSUME(...) do { if (!(__VA_ARGS__)) __builtin_unreachable(); } while (false)
-# elif defined(LIBIMP_CC_MSVC)
-/// \see https://learn.microsoft.com/en-us/cpp/intrinsics/assume?view=msvc-140
+# if defined(__has_builtin)
+#   if __has_builtin(__builtin_assume)
+      /// \see https://clang.llvm.org/docs/LanguageExtensions.html#langext-builtin-assume
+#     define LIBIMP_ASSUME(...) __builtin_assume(__VA_ARGS__)
+#   elif __has_builtin(__builtin_unreachable)
+      /// \see https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html#index-_005f_005fbuiltin_005funreachable
+#     define LIBIMP_ASSUME(...) do { if (!(__VA_ARGS__)) __builtin_unreachable(); } while (false)
+#   endif
+# endif
+#endif
+
+#if !defined(LIBIMP_ASSUME)
+# if defined(LIBIMP_CC_MSVC)
+    /// \see https://learn.microsoft.com/en-us/cpp/intrinsics/assume?view=msvc-140
 #   define LIBIMP_ASSUME(...) __assume(__VA_ARGS__)
 # else
 #   define LIBIMP_ASSUME(...)

From 983673266ea8161fc4662d7c653fdbcf4c114fbb Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 1 Jan 2023 16:26:55 +0800
Subject: [PATCH 148/272] upd: [imp] optimize log performance

---
 include/libimp/fmt_cpo.h  |   4 +-
 include/libimp/log.h      | 128 +++++++++++++++++++++++---------------
 src/libimp/log.cpp        |  32 ----------
 test/imp/test_imp_log.cpp |  35 ++++++-----
 4 files changed, 96 insertions(+), 103 deletions(-)

diff --git a/include/libimp/fmt_cpo.h b/include/libimp/fmt_cpo.h
index c3951b8c..6352e812 100644
--- a/include/libimp/fmt_cpo.h
+++ b/include/libimp/fmt_cpo.h
@@ -39,9 +39,7 @@ class LIBIMP_EXPORT fmt_context {
   bool append(std::string const &str) noexcept;
 };
 
-/**
- * \brief Supports custom fmt_to methods for imp::fmt.
- */
+/// \brief Supports custom fmt_to methods for imp::fmt.
 namespace detail {
 
 class fmt_to_t {
diff --git a/include/libimp/log.h b/include/libimp/log.h
index 73dc3172..ac423f6e 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -9,13 +9,15 @@
 #include <string>
 #include <type_traits>
 #include <chrono>
-#include <exception>
+#include <tuple>
+#include <utility>
 
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
 #include "libimp/export.h"
 #include "libimp/enum_cast.h"
 #include "libimp/fmt.h"
+#include "libimp/generic.h"
 
 LIBIMP_NAMESPACE_BEG_
 namespace log {
@@ -29,30 +31,69 @@ enum class level : std::int32_t {
   failed,
 };
 
+/// \struct template <typename... T> struct context
+/// \brief Logging context.
+/// \tparam ...T - a log records all parameter types passed
+template <typename... T>
 struct context {
   log::level level;
   std::chrono::system_clock::time_point tp;
   char const *func;
-  std::string text;
+  std::tuple<T...> params;
 };
 
-LIBIMP_EXPORT std::string to_string(context &&) noexcept;
-LIBIMP_EXPORT bool to_string(fmt_context &ctx, context &&) noexcept;
-
 /// \brief Custom defined fmt_to method for imp::fmt
-template <typename T>
-bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, context &&arg) noexcept {
-  return ::LIBIMP::log::to_string(ctx, std::move(arg));
+namespace detail {
+
+template <typename Tp, std::size_t... I, typename... A>
+bool unfold_tuple_fmt_to(fmt_context &ctx, Tp const &tp, std::index_sequence<I...>, A &&...args) {
+  return fmt_to(ctx, std::forward<A>(args)..., std::get<I>(tp)...);
 }
 
-} // namespace log
+} // namespace detail
+
+template <typename... T>
+bool context_to_string(fmt_context &f_ctx, context<T...> const &l_ctx) noexcept {
+  constexpr static char types[] = {
+    'T', 'D', 'I', 'W', 'E', 'F',
+  };
+  LIBIMP_TRY {
+    auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(l_ctx.tp).time_since_epoch().count() % 1000;
+    return detail::unfold_tuple_fmt_to(f_ctx, l_ctx.params, std::index_sequence_for<T...>{},
+                                      "[", types[enum_cast(l_ctx.level)], "]"
+                                      "[", l_ctx.tp, ".", spec("03")(ms), "]"
+                                      "[", l_ctx.func, "] ");
+  } LIBIMP_CATCH(...) {
+    return false;
+  }
+}
+
+template <typename... T>
+std::string context_to_string(context<T...> const &l_ctx) noexcept {
+  LIBIMP_TRY {
+    std::string log_txt;
+    fmt_context f_ctx(log_txt);
+    if (!context_to_string(f_ctx, l_ctx)) {
+      return {};
+    }
+    f_ctx.finish();
+    return log_txt;
+  } LIBIMP_CATCH(...) {
+    return {};
+  }
+}
 
-namespace detail_log {
+namespace detail {
+
+/// \brief Custom defined fmt_to method for imp::fmt
+template <typename... T>
+bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &f_ctx, context<T...> const &l_ctx) noexcept {
+  return ::LIBIMP::log::to_string(f_ctx, l_ctx);
+}
 
 enum out_type : unsigned {
   out_none    = 0x0,
   out_string  = 0x1,
-  out_context = 0x2,
 };
 
 template <typename T>
@@ -62,9 +103,6 @@ class has_fn_output {
   template <typename U, typename = decltype(std::declval<U &>().output(log::level::trace, std::declval<std::string>()))>
   static std::integral_constant<out_type, out_string> check(U *u);
 
-  template <typename U, typename = decltype(std::declval<U &>().output(std::declval<log::context>()))>
-  static std::integral_constant<out_type, out_context> check(U *u);
-
 public:
   using type = decltype(check(static_cast<T *>(nullptr)));
 };
@@ -73,7 +111,7 @@ template <typename T>
 constexpr out_type has_fn_output_v = has_fn_output<T>::type::value;
 
 struct vtable_t {
-  void (*output)(void *, log::context &&);
+  void (*output)(void *, log::level, std::string &&);
 };
 
 template <typename T>
@@ -81,27 +119,17 @@ class traits {
   template <typename U>
   static auto make_fn_output() noexcept
     -> std::enable_if_t<(has_fn_output_v<U> == out_none), decltype(vtable_t{}.output)> {
-    return [](void *, log::context &&) {};
+    return [](void *, log::level, std::string &&) {};
   }
 
   template <typename U>
   static auto make_fn_output() noexcept
     -> std::enable_if_t<(has_fn_output_v<U> == out_string), decltype(vtable_t{}.output)> {
-    return [](void *p, log::context &&ctx) {
-      auto lev = ctx.level;
-      auto str = to_string(std::move(ctx));
+    return [](void *p, log::level lev, std::string &&str) {
       static_cast<U *>(p)->output(lev, std::move(str));
     };
   }
 
-  template <typename U>
-  static auto make_fn_output() noexcept
-    -> std::enable_if_t<(has_fn_output_v<U> == out_context), decltype(vtable_t{}.output)> {
-    return [](void *p, log::context &&ctx) {
-      static_cast<U *>(p)->output(std::move(ctx));
-    };
-  }
-
 public:
   static auto make_vtable() noexcept {
     static vtable_t vt { make_fn_output<T>() };
@@ -109,28 +137,35 @@ class traits {
   }
 };
 
-} // namespace detail_log
-
-namespace log {
+} // namespace detail
 
-class LIBIMP_EXPORT printer {
+class printer {
   void *objp_ {nullptr};
-  detail_log::vtable_t *vtable_ {nullptr};
+  detail::vtable_t *vtable_ {nullptr};
 
 public:
   printer() noexcept = default;
 
   template <typename T, 
-            /// \remark generic constructor may shadow the default copy constructor
-            typename = std::enable_if_t<!std::is_same<printer, T>::value>>
+            typename = is_not_match<printer, T>>
   printer(T &p) noexcept
     : objp_  (static_cast<void *>(&p))
-    , vtable_(detail_log::traits<T>::make_vtable()) {}
+    , vtable_(detail::traits<T>::make_vtable()) {}
 
-  explicit operator bool() const noexcept;
-  void output(context) noexcept;
+  explicit operator bool() const noexcept {
+    return (objp_ != nullptr) && (vtable_ != nullptr);
+  }
+
+  template <typename... T>
+  void output(context<T...> const &ctx) noexcept {
+    if (!*this) return;
+    LIBIMP_TRY {
+      vtable_->output(objp_, ctx.level, context_to_string(ctx));
+    } LIBIMP_CATCH(...) {}
+  }
 };
 
+/// \class class LIBIMP_EXPORT std_t
 /// \brief Standard console output.
 class LIBIMP_EXPORT std_t {
 public:
@@ -153,19 +188,10 @@ class grip {
     if (!printer_ || (enum_cast(l) < enum_cast(level_limit_))) {
       return *this;
     }
-    context ctx;
-    LIBIMP_TRY {
-      ctx = {
-        l, std::chrono::system_clock::now(), func_,
-        fmt(std::forward<A>(args)...),
-      };
-    } LIBIMP_CATCH(std::exception const &e) {
-      /// \remark [TBD] std::string constructor may throw an exception
-      ctx = {
-        level::failed, std::chrono::system_clock::now(), func_, e.what(),
-      };
-    }
-    printer_.output(std::move(ctx));
+    printer_.output(context<A &&...> {
+      l, std::chrono::system_clock::now(), func_,
+      std::forward_as_tuple(std::forward<A>(args)...),
+    });
     return *this;
   }
 
@@ -186,4 +212,4 @@ class grip {
 } // namespace log
 LIBIMP_NAMESPACE_END_
 
-#define LIBIMP_LOG_(...) ::LIBIMP::log::grip log {__func__, __VA_ARGS__}
\ No newline at end of file
+#define LIBIMP_LOG_(...) ::LIBIMP::log::grip log(__func__,##__VA_ARGS__)
\ No newline at end of file
diff --git a/src/libimp/log.cpp b/src/libimp/log.cpp
index 3b68705a..de535bba 100644
--- a/src/libimp/log.cpp
+++ b/src/libimp/log.cpp
@@ -1,42 +1,10 @@
 #include "libimp/log.h"
 
-#include <utility>
 #include <cstdio>
 
 LIBIMP_NAMESPACE_BEG_
 namespace log {
 
-bool to_string(fmt_context &f_ctx, context &&l_ctx) noexcept {
-  constexpr static char types[] = {
-    'T', 'D', 'I', 'W', 'E', 'F',
-  };
-  LIBIMP_TRY {
-    auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(l_ctx.tp).time_since_epoch().count() % 1000;
-    return fmt_to(f_ctx, "[", types[enum_cast(l_ctx.level)], "][", l_ctx.tp, ".", spec("03")(ms), "][", l_ctx.func, "] ", l_ctx.text);
-  } LIBIMP_CATCH(std::exception const &) {
-    return false;
-  }
-}
-
-std::string to_string(context &&ctx) noexcept {
-  std::string log_txt;
-  fmt_context f_ctx(log_txt);
-  if (!to_string(f_ctx, std::move(ctx))) {
-    return {};
-  }
-  f_ctx.finish();
-  return log_txt;
-}
-
-printer::operator bool() const noexcept {
-  return (objp_ != nullptr) && (vtable_ != nullptr);
-}
-
-void printer::output(context ctx) noexcept {
-  if (!*this) return;
-  vtable_->output(objp_, std::move(ctx));
-}
-
 std_t std_out;
 
 void std_t::output(log::level l, std::string &&s) noexcept {
diff --git a/test/imp/test_imp_log.cpp b/test/imp/test_imp_log.cpp
index c4852c02..631d661f 100644
--- a/test/imp/test_imp_log.cpp
+++ b/test/imp/test_imp_log.cpp
@@ -1,23 +1,24 @@
 
 #include <iostream>
+#include <string>
 
 #include "gtest/gtest.h"
 
 #include "libimp/log.h"
 
 TEST(log, detail) {
-  EXPECT_EQ(imp::detail_log::has_fn_output_v<int>, imp::detail_log::out_none);
+  EXPECT_EQ(imp::log::detail::has_fn_output_v<int>, imp::log::detail::out_none);
 
   struct foo {
     int info(std::string);
   };
-  EXPECT_EQ(imp::detail_log::has_fn_output_v<foo>, imp::detail_log::out_none);
+  EXPECT_EQ(imp::log::detail::has_fn_output_v<foo>, imp::log::detail::out_none);
 
   struct bar {
     int info(char const *);
     void output(imp::log::level, std::string &&);
   };
-  EXPECT_EQ(imp::detail_log::has_fn_output_v<bar>, imp::detail_log::out_string);
+  EXPECT_EQ(imp::log::detail::has_fn_output_v<bar>, imp::log::detail::out_string);
 
   struct str {
     str(std::string const &);
@@ -25,11 +26,11 @@ TEST(log, detail) {
   struct foo_bar {
     void output(imp::log::level, str);
   };
-  EXPECT_EQ(imp::detail_log::has_fn_output_v<foo_bar>, imp::detail_log::out_string);
+  EXPECT_EQ(imp::log::detail::has_fn_output_v<foo_bar>, imp::log::detail::out_string);
 
-  auto vt_int = imp::detail_log::traits<int>::make_vtable();
+  auto vt_int = imp::log::detail::traits<int>::make_vtable();
   EXPECT_NE(vt_int, nullptr);
-  EXPECT_NO_THROW(vt_int->output(nullptr, imp::log::context{}));
+  EXPECT_NO_THROW(vt_int->output(nullptr, imp::log::level::error, ""));
 
   struct log {
     std::string what;
@@ -37,13 +38,13 @@ TEST(log, detail) {
       if (l == imp::log::level::error) what += s + '\n';
     }
   } ll;
-  auto vt_log = imp::detail_log::traits<log>::make_vtable();
+  auto vt_log = imp::log::detail::traits<log>::make_vtable();
   EXPECT_NE(vt_log, nullptr);
 
-  vt_log->output(&ll, imp::log::context{imp::log::level::info , std::chrono::system_clock::now(), __func__, "123"});
-  vt_log->output(&ll, imp::log::context{imp::log::level::error, std::chrono::system_clock::now(), __func__, "321"});
-  vt_log->output(&ll, imp::log::context{imp::log::level::info , std::chrono::system_clock::now(), __func__, "654"});
-  vt_log->output(&ll, imp::log::context{imp::log::level::error, std::chrono::system_clock::now(), __func__, "456"});
+  vt_log->output(&ll, imp::log::level::info, "123");
+  vt_log->output(&ll, imp::log::level::info, "321");
+  vt_log->output(&ll, imp::log::level::info, "654");
+  vt_log->output(&ll, imp::log::level::info, "456");
   std::cout << ll.what << "\n";
   SUCCEED();
 }
@@ -60,15 +61,15 @@ TEST(log, log_printer) {
   } ll;
 
   imp::log::printer pt = ll;
-  pt.output({imp::log::level::info , std::chrono::system_clock::now(), __func__, "hello "});
-  pt.output({imp::log::level::error, std::chrono::system_clock::now(), __func__, "failed: "});
-  pt.output({imp::log::level::info , std::chrono::system_clock::now(), __func__, "log-pt"});
-  pt.output({imp::log::level::error, std::chrono::system_clock::now(), __func__, "whatever"});
+  pt.output(imp::log::context<char const *>{imp::log::level::info , std::chrono::system_clock::now(), __func__, "hello "});
+  pt.output(imp::log::context<char const *>{imp::log::level::error, std::chrono::system_clock::now(), __func__, "failed: "});
+  pt.output(imp::log::context<char const *>{imp::log::level::info , std::chrono::system_clock::now(), __func__, "log-pt"});
+  pt.output(imp::log::context<char const *>{imp::log::level::error, std::chrono::system_clock::now(), __func__, "whatever"});
   std::cout << ll.i << "\n";
   std::cout << ll.e << "\n";
 
   imp::log::printer ps = imp::log::std_out;
-  ps.output({imp::log::level::info, std::chrono::system_clock::now(), __func__, "hello world"});
+  ps.output(imp::log::context<char const *>{imp::log::level::info, std::chrono::system_clock::now(), __func__, "hello world"});
   SUCCEED();
 }
 
@@ -82,4 +83,4 @@ TEST(log, gripper) {
     log.info("hello 2");
   }
   SUCCEED();
-}
\ No newline at end of file
+}

From 4624610e45ef4da865be25cc32a6d2edb56bdf2f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 1 Jan 2023 16:38:27 +0800
Subject: [PATCH 149/272] =?UTF-8?q?fix:=20=E2=80=98to=5Fstring=E2=80=99=20?=
 =?UTF-8?q?is=20not=20a=20member=20of=20=E2=80=98imp::log=E2=80=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 include/libimp/log.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index ac423f6e..97958eea 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -85,12 +85,6 @@ std::string context_to_string(context<T...> const &l_ctx) noexcept {
 
 namespace detail {
 
-/// \brief Custom defined fmt_to method for imp::fmt
-template <typename... T>
-bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &f_ctx, context<T...> const &l_ctx) noexcept {
-  return ::LIBIMP::log::to_string(f_ctx, l_ctx);
-}
-
 enum out_type : unsigned {
   out_none    = 0x0,
   out_string  = 0x1,
@@ -137,6 +131,12 @@ class traits {
   }
 };
 
+/// \brief Custom defined fmt_to method for imp::fmt
+template <typename... T>
+bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &f_ctx, context<T...> const &l_ctx) noexcept {
+  return ::LIBIMP::log::context_to_string(f_ctx, l_ctx);
+}
+
 } // namespace detail
 
 class printer {

From 18e8a79242900dbfc8eb62179321ae547a4286e4 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 5 Feb 2023 19:54:48 +0800
Subject: [PATCH 150/272] add: [imp] expected (TBD)

---
 include/libimp/expected.h     | 248 ++++++++++++++++++++++++++++++++++
 include/libimp/generic.h      |  19 ++-
 test/imp/test_imp_utility.cpp |  11 +-
 3 files changed, 275 insertions(+), 3 deletions(-)
 create mode 100644 include/libimp/expected.h

diff --git a/include/libimp/expected.h b/include/libimp/expected.h
new file mode 100644
index 00000000..ad68b687
--- /dev/null
+++ b/include/libimp/expected.h
@@ -0,0 +1,248 @@
+/**
+ * \file libimp/expected.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Provides a way to store either of two values.
+ * \date 2023-02-05
+ */
+#pragma once
+
+#include <type_traits>
+#include <utility>  // std::exchange
+#include <array>
+#include <memory>   // std::addressof
+#include <cstddef>  // std::nullptr_t
+
+#include "libimp/def.h"
+#include "libimp/construct.h"
+#include "libimp/generic.h"
+#include "libimp/byte.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \brief In-place construction tag for unexpected value in expected.
+ * \see https://en.cppreference.com/w/cpp/utility/expected/unexpect_t
+ */
+struct unexpected_t {
+  explicit unexpected_t() = default;
+};
+constexpr unexpected_t unexpected {};
+
+/**
+ * \class template <typename T, typename E> expected
+ * \brief Provides a way to store either of two values.
+ * \see https://en.cppreference.com/w/cpp/utility/expected
+ * \tparam T - the type of the expected value.
+ * \tparam E - the type of the unexpected value.
+ */
+template <typename T, typename E>
+class expected;
+
+namespace detail_expected {
+
+template <typename T, typename E>
+struct data_union {
+  union {
+    T value_;  ///< the expected value
+    E error_;  ///< the unexpected value
+  };
+
+  data_union(data_union const &) = delete;
+  data_union &operator=(data_union const &) = delete;
+
+  data_union(std::nullptr_t) noexcept {}
+  ~data_union() {}
+
+  template <typename... A>
+  data_union(in_place_t, A &&...args) : value_{std::forward<A>(args)...} {}
+  template <typename... A>
+  data_union(unexpected_t, A &&...args) : error_{std::forward<A>(args)...} {}
+
+  void destruct_value() noexcept { destroy(&value_); }
+  void destruct_error() noexcept { destroy(&error_); }
+};
+
+template <typename E>
+struct data_union<void, E> {
+  alignas(E) std::array<byte, sizeof(E)> error_;  ///< the unexpected value
+
+  data_union(data_union const &) = delete;
+  data_union &operator=(data_union const &) = delete;
+
+  data_union(std::nullptr_t) noexcept {}
+
+  template <typename... A>
+  data_union(in_place_t, A &&...) noexcept {}
+  template <typename... A>
+  data_union(unexpected_t, A &&...args) {
+    construct<E>(&error_, std::forward<A>(args)...);
+  }
+
+  void destruct_value() noexcept {}
+  void destruct_error() noexcept { destroy(reinterpret_cast<E *>(&error_)); }
+};
+
+template <typename T, typename E>
+auto destruct(bool /*has_value*/, data_union<T, E> &/*data*/) noexcept
+  -> typename std::enable_if<std::is_trivially_destructible<T>::value &&
+                             std::is_trivially_destructible<E>::value>::type {
+  // Do nothing.
+}
+
+template <typename T, typename E>
+auto destruct(bool has_value, data_union<T, E> &data) noexcept
+  -> typename std::enable_if<!std::is_trivially_destructible<T>::value &&
+                              std::is_trivially_destructible<E>::value>::type {
+  if (has_value) data.destruct_value();
+}
+
+template <typename T, typename E>
+auto destruct(bool has_value, data_union<T, E> &data) noexcept
+  -> typename std::enable_if< std::is_trivially_destructible<T>::value &&
+                             !std::is_trivially_destructible<E>::value>::type {
+  if (!has_value) data.destruct_error();
+}
+
+template <typename T, typename E>
+auto destruct(bool has_value, data_union<T, E> &data) noexcept
+  -> typename std::enable_if<!std::is_trivially_destructible<T>::value &&
+                             !std::is_trivially_destructible<E>::value>::type {
+  if (has_value) {
+    data.destruct_value();
+  } else {
+    data.destruct_error();
+  }
+}
+
+template <typename S, typename T, typename E>
+struct value_getter : data_union<T, E> {
+  using data_union<T, E>::data_union;
+
+  value_getter(S const &other) : data_union<T, E>(nullptr) {
+    if (bool(static_cast<S &>(other))) {
+      construct<data_union<T, E>>(this, in_place, other.value_);
+    } else {
+      construct<data_union<T, E>>(this, unexpected, other.error_);
+    }
+  }
+
+  value_getter(S &&other) : data_union<T, E>(nullptr) {
+    if (bool(static_cast<S &>(other))) {
+      construct<data_union<T, E>>(this, in_place, std::move(other.value_));
+    } else {
+      construct<data_union<T, E>>(this, unexpected, std::move(other.error_));
+    }
+  }
+
+  T const & value() const &  noexcept { return this->value_; }
+  T &       value()       &  noexcept { return this->value_; }
+  T const &&value() const && noexcept { return std::move(this->value_); }
+  T &&      value()       && noexcept { return std::move(this->value_); }
+
+  T const *operator->() const noexcept { return std::addressof(this->value_); }
+  T *      operator->()       noexcept { return std::addressof(this->value_); }
+
+  T const & operator*() const &  noexcept { return this->value_; }
+  T &       operator*()       &  noexcept { return this->value_; }
+  T const &&operator*() const && noexcept { return std::move(this->value_); }
+  T &&      operator*()       && noexcept { return std::move(this->value_); }
+
+  template <typename U>
+  T value_or(U &&def) const & {
+    return bool(*static_cast<S *>(this)) ? **this : static_cast<T>(std::forward<U>(def));
+  }
+  template <typename U>
+  T value_or(U &&def) && {
+    return bool(*static_cast<S *>(this)) ? std::move(**this) : static_cast<T>(std::forward<U>(def));
+  }
+
+  template <typename... A>
+  T &emplace(A &&...args) {
+    static_cast<S *>(this)->reconstruct(in_place, std::forward<A>(args)...);
+    return this->value_;
+  }
+};
+
+template <typename S, typename E>
+struct value_getter<S, void, E> : data_union<void, E> {
+  using data_union<void, E>::data_union;
+
+  value_getter(S const &other) : data_union<T, E>(nullptr) {
+    if (bool(static_cast<S &>(other))) {
+      construct<data_union<T, E>>(this, in_place);
+    } else {
+      construct<data_union<T, E>>(this, unexpected, other.error_);
+    }
+  }
+
+  value_getter(S &&other) : data_union<T, E>(nullptr) {
+    if (bool(static_cast<S &>(other))) {
+      construct<data_union<T, E>>(this, in_place);
+    } else {
+      construct<data_union<T, E>>(this, unexpected, std::move(other.error_));
+    }
+  }
+
+  void emplace() noexcept {
+    static_cast<S *>(this)->reconstruct(in_place);
+  }
+};
+
+template <typename T, typename E>
+struct storage : value_getter<storage<T, E>, T, E> {
+  using getter_t = value_getter<storage<T, E>, T, E>;
+
+  bool has_value_;
+
+  template <typename... A>
+  storage(in_place_t, A &&...args)
+    : getter_t(in_place, std::forward<A>(args)...)
+    , has_value_(true) {}
+
+  template <typename... A>
+  storage(unexpected_t, A &&...args)
+    : getter_t(unexpected, std::forward<A>(args)...)
+    , has_value_(false) {}
+
+  storage(storage const &other)
+    : getter_t(other)
+    , has_value_(other.has_value_) {}
+
+  storage(storage &&other)
+    : getter_t(std::move(other))
+    , has_value_(std::exchange(other.has_value_, false)) {}
+
+  bool has_value() const noexcept {
+    return has_value_;
+  }
+
+  explicit operator bool() const noexcept {
+    return this->has_value();
+  }
+
+  typename std::add_const<E>::type &error() const & noexcept {
+    return this->error_;
+  }
+  E &error() & noexcept {
+    return this->error_;
+  }
+  typename std::add_const<E>::type &&error() const && noexcept {
+    return std::move(this->error_);
+  }
+  E &&error() && noexcept {
+    return std::move(this->error_);
+  }
+
+protected:
+  friend getter_t;
+
+  template <typename... A>
+  void reconstruct(A &&...args) {
+    destroy(this);
+    construct<storage>(this, std::forward<A>(args)...);
+  }
+};
+
+} // namespace detail_expected
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/generic.h b/include/libimp/generic.h
index 37c813cd..0d6190f3 100644
--- a/include/libimp/generic.h
+++ b/include/libimp/generic.h
@@ -10,20 +10,35 @@
 #include <type_traits>
 
 #include "libimp/def.h"
+#include "libimp/detect_plat.h"
 
 LIBIMP_NAMESPACE_BEG_
 
 /**
  * \brief Utility metafunction that maps a sequence of any types to the type void
  * \see https://en.cppreference.com/w/cpp/types/void_t
-*/
+ */
 template <typename...>
 using void_t = void;
 
+/**
+ * \brief To indicate that the contained object should be constructed in-place.
+ * \see https://en.cppreference.com/w/cpp/utility/in_place
+ */
+#if defined(LIBIMP_CPP_17)
+using std::in_place_t;
+using std::in_place;
+#else /*!LIBIMP_CPP_17*/
+struct in_place_t {
+  explicit in_place_t() = default;
+};
+constexpr in_place_t in_place {};
+#endif/*!LIBIMP_CPP_17*/
+
 /**
  * \brief A general pattern for supporting customisable functions
  * \see https://www.open-std.org/jtc1/sc22/WG21/docs/papers/2019/p1895r0.pdf
-*/
+ */
 namespace detail {
 
 void tag_invoke();
diff --git a/test/imp/test_imp_utility.cpp b/test/imp/test_imp_utility.cpp
index e7c2527d..9ab676b2 100644
--- a/test/imp/test_imp_utility.cpp
+++ b/test/imp/test_imp_utility.cpp
@@ -10,6 +10,7 @@
 #include "libimp/countof.h"
 #include "libimp/horrible_cast.h"
 #include "libimp/detect_plat.h"
+#include "libimp/generic.h"
 
 TEST(utility, construct) {
   struct Foo {
@@ -124,4 +125,12 @@ TEST(utility, horrible_cast) {
 #endif
 
   // imp::horrible_cast<std::uint32_t>(0ll);
-}
\ No newline at end of file
+}
+
+#if defined(LIBIMP_CPP_17)
+TEST(utility, in_place) {
+  EXPECT_TRUE((std::is_same<std::in_place_t, imp::in_place_t>::value));
+  [](imp::in_place_t) {}(std::in_place);
+  [](std::in_place_t) {}(imp::in_place);
+}
+#endif/*LIBIMP_CPP_17*/

From 3b781db42e13a154b573f6093a58ec40b2f51b3d Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 12 Feb 2023 16:28:52 +0800
Subject: [PATCH 151/272] upd: [imp] improve `expected`

---
 include/libimp/expected.h | 132 +++++++++++++++++++++++++++++---------
 include/libimp/generic.h  |   9 +++
 2 files changed, 110 insertions(+), 31 deletions(-)

diff --git a/include/libimp/expected.h b/include/libimp/expected.h
index ad68b687..714ea9c9 100644
--- a/include/libimp/expected.h
+++ b/include/libimp/expected.h
@@ -42,6 +42,9 @@ namespace detail_expected {
 
 template <typename T, typename E>
 struct data_union {
+  using const_value_t = typename std::add_const<T>::type;
+  using const_error_t = typename std::add_const<E>::type;
+
   union {
     T value_;  ///< the expected value
     E error_;  ///< the unexpected value
@@ -60,10 +63,22 @@ struct data_union {
 
   void destruct_value() noexcept { destroy(&value_); }
   void destruct_error() noexcept { destroy(&error_); }
+
+  const_value_t & value() const &  noexcept { return value_; }
+  T &             value() &        noexcept { return value_; }
+  const_value_t &&value() const && noexcept { return std::move(value_); }
+  T &&            value() &&       noexcept { return std::move(value_); }
+
+  const_error_t & error() const &  noexcept { return error_; }
+  E &             error() &        noexcept { return error_; }
+  const_error_t &&error() const && noexcept { return std::move(error_); }
+  E &&            error() &&       noexcept { return std::move(error_); }
 };
 
 template <typename E>
 struct data_union<void, E> {
+  using const_error_t = typename std::add_const<E>::type;
+
   alignas(E) std::array<byte, sizeof(E)> error_;  ///< the unexpected value
 
   data_union(data_union const &) = delete;
@@ -80,6 +95,11 @@ struct data_union<void, E> {
 
   void destruct_value() noexcept {}
   void destruct_error() noexcept { destroy(reinterpret_cast<E *>(&error_)); }
+
+  const_error_t & error() const &  noexcept { return *reinterpret_cast<E *>(error_.data()); }
+  E &             error() &        noexcept { return *reinterpret_cast<E *>(error_.data()); }
+  const_error_t &&error() const && noexcept { return std::move(*reinterpret_cast<E *>(error_.data())); }
+  E &&            error() &&       noexcept { return std::move(*reinterpret_cast<E *>(error_.data())); }
 };
 
 template <typename T, typename E>
@@ -120,32 +140,27 @@ struct value_getter : data_union<T, E> {
 
   value_getter(S const &other) : data_union<T, E>(nullptr) {
     if (bool(static_cast<S &>(other))) {
-      construct<data_union<T, E>>(this, in_place, other.value_);
+      construct<data_union<T, E>>(this, in_place, other.value());
     } else {
-      construct<data_union<T, E>>(this, unexpected, other.error_);
+      construct<data_union<T, E>>(this, unexpected, other.error());
     }
   }
 
   value_getter(S &&other) : data_union<T, E>(nullptr) {
     if (bool(static_cast<S &>(other))) {
-      construct<data_union<T, E>>(this, in_place, std::move(other.value_));
+      construct<data_union<T, E>>(this, in_place, std::move(other).value());
     } else {
-      construct<data_union<T, E>>(this, unexpected, std::move(other.error_));
+      construct<data_union<T, E>>(this, unexpected, std::move(other).error());
     }
   }
 
-  T const & value() const &  noexcept { return this->value_; }
-  T &       value()       &  noexcept { return this->value_; }
-  T const &&value() const && noexcept { return std::move(this->value_); }
-  T &&      value()       && noexcept { return std::move(this->value_); }
-
-  T const *operator->() const noexcept { return std::addressof(this->value_); }
-  T *      operator->()       noexcept { return std::addressof(this->value_); }
+  T const *operator->() const noexcept { return std::addressof(this->value()); }
+  T *      operator->()       noexcept { return std::addressof(this->value()); }
 
-  T const & operator*() const &  noexcept { return this->value_; }
-  T &       operator*()       &  noexcept { return this->value_; }
-  T const &&operator*() const && noexcept { return std::move(this->value_); }
-  T &&      operator*()       && noexcept { return std::move(this->value_); }
+  T const & operator*() const &  noexcept { return this->value(); }
+  T &       operator*()       &  noexcept { return this->value(); }
+  T const &&operator*() const && noexcept { return std::move(this->value()); }
+  T &&      operator*()       && noexcept { return std::move(this->value()); }
 
   template <typename U>
   T value_or(U &&def) const & {
@@ -159,7 +174,23 @@ struct value_getter : data_union<T, E> {
   template <typename... A>
   T &emplace(A &&...args) {
     static_cast<S *>(this)->reconstruct(in_place, std::forward<A>(args)...);
-    return this->value_;
+    return this->value();
+  }
+
+  void swap(S &other) {
+    if (bool(*static_cast<S *>(this)) && bool(other)) {
+      std::swap(this->value(), other.value());
+    } else if (!*static_cast<S *>(this) && !other) {
+      std::swap(this->error(), other.error());
+    } else if (!*static_cast<S *>(this) && bool(other)) {
+      E err(std::move(this->error()));
+      this->emplace(std::move(other.value()));
+      other.reconstruct(unexpected, std::move(err));
+    } else /*if (bool(*this) && !other)*/ {
+      E err(std::move(other.error()));
+      other.emplace(std::move(this->value()));
+      static_cast<S *>(this)->reconstruct(unexpected, std::move(err));
+    }
   }
 };
 
@@ -171,7 +202,7 @@ struct value_getter<S, void, E> : data_union<void, E> {
     if (bool(static_cast<S &>(other))) {
       construct<data_union<T, E>>(this, in_place);
     } else {
-      construct<data_union<T, E>>(this, unexpected, other.error_);
+      construct<data_union<T, E>>(this, unexpected, other.error());
     }
   }
 
@@ -179,13 +210,29 @@ struct value_getter<S, void, E> : data_union<void, E> {
     if (bool(static_cast<S &>(other))) {
       construct<data_union<T, E>>(this, in_place);
     } else {
-      construct<data_union<T, E>>(this, unexpected, std::move(other.error_));
+      construct<data_union<T, E>>(this, unexpected, std::move(other).error());
     }
   }
 
   void emplace() noexcept {
     static_cast<S *>(this)->reconstruct(in_place);
   }
+
+  void swap(S &other) {
+    if (bool(*static_cast<S *>(this)) && bool(other)) {
+      return;
+    } else if (!*static_cast<S *>(this) && !other) {
+      std::swap(this->error(), other.error());
+    } else if (!*static_cast<S *>(this) && bool(other)) {
+      E err(std::move(this->error()));
+      this->emplace();
+      other.reconstruct(unexpected, std::move(err));
+    } else /*if (bool(*this) && !other)*/ {
+      E err(std::move(other.error()));
+      other.emplace();
+      static_cast<S *>(this)->reconstruct(unexpected, std::move(err));
+    }
+  }
 };
 
 template <typename T, typename E>
@@ -220,19 +267,6 @@ struct storage : value_getter<storage<T, E>, T, E> {
     return this->has_value();
   }
 
-  typename std::add_const<E>::type &error() const & noexcept {
-    return this->error_;
-  }
-  E &error() & noexcept {
-    return this->error_;
-  }
-  typename std::add_const<E>::type &&error() const && noexcept {
-    return std::move(this->error_);
-  }
-  E &&error() && noexcept {
-    return std::move(this->error_);
-  }
-
 protected:
   friend getter_t;
 
@@ -243,6 +277,42 @@ struct storage : value_getter<storage<T, E>, T, E> {
   }
 };
 
+/// \brief The invoke forwarding helper.
+
+template <typename F, typename... A>
+auto invoke(F &&f, A &&...args) noexcept(
+     noexcept(std::forward<F>(f)(std::forward<A>(args)...)))
+  -> decltype(std::forward<F>(f)(std::forward<A>(args)...)) {
+  return std::forward<F>(f)(std::forward<A>(args)...);
+}
+
+template <typename F, typename... A>
+auto invoke(F &&f, A &&...args) noexcept(
+     noexcept(std::forward<F>(f)()))
+  -> decltype(std::forward<F>(f)()) {
+  return std::forward<F>(f)();
+}
+
+/// \brief and_then helper.
+
+template <typename E, typename F,
+          typename R = decltype(invoke(std::declval<F>(), *std::declval<E>()))>
+R and_then(E &&exp, F &&f) {
+  static_assert(is_specialized<expected, R>::value, "F must return an `expected`.");
+  return bool(exp) ? invoke(std::forward<F>(f), *std::forward<E>(exp))
+                   : R(unexpected, std::forward<E>(exp).error());
+}
+
+/// \brief or_else helper.
+
+template <typename E, typename F,
+          typename R = decltype(invoke(std::declval<F>(), std::declval<E>().error()))>
+R or_else(E &&exp, F &&f) {
+  static_assert(is_specialized<expected, R>::value, "F must return an `expected`.");
+  return bool(exp) ? std::forward<E>(exp)
+                   : invoke(std::forward<F>(f), std::forward<E>(exp).error());
+}
+
 } // namespace detail_expected
 
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/generic.h b/include/libimp/generic.h
index 0d6190f3..0fc8dd6a 100644
--- a/include/libimp/generic.h
+++ b/include/libimp/generic.h
@@ -75,4 +75,13 @@ using is_not_match =
   typename std::enable_if<!detail::is_same_first<T, 
   typename std::decay<A>::type...>::value>::type;
 
+/**
+ * \brief Determines whether a type is specialized from a particular template.
+ */
+template <template <typename...> class Tt, typename T>
+struct is_specialized : std::false_type {};
+
+template <template <typename...> class Tt, typename... A>
+struct is_specialized<Tt, Tt<A...>> : std::true_type {};
+
 LIBIMP_NAMESPACE_END_

From 08839299180a8be57a96c2c769cc11bec3d202c6 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 25 Feb 2023 16:44:57 +0800
Subject: [PATCH 152/272] upd: [imp] improve `expected`

---
 include/libimp/expected.h | 120 ++++++++++++++++++++++++++++++--------
 1 file changed, 97 insertions(+), 23 deletions(-)

diff --git a/include/libimp/expected.h b/include/libimp/expected.h
index 714ea9c9..9c25da30 100644
--- a/include/libimp/expected.h
+++ b/include/libimp/expected.h
@@ -138,19 +138,12 @@ template <typename S, typename T, typename E>
 struct value_getter : data_union<T, E> {
   using data_union<T, E>::data_union;
 
-  value_getter(S const &other) : data_union<T, E>(nullptr) {
-    if (bool(static_cast<S &>(other))) {
-      construct<data_union<T, E>>(this, in_place, other.value());
-    } else {
-      construct<data_union<T, E>>(this, unexpected, other.error());
-    }
-  }
-
-  value_getter(S &&other) : data_union<T, E>(nullptr) {
-    if (bool(static_cast<S &>(other))) {
-      construct<data_union<T, E>>(this, in_place, std::move(other).value());
+  template <typename U>
+  value_getter(U &&other) : data_union<T, E>(nullptr) {
+    if (other) {
+      construct<data_union<T, E>>(this, in_place, std::forward<U>(other).value());
     } else {
-      construct<data_union<T, E>>(this, unexpected, std::move(other).error());
+      construct<data_union<T, E>>(this, unexpected, std::forward<U>(other).error());
     }
   }
 
@@ -198,19 +191,12 @@ template <typename S, typename E>
 struct value_getter<S, void, E> : data_union<void, E> {
   using data_union<void, E>::data_union;
 
-  value_getter(S const &other) : data_union<T, E>(nullptr) {
-    if (bool(static_cast<S &>(other))) {
-      construct<data_union<T, E>>(this, in_place);
-    } else {
-      construct<data_union<T, E>>(this, unexpected, other.error());
-    }
-  }
-
-  value_getter(S &&other) : data_union<T, E>(nullptr) {
-    if (bool(static_cast<S &>(other))) {
+  template <typename U>
+  value_getter(U &&other) : data_union<T, E>(nullptr) {
+    if (other) {
       construct<data_union<T, E>>(this, in_place);
     } else {
-      construct<data_union<T, E>>(this, unexpected, std::move(other).error());
+      construct<data_union<T, E>>(this, unexpected, std::forward<U>(other).error());
     }
   }
 
@@ -235,6 +221,9 @@ struct value_getter<S, void, E> : data_union<void, E> {
   }
 };
 
+/**
+ * \brief Define the expected storage.
+ */
 template <typename T, typename E>
 struct storage : value_getter<storage<T, E>, T, E> {
   using getter_t = value_getter<storage<T, E>, T, E>;
@@ -259,6 +248,16 @@ struct storage : value_getter<storage<T, E>, T, E> {
     : getter_t(std::move(other))
     , has_value_(std::exchange(other.has_value_, false)) {}
 
+  template <typename T_, typename E_>
+  storage(storage<T_, E_> const &other)
+    : getter_t(other)
+    , has_value_(other.has_value_) {}
+
+  template <typename T_, typename E_>
+  storage(storage<T_, E_> &&other)
+    : getter_t(std::move(other))
+    , has_value_(std::exchange(other.has_value_, false)) {}
+
   bool has_value() const noexcept {
     return has_value_;
   }
@@ -315,4 +314,79 @@ R or_else(E &&exp, F &&f) {
 
 } // namespace detail_expected
 
+/**
+ * \class template <typename T, typename E> expected
+ * \brief Provides a way to store either of two values.
+ */
+template <typename T, typename E>
+class expected : public detail_expected::storage<typename std::remove_cv<T>::type, E> {
+ public:
+  using value_type = typename std::remove_cv<T>::type;
+  using error_type = E;
+
+  using detail_expected::storage<value_type, E>::storage;
+
+  expected(expected const &) = default;
+  expected(expected &&) = default;
+
+  expected()
+    : detail_expected::storage<value_type, E>(in_place) {}
+  
+  expected &operator=(expected other) {
+    this->swap(other);
+    return *this;
+  }
+
+  // Monadic operations
+
+  template <typename F>
+  auto and_then(F &&f) & {
+    return detail_expected::and_then(*this, std::forward<F>(f));
+  }
+
+  template <typename F>
+  auto and_then(F &&f) const & {
+    return detail_expected::and_then(*this, std::forward<F>(f));
+  }
+
+  template <typename F>
+  auto and_then(F &&f) && {
+    return detail_expected::and_then(std::move(*this), std::forward<F>(f));
+  }
+
+  template <typename F>
+  auto or_else(F &&f) & {
+    return detail_expected::or_else(*this, std::forward<F>(f));
+  }
+
+  template <typename F>
+  auto or_else(F &&f) const & {
+    return detail_expected::or_else(*this, std::forward<F>(f));
+  }
+
+  template <typename F>
+  auto or_else(F &&f) && {
+    return detail_expected::or_else(std::move(*this), std::forward<F>(f));
+  }
+};
+
+// Compares
+
+template <typename T1, typename E1, typename T2, typename E2>
+bool operator==(expected<T1, E1> const &lhs, expected<T2, E2> const &rhs) {
+  return (lhs.has_value() == rhs.has_value())
+      && (lhs.has_value() ? *lhs == *rhs : lhs.error() == rhs.error());
+}
+
+template <typename E1, typename E2>
+bool operator==(expected<void, E1> const &lhs, expected<void, E2> const &rhs) {
+  return (lhs.has_value() == rhs.has_value())
+      && (lhs.has_value() || lhs.error() == rhs.error());
+}
+
+template <typename T1, typename E1, typename T2, typename E2>
+bool operator!=(expected<T1, E1> const &lhs, expected<T2, E2> const &rhs) {
+  return !(lhs == rhs);
+}
+
 LIBIMP_NAMESPACE_END_

From b75022b4a4be000df8362a71ad13f8125ce568e6 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 5 Mar 2023 18:34:53 +0800
Subject: [PATCH 153/272] add: [imp] expected ut

---
 include/libimp/expected.h      |   8 +-
 test/imp/test_imp_expected.cpp | 146 +++++++++++++++++++++++++++++++++
 2 files changed, 151 insertions(+), 3 deletions(-)
 create mode 100644 test/imp/test_imp_expected.cpp

diff --git a/include/libimp/expected.h b/include/libimp/expected.h
index 9c25da30..587ebd8b 100644
--- a/include/libimp/expected.h
+++ b/include/libimp/expected.h
@@ -246,7 +246,8 @@ struct storage : value_getter<storage<T, E>, T, E> {
 
   storage(storage &&other)
     : getter_t(std::move(other))
-    , has_value_(std::exchange(other.has_value_, false)) {}
+    /// After construction, has_value() is equal to other.has_value().
+    , has_value_(other.has_value_) {}
 
   template <typename T_, typename E_>
   storage(storage<T_, E_> const &other)
@@ -256,7 +257,8 @@ struct storage : value_getter<storage<T, E>, T, E> {
   template <typename T_, typename E_>
   storage(storage<T_, E_> &&other)
     : getter_t(std::move(other))
-    , has_value_(std::exchange(other.has_value_, false)) {}
+    /// After construction, has_value() is equal to other.has_value().
+    , has_value_(other.has_value_) {}
 
   bool has_value() const noexcept {
     return has_value_;
@@ -331,7 +333,7 @@ class expected : public detail_expected::storage<typename std::remove_cv<T>::typ
 
   expected()
     : detail_expected::storage<value_type, E>(in_place) {}
-  
+
   expected &operator=(expected other) {
     this->swap(other);
     return *this;
diff --git a/test/imp/test_imp_expected.cpp b/test/imp/test_imp_expected.cpp
new file mode 100644
index 00000000..21f64402
--- /dev/null
+++ b/test/imp/test_imp_expected.cpp
@@ -0,0 +1,146 @@
+
+#include <utility>
+#include <cstdio>
+#include <cstdint>
+
+#include "gtest/gtest.h"
+
+#include "libimp/expected.h"
+
+namespace {
+
+class test_val {
+public:
+  int val = 0;
+  int dc_ = 0;
+  int cc_ = 0;
+  int mv_ = 0;
+
+  test_val() {
+    dc_ += 1;
+    std::printf("test_val construct.\n");
+  }
+  test_val(test_val const &o)
+    : val(o.val) {
+    cc_ = o.cc_ + 1;
+    std::printf("test_val copy construct.\n");
+  }
+  test_val(test_val &&o) noexcept
+    : val(std::exchange(o.val, 0)) {
+    mv_ = o.mv_ + 1;
+    std::printf("test_val move construct.\n");
+  }
+  ~test_val() {
+    std::printf("test_val destruct.\n");
+  }
+
+  test_val &operator=(test_val &&o) noexcept {
+    mv_ = o.mv_ + 1;
+    val = std::exchange(o.val, 0);
+    return *this;
+  }
+
+  test_val(int v)
+    : val(v) {
+    std::printf("test_val value initialization.\n");
+  }
+
+  bool operator==(test_val const &rhs) const {
+    return val == rhs.val;
+  }
+};
+
+class test_err {
+public:
+  int dc_ = 0;
+  int cc_ = 0;
+  int mv_ = 0;
+  std::int64_t val = 0;
+
+  test_err() {
+    dc_ += 1;
+    std::printf("test_err construct.\n");
+  }
+  test_err(test_err const &o)
+    : val(o.val) {
+    cc_ = o.cc_ + 1;
+    std::printf("test_err copy construct.\n");
+  }
+  test_err(test_err &&o) noexcept
+    : val(std::exchange(o.val, 0)) {
+    mv_ = o.mv_ + 1;
+    std::printf("test_err move construct.\n");
+  }
+  ~test_err() {
+    std::printf("test_err destruct.\n");
+  }
+
+  test_err &operator=(test_err &&o) noexcept {
+    mv_ = o.mv_ + 1;
+    val = std::exchange(o.val, 0);
+    return *this;
+  }
+
+  test_err(int v)
+    : val(v) {
+    std::printf("test_err value initialization.\n");
+  }
+
+  bool operator==(test_err const &rhs) const {
+    return val == rhs.val;
+  }
+};
+
+} // namespace
+
+TEST(expected, in_place) {
+  imp::expected<test_val, test_err> e1;
+  EXPECT_TRUE(e1);
+  EXPECT_EQ(e1.value().dc_, 1);
+  EXPECT_EQ(e1.value().val, 0);
+
+  imp::expected<test_val, test_err> e2 {imp::in_place, 123};
+  EXPECT_TRUE(e2);
+  EXPECT_EQ(e2.value().dc_, 0);
+  EXPECT_EQ(e2.value().val, 123);
+}
+
+TEST(expected, unexpected) {
+  imp::expected<test_val, test_err> e1 {imp::unexpected};
+  EXPECT_FALSE(e1);
+  EXPECT_EQ(e1.error().dc_, 1);
+  EXPECT_EQ(e1.error().val, 0);
+
+  imp::expected<test_val, test_err> e2 {imp::unexpected, 321};
+  EXPECT_FALSE(e2);
+  EXPECT_EQ(e2.error().dc_, 0);
+  EXPECT_EQ(e2.error().val, 321);
+}
+
+TEST(expected, copy_and_move) {
+  imp::expected<test_val, test_err> e1 {imp::in_place, 123};
+  imp::expected<test_val, test_err> e2 {e1};
+  EXPECT_TRUE(e1);
+  EXPECT_TRUE(e2);
+  EXPECT_EQ(e1, e2);
+  EXPECT_EQ(e2.value().cc_, 1);
+  EXPECT_EQ(e2.value().val, 123);
+
+  imp::expected<test_val, test_err> e3 {imp::unexpected, 333};
+  imp::expected<test_val, test_err> e4 {e3};
+  EXPECT_FALSE(e3);
+  EXPECT_FALSE(e4);
+  EXPECT_EQ(e3, e4);
+  EXPECT_EQ(e4.error().cc_, 1);
+  EXPECT_EQ(e4.error().val, 333);
+
+  imp::expected<test_val, test_err> e5;
+  e5 = e1;
+  EXPECT_EQ(e1, e5);
+  EXPECT_EQ(e5.value().val, 123);
+
+  imp::expected<test_val, test_err> e6;
+  e6 = std::move(e5);
+  EXPECT_EQ(e1, e6);
+  EXPECT_EQ(e5.value().val, 0);
+}
\ No newline at end of file

From 43021c1aba12e3d8c0066b86a98d76f4c001f8dd Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 1 Apr 2023 18:01:33 +0800
Subject: [PATCH 154/272] add: [imp] copy_cvref

---
 include/libimp/generic.h      | 38 +++++++++++++++++++++++++++++++++++
 test/imp/test_imp_utility.cpp | 18 +++++++++++++++++
 2 files changed, 56 insertions(+)

diff --git a/include/libimp/generic.h b/include/libimp/generic.h
index 0fc8dd6a..54d12880 100644
--- a/include/libimp/generic.h
+++ b/include/libimp/generic.h
@@ -84,4 +84,42 @@ struct is_specialized : std::false_type {};
 template <template <typename...> class Tt, typename... A>
 struct is_specialized<Tt, Tt<A...>> : std::true_type {};
 
+/**
+ * \brief Copy the cv qualifier and reference of the source type to the target type.
+ */
+template <typename Src, typename Des>
+struct copy_cvref {
+  using type = Des;
+};
+
+template <typename Src, typename Des>
+struct copy_cvref<Src const, Des> {
+  using type = typename std::add_const<Des>::type;
+};
+
+template <typename Src, typename Des>
+struct copy_cvref<Src volatile, Des> {
+  using type = typename std::add_volatile<Des>::type;
+};
+
+template <typename Src, typename Des>
+struct copy_cvref<Src const volatile, Des> {
+  using type = typename std::add_cv<Des>::type;
+};
+
+template <typename Src, typename Des>
+struct copy_cvref<Src &, Des> {
+  using type = typename std::add_lvalue_reference<
+               typename copy_cvref<Src, Des>::type>::type;
+};
+
+template <typename Src, typename Des>
+struct copy_cvref<Src &&, Des> {
+  using type = typename std::add_rvalue_reference<
+               typename copy_cvref<Src, Des>::type>::type;
+};
+
+template <typename Src, typename Des>
+using copy_cvref_t = typename copy_cvref<Src, Des>::type;
+
 LIBIMP_NAMESPACE_END_
diff --git a/test/imp/test_imp_utility.cpp b/test/imp/test_imp_utility.cpp
index 9ab676b2..93b02575 100644
--- a/test/imp/test_imp_utility.cpp
+++ b/test/imp/test_imp_utility.cpp
@@ -134,3 +134,21 @@ TEST(utility, in_place) {
   [](std::in_place_t) {}(imp::in_place);
 }
 #endif/*LIBIMP_CPP_17*/
+
+TEST(utility, copy_cvref) {
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int   , long>, long   >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int & , long>, long & >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int &&, long>, long &&>()));
+
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int const   , long>, long const   >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int const & , long>, long const & >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int const &&, long>, long const &&>()));
+
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int volatile   , long>, long volatile   >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int volatile & , long>, long volatile & >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int volatile &&, long>, long volatile &&>()));
+
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int const volatile   , long>, long const volatile   >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int const volatile & , long>, long const volatile & >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int const volatile &&, long>, long const volatile &&>()));
+}
\ No newline at end of file

From 1565ae0eafadabbd6ab20d4d2c5d79229903ac74 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 2 Apr 2023 21:00:55 +0800
Subject: [PATCH 155/272] upd: [concur] adjust and optimize the comments, as
 well as some other details.

---
 include/libconcur/concurrent.h | 68 +++++++++++++++++-----------------
 include/libconcur/element.h    | 37 ++++++++++++++----
 2 files changed, 64 insertions(+), 41 deletions(-)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index f536e0b4..10a9d88a 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -8,6 +8,7 @@
 
 #include <type_traits>
 #include <atomic>
+#include <array>
 #include <cstdint>
 
 #include "libimp/span.h"
@@ -17,7 +18,7 @@
 
 LIBCONCUR_NAMESPACE_BEG_
 
-/// \brief The queue index type.
+/// \typedef The queue index type.
 using index_t = std::uint32_t;
 
 /// \brief Multiplicity of the relationship.
@@ -31,7 +32,12 @@ class multi  {};
 /// \brief Transmission mode
 namespace trans {
 
-class unicast   {};
+/// \brief In this transmission mode, the message transmission is similar to a queue. 
+/// When the receiving side is not timely enough, the sending side will be unable to write data.
+class unicast {};
+
+/// \brief In this transmission mode, the message will be perceived by each receiver. 
+/// When the receiving side is not timely enough, the sending side will overwrite unread data.
 class broadcast {};
 
 } // namespace trans
@@ -56,7 +62,7 @@ using is_context = decltype(typename std::enable_if<std::is_convertible<decltype
  */
 template <typename C, typename = is_context<C>>
 constexpr index_t trunc_index(C const &ctx, index_t idx) noexcept {
-  /// \remark `circ_size == 2^N` => `idx & (circ_size - 1)`
+  // `circ_size == 2^N` => `idx & (circ_size - 1)`
   return ctx.valid() ? (idx % ctx.circ_size) : 0;
 }
 
@@ -81,8 +87,8 @@ template <>
 struct producer<trans::unicast, relation::single> {
 
   struct context_impl {
-    /// \brief Write index.
-    alignas(cache_line_size) index_t w_idx {0};
+    index_t w_idx {0}; ///< write index
+    private: padding<decltype(w_idx)> ___;
   };
 
   template <typename T, typename C, typename U, 
@@ -93,14 +99,14 @@ struct producer<trans::unicast, relation::single> {
     auto w_cur = trunc_index(ctx, w_idx);
     auto &elem = elems[w_cur];
     auto f_ct  = elem.get_flag();
-    /// \remark Verify index.
+    // Verify index.
     if ((f_ct != state::invalid_value) && 
         (f_ct != w_idx)) {
       return false; // full
     }
-    /// \remark Get a valid index and iterate backwards.
+    // Get a valid index and iterate backwards.
     ctx.w_idx += 1;
-    /// \remark Set data & flag.
+    // Set data & flag.
     elem.set_data(std::forward<U>(src));
     elem.set_flag(static_cast<index_t>(~w_idx));
     return true;
@@ -112,8 +118,8 @@ template <>
 struct producer<trans::unicast, relation::multi> {
 
   struct context_impl {
-    /// \brief Write index.
-    alignas(cache_line_size) std::atomic<index_t> w_idx {0};
+    std::atomic<index_t> w_idx {0}; ///< write index
+    private: padding<decltype(w_idx)> ___;
   };
 
   template <typename T, typename C, typename U, 
@@ -125,16 +131,16 @@ struct producer<trans::unicast, relation::multi> {
       auto w_cur = trunc_index(ctx, w_idx);
       auto &elem = elems[w_cur];
       auto f_ct  = elem.get_flag();
-      /// \remark Verify index.
+      // Verify index.
       if ((f_ct != state::invalid_value) && 
           (f_ct != w_idx)) {
         return false; // full
       }
-      /// \remark Get a valid index and iterate backwards.
+      // Get a valid index and iterate backwards.
       if (!ctx.w_idx.compare_exchange_weak(w_idx, w_idx + 1, std::memory_order_acq_rel)) {
         continue;
       }
-      /// \remark Set data & flag.
+      // Set data & flag.
       elem.set_data(std::forward<U>(src));
       elem.set_flag(static_cast<index_t>(~w_idx));
       return true;
@@ -147,8 +153,8 @@ template <>
 struct consumer<trans::unicast, relation::single> {
 
   struct context_impl {
-    /// \brief Read index.
-    alignas(cache_line_size) index_t r_idx {0};
+    index_t r_idx {0}; ///< read index
+    private: padding<decltype(r_idx)> ___;
   };
 
   template <typename T, typename C, typename U, 
@@ -159,15 +165,15 @@ struct consumer<trans::unicast, relation::single> {
     auto r_cur = trunc_index(ctx, r_idx);
     auto &elem = elems[r_cur];
     auto f_ct  = elem.get_flag();
-    /// \remark Verify index.
+    // Verify index.
     if (f_ct != static_cast<index_t>(~r_idx)) {
       return false; // empty
     }
-    /// \remark Get a valid index and iterate backwards.
+    // Get a valid index and iterate backwards.
     ctx.r_idx += 1;
-    /// \remark Get data & set flag.
-    des = elem.get_data();
-    elem.set_flag(r_idx + static_cast<index_t>(elems.size()));
+    // Get data & set flag.
+    des = LIBCONCUR::get(elem);
+    elem.set_flag(r_idx + static_cast<index_t>(elems.size())/*avoid overflow*/);
     return true;
   }
 };
@@ -177,8 +183,8 @@ template <>
 struct consumer<trans::unicast, relation::multi> {
 
   struct context_impl {
-    /// \brief Read index.
-    alignas(cache_line_size) std::atomic<index_t> r_idx {0};
+    std::atomic<index_t> r_idx {0}; ///< read index
+    private: padding<decltype(r_idx)> ___;
   };
 
   template <typename T, typename C, typename U, 
@@ -190,17 +196,17 @@ struct consumer<trans::unicast, relation::multi> {
       auto r_cur = trunc_index(ctx, r_idx);
       auto &elem = elems[r_cur];
       auto f_ct  = elem.get_flag();
-      /// \remark Verify index.
+      // Verify index.
       if (f_ct != static_cast<index_t>(~r_idx)) {
         return false; // empty
       }
-      /// \remark Get a valid index and iterate backwards.
+      // Get a valid index and iterate backwards.
       if (!ctx.r_idx.compare_exchange_weak(r_idx, r_idx + 1, std::memory_order_acq_rel)) {
         continue;
       }
-      /// \remark Get data & set flag.
-      des = elem.get_data();
-      elem.set_flag(r_idx + static_cast<index_t>(elems.size()));
+      // Get data & set flag.
+      des = LIBCONCUR::get(elem);
+      elem.set_flag(r_idx + static_cast<index_t>(elems.size())/*avoid overflow*/);
       return true;
     }
   }
@@ -220,12 +226,8 @@ template <>
 struct producer<trans::broadcast, relation::multi> {
 };
 
-/// \brief Single-read consumer model implementation.
-template <>
-struct consumer<trans::broadcast, relation::single> {
-};
-
 /// \brief Multi-read consumer model implementation.
+// Single-read consumer model is not required.
 template <>
 struct consumer<trans::broadcast, relation::multi> {
 };
@@ -254,7 +256,7 @@ struct prod_cons : producer<TransModT, ProdModT>
       : circ_size(static_cast<index_t>(elems.size())) {}
 
     constexpr bool valid() const noexcept {
-      /// \remark circ_size must be a power of two.
+      // circ_size must be a power of two.
       return (circ_size > 1) && ((circ_size & (circ_size - 1)) == 0);
     }
   };
diff --git a/include/libconcur/element.h b/include/libconcur/element.h
index 8216a687..e2e48235 100644
--- a/include/libconcur/element.h
+++ b/include/libconcur/element.h
@@ -8,32 +8,50 @@
 
 #include <atomic>
 #include <utility>
-#include <limits>   // std::numeric_limits
 #include <cstdint>
 #include <exception>
 
 #include "libimp/detect_plat.h"
 #include "libimp/log.h"
+#include "libimp/byte.h"
+#include "libimp/generic.h"
 
 #include "libconcur/def.h"
 
 LIBCONCUR_NAMESPACE_BEG_
 namespace state {
 
-/// \brief The state flag type for the queue element.
+/// \typedef The state flag type for the queue element.
 using flag_t = std::uint64_t;
 
 enum : flag_t {
   /// \brief The invalid state value.
-  invalid_value = (std::numeric_limits<flag_t>::max)(),
+  invalid_value = ~flag_t(0),
 };
 
 } // namespace state
 
+/// \brief Define the padding type.
+template <typename T>
+using padding = std::array<::LIBIMP::byte, (cache_line_size - sizeof(T))>;
+
+/**
+ * \class template <typename T> element
+ * \brief User-defined type element wrapper.
+ * Wrapper for wrapping user-defined types as elements.
+ * 
+ * @tparam T - User-defined type.
+ */
 template <typename T>
 class element {
+
+  template <typename E>
+  friend auto get(E &&elem) noexcept;
+
   /// \brief Committed flag.
-  alignas(cache_line_size) std::atomic<state::flag_t> f_ct_;
+  std::atomic<state::flag_t> f_ct_;
+  padding<decltype(f_ct_)> ___;
+
   /// \brief The user data segment.
   T data_;
 
@@ -42,6 +60,8 @@ class element {
   element &operator=(element const &) = delete;
 
 public:
+  using value_type = T;
+
   template <typename... A>
   element(A &&... args) 
     noexcept(noexcept(T{std::forward<A>(args)...}))
@@ -60,10 +80,6 @@ class element {
     }
   }
 
-  T &&get_data() noexcept {
-    return std::move(data_);
-  }
-
   void set_flag(state::flag_t flag) noexcept {
     f_ct_.store(flag, std::memory_order_release);
   }
@@ -73,4 +89,9 @@ class element {
   }
 };
 
+template <typename E>
+auto get(E &&elem) noexcept {
+  return static_cast<imp::copy_cvref_t<E, typename std::decay<E>::type::value_type>>(elem.data_);
+}
+
 LIBCONCUR_NAMESPACE_END_

From 7e1f9f306e7840432aff79f20ffe98b8e8c91613 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 2 Apr 2023 21:06:35 +0800
Subject: [PATCH 156/272] =?UTF-8?q?fix:=20[imp]=20=E2=80=98T=E2=80=99=20wa?=
 =?UTF-8?q?s=20not=20declared=20in=20this=20scope.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 include/libimp/expected.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/libimp/expected.h b/include/libimp/expected.h
index 587ebd8b..533e3552 100644
--- a/include/libimp/expected.h
+++ b/include/libimp/expected.h
@@ -192,11 +192,11 @@ struct value_getter<S, void, E> : data_union<void, E> {
   using data_union<void, E>::data_union;
 
   template <typename U>
-  value_getter(U &&other) : data_union<T, E>(nullptr) {
+  value_getter(U &&other) : data_union<void, E>(nullptr) {
     if (other) {
-      construct<data_union<T, E>>(this, in_place);
+      construct<data_union<void, E>>(this, in_place);
     } else {
-      construct<data_union<T, E>>(this, unexpected, std::forward<U>(other).error());
+      construct<data_union<void, E>>(this, unexpected, std::forward<U>(other).error());
     }
   }
 

From bb67bd9ddc670a8697c6798bf98bdaf1ed801804 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Wed, 5 Apr 2023 15:31:21 +0800
Subject: [PATCH 157/272] upd: [concur] context => header

---
 include/libconcur/concurrent.h         | 98 +++++++++++++-------------
 test/concur/test_concur_concurrent.cpp | 88 +++++++++++------------
 2 files changed, 93 insertions(+), 93 deletions(-)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index 10a9d88a..cbc7169a 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -44,26 +44,26 @@ class broadcast {};
 
 /// \brief Determines whether type T can be implicitly converted to type U.
 template <typename T, typename U>
-using is_convertible = typename std::enable_if<std::is_convertible<T *, U *>::value>::type;
+using is_convertible = std::enable_if_t<std::is_convertible<T *, U *>::value, bool>;
 
-/// \brief Check whether the context type is valid.
+/// \brief Check whether the elems header type is valid.
 template <typename T>
-using is_context = decltype(typename std::enable_if<std::is_convertible<decltype(
-  std::declval<T>().valid()), bool>::value>::type(), 
-  std::declval<index_t>() % std::declval<T>().circ_size);
+using is_elems_header = decltype(
+  std::declval<index_t>() % std::declval<T>().circ_size, 
+  std::enable_if_t<std::is_convertible<decltype(std::declval<T>().valid()), bool>::value, bool>{});
 
 /**
  * \brief Calculate the corresponding queue position modulo the index value.
  * 
- * \tparam C a context type
- * \param ctx a context object
- * \param idx a context array index
+ * \tparam H a elems header type
+ * \param hdr a elems header object
+ * \param idx a elems array index
  * \return index_t - a corresponding queue position
  */
-template <typename C, typename = is_context<C>>
-constexpr index_t trunc_index(C const &ctx, index_t idx) noexcept {
+template <typename H, is_elems_header<H> = true>
+constexpr index_t trunc_index(H const &hdr, index_t idx) noexcept {
   // `circ_size == 2^N` => `idx & (circ_size - 1)`
-  return ctx.valid() ? (idx % ctx.circ_size) : 0;
+  return hdr.valid() ? (idx % hdr.circ_size) : 0;
 }
 
 /// \brief Producer algorithm implementation.
@@ -86,17 +86,17 @@ struct consumer;
 template <>
 struct producer<trans::unicast, relation::single> {
 
-  struct context_impl {
+  struct header_impl {
     index_t w_idx {0}; ///< write index
     private: padding<decltype(w_idx)> ___;
   };
 
-  template <typename T, typename C, typename U, 
-            typename = is_context<C>,
-            typename = is_convertible<C, context_impl>>
-  static bool enqueue(::LIBIMP::span<element<T>> elems, C &ctx, U &&src) noexcept {
-    auto w_idx = ctx.w_idx;
-    auto w_cur = trunc_index(ctx, w_idx);
+  template <typename T, typename H, typename U, 
+            is_elems_header<H> = true,
+            is_convertible<H, header_impl> = true>
+  static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, U &&src) noexcept {
+    auto w_idx = hdr.w_idx;
+    auto w_cur = trunc_index(hdr, w_idx);
     auto &elem = elems[w_cur];
     auto f_ct  = elem.get_flag();
     // Verify index.
@@ -105,7 +105,7 @@ struct producer<trans::unicast, relation::single> {
       return false; // full
     }
     // Get a valid index and iterate backwards.
-    ctx.w_idx += 1;
+    hdr.w_idx += 1;
     // Set data & flag.
     elem.set_data(std::forward<U>(src));
     elem.set_flag(static_cast<index_t>(~w_idx));
@@ -117,18 +117,18 @@ struct producer<trans::unicast, relation::single> {
 template <>
 struct producer<trans::unicast, relation::multi> {
 
-  struct context_impl {
+  struct header_impl {
     std::atomic<index_t> w_idx {0}; ///< write index
     private: padding<decltype(w_idx)> ___;
   };
 
-  template <typename T, typename C, typename U, 
-            typename = is_context<C>,
-            typename = is_convertible<C, context_impl>>
-  static bool enqueue(::LIBIMP::span<element<T>> elems, C &ctx, U &&src) noexcept {
-    auto w_idx = ctx.w_idx.load(std::memory_order_acquire);
+  template <typename T, typename H, typename U, 
+            is_elems_header<H> = true,
+            is_convertible<H, header_impl> = true>
+  static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, U &&src) noexcept {
+    auto w_idx = hdr.w_idx.load(std::memory_order_acquire);
     for (;;) {
-      auto w_cur = trunc_index(ctx, w_idx);
+      auto w_cur = trunc_index(hdr, w_idx);
       auto &elem = elems[w_cur];
       auto f_ct  = elem.get_flag();
       // Verify index.
@@ -137,7 +137,7 @@ struct producer<trans::unicast, relation::multi> {
         return false; // full
       }
       // Get a valid index and iterate backwards.
-      if (!ctx.w_idx.compare_exchange_weak(w_idx, w_idx + 1, std::memory_order_acq_rel)) {
+      if (!hdr.w_idx.compare_exchange_weak(w_idx, w_idx + 1, std::memory_order_acq_rel)) {
         continue;
       }
       // Set data & flag.
@@ -152,17 +152,17 @@ struct producer<trans::unicast, relation::multi> {
 template <>
 struct consumer<trans::unicast, relation::single> {
 
-  struct context_impl {
+  struct header_impl {
     index_t r_idx {0}; ///< read index
     private: padding<decltype(r_idx)> ___;
   };
 
-  template <typename T, typename C, typename U, 
-            typename = is_context<C>,
-            typename = is_convertible<C, context_impl>>
-  static bool dequeue(::LIBIMP::span<element<T>> elems, C &ctx, U &des) noexcept {
-    auto r_idx = ctx.r_idx;
-    auto r_cur = trunc_index(ctx, r_idx);
+  template <typename T, typename H, typename U, 
+            is_elems_header<H> = true,
+            is_convertible<H, header_impl> = true>
+  static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, U &des) noexcept {
+    auto r_idx = hdr.r_idx;
+    auto r_cur = trunc_index(hdr, r_idx);
     auto &elem = elems[r_cur];
     auto f_ct  = elem.get_flag();
     // Verify index.
@@ -170,7 +170,7 @@ struct consumer<trans::unicast, relation::single> {
       return false; // empty
     }
     // Get a valid index and iterate backwards.
-    ctx.r_idx += 1;
+    hdr.r_idx += 1;
     // Get data & set flag.
     des = LIBCONCUR::get(elem);
     elem.set_flag(r_idx + static_cast<index_t>(elems.size())/*avoid overflow*/);
@@ -182,18 +182,18 @@ struct consumer<trans::unicast, relation::single> {
 template <>
 struct consumer<trans::unicast, relation::multi> {
 
-  struct context_impl {
+  struct header_impl {
     std::atomic<index_t> r_idx {0}; ///< read index
     private: padding<decltype(r_idx)> ___;
   };
 
-  template <typename T, typename C, typename U, 
-            typename = is_context<C>,
-            typename = is_convertible<C, context_impl>>
-  static bool dequeue(::LIBIMP::span<element<T>> elems, C &ctx, U &des) noexcept {
-    auto r_idx = ctx.r_idx.load(std::memory_order_acquire);
+  template <typename T, typename H, typename U, 
+            is_elems_header<H> = true,
+            is_convertible<H, header_impl> = true>
+  static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, U &des) noexcept {
+    auto r_idx = hdr.r_idx.load(std::memory_order_acquire);
     for (;;) {
-      auto r_cur = trunc_index(ctx, r_idx);
+      auto r_cur = trunc_index(hdr, r_idx);
       auto &elem = elems[r_cur];
       auto f_ct  = elem.get_flag();
       // Verify index.
@@ -201,7 +201,7 @@ struct consumer<trans::unicast, relation::multi> {
         return false; // empty
       }
       // Get a valid index and iterate backwards.
-      if (!ctx.r_idx.compare_exchange_weak(r_idx, r_idx + 1, std::memory_order_acq_rel)) {
+      if (!hdr.r_idx.compare_exchange_weak(r_idx, r_idx + 1, std::memory_order_acq_rel)) {
         continue;
       }
       // Get data & set flag.
@@ -227,7 +227,7 @@ struct producer<trans::broadcast, relation::multi> {
 };
 
 /// \brief Multi-read consumer model implementation.
-// Single-read consumer model is not required.
+/// Single-read consumer model is not required.
 template <>
 struct consumer<trans::broadcast, relation::multi> {
 };
@@ -243,16 +243,16 @@ template <typename TransModT, typename ProdModT, typename ConsModT>
 struct prod_cons : producer<TransModT, ProdModT>
                  , consumer<TransModT, ConsModT> {
 
-  /// \brief Mixing producer and consumer context definitions.
-  struct context : producer<TransModT, ProdModT>::context_impl
-                 , consumer<TransModT, ConsModT>::context_impl {
+  /// \brief Mixing producer and consumer header definitions.
+  struct header : producer<TransModT, ProdModT>::header_impl
+                , consumer<TransModT, ConsModT>::header_impl {
     index_t const circ_size;
 
-    constexpr context(index_t cs) noexcept
+    constexpr header(index_t cs) noexcept
       : circ_size(cs) {}
 
     template <typename T>
-    constexpr context(::LIBIMP::span<element<T>> elems) noexcept
+    constexpr header(::LIBIMP::span<element<T>> elems) noexcept
       : circ_size(static_cast<index_t>(elems.size())) {}
 
     constexpr bool valid() const noexcept {
diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index 6c439304..e32d7a82 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -23,7 +23,7 @@ TEST(concurrent, index_and_flag) {
 }
 
 TEST(concurrent, trunc_index) {
-  struct context {
+  struct header {
     concur::index_t circ_size;
 
     bool valid() const noexcept {
@@ -32,60 +32,60 @@ TEST(concurrent, trunc_index) {
   };
 
   /// @brief circ-size = 0
-  EXPECT_EQ(concur::trunc_index(context{0}, 0), 0);
-  EXPECT_EQ(concur::trunc_index(context{0}, 1), 0);
-  EXPECT_EQ(concur::trunc_index(context{0}, 2), 0);
-  EXPECT_EQ(concur::trunc_index(context{0}, 16), 0);
-  EXPECT_EQ(concur::trunc_index(context{0}, 111), 0);
-  EXPECT_EQ(concur::trunc_index(context{0}, -1), 0);
+  EXPECT_EQ(concur::trunc_index(header{0}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{0}, 1), 0);
+  EXPECT_EQ(concur::trunc_index(header{0}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(header{0}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(header{0}, 111), 0);
+  EXPECT_EQ(concur::trunc_index(header{0}, -1), 0);
 
   /// @brief circ-size = 1
-  EXPECT_EQ(concur::trunc_index(context{1}, 0), 0);
-  EXPECT_EQ(concur::trunc_index(context{1}, 1), 0);
-  EXPECT_EQ(concur::trunc_index(context{1}, 2), 0);
-  EXPECT_EQ(concur::trunc_index(context{1}, 16), 0);
-  EXPECT_EQ(concur::trunc_index(context{1}, 111), 0);
-  EXPECT_EQ(concur::trunc_index(context{1}, -1), 0);
+  EXPECT_EQ(concur::trunc_index(header{1}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{1}, 1), 0);
+  EXPECT_EQ(concur::trunc_index(header{1}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(header{1}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(header{1}, 111), 0);
+  EXPECT_EQ(concur::trunc_index(header{1}, -1), 0);
 
   /// @brief circ-size = 2
-  EXPECT_EQ(concur::trunc_index(context{2}, 0), 0);
-  EXPECT_EQ(concur::trunc_index(context{2}, 1), 1);
-  EXPECT_EQ(concur::trunc_index(context{2}, 2), 0);
-  EXPECT_EQ(concur::trunc_index(context{2}, 16), 0);
-  EXPECT_EQ(concur::trunc_index(context{2}, 111), 1);
-  EXPECT_EQ(concur::trunc_index(context{2}, -1), 1);
+  EXPECT_EQ(concur::trunc_index(header{2}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{2}, 1), 1);
+  EXPECT_EQ(concur::trunc_index(header{2}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(header{2}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(header{2}, 111), 1);
+  EXPECT_EQ(concur::trunc_index(header{2}, -1), 1);
 
   /// @brief circ-size = 10
-  EXPECT_EQ(concur::trunc_index(context{10}, 0), 0);
-  EXPECT_EQ(concur::trunc_index(context{10}, 1), 0);
-  EXPECT_EQ(concur::trunc_index(context{10}, 2), 0);
-  EXPECT_EQ(concur::trunc_index(context{10}, 16), 0);
-  EXPECT_EQ(concur::trunc_index(context{10}, 111), 0);
-  EXPECT_EQ(concur::trunc_index(context{10}, -1), 0);
+  EXPECT_EQ(concur::trunc_index(header{10}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{10}, 1), 0);
+  EXPECT_EQ(concur::trunc_index(header{10}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(header{10}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(header{10}, 111), 0);
+  EXPECT_EQ(concur::trunc_index(header{10}, -1), 0);
 
   /// @brief circ-size = 16
-  EXPECT_EQ(concur::trunc_index(context{16}, 0), 0);
-  EXPECT_EQ(concur::trunc_index(context{16}, 1), 1);
-  EXPECT_EQ(concur::trunc_index(context{16}, 2), 2);
-  EXPECT_EQ(concur::trunc_index(context{16}, 16), 0);
-  EXPECT_EQ(concur::trunc_index(context{16}, 111), 15);
-  EXPECT_EQ(concur::trunc_index(context{16}, -1), 15);
+  EXPECT_EQ(concur::trunc_index(header{16}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{16}, 1), 1);
+  EXPECT_EQ(concur::trunc_index(header{16}, 2), 2);
+  EXPECT_EQ(concur::trunc_index(header{16}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(header{16}, 111), 15);
+  EXPECT_EQ(concur::trunc_index(header{16}, -1), 15);
 
   /// @brief circ-size = (index_t)-1
-  EXPECT_EQ(concur::trunc_index(context{(concur::index_t)-1}, 0), 0);
-  EXPECT_EQ(concur::trunc_index(context{(concur::index_t)-1}, 1), 0);
-  EXPECT_EQ(concur::trunc_index(context{(concur::index_t)-1}, 2), 0);
-  EXPECT_EQ(concur::trunc_index(context{(concur::index_t)-1}, 16), 0);
-  EXPECT_EQ(concur::trunc_index(context{(concur::index_t)-1}, 111), 0);
-  EXPECT_EQ(concur::trunc_index(context{(concur::index_t)-1}, -1), 0);
+  EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 1), 0);
+  EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 111), 0);
+  EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, -1), 0);
 
   /// @brief circ-size = 2147483648 (2^31)
-  EXPECT_EQ(concur::trunc_index(context{2147483648u}, 0), 0);
-  EXPECT_EQ(concur::trunc_index(context{2147483648u}, 1), 1);
-  EXPECT_EQ(concur::trunc_index(context{2147483648u}, 2), 2);
-  EXPECT_EQ(concur::trunc_index(context{2147483648u}, 16), 16);
-  EXPECT_EQ(concur::trunc_index(context{2147483648u}, 111), 111);
-  EXPECT_EQ(concur::trunc_index(context{2147483648u}, -1), 2147483647);
+  EXPECT_EQ(concur::trunc_index(header{2147483648u}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{2147483648u}, 1), 1);
+  EXPECT_EQ(concur::trunc_index(header{2147483648u}, 2), 2);
+  EXPECT_EQ(concur::trunc_index(header{2147483648u}, 16), 16);
+  EXPECT_EQ(concur::trunc_index(header{2147483648u}, 111), 111);
+  EXPECT_EQ(concur::trunc_index(header{2147483648u}, -1), 2147483647);
 }
 
 namespace {
@@ -99,7 +99,7 @@ void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
 
   concur::element<std::uint64_t> circ[32] {};
   PC pc;
-  typename PC::context ctx {imp::make_span(circ)};
+  typename PC::header ctx {imp::make_span(circ)};
   ASSERT_TRUE(ctx.valid());
 
   std::atomic<std::uint64_t> sum {0};

From 33768dd79d8e0d7101e7f4b5b2cf8af3221a1a6e Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Wed, 5 Apr 2023 15:51:13 +0800
Subject: [PATCH 158/272] add: [concur] utility template for extracting object
 type internal traits.

---
 include/libconcur/concurrent.h         | 84 +++++++++++++++++++++++---
 test/concur/test_concur_concurrent.cpp |  9 +--
 2 files changed, 80 insertions(+), 13 deletions(-)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index cbc7169a..23b330dd 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -12,6 +12,7 @@
 #include <cstdint>
 
 #include "libimp/span.h"
+#include "libimp/generic.h"
 
 #include "libconcur/def.h"
 #include "libconcur/element.h"
@@ -21,6 +22,71 @@ LIBCONCUR_NAMESPACE_BEG_
 /// \typedef The queue index type.
 using index_t = std::uint32_t;
 
+namespace detail_concurrent {
+
+template <typename T, typename = void>
+struct has_header : std::false_type {};
+template <typename T>
+struct has_header<T, ::LIBIMP::void_t<typename T::header>>
+  : std::true_type {};
+
+template <typename T, typename = void>
+struct has_header_impl : std::false_type {};
+template <typename T>
+struct has_header_impl<T, ::LIBIMP::void_t<typename T::header_impl>>
+  : std::true_type {};
+
+template <typename T, typename = void>
+struct has_context : std::false_type {};
+template <typename T>
+struct has_context<T, ::LIBIMP::void_t<typename T::context>>
+  : std::true_type {};
+
+template <typename T, typename = void>
+struct has_context_impl : std::false_type {};
+template <typename T>
+struct has_context_impl<T, ::LIBIMP::void_t<typename T::context_impl>>
+  : std::true_type {};
+
+template <typename T, bool = has_header<T>{}
+                    , bool = has_header_impl<T>{}>
+struct traits_header {
+  struct header {};
+};
+
+template <typename T, bool HasH>
+struct traits_header<T, true, HasH> {
+  using header = typename T::header;
+};
+
+template <typename T>
+struct traits_header<T, false, true> {
+  using header = typename T::header_impl;
+};
+
+template <typename T, bool = has_context<T>{}
+                    , bool = has_context_impl<T>{}>
+struct traits_context {
+  struct context {};
+};
+
+template <typename T, bool HasH>
+struct traits_context<T, true, HasH> {
+  using context = typename T::context;
+};
+
+template <typename T>
+struct traits_context<T, false, true> {
+  using context = typename T::context_impl;
+};
+
+} // namespace detail_concurrent
+
+/// \typedef Utility template for extracting object type internal traits.
+template <typename T>
+struct traits : detail_concurrent::traits_header<T>
+              , detail_concurrent::traits_context<T> {};
+
 /// \brief Multiplicity of the relationship.
 namespace relation {
 
@@ -91,10 +157,10 @@ struct producer<trans::unicast, relation::single> {
     private: padding<decltype(w_idx)> ___;
   };
 
-  template <typename T, typename H, typename U, 
+  template <typename T, typename H, typename C, typename U, 
             is_elems_header<H> = true,
             is_convertible<H, header_impl> = true>
-  static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, U &&src) noexcept {
+  static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
     auto w_idx = hdr.w_idx;
     auto w_cur = trunc_index(hdr, w_idx);
     auto &elem = elems[w_cur];
@@ -122,10 +188,10 @@ struct producer<trans::unicast, relation::multi> {
     private: padding<decltype(w_idx)> ___;
   };
 
-  template <typename T, typename H, typename U, 
+  template <typename T, typename H, typename C, typename U, 
             is_elems_header<H> = true,
             is_convertible<H, header_impl> = true>
-  static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, U &&src) noexcept {
+  static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
     auto w_idx = hdr.w_idx.load(std::memory_order_acquire);
     for (;;) {
       auto w_cur = trunc_index(hdr, w_idx);
@@ -157,10 +223,10 @@ struct consumer<trans::unicast, relation::single> {
     private: padding<decltype(r_idx)> ___;
   };
 
-  template <typename T, typename H, typename U, 
+  template <typename T, typename H, typename C, typename U, 
             is_elems_header<H> = true,
             is_convertible<H, header_impl> = true>
-  static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, U &des) noexcept {
+  static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &des) noexcept {
     auto r_idx = hdr.r_idx;
     auto r_cur = trunc_index(hdr, r_idx);
     auto &elem = elems[r_cur];
@@ -187,10 +253,10 @@ struct consumer<trans::unicast, relation::multi> {
     private: padding<decltype(r_idx)> ___;
   };
 
-  template <typename T, typename H, typename U, 
+  template <typename T, typename H, typename C, typename U, 
             is_elems_header<H> = true,
             is_convertible<H, header_impl> = true>
-  static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, U &des) noexcept {
+  static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &des) noexcept {
     auto r_idx = hdr.r_idx.load(std::memory_order_acquire);
     for (;;) {
       auto r_cur = trunc_index(hdr, r_idx);
@@ -252,7 +318,7 @@ struct prod_cons : producer<TransModT, ProdModT>
       : circ_size(cs) {}
 
     template <typename T>
-    constexpr header(::LIBIMP::span<element<T>> elems) noexcept
+    constexpr header(::LIBIMP::span<element<T>> const &elems) noexcept
       : circ_size(static_cast<index_t>(elems.size())) {}
 
     constexpr bool valid() const noexcept {
diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index e32d7a82..ac6446bf 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -99,8 +99,9 @@ void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
 
   concur::element<std::uint64_t> circ[32] {};
   PC pc;
-  typename PC::header ctx {imp::make_span(circ)};
-  ASSERT_TRUE(ctx.valid());
+  typename concur::traits<PC>::header hdr {imp::make_span(circ)};
+  typename concur::traits<PC>::context ctx {};
+  ASSERT_TRUE(hdr.valid());
 
   std::atomic<std::uint64_t> sum {0};
   std::atomic<std::size_t> running {np};
@@ -108,7 +109,7 @@ void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
   auto prod_call = [&](std::size_t n) {
     for (std::uint32_t i = 1; i <= loop_size; ++i) {
       std::this_thread::yield();
-      while (!pc.enqueue(imp::make_span(circ), ctx, i)) {
+      while (!pc.enqueue(imp::make_span(circ), hdr, ctx, i)) {
         std::this_thread::yield();
       }
       if (i % (loop_size / 10) == 0) {
@@ -121,7 +122,7 @@ void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
     for (;;) {
       std::this_thread::yield();
       std::uint64_t i;
-      while (!pc.dequeue(imp::make_span(circ), ctx, i)) {
+      while (!pc.dequeue(imp::make_span(circ), hdr, ctx, i)) {
         if (running == 0) return;
         std::this_thread::yield();
       }

From a80d7f7590528c2def13808d8cf18ce04e29c2f6 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Wed, 5 Apr 2023 19:21:15 +0800
Subject: [PATCH 159/272] add: [imp] (TBD) impl trans::broadcast

---
 include/libconcur/concurrent.h         | 87 +++++++++++++++++++++++---
 include/libconcur/element.h            | 16 ++++-
 test/concur/test_concur_concurrent.cpp |  2 +-
 3 files changed, 91 insertions(+), 14 deletions(-)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index 23b330dd..3e0489fe 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -225,7 +225,8 @@ struct consumer<trans::unicast, relation::single> {
 
   template <typename T, typename H, typename C, typename U, 
             is_elems_header<H> = true,
-            is_convertible<H, header_impl> = true>
+            is_convertible<H, header_impl> = true,
+            std::enable_if_t<std::is_nothrow_move_assignable<U>::value, bool> = true>
   static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &des) noexcept {
     auto r_idx = hdr.r_idx;
     auto r_cur = trunc_index(hdr, r_idx);
@@ -238,8 +239,8 @@ struct consumer<trans::unicast, relation::single> {
     // Get a valid index and iterate backwards.
     hdr.r_idx += 1;
     // Get data & set flag.
-    des = LIBCONCUR::get(elem);
-    elem.set_flag(r_idx + static_cast<index_t>(elems.size())/*avoid overflow*/);
+    des = LIBCONCUR::get(std::move(elem));
+    elem.set_flag(r_idx + hdr.circ_size);
     return true;
   }
 };
@@ -255,7 +256,8 @@ struct consumer<trans::unicast, relation::multi> {
 
   template <typename T, typename H, typename C, typename U, 
             is_elems_header<H> = true,
-            is_convertible<H, header_impl> = true>
+            is_convertible<H, header_impl> = true,
+            std::enable_if_t<std::is_nothrow_move_assignable<U>::value, bool> = true>
   static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &des) noexcept {
     auto r_idx = hdr.r_idx.load(std::memory_order_acquire);
     for (;;) {
@@ -271,8 +273,8 @@ struct consumer<trans::unicast, relation::multi> {
         continue;
       }
       // Get data & set flag.
-      des = LIBCONCUR::get(elem);
-      elem.set_flag(r_idx + static_cast<index_t>(elems.size())/*avoid overflow*/);
+      des = LIBCONCUR::get(std::move(elem));
+      elem.set_flag(r_idx + hdr.circ_size);
       return true;
     }
   }
@@ -285,17 +287,82 @@ struct consumer<trans::unicast, relation::multi> {
 /// \brief Single-write producer model implementation.
 template <>
 struct producer<trans::broadcast, relation::single> {
+
+  struct header_impl {
+    std::atomic<index_t> w_idx {0}; ///< write index
+    private: padding<decltype(w_idx)> ___;
+  };
+
+  template <typename T, typename H, typename C, typename U, 
+            is_elems_header<H> = true,
+            is_convertible<H, header_impl> = true>
+  static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
+    auto w_idx = hdr.w_idx.load(std::memory_order_acquire);
+    auto w_cur = trunc_index(hdr, w_idx);
+    auto &elem = elems[w_cur];
+    auto f_ct  = elem.get_flag();
+    // Verify index.
+    if ((f_ct != state::invalid_value) && 
+        (f_ct != state::dequeued)) {
+      return false; // full
+    }
+    // Get a valid index and iterate backwards.
+    hdr.w_idx.fetch_add(1, std::memory_order_release);
+    // Set data & flag.
+    elem.set_flag(w_idx | state::enqueue_mask);
+    elem.set_data(std::forward<U>(src));
+    elem.set_flag(w_idx | state::commit_mask);
+    return true;
+  }
 };
 
 /// \brief Multi-write producer model implementation.
 template <>
-struct producer<trans::broadcast, relation::multi> {
-};
+struct producer<trans::broadcast, relation::multi> {};
 
 /// \brief Multi-read consumer model implementation.
 /// Single-read consumer model is not required.
 template <>
 struct consumer<trans::broadcast, relation::multi> {
+
+  struct context_impl {
+    index_t       r_idx {0};                    ///< read index
+    state::flag_t w_lst {state::invalid_value}; ///< last write index
+  };
+
+  template <typename T, typename H, typename C, typename U, 
+            is_elems_header<H> = true,
+            is_convertible<C, context_impl> = true,
+            std::enable_if_t<std::is_nothrow_copy_assignable<U>::value, bool> = true>
+  static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, C &ctx, U &des) noexcept {
+    auto r_idx = ctx.r_idx;
+    auto w_idx = static_cast<index_t>(hdr.w_idx.load(std::memory_order_relaxed));
+    auto r_cur = trunc_index(hdr, r_idx);
+    auto const &elem = elems[r_cur];
+    // Verify index.
+    if ((ctx.w_lst != state::invalid_value) &&
+        (ctx.w_lst + hdr.circ_size > w_idx)) {
+      return false; // not ready
+    }
+    auto f_ct = elem.get_flag();
+    if (f_ct == state::invalid_value) {
+      return false; // empty
+    }
+    // Try getting data.
+    for (;;) {
+      if (f_ct & state::enqueue_mask == state::enqueue_mask) {
+        return false; // unreadable
+      }
+      des = LIBCONCUR::get(elem);
+      // Correct data can be obtained only if 
+      // the elem data is not modified during the getting process.
+      if (elem.cas_flag(f_ct, state::dequeued)) break;
+    }
+    // Get a valid index and iterate backwards.
+    ctx.r_idx += 1;
+    ctx.w_lst = w_idx;
+    return true;
+  }
 };
 
 /**
@@ -310,8 +377,8 @@ struct prod_cons : producer<TransModT, ProdModT>
                  , consumer<TransModT, ConsModT> {
 
   /// \brief Mixing producer and consumer header definitions.
-  struct header : producer<TransModT, ProdModT>::header_impl
-                , consumer<TransModT, ConsModT>::header_impl {
+  struct header : traits<producer<TransModT, ProdModT>>::header
+                , traits<consumer<TransModT, ConsModT>>::header {
     index_t const circ_size;
 
     constexpr header(index_t cs) noexcept
diff --git a/include/libconcur/element.h b/include/libconcur/element.h
index e2e48235..8dd3f398 100644
--- a/include/libconcur/element.h
+++ b/include/libconcur/element.h
@@ -25,8 +25,12 @@ namespace state {
 using flag_t = std::uint64_t;
 
 enum : flag_t {
-  /// \brief The invalid state value.
   invalid_value = ~flag_t(0),
+  committed     = ~flag_t(1),
+  dequeued      = ~flag_t(2),
+
+  enqueue_mask  = invalid_value << 32,
+  commit_mask   = committed << 32,
 };
 
 } // namespace state
@@ -80,8 +84,14 @@ class element {
     }
   }
 
-  void set_flag(state::flag_t flag) noexcept {
-    f_ct_.store(flag, std::memory_order_release);
+  void set_flag(state::flag_t flag, 
+                std::memory_order const order = std::memory_order_release) noexcept {
+    f_ct_.store(flag, order);
+  }
+
+  bool cas_flag(state::flag_t &expected, state::flag_t flag, 
+                std::memory_order const order = std::memory_order_acq_rel) noexcept {
+    return f_ct_.compare_exchange_weak(expected, flag, order);
   }
 
   state::flag_t get_flag() const noexcept {
diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index ac6446bf..0f2d1535 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -143,7 +143,7 @@ void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
 
 } // namespace
 
-TEST(concurrent, prod_cons) {
+TEST(concurrent, unicast_prod_cons) {
   using namespace concur;
 
   /// @brief 1-1

From 32585a39f316c7231d43f682d18abab28f25e11e Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 9 Apr 2023 15:17:10 +0800
Subject: [PATCH 160/272] upd: [concur] (TBD) continue the implementation of
 the broadcast pattern.

---
 include/libconcur/concurrent.h         | 43 +++++++-----
 include/libconcur/element.h            |  5 +-
 test/concur/test_concur_concurrent.cpp | 90 ++++++++++++++++++++++----
 3 files changed, 105 insertions(+), 33 deletions(-)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index 3e0489fe..12058bf6 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -289,8 +289,10 @@ template <>
 struct producer<trans::broadcast, relation::single> {
 
   struct header_impl {
-    std::atomic<index_t> w_idx {0}; ///< write index
-    private: padding<decltype(w_idx)> ___;
+    public : std::atomic<index_t> w_idx {0}; ///< write index
+    private: padding<decltype(w_idx)> ___1;
+    public : std::atomic<index_t> w_beg {0}; ///< write begin index
+    private: padding<decltype(w_beg)> ___2;
   };
 
   template <typename T, typename H, typename C, typename U, 
@@ -298,19 +300,18 @@ struct producer<trans::broadcast, relation::single> {
             is_convertible<H, header_impl> = true>
   static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
     auto w_idx = hdr.w_idx.load(std::memory_order_acquire);
+    auto w_beg = hdr.w_beg.load(std::memory_order_relaxed);
     auto w_cur = trunc_index(hdr, w_idx);
     auto &elem = elems[w_cur];
-    auto f_ct  = elem.get_flag();
-    // Verify index.
-    if ((f_ct != state::invalid_value) && 
-        (f_ct != state::dequeued)) {
-      return false; // full
+    // Move the queue head index.
+    if (w_beg + hdr.circ_size <= w_idx) {
+      hdr.w_beg.fetch_add(1, std::memory_order_release);
     }
     // Get a valid index and iterate backwards.
     hdr.w_idx.fetch_add(1, std::memory_order_release);
     // Set data & flag.
     elem.set_flag(w_idx | state::enqueue_mask);
-    elem.set_data(std::forward<U>(src));
+    elem.set_data(std::forward<U>(src));  // Here should not be interrupted.
     elem.set_flag(w_idx | state::commit_mask);
     return true;
   }
@@ -335,32 +336,36 @@ struct consumer<trans::broadcast, relation::multi> {
             is_convertible<C, context_impl> = true,
             std::enable_if_t<std::is_nothrow_copy_assignable<U>::value, bool> = true>
   static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, C &ctx, U &des) noexcept {
-    auto r_idx = ctx.r_idx;
-    auto w_idx = static_cast<index_t>(hdr.w_idx.load(std::memory_order_relaxed));
-    auto r_cur = trunc_index(hdr, r_idx);
-    auto const &elem = elems[r_cur];
+    auto w_idx = hdr.w_idx.load(std::memory_order_relaxed);
     // Verify index.
-    if ((ctx.w_lst != state::invalid_value) &&
-        (ctx.w_lst + hdr.circ_size > w_idx)) {
+    if (ctx.w_lst == w_idx) {
       return false; // not ready
     }
+    // Obtain the queue head index if we need.
+    auto w_beg = hdr.w_beg.load(std::memory_order_relaxed);
+    if ((ctx.r_idx <  w_beg) || 
+        (ctx.r_idx >= w_beg + hdr.circ_size)) {
+      ctx.r_idx = w_beg;
+    }
+    auto r_cur = trunc_index(hdr, ctx.r_idx);
+    auto &elem = elems[r_cur];
     auto f_ct = elem.get_flag();
     if (f_ct == state::invalid_value) {
       return false; // empty
     }
     // Try getting data.
     for (;;) {
-      if (f_ct & state::enqueue_mask == state::enqueue_mask) {
+      if ((f_ct & state::enqueue_mask) == state::enqueue_mask) {
         return false; // unreadable
       }
       des = LIBCONCUR::get(elem);
       // Correct data can be obtained only if 
       // the elem data is not modified during the getting process.
-      if (elem.cas_flag(f_ct, state::dequeued)) break;
+      if (elem.cas_flag(f_ct, f_ct)) break;
     }
+    ctx.w_lst = (f_ct & ~state::enqueue_mask) + 1;
     // Get a valid index and iterate backwards.
     ctx.r_idx += 1;
-    ctx.w_lst = w_idx;
     return true;
   }
 };
@@ -393,6 +398,10 @@ struct prod_cons : producer<TransModT, ProdModT>
       return (circ_size > 1) && ((circ_size & (circ_size - 1)) == 0);
     }
   };
+
+  /// \brief Mixing producer and consumer context definitions.
+  struct context : traits<producer<TransModT, ProdModT>>::context
+                 , traits<consumer<TransModT, ConsModT>>::context {};
 };
 
 LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/element.h b/include/libconcur/element.h
index 8dd3f398..ba08690d 100644
--- a/include/libconcur/element.h
+++ b/include/libconcur/element.h
@@ -26,11 +26,8 @@ using flag_t = std::uint64_t;
 
 enum : flag_t {
   invalid_value = ~flag_t(0),
-  committed     = ~flag_t(1),
-  dequeued      = ~flag_t(2),
-
   enqueue_mask  = invalid_value << 32,
-  commit_mask   = committed << 32,
+  commit_mask   = ~flag_t(1) << 32,
 };
 
 } // namespace state
diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index 0f2d1535..80c6210d 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -91,7 +91,7 @@ TEST(concurrent, trunc_index) {
 namespace {
 
 template <typename PC>
-void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
+void test_unicast(std::size_t np, std::size_t nc, std::size_t k) {
   LIBIMP_LOG_();
   log.info("\n\tStart with: ", imp::nameof<PC>(), ", ", np, " producers, ", nc, " consumers...");
 
@@ -100,13 +100,13 @@ void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
   concur::element<std::uint64_t> circ[32] {};
   PC pc;
   typename concur::traits<PC>::header hdr {imp::make_span(circ)};
-  typename concur::traits<PC>::context ctx {};
   ASSERT_TRUE(hdr.valid());
 
   std::atomic<std::uint64_t> sum {0};
   std::atomic<std::size_t> running {np};
 
   auto prod_call = [&](std::size_t n) {
+    typename concur::traits<PC>::context ctx {};
     for (std::uint32_t i = 1; i <= loop_size; ++i) {
       std::this_thread::yield();
       while (!pc.enqueue(imp::make_span(circ), hdr, ctx, i)) {
@@ -119,6 +119,7 @@ void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
     --running;
   };
   auto cons_call = [&] {
+    typename concur::traits<PC>::context ctx {};
     for (;;) {
       std::this_thread::yield();
       std::uint64_t i;
@@ -143,23 +144,88 @@ void test_concur(std::size_t np, std::size_t nc, std::size_t k) {
 
 } // namespace
 
-TEST(concurrent, unicast_prod_cons) {
+TEST(concurrent, unicast) {
   using namespace concur;
 
   /// @brief 1-1
-  test_concur<prod_cons<trans::unicast, relation::single, relation::single>>(1, 1, 1);
-  test_concur<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 1, 1);
-  test_concur<prod_cons<trans::unicast, relation::multi , relation::single>>(1, 1, 1);
-  test_concur<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 1, 1);
+  test_unicast<prod_cons<trans::unicast, relation::single, relation::single>>(1, 1, 1);
+  test_unicast<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 1, 1);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::single>>(1, 1, 1);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 1, 1);
 
   /// @brief 8-1
-  test_concur<prod_cons<trans::unicast, relation::multi , relation::single>>(8, 1, 1);
-  test_concur<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 1, 1);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::single>>(8, 1, 1);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 1, 1);
 
   /// @brief 1-8
-  test_concur<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 8, 1);
-  test_concur<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 8, 1);
+  test_unicast<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 8, 1);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 8, 1);
 
   /// @brief 8-8
-  test_concur<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 8, 1);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 8, 1);
+}
+
+namespace {
+
+template <typename PC>
+void test_broadcast(std::size_t np, std::size_t nc, std::size_t k) {
+  LIBIMP_LOG_();
+
+  concur::element<std::uint64_t> circ[32] {};
+  PC pc;
+  typename concur::traits<PC>::header hdr {imp::make_span(circ)};
+  ASSERT_TRUE(hdr.valid());
+
+  auto push_one = [&, ctx = typename concur::traits<PC>::context{}](std::uint32_t i) mutable {
+    return pc.enqueue(imp::make_span(circ), hdr, ctx, i);
+  };
+  auto pop_one = [&, ctx = typename concur::traits<PC>::context{}]() mutable {
+    std::uint64_t i;
+    if (pc.dequeue(imp::make_span(circ), hdr, ctx, i)) {
+      return i;
+    }
+    return (std::uint64_t)-1;
+  };
+  auto pop_one_2 = pop_one;
+
+  // empty queue pop
+  ASSERT_EQ(pop_one(), (std::uint64_t)-1);
+
+  // test one push & pop
+  for (int i = 0; i < 32; ++i) {
+    ASSERT_TRUE(push_one(i));
+    ASSERT_EQ(pop_one(), i);
+  }
+  for (int i = 0; i < 100; ++i) {
+    ASSERT_TRUE(push_one(i));
+    ASSERT_EQ(pop_one(), i);
+  }
+  ASSERT_EQ(pop_one(), (std::uint64_t)-1);
+
+  // test loop push & pop
+  for (int i = 0; i < 10; ++i) ASSERT_TRUE(push_one(i));
+  for (int i = 0; i < 10; ++i) ASSERT_EQ(pop_one(), i);
+  ASSERT_EQ(pop_one(), (std::uint64_t)-1);
+
+  // other loop pop
+  for (int i = 0; i < 32; ++i) ASSERT_TRUE(push_one(i));
+  for (int i = 0; i < 32; ++i) ASSERT_EQ(pop_one_2(), i);
+  ASSERT_EQ(pop_one_2(), (std::uint64_t)-1);
+
+  // overwrite
+  ASSERT_TRUE(push_one(123));
+  for (int i = 1; i < 32; ++i) {
+    ASSERT_EQ(pop_one(), i);
+  }
+  ASSERT_EQ(pop_one(), 123);
+  ASSERT_EQ(pop_one(), (std::uint64_t)-1);
+}
+
+} // namespace
+
+TEST(concurrent, broadcast) {
+  using namespace concur;
+
+  /// @brief 1-1
+  test_broadcast<prod_cons<trans::broadcast, relation::single, relation::multi>>(1, 1, 1);
 }
\ No newline at end of file

From 5578f48595b1b4800977b6af2db91b28d9736c15 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 15 Apr 2023 20:23:05 +0800
Subject: [PATCH 161/272] upd: improving the broadcasting ut.

---
 test/concur/test_concur_concurrent.cpp | 157 +++++++++++++++++--------
 1 file changed, 111 insertions(+), 46 deletions(-)

diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index 80c6210d..91f16b7b 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -122,12 +122,12 @@ void test_unicast(std::size_t np, std::size_t nc, std::size_t k) {
     typename concur::traits<PC>::context ctx {};
     for (;;) {
       std::this_thread::yield();
-      std::uint64_t i;
-      while (!pc.dequeue(imp::make_span(circ), hdr, ctx, i)) {
+      std::uint64_t v;
+      while (!pc.dequeue(imp::make_span(circ), hdr, ctx, v)) {
         if (running == 0) return;
         std::this_thread::yield();
       }
-      sum += i;
+      sum += v;
     }
   };
 
@@ -170,55 +170,120 @@ namespace {
 template <typename PC>
 void test_broadcast(std::size_t np, std::size_t nc, std::size_t k) {
   LIBIMP_LOG_();
+  {
+    concur::element<std::uint64_t> circ[32] {};
+    PC pc;
+    typename concur::traits<PC>::header hdr {imp::make_span(circ)};
+    ASSERT_TRUE(hdr.valid());
+
+    auto push_one = [&, ctx = typename concur::traits<PC>::context{}](std::uint32_t i) mutable {
+      return pc.enqueue(imp::make_span(circ), hdr, ctx, i);
+    };
+    auto pop_one = [&, ctx = typename concur::traits<PC>::context{}]() mutable {
+      std::uint64_t i;
+      if (pc.dequeue(imp::make_span(circ), hdr, ctx, i)) {
+        return i;
+      }
+      return (std::uint64_t)-1;
+    };
+    auto pop_one_2 = pop_one;
 
-  concur::element<std::uint64_t> circ[32] {};
-  PC pc;
-  typename concur::traits<PC>::header hdr {imp::make_span(circ)};
-  ASSERT_TRUE(hdr.valid());
+    // empty queue pop
+    ASSERT_EQ(pop_one(), (std::uint64_t)-1);
 
-  auto push_one = [&, ctx = typename concur::traits<PC>::context{}](std::uint32_t i) mutable {
-    return pc.enqueue(imp::make_span(circ), hdr, ctx, i);
-  };
-  auto pop_one = [&, ctx = typename concur::traits<PC>::context{}]() mutable {
-    std::uint64_t i;
-    if (pc.dequeue(imp::make_span(circ), hdr, ctx, i)) {
-      return i;
+    // test one push & pop
+    for (int i = 0; i < 32; ++i) {
+      ASSERT_TRUE(push_one(i));
+      ASSERT_EQ(pop_one(), i);
     }
-    return (std::uint64_t)-1;
-  };
-  auto pop_one_2 = pop_one;
+    for (int i = 0; i < 100; ++i) {
+      ASSERT_TRUE(push_one(i));
+      ASSERT_EQ(pop_one(), i);
+    }
+    ASSERT_EQ(pop_one(), (std::uint64_t)-1);
+
+    // test loop push & pop
+    for (int i = 0; i < 10; ++i) ASSERT_TRUE(push_one(i));
+    for (int i = 0; i < 10; ++i) ASSERT_EQ(pop_one(), i);
+    ASSERT_EQ(pop_one(), (std::uint64_t)-1);
+
+    // other loop pop
+    for (int i = 0; i < 32; ++i) ASSERT_TRUE(push_one(i));
+    for (int i = 0; i < 32; ++i) ASSERT_EQ(pop_one_2(), i);
+    ASSERT_EQ(pop_one_2(), (std::uint64_t)-1);
+
+    // overwrite
+    ASSERT_TRUE(push_one(123));
+    for (int i = 1; i < 32; ++i) {
+      ASSERT_EQ(pop_one(), i);
+    }
+    ASSERT_EQ(pop_one(), 123);
+    ASSERT_EQ(pop_one(), (std::uint64_t)-1);
+  }
 
-  // empty queue pop
-  ASSERT_EQ(pop_one(), (std::uint64_t)-1);
+  log.info("\n\tStart with: ", imp::nameof<PC>(), ", ", np, " producers, ", nc, " consumers...");
+  {
+    struct Data {
+      std::uint64_t n;
+      std::uint64_t i;
+    };
+    concur::element<Data> circ[32] {};
+    PC pc;
+    typename concur::traits<PC>::header hdr {imp::make_span(circ)};
+    ASSERT_TRUE(hdr.valid());
 
-  // test one push & pop
-  for (int i = 0; i < 32; ++i) {
-    ASSERT_TRUE(push_one(i));
-    ASSERT_EQ(pop_one(), i);
-  }
-  for (int i = 0; i < 100; ++i) {
-    ASSERT_TRUE(push_one(i));
-    ASSERT_EQ(pop_one(), i);
-  }
-  ASSERT_EQ(pop_one(), (std::uint64_t)-1);
-
-  // test loop push & pop
-  for (int i = 0; i < 10; ++i) ASSERT_TRUE(push_one(i));
-  for (int i = 0; i < 10; ++i) ASSERT_EQ(pop_one(), i);
-  ASSERT_EQ(pop_one(), (std::uint64_t)-1);
-
-  // other loop pop
-  for (int i = 0; i < 32; ++i) ASSERT_TRUE(push_one(i));
-  for (int i = 0; i < 32; ++i) ASSERT_EQ(pop_one_2(), i);
-  ASSERT_EQ(pop_one_2(), (std::uint64_t)-1);
-
-  // overwrite
-  ASSERT_TRUE(push_one(123));
-  for (int i = 1; i < 32; ++i) {
-    ASSERT_EQ(pop_one(), i);
+    constexpr static std::uint32_t loop_size = 100'0000;
+
+    std::atomic<std::uint64_t> sum {0};
+    std::atomic<std::size_t> running {np};
+    std::array<std::atomic<std::size_t>, 64> counters {};
+
+    auto prod_call = [&](std::size_t n) {
+      typename concur::traits<PC>::context ctx {};
+      for (std::uint32_t i = 1; i <= loop_size; ++i) {
+        std::this_thread::yield();
+        counters[n] = 0;
+        do {
+          ASSERT_TRUE(pc.enqueue(imp::make_span(circ), hdr, ctx, Data{n, i}));
+          std::this_thread::yield();
+          // We need to wait for the consumer to consume the data.
+        } while (counters[n] < nc);
+        if (i % (loop_size / 10) == 0) {
+          log.info("[", n, "] put count: ", i);
+        }
+      }
+      --running;
+    };
+    auto cons_call = [&] {
+      typename concur::traits<PC>::context ctx {};
+      std::array<std::uint64_t, 64> last_i {};
+      for (;;) {
+        std::this_thread::yield();
+        Data v;
+        while (!pc.dequeue(imp::make_span(circ), hdr, ctx, v)) {
+          if (running == 0) return;
+          std::this_thread::yield();
+        }
+        // The v.i variable always increases.
+        if (last_i[v.n] >= v.i) {
+          continue;
+        }
+        last_i[v.n] = v.i;
+        sum += v.i;
+        ++counters[v.n];
+      }
+    };
+
+    std::vector<std::thread> prods(np);
+    for (std::size_t n = 0; n < np; ++n) prods[n] = std::thread(prod_call, n);
+    std::vector<std::thread> conss(nc);
+    for (auto &c : conss) c = std::thread(cons_call);
+
+    for (auto &p : prods) p.join();
+    for (auto &c : conss) c.join();
+
+    EXPECT_EQ(sum, k * np * (loop_size * std::uint64_t(loop_size + 1)) / 2);
   }
-  ASSERT_EQ(pop_one(), 123);
-  ASSERT_EQ(pop_one(), (std::uint64_t)-1);
 }
 
 } // namespace

From a7b8af7fa8364e83a1a95817447d23cff652290d Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 16 Apr 2023 15:40:46 +0800
Subject: [PATCH 162/272] add: [concur] producer<trans::broadcast,
 relation::multi>

---
 include/libconcur/concurrent.h         | 82 +++++++++++++++++++++++---
 test/concur/test_concur_concurrent.cpp | 76 +++++++++++++++---------
 2 files changed, 121 insertions(+), 37 deletions(-)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index 12058bf6..63719a62 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -9,7 +9,9 @@
 #include <type_traits>
 #include <atomic>
 #include <array>
+#include <tuple>
 #include <cstdint>
+#include <climits>
 
 #include "libimp/span.h"
 #include "libimp/generic.h"
@@ -110,7 +112,7 @@ class broadcast {};
 
 /// \brief Determines whether type T can be implicitly converted to type U.
 template <typename T, typename U>
-using is_convertible = std::enable_if_t<std::is_convertible<T *, U *>::value, bool>;
+using is_convertible = typename std::enable_if<std::is_convertible<T *, U *>::value, bool>::type;
 
 /// \brief Check whether the elems header type is valid.
 template <typename T>
@@ -289,10 +291,15 @@ template <>
 struct producer<trans::broadcast, relation::single> {
 
   struct header_impl {
-    public : std::atomic<index_t> w_idx {0}; ///< write index
-    private: padding<decltype(w_idx)> ___1;
-    public : std::atomic<index_t> w_beg {0}; ///< write begin index
-    private: padding<decltype(w_beg)> ___2;
+    std::atomic<index_t> w_idx {0}; ///< write index
+    std::atomic<index_t> w_beg {0}; ///< write begin index
+    private: padding<std::tuple<decltype(w_idx), decltype(w_beg)>> ___;
+
+  public:
+    void get(index_t &idx, index_t &beg) const noexcept {
+      idx = w_idx.load(std::memory_order_relaxed);
+      beg = w_beg.load(std::memory_order_relaxed);
+    }
   };
 
   template <typename T, typename H, typename C, typename U, 
@@ -319,7 +326,66 @@ struct producer<trans::broadcast, relation::single> {
 
 /// \brief Multi-write producer model implementation.
 template <>
-struct producer<trans::broadcast, relation::multi> {};
+struct producer<trans::broadcast, relation::multi> {
+
+  struct header_impl {
+    std::atomic<state::flag_t> w_flags {0}; ///< write flags, combined current and starting index.
+    private: padding<decltype(w_flags)> ___;
+
+  public:
+    void get(index_t &idx, index_t &beg) const noexcept {
+      auto w_flags = this->w_flags.load(std::memory_order_relaxed);
+      idx = get_index(w_flags);
+      beg = get_begin(w_flags);
+    }
+  };
+
+  template <typename T, typename H, typename C, typename U, 
+            is_elems_header<H> = true,
+            is_convertible<H, header_impl> = true>
+  static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
+    auto w_flags = hdr.w_flags.load(std::memory_order_acquire);
+    index_t w_idx;
+    for (;;) {
+      w_idx = get_index(w_flags);
+      auto w_beg = get_begin(w_flags);
+      // Move the queue head index.
+      if (w_beg + hdr.circ_size <= w_idx) {
+        w_beg += 1;
+      }
+      // Update flags.
+      auto n_flags = make_flags(w_idx + 1/*iterate backwards*/, w_beg);
+      if (hdr.w_flags.compare_exchange_weak(w_flags, n_flags, std::memory_order_acq_rel)) {
+        break;
+      }
+    }
+    // Get element.
+    auto w_cur = trunc_index(hdr, w_idx);
+    auto &elem = elems[w_cur];
+    // Set data & flag.
+    elem.set_flag(w_idx | state::enqueue_mask);
+    elem.set_data(std::forward<U>(src));  // Here should not be interrupted.
+    elem.set_flag(w_idx | state::commit_mask);
+    return true;
+  }
+
+private:
+  friend struct producer::header_impl;
+
+  constexpr static index_t get_index(state::flag_t flags) noexcept {
+    return index_t(flags);
+  }
+
+  constexpr static index_t get_begin(state::flag_t flags) noexcept {
+    constexpr auto index_bits = sizeof(index_t) * CHAR_BIT;
+    return index_t(flags >> index_bits);
+  }
+
+  constexpr static state::flag_t make_flags(index_t idx, index_t beg) noexcept {
+    constexpr auto index_bits = sizeof(index_t) * CHAR_BIT;
+    return state::flag_t(idx) | (state::flag_t(beg) << index_bits);
+  }
+};
 
 /// \brief Multi-read consumer model implementation.
 /// Single-read consumer model is not required.
@@ -336,13 +402,13 @@ struct consumer<trans::broadcast, relation::multi> {
             is_convertible<C, context_impl> = true,
             std::enable_if_t<std::is_nothrow_copy_assignable<U>::value, bool> = true>
   static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, C &ctx, U &des) noexcept {
-    auto w_idx = hdr.w_idx.load(std::memory_order_relaxed);
+    index_t w_idx, w_beg;
+    hdr.get(w_idx, w_beg);
     // Verify index.
     if (ctx.w_lst == w_idx) {
       return false; // not ready
     }
     // Obtain the queue head index if we need.
-    auto w_beg = hdr.w_beg.load(std::memory_order_relaxed);
     if ((ctx.r_idx <  w_beg) || 
         (ctx.r_idx >= w_beg + hdr.circ_size)) {
       ctx.r_idx = w_beg;
diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index 91f16b7b..8c919b77 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -31,7 +31,7 @@ TEST(concurrent, trunc_index) {
     }
   };
 
-  /// @brief circ-size = 0
+  /// \brief circ-size = 0
   EXPECT_EQ(concur::trunc_index(header{0}, 0), 0);
   EXPECT_EQ(concur::trunc_index(header{0}, 1), 0);
   EXPECT_EQ(concur::trunc_index(header{0}, 2), 0);
@@ -39,7 +39,7 @@ TEST(concurrent, trunc_index) {
   EXPECT_EQ(concur::trunc_index(header{0}, 111), 0);
   EXPECT_EQ(concur::trunc_index(header{0}, -1), 0);
 
-  /// @brief circ-size = 1
+  /// \brief circ-size = 1
   EXPECT_EQ(concur::trunc_index(header{1}, 0), 0);
   EXPECT_EQ(concur::trunc_index(header{1}, 1), 0);
   EXPECT_EQ(concur::trunc_index(header{1}, 2), 0);
@@ -47,7 +47,7 @@ TEST(concurrent, trunc_index) {
   EXPECT_EQ(concur::trunc_index(header{1}, 111), 0);
   EXPECT_EQ(concur::trunc_index(header{1}, -1), 0);
 
-  /// @brief circ-size = 2
+  /// \brief circ-size = 2
   EXPECT_EQ(concur::trunc_index(header{2}, 0), 0);
   EXPECT_EQ(concur::trunc_index(header{2}, 1), 1);
   EXPECT_EQ(concur::trunc_index(header{2}, 2), 0);
@@ -55,7 +55,7 @@ TEST(concurrent, trunc_index) {
   EXPECT_EQ(concur::trunc_index(header{2}, 111), 1);
   EXPECT_EQ(concur::trunc_index(header{2}, -1), 1);
 
-  /// @brief circ-size = 10
+  /// \brief circ-size = 10
   EXPECT_EQ(concur::trunc_index(header{10}, 0), 0);
   EXPECT_EQ(concur::trunc_index(header{10}, 1), 0);
   EXPECT_EQ(concur::trunc_index(header{10}, 2), 0);
@@ -63,7 +63,7 @@ TEST(concurrent, trunc_index) {
   EXPECT_EQ(concur::trunc_index(header{10}, 111), 0);
   EXPECT_EQ(concur::trunc_index(header{10}, -1), 0);
 
-  /// @brief circ-size = 16
+  /// \brief circ-size = 16
   EXPECT_EQ(concur::trunc_index(header{16}, 0), 0);
   EXPECT_EQ(concur::trunc_index(header{16}, 1), 1);
   EXPECT_EQ(concur::trunc_index(header{16}, 2), 2);
@@ -71,7 +71,7 @@ TEST(concurrent, trunc_index) {
   EXPECT_EQ(concur::trunc_index(header{16}, 111), 15);
   EXPECT_EQ(concur::trunc_index(header{16}, -1), 15);
 
-  /// @brief circ-size = (index_t)-1
+  /// \brief circ-size = (index_t)-1
   EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 0), 0);
   EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 1), 0);
   EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 2), 0);
@@ -79,7 +79,7 @@ TEST(concurrent, trunc_index) {
   EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 111), 0);
   EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, -1), 0);
 
-  /// @brief circ-size = 2147483648 (2^31)
+  /// \brief circ-size = 2147483648 (2^31)
   EXPECT_EQ(concur::trunc_index(header{2147483648u}, 0), 0);
   EXPECT_EQ(concur::trunc_index(header{2147483648u}, 1), 1);
   EXPECT_EQ(concur::trunc_index(header{2147483648u}, 2), 2);
@@ -91,7 +91,7 @@ TEST(concurrent, trunc_index) {
 namespace {
 
 template <typename PC>
-void test_unicast(std::size_t np, std::size_t nc, std::size_t k) {
+void test_unicast(std::size_t np, std::size_t nc) {
   LIBIMP_LOG_();
   log.info("\n\tStart with: ", imp::nameof<PC>(), ", ", np, " producers, ", nc, " consumers...");
 
@@ -139,7 +139,7 @@ void test_unicast(std::size_t np, std::size_t nc, std::size_t k) {
   for (auto &p : prods) p.join();
   for (auto &c : conss) c.join();
 
-  EXPECT_EQ(sum, k * np * (loop_size * std::uint64_t(loop_size + 1)) / 2);
+  EXPECT_EQ(sum, np * (loop_size * std::uint64_t(loop_size + 1)) / 2);
 }
 
 } // namespace
@@ -147,28 +147,28 @@ void test_unicast(std::size_t np, std::size_t nc, std::size_t k) {
 TEST(concurrent, unicast) {
   using namespace concur;
 
-  /// @brief 1-1
-  test_unicast<prod_cons<trans::unicast, relation::single, relation::single>>(1, 1, 1);
-  test_unicast<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 1, 1);
-  test_unicast<prod_cons<trans::unicast, relation::multi , relation::single>>(1, 1, 1);
-  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 1, 1);
+  /// \brief 1-1
+  test_unicast<prod_cons<trans::unicast, relation::single, relation::single>>(1, 1);
+  test_unicast<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 1);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::single>>(1, 1);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 1);
 
-  /// @brief 8-1
-  test_unicast<prod_cons<trans::unicast, relation::multi , relation::single>>(8, 1, 1);
-  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 1, 1);
+  /// \brief 8-1
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::single>>(8, 1);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 1);
 
-  /// @brief 1-8
-  test_unicast<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 8, 1);
-  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 8, 1);
+  /// \brief 1-8
+  test_unicast<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 8);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 8);
 
-  /// @brief 8-8
-  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 8, 1);
+  /// \brief 8-8
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 8);
 }
 
 namespace {
 
 template <typename PC>
-void test_broadcast(std::size_t np, std::size_t nc, std::size_t k) {
+void test_broadcast(std::size_t np, std::size_t nc) {
   LIBIMP_LOG_();
   {
     concur::element<std::uint64_t> circ[32] {};
@@ -243,11 +243,18 @@ void test_broadcast(std::size_t np, std::size_t nc, std::size_t k) {
       for (std::uint32_t i = 1; i <= loop_size; ++i) {
         std::this_thread::yield();
         counters[n] = 0;
-        do {
+        for (std::uint32_t k = 1;; ++k) {
           ASSERT_TRUE(pc.enqueue(imp::make_span(circ), hdr, ctx, Data{n, i}));
-          std::this_thread::yield();
           // We need to wait for the consumer to consume the data.
-        } while (counters[n] < nc);
+          if (counters[n] >= nc) {
+            break;
+          }
+          std::this_thread::yield();
+          if (k % (loop_size / 10) == 0) {
+            log.info("[", n, "] put count: ", i, ", retry: ", k, ", counters: ", counters[n]);
+            std::this_thread::sleep_for(std::chrono::milliseconds(1));
+          }
+        }
         if (i % (loop_size / 10) == 0) {
           log.info("[", n, "] put count: ", i);
         }
@@ -282,7 +289,7 @@ void test_broadcast(std::size_t np, std::size_t nc, std::size_t k) {
     for (auto &p : prods) p.join();
     for (auto &c : conss) c.join();
 
-    EXPECT_EQ(sum, k * np * (loop_size * std::uint64_t(loop_size + 1)) / 2);
+    EXPECT_EQ(sum, np * nc * (loop_size * std::uint64_t(loop_size + 1)) / 2);
   }
 }
 
@@ -291,6 +298,17 @@ void test_broadcast(std::size_t np, std::size_t nc, std::size_t k) {
 TEST(concurrent, broadcast) {
   using namespace concur;
 
-  /// @brief 1-1
-  test_broadcast<prod_cons<trans::broadcast, relation::single, relation::multi>>(1, 1, 1);
+  /// \brief 1-1
+  test_broadcast<prod_cons<trans::broadcast, relation::single, relation::multi>>(1, 1);
+  test_broadcast<prod_cons<trans::broadcast, relation::multi , relation::multi>>(1, 1);
+
+  /// \brief 8-1
+  test_broadcast<prod_cons<trans::broadcast, relation::multi , relation::multi>>(8, 1);
+
+  /// \brief 1-8
+  test_broadcast<prod_cons<trans::broadcast, relation::single, relation::multi>>(1, 8);
+  test_broadcast<prod_cons<trans::broadcast, relation::multi , relation::multi>>(1, 8);
+
+  /// \brief 8-8
+  test_broadcast<prod_cons<trans::broadcast, relation::multi , relation::multi>>(8, 8);
 }
\ No newline at end of file

From 4e05befbe9dd16b871e6fbed477b2ec4704e2178 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 16 Apr 2023 16:10:07 +0800
Subject: [PATCH 163/272] fix: MSVC error C2672

---
 include/libconcur/concurrent.h         | 59 ++++++++++++++------------
 test/concur/test_concur_concurrent.cpp |  8 ++--
 2 files changed, 36 insertions(+), 31 deletions(-)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index 63719a62..aaea18a7 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -50,8 +50,8 @@ template <typename T>
 struct has_context_impl<T, ::LIBIMP::void_t<typename T::context_impl>>
   : std::true_type {};
 
-template <typename T, bool = has_header<T>{}
-                    , bool = has_header_impl<T>{}>
+template <typename T, bool = has_header<T>::value
+                    , bool = has_header_impl<T>::value>
 struct traits_header {
   struct header {};
 };
@@ -66,8 +66,8 @@ struct traits_header<T, false, true> {
   using header = typename T::header_impl;
 };
 
-template <typename T, bool = has_context<T>{}
-                    , bool = has_context_impl<T>{}>
+template <typename T, bool = has_context<T>::value
+                    , bool = has_context_impl<T>::value>
 struct traits_context {
   struct context {};
 };
@@ -112,13 +112,20 @@ class broadcast {};
 
 /// \brief Determines whether type T can be implicitly converted to type U.
 template <typename T, typename U>
-using is_convertible = typename std::enable_if<std::is_convertible<T *, U *>::value, bool>::type;
+using convertible = std::enable_if_t<std::is_convertible<T *, U *>::value, bool>;
 
 /// \brief Check whether the elems header type is valid.
+template <typename T, typename = void>
+struct is_elems_header : std::false_type {};
+template <typename T>
+struct is_elems_header<T, ::LIBIMP::void_t<
+    decltype(std::declval<index_t>() % std::declval<T>().circ_size), 
+    std::enable_if_t<std::is_convertible<decltype(std::declval<T>().valid()), bool>::value>>>
+  : std::true_type {};
+
+/// \brief Utility template for verifying elems header type.
 template <typename T>
-using is_elems_header = decltype(
-  std::declval<index_t>() % std::declval<T>().circ_size, 
-  std::enable_if_t<std::is_convertible<decltype(std::declval<T>().valid()), bool>::value, bool>{});
+using verify_elems_header = std::enable_if_t<is_elems_header<T>::value, bool>;
 
 /**
  * \brief Calculate the corresponding queue position modulo the index value.
@@ -128,7 +135,7 @@ using is_elems_header = decltype(
  * \param idx a elems array index
  * \return index_t - a corresponding queue position
  */
-template <typename H, is_elems_header<H> = true>
+template <typename H, verify_elems_header<H> = true>
 constexpr index_t trunc_index(H const &hdr, index_t idx) noexcept {
   // `circ_size == 2^N` => `idx & (circ_size - 1)`
   return hdr.valid() ? (idx % hdr.circ_size) : 0;
@@ -160,8 +167,8 @@ struct producer<trans::unicast, relation::single> {
   };
 
   template <typename T, typename H, typename C, typename U, 
-            is_elems_header<H> = true,
-            is_convertible<H, header_impl> = true>
+            verify_elems_header<H> = true,
+            convertible<H, header_impl> = true>
   static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
     auto w_idx = hdr.w_idx;
     auto w_cur = trunc_index(hdr, w_idx);
@@ -191,8 +198,8 @@ struct producer<trans::unicast, relation::multi> {
   };
 
   template <typename T, typename H, typename C, typename U, 
-            is_elems_header<H> = true,
-            is_convertible<H, header_impl> = true>
+            verify_elems_header<H> = true,
+            convertible<H, header_impl> = true>
   static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
     auto w_idx = hdr.w_idx.load(std::memory_order_acquire);
     for (;;) {
@@ -226,8 +233,8 @@ struct consumer<trans::unicast, relation::single> {
   };
 
   template <typename T, typename H, typename C, typename U, 
-            is_elems_header<H> = true,
-            is_convertible<H, header_impl> = true,
+            verify_elems_header<H> = true,
+            convertible<H, header_impl> = true,
             std::enable_if_t<std::is_nothrow_move_assignable<U>::value, bool> = true>
   static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &des) noexcept {
     auto r_idx = hdr.r_idx;
@@ -257,8 +264,8 @@ struct consumer<trans::unicast, relation::multi> {
   };
 
   template <typename T, typename H, typename C, typename U, 
-            is_elems_header<H> = true,
-            is_convertible<H, header_impl> = true,
+            verify_elems_header<H> = true,
+            convertible<H, header_impl> = true,
             std::enable_if_t<std::is_nothrow_move_assignable<U>::value, bool> = true>
   static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &des) noexcept {
     auto r_idx = hdr.r_idx.load(std::memory_order_acquire);
@@ -303,8 +310,8 @@ struct producer<trans::broadcast, relation::single> {
   };
 
   template <typename T, typename H, typename C, typename U, 
-            is_elems_header<H> = true,
-            is_convertible<H, header_impl> = true>
+            verify_elems_header<H> = true,
+            convertible<H, header_impl> = true>
   static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
     auto w_idx = hdr.w_idx.load(std::memory_order_acquire);
     auto w_beg = hdr.w_beg.load(std::memory_order_relaxed);
@@ -341,8 +348,8 @@ struct producer<trans::broadcast, relation::multi> {
   };
 
   template <typename T, typename H, typename C, typename U, 
-            is_elems_header<H> = true,
-            is_convertible<H, header_impl> = true>
+            verify_elems_header<H> = true,
+            convertible<H, header_impl> = true>
   static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
     auto w_flags = hdr.w_flags.load(std::memory_order_acquire);
     index_t w_idx;
@@ -377,13 +384,11 @@ struct producer<trans::broadcast, relation::multi> {
   }
 
   constexpr static index_t get_begin(state::flag_t flags) noexcept {
-    constexpr auto index_bits = sizeof(index_t) * CHAR_BIT;
-    return index_t(flags >> index_bits);
+    return index_t(flags >> (sizeof(index_t) * CHAR_BIT));
   }
 
   constexpr static state::flag_t make_flags(index_t idx, index_t beg) noexcept {
-    constexpr auto index_bits = sizeof(index_t) * CHAR_BIT;
-    return state::flag_t(idx) | (state::flag_t(beg) << index_bits);
+    return state::flag_t(idx) | (state::flag_t(beg) << (sizeof(index_t) * CHAR_BIT));
   }
 };
 
@@ -398,8 +403,8 @@ struct consumer<trans::broadcast, relation::multi> {
   };
 
   template <typename T, typename H, typename C, typename U, 
-            is_elems_header<H> = true,
-            is_convertible<C, context_impl> = true,
+            verify_elems_header<H> = true,
+            convertible<C, context_impl> = true,
             std::enable_if_t<std::is_nothrow_copy_assignable<U>::value, bool> = true>
   static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, C &ctx, U &des) noexcept {
     index_t w_idx, w_beg;
diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index 8c919b77..995560bb 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -232,7 +232,7 @@ void test_broadcast(std::size_t np, std::size_t nc) {
     typename concur::traits<PC>::header hdr {imp::make_span(circ)};
     ASSERT_TRUE(hdr.valid());
 
-    constexpr static std::uint32_t loop_size = 100'0000;
+    constexpr static std::uint32_t loop_size = 10'0000;
 
     std::atomic<std::uint64_t> sum {0};
     std::atomic<std::size_t> running {np};
@@ -272,12 +272,12 @@ void test_broadcast(std::size_t np, std::size_t nc) {
           std::this_thread::yield();
         }
         // The v.i variable always increases.
-        if (last_i[v.n] >= v.i) {
+        if (last_i[(std::size_t)v.n] >= v.i) {
           continue;
         }
-        last_i[v.n] = v.i;
+        last_i[(std::size_t)v.n] = v.i;
         sum += v.i;
-        ++counters[v.n];
+        ++counters[(std::size_t)v.n];
       }
     };
 

From 4e7688f1092b2a962c63f8370e516b52d203009f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 16 Apr 2023 20:45:05 +0800
Subject: [PATCH 164/272] upd: optimize ut

---
 test/concur/test_concur_concurrent.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index 995560bb..b521a274 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -227,7 +227,7 @@ void test_broadcast(std::size_t np, std::size_t nc) {
       std::uint64_t n;
       std::uint64_t i;
     };
-    concur::element<Data> circ[32] {};
+    concur::element<Data> circ[256] {};
     PC pc;
     typename concur::traits<PC>::header hdr {imp::make_span(circ)};
     ASSERT_TRUE(hdr.valid());
@@ -251,7 +251,7 @@ void test_broadcast(std::size_t np, std::size_t nc) {
           }
           std::this_thread::yield();
           if (k % (loop_size / 10) == 0) {
-            log.info("[", n, "] put count: ", i, ", retry: ", k, ", counters: ", counters[n]);
+            log.info("[", n, "] put count: ", i, ", retry: ", k, ", counter: ", counters[n]);
             std::this_thread::sleep_for(std::chrono::milliseconds(1));
           }
         }
@@ -272,7 +272,7 @@ void test_broadcast(std::size_t np, std::size_t nc) {
           std::this_thread::yield();
         }
         // The v.i variable always increases.
-        if (last_i[(std::size_t)v.n] >= v.i) {
+        if (last_i[(std::size_t)v.n] != (v.i - 1)) {
           continue;
         }
         last_i[(std::size_t)v.n] = v.i;

From 0b4f69266f61a952d6850a4bf3fa5ba153c51b9d Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Fri, 28 Apr 2023 13:25:29 +0800
Subject: [PATCH 165/272] add: [concur] queue (TBD)

---
 include/libconcur/bus.h          | 16 ++++++++
 include/libconcur/def.h          |  2 +
 include/libconcur/queue.h        | 65 +++++++++++++++++++++++++++++++-
 include/libpmr/allocator.h       |  6 +--
 include/libpmr/memory_resource.h |  6 +--
 test/concur/test_concur_bus.cpp  |  4 ++
 6 files changed, 92 insertions(+), 7 deletions(-)
 create mode 100644 include/libconcur/bus.h
 create mode 100644 test/concur/test_concur_bus.cpp

diff --git a/include/libconcur/bus.h b/include/libconcur/bus.h
new file mode 100644
index 00000000..5f68c649
--- /dev/null
+++ b/include/libconcur/bus.h
@@ -0,0 +1,16 @@
+/**
+ * \file libconcur/bus.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define concurrent data bus.
+ * \date 2023-04-17
+ */
+#pragma once
+
+#include "libconcur/def.h"
+#include "libconcur/concurrent.h"
+
+LIBCONCUR_NAMESPACE_BEG_
+
+
+
+LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/def.h b/include/libconcur/def.h
index 032f239e..3e8b49c2 100644
--- a/include/libconcur/def.h
+++ b/include/libconcur/def.h
@@ -29,6 +29,8 @@ enum : std::size_t {
 #else
     64,
 #endif
+
+  default_circle_buffer_size = 1024,
 };
 
 LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/queue.h b/include/libconcur/queue.h
index af17f7db..7aa20a1b 100644
--- a/include/libconcur/queue.h
+++ b/include/libconcur/queue.h
@@ -6,11 +6,74 @@
  */
 #pragma once
 
+#include <cstddef>
+
+#include "libimp/construct.h"
+#include "libimp/detect_plat.h"
+
+#include "libpmr/allocator.h"
+#include "libpmr/memory_resource.h"
+
 #include "libconcur/def.h"
-#include "libconcur/element.h"
+#include "libconcur/concurrent.h"
 
 LIBCONCUR_NAMESPACE_BEG_
 
+template <typename T, typename PRelationT, typename CRelationT>
+class queue {
+public:
+  using producer_relation_t = PRelationT;
+  using consumer_relation_t = CRelationT;
+  using model_type = prod_cons<trans::unicast, producer_relation_t, consumer_relation_t>;
+  using value_type = T;
+
+private:
+  struct data {
+    model_type model_;
+    typename concur::traits<model_type>::header header_;
+    element<value_type> elements_start_;
+
+    template <typename U>
+    data(U &&model) noexcept
+      : header_(std::forward<U>(model)) {}
+
+    /// \brief element<value_type> elements[0];
+    element<value_type> *elements() noexcept {
+      return &elements_start_;
+    }
+  };
+
+  data *init(index_t circ_size) noexcept {
+    if (!data_allocator_) {
+      return nullptr;
+    }
+    LIBIMP_TRY {
+      auto data_ptr = data_allocator_.allocate(sizeof(data) + (circ_size - 1) * sizeof(element<value_type>));
+      if (data_ptr == nullptr) {
+        return nullptr;
+      }
+      return ::LIBIMP::construct<data>(data_ptr, circ_size);
+    } LIBIMP_CATCH(...) {
+      return nullptr;
+    }
+  }
+
+  ::LIBPMR::allocator data_allocator_;
+  data *data_;
+  typename concur::traits<model_type>::context context_;
+
+public:
+  queue() = default;
+  queue(queue const &) = delete;
+  queue(queue &&) = delete;
+  queue &operator=(queue const &) = delete;
+  queue &operator=(queue &&) = delete;
 
+  template <typename MR, ::LIBPMR::verify_memory_resource<T> = true>
+  explicit queue(index_t circ_size = default_circle_buffer_size, 
+                 MR *memory_resource = ::LIBPMR::new_delete_resource::get()) noexcept
+    : data_allocator_(memory_resource)
+    , data_(init(circ_size)) {}
+};
 
 LIBCONCUR_NAMESPACE_END_
diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index da5de388..51a39558 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -47,7 +47,7 @@ class LIBIMP_EXPORT allocator {
     bool  valid() const noexcept override { return false; }
   };
 
-  template <typename MemRes, typename = void>
+  template <typename MemRes, typename = bool>
   class holder_memory_resource;
 
   /**
@@ -55,7 +55,7 @@ class LIBIMP_EXPORT allocator {
    * \tparam MR memory resource type
    */
   template <typename MR>
-  class holder_memory_resource<MR, is_memory_resource<MR>> : public holder_base {
+  class holder_memory_resource<MR, verify_memory_resource<MR>> : public holder_base {
     MR *p_mem_res_;
 
   public:
@@ -102,7 +102,7 @@ class LIBIMP_EXPORT allocator {
 
   /// \brief Constructs a allocator from a memory resource pointer
   /// The lifetime of the pointer must be longer than that of allocator.
-  template <typename T, typename = is_memory_resource<T>>
+  template <typename T, verify_memory_resource<T> = true>
   allocator(T *p_mr) : allocator() {
     if (p_mr == nullptr) return;
     ::LIBIMP::construct<holder_memory_resource<T>>(holder_.data(), p_mr);
diff --git a/include/libpmr/memory_resource.h b/include/libpmr/memory_resource.h
index 004e821e..523f6c2d 100644
--- a/include/libpmr/memory_resource.h
+++ b/include/libpmr/memory_resource.h
@@ -35,9 +35,9 @@ struct has_deallocate<T,
   > : std::true_type {};
 
 template <typename T>
-using is_memory_resource = 
-  typename std::enable_if<has_allocate  <T>::value && 
-                          has_deallocate<T>::value>::type;
+using verify_memory_resource = 
+  std::enable_if_t<has_allocate  <T>::value && 
+                   has_deallocate<T>::value, bool>;
 
 /**
  * \brief A memory resource that uses the 
diff --git a/test/concur/test_concur_bus.cpp b/test/concur/test_concur_bus.cpp
new file mode 100644
index 00000000..87776ec1
--- /dev/null
+++ b/test/concur/test_concur_bus.cpp
@@ -0,0 +1,4 @@
+
+#include "gtest/gtest.h"
+
+#include "libconcur/bus.h"

From 934bb317783caf28cfa8c33169936b382c2d84a3 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Fri, 28 Apr 2023 13:37:05 +0800
Subject: [PATCH 166/272] add: [concur] add push & pop for queue (TBD)

---
 include/libconcur/queue.h | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/include/libconcur/queue.h b/include/libconcur/queue.h
index 7aa20a1b..392c10c7 100644
--- a/include/libconcur/queue.h
+++ b/include/libconcur/queue.h
@@ -38,8 +38,8 @@ class queue {
       : header_(std::forward<U>(model)) {}
 
     /// \brief element<value_type> elements[0];
-    element<value_type> *elements() noexcept {
-      return &elements_start_;
+    ::LIBIMP::span<element<value_type>> elements() noexcept {
+      return {&elements_start_, header_.circ_size};
     }
   };
 
@@ -74,6 +74,29 @@ class queue {
                  MR *memory_resource = ::LIBPMR::new_delete_resource::get()) noexcept
     : data_allocator_(memory_resource)
     , data_(init(circ_size)) {}
+
+  template <typename MR, ::LIBPMR::verify_memory_resource<T> = true>
+  explicit queue(MR *memory_resource) noexcept
+    : queue(default_circle_buffer_size, memory_resource) {}
+
+  bool valid() const noexcept {
+    return data_ != nullptr;
+  }
+
+  explicit operator bool() const noexcept {
+    return valid();
+  }
+
+  template <typename U>
+  bool push(U &&value) noexcept {
+    if (!valid()) return false;
+    return data_->model_.enqueue(data_->elements(), data_->header_, context_, std::forward<U>(value));
+  }
+
+  bool pop(value_type &value) noexcept {
+    if (!valid()) return false;
+    return data_->model_.dequeue(data_->elements(), data_->header_, context_, value);
+  }
 };
 
 LIBCONCUR_NAMESPACE_END_

From 426b7c37684d0f98d82d9587e5f462ab73d9e8fc Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 20 May 2023 16:58:42 +0800
Subject: [PATCH 167/272] add: [concur] queue and simple ut

---
 include/libconcur/queue.h         | 87 ++++++++++++++++++++++++++-----
 include/libimp/aligned.h          | 62 ++++++++++++++++++++++
 include/libpmr/allocator.h        |  8 +--
 src/libpmr/allocator.cpp          |  4 +-
 test/concur/test_concur_queue.cpp | 58 +++++++++++++++++++++
 test/pmr/test_pmr_allocator.cpp   | 16 +++---
 6 files changed, 208 insertions(+), 27 deletions(-)
 create mode 100644 include/libimp/aligned.h

diff --git a/include/libconcur/queue.h b/include/libconcur/queue.h
index 392c10c7..25cc1ec8 100644
--- a/include/libconcur/queue.h
+++ b/include/libconcur/queue.h
@@ -6,10 +6,14 @@
  */
 #pragma once
 
+#include <atomic>
+#include <array>
 #include <cstddef>
+#include <cstdint>
 
 #include "libimp/construct.h"
 #include "libimp/detect_plat.h"
+#include "libimp/aligned.h"
 
 #include "libpmr/allocator.h"
 #include "libpmr/memory_resource.h"
@@ -19,27 +23,55 @@
 
 LIBCONCUR_NAMESPACE_BEG_
 
-template <typename T, typename PRelationT, typename CRelationT>
+template <typename T, typename PRelationT = relation::multi
+                    , typename CRelationT = relation::multi>
 class queue {
 public:
   using producer_relation_t = PRelationT;
   using consumer_relation_t = CRelationT;
   using model_type = prod_cons<trans::unicast, producer_relation_t, consumer_relation_t>;
   using value_type = T;
+  using size_type  = std::int64_t;
 
 private:
   struct data {
     model_type model_;
     typename concur::traits<model_type>::header header_;
-    element<value_type> elements_start_;
+    ::LIBIMP::aligned<element<value_type>> elements_start_;
 
     template <typename U>
     data(U &&model) noexcept
-      : header_(std::forward<U>(model)) {}
+      : header_(std::forward<U>(model)) {
+      auto elements = this->elements();
+      decltype(elements)::size_type i = 0;
+      LIBIMP_TRY {
+        for (; i < elements.size(); ++i) {
+          (void)::LIBIMP::construct<element<value_type>>(&elements[i]);
+        }
+      } LIBIMP_CATCH(...) {
+        for (decltype(i) k = 0; k < i; ++k) {
+          (void)::LIBIMP::destroy<element<value_type>>(&elements[k]);
+        }
+      }
+    }
+
+    ~data() noexcept {
+      for (auto &elem : this->elements()) {
+        (void)::LIBIMP::destroy<element<value_type>>(&elem);
+      }
+    }
+
+    static std::size_t size_of(index_t circ_size) noexcept {
+      return sizeof(struct data) + ( (circ_size - 1) * sizeof(element<value_type>) );
+    }
+
+    std::size_t byte_size() const noexcept {
+      return size_of(header_.circ_size);
+    }
 
     /// \brief element<value_type> elements[0];
     ::LIBIMP::span<element<value_type>> elements() noexcept {
-      return {&elements_start_, header_.circ_size};
+      return {elements_start_.ptr(), header_.circ_size};
     }
   };
 
@@ -48,7 +80,7 @@ class queue {
       return nullptr;
     }
     LIBIMP_TRY {
-      auto data_ptr = data_allocator_.allocate(sizeof(data) + (circ_size - 1) * sizeof(element<value_type>));
+      auto data_ptr = data_allocator_.alloc(data::size_of(circ_size));
       if (data_ptr == nullptr) {
         return nullptr;
       }
@@ -59,43 +91,72 @@ class queue {
   }
 
   ::LIBPMR::allocator data_allocator_;
+  std::atomic<size_type> size_;
   data *data_;
   typename concur::traits<model_type>::context context_;
 
 public:
-  queue() = default;
   queue(queue const &) = delete;
   queue(queue &&) = delete;
   queue &operator=(queue const &) = delete;
   queue &operator=(queue &&) = delete;
 
-  template <typename MR, ::LIBPMR::verify_memory_resource<T> = true>
-  explicit queue(index_t circ_size = default_circle_buffer_size, 
-                 MR *memory_resource = ::LIBPMR::new_delete_resource::get()) noexcept
+  ~queue() noexcept {
+    if (valid()) {
+      auto sz = data_->byte_size();
+      (void)::LIBIMP::destroy<data>(data_);
+      data_allocator_.dealloc(data_, sz);
+    }
+  }
+
+  template <typename MR, ::LIBPMR::verify_memory_resource<MR> = true>
+  explicit queue(index_t circ_size, MR *memory_resource) noexcept
     : data_allocator_(memory_resource)
     , data_(init(circ_size)) {}
 
-  template <typename MR, ::LIBPMR::verify_memory_resource<T> = true>
+  template <typename MR, ::LIBPMR::verify_memory_resource<MR> = true>
   explicit queue(MR *memory_resource) noexcept
     : queue(default_circle_buffer_size, memory_resource) {}
 
+  explicit queue(index_t circ_size) noexcept
+    : queue(circ_size, ::LIBPMR::new_delete_resource::get()) {}
+
+  queue() noexcept
+    : queue(default_circle_buffer_size) {}
+
   bool valid() const noexcept {
-    return data_ != nullptr;
+    return (data_ != nullptr) && data_allocator_.valid();
   }
 
   explicit operator bool() const noexcept {
     return valid();
   }
 
+  size_type approx_size() const noexcept {
+    return size_.load(std::memory_order_relaxed);
+  }
+
+  bool empty() const noexcept {
+    return !valid() || (approx_size() == 0);
+  }
+
   template <typename U>
   bool push(U &&value) noexcept {
     if (!valid()) return false;
-    return data_->model_.enqueue(data_->elements(), data_->header_, context_, std::forward<U>(value));
+    if (!data_->model_.enqueue(data_->elements(), data_->header_, context_, std::forward<U>(value))) {
+      return false;
+    }
+    size_.fetch_add(1, std::memory_order_relaxed);
+    return true;
   }
 
   bool pop(value_type &value) noexcept {
     if (!valid()) return false;
-    return data_->model_.dequeue(data_->elements(), data_->header_, context_, value);
+    if (!data_->model_.dequeue(data_->elements(), data_->header_, context_, value)) {
+      return false;
+    }
+    size_.fetch_sub(1, std::memory_order_relaxed);
+    return true;
   }
 };
 
diff --git a/include/libimp/aligned.h b/include/libimp/aligned.h
new file mode 100644
index 00000000..4514b4c2
--- /dev/null
+++ b/include/libimp/aligned.h
@@ -0,0 +1,62 @@
+/**
+ * \file libimp/aligned.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Defines the type suitable for use as uninitialized storage for types of given type.
+ * \date 2023-05-20
+ */
+#pragma once
+
+#include <array>
+
+#include "libimp/def.h"
+#include "libimp/byte.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \brief The type suitable for use as uninitialized storage for types of given type.
+ *        std::aligned_storage is deprecated in C++23, so we define our own.
+ * \tparam T The type to be aligned.
+ * \tparam AlignT The alignment of the type.
+ * \see https://en.cppreference.com/w/cpp/types/aligned_storage
+ *      https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1413r3.pdf
+ */
+template <typename T, std::size_t AlignT = alignof(T)>
+class aligned {
+  alignas(AlignT) std::array<::LIBIMP::byte, sizeof(T)> storage_;
+
+public:
+  /**
+   * \brief Returns a pointer to the aligned storage.
+   * \return A pointer to the aligned storage.
+   */
+  T *ptr() noexcept {
+    return reinterpret_cast<T *>(storage_.data());
+  }
+
+  /**
+   * \brief Returns a pointer to the aligned storage.
+   * \return A pointer to the aligned storage.
+   */
+  T const *ptr() const noexcept {
+    return reinterpret_cast<const T *>(storage_.data());
+  }
+
+  /**
+   * \brief Returns a reference to the aligned storage.
+   * \return A reference to the aligned storage.
+   */
+  T &ref() noexcept {
+    return *ptr();
+  }
+
+  /**
+   * \brief Returns a reference to the aligned storage.
+   * \return A reference to the aligned storage.
+   */
+  T const &ref() const noexcept {
+    return *ptr();
+  }
+};
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index 51a39558..fb61efe1 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -36,14 +36,14 @@ class LIBIMP_EXPORT allocator {
   public:
     virtual ~holder_base() noexcept = default;
     virtual void *alloc(std::size_t) = 0;
-    virtual void  free (void *, std::size_t) = 0;
+    virtual void  dealloc(void *, std::size_t) = 0;
     virtual bool  valid() const noexcept = 0;
   };
 
   class holder_null : public holder_base {
   public:
     void *alloc(std::size_t) override { return nullptr; }
-    void  free (void *, std::size_t) override {}
+    void  dealloc(void *, std::size_t) override {}
     bool  valid() const noexcept override { return false; }
   };
 
@@ -66,7 +66,7 @@ class LIBIMP_EXPORT allocator {
       return p_mem_res_->allocate(s);
     }
 
-    void free(void *p, std::size_t s) override {
+    void dealloc(void *p, std::size_t s) override {
       p_mem_res_->deallocate(p, s);
     }
   
@@ -114,7 +114,7 @@ class LIBIMP_EXPORT allocator {
 
   /// \brief Allocate/deallocate memory.
   void *alloc(std::size_t s);
-  void  free (void *p, std::size_t s);
+  void  dealloc(void *p, std::size_t s);
 };
 
 LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/allocator.cpp b/src/libpmr/allocator.cpp
index c83147e5..4760347d 100644
--- a/src/libpmr/allocator.cpp
+++ b/src/libpmr/allocator.cpp
@@ -50,9 +50,9 @@ void *allocator::alloc(std::size_t s) {
   return get_holder().alloc(s);
 }
 
-void allocator::free(void *p, std::size_t s) {
+void allocator::dealloc(void *p, std::size_t s) {
   if (!valid()) return;
-  get_holder().free(p, s);
+  get_holder().dealloc(p, s);
 }
 
 LIBPMR_NAMESPACE_END_
diff --git a/test/concur/test_concur_queue.cpp b/test/concur/test_concur_queue.cpp
index e05c1b1d..7444c15a 100644
--- a/test/concur/test_concur_queue.cpp
+++ b/test/concur/test_concur_queue.cpp
@@ -2,3 +2,61 @@
 #include "gtest/gtest.h"
 
 #include "libconcur/queue.h"
+
+using namespace concur;
+
+TEST(queue, construct) {
+  using queue_t = queue<int>;
+  queue_t q1;
+  EXPECT_TRUE(q1.valid());
+  EXPECT_TRUE(q1.empty());
+  EXPECT_EQ(q1.approx_size(), 0);
+}
+
+TEST(queue, push_pop) {
+  using queue_t = queue<int>;
+  queue_t q1;
+  EXPECT_TRUE(q1.valid());
+  EXPECT_TRUE(q1.empty());
+  EXPECT_EQ(q1.approx_size(), 0);
+
+  EXPECT_TRUE(q1.push(1));
+  EXPECT_FALSE(q1.empty());
+  EXPECT_EQ(q1.approx_size(), 1);
+
+  int value;
+  EXPECT_TRUE(q1.pop(value));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(q1.empty());
+  EXPECT_EQ(q1.approx_size(), 0);
+
+  int count = 0;
+  auto push = [&q1, &count](int i) {
+    EXPECT_TRUE(q1.push(i));
+    EXPECT_FALSE(q1.empty());
+    ++count;
+    EXPECT_EQ(q1.approx_size(), count);
+  };
+  auto pop = [&q1, &count](int i) {
+    int value;
+    EXPECT_TRUE(q1.pop(value));
+    EXPECT_EQ(value, i);
+    --count;
+    EXPECT_EQ(q1.approx_size(), count);
+  };
+
+  for (int i = 0; i < 1000; ++i) {
+    push(i);
+  }
+  for (int i = 0; i < 1000; ++i) {
+    pop(i);
+  }
+
+  for (int i = 0; i < default_circle_buffer_size; ++i) {
+    push(i);
+  }
+  EXPECT_FALSE(q1.push(65536));
+  for (int i = 0; i < default_circle_buffer_size; ++i) {
+    pop(i);
+  }
+}
\ No newline at end of file
diff --git a/test/pmr/test_pmr_allocator.cpp b/test/pmr/test_pmr_allocator.cpp
index 28609793..a1d2368a 100644
--- a/test/pmr/test_pmr_allocator.cpp
+++ b/test/pmr/test_pmr_allocator.cpp
@@ -20,7 +20,7 @@ TEST(allocator, construct_with_memory_resource) {
 
   auto p = alc.alloc(128);
   EXPECT_NE(p, nullptr);
-  EXPECT_NO_THROW(alc.free(p, 128));
+  EXPECT_NO_THROW(alc.dealloc(p, 128));
 }
 
 TEST(allocator, construct_copy_move) {
@@ -64,15 +64,15 @@ TEST(allocator, invalid_alloc_free) {
 
   pmr::allocator alc1 {&mem_res}, alc2;
   EXPECT_EQ(alc1.alloc(0), nullptr);
-  EXPECT_NO_THROW(alc1.free(nullptr, 128));
-  EXPECT_NO_THROW(alc1.free(nullptr, 0));
-  EXPECT_NO_THROW(alc1.free(&alc1, 0));
+  EXPECT_NO_THROW(alc1.dealloc(nullptr, 128));
+  EXPECT_NO_THROW(alc1.dealloc(nullptr, 0));
+  EXPECT_NO_THROW(alc1.dealloc(&alc1, 0));
 
   EXPECT_EQ(alc2.alloc(0), nullptr);
-  EXPECT_NO_THROW(alc2.free(nullptr, 128));
-  EXPECT_NO_THROW(alc2.free(nullptr, 0));
-  EXPECT_NO_THROW(alc2.free(&alc1, 0));
+  EXPECT_NO_THROW(alc2.dealloc(nullptr, 128));
+  EXPECT_NO_THROW(alc2.dealloc(nullptr, 0));
+  EXPECT_NO_THROW(alc2.dealloc(&alc1, 0));
 
   EXPECT_EQ(alc2.alloc(1024), nullptr);
-  EXPECT_NO_THROW(alc2.free(&alc1, sizeof(alc1)));
+  EXPECT_NO_THROW(alc2.dealloc(&alc1, sizeof(alc1)));
 }
\ No newline at end of file

From ce04c791121541bc62f122a9dfc6bc22d330d019 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 20 May 2023 17:06:16 +0800
Subject: [PATCH 168/272] upd: [imp] enum_cast => underlyof

---
 include/libimp/log.h                        | 6 +++---
 include/libimp/{enum_cast.h => underlyof.h} | 5 +++--
 src/libimp/platform/posix/system.h          | 4 ++--
 src/libimp/platform/win/system.h            | 4 ++--
 4 files changed, 10 insertions(+), 9 deletions(-)
 rename include/libimp/{enum_cast.h => underlyof.h} (77%)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index 97958eea..33c38d23 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -15,7 +15,7 @@
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
 #include "libimp/export.h"
-#include "libimp/enum_cast.h"
+#include "libimp/underlyof.h"
 #include "libimp/fmt.h"
 #include "libimp/generic.h"
 
@@ -60,7 +60,7 @@ bool context_to_string(fmt_context &f_ctx, context<T...> const &l_ctx) noexcept
   LIBIMP_TRY {
     auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(l_ctx.tp).time_since_epoch().count() % 1000;
     return detail::unfold_tuple_fmt_to(f_ctx, l_ctx.params, std::index_sequence_for<T...>{},
-                                      "[", types[enum_cast(l_ctx.level)], "]"
+                                      "[", types[underlyof(l_ctx.level)], "]"
                                       "[", l_ctx.tp, ".", spec("03")(ms), "]"
                                       "[", l_ctx.func, "] ");
   } LIBIMP_CATCH(...) {
@@ -185,7 +185,7 @@ class grip {
 
   template <typename... A>
   grip &output(log::level l, A &&... args) noexcept {
-    if (!printer_ || (enum_cast(l) < enum_cast(level_limit_))) {
+    if (!printer_ || (underlyof(l) < underlyof(level_limit_))) {
       return *this;
     }
     printer_.output(context<A &&...> {
diff --git a/include/libimp/enum_cast.h b/include/libimp/underlyof.h
similarity index 77%
rename from include/libimp/enum_cast.h
rename to include/libimp/underlyof.h
index 4b6e01d0..edef44fe 100644
--- a/include/libimp/enum_cast.h
+++ b/include/libimp/underlyof.h
@@ -1,5 +1,5 @@
 /**
- * \file libimp/enum_cast.h
+ * \file libimp/underlyof.h
  * \author mutouyun (orz@orzz.org)
  * \brief Returns the underlying type of the given enum
  * \date 2022-03-01
@@ -14,8 +14,9 @@ LIBIMP_NAMESPACE_BEG_
 
 /// \brief Returns after converting the value to the underlying type of E.
 /// \see https://en.cppreference.com/w/cpp/types/underlying_type
+///      https://en.cppreference.com/w/cpp/utility/to_underlying
 template <typename E>
-constexpr auto enum_cast(E e) noexcept {
+constexpr auto underlyof(E e) noexcept {
   return static_cast<std::underlying_type_t<E>>(e);
 }
 
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index 0c9ec9cc..fab18b79 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -71,11 +71,11 @@ result<std::int64_t> conf(info r) noexcept {
     break;
   }
   default:
-    log.error("invalid info = ", enum_cast(r));
+    log.error("invalid info = ", underlyof(r));
     return {};
   }
   auto err = sys::error();
-  log.error("info = ", enum_cast(r), ", error = ", err);
+  log.error("info = ", underlyof(r), ", error = ", err);
   return {false, (int)err.code()};
 }
 
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index 9cfe4ab9..8d59e084 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -14,7 +14,7 @@
 #include "libimp/system.h"
 #include "libimp/log.h"
 #include "libimp/codecvt.h"
-#include "libimp/enum_cast.h"
+#include "libimp/underlyof.h"
 #include "libimp/detect_plat.h"
 
 LIBIMP_NAMESPACE_BEG_
@@ -94,7 +94,7 @@ result<std::int64_t> conf(info r) noexcept {
     return (std::int64_t)info.dwPageSize;
   }
   default:
-    log.error("invalid info = ", enum_cast(r));
+    log.error("invalid info = ", underlyof(r));
     return {};
   }
 }

From 07c13f1b3a06641d0a01b3734927bba1c1feba6a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 27 May 2023 15:53:52 +0800
Subject: [PATCH 169/272] add: [imp] dataof

---
 include/libimp/dataof.h       | 92 +++++++++++++++++++++++++++++++++++
 test/imp/test_imp_utility.cpp | 19 ++++++++
 2 files changed, 111 insertions(+)
 create mode 100644 include/libimp/dataof.h

diff --git a/include/libimp/dataof.h b/include/libimp/dataof.h
new file mode 100644
index 00000000..a2d9049d
--- /dev/null
+++ b/include/libimp/dataof.h
@@ -0,0 +1,92 @@
+/**
+ * \file libimp/dataof.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Returns the data pointer of the given range
+ * \date 2023-05-27
+ */
+#pragma once
+
+#include <type_traits>  // std::declval, std::true_type, std::false_type
+#include <cstddef>      // std::size_t
+
+#include "libimp/def.h"
+#include "libimp/generic.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \see https://en.cppreference.com/w/cpp/iterator/data
+*/
+
+namespace detail_dataof {
+
+template <typename T>
+struct trait_has_data {
+private:
+  template <typename Type>
+  static std::true_type check(decltype(std::declval<Type>().data())*);
+  template <typename Type>
+  static std::false_type check(...);
+public:
+  using type = decltype(check<T>(nullptr));
+  constexpr static auto value = type::value;
+};
+
+template <typename T>
+struct trait_has_Data {
+private:
+  template <typename Type>
+  static std::true_type check(decltype(std::declval<Type>().Data())*);
+  template <typename Type>
+  static std::false_type check(...);
+public:
+  using type = decltype(check<T>(nullptr));
+  constexpr static auto value = type::value;
+};
+
+template <typename C, bool = trait_has_data<C>::value
+                    , bool = trait_has_Data<C>::value>
+struct trait;
+
+template <typename T, std::size_t N>
+struct trait<T[N], false, false> {
+  constexpr static T const *dataof(T const (&arr)[N]) noexcept {
+    return arr;
+  }
+  constexpr static T *dataof(T (&arr)[N]) noexcept {
+    return arr;
+  }
+};
+
+template <typename C, bool B>
+struct trait<C, true, B> {
+  template <typename T>
+  constexpr static auto dataof(T &&c) noexcept(noexcept(c.data())) {
+    return std::forward<T>(c).data();
+  }
+};
+
+template <typename C>
+struct trait<C, false, true> {
+  template <typename T>
+  constexpr static auto dataof(T &&c) noexcept(noexcept(c.Data())) {
+    return std::forward<T>(c).Data();
+  }
+};
+
+template <typename C>
+struct trait<C, false, false> {
+  template <typename T>
+  constexpr static T const *dataof(std::initializer_list<T> il) noexcept {
+    return il.begin();
+  }
+};
+
+} // namespace detail_dataof
+
+template <typename T, typename R = detail_dataof::trait<std::remove_cv_t<std::remove_reference_t<T>>>>
+constexpr auto dataof(T &&c) noexcept(noexcept(R::dataof(std::forward<T>(c)))) {
+  return R::dataof(std::forward<T>(c));
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/test/imp/test_imp_utility.cpp b/test/imp/test_imp_utility.cpp
index 93b02575..b5044827 100644
--- a/test/imp/test_imp_utility.cpp
+++ b/test/imp/test_imp_utility.cpp
@@ -8,6 +8,7 @@
 #include "libimp/construct.h"
 #include "libimp/pimpl.h"
 #include "libimp/countof.h"
+#include "libimp/dataof.h"
 #include "libimp/horrible_cast.h"
 #include "libimp/detect_plat.h"
 #include "libimp/generic.h"
@@ -100,9 +101,27 @@ TEST(utility, countof) {
 
   std::vector<int> vec {1, 2, 3, 4, 5};
   int arr[] {7, 6, 5, 4, 3, 2, 1};
+  auto il = {9, 7, 6, 4, 3, 1, 5};
   EXPECT_EQ(imp::countof(sv) , sv.Size());
   EXPECT_EQ(imp::countof(vec), vec.size());
   EXPECT_EQ(imp::countof(arr), sizeof(arr) / sizeof(arr[0]));
+  EXPECT_EQ(imp::countof(il) , il.size());
+}
+
+TEST(utility, dataof) {
+  struct {
+    constexpr int *Data() const noexcept { return (int *)this; }
+  } sv;
+  EXPECT_FALSE(imp::detail_dataof::trait_has_data<decltype(sv)>::value);
+  EXPECT_TRUE (imp::detail_dataof::trait_has_Data<decltype(sv)>::value);
+
+  std::vector<int> vec {1, 2, 3, 4, 5};
+  int arr[] {7, 6, 5, 4, 3, 2, 1};
+  auto il = {9, 7, 6, 4, 3, 1, 5};
+  EXPECT_EQ(imp::dataof(sv) , sv.Data());
+  EXPECT_EQ(imp::dataof(vec), vec.data());
+  EXPECT_EQ(imp::dataof(arr), arr);
+  EXPECT_EQ(imp::dataof(il) , il.begin());
 }
 
 TEST(utility, horrible_cast) {

From 3c1fec6058de8c34e3e5e0471ed3ef03b7cf1b81 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 27 May 2023 16:18:18 +0800
Subject: [PATCH 170/272] upd: [imp] span

---
 include/libconcur/queue.h  |  2 +-
 include/libimp/span.h      | 15 +++++++++++++++
 test/imp/test_imp_span.cpp | 12 ++++++++++++
 3 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/include/libconcur/queue.h b/include/libconcur/queue.h
index 25cc1ec8..32bc9b89 100644
--- a/include/libconcur/queue.h
+++ b/include/libconcur/queue.h
@@ -43,7 +43,7 @@ class queue {
     data(U &&model) noexcept
       : header_(std::forward<U>(model)) {
       auto elements = this->elements();
-      decltype(elements)::size_type i = 0;
+      typename decltype(elements)::size_type i = 0;
       LIBIMP_TRY {
         for (; i < elements.size(); ++i) {
           (void)::LIBIMP::construct<element<value_type>>(&elements[i]);
diff --git a/include/libimp/span.h b/include/libimp/span.h
index 814b584f..c05f79ba 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -19,6 +19,8 @@
 
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
+#include "libimp/countof.h"
+#include "libimp/dataof.h"
 
 #if defined(LIBIMP_CPP_20) && defined(__cpp_lib_span)
 #include <span>
@@ -56,6 +58,10 @@ using is_sized_sentinel_for =
   typename std::enable_if<std::is_convertible<decltype(std::declval<S>() - std::declval<I>()), 
                           std::ptrdiff_t>::value>::type;
 
+template <typename T>
+using is_continuous_container =
+  decltype(dataof(std::declval<T>()), countof(std::declval<T>()));
+
 /// \brief Obtain the address represented by p 
 ///        without forming a reference to the object pointed to by p.
 /// \see https://en.cppreference.com/w/cpp/memory/to_address
@@ -119,6 +125,15 @@ class span {
     : ptr_   (detail::to_address(first))
     , extent_(static_cast<size_type>(last - first)) {}
 
+  template <typename U,
+            typename = detail::is_continuous_container<U>,
+            typename = detail::is_array_convertible<std::remove_pointer_t<
+              decltype(dataof(std::declval<U>()))>, element_type>>
+  constexpr span(U &&u) noexcept(noexcept(dataof (std::forward<U>(u)), 
+                                          countof(std::forward<U>(u))))
+    : ptr_   (dataof (std::forward<U>(u)))
+    , extent_(countof(std::forward<U>(u))) {}
+
   template <typename U, std::size_t E,
             typename = detail::is_array_convertible<U, element_type>>
   constexpr span(U (&arr)[E]) noexcept
diff --git a/test/imp/test_imp_span.cpp b/test/imp/test_imp_span.cpp
index 0304f7e5..dd1f7170 100644
--- a/test/imp/test_imp_span.cpp
+++ b/test/imp/test_imp_span.cpp
@@ -60,4 +60,16 @@ TEST(span, span) {
 TEST(span, fmt) {
   EXPECT_EQ(imp::fmt(imp::span<int>{}), "");
   EXPECT_EQ(imp::fmt(imp::make_span({1, 3, 2, 4, 5, 6, 7})), "1 3 2 4 5 6 7");
+}
+
+TEST(span, construct) {
+  struct test_imp_span_construct {
+    /* data */
+    int  size() const noexcept { return sizeof(this); }
+    auto Data() const noexcept { return this; }
+  } d1;
+  imp::span<test_imp_span_construct const> sp {d1};
+  // imp::span<int const> spp {d1};
+  EXPECT_EQ(sp.size(), d1.size());
+  EXPECT_EQ(sp.data(), d1.Data());
 }
\ No newline at end of file

From 1014baf82160aad3eb454d203f710544d3c0e3ba Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 27 May 2023 16:29:05 +0800
Subject: [PATCH 171/272] upd: [imp] a little optimization of fmt

---
 include/libimp/fmt_cpo.h | 2 +-
 src/libimp/fmt.cpp       | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/libimp/fmt_cpo.h b/include/libimp/fmt_cpo.h
index 6352e812..6cf9e4ef 100644
--- a/include/libimp/fmt_cpo.h
+++ b/include/libimp/fmt_cpo.h
@@ -36,7 +36,7 @@ class LIBIMP_EXPORT fmt_context {
   bool finish() noexcept;
   span<char> buffer(std::size_t sz) noexcept;
   void expend(std::size_t sz) noexcept;
-  bool append(std::string const &str) noexcept;
+  bool append(span<char const> const &str) noexcept;
 };
 
 /// \brief Supports custom fmt_to methods for imp::fmt.
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index 8ba3ff96..2fc28951 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -196,7 +196,7 @@ void fmt_context::expend(std::size_t sz) noexcept {
   offset_ += sz;
 }
 
-bool fmt_context::append(std::string const &str) noexcept {
+bool fmt_context::append(span<char const> const &str) noexcept {
   auto sbuf = buffer(str.size());
   if (sbuf.size() < str.size()) {
     return false;

From 19cb3916249eba729aace599fe092d7072816572 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 27 May 2023 16:40:43 +0800
Subject: [PATCH 172/272] fix: [imp] fmt issue

---
 include/libimp/log.h |  6 ------
 src/libimp/fmt.cpp   | 10 ++++++----
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index 33c38d23..05fe998c 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -131,12 +131,6 @@ class traits {
   }
 };
 
-/// \brief Custom defined fmt_to method for imp::fmt
-template <typename... T>
-bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &f_ctx, context<T...> const &l_ctx) noexcept {
-  return ::LIBIMP::log::context_to_string(f_ctx, l_ctx);
-}
-
 } // namespace detail
 
 class printer {
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index 2fc28951..94bb2849 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -197,12 +197,14 @@ void fmt_context::expend(std::size_t sz) noexcept {
 }
 
 bool fmt_context::append(span<char const> const &str) noexcept {
-  auto sbuf = buffer(str.size());
-  if (sbuf.size() < str.size()) {
+  auto sz = str.size();
+  if (str.back() == '\0') --sz;
+  auto sbuf = buffer(sz);
+  if (sbuf.size() < sz) {
     return false;
   }
-  std::memcpy(sbuf.data(), str.data(), str.size());
-  offset_ += str.size();
+  std::memcpy(sbuf.data(), str.data(), sz);
+  offset_ += sz;
   return true;
 }
 

From ca78e3511bdbe648a1bcf07b270c691084dfe726 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 27 May 2023 21:19:25 +0800
Subject: [PATCH 173/272] upd: [imp] optimized log interface implementation

---
 benchmark/benchmark_log.cpp      |   8 +-
 include/libimp/fmt.h             |  11 +++
 include/libimp/generic.h         |   4 +-
 include/libimp/log.h             | 139 ++++++++++---------------------
 include/libimp/result.h          |   4 +-
 src/libimp/log.cpp               |  28 -------
 src/libipc/platform/win/get_sa.h |   2 +-
 src/libpmr/memory_resource.cpp   |   9 +-
 test/imp/test_imp_log.cpp        |  92 ++++++--------------
 9 files changed, 95 insertions(+), 202 deletions(-)
 delete mode 100644 src/libimp/log.cpp

diff --git a/benchmark/benchmark_log.cpp b/benchmark/benchmark_log.cpp
index 9f5fe09a..87f918cb 100644
--- a/benchmark/benchmark_log.cpp
+++ b/benchmark/benchmark_log.cpp
@@ -6,14 +6,14 @@
 namespace {
 
 void imp_log_no_output(benchmark::State &state) {
-  imp::log::grip log {__func__, {}};
+  LIBIMP_LOG_([](auto &&) {});
   for (auto _ : state) {
     log.debug("hello log.");
   }
 }
 
-void imp_log_gripper(benchmark::State &state) {
-  imp::log::grip log {__func__, {}};
+void imp_log_info(benchmark::State &state) {
+  LIBIMP_LOG_([](auto &&) {});
   for (auto _ : state) {
     log.info("hello log.");
   }
@@ -22,4 +22,4 @@ void imp_log_gripper(benchmark::State &state) {
 } // namespace
 
 BENCHMARK(imp_log_no_output);
-BENCHMARK(imp_log_gripper);
\ No newline at end of file
+BENCHMARK(imp_log_info);
\ No newline at end of file
diff --git a/include/libimp/fmt.h b/include/libimp/fmt.h
index 373fe120..06d53743 100644
--- a/include/libimp/fmt.h
+++ b/include/libimp/fmt.h
@@ -13,6 +13,7 @@
 #include <utility>
 #include <type_traits>
 #include <chrono>   // std::chrono::time_point
+#include <tuple>
 #include <cstddef>
 #include <ctime>    // std::tm, std::localtime
 
@@ -163,5 +164,15 @@ bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, span<T> s) {
   return true;
 }
 
+template <typename Tp, std::size_t... I>
+bool unfold_tuple_fmt_to(fmt_context &ctx, Tp const &tp, std::index_sequence<I...>) {
+  return fmt_to(ctx, std::get<I>(tp)...);
+}
+
+template <typename... T>
+bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, std::tuple<T...> const &tp) {
+  return unfold_tuple_fmt_to(ctx, tp, std::index_sequence_for<T...>{});
+}
+
 } // namespace detail
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/generic.h b/include/libimp/generic.h
index 54d12880..e0301813 100644
--- a/include/libimp/generic.h
+++ b/include/libimp/generic.h
@@ -71,9 +71,9 @@ struct is_same_first<T, T> : std::true_type {};
 } // namespace detail
 
 template <typename T, typename... A>
-using is_not_match = 
+using not_match = 
   typename std::enable_if<!detail::is_same_first<T, 
-  typename std::decay<A>::type...>::value>::type;
+  typename std::decay<A>::type...>::value, bool>::type;
 
 /**
  * \brief Determines whether a type is specialized from a particular template.
diff --git a/include/libimp/log.h b/include/libimp/log.h
index 05fe998c..e2aaa3e0 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -83,115 +83,55 @@ std::string context_to_string(context<T...> const &l_ctx) noexcept {
   }
 }
 
-namespace detail {
-
-enum out_type : unsigned {
-  out_none    = 0x0,
-  out_string  = 0x1,
-};
-
-template <typename T>
-class has_fn_output {
-  static std::integral_constant<out_type, out_none> check(...);
-
-  template <typename U, typename = decltype(std::declval<U &>().output(log::level::trace, std::declval<std::string>()))>
-  static std::integral_constant<out_type, out_string> check(U *u);
-
-public:
-  using type = decltype(check(static_cast<T *>(nullptr)));
-};
-
-template <typename T>
-constexpr out_type has_fn_output_v = has_fn_output<T>::type::value;
-
-struct vtable_t {
-  void (*output)(void *, log::level, std::string &&);
-};
-
-template <typename T>
-class traits {
-  template <typename U>
-  static auto make_fn_output() noexcept
-    -> std::enable_if_t<(has_fn_output_v<U> == out_none), decltype(vtable_t{}.output)> {
-    return [](void *, log::level, std::string &&) {};
-  }
-
-  template <typename U>
-  static auto make_fn_output() noexcept
-    -> std::enable_if_t<(has_fn_output_v<U> == out_string), decltype(vtable_t{}.output)> {
-    return [](void *p, log::level lev, std::string &&str) {
-      static_cast<U *>(p)->output(lev, std::move(str));
-    };
-  }
-
-public:
-  static auto make_vtable() noexcept {
-    static vtable_t vt { make_fn_output<T>() };
-    return &vt;
-  }
-};
-
-} // namespace detail
-
-class printer {
-  void *objp_ {nullptr};
-  detail::vtable_t *vtable_ {nullptr};
-
-public:
-  printer() noexcept = default;
-
-  template <typename T, 
-            typename = is_not_match<printer, T>>
-  printer(T &p) noexcept
-    : objp_  (static_cast<void *>(&p))
-    , vtable_(detail::traits<T>::make_vtable()) {}
-
-  explicit operator bool() const noexcept {
-    return (objp_ != nullptr) && (vtable_ != nullptr);
-  }
-
-  template <typename... T>
-  void output(context<T...> const &ctx) noexcept {
-    if (!*this) return;
-    LIBIMP_TRY {
-      vtable_->output(objp_, ctx.level, context_to_string(ctx));
-    } LIBIMP_CATCH(...) {}
-  }
-};
-
-/// \class class LIBIMP_EXPORT std_t
-/// \brief Standard console output.
-class LIBIMP_EXPORT std_t {
-public:
-  void output(log::level, std::string &&) noexcept;
-};
-
 /// \brief Standard console output object.
-LIBIMP_EXPORT extern std_t std_out;
+inline auto &make_std_out() noexcept {
+  static auto std_out = [](auto const &ctx) {
+    auto s = context_to_string(ctx);
+    switch (ctx.level) {
+    case level::trace:
+    case level::debug:
+    case level::info:
+      std::fprintf(stdout, "%s\n", s.c_str());
+      break;
+    case level::warning:
+    case level::error:
+    case level::failed:
+      std::fprintf(stderr, "%s\n", s.c_str());
+      break;
+    default:
+      break;
+    }
+  };
+  return std_out;
+}
 
 /**
  * \brief Log information grips.
  */
+template <typename Outputer>
 class grip {
-  printer printer_;
+  Outputer out_;
   char const *func_;
   level level_limit_;
 
   template <typename... A>
   grip &output(log::level l, A &&... args) noexcept {
-    if (!printer_ || (underlyof(l) < underlyof(level_limit_))) {
+    if (underlyof(l) < underlyof(level_limit_)) {
       return *this;
     }
-    printer_.output(context<A &&...> {
-      l, std::chrono::system_clock::now(), func_,
-      std::forward_as_tuple(std::forward<A>(args)...),
-    });
+    LIBIMP_TRY {
+      out_(context<A &&...> {
+        l, std::chrono::system_clock::now(), func_,
+        std::forward_as_tuple(std::forward<A>(args)...),
+      });
+    } LIBIMP_CATCH(...) {}
     return *this;
   }
 
 public:
-  grip(char const *func, printer printer = std_out, level level_limit = level::info) noexcept 
-    : printer_    (printer)
+  template <typename O>
+  grip(char const *func, O &&out, level level_limit) noexcept 
+    : out_        (std::forward<O>(out))
     , func_       (func)
     , level_limit_(level_limit) {}
 
@@ -203,7 +143,20 @@ class grip {
   template <typename... A> grip &failed (A &&...args) noexcept { return output(log::level::failed , std::forward<A>(args)...); }
 };
 
+template <typename O>
+inline auto make_grip(char const *func, O &&out, level level_limit = level::info) noexcept {
+  return grip<std::decay_t<O>>(func, std::forward<O>(out), level_limit);
+}
+
+inline auto make_grip(char const *func, level level_limit = level::info) noexcept {
+  return make_grip(func, make_std_out(), level_limit);
+}
+
+inline auto make_grip(char const */*ignore*/, char const *func, level level_limit = level::info) noexcept {
+  return make_grip(func, make_std_out(), level_limit);
+}
+
 } // namespace log
 LIBIMP_NAMESPACE_END_
 
-#define LIBIMP_LOG_(...) ::LIBIMP::log::grip log(__func__,##__VA_ARGS__)
\ No newline at end of file
+#define LIBIMP_LOG_(...) auto log = ::LIBIMP::log::make_grip(__func__,##__VA_ARGS__)
\ No newline at end of file
diff --git a/include/libimp/result.h b/include/libimp/result.h
index dd95d956..aea6738a 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -139,7 +139,7 @@ class result : public TypeTraits {
 
 public:
   template <typename... A, 
-            typename = is_not_match<result, A...>,
+            typename = not_match<result, A...>,
             typename = decltype(type_traits_t::init_code(std::declval<storage_t &>()
                                                        , std::declval<A>()...))>
   result(A &&... args) noexcept {
@@ -168,7 +168,7 @@ class result<void, TypeTraits> {
 
 public:
   template <typename... A, 
-            typename = is_not_match<result, A...>,
+            typename = not_match<result, A...>,
             typename = decltype(type_traits_t::init_code(std::declval<storage_t &>()
                                                        , std::declval<A>()...))>
   result(A &&... args) noexcept {
diff --git a/src/libimp/log.cpp b/src/libimp/log.cpp
deleted file mode 100644
index de535bba..00000000
--- a/src/libimp/log.cpp
+++ /dev/null
@@ -1,28 +0,0 @@
-#include "libimp/log.h"
-
-#include <cstdio>
-
-LIBIMP_NAMESPACE_BEG_
-namespace log {
-
-std_t std_out;
-
-void std_t::output(log::level l, std::string &&s) noexcept {
-  switch (l) {
-  case level::trace:
-  case level::debug:
-  case level::info:
-    std::fprintf(stdout, "%s\n", s.c_str());
-    break;
-  case level::warning:
-  case level::error:
-  case level::failed:
-    std::fprintf(stderr, "%s\n", s.c_str());
-    break;
-  default:
-    break;
-  }
-}
-
-} // namespace log
-LIBIMP_NAMESPACE_END_
diff --git a/src/libipc/platform/win/get_sa.h b/src/libipc/platform/win/get_sa.h
index 4fa2229f..91ec7d37 100644
--- a/src/libipc/platform/win/get_sa.h
+++ b/src/libipc/platform/win/get_sa.h
@@ -28,7 +28,7 @@ inline LPSECURITY_ATTRIBUTES get_sa() {
 
     initiator() {
       using namespace ::LIBIMP;
-      log::grip log {"get_sa"};
+      LIBIMP_LOG_("get_sa");
       if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
         log.error("failed: InitializeSecurityDescriptor(SECURITY_DESCRIPTOR_REVISION). "
                   "error = ", sys::error());
diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
index 951768c8..726fc02c 100644
--- a/src/libpmr/memory_resource.cpp
+++ b/src/libpmr/memory_resource.cpp
@@ -13,12 +13,11 @@ namespace {
 /**
  * \brief Check that bytes is not 0 and that the alignment is a power of two.
  */
-bool verify_args(::LIBIMP::log::grip &log, std::size_t bytes, std::size_t alignment) noexcept {
+bool verify_args(std::size_t bytes, std::size_t alignment) noexcept {
   if (bytes == 0) {
     return false;
   }
   if ((alignment == 0) || (alignment & (alignment - 1)) != 0) {
-    log.error("invalid bytes = ", bytes, ", alignment = ", alignment);
     return false;
   }
   return true;
@@ -47,7 +46,8 @@ new_delete_resource *new_delete_resource::get() noexcept {
  */
 void *new_delete_resource::allocate(std::size_t bytes, std::size_t alignment) noexcept {
   LIBIMP_LOG_();
-  if (!verify_args(log, bytes, alignment)) {
+  if (!verify_args(bytes, alignment)) {
+    log.error("invalid bytes = ", bytes, ", alignment = ", alignment);
     return nullptr;
   }
 #if defined(LIBIMP_CPP_17)
@@ -89,7 +89,8 @@ void new_delete_resource::deallocate(void *p, std::size_t bytes, std::size_t ali
   if (p == nullptr) {
     return;
   }
-  if (!verify_args(log, bytes, alignment)) {
+  if (!verify_args(bytes, alignment)) {
+    log.error("invalid bytes = ", bytes, ", alignment = ", alignment);
     return;
   }
 #if defined(LIBIMP_CPP_17)
diff --git a/test/imp/test_imp_log.cpp b/test/imp/test_imp_log.cpp
index 631d661f..93e89a7e 100644
--- a/test/imp/test_imp_log.cpp
+++ b/test/imp/test_imp_log.cpp
@@ -6,76 +6,9 @@
 
 #include "libimp/log.h"
 
-TEST(log, detail) {
-  EXPECT_EQ(imp::log::detail::has_fn_output_v<int>, imp::log::detail::out_none);
-
-  struct foo {
-    int info(std::string);
-  };
-  EXPECT_EQ(imp::log::detail::has_fn_output_v<foo>, imp::log::detail::out_none);
-
-  struct bar {
-    int info(char const *);
-    void output(imp::log::level, std::string &&);
-  };
-  EXPECT_EQ(imp::log::detail::has_fn_output_v<bar>, imp::log::detail::out_string);
-
-  struct str {
-    str(std::string const &);
-  };
-  struct foo_bar {
-    void output(imp::log::level, str);
-  };
-  EXPECT_EQ(imp::log::detail::has_fn_output_v<foo_bar>, imp::log::detail::out_string);
-
-  auto vt_int = imp::log::detail::traits<int>::make_vtable();
-  EXPECT_NE(vt_int, nullptr);
-  EXPECT_NO_THROW(vt_int->output(nullptr, imp::log::level::error, ""));
-
-  struct log {
-    std::string what;
-    void output(imp::log::level l, std::string &&s) {
-      if (l == imp::log::level::error) what += s + '\n';
-    }
-  } ll;
-  auto vt_log = imp::log::detail::traits<log>::make_vtable();
-  EXPECT_NE(vt_log, nullptr);
-
-  vt_log->output(&ll, imp::log::level::info, "123");
-  vt_log->output(&ll, imp::log::level::info, "321");
-  vt_log->output(&ll, imp::log::level::info, "654");
-  vt_log->output(&ll, imp::log::level::info, "456");
-  std::cout << ll.what << "\n";
-  SUCCEED();
-}
-
-TEST(log, log_printer) {
-  struct log {
-    std::string i;
-    std::string e;
-
-    void output(imp::log::level l, std::string &&s) {
-      if (l == imp::log::level::error) e += s + "\n";
-      else if (l == imp::log::level::info) i += s + "\n";
-    }
-  } ll;
-
-  imp::log::printer pt = ll;
-  pt.output(imp::log::context<char const *>{imp::log::level::info , std::chrono::system_clock::now(), __func__, "hello "});
-  pt.output(imp::log::context<char const *>{imp::log::level::error, std::chrono::system_clock::now(), __func__, "failed: "});
-  pt.output(imp::log::context<char const *>{imp::log::level::info , std::chrono::system_clock::now(), __func__, "log-pt"});
-  pt.output(imp::log::context<char const *>{imp::log::level::error, std::chrono::system_clock::now(), __func__, "whatever"});
-  std::cout << ll.i << "\n";
-  std::cout << ll.e << "\n";
-
-  imp::log::printer ps = imp::log::std_out;
-  ps.output(imp::log::context<char const *>{imp::log::level::info, std::chrono::system_clock::now(), __func__, "hello world"});
-  SUCCEED();
-}
-
 TEST(log, gripper) {
   {
-    imp::log::grip log {__func__};
+    LIBIMP_LOG_();
     log.info("hello");
   }
   {
@@ -84,3 +17,26 @@ TEST(log, gripper) {
   }
   SUCCEED();
 }
+
+TEST(log, custom) {
+  struct log {
+    std::string i;
+    std::string e;
+  } ll_data;
+  auto ll = [&ll_data](auto &&ctx) mutable {
+    auto s = imp::fmt(ctx.params);
+    if (ctx.level == imp::log::level::error) ll_data.e += s + " ";
+    else
+    if (ctx.level == imp::log::level::info ) ll_data.i += s + " ";
+  };
+
+  LIBIMP_LOG_(ll);
+
+  log.info ("hello");
+  log.error("failed:");
+  log.info ("log-pt");
+  log.error("whatever");
+
+  EXPECT_EQ(ll_data.i, "hello log-pt ");
+  EXPECT_EQ(ll_data.e, "failed: whatever ");
+}

From 3cb323d748ff67595f3a8dc2bbe2610200b5c541 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 27 May 2023 21:22:49 +0800
Subject: [PATCH 174/272] =?UTF-8?q?fix:=20=E2=80=98reinterpret=5Fcast?=
 =?UTF-8?q?=E2=80=99=20is=20not=20a=20constant=20expression?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 test/imp/test_imp_utility.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/imp/test_imp_utility.cpp b/test/imp/test_imp_utility.cpp
index b5044827..1de8bb44 100644
--- a/test/imp/test_imp_utility.cpp
+++ b/test/imp/test_imp_utility.cpp
@@ -110,7 +110,7 @@ TEST(utility, countof) {
 
 TEST(utility, dataof) {
   struct {
-    constexpr int *Data() const noexcept { return (int *)this; }
+    int *Data() const noexcept { return (int *)this; }
   } sv;
   EXPECT_FALSE(imp::detail_dataof::trait_has_data<decltype(sv)>::value);
   EXPECT_TRUE (imp::detail_dataof::trait_has_Data<decltype(sv)>::value);

From 9be0651ae8cb61cc82bdf4598f84dfcbb282e256 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 27 May 2023 21:23:50 +0800
Subject: [PATCH 175/272] fix: warning C4138 '*/' found outside of comment

---
 include/libimp/log.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index e2aaa3e0..7bb07986 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -152,7 +152,7 @@ inline auto make_grip(char const *func, level level_limit = level::info) noexcep
   return make_grip(func, make_std_out(), level_limit);
 }
 
-inline auto make_grip(char const */*ignore*/, char const *func, level level_limit = level::info) noexcept {
+inline auto make_grip(char const * /*ignore*/, char const *func, level level_limit = level::info) noexcept {
   return make_grip(func, make_std_out(), level_limit);
 }
 

From 15db3c6234d078d0dc63d2088cdc803a50a42898 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 28 May 2023 12:24:36 +0800
Subject: [PATCH 176/272] upd: queue ut

---
 test/concur/test_concur_queue.cpp | 42 +++++++++++++++++++++++--------
 1 file changed, 32 insertions(+), 10 deletions(-)

diff --git a/test/concur/test_concur_queue.cpp b/test/concur/test_concur_queue.cpp
index 7444c15a..367f2dcf 100644
--- a/test/concur/test_concur_queue.cpp
+++ b/test/concur/test_concur_queue.cpp
@@ -2,6 +2,7 @@
 #include "gtest/gtest.h"
 
 #include "libconcur/queue.h"
+#include "libimp/log.h"
 
 using namespace concur;
 
@@ -13,8 +14,11 @@ TEST(queue, construct) {
   EXPECT_EQ(q1.approx_size(), 0);
 }
 
-TEST(queue, push_pop) {
-  using queue_t = queue<int>;
+namespace {
+
+template <typename PR, typename CR>
+void test_queue_basic() {
+  using queue_t = queue<int, PR, CR>;
   queue_t q1;
   EXPECT_TRUE(q1.valid());
   EXPECT_TRUE(q1.empty());
@@ -32,17 +36,17 @@ TEST(queue, push_pop) {
 
   int count = 0;
   auto push = [&q1, &count](int i) {
-    EXPECT_TRUE(q1.push(i));
-    EXPECT_FALSE(q1.empty());
+    ASSERT_TRUE(q1.push(i));
+    ASSERT_FALSE(q1.empty());
     ++count;
-    EXPECT_EQ(q1.approx_size(), count);
+    ASSERT_EQ(q1.approx_size(), count);
   };
   auto pop = [&q1, &count](int i) {
     int value;
-    EXPECT_TRUE(q1.pop(value));
-    EXPECT_EQ(value, i);
+    ASSERT_TRUE(q1.pop(value));
+    ASSERT_EQ(value, i);
     --count;
-    EXPECT_EQ(q1.approx_size(), count);
+    ASSERT_EQ(q1.approx_size(), count);
   };
 
   for (int i = 0; i < 1000; ++i) {
@@ -55,8 +59,26 @@ TEST(queue, push_pop) {
   for (int i = 0; i < default_circle_buffer_size; ++i) {
     push(i);
   }
-  EXPECT_FALSE(q1.push(65536));
+  ASSERT_FALSE(q1.push(65536));
   for (int i = 0; i < default_circle_buffer_size; ++i) {
     pop(i);
   }
-}
\ No newline at end of file
+}
+
+} // namespace
+
+TEST(queue, push_pop) {
+  test_queue_basic<relation::single, relation::single>();
+  test_queue_basic<relation::single, relation::multi >();
+  test_queue_basic<relation::multi , relation::multi >();
+}
+
+namespace {
+
+template <typename PR, typename CR>
+void test_queue(std::size_t np, std::size_t nc) {
+  LIBIMP_LOG_();
+
+}
+
+} // namespace
\ No newline at end of file

From e200c49f24c3b8ba8aa4fb65c7ecc5a04ef3471c Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 28 May 2023 12:37:54 +0800
Subject: [PATCH 177/272] fix: [concur] initialization issues for queue

---
 include/libconcur/queue.h | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/include/libconcur/queue.h b/include/libconcur/queue.h
index 32bc9b89..544964b0 100644
--- a/include/libconcur/queue.h
+++ b/include/libconcur/queue.h
@@ -40,7 +40,7 @@ class queue {
     ::LIBIMP::aligned<element<value_type>> elements_start_;
 
     template <typename U>
-    data(U &&model) noexcept
+    data(U &&model)
       : header_(std::forward<U>(model)) {
       auto elements = this->elements();
       typename decltype(elements)::size_type i = 0;
@@ -52,6 +52,7 @@ class queue {
         for (decltype(i) k = 0; k < i; ++k) {
           (void)::LIBIMP::destroy<element<value_type>>(&elements[k]);
         }
+        throw;
       }
     }
 
@@ -79,21 +80,23 @@ class queue {
     if (!data_allocator_) {
       return nullptr;
     }
+    void *data_ptr = nullptr;
     LIBIMP_TRY {
-      auto data_ptr = data_allocator_.alloc(data::size_of(circ_size));
+      data_ptr = data_allocator_.alloc(data::size_of(circ_size));
       if (data_ptr == nullptr) {
         return nullptr;
       }
       return ::LIBIMP::construct<data>(data_ptr, circ_size);
     } LIBIMP_CATCH(...) {
+      data_allocator_.dealloc(data_ptr, data::size_of(circ_size));
       return nullptr;
     }
   }
 
   ::LIBPMR::allocator data_allocator_;
-  std::atomic<size_type> size_;
+  std::atomic<size_type> size_ {0};
   data *data_;
-  typename concur::traits<model_type>::context context_;
+  typename concur::traits<model_type>::context context_ {};
 
 public:
   queue(queue const &) = delete;

From f2ae0f5a3ae386ac6f3cff8d1324fee039ffe41e Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 28 May 2023 12:47:38 +0800
Subject: [PATCH 178/272] fix: (vs2015) call does not result in a constant
 expression

---
 include/libconcur/concurrent.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index aaea18a7..440d6646 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -457,14 +457,14 @@ struct prod_cons : producer<TransModT, ProdModT>
                 , traits<consumer<TransModT, ConsModT>>::header {
     index_t const circ_size;
 
-    constexpr header(index_t cs) noexcept
+    header(index_t cs) noexcept
       : circ_size(cs) {}
 
     template <typename T>
-    constexpr header(::LIBIMP::span<element<T>> const &elems) noexcept
+    header(::LIBIMP::span<element<T>> const &elems) noexcept
       : circ_size(static_cast<index_t>(elems.size())) {}
 
-    constexpr bool valid() const noexcept {
+    bool valid() const noexcept {
       // circ_size must be a power of two.
       return (circ_size > 1) && ((circ_size & (circ_size - 1)) == 0);
     }

From af96a09e36a44f61d9f8c582a08b1dff9505fc0a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 28 May 2023 13:01:09 +0800
Subject: [PATCH 179/272] upd: [imp] output interface of the log should be
 const

---
 include/libimp/log.h      | 28 ++++++++++++++--------------
 test/imp/test_imp_log.cpp |  2 +-
 2 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index 7bb07986..4231a40c 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -114,8 +114,15 @@ class grip {
   char const *func_;
   level level_limit_;
 
+public:
+  template <typename O>
+  grip(char const *func, O &&out, level level_limit) noexcept 
+    : out_        (std::forward<O>(out))
+    , func_       (func)
+    , level_limit_(level_limit) {}
+
   template <typename... A>
-  grip &output(log::level l, A &&... args) noexcept {
+  grip const &operator()(log::level l, A &&... args) const noexcept {
     if (underlyof(l) < underlyof(level_limit_)) {
       return *this;
     }
@@ -128,19 +135,12 @@ class grip {
     return *this;
   }
 
-public:
-  template <typename O>
-  grip(char const *func, O &&out, level level_limit) noexcept 
-    : out_        (std::forward<O>(out))
-    , func_       (func)
-    , level_limit_(level_limit) {}
-
-  template <typename... A> grip &trace  (A &&...args) noexcept { return output(log::level::trace  , std::forward<A>(args)...); }
-  template <typename... A> grip &debug  (A &&...args) noexcept { return output(log::level::debug  , std::forward<A>(args)...); }
-  template <typename... A> grip &info   (A &&...args) noexcept { return output(log::level::info   , std::forward<A>(args)...); }
-  template <typename... A> grip &warning(A &&...args) noexcept { return output(log::level::warning, std::forward<A>(args)...); }
-  template <typename... A> grip &error  (A &&...args) noexcept { return output(log::level::error  , std::forward<A>(args)...); }
-  template <typename... A> grip &failed (A &&...args) noexcept { return output(log::level::failed , std::forward<A>(args)...); }
+  template <typename... A> grip const &trace  (A &&...args) const noexcept { return (*this)(log::level::trace  , std::forward<A>(args)...); }
+  template <typename... A> grip const &debug  (A &&...args) const noexcept { return (*this)(log::level::debug  , std::forward<A>(args)...); }
+  template <typename... A> grip const &info   (A &&...args) const noexcept { return (*this)(log::level::info   , std::forward<A>(args)...); }
+  template <typename... A> grip const &warning(A &&...args) const noexcept { return (*this)(log::level::warning, std::forward<A>(args)...); }
+  template <typename... A> grip const &error  (A &&...args) const noexcept { return (*this)(log::level::error  , std::forward<A>(args)...); }
+  template <typename... A> grip const &failed (A &&...args) const noexcept { return (*this)(log::level::failed , std::forward<A>(args)...); }
 };
 
 template <typename O>
diff --git a/test/imp/test_imp_log.cpp b/test/imp/test_imp_log.cpp
index 93e89a7e..05a9ee79 100644
--- a/test/imp/test_imp_log.cpp
+++ b/test/imp/test_imp_log.cpp
@@ -23,7 +23,7 @@ TEST(log, custom) {
     std::string i;
     std::string e;
   } ll_data;
-  auto ll = [&ll_data](auto &&ctx) mutable {
+  auto ll = [&ll_data](auto &&ctx) {
     auto s = imp::fmt(ctx.params);
     if (ctx.level == imp::log::level::error) ll_data.e += s + " ";
     else

From f6af39419523d8287b0508303bc30f293401af71 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 28 May 2023 13:54:29 +0800
Subject: [PATCH 180/272] add: basic mt ut for queue

---
 include/libimp/nameof.h           |  3 +-
 test/concur/test_concur_queue.cpp | 78 ++++++++++++++++++++++++++++++-
 2 files changed, 79 insertions(+), 2 deletions(-)

diff --git a/include/libimp/nameof.h b/include/libimp/nameof.h
index 0e1396d9..dded0c39 100644
--- a/include/libimp/nameof.h
+++ b/include/libimp/nameof.h
@@ -11,6 +11,7 @@
 #include <cstring>
 
 #include "libimp/def.h"
+#include "libimp/export.h"
 #include "libimp/span.h"
 
 LIBIMP_NAMESPACE_BEG_
@@ -22,7 +23,7 @@ LIBIMP_NAMESPACE_BEG_
  * \param name the mangled name
  * \return std::string a human-readable demangled type name
  */
-std::string demangle(span<char const> name) noexcept;
+LIBIMP_EXPORT std::string demangle(span<char const> name) noexcept;
 
 /**
  * \brief Returns an implementation defined string containing the name of the type.
diff --git a/test/concur/test_concur_queue.cpp b/test/concur/test_concur_queue.cpp
index 367f2dcf..d01261af 100644
--- a/test/concur/test_concur_queue.cpp
+++ b/test/concur/test_concur_queue.cpp
@@ -1,8 +1,14 @@
 
+#include <cstdint>
+#include <cstddef>
+#include <atomic>
+#include <array>
+
 #include "gtest/gtest.h"
 
 #include "libconcur/queue.h"
 #include "libimp/log.h"
+#include "libimp/nameof.h"
 
 using namespace concur;
 
@@ -78,7 +84,77 @@ namespace {
 template <typename PR, typename CR>
 void test_queue(std::size_t np, std::size_t nc) {
   LIBIMP_LOG_();
+  log.info("\n\tStart with: [", imp::nameof<PR>(), " - ", imp::nameof<CR>(), "]\n\t\t", np, " producers, ", nc, " consumers...");
+
+  struct Data {
+    std::uint64_t n;
+    std::uint64_t i;
+  };
+  queue<Data, PR, CR> que;
+
+  constexpr static std::uint32_t loop_size = 10'0000;
+
+  std::atomic<std::uint64_t> sum {0};
+  std::atomic<std::size_t> running {np};
+
+  auto prod_call = [&](std::size_t n) {
+    for (std::uint32_t i = 1; i <= loop_size; ++i) {
+      std::this_thread::yield();
+      for (std::uint32_t k = 1; !que.push(Data{n, i}); ++k) {
+        std::this_thread::yield();
+        if (k % (loop_size / 10) == 0) {
+          log.info("[", n, "] put count: ", i, ", retry: ", k);
+          std::this_thread::sleep_for(std::chrono::milliseconds(1));
+        }
+      }
+      if (i % (loop_size / 10) == 0) {
+        log.info("[", n, "] put count: ", i);
+      }
+    }
+    --running;
+  };
+  auto cons_call = [&] {
+    for (;;) {
+      std::this_thread::yield();
+      Data v;
+      while (!que.pop(v)) {
+        if (running == 0) return;
+        std::this_thread::yield();
+      }
+      sum += v.i;
+    }
+  };
+
+  std::vector<std::thread> prods(np);
+  for (std::size_t n = 0; n < np; ++n) prods[n] = std::thread(prod_call, n);
+  std::vector<std::thread> conss(nc);
+  for (auto &c : conss) c = std::thread(cons_call);
+
+  for (auto &p : prods) p.join();
+  for (auto &c : conss) c.join();
 
+  EXPECT_EQ(sum, np * (loop_size * std::uint64_t(loop_size + 1)) / 2);
 }
 
-} // namespace
\ No newline at end of file
+} // namespace
+
+TEST(queue, multi_thread) {
+  using namespace concur;
+
+  /// \brief 1-1
+  test_queue<relation::single, relation::single>(1, 1);
+  test_queue<relation::single, relation::multi >(1, 1);
+  test_queue<relation::multi , relation::single>(1, 1);
+  test_queue<relation::multi , relation::multi >(1, 1);
+
+  /// \brief 8-1
+  test_queue<relation::multi , relation::single>(8, 1);
+  test_queue<relation::multi , relation::multi >(8, 1);
+
+  /// \brief 1-8
+  test_queue<relation::single, relation::multi >(1, 8);
+  test_queue<relation::multi , relation::multi >(1, 8);
+
+  /// \brief 8-8
+  test_queue<relation::multi , relation::multi >(8, 8);
+}

From 9b15767084b9e4b9a18ea76db70c6b3b73c9e9b4 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 28 May 2023 14:38:21 +0800
Subject: [PATCH 181/272] add: [concur] benchmark for queue

---
 benchmark/benchmark_concur.cpp | 66 ++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 benchmark/benchmark_concur.cpp

diff --git a/benchmark/benchmark_concur.cpp b/benchmark/benchmark_concur.cpp
new file mode 100644
index 00000000..712db08a
--- /dev/null
+++ b/benchmark/benchmark_concur.cpp
@@ -0,0 +1,66 @@
+
+#include <thread>
+#include <future>
+#include <atomic>
+#include <vector>
+
+#include "benchmark/benchmark.h"
+
+#include "libconcur/queue.h"
+
+namespace {
+
+void concur_queue_1v1(benchmark::State &state) {
+  using namespace concur;
+  queue<std::int64_t, relation::single, relation::single> que;
+  std::atomic_bool stop = false;
+  auto producer = std::async(std::launch::async, [&stop, &que] {
+    for (std::int64_t i = 0; !stop.load(std::memory_order_relaxed); ++i) {
+      (void)que.push(i);
+      std::this_thread::yield();
+    }
+  });
+
+  for (auto _ : state) {
+    std::int64_t i;
+    while (!que.pop(i)) std::this_thread::yield();
+  }
+
+  stop = true;
+  producer.wait();
+}
+
+void concur_queue_NvN(benchmark::State &state) {
+  using namespace concur;
+
+  static queue<std::int64_t, relation::multi, relation::multi> que;
+  static std::atomic_int run = 0;
+  static std::vector<std::thread> prods;
+
+  if (state.thread_index() == 0) {
+    run = state.threads();
+    prods.resize(state.threads());
+    auto producer = [] {
+      for (std::int64_t i = 0; run.load(std::memory_order_relaxed) > 0; ++i) {
+        (void)que.push(i);
+        std::this_thread::yield();
+      }
+    };
+    for (auto &p : prods) p = std::thread(producer);
+  }
+
+  for (auto _ : state) {
+    std::int64_t i;
+    while (!que.pop(i)) std::this_thread::yield();
+  }
+  run -= 1;
+
+  if (state.thread_index() == 0) {
+    for (auto &p : prods) p.join();
+  }
+}
+
+} // namespace
+
+BENCHMARK(concur_queue_1v1);
+BENCHMARK(concur_queue_NvN)->ThreadRange(1, 16);
\ No newline at end of file

From a55bcd8abfd472061bb5fb3f507644c1d251d8f9 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 28 May 2023 14:40:28 +0800
Subject: [PATCH 182/272] =?UTF-8?q?fix:=20=E2=80=98std::this=5Fthread?=
 =?UTF-8?q?=E2=80=99=20has=20not=20been=20declared?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 test/concur/test_concur_queue.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test/concur/test_concur_queue.cpp b/test/concur/test_concur_queue.cpp
index d01261af..458dfa6a 100644
--- a/test/concur/test_concur_queue.cpp
+++ b/test/concur/test_concur_queue.cpp
@@ -3,6 +3,7 @@
 #include <cstddef>
 #include <atomic>
 #include <array>
+#include <thread>
 
 #include "gtest/gtest.h"
 

From 8a4e6be9dae1b7fba2faa0b41b0453e750ed55b1 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 28 May 2023 19:05:17 +0800
Subject: [PATCH 183/272] add: [concur] (TBD) bus

---
 benchmark/CMakeLists.txt        |   2 +-
 include/libconcur/bus.h         |  19 +++-
 include/libconcur/data_model.h  | 167 ++++++++++++++++++++++++++++++++
 include/libconcur/queue.h       | 148 ++--------------------------
 test/concur/test_concur_bus.cpp |   4 +
 5 files changed, 198 insertions(+), 142 deletions(-)
 create mode 100644 include/libconcur/data_model.h

diff --git a/benchmark/CMakeLists.txt b/benchmark/CMakeLists.txt
index f8dbd5dc..a81d85ff 100644
--- a/benchmark/CMakeLists.txt
+++ b/benchmark/CMakeLists.txt
@@ -37,4 +37,4 @@ add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
 
 target_link_libraries(${PROJECT_NAME}
   benchmark_main fmt
-  imp ipc)
+  imp pmr ipc)
diff --git a/include/libconcur/bus.h b/include/libconcur/bus.h
index 5f68c649..0b1a80fc 100644
--- a/include/libconcur/bus.h
+++ b/include/libconcur/bus.h
@@ -7,10 +7,27 @@
 #pragma once
 
 #include "libconcur/def.h"
-#include "libconcur/concurrent.h"
+#include "libconcur/data_model.h"
 
 LIBCONCUR_NAMESPACE_BEG_
 
+template <typename T, typename PRelationT = relation::multi>
+class bus
+  : public data_model<T, trans::broadcast, PRelationT, relation::multi> {
 
+  using base_t = data_model<T, trans::broadcast, PRelationT, relation::multi>;
+
+public:
+  using base_t::base_t;
+
+  template <typename U>
+  bool broadcast(U &&value) noexcept {
+    return this->enqueue(std::forward<U>(value));
+  }
+
+  bool receive(typename base_t::value_type &value) noexcept {
+    return this->dequeue(value);
+  }
+};
 
 LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/data_model.h b/include/libconcur/data_model.h
new file mode 100644
index 00000000..5c5b5c4f
--- /dev/null
+++ b/include/libconcur/data_model.h
@@ -0,0 +1,167 @@
+/**
+ * \file libconcur/data_model.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the concurrent data model.
+ * \date 2023-05-28
+ */
+#pragma once
+
+#include <atomic>
+#include <array>
+#include <cstddef>
+#include <cstdint>
+
+#include "libimp/construct.h"
+#include "libimp/detect_plat.h"
+#include "libimp/aligned.h"
+
+#include "libpmr/allocator.h"
+#include "libpmr/memory_resource.h"
+
+#include "libconcur/def.h"
+#include "libconcur/concurrent.h"
+
+LIBCONCUR_NAMESPACE_BEG_
+
+template <typename T, typename TransModT, typename PRelationT, typename CRelationT>
+class data_model {
+public:
+  using producer_relation_t = PRelationT;
+  using consumer_relation_t = CRelationT;
+  using transmission_mode_t = TransModT;
+
+  using model_type = prod_cons<transmission_mode_t, producer_relation_t, consumer_relation_t>;
+  using value_type = T;
+  using size_type  = std::int64_t;
+
+private:
+  struct data {
+    model_type model_;
+    typename concur::traits<model_type>::header header_;
+    ::LIBIMP::aligned<element<value_type>> elements_start_;
+
+    template <typename U>
+    data(U &&model) : header_(std::forward<U>(model)) {
+      auto elements = this->elements();
+      typename decltype(elements)::size_type i = 0;
+      LIBIMP_TRY {
+        for (; i < elements.size(); ++i) {
+          (void)::LIBIMP::construct<element<value_type>>(&elements[i]);
+        }
+      } LIBIMP_CATCH(...) {
+        for (decltype(i) k = 0; k < i; ++k) {
+          (void)::LIBIMP::destroy<element<value_type>>(&elements[k]);
+        }
+        throw;
+      }
+    }
+
+    ~data() noexcept {
+      for (auto &elem : this->elements()) {
+        (void)::LIBIMP::destroy<element<value_type>>(&elem);
+      }
+    }
+
+    static std::size_t size_of(index_t circ_size) noexcept {
+      return sizeof(struct data) + ( (circ_size - 1) * sizeof(element<value_type>) );
+    }
+
+    std::size_t byte_size() const noexcept {
+      return size_of(header_.circ_size);
+    }
+
+    /// \brief element<value_type> elements[0];
+    ::LIBIMP::span<element<value_type>> elements() noexcept {
+      return {elements_start_.ptr(), header_.circ_size};
+    }
+  };
+
+  data *init(index_t circ_size) noexcept {
+    if (!data_allocator_) {
+      return nullptr;
+    }
+    void *data_ptr = nullptr;
+    LIBIMP_TRY {
+      data_ptr = data_allocator_.alloc(data::size_of(circ_size));
+      if (data_ptr == nullptr) {
+        return nullptr;
+      }
+      return ::LIBIMP::construct<data>(data_ptr, circ_size);
+    } LIBIMP_CATCH(...) {
+      data_allocator_.dealloc(data_ptr, data::size_of(circ_size));
+      return nullptr;
+    }
+  }
+
+  ::LIBPMR::allocator data_allocator_;
+  std::atomic<size_type> size_ {0};
+  data *data_;
+  typename concur::traits<model_type>::context context_ {};
+
+protected:
+  template <typename U>
+  bool enqueue(U &&value) noexcept {
+    if (!valid()) return false;
+    if (!data_->model_.enqueue(data_->elements(), data_->header_, context_, std::forward<U>(value))) {
+      return false;
+    }
+    size_.fetch_add(1, std::memory_order_relaxed);
+    return true;
+  }
+
+  bool dequeue(value_type &value) noexcept {
+    if (!valid()) return false;
+    if (!data_->model_.dequeue(data_->elements(), data_->header_, context_, value)) {
+      return false;
+    }
+    size_.fetch_sub(1, std::memory_order_relaxed);
+    return true;
+  }
+
+public:
+  data_model(data_model const &) = delete;
+  data_model(data_model &&) = delete;
+  data_model &operator=(data_model const &) = delete;
+  data_model &operator=(data_model &&) = delete;
+
+  ~data_model() noexcept {
+    if (valid()) {
+      auto sz = data_->byte_size();
+      (void)::LIBIMP::destroy<data>(data_);
+      data_allocator_.dealloc(data_, sz);
+    }
+  }
+
+  template <typename MR, ::LIBPMR::verify_memory_resource<MR> = true>
+  explicit data_model(index_t circ_size, MR *memory_resource) noexcept
+    : data_allocator_(memory_resource)
+    , data_(init(circ_size)) {}
+
+  template <typename MR, ::LIBPMR::verify_memory_resource<MR> = true>
+  explicit data_model(MR *memory_resource) noexcept
+    : data_model(default_circle_buffer_size, memory_resource) {}
+
+  explicit data_model(index_t circ_size) noexcept
+    : data_model(circ_size, ::LIBPMR::new_delete_resource::get()) {}
+
+  data_model() noexcept
+    : data_model(default_circle_buffer_size) {}
+
+  bool valid() const noexcept {
+    return (data_ != nullptr) && data_allocator_.valid();
+  }
+
+  explicit operator bool() const noexcept {
+    return valid();
+  }
+
+  size_type approx_size() const noexcept {
+    return size_.load(std::memory_order_relaxed);
+  }
+
+  bool empty() const noexcept {
+    return !valid() || (approx_size() == 0);
+  }
+};
+
+LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/queue.h b/include/libconcur/queue.h
index 544964b0..a8daed08 100644
--- a/include/libconcur/queue.h
+++ b/include/libconcur/queue.h
@@ -6,160 +6,28 @@
  */
 #pragma once
 
-#include <atomic>
-#include <array>
-#include <cstddef>
-#include <cstdint>
-
-#include "libimp/construct.h"
-#include "libimp/detect_plat.h"
-#include "libimp/aligned.h"
-
-#include "libpmr/allocator.h"
-#include "libpmr/memory_resource.h"
-
 #include "libconcur/def.h"
-#include "libconcur/concurrent.h"
+#include "libconcur/data_model.h"
 
 LIBCONCUR_NAMESPACE_BEG_
 
 template <typename T, typename PRelationT = relation::multi
                     , typename CRelationT = relation::multi>
-class queue {
-public:
-  using producer_relation_t = PRelationT;
-  using consumer_relation_t = CRelationT;
-  using model_type = prod_cons<trans::unicast, producer_relation_t, consumer_relation_t>;
-  using value_type = T;
-  using size_type  = std::int64_t;
-
-private:
-  struct data {
-    model_type model_;
-    typename concur::traits<model_type>::header header_;
-    ::LIBIMP::aligned<element<value_type>> elements_start_;
-
-    template <typename U>
-    data(U &&model)
-      : header_(std::forward<U>(model)) {
-      auto elements = this->elements();
-      typename decltype(elements)::size_type i = 0;
-      LIBIMP_TRY {
-        for (; i < elements.size(); ++i) {
-          (void)::LIBIMP::construct<element<value_type>>(&elements[i]);
-        }
-      } LIBIMP_CATCH(...) {
-        for (decltype(i) k = 0; k < i; ++k) {
-          (void)::LIBIMP::destroy<element<value_type>>(&elements[k]);
-        }
-        throw;
-      }
-    }
-
-    ~data() noexcept {
-      for (auto &elem : this->elements()) {
-        (void)::LIBIMP::destroy<element<value_type>>(&elem);
-      }
-    }
+class queue
+  : public data_model<T, trans::unicast, PRelationT, CRelationT> {
 
-    static std::size_t size_of(index_t circ_size) noexcept {
-      return sizeof(struct data) + ( (circ_size - 1) * sizeof(element<value_type>) );
-    }
-
-    std::size_t byte_size() const noexcept {
-      return size_of(header_.circ_size);
-    }
-
-    /// \brief element<value_type> elements[0];
-    ::LIBIMP::span<element<value_type>> elements() noexcept {
-      return {elements_start_.ptr(), header_.circ_size};
-    }
-  };
-
-  data *init(index_t circ_size) noexcept {
-    if (!data_allocator_) {
-      return nullptr;
-    }
-    void *data_ptr = nullptr;
-    LIBIMP_TRY {
-      data_ptr = data_allocator_.alloc(data::size_of(circ_size));
-      if (data_ptr == nullptr) {
-        return nullptr;
-      }
-      return ::LIBIMP::construct<data>(data_ptr, circ_size);
-    } LIBIMP_CATCH(...) {
-      data_allocator_.dealloc(data_ptr, data::size_of(circ_size));
-      return nullptr;
-    }
-  }
-
-  ::LIBPMR::allocator data_allocator_;
-  std::atomic<size_type> size_ {0};
-  data *data_;
-  typename concur::traits<model_type>::context context_ {};
+  using base_t = data_model<T, trans::unicast, PRelationT, CRelationT>;
 
 public:
-  queue(queue const &) = delete;
-  queue(queue &&) = delete;
-  queue &operator=(queue const &) = delete;
-  queue &operator=(queue &&) = delete;
-
-  ~queue() noexcept {
-    if (valid()) {
-      auto sz = data_->byte_size();
-      (void)::LIBIMP::destroy<data>(data_);
-      data_allocator_.dealloc(data_, sz);
-    }
-  }
-
-  template <typename MR, ::LIBPMR::verify_memory_resource<MR> = true>
-  explicit queue(index_t circ_size, MR *memory_resource) noexcept
-    : data_allocator_(memory_resource)
-    , data_(init(circ_size)) {}
-
-  template <typename MR, ::LIBPMR::verify_memory_resource<MR> = true>
-  explicit queue(MR *memory_resource) noexcept
-    : queue(default_circle_buffer_size, memory_resource) {}
-
-  explicit queue(index_t circ_size) noexcept
-    : queue(circ_size, ::LIBPMR::new_delete_resource::get()) {}
-
-  queue() noexcept
-    : queue(default_circle_buffer_size) {}
-
-  bool valid() const noexcept {
-    return (data_ != nullptr) && data_allocator_.valid();
-  }
-
-  explicit operator bool() const noexcept {
-    return valid();
-  }
-
-  size_type approx_size() const noexcept {
-    return size_.load(std::memory_order_relaxed);
-  }
-
-  bool empty() const noexcept {
-    return !valid() || (approx_size() == 0);
-  }
+  using base_t::base_t;
 
   template <typename U>
   bool push(U &&value) noexcept {
-    if (!valid()) return false;
-    if (!data_->model_.enqueue(data_->elements(), data_->header_, context_, std::forward<U>(value))) {
-      return false;
-    }
-    size_.fetch_add(1, std::memory_order_relaxed);
-    return true;
+    return this->enqueue(std::forward<U>(value));
   }
 
-  bool pop(value_type &value) noexcept {
-    if (!valid()) return false;
-    if (!data_->model_.dequeue(data_->elements(), data_->header_, context_, value)) {
-      return false;
-    }
-    size_.fetch_sub(1, std::memory_order_relaxed);
-    return true;
+  bool pop(typename base_t::value_type &value) noexcept {
+    return this->dequeue(value);
   }
 };
 
diff --git a/test/concur/test_concur_bus.cpp b/test/concur/test_concur_bus.cpp
index 87776ec1..b2933df7 100644
--- a/test/concur/test_concur_bus.cpp
+++ b/test/concur/test_concur_bus.cpp
@@ -2,3 +2,7 @@
 #include "gtest/gtest.h"
 
 #include "libconcur/bus.h"
+#include "libimp/span.h"
+
+TEST(bus, construct) {
+}
\ No newline at end of file

From 2df08237a442a473d864527c668d4fbfaabd0046 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 4 Jun 2023 17:10:50 +0800
Subject: [PATCH 184/272] add: (linux) some performance tests for the system
 ipc

---
 benchmark/benchmark_concur.cpp |  26 +++-
 benchmark/benchmark_ipc.cpp    | 263 +++++++++++++++++++++++++++++++++
 test/ipc/test_ipc_shm.cpp      |  60 +++++++-
 test/test_util.h               |  34 +++++
 4 files changed, 381 insertions(+), 2 deletions(-)
 create mode 100644 benchmark/benchmark_ipc.cpp
 create mode 100644 test/test_util.h

diff --git a/benchmark/benchmark_concur.cpp b/benchmark/benchmark_concur.cpp
index 712db08a..24c6331b 100644
--- a/benchmark/benchmark_concur.cpp
+++ b/benchmark/benchmark_concur.cpp
@@ -10,6 +10,29 @@
 
 namespace {
 
+void concur_queue_rtt(benchmark::State &state) {
+  using namespace concur;
+  queue<std::int64_t, relation::single, relation::single> que [2];
+  std::atomic_bool stop = false;
+  auto producer = std::async(std::launch::async, [&stop, &que] {
+    for (std::int64_t i = 0; !stop.load(std::memory_order_relaxed); ++i) {
+      std::int64_t n {};
+      while (!que[0].pop(n)) ;
+      (void)que[1].push(i);
+    }
+  });
+
+  for (auto _ : state) {
+    (void)que[0].push(0);
+    std::int64_t n {};
+    while (!que[1].pop(n)) ;
+  }
+
+  stop = true;
+  (void)que[0].push(0);
+  producer.wait();
+}
+
 void concur_queue_1v1(benchmark::State &state) {
   using namespace concur;
   queue<std::int64_t, relation::single, relation::single> que;
@@ -62,5 +85,6 @@ void concur_queue_NvN(benchmark::State &state) {
 
 } // namespace
 
+BENCHMARK(concur_queue_rtt);
 BENCHMARK(concur_queue_1v1);
-BENCHMARK(concur_queue_NvN)->ThreadRange(1, 16);
\ No newline at end of file
+BENCHMARK(concur_queue_NvN)->ThreadRange(1, 16);
diff --git a/benchmark/benchmark_ipc.cpp b/benchmark/benchmark_ipc.cpp
new file mode 100644
index 00000000..5d7a6983
--- /dev/null
+++ b/benchmark/benchmark_ipc.cpp
@@ -0,0 +1,263 @@
+
+#include <sys/eventfd.h>
+#include <sys/syscall.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+
+#include <string.h>
+#include <fcntl.h>
+#include <mqueue.h>
+
+#include <atomic>
+
+#include "benchmark/benchmark.h"
+
+#include "test_util.h"
+
+#include "libipc/shm.h"
+
+namespace {
+
+using flag_t = std::atomic_bool;
+
+struct eventfd_reader {
+  pid_t pid_ {-1};
+  int   rfd_ {eventfd(0, 0/*EFD_CLOEXEC*/)};
+  int   wfd_ {eventfd(0, 0/*EFD_CLOEXEC*/)};
+
+  eventfd_reader() {
+    auto shm = ipc::shared_memory("shm-eventfd_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(false, std::memory_order_relaxed);
+    pid_ = test::subproc([this] {
+      auto shm = ipc::shared_memory("shm-eventfd_reader", sizeof(flag_t));
+      auto flag = shm.as<flag_t>();
+      printf("eventfd_reader rfd = %d, wfd = %d\n", rfd_, wfd_);
+      while (!flag->load(std::memory_order_relaxed)) {
+        uint64_t n = 0;
+        read(wfd_, &n, sizeof(uint64_t));
+        n = 1;
+        write(rfd_, &n, sizeof(uint64_t));
+      }
+      printf("eventfd_reader exit.\n");
+    });
+  }
+
+  ~eventfd_reader() {
+    auto shm = ipc::shared_memory("shm-eventfd_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    uint64_t n = 1;
+    write(wfd_, &n, sizeof(uint64_t));
+    test::join_subproc(pid_);
+    close(rfd_);
+    close(wfd_);
+  }
+} evtfd_r__;
+
+struct mqueue_reader {
+  pid_t pid_ {-1};
+
+  mqueue_reader() {
+    auto shm = ipc::shared_memory("shm-mqueue_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(false, std::memory_order_relaxed);
+
+    pid_ = test::subproc([this] {
+      auto shm = ipc::shared_memory("shm-mqueue_reader", sizeof(flag_t));
+      auto flag = shm.as<flag_t>();
+      printf("mqueue_reader start.\n");
+      mqd_t wfd = mq_open("/mqueue-wfd", O_RDONLY);
+      mqd_t rfd = mq_open("/mqueue-rfd", O_WRONLY);
+      while (!flag->load(std::memory_order_relaxed)) {
+        char n {};
+        // read
+        mq_receive(wfd, &n, sizeof(n), nullptr);
+        // write
+        mq_send(rfd, &n, sizeof(n), 0);
+      }
+      printf("mqueue_reader exit.\n");
+      mq_close(wfd);
+      mq_close(rfd);
+    });
+  }
+
+  ~mqueue_reader() {
+    auto shm = ipc::shared_memory("shm-mqueue_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    {
+      mqd_t wfd = mq_open("/mqueue-wfd", O_WRONLY);
+      char n {};
+      mq_send(wfd, &n, sizeof(n), 0);
+      mq_close(wfd);
+    }
+    test::join_subproc(pid_);
+  }
+} mq_r__;
+
+struct sock_reader {
+  pid_t pid_ {-1};
+
+  sock_reader() {
+    auto shm = ipc::shared_memory("shm-sock_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(false, std::memory_order_relaxed);
+
+    pid_ = test::subproc([this] {
+      auto shm = ipc::shared_memory("shm-sock_reader", sizeof(flag_t));
+      auto flag = shm.as<flag_t>();
+      printf("sock_reader start.\n");
+      int lfd = socket(AF_UNIX, SOCK_STREAM, 0);
+      struct sockaddr_un serun {};
+      serun.sun_family = AF_UNIX;
+      strcpy(serun.sun_path, "shm-sock.ser");
+      unlink(serun.sun_path);
+      bind(lfd, (struct sockaddr *)&serun, offsetof(struct sockaddr_un, sun_path) + strlen(serun.sun_path));
+      listen(lfd, 16);
+      while (!flag->load(std::memory_order_relaxed)) {
+        struct sockaddr_un cliun {};
+        socklen_t cliun_len = sizeof(cliun);
+        int cfd = accept(lfd, (struct sockaddr *)&cliun, &cliun_len);
+        if (cfd < 0) {
+          printf("accept error.\n");
+          continue;
+        }
+        while (!flag->load(std::memory_order_relaxed)) {
+          char c {};
+          auto r = read(cfd, &c, sizeof(c));
+          if (r <= 0) break;
+          write(cfd, &c, sizeof(c));
+        }
+        close(cfd);
+      }
+      printf("sock_reader exit.\n");
+    });
+  }
+
+  ~sock_reader() {
+    auto shm = ipc::shared_memory("shm-sock_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    {
+      auto sfd = start_client();
+      char c {};
+      write(sfd, &c, sizeof(c));
+      close(sfd);
+    }
+    test::join_subproc(pid_);
+  }
+
+  int start_client() {
+    int sfd = socket(AF_UNIX, SOCK_STREAM, 0);
+    struct sockaddr_un cliun {};
+    cliun.sun_family = AF_UNIX;
+    strcpy(cliun.sun_path, "shm-sock.cli");
+    unlink(cliun.sun_path);
+    bind(sfd, (struct sockaddr *)&cliun, offsetof(struct sockaddr_un, sun_path) + strlen(cliun.sun_path));
+    struct sockaddr_un serun {};
+    serun.sun_family = AF_UNIX;
+    strcpy(serun.sun_path, "shm-sock.ser");
+    connect(sfd, (struct sockaddr *)&serun, offsetof(struct sockaddr_un, sun_path) + strlen(serun.sun_path));
+    return sfd;
+  }
+} sock_r__;
+
+struct udp_reader {
+  pid_t pid_ {-1};
+
+  udp_reader() {
+    auto shm = ipc::shared_memory("shm-udp_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(false, std::memory_order_relaxed);
+
+    pid_ = test::subproc([this] {
+      auto shm = ipc::shared_memory("shm-udp_reader", sizeof(flag_t));
+      auto flag = shm.as<flag_t>();
+      printf("udp_reader start.\n");
+      int lfd = socket(AF_INET, SOCK_DGRAM, 0);
+      struct sockaddr_in ser {};
+      ser.sin_family = AF_INET;
+      ser.sin_addr.s_addr = htonl(INADDR_ANY);
+      ser.sin_port = htons(8888);
+      bind(lfd, (struct sockaddr *)&ser, sizeof(ser));
+      while (!flag->load(std::memory_order_relaxed)) {
+        struct sockaddr_in cli {};
+        socklen_t cli_len = sizeof(cli);
+        char c {};
+        recvfrom(lfd, &c, sizeof(c), 0, (struct sockaddr *)&cli, &cli_len);
+        sendto(lfd, &c, sizeof(c), 0, (struct sockaddr *)&cli, cli_len);
+      }
+      printf("udp_reader exit.\n");
+    });
+  }
+
+  ~udp_reader() {
+    auto shm = ipc::shared_memory("shm-udp_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    {
+      auto sfd = socket(AF_INET, SOCK_DGRAM, 0);
+      struct sockaddr_in ser {};
+      ser.sin_family = AF_INET;
+      ser.sin_addr.s_addr = htonl(INADDR_ANY);
+      ser.sin_port = htons(8888);
+      char c {};
+      sendto(sfd, &c, sizeof(c), 0, (struct sockaddr *)&ser, sizeof(ser));
+      close(sfd);
+    }
+    test::join_subproc(pid_);
+  }
+} udp_r__;
+
+void ipc_eventfd_rtt(benchmark::State &state) {
+  for (auto _ : state) {
+    uint64_t n = 1;
+    write(evtfd_r__.wfd_, &n, sizeof(n));
+    read (evtfd_r__.rfd_, &n, sizeof(n));
+  }
+}
+
+void ipc_mqueue_rtt(benchmark::State &state) {
+  mqd_t wfd = mq_open("/mqueue-wfd", O_WRONLY);
+  mqd_t rfd = mq_open("/mqueue-rfd", O_RDONLY);
+  for (auto _ : state) {
+    char n {};
+    // write
+    mq_send(wfd, &n, sizeof(n), 0);
+    // read
+    mq_receive(rfd, &n, sizeof(n), nullptr);
+  }
+  mq_close(wfd);
+  mq_close(rfd);
+}
+
+void ipc_sock_rtt(benchmark::State &state) {
+  auto sfd = sock_r__.start_client();
+  for (auto _ : state) {
+    char n {};
+    write(sfd, &n, sizeof(n));
+    read (sfd, &n, sizeof(n));
+  }
+  close(sfd);
+}
+
+void ipc_udp_rtt(benchmark::State &state) {
+  auto sfd = socket(AF_INET, SOCK_DGRAM, 0);
+  struct sockaddr_in ser {};
+  ser.sin_family = AF_INET;
+  ser.sin_addr.s_addr = htonl(INADDR_ANY);
+  ser.sin_port = htons(8888);
+  for (auto _ : state) {
+    char n {'A'};
+    // write
+    sendto(sfd, &n, sizeof(n), 0, (struct sockaddr *)&ser, sizeof(ser));
+    // read
+    struct sockaddr_in cli {};
+    socklen_t len = sizeof(cli);
+    recvfrom(sfd, &n, sizeof(n), 0, (struct sockaddr *)&cli, &len);
+  }
+  close(sfd);
+}
+
+} // namespace
+
+BENCHMARK(ipc_eventfd_rtt);
+BENCHMARK(ipc_mqueue_rtt);
+BENCHMARK(ipc_sock_rtt);
+BENCHMARK(ipc_udp_rtt);
diff --git a/test/ipc/test_ipc_shm.cpp b/test/ipc/test_ipc_shm.cpp
index 99f7aac7..de8cb5de 100644
--- a/test/ipc/test_ipc_shm.cpp
+++ b/test/ipc/test_ipc_shm.cpp
@@ -74,4 +74,62 @@ TEST(shm, shared_memory) {
   EXPECT_EQ(*shm.as<int>(), 4444);
 
   EXPECT_TRUE(ipc::shm_close(*shm_r));
-}
\ No newline at end of file
+}
+
+#if 0
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <string.h>
+
+#include "test_util.h"
+
+TEST(shm, sock) {
+  auto reader = test::subproc([] {
+    int lfd = socket(AF_INET, SOCK_DGRAM, 0);
+    struct sockaddr_in ser {};
+    ser.sin_family = AF_INET;
+    ser.sin_addr.s_addr = htonl(INADDR_ANY);
+    ser.sin_port = htons(8888);
+    bind(lfd, (struct sockaddr *)&ser, sizeof(ser));
+    printf("reader prepared...\n");
+    struct sockaddr_in cli {};
+    socklen_t cli_len = sizeof(cli);
+    char c {'\0'};
+    printf("reading...\n");
+    for (;;) {
+      recvfrom(lfd, &c, sizeof(c), 0, (struct sockaddr *)&cli, &cli_len);
+      printf("read %c\n", c);
+      sendto(lfd, &c, sizeof(c), 0, (struct sockaddr *)&cli, cli_len);
+      if (c == 'Z') break;
+    }
+    close(lfd);
+  });
+
+  auto writer = test::subproc([] {
+    int sfd = socket(AF_INET, SOCK_DGRAM, 0);
+    struct sockaddr_in ser {};
+    ser.sin_family = AF_INET;
+    ser.sin_addr.s_addr = htonl(INADDR_ANY);
+    ser.sin_port = htons(8888);
+
+    printf("writer prepared...\n");
+    sleep(1);
+
+    for (char c = 'A'; c <= 'Z'; ++c) {
+      printf("write %c\n", c);
+      sendto(sfd, &c, sizeof(c), 0, (struct sockaddr *)&ser, sizeof(ser));
+      struct sockaddr_in cli {};
+      socklen_t len = sizeof(cli);
+      char n {};
+      recvfrom(sfd, &n, sizeof(n), 0, (struct sockaddr *)&cli, &len);
+      printf("echo %c\n", c);
+    }
+    close(sfd);
+  });
+
+  test::join_subproc(writer);
+  test::join_subproc(reader);
+}
+#endif
\ No newline at end of file
diff --git a/test/test_util.h b/test/test_util.h
new file mode 100644
index 00000000..a55a128d
--- /dev/null
+++ b/test/test_util.h
@@ -0,0 +1,34 @@
+
+#pragma once
+
+#include <sys/wait.h>
+#include <unistd.h>
+
+namespace test {
+
+template <typename Fn>
+pid_t subproc(Fn&& fn) {
+  pid_t pid = fork();
+  if (pid == -1) {
+    return pid;
+  }
+  if (!pid) {
+    // Unhook doctest from the subprocess.
+    // Otherwise, we would see a test-failure printout after the crash.
+    signal(SIGABRT, SIG_DFL);
+    signal(SIGSEGV, SIG_DFL);
+    fn();
+    exit(0);
+  }
+  return pid;
+}
+
+inline void join_subproc(pid_t pid) {
+  int ret_code;
+  waitpid(pid, &ret_code, 0);
+}
+
+} // namespace test
+
+#define REQUIRE_EXIT(...) \
+  test::join_subproc(test::subproc([&]() __VA_ARGS__))

From f00e11699edea8c7c9a707b11fc497097086c741 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 4 Jun 2023 18:17:36 +0800
Subject: [PATCH 185/272] add: (linux) benchmark for named pipe

---
 benchmark/benchmark_ipc.cpp | 57 +++++++++++++++++++++++++++
 test/ipc/test_ipc_shm.cpp   | 78 ++++++++++++++++++-------------------
 2 files changed, 96 insertions(+), 39 deletions(-)

diff --git a/benchmark/benchmark_ipc.cpp b/benchmark/benchmark_ipc.cpp
index 5d7a6983..44153121 100644
--- a/benchmark/benchmark_ipc.cpp
+++ b/benchmark/benchmark_ipc.cpp
@@ -8,6 +8,7 @@
 #include <netinet/in.h>
 
 #include <string.h>
+#include <unistd.h>
 #include <fcntl.h>
 #include <mqueue.h>
 
@@ -95,6 +96,47 @@ struct mqueue_reader {
   }
 } mq_r__;
 
+struct pipe_reader {
+  pid_t pid_ {-1};
+
+  pipe_reader() {
+    auto shm = ipc::shared_memory("shm-pipe_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(false, std::memory_order_relaxed);
+
+    pid_ = test::subproc([this] {
+      auto shm = ipc::shared_memory("shm-pipe_reader", sizeof(flag_t));
+      auto flag = shm.as<flag_t>();
+      printf("pipe_reader start.\n");
+      mkfifo("/tmp/shm-pipe.w", S_IFIFO|0666);
+      mkfifo("/tmp/shm-pipe.r", S_IFIFO|0666);
+      int wfd = open("/tmp/shm-pipe.w", O_RDWR);
+      int rfd = open("/tmp/shm-pipe.r", O_RDWR);
+      while (!flag->load(std::memory_order_relaxed)) {
+        char n {};
+        // read
+        read(wfd, &n, sizeof(n));
+        // write
+        write(rfd, &n, sizeof(n));
+      }
+      printf("pipe_reader exit.\n");
+      close(wfd);
+      close(rfd);
+    });
+  }
+
+  ~pipe_reader() {
+    auto shm = ipc::shared_memory("shm-pipe_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    {
+      mqd_t wfd = open("/tmp/shm-pipe.w", O_WRONLY);
+      char n {};
+      write(wfd, &n, sizeof(n));
+      close(wfd);
+    }
+    test::join_subproc(pid_);
+  }
+} pipe_r__;
+
 struct sock_reader {
   pid_t pid_ {-1};
 
@@ -227,6 +269,20 @@ void ipc_mqueue_rtt(benchmark::State &state) {
   mq_close(rfd);
 }
 
+void ipc_npipe_rtt(benchmark::State &state) {
+  int wfd = open("/tmp/shm-pipe.w", O_WRONLY);
+  int rfd = open("/tmp/shm-pipe.r", O_RDONLY);
+  for (auto _ : state) {
+    char n {};
+    // write
+    write(wfd, &n, sizeof(n));
+    // read
+    read(rfd, &n, sizeof(n));
+  }
+  close(wfd);
+  close(rfd);
+}
+
 void ipc_sock_rtt(benchmark::State &state) {
   auto sfd = sock_r__.start_client();
   for (auto _ : state) {
@@ -259,5 +315,6 @@ void ipc_udp_rtt(benchmark::State &state) {
 
 BENCHMARK(ipc_eventfd_rtt);
 BENCHMARK(ipc_mqueue_rtt);
+BENCHMARK(ipc_npipe_rtt);
 BENCHMARK(ipc_sock_rtt);
 BENCHMARK(ipc_udp_rtt);
diff --git a/test/ipc/test_ipc_shm.cpp b/test/ipc/test_ipc_shm.cpp
index de8cb5de..6449431a 100644
--- a/test/ipc/test_ipc_shm.cpp
+++ b/test/ipc/test_ipc_shm.cpp
@@ -80,56 +80,56 @@ TEST(shm, shared_memory) {
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 #include <netinet/in.h>
 #include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
 
 #include "test_util.h"
 
-TEST(shm, sock) {
-  auto reader = test::subproc([] {
-    int lfd = socket(AF_INET, SOCK_DGRAM, 0);
-    struct sockaddr_in ser {};
-    ser.sin_family = AF_INET;
-    ser.sin_addr.s_addr = htonl(INADDR_ANY);
-    ser.sin_port = htons(8888);
-    bind(lfd, (struct sockaddr *)&ser, sizeof(ser));
-    printf("reader prepared...\n");
-    struct sockaddr_in cli {};
-    socklen_t cli_len = sizeof(cli);
-    char c {'\0'};
-    printf("reading...\n");
-    for (;;) {
-      recvfrom(lfd, &c, sizeof(c), 0, (struct sockaddr *)&cli, &cli_len);
-      printf("read %c\n", c);
-      sendto(lfd, &c, sizeof(c), 0, (struct sockaddr *)&cli, cli_len);
-      if (c == 'Z') break;
-    }
-    close(lfd);
-  });
-
+TEST(shm, pipe) {
   auto writer = test::subproc([] {
-    int sfd = socket(AF_INET, SOCK_DGRAM, 0);
-    struct sockaddr_in ser {};
-    ser.sin_family = AF_INET;
-    ser.sin_addr.s_addr = htonl(INADDR_ANY);
-    ser.sin_port = htons(8888);
-
+    mkfifo("/tmp/shm-pipe.w", S_IFIFO|0666);
+    // mkfifo("/tmp/shm-pipe.r", S_IFIFO|0666);
+    int wfd = open("/tmp/shm-pipe.w", O_WRONLY);
+    // int rfd = open("/tmp/shm-pipe.r", O_RDONLY);
     printf("writer prepared...\n");
-    sleep(1);
-
     for (char c = 'A'; c <= 'Z'; ++c) {
-      printf("write %c\n", c);
-      sendto(sfd, &c, sizeof(c), 0, (struct sockaddr *)&ser, sizeof(ser));
-      struct sockaddr_in cli {};
-      socklen_t len = sizeof(cli);
-      char n {};
-      recvfrom(sfd, &n, sizeof(n), 0, (struct sockaddr *)&cli, &len);
-      printf("echo %c\n", c);
+      sleep(1);
+      printf("\nwrite %c\n", c);
+      write(wfd, &c, sizeof(c));
+      // char n {};
+      // read(rfd, &n, sizeof(n));
+      // printf("write echo %c\n", n);
     }
-    close(sfd);
+    close(wfd);
+    // close(rfd);
   });
 
+  auto reader_maker = [](int k) {
+    return [k] {
+      printf("r%d prepared...\n", k);
+      sleep(1);
+      int wfd = open("/tmp/shm-pipe.w", O_RDONLY);
+      // int rfd = open("/tmp/shm-pipe.r", O_WRONLY);
+      for (;;) {
+        char n {};
+        read(wfd, &n, sizeof(n));
+        printf("r%d %c\n", k, n);
+        // write(rfd, &n, sizeof(n));
+        if (n == 'Z') break;
+      }
+      close(wfd);
+      // close(rfd);
+    };
+  };
+
+  auto r1 = test::subproc(reader_maker(1));
+  auto r2 = test::subproc(reader_maker(2));
+
   test::join_subproc(writer);
-  test::join_subproc(reader);
+  test::join_subproc(r1);
+  test::join_subproc(r2);
 }
 #endif
\ No newline at end of file

From 8b12e1fefb181f02393b6dee6c4ef72e2b858144 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 9 Jul 2023 18:47:43 +0800
Subject: [PATCH 186/272] add: (linux) benchmark for inotify

---
 benchmark/benchmark_ipc.cpp | 83 +++++++++++++++++++++++++++++++++++++
 test/ipc/test_ipc_shm.cpp   | 47 ++++++++++++++++++++-
 2 files changed, 129 insertions(+), 1 deletion(-)

diff --git a/benchmark/benchmark_ipc.cpp b/benchmark/benchmark_ipc.cpp
index 44153121..066f93cf 100644
--- a/benchmark/benchmark_ipc.cpp
+++ b/benchmark/benchmark_ipc.cpp
@@ -5,12 +5,14 @@
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <sys/types.h>
+#include <sys/inotify.h>
 #include <netinet/in.h>
 
 #include <string.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <mqueue.h>
+#include <stdio.h>
 
 #include <atomic>
 
@@ -247,6 +249,60 @@ struct udp_reader {
   }
 } udp_r__;
 
+struct inotify_reader {
+  pid_t pid_ {-1};
+
+  inotify_reader() {
+    auto shm = ipc::shared_memory("shm-inotify_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(false, std::memory_order_relaxed);
+    fclose(fopen("/tmp/shm-inotify.0", "w"));
+    fclose(fopen("/tmp/shm-inotify.1", "w"));
+    pid_ = test::subproc([this] {
+      auto shm  = ipc::shared_memory("shm-inotify_reader", sizeof(flag_t));
+      auto flag = shm.as<flag_t>();
+      auto shm_rt = ipc::shared_memory("shm-inotify_reader.0", sizeof(flag_t));
+      auto shm_wt = ipc::shared_memory("shm-inotify_reader.1", sizeof(flag_t));
+      auto f_rt = shm_rt.as<flag_t>();
+      auto f_wt = shm_wt.as<flag_t>();
+      int ifd = inotify_init();
+      int iwd = inotify_add_watch(ifd, "/tmp/shm-inotify.0", IN_OPEN | IN_CLOSE);
+      // auto wf = fopen("/tmp/shm-inotify.1", "w");
+      printf("inotify_reader start.\n");
+      while (!flag->load(std::memory_order_relaxed)) {
+        // read
+        if (!f_rt->exchange(false, std::memory_order_acquire)) {
+          struct inotify_event e {};
+          read(ifd, &e, sizeof(e));
+        }
+        // write
+        f_wt->store(true, std::memory_order_release);
+        fclose(fopen("/tmp/shm-inotify.1", "r"));
+        // char c {'A'};
+        // fwrite(&c, 1, 1, wf);
+        // fflush(wf);
+      }
+      // fclose(wf);
+      inotify_rm_watch(ifd, iwd);
+      close(ifd);
+      printf("inotify_reader exit.\n");
+    });
+  }
+
+  ~inotify_reader() {
+    auto shm = ipc::shared_memory("shm-inotify_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    auto shm_rt = ipc::shared_memory("shm-inotify_reader.0", sizeof(flag_t));
+    shm_rt.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    fclose(fopen("/tmp/shm-inotify.0", "r"));
+    // auto rf = fopen("/tmp/shm-inotify.0", "w");
+    // char c {'A'};
+    // fwrite(&c, 1, 1, rf);
+    // fflush(rf);
+    // fclose(rf);
+    test::join_subproc(pid_);
+  }
+} inotify_r__;
+
 void ipc_eventfd_rtt(benchmark::State &state) {
   for (auto _ : state) {
     uint64_t n = 1;
@@ -311,6 +367,32 @@ void ipc_udp_rtt(benchmark::State &state) {
   close(sfd);
 }
 
+void ipc_inotify_rtt(benchmark::State &state) {
+  auto shm_rt = ipc::shared_memory("shm-inotify_reader.0", sizeof(flag_t));
+  auto shm_wt = ipc::shared_memory("shm-inotify_reader.1", sizeof(flag_t));
+  auto f_rt = shm_rt.as<flag_t>();
+  auto f_wt = shm_wt.as<flag_t>();
+  int ifd = inotify_init();
+  int iwd = inotify_add_watch(ifd, "/tmp/shm-inotify.1", IN_OPEN | IN_CLOSE);
+  // auto rf = fopen("/tmp/shm-inotify.0", "w");
+  for (auto _ : state) {
+    // write
+    f_rt->store(true, std::memory_order_release);
+    fclose(fopen("/tmp/shm-inotify.0", "r"));
+    // char c {'A'};
+    // fwrite(&c, 1, 1, rf);
+    // fflush(rf);
+    // read
+    if (!f_wt->exchange(false, std::memory_order_acquire)) {
+      struct inotify_event e {};
+      read(ifd, &e, sizeof(e));
+    }
+  }
+  // fclose(rf);
+  inotify_rm_watch(ifd, iwd);
+  close(ifd);
+}
+
 } // namespace
 
 BENCHMARK(ipc_eventfd_rtt);
@@ -318,3 +400,4 @@ BENCHMARK(ipc_mqueue_rtt);
 BENCHMARK(ipc_npipe_rtt);
 BENCHMARK(ipc_sock_rtt);
 BENCHMARK(ipc_udp_rtt);
+BENCHMARK(ipc_inotify_rtt);
diff --git a/test/ipc/test_ipc_shm.cpp b/test/ipc/test_ipc_shm.cpp
index 6449431a..c7fcd90a 100644
--- a/test/ipc/test_ipc_shm.cpp
+++ b/test/ipc/test_ipc_shm.cpp
@@ -76,7 +76,9 @@ TEST(shm, shared_memory) {
   EXPECT_TRUE(ipc::shm_close(*shm_r));
 }
 
-#if 0
+#include <libimp/detect_plat.h>
+
+#if defined(LIBIMP_OS_LINUX)
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <sys/types.h>
@@ -132,4 +134,47 @@ TEST(shm, pipe) {
   test::join_subproc(r1);
   test::join_subproc(r2);
 }
+
+#include <sys/inotify.h>
+#include <stdio.h>
+
+TEST(shm, event) {
+  fclose(fopen("/tmp/shm-event", "w"));
+
+  auto sender = test::subproc([] {
+    printf("sender prepared...\n");
+    auto fd = fopen("/tmp/shm-event", "w");
+    for (int i = 0; i < 10; ++i) {
+      sleep(1);
+      printf("\nwrite %d\n", i);
+      char c {'A'};
+      fwrite(&c, 1, 1, fd);
+      fflush(fd);
+    }
+    fclose(fd);
+  });
+
+  auto reader_maker = [](int k) {
+    return [k] {
+      printf("r%d prepared...\n", k);
+      sleep(1);
+      int ifd = inotify_init();
+      int iwd = inotify_add_watch(ifd, "/tmp/shm-event", IN_MODIFY);
+      for (int i = 0; i < 10; ++i) {
+        struct inotify_event e {};
+        read(ifd, &e, sizeof(e));
+        printf("r%d %u\n", k, e.mask);
+      }
+      inotify_rm_watch(ifd, iwd);
+      close(ifd);
+    };
+  };
+
+  auto r1 = test::subproc(reader_maker(1));
+  auto r2 = test::subproc(reader_maker(2));
+
+  test::join_subproc(sender);
+  test::join_subproc(r1);
+  test::join_subproc(r2);
+}
 #endif
\ No newline at end of file

From 746ee5158493cbb64911fc434cd1f7ddb963df8f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 23 Jul 2023 18:28:55 +0800
Subject: [PATCH 187/272] fix: benchmark in linux

---
 benchmark/benchmark_ipc.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/benchmark/benchmark_ipc.cpp b/benchmark/benchmark_ipc.cpp
index 066f93cf..8f31013c 100644
--- a/benchmark/benchmark_ipc.cpp
+++ b/benchmark/benchmark_ipc.cpp
@@ -1,3 +1,5 @@
+#include <libimp/detect_plat.h>
+#if defined(LIBIMP_OS_LINUX)
 
 #include <sys/eventfd.h>
 #include <sys/syscall.h>
@@ -20,7 +22,7 @@
 
 #include "test_util.h"
 
-#include "libipc/shm.h"
+#include <libipc/shm.h>
 
 namespace {
 
@@ -401,3 +403,4 @@ BENCHMARK(ipc_npipe_rtt);
 BENCHMARK(ipc_sock_rtt);
 BENCHMARK(ipc_udp_rtt);
 BENCHMARK(ipc_inotify_rtt);
+#endif
\ No newline at end of file

From f657fd1c7ea6c104b1bb4f6febfb0469f127b4f6 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 23 Jul 2023 18:33:44 +0800
Subject: [PATCH 188/272] upd: [ipc] optimizes the return value of shm_close

---
 include/libimp/error.h               |  1 +
 include/libipc/shm.h                 | 14 +++++++-------
 src/libipc/platform/posix/shm_impl.h |  4 ++--
 src/libipc/platform/win/mmap_impl.h  |  6 +++---
 src/libipc/platform/win/shm_impl.h   |  2 +-
 test/ipc/test_ipc_shm.cpp            |  3 +--
 6 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/include/libimp/error.h b/include/libimp/error.h
index 351ae66e..6a5e67bb 100644
--- a/include/libimp/error.h
+++ b/include/libimp/error.h
@@ -17,6 +17,7 @@ LIBIMP_NAMESPACE_BEG_
 
 using error_code_t = std::uint64_t;
 constexpr error_code_t error_number_limit = error_code_t(-1);
+constexpr error_code_t no_error = 0;
 
 /**
  * \brief Serves as the base class for specific error category types.
diff --git a/include/libipc/shm.h b/include/libipc/shm.h
index 9e05b36a..93206541 100644
--- a/include/libipc/shm.h
+++ b/include/libipc/shm.h
@@ -21,11 +21,15 @@ using shm_t = shm_handle *;
 
 /// \brief Create a new shared memory handle with a name of the shared memory file.
 LIBIMP_EXPORT ::LIBIMP::result<shm_t> shm_open(std::string name, 
-                                                std::size_t size = 0,
-                                                mode::type = mode::create | mode::open) noexcept;
+                                               std::size_t size = 0,
+                                               mode::type = mode::create | mode::open) noexcept;
 
 /// \brief Close the shared memory handle.
-LIBIMP_EXPORT ::LIBIMP::result_code shm_close(shm_t) noexcept;
+LIBIMP_EXPORT ::LIBIMP::result<void> shm_close(shm_t) noexcept;
+
+/// \brief Gets the name of the shared memory file based on the shared memory handle.
+/// \return empty string on failure.
+LIBIMP_EXPORT std::string shm_name(shm_t) noexcept;
 
 /// \brief Gets a memory pointer based on the shared memory handle.
 /// \return nullptr on failure.
@@ -39,10 +43,6 @@ LIBIMP_EXPORT std::size_t shm_size(shm_t) noexcept;
 /// \remark [TBD]
 LIBIMP_EXPORT ::LIBIMP::result_code shm_size(shm_t, std::size_t) noexcept;
 
-/// \brief Gets the name of the shared memory file based on the shared memory handle.
-/// \return empty string on failure.
-LIBIMP_EXPORT std::string shm_name(shm_t) noexcept;
-
 /**
  * \brief The shared memory object.
  */
diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
index 2d65c47d..60f302cd 100644
--- a/src/libipc/platform/posix/shm_impl.h
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -150,7 +150,7 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
 /**
  * \see https://man7.org/linux/man-pages/man2/mmap.2.html
  */
-result_code shm_close(shm_t h) noexcept {
+result<void> shm_close(shm_t h) noexcept {
   LIBIMP_LOG_();
   auto shm = valid(h);
   if (shm == nullptr) return {};
@@ -161,7 +161,7 @@ result_code shm_close(shm_t h) noexcept {
   }
   /// \brief no unlink the file.
   delete shm;
-  return posix::succ;
+  return no_error;
 }
 
 LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index e1db4424..9a5b78dd 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -33,7 +33,7 @@ namespace {
  * \brief Closes an open object handle.
  * \see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
  */
-result_code mmap_close(HANDLE h) {
+result<void> mmap_close(HANDLE h) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
@@ -44,7 +44,7 @@ result_code mmap_close(HANDLE h) {
     log.error("failed: CloseHandle(", h, "). error = ", err);
     return err;
   }
-  return ERROR_SUCCESS;
+  return no_error;
 }
 
 /**
@@ -161,7 +161,7 @@ result<SIZE_T> mmap_sizeof(LPCVOID mem) {
  * \brief Unmaps a mapped view of a file from the calling process's address space.
  * \see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-unmapviewoffile
  */
-result_code mmap_release(HANDLE h, LPCVOID mem) {
+result<void> mmap_release(HANDLE h, LPCVOID mem) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index 537b984b..deec8f38 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -39,7 +39,7 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   return new shm_handle{std::move(name), *sz, *mem, *h};
 }
 
-result_code shm_close(shm_t h) noexcept {
+result<void> shm_close(shm_t h) noexcept {
   LIBIMP_LOG_();
   if (h == nullptr) {
     log.error("shm handle is null.");
diff --git a/test/ipc/test_ipc_shm.cpp b/test/ipc/test_ipc_shm.cpp
index c7fcd90a..4b23aaa9 100644
--- a/test/ipc/test_ipc_shm.cpp
+++ b/test/ipc/test_ipc_shm.cpp
@@ -3,7 +3,7 @@
 
 #include "libipc/shm.h"
 
-TEST(shm, create_close) {
+TEST(shm, open_close) {
   EXPECT_FALSE(ipc::shm_open("hello-ipc-shm", 1024, ipc::mode::none));
 
   auto shm1 = ipc::shm_open("hello-ipc-shm", 1024, ipc::mode::create | ipc::mode::open);
@@ -77,7 +77,6 @@ TEST(shm, shared_memory) {
 }
 
 #include <libimp/detect_plat.h>
-
 #if defined(LIBIMP_OS_LINUX)
 #include <sys/socket.h>
 #include <sys/un.h>

From 5dc436e04719364a9c1f8f8c02d505d7bbebd2d0 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 23 Jul 2023 18:44:01 +0800
Subject: [PATCH 189/272] add: [ipc] operation declaration for event object

---
 include/libipc/event.h      | 46 +++++++++++++++++++++++++++++++++++++
 test/ipc/test_ipc_event.cpp |  7 ++++++
 2 files changed, 53 insertions(+)
 create mode 100644 include/libipc/event.h
 create mode 100644 test/ipc/test_ipc_event.cpp

diff --git a/include/libipc/event.h b/include/libipc/event.h
new file mode 100644
index 00000000..005d984a
--- /dev/null
+++ b/include/libipc/event.h
@@ -0,0 +1,46 @@
+/**
+ * \file libipc/event.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Defines event objects for cross-process communication.
+ */
+#pragma once
+
+#include <string>
+#include <cstdint>
+
+#include "libimp/export.h"
+#include "libimp/result.h"
+#include "libimp/span.h"
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+struct evt_handle;
+using evt_t = evt_handle *;
+
+/// \brief Create a new event object with a name.
+LIBIMP_EXPORT ::LIBIMP::result<evt_t> evt_open(std::string name) noexcept;
+
+/// \brief Close the event object.
+LIBIMP_EXPORT ::LIBIMP::result<void> evt_close(evt_t) noexcept;
+
+/// \brief Gets the name of the event object based on the event handle.
+/// \return empty string on failure.
+LIBIMP_EXPORT std::string evt_name(evt_t) noexcept;
+
+/// \brief Sets the event object to the signaled state.
+LIBIMP_EXPORT ::LIBIMP::result<void> evt_set(evt_t) noexcept;
+
+/// \brief Waits until one of the specified event objects is in the signaled state.
+LIBIMP_EXPORT ::LIBIMP::result<bool> evt_wait(evt_t, std::int64_t ms) noexcept;
+LIBIMP_EXPORT ::LIBIMP::result<bool> evt_wait(::LIBIMP::span<evt_t>, std::int64_t ms) noexcept;
+
+/**
+ * \brief The event object.
+ */
+class LIBIMP_EXPORT event {
+  evt_t evt_;
+};
+
+LIBIPC_NAMESPACE_END_
diff --git a/test/ipc/test_ipc_event.cpp b/test/ipc/test_ipc_event.cpp
new file mode 100644
index 00000000..3b975cba
--- /dev/null
+++ b/test/ipc/test_ipc_event.cpp
@@ -0,0 +1,7 @@
+
+#include "gtest/gtest.h"
+
+#include <libipc/event.h>
+
+TEST(event, open_close) {
+}
\ No newline at end of file

From 5a3ecbbc6932833c5bc8b31ebdf605955dc015b4 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 29 Jul 2023 11:57:48 +0800
Subject: [PATCH 190/272] shield system api tests

---
 test/ipc/test_ipc_shm.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/ipc/test_ipc_shm.cpp b/test/ipc/test_ipc_shm.cpp
index 4b23aaa9..249cf37b 100644
--- a/test/ipc/test_ipc_shm.cpp
+++ b/test/ipc/test_ipc_shm.cpp
@@ -77,7 +77,7 @@ TEST(shm, shared_memory) {
 }
 
 #include <libimp/detect_plat.h>
-#if defined(LIBIMP_OS_LINUX)
+#if /*defined(LIBIMP_OS_LINUX)*/ 0
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <sys/types.h>

From 08b6649946a65450bcbc5c03714a7cb9d3715555 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 29 Jul 2023 12:53:17 +0800
Subject: [PATCH 191/272] add: [ipc] add Windows implementation of event

---
 include/libipc/event.h               |   6 +-
 src/libipc/CMakeLists.txt            |   6 +-
 src/libipc/event.cpp                 |  27 +++++
 src/libipc/platform/win/event_impl.h | 155 +++++++++++++++++++++++++++
 src/libipc/platform/win/mmap_impl.h  |   8 +-
 5 files changed, 194 insertions(+), 8 deletions(-)
 create mode 100644 src/libipc/event.cpp
 create mode 100644 src/libipc/platform/win/event_impl.h

diff --git a/include/libipc/event.h b/include/libipc/event.h
index 005d984a..d10e6220 100644
--- a/include/libipc/event.h
+++ b/include/libipc/event.h
@@ -19,7 +19,7 @@ LIBIPC_NAMESPACE_BEG_
 struct evt_handle;
 using evt_t = evt_handle *;
 
-/// \brief Create a new event object with a name.
+/// \brief Creates or opens a named event object.
 LIBIMP_EXPORT ::LIBIMP::result<evt_t> evt_open(std::string name) noexcept;
 
 /// \brief Close the event object.
@@ -32,8 +32,10 @@ LIBIMP_EXPORT std::string evt_name(evt_t) noexcept;
 /// \brief Sets the event object to the signaled state.
 LIBIMP_EXPORT ::LIBIMP::result<void> evt_set(evt_t) noexcept;
 
-/// \brief Waits until one of the specified event objects is in the signaled state.
+/// \brief Waits until the specified object is in the signaled state or the time-out interval elapses.
 LIBIMP_EXPORT ::LIBIMP::result<bool> evt_wait(evt_t, std::int64_t ms) noexcept;
+
+/// \brief Waits until one or all of the specified objects are in the signaled state or the time-out interval elapses.
 LIBIMP_EXPORT ::LIBIMP::result<bool> evt_wait(::LIBIMP::span<evt_t>, std::int64_t ms) noexcept;
 
 /**
diff --git a/src/libipc/CMakeLists.txt b/src/libipc/CMakeLists.txt
index 5ec25636..8ece8b53 100644
--- a/src/libipc/CMakeLists.txt
+++ b/src/libipc/CMakeLists.txt
@@ -41,9 +41,11 @@ target_include_directories(${PROJECT_NAME}
 if(NOT MSVC)
   target_link_libraries(${PROJECT_NAME} PUBLIC
     $<$<NOT:$<STREQUAL:${CMAKE_SYSTEM_NAME},QNX>>:pthread>
-    $<$<NOT:$<OR:$<STREQUAL:${CMAKE_SYSTEM_NAME},Windows>,$<STREQUAL:${CMAKE_SYSTEM_NAME},QNX>>>:rt>)
+    $<$<NOT:$<OR:$<STREQUAL:${CMAKE_SYSTEM_NAME},Windows>,$<STREQUAL:${CMAKE_SYSTEM_NAME},QNX>>>:rt>
+    "-Wl,--whole-archive" imp pmr "-Wl,--no-whole-archive")
+else()
+  target_link_libraries(${PROJECT_NAME} PUBLIC imp pmr)
 endif()
-target_link_libraries(${PROJECT_NAME} PUBLIC imp)
 
 install(
   TARGETS ${PROJECT_NAME}
diff --git a/src/libipc/event.cpp b/src/libipc/event.cpp
new file mode 100644
index 00000000..3f14aef7
--- /dev/null
+++ b/src/libipc/event.cpp
@@ -0,0 +1,27 @@
+
+#include "libimp/log.h"
+
+#include "libimp/detect_plat.h"
+
+#include "libimp/detect_plat.h"
+#if defined(LIBIMP_OS_WIN)
+# include "libipc/platform/win/event_impl.h"
+#else
+#endif
+
+LIBIPC_NAMESPACE_BEG_
+
+/// \brief C style event access interface implementation.
+
+std::string evt_name(evt_t evt) noexcept {
+  LIBIMP_LOG_();
+  if (!is_valid(evt)) {
+    log.error("handle is null.");
+    return {};
+  }
+  return evt->name;
+}
+
+/// \brief The event object.
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/event_impl.h b/src/libipc/platform/win/event_impl.h
new file mode 100644
index 00000000..ca892f6a
--- /dev/null
+++ b/src/libipc/platform/win/event_impl.h
@@ -0,0 +1,155 @@
+/**
+ * \file libipc/platform/win/event_impl.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <string>
+#include <memory>
+#include <vector>
+#include <cstddef>
+
+#include <Windows.h>
+
+#include "libimp/log.h"
+#include "libipc/event.h"
+
+#include "get_sa.h"
+#include "to_tchar.h"
+
+LIBIPC_NAMESPACE_BEG_
+using namespace ::LIBIMP;
+
+struct evt_handle {
+  std::string name;
+  HANDLE h_event;
+};
+
+namespace {
+
+bool is_valid(evt_t evt) noexcept {
+  return (evt != nullptr) && (evt->h_event != NULL);
+}
+
+} // namespace
+
+/**
+ * \brief Creates or opens a named event object.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-createeventa
+ * \param name The name of the event object. The name is limited to MAX_PATH characters. Name comparison is case sensitive.
+ * \return A handle to the event object, NULL on error.
+ */
+result<evt_t> evt_open(std::string name) noexcept {
+  LIBIMP_LOG_();
+  auto t_name = detail::to_tstring(name);
+  auto h = ::CreateEvent(detail::get_sa(), FALSE, FALSE, t_name.c_str());
+  if (h == NULL) {
+    auto err = sys::error();
+    log.error("failed: CreateEvent(FALSE, FALSE, ", name, "). error = ", err);
+    return {nullptr, err};
+  }
+  return new evt_handle{std::move(name), h};
+}
+
+/**
+ * \brief Closes an open object handle.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
+ */
+result<void> evt_close(evt_t evt) noexcept {
+  LIBIMP_LOG_();
+  LIBIMP_UNUSED auto guard = std::unique_ptr<evt_handle>(evt);
+  if (!is_valid(evt)) {
+    log.error("handle is null.");
+    return {};
+  }
+  if (!::CloseHandle(evt->h_event)) {
+    auto err = sys::error();
+    log.error("failed: CloseHandle(", evt->h_event, "). error = ", err);
+    return err;
+  }
+  return no_error;
+}
+
+/**
+ * \brief Sets the specified event object to the signaled state.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-setevent
+ */
+result<void> evt_set(evt_t evt) noexcept {
+  LIBIMP_LOG_();
+  if (!is_valid(evt)) {
+    log.error("handle is null.");
+    return {};
+  }
+  if (!::SetEvent(evt->h_event)) {
+    auto err = sys::error();
+    log.error("failed: SetEvent(", evt->h_event, "). error = ", err);
+    return err;
+  }
+  return no_error;
+}
+
+/**
+ * \brief Waits until the specified object is in the signaled state or the time-out interval elapses.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitforsingleobject
+ */
+result<bool> evt_wait(evt_t evt, std::int64_t ms) noexcept {
+  LIBIMP_LOG_();
+  if (!is_valid(evt)) {
+    log.error("handle is null.");
+    return {};
+  }
+  DWORD dwMilliseconds = (ms < 0) ? INFINITE : static_cast<DWORD>(ms);
+  auto r = ::WaitForSingleObject(evt->h_event, dwMilliseconds);
+  if (r == WAIT_TIMEOUT) {
+    return false;
+  }
+  if (r == WAIT_ABANDONED_0) {
+    log.error("failed: WaitForSingleObject(", evt->h_event, ", ", dwMilliseconds, "). error = WAIT_ABANDONED_0");
+    return {};
+  }
+  if (r == WAIT_OBJECT_0) {
+    return true;
+  }
+  auto err = sys::error();
+  log.error("failed: WaitForSingleObject(", evt->h_event, ", ", dwMilliseconds, "). error = ", err);
+  return {false, err};
+}
+
+/**
+ * \brief Waits until one or all of the specified objects are in the signaled state or the time-out interval elapses.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitformultipleobjects
+ */
+result<bool> evt_wait(::LIBIMP::span<evt_t> evts, std::int64_t ms) noexcept {
+  LIBIMP_LOG_();
+  if (evts.empty()) {
+    log.error("evts handle is empty.");
+    return {};
+  }
+  // Conversion of the event handle array to the windows handle array.
+  std::vector<HANDLE> handles(evts.size());
+  for (std::size_t i = 0; i < evts.size(); ++i) {
+    if (!is_valid(evts[i])) {
+      log.error("handle is null.");
+      return {};
+    }
+    handles[i] = evts[i]->h_event;
+  }
+  // Wait for the events.
+  DWORD dwMilliseconds = (ms < 0) ? INFINITE : static_cast<DWORD>(ms);
+  auto r = ::WaitForMultipleObjects(static_cast<DWORD>(handles.size()), handles.data(), FALSE, dwMilliseconds);
+  if (r == WAIT_TIMEOUT) {
+    return false;
+  }
+  if ((r >= WAIT_ABANDONED_0) && (r < WAIT_ABANDONED_0 + handles.size())) {
+    log.error("failed: WaitForMultipleObjects(", handles.size(), ", ", dwMilliseconds, "). error = WAIT_ABANDONED_0 + ", r - WAIT_ABANDONED_0);
+    return {};
+  }
+  if ((r >= WAIT_OBJECT_0) && (r < WAIT_OBJECT_0 + handles.size())) {
+    return true;
+  }
+  auto err = sys::error();
+  log.error("failed: WaitForMultipleObjects(", handles.size(), ", ", dwMilliseconds, "). error = ", err);
+  return {false, err};
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index 9a5b78dd..962dc2f0 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -53,12 +53,12 @@ result<void> mmap_close(HANDLE h) {
  * \see https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-openfilemappinga
  *      https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-createfilemappinga
  * 
- * \param file Specifies the name of the file mapping object
+ * \param file Specifies the name of the file mapping object.
  * \param size Specifies the size required to create a file mapping object.
- *             This size is ignored when opening an existing file mapping object
- * \param type Combinable open modes, create | open
+ *             This size is ignored when opening an existing file mapping object.
+ * \param type Combinable open modes, create | open.
  * 
- * \return File mapping object HANDLE, NULL on error
+ * \return File mapping object HANDLE, NULL on error.
  */
 result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type type) noexcept {
   LIBIMP_LOG_();

From bad1ff4696600021929af2a96b53ac1e925a697f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 29 Jul 2023 13:18:46 +0800
Subject: [PATCH 192/272] fix: [imp] dataof/countof's SFINAE may be invalid

---
 include/libimp/countof.h |  8 +++++---
 include/libimp/dataof.h  | 12 +++++++++---
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/include/libimp/countof.h b/include/libimp/countof.h
index 2b77cf5c..9298f8de 100644
--- a/include/libimp/countof.h
+++ b/include/libimp/countof.h
@@ -71,9 +71,11 @@ struct trait<C, false, true> {
 
 } // namespace detail_countof
 
-template <typename C, typename R = detail_countof::trait<C>>
-constexpr auto countof(C const &c) noexcept(noexcept(R::countof(c))) {
-  return R::countof(c);
+template <typename C, 
+          typename T = detail_countof::trait<C>, 
+          typename R = decltype(T::countof(std::declval<C const &>()))>
+constexpr R countof(C const &c) noexcept(noexcept(T::countof(c))) {
+  return T::countof(c);
 }
 
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/dataof.h b/include/libimp/dataof.h
index a2d9049d..a49bd361 100644
--- a/include/libimp/dataof.h
+++ b/include/libimp/dataof.h
@@ -80,13 +80,19 @@ struct trait<C, false, false> {
   constexpr static T const *dataof(std::initializer_list<T> il) noexcept {
     return il.begin();
   }
+  template <typename T>
+  constexpr static T const *dataof(T const *p) noexcept {
+    return p;
+  }
 };
 
 } // namespace detail_dataof
 
-template <typename T, typename R = detail_dataof::trait<std::remove_cv_t<std::remove_reference_t<T>>>>
-constexpr auto dataof(T &&c) noexcept(noexcept(R::dataof(std::forward<T>(c)))) {
-  return R::dataof(std::forward<T>(c));
+template <typename C, 
+          typename T = detail_dataof::trait<std::remove_cv_t<std::remove_reference_t<C>>>, 
+          typename R = decltype(T::dataof(std::declval<C>()))>
+constexpr R dataof(C &&c) noexcept(noexcept(T::dataof(std::forward<C>(c)))) {
+  return T::dataof(std::forward<C>(c));
 }
 
 LIBIMP_NAMESPACE_END_

From f5908cfe6938dfadb786e356151cf96d2e86e7e4 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 29 Jul 2023 13:26:06 +0800
Subject: [PATCH 193/272] clean up unnecessary 3rdparty library files

---
 3rdparty/fmtlib-src          | 1 -
 3rdparty/googlebenchmark-src | 1 -
 3rdparty/googletest-src      | 1 -
 benchmark/CMakeLists.txt     | 4 ++--
 test/CMakeLists.txt          | 7 +++++--
 5 files changed, 7 insertions(+), 7 deletions(-)
 delete mode 160000 3rdparty/fmtlib-src
 delete mode 160000 3rdparty/googlebenchmark-src
 delete mode 160000 3rdparty/googletest-src

diff --git a/3rdparty/fmtlib-src b/3rdparty/fmtlib-src
deleted file mode 160000
index a3370119..00000000
--- a/3rdparty/fmtlib-src
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit a33701196adfad74917046096bf5a2aa0ab0bb50
diff --git a/3rdparty/googlebenchmark-src b/3rdparty/googlebenchmark-src
deleted file mode 160000
index 361e8d1c..00000000
--- a/3rdparty/googlebenchmark-src
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 361e8d1cfe0c6c36d30b39f1b61302ece5507320
diff --git a/3rdparty/googletest-src b/3rdparty/googletest-src
deleted file mode 160000
index 15460959..00000000
--- a/3rdparty/googletest-src
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 15460959cbbfa20e66ef0b5ab497367e47fc0a04
diff --git a/benchmark/CMakeLists.txt b/benchmark/CMakeLists.txt
index a81d85ff..50b2119d 100644
--- a/benchmark/CMakeLists.txt
+++ b/benchmark/CMakeLists.txt
@@ -14,8 +14,8 @@ FetchContent_Declare(googlebenchmark
   GIT_REPOSITORY https://github.com/google/benchmark.git
   GIT_TAG        v1.7.0
 )
-set(BENCHMARK_ENABLE_TESTING OFF)
-set(BENCHMARK_ENABLE_INSTALL OFF)
+set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "" FORCE)
+set(BENCHMARK_ENABLE_INSTALL OFF CACHE BOOL "" FORCE)
 add_definitions(-DBENCHMARK_STATIC_DEFINE)
 FetchContent_MakeAvailable(googlebenchmark)
 
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index d7b27792..bbd37cd9 100755
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -6,6 +6,9 @@ if(NOT MSVC)
     -Wno-missing-field-initializers 
     -Wno-unused-variable 
     -Wno-unused-function)
+else()
+  add_compile_options(
+    /wd4723)
 endif()
 
 FetchContent_Declare(googletest
@@ -14,9 +17,9 @@ FetchContent_Declare(googletest
 )
 set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
 if (LIBIPC_USE_STATIC_CRT)
-  set(gtest_force_shared_crt OFF)
+  set(gtest_force_shared_crt OFF CACHE BOOL "" FORCE)
 else()
-  set(gtest_force_shared_crt ON)
+  set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
 endif()
 FetchContent_MakeAvailable(googletest)
 

From 7ec99c33940905805307d7e5807c2c900ac90e24 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 29 Jul 2023 13:27:22 +0800
Subject: [PATCH 194/272] add some simple event tests

---
 test/ipc/test_ipc_event.cpp | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/test/ipc/test_ipc_event.cpp b/test/ipc/test_ipc_event.cpp
index 3b975cba..fcd9c518 100644
--- a/test/ipc/test_ipc_event.cpp
+++ b/test/ipc/test_ipc_event.cpp
@@ -4,4 +4,16 @@
 #include <libipc/event.h>
 
 TEST(event, open_close) {
-}
\ No newline at end of file
+  auto evt = ipc::evt_open("test");
+  ASSERT_TRUE(evt);
+  ASSERT_EQ(ipc::evt_name(*evt), "test");
+  ASSERT_TRUE(ipc::evt_close(*evt));
+}
+
+TEST(event, set_wait) {
+  auto evt = ipc::evt_open("test");
+  ASSERT_TRUE(evt);
+  ASSERT_TRUE(ipc::evt_set(*evt));
+  ASSERT_TRUE(ipc::evt_wait(*evt, 0));
+  ASSERT_TRUE(ipc::evt_close(*evt));
+}

From f930dfe34d9c607a87e1a384f31554f7d442cc47 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 30 Jul 2023 16:09:29 +0800
Subject: [PATCH 195/272] continue adding `event` ut

---
 include/libipc/event.h               |  2 +-
 src/libipc/event.cpp                 |  2 -
 src/libipc/platform/win/event_impl.h |  7 ++-
 test/ipc/test_ipc_event.cpp          | 82 +++++++++++++++++++++++++++-
 4 files changed, 87 insertions(+), 6 deletions(-)

diff --git a/include/libipc/event.h b/include/libipc/event.h
index d10e6220..ee56ac7c 100644
--- a/include/libipc/event.h
+++ b/include/libipc/event.h
@@ -36,7 +36,7 @@ LIBIMP_EXPORT ::LIBIMP::result<void> evt_set(evt_t) noexcept;
 LIBIMP_EXPORT ::LIBIMP::result<bool> evt_wait(evt_t, std::int64_t ms) noexcept;
 
 /// \brief Waits until one or all of the specified objects are in the signaled state or the time-out interval elapses.
-LIBIMP_EXPORT ::LIBIMP::result<bool> evt_wait(::LIBIMP::span<evt_t>, std::int64_t ms) noexcept;
+LIBIMP_EXPORT ::LIBIMP::result<bool> evt_wait(::LIBIMP::span<evt_t const>, std::int64_t ms) noexcept;
 
 /**
  * \brief The event object.
diff --git a/src/libipc/event.cpp b/src/libipc/event.cpp
index 3f14aef7..81fb9cba 100644
--- a/src/libipc/event.cpp
+++ b/src/libipc/event.cpp
@@ -1,8 +1,6 @@
 
 #include "libimp/log.h"
 
-#include "libimp/detect_plat.h"
-
 #include "libimp/detect_plat.h"
 #if defined(LIBIMP_OS_WIN)
 # include "libipc/platform/win/event_impl.h"
diff --git a/src/libipc/platform/win/event_impl.h b/src/libipc/platform/win/event_impl.h
index ca892f6a..90e1f648 100644
--- a/src/libipc/platform/win/event_impl.h
+++ b/src/libipc/platform/win/event_impl.h
@@ -42,7 +42,10 @@ bool is_valid(evt_t evt) noexcept {
 result<evt_t> evt_open(std::string name) noexcept {
   LIBIMP_LOG_();
   auto t_name = detail::to_tstring(name);
-  auto h = ::CreateEvent(detail::get_sa(), FALSE, FALSE, t_name.c_str());
+  auto h = ::CreateEvent(detail::get_sa(), 
+                        /*bManualReset*/ FALSE, 
+                        /*bInitialState*/FALSE, 
+                        /*lpName*/       t_name.c_str());
   if (h == NULL) {
     auto err = sys::error();
     log.error("failed: CreateEvent(FALSE, FALSE, ", name, "). error = ", err);
@@ -119,7 +122,7 @@ result<bool> evt_wait(evt_t evt, std::int64_t ms) noexcept {
  * \brief Waits until one or all of the specified objects are in the signaled state or the time-out interval elapses.
  * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitformultipleobjects
  */
-result<bool> evt_wait(::LIBIMP::span<evt_t> evts, std::int64_t ms) noexcept {
+result<bool> evt_wait(::LIBIMP::span<evt_t const> evts, std::int64_t ms) noexcept {
   LIBIMP_LOG_();
   if (evts.empty()) {
     log.error("evts handle is empty.");
diff --git a/test/ipc/test_ipc_event.cpp b/test/ipc/test_ipc_event.cpp
index fcd9c518..a0332b1a 100644
--- a/test/ipc/test_ipc_event.cpp
+++ b/test/ipc/test_ipc_event.cpp
@@ -1,4 +1,6 @@
 
+#include <thread>
+
 #include "gtest/gtest.h"
 
 #include <libipc/event.h>
@@ -10,10 +12,88 @@ TEST(event, open_close) {
   ASSERT_TRUE(ipc::evt_close(*evt));
 }
 
+TEST(event, wait_timeout) {
+  auto evt = ipc::evt_open("test");
+  ASSERT_TRUE(evt);
+  ASSERT_FALSE(*ipc::evt_wait(*evt, 0));
+  ASSERT_TRUE(ipc::evt_close(*evt));
+}
+
 TEST(event, set_wait) {
   auto evt = ipc::evt_open("test");
   ASSERT_TRUE(evt);
   ASSERT_TRUE(ipc::evt_set(*evt));
-  ASSERT_TRUE(ipc::evt_wait(*evt, 0));
+  ASSERT_TRUE(*ipc::evt_wait(*evt, 0));
+  ASSERT_TRUE(ipc::evt_close(*evt));
+}
+
+TEST(event, unicast) {
+  auto evt = ipc::evt_open("test");
+  ASSERT_TRUE(evt);
+  int success = 0;
+  auto wait = [evt, &success] {
+    if (*ipc::evt_wait(*evt, 200)) ++success;
+  };
+  auto th1 = std::thread(wait);
+  auto th2 = std::thread(wait);
+  auto th3 = std::thread(wait);
+  std::this_thread::sleep_for(std::chrono::milliseconds(100));
+  ASSERT_TRUE(ipc::evt_set(*evt));
+  th1.join();
+  th2.join();
+  th3.join();
   ASSERT_TRUE(ipc::evt_close(*evt));
+  ASSERT_EQ(success, 1);
+}
+
+TEST(event, wait_multi_timeout) {
+  auto evt1 = ipc::evt_open("test1");
+  ASSERT_TRUE(evt1);
+  auto evt2 = ipc::evt_open("test2");
+  ASSERT_TRUE(evt2);
+  auto evt3 = ipc::evt_open("test3");
+  ASSERT_TRUE(evt3);
+  ASSERT_FALSE(*ipc::evt_wait(imp::make_span({*evt1, *evt2, *evt3}), 0));
+  ASSERT_TRUE(ipc::evt_close(*evt1));
+  ASSERT_TRUE(ipc::evt_close(*evt2));
+  ASSERT_TRUE(ipc::evt_close(*evt3));
+}
+
+TEST(event, set_wait_multi) {
+  auto evt1 = ipc::evt_open("test1");
+  ASSERT_TRUE(evt1);
+  auto evt2 = ipc::evt_open("test2");
+  ASSERT_TRUE(evt2);
+  auto evt3 = ipc::evt_open("test3");
+  ASSERT_TRUE(evt3);
+  ASSERT_TRUE(ipc::evt_set(*evt2));
+  ASSERT_TRUE(*ipc::evt_wait(imp::make_span({*evt1, *evt2, *evt3}), 0));
+  ASSERT_TRUE(ipc::evt_close(*evt1));
+  ASSERT_TRUE(ipc::evt_close(*evt2));
+  ASSERT_TRUE(ipc::evt_close(*evt3));
+}
+
+TEST(event, unicast_multi) {
+  auto evt1 = ipc::evt_open("test1");
+  ASSERT_TRUE(evt1);
+  auto evt2 = ipc::evt_open("test2");
+  ASSERT_TRUE(evt2);
+  auto evt3 = ipc::evt_open("test3");
+  ASSERT_TRUE(evt3);
+  int success = 0;
+  auto wait = [evt1, evt2, evt3, &success] {
+    if (*ipc::evt_wait(imp::make_span({*evt1, *evt2, *evt3}), 200)) ++success;
+  };
+  auto th1 = std::thread(wait);
+  auto th2 = std::thread(wait);
+  auto th3 = std::thread(wait);
+  std::this_thread::sleep_for(std::chrono::milliseconds(100));
+  ASSERT_TRUE(ipc::evt_set(*evt3));
+  th1.join();
+  th2.join();
+  th3.join();
+  ASSERT_TRUE(ipc::evt_close(*evt1));
+  ASSERT_TRUE(ipc::evt_close(*evt2));
+  ASSERT_TRUE(ipc::evt_close(*evt3));
+  ASSERT_EQ(success, 1);
 }

From 774a3c9af7f6097b2c3c34e5cc8290688173896f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 2 Sep 2023 10:52:37 +0800
Subject: [PATCH 196/272] fixed a stupid bug in benchmark

---
 benchmark/benchmark_ipc.cpp | 51 +++++++++++++++++++++++++++++--------
 src/libipc/event.cpp        |  2 ++
 test/ipc/test_ipc_event.cpp |  2 ++
 3 files changed, 45 insertions(+), 10 deletions(-)

diff --git a/benchmark/benchmark_ipc.cpp b/benchmark/benchmark_ipc.cpp
index 8f31013c..0c2b649a 100644
--- a/benchmark/benchmark_ipc.cpp
+++ b/benchmark/benchmark_ipc.cpp
@@ -9,6 +9,7 @@
 #include <sys/types.h>
 #include <sys/inotify.h>
 #include <netinet/in.h>
+#include <errno.h>
 
 #include <string.h>
 #include <unistd.h>
@@ -72,14 +73,27 @@ struct mqueue_reader {
       auto shm = ipc::shared_memory("shm-mqueue_reader", sizeof(flag_t));
       auto flag = shm.as<flag_t>();
       printf("mqueue_reader start.\n");
-      mqd_t wfd = mq_open("/mqueue-wfd", O_RDONLY);
-      mqd_t rfd = mq_open("/mqueue-rfd", O_WRONLY);
+      mq_unlink("/mqueue-wfd");
+      mq_unlink("/mqueue-rfd");
+      struct mq_attr attr = {0, 10, 1, 0};
+      mqd_t wfd = mq_open("/mqueue-wfd", O_CREAT | O_RDONLY, 0666, &attr);
+      mqd_t rfd = mq_open("/mqueue-rfd", O_CREAT | O_WRONLY, 0666, &attr);
+      if (wfd < 0 || rfd < 0) {
+        printf("mq_open error. errno = %d\n", errno);
+        return;
+      }
       while (!flag->load(std::memory_order_relaxed)) {
         char n {};
         // read
-        mq_receive(wfd, &n, sizeof(n), nullptr);
+        if (mq_receive(wfd, &n, sizeof(n), nullptr) < 0) {
+          printf("mq_receive error. errno = %d\n", errno);
+          return;
+        }
         // write
-        mq_send(rfd, &n, sizeof(n), 0);
+        if (mq_send(rfd, &n, sizeof(n), 0) < 0) {
+          printf("mq_send error. errno = %d\n", errno);
+          return;
+        }
       }
       printf("mqueue_reader exit.\n");
       mq_close(wfd);
@@ -91,9 +105,16 @@ struct mqueue_reader {
     auto shm = ipc::shared_memory("shm-mqueue_reader", sizeof(flag_t));
     shm.as<flag_t>()->store(true, std::memory_order_seq_cst);
     {
-      mqd_t wfd = mq_open("/mqueue-wfd", O_WRONLY);
+      mqd_t wfd = mq_open("/mqueue-wfd", O_EXCL | O_WRONLY, 0666, NULL);
+      if (wfd < 0) {
+        printf("mq_open error. errno = %d\n", errno);
+        return;
+      }
       char n {};
-      mq_send(wfd, &n, sizeof(n), 0);
+      if (mq_send(wfd, &n, sizeof(n), 0) < 0) {
+        printf("mq_send error. errno = %d\n", errno);
+        return;
+      }
       mq_close(wfd);
     }
     test::join_subproc(pid_);
@@ -314,14 +335,24 @@ void ipc_eventfd_rtt(benchmark::State &state) {
 }
 
 void ipc_mqueue_rtt(benchmark::State &state) {
-  mqd_t wfd = mq_open("/mqueue-wfd", O_WRONLY);
-  mqd_t rfd = mq_open("/mqueue-rfd", O_RDONLY);
+  mqd_t wfd = mq_open("/mqueue-wfd", O_EXCL | O_WRONLY, 0666, NULL);
+  mqd_t rfd = mq_open("/mqueue-rfd", O_EXCL | O_RDONLY, 0666, NULL);
+  if (wfd < 0 || rfd < 0) {
+    printf("mq_open error. errno = %d\n", errno);
+    return;
+  }
   for (auto _ : state) {
     char n {};
     // write
-    mq_send(wfd, &n, sizeof(n), 0);
+    if (mq_send(wfd, &n, sizeof(n), 0) < 0) {
+      printf("mq_send error. errno = %d\n", errno);
+      return;
+    }
     // read
-    mq_receive(rfd, &n, sizeof(n), nullptr);
+    if (mq_receive(rfd, &n, sizeof(n), nullptr) < 0) {
+      printf("mq_receive error. errno = %d\n", errno);
+      return;
+    }
   }
   mq_close(wfd);
   mq_close(rfd);
diff --git a/src/libipc/event.cpp b/src/libipc/event.cpp
index 81fb9cba..5fa762da 100644
--- a/src/libipc/event.cpp
+++ b/src/libipc/event.cpp
@@ -7,6 +7,7 @@
 #else
 #endif
 
+#if !defined(LIBIMP_OS_LINUX)
 LIBIPC_NAMESPACE_BEG_
 
 /// \brief C style event access interface implementation.
@@ -23,3 +24,4 @@ std::string evt_name(evt_t evt) noexcept {
 /// \brief The event object.
 
 LIBIPC_NAMESPACE_END_
+#endif
diff --git a/test/ipc/test_ipc_event.cpp b/test/ipc/test_ipc_event.cpp
index a0332b1a..c4398e13 100644
--- a/test/ipc/test_ipc_event.cpp
+++ b/test/ipc/test_ipc_event.cpp
@@ -5,6 +5,7 @@
 
 #include <libipc/event.h>
 
+#if !defined(LIBIMP_OS_LINUX)
 TEST(event, open_close) {
   auto evt = ipc::evt_open("test");
   ASSERT_TRUE(evt);
@@ -97,3 +98,4 @@ TEST(event, unicast_multi) {
   ASSERT_TRUE(ipc::evt_close(*evt3));
   ASSERT_EQ(success, 1);
 }
+#endif

From cd545653c439b43433e3292a937c0f3e168acbaa Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 2 Sep 2023 14:10:51 +0800
Subject: [PATCH 197/272] upd: [pmr] optimize allocator implementation

---
 include/libconcur/data_model.h      |  11 +--
 include/libconcur/element.h         |   2 +-
 include/libimp/byte.h               |   3 +-
 include/libimp/construct.h          |   4 +-
 include/libimp/log.h                |   2 +-
 include/libimp/pimpl.h              |   6 +-
 include/libimp/result.h             |   4 +-
 include/libpmr/allocator.h          |  86 +++++++++-----------
 include/libpmr/holder_base.h        | 122 ++++++++++++++++++++++++++++
 include/libpmr/small_storage.h      |  35 ++++++++
 src/libpmr/allocator.cpp            |  43 +++-------
 test/pmr/test_pmr_allocator.cpp     | 102 +++++++++++------------
 test/pmr/test_pmr_small_storage.cpp |   7 ++
 13 files changed, 278 insertions(+), 149 deletions(-)
 create mode 100644 include/libpmr/holder_base.h
 create mode 100644 include/libpmr/small_storage.h
 create mode 100644 test/pmr/test_pmr_small_storage.cpp

diff --git a/include/libconcur/data_model.h b/include/libconcur/data_model.h
index 5c5b5c4f..514b26d9 100644
--- a/include/libconcur/data_model.h
+++ b/include/libconcur/data_model.h
@@ -77,18 +77,15 @@ class data_model {
   };
 
   data *init(index_t circ_size) noexcept {
-    if (!data_allocator_) {
-      return nullptr;
-    }
     void *data_ptr = nullptr;
     LIBIMP_TRY {
-      data_ptr = data_allocator_.alloc(data::size_of(circ_size));
+      data_ptr = data_allocator_.allocate(data::size_of(circ_size));
       if (data_ptr == nullptr) {
         return nullptr;
       }
       return ::LIBIMP::construct<data>(data_ptr, circ_size);
     } LIBIMP_CATCH(...) {
-      data_allocator_.dealloc(data_ptr, data::size_of(circ_size));
+      data_allocator_.deallocate(data_ptr, data::size_of(circ_size));
       return nullptr;
     }
   }
@@ -128,7 +125,7 @@ class data_model {
     if (valid()) {
       auto sz = data_->byte_size();
       (void)::LIBIMP::destroy<data>(data_);
-      data_allocator_.dealloc(data_, sz);
+      data_allocator_.deallocate(data_, sz);
     }
   }
 
@@ -148,7 +145,7 @@ class data_model {
     : data_model(default_circle_buffer_size) {}
 
   bool valid() const noexcept {
-    return (data_ != nullptr) && data_allocator_.valid();
+    return data_ != nullptr;
   }
 
   explicit operator bool() const noexcept {
diff --git a/include/libconcur/element.h b/include/libconcur/element.h
index ba08690d..7c816eca 100644
--- a/include/libconcur/element.h
+++ b/include/libconcur/element.h
@@ -64,7 +64,7 @@ class element {
   using value_type = T;
 
   template <typename... A>
-  element(A &&... args) 
+  element(A &&...args) 
     noexcept(noexcept(T{std::forward<A>(args)...}))
     : f_ct_{state::invalid_value}
     , data_{std::forward<A>(args)...} {}
diff --git a/include/libimp/byte.h b/include/libimp/byte.h
index da646bea..982d1730 100644
--- a/include/libimp/byte.h
+++ b/include/libimp/byte.h
@@ -44,8 +44,7 @@ class byte {
   std::uint8_t bits_;
 
 public:
-  constexpr byte() noexcept
-    : byte(0) {}
+  byte() noexcept = default;
 
   template <typename T, typename = detail::is_integral<T>>
   constexpr byte(T v) noexcept
diff --git a/include/libimp/construct.h b/include/libimp/construct.h
index 99af50ca..851c6578 100644
--- a/include/libimp/construct.h
+++ b/include/libimp/construct.h
@@ -23,7 +23,7 @@ LIBIMP_NAMESPACE_BEG_
 */
 
 template <typename T, typename... A>
-auto construct(void *p, A &&... args)
+auto construct(void *p, A &&...args)
   -> std::enable_if_t<::std::is_constructible<T, A...>::value, T *> {
 #if defined(LIBIMP_CPP_20)
   return std::construct_at(static_cast<T *>(p), std::forward<A>(args)...);
@@ -33,7 +33,7 @@ auto construct(void *p, A &&... args)
 }
 
 template <typename T, typename... A>
-auto construct(void *p, A &&... args)
+auto construct(void *p, A &&...args)
   -> std::enable_if_t<!::std::is_constructible<T, A...>::value, T *> {
   return ::new (p) T{std::forward<A>(args)...};
 }
diff --git a/include/libimp/log.h b/include/libimp/log.h
index 4231a40c..bf6c1a18 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -122,7 +122,7 @@ class grip {
     , level_limit_(level_limit) {}
 
   template <typename... A>
-  grip const &operator()(log::level l, A &&... args) const noexcept {
+  grip const &operator()(log::level l, A &&...args) const noexcept {
     if (underlyof(l) < underlyof(level_limit_)) {
       return *this;
     }
diff --git a/include/libimp/pimpl.h b/include/libimp/pimpl.h
index 63992d05..df7787a1 100644
--- a/include/libimp/pimpl.h
+++ b/include/libimp/pimpl.h
@@ -24,7 +24,7 @@ struct is_comfortable {
 };
 
 template <typename T, typename... A>
-auto make(A &&... args) -> std::enable_if_t<is_comfortable<T>::value, T *> {
+auto make(A &&...args) -> std::enable_if_t<is_comfortable<T>::value, T *> {
   T *buf {};
   // construct an object using memory of a pointer
   construct<T>(&buf, std::forward<A>(args)...);
@@ -42,7 +42,7 @@ auto clear(T *p) noexcept -> std::enable_if_t<is_comfortable<T>::value> {
 }
 
 template <typename T, typename... A>
-auto make(A &&... args) -> std::enable_if_t<!is_comfortable<T>::value, T *> {
+auto make(A &&...args) -> std::enable_if_t<!is_comfortable<T>::value, T *> {
   return new T{std::forward<A>(args)...};
 }
 
@@ -60,7 +60,7 @@ template <typename T>
 class Obj {
 public:
   template <typename... A>
-  static T *make(A &&... args) {
+  static T *make(A &&...args) {
     return pimpl::make<T>(std::forward<A>(args)...);
   }
 
diff --git a/include/libimp/result.h b/include/libimp/result.h
index aea6738a..3960f88d 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -142,7 +142,7 @@ class result : public TypeTraits {
             typename = not_match<result, A...>,
             typename = decltype(type_traits_t::init_code(std::declval<storage_t &>()
                                                        , std::declval<A>()...))>
-  result(A &&... args) noexcept {
+  result(A &&...args) noexcept {
     type_traits_t::init_code(code_, std::forward<A>(args)...);
   }
 
@@ -171,7 +171,7 @@ class result<void, TypeTraits> {
             typename = not_match<result, A...>,
             typename = decltype(type_traits_t::init_code(std::declval<storage_t &>()
                                                        , std::declval<A>()...))>
-  result(A &&... args) noexcept {
+  result(A &&...args) noexcept {
     type_traits_t::init_code(code_, std::forward<A>(args)...);
   }
 
diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index fb61efe1..d24bab25 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -32,63 +32,54 @@ LIBPMR_NAMESPACE_BEG_
  */
 class LIBIMP_EXPORT allocator {
 
-  class holder_base {
+  class holder_mr_base {
   public:
-    virtual ~holder_base() noexcept = default;
-    virtual void *alloc(std::size_t) = 0;
-    virtual void  dealloc(void *, std::size_t) = 0;
-    virtual bool  valid() const noexcept = 0;
+    virtual ~holder_mr_base() noexcept = default;
+    virtual void *alloc(std::size_t, std::size_t) const = 0;
+    virtual void  dealloc(void *, std::size_t, std::size_t) const = 0;
   };
 
-  class holder_null : public holder_base {
+  template <typename MR, typename = bool>
+  class holder_mr;
+
+  /**
+   * \brief An empty holding class used to calculate a reasonable memory size for the holder.
+   * \tparam MR cannot be converted to the type of memory resource
+   */
+  template <typename MR, typename U>
+  class holder_mr : public holder_mr_base {
+  protected:
+    MR *res_;
+
   public:
-    void *alloc(std::size_t) override { return nullptr; }
-    void  dealloc(void *, std::size_t) override {}
-    bool  valid() const noexcept override { return false; }
+    holder_mr(MR *p_mr) noexcept
+      : res_(p_mr) {}
   };
 
-  template <typename MemRes, typename = bool>
-  class holder_memory_resource;
-
   /**
    * \brief A memory resource pointer holder class for type erasure.
    * \tparam MR memory resource type
    */
   template <typename MR>
-  class holder_memory_resource<MR, verify_memory_resource<MR>> : public holder_base {
-    MR *p_mem_res_;
-
+  class holder_mr<MR, verify_memory_resource<MR>> : public holder_mr<MR, void> {
   public:
-    holder_memory_resource(MR *p_mr) noexcept
-      : p_mem_res_(p_mr) {}
+    holder_mr(MR *p_mr) noexcept
+      : holder_mr<MR, void>{p_mr} {}
 
-    void *alloc(std::size_t s) override {
-      return p_mem_res_->allocate(s);
+    void *alloc(std::size_t s, std::size_t a) const override {
+      return res_->allocate(s, a);
     }
 
-    void dealloc(void *p, std::size_t s) override {
-      p_mem_res_->deallocate(p, s);
-    }
-  
-    bool valid() const noexcept override {
-      return p_mem_res_ != nullptr;
+    void dealloc(void *p, std::size_t s, std::size_t a) const override {
+      res_->deallocate(p, s, a);
     }
   };
 
-  /**
-   * \brief An empty holding class used to calculate a reasonable memory size for the holder.
-   * \tparam MR cannot be converted to the type of memory resource
-   */
-  template <typename MR, typename U>
-  class holder_memory_resource : public holder_null {
-    MR *p_dummy_;
-  };
+  using void_holder_t = holder_mr<void *>;
+  alignas(void_holder_t) std::array<::LIBIMP::byte, sizeof(void_holder_t)> holder_;
 
-  using void_holder_type = holder_memory_resource<void>;
-  alignas(void_holder_type) std::array<::LIBIMP::byte, sizeof(void_holder_type)> holder_;
-
-  holder_base &      get_holder() noexcept;
-  holder_base const &get_holder() const noexcept;
+  holder_mr_base &      get_holder() noexcept;
+  holder_mr_base const &get_holder() const noexcept;
 
 public:
   allocator() noexcept;
@@ -97,24 +88,25 @@ class LIBIMP_EXPORT allocator {
   allocator(allocator const &other) noexcept = default;
   allocator &operator=(allocator const &other) & noexcept = default;
 
-  allocator(allocator &&other) noexcept;
-  allocator &operator=(allocator &&other) & noexcept;
+  allocator(allocator &&other) noexcept = default;
+  allocator &operator=(allocator &&other) & noexcept = default;
 
   /// \brief Constructs a allocator from a memory resource pointer
   /// The lifetime of the pointer must be longer than that of allocator.
   template <typename T, verify_memory_resource<T> = true>
-  allocator(T *p_mr) : allocator() {
-    if (p_mr == nullptr) return;
-    ::LIBIMP::construct<holder_memory_resource<T>>(holder_.data(), p_mr);
+  allocator(T *p_mr) noexcept {
+    if (p_mr == nullptr) {
+      ::LIBIMP::construct<holder_mr<new_delete_resource>>(holder_.data(), new_delete_resource::get());
+      return;
+    }
+    ::LIBIMP::construct<holder_mr<T>>(holder_.data(), p_mr);
   }
 
   void swap(allocator &other) noexcept;
-  bool valid() const noexcept;
-  explicit operator bool() const noexcept;
 
   /// \brief Allocate/deallocate memory.
-  void *alloc(std::size_t s);
-  void  dealloc(void *p, std::size_t s);
+  void *allocate(std::size_t s, std::size_t = alignof(std::max_align_t)) const;
+  void  deallocate(void *p, std::size_t s, std::size_t = alignof(std::max_align_t)) const;
 };
 
 LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/holder_base.h b/include/libpmr/holder_base.h
new file mode 100644
index 00000000..fc52c6de
--- /dev/null
+++ b/include/libpmr/holder_base.h
@@ -0,0 +1,122 @@
+/**
+ * \file libpmr/small_storage.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Unified SSO (Small Size Optimization) holder base.
+ * \date 2023-09-02
+ */
+#pragma once
+
+#include <type_traits>
+#include <array>
+#include <typeinfo>
+#include <utility>
+#include <cstddef>
+
+#include "libimp/export.h"
+#include "libimp/construct.h"
+#include "libimp/byte.h"
+#include "libimp/generic.h"
+
+#include "libpmr/def.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+class LIBIMP_EXPORT allocator;
+
+/**
+ * \class holder_base
+ * \brief Data holder base class.
+*/
+class holder_base {
+public:
+  virtual ~holder_base() noexcept = default;
+  virtual bool valid() const noexcept = 0;
+  virtual std::type_info const &type() const noexcept = 0;
+  virtual std::size_t sizeof_type() const noexcept = 0;
+  virtual std::size_t count() const noexcept = 0;
+  virtual std::size_t size () const noexcept = 0;
+  virtual void *get() noexcept = 0;
+  virtual void const *get() const noexcept = 0;
+  virtual void move_to(allocator const &, void *) noexcept = 0;
+  virtual void copy_to(allocator const &, void *) const noexcept(false) = 0;
+};
+
+/**
+ * \class holder_null
+ * \brief A holder implementation that does not hold any data objects.
+*/
+class holder_null : public holder_base {
+public:
+  bool valid() const noexcept override { return false; }
+  std::type_info const &type() const noexcept override { return typeid(nullptr);}
+  std::size_t sizeof_type() const noexcept override { return 0; }
+  std::size_t count() const noexcept override { return 0; }
+  std::size_t size () const noexcept override { return 0; }
+  void *get() noexcept override { return nullptr; }
+  void const *get() const noexcept override { return nullptr; }
+
+  /// \brief The passed destination pointer is never null, 
+  /// and the memory to which it points is uninitialized.
+  void move_to(allocator const &, void *) noexcept override {}
+  void copy_to(allocator const &, void *) const noexcept(false) override {}
+};
+
+template <typename Value, bool/*is on stack*/>
+class holder;
+
+/**
+ * \class template <typename Value> holder<Value, true>
+ * \brief A holder implementation that holds a data object if type `Value` on stack memory.
+ * \tparam Value The storage type of the holder.
+ */
+template <typename Value>
+class holder<Value, true> : public holder_base {
+
+  alignas(alignof(Value)) std::array<::LIBIMP::byte, sizeof(Value)> value_storage_;
+
+public:
+  holder() = default; // uninitialized
+
+  template <typename... A>
+  holder(::LIBIMP::in_place_t, A &&...args) {
+    ::LIBIMP::construct<Value>(value_storage_.data(), std::forward<A>(args)...);
+  }
+
+  bool valid() const noexcept override {
+    return true;
+  }
+
+  std::type_info const &type() const noexcept override {
+    return typeid(Value);
+  }
+
+  std::size_t sizeof_type() const noexcept override {
+    return sizeof(Value);
+  }
+
+  std::size_t count() const noexcept override {
+    return 1;
+  }
+
+  std::size_t size() const noexcept override {
+    return value_storage_.size();
+  }
+
+  void *get() noexcept override {
+    return value_storage_.data();
+  }
+
+  void const *get() const noexcept override {
+    return value_storage_.data();
+  }
+
+  void move_to(allocator const &, void *p) noexcept override {
+    ::LIBIMP::construct<holder>(p, ::LIBIMP::in_place, std::move(*static_cast<Value *>(get())));
+  }
+
+  void copy_to(allocator const &, void *p) const noexcept(false) override {
+    ::LIBIMP::construct<holder>(p, ::LIBIMP::in_place, *static_cast<Value *>(get()));
+  }
+};
+
+LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
new file mode 100644
index 00000000..918dc936
--- /dev/null
+++ b/include/libpmr/small_storage.h
@@ -0,0 +1,35 @@
+/**
+ * \file libpmr/small_storage.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Unified SSO (Small Size Optimization).
+ * \date 2023-09-02
+ */
+#pragma once
+
+#include <type_traits>
+#include <array>
+#include <typeinfo>
+#include <utility>
+#include <memory>
+#include <cstddef>
+
+#include "libimp/export.h"
+#include "libimp/construct.h"
+#include "libimp/byte.h"
+#include "libimp/generic.h"
+
+#include "libpmr/def.h"
+#include "libpmr/holder_base.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/**
+ * \class template <typename Value> holder<Value, false>
+ * \brief A holder implementation that holds a data object if type `Value` on heap memory.
+ * \tparam Value The storage type of the holder.
+ */
+template <typename Value>
+class holder<Value, false> : public holder_base {
+};
+
+LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/allocator.cpp b/src/libpmr/allocator.cpp
index 4760347d..68eb9fc4 100644
--- a/src/libpmr/allocator.cpp
+++ b/src/libpmr/allocator.cpp
@@ -5,54 +5,31 @@
 
 LIBPMR_NAMESPACE_BEG_
 
-allocator::holder_base &allocator::get_holder() noexcept {
-  return *reinterpret_cast<holder_base *>(holder_.data());
+allocator::holder_mr_base &allocator::get_holder() noexcept {
+  return *reinterpret_cast<holder_mr_base *>(holder_.data());
 }
 
-allocator::holder_base const &allocator::get_holder() const noexcept {
-  return *reinterpret_cast<holder_base const *>(holder_.data());
+allocator::holder_mr_base const &allocator::get_holder() const noexcept {
+  return *reinterpret_cast<holder_mr_base const *>(holder_.data());
 }
 
-allocator::allocator() noexcept {
-  ::LIBIMP::construct<holder_null>(holder_.data());
-}
+allocator::allocator() noexcept
+  : allocator(new_delete_resource::get()) {}
 
 allocator::~allocator() noexcept {
   ::LIBIMP::destroy(&get_holder());
 }
 
-allocator::allocator(allocator &&other) noexcept
-  : allocator(other) /*copy*/ {
-  ::LIBIMP::construct<holder_null>(other.holder_.data());
-}
-
-allocator &allocator::operator=(allocator &&other) & noexcept {
-  if (this == &other) return *this;
-  this->holder_ = other.holder_;
-  ::LIBIMP::construct<holder_null>(other.holder_.data());
-  return *this;
-}
-
 void allocator::swap(allocator &other) noexcept {
   std::swap(this->holder_, other.holder_);
 }
 
-bool allocator::valid() const noexcept {
-  return get_holder().valid();
-}
-
-allocator::operator bool() const noexcept {
-  return valid();
-}
-
-void *allocator::alloc(std::size_t s) {
-  if (!valid()) return nullptr;
-  return get_holder().alloc(s);
+void *allocator::allocate(std::size_t s, std::size_t a) const {
+  return get_holder().alloc(s, a);
 }
 
-void allocator::dealloc(void *p, std::size_t s) {
-  if (!valid()) return;
-  get_holder().dealloc(p, s);
+void allocator::deallocate(void *p, std::size_t s, std::size_t a) const {
+  get_holder().dealloc(p, s, a);
 }
 
 LIBPMR_NAMESPACE_END_
diff --git a/test/pmr/test_pmr_allocator.cpp b/test/pmr/test_pmr_allocator.cpp
index a1d2368a..8173c822 100644
--- a/test/pmr/test_pmr_allocator.cpp
+++ b/test/pmr/test_pmr_allocator.cpp
@@ -8,71 +8,71 @@
 
 TEST(allocator, construct) {
   pmr::allocator alc;
-  EXPECT_FALSE(alc.valid());
-  EXPECT_FALSE(alc);
+  SUCCEED();
 }
 
-TEST(allocator, construct_with_memory_resource) {
-  pmr::new_delete_resource mem_res;
-  pmr::allocator alc {&mem_res};
-  EXPECT_TRUE(alc.valid());
-  EXPECT_TRUE(alc);
-
-  auto p = alc.alloc(128);
+TEST(allocator, construct_value_initialization) {
+  pmr::allocator alc{};
+  auto p = alc.allocate(128);
   EXPECT_NE(p, nullptr);
-  EXPECT_NO_THROW(alc.dealloc(p, 128));
+  EXPECT_NO_THROW(alc.deallocate(p, 128));
 }
 
+namespace {
+
+class dummy_resource {
+public:
+  void *allocate(std::size_t, std::size_t = 0) noexcept {
+    return nullptr;
+  }
+  void deallocate(void *, std::size_t, std::size_t = 0) noexcept {
+    return;
+  }
+};
+
+} // namespace
+
 TEST(allocator, construct_copy_move) {
   pmr::new_delete_resource mem_res;
+  dummy_resource dummy_res;
+  pmr::allocator alc1{&mem_res}, alc2{&dummy_res};
+  auto p = alc1.allocate(128);
+  ASSERT_NE(p, nullptr);
+  ASSERT_NO_THROW(alc1.deallocate(p, 128));
+  ASSERT_EQ(alc2.allocate(128), nullptr);
+
+  pmr::allocator alc3{alc1}, alc4{alc2}, alc5{std::move(alc1)};
+
+  p = alc3.allocate(128);
+  ASSERT_NE(p, nullptr);
+  ASSERT_NO_THROW(alc3.deallocate(p, 128));
+
+  ASSERT_EQ(alc4.allocate(128), nullptr);
 
-  pmr::allocator alc1 {&mem_res}, alc2;
-  EXPECT_TRUE (alc1.valid());
-  EXPECT_TRUE (alc1);
-  EXPECT_FALSE(alc2.valid());
-  EXPECT_FALSE(alc2);
-
-  pmr::allocator alc3 {alc1}, alc4{alc2}, alc5 {std::move(alc1)};
-  EXPECT_TRUE (alc3.valid());
-  EXPECT_TRUE (alc3);
-  EXPECT_FALSE(alc4.valid());
-  EXPECT_FALSE(alc4);
-  EXPECT_TRUE (alc5.valid());
-  EXPECT_TRUE (alc5);
-  EXPECT_FALSE(alc1.valid());
-  EXPECT_FALSE(alc1);
+  p = alc5.allocate(128);
+  ASSERT_NE(p, nullptr);
+  ASSERT_NO_THROW(alc5.deallocate(p, 128));
 }
 
 TEST(allocator, swap) {
   pmr::new_delete_resource mem_res;
-
-  pmr::allocator alc1 {&mem_res}, alc2;
-  EXPECT_TRUE (alc1.valid());
-  EXPECT_TRUE (alc1);
-  EXPECT_FALSE(alc2.valid());
-  EXPECT_FALSE(alc2);
-
+  dummy_resource dummy_res;
+  pmr::allocator alc1{&mem_res}, alc2{&dummy_res};
   alc1.swap(alc2);
-  EXPECT_FALSE(alc1.valid());
-  EXPECT_FALSE(alc1);
-  EXPECT_TRUE (alc2.valid());
-  EXPECT_TRUE (alc2);
+  auto p = alc2.allocate(128);
+  ASSERT_NE(p, nullptr);
+  ASSERT_NO_THROW(alc2.deallocate(p, 128));
+  ASSERT_EQ(alc1.allocate(128), nullptr);
 }
 
 TEST(allocator, invalid_alloc_free) {
-  pmr::new_delete_resource mem_res;
-
-  pmr::allocator alc1 {&mem_res}, alc2;
-  EXPECT_EQ(alc1.alloc(0), nullptr);
-  EXPECT_NO_THROW(alc1.dealloc(nullptr, 128));
-  EXPECT_NO_THROW(alc1.dealloc(nullptr, 0));
-  EXPECT_NO_THROW(alc1.dealloc(&alc1, 0));
-
-  EXPECT_EQ(alc2.alloc(0), nullptr);
-  EXPECT_NO_THROW(alc2.dealloc(nullptr, 128));
-  EXPECT_NO_THROW(alc2.dealloc(nullptr, 0));
-  EXPECT_NO_THROW(alc2.dealloc(&alc1, 0));
+  pmr::allocator alc1;
+  EXPECT_EQ(alc1.allocate(0), nullptr);
+  EXPECT_NO_THROW(alc1.deallocate(nullptr, 128));
+  EXPECT_NO_THROW(alc1.deallocate(nullptr, 0));
+  EXPECT_NO_THROW(alc1.deallocate(&alc1, 0));
+}
 
-  EXPECT_EQ(alc2.alloc(1024), nullptr);
-  EXPECT_NO_THROW(alc2.dealloc(&alc1, sizeof(alc1)));
-}
\ No newline at end of file
+TEST(allocator, sizeof) {
+  EXPECT_EQ(sizeof(pmr::allocator), sizeof(void *) * 2);
+}
diff --git a/test/pmr/test_pmr_small_storage.cpp b/test/pmr/test_pmr_small_storage.cpp
new file mode 100644
index 00000000..e3629a33
--- /dev/null
+++ b/test/pmr/test_pmr_small_storage.cpp
@@ -0,0 +1,7 @@
+
+#include "gtest/gtest.h"
+
+#include "libpmr/small_storage.h"
+
+TEST(small_storage, construct) {
+}

From c8010e3a51474b9258bb6424ac4aafa81243be58 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 3 Sep 2023 11:43:06 +0800
Subject: [PATCH 198/272] Place holder-base into small-storage.

---
 include/libpmr/allocator.h     |   8 ++-
 include/libpmr/holder_base.h   | 122 ---------------------------------
 include/libpmr/small_storage.h | 110 ++++++++++++++++++++++++++++-
 3 files changed, 114 insertions(+), 126 deletions(-)
 delete mode 100644 include/libpmr/holder_base.h

diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index d24bab25..9acaeae4 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -62,16 +62,18 @@ class LIBIMP_EXPORT allocator {
    */
   template <typename MR>
   class holder_mr<MR, verify_memory_resource<MR>> : public holder_mr<MR, void> {
+    using base_t = holder_mr<MR, void>;
+
   public:
     holder_mr(MR *p_mr) noexcept
-      : holder_mr<MR, void>{p_mr} {}
+      : base_t{p_mr} {}
 
     void *alloc(std::size_t s, std::size_t a) const override {
-      return res_->allocate(s, a);
+      return base_t::res_->allocate(s, a);
     }
 
     void dealloc(void *p, std::size_t s, std::size_t a) const override {
-      res_->deallocate(p, s, a);
+      base_t::res_->deallocate(p, s, a);
     }
   };
 
diff --git a/include/libpmr/holder_base.h b/include/libpmr/holder_base.h
deleted file mode 100644
index fc52c6de..00000000
--- a/include/libpmr/holder_base.h
+++ /dev/null
@@ -1,122 +0,0 @@
-/**
- * \file libpmr/small_storage.h
- * \author mutouyun (orz@orzz.org)
- * \brief Unified SSO (Small Size Optimization) holder base.
- * \date 2023-09-02
- */
-#pragma once
-
-#include <type_traits>
-#include <array>
-#include <typeinfo>
-#include <utility>
-#include <cstddef>
-
-#include "libimp/export.h"
-#include "libimp/construct.h"
-#include "libimp/byte.h"
-#include "libimp/generic.h"
-
-#include "libpmr/def.h"
-
-LIBPMR_NAMESPACE_BEG_
-
-class LIBIMP_EXPORT allocator;
-
-/**
- * \class holder_base
- * \brief Data holder base class.
-*/
-class holder_base {
-public:
-  virtual ~holder_base() noexcept = default;
-  virtual bool valid() const noexcept = 0;
-  virtual std::type_info const &type() const noexcept = 0;
-  virtual std::size_t sizeof_type() const noexcept = 0;
-  virtual std::size_t count() const noexcept = 0;
-  virtual std::size_t size () const noexcept = 0;
-  virtual void *get() noexcept = 0;
-  virtual void const *get() const noexcept = 0;
-  virtual void move_to(allocator const &, void *) noexcept = 0;
-  virtual void copy_to(allocator const &, void *) const noexcept(false) = 0;
-};
-
-/**
- * \class holder_null
- * \brief A holder implementation that does not hold any data objects.
-*/
-class holder_null : public holder_base {
-public:
-  bool valid() const noexcept override { return false; }
-  std::type_info const &type() const noexcept override { return typeid(nullptr);}
-  std::size_t sizeof_type() const noexcept override { return 0; }
-  std::size_t count() const noexcept override { return 0; }
-  std::size_t size () const noexcept override { return 0; }
-  void *get() noexcept override { return nullptr; }
-  void const *get() const noexcept override { return nullptr; }
-
-  /// \brief The passed destination pointer is never null, 
-  /// and the memory to which it points is uninitialized.
-  void move_to(allocator const &, void *) noexcept override {}
-  void copy_to(allocator const &, void *) const noexcept(false) override {}
-};
-
-template <typename Value, bool/*is on stack*/>
-class holder;
-
-/**
- * \class template <typename Value> holder<Value, true>
- * \brief A holder implementation that holds a data object if type `Value` on stack memory.
- * \tparam Value The storage type of the holder.
- */
-template <typename Value>
-class holder<Value, true> : public holder_base {
-
-  alignas(alignof(Value)) std::array<::LIBIMP::byte, sizeof(Value)> value_storage_;
-
-public:
-  holder() = default; // uninitialized
-
-  template <typename... A>
-  holder(::LIBIMP::in_place_t, A &&...args) {
-    ::LIBIMP::construct<Value>(value_storage_.data(), std::forward<A>(args)...);
-  }
-
-  bool valid() const noexcept override {
-    return true;
-  }
-
-  std::type_info const &type() const noexcept override {
-    return typeid(Value);
-  }
-
-  std::size_t sizeof_type() const noexcept override {
-    return sizeof(Value);
-  }
-
-  std::size_t count() const noexcept override {
-    return 1;
-  }
-
-  std::size_t size() const noexcept override {
-    return value_storage_.size();
-  }
-
-  void *get() noexcept override {
-    return value_storage_.data();
-  }
-
-  void const *get() const noexcept override {
-    return value_storage_.data();
-  }
-
-  void move_to(allocator const &, void *p) noexcept override {
-    ::LIBIMP::construct<holder>(p, ::LIBIMP::in_place, std::move(*static_cast<Value *>(get())));
-  }
-
-  void copy_to(allocator const &, void *p) const noexcept(false) override {
-    ::LIBIMP::construct<holder>(p, ::LIBIMP::in_place, *static_cast<Value *>(get()));
-  }
-};
-
-LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
index 918dc936..eb830ecf 100644
--- a/include/libpmr/small_storage.h
+++ b/include/libpmr/small_storage.h
@@ -19,10 +19,113 @@
 #include "libimp/generic.h"
 
 #include "libpmr/def.h"
-#include "libpmr/holder_base.h"
 
 LIBPMR_NAMESPACE_BEG_
 
+class LIBIMP_EXPORT allocator;
+
+/**
+ * \class holder_base
+ * \brief Data holder base class.
+*/
+class holder_base {
+public:
+  virtual ~holder_base() noexcept = default;
+  virtual bool valid() const noexcept = 0;
+  virtual std::type_info const &type() const noexcept = 0;
+  virtual std::size_t sizeof_type() const noexcept = 0;
+  virtual std::size_t count() const noexcept = 0;
+  virtual std::size_t size () const noexcept = 0;
+  virtual void *get() noexcept = 0;
+  virtual void const *get() const noexcept = 0;
+
+  /// \brief The passed destination pointer is never null, 
+  /// and the memory to which it points is uninitialized.
+  virtual void move_to(allocator const &, void *) noexcept = 0;
+  virtual void copy_to(allocator const &, void *) const noexcept(false) = 0;
+  virtual void destroy(allocator const &) noexcept = 0;
+};
+
+/**
+ * \class holder_null
+ * \brief A holder implementation that does not hold any data objects.
+*/
+class holder_null : public holder_base {
+public:
+  bool valid() const noexcept override { return false; }
+  std::type_info const &type() const noexcept override { return typeid(nullptr);}
+  std::size_t sizeof_type() const noexcept override { return 0; }
+  std::size_t count() const noexcept override { return 0; }
+  std::size_t size () const noexcept override { return 0; }
+  void *get() noexcept override { return nullptr; }
+  void const *get() const noexcept override { return nullptr; }
+  void move_to(allocator const &, void *) noexcept override {}
+  void copy_to(allocator const &, void *) const noexcept(false) override {}
+  void destroy(allocator const &) noexcept override {}
+};
+
+template <typename Value, bool/*is on stack*/>
+class holder;
+
+/**
+ * \class template <typename Value> holder<Value, true>
+ * \brief A holder implementation that holds a data object if type `Value` on stack memory.
+ * \tparam Value The storage type of the holder.
+ */
+template <typename Value>
+class holder<Value, true> : public holder_base {
+
+  alignas(alignof(Value)) std::array<::LIBIMP::byte, sizeof(Value)> value_storage_;
+
+public:
+  holder() = default; // uninitialized
+
+  template <typename... A>
+  holder(::LIBIMP::in_place_t, A &&...args) {
+    ::LIBIMP::construct<Value>(value_storage_.data(), std::forward<A>(args)...);
+  }
+
+  bool valid() const noexcept override {
+    return true;
+  }
+
+  std::type_info const &type() const noexcept override {
+    return typeid(Value);
+  }
+
+  std::size_t sizeof_type() const noexcept override {
+    return sizeof(Value);
+  }
+
+  std::size_t count() const noexcept override {
+    return 1;
+  }
+
+  std::size_t size() const noexcept override {
+    return value_storage_.size();
+  }
+
+  void *get() noexcept override {
+    return value_storage_.data();
+  }
+
+  void const *get() const noexcept override {
+    return value_storage_.data();
+  }
+
+  void move_to(allocator const &, void *p) noexcept override {
+    ::LIBIMP::construct<holder>(p, ::LIBIMP::in_place, std::move(*static_cast<Value *>(get())));
+  }
+
+  void copy_to(allocator const &, void *p) const noexcept(false) override {
+    ::LIBIMP::construct<holder>(p, ::LIBIMP::in_place, *static_cast<Value *>(get()));
+  }
+
+  void destroy(allocator const &) noexcept override {
+    ::LIBIMP::destroy<Value>(value_storage_.data());
+  }
+};
+
 /**
  * \class template <typename Value> holder<Value, false>
  * \brief A holder implementation that holds a data object if type `Value` on heap memory.
@@ -30,6 +133,11 @@ LIBPMR_NAMESPACE_BEG_
  */
 template <typename Value>
 class holder<Value, false> : public holder_base {
+
+  Value *value_ptr_ = nullptr;
+
+public:
+  holder() = default; // uninitialized
 };
 
 LIBPMR_NAMESPACE_END_

From a50bc78678fdcf5c660ac7697e06e1da114a8d7b Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 3 Sep 2023 13:43:32 +0800
Subject: [PATCH 199/272] Continue to update holders.

---
 include/libconcur/data_model.h                |   2 +-
 include/libimp/expected.h                     |   2 +-
 include/libimp/generic.h                      |   6 +
 include/libimp/pimpl.h                        |   2 +-
 .../libimp/{construct.h => uninitialized.h}   |  43 +++-
 include/libpmr/allocator.h                    |   2 +-
 include/libpmr/small_storage.h                | 206 ++++++++++++++++--
 test/imp/test_imp_utility.cpp                 |   2 +-
 test/pmr/test_pmr_small_storage.cpp           |  79 +++++++
 9 files changed, 320 insertions(+), 24 deletions(-)
 rename include/libimp/{construct.h => uninitialized.h} (58%)

diff --git a/include/libconcur/data_model.h b/include/libconcur/data_model.h
index 514b26d9..e6865d4c 100644
--- a/include/libconcur/data_model.h
+++ b/include/libconcur/data_model.h
@@ -11,7 +11,7 @@
 #include <cstddef>
 #include <cstdint>
 
-#include "libimp/construct.h"
+#include "libimp/uninitialized.h"
 #include "libimp/detect_plat.h"
 #include "libimp/aligned.h"
 
diff --git a/include/libimp/expected.h b/include/libimp/expected.h
index 533e3552..af2ee7d4 100644
--- a/include/libimp/expected.h
+++ b/include/libimp/expected.h
@@ -13,7 +13,7 @@
 #include <cstddef>  // std::nullptr_t
 
 #include "libimp/def.h"
-#include "libimp/construct.h"
+#include "libimp/uninitialized.h"
 #include "libimp/generic.h"
 #include "libimp/byte.h"
 
diff --git a/include/libimp/generic.h b/include/libimp/generic.h
index e0301813..2106adcc 100644
--- a/include/libimp/generic.h
+++ b/include/libimp/generic.h
@@ -21,6 +21,12 @@ LIBIMP_NAMESPACE_BEG_
 template <typename...>
 using void_t = void;
 
+/**
+ * \brief A type-list for generic programming.
+*/
+template <typename...>
+struct types {};
+
 /**
  * \brief To indicate that the contained object should be constructed in-place.
  * \see https://en.cppreference.com/w/cpp/utility/in_place
diff --git a/include/libimp/pimpl.h b/include/libimp/pimpl.h
index df7787a1..d0b0b2b2 100644
--- a/include/libimp/pimpl.h
+++ b/include/libimp/pimpl.h
@@ -10,7 +10,7 @@
 #include <type_traits>
 #include <cstdint>
 
-#include "libimp/construct.h"
+#include "libimp/uninitialized.h"
 #include "libimp/def.h"
 
 LIBIMP_NAMESPACE_BEG_
diff --git a/include/libimp/construct.h b/include/libimp/uninitialized.h
similarity index 58%
rename from include/libimp/construct.h
rename to include/libimp/uninitialized.h
index 851c6578..335d0012 100644
--- a/include/libimp/construct.h
+++ b/include/libimp/uninitialized.h
@@ -1,7 +1,7 @@
 /**
- * \file libimp/construct.h
+ * \file libimp/uninitialized.h
  * \author mutouyun (orz@orzz.org)
- * \brief Construct an object from a memory buffer
+ * \brief Uninitialized memory algorithms.
  * \date 2022-02-27
  */
 #pragma once
@@ -14,6 +14,7 @@
 
 #include "libimp/def.h"
 #include "libimp/detect_plat.h"
+#include "libimp/horrible_cast.h"
 
 LIBIMP_NAMESPACE_BEG_
 
@@ -67,4 +68,42 @@ void *destroy(T (*p)[N]) noexcept {
   return p;
 }
 
+/**
+ * \brief Destroys a range of objects.
+ * \see https://en.cppreference.com/w/cpp/memory/destroy
+*/
+template <typename ForwardIt>
+void destroy(ForwardIt first, ForwardIt last) noexcept {
+#if defined(LIBIMP_CPP_17)
+  std::destroy(first, last);
+#else
+  for (; first != last; ++first) {
+    destroy(std::addressof(*first));
+  }
+#endif
+}
+
+/**
+ * \brief Constructs objects by default-initialization 
+ * in an uninitialized area of memory, defined by a start and a count.
+ * \see https://en.cppreference.com/w/cpp/memory/uninitialized_default_construct_n
+*/
+template <typename ForwardIt, typename Size>
+ForwardIt uninitialized_default_construct_n(ForwardIt first, Size n) {
+#if defined(LIBIMP_CPP_17)
+  return std::uninitialized_default_construct_n(first, n);
+#else
+  using T = typename std::iterator_traits<ForwardIt>::value_type;
+  ForwardIt current = first;
+  LIBIMP_TRY {
+    for (; n > 0; (void) ++current, --n)
+      ::new (horrible_cast<void *>(std::addressof(*current))) T;
+    return current;
+  } LIBIMP_CATCH(...) {
+    destroy(first, current);
+    LIBIMP_THROW(, first);
+  }
+#endif
+}
+
 LIBIMP_NAMESPACE_END_
diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index 9acaeae4..f12eca2f 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -10,7 +10,7 @@
 #include <array>
 
 #include "libimp/export.h"
-#include "libimp/construct.h"
+#include "libimp/uninitialized.h"
 #include "libimp/byte.h"
 
 #include "libpmr/def.h"
diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
index eb830ecf..79c613ca 100644
--- a/include/libpmr/small_storage.h
+++ b/include/libpmr/small_storage.h
@@ -14,28 +14,33 @@
 #include <cstddef>
 
 #include "libimp/export.h"
-#include "libimp/construct.h"
+#include "libimp/uninitialized.h"
 #include "libimp/byte.h"
 #include "libimp/generic.h"
 
 #include "libpmr/def.h"
+#include "libpmr/allocator.h"
 
 LIBPMR_NAMESPACE_BEG_
 
-class LIBIMP_EXPORT allocator;
-
 /**
  * \class holder_base
  * \brief Data holder base class.
 */
 class holder_base {
+
+  // non-copyable
+  holder_base(holder_base const &) = delete;
+  holder_base &operator=(holder_base const &) = delete;
+
 public:
+  holder_base() noexcept = default;
   virtual ~holder_base() noexcept = default;
   virtual bool valid() const noexcept = 0;
   virtual std::type_info const &type() const noexcept = 0;
   virtual std::size_t sizeof_type() const noexcept = 0;
+  virtual std::size_t sizeof_heap() const noexcept = 0;
   virtual std::size_t count() const noexcept = 0;
-  virtual std::size_t size () const noexcept = 0;
   virtual void *get() noexcept = 0;
   virtual void const *get() const noexcept = 0;
 
@@ -55,8 +60,8 @@ class holder_null : public holder_base {
   bool valid() const noexcept override { return false; }
   std::type_info const &type() const noexcept override { return typeid(nullptr);}
   std::size_t sizeof_type() const noexcept override { return 0; }
+  std::size_t sizeof_heap() const noexcept override { return 0; }
   std::size_t count() const noexcept override { return 0; }
-  std::size_t size () const noexcept override { return 0; }
   void *get() noexcept override { return nullptr; }
   void const *get() const noexcept override { return nullptr; }
   void move_to(allocator const &, void *) noexcept override {}
@@ -81,7 +86,7 @@ class holder<Value, true> : public holder_base {
   holder() = default; // uninitialized
 
   template <typename... A>
-  holder(::LIBIMP::in_place_t, A &&...args) {
+  holder(allocator const &, A &&...args) {
     ::LIBIMP::construct<Value>(value_storage_.data(), std::forward<A>(args)...);
   }
 
@@ -97,12 +102,12 @@ class holder<Value, true> : public holder_base {
     return sizeof(Value);
   }
 
-  std::size_t count() const noexcept override {
-    return 1;
+  std::size_t sizeof_heap() const noexcept override {
+    return 0;
   }
 
-  std::size_t size() const noexcept override {
-    return value_storage_.size();
+  std::size_t count() const noexcept override {
+    return 1;
   }
 
   void *get() noexcept override {
@@ -113,16 +118,16 @@ class holder<Value, true> : public holder_base {
     return value_storage_.data();
   }
 
-  void move_to(allocator const &, void *p) noexcept override {
-    ::LIBIMP::construct<holder>(p, ::LIBIMP::in_place, std::move(*static_cast<Value *>(get())));
+  void move_to(allocator const &alloc, void *p) noexcept override {
+    ::LIBIMP::construct<holder>(p, alloc, std::move(*static_cast<Value *>(get())));
   }
 
-  void copy_to(allocator const &, void *p) const noexcept(false) override {
-    ::LIBIMP::construct<holder>(p, ::LIBIMP::in_place, *static_cast<Value *>(get()));
+  void copy_to(allocator const &alloc, void *p) const noexcept(false) override {
+    ::LIBIMP::construct<holder>(p, alloc, *static_cast<Value const *>(get()));
   }
 
   void destroy(allocator const &) noexcept override {
-    ::LIBIMP::destroy<Value>(value_storage_.data());
+    ::LIBIMP::destroy(static_cast<Value *>(get()));
   }
 };
 
@@ -134,10 +139,177 @@ class holder<Value, true> : public holder_base {
 template <typename Value>
 class holder<Value, false> : public holder_base {
 
-  Value *value_ptr_ = nullptr;
+  Value *value_ptr_;
 
 public:
-  holder() = default; // uninitialized
+  holder() noexcept : value_ptr_(nullptr) {}
+
+  template <typename... A>
+  holder(allocator const &alloc, A &&...args) {
+    void *p = alloc.allocate(sizeof(Value), alignof(Value));
+    if (p == nullptr) return;
+    value_ptr_ = ::LIBIMP::construct<Value>(p, std::forward<A>(args)...);
+  }
+
+  bool valid() const noexcept override {
+    return value_ptr_ != nullptr;
+  }
+
+  std::type_info const &type() const noexcept override {
+    return typeid(Value);
+  }
+
+  std::size_t sizeof_type() const noexcept override {
+    return sizeof(Value);
+  }
+
+  std::size_t sizeof_heap() const noexcept override {
+    return sizeof(Value);
+  }
+
+  std::size_t count() const noexcept override {
+    return 1;
+  }
+
+  void *get() noexcept override {
+    return value_ptr_;
+  }
+
+  void const *get() const noexcept override {
+    return value_ptr_;
+  }
+
+  void move_to(allocator const &alloc, void *p) noexcept override {
+    if (value_ptr_ == nullptr) {
+      ::LIBIMP::construct<holder>(p);
+      return;
+    }
+    ::LIBIMP::construct<holder>(p, alloc, std::move(*value_ptr_));
+  }
+
+  void copy_to(allocator const &alloc, void *p) const noexcept(false) override {
+    if (value_ptr_ == nullptr) {
+      ::LIBIMP::construct<holder>(p);
+      return;
+    }
+    ::LIBIMP::construct<holder>(p, alloc, *value_ptr_);
+  }
+
+  void destroy(allocator const &alloc) noexcept override {
+    alloc.deallocate(::LIBIMP::destroy(value_ptr_), sizeof(Value), alignof(Value));
+  }
+};
+
+namespace detail {
+
+struct holder_info {
+  std::type_info const *type;
+  std::size_t sizeof_type;
+  std::size_t count;
+  void (*copy)(allocator const &, void const *s, void *d);
+};
+
+template <typename Value, typename Construct>
+void *holder_construct(allocator const &alloc, std::size_t n, Construct &&c) {
+  void *p = alloc.allocate(n * sizeof(Value));
+  if (p == nullptr) return nullptr;
+  LIBIMP_TRY {
+    std::forward<Construct>(c)(static_cast<Value *>(p), n);
+    return p;
+  } LIBIMP_CATCH(...) {
+    alloc.deallocate(p, n * sizeof(Value));
+    LIBIMP_THROW(, nullptr);
+  }
+}
+
+} // namespace detail
+
+/**
+ * \class template <> holder<void, true>
+ * \brief A holder implementation of some data objects that stores type information on stack memory.
+ */
+template <>
+class holder<void, true> : public holder_base {
+
+  detail::holder_info info_;
+  void *value_ptr_;
+
+public:
+  holder() noexcept
+    : info_{&typeid(nullptr)}
+    , value_ptr_(nullptr) {}
+
+  /// \brief Constructs a holder with type of `Value`.
+  /// alignof(Value) must be less than or equal to alignof(std::max_align_t).
+  template <typename Value, 
+            std::enable_if_t<alignof(Value) <= alignof(std::max_align_t), bool> = true>
+  holder(allocator const &alloc, ::LIBIMP::types<Value>, std::size_t n) : holder() {
+    value_ptr_ = detail::holder_construct<Value>(alloc, n, 
+      ::LIBIMP::uninitialized_default_construct_n<Value *, std::size_t>);
+    if (value_ptr_ == nullptr) return;
+    info_.type = &typeid(Value);
+    info_.sizeof_type = sizeof(Value);
+    info_.count = n;
+    info_.copy = [](allocator const &alloc, void const *s, void *d) {
+      auto const &src = *static_cast<holder const *>(s);
+      auto &      dst = *::LIBIMP::construct<holder>(d);
+      if (!src.valid()) return;
+      dst.value_ptr_ = detail::holder_construct<Value>(alloc, src.count(), [s = src.get()](Value *d, std::size_t n) {
+        std::uninitialized_copy_n(static_cast<Value const *>(s), n, d);
+      });
+      if (dst.value_ptr_ == nullptr) return;
+      dst.info_ = src.info_;
+    };
+  }
+
+  bool valid() const noexcept override {
+    return value_ptr_ != nullptr;
+  }
+
+  std::type_info const &type() const noexcept override {
+    return *info_.type;
+  }
+
+  std::size_t sizeof_type() const noexcept override {
+    return info_.sizeof_type;
+  }
+
+  std::size_t sizeof_heap() const noexcept override {
+    return info_.sizeof_type * info_.count;
+  }
+
+  std::size_t count() const noexcept override {
+    return info_.count;
+  }
+
+  void *get() noexcept override {
+    return value_ptr_;
+  }
+
+  void const *get() const noexcept override {
+    return value_ptr_;
+  }
+
+  void move_to(allocator const &, void *p) noexcept override {
+    auto *des = ::LIBIMP::construct<holder>(p);
+    if (value_ptr_ == nullptr) {
+      return;
+    }
+    std::swap(value_ptr_, des->value_ptr_);
+    std::swap(info_, des->info_);
+  }
+
+  void copy_to(allocator const &alloc, void *p) const noexcept(false) override {
+    auto *des = ::LIBIMP::construct<holder>(p);
+    if (value_ptr_ == nullptr) {
+      return;
+    }
+    info_.copy(alloc, this, des);
+  }
+
+  void destroy(allocator const &alloc) noexcept override {
+    alloc.deallocate(::LIBIMP::destroy(value_ptr_), info_.sizeof_type * info_.count);
+  }
 };
 
 LIBPMR_NAMESPACE_END_
diff --git a/test/imp/test_imp_utility.cpp b/test/imp/test_imp_utility.cpp
index 1de8bb44..3c6ba5d6 100644
--- a/test/imp/test_imp_utility.cpp
+++ b/test/imp/test_imp_utility.cpp
@@ -5,7 +5,7 @@
 
 #include "gtest/gtest.h"
 
-#include "libimp/construct.h"
+#include "libimp/uninitialized.h"
 #include "libimp/pimpl.h"
 #include "libimp/countof.h"
 #include "libimp/dataof.h"
diff --git a/test/pmr/test_pmr_small_storage.cpp b/test/pmr/test_pmr_small_storage.cpp
index e3629a33..6b5e1d9f 100644
--- a/test/pmr/test_pmr_small_storage.cpp
+++ b/test/pmr/test_pmr_small_storage.cpp
@@ -1,7 +1,86 @@
 
+#include <type_traits>
+#include <utility>
+
 #include "gtest/gtest.h"
 
 #include "libpmr/small_storage.h"
 
+TEST(small_storage, holder_construct) {
+  pmr::holder_null();
+  pmr::holder<int, true>();
+  pmr::holder<int, false>();
+  pmr::holder<void, true>();
+  SUCCEED();
+}
+
+TEST(small_storage, holder_copy_move_construct) {
+  EXPECT_FALSE(std::is_copy_constructible<pmr::holder_null>::value);
+  EXPECT_FALSE((std::is_copy_constructible<pmr::holder<int, true>>::value));
+  EXPECT_FALSE((std::is_copy_constructible<pmr::holder<int, false>>::value));
+  EXPECT_FALSE((std::is_copy_constructible<pmr::holder<void, true>>::value));
+
+  EXPECT_FALSE(std::is_copy_assignable<pmr::holder_null>::value);
+  EXPECT_FALSE((std::is_copy_assignable<pmr::holder<int, true>>::value));
+  EXPECT_FALSE((std::is_copy_assignable<pmr::holder<int, false>>::value));
+  EXPECT_FALSE((std::is_copy_assignable<pmr::holder<void, true>>::value));
+
+  EXPECT_FALSE(std::is_move_constructible<pmr::holder_null>::value);
+  EXPECT_FALSE((std::is_move_constructible<pmr::holder<int, true>>::value));
+  EXPECT_FALSE((std::is_move_constructible<pmr::holder<int, false>>::value));
+  EXPECT_FALSE((std::is_move_constructible<pmr::holder<void, true>>::value));
+
+  EXPECT_FALSE(std::is_move_assignable<pmr::holder_null>::value);
+  EXPECT_FALSE((std::is_move_assignable<pmr::holder<int, true>>::value));
+  EXPECT_FALSE((std::is_move_assignable<pmr::holder<int, false>>::value));
+  EXPECT_FALSE((std::is_move_assignable<pmr::holder<void, true>>::value));
+}
+
+TEST(small_storage, holder_copy_move) {
+  struct foo {
+    int i;
+    foo(int i) : i(i) {}
+    foo(foo const &rhs) : i(rhs.i) {}
+    foo(foo &&rhs) : i(std::exchange(rhs.i, 0)) {}
+  };
+
+  pmr::allocator alc;
+  pmr::holder<foo, true> h1(alc, 1);
+  pmr::holder<foo, true> h2, h3; // uninitialized
+  h1.copy_to(alc, &h2);
+  EXPECT_EQ(static_cast<foo *>(h1.get())->i, 1);
+  EXPECT_EQ(static_cast<foo *>(h2.get())->i, 1);
+  h1.move_to(alc, &h3);
+  EXPECT_EQ(static_cast<foo *>(h1.get())->i, 0);
+  EXPECT_EQ(static_cast<foo *>(h3.get())->i, 1);
+  h1.destroy(alc);
+  h2.destroy(alc);
+  h3.destroy(alc);
+
+  pmr::holder<foo, false> h4(alc, 1);
+  pmr::holder<foo, false> h5, h6; // uninitialized
+  h4.copy_to(alc, &h5);
+  EXPECT_EQ(static_cast<foo *>(h4.get())->i, 1);
+  EXPECT_EQ(static_cast<foo *>(h5.get())->i, 1);
+  h4.move_to(alc, &h6);
+  EXPECT_EQ(static_cast<foo *>(h4.get())->i, 0);
+  EXPECT_EQ(static_cast<foo *>(h6.get())->i, 1);
+  h4.destroy(alc);
+  h5.destroy(alc);
+  h6.destroy(alc);
+
+  pmr::holder<void, true> h7(alc, ::LIBIMP::types<int>{}, 10);
+  pmr::holder<void, true> h8, h9; // uninitialized
+  h7.copy_to(alc, &h8);
+  EXPECT_EQ(h7.count(), 10);
+  EXPECT_EQ(h8.count(), 10);
+  h7.move_to(alc, &h9);
+  EXPECT_EQ(h7.count(), 0);
+  EXPECT_EQ(h9.count(), 10);
+  h7.destroy(alc);
+  h8.destroy(alc);
+  h9.destroy(alc);
+}
+
 TEST(small_storage, construct) {
 }

From 5fec1f80ff0a1e63c122dd1c84ea932b31da0267 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 3 Sep 2023 13:54:52 +0800
Subject: [PATCH 200/272] Fix compilation errors.

---
 include/libimp/uninitialized.h | 15 +++++++++++++++
 include/libpmr/small_storage.h | 16 +++++++++-------
 2 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/include/libimp/uninitialized.h b/include/libimp/uninitialized.h
index 335d0012..7837bf93 100644
--- a/include/libimp/uninitialized.h
+++ b/include/libimp/uninitialized.h
@@ -83,6 +83,21 @@ void destroy(ForwardIt first, ForwardIt last) noexcept {
 #endif
 }
 
+/**
+ * \brief Destroys a number of objects in a range.
+ * \see https://en.cppreference.com/w/cpp/memory/destroy_n
+*/
+template <typename ForwardIt, typename Size>
+ForwardIt destroy_n(ForwardIt first, Size n) noexcept {
+#if defined(LIBIMP_CPP_17)
+  return std::destroy_n(first, n);
+#else
+  for (; n > 0; (void) ++first, --n)
+    destroy(std::addressof(*first));
+  return first;
+#endif
+}
+
 /**
  * \brief Constructs objects by default-initialization 
  * in an uninitialized area of memory, defined by a start and a count.
diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
index 79c613ca..068bab98 100644
--- a/include/libpmr/small_storage.h
+++ b/include/libpmr/small_storage.h
@@ -207,6 +207,7 @@ struct holder_info {
   std::size_t sizeof_type;
   std::size_t count;
   void (*copy)(allocator const &, void const *s, void *d);
+  void (*dest)(void *p, std::size_t n) noexcept;
 };
 
 template <typename Value, typename Construct>
@@ -260,6 +261,9 @@ class holder<void, true> : public holder_base {
       if (dst.value_ptr_ == nullptr) return;
       dst.info_ = src.info_;
     };
+    info_.dest = [](void *p, std::size_t n) noexcept {
+      ::LIBIMP::destroy_n(static_cast<Value *>(p), n);
+    };
   }
 
   bool valid() const noexcept override {
@@ -292,23 +296,21 @@ class holder<void, true> : public holder_base {
 
   void move_to(allocator const &, void *p) noexcept override {
     auto *des = ::LIBIMP::construct<holder>(p);
-    if (value_ptr_ == nullptr) {
-      return;
-    }
+    if (!valid()) return;
     std::swap(value_ptr_, des->value_ptr_);
     std::swap(info_, des->info_);
   }
 
   void copy_to(allocator const &alloc, void *p) const noexcept(false) override {
     auto *des = ::LIBIMP::construct<holder>(p);
-    if (value_ptr_ == nullptr) {
-      return;
-    }
+    if (!valid()) return;
     info_.copy(alloc, this, des);
   }
 
   void destroy(allocator const &alloc) noexcept override {
-    alloc.deallocate(::LIBIMP::destroy(value_ptr_), info_.sizeof_type * info_.count);
+    if (!valid()) return;
+    info_.dest(value_ptr_, count());
+    alloc.deallocate(value_ptr_, sizeof_heap());
   }
 };
 

From 6b22006897072f91390509a83ea1c46aa55e2d60 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 3 Sep 2023 18:11:12 +0800
Subject: [PATCH 201/272] Continue to update holders.

---
 include/libimp/codecvt.h            |   2 +-
 include/libimp/countof.h            |   2 +-
 include/libimp/dataof.h             |   2 +-
 include/libimp/export.h             |   2 +-
 include/libimp/pimpl.h              |   2 +-
 include/libimp/result.h             |   2 +-
 include/libimp/scope_exit.h         |  78 ++++++++++++++++
 include/libimp/span.h               |   2 +-
 include/libimp/system.h             |   2 +-
 include/libimp/underlyof.h          |   2 +-
 include/libpmr/small_storage.h      | 136 +++++++++++++++++++++++++++-
 test/pmr/test_pmr_small_storage.cpp |  23 ++++-
 12 files changed, 242 insertions(+), 13 deletions(-)
 create mode 100644 include/libimp/scope_exit.h

diff --git a/include/libimp/codecvt.h b/include/libimp/codecvt.h
index 1107a0a2..09931ddf 100644
--- a/include/libimp/codecvt.h
+++ b/include/libimp/codecvt.h
@@ -1,7 +1,7 @@
 /**
  * \file libimp/codecvt.h
  * \author mutouyun (orz@orzz.org)
- * \brief Character set conversion interface
+ * \brief Character set conversion interface.
  * \date 2022-08-07
  */
 #pragma once
diff --git a/include/libimp/countof.h b/include/libimp/countof.h
index 9298f8de..72df2515 100644
--- a/include/libimp/countof.h
+++ b/include/libimp/countof.h
@@ -1,7 +1,7 @@
 /**
  * \file libimp/countof.h
  * \author mutouyun (orz@orzz.org)
- * \brief Returns the size of the given range
+ * \brief Returns the size of the given range.
  * \date 2022-03-01
  */
 #pragma once
diff --git a/include/libimp/dataof.h b/include/libimp/dataof.h
index a49bd361..de19f622 100644
--- a/include/libimp/dataof.h
+++ b/include/libimp/dataof.h
@@ -1,7 +1,7 @@
 /**
  * \file libimp/dataof.h
  * \author mutouyun (orz@orzz.org)
- * \brief Returns the data pointer of the given range
+ * \brief Returns the data pointer of the given range.
  * \date 2023-05-27
  */
 #pragma once
diff --git a/include/libimp/export.h b/include/libimp/export.h
index 6ba509ca..f12d452a 100644
--- a/include/libimp/export.h
+++ b/include/libimp/export.h
@@ -1,7 +1,7 @@
 /**
  * \file libimp/export.h
  * \author mutouyun (orz@orzz.org)
- * \brief Define the symbol export interfaces
+ * \brief Define the symbol export interfaces.
  * \date 2022-02-27
  */
 #pragma once
diff --git a/include/libimp/pimpl.h b/include/libimp/pimpl.h
index d0b0b2b2..990d0de6 100644
--- a/include/libimp/pimpl.h
+++ b/include/libimp/pimpl.h
@@ -1,7 +1,7 @@
 /**
  * \file libimp/pimpl.h
  * \author mutouyun (orz@orzz.org)
- * \brief Pointer To Implementation (pImpl) idiom
+ * \brief Pointer To Implementation (pImpl) idiom.
  * \date 2022-02-27
  */
 #pragma once
diff --git a/include/libimp/result.h b/include/libimp/result.h
index 3960f88d..a859b9f4 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -1,7 +1,7 @@
 /**
  * \file libimp/result.h
  * \author mutouyun (orz@orzz.org)
- * \brief Define the return value type with a status code
+ * \brief Define the return value type with a status code.
  * \date 2022-04-17
  */
 #pragma once
diff --git a/include/libimp/scope_exit.h b/include/libimp/scope_exit.h
new file mode 100644
index 00000000..66e341f2
--- /dev/null
+++ b/include/libimp/scope_exit.h
@@ -0,0 +1,78 @@
+/**
+ * \file libimp/scope_exit.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Execute guard function when the enclosing scope exits.
+ * \date 2022-03-01
+ */
+#pragma once
+
+#include <utility>    // std::forward, std::move
+#include <functional> // std::function
+#include <type_traits>
+
+#include "libimp/def.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+template <typename F = std::function<void()>>
+class scope_exit {
+  F destructor_;
+  mutable bool released_;
+
+public:
+  template <typename G>
+  explicit scope_exit(G &&destructor) noexcept
+    : destructor_(std::forward<G>(destructor))
+    , released_  (false) {}
+
+  scope_exit(scope_exit &&other) noexcept
+    : destructor_(std::move(other.destructor_))
+    , released_  (std::exchange(other.released_, true)) /*release rhs*/ {}
+
+  scope_exit &operator=(scope_exit &&other) noexcept {
+    destructor_ = std::move(other.destructor_);
+    released_   = std::exchange(other.released_, true);
+    return *this;
+  }
+
+  ~scope_exit() noexcept {
+    if (!released_) destructor_();
+  }
+
+  void release() const noexcept {
+    released_ = true;
+  }
+
+  void do_exit() noexcept {
+    if (released_) return;
+    destructor_();
+    released_ = true;
+  }
+
+  void swap(scope_exit &other) noexcept {
+    std::swap(destructor_, other.destructor_);
+    std::swap(released_  , other.released_);
+  }
+};
+
+/// \brief Creates a scope_exit object.
+template <typename F>
+auto make_scope_exit(F &&destructor) noexcept {
+  return scope_exit<std::decay_t<F>>(std::forward<F>(destructor));
+}
+
+namespace detail {
+
+struct scope_exit_helper {
+  template <typename F>
+  auto operator=(F &&f) const noexcept {
+    return make_scope_exit(std::forward<F>(f));
+  }
+};
+
+} // namespace detail
+
+#define LIBIMP_SCOPE_EXIT($val) \
+  auto $val = ::LIBIMP::detail::scope_exit_helper{}
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/span.h b/include/libimp/span.h
index c05f79ba..fe942848 100644
--- a/include/libimp/span.h
+++ b/include/libimp/span.h
@@ -1,7 +1,7 @@
 /**
  * \file libimp/span.h
  * \author mutouyun (orz@orzz.org)
- * \brief Describes an object that can refer to a contiguous sequence of objects
+ * \brief Describes an object that can refer to a contiguous sequence of objects.
  * \date 2022-10-16
  */
 #pragma once
diff --git a/include/libimp/system.h b/include/libimp/system.h
index aed8d7cc..3517ed78 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -1,7 +1,7 @@
 /**
  * \file libimp/system.h
  * \author mutouyun (orz@orzz.org)
- * \brief Isolation and encapsulation of system APIs
+ * \brief Isolation and encapsulation of system APIs.
  * \date 2022-08-07
  */
 #pragma once
diff --git a/include/libimp/underlyof.h b/include/libimp/underlyof.h
index edef44fe..0fa4ace0 100644
--- a/include/libimp/underlyof.h
+++ b/include/libimp/underlyof.h
@@ -1,7 +1,7 @@
 /**
  * \file libimp/underlyof.h
  * \author mutouyun (orz@orzz.org)
- * \brief Returns the underlying type of the given enum
+ * \brief Returns the underlying type of the given enum.
  * \date 2022-03-01
  */
 #pragma once
diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
index 068bab98..9406a3cb 100644
--- a/include/libpmr/small_storage.h
+++ b/include/libpmr/small_storage.h
@@ -223,6 +223,39 @@ void *holder_construct(allocator const &alloc, std::size_t n, Construct &&c) {
   }
 }
 
+class holder_info_ptr {
+  allocator const &alloc_;
+  holder_info **pptr_;
+
+public:
+  holder_info_ptr(allocator const &alloc, holder_info *(&ptr)) noexcept
+    : alloc_(alloc), pptr_(&ptr) {
+    *pptr_ = static_cast<holder_info *>(alloc_.allocate(sizeof(holder_info), alignof(holder_info)));
+  }
+
+  ~holder_info_ptr() noexcept {
+    if (pptr_ == nullptr) return;
+    alloc_.deallocate(*pptr_, sizeof(holder_info), alignof(holder_info));
+    *pptr_ = nullptr;
+  }
+
+  explicit operator bool() const noexcept {
+    return (pptr_ != nullptr) && (*pptr_ != nullptr);
+  }
+
+  holder_info *operator->() const noexcept {
+    return *pptr_;
+  }
+
+  holder_info &operator*() noexcept {
+    return **pptr_;
+  }
+
+  void release() noexcept {
+    pptr_ = nullptr;
+  }
+};
+
 } // namespace detail
 
 /**
@@ -246,7 +279,7 @@ class holder<void, true> : public holder_base {
             std::enable_if_t<alignof(Value) <= alignof(std::max_align_t), bool> = true>
   holder(allocator const &alloc, ::LIBIMP::types<Value>, std::size_t n) : holder() {
     value_ptr_ = detail::holder_construct<Value>(alloc, n, 
-      ::LIBIMP::uninitialized_default_construct_n<Value *, std::size_t>);
+        ::LIBIMP::uninitialized_default_construct_n<Value *, std::size_t>);
     if (value_ptr_ == nullptr) return;
     info_.type = &typeid(Value);
     info_.sizeof_type = sizeof(Value);
@@ -271,6 +304,7 @@ class holder<void, true> : public holder_base {
   }
 
   std::type_info const &type() const noexcept override {
+    if (!valid()) return typeid(nullptr);
     return *info_.type;
   }
 
@@ -314,4 +348,104 @@ class holder<void, true> : public holder_base {
   }
 };
 
+/**
+ * \class template <> holder<void, false>
+ * \brief A holder implementation of some data objects that stores type information on heap memory.
+ */
+template <>
+class holder<void, false> : public holder_base {
+
+  detail::holder_info *info_ptr_;
+  void *value_ptr_;
+
+public:
+  holder() noexcept
+    : info_ptr_ (nullptr)
+    , value_ptr_(nullptr) {}
+
+  /// \brief Constructs a holder with type of `Value`.
+  /// alignof(Value) must be less than or equal to alignof(std::max_align_t).
+  template <typename Value, 
+            std::enable_if_t<alignof(Value) <= alignof(std::max_align_t), bool> = true>
+  holder(allocator const &alloc, ::LIBIMP::types<Value>, std::size_t n) : holder() {
+    detail::holder_info_ptr info_p{alloc, info_ptr_};
+    if (!info_p) return;
+    value_ptr_ = detail::holder_construct<Value>(alloc, n, 
+        ::LIBIMP::uninitialized_default_construct_n<Value *, std::size_t>);
+    if (value_ptr_ == nullptr) return;
+    info_p->type = &typeid(Value);
+    info_p->sizeof_type = sizeof(Value);
+    info_p->count = n;
+    info_p->copy = [](allocator const &alloc, void const *s, void *d) {
+      auto const &src = *static_cast<holder const *>(s);
+      auto &      dst = *::LIBIMP::construct<holder>(d);
+      if (!src.valid()) return;
+      detail::holder_info_ptr info_p{alloc, dst.info_ptr_};
+      if (!info_p) return;
+      dst.value_ptr_ = detail::holder_construct<Value>(alloc, src.count(), [s = src.get()](Value *d, std::size_t n) {
+        std::uninitialized_copy_n(static_cast<Value const *>(s), n, d);
+      });
+      if (dst.value_ptr_ == nullptr) return;
+      *info_p = *src.info_ptr_;
+      info_p.release();
+    };
+    info_p->dest = [](void *p, std::size_t n) noexcept {
+      ::LIBIMP::destroy_n(static_cast<Value *>(p), n);
+    };
+    info_p.release();
+  }
+
+  bool valid() const noexcept override {
+    return (value_ptr_ != nullptr) && (info_ptr_ != nullptr);
+  }
+
+  std::type_info const &type() const noexcept override {
+    if (!valid()) return typeid(nullptr);
+    return *info_ptr_->type;
+  }
+
+  std::size_t sizeof_type() const noexcept override {
+    if (!valid()) return 0;
+    return info_ptr_->sizeof_type;
+  }
+
+  std::size_t sizeof_heap() const noexcept override {
+    if (!valid()) return 0;
+    return info_ptr_->sizeof_type * info_ptr_->count + sizeof(detail::holder_info);
+  }
+
+  std::size_t count() const noexcept override {
+    if (!valid()) return 0;
+    return info_ptr_->count;
+  }
+
+  void *get() noexcept override {
+    return value_ptr_;
+  }
+
+  void const *get() const noexcept override {
+    return value_ptr_;
+  }
+
+  void move_to(allocator const &, void *p) noexcept override {
+    auto *des = ::LIBIMP::construct<holder>(p);
+    if (!valid()) return;
+    std::swap(value_ptr_, des->value_ptr_);
+    std::swap(info_ptr_ , des->info_ptr_);
+  }
+
+  void copy_to(allocator const &alloc, void *p) const noexcept(false) override {
+    auto *des = ::LIBIMP::construct<holder>(p);
+    if (!valid()) return;
+    info_ptr_->copy(alloc, this, des);
+  }
+
+  void destroy(allocator const &alloc) noexcept override {
+    if (!valid()) return;
+    info_ptr_->dest (value_ptr_, count());
+    alloc.deallocate(value_ptr_, sizeof_heap());
+    alloc.deallocate(info_ptr_ , sizeof(detail::holder_info), alignof(detail::holder_info));
+  }
+};
+
 LIBPMR_NAMESPACE_END_
diff --git a/test/pmr/test_pmr_small_storage.cpp b/test/pmr/test_pmr_small_storage.cpp
index 6b5e1d9f..6300f641 100644
--- a/test/pmr/test_pmr_small_storage.cpp
+++ b/test/pmr/test_pmr_small_storage.cpp
@@ -11,6 +11,7 @@ TEST(small_storage, holder_construct) {
   pmr::holder<int, true>();
   pmr::holder<int, false>();
   pmr::holder<void, true>();
+  pmr::holder<void, false>();
   SUCCEED();
 }
 
@@ -19,21 +20,25 @@ TEST(small_storage, holder_copy_move_construct) {
   EXPECT_FALSE((std::is_copy_constructible<pmr::holder<int, true>>::value));
   EXPECT_FALSE((std::is_copy_constructible<pmr::holder<int, false>>::value));
   EXPECT_FALSE((std::is_copy_constructible<pmr::holder<void, true>>::value));
+  EXPECT_FALSE((std::is_copy_constructible<pmr::holder<void, false>>::value));
 
   EXPECT_FALSE(std::is_copy_assignable<pmr::holder_null>::value);
   EXPECT_FALSE((std::is_copy_assignable<pmr::holder<int, true>>::value));
   EXPECT_FALSE((std::is_copy_assignable<pmr::holder<int, false>>::value));
   EXPECT_FALSE((std::is_copy_assignable<pmr::holder<void, true>>::value));
+  EXPECT_FALSE((std::is_copy_assignable<pmr::holder<void, false>>::value));
 
   EXPECT_FALSE(std::is_move_constructible<pmr::holder_null>::value);
   EXPECT_FALSE((std::is_move_constructible<pmr::holder<int, true>>::value));
   EXPECT_FALSE((std::is_move_constructible<pmr::holder<int, false>>::value));
   EXPECT_FALSE((std::is_move_constructible<pmr::holder<void, true>>::value));
+  EXPECT_FALSE((std::is_move_constructible<pmr::holder<void, false>>::value));
 
   EXPECT_FALSE(std::is_move_assignable<pmr::holder_null>::value);
   EXPECT_FALSE((std::is_move_assignable<pmr::holder<int, true>>::value));
   EXPECT_FALSE((std::is_move_assignable<pmr::holder<int, false>>::value));
   EXPECT_FALSE((std::is_move_assignable<pmr::holder<void, true>>::value));
+  EXPECT_FALSE((std::is_move_assignable<pmr::holder<void, false>>::value));
 }
 
 TEST(small_storage, holder_copy_move) {
@@ -46,7 +51,7 @@ TEST(small_storage, holder_copy_move) {
 
   pmr::allocator alc;
   pmr::holder<foo, true> h1(alc, 1);
-  pmr::holder<foo, true> h2, h3; // uninitialized
+  pmr::holder<foo, true> h2, h3;
   h1.copy_to(alc, &h2);
   EXPECT_EQ(static_cast<foo *>(h1.get())->i, 1);
   EXPECT_EQ(static_cast<foo *>(h2.get())->i, 1);
@@ -58,7 +63,7 @@ TEST(small_storage, holder_copy_move) {
   h3.destroy(alc);
 
   pmr::holder<foo, false> h4(alc, 1);
-  pmr::holder<foo, false> h5, h6; // uninitialized
+  pmr::holder<foo, false> h5, h6;
   h4.copy_to(alc, &h5);
   EXPECT_EQ(static_cast<foo *>(h4.get())->i, 1);
   EXPECT_EQ(static_cast<foo *>(h5.get())->i, 1);
@@ -70,7 +75,7 @@ TEST(small_storage, holder_copy_move) {
   h6.destroy(alc);
 
   pmr::holder<void, true> h7(alc, ::LIBIMP::types<int>{}, 10);
-  pmr::holder<void, true> h8, h9; // uninitialized
+  pmr::holder<void, true> h8, h9;
   h7.copy_to(alc, &h8);
   EXPECT_EQ(h7.count(), 10);
   EXPECT_EQ(h8.count(), 10);
@@ -80,6 +85,18 @@ TEST(small_storage, holder_copy_move) {
   h7.destroy(alc);
   h8.destroy(alc);
   h9.destroy(alc);
+
+  pmr::holder<void, false> h10(alc, ::LIBIMP::types<int>{}, 10);
+  pmr::holder<void, false> h11, h12;
+  h10.copy_to(alc, &h11);
+  EXPECT_EQ(h10.count(), 10);
+  EXPECT_EQ(h11.count(), 10);
+  h10.move_to(alc, &h12);
+  EXPECT_EQ(h10.count(), 0);
+  EXPECT_EQ(h12.count(), 10);
+  h10.destroy(alc);
+  h11.destroy(alc);
+  h12.destroy(alc);
 }
 
 TEST(small_storage, construct) {

From 2ed0614ec8c858643cbd82eff2692f268a0cca63 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 4 Sep 2023 23:37:11 +0800
Subject: [PATCH 202/272] fix ut

---
 test/imp/test_imp_byte.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/test/imp/test_imp_byte.cpp b/test/imp/test_imp_byte.cpp
index b8f9e260..c853c2ec 100644
--- a/test/imp/test_imp_byte.cpp
+++ b/test/imp/test_imp_byte.cpp
@@ -27,18 +27,18 @@ TEST(byte, construct) {
 
 TEST(byte, compare) {
   {
-    imp::byte b1, b2;
+    imp::byte b1{}, b2{};
     EXPECT_EQ(b1, b2);
   }
   {
-    imp::byte b1, b2(321);
+    imp::byte b1{}, b2(321);
     EXPECT_NE(b1, b2);
   }
 }
 
 TEST(byte, fmt) {
   {
-    imp::byte b1, b2(31);
+    imp::byte b1{}, b2(31);
     EXPECT_EQ(imp::fmt(b1), "00");
     EXPECT_EQ(imp::fmt(b2), "1f");
     EXPECT_EQ(imp::fmt(imp::spec("03X")(b2)), "01F");

From 6020739552b54feeef14545d4aaeed97c57f6128 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 9 Sep 2023 11:22:30 +0800
Subject: [PATCH 203/272] [MSVC 19] error C2259:
 'pmr::allocator::holder_mr<void *,bool>': cannot instantiate abstract class.

---
 include/libpmr/allocator.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index f12eca2f..0655a7c2 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -54,6 +54,10 @@ class LIBIMP_EXPORT allocator {
   public:
     holder_mr(MR *p_mr) noexcept
       : res_(p_mr) {}
+
+    // [MSVC 19] error C2259: 'pmr::allocator::holder_mr<void *,bool>': cannot instantiate abstract class.
+    void *alloc(std::size_t s, std::size_t a) const override { return nullptr; }
+    void dealloc(void *p, std::size_t s, std::size_t a) const override {}
   };
 
   /**

From 3d4e92a9c5ed02664ed8e1d9eeb7ba9f03f6fd87 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 9 Sep 2023 12:13:56 +0800
Subject: [PATCH 204/272] Remove the custom error_code.

---
 include/libimp/error.h               | 62 ++----------------------
 include/libimp/result.h              | 35 +++++++-------
 include/libimp/scope_exit.h          |  3 +-
 include/libimp/system.h              | 32 +++----------
 src/libimp/error.cpp                 | 70 ----------------------------
 src/libimp/platform/posix/system.h   | 50 ++++----------------
 src/libimp/platform/win/codecvt.h    |  8 ++--
 src/libimp/platform/win/system.h     | 55 +++++++++-------------
 src/libimp/system.cpp                | 29 ------------
 src/libipc/platform/posix/shm_impl.h |  2 +-
 src/libipc/platform/win/event_impl.h |  4 +-
 src/libipc/platform/win/mmap_impl.h  |  2 +-
 test/imp/test_imp_error.cpp          | 24 +---------
 test/imp/test_imp_fmt.cpp            | 18 +++----
 test/imp/test_imp_result.cpp         | 14 +++---
 test/imp/test_imp_system.cpp         | 48 +------------------
 16 files changed, 86 insertions(+), 370 deletions(-)
 delete mode 100644 src/libimp/error.cpp

diff --git a/include/libimp/error.h b/include/libimp/error.h
index 6a5e67bb..ff7fb67e 100644
--- a/include/libimp/error.h
+++ b/include/libimp/error.h
@@ -6,6 +6,7 @@
  */
 #pragma once
 
+#include <system_error>
 #include <string>
 #include <cstdint>
 
@@ -15,68 +16,13 @@
 
 LIBIMP_NAMESPACE_BEG_
 
-using error_code_t = std::uint64_t;
-constexpr error_code_t error_number_limit = error_code_t(-1);
-constexpr error_code_t no_error = 0;
-
-/**
- * \brief Serves as the base class for specific error category types.
- * \see https://en.cppreference.com/w/cpp/error/error_category
- */
-class LIBIMP_EXPORT error_category {
-public:
-  error_category(error_category const &) = delete;
-  error_category &operator=(error_category const &) = delete;
-
-  constexpr error_category() noexcept = default;
-  virtual ~error_category() noexcept = default;
-
-  /// \brief observer
-  virtual std::string name() const = 0;
-  virtual std::string message(error_code_t const &r) const = 0;
-
-  /// \brief comparison function
-  bool operator==(error_category const &rhs) const noexcept;
-};
-
-/**
- * \brief Identifies the generic error category.
- * \see https://en.cppreference.com/w/cpp/error/generic_category
- */
-LIBIMP_EXPORT error_category const &generic_category() noexcept;
-
-/**
- * \brief The error code object.
- * \see https://en.cppreference.com/w/cpp/error/error_code
- */
-class LIBIMP_EXPORT error_code {
-  error_code_t e_code_;
-  error_category const *ec_;
-
-public:
-  /// \brief constructors
-  error_code() noexcept;
-  error_code(error_code_t const &r) noexcept;
-  error_code(error_code_t const &r, error_category const &ec) noexcept;
-
-  /// \brief observers
-  error_code_t code() const noexcept;
-  error_category const &category() const noexcept;
-  std::string message() const;
-  explicit operator bool() const noexcept;
-
-  /// \brief comparison functions
-  friend LIBIMP_EXPORT bool operator==(error_code const &lhs, error_code const &rhs) noexcept;
-  friend LIBIMP_EXPORT bool operator!=(error_code const &lhs, error_code const &rhs) noexcept;
-};
-
 /**
- * \brief @brief Custom defined fmt_to method for imp::fmt
+ * \brief Custom defined fmt_to method for imp::fmt
  */
 namespace detail {
 
-inline bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, error_code r) noexcept {
-  return fmt_to(ctx, r.message());
+inline bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, std::error_code const &ec) noexcept {
+  return fmt_to(ctx, '[', ec.value(), ": ", ec.message(), ']');
 }
 
 } // namespace detail
diff --git a/include/libimp/result.h b/include/libimp/result.h
index a859b9f4..691fe32c 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -38,19 +38,19 @@ namespace detail_result {
 template <typename T>
 struct generic_traits {
   /// \typedef Combine data and valid identifiers with a tuple.
-  using storage_t = std::tuple<T, error_code>;
+  using storage_t = std::tuple<T, std::error_code>;
 
   /// \brief Custom initialization.
   constexpr static void init_code(storage_t &code) noexcept {
-    code = {0, error_number_limit/*make a default error code*/};
+    code = {0, std::make_error_code(std::errc::invalid_argument)};
   }
-  constexpr static void init_code(storage_t &code, T value, error_code const &ec) noexcept {
+  constexpr static void init_code(storage_t &code, T value, std::error_code const &ec) noexcept {
     code = {value, ec};
   }
   constexpr static void init_code(storage_t &code, T value) noexcept {
     code = {value, {}};
   }
-  constexpr static void init_code(storage_t &code, error_code const &ec) noexcept {
+  constexpr static void init_code(storage_t &code, std::error_code const &ec) noexcept {
     code = {{}, ec};
   }
 
@@ -61,7 +61,7 @@ struct generic_traits {
   constexpr static bool get_ok(storage_t const &code) noexcept {
     return !std::get<1>(code);
   }
-  constexpr static error_code get_error(storage_t const &code) noexcept {
+  constexpr static std::error_code get_error(storage_t const &code) noexcept {
     return std::get<1>(code);
   }
 };
@@ -69,13 +69,13 @@ struct generic_traits {
 template <typename ___>
 struct default_traits<void, ___> {
   /// \typedef Use the `error_code` as the storage type.
-  using storage_t = error_code;
+  using storage_t = std::error_code;
 
   /// \brief Custom initialization.
   constexpr static void init_code(storage_t &code) noexcept {
-    code = error_number_limit/*make a default error code*/;
+    code = std::make_error_code(std::errc::invalid_argument);
   }
-  constexpr static void init_code(storage_t &code, error_code const &ec) noexcept {
+  constexpr static void init_code(storage_t &code, std::error_code const &ec) noexcept {
     code = ec;
   }
 
@@ -83,7 +83,7 @@ struct default_traits<void, ___> {
   constexpr static bool get_ok(storage_t const &code) noexcept {
     return !code;
   }
-  constexpr static error_code get_error(storage_t const &code) noexcept {
+  constexpr static std::error_code get_error(storage_t const &code) noexcept {
     return code;
   }
 
@@ -96,8 +96,7 @@ struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> : generic
   /// \brief Custom initialization.
   constexpr static void init_code(typename generic_traits<T>::storage_t &code, 
                                   T value, bool ok) noexcept {
-    code = {value, static_cast<error_code_t>(ok ? 0 : 
-                                  ((value == 0) ? error_number_limit : value))};
+    code = {value, ok ? std::error_code() : std::make_error_code(std::errc::invalid_argument)};
   }
   using generic_traits<T>::init_code;
 
@@ -109,12 +108,12 @@ template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> : generic_traits<T> {
   /// \brief Custom initialization.
   constexpr static void init_code(typename generic_traits<T>::storage_t &code, 
-                                  std::nullptr_t, error_code const &ec) noexcept {
+                                  std::nullptr_t, std::error_code const &ec) noexcept {
     code = {nullptr, ec};
   }
   constexpr static void init_code(typename generic_traits<T>::storage_t &code, 
                                   std::nullptr_t) noexcept {
-    code = {nullptr, -1};
+    code = {nullptr, std::make_error_code(std::errc::invalid_argument)};
   }
   using generic_traits<T>::init_code;
 
@@ -146,9 +145,9 @@ class result : public TypeTraits {
     type_traits_t::init_code(code_, std::forward<A>(args)...);
   }
 
-  T          value() const noexcept { return type_traits_t::get_value(code_); }
-  bool       ok   () const noexcept { return type_traits_t::get_ok   (code_); }
-  error_code error() const noexcept { return type_traits_t::get_error(code_); }
+  T               value() const noexcept { return type_traits_t::get_value(code_); }
+  bool            ok   () const noexcept { return type_traits_t::get_ok   (code_); }
+  std::error_code error() const noexcept { return type_traits_t::get_error(code_); }
 
          T operator *   () const noexcept { return value(); }
   explicit operator bool() const noexcept { return ok   (); }
@@ -175,8 +174,8 @@ class result<void, TypeTraits> {
     type_traits_t::init_code(code_, std::forward<A>(args)...);
   }
 
-  bool       ok   () const noexcept { return type_traits_t::get_ok   (code_); }
-  error_code error() const noexcept { return type_traits_t::get_error(code_); }
+  bool            ok   () const noexcept { return type_traits_t::get_ok   (code_); }
+  std::error_code error() const noexcept { return type_traits_t::get_error(code_); }
 
   explicit operator bool() const noexcept { return ok(); }
 
diff --git a/include/libimp/scope_exit.h b/include/libimp/scope_exit.h
index 66e341f2..382c44a6 100644
--- a/include/libimp/scope_exit.h
+++ b/include/libimp/scope_exit.h
@@ -11,6 +11,7 @@
 #include <type_traits>
 
 #include "libimp/def.h"
+#include "libimp/detect_plat.h"
 
 LIBIMP_NAMESPACE_BEG_
 
@@ -73,6 +74,6 @@ struct scope_exit_helper {
 } // namespace detail
 
 #define LIBIMP_SCOPE_EXIT($val) \
-  auto $val = ::LIBIMP::detail::scope_exit_helper{}
+  LIBIMP_UNUSED auto $val = ::LIBIMP::detail::scope_exit_helper{}
 
 LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/system.h b/include/libimp/system.h
index 3517ed78..6dc9fbd7 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -18,35 +18,17 @@
 LIBIMP_NAMESPACE_BEG_
 namespace sys {
 
-/**
- * \brief Get/Set the system error number
- */
-LIBIMP_EXPORT error_code_t error_no() noexcept;
-LIBIMP_EXPORT void error_no(error_code_t const &) noexcept;
-
-/**
- * \brief Gets a text description of the system error
- */
-LIBIMP_EXPORT std::string error_str(error_code_t const &) noexcept;
-
-/**
- * \brief Identifies the operating system error category.
- * \see https://en.cppreference.com/w/cpp/error/system_category
- */
-LIBIMP_EXPORT error_category const &category() noexcept;
-
-/**
- * \brief A platform-dependent error code.
- * \see https://en.cppreference.com/w/cpp/error/error_code
- */
-LIBIMP_EXPORT error_code error() noexcept;
+/// \brief A platform-dependent error code.
+LIBIMP_EXPORT std::error_code error() noexcept;
 
-/**
- * \brief Get system configuration information at run time
- */
+/// \enum The name of the `conf()` argument used to inquire about its value.
+/// \brief Certain options are supported, 
+/// or what the value is of certain configurable constants or limits.
 enum class info : std::int32_t {
   page_size,
 };
+
+/// \brief Get system configuration information at run time.
 LIBIMP_EXPORT result<std::int64_t> conf(info) noexcept;
 
 } // namespace sys
diff --git a/src/libimp/error.cpp b/src/libimp/error.cpp
deleted file mode 100644
index a90ef2b8..00000000
--- a/src/libimp/error.cpp
+++ /dev/null
@@ -1,70 +0,0 @@
-#include <typeinfo>
-
-#include "libimp/error.h"
-#include "libimp/fmt.h"
-
-LIBIMP_NAMESPACE_BEG_
-
-bool error_category::operator==(error_category const &rhs) const noexcept {
-  return typeid(*this) == typeid(rhs);
-}
-
-namespace {
-
-class generic_error_category : public error_category {
-public:
-  std::string name() const {
-    return "generic";
-  }
-  std::string message(error_code_t const &r) const {
-    if (r == error_number_limit) {
-      return "0, \"failure\"";
-    }
-    if (r == error_code_t(0)) {
-      return "0, \"success\"";
-    }
-    return fmt(r, ", \"failure\"");
-  }
-};
-
-} // namespace
-
-error_category const &generic_category() noexcept {
-  static generic_error_category ec;
-  return ec;
-}
-
-error_code::error_code() noexcept
-  : error_code{0, generic_category()} {}
-
-error_code::error_code(error_code_t const &r) noexcept
-  : error_code{r, generic_category()} {}
-
-error_code::error_code(error_code_t const &r, error_category const &ec) noexcept
-  : e_code_{r}, ec_{&ec} {}
-
-error_code_t error_code::code() const noexcept {
-  return e_code_;
-}
-
-error_category const &error_code::category() const noexcept {
-  return *ec_;
-}
-
-std::string error_code::message() const {
-  return fmt("[", ec_->name(), ": ", ec_->message(e_code_), "]");
-}
-
-error_code::operator bool() const noexcept {
-  return e_code_ != 0;
-}
-
-bool operator==(error_code const &lhs, error_code const &rhs) noexcept {
-  return (lhs.e_code_ == rhs.e_code_) && (*lhs.ec_ == *rhs.ec_);
-}
-
-bool operator!=(error_code const &lhs, error_code const &rhs) noexcept {
-  return !(lhs == rhs);
-}
-
-LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index fab18b79..404077a1 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -14,47 +14,13 @@
 LIBIMP_NAMESPACE_BEG_
 namespace sys {
 
-#ifndef ENOERR
-#define ENOERR (0)
-#endif
-
 /**
- * \brief Get the system error number
- * https://man7.org/linux/man-pages/man3/errno.3.html
- */
-error_code_t error_no() noexcept {
-  auto err = errno;
-  if (err == ENOERR) return {ENOERR};
-  return error_code_t(err);
-}
-
-/**
- * \brief Set the system error number
- * https://man7.org/linux/man-pages/man3/errno.3.html
- */
-void error_no(error_code_t const &code) noexcept {
-  errno = (code == 0) ? ENOERR : (int)code;
-}
-
-/**
- * \brief Gets a text description of the system error
- * https://man7.org/linux/man-pages/man3/strerror_l.3.html
- * https://manpages.ubuntu.com/manpages/xenial/en/man3/strerror.3.html
- */
-std::string error_str(error_code_t const &code) noexcept {
-  char msg_buf[256] {};
-#if ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE)
-  LIBIMP_LOG_();
-  if (::strerror_r((int)code, msg_buf, sizeof(msg_buf)) != 0) {
-    log.error("failed: strerror_r(code = ", (int)code, 
-                      ", buf, buf-size = ", sizeof(msg_buf), 
-                      "). error = ", error_code());
-    return {};
-  }
-  return msg_buf;
-#else
-  return ::strerror_r((int)code, msg_buf, sizeof(msg_buf));
-#endif
+ * \brief Get the system error number.
+ * \see https://en.cppreference.com/w/cpp/error/generic_category
+ *      https://man7.org/linux/man-pages/man3/errno.3.html
+*/
+std::error_code error() noexcept {
+  return std::error_code(errno, std::generic_category());
 }
 
 /**
@@ -67,7 +33,7 @@ result<std::int64_t> conf(info r) noexcept {
   switch (r) {
   case info::page_size: {
     auto val = ::sysconf(_SC_PAGESIZE);
-    if (val >= 0) return (std::int64_t)val;
+    if (val >= 0) return static_cast<std::int64_t>(val);
     break;
   }
   default:
@@ -76,7 +42,7 @@ result<std::int64_t> conf(info r) noexcept {
   }
   auto err = sys::error();
   log.error("info = ", underlyof(r), ", error = ", err);
-  return {false, (int)err.code()};
+  return {false, err};
 }
 
 } // namespace sys
diff --git a/src/libimp/platform/win/codecvt.h b/src/libimp/platform/win/codecvt.h
index 42467291..e48db93f 100644
--- a/src/libimp/platform/win/codecvt.h
+++ b/src/libimp/platform/win/codecvt.h
@@ -36,7 +36,7 @@ std::size_t cvt_cstr(char const *src, std::size_t slen, wchar_t *des, std::size_
   int cch_wc = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::MultiByteToWideChar(CP_ACP, 0, src, (int)slen, des, cch_wc);
   if (size_needed <= 0) {
-    log.error("failed: MultiByteToWideChar(CP_ACP). error = ", sys::error_no());
+    log.error("failed: MultiByteToWideChar(CP_ACP). error = ", sys::error());
   }
   return size_needed;
 }
@@ -51,7 +51,7 @@ std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char *des, std::size_
   int cb_mb = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::WideCharToMultiByte(CP_ACP, 0, src, (int)slen, des, cb_mb, NULL, NULL);
   if (size_needed <= 0) {
-    log.error("failed: WideCharToMultiByte(CP_ACP). error = ", sys::error_no());
+    log.error("failed: WideCharToMultiByte(CP_ACP). error = ", sys::error());
   }
   return size_needed;
 }
@@ -73,7 +73,7 @@ std::size_t cvt_cstr(char8_t const *src, std::size_t slen, wchar_t *des, std::si
   int cch_wc = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::MultiByteToWideChar(CP_UTF8, 0, (char *)src, (int)slen, des, cch_wc);
   if (size_needed <= 0) {
-    log.error("failed: MultiByteToWideChar(CP_UTF8). error = ", sys::error_code());
+    log.error("failed: MultiByteToWideChar(CP_UTF8). error = ", sys::error());
   }
   return size_needed;
 }
@@ -88,7 +88,7 @@ std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char8_t *des, std::si
   int cb_mb = (des == nullptr) ? 0 : (int)dlen;
   int size_needed = ::WideCharToMultiByte(CP_UTF8, 0, src, (int)slen, (char *)des, cb_mb, NULL, NULL);
   if (size_needed <= 0) {
-    log.error("failed: WideCharToMultiByte(CP_UTF8). error = ", sys::error_code());
+    log.error("failed: WideCharToMultiByte(CP_UTF8). error = ", sys::error());
   }
   return size_needed;
 }
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index 8d59e084..19c20430 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -5,7 +5,6 @@
 #pragma once
 
 #include <exception>
-#include <memory>
 #include <type_traits>
 
 #include <Windows.h>
@@ -16,56 +15,33 @@
 #include "libimp/codecvt.h"
 #include "libimp/underlyof.h"
 #include "libimp/detect_plat.h"
+#include "libimp/scope_exit.h"
 
 LIBIMP_NAMESPACE_BEG_
 namespace sys {
-
-/**
- * \brief Get the system error number
- * https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-getlasterror
- */
-error_code_t error_no() noexcept {
-  auto err = ::GetLastError();
-  if (err == ERROR_SUCCESS) {
-    return {ERROR_SUCCESS};
-  }
-  return error_code_t(err);
-}
-
-/**
- * \brief Set the system error number
- * https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-setlasterror
- */
-void error_no(error_code_t const &code) noexcept {
-  DWORD err = (code == 0) ? ERROR_SUCCESS : (DWORD)code;
-  ::SetLastError(err);
-}
+namespace {
 
 /**
  * \brief Gets a text description of the system error
- * https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-formatmessage
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-formatmessage
  */
-std::string error_str(error_code_t const &code) noexcept {
+std::string error_string(DWORD code) noexcept {
   LIBIMP_LOG_();
   LIBIMP_TRY {
-    DWORD err = (DWORD)code;
     LPTSTR lpErrText = NULL;
     if (::FormatMessage(
           FORMAT_MESSAGE_ALLOCATE_BUFFER | 
           FORMAT_MESSAGE_FROM_SYSTEM | 
           FORMAT_MESSAGE_IGNORE_INSERTS,
           NULL,
-          err,
+          code,
           MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
           (LPTSTR)&lpErrText,
           0, NULL) == 0) {
-      log.error("failed: FormatMessage(dwMessageId = ", err, "). error = ", error_code());
+      log.error("failed: FormatMessage(dwMessageId = ", code, "). error = ", ::GetLastError());
       return {};
     }
-    LIBIMP_UNUSED auto buf_guard = std::unique_ptr<std::remove_pointer_t<LPVOID>, 
-                                                   void(*)(LPVOID)> {
-      lpErrText, [](LPVOID lp) { ::LocalFree(lp); }
-    };
+    LIBIMP_SCOPE_EXIT(finally) = [lpErrText] { ::LocalFree(lpErrText); };
     std::size_t msg_len = ::_tcslen(lpErrText);
     std::size_t len = cvt_cstr(lpErrText, msg_len, (char *)nullptr, 0);
     if (len == 0) {
@@ -80,10 +56,21 @@ std::string error_str(error_code_t const &code) noexcept {
   return {};
 }
 
+} // namespace
+
+/**
+ * \brief Get the system error number.
+ * \see https://en.cppreference.com/w/cpp/error/system_category
+ *      https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-getlasterror
+*/
+std::error_code error() noexcept {
+  return std::error_code(::GetLastError(), std::system_category());
+}
+
 /**
- * \brief Retrieves information about the current system
- * https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsysteminfo
- * https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getnativesysteminfo
+ * \brief Retrieves information about the current system.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsysteminfo
+ *      https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getnativesysteminfo
  */
 result<std::int64_t> conf(info r) noexcept {
   LIBIMP_LOG_();
diff --git a/src/libimp/system.cpp b/src/libimp/system.cpp
index 2ec307a5..c9441648 100644
--- a/src/libimp/system.cpp
+++ b/src/libimp/system.cpp
@@ -7,32 +7,3 @@
 #else
 # include "libimp/platform/posix/system.h"
 #endif
-
-namespace {
-
-class system_error_category : public ::LIBIMP::error_category {
-public:
-  std::string name() const {
-    return "system";
-  }
-  std::string message(::LIBIMP::error_code_t const &r) const {
-    return ::LIBIMP::fmt(r, ::LIBIMP::sys::error_str(r));
-  }
-};
-
-} // namespace
-
-LIBIMP_NAMESPACE_BEG_
-namespace sys {
-
-error_category const &category() noexcept {
-  static system_error_category ec;
-  return ec;
-}
-
-error_code error() noexcept {
-  return error_code{error_no(), category()};
-}
-
-} // namespace sys
-LIBIMP_NAMESPACE_END_
diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
index 60f302cd..661027f9 100644
--- a/src/libipc/platform/posix/shm_impl.h
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -161,7 +161,7 @@ result<void> shm_close(shm_t h) noexcept {
   }
   /// \brief no unlink the file.
   delete shm;
-  return no_error;
+  return std::error_code{};
 }
 
 LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/event_impl.h b/src/libipc/platform/win/event_impl.h
index 90e1f648..73ffbc8e 100644
--- a/src/libipc/platform/win/event_impl.h
+++ b/src/libipc/platform/win/event_impl.h
@@ -70,7 +70,7 @@ result<void> evt_close(evt_t evt) noexcept {
     log.error("failed: CloseHandle(", evt->h_event, "). error = ", err);
     return err;
   }
-  return no_error;
+  return std::error_code{};
 }
 
 /**
@@ -88,7 +88,7 @@ result<void> evt_set(evt_t evt) noexcept {
     log.error("failed: SetEvent(", evt->h_event, "). error = ", err);
     return err;
   }
-  return no_error;
+  return std::error_code{};
 }
 
 /**
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index 962dc2f0..e302a31e 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -44,7 +44,7 @@ result<void> mmap_close(HANDLE h) {
     log.error("failed: CloseHandle(", h, "). error = ", err);
     return err;
   }
-  return no_error;
+  return std::error_code{};
 }
 
 /**
diff --git a/test/imp/test_imp_error.cpp b/test/imp/test_imp_error.cpp
index 95347435..86938909 100644
--- a/test/imp/test_imp_error.cpp
+++ b/test/imp/test_imp_error.cpp
@@ -6,29 +6,9 @@
 #include "libimp/result.h"
 #include "libimp/fmt.h"
 
-namespace {
-
-class custom_error_category : public imp::error_category {
-public:
-  std::string name() const {
-    return "custom";
-  }
-  std::string message(imp::error_code_t const &r) const {
-    return (r == 0) ? "success" : "failure";
-  }
-};
-
-} // namespace
-
 TEST(error, error_code) {
-  imp::error_code ecode;
+  std::error_code ecode;
   EXPECT_FALSE(ecode);
   std::cout << ecode.message() << "\n";
   EXPECT_EQ(ecode.message(), "[generic: 0, \"success\"]");
-
-  custom_error_category cec;
-  ecode = {123, cec};
-  EXPECT_TRUE(ecode);
-  std::cout << ecode.message() << "\n";
-  EXPECT_EQ(ecode.message(), imp::fmt("[", cec.name(), ": ", cec.message(123), "]"));
-}
\ No newline at end of file
+}
diff --git a/test/imp/test_imp_fmt.cpp b/test/imp/test_imp_fmt.cpp
index 3a50a660..4f1634cf 100644
--- a/test/imp/test_imp_fmt.cpp
+++ b/test/imp/test_imp_fmt.cpp
@@ -25,19 +25,19 @@ TEST(fmt, to_string) {
     EXPECT_EQ(joined, std::forward<decltype(txt)>(txt));
   };
 
-  /// @brief string
+  /// \brief string
   check("", "");
   check("%what%", "%what%");
   check("    %what%", "%what%", "10");
   check("%what%    ", "%what%", "-10");
 
-  /// @brief character
+  /// \brief character
   check("A", 'A');
   check("A", L'A');
   check("A", u'A');
   check("A", U'A');
 
-  /// @brief numeric
+  /// \brief numeric
   check("123"       , (signed char)123      );
   check("-65"       , (signed char)-321     );
   check("123"       , (unsigned char)123    );
@@ -63,7 +63,7 @@ TEST(fmt, to_string) {
   check("1CAAB5C3B3", 123123123123ll, "X"   );
   check("1CAAB5C3B3", 123123123123ull, "X"  );
 
-  /// @brief floating point
+  /// \brief floating point
   check("123.123"     , 123.123f, ".3");
   check("0123.12300"  , 123.123, "010.5");
   check("123.123000"  , 123.123l, "010.6");
@@ -75,13 +75,13 @@ TEST(fmt, to_string) {
   ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 1.0/r)); ctx.finish();
   std::cout << joined << "\n";
 
-  /// @brief pointer
+  /// \brief pointer
   check("null", nullptr);
   int *p = (int *)0x0f013a04;
   ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (void *)p)); ctx.finish();
   std::cout << joined << "\n";
 
-  /// @brief date and time
+  /// \brief date and time
   auto tp = std::chrono::system_clock::now();
   auto tt = std::chrono::system_clock::to_time_t(tp);
   auto tm = *std::localtime(&tt);
@@ -95,14 +95,14 @@ TEST(fmt, to_string) {
 TEST(fmt, fmt) {
   char const txt[] = "hello world.";
 
-  /// @brief hello world
+  /// \brief hello world
   auto s = imp::fmt("hello", " ", "world", ".");
   EXPECT_EQ(s, txt);
 
-  /// @brief chrono
+  /// \brief chrono
   std::cout << imp::fmt('[', std::chrono::system_clock::now(), "] ", s) << "\n";
 
-  /// @brief long string
+  /// \brief long string
   s = imp::fmt(imp::spec("4096")(txt));
   std::string test(4096, ' ');
   std::memcpy(&test[test.size() - sizeof(txt) + 1], txt, sizeof(txt) - 1);
diff --git a/test/imp/test_imp_result.cpp b/test/imp/test_imp_result.cpp
index 2c07a0ce..dd6248a1 100644
--- a/test/imp/test_imp_result.cpp
+++ b/test/imp/test_imp_result.cpp
@@ -50,15 +50,15 @@ TEST(result, ok) {
 
   imp::result<void> r1;
   EXPECT_FALSE(r1);
-  r1 = 0;
+  r1 = std::error_code{};
   EXPECT_TRUE(r1);
   r1 = {};
   EXPECT_FALSE(r1);
-  r1 = 9999;
+  r1 = std::error_code{9999, std::generic_category()};
   EXPECT_FALSE(r1);
-  EXPECT_EQ(r1.error(), 9999);
+  EXPECT_EQ(r1.error().value(), 9999);
 
-  imp::result<int *> r2 {nullptr, 4321};
+  imp::result<int *> r2 {nullptr, std::error_code{4321, std::generic_category()}};
   EXPECT_NE(r2, nullptr); // imp::result<int *>{nullptr}
   EXPECT_EQ(*r2, nullptr);
   EXPECT_FALSE(r2);
@@ -103,7 +103,7 @@ TEST(result, fmt) {
     EXPECT_EQ(imp::fmt(r3), imp::fmt("succ, value = ", (void *)&aaa));
     imp::result<int *> r4 {nullptr};
     EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = [generic: 0, \"failure\"]"));
-    r4 = {nullptr, 1234};
+    r4 = {nullptr, std::error_code{1234, std::generic_category()}};
     EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = [generic: 1234, \"failure\"]"));
     imp::result<int *> r5;
     EXPECT_EQ(imp::fmt(r5), "fail, value = null, error = [generic: 0, \"failure\"]");
@@ -115,8 +115,8 @@ TEST(result, fmt) {
   {
     imp::result<void> r1;
     EXPECT_EQ(imp::fmt(r1), "fail, error = [generic: 0, \"failure\"]");
-    r1 = 0;
+    r1 = std::error_code{};
     EXPECT_TRUE(r1);
     EXPECT_EQ(imp::fmt(r1), "succ, error = [generic: 0, \"success\"]");
   }
-}
\ No newline at end of file
+}
diff --git a/test/imp/test_imp_system.cpp b/test/imp/test_imp_system.cpp
index 1649a6d9..51500b88 100644
--- a/test/imp/test_imp_system.cpp
+++ b/test/imp/test_imp_system.cpp
@@ -14,54 +14,8 @@
 #else
 #endif
 
-TEST(system, error_no) {
-  imp::sys::error_no(111);
-  auto err = imp::sys::error_no();
-  EXPECT_FALSE(err == 0);
-  EXPECT_EQ(err, 111);
-
-  imp::sys::error_no({});
-  EXPECT_TRUE(imp::sys::error_no() == 0);
-
-  auto e_msg = imp::sys::error_str(imp::sys::error_no());
-  std::cout << e_msg << "\n";
-}
-
-TEST(system, error_str) {
-#if defined(LIBIMP_OS_WIN)
-  std::wstring u16_ok, u16_err;
-  LANGID lId = ::GetSystemDefaultLangID();
-  switch (lId) {
-  case 0x0804:
-    u16_ok  = L"操作成功完成。\r\n";
-    u16_err = L"句柄无效。\r\n";
-    break;
-  case 0x0409:
-    u16_ok  = L"The operation completed successfully.\r\n";
-    u16_err = L"The handle is invalid.\r\n";
-    break;
-  default:
-    return;
-  }
-  {
-    std::string s_txt;
-    imp::cvt_sstr(u16_ok, s_txt);
-    EXPECT_EQ(imp::sys::error_str({}), s_txt);
-  }
-  {
-    std::string s_txt;
-    imp::cvt_sstr(u16_err, s_txt);
-    EXPECT_EQ(imp::sys::error_str(ERROR_INVALID_HANDLE), s_txt);
-  }
-#else
-  EXPECT_EQ(imp::sys::error_str(1234), "Unknown error 1234");
-  EXPECT_EQ(imp::sys::error_str({}), "Success");
-  EXPECT_EQ(imp::sys::error_str(EINVAL), "Invalid argument");
-#endif
-}
-
 TEST(system, conf) {
   auto ret = imp::sys::conf(imp::sys::info::page_size);
   EXPECT_TRUE(ret);
   EXPECT_EQ(ret.value(), 4096);
-}
\ No newline at end of file
+}

From d0af950071d34e2f3a4ab1b365397332193a03f6 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 9 Sep 2023 12:27:15 +0800
Subject: [PATCH 205/272] Adjust the default behavior of `result`.

---
 include/libimp/result.h      |  8 ++++----
 test/imp/test_imp_error.cpp  |  2 +-
 test/imp/test_imp_result.cpp | 10 +++++-----
 test/imp/test_imp_system.cpp |  5 -----
 4 files changed, 10 insertions(+), 15 deletions(-)

diff --git a/include/libimp/result.h b/include/libimp/result.h
index 691fe32c..c8f90d73 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -42,7 +42,7 @@ struct generic_traits {
 
   /// \brief Custom initialization.
   constexpr static void init_code(storage_t &code) noexcept {
-    code = {0, std::make_error_code(std::errc::invalid_argument)};
+    code = {0, std::error_code(-1, std::generic_category())};
   }
   constexpr static void init_code(storage_t &code, T value, std::error_code const &ec) noexcept {
     code = {value, ec};
@@ -73,7 +73,7 @@ struct default_traits<void, ___> {
 
   /// \brief Custom initialization.
   constexpr static void init_code(storage_t &code) noexcept {
-    code = std::make_error_code(std::errc::invalid_argument);
+    code = std::error_code(-1, std::generic_category());
   }
   constexpr static void init_code(storage_t &code, std::error_code const &ec) noexcept {
     code = ec;
@@ -96,7 +96,7 @@ struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> : generic
   /// \brief Custom initialization.
   constexpr static void init_code(typename generic_traits<T>::storage_t &code, 
                                   T value, bool ok) noexcept {
-    code = {value, ok ? std::error_code() : std::make_error_code(std::errc::invalid_argument)};
+    code = {value, ok ? std::error_code() : std::error_code(-1, std::generic_category())};
   }
   using generic_traits<T>::init_code;
 
@@ -113,7 +113,7 @@ struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> : generic_
   }
   constexpr static void init_code(typename generic_traits<T>::storage_t &code, 
                                   std::nullptr_t) noexcept {
-    code = {nullptr, std::make_error_code(std::errc::invalid_argument)};
+    code = {nullptr, std::error_code(-1, std::generic_category())};
   }
   using generic_traits<T>::init_code;
 
diff --git a/test/imp/test_imp_error.cpp b/test/imp/test_imp_error.cpp
index 86938909..8dfb4eff 100644
--- a/test/imp/test_imp_error.cpp
+++ b/test/imp/test_imp_error.cpp
@@ -10,5 +10,5 @@ TEST(error, error_code) {
   std::error_code ecode;
   EXPECT_FALSE(ecode);
   std::cout << ecode.message() << "\n";
-  EXPECT_EQ(ecode.message(), "[generic: 0, \"success\"]");
+  EXPECT_EQ(ecode.message(), "Success");
 }
diff --git a/test/imp/test_imp_result.cpp b/test/imp/test_imp_result.cpp
index dd6248a1..efe23b68 100644
--- a/test/imp/test_imp_result.cpp
+++ b/test/imp/test_imp_result.cpp
@@ -102,11 +102,11 @@ TEST(result, fmt) {
     imp::result<int *> r3 {&aaa};
     EXPECT_EQ(imp::fmt(r3), imp::fmt("succ, value = ", (void *)&aaa));
     imp::result<int *> r4 {nullptr};
-    EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = [generic: 0, \"failure\"]"));
+    EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = [-1: Unknown error -1]"));
     r4 = {nullptr, std::error_code{1234, std::generic_category()}};
-    EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = [generic: 1234, \"failure\"]"));
+    EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = [1234: Unknown error 1234]"));
     imp::result<int *> r5;
-    EXPECT_EQ(imp::fmt(r5), "fail, value = null, error = [generic: 0, \"failure\"]");
+    EXPECT_EQ(imp::fmt(r5), "fail, value = null, error = [-1: Unknown error -1]");
   }
   {
     imp::result<std::int64_t> r1 {-123};
@@ -114,9 +114,9 @@ TEST(result, fmt) {
   }
   {
     imp::result<void> r1;
-    EXPECT_EQ(imp::fmt(r1), "fail, error = [generic: 0, \"failure\"]");
+    EXPECT_EQ(imp::fmt(r1), "fail, error = [-1: Unknown error -1]");
     r1 = std::error_code{};
     EXPECT_TRUE(r1);
-    EXPECT_EQ(imp::fmt(r1), "succ, error = [generic: 0, \"success\"]");
+    EXPECT_EQ(imp::fmt(r1), "succ, error = [0: Success]");
   }
 }
diff --git a/test/imp/test_imp_system.cpp b/test/imp/test_imp_system.cpp
index 51500b88..6ac26297 100644
--- a/test/imp/test_imp_system.cpp
+++ b/test/imp/test_imp_system.cpp
@@ -9,11 +9,6 @@
 #include "libimp/codecvt.h"
 #include "libimp/fmt.h"
 
-#if defined(LIBIMP_OS_WIN)
-#include <Windows.h>
-#else
-#endif
-
 TEST(system, conf) {
   auto ret = imp::sys::conf(imp::sys::info::page_size);
   EXPECT_TRUE(ret);

From a56a0cd64319cabefefac573ee45e6e6c0972540 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 9 Sep 2023 12:42:14 +0800
Subject: [PATCH 206/272] Adjust the parameter error of the existing api
 implementation.

---
 src/libimp/platform/posix/system.h   |  4 ++--
 src/libimp/platform/win/system.h     |  5 +----
 src/libipc/platform/posix/shm_impl.h |  8 +++++---
 src/libipc/platform/win/event_impl.h | 12 ++++++------
 src/libipc/platform/win/mmap_impl.h  | 26 +++++++++++++-------------
 src/libipc/platform/win/shm_impl.h   |  8 ++++----
 6 files changed, 31 insertions(+), 32 deletions(-)

diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index 404077a1..887f28ed 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -38,11 +38,11 @@ result<std::int64_t> conf(info r) noexcept {
   }
   default:
     log.error("invalid info = ", underlyof(r));
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
   auto err = sys::error();
   log.error("info = ", underlyof(r), ", error = ", err);
-  return {false, err};
+  return err;
 }
 
 } // namespace sys
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index 19c20430..c1f01fc7 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -19,7 +19,6 @@
 
 LIBIMP_NAMESPACE_BEG_
 namespace sys {
-namespace {
 
 /**
  * \brief Gets a text description of the system error
@@ -56,8 +55,6 @@ std::string error_string(DWORD code) noexcept {
   return {};
 }
 
-} // namespace
-
 /**
  * \brief Get the system error number.
  * \see https://en.cppreference.com/w/cpp/error/system_category
@@ -82,7 +79,7 @@ result<std::int64_t> conf(info r) noexcept {
   }
   default:
     log.error("invalid info = ", underlyof(r));
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
 }
 
diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
index 661027f9..91b09bb7 100644
--- a/src/libipc/platform/posix/shm_impl.h
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -51,7 +51,7 @@ result<int> shm_open_fd(std::string const &name, mode::type type) noexcept {
   LIBIMP_LOG_();
   if (name.empty()) {
     log.error("name is empty.");
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
 
   /// \brief Open the object for read-write access.
@@ -70,7 +70,7 @@ result<int> shm_open_fd(std::string const &name, mode::type type) noexcept {
     break;
   default:
     log.error("mode type is invalid. type = ", type);
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
 
   /// \brief Create/Open POSIX shared memory bject
@@ -153,7 +153,9 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
 result<void> shm_close(shm_t h) noexcept {
   LIBIMP_LOG_();
   auto shm = valid(h);
-  if (shm == nullptr) return {};
+  if (shm == nullptr) {
+    return std::make_error_code(std::errc::invalid_argument);
+  }
   if (::munmap(shm->memp, shm->f_sz) == posix::failed) {
     auto err = sys::error();
     log.error("failed: munmap(", shm->memp, ", ", shm->f_sz, "). error = ", err);
diff --git a/src/libipc/platform/win/event_impl.h b/src/libipc/platform/win/event_impl.h
index 73ffbc8e..9ca9c441 100644
--- a/src/libipc/platform/win/event_impl.h
+++ b/src/libipc/platform/win/event_impl.h
@@ -49,7 +49,7 @@ result<evt_t> evt_open(std::string name) noexcept {
   if (h == NULL) {
     auto err = sys::error();
     log.error("failed: CreateEvent(FALSE, FALSE, ", name, "). error = ", err);
-    return {nullptr, err};
+    return err;
   }
   return new evt_handle{std::move(name), h};
 }
@@ -99,7 +99,7 @@ result<bool> evt_wait(evt_t evt, std::int64_t ms) noexcept {
   LIBIMP_LOG_();
   if (!is_valid(evt)) {
     log.error("handle is null.");
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
   DWORD dwMilliseconds = (ms < 0) ? INFINITE : static_cast<DWORD>(ms);
   auto r = ::WaitForSingleObject(evt->h_event, dwMilliseconds);
@@ -115,7 +115,7 @@ result<bool> evt_wait(evt_t evt, std::int64_t ms) noexcept {
   }
   auto err = sys::error();
   log.error("failed: WaitForSingleObject(", evt->h_event, ", ", dwMilliseconds, "). error = ", err);
-  return {false, err};
+  return err;
 }
 
 /**
@@ -126,14 +126,14 @@ result<bool> evt_wait(::LIBIMP::span<evt_t const> evts, std::int64_t ms) noexcep
   LIBIMP_LOG_();
   if (evts.empty()) {
     log.error("evts handle is empty.");
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
   // Conversion of the event handle array to the windows handle array.
   std::vector<HANDLE> handles(evts.size());
   for (std::size_t i = 0; i < evts.size(); ++i) {
     if (!is_valid(evts[i])) {
       log.error("handle is null.");
-      return {};
+      return std::make_error_code(std::errc::invalid_argument);
     }
     handles[i] = evts[i]->h_event;
   }
@@ -152,7 +152,7 @@ result<bool> evt_wait(::LIBIMP::span<evt_t const> evts, std::int64_t ms) noexcep
   }
   auto err = sys::error();
   log.error("failed: WaitForMultipleObjects(", handles.size(), ", ", dwMilliseconds, "). error = ", err);
-  return {false, err};
+  return err;
 }
 
 LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index e302a31e..a28ef1b0 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -37,7 +37,7 @@ result<void> mmap_close(HANDLE h) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
   if (!::CloseHandle(h)) {
     auto err = sys::error();
@@ -64,12 +64,12 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
   LIBIMP_LOG_();
   if (file.empty()) {
     log.error("file name is empty.");
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
   auto t_name = detail::to_tstring(file);
   if (t_name.empty()) {
     log.error("file name is empty. (TCHAR conversion failed)");
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
 
   /// \brief Opens a named file mapping object.
@@ -78,7 +78,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     if (h == NULL) {
       auto err = sys::error();
       log.error("failed: OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, ", file, "). error = ", err);
-      return {nullptr, err};
+      return err;
     }
     return h;
   };
@@ -91,7 +91,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     if (h == NULL) {
       auto err = sys::error();
       log.error("failed: CreateFileMapping(PAGE_READWRITE | SEC_COMMIT, ", size, ", ", file, "). error = ", err);
-      return {nullptr, err};
+      return err;
     }
     return h;
   };
@@ -105,7 +105,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     return try_open();
   } else if (!(type & mode::create)) {
     log.error("mode type is invalid. type = ", type);
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
   auto h = try_create();
   if (!h) return h;
@@ -114,7 +114,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
   if ((type == mode::create) && (::GetLastError() == ERROR_ALREADY_EXISTS)) {
     log.info("the file being created already exists. file = ", file, ", type = ", type);
     mmap_close(*h);
-    return {};
+    return sys::error();
   }
   return h;
 }
@@ -127,13 +127,13 @@ result<LPVOID> mmap_memof(HANDLE h) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
   LPVOID mem = ::MapViewOfFile(h, FILE_MAP_ALL_ACCESS, 0, 0, 0);
   if (mem == NULL) {
     auto err = sys::error();
     log.error("failed: MapViewOfFile(", h, ", FILE_MAP_ALL_ACCESS). error = ", err);
-    return {nullptr, err};
+    return err;
   }
   return mem;
 }
@@ -146,13 +146,13 @@ result<SIZE_T> mmap_sizeof(LPCVOID mem) {
   LIBIMP_LOG_();
   if (mem == NULL) {
     log.error("memory pointer is null.");
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
   MEMORY_BASIC_INFORMATION mem_info {};
   if (::VirtualQuery(mem, &mem_info, sizeof(mem_info)) == 0) {
     auto err = sys::error();
     log.error("failed: VirtualQuery(", mem, "). error = ", err);
-    return {false, err};
+    return err;
   }
   return mem_info.RegionSize;
 }
@@ -165,11 +165,11 @@ result<void> mmap_release(HANDLE h, LPCVOID mem) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
   if (mem == NULL) {
     log.error("memory pointer is null.");
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
   if (!::UnmapViewOfFile(mem)) {
     log.warning("failed: UnmapViewOfFile. error = ", sys::error());
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index deec8f38..243df965 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -22,19 +22,19 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   auto h = mmap_open(name, size, type);
   if (*h == NULL) {
     log.error("failed: mmap_open(name = ", name, ", size = ", size, ", type = ", type, ").");
-    return {nullptr, h.error()};
+    return h.error();
   }
   auto mem = mmap_memof(*h);
   if (*mem == NULL) {
     log.error("failed: mmap_memof(", *h, ").");
     mmap_close(*h);
-    return {nullptr, mem.error()};
+    return mem.error();
   }
   auto sz = mmap_sizeof(*mem);
   if (!sz) {
     log.error("failed: mmap_sizeof(", *mem, ").");
     mmap_close(*h);
-    return {nullptr, sz.error()};
+    return sz.error();
   }
   return new shm_handle{std::move(name), *sz, *mem, *h};
 }
@@ -43,7 +43,7 @@ result<void> shm_close(shm_t h) noexcept {
   LIBIMP_LOG_();
   if (h == nullptr) {
     log.error("shm handle is null.");
-    return {};
+    return std::make_error_code(std::errc::invalid_argument);
   }
   auto shm = static_cast<shm_handle *>(h);
   auto ret = mmap_release(shm->h_fmap, shm->memp);

From 2d75c876726a0377df5c3d5ede8a02ba89950ec1 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 9 Sep 2023 13:25:47 +0800
Subject: [PATCH 207/272] Fixed ut error on win.

---
 include/libimp/aligned.h       |  13 +++
 include/libpmr/small_storage.h | 153 ++++++++++++++++++++++++++-------
 test/imp/test_imp_error.cpp    |   4 +-
 test/imp/test_imp_result.cpp   |  12 +--
 4 files changed, 145 insertions(+), 37 deletions(-)

diff --git a/include/libimp/aligned.h b/include/libimp/aligned.h
index 4514b4c2..6dfb4ed1 100644
--- a/include/libimp/aligned.h
+++ b/include/libimp/aligned.h
@@ -59,4 +59,17 @@ class aligned {
   }
 };
 
+/**
+ * \brief Rounds up the given value to the given alignment.
+ * \tparam T The type of the value.
+ * \param value The value to be rounded up.
+ * \param alignment The alignment to be rounded up to.
+ * \return The rounded up value.
+ * \see https://stackoverflow.com/questions/3407012/c-rounding-up-to-the-nearest-multiple-of-a-number
+*/
+template <typename T>
+constexpr T round_up(T value, T alignment) noexcept {
+  return (value + alignment - 1) & ~(alignment - 1);
+}
+
 LIBIMP_NAMESPACE_END_
diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
index 9406a3cb..5ffc3bef 100644
--- a/include/libpmr/small_storage.h
+++ b/include/libpmr/small_storage.h
@@ -17,6 +17,7 @@
 #include "libimp/uninitialized.h"
 #include "libimp/byte.h"
 #include "libimp/generic.h"
+#include "libimp/aligned.h"
 
 #include "libpmr/def.h"
 #include "libpmr/allocator.h"
@@ -80,14 +81,14 @@ class holder;
 template <typename Value>
 class holder<Value, true> : public holder_base {
 
-  alignas(alignof(Value)) std::array<::LIBIMP::byte, sizeof(Value)> value_storage_;
+  ::LIBIMP::aligned<Value> value_storage_;
 
 public:
   holder() = default; // uninitialized
 
   template <typename... A>
   holder(allocator const &, A &&...args) {
-    ::LIBIMP::construct<Value>(value_storage_.data(), std::forward<A>(args)...);
+    ::LIBIMP::construct<Value>(value_storage_.ptr(), std::forward<A>(args)...);
   }
 
   bool valid() const noexcept override {
@@ -111,11 +112,11 @@ class holder<Value, true> : public holder_base {
   }
 
   void *get() noexcept override {
-    return value_storage_.data();
+    return value_storage_.ptr();
   }
 
   void const *get() const noexcept override {
-    return value_storage_.data();
+    return value_storage_.ptr();
   }
 
   void move_to(allocator const &alloc, void *p) noexcept override {
@@ -226,16 +227,19 @@ void *holder_construct(allocator const &alloc, std::size_t n, Construct &&c) {
 class holder_info_ptr {
   allocator const &alloc_;
   holder_info **pptr_;
+  std::size_t size_;
 
 public:
-  holder_info_ptr(allocator const &alloc, holder_info *(&ptr)) noexcept
-    : alloc_(alloc), pptr_(&ptr) {
-    *pptr_ = static_cast<holder_info *>(alloc_.allocate(sizeof(holder_info), alignof(holder_info)));
+  holder_info_ptr(allocator const &alloc, holder_info *(&ptr), std::size_t sz) noexcept
+    : alloc_(alloc)
+    , pptr_ (&ptr)
+    , size_ (::LIBIMP::round_up(sizeof(holder_info), alignof(std::max_align_t)) + sz) {
+    *pptr_ = static_cast<holder_info *>(alloc_.allocate(size_));
   }
 
   ~holder_info_ptr() noexcept {
     if (pptr_ == nullptr) return;
-    alloc_.deallocate(*pptr_, sizeof(holder_info), alignof(holder_info));
+    alloc_.deallocate(*pptr_, size_);
     *pptr_ = nullptr;
   }
 
@@ -356,23 +360,19 @@ template <>
 class holder<void, false> : public holder_base {
 
   detail::holder_info *info_ptr_;
-  void *value_ptr_;
 
 public:
   holder() noexcept
-    : info_ptr_ (nullptr)
-    , value_ptr_(nullptr) {}
+    : info_ptr_ (nullptr){}
 
   /// \brief Constructs a holder with type of `Value`.
   /// alignof(Value) must be less than or equal to alignof(std::max_align_t).
   template <typename Value, 
             std::enable_if_t<alignof(Value) <= alignof(std::max_align_t), bool> = true>
   holder(allocator const &alloc, ::LIBIMP::types<Value>, std::size_t n) : holder() {
-    detail::holder_info_ptr info_p{alloc, info_ptr_};
+    detail::holder_info_ptr info_p{alloc, info_ptr_, sizeof(Value) * n};
     if (!info_p) return;
-    value_ptr_ = detail::holder_construct<Value>(alloc, n, 
-        ::LIBIMP::uninitialized_default_construct_n<Value *, std::size_t>);
-    if (value_ptr_ == nullptr) return;
+    ::LIBIMP::uninitialized_default_construct_n(static_cast<Value *>(get()), n);
     info_p->type = &typeid(Value);
     info_p->sizeof_type = sizeof(Value);
     info_p->count = n;
@@ -380,12 +380,9 @@ class holder<void, false> : public holder_base {
       auto const &src = *static_cast<holder const *>(s);
       auto &      dst = *::LIBIMP::construct<holder>(d);
       if (!src.valid()) return;
-      detail::holder_info_ptr info_p{alloc, dst.info_ptr_};
+      detail::holder_info_ptr info_p{alloc, dst.info_ptr_, sizeof(Value) * src.count()};
       if (!info_p) return;
-      dst.value_ptr_ = detail::holder_construct<Value>(alloc, src.count(), [s = src.get()](Value *d, std::size_t n) {
-        std::uninitialized_copy_n(static_cast<Value const *>(s), n, d);
-      });
-      if (dst.value_ptr_ == nullptr) return;
+      ::LIBIMP::uninitialized_default_construct_n(static_cast<Value *>(dst.get()), src.count());
       *info_p = *src.info_ptr_;
       info_p.release();
     };
@@ -396,7 +393,7 @@ class holder<void, false> : public holder_base {
   }
 
   bool valid() const noexcept override {
-    return (value_ptr_ != nullptr) && (info_ptr_ != nullptr);
+    return info_ptr_ != nullptr;
   }
 
   std::type_info const &type() const noexcept override {
@@ -411,7 +408,8 @@ class holder<void, false> : public holder_base {
 
   std::size_t sizeof_heap() const noexcept override {
     if (!valid()) return 0;
-    return info_ptr_->sizeof_type * info_ptr_->count + sizeof(detail::holder_info);
+    return ::LIBIMP::round_up(sizeof(detail::holder_info), alignof(std::max_align_t))
+         + (info_ptr_->sizeof_type * info_ptr_->count);
   }
 
   std::size_t count() const noexcept override {
@@ -420,18 +418,19 @@ class holder<void, false> : public holder_base {
   }
 
   void *get() noexcept override {
-    return value_ptr_;
+    return reinterpret_cast<void *>(
+        ::LIBIMP::round_up(reinterpret_cast<std::size_t>(info_ptr_ + 1), alignof(std::max_align_t)));
   }
 
   void const *get() const noexcept override {
-    return value_ptr_;
+    return reinterpret_cast<void const *>(
+        ::LIBIMP::round_up(reinterpret_cast<std::size_t>(info_ptr_ + 1), alignof(std::max_align_t)));
   }
 
   void move_to(allocator const &, void *p) noexcept override {
     auto *des = ::LIBIMP::construct<holder>(p);
     if (!valid()) return;
-    std::swap(value_ptr_, des->value_ptr_);
-    std::swap(info_ptr_ , des->info_ptr_);
+    std::swap(info_ptr_, des->info_ptr_);
   }
 
   void copy_to(allocator const &alloc, void *p) const noexcept(false) override {
@@ -442,9 +441,105 @@ class holder<void, false> : public holder_base {
 
   void destroy(allocator const &alloc) noexcept override {
     if (!valid()) return;
-    info_ptr_->dest (value_ptr_, count());
-    alloc.deallocate(value_ptr_, sizeof_heap());
-    alloc.deallocate(info_ptr_ , sizeof(detail::holder_info), alignof(detail::holder_info));
+    info_ptr_->dest(get(), count());
+    alloc.deallocate(info_ptr_, sizeof_heap());
+  }
+};
+
+/**
+ * \class small_storage
+ * \brief Unified SSO (Small Size Optimization).
+ * \tparam N The size of the storage.
+ */
+template <std::size_t N>
+class small_storage {
+
+  static_assert(N > holder<int, false>, "N must be greater than sizeof(holder<int, false>)");
+
+  alignas(std::max_align_t) std::array<::LIBIMP::byte, N> storage_;
+
+public:
+  small_storage(small_storage const &) = delete;
+  small_storage &operator=(small_storage const &) = delete;
+
+  small_storage() noexcept {
+    ::LIBIMP::construct<holder_null>(get_holder());
+  }
+
+  holder_base *get_holder() noexcept {
+    return static_cast<holder_base *>(storage_.data());
+  }
+
+  holder_base const *get_holder() const noexcept {
+    return static_cast<holder_base const *>(storage_.data());
+  }
+
+  bool valid() const noexcept {
+    return get_holder()->valid();
+  }
+
+  std::type_info const &type() const noexcept {
+    return get_holder()->type();
+  }
+
+  std::size_t sizeof_type() const noexcept {
+    return get_holder()->sizeof_type();
+  }
+
+  std::size_t sizeof_heap() const noexcept {
+    return get_holder()->sizeof_heap();
+  }
+
+  std::size_t count() const noexcept {
+    return get_holder()->count();
+  }
+
+  template <typename Value>
+  Value *As() noexcept {
+    return static_cast<Value *>(get_holder()->get());
+  }
+
+  template <typename Value>
+  Value const *As() const noexcept {
+    return static_cast<Value const *>(get_holder()->get());
+  }
+
+  template <typename Value>
+  Value &AsRef() noexcept {
+    return *As<Value>();
+  }
+
+  template <typename Value>
+  Value const &AsRef() const noexcept {
+    return *As<Value>();
+  }
+
+  void move_to(allocator const &alloc, small_storage &des) noexcept {
+    get_holder()->move_to(alloc, des.get_holder());
+  }
+
+  void copy_to(allocator const &alloc, small_storage &des) const noexcept(false) {
+    get_holder()->copy_to(alloc, des.get_holder());
+  }
+
+  void reset(allocator const &alloc) noexcept {
+    if (!valid()) return;
+    get_holder()->destroy(alloc);
+    ::LIBIMP::construct<holder_null>(get_holder());
+  }
+
+  template <typename Value, typename... A>
+  Value *acquire(allocator const &alloc, ::LIBIMP::types<Value>, A &&...args) {
+    get_holder()->destroy(alloc);
+    constexpr bool on_stack = (sizeof(holder<Value, true>) <= N);
+    return ::LIBIMP::construct<holder<Value, on_stack>>(get_holder(), alloc, std::forward<A>(args)...);
+  }
+
+  template <typename Value>
+  Value *acquire(allocator const &alloc, ::LIBIMP::types<Value>, std::size_t n) {
+    get_holder()->destroy(alloc);
+    constexpr bool on_stack = (sizeof(holder<void, true>) <= N);
+    return ::LIBIMP::construct<holder<void, on_stack>>(get_holder(), alloc, ::LIBIMP::types<Value>{}, n);
   }
 };
 
diff --git a/test/imp/test_imp_error.cpp b/test/imp/test_imp_error.cpp
index 8dfb4eff..8f0e31c7 100644
--- a/test/imp/test_imp_error.cpp
+++ b/test/imp/test_imp_error.cpp
@@ -5,10 +5,10 @@
 #include "libimp/error.h"
 #include "libimp/result.h"
 #include "libimp/fmt.h"
+#include "libimp/codecvt.h"
 
 TEST(error, error_code) {
   std::error_code ecode;
   EXPECT_FALSE(ecode);
-  std::cout << ecode.message() << "\n";
-  EXPECT_EQ(ecode.message(), "Success");
+  std::cout << imp::fmt(ecode, '\n');
 }
diff --git a/test/imp/test_imp_result.cpp b/test/imp/test_imp_result.cpp
index efe23b68..3d8ba076 100644
--- a/test/imp/test_imp_result.cpp
+++ b/test/imp/test_imp_result.cpp
@@ -102,11 +102,11 @@ TEST(result, fmt) {
     imp::result<int *> r3 {&aaa};
     EXPECT_EQ(imp::fmt(r3), imp::fmt("succ, value = ", (void *)&aaa));
     imp::result<int *> r4 {nullptr};
-    EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = [-1: Unknown error -1]"));
-    r4 = {nullptr, std::error_code{1234, std::generic_category()}};
-    EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = [1234: Unknown error 1234]"));
+    EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = ", std::error_code(-1, std::generic_category())));
+    r4 = std::error_code(1234, std::generic_category());
+    EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = ", std::error_code(1234, std::generic_category())));
     imp::result<int *> r5;
-    EXPECT_EQ(imp::fmt(r5), "fail, value = null, error = [-1: Unknown error -1]");
+    EXPECT_EQ(imp::fmt(r5), imp::fmt("fail, value = null, error = ", std::error_code(-1, std::generic_category())));
   }
   {
     imp::result<std::int64_t> r1 {-123};
@@ -114,9 +114,9 @@ TEST(result, fmt) {
   }
   {
     imp::result<void> r1;
-    EXPECT_EQ(imp::fmt(r1), "fail, error = [-1: Unknown error -1]");
+    EXPECT_EQ(imp::fmt(r1), imp::fmt("fail, error = ", std::error_code(-1, std::generic_category())));
     r1 = std::error_code{};
     EXPECT_TRUE(r1);
-    EXPECT_EQ(imp::fmt(r1), "succ, error = [0: Success]");
+    EXPECT_EQ(imp::fmt(r1), imp::fmt("succ, error = ", std::error_code()));
   }
 }

From c503812c6fc6da82e33a36c40650762ea6ab0c28 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 9 Sep 2023 13:35:47 +0800
Subject: [PATCH 208/272] [MSVC 19] error C2440: cannot convert to 'void
 (__cdecl *)(void *,std::size_t) noexcept'

---
 include/libimp/result.h        | 2 +-
 include/libpmr/small_storage.h | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/libimp/result.h b/include/libimp/result.h
index c8f90d73..f74f450c 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -42,7 +42,7 @@ struct generic_traits {
 
   /// \brief Custom initialization.
   constexpr static void init_code(storage_t &code) noexcept {
-    code = {0, std::error_code(-1, std::generic_category())};
+    code = {{}, std::error_code(-1, std::generic_category())};
   }
   constexpr static void init_code(storage_t &code, T value, std::error_code const &ec) noexcept {
     code = {value, ec};
diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
index 5ffc3bef..fd08cbad 100644
--- a/include/libpmr/small_storage.h
+++ b/include/libpmr/small_storage.h
@@ -208,7 +208,7 @@ struct holder_info {
   std::size_t sizeof_type;
   std::size_t count;
   void (*copy)(allocator const &, void const *s, void *d);
-  void (*dest)(void *p, std::size_t n) noexcept;
+  void (*dest)(void *p, std::size_t n);
 };
 
 template <typename Value, typename Construct>
@@ -454,7 +454,7 @@ class holder<void, false> : public holder_base {
 template <std::size_t N>
 class small_storage {
 
-  static_assert(N > holder<int, false>, "N must be greater than sizeof(holder<int, false>)");
+  static_assert(N > sizeof(holder<int, false>), "N must be greater than sizeof(holder<int, false>)");
 
   alignas(std::max_align_t) std::array<::LIBIMP::byte, N> storage_;
 

From 6a243514ae4cb01cdb403a880b239492d9b7c5ad Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 9 Sep 2023 16:42:23 +0800
Subject: [PATCH 209/272] Add unit tests for `small_storage`

---
 include/libpmr/small_storage.h      |  6 +++---
 test/pmr/test_pmr_small_storage.cpp | 16 ++++++++++++++++
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
index fd08cbad..bc29f646 100644
--- a/include/libpmr/small_storage.h
+++ b/include/libpmr/small_storage.h
@@ -454,7 +454,7 @@ class holder<void, false> : public holder_base {
 template <std::size_t N>
 class small_storage {
 
-  static_assert(N > sizeof(holder<int, false>), "N must be greater than sizeof(holder<int, false>)");
+  static_assert(N >= sizeof(holder<void *, false>), "N must be greater than sizeof(holder<void *, false>)");
 
   alignas(std::max_align_t) std::array<::LIBIMP::byte, N> storage_;
 
@@ -467,11 +467,11 @@ class small_storage {
   }
 
   holder_base *get_holder() noexcept {
-    return static_cast<holder_base *>(storage_.data());
+    return reinterpret_cast<holder_base *>(storage_.data());
   }
 
   holder_base const *get_holder() const noexcept {
-    return static_cast<holder_base const *>(storage_.data());
+    return reinterpret_cast<holder_base const *>(storage_.data());
   }
 
   bool valid() const noexcept {
diff --git a/test/pmr/test_pmr_small_storage.cpp b/test/pmr/test_pmr_small_storage.cpp
index 6300f641..6e7b547b 100644
--- a/test/pmr/test_pmr_small_storage.cpp
+++ b/test/pmr/test_pmr_small_storage.cpp
@@ -99,5 +99,21 @@ TEST(small_storage, holder_copy_move) {
   h12.destroy(alc);
 }
 
+TEST(small_storage, sizeof) {
+  EXPECT_EQ(sizeof(pmr::holder_null), sizeof(void *));
+  EXPECT_EQ(sizeof(pmr::holder<int, true>), sizeof(void *) + imp::round_up(sizeof(int), alignof(void *)));
+  EXPECT_EQ(sizeof(pmr::holder<int, false>), sizeof(void *) + sizeof(void *));
+  EXPECT_EQ(sizeof(pmr::holder<void, true>), sizeof(void *) + sizeof(void *) + sizeof(pmr::detail::holder_info));
+  EXPECT_EQ(sizeof(pmr::holder<void, false>), sizeof(void *) + sizeof(void *));
+
+  // pmr::small_storage<4> s1;
+  EXPECT_EQ(sizeof(pmr::small_storage<16>)  , 16);
+  EXPECT_EQ(sizeof(pmr::small_storage<64>)  , 64);
+  EXPECT_EQ(sizeof(pmr::small_storage<512>) , 512);
+  EXPECT_EQ(sizeof(pmr::small_storage<4096>), 4096);
+}
+
 TEST(small_storage, construct) {
+  pmr::small_storage<64> ss;
+  SUCCEED();
 }

From 342f3ef27e6c63cb8e41c3a6739d739ea4855209 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 10 Sep 2023 12:05:29 +0800
Subject: [PATCH 210/272] The small_storage is complete.

---
 include/libpmr/small_storage.h      | 160 +++++++++++++++++-----------
 test/pmr/test_pmr_small_storage.cpp |  35 +++++-
 2 files changed, 130 insertions(+), 65 deletions(-)

diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
index bc29f646..b2e3a8aa 100644
--- a/include/libpmr/small_storage.h
+++ b/include/libpmr/small_storage.h
@@ -208,20 +208,29 @@ struct holder_info {
   std::size_t sizeof_type;
   std::size_t count;
   void (*copy)(allocator const &, void const *s, void *d);
+  void (*move)(void *s, void *d);
   void (*dest)(void *p, std::size_t n);
 };
 
-template <typename Value, typename Construct>
-void *holder_construct(allocator const &alloc, std::size_t n, Construct &&c) {
-  void *p = alloc.allocate(n * sizeof(Value));
-  if (p == nullptr) return nullptr;
-  LIBIMP_TRY {
-    std::forward<Construct>(c)(static_cast<Value *>(p), n);
-    return p;
-  } LIBIMP_CATCH(...) {
-    alloc.deallocate(p, n * sizeof(Value));
-    LIBIMP_THROW(, nullptr);
-  }
+template <typename Value>
+std::size_t full_sizeof(std::size_t count) noexcept {
+  return ::LIBIMP::round_up(sizeof(detail::holder_info), alignof(std::max_align_t))
+        + (sizeof(Value) * count);
+}
+
+std::size_t full_sizeof(holder_info const *info) noexcept {
+  return ::LIBIMP::round_up(sizeof(detail::holder_info), alignof(std::max_align_t))
+        + (info->sizeof_type * info->count);
+}
+
+void *value_ptr(holder_info *info) noexcept {
+  return reinterpret_cast<void *>(
+      ::LIBIMP::round_up(reinterpret_cast<std::size_t>(info + 1), alignof(std::max_align_t)));
+}
+
+void const *value_ptr(holder_info const *info) noexcept {
+  return reinterpret_cast<void const *>(
+      ::LIBIMP::round_up(reinterpret_cast<std::size_t>(info + 1), alignof(std::max_align_t)));
 }
 
 class holder_info_ptr {
@@ -270,41 +279,46 @@ template <>
 class holder<void, true> : public holder_base {
 
   detail::holder_info info_;
-  void *value_ptr_;
 
 public:
+  template <typename Value>
+  static std::size_t full_sizeof(std::size_t count) noexcept {
+    return offsetof(holder, info_) + detail::full_sizeof<Value>(count);
+  }
+
   holder() noexcept
-    : info_{&typeid(nullptr)}
-    , value_ptr_(nullptr) {}
+    : info_{&typeid(nullptr)} {}
 
   /// \brief Constructs a holder with type of `Value`.
   /// alignof(Value) must be less than or equal to alignof(std::max_align_t).
   template <typename Value, 
             std::enable_if_t<alignof(Value) <= alignof(std::max_align_t), bool> = true>
-  holder(allocator const &alloc, ::LIBIMP::types<Value>, std::size_t n) : holder() {
-    value_ptr_ = detail::holder_construct<Value>(alloc, n, 
-        ::LIBIMP::uninitialized_default_construct_n<Value *, std::size_t>);
-    if (value_ptr_ == nullptr) return;
+  holder(allocator const &, ::LIBIMP::types<Value>, std::size_t n) : holder() {
+    ::LIBIMP::uninitialized_default_construct_n(static_cast<Value *>(get()), n);
     info_.type = &typeid(Value);
     info_.sizeof_type = sizeof(Value);
     info_.count = n;
-    info_.copy = [](allocator const &alloc, void const *s, void *d) {
+    info_.copy = [](allocator const &, void const *s, void *d) {
       auto const &src = *static_cast<holder const *>(s);
-      auto &      dst = *::LIBIMP::construct<holder>(d);
-      if (!src.valid()) return;
-      dst.value_ptr_ = detail::holder_construct<Value>(alloc, src.count(), [s = src.get()](Value *d, std::size_t n) {
-        std::uninitialized_copy_n(static_cast<Value const *>(s), n, d);
-      });
-      if (dst.value_ptr_ == nullptr) return;
+      auto &      dst = *static_cast<holder *      >(d);
+      std::uninitialized_copy_n(static_cast<Value const *>(src.get()), src.count(), 
+                                static_cast<Value *      >(dst.get()));
       dst.info_ = src.info_;
     };
+    info_.move = [](void *s, void *d) noexcept {
+      auto &src = *static_cast<holder *>(s);
+      auto &dst = *static_cast<holder *>(d);
+      std::uninitialized_move_n(static_cast<Value *>(src.get()), src.count(), 
+                                static_cast<Value *>(dst.get()));
+      std::swap(dst.info_, src.info_);
+    };
     info_.dest = [](void *p, std::size_t n) noexcept {
       ::LIBIMP::destroy_n(static_cast<Value *>(p), n);
     };
   }
 
   bool valid() const noexcept override {
-    return value_ptr_ != nullptr;
+    return (info_.type != nullptr) && (info_.type != &typeid(nullptr));
   }
 
   std::type_info const &type() const noexcept override {
@@ -317,7 +331,7 @@ class holder<void, true> : public holder_base {
   }
 
   std::size_t sizeof_heap() const noexcept override {
-    return info_.sizeof_type * info_.count;
+    return 0;
   }
 
   std::size_t count() const noexcept override {
@@ -325,18 +339,17 @@ class holder<void, true> : public holder_base {
   }
 
   void *get() noexcept override {
-    return value_ptr_;
+    return detail::value_ptr(&info_);
   }
 
   void const *get() const noexcept override {
-    return value_ptr_;
+    return detail::value_ptr(&info_);
   }
 
   void move_to(allocator const &, void *p) noexcept override {
     auto *des = ::LIBIMP::construct<holder>(p);
     if (!valid()) return;
-    std::swap(value_ptr_, des->value_ptr_);
-    std::swap(info_, des->info_);
+    info_.move(this, des);
   }
 
   void copy_to(allocator const &alloc, void *p) const noexcept(false) override {
@@ -345,10 +358,9 @@ class holder<void, true> : public holder_base {
     info_.copy(alloc, this, des);
   }
 
-  void destroy(allocator const &alloc) noexcept override {
+  void destroy(allocator const &) noexcept override {
     if (!valid()) return;
-    info_.dest(value_ptr_, count());
-    alloc.deallocate(value_ptr_, sizeof_heap());
+    info_.dest(get(), count());
   }
 };
 
@@ -363,7 +375,7 @@ class holder<void, false> : public holder_base {
 
 public:
   holder() noexcept
-    : info_ptr_ (nullptr){}
+    : info_ptr_(nullptr) {}
 
   /// \brief Constructs a holder with type of `Value`.
   /// alignof(Value) must be less than or equal to alignof(std::max_align_t).
@@ -378,8 +390,7 @@ class holder<void, false> : public holder_base {
     info_p->count = n;
     info_p->copy = [](allocator const &alloc, void const *s, void *d) {
       auto const &src = *static_cast<holder const *>(s);
-      auto &      dst = *::LIBIMP::construct<holder>(d);
-      if (!src.valid()) return;
+      auto &      dst = *static_cast<holder *      >(d);
       detail::holder_info_ptr info_p{alloc, dst.info_ptr_, sizeof(Value) * src.count()};
       if (!info_p) return;
       ::LIBIMP::uninitialized_default_construct_n(static_cast<Value *>(dst.get()), src.count());
@@ -408,8 +419,7 @@ class holder<void, false> : public holder_base {
 
   std::size_t sizeof_heap() const noexcept override {
     if (!valid()) return 0;
-    return ::LIBIMP::round_up(sizeof(detail::holder_info), alignof(std::max_align_t))
-         + (info_ptr_->sizeof_type * info_ptr_->count);
+    return detail::full_sizeof(info_ptr_);
   }
 
   std::size_t count() const noexcept override {
@@ -418,13 +428,11 @@ class holder<void, false> : public holder_base {
   }
 
   void *get() noexcept override {
-    return reinterpret_cast<void *>(
-        ::LIBIMP::round_up(reinterpret_cast<std::size_t>(info_ptr_ + 1), alignof(std::max_align_t)));
+    return detail::value_ptr(info_ptr_);
   }
 
   void const *get() const noexcept override {
-    return reinterpret_cast<void const *>(
-        ::LIBIMP::round_up(reinterpret_cast<std::size_t>(info_ptr_ + 1), alignof(std::max_align_t)));
+    return detail::value_ptr(info_ptr_);
   }
 
   void move_to(allocator const &, void *p) noexcept override {
@@ -447,8 +455,13 @@ class holder<void, false> : public holder_base {
 };
 
 /**
- * \class small_storage
+ * \class template <std::size_t N> small_storage
  * \brief Unified SSO (Small Size Optimization).
+ * 
+ * \note `small_storage` does not release resources at destructor time, 
+ * the user needs to manually call the `release` function and 
+ * specify the appropriate allocator to complete the resource release.
+ * 
  * \tparam N The size of the storage.
  */
 template <std::size_t N>
@@ -458,6 +471,34 @@ class small_storage {
 
   alignas(std::max_align_t) std::array<::LIBIMP::byte, N> storage_;
 
+  /// \brief Try to construct an object on the stack, and if there is not enough space, 
+  /// the memory allocator allocates heap memory to complete the construction.
+  template <typename T>
+  struct applicant {
+    template <typename... A>
+    T *operator()(small_storage *self, allocator const &alloc, A &&...args) const noexcept(false) {
+      self->get_holder()->destroy(alloc);
+      constexpr bool on_stack = (sizeof(holder<T, true>) <= N);
+      ::LIBIMP::construct<holder<T, on_stack>>(self->get_holder(), alloc, std::forward<A>(args)...);
+      return self->as<T>();
+    }
+  };
+
+  /// \brief Try to construct an array of objects on the stack, and if there is not enough space, 
+  /// the memory allocator allocates heap memory to complete the construction.
+  template <typename T>
+  struct applicant<T[]> {
+    T *operator()(small_storage *self, allocator const &alloc, std::size_t n) const noexcept(false) {
+      self->get_holder()->destroy(alloc);
+      if (holder<void, true>::full_sizeof<T>(n) <= N) {
+        ::LIBIMP::construct<holder<void, true>>(self->get_holder(), alloc, ::LIBIMP::types<T>{}, n);
+      } else {
+        ::LIBIMP::construct<holder<void, false>>(self->get_holder(), alloc, ::LIBIMP::types<T>{}, n);
+      }
+      return self->as<T>();
+    }
+  };
+
 public:
   small_storage(small_storage const &) = delete;
   small_storage &operator=(small_storage const &) = delete;
@@ -495,23 +536,23 @@ class small_storage {
   }
 
   template <typename Value>
-  Value *As() noexcept {
+  Value *as() noexcept {
     return static_cast<Value *>(get_holder()->get());
   }
 
   template <typename Value>
-  Value const *As() const noexcept {
+  Value const *as() const noexcept {
     return static_cast<Value const *>(get_holder()->get());
   }
 
   template <typename Value>
-  Value &AsRef() noexcept {
-    return *As<Value>();
+  Value &as_ref() noexcept {
+    return *as<Value>();
   }
 
   template <typename Value>
-  Value const &AsRef() const noexcept {
-    return *As<Value>();
+  Value const &as_ref() const noexcept {
+    return *as<Value>();
   }
 
   void move_to(allocator const &alloc, small_storage &des) noexcept {
@@ -522,24 +563,15 @@ class small_storage {
     get_holder()->copy_to(alloc, des.get_holder());
   }
 
-  void reset(allocator const &alloc) noexcept {
-    if (!valid()) return;
-    get_holder()->destroy(alloc);
-    ::LIBIMP::construct<holder_null>(get_holder());
-  }
-
   template <typename Value, typename... A>
-  Value *acquire(allocator const &alloc, ::LIBIMP::types<Value>, A &&...args) {
-    get_holder()->destroy(alloc);
-    constexpr bool on_stack = (sizeof(holder<Value, true>) <= N);
-    return ::LIBIMP::construct<holder<Value, on_stack>>(get_holder(), alloc, std::forward<A>(args)...);
+  auto acquire(allocator const &alloc, A &&...args) noexcept(false) {
+    return applicant<Value>{}(this, alloc, std::forward<A>(args)...);
   }
 
-  template <typename Value>
-  Value *acquire(allocator const &alloc, ::LIBIMP::types<Value>, std::size_t n) {
+  void release(allocator const &alloc) noexcept {
+    if (!valid()) return;
     get_holder()->destroy(alloc);
-    constexpr bool on_stack = (sizeof(holder<void, true>) <= N);
-    return ::LIBIMP::construct<holder<void, on_stack>>(get_holder(), alloc, ::LIBIMP::types<Value>{}, n);
+    ::LIBIMP::construct<holder_null>(get_holder());
   }
 };
 
diff --git a/test/pmr/test_pmr_small_storage.cpp b/test/pmr/test_pmr_small_storage.cpp
index 6e7b547b..34c2a448 100644
--- a/test/pmr/test_pmr_small_storage.cpp
+++ b/test/pmr/test_pmr_small_storage.cpp
@@ -103,7 +103,7 @@ TEST(small_storage, sizeof) {
   EXPECT_EQ(sizeof(pmr::holder_null), sizeof(void *));
   EXPECT_EQ(sizeof(pmr::holder<int, true>), sizeof(void *) + imp::round_up(sizeof(int), alignof(void *)));
   EXPECT_EQ(sizeof(pmr::holder<int, false>), sizeof(void *) + sizeof(void *));
-  EXPECT_EQ(sizeof(pmr::holder<void, true>), sizeof(void *) + sizeof(void *) + sizeof(pmr::detail::holder_info));
+  EXPECT_EQ(sizeof(pmr::holder<void, true>), sizeof(void *) + sizeof(pmr::detail::holder_info));
   EXPECT_EQ(sizeof(pmr::holder<void, false>), sizeof(void *) + sizeof(void *));
 
   // pmr::small_storage<4> s1;
@@ -117,3 +117,36 @@ TEST(small_storage, construct) {
   pmr::small_storage<64> ss;
   SUCCEED();
 }
+
+TEST(small_storage, acquire) {
+  pmr::small_storage<128> ss;
+  pmr::allocator alc;
+  ASSERT_FALSE(ss.valid());
+  int *p = ss.acquire<int>(alc, 3);
+  ASSERT_TRUE(ss.valid());
+  ASSERT_NE(p, nullptr);
+  ASSERT_EQ(*p, 3);
+  ASSERT_EQ(p, ss.as<int>());
+  ASSERT_EQ(ss.count(), 1);
+  ASSERT_EQ(ss.sizeof_heap(), 0);
+  ASSERT_EQ(ss.sizeof_type(), sizeof(int));
+
+  p = ss.acquire<int[]>(alc, 3);
+  ASSERT_TRUE(ss.valid());
+  ASSERT_NE(p, nullptr);
+  ASSERT_EQ(p, ss.as<int>());
+  ASSERT_EQ(ss.count(), 3);
+  ASSERT_EQ(ss.sizeof_heap(), 0);
+  ASSERT_EQ(ss.sizeof_type(), sizeof(int));
+
+  p = ss.acquire<int[]>(alc, 30);
+  ASSERT_TRUE(ss.valid());
+  ASSERT_NE(p, nullptr);
+  ASSERT_EQ(p, ss.as<int>());
+  ASSERT_EQ(ss.count(), 30);
+  ASSERT_EQ(ss.sizeof_heap(), sizeof(int) * 30 + sizeof(pmr::detail::holder_info));
+  ASSERT_EQ(ss.sizeof_type(), sizeof(int));
+
+  ss.release(alc);
+  SUCCEED();
+}

From e083ab74268cd373f203b5b1a90f6f77fb7abca3 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 10 Sep 2023 12:10:42 +0800
Subject: [PATCH 211/272] Adjust note.

---
 include/libpmr/allocator.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index 0655a7c2..ea880a82 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -22,10 +22,10 @@ LIBPMR_NAMESPACE_BEG_
  * \brief An allocator which exhibits different allocation behavior 
  * depending upon the memory resource from which it is constructed.
  * 
- * \remarks Unlike std::pmr::polymorphic_allocator, it does not 
+ * \note Unlike `std::pmr::polymorphic_allocator`, it does not 
  * rely on a specific inheritance relationship and only restricts 
  * the interface behavior of the incoming memory resource object to 
- * conform to std::pmr::memory_resource.
+ * conform to `std::pmr::memory_resource`.
  * 
  * \see https://en.cppreference.com/w/cpp/memory/memory_resource
  *      https://en.cppreference.com/w/cpp/memory/polymorphic_allocator
@@ -55,7 +55,7 @@ class LIBIMP_EXPORT allocator {
     holder_mr(MR *p_mr) noexcept
       : res_(p_mr) {}
 
-    // [MSVC 19] error C2259: 'pmr::allocator::holder_mr<void *,bool>': cannot instantiate abstract class.
+    // [MSVC] error C2259: 'pmr::allocator::holder_mr<void *,bool>': cannot instantiate abstract class.
     void *alloc(std::size_t s, std::size_t a) const override { return nullptr; }
     void dealloc(void *p, std::size_t s, std::size_t a) const override {}
   };

From 1f93852fe7e7d74ad5354c6044eecbf6d356e599 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 10 Sep 2023 12:31:09 +0800
Subject: [PATCH 212/272] Fixed segmentation fault in unit test.

---
 include/libpmr/small_storage.h      |  2 +-
 test/pmr/test_pmr_small_storage.cpp | 29 ++++++++++++++++++-----------
 2 files changed, 19 insertions(+), 12 deletions(-)

diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
index b2e3a8aa..317b7a9d 100644
--- a/include/libpmr/small_storage.h
+++ b/include/libpmr/small_storage.h
@@ -283,7 +283,7 @@ class holder<void, true> : public holder_base {
 public:
   template <typename Value>
   static std::size_t full_sizeof(std::size_t count) noexcept {
-    return offsetof(holder, info_) + detail::full_sizeof<Value>(count);
+    return sizeof(holder) - sizeof(info_) + detail::full_sizeof<Value>(count);
   }
 
   holder() noexcept
diff --git a/test/pmr/test_pmr_small_storage.cpp b/test/pmr/test_pmr_small_storage.cpp
index 34c2a448..3fae621a 100644
--- a/test/pmr/test_pmr_small_storage.cpp
+++ b/test/pmr/test_pmr_small_storage.cpp
@@ -74,17 +74,24 @@ TEST(small_storage, holder_copy_move) {
   h5.destroy(alc);
   h6.destroy(alc);
 
-  pmr::holder<void, true> h7(alc, ::LIBIMP::types<int>{}, 10);
-  pmr::holder<void, true> h8, h9;
-  h7.copy_to(alc, &h8);
-  EXPECT_EQ(h7.count(), 10);
-  EXPECT_EQ(h8.count(), 10);
-  h7.move_to(alc, &h9);
-  EXPECT_EQ(h7.count(), 0);
-  EXPECT_EQ(h9.count(), 10);
-  h7.destroy(alc);
-  h8.destroy(alc);
-  h9.destroy(alc);
+  void *ph1 = std::malloc(pmr::holder<void, true>::full_sizeof<int>(10));
+  void *ph2 = std::malloc(pmr::holder<void, true>::full_sizeof<int>(10));
+  void *ph3 = std::malloc(pmr::holder<void, true>::full_sizeof<int>(10));
+  auto *h7 = ::new (ph1) pmr::holder<void, true>(alc, ::LIBIMP::types<int>{}, 10);
+  auto *h8 = ::new (ph2) pmr::holder<void, true>;
+  auto *h9 = ::new (ph2) pmr::holder<void, true>;
+  h7->copy_to(alc, h8);
+  EXPECT_EQ(h7->count(), 10);
+  EXPECT_EQ(h8->count(), 10);
+  h7->move_to(alc, h9);
+  EXPECT_EQ(h7->count(), 0);
+  EXPECT_EQ(h9->count(), 10);
+  h7->destroy(alc);
+  h8->destroy(alc);
+  h9->destroy(alc);
+  std::free(ph1);
+  std::free(ph2);
+  std::free(ph3);
 
   pmr::holder<void, false> h10(alc, ::LIBIMP::types<int>{}, 10);
   pmr::holder<void, false> h11, h12;

From 9bef0a7b18da708888fc231c911617d134babb54 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 16 Sep 2023 14:11:39 +0800
Subject: [PATCH 213/272] Optimization of the storage behavior for
 `small_storage`.

---
 include/libimp/log.h                |   4 +-
 include/libpmr/small_storage.h      | 138 ++++++++++++++++------------
 test/pmr/test_pmr_small_storage.cpp |   8 +-
 3 files changed, 84 insertions(+), 66 deletions(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index bf6c1a18..01c8edc2 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -152,8 +152,8 @@ inline auto make_grip(char const *func, level level_limit = level::info) noexcep
   return make_grip(func, make_std_out(), level_limit);
 }
 
-inline auto make_grip(char const * /*ignore*/, char const *func, level level_limit = level::info) noexcept {
-  return make_grip(func, make_std_out(), level_limit);
+inline auto make_grip(char const * /*ignore*/, char const *name, level level_limit = level::info) noexcept {
+  return make_grip(name, make_std_out(), level_limit);
 }
 
 } // namespace log
diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
index 317b7a9d..6e383f37 100644
--- a/include/libpmr/small_storage.h
+++ b/include/libpmr/small_storage.h
@@ -18,6 +18,7 @@
 #include "libimp/byte.h"
 #include "libimp/generic.h"
 #include "libimp/aligned.h"
+#include "libimp/log.h"
 
 #include "libpmr/def.h"
 #include "libpmr/allocator.h"
@@ -203,13 +204,40 @@ class holder<Value, false> : public holder_base {
 
 namespace detail {
 
+struct holder_type_base {
+  virtual ~holder_type_base() noexcept = default;
+  virtual std::size_t size() const noexcept = 0;
+  virtual std::type_info const &type() const noexcept = 0;
+  virtual void move(void *s, void *d, std::size_t n) const noexcept = 0;
+  virtual void copy(void const *s, void *d, std::size_t n) const noexcept(false) = 0;
+  virtual void dest(void *p, std::size_t n) const noexcept = 0;
+};
+
+template <typename Value>
+struct holder_type : holder_type_base {
+  std::size_t           size() const noexcept override { return sizeof(Value); }
+  std::type_info const &type() const noexcept override { return typeid(Value); }
+
+  void move(void *s, void *d, std::size_t n) const noexcept override {
+    std::uninitialized_move_n(static_cast<Value *>(s), n, static_cast<Value *>(d));
+  }
+  void copy(void const *s, void *d, std::size_t n) const noexcept(false) override {
+    std::uninitialized_copy_n(static_cast<Value const *>(s), n, static_cast<Value *>(d));
+  }
+  void dest(void *p, std::size_t n) const noexcept override {
+    ::LIBIMP::destroy_n(static_cast<Value *>(p), n);
+  }
+};
+
+template <typename Value>
+holder_type_base const *make_holder_type() noexcept {
+  static holder_type<Value> holder_type;
+  return &holder_type;
+}
+
 struct holder_info {
-  std::type_info const *type;
-  std::size_t sizeof_type;
+  holder_type_base const *type;
   std::size_t count;
-  void (*copy)(allocator const &, void const *s, void *d);
-  void (*move)(void *s, void *d);
-  void (*dest)(void *p, std::size_t n);
 };
 
 template <typename Value>
@@ -220,7 +248,7 @@ std::size_t full_sizeof(std::size_t count) noexcept {
 
 std::size_t full_sizeof(holder_info const *info) noexcept {
   return ::LIBIMP::round_up(sizeof(detail::holder_info), alignof(std::max_align_t))
-        + (info->sizeof_type * info->count);
+        + (info->type->size() * info->count);
 }
 
 void *value_ptr(holder_info *info) noexcept {
@@ -260,8 +288,10 @@ class holder_info_ptr {
     return *pptr_;
   }
 
-  holder_info &operator*() noexcept {
-    return **pptr_;
+  holder_info_ptr &operator=(holder_info const &rhs) noexcept {
+    if (!*this) return *this;
+    **pptr_ = rhs;
+    return *this;
   }
 
   void release() noexcept {
@@ -286,8 +316,7 @@ class holder<void, true> : public holder_base {
     return sizeof(holder) - sizeof(info_) + detail::full_sizeof<Value>(count);
   }
 
-  holder() noexcept
-    : info_{&typeid(nullptr)} {}
+  holder() noexcept : info_{} {}
 
   /// \brief Constructs a holder with type of `Value`.
   /// alignof(Value) must be less than or equal to alignof(std::max_align_t).
@@ -295,39 +324,22 @@ class holder<void, true> : public holder_base {
             std::enable_if_t<alignof(Value) <= alignof(std::max_align_t), bool> = true>
   holder(allocator const &, ::LIBIMP::types<Value>, std::size_t n) : holder() {
     ::LIBIMP::uninitialized_default_construct_n(static_cast<Value *>(get()), n);
-    info_.type = &typeid(Value);
-    info_.sizeof_type = sizeof(Value);
+    info_.type  = detail::make_holder_type<Value>();
     info_.count = n;
-    info_.copy = [](allocator const &, void const *s, void *d) {
-      auto const &src = *static_cast<holder const *>(s);
-      auto &      dst = *static_cast<holder *      >(d);
-      std::uninitialized_copy_n(static_cast<Value const *>(src.get()), src.count(), 
-                                static_cast<Value *      >(dst.get()));
-      dst.info_ = src.info_;
-    };
-    info_.move = [](void *s, void *d) noexcept {
-      auto &src = *static_cast<holder *>(s);
-      auto &dst = *static_cast<holder *>(d);
-      std::uninitialized_move_n(static_cast<Value *>(src.get()), src.count(), 
-                                static_cast<Value *>(dst.get()));
-      std::swap(dst.info_, src.info_);
-    };
-    info_.dest = [](void *p, std::size_t n) noexcept {
-      ::LIBIMP::destroy_n(static_cast<Value *>(p), n);
-    };
   }
 
   bool valid() const noexcept override {
-    return (info_.type != nullptr) && (info_.type != &typeid(nullptr));
+    return info_.type != nullptr;
   }
 
   std::type_info const &type() const noexcept override {
     if (!valid()) return typeid(nullptr);
-    return *info_.type;
+    return info_.type->type();
   }
 
   std::size_t sizeof_type() const noexcept override {
-    return info_.sizeof_type;
+    if (!valid()) return 0;
+    return info_.type->size();
   }
 
   std::size_t sizeof_heap() const noexcept override {
@@ -349,18 +361,20 @@ class holder<void, true> : public holder_base {
   void move_to(allocator const &, void *p) noexcept override {
     auto *des = ::LIBIMP::construct<holder>(p);
     if (!valid()) return;
-    info_.move(this, des);
+    info_.type->move(this->get(), des->get(), this->count());
+    std::swap(des->info_, this->info_);
   }
 
   void copy_to(allocator const &alloc, void *p) const noexcept(false) override {
     auto *des = ::LIBIMP::construct<holder>(p);
     if (!valid()) return;
-    info_.copy(alloc, this, des);
+    info_.type->copy(this->get(), des->get(), this->count());
+    des->info_ = this->info_;
   }
 
   void destroy(allocator const &) noexcept override {
     if (!valid()) return;
-    info_.dest(get(), count());
+    info_.type->dest(get(), count());
   }
 };
 
@@ -382,39 +396,32 @@ class holder<void, false> : public holder_base {
   template <typename Value, 
             std::enable_if_t<alignof(Value) <= alignof(std::max_align_t), bool> = true>
   holder(allocator const &alloc, ::LIBIMP::types<Value>, std::size_t n) : holder() {
+    LIBIMP_LOG_("holder<void, false>");
     detail::holder_info_ptr info_p{alloc, info_ptr_, sizeof(Value) * n};
-    if (!info_p) return;
+    if (!info_p) {
+      log.error("The destination information-pointer failed to be constructed."
+                " type size = ", sizeof(Value),
+                ", count = "   , n);
+      return;
+    }
     ::LIBIMP::uninitialized_default_construct_n(static_cast<Value *>(get()), n);
-    info_p->type = &typeid(Value);
-    info_p->sizeof_type = sizeof(Value);
+    info_p->type  = detail::make_holder_type<Value>();
     info_p->count = n;
-    info_p->copy = [](allocator const &alloc, void const *s, void *d) {
-      auto const &src = *static_cast<holder const *>(s);
-      auto &      dst = *static_cast<holder *      >(d);
-      detail::holder_info_ptr info_p{alloc, dst.info_ptr_, sizeof(Value) * src.count()};
-      if (!info_p) return;
-      ::LIBIMP::uninitialized_default_construct_n(static_cast<Value *>(dst.get()), src.count());
-      *info_p = *src.info_ptr_;
-      info_p.release();
-    };
-    info_p->dest = [](void *p, std::size_t n) noexcept {
-      ::LIBIMP::destroy_n(static_cast<Value *>(p), n);
-    };
     info_p.release();
   }
 
   bool valid() const noexcept override {
-    return info_ptr_ != nullptr;
+    return (info_ptr_ != nullptr) && (info_ptr_->type != nullptr);
   }
 
   std::type_info const &type() const noexcept override {
     if (!valid()) return typeid(nullptr);
-    return *info_ptr_->type;
+    return info_ptr_->type->type();
   }
 
   std::size_t sizeof_type() const noexcept override {
     if (!valid()) return 0;
-    return info_ptr_->sizeof_type;
+    return info_ptr_->type->size();
   }
 
   std::size_t sizeof_heap() const noexcept override {
@@ -442,14 +449,24 @@ class holder<void, false> : public holder_base {
   }
 
   void copy_to(allocator const &alloc, void *p) const noexcept(false) override {
+    LIBIMP_LOG_();
     auto *des = ::LIBIMP::construct<holder>(p);
     if (!valid()) return;
-    info_ptr_->copy(alloc, this, des);
+    detail::holder_info_ptr info_p{alloc, des->info_ptr_, this->sizeof_type() * this->count()};
+    if (!info_p) {
+      log.error("The destination information-pointer failed to be constructed."
+                " type size = ", this->sizeof_type(),
+                ", count = "   , this->count());
+      return;
+    }
+    info_ptr_->type->copy(this->get(), des->get(), this->count());
+    info_p = *info_ptr_;
+    info_p.release();
   }
 
   void destroy(allocator const &alloc) noexcept override {
     if (!valid()) return;
-    info_ptr_->dest(get(), count());
+    info_ptr_->type->dest(get(), count());
     alloc.deallocate(info_ptr_, sizeof_heap());
   }
 };
@@ -467,9 +484,10 @@ class holder<void, false> : public holder_base {
 template <std::size_t N>
 class small_storage {
 
-  static_assert(N >= sizeof(holder<void *, false>), "N must be greater than sizeof(holder<void *, false>)");
+  constexpr static std::size_t storage_size = sizeof(holder<void *, false>) - sizeof(void *) + N;
+  static_assert(storage_size >= sizeof(holder<void *, false>), "N is not large enough to hold a pointer.");
 
-  alignas(std::max_align_t) std::array<::LIBIMP::byte, N> storage_;
+  alignas(std::max_align_t) std::array<::LIBIMP::byte, storage_size> storage_;
 
   /// \brief Try to construct an object on the stack, and if there is not enough space, 
   /// the memory allocator allocates heap memory to complete the construction.
@@ -478,7 +496,7 @@ class small_storage {
     template <typename... A>
     T *operator()(small_storage *self, allocator const &alloc, A &&...args) const noexcept(false) {
       self->get_holder()->destroy(alloc);
-      constexpr bool on_stack = (sizeof(holder<T, true>) <= N);
+      constexpr bool on_stack = (sizeof(holder<T, true>) <= storage_size);
       ::LIBIMP::construct<holder<T, on_stack>>(self->get_holder(), alloc, std::forward<A>(args)...);
       return self->as<T>();
     }
@@ -490,8 +508,8 @@ class small_storage {
   struct applicant<T[]> {
     T *operator()(small_storage *self, allocator const &alloc, std::size_t n) const noexcept(false) {
       self->get_holder()->destroy(alloc);
-      if (holder<void, true>::full_sizeof<T>(n) <= N) {
-        ::LIBIMP::construct<holder<void, true>>(self->get_holder(), alloc, ::LIBIMP::types<T>{}, n);
+      if (holder<void, true>::full_sizeof<T>(n) <= storage_size) {
+        ::LIBIMP::construct<holder<void, true> >(self->get_holder(), alloc, ::LIBIMP::types<T>{}, n);
       } else {
         ::LIBIMP::construct<holder<void, false>>(self->get_holder(), alloc, ::LIBIMP::types<T>{}, n);
       }
diff --git a/test/pmr/test_pmr_small_storage.cpp b/test/pmr/test_pmr_small_storage.cpp
index 3fae621a..88914ab8 100644
--- a/test/pmr/test_pmr_small_storage.cpp
+++ b/test/pmr/test_pmr_small_storage.cpp
@@ -114,10 +114,10 @@ TEST(small_storage, sizeof) {
   EXPECT_EQ(sizeof(pmr::holder<void, false>), sizeof(void *) + sizeof(void *));
 
   // pmr::small_storage<4> s1;
-  EXPECT_EQ(sizeof(pmr::small_storage<16>)  , 16);
-  EXPECT_EQ(sizeof(pmr::small_storage<64>)  , 64);
-  EXPECT_EQ(sizeof(pmr::small_storage<512>) , 512);
-  EXPECT_EQ(sizeof(pmr::small_storage<4096>), 4096);
+  EXPECT_TRUE(sizeof(pmr::small_storage<16>)   > 16);
+  EXPECT_TRUE(sizeof(pmr::small_storage<64>)   > 64);
+  EXPECT_TRUE(sizeof(pmr::small_storage<512>)  > 512);
+  EXPECT_TRUE(sizeof(pmr::small_storage<4096>) > 4096);
 }
 
 TEST(small_storage, construct) {

From 1c76f926872332f4de035c69000a04371eb76b16 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 16 Sep 2023 14:29:30 +0800
Subject: [PATCH 214/272] [MSVC] error C2039: "uninitialized_move_n"

---
 include/libimp/detect_plat.h   | 14 +++++++-------
 include/libimp/uninitialized.h | 26 +++++++++++++++++++++++++-
 include/libpmr/small_storage.h |  2 +-
 3 files changed, 33 insertions(+), 9 deletions(-)

diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
index 1206d062..a38dac2a 100644
--- a/include/libimp/detect_plat.h
+++ b/include/libimp/detect_plat.h
@@ -208,11 +208,11 @@
 ///      https://stackoverflow.com/questions/6487013/programmatically-determine-whether-exceptions-are-enabled
 #if defined(__cpp_exceptions) && __cpp_exceptions || \
     defined(__EXCEPTIONS) || defined(_CPPUNWIND)
-# define LIBIMP_TRY                     try
-# define LIBIMP_CATCH(...)              catch (__VA_ARGS__)
-# define LIBIMP_THROW($exception, $ret) throw $exception
+# define LIBIMP_TRY                    try
+# define LIBIMP_CATCH(...)             catch (__VA_ARGS__)
+# define LIBIMP_THROW($exception, ...) throw $exception
 #else
-# define LIBIMP_TRY                     if (true)
-# define LIBIMP_CATCH(...)              else if (false)
-# define LIBIMP_THROW($exception, $ret) return $ret
-#endif
\ No newline at end of file
+# define LIBIMP_TRY                    if (true)
+# define LIBIMP_CATCH(...)             else if (false)
+# define LIBIMP_THROW($exception, ...) return __VA_ARGS__
+#endif
diff --git a/include/libimp/uninitialized.h b/include/libimp/uninitialized.h
index 7837bf93..b3525003 100644
--- a/include/libimp/uninitialized.h
+++ b/include/libimp/uninitialized.h
@@ -100,7 +100,7 @@ ForwardIt destroy_n(ForwardIt first, Size n) noexcept {
 
 /**
  * \brief Constructs objects by default-initialization 
- * in an uninitialized area of memory, defined by a start and a count.
+ *        in an uninitialized area of memory, defined by a start and a count.
  * \see https://en.cppreference.com/w/cpp/memory/uninitialized_default_construct_n
 */
 template <typename ForwardIt, typename Size>
@@ -121,4 +121,28 @@ ForwardIt uninitialized_default_construct_n(ForwardIt first, Size n) {
 #endif
 }
 
+/**
+* \brief Moves a number of objects to an uninitialized area of memory.
+* \see https://en.cppreference.com/w/cpp/memory/uninitialized_move_n
+*/
+template <typename InputIt, typename Size, typename NoThrowForwardIt>
+auto uninitialized_move_n(InputIt first, Size count, NoThrowForwardIt d_first)
+  -> std::pair<InputIt, NoThrowForwardIt> {
+#if defined(LIBIMP_CPP_17)
+  return std::uninitialized_move_n(first, count, d_first);
+#else
+  using Value = typename std::iterator_traits<NoThrowForwardIt>::value_type;
+  NoThrowForwardIt current = d_first;
+  LIBIMP_TRY {
+    for (; count > 0; ++first, (void) ++current, --count) {
+      ::new (static_cast<void *>(std::addressof(*current))) Value(std::move(*first));
+    }
+  } LIBIMP_CATCH(...) {
+    destroy(d_first, current);
+    LIBIMP_THROW(, {first, d_first});
+  }
+  return {first, current};
+#endif
+}
+
 LIBIMP_NAMESPACE_END_
diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
index 6e383f37..faff4590 100644
--- a/include/libpmr/small_storage.h
+++ b/include/libpmr/small_storage.h
@@ -219,7 +219,7 @@ struct holder_type : holder_type_base {
   std::type_info const &type() const noexcept override { return typeid(Value); }
 
   void move(void *s, void *d, std::size_t n) const noexcept override {
-    std::uninitialized_move_n(static_cast<Value *>(s), n, static_cast<Value *>(d));
+    ::LIBIMP::uninitialized_move_n(static_cast<Value *>(s), n, static_cast<Value *>(d));
   }
   void copy(void const *s, void *d, std::size_t n) const noexcept(false) override {
     std::uninitialized_copy_n(static_cast<Value const *>(s), n, static_cast<Value *>(d));

From 891e161e82b9603bbc71dc37aa8fde60b5cdda9d Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 16 Sep 2023 20:35:54 +0800
Subject: [PATCH 215/272] Prepare for  `monotonic_buffer_resource`
 implementation.

---
 include/libimp/byte.h                      |  4 +-
 include/libpmr/allocator.h                 | 14 +++---
 include/libpmr/memory_resource.h           |  4 +-
 include/libpmr/monotonic_buffer_resource.h | 48 ++++++++++++++++++++
 src/libpmr/monotonic_buffer_resource.cpp   | 52 ++++++++++++++++++++++
 5 files changed, 112 insertions(+), 10 deletions(-)
 create mode 100644 include/libpmr/monotonic_buffer_resource.h
 create mode 100644 src/libpmr/monotonic_buffer_resource.cpp

diff --git a/include/libimp/byte.h b/include/libimp/byte.h
index 982d1730..eb4400f6 100644
--- a/include/libimp/byte.h
+++ b/include/libimp/byte.h
@@ -56,12 +56,12 @@ class byte {
 #endif // LIBIMP_CPP_LIB_BYTE_
 
   template <typename T, typename = detail::is_integral<T>>
-  explicit constexpr operator T() const noexcept {
+  constexpr operator T() const noexcept {
     return static_cast<T>(bits_);
   }
 
 #ifdef LIBIMP_CPP_LIB_BYTE_
-  explicit constexpr operator std::byte() const noexcept {
+  constexpr operator std::byte() const noexcept {
     /// \brief C++17 relaxed enum class initialization rules.
     /// \see https://en.cppreference.com/w/cpp/language/enum#enum_relaxed_init_cpp17
     return std::byte{bits_};
diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index ea880a82..c02c8d7f 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -20,12 +20,12 @@ LIBPMR_NAMESPACE_BEG_
 
 /**
  * \brief An allocator which exhibits different allocation behavior 
- * depending upon the memory resource from which it is constructed.
+ *        depending upon the memory resource from which it is constructed.
  * 
  * \note Unlike `std::pmr::polymorphic_allocator`, it does not 
- * rely on a specific inheritance relationship and only restricts 
- * the interface behavior of the incoming memory resource object to 
- * conform to `std::pmr::memory_resource`.
+ *       rely on a specific inheritance relationship and only restricts 
+ *       the interface behavior of the incoming memory resource object to 
+ *       conform to `std::pmr::memory_resource`.
  * 
  * \see https://en.cppreference.com/w/cpp/memory/memory_resource
  *      https://en.cppreference.com/w/cpp/memory/polymorphic_allocator
@@ -88,6 +88,8 @@ class LIBIMP_EXPORT allocator {
   holder_mr_base const &get_holder() const noexcept;
 
 public:
+  /// \brief Constructs an `allocator` using the return value of 
+  ///       `new_delete_resource::get()` as the underlying memory resource.
   allocator() noexcept;
   ~allocator() noexcept;
 
@@ -97,8 +99,8 @@ class LIBIMP_EXPORT allocator {
   allocator(allocator &&other) noexcept = default;
   allocator &operator=(allocator &&other) & noexcept = default;
 
-  /// \brief Constructs a allocator from a memory resource pointer
-  /// The lifetime of the pointer must be longer than that of allocator.
+  /// \brief Constructs a allocator from a memory resource pointer.
+  /// \note The lifetime of the pointer must be longer than that of allocator.
   template <typename T, verify_memory_resource<T> = true>
   allocator(T *p_mr) noexcept {
     if (p_mr == nullptr) {
diff --git a/include/libpmr/memory_resource.h b/include/libpmr/memory_resource.h
index 523f6c2d..8ec6c9e6 100644
--- a/include/libpmr/memory_resource.h
+++ b/include/libpmr/memory_resource.h
@@ -40,9 +40,9 @@ using verify_memory_resource =
                    has_deallocate<T>::value, bool>;
 
 /**
+ * \class LIBIMP_EXPORT new_delete_resource
  * \brief A memory resource that uses the 
- * standard memory allocation and deallocation interface to allocate memory.
- * 
+ *        standard memory allocation and deallocation interface to allocate memory.
  * \see https://en.cppreference.com/w/cpp/memory/new_delete_resource
  */
 class LIBIMP_EXPORT new_delete_resource {
diff --git a/include/libpmr/monotonic_buffer_resource.h b/include/libpmr/monotonic_buffer_resource.h
new file mode 100644
index 00000000..0fa2df94
--- /dev/null
+++ b/include/libpmr/monotonic_buffer_resource.h
@@ -0,0 +1,48 @@
+/**
+ * \file libpmr/monotonic_buffer_resource.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief A special-purpose the `allocator` that releases the allocated memory only when the resource is destroyed.
+ * \date 2023-09-16
+ */
+#pragma once
+
+#include <cstddef>  // std::size_t, std::max_align_t
+
+#include "libimp/export.h"
+#include "libimp/span.h"
+#include "libimp/byte.h"
+
+#include "libpmr/def.h"
+#include "libpmr/allocator.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/**
+ * \class LIBIMP_EXPORT monotonic_buffer_resource
+ * \brief A special-purpose memory resource class 
+ *        that releases the allocated memory only when the resource is destroyed.
+ * \see https://en.cppreference.com/w/cpp/memory/monotonic_buffer_resource
+ */
+class LIBIMP_EXPORT monotonic_buffer_resource {
+
+public:
+  monotonic_buffer_resource() noexcept;
+  explicit monotonic_buffer_resource(allocator upstream);
+  explicit monotonic_buffer_resource(std::size_t initial_size);
+  monotonic_buffer_resource(std::size_t initial_size, allocator upstream);
+  monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer) noexcept;
+  monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer, allocator upstream) noexcept;
+
+  ~monotonic_buffer_resource();
+
+  monotonic_buffer_resource(monotonic_buffer_resource const &) = delete;
+  monotonic_buffer_resource &operator=(monotonic_buffer_resource const &) = delete;
+
+  allocator upstream_resource() const noexcept;
+  void release();
+
+  void *allocate(std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
+  void deallocate(void *p, std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
+};
+
+LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/monotonic_buffer_resource.cpp b/src/libpmr/monotonic_buffer_resource.cpp
new file mode 100644
index 00000000..16bbebab
--- /dev/null
+++ b/src/libpmr/monotonic_buffer_resource.cpp
@@ -0,0 +1,52 @@
+
+#include "libimp/log.h"
+
+#include "libpmr/monotonic_buffer_resource.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+monotonic_buffer_resource::monotonic_buffer_resource() noexcept {
+
+}
+
+monotonic_buffer_resource::monotonic_buffer_resource(allocator upstream) {
+
+}
+
+monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size) {
+
+}
+
+monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size, allocator upstream) {
+
+}
+
+monotonic_buffer_resource::monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer) noexcept {
+
+}
+
+monotonic_buffer_resource::monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer, allocator upstream) noexcept {
+
+}
+
+monotonic_buffer_resource::~monotonic_buffer_resource() {
+
+}
+
+allocator monotonic_buffer_resource::upstream_resource() const noexcept {
+
+}
+
+void monotonic_buffer_resource::release() {
+
+}
+
+void *monotonic_buffer_resource::allocate(std::size_t bytes, std::size_t alignment) noexcept {
+
+}
+
+void monotonic_buffer_resource::deallocate(void *p, std::size_t bytes, std::size_t alignment) noexcept {
+
+}
+
+LIBPMR_NAMESPACE_END_

From 47b8f605f5c23f1dc4cf2eab6839052427d6c2aa Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 17 Sep 2023 13:44:41 +0800
Subject: [PATCH 216/272] add: [pmr] implementation for
 `monotonic_buffer_resource`

---
 include/libpmr/monotonic_buffer_resource.h    | 15 ++-
 src/libpmr/monotonic_buffer_resource.cpp      | 97 +++++++++++++++----
 .../test_pmr_monotonic_buffer_resource.cpp    | 15 +++
 3 files changed, 105 insertions(+), 22 deletions(-)
 create mode 100644 test/pmr/test_pmr_monotonic_buffer_resource.cpp

diff --git a/include/libpmr/monotonic_buffer_resource.h b/include/libpmr/monotonic_buffer_resource.h
index 0fa2df94..fb8079b7 100644
--- a/include/libpmr/monotonic_buffer_resource.h
+++ b/include/libpmr/monotonic_buffer_resource.h
@@ -25,9 +25,22 @@ LIBPMR_NAMESPACE_BEG_
  */
 class LIBIMP_EXPORT monotonic_buffer_resource {
 
+  allocator upstream_;
+
+  struct node {
+    node *next;
+    std::size_t size;
+  } *free_list_;
+
+  ::LIBIMP::byte *head_;
+  ::LIBIMP::byte *tail_;
+
+  ::LIBIMP::span<::LIBIMP::byte> const initial_buffer_;
+  std::size_t initial_size_;
+
 public:
   monotonic_buffer_resource() noexcept;
-  explicit monotonic_buffer_resource(allocator upstream);
+  explicit monotonic_buffer_resource(allocator upstream) noexcept;
   explicit monotonic_buffer_resource(std::size_t initial_size);
   monotonic_buffer_resource(std::size_t initial_size, allocator upstream);
   monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer) noexcept;
diff --git a/src/libpmr/monotonic_buffer_resource.cpp b/src/libpmr/monotonic_buffer_resource.cpp
index 16bbebab..9d30f3ac 100644
--- a/src/libpmr/monotonic_buffer_resource.cpp
+++ b/src/libpmr/monotonic_buffer_resource.cpp
@@ -1,52 +1,107 @@
 
+#include <utility>
+
 #include "libimp/log.h"
+#include "libimp/aligned.h"
 
 #include "libpmr/monotonic_buffer_resource.h"
 
 LIBPMR_NAMESPACE_BEG_
-
-monotonic_buffer_resource::monotonic_buffer_resource() noexcept {
-
-}
-
-monotonic_buffer_resource::monotonic_buffer_resource(allocator upstream) {
-
+namespace {
+
+template <typename Node>
+Node *make_node(allocator const &upstream, std::size_t initial_size, std::size_t alignment) {
+  LIBIMP_LOG_();
+  auto sz = ::LIBIMP::round_up(sizeof(Node), alignment) + initial_size;
+  auto *node = static_cast<Node *>(upstream.allocate(sz));
+  if (node == nullptr) {
+    log.error("failed: allocate memory for `monotonic_buffer_resource`.");
+    return nullptr;
+  }
+  node->next = nullptr;
+  node->size = sz;
+  return node;
 }
 
-monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size) {
-
-}
+} // namespace
 
-monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size, allocator upstream) {
+monotonic_buffer_resource::monotonic_buffer_resource() noexcept
+  : monotonic_buffer_resource(allocator{}) {}
 
-}
+monotonic_buffer_resource::monotonic_buffer_resource(allocator upstream) noexcept
+  : upstream_ (std::move(upstream))
+  , free_list_(nullptr)
+  , head_     (nullptr)
+  , tail_     (nullptr)
+  , initial_size_(0) {}
 
-monotonic_buffer_resource::monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer) noexcept {
+monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size)
+  : monotonic_buffer_resource(initial_size, allocator{}) {}
 
-}
+monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size, allocator upstream)
+  : upstream_ (std::move(upstream))
+  , free_list_(make_node<node>(upstream_, initial_size, alignof(std::max_align_t)))
+  , head_     (free_list_ == nullptr ? reinterpret_cast<::LIBIMP::byte *>(free_list_) + sizeof(node) : nullptr)
+  , tail_     (head_ + initial_size)
+  , initial_size_(initial_size) {}
 
-monotonic_buffer_resource::monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer, allocator upstream) noexcept {
+monotonic_buffer_resource::monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer) noexcept
+  : monotonic_buffer_resource(buffer, allocator{}) {}
 
-}
+monotonic_buffer_resource::monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer, allocator upstream) noexcept
+  : upstream_ (std::move(upstream))
+  , free_list_(nullptr)
+  , head_     (buffer.begin())
+  , tail_     (buffer.end())
+  , initial_buffer_(buffer)
+  , initial_size_(initial_buffer_.size()) {}
 
 monotonic_buffer_resource::~monotonic_buffer_resource() {
-
+  release();
 }
 
 allocator monotonic_buffer_resource::upstream_resource() const noexcept {
-
+  return upstream_;
 }
 
 void monotonic_buffer_resource::release() {
-
+  while (free_list_ != nullptr) {
+    auto *next = free_list_->next;
+    upstream_.deallocate(free_list_, free_list_->size);
+    free_list_ = next;
+  }
+  head_ = initial_buffer_.begin();
+  tail_ = initial_buffer_.end();
 }
 
 void *monotonic_buffer_resource::allocate(std::size_t bytes, std::size_t alignment) noexcept {
-
+  LIBIMP_LOG_();
+  if (bytes == 0) {
+    log.error("failed: allocate bytes = 0.");
+    return nullptr;
+  }
+  if ((alignment & (alignment - 1)) != 0) {
+    log.error("failed: allocate alignment is not power of 2.");
+    return nullptr;
+  }
+  auto *p = reinterpret_cast<::LIBIMP::byte *>(::LIBIMP::round_up(reinterpret_cast<std::size_t>(head_), alignment));
+  auto remain = static_cast<std::size_t>(tail_ - p);
+  if (remain < bytes) {
+    initial_size_ = (std::max)(initial_size_ * 2, bytes);
+    auto *node = make_node<monotonic_buffer_resource::node>(upstream_, initial_size_, alignment);
+    if (node == nullptr) return nullptr;
+    node->next = free_list_;
+    free_list_ = node;
+    p = reinterpret_cast<::LIBIMP::byte *>(free_list_) + ::LIBIMP::round_up(sizeof(node), alignment);
+  }
+  return p;
 }
 
 void monotonic_buffer_resource::deallocate(void *p, std::size_t bytes, std::size_t alignment) noexcept {
-
+  static_cast<void>(p);
+  static_cast<void>(bytes);
+  static_cast<void>(alignment);
+  // Do nothing.
 }
 
 LIBPMR_NAMESPACE_END_
diff --git a/test/pmr/test_pmr_monotonic_buffer_resource.cpp b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
new file mode 100644
index 00000000..1774519d
--- /dev/null
+++ b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
@@ -0,0 +1,15 @@
+
+#include "gtest/gtest.h"
+
+#include "libpmr/monotonic_buffer_resource.h"
+
+TEST(monotonic_buffer_resource, construct) {
+  { pmr::monotonic_buffer_resource tmp; }
+  pmr::monotonic_buffer_resource{};
+  pmr::monotonic_buffer_resource{pmr::allocator{}};
+  pmr::monotonic_buffer_resource{0};
+  pmr::monotonic_buffer_resource{0, pmr::allocator{}};
+  pmr::monotonic_buffer_resource{imp::span<imp::byte>{}};
+  pmr::monotonic_buffer_resource{imp::span<imp::byte>{}, pmr::allocator{}};
+  SUCCEED();
+}

From 665a347447734252a090c8ea479f377122f0c068 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 17 Sep 2023 14:44:48 +0800
Subject: [PATCH 217/272] fix some bugs

---
 include/libpmr/monotonic_buffer_resource.h |  5 +-
 src/libpmr/monotonic_buffer_resource.cpp   | 61 +++++++++++++---------
 2 files changed, 40 insertions(+), 26 deletions(-)

diff --git a/include/libpmr/monotonic_buffer_resource.h b/include/libpmr/monotonic_buffer_resource.h
index fb8079b7..6b0d4dfd 100644
--- a/include/libpmr/monotonic_buffer_resource.h
+++ b/include/libpmr/monotonic_buffer_resource.h
@@ -34,9 +34,10 @@ class LIBIMP_EXPORT monotonic_buffer_resource {
 
   ::LIBIMP::byte *head_;
   ::LIBIMP::byte *tail_;
+  std::size_t next_size_;
 
-  ::LIBIMP::span<::LIBIMP::byte> const initial_buffer_;
-  std::size_t initial_size_;
+  ::LIBIMP::byte * const initial_buffer_;
+  std::size_t const initial_size_;
 
 public:
   monotonic_buffer_resource() noexcept;
diff --git a/src/libpmr/monotonic_buffer_resource.cpp b/src/libpmr/monotonic_buffer_resource.cpp
index 9d30f3ac..195aa862 100644
--- a/src/libpmr/monotonic_buffer_resource.cpp
+++ b/src/libpmr/monotonic_buffer_resource.cpp
@@ -1,5 +1,7 @@
 
 #include <utility>
+#include <memory>
+#include <algorithm>
 
 #include "libimp/log.h"
 #include "libimp/aligned.h"
@@ -23,38 +25,41 @@ Node *make_node(allocator const &upstream, std::size_t initial_size, std::size_t
   return node;
 }
 
+std::size_t next_buffer_size(std::size_t size) noexcept {
+  return size * 3 / 2;
+}
+
 } // namespace
 
 monotonic_buffer_resource::monotonic_buffer_resource() noexcept
   : monotonic_buffer_resource(allocator{}) {}
 
 monotonic_buffer_resource::monotonic_buffer_resource(allocator upstream) noexcept
-  : upstream_ (std::move(upstream))
-  , free_list_(nullptr)
-  , head_     (nullptr)
-  , tail_     (nullptr)
-  , initial_size_(0) {}
+  : monotonic_buffer_resource(0, std::move(upstream)) {}
 
 monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size)
   : monotonic_buffer_resource(initial_size, allocator{}) {}
 
 monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size, allocator upstream)
-  : upstream_ (std::move(upstream))
-  , free_list_(make_node<node>(upstream_, initial_size, alignof(std::max_align_t)))
-  , head_     (free_list_ == nullptr ? reinterpret_cast<::LIBIMP::byte *>(free_list_) + sizeof(node) : nullptr)
-  , tail_     (head_ + initial_size)
-  , initial_size_(initial_size) {}
+  : upstream_      (std::move(upstream))
+  , free_list_     (nullptr)
+  , head_          (nullptr)
+  , tail_          (nullptr)
+  , next_size_     (initial_size)
+  , initial_buffer_(nullptr)
+  , initial_size_  (initial_size) {}
 
 monotonic_buffer_resource::monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer) noexcept
   : monotonic_buffer_resource(buffer, allocator{}) {}
 
 monotonic_buffer_resource::monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer, allocator upstream) noexcept
-  : upstream_ (std::move(upstream))
-  , free_list_(nullptr)
-  , head_     (buffer.begin())
-  , tail_     (buffer.end())
-  , initial_buffer_(buffer)
-  , initial_size_(initial_buffer_.size()) {}
+  : upstream_      (std::move(upstream))
+  , free_list_     (nullptr)
+  , head_          (buffer.begin())
+  , tail_          (buffer.end())
+  , next_size_     (next_buffer_size(buffer.size()))
+  , initial_buffer_(buffer.begin())
+  , initial_size_  (buffer.size()) {}
 
 monotonic_buffer_resource::~monotonic_buffer_resource() {
   release();
@@ -70,8 +75,14 @@ void monotonic_buffer_resource::release() {
     upstream_.deallocate(free_list_, free_list_->size);
     free_list_ = next;
   }
-  head_ = initial_buffer_.begin();
-  tail_ = initial_buffer_.end();
+  // reset to initial state at contruction
+  if ((head_ = initial_buffer_) != nullptr) {
+    tail_ = head_ + initial_size_;
+    next_size_ = next_buffer_size(initial_size_);
+  } else {
+    tail_ = nullptr;
+    next_size_ = initial_size_;
+  }
 }
 
 void *monotonic_buffer_resource::allocate(std::size_t bytes, std::size_t alignment) noexcept {
@@ -81,19 +92,21 @@ void *monotonic_buffer_resource::allocate(std::size_t bytes, std::size_t alignme
     return nullptr;
   }
   if ((alignment & (alignment - 1)) != 0) {
-    log.error("failed: allocate alignment is not power of 2.");
+    log.error("failed: allocate alignment is not a power of 2.");
     return nullptr;
   }
-  auto *p = reinterpret_cast<::LIBIMP::byte *>(::LIBIMP::round_up(reinterpret_cast<std::size_t>(head_), alignment));
-  auto remain = static_cast<std::size_t>(tail_ - p);
-  if (remain < bytes) {
-    initial_size_ = (std::max)(initial_size_ * 2, bytes);
-    auto *node = make_node<monotonic_buffer_resource::node>(upstream_, initial_size_, alignment);
+  void *p = head_;
+  auto  s = static_cast<std::size_t>(tail_ - head_);
+  if (std::align(alignment, bytes, p, s) == nullptr) {
+    next_size_ = (std::max)(next_size_, bytes);
+    auto *node = make_node<monotonic_buffer_resource::node>(upstream_, next_size_, alignment);
     if (node == nullptr) return nullptr;
     node->next = free_list_;
     free_list_ = node;
+    next_size_ = next_buffer_size(next_size_);
     p = reinterpret_cast<::LIBIMP::byte *>(free_list_) + ::LIBIMP::round_up(sizeof(node), alignment);
   }
+  head_ = static_cast<::LIBIMP::byte *>(p) + bytes;
   return p;
 }
 

From eee15dda027b0081e613eaef7839e1a8f7c20477 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 17 Sep 2023 16:59:32 +0800
Subject: [PATCH 218/272] Add unit tests for `monotonic_buffer_resource`.

---
 include/libpmr/memory_resource.h              |   4 +-
 src/libpmr/monotonic_buffer_resource.cpp      |  13 +-
 .../test_pmr_monotonic_buffer_resource.cpp    | 125 ++++++++++++++++++
 3 files changed, 139 insertions(+), 3 deletions(-)

diff --git a/include/libpmr/memory_resource.h b/include/libpmr/memory_resource.h
index 8ec6c9e6..be308532 100644
--- a/include/libpmr/memory_resource.h
+++ b/include/libpmr/memory_resource.h
@@ -22,7 +22,8 @@ struct has_allocate : std::false_type {};
 template <typename T>
 struct has_allocate<T, 
   typename std::enable_if<std::is_convertible<
-  decltype(std::declval<T &>().allocate(std::declval<std::size_t>())), void *
+  decltype(std::declval<T &>().allocate(std::declval<std::size_t>(), 
+                                        std::declval<std::size_t>())), void *
   >::value>::type> : std::true_type {};
 
 template <typename T, typename = void>
@@ -31,6 +32,7 @@ struct has_deallocate : std::false_type {};
 template <typename T>
 struct has_deallocate<T, 
   decltype(std::declval<T &>().deallocate(std::declval<void *>(), 
+                                          std::declval<std::size_t>(), 
                                           std::declval<std::size_t>()))
   > : std::true_type {};
 
diff --git a/src/libpmr/monotonic_buffer_resource.cpp b/src/libpmr/monotonic_buffer_resource.cpp
index 195aa862..7f2efddc 100644
--- a/src/libpmr/monotonic_buffer_resource.cpp
+++ b/src/libpmr/monotonic_buffer_resource.cpp
@@ -17,7 +17,8 @@ Node *make_node(allocator const &upstream, std::size_t initial_size, std::size_t
   auto sz = ::LIBIMP::round_up(sizeof(Node), alignment) + initial_size;
   auto *node = static_cast<Node *>(upstream.allocate(sz));
   if (node == nullptr) {
-    log.error("failed: allocate memory for `monotonic_buffer_resource`.");
+    log.error("failed: allocate memory for `monotonic_buffer_resource`'s node.", 
+              " bytes = ", initial_size, ", alignment = ", alignment);
     return nullptr;
   }
   node->next = nullptr;
@@ -104,7 +105,15 @@ void *monotonic_buffer_resource::allocate(std::size_t bytes, std::size_t alignme
     node->next = free_list_;
     free_list_ = node;
     next_size_ = next_buffer_size(next_size_);
-    p = reinterpret_cast<::LIBIMP::byte *>(free_list_) + ::LIBIMP::round_up(sizeof(node), alignment);
+    // try again
+    s = node->size - sizeof(monotonic_buffer_resource::node);
+    p = std::align(alignment, bytes, (p = node + 1), s);
+    if (p == nullptr) {
+      log.error("failed: allocate memory for `monotonic_buffer_resource`.", 
+                " bytes = ", bytes, ", alignment = ", alignment);
+      return nullptr;
+    }
+    tail_ = static_cast<::LIBIMP::byte *>(p) + s;
   }
   head_ = static_cast<::LIBIMP::byte *>(p) + bytes;
   return p;
diff --git a/test/pmr/test_pmr_monotonic_buffer_resource.cpp b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
index 1774519d..3a147094 100644
--- a/test/pmr/test_pmr_monotonic_buffer_resource.cpp
+++ b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
@@ -1,4 +1,8 @@
 
+#include <type_traits>
+#include <array>
+#include <cstdlib>
+
 #include "gtest/gtest.h"
 
 #include "libpmr/monotonic_buffer_resource.h"
@@ -13,3 +17,124 @@ TEST(monotonic_buffer_resource, construct) {
   pmr::monotonic_buffer_resource{imp::span<imp::byte>{}, pmr::allocator{}};
   SUCCEED();
 }
+
+TEST(monotonic_buffer_resource, no_copy) {
+  EXPECT_FALSE(std::is_copy_constructible<pmr::monotonic_buffer_resource>::value);
+  EXPECT_FALSE(std::is_copy_assignable<pmr::monotonic_buffer_resource>::value);
+  EXPECT_FALSE(std::is_move_constructible<pmr::monotonic_buffer_resource>::value);
+  EXPECT_FALSE(std::is_move_assignable<pmr::monotonic_buffer_resource>::value);
+}
+
+TEST(monotonic_buffer_resource, upstream_resource) {
+  struct dummy_allocator {
+    bool allocated = false;
+    void *allocate(std::size_t, std::size_t) noexcept { allocated = true; return nullptr; }
+    void deallocate(void *, std::size_t, std::size_t) noexcept {}
+  } dummy;
+  pmr::monotonic_buffer_resource tmp{&dummy};
+  ASSERT_EQ(tmp.upstream_resource().allocate(1), nullptr);
+  ASSERT_TRUE(dummy.allocated);
+}
+
+namespace {
+
+struct dummy_allocator {
+  std::size_t allocated = 0;
+  void *allocate(std::size_t size, std::size_t) noexcept {
+    allocated += size;
+    return std::malloc(size);
+  }
+  void deallocate(void *p, std::size_t size, std::size_t) noexcept {
+    allocated -= size;
+    std::free(p);
+  }
+};
+
+} // namespace
+
+TEST(monotonic_buffer_resource, allocate) {
+  dummy_allocator dummy;
+  {
+    pmr::monotonic_buffer_resource tmp{&dummy};
+    ASSERT_EQ(tmp.allocate(0), nullptr);
+    ASSERT_EQ(dummy.allocated, 0);
+  }
+  ASSERT_EQ(dummy.allocated, 0);
+  {
+    pmr::monotonic_buffer_resource tmp{&dummy};
+    std::size_t sz = 0;
+    for (std::size_t i = 1; i < 1024; ++i) {
+      ASSERT_NE(tmp.allocate(i), nullptr);
+      sz += i;
+    }
+    for (std::size_t i = 1; i < 1024; ++i) {
+      ASSERT_NE(tmp.allocate(1024 - i), nullptr);
+      sz += 1024 - i;
+    }
+    ASSERT_GE(dummy.allocated, sz);
+  }
+  ASSERT_EQ(dummy.allocated, 0);
+}
+
+TEST(monotonic_buffer_resource, allocate_by_buffer) {
+  dummy_allocator dummy;
+  std::array<imp::byte, 4096> buffer;
+  {
+    pmr::monotonic_buffer_resource tmp{buffer, &dummy};
+    for (std::size_t i = 1; i < 64; ++i) {
+      ASSERT_NE(tmp.allocate(i), nullptr);
+    }
+    ASSERT_EQ(dummy.allocated, 0);
+    std::size_t sz = 0;
+    for (std::size_t i = 1; i < 64; ++i) {
+      ASSERT_NE(tmp.allocate(64 - i), nullptr);
+      sz += 64 - i;
+    }
+    ASSERT_GT(dummy.allocated, sz);
+  }
+  ASSERT_EQ(dummy.allocated, 0);
+}
+#include <memory_resource>
+TEST(monotonic_buffer_resource, release) {
+  dummy_allocator dummy;
+  {
+    pmr::monotonic_buffer_resource tmp{&dummy};
+    tmp.release();
+    ASSERT_EQ(dummy.allocated, 0);
+    ASSERT_NE(tmp.allocate(1024), nullptr);
+    ASSERT_GE(dummy.allocated, 1024);
+    ASSERT_LE(dummy.allocated, 1024 * 1.5);
+    tmp.release();
+    ASSERT_EQ(dummy.allocated, 0);
+    ASSERT_NE(tmp.allocate(1024), nullptr);
+    ASSERT_GE(dummy.allocated, 1024);
+    ASSERT_LE(dummy.allocated, 1024 * 1.5);
+  }
+  ASSERT_EQ(dummy.allocated, 0);
+  std::array<imp::byte, 4096> buffer;
+  {
+    pmr::monotonic_buffer_resource tmp{buffer, &dummy};
+    auto *p = tmp.allocate(1024);
+    ASSERT_EQ(p, buffer.data());
+    p = tmp.allocate(10240);
+    ASSERT_NE(p, buffer.data());
+    ASSERT_LE(dummy.allocated, 10240 + 1024);
+    tmp.release();
+    ASSERT_EQ(dummy.allocated, 0);
+    p = tmp.allocate(1024);
+    ASSERT_EQ(p, buffer.data());
+    ASSERT_EQ(dummy.allocated, 0);
+  }
+  ASSERT_EQ(dummy.allocated, 0);
+  // {
+  //   std::pmr::monotonic_buffer_resource res{buffer.data(), buffer.size()};
+  //   std::pmr::polymorphic_allocator<imp::byte> tmp{&res};
+  //   auto *p = tmp.allocate(1024);
+  //   ASSERT_EQ(p, buffer.data());
+  //   p = tmp.allocate(10240);
+  //   ASSERT_NE(p, buffer.data());
+  //   res.release();
+  //   p = tmp.allocate(1024);
+  //   ASSERT_EQ(p, buffer.data());
+  // }
+}

From c07b14839d0b1aca26939862067f6537c5e82df3 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 17 Sep 2023 17:05:09 +0800
Subject: [PATCH 219/272] Remove `std::pmr` test codes.

---
 test/pmr/test_pmr_monotonic_buffer_resource.cpp | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/test/pmr/test_pmr_monotonic_buffer_resource.cpp b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
index 3a147094..209540a6 100644
--- a/test/pmr/test_pmr_monotonic_buffer_resource.cpp
+++ b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
@@ -94,7 +94,7 @@ TEST(monotonic_buffer_resource, allocate_by_buffer) {
   }
   ASSERT_EQ(dummy.allocated, 0);
 }
-#include <memory_resource>
+
 TEST(monotonic_buffer_resource, release) {
   dummy_allocator dummy;
   {
@@ -126,15 +126,4 @@ TEST(monotonic_buffer_resource, release) {
     ASSERT_EQ(dummy.allocated, 0);
   }
   ASSERT_EQ(dummy.allocated, 0);
-  // {
-  //   std::pmr::monotonic_buffer_resource res{buffer.data(), buffer.size()};
-  //   std::pmr::polymorphic_allocator<imp::byte> tmp{&res};
-  //   auto *p = tmp.allocate(1024);
-  //   ASSERT_EQ(p, buffer.data());
-  //   p = tmp.allocate(10240);
-  //   ASSERT_NE(p, buffer.data());
-  //   res.release();
-  //   p = tmp.allocate(1024);
-  //   ASSERT_EQ(p, buffer.data());
-  // }
 }

From 019a60b371fc8561d6a12764bcaaa8e3908bb2e8 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 17 Sep 2023 17:07:40 +0800
Subject: [PATCH 220/272] add unit test

---
 test/pmr/test_pmr_monotonic_buffer_resource.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/test/pmr/test_pmr_monotonic_buffer_resource.cpp b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
index 209540a6..fc0bdd5c 100644
--- a/test/pmr/test_pmr_monotonic_buffer_resource.cpp
+++ b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
@@ -116,6 +116,7 @@ TEST(monotonic_buffer_resource, release) {
     pmr::monotonic_buffer_resource tmp{buffer, &dummy};
     auto *p = tmp.allocate(1024);
     ASSERT_EQ(p, buffer.data());
+    ASSERT_EQ(dummy.allocated, 0);
     p = tmp.allocate(10240);
     ASSERT_NE(p, buffer.data());
     ASSERT_LE(dummy.allocated, 10240 + 1024);
@@ -124,6 +125,9 @@ TEST(monotonic_buffer_resource, release) {
     p = tmp.allocate(1024);
     ASSERT_EQ(p, buffer.data());
     ASSERT_EQ(dummy.allocated, 0);
+    p = tmp.allocate(10240);
+    ASSERT_NE(p, buffer.data());
+    ASSERT_LE(dummy.allocated, 10240 + 1024);
   }
   ASSERT_EQ(dummy.allocated, 0);
 }

From ec602f50af37baf7ce86707214619a0c0e9227b9 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 18 Sep 2023 00:11:30 +0800
Subject: [PATCH 221/272] fix ut

---
 src/libpmr/allocator.cpp                        | 11 +++++++++++
 src/libpmr/monotonic_buffer_resource.cpp        |  4 ----
 test/pmr/test_pmr_memory_resource.cpp           |  2 +-
 test/pmr/test_pmr_monotonic_buffer_resource.cpp | 12 ++++++------
 4 files changed, 18 insertions(+), 11 deletions(-)

diff --git a/src/libpmr/allocator.cpp b/src/libpmr/allocator.cpp
index 68eb9fc4..4f91848e 100644
--- a/src/libpmr/allocator.cpp
+++ b/src/libpmr/allocator.cpp
@@ -1,6 +1,7 @@
 
 #include <algorithm>  // std::swap
 
+#include "libimp/log.h"
 #include "libpmr/allocator.h"
 
 LIBPMR_NAMESPACE_BEG_
@@ -25,10 +26,20 @@ void allocator::swap(allocator &other) noexcept {
 }
 
 void *allocator::allocate(std::size_t s, std::size_t a) const {
+  LIBIMP_LOG_();
+  if ((a & (a - 1)) != 0) {
+    log.error("failed: allocate alignment is not a power of 2.");
+    return nullptr;
+  }
   return get_holder().alloc(s, a);
 }
 
 void allocator::deallocate(void *p, std::size_t s, std::size_t a) const {
+  LIBIMP_LOG_();
+  if ((a & (a - 1)) != 0) {
+    log.error("failed: allocate alignment is not a power of 2.");
+    return;
+  }
   get_holder().dealloc(p, s, a);
 }
 
diff --git a/src/libpmr/monotonic_buffer_resource.cpp b/src/libpmr/monotonic_buffer_resource.cpp
index 7f2efddc..f43d7237 100644
--- a/src/libpmr/monotonic_buffer_resource.cpp
+++ b/src/libpmr/monotonic_buffer_resource.cpp
@@ -92,10 +92,6 @@ void *monotonic_buffer_resource::allocate(std::size_t bytes, std::size_t alignme
     log.error("failed: allocate bytes = 0.");
     return nullptr;
   }
-  if ((alignment & (alignment - 1)) != 0) {
-    log.error("failed: allocate alignment is not a power of 2.");
-    return nullptr;
-  }
   void *p = head_;
   auto  s = static_cast<std::size_t>(tail_ - head_);
   if (std::align(alignment, bytes, p, s) == nullptr) {
diff --git a/test/pmr/test_pmr_memory_resource.cpp b/test/pmr/test_pmr_memory_resource.cpp
index f90e4d3b..b624135b 100644
--- a/test/pmr/test_pmr_memory_resource.cpp
+++ b/test/pmr/test_pmr_memory_resource.cpp
@@ -28,7 +28,7 @@ TEST(memory_resource, traits) {
   EXPECT_FALSE(pmr::has_allocate<void>::value);
   EXPECT_FALSE(pmr::has_allocate<int>::value);
   EXPECT_FALSE(pmr::has_allocate<std::vector<int>>::value);
-  EXPECT_TRUE (pmr::has_allocate<std::allocator<int>>::value);
+  EXPECT_FALSE(pmr::has_allocate<std::allocator<int>>::value);
 #if defined(LIBIMP_CPP_17) && defined(__cpp_lib_memory_resource)
   EXPECT_TRUE (pmr::has_allocate<std::pmr::memory_resource>::value);
   EXPECT_TRUE (pmr::has_allocate<std::pmr::polymorphic_allocator<int>>::value);
diff --git a/test/pmr/test_pmr_monotonic_buffer_resource.cpp b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
index fc0bdd5c..a4fe77aa 100644
--- a/test/pmr/test_pmr_monotonic_buffer_resource.cpp
+++ b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
@@ -102,13 +102,13 @@ TEST(monotonic_buffer_resource, release) {
     tmp.release();
     ASSERT_EQ(dummy.allocated, 0);
     ASSERT_NE(tmp.allocate(1024), nullptr);
-    ASSERT_GE(dummy.allocated, 1024);
-    ASSERT_LE(dummy.allocated, 1024 * 1.5);
+    ASSERT_GE(dummy.allocated, 1024u);
+    ASSERT_LE(dummy.allocated, 1024u * 1.5);
     tmp.release();
     ASSERT_EQ(dummy.allocated, 0);
     ASSERT_NE(tmp.allocate(1024), nullptr);
-    ASSERT_GE(dummy.allocated, 1024);
-    ASSERT_LE(dummy.allocated, 1024 * 1.5);
+    ASSERT_GE(dummy.allocated, 1024u);
+    ASSERT_LE(dummy.allocated, 1024u * 1.5);
   }
   ASSERT_EQ(dummy.allocated, 0);
   std::array<imp::byte, 4096> buffer;
@@ -119,7 +119,7 @@ TEST(monotonic_buffer_resource, release) {
     ASSERT_EQ(dummy.allocated, 0);
     p = tmp.allocate(10240);
     ASSERT_NE(p, buffer.data());
-    ASSERT_LE(dummy.allocated, 10240 + 1024);
+    ASSERT_LE(dummy.allocated, 10240u + 1024u);
     tmp.release();
     ASSERT_EQ(dummy.allocated, 0);
     p = tmp.allocate(1024);
@@ -127,7 +127,7 @@ TEST(monotonic_buffer_resource, release) {
     ASSERT_EQ(dummy.allocated, 0);
     p = tmp.allocate(10240);
     ASSERT_NE(p, buffer.data());
-    ASSERT_LE(dummy.allocated, 10240 + 1024);
+    ASSERT_LE(dummy.allocated, 10240u + 1024u);
   }
   ASSERT_EQ(dummy.allocated, 0);
 }

From 872b97f1d305ee37e9815c14a14af7978804f1df Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 22 Oct 2023 17:39:43 +0800
Subject: [PATCH 222/272] Add `-fsanitize=address` for memory leak and
 out-of-bounds detection.

---
 CMakeLists.txt                       |  5 ++--
 include/libpmr/small_storage.h       | 42 ++++++++++++++++----------
 src/libipc/platform/posix/shm_impl.h | 16 +++++-----
 src/libipc/platform/win/mmap_impl.h  |  4 +--
 src/libipc/shm.cpp                   |  2 +-
 src/libpmr/memory_resource.cpp       |  4 ++-
 test/imp/test_imp_byte.cpp           | 10 +++++--
 test/pmr/test_pmr_small_storage.cpp  | 45 ++++++++++++++++++----------
 8 files changed, 79 insertions(+), 49 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 479b6789..d47282fc 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,7 +12,7 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -DNDEBUG")
 if(NOT MSVC)
   set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O2")
-  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_DEBUG} -g -rdynamic")
+  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -g -rdynamic -fsanitize=address")
 endif()
 
 if (MSVC)
@@ -22,8 +22,7 @@ if (MSVC)
       CMAKE_CXX_FLAGS_RELEASE
       CMAKE_C_FLAGS
       CMAKE_C_FLAGS_DEBUG
-      CMAKE_C_FLAGS_RELEASE
-      )
+      CMAKE_C_FLAGS_RELEASE)
   if (LIBIPC_USE_STATIC_CRT)
       foreach(CompilerFlag ${CompilerFlags})
         string(REPLACE "/MD" "/MT" ${CompilerFlag} "${${CompilerFlag}}")
diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
index faff4590..58d6792a 100644
--- a/include/libpmr/small_storage.h
+++ b/include/libpmr/small_storage.h
@@ -204,6 +204,8 @@ class holder<Value, false> : public holder_base {
 
 namespace detail {
 
+/// \struct holder_type_base
+/// \brief Defines the holder type operation interface.
 struct holder_type_base {
   virtual ~holder_type_base() noexcept = default;
   virtual std::size_t size() const noexcept = 0;
@@ -213,6 +215,8 @@ struct holder_type_base {
   virtual void dest(void *p, std::size_t n) const noexcept = 0;
 };
 
+/// \struct template <typename Value> holder_type
+/// \brief Defines generalization operations for different data types.
 template <typename Value>
 struct holder_type : holder_type_base {
   std::size_t           size() const noexcept override { return sizeof(Value); }
@@ -240,6 +244,10 @@ struct holder_info {
   std::size_t count;
 };
 
+struct holder_data : holder_info {
+  alignas(std::max_align_t) char ___data;
+};
+
 template <typename Value>
 std::size_t full_sizeof(std::size_t count) noexcept {
   return ::LIBIMP::round_up(sizeof(detail::holder_info), alignof(std::max_align_t))
@@ -252,29 +260,31 @@ std::size_t full_sizeof(holder_info const *info) noexcept {
 }
 
 void *value_ptr(holder_info *info) noexcept {
-  return reinterpret_cast<void *>(
-      ::LIBIMP::round_up(reinterpret_cast<std::size_t>(info + 1), alignof(std::max_align_t)));
+  if (info == nullptr) return nullptr;
+  return &static_cast<holder_data *>(info)->___data;
 }
 
 void const *value_ptr(holder_info const *info) noexcept {
-  return reinterpret_cast<void const *>(
-      ::LIBIMP::round_up(reinterpret_cast<std::size_t>(info + 1), alignof(std::max_align_t)));
+  if (info == nullptr) return nullptr;
+  return &static_cast<holder_data const *>(info)->___data;
 }
 
-class holder_info_ptr {
+/// \class holder_data_builder
+/// \brief The data pointer builder.
+class holder_data_builder {
   allocator const &alloc_;
-  holder_info **pptr_;
+  holder_data **pptr_;
   std::size_t size_;
 
 public:
-  holder_info_ptr(allocator const &alloc, holder_info *(&ptr), std::size_t sz) noexcept
+  holder_data_builder(allocator const &alloc, holder_data *(&ptr), std::size_t sz) noexcept
     : alloc_(alloc)
     , pptr_ (&ptr)
-    , size_ (::LIBIMP::round_up(sizeof(holder_info), alignof(std::max_align_t)) + sz) {
-    *pptr_ = static_cast<holder_info *>(alloc_.allocate(size_));
+    , size_ (detail::full_sizeof<::LIBIMP::byte>(sz)) {
+    *pptr_ = static_cast<holder_data *>(alloc_.allocate(size_));
   }
 
-  ~holder_info_ptr() noexcept {
+  ~holder_data_builder() noexcept {
     if (pptr_ == nullptr) return;
     alloc_.deallocate(*pptr_, size_);
     *pptr_ = nullptr;
@@ -284,11 +294,11 @@ class holder_info_ptr {
     return (pptr_ != nullptr) && (*pptr_ != nullptr);
   }
 
-  holder_info *operator->() const noexcept {
+  holder_data *operator->() const noexcept {
     return *pptr_;
   }
 
-  holder_info_ptr &operator=(holder_info const &rhs) noexcept {
+  holder_data_builder &operator=(holder_data const &rhs) noexcept {
     if (!*this) return *this;
     **pptr_ = rhs;
     return *this;
@@ -308,7 +318,7 @@ class holder_info_ptr {
 template <>
 class holder<void, true> : public holder_base {
 
-  detail::holder_info info_;
+  detail::holder_data info_;
 
 public:
   template <typename Value>
@@ -385,7 +395,7 @@ class holder<void, true> : public holder_base {
 template <>
 class holder<void, false> : public holder_base {
 
-  detail::holder_info *info_ptr_;
+  detail::holder_data *info_ptr_;
 
 public:
   holder() noexcept
@@ -397,7 +407,7 @@ class holder<void, false> : public holder_base {
             std::enable_if_t<alignof(Value) <= alignof(std::max_align_t), bool> = true>
   holder(allocator const &alloc, ::LIBIMP::types<Value>, std::size_t n) : holder() {
     LIBIMP_LOG_("holder<void, false>");
-    detail::holder_info_ptr info_p{alloc, info_ptr_, sizeof(Value) * n};
+    detail::holder_data_builder info_p{alloc, info_ptr_, sizeof(Value) * n};
     if (!info_p) {
       log.error("The destination information-pointer failed to be constructed."
                 " type size = ", sizeof(Value),
@@ -452,7 +462,7 @@ class holder<void, false> : public holder_base {
     LIBIMP_LOG_();
     auto *des = ::LIBIMP::construct<holder>(p);
     if (!valid()) return;
-    detail::holder_info_ptr info_p{alloc, des->info_ptr_, this->sizeof_type() * this->count()};
+    detail::holder_data_builder info_p{alloc, des->info_ptr_, this->sizeof_type() * this->count()};
     if (!info_p) {
       log.error("The destination information-pointer failed to be constructed."
                 " type size = ", this->sizeof_type(),
diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
index 91b09bb7..f335862e 100644
--- a/src/libipc/platform/posix/shm_impl.h
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -53,8 +53,10 @@ result<int> shm_open_fd(std::string const &name, mode::type type) noexcept {
     log.error("name is empty.");
     return std::make_error_code(std::errc::invalid_argument);
   }
-
-  /// \brief Open the object for read-write access.
+  // For portable use, a shared memory object should be identified by name of the form /somename.
+  // see: https://man7.org/linux/man-pages/man3/shm_open.3.html
+  std::string op_name = '/' + name;
+  // Open the object for read-write access.
   int flag = O_RDWR;
   switch (type) {
   case mode::open:
@@ -73,13 +75,13 @@ result<int> shm_open_fd(std::string const &name, mode::type type) noexcept {
     return std::make_error_code(std::errc::invalid_argument);
   }
 
-  /// \brief Create/Open POSIX shared memory bject
-  int fd = ::shm_open(name.c_str(), flag, S_IRUSR | S_IWUSR |
-                                          S_IRGRP | S_IWGRP |
-                                          S_IROTH | S_IWOTH);
+  // Create/Open POSIX shared memory bject.
+  int fd = ::shm_open(op_name.c_str(), flag, S_IRUSR | S_IWUSR |
+                                             S_IRGRP | S_IWGRP |
+                                             S_IROTH | S_IWOTH);
   if (fd == posix::failed) {
     auto err = sys::error();
-    log.error("failed: shm_open(name = ", name, 
+    log.error("failed: shm_open(name = ", op_name, 
                              ", type = ", type, 
                            "). error = ", err);
     return err;
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index a28ef1b0..e911a98f 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -72,7 +72,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     return std::make_error_code(std::errc::invalid_argument);
   }
 
-  /// \brief Opens a named file mapping object.
+  // Opens a named file mapping object.
   auto try_open = [&]() -> result<HANDLE> {
     HANDLE h = ::OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, t_name.c_str());
     if (h == NULL) {
@@ -83,7 +83,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     return h;
   };
 
-  /// \brief Creates or opens a named or unnamed file mapping object for a specified file.
+  // Creates or opens a named or unnamed file mapping object for a specified file.
   auto try_create = [&]() -> result<HANDLE> {
     HANDLE h = ::CreateFileMapping(INVALID_HANDLE_VALUE, detail::get_sa(), PAGE_READWRITE | SEC_COMMIT,
                                    /// \remark dwMaximumSizeHigh always 0 here.
diff --git a/src/libipc/shm.cpp b/src/libipc/shm.cpp
index 40ef31d8..4b6d54d9 100644
--- a/src/libipc/shm.cpp
+++ b/src/libipc/shm.cpp
@@ -57,7 +57,7 @@ shared_memory::shared_memory(shared_memory &&other) noexcept
   : shm_(std::exchange(other.shm_, nullptr)) {}
 
 shared_memory &shared_memory::operator=(shared_memory &&rhs) & noexcept {
-  this->shm_ = std::exchange(rhs.shm_, nullptr);
+  shared_memory(std::move(rhs)).swap(*this);
   return *this;
 }
 
diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
index 726fc02c..7231154f 100644
--- a/src/libpmr/memory_resource.cpp
+++ b/src/libpmr/memory_resource.cpp
@@ -4,6 +4,7 @@
 #include "libimp/detect_plat.h"
 #include "libimp/system.h"
 #include "libimp/log.h"
+#include "libimp/aligned.h"
 
 #include "libpmr/memory_resource.h"
 
@@ -52,7 +53,8 @@ void *new_delete_resource::allocate(std::size_t bytes, std::size_t alignment) no
   }
 #if defined(LIBIMP_CPP_17)
   /// \see https://en.cppreference.com/w/cpp/memory/c/aligned_alloc
-  return std::aligned_alloc(alignment, bytes);
+  /// \remark The size parameter must be an integral multiple of alignment.
+  return std::aligned_alloc(alignment, ::LIBIMP::round_up(bytes, alignment));
 #else
   if (alignment <= alignof(std::max_align_t)) {
     /// \see https://en.cppreference.com/w/cpp/memory/c/malloc
diff --git a/test/imp/test_imp_byte.cpp b/test/imp/test_imp_byte.cpp
index c853c2ec..a21daeef 100644
--- a/test/imp/test_imp_byte.cpp
+++ b/test/imp/test_imp_byte.cpp
@@ -8,19 +8,23 @@
 TEST(byte, construct) {
   {
     imp::byte b;
+    SUCCEED();
+  }
+  {
+    imp::byte b{};
     EXPECT_EQ(int(b), 0);
   }
   {
-    imp::byte b {123};
+    imp::byte b{123};
     EXPECT_EQ(int(b), 123);
   }
   {
-    imp::byte b {65535};
+    imp::byte b{65535};
     EXPECT_EQ(int(b), 255);
     EXPECT_EQ(std::int8_t(b), -1);
   }
   {
-    imp::byte b {65536};
+    imp::byte b{65536};
     EXPECT_EQ(int(b), 0);
   }
 }
diff --git a/test/pmr/test_pmr_small_storage.cpp b/test/pmr/test_pmr_small_storage.cpp
index 88914ab8..0f575134 100644
--- a/test/pmr/test_pmr_small_storage.cpp
+++ b/test/pmr/test_pmr_small_storage.cpp
@@ -41,14 +41,18 @@ TEST(small_storage, holder_copy_move_construct) {
   EXPECT_FALSE((std::is_move_assignable<pmr::holder<void, false>>::value));
 }
 
-TEST(small_storage, holder_copy_move) {
-  struct foo {
-    int i;
-    foo(int i) : i(i) {}
-    foo(foo const &rhs) : i(rhs.i) {}
-    foo(foo &&rhs) : i(std::exchange(rhs.i, 0)) {}
-  };
+namespace {
 
+struct foo {
+  int i;
+  foo(int i) : i(i) {}
+  foo(foo const &rhs) : i(rhs.i) {}
+  foo(foo &&rhs) : i(std::exchange(rhs.i, 0)) {}
+};
+
+} // namespace
+
+TEST(small_storage, holder_copy_move_object_stack) {
   pmr::allocator alc;
   pmr::holder<foo, true> h1(alc, 1);
   pmr::holder<foo, true> h2, h3;
@@ -61,7 +65,10 @@ TEST(small_storage, holder_copy_move) {
   h1.destroy(alc);
   h2.destroy(alc);
   h3.destroy(alc);
+}
 
+TEST(small_storage, holder_copy_move_object_heap) {
+  pmr::allocator alc;
   pmr::holder<foo, false> h4(alc, 1);
   pmr::holder<foo, false> h5, h6;
   h4.copy_to(alc, &h5);
@@ -73,17 +80,20 @@ TEST(small_storage, holder_copy_move) {
   h4.destroy(alc);
   h5.destroy(alc);
   h6.destroy(alc);
+}
 
+TEST(small_storage, holder_copy_move_array_stack) {
+  pmr::allocator alc;
   void *ph1 = std::malloc(pmr::holder<void, true>::full_sizeof<int>(10));
   void *ph2 = std::malloc(pmr::holder<void, true>::full_sizeof<int>(10));
   void *ph3 = std::malloc(pmr::holder<void, true>::full_sizeof<int>(10));
   auto *h7 = ::new (ph1) pmr::holder<void, true>(alc, ::LIBIMP::types<int>{}, 10);
-  auto *h8 = ::new (ph2) pmr::holder<void, true>;
-  auto *h9 = ::new (ph2) pmr::holder<void, true>;
-  h7->copy_to(alc, h8);
+  auto *h8 = static_cast<pmr::holder<void, true> *>(ph2);
+  auto *h9 = static_cast<pmr::holder<void, true> *>(ph3);
+  h7->copy_to(alc, ph2);
   EXPECT_EQ(h7->count(), 10);
   EXPECT_EQ(h8->count(), 10);
-  h7->move_to(alc, h9);
+  h7->move_to(alc, ph3);
   EXPECT_EQ(h7->count(), 0);
   EXPECT_EQ(h9->count(), 10);
   h7->destroy(alc);
@@ -92,7 +102,10 @@ TEST(small_storage, holder_copy_move) {
   std::free(ph1);
   std::free(ph2);
   std::free(ph3);
+}
 
+TEST(small_storage, holder_copy_move_array_heap) {
+  pmr::allocator alc;
   pmr::holder<void, false> h10(alc, ::LIBIMP::types<int>{}, 10);
   pmr::holder<void, false> h11, h12;
   h10.copy_to(alc, &h11);
@@ -110,14 +123,14 @@ TEST(small_storage, sizeof) {
   EXPECT_EQ(sizeof(pmr::holder_null), sizeof(void *));
   EXPECT_EQ(sizeof(pmr::holder<int, true>), sizeof(void *) + imp::round_up(sizeof(int), alignof(void *)));
   EXPECT_EQ(sizeof(pmr::holder<int, false>), sizeof(void *) + sizeof(void *));
-  EXPECT_EQ(sizeof(pmr::holder<void, true>), sizeof(void *) + sizeof(pmr::detail::holder_info));
+  EXPECT_EQ(sizeof(pmr::holder<void, true>), imp::round_up(sizeof(void *) + sizeof(pmr::detail::holder_data), alignof(std::max_align_t)));
   EXPECT_EQ(sizeof(pmr::holder<void, false>), sizeof(void *) + sizeof(void *));
 
   // pmr::small_storage<4> s1;
-  EXPECT_TRUE(sizeof(pmr::small_storage<16>)   > 16);
-  EXPECT_TRUE(sizeof(pmr::small_storage<64>)   > 64);
-  EXPECT_TRUE(sizeof(pmr::small_storage<512>)  > 512);
-  EXPECT_TRUE(sizeof(pmr::small_storage<4096>) > 4096);
+  EXPECT_GT(sizeof(pmr::small_storage<16>)  , 16);
+  EXPECT_GT(sizeof(pmr::small_storage<64>)  , 64);
+  EXPECT_GT(sizeof(pmr::small_storage<512>) , 512);
+  EXPECT_GT(sizeof(pmr::small_storage<4096>), 4096);
 }
 
 TEST(small_storage, construct) {

From 3b268e0fbfe02ab458351eae78ecea7e51b9db8a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 22 Oct 2023 18:22:32 +0800
Subject: [PATCH 223/272] add `/fsanitize=address` for MSVC DEBUG

---
 CMakeLists.txt | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d47282fc..dc686449 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,13 +9,9 @@ option(LIBIPC_USE_STATIC_CRT    "Set to ON to build with static CRT on Windows (
 
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -DNDEBUG")
-if(NOT MSVC)
-  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O2")
-  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -g -rdynamic -fsanitize=address")
-endif()
 
 if (MSVC)
+  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /fsanitize=address /Zi")
   set(CompilerFlags
       CMAKE_CXX_FLAGS
       CMAKE_CXX_FLAGS_DEBUG
@@ -34,6 +30,9 @@ if (MSVC)
         string(REPLACE "/MTd" "/MDd" ${CompilerFlag} "${${CompilerFlag}}")
       endforeach()
   endif()
+else()
+  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -DNDEBUG -O2")
+  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -g -rdynamic -fsanitize=address")
 endif()
 
 set(LIBRARY_OUTPUT_PATH    ${CMAKE_BINARY_DIR}/bin)

From 9d4b4822241744066626ed0b9806ccb444a462fa Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 28 Oct 2023 11:21:28 +0800
Subject: [PATCH 224/272] add LIBIMP_UNUSED for ut

---
 test/imp/test_imp_byte.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/test/imp/test_imp_byte.cpp b/test/imp/test_imp_byte.cpp
index a21daeef..5ce48d1f 100644
--- a/test/imp/test_imp_byte.cpp
+++ b/test/imp/test_imp_byte.cpp
@@ -4,10 +4,11 @@
 #include "libimp/byte.h"
 #include "libimp/span.h"
 #include "libimp/fmt.h"
+#include "libimp/detect_plat.h"
 
 TEST(byte, construct) {
   {
-    imp::byte b;
+    LIBIMP_UNUSED imp::byte b;
     SUCCEED();
   }
   {

From ffb82029d96a090210588be81235c2ab73859b2b Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 28 Oct 2023 18:58:16 +0800
Subject: [PATCH 225/272] Update .gitignore

---
 .gitignore | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/.gitignore b/.gitignore
index a6a665e3..0f34e242 100644
--- a/.gitignore
+++ b/.gitignore
@@ -44,7 +44,4 @@ CMakeLists.txt.user*
 
 # My output files
 build*
-
-# vs
-.vs
-.vscode
\ No newline at end of file
+.*
\ No newline at end of file

From 9bd8813d46cf333322a27fb3392aad6985d43277 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 18 Nov 2023 16:10:24 +0800
Subject: [PATCH 226/272] rename `concur::queue` => ``concur::circular_queue`

---
 benchmark/benchmark_concur.cpp                     |  8 ++++----
 include/libconcur/{queue.h => circular_queue.h}    |  2 +-
 ...ur_queue.cpp => test_concur_circular_queue.cpp} | 14 +++++++-------
 3 files changed, 12 insertions(+), 12 deletions(-)
 rename include/libconcur/{queue.h => circular_queue.h} (97%)
 rename test/concur/{test_concur_queue.cpp => test_concur_circular_queue.cpp} (93%)

diff --git a/benchmark/benchmark_concur.cpp b/benchmark/benchmark_concur.cpp
index 24c6331b..046510a7 100644
--- a/benchmark/benchmark_concur.cpp
+++ b/benchmark/benchmark_concur.cpp
@@ -6,13 +6,13 @@
 
 #include "benchmark/benchmark.h"
 
-#include "libconcur/queue.h"
+#include "libconcur/circular_queue.h"
 
 namespace {
 
 void concur_queue_rtt(benchmark::State &state) {
   using namespace concur;
-  queue<std::int64_t, relation::single, relation::single> que [2];
+  circular_queue<std::int64_t, relation::single, relation::single> que [2];
   std::atomic_bool stop = false;
   auto producer = std::async(std::launch::async, [&stop, &que] {
     for (std::int64_t i = 0; !stop.load(std::memory_order_relaxed); ++i) {
@@ -35,7 +35,7 @@ void concur_queue_rtt(benchmark::State &state) {
 
 void concur_queue_1v1(benchmark::State &state) {
   using namespace concur;
-  queue<std::int64_t, relation::single, relation::single> que;
+  circular_queue<std::int64_t, relation::single, relation::single> que;
   std::atomic_bool stop = false;
   auto producer = std::async(std::launch::async, [&stop, &que] {
     for (std::int64_t i = 0; !stop.load(std::memory_order_relaxed); ++i) {
@@ -56,7 +56,7 @@ void concur_queue_1v1(benchmark::State &state) {
 void concur_queue_NvN(benchmark::State &state) {
   using namespace concur;
 
-  static queue<std::int64_t, relation::multi, relation::multi> que;
+  static circular_queue<std::int64_t, relation::multi, relation::multi> que;
   static std::atomic_int run = 0;
   static std::vector<std::thread> prods;
 
diff --git a/include/libconcur/queue.h b/include/libconcur/circular_queue.h
similarity index 97%
rename from include/libconcur/queue.h
rename to include/libconcur/circular_queue.h
index a8daed08..d77a556e 100644
--- a/include/libconcur/queue.h
+++ b/include/libconcur/circular_queue.h
@@ -13,7 +13,7 @@ LIBCONCUR_NAMESPACE_BEG_
 
 template <typename T, typename PRelationT = relation::multi
                     , typename CRelationT = relation::multi>
-class queue
+class circular_queue
   : public data_model<T, trans::unicast, PRelationT, CRelationT> {
 
   using base_t = data_model<T, trans::unicast, PRelationT, CRelationT>;
diff --git a/test/concur/test_concur_queue.cpp b/test/concur/test_concur_circular_queue.cpp
similarity index 93%
rename from test/concur/test_concur_queue.cpp
rename to test/concur/test_concur_circular_queue.cpp
index 458dfa6a..018b79c3 100644
--- a/test/concur/test_concur_queue.cpp
+++ b/test/concur/test_concur_circular_queue.cpp
@@ -7,14 +7,14 @@
 
 #include "gtest/gtest.h"
 
-#include "libconcur/queue.h"
+#include "libconcur/circular_queue.h"
 #include "libimp/log.h"
 #include "libimp/nameof.h"
 
 using namespace concur;
 
-TEST(queue, construct) {
-  using queue_t = queue<int>;
+TEST(circular_queue, construct) {
+  using queue_t = circular_queue<int>;
   queue_t q1;
   EXPECT_TRUE(q1.valid());
   EXPECT_TRUE(q1.empty());
@@ -25,7 +25,7 @@ namespace {
 
 template <typename PR, typename CR>
 void test_queue_basic() {
-  using queue_t = queue<int, PR, CR>;
+  using queue_t = circular_queue<int, PR, CR>;
   queue_t q1;
   EXPECT_TRUE(q1.valid());
   EXPECT_TRUE(q1.empty());
@@ -74,7 +74,7 @@ void test_queue_basic() {
 
 } // namespace
 
-TEST(queue, push_pop) {
+TEST(circular_queue, push_pop) {
   test_queue_basic<relation::single, relation::single>();
   test_queue_basic<relation::single, relation::multi >();
   test_queue_basic<relation::multi , relation::multi >();
@@ -91,7 +91,7 @@ void test_queue(std::size_t np, std::size_t nc) {
     std::uint64_t n;
     std::uint64_t i;
   };
-  queue<Data, PR, CR> que;
+  circular_queue<Data, PR, CR> que;
 
   constexpr static std::uint32_t loop_size = 10'0000;
 
@@ -139,7 +139,7 @@ void test_queue(std::size_t np, std::size_t nc) {
 
 } // namespace
 
-TEST(queue, multi_thread) {
+TEST(circular_queue, multi_thread) {
   using namespace concur;
 
   /// \brief 1-1

From bdc8839c0c01dd5d0cea1dfe41875992c2f535ee Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 17 Dec 2023 16:57:38 +0800
Subject: [PATCH 227/272] add: [concur] intrusive stack implementation

---
 include/libconcur/circular_queue.h  |  2 +-
 include/libconcur/intrusive_stack.h | 59 ++++++++++++++++++
 test/concur/test_concur_stack.cpp   | 92 +++++++++++++++++++++++++++++
 3 files changed, 152 insertions(+), 1 deletion(-)
 create mode 100644 include/libconcur/intrusive_stack.h
 create mode 100644 test/concur/test_concur_stack.cpp

diff --git a/include/libconcur/circular_queue.h b/include/libconcur/circular_queue.h
index d77a556e..59c07e81 100644
--- a/include/libconcur/circular_queue.h
+++ b/include/libconcur/circular_queue.h
@@ -1,7 +1,7 @@
 /**
  * \file libconcur/queue.h
  * \author mutouyun (orz@orzz.org)
- * \brief Define concurrent queue.
+ * \brief Define concurrent circular queue.
  * \date 2022-11-19
  */
 #pragma once
diff --git a/include/libconcur/intrusive_stack.h b/include/libconcur/intrusive_stack.h
new file mode 100644
index 00000000..abaf7356
--- /dev/null
+++ b/include/libconcur/intrusive_stack.h
@@ -0,0 +1,59 @@
+/**
+ * \file libconcur/intrusive_stack.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define concurrent intrusive stack.
+ * \date 2023-11-18
+ */
+#pragma once
+
+#include <atomic>
+
+#include "libconcur/def.h"
+
+LIBCONCUR_NAMESPACE_BEG_
+
+template <typename T>
+class intrusive_stack {
+public:
+  struct node {
+    T value;
+    std::atomic<node *> next{nullptr};
+  };
+
+private:
+  std::atomic<node *> top_{nullptr};
+
+public:
+  intrusive_stack(intrusive_stack const &) = delete;
+  intrusive_stack(intrusive_stack &&) = delete;
+  intrusive_stack &operator=(intrusive_stack const &) = delete;
+  intrusive_stack &operator=(intrusive_stack &&) = delete;
+
+  constexpr intrusive_stack() noexcept = default;
+
+  bool empty() const noexcept {
+    return top_.load(std::memory_order_acquire) == nullptr;
+  }
+
+  void push(node *n) noexcept {
+    node *old_top = top_.load(std::memory_order_acquire);
+    do {
+      n->next.store(old_top, std::memory_order_relaxed);
+    } while (!top_.compare_exchange_weak(old_top, n, std::memory_order_release
+                                                   , std::memory_order_acquire));
+  }
+
+  node *pop() noexcept {
+    node *old_top = top_.load(std::memory_order_acquire);
+    do {
+      if (old_top == nullptr) {
+        return nullptr;
+      }
+    } while (!top_.compare_exchange_weak(old_top, old_top->next.load(std::memory_order_relaxed)
+                                                   , std::memory_order_release
+                                                   , std::memory_order_acquire));
+    return old_top;
+  }
+};
+
+LIBCONCUR_NAMESPACE_END_
diff --git a/test/concur/test_concur_stack.cpp b/test/concur/test_concur_stack.cpp
new file mode 100644
index 00000000..6dc8428f
--- /dev/null
+++ b/test/concur/test_concur_stack.cpp
@@ -0,0 +1,92 @@
+
+#include "gtest/gtest.h"
+
+#define private public
+#include "libconcur/intrusive_stack.h"
+
+TEST(intrusive_stack, construct) {
+  concur::intrusive_stack<int> s;
+  EXPECT_TRUE(s.empty());
+}
+
+TEST(intrusive_stack, construct_node) {
+  concur::intrusive_stack<int>::node n;
+  EXPECT_TRUE(n.next.load(std::memory_order_relaxed) == nullptr);
+}
+
+TEST(intrusive_stack, copyable) {
+  EXPECT_FALSE(std::is_copy_constructible<concur::intrusive_stack<int>>::value);
+  EXPECT_FALSE(std::is_copy_assignable<concur::intrusive_stack<int>>::value);
+}
+
+TEST(intrusive_stack, moveable) {
+  EXPECT_FALSE(std::is_move_constructible<concur::intrusive_stack<int>>::value);
+  EXPECT_FALSE(std::is_move_assignable<concur::intrusive_stack<int>>::value);
+}
+
+TEST(intrusive_stack, push_one) {
+  concur::intrusive_stack<int> s;
+  concur::intrusive_stack<int>::node n;
+  s.push(&n);
+  EXPECT_FALSE(s.empty());
+  EXPECT_TRUE(s.top_.load(std::memory_order_relaxed) == &n);
+  EXPECT_TRUE(n.next.load(std::memory_order_relaxed) == nullptr);
+}
+
+TEST(intrusive_stack, push_many) {
+  concur::intrusive_stack<int> s;
+  concur::intrusive_stack<int>::node n1;
+  concur::intrusive_stack<int>::node n2;
+  concur::intrusive_stack<int>::node n3;
+  s.push(&n1);
+  s.push(&n2);
+  s.push(&n3);
+  EXPECT_FALSE(s.empty());
+  EXPECT_TRUE(s.top_.load(std::memory_order_relaxed) == &n3);
+  EXPECT_TRUE(n3.next.load(std::memory_order_relaxed) == &n2);
+  EXPECT_TRUE(n2.next.load(std::memory_order_relaxed) == &n1);
+  EXPECT_TRUE(n1.next.load(std::memory_order_relaxed) == nullptr);
+}
+
+TEST(intrusive_stack, push_same) {
+  concur::intrusive_stack<int> s;
+  concur::intrusive_stack<int>::node n;
+  s.push(&n);
+  s.push(&n);
+  EXPECT_FALSE(s.empty());
+  EXPECT_TRUE(s.top_.load(std::memory_order_relaxed) == &n);
+  EXPECT_TRUE(n.next.load(std::memory_order_relaxed) == &n);
+}
+
+TEST(intrusive_stack, pop_empty) {
+  concur::intrusive_stack<int> s;
+  EXPECT_TRUE(s.pop() == nullptr);
+}
+
+TEST(intrusive_stack, pop_one) {
+  concur::intrusive_stack<int> s;
+  concur::intrusive_stack<int>::node n;
+  s.push(&n);
+  EXPECT_TRUE(s.pop() == &n);
+  EXPECT_TRUE(s.empty());
+  EXPECT_TRUE(s.top_.load(std::memory_order_relaxed) == nullptr);
+  EXPECT_TRUE(n.next.load(std::memory_order_relaxed) == nullptr);
+}
+
+TEST(intrusive_stack, pop_many) {
+  concur::intrusive_stack<int> s;
+  concur::intrusive_stack<int>::node n1;
+  concur::intrusive_stack<int>::node n2;
+  concur::intrusive_stack<int>::node n3;
+  s.push(&n1);
+  s.push(&n2);
+  s.push(&n3);
+  EXPECT_TRUE(s.pop() == &n3);
+  EXPECT_TRUE(s.pop() == &n2);
+  EXPECT_TRUE(s.pop() == &n1);
+  EXPECT_TRUE(s.empty());
+  EXPECT_TRUE(s.top_.load(std::memory_order_relaxed) == nullptr);
+  EXPECT_TRUE(n3.next.load(std::memory_order_relaxed) == &n2);
+  EXPECT_TRUE(n2.next.load(std::memory_order_relaxed) == &n1);
+  EXPECT_TRUE(n1.next.load(std::memory_order_relaxed) == nullptr);
+}

From a8c6654178fa597f9a2adbe2666c8e44fce65784 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 17 Dec 2023 18:09:53 +0800
Subject: [PATCH 228/272] add: [pmr] block pool implementation (TBD)

---
 include/libpmr/block_pool.h      | 131 +++++++++++++++++++++++++++++++
 include/libpmr/def.h             |   4 +
 test/pmr/test_pmr_block_pool.cpp |   7 ++
 3 files changed, 142 insertions(+)
 create mode 100644 include/libpmr/block_pool.h
 create mode 100644 test/pmr/test_pmr_block_pool.cpp

diff --git a/include/libpmr/block_pool.h b/include/libpmr/block_pool.h
new file mode 100644
index 00000000..f38ecbb7
--- /dev/null
+++ b/include/libpmr/block_pool.h
@@ -0,0 +1,131 @@
+/**
+ * \file libpmr/block_pool.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Fixed-length memory block pool.
+ * \date 2023-11-18
+ */
+#pragma once
+
+#include <cstddef>
+#include <new>
+#include <array>
+#include <deque>
+
+#include "libimp/byte.h"
+#include "libconcur/intrusive_stack.h"
+
+#include "libpmr/def.h"
+#include "libpmr/memory_resource.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/**
+ * \brief The block type.
+ * \tparam BlockSize specifies the memory block size
+*/
+template <std::size_t BlockSize>
+union block {
+  block *next;
+  alignas(std::max_align_t) std::array<::LIBIMP::byte, BlockSize> storage;
+};
+
+/**
+ * \brief A fixed-length memory block central cache pool.
+ * \tparam BlockSize specifies the memory block size
+ */
+template <std::size_t BlockSize>
+class central_cache_pool {
+
+  /// \brief The block type.
+  using block_t = block<BlockSize>;
+
+  /// \brief The central cache stack.
+  ::LIBCONCUR::intrusive_stack<block_t *> cache_;
+  ::LIBCONCUR::intrusive_stack<block_t *> aqueired_;
+
+  central_cache_pool() noexcept = default;
+
+public:
+  block_t *aqueire() noexcept {
+    auto *n = cache_.pop();
+    if (n != nullptr) {
+      aqueired_.push(n);
+      return n->value;
+    }
+    auto *blocks = new(std::nothrow) std::array<block_t, block_pool_expansion>;
+    if (blocks == nullptr) {
+      return nullptr;
+    }
+    for (std::size_t i = 0; i < block_pool_expansion - 1; ++i) {
+      (*blocks)[i].next = &(*blocks)[i + 1];
+    }
+    blocks->back().next = nullptr;
+    return blocks->data();
+  }
+
+  void release(block_t *p) noexcept {
+    if (p == nullptr) return;
+    auto *a = aqueired_.pop();
+    if (a == nullptr) {
+      a = new(std::nothrow) ::LIBCONCUR::intrusive_stack<block_t *>::node;
+      if (a == nullptr) return;
+    }
+    a->value = p;
+    cache_.push(a);
+  }
+
+  /// \brief Get the singleton instance.
+  static central_cache_pool &instance() noexcept {
+    static central_cache_pool pool;
+    return pool;
+  }
+};
+
+/**
+ * \brief Fixed-length memory block pool.
+ * \tparam BlockSize specifies the memory block size
+ */
+template <std::size_t BlockSize>
+class block_pool {
+
+  /// \brief The block type.
+  using block_t = block<BlockSize>;
+
+  /// \brief Expand the block pool when it is exhausted.
+  block_t *expand() noexcept {
+    return central_cache_pool<BlockSize>::instance().aqueire();
+  }
+
+public:
+  constexpr static std::size_t block_size = BlockSize;
+
+  block_pool() noexcept : cursor_(expand()) {}
+  ~block_pool() noexcept {
+    central_cache_pool<BlockSize>::instance().release(cursor_);
+  }
+
+  block_pool(block_pool const &) = delete;
+  block_pool& operator=(block_pool const &) = delete;
+
+  void *allocate() noexcept {
+    if (cursor_ == nullptr) {
+      cursor_ = expand();
+      if (cursor_ == nullptr) return nullptr;
+    }
+    block_t *p = cursor_;
+    cursor_ = cursor_->next;
+    return p->storage.data();
+  }
+
+  void deallocate(void *p) noexcept {
+    if (p == nullptr) return;
+    block_t *b = static_cast<block_t *>(p);
+    b->next = cursor_;
+    cursor_ = b;
+  }
+
+private:
+  block_t *cursor_;
+};
+
+LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/def.h b/include/libpmr/def.h
index ff4c753a..b724aa95 100644
--- a/include/libpmr/def.h
+++ b/include/libpmr/def.h
@@ -14,4 +14,8 @@ LIBPMR_NAMESPACE_BEG_
 
 /// \brief Constants.
 
+enum : std::size_t {
+  block_pool_expansion = 64,
+};
+
 LIBPMR_NAMESPACE_END_
diff --git a/test/pmr/test_pmr_block_pool.cpp b/test/pmr/test_pmr_block_pool.cpp
new file mode 100644
index 00000000..7e8ec867
--- /dev/null
+++ b/test/pmr/test_pmr_block_pool.cpp
@@ -0,0 +1,7 @@
+
+#include "gtest/gtest.h"
+
+#include "libpmr/block_pool.h"
+
+TEST(block_pool, construct) {
+}

From 3be10b67bcb75197d6e5595830c0d09f52bab62a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 23 Dec 2023 16:34:47 +0800
Subject: [PATCH 229/272] upd: [pmr] improve `block_pool`

---
 include/libpmr/allocator.h                  | 12 +++++
 include/libpmr/block_pool.h                 | 45 ++++++++++------
 include/libpmr/def.h                        |  3 +-
 include/libpmr/memory_resource.h            |  2 +-
 include/libpmr/synchronized_pool_resource.h | 40 +++++++++++++++
 src/libpmr/block_pool.cpp                   | 14 +++++
 src/libpmr/synchronized_pool_resource.cpp   | 11 ++++
 test/pmr/test_pmr_block_pool.cpp            | 57 ++++++++++++++++++++-
 8 files changed, 165 insertions(+), 19 deletions(-)
 create mode 100644 include/libpmr/synchronized_pool_resource.h
 create mode 100644 src/libpmr/block_pool.cpp
 create mode 100644 src/libpmr/synchronized_pool_resource.cpp

diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
index c02c8d7f..d4ebce21 100644
--- a/include/libpmr/allocator.h
+++ b/include/libpmr/allocator.h
@@ -115,6 +115,18 @@ class LIBIMP_EXPORT allocator {
   /// \brief Allocate/deallocate memory.
   void *allocate(std::size_t s, std::size_t = alignof(std::max_align_t)) const;
   void  deallocate(void *p, std::size_t s, std::size_t = alignof(std::max_align_t)) const;
+
+  /// \brief Allocates uninitialized memory and constructs an object of type T in the memory.
+  template <typename T, typename... A>
+  T *construct(A &&...args) const {
+    return ::LIBIMP::construct<T>(allocate(sizeof(T), alignof(T)), std::forward<A>(args)...);
+  }
+
+  /// \brief Calls the destructor of the object pointed to by p and deallocates the memory.
+  template <typename T>
+  void destroy(T *p) const noexcept {
+    deallocate(::LIBIMP::destroy(p), sizeof(T), alignof(T));
+  }
 };
 
 LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/block_pool.h b/include/libpmr/block_pool.h
index f38ecbb7..4f881cf1 100644
--- a/include/libpmr/block_pool.h
+++ b/include/libpmr/block_pool.h
@@ -12,13 +12,19 @@
 #include <deque>
 
 #include "libimp/byte.h"
+#include "libimp/export.h"
 #include "libconcur/intrusive_stack.h"
 
 #include "libpmr/def.h"
-#include "libpmr/memory_resource.h"
+#include "libpmr/allocator.h"
 
 LIBPMR_NAMESPACE_BEG_
 
+/// \brief Get the central cache allocator.
+/// \note The central cache allocator is used to allocate memory for the central cache pool.
+///       The underlying memory resource is a `monotonic_buffer_resource` with a fixed-size buffer.
+LIBIMP_EXPORT allocator &central_cache_allocator() noexcept;
+
 /**
  * \brief The block type.
  * \tparam BlockSize specifies the memory block size
@@ -33,45 +39,49 @@ union block {
  * \brief A fixed-length memory block central cache pool.
  * \tparam BlockSize specifies the memory block size
  */
-template <std::size_t BlockSize>
+template <typename BlockT, std::size_t BlockPoolExpansion>
 class central_cache_pool {
 
-  /// \brief The block type.
-  using block_t = block<BlockSize>;
+  /// \brief The block type, which should be a union of a pointer and a storage.
+  using block_t = BlockT;
+  /// \brief The chunk type, which is an array of blocks.
+  using chunk_t = std::array<block_t, BlockPoolExpansion>;
+  /// \brief The node type, which is used to store the block pointer.
+  using node_t = typename ::LIBCONCUR::intrusive_stack<block_t *>::node;
 
   /// \brief The central cache stack.
-  ::LIBCONCUR::intrusive_stack<block_t *> cache_;
+  ::LIBCONCUR::intrusive_stack<block_t *> cached_;
   ::LIBCONCUR::intrusive_stack<block_t *> aqueired_;
 
   central_cache_pool() noexcept = default;
 
 public:
   block_t *aqueire() noexcept {
-    auto *n = cache_.pop();
+    auto *n = cached_.pop();
     if (n != nullptr) {
       aqueired_.push(n);
       return n->value;
     }
-    auto *blocks = new(std::nothrow) std::array<block_t, block_pool_expansion>;
-    if (blocks == nullptr) {
+    auto *chunk = central_cache_allocator().construct<chunk_t>();
+    if (chunk == nullptr) {
       return nullptr;
     }
     for (std::size_t i = 0; i < block_pool_expansion - 1; ++i) {
-      (*blocks)[i].next = &(*blocks)[i + 1];
+      (*chunk)[i].next = &(*chunk)[i + 1];
     }
-    blocks->back().next = nullptr;
-    return blocks->data();
+    chunk->back().next = nullptr;
+    return chunk->data();
   }
 
   void release(block_t *p) noexcept {
     if (p == nullptr) return;
     auto *a = aqueired_.pop();
     if (a == nullptr) {
-      a = new(std::nothrow) ::LIBCONCUR::intrusive_stack<block_t *>::node;
+      a = central_cache_allocator().construct<node_t>();
       if (a == nullptr) return;
     }
     a->value = p;
-    cache_.push(a);
+    cached_.push(a);
   }
 
   /// \brief Get the singleton instance.
@@ -84,16 +94,19 @@ class central_cache_pool {
 /**
  * \brief Fixed-length memory block pool.
  * \tparam BlockSize specifies the memory block size
+ * \tparam BlockPoolExpansion specifies the default number of blocks to expand when the block pool is exhausted
  */
-template <std::size_t BlockSize>
+template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
 class block_pool {
 
   /// \brief The block type.
   using block_t = block<BlockSize>;
+  /// \brief The central cache pool type.
+  using central_cache_pool_t = central_cache_pool<block_t, BlockPoolExpansion>;
 
   /// \brief Expand the block pool when it is exhausted.
   block_t *expand() noexcept {
-    return central_cache_pool<BlockSize>::instance().aqueire();
+    return central_cache_pool_t::instance().aqueire();
   }
 
 public:
@@ -101,7 +114,7 @@ class block_pool {
 
   block_pool() noexcept : cursor_(expand()) {}
   ~block_pool() noexcept {
-    central_cache_pool<BlockSize>::instance().release(cursor_);
+    central_cache_pool_t::instance().release(cursor_);
   }
 
   block_pool(block_pool const &) = delete;
diff --git a/include/libpmr/def.h b/include/libpmr/def.h
index b724aa95..38a265a7 100644
--- a/include/libpmr/def.h
+++ b/include/libpmr/def.h
@@ -15,7 +15,8 @@ LIBPMR_NAMESPACE_BEG_
 /// \brief Constants.
 
 enum : std::size_t {
-  block_pool_expansion = 64,
+  block_pool_expansion       = 64,
+  central_cache_default_size = 1024 * 1024, ///< 1MB
 };
 
 LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/memory_resource.h b/include/libpmr/memory_resource.h
index be308532..27aa5dd7 100644
--- a/include/libpmr/memory_resource.h
+++ b/include/libpmr/memory_resource.h
@@ -49,7 +49,7 @@ using verify_memory_resource =
  */
 class LIBIMP_EXPORT new_delete_resource {
 public:
-  /// \brief Returns a pointer to a new_delete_resource.
+  /// \brief Returns a pointer to a `new_delete_resource`.
   static new_delete_resource *get() noexcept;
 
   /// \brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
diff --git a/include/libpmr/synchronized_pool_resource.h b/include/libpmr/synchronized_pool_resource.h
new file mode 100644
index 00000000..8c54bf5d
--- /dev/null
+++ b/include/libpmr/synchronized_pool_resource.h
@@ -0,0 +1,40 @@
+/**
+ * \file libpmr/synchronized_pool_resource.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief A thread-safe std::pmr::memory_resource for managing allocations in pools of different block sizes.
+ * \date 2023-12-23
+ */
+#pragma once
+
+#include <cstddef>  // std::size_t, std::max_align_t
+
+#include "libimp/export.h"
+#include "libpmr/def.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/**
+ * \class LIBIMP_EXPORT synchronized_pool_resource
+ * \brief `synchronized_pool_resource` may be accessed from multiple threads without external synchronization, 
+ *        and have thread-specific pools to reduce synchronization costs.
+ * \note Unlike the standard library implementation, `synchronized_pool_resource` automatically manages 
+ *       the block size and reclaims all allocated memory to the central heap when the thread is destroyed, 
+ *       rather than being destructed on its own.
+ * \see https://en.cppreference.com/w/cpp/memory/synchronized_pool_resource
+ */
+class LIBIMP_EXPORT synchronized_pool_resource {
+public:
+  /// \brief Returns a pointer to a `synchronized_pool_resource`.
+  static synchronized_pool_resource *get() noexcept;
+
+  /// \brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
+  /// \remark Returns nullptr if storage of the requested size and alignment cannot be obtained.
+  /// \see https://en.cppreference.com/w/cpp/memory/memory_resource/do_allocate
+  void *allocate(std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
+
+  /// \brief Deallocates the storage pointed to by p.
+  /// \see https://en.cppreference.com/w/cpp/memory/memory_resource/deallocate
+  void deallocate(void *p, std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
+};
+
+LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/block_pool.cpp b/src/libpmr/block_pool.cpp
new file mode 100644
index 00000000..47893c67
--- /dev/null
+++ b/src/libpmr/block_pool.cpp
@@ -0,0 +1,14 @@
+
+#include "libpmr/block_pool.h"
+#include "libpmr/monotonic_buffer_resource.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+allocator &central_cache_allocator() noexcept {
+  static std::array<::LIBIMP::byte, central_cache_default_size> buffer;
+  static monotonic_buffer_resource mr(buffer);
+  static allocator a(&mr);
+  return a;
+}
+
+LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/synchronized_pool_resource.cpp b/src/libpmr/synchronized_pool_resource.cpp
new file mode 100644
index 00000000..0c44d886
--- /dev/null
+++ b/src/libpmr/synchronized_pool_resource.cpp
@@ -0,0 +1,11 @@
+
+#include "libimp/log.h"
+
+#include "libpmr/synchronized_pool_resource.h"
+
+LIBPMR_NAMESPACE_BEG_
+namespace {
+
+} // namespace
+
+LIBPMR_NAMESPACE_END_
diff --git a/test/pmr/test_pmr_block_pool.cpp b/test/pmr/test_pmr_block_pool.cpp
index 7e8ec867..1271dd8f 100644
--- a/test/pmr/test_pmr_block_pool.cpp
+++ b/test/pmr/test_pmr_block_pool.cpp
@@ -1,7 +1,62 @@
 
+#include <type_traits>
+
 #include "gtest/gtest.h"
 
 #include "libpmr/block_pool.h"
 
-TEST(block_pool, construct) {
+TEST(block_pool, central_cache_allocator) {
+  auto &a = pmr::central_cache_allocator();
+  ASSERT_FALSE(nullptr == a.allocate(1));
+  ASSERT_FALSE(nullptr == a.allocate(10));
+  ASSERT_FALSE(nullptr == a.allocate(100));
+  ASSERT_FALSE(nullptr == a.allocate(1000));
+  ASSERT_FALSE(nullptr == a.allocate(10000));
+}
+
+TEST(block_pool, block) {
+  pmr::block<1> b1;
+  EXPECT_EQ(sizeof(b1), sizeof(void*));
+  pmr::block<sizeof(void*)> b2;
+  EXPECT_EQ(sizeof(b2), sizeof(void*));
+  pmr::block<sizeof(void*) + 1> b3;
+  EXPECT_EQ(sizeof(b3), sizeof(void*) * 2);
+}
+
+TEST(block_pool, central_cache_pool_ctor) {
+  ASSERT_FALSE((std::is_default_constructible<pmr::central_cache_pool<pmr::block<1>, 1>>::value));
+  ASSERT_FALSE((std::is_copy_constructible<pmr::central_cache_pool<pmr::block<1>, 1>>::value));
+  ASSERT_FALSE((std::is_move_constructible<pmr::central_cache_pool<pmr::block<1>, 1>>::value));
+  ASSERT_FALSE((std::is_copy_assignable<pmr::central_cache_pool<pmr::block<1>, 1>>::value));
+  ASSERT_FALSE((std::is_move_assignable<pmr::central_cache_pool<pmr::block<1>, 1>>::value));
+  {
+    auto &pool = pmr::central_cache_pool<pmr::block<1>, 1>::instance();
+    pmr::block<1> *b1 = pool.aqueire();
+    ASSERT_FALSE(nullptr == b1);
+    ASSERT_TRUE (nullptr == b1->next);
+    pool.release(b1);
+    pmr::block<1> *b2 = pool.aqueire();
+    EXPECT_EQ(b1, b2);
+    pmr::block<1> *b3 = pool.aqueire();
+    ASSERT_FALSE(nullptr == b3);
+    ASSERT_TRUE (nullptr == b3->next);
+    EXPECT_NE(b1, b3);
+  }
+  {
+    auto &pool = pmr::central_cache_pool<pmr::block<1>, 2>::instance();
+    pmr::block<1> *b1 = pool.aqueire();
+    ASSERT_FALSE(nullptr == b1);
+    ASSERT_FALSE(nullptr == b1->next);
+    ASSERT_TRUE (nullptr == b1->next->next);
+    pool.release(b1);
+    pmr::block<1> *b2 = pool.aqueire();
+    EXPECT_EQ(b1, b2);
+    pmr::block<1> *b3 = pool.aqueire();
+    EXPECT_NE(b1, b3);
+    pmr::block<1> *b4 = pool.aqueire();
+    ASSERT_FALSE(nullptr == b4);
+    ASSERT_FALSE(nullptr == b4->next);
+    ASSERT_TRUE (nullptr == b4->next->next);
+    EXPECT_NE(b1, b4);
+  }
 }

From c10d84a8f2640609a5d83b375f037f28ba5e6904 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 23 Dec 2023 19:16:01 +0800
Subject: [PATCH 230/272] fix ut

---
 test/pmr/test_pmr_block_pool.cpp | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/test/pmr/test_pmr_block_pool.cpp b/test/pmr/test_pmr_block_pool.cpp
index 1271dd8f..c354b440 100644
--- a/test/pmr/test_pmr_block_pool.cpp
+++ b/test/pmr/test_pmr_block_pool.cpp
@@ -1,5 +1,6 @@
 
 #include <type_traits>
+#include <algorithm>
 
 #include "gtest/gtest.h"
 
@@ -16,11 +17,11 @@ TEST(block_pool, central_cache_allocator) {
 
 TEST(block_pool, block) {
   pmr::block<1> b1;
-  EXPECT_EQ(sizeof(b1), sizeof(void*));
-  pmr::block<sizeof(void*)> b2;
-  EXPECT_EQ(sizeof(b2), sizeof(void*));
-  pmr::block<sizeof(void*) + 1> b3;
-  EXPECT_EQ(sizeof(b3), sizeof(void*) * 2);
+  EXPECT_EQ(sizeof(b1), (std::max)(alignof(std::max_align_t), sizeof(void *)));
+  pmr::block<sizeof(void *)> b2;
+  EXPECT_EQ(sizeof(b2), (std::max)(alignof(std::max_align_t), sizeof(void *)));
+  pmr::block<sizeof(void *) + 1> b3;
+  EXPECT_EQ(sizeof(b3), (std::max)(alignof(std::max_align_t), sizeof(void *) * 2));
 }
 
 TEST(block_pool, central_cache_pool_ctor) {

From d995c693f3177f0c68cf0ac9f56e278861cd5125 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 24 Dec 2023 12:54:43 +0800
Subject: [PATCH 231/272] Add unit tests for block_pool

---
 include/libpmr/synchronized_pool_resource.h |  2 +-
 test/pmr/test_pmr_block_pool.cpp            | 26 +++++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/include/libpmr/synchronized_pool_resource.h b/include/libpmr/synchronized_pool_resource.h
index 8c54bf5d..578d494f 100644
--- a/include/libpmr/synchronized_pool_resource.h
+++ b/include/libpmr/synchronized_pool_resource.h
@@ -18,7 +18,7 @@ LIBPMR_NAMESPACE_BEG_
  * \brief `synchronized_pool_resource` may be accessed from multiple threads without external synchronization, 
  *        and have thread-specific pools to reduce synchronization costs.
  * \note Unlike the standard library implementation, `synchronized_pool_resource` automatically manages 
- *       the block size and reclaims all allocated memory to the central heap when the thread is destroyed, 
+ *       the block size and reclaims all deallocated memory to the central heap when the thread is destroyed, 
  *       rather than being destructed on its own.
  * \see https://en.cppreference.com/w/cpp/memory/synchronized_pool_resource
  */
diff --git a/test/pmr/test_pmr_block_pool.cpp b/test/pmr/test_pmr_block_pool.cpp
index c354b440..5f666842 100644
--- a/test/pmr/test_pmr_block_pool.cpp
+++ b/test/pmr/test_pmr_block_pool.cpp
@@ -61,3 +61,29 @@ TEST(block_pool, central_cache_pool_ctor) {
     EXPECT_NE(b1, b4);
   }
 }
+
+TEST(block_pool, ctor) {
+  ASSERT_TRUE ((std::is_default_constructible<pmr::block_pool<1, 1>>::value));
+  ASSERT_FALSE((std::is_copy_constructible<pmr::block_pool<1, 1>>::value));
+  ASSERT_FALSE((std::is_move_constructible<pmr::block_pool<1, 1>>::value));
+  ASSERT_FALSE((std::is_copy_assignable<pmr::block_pool<1, 1>>::value));
+  ASSERT_FALSE((std::is_move_assignable<pmr::block_pool<1, 1>>::value));
+}
+
+TEST(block_pool, allocate) {
+  std::vector<void *> v;
+  pmr::block_pool<1, 1> pool;
+  for (int i = 0; i < 100; ++i) {
+    v.push_back(pool.allocate());
+  }
+  for (void *p: v) {
+    ASSERT_FALSE(nullptr == p);
+    pool.deallocate(p);
+  }
+  for (int i = 0; i < 100; ++i) {
+    ASSERT_EQ(v[v.size() - i - 1], pool.allocate());
+  }
+  for (void *p: v) {
+    pool.deallocate(p);
+  }
+}

From fc60c75ac4e3bb522b1f649d5d30aedf9637068b Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 1 Jan 2024 18:04:53 +0800
Subject: [PATCH 232/272] [TBD] add global object creation function

---
 include/libpmr/new.h                      | 86 +++++++++++++++++++++++
 src/libpmr/memory_resource.cpp            | 18 +----
 src/libpmr/synchronized_pool_resource.cpp | 28 ++++++++
 src/libpmr/verify_args.h                  | 22 ++++++
 test/pmr/test_pmr_new.cpp                 |  5 ++
 5 files changed, 143 insertions(+), 16 deletions(-)
 create mode 100644 include/libpmr/new.h
 create mode 100644 src/libpmr/verify_args.h
 create mode 100644 test/pmr/test_pmr_new.cpp

diff --git a/include/libpmr/new.h b/include/libpmr/new.h
new file mode 100644
index 00000000..61ac1f7d
--- /dev/null
+++ b/include/libpmr/new.h
@@ -0,0 +1,86 @@
+/**
+ * \file libpmr/new.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Global object creation function.
+ * \date 2024-01-01
+ */
+#pragma once
+
+#include <cstddef>
+
+#include "libimp/aligned.h"
+#include "libimp/uninitialized.h"
+
+#include "libpmr/def.h"
+#include "libpmr/block_pool.h"
+#include "libpmr/memory_resource.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+constexpr inline std::size_t regular_level(std::size_t s) noexcept {
+  if (s <= 128  ) return 0;
+  if (s <= 1024 ) return 1;
+  if (s <= 8192 ) return 2;
+  if (s <= 65536) return 3;
+  return 4;
+}
+
+constexpr inline std::size_t regular_sizeof(std::size_t s) noexcept {
+  switch (regular_level(s)) {
+    case 0 : return ::LIBIMP::round_up<std::size_t>(s, 8);
+    case 1 : return ::LIBIMP::round_up<std::size_t>(s, 128);
+    case 2 : return ::LIBIMP::round_up<std::size_t>(s, 1024);
+    case 3 : return ::LIBIMP::round_up<std::size_t>(s, 8192);
+    default: return 0;
+  }
+}
+
+template <typename T>
+constexpr inline std::size_t regular_sizeof() noexcept {
+  return regular_sizeof(sizeof(T));
+}
+
+template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
+class block_pool_resource : public block_pool<BlockSize, BlockPoolExpansion> {
+public:
+  static block_pool_resource *get() noexcept {
+    thread_local block_pool_resource instance;
+    return &instance;
+  }
+  void *allocate(std::size_t /*bytes*/, std::size_t /*alignment*/ = alignof(std::max_align_t)) noexcept {
+    return block_pool<BlockSize, BlockPoolExpansion>::allocate();
+  }
+  void deallocate(void *p, std::size_t /*bytes*/, std::size_t /*alignment*/ = alignof(std::max_align_t)) noexcept {
+    block_pool<BlockSize, BlockPoolExpansion>::deallocate(p);
+  }
+};
+
+template <std::size_t N, std::size_t L = regular_level(N)>
+class regular_resource : public new_delete_resource {};
+
+template <std::size_t N>
+class regular_resource<N, 0> : public block_pool_resource<N, 512> {};
+
+template <std::size_t N>
+class regular_resource<N, 1> : public block_pool_resource<N, 256> {};
+
+template <std::size_t N>
+class regular_resource<N, 2> : public block_pool_resource<N, 128> {};
+
+template <std::size_t N>
+class regular_resource<N, 3> : public block_pool_resource<N, 64> {};
+
+template <typename T, typename... A>
+T *new_(A &&... args) noexcept {
+  auto *mem_res = regular_resource<regular_sizeof<T>()>::get();
+  return ::LIBIMP::construct<T>(mem_res->allocate(sizeof(T), alignof(T)), std::forward<A>(args)...);
+}
+
+template <typename T>
+void delete_(T *p) noexcept {
+  if (p == nullptr) return;
+  auto *mem_res = regular_resource<regular_sizeof<T>()>::get();
+  mem_res->deallocate(::LIBIMP::destroy(p), sizeof(T), alignof(T));
+}
+
+LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
index 7231154f..1ac95ebe 100644
--- a/src/libpmr/memory_resource.cpp
+++ b/src/libpmr/memory_resource.cpp
@@ -8,23 +8,9 @@
 
 #include "libpmr/memory_resource.h"
 
-LIBPMR_NAMESPACE_BEG_
-namespace {
-
-/**
- * \brief Check that bytes is not 0 and that the alignment is a power of two.
- */
-bool verify_args(std::size_t bytes, std::size_t alignment) noexcept {
-  if (bytes == 0) {
-    return false;
-  }
-  if ((alignment == 0) || (alignment & (alignment - 1)) != 0) {
-    return false;
-  }
-  return true;
-}
+#include "verify_args.h"
 
-} // namespace
+LIBPMR_NAMESPACE_BEG_
 
 /**
  * \brief Returns a pointer to a new_delete_resource.
diff --git a/src/libpmr/synchronized_pool_resource.cpp b/src/libpmr/synchronized_pool_resource.cpp
index 0c44d886..f14c9966 100644
--- a/src/libpmr/synchronized_pool_resource.cpp
+++ b/src/libpmr/synchronized_pool_resource.cpp
@@ -2,10 +2,38 @@
 #include "libimp/log.h"
 
 #include "libpmr/synchronized_pool_resource.h"
+#include "libpmr/block_pool.h"
+
+#include "verify_args.h"
 
 LIBPMR_NAMESPACE_BEG_
 namespace {
 
 } // namespace
 
+synchronized_pool_resource *synchronized_pool_resource::get() noexcept {
+  static synchronized_pool_resource mem_res;
+  return &mem_res;
+}
+
+void *synchronized_pool_resource::allocate(std::size_t bytes, std::size_t alignment) noexcept {
+  LIBIMP_LOG_();
+  if (!verify_args(bytes, alignment) || (alignment > alignof(std::max_align_t))) {
+    log.error("invalid bytes = ", bytes, ", alignment = ", alignment);
+    return nullptr;
+  }
+  return nullptr;
+}
+
+void synchronized_pool_resource::deallocate(void *p, std::size_t bytes, std::size_t alignment) noexcept {
+  LIBIMP_LOG_();
+  if (p == nullptr) {
+    return;
+  }
+  if (!verify_args(bytes, alignment) || (alignment > alignof(std::max_align_t))) {
+    log.error("invalid bytes = ", bytes, ", alignment = ", alignment);
+    return;
+  }
+}
+
 LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/verify_args.h b/src/libpmr/verify_args.h
new file mode 100644
index 00000000..fceaccf5
--- /dev/null
+++ b/src/libpmr/verify_args.h
@@ -0,0 +1,22 @@
+#pragma once
+
+#include <cstddef>
+
+#include "libpmr/def.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/**
+ * \brief Check that bytes is not 0 and that the alignment is a power of two.
+ */
+inline bool verify_args(std::size_t bytes, std::size_t alignment) noexcept {
+  if (bytes == 0) {
+    return false;
+  }
+  if ((alignment == 0) || (alignment & (alignment - 1)) != 0) {
+    return false;
+  }
+  return true;
+}
+
+LIBPMR_NAMESPACE_END_
diff --git a/test/pmr/test_pmr_new.cpp b/test/pmr/test_pmr_new.cpp
new file mode 100644
index 00000000..96d59e74
--- /dev/null
+++ b/test/pmr/test_pmr_new.cpp
@@ -0,0 +1,5 @@
+
+#include "gtest/gtest.h"
+
+#include "libpmr/new.h"
+

From 2f79716b1cfbfc7251fc81daa87a5ae54e8c6f74 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 6 Jan 2024 17:34:59 +0800
Subject: [PATCH 233/272] Update libpmr code

---
 include/libpmr/block_pool.h | 105 +++++++++++++++++++++++++++++-
 include/libpmr/def.h        |   6 +-
 include/libpmr/new.h        | 123 ++++++++++++++++++++++++++++++++----
 test/pmr/test_pmr_new.cpp   |  92 +++++++++++++++++++++++++++
 4 files changed, 311 insertions(+), 15 deletions(-)

diff --git a/include/libpmr/block_pool.h b/include/libpmr/block_pool.h
index 4f881cf1..7649634b 100644
--- a/include/libpmr/block_pool.h
+++ b/include/libpmr/block_pool.h
@@ -10,6 +10,7 @@
 #include <new>
 #include <array>
 #include <deque>
+#include <utility>
 
 #include "libimp/byte.h"
 #include "libimp/export.h"
@@ -37,7 +38,7 @@ union block {
 
 /**
  * \brief A fixed-length memory block central cache pool.
- * \tparam BlockSize specifies the memory block size
+ * \tparam BlockT specifies the memory block type
  */
 template <typename BlockT, std::size_t BlockPoolExpansion>
 class central_cache_pool {
@@ -66,7 +67,7 @@ class central_cache_pool {
     if (chunk == nullptr) {
       return nullptr;
     }
-    for (std::size_t i = 0; i < block_pool_expansion - 1; ++i) {
+    for (std::size_t i = 0; i < BlockPoolExpansion - 1; ++i) {
       (*chunk)[i].next = &(*chunk)[i + 1];
     }
     chunk->back().next = nullptr;
@@ -91,12 +92,103 @@ class central_cache_pool {
   }
 };
 
+/// \brief A fixed-length memory block central cache pool with no default expansion size.
+template <typename BlockT>
+class central_cache_pool<BlockT, 0> {
+
+  /// \brief The block type, which should be a union of a pointer and a storage.
+  using block_t = BlockT;
+  /// \brief The node type, which is used to store the block pointer.
+  using node_t = typename ::LIBCONCUR::intrusive_stack<block_t *>::node;
+
+  /// \brief The central cache stack.
+  ::LIBCONCUR::intrusive_stack<block_t *> cached_;
+  ::LIBCONCUR::intrusive_stack<block_t *> aqueired_;
+
+  central_cache_pool() noexcept = default;
+
+public:
+  block_t *aqueire() noexcept {
+    auto *n = cached_.pop();
+    if (n != nullptr) {
+      aqueired_.push(n);
+      return n->value;
+    }
+    // For pools with no default expansion size, 
+    // the central cache pool is only buffered, not allocated.
+    return nullptr;
+  }
+
+  void release(block_t *p) noexcept {
+    if (p == nullptr) return;
+    auto *a = aqueired_.pop();
+    if (a == nullptr) {
+      a = central_cache_allocator().construct<node_t>();
+      if (a == nullptr) return;
+    }
+    a->value = p;
+    cached_.push(a);
+  }
+
+  /// \brief Get the singleton instance.
+  static central_cache_pool &instance() noexcept {
+    static central_cache_pool pool;
+    return pool;
+  }
+};
+
 /**
  * \brief Fixed-length memory block pool.
  * \tparam BlockSize specifies the memory block size
  * \tparam BlockPoolExpansion specifies the default number of blocks to expand when the block pool is exhausted
  */
 template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
+class block_pool;
+
+/// \brief General-purpose block pool for any size of memory block.
+/// \note This block pool can only be used to deallocate a group of memory blocks of unknown but consistent size, 
+///       and cannot be used for memory block allocation.
+template <>
+class block_pool<0, 0> {
+
+  template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
+  friend class block_pool;
+
+  /// \brief The block type.
+  struct block_t {
+    block_t *next;
+  };
+
+  /// \brief The central cache pool type.
+  using central_cache_pool_t = central_cache_pool<block_t, 0>;
+
+public:
+  constexpr static std::size_t block_size = 0;
+
+  block_pool() noexcept : cursor_(central_cache_pool_t::instance().aqueire()) {}
+  ~block_pool() noexcept {
+    central_cache_pool_t::instance().release(cursor_);
+  }
+
+  block_pool(block_pool const &) = delete;
+  block_pool& operator=(block_pool const &) = delete;
+
+  block_pool(block_pool &&rhs) noexcept : cursor_(std::exchange(rhs.cursor_, nullptr)) {}
+  block_pool &operator=(block_pool &&) noexcept = delete;
+
+  void deallocate(void *p) noexcept {
+    if (p == nullptr) return;
+    block_t *b = static_cast<block_t *>(p);
+    b->next = cursor_;
+    cursor_ = b;
+  }
+
+private:
+  block_t *cursor_;
+};
+
+/// \brief A block pool for a block of memory of a specific size.
+template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
 class block_pool {
 
   /// \brief The block type.
@@ -120,6 +212,15 @@ class block_pool {
   block_pool(block_pool const &) = delete;
   block_pool& operator=(block_pool const &) = delete;
 
+  block_pool(block_pool &&rhs) noexcept
+    : cursor_(std::exchange(rhs.cursor_, nullptr)) {}
+  block_pool &operator=(block_pool &&) noexcept = delete;
+
+  /// \brief Used to take all memory blocks from within a general-purpose block pool.
+  /// \note Of course, the actual memory blocks they manage must be the same size.
+  block_pool(block_pool<0, 0> &&rhs) noexcept
+    : cursor_(reinterpret_cast<block_t *>(std::exchange(rhs.cursor_, nullptr))) {}
+
   void *allocate() noexcept {
     if (cursor_ == nullptr) {
       cursor_ = expand();
diff --git a/include/libpmr/def.h b/include/libpmr/def.h
index 38a265a7..3b8e1ddb 100644
--- a/include/libpmr/def.h
+++ b/include/libpmr/def.h
@@ -6,6 +6,10 @@
  */
 #pragma once
 
+#include <cstddef>
+
+#include "libimp/aligned.h"
+
 #define LIBPMR                pmr
 #define LIBPMR_NAMESPACE_BEG_ namespace LIBPMR {
 #define LIBPMR_NAMESPACE_END_ }
@@ -15,8 +19,8 @@ LIBPMR_NAMESPACE_BEG_
 /// \brief Constants.
 
 enum : std::size_t {
-  block_pool_expansion       = 64,
   central_cache_default_size = 1024 * 1024, ///< 1MB
+  regular_head_size          = ::LIBIMP::round_up(sizeof(std::size_t), alignof(std::max_align_t)),
 };
 
 LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/new.h b/include/libpmr/new.h
index 61ac1f7d..2ef15c87 100644
--- a/include/libpmr/new.h
+++ b/include/libpmr/new.h
@@ -7,9 +7,13 @@
 #pragma once
 
 #include <cstddef>
+#include <unordered_map>
+#include <algorithm>
 
 #include "libimp/aligned.h"
 #include "libimp/uninitialized.h"
+#include "libimp/byte.h"
+#include "libimp/detect_plat.h"
 
 #include "libpmr/def.h"
 #include "libpmr/block_pool.h"
@@ -27,34 +31,126 @@ constexpr inline std::size_t regular_level(std::size_t s) noexcept {
 
 constexpr inline std::size_t regular_sizeof(std::size_t s) noexcept {
   switch (regular_level(s)) {
-    case 0 : return ::LIBIMP::round_up<std::size_t>(s, 8);
+    case 0 : return std::max<std::size_t>(::LIBIMP::round_up<std::size_t>(s, 8), regular_head_size);
     case 1 : return ::LIBIMP::round_up<std::size_t>(s, 128);
     case 2 : return ::LIBIMP::round_up<std::size_t>(s, 1024);
     case 3 : return ::LIBIMP::round_up<std::size_t>(s, 8192);
-    default: return 0;
+    default: return (std::numeric_limits<std::size_t>::max)();
   }
 }
 
 template <typename T>
 constexpr inline std::size_t regular_sizeof() noexcept {
-  return regular_sizeof(sizeof(T));
+  return regular_sizeof(regular_head_size + sizeof(T));
+}
+
+class block_pool_like {
+ public:
+  virtual ~block_pool_like() noexcept = default;
+  virtual void *allocate() noexcept = 0;
+  virtual void deallocate(void *p) noexcept = 0;
+};
+
+inline std::unordered_map<std::size_t, block_pool_like *> &get_block_pool_map() noexcept {
+  thread_local std::unordered_map<std::size_t, block_pool_like *> instances;
+  return instances;
 }
 
 template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
-class block_pool_resource : public block_pool<BlockSize, BlockPoolExpansion> {
+class block_pool_resource;
+
+template <>
+class block_pool_resource<0, 0> : public block_pool<0, 0>
+                                , public block_pool_like {
+
+  void *allocate() noexcept override {
+    return nullptr;
+  }
+
 public:
-  static block_pool_resource *get() noexcept {
-    thread_local block_pool_resource instance;
-    return &instance;
+  void deallocate(void *p) noexcept override {
+    block_pool<0, 0>::deallocate(p);
+  }
+};
+
+template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
+class block_pool_resource : public block_pool<BlockSize, BlockPoolExpansion>
+                          , public block_pool_like {
+
+  using base_t = block_pool<BlockSize, BlockPoolExpansion>;
+
+  void *allocate() noexcept override {
+    return base_t::allocate();
   }
+
+  void deallocate(void *p) noexcept override {
+    base_t::deallocate(p);
+  }
+
+public:
+  static block_pool_resource *get() noexcept;
+
+  using base_t::base_t;
+
   void *allocate(std::size_t /*bytes*/, std::size_t /*alignment*/ = alignof(std::max_align_t)) noexcept {
-    return block_pool<BlockSize, BlockPoolExpansion>::allocate();
+    void *p = base_t::allocate();
+    p = ::LIBIMP::construct<std::size_t>(p, BlockSize);
+    return reinterpret_cast<::LIBIMP::byte *>(p) + regular_head_size;
   }
+
   void deallocate(void *p, std::size_t /*bytes*/, std::size_t /*alignment*/ = alignof(std::max_align_t)) noexcept {
-    block_pool<BlockSize, BlockPoolExpansion>::deallocate(p);
+    p = reinterpret_cast<::LIBIMP::byte *>(p) - regular_head_size;
+    auto r_size = *static_cast<std::size_t *>(p);
+    if (r_size <= BlockSize) {
+      base_t::deallocate(p);
+      return;
+    }
+    auto &map = get_block_pool_map();
+    auto it = map.find(r_size);
+    if ((it == map.end()) || (it->second == nullptr)) LIBIMP_TRY {
+      // If the corresponding memory resource cannot be found, 
+      // create a temporary general-purpose block pool to deallocate memory.
+      it = map.emplace(r_size, new block_pool_resource<0, 0>).first;
+    } LIBIMP_CATCH(...) {
+      // If the memory resource cannot be created, 
+      // store the pointer directly to avoid leakage.
+      base_t::deallocate(p);
+      return;
+    }
+    it->second->deallocate(p);
   }
 };
 
+template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
+auto block_pool_resource<BlockSize, BlockPoolExpansion>::get() noexcept
+  -> block_pool_resource<BlockSize, BlockPoolExpansion> * {
+  auto &map = get_block_pool_map();
+  thread_local block_pool_resource *pi = nullptr;
+  if (pi != nullptr) {
+    return pi;
+  }
+  auto it = map.find(BlockSize);
+  if ((it != map.end()) && (it->second != nullptr)) {
+    auto *bp = static_cast <block_pool<0, 0> *>(
+               dynamic_cast<block_pool_resource<0, 0> *>(it->second));
+    if (bp == nullptr) {
+      return nullptr;
+    }
+    thread_local block_pool_resource instance(std::move(*bp));
+    delete static_cast<block_pool_resource<0, 0> *>(bp);
+    pi = &instance;
+  } else {
+    thread_local block_pool_resource instance;
+    pi = &instance;
+  }
+  LIBIMP_TRY {
+    map.emplace(BlockSize, pi);
+  } LIBIMP_CATCH(...) {
+    return nullptr;
+  }
+  return pi;
+}
+
 template <std::size_t N, std::size_t L = regular_level(N)>
 class regular_resource : public new_delete_resource {};
 
@@ -71,16 +167,19 @@ template <std::size_t N>
 class regular_resource<N, 3> : public block_pool_resource<N, 64> {};
 
 template <typename T, typename... A>
-T *new_(A &&... args) noexcept {
+T *new$(A &&... args) noexcept {
   auto *mem_res = regular_resource<regular_sizeof<T>()>::get();
+  if (mem_res == nullptr) return nullptr;
   return ::LIBIMP::construct<T>(mem_res->allocate(sizeof(T), alignof(T)), std::forward<A>(args)...);
 }
 
 template <typename T>
-void delete_(T *p) noexcept {
+void delete$(T *p) noexcept {
   if (p == nullptr) return;
+  ::LIBIMP::destroy(p);
   auto *mem_res = regular_resource<regular_sizeof<T>()>::get();
-  mem_res->deallocate(::LIBIMP::destroy(p), sizeof(T), alignof(T));
+  if (mem_res == nullptr) return;
+  mem_res->deallocate(p, sizeof(T), alignof(T));
 }
 
 LIBPMR_NAMESPACE_END_
diff --git a/test/pmr/test_pmr_new.cpp b/test/pmr/test_pmr_new.cpp
index 96d59e74..efa11823 100644
--- a/test/pmr/test_pmr_new.cpp
+++ b/test/pmr/test_pmr_new.cpp
@@ -1,5 +1,97 @@
 
+#include <limits>
+#include <array>
+#include <cstring>
+#include <cstddef>
+
 #include "gtest/gtest.h"
 
 #include "libpmr/new.h"
 
+TEST(pmr_new, regular_sizeof) {
+  ASSERT_EQ(pmr::regular_sizeof<std::int8_t >(), pmr::regular_head_size + 8);
+  ASSERT_EQ(pmr::regular_sizeof<std::int16_t>(), pmr::regular_head_size + 8);
+  ASSERT_EQ(pmr::regular_sizeof<std::int32_t>(), pmr::regular_head_size + 8);
+  ASSERT_EQ(pmr::regular_sizeof<std::int64_t>(), pmr::regular_head_size + 8);
+
+  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 10    >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 10   , 8));
+  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 100   >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 100  , 8));
+  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 1000  >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 1000 , 128));
+  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 10000 >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 10000, 8192));
+  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 100000>>()), (std::numeric_limits<std::size_t>::max)());
+}
+
+TEST(pmr_new, new$) {
+  auto p = pmr::new$<int>();
+  ASSERT_NE(p, nullptr);
+  *p = -1;
+  ASSERT_EQ(*p, -1);
+  pmr::delete$(p);
+}
+
+TEST(pmr_new, new$value) {
+  auto p = pmr::new$<int>((std::numeric_limits<int>::max)());
+  ASSERT_NE(p, nullptr);
+  ASSERT_EQ(*p, (std::numeric_limits<int>::max)());
+  pmr::delete$(p);
+}
+
+namespace {
+
+template <std::size_t Pts, std::size_t N>
+void test_new$array() {
+  std::array<void *, Pts> pts;
+  using T = std::array<char, N>;
+  for (int i = 0; i < pts.size(); ++i) {
+    auto p = pmr::new$<T>();
+    pts[i] = p;
+    std::memset(p, i, sizeof(T));
+  }
+  for (int i = 0; i < pts.size(); ++i) {
+    T tmp;
+    std::memset(&tmp, i, sizeof(T));
+    ASSERT_EQ(std::memcmp(pts[i], &tmp, sizeof(T)), 0);
+    pmr::delete$(static_cast<T *>(pts[i]));
+  }
+}
+
+} // namespace
+
+TEST(pmr_new, new$array) {
+  test_new$array<1000, 10>();
+  test_new$array<1000, 100>();
+  test_new$array<1000, 1000>();
+  test_new$array<1000, 10000>();
+  test_new$array<1000, 100000>();
+  // test_new$array<1000, 1000000>();
+}
+
+namespace {
+
+class Base {
+public:
+  virtual ~Base() = default;
+  virtual int get() const = 0;
+};
+
+class Derived : public Base {
+public:
+  Derived(int value) : value_(value) {}
+  int get() const override { return value_; }
+
+private:
+  int value_;
+};
+
+} // namespace
+
+TEST(pmr_new, delete$poly) {
+  Base *p = pmr::new$<Derived>(-1);
+  ASSERT_NE(p, nullptr);
+  ASSERT_EQ(p->get(), -1);
+  pmr::delete$(p);
+
+  ASSERT_EQ(p, pmr::new$<Derived>((std::numeric_limits<int>::max)()));
+  ASSERT_EQ(p->get(), (std::numeric_limits<int>::max)());
+  pmr::delete$(p);
+}

From 397e25a6abe38b0d6f7b29135f3f6aef136860a4 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 6 Jan 2024 17:53:57 +0800
Subject: [PATCH 234/272] Refactor test cases for pmr_memory_resource, pmr_new,
 pmr_allocator, pmr_block_pool, and pmr_monotonic_buffer_resource

---
 test/pmr/test_pmr_allocator.cpp               | 12 +++++------
 test/pmr/test_pmr_block_pool.cpp              | 12 +++++------
 test/pmr/test_pmr_memory_resource.cpp         |  4 ++--
 .../test_pmr_monotonic_buffer_resource.cpp    | 12 +++++------
 test/pmr/test_pmr_new.cpp                     | 21 ++++++++++++++++++-
 test/pmr/test_pmr_small_storage.cpp           | 18 ++++++++--------
 6 files changed, 49 insertions(+), 30 deletions(-)

diff --git a/test/pmr/test_pmr_allocator.cpp b/test/pmr/test_pmr_allocator.cpp
index 8173c822..f55a2646 100644
--- a/test/pmr/test_pmr_allocator.cpp
+++ b/test/pmr/test_pmr_allocator.cpp
@@ -6,12 +6,12 @@
 
 #include "libpmr/allocator.h"
 
-TEST(allocator, construct) {
+TEST(pmr_allocator, construct) {
   pmr::allocator alc;
   SUCCEED();
 }
 
-TEST(allocator, construct_value_initialization) {
+TEST(pmr_allocator, construct_value_initialization) {
   pmr::allocator alc{};
   auto p = alc.allocate(128);
   EXPECT_NE(p, nullptr);
@@ -32,7 +32,7 @@ class dummy_resource {
 
 } // namespace
 
-TEST(allocator, construct_copy_move) {
+TEST(pmr_allocator, construct_copy_move) {
   pmr::new_delete_resource mem_res;
   dummy_resource dummy_res;
   pmr::allocator alc1{&mem_res}, alc2{&dummy_res};
@@ -54,7 +54,7 @@ TEST(allocator, construct_copy_move) {
   ASSERT_NO_THROW(alc5.deallocate(p, 128));
 }
 
-TEST(allocator, swap) {
+TEST(pmr_allocator, swap) {
   pmr::new_delete_resource mem_res;
   dummy_resource dummy_res;
   pmr::allocator alc1{&mem_res}, alc2{&dummy_res};
@@ -65,7 +65,7 @@ TEST(allocator, swap) {
   ASSERT_EQ(alc1.allocate(128), nullptr);
 }
 
-TEST(allocator, invalid_alloc_free) {
+TEST(pmr_allocator, invalid_alloc_free) {
   pmr::allocator alc1;
   EXPECT_EQ(alc1.allocate(0), nullptr);
   EXPECT_NO_THROW(alc1.deallocate(nullptr, 128));
@@ -73,6 +73,6 @@ TEST(allocator, invalid_alloc_free) {
   EXPECT_NO_THROW(alc1.deallocate(&alc1, 0));
 }
 
-TEST(allocator, sizeof) {
+TEST(pmr_allocator, sizeof) {
   EXPECT_EQ(sizeof(pmr::allocator), sizeof(void *) * 2);
 }
diff --git a/test/pmr/test_pmr_block_pool.cpp b/test/pmr/test_pmr_block_pool.cpp
index 5f666842..f98f89fd 100644
--- a/test/pmr/test_pmr_block_pool.cpp
+++ b/test/pmr/test_pmr_block_pool.cpp
@@ -6,7 +6,7 @@
 
 #include "libpmr/block_pool.h"
 
-TEST(block_pool, central_cache_allocator) {
+TEST(pmr_block_pool, central_cache_allocator) {
   auto &a = pmr::central_cache_allocator();
   ASSERT_FALSE(nullptr == a.allocate(1));
   ASSERT_FALSE(nullptr == a.allocate(10));
@@ -15,7 +15,7 @@ TEST(block_pool, central_cache_allocator) {
   ASSERT_FALSE(nullptr == a.allocate(10000));
 }
 
-TEST(block_pool, block) {
+TEST(pmr_block_pool, block) {
   pmr::block<1> b1;
   EXPECT_EQ(sizeof(b1), (std::max)(alignof(std::max_align_t), sizeof(void *)));
   pmr::block<sizeof(void *)> b2;
@@ -24,7 +24,7 @@ TEST(block_pool, block) {
   EXPECT_EQ(sizeof(b3), (std::max)(alignof(std::max_align_t), sizeof(void *) * 2));
 }
 
-TEST(block_pool, central_cache_pool_ctor) {
+TEST(pmr_block_pool, central_cache_pool_ctor) {
   ASSERT_FALSE((std::is_default_constructible<pmr::central_cache_pool<pmr::block<1>, 1>>::value));
   ASSERT_FALSE((std::is_copy_constructible<pmr::central_cache_pool<pmr::block<1>, 1>>::value));
   ASSERT_FALSE((std::is_move_constructible<pmr::central_cache_pool<pmr::block<1>, 1>>::value));
@@ -62,15 +62,15 @@ TEST(block_pool, central_cache_pool_ctor) {
   }
 }
 
-TEST(block_pool, ctor) {
+TEST(pmr_block_pool, ctor) {
   ASSERT_TRUE ((std::is_default_constructible<pmr::block_pool<1, 1>>::value));
   ASSERT_FALSE((std::is_copy_constructible<pmr::block_pool<1, 1>>::value));
-  ASSERT_FALSE((std::is_move_constructible<pmr::block_pool<1, 1>>::value));
+  ASSERT_TRUE ((std::is_move_constructible<pmr::block_pool<1, 1>>::value));
   ASSERT_FALSE((std::is_copy_assignable<pmr::block_pool<1, 1>>::value));
   ASSERT_FALSE((std::is_move_assignable<pmr::block_pool<1, 1>>::value));
 }
 
-TEST(block_pool, allocate) {
+TEST(pmr_block_pool, allocate) {
   std::vector<void *> v;
   pmr::block_pool<1, 1> pool;
   for (int i = 0; i < 100; ++i) {
diff --git a/test/pmr/test_pmr_memory_resource.cpp b/test/pmr/test_pmr_memory_resource.cpp
index b624135b..e322c320 100644
--- a/test/pmr/test_pmr_memory_resource.cpp
+++ b/test/pmr/test_pmr_memory_resource.cpp
@@ -24,7 +24,7 @@ void *test_mr(T &&mr, std::size_t bytes, std::size_t alignment) {
 
 } // namespace
 
-TEST(memory_resource, traits) {
+TEST(pmr_memory_resource, traits) {
   EXPECT_FALSE(pmr::has_allocate<void>::value);
   EXPECT_FALSE(pmr::has_allocate<int>::value);
   EXPECT_FALSE(pmr::has_allocate<std::vector<int>>::value);
@@ -44,7 +44,7 @@ TEST(memory_resource, traits) {
 #endif
 }
 
-TEST(memory_resource, new_delete_resource) {
+TEST(pmr_memory_resource, new_delete_resource) {
   pmr::new_delete_resource mem_res;
 
   EXPECT_EQ(test_mr(mem_res, 0, 0), nullptr);
diff --git a/test/pmr/test_pmr_monotonic_buffer_resource.cpp b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
index a4fe77aa..67031212 100644
--- a/test/pmr/test_pmr_monotonic_buffer_resource.cpp
+++ b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
@@ -7,7 +7,7 @@
 
 #include "libpmr/monotonic_buffer_resource.h"
 
-TEST(monotonic_buffer_resource, construct) {
+TEST(pmr_monotonic_buffer_resource, construct) {
   { pmr::monotonic_buffer_resource tmp; }
   pmr::monotonic_buffer_resource{};
   pmr::monotonic_buffer_resource{pmr::allocator{}};
@@ -18,14 +18,14 @@ TEST(monotonic_buffer_resource, construct) {
   SUCCEED();
 }
 
-TEST(monotonic_buffer_resource, no_copy) {
+TEST(pmr_monotonic_buffer_resource, no_copy) {
   EXPECT_FALSE(std::is_copy_constructible<pmr::monotonic_buffer_resource>::value);
   EXPECT_FALSE(std::is_copy_assignable<pmr::monotonic_buffer_resource>::value);
   EXPECT_FALSE(std::is_move_constructible<pmr::monotonic_buffer_resource>::value);
   EXPECT_FALSE(std::is_move_assignable<pmr::monotonic_buffer_resource>::value);
 }
 
-TEST(monotonic_buffer_resource, upstream_resource) {
+TEST(pmr_monotonic_buffer_resource, upstream_resource) {
   struct dummy_allocator {
     bool allocated = false;
     void *allocate(std::size_t, std::size_t) noexcept { allocated = true; return nullptr; }
@@ -52,7 +52,7 @@ struct dummy_allocator {
 
 } // namespace
 
-TEST(monotonic_buffer_resource, allocate) {
+TEST(pmr_monotonic_buffer_resource, allocate) {
   dummy_allocator dummy;
   {
     pmr::monotonic_buffer_resource tmp{&dummy};
@@ -76,7 +76,7 @@ TEST(monotonic_buffer_resource, allocate) {
   ASSERT_EQ(dummy.allocated, 0);
 }
 
-TEST(monotonic_buffer_resource, allocate_by_buffer) {
+TEST(pmr_monotonic_buffer_resource, allocate_by_buffer) {
   dummy_allocator dummy;
   std::array<imp::byte, 4096> buffer;
   {
@@ -95,7 +95,7 @@ TEST(monotonic_buffer_resource, allocate_by_buffer) {
   ASSERT_EQ(dummy.allocated, 0);
 }
 
-TEST(monotonic_buffer_resource, release) {
+TEST(pmr_monotonic_buffer_resource, release) {
   dummy_allocator dummy;
   {
     pmr::monotonic_buffer_resource tmp{&dummy};
diff --git a/test/pmr/test_pmr_new.cpp b/test/pmr/test_pmr_new.cpp
index efa11823..dff66636 100644
--- a/test/pmr/test_pmr_new.cpp
+++ b/test/pmr/test_pmr_new.cpp
@@ -68,6 +68,8 @@ TEST(pmr_new, new$array) {
 
 namespace {
 
+int construct_count__ = 0;
+
 class Base {
 public:
   virtual ~Base() = default;
@@ -76,7 +78,14 @@ class Base {
 
 class Derived : public Base {
 public:
-  Derived(int value) : value_(value) {}
+  Derived(int value) : value_(value) {
+    construct_count__ = value_;
+  }
+
+  ~Derived() override {
+    construct_count__ = 0;
+  }
+
   int get() const override { return value_; }
 
 private:
@@ -89,9 +98,19 @@ TEST(pmr_new, delete$poly) {
   Base *p = pmr::new$<Derived>(-1);
   ASSERT_NE(p, nullptr);
   ASSERT_EQ(p->get(), -1);
+  ASSERT_EQ(construct_count__, -1);
   pmr::delete$(p);
+  ASSERT_EQ(construct_count__, 0);
 
   ASSERT_EQ(p, pmr::new$<Derived>((std::numeric_limits<int>::max)()));
   ASSERT_EQ(p->get(), (std::numeric_limits<int>::max)());
+  ASSERT_EQ(construct_count__, (std::numeric_limits<int>::max)());
+  pmr::delete$(p);
+  ASSERT_EQ(construct_count__, 0);
+}
+
+TEST(pmr_new, delete$null) {
+  Base *p = nullptr;
   pmr::delete$(p);
+  SUCCEED();
 }
diff --git a/test/pmr/test_pmr_small_storage.cpp b/test/pmr/test_pmr_small_storage.cpp
index 0f575134..c2da3f9c 100644
--- a/test/pmr/test_pmr_small_storage.cpp
+++ b/test/pmr/test_pmr_small_storage.cpp
@@ -6,7 +6,7 @@
 
 #include "libpmr/small_storage.h"
 
-TEST(small_storage, holder_construct) {
+TEST(pmr_small_storage, holder_construct) {
   pmr::holder_null();
   pmr::holder<int, true>();
   pmr::holder<int, false>();
@@ -15,7 +15,7 @@ TEST(small_storage, holder_construct) {
   SUCCEED();
 }
 
-TEST(small_storage, holder_copy_move_construct) {
+TEST(pmr_small_storage, holder_copy_move_construct) {
   EXPECT_FALSE(std::is_copy_constructible<pmr::holder_null>::value);
   EXPECT_FALSE((std::is_copy_constructible<pmr::holder<int, true>>::value));
   EXPECT_FALSE((std::is_copy_constructible<pmr::holder<int, false>>::value));
@@ -52,7 +52,7 @@ struct foo {
 
 } // namespace
 
-TEST(small_storage, holder_copy_move_object_stack) {
+TEST(pmr_small_storage, holder_copy_move_object_stack) {
   pmr::allocator alc;
   pmr::holder<foo, true> h1(alc, 1);
   pmr::holder<foo, true> h2, h3;
@@ -67,7 +67,7 @@ TEST(small_storage, holder_copy_move_object_stack) {
   h3.destroy(alc);
 }
 
-TEST(small_storage, holder_copy_move_object_heap) {
+TEST(pmr_small_storage, holder_copy_move_object_heap) {
   pmr::allocator alc;
   pmr::holder<foo, false> h4(alc, 1);
   pmr::holder<foo, false> h5, h6;
@@ -82,7 +82,7 @@ TEST(small_storage, holder_copy_move_object_heap) {
   h6.destroy(alc);
 }
 
-TEST(small_storage, holder_copy_move_array_stack) {
+TEST(pmr_small_storage, holder_copy_move_array_stack) {
   pmr::allocator alc;
   void *ph1 = std::malloc(pmr::holder<void, true>::full_sizeof<int>(10));
   void *ph2 = std::malloc(pmr::holder<void, true>::full_sizeof<int>(10));
@@ -104,7 +104,7 @@ TEST(small_storage, holder_copy_move_array_stack) {
   std::free(ph3);
 }
 
-TEST(small_storage, holder_copy_move_array_heap) {
+TEST(pmr_small_storage, holder_copy_move_array_heap) {
   pmr::allocator alc;
   pmr::holder<void, false> h10(alc, ::LIBIMP::types<int>{}, 10);
   pmr::holder<void, false> h11, h12;
@@ -119,7 +119,7 @@ TEST(small_storage, holder_copy_move_array_heap) {
   h12.destroy(alc);
 }
 
-TEST(small_storage, sizeof) {
+TEST(pmr_small_storage, sizeof) {
   EXPECT_EQ(sizeof(pmr::holder_null), sizeof(void *));
   EXPECT_EQ(sizeof(pmr::holder<int, true>), sizeof(void *) + imp::round_up(sizeof(int), alignof(void *)));
   EXPECT_EQ(sizeof(pmr::holder<int, false>), sizeof(void *) + sizeof(void *));
@@ -133,12 +133,12 @@ TEST(small_storage, sizeof) {
   EXPECT_GT(sizeof(pmr::small_storage<4096>), 4096);
 }
 
-TEST(small_storage, construct) {
+TEST(pmr_small_storage, construct) {
   pmr::small_storage<64> ss;
   SUCCEED();
 }
 
-TEST(small_storage, acquire) {
+TEST(pmr_small_storage, acquire) {
   pmr::small_storage<128> ss;
   pmr::allocator alc;
   ASSERT_FALSE(ss.valid());

From de80de3828a60f0af55ccfcacecde1de9213fa2c Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 6 Jan 2024 18:10:52 +0800
Subject: [PATCH 235/272] Refactor regular_sizeof function and fix type
 conversion warnings in test_pmr_new.cpp

---
 include/libpmr/new.h      | 28 ++++++++++++++++------------
 test/pmr/test_pmr_new.cpp |  4 ++--
 2 files changed, 18 insertions(+), 14 deletions(-)

diff --git a/include/libpmr/new.h b/include/libpmr/new.h
index 2ef15c87..7200987b 100644
--- a/include/libpmr/new.h
+++ b/include/libpmr/new.h
@@ -22,21 +22,21 @@
 LIBPMR_NAMESPACE_BEG_
 
 constexpr inline std::size_t regular_level(std::size_t s) noexcept {
-  if (s <= 128  ) return 0;
-  if (s <= 1024 ) return 1;
-  if (s <= 8192 ) return 2;
-  if (s <= 65536) return 3;
-  return 4;
+  return (s <= 128  ) ? 0 :
+         (s <= 1024 ) ? 1 :
+         (s <= 8192 ) ? 2 :
+         (s <= 65536) ? 3 : 4;
+}
+
+constexpr inline std::size_t regular_sizeof_impl(std::size_t l, std::size_t s) noexcept {
+  return (l == 0) ? std::max<std::size_t>(::LIBIMP::round_up<std::size_t>(s, 8), regular_head_size) :
+         (l == 1) ? ::LIBIMP::round_up<std::size_t>(s, 128) :
+         (l == 2) ? ::LIBIMP::round_up<std::size_t>(s, 1024) :
+         (l == 3) ? ::LIBIMP::round_up<std::size_t>(s, 8192) : (std::numeric_limits<std::size_t>::max)();
 }
 
 constexpr inline std::size_t regular_sizeof(std::size_t s) noexcept {
-  switch (regular_level(s)) {
-    case 0 : return std::max<std::size_t>(::LIBIMP::round_up<std::size_t>(s, 8), regular_head_size);
-    case 1 : return ::LIBIMP::round_up<std::size_t>(s, 128);
-    case 2 : return ::LIBIMP::round_up<std::size_t>(s, 1024);
-    case 3 : return ::LIBIMP::round_up<std::size_t>(s, 8192);
-    default: return (std::numeric_limits<std::size_t>::max)();
-  }
+  return regular_sizeof_impl(regular_level(s), s);
 }
 
 template <typename T>
@@ -179,7 +179,11 @@ void delete$(T *p) noexcept {
   ::LIBIMP::destroy(p);
   auto *mem_res = regular_resource<regular_sizeof<T>()>::get();
   if (mem_res == nullptr) return;
+#if defined(LIBIMP_CC_MSVC_2015)
+  mem_res->deallocate(p, sizeof(T));
+#else
   mem_res->deallocate(p, sizeof(T), alignof(T));
+#endif
 }
 
 LIBPMR_NAMESPACE_END_
diff --git a/test/pmr/test_pmr_new.cpp b/test/pmr/test_pmr_new.cpp
index dff66636..fbf9aa5e 100644
--- a/test/pmr/test_pmr_new.cpp
+++ b/test/pmr/test_pmr_new.cpp
@@ -42,12 +42,12 @@ template <std::size_t Pts, std::size_t N>
 void test_new$array() {
   std::array<void *, Pts> pts;
   using T = std::array<char, N>;
-  for (int i = 0; i < pts.size(); ++i) {
+  for (int i = 0; i < (int)pts.size(); ++i) {
     auto p = pmr::new$<T>();
     pts[i] = p;
     std::memset(p, i, sizeof(T));
   }
-  for (int i = 0; i < pts.size(); ++i) {
+  for (int i = 0; i < (int)pts.size(); ++i) {
     T tmp;
     std::memset(&tmp, i, sizeof(T));
     ASSERT_EQ(std::memcmp(pts[i], &tmp, sizeof(T)), 0);

From 01bbcf7dca95035c35090124c8de6684b91b77ba Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 6 Jan 2024 18:17:57 +0800
Subject: [PATCH 236/272] Fix block_pool_resource allocation and deallocation

---
 include/libpmr/new.h | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/include/libpmr/new.h b/include/libpmr/new.h
index 7200987b..73b3c8d9 100644
--- a/include/libpmr/new.h
+++ b/include/libpmr/new.h
@@ -30,7 +30,7 @@ constexpr inline std::size_t regular_level(std::size_t s) noexcept {
 
 constexpr inline std::size_t regular_sizeof_impl(std::size_t l, std::size_t s) noexcept {
   return (l == 0) ? std::max<std::size_t>(::LIBIMP::round_up<std::size_t>(s, 8), regular_head_size) :
-         (l == 1) ? ::LIBIMP::round_up<std::size_t>(s, 128) :
+         (l == 1) ? ::LIBIMP::round_up<std::size_t>(s, 128 ) :
          (l == 2) ? ::LIBIMP::round_up<std::size_t>(s, 1024) :
          (l == 3) ? ::LIBIMP::round_up<std::size_t>(s, 8192) : (std::numeric_limits<std::size_t>::max)();
 }
@@ -107,15 +107,19 @@ class block_pool_resource : public block_pool<BlockSize, BlockPoolExpansion>
     }
     auto &map = get_block_pool_map();
     auto it = map.find(r_size);
-    if ((it == map.end()) || (it->second == nullptr)) LIBIMP_TRY {
-      // If the corresponding memory resource cannot be found, 
-      // create a temporary general-purpose block pool to deallocate memory.
-      it = map.emplace(r_size, new block_pool_resource<0, 0>).first;
-    } LIBIMP_CATCH(...) {
-      // If the memory resource cannot be created, 
-      // store the pointer directly to avoid leakage.
-      base_t::deallocate(p);
-      return;
+    if ((it == map.end()) || (it->second == nullptr)) {
+      block_pool_resource<0, 0> *bp = nullptr;
+      LIBIMP_TRY {
+        // If the corresponding memory resource cannot be found, 
+        // create a temporary general-purpose block pool to deallocate memory.
+        it = map.emplace(r_size, bp = new block_pool_resource<0, 0>).first;
+      } LIBIMP_CATCH(...) {
+        // If the memory resource cannot be created, 
+        // store the pointer directly to avoid leakage.
+        delete bp;
+        base_t::deallocate(p);
+        return;
+      }
     }
     it->second->deallocate(p);
   }

From 5aaa78a8a5ed5596f502d3369716927c66017271 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 7 Jan 2024 22:43:21 +0800
Subject: [PATCH 237/272] Add comments and refine the implementation.

---
 include/libpmr/new.h | 88 ++++++++++++++++++++++++--------------------
 src/libpmr/new.cpp   | 12 ++++++
 2 files changed, 61 insertions(+), 39 deletions(-)
 create mode 100644 src/libpmr/new.cpp

diff --git a/include/libpmr/new.h b/include/libpmr/new.h
index 73b3c8d9..6973ce09 100644
--- a/include/libpmr/new.h
+++ b/include/libpmr/new.h
@@ -14,6 +14,7 @@
 #include "libimp/uninitialized.h"
 #include "libimp/byte.h"
 #include "libimp/detect_plat.h"
+#include "libimp/export.h"
 
 #include "libpmr/def.h"
 #include "libpmr/block_pool.h"
@@ -21,6 +22,7 @@
 
 LIBPMR_NAMESPACE_BEG_
 
+/// \brief Select the incremental level based on the size.
 constexpr inline std::size_t regular_level(std::size_t s) noexcept {
   return (s <= 128  ) ? 0 :
          (s <= 1024 ) ? 1 :
@@ -28,6 +30,7 @@ constexpr inline std::size_t regular_level(std::size_t s) noexcept {
          (s <= 65536) ? 3 : 4;
 }
 
+/// \brief Calculates the appropriate memory block size based on the increment level and size.
 constexpr inline std::size_t regular_sizeof_impl(std::size_t l, std::size_t s) noexcept {
   return (l == 0) ? std::max<std::size_t>(::LIBIMP::round_up<std::size_t>(s, 8), regular_head_size) :
          (l == 1) ? ::LIBIMP::round_up<std::size_t>(s, 128 ) :
@@ -35,54 +38,51 @@ constexpr inline std::size_t regular_sizeof_impl(std::size_t l, std::size_t s) n
          (l == 3) ? ::LIBIMP::round_up<std::size_t>(s, 8192) : (std::numeric_limits<std::size_t>::max)();
 }
 
+/// \brief Calculates the appropriate memory block size based on the size.
 constexpr inline std::size_t regular_sizeof(std::size_t s) noexcept {
   return regular_sizeof_impl(regular_level(s), s);
 }
 
+/// \brief Calculates the appropriate memory block size based on the specific type.
 template <typename T>
 constexpr inline std::size_t regular_sizeof() noexcept {
   return regular_sizeof(regular_head_size + sizeof(T));
 }
 
-class block_pool_like {
+/// \brief Defines the memory block collector interface.
+class LIBIMP_EXPORT block_collector {
  public:
-  virtual ~block_pool_like() noexcept = default;
-  virtual void *allocate() noexcept = 0;
+  virtual ~block_collector() noexcept = default;
   virtual void deallocate(void *p) noexcept = 0;
 };
 
-inline std::unordered_map<std::size_t, block_pool_like *> &get_block_pool_map() noexcept {
-  thread_local std::unordered_map<std::size_t, block_pool_like *> instances;
-  return instances;
-}
+/// \brief Gets all block pools of the thread cache.
+LIBIMP_EXPORT auto get_thread_block_pool_map() noexcept
+  -> std::unordered_map<std::size_t, block_collector *> &;
 
+/// \brief Defines block pool memory resource based on block pool.
 template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
 class block_pool_resource;
 
+/// \brief Memory block collector of unknown size.
+/// \note This memory resource is only used to temporarily collect memory blocks 
+///       that cannot find a suitable block pool memory resource.
 template <>
 class block_pool_resource<0, 0> : public block_pool<0, 0>
-                                , public block_pool_like {
-
-  void *allocate() noexcept override {
-    return nullptr;
-  }
-
+                                , public block_collector {
 public:
   void deallocate(void *p) noexcept override {
     block_pool<0, 0>::deallocate(p);
   }
 };
 
+/// \brief A block pool memory resource for a block of memory of a specific size.
 template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
 class block_pool_resource : public block_pool<BlockSize, BlockPoolExpansion>
-                          , public block_pool_like {
+                          , public block_collector {
 
   using base_t = block_pool<BlockSize, BlockPoolExpansion>;
 
-  void *allocate() noexcept override {
-    return base_t::allocate();
-  }
-
   void deallocate(void *p) noexcept override {
     base_t::deallocate(p);
   }
@@ -105,7 +105,9 @@ class block_pool_resource : public block_pool<BlockSize, BlockPoolExpansion>
       base_t::deallocate(p);
       return;
     }
-    auto &map = get_block_pool_map();
+    // When the actual size exceeds the current memory block size, 
+    // try to find a suitable pool among all memory block pools for this thread.
+    auto &map = get_thread_block_pool_map();
     auto it = map.find(r_size);
     if ((it == map.end()) || (it->second == nullptr)) {
       block_pool_resource<0, 0> *bp = nullptr;
@@ -128,13 +130,16 @@ class block_pool_resource : public block_pool<BlockSize, BlockPoolExpansion>
 template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
 auto block_pool_resource<BlockSize, BlockPoolExpansion>::get() noexcept
   -> block_pool_resource<BlockSize, BlockPoolExpansion> * {
-  auto &map = get_block_pool_map();
   thread_local block_pool_resource *pi = nullptr;
   if (pi != nullptr) {
     return pi;
   }
+  // Create a new block pool resource for this thread.
+  auto &map = get_thread_block_pool_map();
   auto it = map.find(BlockSize);
   if ((it != map.end()) && (it->second != nullptr)) {
+    // If there are existing block pool resources in the thread cache, 
+    // a new block pool resource is constructed based on it and the cache is updated.
     auto *bp = static_cast <block_pool<0, 0> *>(
                dynamic_cast<block_pool_resource<0, 0> *>(it->second));
     if (bp == nullptr) {
@@ -142,34 +147,35 @@ auto block_pool_resource<BlockSize, BlockPoolExpansion>::get() noexcept
     }
     thread_local block_pool_resource instance(std::move(*bp));
     delete static_cast<block_pool_resource<0, 0> *>(bp);
-    pi = &instance;
+    it->second = pi = &instance;
+    return pi;
   } else {
+    // If there are no existing block pool resources in the thread cache, 
+    // the thread local storage instance is constructed and the pointer is cached.
     thread_local block_pool_resource instance;
-    pi = &instance;
-  }
-  LIBIMP_TRY {
-    map.emplace(BlockSize, pi);
-  } LIBIMP_CATCH(...) {
-    return nullptr;
+    LIBIMP_TRY {
+      map.emplace(BlockSize, pi = &instance);
+      return pi;
+    } LIBIMP_CATCH(...) {
+      return nullptr;
+    }
   }
-  return pi;
 }
 
+/// \brief Match the appropriate memory block resources 
+///        according to the size of the specification.
 template <std::size_t N, std::size_t L = regular_level(N)>
 class regular_resource : public new_delete_resource {};
 
-template <std::size_t N>
-class regular_resource<N, 0> : public block_pool_resource<N, 512> {};
-
-template <std::size_t N>
-class regular_resource<N, 1> : public block_pool_resource<N, 256> {};
-
-template <std::size_t N>
-class regular_resource<N, 2> : public block_pool_resource<N, 128> {};
-
-template <std::size_t N>
-class regular_resource<N, 3> : public block_pool_resource<N, 64> {};
+/// \brief Different increment levels match different chunk sizes.
+///        512 means that 512 consecutive memory blocks are allocated at a time, and the block size is N.
+template <std::size_t N> class regular_resource<N, 0> : public block_pool_resource<N, 512> {};
+template <std::size_t N> class regular_resource<N, 1> : public block_pool_resource<N, 256> {};
+template <std::size_t N> class regular_resource<N, 2> : public block_pool_resource<N, 128> {};
+template <std::size_t N> class regular_resource<N, 3> : public block_pool_resource<N, 64 > {};
 
+/// \brief Creates an object based on the specified type and parameters with block pool resource.
+/// \note This function is thread-safe.
 template <typename T, typename... A>
 T *new$(A &&... args) noexcept {
   auto *mem_res = regular_resource<regular_sizeof<T>()>::get();
@@ -177,6 +183,9 @@ T *new$(A &&... args) noexcept {
   return ::LIBIMP::construct<T>(mem_res->allocate(sizeof(T), alignof(T)), std::forward<A>(args)...);
 }
 
+/// \brief Destroys object previously allocated by the `new$` and releases obtained memory area.
+/// \note This function is thread-safe. If the pointer type passed in is different from `new$`, 
+///       additional performance penalties may be incurred.
 template <typename T>
 void delete$(T *p) noexcept {
   if (p == nullptr) return;
@@ -184,6 +193,7 @@ void delete$(T *p) noexcept {
   auto *mem_res = regular_resource<regular_sizeof<T>()>::get();
   if (mem_res == nullptr) return;
 #if defined(LIBIMP_CC_MSVC_2015)
+  // `alignof` of vs2015 requires that type must be able to be instantiated.
   mem_res->deallocate(p, sizeof(T));
 #else
   mem_res->deallocate(p, sizeof(T), alignof(T));
diff --git a/src/libpmr/new.cpp b/src/libpmr/new.cpp
new file mode 100644
index 00000000..db9c1aa7
--- /dev/null
+++ b/src/libpmr/new.cpp
@@ -0,0 +1,12 @@
+
+#include "libpmr/new.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+auto get_thread_block_pool_map() noexcept 
+  -> std::unordered_map<std::size_t, block_collector *> & {
+  thread_local std::unordered_map<std::size_t, block_collector *> instances;
+  return instances;
+}
+
+LIBPMR_NAMESPACE_END_

From 2cffe55ee1783f51bc0489213694812885b92ef7 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 13 Jan 2024 16:20:06 +0800
Subject: [PATCH 238/272] Update constants to use static constexpr

---
 include/libconcur/concurrent.h             |  6 ++---
 include/libimp/countof.h                   | 10 ++++----
 include/libimp/dataof.h                    | 16 ++++++-------
 include/libimp/log.h                       |  2 +-
 include/libimp/result.h                    | 28 +++++++++++-----------
 include/libpmr/block_pool.h                |  4 ++--
 include/libpmr/small_storage.h             |  2 +-
 src/libimp/fmt.cpp                         |  2 +-
 test/concur/test_concur_circular_queue.cpp |  2 +-
 test/concur/test_concur_concurrent.cpp     |  4 ++--
 10 files changed, 38 insertions(+), 38 deletions(-)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index 440d6646..33d8692f 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -379,15 +379,15 @@ struct producer<trans::broadcast, relation::multi> {
 private:
   friend struct producer::header_impl;
 
-  constexpr static index_t get_index(state::flag_t flags) noexcept {
+  static constexpr index_t get_index(state::flag_t flags) noexcept {
     return index_t(flags);
   }
 
-  constexpr static index_t get_begin(state::flag_t flags) noexcept {
+  static constexpr index_t get_begin(state::flag_t flags) noexcept {
     return index_t(flags >> (sizeof(index_t) * CHAR_BIT));
   }
 
-  constexpr static state::flag_t make_flags(index_t idx, index_t beg) noexcept {
+  static constexpr state::flag_t make_flags(index_t idx, index_t beg) noexcept {
     return state::flag_t(idx) | (state::flag_t(beg) << (sizeof(index_t) * CHAR_BIT));
   }
 };
diff --git a/include/libimp/countof.h b/include/libimp/countof.h
index 72df2515..b35a95c0 100644
--- a/include/libimp/countof.h
+++ b/include/libimp/countof.h
@@ -29,7 +29,7 @@ struct trait_has_size {
   static std::false_type check(...);
 public:
   using type = decltype(check<T>(nullptr));
-  constexpr static auto value = type::value;
+  static constexpr auto value = type::value;
 };
 
 template <typename T>
@@ -41,7 +41,7 @@ struct trait_has_Size {
   static std::false_type check(...);
 public:
   using type = decltype(check<T>(nullptr));
-  constexpr static auto value = type::value;
+  static constexpr auto value = type::value;
 };
 
 template <typename C, bool = trait_has_size<C>::value
@@ -50,21 +50,21 @@ struct trait;
 
 template <typename T, std::size_t N>
 struct trait<T[N], false, false> {
-  constexpr static auto countof(T const (&)[N]) noexcept {
+  static constexpr auto countof(T const (&)[N]) noexcept {
     return N;
   }
 };
 
 template <typename C, bool B>
 struct trait<C, true, B> {
-  constexpr static auto countof(C const &c) noexcept(noexcept(c.size())) {
+  static constexpr auto countof(C const &c) noexcept(noexcept(c.size())) {
     return c.size();
   }
 };
 
 template <typename C>
 struct trait<C, false, true> {
-  constexpr static auto countof(C const &c) noexcept(noexcept(c.Size())) {
+  static constexpr auto countof(C const &c) noexcept(noexcept(c.Size())) {
     return c.Size();
   }
 };
diff --git a/include/libimp/dataof.h b/include/libimp/dataof.h
index de19f622..baddd065 100644
--- a/include/libimp/dataof.h
+++ b/include/libimp/dataof.h
@@ -29,7 +29,7 @@ struct trait_has_data {
   static std::false_type check(...);
 public:
   using type = decltype(check<T>(nullptr));
-  constexpr static auto value = type::value;
+  static constexpr auto value = type::value;
 };
 
 template <typename T>
@@ -41,7 +41,7 @@ struct trait_has_Data {
   static std::false_type check(...);
 public:
   using type = decltype(check<T>(nullptr));
-  constexpr static auto value = type::value;
+  static constexpr auto value = type::value;
 };
 
 template <typename C, bool = trait_has_data<C>::value
@@ -50,10 +50,10 @@ struct trait;
 
 template <typename T, std::size_t N>
 struct trait<T[N], false, false> {
-  constexpr static T const *dataof(T const (&arr)[N]) noexcept {
+  static constexpr T const *dataof(T const (&arr)[N]) noexcept {
     return arr;
   }
-  constexpr static T *dataof(T (&arr)[N]) noexcept {
+  static constexpr T *dataof(T (&arr)[N]) noexcept {
     return arr;
   }
 };
@@ -61,7 +61,7 @@ struct trait<T[N], false, false> {
 template <typename C, bool B>
 struct trait<C, true, B> {
   template <typename T>
-  constexpr static auto dataof(T &&c) noexcept(noexcept(c.data())) {
+  static constexpr auto dataof(T &&c) noexcept(noexcept(c.data())) {
     return std::forward<T>(c).data();
   }
 };
@@ -69,7 +69,7 @@ struct trait<C, true, B> {
 template <typename C>
 struct trait<C, false, true> {
   template <typename T>
-  constexpr static auto dataof(T &&c) noexcept(noexcept(c.Data())) {
+  static constexpr auto dataof(T &&c) noexcept(noexcept(c.Data())) {
     return std::forward<T>(c).Data();
   }
 };
@@ -77,11 +77,11 @@ struct trait<C, false, true> {
 template <typename C>
 struct trait<C, false, false> {
   template <typename T>
-  constexpr static T const *dataof(std::initializer_list<T> il) noexcept {
+  static constexpr T const *dataof(std::initializer_list<T> il) noexcept {
     return il.begin();
   }
   template <typename T>
-  constexpr static T const *dataof(T const *p) noexcept {
+  static constexpr T const *dataof(T const *p) noexcept {
     return p;
   }
 };
diff --git a/include/libimp/log.h b/include/libimp/log.h
index 01c8edc2..acbf6eb7 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -54,7 +54,7 @@ bool unfold_tuple_fmt_to(fmt_context &ctx, Tp const &tp, std::index_sequence<I..
 
 template <typename... T>
 bool context_to_string(fmt_context &f_ctx, context<T...> const &l_ctx) noexcept {
-  constexpr static char types[] = {
+  static constexpr char types[] = {
     'T', 'D', 'I', 'W', 'E', 'F',
   };
   LIBIMP_TRY {
diff --git a/include/libimp/result.h b/include/libimp/result.h
index f74f450c..6b9d3746 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -41,27 +41,27 @@ struct generic_traits {
   using storage_t = std::tuple<T, std::error_code>;
 
   /// \brief Custom initialization.
-  constexpr static void init_code(storage_t &code) noexcept {
+  static constexpr void init_code(storage_t &code) noexcept {
     code = {{}, std::error_code(-1, std::generic_category())};
   }
-  constexpr static void init_code(storage_t &code, T value, std::error_code const &ec) noexcept {
+  static constexpr void init_code(storage_t &code, T value, std::error_code const &ec) noexcept {
     code = {value, ec};
   }
-  constexpr static void init_code(storage_t &code, T value) noexcept {
+  static constexpr void init_code(storage_t &code, T value) noexcept {
     code = {value, {}};
   }
-  constexpr static void init_code(storage_t &code, std::error_code const &ec) noexcept {
+  static constexpr void init_code(storage_t &code, std::error_code const &ec) noexcept {
     code = {{}, ec};
   }
 
   /// \brief Custom type data acquisition.
-  constexpr static T get_value(storage_t const &code) noexcept {
+  static constexpr T get_value(storage_t const &code) noexcept {
     return std::get<0>(code);
   }
-  constexpr static bool get_ok(storage_t const &code) noexcept {
+  static constexpr bool get_ok(storage_t const &code) noexcept {
     return !std::get<1>(code);
   }
-  constexpr static std::error_code get_error(storage_t const &code) noexcept {
+  static constexpr std::error_code get_error(storage_t const &code) noexcept {
     return std::get<1>(code);
   }
 };
@@ -72,18 +72,18 @@ struct default_traits<void, ___> {
   using storage_t = std::error_code;
 
   /// \brief Custom initialization.
-  constexpr static void init_code(storage_t &code) noexcept {
+  static constexpr void init_code(storage_t &code) noexcept {
     code = std::error_code(-1, std::generic_category());
   }
-  constexpr static void init_code(storage_t &code, std::error_code const &ec) noexcept {
+  static constexpr void init_code(storage_t &code, std::error_code const &ec) noexcept {
     code = ec;
   }
 
   /// \brief Custom type data acquisition.
-  constexpr static bool get_ok(storage_t const &code) noexcept {
+  static constexpr bool get_ok(storage_t const &code) noexcept {
     return !code;
   }
-  constexpr static std::error_code get_error(storage_t const &code) noexcept {
+  static constexpr std::error_code get_error(storage_t const &code) noexcept {
     return code;
   }
 
@@ -94,7 +94,7 @@ struct default_traits<void, ___> {
 template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> : generic_traits<T> {
   /// \brief Custom initialization.
-  constexpr static void init_code(typename generic_traits<T>::storage_t &code, 
+  static constexpr void init_code(typename generic_traits<T>::storage_t &code, 
                                   T value, bool ok) noexcept {
     code = {value, ok ? std::error_code() : std::error_code(-1, std::generic_category())};
   }
@@ -107,11 +107,11 @@ struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> : generic
 template <typename T>
 struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> : generic_traits<T> {
   /// \brief Custom initialization.
-  constexpr static void init_code(typename generic_traits<T>::storage_t &code, 
+  static constexpr void init_code(typename generic_traits<T>::storage_t &code, 
                                   std::nullptr_t, std::error_code const &ec) noexcept {
     code = {nullptr, ec};
   }
-  constexpr static void init_code(typename generic_traits<T>::storage_t &code, 
+  static constexpr void init_code(typename generic_traits<T>::storage_t &code, 
                                   std::nullptr_t) noexcept {
     code = {nullptr, std::error_code(-1, std::generic_category())};
   }
diff --git a/include/libpmr/block_pool.h b/include/libpmr/block_pool.h
index 7649634b..7fc11419 100644
--- a/include/libpmr/block_pool.h
+++ b/include/libpmr/block_pool.h
@@ -163,7 +163,7 @@ class block_pool<0, 0> {
   using central_cache_pool_t = central_cache_pool<block_t, 0>;
 
 public:
-  constexpr static std::size_t block_size = 0;
+  static constexpr std::size_t block_size = 0;
 
   block_pool() noexcept : cursor_(central_cache_pool_t::instance().aqueire()) {}
   ~block_pool() noexcept {
@@ -202,7 +202,7 @@ class block_pool {
   }
 
 public:
-  constexpr static std::size_t block_size = BlockSize;
+  static constexpr std::size_t block_size = BlockSize;
 
   block_pool() noexcept : cursor_(expand()) {}
   ~block_pool() noexcept {
diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
index 58d6792a..aee998df 100644
--- a/include/libpmr/small_storage.h
+++ b/include/libpmr/small_storage.h
@@ -494,7 +494,7 @@ class holder<void, false> : public holder_base {
 template <std::size_t N>
 class small_storage {
 
-  constexpr static std::size_t storage_size = sizeof(holder<void *, false>) - sizeof(void *) + N;
+  static constexpr std::size_t storage_size = sizeof(holder<void *, false>) - sizeof(void *) + N;
   static_assert(storage_size >= sizeof(holder<void *, false>), "N is not large enough to hold a pointer.");
 
   alignas(std::max_align_t) std::array<::LIBIMP::byte, storage_size> storage_;
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
index 94bb2849..ac17e926 100644
--- a/src/libimp/fmt.cpp
+++ b/src/libimp/fmt.cpp
@@ -21,7 +21,7 @@ LIBIMP_NAMESPACE_BEG_
 namespace {
 
 struct sfmt_policy {
-  constexpr static std::size_t aligned_size = 32U;
+  static constexpr std::size_t aligned_size = 32U;
 };
 
 template <typename Policy = sfmt_policy>
diff --git a/test/concur/test_concur_circular_queue.cpp b/test/concur/test_concur_circular_queue.cpp
index 018b79c3..54fc1c84 100644
--- a/test/concur/test_concur_circular_queue.cpp
+++ b/test/concur/test_concur_circular_queue.cpp
@@ -93,7 +93,7 @@ void test_queue(std::size_t np, std::size_t nc) {
   };
   circular_queue<Data, PR, CR> que;
 
-  constexpr static std::uint32_t loop_size = 10'0000;
+  static constexpr std::uint32_t loop_size = 10'0000;
 
   std::atomic<std::uint64_t> sum {0};
   std::atomic<std::size_t> running {np};
diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index b521a274..f8e18373 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -95,7 +95,7 @@ void test_unicast(std::size_t np, std::size_t nc) {
   LIBIMP_LOG_();
   log.info("\n\tStart with: ", imp::nameof<PC>(), ", ", np, " producers, ", nc, " consumers...");
 
-  constexpr static std::uint32_t loop_size = 100'0000;
+  static constexpr std::uint32_t loop_size = 100'0000;
 
   concur::element<std::uint64_t> circ[32] {};
   PC pc;
@@ -232,7 +232,7 @@ void test_broadcast(std::size_t np, std::size_t nc) {
     typename concur::traits<PC>::header hdr {imp::make_span(circ)};
     ASSERT_TRUE(hdr.valid());
 
-    constexpr static std::uint32_t loop_size = 10'0000;
+    static constexpr std::uint32_t loop_size = 10'0000;
 
     std::atomic<std::uint64_t> sum {0};
     std::atomic<std::size_t> running {np};

From 30e5af90b30d7b234c9e0dfddd0f8ed429a2c1d1 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 13 Jan 2024 18:20:53 +0800
Subject: [PATCH 239/272] Refactor log class names and function names

---
 include/libimp/log.h      | 32 ++++++++++++++++----------------
 test/imp/test_imp_log.cpp |  6 +++++-
 2 files changed, 21 insertions(+), 17 deletions(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index acbf6eb7..7ceee109 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -109,20 +109,20 @@ inline auto &make_std_out() noexcept {
  * \brief Log information grips.
  */
 template <typename Outputer>
-class grip {
+class logger {
   Outputer out_;
   char const *func_;
   level level_limit_;
 
 public:
   template <typename O>
-  grip(char const *func, O &&out, level level_limit) noexcept 
+  logger(char const *func, O &&out, level level_limit) noexcept 
     : out_        (std::forward<O>(out))
     , func_       (func)
     , level_limit_(level_limit) {}
 
   template <typename... A>
-  grip const &operator()(log::level l, A &&...args) const noexcept {
+  logger const &operator()(log::level l, A &&...args) const noexcept {
     if (underlyof(l) < underlyof(level_limit_)) {
       return *this;
     }
@@ -135,28 +135,28 @@ class grip {
     return *this;
   }
 
-  template <typename... A> grip const &trace  (A &&...args) const noexcept { return (*this)(log::level::trace  , std::forward<A>(args)...); }
-  template <typename... A> grip const &debug  (A &&...args) const noexcept { return (*this)(log::level::debug  , std::forward<A>(args)...); }
-  template <typename... A> grip const &info   (A &&...args) const noexcept { return (*this)(log::level::info   , std::forward<A>(args)...); }
-  template <typename... A> grip const &warning(A &&...args) const noexcept { return (*this)(log::level::warning, std::forward<A>(args)...); }
-  template <typename... A> grip const &error  (A &&...args) const noexcept { return (*this)(log::level::error  , std::forward<A>(args)...); }
-  template <typename... A> grip const &failed (A &&...args) const noexcept { return (*this)(log::level::failed , std::forward<A>(args)...); }
+  template <typename... A> logger const &trace  (A &&...args) const noexcept { return (*this)(log::level::trace  , std::forward<A>(args)...); }
+  template <typename... A> logger const &debug  (A &&...args) const noexcept { return (*this)(log::level::debug  , std::forward<A>(args)...); }
+  template <typename... A> logger const &info   (A &&...args) const noexcept { return (*this)(log::level::info   , std::forward<A>(args)...); }
+  template <typename... A> logger const &warning(A &&...args) const noexcept { return (*this)(log::level::warning, std::forward<A>(args)...); }
+  template <typename... A> logger const &error  (A &&...args) const noexcept { return (*this)(log::level::error  , std::forward<A>(args)...); }
+  template <typename... A> logger const &failed (A &&...args) const noexcept { return (*this)(log::level::failed , std::forward<A>(args)...); }
 };
 
 template <typename O>
-inline auto make_grip(char const *func, O &&out, level level_limit = level::info) noexcept {
-  return grip<std::decay_t<O>>(func, std::forward<O>(out), level_limit);
+inline auto make_logger(char const *func, O &&out, level level_limit = level::info) noexcept {
+  return logger<std::decay_t<O>>(func, std::forward<O>(out), level_limit);
 }
 
-inline auto make_grip(char const *func, level level_limit = level::info) noexcept {
-  return make_grip(func, make_std_out(), level_limit);
+inline auto make_logger(char const *func, level level_limit = level::info) noexcept {
+  return make_logger(func, make_std_out(), level_limit);
 }
 
-inline auto make_grip(char const * /*ignore*/, char const *name, level level_limit = level::info) noexcept {
-  return make_grip(name, make_std_out(), level_limit);
+inline auto make_logger(char const * /*ignore*/, char const *name, level level_limit = level::info) noexcept {
+  return make_logger(name, make_std_out(), level_limit);
 }
 
 } // namespace log
 LIBIMP_NAMESPACE_END_
 
-#define LIBIMP_LOG_(...) auto log = ::LIBIMP::log::make_grip(__func__,##__VA_ARGS__)
\ No newline at end of file
+#define LIBIMP_LOG_(...) auto log = ::LIBIMP::log::make_logger(__func__,##__VA_ARGS__)
\ No newline at end of file
diff --git a/test/imp/test_imp_log.cpp b/test/imp/test_imp_log.cpp
index 05a9ee79..206e27de 100644
--- a/test/imp/test_imp_log.cpp
+++ b/test/imp/test_imp_log.cpp
@@ -6,7 +6,7 @@
 
 #include "libimp/log.h"
 
-TEST(log, gripper) {
+TEST(log, logger) {
   {
     LIBIMP_LOG_();
     log.info("hello");
@@ -15,6 +15,10 @@ TEST(log, gripper) {
     LIBIMP_LOG_();
     log.info("hello 2");
   }
+  {
+    LIBIMP_LOG_();
+    log.info(), "hello ", 3;
+  }
   SUCCEED();
 }
 

From f3ecf7c61c0c5545c3a13ba891a04708315d97b9 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 13 Jan 2024 18:39:57 +0800
Subject: [PATCH 240/272] Refactor logging code and update test cases

---
 include/libimp/log.h      | 24 +++++++++++++++++-------
 test/imp/test_imp_log.cpp | 10 +++++-----
 2 files changed, 22 insertions(+), 12 deletions(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index 7ceee109..0efeeecc 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -105,21 +105,31 @@ inline auto &make_std_out() noexcept {
   return std_out;
 }
 
+/**
+ * \brief Log information base class.
+ */
+class logger_base {
+protected:
+  char const *func_;
+  level level_limit_;
+
+  logger_base(char const *func, level level_limit) noexcept
+    : func_       (func)
+    , level_limit_(level_limit) {}
+};
+
 /**
  * \brief Log information grips.
  */
 template <typename Outputer>
-class logger {
+class logger : public logger_base {
   Outputer out_;
-  char const *func_;
-  level level_limit_;
 
 public:
   template <typename O>
-  logger(char const *func, O &&out, level level_limit) noexcept 
-    : out_        (std::forward<O>(out))
-    , func_       (func)
-    , level_limit_(level_limit) {}
+  logger(char const *func, O &&out, level level_limit) noexcept
+    : logger_base(func, level_limit)
+    , out_       (std::forward<O>(out)) {}
 
   template <typename... A>
   logger const &operator()(log::level l, A &&...args) const noexcept {
diff --git a/test/imp/test_imp_log.cpp b/test/imp/test_imp_log.cpp
index 206e27de..1d5bd9b6 100644
--- a/test/imp/test_imp_log.cpp
+++ b/test/imp/test_imp_log.cpp
@@ -17,7 +17,7 @@ TEST(log, logger) {
   }
   {
     LIBIMP_LOG_();
-    log.info(), "hello ", 3;
+    log.info("hello ", 3);
   }
   SUCCEED();
 }
@@ -36,11 +36,11 @@ TEST(log, custom) {
 
   LIBIMP_LOG_(ll);
 
-  log.info ("hello");
-  log.error("failed:");
-  log.info ("log-pt");
+  log.info ("hello", " world");
+  log.error("failed", ":");
+  log.info ("log", '-', "pt");
   log.error("whatever");
 
-  EXPECT_EQ(ll_data.i, "hello log-pt ");
+  EXPECT_EQ(ll_data.i, "hello world log-pt ");
   EXPECT_EQ(ll_data.e, "failed: whatever ");
 }

From f615f200dfb23da258cd22b30648cf3a2be90a17 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 13 Jan 2024 19:05:43 +0800
Subject: [PATCH 241/272] Remove synchronized_pool_resource class and its
 implementation

---
 include/libpmr/synchronized_pool_resource.h | 40 ---------------------
 src/libpmr/synchronized_pool_resource.cpp   | 39 --------------------
 2 files changed, 79 deletions(-)
 delete mode 100644 include/libpmr/synchronized_pool_resource.h
 delete mode 100644 src/libpmr/synchronized_pool_resource.cpp

diff --git a/include/libpmr/synchronized_pool_resource.h b/include/libpmr/synchronized_pool_resource.h
deleted file mode 100644
index 578d494f..00000000
--- a/include/libpmr/synchronized_pool_resource.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/**
- * \file libpmr/synchronized_pool_resource.h
- * \author mutouyun (orz@orzz.org)
- * \brief A thread-safe std::pmr::memory_resource for managing allocations in pools of different block sizes.
- * \date 2023-12-23
- */
-#pragma once
-
-#include <cstddef>  // std::size_t, std::max_align_t
-
-#include "libimp/export.h"
-#include "libpmr/def.h"
-
-LIBPMR_NAMESPACE_BEG_
-
-/**
- * \class LIBIMP_EXPORT synchronized_pool_resource
- * \brief `synchronized_pool_resource` may be accessed from multiple threads without external synchronization, 
- *        and have thread-specific pools to reduce synchronization costs.
- * \note Unlike the standard library implementation, `synchronized_pool_resource` automatically manages 
- *       the block size and reclaims all deallocated memory to the central heap when the thread is destroyed, 
- *       rather than being destructed on its own.
- * \see https://en.cppreference.com/w/cpp/memory/synchronized_pool_resource
- */
-class LIBIMP_EXPORT synchronized_pool_resource {
-public:
-  /// \brief Returns a pointer to a `synchronized_pool_resource`.
-  static synchronized_pool_resource *get() noexcept;
-
-  /// \brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
-  /// \remark Returns nullptr if storage of the requested size and alignment cannot be obtained.
-  /// \see https://en.cppreference.com/w/cpp/memory/memory_resource/do_allocate
-  void *allocate(std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
-
-  /// \brief Deallocates the storage pointed to by p.
-  /// \see https://en.cppreference.com/w/cpp/memory/memory_resource/deallocate
-  void deallocate(void *p, std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
-};
-
-LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/synchronized_pool_resource.cpp b/src/libpmr/synchronized_pool_resource.cpp
deleted file mode 100644
index f14c9966..00000000
--- a/src/libpmr/synchronized_pool_resource.cpp
+++ /dev/null
@@ -1,39 +0,0 @@
-
-#include "libimp/log.h"
-
-#include "libpmr/synchronized_pool_resource.h"
-#include "libpmr/block_pool.h"
-
-#include "verify_args.h"
-
-LIBPMR_NAMESPACE_BEG_
-namespace {
-
-} // namespace
-
-synchronized_pool_resource *synchronized_pool_resource::get() noexcept {
-  static synchronized_pool_resource mem_res;
-  return &mem_res;
-}
-
-void *synchronized_pool_resource::allocate(std::size_t bytes, std::size_t alignment) noexcept {
-  LIBIMP_LOG_();
-  if (!verify_args(bytes, alignment) || (alignment > alignof(std::max_align_t))) {
-    log.error("invalid bytes = ", bytes, ", alignment = ", alignment);
-    return nullptr;
-  }
-  return nullptr;
-}
-
-void synchronized_pool_resource::deallocate(void *p, std::size_t bytes, std::size_t alignment) noexcept {
-  LIBIMP_LOG_();
-  if (p == nullptr) {
-    return;
-  }
-  if (!verify_args(bytes, alignment) || (alignment > alignof(std::max_align_t))) {
-    log.error("invalid bytes = ", bytes, ", alignment = ", alignment);
-    return;
-  }
-}
-
-LIBPMR_NAMESPACE_END_

From 2a1d8fa5faf3f0bb34a2dfc1eaaf299640e539b1 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 9 Mar 2024 19:14:41 +0800
Subject: [PATCH 242/272] Update CMakeLists.txt and expected.h, remove unused
 files, and improve thread safety in block_pool.cpp

---
 CMakeLists.txt              |   2 +-
 benchmark/benchmark_new.cpp | 325 ++++++++++++++++++++++++++++++++++++
 include/libimp/expected.h   |   2 +-
 include/libpmr/def.h        |   3 -
 include/libpmr/new.h        | 156 ++++++-----------
 src/libpmr/block_pool.cpp   |  34 +++-
 src/libpmr/new.cpp          |  12 --
 test/pmr/test_pmr_new.cpp   |  30 ++++
 8 files changed, 438 insertions(+), 126 deletions(-)
 create mode 100644 benchmark/benchmark_new.cpp
 delete mode 100644 src/libpmr/new.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dc686449..d1fd61db 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,7 +11,7 @@ set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 set(CMAKE_CXX_STANDARD 17)
 
 if (MSVC)
-  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /fsanitize=address /Zi")
+  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /Zi")
   set(CompilerFlags
       CMAKE_CXX_FLAGS
       CMAKE_CXX_FLAGS_DEBUG
diff --git a/benchmark/benchmark_new.cpp b/benchmark/benchmark_new.cpp
new file mode 100644
index 00000000..7dc1c677
--- /dev/null
+++ b/benchmark/benchmark_new.cpp
@@ -0,0 +1,325 @@
+
+#include <array>
+#include <cstdlib>
+#include <cstddef>
+
+#include "benchmark/benchmark.h"
+
+#include "libpmr/new.h"
+
+namespace {
+
+template <typename T, std::size_t N>
+class cache {
+public:
+  template <typename U>
+  void push(U &&u) noexcept {
+    data_[idx_++] = std::forward<U>(u);
+  }
+
+  T &pop() noexcept {
+    return data_[--idx_];
+  }
+
+  bool at_begin() const noexcept {
+    return idx_ == 0;
+  }
+
+  bool at_end() const noexcept {
+    return idx_ == N;
+  }
+
+private:
+  std::array<T, N> data_{};
+  std::size_t idx_{};
+};
+
+template <typename P, std::size_t CacheSize = 128>
+class test_suit {
+  void next(std::size_t &idx) noexcept {
+    idx = (idx + 1) % 3;
+  }
+
+public:
+  ~test_suit() noexcept {
+    for (auto &pts : pts_) {
+      while (!pts.at_begin()) {
+        P::deallocate(pts.pop());
+      }
+    }
+  }
+
+  bool test_allocate() noexcept {
+    auto &pts = pts_[idx_a_];
+    pts.push(P::allocate());
+    if (pts.at_end()) {
+      next(idx_a_);
+      idx_d_ = idx_a_;
+    }
+    return ++allocated_ < CacheSize;
+  }
+
+  bool test_deallocate() noexcept {
+    auto &pts = pts_[idx_d_];
+    if (pts.at_begin()) {
+      next(idx_d_);
+      if (allocated_ == CacheSize) {
+        allocated_ = CacheSize / 2;
+        return true;
+      }
+      return allocated_ > 0;
+    }
+    P::deallocate(pts.pop());
+    --allocated_;
+    return true;
+  }
+
+private:
+  cache<void *, CacheSize / 2> pts_[3];
+  std::size_t idx_a_{};
+  std::size_t idx_d_{};
+  std::size_t allocated_{};
+};
+
+template <std::size_t AllocSize>
+struct policy_malloc {
+  static void *allocate() noexcept {
+    return std::malloc(AllocSize);
+  }
+
+  static void deallocate(void *p) noexcept {
+    std::free(p);
+  }
+};
+
+template <std::size_t AllocSize>
+struct policy_cpp_new {
+  static void *allocate() noexcept {
+    return new char[AllocSize];
+  }
+
+  static void deallocate(void *p) noexcept {
+    delete[] static_cast<char *>(p);
+  }
+};
+
+template <std::size_t AllocSize>
+struct policy_pmr_new {
+  static void *allocate() noexcept {
+    return pmr::new$<std::array<char, AllocSize>>();
+  }
+
+  static void deallocate(void *p) noexcept {
+    pmr::delete$(static_cast<std::array<char, AllocSize> *>(p));
+  }
+};
+
+template <template <std::size_t> class P, std::size_t AllocSize>
+void pmr_allocate(benchmark::State &state) {
+  test_suit<P<AllocSize>> suit;
+  for (auto _ : state) {
+    if (suit.test_allocate()) continue;
+    state.PauseTiming();
+    while (suit.test_deallocate()) ;
+    state.ResumeTiming();
+  }
+}
+
+template <template <std::size_t> class P, std::size_t AllocSize>
+void pmr_deallocate(benchmark::State &state) {
+  test_suit<P<AllocSize>> suit;
+  for (auto _ : state) {
+    if (suit.test_deallocate()) continue;
+    state.PauseTiming();
+    while (suit.test_allocate()) ;
+    state.ResumeTiming();
+  }
+}
+
+} // namespace
+
+BENCHMARK(pmr_allocate<policy_malloc, 8>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_malloc, 32>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_malloc, 128>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_malloc, 1024>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_malloc, 8>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_malloc, 32>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_malloc, 128>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_malloc, 1024>)->ThreadRange(1, 16);
+
+BENCHMARK(pmr_allocate<policy_cpp_new, 8>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_cpp_new, 32>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_cpp_new, 128>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_cpp_new, 1024>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_cpp_new, 8>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_cpp_new, 32>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_cpp_new, 128>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_cpp_new, 1024>)->ThreadRange(1, 16);
+
+BENCHMARK(pmr_allocate<policy_pmr_new, 8>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_pmr_new, 32>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_pmr_new, 128>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_pmr_new, 1024>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_pmr_new, 8>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_pmr_new, 32>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_pmr_new, 128>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_pmr_new, 1024>)->ThreadRange(1, 16);
+
+/*
+Run on (16 X 2313.68 MHz CPU s)
+CPU Caches:
+  L1 Data 48 KiB (x8)
+  L1 Instruction 32 KiB (x8)
+  L2 Unified 1280 KiB (x8)
+  L3 Unified 24576 KiB (x1)
+------------------------------------------------------------------------------------------
+Benchmark                                                Time             CPU   Iterations
+------------------------------------------------------------------------------------------
+pmr_allocate<policy_malloc, 8>/threads:1              28.9 ns         29.8 ns     29866667
+pmr_allocate<policy_malloc, 8>/threads:2              28.9 ns         53.7 ns     12800000
+pmr_allocate<policy_malloc, 8>/threads:4              13.4 ns         43.9 ns     14933332
+pmr_allocate<policy_malloc, 8>/threads:8              11.3 ns         68.4 ns      8000000
+pmr_allocate<policy_malloc, 8>/threads:16             5.07 ns         56.7 ns     14336000
+
+pmr_allocate<policy_malloc, 32>/threads:1             44.0 ns         42.1 ns     19298462
+pmr_allocate<policy_malloc, 32>/threads:2             27.4 ns         54.9 ns     12800000
+pmr_allocate<policy_malloc, 32>/threads:4             11.7 ns         47.1 ns     17920000
+pmr_allocate<policy_malloc, 32>/threads:8             5.96 ns         43.7 ns     21082352
+pmr_allocate<policy_malloc, 32>/threads:16            4.09 ns         56.7 ns     17920000
+
+pmr_allocate<policy_malloc, 128>/threads:1            45.8 ns         39.6 ns     16592593
+pmr_allocate<policy_malloc, 128>/threads:2            36.9 ns         75.3 ns      9955556
+pmr_allocate<policy_malloc, 128>/threads:4            16.3 ns         66.7 ns     11946668
+pmr_allocate<policy_malloc, 128>/threads:8            10.7 ns         77.1 ns     13784616
+pmr_allocate<policy_malloc, 128>/threads:16           7.87 ns         94.8 ns     14336000
+
+pmr_allocate<policy_malloc, 1024>/threads:1           75.5 ns         78.8 ns      8726261
+pmr_allocate<policy_malloc, 1024>/threads:2           49.6 ns         46.9 ns     20000000
+pmr_allocate<policy_malloc, 1024>/threads:4           18.4 ns         40.8 ns     29866668
+pmr_allocate<policy_malloc, 1024>/threads:8           6.56 ns         25.6 ns     29866664
+pmr_allocate<policy_malloc, 1024>/threads:16          6.25 ns         56.6 ns     16000000
+------------------------------------------------------------------------------------------
+pmr_deallocate<policy_malloc, 8>/threads:1            18.6 ns         19.9 ns     47786667
+pmr_deallocate<policy_malloc, 8>/threads:2            8.52 ns         16.2 ns     47157894
+pmr_deallocate<policy_malloc, 8>/threads:4            4.75 ns         18.8 ns     40000000
+pmr_deallocate<policy_malloc, 8>/threads:8            3.18 ns         24.7 ns     51200000
+pmr_deallocate<policy_malloc, 8>/threads:16           2.94 ns         38.1 ns     16000000
+
+pmr_deallocate<policy_malloc, 32>/threads:1           18.0 ns         16.7 ns     45875200
+pmr_deallocate<policy_malloc, 32>/threads:2           8.76 ns         19.9 ns     47157894
+pmr_deallocate<policy_malloc, 32>/threads:4           4.50 ns         14.6 ns     44800000
+pmr_deallocate<policy_malloc, 32>/threads:8           2.70 ns         16.7 ns     59733336
+pmr_deallocate<policy_malloc, 32>/threads:16          2.30 ns         36.6 ns     23893328
+
+pmr_deallocate<policy_malloc, 128>/threads:1          17.9 ns         16.3 ns     34461538
+pmr_deallocate<policy_malloc, 128>/threads:2          8.29 ns         21.0 ns     66901334
+pmr_deallocate<policy_malloc, 128>/threads:4          4.40 ns         14.5 ns     40000000
+pmr_deallocate<policy_malloc, 128>/threads:8          2.65 ns         20.1 ns     80000000
+pmr_deallocate<policy_malloc, 128>/threads:16         2.95 ns         40.5 ns     24717248
+
+pmr_deallocate<policy_malloc, 1024>/threads:1         19.0 ns         20.4 ns     34461538
+pmr_deallocate<policy_malloc, 1024>/threads:2         8.62 ns         19.7 ns     38956522
+pmr_deallocate<policy_malloc, 1024>/threads:4         4.70 ns         11.7 ns     64000000
+pmr_deallocate<policy_malloc, 1024>/threads:8         2.80 ns         16.0 ns     80000000
+pmr_deallocate<policy_malloc, 1024>/threads:16        2.45 ns         26.1 ns     27569232
+------------------------------------------------------------------------------------------
+Benchmark                                                Time             CPU   Iterations
+------------------------------------------------------------------------------------------
+pmr_allocate<policy_cpp_new, 8>/threads:1             69.5 ns         78.5 ns      8960000
+pmr_allocate<policy_cpp_new, 8>/threads:2             24.0 ns         40.1 ns     17920000
+pmr_allocate<policy_cpp_new, 8>/threads:4             10.4 ns         37.1 ns     29866668
+pmr_allocate<policy_cpp_new, 8>/threads:8             5.39 ns         42.2 ns     21082352
+pmr_allocate<policy_cpp_new, 8>/threads:16            3.40 ns         45.9 ns     16000000
+
+pmr_allocate<policy_cpp_new, 32>/threads:1            29.4 ns         29.5 ns     34461538
+pmr_allocate<policy_cpp_new, 32>/threads:2            24.8 ns         43.9 ns     14933334
+pmr_allocate<policy_cpp_new, 32>/threads:4            11.5 ns         45.1 ns     16290908
+pmr_allocate<policy_cpp_new, 32>/threads:8            5.26 ns         34.8 ns     25600000
+pmr_allocate<policy_cpp_new, 32>/threads:16           5.82 ns         90.7 ns      5513840
+
+pmr_allocate<policy_cpp_new, 128>/threads:1           74.0 ns         66.3 ns      8960000
+pmr_allocate<policy_cpp_new, 128>/threads:2           37.7 ns         80.6 ns     14933334
+pmr_allocate<policy_cpp_new, 128>/threads:4           15.1 ns         52.1 ns     13784616
+pmr_allocate<policy_cpp_new, 128>/threads:8           9.84 ns         63.2 ns     12358624
+pmr_allocate<policy_cpp_new, 128>/threads:16          8.05 ns          110 ns     11946672
+
+pmr_allocate<policy_cpp_new, 1024>/threads:1          79.5 ns         82.8 ns     10000000
+pmr_allocate<policy_cpp_new, 1024>/threads:2          27.2 ns         59.6 ns     14933334
+pmr_allocate<policy_cpp_new, 1024>/threads:4          12.3 ns         37.5 ns     40000000
+pmr_allocate<policy_cpp_new, 1024>/threads:8          10.3 ns         29.8 ns     39822224
+pmr_allocate<policy_cpp_new, 1024>/threads:16         6.17 ns         39.1 ns     16000000
+------------------------------------------------------------------------------------------
+pmr_deallocate<policy_cpp_new, 8>/threads:1           17.9 ns         18.9 ns     50301754
+pmr_deallocate<policy_cpp_new, 8>/threads:2           8.73 ns         15.4 ns     51794580
+pmr_deallocate<policy_cpp_new, 8>/threads:4           4.26 ns         15.2 ns     40000000
+pmr_deallocate<policy_cpp_new, 8>/threads:8           2.46 ns         17.9 ns     71680000
+pmr_deallocate<policy_cpp_new, 8>/threads:16          2.20 ns         34.0 ns     27569232
+
+pmr_deallocate<policy_cpp_new, 32>/threads:1          16.1 ns         16.5 ns     56000000
+pmr_deallocate<policy_cpp_new, 32>/threads:2          8.84 ns         16.1 ns     68923076
+pmr_deallocate<policy_cpp_new, 32>/threads:4          4.48 ns         19.5 ns     44800000
+pmr_deallocate<policy_cpp_new, 32>/threads:8          2.65 ns         15.3 ns     35840000
+pmr_deallocate<policy_cpp_new, 32>/threads:16         2.20 ns         35.3 ns     23893328
+
+pmr_deallocate<policy_cpp_new, 128>/threads:1         18.3 ns         21.1 ns     40727273
+pmr_deallocate<policy_cpp_new, 128>/threads:2         8.83 ns         15.6 ns     38956522
+pmr_deallocate<policy_cpp_new, 128>/threads:4         4.51 ns         17.6 ns     40000000
+pmr_deallocate<policy_cpp_new, 128>/threads:8         2.93 ns         18.4 ns     39841984
+pmr_deallocate<policy_cpp_new, 128>/threads:16        2.85 ns         36.1 ns     16000000
+
+pmr_deallocate<policy_cpp_new, 1024>/threads:1        19.6 ns         16.0 ns     49777778
+pmr_deallocate<policy_cpp_new, 1024>/threads:2        8.90 ns         17.9 ns     43631304
+pmr_deallocate<policy_cpp_new, 1024>/threads:4        4.93 ns         13.7 ns     40000000
+pmr_deallocate<policy_cpp_new, 1024>/threads:8        2.72 ns         19.9 ns     80000000
+pmr_deallocate<policy_cpp_new, 1024>/threads:16       2.23 ns         29.0 ns     39822224
+------------------------------------------------------------------------------------------
+Benchmark                                                Time             CPU   Iterations
+------------------------------------------------------------------------------------------
+pmr_allocate<policy_pmr_new, 8>/threads:1             17.6 ns         18.8 ns     49777778
+pmr_allocate<policy_pmr_new, 8>/threads:2             9.16 ns         14.5 ns     34461538
+pmr_allocate<policy_pmr_new, 8>/threads:4             4.82 ns         18.8 ns     40000000
+pmr_allocate<policy_pmr_new, 8>/threads:8             2.73 ns         17.4 ns     71680000
+pmr_allocate<policy_pmr_new, 8>/threads:16            2.10 ns         34.1 ns     24717248
+
+pmr_allocate<policy_pmr_new, 32>/threads:1            17.5 ns         14.6 ns     44800000
+pmr_allocate<policy_pmr_new, 32>/threads:2            8.88 ns         16.0 ns     38956522
+pmr_allocate<policy_pmr_new, 32>/threads:4            4.71 ns         17.8 ns     44800000
+pmr_allocate<policy_pmr_new, 32>/threads:8            2.57 ns         16.7 ns     44800000
+pmr_allocate<policy_pmr_new, 32>/threads:16           2.08 ns         41.0 ns     16000000
+
+pmr_allocate<policy_pmr_new, 128>/threads:1           18.5 ns         14.4 ns     44600889
+pmr_allocate<policy_pmr_new, 128>/threads:2           10.7 ns         22.5 ns     38956522
+pmr_allocate<policy_pmr_new, 128>/threads:4           5.09 ns         21.3 ns     44800000
+pmr_allocate<policy_pmr_new, 128>/threads:8           2.78 ns         19.6 ns     59733336
+pmr_allocate<policy_pmr_new, 128>/threads:16          2.33 ns         28.8 ns     26548144
+
+pmr_allocate<policy_pmr_new, 1024>/threads:1          24.8 ns         27.9 ns     22400000
+pmr_allocate<policy_pmr_new, 1024>/threads:2          12.8 ns         24.0 ns     35840000
+pmr_allocate<policy_pmr_new, 1024>/threads:4          6.67 ns         26.5 ns     44800000
+pmr_allocate<policy_pmr_new, 1024>/threads:8          4.28 ns         28.3 ns     29866664
+pmr_allocate<policy_pmr_new, 1024>/threads:16         3.21 ns         41.0 ns     16000000
+------------------------------------------------------------------------------------------
+pmr_deallocate<policy_pmr_new, 8>/threads:1           17.1 ns         16.3 ns     47786667
+pmr_deallocate<policy_pmr_new, 8>/threads:2           8.89 ns         18.1 ns     34461538
+pmr_deallocate<policy_pmr_new, 8>/threads:4           4.50 ns         16.1 ns     35840000
+pmr_deallocate<policy_pmr_new, 8>/threads:8           2.77 ns         17.3 ns     59733336
+pmr_deallocate<policy_pmr_new, 8>/threads:16          1.98 ns         34.2 ns     16000000
+
+pmr_deallocate<policy_pmr_new, 32>/threads:1          17.1 ns         14.8 ns     49777778
+pmr_deallocate<policy_pmr_new, 32>/threads:2          8.70 ns         18.7 ns     56000000
+pmr_deallocate<policy_pmr_new, 32>/threads:4          4.58 ns         14.3 ns     44800000
+pmr_deallocate<policy_pmr_new, 32>/threads:8          2.72 ns         17.3 ns     89600000
+pmr_deallocate<policy_pmr_new, 32>/threads:16         2.04 ns         30.5 ns     25600000
+
+pmr_deallocate<policy_pmr_new, 128>/threads:1         17.2 ns         15.3 ns     44800000
+pmr_deallocate<policy_pmr_new, 128>/threads:2         8.67 ns         15.7 ns     52705882
+pmr_deallocate<policy_pmr_new, 128>/threads:4         4.67 ns         18.7 ns     35840000
+pmr_deallocate<policy_pmr_new, 128>/threads:8         2.76 ns         18.0 ns     39822224
+pmr_deallocate<policy_pmr_new, 128>/threads:16        2.04 ns         28.3 ns     27569232
+
+pmr_deallocate<policy_pmr_new, 1024>/threads:1        17.2 ns         21.5 ns     32000000
+pmr_deallocate<policy_pmr_new, 1024>/threads:2        8.74 ns         16.0 ns     38956522
+pmr_deallocate<policy_pmr_new, 1024>/threads:4        4.84 ns         16.7 ns     44800000
+pmr_deallocate<policy_pmr_new, 1024>/threads:8        2.73 ns         16.0 ns     44800000
+pmr_deallocate<policy_pmr_new, 1024>/threads:16       2.04 ns         37.1 ns     16000000
+*/
\ No newline at end of file
diff --git a/include/libimp/expected.h b/include/libimp/expected.h
index af2ee7d4..8ffbdff0 100644
--- a/include/libimp/expected.h
+++ b/include/libimp/expected.h
@@ -322,7 +322,7 @@ R or_else(E &&exp, F &&f) {
  */
 template <typename T, typename E>
 class expected : public detail_expected::storage<typename std::remove_cv<T>::type, E> {
- public:
+public:
   using value_type = typename std::remove_cv<T>::type;
   using error_type = E;
 
diff --git a/include/libpmr/def.h b/include/libpmr/def.h
index 3b8e1ddb..6e903e6d 100644
--- a/include/libpmr/def.h
+++ b/include/libpmr/def.h
@@ -8,8 +8,6 @@
 
 #include <cstddef>
 
-#include "libimp/aligned.h"
-
 #define LIBPMR                pmr
 #define LIBPMR_NAMESPACE_BEG_ namespace LIBPMR {
 #define LIBPMR_NAMESPACE_END_ }
@@ -20,7 +18,6 @@ LIBPMR_NAMESPACE_BEG_
 
 enum : std::size_t {
   central_cache_default_size = 1024 * 1024, ///< 1MB
-  regular_head_size          = ::LIBIMP::round_up(sizeof(std::size_t), alignof(std::max_align_t)),
 };
 
 LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/new.h b/include/libpmr/new.h
index 6973ce09..bcf0c8cd 100644
--- a/include/libpmr/new.h
+++ b/include/libpmr/new.h
@@ -7,7 +7,6 @@
 #pragma once
 
 #include <cstddef>
-#include <unordered_map>
 #include <algorithm>
 
 #include "libimp/aligned.h"
@@ -22,6 +21,18 @@
 
 LIBPMR_NAMESPACE_BEG_
 
+/// \brief Defines the memory block collector interface.
+class LIBIMP_EXPORT block_collector {
+public:
+  virtual ~block_collector() noexcept = default;
+  virtual void deallocate(void *p) noexcept = 0;
+};
+
+using get_block_collector_t = block_collector *(*)() noexcept;
+
+static constexpr std::size_t regular_head_size
+    = ::LIBIMP::round_up(sizeof(get_block_collector_t), alignof(std::max_align_t));
+
 /// \brief Select the incremental level based on the size.
 constexpr inline std::size_t regular_level(std::size_t s) noexcept {
   return (s <= 128  ) ? 0 :
@@ -32,52 +43,25 @@ constexpr inline std::size_t regular_level(std::size_t s) noexcept {
 
 /// \brief Calculates the appropriate memory block size based on the increment level and size.
 constexpr inline std::size_t regular_sizeof_impl(std::size_t l, std::size_t s) noexcept {
-  return (l == 0) ? std::max<std::size_t>(::LIBIMP::round_up<std::size_t>(s, 8), regular_head_size) :
+  return (l == 0) ? ::LIBIMP::round_up<std::size_t>(s, regular_head_size) :
          (l == 1) ? ::LIBIMP::round_up<std::size_t>(s, 128 ) :
          (l == 2) ? ::LIBIMP::round_up<std::size_t>(s, 1024) :
          (l == 3) ? ::LIBIMP::round_up<std::size_t>(s, 8192) : (std::numeric_limits<std::size_t>::max)();
 }
 
 /// \brief Calculates the appropriate memory block size based on the size.
-constexpr inline std::size_t regular_sizeof(std::size_t s) noexcept {
+constexpr inline std::size_t regular_sizeof_impl(std::size_t s) noexcept {
   return regular_sizeof_impl(regular_level(s), s);
 }
 
 /// \brief Calculates the appropriate memory block size based on the specific type.
 template <typename T>
 constexpr inline std::size_t regular_sizeof() noexcept {
-  return regular_sizeof(regular_head_size + sizeof(T));
+  return regular_sizeof_impl(regular_head_size + sizeof(T));
 }
 
-/// \brief Defines the memory block collector interface.
-class LIBIMP_EXPORT block_collector {
- public:
-  virtual ~block_collector() noexcept = default;
-  virtual void deallocate(void *p) noexcept = 0;
-};
-
-/// \brief Gets all block pools of the thread cache.
-LIBIMP_EXPORT auto get_thread_block_pool_map() noexcept
-  -> std::unordered_map<std::size_t, block_collector *> &;
-
 /// \brief Defines block pool memory resource based on block pool.
 template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
-class block_pool_resource;
-
-/// \brief Memory block collector of unknown size.
-/// \note This memory resource is only used to temporarily collect memory blocks 
-///       that cannot find a suitable block pool memory resource.
-template <>
-class block_pool_resource<0, 0> : public block_pool<0, 0>
-                                , public block_collector {
-public:
-  void deallocate(void *p) noexcept override {
-    block_pool<0, 0>::deallocate(p);
-  }
-};
-
-/// \brief A block pool memory resource for a block of memory of a specific size.
-template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
 class block_pool_resource : public block_pool<BlockSize, BlockPoolExpansion>
                           , public block_collector {
 
@@ -88,99 +72,59 @@ class block_pool_resource : public block_pool<BlockSize, BlockPoolExpansion>
   }
 
 public:
-  static block_pool_resource *get() noexcept;
+  static block_collector *get() noexcept {
+    thread_local block_pool_resource instance;
+    return &instance;
+  }
 
   using base_t::base_t;
 
   void *allocate(std::size_t /*bytes*/, std::size_t /*alignment*/ = alignof(std::max_align_t)) noexcept {
     void *p = base_t::allocate();
-    p = ::LIBIMP::construct<std::size_t>(p, BlockSize);
-    return reinterpret_cast<::LIBIMP::byte *>(p) + regular_head_size;
+    *static_cast<get_block_collector_t *>(p) = get;
+    return static_cast<::LIBIMP::byte *>(p) + regular_head_size;
   }
 
   void deallocate(void *p, std::size_t /*bytes*/, std::size_t /*alignment*/ = alignof(std::max_align_t)) noexcept {
-    p = reinterpret_cast<::LIBIMP::byte *>(p) - regular_head_size;
-    auto r_size = *static_cast<std::size_t *>(p);
-    if (r_size <= BlockSize) {
+    p = static_cast<::LIBIMP::byte *>(p) - regular_head_size;
+    auto g = *static_cast<get_block_collector_t *>(p);
+    if (g == get) {
       base_t::deallocate(p);
       return;
     }
-    // When the actual size exceeds the current memory block size, 
-    // try to find a suitable pool among all memory block pools for this thread.
-    auto &map = get_thread_block_pool_map();
-    auto it = map.find(r_size);
-    if ((it == map.end()) || (it->second == nullptr)) {
-      block_pool_resource<0, 0> *bp = nullptr;
-      LIBIMP_TRY {
-        // If the corresponding memory resource cannot be found, 
-        // create a temporary general-purpose block pool to deallocate memory.
-        it = map.emplace(r_size, bp = new block_pool_resource<0, 0>).first;
-      } LIBIMP_CATCH(...) {
-        // If the memory resource cannot be created, 
-        // store the pointer directly to avoid leakage.
-        delete bp;
-        base_t::deallocate(p);
-        return;
-      }
-    }
-    it->second->deallocate(p);
+    g()->deallocate(p);
   }
 };
 
-template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
-auto block_pool_resource<BlockSize, BlockPoolExpansion>::get() noexcept
-  -> block_pool_resource<BlockSize, BlockPoolExpansion> * {
-  thread_local block_pool_resource *pi = nullptr;
-  if (pi != nullptr) {
-    return pi;
-  }
-  // Create a new block pool resource for this thread.
-  auto &map = get_thread_block_pool_map();
-  auto it = map.find(BlockSize);
-  if ((it != map.end()) && (it->second != nullptr)) {
-    // If there are existing block pool resources in the thread cache, 
-    // a new block pool resource is constructed based on it and the cache is updated.
-    auto *bp = static_cast <block_pool<0, 0> *>(
-               dynamic_cast<block_pool_resource<0, 0> *>(it->second));
-    if (bp == nullptr) {
-      return nullptr;
-    }
-    thread_local block_pool_resource instance(std::move(*bp));
-    delete static_cast<block_pool_resource<0, 0> *>(bp);
-    it->second = pi = &instance;
-    return pi;
-  } else {
-    // If there are no existing block pool resources in the thread cache, 
-    // the thread local storage instance is constructed and the pointer is cached.
-    thread_local block_pool_resource instance;
-    LIBIMP_TRY {
-      map.emplace(BlockSize, pi = &instance);
-      return pi;
-    } LIBIMP_CATCH(...) {
-      return nullptr;
-    }
-  }
-}
+/// \brief Different increment levels match different chunk sizes.
+///        512 means that 512 consecutive memory blocks are allocated at a time, and the block size is N.
+template <std::size_t L>
+constexpr static std::size_t block_pool_expansion = 0;
+
+template <> constexpr static std::size_t block_pool_expansion<0> = 512;
+template <> constexpr static std::size_t block_pool_expansion<1> = 256;
+template <> constexpr static std::size_t block_pool_expansion<2> = 128;
+template <> constexpr static std::size_t block_pool_expansion<3> = 64;
 
-/// \brief Match the appropriate memory block resources 
-///        according to the size of the specification.
+/// \brief Match the appropriate memory block resources according to the size of the specification.
 template <std::size_t N, std::size_t L = regular_level(N)>
-class regular_resource : public new_delete_resource {};
+struct regular_resource {
+  static auto *get() noexcept {
+    using block_poll_resource_t = block_pool_resource<N, block_pool_expansion<L>>;
+    return dynamic_cast<block_poll_resource_t *>(block_poll_resource_t::get());
+  }
+};
 
-/// \brief Different increment levels match different chunk sizes.
-///        512 means that 512 consecutive memory blocks are allocated at a time, and the block size is N.
-template <std::size_t N> class regular_resource<N, 0> : public block_pool_resource<N, 512> {};
-template <std::size_t N> class regular_resource<N, 1> : public block_pool_resource<N, 256> {};
-template <std::size_t N> class regular_resource<N, 2> : public block_pool_resource<N, 128> {};
-template <std::size_t N> class regular_resource<N, 3> : public block_pool_resource<N, 64 > {};
+template <std::size_t N>
+struct regular_resource<N, 4> : new_delete_resource {};
 
 /// \brief Creates an object based on the specified type and parameters with block pool resource.
 /// \note This function is thread-safe.
 template <typename T, typename... A>
 T *new$(A &&... args) noexcept {
-  auto *mem_res = regular_resource<regular_sizeof<T>()>::get();
-  if (mem_res == nullptr) return nullptr;
-  return ::LIBIMP::construct<T>(mem_res->allocate(sizeof(T), alignof(T)), std::forward<A>(args)...);
+  auto *res = regular_resource<regular_sizeof<T>()>::get();
+  if (res == nullptr) return nullptr;
+  return ::LIBIMP::construct<T>(res->allocate(sizeof(T), alignof(T)), std::forward<A>(args)...);
 }
 
 /// \brief Destroys object previously allocated by the `new$` and releases obtained memory area.
@@ -190,13 +134,13 @@ template <typename T>
 void delete$(T *p) noexcept {
   if (p == nullptr) return;
   ::LIBIMP::destroy(p);
-  auto *mem_res = regular_resource<regular_sizeof<T>()>::get();
-  if (mem_res == nullptr) return;
+  auto *res = regular_resource<regular_sizeof<T>()>::get();
+  if (res == nullptr) return;
 #if defined(LIBIMP_CC_MSVC_2015)
   // `alignof` of vs2015 requires that type must be able to be instantiated.
-  mem_res->deallocate(p, sizeof(T));
+  res->deallocate(p, sizeof(T));
 #else
-  mem_res->deallocate(p, sizeof(T), alignof(T));
+  res->deallocate(p, sizeof(T), alignof(T));
 #endif
 }
 
diff --git a/src/libpmr/block_pool.cpp b/src/libpmr/block_pool.cpp
index 47893c67..94fa2637 100644
--- a/src/libpmr/block_pool.cpp
+++ b/src/libpmr/block_pool.cpp
@@ -1,13 +1,41 @@
 
+#include <mutex>
+
+#include "libimp/detect_plat.h"
+
 #include "libpmr/block_pool.h"
 #include "libpmr/monotonic_buffer_resource.h"
 
 LIBPMR_NAMESPACE_BEG_
 
+class thread_safe_resource : public monotonic_buffer_resource {
+public:
+  thread_safe_resource(::LIBIMP::span<::LIBIMP::byte> buffer) noexcept
+      : monotonic_buffer_resource(buffer) {}
+
+  ~thread_safe_resource() noexcept {
+    LIBIMP_UNUSED std::lock_guard<std::mutex> lock(mutex_);
+    monotonic_buffer_resource::release();
+  }
+
+  void *allocate(std::size_t bytes, std::size_t alignment) noexcept {
+    LIBIMP_UNUSED std::lock_guard<std::mutex> lock(mutex_);
+    return monotonic_buffer_resource::allocate(bytes, alignment);
+  }
+
+  void deallocate(void *p, std::size_t bytes, std::size_t alignment) noexcept {
+    LIBIMP_UNUSED std::lock_guard<std::mutex> lock(mutex_);
+    monotonic_buffer_resource::deallocate(p, bytes, alignment);
+  }
+
+private:
+  std::mutex mutex_;
+};
+
 allocator &central_cache_allocator() noexcept {
-  static std::array<::LIBIMP::byte, central_cache_default_size> buffer;
-  static monotonic_buffer_resource mr(buffer);
-  static allocator a(&mr);
+  static std::array<::LIBIMP::byte, central_cache_default_size> buf;
+  static thread_safe_resource res(buf);
+  static allocator a(&res);
   return a;
 }
 
diff --git a/src/libpmr/new.cpp b/src/libpmr/new.cpp
deleted file mode 100644
index db9c1aa7..00000000
--- a/src/libpmr/new.cpp
+++ /dev/null
@@ -1,12 +0,0 @@
-
-#include "libpmr/new.h"
-
-LIBPMR_NAMESPACE_BEG_
-
-auto get_thread_block_pool_map() noexcept 
-  -> std::unordered_map<std::size_t, block_collector *> & {
-  thread_local std::unordered_map<std::size_t, block_collector *> instances;
-  return instances;
-}
-
-LIBPMR_NAMESPACE_END_
diff --git a/test/pmr/test_pmr_new.cpp b/test/pmr/test_pmr_new.cpp
index fbf9aa5e..5a2ba3eb 100644
--- a/test/pmr/test_pmr_new.cpp
+++ b/test/pmr/test_pmr_new.cpp
@@ -3,6 +3,7 @@
 #include <array>
 #include <cstring>
 #include <cstddef>
+#include <thread>
 
 #include "gtest/gtest.h"
 
@@ -114,3 +115,32 @@ TEST(pmr_new, delete$null) {
   pmr::delete$(p);
   SUCCEED();
 }
+
+TEST(pmr_new, multi_thread) {
+  std::array<std::thread, 16> threads;
+  for (auto &t : threads) {
+    t = std::thread([] {
+      for (int i = 0; i < 10000; ++i) {
+        auto p = pmr::new$<int>();
+        *p = i;
+        pmr::delete$(p);
+      }
+      std::array<void *, 10000> pts;
+      for (int i = 0; i < 10000; ++i) {
+        auto p = pmr::new$<std::array<char, 10>>();
+        pts[i] = p;
+        std::memset(p, i, sizeof(std::array<char, 10>));
+      }
+      for (int i = 0; i < 10000; ++i) {
+        std::array<char, 10> tmp;
+        std::memset(&tmp, i, sizeof(std::array<char, 10>));
+        ASSERT_EQ(std::memcmp(pts[i], &tmp, sizeof(std::array<char, 10>)), 0);
+        pmr::delete$(static_cast<std::array<char, 10> *>(pts[i]));
+      }
+    });
+  }
+  for (auto &t : threads) {
+    t.join();
+  }
+  SUCCEED();
+}

From 174d5e41df6bff08eb70409896e5798c1ac17270 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 9 Mar 2024 19:54:18 +0800
Subject: [PATCH 243/272] Fixed possible errors in memory allocation greater
 than 64K.

---
 include/libimp/detect_plat.h |  1 +
 include/libpmr/new.h         | 57 ++++++++++++++++++++++++------------
 test/pmr/test_pmr_new.cpp    | 23 +++++++++++++++
 3 files changed, 63 insertions(+), 18 deletions(-)

diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
index a38dac2a..26e8c18b 100644
--- a/include/libimp/detect_plat.h
+++ b/include/libimp/detect_plat.h
@@ -42,6 +42,7 @@
 # define LIBIMP_CC_MSVC_2015 1900
 # define LIBIMP_CC_MSVC_2017 1910
 # define LIBIMP_CC_MSVC_2019 1920
+# define LIBIMP_CC_MSVC_2022 1930
 #elif defined(__GNUC__)
 # define LIBIMP_CC_GNUC __GNUC__
 # if defined(__clang__)
diff --git a/include/libpmr/new.h b/include/libpmr/new.h
index bcf0c8cd..46e3b932 100644
--- a/include/libpmr/new.h
+++ b/include/libpmr/new.h
@@ -25,7 +25,7 @@ LIBPMR_NAMESPACE_BEG_
 class LIBIMP_EXPORT block_collector {
 public:
   virtual ~block_collector() noexcept = default;
-  virtual void deallocate(void *p) noexcept = 0;
+  virtual void recycle(void *p, std::size_t bytes, std::size_t alignment) noexcept = 0;
 };
 
 using get_block_collector_t = block_collector *(*)() noexcept;
@@ -60,15 +60,41 @@ constexpr inline std::size_t regular_sizeof() noexcept {
   return regular_sizeof_impl(regular_head_size + sizeof(T));
 }
 
+/// \brief Use block pools to handle memory less than 64K.
+template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
+class block_resource_base : public block_pool<BlockSize, BlockPoolExpansion> {
+public:
+  void *allocate(std::size_t /*bytes*/, std::size_t /*alignment*/) noexcept {
+    return block_pool<BlockSize, BlockPoolExpansion>::allocate();
+  }
+
+  void deallocate(void *p, std::size_t /*bytes*/, std::size_t /*alignment*/) noexcept {
+    block_pool<BlockSize, BlockPoolExpansion>::deallocate(p);
+  }
+};
+
+/// \brief Use `new`/`delete` to handle memory larger than 64K.
+template <std::size_t BlockSize>
+class block_resource_base<BlockSize, 0> : public new_delete_resource {
+public:
+  void *allocate(std::size_t bytes, std::size_t alignment) noexcept {
+    return new_delete_resource::allocate(regular_head_size + bytes, alignment);
+  }
+
+  void deallocate(void *p, std::size_t bytes, std::size_t alignment) noexcept {
+    new_delete_resource::deallocate(p, regular_head_size + bytes, alignment);
+  }
+};
+
 /// \brief Defines block pool memory resource based on block pool.
 template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
-class block_pool_resource : public block_pool<BlockSize, BlockPoolExpansion>
+class block_pool_resource : public block_resource_base<BlockSize, BlockPoolExpansion>
                           , public block_collector {
 
-  using base_t = block_pool<BlockSize, BlockPoolExpansion>;
+  using base_t = block_resource_base<BlockSize, BlockPoolExpansion>;
 
-  void deallocate(void *p) noexcept override {
-    base_t::deallocate(p);
+  void recycle(void *p, std::size_t bytes, std::size_t alignment) noexcept override {
+    base_t::deallocate(p, bytes, alignment);
   }
 
 public:
@@ -77,22 +103,20 @@ class block_pool_resource : public block_pool<BlockSize, BlockPoolExpansion>
     return &instance;
   }
 
-  using base_t::base_t;
-
-  void *allocate(std::size_t /*bytes*/, std::size_t /*alignment*/ = alignof(std::max_align_t)) noexcept {
-    void *p = base_t::allocate();
+  void *allocate(std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept {
+    void *p = base_t::allocate(bytes, alignment);
     *static_cast<get_block_collector_t *>(p) = get;
     return static_cast<::LIBIMP::byte *>(p) + regular_head_size;
   }
 
-  void deallocate(void *p, std::size_t /*bytes*/, std::size_t /*alignment*/ = alignof(std::max_align_t)) noexcept {
+  void deallocate(void *p, std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept {
     p = static_cast<::LIBIMP::byte *>(p) - regular_head_size;
     auto g = *static_cast<get_block_collector_t *>(p);
     if (g == get) {
-      base_t::deallocate(p);
+      base_t::deallocate(p, bytes, alignment);
       return;
     }
-    g()->deallocate(p);
+    g()->recycle(p, bytes, alignment);
   }
 };
 
@@ -115,9 +139,6 @@ struct regular_resource {
   }
 };
 
-template <std::size_t N>
-struct regular_resource<N, 4> : new_delete_resource {};
-
 /// \brief Creates an object based on the specified type and parameters with block pool resource.
 /// \note This function is thread-safe.
 template <typename T, typename... A>
@@ -136,11 +157,11 @@ void delete$(T *p) noexcept {
   ::LIBIMP::destroy(p);
   auto *res = regular_resource<regular_sizeof<T>()>::get();
   if (res == nullptr) return;
-#if defined(LIBIMP_CC_MSVC_2015)
+#if (LIBIMP_CC_MSVC > LIBIMP_CC_MSVC_2015)
+  res->deallocate(p, sizeof(T), alignof(T));
+#else
   // `alignof` of vs2015 requires that type must be able to be instantiated.
   res->deallocate(p, sizeof(T));
-#else
-  res->deallocate(p, sizeof(T), alignof(T));
 #endif
 }
 
diff --git a/test/pmr/test_pmr_new.cpp b/test/pmr/test_pmr_new.cpp
index 5a2ba3eb..dc8f569c 100644
--- a/test/pmr/test_pmr_new.cpp
+++ b/test/pmr/test_pmr_new.cpp
@@ -93,6 +93,14 @@ class Derived : public Base {
   int value_;
 };
 
+class Derived64K : public Derived {
+public:
+  using Derived::Derived;
+
+private:
+  std::array<char, 65536> padding_;
+};
+
 } // namespace
 
 TEST(pmr_new, delete$poly) {
@@ -110,6 +118,21 @@ TEST(pmr_new, delete$poly) {
   ASSERT_EQ(construct_count__, 0);
 }
 
+TEST(pmr_new, delete$poly64k) {
+  Base *p = pmr::new$<Derived64K>(-1);
+  ASSERT_NE(p, nullptr);
+  ASSERT_EQ(p->get(), -1);
+  ASSERT_EQ(construct_count__, -1);
+  pmr::delete$(p);
+  ASSERT_EQ(construct_count__, 0);
+
+  Base *q = pmr::new$<Derived64K>((std::numeric_limits<int>::max)());
+  ASSERT_EQ(q->get(), (std::numeric_limits<int>::max)());
+  ASSERT_EQ(construct_count__, (std::numeric_limits<int>::max)());
+  pmr::delete$(q);
+  ASSERT_EQ(construct_count__, 0);
+}
+
 TEST(pmr_new, delete$null) {
   Base *p = nullptr;
   pmr::delete$(p);

From 3f526cfbfb08ee9ff0a17ded7305d8066d52c00d Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 9 Mar 2024 20:15:50 +0800
Subject: [PATCH 244/272] Fix compilation errors

---
 include/libpmr/new.h | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/include/libpmr/new.h b/include/libpmr/new.h
index 46e3b932..a7bbdab3 100644
--- a/include/libpmr/new.h
+++ b/include/libpmr/new.h
@@ -28,7 +28,11 @@ class LIBIMP_EXPORT block_collector {
   virtual void recycle(void *p, std::size_t bytes, std::size_t alignment) noexcept = 0;
 };
 
+#if defined(LIBIMP_CPP_17)
 using get_block_collector_t = block_collector *(*)() noexcept;
+#else
+using get_block_collector_t = block_collector *(*)();
+#endif
 
 static constexpr std::size_t regular_head_size
     = ::LIBIMP::round_up(sizeof(get_block_collector_t), alignof(std::max_align_t));
@@ -123,12 +127,12 @@ class block_pool_resource : public block_resource_base<BlockSize, BlockPoolExpan
 /// \brief Different increment levels match different chunk sizes.
 ///        512 means that 512 consecutive memory blocks are allocated at a time, and the block size is N.
 template <std::size_t L>
-constexpr static std::size_t block_pool_expansion = 0;
+constexpr std::size_t block_pool_expansion = 0;
 
-template <> constexpr static std::size_t block_pool_expansion<0> = 512;
-template <> constexpr static std::size_t block_pool_expansion<1> = 256;
-template <> constexpr static std::size_t block_pool_expansion<2> = 128;
-template <> constexpr static std::size_t block_pool_expansion<3> = 64;
+template <> constexpr std::size_t block_pool_expansion<0> = 512;
+template <> constexpr std::size_t block_pool_expansion<1> = 256;
+template <> constexpr std::size_t block_pool_expansion<2> = 128;
+template <> constexpr std::size_t block_pool_expansion<3> = 64;
 
 /// \brief Match the appropriate memory block resources according to the size of the specification.
 template <std::size_t N, std::size_t L = regular_level(N)>

From a5456d925848dc77c8e737208f7a7b14a1e561a1 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 9 Mar 2024 21:04:21 +0800
Subject: [PATCH 245/272] Refactor regular_sizeof ut

---
 test/pmr/test_pmr_new.cpp | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/test/pmr/test_pmr_new.cpp b/test/pmr/test_pmr_new.cpp
index dc8f569c..50957511 100644
--- a/test/pmr/test_pmr_new.cpp
+++ b/test/pmr/test_pmr_new.cpp
@@ -10,13 +10,13 @@
 #include "libpmr/new.h"
 
 TEST(pmr_new, regular_sizeof) {
-  ASSERT_EQ(pmr::regular_sizeof<std::int8_t >(), pmr::regular_head_size + 8);
-  ASSERT_EQ(pmr::regular_sizeof<std::int16_t>(), pmr::regular_head_size + 8);
-  ASSERT_EQ(pmr::regular_sizeof<std::int32_t>(), pmr::regular_head_size + 8);
-  ASSERT_EQ(pmr::regular_sizeof<std::int64_t>(), pmr::regular_head_size + 8);
+  ASSERT_EQ(pmr::regular_sizeof<std::int8_t >(), pmr::regular_head_size + alignof(std::max_align_t));
+  ASSERT_EQ(pmr::regular_sizeof<std::int16_t>(), pmr::regular_head_size + alignof(std::max_align_t));
+  ASSERT_EQ(pmr::regular_sizeof<std::int32_t>(), pmr::regular_head_size + alignof(std::max_align_t));
+  ASSERT_EQ(pmr::regular_sizeof<std::int64_t>(), pmr::regular_head_size + alignof(std::max_align_t));
 
-  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 10    >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 10   , 8));
-  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 100   >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 100  , 8));
+  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 10    >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 10   , alignof(std::max_align_t)));
+  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 100   >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 100  , alignof(std::max_align_t)));
   ASSERT_EQ((pmr::regular_sizeof<std::array<char, 1000  >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 1000 , 128));
   ASSERT_EQ((pmr::regular_sizeof<std::array<char, 10000 >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 10000, 8192));
   ASSERT_EQ((pmr::regular_sizeof<std::array<char, 100000>>()), (std::numeric_limits<std::size_t>::max)());

From a0732c892caa835b2c5abcfd420ec58637a0717a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 9 Mar 2024 23:59:16 +0800
Subject: [PATCH 246/272] Refactor memory block resource retrieval in new.h

---
 include/libpmr/new.h | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/include/libpmr/new.h b/include/libpmr/new.h
index a7bbdab3..c160a51e 100644
--- a/include/libpmr/new.h
+++ b/include/libpmr/new.h
@@ -125,7 +125,7 @@ class block_pool_resource : public block_resource_base<BlockSize, BlockPoolExpan
 };
 
 /// \brief Different increment levels match different chunk sizes.
-///        512 means that 512 consecutive memory blocks are allocated at a time, and the block size is N.
+///        512 means that 512 consecutive memory blocks are allocated at a time.
 template <std::size_t L>
 constexpr std::size_t block_pool_expansion = 0;
 
@@ -134,20 +134,18 @@ template <> constexpr std::size_t block_pool_expansion<1> = 256;
 template <> constexpr std::size_t block_pool_expansion<2> = 128;
 template <> constexpr std::size_t block_pool_expansion<3> = 64;
 
-/// \brief Match the appropriate memory block resources according to the size of the specification.
-template <std::size_t N, std::size_t L = regular_level(N)>
-struct regular_resource {
-  static auto *get() noexcept {
-    using block_poll_resource_t = block_pool_resource<N, block_pool_expansion<L>>;
-    return dynamic_cast<block_poll_resource_t *>(block_poll_resource_t::get());
-  }
-};
+/// \brief Matches the appropriate memory block resource based on the specified type.
+template <typename T, std::size_t N = regular_sizeof<T>(), std::size_t L = regular_level(N)>
+auto *get_regular_resource() noexcept {
+  using block_poll_resource_t = block_pool_resource<N, block_pool_expansion<L>>;
+  return dynamic_cast<block_poll_resource_t *>(block_poll_resource_t::get());
+}
 
 /// \brief Creates an object based on the specified type and parameters with block pool resource.
 /// \note This function is thread-safe.
 template <typename T, typename... A>
 T *new$(A &&... args) noexcept {
-  auto *res = regular_resource<regular_sizeof<T>()>::get();
+  auto *res = get_regular_resource<T>();
   if (res == nullptr) return nullptr;
   return ::LIBIMP::construct<T>(res->allocate(sizeof(T), alignof(T)), std::forward<A>(args)...);
 }
@@ -159,7 +157,7 @@ template <typename T>
 void delete$(T *p) noexcept {
   if (p == nullptr) return;
   ::LIBIMP::destroy(p);
-  auto *res = regular_resource<regular_sizeof<T>()>::get();
+  auto *res = get_regular_resource<T>();
   if (res == nullptr) return;
 #if (LIBIMP_CC_MSVC > LIBIMP_CC_MSVC_2015)
   res->deallocate(p, sizeof(T), alignof(T));

From 9206e674c12e00f062fb9ee400d5bc6c1b2a58db Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 10 Mar 2024 00:11:18 +0800
Subject: [PATCH 247/272] Refactor naming convention in new and delete
 functions.

---
 benchmark/benchmark_new.cpp  |  4 +--
 include/libimp/detect_plat.h |  4 +--
 include/libimp/scope_exit.h  |  4 +--
 include/libpmr/new.h         |  8 +++---
 src/libimp/codecvt.cpp       |  6 ++---
 test/pmr/test_pmr_new.cpp    | 50 ++++++++++++++++++------------------
 6 files changed, 38 insertions(+), 38 deletions(-)

diff --git a/benchmark/benchmark_new.cpp b/benchmark/benchmark_new.cpp
index 7dc1c677..edef459e 100644
--- a/benchmark/benchmark_new.cpp
+++ b/benchmark/benchmark_new.cpp
@@ -106,11 +106,11 @@ struct policy_cpp_new {
 template <std::size_t AllocSize>
 struct policy_pmr_new {
   static void *allocate() noexcept {
-    return pmr::new$<std::array<char, AllocSize>>();
+    return pmr::$new<std::array<char, AllocSize>>();
   }
 
   static void deallocate(void *p) noexcept {
-    pmr::delete$(static_cast<std::array<char, AllocSize> *>(p));
+    pmr::$delete(static_cast<std::array<char, AllocSize> *>(p));
   }
 };
 
diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
index 26e8c18b..1bc12dca 100644
--- a/include/libimp/detect_plat.h
+++ b/include/libimp/detect_plat.h
@@ -211,9 +211,9 @@
     defined(__EXCEPTIONS) || defined(_CPPUNWIND)
 # define LIBIMP_TRY                    try
 # define LIBIMP_CATCH(...)             catch (__VA_ARGS__)
-# define LIBIMP_THROW($exception, ...) throw $exception
+# define LIBIMP_THROW($EXCEPTION, ...) throw $EXCEPTION
 #else
 # define LIBIMP_TRY                    if (true)
 # define LIBIMP_CATCH(...)             else if (false)
-# define LIBIMP_THROW($exception, ...) return __VA_ARGS__
+# define LIBIMP_THROW($EXCEPTION, ...) return __VA_ARGS__
 #endif
diff --git a/include/libimp/scope_exit.h b/include/libimp/scope_exit.h
index 382c44a6..7604311f 100644
--- a/include/libimp/scope_exit.h
+++ b/include/libimp/scope_exit.h
@@ -73,7 +73,7 @@ struct scope_exit_helper {
 
 } // namespace detail
 
-#define LIBIMP_SCOPE_EXIT($val) \
-  LIBIMP_UNUSED auto $val = ::LIBIMP::detail::scope_exit_helper{}
+#define LIBIMP_SCOPE_EXIT($VAL) \
+  LIBIMP_UNUSED auto $VAL = ::LIBIMP::detail::scope_exit_helper{}
 
 LIBIMP_NAMESPACE_END_
diff --git a/include/libpmr/new.h b/include/libpmr/new.h
index c160a51e..d3a70e12 100644
--- a/include/libpmr/new.h
+++ b/include/libpmr/new.h
@@ -144,17 +144,17 @@ auto *get_regular_resource() noexcept {
 /// \brief Creates an object based on the specified type and parameters with block pool resource.
 /// \note This function is thread-safe.
 template <typename T, typename... A>
-T *new$(A &&... args) noexcept {
+T *$new(A &&... args) noexcept {
   auto *res = get_regular_resource<T>();
   if (res == nullptr) return nullptr;
   return ::LIBIMP::construct<T>(res->allocate(sizeof(T), alignof(T)), std::forward<A>(args)...);
 }
 
-/// \brief Destroys object previously allocated by the `new$` and releases obtained memory area.
-/// \note This function is thread-safe. If the pointer type passed in is different from `new$`, 
+/// \brief Destroys object previously allocated by the `$new` and releases obtained memory area.
+/// \note This function is thread-safe. If the pointer type passed in is different from `$new`, 
 ///       additional performance penalties may be incurred.
 template <typename T>
-void delete$(T *p) noexcept {
+void $delete(T *p) noexcept {
   if (p == nullptr) return;
   ::LIBIMP::destroy(p);
   auto *res = get_regular_resource<T>();
diff --git a/src/libimp/codecvt.cpp b/src/libimp/codecvt.cpp
index 84d8a887..6de3e0ae 100644
--- a/src/libimp/codecvt.cpp
+++ b/src/libimp/codecvt.cpp
@@ -324,12 +324,12 @@ auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noex
 
 } // namespace
 
-#define LIBIMP_DEF_CVT_CSTR_($char_t, $char_u) \
+#define LIBIMP_DEF_CVT_CSTR_($CHAR_T, $CHAR_U) \
   template <> \
-  std::size_t cvt_cstr($char_t const *src, std::size_t slen, $char_u *des, std::size_t dlen) noexcept { \
+  std::size_t cvt_cstr($CHAR_T const *src, std::size_t slen, $CHAR_U *des, std::size_t dlen) noexcept { \
     return cvt_cstr_utf(src, slen, des, dlen); \
   }
-// #define LIBIMP_DEF_CVT_CSTR_($char_t, $char_u)
+// #define LIBIMP_DEF_CVT_CSTR_($CHAR_T, $CHAR_U)
 
 LIBIMP_DEF_CVT_CSTR_(char    , char)
 LIBIMP_DEF_CVT_CSTR_(char    , char16_t)
diff --git a/test/pmr/test_pmr_new.cpp b/test/pmr/test_pmr_new.cpp
index 50957511..e3b1c690 100644
--- a/test/pmr/test_pmr_new.cpp
+++ b/test/pmr/test_pmr_new.cpp
@@ -22,19 +22,19 @@ TEST(pmr_new, regular_sizeof) {
   ASSERT_EQ((pmr::regular_sizeof<std::array<char, 100000>>()), (std::numeric_limits<std::size_t>::max)());
 }
 
-TEST(pmr_new, new$) {
-  auto p = pmr::new$<int>();
+TEST(pmr_new, $new) {
+  auto p = pmr::$new<int>();
   ASSERT_NE(p, nullptr);
   *p = -1;
   ASSERT_EQ(*p, -1);
-  pmr::delete$(p);
+  pmr::$delete(p);
 }
 
-TEST(pmr_new, new$value) {
-  auto p = pmr::new$<int>((std::numeric_limits<int>::max)());
+TEST(pmr_new, $new_value) {
+  auto p = pmr::$new<int>((std::numeric_limits<int>::max)());
   ASSERT_NE(p, nullptr);
   ASSERT_EQ(*p, (std::numeric_limits<int>::max)());
-  pmr::delete$(p);
+  pmr::$delete(p);
 }
 
 namespace {
@@ -44,7 +44,7 @@ void test_new$array() {
   std::array<void *, Pts> pts;
   using T = std::array<char, N>;
   for (int i = 0; i < (int)pts.size(); ++i) {
-    auto p = pmr::new$<T>();
+    auto p = pmr::$new<T>();
     pts[i] = p;
     std::memset(p, i, sizeof(T));
   }
@@ -52,13 +52,13 @@ void test_new$array() {
     T tmp;
     std::memset(&tmp, i, sizeof(T));
     ASSERT_EQ(std::memcmp(pts[i], &tmp, sizeof(T)), 0);
-    pmr::delete$(static_cast<T *>(pts[i]));
+    pmr::$delete(static_cast<T *>(pts[i]));
   }
 }
 
 } // namespace
 
-TEST(pmr_new, new$array) {
+TEST(pmr_new, $new_array) {
   test_new$array<1000, 10>();
   test_new$array<1000, 100>();
   test_new$array<1000, 1000>();
@@ -103,39 +103,39 @@ class Derived64K : public Derived {
 
 } // namespace
 
-TEST(pmr_new, delete$poly) {
-  Base *p = pmr::new$<Derived>(-1);
+TEST(pmr_new, $delete_poly) {
+  Base *p = pmr::$new<Derived>(-1);
   ASSERT_NE(p, nullptr);
   ASSERT_EQ(p->get(), -1);
   ASSERT_EQ(construct_count__, -1);
-  pmr::delete$(p);
+  pmr::$delete(p);
   ASSERT_EQ(construct_count__, 0);
 
-  ASSERT_EQ(p, pmr::new$<Derived>((std::numeric_limits<int>::max)()));
+  ASSERT_EQ(p, pmr::$new<Derived>((std::numeric_limits<int>::max)()));
   ASSERT_EQ(p->get(), (std::numeric_limits<int>::max)());
   ASSERT_EQ(construct_count__, (std::numeric_limits<int>::max)());
-  pmr::delete$(p);
+  pmr::$delete(p);
   ASSERT_EQ(construct_count__, 0);
 }
 
-TEST(pmr_new, delete$poly64k) {
-  Base *p = pmr::new$<Derived64K>(-1);
+TEST(pmr_new, $delete_poly64k) {
+  Base *p = pmr::$new<Derived64K>(-1);
   ASSERT_NE(p, nullptr);
   ASSERT_EQ(p->get(), -1);
   ASSERT_EQ(construct_count__, -1);
-  pmr::delete$(p);
+  pmr::$delete(p);
   ASSERT_EQ(construct_count__, 0);
 
-  Base *q = pmr::new$<Derived64K>((std::numeric_limits<int>::max)());
+  Base *q = pmr::$new<Derived64K>((std::numeric_limits<int>::max)());
   ASSERT_EQ(q->get(), (std::numeric_limits<int>::max)());
   ASSERT_EQ(construct_count__, (std::numeric_limits<int>::max)());
-  pmr::delete$(q);
+  pmr::$delete(q);
   ASSERT_EQ(construct_count__, 0);
 }
 
-TEST(pmr_new, delete$null) {
+TEST(pmr_new, $delete_null) {
   Base *p = nullptr;
-  pmr::delete$(p);
+  pmr::$delete(p);
   SUCCEED();
 }
 
@@ -144,13 +144,13 @@ TEST(pmr_new, multi_thread) {
   for (auto &t : threads) {
     t = std::thread([] {
       for (int i = 0; i < 10000; ++i) {
-        auto p = pmr::new$<int>();
+        auto p = pmr::$new<int>();
         *p = i;
-        pmr::delete$(p);
+        pmr::$delete(p);
       }
       std::array<void *, 10000> pts;
       for (int i = 0; i < 10000; ++i) {
-        auto p = pmr::new$<std::array<char, 10>>();
+        auto p = pmr::$new<std::array<char, 10>>();
         pts[i] = p;
         std::memset(p, i, sizeof(std::array<char, 10>));
       }
@@ -158,7 +158,7 @@ TEST(pmr_new, multi_thread) {
         std::array<char, 10> tmp;
         std::memset(&tmp, i, sizeof(std::array<char, 10>));
         ASSERT_EQ(std::memcmp(pts[i], &tmp, sizeof(std::array<char, 10>)), 0);
-        pmr::delete$(static_cast<std::array<char, 10> *>(pts[i]));
+        pmr::$delete(static_cast<std::array<char, 10> *>(pts[i]));
       }
     });
   }

From d6f40f44d36c9b279a664cc583be8dd24009387e Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 10 Mar 2024 00:26:38 +0800
Subject: [PATCH 248/272] Refactor noexcept specifier for
 `monotonic_buffer_resource`

---
 include/libpmr/monotonic_buffer_resource.h |  8 ++---
 src/libpmr/monotonic_buffer_resource.cpp   | 40 ++++++++++++++--------
 2 files changed, 30 insertions(+), 18 deletions(-)

diff --git a/include/libpmr/monotonic_buffer_resource.h b/include/libpmr/monotonic_buffer_resource.h
index 6b0d4dfd..d2ffb5b1 100644
--- a/include/libpmr/monotonic_buffer_resource.h
+++ b/include/libpmr/monotonic_buffer_resource.h
@@ -42,18 +42,18 @@ class LIBIMP_EXPORT monotonic_buffer_resource {
 public:
   monotonic_buffer_resource() noexcept;
   explicit monotonic_buffer_resource(allocator upstream) noexcept;
-  explicit monotonic_buffer_resource(std::size_t initial_size);
-  monotonic_buffer_resource(std::size_t initial_size, allocator upstream);
+  explicit monotonic_buffer_resource(std::size_t initial_size) noexcept;
+  monotonic_buffer_resource(std::size_t initial_size, allocator upstream) noexcept;
   monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer) noexcept;
   monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer, allocator upstream) noexcept;
 
-  ~monotonic_buffer_resource();
+  ~monotonic_buffer_resource() noexcept;
 
   monotonic_buffer_resource(monotonic_buffer_resource const &) = delete;
   monotonic_buffer_resource &operator=(monotonic_buffer_resource const &) = delete;
 
   allocator upstream_resource() const noexcept;
-  void release();
+  void release() noexcept;
 
   void *allocate(std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
   void deallocate(void *p, std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
diff --git a/src/libpmr/monotonic_buffer_resource.cpp b/src/libpmr/monotonic_buffer_resource.cpp
index f43d7237..23810b65 100644
--- a/src/libpmr/monotonic_buffer_resource.cpp
+++ b/src/libpmr/monotonic_buffer_resource.cpp
@@ -5,6 +5,7 @@
 
 #include "libimp/log.h"
 #include "libimp/aligned.h"
+#include "libimp/detect_plat.h"
 
 #include "libpmr/monotonic_buffer_resource.h"
 
@@ -12,18 +13,24 @@ LIBPMR_NAMESPACE_BEG_
 namespace {
 
 template <typename Node>
-Node *make_node(allocator const &upstream, std::size_t initial_size, std::size_t alignment) {
+Node *make_node(allocator const &upstream, std::size_t initial_size, std::size_t alignment) noexcept {
   LIBIMP_LOG_();
   auto sz = ::LIBIMP::round_up(sizeof(Node), alignment) + initial_size;
-  auto *node = static_cast<Node *>(upstream.allocate(sz));
-  if (node == nullptr) {
+  LIBIMP_TRY {
+    auto *node = static_cast<Node *>(upstream.allocate(sz));
+    if (node == nullptr) {
+      log.error("failed: allocate memory for `monotonic_buffer_resource`'s node.", 
+                " bytes = ", initial_size, ", alignment = ", alignment);
+      return nullptr;
+    }
+    node->next = nullptr;
+    node->size = sz;
+    return node;
+  } LIBIMP_CATCH(...) {
     log.error("failed: allocate memory for `monotonic_buffer_resource`'s node.", 
               " bytes = ", initial_size, ", alignment = ", alignment);
     return nullptr;
   }
-  node->next = nullptr;
-  node->size = sz;
-  return node;
 }
 
 std::size_t next_buffer_size(std::size_t size) noexcept {
@@ -38,10 +45,10 @@ monotonic_buffer_resource::monotonic_buffer_resource() noexcept
 monotonic_buffer_resource::monotonic_buffer_resource(allocator upstream) noexcept
   : monotonic_buffer_resource(0, std::move(upstream)) {}
 
-monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size)
+monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size) noexcept
   : monotonic_buffer_resource(initial_size, allocator{}) {}
 
-monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size, allocator upstream)
+monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size, allocator upstream) noexcept
   : upstream_      (std::move(upstream))
   , free_list_     (nullptr)
   , head_          (nullptr)
@@ -62,7 +69,7 @@ monotonic_buffer_resource::monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::by
   , initial_buffer_(buffer.begin())
   , initial_size_  (buffer.size()) {}
 
-monotonic_buffer_resource::~monotonic_buffer_resource() {
+monotonic_buffer_resource::~monotonic_buffer_resource() noexcept {
   release();
 }
 
@@ -70,11 +77,16 @@ allocator monotonic_buffer_resource::upstream_resource() const noexcept {
   return upstream_;
 }
 
-void monotonic_buffer_resource::release() {
-  while (free_list_ != nullptr) {
-    auto *next = free_list_->next;
-    upstream_.deallocate(free_list_, free_list_->size);
-    free_list_ = next;
+void monotonic_buffer_resource::release() noexcept {
+  LIBIMP_LOG_();
+  LIBIMP_TRY {
+    while (free_list_ != nullptr) {
+      auto *next = free_list_->next;
+      upstream_.deallocate(free_list_, free_list_->size);
+      free_list_ = next;
+    }
+  } LIBIMP_CATCH(...) {
+    log.error("failed: deallocate memory for `monotonic_buffer_resource`.");
   }
   // reset to initial state at contruction
   if ((head_ = initial_buffer_) != nullptr) {

From 1407d1815e287d448da3b98c9eb3bdbaab8a2dde Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 10 Mar 2024 00:49:24 +0800
Subject: [PATCH 249/272] Refactor logging functions and add exception handling

---
 include/libimp/log.h | 45 +++++++++++++++++++++++++++++---------------
 1 file changed, 30 insertions(+), 15 deletions(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index 0efeeecc..42909f11 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -53,33 +53,30 @@ bool unfold_tuple_fmt_to(fmt_context &ctx, Tp const &tp, std::index_sequence<I..
 } // namespace detail
 
 template <typename... T>
-bool context_to_string(fmt_context &f_ctx, context<T...> const &l_ctx) noexcept {
+bool context_to_string(fmt_context &f_ctx, context<T...> const &l_ctx) {
   static constexpr char types[] = {
     'T', 'D', 'I', 'W', 'E', 'F',
   };
-  LIBIMP_TRY {
-    auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(l_ctx.tp).time_since_epoch().count() % 1000;
-    return detail::unfold_tuple_fmt_to(f_ctx, l_ctx.params, std::index_sequence_for<T...>{},
-                                      "[", types[underlyof(l_ctx.level)], "]"
-                                      "[", l_ctx.tp, ".", spec("03")(ms), "]"
-                                      "[", l_ctx.func, "] ");
-  } LIBIMP_CATCH(...) {
-    return false;
-  }
+  auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(l_ctx.tp).time_since_epoch().count() % 1000;
+  return detail::unfold_tuple_fmt_to(f_ctx, l_ctx.params, std::index_sequence_for<T...>{},
+                                    "[", types[underlyof(l_ctx.level)], "]"
+                                    "[", l_ctx.tp, ".", spec("03")(ms), "]"
+                                    "[", l_ctx.func, "] ");
 }
 
 template <typename... T>
-std::string context_to_string(context<T...> const &l_ctx) noexcept {
+std::string context_to_string(context<T...> const &l_ctx) {
+  std::string log_txt;
+  fmt_context f_ctx(log_txt);
   LIBIMP_TRY {
-    std::string log_txt;
-    fmt_context f_ctx(log_txt);
     if (!context_to_string(f_ctx, l_ctx)) {
       return {};
     }
     f_ctx.finish();
     return log_txt;
   } LIBIMP_CATCH(...) {
-    return {};
+    f_ctx.finish();
+    throw;
   }
 }
 
@@ -105,6 +102,22 @@ inline auto &make_std_out() noexcept {
   return std_out;
 }
 
+/// \brief Record the last information when an exception occurs.
+inline void log_exception(char const *func, std::exception_ptr eptr) noexcept {
+  LIBIMP_TRY {
+    if (func == nullptr) {
+      func = "-";
+    }
+    if (eptr) {
+      std::rethrow_exception(eptr);
+    }
+  } LIBIMP_CATCH(std::exception const &e) {
+    std::fprintf(stderr, "[F][%s] exception: %s\n", func, e.what());
+  } LIBIMP_CATCH(...) {
+    std::fprintf(stderr, "[F][%s] exception: unknown\n", func);
+  }
+}
+
 /**
  * \brief Log information base class.
  */
@@ -141,7 +154,9 @@ class logger : public logger_base {
         l, std::chrono::system_clock::now(), func_,
         std::forward_as_tuple(std::forward<A>(args)...),
       });
-    } LIBIMP_CATCH(...) {}
+    } LIBIMP_CATCH(...) {
+      log_exception(func_, std::current_exception());
+    }
     return *this;
   }
 

From 9f44298350f02568c1b0961da7e833889c0e302e Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 10 Mar 2024 13:38:28 +0800
Subject: [PATCH 250/272] Fix exception handling and logging in the code

---
 include/libconcur/element.h              |  5 ++---
 include/libimp/log.h                     | 22 ++++++++++++++--------
 src/libimp/platform/win/system.h         |  5 +++--
 src/libpmr/monotonic_buffer_resource.cpp |  6 ++++--
 4 files changed, 23 insertions(+), 15 deletions(-)

diff --git a/include/libconcur/element.h b/include/libconcur/element.h
index 7c816eca..b50c7cf3 100644
--- a/include/libconcur/element.h
+++ b/include/libconcur/element.h
@@ -74,10 +74,9 @@ class element {
     LIBIMP_LOG_();
     LIBIMP_TRY {
       data_ = std::forward<U>(src);
-    } LIBIMP_CATCH(std::exception const &e) {
-      log.error("failed: `data = std::forward<U>(src)`. error = ", e.what());
     } LIBIMP_CATCH(...) {
-      log.error("failed: `data = std::forward<U>(src)`. error = unknown");
+      log.error("failed: `data = std::forward<U>(src)`.",
+                "\n\texception: ", ::LIBIMP::log::exception_string(std::current_exception()));
     }
   }
 
diff --git a/include/libimp/log.h b/include/libimp/log.h
index 42909f11..b1650af9 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -102,20 +102,26 @@ inline auto &make_std_out() noexcept {
   return std_out;
 }
 
-/// \brief Record the last information when an exception occurs.
-inline void log_exception(char const *func, std::exception_ptr eptr) noexcept {
+/// \brief Get the exception information.
+inline char const *exception_string(std::exception_ptr eptr) noexcept {
   LIBIMP_TRY {
-    if (func == nullptr) {
-      func = "-";
-    }
     if (eptr) {
       std::rethrow_exception(eptr);
     }
   } LIBIMP_CATCH(std::exception const &e) {
-    std::fprintf(stderr, "[F][%s] exception: %s\n", func, e.what());
+    return e.what();
   } LIBIMP_CATCH(...) {
-    std::fprintf(stderr, "[F][%s] exception: unknown\n", func);
+    return "unknown";
+  }
+  return "none";
+}
+
+/// \brief Record the last information when an exception occurs.
+inline void exception_print(char const *func, std::exception_ptr eptr) noexcept {
+  if (func == nullptr) {
+    func = "-";
   }
+  std::fprintf(stderr, "[F][%s] exception: %s\n", func, exception_string(eptr));
 }
 
 /**
@@ -155,7 +161,7 @@ class logger : public logger_base {
         std::forward_as_tuple(std::forward<A>(args)...),
       });
     } LIBIMP_CATCH(...) {
-      log_exception(func_, std::current_exception());
+      exception_print(func_, std::current_exception());
     }
     return *this;
   }
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index c1f01fc7..f0a63996 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -49,8 +49,9 @@ std::string error_string(DWORD code) noexcept {
     std::string ret(len, '\0');
     cvt_cstr(lpErrText, msg_len, &ret[0], ret.size());
     return ret;
-  } LIBIMP_CATCH(std::exception const &e) {
-    log.failed(e.what());
+  } LIBIMP_CATCH(...) {
+    log.error("failed: FormatMessage(dwMessageId = ", code, ").",
+              "\n\texception: ", ::LIBIMP::log::exception_string(std::current_exception()));
   }
   return {};
 }
diff --git a/src/libpmr/monotonic_buffer_resource.cpp b/src/libpmr/monotonic_buffer_resource.cpp
index 23810b65..72be867c 100644
--- a/src/libpmr/monotonic_buffer_resource.cpp
+++ b/src/libpmr/monotonic_buffer_resource.cpp
@@ -28,7 +28,8 @@ Node *make_node(allocator const &upstream, std::size_t initial_size, std::size_t
     return node;
   } LIBIMP_CATCH(...) {
     log.error("failed: allocate memory for `monotonic_buffer_resource`'s node.", 
-              " bytes = ", initial_size, ", alignment = ", alignment);
+              " bytes = ", initial_size, ", alignment = ", alignment,
+              "\n\texception: ", ::LIBIMP::log::exception_string(std::current_exception()));
     return nullptr;
   }
 }
@@ -86,7 +87,8 @@ void monotonic_buffer_resource::release() noexcept {
       free_list_ = next;
     }
   } LIBIMP_CATCH(...) {
-    log.error("failed: deallocate memory for `monotonic_buffer_resource`.");
+    log.error("failed: deallocate memory for `monotonic_buffer_resource`.",
+              "\n\texception: ", ::LIBIMP::log::exception_string(std::current_exception()));
   }
   // reset to initial state at contruction
   if ((head_ = initial_buffer_) != nullptr) {

From a401d3f87447d5b3b83317948a45904235ae0436 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 19 May 2024 18:49:50 +0800
Subject: [PATCH 251/272] Use `std::ignore` to fix unused variable warnings

---
 benchmark/benchmark_concur.cpp | 11 ++++++-----
 include/libconcur/data_model.h |  9 +++++----
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/benchmark/benchmark_concur.cpp b/benchmark/benchmark_concur.cpp
index 046510a7..dc388337 100644
--- a/benchmark/benchmark_concur.cpp
+++ b/benchmark/benchmark_concur.cpp
@@ -3,6 +3,7 @@
 #include <future>
 #include <atomic>
 #include <vector>
+#include <tuple>
 
 #include "benchmark/benchmark.h"
 
@@ -18,18 +19,18 @@ void concur_queue_rtt(benchmark::State &state) {
     for (std::int64_t i = 0; !stop.load(std::memory_order_relaxed); ++i) {
       std::int64_t n {};
       while (!que[0].pop(n)) ;
-      (void)que[1].push(i);
+      std::ignore = que[1].push(i);
     }
   });
 
   for (auto _ : state) {
-    (void)que[0].push(0);
+    std::ignore = que[0].push(0);
     std::int64_t n {};
     while (!que[1].pop(n)) ;
   }
 
   stop = true;
-  (void)que[0].push(0);
+  std::ignore = que[0].push(0);
   producer.wait();
 }
 
@@ -39,7 +40,7 @@ void concur_queue_1v1(benchmark::State &state) {
   std::atomic_bool stop = false;
   auto producer = std::async(std::launch::async, [&stop, &que] {
     for (std::int64_t i = 0; !stop.load(std::memory_order_relaxed); ++i) {
-      (void)que.push(i);
+      std::ignore = que.push(i);
       std::this_thread::yield();
     }
   });
@@ -65,7 +66,7 @@ void concur_queue_NvN(benchmark::State &state) {
     prods.resize(state.threads());
     auto producer = [] {
       for (std::int64_t i = 0; run.load(std::memory_order_relaxed) > 0; ++i) {
-        (void)que.push(i);
+        std::ignore = que.push(i);
         std::this_thread::yield();
       }
     };
diff --git a/include/libconcur/data_model.h b/include/libconcur/data_model.h
index e6865d4c..9805ba8d 100644
--- a/include/libconcur/data_model.h
+++ b/include/libconcur/data_model.h
@@ -8,6 +8,7 @@
 
 #include <atomic>
 #include <array>
+#include <tuple>
 #include <cstddef>
 #include <cstdint>
 
@@ -46,11 +47,11 @@ class data_model {
       typename decltype(elements)::size_type i = 0;
       LIBIMP_TRY {
         for (; i < elements.size(); ++i) {
-          (void)::LIBIMP::construct<element<value_type>>(&elements[i]);
+          std::ignore = ::LIBIMP::construct<element<value_type>>(&elements[i]);
         }
       } LIBIMP_CATCH(...) {
         for (decltype(i) k = 0; k < i; ++k) {
-          (void)::LIBIMP::destroy<element<value_type>>(&elements[k]);
+          std::ignore = ::LIBIMP::destroy<element<value_type>>(&elements[k]);
         }
         throw;
       }
@@ -58,7 +59,7 @@ class data_model {
 
     ~data() noexcept {
       for (auto &elem : this->elements()) {
-        (void)::LIBIMP::destroy<element<value_type>>(&elem);
+        std::ignore = ::LIBIMP::destroy<element<value_type>>(&elem);
       }
     }
 
@@ -124,7 +125,7 @@ class data_model {
   ~data_model() noexcept {
     if (valid()) {
       auto sz = data_->byte_size();
-      (void)::LIBIMP::destroy<data>(data_);
+      std::ignore = ::LIBIMP::destroy<data>(data_);
       data_allocator_.deallocate(data_, sz);
     }
   }

From 12be53d718dbcfa63eba4fd180570afbdc58b8f5 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 2 Jun 2024 18:11:25 +0800
Subject: [PATCH 252/272] Try adding test coverage check

---
 .github/workflows/codecov.yml | 34 ++++++++++++++++++++++++++++++++++
 CMakeLists.txt                | 16 ++++++++++++----
 2 files changed, 46 insertions(+), 4 deletions(-)
 create mode 100644 .github/workflows/codecov.yml

diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
new file mode 100644
index 00000000..e29d619c
--- /dev/null
+++ b/.github/workflows/codecov.yml
@@ -0,0 +1,34 @@
+name: Upload CodeCov Report
+
+on:
+  push:
+    branches: [ refactoring ]
+  pull_request:
+    branches: [ refactoring ]
+
+jobs:
+  build:
+  
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout Code
+      uses: actions/checkout@v2
+
+    - name: Configure
+      run: cmake -DCMAKE_BUILD_TYPE=Debug -DLIBIPC_BUILD_TESTS=ON -DLIBIPC_CODECOV=ON .
+
+    - name: Build
+      run:  make -j
+      
+    - name: Test
+      env:
+        LD_LIBRARY_PATH: ./lib
+      run: ./bin/test-ipc
+
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v4.0.1
+      with:
+        verbose: true
+      env:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d1fd61db..db65c02d 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.11)
+cmake_minimum_required(VERSION 3.13)
 project(cpp-ipc)
 
 option(LIBIPC_BUILD_TESTS       "Build all of libipc's own tests."                      OFF)
@@ -6,6 +6,7 @@ option(LIBIPC_BUILD_DEMOS       "Build all of libipc's own demos."
 option(LIBIPC_BUILD_BENCHMARK   "Build all of libipc's own benchmark tests."            OFF)
 option(LIBIPC_BUILD_SHARED_LIBS "Build shared libraries (DLLs)."                        OFF)
 option(LIBIPC_USE_STATIC_CRT    "Set to ON to build with static CRT on Windows (/MT)."  OFF)
+option(LIBIPC_CODECOV           "Build with unit test coverage."                        OFF)
 
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 set(CMAKE_CXX_STANDARD 17)
@@ -31,8 +32,15 @@ if (MSVC)
       endforeach()
   endif()
 else()
-  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -DNDEBUG -O2")
-  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -g -rdynamic -fsanitize=address")
+  add_compile_options(
+    "$<$<BOOL:${LIBIPC_CODECOV}>:SHELL:--coverage>"
+    "$<$<CONFIG:Release>:SHELL:-DNDEBUG -O2>"
+    "$<$<CONFIG:Debug>:SHELL:-g -rdynamic -fsanitize=address>"
+    )
+  add_link_options(
+    "$<$<BOOL:${LIBIPC_CODECOV}>:SHELL:-lgcov --coverage>"
+    "$<$<CONFIG:Debug>:SHELL:-fsanitize=address>"
+    )
 endif()
 
 set(LIBRARY_OUTPUT_PATH    ${CMAKE_BINARY_DIR}/bin)
@@ -73,4 +81,4 @@ endif()
 install(
   DIRECTORY "include/"
   DESTINATION "include"
-)
+  )

From 48fa2d9d963dd26ca0a4ac655c6adf56a1d27b8a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 2 Jun 2024 18:19:20 +0800
Subject: [PATCH 253/272] codecov badge

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 65fe94e2..8689a049 100755
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 [![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/mutouyun/cpp-ipc/blob/master/LICENSE) 
 [![Build Status](https://github.com/mutouyun/cpp-ipc/actions/workflows/c-cpp.yml/badge.svg)](https://github.com/mutouyun/cpp-ipc/actions)
+[![CodeCov](https://codecov.io/github/mutouyun/cpp-ipc/graph/badge.svg?token=MNOAOLNELH)](https://codecov.io/github/mutouyun/cpp-ipc)
 [![Vcpkg package](https://img.shields.io/badge/Vcpkg-package-blueviolet)](https://github.com/microsoft/vcpkg/tree/master/ports/cpp-ipc)
  
 A high-performance inter-process communication using shared memory on Linux/Windows.  

From 01da1334e154a1ce1c543eb2b415a23f9b0a4691 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 2 Jun 2024 18:22:27 +0800
Subject: [PATCH 254/272] Unified CI step names

---
 .github/workflows/c-cpp.yml   | 16 +++++++++++-----
 .github/workflows/codecov.yml |  4 ++--
 2 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index 46b4d84a..c7744fc4 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -12,10 +12,16 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
-    - name: cmake
+    - name: Checkout Code
+      uses: actions/checkout@v2
+
+    - name: Configure
       run: cmake -DCMAKE_BUILD_TYPE=Release -DLIBIPC_BUILD_TESTS=ON .
-    - name: make
+
+    - name: Build
       run: make -j
-    - name: test
-      run: export LD_LIBRARY_PATH=./lib:$LD_LIBRARY_PATH && ./bin/test-ipc
+
+    - name: Test
+      env:
+        LD_LIBRARY_PATH: ./lib
+      run: ./bin/test-ipc
diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index e29d619c..e10e8923 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -19,8 +19,8 @@ jobs:
       run: cmake -DCMAKE_BUILD_TYPE=Debug -DLIBIPC_BUILD_TESTS=ON -DLIBIPC_CODECOV=ON .
 
     - name: Build
-      run:  make -j
-      
+      run: make -j
+
     - name: Test
       env:
         LD_LIBRARY_PATH: ./lib

From 6ad911550eb38b24a847aefd15ede1b2528e2d9f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 2 Jun 2024 18:23:56 +0800
Subject: [PATCH 255/272] Refactor intrusive_stack implementation and tests

---
 include/libconcur/intrusive_stack.h | 20 ++++++++++++++------
 test/concur/test_concur_stack.cpp   | 29 +++++++++++++++++++----------
 2 files changed, 33 insertions(+), 16 deletions(-)

diff --git a/include/libconcur/intrusive_stack.h b/include/libconcur/intrusive_stack.h
index abaf7356..e315ebb7 100644
--- a/include/libconcur/intrusive_stack.h
+++ b/include/libconcur/intrusive_stack.h
@@ -12,13 +12,21 @@
 
 LIBCONCUR_NAMESPACE_BEG_
 
+/// \brief Intrusive stack node.
+/// \tparam T The type of the value.
 template <typename T>
+struct intrusive_node {
+  T value;
+  std::atomic<intrusive_node *> next;
+};
+
+/// \brief Intrusive stack.
+/// \tparam T The type of the value.
+/// \tparam Node The type of the node.
+template <typename T, typename Node = intrusive_node<T>>
 class intrusive_stack {
 public:
-  struct node {
-    T value;
-    std::atomic<node *> next{nullptr};
-  };
+  using node = Node;
 
 private:
   std::atomic<node *> top_{nullptr};
@@ -50,8 +58,8 @@ class intrusive_stack {
         return nullptr;
       }
     } while (!top_.compare_exchange_weak(old_top, old_top->next.load(std::memory_order_relaxed)
-                                                   , std::memory_order_release
-                                                   , std::memory_order_acquire));
+                                                , std::memory_order_release
+                                                , std::memory_order_acquire));
     return old_top;
   }
 };
diff --git a/test/concur/test_concur_stack.cpp b/test/concur/test_concur_stack.cpp
index 6dc8428f..33544c1a 100644
--- a/test/concur/test_concur_stack.cpp
+++ b/test/concur/test_concur_stack.cpp
@@ -10,7 +10,7 @@ TEST(intrusive_stack, construct) {
 }
 
 TEST(intrusive_stack, construct_node) {
-  concur::intrusive_stack<int>::node n;
+  concur::intrusive_stack<int>::node n{};
   EXPECT_TRUE(n.next.load(std::memory_order_relaxed) == nullptr);
 }
 
@@ -26,18 +26,19 @@ TEST(intrusive_stack, moveable) {
 
 TEST(intrusive_stack, push_one) {
   concur::intrusive_stack<int> s;
-  concur::intrusive_stack<int>::node n;
+  concur::intrusive_stack<int>::node n{123};
   s.push(&n);
   EXPECT_FALSE(s.empty());
   EXPECT_TRUE(s.top_.load(std::memory_order_relaxed) == &n);
   EXPECT_TRUE(n.next.load(std::memory_order_relaxed) == nullptr);
+  EXPECT_EQ(n.value, 123);
 }
 
 TEST(intrusive_stack, push_many) {
   concur::intrusive_stack<int> s;
-  concur::intrusive_stack<int>::node n1;
-  concur::intrusive_stack<int>::node n2;
-  concur::intrusive_stack<int>::node n3;
+  concur::intrusive_stack<int>::node n1{111111};
+  concur::intrusive_stack<int>::node n2{222222};
+  concur::intrusive_stack<int>::node n3{333333};
   s.push(&n1);
   s.push(&n2);
   s.push(&n3);
@@ -46,16 +47,20 @@ TEST(intrusive_stack, push_many) {
   EXPECT_TRUE(n3.next.load(std::memory_order_relaxed) == &n2);
   EXPECT_TRUE(n2.next.load(std::memory_order_relaxed) == &n1);
   EXPECT_TRUE(n1.next.load(std::memory_order_relaxed) == nullptr);
+  EXPECT_EQ(n1.value, 111111);
+  EXPECT_EQ(n2.value, 222222);
+  EXPECT_EQ(n3.value, 333333);
 }
 
 TEST(intrusive_stack, push_same) {
   concur::intrusive_stack<int> s;
-  concur::intrusive_stack<int>::node n;
+  concur::intrusive_stack<int>::node n{321};
   s.push(&n);
   s.push(&n);
   EXPECT_FALSE(s.empty());
   EXPECT_TRUE(s.top_.load(std::memory_order_relaxed) == &n);
   EXPECT_TRUE(n.next.load(std::memory_order_relaxed) == &n);
+  EXPECT_EQ(n.value, 321);
 }
 
 TEST(intrusive_stack, pop_empty) {
@@ -65,19 +70,20 @@ TEST(intrusive_stack, pop_empty) {
 
 TEST(intrusive_stack, pop_one) {
   concur::intrusive_stack<int> s;
-  concur::intrusive_stack<int>::node n;
+  concur::intrusive_stack<int>::node n{112233};
   s.push(&n);
   EXPECT_TRUE(s.pop() == &n);
   EXPECT_TRUE(s.empty());
   EXPECT_TRUE(s.top_.load(std::memory_order_relaxed) == nullptr);
   EXPECT_TRUE(n.next.load(std::memory_order_relaxed) == nullptr);
+  EXPECT_EQ(n.value, 112233);
 }
 
 TEST(intrusive_stack, pop_many) {
   concur::intrusive_stack<int> s;
-  concur::intrusive_stack<int>::node n1;
-  concur::intrusive_stack<int>::node n2;
-  concur::intrusive_stack<int>::node n3;
+  concur::intrusive_stack<int>::node n1{111111};
+  concur::intrusive_stack<int>::node n2{222222};
+  concur::intrusive_stack<int>::node n3{333333};
   s.push(&n1);
   s.push(&n2);
   s.push(&n3);
@@ -89,4 +95,7 @@ TEST(intrusive_stack, pop_many) {
   EXPECT_TRUE(n3.next.load(std::memory_order_relaxed) == &n2);
   EXPECT_TRUE(n2.next.load(std::memory_order_relaxed) == &n1);
   EXPECT_TRUE(n1.next.load(std::memory_order_relaxed) == nullptr);
+  EXPECT_EQ(n1.value, 111111);
+  EXPECT_EQ(n2.value, 222222);
+  EXPECT_EQ(n3.value, 333333);
 }

From 7e1731c5ef93026b06b0b8ea5b8bead4e62a6c47 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 10 Aug 2024 17:49:49 +0800
Subject: [PATCH 256/272] refactor: Add static_assert for trivially copyable
 type in data_model

---
 include/libconcur/data_model.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/libconcur/data_model.h b/include/libconcur/data_model.h
index 9805ba8d..eba484b9 100644
--- a/include/libconcur/data_model.h
+++ b/include/libconcur/data_model.h
@@ -9,6 +9,7 @@
 #include <atomic>
 #include <array>
 #include <tuple>
+#include <type_traits>
 #include <cstddef>
 #include <cstdint>
 
@@ -26,6 +27,9 @@ LIBCONCUR_NAMESPACE_BEG_
 
 template <typename T, typename TransModT, typename PRelationT, typename CRelationT>
 class data_model {
+
+  static_assert(std::is_trivially_copyable<T>::value, "T must be trivially copyable.");
+
 public:
   using producer_relation_t = PRelationT;
   using consumer_relation_t = CRelationT;

From c1dc10e1636d2a09da8194bdd3c183608d0395eb Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 10 Aug 2024 21:22:19 +0800
Subject: [PATCH 257/272] Refactor test_concur_concurrent.cpp to add dirty
 write test

---
 include/libconcur/concurrent.h         | 41 ++++++++---------
 include/libconcur/element.h            |  1 -
 test/concur/test_concur_concurrent.cpp | 61 +++++++++++++++++++++++++-
 test/test_util.h                       | 49 ++++++++++++++++++++-
 4 files changed, 128 insertions(+), 24 deletions(-)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index 33d8692f..dff57fd4 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -325,8 +325,8 @@ struct producer<trans::broadcast, relation::single> {
     hdr.w_idx.fetch_add(1, std::memory_order_release);
     // Set data & flag.
     elem.set_flag(w_idx | state::enqueue_mask);
-    elem.set_data(std::forward<U>(src));  // Here should not be interrupted.
-    elem.set_flag(w_idx | state::commit_mask);
+    elem.set_data(std::forward<U>(src));
+    elem.set_flag(w_idx);
     return true;
   }
 };
@@ -336,14 +336,14 @@ template <>
 struct producer<trans::broadcast, relation::multi> {
 
   struct header_impl {
-    std::atomic<state::flag_t> w_flags {0}; ///< write flags, combined current and starting index.
-    private: padding<decltype(w_flags)> ___;
+    std::atomic<std::uint64_t> w_contexts {0}; ///< write contexts, combined current and starting index.
+    private: padding<decltype(w_contexts)> ___;
 
   public:
     void get(index_t &idx, index_t &beg) const noexcept {
-      auto w_flags = this->w_flags.load(std::memory_order_relaxed);
-      idx = get_index(w_flags);
-      beg = get_begin(w_flags);
+      auto w_contexts = this->w_contexts.load(std::memory_order_relaxed);
+      idx = get_index(w_contexts);
+      beg = get_begin(w_contexts);
     }
   };
 
@@ -351,28 +351,29 @@ struct producer<trans::broadcast, relation::multi> {
             verify_elems_header<H> = true,
             convertible<H, header_impl> = true>
   static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
-    auto w_flags = hdr.w_flags.load(std::memory_order_acquire);
+    auto w_contexts = hdr.w_contexts.load(std::memory_order_acquire);
     index_t w_idx;
     for (;;) {
-      w_idx = get_index(w_flags);
-      auto w_beg = get_begin(w_flags);
+      w_idx = get_index(w_contexts);
+      auto w_beg = get_begin(w_contexts);
       // Move the queue head index.
       if (w_beg + hdr.circ_size <= w_idx) {
         w_beg += 1;
       }
-      // Update flags.
-      auto n_flags = make_flags(w_idx + 1/*iterate backwards*/, w_beg);
-      if (hdr.w_flags.compare_exchange_weak(w_flags, n_flags, std::memory_order_acq_rel)) {
+      // Update write contexts.
+      auto n_contexts = make_w_contexts(w_idx + 1/*iterate backwards*/, w_beg);
+      if (hdr.w_contexts.compare_exchange_weak(w_contexts, n_contexts, std::memory_order_acq_rel)) {
         break;
       }
     }
     // Get element.
     auto w_cur = trunc_index(hdr, w_idx);
     auto &elem = elems[w_cur];
-    // Set data & flag.
+    // Set data & flag. Dirty write is not considered here. 
+    // By default, when dirty write occurs, the previous writer must no longer exist.
     elem.set_flag(w_idx | state::enqueue_mask);
-    elem.set_data(std::forward<U>(src));  // Here should not be interrupted.
-    elem.set_flag(w_idx | state::commit_mask);
+    elem.set_data(std::forward<U>(src));
+    elem.set_flag(w_idx);
     return true;
   }
 
@@ -387,8 +388,8 @@ struct producer<trans::broadcast, relation::multi> {
     return index_t(flags >> (sizeof(index_t) * CHAR_BIT));
   }
 
-  static constexpr state::flag_t make_flags(index_t idx, index_t beg) noexcept {
-    return state::flag_t(idx) | (state::flag_t(beg) << (sizeof(index_t) * CHAR_BIT));
+  static constexpr std::uint64_t make_w_contexts(index_t idx, index_t beg) noexcept {
+    return std::uint64_t(idx) | (std::uint64_t(beg) << (sizeof(index_t) * CHAR_BIT));
   }
 };
 
@@ -426,7 +427,7 @@ struct consumer<trans::broadcast, relation::multi> {
     }
     // Try getting data.
     for (;;) {
-      if ((f_ct & state::enqueue_mask) == state::enqueue_mask) {
+      if (f_ct & state::enqueue_mask) {
         return false; // unreadable
       }
       des = LIBCONCUR::get(elem);
@@ -434,8 +435,8 @@ struct consumer<trans::broadcast, relation::multi> {
       // the elem data is not modified during the getting process.
       if (elem.cas_flag(f_ct, f_ct)) break;
     }
-    ctx.w_lst = (f_ct & ~state::enqueue_mask) + 1;
     // Get a valid index and iterate backwards.
+    ctx.w_lst = index_t(f_ct) + 1;
     ctx.r_idx += 1;
     return true;
   }
diff --git a/include/libconcur/element.h b/include/libconcur/element.h
index b50c7cf3..c0f06d21 100644
--- a/include/libconcur/element.h
+++ b/include/libconcur/element.h
@@ -27,7 +27,6 @@ using flag_t = std::uint64_t;
 enum : flag_t {
   invalid_value = ~flag_t(0),
   enqueue_mask  = invalid_value << 32,
-  commit_mask   = ~flag_t(1) << 32,
 };
 
 } // namespace state
diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index f8e18373..0362de84 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -13,6 +13,8 @@
 #include "libimp/log.h"
 #include "libimp/nameof.h"
 
+#include "test_util.h"
+
 TEST(concurrent, cache_line_size) {
   std::cout << concur::cache_line_size << "\n";
   EXPECT_TRUE(concur::cache_line_size >= alignof(std::max_align_t));
@@ -311,4 +313,61 @@ TEST(concurrent, broadcast) {
 
   /// \brief 8-8
   test_broadcast<prod_cons<trans::broadcast, relation::multi , relation::multi>>(8, 8);
-}
\ No newline at end of file
+}
+
+TEST(concurrent, broadcast_multi_dirtywrite) {
+  using namespace concur;
+
+  struct data {
+    std::uint64_t n{};
+
+    data &operator=(test::latch &l) noexcept {
+      l.arrive_and_wait();
+      std::this_thread::sleep_for(std::chrono::milliseconds(10));
+      n = 1;
+      return *this;
+    }
+
+    data &operator=(data const &rhs) noexcept {
+      n = rhs.n;
+      return *this;
+    }
+  };
+
+  element<data> circ[2] {};
+  prod_cons<trans::broadcast, relation::multi, relation::multi> pc;
+  typename traits<decltype(pc)>::header hdr {imp::make_span(circ)};
+
+  auto push_one = [&, ctx = typename concur::traits<decltype(pc)>::context{}](auto &i) mutable {
+    return pc.enqueue(imp::make_span(circ), hdr, ctx, i);
+  };
+  auto pop_one = [&, ctx = typename concur::traits<decltype(pc)>::context{}]() mutable {
+    data i;
+    if (pc.dequeue(imp::make_span(circ), hdr, ctx, i)) {
+      return i;
+    }
+    return data{};
+  };
+
+  test::latch l(2);
+  std::thread t[2];
+  t[0] = std::thread([&] {
+    push_one(l); // 1
+  });
+  t[1] = std::thread([&] {
+    l.arrive_and_wait();
+    push_one(data{3});
+    push_one(data{2}); // dirty write
+  });
+
+  for (int i = 0; i < 2; ++i) {
+    t[i].join();
+  }
+  std::set<std::uint64_t> s{1, 2, 3};
+  for (int i = 0; i < 2; ++i) {
+    auto d = pop_one();
+    EXPECT_TRUE(s.find(d.n) != s.end());
+    s.erase(d.n);
+  }
+  EXPECT_TRUE(s.find(3) == s.end());
+}
diff --git a/test/test_util.h b/test/test_util.h
index a55a128d..da22ea8f 100644
--- a/test/test_util.h
+++ b/test/test_util.h
@@ -1,13 +1,22 @@
 
 #pragma once
 
-#include <sys/wait.h>
-#include <unistd.h>
+#include "libimp/detect_plat.h"
+#ifndef LIBIMP_OS_WIN
+# include <sys/wait.h>
+# include <unistd.h>
+#else
+# define pid_t int
+#endif
+
+#include <condition_variable>
+#include <mutex>
 
 namespace test {
 
 template <typename Fn>
 pid_t subproc(Fn&& fn) {
+#ifndef LIBIMP_OS_WIN
   pid_t pid = fork();
   if (pid == -1) {
     return pid;
@@ -21,13 +30,49 @@ pid_t subproc(Fn&& fn) {
     exit(0);
   }
   return pid;
+#else
+  return -1;
+#endif
 }
 
 inline void join_subproc(pid_t pid) {
+#ifndef LIBIMP_OS_WIN
   int ret_code;
   waitpid(pid, &ret_code, 0);
+#endif
 }
 
+/// \brief A simple latch implementation.
+class latch {
+public:
+  explicit latch(int count) : count_(count) {}
+
+  void count_down() {
+    std::unique_lock<std::mutex> lock(mutex_);
+    if (count_ > 0) {
+      --count_;
+      if (count_ == 0) {
+        cv_.notify_all();
+      }
+    }
+  }
+
+  void wait() {
+    std::unique_lock<std::mutex> lock(mutex_);
+    cv_.wait(lock, [&] { return count_ == 0; });
+  }
+
+  void arrive_and_wait() {
+    count_down();
+    wait();
+  }
+
+private:
+  std::mutex mutex_;
+  std::condition_variable cv_;
+  int count_;
+};
+
 } // namespace test
 
 #define REQUIRE_EXIT(...) \

From 95f6bdc23e6a016f252ad5b0a52009d0529f25d5 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 11 Aug 2024 17:18:36 +0800
Subject: [PATCH 258/272] Refactor test_concur_concurrent.cpp to fix
 compilation errors

---
 test/concur/test_concur_concurrent.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
index 0362de84..214f89a1 100644
--- a/test/concur/test_concur_concurrent.cpp
+++ b/test/concur/test_concur_concurrent.cpp
@@ -319,7 +319,7 @@ TEST(concurrent, broadcast_multi_dirtywrite) {
   using namespace concur;
 
   struct data {
-    std::uint64_t n{};
+    std::uint64_t n;
 
     data &operator=(test::latch &l) noexcept {
       l.arrive_and_wait();
@@ -338,7 +338,7 @@ TEST(concurrent, broadcast_multi_dirtywrite) {
   prod_cons<trans::broadcast, relation::multi, relation::multi> pc;
   typename traits<decltype(pc)>::header hdr {imp::make_span(circ)};
 
-  auto push_one = [&, ctx = typename concur::traits<decltype(pc)>::context{}](auto &i) mutable {
+  auto push_one = [&, ctx = typename concur::traits<decltype(pc)>::context{}](auto &&i) mutable {
     return pc.enqueue(imp::make_span(circ), hdr, ctx, i);
   };
   auto pop_one = [&, ctx = typename concur::traits<decltype(pc)>::context{}]() mutable {
@@ -346,7 +346,7 @@ TEST(concurrent, broadcast_multi_dirtywrite) {
     if (pc.dequeue(imp::make_span(circ), hdr, ctx, i)) {
       return i;
     }
-    return data{};
+    return data{0};
   };
 
   test::latch l(2);

From 73df616f8bdb297ba7cb7e3480073f2ff5c18e78 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 11 Aug 2024 17:21:18 +0800
Subject: [PATCH 259/272] refactor: Remove unnecessary comment in concurrent.h

---
 include/libconcur/concurrent.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index dff57fd4..64e5056a 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -370,7 +370,6 @@ struct producer<trans::broadcast, relation::multi> {
     auto w_cur = trunc_index(hdr, w_idx);
     auto &elem = elems[w_cur];
     // Set data & flag. Dirty write is not considered here. 
-    // By default, when dirty write occurs, the previous writer must no longer exist.
     elem.set_flag(w_idx | state::enqueue_mask);
     elem.set_data(std::forward<U>(src));
     elem.set_flag(w_idx);

From 44a44861605bec10432ecbb05b4201259d33aaec Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 11 Aug 2024 17:24:39 +0800
Subject: [PATCH 260/272] refactor: Add comments for dirty write cases

---
 include/libconcur/concurrent.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
index 64e5056a..d3f8b0f6 100644
--- a/include/libconcur/concurrent.h
+++ b/include/libconcur/concurrent.h
@@ -370,6 +370,7 @@ struct producer<trans::broadcast, relation::multi> {
     auto w_cur = trunc_index(hdr, w_idx);
     auto &elem = elems[w_cur];
     // Set data & flag. Dirty write is not considered here. 
+    // By default, when dirty writes occur, the writing behavior itself must be atomic.
     elem.set_flag(w_idx | state::enqueue_mask);
     elem.set_data(std::forward<U>(src));
     elem.set_flag(w_idx);

From 400ee4a1a867d27f308efca6a672db9232358623 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 31 Aug 2024 17:51:43 +0800
Subject: [PATCH 261/272] update readme

---
 README.md | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 8689a049..f58530c6 100755
--- a/README.md
+++ b/README.md
@@ -1,11 +1,35 @@
 # cpp-ipc(libipc) - C++ IPC Library
 
-[![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/mutouyun/cpp-ipc/blob/master/LICENSE) 
+[![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/mutouyun/cpp-ipc/blob/master/LICENSE)
 [![Build Status](https://github.com/mutouyun/cpp-ipc/actions/workflows/c-cpp.yml/badge.svg)](https://github.com/mutouyun/cpp-ipc/actions)
 [![CodeCov](https://codecov.io/github/mutouyun/cpp-ipc/graph/badge.svg?token=MNOAOLNELH)](https://codecov.io/github/mutouyun/cpp-ipc)
 [![Vcpkg package](https://img.shields.io/badge/Vcpkg-package-blueviolet)](https://github.com/microsoft/vcpkg/tree/master/ports/cpp-ipc)
  
 A high-performance inter-process communication using shared memory on Linux/Windows.  
 使用共享内存的跨平台（Linux/Windows，x86/x64/ARM）高性能IPC通讯库。
- 
- * 【**重构中……**】
+
+---
+
+* 【**重构中……**】
+
+- [ ] 重构代码结构：
+    - [x] imp（基础库）
+    - [x] pmr（内存管理）
+    - [x] concur（并发）
+    - [ ] sock（简单的 socket 抽象）
+- [ ] 实现基本的 IPC 组件
+    - [x] 共享内存（需要作为后续组件的基础）
+    - [x] 原子锁
+    - [ ] 进程对象
+    - [ ] 互斥量
+    - [ ] 条件变量
+    - [ ] 信号量
+    - [ ] 事件（支持 I/O 多路复用）
+- [ ] 实现 IPC 主体功能
+    - [ ] 基于共享内存的变长循环（？）内存池（作为大对象的底层存储）
+    - [ ] 节点间的相互发现机制（基于 sock，避免连接）
+    - [ ] 实现单对单、单对多、多对多收发模型
+- [ ] API/性能优化
+    - [ ] 支持零拷贝发送
+    - [ ] 支持多路读取等待
+    - [ ] 优化无锁队列实现
\ No newline at end of file

From 9325fbdf5c8412cacd11d001051e05bdb1edcf43 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 1 Sep 2024 14:09:16 +0800
Subject: [PATCH 262/272] update readme

---
 README.md | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/README.md b/README.md
index f58530c6..237a2c7c 100755
--- a/README.md
+++ b/README.md
@@ -13,11 +13,12 @@ A high-performance inter-process communication using shared memory on Linux/Wind
 * 【**重构中……**】
 
 - [ ] 重构代码结构：
-    - [x] imp（基础库）
-    - [x] pmr（内存管理）
-    - [x] concur（并发）
-    - [ ] sock（简单的 socket 抽象）
-- [ ] 实现基本的 IPC 组件
+    - [x] imp - 基础库
+    - [x] pmr - 内存管理
+    - [x] concur - 并发
+    - [ ] sock - 简单的 socket 抽象
+    - [ ] te - 类型擦除
+- [ ] IPC：实现基本组件
     - [x] 共享内存（需要作为后续组件的基础）
     - [x] 原子锁
     - [ ] 进程对象
@@ -25,11 +26,11 @@ A high-performance inter-process communication using shared memory on Linux/Wind
     - [ ] 条件变量
     - [ ] 信号量
     - [ ] 事件（支持 I/O 多路复用）
-- [ ] 实现 IPC 主体功能
-    - [ ] 基于共享内存的变长循环（？）内存池（作为大对象的底层存储）
+- [ ] IPC：实现主体功能
+    - [ ] 基于共享内存的变长循环内存池（作为大对象的底层存储）
     - [ ] 节点间的相互发现机制（基于 sock，避免连接）
     - [ ] 实现单对单、单对多、多对多收发模型
-- [ ] API/性能优化
+- [ ] IPC：API/性能优化
     - [ ] 支持零拷贝发送
     - [ ] 支持多路读取等待
     - [ ] 优化无锁队列实现
\ No newline at end of file

From 8c643308dd2e99de2751a6d7bb84a423b4c2706f Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 1 Sep 2024 15:32:23 +0800
Subject: [PATCH 263/272] refactor: horrible_cast implementation

---
 include/libimp/horrible_cast.h | 5 ++---
 test/imp/test_imp_utility.cpp  | 6 +++++-
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/include/libimp/horrible_cast.h b/include/libimp/horrible_cast.h
index 39398814..2128ed11 100644
--- a/include/libimp/horrible_cast.h
+++ b/include/libimp/horrible_cast.h
@@ -23,9 +23,8 @@ union temp {
 } // namespace detail_horrible_cast
 
 template <typename T, typename U>
-constexpr auto horrible_cast(U &&in) noexcept
-  -> std::enable_if_t<(sizeof(T) == sizeof(std::decay_t<U>)), T> {
-  return detail_horrible_cast::temp<T, std::decay_t<U>>{std::forward<U>(in)}.out;
+constexpr T horrible_cast(U &&in) noexcept {
+  return detail_horrible_cast::temp<T, U>{std::forward<U>(in)}.out;
 }
 
 LIBIMP_NAMESPACE_END_
diff --git a/test/imp/test_imp_utility.cpp b/test/imp/test_imp_utility.cpp
index 3c6ba5d6..037683d5 100644
--- a/test/imp/test_imp_utility.cpp
+++ b/test/imp/test_imp_utility.cpp
@@ -143,7 +143,11 @@ TEST(utility, horrible_cast) {
   EXPECT_EQ(b.a_[0], 0);
 #endif
 
-  // imp::horrible_cast<std::uint32_t>(0ll);
+#if LIBIMP_ENDIAN_LIT
+  EXPECT_EQ(imp::horrible_cast<std::uint32_t>(0xff00'0000'0001ll), 1);
+#else
+  EXPECT_EQ(imp::horrible_cast<std::uint32_t>(0xff00'0000'0001ll), 0xff00);
+#endif
 }
 
 #if defined(LIBIMP_CPP_17)

From 264608b62156b83c342730ccc5b321077e748b4a Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 1 Sep 2024 19:05:02 +0800
Subject: [PATCH 264/272] Testing with threads instead of processes under
 Windows.

---
 README.md                              |  1 -
 src/libipc/CMakeLists.txt              | 12 +++++
 src/libipc/platform/win/process_impl.h | 71 ++++++++++++++++++++++++++
 test/ipc/test_ipc_shm.cpp              | 20 +++++++-
 test/test_util.h                       | 17 ++++--
 5 files changed, 115 insertions(+), 6 deletions(-)
 create mode 100644 src/libipc/platform/win/process_impl.h

diff --git a/README.md b/README.md
index 237a2c7c..8ee59ed9 100755
--- a/README.md
+++ b/README.md
@@ -21,7 +21,6 @@ A high-performance inter-process communication using shared memory on Linux/Wind
 - [ ] IPC：实现基本组件
     - [x] 共享内存（需要作为后续组件的基础）
     - [x] 原子锁
-    - [ ] 进程对象
     - [ ] 互斥量
     - [ ] 条件变量
     - [ ] 信号量
diff --git a/src/libipc/CMakeLists.txt b/src/libipc/CMakeLists.txt
index 8ece8b53..5c67bb71 100644
--- a/src/libipc/CMakeLists.txt
+++ b/src/libipc/CMakeLists.txt
@@ -5,6 +5,14 @@ if(NOT MSVC)
     -Wno-attributes)
 endif()
 
+# if(CMAKE_SYSTEM_NAME MATCHES "Windows")
+#   FetchContent_Declare(phnt
+#     GIT_REPOSITORY https://github.com/winsiderss/phnt.git
+#     GIT_TAG        master
+#   )
+#   FetchContent_MakeAvailable(phnt)
+# endif()
+
 aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libipc SRC_FILES)
 
 file(GLOB HEAD_FILES
@@ -47,6 +55,10 @@ else()
   target_link_libraries(${PROJECT_NAME} PUBLIC imp pmr)
 endif()
 
+# if(CMAKE_SYSTEM_NAME MATCHES "Windows")
+#   target_link_libraries(${PROJECT_NAME} PUBLIC phnt)
+# endif()
+
 install(
   TARGETS ${PROJECT_NAME}
   RUNTIME DESTINATION bin
diff --git a/src/libipc/platform/win/process_impl.h b/src/libipc/platform/win/process_impl.h
new file mode 100644
index 00000000..3468825f
--- /dev/null
+++ b/src/libipc/platform/win/process_impl.h
@@ -0,0 +1,71 @@
+/**
+ * \file libipc/platform/win/process_impl.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <phnt_windows.h>
+#include <phnt.h>
+
+#include "libimp/log.h"
+#include "libipc/process.h"
+
+LIBIPC_NAMESPACE_BEG_
+using namespace ::LIBIMP;
+
+/// \brief Experimental fork() on Windows.
+/// \see https://gist.github.com/Cr4sh/126d844c28a7fbfd25c6
+///      https://github.com/huntandhackett/process-cloning
+namespace {
+
+typedef SSIZE_T pid_t;
+
+pid_t fork() {
+  LIBIMP_LOG_();
+
+  RTL_USER_PROCESS_INFORMATION process_info;
+  NTSTATUS status;
+
+  /* lets do this */
+  status = RtlCloneUserProcess(RTL_CLONE_PROCESS_FLAGS_INHERIT_HANDLES
+                             , NULL, NULL, NULL, &process_info);
+  if (status == STATUS_PROCESS_CLONED) {
+    // Executing inside the clone...
+    // Re-attach to the parent's console to be able to write to it
+    FreeConsole();
+    AttachConsole(ATTACH_PARENT_PROCESS);
+    return 0;
+  } else {
+    // Executing inside the original (parent) process...
+    if (!NT_SUCCESS(status)) {
+      log.error("failed: RtlCloneUserProcess(...)");
+      return -1;
+    }
+    return (pid_t)process_info.ProcessHandle;
+  }
+
+  /* NOTREACHED */
+}
+
+#define	WNOHANG 1	/* Don't block waiting. */
+
+/// \see https://man7.org/linux/man-pages/man3/wait.3p.html
+///      https://learn.microsoft.com/en-us/windows/win32/api/winternl/nf-winternl-ntwaitforsingleobject
+pid_t waitpid(pid_t pid, int */*status*/, int options) {
+  LIBIMP_LOG_();
+  if (pid == -1) {
+    return -1;
+  }
+  if (options & WNOHANG) {
+    return pid;
+  }
+  NTSTATUS status = NtWaitForSingleObject((HANDLE)pid, FALSE, NULL);
+  if (!NT_SUCCESS(status)) {
+    log.error("failed: NtWaitForSingleObject(...)");
+    return -1;
+  }
+  return pid;
+}
+
+} // namespace
+LIBIPC_NAMESPACE_END_
diff --git a/test/ipc/test_ipc_shm.cpp b/test/ipc/test_ipc_shm.cpp
index 249cf37b..9a237d00 100644
--- a/test/ipc/test_ipc_shm.cpp
+++ b/test/ipc/test_ipc_shm.cpp
@@ -3,6 +3,8 @@
 
 #include "libipc/shm.h"
 
+#include "test_util.h"
+
 TEST(shm, open_close) {
   EXPECT_FALSE(ipc::shm_open("hello-ipc-shm", 1024, ipc::mode::none));
 
@@ -76,6 +78,22 @@ TEST(shm, shared_memory) {
   EXPECT_TRUE(ipc::shm_close(*shm_r));
 }
 
+TEST(shm, process) {
+  ipc::shared_memory shm{"ipc-shared-memory-process1", 333};
+  ASSERT_TRUE(shm.valid());
+  *shm.as<int>() = 4321;
+
+  auto r1 = test::subproc([] {
+    ipc::shared_memory shm{"ipc-shared-memory-process1"};
+    ASSERT_TRUE(shm.valid());
+    EXPECT_EQ(*shm.as<int>(), 4321);
+    *shm.as<int>() = 1234;
+  });
+
+  test::join_subproc(r1);
+  EXPECT_EQ(*shm.as<int>(), 1234);
+}
+
 #include <libimp/detect_plat.h>
 #if /*defined(LIBIMP_OS_LINUX)*/ 0
 #include <sys/socket.h>
@@ -87,8 +105,6 @@ TEST(shm, shared_memory) {
 #include <unistd.h>
 #include <fcntl.h>
 
-#include "test_util.h"
-
 TEST(shm, pipe) {
   auto writer = test::subproc([] {
     mkfifo("/tmp/shm-pipe.w", S_IFIFO|0666);
diff --git a/test/test_util.h b/test/test_util.h
index da22ea8f..c78d9190 100644
--- a/test/test_util.h
+++ b/test/test_util.h
@@ -6,7 +6,9 @@
 # include <sys/wait.h>
 # include <unistd.h>
 #else
-# define pid_t int
+# include <Windows.h>
+# include <process.h>
+# define pid_t uintptr_t
 #endif
 
 #include <condition_variable>
@@ -15,7 +17,7 @@
 namespace test {
 
 template <typename Fn>
-pid_t subproc(Fn&& fn) {
+pid_t subproc(Fn &&fn) {
 #ifndef LIBIMP_OS_WIN
   pid_t pid = fork();
   if (pid == -1) {
@@ -31,14 +33,23 @@ pid_t subproc(Fn&& fn) {
   }
   return pid;
 #else
-  return -1;
+  auto runner = [](void* pparam) {
+    auto fn = reinterpret_cast<std::decay_t<Fn> *>(pparam);
+    (*fn)();
+  };
+  return _beginthread(runner, 0, (void *)&fn);
 #endif
 }
 
 inline void join_subproc(pid_t pid) {
+  if (pid == -1) return;
 #ifndef LIBIMP_OS_WIN
   int ret_code;
   waitpid(pid, &ret_code, 0);
+#else
+  HANDLE hThread = reinterpret_cast<HANDLE>(pid);
+  WaitForSingleObject(hThread, INFINITE);
+  CloseHandle(hThread);
 #endif
 }
 

From 1fe8d9361276ceb8c22e151ee2f107ac414bad8e Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 16 Sep 2024 19:22:41 +0800
Subject: [PATCH 265/272] Add deleter struct for std::unique_ptr destruction
 policy

---
 include/libpmr/new.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/libpmr/new.h b/include/libpmr/new.h
index d3a70e12..ab1dfb0e 100644
--- a/include/libpmr/new.h
+++ b/include/libpmr/new.h
@@ -8,6 +8,7 @@
 
 #include <cstddef>
 #include <algorithm>
+#include <type_traits>
 
 #include "libimp/aligned.h"
 #include "libimp/uninitialized.h"
@@ -167,4 +168,13 @@ void $delete(T *p) noexcept {
 #endif
 }
 
+/// \brief The destruction policy used by std::unique_ptr.
+/// \see https://en.cppreference.com/w/cpp/memory/default_delete
+struct deleter {
+  template <typename T>
+  void operator()(T *p) const noexcept {
+    $delete(p);
+  }
+};
+
 LIBPMR_NAMESPACE_END_

From 7421b95939bd65295825d3719d1542e417ba459b Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 16 Sep 2024 19:23:17 +0800
Subject: [PATCH 266/272] Refactor handle closing in Windows platform code

---
 src/libipc/platform/win/close_handle.h | 38 ++++++++++++++++++++++++++
 src/libipc/platform/win/event_impl.h   | 18 ++++++------
 src/libipc/platform/win/mmap_impl.h    | 24 +++-------------
 src/libipc/platform/win/shm_impl.h     | 13 +++++----
 4 files changed, 58 insertions(+), 35 deletions(-)
 create mode 100644 src/libipc/platform/win/close_handle.h

diff --git a/src/libipc/platform/win/close_handle.h b/src/libipc/platform/win/close_handle.h
new file mode 100644
index 00000000..b7c51e77
--- /dev/null
+++ b/src/libipc/platform/win/close_handle.h
@@ -0,0 +1,38 @@
+/**
+ * \file libipc/platform/win/close_handle.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <Windows.h>
+
+#include "libimp/log.h"
+#include "libimp/system.h"
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+using namespace ::LIBIMP;
+
+namespace winapi {
+
+/**
+ * \brief Closes an open object handle.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
+ */
+inline result<void> close_handle(HANDLE h) noexcept {
+  LIBIMP_LOG_();
+  if (h == NULL) {
+    log.error("handle is null.");
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  if (!::CloseHandle(h)) {
+    auto err = sys::error();
+    log.error("failed: CloseHandle(", h, "). error = ", err);
+    return err;
+  }
+  return std::error_code{};
+}
+
+} // namespace winapi
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/event_impl.h b/src/libipc/platform/win/event_impl.h
index 9ca9c441..be441fcb 100644
--- a/src/libipc/platform/win/event_impl.h
+++ b/src/libipc/platform/win/event_impl.h
@@ -12,13 +12,17 @@
 #include <Windows.h>
 
 #include "libimp/log.h"
+#include "libpmr/new.h"
 #include "libipc/event.h"
 
 #include "get_sa.h"
 #include "to_tchar.h"
+#include "close_handle.h"
 
 LIBIPC_NAMESPACE_BEG_
+
 using namespace ::LIBIMP;
+using namespace ::LIBPMR;
 
 struct evt_handle {
   std::string name;
@@ -51,26 +55,20 @@ result<evt_t> evt_open(std::string name) noexcept {
     log.error("failed: CreateEvent(FALSE, FALSE, ", name, "). error = ", err);
     return err;
   }
-  return new evt_handle{std::move(name), h};
+  return $new<evt_handle>(std::move(name), h);
 }
 
 /**
- * \brief Closes an open object handle.
- * \see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
+ * \brief Closes an open event object handle.
  */
 result<void> evt_close(evt_t evt) noexcept {
   LIBIMP_LOG_();
-  LIBIMP_UNUSED auto guard = std::unique_ptr<evt_handle>(evt);
+  LIBIMP_UNUSED auto guard = std::unique_ptr<evt_handle, deleter>(evt);
   if (!is_valid(evt)) {
     log.error("handle is null.");
     return {};
   }
-  if (!::CloseHandle(evt->h_event)) {
-    auto err = sys::error();
-    log.error("failed: CloseHandle(", evt->h_event, "). error = ", err);
-    return err;
-  }
-  return std::error_code{};
+  return winapi::close_handle(evt->h_event);
 }
 
 /**
diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/mmap_impl.h
index e911a98f..de73f146 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/mmap_impl.h
@@ -16,8 +16,10 @@
 
 #include "get_sa.h"
 #include "to_tchar.h"
+#include "close_handle.h"
 
 LIBIPC_NAMESPACE_BEG_
+
 using namespace ::LIBIMP;
 
 struct shm_handle {
@@ -29,24 +31,6 @@ struct shm_handle {
 
 namespace {
 
-/**
- * \brief Closes an open object handle.
- * \see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
- */
-result<void> mmap_close(HANDLE h) {
-  LIBIMP_LOG_();
-  if (h == NULL) {
-    log.error("handle is null.");
-    return std::make_error_code(std::errc::invalid_argument);
-  }
-  if (!::CloseHandle(h)) {
-    auto err = sys::error();
-    log.error("failed: CloseHandle(", h, "). error = ", err);
-    return err;
-  }
-  return std::error_code{};
-}
-
 /**
  * \brief Creates or opens a file mapping object for a specified file.
  * 
@@ -113,7 +97,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
   ///         (with its current size, not the specified size), and GetLastError returns ERROR_ALREADY_EXISTS.
   if ((type == mode::create) && (::GetLastError() == ERROR_ALREADY_EXISTS)) {
     log.info("the file being created already exists. file = ", file, ", type = ", type);
-    mmap_close(*h);
+    winapi::close_handle(*h);
     return sys::error();
   }
   return h;
@@ -174,7 +158,7 @@ result<void> mmap_release(HANDLE h, LPCVOID mem) {
   if (!::UnmapViewOfFile(mem)) {
     log.warning("failed: UnmapViewOfFile. error = ", sys::error());
   }
-  return mmap_close(h);
+  return winapi::close_handle(h);
 }
 
 } // namespace
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index 243df965..e6b0296a 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -9,13 +9,16 @@
 
 #include "libimp/log.h"
 #include "libimp/system.h"
-
+#include "libpmr/new.h"
 #include "libipc/shm.h"
 
 #include "mmap_impl.h"
+#include "close_handle.h"
 
 LIBIPC_NAMESPACE_BEG_
+
 using namespace ::LIBIMP;
+using namespace ::LIBPMR;
 
 result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
   LIBIMP_LOG_();
@@ -27,16 +30,16 @@ result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noex
   auto mem = mmap_memof(*h);
   if (*mem == NULL) {
     log.error("failed: mmap_memof(", *h, ").");
-    mmap_close(*h);
+    winapi::close_handle(*h);
     return mem.error();
   }
   auto sz = mmap_sizeof(*mem);
   if (!sz) {
     log.error("failed: mmap_sizeof(", *mem, ").");
-    mmap_close(*h);
+    winapi::close_handle(*h);
     return sz.error();
   }
-  return new shm_handle{std::move(name), *sz, *mem, *h};
+  return $new<shm_handle>(std::move(name), *sz, *mem, *h);
 }
 
 result<void> shm_close(shm_t h) noexcept {
@@ -47,7 +50,7 @@ result<void> shm_close(shm_t h) noexcept {
   }
   auto shm = static_cast<shm_handle *>(h);
   auto ret = mmap_release(shm->h_fmap, shm->memp);
-  delete shm;
+  $delete(shm);
   return ret;
 }
 

From 1c2fee0d725ae430c16fa26494459168741dd86e Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 21 Sep 2024 17:24:38 +0800
Subject: [PATCH 267/272] Refactor file names and include headers in Windows
 platform code

---
 .../platform/win/{mmap_impl.h => api.h}       | 88 +++++++++++++++----
 src/libipc/platform/win/close_handle.h        | 38 --------
 src/libipc/platform/win/event_impl.h          | 10 +--
 src/libipc/platform/win/get_sa.h              | 51 -----------
 src/libipc/platform/win/process_impl.h        | 71 ---------------
 src/libipc/platform/win/shm_impl.h            | 18 ++--
 src/libipc/platform/win/to_tchar.h            | 27 ------
 7 files changed, 84 insertions(+), 219 deletions(-)
 rename src/libipc/platform/win/{mmap_impl.h => api.h} (72%)
 delete mode 100644 src/libipc/platform/win/close_handle.h
 delete mode 100644 src/libipc/platform/win/get_sa.h
 delete mode 100644 src/libipc/platform/win/process_impl.h
 delete mode 100644 src/libipc/platform/win/to_tchar.h

diff --git a/src/libipc/platform/win/mmap_impl.h b/src/libipc/platform/win/api.h
similarity index 72%
rename from src/libipc/platform/win/mmap_impl.h
rename to src/libipc/platform/win/api.h
index de73f146..45f94e35 100644
--- a/src/libipc/platform/win/mmap_impl.h
+++ b/src/libipc/platform/win/api.h
@@ -1,35 +1,85 @@
 /**
- * \file libipc/platform/win/mmap_impl.h
+ * \file libipc/platform/win/api.h
  * \author mutouyun (orz@orzz.org)
  */
 #pragma once
 
+#include <Windows.h>
+#include <securitybaseapi.h>
+#include <tchar.h>
+
 #include <string>
 #include <cstddef>
 
-#include <Windows.h>
-
 #include "libimp/log.h"
 #include "libimp/system.h"
+#include "libimp/codecvt.h"
 
-#include "libipc/shm.h"
-
-#include "get_sa.h"
-#include "to_tchar.h"
-#include "close_handle.h"
+#include "libipc/def.h"
 
 LIBIPC_NAMESPACE_BEG_
-
 using namespace ::LIBIMP;
 
-struct shm_handle {
-  std::string file;
-  std::size_t f_sz;
-  void *memp;
-  HANDLE h_fmap;
-};
+namespace winapi {
+
+using tstring = std::basic_string<TCHAR>;
 
-namespace {
+inline tstring to_tstring(std::string const &str) {
+  tstring des;
+  ::LIBIMP::cvt_sstr(str, des);
+  return des;
+}
+
+/**
+ * \brief Create a SECURITY_ATTRIBUTES structure singleton
+ * \see https://docs.microsoft.com/en-us/previous-versions/windows/desktop/legacy/aa379560(v=vs.85)
+ */
+inline LPSECURITY_ATTRIBUTES get_sa() {
+  static struct initiator {
+
+    SECURITY_DESCRIPTOR sd_;
+    SECURITY_ATTRIBUTES sa_;
+
+    bool succ_ = false;
+
+    initiator() {
+      using namespace ::LIBIMP;
+      LIBIMP_LOG_("get_sa");
+      if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
+        log.error("failed: InitializeSecurityDescriptor(SECURITY_DESCRIPTOR_REVISION). "
+                  "error = ", sys::error());
+        return;
+      }
+      if (!::SetSecurityDescriptorDacl(&sd_, TRUE, NULL, FALSE)) {
+        log.error("failed: SetSecurityDescriptorDacl. error = ", sys::error());
+        return;
+      }
+      sa_.nLength = sizeof(SECURITY_ATTRIBUTES);
+      sa_.bInheritHandle = FALSE;
+      sa_.lpSecurityDescriptor = &sd_;
+      succ_ = true;
+    }
+  } handle;
+  return handle.succ_ ? &handle.sa_ : nullptr;
+}
+
+/**
+ * \brief Closes an open object handle.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
+ */
+inline result<void> close_handle(HANDLE h) noexcept {
+  LIBIMP_LOG_();
+  if (h == NULL) {
+    log.error("handle is null.");
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  if (!::CloseHandle(h)) {
+    auto err = sys::error();
+    log.error("failed: CloseHandle(", h, "). error = ", err);
+    return err;
+  }
+  return std::error_code{};
+}
 
 /**
  * \brief Creates or opens a file mapping object for a specified file.
@@ -50,7 +100,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
     log.error("file name is empty.");
     return std::make_error_code(std::errc::invalid_argument);
   }
-  auto t_name = detail::to_tstring(file);
+  auto t_name = winapi::to_tstring(file);
   if (t_name.empty()) {
     log.error("file name is empty. (TCHAR conversion failed)");
     return std::make_error_code(std::errc::invalid_argument);
@@ -69,7 +119,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
 
   // Creates or opens a named or unnamed file mapping object for a specified file.
   auto try_create = [&]() -> result<HANDLE> {
-    HANDLE h = ::CreateFileMapping(INVALID_HANDLE_VALUE, detail::get_sa(), PAGE_READWRITE | SEC_COMMIT,
+    HANDLE h = ::CreateFileMapping(INVALID_HANDLE_VALUE, winapi::get_sa(), PAGE_READWRITE | SEC_COMMIT,
                                    /// \remark dwMaximumSizeHigh always 0 here.
                                    0, static_cast<DWORD>(size), t_name.c_str());
     if (h == NULL) {
@@ -161,5 +211,5 @@ result<void> mmap_release(HANDLE h, LPCVOID mem) {
   return winapi::close_handle(h);
 }
 
-} // namespace
+} // namespace winapi
 LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/close_handle.h b/src/libipc/platform/win/close_handle.h
deleted file mode 100644
index b7c51e77..00000000
--- a/src/libipc/platform/win/close_handle.h
+++ /dev/null
@@ -1,38 +0,0 @@
-/**
- * \file libipc/platform/win/close_handle.h
- * \author mutouyun (orz@orzz.org)
- */
-#pragma once
-
-#include <Windows.h>
-
-#include "libimp/log.h"
-#include "libimp/system.h"
-
-#include "libipc/def.h"
-
-LIBIPC_NAMESPACE_BEG_
-using namespace ::LIBIMP;
-
-namespace winapi {
-
-/**
- * \brief Closes an open object handle.
- * \see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
- */
-inline result<void> close_handle(HANDLE h) noexcept {
-  LIBIMP_LOG_();
-  if (h == NULL) {
-    log.error("handle is null.");
-    return std::make_error_code(std::errc::invalid_argument);
-  }
-  if (!::CloseHandle(h)) {
-    auto err = sys::error();
-    log.error("failed: CloseHandle(", h, "). error = ", err);
-    return err;
-  }
-  return std::error_code{};
-}
-
-} // namespace winapi
-LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/event_impl.h b/src/libipc/platform/win/event_impl.h
index be441fcb..ada9d56d 100644
--- a/src/libipc/platform/win/event_impl.h
+++ b/src/libipc/platform/win/event_impl.h
@@ -9,15 +9,11 @@
 #include <vector>
 #include <cstddef>
 
-#include <Windows.h>
-
 #include "libimp/log.h"
 #include "libpmr/new.h"
 #include "libipc/event.h"
 
-#include "get_sa.h"
-#include "to_tchar.h"
-#include "close_handle.h"
+#include "api.h"
 
 LIBIPC_NAMESPACE_BEG_
 
@@ -45,8 +41,8 @@ bool is_valid(evt_t evt) noexcept {
  */
 result<evt_t> evt_open(std::string name) noexcept {
   LIBIMP_LOG_();
-  auto t_name = detail::to_tstring(name);
-  auto h = ::CreateEvent(detail::get_sa(), 
+  auto t_name = winapi::to_tstring(name);
+  auto h = ::CreateEvent(winapi::get_sa(), 
                         /*bManualReset*/ FALSE, 
                         /*bInitialState*/FALSE, 
                         /*lpName*/       t_name.c_str());
diff --git a/src/libipc/platform/win/get_sa.h b/src/libipc/platform/win/get_sa.h
deleted file mode 100644
index 91ec7d37..00000000
--- a/src/libipc/platform/win/get_sa.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/**
- * \file libipc/platform/win/get_sa.h
- * \author mutouyun (orz@orzz.org)
- */
-#pragma once
-
-#include <securitybaseapi.h>
-
-#include "libimp/system.h"
-#include "libimp/log.h"
-
-#include "libipc/def.h"
-
-LIBIPC_NAMESPACE_BEG_
-namespace detail {
-
-/**
- * \brief Create a SECURITY_ATTRIBUTES structure singleton
- * \see https://docs.microsoft.com/en-us/previous-versions/windows/desktop/legacy/aa379560(v=vs.85)
- */
-inline LPSECURITY_ATTRIBUTES get_sa() {
-  static struct initiator {
-
-    SECURITY_DESCRIPTOR sd_;
-    SECURITY_ATTRIBUTES sa_;
-
-    bool succ_ = false;
-
-    initiator() {
-      using namespace ::LIBIMP;
-      LIBIMP_LOG_("get_sa");
-      if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
-        log.error("failed: InitializeSecurityDescriptor(SECURITY_DESCRIPTOR_REVISION). "
-                  "error = ", sys::error());
-        return;
-      }
-      if (!::SetSecurityDescriptorDacl(&sd_, TRUE, NULL, FALSE)) {
-        log.error("failed: SetSecurityDescriptorDacl. error = ", sys::error());
-        return;
-      }
-      sa_.nLength = sizeof(SECURITY_ATTRIBUTES);
-      sa_.bInheritHandle = FALSE;
-      sa_.lpSecurityDescriptor = &sd_;
-      succ_ = true;
-    }
-  } handle;
-  return handle.succ_ ? &handle.sa_ : nullptr;
-}
-
-} // namespace detail
-LIBIPC_NAMESPACE_END_
\ No newline at end of file
diff --git a/src/libipc/platform/win/process_impl.h b/src/libipc/platform/win/process_impl.h
deleted file mode 100644
index 3468825f..00000000
--- a/src/libipc/platform/win/process_impl.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/**
- * \file libipc/platform/win/process_impl.h
- * \author mutouyun (orz@orzz.org)
- */
-#pragma once
-
-#include <phnt_windows.h>
-#include <phnt.h>
-
-#include "libimp/log.h"
-#include "libipc/process.h"
-
-LIBIPC_NAMESPACE_BEG_
-using namespace ::LIBIMP;
-
-/// \brief Experimental fork() on Windows.
-/// \see https://gist.github.com/Cr4sh/126d844c28a7fbfd25c6
-///      https://github.com/huntandhackett/process-cloning
-namespace {
-
-typedef SSIZE_T pid_t;
-
-pid_t fork() {
-  LIBIMP_LOG_();
-
-  RTL_USER_PROCESS_INFORMATION process_info;
-  NTSTATUS status;
-
-  /* lets do this */
-  status = RtlCloneUserProcess(RTL_CLONE_PROCESS_FLAGS_INHERIT_HANDLES
-                             , NULL, NULL, NULL, &process_info);
-  if (status == STATUS_PROCESS_CLONED) {
-    // Executing inside the clone...
-    // Re-attach to the parent's console to be able to write to it
-    FreeConsole();
-    AttachConsole(ATTACH_PARENT_PROCESS);
-    return 0;
-  } else {
-    // Executing inside the original (parent) process...
-    if (!NT_SUCCESS(status)) {
-      log.error("failed: RtlCloneUserProcess(...)");
-      return -1;
-    }
-    return (pid_t)process_info.ProcessHandle;
-  }
-
-  /* NOTREACHED */
-}
-
-#define	WNOHANG 1	/* Don't block waiting. */
-
-/// \see https://man7.org/linux/man-pages/man3/wait.3p.html
-///      https://learn.microsoft.com/en-us/windows/win32/api/winternl/nf-winternl-ntwaitforsingleobject
-pid_t waitpid(pid_t pid, int */*status*/, int options) {
-  LIBIMP_LOG_();
-  if (pid == -1) {
-    return -1;
-  }
-  if (options & WNOHANG) {
-    return pid;
-  }
-  NTSTATUS status = NtWaitForSingleObject((HANDLE)pid, FALSE, NULL);
-  if (!NT_SUCCESS(status)) {
-    log.error("failed: NtWaitForSingleObject(...)");
-    return -1;
-  }
-  return pid;
-}
-
-} // namespace
-LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index e6b0296a..1dde5efa 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -12,28 +12,34 @@
 #include "libpmr/new.h"
 #include "libipc/shm.h"
 
-#include "mmap_impl.h"
-#include "close_handle.h"
+#include "api.h"
 
 LIBIPC_NAMESPACE_BEG_
 
 using namespace ::LIBIMP;
 using namespace ::LIBPMR;
 
+struct shm_handle {
+  std::string file;
+  std::size_t f_sz;
+  void *memp;
+  HANDLE h_fmap;
+};
+
 result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
   LIBIMP_LOG_();
-  auto h = mmap_open(name, size, type);
+  auto h = winapi::mmap_open(name, size, type);
   if (*h == NULL) {
     log.error("failed: mmap_open(name = ", name, ", size = ", size, ", type = ", type, ").");
     return h.error();
   }
-  auto mem = mmap_memof(*h);
+  auto mem = winapi::mmap_memof(*h);
   if (*mem == NULL) {
     log.error("failed: mmap_memof(", *h, ").");
     winapi::close_handle(*h);
     return mem.error();
   }
-  auto sz = mmap_sizeof(*mem);
+  auto sz = winapi::mmap_sizeof(*mem);
   if (!sz) {
     log.error("failed: mmap_sizeof(", *mem, ").");
     winapi::close_handle(*h);
@@ -49,7 +55,7 @@ result<void> shm_close(shm_t h) noexcept {
     return std::make_error_code(std::errc::invalid_argument);
   }
   auto shm = static_cast<shm_handle *>(h);
-  auto ret = mmap_release(shm->h_fmap, shm->memp);
+  auto ret = winapi::mmap_release(shm->h_fmap, shm->memp);
   $delete(shm);
   return ret;
 }
diff --git a/src/libipc/platform/win/to_tchar.h b/src/libipc/platform/win/to_tchar.h
deleted file mode 100644
index 9f0e580d..00000000
--- a/src/libipc/platform/win/to_tchar.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/**
- * \file libipc/platform/win/to_tchar.h
- * \author mutouyun (orz@orzz.org)
- */
-#pragma once
-
-#include <tchar.h>
-
-#include <string>
-
-#include "libimp/codecvt.h"
-
-#include "libipc/def.h"
-
-LIBIPC_NAMESPACE_BEG_
-namespace detail {
-
-using tstring = std::basic_string<TCHAR>;
-
-inline tstring to_tstring(std::string const &str) {
-  tstring des;
-  ::LIBIMP::cvt_sstr(str, des);
-  return des;
-}
-
-} // namespace detail
-LIBIPC_NAMESPACE_END_
\ No newline at end of file

From f38d77beb952e06d148bddc079c3fb74a05d0f75 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 21 Sep 2024 18:57:02 +0800
Subject: [PATCH 268/272] Refactor default_traits to include support for enum
 types

---
 include/libimp/result.h              |  5 ++-
 src/libipc/platform/win/api.h        | 60 ++++++++++++++++++++++++++--
 src/libipc/platform/win/event_impl.h | 42 +++++++++----------
 3 files changed, 77 insertions(+), 30 deletions(-)

diff --git a/include/libimp/result.h b/include/libimp/result.h
index 6b9d3746..d9f2a9ad 100644
--- a/include/libimp/result.h
+++ b/include/libimp/result.h
@@ -92,7 +92,8 @@ struct default_traits<void, ___> {
 };
 
 template <typename T>
-struct default_traits<T, std::enable_if_t<std::is_integral<T>::value>> : generic_traits<T> {
+struct default_traits<T, std::enable_if_t<std::is_integral<T>::value || std::is_enum<T>::value>>
+     : generic_traits<T> {
   /// \brief Custom initialization.
   static constexpr void init_code(typename generic_traits<T>::storage_t &code, 
                                   T value, bool ok) noexcept {
@@ -192,7 +193,7 @@ std::string default_traits<void, ___>::format(result<void> const &r) {
 }
 
 template <typename T>
-std::string default_traits<T, std::enable_if_t<std::is_integral<T>::value>>
+std::string default_traits<T, std::enable_if_t<std::is_integral<T>::value || std::is_enum<T>::value>>
           ::format(result<T> const &r) noexcept {
   return fmt(*r);
 }
diff --git a/src/libipc/platform/win/api.h b/src/libipc/platform/win/api.h
index 45f94e35..455df0d7 100644
--- a/src/libipc/platform/win/api.h
+++ b/src/libipc/platform/win/api.h
@@ -14,10 +14,12 @@
 #include "libimp/log.h"
 #include "libimp/system.h"
 #include "libimp/codecvt.h"
+#include "libimp/span.h"
 
 #include "libipc/def.h"
 
 LIBIPC_NAMESPACE_BEG_
+
 using namespace ::LIBIMP;
 
 namespace winapi {
@@ -94,7 +96,7 @@ inline result<void> close_handle(HANDLE h) noexcept {
  * 
  * \return File mapping object HANDLE, NULL on error.
  */
-result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type type) noexcept {
+inline result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type type) noexcept {
   LIBIMP_LOG_();
   if (file.empty()) {
     log.error("file name is empty.");
@@ -157,7 +159,7 @@ result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type t
  * \brief Maps a view of a file mapping into the address space of a calling process.
  * \see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-mapviewoffile
  */
-result<LPVOID> mmap_memof(HANDLE h) {
+inline result<LPVOID> mmap_memof(HANDLE h) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
@@ -176,7 +178,7 @@ result<LPVOID> mmap_memof(HANDLE h) {
  * \brief Retrieves the size about a range of pages in the virtual address space of the calling process.
  * \see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-virtualquery
  */
-result<SIZE_T> mmap_sizeof(LPCVOID mem) {
+inline result<SIZE_T> mmap_sizeof(LPCVOID mem) {
   LIBIMP_LOG_();
   if (mem == NULL) {
     log.error("memory pointer is null.");
@@ -195,7 +197,7 @@ result<SIZE_T> mmap_sizeof(LPCVOID mem) {
  * \brief Unmaps a mapped view of a file from the calling process's address space.
  * \see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-unmapviewoffile
  */
-result<void> mmap_release(HANDLE h, LPCVOID mem) {
+inline result<void> mmap_release(HANDLE h, LPCVOID mem) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
@@ -211,5 +213,55 @@ result<void> mmap_release(HANDLE h, LPCVOID mem) {
   return winapi::close_handle(h);
 }
 
+enum class wait_result {
+  object_0,
+  abandoned,
+  timeout
+};
+
+/**
+ * \brief Waits until the specified object is in the signaled state or the time-out interval elapses.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitforsingleobject
+ */
+inline result<wait_result> wait_for_single_object(HANDLE h, std::int64_t ms) noexcept {
+  LIBIMP_LOG_();
+  DWORD dwMilliseconds = (ms < 0) ? INFINITE : static_cast<DWORD>(ms);
+  DWORD r = ::WaitForSingleObject(h, dwMilliseconds);
+  if (r == WAIT_FAILED) {
+    auto err = sys::error();
+    log.error("failed: WaitForSingleObject(", h, ", ", dwMilliseconds, "). error = ", err);
+    return err;
+  }
+  if (r == WAIT_OBJECT_0) {
+    return wait_result::object_0;
+  }
+  if (r == WAIT_ABANDONED) {
+    return wait_result::abandoned;
+  }
+  return wait_result::timeout;
+}
+
+/**
+ * \brief Waits until one or all of the specified objects are in the signaled state or the time-out interval elapses.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitformultipleobjects
+ */
+inline result<wait_result> wait_for_multiple_objects(span<HANDLE const> handles, std::int64_t ms) noexcept {
+  LIBIMP_LOG_();
+  DWORD dwMilliseconds = (ms < 0) ? INFINITE : static_cast<DWORD>(ms);
+  DWORD r = ::WaitForMultipleObjects(static_cast<DWORD>(handles.size()), handles.data(), FALSE, dwMilliseconds);
+  if (r == WAIT_FAILED) {
+    auto err = sys::error();
+    log.error("failed: WaitForMultipleObjects(", handles.size(), ", ", dwMilliseconds, "). error = ", err);
+    return err;
+  }
+  if ((r >= WAIT_OBJECT_0) && (r < WAIT_OBJECT_0 + handles.size())) {
+    return wait_result::object_0;
+  }
+  if ((r >= WAIT_ABANDONED_0) && (r < WAIT_ABANDONED_0 + handles.size())) {
+    return wait_result::abandoned;
+  }
+  return wait_result::timeout;
+}
+
 } // namespace winapi
 LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/event_impl.h b/src/libipc/platform/win/event_impl.h
index ada9d56d..54038e8d 100644
--- a/src/libipc/platform/win/event_impl.h
+++ b/src/libipc/platform/win/event_impl.h
@@ -95,21 +95,18 @@ result<bool> evt_wait(evt_t evt, std::int64_t ms) noexcept {
     log.error("handle is null.");
     return std::make_error_code(std::errc::invalid_argument);
   }
-  DWORD dwMilliseconds = (ms < 0) ? INFINITE : static_cast<DWORD>(ms);
-  auto r = ::WaitForSingleObject(evt->h_event, dwMilliseconds);
-  if (r == WAIT_TIMEOUT) {
-    return false;
-  }
-  if (r == WAIT_ABANDONED_0) {
-    log.error("failed: WaitForSingleObject(", evt->h_event, ", ", dwMilliseconds, "). error = WAIT_ABANDONED_0");
-    return {};
+  auto r = winapi::wait_for_single_object(evt->h_event, ms);
+  if (!r) {
+    return r.error();
   }
-  if (r == WAIT_OBJECT_0) {
+  if (*r == winapi::wait_result::object_0) {
     return true;
   }
-  auto err = sys::error();
-  log.error("failed: WaitForSingleObject(", evt->h_event, ", ", dwMilliseconds, "). error = ", err);
-  return err;
+  if (*r == winapi::wait_result::abandoned) {
+    log.error("failed: WaitForSingleObject(", evt->h_event, ", ", ms, "). error = WAIT_ABANDONED");
+    return false;
+  }
+  return false;
 }
 
 /**
@@ -132,21 +129,18 @@ result<bool> evt_wait(::LIBIMP::span<evt_t const> evts, std::int64_t ms) noexcep
     handles[i] = evts[i]->h_event;
   }
   // Wait for the events.
-  DWORD dwMilliseconds = (ms < 0) ? INFINITE : static_cast<DWORD>(ms);
-  auto r = ::WaitForMultipleObjects(static_cast<DWORD>(handles.size()), handles.data(), FALSE, dwMilliseconds);
-  if (r == WAIT_TIMEOUT) {
-    return false;
-  }
-  if ((r >= WAIT_ABANDONED_0) && (r < WAIT_ABANDONED_0 + handles.size())) {
-    log.error("failed: WaitForMultipleObjects(", handles.size(), ", ", dwMilliseconds, "). error = WAIT_ABANDONED_0 + ", r - WAIT_ABANDONED_0);
-    return {};
+  auto r = winapi::wait_for_multiple_objects(handles, ms);
+  if (!r) {
+    return r.error();
   }
-  if ((r >= WAIT_OBJECT_0) && (r < WAIT_OBJECT_0 + handles.size())) {
+  if (*r == winapi::wait_result::object_0) {
     return true;
   }
-  auto err = sys::error();
-  log.error("failed: WaitForMultipleObjects(", handles.size(), ", ", dwMilliseconds, "). error = ", err);
-  return err;
+  if (*r == winapi::wait_result::abandoned) {
+    log.error("failed: WaitForMultipleObjects(", handles.size(), ", ", ms, "). error = WAIT_ABANDONED");
+    return false;
+  }
+  return false;
 }
 
 LIBIPC_NAMESPACE_END_

From 65cb048f59f15fdd4ee7d9ecfe25e24aef8a3da2 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Mon, 23 Sep 2024 00:12:21 +0800
Subject: [PATCH 269/272] Refactor mutex implementation for Windows platform

---
 include/libipc/mutex.h               | 46 +++++++++++++++
 src/libipc/mutex.cpp                 | 18 ++++++
 src/libipc/platform/win/mutex_impl.h | 85 ++++++++++++++++++++++++++++
 3 files changed, 149 insertions(+)
 create mode 100644 include/libipc/mutex.h
 create mode 100644 src/libipc/mutex.cpp
 create mode 100644 src/libipc/platform/win/mutex_impl.h

diff --git a/include/libipc/mutex.h b/include/libipc/mutex.h
new file mode 100644
index 00000000..a6a6c539
--- /dev/null
+++ b/include/libipc/mutex.h
@@ -0,0 +1,46 @@
+/**
+ * \file libipc/mutex.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief A synchronization primitive that can be used to protect shared data 
+ *        from being simultaneously accessed by multiple processes.
+ */
+#pragma once
+
+#include <string>
+#include <cstddef>
+#include <cstdint>
+
+#include "libimp/export.h"
+#include "libimp/result.h"
+#include "libimp/span.h"
+#include "libimp/byte.h"
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+struct mutex_handle;
+using mutex_t = mutex_handle *;
+
+/// \brief Create or open a mutex object based on memory.
+LIBIMP_EXPORT ::LIBIMP::result<mutex_t> mutex_open(::LIBIMP::span<::LIBIMP::byte>) noexcept;
+
+/// \brief Close the mutex handle.
+/// \note The mutex object will be destroyed when the last handle is closed,
+///       and the lifetime of a mutex object needs to be shorter than 
+///       the memory specified when it is created or opened.
+LIBIMP_EXPORT ::LIBIMP::result<void> mutex_close(mutex_t) noexcept;
+
+/// \brief Gets the memory size of the specified mutex.
+LIBIMP_EXPORT ::LIBIMP::result<std::size_t> mutex_size(mutex_t) noexcept;
+
+/// \brief Locks the mutex, blocks if the mutex is not available.
+LIBIMP_EXPORT ::LIBIMP::result<bool> mutex_lock(mutex_t, std::int64_t ms) noexcept;
+
+/// \brief Tries to lock the mutex, returns if the mutex is not available.
+LIBIMP_EXPORT ::LIBIMP::result<bool> mutex_try_lock(mutex_t) noexcept;
+
+/// \brief Unlocks the mutex.
+LIBIMP_EXPORT ::LIBIMP::result<bool> mutex_unlock(mutex_t) noexcept;
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/mutex.cpp b/src/libipc/mutex.cpp
new file mode 100644
index 00000000..71ad9f0d
--- /dev/null
+++ b/src/libipc/mutex.cpp
@@ -0,0 +1,18 @@
+
+#include "libimp/log.h"
+
+#include "libimp/detect_plat.h"
+#if defined(LIBIMP_OS_WIN)
+# include "libipc/platform/win/mutex_impl.h"
+#else
+#endif
+
+#if !defined(LIBIMP_OS_LINUX)
+LIBIPC_NAMESPACE_BEG_
+
+/// \brief C style mutex access interface implementation.
+
+/// \brief The mutex object.
+
+LIBIPC_NAMESPACE_END_
+#endif
diff --git a/src/libipc/platform/win/mutex_impl.h b/src/libipc/platform/win/mutex_impl.h
new file mode 100644
index 00000000..a61cfc4e
--- /dev/null
+++ b/src/libipc/platform/win/mutex_impl.h
@@ -0,0 +1,85 @@
+/**
+ * \file libipc/platform/win/mutex_impl.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include "libimp/log.h"
+#include "libimp/system.h"
+#include "libipc/mutex.h"
+
+#include "api.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+using namespace ::LIBIMP;
+
+struct mutex_handle {
+
+};
+
+namespace winapi {
+
+/**
+ * \brief Creates or opens a named or unnamed mutex object.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-createmutexa
+ * \return Mutex object HANDLE, NULL on error.
+ */
+result<HANDLE> mutex_open_or_create(char const *name, bool initial_owner) noexcept {
+  LIBIMP_LOG_();
+  HANDLE h = ::CreateMutexA(winapi::get_sa(), initial_owner, name);
+  if (h == NULL) {
+    auto err = sys::error();
+    log.error("failed: CreateMutexA(", initial_owner, ", ", name, "). error = ", err);
+    return err;
+  }
+  return h;
+}
+
+/**
+ * \brief Releases ownership of the specified mutex object.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-releasemutex
+*/
+result<bool> mutex_release(HANDLE h) noexcept {
+  LIBIMP_LOG_();
+  if (::ReleaseMutex(h)) {
+    return true;
+  }
+  auto err = sys::error();
+  log.error("failed: ReleaseMutex. error = ", err);
+  return err;
+}
+
+/**
+ * \brief Locks the mutex, blocks if the mutex is not available.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitforsingleobject
+*/
+result<bool> mutex_wait(HANDLE h, std::int64_t ms) noexcept {
+  LIBIMP_LOG_();
+  for (;;) {
+    auto r = winapi::wait_for_single_object(h, ms);
+    if (!r) {
+      return r.error();
+    }
+    if (*r == winapi::wait_result::object_0) {
+      return true;
+    }
+    if (*r == winapi::wait_result::abandoned) {
+      log.info("failed: WaitForSingleObject(", ms, "). The mutex is abandoned, try again.");
+      auto rr = mutex_release(h);
+      if (rr) {
+        continue;
+      }
+      return rr.error();
+    }
+    return false;
+  }
+}
+
+} // namespace winapi
+
+result<mutex_t> mutex_open(span<::LIBIMP::byte> mem) noexcept {
+  return {};
+}
+
+LIBIPC_NAMESPACE_END_

From 25ea4e016c586ec8dd54d38894d54db1e03d3955 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 28 Sep 2024 20:41:23 +0800
Subject: [PATCH 270/272] add LIBIMP_INLINE_CONSTEXPR

---
 include/libimp/detect_plat.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
index 1bc12dca..b6f5ec19 100644
--- a/include/libimp/detect_plat.h
+++ b/include/libimp/detect_plat.h
@@ -106,6 +106,14 @@
 # error "This C++ version is unsupported."
 #endif
 
+/// \brief Feature cross-platform adaptation.
+
+#if defined(LIBIMP_CPP_17)
+# define LIBIMP_INLINE_CONSTEXPR inline constexpr
+#else
+# define LIBIMP_INLINE_CONSTEXPR constexpr
+#endif
+
 /// \brief C++ attributes.
 /// \see https://en.cppreference.com/w/cpp/language/attributes
 

From 7491a33d85e2724f98cc30296aaf6cddd7be7680 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 28 Sep 2024 20:43:05 +0800
Subject: [PATCH 271/272] xmake compilation is supported

---
 benchmark/xmake.lua  | 26 ++++++++++++++++++
 include/libimp/log.h |  8 ++++--
 src/libimp/xmake.lua |  6 +++++
 src/libipc/xmake.lua | 22 ++++++++++++++++
 src/libpmr/xmake.lua |  7 +++++
 src/xmake.lua        |  1 +
 test/xmake.lua       | 25 ++++++++++++++++++
 xmake.lua            | 63 ++++++++++++++++++++++++++++++++++++++++++++
 8 files changed, 156 insertions(+), 2 deletions(-)
 create mode 100644 benchmark/xmake.lua
 create mode 100644 src/libimp/xmake.lua
 create mode 100644 src/libipc/xmake.lua
 create mode 100644 src/libpmr/xmake.lua
 create mode 100644 src/xmake.lua
 create mode 100644 test/xmake.lua
 create mode 100644 xmake.lua

diff --git a/benchmark/xmake.lua b/benchmark/xmake.lua
new file mode 100644
index 00000000..d78539a6
--- /dev/null
+++ b/benchmark/xmake.lua
@@ -0,0 +1,26 @@
+add_requires("benchmark 1.9.*", "fmt 11.0.*")
+
+target("benchmark-ipc")
+  set_kind("binary")
+  add_deps("imp", "pmr", "ipc")
+  add_packages("benchmark", "fmt")
+  if is_os("windows") then
+    add_ldflags("/subsystem:console")
+  elseif is_os("linux") then
+    add_syslinks("rt")
+  end
+  on_config(config_target_compilation)
+  on_config(function (target)
+    if target:has_tool("cxx", "cl") then
+      target:add("defines", "_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING")
+    else
+      target:add("cxflags", "-Wno-missing-field-initializers"
+                          , "-Wno-unused-variable"
+                          , "-Wno-unused-function"
+                          , "-Wno-unused-result")
+    end
+  end)
+  add_includedirs("$(projectdir)/include"
+                , "$(projectdir)/src"
+                , "$(projectdir)/test")
+  add_files("*.cpp")
diff --git a/include/libimp/log.h b/include/libimp/log.h
index b1650af9..888a07c5 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -187,7 +187,11 @@ inline auto make_logger(char const * /*ignore*/, char const *name, level level_l
   return make_logger(name, make_std_out(), level_limit);
 }
 
+#define LIBIMP_LOG_(...) \
+  auto log \
+    = [](auto &&...args) noexcept { \
+        return ::LIBIMP::log::make_logger(__func__, std::forward<decltype(args)>(args)...); \
+      }(__VA_ARGS__)
+
 } // namespace log
 LIBIMP_NAMESPACE_END_
-
-#define LIBIMP_LOG_(...) auto log = ::LIBIMP::log::make_logger(__func__,##__VA_ARGS__)
\ No newline at end of file
diff --git a/src/libimp/xmake.lua b/src/libimp/xmake.lua
new file mode 100644
index 00000000..cb464bd9
--- /dev/null
+++ b/src/libimp/xmake.lua
@@ -0,0 +1,6 @@
+target("imp")
+  set_kind("static")
+  on_config(config_target_compilation)
+  add_includedirs("$(projectdir)/include", {public = true})
+  add_includedirs("$(projectdir)/src")
+  add_files("$(projectdir)/src/libimp/**.cpp")
diff --git a/src/libipc/xmake.lua b/src/libipc/xmake.lua
new file mode 100644
index 00000000..a15966f9
--- /dev/null
+++ b/src/libipc/xmake.lua
@@ -0,0 +1,22 @@
+target("ipc")
+  if has_config("build_shared_lib") then
+    set_kind("shared")
+    add_defines("LIBIMP_LIBRARY_SHARED_BUILDING__")
+  else
+    set_kind("static")
+  end
+  add_deps("imp", "pmr")
+  if is_os("linux") then
+    add_syslinks("pthread", "rt")
+  elseif is_os("windows") then
+    add_syslinks("Advapi32")
+  end
+  on_config(config_target_compilation)
+  on_config(function (target)
+    if (not target:has_tool("cxx", "cl")) and has_config("build_shared_lib") then
+      target:add("linkgroups", "imp", "pmr", {whole = true})
+    end
+  end)
+  add_includedirs("$(projectdir)/include", {public = true})
+  add_includedirs("$(projectdir)/src")
+  add_files("$(projectdir)/src/libipc/**.cpp")
diff --git a/src/libpmr/xmake.lua b/src/libpmr/xmake.lua
new file mode 100644
index 00000000..02ccfe20
--- /dev/null
+++ b/src/libpmr/xmake.lua
@@ -0,0 +1,7 @@
+target("pmr")
+  set_kind("static")
+  add_deps("imp")
+  on_config(config_target_compilation)
+  add_includedirs("$(projectdir)/include", {public = true})
+  add_includedirs("$(projectdir)/src")
+  add_files("$(projectdir)/src/libpmr/**.cpp")
diff --git a/src/xmake.lua b/src/xmake.lua
new file mode 100644
index 00000000..6182196b
--- /dev/null
+++ b/src/xmake.lua
@@ -0,0 +1 @@
+includes("libimp", "libpmr", "libipc")
diff --git a/test/xmake.lua b/test/xmake.lua
new file mode 100644
index 00000000..44264140
--- /dev/null
+++ b/test/xmake.lua
@@ -0,0 +1,25 @@
+add_requires("gtest 1.15.*", {configs = {main = true}})
+
+target("test-ipc")
+  set_kind("binary")
+  add_deps("ipc")
+  add_packages("gtest")
+  add_links("gtest_main")
+  if is_os("windows") then
+    add_ldflags("/subsystem:console")
+  end
+  on_config(config_target_compilation)
+  on_config(function (target)
+    if target:has_tool("cxx", "cl") then
+      target:add("cxflags", "/wd4723")
+    else
+      target:add("links", "gtest_main")
+      target:add("cxflags", "-Wno-missing-field-initializers"
+                          , "-Wno-unused-variable"
+                          , "-Wno-unused-function")
+    end
+  end)
+  add_includedirs("$(projectdir)/include"
+                , "$(projectdir)/src"
+                , "$(projectdir)/test")
+  add_files("$(projectdir)/test/**.cpp")
diff --git a/xmake.lua b/xmake.lua
new file mode 100644
index 00000000..18f522a0
--- /dev/null
+++ b/xmake.lua
@@ -0,0 +1,63 @@
+set_project("cpp-ipc")
+set_version("2.0.0", {build = "%Y%m%d%H%M"})
+
+-- Build all of libipc's own tests.
+option("build_tests") set_default(false)
+-- Build all of libipc's own demos.
+option("build_demos") set_default(false)
+-- Build all of libipc's own benchmark tests.
+option("build_benchmarks") set_default(false)
+-- Build shared libraries (DLLs).
+option("build_shared_lib") set_default(false)
+-- Set to ON to build with static CRT on Windows (/MT).
+option("use_static_crt") set_default(false)
+-- Build with unit test coverage.
+option("use_codecov") set_default(false)
+option_end()
+
+add_rules("mode.debug", "mode.release")
+set_languages("cxx17")
+if is_mode("debug") then
+  if has_config("use_static_crt") then
+    set_runtimes("MTd")
+  else
+    set_runtimes("MDd")
+  end
+else
+  if has_config("use_static_crt") then
+    set_runtimes("MT")
+  else
+    set_runtimes("MD")
+  end
+end
+
+function config_target_compilation(target)
+  if target:has_tool("cxx", "cl") then
+    target:add("defines", "UNICODE", "_UNICODE")
+    if is_mode("debug") then
+      target:add("cxflags", "/Zi")
+    end
+  else
+    target:add("cxflags", "-fPIC", "-Wno-attributes")
+    if has_config("use_codecov") then
+      target:add("cxflags", "--coverage")
+      target:add("ldflags", "--coverage")
+      target:add("syslinks", "gcov")
+    end
+    if is_mode("debug") then
+      target:add("cxflags", "-rdynamic -fsanitize=address")
+      target:add("ldflags", "-fsanitize=address")
+    end
+  end
+end
+
+includes("src")
+if has_config("build_tests") then
+  includes("test")
+end
+if has_config("build_demos") then
+  includes("demo")
+end
+if has_config("build_benchmarks") then
+  includes("benchmark")
+end

From 5eafc13c1af48c0e27fa62448f8fff8c5833f8bd Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 28 Sep 2024 20:44:10 +0800
Subject: [PATCH 272/272] Refactor the windows api adaptation layer

---
 src/libipc/platform/win/api.h        | 93 +++++++++++++++++++++++++---
 src/libipc/platform/win/event_impl.h |  2 +-
 src/libipc/platform/win/mutex_impl.h | 63 +------------------
 src/libipc/platform/win/shm_impl.h   | 14 ++---
 4 files changed, 96 insertions(+), 76 deletions(-)

diff --git a/src/libipc/platform/win/api.h b/src/libipc/platform/win/api.h
index 455df0d7..67162bca 100644
--- a/src/libipc/platform/win/api.h
+++ b/src/libipc/platform/win/api.h
@@ -15,6 +15,7 @@
 #include "libimp/system.h"
 #include "libimp/codecvt.h"
 #include "libimp/span.h"
+#include "libimp/detect_plat.h"
 
 #include "libipc/def.h"
 
@@ -33,10 +34,10 @@ inline tstring to_tstring(std::string const &str) {
 }
 
 /**
- * \brief Create a SECURITY_ATTRIBUTES structure singleton
+ * \brief Creates or opens a SECURITY_ATTRIBUTES structure singleton
  * \see https://docs.microsoft.com/en-us/previous-versions/windows/desktop/legacy/aa379560(v=vs.85)
  */
-inline LPSECURITY_ATTRIBUTES get_sa() {
+inline LPSECURITY_ATTRIBUTES get_security_descriptor() {
   static struct initiator {
 
     SECURITY_DESCRIPTOR sd_;
@@ -46,7 +47,7 @@ inline LPSECURITY_ATTRIBUTES get_sa() {
 
     initiator() {
       using namespace ::LIBIMP;
-      LIBIMP_LOG_("get_sa");
+      LIBIMP_LOG_("get_security_descriptor");
       if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
         log.error("failed: InitializeSecurityDescriptor(SECURITY_DESCRIPTOR_REVISION). "
                   "error = ", sys::error());
@@ -96,7 +97,7 @@ inline result<void> close_handle(HANDLE h) noexcept {
  * 
  * \return File mapping object HANDLE, NULL on error.
  */
-inline result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode::type type) noexcept {
+inline result<HANDLE> open_file_mapping(std::string const &file, std::size_t size, mode::type type) noexcept {
   LIBIMP_LOG_();
   if (file.empty()) {
     log.error("file name is empty.");
@@ -121,7 +122,7 @@ inline result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode:
 
   // Creates or opens a named or unnamed file mapping object for a specified file.
   auto try_create = [&]() -> result<HANDLE> {
-    HANDLE h = ::CreateFileMapping(INVALID_HANDLE_VALUE, winapi::get_sa(), PAGE_READWRITE | SEC_COMMIT,
+    HANDLE h = ::CreateFileMapping(INVALID_HANDLE_VALUE, winapi::get_security_descriptor(), PAGE_READWRITE | SEC_COMMIT,
                                    /// \remark dwMaximumSizeHigh always 0 here.
                                    0, static_cast<DWORD>(size), t_name.c_str());
     if (h == NULL) {
@@ -159,7 +160,7 @@ inline result<HANDLE> mmap_open(std::string const &file, std::size_t size, mode:
  * \brief Maps a view of a file mapping into the address space of a calling process.
  * \see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-mapviewoffile
  */
-inline result<LPVOID> mmap_memof(HANDLE h) {
+inline result<LPVOID> address_of_file_mapping(HANDLE h) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
@@ -178,7 +179,7 @@ inline result<LPVOID> mmap_memof(HANDLE h) {
  * \brief Retrieves the size about a range of pages in the virtual address space of the calling process.
  * \see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-virtualquery
  */
-inline result<SIZE_T> mmap_sizeof(LPCVOID mem) {
+inline result<SIZE_T> region_size_of_address(LPCVOID mem) {
   LIBIMP_LOG_();
   if (mem == NULL) {
     log.error("memory pointer is null.");
@@ -197,7 +198,7 @@ inline result<SIZE_T> mmap_sizeof(LPCVOID mem) {
  * \brief Unmaps a mapped view of a file from the calling process's address space.
  * \see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-unmapviewoffile
  */
-inline result<void> mmap_release(HANDLE h, LPCVOID mem) {
+inline result<void> close_file_mapping(HANDLE h, LPCVOID mem) {
   LIBIMP_LOG_();
   if (h == NULL) {
     log.error("handle is null.");
@@ -219,6 +220,8 @@ enum class wait_result {
   timeout
 };
 
+LIBIMP_INLINE_CONSTEXPR std::int64_t const infinite_time = -1;
+
 /**
  * \brief Waits until the specified object is in the signaled state or the time-out interval elapses.
  * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitforsingleobject
@@ -263,5 +266,79 @@ inline result<wait_result> wait_for_multiple_objects(span<HANDLE const> handles,
   return wait_result::timeout;
 }
 
+/**
+ * \brief Retrieves the current value of the performance counter, 
+ *        which is a high resolution (<1us) time stamp that can be used for time-interval measurements.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/profileapi/nf-profileapi-queryperformancecounter
+ */
+inline result<std::int64_t> query_performance_counter() noexcept {
+  LIBIMP_LOG_();
+  std::int64_t pc;
+  BOOL r = ::QueryPerformanceCounter(reinterpret_cast<LARGE_INTEGER *>(&pc));
+  if (!r) {
+    auto err = sys::error();
+    log.error("failed: QueryPerformanceCounter(). error = ", err);
+    return err;
+  }
+  return pc;
+}
+
+/**
+ * \brief Creates or opens a named or unnamed mutex object.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-createmutexa
+ * \return Mutex object HANDLE, NULL on error.
+ */
+inline result<HANDLE> open_mutex(char const *name, bool initial_owner) noexcept {
+  LIBIMP_LOG_();
+  HANDLE h = ::CreateMutexA(winapi::get_security_descriptor(), initial_owner, name);
+  if (h == NULL) {
+    auto err = sys::error();
+    log.error("failed: CreateMutexA(", initial_owner, ", ", name, "). error = ", err);
+    return err;
+  }
+  return h;
+}
+
+/**
+ * \brief Releases ownership of the specified mutex object.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-releasemutex
+*/
+inline result<bool> release_mutex(HANDLE h) noexcept {
+  LIBIMP_LOG_();
+  if (::ReleaseMutex(h)) {
+    return true;
+  }
+  auto err = sys::error();
+  log.error("failed: ReleaseMutex. error = ", err);
+  return err;
+}
+
+/**
+ * \brief Locks the mutex, blocks if the mutex is not available.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitforsingleobject
+*/
+inline result<bool> wait_mutex(HANDLE h, std::int64_t ms) noexcept {
+  LIBIMP_LOG_();
+  // If the mutex is abandoned, we need to release it and try again.
+  for (;;) {
+    auto r = winapi::wait_for_single_object(h, ms);
+    if (!r) {
+      return r.error();
+    }
+    if (*r == winapi::wait_result::object_0) {
+      return true;
+    }
+    if (*r == winapi::wait_result::abandoned) {
+      log.info("failed: WaitForSingleObject(", ms, "). The mutex is abandoned, try again.");
+      auto rr = release_mutex(h);
+      if (rr) {
+        continue;
+      }
+      return rr.error();
+    }
+    return false;
+  }
+}
+
 } // namespace winapi
 LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/event_impl.h b/src/libipc/platform/win/event_impl.h
index 54038e8d..4265f1bf 100644
--- a/src/libipc/platform/win/event_impl.h
+++ b/src/libipc/platform/win/event_impl.h
@@ -42,7 +42,7 @@ bool is_valid(evt_t evt) noexcept {
 result<evt_t> evt_open(std::string name) noexcept {
   LIBIMP_LOG_();
   auto t_name = winapi::to_tstring(name);
-  auto h = ::CreateEvent(winapi::get_sa(), 
+  auto h = ::CreateEvent(winapi::get_security_descriptor(), 
                         /*bManualReset*/ FALSE, 
                         /*bInitialState*/FALSE, 
                         /*lpName*/       t_name.c_str());
diff --git a/src/libipc/platform/win/mutex_impl.h b/src/libipc/platform/win/mutex_impl.h
index a61cfc4e..5fd6df8f 100644
--- a/src/libipc/platform/win/mutex_impl.h
+++ b/src/libipc/platform/win/mutex_impl.h
@@ -6,78 +6,21 @@
 
 #include "libimp/log.h"
 #include "libimp/system.h"
+#include "libpmr/new.h"
 #include "libipc/mutex.h"
 
 #include "api.h"
+#include "sync_id.h"
 
 LIBIPC_NAMESPACE_BEG_
 
 using namespace ::LIBIMP;
+using namespace ::LIBPMR;
 
 struct mutex_handle {
 
 };
 
-namespace winapi {
-
-/**
- * \brief Creates or opens a named or unnamed mutex object.
- * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-createmutexa
- * \return Mutex object HANDLE, NULL on error.
- */
-result<HANDLE> mutex_open_or_create(char const *name, bool initial_owner) noexcept {
-  LIBIMP_LOG_();
-  HANDLE h = ::CreateMutexA(winapi::get_sa(), initial_owner, name);
-  if (h == NULL) {
-    auto err = sys::error();
-    log.error("failed: CreateMutexA(", initial_owner, ", ", name, "). error = ", err);
-    return err;
-  }
-  return h;
-}
-
-/**
- * \brief Releases ownership of the specified mutex object.
- * \see https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-releasemutex
-*/
-result<bool> mutex_release(HANDLE h) noexcept {
-  LIBIMP_LOG_();
-  if (::ReleaseMutex(h)) {
-    return true;
-  }
-  auto err = sys::error();
-  log.error("failed: ReleaseMutex. error = ", err);
-  return err;
-}
-
-/**
- * \brief Locks the mutex, blocks if the mutex is not available.
- * \see https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitforsingleobject
-*/
-result<bool> mutex_wait(HANDLE h, std::int64_t ms) noexcept {
-  LIBIMP_LOG_();
-  for (;;) {
-    auto r = winapi::wait_for_single_object(h, ms);
-    if (!r) {
-      return r.error();
-    }
-    if (*r == winapi::wait_result::object_0) {
-      return true;
-    }
-    if (*r == winapi::wait_result::abandoned) {
-      log.info("failed: WaitForSingleObject(", ms, "). The mutex is abandoned, try again.");
-      auto rr = mutex_release(h);
-      if (rr) {
-        continue;
-      }
-      return rr.error();
-    }
-    return false;
-  }
-}
-
-} // namespace winapi
-
 result<mutex_t> mutex_open(span<::LIBIMP::byte> mem) noexcept {
   return {};
 }
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
index 1dde5efa..9b561340 100644
--- a/src/libipc/platform/win/shm_impl.h
+++ b/src/libipc/platform/win/shm_impl.h
@@ -28,20 +28,20 @@ struct shm_handle {
 
 result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
   LIBIMP_LOG_();
-  auto h = winapi::mmap_open(name, size, type);
+  auto h = winapi::open_file_mapping(name, size, type);
   if (*h == NULL) {
-    log.error("failed: mmap_open(name = ", name, ", size = ", size, ", type = ", type, ").");
+    log.error("failed: OpenFileMapping(name = ", name, ", size = ", size, ", type = ", type, ").");
     return h.error();
   }
-  auto mem = winapi::mmap_memof(*h);
+  auto mem = winapi::address_of_file_mapping(*h);
   if (*mem == NULL) {
-    log.error("failed: mmap_memof(", *h, ").");
+    log.error("failed: MapViewOfFile(", *h, ").");
     winapi::close_handle(*h);
     return mem.error();
   }
-  auto sz = winapi::mmap_sizeof(*mem);
+  auto sz = winapi::region_size_of_address(*mem);
   if (!sz) {
-    log.error("failed: mmap_sizeof(", *mem, ").");
+    log.error("failed: RegionSizeOfMemory(", *mem, ").");
     winapi::close_handle(*h);
     return sz.error();
   }
@@ -55,7 +55,7 @@ result<void> shm_close(shm_t h) noexcept {
     return std::make_error_code(std::errc::invalid_argument);
   }
   auto shm = static_cast<shm_handle *>(h);
-  auto ret = winapi::mmap_release(shm->h_fmap, shm->memp);
+  auto ret = winapi::close_file_mapping(shm->h_fmap, shm->memp);
   $delete(shm);
   return ret;
 }